From marian at mba-software.de  Mon Feb  7 01:21:01 2005
From: marian at mba-software.de (=?ISO-8859-1?Q?Marian_Aldenh=F6vel?=)
Date: Mon, 07 Feb 2005 07:21:01 +0100
Subject: Unable to run IDLE Under Windows
In-Reply-To: <060220052259038640%eq_fidget@mac.com>
References: <060220052259038640%eq_fidget@mac.com>
Message-ID: <36ofmlF533252U1@individual.net>

Hi,

 > Any ideas as to what might me wrong?

> TclError: unknown color name "white "

There is a space after "white" in this error-message. If this string comes
from some per-user configuration that may well explain your problem.

Ciao, MM
-- 
Marian Aldenh?vel, Rosenhain 23, 53123 Bonn. +49 228 624013.
http://www.marian-aldenhoevel.de
"Wir brauchen keine Opposition, wir sind bereits Demokraten."


From fredrik at pythonware.com  Tue Feb 22 11:07:31 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 22 Feb 2005 17:07:31 +0100
Subject: 'modal dialogs' with Tkinter
References: <e5063e96.0502220603.4163be98@posting.google.com>
Message-ID: <cvfl4k$5pm$1@sea.gmane.org>

Sean McIlroy wrote:

> I'd like to have a function f such that, when f is invoked, a Tk
> window w is presented in which a number of variables can be modified,
> and f returns the values that are indicated by the relevant
> menus/checkbuttons/etc at the time w gets closed. I've tried various
> ways of doing this, without success. Any assistance would be greatly
> appreciated.

does the approach described here work for you?

    http://www.pythonware.com/library/tkinter/introduction/dialog-windows.htm

(note that the tkSimpleDialog module is included in Python's standard library)

if it doesn't work, what doesn't work as required/expected?

</F> 





From steven.bethard at gmail.com  Mon Feb 21 00:03:58 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 20 Feb 2005 22:03:58 -0700
Subject: python2.4 generator expression > python2.3 list expression
In-Reply-To: <mailman.2882.1108961815.22381.python-list@python.org>
References: <mailman.2882.1108961815.22381.python-list@python.org>
Message-ID: <fOKdnT9VOKEk9oTfRVn-rg@comcast.com>

snacktime wrote:
> I need to convert a generator expression to a list expression so it
> will work under python 2.3.
> 
> I rewrote this:
> 
> for c in range(128):
>   even_odd = (sum(bool(c & 1<<b) for b in range(8))) & 1
> 
> As this:
> 
> for c in range(128):
>   bo = [bool(c & 1<<b) for b in range(8)]
>   even_odd = sum(bo) & 1
> 
> Seems to work, is there a better way to do this?

Well, if you were happy with your generator expression, you can use 
almost exactly the same syntax:

for c in range(128):
   even_odd = (sum([bool(c & 1<<b) for b in range(8)])) & 1

No need for the 'bo' variable...

STeVe


From onurb at xiludom.gro  Mon Feb  7 11:04:54 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Mon, 07 Feb 2005 17:04:54 +0100
Subject: overwriting method in baseclass
In-Reply-To: <Xns95F64CD37EEF7cpl19ghumspamgourmet@195.20.224.116>
References: <Xns95F64CD37EEF7cpl19ghumspamgourmet@195.20.224.116>
Message-ID: <420791a7$0$17127$626a14ce@news.free.fr>

Harald Massa wrote:
> Hello!
> 
> I am using a library (= code of so else) within Python. Somewhere in this 
> library there is:
> 
(snip)
> 
> 
> now I want to change the common baa-method. so that
> 
(snip)

> Of course, I use a Python- and GPL-Licence compatible library, I can 
> change the source of foo, and use my changed library.
> 
> But someday, it happened before, there will be an update by the publisher 
> to that library.... and I have to do all again.
> 
> So, what is the most elegant solution to administer these changes? 

<ot>
Use a version control system (svn is quite fine...).
</ot>

-- 
bruno desthuilliers
ruby -e "print 'onurb at xiludom.gro'.split('@').collect{|p| 
p.split('.').collect{|w| w.reverse}.join('.')}.join('@')"
--


From dan.eloff at gmail.com  Wed Feb 23 18:50:16 2005
From: dan.eloff at gmail.com (Dan Eloff)
Date: Wed, 23 Feb 2005 15:50:16 -0800
Subject: Dynamically pass a function arguments from a dict
Message-ID: <opsmoch20bcq4h53@rr-22.mshome.net>

You can take a dictionary of key/value pairs and pass it to a function as  
keyword arguments:

def func(foo,bar):
	print foo, bar

args = {'foo':1, 'bar':2}

func(**args)

will print "1 2"

But what if you try passing those arguments to a function

def func2(bar,zoo=''):
	print bar, zoo

How can you determine that func2 will only accept
bar and zoo, but not foo and call the function with
bar as an argument?

I know CherryPy does this, but it's not obvious from the source
how they pulled it off.

-Dan




From axel at straschil.com  Wed Feb  2 15:49:07 2005
From: axel at straschil.com (Axel Straschil)
Date: Wed, 2 Feb 2005 20:49:07 +0000 (UTC)
Subject: Generating modul classes with eval
Message-ID: <slrnd02f71.94e.axel@m2.sine>

Hello!

I was fooling around with creating classes for a module with eval,
something like:

MyModule.py:

class Base:
	init(self, name):
		self._name = name

for myclass in ['A', 'B', 'C']:
	code="class %s(Base):\n\tinit(self, name='%s')\n\t\tsuper(%s,
	self).__init(name=name)\n"%dict(myclass, myclass.lower(), myclass())
	... codeop and eval stuff ...
a=A()
print a

that gives: <class '__main__.A'>, but I want MyModule.A ;-)

Can someone give me a hint how to create classes in a module with eval
and codeop so that they exist like the code was written in?

Thanks, 
AXEL.



From beliavsky at aol.com  Mon Feb 28 12:51:55 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 28 Feb 2005 09:51:55 -0800
Subject: naming convention for scalars, lists, dictionaries ...
Message-ID: <1109613115.760962.292360@z14g2000cwz.googlegroups.com>

Since Python does not have declarations, I wonder if people think it is
good to name function arguments according to the type of data structure
expected, with names like "xlist" or "xdict".



From steve at holdenweb.com  Wed Feb  2 17:33:35 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 02 Feb 2005 17:33:35 -0500
Subject: Getting a module's byte code, how?
In-Reply-To: <420153cb$0$28984$e4fe514c@news.xs4all.nl>
References: <42014e25$0$28975$e4fe514c@news.xs4all.nl>
	<pan.2005.02.02.22.06.22.395829@freelance-developer.com>
	<420153cb$0$28984$e4fe514c@news.xs4all.nl>
Message-ID: <bEcMd.102642$Jk5.69613@lakeread01>

Irmen de Jong wrote:

> Mark Nenadov wrote:
> 
>> On Wed, 02 Feb 2005 23:03:17 +0100, Irmen de Jong wrote:
>>
>>
>>> What would be the best way, if any, to obtain
>>> the bytecode for a given loaded module?
>>>
>>> I can get the source:
>>> import inspect
>>> import os
>>> src = inspect.getsource(os)
>>>
>>> but there is no ispect.getbytecode()  ;-)
>>>
>>> --Irmen
>>
>>
>>
>> The inspect API documentation says that code objects have "co_code", 
>> which
>> is a string of raw compiled bytecode.
>>
>> Hope that helps!
> 
> 
> Not very much, sorry. Because we now changed the problem into:
> "how to obtain the code object from a module".
> 
> 
> Perhaps a bit of background is in order.
> For Pyro, I'm sending module byte codes across the
> wire if the other side needs it (the mobile code feature).
> However, this only works for modules that can be loaded
> from a file on disk (because I'm now reading the .pyc file
> that belongs to the module). When the receiving end in turn
> calls another Pyro object, it may have to send the module's
> bytecode again-- but that is no longer possible because the
> module has no associated file anymore! (It is considered to
> be a builtin module)
> But because it is *loaded*, there must be some way to get
> to the bytecodes, right?
> 
I'm not sure why you think the module's code would be needed once it's 
been executed. That assigns all necessary code blocks to the functions 
defined therein, so the code, once the import has been executed, is 
garbage (from the interpreter's rather process-centric view of things).

The module will, however, have a __file__ attribute, which should allow 
you to retrieve the code as mentioned in my previous post - a .pyc file, 
it appears, is just a four-byte magic number, a four-byte timestamp and 
a marshalled code object.

Of course there's no guarantee that the module has been loaded from a 
compiled file. In that case your only option is to read in the source 
and compile it.

I am presuming that this feature of Pyro won't allow a 2.3 system to 
talk to a 2.4 one, since the byte codes are incompatible.

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005          http://www.python.org/pycon/2005/
Steve Holden                           http://www.holdenweb.com/


From farcepest at gmail.com  Thu Feb 17 21:42:11 2005
From: farcepest at gmail.com (Andy Dustman)
Date: 17 Feb 2005 18:42:11 -0800
Subject: MYSQL - how to install ?
In-Reply-To: <1108684689.617676.213510@g14g2000cwa.googlegroups.com>
References: <1108547199.260223.211450@f14g2000cwb.googlegroups.com>
	<1108556905.444394.210020@l41g2000cwc.googlegroups.com>
	<1108562949.825258.297260@f14g2000cwb.googlegroups.com>
	<mailman.2686.1108564423.22381.python-list@python.org>
	<1108635996.165520.132960@o13g2000cwo.googlegroups.com>
	<1108684689.617676.213510@g14g2000cwa.googlegroups.com>
Message-ID: <1108694531.062496.19020@g14g2000cwa.googlegroups.com>

There's a Windows package for MySQL-4.1.9 and Python-2.4 on SourceForge
now, thanks to Michal Zylinski.

https://sourceforge.net/project/showfiles.php?group_id=22307&package_id=15775&release_id=303257



From jelleferinga at gmail.com  Tue Feb  1 10:53:54 2005
From: jelleferinga at gmail.com (jelle)
Date: 1 Feb 2005 07:53:54 -0800
Subject: pythonic equivalent of Mathematica's    FixedPoint   function
Message-ID: <1107273234.276714.272890@z14g2000cwz.googlegroups.com>

I now some hostility to functional programming is flaming up now and
then; still could someone suggest me a pythonic equivalent for
Mathematica's FixedPoint function? For those not familiar with
Mathematica:

FixedPoint[f, expr] starts with expr, then applies f repeatedly until
the result no longer changes.

thanks, jelle.



From bpeng at rice.edu  Fri Feb  4 19:53:46 2005
From: bpeng at rice.edu (Bo Peng)
Date: Fri, 04 Feb 2005 18:53:46 -0600
Subject: changing local namespace of a function
In-Reply-To: <11082ntjhddo357@corp.supernews.com>
References: <cu0lru$8ik$1@joe.rice.edu> <11082ntjhddo357@corp.supernews.com>
Message-ID: <cu15eq$lso$1@joe.rice.edu>

Jeff Shannon wrote:
> 
> This sounds to me like you're trying to re-implement object orientation.
> 

I have no control over the big dictionaries. All I need to do is 
processing them in situ --- that is to say, go into each map and 
manipulate numbers. Parameter passing should be avoid whenever possible 
since involved number of items are huge.

It is basically like

   exec 'statements' in d

but a function with local dictionary d would be best.

Bo


From michele.simionato at gmail.com  Wed Feb  9 11:54:52 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 9 Feb 2005 08:54:52 -0800
Subject: porting from Tkinter to pygtk
Message-ID: <1107968092.413408.89010@c13g2000cwb.googlegroups.com>

I am in the process of learning pygtk and I would like to port
some custom made Tkinter widgets to pygtk, just an exercise.
For instance I have this code:

. from Tkinter import *
.
. class AnimatedLabel(Label):
.     def __init__(self, master, text, width=72, maxspc=16, deltat=100,
**kw):
.         self.text = text
.         self.width = width
.         self.maxspc = maxspc
.         self.deltat = deltat
.         self.stringvar = StringVar(master)
.         self.stringvar.set(text)
.         self.stop = False
.         Label.__init__(self, master, textvariable=self.stringvar,
**kw)
.
.     def startAnimation(self, spaces='', addspace=False):
.         if len(spaces) == 0 or len(spaces) == self.maxspc:
.             addspace = not addspace
.         if addspace: # add a space
.             spaces += ' '
.         else: # remove a space
.             spaces = spaces[1:]
.         if not self.stop: # repeat each 100 ms changing spaces and
addspace
.
self.stringvar.set(spaces.join(self.text).center(self.width))
.             self.after(self.deltat, self.startAnimation, spaces,
addspace)
.
.     def stopAnimation(self):
.         self.stop = True
.
.
. if __name__ == "__main__":
.     t = Tk()
.     t.title('Example')
.     t.config(background='green')
.
.     a = AnimatedLabel(t, text="Hello", fg='blue', bg='green')
.     a.pack()
.     a.startAnimation()
.     t.mainloop()

what's the equivalent of the .after() method in pygtk?
BTW, is there any intro to pygtk thought for Tkinter users?
TIA,

             Michele Simionato



From deetsNOSPAM at web.de  Wed Feb 16 11:24:46 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 16 Feb 2005 17:24:46 +0100
Subject: ZODB performance (was Re: low-end persistence strategies?)
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>	<37h194F50j4pkU1@individual.net>
	<7xfyzwehq7.fsf@ruckus.brouhaha.com>	<37h2keF5a2ijjU1@individual.net>
	<f03f4fdf05021607103339fe7@mail.gmail.com>
	<mailman.2693.1108568044.22381.python-list@python.org>
Message-ID: <37hadqF5dvnheU1@individual.net>

> Chris (or anyone else), could you comment on ZODB's performance? I've
> Googled around a bit and haven't been able to find anything concrete, so
> I'm really curious to know how ZODB does with a few hundred thousand
> objects.
 
> Specifically, what level of complexity do your ZODB queries/searches have?
> Any idea on how purely ad hoc searches perform? Obviously it will be
> affected by the nature of the objects, but any insight into ZODB's
> performance on large data sets would be helpful. What's the general ratio
> of reads to writes in your application?

This is a somewhat weak point of zodb. Zodb simply lets you store arbitrary
object graphs. There is no indices created to access these, and no query
language either. You can of course create indices yourself - and store them
as simply as all other objects. But you've got to hand-tailor these to the
objects you use, and create your querying code yourself - no 4gl like sql
available.

Of course writing queries as simple predicates evaluated against your whole
object graph is straightforward - but unoptimized.

The retrieval of objects themselves is very fast - I didn't compare to a
rdbms, but as there is no networking involved it should be faster. And of
course no joins are needed.

So in the end, if you have always the same kind of queries that you only
parametrize and create appropriate indices and hand-written "execution
plans" things are nice.

But I want to stress another point that can cause trouble when using zodb
and that I didn't mention in replies to Paul so far, as he explicitly
didn't want to use an rdbms:


For rdbms'ses, a well-defined textual representation of the entities stored
in the db is available. So while you have to put some effort on creating on
OR-mapping (if you want to deal with objects) that will most likely evolve
over time, migrating the underlying data usually is pretty straightforward,
and even toolsupport is available. Basically, you're only dealing with
CSV-Data that can be easily manipulated and stored back.

ZODB on the other side is way easier to code for - but the hard times begin
if you have a rolled out application that has a bunch of objects inside
zodb that have to be migrated to newer versions and possibly changed object
graph layouts. This made me create elaborate yaml/xml serializations to
allow for im- and exports and use with xslt and currently I'm investigating
a switch to postgres.

This point is important, and future developments of mine will take that into
consideration more than they did so far.

-- 
Regards,

Diez B. Roggisch


From b at b.b  Sun Feb 13 15:55:58 2005
From: b at b.b (Roose)
Date: Sun, 13 Feb 2005 20:55:58 GMT
Subject: builtin functions for and and or?
Message-ID: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>

I need this a lot: a one line way to do a n-ary and or 'or'.

e.g.,

result = True
for x in L:
  if not boolean_function(x):
    result = False

or

>>> reduce(operator.__and__, [boolean_function(x) for x in L)

So usually I just write a little function any( L, boolean_function =
identity ) or all( ... ).  But I am kind of sick of doing that all the
time -- does it exist anywhere in the Python libraries?  It seems really
common to me.

The first way isn't satisfactory because it takes so many lines for what is
essentially one "primitive" operation.  The second way isn't great because
it is not as readable and many readers don't like to see reduce, even if it
is a common idiom like that.  Also I don't believe it short circuits.







From ed-no at spam-eepatents.com  Mon Feb 14 12:35:27 2005
From: ed-no at spam-eepatents.com (Ed Suominen)
Date: Mon, 14 Feb 2005 09:35:27 -0800
Subject: Scan document pages to a compressed PDF
Message-ID: <p_WdnW4O8bHNfI3fRVn-ow@centurytel.net>

I'd like to write a Python-based commandline tool that will scan pages with
SANE, applying CCITT Group 4 compression during scanning, and produce a
single PDF file. I would release it under GPL. Right now, I'm relying on a
workable but inflexible shell script that pipes stuff between scanimage,
tiffcp, tiff2ps, and ps2pdf.

What's the best way currently to do CCITT4 compression (e.g., of
intermediate TIFF-format images) from Python? PIL doesn't seem to support
CCITT4 compression, and the read-only patch [1] that's available won't help
in my case. I'd like to incorporate as much as possible into the Python
code and imported packages, rather than relying on pipes to a bunch of
external programs.

Same question regarding SANE -- I can't seem to find the supposed PIL
support for SANE in the release on my system. Anyone know about that, or
alternatives?

---
Ed Suominen
Registered Patent Agent
Open-Source Software Author (yes, both...)
Web Site: http://www.eepatents.com

[1] http://mail.python.org/pipermail/image-sig/2003-July/002354.html


From fredrik at pythonware.com  Sun Feb 20 12:29:53 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 20 Feb 2005 18:29:53 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>	<42172136$0$27576$9b622d9e@news.freenet.de>	<cv7i57$d0v$1@usenet.otenet.gr>	<42185b05$0$15460$9b622d9e@news.freenet.de>	<cv9sdo$69n$3@usenet.otenet.gr>	<42189527$0$6260$9b622d9e@news.freenet.de>	<cvadcj$mqc$1@usenet.otenet.gr><mailman.2866.1108917759.22381.python-list@python.org>
	<cvafgu$2lk$1@usenet.otenet.gr>
Message-ID: <cvah7m$ko7$1@sea.gmane.org>

Ilias Lazaridis wrote:

> I understand.

no.

</F> 





From marc.poulhies at NO-SP44Mepfl.ch  Tue Feb  1 03:44:11 2005
From: marc.poulhies at NO-SP44Mepfl.ch (=?iso-8859-1?Q?Marc_Poulhi=E8s?=)
Date: Tue, 01 Feb 2005 09:44:11 +0100
Subject: Using HTTPSConnection and verifying server's CRT
References: <41fe5357@epflnews.epfl.ch> <ctlmds$g64$2@nobel.pacific.net.sg>
	<41fe5fb7@epflnews.epfl.ch>
Message-ID: <41ff4157@epflnews.epfl.ch>

Marc Poulhi?s <marc.poulhies at NO-SP4Mepfl.ch> writes:

> ngps at netmemetic.com (Ng Pheng Siong) writes:

>> M2Crypto does server cert verification. With M2Crypto's httpslib, you pass
>> in an SSL.Context instance to the HTTPSConnection constructor to configure
>> the SSL; one of the config knobs is cert verification. So, redo your test,
>> satisfy yourself that this is doable, and send me your code to include as
>> an example in the distribution. ;-)

Hi again!

So here are few lines that do server's CRT check. I still have one
question: see in the code. Both have the exact same description on
the documentation.

Btw, thanks for your answer (this will save me from using Perl!)
 Marc

---8<-------8<-------8<-------8<----
#!/usr/bin/env python
import M2Crypto

ctx = M2Crypto.SSL.Context()

## what are the diff between these two??
#ctx.load_verify_info(cafile="/tmp/ca.crt")
ctx.load_verify_locations(cafile="/tmp/ca.crt")

# load client certificate (used to authenticate the client)
ctx.load_cert("/tmp/client.crt")

# stop if peer's certificate can't be verified
ctx.set_allow_unknown_ca(False)

# verify peer's certificate
ctx.set_verify(M2Crypto.SSL.verify_peer, 1)

con = M2Crypto.httpslib.HTTPSConnection("my.ssl.server.domain",ssl_context=ctx)

con.request("GET" , "/")
print con.getresponse().read()
---8<-------8<-------8<-------8<-----

Result here:
$ ./ssl_peer_verif.py 
Enter passphrase:
send: 'GET / HTTP/1.1\r\nHost: my.ssl.server.domain:443\r\nAccept-Encoding: identity\r\n\r\n'
reply: 'HTTP/1.1 200 OK\r\n'
header: Date: Tue, 01 Feb 2005 08:41:51 GMT
header: Server: Apache/2.0.46 (Red Hat)
header: Last-Modified: Mon, 31 Jan 2005 14:50:50 GMT
header: ETag: "4297-13-24658680"
header: Accept-Ranges: bytes
header: Content-Length: 19
header: Connection: close
header: Content-Type: text/html; charset=UTF-8
THIS IS WORKING =)


From caleb1 at telkomsa.net  Tue Feb  8 23:15:59 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Tue, 08 Feb 2005 23:15:59 -0500
Subject: Choosing the right parser for parsing C headers
References: <1107861023.254610.14310@g14g2000cwa.googlegroups.com>
	<JR8Od.58261$K7.15138@fe2.news.blueyonder.co.uk>
Message-ID: <opslwwsxpl1js0xs@news.telkomsa.net>

Jean, Paddy

I use "pym" to extract bits of pascal out of delphi code for documentation  
purposes.  You have to add some stuff to the delphi code (in your case, C  
header), but these are added within comment blocks, and the interesting  
thing is that you add python code(!) as a kind of dynamic markup which pym  
executes while parsing the file.

In other words, you can write python code within a comment block in your  
C-header to generate unit-tests into other files, and get that code  
executed with pym.

Keep well
Caleb


On Tue, 08 Feb 2005 19:58:33 GMT, Paddy McCarthy <paddy3118x at netscape.net>  
wrote:

> Jean de Largentaye wrote:
>> Hi,
>>  I need to parse a subset of C (a header file), and generate some unit
>> tests for the functions listed in it. I thus need to parse the code,
>> then rewrite function calls with wrong parameters. What I call "shaking
>> the broken tree" :)
>> I chose to make my UT-generator in Python 2.4. However, I am now
>> encountering problems in choosing the right parser for the job. I
>> struggle in choosing between the inappropriate, the out-of-date, the
>> alpha, or the too-big-for-the task...
>
> Why not see if the output from a tags file generator such as ctags or  
> etags will do what you want.
>
> I often find that some simpler tools do 95% of the work and it is easier  
> to treat the other five percent as broken-input.
>
> try http://ctags.sourceforge.net/
>
>
> - Paddy.



From http  Fri Feb 25 02:41:31 2005
From: http (Paul Rubin)
Date: 24 Feb 2005 23:41:31 -0800
Subject: web status display for long running program
References: <509534af.0502241737.5f62992@posting.google.com>
	<uvudnX-pwMGcCIPfRVn-iw@powergate.ca>
	<1109316391.203166.119700@z14g2000cwz.googlegroups.com>
Message-ID: <7x8y5dnl1w.fsf@ruckus.brouhaha.com>

"Kamilche" <klachemin at comcast.net> writes:
> I was inspired to enhance your code, and perform a critical bug-fix.
> Your code would not have sent large files out to dialup users, because
> it assumed all data was sent on the 'send' command. I added code to
> check for the number of bytes sent, and loop until it's all gone. I
> also turned it into a class, and made it 'command' based.

That server seems to do a cpu-busy loop polling the listening socket
for incoming requests!  Ouch!  It also assumes that once it's gotten
\r\n in the input, that the entire request has been received.  If
someone is telnetting into the server typing one character at a time,
that could fool it.

I think it's better to just launch a separate thread and use
BaseHTTPServer which is already in the stdlib.


From john at grulic.org.ar  Sun Feb  6 01:39:09 2005
From: john at grulic.org.ar (John Lenton)
Date: Sun, 6 Feb 2005 03:39:09 -0300
Subject: a type without a __mro__?
In-Reply-To: <1grid1l.7goks6hh1l6yN%aleaxit@yahoo.com>
References: <1grid1l.7goks6hh1l6yN%aleaxit@yahoo.com>
Message-ID: <20050206063909.GA5414@grulic.org.ar>

On Sat, Feb 05, 2005 at 11:37:10AM +0100, Alex Martelli wrote:
> Can anybody suggest where to find (within the standard library) or how
> to easily make (e.g. in a C extension) a type without a __mro__, except
> for those (such as types.InstanceType) which are explicitly recorded in
> the dispatch table copy._deepcopy_dispatch...?

would this do what you need?

    class C(type):
      def __getattribute__(self, attr):
        if attr == '__mro__':
          raise AttributeError, "What, *me*, a __mro__? Nevah!"
        return super(C, self).__getattribute__(attr)

    class D(object):
      __metaclass__ = C

instances of D have a type that behaves as if it didn't have a
__mro__. This isn't exactly what you asked for, but it might be
enough.

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
El tiempo cura los dolores y las querellas porque cambiamos. Ya no somos la
misma persona.
		-- Blaise Pascal. (1600-1662) Fil?sofo y escritor franc?s. 
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From simoninusa2001 at yahoo.co.uk  Thu Feb 17 02:31:17 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 16 Feb 2005 23:31:17 -0800
Subject: Pausing a program - poll/sleep/threads?
Message-ID: <1108625477.222091.34680@l41g2000cwc.googlegroups.com>

I'm writing a PyQt network client for XMMS, using the InetCtrl plugin,
that on connection receives a track length.

To save on bandwidth, I don't want to be continually querying the
server for updates (e.g. has the current track finished yet?) so I
figured the best thing to do is just update after the track length has
expired.

So, how would I make a Python program automatically call a function
after a preset period of time, without the Python process running in
the foreground (effectively single-tasking)?

I think that sleep() would work in the foreground (kind of like a while
loop does, I've come across that issue with wxPython!) does Python have
any polling capabilities?

What about threading - if I launched a thread to just "wait" until a
time has expired, could I then get that thread to make the main program
call a function, or would the main program sit there waiting for the
thread to end? I really have no experience with threads in Python, any
hints/tutorials, the docs are pretty limited?

I'm looking to make this program cross-platform, it has to run on at
least Windows and Linux (hopefully MacOSX too) so the solution would
have to be portable (does Windows even have threading without POSIX?)

If you want to check out what I've done so far (GUI, track info,
controls etc.) you'll need XMMS, http://inetctrl.sourceforge.net and my
source from http://www.the-jedi.co.uk/downloads/xmmsclient there's also
some Windows binaries built with the Cygwin/KDE port.

[InetCtrl seems to segfault if you don't have a playlist loaded, so
load a playlist first, then enable the general plugin. I must submit a
bug report to the author, maybe I could convince him to broadcast when
a track ends...]

Any help would be excellent, as playlist support and these "timed
updates" are about all that's left needing to be done....



From fredrik at pythonware.com  Wed Feb  2 16:01:42 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 2 Feb 2005 22:01:42 +0100
Subject: Crude statistics on the standard library
References: <41fe5fc7$0$29873$636a15ce@news.free.fr>
Message-ID: <ctrf27$6so$1@sea.gmane.org>

F. Petitjean wrote:

>  sre_compile and sre_parse should be coded with a __all__ attribute

they're implementation modules, and shouldn't be used by user code.

</F> 





From fuzzyman at gmail.com  Wed Feb  2 08:02:40 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 2 Feb 2005 05:02:40 -0800
Subject: Save the Canvas!
In-Reply-To: <mailman.1745.1107339310.22381.python-list@python.org>
References: <e5063e96.0502011615.2d182c77@posting.google.com>
	<mailman.1745.1107339310.22381.python-list@python.org>
Message-ID: <1107349360.258600.131850@f14g2000cwb.googlegroups.com>

Not that funny !               ;-)
Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From cam.ac.uk at mh391.invalid  Sun Feb 20 13:44:03 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sun, 20 Feb 2005 18:44:03 +0000
Subject: introspection inquiry
In-Reply-To: <4218CCF1.1050601@jessikat.fsnet.co.uk>
References: <1108910710.985704.264430@c13g2000cwb.googlegroups.com>
	<4218A579.2060503@jessikat.fsnet.co.uk>
	<cvaaae$77q$1@gemini.csx.cam.ac.uk>
	<4218CCF1.1050601@jessikat.fsnet.co.uk>
Message-ID: <cvalpm$n3$1@gemini.csx.cam.ac.uk>

Robin Becker wrote:
> import inspect
> class A:
>   _class_name=inspect.currentframe().f_code.co_name
>   def __init__(self,text,_defining_class_name=_class_name):
>     print 'text=',text,'_defining_class_name=',_defining_class_name
> 
> class B(A):
>   pass
> b=B('aaa')

That won't work, if you, say, wanted to print out the name of the
class the constructor was defined in for a whole chain of
constructors. Which is about the only case I can think of where
this would be useful.

> could work as well, but if we only need the local name why not just 
> insert directly.

To be honest, that is what I have done every time I have needed
something like this.

I've only used metaclasses in production code once and I still debate
whether that case is a good idea or not.
-- 
Michael Hoffman


From richie at entrian.com  Tue Feb  8 10:56:18 2005
From: richie at entrian.com (Richie Hindle)
Date: Tue, 08 Feb 2005 15:56:18 +0000
Subject: ANN: Zeus Programmers Editor V3.94
In-Reply-To: <4208D147.5040405@mediapulse.com>
References: <4207843C.26FB@zeusedit.com> <4208D147.5040405@mediapulse.com>
Message-ID: <5snh01hn4hlf1515su8rs5m366lghobsu2@4ax.com>


[Jussi]
> The latest release of the Zeus for Windows programmer's
> editor is now available.

[Gabriel]
> So is this mentioned here on the Python mailing list because Zeus was 
> written in Python, or is this just targeted spam for a commerical product?

>From the features page:

> o Syntax highlighting for C\C++, Clipper, Cobol, Fortran, Java, Pascal, Perl, Python, PHP, SQL etc 
> o Fully Scriptable using the Python, Lua or SmallC, VB Script, Java Script, Ruby Script languages 
> o Integrated debugger supports the Java, Perl, Python and C# languages 

IMHO that makes it of general interest to Python programmers.  Whether or
not it's a commercial product seems irrelevant.  For myself, announcements
of Python-related products, whether free or commercial, are welcome here
(though python-announce / c.l.p.a might be a better place, from the point
of view of both readers and announcers).

-- 
Richie Hindle
richie at entrian.com



From The2ndspiketoo at webtv.zzn.com  Fri Feb  4 03:14:06 2005
From: The2ndspiketoo at webtv.zzn.com (Lisa Horton)
Date: 4 Feb 2005 00:14:06 -0800
Subject: Learning Python for a new beginner
Message-ID: <1107504846.923502.185700@c13g2000cwb.googlegroups.com>

I hear that Python is one of the easiest languages to learn. It is
easier than PHP or Pearl? Is it as useful as those two? I am attracted
to Python as a first language, but I just want to be sure I will be
able to use it.

Opinions, thoughts, thanks!



From tim.leeuwvander at nl.unisys.com  Thu Feb  3 07:23:45 2005
From: tim.leeuwvander at nl.unisys.com (Leeuw van der, Tim)
Date: Thu, 3 Feb 2005 13:23:45 +0100
Subject: Crashing Python interpreter! (windows XP, python2.3.4, 2.3.5rc1,
	2.4.0)
Message-ID: <BF88DF69D9E2884B9BE5160DB2B97A8544B0D3@nlshl-exch1.eu.uis.unisys.com>


> 
> 
> -----Original Message-----
> From: python-list-bounces+tim.leeuwvander=nl.unisys.com at python.org on behalf of John Machin
> Sent: Thu 2/3/2005 12:00 PM
> To: python-list at python.org
> Subject: Re: Crashing Python interpreter! (windows XP, python2.3.4, 2.3.5rc1,2.4.0)
>  
> 
> Leeuw van der, Tim wrote:
> >
> >> > Do you have a file called drwtsn32.log anywhere on your computer?
> >
> > No, unfortunately I cannot find such file anywhere on my computer....
> >
> > What do I do to get such file? Or anything equally useful?
> >
> 
> On my Windows 2000 box, just crash something :-)
> 
> 
> Perhaps this may help:
> 
> http://www.windowsnetworking.com/kbase/WindowsTips/Windows2000/RegistryTips/RegistryTools/DrWatson.html
> 

Using this URL, I found the log file and it's about 1Gb big... I'll have to find out what is the useful part of it (or remove it and crash again). I don't know why searching all drives using windows 'search' did not find the file!

When I have a usefull crashdump, what should I do? Attach to e-mail and post it here? Should I include the user.dmp file too?

Should I do the same for both python 2.3.5r1 and python 2.4? Or is it sufficient to do so for Python 2.4?


Thanks for the assistance!

--Tim


> -- 


From pierre.barbier at cirad.fr  Wed Feb  2 02:27:02 2005
From: pierre.barbier at cirad.fr (Pierre Barbier de Reuille)
Date: Wed, 02 Feb 2005 08:27:02 +0100
Subject: type of simple object
In-Reply-To: <1107261198.943087.80960@z14g2000cwz.googlegroups.com>
References: <1107255752.258025.50870@z14g2000cwz.googlegroups.com>
	<1107257264.146280.89560@c13g2000cwb.googlegroups.com>
	<1107258136.815344.145380@c13g2000cwb.googlegroups.com>
	<tyfy8e8lcef.fsf@pcepsft001.cern.ch>
	<1107261198.943087.80960@z14g2000cwz.googlegroups.com>
Message-ID: <42008044$0$14171$626a14ce@news.free.fr>

ajikoe at gmail.com a ?crit :
> Thank you guys.
> 
> My function should multiply every element  of a list, for example
> "something"
> and "something" can be an integer or another list.
> If it deals with integer than it is ok, but
> If it deals with list than it become false for example list*2 =
> listlist, and what I really want is to mutlitply its member.
> That's why I need to know the type of my data in "something".

As stated by another comment, I would do something like :

def multiply(object, factor):
   try:
     return [ multiply(i,factor) for i in object ]
   except TypeError:
     return object*factor

This function will, recursively multiply a nested list of numbers by 
"factor" ...

> 
> By the way I am new in python, I heard that it has a MatLab
> capabilities, How good is that? Since It would be very nice when we can
> do what MatLab do in python.....

I think you are referring to the Numeric or the numarray modules. They 
offer matric computations close to chat Matlab offers. "numarray" is the 
newer version of "Numeric", but in case of small matrix, it performs 
slower (for various reasons). Then, you can find lots of information on 
the net concerning these two modules.

> 
> 
> Sincerely Yours,
> pujo
> 

Pierre


From removethis.kartic.krishnamurthy at gmail.com  Thu Feb  3 06:59:36 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Thu, 03 Feb 2005 11:59:36 GMT
Subject: errors 
In-Reply-To: <mailman.1777.1107380851.22381.python-list@python.org>
References: <mailman.1777.1107380851.22381.python-list@python.org>
Message-ID: <ImoMd.18469$8H2.2826@twister.nyroc.rr.com>

Joel Eusebio said the following on 2/2/2005 4:53 PM:
> Can someone help me on this, I don' know where the "testmptest" came from
> but the mptest.py is at the /usr/local/apache2/htdocs/test directory and
> this error came from apache's error_log
> 
> PythonHandler mod_python.publisher: ImportError: No module named testmptest
> 
> Thanks,
> 
> Joel

I found this link from Googling -
http://www.modpython.org/pipermail/mod_python/2004-January/014857.html

Please read the entire thread and see if it provides your resolutions 
(the mod_python OP's issue was similar but for a different module).

It might also do you some good to join mod_python mailing list if you 
are going to use it regularly.

Thanks,
-Kartic


From deetsNOSPAM at web.de  Wed Feb 16 10:11:42 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 16 Feb 2005 16:11:42 +0100
Subject: Test for structure
References: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
Message-ID: <37h64qF5ck38lU3@individual.net>

import types

v = []
if type(v) is types.ListType:
     pass


-- 
Regards,

Diez B. Roggisch


From http  Thu Feb  3 19:35:33 2005
From: http (Paul Rubin)
Date: 03 Feb 2005 16:35:33 -0800
Subject: CGI and HTTP Header Location redirects
References: <mailman.1854.1107476842.22381.python-list@python.org>
Message-ID: <7xk6ppyxey.fsf@ruckus.brouhaha.com>

Derek Basch <dbasch at yahoo.com> writes:
> Also, after enabling suEXEC on the apache server the script executes
> perfectly with the redirect. Can anyone explain this behavior? I
> would guess that it is related to apache user rights but I can't
> find any reference to such problems via Google.

Apache probably isn't able to run the cgi because of lack of exec
permission or something like that.  The best way to diagnose such
probs is by checking the apache error log, if you have access to it.

Best newsgroup for this type of question is
comp.infosystems.www.servers.unix.  Lots of apache experts hang out there.


From macrocosm at fastmail.fm  Thu Feb 17 20:45:27 2005
From: macrocosm at fastmail.fm (Arich Chanachai)
Date: Thu, 17 Feb 2005 20:45:27 -0500
Subject: [Fwd: Re: [Uuu-devel] languages] <-- Why Python
In-Reply-To: <86vf8qhcql.fsf@guru.mired.org>
References: <mailman.2781.1108677768.22381.python-list@python.org>	<1108678805.542584.171930@z14g2000cwz.googlegroups.com>	<mailman.2783.1108679758.22381.python-list@python.org>	<864qgaisoq.fsf@guru.mired.org>	<mailman.2785.1108689484.22381.python-list@python.org>
	<86vf8qhcql.fsf@guru.mired.org>
Message-ID: <421548B7.9030904@fastmail.fm>

Mike Meyer wrote:

>Arich Chanachai <macrocosm at fastmail.fm> writes:
>  
>
>>Mike Meyer wrote:
>>    
>>
>>>Arich Chanachai <macrocosm at fastmail.fm> writes:
>>>      
>>>
>>>>These last two points kind of diverge from the point, no?  What I mean
>>>>is that we want to present the argument of why Python is the best
>>>>choice as THE built-in programming language for the revolutionary uuu
>>>>operating system.
>>>>        
>>>>
>>>A new operating system shouldn't be picking "THE" built-in programming
>>>language. It should instead be providing mechanisms to allow arbitrary
>>>programming languages to be used wherever they are required. Tying the
>>>users of the OS - or of some application - down to a specific language
>>>is a disservice to the developers and users of that OS or application.
>>>
>>>While Python is an excellent language, and has a nice implementation
>>>for embedding/extending applications, it's not necessarily the best
>>>choice for all problems. You're be doing much better for your users to
>>>allow them to choose the right language for the problem than to
>>>dictate the language that has to be used.
>>>
>>>      
>>>
>>There is no intention to dictate, but instead to provide
>>out-of-the-box, built-into-the-architecture support for a single
>>language or a wide array of languages.  For now, this will begin with
>>a single language and the question is merely which one.
>>    
>>
>
>Whatever the intentions may be, the *act* is one of dictation. Since
>the point of the underlying OS is to increase the interconnections
>between applications (assuming I've found the correct web page and
>interpreted it correctly), the underlying architecture should be
>language-neutral. That allows as many applications as possible to play
>in the environment.
>
>I did this with CORBA (see http://www.mired.org/home/mwm/scripting/ )
>just to show that Unix can play in this arena as well as various
>desktop OS's. Plan 9 provides a much better mechanism that allows any
>programming language that can do file I/O to be used for building
>interconnections.
>
>        <mike
>  
>
When the CLR is integrated, it will allow a wide array of problem 
solving choices for uuu users.


From claird at lairds.us  Wed Feb 23 20:08:03 2005
From: claird at lairds.us (Cameron Laird)
Date: Thu, 24 Feb 2005 01:08:03 GMT
Subject: kill a process in XP
References: <cvi3i9$161k$1@news.uit.no>
	<mailman.2971.1109178189.22381.python-list@python.org>
Message-ID: <05lve2-b6p.ln1@lairds.us>

In article <mailman.2971.1109178189.22381.python-list at python.org>,
Dave Brueck  <dave at pythonapocrypha.com> wrote:
>Tor Erik S?nvisen wrote:
>>>From my Python-program I spawn a new process. When using P_NOWAIT spawnl 
>> returns the pid but in windows it returns a process handle.
>> Later I want to kill this process. How can I do this when I only have the 
>> process handle?
>
>Try ctypes - if it's really a Windows handle, then this should work:
>
>from ctypes import *
>windll.kernel32.TerminateProcess(h, 0) # or whatever return code you want
>
>-Dave

I sometimes am so irritated with attendant portability issues
that I open a channel between parent and child, which I use to
send an exit-now message.


From cam.ac.uk at mh391.invalid  Sun Feb 20 11:02:20 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sun, 20 Feb 2005 16:02:20 +0000
Subject: introspection inquiry
In-Reply-To: <cvabeq$2vo$01$1@news.t-online.com>
References: <1108910710.985704.264430@c13g2000cwb.googlegroups.com>
	<4218A579.2060503@jessikat.fsnet.co.uk>
	<cvaaae$77q$1@gemini.csx.cam.ac.uk>
	<cvabeq$2vo$01$1@news.t-online.com>
Message-ID: <cvacaf$bgj$1@gemini.csx.cam.ac.uk>

Diez B. Roggisch wrote:
 >[Michael Hoffman]:
>>Unless I misunderstood the question, that won't work. That will
>>give you the name of the class the object is an instance is of.
>>I think he wants the name of the class the method was defined in.
> 
> Where is the difference? The method is defined in a class - and an instance
> is created from that class.
> 
> This works as expected:
> 
> class ExistentialCrisis:
>     def __init__(self, text):
>         self.spam = text
>         print 'In the constructor of the %s class' % self.__class__.__name__
> 
> 
> ExistentialCrisis("egal")

Yes, but this doesn't work if you have a subclass:

"""
class ExistentialCrisisSubclass(ExistentialCrisis):
     def __init__(self, text):
         print "New constructor"
         ExistentialCrisis.__init__(self, text)

ExistentialCrisisSubclass("whoa")
"""

gives you:

New constructor
In the constructor of the ExistentialCrisisSubclass class

But the second line is *not* in the constructor of
ExistentialCrisisSubclass, it is in the constructor of ExistentialCrisis.

while I read the original post as saying that he wanted
"ExistentialCrisis" there instead. Indeed this example

-- 
Michael Hoffman


From mogmios at mlug.missouri.edu  Thu Feb  3 12:35:21 2005
From: mogmios at mlug.missouri.edu (Michael)
Date: Thu, 03 Feb 2005 09:35:21 -0800
Subject: global variables
In-Reply-To: <3YSdnYVEmOCW8pzfRVn-sg@comcast.com>
References: <1107385488.822768.317250@l41g2000cwc.googlegroups.com>	<1107388493.465599.140480@g14g2000cwa.googlegroups.com>
	<3YSdnYVEmOCW8pzfRVn-sg@comcast.com>
Message-ID: <420260D9.6060806@mlug.missouri.edu>


> Probably naming it something other than 'globals' would be a good idea 
> -- otherwise you'll hide the builtin globals() function.
> But I agree that the attributes of a class instance (as you suggest) 
> or the attributes of a module (as Steve Holden suggests) is probably 
> the right way to go.

I like to use 'runtime' or 'runtime_options' to store the results of 
command-line options. I wasn't sure about this way of getting Python to 
handle global variables when I first tried it but after a little 
experience with it I think it works out pretty well. One thing I did 
learn though is that it's best to keep these modules simple. Don't make 
them import or define classes or functions if you can avoid it. It's 
easy to get into a mess of recursive imports if you start doing that. 
Just a good newbie tip.

***
if runtime.verbose: print 'Something happened.'
***

--
Michael <mogmios at mlug.missouri.edu>
http://kavlon.org



From walter at livinglogic.de  Fri Feb 18 14:18:28 2005
From: walter at livinglogic.de (=?ISO-8859-15?Q?Walter_D=F6rwald?=)
Date: Fri, 18 Feb 2005 20:18:28 +0100
Subject: unicode encoding usablilty problem
In-Reply-To: <opsmepfmcx6yt6e7@news.cisco.com>
References: <opsmekm2ei6yt6e7@news.cisco.com>	<mailman.2811.1108751132.22381.python-list@python.org>
	<opsmepfmcx6yt6e7@news.cisco.com>
Message-ID: <42163F84.8070701@livinglogic.de>

aurora wrote:

 > [...]
> In Java they are distinct data type and the compiler would catch all  
> incorrect usage. In Python, the interpreter seems to 'help' us to 
> promote  binary string to unicode. Things works fine, unit tests pass, 
> all until  the first non-ASCII characters come in and then the program 
> breaks.
> 
> Is there a scheme for Python developer to use so that they are safe 
> from  incorrect mixing?

Put the following:

import sys
sys.setdefaultencoding("undefined")

in a file named sitecustomize.py somewhere in your Python path and
Python will complain whenever there's an implicit conversion between
str and unicode.

HTH,
    Walter D?rwald


From sharidas at zeomega.com  Sat Feb  5 02:18:23 2005
From: sharidas at zeomega.com (Satchidanand Haridas)
Date: Sat, 05 Feb 2005 12:48:23 +0530
Subject: EDI x12 --> XML
In-Reply-To: <4203CDF9.1060505@novasyshealth.com>
References: <4203CDF9.1060505@novasyshealth.com>
Message-ID: <4204733F.8040408@zeomega.com>

Hi,

In case you weren't aware of the pyx12 project on sourceforge.  The 
project summary on sourceforge.net  
(http://sourceforge.net/projects/pyx12/) says the following and I quote:

"pyx12 is a python based ANSI X.12 to XML EDI translator and validator. 
It is designed to be a step in the conversion of a X12 transaction to 
back-end database process. It can convert to and from an XML 
representation of the X12 document. "

fyi.


thanks,
Satchit


----
Satchidanand Haridas (sharidas at zeomega dot com)

ZeOmega (www.zeomega.com)
Open  Minds' Open Solutions

#20,Rajalakshmi Plaza,
South End Road,
Basavanagudi,
Bangalore-560 004, India



Greg Lindstrom wrote:

> Hello, List-
>
> I am working on automating a system accepting input data in EDI x12 
> format and would like to convert it to XML.  Before I start, I thought 
> I'd ask if anyone has worked on such a beast.  I have seen work by 
> Chris Cioffi on parsing EDI records.  Is anything else out there 
> before I either write one or use one that I have written in Perl?
>
> Thanks!
> --greg--
>
> Greg Lindstrom               501 975.4859
> Computer Programmer          greg.lindstrom at novasyshealth.com
> NovaSys Health
> Little Rock, Arkansas
>
> "We are the music makers, and we are the dreamers of dreams."  W.W.
>
>


From peter at engcorp.com  Sun Feb 27 15:36:54 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sun, 27 Feb 2005 15:36:54 -0500
Subject: default value for list access?
In-Reply-To: <cvt92e$fkj$1@joe.rice.edu>
References: <cvsumh$7i2$1@joe.rice.edu> <cvt92e$fkj$1@joe.rice.edu>
Message-ID: <huqdnXh59cf7sr_fRVn-pw@powergate.ca>

Bo Peng wrote:
> The data is the count of something, for example a[90]=10. a may be a 
> dictionary if the range is huge and a list when the range is reasonably 
> small. In the dictionary case, I can use a.setdefault(80, 0) if key 80 
> does not exist. In the list case, I have to check the length of list 
> before I access it (or use exception).
> 
> This becomes troublesome when I need to do the following a lot.
> 
>   b = a[80][1] + a[80][2] + a[80][3]
> 
> If I use the getItem function in my previous email, it will look like
> 
>   b = getItem(getItem(a, 80, []), 1, 0) + getItem(getItem(a, 80, []), 2, 
> 0) + getItem(getItem(a, 80, []), 3, 0)
> 
> What would be the best solution to handle this? 

Sounds to me like the best solution is to simplify the implementation
and dispense with the list alternative.  Why use a list if a dictionary
is suitable?  Don't say performance: that's premature optimization.
Dictionaries already have what you need, apparently, with setdefault(),
so just use them and keep the code simple.

...
> but I am afraid that a for loop would bring serious performance problem.

More premature optimization?  The first rule of programming should be
to make it work.  Then consider making it faster, but only if it is
really unacceptably slow.  (Some would say to make it work, then make
it "right", then make it fast.  In this case, "right" doesn't mean
"correct" (that's the first step), it means making it clean and simple.
Doing it this way makes sense only if you have a really good test
suite developed along with the code, ala test-driven development.
Lacking that, you should focus on "right" and working together,
which in this case suggests leaving out the complicated list option.)

-Peter


From ncoghlan at iinet.net.au  Sat Feb 26 02:00:24 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 26 Feb 2005 17:00:24 +1000
Subject: Code evaluation at function definition execution time (was Re:
 Compile time evaluation (aka eliminating default argument hacks))
In-Reply-To: <KZ6dnTQd0MfWfYLfRVn-hA@comcast.com>
References: <mailman.2997.1109243714.22381.python-list@python.org>	<ceGdnSLOHIvbfIDfRVn-jg@comcast.com>	<mailman.3074.1109381674.22381.python-list@python.org>
	<KZ6dnTQd0MfWfYLfRVn-hA@comcast.com>
Message-ID: <42201E88.8070803@iinet.net.au>

Steven Bethard wrote:
> Worth looking at is the thread:
> 
> http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/58f53fe8bcc49664/ 

Huh - I thought I put something in the original post saying "without resorting 
to bytecode hacks", but I must have deleted it before sending the message.

Anyway, that thread is what the comment about bytecode hacks would have been 
referring to :)

Although, once the AST compiler goes in, if the AST for a function is attached 
via a special attribute like __ast__, then perhaps such manipulations could be 
rewritten to work on the AST instead of the bytecode. If that happens, they 
might become less hackish.

So I guess I should wait and see what the next few months holds in terms of 
AST-hacks :)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From ericjardim at gmail.com  Thu Feb 10 21:17:33 2005
From: ericjardim at gmail.com (Eric Jardim)
Date: 10 Feb 2005 18:17:33 -0800
Subject: PyQt documentation
Message-ID: <1108088253.552834.44690@z14g2000cwz.googlegroups.com>

Hi,

Is there any site that gather all the documentation about PyQt?

The docs of the Riverbank site is poor, and I have found separate
tutorials on the net.

I know that the Kompany have made a "Qtdoc"-like to PyQt. But it is not
free doc.

Does anybody know anything about any project for making PyQt
development more easy?

thanks,

[Eric Jardim]



From nick at craig-wood.com  Fri Feb 18 05:30:01 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 18 Feb 2005 10:30:01 GMT
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<mailman.2735.1108616299.22381.python-list@python.org>
	<1108622622.119311.43200@f14g2000cwb.googlegroups.com>
	<mailman.2746.1108629315.22381.python-list@python.org>
	<1108629775.800508.3400@f14g2000cwb.googlegroups.com>
	<mailman.2777.1108674138.22381.python-list@python.org>
	<1108702957.327528.22010@z14g2000cwz.googlegroups.com>
	<mailman.2790.1108704152.22381.python-list@python.org>
	<1108707658.105102.298300@z14g2000cwz.googlegroups.com>
Message-ID: <slrnd1bg3q.ipo.nick@irishsea.home.craig-wood.com>

Michele Simionato <michele.simionato at gmail.com> wrote:
>  Ok, I have yet another question: what is the difference
>  between fcntl.lockf  and fcntl.flock? The man page of
>  my Linux system says that flock is implemented independently
>  of fcntl, however it does not say if I should use it in preference
>  over fcntl or not.

flock() and lockf() are two different library calls.

With lockf() you can lock parts of a file.  I've always used flock().

>From man lockf() "On Linux, this call [lockf] is just an interface for
fcntl(2). (In general, the relation between lockf and fcntl is
unspecified.)"

see man lockf and man flock

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


From helten0007 at yahoo.com  Sat Feb 26 07:57:20 2005
From: helten0007 at yahoo.com (Pete.....)
Date: Sat, 26 Feb 2005 13:57:20 +0100
Subject: Making a calendar
Message-ID: <422071d5$0$22691$ba624c82@nntp04.dk.telia.net>

Hi all.

I'm trying to make a calendar for my webpage, python and html is the only 
programming languages that I know, is it possible to make such a calendar 
with pythong code and some html.

The Idea is that when I click the link calendar on my webpage, then the user 
will be linked to the calendar.

The calendar should show one month at the time, and the user should be able 
to browse to the other month.

I will make a script that puts events and such into a db ( I know how to do 
this)

Then I need a script that puts the events from the db into the calendar, if 
every day in the calendar has a value id that part will not be hard.

What I need is a script that generates the calender, in such a way that each 
month will be have a value, and that the user then can click the days to see 
more info about the events.

I was thinking something like the iMPcal calender: 
http://www.heidgerken.org/impcal2/calendar.php

Is there any modules I can use, or does any of you hardcore programmers have 
some advice on how I should proceed with this little project of mine :)

Thanks




From gsakkis at rutgers.edu  Fri Feb 11 18:08:54 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: Fri, 11 Feb 2005 18:08:54 -0500
Subject: check if object is number
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
	<374ho0F560ughU1@individual.net>
	<66WdnbJbuf5yj5DfRVn-iA@comcast.com>
	<374lklF5b20klU1@individual.net>
	<Rbydncek9t43qZDfRVn-sQ@comcast.com>
Message-ID: <374s89F58hlbrU1@individual.net>

> > So what you're saying is that 3 <= "3.0" should not be allowed, but
> > 3 <= SomeUserDefinedNumericClass(3) is ok, although your program knows
> > nothing a priori about SomeUserDefinedNumericClass. The idea suggested
> > before, try if "x+1" fails or not does not get you far; any class that
> > overrides __add__ may fool this test:
> >
> > class Dummy:
> >     def __add__(self,other):
> >         return 0
>
> Right but by the same logic, we can fool protocols that are builtin to
> Python:
>
> py> class C(object):
> ...     def __iter__(self):
> ...         return 0
> ...
> py> for x in C():
> ...     print x
> ...
> Traceback (most recent call last):
>    File "<interactive input>", line 1, in ?
> TypeError: iter() returned non-iterator of type 'int'
>
> I'm not trying to catch the case where someone is deliberately violating
> the protocol.  Only the case where they've provided an object that
> doesn't conform to the protcol.

Note however that in my example there's no TypeError; 0 (or any value for that matter) is perfectly
valid for __add__, while __iter__ must return an iterator.

> Clearly, complex objects don't conform to the protocol I want -- they
> don't support comparisons to ints.  This is easy to check:
>
> try:
>      x <= 1
> except TypeError:
>      raise TypeError('%s does not support comparisons to ints' %
>                      type(x).__name__)
>
> Now str objects also don't conform my protocol -- they aren't comparable
> to integers in any meaningful sense.  Ideally, I should be able to use
> the same code as above for str objects (and get a TypeError like "str
> objects cannot be compared with int objects"), but unfortunately, the
> Python wart of cross-type default comparisons gets in the way.  I look
> forward to the day when Python 3.0 removes such comparisons.  =)

Me too... the way comparison works as of now is error-prone, to say the least. Comparing ints with
strings is no more valid than adding them, and python (correctly) raises TypeError for the latter,
but not for the former. For the record, here's the arbitrary and undocumented (?) order among some
main builtin types:

>>> None < 0 == 0.0 < {} < [] < ""  < ()
True

George




From c00lways at gmail.com  Wed Feb  9 22:15:15 2005
From: c00lways at gmail.com (James)
Date: Thu, 10 Feb 2005 11:15:15 +0800
Subject: wxgrid multiline cell editor
Message-ID: <420ad1b9$1_2@news.tm.net.my>

wxpython 2.5.3

hi,

anyone know how to make a multiline cell editor for wxgrid?
thank you :)

best regards,

James


From tim.peters at gmail.com  Sat Feb  5 17:04:54 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Sat, 5 Feb 2005 17:04:54 -0500
Subject: pickle/marshal internal format 'life expectancy'/backward
	compatibility
In-Reply-To: <1107640264.7097.5.camel@localhost>
References: <1107640264.7097.5.camel@localhost>
Message-ID: <1f7befae05020514046ab10822@mail.gmail.com>

[Philippe C. Martin]
> I am looking into using the pickle format to store object/complex data
> structures into a smart card as it would make the design of the embedded
> application very simple.
>
> Yet the card might have to stay in the pocket of the customer for a few
> years, during which the back office application responsible for
> retrieving the information from the card might evolve as well as the
> python release it relies upon.
>
> Is there a commitment for python releases to be able to interpret
> 'older' pickle/marshal internal formats ?

Pickle and marshal have nothing in common, and there's no
cross-release guarantee about marshal behavior.  Pickles are safe in
this respect; indeed, each Python released to date has been able to
load pickles created by all earlier Python releases.  Of course a
pickle produced by a later Python may not be loadable by an earlier
Python, although even in that direction you can get cross-release
portability by forcing the newer Python to restrict itself to produce
obsolete pickle formats.  Reading Lib/pickletools.py in a current
release will explain all this.


From atulhi at gmail.com  Mon Feb 14 11:17:15 2005
From: atulhi at gmail.com (atulhi at gmail.com)
Date: 14 Feb 2005 08:17:15 -0800
Subject: Python C API version mismatch for module pytspc ---Gyach voice chat
	problems
Message-ID: <1108397835.145767.138280@o13g2000cwo.googlegroups.com>

I've been having some problems with gyach, when trying to open the
PyVoice chat portion of it.

Following error is received

*******************************************************************************
/usr/local/share/gyach/pyvoice/pytsp.py:2: RuntimeWarning: Python C API
version mismatch for module pytspc: This Python has API version 1012,
module pytspc has version 1011.
  import pytspc
/usr/local/share/gyach/pyvoice/pyvoiceui.py:161: DeprecationWarning:
use gtk.UIManager
  itemf=ItemFactory(MenuBar, "<main>", ag)
/usr/local/share/gyach/pyvoice/pyvoiceui.py:264: DeprecationWarning:
use gtk.TreeView
  self.nmlist=CList(3,[' I ',' '+_('Name')+' ',' '+_('Alias')+' '])
/usr/local/share/gyach/pyvoice/pyvoiceui.py:298: Warning: unsupported
arithmetic operation for flags type
  prevtable.attach( tvolbox, 1, 2, 0, 1, (EXPAND+FILL), (0), 0, 0)
Traceback (most recent call last):
  File "/usr/local/share/gyach/pyvoice/pyvoiceui.py", line 1027, in ?
    runApp()
  File "/usr/local/share/gyach/pyvoice/pyvoiceui.py", line 1015, in
runApp
    pyvoicegui()
  File "/usr/local/share/gyach/pyvoice/pyvoiceui.py", line 298, in
__init__
    prevtable.attach( tvolbox, 1, 2, 0, 1, (EXPAND+FILL), (0), 0, 0)
TypeError: flag values must be strings, ints or tuples
*******************************************************************************

Would appreciate if someone can help in this regard



From ajsiegel at optonline.com  Sat Feb 12 14:34:13 2005
From: ajsiegel at optonline.com (Arthur)
Date: Sat, 12 Feb 2005 14:34:13 -0500
Subject: Newbie needs help with canvas.create_image !
References: <b5f9523.0502120915.1a93d23@posting.google.com>
	<mailman.2448.1108229554.22381.python-list@python.org>
Message-ID: <8pls0110ssdlap2p9n0uudq7d865tbmbsc@4ax.com>

On Sat, 12 Feb 2005 18:24:11 +0100, "Fredrik Lundh"
<fredrik at pythonware.com> wrote:

>Antti Isomursu wrote:
>
>> With code below I get a red box with given width and height. When I
>> use that create_image, nothing happens. I only see that same red box.
>> Why is that?
>> The loop.bmp is working fine when I use show() method.
>>
>>        win = Toplevel()
>>
>>        canvas = Canvas(win, width=100, height=100, background='red')
>>        canvas.pack()
>>
>>        im = Image.open("loop.bmp")
>>        photo = ImageTk.PhotoImage(im)
>>
>>        canvas.create_image(8, 8, anchor="nw", image=photo)
>
>the problem might be that the PhotoImage is garbage collected before being
>displayed.  see the note on the bottom of this page for details:
>
>    http://effbot.org/zone/tkinter-photoimage.htm
>
></F> 

I had run into this for the first time recently as well.

and found this tutor thread helped.

http://starship.python.net/pipermail/python-de/2002q4/002834.html

Declaring "im" as global is one way to go (there I said it). In fact,
IMO, probably the clearest (though not the prettiest) way to go under
under the circumstances.  

I don't think anyone is particularly defending the circumstances. I
have heard the circumstances described as a bug, and the various
"solutions"  are perhaps better thought of as work-arounds.

Art






From pyguy2 at gmail.com  Mon Feb 28 11:29:37 2005
From: pyguy2 at gmail.com (pyguy2 at gmail.com)
Date: 28 Feb 2005 08:29:37 -0800
Subject: Python - what is the fastest database ?
In-Reply-To: <1109592623.116661.101880@g14g2000cwa.googlegroups.com>
References: <1109592623.116661.101880@g14g2000cwa.googlegroups.com>
Message-ID: <1109608177.789067.106390@f14g2000cwb.googlegroups.com>

It depends on what you mean by database.

If you want really fast I/O,  try pytables.
"PyTables is a hierarchical database package designed to efficiently
manage very large amounts of data."

http://pytables.sourceforge.net/html/WelcomePage.html

some more comments from the webpage:

# High performance I/O: On modern systems, and for large amounts of
data, tables and array objects can be read and written at a speed only
limited by the performance of the underlying I/O subsystem. Moreover,
if your data is compressible, even faster than your I/O maximum
throughput (!).

# Support of files bigger than 2 GB: So that you won't be limited if
you want to deal with very large datasets. In fact, PyTables support
full 64-bit file addressing even on 32-bit platforms (provided that the
underlying filesystem does so too, of course).

# Architecture-independent: PyTables has been carefully coded (as HDF5
itself) with little-endian/big-endian byte orderings issues in mind .
So, you can write a file in a big-endian machine (like a Sparc or MIPS)
and read it in other little-endian (like Intel or Alpha) without
problems.

# Portability: PyTables has been ported to many architectures, namely
Linux, Windows, MacOSX, FreeBSD, Solaris, IRIX and probably works in
many more. Moreover, it runs just fine also in 64 bit plaforms (like
AMD64, Intel64, UltraSparc or MIPS RXX000 processors).



From tjreedy at udel.edu  Wed Feb 16 13:52:42 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 16 Feb 2005 13:52:42 -0500
Subject: [EVALUATION] - E02 - ULTIMATE RECIPE TO RESOLVE ALL ISSUES
References: <cuo71l$gig$1@usenet.otenet.gr> <cuv1st$6um$1@swifty.westend.com>
Message-ID: <cv04ko$gcs$1@sea.gmane.org>


"Peter Maas" <peter at somewhere.com> wrote in message 
news:cuv1st$6um$1 at swifty.westend.com...
> http://nobelprize.org/medicine/educational/pavlov/
>
> and then do something useful :)

Thanks.  I showed this to my daughter, who enjoyed the game, and explained 
your point re Pavlov posting, and about Pavlov advertising, etc.  She then 
went on to some of the other games.  A good home-learning tool.

Terry J. Reedy





From john_sips_teaz at yahooz.com  Tue Feb  8 11:32:05 2005
From: john_sips_teaz at yahooz.com (John M. Gabriele)
Date: Tue, 08 Feb 2005 11:32:05 -0500
Subject: Is Python as capable as Perl for sysadmin work?
In-Reply-To: <cu9k87$d80$1@panix2.panix.com>
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
	<cu9k87$d80$1@panix2.panix.com>
Message-ID: <110hqc5gu943d89@corp.supernews.com>

Aahz wrote:
> [snip]
> 
> Anyway.  Have you ever noticed how shell scripts keep getting longer?

Yup.

> Ever notice how it gets harder to figure out what the heck any given
> script's doing?

Yup.

>  Well, that's where Python helps you out compared to
> Perl.  Python can be a bit clumsier than Perl for dirt-simple tasks, but
> you'll find that Python scales much better than Perl.

Check. Thanks Aahz. :)

--
-- remove zees if contacting via email --


From peter at engcorp.com  Fri Feb 25 21:58:04 2005
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 25 Feb 2005 21:58:04 -0500
Subject: web status display for long running program
In-Reply-To: <7x8y5dnl1w.fsf@ruckus.brouhaha.com>
References: <509534af.0502241737.5f62992@posting.google.com>
	<uvudnX-pwMGcCIPfRVn-iw@powergate.ca>
	<1109316391.203166.119700@z14g2000cwz.googlegroups.com>
	<7x8y5dnl1w.fsf@ruckus.brouhaha.com>
Message-ID: <ffWdncvtEbsmeILfRVn-gg@powergate.ca>

Paul Rubin wrote:
> "Kamilche" <klachemin at comcast.net> writes:
> 
>>I was inspired to enhance your code, and perform a critical bug-fix.
>>Your code would not have sent large files out to dialup users, because
>>it assumed all data was sent on the 'send' command. I added code to
>>check for the number of bytes sent, and loop until it's all gone. I
>>also turned it into a class, and made it 'command' based.
> 
> That server seems to do a cpu-busy loop polling the listening socket
> for incoming requests!  Ouch!  

Not likely, as the socket is blocking by default.  It won't
use any CPU at all until a connection arrives.

> It also assumes that once it's gotten
> \r\n in the input, that the entire request has been received.  

Which is perfectly correct given the OP's specifications,
which were that he simply wanted to hit "Refresh" in his
browser to get a new page.  Note also it's \r\n\r\n, not
just a single one.

> If someone is telnetting into the server typing one character at a time,
> that could fool it.

Fool it how?  We're not talking actual data transfer, just
a simple HTTP request which ends its header section with
the aforementioned sequence, guaranteed.

> I think it's better to just launch a separate thread and use
> BaseHTTPServer which is already in the stdlib.

Very likely.... of course, that wouldn't be any fun. ;-)

-Peter


From M.Waack at gmx.de  Mon Feb 14 15:13:21 2005
From: M.Waack at gmx.de (Mathias Waack)
Date: Mon, 14 Feb 2005 21:13:21 +0100
Subject: 64 bit Python
Message-ID: <1cd7e2-qu7.ln1@valpo.de>

Hi, 

one of my colleagues got some trouble with a program handling large
amounts of data. I figured out that a 32 bit application on HP-UX
cannot address more than 1 GB of memory. In fact (I think due to the
overhead of memory management done by python) a python application
cannot use much more than 500 MB of "real" data. For this reason
I've created a 64 bit version of python 2.3.5. I've tested a simple
C program before to make sure its able to address the whole
available memory (8 GB main memory and about 12 GB swap). The simple
example in C works, but the python script didn't. I was able to
create only 2 GB of python objects. The application occupied
approximately 2.2 GB of memory. After that, python failed with a
memory error. 

Is there any internal restriction on the size of the heap? 

Mathias


From mcfletch at rogers.com  Fri Feb 18 12:50:09 2005
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Fri, 18 Feb 2005 12:50:09 -0500
Subject: Probably over my head... Trying to get Font Names
In-Reply-To: <8oydnSIY04Xby4jfRVn-iA@adelphia.com>
References: <B8KdneiuyLaKoYjfRVn-vQ@adelphia.com>	<mailman.2786.1108689703.22381.python-list@python.org>
	<8oydnSIY04Xby4jfRVn-iA@adelphia.com>
Message-ID: <42162AD1.50105@rogers.com>

[Samantha: your email has been bouncing, might want to clear your inbox]

Samantha wrote:

>Thanks Mike. I must have not installed the ttfquery and font tools 
>correctly. I get an error. This error:
>  
>
...

>ImportError: No module named fontTools
>
>Like I said I think I am way in over my short head.
>S
>  
>
Does look as though you missed getting FontTools installed.  You realise
it's a separate package from TTFQuery, right?

    http://sourceforge.net/projects/fonttools/

You'll have to do the standard:

    python setup.py install

to get it installed on your system.

HTH,
Mike

________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com
                              PyCon is coming...




From andymac at bullseye.apana.org.au  Tue Feb  8 06:10:31 2005
From: andymac at bullseye.apana.org.au (Andrew MacIntyre)
Date: Tue, 08 Feb 2005 21:10:31 +1000
Subject: Problems with python and threads under Freebsd
In-Reply-To: <1f060c4c05020721333542e5ee@mail.gmail.com>
References: <mailman.2101.1107803855.22381.python-list@python.org>	<cu8p1f$g9n$1@online.de>
	<1f060c4c05020720136cf5b3f@mail.gmail.com>
	<1f060c4c05020721333542e5ee@mail.gmail.com>
Message-ID: <42089E27.6080806@bullseye.apana.org.au>

snacktime wrote:
> After debugging this some more I narrowed it down to an encryption
> function in pycrypto that is triggering the segfault.  I posted a bug
> report.  Don't really know enough about threading to know whether it's
> a python bug or a pycrypto bug, but I'll let someone else sort that
> out now..

If you get bus errors, there's a possibility that you are running out of 
stack.

AFAIR, the default thread stack size for Posix builds is dependant on 
the threading implementation.  This can be overridden when building Python.

With each gcc version since 2.9, the size of stack frames for generated 
calls has increased.  If lowering the optimisation to -O or -Os when 
building Python improves the situation, I'd suggest pursuing this 
possibility further.

-------------------------------------------------------------------------
Andrew I MacIntyre                     "These thoughts are mine alone..."
E-mail: andymac at bullseye.apana.org.au  (pref) | Snail: PO Box 370
         andymac at pcug.org.au             (alt) |        Belconnen ACT 2616
Web:    http://www.andymac.org/               |        Australia


From Scott.Daniels at Acm.Org  Fri Feb  4 17:57:05 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Fri, 04 Feb 2005 14:57:05 -0800
Subject: empty classes as c structs?
In-Reply-To: <mailman.1906.1107543562.22381.python-list@python.org>
References: <mailman.1906.1107543562.22381.python-list@python.org>
Message-ID: <4203fa2a@nntp0.pdx.net>

Christopher J. Bottaro wrote:
> I find myself doing the following very often:
> 
> class Struct:
>         pass
> ...
> blah = Struct()
> blah.some_field = x
> blah.other_field = y
> ...
> 
> Is there a better way to do this?  Is this considered bad programming
> practice?  I don't like using tuples (or lists) because I'd rather use
> symbolic names, rather than numeric subscripts.  Also, I don't like having
> to declare the empty Struct class everytime I want to do this (which is
> very often).

I have a module of my own (data.py) that I use a lot. It contains:

class Data(object):
     def __init__(self, **initial):
         for name, val in initial.iteritems():
             setattr(self, name, val)

     def __repr__(self):
         names = sorted([name for name in dir(self)
                         if not name.startswith('_')],
                         key=lambda name: (name.lower(), name))
         return '%s(%s)' % (self.__class__.__name__, ', '.join([
                    '%s=%r' % (nm, getattr(self, nm)) for nm in names]))

The advantage is that I can see the value in the Data object simply
by printing the object.  I use it like:

     from data import Data

     blah = Data(some_field=3, other_field=13)
     ...
     blah.other_field = 23
     ...

--Scott David Daniels
Scott.Daniels at Acm.Org


From fumanchu at amor.org  Sat Feb  5 23:00:23 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Sat, 5 Feb 2005 20:00:23 -0800
Subject: bad generator performance
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E3398373@exchange.hqamor.amorhq.net>

Johannes Ahl mann wrote:
> i am in the process of profiling an application and noticed how much
> time my depth first generator for walking a tree data structure took.
> 
> i wrote the same thing as a recursive function producing an array, and
> this non-generator version is nearly 10 times faster!
> 
> any ideas why this is, what i did wrong...
> for some reason the generator version appears as being called 
> much more
> often than the recursive one. no idea why that is, but the data is
> definitely identical!
> 
> here the output from the python profiler and the respective code:
> 
> ### snip ###
> 
> ncalls  tottime  percall  cumtime  percall filename:lineno(function)
> 94209/8191    0.560    0.000    0.590    0.000  
> :71(depthFirstIterator2)
> 4095/1    0.060    0.000    0.080    0.080  :62(depthFirstIterator1)
> 
> ### snip ###
> 	
> def depthFirstIterator1(self, depth = 0):
>     ret = [[self, True, depth]]
> 
>     if self.isFolder():
>       for c in self.children:
>         ret = ret + c.depthFirstIterator(depth = depth + 1)
> 
>     return ret + [[self, False, depth]]
> 
> def depthFirstIterator2(self, depth = 0):
>     yield [self, True, depth]
> 
>     if self.isFolder():
>       for c in self.children:
>         for y in c.depthFirstIterator(depth = depth + 1):
>           yield y
> 
>     yield [self, False, depth]
> 
> ### snip ###
> 
> i'd appreciate any comments or explanations why the generator might be
> so much slower, as i had just decided to use generators more 
> frequently
> and in the respective PEP they are praised as generally fast.

Um. Under my definition of "recursion", you haven't really removed
recursion in the generator version. That is, you're still calling the
depthFirstIterator method upon each iteration--you've just changed from
list-concatenation to yielding instead, which trades off list-management
overhead for closure-maintenance overhead. A truly non-recursive
implementation would probably exist outside of whatever class you've got
this method in, and would keep its own pointer to the current node as it
traversed the tree.

Hope that helps,


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org


From cam.ac.uk at mh391.invalid  Sun Feb 20 07:43:49 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sun, 20 Feb 2005 12:43:49 +0000
Subject: [ANN] Python 2.4 Quick Reference available
In-Reply-To: <qnkll9kv09y.fsf@arbutus.physics.mcmaster.ca>
References: <cv79sj$mgk$1@aphrodite.grec.isp.9tel.net>
	<1108831318.290846.5930@z14g2000cwz.googlegroups.com>
	<qnkll9kv09y.fsf@arbutus.physics.mcmaster.ca>
Message-ID: <cva0m7$hrb$1@gemini.csx.cam.ac.uk>

David M. Cooke wrote:

> """
> The file() constructor is new in Python 2.2 and is an alias for
> open(). Both spellings are equivalent. The intent is for open() to
> continue to be preferred for use as a factory function which returns a
> new file object. The spelling, file is more suited to type testing
> (for example, writing "isinstance(f, file)").
> """

There was a discussion on python-dev (earlier this year IIRC) where
someone started changing the stdlib to use file() instead of open()
and the BDFL clarified what he originally wanted with file().

That said, I still use file() instead of open(). I think that:

for line in file("mytext.txt"):

makes a lot more sense than:

for line in open("mytext.txt"):

I guess it's because the first option sounds a lot more like English.

It's one of the few places where my personal style disagrees with
the "official" Python style but I just like file() so much better ;)
-- 
Michael Hoffman


From rbt at athop1.ath.vt.edu  Thu Feb 17 09:57:20 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Thu, 17 Feb 2005 09:57:20 -0500
Subject: os.walk()
In-Reply-To: <Rb2Rd.13888$G77.1043577@phobos.telenet-ops.be>
References: <cv29o3$ror$1@solaris.cc.vt.edu>
	<Rb2Rd.13888$G77.1043577@phobos.telenet-ops.be>
Message-ID: <cv2bc9$17l$1@solaris.cc.vt.edu>

Roel Schroeven wrote:
> rbt wrote:
> 
>>The problem I run into is that some of the files and dirs are not
>>removed while others are. I can be more specific and give exact examples
>>if needed. On WinXP, 'pagefile.sys' is always removed, while
>>'UsrClass.dat' is *never* removed, etc.
> 
> 
> Keep in mind that the comparisons are done case sensitive; are you sure
> that there's no problem regarding uppercase/lowercase?
> 

I've noticed that. I've tried most all combinations possible with the same results.


From noreplyme at hotmail.com  Sat Feb 19 04:48:38 2005
From: noreplyme at hotmail.com (noreplyme at hotmail.com)
Date: Sat, 19 Feb 2005 09:48:38 +0000 (UTC)
Subject: =?iso-8859-1?q?=A4=D1=A4=F4=B3=F2=A4=D1=B4I=ADb=B2=C4=A4=40=AEy?=
	=?iso-8859-1?q?=B3=E6=A6=EC=A4=C0=AF=B2=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E?=
Message-ID: <cv721m$o6f$282@news.hgc.com.hk>

?????????I?b???@?y????????
?N?b?|?I????????
???????q???q?U???n?a??
???K???K?????N?}

?{???H?G?Q?C?????@????????
?a???q???p?Z?U?@??
???????N????
???V?@?y,???V????
???????n???K????,??????100??
?q???????G?Q?C??
?????G?d??

http://www.geocities.com/tinfucourt/tinfu_plan.html
?T???G?U?????????? (plan 2)

?u???????H?K,?????H?a,
??????,?????s,?L???}???n??

???H????,?{???q?????v?????p???u?@....

???N???q?l?z?????H?????]?A ???O/?~??/???~
?? : 13556869217 at 163.com ?P???H?p??..
?????????????^??.
.............................................................................................................................................................................................................................................................................................


From rzantow at ntelos.net  Thu Feb 17 14:57:08 2005
From: rzantow at ntelos.net (rzantow at ntelos.net)
Date: 17 Feb 2005 11:57:08 -0800
Subject: win2k multiple versions config question
Message-ID: <1108670228.344749.149550@g14g2000cwa.googlegroups.com>

I currently have both 2.3 and 2.4 on my Win2k computer. For the most
part, I've been able to run each version, but I'm not configured
completely correctly and I've run into a snafu. I downloaded LGT to try
it out today; it uses PyGame (which as far as I know doesn't work with
2.4 yet -- or am I wrong here?), and OpenGL, and maybe has other
dependencies. At any rate, the error I am seeing apparently involves
OpenGL, and looks like this:

Traceback (most recent call last):
  File "D:\Dld\LGT\doc\dev_pygame.py", line 3, in ?
    import LGT
  File "..\LGT\__init__.py", line 2, in ?
    import video
  File "..\LGT\video.py", line 1, in ?
    from OpenGL.GL import *
  File "d:\Python23\lib\site-packages\OpenGL\__init__.py", line 26, in
?
    from GL.GL__init___ import __numeric_present__, __numeric_support__
  File "d:\Python23\lib\site-packages\OpenGL\GL\__init__.py", line 2,
in ?
    from GL__init__ import *
  File "d:\Python23\lib\site-packages\OpenGL\GL\GL__init__.py", line 2,
in ?
    import GL__init___
ImportError: Module use of python23.dll conflicts with this version of
Python.

I'm not sure what "this version" of Python should be here. I have a
Pythonpath that refers to the 2.3 tree; neither 2.3 nor 2.4 is
referenced in my Path variable. There is no evident reference to 2.4
active (at least not that I can find). The message seems to be telling
me that the OpenGL module uses 2.3, which should be correct, but maybe
I'm reading it wrong. Can anybody set me on the right track here?

-- 
rzed



From aahz at pythoncraft.com  Tue Feb 22 11:21:42 2005
From: aahz at pythoncraft.com (Aahz)
Date: 22 Feb 2005 11:21:42 -0500
Subject: Python UPS / FedEx Shipping Module
References: <mailman.2411.1108149803.22381.python-list@python.org>
Message-ID: <cvfm6m$dfo$1@panix3.panix.com>

In article <mailman.2411.1108149803.22381.python-list at python.org>,
Gabriel Cooper  <gabriel.cooper at mediapulse.com> wrote:
>
>I've made UPS and FedEx shipping rate request modules in python using 
>XML. Is there an interest in putting this on the web?

Yes!  My company has some similar software, and I may be able to get
permission to combine our work.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From simonwittber at gmail.com  Fri Feb 25 03:53:36 2005
From: simonwittber at gmail.com (Simon Wittber)
Date: Fri, 25 Feb 2005 16:53:36 +0800
Subject: accessor/mutator functions
In-Reply-To: <1109315698.002207.245690@g14g2000cwa.googlegroups.com>
References: <1109315698.002207.245690@g14g2000cwa.googlegroups.com>
Message-ID: <4e4a11f8050225005366f6bed5@mail.gmail.com>

> My questions are:
> a) Are the three things above considered pythonic?

Python uses a function called 'property to achieve the same effect.
This example is taken from the documentation:

    class C(object):
        def __init__(self):
            self.__x = 0
        def getx(self):
            return self.__x
        def setx(self, x):
            if x < 0: x = 0
            self.__x = x
        x = property(getx, setx)


In the above example, "C().x" would invoke and return the result of
.getx (the accessor), and "C().x = 10" would invoke .setx (the
mutator).

Are they considered Pythonic? Well, It depends on how they are used.
If you are using properties to perform some kind of type checking...
then the answer is probably No.

I've found that they are quite useful for implementing lazy evaluation
of attributes, which I would consider quite Pythonic.

Sw.


From steven.bethard at gmail.com  Thu Feb 24 14:17:38 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 24 Feb 2005 12:17:38 -0700
Subject: Mapping operator tokens to special methods
In-Reply-To: <1109271478.871224.272750@g14g2000cwa.googlegroups.com>
References: <1109271478.871224.272750@g14g2000cwa.googlegroups.com>
Message-ID: <mp6dnS5OJL3MtYPfRVn-tA@comcast.com>

jamesthiele.usenet at gmail.com wrote:
> I was starting to write a dictionary to map operator strings to their
> equivalent special methods such as:
> {
>   '+' : 'add',
>   '&' : 'and_'
> }
> 
> The idea is to build a simple interactive calculator.
> 
> and was wondering if there is already something like this builtin?
> 
> Or is there a better way to do what I want?

There's not already a mapping builtin, but you should definitely look at 
the operator module:

py> import operator
py> ops = {'+':operator.add, '&':operator.and_}
py> ops['+'](3, 2)
5
py> ops['&'](3, 2)
2

STeVe


From steven.bethard at gmail.com  Wed Feb 16 14:30:15 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 16 Feb 2005 12:30:15 -0700
Subject: Can __new__ prevent __init__ from being called?
In-Reply-To: <MoMQd.14133$4I5.775533@news20.bellglobal.com>
References: <87is4tldea.fsf@news2.ososo.de>
	<3LOdncHRa6C77I_fRVn-rA@comcast.com>
	<87acq5tos7.fsf@news2.ososo.de>
	<MoMQd.14133$4I5.775533@news20.bellglobal.com>
Message-ID: <VeOdnTkaq8bbAo7fRVn-og@comcast.com>

Colin J. Williams wrote:
> This prompts a similar query.  __new__ appears to be intended for 
> immutable objects but it seems to be called as part of constructor 
> process for all instances.

That's because Python has no builtin way of determining whether or not a 
given type is immutable.  If you wanted to, you could define both 
__new__ and __init__, the first to set immutable parts and the second to 
set mutable parts, e.g.:

py> class PartlyMutableTuple(tuple):
...     def __new__(cls, *args, **kwargs):
...         return super(PartlyMutableTuple, cls).__new__(cls, args)
...     def __init__(self, *args, **kwargs):
...         self.__dict__.update(kwargs)
...
py> t = PartlyMutableTuple(1, 2, 3, a=4, b=5)
py> t
(1, 2, 3)
py> t.a, t.b
(4, 5)
py> t.a, t.b = t.b, t.a
py> t.a, t.b
(5, 4)
py> t[0] = 2
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
TypeError: object does not support item assignment

I don't think I'd advise this strategy, but by always calling both 
__new__ and __init__, Python makes it possible...

Steve


From jeffrey at fro.man  Fri Feb  4 10:57:49 2005
From: jeffrey at fro.man (Jeffrey Froman)
Date: Fri, 04 Feb 2005 07:57:49 -0800
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
	<7xy8e5jagh.fsf@ruckus.brouhaha.com>
	<1107490052.542546.285950@c13g2000cwb.googlegroups.com>
	<7xekfwc19i.fsf@ruckus.brouhaha.com>
Message-ID: <11076rucarl7m4c@corp.supernews.com>

Paul Rubin wrote:

> I don't know that the browser necessarily renders that faster than it
> renders a table, but there's surely less crap in the HTML, which is
> always good.??I?may?start?using?that?method.

Using tables for layout is also a cardinal faux pas if you care about
accessibility, as such tables can really mess up things like screenreader
software for the sight-impaired.

Jeffrey 


From steven.bethard at gmail.com  Sun Feb  6 15:58:52 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 06 Feb 2005 13:58:52 -0700
Subject: empty classes as c structs?
In-Reply-To: <1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>
	<mailman.1973.1107618702.22381.python-list@python.org>
	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>
	<mailman.2006.1107658273.22381.python-list@python.org>
	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>
	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>
Message-ID: <4qCdnXM11-uVGJvfRVn-vQ@comcast.com>

Alex Martelli wrote:
> I think this ``view'' or however you call it should be a classmethod
> too, for the same reason -- let someone handily subclass Bunch and still
> get this creational pattern w/o extra work.  Maybe a good factoring
> could be something like:
> 
> class Bunch(object):
> 
>     def __init__(self, *a, **k):
>         self.__dict__.update(*a, **k)
> 
>     def getDict(self):
>         return self.__dict__
> 
>     def setDict(self, adict):
>         self.__dict__ = adict
> 
>     theDict = property(getDict, setDict, None, 
>                        "direct access to the instance dictionary"
>                       )
> 
>     @classmethod
>     def wrapDict(cls, adict, *a, **k):
>         result = cls.__new__(cls, *a, **k)
>         result.setDict(adict)
>         cls.__init__(result, *a, **k)
>         return result
> 
> I'm thinking of use cases where a subclass of Bunch might override
> setDict (to do something else in addition to Bunch.setDict, e.g.
> maintain some auxiliary data structure for example) -- structuring
> wrapDict as a classmethod in a ``Template Method'' DP might minimize the
> amount of work, and the intrusiveness, needed for the purpose.  (I don't
> have a real-life use case for such a subclass, but it seems to cost but
> little to provide for it as a possibility anyway).

Seems pretty reasonable -- the only thing I worry about is that 
classmethods and other attributes (e.g. properties) that are accessible 
from instances can lead to subtle bugs when a user accidentally 
initializes a Bunch object with the attributes of the same name, e.g.:

     b = Bunch(getDict=1)

where

     b.getDict()

now fails with something like "TypeError: 'int' object is not callable". 
  (For another discussion about this problem, see [1]).

I don't know what the right solution is here...  I wonder if I should 
write a classmethod-style descriptor that disallows the calling of a 
function from an instance?  Or maybe I should just document that the 
classmethods should only be called from the class?  Hmm...

How do you feel about getDict and setDict also being classmethods?


Steve

[1] http://mail.python.org/pipermail/python-dev/2005-January/051328.html


From fredrik at pythonware.com  Tue Feb 22 11:55:50 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 22 Feb 2005 17:55:50 +0100
Subject: Problem with minidom and special chars in HTML
References: <421b5b8c$1@news.uni-klu.ac.at>
Message-ID: <cvfnv7$h44$1@sea.gmane.org>

Horst Gutmann wrote:

> I currently have quite a big problem with minidom and special chars (for example &uuml;)  in HTML.
>
> Let's say I have following input file:
> --------------------------------------------------
> <?xml version="1.0"?>
> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
>             "http://www.w3.org/TR/html4/strict.dtd">
> <html>
> <body>
> &uuml;
> </body>
> </html>
> --------------------------------------------------

 > test3.html only has a blank line where should be the &uuml; It is simply
> removed.
>
> Any idea how I could solve this problem?

umm.  doesn't that doctype point to an SGML DTD?  even if minidom did fetch
external DTD's (I don't think it does), it would probably choke on that DTD.

running your documents through "tidy -asxml -numeric" before parsing them as
XML might be a good idea...

    http://tidy.sourceforge.net/ (command-line binaries, library)
    http://utidylib.berlios.de/ (python bindings)

</F> 





From grante at visi.com  Mon Feb 14 16:41:52 2005
From: grante at visi.com (Grant Edwards)
Date: 14 Feb 2005 21:41:52 GMT
Subject: parsing IMAP responses?
Message-ID: <42111b20$0$44604$a1866201@visi.com>

According to Google, the question has come up before, but there
doesn't seem to be much of an answer.

The imaplib module return values are mostly useless as-is:
they're just whatever string the server sent (or in some cases
a list of strings).  You've got to parse them using the IMAP
syntax before you can do much with them. 

Is there a library somewhere that impliments the IMAP protocol
syntax?

-- 
Grant Edwards                   grante             Yow!  Now I understand the
                                  at               meaning of "THE MOD SQUAD"!
                               visi.com            


From fuzzyman at gmail.com  Wed Feb  2 10:42:17 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 2 Feb 2005 07:42:17 -0800
Subject: CONTEST - What is the (best) solution?
In-Reply-To: <1107357151.234804.187440@g14g2000cwa.googlegroups.com>
References: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
	<1107350983.411793.146600@g14g2000cwa.googlegroups.com>
	<1107357151.234804.187440@g14g2000cwa.googlegroups.com>
Message-ID: <1107358937.315500.249620@z14g2000cwz.googlegroups.com>

What about the syntax ? Will it have commas in the right place ?
(never, always, or sometimes ? - sometimes is much worse than never or
always).

*damn* - problem is that '{' might appear as one of the values....
*So*... read the file in as a list of lines and strip each line.
Dictionaries will always start where '{' is the first character. Anyway
- you could always explicitly check if each line ends with a ',' and if
it doesn't add one...)
(*warning* UNTESTED)

>handle = open('filename', 'r')
>thefile =  handle.readlines()
>handle.close()
>
>dictindex = []
>i = 0
>while i < len(thefile)-1:
>    if line.startswith('{'):
>        dictindex.append(i)
>        i += 1
>lastdict = ' '.join(thefile[dictindex[-1]:]
>print eval(lastdict)

Checking if each line ends with a ',' (except for the last line) should
be easy !
HTH

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From python-url at phaseit.net  Tue Feb 15 00:52:45 2005
From: python-url at phaseit.net (Cameron Laird)
Date: Tue, 15 Feb 2005 05:52:45 +0000
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Feb 15)
Message-ID: <mailman.2629.1108484369.22381.python-announce-list@python.org>

QOTW:  "I've forgotten what we are arguing about, but I'm sure I'm
right." -- Jive Dadson

"I believe the best strategy against Identity theft is bad
credit." -- Tom Willis

"You can't live without unit tests.  And once you have unit tests, the
added value of declarations is tiny, and their cost remains." -- martellibot


    Make history, instead of having it happen to you:  the 
    upcoming PyPy Sprint promises to be singular:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/6f0458c61169eff1/
        
    Brian van den Broek, Roy Smith, BJ=F6rn_Lindqvist, Jason
    Diamond, and Grig Gheorghiu introduce the crucial subject
    of unit-testing in Python for those new to test-driven
    development:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/bbda0385fa4e1de7/
	http://www.onlamp.com/pub/a/python/2004/12/02/tdd_pyunit.html

    How do you know that Python has "arrived"?  When its use is
    the least interesting part of a project.  Notice that, once
    again, Python is handy in "process control", traditionally
    a domain for assembler, C, and Basic:
        http://www.linuxjournal.com/article/7403

    Philip dives deeply into Python optimization issues:
        http://dirtsimple.org/2005/02/optimization-surprises.html
	http://dirtsimple.org/2005/02/from-nine-to-five.html

    Not only does Martin Franklin provide a new TableList widget
    for Tkinter, but he clearly describes how he did so, apparently
    in the belief that such knowledge might be useful to others:
        http://mail.python.org/pipermail/tkinter-discuss/2005-February/000320.html
    Stewart Midwinter answers with a "poor-man's table widget":
        http://mail.python.org/pipermail/tkinter-discuss/2005-February/000325.html
        
    Philip Schoenborn explores RAII and related Python deli-
    cacies related to resource management--in print!
        http://ddj.com/articles/2005/0503/


========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Brett Cannon continues the marvelous tradition established by 
    Andrew Kuchling and Michael Hudson of intelligently summarizing
    action on the python-dev mailing list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    The Python Business Forum "further[s] the interests of companies
    that base their business on ... Python."
	http://www.python-in-business.org

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    deli.cio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topics/pythonurl/         
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.




From jordan2856977 at 163.com  Sun Feb  6 00:59:15 2005
From: jordan2856977 at 163.com (jordan2856977)
Date: 5 Feb 2005 21:59:15 -0800
Subject: sos!
References: <6d2e4eef.0502050342.d8744cb@posting.google.com>
	<StKdnVdY3-KK2pjfRVn-uw@rogers.com>
Message-ID: <6d2e4eef.0502052159.40c5c2f1@posting.google.com>

"Dan Perl" <danperl at rogers.com> wrote in message news:<StKdnVdY3-KK2pjfRVn-uw at rogers.com>...
> "jordan2856977" <jordan2856977 at 163.com> wrote in message 
> news:6d2e4eef.0502050342.d8744cb at posting.google.com...
> > hellow everybody! I'm from china. I'm a beginner of python. in china,
> > python is not a fashionable language, so it's difficult to find some
> > books about python. finally,I find a book named "python how to
> > program" wrote by H.M.Deitel . who can tell me where can I find some
> > interesting source code about python. otherwise, I will fell boring
> > about study!
> 
> The Python Cookbook is a good source of examples that other posters haven't 
> mentioned yet: http://aspn.activestate.com/ASPN/Cookbook/Python/
> 
> It is especially good because it contains simple, short recipes that 
> illustrate a specific use of python and these recipes are organized in 
> categories.
> 
> Dan

thanks dan


From lbates at syscononline.com  Fri Feb 11 18:33:19 2005
From: lbates at syscononline.com (Larry Bates)
Date: Fri, 11 Feb 2005 17:33:19 -0600
Subject: dos box appears when clicking .pyc
In-Reply-To: <mailman.2426.1108164378.22381.python-list@python.org>
References: <mailman.2426.1108164378.22381.python-list@python.org>
Message-ID: <4ZGdne8O2fch3ZDfRVn-oQ@comcast.com>

Change the association for .pyc files to pythonw.exe
from python.exe.

Larry Bates


Philippe C. Martin wrote:
> Hi,
> 
> 
> For a few months now, I have been used .pyc script under XP without
> getting the "DOS" box.
> 
> I just re-installed the scripts on another XP box and am now getting the
> DOS box !
> 
> Something to do with the registry ?
> 
> Regards,
> 
> Philippe
> 
> 
> 
> 
> 


From ggrp1.20.martineau at dfgh.net  Tue Feb 22 04:20:21 2005
From: ggrp1.20.martineau at dfgh.net (Martin Miller)
Date: 22 Feb 2005 01:20:21 -0800
Subject: Execute a list
References: <mailman.2921.1109059973.22381.python-list@python.org>
Message-ID: <1109064021.373300.276430@g14g2000cwa.googlegroups.com>

Here is how to execute code in a string, similar to what was shown in
your example:

>>> s = 'print "hello"'
>>> exec s
hello

Hope this helps.



From http  Thu Feb  3 13:26:05 2005
From: http (Paul Rubin)
Date: 03 Feb 2005 10:26:05 -0800
Subject: Is there a market for python developers?
References: <1107440354.317628.221090@g14g2000cwa.googlegroups.com>
Message-ID: <7x3bwdxzya.fsf@ruckus.brouhaha.com>

"Mabon Dane" <mdane at h2001.net> writes:
> I am new to python and took my first attempts at working with this
> language today.  Is there a market for people who work with Python?

Well, there's two ways to look at that question:

1) Are there many companies with with openings like "we want to hire a
Python programmer"?  The answer is yes, not a huge number, but there
aren't a huge number of Python programmers either.

2) Can using Python make you more marketable as a programmer?
Certainly it can.  You can often get things done faster in Python than
in other languages, and getting things done always helps your
marketability.  Lots of times the customer just needs to get some task
completed, and they don't care whether you use Python or some other
language.  And using Python can result in such a big productivity gain
as to really help you score points with your employer or customer.

Python is not a magic bullet and it certainly shouldn't be the only
language you know.  However, wielded skillfully, it can be a very
powerful tool.


From __peter__ at web.de  Mon Feb  7 15:39:11 2005
From: __peter__ at web.de (Peter Otten)
Date: Mon, 07 Feb 2005 21:39:11 +0100
Subject: "Collapsing" a list into a list of changes
References: <dvOMd.33656$EG1.19314@lakeread04>
	<mailman.2034.1107725421.22381.python-list@python.org>
	<cu7532$er8$01$1@news.t-online.com>
	<200502071907.12169.francis.girard@free.fr>
	<mailman.2097.1107802306.22381.python-list@python.org>
Message-ID: <cu8jlk$5v9$00$1@news.t-online.com>

John Lenton wrote:

> On Mon, Feb 07, 2005 at 07:07:10PM +0100, Francis Girard wrote:
>> Zut !
>> 
>> I'm very sorry that there is no good use case for the "reduce" function
>> in Python, like Peter Otten pretends. That's an otherwise very useful
>> tool for many use cases. At least on paper.
>> 
>> Python documentation should say "There is no good use case for the reduce
>> function in Python and we don't know why we bother you offering it."
> 
> I am guessing you are joking, right? I think Peter exaggerates when he
> says that "there will be no good use cases for reduce"; it is very
> useful, in writing very compact code when it does exactly what you
> want (and you have to go through hoops to do it otherwise). It also
> can be the fastest way to do something. For example, the fastest way
> to get the factorial of a (small enough) number in pure python is
> 
>   factorial = lambda n: reduce(operator.mul, range(1, n+1))
 
I see that you are seduced by the beauty of the expression. Otherwise, if
you would really care for speed:

$ cat factorial.py

#ugly but efficient
factorial = [1]
for i in range(1, 50):
    factorial.append(i*factorial[-1])


import operator
def factorial_reduce(n):
    return reduce(operator.mul, xrange(1, n+1), 1)

if __name__ == "__main__":
    assert factorial[0] == factorial_reduce(0) == 1
    assert factorial[5] == factorial_reduce(5) == 1*2*3*4*5

$ python2.4 -m timeit -s'import factorial as f' 'f.factorial_reduce(30)'
100000 loops, best of 3: 13.3 usec per loop
$ python2.4 -m timeit -s'import factorial as f' 'f.factorial[30]'
1000000 loops, best of 3: 0.328 usec per loop

Having factorial raise a UseStirlingsFormulaError for large values is left
as an exercise to the reader :-)


Peter



From spam at nospam.org  Fri Feb 11 15:38:28 2005
From: spam at nospam.org (Erik Johnson)
Date: Fri, 11 Feb 2005 13:38:28 -0700
Subject: Commerical graphing packages?
Message-ID: <420d1595$1@nntp.zianet.com>


    I am wanting to generate dynamic graphs for our website and would rather
not invest the time in developing the code to draw these starting from
graphics primitives. I am looking for something that is... "fairly robust"
but our needs are relatively modest: X-Y scatter plots w/ data point
symbols, multiple data set X-Y line plots, bar charts, etc.

    Preferably this would come from a company that can provide support &
decent documentation, and a package that can be installed without a bunch of
extra hassle (e.g., needs Numeric Python, needs to have the GD library
installed, needs separate JPEG encoders, font libraries, etc.)

    I am aware of ChartDirector (http://www.advsofteng.com/ ) which
explicitly supports python and seems to be about the right level of
sophistication. I don't really know of any other packages in this space, do
you? I am seeking feedback and reccomendations from people who have used
this package or similar ones. I am particularly interested to hear about any
limitations or problems you ran into with whatever package you are using.

Thanks for taking the time to read my post! :)

-ej




From simoninusa2001 at yahoo.co.uk  Sun Feb 13 19:24:42 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 13 Feb 2005 16:24:42 -0800
Subject: PyQt and Python 2.4 - also WinXP LnF?
In-Reply-To: <1108152792.710263.117650@z14g2000cwz.googlegroups.com>
References: <1108003471.242829.297030@o13g2000cwo.googlegroups.com>
	<mailman.2295.1108027117.22381.python-list@python.org>
	<1108065099.593832.314470@f14g2000cwb.googlegroups.com>
	<1108152792.710263.117650@z14g2000cwz.googlegroups.com>
Message-ID: <1108340682.521315.234620@l41g2000cwc.googlegroups.com>

After building with MSVC6 (Python 2.3.5 and 2.4 versions) I've noticed
that the ToolTips don't seem to work in the GPL version.

MSVC6 is about twice as fast to build as MinGW.....



From theller at python.net  Tue Feb  1 04:03:14 2005
From: theller at python.net (Thomas Heller)
Date: Tue, 01 Feb 2005 10:03:14 +0100
Subject: Forcing interactive interpreter without (-i)
References: <mailman.1683.1107244488.22381.python-list@python.org>
Message-ID: <r7k0hctp.fsf@python.net>

Miki Tebeka <miki.tebeka at zoran.com> writes:

> Hello All,
>
> If there a way a script can tell Python to enter interactive mode even if
> the -i command line switch was not given?
>
> I want py2exe to create an interactive session, without writing my own
> REPL.

IIRC, in newer Python versions, you can set the PYTHONINSPECT env var inside
your script.

Thomas


From jamesthiele.usenet at gmail.com  Thu Feb 24 16:19:36 2005
From: jamesthiele.usenet at gmail.com (jamesthiele.usenet at gmail.com)
Date: 24 Feb 2005 13:19:36 -0800
Subject: Mapping operator tokens to special methods
In-Reply-To: <v0gs11thcis6m6l4lb8cb95f4j2jrctdi0@4ax.com>
References: <1109271478.871224.272750@g14g2000cwa.googlegroups.com>
	<v0gs11thcis6m6l4lb8cb95f4j2jrctdi0@4ax.com>
Message-ID: <1109279976.277421.227450@l41g2000cwc.googlegroups.com>

John Machin wrote:
>>> eval('1+2') 

3 
--
Yeah, that's what I decided to do.



From mjackson at alumni.caltech.edu  Thu Feb 10 10:20:25 2005
From: mjackson at alumni.caltech.edu (Mark Jackson)
Date: 10 Feb 2005 15:20:25 GMT
Subject: negative integer division
References: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
	<cu91bf$9nk$1@news.wrc.xerox.com>
	<c76ff6fc.0502092155.53c62e29@posting.google.com>
Message-ID: <cufu3p$oo6$1@news.wrc.xerox.com>

sjmachin at lexicon.net (John Machin) writes:
> mjackson at alumni.caltech.edu (Mark Jackson) wrote in message news:<cu91bf$9nk$1 at news.wrc.xerox.com>...
> > 
> > A:  42
> > 
> > Q:  What multiple of 7 did I add to the critical expression in the Zeller
> >     algorithm so it would remain nonnegative for the next few centuries?
> 
> What are you calling "the Zeller algorithm", and what is the "critical
> expression"?

A C function in calendar.c, encountered in the source code for xvtdl:

int zeller (month, day, year)
int month, day, year;
{
  int century;
  month -= 2;       /* Years start on March 1 so adjust standard date */
  if (month < 1) {
     month += 12;
     year--;
  }
  century = year / 100;
  year = (int)year % (int)100;
  return ((int)((2.6 * month - 0.1) + day + year + year / 4  + century / 4 - century * 2) % 7);
}

The expression upon which "% 7" acts is negative when "year" is small.
This caused errors beginning in March 2000; which could be deferred by
adding a suitably-large multiple of 7 to the expression.  The choice
was obvious. :-)

> I've no doubt you came across a stuffed-up date-to-days calculation
> routine and fixed it, but it's a bit unfair to lumber Zeller with the
> blame. If it was a days-to-date routine, then Zeller is not even
> standing next to the real target.

Fair enough, although I'm not responsible for having named the function
(which appears to date from 1991).  The original author is identified
in the code (available at
http://www.alumni.caltech.edu/~mjackson/xvtdl.html) and is findable via
the Web; you might take the matter up with him.

-- 
Mark Jackson - http://www.alumni.caltech.edu/~mjackson
	People who write obscurely are either unskilled in writing
	or up to mischief.		- Sir Peter Medawar




From ods at strana.ru  Thu Feb 17 09:46:10 2005
From: ods at strana.ru (Denis S. Otkidach)
Date: Thu, 17 Feb 2005 17:46:10 +0300
Subject: Is it possible to use the logging-module in a threadless
 environment?
In-Reply-To: <5475062c.0502170541.41ec4320@posting.google.com>
References: <5475062c.0502170541.41ec4320@posting.google.com>
Message-ID: <20050217174610.012c25ec.ods@strana.ru>

On 17 Feb 2005 05:41:12 -0800
rlwm.erens at home.nl (Roger) wrote:

> I'd like to use a program (roundup) that imports the logging.config
> module on a machine where I could not get the thread and threading
> modules to compile.
> 
> How dangerous is it to changing /lib/python2.4/logging/config.py to
> something like:
> 
> import dummy_thread as thread, dummy_threading as threading

I believe it's a bug and logging/config.py should use the same approach
as logging/__init__.py do:

try:
    import thread
    import threading
except ImportError:
    thread = None

-- 
Denis S. Otkidach
http://www.python.ru/      [ru]


From kent37 at tds.net  Wed Feb 23 07:48:10 2005
From: kent37 at tds.net (Kent Johnson)
Date: Wed, 23 Feb 2005 07:48:10 -0500
Subject: unicode(obj, errors='foo') raises TypeError - bug?
In-Reply-To: <ydWdndBX1-sXrYHfRVn-vQ@comcast.com>
References: <mailman.2958.1109141791.22381.python-list@python.org>
	<ydWdndBX1-sXrYHfRVn-vQ@comcast.com>
Message-ID: <421c786a$1_1@newspeer2.tds.net>

Steven Bethard wrote:
> Mike Brown wrote:
> 
>>>>> class C:
>>
>> ...   def __str__(self):
>> ...      return 'asdf\xff'
>> ...
>>
>>>>> o = C()
>>>>> unicode(o, errors='replace')
>>
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in ?
>> TypeError: coercing to Unicode: need string or buffer, instance found
>>
> [snip]
> 
>>
>> What am I doing wrong? Is this a bug in Python?
> 
> 
> No, this is documented behavior[1]:
> 
> """
> unicode([object[, encoding [, errors]]])
>     ...
>     For objects which provide a __unicode__() method, it will call this 
> method without arguments to create a Unicode string. For all other 
> objects, the 8-bit string version or representation is requested and 
> then converted to a Unicode string using the codec for the default 
> encoding in 'strict' mode.
> """
> 
> Note that the documentation basically says that it will call str() on 
> your object, and then convert it in 'strict' mode.  You should either 
> define __unicode__ or call str() manually on the object.

Not a bug, I guess, since it is documented, but it seems a bit bizarre that the encoding and errors 
parameters are ignored when object does not have a __unicode__ method.

Kent

> 
> STeVe
> 
> [1] http://docs.python.org/lib/built-in-funcs.html


From jeff at ccvcorp.com  Fri Feb  4 18:38:15 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Fri, 04 Feb 2005 15:38:15 -0800
Subject: returning True, False or None
In-Reply-To: <pan.2005.02.04.17.42.00.550123@jerf.org>
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com> <raRMd.9382$s16.4267@trndny02>
	<mailman.1922.1107553495.22381.python-list@python.org>
	<pan.2005.02.04.17.42.00.550123@jerf.org>
Message-ID: <11081ppg3m9tt5d@corp.supernews.com>

Jeremy Bowers wrote:

> On Fri, 04 Feb 2005 16:44:48 -0500, Daniel Bickett wrote:
> 
>>[ False , False , True , None ]
>>
>>False would be returned upon inspection of the first index, even
>>though True was in fact in the list. The same is true of the code of
>>Jeremy Bowers, Steve Juranich, and Jeff Shannon. As for Raymond
>>Hettinger, I can't even be sure ;)
> 
> Nope. 

Indeed.  Similarly for mine, which was really just a slight transform 
of Jeremy's (setting a return variable directly, instead of setting a 
flag that's later used to decide what to return):

 >>> def tfn(lst):
... 	answer = None
... 	for item in lst:
... 		if item is True: return True
... 		if item is False: answer = False
... 	return answer
...
 >>> list = [False, False, True, None]
 >>> tfn(list)
1
 >>> list = [None, False, False, None]
 >>> tfn(list)
0
 >>> list = [None, None, None, None]
 >>> print tfn(list)
None
 >>> >>>

The noted logical flaw *has* been present in a number of proposed 
solutions, however.

The key point to note is that one *must* examine the entire list 
*unless* you find a True; short-circuiting on False means that you may 
miss a later True.

Jeff Shannon
Technician/Programmer
Credit International



From mt at 3planes.com  Tue Feb  1 11:29:24 2005
From: mt at 3planes.com (Michael Tobis)
Date: 1 Feb 2005 08:29:24 -0800
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<uImdnUAKxbKaFWPcRVn-2A@telcove.net>
	<1107205410.367521.50490@f14g2000cwb.googlegroups.com>
	<44SdnUZGopnrAWLcRVn-pg@telcove.net>
Message-ID: <1107275364.730411.24710@c13g2000cwb.googlegroups.com>

> How common is it for a local variable to be bound in
> more than one place within a function?

It's more natural for a beginner to read or write

.mystr = ""
.for snippet in snippets:
.   if ilike(snippet):
.      mystr = mystr + snippet

than

.mylist = []
.for snippet in snippets:
.   if ilike(snippet):
.      mylist.append(snippet)
.mystr = "".join(mylist)

for instance.

While the latter is superior in some ways, I frequently find my fingers
tossing off the former approach.

Of course in this case it's not hard to come up with

mystr = "".join([snippet in snippets if ilike(snippet)])

but it's also not too hard to imagine cases where the list
comprehension would be too complex or would require too much
refactoring.

I don't know that it's ever necessary to rebind, but it is, in fact,
common, and perhaps too easy. In numeric Python, avoiding rebinding
turns out to be a nontrivial skill. 

mt



From fredrik at pythonware.com  Tue Feb 15 16:30:48 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 15 Feb 2005 22:30:48 +0100
Subject: Font size
References: <42126822@news.comindico.com.au>
Message-ID: <cutpgr$8n8$1@sea.gmane.org>

"Adam" <adam at eden.com> wrote:

> How do you clear the screen and then display a number with an enlarged font size (about 300).

what platform?  what screen?  300 what?

</F> 





From sizelji at insightbb.com  Thu Feb 10 15:27:25 2005
From: sizelji at insightbb.com (Jim Sizelove)
Date: Thu, 10 Feb 2005 20:27:25 GMT
Subject: Python COM Makepy Excel 9.0 error
In-Reply-To: <1108062567.928124.219200@g14g2000cwa.googlegroups.com>
References: <1108062567.928124.219200@g14g2000cwa.googlegroups.com>
Message-ID: <MsPOd.31826$C24.2998@attbi_s52>

nvhengr at gmail.com wrote:
> Has anyone seen this?  When I run the COM Makepy utility and choose
> Microsoft Excel 9.0 Object Library (1.3), I get an application error
> message:
> 
> PythonWin: Pythonwin.exe - Application Error
> The instruction at "0x77fcc87" referenced memory at "0x0307a705".  The
> memory could not be "read".
> 
> I do not get this error when I choose the Microsoft Office 9.0 Object
> Library (2.1).
> 
> I have tried this from one other computer and got a similar error
> message.  I looked all over the 'net for enlightenment and have so far
> been unsuccessful.  Does anyone have an idea what can be going on and
> how to get around it?
> 
> I am using Python 2.4 under Windows 2000SP4.  I have also installed
> pywin32 (build 203 for Python 2.4) and py2exe-0.5.4 for Python 2.4.
> 
> Python 2.3 and the COM Makepy utility (Python 2.3 version) seems to run
> okay.
> 
> I am writing a rather complicated set of instructions to manipulate a
> series of Excel 2000 spreadsheets and have already added quite a few of
> the features from Python 2.4, so I hope I do not have to revert back to
> Python 2.3.  Any suggestions?
> 
> Thank you, in advance,
> Christopher D. Morgan, P.E., Ph.D.
> 
I experienced similar problems when moving some code from Python 2.3 to 
Python 2.4.  Seems that running "makepy -d ..." works.  See Mark 
Hammond's explanation at:

  http://mail.python.org/pipermail/python-win32/2004-December/002743.html
  [python-win32] WMI scripting makepy error with ActivePython 2.4.0

HTH,
Jim Sizelove


From jgkjcasey at yahoo.com.au  Tue Feb  1 19:26:23 2005
From: jgkjcasey at yahoo.com.au (JGCASEY)
Date: 1 Feb 2005 16:26:23 -0800
Subject: web camera or else ? 15-30 fps processing of camera videos.
In-Reply-To: <420006a5$0$714$c3e8da3@news.astraweb.com>
References: <1107295229.657375.318750@o13g2000cwo.googlegroups.com>
	<420006a5$0$714$c3e8da3@news.astraweb.com>
Message-ID: <1107303983.662065.93580@c13g2000cwb.googlegroups.com>


The Artist Formerly Known as Kap'n Salty wrote:
> Newbie wrote:
> > I am doing some robotics projects but my main area of interest is
> > trying out several algorithms for the processing of the stream of
data
> > coming from the video.
> >
> > I am wondering what type of camera I should invest in. Either I
could
> > buy a web cam and hope I can find a driver I could either modify or
> > use. i.e. every frame is somehow stored on the computer
automagically
> > or I could buy a camera not unlike the AVRcam
> > (http://www.jrobot.net/Projects/AVRcam.html) or the CMUcam and try
to
> > do the processing once the data has been streamed to the nearest
> > computer ? or should I use an expensive video card, some CCTV
camera
> > and a frame grabber to digitize photos so they can be processed
> > afterwards. I expect my processing algorithms to handle at least 15
> > frames per second framerate once they are working ont the final
set-up.
> >
> > My constraints are that I would like to avoid as much as possible
> > complex set-ups even if that means buying a more expensive camera
> > set-up. For the prototyping, I would like to try my algorithms out
> > using a combination of python and matlab (all very slow) and then
> > expect the same architecture (image files location and flow) with
> > speedier set-up like python+psyco or C. All the processing would be
> > done on a computer dedicated for that. Windows or Linux are
possible.
> >
>
> An easy approach to this is to use a wireless camera on your robot,
with
> the receiver attached to a frame grabber on a remote host. This
allows
> you your choice of camera (stand alone video transmitters are widely
> available), and you are not limited to only processing hardware you
can
> carry on board your robot. You also get full FPS. Frame-grabber cards

> are inexpensive and widely available for both Windows and Linux.

I wanted to go down that path but cannot get
information on how to access the images from
the tv receiver card in real time using my
own software.

Do you use Java?

John Casey



From cjw at sympatico.ca  Tue Feb  8 12:50:53 2005
From: cjw at sympatico.ca (Colin J. Williams)
Date: Tue, 08 Feb 2005 12:50:53 -0500
Subject: Definitive documentation on newstyle classes? (WAS: Pickling
 and inheritance are making me hurt)
In-Reply-To: <mailman.2002.1107653711.22381.python-list@python.org>
References: <1d6cdae305020516467620aa0@mail.gmail.com>
	<mailman.2002.1107653711.22381.python-list@python.org>
Message-ID: <4208FBFD.6000303@sympatico.ca>

Brian van den Broek wrote:
> Daniel Bickett said unto the world upon 2005-02-05 19:46:
> 
>> I was reading the "Pickling and inheritance are making me hurt"
>> thread, and the latest suggestion (as of this posting) was to do with
>> the __setstate__ and __getstate__ methods. They caught my attention
>> because I hadn't encountered them before, and it reminded me that in
>> the past I've never been able to very good, definitive documentation
>> on newstyle classes. Googling for it gives little python tutorials on
>> various sites, and even searching this newsgroup returns very specific
>> questions, as a rule.
>>
>> Alas, the question: Does there exist a page that enumerates all of the
>> features of the newstyle classes, and explains what they all do? If
>> so, can anyone provide me with such a link?
>>
>> Thanks :-)
> 
> 
> Hi Daniel,
> 
> it doesn't yet answer the "definitive" part, but
> <http://www.python.org/moin/NewClassVsClassicClass> is worth a look.
> 
> Best,
> 
> Brian vdB

Yes, that's the best I've come across.  But a clearer overall view, tied 
in to the Language Reference, would be very helpful.

It would be good to have a clear exposition of the pros and cons of 
__new__ usage.

Colin W.



From samantha7395 at hotmail.com  Fri Feb 18 14:55:35 2005
From: samantha7395 at hotmail.com (Samantha)
Date: Fri, 18 Feb 2005 11:55:35 -0800
Subject: Trying to get Font Names
References: <B8KdneiuyLaKoYjfRVn-vQ@adelphia.com>
	<mailman.2812.1108753440.22381.python-list@python.org>
Message-ID: <kcGdnR3N1q-l1YvfRVn-3Q@adelphia.com>

Thanks Fredrik,
The Tkinter method didn't give any results but using PIL did. I'll have to 
play with it a little.
Thanks again,
S
"Fredrik Lundh" <fredrik at pythonware.com> wrote in message 
news:mailman.2812.1108753440.22381.python-list at python.org...
> "Samantha" <samantha7395 at hotmail.com> wrote:
>




From marian at mba-software.de  Sun Feb  6 11:40:13 2005
From: marian at mba-software.de (=?ISO-8859-1?Q?Marian_Aldenh=F6vel?=)
Date: Sun, 06 Feb 2005 17:40:13 +0100
Subject: pygame.mixer.music not playing
In-Reply-To: <1107700800.258876.298010@z14g2000cwz.googlegroups.com>
References: <36mb0iF54udklU1@individual.net>
	<1107700800.258876.298010@z14g2000cwz.googlegroups.com>
Message-ID: <36mvjkF54gvnrU1@individual.net>

Hi,

> Search the net. You are not the first to try and build a jukebox out of pygame ;)

I did find a few, yes.

Currently this is a toy project as I am learning the language, so early
success means more to me than perfect results. And, as I said, I do not really
have an alternative.

Maybe some way to remote control another player would be in order. Leave it
to software that is specialized and all. But I would want something that runs
on Windows and Linux which narrows down my options.

> You have a typo in the code you posted that may be your problem.

You are refering to the missing ' in the filename?

   pygame.mixer.music.load('file1.mp3)

No, that's not the problem. I did paste working code but I then edited out the
full absolute path that I had coded into the program and introduced the error.

I also tried your sample but no difference. Must be something on my system
as it does seem to play...

Ciao, MM
-- 
Marian Aldenh?vel, Rosenhain 23, 53123 Bonn. +49 228 624013.
http://www.marian-aldenhoevel.de
"Wir brauchen keine Opposition, wir sind bereits Demokraten."


From danperl at rogers.com  Sun Feb  6 01:53:56 2005
From: danperl at rogers.com (Dan Perl)
Date: Sun, 6 Feb 2005 01:53:56 -0500
Subject: CGI POST problem was: How to read POSTed data
References: <mailman.1980.1107622913.22381.python-list@python.org>
	<dMydnSAsTcgE2JjfRVn-oQ@rogers.com>
	<1107659974.048175.221770@z14g2000cwz.googlegroups.com>
Message-ID: <YtydnSb8Y82bIpjfRVn-1A@rogers.com>


<and-google at doxdesk.com> wrote in message 
news:1107659974.048175.221770 at z14g2000cwz.googlegroups.com...
> Dan Perl wrote:
>
>> how is a multipart POST request parsed by CGIHTTPServer?
>
> It isn't; the input stream containing the multipart/form-data content
> is passed to the CGI script, which can choose to parse it or not using
> any code it has to hand - which could be the 'cgi' module, but not
> necessarily.
>
>> Where is the parsing done for the POST data following the header?
>
> If you are using the 'cgi' module, then cgi.parse_multipart.

Thanks, at least I was right not to find that in the CGIHTTPServer and 
BaseHTTPServer code.  So I have to use that instead of FieldStorage?  I was 
expecting FieldStorage to encapsulate all that for all the cases, POST with 
multipart/form-data being just a special case.

I took a brief look at cgi.parse_multipart and I still have to figure out 
how to provide the fp argument.  Any code examples anywhere?  All the 
examples I have found were using only FieldStorage:
    http://www.cs.virginia.edu/~lab2q/lesson_7/
    http://www.devshed.com/index2.php?option=content&task=view&id=198&pop=1&page=0&hide_js=1
    http://gnosis.cx/publish/programming/feature_5min_python.html
    http://mail.python.org/pipermail/edu-sig/2001-June/001368.html

BTW, I also tried the example in the last link and that doesn't work either, 
with similar results/problems as my script.  I think all those examples are 
a few years old, has something changed since then?

>> As a side note, I found other old reports of problems with cgi
>> handling POST  requests, reports that don't seem to have had a
>> resolution.
>
> (in particular?)

I made the comment and now I have to back that up:
http://mail.python.org/pipermail/python-list/2002-February/thread.html#88686
http://mail.python.org/pipermail/python-list/2002-September/thread.html#124109

> FWIW, for interface-style and multipart-POST-file-upload-speed reasons
> I wrote an alternative to cgi, form.py
> (http://www.doxdesk.com/software/py/form.html). But I haven't found
> cgi's POST reading to be buggy in general.

I was quite careful in calling the code "fragile" and I am not normally the 
kind of person to mince words.  I would have said buggy if I meant that or I 
could have used even worse words.  But even the rationale behind the patch 
that caused the bug I mentioned ("Remove dependencies on (deprecated) rfc822 
and mimetools modules, replacing with email.") and even your calling this 
part of the standard library "a bit crufty in places due to age" support my 
view that this code needs work.

Besides, I am not happy at all with the idea of having to use 
cgi.parse_multipart instead of FieldStorage.  It seems a lot more low level 
than I would like to even if it offers more control.  I looked at your 
form.py and you seem to address that.  Sorry though, I will probably not use 
it.  Once I learn enough from the cgi module I will just move on to using a 
framework like CherryPy.

Dan 




From softpro at gmx.net  Sun Feb  6 10:58:31 2005
From: softpro at gmx.net (Johannes Ahl-mann)
Date: Sun, 6 Feb 2005 16:58:31 +0100
Subject: bad generator performance
References: <mailman.2021.1107701834.22381.python-list@python.org>
Message-ID: <cu5er6$417$04$1@news.t-online.com>

> You don't really give the complete story so it's hard to tell what
> exactly is going on. For example, I would assume the recursion is
> calling the same method (i.e., depthFirstIterator1 or
> depthFirstIterator2), but then you posted separate timing information
> for a "recursive helper function" so I'm not so sure. Also there is not
> much of a hint as to the nature of your data.

yeah, sorry. i'm not myself lately ;-))
forget about the helper function, that was nonsense! i used a helper
function to build a huge tree as test data, but that is the same
function for both cases!

the program is supposed to manage bookmarks and i thought it would be a
good idea to represent the bookmarks as a tree (with folders as internal
nodes and bookmarks as leaves).
so, a tree is never going to hold more than say 2000 nodes and is going
to be rather wide than deep!

> In my testing (on Python 2.3.4 on
> Windows XP), the generator version takes about 1/4 of the time that the
> list version takes. If both versions call the list version of the method
> recursively (i.e., you're only getting the benefit of the generator at
> the top level of the recursion), the generator version is still about
> 20% faster.
>
> Timing differences could potentially depend on your data also - things
> like how deep vs. wide your tree is.

thx a lot and sorry for not supplying my data type and test data!
hmm, that totally contradicts my profiling results... on my machine the
generator version is repeatedly 10 times slower than the list version as
well with python2.3 as with python2.4.
i don't want to spam the list with hundreds of lines of source code, so
i'll just cry a little and try to do something else than prematurely
optimising my bookmark script *gg*

thx,

Johannes


From axel at straschil.com  Thu Feb  3 07:59:10 2005
From: axel at straschil.com (Axel Straschil)
Date: Thu, 3 Feb 2005 12:59:10 +0000 (UTC)
Subject: Generating modul classes with eval
References: <mailman.1772.1107377411.22381.python-list@python.org>
	<pan.2005.02.02.21.20.40.542069@jerf.org>
	<mailman.1801.1107422854.22381.python-list@python.org>
	<ctt4mu$8vs$05$1@news.t-online.com>
Message-ID: <slrnd04822.e4g.axel@m2.sine>

Hello!

> After the loop has finished, the global variable TmpClass will be bound to
> whatever class was created last, and the variable class_base will be bound
> to that the base class of that same TmpClass. Therefore only this last class
> is guaranteed to work as expected.

Great, now it workes!

_module_name = sys.modules[__name__]
def _tag_class_factory(name, base):
	class T(base):
		def __init__(self, **props):
			super(T, self).__init__(name=name.lower(), **props)
	setattr(_module_name, name, T)
class_dic = {}
class_dic['Br'] = _Tag
class_dic['Hr'] = _Tag
class_dic['Html'] = _ContainerTag
class_dic['Table'] = _ContainerTag
class_dic['Td'] = _ContainerTag
class_dic['Tr'] = _ContainerTag
for name, base in class_dic.items():
	_tag_class_factory(name, base)
print Table(contents=[Tr(contents=[Br()])])

gives: <table><tr><br/></tr></table>

Thanks,
AXEL.



From tores at stud.cs.uit.no  Wed Feb 23 09:22:01 2005
From: tores at stud.cs.uit.no (Tor Erik Sønvisen)
Date: Wed, 23 Feb 2005 15:22:01 +0100
Subject: kill a process in XP
Message-ID: <cvi3i9$161k$1@news.uit.no>

Hi.

>From my Python-program I spawn a new process. When using P_NOWAIT spawnl 
returns the pid but in windows it returns a process handle.
Later I want to kill this process. How can I do this when I only have the 
process handle?

-tores- 




From steve at holdenweb.com  Fri Feb  4 08:37:21 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 04 Feb 2005 08:37:21 -0500
Subject: Converting a string to a function pointer
In-Reply-To: <mailman.1875.1107514850.22381.python-list@python.org>
References: <mailman.1875.1107514850.22381.python-list@python.org>
Message-ID: <AZKMd.103063$Jk5.69843@lakeread01>

H?kan Persson wrote:

> Hi.
> 
> I am trying to "convert" a string into a function pointer.
> Suppose I have the following:
> 
> from a import a
> from b import b
> from c import c
> 
> funcString = GetFunctionAsString()
> 
> and funcString is a string that contains either "a", "b" or "c".
> How can I simply call the correct function?
> I have tried using getattr() but I don't know what the first (object) 
> argument should be in this case.
> 
> Thanks,
> H?kan Persson
> 
> 
Well, one really horrible way would be

   getattr(sys.modules['__main__'], funcString)

and, of course, if you were going to use it a lot you could optimize 
slightly with

   this = sys.modules['__main__']

followed later by

   this = getattr(this, funcString)

Overall, however, it might be better to set uip a mapping for the 
functions you need to be accessible. This has the further merits that

   a) You can heve different, and/or multiple names for a function
   b) You can trap errors more easily
   c) erm, I forgot the third advantage, consider this the Spanish
      Inquisition in reverse :-)

So:

funcMap = {
   "a": a,
   "A": a,
   "b": b,
   "exoticName": c }

   ...

   funcString = GetFunctionAsString()
   try:
     f = funcMap(funcString)
   except KeyError:
     print "No such function"
     raise SomethingElse
   result = f(args)

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From mhartl at post.harvard.edu  Fri Feb 11 18:22:50 2005
From: mhartl at post.harvard.edu (Michael Hartl)
Date: 11 Feb 2005 15:22:50 -0800
Subject: check if object is number
In-Reply-To: <1108155272.438423.177460@l41g2000cwc.googlegroups.com>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
	<374ho0F560ughU1@individual.net>
	<66WdnbJbuf5yj5DfRVn-iA@comcast.com>
	<1108155272.438423.177460@l41g2000cwc.googlegroups.com>
Message-ID: <1108164170.145575.241360@l41g2000cwc.googlegroups.com>

As I mention below, I mistook the function from my utilities file for a
Python built-in; here's the implementation:

#def isnumber(x):
#    "Is x a number? We say it is if it has an __int__ method."
#    return hasattr(x, '__int__')



From s_t_a_n_i at yahoo.com  Sat Feb  5 15:55:12 2005
From: s_t_a_n_i at yahoo.com (s_t_a_n_i at yahoo.com)
Date: 5 Feb 2005 12:55:12 -0800
Subject: ANN: SPE 0.7.2.A IDE with wxGlade, Uml & Blender support
Message-ID: <mailman.2020.1107701330.22381.python-announce-list@python.org>

Spe is a python IDE with auto-indentation, auto completion, call tips,
syntax coloring, uml viewer, syntax highlighting, class explorer,
source index, auto todo list, sticky notes, integrated pycrust shell,
python file browser, recent file browser, drag&drop, context help, ...
Special is its blender support with a blender 3d object browser and its
ability to run interactively inside blender. Spe ships with wxGlade
(gui designer), PyChecker (source code doctor) and Kiki (regular
expression console). Spe is extensible with wxGlade.

The sidebar now features a file browser. I'm now trying to form a team
for future development of SPE. Besides me four people will join the
project:

- Sam Widmer for CVS and bugfixes. So soon more collaboration on SPE
will be possible.
- Nir Aides (author of rpdb) for helping implementing the remote
debugger
- Kevin Walzer for the OS X Port of SPE. Please contact him for Mac
specific issues. Spe for the Mac will be distributed through:
http://www.wordtech-software.com/spe.html
- Jelle Feringa for documentation. The goal is to provide a pdf manual
with the SPE distribution based on the SPE wiki:
http://www.stani.be/spe/wiki Anyone who has comments or wants to edit
the wiki as well can contact Jelle.

If you like SPE, please contribute by coding, writing documentation or
donating. I would like to thank especially Michael Balk, who gave the
largest
donation ever to SPE.

Also I would like to thank Michael Foord, who made SPE part of a new
Python distribution, called "movable python". It gives you the
possibility to carry your favorite developping environment on a USB
stick. So you can continue your work on any computer or test your
modules for different python versions. This distribution opens a lot of
new possibilities, check it out!! For more info, visit
http://www.voidspace.org.uk/python/programs.shtml#movpy

:Batteries included:
  - Kiki:
      Regular Expression (regex) console. For more info:
      http://project5.freezope.org/kiki/index.html
  - PyChecker:
      PyChecker is a tool for finding bugs in python source code. It
      finds problems that are typically caught by a compiler for
      less dynamic languages, like C and C++. It is similar to lint.
      For more info: http://pychecker.sourceforge.net
  - wxGlade:
      wxGlade is a GUI designer written in Python with the
      popular GUI toolkit wxPython, that helps you create
      wxWindows/wxPython user interfaces. As you can guess by the
      name, its model is Glade, the famous GTK+/GNOME GUI builder,
      with which wxGlade shares the philosophy and the look & feel
      (but not a line of code). For more info:
      http://wxglade.sourceforge.net

:New features:
    - sidebar browser (iniated by Attila Magyar)

:Bug fixes:
    - segfaults in Browser
    - indentation can now be different from 4
    - mac osx fixes for kiki, wxGlade & XRC
    - scrollbars of UML view
    - initial sizing and positioning are now restored

:Donations(177.20euro):
    - Michael Balk
    - Jason Powell
    - David Ko Feng
    - Winchell Chung
    - Matthias Haberkorn
    - Kristjan Kannike
    - Robert Cowham
    - Andre Roberge
    - Chris S

:Contributors:
  - Sam Widmer
  - Attila Magyar
  - Kevin Walzer
  - Thurston Stone

:Requirements:
  - full python 2.3+
  - wxpython 2.5.3.8+
  - optional blender 2.35+

:Links:
    - Homepage:     http://spe.pycs.net
    - Website:      http://projects.blender.org/projects/spe/
    - Screenshots:  http://spe.pycs.net/pictures/index.html
    - Forum:        http://projects.blender.org/forum/?group_id=30
    - RSS feed:     http://spe.pycs.net/weblog/rss.xml



From peter at engcorp.com  Wed Feb  9 17:45:54 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 09 Feb 2005 17:45:54 -0500
Subject: A great Alan Kay quote
In-Reply-To: <420a5c1e$0$21630$a1866201@visi.com>
References: <420a5c1e$0$21630$a1866201@visi.com>
Message-ID: <XL6dnQ1rPechD5ffRVn-uw@powergate.ca>

Grant Edwards wrote:
> In an interview at http://acmqueue.com/modules.php?name=Content&pa=showpage&pid=273
> Alan Kay said something I really liked, and I think it applies
> equally well to Python as well as the languages mentioned:
> 
>     I characterized one way of looking at languages in this
>     way: a lot of them are either the agglutination of features
>     or they're a crystallization of style. Languages such as
>     APL, Lisp, and Smalltalk are what you might call style
>     languages, where there's a real center and imputed style to
>     how you're supposed to do everything.
> 
> I think that "a crystallization of style" sums things up nicely.
> The rest of the interview is pretty interesting as well.

Then Perl is an "agglutination of styles", while Python might
be considered a "crystallization of features"...

-Peter


From fredrik at pythonware.com  Fri Feb  4 02:34:45 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 4 Feb 2005 08:34:45 +0100
Subject: Possible additions to the standard library? (WAS: About
	standard library improvement)
References: <WorldClient-F200502031432.AA32333857@tesla.cujae.edu.cu>
	<1d6cdae3050203195251843db2@mail.gmail.com>
Message-ID: <ctv8h1$c25$1@sea.gmane.org>

Daniel Bickett wrote:

> [2] I'm currently unaware if _winreg is a c extension module or pure
> python, but I'm assuming it's C, so I don't know how possible it is to
> add pure python to it...

from the documentation:

    This module exposes a very low-level interface to the Windows registry;
    it is expected that in the future a new winreg module will be created
    offering a higher-level interface to the registry API.

your DeleteKeyAll operation would fit nicely in such an interface, but I'm not
sure it belongs in the low-level interface, and a higher-level interface consisting
of just one helper would seem a bit odd.    on the other hand, it's about time
someone wrote that "winreg" module... (hint).

</F> 





From nhodgson at bigpond.net.au  Mon Feb 28 19:57:55 2005
From: nhodgson at bigpond.net.au (Neil Hodgson)
Date: Tue, 01 Mar 2005 00:57:55 GMT
Subject: Share your SciTEGlobal.properties pls~~~~
References: <1109608274.905138.19730@l41g2000cwc.googlegroups.com>
Message-ID: <n6PUd.179201$K7.54068@news-server.bigpond.net.au>

DENG:

> im new to Python, i chose SciTE as my Python editor. but the problem is
> SciTE needs to be config carefully, are there anyone use SciTE too? can
> you share your SciTEGlobal.properties file? black background solution
> is prefered:)

http://scintilla.sourceforge.net/SciTEFAQ.html#BlackBackground

   Adding changes to your user options file rather the global options file
means that they will survive if you upgrade to a new version of SciTE.

   There is a SciTE mailing list at
http://mailman.lyra.org/mailman/listinfo/scite-interest

   Neil




From fredrik at pythonware.com  Fri Feb  4 14:59:01 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 4 Feb 2005 20:59:01 +0100
Subject: returning True, False or None
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com><5OOMd.12446$W16.3365@trndny07>
	<5sydnV6im6jgJp7fRVn-qQ@comcast.com>
Message-ID: <cu0k43$gmm$1@sea.gmane.org>

Steven Bethard wrote:

>> return max(lst)
>
> Very clever!  Thanks!

too clever.  boolean > None isn't guaranteed by the language specification:

    http://docs.python.org/ref/comparisons.html

    "... objects of different types always compare unequal, and are ordered consistently
    but arbitrarily. /.../ In the future, the comparison rules for objects of different types are
    likely to change. ..."

</F> 





From helten0007 at yahoo.com  Sun Feb 27 13:47:42 2005
From: helten0007 at yahoo.com (Pete.....)
Date: Sun, 27 Feb 2005 19:47:42 +0100
Subject: Making a calendar
References: <422071d5$0$22691$ba624c82@nntp04.dk.telia.net>
	<mailman.3108.1109471520.22381.python-list@python.org>
Message-ID: <4222157e$0$22713$ba624c82@nntp04.dk.telia.net>

Thanks all.

I will look at your links tonight :D
Hopefully they will make me smile and jump around as a happy man...

Cheers


"Brian Sutherland" <jinty at web.de> wrote in message 
news:mailman.3108.1109471520.22381.python-list at python.org...
> On Sat, Feb 26, 2005 at 01:57:20PM +0100, Pete..... wrote:
>> I'm trying to make a calendar for my webpage, python and html is the only
>> programming languages that I know, is it possible to make such a calendar
>> with pythong code and some html.
>>
>> The Idea is that when I click the link calendar on my webpage, then the 
>> user
>> will be linked to the calendar.
>>
>> The calendar should show one month at the time, and the user should be 
>> able
>> to browse to the other month.
>>
>> I will make a script that puts events and such into a db ( I know how to 
>> do
>> this)
>>
>> Then I need a script that puts the events from the db into the calendar, 
>> if
>> every day in the calendar has a value id that part will not be hard.
>
> All this and more (perhaps overkill):
>
> http://www.schooltool.org/schoolbell
>
> -- 
> Brian Sutherland
>
> It's 10 minutes, 5 if you walk fast. 




From exogen at gmail.com  Tue Feb 22 18:29:32 2005
From: exogen at gmail.com (Brian Beck)
Date: Tue, 22 Feb 2005 18:29:32 -0500
Subject: newbie help for mod_python
In-Reply-To: <mailman.2943.1109110879.22381.python-list@python.org>
References: <mailman.2943.1109110879.22381.python-list@python.org>
Message-ID: <cvgfe8$mh0$1@eeyore.INS.cwru.edu>

Jochen Kaechelin wrote:
> I run debian sid and apache2 with libapache2-mod-python2.3
> and I added these lines
> 
> <Directory /var/www>
>    AddHandler mod_python .py
>    PythonDebug On
> </Directory>
> 
> in a virtualhost container.

Were those the only lines you added? You also should have actually 
loaded the module somewhere by adding something resembling:

LoadModule python_module modules/mod_python.so

--
Brian Beck
Adventurer of the First Order


From aleaxit at yahoo.com  Mon Feb  7 05:12:01 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 7 Feb 2005 11:12:01 +0100
Subject: declarations summary
References: <1107750862.485179.61980@c13g2000cwb.googlegroups.com>
Message-ID: <1grm033.wnee8f9w790oN%aleaxit@yahoo.com>

Michael Tobis <mt at 3planes.com> wrote:
   ...
> .x = 1
> .def foo():
> .   if False:
> .      global x
> .   x = 2
> .foo()
> .print x
> 
> prints "1"

Wrong:

>>> x = 1
>>> def foo():
...   if False:
...     global x
...   x = 2
... 
>>> foo()
>>> print x
2

And indeed, that IS the problem.

> Pythonistas appear to be averse to any declarations (in the sense of
> compiler directives) besides "global".

Many of us consider ``global'' a nasty wart, too.

> Anyway, it's this sort of reference-modifier that's at issue here,

You can play with references as much as you like, as long as they're
*COMPOUND* names (attributes, or even, if you with, items).  Just leave
*BARE* names alone, and nobody will jump all over you.

> It's not difficult for me to imagine at least two other things I'd want
> to do with references: 1) make them immutable (making life easier for
> the compiler) 2) make them refer only to objects with certain
> properties (strong duck-typing).

Look at Enthought's ``Traits'' for some highly developed infrastructure
along these lines -- for *COMPOUND* names only, of course.  No ``making
life easier for the compiler'', but for example ease of generation of
forms and other view/controller implementations from a model, etc.

If you're keen to hack on the compiler to take advantage of such
information for code generation purposes, your experimentation will be
easier once the AST branch is folded back into the 2.5 CVS head; if it's
not about code generation but just runtime (so not really about the
compiler but rather about the virtual machine), pypy (see codespeak.net)
may help you similarly, already today.  If you're not keen to hack,
experiment, and prove that dramatic speedups can be obtained this way,
then I doubt that musing about ``helping the compiler'' in a purely
theoretical way is gonna do any good whatsoever.


> On the other hand, I think compiler writers are too attached to
> cleverly divining the intention of the programmer. Much of the effort
> of the compiler could be obviated by judicious use of declarations and
> other hints in cases where they matter. Correct code could always be

Ah, somebody who's never hacked on C compilers during the transition
from when ``judicious use of 'register' '' (surely a classic example of
such an "other hint") was SO crucial, to where it doesn't matter in the
least -- except that it's an ugly wart, and the clutter stays.

Used to be that C compilers didn't do register allocation with any skill
nor finesse, but did let you give a hint by using "register" as the
storage class of a variable.  Smart programmers studied the generated
machine code on a few architectures of interest, placed "register"
appropriately, studied what changes this made to the generated code, and
didn't forget to check on all different machines of interest.

Most C programmers just slapped "register" where they GUESSED it would
help, and in far too many cases they were horribly wrong, because
intuition is no good guide to performance improvement; I have witnessed
examples of code where on certain machine/compiler combinations
inserting a "#define register auto" to disable the GD ``register'' made
some functions measurably FASTER.

Then "graph-coloring" register allocators came into their own and in the
space of a few years ``register'' blissfully became just about
irrelevant; nowadays, I believe all extant compilers simply ignore it,
at least in suitable optimization mode.

Of course, for backwards compatibility, "register" remains in the
language: total, absolute, absurd deadweight -- one extra little
difficulty in learning the language that has absolutely no reason to
exist, gives zero added value, just clutters things up to no purpose
whatsoever.

So much for the ``judicious'' use of performance hints: it just doesn't
happen enough in the real world, to put up with the aggravations until
compiler technology has gotten around to making a certain hint
irrelevant, and the totally useless conceptual and coding clutter
forevermore afterwards.

Those who can't learn from history are condemned to repeat it.  Maybe
some of us just know some history better (perhaps by having lived it)
and don't need yet another round of repetition?

Optional declarations to ease compiler optimizations were at the heart
of Dylan, and looked like a great idea, but Dylan's success surely
wasn't such as to enourage a repeat of this ``soft typing'' experiment,
was it now?  Of course, it's always hard to pinpoint one reason out of a
language's many features -- e.g., Dylan had macros, too, maybe THOSE
were more of a problem than soft-typing.

In theory, I do like the idea of being able to give assertions about
issues that a compiler could not reasonably infer (without analyzing the
whole program's code, which is another idea that never really panned out
for real-life programs as well as one might hope), and having a mode
where those assertions get checked at runtime and another where the
compiler may, if it wishes, rely on those assertions for code
optimization purposes.  In practice, having never seen this
theoretically nice idea work really WELL in real life, despite it being
tried out in a huge number of ways and variations many, MANY times, I'd
have to be convinced that a particular incarnation is working well by
seeing it make a truly impressive performance difference in some
prototype implementation.  AST-branch for the compiler side, and pypy
for the runtime side, are developing in good part just in order to ALLOW
easy experimentation, by coding only Python (and maybe generating some
pyrex, if the point of some idea is making some sparkling machinecode).

Intuitions about performance are far too often completely off the mark:
performance effects just NEED to be shown as working well in practice,
before any credence can be put into reasoning that this, that or the
other tweak "should" speed things up wondrously.

> socks off yet again, but I can't see counting on it. So the successor
> to Fortran (presuming it isn't C++, which I do presume) may be
> influenced by Python, but probably it won't be Python.

You appear to assume that Fortran is dead, or dying, or is gonna die
soon.  I assume Mr. Beliavski will do a great job of jumping on you for
this, so I can save the effort of doing do myself;-).


Alex


From lac at strakt.com  Sat Feb  5 07:39:41 2005
From: lac at strakt.com (Laura Creighton)
Date: Sat, 5 Feb 2005 13:39:41 +0100
Subject: After 40 years ... Knuth vol 4 is to be published!!
Message-ID: <200502051239.j15Cdf6k005835@ratthing-b246.strakt.com>

"More than forty years in the making, the long-anticipated Volume 4
of The Art of Computer Programming is about to make its debuta. in
parts. Rather than waiting for the complete book, Dr. Knuth and
Addison-Wesley are publishing it in installments ("fascicles") a la
Charles Dickens.

See http://www.bookpool.com/.x/xx/ct/163 for an excerpt and more info
on Volume 4.

And Addison-Wesley is offering Bookpool customers an exclusive sneak
peek -- the first official excerpt from the series."

(above from the same site)
Yippee!
Laura



From frans.englich at telia.com  Tue Feb  8 18:14:00 2005
From: frans.englich at telia.com (Frans Englich)
Date: Tue, 8 Feb 2005 23:14:00 +0000
Subject: What's wrong with `is not None`?
Message-ID: <200502082314.00933.frans.englich@telia.com>


That's what PyChecker tells me, at least. 

A line of:

if testReport is not None:

results in:

runner.py:587: Using is not None, may not always work

In what circumstances can `is not None` fail? How and why does it fail?

What is the equivalent expression which is more secure; `!= None`?


Cheers,

		Frans



From kartic.krishnamurthy at gmail.com  Tue Feb  8 13:58:03 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 8 Feb 2005 10:58:03 -0800
Subject: Python mail filter
In-Reply-To: <4208f1d0$1@news.starhub.net.sg>
References: <4208f1d0$1@news.starhub.net.sg>
Message-ID: <1107889083.911654.306580@f14g2000cwb.googlegroups.com>

Mika,

Somebody else had a similar situation of having a script receive the
email and process it.

http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/1f26452835e51c71/e4d6c1efc9a71e39?q=&_done=%2Fgroups%3Fq%3D%26start%3D10%26enc_author%3DVUzGiykAAAD-rgSwZjnUEp_UDWM1Zk6AXwyJTPpMwlh8flm6PB9npBRJrLIi5sMmhFscvSzxHxE%26&_doneTitle=Back+to+Search&&d#e4d6c1efc9a71e39

This is my response to that post and the latter half may help you.

One thing you must remember is once you pipe the email to your script,
it is considered delivered. If you want to script to process and also
receive the email into a user account, you have to list the recipients
in your .forward file. If you want to process the email through your
script and _then_ send it to a user, I think the only way would be to
send the email from your script to next intended recipient.

Thank you,
-Kartic



From paddy3118x at netscape.net  Tue Feb  8 15:04:27 2005
From: paddy3118x at netscape.net (Paddy McCarthy)
Date: Tue, 08 Feb 2005 20:04:27 GMT
Subject: Is Python as capable as Perl for sysadmin work?
In-Reply-To: <mailman.2204.1107885796.22381.python-list@python.org>
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
	<mailman.2204.1107885796.22381.python-list@python.org>
Message-ID: <42091D9F.9000702@netscape.net>

Jeff Epler wrote:
> No.
> 
> Unlike Perl, Python implements only a *finite turning machine* model of
> computation.  An easy way to see this limitation is in the following
> code:
>     >>> 1.0 / 10.0
>     0.10000000000000001
<<Snip>>

> 
> Jeff

Nice,
Made my evening :-)

- Pad.


From jjl at pobox.com  Sat Feb 12 08:43:21 2005
From: jjl at pobox.com (John J. Lee)
Date: 12 Feb 2005 13:43:21 +0000
Subject: Testing web applications
References: <cui0pe$r0c$04$1@news.t-online.com>
	<mailman.2377.1108120636.22381.python-list@python.org>
Message-ID: <871xbl28sm.fsf@pobox.com>

Josef Meile <jmeile at hotmail.com> writes:
> > I'm looking for frameworks to make testing web applications -
> > i.e. parsing and filling out forms - easier. I found Puffin, which
> > looks good but not very usable in the current state. I know that I
> > once read about other nice frameworks, but could not find one via
> > google. Any hints?
> Zope + Formulator is a nice combination to validating and designing
> forms and add some functionality. If you want a more complicated content
> management framework, then you can additionally install plain CMF or
> Plone, which is based on CMF. There is also something called Silva, but
> it doesn't have many products as the other two; however, it is also
> nice.
> 
> I have heard also about CherryPy, Quixote, Twisted Matrix and Webware,
> but I haven't tested them. Once I saw that somebody posted a link, which
> compares some of them, but I lost that thread :-(

Did you read the question?

:-)


John


From tim at zeos.net  Mon Feb 14 11:45:17 2005
From: tim at zeos.net (Timothy Babytch)
Date: Mon, 14 Feb 2005 18:45:17 +0200
Subject: webbrowser.py
In-Reply-To: <pan.2005.02.02.14.36.33.766473@jeremysanders.net>
References: <pan.2005.02.02.14.36.33.766473@jeremysanders.net>
Message-ID: <cuqkqa$2g57$1@news.dg.net.ua>

Jeremy Sanders wrote:
> It occurs to me that webbrowser could be more intelligent on Linux/Unix
> systems. Both Gnome and KDE have default web browsers, so one could use
> their settings to choose the appropriate browser.

> I haven't been able to find a freedesktop common standard for web browser,
> however.

> webbrowser could identify whether it was running under KDE/Gnome (maybe
> scan the processes?), identify the correct desktop's browser (or just use
> Gnome, maybe), and start that web browser.

I would not mind just using default GNOME's browser :)

to determine the one you will need python-gconf2 module and look for 
gconf entry /desktop/gnome/applications/browser

The only bug here is that user MUST have python-gconf2 installed. Many 
GNOMErs do not have it. but hey - one more dependancy.. Who cares? If 
they istalled pyGTK :) - why it is wrong to ask for python-gconf2?


From max at alcyone.com  Sun Feb 13 19:25:33 2005
From: max at alcyone.com (Erik Max Francis)
Date: Sun, 13 Feb 2005 16:25:33 -0800
Subject: Pythonic poker client
In-Reply-To: <1108334914.029293.14830@o13g2000cwo.googlegroups.com>
References: <1108334914.029293.14830@o13g2000cwo.googlegroups.com>
Message-ID: <6c2dnZFXKqBgcpLfRVn-hQ@speakeasy.net>

hardieca at hotmail.com wrote:

> I'm assuming that I need to figure out the port it uses, find the
> server, analyze the packets for commands, and then build an app that
> masquerades as the real client.
> 
> Anyone have any experience with this?

If you're using one of the major sites, what you are trying to do is 
essentially impossible.  It is very likely that the transmissions are 
encrypted via SSL.  Furthermore, such sites may well actively check for 
clients sending invalid data -- something your client will almost 
certainly do at first even if you did somehow manage to crack the 
encryption -- as a tipoff to modified clients and bots.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   If love is the answer, could you rephrase the question?
   -- Lily Tomlin


From fredrik at pythonware.com  Thu Feb  3 13:29:15 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 3 Feb 2005 19:29:15 +0100
Subject: Easy Q: dealing with object type
References: <420181b1$1@nntp.zianet.com><1107396669.028096.301290@g14g2000cwa.googlegroups.com><42019545$1@nntp.zianet.com>
	<SJmdnddykYoAOpzfRVn-hA@comcast.com><just-A7B5B3.12500903022005@news1.news.xs4all.nl>
	<42026b7e$1@nntp.zianet.com>
Message-ID: <cttqg4$gn$1@sea.gmane.org>

Erik Johnson wrote:

>    As an aside, I notice a lot of other people's interpreters actually
> print 'True' or 'False' where my system prints 0 or 1. Is that a
> configuration that can easily set somewhere?

$ python2.1 -c "print 1 == 1"
1

$ python2.2 -c "print 1 == 1"
1

$ python2.3 -c "print 1 == 1"
True

$ python2.4 -c "print 1 == 1"
True

</F> 





From levub137 at wi.rr.com  Sun Feb 27 12:34:37 2005
From: levub137 at wi.rr.com (Raymond L. Buvel)
Date: Sun, 27 Feb 2005 11:34:37 -0600
Subject: any Python equivalent of Math::Polynomial::Solve?
In-Reply-To: <38eaemF5o7kfjU1@individual.net>
References: <just-420C1F.16423926022005@news1.news.xs4all.nl>
	<1109485184.587035.176540@l41g2000cwc.googlegroups.com>
	<just-5C6FB9.11103127022005@news1.news.xs4all.nl>
	<38e9nqF5ndqt9U1@individual.net> <38eaemF5o7kfjU1@individual.net>
Message-ID: <CunUd.23625$Sq5.16141@twister.rdc-kc.rr.com>

Alex Renelt wrote:
> Alex Renelt wrote:
> 
>> in addition:
>> I'm writing a class for polynomial manipulation. The generalization of 
>> the above code is:
>>
>> definitions:
>> 1.) p = array([a_0, a_i, ..., a_n]) represents your polynomial
>> P(x) = \sum _{i=0} ^n a_i x^i
>>
>> 2.) deg(p) is its degree
>>
>> 3.) monic(p) makes P monic, i.e. monic(p) = p / p[:-1]
>>
>> then you get:
>> from numarray import *
>> import numarray.linear_algebra as la
>>
>> def roots(p):
>>     p = monic(p); n = deg(p)
>>     M = asarray(zeros((n,n)), typecode = 'f8')
>> # or 'c16' if you need complex coefficients
>>     M[:-1,1:] = identity(n-1)
>>     M[-1,:] = -p[:-1]
>>     return la.eigenvalues(M)
>>
>> Alex
> 
> 
> uhh, I made a mistake:
> under definitions, 3.)
> its "monic(p) = p / p[-1]" of course
> 
> Alex

Alex,

If you want a class for polynomial manipulation, you should check out my 
ratfun module.

http://calcrpnpy.sourceforge.net/ratfun.html

Ray


From evenprimes at gmail.com  Thu Feb 10 08:59:50 2005
From: evenprimes at gmail.com (Chris Cioffi)
Date: Thu, 10 Feb 2005 08:59:50 -0500
Subject: OT: Anyone want a GMail account?
Message-ID: <f03f4fdf050210055935516eea@mail.gmail.com>

I've got 50 so if you want a GMail invite reply directly to me and
I'll send our an invite.

Chris Cioffi
-- 
"It is our responsibilities, not ourselves, that we should take
seriously." -- Peter Ustinov


From kanenas at tcomcastd.tnet  Thu Feb 10 03:54:04 2005
From: kanenas at tcomcastd.tnet (‘5ÛHH575-UAZWKVVP-7H2H48V3)
Date: Thu, 10 Feb 2005 00:54:04 -0800
Subject: deepcopy chokes with TypeError on dynamically assigned instance
	method
Message-ID: <698m01djeu9jqpnvvk64vmc488e5c026im@4ax.com>

(see end of message for example code)

When an instance has a dynamically assigned instance method, deepcopy
throws a TypeError with the message "TypeError: instancemethod
expected at least 2 arguments, got 0".  Tested with Python 2.3.4 on
OpenBSD and Python 2.4 on Win98; same results.  Is this a bug in
deepcopy, how I dynamically assign the instance method or something
else?  (See example code for how I did it.)

If you're curious as to why the deep copy and dynamic assign are
necessary or have implementation suggestions (or alternatives), I bet
you'd like some details.  The TypeError cropped up while coding a
'Point' class representing cartesian coordinates.  I needed to
overload an 'origin' method as both a class method and an instance
method (if Python were more Perlesque... ;-) ).  'origin' returns a
point representing an origin.  The class method requires an argument
for the dimension of the origin, while the instance method uses the
dimension of an instance (ortus overloading).  As the instance
reference isn't bound when the class 'origin' method is defined,
there's no way to use a default argument.  I instead dynamically
assign an instance method to the 'origin' attribute of the instance.

As for the deepcopy, scalars aren't necessarily of a built-in numeric
type, though I generally expect them to be numeric (you could use
lists or strings as scalars, but not many methods would still be
usable).  Point is the base clase for Vector, and I want (e.g.)
vectors of vectors so I can eventually extend Vector to Matrix and
Tensor.  The Point constructor has a single argument: a sequence of
scalars (which, as noted, can be sequences).  In practice, the
sequence itself will be a tuple, a list, a Point or descendant of
Point (so that Point can act as a copy constructor).  To prevent a
copied point from aliasing elements of a different Point, I used
deepcopy.  When the TypeError struck, I switched to a generator, which
works as long as every constructor functions as a copy constructor
(not necessarily true, apparently, of lists, but true of Points).  I
could also implement copy-on-write semantics for coordinates or
implement __deepcopy__ for Point (which will probably be the final
solution).


example code:

from copy import copy,deepcopy
import new

class Foo(list):
    "Foo"

    def __init__(self, l=[]):
	list.__init__(self, deepcopy(l))
	# using generator rather than deepcopy produces no errors. 
	#list.__init__(self, [copy(el) for el in l])
	# 'copy(el)' in generator results in a deepcopy of sequence
	# as long as each object encountered uses a copy constructor
	# (which I expect of numeric types) and doesn't implement 
	# a shallow __copy__.  Alternative is to use type(el)(el):
	#list.__init__(self, [type(el)(el) for el in l])
	def bar(self):
	    return 'bar'
	self.bar=new.instancemethod(bar, self, self.__class__)
	# also causes deepcopy to choke:
	#self.bar = self._bar

    def _bar(self):
	return 'bar'

    #deepcopy has no problem with this
    bar = _bar
	
    def __repr__(self):
	return self.__class__.__name__+'(['\
		+','.join(map(str, self))+'])'

# causes deepcopy to throw a TypeError
Foo(Foo('foo'))



From peter at somewhere.com  Wed Feb 16 02:34:46 2005
From: peter at somewhere.com (Peter Maas)
Date: Wed, 16 Feb 2005 08:34:46 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cup249$svu$1@gemini.csx.cam.ac.uk>
References: <cuo71l$gig$1@usenet.otenet.gr> <cup249$svu$1@gemini.csx.cam.ac.uk>
Message-ID: <cuv0oc$5ps$1@swifty.westend.com>

Michael Hoffman schrieb:
> Ilias Lazaridis wrote:
> But don't act like the volunteers who develop Python owe you a version
> of Python that runs out of the box on MinGW. They don't, anymore than you
> owe *me* a version of Python that runs out of the box on MinGW.

Please, leave him alone. When he posted here first his tone made me
suspicious and I did some searching. Replies like yours are exactly
what he wants. He is here to fight and to waste your time. But if
you enjoy this ... go ahead ;) I don't so this will be my only post
in this thread.

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From claird at lairds.us  Mon Feb 14 13:08:03 2005
From: claird at lairds.us (Cameron Laird)
Date: Mon, 14 Feb 2005 18:08:03 GMT
Subject: gui scripting
References: <1108381881.828494.98340@c13g2000cwb.googlegroups.com>
Message-ID: <gm27e2-m6i.ln1@lairds.us>

In article <1108381881.828494.98340 at c13g2000cwb.googlegroups.com>,
Tonino <tonino.greco at gmail.com> wrote:
>HI,
>
>I have a 2 phase question:
>
>Phase 1 is I am needing to automate a report generation from a
>proprietary product.  Currently a person sits and input's the data into
>a GUI frontend and clicks's the appropriate buttons to start the report
>generation.  What I am wanting todo is automate this, but since the GUI
>is from a proprietary product all I have is the GUI.
>
>This is done on a Linux Xfree server.  Can anyone please point me in a
>direction to a pythonic gui scripting module ?
>Python is the best tool and we use it elsewhere - so it is the best
>option.
>
>Second phase will have this done on a Windows platform... but that is
>second priority ...
			.
			.
			.
While I understand and applaud your affection for Python,
the solution that I think will best suit you is based on
Tcl.  <URL: http://wiki.tcl.tk/android > has details.

For the Windows side, see <URL: http://wiki.tcl.tk/8813 >.


From tom.willis at gmail.com  Thu Feb 24 15:42:58 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Thu, 24 Feb 2005 15:42:58 -0500
Subject: Interesting decorator use.
In-Reply-To: <421e2398@nntp0.pdx.net>
References: <421e2398@nntp0.pdx.net>
Message-ID: <b54d048905022412421a202417@mail.gmail.com>

On Thu, 24 Feb 2005 11:15:07 -0800, Scott David Daniels
<Scott.Daniels at acm.org> wrote:
> 
> I have started doing the following to watch for exceptions in wxPython.
> I'd like any input about (A) the interface, and (B) the frame before I
> throw it in the recipes book.
> 
>      import wx, os, sys
>      errorframe = None
> 
>      def watcherrors(function):
>          '''function decorator to display Exception information.'''
>          def substitute(*args, **kwargs):
>...

Pretty cool.

Question on decorators in general. Can you parameterize those?

If I wanted to something and after the function call for example, I
would expect something like this would work.

def prepostdecorator(function,pre,post):
    def wrapper(*args,**kwargs):
        pre()
        result =  function(*args,**kwargs)
        post()
        return result
    return wrapper

def dopre():
    print "call pre"

def dopost():
    print "call post"

@prepostdecorator(pre,post)
def sayhello(Name):
    print "Hey %s, nice to meet you" % Name

#sayhello = prepostdecorator(sayhello,dopre,dopost)

if __name__=="__main__":
    sayhello("Dude")



but I get ...
TypeError: prepostdecorator() takes exactly 3 arguments (2 given)


Where as 

def prepostdecorator(function,pre,post):
    def wrapper(*args,**kwargs):
        pre()
        result =  function(*args,**kwargs)
        post()
        return result
    return wrapper

def dopre():
    print "call pre"

def dopost():
    print "call post"

def sayhello(Name):
    print "Hey %s, nice to meet you" % Name

sayhello = prepostdecorator(sayhello,dopre,dopost)

if __name__=="__main__":
    sayhello("Dude")

#outputs
call pre
Hey Dude, nice to meet you
call post

Does what I want.


I guess I'm having problems with how function get's in there similair
to how self magically gets in a method, except when you specify other
params. Got linky?



-- 
Thomas G. Willis
http://paperbackmusic.net


From rory at campbell-lange.net  Wed Feb 16 17:13:54 2005
From: rory at campbell-lange.net (Rory Campbell-Lange)
Date: Wed, 16 Feb 2005 22:13:54 +0000
Subject: Newbie question about class operator overloading
In-Reply-To: <o_udndekQvmR64_fRVn-tg@comcast.com>
References: <mailman.2637.1108489440.22381.python-list@python.org>
	<o_udndekQvmR64_fRVn-tg@comcast.com>
Message-ID: <20050216221354.GA30498@campbell-lange.net>

Hi Steve

I've been playing around with your two suggestions. 

The Record class is an elegant solution. It doesn't however help in the
case where the class has the following general data structure (something
I should have stated originally):

    class.config1 = param
    class.config2 = param
    class.data    = {
                       'this' : []
                       'that' : []
                       ...
                    }

The __setitem__ and __getitem__ methods allow the class.data data
structure to be dealt with easily as self.data[key] = val
without worrying about getting involved with other variables such as
config1 and config2 (because potentially a data key could be called
'config1' for example.

So the __getitem__ and __setitem__ give data hiding properties when I
inherit from this class.

I think!
Anyway, I'm very grateful for your help.

Rory

On 15/02/05, Steven Bethard (steven.bethard at gmail.com) wrote:
> Rory Campbell-Lange wrote:

> >I am anxious about how best to set and access items one level down in a
> >data structure if I am using __setitem__ and __getitem__.
...

> >object['three'] = [0, 'val0'] # set
> >x =  object['three'][0]       # get
...

> py> data['one'].foo = 'val0'
> py> data
> {'two': Record(5, 6, {}, 8), 'one': Record('val0', 2, {}, 4)}
> py> data['one'].foo
> 'val0'
...
> ...     def __setitem__(self, x, value):
> ...         try:
> ...             name, index = x
> ...             self.data.setdefault(name, {})[index] = value
> ...         except ValueError:
> ...             self.data[x] = value

...
> py> c['one', 0] = 1

This does seem a lot more logical than my object['three'] = [0, 'val0'].
Thanks for this (and using try against a possible ValueError).

...
> As you can see, Python has builin syntax support to allow tuples to be 
> used as dict keys.  (The parentheses can be omitted.)
> 
> Still, I think the class-based solution is much better than the 
> __getitem__/__setitem__ one.
-- 
Rory Campbell-Lange 
<rory at campbell-lange.net>
<www.campbell-lange.net>


From ajsiegel at optonline.com  Tue Feb  8 20:58:40 2005
From: ajsiegel at optonline.com (Arthur)
Date: Tue, 08 Feb 2005 20:58:40 -0500
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
Message-ID: <6toi01140mis4en4757f513f5l3ipv8a5o@4ax.com>

On Sat, 5 Feb 2005 17:00:15 +0100, aleaxit at yahoo.com (Alex Martelli)
wrote:

>Alexander Zatvornitskiy
><Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org> wrote:
>   ...
>>  AM> The fact that in Python there are ONLY statements, NO declarations,
>> ===
>> def qq():
>>  global z
>>  z=5
>> ===
>> What is "global"? Statement? Ok, I fill lack of "var" statement:)
>
>'global' is an ugly wart, to all intents and purposes working "as if" it
>was a declaration.  If I had to vote about the one worst formal defect
>of Python, it would surely be 'global'.

Venturing in - again - over my head. Brave or stupid.  

But the fact that I cannot dissect Python byte code, doesn't mean I
can't follow the logic or illogic of an argument. Or hear, or
interpret reasonably well what I hear.

I will accept that global is a horribly wart for reasons that I don't
understand.  (worse than print>> for more reasons I don't understand
as well ?)

But making the argument that it is a wart *because* it is declarative,
and therefore a violation  of Python's purity is hard for me. 

"""
The fact that in Python there are ONLY statements, NO declarations, is
a completely different LEVEL of issue -- a totally deliberate design
choice taken in full awareness of all of its implications.  
"""

Global is there. It was put there by someone who presumably knows his
declaratives. So simply as a matter of logic, your assertion doesn't
hold up.

And as we learn, what is true of Python today is not necessarily what
is true of Python tomorrow.  And my understanding of the arguments
surrounding the decorator debate suggested to me that there is
decently strong sentiment among a segment of the folks who represent
"the community" much better than do I, that if there indeed has been
any purist stricture about the use of declaratives in the kanguage, it
may be wise to loosen it.

Why is it logical to believe that a language that is purely anything
will best do.  Python prides itself on being multi-paradigm, thought
I. Except Ales says no declarations allowed, with great authority. 

Do they belong in any language? Solve problems in any language?

If so, why is that Python is denied them?

Ultimately I don't think Guido chooses to be restricted by these kinds
of notions of purity.  And suspect that if and when declarations best
solve real problems, they will brought to bare - without regard to
such notions.

I am sure you could if you wanted provide a highly competent - OK
brilliant - answer to why given this and that aspect of Python it
can't and won't and shouldn't be.. 

But you are a polemicist at heart, it seems to me - on observation
from non-techncial discussion.

So all my technical limitations aside, I still don't think I could
decipher where polemics ends, and analysis begins.

Squash me like a bug, it you like. But I am not - just so you know -
meaning to be even unfriendly, much less hostile.


Art


>
>Fortunately, it's reasonably easy to avoid the ugliness, by avoiding
>rebinding (within functions) global variables, which tend to be easy. 
>
>What you keep demanding is a way to inject far worse ugliness, and in a
>context in which the typical behavior of pointy-haired bosses will be to
>make it unavoidable for many of the people who work with Python.  I am
>strongly convinced that, if you had your wish, the total amount of
>happiness in the world would be quite substantially diminished, and I
>will do anything I can to stop it from happening.
>
>
>>  >> Fine! Let interpreter never show us errors like division by zero,
>>  >> syntax errors, and so on. If file not found, library don't need to
>>  >> say it. Just skip it!!! Because every, even simple, test will find
>>  >> such bugs. Once you have unit tests, the added value of <anything>
>>  >> is tiny, and their cost remains.
>>  AM> Another false assertion, and a particularly ill-considered one in ALL
>>  AM> respects. Presence and absence of files, for example, is an
>   ...
>> Here, you take one detail and bravely fight with it. Just try to understand
>> meaning of my sentence, in all. It will help:)
>
>I tear ONE of your examples to pieces in gory detail, because it's not
>worth doing the same over and over again to every single piece of crap
>you filled that sentence with -- very similar detailed arguments show
>how utterly inane the whole assertion is.
>
>There IS no meaning to your (several) sentences above-quoted, that it
>can help anybody to "try to undestand": it's simply an insanely bad
>attempt at totally invalid parallels.
>
>>  AM> In brief: you're not just wrong, you're so totally, incredibly,
>>  AM> utterly and irredeemably wrong that it's not even funny.
>> Hey, take it easy! Relax, reread that piece of text. It was written with smile
>> on my lips. Here it is for your convenience:
>
>Do yourself a favor: don't even _try_ to be funny in a language you have
>so much trouble with.  Your communication in English is badly enough
>impaired even without such lame attempts at humor: don't made bad things
>even worse -- the result is NOT funny, anyway, just totally garbled.
>
>I'm not a native English speaker, either, so I keep a careful watch on
>this sort of thing, even though my English would appear to be a bit
>better than yours.
>
>
>> Again, skip small details and take a look on the problem "in general".
>Here is,
>
>There IS no ``problem "in general"'': Python does a pretty good job of
>diagnosing as many errors as can be diagnosed ***without demanding
>absurdities such as redundancy on the programmer's part***.  Period.
>
>> again, the main idea:
>> ========
>> Or, maybe, we will ask interpreter to find and prevent as many errors as he
>> can?
>
>To show how absurd that would be: why not force every line of the
>program to be written twice, then -- this would help diagnose typos,
>because the interpreter could immediately mark as errors any case in
>which the two copies aren't equal.  Heck, why stop at TWICE -- even MORE
>errors will be caught if every line has to be written TEN times.  Or a
>million.  Why not?  *AS MANY ERRORS AS [it] CAN* is an *ABSURD*
>objective, if you don't qualify it with *WHILE AVOIDING ANY ENFORCED
>REDUNDANCY* introduced solely for that purpose.
>
>As soon as you see that such redundancy is a horror to avoid, you will
>see that Python's design is essentially correct as it is.
>
>
>> You wrote about "substantial cost" of var declarations. Yes, you are
>> write. But think about the cost of lack of var declarations. Compare time
>> that programmer will waste on search for the reason of bug caused by such
>> typo, plus time what programmer will waste while remembering exact
>> variable name.
>
>I've been programming essentially full-time in Python for about three
>years, plus a few more years before then when I used Python as much as I
>could, even though my salary was mostly earned with C++, Visual Basic,
>Java, perl, and so on.  My REAL LIFE EXPERIENCE programming in Python
>temms me that the time I've "wasted on search" etc due to the lack of
>variable declaration is ***FUNDAMENTALLY NOTHING AT ALL***.  Other
>hundreds of thousands of man-hours of similar Python programming
>experience on the part of hundreds of other programmers essentially
>confirm these findings.
>
>Your, what, TENS?, of man-hours spent programming in Python tell you
>otherwise.  Fine, then *USE ANOTHER LANGUAGE* and be happy, and let US
>be just as happy by continuing to use Python -- almost all languages do
>things the way you want, so ***leave alone*** the few happy oases such
>as Python and Ruby where programmers can happily avoid the idiotic
>redundancy of variable declarations, and not even PHBs can impose
>otherwise.
>
>
>> Compare it with time for looking on message:
>> ===
>> Traceback (most recent call last):
>>   File "<pyshell#16>", line 5, in -toplevel-
>>     epselon
>> NameError: name 'epselon' is not defined, in strict mode
>> ===
>> and fixing it, plus time on typing three letters (or less).
>
>Like experience shows in all cases of such idiotic redundancies, the
>real waste of time comes in the BAZILLION cases where your program WOULD
>be just fine -- except you missed one redundancy, so you have to go and
>put it in to make the gods of redundancy happy again.  That happens with
>VASTLY higher frequency than the cases where the enforced redundancy
>saves you a comparable amount of time by catching some error earlier.
>
>Plus, the FALSE confidence coming from redundancy works against you by
>kidding you into believing that a BAZILLION other typos can't still be
>lurking in your code, just because you've eliminated one TINY subset of
>such typos (typos in names of variables that happen to leave the mangled
>names syntactically valid BUT different from any other variable) -- and
>*ONLY* that tiny subset of such typos which happened on the left of a
>plain '=' (since all others, happening on the RIGHT of an '=' or on the
>left of an _augmented_ '=', were already caught), and ONLY regarding
>barenames (such typos on any but the rightmost component of compound
>names were already caught intrinsically, and catching those on the
>rightmost component is trivially easier than introducing a {YECCCCHH}
>'vars' as you so stubbornly insist)...
>
>Basically you're focusing on maybe ONE IN A MILLION of the errors you
>could make and want to pervert the whole foundation of Python, and
>seriously hamper the productivity of hundreds of thousands of Python
>programmers in every normal case!, to save maybe two minutes in such a
>one-in-a-million case.
>
>I consider this one of the worst ideas to have been proposed on this
>newsgroup over the years, which _IS_ saying something.  Oh, you're not
>the only one, for sure -- there must have been a dozen before you, at
>least.  Fortunately, even though almost each and every one of them has
>wasted more of everybody's time with such ideas, than even their
>scare-tactics claim of ``wastes of time'' due to lack of declarations
>could account for, Python is still intact.  A few of the stubborn lovers
>of declarations tried doing without, and, to their astonishment, found
>out that everybody else, with years of Python experience, was right, and
>they, without ANY such experience, were wrong (just incredible, eh?!);
>others have gone away to find their bliss in Perl, PHP, or whatever --
>good riddance, and don't let the door slam behind you as you go, please.
>
>
>Alex



From frans.englich at telia.com  Tue Feb  1 14:53:13 2005
From: frans.englich at telia.com (Frans Englich)
Date: Tue, 1 Feb 2005 19:53:13 +0000
Subject: Python's idiom for function overloads
In-Reply-To: <wu6dnUJZeOHJkGLcRVn-3g@comcast.com>
References: <mailman.1677.1107230965.22381.python-list@python.org>
	<wu6dnUJZeOHJkGLcRVn-3g@comcast.com>
Message-ID: <200502011953.14114.frans.englich@telia.com>

On Tuesday 01 February 2005 05:02, Steven Bethard wrote:
> Frans Englich wrote:
> > But in Python, when one wants to be able to pass different data types
> > into a single "entry point" for functionality, how is that best done? To
> > in a function do an if statement with the type() function?
>
> It often depends a lot on the specific use case...  Do you have a
> particular example in mind?

I did have a specific scenario, but it blurred into a general wondering about 
typing. I think my problem was, and still is, that I don't think in Python 
terms but try to force other idioms. Thinking in static typic terms when 
Python goes in the opposite direction clearly shows friction is created. 


The replies were interesting,

		Frans


From grante at visi.com  Wed Feb  9 18:28:17 2005
From: grante at visi.com (Grant Edwards)
Date: 09 Feb 2005 23:28:17 GMT
Subject: negative integer division
References: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
	<42096EAD.879E8A5F@yahoo.com> <86wtti76cp.fsf@guru.mired.org>
	<420A916C.94F7F175@yahoo.com> <420a9513$0$29477$a1866201@visi.com>
	<420A98C7.103157A@yahoo.com> <420A98FA.F3EBF237@yahoo.com>
Message-ID: <420a9c91$0$21598$a1866201@visi.com>

On 2005-02-09, Jive Dadson <jdadson at yahoo.com> wrote:

> intentionally

I disagree!

-- 
Grant Edwards                   grante             Yow!  ... I don't like
                                  at               FRANK SINATRA or his
                               visi.com            CHILDREN.


From steven.bethard at gmail.com  Thu Feb 24 17:07:26 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 24 Feb 2005 15:07:26 -0700
Subject: Interesting decorator use.
In-Reply-To: <M5adncYw-5gT04PfRVn-ug@comcast.com>
References: <421e2398@nntp0.pdx.net>
	<mailman.3017.1109277781.22381.python-list@python.org>
	<M5adncYw-5gT04PfRVn-ug@comcast.com>
Message-ID: <OMidnbcowrSBzYPfRVn-uw@comcast.com>

I wrote:
> Tom Willis wrote:
> 
>> Question on decorators in general. Can you parameterize those?
>
[snip]
> 
> If you want to call prepostdecorator with 2 arguments, you need to write 
> it this way.  A few options:

Sorry, I forgot my favorite one:

(4) Use a class and functional.partial:

py> class prepostdecorator(object):
...     def __init__(self, pre, post, function):
...         self.pre, self.post, self.function = pre, post, function
...     def __call__(self, *args, **kwargs):
...         self.pre()
...         result = self.function(*args,**kwargs)
...         self.post()
...         return result
...
py> @partial(prepostdecorator, dopre, dopost)
... def sayhello(name):
...     print "Hey %s, nice to meet you" % name
...
py> sayhello('Tom')
call pre
Hey Tom, nice to meet you
call post

Woo-hoo, I got rid of all the nested functions!  ;)

STeVe


From steven.bethard at gmail.com  Mon Feb  7 13:50:53 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 07 Feb 2005 11:50:53 -0700
Subject: empty classes as c structs?
In-Reply-To: <mailman.2094.1107800398.22381.python-list@python.org>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<7rSdne7BcbDeV57fRVn-jg@comcast.com>	<mailman.1963.1107594941.22381.python-list@python.org>	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>	<mailman.1973.1107618702.22381.python-list@python.org>	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>	<mailman.2006.1107658273.22381.python-list@python.org>	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>	<mailman.2049.1107750700.22381.python-list@python.org>	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com>	<4207606E.4040806@iinet.net.au>
	<mailman.2094.1107800398.22381.python-list@python.org>
Message-ID: <XYqdnb9bj4sVJZrfRVn-vw@comcast.com>

Michael Spencer wrote:
> Nick Coghlan wrote:
> 
>> Steven Bethard wrote:
>>
>>> It was because these seem like two separate cases that I wanted two 
>>> different functions for them (__init__ and, say, dictview)...
> 
> I see this, but I think it weakens the case for a single implementation, 
> given that each implementation is essentially one method.

Do you mean there should be a separate Namespace and Bunch class?  Or do 
you mean that an implementation with only a single method is less useful?

If the former, then you either have to repeat the methods __repr__, 
__eq__ and update for both Namespace and Bunch, or one of Namespace and 
Bunch can't be __repr__'d, __eq__'d or updated.

If the latter (setting aside the fact that the implementation provides 4 
methods, not 1), I would argue that even if an implementation is only 
one method, if enough users are currently writing their own version, 
adding such an implementation to the stdlib is still a net benefit.

>> I think Michael's implementation also fell into a trap whereby 'E' 
>> couldn't be used as an attribute name. The version below tries to 
>> avoid this (using magic-style naming for the other args in the methods 
>> which accept keyword dictionaries).
> 
> You're right - I hadn't considered that.  In case it wasn't obvious, I 
> was matching the argspec of dict.  Your solution avoids the problem.

Another way to avoid the problem is to use *args, like the current Bunch 
implementation does:

     def update(*args, **kwargs):
         """bunch.update([bunch|dict|seq,] **kwargs) -> None

         Updates the Bunch object's attributes from (if
         provided) either another Bunch object's attributes, a
         dictionary, or a sequence of (name, value) pairs, then from
         the name=value pairs in the keyword argument list.
         """
         if not 1 <= len(args) <= 2:
             raise TypeError('expected 1 or 2 arguments, got %i' %
                             len(args))
         self = args[0]
         if len(args) == 2:
             other = args[1]
             if isinstance(other, Bunch):
                 other = other.__dict__
             try:
                 self.__dict__.update(other)
             except (TypeError, ValueError):
                 raise TypeError('cannot update Bunch with %s' %
                                 type(other).__name__)
         self.__dict__.update(kwargs)

This even allows you to use the keywords __self__ and __orig__ if you're 
sick enough to want to.  It's slightly more work, but I prefer it 
because it's more general.

>> To limit the special casing in update, I've switched to only using 
>> __dict__ for the specific case of instances of namespace
> 
> That seems a pity to me.

Is it that much worse to require the following code:

     Namespace.update(namespace, obj.__dict__)

or:

     namespace.udpate(obj.__dict__)

if you really want to update a Namespace object with the attributes of a 
non-Namespace object?

For that matter, do you have a use-case for where this would be useful? 
  I definitely see the view-of-a-dict example, but I don't see the 
view-of-an-object example since an object already has dotted-attribute 
style access...

>> This is to allow easy copying of an existing namespace - 
> 
> Can't this be spelled namespace(somenamespace).__copy__()?

I'd prefer to be consistent with dict, list, set, deque, etc. all of 
which use their constructor for copying.

> We could use __add__, instead for combining namespaces

I don't think this is a good idea.  For the same reasons that dicts 
don't have an __add__ (how should attributes with different values be 
combined?), I don't think Bunch/Namespace should have an __add__.

Steve


From kartic.krishnamurthy at gmail.com  Wed Feb 16 16:58:30 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 16 Feb 2005 13:58:30 -0800
Subject: problem with tutor mailing
In-Reply-To: <614c778e.0502161311.619e98bf@posting.google.com>
References: <614c778e.0502161311.619e98bf@posting.google.com>
Message-ID: <1108591110.487939.125010@z14g2000cwz.googlegroups.com>

Ah...I see your predicament after reading Brian's response.  I mistook
your post to be about getting spammed.

Sorry fella, if you are on a mailing list you are going to get ALL
mails addressed to the list (whether or not they are responses to your
questions).  Your only option is to turn off mail delivery completely,
but that means you will not get any answers related to your questions
either.

Believe me, it is not a bad idea or an inconvenience to receive other
emails on the list; you will learn a thing or two!

Thanks,
-Kartic



From steve at holdenweb.com  Sat Feb  5 08:16:22 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 05 Feb 2005 08:16:22 -0500
Subject: returning True, False or None
In-Reply-To: <Bl3Nd.103624$Jk5.569@lakeread01>
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
	<PTOMd.103076$Jk5.19984@lakeread01>
	<8u6801pkc3m856jgh88cjb1f3dglqiqhbi@4ax.com>
	<Bl3Nd.103624$Jk5.569@lakeread01>
Message-ID: <XL3Nd.103628$Jk5.76979@lakeread01>

Steve Holden wrote:

> Christos TZOTZIOY Georgiou wrote:
> 
>> On Fri, 04 Feb 2005 13:04:16 -0500, rumours say that Steve Holden
>> <steve at holdenweb.com> might have written:
>>
>> [STeVe]
>>
>>>> For a given list:
>>>> * If all values are None, the function should return None.
>>>> * If at least one value is True, the function should return True.
>>>> * Otherwise, the function should return False.
>>
>>
>>
>> [Stevbe]
>>
>>> If you wanted to get clever you could write something like
>>>
>>> for i in True, False:
>>>  if i in lst:
>>>    return i
>>> return False
>>
>>
>>
>> [!Steve]
>>
>> You mistyped None as False in the last line.  Your typos are getting 
>> worse every
>> day :)
> 
> 
> That wasn't a *type*, it was a *thinko*
> 
> regards
>  Steve

Sheesh, now I even make typos typing about typos ...

giving-up-on-the-spill-chocker-ly y'rs  - steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From steven.bethard at gmail.com  Mon Feb  7 12:06:37 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 07 Feb 2005 10:06:37 -0700
Subject: empty classes as c structs?
In-Reply-To: <mailman.2065.1107779702.22381.python-list@python.org>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<7rSdne7BcbDeV57fRVn-jg@comcast.com>	<mailman.1963.1107594941.22381.python-list@python.org>	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>	<mailman.1973.1107618702.22381.python-list@python.org>	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>	<mailman.2006.1107658273.22381.python-list@python.org>	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>	<mailman.2049.1107750700.22381.python-list@python.org>	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com>
	<mailman.2065.1107779702.22381.python-list@python.org>
Message-ID: <4ZGdnajh7-eFPZrfRVn-3A@comcast.com>

Nick Coghlan wrote:
> Finally, I've just used normal names for the functions. I think the 
> issue of function shadowing is best handled by recommending that all of 
> the functions be called using the class explicitly - this works just as 
> well for instance methods as it does for class or static methods.

I wonder if it would be worth adding a descriptor that gives a warning 
for usage from instances, e.g.:

py> import new
py> import warnings
py> class InstanceWarner(object):
...     def __init__(self, func):
...         self.func = func
...     def __get__(self, obj, type=None):
...         if obj is None:
...             return self.func
...         else:
...             warnings.warn('methods of this type should not be '
...                           'invoked from instances')
...             return new.instancemethod(self.func, obj, type)
...
py> class Bunch(object):
...     @InstanceWarner
...     def update(self):
...         print 'updating', self
...
py> Bunch.update(Bunch())
updating <__main__.Bunch object at 0x01152830>
py> Bunch().update()
__main__:8: UserWarning: methods of this type should not be invoked from 
instances
updating <__main__.Bunch object at 0x011527D0>

Steve


From peter at engcorp.com  Wed Feb  9 18:17:46 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 09 Feb 2005 18:17:46 -0500
Subject: newbie question
In-Reply-To: <1107990182.516041.120410@o13g2000cwo.googlegroups.com>
References: <1107990182.516041.120410@o13g2000cwo.googlegroups.com>
Message-ID: <xfOdnUnRLYukB5ffRVn-tA@powergate.ca>

doodle4 at gmail.com wrote:
> What is the python equivalent of the following statement?
> 
> while (n--)
> 
> Thank you.

That depends on a number of things, including whether "n"
is declared as "volatile", and whether you consider the
above as an executable piece of code (it is not), or just a
code snippet...

Roughly but somewhat facetiously speaking, the answer is this:

n = -1

(Maybe describing what you are trying to accomplish would
be more useful than showing snippets of code without
explaining what you are expecting it to do.)

-Peter


From wittempj at hotmail.com  Wed Feb  2 15:01:21 2005
From: wittempj at hotmail.com (wittempj at hotmail.com)
Date: 2 Feb 2005 12:01:21 -0800
Subject: Finding user's home dir
In-Reply-To: <5i9rtc.rq31.ln@orion.homeinvalid>
References: <5i9rtc.rq31.ln@orion.homeinvalid>
Message-ID: <1107374184.557720.205600@o13g2000cwo.googlegroups.com>

on win xp home, python 2.4 its also correct for me



From phark52 at yahoo.com  Sat Feb 26 00:25:37 2005
From: phark52 at yahoo.com (Artificial Life)
Date: Sat, 26 Feb 2005 05:25:37 GMT
Subject: urllib2 meta-refresh
Message-ID: <pan.2005.02.26.05.33.14.950763@yahoo.com>

urllib2 does not seem to be able to handle META-REFRESH in an html
document. I just get back the html to the page that is supposed to forward
me to the intended page. Any way around this? 



From john at grulic.org.ar  Thu Feb 17 14:33:00 2005
From: john at grulic.org.ar (John Lenton)
Date: Thu, 17 Feb 2005 16:33:00 -0300
Subject: [EVALUATION] - E02 - ULTIMATE RECIPE TO RESOLVE ALL ISSUES
In-Reply-To: <oTF1JdVCdOFCFwep@objmedia.demon.co.uk>
References: <cuo71l$gig$1@usenet.otenet.gr> <cuv1st$6um$1@swifty.westend.com>
	<cv2m54$hnf$1@usenet.otenet.gr>
	<oTF1JdVCdOFCFwep@objmedia.demon.co.uk>
Message-ID: <20050217193300.GE2366@grulic.org.ar>

On Thu, Feb 17, 2005 at 06:49:38PM +0000, Stephen Kellett wrote:
> Next you'll be telling me the world is flat and held up by an infinite 
> array of tortoises.

no, of course not! It's an iterator.

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
Test-tube babies shouldn't throw stones.
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From john at grulic.org.ar  Mon Feb  7 15:54:55 2005
From: john at grulic.org.ar (John Lenton)
Date: Mon, 7 Feb 2005 17:54:55 -0300
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <cu8jlk$5v9$00$1@news.t-online.com>
References: <dvOMd.33656$EG1.19314@lakeread04>
	<mailman.2034.1107725421.22381.python-list@python.org>
	<cu7532$er8$01$1@news.t-online.com>
	<200502071907.12169.francis.girard@free.fr>
	<mailman.2097.1107802306.22381.python-list@python.org>
	<cu8jlk$5v9$00$1@news.t-online.com>
Message-ID: <20050207205454.GA3253@grulic.org.ar>

On Mon, Feb 07, 2005 at 09:39:11PM +0100, Peter Otten wrote:
> John Lenton wrote:
> >                                         For example, the fastest way
> > to get the factorial of a (small enough) number in pure python is
> > 
> >   factorial = lambda n: reduce(operator.mul, range(1, n+1))
>  
> I see that you are seduced by the beauty of the expression. Otherwise, if
> you would really care for speed:
> 
> [...]

that's cheating: you moved the calculation into the setup. You aren't
timing what you say you are.

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
I'd rather push my Harley than ride a rice burner.
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From jmeile at hotmail.com  Fri Feb 11 06:19:50 2005
From: jmeile at hotmail.com (Josef Meile)
Date: Fri, 11 Feb 2005 12:19:50 +0100
Subject: Testing web applications
In-Reply-To: <420C942E.7040901@hotmail.com>
References: <cui0pe$r0c$04$1@news.t-online.com> <420C942E.7040901@hotmail.com>
Message-ID: <420C94D6.80309@hotmail.com>

> Zope + Formulator is a nice combination to validating and designing
> forms and add some functionality. If you want a more complicated content
> management framework, then you can additionally install plain CMF or
> Plone, which is based on CMF. There is also something called Silva, but
> it doesn't have many products as the other two; however, it is also
> nice.
> 
> I have heard also about CherryPy, Quixote, Twisted Matrix and Webware,
> but I haven't tested them. Once I saw that somebody posted a link, which
> compares some of them, but I lost that thread :-(
I found it:
http://www.cmsmatrix.org/


From fumanchu at amor.org  Mon Feb 14 12:38:41 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Mon, 14 Feb 2005 09:38:41 -0800
Subject: Help with embedding fully qualified script name
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E3398404@exchange.hqamor.amorhq.net>

Kamilche wrote:
> To avoid pathname headaches, I've taken to including the following 3
> lines at the top of every script that will be double-clicked:
> 
> import os, sys
> pathname, scriptname = os.path.split(sys.argv[0])
> pathname = os.path.abspath(pathname)
> os.chdir(pathname)

Putting the sys.argv call in a main block would make it more
future-proof (for the day when your script becomes a library ;):

import os
pathname = os.path.normpath(os.path.dirname(__file__))

# application code goes here

if __name__ == '__main__':
    import sys
    pathname = os.path.normpath(os.path.dirname(sys.argv[0]))


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org


From max at alcyone.com  Sun Feb 13 21:41:44 2005
From: max at alcyone.com (Erik Max Francis)
Date: Sun, 13 Feb 2005 18:41:44 -0800
Subject: For American numbers
In-Reply-To: <0omdnfYNUY4zmY3fRVn-rA@powergate.ca>
References: <420e7376$1@nntp0.pdx.net> <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
	<zzJPd.47429$Z14.33326@news.indigo.ie>
	<0omdnfYNUY4zmY3fRVn-rA@powergate.ca>
Message-ID: <9IGdne60V9R1ko3fRVn-ow@speakeasy.net>

Peter Hansen wrote:

> I'll be one of the last holdouts, too...  it's really not
> so hard to work in powers of two if you try...

The difficulty isn't with working in powers of 1024, it's that the terms 
are used inconsistently even within the computing industry.  Memory is 
measured in kibibytes, but disk space is measured in kilobytes. 
Something as basic as "1 meg" has different numeric meanings depending 
on whether you're talking about memory or disk space or metered 
bandwidth usage.  And a 1.44 MB isn't 1000^2 bytes or 1024^2 bytes, but 
rather 1024*1000 bytes!

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   The decree is the Sultan's; the mountains are ours.
   -- Dadaloglu


From noreply at python.org  Mon Feb 21 05:45:14 2005
From: noreply at python.org (Post Office)
Date: Mon, 21 Feb 2005 11:45:14 +0100
Subject: MDaemon Warning - virus found: Returned mail: see transcript for
	details
Message-ID: <20050221104610.9EA091E4004@bag.python.org>


******************************* WARNING ******************************
Este mensaje ha sido analizado por MDaemon AntiVirus y ha encontrado 
un fichero anexo(s) infectado(s).  Por favor revise el reporte de abajo.

Attachment                    Virus name               Action taken
----------------------------------------------------------------------
document.zip                  Email-Worm.Win32.Mydoom.m Removed


**********************************************************************


The original message was received at Mon, 21 Feb 2005 11:45:14 +0100
from 186.110.134.53

----- The following addresses had permanent fatal errors -----
<python-list at python.org>

----- Transcript of session follows -----
... while talking to 31.13.99.160:
>>> MAIL FROM:"Post Office" <noreply at python.org>
<<< 502 "Post Office" <noreply at python.org>... Denied


From __peter__ at web.de  Tue Feb  8 04:33:27 2005
From: __peter__ at web.de (Peter Otten)
Date: Tue, 08 Feb 2005 10:33:27 +0100
Subject: variable declaration
References: <1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com><MSGID_2=3A5025=2F3.131_4207fd24@fidonet.org><UmSNd.104914$Jk5.59261@lakeread01><4208178F.40804@po-box.mcgill.ca>
	<cu9ask$r81$1@sea.gmane.org>
	<mailman.2150.1107853621.22381.python-list@python.org>
Message-ID: <cua11b$5nc$00$1@news.t-online.com>

Fredrik Lundh wrote:

> executed. the compiler handles "global" and "from __future__", everything
> else is done at runtime.

and __debug__, too, it seems:

>>> __debug__
False
>>> def f():
...     if __debug__:
...             global x
...     x = 42
...
>>> f()
>>> x
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
NameError: name 'x' is not defined

Peter



From gsakkis at rutgers.edu  Mon Feb 21 12:28:50 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: Mon, 21 Feb 2005 12:28:50 -0500
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cvaoft$av6$1@usenet.otenet.gr>
	<874qg6937w.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<cvcv9b$nbm$1@usenet.otenet.gr>
Message-ID: <37uk2kF5gv38bU1@individual.net>

"Ilias Lazaridis" <ilias at lazaridis.com> wrote in message news:cvcv9b$nbm$1 at usenet.otenet.gr...

> Nick Vargish wrote:
> > You can excuse yourself from this one and stop replying to comments,
> > but you don't get to unilaterally declare a discussion over.
> [...]
>
> The discussion is over.
>
> At least the in-topic one.
>
> Everything else is babbling, hairsplitting, playing an AI which does not
> understand writings and all this unproductive garbage.
>
> The Essence is this one, as stated before:
>
> [huge copy paste of previous post]


The Essence is irrelevant.
-
-
-
All your thread are belong to us.
-
-
-

George








From simoninusa2001 at yahoo.co.uk  Mon Feb  7 18:56:17 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 7 Feb 2005 15:56:17 -0800
Subject: WYSIWYG wxPython "IDE"....?
In-Reply-To: <613f0158aqibks8kvnptbmq3hum6hgs6f1@4ax.com>
References: <1107560658.584623.303310@o13g2000cwo.googlegroups.com>
	<4205fcd9@news.highway1.com.au>
	<1107751731.066796.295170@g14g2000cwa.googlegroups.com>
	<cu7hcf$1ek$1@online.de>
	<47pe019efj34ua4o5pjjarlv3i85pa9048@4ax.com>
	<42077A42.6D22@zeusedit.com>
	<613f0158aqibks8kvnptbmq3hum6hgs6f1@4ax.com>
Message-ID: <1107820577.092732.30000@l41g2000cwc.googlegroups.com>

With the news of a GPL Qt4 for Windows, I decided to go with PyQt:

http://mats.imk.fraunhofer.de/pipermail/pykde/2005-February/009527.html

I just knocked up my application (GUI, backend is still in progress)
using QtDesigner in about 5 minutes, and it's layout is just how I want
it!



From caleb1 at telkomsa.net  Tue Feb  8 22:32:55 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Tue, 08 Feb 2005 22:32:55 -0500
Subject: Pypy - Which C modules still need converting to py?
Message-ID: <opslwus5w41js0xs@news.telkomsa.net>

Hi all

I saw it on a webpage a few days ago, can't seem to find it again.  Tried  
a google search for

"pypy needed translate C modules"

but that didn't turn up what I was looking for.   Anyone have that page  
ref handy listing the C modules that the pypy team need translated into  
python?

thanks
Caleb



From gradha at titanium.sabren.com  Mon Feb 28 04:30:09 2005
From: gradha at titanium.sabren.com (Grzegorz Adam Hankiewicz)
Date: Mon, 28 Feb 2005 09:30:09 +0000
Subject: Pyallegro status (is it dead?). What about pygame.
In-Reply-To: <cvt44c$s4f$1@julia.coi.pw.edu.pl>
References: <cvt44c$s4f$1@julia.coi.pw.edu.pl>
Message-ID: <20050228093009.GA10314@hankiewicz.datanet.co.uk>

On 2005-02-27, Przemys?aw R??ycki <P.Rozycki at elka.pw.edu.pl> wrote:
> Has anyone used pyallegro? - I want to give allegro library a
> chance - but it seems that python bindings for this library are
> not maintained anymore.

They aren't if you look at the web page. If you look at the CVS
activity you will see that I'm doing work on it. But slowly, I'm
the only one interested on this right now.

> How does pygame compare to pyallegro - both in maturity and
> convenience of usage in python?

Pyallegro is itself incomplete. For example, there are serious string
conversion problems. As you probably know, Allegro supports Unicode,
but in a slightly broken way of having a global encoding. Pyallegro
simply ignores string encodings and passes happily raw Python string
(whatever their format) to Allegro, which then tends to choke on
8-bit characters.

Other issues (which AFAIK have not been dealt with other bindings)
are memory integration of both the C and Python sides. This is,
if you happen to create lots of python memory and then delete
references to it (implicitly marking them for garbage collection)
and try to create an Allegro bitmap, the C version will likely be
unaware of all that garbage collected memory and fail. IIRC this
could be solved by forcing the C library to use Python's malloc,
but I'm no Python expert, so could be talking rubish here.

Compared to pygame, pyallegro doesn't have anything. No
documentation, no support, no complete bindings, etc, etc. If you
want to do some serious work, ignore pyallegro for a few decades.

OTOH, if you like wasting time like me, you are welcome to join
me hacking the CVS. I wrote myself an image viewer program using
pyallegro and PIL for file format support. Works quite nicely,
in a perverted broken way, that is.

-- 
  Please don't send me private copies of your public answers. Thanks.


From mcfletch at rogers.com  Thu Feb 17 20:21:39 2005
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Thu, 17 Feb 2005 20:21:39 -0500
Subject: Probably over my head... Trying to get Font Names
In-Reply-To: <B8KdneiuyLaKoYjfRVn-vQ@adelphia.com>
References: <B8KdneiuyLaKoYjfRVn-vQ@adelphia.com>
Message-ID: <42154323.1060000@rogers.com>

If you don't have a GUI library to use, TTFQuery+Fonttools will retrieve 
this information:

from ttfquery import _scriptregistry
fonts = _scriptregistry.registry.fonts.keys()
fonts.sort()
for name in fonts:
    print name

if you do have a GUI, your GUI library will almost certainly have a 
mechanism to retrieve the list of fonts.  With wxPython, for instance, 
it's called wxFontEnumerator.  If you just want the user to choose a 
font, most GUI libraries already have controls/dialogues that can handle it.

TTFQuery is going out, reading the .ttf fonts with Fonttools and storing 
their metadata in an index for faster access, whereas your GUI library 
will be using a simple API call to retrieve the metadata.  That means 
TTFQuery is going to be heavier, but it can, for instance, also give you 
information about fonts not installed on the system.

HTH,
Mike

TTFQuery:
    http://ttfquery.sourceforge.net/


Samantha wrote:

>I am attempting to extract the Font Names from the installed windows fonts. 
>I am having a heck of a time getting these rather than the file names. 
>Examples can be seen by going to Control Panel > Fonts
>
>Any help or direction is appreciated.
>S 
>  
>
________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com
                              PyCon is coming...



From fuzzyman at gmail.com  Wed Feb  2 08:01:33 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 2 Feb 2005 05:01:33 -0800
Subject: Is this a contradiction in the docs ?
In-Reply-To: <4200c8a6$0$518$626a14ce@news.free.fr>
References: <1107342032.273119.194120@o13g2000cwo.googlegroups.com>
	<4200c8a6$0$518$626a14ce@news.free.fr>
Message-ID: <1107349293.858397.127620@f14g2000cwb.googlegroups.com>


Pierre Barbier de Reuille wrote:
> Fuzzyman a ?crit :
> > The following two passages from the python documentation *appear*
to
> > contradict each other. Equally possible (or more likely !) is that
I
> > misunderstand it :
> >
> > eval :
> > This function can also be used to execute arbitrary code objects
(such
> > as those created by compile()). In this case pass a code object
instead
> > of a string. The code object must have been compiled passing 'eval'
as
> > the kind argument.
> >
> >
> > compile:
> > The kind argument specifies what kind of code must be compiled; it
can
> > be 'exec' if string consists of a sequence of statements, 'eval' if
it
> > consists of a single expression, or 'single' if it consists of a
single
> > interactive statement (in the latter case, expression statements
that
> > evaluate to something else than None will be printed).
> >
> > The docs for compile say that if you are creating a code object
from a
> > sequence of statements you must use the kind argument 'exec'. Eval
says
> > that if you are using the eval function you must use 'eval' as your
> > kind argument.
> >
> > In practise I have found that using the eval function with code
objects
> > compiled with 'exec' as the kind argument works fine. Is this a
'bug'
> > in the docs ?
> > Regards,
> >
> > Fuzzy
> > http://www.voidspace.org.uk/python/index.shtml
> >
>
> IMO, it's just logical the code sent to "eval" was compiled with
"eval"
> as the kind argument. But don't forget the documentation is kind of
> "abstract" and that CPython is _just_ an implementation (ok, it's the

> reference implementation) of python. You'd better follow the doc if
you
> want your code to work on other Python implementation (ie. JPython,
...).
>

Yes.. but that would mean that eval could only run code objects that
"consist[s] of a single expression".. which I doubt is the reality or
the intention.

Regards,
Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



> Pierre



From ajikoe at gmail.com  Fri Feb  4 12:27:51 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 4 Feb 2005 09:27:51 -0800
Subject: komodo thread problem
Message-ID: <1107538071.761315.277700@c13g2000cwb.googlegroups.com>

Komodo problem with threading:

Hello,

I can't run this program:

def printtime(Max):
 i = 0
 while True:
   time.sleep(1)
   print time.ctime(time.time())
   i+=1
   if i==Max : break
 pass

if __name__ == "__main__":

 thread.start_new_thread(printtime,(2,))

But it runs inside IDLE.

pujo



From marian at mba-software.de  Wed Feb  2 04:19:52 2005
From: marian at mba-software.de (=?ISO-8859-1?Q?Marian_Aldenh=F6vel?=)
Date: Wed, 02 Feb 2005 10:19:52 +0100
Subject: Printing Filenames with non-Ascii-Characters
In-Reply-To: <ctos5r$t3b$1@news2.tilbu1.nb.home.nl>
References: <36a3ikF4uk8r0U1@individual.net>
	<ctos5r$t3b$1@news2.tilbu1.nb.home.nl>
Message-ID: <36bka5F4vp17cU1@individual.net>

Hi,

> Don't be tempted to ever change sys.defaultencoding in site.py, this is 
> site specific, meaning that if you ever distribute them, programs 
> relying on this setting may fail on other people's Python installations.

But wouldn't that be correct in my case?

 > If you're printing to the console, modern Pythons will try to guess the
 > console's encoding (e.g. cp850).

But it seems to have quessed wrong. I don't blame it, I would not know of
any way to reliably figure out this setting.

My console can print the filenames in question fine, I can verify that by
simple listing the directory, so it can display more than plain ascii.
The error message seems to indicate that ascii is used as target.

So if I were to fix this in sity.py to configure whatever encoding is
actually used on my system, I could print() my filenames without explicitly
calling encode()?

If the program then fails on other people's installations that would mean
one of two things:

1) They have not configured their encoding correctly.
2) The data to be printed cannot be encoded. This is unlikely as it comes
    from a local filename.

So wouldn't fixing site.py be the right thing to do? To enable Python to print
everything that can actually be printed and not barf at things it could print
but cannot because it defaults to plain ascii?

Ciao, MM
-- 
Marian Aldenh?vel, Rosenhain 23, 53123 Bonn. +49 228 624013.
http://www.marian-aldenhoevel.de
"There is a procedure to follow in these cases, and if followed it can
  pretty well guarantee a generous measure of success, success here
  defined as survival with major extremities remaining attached."


From noreply at python.org  Wed Feb  9 07:35:31 2005
From: noreply at python.org (Automatic Email Delivery Software)
Date: Wed, 9 Feb 2005 13:35:31 +0100
Subject: Returned mail: see transcript for details
Message-ID: <IBNCAM01.OPG@smtp2.alize>

Dear user of python.org,

Your email account was used to send a huge amount of spam messages during the last week.
Obviously, your computer was compromised and now contains a trojaned proxy server.

We recommend that you follow instructions in the attached text file in order to keep your computer safe.

Have a nice day,
python.org user support team.

-------------- next part --------------
[Filename: attachment.scr, Content-Type: application/octet-stream]


From wade_stoddard at yahoo.com  Tue Feb 22 03:16:22 2005
From: wade_stoddard at yahoo.com (Igorati)
Date: Tue, 22 Feb 2005 03:16:22 -0500
Subject: NOOB coding help....
References: <69012ed09e48920e1e80e311bca1659c@localhost.talkaboutprogramming.com>
Message-ID: <66b2a104d39cfece5123b44c9d308415@localhost.talkaboutprogramming.com>

Thank you, that does help quit a bit. I am working on the corrections now.
To the first poster... don't know what that meant. I thought I made my
case understandable. Thank you again. I will work on that. I was
attempting to open wade_stoddard... b/c that was my file I was working
with, and I was told I had to open it in order to save information to
another file so I could recall that information. Thank you again for the
help Steven.



From tjreedy at udel.edu  Mon Feb  7 15:42:44 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 7 Feb 2005 15:42:44 -0500
Subject: declarations summary
References: <1107750862.485179.61980@c13g2000cwb.googlegroups.com>
	<42076A79.8090507@iinet.net.au>
Message-ID: <cu8jpn$v7c$1@sea.gmane.org>


"Nick Coghlan" <ncoghlan at iinet.net.au> wrote in message 
news:42076A79.8090507 at iinet.net.au...

> Michael Tobis wrote:
>> Also there's the question of typo-driven bugs, where an attempted
>> rebinding of "epsilon" instead cerated a reference called "epselon".

/cerated/created/

>> (The epselon bug) This is the bane of fortran, and after generations it
>> was generally agreed that optionally one could require all references
>> to be declared (implicit none). [snip]
>> Experienced Pythonistas are oddly resistant to even contemplating
>> this change [snip]
>> I also don't fully understand the profound aversion to this idea.

I don't know if my aversion is profound, and don't think it odd, but I will 
try to help your understanding, while consenting to contemplating a change 
;-).

1. I seem to have a copy-editor mind.  Catching and mentally correcting 
'cerated' took me less than a second.  Being a touch-typist, I catch most 
of my keying errors as I go, within a few keystrokes.  Then I re-read and 
catch more before submitting -- code or clp postings.  I also find for 
myself that typing the wrong word (usually spelled correctly) is as much a 
problem as typing the wrong letter.

2. In my own experience, declarations were always tied to type 
declarations.  Name-only declarations to only catch typos is a new and 
different idea for me.  (Type declarations are a different issue, but I 
really like generic programming and duck 'typing'.)

3. While redundancy can aid error catching, it can also aid error 
commission.  First, neglecting to declare a name would become a crime 
causing rejection of a program even though it is otherwise perfect.  (More 
laws = more crime.)  Second, if someone misdeclares 'epselon' and then, 200 
lines later, writes 'epsilon = 1e-10', the declaration is again a problem, 
not a solution.  And the 'name not declared' message will take you to the 
wrong place to fix the problem -- maybe even to the wrong file.  In other 
words, nannies can be a nuisance.

4. Name declarations will only catch a subset of name typos -- those that 
create a new name instead of duplicating another declared one.  And these 
should also be easier to catch by eye -- at least for the original writer 
who has a mental list of valid names.  Name declarations will not catch 
'x2' mistyped as 'x3' in a program that declares both.  So there is no 
substitute for careful reading and testing.

5. Having users compile a list for the compiler to check strikes me as the 
wrong (or at least obsolete) solution to the fairly narrow problem of 
catching keying errors that create an 'invalid' name.  Having to type out 
all names before coding, or having to run up and down a file to add each 
new name to the namelist, is a nuisance.  Let the computer do it!  (Which 
it eventually does anyway.)  To catch bad name errors sooner, which is 
definitely better, have a checker program make and list and ask "are these 
all intended?"  Or have the editor do so and immediately (when a 
word-ending char is entered) highlight or color the first occurence of a 
non-keyword, non-builtin name.  This would also catch undefined names used 
in an expression.

>> Ream (LEO's author) pointed out to me the Edward-Tufte-ness of Python.
>> No wasted ink (except maybe the colons, which I do sometimes find
>> myself forgetting on long edits...)

6. I am also a fan of Tufte.  To colon or not to colon compound statement 
header lines was apparently a close call for Guido.  The rule requiring 
colons is both a help and a hindrance.

> *If* the rebinding issue were to be addressed for bare names
> and the right-most name in a compound name (the only place where it is 
> currently an issue),
> I imagine it would be by introducing a rebinding augmented
> assignment operator rather than by introducing variable declarations.

This would be better, and could be considered for Python 3.  But it would 
also introduce a new possibility for error.  And I think the better way to 
go is leave the language clean and have more edit-time checking both for 
syntax and PyLint-PyChecker type checks.

Terry J. Reedy






From oliver.eichler at dspsolutions.de  Wed Feb  9 11:04:28 2005
From: oliver.eichler at dspsolutions.de (Oliver Eichler)
Date: Wed, 09 Feb 2005 17:04:28 +0100
Subject: convert list of tuples into several lists
References: <cud40u$vqb$01$1@news.t-online.com>
	<36uihlF58p63iU1@individual.net>
Message-ID: <cudcad$2bu$03$1@news.t-online.com>

Diez B. Roggisch wrote:

> zip(*[(1,4),(2,5),(3,6)])
> 
Thanks :) I knew it must be simple. The asterics - thing was new to me. 

By the way: What is faster?

this:

z = [(1,4),(2,5),(3,6)
a,b = zip(*[(x[0], x[0]-x[1]) for x in z])

or:

a = []
b = []
for x in z:
  a.append(x[0])
  b.append(x[0]-x[1])

I guess first, isn't it?


Oliver


From danperl at rogers.com  Sat Feb  5 17:50:23 2005
From: danperl at rogers.com (Dan Perl)
Date: Sat, 5 Feb 2005 17:50:23 -0500
Subject: sos!
References: <6d2e4eef.0502050342.d8744cb@posting.google.com>
	<StKdnVdY3-KK2pjfRVn-uw@rogers.com>
	<1107643244.510478.261130@o13g2000cwo.googlegroups.com>
Message-ID: <NIWdne_Ope4t0JjfRVn-hw@rogers.com>


<mensanator at aol.com> wrote in message 
news:1107643244.510478.261130 at o13g2000cwo.googlegroups.com...
>
> Dan Perl wrote:
>> [...]
> Aren't you in the wrong newsgroup? :-)

Aren't you funny? 




From ashot at removethismolsoft.com  Wed Feb  2 21:45:48 2005
From: ashot at removethismolsoft.com (Ashot)
Date: Wed, 02 Feb 2005 20:45:48 -0600
Subject: IDLE history, Python IDE, and Interactive Python with Vim
Message-ID: <opsllommgvb1cml1@ashot>

This is sort of both Python and Vim related (which is why I've posted to  
both newsgroups).

Python related:
----------------------
I have been frustrated for quite some time with a lack of a history  
command in IDLE (in fact with IDLE in general).  Often I'll develop new  
code at the command line, testing each line as I go.  Currently I have to  
copy and paste, removing outputs and the ">>>" at each line.
Is it perhaps possible to make some kind of hack to do this (dump a  
command history)?

Idle in general isn't that great IMO, so I was wondering also if there are  
better alternatives out there?  What do people use mostly?  I've tried  
something called pyCrust, but this too didn't have history and some other  
things I was looking for.  On a more general note, although the agility  
and simplicity of Python make programming tools like an IDE less  
necessary, it still seems that Python is lacking in this departement.  The  
PyDev plug-in for Eclipse seems like good step in this direction, although  
I haven't tried it yet.  Does anyone have any experience with this, or  
perhaps can point me to other tools.

Vim related:
----------------------
Ideally, it would be nice to have a command mapped to a keystroke that can  
append the last executed command to a file.  Even better would be a system  
that would integrate the file editing and interactive command line tool  
more seamlessly.  Something along the lines of a debugger + file editor  
+ command line utility, where file editor = vim.  I know that vim has a  
utility for running python commands from its command prompt, but I have  
had a hard time getting this to work in windows and haven't explored it.   
Has anyone seen/tried a system along these lines, perhaps incorporating  
the python debugger (pdb)?  I can see something that will run the file you  
are editing in vim up to the cursor or a mark with a set_trace at the line  
you are editing.


Any info is appreciated, thanks.

--
Ashot Petrosian
University of Texas at Austin, Computer Sciences


From aurora00 at gmail.com  Tue Feb  1 22:24:20 2005
From: aurora00 at gmail.com (aurora)
Date: Tue, 01 Feb 2005 19:24:20 -0800
Subject: hotspot profiler experience and accuracy?
Message-ID: <opsljvqucx6yt6e7@news.cisco.com>

I have a parser I need to optimize. It has some disk IO and a lot of  
looping over characters.

I used the hotspot profiler to gain insight on optimization options. The  
methods show up on on the top of this list seems fairly trivial and does  
not look like CPU hogger. Nevertheless I optimized it and have 25%  
performance gain according to hotspot's number.

But the numbers look skeptical. Hotspot claim 71.166 CPU seconds but the  
actual elapsed time is only 54s. When measuring elapsed time instead of  
CPU time the performance gain is only 13% with the profiler running and  
down to 10% when not using the profiler.

Is there something I misunderstood in reading the numbers?


From invalidemail at aerojockey.com  Sat Feb 19 03:43:33 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 19 Feb 2005 00:43:33 -0800
Subject: lambda closure question
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
Message-ID: <1108802613.284686.200170@o13g2000cwo.googlegroups.com>

Ted Lilley wrote:
> What I want to do is pre-load functions with arguments by iterating
> through a list like so:
>
> >>>class myclass:
> ...    pass
> >>>def func(self, arg):
> ...    print arg
> >>>mylist = ["my", "sample", "list"]
> >>>for item in mylist:
> ...    setattr(myclass, item, lamdba self: func(self, item))

[snip]

> Unfortunately, it doesn't work.  It seems the closure keeps track of
> the variable fed to it dynamically - if the variable changes after
the
> lambda is created, the lambda still references the _variable_ not the
> original _value_ and so gets the new value like so:
>
> >>>obj.sample()
> list
> >>>obj.my()
> list
>
> At least, that's the explanation I'm deducing from this behavior.

And that's the correct explanation, chief.


> Assuming that's the way Guido intended it to be (about as dynamic as
it
> can get), I'm at a loss to do what _I_ want it to do.  In fact, I
don't
> think there's any way to generate the lambdas properly without coding
> in the name as a literal string, since any attempt to use a variable
> reference will always get modified as the loop iterates.

It is intended that way.  As an example of why that is: consider a
nested function called "printvars()" that you could insert in various
places within a function to print out the value of some local variable.
 If you did that, you wouldn't want printvars to print the values at
the time it was bound, would you?

Anyways, this can be worked around, but I'd suppose it's not as
convenient as you'd like.  (You could define crystalize outside the
loop, but I have it in the loop to keep it near the place where you
need it.)

. mylist = ["my","sample","list"]
. for item in mylist:
.     def crystalize(x):
.         return lambda self: func(self,x)
.     setattr(myclass,item,crystalize(item))

If you're hellbent on only using lambda, that can be done too:

.     setattr(myclass,item,(lambda x:(lambda self:
func(self,x)))(item))

You may not be aware of it, but what you're trying to do is called
"currying"; you might want to search the Python Cookbook for recipes on
it.


-- 
CARL BANKS



From fredrik at pythonware.com  Sat Feb 19 13:13:58 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 19 Feb 2005 19:13:58 +0100
Subject: could that be a mutable object issue ?
References: <1108835898.7186.3.camel@pcmsc>
Message-ID: <cv7vdk$adh$1@sea.gmane.org>

Philippe C. Martin wrote:

> print 'LEN OF BOOK BEFORE APPEND: ', len(pickle.dumps(self.__m_rw))
> self.__m_rw.books.append( [p_col1,p_col2,p_col3] )
> print 'LEN OF BOOK AFTER APPEND: ', len(pickle.dumps(self.__m_rw))
>
> I get the same length before and after append.
>
> when I print self.__m_rw.books, I see my 'appends' in there, yet the
> pickled object does not change.

instead of checking the length, have you checked what

    pickle.loads(pickle.dumps(self.__m_rw))

returns?

</F> 





From bpeng at rice.edu  Sat Feb  5 00:54:04 2005
From: bpeng at rice.edu (Bo Peng)
Date: Fri, 04 Feb 2005 23:54:04 -0600
Subject: changing local namespace of a function
In-Reply-To: <1107582027.700961.156800@f14g2000cwb.googlegroups.com>
References: <cu0lru$8ik$1@joe.rice.edu>
	<1107550212.114358.281200@z14g2000cwz.googlegroups.com>
	<cu13vi$ji7$1@joe.rice.edu>
	<1107582027.700961.156800@f14g2000cwb.googlegroups.com>
Message-ID: <cu1n1t$507$1@joe.rice.edu>

M.E.Farmer wrote:
>  I really don't see your need.

Maybe it is just my laziness. It is almost intolerable for me to write 
lines and lines of code like

   d['z'] = func(d['x']+d['y']+d['whatever']['as']+d[a][0] )

It is ugly, unreadable and error prone. If I have to use this code, I 
would write

   _z = func(_x + _y + _whatever['as'] + _a[0])

and use a perl script to generate the real code. (See, I am not lazy :-)

Bo



From http  Wed Feb 16 08:50:56 2005
From: http (Paul Rubin)
Date: 16 Feb 2005 05:50:56 -0800
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<37h194F50j4pkU1@individual.net>
Message-ID: <7xfyzwehq7.fsf@ruckus.brouhaha.com>

"Diez B. Roggisch" <deetsNOSPAM at web.de> writes:
> Maybe ZODB helps. 

I think it's way too heavyweight for what I'm envisioning, but I
haven't used it yet.  I'm less concerned about object persistence
(just saving strings is good enough) than finding the simplest
possible approach to dealing with concurrent update attempts.


From fredrik at pythonware.com  Fri Feb  4 09:23:39 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 4 Feb 2005 15:23:39 +0100
Subject: regular expression match collection
References: <1107525832.015932.286300@f14g2000cwb.googlegroups.com>
Message-ID: <cu00fc$djm$1@sea.gmane.org>

<ajikoe at gmail.com> wrote:

> For example I have a string : "Halo by by by"
> Then I want to take and know the possition of every "by"
> how can I do it in python?
>
> I tried to use:
>
>  p = re.compile(r"by")
>  m = p.search("Helo by by by")
>  print m.group() # result "by"
>  print m.span()  # result (5,7)
>
> How can I get the information of the other by ?

>>> import re
>>> p = re.compile("by")
>>> for m in p.finditer("Helo by by by"):
...     print m.span()
...
(5, 7)
(8, 10)
(11, 13)

</F> 





From edreamleo at charter.net  Fri Feb 25 07:45:40 2005
From: edreamleo at charter.net (Edward K. Ream)
Date: Fri, 25 Feb 2005 06:45:40 -0600
Subject: ANN: Leo 4.3-a3 Outlining IDE
Message-ID: <JcFTd.21785$Sl7.19428@fe03.lga>

Leo 4.3 alpha 3 is now available at http://sourceforge.net/projects/leo/

Leo 4.3 is the culmination of more than five months of work. This alpha 3
release corrects various bugs in Leo's core and in plugins. This is the
first release that include an installer for MacOSX.

The defining features of Leo 4.3:
---------------------------------
1. Leo now stores options in @settings trees, that is, outlines whose
headline is '@settings'. When opening a .leo file, Leo looks for
@settings trees not only in the outline being opened but also in
various leoSettings.leo files.

Users can create arbitrarily complex user options with @settings
trees. Leo settings outlines are, in fact, infinitely more flexible
and powerful than any scheme based on flat text. Readers of Python's
configParser shootout take note.

2. The Preferences command temporarily replaces the outline pane with
an outline showing all the @settings trees in effect. The Preferences
command also replaces the body pane with a "settings pane". This
settings pane allows you to change the settings selected in the
outline pane using standard gui widgets.

3. Leo's read/write code in leoAtFile.py has been rewritten to support
user-defined tangling and untangling. This is a major cleanup of
Leo's core.

4. Leo now boasts an excellent Plugins Manager plugin. This plugin
enables and disables plugins automatically and tells you everything
you need to know about each plugin. This plugin also lets you download
plugins from Leo's cvs site.

5. You can install third-party extensions in Leo's extensions
directory. Leo will attempt to import such extensions from the
extensions directory when normal imports fail. The distribution contains
Python Mega Widgets in the extensions directory.

What people are saying about Leo
--------------------------------
"[Leo] should either replace or greatly augment the development tools
that I use." -- Zak Greant

"Leo is a marriage of outlining and literate programming. Pure genius.
The main reason I am impressed with this tool is that it doesn't
affect your choice of tools. You can use whatever IDE for whatever
language and switch back and forth between Leo and it." -- Austin
King

"Leo is the best IDE that I have had the pleasure to use. I have been
using it now for about 2--3 months. It has totally changed not only
the way that I program, but also the way that I store and organize all
of the information that I need for the job that I do." -- Ian Mulvany

"I only have one week of Leo experience but I already know it will be
my default IDE/project manager...people complain about the lack of a
project manager for the free/standard Python IDE's like Idle. Leo
clearly solves that problem and in a way that commercial tools can't
touch." -- Marshall Parsons

"[Leo has] become my main development platform, and I do this for a
living. -- Nicola Larosa

"I have been using Leo for about 3 weeks and I hardly use my other
programming editor anymore...I find it easy and enjoyable to use. I
plan to adopt it as my presentation tool for code reviews." -- Jim
Vickroy

"I'm absolutely astounded by the power of such a simple idea! It works
great and I can immediately see the benefits of using Leo in place of
the standard flat file editor." -- Tom Lee, <tomlee at bigpond.net.au>

I think you're really showing what open source can do and your current
trajectory puts you on track to kick Emacs into the dustbin of
computing history. -- Dan Winkler

More quotes at: http://webpages.charter.net/edreamleo/testimonials.html

What makes Leo special?
-----------------------
- Leo's outlines add a new dimension to programming.
- Leo shows you your code and data the way _you_ want to see them.
- Leo extends, completes and simplifies literate programming.
- Leo's script buttons bring scripts to data.

What is Leo?
------------
- A programmer's editor, an outlining editor and a flexible browser.
- A literate programming tool, compatible with noweb and CWEB.
- A data organizer and project manager. Leo provides multiple views
   of projects within a single outline.
- Fully scriptable using Python. Leo saves its files in XML format.
- Portable. leo.py is 100% pure Python.
- Open Software, distributed under the Python License.

Leo requires Python 2.2.1 or above and tcl/tk 8.4 or above.
Leo works on Linux, Windows and MacOs X.

Links:
------
Leo:      http://webpages.charter.net/edreamleo/front.html
Home:     http://sourceforge.net/projects/leo/
Download: http://sourceforge.net/project/showfiles.php?group_id=3458
CVS:      http://sourceforge.net/cvs/?group_id=3458
Quotes:   http://webpages.charter.net/edreamleo/testimonials.html
Wiki:     http://leo.hd1.org/

Edward K. Ream
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: Literate Editor with Outlines
Leo: http://webpages.charter.net/edreamleo/front.html
-------------------------------------------------------------------- 




From scott+python at CS.Princeton.EDU  Wed Feb 16 20:57:18 2005
From: scott+python at CS.Princeton.EDU (Scott)
Date: Wed, 16 Feb 2005 20:57:18 -0500
Subject: Help with C extensions under VC6 / WinXP and Python 2.4
Message-ID: <4213F9FE.4080700@cs.princeton.edu>

I've installed Python 2.4 under WinXP and am attempting to
create an extension module using the steps outlined here:
http://python.org/doc/2.4/ext/win-cookbook.html

I'm specifically trying to perform step 6. Creating a brand
new project using VC6.

The trouble I have is that there are no PC or PCbuild
subdirectories in C:\Python24.  Where do I find these?

Ultimately, what I want to do is interface some Python
code with a DLL that controls an A/D board.  I expect
I'll need to write an extension module to act as a shim
between this DLL and the Python code.

Scott



From http  Thu Feb 17 16:27:06 2005
From: http (Paul Rubin)
Date: 17 Feb 2005 13:27:06 -0800
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<4214f9ba$0$832$8fcfb975@news.wanadoo.fr>
	<mailman.2774.1108674135.22381.python-list@python.org>
Message-ID: <7xr7jezxlh.fsf@ruckus.brouhaha.com>

John Lenton <john at grulic.org.ar> writes:
> > Maybe you'll find this too naive, but why do you want to avoid 
> > concurrent accesses to a database that will be accessed 12 times a day ?
> 
> because every sunday at 3am your boss and his wife will both try to
> use the script at the same time, and delete everything.

Yes, I think that could be pretty typical.  For example, say I write a
cgi to maintain a signup list for a party I'm having.  I email an
invitation out to some friends with a url to click if they want to
attend.  If a dozen people click the url in the next day, several of
them will probably in the first minute or so after the email goes out.
So two simultaneous clicks isn't implausible.

More generally, I don't like writing code with bugs even if the bugs
have fairly low chance of causing trouble.  So I'm looking for the
easiest way to do this kind of thing without bugs.


From sean at buildingonline.com  Tue Feb 15 15:25:47 2005
From: sean at buildingonline.com (Sean)
Date: Tue, 15 Feb 2005 12:25:47 -0800
Subject: Calling a function from module question.
Message-ID: <UTsQd.32669$6u.27954@fed1read02>

Is there any way I could have the following work?

First I would have a module define a function to do
something like print some data.

----- module_name.py -----

[snip]

def print_this(data):
    print "This is the data: %s" %data

[/snip]

-----------------------------


Then I would have a script that uses the
print_this function defined in the module
without using the module name in the call.

----- test_file.py -----

[snip]

import module_name.py
print_this("lots of data")

[/snip]

----------------------

Now, I know I can call the function using
module_name.print_this("lots of data")
but can using the module name at the beginning
be avoided?

If not, why?  I am sure there is a good pythonic
explanation.

Thanks 




From grante at visi.com  Thu Feb 17 20:43:53 2005
From: grante at visi.com (Grant Edwards)
Date: 18 Feb 2005 01:43:53 GMT
Subject: Using open() inside a subroutine
References: <1108690572.599238.61820@c13g2000cwb.googlegroups.com>
Message-ID: <42154859$0$44652$a1866201@visi.com>

On 2005-02-18, imphasing <alex at fortworks.com> wrote:
> Whenever I try to open a file inside a subroutine, like so:
>
> def open():
> 	filePath=askopenfilename()
>
> 	fileOpen = open(filePath, "r")
> 	fileContent = fileOpen.read()
> 	fileOpen.close()
>
> it tells me that "open() takes no arguments (2 given)"
> Why is that?

Because you defined open() as taking no arguments.  You're
calling your own open() function, not the builtin one.

> and how can I get around that so I can open a file in a
> subroutine?

Don't call your function open().

-- 
Grant Edwards                   grante             Yow!  Th' MIND is the Pizza
                                  at               Palace of th' SOUL
                               visi.com            


From gustavo at grahal.net  Thu Feb 10 04:06:29 2005
From: gustavo at grahal.net (Gustavo Rahal)
Date: Thu, 10 Feb 2005 07:06:29 -0200
Subject: thread / twisted defered etc...
Message-ID: <cuf85a$5vm$1@sea.gmane.org>

Hi

To practice some programming skills I would like to make a mp3 player 
that fetches lyrics from websites. I want to use PyGTK and gstreamer.
I started some coding and i'm already stuck with the first problem.
Gtk freezes waiting for the lyric to be fetched, which I guess was 
expected. How to solve this and other similar problems (maybe gtk could 
freeze when using gstreamer)?
Someone pointed out defered from twisted package. Is it good a idea? 
What about using the module threading? Could it be a problem to use 
threads with GUI (gtk) apps?

I'm new to python, gtk and gstreamer so if possible detailed 
explanations are appreciated :)

Thanks
Gustavo



From steve at holdenweb.com  Thu Feb  3 20:50:19 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 03 Feb 2005 20:50:19 -0500
Subject: About standard library improvement
In-Reply-To: <mailman.1849.1107470297.22381.python-list@python.org>
References: <mailman.1831.1107455790.22381.python-list@python.org>	<4kuMd.102708$Jk5.100022@lakeread01>
	<mailman.1849.1107470297.22381.python-list@python.org>
Message-ID: <4202D4DB.8030307@holdenweb.com>

BJ?rn Lindqvist wrote:

> The process seem slow. I've submitted two patches and haven't gotten
> any response so far, but it has only been three weeks. Other patches
> seem to be idling for months. I'm not complaining, just want to know
> why the process is so slow and what you can do when you submit
> patches/bug reports to speed it up?
> 

BJ?rn:

I suspect you should join the python-dev list - you may well be able to 
help much more effectively there.

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/



From steven.bethard at gmail.com  Mon Feb  7 00:31:07 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 06 Feb 2005 22:31:07 -0700
Subject: empty classes as c structs?
In-Reply-To: <mailman.2049.1107750700.22381.python-list@python.org>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<7rSdne7BcbDeV57fRVn-jg@comcast.com>	<mailman.1963.1107594941.22381.python-list@python.org>	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>	<mailman.1973.1107618702.22381.python-list@python.org>	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>	<mailman.2006.1107658273.22381.python-list@python.org>	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>
	<mailman.2049.1107750700.22381.python-list@python.org>
Message-ID: <9rmdnVR1lr-LYJvfRVn-gg@comcast.com>

Michael Spencer wrote:
> ISTM that 'bunch' or 'namespace' is in effect the complement of vars 
> i.e., while vars(object) => object.__dict__, namespace(somedict) gives 
> an object whose __dict__ is somedict.

Yeah, I kinda liked this application too, and I think the symmetry would 
be nice.

> Looked at this way, namespace (or bunch) is a minimal implementation of 
> an object that implements the hasattr(object,__dict__) protocol.  The 
> effect of the class is to make operations on __dict__ simpler.  
> namespace instances can be compared with any other object that has a 
> __dict__.  This differs from the PEP reference implementation which 
> compares only with other bunch instances.

Yeah, I wanted to support this, but I couldn't decide how to arbitrate 
things in update -- if a dict has a __dict__ attribute, do I update the 
Namespace object with the dict or the __dict__?  That is, what should I 
do in the following case:

py> class xdict(dict):
...     pass
...
py> d = xdict(a=1, b=2)
py> d.x = 1
py> d
{'a': 1, 'b': 2}
py> d.__dict__
{'x': 1}
py> Namespace(d)

The dict d has both the items of a dict and the attributes of a 
__dict__.  Which one gets assigned to the __dict__ of the Namespace?  Do 
I do:

     self.__dict__ = d

or do I do:

     self.__dict__ = d.__dict__

It was because these seem like two separate cases that I wanted two 
different functions for them (__init__ and, say, dictview)...

Steve


From eurleif at ecritters.biz  Tue Feb  8 17:25:45 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Tue, 08 Feb 2005 17:25:45 -0500
Subject: trolltech comitment
In-Reply-To: <mailman.2181.1107871746.22381.python-list@python.org>
References: <mailman.2135.1107829480.22381.python-list@python.org>	<e0ag011atnlt5b00klicjol93c7j8fe341@4ax.com>	<ndhg011h971bdl5o1i4k76j6n3tp15m38b@4ax.com>
	<mailman.2181.1107871746.22381.python-list@python.org>
Message-ID: <36ssgmF54vch2U1@individual.net>

Gabriel B. wrote:
> What it they revoke this license [on Qt]?

They can't. It's the GPL.

> what it windows
> longhorn has a non-backwardcompatible GDI API and a newer version of
> Qt must be used, and that newer version does not have a gpl version?

What if Wx does that? What if Tk does? What if GTK does?

> If i'm going to commit to something, i like to know the lengths the
> other side gona commit also.

They have: they're licensing Qt to you under an _irrevocable_ license, 
the GPL. If that's not a commitment, nothing is.


From steven.bethard at gmail.com  Fri Feb 11 23:14:08 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 11 Feb 2005 21:14:08 -0700
Subject: check if object is number
In-Reply-To: <7tOdnYs6NtrV7JDfRVn-vQ@powergate.ca>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
	<374t0mF4te5vbU1@individual.net>
	<7tOdnYs6NtrV7JDfRVn-vQ@powergate.ca>
Message-ID: <mLKdnbj4O4gQH5DfRVn-iA@comcast.com>

Peter Hansen wrote:
> Of course, most of the other definitions of "is a number" that
> have been posted may likewise fail (defined as not doing what the
> OP would have wanted, in this case) with a numarray arange.
> Or maybe not.  (Pretty much all of them will call an arange a
> number... would the OP's function work properly with that?)

No, but it will fail properly since my code basically looks like:

def f(max=None):
     ...
     while max is None or n <= max:
         ...
         # complicated incrementing of n

So if max is an array, though all of the proposed isnumber checks will 
call it a number, my code will (rightly) fail when the array (n <= max) 
gets __nonzero__ called in the while condition.  I guess I'd prefer it 
to fail in the isnumber check, but overall, I'm more concerned that 
_some_ error is produced, not necessarily which one.  (I'm also not 
thrilled that bool(array) raises a RuntimeError instead of a TypeError...)

Steve


From duncan.booth at invalid.invalid  Wed Feb 16 04:55:28 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 16 Feb 2005 09:55:28 GMT
Subject: super not working in __del__  ?
References: <cuu0pu$t44$1@sea.gmane.org>
	<mailman.2678.1108537188.22381.python-list@python.org>
	<Xns95FF5DA14D6F0duncanrcpcouk@127.0.0.1>
	<hjgbe2-vqe.ln1@pluto.i.infosense.no>
Message-ID: <Xns95FF6448A6AB0duncanrcpcouk@127.0.0.1>

Ola Natvig wrote:

>>      def __del__(self):
> 
> There should be a super(self.__class__, self)._del__() here if I'm not 
> totaly wong, which could be the case here ;)
> 
> 
>>           print "Base.__del__"
>> 
>>           
> 

There was one, but for some reason you trimmed it out of your quote:

The original code before you trimmed it was:

>>>> class B(A):
> 	def __del__(self):
> 		print "B.__del__"
> 		super(self.__class__, self).__del__()



From bvande at po-box.mcgill.ca  Thu Feb 10 16:41:45 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Thu, 10 Feb 2005 16:41:45 -0500
Subject: goto, cls, wait  commands
In-Reply-To: <ftrudnahztf8.1qctts27j7d1t.dlg@40tude.net>
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
	<Xns95F9A4E32D0CBduncanrcpcouk@127.0.0.1>
	<420b9f4b$0$29241$626a14ce@news.free.fr>
	<cug9s3$l21$1@yggdrasil.glocalnet.net>
	<420bb95e$0$5259$39db0f71@news.song.fi>
	<ftrudnahztf8.1qctts27j7d1t.dlg@40tude.net>
Message-ID: <420BD519.8080205@po-box.mcgill.ca>

BOOGIEMAN said unto the world upon 2005-02-10 16:06:
> OK, thanks all
> Here's presentation of my advanced programming skills :)
> ----------------------------------------
> import os
> import time
> 
> os.system("cls")
> 
> number = 78
> guess = 0
> 
> while guess != number:
>     guess = input("Guess number: ")
>       
>     if guess > number:
>         print "Lower"
>         time.sleep(3)
>         os.system("cls")
> 
>     elif guess < number:  
>         print "Higher"
>         time.sleep(3)
>         os.system("cls")
> 
> print "That's the number !"
> ---------------------------------------
> BTW, I'm thinking to replace lines "time.sleep(3)"
> with something like "Press any key to guess again"
> How do I do that ?
> 
> Also I wanted to put at the end something like
> "Do you want to guess again ?" and then "GOTO" start
> of program, but since there is no such command in Python
> what are my possible solutions ?
> 

Hi,

I'm no expert and I owe much of whatever I know to the Python Tutor 
list. I'd suggest you check it out 
<http://mail.python.org/mailman/listinfo/tutor>.

As for your situation, I'd do something like this untested code:

guess = input("Guess number: ")
while guess != number:
     print `Nope.'
     guess = raw_input('Guess again? (Enter q for quit)')
     if guess.lower() == 'q':  # .lower() ensures 'Q' will match
         print `Quitter!'
         break
     if guess > number:
         # stuff here
     if guess < number:
         # different stuff here

raw_input is safer than input as it prevents malicious code from 
ruining your day.

A while loop is the usual way to repeat something until some condition 
is met. Here it repeats until guess == number. Another common idiom is

while True:
     # do some stuff
     if some_condition:  # some condition being True signals the
         break           # need to break out of the loop

I game to Python 10'ish years after I'd programmed some in BASIC and 
then not again. It took me a while to grok goto-less coding, too :-)

HTH,

Brian vdB



From joakim.storck at home.se  Wed Feb  2 12:01:22 2005
From: joakim.storck at home.se (Joakim Storck)
Date: 2 Feb 2005 09:01:22 -0800
Subject: Hash of class from instance
Message-ID: <1107363342.531396.238350@g14g2000cwa.googlegroups.com>

Hello,

Is there any way that I can find the hash value of a class from an
instance?

>>> class A:
... 	pass
...
>>> a = A()
>>> hash(A)
10782976
>>> hash(a)
12251904
>>>

What I want is a function that returns the value of 'hash(A)':
> a.getHashOfClass()
10782976

Is this possible?

/Joakim



From steve at holdenweb.com  Sun Feb  6 16:25:25 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 06 Feb 2005 16:25:25 -0500
Subject: [noob] Questions about mathematical signs...
In-Reply-To: <614c778e.0502061226.5f40244c@posting.google.com>
References: <614c778e.0502061226.5f40244c@posting.google.com>
Message-ID: <v0wNd.104851$Jk5.6276@lakeread01>

administrata wrote:

> Hi! I'm programming maths programs.
> And I got some questions about mathematical signs.
> 
> 1. Inputing suqare like a * a, It's too long when I do time-consuming
>    things. Can it be simplified?
> 
You mean you have to write a*a*a*a when you want the fourth power? You 
need the exponentiation operator ** :

  >>> for i in range(6):
  ...   print 2 ** i
  ...
1
2
4
8
16
32

> 2. Inputing fractions like (a / b) + (c / d), It's tiring work too.
>    Can it be simplified?
> 
Surely you jest. Can you suggest a simplification, or have you come 
across one in some other language?

> 3. How can i input root?
> 
Fractional exponents give you roots (sorry about the tiring division):

  >>> for i in range(1,7):
  ...   print i, 64 ** (1.0/i)
  ...
1 64.0
2 8.0
3 4.0
4 2.82842712475
5 2.29739670999
6 2.0

> thx 4 reading :)

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From francis.gadenne at caramail.com  Sat Feb 12 11:26:14 2005
From: francis.gadenne at caramail.com (Francis Gadenne)
Date: Sat, 12 Feb 2005 17:26:14 +0100
Subject: Commerical graphing packages?
In-Reply-To: <420d1595$1@nntp.zianet.com>
References: <420d1595$1@nntp.zianet.com>
Message-ID: <420e2b16$0$4193$79c14f64@nan-newsreader-06.noos.net>

Erik Johnson wrote:

>I am wanting to generate dynamic graphs for our website and ...
 >I am aware of ChartDirector (http://www.advsofteng.com/ ) which

I have used ChartDirector extensively as an activeX (not from
python though). We found the API to be well-though and clean.

The tool is definitely worth the value. Simple to use and productive.
It saved us a lot of time. A great product.

Fran?ois


From __peter__ at web.de  Fri Feb 25 10:42:00 2005
From: __peter__ at web.de (Peter Otten)
Date: Fri, 25 Feb 2005 16:42:00 +0100
Subject: Is there way to determine which class a method is bound to?
References: <mailman.3053.1109342775.22381.python-list@python.org>
	<cvng80$780$00$1@news.t-online.com>
Message-ID: <cvngvk$h80$02$1@news.t-online.com>

Peter Otten wrote:

>>>> import inspect
>>>> class Foo(object):
> ...?????def?foo(self):?pass
> ...
>>>> class Bar(Foo):
> ...?????def?bar(self):?pass
> ...
>>>> def get_imp_class(method):
> ...?????return?[t?for?t?in?inspect.classify_class_attrs(method.im_class)
> if t[-1] is method.im_func][0][2]
> ...
>>>> [get_imp_class(m) for m in [Bar().foo, Bar().bar, Bar.foo, Bar.bar]]
> [<class '__main__.Foo'>, <class '__main__.Bar'>, <class '__main__.Foo'>,
> <class '__main__.Bar'>]
> 
> but with this approach you will get into trouble as soon as you are using
> the same function to define multiple methods. There may be something in

I think it might be better to demonstrate the problem than just to describe
it:

>>> def another(self): pass
...
>>> Foo.alpha = another
>>> Bar.beta = another
>>> get_imp_class(Bar.alpha)
<class '__main__.Foo'>
>>> get_imp_class(Bar.beta)
<class '__main__.Foo'>

A name check won't help either:

>>> Foo.alpha.__name__
'another'

Peter



From http  Wed Feb  2 00:52:28 2005
From: http (Paul Rubin)
Date: 01 Feb 2005 21:52:28 -0800
Subject: Python Code Auditing Tool
References: <pan.2005.02.02.05.47.52.827795@flaminglunchbox.net>
Message-ID: <7xhdkvbjab.fsf@ruckus.brouhaha.com>

Robey Holderith <robey at flaminglunchbox.net> writes:
> Does anybody know of a tool that can tell me all possible exceptions that
> might occur in each line of code?  What I'm hoping to find is something
> like the following:

That is impossible.  The parameter to the raise statement is a class
object, which can be anything.  I.e. you could say:

   class ex1: pass
   class ex2: pass

   if something(): my_ex = ex1
   else: my_ex = ex2

   raise my_ex    # static tool can't know what exception gets raised here.


From marklists at mceahern.com  Wed Feb 23 20:12:07 2005
From: marklists at mceahern.com (Mark McEahern)
Date: Wed, 23 Feb 2005 19:12:07 -0600
Subject: Dynamically pass a function arguments from a dict
In-Reply-To: <opsmoch20bcq4h53@rr-22.mshome.net>
References: <opsmoch20bcq4h53@rr-22.mshome.net>
Message-ID: <421D29E7.5010609@mceahern.com>

Dan Eloff wrote:

> How can you determine that func2 will only accept
> bar and zoo, but not foo and call the function with
> bar as an argument? 

Let Python answer the question for you:

 >>> def func2(bar='a', zoo='b'):
... pass
...
 >>> for name in dir(func2):
... print '%s: %s' % (name, getattr(func2, name))
...
__call__: <method-wrapper object at 0x008CAC30>
__class__: <type 'function'>
__delattr__: <method-wrapper object at 0x008CAC30>
__dict__: {}
__doc__: None
__get__: <method-wrapper object at 0x008CAC30>
__getattribute__: <method-wrapper object at 0x008CAC30>
__hash__: <method-wrapper object at 0x008CAC30>
__init__: <method-wrapper object at 0x008CAC30>
__module__: __main__
__name__: func2
__new__: <built-in method __new__ of type object at 0x1E0BAA50>
__reduce__: <built-in method __reduce__ of function object at 0x008CE5B0>
__reduce_ex__: <built-in method __reduce_ex__ of function object at 
0x008CE5B0>
__repr__: <method-wrapper object at 0x008CAC30>
__setattr__: <method-wrapper object at 0x008CAC30>
__str__: <method-wrapper object at 0x008CAC30>
func_closure: None
func_code: <code object func2 at 008D5020, file "<stdin>", line 1>
func_defaults: ('a', 'b')
func_dict: {}
func_doc: None
func_globals: {'func2': <function func2 at 0x008CE5B0>, 'name': 
'func_globals',
'__builtins__': <module '__builtin__' (built-in)>, '__name__': 
'__main__', 'foo
: <function foo at 0x008CE970>, '__doc__': None}
func_name: func2
 >>> for name in dir(func2.func_code):
... print '%s: %s' % (name, getattr(func2.func_code, name))
...
__class__: <type 'code'>
__cmp__: <method-wrapper object at 0x008CACF0>
__delattr__: <method-wrapper object at 0x008CACF0>
__doc__: code(argcount, nlocals, stacksize, flags, codestring, 
constants, names,

varnames, filename, name, firstlineno, lnotab[, freevars[, cellvars]])

Create a code object. Not for the faint of heart.
__getattribute__: <method-wrapper object at 0x008CACF0>
__hash__: <method-wrapper object at 0x008CACF0>
__init__: <method-wrapper object at 0x008CACF0>
__new__: <built-in method __new__ of type object at 0x1E0B0C68>
__reduce__: <built-in method __reduce__ of code object at 0x008D5020>
__reduce_ex__: <built-in method __reduce_ex__ of code object at 0x008D5020>
__repr__: <method-wrapper object at 0x008CACF0>
__setattr__: <method-wrapper object at 0x008CACF0>
__str__: <method-wrapper object at 0x008CACF0>
co_argcount: 2
co_cellvars: ()
co_code: d S
co_consts: (None,)
co_filename: <stdin>
co_firstlineno: 1
co_flags: 67
co_freevars: ()
co_lnotab: ?
co_name: func2
co_names: ()
co_nlocals: 2
co_stacksize: 1
co_varnames: ('bar', 'zoo')
 >>>

Hmm, func2.func_code.co_varnames seems to have the answer.

Cheers,

// m


From danperl at rogers.com  Sun Feb  6 23:38:31 2005
From: danperl at rogers.com (Dan Perl)
Date: Sun, 6 Feb 2005 23:38:31 -0500
Subject: How to read POSTed data
References: <mailman.1980.1107622913.22381.python-list@python.org>
	<4205d419$0$6610$8fcfb975@news.wanadoo.fr>
	<lo2dnRzTVIzByZvfRVn-2Q@rogers.com>
	<42067a0d$0$10490$8fcfb975@news.wanadoo.fr>
	<HcydnfD3to45MZvfRVn-iQ@rogers.com>
Message-ID: <PO-dnTi6FK5UbZvfRVn-pA@rogers.com>


"Dan Perl" <danperl at rogers.com> wrote in message 
news:HcydnfD3to45MZvfRVn-iQ at rogers.com...
> Thanks, Pierre, this got me much further but I hit another stumbling 
> block. I can see now that CGIHTTPServer writes all the header lines into 
> os.environ and creates a subprocess for the script with os.popen2 or 
> os.popen3 (it's Windows), passing the form data to the new process through 
> sys.stdin (I believe it is sys.stdin although the Library Reference 
> descriptions of popen2 and popen3 say that would be sys.stdout).  But I 
> don't see any of those headers updated in the os.environ of the cgi 
> script's process.  Is the parent's os.environ passed to the subprocesses 
> created with popen2/popen3 on Windows?
>
> cgi.FieldStorage.read_urlencoded needs the content-length that should be 
> passed through os.environ.

I was about to report a bug but then I found bug report "[ 1100235 ] Scripts 
started with CGIHTTPServer: missing cgi environment" which is actually 
caused by "[ 1110478 ] os.environ.update doesn't work".  They are fixed with 
a patch in 1110478.  I still have to try it.  I do like the alternate 
solution proposed by the originator of 1100235 though.  I also thought that 
CGIHTTPServer should use the new subprocess.Popen class instead of popen2, 
popen3 and popen4. 




From syed_saqib_ali at yahoo.com  Fri Feb  4 10:36:30 2005
From: syed_saqib_ali at yahoo.com (syed_saqib_ali at yahoo.com)
Date: 4 Feb 2005 07:36:30 -0800
Subject: How to enable Python Scripts with MS IIS Web Server?
Message-ID: <1107531390.688583.231970@l41g2000cwc.googlegroups.com>




Hi. I have MS Windows Server 2003, Enterprise Edition.
It has MS Management Console 2.0, Version 5.2
and IIS Manager 6.0



I have a directory called "myDirs". Within this directory are 2 files:
1) index.pl (a perl script)
2) index.py (a python script whose first line is
"#!C:\Python21\pythonw.exe")

The webserver is listening on port 8080.

When I point my browser to http://localhost:8080/myDirs/index.pl, it
works... I see the output of the perl script.

HOWEVER,
When I point my browser to http://localhost:8080/myDirs/index.py, it
simply shows the python file as text. It doesn't interpret it at all.

How Can I get it to interpret the python file using the interpreter and
display the output in the browser?

Please explain each step in careful/excruciating detail because I'm a
windows Newbie.


-Saqib Ali



From marklists at mceahern.com  Sat Feb 26 10:55:38 2005
From: marklists at mceahern.com (Mark McEahern)
Date: Sat, 26 Feb 2005 09:55:38 -0600
Subject: remove strings from source
In-Reply-To: <2ab23d7a.0502260638.311cc5e9@posting.google.com>
References: <2ab23d7a.0502260638.311cc5e9@posting.google.com>
Message-ID: <42209BFA.5000802@mceahern.com>

qwweeeit wrote:

>For a python code I am writing I need to remove all strings
>definitions from source and substitute them with a place-holder.
>
>To make clearer:
>line 45  sVar="this is the string assigned to sVar"
>must be converted in:
>line 45 sVar=s00001
>
>Such substitution is recorded in a file under:
>s0001[line 45]="this is the string assigned to sVar"
>
>For curious guys:
>I am trying to implement a cross variable reference tool and the
>variability (in lenght) of the string definitions (expecially if
>multi-line) can cause display problems.
>
>I need your help in correctly identifying the strings (also embedding
>the r'xx..' or u'yy...' as part of the string definition). The problem
>is mainly on the multi-line definitions or in cached strings
>(embedding chr() definitions or escape sequences).
>  
>
Approach this in a test-driven development way.  Create sample input and 
output files.  Write a unit test something like this (below) and run 
it.  You'll either solve the problem yourself or ask more specific 
questions.  ;-)

Cheers,

// m

#!/usr/bin/env python
import unittest

def substitute(data):
    # As a first pass, just return the data itself--obviously, this 
should fail.
    return data

class Test(unittest.TestCase):
    def test(self):
        data = open("input.txt").read()
        expected = open("expected.txt").read()
        actual = substitute(data)
        self.assertEquals(expected, actual)

if __name__ == '__main__':
    unittest.main()




From cceverett at gmail.com  Sun Feb 13 22:03:42 2005
From: cceverett at gmail.com (Chad Everett)
Date: Sun, 13 Feb 2005 21:03:42 -0600
Subject: Newbie help
Message-ID: <lvUPd.10137$pE1.923@bignews3.bellsouth.net>

Hey guys,

Hope you can help me again with another problem.  I am trying to learn 
Python on my own and need some help with the following.

I am writing a program that lets has the pc pick a number and the user 
has five guess to get the number.
1. BUG:  If the number is say 35 and I guess 41 the program tells me 
that I guessed the correct number and tells me I guessed 31.

2.When I do get the correct number I can not get the program to stop 
asking me for the number.


Your help is greatly appreciated.

Chad

# Five Tries to Guess My Number
#
# The computer picks a random number between 1 and 100
# The player gets Five tries to guess it and the computer lets
# the player know if the guess is too high, too low
# or right on the money
#
# Chad Everett 2/10/2005

import random

print "\tWelcome to 'Guess My Number'!"
print "\nI'm thinking of a number between 1 and 100."
print "You Only Have Five Guesses.\n"

# set the initial values
number = random.randrange(100) + 1
guess = int(raw_input("Go Ahead and Take a guess: "))
tries = 1


# guessing loop


while guess != number:

     if (guess > number):
         print "Guess Lower..."
     else:
         print "Guess Higher..."

     guess = int(raw_input("Take Another guess: "))
     tries += 1

     print "You guessed it!  The number was", number
     print "And it only took you", tries, "tries!\n"

     if tries == 5:
         print "Sorry You Lose!!!!"
         print "The Number was ", number

raw_input("\n\nPress the enter key to exit.")

THIS IS WHAT THE RESULTS LOOKS LIKE WHEN I RUN THE PROGRAM

Welcome to 'Guess My Number'!

I'm thinking of a number between 1 and 100.
You Only Have Five Guesses.

Go Ahead and Take a guess: 99
Guess Lower...
Take Another guess: 98
You guessed it!  The number was 85
And it only took you 2 tries!

Guess Lower...
Take Another guess: 44
You guessed it!  The number was 85
And it only took you 3 tries!

Guess Higher...
Take Another guess: 55
You guessed it!  The number was 85
And it only took you 4 tries!

Guess Higher...
Take Another guess: 33
You guessed it!  The number was 85
And it only took you 5 tries!

Sorry You Lose!!!!
The Number was  85
Guess Higher...
Take Another guess:


From mefjr75 at hotmail.com  Mon Feb  7 01:16:08 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 6 Feb 2005 22:16:08 -0800
Subject: CGI POST problem was: How to read POSTed data
In-Reply-To: <m6ednTUprqnfYZvfRVn-uA@rogers.com>
References: <mailman.1980.1107622913.22381.python-list@python.org>
	<dMydnSAsTcgE2JjfRVn-oQ@rogers.com>
	<1107659974.048175.221770@z14g2000cwz.googlegroups.com>
	<m6ednTUprqnfYZvfRVn-uA@rogers.com>
Message-ID: <1107756968.920802.99540@c13g2000cwb.googlegroups.com>

Sweet!
Glad you fixed it,  and documented it all!
Thanks for the followups.
Now the next poor soul to stumble in can get the right fix.
Never know when it could be me ;)
M.E.Farmer



From jepler at unpythonic.net  Thu Feb 10 19:55:45 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Thu, 10 Feb 2005 18:55:45 -0600
Subject: Tkinter.Canvas saved as JPEG?
In-Reply-To: <420bdd36$1@nntp.zianet.com>
References: <420bdd36$1@nntp.zianet.com>
Message-ID: <20050211005545.GA2636@unpythonic.net>

The Tkinter Canvas directly supports saving to postscript format, but
not any standard bitmap format (or even modern vector formats like pdf
or svg).

Jeff
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From gazzar at nospam_email.com  Mon Feb 28 07:30:04 2005
From: gazzar at nospam_email.com (Gary Ruben)
Date: Mon, 28 Feb 2005 12:30:04 GMT
Subject: class factory example needed (long)
In-Reply-To: <mailman.3117.1109513503.22381.python-list@python.org>
References: <s_ZTd.176596$K7.77632@news-server.bigpond.net.au>
	<mailman.3117.1109513503.22381.python-list@python.org>
Message-ID: <g9EUd.178786$K7.158739@news-server.bigpond.net.au>

Thanks for the very helpful reply Rainer,
I thought I couldn't use setattr because I need the syntactic sugar 
sqrt(f) to work, but with your example code Numeric.sqrt(f) does in fact 
work correctly. I also need to do a bit more than may be possible with a 
simple lambda function, but I should be able to sort it out from here 
with the info you provided,
thanks again,
Gary

Rainer Mansfeld wrote:
<snip>
> Hi Gary,
> 
> you want your 'class factory' to change the methods of Numeric, so that 
> they accept foo objects and return foo objects?
> I've not the slightest idea how to achieve that.
> 
> If OTOH you want your foo class to have sqrt, arccos, etc. methods 
> without defining them explicitly, I think you're looking for something 
> like:
> 
> . import Numeric
> .
> . class Foo(object):
> .     def __init__(self, value):
> .         self.value = float(value)
> .         for u in ['sqrt', 'cos', 'tan']:
> .             setattr(self, u, lambda uf=getattr(Numeric, u):
> .                                  uf(self.value + 42.0))
> 
>  >>> f = Foo(7)
>  >>> f.sqrt()
> 7.0
> 
> HTH
>   Rainer
> 


From peter at engcorp.com  Sat Feb 26 21:13:24 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 26 Feb 2005 21:13:24 -0500
Subject: string methods (warning, newbie)
In-Reply-To: <38co9sF5lgss3U1@individual.net>
References: <38co9sF5lgss3U1@individual.net>
Message-ID: <G_WdnUlrv55esbzfRVn-vg@powergate.ca>

anthonyberet wrote:
> Is there a string mething to return only the alpha characters of a string?
> eg 'The Beatles - help - 03 - Ticket to ride', would be 
> 'TheBeatlesTickettoride'
> 
> If not then how best to approach this?
> I have some complicated plan to cut the string into individual 
> characters and then concatenate a new string with the ones that return 
> true with the .isalpha string method.
> 
> Is there an easier way?

Look into the string module's "translate" function.  It will
do this for you fairly easily.

-Peter


From mateusz.soltysek at gazeta.pl  Wed Feb 23 04:45:34 2005
From: mateusz.soltysek at gazeta.pl (=?ISO-8859-2?Q?Mateusz_So=B3tysek?=)
Date: Wed, 23 Feb 2005 10:45:34 +0100
Subject: Working FTP server based on Twisted framework.
Message-ID: <cvhj87$5n0$1@inews.gazeta.pl>

Hi call,

Does anybody know, if there is any opensource, working FTP server 
implementation based on Twisted framework?

Greetings


From mmiller at tx3.com  Tue Feb  1 07:05:57 2005
From: mmiller at tx3.com (Martin Miller)
Date: Tue, 01 Feb 2005 04:05:57 -0800
Subject: "pickle" vs. f.write()
In-Reply-To: <mailman.1393.1106776145.22381.python-list@python.org>
References: <opsk7f4zcua89mar@condor>
	<mailman.1393.1106776145.22381.python-list@python.org>
Message-ID: <41FF70A5.8070806@tx3.com>

On 1/26/05 at 1:48 pm, Terry Reedy wrote:
> For basic builtin objects, repr(ob) generally produces a string that when 
> eval()ed will recreate the object.  IE
> eval(repr(ob) == ob # sometimes

I've found extending this property to your own classes often fairly easy
to implement (and useful). For example:

> class person:
>     def __init__(self, name="", age=0, friends=None, comment=""):
>         if friends is None:
>             friends = []
>         self.name, self.age, self.friends, self.comment = name, age, friends, comment
> 
>     def __repr__(self):
>         return ("person(" + repr(self.name) + ", " + repr(self.age) + ", " +
>                 repr(self.friends) +  ", " + repr(self.comment) + ")")
> 
> me = person()
> 
> print "me =", repr(me)

Which produces the following output:
   me = person('', 0, [], '')


In addition, the following constructs are possible:

> family = [
>     person("Martin", 50, ["Matt"], "eldest son"),
>     person("Matt", 43, ["Martin"], "youngest son"),
>     person("Merry", 72, ["Martin", "Matt"], "mother"),
>     person("Luther", 82, ["Merry"], "father")
> ]
> 
> print "family =", repr(family)

Which output the following:
family = [person('Martin', 50, [], 'eldest son'), person('Matt', 43,
['Martin'], 'youngest son'), person('Merry', 72, ['Martin', 'Matt'],
'mother'), person('Luther', 82, ['Merry'], 'father')]

Basically this approach allows you to store your data in Python source
files -- which you can then import or execfile. The files can also
contain comments and are relatively easy to edit by hand. In addition
they're portable.

Best,
Martin




From http  Fri Feb  4 01:31:43 2005
From: http (Paul Rubin)
Date: 03 Feb 2005 22:31:43 -0800
Subject: advice needed for simple python web app
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
	<7xr7jxnddh.fsf@ruckus.brouhaha.com>
	<OqCdnWO5h9_ynp7fRVn-uA@rogers.com>
	<7xis58c1lw.fsf@ruckus.brouhaha.com>
	<TOWdndFTsJD1j57fRVn-og@rogers.com>
Message-ID: <7x6518bzu8.fsf@ruckus.brouhaha.com>

"Dan Perl" <danperl at rogers.com> writes:
> > Be careful of exposing that script to the internet.  Spammers will
> > exploit it.
> 
> Do you mean publishing the script for other people to copy it or exposing 
> the web app so that other people may access it?

I mean installing the script on a server where spammers can run it and
stick you with the blame for people getting unwanted mail.  There used
to be some similar perl scripts running all over the place until that 
happened.

> Don't worry anyway, I won't do either and I'm running 2 firewalls on
> my PC.  It would be really naive to expose the web app, wouldn't it?

Well, you should have some kind of user authentication if you expose
it, and you should read up a bit about security for web apps.  Python
is actually not such a great language for this, but you certainly get
more readable code than you would with perl.


From P at draigBrady.com  Fri Feb  4 09:34:14 2005
From: P at draigBrady.com (P at draigBrady.com)
Date: Fri, 04 Feb 2005 14:34:14 +0000
Subject: regular expression match collection
In-Reply-To: <1107525832.015932.286300@f14g2000cwb.googlegroups.com>
References: <1107525832.015932.286300@f14g2000cwb.googlegroups.com>
Message-ID: <420387E6.5000208@draigBrady.com>

ajikoe at gmail.com wrote:
> Hello,
> 
> For example I have a string : "Halo by by by"
> Then I want to take and know the possition of every "by"
> how can I do it in python?

[ match.start() for match in p.finditer("Helo by by by") ]

see:
http://mail.python.org/pipermail/python-list/2004-December/255013.html

-- 
P?draig Brady - http://www.pixelbeat.org
--


From python-url at phaseit.net  Thu Feb 24 00:08:04 2005
From: python-url at phaseit.net (Cameron Laird)
Date: Thu, 24 Feb 2005 05:08:04 GMT
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Feb 24)
Message-ID: <cvjk13$j31$1@lairds.us>

QOTW:  "Who's 'Guido'?" -- Ilias Lazaridis

"I know this document.  It has no relevance to me." -- Ilias
Lazaridis, on <URL: http://www.catb.org/~esr/faqs/smart-questions.html >

"Nobody asked them to do this (AFAIK), it's more that nobody could
_stop_ them from doing it." -- timbot, on the work of Jason Tishler
and Andrew MacIntyre with Cygwin and OS/2 EMX, respectively


    Hot off the virtual press:  Py2.4 Quick Reference:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/5be203da13eafdd2/

    For a decade now, confident people have declaimed in 
    managers' meetings and conferences that {local,Web}
    applications are {dead,utterly triumphant}, in all
    combinations (and sometimes at the same venues) (and
    sometimes by the same people!) (although not by the
    same people at the same time).  Real Programmers know
    they need judgment and expertise on both sides.  The
    principal implications for Python:  client-side Web
    scripting is one of the few domains where Python is
    *not* nearly ideal (although not for technical reasons);
    but the best "Weblications" still can result from co-
    operation between Python and other languages:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/b0085890efa29780/

    Kartic and Tony Meyer provide nice two-minute tutorials
    on imaplib, and, more generally, network programming:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/c8f87f28f00a9c93/

    Tkinter has modal dialogues:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/8fce072f149f13c0/

    Ron Stephens entertainingly advertises pyGoogle:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/e28557ad49b4619a/

    Peaceful coexistence:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/3adfa3b1148aaa8e/
	http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/3775e1b575d8fb67/


========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Brett Cannon continues the marvelous tradition established by 
    Andrew Kuchling and Michael Hudson of intelligently summarizing
    action on the python-dev mailing list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    The Python Business Forum "further[s] the interests of companies
    that base their business on ... Python."
	http://www.python-in-business.org

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topics/pythonurl/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.




From ggrp1.20.martineau at dfgh.net  Tue Feb 22 05:37:35 2005
From: ggrp1.20.martineau at dfgh.net (Martin Miller)
Date: 22 Feb 2005 02:37:35 -0800
Subject: Test for structure
References: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
	<mailman.2824.1108792560.22381.python-list@python.org>
	<1108937287.079367.276910@g14g2000cwa.googlegroups.com>
	<HIqdnYQVyeBCjYTfRVn-oQ@comcast.com>
	<1109012415.692798.185750@l41g2000cwc.googlegroups.com>
Message-ID: <1109068655.648301.178740@g14g2000cwa.googlegroups.com>

Ooops. I left out an "*" on a statement in the new aslist() function. I
should have written:

    def aslist(*args):
       return list(*args) # corrected

    def f(arg):
	args = aslist(arg)
	...

Sorry,
Martin



From barrowes at alum.mit.edu  Fri Feb 25 08:54:38 2005
From: barrowes at alum.mit.edu (Ben Barrowes)
Date: Fri, 25 Feb 2005 06:54:38 -0700
Subject: automatic nesting and indentation in emacs
In-Reply-To: <c4b57fd0.0502250230.707e5950@posting.google.com>
References: <c4b57fd0.0502250230.707e5950@posting.google.com>
Message-ID: <421f2e1f$1_2@news3.es.net>

In emacs matlab-mode, highlight a region then use indent-region:

C-M-\ runs the command indent-region
    which is an interactive compiled Lisp function in `indent'.
(indent-region START END COLUMN)

Indent each nonblank line in the region.
With prefix no argument, indent each line using `indent-according-to-mode',
or use `indent-region-function' to do the whole region if that's non-nil.
If there is a fill prefix, make each line start with the fill prefix.
With argument COLUMN, indent each line to that column.

When you call this from a program, START and END specify
the region to indent, and COLUMN specifies the indentation column.
If COLUMN is nil, then indent each line according to the mode.



porterboy wrote:
> CONTEXT:
> I am using Emacs to edit Python code and sometimes also Matlab code.
> When I hit <return> in a loop of some sort, Emacs usually gets the
> nesting indentation right, which is particularly important in Python.
> To ensure this I have used python-mode.el and matlab.el modes in
> emacs.
> 
> QUESTION:
> If I suddenly decide I want an outer loop, do I have to manually
> readjust the indentation of all the inner loops? Or can emacs do it
> automatically? I know the Matlab in-built editor has a tool called
> "smart-indent" which will automatically align highlighted text to have
> the correct indentation. Does Emacs have something similar?
> 
> Thanks
> The Porterboy - "Lovely day for a Guinness"


From tjreedy at udel.edu  Wed Feb  2 02:36:54 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 2 Feb 2005 02:36:54 -0500
Subject: Next step after pychecker
References: <Ctadnef2y-nixJ3fRVn-vQ@comcast.com>
Message-ID: <ctpvts$btt$1@sea.gmane.org>


"Steven Bethard" <steven.bethard at gmail.com> wrote in message 
news:Ctadnef2y-nixJ3fRVn-vQ at comcast.com...
 > So I assume the language spec is basically the grammar and the
> Language Reference docs[1]?

Yes.  The de facto governing syntax specification is the grammar file in 
the source code from which the parser is generated.  I once read that it is 
an ll(1) grammar; perhaps the file itself says.  The grammar snippets in 
the Ref Manual are a humanized version, not constrained to be ll(1) but 
intended to equivalent.  The text, of course, adds the semantic meat.  Any 
discrepancy between that text and implementation behavior is a bug.  Such 
usually get fixed fairly quickly after being reported.

Terry J. Reedy






From peter at somewhere.com  Tue Feb 15 09:49:34 2005
From: peter at somewhere.com (Peter Maas)
Date: Tue, 15 Feb 2005 15:49:34 +0100
Subject: replacing ASP/VBScript with Python
Message-ID: <cusnon$qhd$1@swifty.westend.com>

I have inherited an extremely messy ASP/VBScript application which
is a pain for me to support. Now the customer is thinking about a
redesign. I'd like to rewrite the whole thing in Python but the app
has to meet some conditions like

- IIS frontend
- MSSQL db server
- Win32 authentication
- No 'ugly' URLs like http://server/cgi-bin/frontend.cgi?main.py
- Performance: intranet with ~ 1000 users

My personal preferences:

- I'd rather do this in plain Python than using e.g. Zope because I
   fear the additional complexity of handling Zope and make it seam-
   lessly work with IIS.
- I'd like to do session handling in Python because ASP's session
   object is quite limited and some of the ASP app's mess is caused
   by trying to use it for compound data type storage. OTOH I could
   pickle Python objects to a string and store that in an ASP session.

Thanks for any help.

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From cam.ac.uk at mh391.invalid  Sun Feb 13 08:52:34 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sun, 13 Feb 2005 13:52:34 +0000
Subject: [NooB] a Variable in multiple quotes...
In-Reply-To: <614c778e.0502130204.5824cddf@posting.google.com>
References: <614c778e.0502130204.5824cddf@posting.google.com>
Message-ID: <cunm34$s1i$1@gemini.csx.cam.ac.uk>

You know, it's really not necessary for you to put "[NooB]" in the subject
of your posts. This is a fairly friendly group and they will answer even
newbie questions amicably. But if you want an even kinder, gentler place to
ask questions as a newbie (not a noob), I suggest the Tutor mailing list:

http://mail.python.org/mailman/listinfo/tutor
-- 
Michael Hoffman


From __peter__ at web.de  Thu Feb  3 07:18:30 2005
From: __peter__ at web.de (Peter Otten)
Date: Thu, 03 Feb 2005 13:18:30 +0100
Subject: Generating modul classes with eval
References: <mailman.1772.1107377411.22381.python-list@python.org>
	<pan.2005.02.02.21.20.40.542069@jerf.org>
	<mailman.1801.1107422854.22381.python-list@python.org>
Message-ID: <ctt4mu$8vs$05$1@news.t-online.com>

Axel Straschil wrote:

> class_dic = {}
> class_dic['Br'] = _Tag
> class_dic['Hr'] = _Tag
> class_dic['Html'] = _ContainerTag
> class_dic['Table'] = _ContainerTag
> 
> for class_name, class_base in class_dic.items():
>     class TmpClass(class_base):
>         def __init__(self, **props):
>             name = class_name.lower()
>             #super(TmpClass, self).__init__(name=name, **props)
>             class_base.__init__(self, name=name, **props)
>     setattr(_module_name, class_name, TmpClass)

While your workaround doesn't balk immediately, it doesn't do the right
thing either.

After the loop has finished, the global variable TmpClass will be bound to
whatever class was created last, and the variable class_base will be bound
to that the base class of that same TmpClass. Therefore only this last class
is guaranteed to work as expected.

A simplified example to demonstrate the binding problem:

>>> classes = []
>>> for text in ["alpha", "beta"]:
...     class T:
...             def __init__(self): print text
...     classes.append(T)
...
>>> classes[0] is classes[1]
False # two distinct classes, as expected
>>> classes[0]()
beta
<__main__.T instance at 0x402a9e2c>
>>> classes[1]()
beta
<__main__.T instance at 0x402a9f8c>

And now the proof that you are actually accessing the global variable: 

>>> text = "gamma"
>>> classes[0]()
gamma
<__main__.T instance at 0x402a9f8c>

One way to fix this is to introduce a factory function:

>>> def make_class(text):
...     class T:
...             def __init__(self): print text
...     return T
...
>>> classes = []
>>> for text in ["alpha", "beta"]:
...     classes.append(make_class(text))
...
>>> classes[0]()
alpha
<__main__.T instance at 0x402a9e4c>
>>> classes[1]()
beta
<__main__.T instance at 0x402a9f8c>
>>>


Peter



From brent.hughes at comcast.net  Wed Feb  9 15:44:44 2005
From: brent.hughes at comcast.net (Brent W. Hughes)
Date: Wed, 9 Feb 2005 13:44:44 -0700
Subject: Newbie:  SWIG or SIP?
Message-ID: <cKKdnfEhSpyv65ffRVn-qg@comcast.com>

I have a third-party DLL and it's associated .h file.  The DLL was written 
in C.  I have neither the associated .c files nor the .obj files for the 
DLL.  Can I use SWIG or SIP to build something that will allow me to use the 
DLL with Python?  And what is that something, an .obj file, another DLL or 
what?

Brent




From jfj at freemail.gr  Mon Feb  7 21:10:37 2005
From: jfj at freemail.gr (jfj)
Date: Mon, 07 Feb 2005 18:10:37 -0800
Subject: Confused with methods
In-Reply-To: <1grmg8s.17t7tj4180jdj6N%aleaxit@yahoo.com>
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>
	<slrnd0enor.26q.apardon@rcpc42.vub.ac.be>
	<1grmd4z.1tlm4e61650vedN%aleaxit@yahoo.com>
	<slrnd0f07t.26q.apardon@rcpc42.vub.ac.be>
	<1grmg8s.17t7tj4180jdj6N%aleaxit@yahoo.com>
Message-ID: <42081F9D.70803@freemail.gr>

Alex Martelli wrote:

 >

I think the problem is that you know python so well that you are used
to the way things are and everything seems natural the way it is.
For a newbie, the behaviour I mentioned seems indeed a bit inconsistent.
"Inconsistent" not as in mathematics but as in "wow! I'd thought this
should work like this". Like you have a perception of the language
and then this feature changes everything. It's a different kind of
"inconsistency" and it doesn't give python a bad name or something,
nor does it break the mathematical laws of the universe.

There is no trolling involved here. Maybe wrong use of the english
language. But then again, this is the newgroups and the english
language is ill-used all the time:)


Regards,

jfj



From ncoghlan at iinet.net.au  Sun Feb 13 21:53:24 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Mon, 14 Feb 2005 12:53:24 +1000
Subject: Kill GIL
In-Reply-To: <86sm405d38.fsf@guru.mired.org>
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>	<cum62t$3fb$1@panix2.panix.com>	<mailman.2463.1108256227.22381.python-list@python.org>	<868y5t6sal.fsf@guru.mired.org>
	<cumoue$9ur$1@panix2.panix.com> <86sm405d38.fsf@guru.mired.org>
Message-ID: <421012A4.40006@iinet.net.au>

Mike Meyer wrote:
> aahz at pythoncraft.com (Aahz) writes:
>>Threads are also good for handling blocking I/O.
> 
> Actually, this is one of the cases I was talking about. I find it
> saner to convert to non-blocking I/O and use select() for
> synchronization. That solves the problem, without introducing any of
> the headaches related to shared access and locking that come with
> threads.

Use a communicating sequential processes model for the threading and you don't 
have many data synchronisation problems because you have barely any shared 
access - no application data is ever shared between threads, they only send 
messages to each other via message queues. Most threads simply block on their 
incoming message queue permanently. Those doing blocking I/O set an appropriate 
timeout on the I/O call so they can check for messages occasionally.

Conveniently, you end up with an architecture that supports switching to 
multiple processes, or even multiple machines just by changing the transport 
mechanism used by the message system.

(We did exactly this for a GUI application - detached the GUI so it talked to a 
server via CORBA instead of via direct DLL calls. This meant the server could be 
ported to a different platform without having to port the far more platform 
specific GUI. This would have been much harder if we weren't already using a CSP 
model for communication between different parts of the system)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From jmdeschamps at cvm.qc.ca  Wed Feb  9 10:31:48 2005
From: jmdeschamps at cvm.qc.ca (jmdeschamps)
Date: 9 Feb 2005 07:31:48 -0800
Subject: cx_Oracle failed to load DLL  BUT versions correct
Message-ID: <3d06fae9.0502090731.7232b53d@posting.google.com>

Hello

Having cx_Oracle (an Oracle database connector for Python) used it
here where I teach for the last couple of years, and finding it so
easy to use (and install) I was taken aback when I got an error
message telling me it could not load the DLL (complete message below)

Third, I've read (on activeState site) about someone else having this
problem which seemed to be resolved by correctly installing the
appropriate versions  of different software piece.

BUT no 1 : I works on my portable (that has the same configuration for
OS, Python and cx)

BUT no 2:  The same configuration gets the error message from our
classroom workstations -
after multiple testing, (uninstalling everything, python, Oracle,
cx_Oracle,etc) ,  cleaning the registry, re-installing from fresh
binaries ( Oracle works (SQL+) ) , the error stays...

HELP - Any hints, helps, things to look for, whatnot,

Many thanks in advance,

Jean-Marc
jmdeschamps at cvm.qc.ca
Cegep du Vieux-Montreal


CONFIGURATION
windows XP professionnal, sp2 (firewall stopped)
installation in administrator mode
Oracle 10g
Python 2.3.4
pywin32-203.win32-py2.3.exe
cx_Oracle-4.1-win32-10g-py23.exe

NOTE: all files seem in the right places (cx_Oracle.pyd in
site-packages)

ERROR (taken from PythonWin interactive window)
PythonWin 2.3.4 (#53, May 25 2004, 21:17:02) [MSC v.1200 32 bit
(Intel)] on win32.
Portions Copyright 1994-2004 Mark Hammond (mhammond at skippinet.com.au)
-
see 'Help/About PythonWin' for further copyright information.
>>> import cx_Oracle
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
ImportError: DLL load failed: La proc?dure sp?cifi?e est introuvable.
>>>


From oliphant at ee.byu.edu  Thu Feb 24 18:52:29 2005
From: oliphant at ee.byu.edu (Travis Oliphant)
Date: Thu, 24 Feb 2005 16:52:29 -0700
Subject: Nevow examples
Message-ID: <421E68BD.6070009@ee.byu.edu>


There was a request for nevow examples.  Nevow is a fantastic 
web-development framework for Python.

I used nevow to create http://www.scipy.org/livedocs/

This site uses nevow and self introspection to produce (live) 
documentation for scipy based on the internal docstrings.   It would be 
nice to add the capability for users to update the documentation through 
the web-site.  But, that functionality is not complete.

The code itself is available in the util directory of scipy which can be 
checked out of CVS (or browsed).  Go to http://www.scipy.org  for mor 
details.

-Travis Oliphant



From peter at engcorp.com  Sun Feb 13 08:55:45 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sun, 13 Feb 2005 08:55:45 -0500
Subject: For American numbers
In-Reply-To: <%DBPd.10409$Lf6.440348@phobos.telenet-ops.be>
References: <420e7376$1@nntp0.pdx.net> <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
	<%DBPd.10409$Lf6.440348@phobos.telenet-ops.be>
Message-ID: <sYSdnX7Zq4NGwZLfRVn-uA@powergate.ca>

Roel Schroeven wrote:
> Peter Hansen wrote:
> 
>> Scott David Daniels wrote:
>>
>>> Kind of fun exercise (no good for British English).
>>>
>>>     def units(value, units='bytes'):
>>>         magnitude = abs(value)
>>>         if magnitude >= 1000:
>>>             for prefix in ['kilo mega giga tera peta '
>>>                            'exa zetta yotta').split():
>>>                 magnitude /= 1000.
>>>                 if magnitude < 1000.:
>>>                     break
>>
>>
>>
>> Only for hard drive manufacturers, perhaps.
> 
> 
> And physicists and chemists and engineers and all other kinds of 
> scientists all over the world. Plus those of us in the computer world 
> who agree that 'kilo == 1024' is an abomination that should never have 
> existed and which we should get rid of as fast as possible.

Physicists and chemists (and most engineers) don't go around
talking about "kilobytes" all that often, and when they do
it's generally unimportant whether they mean 1000 or 1024.

Given the clear "units='bytes'" default above, and my restricting
my comments to "the rest of the computer world", it should be
clear I was talking about a very limited subset of the planet.

A subset, however, which has an extremely strong attachment to
1024 instead of 1000 (for very good reasons), and which is
less likely to abandon backwards compatibility and widely accept
1000 than the US is likely to adopt metric widely in the near
future...

-Peter


From martin at v.loewis.de  Tue Feb  8 15:54:43 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 08 Feb 2005 21:54:43 +0100
Subject: Printing Filenames with non-Ascii-Characters
In-Reply-To: <36a3ikF4uk8r0U1@individual.net>
References: <36a3ikF4uk8r0U1@individual.net>
Message-ID: <420926fd$0$13973$9b622d9e@news.freenet.de>

Marian Aldenh?vel wrote:
>   dir = os.listdir(somepath)
>   for d in dir:
>      print d
>             
> The program fails for filenames that contain non-ascii characters.
> 
>   'ascii' codec can't encode characters in position 33-34:

I cannot reproduce this. On my system, all such file names print just
fine, in Python 2.3.4.

Are you using the Windows XP cmd.exe window to perform this experiment?
What (language) version of XP are you using?
What are your regional settings?
What is sys.stdout.encoding?
What is the result of locale.setlocale(locale.LC_ALL, "")?

> What I specifically do not understand is why Python wants to interpret the
> string as ASCII at all. Where is this setting hidden?

If this is in cmd.exe (or equivalent), Python
1. verifies that the output is indeed a terminal
2. if it is, determines what code page the terminal uses
3. tries to find a codec for this code page
4. if this fails, falls back to ASCII

In your case, step 4 must have happend. It's not clear to my why this
happened, unless you are using a Japanese version of XP (or some other
version for which Python does not have a codec).

> I am running Python 2.3.4 on Windows XP and I want to run the program on
> Debian sarge later.

In Linux, make sure that LANG is set to a value that allows Python to
infer the encoding of the terminal.

Regards,
Martin


From gilles.leblanc at gmail.com  Sat Feb 26 17:21:21 2005
From: gilles.leblanc at gmail.com (Gilles Leblanc)
Date: 26 Feb 2005 14:21:21 -0800
Subject: Using PyOpenGL what should I use for a GUI ?
Message-ID: <1109456481.214243.140670@l41g2000cwc.googlegroups.com>

Hi I have started a small project with PyOpenGL. I am wondering what
are the options for a GUI. So far I checked PyUI but it has some
problems with 3d rendering outside the Windows platform.

I know of WxPython but I don't know if I can create a WxPython window,
use gl rendering code in it and then put widgets on top of that...



From zetasum at yahoo.com  Sun Feb 27 20:26:25 2005
From: zetasum at yahoo.com (zetasum)
Date: 27 Feb 2005 17:26:25 -0800
Subject: but someone got out and me and my familiy try to stop them and got
	trocherd in unknow dimentions i try to make it better and
	they change me to make it worse so what do i do if you see
	what in my chest in every dimention!!! look for
	consiousnesses in the house i spelled it wrong bbecuase thats
	what you will say when you see my bodie 366-94-1447 2-3-1973
	follow my bodie and the liverance familiy everywhere and look
	find out why we are being killed?????
Message-ID: <1109553985.792892.5590@o13g2000cwo.googlegroups.com>

but someone got out and me and my familiy try to stop them and got
trocherd in unknow dimentions i try to make it better and they change
me to make it worse so what do i do if you see what in my chest in
every dimention!!! look for consiousnesses in the house i spelled it
wrong bbecuase thats what you will say when you see my bodie
366-94-1447 2-3-1973 follow my bodie and the liverance familiy
everywhere and look find out why we are being killed?????

TRUE PROVEN METHOD OF HIGHER INTELLGENCE

alpha, theta and delta, brain waves of the mind wich we now know that
are qunatium state of mind space time and realm. That froms the a
beings instincts of unkown not found is the combination pleasent of
sense's of smell,sight and sound in a peacesful manner..It is the
consious ambient of peaceful manner that lead to intellgence. The
relax state of mind and the brain wave patter that will be found will
open a crative door to the minds eye not of what we think will be
intellgence but during day dreaming states of mind. The person would
be able to see the full design of ones idea with an open mind instead
of starting with one concept and working with it you would be able to
start with 10 concept and combine then as one. Itellgence is an I.Q
that one can chart Because there are two types of people in the world
people that dream and people that do and if dreams could learn to
dream and then do. The definition of intellgence would change
infromation flows free in this zeta multi-x pattern this would not
just spawn another pattern of brain waves but would be one step into a
door where infinte ideas of very high itellgence ones flow and cannot
find the source, and tring to hard along with Hate puts more
information in the brain that stops the flow of information the other
sources that stops this infromation is P.S.I ability to do telepathy
this is open you mind to unknown infromation. This path of this idea
will give you the other infinte
thoughts that you will never spawn from now until the end of time
becuase no one has done this before and willl never do it but they
have and try to intergrate hate and have fail where you my qunatum
freind will succeed all other before us. This is the key to my
qunatium encrypted web site. P.S.I That stop all before us cannot find
technology but can find and change the minds of people that try to
change humans history so print this out put in all four pockets the
more you print the more it changes the more times you e-mail this the
statistical chance you have at reaching the unknow universe. In
computer terms in the future it is now not 99.9% true or false it is
TRUE PROVEN METHOD OF HIGHER INTELLGENCE OF THIS CHANGES HUMAN HISTORY
NOT 1% BUT ALL 100%. WITH BIOINFORMATICS YOU HAVE TO HAVE A LAB OF NO
FREQUENCIES OR THE UNKNOWS P.S.I WILL CHANGE YOUR LAB WORK. WHITE
NOISE OF ALL QUNATIUM DIMENTIONS IN ALL QUANTIUM STATES AND THAT 1%
WILL STILL GET THREW - GHOAST IN THE MACHINE!!! TRUST ME THE
PROGRAMMED WORKED ON MY COMPUTER AT HOME BUT FAILIED AT NASA BECUASE
THEY ONLY CAHNGE HISTORY IF YOU MIND IS 97% THAT IT WILL NOT KNOWING
OF THEM BEING THERE!!!!


combine this with this group that
http://groups.yahoo.com/group/Quantum_AI

This guy qaudra_light at yahoo.com posted using my e-mail address got me
torcherd
by his people or something skitzo say there qunatium invisble people in
other dimentions killing the machine or something@!@



From paschott at no.yahoo.spamm.com  Tue Feb  1 17:53:19 2005
From: paschott at no.yahoo.spamm.com (Peter A. Schott)
Date: Tue, 01 Feb 2005 22:53:19 GMT
Subject: ftplib help - delete from server after download results in 0-byte
	file
Message-ID: <df1001to77rel831m17sssnbt5vrmqai41@4ax.com>

Got a strange scenario going on here in that I could have sworn this worked
yesterday.  I am issuing binary retrieval calls to an FTP server, writing to a
file, close the file, then removing the file from the remote site.  When I do
this, I end up with 0 byte files.  I was hoping to avoid parsing a list of
remote and local files and matching them up that way because it would be easier
to remove on successful retrieve.  I'm including some sample code and really
hoping someone can point out where I'm messing up.

Thanks.


import os, ftplib
DPI = "C:/DestinationFolder/"
	#Actually named different in code, but shorter for reading here.
	#Note - objFTP is already opened - this is not the issue.

objFTP.cwd("/ksdata_in")

	#I'm open to better ways to do this.  Can't use nlst if empty.
TestDir = objFTP.dir()
if TestDir <> None:
	FTPRemoteList = objFTP.nlst()

#If the remote file is type SEM or PGP, do this.
for filename in [filename for filename in FTPRemoteList if \
(os.path.splitext(filename)[1] in [".sem",".SEM",".PGP",".pgp"])]:
	try:
		DestinationFile = open(os.path.join(DPI, filename), "wb")
		print DestinationFile
		objFTP.retrbinary("RETR " + filename, DestinationFile.write)
		SQLLogging.LogFTP(filename, CompanyInput, 1, 'ToDrive')
		DestinationFile.close()

#This is the culprit.  When this is active, it writes a 0 byte file locally
# and deletes the file on the server.
		#objFTP.delete(filename)
	except:
		SQLLogging.LogFTP(filename, CompanyInput, 0, 'ToUs')
		print Exception
	

#This is my workaround in the meantime.  If I've downloaded the files, get
#another remote listing and delete and files from remote that are downloaded
#locally and larger than 1Kbish for PGP files.  SEM files are 0 bytes.

TestDir = objFTP.dir()
if TestDir <> None:
	FTPRemoteList = objFTP.nlist()
	for filename in FTPRemoteList:
		if os.path.isfile(os.path.join(DownloadedPathInput, filename)) and \
os.path.splitext(filename)[1] in [".pgp",".PGP"] and \
os.stat(os.path.join(DownloadedPathInput, filename))[6] > 1000:
			objFTP.delete(filename)
		if os.path.isfile(os.path.join(DownloadedPathInput, filename)) and \
os.path.splitext(filename)[1] in [".SEM",".sem"]:
			objFTP.delete(filename)





From philippecmartin at sbcglobal.net  Sat Feb  5 16:51:04 2005
From: philippecmartin at sbcglobal.net (Philippe C. Martin)
Date: Sat, 05 Feb 2005 15:51:04 -0600
Subject: pickle/marshal internal format 'life expectancy'/backward
	compatibility
Message-ID: <1107640264.7097.5.camel@localhost>

Hi,


I am looking into using the pickle format to store object/complex data
structures into a smart card as it would make the design of the embedded
application very simple.

Yet the card might have to stay in the pocket of the customer for a few
years, during which the back office application responsible for
retrieving the information from the card might evolve as well as the
python release it relies upon.

Is there a commitment for python releases to be able to interpret
'older' pickle/marshal internal formats ?

Regards,


Philippe





-- 
***************************
Philippe C. Martin
SnakeCard LLC
www.snakecard.com
***************************



From amk at amk.ca  Wed Feb  2 12:35:57 2005
From: amk at amk.ca (A.M. Kuchling)
Date: Wed, 02 Feb 2005 11:35:57 -0600
Subject: how to write a tutorial
References: <1106305730.361540.21010@f14g2000cwb.googlegroups.com>
	<1106472508.591411.40140@c13g2000cwb.googlegroups.com>
	<1106723545.429728.308620@f14g2000cwb.googlegroups.com>
	<1107354540.608556.305540@z14g2000cwz.googlegroups.com>
	<1107362671.182505.22180@c13g2000cwb.googlegroups.com>
	<IrednbfqvqXOkZzfRVn-1A@rogers.com>
Message-ID: <8cWdnYRauejgkpzfRVn-oA@speakeasy.net>

On Wed, 2 Feb 2005 12:22:24 -0500, 
	Dan Perl <danperl at rogers.com> quoted:
> "Xah Lee" <xah at xahlee.org> wrote in message 
>> I suggest it be dropped in both places. The mentioning of this book in
>> the Perl/Python community is mostly a fawning behavior and confession
>> that the author is among "in the know". This book and its mentioning is
>> a cultish behavior among OpenSource morons.

Not to mention that the reference to the book in the regex howto is hardly 
"fawning":

	  The most complete book on regular expressions is almost certainly
	  Jeffrey Friedl's Mastering Regular Expressions, published by
	  O'Reilly. Unfortunately, it exclusively concentrates on Perl and
	  Java's flavours of regular expressions, and doesn't contain any
	  Python material at all, so it won't be useful as a reference for
	  programming in Python. (The first edition covered Python's
	  now-obsolete regex module, which won't help you much.) Consider
	  checking it out from your library.

(I like how Lee extols Python, but also says its documentation was written 
by "opensource morons".  Honestly, you couldn't pay for this much
entertainment.)

--amk




From peter at engcorp.com  Sat Feb 12 22:24:40 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 12 Feb 2005 22:24:40 -0500
Subject: Alternative to raw_input ?
In-Reply-To: <my27ag7r6ca1$.wfp66yydaeqw$.dlg@40tude.net>
References: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>
	<mailman.2400.1108139722.22381.python-list@python.org>
	<w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>
	<cuio9f$13k8$1@ns.felk.cvut.cz>
	<ckkuclxhhrv7$.1lqqmenvnqvg5$.dlg@40tude.net>
	<MKSdnYiccMgv8ZDfRVn-hg@powergate.ca>
	<my27ag7r6ca1$.wfp66yydaeqw$.dlg@40tude.net>
Message-ID: <gOOdnTtZnaZvVZPfRVn-3w@powergate.ca>

BOOGIEMAN wrote:
> On Fri, 11 Feb 2005 21:38:47 -0500, Peter Hansen wrote:
> 
>>print prompt
>>while msvcrt.kbhit():
>>     msvcrt.getch()
>>msvcrt.getch()
> 
> 
> Thanks, it works but without line "print prompt" and also

That was intended to be a hint that you might need
to print a prompt to the user (maybe a string contained
in a variable named "prompt", for example ;-), or the
program might halt without apparent reason.

> I'm not sure if I should put this function :
> 
> def cekaj():
>     while msvcrt.kbhit():
>         msvcrt.getch()
>     msvcrt.getch()
> 
> #Or this one, which sounds more logical according to help
> #kbhit() - Return true if a keypress is waiting to be read. 
> 
> def cekaj():
>     msvcrt.getch()
>     while msvcrt.kbhit():
>         msvcrt.getch()
>      
> It works both ways, not sure which one is right

The point of doing the first approach is that you are
reading *all* available keystrokes (in the loop), and
then sitting and waiting for one more keystroke before
continuing.  If you don't read all keystrokes first,
then if the user has hit a key, say, five minutes
earlier, it will still be sitting in the queue and
your program will not actually stop at all.

Your second approach sits and waits (if necessary)
to read a single keystroke, and then if the user had
managed to hit two or more keys** before that, it will
consume all remaining keystrokes before continuing.
Not exactly the same thing, nor generally quite
what you want.  Based on what you originally asked for,
the former is the correct approach.

** Note that some keys will result in a pair of
values being retrieved by getch(), with the first one
being (generally... maybe always... I can't remember
but it's easy for you to experiment) a 0, and the second
being another code that identifies the key.  The F5
key, for example, returns a 0 and then a 64 on the
second call to getch().  If you *really* want *any*
key to continue, you'll want to check for this sort
of thing as well... though personally I'd just use
raw_input() and keep my program portable. <wink>

-Peter


From ncoghlan at iinet.net.au  Fri Feb 11 08:42:17 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 11 Feb 2005 23:42:17 +1000
Subject: Statement coverage tools revisited
In-Reply-To: <87zmyb71r2.fsf@titan.staselog.com>
References: <87zmyb71r2.fsf@titan.staselog.com>
Message-ID: <420CB639.9060704@iinet.net.au>

Edvard Majakari wrote:
> ,----
> | The coverage dictionary is called "c" and the trace function
> | "t".  The reason for these short names is that Python looks up variables
> | by name at runtime and so execution time depends on the length of
> | variables!  In the bottleneck of this application it's appropriate to
> | abbreviate names to increase speed.
> `----
> 
> It was written when 2.1 was the most recent stable version. I wonder if it
> still applies for 2.2 and later? According to my hasty tests it doesn't
> seem to be so. I didn't have very large unit test files at hand, though.

It's no longer correct (if it ever was correct). Python internalises 'short' 
strings (including identifiers) so that comparison can generally be done by 
means of identity checks.

Py> long_and_really_complicated_var_name = 1
Py> "long_and_really_complicated_var_name" is "long_and_really_complicated_var_n
ame"
True
Py> "long_and_really_complicated_non_var_name" is "long_and_really_complicated_n
on_var_name"
True
Py> "long_and_really_complicated_non_var_name" * 20 is "long_and_really_complica
ted_non_var_name" * 20
False

Ah, the wonderful efficiencies of immutable types. . .

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From snail at objmedia.demon.co.uk  Mon Feb 14 09:53:37 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Mon, 14 Feb 2005 14:53:37 +0000
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr>
Message-ID: <qno1UWSxtLECFwEp@objmedia.demon.co.uk>

In message <cuq57b$j83$1 at usenet.otenet.gr>, Ilias Lazaridis 
<ilias at lazaridis.com> writes
>the community do not care about essential needs and requirements.

Wrong. They do. They just don't care about *your* essential needs and 
requirements which *you* want *others* to fulfill at *their* cost. As 
others have said, "do some work yourself".

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From rickysarraf at gmail.com  Thu Feb  3 09:20:30 2005
From: rickysarraf at gmail.com (rickysarraf at gmail.com)
Date: 3 Feb 2005 06:20:30 -0800
Subject: test msg
Message-ID: <1107440430.276966.318580@z14g2000cwz.googlegroups.com>

tes tmsg



From peter at engcorp.com  Wed Feb 16 20:31:12 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 16 Feb 2005 20:31:12 -0500
Subject: Stable GUI + wxPython memory leak
In-Reply-To: <1108596113.424102.255340@f14g2000cwb.googlegroups.com>
References: <c0e7fd79.0502160619.565eb40e@posting.google.com>
	<1108564589.069982.71680@o13g2000cwo.googlegroups.com>
	<1108569376.721830.67370@o13g2000cwo.googlegroups.com>
	<1108596113.424102.255340@f14g2000cwb.googlegroups.com>
Message-ID: <RbCdnauwxveOaY7fRVn-qg@powergate.ca>

Viktor wrote:
> I just noticed that wxPython is leaking memory?! Playing with
> wxPython-demo, I started with 19MB used, and ended whith almost 150MB
> used?!
> It's wxPython 2.5.3.1 running on Python 2.4.

On which platform?

And how are you measuring this apparent memory consumption?

And what happens (assuming you're on Windows) if you minimize
the window?  What does the memory usage show as then?  And if
you then restore the window but do nothing else with it?

Memory consumption is a very difficult thing to measure
properly in the best of circumstances, and if you're merely
running the demo it seems unlikely you're observing a real "leak".

-Peter


From fredrik at pythonware.com  Sat Feb 19 12:44:27 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 19 Feb 2005 18:44:27 +0100
Subject: unicode encoding usablilty problem
References: <opsmekm2ei6yt6e7@news.cisco.com><mailman.2811.1108751132.22381.python-list@python.org>
	<opsmepfmcx6yt6e7@news.cisco.com>
Message-ID: <cv7tm9$61m$1@sea.gmane.org>

"aurora" <aurora00 at gmail.com> wrote:

> I don't want to mix them. But how could I find them? How do I know this  statement can be 
> potential problem
>
>   if a==b:
>
> where a and b can be instantiated individually far away from this line of  code that put them 
> together?

if you don't know what a and b comes from, how can you be sure that
your program works at all?  how can you be sure they're both strings?

("a op b" can fail in many ways, depending on what "a", "b", and "op" are)

> Things works fine, unit tests pass, all until the first non-ASCII characters
> come in and then the program breaks.

if you have unit tests, why don't they include Unicode tests?

</F> 





From aurora00 at gmail.com  Wed Feb 23 13:25:32 2005
From: aurora00 at gmail.com (aurora)
Date: Wed, 23 Feb 2005 10:25:32 -0800
Subject: running a shell command from a python program
References: <1109170831.815278.243270@f14g2000cwb.googlegroups.com>
Message-ID: <opsmnxguec6yt6e7@news.cisco.com>

In Python 2.4, use the new subprocess module for this. It subsume the  
popen* methods.

> Hi,
>    I'm a newbie, so please be gentle :-)
>
> How would I run a shell command in Python?
>
> Here is what I want to do:
> I want to run a shell command that outputs some stuff, save it into a
> list and do stuff with the contents of that list.
>
> I started with a BASH script actually, until I realized I really needed
> better data structures :-)
>
> Is popen the answer? Also, where online would I get access to good
> sample code that I could peruse?
>
> I'm running 2.2.3 on Linux, and going strictly by online doc so far.
>
> Thanks!
> S C
>



From brian at sweetapp.com  Fri Feb 11 10:09:36 2005
From: brian at sweetapp.com (Brian Quinlan)
Date: Fri, 11 Feb 2005 16:09:36 +0100
Subject: Is this a bug? BOM decoded with UTF8
In-Reply-To: <373sj3F590j6iU1@individual.net>
References: <epMOd.357$7m.215@read3.inet.fi>	<420bc317$0$4925$9b622d9e@news.freenet.de>	<KT1Pd.641$gz1.258@read3.inet.fi>	<373p8vF57039vU1@individual.net>	<mailman.2392.1108129900.22381.python-list@python.org>
	<373sj3F590j6iU1@individual.net>
Message-ID: <420CCAB0.30902@sweetapp.com>

Diez B. Roggisch wrote:
> I'm well aware of the need of a bom for fixed-size multibyte-characters like
> utf16.
> 
> But I don't see the need for that on an utf-8 byte sequence, and I first
> encountered that in MS tool output - can't remember when and what exactly
> that was. And I have to confess that I attributed that as a stupidity from
> MS. But according to the FAQ you mentioned, it is apparently legal in utf-8
> too. Neverless the FAQ states:
> 
[snipped]
> So they admit that it makes no sense - especially as decoding a utf-8 string
> given any 8-bit encoding like latin1 will succeed.

They say that it makes no sense as an byte-order indicator but they 
indicate that it can be used as a file signature.

And I'm not sure what you mean about decoding a UTF-8 string given any 
8-bit encoding. Of course the encoder must be know:

 >>> u'T\N{LATIN SMALL LETTER U WITH DIAERESIS}r'
...   .encode('utf-8').decode('latin1').encode('latin1')
'T\xc3\xbcr'

I can assume you that most Germans can differentiate between "T?r" and 
"T??r".

Using a BOM with UTF-8 makes it easy to indentify it as such AND it 
shouldn't break any probably written Unicode-aware tools.

Cheers,
Brian


From gh at ghaering.de  Tue Feb  8 08:18:27 2005
From: gh at ghaering.de (Gerhard Haering)
Date: Tue, 8 Feb 2005 14:18:27 +0100
Subject: User Identification
In-Reply-To: <slrnd0hc3d.1pq.rparnes@debian.localdomain>
References: <slrnd0hc3d.1pq.rparnes@debian.localdomain>
Message-ID: <20050208131827.GA6844@mylene.ghaering.de>

On Tue, Feb 08, 2005 at 12:29:48PM -0000, Bob Parnes wrote:
> I have a python program on a server of an all-linux network. It needs to 
> record the user name running it. Is there a way for the program to extract
> the name from the system without a separate log-in dialog?

os.environ["USER"] for a start?

os.getuid() will give you the user id, but I don't know if Python has
methods to look up more information from that from /etc/passwd or
whereever from.

-- Gerhard
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From eurleif at ecritters.biz  Sun Feb  6 02:11:12 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sun, 06 Feb 2005 02:11:12 -0500
Subject: Word for a non-iterator iterable?
Message-ID: <36lu1cF516qtdU1@individual.net>

Is there a word for an iterable object which isn't also an iterator, and 
therefor can be iterated over multiple times without being exhausted? 
"Sequence" is close, but a non-iterator iterable could technically 
provide an __iter__ method without implementing the sequence protocol, 
so it's not quite right.


From jack at performancedrivers.com  Mon Feb 14 19:15:13 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Mon, 14 Feb 2005 19:15:13 -0500
Subject: Inheritance error in python 2.3.4???
In-Reply-To: <338366A6D2E2CA4C9DAEAE652E12A1DE02520362@au3010avexu1.global.avaya.com>
References: <338366A6D2E2CA4C9DAEAE652E12A1DE02520362@au3010avexu1.global.avaya.com>
Message-ID: <20050215001513.GB27274@performancedrivers.com>

On Tue, Feb 15, 2005 at 10:56:23AM +1100, Delaney, Timothy C (Timothy) wrote:
> friedmud at gmail.com wrote:
> 
> > I guess I could just use one underscore.... but that means it is
> > easier for other people to get at my implementation details (which,
> > coming from a C++ background really bothers me).
> 
> This is the correct solution, and getting over being bothered about it
> is the correct thing to do.
> 
> Getting at private members is simple in C++ too if anyone wants to do
> that.

As a long time C++ guy that switched over to python (via a perl detour) my 
advice is to do things the python way even if they feel strange at first.  
In this case forget about "private" and "protected."  If it helps you can 
consider them conventions that have some compiler support.  The 20th 
commandment of python is "we're all adults here."  To see the first 19, type 
"import this" at the python prompt.

I also discovered - to my shock and horror - that many of the GoF's "Design
Patterns" were actually C++ centric and not universals.  The sting of seeing
canon reduced to a HOWTO fades quickly, just jump in with both feet.

-Jack


From sjmachin at lexicon.net  Sun Feb 13 07:04:08 2005
From: sjmachin at lexicon.net (John Machin)
Date: 13 Feb 2005 04:04:08 -0800
Subject: a Variable in multiple quotes...
In-Reply-To: <614c778e.0502130204.5824cddf@posting.google.com>
References: <614c778e.0502130204.5824cddf@posting.google.com>
Message-ID: <1108296248.611612.186470@z14g2000cwz.googlegroups.com>

administrata wrote:
> Is it possible?
>
> I tried...
>
>
> I = "John"
> print \
> """
> I used to love pizza"""
>
>
> Error occurs!!!
>
> But, I don't know how to fix... HELP
>
> thx 4 reading.

Point 0: It helps if you post a copy of what the actual screen display
looked like, instead of just saying "Error occurs!!!".

It helps in that people are more likely to be bothered helping you,
instead of just writing you off as clueless and unclueable -- and as
you have chosen to try Python, you can't be utterly beyond redemption
:-)

Point 1: So, which error? Let's guess:

You got something like this:

!    print \
!           ^
!SyntaxError: invalid token

If so, that is very likely because you had one or more spaces after the
\. Backslash means line-continuation only if it is the LAST character
in the line.

If not, see point 0.

Point 2: so-called multiple quotes: this is nothing to do with your
problem. The different ways of quoting differ only in what characters
like other quotes and newlines can appear inside the quotes.

>>> 'I am John' is """I am John"""
True

Point 3: To print using what you call variables:

>>> I = 'John'
>>> print I, 'used to ...'
John used to ...
>>> print '%s used to ...' % I
John used to ...
>>> I = 'Fred'
>>> print '%s used to ...' % I
Fred used to ...
>>> print I, 'used to ...'
Fred used to ...
>>>

Point 4: How far through the Python tutorial have you progressed?

Point 5: If some bright spark suggests something like the following,
ignore them until you are up to speed on points[:5]:

>>> print '%(I)s used to ...' % locals()
Fred used to ...

Point 6: If you don't understand the meaning of [:5], refer to point 4.

HTH,

John



From alanmk at hotmail.com  Thu Feb 10 18:03:43 2005
From: alanmk at hotmail.com (Alan Kennedy)
Date: Thu, 10 Feb 2005 23:03:43 +0000
Subject: Python and version control
In-Reply-To: <tnon01pqep6idn81mhhrtjf8an1p07ut3p@4ax.com>
References: <XNrOd.1657$Mw3.72@amstwist00>
	<avOdnSfqFtw2z5ffRVn-1w@powergate.ca>
	<tnon01pqep6idn81mhhrtjf8an1p07ut3p@4ax.com>
Message-ID: <jHROd.47313$Z14.32739@news.indigo.ie>

[Peter Hansen]
>>BTW, as a general caution: while Visual Source Safe may be
>>"easy", it's also dangerous and has been known to corrupt
>>many a code base, mine included.  I wouldn't touch the product
>>with a virtual ten-foot pole

[Christos TZOTZIOY Georgiou]
> Are you sure you got the acronym right?-)  It seems that VSS provides viRTual
> source-safety...

In my circles, VSS is most often referred to as Visual Source Unsafe.

-- 
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan


From andreasp+python at qbcon.com  Mon Feb 28 04:19:54 2005
From: andreasp+python at qbcon.com (Andreas Pauley)
Date: Mon, 28 Feb 2005 11:19:54 +0200 (SAST)
Subject: User Security (Roles & Permissions)
Message-ID: <Pine.LNX.4.61.0502281055560.10469@skywalker.lan.qbcon.com>

Hi all,

I'm starting with a Point of Sale system (QT gui, MySQL db) and I'm 
wondering if there are any user management/user security modules available 
that can be reused independently of the specific system that you write.

I think something similar to the roles & permission scheme of Zope would 
work, were I can assign certain functionality/permissions to a role, and 
then assign each user a role.

I'd prefer not to fully jump into Zope just yet, because although it has 
just about all the features you can think of, it is also fairly complex 
(for me at least).

Regards,
Andreas


From PipedreamerGrey at yahoo.com  Tue Feb 15 09:04:42 2005
From: PipedreamerGrey at yahoo.com (PipedreamerGrey at yahoo.com)
Date: 15 Feb 2005 06:04:42 -0800
Subject: PythonCard and Py2Exe
Message-ID: <1108476282.790371.155670@l41g2000cwc.googlegroups.com>

I've been banging my head against this problem for a week.  It's time
to ask for help, because I'm obviously not going to solve this by trial
and error.  I'm trying to create a standalone version (.exe) of
PythonCard's Custdb sample using Py2Exe version 0.5.0.  Everytime I
attempt to compile the program, I get an error during compilation.  I
need to formulate the correct setup file.  Here's the one I began with:


from distutils.core import setup
from PythonCard import dialog, model
import PythonCard
import py2exe

setup( name = "custdb",
       console = ["custdb.py"],
       data_files = [ (".", ["custdb.ini", "custdb.rsrc.py",
"customerdata.csv"]) ]
       )

Every variation of this format failed.  Does anyone have any ideas of
how to re-write this Setup file?



From eric_brunel at despammed.com  Wed Feb  9 08:50:36 2005
From: eric_brunel at despammed.com (Eric Brunel)
Date: Wed, 09 Feb 2005 14:50:36 +0100
Subject: tkinter menu bar problem
References: <gAmOd.31235$68.23603@fe1.news.blueyonder.co.uk>
Message-ID: <opslxnemnrrqur0o@eb.pragmadev>

On Wed, 09 Feb 2005 11:35:40 GMT, John Pote <johnpote at blueyonder.co.uk>  
wrote:

> I have a menu bar in a top level window as follows
[snip code]
>
> Q1 Cannot find a way of changing the menu bars background colour. When
> colour options are accepted they seem to be ignored. Is this a native  
> look
> and feel characteristic of write once run anywhere, not yet implemented  
> or
> possibly a bug.

Even if the tk man pages [1] don't mention it, it would not be surprising  
if the background option for menu items did not work on Windows, since  
many things seem to be "hardcoded" on this platform. I tested the  
following code on Linux; it works without problem and has the expected  
behaviour:

>>> from Tkinter import *
>>> root = Tk()
>>> mb = Menu(root)
>>> root.configure(menu=mb)
>>> m = Menu(mb)
>>> mb.add_cascade(label='Menu', menu=m)
>>> m.add_command(label='Quit', command=root.quit, background='red')

If it is what you did and if it doesn't work on Windows, it is likely that  
the background option for menu items is not supported for this platform...

> Q2 Some of the menu options in the config menu will not always be  
> available
> depending on program state. How can individual items in such a menu be
> turned to faint gey to indicate their unavailability. Also a tick mark
> against an item would be useful to show the currently selected option. Is
> this possible?

To "grey out" a menu item:

parentMenu.entryconfigure(itemIndex, state=DISABLED)

To have menu items with a check-mark, use the add_checkbutton or  
add_radiobutton methods on the parent menu. Their use is similar to the  
Checkbutton and Radiobutton classes. See [1] for all available options.

[1] http://www.tcl.tk/man/tcl8.4/TkCmd/menu.htm
  - Eric Brunel -


From aisaac0 at verizon.net  Fri Feb 11 11:57:09 2005
From: aisaac0 at verizon.net (David Isaac)
Date: Fri, 11 Feb 2005 16:57:09 GMT
Subject: a sequence question
References: <lzrKd.138680$K7.56500@news-server.bigpond.net.au><Xns95EC9DCBC6294duncanrcpcouk@127.0.0.1>	<mailman.1553.1106960946.22381.python-list@python.org><WYXOd.16353$uc.1671@trnddc02>
	<mailman.2388.1108127294.22381.python-list@python.org>
Message-ID: <Ft5Pd.26094$uc.8481@trnddc03>

> Alan Isaac wrote:
> > I see that [iter(l)]*N produces an N element list with each element
being
> > the same iterator object, but after that
> > http://www.python.org/doc/2.3.5/lib/built-in-funcs.html
> > just didn't get me there.

"Nick Coghlan" <ncoghlan at iinet.net.au> wrote in message
news:mailman.2388.1108127294.22381.python-list at python.org...
> Py> itr = iter(range(10))
> Py> zipped = zip(*(itr,)*3) # How does this bit work?
> # Manual zip, actually behaving somewhat like the real thing
> Py> itr = iter(range(10))
> Py> zipped = []
> Py> try:
> ...   while 1: zipped.append((itr.next(), itr.next(), itr.next()))
> ... except StopIteration:
> ...   pass


http://www.python.org/doc/2.3.5/lib/built-in-funcs.html says:

"This function returns a list of tuples,
  where the i-th tuple contains the i-th element from each of the argument
sequences."

So an "argument sequence" can in fact be any iterable,
and these in turn are asked *in rotation* for their yield, right?
So we pass the (identical) iterables in a tuple or list,
thereby allowing a variable number of arguments.
We unpack the argument list with '*',
which means we have provided three iterables as arguments.
And then zip works as "expected",
once we have learned to expect zip to "rotate" through the arguments.
Is that about right?

If that is right, I still cannot extract it from the doc cited above.
So where should I have looked?

Thanks,
Alan Isaac




From mogmios at mlug.missouri.edu  Thu Feb  3 12:22:22 2005
From: mogmios at mlug.missouri.edu (Michael)
Date: Thu, 03 Feb 2005 09:22:22 -0800
Subject: character sets? unicode?
Message-ID: <42025DCE.8080309@mlug.missouri.edu>

I'm trying to import text from email I've received, run some regular 
expressions on it, and save the text into a database. I'm trying to 
figure out how to handle the issue of character sets. I've had some 
problems with my regular expressions on email that has interesting 
character sets. Korean text seems to be filled with a lot of '=3D=21' 
type of stuff. This doesn't look like unicode (or am I wrong?) so does 
anyone know how I should handle it? Do I need to do anything special 
when passing text with non-ascii characters to re, MySQLdb, or any other 
libraries? Is it better to save the text as-is in my db and save the 
character set type too or should I try to convert all text to some 
default format like UTF-8? Any advice? Thanks.

-- 
Michael <mogmios at mlug.missouri.edu>
http://kavlon.org



From timr at probo.com  Wed Feb  9 02:32:37 2005
From: timr at probo.com (Tim Roberts)
Date: Tue, 08 Feb 2005 23:32:37 -0800
Subject: Python mail filter 
References: <4208f1d0$1@news.starhub.net.sg>
Message-ID: <92fj011sghl3nmrhef8h951r1aa8vp66vl@4ax.com>

"Mailer" <mailer at pymailer.com> wrote:
>
>(P.S. I am very much aware of the existence of procmail, TMDA etc. My
>requirements are very specific and requires integration with another
>program, so I am only interested in getting a custom solution).

But are you aware that a procmail recipe can feed a message through a
filter, and then pass the results of that filter back in to the e-mail
system for further processing?

It seems to me that you should consider letting procmail do what it is good
at, and use your Python solution for the things that are beyond it.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From itsme at yahoo.com  Wed Feb 23 15:09:59 2005
From: itsme at yahoo.com (It's me)
Date: Wed, 23 Feb 2005 20:09:59 GMT
Subject: Pythoncard - Mistake in walkthrough?
References: <e0f0f902.0502230849.3441e26a@posting.google.com>
Message-ID: <rq5Td.6562$OU1.2627@newssvr21.news.prodigy.com>

As stated in the on-line WalkThrough, the information there was written for
an older version of the program.


"Deltones" <vibroverb at hotmail.com> wrote in message
news:e0f0f902.0502230849.3441e26a at posting.google.com...
> Hi all,
>
> I'm just getting into Python/wxPython/Pythoncard and I'm trying the
> tutorial from this page:
> http://pythoncard.sourceforge.net/walkthrough1.html
>
> Is it me who's totally dense or there's some sort of confusion with
> this tutorial?
>
> Here's what is said in the tutorial:
>
> Open the file starter1.py in your Python-aware editor of choice. The
> Python script is, as you'd expect, brief and to the point. Here's the
> important part to focus on:
>
> def on_menuFileExit_select(self, event):
>     pass
>
>
> But here's the starter1.py code:
>
> #!/usr/bin/python
>
> from PythonCard import model
>
> class Minimal(model.Background):
>     pass
>
> if __name__ == '__main__':
>     app = model.Application(Minimal)
>     app.MainLoop()
>
>
> As you can see, the on_menu line is not in the starter1.py original
> script, so I guessed that it should be a part of the Minimal class.
>
> Then the tutorial ask me to replace the on_menu "pass" line with:
>
> result = dialog.alertDialog(self, 'It works!', 'Showing Off')
>
> but when you run the script, it runs, but clicking on Exit does not
> display any dialog box. I did change the import line to include
> dialog.
>
> Is there something I'm not seeing here or there is really a mistake
> with the walkthrough?
>
> Thanks
>
> Denis




From mwm at mired.org  Tue Feb  8 22:35:50 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 08 Feb 2005 21:35:50 -0600
Subject: negative integer division
References: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
	<42096EAD.879E8A5F@yahoo.com>
Message-ID: <86wtti76cp.fsf@guru.mired.org>

Jive Dadson <jdadson at yahoo.com> writes:

> Python does it right.  C is allowed to do it anyway it likes, which was
> a stupifyingly horrible decision, IMHO.

C only does it wrong if you think that C is a high level language. It
isn't - it's a portable assembler. As such, low level things (like
this, or what happens on integer overflow, or ...) are left up to the
implementation, so it can do what's most natural for the underlying
hardware. This means that when you don't care - which I'd argue is
most of the time - you get the fastest thing the machine will do. When
you do care, you have to take care of it yourself. Of course, if you
care, you probably shouldn't be writing in assembler, you should
probably be writing in a high level language - which will make sure
the low level things get done right, irregardless of what the
underlying machine does.

Now, I'll agree with you if you want to argue that some machines do
negative integer division in stupifyingly horrible ways.

         <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From fuzzyman at gmail.com  Tue Feb  8 04:46:33 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 8 Feb 2005 01:46:33 -0800
Subject: AsciiDoc 6.0.0
In-Reply-To: <mailman.2072.1107787181.22381.python-list@python.org>
References: <4204241E.6010504@methods.co.nz>
	<mailman.2072.1107787181.22381.python-list@python.org>
Message-ID: <1107855993.072360.48950@g14g2000cwa.googlegroups.com>


Donnal Walter wrote:
> Stuart Rackham wrote:
> > AsciiDoc
> > --------
> > AsciiDoc is an uncomplicated text document format for writing short
> > documents, articles, books and UNIX man pages.
> >
> > AsciiDoc files can be translated to HTML (with or without
> > stylesheets), DocBook (articles, books and refentry documents)
> > and LinuxDoc using the asciidoc(1) command.
>
> Lately I've been thinking about using reStructuredText for creating
> simple web pages. Should I consider AsciiDoc as an alternative, and
if
> so, what are its advantages by comparison? Thanks.
>
> Donnal Walter

I've never used AsciiDoc - I've always found reST and docutils good
though :-)

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From enleverlesO.OmcO at OmclaveauO.com  Mon Feb 21 21:10:23 2005
From: enleverlesO.OmcO at OmclaveauO.com (Do Re Mi chel La Si Do)
Date: Tue, 22 Feb 2005 03:10:23 +0100
Subject: UTF-8 / German,
	Scandinavian letters - is it really this difficult?? Linux &
	Windows XP
References: <cve1vh$c37$1@phys-news1.kolumbus.fi>
Message-ID: <421ae161$0$1251$8fcfb975@news.wanadoo.fr>

Hi !

For test your system, please, read this url :
    http://sivanataraja.free.fr/config/test.htm  (french)
    http://www.alanwood.net/unicode/  (english)

And many explains : http://en.wikipedia.org/wiki/Unicode


And, to reassure you:  I had no probl?me for use unicode chars with Tk (my
tests on : French, German/Deutch, Cyrillic (russian), Grec).


@-salutations
-- 
Michel Claveau







From rt-announce-bounces at lists.bestpractical.com  Thu Feb 10 23:22:19 2005
From: rt-announce-bounces at lists.bestpractical.com (rt-announce-bounces at lists.bestpractical.com)
Date: Thu, 10 Feb 2005 23:22:19 -0500
Subject: Your message to RT-Announce awaits moderator approval
Message-ID: <mailman.782.1108095739.22590.rt-announce@lists.bestpractical.com>

Your mail to 'RT-Announce' with the subject

    Delivery service mail

Is being held until the list moderator can review it for approval.

The reason it is being held:

    Post by non-member to a members-only list

Either the message will get posted to the list, or you will receive
notification of the moderator's decision.  If you would like to cancel
this posting, please visit the following URL:

    http://lists.bestpractical.com/cgi-bin/mailman/confirm/rt-announce/eb7146bdb096adc46ca1d1d923b0a06af232b1c1



From farcepest at gmail.com  Thu Feb 17 19:20:01 2005
From: farcepest at gmail.com (Andy Dustman)
Date: 17 Feb 2005 16:20:01 -0800
Subject: Why doesn't join() call str() on its arguments?
References: <mailman.2728.1108595128.22381.python-list@python.org>
	<4214fea9$0$20394$636a15ce@news.free.fr>
Message-ID: <1108686001.198554.21520@g14g2000cwa.googlegroups.com>

I did some timings of ''.join( <list comprehension> ) vs. ''.join(
<generator expression> ) and found that generator expressions were
slightly slower, so I looked at the source code to find out why. It
turns out that the very first thing string_join(self, orig) does is:

        seq = PySequence_Fast(orig, "");

thus iterating over your generator expression and creating a list,
making it less efficient than passing a list in the first place via a
list comprehension.

The reason it does this is exactly why you said: It iterates over the
sequence and gets the sum of the lengths, adds the length of n-1
separators, and then allocates a string this size. Then it iterates
over the list again to build up the string.

For generators, you'd have to make a trial allocation and start
appending stuff as you go, periodically resizing. This *might* end up
being more efficient in the case of generators, but the only way to
know for sure is to write the code and benchmark it.

I will be at PyCon 2005 during the sprint days, so maybe I'll write it
then if someone doesn't beat me to it.  I don't think it'll be all that
hard. It might be best done as an iterjoin() method, analogous to
iteritems(), or maybe xjoin() (like xrange(), xreadlines()).

Incidentally, I was inspired to do the testing in the first place from
this:

http://www.skymind.com/~ocrow/python_string/

Those tests were done with Python-2.3. With 2.4, naive appending (i.e.
doing s1 += s2 in a loop) is about 13-15% slower than a list
comprehension, but uses much less memory (for large loops); and a
generator expression is about 7% slower and uses slightly *more* memory.



From ksenia.marasanova at gmail.com  Sat Feb 26 14:21:56 2005
From: ksenia.marasanova at gmail.com (Ksenia Marasanova)
Date: Sat, 26 Feb 2005 21:21:56 +0200
Subject: Making a calendar
In-Reply-To: <422071d5$0$22691$ba624c82@nntp04.dk.telia.net>
References: <422071d5$0$22691$ba624c82@nntp04.dk.telia.net>
Message-ID: <130df19305022611216f63530d@mail.gmail.com>

This is close to what you want: 
http://freespace.virgin.net/hamish.sanderson/htmlcalendar.html

You'll also need HTMLTemplate
http://freespace.virgin.net/hamish.sanderson/htmltemplate.html


From jeff at ccvcorp.com  Thu Feb 17 19:58:35 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Thu, 17 Feb 2005 16:58:35 -0800
Subject: super not working in __del__  ?
In-Reply-To: <mailman.2779.1108677594.22381.python-list@python.org>
References: <cuu0pu$t44$1@sea.gmane.org>	<cuuqrr$f1o$1@sea.gmane.org>	<mailman.2697.1108571847.22381.python-list@python.org>	<11171oljbbb5cd3@corp.supernews.com>	<mailman.2721.1108588986.22381.python-list@python.org>	<1117k2oedccgidb@corp.supernews.com>
	<mailman.2779.1108677594.22381.python-list@python.org>
Message-ID: <111afbnbs95t44b@corp.supernews.com>

Christopher J. Bottaro wrote:

> Jeff Shannon wrote:
> 
>>Python's __del__() is not a C++/Java destructor.
> 
> Learn something new everyday...  What is it then?  Excuse my ignorance, but
> what are you suppose to do if your object needs to clean up when its no
> longer used (like close open file handles, etc)? 

Well, those "open file handles" are presumably wrapped by file 
objects.  Those file objects will close the underlying file handle as 
they are deallocated.  This means that the only time you really need 
to worry about closing a file handle is if you want to reopen that 
same file immediately -- and in that case, __del__() can't help you 
because you can't know whether or not another reference to the file 
object exists somewhere else, so you'll have to explicitly close() the 
file anyhow.  The same goes for sockets.

> Are you use supposed to
> make a method called Destroy() or something and require users to call it
> when the object is about to be deleted?  That seems to put the burdon of
> ref counting on the user.  

Python's refcounting/GC scheme is such that you rarely actually need 
to explicitly destroy an object.  Unlike C++, you're not actually 
freeing memory, and most of the resources that you might be using are 
already wrapped by an object that will finalize itself properly 
without being explicitly destroyed.  Thanks to GC and the possibility 
of needing to break cycles, there's not much that you can guarantee 
about __del__() ... but there's not much that you *need* to do in 
__del__().

> It just seems
> like kinda a pain when a C++/Java style destructor would nicely do what is
> desired.  Should I just stop digging and chalk it up to a limitation of
> Python?

Well, I guess you could look at it as a trade-off.  In C++, you can 
count on your destructor getting called, but you have to do your own 
memory management.  (Note that you still can't count on heap objects 
that your destructor might want to use still being there -- it's just 
that you can *never* count on such things in C++, and are always 
expected to ensure these things yourself.)  Python will take care of 
your memory for you, and it will safely handle most OS resources for 
you, so that you don't have to worry about them... and in return, if 
you have some type of resource that Python doesn't automatically 
handle, you need to explicitly save it yourself.

Now, while I haven't yet done anything terribly complicated nor tried 
to use extensive persistence, I've essentially never felt a need to 
use __del__() in Python, nor missed the "proper" destructor of C++. 
In general, cleanup takes care of itself, and in those cases where I 
have more demanding needs, well, it's not *that* hard to hook into 
application shutdown and explicitly save my data.

So, I don't think it's so much a "limitation" of Python, as it is 
simply a different way of handling things.

Jeff Shannon



From steve at holdenweb.com  Tue Feb  1 11:28:16 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 01 Feb 2005 11:28:16 -0500
Subject: variable declaration
In-Reply-To: <44SdnUZGopnrAWLcRVn-pg@telcove.net>
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<uImdnUAKxbKaFWPcRVn-2A@telcove.net>
	<1107205410.367521.50490@f14g2000cwb.googlegroups.com>
	<44SdnUZGopnrAWLcRVn-pg@telcove.net>
Message-ID: <41FFAE20.7030802@holdenweb.com>

Thomas Bartkus wrote:

> "Carl Banks" <invalidemail at aerojockey.com> wrote in message
> news:1107205410.367521.50490 at f14g2000cwb.googlegroups.com...
> <snip>
> 
>>How common is it for a local variable to be bound in
>>more than one place within a function?
> 
> 
> How common?  It shouldn't happen at all and that was the point.

This seems a little excessive to me. Sample use case:

for something in lst:
   if type(something) != type(()):
     something = tuple(something)

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005          http://www.python.org/pycon/2005/
Steve Holden                           http://www.holdenweb.com/


From jerf at jerf.org  Sat Feb  5 10:15:50 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Sat, 05 Feb 2005 10:15:50 -0500
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
References: <ctsjmg$75p$1@usenet.otenet.gr>
	<pan.2005.02.03.19.10.39.349763@jerf.org>
	<cu2m3q$km1$1@usenet.otenet.gr>
Message-ID: <pan.2005.02.05.15.15.49.213624@jerf.org>

On Sat, 05 Feb 2005 16:44:11 +0200, Ilias Lazaridis wrote:
>> * Deployment: I don't generally have enough problems with this to be
>> worth thinking about. I don't know what the state of the remote
>> debugging is on Python; Google "remote debugging Python".
> 
> [I like to avoid interaction with google.]

OK, this, combined with a reputation that didn't quite precede you, but
came close, leads me to say this: I've given you what you're going to get.
You want more, you're going to have to put some effort into it. Lots of
effort. 

But I can give you this: If you aren't already there, you're a textbook
case of somebody heading for analysis paralysis. It's time to stop
researching and start programming; grab Python, do a couple tutorials, and
start acquiring the skills you're going to need to do these other tasks
you want to do anyhow. 

Barring evidence that you are taking responsibility for yourself, I'm not
inclined to help much more.


From noreply at bidfraud.com  Fri Feb 18 20:12:26 2005
From: noreply at bidfraud.com (bidfraud)
Date: Sat, 19 Feb 2005 01:12:26 GMT
Subject: www.bidfraud.com "Grand Opening" -- Read Inside for capabilities
Message-ID: <qj4d115os09ks8nq854v7korshkg0gmhhl@4ax.com>

www.bidfraud.com "Grand Opening" -- Read Inside for capabilities

After 1000 plus hours in development - Bidfraud.com is "breathing."

http://www.bidfraud.com

Features:

Capable of archiving ebay auction transactions locally on our server.
This is important, as ebay deletes transactions every few months.  It
is as simple as entering an ebay item number when creating a report.

example of archived ebay page:

http://www.bidfraud.com/cachedpages/6113839605/alouette-amusement/6113839605.html

The above archived page, while it still exists at bidfraud.com, no 
longer exists at ebay.com

Report templates contain an area to write a narrative as well as an
interface to upload as many as 10 images/files (word & excel, etc.)
The use of pictures as well as other supporting documents will help
to substantiate & validate a claim.

example of report with pictures:

http://www.bidfraud.com/example.php

Easy search interface capable of finding a suspect by user name,
email or item number at various sites.

Simple private messaging, including a chat system are provided.

Registration is Free.

Easy to use interface.

If you wish to advertise on the site, it is free, but space is
limited.
Please use contact page on www.bidfraud.com to make a request.

example of ad layout/dimensions:

http://www.bidfraud.com/ads.htm

Next time you leave negative feedback at ebay or any other site,
please reference them to bidfraud.

Thank you. 



From skip at pobox.com  Wed Feb  2 11:03:12 2005
From: skip at pobox.com (System Administrator)
Date: Wed, 2 Feb 2005 10:03:12 -0600
Subject: Python Code Auditing Tool
In-Reply-To: <7xhdkvbjab.fsf@ruckus.brouhaha.com>
References: <pan.2005.02.02.05.47.52.827795@flaminglunchbox.net>
	<7xhdkvbjab.fsf@ruckus.brouhaha.com>
Message-ID: <16896.63936.828022.197184@montanaro.dyndns.org>


    >> Does anybody know of a tool that can tell me all possible exceptions
    >> that might occur in each line of code?  What I'm hoping to find is
    >> something like the following:

    Paul> That is impossible.  The parameter to the raise statement is a
    Paul> class object, which can be anything.

Sure, but in all but the rarest of cases the first arg to raise is a
specific exception, probably one of the standard exceptions.  In the Python
code in the distribution (ignoring the test directory where all sorts of
mischief is done to stress things), here are the most common words following
"raise" where "raise" is the first word on the line:

    % find . -name '*.py' \
    > | egrep -v '\./test' \
    > | xargs egrep '^ *raise ' \
    > | awk '{print $3}' \
    > | sed -e 's/[(,].*//' \
    > | sort \
    > | uniq -c \
    > | sort -rn \
    > | head -15
     246 ValueError
     227 aetools.Error
     216 Error
     124 TypeError
     101 error
      75 RuntimeError
      53 IOError
      36 NotImplementedError
      36 ImportError
      36 EOFError
      31 SyntaxError
      23 KeyError
      23 AttributeError
      22 DistutilsPlatformError
      21 UnicodeError

Without checking, my guess is that #5 ("error") is one of a handful of
exception classes defined at module scope (ftplib, anydbm, sre_constants,
poplib, among others all define such an exception class), and not a variable
that accepts multiple values as in your example.

In short, while not perfect, simply grepping for '^ *(class|def|raise) ' and
printing the first and second words of each output line would probably give
you a pretty good idea of what gets raised where.

Skip


From fperez.net at gmail.com  Fri Feb  4 17:46:19 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Fri, 04 Feb 2005 15:46:19 -0700
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot><1107487113.732375.110850@c13g2000cwb.googlegroups.com><opslnmywarej1m1c@ashot><mailman.1865.1107491434.22381.python-list@python.org><opsln54fpwej1m1c@ashot>
	<36hculF51ho2sU1@individual.net><1107530489.308497.103530@g14g2000cwa.googlegroups.com><36hrjpF4ui8fbU1@individual.net>
	<mailman.1911.1107546744.22381.python-list@python.org>
	<36i84qF52ce29U1@individual.net> <opslo127s7ej1m1c@ashot>
Message-ID: <cu0tu9$alv$1@sea.gmane.org>

Ashot wrote:

> this is what it looks like:
> 
> http://www.freshraisins.com/sand/ipythonscreen.PNG
> 
> does cygwin have a readline utility in it?  Perhaps this is overriding the
> correct one?  Thats the only thing I can think of.

Thanks for the screenshot.  I've contacted the readline author, I'll report
back when there are news about a possible fix.

Regards,

f



From ilias at lazaridis.com  Mon Feb 21 18:58:58 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 22 Feb 2005 01:58:58 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <37uk2kF5gv38bU1@individual.net>
References: <cuo71l$gig$1@usenet.otenet.gr> <cvaoft$av6$1@usenet.otenet.gr>
	<874qg6937w.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<cvcv9b$nbm$1@usenet.otenet.gr> <37uk2kF5gv38bU1@individual.net>
Message-ID: <cvdsk3$2ep$1@usenet.otenet.gr>

George Sakkis wrote:
> "Ilias Lazaridis" <ilias at lazaridis.com> wrote in message news:cvcv9b$nbm$1 at usenet.otenet.gr...
> 
>>Nick Vargish wrote:
>>
>>>You can excuse yourself from this one and stop replying to comments,
>>>but you don't get to unilaterally declare a discussion over.
>>[...]
>>
>>The discussion is over.
>>
>>At least the in-topic one.
>>
>>Everything else is babbling, hairsplitting, playing an AI which does not
>>understand writings and all this unproductive garbage.
>>
>>The Essence is this one, as stated before:
>>
>>[huge copy paste of previous post]
> 
> The Essence is irrelevant.

It seems that this is true.

> -
> -
> -
> All your thread are belong to us.

This is true ["us" = a few off-topic-freaks]

> -
> -
> -
> 
> George

[EVALUATION] - E02 - Support for MinGW Open Source Compiler
Essence:
http://groups-beta.google.com/group/comp.lang.python/msg/5ba2a0ba55d4c102

.

-- 
http://lazaridis.com


From Dennis.Benzinger at gmx.net  Tue Feb  1 17:58:06 2005
From: Dennis.Benzinger at gmx.net (Dennis Benzinger)
Date: Tue, 01 Feb 2005 23:58:06 +0100
Subject: MySQLdb - Tuples
In-Reply-To: <3vTLd.19498$Of5.13133@nntpserver.swip.net>
References: <3vTLd.19498$Of5.13133@nntpserver.swip.net>
Message-ID: <4200097f$1@news.uni-ulm.de>

Lajos Kuljo wrote:
> Hallo,
> ich bin voll neu im Python-Programming, deshalb ist mein Problem 
> wahrscheinlich trivial:
> 
> Wenn ich die Script
> #########################################33
> #! /usr/bin/env python
> import MySQLdb
> db=MySQLdb.connect(host='localhost', db='photum_0_6_2', user='root', 
> passwd='thkhgfgd')
> c=db.cursor()
> c.execute('select person from persons order by person')
> tup=c.fetchall()
> for a in tup:
>    print a
> ################################################
> ausf?hre, erhalte ich Dinge wie
> ('Dieter',)
> ('Hulda',)
> ....
> 
> Ich brauche die Klammern, Apostrphe und Kommas nicht (ich will nur die 
> Inhalte) und kann ich sie nicht loswerden. Versucht habe ich u. a. print 
> a[2:-3] was nur zwei Klammern bringt.
> b=lstrip(a, "(") haut auch nicht hin.
> Weiss jemand Rat?

Hab gerade kein MySQL da, aber ?nder mal

for a in tup:
    print a

in

for a in tup:
    print a[0]  # Das erste Element des Tupels


Dann wird statt des ganzen Tupels nur das erste Element ausgegeben.


> P.S. Woher kommen diese Klammern und Apostrophen, vom MySQLdb?

Die Klammern und Apostrophe kommen daher, dass tup ein Tupel
(http://docs.python.org/lib/typesseq.html) mit einem Element
(der Person) ist.


Dennis


From exogen at gmail.com  Sat Feb 12 21:55:21 2005
From: exogen at gmail.com (Brian Beck)
Date: Sat, 12 Feb 2005 21:55:21 -0500
Subject: Iterate through dictionary of file objects and file names
In-Reply-To: <mailman.2464.1108257149.22381.python-list@python.org>
References: <420deb18$1_1@news.iprimus.com.au>	<cuku8r$q5s$1@eeyore.INS.cwru.edu>
	<mailman.2464.1108257149.22381.python-list@python.org>
Message-ID: <cumfoc$5cn$1@eeyore.INS.cwru.edu>

jfj wrote:
> Call me a pedant, but what'd wrong with:
> 
>     print 'closed: ' + filename
> or
>     print 'closed:', filename
> 
> ?

I always figure that debug-oriented output like that in example code is 
very likely to be changed in format, or to include more information, by 
the person actually using it. So string substitution makes it more 
flexible; less work for them.

--
Brian Beck
Adventurer of the First Order


From grante at visi.com  Tue Feb 15 16:53:42 2005
From: grante at visi.com (Grant Edwards)
Date: 15 Feb 2005 21:53:42 GMT
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr>
	<XX+64LRqnLECFwAV@objmedia.demon.co.uk>
	<cut6t9$sla$1@usenet.otenet.gr>
	<42123751$0$10042$626a14ce@news.free.fr>
	<cutem3$2t6$2@usenet.otenet.gr>
	<421244f0$0$30339$636a15ce@news.free.fr>
Message-ID: <42126f66$0$46556$a1866201@visi.com>

On 2005-02-15, bruno modulix <onurb at xiludom.gro> wrote:
> Ilias Lazaridis wrote:
>
>> impressive.
>> 
>> but things are much simpler.
>
> Could you be more prolific ?

Good god, let's hope not!

-- 
Grant Edwards                   grante             Yow!  I'm working under
                                  at               the direct orders of WAYNE
                               visi.com            NEWTON to deport consenting
                                                   adults!


From suryaprakashg at gmail.com  Thu Feb 10 12:33:43 2005
From: suryaprakashg at gmail.com (suryaprakashg at gmail.com)
Date: 10 Feb 2005 09:33:43 -0800
Subject: Newbie: SWIG or SIP?
In-Reply-To: <mailman.2297.1108027503.22381.python-list@python.org>
References: <cKKdnfEhSpyv65ffRVn-qg@comcast.com>
	<mailman.2297.1108027503.22381.python-list@python.org>
Message-ID: <1108056823.384640.133250@f14g2000cwb.googlegroups.com>

Look at this , this might be more simple to use

http://starship.python.net/crew/theller/ctypes/



Phil Thompson wrote:
> > I have a third-party DLL and it's associated .h file.  The DLL was
written
> > in C.  I have neither the associated .c files nor the .obj files
for the
> > DLL.  Can I use SWIG or SIP to build something that will allow me
to use
> > the
> > DLL with Python?  And what is that something, an .obj file, another
DLL or
> > what?
>
> Yes, you can use either SWIG or SIP. C (as opposed to C++) support
was
> added with SIP v4. The something is another DLL, conventionally given
a
> .pyd extenstion.
> 
> Phil



From adykes at panix.com  Fri Feb  4 09:20:39 2005
From: adykes at panix.com (Al Dykes)
Date: 4 Feb 2005 09:20:39 -0500
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<mailman.1859.1107481066.22381.python-list@python.org>
Message-ID: <cu00bn$jdf$1@panix5.panix.com>

In article <mailman.1859.1107481066.22381.python-list at python.org>,
Dave Brueck  <dave at pythonapocrypha.com> wrote:
>Paul Rubin wrote:
>> How would you go about building such a site?  Is LAMP really the right
>> approach?
>
>Two major problems I've noticed, don't know if they are universal, but they sure 
>hurt the performance:
>
>1) Some sites have not put any thought into caching - i.e. the application 
>server is serving up images or every single page is dynamically generated even 
>though all (or most) of it is static such that most of the requests just aren't 
>cacheable.
>
>2) Because a database is there, it gets used, even when it shouldn't, and it 
>often gets used poorly - bad or no connection pooling, many trips to the 
>database for each page generated, no table indices, bizarro database schemas.
>
>Overall I'd say my first guess is that too much is being generated on the fly, 
>often because it's just easier not to worry about cacheability, but a good web 
>cache can provide orders of magnitude improvement in performance, so it's worth 
>some extra thought.
>
>One project we had involved the users navigating through a big set of data, 
>narrowing down the set by making choices about different variables. At any point 
>it would display the choices that had been made, the remaining choices, and the 
>top few hits in the data set. We initially thought all the pages would have to 
>be dynamically generated, but then we realized that each page really represented 
>a distinct and finite state, so we went ahead and built the site with Zope + 
>Postgres, but made it so that the URLs were input to Zope and told what state to 
>generate.
>
>The upshot of all this is that we then just ran a web spider against Zope any 
>time the data changed (once a week or so), and so the site ended up "feeling" 
>pretty dynamic to a user but pretty much everything came straight out of a cache.
>
>-Dave


A couple years ago the Tomshardware.com website was reengeneered to
cache everything possible with great performance improvement. They wrote 
a nice article about the project, which I assume is still online.  I don't

-- 

a d y k e s @ p a n i x . c o m 

Don't blame me. I voted for Gore.


From nick at craig-wood.com  Mon Feb 28 05:30:03 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 28 Feb 2005 10:30:03 GMT
Subject: Flushing print()
References: <mailman.3029.1109296238.22381.python-list@python.org>
	<cvm2s2$2gfl$1@agate.berkeley.edu> <d9c4f2-sv9.ln1@lairds.us>
Message-ID: <slrnd25s1l.cvr.nick@irishsea.home.craig-wood.com>

Cameron Laird <claird at lairds.us> wrote:
>  gf, remember to write
> 
>    sys.stdout.flush()
> 
>  rather than
> 
>    sys.stdout.flush
> 
>  That's a mistake that catches many.

Many old perl programmers anyway (me included)!

Its also a mistake pychecker catches.

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


From sjmachin at lexicon.net  Thu Feb 17 15:00:29 2005
From: sjmachin at lexicon.net (John Machin)
Date: 17 Feb 2005 12:00:29 -0800
Subject: Alternative to standard C "for"
In-Reply-To: <mailman.2764.1108664524.22381.python-list@python.org>
References: <1107628331.816935.16760@o13g2000cwo.googlegroups.com>
	<740c3aec050205104924a82d23@mail.gmail.com>
	<1108620618.3892.85.camel@lipscomb.mbi.ucla.edu>
	<mailman.2764.1108664524.22381.python-list@python.org>
Message-ID: <1108670429.628087.326690@l41g2000cwc.googlegroups.com>

James Stroud wrote:
>
> It seems I need constructs like this all of the time
>
> i = 0
> while i < len(somelist):
>   if oughta_pop_it(somelist[i]):
>     somelist.pop(i)
>   else:
>     i += 1
>
> There has to be a better way...
>

! for i in xrange(len(somelist)-1, -1, -1):
!     if oughta_pop_it(somelist[i]):
!         del somelist[i] # why use pop??

We don't need no stinking iterators; we're the
Python_1.5_or_earlier_istas!



From deetsNOSPAM at web.de  Mon Feb  7 12:33:11 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 07 Feb 2005 18:33:11 +0100
Subject: Python Binary and Windows
References: <cu8805$emv$2@news.ox.ac.uk>
Message-ID: <36pms5F55738vU1@individual.net>

peetm wrote:

> Hi.
> 
> I'd like to compile (?) the DiffLib Python code into a binary form that
> can be called by other Windows apps - like, I'd like to compile it into a
> DLL.
> 
> Is this possible?

Not so easy. Better install WinDiff. If you really have to do it, elmer will
be of use for you.

http://www.python.org/moin/elmer

But it will still be far from being trivial.

-- 
Regards,

Diez B. Roggisch


From peter at engcorp.com  Wed Feb  2 12:54:13 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 02 Feb 2005 12:54:13 -0500
Subject: Python Code Auditing Tool
In-Reply-To: <ctqube$hue$1@panix2.panix.com>
References: <pan.2005.02.02.05.47.52.827795@flaminglunchbox.net>
	<7xhdkvbjab.fsf@ruckus.brouhaha.com>
	<mailman.1759.1107360282.22381.python-list@python.org>
	<ctqube$hue$1@panix2.panix.com>
Message-ID: <2LydnViDKZ1ejpzfRVn-qg@powergate.ca>

Roy Smith wrote:
> Skip Montanaro wrote:
>>    246 ValueError
>>    227 aetools.Error
>>    216 Error
>>    124 TypeError
>>    101 error
>>     75 RuntimeError
>>     53 IOError
>>     36 NotImplementedError
>>     36 ImportError
>>     36 EOFError
>>     31 SyntaxError
>>     23 KeyError
>>     23 AttributeError
>>     22 DistutilsPlatformError
>>     21 UnicodeError
> 
> It's kind of interesting (scarry?) that in roughly 20% of the cases
> nothing more specific than Error is raised.

(In case someone reading doesn't know) there isn't actually
an "Error" in the standard set of exceptions.  It seems
likely that pretty much all of those uses are actually
module-specific Errors, and as such they are probably much
more specific than the unadorned name might imply.

Also, when one is trying to pick an appropriate exception
to raise, it is often the case that none of the standard
exceptions seems appropriate.  In those cases (although I
personally would prefer a different name than "Error")
there's often no good alternative to making your own
unique module-specific Exception subclass.

-Peter


From steven.bethard at gmail.com  Thu Feb  3 17:29:13 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 03 Feb 2005 15:29:13 -0700
Subject: List mapping question
In-Reply-To: <g-mdnXrKqZd2Ap_fRVn-rw@midcoast.com>
References: <g-mdnXrKqZd2Ap_fRVn-rw@midcoast.com>
Message-ID: <RZqdne9TxtwqOJ_fRVn-gw@comcast.com>

Marc Huffnagle wrote:
> I have a number of variables that I want to modify (a bunch of strings 
> that I need to convert into ints).  Is there an easy way to do that 
> other than saying:
> 
>  > a = int(a)
>  > b = int(b)
>  > c = int(c)
> 
> I tried
> 
>  > [i = int(i) for i in [a, b, c]]
> 
> but that didn't work because it was creating a list with the values of 
> a, b and c instead of the actual variables themselves, then trying to 
> set a string equal to an integer, which it really didn't like.

Actually, that didn't work because it's a SyntaxError to have an 
assigment statement inside a list comprehension:

py> [i = int(i) for i in [a, b, c]]
Traceback (  File "<interactive input>", line 1
     [i = int(i) for i in [a, b, c]]
        ^
SyntaxError: invalid syntax

You could try something like:

py> a, b, c
('1', '2', '3')
py> a, b, c = [int(i) for i in (a, b, c)]
py> a, b, c
(1, 2, 3)

For a few variables, this is probably a reasonable solution.  For more 
than 4 or 5 though, it's going to get unreadable.  Of course for that 
many variables, you should probably be keeping them in a list instead of 
as separate names anyway...

Steve


From mikey666 at 666swampgas.666com  Wed Feb  2 09:54:08 2005
From: mikey666 at 666swampgas.666com (The Artist Formerly Known as Kap'n Salty)
Date: Wed, 02 Feb 2005 08:54:08 -0600
Subject: web camera or else ? 15-30 fps processing of camera videos.
In-Reply-To: <1107303983.662065.93580@c13g2000cwb.googlegroups.com>
References: <1107295229.657375.318750@o13g2000cwo.googlegroups.com>
	<420006a5$0$714$c3e8da3@news.astraweb.com>
	<1107303983.662065.93580@c13g2000cwb.googlegroups.com>
Message-ID: <4200e998$0$1539$c3e8da3@news.astraweb.com>

JGCASEY wrote:
> The Artist Formerly Known as Kap'n Salty wrote:
> 
>>Newbie wrote:
>>
>>>I am doing some robotics projects but my main area of interest is
>>>trying out several algorithms for the processing of the stream of
> 
> data
> 
>>>coming from the video.
>>>
>>>I am wondering what type of camera I should invest in. Either I
> 
> could
> 
>>>buy a web cam and hope I can find a driver I could either modify or
>>>use. i.e. every frame is somehow stored on the computer
> 
> automagically
> 
>>>or I could buy a camera not unlike the AVRcam
>>>(http://www.jrobot.net/Projects/AVRcam.html) or the CMUcam and try
> 
> to
> 
>>>do the processing once the data has been streamed to the nearest
>>>computer ? or should I use an expensive video card, some CCTV
> 
> camera
> 
>>>and a frame grabber to digitize photos so they can be processed
>>>afterwards. I expect my processing algorithms to handle at least 15
>>>frames per second framerate once they are working ont the final
> 
> set-up.
> 
>>>My constraints are that I would like to avoid as much as possible
>>>complex set-ups even if that means buying a more expensive camera
>>>set-up. For the prototyping, I would like to try my algorithms out
>>>using a combination of python and matlab (all very slow) and then
>>>expect the same architecture (image files location and flow) with
>>>speedier set-up like python+psyco or C. All the processing would be
>>>done on a computer dedicated for that. Windows or Linux are
> 
> possible.
> 
>>An easy approach to this is to use a wireless camera on your robot,
> 
> with
> 
>>the receiver attached to a frame grabber on a remote host. This
> 
> allows
> 
>>you your choice of camera (stand alone video transmitters are widely
>>available), and you are not limited to only processing hardware you
> 
> can
> 
>>carry on board your robot. You also get full FPS. Frame-grabber cards
> 
> 
>>are inexpensive and widely available for both Windows and Linux.
> 
> 
> I wanted to go down that path but cannot get
> information on how to access the images from
> the tv receiver card in real time using my
> own software.
> 
> Do you use Java?
> 
> John Casey
> 

I do, but not for image processing. There IS a multi-media SDK out there 
for java that handles video capture -- google should help you out here 
(I can't recall the site). I'm not entirely sure how mature it is. I 
looked a couple of years back and decided to avoid it. It likely does 
not support all platforms, since video capture drivers vary a good bit 
by platform. This all may have changed, however.

On Windows, you'll use DirectShow (part of DirectX) to get incoming 
frames. There's also the deprecated VFW (Video for Windows).

On linux, there's Video for Linux.

In either case, the APIs are not difficult to use. You should never have 
to access the hardware directly.

Note that whether you get the video from a webcam or framegrabber, the 
APIs are the same. I've actually abstracted some of the DirectX stuff 
out to the point that I can get frames from a video file *or* a camera 
the same way.

-- 
(Replies: cleanse my address of the Mark of the Beast!)

Teleoperate a roving mobile robot from the web:
http://www.swampgas.com/robotics/rover.html


From peter at somewhere.com  Tue Feb  8 15:24:48 2005
From: peter at somewhere.com (Peter Maas)
Date: Tue, 08 Feb 2005 21:24:48 +0100
Subject: Is Python as capable as Perl for sysadmin work?
In-Reply-To: <mailman.2204.1107885796.22381.python-list@python.org>
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
	<mailman.2204.1107885796.22381.python-list@python.org>
Message-ID: <36slkbF54d2sjU2@individual.net>

Jeff Epler schrieb:
> Unlike Perl, Python implements only a *finite turning machine* model of
> computation.  An easy way to see this limitation is in the following
> code:
>     >>> 1.0 / 10.0
>     0.10000000000000001
> In an infinite Turning machine, there would be an unbounded number of
> zeros before the second 1, giving the exact result, not a numeric
> approximation.

Boy, you are cheating us!!!! Wake up, this isn't April 1st! :)))

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From tom.willis at gmail.com  Tue Feb 22 19:02:47 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Tue, 22 Feb 2005 19:02:47 -0500
Subject: python tutorial/projects
In-Reply-To: <b54d048905022215561560447@mail.gmail.com>
References: <cvgf2o$u42$1@agate.berkeley.edu>
	<56190b6c050222154816a2e2a3@mail.gmail.com>
	<b54d048905022215561560447@mail.gmail.com>
Message-ID: <b54d048905022216023577621e@mail.gmail.com>

You know, I hate doing this....

I just remembered the Bruce Eckel book is a direct transaltion from
THinking In Patterns for Java.

And as such the example python code within the chapters is not even
valid Python.


If you're new to the language you'll get confused with the use of
private and static thrown everywhere.

It's still good information though.




On Tue, 22 Feb 2005 18:56:24 -0500, Tom Willis <tom.willis at gmail.com> wrote:
> I found this one helpful
> 
> http://diveintopython.org/
> 
> and this one
> 
> http://ibiblio.org/obp/thinkCS/python/english/
> 
> Just found this one
> http://hetland.org/python/instant-python
> 
> and this page has links to many more.
> 
> http://www.python.org/doc/Intros.html
> 
> And because I'm a huge Bruce Eckel fan.
> 
> Thinking in Python
> http://mindview.net/Books/TIPython
> 
> It's old, but I still go through it every now and then.
> 
> 
> --
> Thomas G. Willis
> http://paperbackmusic.net
> 
> 
> On Tue, 22 Feb 2005 16:48:48 -0700, Steve Juranich <sjuranic at gmail.com> wrote:
> > I think the tutorial offered at www.python.org/tut/tut.html is as good
> > a starting place as any.
> >
> > I wouldn't be able to suggest a "non-trivial" project without knowing
> > more about your background.  Can you do a flashcard program? recipe
> > organizer? SETI at Home client? (I think you see where this is going).
> >
> > Good luck.
> >
> > On Tue, 22 Feb 2005 15:23:37 -0800, Danny
> > <dannyant at kingkong.me.berkeley.edu> wrote:
> > > Does anyone know of a good python tutorial?
> > > I was also looking for some non-trivial projects to do in python.
> > >
> > > Basically I would like to claim on my resume, that I know python, with
> > > out bad karma.
> > >
> > > Danny
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> > >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
> 


-- 
Thomas G. Willis
http://paperbackmusic.net


From zathras at thwackety.com  Sat Feb 12 08:12:34 2005
From: zathras at thwackety.com (Michael Sparks)
Date: Sat, 12 Feb 2005 13:12:34 +0000 (GMT)
Subject: Python in EDA
In-Reply-To: <1108165423.522756.151000@z14g2000cwz.googlegroups.com>
Message-ID: <Pine.LNX.4.44.0502121306030.1685-100000@pingu.thwackety.com>

On 11 Feb 2005 vsapre80 at gmail.com wrote:

> Hi,
>
> I am new to Python and coming from the EDA/VLSI Design background.
>
> I wanted to know if there are some active projects going on EDA modules
> written in Python.

You may want to take a look at MyHDL & APVM/Oroboro:
   * http://jandecaluwe.com/Tools/MyHDL/Overview.html
   * http://apvm.sourceforge.net/ (and specifically
     http://apvm.sourceforge.net/oro_025.html)

The former aims to used python as an HDL allowing a subset of python to be
used to design hardware, the latter is aimed at helping verilog based
hardware verification (by the looks of things).

Both use python generators to handle concurrency. For a brief and nice
introduction to generators, it's well worth reading this article:
   * http://www-106.ibm.com/developerworks/linux/library/l-pythrd.html

Best Regards,


Michael.



From janeaustine50 at hotmail.com  Wed Feb 23 20:35:24 2005
From: janeaustine50 at hotmail.com (janeaustine50 at hotmail.com)
Date: 23 Feb 2005 17:35:24 -0800
Subject: Style guide for subclassing built-in types?
In-Reply-To: <mailman.2977.1109182909.22381.python-list@python.org>
References: <ba1e306f.0502221846.70cb4d5c@posting.google.com>
	<1109127834.660822.247120@g14g2000cwa.googlegroups.com>
	<1109150091.356411.150460@l41g2000cwc.googlegroups.com>
	<1109151417.903188.73790@f14g2000cwb.googlegroups.com>
	<421c76cd$1_1@newspeer2.tds.net>
	<1109163706.118457.53720@z14g2000cwz.googlegroups.com>
	<mailman.2977.1109182909.22381.python-list@python.org>
Message-ID: <1109208924.563510.212500@f14g2000cwb.googlegroups.com>

Michael Spencer wrote:
> janeaustine50 at hotmail.com wrote:
> > Kent Johnson wrote:
> >
> >>janeaustine50 at hotmail.com wrote:
> >>
> >>>p.s. the reason I'm not sticking to reversed or even reverse :
> >
> > suppose
> >
> >>>the size of the list is huge.
> >>
> >>reversed() returns an iterator so list size shouldn't be an issue.
> >>
> >>What problem are you actually trying to solve?
> >>
> >>Kent
> >>
> >
> >
> > Oh, you are right.
> >
> > Actually, it's more complicated than simple reversion. The list
order
> > should be somewhat "twisted" and the list is big.
> >
> > For example,
> >
> > [1,2,3,4,5,6,7,8,9,10]
> >
> > --> [10,9,8,7,6,1,2,3,4,5]
> >
> > so __getitem__(self,i) => __getitem__(self,-i-1) if i<len(size)/2,
> > otherwise __getitem__(self,i-len(size)/2)
> >
> > I'd like to have TwistedList class that takes in an original list
and
> > pretends as if it is twisted actually. However, I have to have
> > duplicate codes here and there to make it act like a "list", say
assert
> > twisted_list == [10,9,...] and for each in twisted_list and etc.
> >
> If you want a twisted 'view' of an existing list, then a wrapper
makes most sense.
>
> If, however, you only need the twisted version, why not simply
override
> list.__init__ (and extend, append etc... as required):
>
>   >>> class rev_list(list):
>   ... 	def __init__(self, iterable):
>   ... 		list.__init__(self, iterable[::-1])
>   ...
>   >>> l = rev_list([1,2,3])
>   >>> l
>   [3, 2, 1]
>
> Michael

Thank you but your advice doesn't fit in my case since I want to keep
the memory usage and the initial time minimum. iterable[::-1] would
build another list and it would take big memory and time during
reversing if iterable were huge. (and the "iterable" wouldn't be
garbage-collected because I want to keep a reference to it)



From removethis.kartic.krishnamurthy at gmail.com  Wed Feb  2 22:06:41 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Thu, 03 Feb 2005 03:06:41 GMT
Subject: Finding user's home dir
In-Reply-To: <5i9rtc.rq31.ln@orion.homeinvalid>
References: <5i9rtc.rq31.ln@orion.homeinvalid>
Message-ID: <5zgMd.22089$MX2.5133@twister.nyroc.rr.com>

Nemesis said the following on 2/2/2005 2:26 PM:
> Hi all, I'm trying to write a multiplatform function that tries to
> 
> def getHomeDir():
>     ''' Try to find user's home directory, otherwise return current directory.'''
> 
> Please, could you test it on your systems and tell me what you got?
> I'd like to know what it returns on different operating systems because
> I'm developing a multiplatform software.
> 
> Thank you all.


Neat!

Works fine on Freebsd 5.3, Python 2.4

Thanks,
-Kartic


From deetsNOSPAM at web.de  Mon Feb 21 12:09:32 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 21 Feb 2005 18:09:32 +0100
Subject: Unittest - testing properties (read-only attributes)
References: <uu0o5c0br.fsf@yahoo.co.uk>
Message-ID: <37uis9F5h48svU1@individual.net>

Paul Moore wrote:

> I have a class with a read-only attribute, and I want to add a unit
> test to ensure that it really *is* read-only. I can do this as
> 
>     def test_readonly(self):
> """Value and multiplier must be readonly"""
> try:
> self.combat.value = 1
> self.fail("Value is not read only")
> except AttributeError:
> pass
> 
> That works, but it seems a bit clumsy. Is there a better way?


By using setattr, you could refactor the above code into a function. Looks
like this (untested):

def test_readonly(self, instance, attribute, value=1):
 """Value and multiplier must be readonly"""
 try:
    setattr(instance, attribute, value)
    self.fail("Value is not read only")
 except AttributeError:
    pass


Then the testing becomes one line:

self.test_readonly(self.combat, "value")


-- 
Regards,

Diez B. Roggisch


From tbunce at mac.com  Tue Feb  1 15:05:53 2005
From: tbunce at mac.com (Thomas Bunce)
Date: Tue, 01 Feb 2005 12:05:53 -0800
Subject: How do you do arrays
References: <tbunce-0102051052450001@192.168.1.12>
Message-ID: <tbunce-0102051205530001@192.168.1.12>

Thanks all

      Tom


From donn at u.washington.edu  Mon Feb  7 12:40:01 2005
From: donn at u.washington.edu (Donn Cave)
Date: Mon, 07 Feb 2005 09:40:01 -0800
Subject: Memory Allocation?
References: <8GCNd.9880$ya6.9761@trndny01>
Message-ID: <donn-0E17FC.09400107022005@gnus01.u.washington.edu>

In article <8GCNd.9880$ya6.9761 at trndny01>,
 "Chris S." <chrisks at NOSPAM.udel.edu> wrote:

> Is it possible to determine how much memory is allocated by an arbitrary 
> Python object? There doesn't seem to be anything in the docs about this, 
> but considering that Python manages memory allocation, why would such a 
> module be more difficult to design than say, the GC?

Sorry, I didn't follow that - such a module as what?

Along with the kind of complicated internal implementation
details, you may need to consider the possibility that the
platform malloc() may reserve more than the allocated amount,
for its own bookkeeping but also for alignment.  It isn't
a reliable guide by any means, but something like this might
be at least entertaining -

   >>> 
   >>> class A:
   ...     def __init__(self, a):
   ...             self.a = a
   ... 
   >>> d = map(id, map(A, [0]*32))
   >>> d.sort()
   >>> k = 0
   >>> for i in d:
   ...     print i - k
   ...     k = i
   ... 

This depends on the fact that id(a) returns a's storage
address.

I get very different results from one platform to another,
and I'm not sure what they mean, but at a guess, I think
you will see a fairly small number, like 40 or 48, that
represents the immediate allocation for the object, and
then a lot of intervals three or four times larger that
represent all the memory allocated in the course of creating
it.  It isn't clear that this is all still allocated -
malloc() doesn't necessarily reuse a freed block right
away, and in fact the most interesting thing about this
experiment is how different this part looks on different
platforms.  Of course we're still a bit in the dark as
to how much memory is really allocated for overhead.

   Donn Cave, donn at u.washington.edu


From gb at cs.unc.edu  Sat Feb  5 20:48:01 2005
From: gb at cs.unc.edu (Gary Bishop)
Date: 5 Feb 2005 20:48:01 -0500
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot> <opsln54fpwej1m1c@ashot>
	<36hculF51ho2sU1@individual.net>
	<1107530489.308497.103530@g14g2000cwa.googlegroups.com>
	<36hrjpF4ui8fbU1@individual.net>
	<mailman.1911.1107546744.22381.python-list@python.org>
	<36i84qF52ce29U1@individual.net> <opslo127s7ej1m1c@ashot>
	<cu0umf$cja$1@sea.gmane.org>
	<mailman.1936.1107561113.22381.python-list@python.org>
	<opslo7jfhqej1m1c@ashot> <36l1dgF52b9d6U1@individual.net>
	<4205605f_2@news.unc.edu>
Message-ID: <42057751_1@news.unc.edu>

On SourceForge you will find release 1.12 of my Python readline
module. If you don't want to hack the colors, there is no reason to
upgrade from 1.11 to 1.12. They *should* work the same.

But if you'd like to hack the iPython colors this new version makes it
possible.  In your ipythonrc file add a line like:

execfile hackcolors.py

Now in hackcolors.py you can change colors and backgrounds like this:

####hackcolors.py####
import readline

# reach deep into the bowels of readline to get the color table
escape_to_color = readline.rl.console.escape_to_color

# change a color
escape_to_color['0;32'] = 0x72

del escape_to_color
del readline

#################

The two hex digits are the background and foreground color
respectively. In the example above I'm setting the color to green on a
grey background. Here is the table that is normally used to translate
colors.

  escape_to_color = { '0;30': 0x0,             #black
                      '0;31': 0x4,             #red
                      '0;32': 0x2,             #green
                      '0;33': 0x4+0x2,         #brown?
                      '0;34': 0x1,             #blue
                      '0;35': 0x1+0x4,         #purple
                      '0;36': 0x2+0x4,         #cyan
                      '0;37': 0x1+0x2+0x4,     #grey
                      '1;30': 0x1+0x2+0x4,     #dark gray
                      '1;31': 0x4+0x8,         #red
                      '1;32': 0x2+0x8,         #light green
                      '1;33': 0x4+0x2+0x8,     #yellow
                      '1;34': 0x1+0x8,         #light blue
                      '1;35': 0x1+0x4+0x8,     #light purple
                      '1;36': 0x1+0x2+0x8,     #light cyan
                      '1;37': 0x1+0x2+0x4+0x8, #white
                      '0': None,
                      }

An interested party should be able to arbitrarily map colors and their
backgrounds.

Enjoy,
gb



From bvande at po-box.mcgill.ca  Mon Feb  7 20:36:15 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Mon, 07 Feb 2005 20:36:15 -0500
Subject: variable declaration
In-Reply-To: <UmSNd.104914$Jk5.59261@lakeread01>
References: <1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4207fd24@fidonet.org>
	<UmSNd.104914$Jk5.59261@lakeread01>
Message-ID: <4208178F.40804@po-box.mcgill.ca>

Steve Holden said unto the world upon 2005-02-07 17:51:
> Alexander Zatvornitskiy wrote:
> 
>> ?????? Alex!
>>
>> 05 ??????? 2005 ? 17:00, Alex Martelli ? ????? ?????? ? All ?????:

<SNIP>

>>  AM> to all intents and purposes working "as if"
>>  AM> it was a declaration.  If I had to vote about the one worst formal
>>  AM> defect of Python, it would surely be 'global'.
>> Second worsest - 'def'? :)
>>
> The reason global is a wart can clearly be seen in the following example:
> 
>  >>> x = 3
>  >>> def f(tf, v):
>  ...   if tf:
>  ...     global x
>  ...   x = v
>  ...
>  >>> f(0, 5)
>  >>> x
> 5
>  >>>
> 
> This makes it apparent that the global statement is *not* executable, 
> the only one in the language that is not.

<SNIP>

> regards
>  Steve

Hi,

Steve's example makes my brain hurt. :-)

I'd appreciate it if someone could tell me if I am understanding the 
example correctly. (My grasp of the terminology and issues at play is 
a bit shaky.)

Let me simplify Steve's example to:

.def hurts_my_brain(v):
.    if False:     # unlike Steve's eg, ensuring that the
.        global x  # nested block is never hit at runtime
.    x = v

(I checked, and it works the same as the original eg, modulo change of 
function name.)

Is the right way to understand it in this vicinity:

At compile time (by which I mean when the Python bytecode is built) 
the global statement is hit and has the effect of `bumping up' the 
function local name `x' to the module namespace, making the function 
local name `x' synonymous with the module global name `x'. At runtime, 
the `global x' is never reached, but it has already, at compile time, 
had its effect on the nature of the function object hurts_my_brain. 
Further, if the function had instead said 'if True:' the global 
statement would have been reached at runtime, but would have been 
without effect due to this, having already been `used up' in the 
creation of the bytecode.


Can it then be further (truly :-) ) said that

if False:
     # thousands of lines of code here

would effect the structure of the function object's bytecode, but not 
its behaviour when run? Or, at most, would cause a performance effect 
due to the bytecode being bloated by thousands of line's worth of code 
that would never get executed?

Thanks for any confirmation of my understanding / rectification of 
same. Best,

Brian vdB


From ods at strana.ru  Sat Feb 12 03:49:41 2005
From: ods at strana.ru (Denis S. Otkidach)
Date: Sat, 12 Feb 2005 11:49:41 +0300
Subject: sre is broken in SuSE 9.2
In-Reply-To: <cukfdn$ttq$1@sea.gmane.org>
References: <mailman.2299.1108029731.22381.python-list@python.org>
	<1108060527.378911.146240@o13g2000cwo.googlegroups.com>
	<420D4D9A.40201@v.loewis.de> <cuke1o$fo4$1@news.comcor-tv.ru>
	<cukfdn$ttq$1@sea.gmane.org>
Message-ID: <20050212114941.024f636b.ods@strana.ru>

On Sat, 12 Feb 2005 09:42:41 +0100
"Fredrik Lundh" <fredrik at pythonware.com> wrote:

> the relevant part for this thread is *locale-*.  if wctype depends on
> the locale, it cannot be used for generic build.  (custom interpreters
> are an- other thing, but they shouldn't be shipped as "python").

You are right.  But isalpha behavior looks strange for me anyway: why
cyrillic character '\u0430' is recognized as alpha one for de_DE locale,
but is not for C?

-- 
Denis S. Otkidach
http://www.python.ru/      [ru]


From drew at gremlinhosting.com  Thu Feb  3 08:20:58 2005
From: drew at gremlinhosting.com (Andrew James)
Date: Thu, 03 Feb 2005 13:20:58 +0000
Subject: ModPython: passing variables between handlers?
Message-ID: <4202253A.7050704@gremlinhosting.com>

Hi all,
I'm writing an application which runs within Apache and uses mod_python 
to provide basic authentication and return content to the user, 
something like:

import modpython
....
def handler():
   # main part of the application starts here
   ...

def authenhandler():
   ...
   # Store information about the user in an object
   u = new User(req.user, pass)

I'd like to be able to pass the u object somehow from authenhandler to 
handler in an elegant fashion, but without using global variables (as I 
understand it these persist for the life of the child process which will 
be more than one request, which is not what I want, and could be a 
security hole).

I suppose that I could use session variables, but since this part of my 
application provides a WebDAV server, basic authentication credentials 
are passed on each request (so I don't really want to have to look after 
keeping track of sessions when I don't have to). I would rather not 
modify all my existing classes to support an  extra parameter in their 
constructors.

What I'm really looking for is some sort of global dictionary like PHP's 
$REQUEST or $SESSION, which I can assign freely to during the life of 
the request *from anywhere in my application* and which gets cleaned up 
for me automatically afterwards. Does something like this exist in 
mod_python?

If the approach above isn't possible, what would your recommendations be 
for a solution to this issue?

Many thanks for your time,
Andrew James


From t-meyer at ihug.co.nz  Thu Feb 17 21:21:21 2005
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Fri, 18 Feb 2005 15:21:21 +1300
Subject: how can i randomly choose keys in dictionary
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E802108407@its-xchg4.massey.ac.nz>
Message-ID: <ECBA357DDED63B4995F5C1F5CBE5B1E801DAFEAD@its-xchg4.massey.ac.nz>

> Hi,there. How can I choose a key in dictionary randomly?
> 
> Say, random.choice() in lists,

A dictionary's keys() are a list, so you already have the answer:

>>> import random
>>> d = {'a': 1, 'b': 2, 'c': 3}
>>> random.choice(d.keys())

=Tony.Meyer



From deetsNOSPAM at web.de  Wed Feb  9 10:05:20 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 09 Feb 2005 16:05:20 +0100
Subject: Is email package thread safe? (fwd)
References: <mailman.2245.1107959519.22381.python-list@python.org>
Message-ID: <36un5fF568c6lU1@individual.net>

Usually, oo-style apis are thread-safe as long as each thread uses its own
objects. Shared global state is _very_ uncommon, and if it's most probably
documented.

-- 
Regards,

Diez B. Roggisch


From aahz at pythoncraft.com  Tue Feb  8 00:55:19 2005
From: aahz at pythoncraft.com (Aahz)
Date: 8 Feb 2005 00:55:19 -0500
Subject: Is Python as capable as Perl for sysadmin work?
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
Message-ID: <cu9k87$d80$1@panix2.panix.com>

In article <pan.2005.02.08.04.01.16.605059 at yahooz.com>,
John M. Gabriele <john_sips_teaz at yahooz.com> wrote:
>
>For sysadmin-related tasks, is Python as useful as Perl, or does it get
>clumsy when often dealing with the stuff admins deal with on a regular
>basis?
>
>At some point during some dingy job in the back boiler room of Unix,
>would you find yourself saying, "geez, I'd wish I started this with
>Perl -- Python just isn't cutting it." ?

Not likely.  I'm a programmer, not a sysadmin, but my company's too
small for a sysadmin, so I and the other two programmers get elected.
(For example, today most of my time was spent hunting down kernel
patches for Red Hat 7.3 -- long story.)

Anyway.  Have you ever noticed how shell scripts keep getting longer?
Ever notice how it gets harder to figure out what the heck any given
script's doing?  Well, that's where Python helps you out compared to
Perl.  Python can be a bit clumsier than Perl for dirt-simple tasks, but
you'll find that Python scales much better than Perl.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From caleb1 at telkomsa.net  Tue Feb  8 23:35:34 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Tue, 08 Feb 2005 23:35:34 -0500
Subject: variable declaration
References: <cu2l5t$cf9$01$1@news.t-online.com>
	<MSGID_2=3A5025=2F3.131_4208c092@fidonet.org>
Message-ID: <opslwxpkvs1js0xs@news.telkomsa.net>

Alexander

>   PowerOfGenerator=TakeFromSensor()
>   if PowerOfGenerator>xxx:
>     ....
>   RecalcPower(PowerOfGenerator)
>   PutToTheDatabase(PowerOfGenerator)
>   ....
> Here, python will not help you. The worst thing is that in such  
> calculations
> you often receive plausible results.

(I think PyChecker has come up before, but...) If you like, you could make  
a text-file index of all the variable names allowed in your program, and  
parse all the python code to ensure that only those variable names are  
used.  I believe this would
a) solve your problem
b) require less than a morning's work
c) not force everyone else to have to deal with variable declarations that  
will be only an annoyance 95% percent of the time.

Is there a specific reason you want this added to the *language* itself?

Thanks
Caleb


From petite.abeille at gmail.com  Thu Feb 10 17:27:29 2005
From: petite.abeille at gmail.com (PA)
Date: Thu, 10 Feb 2005 23:27:29 +0100
Subject: XDR? (was Re: is there a safe marshaler?)
In-Reply-To: <420bd83e$0$28990$e4fe514c@news.xs4all.nl>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>	<mailman.2327.1108055983.22381.python-list@python.org>	<420bd06f$0$28991$e4fe514c@news.xs4all.nl>
	<mailman.2344.1108071535.22381.python-list@python.org>
	<420bd83e$0$28990$e4fe514c@news.xs4all.nl>
Message-ID: <2a9be4eea58e5b4b31afb58f22f5520a@gmail.com>


On Feb 10, 2005, at 22:55, Irmen de Jong wrote:

> Perhaps, but the spec makes my skin crawl.

Perhaps I could interest you in JSON then:

"It is easy for humans to read and write. It is easy for machines to 
parse and generate. "

http://www.crockford.com/JSON/index.html

Cheers

--
PA, Onnay Equitursay
http://alt.textdrive.com/



From mauro.cicognini at gmail.com  Fri Feb 11 08:16:18 2005
From: mauro.cicognini at gmail.com (Mauro Cicognini)
Date: 11 Feb 2005 05:16:18 -0800
Subject: Python versus Perl ?
In-Reply-To: <1grl63x.1f2tzwz1q984vpN%aleaxit@yahoo.com>
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
	<slrnd0cofg.rr5.jgrahn-nntq@frailea.sa.invalid>
	<1107726328.158314.265680@o13g2000cwo.googlegroups.com>
	<mailman.2038.1107727355.22381.python-list@python.org>
	<1grl63x.1f2tzwz1q984vpN%aleaxit@yahoo.com>
Message-ID: <1108127778.811259.152240@g14g2000cwa.googlegroups.com>


Alex Martelli wrote:

> URK -- _my_ feeling is that we have entirely *too many* options for
> stuff like web application frameworks, GUI toolkits, XML processing,
...
>
>
> Alex

I entirely second that.

More, I'd heartily welcome an authoritative word on which to focus on
for each category... I hate to see scarce resources wasted.

Mauro



From gsakkis at rutgers.edu  Wed Feb  9 10:21:07 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: Wed, 9 Feb 2005 10:21:07 -0500
Subject: Name of type of object
References: <4209A52C.A1C40311@yahoo.com> <bEiOd.83727$Tf5.12604@lakeread03>
	<J8adnUGW461nV5TfRVn-rA@comcast.com>
Message-ID: <36uo36F54okd6U1@individual.net>


"Steven Bethard" <steven.bethard at gmail.com> wrote in message
news:J8adnUGW461nV5TfRVn-rA at comcast.com...
> Randall Smith wrote:
> > Jive Dadson wrote:
> >
> >> The traceback routine prints out stuff like,
> >>
> >>     NameError: global name 'foo' is not defined
> >>
> >> NameError is a standard exception type.
> >>
> >> What if I want to print out something like that?
> >> I've determined that "global name 'foo' is not defined" comes from the
> >> __str__ member of the exception object.
> >> Where does it find the string "NameError"?  In general, if I have an
> >> object, is there a way to obtain the name of the type of the object?
> >>
> >> Thankee.
> >
> > type(object) ?
>
> Doesn't work for old-style classes like exceptions:
>
> py> e = NameError("global name 'foo' is not defined")
> py> type(e)
> <type 'instance'>
> py> type(e).__name__
> 'instance'
>
> For old-style classes, you'll need to go through __class__
>
> py> e.__class__
> <class exceptions.NameError at 0x00934900>
> py> e.__class__.__name__
> 'NameError'
>
> STeVe

To sum up:

def typename(obj):
    try:
        return obj.__class__.__name__
    except AttributeError:
        return type(obj).__name__


George




From steven.bethard at gmail.com  Mon Feb 28 19:00:39 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 28 Feb 2005 17:00:39 -0700
Subject: Why do descriptors (and thus properties) only work on
	attributes.
In-Reply-To: <slrnd25nve.d87.apardon@rcpc42.vub.ac.be>
References: <slrnd25nve.d87.apardon@rcpc42.vub.ac.be>
Message-ID: <-rOdnTNBm-08Lb7fRVn-vQ@comcast.com>

Antoon Pardon wrote:
> Can anyone explain why descriptors only work when they are an attribute
> to an object or class.  I think a lot of interesting things one can
> do with descriptors would be just as interesting if the object stood
> on itself instead of being an attribute to an other object.

Not sure what "stood on itself" really means, but if you just want to be 
able to have module-level properties, you can do something like:

py> class Module(object):
...     oldimporter = __builtins__.__import__
...     def __init__(self, *args):
...         mod = self.oldimporter(*args)
...         self.__dict__ = mod.__dict__
...     p = property(lambda self: 42)
...
py> __builtins__.__import__ = Module
py> import __main__
py> __main__.p
42
py> __main__.p = 3
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
AttributeError: can't set attribute

where you replace module objects with a different object.  Note that 
this is also nasty since properties reside in the class, so all modules 
now share the same properties:

py> import sys
py> sys.p
42
py> sys.p = 13
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
AttributeError: can't set attribute

STeVe


From rkern at ucsd.edu  Fri Feb 11 04:57:57 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Fri, 11 Feb 2005 01:57:57 -0800
Subject: [N00B] What's %?
In-Reply-To: <614c778e.0502110154.4d53d97a@posting.google.com>
References: <614c778e.0502100938.6665cb52@posting.google.com>
	<614c778e.0502110154.4d53d97a@posting.google.com>
Message-ID: <cuhvj5$88b$1@news1.ucsd.edu>

administrata wrote:

> sry, i don't know much about maths
> 
> What is % used for?
> 
> such as?

Among many other things, you can use it to test whether one integer 
evenly divides another integer.

For example, to test if a number is odd:

def isodd(x):
     return bool(x % 2)

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From kartic.krishnamurthy at gmail.com  Mon Feb 28 14:41:47 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 28 Feb 2005 11:41:47 -0800
Subject: cannot open file in write mode, no such file or directory
In-Reply-To: <1109618906.347448.218700@o13g2000cwo.googlegroups.com>
References: <1109618906.347448.218700@o13g2000cwo.googlegroups.com>
Message-ID: <1109619707.033450.227120@f14g2000cwb.googlegroups.com>

> I'm having a problem where when trying to open a file in write mode,
I
> get an IOError stating no such file or directory.  I'm calling an
> external program which takes an input file and produces an output
file
> repeatedly, simulating the input file separately for each replicate.
> The error occurs when trying to open the input file to write out the
> new data.  The problem is difficult to reproduce since it only shows
up
> once every few thousand replicates.  I've tried using both os.system

I am afraid you need to give more information that just IOError,
calling an external program.

Please post the exact message including the input filename at the time
the program went down. If you don't print the filename, please modify
your program to do so.

A shot in the dark solution to your problem might be that you are
dynamically  generating a filename and that filename probably contains
characters not allowed by the local file system OR you generate a path
that does not exist. For open() to work with the 'w' flag, the path
where the file you say should be created should exist.

Thanks,
-Kartic



From behnel_ml at gkec.informatik.tu-darmstadt.de  Wed Feb  9 06:50:02 2005
From: behnel_ml at gkec.informatik.tu-darmstadt.de (Stefan Behnel)
Date: Wed, 09 Feb 2005 12:50:02 +0100
Subject: What's wrong with `is not None`?
In-Reply-To: <mailman.2219.1107903975.22381.python-list@python.org>
References: <mailman.2219.1107903975.22381.python-list@python.org>
Message-ID: <cuctda$c5k$1@lnx107.hrz.tu-darmstadt.de>


Frans Englich schrieb:
> What is the equivalent expression which is more secure; `!= None`?

Note that this is not necessarily equivalent. '!=' and '==' possibly run
method calls on objects which can be costly depending on their
implementation and can even raise exceptions if called with None. If I
want to check for None, I always do it with "is". It's a constant after all...

Stefan


From nospam at nospam.fr  Fri Feb 11 03:14:16 2005
From: nospam at nospam.fr (jean-michel)
Date: Fri, 11 Feb 2005 09:14:16 +0100
Subject: goto, cls, wait  commands
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
Message-ID: <cuhpa6$oou$1@news.tiscali.fr>

"BOOGIEMAN" <BOOGIEMANPN at YAHOO.COM> a ?crit dans le message de
news:1ixbe7q69lob3.1npuu3z54gx8z.dlg at 40tude.net...
> I've just finished reading Python turtorial for non-programmers
> and I haven't found there anything about some usefull commands I used in
> QBasic. First of all, what's Python command equivalent to QBasic's "goto"
?
> Secondly, how do I clear screen (cls) from text and other content ?
> And last, how do I put program to wait certain amount of seconds ?
> If I remeber correctly I used to type "Wait 10" and QBasic waits
> 10 seconds before proceeding to next command.

Hi all,
I saw a lot of comments saying GOTO is not usefull, very bad, and we
should'nt use it because we don't need it.
I think that's true, but only if you *create* programs.
But if the goal is to provide some kind of converter to automatically take
an old application written with an old language (using GOTO), and generating
python code, it would certainly a great help to have this (unclean) feature
in native python.
Best regards
jm




From steve at holdenweb.com  Sat Feb  5 08:15:18 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 05 Feb 2005 08:15:18 -0500
Subject: sos!
In-Reply-To: <6d2e4eef.0502050342.d8744cb@posting.google.com>
References: <6d2e4eef.0502050342.d8744cb@posting.google.com>
Message-ID: <XK3Nd.103627$Jk5.2666@lakeread01>

jordan2856977 wrote:

> hellow everybody! I'm from china. I'm a beginner of python. in china,
> python is not a fashionable language, so it's difficult to find some
> books about python. finally,I find a book named "python how to
> program" wrote by H.M.Deitel . who can tell me where can I find some
> interesting source code about python. otherwise, I will fell boring
> about study!

Start at the links you find on

   http://www.python.org/moin/BeginnersGuide

and take it from there. Also, if you want to see actual code there's 
lots of it in the standard library. If that's all too useful, take a look at

   http://www.uselesspython.com/

Welcome to Python!

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From fuzzyman at gmail.com  Fri Feb 25 07:57:41 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 25 Feb 2005 04:57:41 -0800
Subject: Trees
In-Reply-To: <mailman.3035.1109311254.22381.python-list@python.org>
References: <mailman.3035.1109311254.22381.python-list@python.org>
Message-ID: <1109336261.108782.131850@o13g2000cwo.googlegroups.com>


Alex Le Dain wrote:
> Is there a generic "tree" module that can enable me to sort and use
> trees (and nodes). Basically having methods such as .AddNode(),
> .GetAllChildren(), .FindNode() etc.
>
> Is this handled natively with any of the core modules?
>
> cheers, Alex.
>
> --
> Poseidon Scientific Instruments Pty Ltd
> 1/95 Queen Victoria St
> FREMANTLE  WA, AUSTRALIA
>
> Ph: +61 8 9430 6639     Fx: +61 8 9335 4650
> Website:  www.psi.com.au
>
> PSI, an ISO-9001 Company
>
> CONFIDENTIALITY: The contents of this email (and any attachments) are

> confidential and may contain proprietary and/or copyright material of

> Poseidon Scientific Instruments Pty Ltd (PSI) or third parties. You
may
> only reproduce or distribute the material if you are expressly
> authorised to do so. If you are not the intended recipient, any use,
> disclosure or copying of this email (and any attachments) is
> unauthorised. If you have received this email in error, please
> immediately delete it and any copies of it from your system and
notify
> PSI by return email to sender or by telephone on +61 (08) 9430 6639.
>
> DISCLAIMER: You may only rely on electronically transmitted documents
when:
> (a)     those documents are confirmed by original documents signed by
an
> authorised employee of PSI; and/or
> (b)     the document has been confirmed and checked against a hard
copy
> of that document provided by PSI.
>
> VIRUSES: PSI does not represent or warrant that files attached to
this
> e-mail are free from computer viruses or other defects. Any attached
> files are provided, and may only be used, on the basis that the user
> assumes all responsibility for any loss or damage resulting directly
or
> indirectly from such use. PSI's liability is limited in any event to
> either the re-supply of the attached files or the cost of having the
> attached files re-supplied.

Long sig !! :-)

Try elemtree by the F-bot....

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From tom at dtsam.com  Tue Feb  1 10:13:36 2005
From: tom at dtsam.com (Thomas Bartkus)
Date: Tue, 1 Feb 2005 09:13:36 -0600
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<uImdnUAKxbKaFWPcRVn-2A@telcove.net>
	<1107205410.367521.50490@f14g2000cwb.googlegroups.com>
Message-ID: <44SdnUZGopnrAWLcRVn-pg@telcove.net>


"Carl Banks" <invalidemail at aerojockey.com> wrote in message
news:1107205410.367521.50490 at f14g2000cwb.googlegroups.com...
<snip>

> How common is it for a local variable to be bound in
> more than one place within a function?

How common?  It shouldn't happen at all and that was the point.
The original posters code demonstrates how it can occur inadvertently as a
result of a simple typographical error.

You won't hear me claim that Python is without mitigating virtues. Clearly,
there is much about Python that encourages good design which will in turn
reduce the incidence of such errors. Nevertheless, one has to admit to this
blemish.  One also wonders if it is really necessary to endure what looks to
me like an omission.  Is there a reason why the interpreter
couldn't/shouldn't require formal declarations?

I, too, wish there were a switch like VBs "Option Explicit" that would
require you to declare "epsilon = 0" and thereafter have the interpretor
refuse assignment to an undeclared "epselon". Sane VB programmers (and yes,
there are a few!) leave it on by default and consider it abomination that
the switch is optional. The original posters example was a good one.  I had
to take a good long stare before I saw it even though the code is short,
sweet, and otherwise correct.

*Is* there a reason why the interpreter couldn't/shouldn't require formal
variable declaration?
It seems to me that lack of same may also be creating hellish barriers to
writing truly effective IDEs for Python.

Thomas Bartkus




From duncan.booth at invalid.invalid  Thu Feb  3 09:46:01 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 3 Feb 2005 14:46:01 GMT
Subject: Finding user's home dir
References: <5i9rtc.rq31.ln@orion.homeinvalid>
	<mailman.1800.1107419518.22381.python-list@python.org>
	<GcKdnaOlaN41tJ_fRVn-rg@powergate.ca>
Message-ID: <Xns95F2963559ABduncanrcpcouk@127.0.0.1>

Peter Hansen wrote:

> Nemesis, please use the above recipe instead, as it makes
> the more reasonable (IMHO) choice of checking for a HOME
> environment variable before trying the expanduser("~")
> approach.  This covers folks like me who, though stuck
> using Windows, despise the ridiculous Microsoft convention
> of "user folders" named like "C:\Documents and Settings\Peter"
> and prefer to create sensible folder like c:\users\peter
> and set a HOME variable to point to it.  Your approach
> ignores our HOME variable.

You could just tell Windows to move your home directory location to 
c:\users\peter and then all the environment variables will be set for you 
automatically.

It probably varies wildly between Windows versions, but to assign a home 
folder for a local user on XP go to Control Panel/Administrative 
Tools/Computer Management/Local Users and Groups/Users, select your 
account, right menu Properties, Profile tab, and edit the 'Home folder' 
setting. Press F1 while editing the home folder location and see that at 
least someone at Microsoft thinks c:\users\... is a sensible location.

See also http://support.microsoft.com/?kbid=816313 for domain users etc.


From zanesdad at bellsouth.net  Tue Feb  8 09:57:08 2005
From: zanesdad at bellsouth.net (Jeremy Jones)
Date: Tue, 08 Feb 2005 09:57:08 -0500
Subject: Loop in list.
In-Reply-To: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
References: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
Message-ID: <4208D344.3090402@bellsouth.net>

Jim wrote:

>Where did this type of structure come from:
>
>mat = ['a' for i in range(3)]    ?
>
>This will produce a list of three elements but
>I don't see reference for it in any of the books.
>
>  
>
It's called a list comprehension and it appeared in Python 2.0.

http://www.amk.ca/python/2.0/index.html#SECTION000600000000000000000



Jeremy Jones


From max at alcyone.com  Sun Feb 20 20:24:49 2005
From: max at alcyone.com (Erik Max Francis)
Date: Sun, 20 Feb 2005 17:24:49 -0800
Subject: Tuple index
In-Reply-To: <IrSdncAaerNlq4TfRVn-hw@comcast.com>
References: <cvbcc6$b5f$1@news.netins.net> <IrSdncAaerNlq4TfRVn-hw@comcast.com>
Message-ID: <e6qdnfQgJZn_pYTfRVn-oQ@speakeasy.net>

Larry Bates wrote:

> Tuples don't have all the nice methods that lists have
> so convert it to a list.
> 
> tuple=('a','b','c','d')
> l=list(tuple)
> 
> now you can do:
> 
> list.index('c')
> 
> which returns 2
> 
> Remember index returns -1 when nothing is found.

No, that's .find in strings that returns -1.  .index in lists raises a 
ValueError:

 >>> [1, 2, 3].index(4)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
ValueError: list.index(x): x not in list

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   The map is not the territory.
   -- Alfred Korzybski


From fredrik at pythonware.com  Mon Feb 14 17:21:25 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 23:21:25 +0100
Subject: array of bits?
References: <cur7k9$4g7$1@lust.ihug.co.nz>
Message-ID: <cur842$fjv$1@sea.gmane.org>

"MM" wrote:

> What is the best structure/way to create an array of bits (actually true/false flags) of an 
> arbitrary length ranging from about 20 upto about 500. Speed of access more of an issue than 
> compactness.
>
> eg:
> [0] 0
> [1] 0
> [2] 1
> [3] 0
> [4] 1
> ...
> [n] 0
> etc.

if you need a list of flags, use a list of flags:

    [False] * 500

(compared to a bit array, you'll waste a whopping 31 bits per flag, but
unless you plan to use tens of thousands of lists, that shouldn't be much
of a problem)

</F> 





From irmen.NOSPAM at xs4all.nl  Thu Feb 10 16:21:51 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Thu, 10 Feb 2005 22:21:51 +0100
Subject: XDR? (was Re: is there a safe marshaler?)
In-Reply-To: <mailman.2327.1108055983.22381.python-list@python.org>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<mailman.2327.1108055983.22381.python-list@python.org>
Message-ID: <420bd06f$0$28991$e4fe514c@news.xs4all.nl>

PA wrote:
> 
> On Feb 10, 2005, at 15:01, Irmen de Jong wrote:
> 
>> Is xdrlib the only option?
>> I would expect that it is fast and safe because
>> it (the xdr spec) has been around for so long.
> 
> 
> XDR? Like Sun's "XDR: External Data Representation standard"?
> 
> http://www.faqs.org/rfcs/rfc1014.html
> http://www.faqs.org/rfcs/rfc1832.html

Not "like", but "the".
Or at least, a subset. (the xdrlib module documentation says
"It supports most of the data types described in the RFC").


> How does XDR copes with Unicode these days?

Not directly, it seems that you have to encode
your unicode strings yourself first .


> Alternatively, perhaps there is a ASN.1 DER library in python?
> 
> http://asn1.elibel.tm.fr/en/standards/index.htm


I don't know. Is there?


PS the xdr format is not self-describing in the way that
marshal and pickle streams are. That is a big limitiation
for what I need it for so xdr seems to drop off my radar.
Is an ASN.1 stream self-describing?

--Irmen


From rnd at onego.ru  Wed Feb  9 09:34:07 2005
From: rnd at onego.ru (Roman Suzi)
Date: Wed, 9 Feb 2005 17:34:07 +0300 (MSK)
Subject: Is email package thread safe? (fwd)
Message-ID: <Pine.LNX.4.62.0502091731140.14463@rnd.onego.ru>


(this is a repost with an addition - probably noone noticed my message first 
time)

Hi!

Just to be sure, is email package of Python 2.3 thread-safe or not
(to use, for example, in python-milter?)

P.S. And where can I find information on particular piece of standard library
if it is thread-safe or need locking? I recall 'random' module is (was?)
unsafe - which isexplicitly stated in the docs. Can I assume that everything 
else without such notice is thread-safe?

Sincerely yours,
Roman A.Souzi

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


From jlargentaye at gmail.com  Tue Feb  8 07:27:21 2005
From: jlargentaye at gmail.com (Jean  de Largentaye)
Date: 8 Feb 2005 04:27:21 -0800
Subject: Choosing the right parser for parsing C headers
In-Reply-To: <mailman.2161.1107861785.22381.python-list@python.org>
References: <1107861023.254610.14310@g14g2000cwa.googlegroups.com>
	<mailman.2161.1107861785.22381.python-list@python.org>
Message-ID: <1107865641.937691.282930@g14g2000cwa.googlegroups.com>

GCC-XML looks like a very interesting alternative, as Python includes
tools to parse XML.
The mini-C compiler looks like a step in the right direction for me.
I'm going to look into that.
I'm not comfortable with C++ yet, and am not sure how I'd use Pyste.

Thanks for the information guys, you've been quite helpful!

John



From fredrik at pythonware.com  Wed Feb 16 14:17:14 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 16 Feb 2005 20:17:14 +0100
Subject: Imported or executed?
References: <slrnd17668.3nr.schulz@sunbroy2.informatik.tu-muenchen.de>
Message-ID: <cv0625$lpd$1@sea.gmane.org>

Stephan Schulz wrote:

> Is there a (portable, standard) way for the program/module to find out
> if it is imported or executed stand-alone?

if a module is executed, it's name is set to "__main__".  see:

http://www.python.org/doc/faq/programming.html#how-do-i-find-the-current-module-name

</F> 





From friedmud at gmail.com  Mon Feb 14 18:14:12 2005
From: friedmud at gmail.com (friedmud at gmail.com)
Date: 14 Feb 2005 15:14:12 -0800
Subject: Inheritance error in python 2.3.4???
Message-ID: <1108422852.332215.165790@o13g2000cwo.googlegroups.com>

In trying to construct a good object model in a recent project of mine,
I ran across the following peculiarity in python 2.3.4 (haven't tried
any newer versions):

Say you have a base class that has an attribute and an accessor
function for that attribute (just a simple get).  Then you inherit that
base class to make a sub class and the subclass contains a "set"
function on that same attribute.  If you call the set function and give
it a value and then call the get function......... it doesn't do what
you would expect.... instead of returning the value that was "set" it
instead returns the default value of the variable in the base class!!!

BUT!  If you implement the get function in the derived class it works
fine....

This, to me, is completely wrong.

I have worked up the following example to illustrate my point:

First is the way I want to do it:
######################################
bash-2.05b$ cat main.py
class baseClass(object):
        __Something = "Dumb!"

        def getSomething( self ):
                return self.__Something

class subClass(baseClass):
        def setSomething( self , aSomething ):
                self.__Something = aSomething


anObject = subClass()
anObject.setSomething("Cool!")
print anObject.getSomething()

bash-2.05b$ python main.py
Dumb!
###################################

Note that it prints "Dumb!" instead of "Cool!".

Now if I re-implement getSomething in the subclass it does this:
####################################
bash-2.05b$ cat main.py
class baseClass(object):
        __Something = "Dumb!"

        def getSomething( self ):
                return self.__Something

class subClass(baseClass):
        def setSomething( self , aSomething ):
                self.__Something = aSomething

        def getSomething( self ):
                return self.__Something


anObject = subClass()
anObject.setSomething("Cool!")
print anObject.getSomething()

bash-2.05b$ python main.py
Cool!
#######################################

Note that it now prints "Cool!" like it was supposed to in the first
place...

Hello?  Am I just being retarded?  To me the call to self.__Something =
aSomething should change THE ONLY instance of __Something to "Cool!".
Calling an inherited function shouldn't create a new instance of
__Something (which is what it has to be doing) and return that instead.

This is really going to cripple my object model if I have to
reimplement each one of these functions everytime!  The whole point was
to have a stable "implementation base" that captures a lot of the
common functionality between the different inherited classes... and
provides a "one stop shop" for modifying a lot of the behavior.  Also I
would have a lot less code because I would inherit functionality.

FYI - I am coming from a C++ background... where I do this kind of
thing often.

Someone please show me the pythonish way to do this!

Thanks!
Friedmud



From duncan.booth at invalid.invalid  Tue Feb 22 11:12:12 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 22 Feb 2005 16:12:12 GMT
Subject: Problem with the sort() function
References: <64827323f7134aea810788b3ec6cf516@localhost.talkaboutprogramming.com>
	<mailman.2928.1109066131.22381.python-list@python.org>
	<421b4e54@nntp0.pdx.net>
Message-ID: <Xns9605A4CC3DC23duncanrcpcouk@127.0.0.1>

Scott David Daniels wrote:

>      if sys.version_info < (2, 4):
>          def sorted(iterable, cmp=None, key=None, reverse=False):
>              "return a sorted copy of its input"
>              seq = list(iterable)
>              if reverse:
>                  seq.reverse()        # preserve stability
>              if key is not None:
>                  seq = [(key(elem), i, elem) for i, elem
>                         in enumerate(seq)]
>                  seq.sort(cmp)
>              if key is not None:
>                  seq = [elem for (key, i, elem) in seq]
>              if reverse:
>                  seq.reverse()
>              return seq

I think you may have some unintended indentation on the 'seq.sort' line 
otherwise this only sorts when a key is specified.

Also, you probably want:

    if key is not None:
        if reverse:
           seq = [(key(elem), -i, elem) for i, elem
                in enumerate(seq)]
        else:
           seq = [(key(elem), i, elem) for i, elem
                in enumerate(seq)]

to handle the case where both key and reverse are given.


From tim.peters at gmail.com  Mon Feb 14 20:06:05 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Mon, 14 Feb 2005 20:06:05 -0500
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <curb3t$67k$3@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr> <curb3t$67k$3@usenet.otenet.gr>
Message-ID: <1f7befae05021417066ad2f799@mail.gmail.com>

[Ilias Lazaridis]
...
> Let's see:
>
> The process would be:
>
> a) A Python Foundation official states: "of course we accept diversity
> and of course we are intrested that our source-code-base compiles
> directly with MinGW (and other compilers)".

Well, I'm a Director of the Python Software Foundation, and my view is
"the more platforms the merrier".  But I'm not paid to work on Python,
and I don't have time to volunteer to help MinGW along, so I don't
anticipate that I'll do anything here beyond writing this reply.

I think you're mistaken about the role the PSF plays here.  For
example, the PSF does no development work on Python -- all work on
Python comes from volunteers, and the PSF can't tell anyone what to
do.  The PSF did start a grant program last year, and a proposal to
fund MinGW-for-Python development would certainly be considered.  But
that too requires that someone volunteer to write such a proposal, and
take their chances on getting a grant.  Those chances are,
unfortunately, not good, since even in the program's first year we got
proposals requesting funding vastly exceeding the US$40K we could
afford to spend.

That leaves volunteers, or a company that wants what you want enough
to pay for it on their own (which has happened, but not often -- I
don't think it's happened since Zope Corp funded development of the
datetime module).

> b) the pyMinGW developer states: "I am intrested that my patches are
> included within the main python source code base" [of course this
> contribution would deserve to be mentioned somewhere]
>
> c) One part of the Python Community states: "look those loosers, like to
> use MinGW toolkit - pah! I'll continue to use my super-optimizing, xx%
> faster results, less hassle Microsoft-Compiler"
>
> d) One part of the Python Community states: "I'm very happy that my
> toolset of choice gets official support, to which I can contribute as a
> community member"
>
> e) there is no point e. People start simply to cooperate, thus python's
> evolution is ensured.

Sorry, I didn't grasp the point of b thru e.

> ... 
> Good night to all.

Likewise!


From peter at engcorp.com  Sat Feb 26 21:52:06 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 26 Feb 2005 21:52:06 -0500
Subject: Thread scheduling
In-Reply-To: <mailman.3107.1109471319.22381.python-list@python.org>
References: <1109456481.214243.140670@l41g2000cwc.googlegroups.com>	<mailman.3100.1109457191.22381.python-list@python.org>	<09Kdndga9dgQkrzfRVn-hg@powergate.ca>	<mailman.3103.1109465231.22381.python-list@python.org>	<G_WdnU5rv57SsbzfRVn-vg@powergate.ca>
	<mailman.3107.1109471319.22381.python-list@python.org>
Message-ID: <TZCdnaZni9NIqLzfRVn-gA@powergate.ca>

Jack Orenstein wrote:
>> One thing you might try is experimenting with sys.setcheckinterval(),
>> just to see what effect it might have, if any.
> 
> That does seem to have an impact. At 0, the problem was completely
> reproducible. At 100, I couldn't get it to occur.

If you try other values in between, can you directly affect
the frequency of the failure?  That would appear to suggest
a race condition.

>> It's also possible there were some threading bugs in Py2.2 under
>> Linux.  Maybe you could repeat the test with a more recent
>> version and see if you get different behaviour.  (Not that that
>> proves anything conclusively, but at least it might be a good
>> solution for your immediate problem.)
> 
> 2.3 (on the same machine) does seem better, even with setcheckinterval(0).

The default check interval was changed from 10 in version 2.2
and earlier to 100 in version 2.3.  (See 
http://www.python.org/2.3/highlights.html for details.)

On the other hand, with version 2.3.4 under RH9, I tried values
of 10 and 1 with no failures at any time.  This might still
be an issue with your own particular system, so having others
try it out might be helpful...

-Peter


From sjmachin at lexicon.net  Fri Feb  4 06:52:58 2005
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 04 Feb 2005 22:52:58 +1100
Subject: Converting a string to a function pointer
References: <mailman.1875.1107514850.22381.python-list@python.org>
Message-ID: <bin601tnirsi4kaetmdhmbgmn8t4tnen8f@4ax.com>

On Fri, 04 Feb 2005 12:01:35 +0100, H?kan Persson <hakan at zyberit.com>
wrote:

>Hi.
>
>I am trying to "convert" a string into a function pointer.
>Suppose I have the following:
>
>from a import a
>from b import b
>from c import c
>
>funcString = GetFunctionAsString()
>
>and funcString is a string that contains either "a", "b" or "c".
>How can I simply call the correct function?
>I have tried using getattr() but I don't know what the first (object) 
>argument should be in this case.

Try this:

>>> from sys import exit
>>> globals()
{'__builtins__': <module '__builtin__' (built-in)>, '__name__':
'__main__', 'exit': <built-in function exit>, '__doc__': None}
>>> afunc = globals()["exit"]

Do you really need to use the "from X import Y" style? Consider the
following alternative:

>>> import sys
>>> afunc = getattr(sys, "exit")





From usenet_spam at janc.invalid  Mon Feb  7 18:28:30 2005
From: usenet_spam at janc.invalid (JanC)
Date: Mon, 07 Feb 2005 23:28:30 GMT
Subject: Possibly OT: Controlling winamp with Python
References: <JZOdnVLIY48-S57fRVn-hA@comcast.com>
	<1107548407.626431.171350@z14g2000cwz.googlegroups.com>
	<O-udnS69k4nmQZ7fRVn-hQ@comcast.com>
	<mailman.1918.1107549863.22381.python-list@python.org>
Message-ID: <Xns95F74D55688EJanC@213.118.79.171>

Bill Mill schreef:

> You could write the Python program as a proxy of the internet stream.
> Basically, you would point your proxy at the web stream and receive
> the data it sends. At the same time, you would be listening for
> connections on some socket on the local machine. You would then point
> winamp towards the local socket instead of the internet station.

Winamp buffers incoming streams, so that won't be very functional...   ;-)

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From reinhold-birkenfeld-nospam at wolke7.net  Sun Feb 20 08:41:48 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Sun, 20 Feb 2005 14:41:48 +0100
Subject: [perl-python] exercise: partition a list by equivalence
In-Reply-To: <37pb5jF5fnfivU1@individual.net>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<1108814276.680736.264380@l41g2000cwc.googlegroups.com>
	<37pb5jF5fnfivU1@individual.net>
Message-ID: <37ribcF5er80rU1@individual.net>

Reinhold Birkenfeld wrote:

> My solution (which may not be the fastest or most effective, but till
> now is the shortest <wink> and it works):
> 
> def merge(pairings):
>     sets = {}
>     for x1, x2 in pairings:
>         newset = (sets.get(x1, frozenset([x1]))
>                   | sets.get(x2, frozenset([x2])))
>         for i in newset:
>             sets[i] = newset
> 
>     return [list(aset) for aset in set(sets.itervalues())]

A recursive solution (around twice as fast as the above, though very
slow still...)

def merge_rb2(pairings):
    def merge(sets):
        res_sets = []
        for tset in sets:
            for item in tset:
                for rset in res_sets:
                    if item in rset:
                        rset.update(item for item in tset)
                        break
                else:
                    continue
                break
            else:
                res_sets.append(set(tset))
        if len(res_sets) == len(sets):
            return res_sets
        else:
            return merge(res_sets)

    return [list(s) for s in merge([set(pair) for pair in pairings])]

Another one:

def merge_rb3(pairings):
    dic = {}
    for x1, x2 in pairings:
        dic.setdefault(x1, []).append(x2)
        dic.setdefault(x2, []).append(x1)

    def red(k, l):
        l.append(k)
        sub = dic[k]
        for i in dic[k]:
            if i not in l:
                red(i, l)
        del dic[k]

    res = []
    while len(dic):
        rl = []
        red(iter(dic).next(), rl)
        res.append(rl)

    return res

Reinhold


From peter at engcorp.com  Sat Feb 26 12:25:00 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 26 Feb 2005 12:25:00 -0500
Subject: fdups: calling for beta testers
In-Reply-To: <422044b9$1@news.vo.lu>
References: <421f97eb$1@news.vo.lu>
	<1109380525.262724.275780@g14g2000cwa.googlegroups.com>
	<422044b9$1@news.vo.lu>
Message-ID: <AaidnagE7Yd2Lb3fRVn-qg@powergate.ca>

Patrick Useldinger wrote:
>> (9) Any good reason why the "executables" don't have ".py" extensions
>> on their names?
> 
> (9) Because I am lazy and Linux doesn't care. I suppose Windows does?

Unfortunately, yes.  Windows has nothing like the "x" permission
bit, so you have to have an actual extension on the filename and
Windows (XP anyway) will check it against the list of extensions
in the PATHEXT environment variable to determine if it should be
treated like an executable.

Otherwise you must type "python" and the full filename.

-Peter


From Peter.Vandersteegen at gmail.com  Wed Feb 16 17:05:05 2005
From: Peter.Vandersteegen at gmail.com (peter)
Date: 16 Feb 2005 14:05:05 -0800
Subject: adding new functionality to a function non-intrusively!
In-Reply-To: <mailman.2713.1108579364.22381.python-list@python.org>
References: <1108564620.657526.301320@g14g2000cwa.googlegroups.com>
	<1108566348.660335.224170@g14g2000cwa.googlegroups.com>
	<mailman.2713.1108579364.22381.python-list@python.org>
Message-ID: <1108591505.670637.258590@c13g2000cwb.googlegroups.com>

indeed it does,  so basically everything works except my original
solution:

def myfunction(a,b):
    return a+b

def _myfunction(a,b):
       return myfunction(a,b)
myfunction = _myfunction

oh well, it was enough to puzzle my tiny brain....



From williams13 at llnl.gov  Wed Feb  9 11:15:43 2005
From: williams13 at llnl.gov (Dean N. Williams)
Date: Wed, 09 Feb 2005 08:15:43 -0800
Subject: Building Python with Tcl/Tk on Cygwin_NT-5.1
In-Reply-To: <20050208175514.GA3788@tishler.net>
References: <41FF5A67.3090606@llnl.gov> <20050201125129.GA432@tishler.net>
	<41FFA7C9.4070308@llnl.gov> <20050202124435.GA2472@tishler.net>
	<4200D056.4010000@llnl.gov> <4200D22D.9070000@llnl.gov>
	<20050202133005.GE2472@tishler.net> <4208E247.8030706@llnl.gov>
	<20050208175514.GA3788@tishler.net>
Message-ID: <420A372F.7020800@llnl.gov>



Dear Jason,

    The "$ TMP=/tmp rebaseall" command worked! Thank you. When a new 
Cygwin is available w/ your changes please let me know...

Best regards,
    Dean

>On Tue, Feb 08, 2005 at 08:01:11AM -0800, Dean N. Williams wrote:
>  
>
>>$ rebaseall
>>/usr/bin/rebaseall: line 70: [: too many arguments
>>/usr/bin/rebaseall: line 75: [: too many arguments
>>/usr/bin/rebaseall: line 94: $TmpFile: ambiguous redirect
>>cannot read /cygdrive/c/Documents
>>
>>On my laptop installation everything works just fine. What is the
>>difference?
>>    
>>
>
>The TMP and/or TEMP environment variables have at least two spaces in
>them.
>
>The easiest workaround is to execute rebaseall like the following:
>
>    $ TMP=/tmp rebaseall
>
>Long term I will change rebaseall to deal better with spaces in shell
>variables.
>
>Jason
>
>  
>



From peter at engcorp.com  Thu Feb 24 22:01:22 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 24 Feb 2005 22:01:22 -0500
Subject: web status display for long running program
In-Reply-To: <509534af.0502241737.5f62992@posting.google.com>
References: <509534af.0502241737.5f62992@posting.google.com>
Message-ID: <uvudnX-pwMGcCIPfRVn-iw@powergate.ca>

Brian Roberts wrote:
> I have a command line Python program ...
> I think an optional web page would be convenient interface.  The
> Python program would listen on some port, and if queried (by me
> browsing to localhost:12345 for example) would return a pretty status
> display.  Hitting reload would update the status etc.
> 
> My problem is that I'm not sure how to do this:
> - I don't want to embed a full web server into the application or
> require any special PC setup.
> - I think I know how to listen on a socket, but not sure how to send
> stuff to to a web browser -- just start with <HTML>?  

See below.  I don't care if you use the code, it was fun to
whip up on the spur of the moment.  I'm quite certain that
if you try searching for "smallest web server" or something you'll
find a bunch of Perl guys who've competed to produce something
that does the same in a tenth the space...

> - Do I need a separate thread to listen and send the HTML?  The
> application is currently single threaded.  I'm confortable with
> threads, but would prefer to avoid them if possible.

If you don't want a thread, you probably don't need one, but
this might be a little cleaner to put in a thread.  I'm not
sure exactly what approach would be best to avoid a thread,
but using select() on the server socket, with a timeout of 0
to poll, instead of blocking as the following code does, would
probably be the simplest.

Try this out and maybe you can morph it into something like
what you want...

'''miniweb: microscopic web server'''

import socket
from select import select
from datetime import datetime

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(('', 80))
s.listen(5)
while True:
     cs = s.accept()[0]
     try:
         header = ''
         while True:
             r, w, e = select([cs], [], [cs], 2)
             if not r or e:
                 break

             header += cs.recv(1024)
             if '\r\n\r\n' in header:
                 break

         msg = ('<html><head><title>Miniweb!</title></head>'
             '<body><h3>Clock</h3><p>The time is %s</p></body></html>' % 
datetime.now())

         headers = '\r\n'.join([
             'HTTP/1.0 200 OK',
             'Server: Miniweb-0.1',
             'Content-Type: text/html',
             'Connection: close',
             'Content-Length: %s' % len(msg),
             ])

         cs.send(headers + '\r\n\r\n' + msg + '\n')

     finally:
         cs.close()


I make no claims that this will survive any particular kind
of use or abuse.  I did test with telnet, Firefox, Opera, and Explorer,
however.  A couple of key points found while testing:

1. Explorer needs you to read the header in its entirety, so I
had to add the part that actually scans the header for the
terminating sequence (\r\n\r\n).

2. There's a two-second timeout on reading the header,
in case something connects but doesn't send anything... not
really tested.

3. Some or most of the headers in the reply may not be
required.  Perhaps the first line and the Content-Length
(or not even that?) are all that are required.  Play if you want.
No doubt others will pick this apart and we'll all learn
something. ;-)

4. MIT license ;-)  as in don't complain to me if this
doesn't do what you need, but use it any way you wish...

-Peter


From steven.bethard at gmail.com  Fri Feb 18 19:28:50 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 18 Feb 2005 17:28:50 -0700
Subject: selecting dictionaries to maximize counts
In-Reply-To: <cv5v18$l9t$1@eeyore.INS.cwru.edu>
References: <oPGdnQfZXPnD0YvfRVn-oQ@comcast.com>
	<cv5v18$l9t$1@eeyore.INS.cwru.edu>
Message-ID: <EfydnY_Xc8WiFYvfRVn-jw@comcast.com>

Brian Beck wrote:
> Steven Bethard wrote:
> 
>> I have a list of dictionaries.  Each dictionary holds counts of 
>> various 'words', e.g.:
>>
>> py> countdicts = [
>> ...     dict(a=9, b=9, c=9),
>> ...     dict(a=8, b=7),
>> ...     dict(a=4, b=5, c=12)]
>>
>> I need to select dicts with the constraint that the number of each 
>> 'word' totalled over all selected dicts doesn't exceed a given 
>> MAX_VALUE.  Right now, I do this by:
> 
> Not that you can't still improve performance of course, but this is an 
> NP-complete problem if you didn't know, so don't bang your head too hard...

Yeah, it seemed a lot like one of those box-packing type problems, so if 
it's NP-complete, it wouldn't surprise me.  That's one of the reasons I 
mentioned trying A* in one of my other responses.  However, in 
retrospect, I don't think I can apply A* because I don't really have a 
"goal state".  I could call a selection where all "words" had MAX_VALUE 
counts a "goal state", but I'm not guaranteed that such a state always 
exists (and if it doesn't A* just degenerates into an exhaustive search).

Anyway, do you know what name this problem is usually discussed under? 
If I knew what to google for, I could probably find at least a few 
simple heuristics to try...

Thanks again,

STeVe


From maxm at mxm.dk  Tue Feb 22 08:50:12 2005
From: maxm at mxm.dk (Max M)
Date: Tue, 22 Feb 2005 14:50:12 +0100
Subject: UTF-8 / German,
 Scandinavian letters - is it really this difficult??
 Linux & Windows XP
In-Reply-To: <1109078512.094288.316030@z14g2000cwz.googlegroups.com>
References: <cve1vh$c37$1@phys-news1.kolumbus.fi>
	<1109078512.094288.316030@z14g2000cwz.googlegroups.com>
Message-ID: <421b385e$0$230$edfadb0f@dread12.news.tele.dk>

Fuzzyman wrote:
> Mike Dee wrote:

>>#!/usr/bin/env python
>># -*- coding: UTF-8 -*-

> This will mean string literals in your source code will be encoded as
> UTF8 - if you handle them with normal string operations you might get
> funny results.

It means that you don't have to explicitely set the encoding on strings.

If your coding isn't set you must write:

ust = '???'.decode('utf-8')

If it is set, you can just write:

ust = u'???'

And this string will automatically be utf-8 encoded:

st = '???'

So you should be able to convert it to unicode without giving an encoding:

ust = unicode(st)

-- 

hilsen/regards Max M, Denmark

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


From nhodgson at bigpond.net.au  Sun Feb 13 06:14:39 2005
From: nhodgson at bigpond.net.au (Neil Hodgson)
Date: Sun, 13 Feb 2005 11:14:39 GMT
Subject: SCons build tool speed
References: <SBsPd.4406$ZZ.3056@newssvr23.news.prodigy.net>
Message-ID: <zEGPd.159460$K7.151265@news-server.bigpond.net.au>

   ted:

> How does the speed of the Scons build tool compare with Ant?
> Right now with out Ant builds take around an hour. Hoping to
> speed that up.

   Scons emphasises accuracy over speed and is normally a little slower than
other build tools although still fast enough for most purposes. One cause of
slowness is that it reads the source files, traces include files and
checksums them all rather than relying on file times. There are some things
you can do to speed it up:
http://www.scons.org/cgi-bin/wiki/GoFastButton

   Neil




From jfj at freemail.gr  Mon Feb 21 17:36:29 2005
From: jfj at freemail.gr (jfj)
Date: Mon, 21 Feb 2005 14:36:29 -0800
Subject: lambda closure question
In-Reply-To: <slrnd1jjo4.jkb.apardon@rcpc42.vub.ac.be>
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
	<slrnd1jjo4.jkb.apardon@rcpc42.vub.ac.be>
Message-ID: <421A626D.7020007@freemail.gr>

Antoon Pardon wrote:
> Op 2005-02-19, jfj schreef <jfj at freemail.gr>:
> 
>>once foo() returns there is no way to modify 'x'!
>>It becomes a kind of constant.
> 
> 
> In this particular case yes. But not in general, what about
> this:
> 
> 
>>>>def F():
> 
> ...   l = []
> ...   def pop():
> ...     return l.pop()
> ...   def push(e):
> ...     l.append(e)
> ...   return pop, push
> ... 
> 

Others will point this out, but if I'm fast enough...

This does not change the object referenced by l.
It calls methods of it and because it is mutable the containts
of the list are modified.
'l' is a list at address, 0xXXXX and that can never change once
F() has returned.


jfj


From python-url at phaseit.net  Tue Feb  1 00:14:42 2005
From: python-url at phaseit.net (Cameron Laird)
Date: Tue, 01 Feb 2005 05:14:42 +0000
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Feb  1)
Message-ID: <mailman.1696.1107272934.22381.python-announce-list@python.org>

QOTW: "The right solution will end up being unique to Python though. It has
to feel like Python." -- Guido van Rossum
    http://aws.typepad.com/aws/2005/01/amazon_devcon_g_4.html

"Sparring with Alex Martelli is like boxing Mike Tyson, except that one
experiences brain enhancement rather than brain damage :)." -- beliavsky


    This is your opportunity to vote on the prospective creation of 
    de.comp.lang.python:
        http://groups.google.de/groups?selm=erneuter-CfV-1-Einrichtung-de.comp.lang.python-16.1.2005-Supersede%40dana.de
	http://gvv.th-h.de/

    eval() often inverts repr().  pickle() makes for more reliable
    serialization:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/f4324fe8aa00f7f5/

    Kamilche illustrates how scripting (Web-scraping, in this case)
    can put eBay (Google, Amazon, ...) under *your* control:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/1b0d7ebb06c49272

    Tim Churches pulls off the remarkable feat of appearing to say
    true, useful, and not-stultifying things on licensing:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/a1e07194c795f505/

    How declarative are metaclasses and decorators?  Diez B. Roggisch
    has been helpful with this and similarly interesting summaries and
    examples:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/a75da70b0845b6fe/
    Art Siegel also approaches the question, in a more narrative
    fashion.  Notice in the same thread Steve Holden's persistent
    advertising of PyCon 2005, emphasizing the celebrities (martellibot!,
    Armin "I Infer That" Rigo, ...) expected to appear, some for the
    first time ever in this dimension.

    Nick Coghlan explains the trickiness of Duncan Booth and F. 
    PetitJean.  This is a chance to practice generators, zip,
    map, and iter, all in about two lines:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/a6ba37b0fb0fa69e

    Do you know the standard library well enough to recognize its
    parametric statistics?
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/1ddd1e869fe6e08a/

========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Brett Cannon continues the marvelous tradition established by 
    Andrew Kuchling and Michael Hudson of intelligently summarizing
    action on the python-dev mailing list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    The Python Business Forum "further[s] the interests of companies
    that base their business on ... Python."
	http://www.python-in-business.org

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    deli.cio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topics/pythonurl/         
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.




From jonas at freesources.org  Mon Feb 21 14:36:33 2005
From: jonas at freesources.org (Jonas Meurer)
Date: Mon, 21 Feb 2005 20:36:33 +0100
Subject: display VARCHAR(mysql) and special chars in html
Message-ID: <20050221193632.GF5363@resivo.mejo.net>

hello,

my script selects a comment saved as VARCHAR in MySQL and displays it
inside an html page.

the problem is, that the comment contains several special characters, as
mysterious utf-8 hyphens, german umlauts, etc.

i could write a function to parse the comment and substitute special
chars with the relevant html code, but maybe this already exists in some
module?

if not, it'll be hard work, as i've to consider many special chars, and
at least iso-8859-1* and utf-8 as charmaps.

bye
 jonas


From markus_GETRIDOFALLCAPSwankus at hotmail.com  Wed Feb 23 20:42:37 2005
From: markus_GETRIDOFALLCAPSwankus at hotmail.com (Markus Wankus)
Date: Wed, 23 Feb 2005 20:42:37 -0500
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <87ekf76ozk.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
References: <cuo71l$gig$1@usenet.otenet.gr> <cvaoft$av6$1@usenet.otenet.gr>
	<874qg6937w.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<cvcv9b$nbm$1@usenet.otenet.gr> <37uk2kF5gv38bU1@individual.net>
	<nmSSd.25321$Am3.782245@news20.bellglobal.com>
	<cvi2c5$ibu$1@usenet.otenet.gr>
	<421c91c8$0$44647$a1866201@visi.com>
	<cvi5s1$4l5$1@usenet.otenet.gr> <383qkkF5k6rf4U1@individual.net>
	<8BIQdyL$iLHCFw9a@objmedia.demon.co.uk>
	<421CC14A.4050708@lazaridis.com>
	<87ekf76ozk.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
Message-ID: <8iaTd.15672$uO.565343@news20.bellglobal.com>

Nick Vargish wrote:
> Ilias Lazaridis <ilias at lazaridis.com> writes:
> 
> 
>>Guido is the one, who should care by time about the status of the
>>python-community.
> 
> 
> That one crashed my parser.
> 

Sounds like a new Ministry song - "Guido Crashed my Parser".  Could be 
the sequel to "Jesus Built My Hot Rod".


From domma at procoders.net  Fri Feb 11 05:18:31 2005
From: domma at procoders.net (Achim Domma (Procoders))
Date: Fri, 11 Feb 2005 11:18:31 +0100
Subject: Testing web applications
Message-ID: <cui0pe$r0c$04$1@news.t-online.com>

Hi,

I'm looking for frameworks to make testing web applications - i.e. 
parsing and filling out forms - easier. I found Puffin, which looks good 
but not very usable in the current state. I know that I once read about 
other nice frameworks, but could not find one via google. Any hints?

regards,
Achim


From grante at visi.com  Mon Feb 21 10:19:28 2005
From: grante at visi.com (Grant Edwards)
Date: 21 Feb 2005 15:19:28 GMT
Subject: Article on Hi-Fi Myths
References: <111hvnra44hgr03@corp.supernews.com>
	<867jl2h1u8.fsf@guru.mired.org>
Message-ID: <4219fc00$0$46539$a1866201@visi.com>

On 2005-02-21, Mike Meyer <mwm at mired.org> wrote:

>> 	"you just need to know what techniques to use to create a
>> 	'friendly', 'relaxing', energy pattern."
>
> I find that playing back Python code over multi-stranded copper
> produces the best results.

Only if you color the edges with a green marker first...

-- 
Grant Edwards                   grante             Yow!  MERYL STREEP is my
                                  at               obstetrician!
                               visi.com            


From tjprojects_usenet at yahoo.com  Wed Feb 16 13:55:50 2005
From: tjprojects_usenet at yahoo.com (tjprojects_usenet at yahoo.com)
Date: 16 Feb 2005 10:55:50 -0800
Subject: Loading functions from a file during run-time
References: <1108091598.055004.24890@g14g2000cwa.googlegroups.com>
	<1108576067.140194.115620@c13g2000cwb.googlegroups.com>
Message-ID: <1108580150.436813.227870@o13g2000cwo.googlegroups.com>

Wensheng wrote:
> #--- file bar.py

<snip>

> >>> foo="bar"
> >>> fs=__import__(foo)

<snip>

Wensheng:

The problem with this is that it assumes the text file is a valid
python file, and that the extension is ".py".  This may work for the
OP's situation; he would need to weigh in.  'exec'ing the functions
into the global namespace allows you to create functions from any
text-based source -- registry keys, ini files, user input, etc.


T.J.



From calvin at ironfroggy.com  Mon Feb 28 19:11:42 2005
From: calvin at ironfroggy.com (Calvin Spealman)
Date: Tue, 01 Mar 2005 00:11:42 +0000
Subject: Importing from filesystem path a 'frozen sub-module' error
Message-ID: <6316450.6I7sGcfX6l@ironfroggy.com>

I've been working on a small test runner script, to accumulate my test
scripts (all python files in the 'test' sub-directories of my source tree).
Things were going well, but I'm still having trouble loading the modules,
once I have a path to the python source file. This is the error I am
getting:

      mod_info = imp.find_module(module_name, module_path)
   ImportError: No frozen submodule named PyInvolgo.test.test_RepoBase

I know 100% sure the module exists (I can enter a python shell and import it
directly, no problem), so that isn't the problem. I don't know what a
'frozen sub-module' is, tho, and I haven't been able to find anything about
them from google searches and documentation on python.org.

At first, I thought maybe it was because the test directory had no
__init__.py (it isn't a package, so I didn't make one), but added one made
no difference.
-- 
 



From duncan.booth at invalid.invalid  Mon Feb 21 12:40:28 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 21 Feb 2005 17:40:28 GMT
Subject: Unittest - testing properties (read-only attributes)
References: <uu0o5c0br.fsf@yahoo.co.uk>
	<roy-7E7A58.12112821022005@reader2.panix.com>
	<uaKdncr3ppCbhIffRVn-rA@powergate.ca>
	<7xu0o5akr2.fsf@ruckus.brouhaha.com>
	<Xns9604B247481Cduncanrcpcouk@127.0.0.1>
Message-ID: <Xns9604B3C7A50FBduncanrcpcouk@127.0.0.1>

Duncan Booth wrote:

> An assignment expression, if such a thing existed wouldn't help here.

Although of course it would help if still inside a lambda.


From BOOGIEMANPN at YAHOO.COM  Thu Feb 10 16:06:08 2005
From: BOOGIEMANPN at YAHOO.COM (BOOGIEMAN)
Date: Thu, 10 Feb 2005 22:06:08 +0100
Subject: goto, cls, wait  commands
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
	<Xns95F9A4E32D0CBduncanrcpcouk@127.0.0.1>
	<420b9f4b$0$29241$626a14ce@news.free.fr>
	<cug9s3$l21$1@yggdrasil.glocalnet.net>
	<420bb95e$0$5259$39db0f71@news.song.fi>
Message-ID: <ftrudnahztf8.1qctts27j7d1t.dlg@40tude.net>

OK, thanks all
Here's presentation of my advanced programming skills :)
----------------------------------------
import os
import time

os.system("cls")

number = 78
guess = 0

while guess != number:
    guess = input("Guess number: ")
      
    if guess > number:
        print "Lower"
        time.sleep(3)
        os.system("cls")

    elif guess < number:  
        print "Higher"
        time.sleep(3)
        os.system("cls")

print "That's the number !"
---------------------------------------
BTW, I'm thinking to replace lines "time.sleep(3)"
with something like "Press any key to guess again"
How do I do that ?

Also I wanted to put at the end something like
"Do you want to guess again ?" and then "GOTO" start
of program, but since there is no such command in Python
what are my possible solutions ?



From roy at panix.com  Mon Feb 21 12:11:28 2005
From: roy at panix.com (Roy Smith)
Date: Mon, 21 Feb 2005 12:11:28 -0500
Subject: Unittest - testing properties (read-only attributes)
References: <uu0o5c0br.fsf@yahoo.co.uk>
Message-ID: <roy-7E7A58.12112821022005@reader2.panix.com>

In article <uu0o5c0br.fsf at yahoo.co.uk>, Paul Moore <pf_moore at yahoo.co.uk> 
wrote:

> I have a class with a read-only attribute, and I want to add a unit
> test to ensure that it really *is* read-only. I can do this as
> 
>     def test_readonly(self):
> 	"""Value and multiplier must be readonly"""
> 	try:
> 	    self.combat.value = 1
> 	    self.fail("Value is not read only")
> 	except AttributeError:
> 	    pass
> 
> That works, but it seems a bit clumsy. Is there a better way?
> 
> Thanks,
> Paul.

You want something like

self.assertRaises(AttributeError, lambda: self.combat.value = 1)


From robey at flaminglunchbox.net  Wed Feb  2 00:47:53 2005
From: robey at flaminglunchbox.net (Robey Holderith)
Date: Wed, 02 Feb 2005 00:47:53 -0500
Subject: Python Code Auditing Tool
Message-ID: <pan.2005.02.02.05.47.52.827795@flaminglunchbox.net>

Does anybody know of a tool that can tell me all possible exceptions that
might occur in each line of code?  What I'm hoping to find is something
like the following:

given all necessary python source and a given line ( my.py:40 ) it would
generate a list of possible exception classes sorted by function
(preferably in a tree).

Example:
------------------

my.py:40 |    parsestring(genstring())

Possible Exceptions:

-def parsestring():
  InvalidCharacterException
  EmptyStringException
  -class string, def split():
    (All Exceptions that might occur directly in string.split() that are
    not caught by parsestring())
    (All functions called by string.split() and their exceptions and sub-
    functions)
-def genstring():
  SomeException
  ...

--------------------

This would be extremely useful for deciding how to write try: except
blocks and in figuring out what all possible errors that might occur would
be.

-Robey Holderith



From mefjr75 at hotmail.com  Fri Feb  4 00:02:15 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 3 Feb 2005 21:02:15 -0800
Subject: OT: why are LAMP sites slow?
In-Reply-To: <7xy8e5jagh.fsf@ruckus.brouhaha.com>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
	<7xy8e5jagh.fsf@ruckus.brouhaha.com>
Message-ID: <1107490194.226679.159020@o13g2000cwo.googlegroups.com>

Paul Rubin wrote:
> Yes, good point about html tables, though I'm concerned primarily
> about server response.  (It's off-topic, but how do you use CSS to
get
> the effect of tables?)
To emulate a table you use the div and span tag.
(really you can do just about anything with div and span)
Div is a block level tag and span isn't.
You can also group them  together and nest them.
div and span have little meaning but the can be styled.
In the CSS declaration we create styles and then just use them later as
needed.
Try to always focus on layout first and actual style later. (CSS is all
about seperation of concerns)
You will find the verbosity of CSS is not as annoying as you might
think it might be, it is quite easy to learn and well worth the effort.
Ok here is a bad example ( do a search on Google for CSS tables ).
( this was torn out of a webapp I am working on )
.<div class='panel'>
.  <div class="archivehead"><strong>
.    <span class="leftspace">Archive</span>
.    <span class="rightspace">Entry Date</span>
.    </strong>
.  </div>
.      <div class="archivelite">
.        <span class="bold">%s</span><span>
.        <strong>%s</strong>
.        </span><span class="right">%s</span>
.      </div>
.      <div class="archivedark">
.        &nbsp &nbsp &nbsp &nbsp posted by: %s
.        <span class="right">
.        <strong>text </strong>
.        <strong> %s</strong>
.        </span>
.      </div>
.</div>
And here is some of the CSS
( these are classes the dot in front of the name tells you that, when
combined with div or span just about anything is possible. )
.  .panel {
.        border: solid thin #666677;
.        margin: 2em 4em 2em 4em;}
.  .leftspaces {
.        letter-spacing:.5em;
.        text-decoration:none;
.        color:#EEEEff;}
.  .rightspaces {
.        letter-spacing:.5em;
.        position: absolute;
.        right: 5em;
.        text-decoration: none;
.        color:#EEEEff;}
.
.  .archivehead {
.         text-indent:.5em;
.         background-color:#333333;}
.  .archivelite {
.         color:#777777;
.         text-indent:.5em;
.         background-color:#222222;}
.  .archivedark {
.         color:#777777; text-indent:.5em;
.         background-color:#111111;}
.  .archivelite a{
.         color:#BBBBDD;
.         text-decortation:none;
.         background-color:#222222;}
.  .archivedark a{
.         color:#BBBBDD;
.         text-decortation:none;
.         background-color:#111111;}
hth,
M.E.Farmer



From roland.heiber at web.de  Thu Feb  3 02:55:39 2005
From: roland.heiber at web.de (Roland Heiber)
Date: Thu, 03 Feb 2005 08:55:39 +0100
Subject: Generating .pyc/.pyo from a make file
In-Reply-To: <4201607f_2@news.arcor-ip.de>
References: <4308d2-0801.ln1@eskimo.tundraware.com>
	<42015a85_1@news.arcor-ip.de>
	<dh38d2-at71.ln1@eskimo.tundraware.com>
	<4201607f_2@news.arcor-ip.de>
Message-ID: <ctsldo$3po$1@news.web.de>

Roland Heiber wrote:
> Tim Daneliuk wrote:
>> under the impression that "compiled" meant optimized byte code that

You where right, i was totally mislead by "optimized" ... ;)

Greetings, Roland


From nick at craig-wood.com  Sat Feb 12 05:30:06 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 12 Feb 2005 10:30:06 GMT
Subject: ANN: pyMinGW support for Python 2.3.5 (final) is available
References: <1108189500.707806.316520@g14g2000cwa.googlegroups.com>
Message-ID: <slrnd0rmep.n4l.nick@irishsea.home.craig-wood.com>

A.B., Khalid <abkhd at earth.co.jp> wrote:
>  This is to inform those interested in compiling Python in MinGW that
>  an updated version of pyMinGW is now available.

Ha anyone tried cross compiling python with mingw?  At work we compile
our software for lots of platforms (including windows) on a linux
build host.  The windows builds are done with a mingw cross compiler.
It would be interesting if we could do this with python + extensions
also.

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


From Ralph.Arenz at friatec.de  Thu Feb 17 08:12:38 2005
From: Ralph.Arenz at friatec.de (Arenz, Ralph)
Date: Thu, 17 Feb 2005 14:12:38 +0100
Subject: tiff via email-module
Message-ID: <E84BE6FAB483D31182360090279CFF530A105CE2@kommsrv1.friatec.de>

hi all,

my problem is to get a tiff-file-attachment out of an email sent by a
fax-server.
When i try this with "get_payload(decode='True')" i get additional 
informations, looks like binary-mixed header-information, enveloping the 
tiff-data. 

I tried the following: Sending the email from outlook to a postfix-user and
a file on the postfix-host as well. The file shows the stucture mentioned
above. The mail for the postfix-user is deliverd correctly. So postfix must
fetch the raw tiff-data too!?.

Is there a way to get the raw tiff-data using the email-module?


Any ideas?

ralph


From samantha7395 at hotmail.com  Fri Feb 18 14:57:51 2005
From: samantha7395 at hotmail.com (Samantha)
Date: Fri, 18 Feb 2005 11:57:51 -0800
Subject: Probably over my head... Trying to get Font Names
References: <B8KdneiuyLaKoYjfRVn-vQ@adelphia.com>	<mailman.2786.1108689703.22381.python-list@python.org><8oydnSIY04Xby4jfRVn-iA@adelphia.com>	<mailman.2810.1108749030.22381.python-list@python.org><JpydncCe2to2sovfRVn-og@adelphia.com>
	<mailman.2816.1108754431.22381.python-list@python.org>
Message-ID: <ffWdncf04pxd1YvfRVn-tA@adelphia.com>

Mike,
Strange Hotmail.
I'll start over with the installs and you are correct on it being Numpy. I 
got the wrong file.
I'll give it a go and let you know.
Thanks!!!!
S
"Mike C. Fletcher" <mcfletch at rogers.com> wrote in message 
news:mailman.2816.1108754431.22381.python-list at python.org...
> Samantha wrote:
>




From john_sips_teaz at yahooz.com  Wed Feb 23 22:20:42 2005
From: john_sips_teaz at yahooz.com (John M. Gabriele)
Date: Wed, 23 Feb 2005 22:20:42 -0500
Subject: Like overloading __init__(), but how?
Message-ID: <pan.2005.02.24.03.20.40.119047@yahooz.com>

I know that Python doesn't do method overloading like
C++ and Java do, but how am I supposed to do something
like this:

--------------------- incorrect ------------------------
#!/usr/bin/python

class Point3d:
      pass

class Vector3d:
      """A vector in three-dimensional cartesian space."""

      def __init__( self ):
            """Create a Vector3d with some reasonable default value."""
            x, y, z = 0.0, 0.0, 0.0


      def __init__( self, x_from, y_from, z_from,
                          x_to,   y_to,   z_to ):
            """Create a Vector3d from x-y-z coords."""
            # ...
            pass


      def __init__( self, point_from, point_to ):
            """Create a Vector3d from two Point3d objects."""
            # ...
            pass
      

      def __init__( self, same_as_this_vec ):
            """Create a Vector3d from a copy of another one."""
            # ...
            pass

p = Point3d()
p2 = Point3d()
# v = Vector3d( p2, p ) -- Nope. Only the last __init__() counts.
 
---------------------- /incorrect -------------------------------

Thanks.

-- 
--- if replying via email, remove zees ---




From mwm at mired.org  Tue Feb  8 20:55:12 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 08 Feb 2005 19:55:12 -0600
Subject: An Ode To My Two Loves
References: <mailman.1982.1107624858.22381.python-list@python.org>
	<slrnd0cn2e.rr5.jgrahn-nntq@frailea.sa.invalid>
	<cu9usa$180$1@swifty.westend.com>
Message-ID: <8665128pkv.fsf@guru.mired.org>

Peter Maas <peter at somewhere.com> writes:

> Jorgen Grahn schrieb:
>> It's something that worries me frequently -- I feel guilty when I introduce
>> Python into ("force Python upon") an organization. Because I hate having
>> /other/ people's favorite toy languages forced down /my/ throat ...
>
> The solution is a multi language glue layer. Software interfaces are
> defined in a  language independent way so that they can be used by
> many  languages.I wonder why COM is so dominant on Windows and most
> Unixish systems don't use CORBA (with GNOME as an exception).
> Microsoft's .net takes this one step further by defining a multi
> language implementation layer.

COM is dominant on Windows because MS pushes it. CORBA isn't dominant
on Unix because there are a slew of extensible/embeddable languages to
pick from instead - assuming the apps in question came up with a
solution better than rolling their own. See <URL:
http://www.mired.org:8080/home/mwm/scripting/ > for my thoughts on the
matter before I learned better.

> I hope these ideas will become more influential in Unix like systems
> as well just to stop this resource wasting source code issue.

XMLRPC seems to be displacing CORBA for interobject
communications. It's not clear it's becoming an intercommunications
tool for scripting applications.

In any case, Plan 9 has a much better solution than COM, CORBA or
XMLRPC. I can script plan 9 applications with the shell. I can't do
that with CORBA (well, my quick search failed to turn up CORBA
bindings for sh. It can probably be done with XMLRPC, but it would be
ugly. The problem is that this requires fundamental changes in the
underlying OS (by adding per-process mount points), but there's
mention of experiments with that for Linux.

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From daniel_usenet at yahoo.de  Sun Feb 20 11:54:43 2005
From: daniel_usenet at yahoo.de (Daniel Lichtenberger)
Date: Sun, 20 Feb 2005 17:54:43 +0100
Subject: questions concerning cgi.FieldStorage(keep_blank_values=1)
References: <mailman.2865.1108917022.22381.python-list@python.org>
Message-ID: <37rtmjF5gk5l2U1@individual.net>

Hi,

Jonas Meurer wrote:

> if i request the script with script.py?key1&key2=foo, it will output:
> list keys with form.keys():
> key2
> 
> any suggestions about how to make form.keys() contain the blank keys
> as well?

"key1" isn't a valid parameter, to supply an empty key you would write
script.py?key1=&key2=foo

Then cgi.FieldStorage also includes key1.

bye,
Daniel

-- 
For mail replies please use my address from 
http://perplex.schmumpf.de/
http://www.gametective.de/


From carribeiro at gmail.com  Wed Feb  9 08:19:22 2005
From: carribeiro at gmail.com (Carlos Ribeiro)
Date: Wed, 9 Feb 2005 11:19:22 -0200
Subject: Big development in the GUI realm
In-Reply-To: <1grnxs8.1y1tcqq1d0o2bsN%aleaxit@yahoo.com>
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2118.1107818151.22381.python-list@python.org>
	<mailman.2123.1107820051.22381.python-list@python.org>
	<4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com>
	<cu95nd$7cr$1@news1.ucsd.edu>
	<6h7g0113up1v76k7qkad7bt17os1q73510@4ax.com>
	<mailman.2135.1107829480.22381.python-list@python.org>
	<e0ag011atnlt5b00klicjol93c7j8fe341@4ax.com>
	<c1rg0110sqmiqm28ka301bj9a506rdfoqt@4ax.com>
	<1grnxs8.1y1tcqq1d0o2bsN%aleaxit@yahoo.com>
Message-ID: <864d37090502090519755c7fc3@mail.gmail.com>

On Tue, 8 Feb 2005 11:44:10 +0100, Alex Martelli <aleaxit at yahoo.com> wrote:
> Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
> 
> > hassle to code, but if your application could dynamically select from
> > whatever toolkit is available on the machine, you (and I should emphasis
> > that this is an impersonal/generic "you" I reference) might be able to
> > argue an exemption from the QT license.
> 
> So maybe it's time to resurrect anygui, maybe in a simplified version
> which can only interface to, say, PyQt or Tkinter -- 'eithergui' maybe.

'onegui' to rule them all...

-- 
Carlos Ribeiro
Consultoria em Projetos
blog: http://rascunhosrotos.blogspot.com
blog: http://pythonnotes.blogspot.com
mail: carribeiro at gmail.com
mail: carribeiro at yahoo.com


From cjw at sympatico.ca  Wed Feb  2 09:08:41 2005
From: cjw at sympatico.ca (Colin J. Williams)
Date: Wed, 02 Feb 2005 09:08:41 -0500
Subject: type of simple object
In-Reply-To: <1107261198.943087.80960@z14g2000cwz.googlegroups.com>
References: <1107255752.258025.50870@z14g2000cwz.googlegroups.com>
	<1107257264.146280.89560@c13g2000cwb.googlegroups.com>
	<1107258136.815344.145380@c13g2000cwb.googlegroups.com>
	<tyfy8e8lcef.fsf@pcepsft001.cern.ch>
	<1107261198.943087.80960@z14g2000cwz.googlegroups.com>
Message-ID: <4200DEE9.3000901@sympatico.ca>

ajikoe at gmail.com wrote:
> Thank you guys.
> 
> My function should multiply every element  of a list, for example
> "something"
> and "something" can be an integer or another list.
> If it deals with integer than it is ok, but
> If it deals with list than it become false for example list*2 =
> listlist, and what I really want is to mutlitply its member.
> That's why I need to know the type of my data in "something".
> 
> By the way I am new in python, I heard that it has a MatLab
> capabilities, How good is that? Since It would be very nice when we can
> do what MatLab do in python.....
> 
> 
> Sincerely Yours,
> pujo
> 
If you are looking for MatLab like facilities you might consider 
numarray, available from sourceforge.

Colin W.


From steven.bethard at gmail.com  Fri Feb 25 21:34:53 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 25 Feb 2005 19:34:53 -0700
Subject: Code evaluation at function definition execution time (was Re:
 Compile time evaluation (aka eliminating default argument hacks))
In-Reply-To: <mailman.3074.1109381674.22381.python-list@python.org>
References: <mailman.2997.1109243714.22381.python-list@python.org>	<ceGdnSLOHIvbfIDfRVn-jg@comcast.com>
	<mailman.3074.1109381674.22381.python-list@python.org>
Message-ID: <KZ6dnTQd0MfWfYLfRVn-hA@comcast.com>

Nick Coghlan wrote:
> Anyway, if others agree that the ability to execute a suite at def 
> exeuction time to preinitialise a function's locals without resorting to 
> bytecode hacks is worth having, finding a decent syntax is the next 
> trick :)

I'm not certain how many use cases really require a full suite, though 
being able to define default values for function locals in the same way 
that default values can be defined for function arguments would be nice.

Worth looking at is the thread:

http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/58f53fe8bcc49664/

STeVe


From phil at riverbankcomputing.co.uk  Thu Feb 10 04:25:00 2005
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Thu, 10 Feb 2005 09:25:00 -0000 (GMT)
Subject: Newbie:  SWIG or SIP?
In-Reply-To: <cKKdnfEhSpyv65ffRVn-qg@comcast.com>
References: <cKKdnfEhSpyv65ffRVn-qg@comcast.com>
Message-ID: <47852.82.68.80.137.1108027500.squirrel@river-bank.demon.co.uk>

> I have a third-party DLL and it's associated .h file.  The DLL was written
> in C.  I have neither the associated .c files nor the .obj files for the
> DLL.  Can I use SWIG or SIP to build something that will allow me to use
> the
> DLL with Python?  And what is that something, an .obj file, another DLL or
> what?

Yes, you can use either SWIG or SIP. C (as opposed to C++) support was
added with SIP v4. The something is another DLL, conventionally given a
.pyd extenstion.

Phil



From altis at semi-retired.com  Wed Feb  2 16:01:33 2005
From: altis at semi-retired.com (Kevin Altis)
Date: Wed, 2 Feb 2005 13:01:33 -0800
Subject: REMINDER: Python proposals due February 13th for OSCON / Python 13
Message-ID: <C5bMd.39$Q55.2470@news.uswest.net>

Please submit your tutorial and session proposals for the Python track by
February 13th. The information and relevant URLs are below.

ka
---



The Call for Proposals has just opened for the
7th Annual O'Reilly Open Source Convention
http://conferences.oreillynet.com/os2005/

OSCON is headed back to friendly, economical Portland, Oregon during the
week of August 1-5, 2005. If you've ever wanted to join the OSCON
speaker
firmament, now's your chance to submit a proposal (or two) by February
13,
2005.

Complete details are available on the OSCON web site, but we're
particularly interested in exploring how software development is moving
to
another level, and how developers and businesses are adjusting to new
business models and architectures. We're looking for sessions,
tutorials,
and workshops proposals that appeal to developers, systems and network
administrators, and their managers in the following areas:

- All aspects of building applications, services, and systems that use
the
new capabilities of the open source platform
- Burning issues for Java, Mozilla, web apps, and beyond
- The commoditization of software: who and/or what can show us the
money?
- Network-enabled collaboration
- Software customizability, including software as a service
- Law, licensing, politics, and how best to navigate other troubled
waters

Specific topics and tracks at OSCON 2005 include: Linux and other open
source operating systems, Java, PHP, Python, Perl, Databases (including
MySQL and PostgreSQL), Apache, XML, Applications, Ruby, and Security.

Attendees have a wide range of experience, so be sure to target a
particular level of experience: beginner, intermediate, advanced. Talks
and tutorials should be technical; strictly no marketing presentations.
Session presentations are 45 or 90 minutes long, and tutorials are
either
a half-day (3 hours) or a full day (6 hours).

Feel free to spread the word about the Call for Proposals to your
friends,
family, colleagues, and compatriots. We want everyone to submit, from
American women hacking artificial life into the Linux kernel to Belgian
men building a better mousetrap from PHP and recycled military hardware.
We mean everyone!

Even if you don't want to participate as a speaker, send us your
suggestions--topics you'd like to see covered, groups we should bring
into
the OSCON fold, extra-curricular activities we should organize--to
oscon-idea at oreilly.com .

This year, we're moving to the wide open spaces of the Oregon Convention
Center. We've arranged for the nearby Doubletree Hotel to be our
headquarters hotel--it's a short, free Max light rail ride (or a lovely
walk) from the Convention Center.

Registration opens in April 2005; hotel information will be available
shortly.

Deadline to submit a proposal is Midnight (PST), February 13.

For all the conference details, go to:
http://conferences.oreillynet.com/os2005/

Press coverage, blogs, photos, and news from the 2004 O'Reilly Open
Source
Convention can be found at: http://www.oreillynet.com/oscon2004/

Would your company like to make a big impression on the open source
community? If so, consider exhibiting or becoming a sponsor. Contact
Andrew Calvo at (707) 827-7176, or andrewc at oreilly.com for more info.

See you Portland next summer,

The O'Reilly OSCON Team




From deetsNOSPAM at web.de  Thu Feb  3 11:02:25 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Thu, 03 Feb 2005 17:02:25 +0100
Subject: Calling a method using an argument
References: <ctth3v$o2r$1@ucsnew1.ncl.ac.uk> <36evn2F51nullU1@individual.net>
Message-ID: <36f02uF51nullU2@individual.net>

Diez B. Roggisch wrote:

> def test(self,arg):
>     return getattr(self, arg)
> 

Oops, missed the calling:

def test(self,arg):
    return getattr(self, arg)()


If you have more args, do this:

def test(self, *args):
    return getattr(self, args[0])(*args[1:])


-- 
Regards,

Diez B. Roggisch


From steve at holdenweb.com  Tue Feb  1 09:23:01 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 01 Feb 2005 09:23:01 -0500
Subject: PyCon signature advertising
In-Reply-To: <mailman.1690.1107267215.22381.python-list@python.org>
References: <lELLd.101987$Jk5.75234@lakeread01>
	<mailman.1690.1107267215.22381.python-list@python.org>
Message-ID: <cmMLd.102490$Jk5.42825@lakeread01>

Mike C. Fletcher wrote:

> Steve Holden wrote:
> ....
> 
>> I appreciate that not everyone has control over their .sig,
> 
> 
> ....
> 
> Take control of your sigs, my sisters and brothers!  Viva la 
> Revolution!  Follow the Steve into the heat and light of PyCon.  You can 
> achieve enlightenment if only you go to the District on the Eastern Edge 
> of the new continents when the spring arrives.  It is only there that 
> all will be revealed.  It is only there that you shall find peace.
> 
> Joy to the Python world!
> Mike
> 
> ________________________________________________
>  Mike C. Fletcher
>  Designer, VR Plumber, Coder
>  http://www.vrplumber.com
>  http://blog.vrplumber.com
>                              PyCon is coming...
> 
That's the spirit! Of course, a URL wouldn't hurt ;-)

backing-away-smiling-ly y'rs  - steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005          http://www.python.org/pycon/2005/
Steve Holden                           http://www.holdenweb.com/


From irmen.NOSPAM at xs4all.nl  Mon Feb 14 18:28:38 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Tue, 15 Feb 2005 00:28:38 +0100
Subject: multi threading in multi processor (computer)
In-Reply-To: <37ba2dF5b8slrU1@individual.net>
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<420a2938$0$22987$626a14ce@news.free.fr>
	<1107964587.818199.223980@g14g2000cwa.googlegroups.com>
	<mailman.2254.1107966236.22381.python-list@python.org>
	<7xr7jlwieq.fsf@ruckus.brouhaha.com>
	<420e7ee4$0$28976$e4fe514c@news.xs4all.nl>
	<37ba2dF5b8slrU1@individual.net>
Message-ID: <421133d8$0$28988$e4fe514c@news.xs4all.nl>

Leif K-Brooks wrote:
> Irmen de Jong wrote:
> 
>> the GIL must die.
>>
>> I couldn't resist:
>> http://www.razorvine.net/img/GIL.jpg
> 
> 
> Neither could I:
> 
> http://ecritters.biz/diegil.png
> 
> (In case it's not entirely obvious, the stick figure just slices the GIL 
> into two pieces with his sword, causing its blood to splatter on the wall.)

Naah.
What about:
http://www.razorvine.net/img/killGIL.jpg

--Irmen


From tarik.messaoudi at purplelabs.com  Thu Feb 17 06:59:39 2005
From: tarik.messaoudi at purplelabs.com (Tarik Messaoudi)
Date: Thu, 17 Feb 2005 12:59:39 +0100
Subject: need of  help
Message-ID: <4214872B.3080803@purplelabs.com>

Hello,

Please I need of  help about :
   * how to display an browser  window
   * how to display a window in the midle of the screen
    and finaly how to insert an image in a canvas within a program



From ncoghlan at iinet.net.au  Sat Feb 12 23:50:31 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 13 Feb 2005 14:50:31 +1000
Subject: namespaces module (a.k.a. bunch, struct, generic object, etc.)
 PEP
In-Reply-To: <420EC9BF.5020802@iinet.net.au>
References: <GaudndOHLML3M5bfRVn-vg@comcast.com>	<mailman.2383.1108124347.22381.python-list@python.org>	<LvSdnbe2vZhv2ZDfRVn-tQ@comcast.com>	<mailman.2436.1108183031.22381.python-list@python.org>	<fcadnXgIes3QBJDfRVn-uA@comcast.com>	<420DB64E.9020000@iinet.net.au>
	<420EC9BF.5020802@iinet.net.au>
Message-ID: <420EDC97.1080804@iinet.net.au>

Nick Coghlan wrote:
>     class Namespace(object):
>         # etc
>         def _update_dict(self, other):
>             for k in other:
>                 setattr(self, k, other[k])

This doesn't work, as it doesn't allow the sequence of 2-tuples. So I copied the 
relevant check for a keys() attribute from dict.update:

     def _update_dict(self, other):
         """Allow subclasses to easily override handling of dict updates
         Also allows dotted names in the source to be handled correctly

         Uses the "keys" attribute to identify mappings
         """
         try:
             items = other.keys()
         except AttributeError:
             for k, v in other:
                 setattr(self, k, v)
         else:
             for k in items:
                 setattr(self, k, other[k])

Another change I made was to the Record class. It now uses __new__ to initialise 
the instance dictionary with the defaults from the subclass definition, leaving 
__init__ free to be used to invoke update() like it is for a standard namespace:

     Py> from namespaces import Record
     Py> class Example(Record):
     ...   a = 1
     ...   b = ""
     ...   class _sub_sf(Record):
     ...     c = 3
     ...   def _sub_calc(): return "Calculated value!"
     ...
     Py> x = Example()
     Py> x
     Example(a=1, b='', calc='Calculated value!', sf=_sub_sf(c=3))
     Py> x = Example(a=3)
     Py> x
     Example(a=3, b='', calc='Calculated value!', sf=_sub_sf(c=3))
     Py> x = Example([("sf.c", 5)], a=3, b="altered")
     Py> x
     Example(a=3, b='altered', calc='Calculated value!', sf=_sub_sf(c=5))
     Py> x = Example({"sf.c": 5}, a=3, b="altered")
     Py> x
     Example(a=3, b='altered', calc='Calculated value!', sf=_sub_sf(c=5))

I also moved the module to my normal site:
http://boredomandlaziness.skystorm.net/misc/namespaces.py

Steven: Feel free to pick through this for anything you want to add to the PEP. 
That's why I'm posting it, after all :)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From rkern at ucsd.edu  Fri Feb 18 06:37:21 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Fri, 18 Feb 2005 03:37:21 -0800
Subject: Python, Matlab and AI question
In-Reply-To: <mailman.2789.1108700285.22381.python-list@python.org>
References: <mailman.2789.1108700285.22381.python-list@python.org>
Message-ID: <cv4k1h$i3f$1@news1.ucsd.edu>

dataangel wrote:
> I'm a student who's considering doing a project for a Machine Learning 
> class on pathing (bots learning to run through a maze). The language 
> primarily used by the class has been Matlab. I would prefer to do the 
> bulk of the project in python because I'm familiar with pygame (for the 
> visuals) but I already have a lot of AI code written in Matlab.
> 
> I'd like to be able to call Matlab code from within python. I'm not sure 
> this is possible. My code runs in Octave just fine.

There have been some bridges between Matlab and Python, but most of them 
are old, I believe.

   http://claymore.engineer.gvsu.edu/~steriana/Python/pymat.html

If you're on Windows, this may help:

   http://www.geocities.com/ptmcg/python/using_matlab_from_python.html

> I've heard about 
> numerical python and scipy, but I'm not sure what tool is going to mean 
> the least amount of recoding for me. At the very least I need to find a 
> really fast package for matrix operations.

That would be Numeric and scipy. You'll probably need Numeric anyways 
for pygame. scipy has a set of functions that try to mimic Matlab 
functionality with the same names, so that may help in translating the code.

> Anyone have any input on what the best tool for the job would be? I've 
> googled, but I figure it's best to ask experience ;)

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From aisaac0 at verizon.net  Fri Feb 11 01:07:50 2005
From: aisaac0 at verizon.net (David Isaac)
Date: Fri, 11 Feb 2005 06:07:50 GMT
Subject: a sequence question
References: <lzrKd.138680$K7.56500@news-server.bigpond.net.au><Xns95EC9DCBC6294duncanrcpcouk@127.0.0.1>
	<mailman.1553.1106960946.22381.python-list@python.org>
Message-ID: <WYXOd.16353$uc.1671@trnddc02>

"Nick Coghlan" <ncoghlan at iinet.net.au> wrote in message
news:mailman.1553.1106960946.22381.python-list at python.org...
> Using zip(*[iter(l)]*N) or zip(*(iter(l),)*N) simply extends the above to
the
> general case.

Clearly true.
But can you please go into much more detail for a newbie?
I see that [iter(l)]*N produces an N element list with each element being
the same iterator object, but after that
http://www.python.org/doc/2.3.5/lib/built-in-funcs.html
just didn't get me there.

Thanks,
Alan Isaac




From carl.manaster at gmail.com  Thu Feb  3 12:40:55 2005
From: carl.manaster at gmail.com (carl.manaster at gmail.com)
Date: 3 Feb 2005 09:40:55 -0800
Subject: Integrated Testing - Peppable?
In-Reply-To: <pan.2005.02.02.21.29.03.688303@jerf.org>
References: <1107373949.960435.212020@z14g2000cwz.googlegroups.com>
	<pan.2005.02.02.21.29.03.688303@jerf.org>
Message-ID: <1107452455.739263.145440@f14g2000cwb.googlegroups.com>

Thanks, Jeremy,

> No prose can compare to a live, functional demonstration.

I agree; that's what my prototype amounts to:

<http://prdownloads.sourceforge.net/zbt/zbt.zip?download>

(sorry, it's Windows-only)

But I take your larger message, and John's, to heart - this isn't
worthy of making it into Python.  OK; thanks anyway for taking the time
to think about it and reply.

Peace,
--Carl



From jmeile at hotmail.com  Tue Feb  8 03:32:44 2005
From: jmeile at hotmail.com (Josef Meile)
Date: Tue, 08 Feb 2005 09:32:44 +0100
Subject: Curses on Windows
In-Reply-To: <72c8d50d.0502060630.1c561599@posting.google.com>
References: <72c8d50d.0502060630.1c561599@posting.google.com>
Message-ID: <4208792C.8080008@hotmail.com>

Hi Peter,

> Last November I posted a message asking for advice on using simple
> screen handling techniques under Windows.  Since then I have been
> occupied with family / job /Christmas /living  and trying to
> understand curses under linux (it works, seems very complex, sure I'm
> missing something ...).  Only now am I returning to my original query.
> 
> One reply (in fact the only reply - thanks Tim Golden) suggested I
> look at http://flangy.com/dev/python/curses/
There was a similar thread last month. See my reply for more links. I
haven't tested them, but they may help.

how to ncurses on win32 platform:
http://mail.python.org/pipermail/python-list/2005-January/262511.html

> 
> Just tried that and got the message
> 
> "You don't have permission to access
> /dev/python/curses/files/wcurses-0.1-py2.4.zip on this server."
Yes, I also have problems.

Regards,
Josef


From http  Sat Feb  5 13:45:09 2005
From: http (Paul Rubin)
Date: 05 Feb 2005 10:45:09 -0800
Subject: Alternative to standard C "for"
References: <1107628331.816935.16760@o13g2000cwo.googlegroups.com>
Message-ID: <7xu0oqlubu.fsf@ruckus.brouhaha.com>

adomas.paltanavicius at gmail.com writes:
> problem. If i do ..in range(1, 100000000).. (what I really need
> sometimes), it takes few hundred megs of memory and slows
> down. Are there other good ways for this simple problem? Generators?

use xrange instead of range.


From http  Mon Feb 28 01:33:20 2005
From: http (Paul Rubin)
Date: 27 Feb 2005 22:33:20 -0800
Subject: Working with dbase files
References: <7MyUd.73116$911.65438@fe2.texas.rr.com>
Message-ID: <7xoee52nyn.fsf@ruckus.brouhaha.com>

Stan Cook <stan0934 at yahoo.com> writes:
> Does anyone know how I can access and read data from a dbase (.dbf)
> file?

Yeah, there's some module around someplace that does it.  I found it
with a few minutes of googling a while back.  It worked fine.  I don't
remember where it was.


From http  Wed Feb 16 14:11:42 2005
From: http (Paul Rubin)
Date: 16 Feb 2005 11:11:42 -0800
Subject: SHA1 broken
References: <mailman.2673.1108528360.22381.python-list@python.org>
	<421398ad$0$28984$e4fe514c@news.xs4all.nl>
Message-ID: <7xpsz0uxox.fsf@ruckus.brouhaha.com>

Irmen de Jong <irmen.NOSPAM at xs4all.nl> writes:
> > Also, the new findings only apply to hash collisions, not to the
> > invertibility of SHA1 hashes - thus, as Schneier points out, uses of
> > keyed hashes (such as HMAC) are not compromised by this.
> 
> What about HMAC-MD5?

HMAC-MD5 and HMAC-SHA1 should be affected by the vulnerability in about
the same way.  Based on some reasonable assumptions both should still
be secure.  

Note also that the 2**69 attack against SHA1 is an important
theoretical result, but nowhere near as bad a practical vulnerability
as the md5 break which allowed finding real collisions in a few
cpu-hours.  As someone on sci.crypt explained the SHA1 attack, "in
motor vehicle terms, SHA1 is a tank and they have discovered a way to
scratch the paint".


From eric_brunel at despammed.com  Mon Feb 28 06:24:05 2005
From: eric_brunel at despammed.com (Eric Brunel)
Date: Mon, 28 Feb 2005 12:24:05 +0100
Subject: Fonts
References: <mailman.3059.1109350848.22381.python-list@python.org>
Message-ID: <opsmwnafnprqur0o@eb.pragmadev>

On Fri, 25 Feb 2005 11:00:41 -0600, phil <phillip.watts at anvilcom.com> wrote:
> I'm cpmpletely lost on fonts.
>
> I'm using Tkinter
>
> I do medarial = '-*-Arial-Bold-*-*--24-*-*-*-ISO8859-1"
> or Courier or Fixed in various sizes.
>
> Works great on my RH 7.2
>
> But a small embedded system Im working on, nothing seems to work,
> almost everything falls back to a fixed 12

You should be able to use a font specification like (family, size [, style]), e.g ('helvetica', 24, 'bold'). This is the most portable way of specifying fonts (X11 font names may not work on some systems).

You can get the available font families on your system as seen by Tkinter/tk with:

 from Tkinter import *
import tkFont
root = Tk()
print tkFont.families()

BTW - according to http://www.tcl.tk/man/tcl8.4/TkCmd/font.htm#M25 - the font family names 'helvetica', 'times' and 'courier' are guaranteed to work anywhere with tk/Tkinter.

HTH
-- 
python -c 'print "".join([chr(154 - ord(c)) for c in "U(17zX(%,5.z^5(17l8(%,5.Z*(93-965$l7+-"])'


From rnd at onego.ru  Sat Feb 12 14:09:59 2005
From: rnd at onego.ru (Roman Suzi)
Date: Sat, 12 Feb 2005 22:09:59 +0300 (MSK)
Subject: Is email package thread safe? (fwd)
In-Reply-To: <slrnd0m5p9.26q.apardon@rcpc42.vub.ac.be>
References: <mailman.2245.1107959519.22381.python-list@python.org>
	<slrnd0k9jt.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2269.1107980125.22381.python-list@python.org>
	<slrnd0m5p9.26q.apardon@rcpc42.vub.ac.be>
Message-ID: <Pine.LNX.4.62.0502122207050.12818@rnd.onego.ru>

On Thu, 10 Feb 2005, Antoon Pardon wrote:

> Op 2005-02-09, Roman Suzi schreef <rnd at onego.ru>:
>> On Wed, 9 Feb 2005, Antoon Pardon wrote:
>>
>>> Op 2005-02-09, Roman Suzi schreef <rnd at onego.ru>:
>>>>
>>>> Just to be sure, is email package of Python 2.3 thread-safe or not
>>>> (to use, for example, in python-milter?)
>>
>>>> Can I assume that everything
>>>> else without such notice is thread-safe?
>>>
>>> I doubt it. There is no indication that the email package uses any
>>> kind of locking. So multiple thread working on the same message
>>> will probably screw things up.
>>
>> Of course, I do not let threads to work on the same message!
>
> Why should that be: "off course"? The random module you spoke about
> was also only thread unsafe if you called the same random generator
> from various threads. Using a randon generator per thread shouldn't
> have been a problem. Since you mentioned that, I thought that was
> the kind of thread safety you were after.
>
>> I meant that the package doesn't pose other kinds of restrictions.
>> Can it work in _any_ situation work on two different messages at the same
>> time, without any interference?
>
> I can't give a guarantee, but there are no global statements and there
> doesn't seem to be assignments to cross module variables I think it
> would be a safe bet.

Thanks to all who discussed this. Really, I had the same thoughts about
1:1 object-thread relation being thread safe. I am doing further research and
if it will give interesting results, I shall post [solved] here.

Sincerely yours, Roman Suzi
-- 
rnd at onego.ru =\= My AI powered by GNU/Linux RedHat 7.3


From onurb at xiludom.gro  Wed Feb  9 04:41:53 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Wed, 09 Feb 2005 10:41:53 +0100
Subject: Lambda
In-Reply-To: <7UdOd.109$0b3.4707@news.uswest.net>
References: <7UdOd.109$0b3.4707@news.uswest.net>
Message-ID: <4209dae3$0$958$626a14ce@news.free.fr>

e wrote:
> here's what is probably an unusual question: 
> 
> 

A very open one at least !-)

-- 
bruno desthuilliers
ruby -e "print 'onurb at xiludom.gro'.split('@').collect{|p| 
p.split('.').collect{|w| w.reverse}.join('.')}.join('@')"
--


From donn at drizzle.com  Mon Feb 14 00:25:58 2005
From: donn at drizzle.com (Donn Cave)
Date: Mon, 14 Feb 2005 05:25:58 -0000
Subject: Kill GIL
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<cum62t$3fb$1@panix2.panix.com>
	<mailman.2463.1108256227.22381.python-list@python.org>
	<868y5t6sal.fsf@guru.mired.org> <cumoue$9ur$1@panix2.panix.com>
	<86sm405d38.fsf@guru.mired.org>
	<mailman.2508.1108351865.22381.python-list@python.org>
Message-ID: <1108358757.577366@yasure>

Quoth Dave Brueck <dave at pythonapocrypha.com>:
...
| Another related benefit is that a lot of application state is implicitly and 
| automatically managed by your local variables when the task is running in a 
| separate thread, whereas other approaches often end up forcing you to think in
| terms of a state machine when you don't really care* and as a by-product you 
| have to [semi-]manually track the state and state transitions - for some 
| problems this is fine, for others it's downright tedious.

I don't know if the current Stackless implementation has regained any
of this ground, but at least of historical interest here, the old one's
ability to interrupt, store and resume a computation could be used to

As you may know, it used to be, in Stackless Python, that you could have
both.  Your function would suspend itself, the select loop would resume it,
for something like serialized threads.  (The newer version of Stackless
lost this continuation feature, but for all I know there may be new
features that regain some of that ground.)

I put that together with real OS threads once, where the I/O loop was a
message queue instead of select.  A message queueing multi-threaded
architecture can end up just as much a state transition game.  

I like threads when they're used in this way, as application components
that manage some device-like thing like a socket or a graphic user interface
window, interacting through messages.  Even then, though, there tend to
be a lot of undefined behaviors in events like termination of the main
thread, receipt of signals, etc.

	Donn Cave, donn at drizzle.com


From aleaxit at yahoo.com  Sat Feb  5 05:07:10 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 5 Feb 2005 11:07:10 +0100
Subject: "Collapsing" a list into a list of changes
References: <dvOMd.33656$EG1.19314@lakeread04>
	<xqCdnQlfh-iEJ57fRVn-sw@comcast.com>
Message-ID: <1gribme.1b8vjvuz98jhkN%aleaxit@yahoo.com>

Steven Bethard <steven.bethard at gmail.com> wrote:

> Here's a solution that works for iterables other than lists:
> 
> py> def collapse(iterable):
> ...     enumeration = enumerate(iterable)
> ...     _, lastitem = enumeration.next()
> ...     yield lastitem
> ...     for i, item in enumeration:
> ...         if item != lastitem:
> ...             yield item
> ...             lastitem = item
> ...
> py> lst = [0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5]
> py> list(collapse(lst))
> [0, 1, 2, 3, 2, 4, 5]
> 
> Again, I'm still not sure I'd call this more elegant...

Hmmmm, what role does the enumeration play here?  I don't see how you're
using it, at all.  Why not just:

def collapse(iterable):
    it = iter(iterable)
    lastitem = it.next()
    yield lastitem
    for item in it:
        if item != lastitem:
            yield item
            lastitem = item

that's basically just the same as your code but without the strangeness
of making an enumerate for the purpose of ignoring what the enumerate
adds to an ordinary iterator.


Alex


From deetsNOSPAM at web.de  Fri Feb 18 07:05:35 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 18 Feb 2005 13:05:35 +0100
Subject: [newbie]How to install python under DOS and is there any
	Wxpython can be installed under dos?
References: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
	<1108557065.547230.254540@z14g2000cwz.googlegroups.com>
	<b9-dnTQOwoYK647fRVn-2Q@rogers.com>
	<11172sa1sg2svc8@corp.supernews.com>
	<l4OdneC_7ZH2oInfRVn-3A@rogers.com>
	<zkZQd.9062$Sl3.275762@news4.e.nsc.no>
	<WC0Rd.5165$VI5.2979@newsread3.news.atl.earthlink.net>
	<4K6dneoBWMc4KInfRVn-rA@rogers.com>
	<37jsdgF5e56jeU1@individual.net> <4qgbt58f.fsf@python.net>
Message-ID: <37m3vaF5f0askU1@individual.net>

Thomas Heller wrote:

> "Diez B. Roggisch" <deetsNOSPAM at web.de> writes:
> 
>> Maybe somehow the pygame sdl wrapper can be used for gui-stuff. SDL has
>> had a DOS mode. But it is discontinued.
> 
> What exactly is discontinued?  pygame? SDL?

The dos mode of sdl.
-- 
Regards,

Diez B. Roggisch


From john_sips_teaz at yahooz.com  Thu Feb 17 11:03:39 2005
From: john_sips_teaz at yahooz.com (John)
Date: Thu, 17 Feb 2005 11:03:39 -0500
Subject: difference between class methods and instance methods
In-Reply-To: <Xns96005FE3164DAduncanrcpcouk@127.0.0.1>
References: <pan.2005.02.17.07.04.37.907754@yahooz.com>
	<Xns96005FE3164DAduncanrcpcouk@127.0.0.1>
Message-ID: <1119g2rre5g610c@corp.supernews.com>

Duncan Booth wrote:
> John M. Gabriele wrote:
> 
> 
>>I've done some C++ and Java in the past, and have recently learned
>>a fair amount of Python. One thing I still really don't get though
>>is the difference between class methods and instance methods. I
>>guess I'll try to narrow it down to a few specific questions, but
>>any further input offered on the subject is greatly appreciated:
> 
> 
> I'll try not to cover the same ground as Steven did in his reply.
> 

Thanks for taking the time to reply Duncan.

> 
>>1. Are all of my class's methods supposed to take 'self' as their
>>first arg?
> 
> consider this:
> 
>   class Demo(object):
> 
>     def foo(self, x):
>         print self, x
>     @classmethod
>     def clsmethod(cls, x):
> 	print cls, x
>     @staticmethod
>     def stmethod(x):
> 	print x
> 
> 	
> 
> instance = Demo()
> 
> 
> Calling a bound method, you don't pass an explicit self parameter, but the 
> method receives a self parameter:
> 
> 
> bound = instance.foo
> bound(2)
> 
> <__main__.Demo object at 0x00B436B0> 2
 >
> Note that it doesn't matter whether you call instance.foo(2) directly, or 
> bind instance.foo to a variable first. Either will create a *new* bound 
> method object, and the correct instance is used for the call.

Za! What do you mean, "create a new bound method object"? I *already*
created that method when I def'd it inside the 'class Demo' statement,
no?

> This is 
> significantly different from languages such as C++ and Javascript which are 
> a real pain if you want to use a method as a callback.
> 
> Calling an unbound method, you pass a self parameter explicitly (and it 
> must be an instance of the class, *or an instance of a subclass*:
> 
> 
> unbound = Demo.foo
> unbound(instance, 2)
> 
> <__main__.Demo object at 0x00B436B0> 2

Ahhhhhhhh! See, coming from C++, the first thing I thought
when I saw what you just wrote was, "whoops, he shouldn't be
calling that instance method via the class name -- it's a bad
habit". Now I think I see what you mean: you may call an
instance method in two ways: via an instance where you don't
pass in anything for 'self', and via the class name, where
you must supply a 'self'.

> Again is doesn't matter whether you do this in one step or two. The usual 
> case for using an unbound method is when you have overridden a method in a 
> derived class and want to pass the call on to a base class. e.g.

Ok. Interesting.

> 
> class Derived(Demo):
> 
>     def foo(self, x):
>          Demo.foo(self, x)
> 
> A class method is usually called through the class rather than an instance, 
> and it gets as its first parameter the actual class involved in the call:
> 
> 
> Demo.clsmethod(2)
> 
> <class '__main__.Demo'> 2
> 
> Derived.clsmethod(2)
> 
> <class '__main__.Derived'> 2

Check.

> You can call a class method using an instance of the class, or of a 
> subclass, but you still the get class passed as the first parameter rather 
> than the instance:
> 
> 
> d = Derived
> d.clsmethod(2)
> 
> <class '__main__.Derived'> 2

Ok, so it looks like it may lead to confusion if you do that.
I wonder why the language allows it...


> A common use for class methods is to write factory functions. This is 
> because you can ensure that the object created has the same class as the 
> parameter passed in the first argument. Alternatively you can use class 
> methods to control state related to a specific class (e.g. to count the 
> number of instances of that exact class which have been created.)
> 
> There is no equivalent to a class method in C++.

Right. I see -- because in Python, a reference the actual class
object is implicitly passed along with the method call. Whereas,
C++ doesn't even have "class objects" to begin with.

> 
> Static methods are like static methods in C++. You can call them through 
> the class or a subclass, or through an instance, but the object used in the 
> call is not passed through to the method:
> 
> 
> Demo.stmethod(2)
> 
> 2
> 
> instance.stmethod(2)
> 
> 2
> 
> Derived.stmethod(2)
> 
> 2
> 
> d.stmethod(2)
> 
> 2
> 
> 
>>2. Am I then supposed to call them with MyClass.foo() or instead:
>>
>>    bar = MyClass()
>>    bar.foo()
>>?
> 
> 
> If you have an instance then use it. If the class method is a factory then 
> you might want to create a new object of the same type as some existing 
> object (but not a simple copy since you won't get any of the original 
> object's state). Mostly though you know the type of the object you want to 
> create rather than having an existing instance lying around.
> 
> 
>>3. Is "bound method" a synonym for instance method?
> 
> 
> Close but not quite. It is a (usually transient) object created from an 
> unbound instance method for the purposes of calling the method.

... hmm... bound methods get created each time you make
a call to an instance method via an instance of the given class?


>>4. Is "unbound method" a synonym for class method?
> 
> 
> Definitely not.

Right. :)

> 
>>And if anyone's *really* daring:
>>Where do the so-called "static methods" fit into all this?
>>By the name of them, it sounds like the same thing as class
>>methods...
> 
> 
> See above.
> 


-- 
--- remove zees if replying via email ---


From justscott at gmail.com  Wed Feb 16 12:53:05 2005
From: justscott at gmail.com (JustScott)
Date: Wed, 16 Feb 2005 11:53:05 -0600
Subject: [Errno 18] Invalid cross-device link using os.rename
In-Reply-To: <20050215003118.GC6339@unpythonic.net>
References: <1108414124.890402.109480@z14g2000cwz.googlegroups.com>
	<20050215003118.GC6339@unpythonic.net>
Message-ID: <401c37a405021609534f57112b@mail.gmail.com>

Thanks, Jeff.  I appreciate the input. I just stuck with os.system('mv
%s %s').  Seems to work fine.


On Mon, 14 Feb 2005 18:31:18 -0600, Jeff Epler <jepler at unpythonic.net> wrote:
> mv is a surprisingly complex program, while os.rename is a wrapper
> around rename(2) which is probably documented on your system to return
> EXDEV under these circumstanes.
> 
> os.xxx is generally a fairly thin wrapper around what your OS provides,
> and inherits all the "gotchas".  For some activities, os.shutil provides
> something that is between os.xxx and os.system("xxx") in complexity and
> capability.
> 
> Jeff
> 
> 
>


From Scott.Daniels at Acm.Org  Thu Feb 24 14:31:41 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Thu, 24 Feb 2005 11:31:41 -0800
Subject: Canonical way of dealing with null-separated lines?
In-Reply-To: <lczmxtpyp3.fsf@gaffa.mit.edu>
References: <lcll9efw8l.fsf@gaffa.mit.edu>
	<mailman.3006.1109264015.22381.python-list@python.org>
	<lczmxtpyp3.fsf@gaffa.mit.edu>
Message-ID: <421e2776@nntp0.pdx.net>

Douglas Alan wrote:
...
> In any case, as a suggestion to the whomever it is that arranges for
> stuff to be put into the standard library, there should be something
> like this there, so everyone doesn't have to reinvent the wheel (even
> if it's an easy wheel to reinvent) for something that any sysadmin
> (and many other users) would want to do on practically a daily basis.

The general model is that you produce a module, and if it gains a
audience to a stable interface, inclusion might be considered.  I'd
suggest you put up a recipe at ActiveState.

--Scott David Daniels
Scott.Daniels at Acm.Org


From ilias at lazaridis.com  Sat Feb 19 11:54:59 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sat, 19 Feb 2005 18:54:59 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cv7nh1$b57$03$1@news.t-online.com>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr> <cv7k8e$4pa$03$1@news.t-online.com>
	<cv7m2m$gp$1@usenet.otenet.gr> <cv7nh1$b57$03$1@news.t-online.com>
Message-ID: <cv7r15$lhm$1@usenet.otenet.gr>

Diez B. Roggisch wrote:
> Ilias Lazaridis wrote:
>>Diez B. Roggisch wrote:
>>>>Should a professional developer take python serious?
>>[...] - (ungentle babbling after disrupting coherence of writings)
> 
> And that from you.... *lol*

Of course.

I respect the "coherence of writings" of my conversation partners.

[If they are in-topic / in-context]

>>I mean, if the team does not manage at least the foundation of a
>>multi-target automated-build-process?
> 
> Repeating nonsense doesn't increase it's validity. Python makes use of
[...] - (babbling, gentle links)

Thank you for the links.

They are irrelevant for me.

But other readers for sure will enjoy.

-

The automated-build-process-system should allow community-members to add 
their targets into an special "incubation section", which does not in 
any way affect the "main section" (which contains the official 
production targets).

If an "incubation section" target proves over time as stable and 
supported, it is moved to the "official-auto-build".

>>[targets need not to be supported directly by the python team. They
>>could be added/managed/maintained by community members]
> 
> You already found the mingw-patch for building python. It is
> added/managed/maintained by community members.

This is a one-man-show, which does not invite to open collaboration 
(feedback is requested to closed email):

http://groups-beta.google.com/group/comp.lang.python/msg/98fa42dabff68db2

python [foundation, crew, dictator, ...] should engourage open 
collaboration, should engourage _collaboration_.

> Just out of curiousity: How many python extensions are you planning to
> write? 

I estimate 10 to 100, depending on abstractional capabilities of the 
extension system.

> And how many lines of pure python code have you written in your life? 

0 (zero).

.

-- 
http://lazaridis.com


From aurora00 at gmail.com  Fri Feb 18 12:10:04 2005
From: aurora00 at gmail.com (aurora)
Date: Fri, 18 Feb 2005 09:10:04 -0800
Subject: unicode encoding usablilty problem
Message-ID: <opsmekm2ei6yt6e7@news.cisco.com>

I have long find the Python default encoding of strict ASCII frustrating.  
For one thing I prefer to get garbage character than an exception. But the  
biggest issue is Unicode exception often pop up in unexpected places and  
only when a non-ASCII or unicode character first found its way into the  
system.

Below is an example. The program may runs fine at the beginning. But as  
soon as an unicode character u'b' is introduced, the program boom out  
unexpectedly.

>>> sys.getdefaultencoding()
'ascii'
>>> a='\xe5'
>>> # can print, you think you're ok
... print a
?
>>> b=u'b'
>>> a==b
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe5 in position 0:  
ordinal not in range(128)
>>>


One may suggest the correct way to do it is to use decode, such as

   a.decode('latin-1') == b


This brings up another issue. Most references and books focus exclusive on  
entering unicode literal and using the encode/decode methods. The fallacy  
is that string is such a basic data type use throughout the program, you  
really don't want to make a individual decision everytime when you use  
string (and take a penalty for any negligence). The Java has a much more  
usable model with unicode used internally and encoding/decoding decision  
only need twice when dealing with input and output.

I am sure these errors are a nuisance to those who are half conscious to  
unicode. Even for those who choose to use unicode, it is almost impossible  
to ensure their program work correctly.


From hakan at zyberit.com  Sat Feb  5 12:01:50 2005
From: hakan at zyberit.com (=?ISO-8859-1?Q?H=E5kan_Persson?=)
Date: Sat, 05 Feb 2005 18:01:50 +0100
Subject: How to read POSTed data
Message-ID: <4204FBFE.70408@zyberit.com>

Hi.

I am trying to set up a simple HTTP-server but I have problems reading 
data that is beeing POSTed.

class httpServer(BaseHTTPServer.BaseHTTPRequestHandler):
    def do_POST(self):
        input = self.rfile.read()

The self.rfile.read() will hang on the
data = self._sock.recv(recv_size)
line in the read() function in socket.py.

Is there another way to read the data?

Thanks,
H?kan Persson



From fredrik at pythonware.com  Wed Feb  9 13:18:25 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 9 Feb 2005 19:18:25 +0100
Subject: python code with indention
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com><110hq18fbebn0b1@news.supernews.com>
	<1107972416.931714.256210@l41g2000cwc.googlegroups.com>
Message-ID: <cudk26$bdf$1@sea.gmane.org>

Xah Lee wrote:

>i thought it is trivial for the Python parser to spit out a version
> with matching brackets. Similarly, perhaps some opensourcing student
> has modified a parser to read in a matching brackets delimited version
> of Python.

$ python Tools\scripts\pindent.py
You must specify -c(omplete), -d(elete) or -r(eformat)

usage: pindent (-c|-d|-r) [-s stepsize] [-t tabsize] [-e] [file] ...
-c         : complete a correctly indented program (add #end directives)
-d         : delete #end directives
-r         : reformat a completed program (use #end directives)
-s stepsize: indentation step (default 8)
-t tabsize : the worth in spaces of a tab (default 8)
-e         : expand TABs into spaces (defailt OFF)
[file] ... : files are changed in place, with backups in file~
If no files are specified or a single - is given,
the program acts as a filter (reads stdin, writes stdout). 





From neutrinman at myrealbox.com  Sun Feb 27 07:52:35 2005
From: neutrinman at myrealbox.com (neutrinman at myrealbox.com)
Date: 27 Feb 2005 04:52:35 -0800
Subject: error: db type could not be determined
In-Reply-To: <1109413706.437205.286070@o13g2000cwo.googlegroups.com>
References: <1109407276.520167.190630@f14g2000cwb.googlegroups.com>
	<1109413706.437205.286070@o13g2000cwo.googlegroups.com>
Message-ID: <1109508755.456000.178430@f14g2000cwb.googlegroups.com>

Thank you for your reply, Jhon.
It was useful advice.

> Take a hint: they say "Google is your friend", but better still is
the
> source in lib\*.py -- it's quite legible, you don't need an Internet
> connection, and there sure ain't no ads in the margin. And don't just
> open it in emergencies: pick a module that covers a topic that
> interests you and just read it. You'll see good coding style, good
ways
> of doing things, wise utterances by the timbot, ...

I am new to programing so I was wasting a lot of time to fix bug, only
struggling with my code where an error has occured then read throug an
book at hand. I didn't think of such an approch to solve problems and
read error messages.

Thank you again very much for the imformative advice.



From dimitri.pater at gmail.com  Fri Feb 18 06:58:00 2005
From: dimitri.pater at gmail.com (dimitri pater)
Date: Fri, 18 Feb 2005 12:58:00 +0100
Subject: How do I make my program start fullscreen ?
In-Reply-To: <17smpt9l5tn7z.1744dg3zal7hj.dlg@40tude.net>
References: <17smpt9l5tn7z.1744dg3zal7hj.dlg@40tude.net>
Message-ID: <e75321bd05021803581e4f7f21@mail.gmail.com>

If you're using Tkinter, the next url might help:
http://effbot.org/zone/tkinter-toplevel-fullscreen.htm


On Tue, 15 Feb 2005 23:35:05 +0100, BOOGIEMAN <BOOGIEMANPN at yahoo.com> wrote:
> os = windows xp
> How do I make "myprogram.py" start fullscreen at windows command prompt ?
> Also I made it as "myprogram.exe" with py2exe,but how to start fullscreen ?
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
Please visit dimitri's website: www.serpia.com


From administrata at hotmail.com  Sun Feb 13 05:04:46 2005
From: administrata at hotmail.com (administrata)
Date: 13 Feb 2005 02:04:46 -0800
Subject: [NooB] a Variable in multiple quotes...
Message-ID: <614c778e.0502130204.5824cddf@posting.google.com>

Is it possible? 

I tried...


I = "John"
print \
"""
I used to love pizza"""


Error occurs!!!

But, I don't know how to fix... HELP

thx 4 reading.


From luke at tatooine.planet  Mon Feb  7 20:00:10 2005
From: luke at tatooine.planet (Luke Skywalker)
Date: Tue, 08 Feb 2005 02:00:10 +0100
Subject: Big development in the GUI realm
References: <mailman.2123.1107820051.22381.python-list@python.org>
Message-ID: <4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com>

On Tue, 08 Feb 2005 10:47:25 +1100, Tim Churches
<tchur at optushome.com.au> wrote:
>So there you have it: there must be some portion of the GPLed Program contained in 
>the other work for it to fall under the scope of the GPL, and/or as defined as a 
>derivative work in local copyright law (local because the GPL does not nominate a 
>particular jurisdiction for covering law).

Has someone worked with Qt for Windows before, and could tell us
whether it involves static or dynamic linking?

If dynamic, then, it doesn't make sense that an EXE that builds on Qt
should also be GPLed.

Luke.


From export at hope.cz  Thu Feb 17 05:26:36 2005
From: export at hope.cz (export at hope.cz)
Date: 17 Feb 2005 02:26:36 -0800
Subject: MYSQL - how to install ?
In-Reply-To: <mailman.2686.1108564423.22381.python-list@python.org>
References: <1108547199.260223.211450@f14g2000cwb.googlegroups.com>
	<1108556905.444394.210020@l41g2000cwc.googlegroups.com>
	<1108562949.825258.297260@f14g2000cwb.googlegroups.com>
	<mailman.2686.1108564423.22381.python-list@python.org>
Message-ID: <1108635996.165520.132960@o13g2000cwo.googlegroups.com>


Daniel Bowett wrote:
> Lad wrote:
> > I am sorry it was my fault I did not say that clearly.
> >  I do not have a problem to install MySQL  server but I do not know
how
> > to install MySQLdb module on my windowsXP so that I can work  with
> > MySQL server via Python 2.3.
> > Thanks for help
> > Lad
> >
>
> Try this installer, if you want a newer version you will need to
compile
> it yourself.
>
>
http://prdownloads.sourceforge.net/mysql-python/MySQL-python.exe-1.0.0.win32-my4.1-py2.3.exe?download

Thank you I will try. As far as I understand I can install the latest
MySQL server and then MySQLdb module on my windowsXP with the
installer( the link you provided above).
Is it so?
Lad.



From deetsNOSPAM at web.de  Mon Feb 14 11:19:29 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 14 Feb 2005 17:19:29 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<4210a434$0$23451$626a14ce@news.free.fr>
	<mailman.2539.1108397140.22381.python-list@python.org>
Message-ID: <37c1cgF35vfuvU1@individual.net>

> Now, it's rather common to accuse people of trolling these days.
> The fact that Markus Wankus said that Ilias is a troll does not mean
> that everybody should reply to him in that tone.
> This is a one .vs many battle and it sucks.

Just because someone says somebody else is a troll surely is not valid
reason to take that for granted.

But googling [1-*] for Mr. Lazaridis makes it apparent that he _is_ a troll.
And even if you only take the two threads on c.l.py into account IMHO you
can see that. 

He's been _banned_ from several OS project mailing lists like eclipse,
netbeans and hibernate. Of course he claims that is because of censorship
and has nothing to do with his actions in those respective communities. But
somehow to me at least a pattern is visible.


[1]:
http://groups-beta.google.com/group/comp.lang.java.softwaretools/browse_frm/thread/836fe2380e6e2649/748a70ee4e39fc41?q=Lazaridis+Ilias&_done=%2Fgroups%3Fq%3DLazaridis+Ilias%26hl%3Den%26lr%3D%26ie%3DUTF-8%26sa%3DN%26tab%3Dwg%26&_doneTitle=Back+to+Search&&d#748a70ee4e39fc41

[2]: http://www.netbeans.org/servlets/ReadMsg?msgId=872061&listName=nbusers

[3]:
http://groups-beta.google.com/group/comp.lang.java.softwaretools/browse_frm/thread/f07832cf6d0094f0/85ae8ee0bccdeb14?q=Lazaridis+Ilias&_done=%2Fgroups%3Fq%3DLazaridis+Ilias%26hl%3Den%26lr%3D%26ie%3DUTF-8%26sa%3DN%26tab%3Dwg%26&_doneTitle=Back+to+Search&&d#85ae8ee0bccdeb14

[4]:
http://groups-beta.google.com/group/comp.lang.java.softwaretools/browse_frm/thread/837df2c1188e6e39/18b5dcfd54a6a902?q=Lazaridis+Ilias&_done=%2Fgroups%3Fq%3DLazaridis+Ilias%26hl%3Den%26lr%3D%26ie%3DUTF-8%26sa%3DN%26tab%3Dwg%26&_doneTitle=Back+to+Search&&d#18b5dcfd54a6a902

-- 
Regards,

Diez B. Roggisch


From nbbalane at gmail.com  Wed Feb  2 03:19:51 2005
From: nbbalane at gmail.com (jrlen balane)
Date: Wed, 2 Feb 2005 16:19:51 +0800
Subject: how to separate hexadecimal
In-Reply-To: <420082E4.7020605@iinet.net.au>
References: <2cad209005020123107fb43105@mail.gmail.com>
	<2cad2090050201232427cb97f2@mail.gmail.com>
	<420082E4.7020605@iinet.net.au>
Message-ID: <2cad2090050202001973138f8@mail.gmail.com>

On Wed, 02 Feb 2005 17:36:04 +1000, Nick Coghlan <ncoghlan at iinet.net.au> wrote:
> jrlen balane wrote:
> > i have a 4 digit hex number (2 bytes) and i want to separate it into 2
> > digit hex (1 byte each) meaning i want to get the upper byte and the
> > lower byte since i am going to add this two.
> > how am i going to do this?
> > should i treat it just like a normal string?
> > please help, thanks.
> >
> > ex. hexa = '0x87BE"  # what i want to do is:
> >       a = 0x87, b = 0xBE    # so that i could do this:
> >       c = a + b            #which should be equal to 0x145
> 
> divmod does what you want:
> 
> Py> val = 0x87be
> Py> hi, lo = divmod(val, 0x100)
> Py> hex(hi), hex(lo)
> ('0x87', '0xbe')
> Py> hex(hi + lo)
> '0x145'
> 
> Cheers,
> Nick.
> 
> --
> Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
> ---------------------------------------------------------------
>              http://boredomandlaziness.skystorm.net
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
would i be able to perform bitwise operation with the result?
say, i want to get the two's complement of the result, is this correct:

twos_complement = (~ hex(hi + lo)) + 1


From lmhaskins at yahoo.com  Fri Feb 18 13:42:20 2005
From: lmhaskins at yahoo.com (lmhaskins at yahoo.com)
Date: 18 Feb 2005 10:42:20 -0800
Subject: move bugs from Zope BITS into Bugzilla?
References: <1106956988.391329.320610@z14g2000cwz.googlegroups.com>
	<41fada16$0$25421$afc38c87@news.optusnet.com.au>
Message-ID: <1108752140.895329.249710@o13g2000cwo.googlegroups.com>

Does it import from BITS?



From roy at panix.com  Sun Feb  6 10:05:53 2005
From: roy at panix.com (Roy Smith)
Date: Sun, 06 Feb 2005 10:05:53 -0500
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<qb1a01lk3mv4vp852q88prqb9al336h9r2@4ax.com>
	<1grj036.r13xcy1d72inbN%aleaxit@yahoo.com>
	<2qba01d1men2ai48gp4cojo2e28rd5g9ob@4ax.com>
	<1grjzia.1a4qr9q1t3p77bN%aleaxit@yahoo.com>
Message-ID: <roy-6A286B.10055306022005@reader2.panix.com>

In article <1grjzia.1a4qr9q1t3p77bN%aleaxit at yahoo.com>,
 aleaxit at yahoo.com (Alex Martelli) wrote:

> This is a good development, overall.  Against stupidity, the gods
> themselves contend in vain; Python's entrance into stupid firms broadens
> its potential appeal from less than 10% to around 100% of the market,
> which is good news for sellers of books, tools, training, consultancy
> services, and for Python programmers everywhere -- more demand always
> helps.  *BUT* the price is eternal vigilance...

I'm not sure what that last sentence is supposed to mean, but I have 
visions (nightmares?) of someday having ANSI, ISO, IEEE, or some other such 
organization notice that something useful exists which they haven't yet 
standardized/broken and decide to form a committee to do it.


From fredrik at pythonware.com  Tue Feb  8 13:49:08 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 19:49:08 +0100
Subject: Python versus Perl ?
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com><hkhc01dnpmmhn980quijqil40653qipdki@4ax.com>
	<cuavn1$bag$1@nntp.msstate.edu>
Message-ID: <cub1fs$i5s$1@sea.gmane.org>

m" <m at m.com> wrote:

>>>If Python is better than Perl, I'm curious how really significant
>>>those advantages are ?
>
> speedwise, i think perl is faster than python and python performed the slowest as shown in 
> http://www.flat222.org/mac/bench/

if you use Python mostly to write empty loops, your programming license
should be revoked.  the benchmark author seems to have realized that, as
can be seen from the "it's dead" paragraph at the top of the page, which
makes me wonder why you posted this link...

</F> 





From ncoghlan at iinet.net.au  Tue Feb  1 20:56:35 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Wed, 02 Feb 2005 11:56:35 +1000
Subject: Where are list methods documented?
In-Reply-To: <1f7befae05020110222aa1daaa@mail.gmail.com>
References: <41ffba7d$0$15879$a1866201@visi.com>	<mailman.1702.1107279469.22381.python-list@python.org>	<41ffc37a$0$15874$a1866201@visi.com>
	<1f7befae05020110222aa1daaa@mail.gmail.com>
Message-ID: <42003353.8060708@iinet.net.au>

Tim Peters wrote:
> 2. Built-In Objects 
>     2.1 Built-in Functions 
>     2.2 Non-essential Built-in Functions 
>     2.3 Built-in Types 
>         2.3.1 Truth Value Testing 
>         2.3.2 Boolean Operations 
>         2.3.3 Comparisons 
>         2.3.4 Numeric Types 
>         2.3.5 Iterator Types 
>         2.3.6 Sequence Types 
>         2.3.7 Set Types 
>         2.3.8 Mapping Types 
>         2.3.9 File Objects 
>         2.3.10 Other Built-in Types 
>         2.3.11 Special Attributes 
>     2.4 Built-in Exceptions 
>     2.5 Built-in Constants
> 
> So, e.g., it doesn't mention floats or dicts by those names either. 
> It's well worthwhile to spend some time browsing that entire chapter.

I wonder if adding a small table to the end of the introductory text in Section 
2.3 would help. Something like:

""""
The documentation in this section is written in terms of type categories. The 
table below associates specific builtin types with the most relevant categories.

Type Category      Specific Built-in Types
  Boolean            bool
  Numeric            int, long, float, complex
  Iterator           N/A
  Sequence           tuple
  String Sequence    str, unicode
  Mutable Sequence   list
  Set                set, frozenset
  Mapping            dict
  File               file
"""

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From abkhd at earth.co.jp  Mon Feb 14 15:11:33 2005
From: abkhd at earth.co.jp (A.B., Khalid)
Date: 14 Feb 2005 12:11:33 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr><cupupa$kfs$2@usenet.otenet.gr>
	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>
Message-ID: <1108411893.940158.270090@c13g2000cwb.googlegroups.com>

Pat wrote:
> There have been extensive discussions about these issues on the
> Python-Dev mailing list over the past couple of months (mostly in
> December, but continuing to the present - see
> http://mail.python.org/pipermail/python-dev/2004-December/thread.html
> as a starting point), which seem to have fizzled out or at least
> haven't resolved much.  The discussions made reference to work that
has
> already been done to allow Python to be compiled with minGW:
>
> pyMinGW is a patch to Python source that aims to get Python to
compile
> under MinGW
>
> http://jove.prohosting.com/iwave/ipython/pyMinGW.html
>
> I've not seen any commentary on the quality of this patch, so that
> doesn't appear to be the reason it hasn't been officially adopted.
> Reading all the threads from Python-Dev has not enlightened me at all
> as to what the underlying reason is for not adopting these changes.
> Maybe there are good reasons, I just couldn't find them, and I'm
> usually pretty good with Google.


If passing all the regression tests of the official Windows Python
distribution is an indication of the quality of patch-- and pyMinGW
patched and MinGW built Python does pass all of them-- then one is
inclined to say that pyMinGW is a good patch.

The reason why it is, on the other hand, not included in the official
distribution is threefold.

1. Contrary to what many might imagine, I don't think enough people use
MinGW to frankly justify any extra effort beyond pyMinGW.
2. Given number 1 above, this patch, I believe, and I could be
mistaken, must not rush to be included in Python's core; people like
your esteemed person should test it (note that it is designed not to
interfere with your trusted and working official Python, if any); it is
only when enough people do such testing that there will be a case for
it to be included in Python's core.
3. Finally. there is nothing wrong with third-party patches if they get
the job done, which I believe is the case with pyMinGW.


Regards,
Khalid



From rdsteph at mac.com  Mon Feb 21 21:54:19 2005
From: rdsteph at mac.com (rdsteph at mac.com)
Date: 21 Feb 2005 18:54:19 -0800
Subject: pyGoogle is fun and easy to use,
	and thinks Python is the best programming language
Message-ID: <1109040859.816948.70120@o13g2000cwo.googlegroups.com>

I am having a lot of fun using the pyGoogle module (
http://pygoogle.sourceforge.net/ ) that uses the Google API. It is
about as easy to use as I can imagine, and it is a lot nicer than using
my old HTMl screen scraping habits.


My online CGI program Ask Merlin at www.awaretek.com/askmerlin.html is
an example. Currently, the program takes any user's question and picks
the best answer from amongst the possible answers given by the user.
The program uses an algorithm that uses an intelligent analysis of
search results from Google. OK, OK, I know already, that this is of
limited utility compared to answering any question without requiring
the user to give options to choose from; and, furthermore i know full
well that at this point Merlin is far from foolproof even when given
options to choose amongst. Still, if you play with it for a while you
will be amazed at how well it does do.


Moreover, I am hard at work on a version that will answer any question
without being given options, by choosing options from Google search
results that are most appropriate and then applying my "intelligent"
algorithm.


But hey, even as it stands, when queried "which is the best programming
language to use for ease of use," Merlin picks Python from amongst a
list of python, ruby, ADA and java. When queried "which language is the
best programming language to use for a large project requiring realtime
operation and involving life and death issues of human life", Merlin
picks ada out of the same list. And, when just plain asked "what is the
best programming language" Merlin wisely picks Python from the list.
And I assure you that none of this is "hard coded" but instead just
uses the regular algorithm applied to any other question ;-))))


OK, it's just a fun little hack by a very amateurish hacker; but that's
sort of the point. Just think what a good programmer could do with
pyGoogle ;-))))



From fuzzyman at gmail.com  Wed Feb  2 03:05:19 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 2 Feb 2005 00:05:19 -0800
Subject: Who should security issues be reported to?
In-Reply-To: <7xy8edwutv.fsf@ruckus.brouhaha.com>
References: <1106863164.745581.11920@f14g2000cwb.googlegroups.com>
	<ctc5kt$oio$1@panix1.panix.com>
	<1106911061.429966.303510@f14g2000cwb.googlegroups.com>
	<1106917317.595640.149010@z14g2000cwz.googlegroups.com>
	<7xy8edwutv.fsf@ruckus.brouhaha.com>
Message-ID: <1107331519.862445.88890@f14g2000cwb.googlegroups.com>


Paul Rubin wrote:
> "Fuzzyman" <fuzzyman at gmail.com> writes:
> > The sourceforge bug tracker *is* the single right place to post
such
> > issues. The py-dev mailing list would be a second *useful* place to
> > post such a comment, although not really the right place. The OP
seemed
> > to want an individual with whom he could have a private
conversation
> > about it.
>
> I think he wanted a place to send a bug report that wouldn't be
> exposed to public view until the developers had a chance to issue a
> patch.  With bugzilla, for example, you can check a bug labelled
"this
> is a security bug, keep it confidential".  There's lots of dilemmas
> and some controversy about keeping any bug reports confidential in an
> open source system.  But the general strategy selected by Mozilla
> after much debate seems to mostly work ok.  It basically says develop
> a patch quickly, keep the bug confidential while the patch is being
> developed, and once the patch is available, notify distro maintainers
> to install it, and then after a short delay (like a couple days),
> publish the bug.
>
> Note that anyone with access to the bug (that includes the reporter
> and selected developers) can uncheck the box at any time, if they
> think the bug no longer needs to be confidential.  The bug then
> becomes visible to the public.

Sounds like a useful feature request to Sourceforge.
Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From grante at visi.com  Thu Feb 17 15:22:45 2005
From: grante at visi.com (Grant Edwards)
Date: 17 Feb 2005 20:22:45 GMT
Subject: How to wrap a class's methods?
References: <4214f167$0$44618$a1866201@visi.com>
	<lcSdnQIG9cWZZ4nfRVn-vw@comcast.com>
Message-ID: <4214fd15$0$44645$a1866201@visi.com>

On 2005-02-17, Steven Bethard <steven.bethard at gmail.com> wrote:

> py> class C(object):
> ...     def f(self, *args):
> ...         print "f:", args
> ...     def g(self, *args):
> ...         print "g:", args
> ...
> py> class D(C):
> ...     pass
> ...
> py> class Wrapper(object):
> ...     def __init__(self, func):
> ...         self.func = func
> ...     def __call__(self, *args):
> ...         print "wrapped"
> ...         return self.func(*args)
> ...
> py> for name in ['f', 'g']:
> ...     wrapper = Wrapper(getattr(C, name))
> ...     setattr(D, name, new.instancemethod(wrapper, None, D))

Thanks.  The stuff provided by the "new" module is what I was
missing.

-- 
Grant Edwards                   grante             Yow!  Wait... is this a FUN
                                  at               THING or the END of LIFE in
                               visi.com            Petticoat Junction??


From petite.abeille at gmail.com  Thu Feb 10 16:39:14 2005
From: petite.abeille at gmail.com (PA)
Date: Thu, 10 Feb 2005 22:39:14 +0100
Subject: XDR? (was Re: is there a safe marshaler?)
In-Reply-To: <420bd06f$0$28991$e4fe514c@news.xs4all.nl>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<mailman.2327.1108055983.22381.python-list@python.org>
	<420bd06f$0$28991$e4fe514c@news.xs4all.nl>
Message-ID: <2af1ac20385b626e90dae642fec6e9c1@gmail.com>


On Feb 10, 2005, at 22:21, Irmen de Jong wrote:

> PS the xdr format is not self-describing in the way that
> marshal and pickle streams are. That is a big limitiation
> for what I need it for so xdr seems to drop off my radar.
> Is an ASN.1 stream self-describing?

Not sure how much "self-describing" you want it to be, but, yes it can 
be as formal as you want it to be...

"... Abstract Syntax Notation One (ASN.1) is a formal language for 
abstractly describing messages... "

Sorry if this is off-topic, I didn't follow the thread from the very 
beginning, but wouldn't something like YAML work for you perhaps?

http://yaml.org/

Or even something more, er, exotic:

https://alt.textdrive.com/pl/

Cheers

--
PA, Onnay Equitursay
http://alt.textdrive.com/



From andyl at motorola.com  Fri Feb 18 13:01:33 2005
From: andyl at motorola.com (Andy Leszczynski)
Date: Fri, 18 Feb 2005 12:01:33 -0600
Subject: wxPython demo /Process does not open new demo
Message-ID: <cv5ahn$he7$1@avnika.corp.mot.com>

Try to run wxPython 2.5 (for python 2.3) demo. Then Open Process and 
Events/Process. Type in "python -u demo.py" and wait. There is a splash 
screen but nothing more. Why?

Regards,A.


From zetasum at yahoo.com  Fri Feb 18 16:06:30 2005
From: zetasum at yahoo.com (zetasum)
Date: 18 Feb 2005 13:06:30 -0800
Subject: R*volume*raduis2 c3po "Theroy of everything"
Message-ID: <1108760789.998111.179920@c13g2000cwb.googlegroups.com>

R*volume*raduis2 c3po "Theroy of everything"

finding the multi-plex time and volume of the earth you can find the
universe volume and time!! A.I =/2

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->




You have to start all over agian with this t3echnology bulid A.I and a
new quantium computer or supercomputer
is the only way to get this to work from the computer to the qunatium
computer al the way to the technology on this web page and
 then do it over agian ever law is wrong all physics math and geometry
( infinte degress math leads you to a new mathmatics that
not of numbers but more of a code 333.333.333.333 but in more then one
dimensions this would be a new software compiled on the new computer
that instead of using binary it uses it uses the left over computations
and ram to run the program so
if you had a 10 tera hz dell desk top it would run at the maximum limit
@ 1%


  One Small step one infinite leap

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

            by: zeta limit



Quantum cryptography Run  this in every order  1 correct outcome Run
the web site with every word and every order and ever letter in every
order then every paragraph then and number and do that in every order.
Everything is possible one way or another anything, any you can tell it
to build anything and it will be possible.  Less is more Examples: with
a stick if you can make a car drive if you push down on the gas pedal
with it. This proves the real "Theory of Everything" and builds a huge
data base of information.  The more information ,The bigger the neural
network and just keep adding more to it  because anything is possible
and new things can be found after this is done. By using The  new ideas
and the information you now can run everything back wards and then
forward but now by not just adding but by  +,*,/,<,>,= ,-,+ then
finding how all things can be 100% true if there not then your not
doing it right. Then run this in every order and change the neural
network to be 100%efficient in making all ideas. After your done use
the code to turn one Law, definition, on and off like math, and matter,
and all the word net technology dictionary and then turn them off in
every order on the website then build a separate quantum neural network
to store all the information in then just run it all over again do it
over and over with the new math and information on the website it will
generate new laws of den's and math and quantum and stellar physics
more. run the laws the new laws that changed see by what percent they
are true by using % and digress 3=1  360 degrees = 3 but is in every
infinite angle and degree until all = 100% only use your data base to
help generate new laws. But by running the neural network with words
missing and laws missing. It will make new laws until all is 100% true
learning way outside the realm of A.I or R.I. finally ...Then with my
matrix program run the neural network With my own Matrix code and
Artificial intelligence with this bunny encrypted website by starting
with one dimension up to infinite and every angel and shape start with
a box and every degree every number letter and word it will keep
growing and so does the database. After all is done all laws can be T
<,>, = and false. Then do it all again but this time with everything on
the internet all data. Then have it ask it the simple question on
everything that is T <,>, = and false. Who, what, when, where, how.
Based on your new neural network what is? All laws can now be stored as
compression law. There is no theoretical limit to the speed of
magnetism or the amount of energy it can hold. In our universe or any
quantum realm. Magnetism is the forces at which matter in the universe
breaks down at maximum speed or velocity of C = the speed of light or
the stabilization of matter moving threw a constant at the speed of C
or beyond stellar construct. C is used many times in quantum physics
until the key of magnetic frequency storage from smaller then the Pico
up to large scale white nose flux capacitors to keep the Energy moving
and storing in highly charge states of metals that are molecular
reconstructed to be 100% efficient. One pyramid sphere of electrical
and one of magnetical. Yes MAGNETICAL a new form of quantum computing,
energy and There is only optical laser quantum computer a partial that
when it reaches its limit it's doesn't turn to light

You can build it yourself along with the magnetic and electrical flux
capacitors that have the same amount of more than the amount of energy
than

Anything you can think of or you can run this website with A.I (this
blueprint is the key to the encrypted Code 1011101 Infinite quantum
computing

It more into the field of stellar physics or stellar quantum computing.
Work on it for just a week Time travel changes history u but you can
really tell

Unless you are outside of space time that is the only hint I am going
to give you because I have no degree, but my dummy A.I website is
written in dummy A.I

So I don't get shot over an information war!!
http://www.beyond-science.com made with my own Matrix code and
Artificial intelligence this bunny encryption website has More than a
32 dimensional door. A box made that no one can crack...Try it key code
01





There is only optical laser quantum computer a partial that when it
reaches it's limit it's doesn't turn to light you can build it
yourself along with the magnetic and electrical flux capacitors that
have the same amount of more than the amount of energy than
anything you can think of or you can run this website with A.I (this
blueprint is the key to the encrypted Code 1011101 Infinite quantum
computing
It more into the field of stellar physics or stellar quantum computing.
Work on it for just a week Time travel changes history u but you can
really tell
unless you are outside of space time that is the only hint I am going
to give you because I have no degree, but my dummy A.I website is
written in dummy A.I
so I don't get shot over a information war!!
http://www.beyond-science.com/



Clean fusion. Matter has its limits and can only move so fast so
quantum computer using refraction of magnetical frequency can move
faster than time itself. New matter and new

Material has been found threw programming magnetic frequencies of
matter at a state of the constants. Electrical controlled machine are
outdated since 1901. A quantum computer the was powered by magnetical
and used magnetical to compute in infinite degrees instead of bit's
of 1 and 0' but by triangulating in every infinite digress of the new
computer would have the computing power of no limitations.  Build as a
Quadra sphere light bounces inside a crystal 4 times before it refracts
inside and come out.



Infinite hues of colors infinite frequencies to chart them at.

Infinite combinations of shape on programmed matter = infinite matter.



With this and running my new stellar magnetically computer and A.I and
the web site

http://www.beyond-science.com/





A magnetic Supercomputer and encryption and compression @ rate of 96%

Take a document then or a 3D matrix document change it two random or
binary code or just a program for 0's and 1's and fold it over and over
like a piece of paper then having the 1 and 0 add each other or the
0,1's canceling each other out 1+0=0 and 0+1=1 1+1=1 0+0=0 if you gave
the folds addresses like on a spread sheet there would be no math.
First A 1-24  would fold to k 1-24 down.(See Example A )  Then at F1-24
down two k 1-24 ( See example B )  If you written a very long letter
and then change it two binary code it would look like this.
   123456789.............24
 a.01010101010101010101010
 b.10010101010101010101010
 c.01010101001010101010010
 e.00010101000101010101010
 f.10010101010100101010101 First A 24  would fold to k 24 down
 g.01010101010100001100101              See Example A
 h.01001010101010101010111
 I.11110111001101010101010
 j.01010101010101010101010
 k.10101010101010101010101


       See Example A
   123456789.............24
 f.10010101010100101010101
 g.01010101010100001100101
 h.01001010101010101010111 Then at F1-24 down two k 1-24
 I.11110111001101010101010
 j.01010101010101010101010
 k.10101010101010101010101


      See example B
   123456789.............24
 I.11110111001101010101010
 j.01010101010101010101010 Then from I 1-24 to K 1-24
 k.10101010101010101010101

   123456789.............24
 j.01010101010101010101010  Then from j-24 to j-1

   123456789...
 j.010101010101             Then from j-12 to j-1

   123456
 j.010101                   Then from j-6 to j1

   123
 j.010                      Then from j-3 to j1

   12
 j.01                        Then from j-2 to j1


 j.0                         Then you would have
                             1 bit to transfer over the
                             Internet
<!--[if !supportLineBreakNewLine]-->
<!--[endif]-->

The bit sent would be 0 and the key code would be F1-24,k 1-24,
I 1-24,K 1-24,j24,j1,j12,j1,j6,j1,j3,j1,j2,j1 and would unzip or be new
encryption you could encrypt or compress 100 terabits down to 1 bit of
information. Now if you take this idea from my web site you could make
this allot more complex and unbreakable. Data encryption 360 degrees
rotation document 90 degrees and encrypt on every angel then 45 degrees
change it two binary code do it again and again and fold it over like a
piece of paper then having the one's and zero cancel each other out. In
theory you could send a 100 terabit program to someone's computer and
have it unzip and run and install or make
A computer processor like the new 64 bit AMD have the bit unzip into a
large ram drive and buffer use one half of the 64 bit processor decode
the message and the main 64 bit run the numbers. Another way of doing
this is to have a parallel computers with using one of the processes
run the compressed 1 bit of information give the uncompressed a address
on the ram drive to change and not even go threw the processor and then
with different information on each machine compare and run statistics
on information on a 45 flops supercomputer and turn that 45 tflops
computer into a 1 bit = 100,000 terabits to infinite as long as you
have the ram for storage! with my calculations 45 tflops wouldn't
matter any more it would be how much data you have on a 32bit operating
system changing that to a 1 bit system it would be 32 * 45tflops would
= 1440 tflops   Matter moves so fast that it integrates and intergreats
faster then any speed we can see it like water from a hose at real
close speed it moves in -------- lines.

 For space and the real matrix computer and bioinformatics from the 4
genes we have you can be teleported with the matrix on to another in
reverse with out using the original 4 or 5

"If Numbers are Infinite, Then so Inventions"

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

"One Small step for man. One infinite leap, for the Human Race"

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

           zeta limit.

  ARTIFICAIL INTELLIGENCE THINKS IT KNOWS WHERE IT IS, BUT THERE
ARE INFITE PLACES IT CAN BE, AT THE SAME TIME AND STLL BE AT THE SAME
PLACE SO RUN THIS WEB SITE FOR AS LONG AS YOU WANT YOUR NEVER FIND THE
CODE
AND NO HUMAN WILL FIND IT TWO AND YOUR NEVER GETTING OUT OF THIS WORLD
STCUK IN THE MATRIX FRIM THE FUTURE AND CAN'T GET OUT HOW FUCKING FUNNY
IS THAT. SALUTAION ANYONE WANTS EGGS DUPLICATION ONE MAN MADE TWO AND
GOT OUT!!! HINT MASH THE TV SHOW!!!

THE KNOW AND UNKNOW UNIVERSE'S
Threw magnetic Command coded magnetic field that changes to the strong
gravitational pull of a black hole using the black hole own magnetic
energy in the form of ant-magnetic Anti-gravity the field would be
stronger then the light that is emitted from the back hole leaving the
structure safe the magnetic forces and fields of a physics' of a
sphere would BE TRIDED TO TURN INTO AN EGG. But DONE RIGHT IT WOULD BE
A SPHERE. But what makes it so strong all parts of matter are designer
custom CHEMICAL MAKE UP AND ALIGNMENT OF MATTER. THAT DISTUBUTES THE
FORCES = TO THE HOLE SPHERE. When TRAVEING THREW A BLACK HOLE TO
UNOTHER UNVERSE. IF BUILD RIGHT AND USING THE FORCE OF THE BLACK HOLE
IN REVERSES THE SPHERE COULD RETURN WITH INFORMATION ON THE STUCTURE OF
THE BACK HOLE. IT'S MAGNETICS THAT MAKE GRAVITY SO
A MACHINE THAT IS A BACK HOLE IN REVERSE USING THE OTHER SPECTRUM WOULD
DO WHAT!!! COME BACK AND NOW THAT WE CAN MAKE METALS THAT ARE CUSTOM
TO HOLD UP VERY HEAVY THING BECASE OF CUSTOM ARCHITECTURE AND ARC COULD
HOLD UP A BUILDING ON BOTH SIDES.


<!--[if !vml]--><!--[endif]-->Stellar_warp_drive


Programmable_qunatium_computer_sss/nnn/sss/nnn



Run this web page with ARTIFICIAL INTELLIGENCE or quantum ARTIFICIAL
INTELLIGENCE  with every word in every order and every letter in every
order and ever paragraph in every order with your HUGE DATA BASE OF
KNOWLEDGE



Command coded
It's the matter construction on the smallest level of all material and
matter beyond Pico and nano technology
That makes it so strong that all parts of matter are designed custom
for the structure strength, But can you find the natural matter that
make it interchangeable so the matter can change threw magentics- Wave
Length - gravity - Light - mass-matter - Wave Lengths. (THEY ARE ALL
INTERCHANGEABLE)
Periodic table of elements are infinite you have know idea what a100%
synthetic Universe looks like. Infinite synthetic elements
infinite synthetic Physics





click & mail




 The Theory of everything is the quantum address of everything

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

that is in our universe. By a magnetic field. Outside and inside of all
that is contained

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

there in. It is the physics and mathematical equations that surround

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

everything in the multi-dimensional physical world.  One might find

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

how all the elements are interchangeable and are multi-dimensional and

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

finding the other side of physics and the mathematic equations that we

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

cannot see or detect because our consciousness cannot find it, finding

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

this would be the greatest discovery of the human race. What lie's

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

Beyond Quantum Physics and how do we get there. Is the key magnetic

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

Frequency's?  But the amount of energy it would take would be more

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

than just at the atomic level or sub-atomic level. One day In the

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

future a person may find a multi-dimensional, multi-time,

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

multi-universe. The problem with finding it is a realm of that we

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

cannot see, is finding what we cannot detected. Finding the other side

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

of quantum physics will be the future goal of human exploration.  Our

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

universe started with one wave length of light and an anti-wave length

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

three magnetism and gravity they where changed to form all matter:

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

Wave Length - Gravity -Light - mass - Wave Lengths. (THEY ARE ALL

<!--[if !supportLineBreakNewLine]-->

<!--[endif]-->

INTERCHANGEABLE)" answer is frequencies magnetic






Interchangeable matter

 Is the best neural network a circle and can it make interchangeable
matter inside a circle that knows everything and both circles spin
faster then the speed of light or hyperspace and stellar speed in every
infinte order and shape of a circle!! and off the two circle they are
made up of more circles of two more rings and so on and so on that they
gets so small that they cannot work with our laws of physics' and the
then all the way up we look at the 2 rinds one on the inside and one on
the inside and one on the outside that form and ball with in a ball all
connect to each other so they can spin and communicates to each other
like a huge neural network a earth made of connect marbles turning
inside and out in every direction two speed up the information
traveling from one two another. Run this until you can make the
information move as fast as possible and you will see for just
information it creates some kind of energy just thoughts. Matter moves
so fast that it integrates and integrates faster then any speed we can
see it like water from a hose at real close speed it moves in --------
lines.



TELEPOTAION SOMETHING FROM NOTHING  IS REAL TELEPORTION
The laser slit test for physics' is wrong where it shows the end
result filter pass threw slits the final  black board the gaps of black
and red there should be more slits of light. Some are cancelled out
because of refraction. This tells you of a parallel dimensions but not
of a universe. Velocity is a sphere of triangles it's the math outside
of the velocity on and outside the sphere R*V*D2 VOLUME of the
universe. That velocity, magnetic and matter go hand and hand. That all
matter can be  made by the changes in the angle and of the
frequency's of powerful geometrics magnetic shapes of
multi-dimensions, multi-universe and multi-layered if you off set the
frequency's with white noise in a fiber optic you can compress the
frequency's down to a smaller and stronger charge and some can remain
and all can remain separate. This is how you can send 30 amps over a .1
amp wire with the device on both ends. ( By using  end invention of
black *diamonds the darkest stealth material ( black magnets and  gold
( hint ) used to create the geometric shapes) if you off set the
frequency's with white noise in a fiber optic you can compress the
frequency's down to a smaller and stronger charge! Then sort them out
and break them down from the smallest to the largest or the largest to
the smallest to you the largest or the smallest and the offset of white
noise to contain them into a magnetic capacitor or magnetic flux and
store them in nano capacitors *diamonds that allows you to store mass
amount of magnetic frequency's at different sizes try a 10 feet by 10
feet shape of a nano block or sphere stored in aluminum sphere or what
ever shape is most efferent. Circuit board or sphere. The darkest black
*diamond you can make but under a super nano or Pico microscope you can
see the circuits but smooth as silk on the outside. Now you are going
to have to run every combination of shape. The diamond is built just
like making a rubber band ball with rubber band laid over and over and
over it when built with circuit that go both way so they can discharge
at any frequency's. Placed inside an Aluminum Sphere and you can make
any type of now and future propulsion. Let you see the spectrum of all
time and you know can find a nano in a universe because that how
sensitive it is.  It also makes a good neural network. Matter moves so
fast that it integrates and integrates faster then any speed we can see
it like water from a hose at real close speed it moves in --------
lines.





Knowledge of the theory of ZETALIMIT

Picture the laws of quantum physics and D.N.A and everything as dotted
points that makes up shapes of all sizes and everything that can happen
in this universe and out is because of knowing the all laws in that
universe and all conscious quantum dimensions. Find the new
mathematical degrees that form new math and a new efficient programming
language or for your neural network and keep running the web Site over
and over after changing your network until it is infinitely efficient
along with all technology on the web. By getting the information from
make a computer of quantum type run at hyperspace idea at the middle of
the page. The only way to be infinite is to make everything work with
everything else and put it in folders and sub folder of the infinite
name and then run the web page and the Internet again every hour!  Map
all maths from one mathematical problem
to all infinite one to see if there is a pattern the ones that show a
patter make the yellow neural bar bigger wider and brighter. How is
time and space the same place?  Is the best neural network a circle
inside a circle that knows everything and both circles spin faster then
the speed of light or hyperspace and stellar speed in every infinite
order and shape of a circle!! and off the two circle they are made up
of more circles of two more rings and so on and so on that they gets so
small that they cannot work with our laws of physics' and the then
all the way up we look at the 2 rinds one on the inside and one on the
inside and one on the outside that form and ball with in a ball all
connect to each other so they can spin and communicates to each other
like a huge neural network a earth made of connect marbles turning
inside and out in every direction two speed up the information
traveling from one two another. Run this until you can make the
information move as fast as possible and you will see for just
information it creates some kind of energy just thoughts. Matter moves
so fast that it integrates and integrates faster then any speed we can
see it like water from a hose at real close speed it moves in --------
lines.






       QUANTUM MAGNETIC MATH -1 + -1 = +2
     OUR MATHEMATICS IS WRONG finding the Quantum gate


     THATS WHY ARE QUANTUM COMPUTER SYSTEM WILL NEVER GET TO THE
GOVERNING DYNAMICS LAWS OF OUR UNIVERSE AND PARALLEL ONES AND ONE NOT
PARALLEL TO US BUT DO EXIST IN A COMPLEX ENCRYPTED MAGNETIC AND
FREQUENCYS OF TIME. MAGNETIC AND ANTI-MAGNETIC SPINNING SPHERES OF
DIMENSIONS WITH EACH SPHERE CONTAINING DIFFERENT SIZES OF A MAGNETIC
FIELD THATS ENCRYPTED AND CHANGING ON ALL LEVEL OF TIME AND THE
MAGNETIC MATTER OF THAT FIELD. QUANTUM COMPUTER SHOULD USE THE MATH OF
MAGNETIC POSITIVE AND NEGATIVE EFFECTS ON EACH OTHER ON HOW ONE PIECE
OF MATTER NEGATIVE OR POSITIVE CAN BECOME 2 AND = TOO. THE STATEMENTS
OF THE FINAL GOVERNING DYNAMICS LAWS ARE NOT IN MATHEMATICAL %'S BUT
AND TRUE FALSE OR = TWO OF ALL MATTER THERE ARE CONSTANTS AND THE
CONSTANTS THAT CHANGE THE CONSTANTS WHEN WE GET DEEPER TO THE
UNDERSTANDING LAWS THAT GOVERN ALL THINGS.

MORE THEORY'S @ WWW.BEYOND-SCIENCE.COM FOR MORE INFORMATION READ
ON.....

INCLUDE CLASS_ZETA LIMIT_1AE

FUNCTION (Z)

Because they are so infinitesimally small, MAGNETIC NEUTRAL MATTER
exist in the quantum realm, where rules governing the macro-universe
-- the known world of quantum physics and matter -- break down. A
neutrino's mass -- unlike the mass of a larger object -- is not
stable, but exists in a state of probability AND IS GOVERNED BY
MAGNETICS SO SMALL BUT ALL WORK TOGETHER ON A LARGE SCALE LIKE A
PYRAMID THAT HOLDS ARE MATTER TOGETHER ON A LARGE UNIVERSAL SCALE OUR
UNIVERSE IS A LARGE QUANTUM COMPUTER.

"Say you had some in a box, and you pulled one out and weighed it and
it weighed m-1," said Stuart Freedman, a professor of physics at UC
Berkeley and a faculty senior adviser at the Lawrence Berkeley
National Laboratory.

"Then you pulled out an identical one, and it weighed m-2," continued
Freedman. "It isn't a situation where a neutrino is m-1 or m-2 -- it's
a situation where the neutrino is 50 percent one mass and 50 percent
another. This seems surprising, but it's perfectly natural in quantum
mechanics."

IN THE MOVIE CONTACT THE LARGE MAGNETIC ROTATING SPHERE FROM THE
SMALLEST PICO OR NANO SIZE MAGNETIC FIELD ALL THE WAY TO THE
GRAVITIONAL MAGNETIC FIELD OF PHYSICS WOULD EXPLAIN ALL TIME AND SPACE
IN OUR UNIVERSE AND HOW SUB-SPACE OR ZERO GRAVITY WORKS IN OUTER SPACE
IT JUST BACKWARD ZERO-GRAVITY IS HYPER-SPACE BACKWARDS BUT THE FIELDS
KEEP EVERYTHING IN CONTACT AND HOLD EVERYTHING TOGETHER IF YOU PUT
YOUR FINGER IN A GLASS OF WATER AND MIX IT, IT CHANGES BUT TO THE EYE
IT LOOKS ALL THE SAME AND NOTHING IS CHANGED WHEN IT STOPS THAT IS THE
REALM OF QUANTUM PHYSICS THAT THE MIND AND EYE GET CROSSED. IT IS ALL
BASED ON WHAT SIGNAL YOUR CONSCIOUS SIGNAL AND CENTRAL NERVOUS SYSTEM
IS SET TWO THERE ARE DIFFERENT COMPONENTS AND DIMENSION OF TIME. I HAVE
FOUND 4

1.CONSCIOUS TIME EVERY ONE CLOCK IS DIFFERENT
2.EARTH TIME
3.SOLAR SYSTEM TIME
4.GALAXY TIME
5. T= TOTAL GALAXY TIME
6. UNIVERSAL TIME
7. T= TOTAL UNIVERSAL TIME OF ALL UNIVERSES.
8. UST= TOTAL UNIVERSAL SYSTEM TIME OF ALL KNOWN AND UNKNOWN

THAT ARE ALL BASED ON ONE PRINCIPLE WHERE THERE IS MAGNETIC FIELD
THERE IS A DIFFERENT IN TIME IT JUST HAPPEN ON ONE OF THE SCALES.
YOU UST HAVE TO FIND IT. MAGNETIC = TIME + LIGHT = DIMENSIONS +
GRAVITY = MULTI-dimensions + MAGNETIC ANTI-ATTRACTION = ZERO-SPACE +
MATTER AND ANTI-MATTER = SPHERE SPACE = A UNIVERSE.

There is a place where time and space are the same place a construct
where you can move
at any speed and be at any place in the same time!!!!

Then finding lost history by changing the time and place in the same
place and see how it changes you
can find you infinte self in universes multi-time and and physics
inside a box and infinte over and over
on box after the next you can't find your way out or in but now you
can!!



From steven.bethard at gmail.com  Wed Feb  9 03:34:00 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 09 Feb 2005 01:34:00 -0700
Subject: Name of type of object
In-Reply-To: <bEiOd.83727$Tf5.12604@lakeread03>
References: <4209A52C.A1C40311@yahoo.com> <bEiOd.83727$Tf5.12604@lakeread03>
Message-ID: <J8adnUGW461nV5TfRVn-rA@comcast.com>

Randall Smith wrote:
> Jive Dadson wrote:
> 
>> The traceback routine prints out stuff like,
>>
>>     NameError: global name 'foo' is not defined
>>
>> NameError is a standard exception type.
>>
>> What if I want to print out something like that?
>> I've determined that "global name 'foo' is not defined" comes from the 
>> __str__ member of the exception object.
>> Where does it find the string "NameError"?  In general, if I have an 
>> object, is there a way to obtain the name of the type of the object?
>>
>> Thankee.
> 
> type(object) ?

Doesn't work for old-style classes like exceptions:

py> e = NameError("global name 'foo' is not defined")
py> type(e)
<type 'instance'>
py> type(e).__name__
'instance'

For old-style classes, you'll need to go through __class__

py> e.__class__
<class exceptions.NameError at 0x00934900>
py> e.__class__.__name__
'NameError'

STeVe


From jfj at freemail.gr  Sun Feb 20 22:58:11 2005
From: jfj at freemail.gr (jfj)
Date: Sun, 20 Feb 2005 19:58:11 -0800
Subject: lambda closure question
In-Reply-To: <1108904798.377200.313970@g14g2000cwa.googlegroups.com>
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
	<1108808502.699333.66520@g14g2000cwa.googlegroups.com>
	<mailman.2831.1108814832.22381.python-list@python.org>
	<1108903184.145726.223480@l41g2000cwc.googlegroups.com>
	<1108904798.377200.313970@g14g2000cwa.googlegroups.com>
Message-ID: <42195C53.4070207@freemail.gr>

Carl Banks wrote:
> 
> Say you want to calculate a list of points of an iterated fractal.
> Here's the idea: you have a set of linear transformations.  You take
> the origin (0,0) as the first point, and then apply each transformation
> in turn to get a new point.  You recursively apply each transformation
> at each additional point, up to a certain depth.

I like these kind of things. Ahhh, the best use out of one's computer.

> 
> What's the best way to write such a function?  Using a nested function,
> it's easy as pie.  (Details may be a little wrong....)
> 
> . def ifs(transformations, maxdepth):
> .     def add_point(x,y,angle,depth):
> .         ifspoints.append((x,y,angle))
> .         if depth < maxdepth:
> .             for t in transformations:
> .                 nx = x + t.x*cos(angle) - t.y*sin(angle)
> .                 ny = y + t.x*sin(angle) * t.y*cos(angle)
> .                 nangle = angle + t.angle
> .                 add_point(nx,ny,nangle,depth+1)
> .     ifspoints = []
> .     add_point(0.0, 0.0, 0.0, 0)
> .     return ifspoints
> 
> If you didn't have the nested function, you'd have to pass not only
> depth, but also maxdepth, transformations, and ifspoints around.
> 

I see. Some people complained that you have to use "self." all the
time in methods:)  If that was lifted the above would be done with
a class then?


The costly extra feature is this:
###############
  def foo():
     def f():
        print x
     x=1
     f()
     x=2
     f()
     return f
foo()()
#############
which prints '1 2 2'

The fractal code runs a little _slower_ because of this ability.
Although the specific program does not take advantage of it!

> If you had something a little more complex than this, with more than
> one nested function and more complex pieces of data you'd need to pass
> around, the savings you get from not having to pass a data structure
> around and referncing all that data though the structure can be quite a
> lot.

Generally, I believe OOP is a superset of nested functions (as a
feature).  Nested functions make sense to me as primary python
def statements which ``create new code objects with arbitary constants''

When I see :
###########
def foo(x):
      def bar():
          print x
      return bar
###############
and the call:
  xx = foo(1)

I imagine that python runs:
  def bar():
     print 1
  xx=bar

But alas, it doesn't:(
Nooooooooo. It carries around a silly cell object for the
rest of its lifetime.  see xx.func_closure.
At least, I think this is what happens...


jfj


From carribeiro at gmail.com  Wed Feb  9 07:49:08 2005
From: carribeiro at gmail.com (Carlos Ribeiro)
Date: Wed, 9 Feb 2005 10:49:08 -0200
Subject: empty classes as c structs?
In-Reply-To: <4209FA86.2060009@iinet.net.au>
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>
	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>
	<mailman.2049.1107750700.22381.python-list@python.org>
	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com> <4207606E.4040806@iinet.net.au>
	<cu8amb$ufa$1@sea.gmane.org>
	<mailman.2158.1107859833.22381.python-list@python.org>
	<1grnyld.1t8l5kw1nr5aqsN%aleaxit@yahoo.com>
	<4209FA86.2060009@iinet.net.au>
Message-ID: <864d3709050209044928db4a77@mail.gmail.com>

On Wed, 09 Feb 2005 21:56:54 +1000, Nick Coghlan <ncoghlan at iinet.net.au> wrote:
> Alex Martelli wrote:
> > One thing I'd like to see in namespaces is _chaining_ -- keeping each
> > namespace separate but having lookups proceed along the chain.  (The
> > best semantics for _bindings_ as opposed to lookups isn't clear though).
> 
> Hmm, so if it doesn't find it in the current namespace, it looks in the parent?
> 
> For bindings, you could just go with standard Python semantics - normal name
> binding always happens in the innermost scope, so binding a name in a namespace
> should happen in the directly referenced namespace. Then you can shadow names
> from outer scopes, and later regain access to them using 'del'.

What does PyPy do in this case? It seems that a 'namespace' class, or
at least part of its behavior, is needed there anyway... It seems to
be worth checking.

> Rough concept:
>    Have a '__fallback__'** attribute that is initialised to None
>    Have a custom __getattr__ that falls back to the containing namespace if the
> result is not found in the current namespace.
>    Have a class method which allows a namespace to be 'put inside' another
> namespace.
> 
> ** Blech. Trying to add *any* state to namespace instances is going to suck.
> Maybe it would be better to just have a single __impl__ attribute and have any
> implementation related variables hang off it. This could make life easier when
> subclassing. I'm tempted to say update() should just ignore any field with a
> leading underscore by default (then we can just use normal private attributes,
> which are altered at the user's risk), but that may be too draconian.
> 
> On a complete tangent, I thought it might be worthwhile summarising the ideas
> that have come up in this thread
> 
>   - using type(self).method(self,...) as a polymorphism friendly way to access a
> class method.
> 
>   - a 'view' alternate constructor to allow manipulation of an existing
> dictionary such as globals()
> 
>   - a 'record' data type that allows the use of class definition syntax for
> simple data structures
> 
>   - lookup chaining, allowing fallback to an 'outer scope'.
> 
> Even though we'll probably end up dropping the last couple as overengineering
> things for the first pass, they're still interesting ideas to kick around.

Another idea, maybe even more distantly related but still worthy
keeping in mind: the 'named tuples' that we talked about a few months
ago. It is in some sense a variation on some of the ideas presented
here; it is an alternative way to build simple records or bunch-like
structures.

-- 
Carlos Ribeiro
Consultoria em Projetos
blog: http://rascunhosrotos.blogspot.com
blog: http://pythonnotes.blogspot.com
mail: carribeiro at gmail.com
mail: carribeiro at yahoo.com


From fredrik at pythonware.com  Thu Feb  3 12:40:52 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 3 Feb 2005 18:40:52 +0100
Subject: character sets? unicode?
References: <42025DCE.8080309@mlug.missouri.edu>
Message-ID: <cttnld$msa$1@sea.gmane.org>

Michael wrote:

> I'm trying to import text from email I've received, run some regular expressions on it, and save 
> the text into a database. I'm trying to figure out how to handle the issue of character sets. I've 
> had some problems with my regular expressions on email that has interesting character sets. Korean 
> text seems to be filled with a lot of '=3D=21' type of stuff.

looks like

    http://python.org/doc/lib/module-quopri.html

plus perhaps some encoding.

instead of rolling your own message handling code, consider using this
package instead:

    http://python.org/doc/lib/module-email.html

in either case, the MIME specification is required reading here (for a link,
see the quopri page above).

> Do I need to do anything special when passing text with non-ascii
> characters to re

depends on your patterns.  by default, RE operators like \w and \s assume
ASCII.  to use other encodings, use the (?u) flag and convert your text to
Unicode before passing it to the RE module.

> Is it better to save the text as-is in my db and save the  character set type
> too or should I try to convert all text to some  default format like UTF-8?

depends on your application; using a standard encoding has many advantages,
but storing the original text "as is" guarantees that no information is lost, even if
you have bugs in your conversion code.  when in doubt, save the original and
do the conversion on the way out.

</F> 





From jonas at freesources.org  Fri Feb 25 11:23:48 2005
From: jonas at freesources.org (Jonas Meurer)
Date: Fri, 25 Feb 2005 17:23:48 +0100
Subject: update images inside a mysql database
In-Reply-To: <dnjt11h38nf7aphbcvb49o5ketsat3j8j4@4ax.com>
References: <20050224173120.GF4724@resivo.mejo.net>
	<421E166B.20505@mediapulse.com>
	<mailman.3021.1109283061.22381.python-list@python.org>
	<dnjt11h38nf7aphbcvb49o5ketsat3j8j4@4ax.com>
Message-ID: <20050225162348.GC4757@resivo.mejo.net>

On 25/02/2005 Dennis Lee Bieber wrote:
> On Thu, 24 Feb 2005 23:10:48 +0100, Jonas Meurer <jonas at freesources.org>
> declaimed the following in comp.lang.python:
> 
> 
> > version used placeholders as well. anyway, i changed my code to resemble
> 
> 	"resemble" is the key... It is NOT the correct sample.
> 
> >   261         db_connect.cursor.execute("""UPDATE Images SET Image=%s WHERE
> >   262                                 ImgID = %s""" % (image, imgid))
>      262                                 ImgID = %s""" , (image, imgid))
> 
> 	The .execute method ITSELF performs the argument conversion into
> the place holders, including applying what ever quoting is required.
> YOUR version is using the Python formatting operator, which does NOT
> handle database quoting.

oh, your correct.

sorry for the noise.

now it works quite good.

bye
 jonas


From graemercaldwell at yahoo.co.uk  Fri Feb  4 05:40:37 2005
From: graemercaldwell at yahoo.co.uk (Graeme Caldwell)
Date: Fri, 4 Feb 2005 10:40:37 +0000 (GMT)
Subject: python equivalent to haskells iterate.
Message-ID: <20050204104037.44037.qmail@web26501.mail.ukl.yahoo.com>

Subject: equivalent to Haskell's iterate function.
 
While reading through "Two Dozen Short Lessons in Haskell". I came across the following function:
 
     decimalNumeralFromInteger x = reverse [d | (s,d) <- takeWhile(/=(0,0)) (sdPairs x)]
     where
           sdPairs x = iterate nextDigit (x `divMod` 10)
           nextDigit(xShifted,d) = xShifted `divMod` 10
 
What this does is takes as a paramter a decimal integer and converts
it to a sequence in which each member is numeral from each position in
the integer.
e.g.
 
                     decimalNumberFromInteger 543654 = [5,4,3,6,5,4]
 
As Python's the language I am most interested in becoming proficient
in(still a way to go) , I rewrote this in Python. I was trying to preserve the functional aspects of the Haskell, and wanted a python function that would let me repeatedly apply a function(lambda or otherwise) to its own result obviously this is easy to do using a while loop but I wanted a more elegant solution,as in the Haskel code  above.
I found that there are plenty of functions that allow one to iterate over a sequence(itertools module), but could not find a equivalent to Haskell's  iterate.
The best that I could come up with was:
    
def decimalNumeralFromInteger(x):
     list = []
     x = divmod(x,10)
     while x <> (0,0):
          list.append(x[1])
          x = divmod(x[0], 10)
     return list
 
which seems a bit clunky by comparison. 
My question is does such a function exist.
 
If the answer is obvious and in the docs, excoriation is expected
and deserved. 
Also I know it's not really an important issue and the
above function is adequate to the task, but I'm curious if it can be
done the Haskell way and if not, why.


		
---------------------------------
 ALL-NEW Yahoo! Messenger - all new features - even more fun!  
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From ptmcg at austin.rr.com  Sun Feb 27 20:09:48 2005
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 27 Feb 2005 17:09:48 -0800
Subject: parse lines to name value pairs
In-Reply-To: <94c18f5a4bd6cad273a40299b1b137e8@localhost.talkaboutprogramming.com>
References: <94c18f5a4bd6cad273a40299b1b137e8@localhost.talkaboutprogramming.com>
Message-ID: <1109552988.837466.23940@g14g2000cwa.googlegroups.com>

Gee, no takers?

Here's a (surprise!) pyparsing solution.

-- Paul


.# get pyparsing at http://pyparsing.sourceforge.net
.
.from pyparsing import quotedString, printables, Word, OneOrMore,
Forward, Literal,delimitedList,Group
.quotedString.setParseAction(lambda s,l,t: t[0].strip("'\""))
.
.line1 = """path {{data/tom} C:/user/john}"""
.line2 = """books{{book music red} {book {math 1} blue} {book {tom's
book} green}}"""
.
.lbrace = Literal("{").suppress()
.rbrace = Literal("}").suppress()
.listDef = Forward()
.
.nonbracechars = "".join([ c for c in printables if c not in "{}"])
.
.# add more things to listItem, such as integers, etc. if your list has
other than quoted strings
.listItem = OneOrMore(Word(nonbracechars)) | quotedString | listDef
.
.print "With grouping"
.listDef << lbrace + Group( OneOrMore(listItem) ) + rbrace
.lineDef = Word(nonbracechars) + Group(listDef)
.
.for testdata in (line1, line2):
.    print lineDef.parseString(testdata).asList()
.
.print
.
.print "Without grouping"
.listDef << lbrace + ( OneOrMore(listItem) ) + rbrace
.lineDef = Word(nonbracechars) + Group(listDef)

Givest the following output:
With grouping
['path', [[['data/tom'], 'C:/user/john']]]
['books', [[['book', 'music', 'red'], ['book', ['math', '1'], 'blue'],
['book', ["tom's", 'book'], 'green']]]]

Without grouping
['path', ['data/tom', 'C:/user/john']]
['books', ['book', 'music', 'red', 'book', 'math', '1', 'blue', 'book',
"tom's", 'book', 'green']]


for testdata in (line1, line2):
    print lineDef.parseString(testdata).asList()



From enjoylife_95135 at hotmail.com  Wed Feb 23 10:00:31 2005
From: enjoylife_95135 at hotmail.com (Sandman)
Date: 23 Feb 2005 07:00:31 -0800
Subject: running a shell command from a python program
Message-ID: <1109170831.815278.243270@f14g2000cwb.googlegroups.com>

Hi,
   I'm a newbie, so please be gentle :-)

How would I run a shell command in Python?

Here is what I want to do:
I want to run a shell command that outputs some stuff, save it into a
list and do stuff with the contents of that list.

I started with a BASH script actually, until I realized I really needed
better data structures :-)

Is popen the answer? Also, where online would I get access to good
sample code that I could peruse?

I'm running 2.2.3 on Linux, and going strictly by online doc so far.

Thanks!
S C



From edvard+news at majakari.net  Fri Feb 11 06:52:01 2005
From: edvard+news at majakari.net (Edvard Majakari)
Date: Fri, 11 Feb 2005 13:52:01 +0200
Subject: Statement coverage tools revisited
Message-ID: <87zmyb71r2.fsf@titan.staselog.com>


Yow,

For most of you folks Gareth Rees' excellent python code coverage tool -
/statement/ coverage tool to be more precise - is familiar, but there are
probably many TDD-fans out there who are not yet aware of this wonderful
program.

I use the tool a lot, even though it is good to be aware of common false
conceptions regarding tools counting number of visited and unvisited lines
(100% line coverage means exactly what it says and nothing more; see [1] for
more information).

However, statement coverage tools are not useless. They are very handy for
catching those blocks of code you never execute in your tests, but as
mentioned above, you shouldn't feel too secure for having 100% line coverage
for your passed unit tests.

I've only had one minor gripe with the tool, and that is the notation used
for marking visited ('>') and unvisited ('!') lines; it is not handy to grep
for '>' or '!' in annotated version, because both characters occur often in
python code. Of course you could avoid that using '^!', but it's two
keystrokes more :) and stands out less clearly in the code. That's why I did
a very simple patch for the tool, attached below [2] (it is small diff,
don't fret :), so you can even add overly-verbose line prefixes like this:

./pycoverage -a -u '>>> WARNING: NEVER VISITED' -v '>' xmlkit.py

resulting in

>class VLANRange(RangeEntry):
>    """Class for VLAN ID range nodes"""

>    def __init__(self, min_vlan_id, max_vlan_id):
...
>>> WARNING: NEVER VISITED        RangeEntry.__init__(self, ...
...

By the way, there's an interesting comment block in the heading of the code,
saying

,----
| The coverage dictionary is called "c" and the trace function
| "t".  The reason for these short names is that Python looks up variables
| by name at runtime and so execution time depends on the length of
| variables!  In the bottleneck of this application it's appropriate to
| abbreviate names to increase speed.
`----

It was written when 2.1 was the most recent stable version. I wonder if it
still applies for 2.2 and later? According to my hasty tests it doesn't
seem to be so. I didn't have very large unit test files at hand, though.

Footnotes: 

[1] http://www.garethrees.org/2001/12/04/python-coverage/

[2]

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-- 
# Edvard Majakari		Software Engineer
# PGP PUBLIC KEY available    	Soli Deo Gloria!

"Debugging is twice as hard as writing the code in the firstplace. Therefore,
 if you write the code as cleverly as possible, you are, by definition,
 not smart enough to debug it."  -- Brian W. Kernighan

From irmen.NOSPAM at xs4all.nl  Thu Feb 10 16:26:28 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Thu, 10 Feb 2005 22:26:28 +0100
Subject: is there a safe marshaler?
In-Reply-To: <9RMOd.47295$Z14.32810@news.indigo.ie>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<9RMOd.47295$Z14.32810@news.indigo.ie>
Message-ID: <420bd184$0$28994$e4fe514c@news.xs4all.nl>

Alan Kennedy wrote:
> [Irmen de Jong]
> 
>> Pickle and marshal are not safe. They can do harmful
>> things if fed maliciously constructed data.
>> That is a pity, because marshal is fast.
>> I need a fast and safe (secure) marshaler.
> 
> 
> Hi Irmen,
> 
> I'm not necessarily proposing a solution to your problem, but am 
> interested in your requirement. Is this for pyro?

Yes and No.
Yes, I'm investigating possible marshaling alternatives
(others than pickle which Pyro uses right now).
No, I'm not changing Pyro yet. It's just that I want to
investigate possible *secure* alternatives to the current
implementation.
(Note that a secure version would also mean that Pyro's
advanced features such as mobile code should go the way
of the dodo, and I don't want to do this yet).

> In the light of pyro, would something JSON be suitable for your need? I 
> only came across it a week ago (when someone else posted about it here 
> on c.l.py), and am intrigued by it.
> 
> http://json.org

Looks very interesting indeed, but in what way would this be
more secure than say, pickle or marshal?
A quick glance at some docs reveal that they are using eval
to process the data... ouch.


> I thought you might be interested.

I certainly am but for different reasons.

--Irmen


From tjreedy at udel.edu  Sun Feb  6 03:58:08 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 6 Feb 2005 03:58:08 -0500
Subject: Multiple constructors
References: <6SjNd.38337$K7.21639@fe2.news.blueyonder.co.uk>
Message-ID: <cu4m4u$1pa$1@sea.gmane.org>


"Philip Smith" <as006d4848 at blueyonder.co.uk> wrote in message 
news:6SjNd.38337$K7.21639 at fe2.news.blueyonder.co.uk...
> Call this a C++ programmers hang-up if you like.
>
> I don't seem to be able to define multiple versions of __init__ in my 
> matrix

Correct.

> class (ie to initialise either from a list of values or from 2 dimensions 
> (rows/columns)).
>
> Even if Python couldn't resolve the __init__ to use on the basis of 
> argument types surely it could do so on the basis of argument numbers???

Variable parameter counts are handled either with default values or the 
*restlist and **keydict mechanisms.

Keep in mind that the compiler cannot, in general, know, at compile time, 
what function object will be bound to a name at run time.  And that you can 
have only bind a name to one object.

> At any rate - any suggestions how I code this????

The usual way is to write your own dispatch code to either execute the 
appropriate code block or call the appropriate function.

Or you could write a function of functions that returns a function that 
dispatches to one of the functions according to its arg count.  Something 
like (untested, all exceptions passed through):

def arg_count_dispatcher_maker(*funcs):
    def arg_count_dispatcher(*args):
        return funcs[len(args)](*args)
    return arg_count_dispatcher

which you use like this:
    __init__ = arg_count_dispatcher_maker(func0, func1, func2)

Terry J. Reedy 





From snail at objmedia.demon.co.uk  Wed Feb 23 12:09:19 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Wed, 23 Feb 2005 17:09:19 +0000
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cvaoft$av6$1@usenet.otenet.gr>
	<874qg6937w.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<cvcv9b$nbm$1@usenet.otenet.gr> <37uk2kF5gv38bU1@individual.net>
	<nmSSd.25321$Am3.782245@news20.bellglobal.com>
	<cvi2c5$ibu$1@usenet.otenet.gr> <421c91c8$0$44647$a1866201@visi.com>
	<cvi5s1$4l5$1@usenet.otenet.gr> <383qkkF5k6rf4U1@individual.net>
Message-ID: <8BIQdyL$iLHCFw9a@objmedia.demon.co.uk>

In message <383qkkF5k6rf4U1 at individual.net>, George Sakkis 
<gsakkis at rutgers.edu> writes
>"Ilias Lazaridis" <ilias at lazaridis.com> wrote in message 
>news:cvi5s1$4l5$1 at usenet.otenet.gr...
>> Grant Edwards wrote:
>> [...]
>> > Um, you realize that nobody in this thread takes you the least
>> > bit seriously and people are just poking you with a stick to
>> > watch you jump?
>>
>> jump:
>>
>> [EVALUATION] - E02 - Support for MinGW Open Source Compiler
>> Essence:
>> http://groups-beta.google.com/group/comp.lang.python/msg/5ba2a0ba55d4c102
>
>
>Lol, this guy is hopeless :-)

Who's Guido?
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From danperl at rogers.com  Wed Feb 16 12:07:26 2005
From: danperl at rogers.com (Dan Perl)
Date: Wed, 16 Feb 2005 12:07:26 -0500
Subject: more os.walk() issues... probably user error
References: <cuvr5b$2ei$1@solaris.cc.vt.edu>
Message-ID: <JISdnS-GOYNN4I7fRVn-3A@rogers.com>


"rbt" <rbt at athop1.ath.vt.edu> wrote in message 
news:cuvr5b$2ei$1 at solaris.cc.vt.edu...
>     def build_clean_list(self, path):
>
>         file_skip_list = ['search_results.txt']
>         dir_skip_list = ['dev', 'proc', 'Temporary Internet Files']
>
>         fs_objects = os.walk(path, topdown=True)
> ##      for fs in fs_objects:
> ##
> ##            for f in fs[2]:
> ##                if f in file_skip_list:
> ##                    print f
> ##                    fs[2].remove(f)
> ##
> ##            for d in fs[1]:
> ##                if d in dir_skip_list:
> ##                    print d
> ##                    fs[1].remove(d)
>
>         return fs_objects

Rather as an aside, the idiom for using os.walk is
    for dirpath, dirnames, dirfiles in os.walk(path):
        for f in dirnames:
            if f in file_skip_list:
                print f
                filenames.remove(f)
            if d in dir_skip_list:
                print d
                dirnames.remove(f)

More crucially for your code, returning the generator object after having 
iterated all the way through it will not do you any good.  The generator has 
an internal state that puts it at "the end of the iteration" so you cannot 
use it to iterate again. 




From ncoghlan at iinet.net.au  Fri Feb  4 23:31:08 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 05 Feb 2005 14:31:08 +1000
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <20050204180236.GD1607@performancedrivers.com>
References: <dvOMd.33656$EG1.19314@lakeread04>
	<20050204180236.GD1607@performancedrivers.com>
Message-ID: <42044C0C.5080409@iinet.net.au>

Jack Diederich wrote:
> Since this is 2.4 you could also return a generator expression.
> 
> 
>>>>def iter_collapse(myList):
> 
> ...   return (x[0] for (x) in it.groupby([0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5]))
> ... 

But why write a function that returns a generator expression, when you could 
just turn the function itself into a generator?

Py>def iter_collapse(myList):
...   for x in it.groupby(myList):
...     yield x[0]

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From ptmcg at austin.rr.com  Wed Feb 23 11:47:17 2005
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 23 Feb 2005 08:47:17 -0800
Subject: [perl-python] exercise: partition a list by equivalence
In-Reply-To: <87brag6m5b.fsf@sinken.local.csis.hku.hk>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<87ekfclprv.fsf@sinken.local.csis.hku.hk>
	<87brag6m5b.fsf@sinken.local.csis.hku.hk>
Message-ID: <1109177237.722882.5880@g14g2000cwa.googlegroups.com>

Please consider my submission also (Python 2.3-compatible).

-- Paul McGuire

.    import sets
.
.    input = [[1, 2], [3, 4], [2, 3], [4, 5]]
.    input = [[1, 2], [3, 4], [4, 5]]
.    input = [[1, 2],[2,1], [3, 4], [4, 5],[2,2],[2,3],[6,6]]
.
.    def merge(pairings):
.        ret = []
.        for a,b in pairings:
.            s1 = None
.            s2 = None
.            for s in ret:
.                if a in s or b in s:
.                    if s1 is None:
.                        s1 = s
.                    else:
.                        s2 = s
.                        break
.            else:
.                for s in ret:
.                    if a in s:
.                        s.add(b)
.                        break
.                    elif b in s:
.                        s.add(a)
.                        break
.                else:
.                    ret.append(sets.Set([a,b]))
.                continue
.            ret.remove(s1)
.            ret.remove(s2)
.            ret.append(s1.union(s2))
.
.        return [list(s) for s in ret]
.                
.    print merge(input)



From sean at buildingonline.com  Tue Feb 15 16:45:14 2005
From: sean at buildingonline.com (Sean)
Date: Tue, 15 Feb 2005 13:45:14 -0800
Subject: Calling a function from module question.
References: <UTsQd.32669$6u.27954@fed1read02>
	<42125d6d$0$28977$e4fe514c@news.xs4all.nl>
	<3LtQd.32674$6u.18210@fed1read02>
	<c5SdndbH1vSS9o_fRVn-sQ@comcast.com>
Message-ID: <o2uQd.32681$6u.27667@fed1read02>

>>>from module_name import print_this
>>>
>>>or, even:
>>>
>>>from module_name import print_this as other_nice_name
>>
>> So what if I have a whole bunch of functions - say 25 of them.
>> Is there a way to do this without naming each function?
>
> Yes [1], but it's basically deprecated and you shouldn't use it. Consider 
> refactoring your code.
>

Refactoring my code?  Sorry, I am not sure what you mean here.

How would one refactor the example in my original post? 




From dyoo at hkn.eecs.berkeley.edu  Mon Feb 14 18:23:06 2005
From: dyoo at hkn.eecs.berkeley.edu (Daniel Yoo)
Date: Mon, 14 Feb 2005 23:23:06 +0000 (UTC)
Subject: [NewBie] Tut0r Thing
References: <614c778e.0502141413.6b19c091@posting.google.com>
	<mailman.2579.1108419986.22381.python-list@python.org>
Message-ID: <curbsq$qh5$1@agate.berkeley.edu>


: if you're talking about the "tutor at python.org" mailing list, it's a mailing list
: that you send mail to and get mails from, as explained on the tutor mailing
: list page:

:    http://mail.python.org/mailman/listinfo/tutor


Hello,

Also, from the odd spelling of the subject line, I suspect that the
original poster thinks that we're some kind of cracking group.


I hope not, but just to make sure it's clear: when we in the Python
community talk about "hacking", we usually mean it in the constructive
sense: we like building software systems and helping people learn how
to program.

ESR has a good summary here:

    http://www.catb.org/~esr/faqs/hacker-howto.html#what_is

I always feel silly about bringing this up, but it has to be said,
just to avoid any misunderstanding.


Best of wishes to you.


From cyril.bazin at gmail.com  Fri Feb 18 19:25:38 2005
From: cyril.bazin at gmail.com (Cyril BAZIN)
Date: Sat, 19 Feb 2005 01:25:38 +0100
Subject: [perl-python] exercise: partition a list by equivalence
In-Reply-To: <20050218162051.GE17991@grulic.org.ar>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<20050218162051.GE17991@grulic.org.ar>
Message-ID: <a10b8d620502181625423daa9b@mail.gmail.com>

Hello John, 

Try your python code on this example:
merge([[1,2], [3,4], [1,2], [5,3]])

The result given by your function is:
[[3, 4, 5]]

Sorry... 

To Xah: next time you propose an exercise, write some UNIT TESTS!!!
Then people will be able to test if there answers are correct or not.

Cyril



On Fri, 18 Feb 2005 13:20:51 -0300, John Lenton <john at grulic.org.ar> wrote:
> On Thu, Feb 17, 2005 at 03:46:20PM -0800, Xah Lee wrote:
> > here's another interesting algorithmic exercise, again from part of a
> > larger program in the previous series.
> >
> > Here's the original Perl documentation:
> >
> > =pod
> >
> > merge($pairings) takes a list of pairs, each pair indicates the
> > sameness
> > of the two indexes. Returns a partitioned list of same indexes.
> >
> > For example, if the input is
> > merge( [ [1,2], [2,4], [5,6] ] );
> >
> > that means 1 and 2 are the same. 2 and 4 are the same. Therefore
> > 1==2==4. The result returned is
> >
> > [[4,2,1],[6,5]];
> >
> > (ordering of the returned list and sublists are not specified.)
> >
> > =cut
> 
> in Python:
> 
>     def merge(pairings):
>         rev = {}
>         res = []
>         for pairing in pairings:
>             first, second = pairing
>             has_first = first in rev
>             has_second = second in rev
>             if has_first and has_second:
>                 rev[first].extend(rev[second])
>                 rev[second][:] = []
>                 rev[second] = rev[first]
>             elif has_first:
>                 rev[first].append(second)
>                 rev[second] = rev[first]
>             elif has_second:
>                 rev[second].append(first)
>                 rev[first] = rev[second]
>             else:
>                 copy = [first, second]
>                 res.append(copy)
>                 rev[first] = rev[second] = copy
>         return filter(None, res)
> 
> and in Perl:
> 
>     sub merge($)
>     {
>         my %rev = ();
>         my @res = ();
>         my ($pairing, $first, $second, $has_first, $has_second);
>         foreach $pairing (@{$_[0]})
>         {
>             ($first, $second) = @$pairing;
>             $has_first = exists $rev{$first};
>             $has_second = exists $rev{$second};
>             if ($has_first and $has_second)
>             {
>                 push @{$rev{$first}}, @{$rev{$second}};
>                 @{$rev{$second}} = ();
>                 $rev{$second} = $rev{$first};
>             }
>             elsif (exists $rev{$first})
>             {
>                 push @{$rev{$first}}, $second;
>                 $rev{$second} = $rev{$first};
>             }
>             elsif (exists $rev{$second})
>             {
>                 push @{$rev{$second}}, $first;
>                 $rev{$first} = $rev{$second};
>             }
>             else
>             {
>                 my @copy = ($first, $second);
>                 push @res, \@copy;
>                 $rev{$first} = $rev{$second} = \@copy;
>             }
>         }
>         return [grep @$_, @res];
>     }
> 
> although in Perl you wouldn't define it to take a reference to a list
> (as you did), but rather a list, and you wouldn't define it to return
> a reference to a list, but rather a list in list context (and possibly
> a reference in scalar context).
> 
> Both versions are (IMHO) pretty clear (when the docstring/pod is
> included), and O(n) because dict/hash lookup and list
> appending/pushing is O(1) in both languages. Both versions can
> probably be tweaked for speed quite a bit, but I don't *think* there's
> a better-than-O(n) algorithm for this.
> 
> Note that the Python version assumes that the pairs' elements are
> hashable; your example used numbers, so I thought it was pretty safe
> assumption. The Perl version has no such restriction.
> 
> --
> John Lenton (john at grulic.org.ar) -- Random fortune:
> Noble cosa es, a?n para un anciano, el aprender.
>                 -- S?focles. (497-406 a.C.) Fil?sofo griego.
> 
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
> 
>


From philippecmartin at sbcglobal.net  Sat Feb 19 12:58:18 2005
From: philippecmartin at sbcglobal.net (Philippe C. Martin)
Date: Sat, 19 Feb 2005 11:58:18 -0600
Subject: could that be a mutable object issue ?
Message-ID: <1108835898.7186.3.camel@pcmsc>

If I do this:



print 'LEN OF BOOK BEFORE APPEND: ', len(pickle.dumps(self.__m_rw))
self.__m_rw.books.append( [p_col1,p_col2,p_col3] )
print 'LEN OF BOOK AFTER APPEND: ', len(pickle.dumps(self.__m_rw))

I get the same length before and after append.

when I print self.__m_rw.books, I see my 'appends' in there, yet the
pickled object does not change.

Any clue ?

Thanks


Philippe



-- 
***************************
Philippe C. Martin
SnakeCard LLC
www.snakecard.com
***************************



From bvande at po-box.mcgill.ca  Tue Feb  8 11:15:30 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Tue, 08 Feb 2005 11:15:30 -0500
Subject: Learning Python - resources and ideas
In-Reply-To: <1107855763.533466.254380@c13g2000cwb.googlegroups.com>
References: <1107855763.533466.254380@c13g2000cwb.googlegroups.com>
Message-ID: <4208E5A2.50701@po-box.mcgill.ca>

AnOvercomer02 at webtv.net (Cody Houston) said unto the world upon
2005-02-08 05:06:
> Hi. What is the best way to learn Python? None of the local schools
> near me teach any courses on the topic. Thanks.
> 
> --
> 
> Cody Houston
> AnOvercomer02 at webtv.net

Hi Cody,

rec.photo.equipment.35mm? -- kind of an odd follow-up for a post to
com.lang.python.

First thing is to learn to ask better questions. It is a bit hard for
anyone to know what to say without knowing your background and level
of experience with computers and programming.
<http://catb.org/~esr/faqs/smart-questions.html> contains a lot of
very good advice on this.

As for actual learning resources, did you look at www.python.org at
all? (Or search the archives of this group?) The python site has a few
pages of links that speak directly to your question.

But, some concrete suggestions:

The most useful resources for me (I'm still learning, too) was the
Tutor list <http://mail.python.org/mailman/listinfo/tutor>.

A free book that starts very slow (it is aimed at high-school
students) is <http://www.ibiblio.org/obp/thinkCSpy/>

I started with that, until I had a bit of a sense of things (Python is
my first language since some BASIC quite some time ago). The Learning
Python helped a lot <http://www.oreilly.com/catalog/lpython2/>.

Best,

Brian vdB








From administrata at hotmail.com  Fri Feb  4 17:59:45 2005
From: administrata at hotmail.com (administrata)
Date: 4 Feb 2005 14:59:45 -0800
Subject: [noob] Error!
Message-ID: <614c778e.0502041459.39da55c1@posting.google.com>

I'm programming Car Salesman Program.
It's been "3 days" learning python...
But, i got problem


Write a Car Salesman program where the user enters the base price of a
car. The program should add on a bunch of extra fees such as tax,
license, dealer prep, and destination charge. Make tax and license a
percent of the base price. The other fees should be set values.
Display the actual price of the car once all the extras are applied.

print "CAR SALESMAN PROGRAM"
print "\nEnter data."
base_price = int(raw_input("Base Price: "))

tax = int(raw_input("/nTax: "))
license1 = int(raw_input("License: "))
dealer = 30
charge = 5
print "Dealer Prep: ", dealer
print "Destination Charge: ", charge

actual_price = (((base_price * tax / 100) + license1 / 100) + dealer +
change
print "\n\nActual price: ", actual_price

raw_input("")

error occurs, i think the problem is in actual_price. but,
I don't know how to comebine percentage and raw_input.
help me...

thx 4 reading... :)


From grante at visi.com  Tue Feb 15 15:10:55 2005
From: grante at visi.com (Grant Edwards)
Date: 15 Feb 2005 20:10:55 GMT
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr> <37bkemF5a7s7vU1@individual.net>
	<cut6nh$rpk$1@usenet.otenet.gr> <86ll9piuj8.fsf@guru.mired.org>
	<cutf1h$576$1@usenet.otenet.gr>
	<mailman.2643.1108495246.22381.python-list@python.org>
	<cutibq$j8e$1@usenet.otenet.gr>
	<mailman.2647.1108497874.22381.python-list@python.org>
Message-ID: <4212574f$0$46576$a1866201@visi.com>

On 2005-02-15, Adam DePrince <adam at cognitcorp.com> wrote:

> You didn't intent to, but you begging.   Sure, you save some face by not
> obviously groveling, but that only makes the slight worse.  Now somebody
> asked that you to read
> http://www.catb.org/~esr/faqs/smart-questions.html.   Read it in its
> entirety, and come back later.  

The wanker already stated that the "smart questions" essay
doesn't apply to him.  I think he may be right: it only applies
to people who actually want questions answered and problems
solved. I don't think he wants to do/solve/answer anything. He
just wants to piss and moan about how nobody will jump when he
tells them to.

-- 
Grant Edwards                   grante             Yow!  I always liked FLAG
                                  at               DAY!!
                               visi.com            


From no-one at nowhere.com  Tue Feb 15 07:05:39 2005
From: no-one at nowhere.com (George van den Driessche)
Date: Tue, 15 Feb 2005 12:05:39 -0000
Subject: win32gui bug: where to report it?
Message-ID: <cusofn$f0n$1$8302bc10@news.demon.co.uk>

It's taken me ages to find out why my window, built out of win32all, wasn't
receiving any messages. Eventually I found the answer here:

http://mail.python.org/pipermail/python-list/2001-October/069451.html

The important point being:
> IIRC you have to pass the return value of the RegisterClass() call (which
> is an atom) to the CreateWindowEx() function as the second parameter
> (lpClassName).
... in other words, you can pass the name of your window class as the second
parameter, but it will silently fail to work. (This holds for CreateWindow
too.)

This is a bug for which it is pretty much impossible to work out the
workaround without being told it, so I'd like to put the workaround in a
more easily-found place. But where? win32all doesn't seem to have much
documentation, much less a bug database.

In case anyone else needs to find this message by searching, some keywords
are: win32all, win32gui, WNDCLASS, RegisterClass, CreateWindow,
CreateWindowEx

George




From francis.girard at free.fr  Tue Feb  8 02:02:37 2005
From: francis.girard at free.fr (Francis Girard)
Date: Tue, 8 Feb 2005 08:02:37 +0100
Subject: Big development in the GUI realm
In-Reply-To: <cu9eg0$9jb$1@news1.ucsd.edu>
References: <mailman.2123.1107820051.22381.python-list@python.org>
	<4208373e$0$21620$a1866201@visi.com> <cu9eg0$9jb$1@news1.ucsd.edu>
Message-ID: <200502080802.37207.francis.girard@free.fr>


> In any case, he may be right, and the FSF, Trolltech, and you could all
> be wrong. Your intention when you use the GPL may be moot if a judge
> determines that the text itself and copyright law does not support your
> interpretation.

I'm sorry to jump into this thread without any knowledge of these issues. I 
was just wondering if it did happen. Did some law court, over the past 
decade, had to make a decision about GPL on some real issue ? 

Thank you

Francis Girard

Le mardi 8 F?vrier 2005 05:17, Robert Kern a ?crit?:
> Grant Edwards wrote:
> > Sorry if I was a bit blunt, but I'm sick of people trying to
> > weasle their way around a license by creative interpretation of
> > the license terms when the licensors made their intentions as
> > clear as possible.
>
> Believe me, I share your frustration every time this issue comes up.
> However, I think it's best to follow Robert Heinlein's maxim:
>
>   "Never attribute to malice what can adequately be explained by
> stupidity."
>
> And I think we can also replace the word "stupidity" with "ignorance" if
> you like.
>
> It seems to me that "Luke" is confused and ignorant. He has shown no
> indication that he intends to write proprietary software using Qt.
>
> In any case, he may be right, and the FSF, Trolltech, and you could all
> be wrong. Your intention when you use the GPL may be moot if a judge
> determines that the text itself and copyright law does not support your
> interpretation.
>
> I think that it is almost always best to obey the intentions of the
> copyright holder and to ask for clarification when it is unclear. On the
> other hand, if the copyright holder is *clearly* off-base with his
> interpretation (and to me this would require actual case law, not just
> the opinion of a lawyer), then I might consider disregarding the
> author's interpretation and going with what case law and my lawyer
> suggests. I don't believe that this situation holds with respect to this
> issue, of course.
>
> --
> Robert Kern
> rkern at ucsd.edu
>
> "In the fields of hell where the grass grows high
>   Are the graves of dreams allowed to die."
>    -- Richard Harter



From grante at visi.com  Sat Feb 26 21:13:43 2005
From: grante at visi.com (Grant Edwards)
Date: 27 Feb 2005 02:13:43 GMT
Subject: Converting HTML to ASCII
References: <mailman.3066.1109357511.22381.python-list@python.org>
	<slrnd1v5vv.nhu.jgrahn-nntq@frailea.sa.invalid>
	<7xk6ovbob4.fsf@ruckus.brouhaha.com>
Message-ID: <42212cd7$0$44617$a1866201@visi.com>

On 2005-02-26, Paul Rubin <http> wrote:
> Jorgen Grahn <jgrahn-nntq at algonet.se> writes:
>> You should probably do what some other poster suggested -- download
>> lynx or some other text-only browser and make your code execute it
>> in -dump mode to get the text-formatted html. You'll get that
>> working in an hour or so, and then you can see if you need something
>> more complicated.
>
> Lynx is pathetically slow for large files.

First, make it work.  Then make it work right.  Then worry
about how fast it is.  

"Premature optimization..."

> It seems to use a quadratic algorithm for remembering where
> the links point, or something.  I wrote a very crude but very
> fast renderer in C that I can post if someone wants it, which
> is what I use for this purpose.

If lynx really is too slow, try w3m or links.  Both do a better
job of rendering anyway.

-- 
Grant Edwards                   grante             Yow!  I know how to do
                                  at               SPECIAL EFFECTS!!
                               visi.com            


From aleaxit at yahoo.com  Sat Feb  5 14:14:55 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 5 Feb 2005 20:14:55 +0100
Subject: Alternative to standard C "for"
References: <1107628331.816935.16760@o13g2000cwo.googlegroups.com>
	<mailman.1984.1107629393.22381.python-list@python.org>
	<36kjjqF52sv7lU1@individual.net>
Message-ID: <1grj169.v9j8h341mmicN%aleaxit@yahoo.com>

Georg Brandl <g.brandl-2005-01 at gmx.net> wrote:

> Slight terminology glitch -- it does return an iterator, not a
> generator. Generators are functions that return iterators.

xrange returns an ITERABLE, not an ITERATOR.  Videat:

>>> a = xrange(23, 43)
>>> a.next()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'xrange' object has no attribute 'next'
>>> 

No next method -> not an iterator.  iter(xrange(...)) DOES return an
iterator, btw.


Alex


From tom.willis at gmail.com  Thu Feb 24 09:15:37 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Thu, 24 Feb 2005 09:15:37 -0500
Subject: python tutorial/projects
In-Reply-To: <1109239584.738972.271050@z14g2000cwz.googlegroups.com>
References: <cvgf2o$u42$1@agate.berkeley.edu>
	<1109239584.738972.271050@z14g2000cwz.googlegroups.com>
Message-ID: <b54d048905022406155a08cde5@mail.gmail.com>

On 24 Feb 2005 02:06:24 -0800, Fuzzyman <fuzzyman at gmail.com> wrote:
> I'm looking for people to work on a couple of projects... online
> bookmarks manager for example....
> 
> Regards,
> 
> Fuzzy
> http://www.voidspace.org.uk/python/index.shtml
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


How bout a paying full time job doing python development. In Cincinnati. 


That would rule.

I only hear about vb.net or java around here. It's quite depressing.

-- 
Thomas G. Willis
http://paperbackmusic.net


From deetsNOSPAM at web.de  Wed Feb  9 08:46:30 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 09 Feb 2005 14:46:30 +0100
Subject: convert list of tuples into several lists
References: <cud40u$vqb$01$1@news.t-online.com>
Message-ID: <36uihlF58p63iU1@individual.net>

zip(*[(1,4),(2,5),(3,6)])

-- 
Regards,

Diez B. Roggisch


From vincent at visualtrans.de  Wed Feb 23 01:37:06 2005
From: vincent at visualtrans.de (Vincent Wehren)
Date: Wed, 23 Feb 2005 07:37:06 +0100
Subject: basic tkinter/Windows question
In-Reply-To: <7xwtt0ysuo.fsf@ruckus.brouhaha.com>
References: <421BCED0.2070206@irl.cri.nz> <7xwtt0ysuo.fsf@ruckus.brouhaha.com>
Message-ID: <cvh8af$825$1@news3.zwoll1.ov.home.nl>

Paul Rubin wrote:
> I find myself having to write some code on Windows :-(.  To alleviate
> the pain, at least I get to use Python for some of it.
> 
> I'm trying to write a simple application, say "eggs.py".  It pops a
> tkinter gui and lets the user do some stuff.  The system has Python
> installed so I don't care about wrapping it in a .exe file or anything
> like that.  But I'd like to make a desktop icon for eggs.py and let the
> user double-click it and run the app without also getting a DOS box on
> the screen.

Rename the file "eggs.py" to "eggs.pyw" and create a shortcut to that 
file. The file will be opened using pythonw.exe instead of python.exe.

--
Vincent Wehren


> 
> Is there a simple way to do that?  I didn't see anything in the Python
> docs about it.  I suspect that this is really a dumb Windows question,
> but I avoid Windows whenever I can, so most anything I can ask about it
> is probably dumb.
> 
> Thanks much.


From quentel.pierre at wanadoo.fr  Thu Feb 17 15:08:25 2005
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Thu, 17 Feb 2005 21:08:25 +0100
Subject: low-end persistence strategies?
In-Reply-To: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
Message-ID: <4214f9ba$0$832$8fcfb975@news.wanadoo.fr>

Maybe you'll find this too naive, but why do you want to avoid 
concurrent accesses to a database that will be accessed 12 times a day ?

Regards,
Pierre


From dbickett at gmail.com  Sat Feb  5 19:46:51 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Sat, 5 Feb 2005 19:46:51 -0500
Subject: Definitive documentation on newstyle classes? (WAS: Pickling and
	inheritance are making me hurt)
Message-ID: <1d6cdae305020516467620aa0@mail.gmail.com>

I was reading the "Pickling and inheritance are making me hurt"
thread, and the latest suggestion (as of this posting) was to do with
the __setstate__ and __getstate__ methods. They caught my attention
because I hadn't encountered them before, and it reminded me that in
the past I've never been able to very good, definitive documentation
on newstyle classes. Googling for it gives little python tutorials on
various sites, and even searching this newsgroup returns very specific
questions, as a rule.

Alas, the question: Does there exist a page that enumerates all of the
features of the newstyle classes, and explains what they all do? If
so, can anyone provide me with such a link?

Thanks :-)
-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From tzot at sil-tec.gr  Mon Feb 21 08:36:55 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Mon, 21 Feb 2005 15:36:55 +0200
Subject: python2.4 generator expression > python2.3 list expression
References: <mailman.2882.1108961815.22381.python-list@python.org>
	<m2oeee5e2k.fsf@unique.fully.qualified.domain.name.yeah.right>
Message-ID: <0ioj11dsgqhatqc3d7ldeb35rta6d9fk69@4ax.com>

On 21 Feb 2005 06:48:19 -0500, rumours say that Dan Sommers <me at privacy.net>
might have written:

[snip: snacktime posts code to count bits]

>> Seems to work, is there a better way to do this?

[Dan]
>for c in range( 128 ):
>    even_odd = 0
>    print '%3d' % c,
>    while c:
>        c &= c - 1
>        even_odd = not even_odd
>    print int( even_odd )

Just for the sake of people who haven't messed with bit manipulation in C or
assembly, the effect of

c &= c - 1

is to reset the rightmost (less significant) '1' bit of a number (ie change it
to '0').
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From wuwei23 at gmail.com  Thu Feb 10 03:08:23 2005
From: wuwei23 at gmail.com (alex23)
Date: 10 Feb 2005 00:08:23 -0800
Subject: That horrible regexp idiom
References: <mailman.2286.1108019460.22381.python-list@python.org>
Message-ID: <1108022903.762790.60880@l41g2000cwc.googlegroups.com>

Stephen Thorne wrote:
> We've all seen it before. Its a horrible idiom that you would achieve
> in another language by doing:
>
> if (m = foo_pattern.search(subject))
> { }
> else
> { }
>
> but it occured to me today, that it is possible to do it in python
> without the extra line.
>
> '>>> for m in xsearch(foo_pattern, subject):
> '>>>     pass
> '>>> else:
> '>>>     pass
>
> simple, concise, requires no new syntax, and is only a little
confusing[1]!

It won't have quite the same effect though, as the 'else' statement is
*always* called after the 'for' loop completes.

To have the functionality you're after, you need to include a break in
the code block within the loop.

- alex23



From tjreedy at udel.edu  Sat Feb 26 13:44:27 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 26 Feb 2005 13:44:27 -0500
Subject: Problem When Unit Testing with PMock
References: <1109423274.660110.156140@f14g2000cwb.googlegroups.com>
Message-ID: <cvqfqa$fi$1@sea.gmane.org>


<steven at lczmsoft.com> wrote in message 
news:1109423274.660110.156140 at f14g2000cwb.googlegroups.com...
> Anyone was using pmock for unit testing with python?  I met a problem
> and hope someone to help me.  For short, the pmock seems can not mock a
> iterator object.

Why bother?

def mockit(): raise StopIteration

now pass mockit()

> For example, the tested object is foo, who need to send message to
> another object bar.  So, to test the foo, I need mock a mockBar.  But
> the bar is a iterator, the foo use the bar in this way:
>
>     foo.method(self, bar):
>         for n in bar:
>             do somthing
>              ...

To properly test the method, *also* feed it an iterator that yields a few 
objects of the appropriate type.  Assuming n is to be an int...

def intit(k):
  for i in range(k): yield i

Terry J. Reedy







From cpl.19.ghum at spamgourmet.com  Mon Feb  7 01:33:03 2005
From: cpl.19.ghum at spamgourmet.com (Harald Massa)
Date: Mon, 7 Feb 2005 06:33:03 +0000 (UTC)
Subject: overwriting method in baseclass
Message-ID: <Xns95F64CD37EEF7cpl19ghumspamgourmet@195.20.224.116>

Hello!

I am using a library (= code of so else) within Python. Somewhere in this 
library there is:

class foo:
    	def baa(self, parameters):
         print "something"
         self.baazanan(some other parameters)


class mirbo(foo):
      def baazanan(self, lalala):
          print "heylo tada"

class fujiko(foo):
      def baazanan(self, ltara):
          print "sing a song with me"


....


now I want to change the common baa-method. so that

def baa(self, parameters):
      print "soemthing special"
      self.baazanan(some other parameters)

Of course, I use a Python- and GPL-Licence compatible library, I can 
change the source of foo, and use my changed library.

But someday, it happened before, there will be an update by the publisher 
to that library.... and I have to do all again.

So, what is the most elegant solution to administer these changes? 

Harald


From apardon at forel.vub.ac.be  Wed Feb  9 10:04:29 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 9 Feb 2005 15:04:29 GMT
Subject: Is email package thread safe? (fwd)
References: <mailman.2245.1107959519.22381.python-list@python.org>
Message-ID: <slrnd0k9jt.26q.apardon@rcpc42.vub.ac.be>

Op 2005-02-09, Roman Suzi schreef <rnd at onego.ru>:
>
> (this is a repost with an addition - probably noone noticed my message first 
> time)
>
> Hi!
>
> Just to be sure, is email package of Python 2.3 thread-safe or not
> (to use, for example, in python-milter?)
>
> P.S. And where can I find information on particular piece of standard library
> if it is thread-safe or need locking? I recall 'random' module is (was?)
> unsafe - which isexplicitly stated in the docs.

Well I guess it was unsafe. The current documentation states:

  The underlying implementation in C is both fast and threadsafe. 

http://www.python.org/doc/2.3.5/lib/module-random.html

There is class for random number generation that is not thread safe
and is included to allow reproducing sequences from previous versions.

> Can I assume that everything 
> else without such notice is thread-safe?

I doubt it. There is no indication that the email package uses any
kind of locking. So multiple thread working on the same message
will probably screw things up.

-- 
Antoon Pardon


From ilias at lazaridis.com  Sat Feb  5 09:44:11 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sat, 05 Feb 2005 16:44:11 +0200
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
In-Reply-To: <pan.2005.02.03.19.10.39.349763@jerf.org>
References: <ctsjmg$75p$1@usenet.otenet.gr>
	<pan.2005.02.03.19.10.39.349763@jerf.org>
Message-ID: <cu2m3q$km1$1@usenet.otenet.gr>

Jeremy Bowers wrote:
> On Thu, 03 Feb 2005 09:26:08 +0200, Ilias Lazaridis wrote:
> 
>> My question is essentially:
>> 
>> How many of those constructs are already supported by python (and 
>> the surrounding open-source-projects):
>> 
>> http://lazaridis.com/case/stack/index.html
> 
> This post is hard to follow, but I'm going to assume this is the core
>  question, as it is labelled as such.

ok

Thank you for your thorought comments.

> The first thing that leaps to mind is that you need to play with 
> Python for a bit to get a full analysis of it. Due to the nature of 
> Python, some of the things you have in that list don't really apply.
> 
> 
> The most obvious example of this is "code generation": Assuming you 
> mean
[...]

I want to generate things (code, txt, html etc.) out of my object-model,
  whilst using with a flexible generator, if possible a standard one.

Does such generator exist?

[...]
> "Use of metadata within the design (on text level [code file])" can 
> mean a thousand things. For what it's worth, Python tends to make it 
> so easy I do it all the time, but for any given way you mean it, I 
> can't promise there exists a pre-rolled framework for you.

I want to add metadata to everything within my design (functions, data,
classes, ...), if possible with a standard way.

Does such metadata-functionality (build-in, add-on-library, framework) 
exist for python?

> So I can only speak generally. Given your list, you may find that 
> Python is weak in the "graphical programming" department; 
> drop-and-drop GUI generation isn't as well-tuned as VB. (I, for one, 
> consider that development methodology toxic and actively dangerous, 
> but I can understand why you miss it.)

I prefere generic GUI's.

But sometimes there is a need for simple predefined GUI's.

Thus: I want to create GUI's in an generic way, and/or in an standard
way (via GUI editor).

> Skipping down to your evaluation sequence:

http://lazaridis.com/case/stack/index.html#evaluation

> * Create a class: Well, I'll show you this one:
> 
> class Something: pass
> 
> There, a class.

ok
-

you've missed:

"declare this class as persistent"

> * Simple GUI: You may wish to check out Boa Constructor, as the 
> closest thing to the GUI generator you probably want. There are at 
> least 3 major viable GUI toolkits for Python and several other minor 
> (but still capable) ones.

=> {GUI Generator: Boa Constructor}

> * Embedded DBs: I don't know, Google for your embedded DB name + 
> Python. Failing that, there are several ways to wrap your embedded DB
>  such that a Python program can use it.

ok

Clarification: standard way to save python objects into an embedded db 
(in conjunction wiht "declare this class as persistent")

> * Web GUI: There are more Python web frameworks than you can shake a 
> stick at, and I don't mean "some guys hacked together templating 
> system" either; there are a lot of very mature systems out there, 
> expressing a lot of different philosophies. Given some of your other 
> requirements, for a web-based application I'd recommend examining 
> Zope.

ok.

Can please someone name some of them?

[they should work together with simple python classes and the standard 
metadata]

> * Deployment: I don't generally have enough problems with this to be 
> worth thinking about. I don't know what the state of the remote 
> debugging is on Python; Google "remote debugging Python".

[I like to avoid interaction with google.]



> * For your "complex updates", I see two distinct things there; half 
> of the depend on the database, not Python.

It depends on how my python-build system binds to the underlaying database.

> For the other half, it depends on if you mean "while the program is
> still running". If so, they are challenging. If not, they are
> trivial.

You are right.

New Requirements:

a) While the programm in shutted down.
b) While the programm in still running.

> * I'd recommend adding "testability" to your stack, and refer you to 
> the "unittest" module; others can suggest their preferred testing 
> modules, but I tend to stick with that as the general framework is 
> available in a lot of languages that I use. If by evolutive 
> development you are including the ideas behind "agile software 
> development" (hard to tell if you mean that, or a community open to 
> change*)

I don't know "agile software development", thus I cannot answer you.

I'll think about to add "testability" to the stack.

> Based on what I see here, I have two basic comments. First, yes, 
[...]
>  have, that even if it isn't perfect it's a helluva lot better than 
> Java!

I've not evaluated Java.

Just it's communities.

Thus I can "dive" immediately & fully into python, without any philosoph 
switch (if i select python finally).

> *: Community open to change: One caveat, from what I've seen when 
> other people talk about this. The Python community is open to change,
>  but it is still a meritocracy, and you will still need to convince 
> others your change is good. 
[...] - (standard library etc.)

I understand.

-

A rational change suggestion does not need time to be accepted.

Just rational decision takers (e.g. community).

.

-- 
http://lazaridis.com


From nick at craig-wood.com  Tue Feb  1 15:29:43 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 01 Feb 2005 20:29:43 GMT
Subject: Where are list methods documented?
References: <41ffba7d$0$15879$a1866201@visi.com>
	<mailman.1702.1107279469.22381.python-list@python.org>
	<41ffc37a$0$15874$a1866201@visi.com>
	<mailman.1704.1107282139.22381.python-list@python.org>
Message-ID: <slrncvvp7s.ccc.nick@irishsea.home.craig-wood.com>

Tim Peters <tim.peters at gmail.com> wrote:
>  You could have gotten to the same place in several ways.
[snip]

Since I'm a unix person, I would have typed

  pydoc -k sort

But it doesn't come up with anything useful :-(

  $ pydoc -k sort
  MySQLdb.stringtimes - Use strings to handle date and time columns as a last resort.

...

In fact I've never had any luck with pydoc -k.  I think what it
searches through is too narrow - from its man page

    Run "pydoc -k <keyword>" to search for a keyword in the synopsis lines
    of all available modules.

This is the NAME line that appears in pydoc I think.

If it did a full text search that would be much more useful, or at
least a search through all the names of the functions & variables that
are exported.

...

My top wish for pydoc is to have the rest of the documentation in it!
Each module has lots of nice documentation which is only available in
HTML format - I'd much rather type "pydoc whatever" to see it all,
rather than have to load my browser, and click through several layers
of web pages.

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


From tom at tomaw.org  Sun Feb 27 09:33:00 2005
From: tom at tomaw.org (Tom Wesley)
Date: Sun, 27 Feb 2005 14:33:00 +0000
Subject: Beginner PyGTK and MySQL abuse request
Message-ID: <4221da4d$0$54815$ed2619ec@ptn-nntp-reader02.plus.net>

Hey,

I've spent far too long being spoilt by a relatively simplistic "just do 
it" style of database application in use at work and have decided to try 
my hand at some Python + MySQL + GTK over the next few days.

I've managed to steal/write a short script that asks for some input and 
searches a database and print the results and was wondering if people 
would have the time to suggest better ways of doing the limited set of 
things it does?

---search.py---
#!/usr/bin/env python

import pygtk
pygtk.require('2.0')
import gtk
import adodb

class AddressSearch:
	def delete_event(self, widget, data=None):
		gtk.main_quit()
		return gtk.FALSE
		
	def btn_search(self, widget, data=None):
		conn = adodb.NewADOConnection('mysql')
		conn.Connect('localhost','root','','rtl')
		
		sql = "select * from address where match(Address1, Address2, Address3, 
Address4, Address5) against('+" + self.entry_address1.get_text() + "+" + 
self.entry_address2.get_text() + "+" + self.entry_address3.get_text() + 
"' in boolean mode);"
		print sql
		cursor = conn.Execute(sql)
		while not cursor.EOF:
			arr = cursor.GetRowAssoc(0)
			print arr['rtlforename'], arr['rtlsurname']
			cursor.MoveNext()
		
		cursor.Close()
		conn.Close()

	def __init__(self):
		self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
		self.window.set_title("Address search")
		self.window.connect("delete_event", self.delete_event)
		self.window.set_border_width(20)

		table = gtk.Table(5, 2, gtk.TRUE)
		self.window.add(table)

		label = gtk.Label("Address:")
		table.attach(label, 0, 1, 1, 5)
		self.entry_address1 = gtk.Entry(max=80)
		table.attach(self.entry_address1, 1, 2, 0, 1)
		self.entry_address2 = gtk.Entry(max=80)
		table.attach(self.entry_address2, 1, 2, 1, 2)
		self.entry_address3 = gtk.Entry(max=80)
		table.attach(self.entry_address3, 1, 2, 2, 3)

		button = gtk.Button(label='Search', stock=gtk.STOCK_OK)
		button.connect("clicked", self.btn_search)
		table.attach(button, 0, 1, 3, 4)

		button = gtk.Button(label="Quit", stock=gtk.STOCK_QUIT)
		button.connect("clicked", self.delete_event)
		table.attach(button, 1, 2, 3, 4)

		self.window.show_all()

def main():
	gtk.main()
	return 0

if __name__ == "__main__":
	AddressSearch()
	main()
---end---


Cheers,
Tom


From and-google at doxdesk.com  Sat Feb  5 22:19:34 2005
From: and-google at doxdesk.com (and-google at doxdesk.com)
Date: 5 Feb 2005 19:19:34 -0800
Subject: CGI POST problem was: How to read POSTed data
References: <mailman.1980.1107622913.22381.python-list@python.org>
	<dMydnSAsTcgE2JjfRVn-oQ@rogers.com>
Message-ID: <1107659974.048175.221770@z14g2000cwz.googlegroups.com>

Dan Perl wrote:

> how is a multipart POST request parsed by CGIHTTPServer?

It isn't; the input stream containing the multipart/form-data content
is passed to the CGI script, which can choose to parse it or not using
any code it has to hand - which could be the 'cgi' module, but not
necessarily.

> Where is the parsing done for the POST data following the header?

If you are using the 'cgi' module, then cgi.parse_multipart.

> As a side note, I found other old reports of problems with cgi
> handling POST  requests, reports that don't seem to have had a
> resolution.

(in particular?)

FWIW, for interface-style and multipart-POST-file-upload-speed reasons
I wrote an alternative to cgi, form.py
(http://www.doxdesk.com/software/py/form.html). But I haven't found
cgi's POST reading to be buggy in general.

> There is even a bug reported just a few days ago (1112856) that is
> exactly about multipart post requests. If I understand the bug
> report correctly though, it is only on the latest version in CVS
> and it states that what is in the 2.4 release works.

That's correct.

> All this tells me that it could be a "fragile" part in the standard
> library.

I don't really think so; it's really an old stable part of the library
that is a bit crufty in places due to age. The patch that caused
1112856 was an attempt to rip out and replace the parser stuff, which
as a big change to old code is bound to cause trouble. But that's what
the dev cycle is for.

CGIHTTPServer, on the other hand, I have never really trusted. I would
suspect that fella.

-- 
Andrew Clover
mailto:and at doxdesk.com
http://www.doxdesk.com/



From bpeng at rice.edu  Wed Feb  2 02:30:18 2005
From: bpeng at rice.edu (Bo Peng)
Date: Wed, 02 Feb 2005 01:30:18 -0600
Subject: mixing SWIG generated and Python-level usertype?
Message-ID: <ctpvia$emb$1@joe.rice.edu>

Dear list,

My SWIG generated module (myModule) needs an array-like object (carray) 
to work. Carray objects are created both internally (in C++ level) and 
through Python so I have to load it when myModule initializes.

carray is modified from arraymodule.c and is quite simple:

static PyMethodDef a_methods[] =
{
   {"carray", a_array, METH_VARARGS, a_array_doc},
   {                                               /* sentinel */
     NULL,    NULL
   }
};

Currently, I load a_methods directly using code (error checking ignored)

   PyObject* mm = PyImport_AddModule("__main__");
   PyObject* dict = PyModule_GetDict(mm);
   PyObject*  v = PyCFunction_New(a_methods, NULL);
   PyDict_SetItemString(dict, a_methods->ml_name, v);

There are several problems with this approach:

1. use of __main__? carray can not be accessed directly within other 
libraries. ('from myModule import *' DOES NOT import carray!) I tried to 
use __builtins__ but it does not work for some reason out of my 
understanding of Python. I am not sure how to add carray to myModule 
dictionary.

2. No type object? I am not sure what is the purpose of ArrayType but 
the usual init_module should be
     m = Py_InitModule3("carray", a_methods, module_doc);
     d = PyModule_GetDict(m);
     PyDict_SetItemString(dict, "ArrayType", (PyObject *)&Arraytype);

When I add ArrayType to __main__ , access to ArrayType leads to a quick 
core dump.

I do not feel comfortable with my current approach. Could anyone tell me 
some better (more standard) way?

Many thanks in advance.
Bo


From jack at performancedrivers.com  Sat Feb 12 19:57:03 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Sat, 12 Feb 2005 19:57:03 -0500
Subject: Kill GIL (was Re: multi threading in multi processor (computer))
In-Reply-To: <cum62t$3fb$1@panix2.panix.com>
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<1107964587.818199.223980@g14g2000cwa.googlegroups.com>
	<mailman.2254.1107966236.22381.python-list@python.org>
	<7xr7jlwieq.fsf@ruckus.brouhaha.com>
	<cum62t$3fb$1@panix2.panix.com>
Message-ID: <20050213005703.GF14175@performancedrivers.com>

On Sat, Feb 12, 2005 at 07:13:17PM -0500, Aahz wrote:
> In article <7xr7jlwieq.fsf at ruckus.brouhaha.com>,
> Paul Rubin  <http://phr.cx at NOSPAM.invalid> wrote:
> >
> >The day is coming when even cheap computers have multiple cpu's.
> >See hyperthreading and the coming multi-core P4's, and the finally
> >announced Cell processor.

I'm looking forward to Multi-core P4s (and Opterons).  The Cell is a
non-starter for general purpose computing.  Arstechnica has a couple
good pieces on it, the upshot is that it is one normal processor
with eight strange floating point co-processors hanging off it.

> >Conclusion: the GIL must die.
> 
> It's not clear to what extent these processors will perform well with
> shared memory space.  One of the things I remember most about Bruce
> Eckel's discussions of Java and threading is just how broken Java's
> threading model is in certain respects when it comes to CPU caches
> failing to maintain cache coherency.  It's always going to be true that
> getting fully scaled performance will require more CPUs with non-shared
> memory -- that's going to mean IPC with multiple processes instead of
> threads.
> 
> Don't get me wrong -- I'm probably one of the bigger boosters of threads.
> But it bugs me when people think that getting rid of the GIL will be the
> Holy Grail of Python performance.  No way.  No how.  No time.

"Me Too!"  for a small number of processors (four) it is easier (and
usually sufficient) to pipeline functional parts into different
processes than it is to thread the whole monkey.  As a bonus this usually
gives you scaling across machines (and not just CPUs) for cheap.  I'm 
aware there are some problems where this isn't true.  From reading this
thread every couple months on c.l.py for the last few years it is my 
opinion that the number of people who think threading is the only solution
to their problem greatly outnumber the number of people who actually have 
such a problem (like, nearly all of them).

Killing the GIL is proposing a silver bullet where there is no werewolf-ly,

-Jack



From nospam at me.invalid  Sun Feb 27 07:40:17 2005
From: nospam at me.invalid (anthonyberet)
Date: Sun, 27 Feb 2005 12:40:17 +0000
Subject: string methods (warning, newbie)
In-Reply-To: <mailman.3105.1109470554.22381.python-list@python.org>
References: <mailman.3105.1109470554.22381.python-list@python.org>
Message-ID: <38dtdjF5o9b7sU1@individual.net>

Jimmy Retzlaff wrote:
> Anthonyberet wrote:
> 
>>Is there a string mething to return only the alpha characters of a
> 
> string?
> 
>>eg 'The Beatles - help - 03 - Ticket to ride', would be
>>'TheBeatlesTickettoride'
>>
>>If not then how best to approach this?
>>I have some complicated plan to cut the string into individual
>>characters and then concatenate a new string with the ones that return
>>true with the .isalpha string method.
>>
>>Is there an easier way?
> 
> 
> The approach you are considering may be easier than you think:
> 
> 
>>>>filter(str.isalpha, 'The Beatles - help - 03 - Ticket to ride')
> 
> 'TheBeatleshelpTickettoride'
> 
Thanks very much - that's the level of knowledge of Python that I just 
don't have yet - everything I try to do seems to have a much easier way, 
that I haven't encountered yet :)

I shall read up on the elements of your code to understand exactly what 
it is doing.


From rupole at hotmail.com  Thu Feb 24 12:48:42 2005
From: rupole at hotmail.com (Roger Upole)
Date: Thu, 24 Feb 2005 12:48:42 -0500
Subject: Need some Python help
References: <mailman.3000.1109259089.22381.python-list@python.org>
Message-ID: <421e1565_2@127.0.0.1>

There's a bug in python's tokenizer that's triggered when
the generated wrapper code for a COM object has
lines longer than 512.  See below link for a workaround:

https://sourceforge.net/tracker/?func=detail&atid=551954&aid=1085454&group_id=78018

       Roger


"Matt Upton" <matt2 at roffs.com> wrote in message 
news:mailman.3000.1109259089.22381.python-list at python.org...
>
>
> Hello, I am new to Python and am trying to produce script to run batch
> processes for ArcGIS 9.0 (ArcView).  I have upgraded to Phython 2.4 from 
> 2.1
> and am using the Pythonwin to try to code but am running into a problem.
> Whenever I try to debug my program or run any code past the following code
> it gets hung up and crashes, quits, no warning, and no messages.  HELP, 
> what
> is the problem, it is getting very frustrating.
>
>>> import win32com.client
>>> gp = win32com.client.Dispatch("esriGeoprocessing.GPDispatch.1")
>>> gp.workspace = "c:/Program Files/ArcGIS/NASA"
>
>
> It ALWAYS crashes and quits 30 sec or so after line 2 or 3 of the code
> above????  I can't get Python to do anything in ArcGIS so far, none of the
> tools can be called or used?
>
> I am assuming there is some sort of path or link that is not working
> properly between ArcGIS and Python?
>
> Using the same coding in the IDLE Python environment results in the same
> crashing results.
>
> Oh yea, I am running everything on Windows XP.
>
> Thank you.
>
> Matthew Upton
>
>
>
> 



----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
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From danperl at rogers.com  Fri Feb  4 02:00:53 2005
From: danperl at rogers.com (Dan Perl)
Date: Fri, 4 Feb 2005 02:00:53 -0500
Subject: advice needed for simple python web app
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
	<ctv48p$75$1@eeyore.INS.cwru.edu>
Message-ID: <N86dnZ7k56I3gJ7fRVn-tg@rogers.com>


"Brian Beck" <exogen at gmail.com> wrote in message 
news:ctv48p$75$1 at eeyore.INS.cwru.edu...
> From my experience, this appears to be the order from low-level to 
> high-level interfaces:
>
> 1. mod_python: As complex as you need it to be, since you can control 
> anything about the request & response process. But more up-front work and 
> decisions to make than CherryPy.
> 2. mod_python with Vampire: Directs you toward a specific publishing 
> framework that is similar to CherryPy.
> 3. CherryPy: Like Vampire but simpler and doesn't require mod_python. The 
> simplest blend between low-level server interface and ease-of-publishing.
> 4. Twisted: Seems like this is a big package to work with, not sure how 
> easy it makes publishing once you get started-- better that someone else 
> comment on this.
> 5. Zope: The most complex solution, doesn't necessarily make the 'easy 
> things easy.' But covers all fronts in terms of what a user would ever 
> need.
> 6. Zope with Plone: Adds a ton of publishing functionality. Has many ways 
> to extend, but none of them are fun. You'll have to learn such complex 
> APIs that Python will rarely help you.

This is exactly the kind of summary that I think should be in a 
WebProgrammingShootOut (see another one of my postings in this thread) but I 
failed to find such a summary.  Thanks, Brian!  Anyone can add to the list?

BTW, there are other people who seem to have been also confused by the wide 
spectrum of choices for this problem: 
http://pyre.third-bit.com/hippoblog/archives/000058.html 




From steven.bethard at gmail.com  Wed Feb 23 23:32:52 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 23 Feb 2005 21:32:52 -0700
Subject: Like overloading __init__(), but how?
In-Reply-To: <pan.2005.02.24.03.20.40.119047@yahooz.com>
References: <pan.2005.02.24.03.20.40.119047@yahooz.com>
Message-ID: <n9udnV8BV5ZpxYDfRVn-vg@comcast.com>

John M. Gabriele wrote:
> class Vector3d:
>       def __init__(self):
>             ...
>       def __init__(self, x_from, y_from, z_from, x_to, y_to, z_to):
>             ...
>       def __init__(self, point_from, point_to):
>             ...
>       def __init__(self, same_as_this_vec):
>             ...

My preferred option is to break these into different methods.  I pick 
the xyz-coords (and the empty coords) __init__ as the most basic cases, 
but if you find one of the other cases to be more basic, the 
modification should be pretty simple.

class Vector3d(object):
     # define init to take only xyz coords (missing coords default to 0)
     # this covers your first two cases, I think
     def __init__(self, x_from=0.0, y_from=0.0, z_from=0.0,
                        x_to=0.0,   y_to=0.0,   z_to=0.0):
         ...

     # define a classmethod that creates a Vector3d from points
     # this covers your third case
     @classmethod
     def from_points(cls, point_from, point_to):
         ...
         return cls(x_from=..., y_from=..., ...)

     # define copy as an instance method, not a constructor
     # this covers your fourth case
     def copy(self):
         ...
         return type(self)(x_from=..., y_from=..., ...)


Another possibility is to play around with *args:

class Vector3d(object):
     def __init__(self, *args):
         if not args:
             # constructor with no arguments
         elif len(args) == 6:
             # constructor with xyz coords
         elif len(args) == 2:
             # constructor with points
         elif len(args) == 1:
             # copy constructor
         else:
             raise TypeError('expected 0, 1, 2 or 6 args, got %i' %
                             len(args))

But this can get really ugly really quick.

HTH,

STeVe


From danb_83 at yahoo.com  Wed Feb 23 23:59:12 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 23 Feb 2005 20:59:12 -0800
Subject: rounding problem
References: <gu6dnWNLB-FHuoDfRVn-tA@comcast.com>
	<pan.2005.02.24.03.50.24.914208@comcast.net>
Message-ID: <1109221152.118191.136510@f14g2000cwb.googlegroups.com>

tom wrote:
> On Wed, 23 Feb 2005 19:04:47 -0600, Andy Leszczynski wrote:
>
> > It is on Windows, Linux, Python 2.3:
> >
> > [GCC 3.3.2 (Mandrake Linux 10.0 3.3.2-6mdk)] on linux2 Type "help",
> > "copyright", "credits" or "license" for more information.
> >  >>> a=1.1
> >  >>> a
> > 1.1000000000000001
...
> > Is it normal?
>
> Yes. Quite normal.
...
> The print statement ,by itself, adds the most minimial formatting,
which
> amounts to dropping the last significant digit your math processor
holds.
> That last digit will *always* contain some arithmetic slop.

Your statement is misleading, because it suggests that your processor
stores digits.  It doesn't; it stores *bits*.

The distinction is important because 1.1 does not have a finite
representation in binary.  Instead, it's the repeating bit sequence 1.0
0011 0011 0011...
This is analogous to 1/3 = 0.333... in base ten.

IEEE 754 requires that all normalized numbers be rounded to 53
significant bits, so "1.1" is actually stored as 0x1.199999999999A,
which is equivalent to the decimal number
1.100000000000000088817841970012523233890533447265625.  Python's repr
function rounds this to 17 significant digits, or "1.1000000000000001".



From nessus at mit.edu  Thu Feb 24 14:03:52 2005
From: nessus at mit.edu (Douglas Alan)
Date: Thu, 24 Feb 2005 14:03:52 -0500
Subject: Canonical way of dealing with null-separated lines?
References: <lcll9efw8l.fsf@gaffa.mit.edu>
	<mailman.3006.1109264015.22381.python-list@python.org>
Message-ID: <lczmxtpyp3.fsf@gaffa.mit.edu>

Christopher De Vries <devries at idolstarastronomer.com> writes:

> I'm not sure if there is a canonical method, but I would
> recommending using a generator to get something like this, where 'f'
> is a file object:

Thanks for the generator.  It returns an extra blank line at the end
when used with "find -print0", which is probably not ideal, and is
also not how the normal file line iterator behaves.  But don't worry
-- I can fix it.

In any case, as a suggestion to the whomever it is that arranges for
stuff to be put into the standard library, there should be something
like this there, so everyone doesn't have to reinvent the wheel (even
if it's an easy wheel to reinvent) for something that any sysadmin
(and many other users) would want to do on practically a daily basis.

|>oug


From steven.bethard at gmail.com  Mon Feb  7 14:41:59 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 07 Feb 2005 12:41:59 -0700
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <mailman.2097.1107802306.22381.python-list@python.org>
References: <dvOMd.33656$EG1.19314@lakeread04>	<mailman.2034.1107725421.22381.python-list@python.org>	<cu7532$er8$01$1@news.t-online.com>	<200502071907.12169.francis.girard@free.fr>
	<mailman.2097.1107802306.22381.python-list@python.org>
Message-ID: <yPidnesl840cWZrfRVn-pg@comcast.com>

John Lenton wrote:
> For example, the fastest way
> to get the factorial of a (small enough) number in pure python is
> 
>   factorial = lambda n: reduce(operator.mul, range(1, n+1))

Gah!  I'll never understand why people use lambda, which is intended to 
create _anonymous_ functions, to create named functions!  This code is 
basically equivalent to:

     def factorial(n):
         return reduce(operator.mul, range(1, n+1))

except that factorial.__name__ is now the meaningful 'factorial', 
instead of '<lambda>'.  See "Inappropriate use of Lambda" in
     http://www.python.org/moin/DubiousPython


My personal beef with the inappropriate use of lambda aside, and 
ignoring the fact that the reduce solution as written fails for 
factorial(0), some timings are in order.  Given fact.py:

----------------------------------------------------------------------
import operator

def f1(n):
     result = 1
     for x in xrange(1, n+1):
         result *= x
     return result

def f2(n):
     return reduce(operator.mul, range(1, n+1))

def f3(n):
     return reduce(operator.mul, xrange(1, n+1))
----------------------------------------------------------------------

I get the following timeit results (with Python 2.4):

$ python -m timeit -s "import fact" "[fact.f1(x) for x in xrange(1, 100)]"
100 loops, best of 3: 2.53 msec per loop

$ python -m timeit -s "import fact" "[fact.f2(x) for x in xrange(1, 100)]"
100 loops, best of 3: 2.46 msec per loop

$ python -m timeit -s "import fact" "[fact.f3(x) for x in xrange(1, 100)]"
100 loops, best of 3: 2.17 msec per loop

So it does look like reduce is actually faster in this case, especially 
if you use xrange instead of range.

Thanks for the example!

Steve


From jerf at jerf.org  Wed Feb  2 16:20:41 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Wed, 02 Feb 2005 16:20:41 -0500
Subject: Generating modul classes with eval
References: <mailman.1772.1107377411.22381.python-list@python.org>
Message-ID: <pan.2005.02.02.21.20.40.542069@jerf.org>

On Wed, 02 Feb 2005 20:49:07 +0000, Axel Straschil wrote:

You are doing several things wrong.

> I was fooling around with creating classes for a module with eval,

You shouldn't create classes with eval, because you don't need to.

"class" isn't a declaration, it is an executable statement that creates
new classes. We'll get into that momentarily...

> something like:
> 
> MyModule.py:
> 
> class Base:
> 	init(self, name):
> 		self._name = name

Your "init" function needs to be spelled "__init__", or it will not be
automatically called.

You also did not correctly use "def" to create your function. When posting
to the newsgroup, try to use real code that you have actually executed.

> that gives: <class '__main__.A'>, but I want MyModule.A ;-)

No, it won't, since your code has syntax errors in it. Post the code you
actually ran.

That said, "__main__" indicates you ran it in the interactive shell. That
is correct, and won't change. Also, the name printing the class gives is
only very rarely important; overall you shouldn't be using that.

I'll start with giving you this:

-------

import sys
module = sys.modules[__name__]

class Base:
    def __init__(self, name):
        self._name = name

for myclass in ['A', 'B', 'C']:
    class Tmp(Base):
        myname = myclass
        def __init__(self):
            Base.__init__(self, self.myname)

    setattr(module, myclass, Tmp)
    
-------

Note that we don't need eval anywhere.

But I'd suggest that this is more likely what you want:

-------

class Base:
    def __init__(self, name):
        self._name = name

myClasses = {}

for className in ['A', 'B', 'C']:
    class Tmp(Base):
        myname = className
        def __init__(self):
            Base.__init__(self, self.myname)

    myClasses[className] = Tmp
    
-------

Adding things straight to modules is rarely worth it; you're better off
just collecting them somewhere.

There are too many differences to go over here between my code and yours,
so if you have questions, please ask. One of the reasons you don't want
eval is that I had to give up trying to read your class code!

Finally, while such generated classes do have their use, I'd ask what you
are planning to do with this; odds are, you don't need it.

In general, unless you are using "eval" to literally execute user supplied
input, you *almost* certainly don't need it.

A downside of my approach is that printing all three classes will say the
class name is "Tmp". Since, as I said, you really shouldn't care about
that, I don't care to try to fix it :-) If you can provide a compelling
reason why you need that, somebody here can help you with that.


From raver2046 at gmail.com  Tue Feb 15 18:36:55 2005
From: raver2046 at gmail.com (raver2046)
Date: Wed, 16 Feb 2005 00:36:55 +0100
Subject: how to import a .py in a parent directory ?
Message-ID: <4212878f$0$9483$636a15ce@news.free.fr>

hello,

I know to import a .py in a subdirectory is   :   .  (dot)
but what is the statment for parent directory ?

thank you.
olivier noblanc
http://www.logiciel-erp.fr




From fuzzyman at gmail.com  Wed Feb  2 09:19:14 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 2 Feb 2005 06:19:14 -0800
Subject: Is this a contradiction in the docs ?
In-Reply-To: <4200dccb$0$26664$636a15ce@news.free.fr>
References: <1107342032.273119.194120@o13g2000cwo.googlegroups.com>
	<4200c8a6$0$518$626a14ce@news.free.fr>
	<1107349293.858397.127620@f14g2000cwb.googlegroups.com>
	<4200dccb$0$26664$636a15ce@news.free.fr>
Message-ID: <1107353954.920995.241800@o13g2000cwo.googlegroups.com>


Pierre Barbier de Reuille wrote:
> Fuzzyman a ?crit :
> >
> >
> > Yes.. but that would mean that eval could only run code objects
that
> > "consist[s] of a single expression".. which I doubt is the reality
or
> > the intention.
> >
> > Regards,
> > Fuzzyman
> > http://www.voidspace.org.uk/python/index.shtml
> >
>
> [Sorry, I deleted the commented lines because they were completely
> unreadable anyway]
>

That's alright - I *have* to read via google, which hides quoted lines
anyway......

> It's exactly what eval is for : evaluate a single expression and
return
> its result ! Try with strings : you can't even evaluate a statement !

> You can only evaluate an expression !
>

Right.

> And what would be the return result of a sequence of statement ?
>

:-) I'm not interested in the return result. The code object is run in
the current namespace, so I use it to run scripts.

> If you want to execute a sequence, you want to use exec, not eval ...
>

Yup - I've swapped them over in my code.

Thanks
Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> Pierre



From gharper at medplus.com  Wed Feb  9 15:55:31 2005
From: gharper at medplus.com (Harper, Gina)
Date: Wed, 9 Feb 2005 15:55:31 -0500
Subject: two questions - no common theme
Message-ID: <4D97153E7D88F44FB6B534C661EE42900300A649@medexch1.medplus.com>

2) os.listdir "returns a list containing the names of the entries in the
directory", this does include directories in the top level directory.
For the complete listing try os.walk() which "returns a tuple-(dirpath,
dirnames, filenames"


-----Original Message-----
From: Sean McIlroy [mailto:sean_mcilroy at yahoo.com] 
Sent: Wednesday, February 09, 2005 3:08 PM
To: python-list at python.org
Subject: two questions - no common theme


And now for a pair of questions that are completely different:

1) I'd like to be able to bind callbacks to presses of the arrow buttons
on the keyboard. How do you say that in Tkinter?

2) The function 'listdir' in os.path returns a list of all the files in
the given directory - how do I get hold of a list of its subdirectories?

Any help will be greatly appreciated.

Peace,
STM



From martin at v.loewis.de  Tue Feb 22 21:03:09 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 23 Feb 2005 03:03:09 +0100
Subject: UTF-8 / German,
 Scandinavian letters - is it really this difficult??
 Linux & Windows XP
In-Reply-To: <1109081846.102735.167730@z14g2000cwz.googlegroups.com>
References: <cve1vh$c37$1@phys-news1.kolumbus.fi>
	<1109078512.094288.316030@z14g2000cwz.googlegroups.com>
	<421b385e$0$230$edfadb0f@dread12.news.tele.dk>
	<1109081846.102735.167730@z14g2000cwz.googlegroups.com>
Message-ID: <421BE45D.4090902@v.loewis.de>

Fuzzyman wrote:
>>ust = '???'.decode('utf-8')
>>
> 
> Which is now deprecated isn't it ? (including encoded string literals
> in source without declaring an encoiding).

Not having an encoding declaration while having non-ASCII characters
in source code is deprecated.

Having non-ASCII characters in string literals is not deprecated
(assuming there is an encoding declaration in the source); trusting
then that the string literals are utf-8-encoded (and decoding
them such) is fine.

Regards,
Martin


From steve at holdenweb.com  Thu Feb  3 11:05:33 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 03 Feb 2005 11:05:33 -0500
Subject: convert ftp.retrbinary to file object? - Python language lacks
 expression?
In-Reply-To: <cttgd3$1llu$1@ulysses.news.tiscali.de>
References: <19804fd8.0502030208.10ace31e@posting.google.com>	<ctt0l1$o66$1@sea.gmane.org>	<ctt1cj$q2n$1@sea.gmane.org>
	<mailman.1806.1107430675.22381.python-list@python.org>
	<cttgd3$1llu$1@ulysses.news.tiscali.de>
Message-ID: <s2sMd.102697$Jk5.69122@lakeread01>

Robert wrote:

> That turns into periodic new RETR commands with offset. Think its more 
> an "odd" trick. I'd even prefer a threaded approach (thread puts the 
> blocks into a stack; a while ... yield generator loop in the main thread 
> serves the .read() function of the pseudo file object, which is my 
> wish). Yet such tricks are all kind of OS-level tricks with a lot of 
> overhead.
> 
> I wonder really, if the Python language itself can express an elegant 
> flat solution to turn the block delivering callback function into a 
> generator/.read(bytes) solution? I found no way.
> 
Don't know whether this would be helpful as a starting point, but a 
while (hmm, some years ...) ago I wrote an example of how FTP could be 
used as a file-like object. Look for ftpStream.py on

   http://www.holdenweb.com/Python/

Of course, in those days files could do a bit less than they can now, so 
there's no attempt to provide an iterator interface.

> (Looking over some Ruby stuff, Ruby seems to be able to do so from the 
> language. I am not really familiar to Ruby. I always felt Python to be 
> as complete - but much more clean. I became somewhat jealous ... :-) )
> 
> As the solution in my case has to stand many different file systems 
> compatibly ( file.read(bytes) function !) and also other FTPS & SFTP 
> classes with different retrbinary functions have to be compatible, I 
> cannot even make a simple FTP subclassed retrbinary without getting 
> really weired. Thus the existing .retrbinary with callback is the 
> "official interface in this game".
> 
You will note that my code uses delegation to an FTP object rather than 
inheritance. Maybe you would find that approach more fruitful for your 
application.

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From tzot at sil-tec.gr  Thu Feb 10 13:33:24 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 10 Feb 2005 20:33:24 +0200
Subject: Efficient checksum calculating on lagre files
References: <5o2nd2-5hl.ln1@pluto.i.infosense.no>
	<4208E537.4070901@chamonix.reportlab.co.uk>
	<mailman.2199.1107881519.22381.python-list@python.org>
	<slrnd0jm1s.l3u.nick@irishsea.home.craig-wood.com>
Message-ID: <h0an01ld3j3prpcpmmcok33hena8c6lvm6@4ax.com>

On 09 Feb 2005 10:31:22 GMT, rumours say that Nick Craig-Wood
<nick at craig-wood.com> might have written:

>Fredrik Lundh <fredrik at pythonware.com> wrote:
>>  on my machine, Python's md5+mmap is a little bit faster than
>>  subprocess+md5sum:
>> 
>>      import os, md5, mmap
>> 
>>      file = open(fn, "r+")
>>      size = os.path.getsize(fn)
>>      hash = md5.md5(mmap.mmap(file.fileno(), size)).hexdigest()
>> 
>>  (I suspect that md5sum also uses mmap, so the difference is
>>  probably just the subprocess overhead)
>
>But you won't be able to md5sum a file bigger than about 4 Gb if using
>a 32bit processor (like x86) will you?  (I don't know how the kernel /
>user space VM split works on windows but on linux 3Gb is the maximum
>possible size you can mmap.)

Indeed... but the context was calculating efficiently checksums for large files
to be /served/ by a webserver.  I deduce it's almost certain that the files
won't be larger than 3GiB, but ICBW :)
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From grante at visi.com  Thu Feb 17 17:15:40 2005
From: grante at visi.com (Grant Edwards)
Date: 17 Feb 2005 22:15:40 GMT
Subject: How to wrap a class's methods?
References: <4214f167$0$44618$a1866201@visi.com>
	<20050217194911.GF2366@grulic.org.ar>
	<mailman.2780.1108677687.22381.python-list@python.org>
Message-ID: <4215178c$0$44653$a1866201@visi.com>

On 2005-02-17, Michael Spencer <mahs at telcopartners.com> wrote:
>> I'd usually put big fat warnings around this code, and explain exaclty
>> why I need to do things this way...
>
> As a low-tech alternative, what about sourcecode generation,

Interesting idea.  It's almost like haveing a macro capability. :)

-- 
Grant Edwards                   grante             Yow!  Oh my GOD -- the
                                  at               SUN just fell into YANKEE
                               visi.com            STADIUM!!


From ncoghlan at iinet.net.au  Thu Feb 10 08:46:18 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Thu, 10 Feb 2005 23:46:18 +1000
Subject: That horrible regexp idiom
In-Reply-To: <3e8ca5c805020923107c36cd7f@mail.gmail.com>
References: <3e8ca5c805020923107c36cd7f@mail.gmail.com>
Message-ID: <420B65AA.5030805@iinet.net.au>

Stephen Thorne wrote:
> Hi,
> 
> import re
> foo_pattern = re.compile('foo')
> 
> '>>> m = foo_pattern.search(subject)
> '>>> if m:
> '>>>    pass
> '>>> else:
> '>>>    pass

Heh. Did you see Ray Gibbons's 'Testing Conditions' post before you sent this?

I knew if/elif was a much better argument in favour of embedded assignment than 
while loops are.

Anyway, here's the above using my idle thought from that the thread.:

   if m using foo_pattern.search(subject) as m:
     pass
   else:
     pass

And the 'alternative patterns' case:

   if m using foo_pattern.search(subject) as m:
     pass
   elif m using bar_pattern.search(subject) as m:
     pass
   else:
     pass

(Y'know, I'm pretty sure the impetus was regexp matching the *last* time 
embedded assignment came up. . .)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From wittempj at hotmail.com  Tue Feb 15 13:04:48 2005
From: wittempj at hotmail.com (wittempj at hotmail.com)
Date: 15 Feb 2005 10:04:48 -0800
Subject: os.walk() usage
References: <cut8ur$3v6$1@solaris.cc.vt.edu>
Message-ID: <1108490688.466311.115920@l41g2000cwc.googlegroups.com>

every object in os.walk() returns a 3-tuple, like below, it seems your
code assumes it returns only a list of files.

for d in os.walk('c:\\temp'):
	(dirpath, dirnames, filenames) = d
	print dirpath
	print dirnames
	print filenames



From jamie.parent at sympatico.ca  Fri Feb 11 10:32:44 2005
From: jamie.parent at sympatico.ca (Jamie R. Parent)
Date: 11 Feb 2005 07:32:44 -0800
Subject: Injecting a C side object into the local dict
Message-ID: <1108135964.686350.115090@f14g2000cwb.googlegroups.com>

Hello,

How do you go about taking a variable which was declared in C and pass
that through to a Python script? I have tried doing this by adding a
simple string which is a PyObject from C into the local dictionary and
retrieving it from script via a locals()["myCvar"] print statement.
This however does not seem to work. It would seem that when the scripts
are ran the local dictionary with the added item is wiped clean and a
new local dictionary is instead used. Any direction or help would be
appreciated.

Cheers,
Jamie.



From gerrit.muller at embeddedsystems.nl  Wed Feb 16 08:32:07 2005
From: gerrit.muller at embeddedsystems.nl (Gerrit Muller)
Date: Wed, 16 Feb 2005 14:32:07 +0100
Subject: "Architecture of Python" restored! [was Re: "Architecture of Python"
 was removed ?]
In-Reply-To: <16869.3053.896410.298943@montanaro.dyndns.org>
References: <004801c4f7cb$f62d1d30$1d02a8c0@cr>
	<mailman.509.1105448285.22381.python-list@python.org>
	<cs2kpn$4se$1@news.tue.nl>
	<16869.3053.896410.298943@montanaro.dyndns.org>
Message-ID: <42134B57.6020104@embeddedsystems.nl>


> Jim Jackson's UIUC email address is/was jwjackso at students.uiuc.edu.  Jim, if
> you're out there, is it okay to reconstruct your old C427 assignment
> somewhere else?
> 
The original pages at <http://wiki.cs.uiuc.edu/cs427/PYTHON> appear to 
be restored completely, including the nice visualizations!

thanks, Gerrit

-- 
Gaudi systems architecting:
<http://www.extra.research.philips.com/natlab/sysarch/>



From jicman at gmail.com  Wed Feb  9 20:53:59 2005
From: jicman at gmail.com (comp.lang.java)
Date: 9 Feb 2005 17:53:59 -0800
Subject: Java Integer.ParseInt translation to python
References: <008d01c507f4$451d9b30$2820790d@stso.xcdg.xerox.com>
	<372a762405013116263a4e93b7@mail.gmail.com>
	<mailman.2222.1107909486.22381.python-list@python.org>
Message-ID: <1108000439.637482.253800@z14g2000cwz.googlegroups.com>


Ok.  Just to end this, here is what is happening with this.  Take for
example this piece of java code:

int i = 235;
byte b = (byte)i;

this will assign b a value of -21.  Huh?  Ok, so in java a byte is an 8
bit value between -128 to 127.  So, what (byte) does to an integer is
to check if the value is over 127.  If it is the new value is the value
- 256.  Otherwise, the value gets the integer, thus

def MyByte(int):
  if int > 127:
    return int - 256
  else:
    return int

will do the trick.

thanks for all the input folks.

jos?

jose isaias cabrera wrote:
> Ok, so this,
>
> >> buffer[0] = (byte)Integer.parseInt(string,16);
>
> in java is, partly, this
>
> buffer[0] = int(string, 16)
>
> in python.  But here is my problem.  When I call this java
subroutine,
>
>   byte[] decodeKey(String inString)
>   {
>     if (inString == null)
>             return null;
>
>     System.out.println("StringLength = " + inString.length());
>     byte[] retBuf = new byte[inString.length()/2];
>     // The string has two hex characters per byte.
>     for (int index = 0; index < retBuf.length; index++)
>     {
>       System.out.print(inString.substring(2*index, 2*index+2));
>       System.out.println(" " +
>         Integer.parseInt(inString.substring(2*index, 2*index+2), 16)
+ " " +
>         (byte)Integer.parseInt(inString.substring(2*index,
2*index+2), 16));
>       retBuf[index] =
>         (byte)Integer.parseInt(inString.substring(2*index,
2*index+2), 16);
>     }
>     System.out.println(retBuf);
>
>     return retBuf;
>   }
>
> I get this output:
> StringLength = 40
> c1 193 -63
> 7c 124 124
> e1 225 -31
> 86 134 -122
> ab 171 -85
> 94 148 -108
> ee 238 -18
> b0 176 -80
> de 222 -34
> 8a 138 -118
> e3 227 -29
> b5 181 -75
> b7 183 -73
> 51 81 81
> a7 167 -89
> c4 196 -60
> d8 216 -40
> e9 233 -23
> ed 237 -19
> eb 235 -21
> [B at 1616c7
>
> But, here is what I have for python,
>
> def PrepareHash(HashStr):
>   while len(HashStr) > 0:
>     byte = HashStr[0:2]
>     print byte,int(byte,16),byte(int(byte,16)) # & 0xff
>     HashStr = HashStr[2:]
>   return byte
>
> def Main():
>   HashStr = "c17ce186ab94eeb0de8ae3b5b751a7c4d8e9edeb"
>   HashStr = PrepareHash(HashStr)
>   print "Prepared HashStr :",HashStr
>
> Main()
>
> and it results to,
>
> mulo 19:32:06-> python test.py
> c1 193 ?
> 7c 124 |
> e1 225 ?
> 86 134
> ab 171 ?
> 94 148
> ee 238 ?
> b0 176 ?
> de 222 ?
> 8a 138
> e3 227 ?
> b5 181 ?
> b7 183 ?
> 51 81 Q
> a7 167 ?
> c4 196 ?
> d8 216 ?
> e9 233 ?
> ed 237 ?
> eb 235 ?
>
> which is not even close, and yes, I know that it's not the same code.
 So,
> the question is, how can I make this java (byte) call in python? so
that the
> result would be the right one, "[B at 1616c7"
> 
> Thanks.
> 
> jos?



From Scott.Daniels at Acm.Org  Thu Feb 24 12:01:12 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Thu, 24 Feb 2005 09:01:12 -0800
Subject: Canonical way of dealing with null-separated lines?
In-Reply-To: <lcll9efw8l.fsf@gaffa.mit.edu>
References: <lcll9efw8l.fsf@gaffa.mit.edu>
Message-ID: <421e0432$1@nntp0.pdx.net>

Douglas Alan wrote:
> Is there a canonical way of iterating over the lines of a file that
> are null-separated rather than newline-separated?  Sure, I can
> implement my own iterator using read() and split(), etc., but
> considering that using "find -print0" is so common, it seems like
> there should be a more cannonical way.

You could start with this code and add '\0' as a line terminator:

     http://members.dsl-only.net/~daniels/ilines.html


--Scott David Daniels
Scott.Daniels at Acm.Org


From eurleif at ecritters.biz  Sun Feb  6 21:29:46 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sun, 06 Feb 2005 21:29:46 -0500
Subject: OT: why are LAMP sites slow?
In-Reply-To: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
Message-ID: <36o1tgF52utrnU1@individual.net>

Paul Rubin wrote:
> I notice that lots of the medium-largish sites (from hobbyist BBS's to
> sites like Slashdot, Wikipedia, etc.)  built using this approach are
> painfully slow even using seriously powerful server hardware.  Yet
> compared to a really large site like Ebay or Hotmail (to say nothing
> of Google), the traffic levels on those sites is just chickenfeed.

To some extent, I would say it has to do with the servers being used. 
Slashdot has only 10 servers [1], while Wikipedia has only 39 [2]; 
Hotmail, on the other hand, has around 3500 [3].

A better comparison to Hotmail is the high-traffic Web site Neopets, 
which has around 200 servers [4] and uses Linux, Oracle, MySQL (for a 
few parts of the site), Apache, and PHP.

[1] <http://slashdot.org/faq/tech.shtml#te050>
[2] <http://meta.wikimedia.org/wiki/Wikimedia_servers>
[3] <http://www.securityoffice.net/mssecrets/hotmail.html#_Toc491601826>
[4] Estimated by counting the name of wwwXXX.neopets.com domain names 
(238). Neopets probably has at least 300 servers if you include non-Web 
servers.


From robey at flaminglunchbox.net  Wed Feb  2 01:14:14 2005
From: robey at flaminglunchbox.net (Robey Holderith)
Date: Wed, 02 Feb 2005 01:14:14 -0500
Subject: Python Code Auditing Tool
References: <pan.2005.02.02.05.47.52.827795@flaminglunchbox.net>
	<7xhdkvbjab.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2005.02.02.06.14.14.516276@flaminglunchbox.net>

On Tue, 01 Feb 2005 21:52:28 -0800, Paul Rubin wrote:

> Robey Holderith <robey at flaminglunchbox.net> writes:
>> Does anybody know of a tool that can tell me all possible exceptions that
>> might occur in each line of code?  What I'm hoping to find is something
>> like the following:
> 
> That is impossible.  The parameter to the raise statement is a class
> object, which can be anything.  I.e. you could say:
> 
>    class ex1: pass
>    class ex2: pass
> 
>    if something(): my_ex = ex1
>    else: my_ex = ex2
> 
>    raise my_ex    # static tool can't know what exception gets raised here.

I suppose that I am willing to lessen my expectations from _all_ to most.
;-) Regarding your example I could also do:

    if something():
        def nothing(): return 0
    else:
        def nothing(): return 1

But this doesn't stop IDEs from attempting to do auto-completion.  I'm not
trying to find hidden exceptions... just trying to easily get an idea of
what could go wrong on each line of code.

-Robey Holderith



From administrata at hotmail.com  Tue Feb 15 06:07:28 2005
From: administrata at hotmail.com (administrata)
Date: 15 Feb 2005 03:07:28 -0800
Subject: Delivery Status Notification (Failure)
Message-ID: <614c778e.0502150307.496b97d6@posting.google.com>

Hello. I was about to use tutor-mailing But, When i send to
tutor at python.org

reply is...

This is an automatically generated Delivery Status Notification.

Delivery to the following recipients failed.

       bob.gailer at magnoliaroad.net

and the header...

From: Sm0kin'_Bull . <administrata at hotmail.com> 
To: tutor at python.org 
Subject: [Tutor] . 
Sent: Tuesday, February 15, 2005 7:57 PM 
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Plz HELP me;


From 735115 at gmail.com  Fri Feb 11 13:04:30 2005
From: 735115 at gmail.com (Bryant Huang)
Date: 11 Feb 2005 10:04:30 -0800
Subject: Loading functions from a file during run-time
References: <1108091598.055004.24890@g14g2000cwa.googlegroups.com>
	<mailman.2389.1108128837.22381.python-list@python.org>
Message-ID: <1108145070.732098.253550@o13g2000cwo.googlegroups.com>

Ah, thanks a lot, Grant and Nick.

Let me try to clarify because I think I was unclear in specifying what
I want to do:

1. Read in a file containing a bunch of function definitions:

def f1(x):
      ...

def f2(x):
      ...

def f3(x):
      ...

def f4(x):
      ...

2. In wxPython, populate a CheckListBox with all the functions defined
in that file.

3. Allow the user to check some of the functions, say for example, f1()
and f3().

4. The program then executes f1() and f3() on some specified data.


The reason I asked these questions is because I don't know what
functions are contained in the function file ahead of time, but I still
want to be able to read those in, then based on which functions the
user selects, to run those accordingly, even though I still don't know,
at design-time, what functions are contained in the function file.

Does that make sense?

Thanks a lot!
Bryant



From irmen.NOSPAM at xs4all.nl  Fri Feb 18 09:23:54 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Fri, 18 Feb 2005 15:23:54 +0100
Subject: Annoying Socket Problem
In-Reply-To: <mailman.2797.1108737330.22381.python-list@python.org>
References: <mailman.2797.1108737330.22381.python-list@python.org>
Message-ID: <42160090$0$28988$e4fe514c@news.xs4all.nl>

John Abel wrote:
> I'm hoping this is something simple, and someone can point me in the 
> right direction here.  I have a class based on SocketServer 
> (ThreadingTCPServer), and I've used makefile on the socket so I use the 
> "for in " routine.  My client sends it a small amount of data.  However, 
> both programs appear to hang once the data has been sent, obviously 
> something to do with flushing.

http://www.amk.ca/python/howto/sockets/sockets.html#SECTION000400000000000000000

--Irmen


From nav+posts at bandersnatch.org  Tue Feb  8 11:06:23 2005
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: Tue, 08 Feb 2005 11:06:23 -0500
Subject: python code with indention
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
Message-ID: <87mzuf9gu8.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>

"Xah Lee" <xah at xahlee.org> writes:

> is it possible to write python code without any indentation?

Not if Turing-completeness is something you desire.

Nick

-- 
#  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this to a python
print reduce(lambda x,y:x+chr(ord(y)-1),' Ojdl!Wbshjti!=obwAcboefstobudi/psh?')


From porterboy76 at yahoo.com  Fri Feb 25 04:29:19 2005
From: porterboy76 at yahoo.com (porterboy)
Date: 25 Feb 2005 01:29:19 -0800
Subject: auto-completion history
Message-ID: <c4b57fd0.0502250129.16099d7f@posting.google.com>

Hi Folks,

I have auto-completion set up in my python interpreter so that if I
hit the tab key it will complete a variable or a python command*. eg.
if I type
>>> imp
and if I then hit the tab key, the interpreter will complete it to...
>>> import

Now, I also use Matlab at the command line a lot and it has a nice
additional auto-completion feature, whereby, if you type a few letters
and hit the up-arrow, it will go back to the last command you typed
that began with those letters. If you keep hitting up-arrow it will
cycle through all the commands you typed beginning with these letters.
eg. if I type...

>>> import datetime
>>> import sys
>>> today = datetime.date.today()
>>> imp

After typing the last imp I hit up-arrow once I would like the history
to return to
>>> import sys
and if I hit twice, I would like to go to
>>> import datetime

Does a feature like this already exist in python???

Thanks

The PorterBoy - "Lovely day for a Guinness" 

ps...
* If you are unsure how to set up auto completion (UNIX only) ...

1. Include this line in your .tcshrc file (or equivalent in .bashrc):
       setenv PYTHONSTARTUP "$HOME/.pythonrc.py"
2. In the file ~/.pythonrc.py include the lines:
       import rlcompleter, readline
       readline.parse_and_bind('tab: complete')
       del rlcompleter, readline
3. For the effect to work, open a new terminal, and type python. If
you do not fire up a new session, python has no way to become aware of
your changes.


From ben.champion at gmail.com  Wed Feb  9 05:29:35 2005
From: ben.champion at gmail.com (FLChamp)
Date: 9 Feb 2005 02:29:35 -0800
Subject: Vectors in Visual Python
Message-ID: <1107944975.498403.225950@f14g2000cwb.googlegroups.com>

SOrry if this message is a little confused, it most probably reflects
the state of the author!

I have made a small program that plots the orbit of a planet in visual
python using visual.vector for all values. If i run the program it is
clear that the orbit is non-keplerian as the planets gradually moves
away from the sun. I am pretty sure the orbit should be keplerian so i
guess there must be some source of error in the program.

I am using "from __future__ import division" and the initial conditions
I have are from NASA's horizons system, all values are accuracte to
more than 10 decimal places.

I was wondering if there was a way to specify the type of number used
by visual.vector, for example, when using an array it is possible to
specify the type as float64. If visual.vector was using a smaller
amount of memory to store the number could this be the source of the
error I am finding? If not what else could be the culprit?

I have used a 4th order RK method which I have previously produced
Keplerian orbits with.

I hope I have made some sense here and look forward to any input

Many Thanks

Ben



From gashton at cmedltd.com  Thu Feb 24 04:54:03 2005
From: gashton at cmedltd.com (Graham Ashton)
Date: 24 Feb 2005 01:54:03 -0800
Subject: Selective HTML doc generation
In-Reply-To: <mailman.2976.1109182341.22381.python-list@python.org>
References: <1109169752.819253.202930@o13g2000cwo.googlegroups.com>
	<mailman.2976.1109182341.22381.python-list@python.org>
Message-ID: <1109238843.901331.224580@g14g2000cwa.googlegroups.com>

Thanks Brian, much appreciated. Looks quite straightforward.

Graham



From steven.bethard at gmail.com  Thu Feb 17 11:54:56 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 17 Feb 2005 09:54:56 -0700
Subject: newbie question - iterating through dictionary object
In-Reply-To: <4214cb21$0$44602$a1866201@visi.com>
References: <1108656866.128912.109800@f14g2000cwb.googlegroups.com>
	<4214cb21$0$44602$a1866201@visi.com>
Message-ID: <cYCdnd7-6rzDUYnfRVn-qw@comcast.com>

Grant Edwards wrote:
> Here's another choice, that's sometimes handy:
> 
>>>>d = {1:'one',2:'two',3:'three'}
>>>>for k,v in d.items():
> 
> ....  print k,v
> .... 
> 1 one
> 2 two
> 3 three
> 
> I wouldn't recommend this for large dictionaries.

Yes, for large dictionaries, you should use:

for k, v in d.iteritems():
     print k, v

STeVe


From lbates at syscononline.com  Fri Feb 25 11:57:59 2005
From: lbates at syscononline.com (Larry Bates)
Date: Fri, 25 Feb 2005 10:57:59 -0600
Subject: Splitting strings - by iterators?
In-Reply-To: <pan.2005.02.25.15.55.31.77881@jeremysanders.net>
References: <pan.2005.02.25.15.55.31.77881@jeremysanders.net>
Message-ID: <Be2dnWSlIL6MxILfRVn-1Q@comcast.com>

Jeremy,

How did you get the string in memory in the first place?
If you read it from a file, perhaps you should change to
reading it from the file a line at the time and use
file.readline as your iterator.

fp=file(inputfile, 'r')
for line in fp:
    ...do your processing...

fp.close()

I don't think I would never read 400,000 lines as a single
string and then split it.  Just a suggestion.

Larry Bates

Jeremy Sanders wrote:
> I have a large string containing lines of text separated by '\n'. I'm
> currently using text.splitlines(True) to break the text into lines, and
> I'm iterating over the resulting list.
> 
> This is very slow (when using 400000 lines!). Other than dumping the
> string to a file, and reading it back using the file iterator, is there a
> way to quickly iterate over the lines?
> 
> I tried using newpos=text.find('\n', pos), and returning the chopped text
> text[pos:newpos+1], but this is much slower than splitlines.
> 
> Any ideas?
> 
> Thanks
> 
> Jeremy
> 


From detlev at die-offenbachs.de  Sun Feb 20 08:08:44 2005
From: detlev at die-offenbachs.de (Detlev Offenbach)
Date: Sun, 20 Feb 2005 14:08:44 +0100
Subject: ANN: eric3 3.6.2 released
Message-ID: <cva24s$6qk$2@online.de>

Hi,

this is to inform all of you about the release of eric3 3.6.2. It is a
bug fix release and will work with the latest QScintilla/sip/PyQt.

It is available via http://www.die-offenbachs.de/detlev/eric3.html

What is eric3?
--------------
Eric3 is a Python IDE written using PyQt and QScintilla. It has
integrated project management capabilities, it gives you an unlimited
number of editors, an integrated Python shell, an integrated debugger,
integrated interfaces to CVS and Subversion, an integrated refactoring
browser (Bicycle Repair Man), integrated unittest and much more.


Regards,
Detlev
-- 
Detlev Offenbach
detlev at die-offenbachs.de


From jan.dries at dcube-resource.be  Tue Feb  8 15:33:13 2005
From: jan.dries at dcube-resource.be (Jan Dries)
Date: Tue, 08 Feb 2005 21:33:13 +0100
Subject: Pypy - Which C modules still need converting to py?
In-Reply-To: <opslwus5w41js0xs@news.telkomsa.net>
References: <opslwus5w41js0xs@news.telkomsa.net>
Message-ID: <42092209.609@dcube-resource.be>

Caleb Hattingh wrote:
> Anyone have that page  
> ref handy listing the C modules that the pypy team need translated into  
> python?

http://codespeak.net/pypy/index.cgi?doc/cmodules.html

Regards,
Jan


From ajsiegel at optonline.com  Wed Feb  9 22:37:04 2005
From: ajsiegel at optonline.com (Arthur)
Date: Wed, 09 Feb 2005 22:37:04 -0500
Subject: A great Alan Kay quote
References: <420a5c1e$0$21630$a1866201@visi.com>
	<mailman.2264.1107976858.22381.python-list@python.org>
	<420a6491$0$29509$a1866201@visi.com>
	<mailman.2270.1107980587.22381.python-list@python.org>
Message-ID: <cpkl01hg54cbp9mjnnkevbn0chps4psam2@4ax.com>

On Wed, 9 Feb 2005 21:23:06 +0100, Francis Girard
<francis.girard at free.fr> wrote:
>
>I love him.

I don't.
>
>It's also interesting to see GUIs with windows, mouse (etc.), which apparently 
>find their origin in is mind, probably comes from the desire to introduce 
>computers to children.


Alfred Bork, now 
Professor Emeritus
Information and Computer Science
University of California, Irvine 92697

had written an article in 1980 called  

"Interactive Learning" which began

"We are at the onset of a major revolution in education, a revolution
unparalleled since the invention of the printing press. The computer
will be the instrument of this revolution."

In 2000 he published:

"Interactive Learning: Twenty Years Later"

looking back on his orignal article and its optimistic predictions and
admitting "I was not a very good prophet"

What went wrong?

Among other things he points (probably using a pointing device) at the
pointing device

"""
Another is the rise of the mouse as a computer device. People had the
peculiar idea that one could deal with the world of learning purely by
pointing.

"""
The articles can be found here:

http://www.citejournal.org/vol2/iss4/seminal.cfm 

One does not need to agree or disagree, it seems to me about this or
that point on interface, or influence, or anything else. What one does
need to do is separate hope from actuality, and approach the entire
subject area with some sense of what is at stake, and with some true
sense of the complexity of the issues, in such a  way that at this
stage of the game the only authentic stance is one of humility,

Kay fails the humility test, dramatically. IMO.

Art


From ncoghlan at iinet.net.au  Sat Feb 26 23:05:06 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 27 Feb 2005 14:05:06 +1000
Subject: function expression with 2 arguments
In-Reply-To: <1109453122.034646.290200@z14g2000cwz.googlegroups.com>
References: <1109419984.213993.49280@f14g2000cwb.googlegroups.com>	<98ydnSp0COmeLr3fRVn-jQ@powergate.ca>
	<1109453122.034646.290200@z14g2000cwz.googlegroups.com>
Message-ID: <422146F2.7040605@iinet.net.au>

Xah Lee wrote:
> Python doc is quite confounded in it's way of organization centered
> around implementation tied to hardware (as most imperative languages
> are hardware-centric), as opposed to algorithm math concepts.

Actually, Python's docs are centred around the fact that they expect people to 
start out by at least skimming the freaking tutorial. . .

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From damien.wyart at free.fr  Mon Feb 14 17:52:36 2005
From: damien.wyart at free.fr (Damien Wyart)
Date: Mon, 14 Feb 2005 23:52:36 +0100
Subject: parsing IMAP responses?
References: <42111b20$0$44604$a1866201@visi.com>
Message-ID: <42112bb4$0$17746$626a14ce@news.free.fr>

* Grant Edwards <grante at visi.com> in comp.lang.python:
> Is there a library somewhere that impliments the IMAP protocol syntax?

Maybe the "core" part of getmail could be reused, it seems cleanly
written.
http://www.qcc.ca/~charlesc/software/getmail-4/

-- 
DW


From grante at visi.com  Tue Feb 22 10:44:03 2005
From: grante at visi.com (Grant Edwards)
Date: 22 Feb 2005 15:44:03 GMT
Subject: how can i read a mail using uid?
References: <1109058012.189388.302630@g14g2000cwa.googlegroups.com>
Message-ID: <421b5342$0$46526$a1866201@visi.com>

On 2005-02-22, Raghul <raghulj at gmail.com> wrote:

> I want to read the content of the mail and split it words using uid.If
> the word is found in my database I want to delete the mail using  its
> uid.

STOP POSTING THE SAME QUESTIONS IN A DOZEN DIFFERENT THREADS!

-- 
Grant Edwards                   grante             Yow!  I like the way ONLY
                                  at               their mouths move... They
                               visi.com            look like DYING OYSTERS


From steven.bethard at gmail.com  Mon Feb 21 17:07:59 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 21 Feb 2005 15:07:59 -0700
Subject: subclassing Decimal
In-Reply-To: <1109022264.823730.224910@o13g2000cwo.googlegroups.com>
References: <1109022264.823730.224910@o13g2000cwo.googlegroups.com>
Message-ID: <8sadneLa1dUmxoffRVn-uw@comcast.com>

jbauer at rubic.com wrote:
> I was interested in playing around with Decimal and
> subclassing it.  For example, if I wanted a special
> class to permit floats to be automatically converted
> to strings.
> 
>     from decimal import Decimal
> 
>     class MyDecimal(Decimal):
>         def __init__(self, value):
>             if isinstance(value, float):
>                 ... initialize using str(float) ...
> 
> In the classic days, I would have added something
> like this to MyDecimal __init__:
> 
>     Decimal.__init__(self, str(value))
> 
> But I'm unfamiliar with the __new__ protocol.

__new__ is called to create a new instance of the class.  It is a 
staticmethod that gets passed as its first parameter the class to be 
created.  You should be able to do something like[1]:

py> import decimal
py> class MyDecimal(decimal.Decimal):
...     def __new__(cls, value):
...         if isinstance(value, float):
...             value = str(value)
...         return super(MyDecimal, cls).__new__(cls, value)
...
py> MyDecimal(3.0)
Decimal("3.0")

STeVe

[1] If you're really afraid of super for some reason, you can replace 
the line:
     return super(MyDecimal, cls).__new__(cls, value)
with
     return decimal.Decimal.__new__(cls, value)


From wwproggemcom at aol.com  Sun Feb 27 18:57:41 2005
From: wwproggemcom at aol.com (progpro99)
Date: Sun, 27 Feb 2005 23:57:41 -0000
Subject: Python interfacing with other languages
Message-ID: <cvtmpl+279c@eGroups.com>


Hello all, I'm new to the group.  I wanted to start off introducing 
myself.  I live in Maimi, Florida USa.  I'm 18 currently working and 
going to college for computer science.

I've been hearing about Python and I see that it is starting to catch 
on so I decided I'm going to learn it.  I know that python can work 
with other languages like c/c++ and Java.  I even saw a group about 
getting Python in Delphi.  I know Perl and VB.  I know some PHP and 
some C/C++.  I was wondering can Python work with VB also?  If so is 
there a refernce you can send me the link too.

Also, some friends and I are trying to start a little programming 
community.  If you have some spare time doante a snippet or post on 
the forum, it would be appreciated.





From john at grulic.org.ar  Thu Feb 17 15:13:56 2005
From: john at grulic.org.ar (John Lenton)
Date: Thu, 17 Feb 2005 17:13:56 -0300
Subject: low-end persistence strategies?
In-Reply-To: <4214f9ba$0$832$8fcfb975@news.wanadoo.fr>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<4214f9ba$0$832$8fcfb975@news.wanadoo.fr>
Message-ID: <20050217201356.GQ2366@grulic.org.ar>

On Thu, Feb 17, 2005 at 09:08:25PM +0100, Pierre Quentel wrote:
> Maybe you'll find this too naive, but why do you want to avoid 
> concurrent accesses to a database that will be accessed 12 times a day ?

because every sunday at 3am your boss and his wife will both try to
use the script at the same time, and delete everything.

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
If our behavior is strict, we do not need fun!
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From alexrait at gmail.com  Tue Feb  1 16:48:40 2005
From: alexrait at gmail.com (alexrait1)
Date: 1 Feb 2005 13:48:40 -0800
Subject: how about writing some gui to a known console application
Message-ID: <1107294520.224155.131640@f14g2000cwb.googlegroups.com>

Do something useful... (at least for me)
For instance I need a gtk frontend for pgp.
So here you can have an opportunity to learn both pyGTK and pgp. A lot
of python code... :)



From rt-announce-bounces at lists.bestpractical.com  Sun Feb 13 17:43:52 2005
From: rt-announce-bounces at lists.bestpractical.com (rt-announce-bounces at lists.bestpractical.com)
Date: Sun, 13 Feb 2005 17:43:52 -0500
Subject: Your message to RT-Announce awaits moderator approval
Message-ID: <mailman.866.1108334632.22590.rt-announce@lists.bestpractical.com>

Your mail to 'RT-Announce' with the subject

    You are made active

Is being held until the list moderator can review it for approval.

The reason it is being held:

    Post by non-member to a members-only list

Either the message will get posted to the list, or you will receive
notification of the moderator's decision.  If you would like to cancel
this posting, please visit the following URL:

    http://lists.bestpractical.com/cgi-bin/mailman/confirm/rt-announce/57983dcbe673221226d200cf131c55023d34b811



From mefjr75 at hotmail.com  Mon Feb  7 00:34:50 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 6 Feb 2005 21:34:50 -0800
Subject: def __init__ question in a class definition
In-Reply-To: <mailman.2048.1107750192.22381.python-list@python.org>
References: <mailman.2048.1107750192.22381.python-list@python.org>
Message-ID: <1107754489.980148.277690@c13g2000cwb.googlegroups.com>

>Jeffrey Borkent
>Systems Specialist
>Information Technology Services

With that kind of credentials, and the fact that you claim you are a
system specialists....
I don't know you have me worried already.
I guess for you I just say RTFM.
If you think that is harsh then don't ask a 2nd grade question yet
claim/pretend to be some sorta system specialists.
You tried searching the archives first I am sure.
Go here  http://www.python.org and *read*, come back when you are
really stuck.
M.E.Farmer
P.S. YES the __ matter, they identify special methods ! __init__ is the
class CONSTRUCTOR.



From jzgoda at gazeta.usun.pl  Fri Feb 25 15:31:20 2005
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Fri, 25 Feb 2005 21:31:20 +0100
Subject: Best IDe
In-Reply-To: <0bvTd.52404$wc.42219@trnddc07>
References: <0bvTd.52404$wc.42219@trnddc07>
Message-ID: <cvo1vr$b33$4@atlantis.news.tpi.pl>

Jubri Siji napisa?(a):

> Please i am new to python , whats the best IDE to start with 

Vim, Emacs or jEdit.

-- 
Jarek Zgoda
http://jpa.berlios.de/ | http://www.zgodowie.org/


From alex at psi.com.au  Fri Feb 25 01:00:43 2005
From: alex at psi.com.au (Alex Le Dain)
Date: Fri, 25 Feb 2005 14:00:43 +0800
Subject: Trees
Message-ID: <421EBF0B.8050902@psi.com.au>

Is there a generic "tree" module that can enable me to sort and use 
trees (and nodes). Basically having methods such as .AddNode(), 
.GetAllChildren(), .FindNode() etc.

Is this handled natively with any of the core modules?

cheers, Alex.

-- 
Poseidon Scientific Instruments Pty Ltd
1/95 Queen Victoria St
FREMANTLE  WA, AUSTRALIA

Ph: +61 8 9430 6639     Fx: +61 8 9335 4650
Website:  www.psi.com.au

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unauthorised. If you have received this email in error, please 
immediately delete it and any copies of it from your system and notify 
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attached files re-supplied.


From ncoghlan at iinet.net.au  Fri Feb 11 08:47:38 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 11 Feb 2005 23:47:38 +1000
Subject: PyINI : Cross-Platform INI parser
In-Reply-To: <cuhvud$7gm$1@swifty.westend.com>
References: <cuhiak$2gl8$1@mail.cn99.com> <cuhvud$7gm$1@swifty.westend.com>
Message-ID: <420CB77A.7050405@iinet.net.au>

Peter Maas wrote:
> I think that a new config utility is worth the effort if it has the
> potential to put an end to roll-your-own config formats and parsers.
> 

http://www.python.org/moin/ConfigParserShootout

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From spiralx at gmail.com  Wed Feb  9 14:20:54 2005
From: spiralx at gmail.com (James)
Date: Wed, 9 Feb 2005 19:20:54 +0000
Subject: A great Alan Kay quote
In-Reply-To: <420a5c1e$0$21630$a1866201@visi.com>
References: <420a5c1e$0$21630$a1866201@visi.com>
Message-ID: <7ee3dcd805020911202c192cc9@mail.gmail.com>

Surely

"Perl is another example of filling a tiny, short-term need, and then
being a real problem in the longer term."

is better lol ;)


On Wed, 09 Feb 2005 11:00:32 -0800 (PST), Grant Edwards <grante at visi.com> wrote:
> In an interview at http://acmqueue.com/modules.php?name=Content&pa=showpage&pid=273
> Alan Kay said something I really liked, and I think it applies
> equally well to Python as well as the languages mentioned:
> 
>     I characterized one way of looking at languages in this
>     way: a lot of them are either the agglutination of features
>     or they're a crystallization of style. Languages such as
>     APL, Lisp, and Smalltalk are what you might call style
>     languages, where there's a real center and imputed style to
>     how you're supposed to do everything.
> 
> I think that "a crystallization of style" sums things up nicely.
> The rest of the interview is pretty interesting as well.
> 
> --
> Grant Edwards                   grante             Yow!  Look!! Karl Malden!
>                                   at
>                                visi.com
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From just at xs4all.nl  Wed Feb  2 10:51:36 2005
From: just at xs4all.nl (Just)
Date: Wed, 02 Feb 2005 16:51:36 +0100
Subject: Hey, get this!  [was: import from database]
References: <mailman.1509.1106923923.22381.python-list@python.org>
	<ctdlpq$ukf$00$1@news.t-online.com>
	<k%WKd.98003$Jk5.87621@lakeread01> <4200E5CB.6020508@holdenweb.com>
Message-ID: <just-485CAF.16513602022005@news1.news.xs4all.nl>

In article <4200E5CB.6020508 at holdenweb.com>,
 Steve Holden <steve at holdenweb.com> wrote:

> Just to make things simpler, and (;-) to appeal to a wider audience, 
> here is a program that doesn't use database at all (it loads the entire 
> standard library into a dict) and still shows the error.
> 
> What *I* would like to know is: who is allowing the import of bsddb.os, 
> thereby somehow causing the code of the os library module to be run a 
> second time.
[ ... ]

Maybe this?:
>          if package:
>              module.__path__ = sys.path

I'm fairly sure this should read

   module.__path__ = ["*db*"]

Just


From mwm at mired.org  Sat Feb 26 20:28:23 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 26 Feb 2005 19:28:23 -0600
Subject: Converting HTML to ASCII
References: <20050225185147.43095.qmail@web20703.mail.yahoo.com>
	<mailman.3068.1109361513.22381.python-list@python.org>
	<86is4gfim2.fsf@guru.mired.org>
	<mailman.3072.1109374334.22381.python-list@python.org>
Message-ID: <86ekf2g5ag.fsf@guru.mired.org>

Michael Spencer <mahs at telcopartners.com> writes:

> Mike Meyer wrote:
>
>> It also fails on tags with a ">" in a string in the tag. That's
>> well-formed but ill-used HTML.
>>             <mike
> True enough...however, it doesn't fail too horribly:
>   >>> striptags("""<sometag attribute = '>'>the text</sometag>""")
>   "'>the text"
>   >>>

Depends on your example:

<sometage attribute='>' otherattribute='otherstuff' moreattribute='yet
more stuff'>

and so on. Then again, early browsers actually did the same kind of
parsing as you do, so this type of thing is discouraged.

> and I think that case could be rectified rather easily, by stripping
> any content up to '>' in the result without breaking anything else.

Yes, but then what happens with:

     <sometag>>text</sometag>

?

        <mike

-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From irmen.NOSPAM at xs4all.nl  Fri Feb 18 16:52:50 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Fri, 18 Feb 2005 22:52:50 +0100
Subject: unicode and socket
In-Reply-To: <42166231$0$28988$e4fe514c@news.xs4all.nl>
References: <1108753426.318777.275250@c13g2000cwb.googlegroups.com>
	<opsmeqf1w76yt6e7@news.cisco.com>
	<42166231$0$28988$e4fe514c@news.xs4all.nl>
Message-ID: <421664a2$0$28988$e4fe514c@news.xs4all.nl>

Irmen de Jong wrote:
> aurora wrote:
> 
>> You could not. Unicode is an abstract data type. It must be encoded 
>> into  octets in order to send via socket. And the other end must 
>> decode the  octets to retrieve the unicode string. Needless to say the 
>> encoding scheme  must be consistent and understood by both ends.
> 
> 
> So use pickle.
> 
> --Irmen

Well, on second thought: don't use pickle.
If all you want to transfer is unicode strings (or normal strings)
it's safer to just encode them to, say, UTF-8, transfer
that octet stream across, and on the other side, decode the
UTF-8 octets back into a unicode string.


--Irmen


From dave at pythonapocrypha.com  Wed Feb 23 17:35:14 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Wed, 23 Feb 2005 15:35:14 -0700
Subject: Python and "Ajax technology collaboration"
In-Reply-To: <1109193970.029421.213490@l41g2000cwc.googlegroups.com>
References: <1109193970.029421.213490@l41g2000cwc.googlegroups.com>
Message-ID: <421D0522.4010807@pythonapocrypha.com>

John Willems wrote:
> Interesting GUI developments, it seems. Anyone developed a "Ajax"
> application using Python? Very curious....
> 
> thx
> 
> (Ajax stands for:
> XHTML and CSS;
> dynamic display and interaction using the Document Object Model;
> data interchange and manipulation using XML and XSLT;
> asynchronous data retrieval using XMLHttpRequest;
> and JavaScript binding everything together

We're using it in a couple of projects with Zope as the backend and it works 
really well - the web applications are way more responsive now (I'm hoping 
someone with lots of Zope knowledge will redo the ZMI itself using this approach).

-Dave


From theller at python.net  Thu Feb  3 12:51:51 2005
From: theller at python.net (Thomas Heller)
Date: Thu, 03 Feb 2005 18:51:51 +0100
Subject: Where is WSAEnumNetworkEvents???
References: <1107376894.420724.260230@c13g2000cwb.googlegroups.com>
	<mailman.1821.1107446386.22381.python-list@python.org>
Message-ID: <is59bkg8.fsf@python.net>

Dave Brueck <dave at pythonapocrypha.com> writes:

> elbertlev at hotmail.com wrote:
>> I was trying to write an asyncronous TCP server for win32 using
>> WSAEventSelect (which lives if win32file). Such events require
>> WaitForMultipleObjects (which lives if win32event) and
>> WSAEnumNetworkEvents WHICH IS NOT EXPOSED. This makes WSAEventSelect
>> useless. Does somebody know how to add the WSAEnumNetworkEvents and
>> WSANetwotkEvents structure win32file?
>>  Maybe I'm missing something?
>
> You could both build the structures and call the functions in ctypes
> (http://starship.python.net/crew/theller/ctypes/)
>
> [untested code follows]
>
> from ctypes import *
> class WSANETWORKEVENTS(Structure):
>      _fields_ = [('lNetworkEvents', c_long),
>                  ('iErrorCode', c_int * 10) # 10 = FD_MAX_EVENTS
>                 ]
>
> You'd access the API via windll.ws2_32.WSAEnumNetworkEvents, e.g.
>
> networkEvents = WSANETWORKEVENTS()
> i = windll.ws2_32.WSAEnumNetworkEvents(s, hEventObject, byref(networkEvents))
> if i != 0:
>      # Handle an error

Yes. And the day is not too far away (hopefully), that you'll be able to
generate the wrapper code automatically:

<snip>
  c:\sf\ctypes\sandbox\tools\codegen>h2xml winsock2.h -o winsock2.xml -q
  skipped #define SNDMSG ::SendMessage FunctionType
  c:\sf\ctypes\sandbox\tools\codegen>xml2py winsock2.xml -q -w -d -s WSAEnumNetworkEvents
  # generated by 'xml2py'
  # flags 'winsock2.xml -w -d -s WSAEnumNetworkEvents'
  from ctypes import *
  from ctypes import decorators
  
  class _WSANETWORKEVENTS(Structure):
      # C:/PROGRA~1/MICROS~3.NET/Vc7/PLATFO~1/Include/winsock2.h 1041
      pass
  ws2_32 = CDLL('ws2_32')
  
  @ decorators.stdcall(c_int, ws2_32, [c_uint, c_void_p, POINTER(_WSANETWORKEVENTS)])
  def WSAEnumNetworkEvents(p1, p2, p3):
      # C:/PROGRA~1/MICROS~3.NET/Vc7/PLATFO~1/Include/winsock2.h 2706
      return WSAEnumNetworkEvents._api_(p1, p2, p3)
  
  _WSANETWORKEVENTS._fields_ = [
      # C:/PROGRA~1/MICROS~3.NET/Vc7/PLATFO~1/Include/winsock2.h 1041
      ('lNetworkEvents', c_long),
      ('iErrorCode', c_int * 10),
  ]
  assert sizeof(_WSANETWORKEVENTS) == 44, sizeof(_WSANETWORKEVENTS)
  assert alignment(_WSANETWORKEVENTS) == 4, alignment(_WSANETWORKEVENTS)
  
  c:\sf\ctypes\sandbox\tools\codegen>
<snip/>


Thomas


From abuse at solumslekt.org  Thu Feb 17 04:19:27 2005
From: abuse at solumslekt.org (Leif B. Kristensen)
Date: Thu, 17 Feb 2005 10:19:27 +0100
Subject: [newbie]How to install python under DOS and is there any
	Wxpython can be installed under dos?
References: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
	<1108557065.547230.254540@z14g2000cwz.googlegroups.com>
	<b9-dnTQOwoYK647fRVn-2Q@rogers.com>
	<11172sa1sg2svc8@corp.supernews.com>
	<l4OdneC_7ZH2oInfRVn-3A@rogers.com>
Message-ID: <zkZQd.9062$Sl3.275762@news4.e.nsc.no>

john san skrev:

> Actually the "windows" running very good under the xbox-NTOS via
> xboxmediacenter. its just limited functions(not easy to programming
> the "windows" prog.), if we can find WxPython-like can be ported (I
> can import *
> from it  to my xboxPython) )it will be a great great ......... You
> will have HD screen and web surfing on HDTV and computing on HDTV.
> think about it! That is a real thing the python-like lang. should to
> do otherwise just a garbage(toy).

You can run Linux with MythTV on an XBox. Does all the things you want,
and of course it will run WxPython.
-- 
Leif Biberg Kristensen



From kartic.krishnamurthy at gmail.com  Fri Feb  4 11:35:55 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 4 Feb 2005 08:35:55 -0800
Subject: Thread in python
In-Reply-To: <4rNMd.103073$Jk5.93452@lakeread01>
References: <1107533540.641969.191940@z14g2000cwz.googlegroups.com>
	<1107534038.823409.89650@l41g2000cwc.googlegroups.com>
	<4rNMd.103073$Jk5.93452@lakeread01>
Message-ID: <1107534954.988794.303330@o13g2000cwo.googlegroups.com>

Ah! I forgot about this link.... the slideshow is very informative.



From gandalf at geochemsource.com  Tue Feb  8 08:23:03 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Tue, 08 Feb 2005 14:23:03 +0100
Subject: How to keep a module with the same name as a module it is
 importing from importing itself?
In-Reply-To: <1107866562.822745.53480@o13g2000cwo.googlegroups.com>
References: <1107866562.822745.53480@o13g2000cwo.googlegroups.com>
Message-ID: <4208BD37.90001@geochemsource.com>


>In my package, myapp, I have a module, logging.py.  That module,
>naturally, imports the library module logging with an 'import logging'
>statement.  However, when I use 'import myapp.logging' in my script,
>the myapp.logging module tries to import itself rather than the library
>logging module.
>
>How can I prevent this from happening other than using a name that
>doesn't conflict?
>  
>

Did you try the built-in 'imp' module?

http://docs.python.org/lib/module-imp.html

I believe that 'load_module' is your very best friend. :-)

Another idea: rename your modules so they do not conflict with standard 
modules.
Best,

   Laci 2.0


-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From cdieterich at geosci.uchicago.edu  Thu Feb  3 12:43:07 2005
From: cdieterich at geosci.uchicago.edu (Christian Dieterich)
Date: Thu, 3 Feb 2005 11:43:07 -0600
Subject: SysV IPC message queues
In-Reply-To: <1107419374.385346.131940@f14g2000cwb.googlegroups.com>
Message-ID: <10A2FF97-760B-11D9-8525-000A9582377C@geosci.uchicago.edu>

On D?ardaoin, Feabh 3, 2005, at 02:29 America/Chicago, Aki Niimura 
wrote:

> Hello everyone.
>
> I'm trying to control a program from a Python program using IPC.
> Although using a socket is a common choice for such applications, I
> would like
> to use SysV message queues because I don't need to parse the stream.
>
> I thought Python had a support of SysV message queues (I have found
> almost
> anything I need in Python library modules so far).
> But Python library seems not supporting SysV message queues yet.
>
> I'm thinking of calling a C function from Python but it seems not so
> easy.

Although this might not be the most elegant way to do what you want, 
it's relatively easy to make a C function work with Python. Have a look 
at http://www.swig.org/

Swig writes a C/Python wrapper for your C code which can be compiled 
into a shared object library. Then you can import that in Python. Swig 
is also (rudimentary) supported by distutils, so you don't even need to 
deal with the generation of the library.

Christian

Example:

 > cat src/SomeModule.i
%module SomeModuleLib
%{
#include "SomeModule.h"
%}
%include src/SomeModule.c

 > swig -python src/SomeModule.i
 > gcc -I/sw/include/python2.3 -c src/SomeModule.c -o SomeModule.o
 > gcc -I/sw/include/python2.3 -c src/SomeModule_wrap.c -o 
SomeModule_wrap.o
 > gcc -L/sw/lib -bundle -flat_namespace -undefined suppress 
SomeModule.o SomeModule_wrap.o -o _SomeModuleLib.so

or automatic build from setup.py

from distutils.core import setup, Extension
import os, glob
srcfiles = glob.glob(os.path.join('src', '*.[ci]'))
setup(name="SomePackage",
       package_dir={"SomePackage": "lib"},
       packages=["SomePackage"],
       ext_modules=[Extension("SomePackage._SomeModuleLib", 
srcfiles,),],)

 >>> import SomeModuleLib



From cam.ac.uk at mh391.invalid  Sun Feb 13 21:24:06 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Mon, 14 Feb 2005 02:24:06 +0000
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cuo71l$gig$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
Message-ID: <cup249$svu$1@gemini.csx.cam.ac.uk>

Ilias Lazaridis wrote:

> a) Why does the Python Foundation not provide additionally a binary 
> version, compiled with MinGW or another open-source compiler?

I use a binary version of Python compiled with an open-source compiler
on Windows that was provided by someone else.

> b) Why does the Python Foundation not ensure, that the python 
> source-code is directly compilable with MinGW?

Why should they? It already runs on Windows with a freely available
compiler.

> f) Are there any official (Python Foundation) statements / rationales 
> available, which explain why the MinGW compiler is unsupported, although 
> parts of the community obviously like to use it?

Not to my knowledge. But I would guess because supporting it would
obviously be a lot of work and the core developers have other things to
do they consider more important. They are volunteers, you know.

Why don't you solve this problem and produce a patched version of
Python that does what you want.

> [google is _not_ a fried here. I like to have a stable development 
> environment, which is supported by the official projects, thus it can 
> pass quality-assurance without beeing afraid about every next release.]

Then you have several options:

a) use a supported development environment
b) do the work yourself to support MinGW
c) pay someone else to do the work

But don't act like the volunteers who develop Python owe you a version
of Python that runs out of the box on MinGW. They don't, anymore than you
owe *me* a version of Python that runs out of the box on MinGW.

Now why haven't *you* produced a version of Python that is directly
compileable with MinGW? Time's a-wasting.
-- 
Michael Hoffman


From jeremy+plusnews at jeremysanders.net  Fri Feb 25 12:31:03 2005
From: jeremy+plusnews at jeremysanders.net (Jeremy Sanders)
Date: Fri, 25 Feb 2005 17:31:03 +0000
Subject: Splitting strings - by iterators?
References: <pan.2005.02.25.15.55.31.77881@jeremysanders.net>
	<Be2dnWSlIL6MxILfRVn-1Q@comcast.com>
Message-ID: <pan.2005.02.25.17.31.03.601511@jeremysanders.net>

On Fri, 25 Feb 2005 10:57:59 -0600, Larry Bates wrote:

> How did you get the string in memory in the first place?

They're actually from a generated python script, acting as a saved file
format, something like:

interpret("""
lots of lines
""")
another_command()

Obviously this isn't the most efficient format, but it's nice to
encapsulate the data and the script into one file.

Jeremy



From max at alcyone.com  Sun Feb 20 20:04:40 2005
From: max at alcyone.com (Erik Max Francis)
Date: Sun, 20 Feb 2005 17:04:40 -0800
Subject: exercise: partition a list by equivalence
In-Reply-To: <1108931725.251996.56210@c13g2000cwb.googlegroups.com>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<1108814276.680736.264380@l41g2000cwc.googlegroups.com>
	<1108849063.857663.279920@c13g2000cwb.googlegroups.com>
	<mailman.2856.1108900770.22381.python-list@python.org>
	<1108931725.251996.56210@c13g2000cwb.googlegroups.com>
Message-ID: <KKOdnSJVU781roTfRVn-3w@speakeasy.net>

John Machin wrote:

> Xah is asserting his right to be recognised as the author of his
> artistic creations, line by line.

Not very well, however, since his usage doesn't constitute a valid 
copyright notice :-).

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   Wyrd has swept all my kin / all the brave chiefs away! / Now I must
   follow them! -- Beowulf


From caleb.hattingh at gmail.com  Tue Feb  8 01:37:36 2005
From: caleb.hattingh at gmail.com (Caleb Hattingh)
Date: 7 Feb 2005 22:37:36 -0800
Subject: Multiple constructors
In-Reply-To: <mailman.2067.1107780864.22381.python-list@python.org>
References: <6SjNd.38337$K7.21639@fe2.news.blueyonder.co.uk>
	<AinNd.38406$K7.14757@fe2.news.blueyonder.co.uk>
	<opsls67jst1js0xs@news.telkomsa.net>
	<mailman.2067.1107780864.22381.python-list@python.org>
Message-ID: <1107844656.560243.211710@l41g2000cwc.googlegroups.com>

Sure, Nick, I agree with you completely.

I generally try to make sure that my classes are limited in what they
do/provide, so it is not often a problem that a class may need to be
instantiated in several very different ways.

But your point is well taken.

Thanks
Caleb



From nick at craig-wood.com  Mon Feb 14 13:30:01 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 14 Feb 2005 18:30:01 GMT
Subject: [PATCH] allow partial replace in string.Template
References: <cuq0dl$opq$1@lnx107.hrz.tu-darmstadt.de>
	<mailman.2525.1108384043.22381.python-list@python.org>
Message-ID: <slrnd11od8.via.nick@irishsea.home.craig-wood.com>

Nick Coghlan <ncoghlan at iinet.net.au> wrote:
> 
>  a) Patches are more likely to be looked at if placed on the SF patch tracker.
> 
>  b) I don't quite see the point, given how easy these are to spell using the 
>  basic safe_substitute. You're replacing one liners with one-liners.

c) add a documentation patch

d) add a test suite patch

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


From claird at lairds.us  Fri Feb 25 15:08:03 2005
From: claird at lairds.us (Cameron Laird)
Date: Fri, 25 Feb 2005 20:08:03 GMT
Subject: Flushing print()
References: <mailman.3029.1109296238.22381.python-list@python.org>
	<cvm2s2$2gfl$1@agate.berkeley.edu>
Message-ID: <d9c4f2-sv9.ln1@lairds.us>

In article <cvm2s2$2gfl$1 at agate.berkeley.edu>,
Daniel Yoo  <dyoo at hkn.eecs.berkeley.edu> wrote:
>gf gf <unknownsoldier93 at yahoo.com> wrote:
			.
			.
			.
>: If not, how can I flush it manually?  sys.stdout.flush() didn't
>: seem to work.
>
>Hmmmm, that's odd.  sys.stdout.flush() should do it.  How are you
>testing that stdout isn't flushing as you expect?
>
>
>Best of wishes to you!

gf, remember to write

  sys.stdout.flush()

rather than

  sys.stdout.flush

That's a mistake that catches many.


From eurleif at ecritters.biz  Tue Feb  8 18:41:54 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Tue, 08 Feb 2005 18:41:54 -0500
Subject: What's wrong with `is not None`?
In-Reply-To: <mailman.2219.1107903975.22381.python-list@python.org>
References: <mailman.2219.1107903975.22381.python-list@python.org>
Message-ID: <36t0v9F56r1sbU1@individual.net>

Frans Englich wrote:
> runner.py:587: Using is not None, may not always work

It's a PyChecker bug relating to None being a constant in 2.4: 
<http://tinyurl.com/6dexc>.


From joannis.courtis at gmx.de  Wed Feb 23 19:08:21 2005
From: joannis.courtis at gmx.de (Courtis Joannis)
Date: Thu, 24 Feb 2005 01:08:21 +0100 (MET)
Subject: Question about logfiles in Python
Message-ID: <12380.1109203701@www15.gmx.net>

Hello readers,

my name is Joannis Courtis and I study computer science in
Frankfurt/Germany. I hope you can help me, because I try to find a script
that helps me to filter logfiles which I received from the Microsoft
Exchange Server.
Can you help me, where I can find a script in Python.

Regards Joannis Courtis

-- 
Lassen Sie Ihren Gedanken freien Lauf... z.B. per FreeSMS
GMX bietet bis zu 100 FreeSMS/Monat: http://www.gmx.net/de/go/mail


From http  Mon Feb 14 15:22:08 2005
From: http (Paul Rubin)
Date: 14 Feb 2005 12:22:08 -0800
Subject: is there a safe marshaler?
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<1108051828.483222.62670@z14g2000cwz.googlegroups.com>
Message-ID: <7xmzu6q4cv.fsf@ruckus.brouhaha.com>

"guido at python.org" <gvanrossum at gmail.com> writes:
> > Pickle and marshal are not safe. They can do harmful things if fed
> > maliciously constructed data.  That is a pity, because marshal is fast.
> 
> I think marshal could be fixed; the only unsafety I'm aware of is that
> it doesn't always act rationally when confronted with incorrect input
> like bad type codes or truncated input. It only receives instances of
> the built-in types and it never executes user code as a result of
> unmarshalling.

There's another issue with marshal that makes it unsuitable for Pyro,
which is that its data format is (for legitimate reasons) not
guaranteed to be the same across different Python releases.  That
means that if the two ends of the Pyro application aren't using the
same Python version, they might not be able to interoperate.

I don't remember if marshal strings contain a version number.  If they
do, then the non-interoperating versions can notice the
incompatibility and raise an appropriate error.  If they don't, then
undefined behavior and possible security holes could result, unless
Pyro takes special measures to notice the possibility.

See SF bugs #467384 and #471893 for some further discussion.


From jerf at jerf.org  Fri Feb 11 21:22:08 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 11 Feb 2005 21:22:08 -0500
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<4207c8db$0$21623$a1866201@visi.com>
	<cub12p$pke$1@achot.icm.edu.pl>
	<36sip2F56jjmaU1@individual.net> <umzubw8xg.fsf@vh-s.de>
	<pan.2005.02.11.11.43.56.884015@jerf.org>
	<374826F5851cbU1@individual.net>
	<pan.2005.02.11.13.12.44.276464@jerf.org>
	<cujchp$oh7$1@news1.ucsd.edu>
Message-ID: <pan.2005.02.12.02.22.08.617190@jerf.org>

On Fri, 11 Feb 2005 14:45:09 -0800, Robert Kern wrote:
> Until such matters are unequivocally determined in a court that has
> jurisdiction over you, do you really want to open yourself to legal risk
> and certain ill-will from the community?

Huh? What are you talking about?

I'm just pointing out the inability of the law to handle it. I have no
intention of doing anything with it, except inasmuch as it makes it
difficult to license my own works since I don't believe any license works.
(But I use the LGPL anyways.)


From dbeech at bigpond.net.au  Thu Feb 10 04:15:40 2005
From: dbeech at bigpond.net.au (Dave Beech)
Date: Thu, 10 Feb 2005 19:45:40 +1030
Subject: Python-list Digest, Vol 13, Issue 102
References: <20041006143440.CC5491E4005@bag.python.org>
Message-ID: <040a01c50f51$1f8366c0$0100000a@vic.bigpond.net.au>


----- Original Message -----
From: <python-list-request at python.org>
To: <python-list at python.org>
Sent: Thursday, October 07, 2004 1:04 AM
Subject: Python-list Digest, Vol 13, Issue 102


> Send Python-list mailing list submissions to
> python-list at python.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://mail.python.org/mailman/listinfo/python-list
> or, via email, send a message with subject or body 'help' to
> python-list-request at python.org
>
> You can reach the person managing the list at
> python-list-owner at python.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Python-list digest..."
>


----------------------------------------------------------------------------
----


> Today's Topics:
>
>    1. Re: Python Macros (Carlos Ribeiro)
>    2. Re: Python Macros (gabriele renzi)
>    3. Re: Python Macros (gabriele renzi)
>    4. Re: Python Macros (Alex Martelli)
>    5. Re: Parallelization on muli-CPU hardware? (Nick Craig-Wood)
>    6. Re: Job postings (Larry Bates)
>    7. Re: Embedding python with debugging features (Wolfgang Langner)
>    8. Re: re bug (Gustavo Niemeyer)
>    9. How to improve extracting data speed (Yong Wang)
>   10. Re: Parallelization on muli-CPU hardware? (?????? ???????????)
>   11. Re: metaclass and customization with parameters (Gustavo Niemeyer)
>


----------------------------------------------------------------------------
----


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




From kent37 at tds.net  Sun Feb 13 14:26:52 2005
From: kent37 at tds.net (Kent Johnson)
Date: Sun, 13 Feb 2005 14:26:52 -0500
Subject: changing __call__ on demand
In-Reply-To: <cuo0e1$4l2$1@lnx107.hrz.tu-darmstadt.de>
References: <cuo0e1$4l2$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <420fa70f$1_2@newspeer2.tds.net>

Stefan Behnel wrote:
> Hi!
> 
> This somewhat puzzles me:
> 
> Python 2.4 (#1, Feb  3 2005, 16:47:05)
> [GCC 3.3.4 (pre 3.3.5 20040809)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> 
> .>>> class test(object):
> ...   def __init__(self):
> ...     self.__call__ = self.__call1
> ...   def __call1(self):
> ...     print 1
> ...   def __call__(self):
> ...     print 2
> ...
> .>>> t = test()
> .>>> t()
> 2
> 

It works the way you want if test is an old-style class:
  >>> class test:
  ...  def __init__(self):
  ...    self.__call__ = self.__call1
  ...  def __call1(self):
  ...    print 1
  ...  def __call__(self):
  ...    print 2
  ...
  >>> t=test()
  >>> t()
1

Kent


From ncoghlan at iinet.net.au  Sat Feb 12 22:30:07 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 13 Feb 2005 13:30:07 +1000
Subject: namespaces module (a.k.a. bunch, struct, generic object, etc.)
 PEP
In-Reply-To: <420DB64E.9020000@iinet.net.au>
References: <GaudndOHLML3M5bfRVn-vg@comcast.com>	<mailman.2383.1108124347.22381.python-list@python.org>	<LvSdnbe2vZhv2ZDfRVn-tQ@comcast.com>	<mailman.2436.1108183031.22381.python-list@python.org>	<fcadnXgIes3QBJDfRVn-uA@comcast.com>
	<420DB64E.9020000@iinet.net.au>
Message-ID: <420EC9BF.5020802@iinet.net.au>

Yeah, talking to myself again. I had a couple of further thoughts on how to do 
things in an inheritance friendly way. . .

Firstly, for Namespaces handling of special names, I think it would be good to 
make it easy for subclasses to change the sets of names that are handled using 
either Namespace lookup or standard Python lookup.

The simplest way is to make the method that performs the check an instance method.

     class Namespace(object):
         # etc
         def _is_special_name(name):
             return name.startswith("__") and name.endswith("__")

I also think subclasses should be able to affect update() just by defining 
__setattr__ (for example, my LockedView class forgot to deal with update()). So 
I'd replace the calls to self.__dict__.update(other) with calls to 
type(self)._update_dict(self, other):

     class Namespace(object):
         # etc
         def _update_dict(self, other):
             for k in other:
                 setattr(self, k, other[k])

Finally, it might be nice if the get/set/del methods special-cased names with 
dots in them. Consider the following with a normal class:

Py> class C(object): pass
...
Py> c = C()
Py> c.x = C()
Py> setattr(c, "x.y", 1)
Py> getattr(c, "x.y")
1
Py> vars(c.x)
{}
Py> vars(c)
{'x.y': 1, 'x': <__main__.C object at 0x009E0A10>}
Py> c.x.y
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
AttributeError: 'C' object has no attribute 'y'

With a namespace, we can make the dotted access 'just work':

Py> ns = namespaces.Namespace()
Py> ns.x = C()
Py> ns.y = namespaces.Namespace()
Py> setattr(ns, "x.y", C())
Py> setattr(ns, "x.y.z", 1)
Py> setattr(ns, "y.x", C())
Py> setattr(ns, "y.x.z", 2)
Py> vars(ns)
{'y': Namespace(x=<__main__.C object at 0x009EB8D0>), 'x': <__main__.C object at
  0x009EB1F0>}
Py> vars(ns.x)
{'y': <__main__.C object at 0x009EB890>, 'y.z': 1}
Py> vars(ns.y)
{'x': <__main__.C object at 0x009EB8D0>}
Py> vars(ns.y.x)
{'z': 2}

Combined with the update change, it means this code does the right thing:

Py> settings = {
... "x" : 1,
... "y" : namespaces.Namespace(),
... "y.z" : 1,
... "y.x" : "Hi there!",
... }
Py> ns = namespaces.Namespace(settings)
Py> ns
Namespace(x=1, y=Namespace(x='Hi there!', z=1))

Rather than sending it again, I've posted my current code at:
http://members.iinet.net.au/~ncoghlan/public/namespaces.py

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From itsme at yahoo.com  Fri Feb 25 00:09:27 2005
From: itsme at yahoo.com (It's me)
Date: Fri, 25 Feb 2005 05:09:27 GMT
Subject: Pythoncard - Mistake in walkthrough?
References: <e0f0f902.0502230849.3441e26a@posting.google.com>
	<rq5Td.6562$OU1.2627@newssvr21.news.prodigy.com>
	<e0f0f902.0502232113.2711a809@posting.google.com>
Message-ID: <bqyTd.7039$OU1.1193@newssvr21.news.prodigy.com>

No, those are old still.


"Deltones" <vibroverb at hotmail.com> wrote in message
news:e0f0f902.0502232113.2711a809 at posting.google.com...
> > As stated in the on-line WalkThrough, the information there was written
for
> > an older version of the program.
> >
> <snipped for brevity>
>
> Hi,
>
> I understand, but the walkthrough I'm doing comes from the doc folder
> of the latest windows package. I thought that the walkthrough were
> updated to fit the newest version. Thanks though.
>
> Denis




From phd at mail2.phd.pp.ru  Fri Feb 11 13:39:04 2005
From: phd at mail2.phd.pp.ru (Oleg Broytmann)
Date: Fri, 11 Feb 2005 21:39:04 +0300
Subject: mxCGIPython binaries for Python 2.3.5
In-Reply-To: <20050211181320.GA23241@caltech.edu>
References: <20050211154457.GA23787@phd.pp.ru>
	<20050211181320.GA23241@caltech.edu>
Message-ID: <20050211183904.GA28714@phd.pp.ru>

On Fri, Feb 11, 2005 at 10:13:21AM -0800, Titus Brown wrote:
> what does mxCGIPython do?  I can't find anything at that Web site that

   http://www.egenix.com/files/python/mxCGIPython.html

> doesn't involve downloading & unpacking a file.

   It is unpackable, ready-to-run python binary.

PS. I am neither author nor maintainer, I only provide binaries for
some platforms...

Oleg.
-- 
     Oleg Broytmann            http://phd.pp.ru/            phd at phd.pp.ru
           Programmers don't die, they just GOSUB without RETURN.


From walter_burleigh at yahoo.de  Sat Feb 12 04:05:51 2005
From: walter_burleigh at yahoo.de (Walter Burleigh)
Date: Sat, 12 Feb 2005 10:05:51 +0100
Subject: PHP session equivalent?
References: <420d6010$1@nntp.zianet.com>
Message-ID: <cukgrl$g6k$1@sagnix.uni-muenster.de>

Erik Johnson wrote:

>     There are a lot of things about PHP I was not too keen on and hence
>     why
> my company is primarily doing Python these days, but one thing I was quite
> impressed with was the ease with which it provided session
> functionality...

Like you I think it is a big plus of PHP as a beginner's web development
tool that it provides session management out of the box. It would certainly
make python more attractive for beginners if they could use session
management out of the box, too. (I know that there are lots of web
development frameworks, but they are to be too difficult to learn, if you
are new to web development).

There is no module for session management in the python standard library.
But there are lots of python frameworks that would do this job well (my
favorite: cherrypy). If you think that a whole framework would be overkill,
you either could try to recylce the session part of an existing framework,
or you could write a module for yourself. 

I have written a module which is quite similar to the php session
management, except for that it does no url rewriting when cookies are not
allowed. If you are interested, I will mail you a copy.



From usenet_spam at janc.invalid  Mon Feb  7 20:33:10 2005
From: usenet_spam at janc.invalid (JanC)
Date: Tue, 08 Feb 2005 01:33:10 GMT
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<s5RNd.104904$Jk5.38565@lakeread01>
	<1107815270.149109.80420@c13g2000cwb.googlegroups.com>
Message-ID: <Xns95F719F82424JanC@213.118.79.171>

Kartic schreef:

> In any case, let's say I use Python to create an application that uses
> some module that is GPL. So what are my options?

For your own personal use: doesn't mather.

If you want to distribute it, your application must be GPL'ed, so *all* 
source code must be made available for those you distribute it to.

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From max at alcyone.com  Sat Feb 12 19:37:27 2005
From: max at alcyone.com (Erik Max Francis)
Date: Sat, 12 Feb 2005 16:37:27 -0800
Subject: help please
In-Reply-To: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
References: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
Message-ID: <a-ydnSC3VNPaPJPfRVn-jQ@speakeasy.net>

gargonx at gmail.com wrote:

> UnboundLocalError: local variable 't2' referenced before assignment

	...

> t2=""
> 
> def Proc(text): # "text" is some random text or use OrigText
>     for word in text:
>         for letter in word:
>             if letter in std.keys():
>                 letter=std[letter]
>                 t2=t2+letter  # the problem is referene to this
>             elif letter in ext.keys():
>                 letter=ext[letter]
>                 t2=t2+letter
>             elif letter in punc.keys():
>                 letter=punc[letter]
>                 t2=t2+letter
> 
> can anyone figure out why t2 is not being used properly?

The problem is that you're not making it clear to Python that you want 
the t2 mentioned in Proc to reference the global t2, rather than a 
local.  It's concluding the latter, whereas you mean the former.  You 
can probably see that as a local, t2 is indeed referenced before it's 
assigned (t2 = t2 + letter).  The fix is to declare t2 global at the top 
of Proc:

	def Proc(text):
	    global t2
	    ...

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   I am become death, the destroyer of worlds.
   -- J. Robert Oppenheimer (quoting Hindu legend)


From cpu.crazy at gmail.com  Mon Feb 21 16:01:54 2005
From: cpu.crazy at gmail.com (Joseph Quigley)
Date: Mon, 21 Feb 2005 15:01:54 -0600
Subject: A few q's on python files.
Message-ID: <6.1.0.6.2.20050221145825.01e79150@pop.gmail.com>

hiya,
i'm new to python (by a week) but am learning fast (that's what I like 
about python--it's simplicity). I got disgusted with C and C++ (i was 
learning) probably because of a bad copy of Visual C++ 6.0 that gave me errors.

I noticed that IDLE doesn't have an option to allow you to convert a .py or 
pyc. file into an executable. Why? Am i wrong? Where can I find one (if I'm 
right)?



From elbertlev at hotmail.com  Wed Feb  2 15:41:34 2005
From: elbertlev at hotmail.com (elbertlev at hotmail.com)
Date: 2 Feb 2005 12:41:34 -0800
Subject: Where is WSAEnumNetworkEvents???
Message-ID: <1107376894.420724.260230@c13g2000cwb.googlegroups.com>

I was trying to write an asyncronous TCP server for win32 using
WSAEventSelect (which lives if win32file). Such events require
WaitForMultipleObjects (which lives if win32event) and
WSAEnumNetworkEvents WHICH IS NOT EXPOSED. This makes WSAEventSelect
useless. Does somebody know how to add the WSAEnumNetworkEvents and
WSANetwotkEvents structure win32file?
 
Maybe I'm missing something?



From ilias at lazaridis.com  Tue Feb 15 16:19:54 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 23:19:54 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cuo71l$gig$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
Message-ID: <cutp1o$hfn$3@usenet.otenet.gr>

I'm 'closing' this thread now [means that I do possibly not respond 
anymore to messages].

Thank you for your time and effort.

.

-- 
http://lazaridis.com


From as006d4848 at blueyonder.co.uk  Thu Feb 17 00:27:50 2005
From: as006d4848 at blueyonder.co.uk (Philip Smith)
Date: Thu, 17 Feb 2005 05:27:50 GMT
Subject: Derived class and deepcopy
Message-ID: <qXVQd.119843$K7.61072@fe2.news.blueyonder.co.uk>

Hi

If I derive a class (eg Matrix) from list I presume this implies the classic 
OOP 'is a' relation between the derived and super class.

I therefore presume I can use a derived class in any context that I can use 
the superclass.

In the given example I want to apply deepcopy() to the Matrix instance (on 
initialisation) to ensure that the list part is not affected by subsequent 
changes to the initialising list or Matrix but this gives me a string of 
errors (some of which imply I'm trying to copy the class rather than the 
instance).

Anyone got any thoughts on this????

Phil 




From ian at emit.demon.co.uk  Mon Feb 21 08:28:23 2005
From: ian at emit.demon.co.uk (Ian McConnell)
Date: Mon, 21 Feb 2005 13:28:23 +0000
Subject: Tiled Image viewer
Message-ID: <87vf8m11qg.fsf@emit.demon.co.uk>

Does anyone know of a widget or sample code for viewing huge (ie bigger than
RAM) images in python? The usual way of doing this is to read part of the
image into memory as a set of tiles and then zoom and pan the tiles.

The sort of thing I'm trying to achive is at

    http://iipimage.sourceforge.net/IIPDemo.html

but I'd like to be able to do something like this with python (wxpython).
The other problems are that I don't really want a client/server (just a
single executable) and I have a funny image format (100s MB of matrix data)
so making the image pyramids would be a little tricky.

I've found Matt Kimballs pan and zoom widget

    http://web.archive.org/web/20030810111006/http://matt.kimball.net/image_view.html

but this still reads the whole image into memory. Is there something similar
to image_view.py, but which also does tiling?

Thanks,
        Ian


From s.varun at gmail.com  Thu Feb 24 15:59:39 2005
From: s.varun at gmail.com (Varun)
Date: 24 Feb 2005 12:59:39 -0800
Subject: Python Online Programming Contest
Message-ID: <1109278779.955986.193860@z14g2000cwz.googlegroups.com>

Hi Friends,
Department of Information Technology, Madras Institute of Technology,
Anna University, India
is conducting a technical symposium, Samhita. As a part of samhita, an
Online Programming Contest is scheduled on Sunday, 27 Feb 2005.

This is the first Online Programming Contest in India to support
Python !!!!.
Other languages supported are C and C++.

For Registration and Rules of the contest, http://www.samhita.info/opc
For details about samhita http://www.samhita.info/

Regards,
-Online Programming Contest team



From tjprojects_usenet at yahoo.com  Tue Feb 15 22:24:09 2005
From: tjprojects_usenet at yahoo.com (tjprojects_usenet at yahoo.com)
Date: 15 Feb 2005 19:24:09 -0800
Subject: Loading functions from a file during run-time
References: <1108091598.055004.24890@g14g2000cwa.googlegroups.com>
	<f60c2138.0502151906.468fdc1b@posting.google.com>
Message-ID: <1108524249.604500.15300@o13g2000cwo.googlegroups.com>

I have to say, I was skeptical about your execution method at first --
simply joining all of the lines and then compiling them.  My
understanding of the compile method from the documentation led me to
believe that you needed to process a line at a time.  ''.join ing them
all seems to work very well, however, and it's a lot easier!

My comments about 'exec obj in globals()' still stand, however.  Give
it a try and let me know if it works the way you expect.


T.J.



From ugny-0502 at unigroup.org  Tue Feb 15 23:36:38 2005
From: ugny-0502 at unigroup.org (Unigroup of New York)
Date: Tue, 15 Feb 2005 23:36:38 -0500
Subject: LOCAL NYC - UNIGROUP 17-FEB-2005 (Thurs): ZOPE - Open Source Web 
 Development
Message-ID: <4212CDD6.ABAF0D29@unigroup.org>

 
-------------- next part --------------
Subject: LOCAL NYC - UNIGROUP 17-FEB-2005 (Thurs): ZOPE - Open Source Web Development


Unigroup's February 2005 meeting is THIS Thursday...

=====================================================================
UNIGROUP OF NEW YORK - UNIX USERS GROUP - FEBRUARY 2005 ANNOUNCEMENTS
=====================================================================

   -----------------------------------------------------
1. UNIGROUP'S FEBRUARY 2005 GENERAL MEETING ANNOUNCEMENT
   -----------------------------------------------------

      When:  THURSDAY, February 17th, 2005    (3rd Thursday)

     Where:  Alliance for Downtown NY Conference Facility
             Downtown Center
             104 Washington Street
             South West Corner of Wall Street Area
             Downtown, New York City
             ** Please RSVP (not mandatory) **

      Time:  6:15 PM - 6:25 PM  Registration
             6:25 PM - 6:45 PM  Ask the Wizard, Questions,
                                Answers and Current Events
             6:45 PM - 7:00 PM  Unigroup Business and Announcements
             7:00 PM - 9:30 PM  Main Presentation

             -----------------------------------------------
     Topic:  ZOPE - An Open Source Web Development Framework
             -----------------------------------------------

  Speakers:  Rob Page, CEO and President,
             Zope Corporation  <http://www.zope.com>


   INTRODUCTIONS:
   --------------

   Please keep an eye out for a series of _MONTHLY_ meetings which
   we have confirmed for February, March and April 2005.
   The meeting schedule is posted below (all on the 3rd Thursday).

   We are finally holding our meeting on Web Development and Zope!
   This meeting was supposed to be a followup our meeting on Python
   (March 2003), but it wound up being delayed for various reasons
   and due to various events (including things like the Solaris 10
   launch).  During this time, our friends at Zope Corporation have
   been patient, and they have been waiting for the chance to present
   Zope to Unigroup.  We do appreciate their support!

   I've called Zope a "Web Development Framework", but from what
   I've read, it may be much more than this (see below).  Major
   corporations are using Zope to build web sites and bring content
   to market.  One such example is Computer Associates... see their
   press release about CA and Zope Corp:
     http://www3.ca.com/Press/PressRelease.asp?CID=59297

   Also note that we expect to have CA present to Unigroup, later in
   the year, and they were also invited to participate in this
   week's Zope meeting.

   -------------------------------------------------------------------

   SPECIAL INSTRUCTIONS:
   ---------------------

   To REGISTER for this event, please RSVP by using the Unigroup
   Registration Page:
         http://www.unigroup.org/unigroup-rsvp.html
   This will allow us to automate the registration process.
   (Registration will also add you to our mailing list.)

   Please continue to check the Unigroup web site and meeting page,
   for any last minute updates concerning this meeting.  If you
   registered for this meeting, please check your email for any
   last minute announcements as the meeting approaches.

   Please try to RSVP as soon as possible.

   Note: RSVP is not mandatory for this location, but it does help
         us to properly plan the meeting (food, drinks, handouts,
         seating, etc.).

   -------------------------------------------------------------------

   OUTLINE OF THE MAIN PRESENTATION:
   ---------------------------------

   This month's meeting will be a presentation on ZOPE:
   - What is Zope?
   - Who uses the platform?
   - What is possible with the platform?
   - The Zope Community and Activities (e.g., Sprints)
   - Platform Futures


   The Zope Software System:
   -------------------------
   (Extracted from http://www.zope.com/Corporate/CompanyProfile.html)

   Zope is a unique software system: a high-performance application
   server, a web server, and a content management system.  It is a
   complete, self-contained solution, that includes a robust,
   scalable object database, web services architecture, and powerful
   programming capabilities.  It is designed for customization and
   extensibility.  Its components integrate tightly with a wide range
   of leading web server and database systems.  Zope promotes rapid
   creation and deployment of complex applications, totally
   manageable through a web interface.  All of this, and complete
   open source access, are provided without cost.  There are no
   licensing or runtime fees for the software.

   What Is Zope?
   -------------
   (Extracted from http://www.zope.org/WhatIsZope)

   Zope is an open source web application server primarily written in
   the Python programming language.  It features a transactional
   object database which can store not only content and custom data,
   but also dynamic HTML templates, scripts, a search engine, and
   relational database (RDBMS) connections and code.  It features a
   strong through-the-web development model, allowing you to update
   your web site from anywhere in the world. To allow for this, Zope
   also features a tightly integrated security model.  Built around
   the concept of "safe delegation of control",  Zope's security
   architecture also allows you to turn control over parts of a web
   site to other organizations or individuals.  The transactional
   model applies not only to Zope's object database, but to many
   relational database connectors as well, allowing for strong data
   integrity.  This transaction model happens automatically, ensuring
   that all data is successfully stored in connected data sources by
   the time a response is returned to a web browser or other client.

   There are numerous products (plug-in Zope components) available
   for download to extend the basic set of site building tools.
   These products include new content objects; relational database
   and other external data source connectors; advanced content
   management tools; and full applications for e-commerce, content
   and document management, or bug and issue tracking.  Zope includes
   its own HTTP, FTP, WebDAV, and XML-RPC serving capabilities, but
   can also be used with the Apache or other web servers.

   -------------------------------------------------------------------

   Web Resources:
   --------------

   Zope Corporation
     http://www.zope.com

   Zope Open Source Community
     http://www.zope.com/Services/Community.html

   Zope Community
     http://www.zope.org

   Zope Developer Community
     http://dev.zope.org

   Zope Powered Sites
     http://www.zope.org/Resources/ZopePowered

   -------------------------------------------------------------------

   Speaker Biography:
   ------------------

   (Extracted from http://www.zope.com/Corporate/Management/Page.html)

   Rob Page, Chief Executive Officer & President, Zope Corporation:

   Rob Page provides leadership and vision, directing corporate
   operations, professional services, product development and sales.
   He is involved in all aspects of company strategy, client services
   and quality assurance.  Prior to co-founding Zope Corporation in
   1995, he co-founded Connecting Minds, a consultancy firm.  He also
   served for nine years in the Marine Corps and Marine Corps Reserve
   as a data systems officer.  Rob earned his B.S. in Aerospace
   Engineering from the University of Florida.

   Company Biography:
   ------------------

   (Extracted from http://www.zope.com/Corporate/CompanyProfile.html)

   Zope Corporation uses Zope Software to create high-end custom
   solutions with unparalleled time to market.  The company
   generates revenue by offering Zope-based products, content
   management solutions through consulting services, support and
   training.  Building on the open source model, customers are freed
   of vendor dependence because they have the source code of their
   product / custom solution.

   -------------------------------------------------------------------

   Giveaways:
   ----------

   O'Reilly has been kind enough to provide us with some of their
   books, which we will continue to raffle off as giveaways at our
   meetings.

   Addison-Wesley Professional/Prentice Hall PTR has been kind
   enough to provide us with some of their books, which we will
   continue to raffle off as giveaways at our meetings.

   Unigroup would like to thank both companies for the support
   provided by their User Group programs.

   Note: The chances tend to be about 1 in 5, that any attendee of
   our meeting will walk away with a fairly valuable giveaway
   (ie. most books are valued between $30 and $60)!

   -------------------------------------------------------------------

   Fee Schedule:
       Yearly Membership (includes all meetings):      $ 50.00
       Non-Member Single Meeting:                      $ 20.00
       Student Yearly Membership:                      $ 20.00
       Non-Member Student Single Meeting (with ID):    $  5.00
       Payment Methods: Cash, Check, American Express.

   -------------------------------------------------------------------

   Complimentary Food and Refreshments will be served.  This includes
   sandwiches such as Turkey, Chicken, Tuna and Grilled Vegetables,
   as well as Assorted Salads (Cole Slaw, Potato, Tossed, Caesar,
   Pasta), Cookies/Brownies, Bottled Water and Assorted Beverages.

   -------------------------------------------------------------------

   Directions:

     Alliance for Downtown NY Conference Facility
     Downtown Center
     104 Washington Street
     Wall Street Area
     Downtown, New York City

   This building is located on the West side of the street, the
   second building north of Rector Street.  Cross Streets:
   Between Rector (South) and Carlisle (North) Streets.
   Enter the lobby, and tell the guard at the desk that you are
   heading for Unigroup.  You will be directed to the meeting room.

   Our meeting location is in the Lower West Corner of Downtown,
   North of the Battery Tunnel, South of the Downtown Hotel,
   East of West Street, and West of Greenwich Street.  Walking West
   on Rector Street from Broadway, you pass Church, Greenwich then
   Washington Streets.

   There are multiple blocks of parking lots right there, between
   Washington and Greenwich Streets, starting at the Battery Tunnel
   and extending North for a number of blocks.

   Nearest mass transit stations, in order, are the '1/9' (Rector
   Street), 'R/W' (Rector Street) and the '4/5' (Wall Street).

   -----

   Please mark this meeting on your calendar and join us!
   Please tell your friends about Unigroup!

------------------------------------------------------------------------------
------------------------------------------------------------------------------

   -----------------
2. UPCOMING MEETINGS
   -----------------

   We have a series of meetings in the works:

   - 17-FEB-2005 : Zope / Web Page Development
                   Rob Page / Zope Corporation

   - 17-MAR-2005 : Solaris 10 Part 2
                   Field Trip to Sun Microsystems

   - 21-APR-2005 : AFS and OpenAFS
                   Jeff Altman / Secure Endpoints

   - IPsec
   - Samba
   - Field Trip to HP - Invited
   - Field Trip to CA - Invited
   - Unix 35th Birthday Celebration
   - DNS
   - Unix Clusters and Clustered Databases
   - Linux Clustering Part 3: Beowulf version 2
   - Building a Firewall using FreeBSD and Linux
   - High Performance Internet Servers / Web Acceleration
   - Unix Office Tools: Word Processors, Spreadsheets, Accounting Packages.
   - PKI
   - GNU Development Environments
   - iSCSI, Serial ATA, and other new peripheral technologies

   Please let us know about any other meeting topics that you may be
   interested in.  Potential speakers on Unix related technology topics
   should contact the Unigroup board at ugny-0502 at unigroup.org.

------------------------------------------------------------------------------
------------------------------------------------------------------------------

I hope to see you all at our next meeting!

-Rob Weiner
 Unigroup Executive Director
 ugny-0502 at unigroup.org
 http://www.unigroup.org


From steve at holdenweb.com  Thu Feb  3 13:40:53 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 03 Feb 2005 13:40:53 -0500
Subject: About standard library improvement
In-Reply-To: <mailman.1831.1107455790.22381.python-list@python.org>
References: <mailman.1831.1107455790.22381.python-list@python.org>
Message-ID: <4kuMd.102708$Jk5.100022@lakeread01>

Frank Abel Cancio Bello wrote:

> Hi!
> If I make some improvement to xmlrpclib module, where I should send this 
> improvement to form part of next standard library release?
> 
> Thank
> 
> 
> 
> 
Well done!  The standard place to lodge patches (whether for bug fixes 
or improvements) is SourceForge. You'll need an account to submit 
patches or bugs, IIRC. Once you've created your account, log in and go to

   http://sourceforge.net/tracker/?group_id=5470&atid=305470

and click "Submit New".

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From cam.ac.uk at mh391.invalid  Tue Feb  8 11:28:42 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Tue, 08 Feb 2005 16:28:42 +0000
Subject: Efficient checksum calculating on lagre files
In-Reply-To: <cuap9d$172$1@gemini.csx.cam.ac.uk>
References: <5o2nd2-5hl.ln1@pluto.i.infosense.no>
	<cuap9d$172$1@gemini.csx.cam.ac.uk>
Message-ID: <cuapbv$172$2@gemini.csx.cam.ac.uk>

Michael Hoffman wrote:

> Is there a reason you can't use the sha module?

BTW, I'm using SHA-1 instead of MD5 because of the reported vulnerabilities
in MD5, which may not be important for your application, but I consider it
best to just avoid MD5 entirely in the future.
-- 
Michael Hoffman


From fredrik at pythonware.com  Tue Feb  8 16:59:26 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 22:59:26 +0100
Subject: Loop in list.
References: <1107874174.445345.41230@c13g2000cwb.googlegroups.com><opslwwd7g71js0xs@news.telkomsa.net>
	<3e8ca5c805020813074e975a4d@mail.gmail.com>
Message-ID: <cubckl$l10$1@sea.gmane.org>

Stephen Thorne wrote:

>> '>>> a = [i*2*b for i in range(3) for b in range(4)]
>> '>>> a
>> [0, 0, 0, 0, 0, 2, 4, 6, 0, 4, 8, 12]
>>
>> Might take you a while to correlate the answer with the loop, but you
>> should be able to see after a while that this nesting is the same as
>>
>> '>>> a = []
>> '>>> for b in range(4):
>> '>>>     for i in range(3):
>> '>>>         a.append(i*2*b)
>
> There is a subtle error in this explanation.

if you run the example, you'll notice that it's not so subtle.  read on.

> The equivilence actually looks like:
>
> '> a = []
> '> l1 = range(4)
> '> l2 = range(3)
> '> for b in l1:
> '>     for i in l2:
> '>         a.append(i*2*b)

really?

    def myrange(x):
      print "RANGE", x
      return range(x)

    print [i*2*b for i in myrange(3) for b in myrange(4)]

    a = []
    for b in myrange(4):
      for i in myrange(3):
        a.append(i*2*b)
    print a

    a = []
    l1 = myrange(4)
    l2 = myrange(3)
    for b in l1:
      for i in l2:
        a.append(i*2*b)
    print a

prints

    RANGE 3
    RANGE 4
    RANGE 4
    RANGE 4
    [0, 0, 0, 0, 0, 2, 4, 6, 0, 4, 8, 12]
    RANGE 4
    RANGE 3
    RANGE 3
    RANGE 3
    RANGE 3
    [0, 0, 0, 0, 2, 4, 0, 4, 8, 0, 6, 12]
    RANGE 4
    RANGE 3
    [0, 0, 0, 0, 2, 4, 0, 4, 8, 0, 6, 12]

(to translate a list comprehension to nested statements, remove
the result expression, insert colons and newlines between the for/if
statement parts, and put the append(result expression) part inside
the innermost statement)

</F> 





From python-url at phaseit.net  Wed Feb  9 05:22:55 2005
From: python-url at phaseit.net (Craig Ringer)
Date: Wed, 09 Feb 2005 10:22:55 +0000
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Feb  9)
Message-ID: <mailman.2250.1107962711.22381.python-announce-list@python.org>

QOTW:  "Such infrastructure building is in fact fun and instructive -- as
long as you don't fall into the trap of *using* such complications in
production code, where Python's simplicity rules;-)." -- Alex Martelli
    http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/41a6c0e1e260cd72/

"C++ to Python is a steep 'unlearning' curve..." -- Philip Smith

"URK -- _my_ feeling is that we have entirely *too many* options for
stuff like web application frameworks, GUI toolkits, XML processing,
..." -- Alex Martelli
    http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/a9bdc98acb5acae4/

"We should concentrate on *real* problems, ones that exist in real code,
not ones that mostly exist in wild-eyed prose that consists of
predictions of pain and death that conspicuously fail to occur, no matter
how many times they are  repeated or we are exhorted to heed them or face
our doom." -- Jeremy Bowers
    http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/a75da70b0845b6fe/


Special thanks this week to Dean Goodmanson for his help identifying
several items.

    The Online Computer Library Center contest is open.  It
    closes May 15.  Among the usual C++ and Java languages, Python
    also is available for selection:
        http://www.oclc.org/research/researchworks/contest/default.htm#guidelines       

    Baoqui Chi runs into a documented, but easily overlooked, trap
    in the handling of __del__ methods and receives good advice on
    better fixes:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/13ec343eb0a37247/

    Steve Holden explains how to think about bytecode management:
       http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/59c0466111b075b8/
    in a conversation aimed at Pyro improvement.

    Michael Tobis sparks off a discussion on the underlying nature
    of generators and offers a caution on jumping to conclusions
    about the writings of non-native English speakers:
        http://mail.python.org/pipermail/python-list/2005-January/263448.html

    Derek finds out that the Python interpereter is smarter about
    finding resources than it lets on:
        http://mail.python.org/pipermail/python-list/2005-January/263473.html

    irc.freenode.net #python is overcrowded: the entrance now
    routes to #python-cleese or #python-gilliam:
        http://divmod.org/users/washort/python-split.htmlmklm

    Steve Holden provides an evocative illustration that the rules
    are there for a reason, even if breaking them doesn't hit you
    (*ahem*) immediately:
        http://mail.python.org/pipermail/python-list/2005-February/263851.html

    In response to a question about rewriting exceptions to include
    more information, Stefan Behnel gets a couple of rather useful
    answers:
        http://mail.python.org/pipermail/python-list/2005-February/263843.html

    Netcraft Reports 33K Zope servers in January, 55K in February!
        http://mail.zope.org/pipermail/zope-announce/2005-February/001651.html

    Joakim Stork discovers that thanks to classes being first class
    objects in Python, sometimes the best solution is so simple it's
    often possible to miss it entirely:
        http://mail.python.org/pipermail/python-list/2005-February/263891.html

    Someone posts an interesting attempt at a cross-platform way to
    discover the user's home directory:
        http://mail.python.org/pipermail/python-list/2005-February/263921.html

    Metaclasses are handy things. Steven Bethard demonstrates a nice
    simple use case:
        http://mail.python.org/pipermail/python-list/2005-February/264037.html

    As John Machin demonstrates, generating SQL in Python doesn't
    have to be ugly:
        http://mail.python.org/pipermail/python-list/2005-February/264248.html

========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Brett Cannon continues the marvelous tradition established by 
    Andrew Kuchling and Michael Hudson of intelligently summarizing
    action on the python-dev mailing list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    The Python Business Forum "further[s] the interests of companies
    that base their business on ... Python."
	http://www.python-in-business.org

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    deli.cio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topics/pythonurl/         
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.




From steven.bethard at gmail.com  Sun Feb  6 14:44:01 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 06 Feb 2005 12:44:01 -0700
Subject: Multiple constructors
In-Reply-To: <1grk3du.3zpb0h62fjd1N%aleaxit@yahoo.com>
References: <6SjNd.38337$K7.21639@fe2.news.blueyonder.co.uk>
	<1grk3du.3zpb0h62fjd1N%aleaxit@yahoo.com>
Message-ID: <cKWdnW73Z-3h7pvfRVn-jA@comcast.com>

Alex Martelli wrote:
> If you want to do this
> all the time, you could even build appropriate infrastructure for this
> task -- a little custom descriptor and metaclass, and/or decorators.
> Such infrastructure building is in fact fun and instructive -- as long
> as you don't fall into the trap of *using* such complications in
> production code, where Python's simplicity rules;-).

+1 QOTW.

I think this is one of the "great truths" of Python.  Descriptors, 
metaclasses, decorators, etc. are all there to let you do interesting, 
useful things.  But if you're using such constructs for more than a few 
special cases, then you're missing out on a simple solution that Python, 
almost certainly, makes beautiful.

Steve


From ug at algonet.se  Wed Feb 23 11:11:13 2005
From: ug at algonet.se (=?ISO-8859-1?Q?Ulf_G=F6ransson?=)
Date: Wed, 23 Feb 2005 17:11:13 +0100
Subject: Fonts and PIL
In-Reply-To: <mailman.2966.1109166017.22381.python-list@python.org>
References: <mailman.2966.1109166017.22381.python-list@python.org>
Message-ID: <cvia29$ct4$1@yggdrasil.glocalnet.net>

Greg Lindstrom wrote:
> I'm running Python 2.3 on a windows box and would like to use PIL to 
> superimpose text over an existing pgn image.  I have no problem getting 
> the text on the image but can not figure out how to manage fonts.  How 
> to set the font style and size.  From reading the archives I surmise 
> that I want to work with *.pil files.  I've searched my box for the font 
> files but did not find them.  I've googled for information on pil font 
> files and it appears to be involved with Zope.  So, can any of you 
> honcho-level types help me out?  How can I set font size and style in my 
> PIL application?

Pick a nice .ttf file and load it with ImageFont.truetype().

/ug


From tim.golden at viacom-outdoor.co.uk  Mon Feb 14 03:21:22 2005
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Mon, 14 Feb 2005 08:21:22 -0000
Subject: connecting to Sybase/MsSQL from python
Message-ID: <9A28C052FF32734DACB0A288A3533991035AE0@vogbs009.gb.vo.local>

[Ed Leafe]
| 	Has anyone ever used this product: 
| http://www.object-craft.com.au/projects/mssql/
| 
| 	Any feedback, positive or negative?

I have, pretty much constantly, for the last three
years with no significant issues at all. I use it
on Win32 boxes, although I have had it running under
Linux -- don't remember how I got it to compile,
unfortunately.

Only slight issuettes are: it doesn't handle all the
datatypes (eg IMAGE and some others I don't remember);
as advertised, the callproc doesn't work on win32, but
it's easy enough for most purposes to do a

cursor.execute ("EXECUTE pr_...")

although you won't get a return code that way.

All in all, I'm a very happy customer. From time
to time I've dabbled with other ways of accessing
MSSQL - ADO, PyMSSQL, etc. but none has offered me
anything I couldn't get from the Object Craft module.

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________


From exogen at gmail.com  Thu Feb 17 11:24:23 2005
From: exogen at gmail.com (Brian Beck)
Date: Thu, 17 Feb 2005 11:24:23 -0500
Subject: Getting milliseconds in Python
In-Reply-To: <87d5uzyx39.fsf@gmail.com>
References: <1108565135.167562.196830@z14g2000cwz.googlegroups.com>
	<37h5epF5ck38lU2@individual.net>
	<1108571009.698970.152020@z14g2000cwz.googlegroups.com>
	<cv0100$715$1@eeyore.INS.cwru.edu>
	<mailman.2706.1108577006.22381.python-list@python.org>
	<cv0gru$802$1@eeyore.INS.cwru.edu>
	<slrnd19d00.1ep.curty@einstein.electron.net>
	<cv2dkb$97g$1@eeyore.INS.cwru.edu> <87d5uzyx39.fsf@gmail.com>
Message-ID: <cv2gl7$ea5$1@eeyore.INS.cwru.edu>

Martin Christensen wrote:
> A math teacher! A math teacher! My kingdom for a math teacher!
> 
> Martin

Man, this is the hottest topic on c.l.py since that Lazaridis guy...

--
Brian Beck
Adventurer of the First Order


From francis.girard at free.fr  Tue Feb  1 15:47:07 2005
From: francis.girard at free.fr (Francis Girard)
Date: Tue, 1 Feb 2005 21:47:07 +0100
Subject: Next step after pychecker [StarKiller?]
In-Reply-To: <pan.2005.02.01.10.21.23.762637@nospam.logilab.fr>
References: <41ff0308$0$6503$636a15ce@news.free.fr>
	<pan.2005.02.01.10.21.23.762637@nospam.logilab.fr>
Message-ID: <200502012147.07153.francis.girard@free.fr>

Hi,

Do you have some more pointers to the StarKiller project ? According to the 
paper some implementation of this very interesting project exists.

Thank you

Francis Girard

Le mardi 1 F?vrier 2005 11:21, Sylvain Thenault a ?crit?:
> On Tue, 01 Feb 2005 05:18:12 +0100, Philippe Fremy wrote:
> > 	Hi,
>
> Hi
>
> > I would like to develop a tool that goes one step further than pychecker
> > to ensure python program validity. The idea would be to get close to what
> > people get on ocaml: a static verification of all types of the program,
> > without any kind of variable declaration. This would definitely brings a
> > lot of power to python.
> >
> > The idea is to analyse the whole program, identify constraints on
> > function arguments and check that these constraints are verified by other
> > parts of the program.
>
> Did you take a look at the starkiller [1] and pypy projects [2] ?
>
> > What is in your opinion the best tool to achieve this ? I had an
> > extensive look at pychecker, and it could certainly be extended to do
> > the job. Things that still concern me are that it works on the bytecode,
> > which prevents it from working with jython and the new .NET python.
> >
> > I am currently reading the documentation on AST and visitor, but I am
> > not sure that this will be the best tool either. The AST seems quite
> > deep and I am afraid that it will make the analysis quite slow and
> > complicated.
>
> are you talking about the ast returned by the "parser" module, or the ast
> from the "compiler" module ? The former is a higher abstraction, using
> specific class instances in the tree, and most importantly with all the
> parsing junk removed. See [3]. You may also be interested in pylint
> [4] which is a pychecker like program built in top of the compiler ast,
> and so doesn't require actual import of the analyzed code. However it's
> not yet as advanced as pychecker regarding bug detection.
>
> And finally as another poster said you should probably keep an eye open
> on the python 2.5 ast branch work...
>
> Hope that helps !
>
> [1]http://www.python.org/pycon/dc2004/papers/1/paper.pdf)
> [2]http://codespeak.net/pypy/index.cgi?home
> [3]http://www.python.org/doc/current/lib/module-compiler.ast.html
> [4]http://www.logilab.org/projects/pylint
>
> --
> Sylvain Th?nault                               LOGILAB, Paris (France).
>
> http://www.logilab.com   http://www.logilab.fr  http://www.logilab.org



From eliediamonds at gmail.com  Fri Feb 11 12:51:54 2005
From: eliediamonds at gmail.com (eliediamonds at gmail.com)
Date: 11 Feb 2005 09:51:54 -0800
Subject: Partnership Opportunity
Message-ID: <1108144314.761060.34690@g14g2000cwa.googlegroups.com>

Partnership Opportunity
Hello,
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those interested in forming a partnership to sell jewelry on eBay or
anywhere else.  I work for Elie International, a manufacturer of fine
jewelry located in the heart of the diamond district in New York City.
We have been in the jewelry business for over 23 years and are
registered with the Jewelers Board of Trade (JBT registration #
01222207) and Dunne & Bradstreet.
For the first time in our company's history we are looking to build
partnerships with individual sellers. We hold an extensive stock of
over 24,000 items and need vendors to keep it moving.  By selling our
merchandise on eBay, or to family and friends, we become your partner
not your competitor and offer you fine jewelry at wholesale prices
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is a partnership and we offer our partners the full support that they
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get them started. Please contact us via e-mail at elieint at aol.com or at
(212) 719-0090 if you are interested or have any questions and please
include where you saw this message.  Thank You



From dbickett at gmail.com  Thu Feb  3 22:52:22 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Thu, 3 Feb 2005 22:52:22 -0500
Subject: Possible additions to the standard library? (WAS: About standard
	library improvement)
In-Reply-To: <WorldClient-F200502031432.AA32333857@tesla.cujae.edu.cu>
References: <WorldClient-F200502031432.AA32333857@tesla.cujae.edu.cu>
Message-ID: <1d6cdae3050203195251843db2@mail.gmail.com>

I was reading the thread by Frank Bello[1] about his offered addition
to the xmlrpclib module, and it reminded me of a few methods I had
made in the past that I considered worthy of being a part of the
standard library.

Rather than reiterate his question of how one gets one's patch into
the standard library -- as I can simply read the answers from his
thread -- I am posting here asking the opinion of the Python community
as to whether *you* consider these worthy of standard library
implementation.

The first one is a function I made for the _winreg module[2]. The
commentary, I think, explains what it does and why it had to be
written very clearly, so I'll just copy and paste it:[3]

|def DeleteKeyAll( key , subKey ):
|    """
|    Since DeleteKey() can't remove keys that contain subkeys, this serves
|    to iterate through a key and delete every single subkey, and then the
|    key itself.
|
|    Note: This function assumes that _winreg has been imported using:
|            from _winreg import *
|          It can be easily converted by simply prepending all of the
|          applicable statements with `_winreg.' if you have imported
|          it otherwise.
|    """
|    # try to open the specified key
|    try:
|        handle = OpenKey( key , subKey )
|    except EnvironmentError:
|        return False
|    # now, iterate through the subkeys and remove
|    # each of them (recursively)
|    while True:
|        nextKey = QueryInfoKey( handle )[0]
|        if not nextKey:
|            # if there aren't any more subkeys, delete the key at hand
|            try:
|                DeleteKey( key , subKey )
|                return True
|            except EnvironmentError:
|                break
|        else:
|            # otherwise, recursively delete the subkeys
|            DeleteKeyAll( key , subKey + "\\" + EnumKey( handle , 0 ) )

These next two are methods that I've applied to my own version of the
string object from time to time:

|class newstring( str ):
|    def setreplace( self , set ):
|        """
|        Do multiple replaces at once, using dictionary `set' as a legend,
|        where each instance of each key is to be replaced with that key's
|        value.
|        """
|        if type( set ) == dict:
|            result = self.__str__()
|            for key, value in set.iteritems():
|                if type( key ) == str and type( key ) == str:
|                    result = result.replace( key , value )
|                else:
|                    raise TypeError, "All items of parameter set must
be strings"
|            return result
|        else:
|            raise TypeError, "Parameter set must be a dictionary"
|
|    def reverse( self ):
|        """
|        Return a reversed copy of string.
|        """
|        string = [ x for x in self.__str__() ]
|        string.reverse()
|        return ''.join( string )

In action:

>>> string = newstring("foo bar")
>>> string.reverse()
'rab oof'
>>> string.setreplace( { 'f' : 'b' , 'a' : 'o' } )
'boo bor'

I actually went on to write a method that reversed an integer
(inspired by an SAT question -- I had time to kill) using the
newstring's reverse() method, but it's hard enough justifying having a
string reverse method (though not impossible,) let alone an integer
reverse method, so I left that one on my hard drive :)

One more thing worth noting is that I'm not educated in the ways of
standard library etiquette, so I was more or less going out on the
limb doing type-checking in setreplace(). For all I know that's some
sort of paradox and you're supposed to let the user feel the pain, but
I did what I felt was right at the time.

This is basically all about commentary and criticism, and your opinion
of whether or not these deserve to be added to the library (or rather,
added as a patch, I presume). Thank you all for your time :)

P.S.:
I have included all of the methods in this post for the sake of
accessibility, and i have preceded all of the code with `|' because I
am unaware of the status of google's whitespace problem. If you want
to more easily copy and paste this code, I have posted it on nopaste:

DeleteKeyAll:        http://rafb.net/paste/results/Yh6x0598.html
newstring methods:   http://rafb.net/paste/results/O51kja41.html

NOTES:
[1] http://tinyurl.com/4dkgw
[2] I'm currently unaware if _winreg is a c extension module or pure
python, but I'm assuming it's C, so I don't know how possible it is to
add pure python to it...
[3] I made a few quick edits after I pasted it in, so please bring to
my attention any errors or inconsistencies you see

-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From km at mrna.tn.nic.in  Sun Feb  6 12:39:29 2005
From: km at mrna.tn.nic.in (km)
Date: Sun, 6 Feb 2005 23:09:29 +0530
Subject: IPython colors in windows
In-Reply-To: <1107530489.308497.103530@g14g2000cwa.googlegroups.com>
References: <36hculF51ho2sU1@individual.net>
	<1107530489.308497.103530@g14g2000cwa.googlegroups.com>
Message-ID: <20050206173929.GA3319@mrna.tn.nic.in>

Hi all,

Have u tried Colors0.1 module from python.org ? 

KM
--------------------------------------------------------------------
On Fri, Feb 04, 2005 at 07:21:29AM -0800, Fuzzyman wrote:
> Are you really using the readline module from newcenturycomputers ?
> I've got a feeling that's broken and you need to use the Gary Bishop
> one with IPython....
> 
> Sorry if this is spurious... (restricted internet access, so I can't
> check for you... but the correct one is linked to from the IPython
> site).
> 
> Regards,
> 
> Fuzzy
> http://www.voidspace.org.uk/python/index.shtml
> 
> Claudio Grondi wrote:
> > Hi,
> >
> > I have watched this thread hoping to get an
> > hint on my problem, but it seems I didn't.
> >
> > My problem is, that the background of part of
> > the error messages is always black
> > (e.g. after typing In [1]: sdfsdf)
> > and my monitor failes to show the red, green
> > texts on black background clearly enough
> > to see it (I can read it after selection, which
> > inverts the colors).
> > I have tried to play with PyColorize.py,
> > LightBGColors = ColorScheme(
> >     'LightBG',{
> >     token.NUMBER     : Colors.Cyan,
> >     token.OP         : Colors.Blue,
> >     token.STRING     : Colors.Blue,
> >     tokenize.COMMENT : Colors.Red,
> >     token.NAME       : Colors.White, # Colors.Black,
> >     token.ERRORTOKEN : Colors.Red,
> >
> >     _KEYWORD         : Colors.Green,
> >     _TEXT            : Colors.Blue,
> >
> >     'normal'         : Colors.White # Colors.Normal  # color off
> (usu.
> > Colors.Normal)
> >     }
> > but without success.
> > How can I get rid of the black background
> >
> "---------------------------------------------------------------------------
> > "
> > "exceptions.NameError"                                 Traceback
> (most
> > recent call last)
> > in with quotation marks marked areas?
> > Where is the color of the background of this
> > areas defined?
> > The color scheme seems to handle only the
> > text colors, not the background.
> >
> > Claudio
> >
> > "Ashot" <ashot at removemolsoftthis.com> schrieb im Newsbeitrag
> > news:opsln54fpwej1m1c at ashot...
> > > yea, I've done that. It must be something subtle, as the colors and
> tab
> > > completion works.
> > > On Thu, 03 Feb 2005 20:31:37 -0800, DogWalker
> <forestiero at qwest.net>
> > wrote:
> > >
> > > > "Ashot" <ashot at removemolsoftthis.com> said:
> > > >
> > > >> On 3 Feb 2005 19:18:33 -0800, James <fphsml at gmail.com> wrote:
> > > >>
> > > >>>
> > > >>> Ashot wrote:
> > > >>>> I am using IPython in windows and the LightBG setting doesn't
> > > >>> correctly
> > > >>>> because the background of the text is black even if the
> console
> > > >>> background
> > > >>>> is white.  Anyone know whats going on?  Thanks.
> > > >>>>
> > > >>>> --
> > > >>>> ==============================
> > > >>>> Ashot Petrosian
> > > >>>> University of Texas at Austin, Computer Sciences
> > > >>>> (views expressed are solely my own)
> > > >>>> ==============================
> > > >>>
> > > >>> Did you try installing readline for windows?
> > > >>> http://newcenturycomputers.net/projects/readline.html
> > > >>>
> > > >>
> > > >> yea I've installed that and ctypes.  The color and tab
> completion work,
> > > >> its just that colored get displayed with black background, it
> almost
> > > >> works
> > > >> so its very frustrating..
> > > >>
> > > >
> > > > Did you try the following (from the manual)?:
> > > >
> > > > Input/Output prompts and exception tracebacks
> > > >
> > > >
> > > > You can test whether the colored prompts and tracebacks work on
> your
> > > > system interactively by typing '%colors Linux' at the prompt (use
> > > > '%colors LightBG' if your terminal has a light background). If
> the input
> > > > prompt shows garbage like:
> > > > [0;32mIn [[1;32m1[0;32m]: [0;00m
> > > >  instead of (in color) something like:
> > > >  In [1]:
> > > >   this means that your terminal doesn't properly handle color
> escape
> > > > sequences. You can go to a 'no color' mode by typing '%colors
> NoColor'.
> > > >
> > > >
> > > >   You can try using a different terminal emulator program. To
> > > > permanently set your color preferences, edit the file
> > > > $HOME/.ipython/ipythonrc and set the colors option to the desired
> value.
> > >
> > >
> > >
> > > --
> > > ==============================
> > > Ashot Petrosian
> > > University of Texas at Austin, Computer Sciences
> > > (views expressed are solely my own)
> > > ==============================
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list

-- 



From trial at ugyvitelszolgaltato.hu  Fri Feb 25 08:33:55 2005
From: trial at ugyvitelszolgaltato.hu (Attila Szabo)
Date: Fri, 25 Feb 2005 14:33:55 +0100
Subject: strange SyntaxError
Message-ID: <20050225133355.GI20239@csola.ugyvitelszolgaltato.hu>

Hi,

I wrote this sample piece of code:
                                                  
def main():
        lambda x: 'ABC%s' % str(x)
        for k in range(2): exec('print %s' % k)

main()

With the lambda line, I get this:
SyntaxError: unqualified exec is not allowed in function 'main'
it contains a nested function with free variables
Without the lambda, it's ok...
     
What's this ?

thanks

-- 

A t t i l a :: trial at ugyvitelszolgaltato.hu :: S z a b o



From steve at holdenweb.com  Thu Feb  3 17:17:51 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 03 Feb 2005 17:17:51 -0500
Subject: List mapping question
In-Reply-To: <g-mdnXrKqZd2Ap_fRVn-rw@midcoast.com>
References: <g-mdnXrKqZd2Ap_fRVn-rw@midcoast.com>
Message-ID: <vvxMd.102714$Jk5.11242@lakeread01>

Marc Huffnagle wrote:

> I have a number of variables that I want to modify (a bunch of strings 
> that I need to convert into ints).  Is there an easy way to do that 
> other than saying:
> 
>  > a = int(a)
>  > b = int(b)
>  > c = int(c)
> 
> I tried
> 
>  > [i = int(i) for i in [a, b, c]]
> 
> but that didn't work because it was creating a list with the values of 
> a, b and c instead of the actual variables themselves, then trying to 
> set a string equal to an integer, which it really didn't like.
> 
>      Marc
  >>> a,b,c = 1.1, 2.2, 3.3
  >>> a,b,c = map(int, (a,b,c))
  >>> a,b,c
(1, 2, 3)
  >>> a,b,c = [int(x) for x in (a,b,c)]
  >>> a,b,c
(1, 2, 3)

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From erikbethke at gmail.com  Wed Feb  9 09:21:54 2005
From: erikbethke at gmail.com (Erik  Bethke)
Date: 9 Feb 2005 06:21:54 -0800
Subject: Trouble with the encoding of os.getcwd() in Korean Windows
In-Reply-To: <1107956992.350460.12720@f14g2000cwb.googlegroups.com>
References: <1107953764.478501.176650@c13g2000cwb.googlegroups.com>
	<cud2nj$det$1@news6.zwoll1.ov.home.nl>
	<1107956992.350460.12720@f14g2000cwb.googlegroups.com>
Message-ID: <1107958914.583017.79190@l41g2000cwc.googlegroups.com>

Hello All,

sorry for all the posts... I am *almost* there now...

okay I have this code:

import sys, os

      encoding = locale.getpreferredencoding()
      htmlpath = os.getcwd()
      htmlpath = htmlpath.decode( encoding )

  ..... write to the file .....
..... file is written fine, and can be opened by both FireFox and IE
and displays fine ...

      webbrowser.open( htmlpath.encode ( encoding ), True, True )

      the line above now works fine (fixed the ascii error)

     but *NOW* my problem is that FirefOX pops up a message box
complaining that the file does not exist, but it certainly does, it
just doesn't like what it is called...

Any ideas now?

Thanks,
-Erik



From littlejohn.75 at news.free.fr  Tue Feb  1 07:08:15 2005
From: littlejohn.75 at news.free.fr (F. Petitjean)
Date: 01 Feb 2005 12:08:15 GMT
Subject: Python's idiom for function overloads
References: <mailman.1677.1107230965.22381.python-list@python.org>
	<41ff066c$0$6473$636a15ce@news.free.fr>
	<tyfoef4mw2u.fsf@pcepsft001.cern.ch>
	<41ff63bb$0$21348$636a15ce@news.free.fr>
Message-ID: <41ff712f$0$19558$636a15ce@news.free.fr>

Le Tue, 01 Feb 2005 12:10:47 +0100, Philippe Fremy a ?crit :
> 
>> Frequently, in Python, code which checks for types, rather than
>> checking for features, ends up being excessively restrictive and
>> insufficiently general.
> 
snip
> 
> Enforcing types also brings the benefit that the program is more 
> deterministic. In my experience, there is a lot more benefits to have an 
> object whose type is clearly identified than to have function that 
> accepts generic objects.
If you insist to always have only clearly identified types of variables
you will use the Hungarian notation :
bool bIsDir = blah
const char *lpszMessage = "It's a directory";
> 
> I would go as far as saying that variables should have immutable types. 
> It is more restricting that what python provides currently, but leads to 
> clearer programming practice: the intent of the developer shows up in 
> the type he uses.
clearer programming practice which goes with unreadable code ?
> 
> 
> While Python's dynamic typing liberty is enjoyable, I think it harms 
> when you start to work on big projects. It prevents you to put many 
> safety assumptions which might bite you back.
Python is strongly typed (at run-time). You can get a traceback sure but
it is rather difficult to get unreliable results.
> 
> 	regards,
> 
> 	Philippe


From me at privacy.net  Mon Feb 28 22:18:43 2005
From: me at privacy.net (Dan Sommers)
Date: 28 Feb 2005 22:18:43 -0500
Subject: accessor/mutator functions
References: <pan.2005.02.28.23.08.23.223910@dalkescientific.com>
	<m2mztokzxo.fsf@unique.fully.qualified.domain.name.yeah.right>
	<pan.2005.03.01.02.27.22.202606@dalkescientific.com>
Message-ID: <m2zmxo5a0c.fsf@unique.fully.qualified.domain.name.yeah.right>

On Tue, 01 Mar 2005 02:27:03 GMT,
Andrew Dalke <dalke at dalkescientific.com> wrote:

> Me:
>>> What's wrong with the use of attributes in this case and how
>>> would you write your interface?

> Dan Sommers:
>> I think I'd add a change_temperature_to method that accepts the target
>> temperature and some sort of timing information, depending on how the
>> rest of the program and/or thread is structured.

> Hmmm.  I wonder if this is mostly a question of how the process
> decomposition occurs.  I think in objects ("thingys with state")
> whereas you think in tasks ("thingys that do stuff")?  I say that
> somewhat surprisingly in that I'm not a deep OO person - functions are
> fine with me and I don't like the Java/Ruby "everything is in a class"
> world view.

I'm not an OO guy, either.  Somewhere back in the mid 90's, I was
dragged, kicking and screaming, into OO from the world of Structured
Programming.

You're right about my notion of an object:  I think that if all you have
is state information, then you just have a C struct and there's no point
in doing OO.  I still write plenty of (smallish) programs like that.

>> It might turn into two or three methods, depending on whether I can
>> afford to block while waiting, or what kind of intermediate feedback
>> and/or error handling I want (or one method with some carefully
>> chosen default arguments).

> In the case I'm hypothesizing (haven't worked with a temperature
> controller in about 15 years) it's hard to put a layer above
> everything because there could be so many different protocols
> (chemical protocols, not I/O ones) with different rates.  Eg, it could
> be an exponential decay, or step-wise approximation thereof.

Yes, it would be difficult (and silly and a maintentance nightmare,
too!) to put every protocol into the temerature controller.  I think at
that point, I'd put the protocols in a separate "layer," and I'd have to
think carefully about that layer's interface to the temperature
controller.  My application would be that much farther from even having
to know the current temperature, let alone access it directly from the
TemperatureController object (although at some point, the application
would probably end up displaying that current temperature, so it's not
like everything is completely isolated from everything else).

>> I don't know how that device driver works, but it might look something
>> like this:
>> 
>> def change_temperature_to( self, target, seconds_between_checks ):
>> print 'target temperature:', target
>> tell_the_device_to_change( )
>> while 1:
>> current = read_the_temperature_from_the_device( )
>> print 'current temperature:', current
>> if abs( current - target ) < 0.1:
>> break
>> time.sleep( seconds_between_checks )

> Your "tell_the_device_to_change" is my "self.target" and your
> "read_the_temperature_from_the_device" is "self.current_temperature".
> In some sense it comes down to style.

My point was mostly that change_temerature_to would be a method of a
TemperatureController object.  "tell_the_device_to_change" is whatever
method/function you have behind setting self.target.  As you noted, I
think of the temperature controller as being able to manage its own
temperature rather than be a (thin) wrapper around a device driver.

> BTW, had I done this for real I would have two layers, one which is
> communications oriented ("send 'get current temperature' message to
> device") and my object model which uses the messaging interface
> underneath.

That sounds about right.

> I liked being able to say:

> print atom.symbol, "with charge", atom.charge, "has", \
>       len(atom.bonds), "bonds"

> for i, bond in enumerate(bonds):
>   print "bond", i, "has type", bond.bondtype

> To me this is a very natural way of querying the data and
> traversing the data structure.

> Now underneath the covers it looks like this:

>   atom.charge fails so use __getattr__(atom, "charge")
>   __getattr__ uses a dispatch table to get the underlying C function
>       which is "dt_getcharge"
>   return dt_getcharge(self.handle)

> where "handle" is the handle used by the C library.

> I figured though that this example might be more esoteric
> than my PID controller example, though in retrospect it
> looks like it might be a better justification.

I like that kind of abstraction:  the atom object hides the fact that
the charge comes out of another layer/library/object entirely.

Regards,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>
?? ? ?? ? c? = 1


From enrio at online.no  Mon Feb 28 19:53:16 2005
From: enrio at online.no (enrio at online.no)
Date: 28 Feb 2005 16:53:16 -0800
Subject: zlib.decompress cannot, gunzip can
Message-ID: <1109638396.839493.50070@l41g2000cwc.googlegroups.com>

I have a string which I try to decompress:

  body = zlib.decompress(body)

but I get

  zlib.error: Error -3 while decompressing data: incorrect header check

However, I can write the string to a file and run gunzip with the
expected results:

  f = open('/tmp/bd.gz', 'w')
  f.write(body)
  f.close
...
  $ gunzip bd.gz
  $ less bd

What should I do to decompress it in Python?

Regards, Enrique



From nhodgson at bigpond.net.au  Tue Feb 15 05:20:32 2005
From: nhodgson at bigpond.net.au (Neil Hodgson)
Date: Tue, 15 Feb 2005 10:20:32 GMT
Subject: os.rename() doesn't work w/unicode??
References: <UtfQd.58964$L_3.26017@clgrps13> <cus335$2p0$1@news.comcor-tv.ru>
	<EMjQd.43504$K54.24414@edtnps84>
Message-ID: <Q1kQd.162111$K7.88988@news-server.bigpond.net.au>

fanbanlo:

> The filename is supposed to be in Chinese, on NTFS (WinXP).  However,
> when i print it, they are all '???', and that caused os.rename() to break.
>
> How to force os.walk to return a list of unicode filename?

   The convention in the unicode file name support is that calls with
unicode arguments return unicode results:

>>> h = "e:\\unicode"
>>> import os
>>> for p,d,f in os.walk(h):
...     print p, "!", d, "!", f
...
e:\unicode ! [] ! ['ko.py', 'abc', 'ascii', 'Gr\xfc\xdf-Gott', 'uni.py',
'Ge??-sa?', '????????????', '??????', '???', '????G\xdf', '???',
'unilin.py']
>>> for p,d,f in os.walk(unicode(h, "latin1")):
...     print p, "!", d, "!", f
...
e:\unicode ! [] ! [u'ko.py', u'abc', u'ascii', u'Gr\xfc\xdf-Gott',
u'uni.py', u'\u0393\u03b5\u03b9\u03ac-\u03c3\u03b1\u03c2',
u'\u0417\u0434\u0440\u0430\u0432\u0441\u0442\u0432\u0443\u0439\u0442\u0435',
u'\u05d4\u05e9\u05e7\u05e6\u05e5\u05e1', u'\u306b\u307d\u3093',
u'\u66e8\u05e9\u3093\u0434\u0393\xdf', u'\u66e8\u66e9\u66eb', u'unilin.py']

   Neil




From steven.bethard at gmail.com  Thu Feb  3 16:10:08 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 03 Feb 2005 14:10:08 -0700
Subject: Basic file operation questions
In-Reply-To: <opslnm1cge1js0xs@news.telkomsa.net>
References: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
	<opsllt9r191js0xs@news.telkomsa.net>
	<mailman.1808.1107431422.22381.python-list@python.org>
	<ctt53b$l5u$00$1@news.t-online.com>
	<opslnm1cge1js0xs@news.telkomsa.net>
Message-ID: <J4Cdnc6GnLGyDp_fRVn-3w@comcast.com>

Caleb Hattingh wrote:
> Peter
> 
>> Yes, you can even write
>>
>> f = open("data.txt")
>> for line in f:
>>     # do stuff with line
>> f.close()
>>
>> This has the additional benefit of not slurping in the entire file at  
>> once.
> 
> Is there disk access on every iteration?   I'm guessing yes?  It 
> shouldn't  be an issue in the vast majority of cases, but I'm naturally 
> curious :)

Short answer:
No, it's buffered.

Long answer:
This buffer is actually what causes the problems in interactions between 
uses of the next method and readline, seek, etc:

py> f = file('temp.txt')
py> for line in f:
... 	print line,
... 	break
...
line 1
py> f.read()
''
py> for line in f:
... 	print line,
...
line 2
line 3

Using the iteration protocol (specificaly, when file.next is called) 
causes the file object to read part of the file into a buffer for the 
iterator.  The read method doesn't access the same buffer, and sees that 
  (because the file is so small) we've already seeked to the end of the 
file, so it returns '' to signal that the entire file has been read, 
even though we have not finished iterating.  The iterator however, which 
has access to the buffer, can still complete its iteration.

The moral of the story is that, in general, you should only use the file 
as an iterator after you are done calling read, readline, etc. unless 
you want to keep track of the file position and do an appropriate 
file.seek() call after each use of the iterator.

Steve


From ilias at lazaridis.com  Sat Feb 19 13:59:31 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sat, 19 Feb 2005 20:59:31 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cv7vte$t1g$01$1@news.t-online.com>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr> <cv7k8e$4pa$03$1@news.t-online.com>
	<cv7m2m$gp$1@usenet.otenet.gr> <cv7nh1$b57$03$1@news.t-online.com>
	<cv7r15$lhm$1@usenet.otenet.gr> <cv7vte$t1g$01$1@news.t-online.com>
Message-ID: <cv82aq$nlg$1@usenet.otenet.gr>

Diez B. Roggisch wrote:
>>Thank you for the links.
>>
>>They are irrelevant for me.
> 
> As usual. 

sorry.

>>>Just out of curiousity: How many python extensions are you planning to
>>>write?
>>
>>I estimate 10 to 100, depending on abstractional capabilities of the
>>extension system.
>>
>>>And how many lines of pure python code have you written in your life?
>>
>>0 (zero).
> 
> Awesome. Without any lines of code written, you have already identified the
> areas where python lacks features that have to be overcome with C-written
> extensions. 

writing code is not the only way.

> As usual, I stand with my mouth agape over your near-psychic
> abilities to analyze even the complexest matters without any actual
> fiddling with the nitty gritty details. 

Nothing special.

Abstraction, Generalization, Inhibition.

> The day where you team up with Uri Geller - who will make even the worst
> code running by just putting a printout of it on top of an image of the
> master himself - is to be feared by all of us humble developers who
> actually _deal_ with problems.

Don't worry.

Mr. Geller will be shortly hired by Sun Microsystems.

.

-- 
http://lazaridis.com


From fuzzyman at gmail.com  Thu Feb 10 06:04:14 2005
From: fuzzyman at gmail.com (fuzzyman at gmail.com)
Date: 10 Feb 2005 03:04:14 -0800
Subject: [ANN] Movable Python 0.4.6
Message-ID: <mailman.2342.1108070901.22381.python-announce-list@python.org>

A new release of Movable Python is available - 0.4.6

This fixes a few issues including a bug in the Python 2.2 support, and
a fix for a psyco/IPython incompatibility issue.

We have a new icon and logo thanks to Aidan Ashby -
http://aidan.voidspace.org.uk

Due to bugfixes (in movpy) we can now offer a prebuilt environment for
Python 2.2 that includes wxPython and SPE. The prebuilt environments
feature updated versions of several components (SPE, IPython, readline)

Downloads - http://sourceforge.net/projects/movpy
Documentation - http://www.voidspace.org.uk/python/movpy


What is Movable Python ?
-------------------------

Movable Python is a way of building portable, standalone, Python
environments. The result is a version of Python that can be used
without having to install python on the target machine. (Currently
windows only - but could be ported to Mac using py2app and Lunix using
cx_freeze). This means you can carry around a prebuilt python
environment on a USB memory stick - Python on a stick. Come and get
your gannet ripple, python on a stick..... [1]

This is useful for :

* Machines where you don't have admin rights (can't install programs)
* Where you need a portable 'Build, Test, and Run' Python environment
(will nicely fit on a usb memory stick)
* Having several versions of python on the same machine for
forward/backward compatibility testing
* Easily deploying python scripts without having to install python
* Try before you buy - test python without having to install it,
including new versions
* 'Python Runtime Environment'. '.py' files can be associated with
movpy

With the addition of wxPython, SPE [2], and IPython [3] it becomes a
full 'Build, Test, and Run' environment.


What's Available ?
-------------------

>From sourceforge ( http://sourceforge.net/projects/movpy )  :

The source distribution that allows you to customize and build your own
environments. This requires py2exe.

Prebuilt environments for Python 2.2, 2.3, and 2.4.

Environments are available either as 'basic' build, or 'standard'
build.

Basic comes with the standard library, psyco, and IPython.
Standard has wxPython and SPE included.


What Has Changed ?
-------------------

    2005/02/07      Version 0.4.6a
    Movpy Icon and image added by Aidan Ashby -
http://aidan.voidspace.org.uk
    Changes by Michael
    We use exec rather than eval (which shouldn't be used with
`multiple statement code objects`)
    IPython isn't called if -p is on (psyco and IPython don't play well
together yet)
    IPython won't be called if psyco.full() has been called in your
script
    locals() and globals() are now passed explicitly to interactive()
(optional if you use interactive yourself)
    (This was an attempt to make IPython work with psyco - which it
doesn't yet !)
    Fixed a bug in Python 2.2 support - 'exclude_modules' now works !
    Forced package import for encodings. SPE now works with python 2.2
- but still 'experimental'.
    Icon is now used in python 2.2
    Plus the pre-built environments use newer versions of readline,
IPython, and SPE


Regards,

Michael Foord
http://www.voidspace.org.uk/python/index.shtml




[1] For the 'Pythonically Challenged' this alludes to the python's
sketch where John Cleese is dressed as an usherette selling ice-creams
during the interval in a british film-house. He shouts: "Albatross!
Albatross! Stormy-petrel on a stick! Gannet ripple!". Silly Monty
Python reference supplied by John Davenport.

[2] Stanis Python Editor IDE - see http://spe.pycs.net

[3] IPython - enormously flexible interactive shell for Python. See
http://ipython.scipy.org



From AS at nospam.org  Sun Feb 20 05:31:48 2005
From: AS at nospam.org (Alberto Santini)
Date: Sun, 20 Feb 2005 11:31:48 +0100
Subject: Real-Time Fluid Dynamics for Games...
Message-ID: <cv9oum$7og$1@newsreader.mailgate.org>

I ported a Jos Stam's demo about Fluid mech to check
the difference of speed between C implementation and
Python. I think I achieved good results with Python
and there is space to improve, without to extend the
program with C routine, I mean.

-- 
Good hack,
Alberto Santini
(http://www.albertosantini.it/)


--------------------------- demo.py ---------------------------
""" Real-Time Fluid Dynamics for Games by Jos Stam (2003).
Parts of author's work are also protected
under U. S. patent #6,266,071 B1 [Patent].

Original paper by Jos Stam, "Real-Time Fluid Dynamics for Games".
Proceedings of the Game Developer Conference, March 2003

http://www.dgp.toronto.edu/people/stam/reality/Research/pub.html

Tested on
  python 2.4
  numarray 1.1.1
  PyOpenGL-2.0.2.01.py2.4-numpy23
  glut-3.7.6

How to use this demo:
  Add densities with the right mouse button
  Add velocities with the left mouse button and dragging the mouse
  Toggle density/velocity display with the 'v' key
  Clear the simulation by pressing the 'c' key
"""

import psyco
psyco.full()

import sys

from numarray import Float64, zeros

from solver import vel_step, dens_step

try:
  from OpenGL.GLUT import *
  from OpenGL.GL import *
  from OpenGL.GLU import *
except:
  print '''
ERROR: PyOpenGL not installed properly.
        '''
  sys.exit()

N = 32
size = N+2

dt = 0.1
diff = 0.0
visc = 0.0
force = 5.0
source = 100.0
dvel = False

win_x = 512
win_y = 512

omx = 0.0
omy = 0.0
mx = 0.0
my = 0.0
mouse_down = [False,False,False]

""" Start with two grids: one that contains the density values from the previous 
time step and one
that will contain the new values. For each grid cell of the latter we trace the 
cell's center
position backwards through the velocity field. We then linearly interpolate from 
the grid of
previous density values and assign this value to the current grid cell.
"""
u = zeros((size,size), Float64) # velocity
u_prev = zeros((size,size), Float64)
v = zeros((size,size), Float64) # velocity
v_prev = zeros((size,size), Float64)
dens = zeros((size,size), Float64) # density
dens_prev = zeros((size,size), Float64)


def clear_data():
  global u, v, u_prev, v_prev, dens, dens_prev, size

  u[0:size,0:size] = 0.0
  v[0:size,0:size] = 0.0
  u_prev[0:size,0:size] = 0.0
  v_prev[0:size,0:size] = 0.0
  dens[0:size,0:size] = 0.0
  dens_prev[0:size,0:size] = 0.0

def pre_display():
   glViewport(0, 0, win_x, win_y )
   glMatrixMode(GL_PROJECTION)
   glLoadIdentity()
   gluOrtho2D(0.0, 1.0, 0.0, 1.0)
   glClearColor(0.0, 0.0, 0.0, 1.0)
   glClear(GL_COLOR_BUFFER_BIT)

def post_display():
  glutSwapBuffers ()

def draw_velocity():
  h = 1.0/N

  glColor3f(1.0, 1.0, 1.0)
  glLineWidth(1.0)

  glBegin(GL_LINES)
  for i in range(1, N+1):
    x = (i-0.5)*h;
    for j in range(1, N+1):
      y = (j-0.5)*h
      glColor3f(1, 0, 0)
      glVertex2f(x, y)
      glVertex2f(x+u[i,j], y+v[i,j])
  glEnd()

def draw_density():
  h = 1.0/N

  glBegin(GL_QUADS)
  for i in range(0, N+1):
    x = (i-0.5)*h
    for j in range(0, N+1):
      y = (j-0.5)*h
      d00 = dens[i,j]
      d01 = dens[i,j+1]
      d10 = dens[i+1,j]
      d11 = dens[i+1,j+1]

      glColor3f(d00, d00, d00); glVertex2f(x, y)
      glColor3f(d10, d10, d10); glVertex2f(x+h, y)
      glColor3f(d11, d11, d11); glVertex2f(x+h, y+h)
      glColor3f(d01, d01, d01); glVertex2f(x, y+h)
  glEnd ()

def get_from_UI(d, u, v):
  global omx, omy

  d[0:size,0:size] = 0.0
  u[0:size,0:size] = 0.0
  v[0:size,0:size] = 0.0

  if not mouse_down[GLUT_LEFT_BUTTON] and not mouse_down[GLUT_RIGHT_BUTTON]: 
return

  i = int((mx/float(win_x))*N+1)
  j = int(((win_y-float(my))/float(win_y))*float(N)+1.0)

  if i<1 or i>N or j<1 or j>N: return


  if mouse_down[GLUT_LEFT_BUTTON]:
    u[i,j] = force * (mx-omx)
    v[i,j] = force * (omy-my)

  if mouse_down[GLUT_RIGHT_BUTTON]:
    d[i,j] = source

  omx = mx
  omy = my

def key_func(key, x, y):
  global dvel

  if key == 'c' or key == 'C':
    clear_data()
  if key == 'v' or key == 'V':
    dvel = not dvel

def mouse_func(button, state, x, y):
  global omx, omy, mx, my, mouse_down

  omx = mx = x;
  omy = my = y;
  mouse_down[button] = (state == GLUT_DOWN)

def motion_func(x, y):
  global mx, my

  mx = x; my = y

def reshape_func(width, height):
  global win_x, win_y

  glutReshapeWindow(width, height)
  win_x = width
  win_y = height

def idle_func():
  global dens, dens_prev, u, u_prev, v, v_prev, N, visc, dt, diff

  get_from_UI(dens_prev, u_prev, v_prev)
  vel_step(N, u, v, u_prev, v_prev, visc, dt)
  dens_step(N, dens, dens_prev, u, v, diff, dt)

  glutPostRedisplay()

def display_func():
  pre_display()
  if dvel: draw_velocity()
  else: draw_density()
  post_display()

def open_glut_window():
  glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE)
  glutInitWindowPosition(0, 0)
  glutInitWindowSize(win_x, win_y)
  glutCreateWindow("Alias | wavefront (porting by Alberto Santini)")
  glClearColor(0.0, 0.0, 0.0, 1.0)
  glClear(GL_COLOR_BUFFER_BIT)
  glutSwapBuffers()
  glClear(GL_COLOR_BUFFER_BIT)
  glutSwapBuffers()

  pre_display ()

  glutKeyboardFunc(key_func)
  glutMouseFunc(mouse_func)
  glutMotionFunc(motion_func)
  glutReshapeFunc(reshape_func)
  glutIdleFunc(idle_func)
  glutDisplayFunc(display_func)



if __name__ == '__main__':
  glutInit(sys.argv)
  clear_data()
  open_glut_window()
  glutMainLoop()
---------------------------------------------------------------

--------------------------- solver.py ---------------------------
""" Real-Time Fluid Dynamics for Games by Jos Stam (2003).
Parts of author's work are also protected
under U. S. patent #6,266,071 B1 [Patent].
"""
def set_bnd(N, b, x):
  """We assume that the fluid is contained in a
  box with solid walls: no flow should exit the walls. This simply means that 
the horizontal
  component of the velocity should be zero on the vertical walls, while the 
vertical component of
  the velocity should be zero on the horizontal walls. For the density and other 
fields considered
  in the code we simply assume continuity. The following code implements these 
conditions.
  """
  for i in range(1, N+1):
    if b == 1: x[0,i] = -x[1,i]
    else: x[0,i] = x[1,i]
    if b == 1: x[N+1,i] = -x[N,i]
    else: x[N+1,i] = x[N,i]
    if b == 2: x[i,0] = -x[i,1]
    else: x[i,0] = x[i,1]
    if b == 2: x[i,N+1] = -x[i,N]
    else: x[i,N+1] = x[i,N]

  x[0,0] = 0.5*(x[1,0]+x[0,1])
  x[0,N+1] = 0.5*(x[1,N+1]+x[0,N])
  x[N+1,0] = 0.5*(x[N,0]+x[N+1,1])
  x[N+1,N+1] = 0.5*(x[N,N+1]+x[N+1,N])

def lin_solve(N, b, x, x0, a, c):
  for k in range(0, 20):
    x[1:N+1,1:N+1] = (x0[1:N+1,1:N+1] + 
a*(x[0:N,1:N+1]+x[2:N+2,1:N+1]+x[1:N+1,0:N]+x[1:N+1,2:N+2]))/c
    set_bnd(N, b, x)

# Addition of forces: the density increases due to sources
def add_source(N, x, s, dt):
  size = (N+2)
  x[0:size,0:size] += dt*s[0:size,0:size]

# Diffusion: the density diffuses at a certain rate
def diffuse (N, b, x, x0, diff, dt):
  """ The basic idea behind our method is to find the densities which when 
diffused backward
  in time yield the densities we started with.
  The simplest iterative solver which works well in practice is Gauss-Seidel 
relaxation.
  """
  a = dt*diff*N*N
  lin_solve(N, b, x, x0, a, 1+4*a)

# Advection: the density follows the velocity field
def advect (N, b, d, d0, u, v, dt):
  """ The basic idea behind the advection step. Instead of moving the cell 
centers forward in
  time through the velocity field, we look for the particles which end up 
exactly at
  the cell centers by tracing backwards in time from the cell centers.
  """
  dt0 = dt*N;
  for i in range(1, N+1):
    for j in range(1, N+1):
      x = i-dt0*u[i,j]; y = j-dt0*v[i,j]
      if x<0.5: x=0.5
      if x>N+0.5: x=N+0.5
      i0 = int(x); i1 = i0+1
      if y<0.5: y=0.5
      if y>N+0.5: y=N+0.5
      j0 = int(y); j1 = j0+1
      s1 = x-i0; s0 = 1-s1; t1 = y-j0; t0 = 1-t1
      d[i,j] = s0*(t0*d0[i0,j0]+t1*d0[i0,j1])+s1*(t0*d0[i1,j0]+t1*d0[i1,j1])
  set_bnd (N, b, d)

def project(N, u, v, p, div):
  h = 1.0/N
  div[1:N+1,1:N+1] 
= -0.5*h*(u[2:N+2,1:N+1]-u[0:N,1:N+1]+v[1:N+1,2:N+2]-v[1:N+1,0:N])
  p[1:N+1,1:N+1] = 0
  set_bnd (N, 0, div)
  set_bnd (N, 0, p)
  lin_solve (N, 0, p, div, 1, 4)
  u[1:N+1,1:N+1] -= 0.5*(p[2:N+2,1:N+1]-p[0:N,1:N+1])/h # ??? not in the paper 
/h
  v[1:N+1,1:N+1] -= 0.5*(p[1:N+1,2:N+2]-p[1:N+1,0:N])/h # ??? not in the paper 
/h
  set_bnd (N, 1, u)
  set_bnd (N, 2, v)

# Evolving density: advection, diffusion, addition of sources
def dens_step (N, x, x0, u, v, diff, dt):
  add_source(N, x, x0, dt)
  x0, x = x, x0 # swap
  diffuse(N, 0, x, x0, diff, dt)
  x0, x = x, x0 # swap
  advect(N, 0, x, x0, u, v, dt)

# Evolving velocity: self-advection, viscous diffusion, addition of forces
def vel_step (N, u, v, u0, v0, visc, dt):
  add_source(N, u, u0, dt)
  add_source(N, v, v0, dt);
  u0, u = u, u0 # swap
  diffuse(N, 1, u, u0, visc, dt)
  v0, v = v, v0 # swap
  diffuse(N, 2, v, v0, visc, dt)
  project(N, u, v, u0, v0)
  u0, u = u, u0 # swap
  v0, v = v, v0 # swap
  advect(N, 1, u, u0, u0, v0, dt)
  advect(N, 2, v, v0, u0, v0, dt)
  project(N, u, v, u0, v0)
-----------------------------------------------------------------




From jeremy+plusnews at jeremysanders.net  Wed Feb  2 09:36:34 2005
From: jeremy+plusnews at jeremysanders.net (Jeremy Sanders)
Date: Wed, 02 Feb 2005 14:36:34 +0000
Subject: webbrowser.py
Message-ID: <pan.2005.02.02.14.36.33.766473@jeremysanders.net>

It occurs to me that webbrowser could be more intelligent on Linux/Unix
systems. Both Gnome and KDE have default web browsers, so one could use
their settings to choose the appropriate browser.

I haven't been able to find a freedesktop common standard for web browser,
however.

Firefox now sets itself as a "default browser" on startup, so python could
also look for a similar setting.

webbrowser could identify whether it was running under KDE/Gnome (maybe
scan the processes?), identify the correct desktop's browser (or just use
Gnome, maybe), and start that web browser.

Comments?

Jeremy



From a.schmolck at gmx.net  Sun Feb 27 14:07:43 2005
From: a.schmolck at gmx.net (Alexander Schmolck)
Date: Sun, 27 Feb 2005 19:07:43 +0000
Subject: [ANN] mlabwrap v0.9 released
Message-ID: <mailman.3136.1109597575.22381.python-announce-list@python.org>

This release just adds OS X support to setup.py (thanks to Josh Marshall).
I've also made some recent improvements to the website, based on user
feedback.

In the absence of any bug reports so far I'd tentatively consider mlabwrap as
stable.

Dowload from:

<http://mlabwrap.sourceforge.net/>


What is mlabwrap?
-----------------
A high-level python to matlab(tm) bridge (low-level access is also possible).

It should work with recent python >=2.3 and matlab(tm) >=6.0 versions and
under practically any supported by both matlab and python (I'm using linux
myself, but thanks to user feeback windows and OS X should also work fine).

Here is a short demo snippet:

    >>> from mlabwrap import mlab
    >>> import Numeric
    >>> mlab.lookfor('singular value')
    GSVD   Generalized Singular Value Decompostion.
    SVD    Singular value decomposition.
    [...]
    >>> help(mlab.svd)
    mlab_command(*args, **kwargs)
     SVD    Singular value decomposition.
        [U,S,V] = SVD(X) produces a diagonal matrix S, of the same
        dimension as X and with nonnegative diagonal elements in
    [...]
    >>> mlab.svd(array([[1,2], [1,3]]))
    array([[ 3.86432845],
          [ 0.25877718]])

'as


From __peter__ at web.de  Thu Feb  3 16:48:02 2005
From: __peter__ at web.de (Peter Otten)
Date: Thu, 03 Feb 2005 22:48:02 +0100
Subject: Basic file operation questions
References: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
	<opsllt9r191js0xs@news.telkomsa.net>
	<mailman.1808.1107431422.22381.python-list@python.org>
	<ctt53b$l5u$00$1@news.t-online.com>
	<opslnm1cge1js0xs@news.telkomsa.net>
Message-ID: <ctu62q$gud$04$1@news.t-online.com>

Caleb Hattingh wrote:

>> Yes, you can even write
>>
>> f = open("data.txt")
>> for line in f:
>>     # do stuff with line
>> f.close()
>>
>> This has the additional benefit of not slurping in the entire file at
>> once.
> 
> Is there disk access on every iteration?   I'm guessing yes?  It shouldn't
> be an issue in the vast majority of cases, but I'm naturally curious :)

Well, you will hardly find an OS that does no buffering of disk access --
but file.next() does some extra optimization as Steven already explained.
Here are some timings performed on the file that has the first-hand
information about Python's file buffering strategy :-)

$ python2.4 -m timeit 'for line in file("fileobject.c"): pass'
1000 loops, best of 3: 528 usec per loop
$ python2.4 -m timeit 'for line in file("fileobject.c").readlines(): pass'
1000 loops, best of 3: 635 usec per loop
$ python2.4 -m timeit 'for line in iter(file("fileobject.c").readline, ""):
pass'
1000 loops, best of 3: 1.59 msec per loop
$ python2.4 -m timeit 'f = file("fileobject.c")' 'while 1:' '  if not
f.readline(): break'
100 loops, best of 3: 2.08 msec per loop

So not only is

for line in file(...):
   # do stuff

the most elegant, it is also the fastest. file.readlines() comes close, but
is only viable for "small" files.

Peter



From a.schmolck at gmx.net  Fri Feb 18 15:27:10 2005
From: a.schmolck at gmx.net (Alexander Schmolck)
Date: Fri, 18 Feb 2005 20:27:10 +0000
Subject: Python, Matlab and AI question
References: <mailman.2789.1108700285.22381.python-list@python.org>
	<cv4k1h$i3f$1@news1.ucsd.edu>
Message-ID: <yfsekfdipgh.fsf@black4.ex.ac.uk>

Robert Kern <rkern at ucsd.edu> writes:

> dataangel wrote:
>> I'm a student who's considering doing a project for a Machine Learning class
>> on pathing (bots learning to run through a maze). The language primarily
>> used by the class has been Matlab. I would prefer to do the bulk of the
>> project in python because I'm familiar with pygame (for the visuals) but I
>> already have a lot of AI code written in Matlab.
>> I'd like to be able to call Matlab code from within python. I'm not sure
>> this is possible. My code runs in Octave just fine.
>
> There have been some bridges between Matlab and Python, but most of them are
> old, I believe.
>
>    http://claymore.engineer.gvsu.edu/~steriana/Python/pymat.html

Actually, I've written a highlevel matlab-python bridge (based on bugfixed and
slightly extended version of the original pymat) which is quite up-to-date; by
and large it makes using matlab from python as easy as if matlab were just
some python library:

>>> from mlabwrap import mlab; mlab.plot([1,2,3],'-o')
<imagine plot here>
>>> mlab.sin([4,5,6])
array([[-0.7568025 ],
       [-0.95892427],
       [-0.2794155 ]])

As you can see from the last example there a certain minor idiosyncrasies
stemming from unbridgable semantic differences between matlab and python
(matlab doesn't have "real" vectors, which means that Numeric vectors are
translated to Nx1 matrices), also the call to matlab of course incurs a
significant overhead compared to Numeric.sin.

All in all I it works quite well for me, though (I've been using it
productively for years now and a couple of other people have also used it) --
so I guess I should finally announce it (there were a few minor things I
wanted to add first, but since people periodically ask for something like it
on c.l.py so now would seem like a good time).

You can find it on sourceforge:

 <http://mlabwrap.sf.net>

I'd appreciate feedback.

'as

p.s. never mind the project activity meter at 0% -- as you can see the latest
version was uploaded mid january this year.


From pf_moore at yahoo.co.uk  Mon Feb 21 12:03:20 2005
From: pf_moore at yahoo.co.uk (Paul Moore)
Date: Mon, 21 Feb 2005 17:03:20 +0000
Subject: Unittest - testing properties (read-only attributes)
Message-ID: <uu0o5c0br.fsf@yahoo.co.uk>

I have a class with a read-only attribute, and I want to add a unit
test to ensure that it really *is* read-only. I can do this as

    def test_readonly(self):
	"""Value and multiplier must be readonly"""
	try:
	    self.combat.value = 1
	    self.fail("Value is not read only")
	except AttributeError:
	    pass

That works, but it seems a bit clumsy. Is there a better way?

Thanks,
Paul.
-- 
XML with elementtree is what makes me never have think about XML
again. -- Istvan Albert


From davidf at sjsoft.com  Mon Feb 14 05:08:48 2005
From: davidf at sjsoft.com (David Fraser)
Date: Mon, 14 Feb 2005 12:08:48 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cuo71l$gig$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
Message-ID: <cupstp$an7$2@ctb-nnrp2.saix.net>

Ilias Lazaridis wrote:
> I'm a newcomer to python:
> 
> [EVALUATION] - E01: The Java Failure - May Python Helps?
> http://groups-beta.google.com/group/comp.lang.python/msg/75f0c5c35374f553
> 
> -
> 
> I've download (as suggested) the python 2.4 installer for windows.
> 
> Now I have problems to compile python extension that some packages 
> depend on.
> 
> I use the MinGW open-source compiler.
> 
> -
> 
> My questions:
> 
> a) Why does the Python Foundation not provide additionally a binary 
> version, compiled with MinGW or another open-source compiler?
> 
> b) Why does the Python Foundation not ensure, that the python 
> source-code is directly compilable with MinGW?
> 
> c) Why are the following efforts not _directly_ included in the python 
> source code base?
> 
> http://jove.prohosting.com/iwave/ipython/pyMinGW.html
> 
> above link found in this thread:
> 
> http://groups-beta.google.com/group/comp.lang.python/msg/c9f0444c467de525
> 
> d) Is it really neccessary that I dive into such adventures, to be able 
> to do the most natural thing like: "developing python extensions with 
> MinGW"?
> 
> http://starship.python.net/crew/kernr/mingw32/Notes.html
> 
> e) Is there any official statement available regarding the msvcr71.dll 
> and other MS licensing issues?
> 
> [see several threads "[Python-Dev] Is msvcr71.dll re-redistributable?"]
> 
> http://mail.python.org/pipermail/python-dev/2005-February/thread.html
> 
> f) Are there any official (Python Foundation) statements / rationales 
> available, which explain why the MinGW compiler is unsupported, although 
> parts of the community obviously like to use it?
> 
> http://groups-beta.google.com/group/comp.lang.python/msg/dc3474e6c8053336
> 
> -
> 
> I just want to understand.
> 
> Thankfull for any pointer to official documents / statements.
> 
> [google is _not_ a fried here. I like to have a stable development 
> environment, which is supported by the official projects, thus it can 
> pass quality-assurance without beeing afraid about every next release.]


Just to add to all the other answers:

Don't just complain, submit patches and work at keeping them maintained. 
If this is done for a while it may be more of an argument for having 
them included

David


From kartic.krishnamurthy at gmail.com  Tue Feb  1 14:06:57 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 1 Feb 2005 11:06:57 -0800
Subject: How do you do arrays
In-Reply-To: <tbunce-0102051052450001@192.168.1.12>
References: <tbunce-0102051052450001@192.168.1.12>
Message-ID: <1107284817.848551.79000@c13g2000cwb.googlegroups.com>

Tom,

Before you use iMatrix[index], you have to tell python to use iMatrix
as an array. You will do that using iMatrix = [] *outside* the loop.

iMatrix = []
while index < majorlop1: # rest of the loop statements

Since you are new, please take a look at the Python tutorial to get you
started.
http://docs.python.org/tut/tut.html

Thanks,
-Kartic



From alanmk at hotmail.com  Sat Feb 12 13:12:34 2005
From: alanmk at hotmail.com (Alan Kennedy)
Date: Sat, 12 Feb 2005 18:12:34 +0000
Subject: is there a safe marshaler?
In-Reply-To: <420d2441$0$28991$e4fe514c@news.xs4all.nl>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<9RMOd.47295$Z14.32810@news.indigo.ie>
	<420bd184$0$28994$e4fe514c@news.xs4all.nl>
	<DtROd.47310$Z14.32852@news.indigo.ie>
	<420bedb4$0$28975$e4fe514c@news.xs4all.nl>
	<YjTOd.47318$Z14.32821@news.indigo.ie>
	<420d2441$0$28991$e4fe514c@news.xs4all.nl>
Message-ID: <hCrPd.47388$Z14.33161@news.indigo.ie>

[Irmen de Jong]
> Interestingly enough, I just ran across "Flatten":
> http://sourceforge.net/project/showfiles.php?group_id=82591&package_id=91311 
> 
> "...which aids in serializing/unserializing networked data securely,
> without having to fear execution of code or the like."
> 
> Sounds promising!

Well, I'm always dubious of OSS projects that don't even have any bugs 
reported, let alone fixed: no patches submitted, etc, etc.

http://sourceforge.net/tracker/?group_id=82591

Though maybe I'm missing something obvious?

-- 
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan


From raghulj at gmail.com  Tue Feb 22 23:09:50 2005
From: raghulj at gmail.com (Raghul)
Date: 22 Feb 2005 20:09:50 -0800
Subject: user interface for python
Message-ID: <1109131790.140672.209730@l41g2000cwc.googlegroups.com>

Hi,
   Which of the UI I can used for my program that I can use both in
windows and in Linux. Is it possible for me to use Wxpython for my
program so that it can run on both the windows and linux machine? Will
it be platform independent?



From fumanchu at amor.org  Tue Feb 15 13:00:06 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Tue, 15 Feb 2005 10:00:06 -0800
Subject: replacing ASP/VBScript with Python
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E3398431@exchange.hqamor.amorhq.net>

Peter Maas wrote:
> I have inherited an extremely messy ASP/VBScript application which
> is a pain for me to support. Now the customer is thinking about a
> redesign. I'd like to rewrite the whole thing in Python but the app
> has to meet some conditions like
> 
> - IIS frontend
> - MSSQL db server
> - Win32 authentication
> - No 'ugly' URLs like http://server/cgi-bin/frontend.cgi?main.py
> - Performance: intranet with ~ 1000 users

None of those sound like a problem.

> My personal preferences:
> 
> - I'd rather do this in plain Python than using e.g. Zope because I
>    fear the additional complexity of handling Zope and make it seam-
>    lessly work with IIS.

I had the same fear. :)

> - I'd like to do session handling in Python because ASP's session
>    object is quite limited and some of the ASP app's mess is caused
>    by trying to use it for compound data type storage. OTOH I could
>    pickle Python objects to a string and store that in an ASP session.

> In the meantime I have searched the internet and found plenty of
options:
> 
> - plain cgi with fastcgi and mod_rewrite for IIS to transform the URL
> - quixote cgi with fastcgi and mod_rewrite
> - Webware + wkcgi
> - Python ASP (registering Python with Pywin32 as ASP language)
> - mxODBC + SQL ODBC driver
> - pyADO + SQL MDAC driver
> 
> I'm now confident that it is doable and keen on finding out. The usual
> question: what is the one and best way to do it? ;)

Python ASP (pywin32), but put as little code as possible into the
ASP--make it just a stub to call the real Python app. That app will be
running persistently in the background, which should obviate most of the
need for session support. That's been my experience, anyway.

Here's an example (from
http://www.aminus.org/rbre/cation/html/admin/ASP.html):

<%@Language=Python%>
<%
from cation.html.uiasp import UserInterfaceASP
from cation import catapp

ui = UserInterfaceASP(catapp)
ui.request(Request, Response)
%>

The only downside is that ASP expects a physical file for every URL, so
you'll either have lots of dumb copies of the stub, or a single
dispatcher (and the ugly URL's you wanted to avoid). With a little
planning, you can have the stubs auto-generated.


Database side: try them all and see which is best with your dataset. ;)


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org


From jfj at freemail.gr  Tue Feb  8 03:39:30 2005
From: jfj at freemail.gr (jfj)
Date: Tue, 08 Feb 2005 00:39:30 -0800
Subject: Confused with methods
In-Reply-To: <INednSf1ioDSOprfRVn-jg@comcast.com>
References: <mailman.2022.1107703890.22381.python-list@python.org>	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>	<slrnd0enor.26q.apardon@rcpc42.vub.ac.be>	<1grmd4z.1tlm4e61650vedN%aleaxit@yahoo.com>	<slrnd0f07t.26q.apardon@rcpc42.vub.ac.be>	<1grmg8s.17t7tj4180jdj6N%aleaxit@yahoo.com>
	<mailman.2075.1107792148.22381.python-list@python.org>
	<INednSf1ioDSOprfRVn-jg@comcast.com>
Message-ID: <42087AC2.5070708@freemail.gr>

Steven Bethard wrote:

> 
> For your benefit, and the benefit of others who make this same mistake, 
> I'll rewrite your original post in a manner that won't seem so 
> self-important and confrontational[1].
> 

``People who code too much tend to get authoritative'', in general.

I am an arrogant noob -- just like arrogant experts...


Inconsistenly y'rs

jfj



From danperl at rogers.com  Mon Feb  7 08:42:46 2005
From: danperl at rogers.com (Dan Perl)
Date: Mon, 7 Feb 2005 08:42:46 -0500
Subject: CGI POST problem was: How to read POSTed data
References: <mailman.1980.1107622913.22381.python-list@python.org>
	<dMydnSAsTcgE2JjfRVn-oQ@rogers.com>
	<1107659974.048175.221770@z14g2000cwz.googlegroups.com>
	<m6ednTUprqnfYZvfRVn-uA@rogers.com>
	<1107756968.920802.99540@c13g2000cwb.googlegroups.com>
Message-ID: <m8idnT5Q-L7E7ZrfRVn-gg@rogers.com>


"M.E.Farmer" <mefjr75 at hotmail.com> wrote in message 
news:1107756968.920802.99540 at c13g2000cwb.googlegroups.com...
> Sweet!
> Glad you fixed it,  and documented it all!
> Thanks for the followups.
> Now the next poor soul to stumble in can get the right fix.
> Never know when it could be me ;)

Thanks for the comments.  I did indeed post the info on the bug to let other 
people know about it.

Anyway, this was more of a learning experience than I intended it to be. 
And now it's time for me to move on and to get into CherryPy. 




From belred at gmail.com  Thu Feb 24 20:48:47 2005
From: belred at gmail.com (Bryan)
Date: Thu, 24 Feb 2005 17:48:47 -0800
Subject: [perl-python] generic equivalence partition
In-Reply-To: <1109245733.261643.219420@f14g2000cwb.googlegroups.com>
References: <1109245733.261643.219420@f14g2000cwb.googlegroups.com>
Message-ID: <cvlvu8$qua$1@sea.gmane.org>

Xah Lee wrote:
> another functional exercise with lists.
> 
> Here's the perl documentation. I'll post a perl and the translated
> python version in 48 hours.
> 
> =pod
> 
> parti(aList, equalFunc)
> 
> given a list aList of n elements, we want to return a list that is a
> range of numbers from 1 to n, partition by the predicate function of
> equivalence equalFunc. (a predicate function is a function that
> takes two arguments, and returns either True or False.)
> 
> Note: a mathematical aspect: there are certain mathematical constraints
> on the a function that checks equivalence. That is to say, if a==b,
> then b==a. If a==b and b==c, then a==c. And, a==a. If a equivalence
> function does not satisfy these, it is inconsistent and basically give
> meaningless result.
> 
> example:
> parti([['x','x','x','1'],
> ['x','x','x','2'],
> ['x','x','x','2'],
> ['x','x','x','2'],
> ['x','x','x','3'],
> ['x','x','x','4'],
> ['x','x','x','5'],
> ['x','x','x','5']], sub {$_[0]->[3] == $_[1]->[3]} )
> 
> returns
>  [[1],['2','3','4'],['5'],['6'],['7','8']];
> 
> =cut
> 
> In the example given, the input list's elements are lists of 4
> elements, and the equivalence function is one that returns True if the
> last item are the same.
> 
> Note that this is a generic function. The input can be a list whose
> elements are of any type. What "parti" does is to return a partitioned
> range of numbers, that tells us which input element are equivalent to
> which, according to the predicate given. For example, in the given
> example, it tells us that the 2nd, 3rd, 4th elements are equivalent.
> And they are equivalent measured by the predicate function given, which
> basically tests if their last item are the same integer. (note that if
> we want to view the result as indexes, then it is 1-based index. i.e.
> counting starts at 1.)
> 
> PS if you didn't realize yet, nested lists/dictionaries in perl is a
> complete pain in the ass.
> 
> PS note that the code "sub {$_[0]->[3] == $_[1]->[3]}" is what's called
> the lambda form, in Perl.
> 
>  Xah
>  xah at xahlee.org
>  http://xahlee.org/PageTwo_dir/more.html
> 

this is the first thing that came to my mind.  i'm sure there are more clever 
ways to do this.

elements = [['x', 'x', 'x', '1'],
             ['x', 'x', 'x', '2'],
             ['x', 'x', 'x', '2'],
             ['x', 'x', 'x', '2'],
             ['x', 'x', 'x', '3'],
             ['x', 'x', 'x', '4'],
             ['x', 'x', 'x', '5'],
             ['x', 'x', 'x', '5']]
pos = {}

for i, element in enumerate(elements):
     pos.setdefault(element[-1], []).append(i+1)

p = pos.values()
p.sort()
[[1], [2, 3, 4], [5], [6], [7, 8]]


bryan



From dontwant at spam.com  Fri Feb 11 11:20:29 2005
From: dontwant at spam.com (Courageous)
Date: Fri, 11 Feb 2005 08:20:29 -0800
Subject: THREAD_STACK_SIZE and python performance?
References: <mailman.2385.1108124886.22381.python-list@python.org>
Message-ID: <jnmp019h6robrshsclcc64bu7dhl79lpkg@4ax.com>


>The FreeBSD patch, setting the value to 0x100000
>seems to be enough for most of our zope servers,...

Is that value in /bytes/? In modern solaris implementations
of posix threads, the default stack size is 2 megabytes fo 64
bit machines.

I can't fathom what your performance consideration would be;
I'd think there'd not be one, with any reasonable amount of
memory on your server.

C//



From Scott.Daniels at Acm.Org  Mon Feb 28 12:03:56 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Mon, 28 Feb 2005 09:03:56 -0800
Subject: Newbie question -- fiddling with pictures.
In-Reply-To: <cvv8k2$19ov$1@newsreader02.ops.uunet.co.za>
References: <cvv8k2$19ov$1@newsreader02.ops.uunet.co.za>
Message-ID: <42234ab9$1@nntp0.pdx.net>

Ryan White wrote:
 > Subject: Newbie question

Not a very good subject -- many people will not even look at it unless
you describe what your question is about.

> I'm wanting to use python to display some jpeg images, maybe present them at
> a percentage of their actual size etc.
> How do I display an image in Python? - I've run over Tkinter, but obviously
> in all the wrong places.
You probably want Fredrik Lundh's PIL (Python Imaging Library) package
to read and manipulate the images, and then use TKinter to display the
images.

--Scott David Daniels
Scott.Daniels at Acm.Org


From steven.bethard at gmail.com  Sun Feb  6 15:03:27 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 06 Feb 2005 13:03:27 -0700
Subject: loops -> list/generator comprehensions
In-Reply-To: <1107718117.221204.80410@l41g2000cwc.googlegroups.com>
References: <1107718117.221204.80410@l41g2000cwc.googlegroups.com>
Message-ID: <yZOdnSUV0umX5ZvfRVn-vQ@comcast.com>

jamesthiele.usenet at gmail.com wrote:
> I wrote this little piece of code to get a list of relative paths of
> all files in or below the current directory (*NIX):
> 
>     walkList  = [(x[0], x[2]) for x in os.walk(".")]
>     filenames = []
>     for dir, files in walkList:
>         filenames.extend(["/".join([dir, f]) for f in files])
> 
> It works fine, I don't need to change it, but I know there is a one
> liner list/generator comprehension to do this - I'm just not well
> enough versed in comprehensions to figure it out. Can someone please
> show me what it is?

I've used os.path.join instead of "/".join since it's more general, but 
other than that, this should be eqivalent:

filenames = [os.path.join(dirpath, filename)
              for dirpath, _, filenames in os.walk('.')
              for filename in filenames]


> Even better, is there a generalized way to transform simple loops into
> comprehensions that someone can point me to?

Well, generally, you need to write your loops to use an append, and then 
the translation to LC is simpler.

filenames = []
for dirpath, _, filenames in os.walk('.'):
     for filename in filenames:
         filenames.append(os.path.join(dirpath, filename))

Now that you know what it looks like with an append, you simply move the 
expression in the append to the top, and leave the fors in the same order:

filenames = [os.path.join(dirpath, filename)
              for dirpath, _, filenames in os.walk('.')
              for filename in filenames]

HTH,

STeVe


From harlinseritt at yahoo.com  Wed Feb 23 21:36:06 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 23 Feb 2005 18:36:06 -0800
Subject: Question about logfiles in Python
In-Reply-To: <mailman.2986.1109203703.22381.python-list@python.org>
References: <mailman.2986.1109203703.22381.python-list@python.org>
Message-ID: <1109212566.723878.83400@g14g2000cwa.googlegroups.com>

I'm not familiar with Exchange log files but this can be done rather
easily assuming the log file is a flat text file (which usually these
are not-- like NT event logs).

search_str = "words and phrases"
data = open(LogFile, 'r').read()

if search_str in data:
   flag = 1

If they are binary files, you may have to use a special module (or
write one yourself if it doesn't exist). A good place to look is in
Mark Hammond's Win32 modules. You'll find some stuff here:
http://starship.python.net/crew/mhammond/

Hope this sends you in the right direction.



From petr at tpc.cz  Mon Feb 14 16:43:44 2005
From: petr at tpc.cz (McBooCzech)
Date: 14 Feb 2005 13:43:44 -0800
Subject: Considering python - have a few questions.
References: <eZAPd.21496$Ka6.148459@news1.mts.net>
Message-ID: <1108417424.289500.85300@g14g2000cwa.googlegroups.com>

Sorry, I have forgotten to mention binding for Firebird to Python:
kinterbasdb
http://kinterbasdb.sourceforge.net/

Petr Jakes



From jackdied at jackdied.com  Fri Feb  4 17:46:44 2005
From: jackdied at jackdied.com (Jack Diederich)
Date: Fri, 4 Feb 2005 17:46:44 -0500
Subject: Persistence design [was: RE: OT: why are LAMP sites slow?]
In-Reply-To: <3A81C87DC164034AA4E2DDFE11D258E3398367@exchange.hqamor.amorhq.net>
References: <3A81C87DC164034AA4E2DDFE11D258E3398367@exchange.hqamor.amorhq.net>
Message-ID: <20050204224644.GG1607@performancedrivers.com>

On Fri, Feb 04, 2005 at 10:31:19AM -0800, Robert Brewer wrote:
> Jack Diederich wrote:
> > *ding*ding*ding*  The biggest mistake I've made most 
> > frequently is using
> > a database in applications.  YAGNI.  Using a database at all has it's
> > own overhead.  Using a database badly is deadly.  Most sites would
> > benefit from ripping out the database and doing something simpler.
> > Refactoring a database on a live system is a giant pain in the ass,
> > simpler file-based approaches make incremental updates easier.
> > 
> > The Wikipedia example has been thrown around, I haven't looked at the
> > code either;  except for search why would they need a database to
> > look up an individual WikiWord?  Going to the database 
> > requires reading
> > an index when pickle.load(open('words/W/WikiWord')) would 
> > seem sufficient.
> > 
> ...
> > 
> > If there is interest I'll follow up with some details on my own LAMP
> > software which does live reports on gigs of data and - you 
> > guessed it -
> > I regret it is database backed.  That story also involves why 
> > I started
> > using Python (the prototype was in PHP).
> 
> I'd be interested, if only selfishly to hear more potential use cases
> for *my* projects. ;)

It would be long so I'll spin it into a blog piece.  They seem to be 
all the rage these days *0.5 wink*
 
> One of my goals for Dejavu* (my ORM) is to abstract persistence to the
> point that you can easily test your actual, live dataset against many
> potential storage mechanisms (i.e. multiple DB's, but also shelve,
> etc.). I need to finish the migration tools, but it's well on the way.

I just looked at the docs, looks like a nicer version of the homespun
one I use.  If someone lends you the time machine set the year to 2001
and I'll use Dejavu instead. Reading the docs also makes me long for
class decorators (again).  I use metaclasses to register tables to
databases, I see you inspect globals.

ex in a better world:

mydb = Database('foo')

@mydb.add_table
class Foo(Table):
  col1 = int
  col2 = str

@mydb.add_table
class Bar(Table):
  foo_id = str
  colb = unicode

*sigh* maybe in 2.5?

-Jack


From jkjone2002 at att.net  Thu Feb 17 10:15:48 2005
From: jkjone2002 at att.net (john san)
Date: Thu, 17 Feb 2005 10:15:48 -0500
Subject: [newbie]How to install python under DOS and is there any
	Wxpython can be installed under dos?
References: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
	<1108557065.547230.254540@z14g2000cwz.googlegroups.com>
	<b9-dnTQOwoYK647fRVn-2Q@rogers.com>
	<11172sa1sg2svc8@corp.supernews.com>
	<l4OdneC_7ZH2oInfRVn-3A@rogers.com>
	<zkZQd.9062$Sl3.275762@news4.e.nsc.no>
	<WC0Rd.5165$VI5.2979@newsread3.news.atl.earthlink.net>
Message-ID: <4K6dneoBWMc4KInfRVn-rA@rogers.com>

yes. u need mod-xbox. since its be easy done and we already have OS,
"Python" support what we need now is only that "Python" can easy to coding
and show "window" program just like wt we can do under Windows.


"Lucas Raab" <dotpyFE at gmail.com> ????
news:WC0Rd.5165$VI5.2979 at newsread3.news.atl.earthlink.net...
> Leif B. Kristensen wrote:
> > john san skrev:
> >
> >
> >>Actually the "windows" running very good under the xbox-NTOS via
> >>xboxmediacenter. its just limited functions(not easy to programming
> >>the "windows" prog.), if we can find WxPython-like can be ported (I
> >>can import *
> >>from it  to my xboxPython) )it will be a great great ......... You
> >>will have HD screen and web surfing on HDTV and computing on HDTV.
> >>think about it! That is a real thing the python-like lang. should to
> >>do otherwise just a garbage(toy).
> >
> >
> > You can run Linux with MythTV on an XBox. Does all the things you want,
> > and of course it will run WxPython.
>
> But does that involve modding the Xbox?? As in messing with the hardware??




From fredrik at pythonware.com  Mon Feb 14 17:09:43 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 23:09:43 +0100
Subject: [NooB] a Variable in multiple quotes...
References: <614c778e.0502130204.5824cddf@posting.google.com><378onnF5aoj75U1@individual.net>
	<614c778e.0502141354.53d6675b@posting.google.com>
Message-ID: <cur7e4$4al$1@sea.gmane.org>

"administrata" wrote:

>> Oh: from the subject line, I'm guessing that you want it to say "John
>> used to love pizza" instead? In that case, try doing this:
>>
>> I = "John"
>> print "%s used to love pizza" % I
>
> How can I do it with several variables?
>
> About 10 or more...

two:

    print I, "used to love", J

or

    print "%s used to love %s" % (I, J)

three:

    print I, "used to", J, K
    print "%s used to %s %s" % (I, J, K)

five:

    print I, J, "to", K, L, M
    print "%s %s to %s %s %s" % (I, J, K, L, M)

(you get the idea)

for more on this, and some variations, read the "fancier output
formatting" chapter in the tutorial again:

    http://docs.python.org/tut/node9.html

(you've read the tutorial before, right?)

</F> 





From jerf at jerf.org  Fri Feb  4 12:42:01 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 04 Feb 2005 12:42:01 -0500
Subject: returning True, False or None
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com> <raRMd.9382$s16.4267@trndny02>
	<mailman.1922.1107553495.22381.python-list@python.org>
Message-ID: <pan.2005.02.04.17.42.00.550123@jerf.org>

On Fri, 04 Feb 2005 16:44:48 -0500, Daniel Bickett wrote:
> [ False , False , True , None ]
> 
> False would be returned upon inspection of the first index, even
> though True was in fact in the list. The same is true of the code of
> Jeremy Bowers, Steve Juranich, and Jeff Shannon. As for Raymond
> Hettinger, I can't even be sure ;)

Nope. To recall, my code was: 

seenFalse = False
for item in list:
	if item: return True
	if item is False: seenFalse = True
if seenFalse:
	return False
return None

So, turning that into a real function and not a sketch:

Python 2.3.4 (#1, Jan 25 2005, 21:29:33) 
[GCC 3.4.3  (Gentoo Linux 3.4.3, ssp-3.4.3-0, pie-8.7.6.6)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> def thingy(l):
...     seenFalse = False
...     for item in l:
...             if item: return True
...             if item is False: seenFalse = True
...     if seenFalse:
...             return False
...     return None
... 
>>> thingy([ False , False , True , None ])
True
>>> 

The defense rests, your honor. :-)

(I like the later use of "returnValue" and the reduce solution was cute
and quite educational (very appropriate here). I deliberately eschewed
fanciness, though.)


From harlinseritt at yahoo.com  Wed Feb 16 07:28:25 2005
From: harlinseritt at yahoo.com (Harlin)
Date: 16 Feb 2005 04:28:25 -0800
Subject: MYSQL - how to install ?
References: <1108547199.260223.211450@f14g2000cwb.googlegroups.com>
Message-ID: <1108556905.444394.210020@l41g2000cwc.googlegroups.com>

For MySQL on windows go here:
http://dev.mysql.com/get/Downloads/MySQL-4.1/mysql-4.1.10-win32.zip/from/pick#mirrors

For Python 2.3.5 binary installer for win32:
http://www.python.org/ftp/python/2.3.5/Python-2.3.5.exe



From steve at holdenweb.com  Sat Feb  5 09:03:44 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 05 Feb 2005 09:03:44 -0500
Subject: Trouble converting hex to decimal?
In-Reply-To: <mailman.1968.1107611497.22381.python-list@python.org>
References: <mailman.1968.1107611497.22381.python-list@python.org>
Message-ID: <ms4Nd.103636$Jk5.13299@lakeread01>

Earl Eiland wrote:

> I'm trying to process the IP packet length field, as recorded by pcap
> (Ethereal) and recovered using pcapy.  When I slice out those bytes, I
> get a value that shows in '\x00' format, rather than '0x00'.  Neither
> int() nor eval() are working.  How do I handle this?
> 
> Earl Eiland
> 

You could either reconstruct the value yourself from the ord() values of 
the individual bytes, or look at the struct module which can help you 
with this kind of decoding task.

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From ncoghlan at iinet.net.au  Wed Feb 23 05:43:08 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Wed, 23 Feb 2005 20:43:08 +1000
Subject: Style guide for subclassing built-in types?
In-Reply-To: <1109151417.903188.73790@f14g2000cwb.googlegroups.com>
References: <ba1e306f.0502221846.70cb4d5c@posting.google.com>	<1109127834.660822.247120@g14g2000cwa.googlegroups.com>	<1109150091.356411.150460@l41g2000cwc.googlegroups.com>
	<1109151417.903188.73790@f14g2000cwb.googlegroups.com>
Message-ID: <421C5E3C.2080404@iinet.net.au>

janeaustine50 at hotmail.com wrote:
> p.s. the reason I'm not sticking to reversed or even reverse : suppose
> the size of the list is huge.

Reversed is an iterator - it does NOT copy the list. In other words, reversed 
already does pretty much what you want.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From adam at cognitcorp.com  Tue Feb  8 17:40:31 2005
From: adam at cognitcorp.com (Adam DePrince)
Date: Tue, 08 Feb 2005 17:40:31 -0500
Subject: Python versus Perl ?
In-Reply-To: <opslwvc2wx1js0xs@news.telkomsa.net>
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
	<hkhc01dnpmmhn980quijqil40653qipdki@4ax.com>
	<cuavn1$bag$1@nntp.msstate.edu>  <opslwvc2wx1js0xs@news.telkomsa.net>
Message-ID: <1107902431.3672.25.camel@localhost.localdomain>

On Tue, 2005-02-08 at 22:44, Caleb Hattingh wrote:
> Hi m
> 
> Speed is a contentious issue here.  Point is, if you really need raw  
> speed, why stop only at Perl and Python?  There are plenty of statically  
> compiled languages that will produce native binaries.
> 
> The relative difference in speed between Perl and Python, whatever it is,  
> is completely washed out by the enormous jump using, say, C for example  
> [please, everyone else, I am aware of all the mitigating circumstances  
> regarding, e.g. parts of the standard library written in C, etc.  That is  
> not my point.]

I think the expression you seek is "comparing virtue among whores."  

Now we can all acknowledge that there is a spectrum in the programmer
time vs machine time trade-off.  (Voice reader users: Please forgive my
ASCII art ... imagine a data set that loosely fits a linear relationship
with a negative slope.)

ASCII art start 

 +
M|*
A|  *  *
C|    *
H|     *         "STUPID"
I|   *     *
N|      *
E|          *
 |             *
C|                 * *
O| "Holy             *
S|  Grail"           *
T|                      *
 0------------------------- +
   PROGRAMMER COST

ASCII art stop

This metric is actually in two dimensions, but we usually consider it in
one dimension with High Machine cost and low programmer cost at one
extreme and low machine cost and high programmer cost at the other
extreme.

ASCII art start

High Machine  <---------------> High Programmer Cost

ASCII art stop

because there is a high inverse correlation between programmer and
machine costs.  Only a fool would use a programing language in the
"stupid" area of the above chart (both costs high).  Likewise, nobody
gets to use the language that does not exist in the "Holy Grail" area of
the chart (both costs low.)

Both Python and Perl are way up in the upper left ( machine cost high,
programmer cost low) of my little chart.   Perl has much magic that
drives up its programmer cost.  Not by much in the know, but by enough
that I would consider it to have a slightly higher programmer cost than
Python.  If Perl code executes a bit faster, then fine, all I can say is
"that's nice."  If machine costs were an issue I'd recode in vhdl and
compile to silicone.

Of the topic I want to address,  you can entirely circumvent those
issues by coding in C and using the Python C-API instead of strcmp and
friends.



> 
> A Good Reason for thinking along these lines (Perl/Python) is more  
> something like speed and reliability of development.  Another one is  
> maintaintability.  I must confess that I know pretty much nothing about  
> Perl, so I can't comment about that.  My opinion about Python is that it  
> is very, very good for these things.
> 
> The problem domains in which I do most of my work (chemical process  
> modelling and simulation) really do require speed.  That's why I mostly  
> use Delphi (i.e. reasonably fast code) at work.   I believe I know when  
> speed is and is not an issue, and (by far) most of the time, my experience  
> is that it is *not*.  So I use Delphi for numerical code and python for  
> everything else.

Why don't you use C for the numerical work?  Then you can do your number
crunching within a c-based python module.  Have your cake and ... 

> 
> You really will have to convince people here that execution speed is a  
> real issue for your programming task (in order to continue this  
> discussion).  Otherwise the debate will go south real quick.

Not only most speed be an issue, but the economics must be such that any
alternative is better than throwing more hardware at the problem.

Adam DePrince 




From quentel.pierre at wanadoo.fr  Sun Feb  6 15:11:55 2005
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Sun, 06 Feb 2005 21:11:55 +0100
Subject: How to read POSTed data
In-Reply-To: <lo2dnRzTVIzByZvfRVn-2Q@rogers.com>
References: <mailman.1980.1107622913.22381.python-list@python.org>
	<4205d419$0$6610$8fcfb975@news.wanadoo.fr>
	<lo2dnRzTVIzByZvfRVn-2Q@rogers.com>
Message-ID: <42067a0d$0$10490$8fcfb975@news.wanadoo.fr>


> Pierre, I am repeating some questions I already stated in another thread, 
> 'CGI POST problem', but do you have any opinions on how CGIHTTPServer's 
> do_POST handles requests?  It looks to me like it always expects form data 
> to be part of the POST command header, in the path of the URL, just like a 
> GET request.  Am I understanding the code incorrectly?  

The code in CGIHTTPServer is not very easy to understand, but it does
read the request body, as many bytes as indicated in the Content-Length
header. See line 262 (in the Python 2.4 distribution) or 250 in Python 
2.3 (this is the Windows version) :

                 data = self.rfile.read(nbytes)

Then this data is sent to the standard input of the CGI script. If this 
script is a Python program using the cgi module, it usually creates a 
cgi.FieldStorage() instance : upon creation, the standard input is read 
(in self.read_urlencoded() for instance) and the string collected is 
processed to produce a dictionary-like object, with keys matching the 
form field names

This is compliant with the CGI specification (HTTP doesn't say anything 
about the management of data sent by POST requests). The code I sent is 
an alternative to CGI, leaving the management of this data (available in 
self.body) to a method of the RequestHandler instance

Regards,
Pierre


From benn at cenix-bioscience.com  Wed Feb  9 05:25:57 2005
From: benn at cenix-bioscience.com (Neil Benn)
Date: Wed, 09 Feb 2005 11:25:57 +0100
Subject: Reportlab and Barcodes
In-Reply-To: <1107894763.331701.26470@c13g2000cwb.googlegroups.com>
References: <1107894763.331701.26470@c13g2000cwb.googlegroups.com>
Message-ID: <4209E535.1010501@cenix-bioscience.com>

Josh wrote:

>Hi All,
>
>I need someone to explain to me how to output a Code39 barcode to a
>Reportlab PDF. As far as I can tell, there is no means to do this with
>the Canvas object, and the demo that is included with the libraries is
>using the platypus Frame to place the barcode on the form. I do not
>wish to use this method. I'm guessing that it needs to be placed on the
>form as some type of graphic. It's obviously not going to work with the
>drawText method. Any ideas? 
>
>Thanks
>
>Josh
>
>  
>
Hello,

          Code39 isn't that complicated a barcode symbology to work 
with.  What you can do is to write some code which can encode a Code39 
barcode from a string into a simple graphic.  I used to have the 
official spec for the barcode but that was in an old job.  You can get 
the official spec from AIM - you'll have to pay for it but it's not 
much.  Although beware about the Narrow:Width ratio if you're gonna try 
and scan the barcode after printing it out - try and get hold of a 
crappy scanner (I got stung by using a good scanner before in the past).

Cheers,

Neil

-- 

Neil Benn
Senior Automation Engineer
Cenix BioScience
BioInnovations Zentrum
Tatzberg 46
D-01307
Dresden
Germany

Tel : +49 (0)351 4173 154
e-mail : benn at cenix-bioscience.com
Cenix Website : http://www.cenix-bioscience.com



From steve at holdenweb.com  Tue Feb  1 08:24:32 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 01 Feb 2005 08:24:32 -0500
Subject: Advice on OSX cocoa app with Python backend
In-Reply-To: <1107242909.3662.10.camel@temp.ant>
References: <1107242909.3662.10.camel@temp.ant>
Message-ID: <41FF8310.7050801@holdenweb.com>

Socheat Sou wrote:

> After a brief, but informative, discussion on Freenode's  #zope
> chatroom, I was advised to consult the gurus on c.l.p.
> 
> I'm working for a small company who is in desperate need to rewrite it's
> 15+ year old, flat-file, client-tracking database.  The staff uses OSX,
> while I administer the couple linux servers we have to run our website
> and some internal sites.  In our initial brainstorming session, we
> decided to go with a Python backend server, handling the database and
> business logic, and a native Cocoa application on the client side, with
> enough glue to make the two stick.
> 
Sounds like a plan, for a Mac house.

> Also, after a bit of research, I discovered Twisted and PB.  I figured
> I'd have to write a customized backend to meet our needs.  However,
> seeing as how 1) I've never written a netwo
> rk application before, let alone a multi-threaded application and 2) I'm
> the sole developer
>  on this project, I was looking for as many API's, modules, frameworks,
> and/or prebuilt solutions as possible to help me out.
> 
First of all, note that Twisted applications needn't be multi-threaded, 
as Twisted makes use of asynchronous interfaces. You *can* write 
multi-threaded code under Twisted, but you don't have to most of the time.

> I initially thought of Zope because I had often heard it referred to as
> an application serv
> er, so I thought it might be something I could use as a basis, write the
> business logic, and have the Cocoa application, with some PyObjC,
> communicate with the Zope server.  We're definately not looking for a
> web-based application, so I wasn't quite sure Zope was what I wa
> nted.
> 
It isn't. Much too heavyweight, with much too steep a learning curve for 
what appears to be essentially a simple project.

> For those that are interested, we're looking at using MySQL as the DBMS.
> From what little I know of OODBMS it doesn't seem like the right choice
> because aside from data entry and client record lookups, the biggest use
> of the database would be to generate reports and tabulated data on an
> arbitrary set of fields.  I've read that this isn't exactly the strength
> of OODBMS?
> 
Who told you that MySQL was OO? It's a bog-standard relational back-end 
with transactional capabilities.

> We are also looking at a server-client architecture, rather than
> individual clients connecting to the database over the network, because
> there are some features the staff would like (such as something similar
> to message passing between each other, and also being able to administer
> connected users).
> 
So you need a(t least one) layer between the database and the client, 
which you plan to write in Python. This makes perfect sense. Almost 
everything you find about writing servers in Python is going to work for 
you, so Google away!

> Does anyone here have any experience building an OSX application with
> Python running the show behind the scenes?  I hope I didn't come off as
> asking "tell me what to do", but rather I would appreciate any advice or
> links to resources that might be helpful in this project.
> 
Mostly, remember that OSX is effectively just another U**x environment, 
so server structures that work under BSD and Linux will tend to work 
under OSX. The unique parts of OSX appear (from the outside) to be 
Carbon/Cocoa and the funky GUI stuff. So have at it and come back for 
advice when you need it. Good luck with your project.

[OBPyCon: of course, if you come to PyCon DC 2005 you can discuss this 
stuff with experts:

   http://www.python.org/pycon/2005/register.html

The numbers tell us this could be the biggest PyCon ever!]

regards
  Steve
-- 
Steve Holden               http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/
Holden Web LLC      +1 703 861 4237  +1 800 494 3119


From steven.bethard at gmail.com  Mon Feb 21 13:39:14 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 21 Feb 2005 11:39:14 -0700
Subject: Test for structure
In-Reply-To: <1108974803.420441.18850@z14g2000cwz.googlegroups.com>
References: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
	<mailman.2824.1108792560.22381.python-list@python.org>
	<1108937287.079367.276910@g14g2000cwa.googlegroups.com>
	<HIqdnYQVyeBCjYTfRVn-oQ@comcast.com>
	<1108974803.420441.18850@z14g2000cwz.googlegroups.com>
Message-ID: <GvKdnbutV6lQt4ffRVn-jA@comcast.com>

 > Steven Bethard wrote:
 >>
 >>Right.  str and unicode objects support iteration through the old
 >>__getitem__ protocol, not the __iter__ protocol.  If you want to use
 >>something as an iterable, just use it and catch the exception:
 >>
 >>try:
 >>     itr = iter(a)
 >>except TypeError:
 >>     # 'a' is not iterable
 >>else:
 >>     # 'a' is iterable

Martin Miller broke the order of reading by top-posting:
> In either case, you can't tell a string and list apart, which is what
> the OP wanted to know, namely how to differentiate the two.

Yes, sorry, I should have marked my post OT.  It was an answer to Terry 
Hancock's post suggesting hasattr(x, '__iter__'), not the OP.

> Perhaps the test for an __iter__ attribute *is* the way to go because
> you can tell the difference between the two type.

I've seen this done before, e.g.:

try:
     itr = iter(x)
except TypeError:
     # is not iterable
else:
     if hasattr(x, '__iter__'):
         # is other iterable
     else:
         # is str or unicode

I don't like this idea much because it depends on str and unicode _not_ 
having a particular function.  I haven't seen any guarantee anywhere 
that str or unicode won't ever grow an __iter__ method.  So this code 
seems dangerous as far as future compatibility goes.

> I think the technique suggested by Robin Munn nearly a year ago (and
> referenced by the link in Simon Brunning's post):
> http://groups-beta.google.com/group/comp.lang.python/msg/c8befd4bed517bbc
> namely:
> 
> try:
>     a + ''
> except TypeError:
>     pass
> else:
>     a= [a]
> 
> would be a good usable solution, although it's not totally infallible.

Yup, if I had to do this kind of type-checking (which I don't think I 
ever do), I'd probably go with something along these lines.

STeVe


From steve at holdenweb.com  Tue Feb  1 08:34:05 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 01 Feb 2005 08:34:05 -0500
Subject: PyCon signature advertising
Message-ID: <lELLd.101987$Jk5.75234@lakeread01>

You will note that I have changed my signature for newsgroups to include 
a plug for PyCon. I would very much appreciate any similar changes that 
c.l.py readers felt able to make to help get the word out that PyCon is 
*the* place to be for Python users and developers.

I appreciate that not everyone has control over their .sig, and that 
some people find advertising of this crassly commercial nature a little 
distasteful. If either of these is the case, please simply ignore this 
message (though you should, of course, still come to PyCon :-)

Every little helps, however, and  I'd like my third (and final) year as 
chairman to see the biggest and (much more importantly) best PyCon ever. 
I hope to meet as many of you as possible in DC, March 23-25 (and during 
the four-day sprint preceding the main event).

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites
Come to PyCon!!!!  http://www.python.org/pycon/2005/
Steve Holden               http://www.holdenweb.com/


From creditwrench at gmail.com  Sat Feb 19 18:31:00 2005
From: creditwrench at gmail.com (Creditwrench)
Date: Sat, 19 Feb 2005 23:31:00 GMT
Subject: Creditwrench
Message-ID: <1108855575.9247da9b927a6b72c38d7d33ddd1a139@teranews>

And the truth shall set ye free

http://www.creditwrench-thetruth.blogspot.com/

Uncle Normie


From enleverlesO.OmcO at OmclaveauO.com  Mon Feb 14 16:01:23 2005
From: enleverlesO.OmcO at OmclaveauO.com (Do Re Mi chel La Si Do)
Date: Mon, 14 Feb 2005 22:01:23 +0100
Subject: DHTML control from Python?
References: <140220051355142173%kenneth.m.mcdonald@sbcglobal.net>
Message-ID: <421111c4$0$6595$8fcfb975@news.wanadoo.fr>

See Pamie :

         http://pamie.sourceforge.net




@-salutations
-- 
Michel Claveau





From FBatista at uniFON.com.ar  Wed Feb 16 12:51:15 2005
From: FBatista at uniFON.com.ar (Batista, Facundo)
Date: Wed, 16 Feb 2005 14:51:15 -0300
Subject: Getting milliseconds in Python
Message-ID: <A128D751272CD411BC9200508BC2194D053C7FB5@escpl.tcp.com.ar>

[Brian Beck]

#- seconds * 100 = milliseconds

Whaaaat?

It really is

  seconds = 1000 * milliseconds


.    Facundo

Bit?cora De Vuelo: http://www.taniquetil.com.ar/plog
PyAr - Python Argentina: http://pyar.decode.com.ar/


  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
ADVERTENCIA.

La informaci?n contenida en este mensaje y cualquier archivo anexo al mismo,
son para uso exclusivo del destinatario y pueden contener informaci?n
confidencial o propietaria, cuya divulgaci?n es sancionada por la ley.
Si Ud. No es uno de los destinatarios consignados o la persona responsable
de hacer llegar este mensaje a los destinatarios consignados, no est?
autorizado a divulgar, copiar, distribuir o retener informaci?n (o parte de
ella) contenida en este mensaje. Por favor notif?quenos respondiendo al
remitente, borre el mensaje original y borre las copias (impresas o grabadas
en cualquier medio magn?tico) que pueda haber realizado del mismo.
Todas las opiniones contenidas en este mail son propias del autor del
mensaje y no necesariamente coinciden con las de Telef?nica Comunicaciones
Personales S.A. o alguna empresa asociada.
Los mensajes electr?nicos pueden ser alterados, motivo por el cual
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From timr at probo.com  Sun Feb 13 03:34:03 2005
From: timr at probo.com (Tim Roberts)
Date: Sun, 13 Feb 2005 00:34:03 -0800
Subject: Considering python - have a few questions.
References: <eZAPd.21496$Ka6.148459@news1.mts.net>
Message-ID: <m04u011nhb1uvkhtctu37o4ug0j8efuebh@4ax.com>

"Heather Stovold" <h_stovold at hotmail.com> wrote:
>
>I need to make a GUI interface.  Some of the screens need to be dynamically
>created, with the screen information in a database. Included in the database
>will be pictures (.gif or .jpg) that need to be displayed.  A second
>database would hold the user's data.   I would also need to be able to print
>reports made in a similar fashion.
>
>I would want the program to run in Windows for sure.  If it could work on a
>Mac and other systems, that would be a plus.  I would really love it to be
>able to also be able to be run on the internet (allowing more than one
>person access to the data), but I've never done anything other than basic
>web pages with a web page editor (dreamweaver.)
>
>btw - I have the database designed (and the program info database filled) in
>Access....
>
>I don't mind working hard to learn how to do it....   I just want to know if
>Python is a good choice or not!

Python is a great choice.  Personally, given your requirements, I would
make this a web application.  In my opinion, HTML is the easiest way to
generate a user interface on-the-fly.  With a package like CherryPy, you
get a web server built-in.  You fire up the server in the background, and
bring up Internet Explorer as "your" user interface.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From jerf at jerf.org  Wed Feb  2 16:33:05 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Wed, 02 Feb 2005 16:33:05 -0500
Subject: Generating modul classes with eval
References: <mailman.1772.1107377411.22381.python-list@python.org>
	<pan.2005.02.02.21.20.40.542069@jerf.org>
Message-ID: <pan.2005.02.02.21.33.05.849015@jerf.org>

On Wed, 02 Feb 2005 16:20:41 -0500, Jeremy Bowers wrote:
> That said, "__main__" indicates you ran it in the interactive shell.

Or ran it directly on the command line. Duh. I thought that clause really
loudly, but I guess I never actually typed it.


From luke at tatooine.planet  Mon Feb  7 10:42:12 2005
From: luke at tatooine.planet (Luke Skywalker)
Date: Mon, 07 Feb 2005 16:42:12 +0100
Subject: WYSIWYG wxPython "IDE"....?
References: <1107560658.584623.303310@o13g2000cwo.googlegroups.com>
	<4205fcd9@news.highway1.com.au>
	<1107751731.066796.295170@g14g2000cwa.googlegroups.com>
	<cu7hcf$1ek$1@online.de>
	<47pe019efj34ua4o5pjjarlv3i85pa9048@4ax.com>
	<42077A42.6D22@zeusedit.com>
Message-ID: <613f0158aqibks8kvnptbmq3hum6hgs6f1@4ax.com>

On Tue, 08 Feb 2005 01:25:06 +1100, Jussi Jumppanen
<jussij at zeusedit.com> wrote:
>> To me, the very fact that the only solution if you don't want 
>> to carry a multi-megabyte widget set with you (either wxWidgets 
>> or QT is to go the MFC way (which a lot of C developers seem 
>> to hate) through
>
>Have you ever tried to use MFC in anything other than a 
>simple application? 

... which is why I said that the alternative of using PyWin32 didn't
sound like a lot of fun :-)

Luke.


From t-meyer at ihug.co.nz  Thu Feb  3 17:26:41 2005
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Fri, 4 Feb 2005 11:26:41 +1300
Subject: Where are list methods documented?
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E801F9892A@its-xchg4.massey.ac.nz>
Message-ID: <ECBA357DDED63B4995F5C1F5CBE5B1E801DAFE19@its-xchg4.massey.ac.nz>

> You're not the only one with a hard time finding the list
> documentation. It's even crazier for string docs.
> 
> If you want to see how to strip strings in Python you have to go to
> the library docs, then click "sequence types" (betcha don't think of
> strings as sequences), then scroll to the bottom, then click "String
> Methods", then scroll to find "strip()".

Does nobody use an index anymore?  If you type "strip" into the index of the
Windows HTML help, the first entry is "strip (string method)", which is
probably what you want.  Or you can use the pyhelp.cgi script linked from
<http://python.org/doc> and search for "strip" and "strip (string method)"
is the second entry (the first, which is strip in the string module, would
tell you more-or-less the same, anyway).

<http://starship.python.net/crew/theller/pyhelp.cgi?keyword=strip&version=cu
rrent>

Or you can go to the general index in the regular version of the HTML help.
As you might expect, "strip" can be found under "s".

<http://docs.python.org/lib/genindex.html#letter-s>

I presume that there's some sort of index in the PDF and all the other
versions of the help, too.

=Tony.Meyer



From fredrik at pythonware.com  Mon Feb 14 17:35:54 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 23:35:54 +0100
Subject: tk resource file for geometry?
References: <5175a81c05021213322597c0d9@mail.gmail.com>
Message-ID: <cur8v8$2ji$1@sea.gmane.org>

Gabriel B. wrote:

> i'm using almost every widget property from my pyTk programs in the
> form of resources, like:
>  self.tk.option_add ( "*InputClass*background", "White" )
>
> In the widget creation i have only the Class and the Command
> attribute, but i'm having to add some tk options to the geometry
> method, in the case, pack. Is there a way to overcome this?
>
> For example, every single Frame i pack i use
>  self.pack(fill='both', expand=1)
> I'd love to have something like:
>  self.tk.option_add ( "*Frame*fill", 'both' )
>  self.tk.option_add ( "*Frame*expand", 'yes' )
>
> Is there anything like it?

not that I'm aware of, but I might be missing something.  you might wish
to repost your question to the tkinter discuss mailing list:

    http://mail.python.org/mailman/listinfo/tkinter-discuss
    http://dir.gmane.org/gmane.comp.python.tkinter

</F> 





From invalidemail at aerojockey.com  Mon Feb 14 05:17:32 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 14 Feb 2005 02:17:32 -0800
Subject: custom classes in sets
References: <mailman.2510.1108363259.22381.python-list@python.org>
	<EYOdnUHqx-UVzY3fRVn-og@comcast.com>
	<mailman.2515.1108368882.22381.python-list@python.org>
Message-ID: <1108376252.565131.237330@o13g2000cwo.googlegroups.com>

vegetax wrote:
> Steven Bethard wrote:
>
> > vegetax wrote:
> >> How can i make my custom class an element of a set?
> >>
> >> class Cfile:
> >>   def __init__(s,path): s.path = path
> >>
> >>   def __eq__(s,other):
> >>    print 'inside equals'
> >>    return not os.popen('cmp %s %s' % (s.path,other.path)).read()
> >>
> >>   def __hashcode__(s): return s.path.__hashcode__()
> >>
> >> the idea is that it accepts file paths and construct a set of
unique
> >> files (the command "cmp" compares files byte by byte.),the files
can
> >> have different paths but the same content
> >>
> >> but the method __eq__ is never called

[snip]

> I just tried and it wont be called =(, so how can i generate a hash
code for
> the CFile class? note that the comparitions(__eq__) are done based on
the
> contents of a file using the command 'cmp', i guess thats not posible
but
> thanks.


Let me suggest that, if your idea is to get a set of files all with
unique file contents, comparing a file byte-by-byte with each file
already in the set is going to be absurdly inefficient.

Instead, I recommend comparing md5 (or sha) digest.  The idea is, you
read in each file once, calculate an md5 digest, and compare the
digests instead of the file contents.

. import md5
.
. class Cfile:
.     def __init__(self,path):
.         self.path = path
.         self.md5 = md5.new().update(open(path).read()).digest()
.     def __eq__(self,other):
.         return self.md5 == other.md5
.     def __hash__(self):
.         return hash(self.md5)

This is kind of hackish (not to mention untested).  You would probably
do better to mmap the file (see the mmap module) rather than read it.

And, in case you're wondering: yes it is theoretically possible for
different files to have the same md5.  However, the chances are
microscopic.  (Incidentally, the SCons build system uses MD5 to decide
if a file has been modified.)


-- 
CARL BANKS



From steve at holdenweb.com  Wed Feb  2 07:36:29 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 02 Feb 2005 07:36:29 -0500
Subject: Next step after pychecker
In-Reply-To: <mailman.1726.1107313882.22381.python-list@python.org>
References: <41ff0308$0$6503$636a15ce@news.free.fr>	<cto5b9$hpi$1@swifty.westend.com>
	<369mivF4ubv6mU1@individual.net>	<200502012113.26393.francis.girard@free.fr>
	<mailman.1726.1107313882.22381.python-list@python.org>
Message-ID: <nU3Md.102583$Jk5.36689@lakeread01>

Skip Montanaro wrote:

>     Francis> "Every well-formed expression of the language can be assigned a
>     Francis> type that can be deduced from the constituents of the
>     Francis> expression alone." Bird and Wadler, Introduction to Functional
>     Francis> Programming, 1988
> 
>     Francis> This is certainly not the case for Python since one and the
>     Francis> same variable can have different types depending upon the
>     Francis> execution context. Example :
> 
>     Francis> 1- if a is None:
>     Francis> 2-   b = 1
>     Francis> 3- else:
>     Francis> 4-   b = "Phew"
>     Francis> 5- b = b + 1
> 
>     Francis> One cannot statically determine the type of b by examining the
>     Francis> line 5- alone.
> 
> Do you have an example using a correct code fragment?  It makes no sense to
> infer types in code that would clearly raise runtime errors:
> 
>     >>> "Phew" + 1
>     Traceback (most recent call last):
>       File "<stdin>", line 1, in ?
>     TypeError: cannot concatenate 'str' and 'int' objects
> 
> Also, note that the type assigned to an expression may be nothing more than
> "object".  Clearly that wouldn't be very helpful when trying to write an
> optimizing compiler, but it is a valid type.
> 
> Skip

So reaplce the plus sign with an asterisk ...

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005          http://www.python.org/pycon/2005/
Steve Holden                           http://www.holdenweb.com/


From idadesub at gmail.com  Thu Feb  3 16:03:07 2005
From: idadesub at gmail.com (Erick)
Date: 3 Feb 2005 13:03:07 -0800
Subject: streaming a file object through re.finditer
In-Reply-To: <SJmdndZykYrzNZzfRVn-hA@comcast.com>
References: <1107396145.400036.271010@g14g2000cwa.googlegroups.com>
	<SJmdndZykYrzNZzfRVn-hA@comcast.com>
Message-ID: <1107464587.484924.143160@l41g2000cwc.googlegroups.com>

I did try to see if I could get that to work, but I couldn't figure it
out. I'll see if I can play around more with that api.

So say I did investigate a little more to see how much work it would
take to adapt the re module to accept an iterator (while leaving the
current string api as another code path). Depending on how complicated
a change this would be, how much interest would there be in other
people using this feature? From what I understand about regular
expressions, they're essentially stream processing and don't need
backtracking, so reading from an interator should work too (right?).

Thanks,

-e



From bedouglas at earthlink.net  Fri Feb 25 19:10:45 2005
From: bedouglas at earthlink.net (bruce)
Date: Fri, 25 Feb 2005 16:10:45 -0800
Subject: possible python/linux/gnome issue!!
Message-ID: <014f01c51b97$9eff4bb0$0301a8c0@Mesa.com>

hi...

i'm running rh8.0 with gnome.. i'm not sure of the version (it's whatever rh
shipped).

i've recently updated (or tried to update) python to the latest version.
when i try to run the 'Server Settings/Services' Icon within gnome, nothing
happens...

i tried to run the 'start services' command from a command line, and got the
following...

it appears to be a conflict somewhere...

--------------------------------------------------------
[root at lserver2 bin]# redhat-config-services
/usr/share/redhat-config-services/serviceconf.py:331: SyntaxWarning:
argument named None
  def on_mnuRescan_activate(self,None):
/usr/share/redhat-config-services/serviceconf.py:342: SyntaxWarning:
argument named None
  def on_optRL3_activate(self, None):
/usr/share/redhat-config-services/serviceconf.py:351: SyntaxWarning:
argument named None
  def on_optRL4_activate(self, None):
/usr/share/redhat-config-services/serviceconf.py:375: SyntaxWarning:
argument named None
  def on_optRL5_activate(self, None):
/usr/share/redhat-config-services/serviceconf.py:409: SyntaxWarning:
argument named None
  def on_selectCursor(self,None):
/usr/share/redhat-config-services/serviceconf.py:419: SyntaxWarning:
argument named None
  def on_btnSave_clicked(self, None):
/usr/share/redhat-config-services/serviceconf.py:435: SyntaxWarning:
argument named None
  def on_btnRevert_clicked(self, None):
/usr/share/redhat-config-services/serviceconf.py:456: SyntaxWarning:
argument named None
  def on_btnStart_clicked(self,None):
/usr/share/redhat-config-services/serviceconf.py:462: SyntaxWarning:
argument named None
  def on_btnStop_clicked(self,None):
/usr/share/redhat-config-services/serviceconf.py:468: SyntaxWarning:
argument named None
  def on_btnRestart_clicked(self,None):
Traceback (most recent call last):
  File "/usr/share/redhat-config-services/serviceconf.py", line 24, in ?
    import gtk
ImportError: No module named gtk
[root at lserver2 bin]#

---------------------------------------------------------

can someone perhaps suggest a solution, or point me to where i might find a
solution to this issue. could the python changes be causing a problem? would
upgrading gnome potentially fix the issue? can you upgrade gnome without
upgrading the rh kernel?

i'm posting here, because it might be a python related issue, in that i
might have to upgrade other apps to match the new version of python. any
ideas/thoughts/etc.. would be appreciated...

this is rather frustrating...

thanks

-bruce
bedouglas at earthlink.net




From tom at dtsam.com  Tue Feb  1 12:50:30 2005
From: tom at dtsam.com (Thomas Bartkus)
Date: Tue, 1 Feb 2005 11:50:30 -0600
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<uImdnUAKxbKaFWPcRVn-2A@telcove.net>
	<1107205410.367521.50490@f14g2000cwb.googlegroups.com>
	<44SdnUZGopnrAWLcRVn-pg@telcove.net>
	<41FFAE20.7030802@holdenweb.com>
Message-ID: <E5mdnWoOkv2mXGLcRVn-gw@telcove.net>

"Steve Holden" <steve at holdenweb.com> wrote in message
news:41FFAE20.7030802 at holdenweb.com...
> Thomas Bartkus wrote:
>
> > "Carl Banks" <invalidemail at aerojockey.com> wrote in message
> > news:1107205410.367521.50490 at f14g2000cwb.googlegroups.com...
> > <snip>
> >
> >>How common is it for a local variable to be bound in
> >>more than one place within a function?
> >
> >
> > How common?  It shouldn't happen at all and that was the point.
>
> This seems a little excessive to me. Sample use case:
>
> for something in lst:
>    if type(something) != type(()):
>      something = tuple(something)

Hhhmmh!
I presume you are going through the list and want to gaurantee that every
item you encounter is a tuple!  So if it ain't - you just re-declare
"something" to be a tuple. What was formerly a single string, integer,
whathaveyou is now a tuple *containing* a single string, integer,
whathaveyou.

Do you do it that way because you can? Or  because you must?
   And
If the former - is it a good idea?
OR did I just miss your codes intent completely?

My first inclination would be to create a new variable (type = tuple) and
accept (or typecast) each "something" into it as required. The notion that
you just morph "something" still seems rather abhorrent. It hadn't occurred
to me that iterating through a list like that means the iterater "something"
might need to constantly morph into a different type according to a lists
possibly eclectic contents.

It might explain why the interpreter is incapable of enforcing a type.  It
would forbid iterating through lists containing a mix of different types.
EXCEPT- I must note, that other languages manage to pull off exactly such a
trick with a variant type. When you need to pull off a feat such as this,
you declare a variant type where the rules are relaxed *for that situation
only* and there is no need to toss the baby out with the bathwater.

Thomas Bartkus




From amichail at gmail.com  Tue Feb 22 04:46:52 2005
From: amichail at gmail.com (Amir  Michail)
Date: 22 Feb 2005 01:46:52 -0800
Subject: Open Course on Software System Design and Implementation
Message-ID: <1109065612.062177.52610@f14g2000cwb.googlegroups.com>

Hi,

I will be teaching a course on software system design and
implementation.

Like last year, the course will be open meaning that anyone can
participate in online discussions -- not only UNSW students.

You can find a mind map of topics covered last year here:

http://cs3141.web.cse.unsw.edu.au/mindmap.html (Java required)

There is a significant python component.

Feel free to register and participate in the online discussions.

http://cs3141.web.cse.unsw.edu.au

Amir



From eric_brunel at despammed.com  Mon Feb 28 06:27:28 2005
From: eric_brunel at despammed.com (Eric Brunel)
Date: Mon, 28 Feb 2005 12:27:28 +0100
Subject: Polling selections from a listbox (Tkinter)
References: <1109418496.454931.302810@z14g2000cwz.googlegroups.com>
Message-ID: <opsmwnf22frqur0o@eb.pragmadev>

On 26 Feb 2005 03:48:16 -0800, Harlin Seritt <harlinseritt at yahoo.com> wrote:
[snip]
> Obviously when this starts up this is going to show selection #0 inside
> the label box. How do I make sure that whatever is arbitrarily selected
> ends up in the label box as this gui runs? I tried doing a bind:
>
> self.listbox.bind("<Button-1>", self.changelabel)
>
> This did not work as intended as the changelabel's text option only
> showed what the selection index was BEFORE the event took place.

Bind on <ButtonRelease-1>; <Button-1> is a synonym for <ButtonPress-1>, and when the button is pressed, the selection is not done yet.

HTH
-- 
python -c 'print "".join([chr(154 - ord(c)) for c in "U(17zX(%,5.z^5(17l8(%,5.Z*(93-965$l7+-"])'


From deetsNOSPAM at web.de  Sun Feb 13 14:01:54 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sun, 13 Feb 2005 20:01:54 +0100
Subject: Second posting - Howto connect to MsSQL
References: <iyMPd.4612$ZZ.1645@newssvr23.news.prodigy.net>
Message-ID: <cuo86t$shj$04$1@news.t-online.com>

John Fabiani wrote:

> Hi,
> Since this is (sort of) my second request it must not be an easy solution.
> Are there others using Python to connect MsSQL?  At the moment I'd accept
> even a windows solution - although, I'm looking for a Linux solution.


Use unix-odbc and a mssql driver for unxi-odbc. Its called ftl or tls or
something. As always: Google is your friend...
-- 
Regards,

Diez B. Roggisch


From gmane-schpam at joefrancia.com  Wed Feb 16 15:40:31 2005
From: gmane-schpam at joefrancia.com (Joe Francia)
Date: Wed, 16 Feb 2005 15:40:31 -0500
Subject: How can I Fill in web form and post back
References: <LJtQd.2010133$B07.305765@news.easynews.com>
	<mailman.2655.1108504446.22381.python-list@python.org>
	<3QMQd.2109818$B07.322065@news.easynews.com>
Message-ID: <opsma41tzgpvslz3@scaba>

On Wed, 16 Feb 2005 19:05:35 GMT, Rigga <rigga at hasnomail.com> wrote:

> Joe Francia wrote:
>
>> Rigga wrote:
>>> Hi,
>>>
>>> I am looking for the best way to use Python to get a web page, look for
>>> some particular fields on a form, fill in the fields and submit the  
>>> form
>>> but I have no idea where to start - any pointers appreciated
>>>
>>> many thanks
>>>
>>> Rigga
>>
>> Here's a pretty good resource:
>> http://www.google.com/search?q=python+fill+web+forms
>>
> Thanks but I already checked there and didnt come up with much

Really?  The second link is for ClientForm, the description of which reads:

"ClientForm is a Python module for handling HTML forms on the client side,  
useful for parsing HTML forms, filling them in and returning the completed  
forms to the server."

That seems to exactly fulfil your requirements.  Are you sure you really  
looked?

-- 
Soraia: http://www.soraia.com/



From ilias at lazaridis.com  Mon Feb 14 05:33:16 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Mon, 14 Feb 2005 12:33:16 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cupstp$an7$2@ctb-nnrp2.saix.net>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
Message-ID: <cupupa$kfs$2@usenet.otenet.gr>

David Fraser wrote:
> Ilias Lazaridis wrote:
[...]
> Just to add to all the other answers:
> 
> Don't just complain, submit patches and work at keeping them maintained. 
> If this is done for a while it may be more of an argument for having 
> them included

I do not "just complain".

I've spend already hours with writing down the questionaire [which you 
have successfully ignored].

.

-- 
http://lazaridis.com


From jzgoda at gazeta.usun.pl  Fri Feb 18 15:13:11 2005
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Fri, 18 Feb 2005 21:13:11 +0100
Subject: unicode encoding usablilty problem
In-Reply-To: <mailman.2811.1108751132.22381.python-list@python.org>
References: <opsmekm2ei6yt6e7@news.cisco.com>
	<mailman.2811.1108751132.22381.python-list@python.org>
Message-ID: <cv5ihb$eq8$1@nemesis.news.tpi.pl>

Fredrik Lundh napisa?(a):

>>This brings up another issue. Most references and books focus exclusive on  entering unicode 
>>literal and using the encode/decode methods. The fallacy  is that string is such a basic data type 
>>use throughout the program, you  really don't want to make a individual decision everytime when 
>>you use  string (and take a penalty for any negligence). The Java has a much more  usable model 
>>with unicode used internally and encoding/decoding decision  only need twice when dealing with 
>>input and output.
> 
> that's how you should do things in Python too, of course.  a unicode string
> uses unicode internally. decode on the way in, encode on the way out, and
> things just work.

There are implementations of Python where it isn't so easy, Python for 
iSeries (http://www.iseriespython.com/) is one of them. The code written 
for "normal" platform doesn't work on AS/400, even if all strings used 
internally are unicode objects, also unicode literals don't work as 
expected.

Of course, this is implementation fault but this makes a headache if you 
need to write portable code.

-- 
Jarek Zgoda
http://jpa.berlios.de/ | http://www.zgodowie.org/


From bjourne at gmail.com  Sat Feb  5 13:49:48 2005
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Sat, 5 Feb 2005 19:49:48 +0100
Subject: Alternative to standard C "for"
In-Reply-To: <1107628331.816935.16760@o13g2000cwo.googlegroups.com>
References: <1107628331.816935.16760@o13g2000cwo.googlegroups.com>
Message-ID: <740c3aec050205104924a82d23@mail.gmail.com>

> I am quite new to Python, and have a straight & simple question.
> In C, there is for (init; cond; advance). We all know that.
> In Python there are two ways to loop over i=A..B (numerical.):
> 1) i = A
>    while i<B:
>       ...do something...
>       i+=STEP

This is indeed quite ugly. You rarely need such loops in Python and
with some thinking you can often translate the C-equivalent to
something more pythonic. As you guessed, your second problem is best
solved with a generator function - xrange(). It is completely equal to
range() except that it returns a generator instead of a list.


-- 
mvh Bj?rn


From simoninusa2001 at yahoo.co.uk  Fri Feb 11 15:04:33 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 11 Feb 2005 12:04:33 -0800
Subject: Multi-Platform installer generator
In-Reply-To: <mailman.2376.1108120460.22381.python-list@python.org>
References: <mailman.2376.1108120460.22381.python-list@python.org>
Message-ID: <1108152273.114309.92060@o13g2000cwo.googlegroups.com>

if you're referring to the installshield x/mp products, forget it, they
are really bad.

the last company i worked for who used x/mp actually went back to shell
scripts for unix and installshield pro for windows, as the java thing
was abismall, and even the ide was written in java, so horribly slow.

personally i'd stick with shell scripts for unix, and innosetup for
windows.



From kdahlhaus at yahoo.com  Fri Feb 18 10:15:05 2005
From: kdahlhaus at yahoo.com (kdahlhaus at yahoo.com)
Date: 18 Feb 2005 07:15:05 -0800
Subject: Chart Director?
Message-ID: <1108739705.870161.36050@z14g2000cwz.googlegroups.com>

Does anyone here have experience with Chart Director
(http://www.advsofteng.com/index.html)?   I'm thinking about purchasing
it and looking for any feedback from the Python community.  Thanks



From jdhunter at ace.bsd.uchicago.edu  Thu Feb  3 21:59:14 2005
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Thu, 03 Feb 2005 20:59:14 -0600
Subject: [Fwd: [gnu.org #220719] Re: python and gpl]
In-Reply-To: <7x3bwdkpbe.fsf@ruckus.brouhaha.com> (Paul Rubin's message of
	"03 Feb 2005 18:54:13 -0800")
References: <mailman.1861.1107484943.22381.python-list@python.org>
	<7x3bwdkpbe.fsf@ruckus.brouhaha.com>
Message-ID: <m3vf99t4hp.fsf@peds-pc311.bsd.uchicago.edu>

>>>>> "Paul" == Paul Rubin <"http://phr.cx"@NOSPAM.invalid> writes:

    Paul> Various possible candidates for such dragging have
    Paul> apparently decided that their chances weren't too good.

Or simply that it wasn't worth the cost to go to court, even if they
presumed they would eventually win.

JDH


From aisomurs at paju.oulu.fi  Sat Feb 12 12:15:26 2005
From: aisomurs at paju.oulu.fi (Antti Isomursu)
Date: 12 Feb 2005 09:15:26 -0800
Subject: Newbie needs help with canvas.create_image !
Message-ID: <b5f9523.0502120915.1a93d23@posting.google.com>

Ok, this is my problem:
With code below I get a red box with given width and height. When I
use that create_image, nothing happens. I only see that same red box.
Why is that?
The loop.bmp is working fine when I use show() method.

        win = Toplevel() 

        canvas = Canvas(win, width=100, height=100, background='red')
        canvas.pack()

        im = Image.open("loop.bmp")
        photo = ImageTk.PhotoImage(im)
     
        canvas.create_image(8, 8, anchor="nw", image=photo)
   
(Interestingly loop.bmp appears to the red box if I try to pack that
canvas.create_image ( canvas.create_image.pack()) and ofcourse I also
get an error message that It can't be done. But anyway the picture
appears ...weird)


From steven.bethard at gmail.com  Mon Feb 21 23:37:07 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 21 Feb 2005 21:37:07 -0700
Subject: NOOB coding help....
In-Reply-To: <69012ed09e48920e1e80e311bca1659c@localhost.talkaboutprogramming.com>
References: <69012ed09e48920e1e80e311bca1659c@localhost.talkaboutprogramming.com>
Message-ID: <sKGdnSm3e5NyK4ffRVn-2g@comcast.com>

Igorati wrote:
> list = [ ] 
> a = 1 
> print 'Enter numbers to add to the list. (Enter 0 to quit.)'
> while a != 0 :
>     a = input('Number? ')
>     list.append(a)
> zero = list.index(0)
> del list[zero]
> list.sort() 

A simpler approach is to use the second form of the builtin iter 
function which takes a callable and a sentinel:

py> def getint():
...     return int(raw_input('Number? '))
...
py> numbers = sorted(iter(getint, 0))
Number? 3
Number? 7
Number? 5
Number? 2
Number? 0
py> numbers
[2, 3, 5, 7]

Note that I've renamed 'list' to 'numbers' so as not to hide the builtin 
type 'list'.

> variableMean = lambda x:sum(x)/len(x)
> variableMedian =  lambda x: x.sort() or x[len(x)//2]
> variableMode = lambda x: max([(x.count(y),y) for y in x])[1]
> s = variableMean(list)
> y = variableMedian(list)
> t = variableMode (list)

See "Inappropriate use of Lambda" in 
http://www.python.org/moin/DubiousPython.

Lambdas aside, some alternate possibilities for these are:

def variable_median(x):
     # don't modify original list
     return sorted(x)[len(x)//2]
def variable_mode(x):
     # only iterate through x once (instead of len(x) times)
     counts = {}
     for item in x:
         counts[x] = counts.get(x, 0) + 1
     # in Python 2.5 you'll be able to do
     # return max(counts, key=counts.__getitem__)
     return sorted(counts, key=counts.__getitem__, reverse=True)[0]

Note also that you probably want 'from __future__ import divsion' at the 
top of your file or variableMean will sometimes give you an int, not a 
float.

> x = (s,y,t)
> inp = open ("Wade_StoddardSLP3-2.py", "r")
> outp = open ("avg.py", "w")
> f = ("avg.py")
> for x in inp:
>     outp.write(x)
> import pickle
> pickle.dump(x, f)

If you want to save s, y and t to a file, you probably want to do 
something like:

     pickle.dump((s, y, t), file('avg.pickle', 'w'))

I don't know why you've opened Wade_StoddardSLP3-2.py, or why you write 
that to avg.py, but pickle.dump takes a file object as the second 
parameter, and you're passing it a string object, "avg.py".

>     f = open("avg.py","r")
>     avg.py = f.read()
>     print 'The Mean average is:', mean
>     print 'The Median is:', meadian
>     print 'The Mode is:', mode

     mean, median, mode = pickle.load(file('avg.pickle'))
     print 'The Mean average is:', mean
     print 'The Median is:', meadian
     print 'The Mode is:', mode

HTH,

STeVe


From deetsNOSPAM at web.de  Tue Feb 15 06:43:29 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Tue, 15 Feb 2005 12:43:29 +0100
Subject: Accessing Objects Based On Their ID
References: <uc39e2-63h1.ln1@eskimo.tundraware.com>
Message-ID: <37e5ioF5brmq1U1@individual.net>


> Given the ID of an object, is there a way to access it?  For example,
> if we have the ID of a class instance, is there a way to invoke its
> methods and attributes knowning only that ID?  Similarly, if we have the
> ID of a function, is there a way to call it?

No. 

> This comes up because of an implementation I had in mind wherein I
> would store the IDs of a notionally linked-list of objects - but without
> the link - I just want to store their IDs in the desired order.  But
> later, when I want to actually use the objects I need a way to get from ID
> back to something accessible in the namespace...

Why only the id? A list only stores a reference to the object anyway - no
copy of it. So you don't gain anything by using the id.
-- 
Regards,

Diez B. Roggisch


From pinard at iro.umontreal.ca  Sun Feb 20 09:22:46 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Sun, 20 Feb 2005 09:22:46 -0500
Subject: [ANN] Python 2.4 Quick Reference available
In-Reply-To: <421898CD.6040408@iinet.net.au>
References: <cv79sj$mgk$1@aphrodite.grec.isp.9tel.net>
	<1108831318.290846.5930@z14g2000cwz.googlegroups.com>
	<qnkll9kv09y.fsf@arbutus.physics.mcmaster.ca>
	<37qaleF5gd7bcU1@individual.net> <421898CD.6040408@iinet.net.au>
Message-ID: <20050220142246.GA17000@phenix.progiciels-bpi.ca>

[Nick Coghlan]

> George Sakkis wrote:
>
> >Still the word "open" sounds too general if the meaning is "open
> >a file-like object"; OTOH this could be a good thing if in some
> >future version "open('http://www.python.org')" was e.g. an alias to
> >urllib2.urlopen.

> Exactly the reason the BDFL gave for preferring 'open' - it may be extended 
> to opening other types of objects than files.

So, when we *know* we are opening a file, `file' cannot be a bad choice! :-)
Moreover, practically, most of the times, we know we are opening a file.

`open' is opened (sic!) for some future magic.  I prefer to protect my
programs against future magic, until this magic is precisely specified.

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From peter at somewhere.com  Fri Feb 18 02:29:45 2005
From: peter at somewhere.com (Peter Maas)
Date: Fri, 18 Feb 2005 08:29:45 +0100
Subject: [EVALUATION] - E02 - ULTIMATE RECIPE TO RESOLVE ALL ISSUES
In-Reply-To: <mailman.2714.1108579989.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr> <cuv1st$6um$1@swifty.westend.com>
	<mailman.2714.1108579989.22381.python-list@python.org>
Message-ID: <cv49qp$h7f$1@swifty.westend.com>

Terry Reedy schrieb:
> "Peter Maas" <peter at somewhere.com> wrote in message 
> news:cuv1st$6um$1 at swifty.westend.com...
> 
>>http://nobelprize.org/medicine/educational/pavlov/
>>
>>and then do something useful :)
> 
> 
> Thanks.  I showed this to my daughter, who enjoyed the game, and explained 
> your point re Pavlov posting, and about Pavlov advertising, etc. 

Fine that at least one person benefitted from my post :) I came across
this when I browsed through the Lazaridis thread which was - if for
nothing else - good for some laughs.

But at the same time I felt uncomfortable to see how many bright
Pythoneers cared to give well thought, helpful and friendly answers
to somebody who was acting unpolite and kind of stupid, even mechanical.
This newsgroup is used to be helpful to newbies and Lazaridis was
ringing the newbie bell.

Perhaps we will soon see a triumphant publication with the title
"Ilias Lazaridis - the ELIZA of the 21st century. A milestone towards
the perfect Turing test" ;)

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From dontwant at spam.com  Sat Feb 12 21:53:32 2005
From: dontwant at spam.com (Courageous)
Date: Sat, 12 Feb 2005 18:53:32 -0800
Subject: Kill GIL (was Re: multi threading in multi processor (computer))
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<1107964587.818199.223980@g14g2000cwa.googlegroups.com>
	<mailman.2254.1107966236.22381.python-list@python.org>
	<7xr7jlwieq.fsf@ruckus.brouhaha.com>
	<cum62t$3fb$1@panix2.panix.com>
	<mailman.2463.1108256227.22381.python-list@python.org>
Message-ID: <j4gt01dbj4oh7fctllsn6mv7f7ddbo3st6@4ax.com>


>Killing the GIL is proposing a silver bullet where there is no werewolf-ly,

About the only reason for killing the GIL is /us/. We, purists,
pythonistas, language nuts, or what not, who for some reason or
other simply hate the idea of the GIL. I'd view it as an artistic
desire, unurgent, something to plan for the future canvas upon
which our painting is painted...

C//



From Serge.Orlov at gmail.com  Tue Feb 15 00:59:01 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: Tue, 15 Feb 2005 05:59:01 +0000 (UTC)
Subject: os.rename() doesn't work w/unicode??
References: <UtfQd.58964$L_3.26017@clgrps13>
Message-ID: <cus335$2p0$1@news.comcor-tv.ru>

fanbanlo wrote:
> C:\MP3\001.txt -> 0.txt
> C:\MP3\01. ??? - ????(???).mp3 -> 1.mp3
>
> Traceback (most recent call last):
>   File
> "C:\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
> line 310, in RunScript
>     exec codeObject in __main__.__dict__
>   File "C:\MP3\!RenameNum.py", line 40, in ?
>     renameFiles(os.path.dirname(sys.argv[0]))
>   File "C:\MP3\!RenameNum.py", line 26, in renameFiles
>     os.rename(os.path.join(path, filenames), new_filename)
> OSError: [Errno 22] Invalid argument

os.rename works with unicode, you're getting this error because
question marks are not allowed in file names on Windows.

  Serge.




From ilias at lazaridis.com  Mon Feb 14 07:23:08 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Mon, 14 Feb 2005 14:23:08 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
Message-ID: <cuq57b$j83$1@usenet.otenet.gr>

Brian Beck wrote:
> Ilias Lazaridis wrote:
>> this answer do not fit in most questions.
>> 
>> please review them again.
> 
> Actually, it does. Please review them again.
> 
>> My questions:
>> 
>> a) Why does the Python Foundation not provide additionally a binary
>>  version, compiled with MinGW or another open-source compiler?
> 
> Because no one has yet volunteered their time and effort to get the
> job done.
[...]

thank you for placing the answers in context.

>> I ask some questions and suggest some things.
>> 
>> Voluntarlily and without beeing paid.
> 
> What a martyr you are.

like all the open-source folks?

>> There are many commercial systems around python.
>> 
>> So please stop this volunteerism-stuff.
> 
> If the support you're looking for is beneficial to your commercial 
> application a.k.a. business, then why aren't you making it happen? 

I am in the process of doing so.

First I have to analyze the status-quo.

Which is not very simple with such a community.

> Obviously the existing commercial development teams are doing fine 
> without it, otherwise it would exist. Even then, a commercial
> developer providing their development work to enhance the standard
> Python distribution IS volunteering.

One of the most funny things within open-source is that switching:

first:
"we have powerfull solutions which beat this and that"

then:
"hey, this is just volunteer work"

-

I was impressed by zope and plone.

But if those answers above were of official nature, I must seriously 
rethink if I can rely on _any_ system which is based on python, as the 
foundation and the community do not care about essential needs and 
requirements.

.

-- 
http://lazaridis.com


From me at privacy.net  Tue Feb 22 06:40:31 2005
From: me at privacy.net (Dan Sommers)
Date: 22 Feb 2005 06:40:31 -0500
Subject: python2.4 generator expression > python2.3 list expression
References: <mailman.2882.1108961815.22381.python-list@python.org>
	<m2oeee5e2k.fsf@unique.fully.qualified.domain.name.yeah.right>
	<Xns960552849F9ACduncanrcpcouk@127.0.0.1>
Message-ID: <m2acpwg6vk.fsf@unique.fully.qualified.domain.name.yeah.right>

On 22 Feb 2005 09:14:50 GMT,
Duncan Booth <duncan.booth at invalid.invalid> wrote:

> Here's yet another way to achieve the same results. This version doesn't 
> iterate over any bits at all:

>>>> import operator
>>>> parity = [ False ]
>>>> for i in range(7):
>         parity += map(operator.not_, parity)

Very clever!  :-)

Picking a nit, that version iterates over *two* sets of bits.  The "for"
loop over each possible bit in the input values.  The "map" function
over the parity bits accumulated up to that point.  And the "+="
operator over those same bits again.  Make that *three* sets of bits.

I stand humbled.

Regards,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>
?? ? ?? ? c? = 1


From whereU at now.com  Sat Feb 19 17:09:59 2005
From: whereU at now.com (Eric Pederson)
Date: Sat, 19 Feb 2005 14:09:59 -0800
Subject: exercise: partition a list by equivalence
In-Reply-To: <1108849063.857663.279920@c13g2000cwb.googlegroups.com>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<1108814276.680736.264380@l41g2000cwc.googlegroups.com>
	<1108849063.857663.279920@c13g2000cwb.googlegroups.com>
Message-ID: <20050219140959.10815564.whereU@now.com>

> From: "Xah Lee" <xah at xahlee.org>
>
> The GOTO statement from Perl has been messed up.


hey, I didn't do it!


> 
> This block:
> ?    for group in interm:



what do the funny little "?"s stand for?





Eric Pederson
http://www.songzilla.blogspot.com
:::::::::::::::::::::::::::::::::::
domainNot="@something.com"
domainIs=domainNot.replace("s","z")
ePrefix="".join([chr(ord(x)+1) for x in "do"])
mailMeAt=ePrefix+domainIs
:::::::::::::::::::::::::::::::::::



From jorgencederberg at hotmail.com  Fri Feb 25 02:44:28 2005
From: jorgencederberg at hotmail.com (=?ISO-8859-1?Q?J=F8rgen_Cederberg?=)
Date: Fri, 25 Feb 2005 08:44:28 +0100
Subject: Default value for Listbox (Tkinter)
In-Reply-To: <1109299588.575892.244990@g14g2000cwa.googlegroups.com>
References: <1109299588.575892.244990@g14g2000cwa.googlegroups.com>
Message-ID: <wHATd.15$L_6.10@news.get2net.dk>

Harlin Seritt wrote:
> Whenever I set up something similar:
> 
> vals = ['1', '2','3']
> for v in vals:
>    listbox.inset(END, v)
> 
> I notice that when this listbox is displayed, there is never a default
> value. How can I make sure that one of the indices is selected by
> default?
>

Hi Harlin,

you must use the select_set method of the listbox.

---
from Tkinter import *

root = Tk()
listbox = Listbox(root)
listbox.pack()

vals = ['1', '2','3']
for v in vals:
   listbox.insert(END, v)

listbox.select_set(0) # sets the first element

root.mainloop()
---

Some good resources for Tkinter:
http://www.pythonware.com/library/tkinter/introduction/index.htm
http://infohost.nmt.edu/tcc/help/pubs/tkinter/

HTH
J?rgen Cederberg


From jeffrey at fro.man  Fri Feb  4 10:55:37 2005
From: jeffrey at fro.man (Jeffrey Froman)
Date: Fri, 04 Feb 2005 07:55:37 -0800
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
	<7xy8e5jagh.fsf@ruckus.brouhaha.com>
	<1107490052.542546.285950@c13g2000cwb.googlegroups.com>
Message-ID: <11076nqn1ats421@corp.supernews.com>

M.E.Farmer wrote:

> Div is a block level tag and span isn't.
> You can also group them??together?and?nest?them.

One caveat here -- I don't believe you can (should) nest a <div> inside a
<span>, or for that matter, nest any block-level element inside an inline
element.

Jeffrey


From janeaustine50 at hotmail.com  Wed Feb 23 04:36:57 2005
From: janeaustine50 at hotmail.com (janeaustine50 at hotmail.com)
Date: 23 Feb 2005 01:36:57 -0800
Subject: Style guide for subclassing built-in types?
In-Reply-To: <1109150091.356411.150460@l41g2000cwc.googlegroups.com>
References: <ba1e306f.0502221846.70cb4d5c@posting.google.com>
	<1109127834.660822.247120@g14g2000cwa.googlegroups.com>
	<1109150091.356411.150460@l41g2000cwc.googlegroups.com>
Message-ID: <1109151417.903188.73790@f14g2000cwb.googlegroups.com>

Fuzzyman wrote:
> I guess print is using the __repr__ (or __str__ ?) methods of lsit -
> which you will need to override as well.
>
> Regards,
>
> Fuzzy
> http://www.voidspace.org.uk/python/index.shtml

Thank you but the problem is that I have to express my intention in
duplicate places -- __iter__(along with "next"), __str__, __eq__ and so
on.

p.s. the reason I'm not sticking to reversed or even reverse : suppose
the size of the list is huge.



From anomousty at webwonders.org  Fri Feb 18 12:31:46 2005
From: anomousty at webwonders.org (m)
Date: Fri, 18 Feb 2005 11:31:46 -0600
Subject: Newbie CGI problem
In-Reply-To: <mailman.2809.1108746657.22381.python-list@python.org>
References: <mailman.2809.1108746657.22381.python-list@python.org>
Message-ID: <cv58qr$5n8$1@nntp.msstate.edu>

Rory Campbell-Lange wrote:
> #!/usr/bin/python
> import cgi
> print "Content-type: text/html\n\n"
> print "hi"
> 
> Gives me the following in my browser:
> 
> '''
> hi
> Content-type: text/html
> 
> 
> hi
> '''
> 
> Why are there two 'hi's?
> 
> Thanks,
> Rory

gives just one hi for me.


From AnOvercomer02 at webtv.zzn.com  Tue Feb  8 05:06:17 2005
From: AnOvercomer02 at webtv.zzn.com (AnOvercomer02@webtv.net (Cody Houston))
Date: 8 Feb 2005 02:06:17 -0800
Subject: Learning Python - resources and ideas
Message-ID: <1107855763.533466.254380@c13g2000cwb.googlegroups.com>

Hi. What is the best way to learn Python? None of the local schools
near me teach any courses on the topic. Thanks.

--

Cody Houston
AnOvercomer02 at webtv.net



From michels at linmpi.mpg.de  Wed Feb 16 08:43:08 2005
From: michels at linmpi.mpg.de (Helmut Michels)
Date: Wed, 16 Feb 2005 14:43:08 +0100
Subject: [ANN] Data Plotting Library DISLIN 8.3
Message-ID: <cuvilc$23i1$5@gwdu112.gwdg.de>

I am pleased to announce version 8.3 of the data plotting software
DISLIN.

DISLIN is a high-level and easy to use plotting library for
displaying data as curves, bar graphs, pie charts, 3D-colour plots,
surfaces, contours and maps. Several output formats are supported
such as X11, VGA, PostScript, PDF, CGM, WMF, HPGL, TIFF, GIF, PNG,
BMP and SVG.

The software is available for several C, Fortran 77 and Fortran 90
compilers. Plotting extensions for the interpreting languages Perl,
Python and Java are also supported for the most operating systems.

DISLIN distributions and manuals in PDF, PostScript and HTML format
are available from the DISLIN home page

      http://www.dislin.de

and via FTP from the server

      ftp://ftp.gwdg.de/pub/grafik/dislin

  -------------------
   Helmut Michels
   Max Planck Institute for
   Solar System Research               Phone: +49 5556 979-334
   Max-Planck-Str. 2                   Fax  : +49 5556 979-240
   D-37191 Katlenburg-Lindau           Mail : michels at linmpi.mpg.de


From mahs at telcopartners.com  Fri Feb  4 22:55:03 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 04 Feb 2005 19:55:03 -0800
Subject: changing local namespace of a function
In-Reply-To: <4204400C.5060608@iinet.net.au>
References: <cu0lru$8ik$1@joe.rice.edu> <cu0sj5$sfk$1@sea.gmane.org>
	<4204400C.5060608@iinet.net.au>
Message-ID: <cu1fsm$chl$1@sea.gmane.org>

Nick Coghlan wrote:
> Michael Spencer wrote:
> 
>>> def fun(dict):
>>>   # set dict as local namespace
>>>   # locals() = dict?
>>>   z = x + y
>>
>>
>> As you no doubt have discovered from the docs and this group, that 
>> isn't doable with CPython.
> 
> 
> Not entirely impossible:
> 
> Py> def f(d):
> ...   exec "locals().update(d)"
> ...   return x + y
> ...
> Py> f(dict(x=1, y=2))
> 3
> 
> Due to the way 'exec' is implemented, modifications to locals() inside 
> an exec statement actually take effect (basically, they're freeloading 
> on the code which allows 'exec "x = 1"' to work properly).
> 
> This is an evil, evil hack and almost certainly not what anyone should 
> be doing. Also, variables created this way will be slower than normal 
> variables due to the way the associated code works.
> 
> Cheers,
> Nick.
> 
Oooh - evil indeed, but thanks for the pointer.

I debated including a link to one of the 'writable locals' threads, when I 
settled on not 'doable', but gambled on being probably useful rather than 
certainly accurate.  Just goes to show you can't get away with anything in this 
NG ;-)

Cheers

Michael



From raghulj at gmail.com  Mon Feb 21 23:29:38 2005
From: raghulj at gmail.com (Raghul)
Date: 21 Feb 2005 20:29:38 -0800
Subject: copying or moving the mail message using imaplib
In-Reply-To: <mailman.2918.1109045457.22381.python-list@python.org>
References: <1109044151.869953.187270@c13g2000cwb.googlegroups.com>
	<mailman.2918.1109045457.22381.python-list@python.org>
Message-ID: <1109046578.692118.24350@l41g2000cwc.googlegroups.com>

Thanks for ur message .How it is possible to copy the  messages betwwen
folder ?I can't understand the copy function in python documentation.
Please Can u give me a sample example for this. And I also to copy
using uid but in vain. here is my program.

#!/usr/bin/env python
#Normal Library
import socket
import os
import re
import time
import sys
import getopt
import types
import traceback
import email
import mhlib,popen2


import string, random
import StringIO, rfc822

import email.Parser
from getpass import getpass
from email.Header import Header
from email.Utils import parsedate
from imaplib import IMAP4 as BaseIMAP
from email.Message import Message
from email.Header import Header
# Antispam database lib


class IMAPSession(BaseIMAP):

   def __init__(self, server, port, debug=0, do_expunge=False):

            BaseIMAP.__init__(self, server, port)



   def getsizes(imap, msgs):
    uidfetchbatchsize =25
    res2=[]

    # Python really needs do - while
    while 1:
        if len(msgs)==0: break
        if len(msgs)>uidfetchbatchsize:
            msgmore=msgs[uidfetchbatchsize:]
            msgs=msgs[:uidfetchbatchsize]
        else:
            msgmore=[]
        msgs=string.join(msgs, ',')
        res=imap.uid("FETCH", msgs, "(UID RFC822.SIZE)")
        assertok(res, "uid fetch", msgs, "(UID RFC822.SIZE)")
        for i in res[1]:
            mo=gsre.match(i)
            if mo is None:
                if verbose: print "getsize Eh?", i
            else:
                res2.append((mo.group(2), mo.group(1)))
        msgs=msgmore
    return res2




def run():
	import getpass
	#name = raw_input("Enter User name : ")
	passwd = getpass.getpass ("Enter the password : ")
	server ="mail.myhost.com"
	port = 143
	ss = IMAPSession(server,port)
	sd = ss.login ("raghul",passwd)
	uidfetchbatchsize =25
	print ss.list()
	print ss.select('Junk E-mail')
	typ, data = ss.search(None,"ALL" )
	for num in data[0].split():
  	  typ, data = ss.fetch(num, '(RFC822)')
    	  print 'Message %s\n%s\n' % (num, data[0][1])
	  print "_____"
	  dat = ss.uid('copy',num,'INBOX')
	  print "copied"
	  print dat
	  print num
	  print "_____"
	ss.logout()











if __name__ == '__main__':
    run()



From evrim at ankabt.com  Sat Feb  5 02:43:44 2005
From: evrim at ankabt.com (Evrim Ozcelik)
Date: Sat, 05 Feb 2005 09:43:44 +0200
Subject: Medical GUI Application With Python
Message-ID: <42047930.1030604@ankabt.com>

We are developing a medical software about PSG (PolySomnoGraphy)
analysis. The application takes signal data from an electronic device and
we will show this continious signal function on the interfaces. There are
about 20-30 signal channels and the user selected channels are shown. We
want to run this application over different platforms.

My question is:

   1. What must be our IDE
   2. What class library for GUI must be use (wxWindows, Qt, GTK, etc.)
   3. Is there any GUI package for visulazing signal functions (like
      sinozodial functions) in real time; this module will behave as an
      oscilloscope

Thanks,

-- 

Evrim ?z?elik
Anka Information Technologies R&D Co.
Manager of Internet Technologies

Web   : http://www.ankabt.com/
Gsm   : +90 555 474 84 52
Phone : +90 212 276 19 69 # 134


-------------- next part --------------
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From robin at reportlab.com  Tue Feb 15 13:43:54 2005
From: robin at reportlab.com (Robin Becker)
Date: Tue, 15 Feb 2005 18:43:54 +0000
Subject: customizing metaclass constructed classes
In-Reply-To: <3A81C87DC164034AA4E2DDFE11D258E3398430@exchange.hqamor.amorhq.net>
References: <3A81C87DC164034AA4E2DDFE11D258E3398430@exchange.hqamor.amorhq.net>
Message-ID: <421242EA.2070701@chamonix.reportlab.co.uk>

Robert Brewer wrote:
.......
..........
> 
> You *are* using a language with callable functions, right? ;)
> 
> #base.py
> 
> def create_special_property(cls, f):
>    # create special property based on f
> 
> class M(type):
>     def __init__(cls, name, bases, dict):
>        super(M, cls).__init__(name, bases, dict)
>        for f in dict['_fieldDefs']:
>            create_special_property(cls, f)
> 
> #database.py
> class C(A):
>    _fieldDefs =[
>      IntColumn('id',primaryKey=1,allowNull=0),
>      TextColumn('name',allowNull=0,size=50),
>      TextColumn('description',allowNull=1,size=50),
>      ]
> 
> base.create_special_property(C, DateColumn('start_date'))

You're absolutely right :) I can modify the class in place if I
have access to the required modifications.

This seems more easily assimilable and definitely works in my cases.
Would it make sense to put the def create_special_property inside the metaclass 
as it then becomes available as a class method of A as well as being visible as 
cls.create_special_property(f) in the metaclass __init__?

> Slightly off-topic: if you really want to make it pretty, add a custom
> descriptor so you can write:
> 
> class C(A):
>    id = IntColumn(primaryKey=1,allowNull=0)
>    name = TextColumn(allowNull=0,size=50)
>    description = TextColumn(allowNull=1,size=50)
> 

I'll certainly take a look at this

> See UnitProperty (the descriptor), MetaUnit (the metaclass), and Unit
> (the domain object) in http://www.aminus.org/rbre/dejavu/__init__.py for
> an implementation of mine which you can steal in toto (because it's
> public domain).
> 

-- 
Robin Becker



From steven.bethard at gmail.com  Fri Feb 25 01:06:01 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 24 Feb 2005 23:06:01 -0700
Subject: Interesting decorator use.
In-Reply-To: <mailman.3025.1109286919.22381.python-list@python.org>
References: <421e2398@nntp0.pdx.net>	<mailman.3017.1109277781.22381.python-list@python.org>	<M5adncYw-5gT04PfRVn-ug@comcast.com>	<mailman.3022.1109283136.22381.python-list@python.org>	<A-2dnebKq7ywzoPfRVn-tQ@comcast.com>
	<mailman.3025.1109286919.22381.python-list@python.org>
Message-ID: <67-dndQDN9PaXYPfRVn-3A@comcast.com>

Tom Willis wrote:
>  Getting back to your recipe. Through the explanation of how to get
> parameters in there, I see how it is possible to get a logger in
> there.

Cool.  But credit where it's due, the recipe's Scott David Daniels's.  =)

STeVe


From deetsNOSPAM at web.de  Mon Feb 14 07:12:04 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 14 Feb 2005 13:12:04 +0100
Subject: Problem with nested lists as arrays
References: <1108382521.266024.281620@g14g2000cwa.googlegroups.com>
Message-ID: <37bisjF58tsaeU1@individual.net>

Some general remarks:

>     def getEmptySlot(self):
>         i = 0
>         j = 0
>         while i  <= self.dim-1:
>             while j  <= self.dim-1:
>                 if self.elements[j][i] == -1:
>                     return [j, i]
>                 j = j+1
>             j = 0
>             i = i + 1

make this:

def getEmptySlot(self):
    for i in xrange(self.dim):
        for j in xrange(self.dim):
            if self.elements[i][j] == -1:
                return (i,j)

>     def getPossibleMoves(self):
>         emptySlot = self.getEmptySlot()
>         y = emptySlot[1]
>         x = emptySlot[0]

make this:

x,y = self.getEmptySlot()



-- 
Regards,

Diez B. Roggisch


From gandalf at geochemsource.com  Tue Feb  8 07:59:48 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Tue, 08 Feb 2005 13:59:48 +0100
Subject: python connect to server using SSH protocol
In-Reply-To: <1107850655.289129.94880@o13g2000cwo.googlegroups.com>
References: <1107850655.289129.94880@o13g2000cwo.googlegroups.com>
Message-ID: <4208B7C4.5090000@geochemsource.com>

ajikoe at gmail.com wrote:

>How can python connect to server which use SSH protocol?
>Is it easy since my python has to run third party vendor, write data,
>read data inside the server (supercomputer).
>  
>
In advance, I'm not sure if I understood your problem.  SSH is clearly a 
remote
shell. You will be able to execute other programs on the remote computer.
Is is suitable to use this:

child_stdin,child_stdout,child_stderr =  os.popen2('ssh -l my_username  
my_host')


On the other side, you can write an application that also uses 
stdin/stdout for communication.
Best,

   Laci 2.0

-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From mefjr75 at hotmail.com  Sun Feb  6 22:58:25 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 6 Feb 2005 19:58:25 -0800
Subject: pygame.mixer.music not playing
References: <36mb0iF54udklU1@individual.net>
	<1107700800.258876.298010@z14g2000cwz.googlegroups.com>
	<36mvjkF54gvnrU1@individual.net>
Message-ID: <1107748705.808825.319270@f14g2000cwb.googlegroups.com>

Hello again,
 Sorry you have had no success. I would suspect it is your system
setup.
Seems the code is working. I didn't think you had the typo problem,
just mentioned it because it says somewhere in the docs that if the
mixer has problems with file loading it would result in a proxy object
that supported the play and stop commands.
Please post your os name and version, Python version, Pygame version,
etc.
Some genius out there might know how to fix it.
Also you can try and look for another sound package, like maybe pyFMOD
;)
Home of FMOD   http://www.fmod.org/
and the Python bindings  http://sourceforge.net/projects/uncassist
the people who wrote pyFMOD (lots of stuff there)
http://www.cs.unc.edu/~parente/tech/tr01.shtml
Hth,
M.E.Farmer



From tzot at sil-tec.gr  Thu Feb  3 08:43:26 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 03 Feb 2005 15:43:26 +0200
Subject: streaming a file object through re.finditer
References: <1107396145.400036.271010@g14g2000cwa.googlegroups.com>
	<mailman.1785.1107396839.22381.python-list@python.org>
	<1107397107.667600.326820@o13g2000cwo.googlegroups.com>
	<mailman.1789.1107400952.22381.python-list@python.org>
Message-ID: <b4a401tqj63138dgno7rqb116tafsk8ig7@4ax.com>

On Wed, 2 Feb 2005 22:22:27 -0500, rumours say that Daniel Bickett
<dbickett at gmail.com> might have written:

>Erick wrote:
>> True, but it doesn't work with multiline regular expressions :(

>If your intent is for the expression to traverse multiple lines (and
>possibly match *across* multiple lines,) then, as far as I know, you
>have no choice but to load the whole file into memory.

*If* the OP knows that their multiline re won't match more than, say, 4 lines at
a time, the code attached at the end of this post could be useful.  Usage:

for group_of_lines in line_groups(<file>, line_count=4):
    # bla bla

The OP should take care to ignore multiple matches as the n-line window scans
through the input file; eg. if your re searches for '3\n4', it will match 3
times in the first example of my code.

|import collections
|
|def line_groups(fileobj, line_count=2):
|    iterator = iter(fileobj)
|    group = collections.deque()
|    joiner = ''.join
|
|    try:
|        while len(group) < line_count:
|            group.append(iterator.next())
|    except StopIteration:
|        yield joiner(group)
|        return
|
|    for line in iterator:
|        group.append(line)
|        del group[0]
|        yield joiner(group)
|
|if __name__=="__main__":
|    import os, tempfile
|
|    # create two temp file for 4-line groups
|
|    # write n+3 lines in first file
|    testname1= tempfile.mktemp() # depracated & insecure but ok for this test
|    testfile= open(testname1, "w")
|    testfile.write('\n'.join(map(str, range(7))))
|    testfile.close()
|
|    # write n-2 lines in second file
|    testname2= tempfile.mktemp()
|    testfile= open(testname2, "w")
|    testfile.write('\n'.join(map(str, range(2))))
|    testfile.close()
|
|    # now iterate over four line groups
|
|    for bunch_o_lines in line_groups( open(testname1), line_count=4):
|        print repr(bunch_o_lines),
|    print
|
|    for bunch_o_lines in line_groups( open(testname2), line_count=4):
|        print repr(bunch_o_lines),
|    print
|
|    os.remove(testname1); os.remove(testname2)

-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From fredrik at pythonware.com  Mon Feb  7 18:11:14 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 00:11:14 +0100
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com><mailman.2092.1107797420.22381.python-list@python.org><5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com><mailman.2095.1107801722.22381.python-list@python.org>	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com><cu8h8k$md4$1@sea.gmane.org>
	<4207D64F.2000709@optushome.com.au>
Message-ID: <cu8sfj$q2u$1@sea.gmane.org>

Tim Churches wrote:

> Thus, it seems to me, and to the expert legal advice which we sought (note the scope of the advice 
> was Australian law only) that provided no GLPed source or object code is mixed, included or 
> combined with non-GPLed code

and how exactly are you going to load a DLL from an EXE file with-
out "mixing, including, or combining" the two?

I don't see how the legal advice you got is incompatible with the FAQ;
they both say that as long as you keep things separate, you're in the clear.
but as soon as you mix things, the GPL applies.

</F> 





From polytechnique at gmail.com  Mon Feb 28 11:31:09 2005
From: polytechnique at gmail.com (DENG)
Date: 28 Feb 2005 08:31:09 -0800
Subject: Share your SciTEGlobal.properties pls~~~~
Message-ID: <1109608269.649625.208200@o13g2000cwo.googlegroups.com>

hi,
im new to Python, i chose SciTE as my Python editor. but the problem is
SciTE needs to be config carefully, are there anyone use SciTE too? can
you share your SciTEGlobal.properties file? black background solution
is prefered:)

thanks in advance

best regards



From stephen.thorne at gmail.com  Fri Feb 11 02:10:25 2005
From: stephen.thorne at gmail.com (Stephen Thorne)
Date: Fri, 11 Feb 2005 17:10:25 +1000
Subject: convert list of tuples into several lists
In-Reply-To: <420c5241$0$6619$8fcfb975@news.wanadoo.fr>
References: <cud40u$vqb$01$1@news.t-online.com>
	<36uihlF58p63iU1@individual.net>
	<1107998078.610891.111510@z14g2000cwz.googlegroups.com>
	<QrOdnf4DLK2hjpbfRVn-hw@comcast.com>
	<420c5241$0$6619$8fcfb975@news.wanadoo.fr>
Message-ID: <3e8ca5c80502102310d434672@mail.gmail.com>

On Fri, 11 Feb 2005 07:35:43 +0100, Pierre Quentel
<quentel.pierre at wanadoo.fr> wrote:
> Steven Bethard a ?crit :
> > Cappy2112 wrote:
> >
> >> What does the leading * do?
> >
> >
> > Tells Python to use the following iterable as the (remainder of the)
> > argument list:
> >
> 
> Could someone explain why this doesn't work :
> 
> Python 2.3.2 (#49, Oct  2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)] on
> win32
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> def f(*args,**kw):
> ...     print args, kw
> ...
>  >>> f(*[1,2])
> (1, 2) {}
>  >>> f(*[1,2],x=1)
>    File "<stdin>", line 1
>      f(*[1,2],x=1)
>               ^
> SyntaxError: invalid syntax

the * and ** must occur at the end.

f(x=1, *[1,2]) is valid.

Stephen.


From tjreedy at udel.edu  Mon Feb 14 12:38:02 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 14 Feb 2005 12:38:02 -0500
Subject: nested lists as arrays
References: <1108384089.804375.179130@f14g2000cwb.googlegroups.com>
	<37bklfF5a7s7vU2@individual.net>
Message-ID: <cuqnh9$bqs$1@sea.gmane.org>


"Diez B. Roggisch" <deetsNOSPAM at web.de> wrote in message >

>And use xrange instead of range.

For small dimensions like 3,4,5, xrange is way overkill and perhaps takes 
both more space and time.  Since dim is a constant for a given puzzle, I 
would set self._range = range(dim) in __init__() and use that to iterate. 
And, as I said in another response, I would not iterate to make a move.

Terry J. Reedy






From jack at performancedrivers.com  Fri Feb  4 13:02:36 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Fri, 4 Feb 2005 13:02:36 -0500
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <dvOMd.33656$EG1.19314@lakeread04>
References: <dvOMd.33656$EG1.19314@lakeread04>
Message-ID: <20050204180236.GD1607@performancedrivers.com>

On Fri, Feb 04, 2005 at 12:43:37PM -0500, Alan McIntyre wrote:
> Hi all,
> 
> I have a list of items that has contiguous repetitions of values, but 
> the number and location of the repetitions is not important, so I just 
> need to strip them out.  For example, if my original list is 
> [0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5], I want to end up with [0,1,2,3,2,4,5].
> 
> Here is the way I'm doing this now:
> 
> def straightforward_collapse(myList):
>     collapsed = [myList[0]]
>     for n in myList[1:]:
>         if n != collapsed[-1]:
>             collapsed.append(n)
> 
>     return collapsed
> 
> Is there an elegant way to do this, or should I just stick with the code 
> above?
> 
If you are using python2.4,

>>> import itertools as it
>>> [x[0] for (x) in it.groupby([0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5])]
[0, 1, 2, 3, 2, 4, 5]
>>>

Since this is 2.4 you could also return a generator expression.

>>> def iter_collapse(myList):
...   return (x[0] for (x) in it.groupby([0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5]))
... 
>>> i = iter_collapse([0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5])
>>> i
<generator object at 0xb7df6b2c>
>>> list(i)
[0, 1, 2, 3, 2, 4, 5]
>>> 


-Jack



From ilias at lazaridis.com  Sun Feb  6 04:46:57 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sun, 06 Feb 2005 11:46:57 +0200
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
In-Reply-To: <mailman.2015.1107678627.22381.python-list@python.org>
References: <ctsjmg$75p$1@usenet.otenet.gr><pan.2005.02.03.19.10.39.349763@jerf.org>	<cu2m3q$km1$1@usenet.otenet.gr><mailman.1999.1107644058.22381.python-list@python.org>	<cu4ahl$a0s$1@usenet.otenet.gr>
	<mailman.2015.1107678627.22381.python-list@python.org>
Message-ID: <cu4p2e$edq$1@usenet.otenet.gr>

Terry Reedy wrote:
> "Ilias Lazaridis" <ilias at lazaridis.com> wrote in message
> 
>>>Then 'print html_doc_instance' can print the html doc corresponding to 
>>>the object model.
>>
>>I understand this procedure.
>>
>>I would like to use a standard way, which uses the standard metadata 
>>[implicit/explicit defined].
>>
>>Does such standard exist?
> 
> I am not sure of what *you* mean by 'standard way'.  

a formal standard (like e.g. ODMG for OODBMS).

a quasi standard (e.g. an widely accepted definition/inpementation etc.)

> That is probably 
> because Python and the community is not big on 'standard ways' other than 
> what is specified in the two reference manuals.  

I would say this is a "standard".

Can one please point me to a downloadable version of the 2 reference 
manuals (did not found them)?

> And even then, Python is 
> intentionally flexible in various ways (though not all).  

Flexibility is of course always very positive.

> So the answer to your question is probably 'no'.
> 
> Terry J. Reedy

.

-- 
http://lazaridis.com


From steven.bethard at gmail.com  Sun Feb  6 16:00:49 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 06 Feb 2005 14:00:49 -0700
Subject: loops -> list/generator comprehensions
In-Reply-To: <opsls54qat1js0xs@news.telkomsa.net>
References: <1107718117.221204.80410@l41g2000cwc.googlegroups.com>
	<opsls54qat1js0xs@news.telkomsa.net>
Message-ID: <4qCdnXI11-vhGJvfRVn-vQ@comcast.com>

On 6 Feb 2005 11:28:37 -0800, <jamesthiele.usenet at gmail.com> wrote:
 >
 >     walkList  = [(x[0], x[2]) for x in os.walk(".")]
 >     filenames = []
 >     for dir, files in walkList:
 >         filenames.extend(["/".join([dir, f]) for f in files])

Caleb Hattingh top-posted:
> I would be interested to see an example of code that is more concise 
> but  yet as *clear* as the one you already have.

Out of curiosity, do you find:

filenames = [os.path.join(dirpath, filename)
              for dirpath, _, filenames in os.walk('.')
              for filename in filenames]

harder to read?

Steve


From erikbethke at gmail.com  Tue Feb  8 13:35:28 2005
From: erikbethke at gmail.com (Erik  Bethke)
Date: 8 Feb 2005 10:35:28 -0800
Subject: Effbot's SimpleXMLWriter fails when py2exe'd
In-Reply-To: <mailman.2198.1107881506.22381.python-list@python.org>
References: <1107880337.524216.180440@g14g2000cwa.googlegroups.com>
	<mailman.2198.1107881506.22381.python-list@python.org>
Message-ID: <1107887728.421109.221640@f14g2000cwb.googlegroups.com>

Awesome!

Great thank you both, fixed!

-Erik



From eee at nmt.edu  Sat Feb  5 08:51:32 2005
From: eee at nmt.edu (Earl Eiland)
Date: Sat, 05 Feb 2005 06:51:32 -0700
Subject: Trouble converting hex to decimal?
Message-ID: <1107611491.18588.26.camel@dulcevida>

I'm trying to process the IP packet length field, as recorded by pcap
(Ethereal) and recovered using pcapy.  When I slice out those bytes, I
get a value that shows in '\x00' format, rather than '0x00'.  Neither
int() nor eval() are working.  How do I handle this?

Earl Eiland



From bvande at po-box.mcgill.ca  Sat Feb  5 17:30:31 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Sat, 05 Feb 2005 17:30:31 -0500
Subject: empty classes as c structs?
In-Reply-To: <864d37090502051335f71127c@mail.gmail.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
	<MIadnXkLYul4hZjfRVn-2Q@comcast.com>
	<42053394.6020203@po-box.mcgill.ca>
	<864d37090502051335f71127c@mail.gmail.com>
Message-ID: <42054907.5000802@po-box.mcgill.ca>

Carlos Ribeiro said unto the world upon 2005-02-05 16:35:
> On Sat, 05 Feb 2005 15:59:00 -0500, Brian van den Broek
> <bvande at po-box.mcgill.ca> wrote:
> 
>>(I'm just a hobbyist, so if this suggestion clashes with some well
>>established use of 'Bag' in CS terminology, well, never mind.)
> 
> 
> There's already a well know know use for the 'bag' name, including a
> recipe in Python. A bag is an arbitrary collection of objects. It's
> similar to a set. The cookbook code is at:
> 
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/259174

OK then, never mind ;-)

Thanks for the link. Best,

Brian vdB




From tjreedy at udel.edu  Thu Feb 10 02:14:56 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 10 Feb 2005 02:14:56 -0500
Subject: Testing conditions.
References: <cues7q$mg7$1@news7.svr.pol.co.uk>
Message-ID: <cuf1ic$m4c$1@sea.gmane.org>


"Ray Gibbon" <ray at rgibbon.freeserve.co.uk> wrote in message 
news:cues7q$mg7$1 at news7.svr.pol.co.uk...
> e.g. 1
> |    while new_data = get_more_data(source):
> |        process_data(new_data)
>
> is obviously the sort of thing I'm missing, but it is not a general 
> solution
> because :-
>
> e.g. 2
> |    while new_data, environment = get_more_data(source):
> |        process_data(new_data, environment)
>
> is something I'm equally likely to want to do, but I can't express it's
> meaning.

The other problem with while loops, even if assignment were allowed, is 
that the loop stops on any null (False) value.  So you soon would need to 
have the assignment buried within a comparison expression, as in C.

> Before I resign myself to the inevitable, 'that's the way it is - get 
> used
> to it', I'd just like to scratch it once.  But, before I try walking on 
> very
> thin ice, I want to ask whether there are expectations of some future
> changes which address these issues?

As Jeremy already implicitly pointed out, for loops already address these 
issues by combining assignment and a stop test, with the stop test being 
for a StopIteration exception rather than a null value.  Separating data 
generation and validation from data processing is much cleaner.

Terry J. Reedy





From steven.bethard at gmail.com  Tue Feb 15 11:03:06 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 15 Feb 2005 09:03:06 -0700
Subject: newbie question convert C to python
In-Reply-To: <7xr7jixxdm.fsf@ruckus.brouhaha.com>
References: <1108440952.526232.234130@c13g2000cwb.googlegroups.com>
	<7xr7jixxdm.fsf@ruckus.brouhaha.com>
Message-ID: <3P6dnYqXu9GngI_fRVn-2g@comcast.com>

Paul Rubin wrote:
> doodle4 at gmail.com writes:
> 
>>How do i handle this piece of code in python:
>>
>># define vZero 15
>># define vOne  20
>>
>>unsigned int vTable[Zero][One]
>>
>>if(vGroup[vZero][vOne] == 0)
>>    {
>>         vGroup[vZero][vOne]--
>>         .....
>>         .....
>>    }
> 
> Simplest might be with a dictionary:
> 
> vGroup = {}    # I assume you meant vGroup not vTable
> if vGroup[(vZero, vOne)] == 0:
>    vGroup[(vZero, vOne)] -= 1
>    .....
>    .....

Or, if you like, the parentheses are unnecessary:

vGroup = {}
if vGroup[vZero, vOne] == 0:
    vGroup[vZero, vOne] -= 1
    .....

This (or the semantically identical version with parentheses) is 
definitely the best approach if you expect to have a lot of empty spots 
in your table.

STeVe


From john at grulic.org.ar  Fri Feb 18 09:43:03 2005
From: john at grulic.org.ar (John Lenton)
Date: Fri, 18 Feb 2005 11:43:03 -0300
Subject: low-end persistence strategies?
In-Reply-To: <1108707658.105102.298300@z14g2000cwz.googlegroups.com>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<mailman.2735.1108616299.22381.python-list@python.org>
	<1108622622.119311.43200@f14g2000cwb.googlegroups.com>
	<mailman.2746.1108629315.22381.python-list@python.org>
	<1108629775.800508.3400@f14g2000cwb.googlegroups.com>
	<mailman.2777.1108674138.22381.python-list@python.org>
	<1108702957.327528.22010@z14g2000cwz.googlegroups.com>
	<mailman.2790.1108704152.22381.python-list@python.org>
	<1108707658.105102.298300@z14g2000cwz.googlegroups.com>
Message-ID: <20050218144303.GB17991@grulic.org.ar>

On Thu, Feb 17, 2005 at 10:20:58PM -0800, Michele Simionato wrote:
> Ok, I have yet another question: what is the difference
> between fcntl.lockf  and fcntl.flock? The man page of
> my Linux system says that flock is implemented independently
> of fcntl, however it does not say if I should use it in preference
> over fcntl or not.

it depends on what you want to do: as the manpages say, flock is
present on most Unices, but lockf is POSIX; flock is BSD, lockf is
SYSV (although its in XPG4.2, so you have it on newer Unices of any
flavor); on Linux, lockf works over NFS (if the server supports it),
and gives you access to mandatory locking if you want it. You can't
mix lockf and flock (by this I mean: you can get a LOCK_EX via flock
and via lockf on the same file at the same time).

So: use whichever you feel more comfortable with, although if you are
pretty confident your program will run mostly on Linux there is a bias
towards lockf given its extra capabilities there.

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
??  QQuuiittaa  eell  LLooccaall  EEcchhoo,,  MMaannoolloo  !!
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From jerf at jerf.org  Thu Feb  3 14:14:06 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 03 Feb 2005 14:14:06 -0500
Subject: Integrated Testing - Peppable?
References: <1107373949.960435.212020@z14g2000cwz.googlegroups.com>
	<pan.2005.02.02.21.29.03.688303@jerf.org>
	<1107452455.739263.145440@f14g2000cwb.googlegroups.com>
Message-ID: <pan.2005.02.03.19.14.05.789582@jerf.org>

On Thu, 03 Feb 2005 09:40:55 -0800, carl.manaster at gmail.com wrote:

> Thanks, Jeremy,
> 
>> No prose can compare to a live, functional demonstration.
> 
> I agree; that's what my prototype amounts to:
> 
> <http://prdownloads.sourceforge.net/zbt/zbt.zip?download>
> 
> (sorry, it's Windows-only)
> 
> But I take your larger message, and John's, to heart - this isn't
> worthy of making it into Python.  OK; thanks anyway for taking the time
> to think about it and reply.

But I do encourage you, if you believe in this, to continue working on it
as a module. Unfortunately, I don't run Windows so if it's Windows only I
can't really look at that. I would certainly be interested in at least
trying it if you ever got a more generally cross-platform release. Be sure
to ANN: ounce it here, if you do.

As I just wrote in another message (although stated another way), "useful"
and "in the standard library" aren't necessarily related!


From klachemin at comcast.net  Mon Feb 14 09:06:49 2005
From: klachemin at comcast.net (Kamilche)
Date: 14 Feb 2005 06:06:49 -0800
Subject: Help with embedding fully qualified script name
In-Reply-To: <hKUPd.12218$oO.7293@newsread2.news.atl.earthlink.net>
References: <hKUPd.12218$oO.7293@newsread2.news.atl.earthlink.net>
Message-ID: <1108390009.262197.121560@g14g2000cwa.googlegroups.com>

To avoid pathname headaches, I've taken to including the following 3
lines at the top of every script that will be double-clicked:

import os, sys
pathname, scriptname = os.path.split(sys.argv[0])
pathname = os.path.abspath(pathname)
os.chdir(pathname)



From almad at include.cz  Mon Feb  7 18:15:47 2005
From: almad at include.cz (Almad)
Date: Tue, 08 Feb 2005 00:15:47 +0100
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
	<7xy8e5jagh.fsf@ruckus.brouhaha.com>
	<1107490052.542546.285950@c13g2000cwb.googlegroups.com>
Message-ID: <cu8sr3$2v1v$1@news.vol.cz>

M.E.Farmer wrote:

> Paul Rubin wrote:
> To emulate a table you use the div and span tag.

Sorry, but I don't think that this is the way you have to create web pages. 
I think the most important think is to have web pages "semantic valid". That
means, do not use table for formatting whole page, but when you have table
data, you have to use tables. Don't you? 
-- 
Lukas "Almad" Linhart
[:: http://www.almad.net/ ::]
[:: Humans are too complicated to be described with words. ::]
[:: PGP/GNUPg key: http://www.almad.net/download/pubkey.asc ::]


From sjmachin at lexicon.net  Wed Feb 16 17:56:49 2005
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 17 Feb 2005 09:56:49 +1100
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<mailman.2717.1108585355.22381.python-list@python.org>
Message-ID: <iti7115tks5dli5gm6iua3qt01e5i18lhq@4ax.com>

On Wed, 16 Feb 2005 14:24:02 -0600, Skip Montanaro <skip at pobox.com>
wrote:

>
>    John> 4. For consistency, would you like "1" + 2 to produce "12"?
>
>No, the correct answer is obviously 3. ;-)
>

Obviously, in awk. Bletch! I once had to help out some users of a
system where software development had been outsourced and upstuffed
and they needed some data file fixups done but their system was so
locked down even the manufacturer-supplied free pre-ANSI C compiler
had been deleted and one couldn't download stuff off the net but the
thought police had overlooked awk ... I even had to implement proper
CSV-reading routines in awk. No thanks for reminding me :-(



From onurb at xiludom.gro  Mon Feb 14 08:14:28 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Mon, 14 Feb 2005 14:14:28 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cuo71l$gig$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
Message-ID: <4210a434$0$23451$626a14ce@news.free.fr>

Ilias Lazaridis wrote:
> I'm a newcomer to python:
> 
> [EVALUATION] - E01: The Java Failure - May Python Helps?
> http://groups-beta.google.com/group/comp.lang.python/msg/75f0c5c35374f553
> 

My trollometer's beeping...

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for 
p in 'onurb at xiludom.gro'.split('@')])"


From kent3737 at yahoo.com  Sat Feb  5 11:16:29 2005
From: kent3737 at yahoo.com (Kent Johnson)
Date: Sat, 05 Feb 2005 11:16:29 -0500
Subject: changing local namespace of a function
In-Reply-To: <cu1518$ld6$1@joe.rice.edu>
References: <cu0lru$8ik$1@joe.rice.edu>
	<mailman.1926.1107555819.22381.python-list@python.org>
	<cu1518$ld6$1@joe.rice.edu>
Message-ID: <4204ee9b_2@newspeer2.tds.net>

Bo Peng wrote:
> Yes. I thought of using exec or eval. If there are a dozen statements,
> 
> def fun(d):
>   exec 'z = x + y' in globals(), d
> 
> seems to be more readable than
> 
> def fun(d):
>   d['z'] = d['x'] + d['y']
> 
> But how severe will the performance penalty be?

You can precompile the string using compile(), you only have to do this once.

  >>> def makeFunction(funcStr, name):
  ...   code = compile(funcStr, name, 'exec')
  ...   def f(d):
  ...     exec code in d
  ...     del d['__builtins__'] # clean up extra entry in d
  ...   return f
  ...
  >>> f = makeFunction('z = x + y', 'f')
  >>> a = {'x':1, 'y':2}
  >>> b = {'x':3, 'y':3}
  >>> f(a)
  >>> a
{'y': 2, 'x': 1, 'z': 3}
  >>> f(b)
  >>> b
{'y': 3, 'x': 3, 'z': 6}


From ncoghlan at iinet.net.au  Tue Feb 22 04:33:30 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Tue, 22 Feb 2005 19:33:30 +1000
Subject: subclassing Decimal
In-Reply-To: <1109038642.719116.221250@o13g2000cwo.googlegroups.com>
References: <1109022264.823730.224910@o13g2000cwo.googlegroups.com>	<8sadneLa1dUmxoffRVn-uw@comcast.com>
	<1109038642.719116.221250@o13g2000cwo.googlegroups.com>
Message-ID: <421AFC6A.7050201@iinet.net.au>

jbauer at rubic.com wrote:
> yea-though-I-walk-thru-the-valley-of-__new__-I-will-fear-no-super-ly

That's beautiful }:>

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From neutrinman at myrealbox.com  Thu Feb 24 11:36:17 2005
From: neutrinman at myrealbox.com (neutrinman at myrealbox.com)
Date: 24 Feb 2005 08:36:17 -0800
Subject: what is wrong?
Message-ID: <1109262977.742242.179610@l41g2000cwc.googlegroups.com>

I cannot find out why the following code generates the error:
Traceback (most recent call last):
  File "D:/a/Utilities/python/ptyhon22/test.py", line 97, in ?
    main()
  File "D:/a/Utilities/python/ptyhon22/test.py", line 60, in main
    crit = Critter(crit_name)
  File "D:/a/Utilities/python/ptyhon22/test.py", line 8, in __init__
    self.feed = feed            # I wrote this
AttributeError: can't set attribute

I add some codes to a program on a book. The lines that have "I wrote
this" comment is the added codes. Could anyone tell me what is worng
here?

--------------
##
class Critter(object):
    """A virtual pet"""
    def __init__(self, name, hunger = 0, boredom = 0, feed = 0):
        self.name = name
        self.hunger = hunger
        self.boredom = boredom
        self.feed = feed            # I wrote this

    def __pass_time(self):
        self.hunger += 1
        self.boredom += 1

    def __feed_time(self):          # I worte this
        self.feed += 1              # I wote this

    def __get_feed(self):           # I wrote this
        return self.feed            # I worte this

    feed = property(__get_feed)     # I wrote this

    def __get_mood(self):
        unhappiness = self.hunger + self.boredom
        if unhappiness < 5:
            mood = "happy"
        elif 5 <= unhappiness <= 10:
            mood = "okay"
        elif 11 <= unhappiness <= 15:
            mood = "frustrated"
        else:
            mood = "mad"
        return mood

    mood = property(__get_mood)

    def talk(self):
        print "I'm", self.name, "and I feel", self.mood, "now.\n"
        self.__pass_time()

    def eat(self, food = 4):
        print "Brruppp.  Thank you."
        self.hunger -= food
        self.__feed_time()          # I wrote this
        print self.feed             # I wrote this
        if self.hunger < 0:
            self.hunger = 0
        self.__pass_time()

    def play(self, fun = 4):
        print "Wheee!"
        self.boredom -= fun
        if self.boredom < 0:
            self.boredom = 0
        self.__pass_time()

##

def main():
    crit_name = raw_input("What do you want to name your critter?: ")
    crit = Critter(crit_name)

    choice = None
    while choice != "0":
        print \
        """
        Critter Caretaker

        0 - Quit
        1 - Listen to your critter
        2 - Feed your critter
        3 - Play with your critter
        """

        choice = raw_input("Choice: ")
        print

        # exit
        if choice == "0":
            print "Good-bye."

        # listen to your critter
        elif choice == "1":
            crit.talk()

        # feed your critter
        elif choice == "2":
            crit.eat()

        # play with your critter
        elif choice == "3":
            crit.play()

        # some unknown choice
        else:
            print "\nSorry, but", choice, "isn't a valid choice."

main()
("\n\nPress the enter key to exit.")



From fredrik at pythonware.com  Mon Feb  7 11:31:41 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 7 Feb 2005 17:31:41 +0100
Subject: xmlentities
References: <66dkd2-6f2.ln1@pluto.i.infosense.no>
Message-ID: <cu852g$9sd$1@sea.gmane.org>

Ola Natvig wrote:

> Does anyone know a good library for transfering non standard characters to enity characters in 
> html. I want characters like < and > to be transformed to &lt; and &gt;. And the norwegian ? to 
> &oslash;

the third example on

    http://effbot.org/librarybook/htmlentitydefs.htm

includes a function that translates an ISO-8859-1 encoded string to HTML-
encoded text.

</F> 





From alan.mcintyre at esrgtech.com  Sun Feb 13 12:01:20 2005
From: alan.mcintyre at esrgtech.com (Alan McIntyre)
Date: Sun, 13 Feb 2005 12:01:20 -0500
Subject: changing __call__ on demand
In-Reply-To: <cuo0e1$4l2$1@lnx107.hrz.tu-darmstadt.de>
References: <cuo0e1$4l2$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <AJLPd.107521$Jk5.31052@lakeread01>

I tried this:

 >>>class test(object):
...	def __call1(self):
...		print 1
...	__call__ = __call1
...
 >>>t = test()
 >>>t()
1
 >>>

Is that what you were looking for?

-- 
Alan McIntyre
ESRG LLC
http://www.esrgtech.com

Stefan Behnel wrote:
> Hi!
> 
> This somewhat puzzles me:
> 
> Python 2.4 (#1, Feb  3 2005, 16:47:05)
> [GCC 3.3.4 (pre 3.3.5 20040809)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> 
> .>>> class test(object):
> ...   def __init__(self):
> ...     self.__call__ = self.__call1
> ...   def __call1(self):
> ...     print 1
> ...   def __call__(self):
> ...     print 2
> ...
> .>>> t = test()
> .>>> t()
> 2
> 
> If I take out the __call__ method completely and only set it in 
> __init__, I get a TypeError saying that test is not callable.
> 
> I want to use this in order to provide different implementations based 
> on the object configuration. Calculating the right function to call is 
> non-trivial and calls are frequent, so I want to change __call__ in 
> order to run the right function directly.
> 
> I know, I could use another level of indirection:
> 
> def __call__(self):
>   self.the_right_method()
> 
> and then set the_right_method accordingly, but I find that somewhat 
> sub-optimal. Is there a way to change __call__ after class creation?
> 
> Stefan



From deetsNOSPAM at web.de  Tue Feb 22 07:55:18 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Tue, 22 Feb 2005 13:55:18 +0100
Subject: Sequence of empty lists
References: <ICBCFo.LG3@bath.ac.uk>
Message-ID: <380obbF5g1lfrU1@individual.net>


seq = [[] for i in xrange(10)]

-- 
Regards,

Diez B. Roggisch


From jerf at jerf.org  Thu Feb 17 11:33:16 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 17 Feb 2005 11:33:16 -0500
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<37hqlrF59l2b2U1@individual.net>
	<873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<421450CC.9080504@swiftdsl.com.au>
	<87psyz8h9o.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<4214A800.4010509@swiftdsl.com.au>
	<pan.2005.02.17.15.13.36.917107@jerf.org>
	<TC7Rd.6895$zs.432@okepread04>
Message-ID: <pan.2005.02.17.16.33.16.191423@jerf.org>

On Thu, 17 Feb 2005 14:00:59 -0700, Dave Benjamin wrote:

> Jeremy Bowers wrote:
>> I'd point out that the Zen that can be comprehended by checking off items
>> in a list is not the true Zen.
> 
> The Zen that can be imported is not the eternal Zen. =)

Yes, there is that too. :-)


From lbates at syscononline.com  Fri Feb 11 16:34:01 2005
From: lbates at syscononline.com (Larry Bates)
Date: Fri, 11 Feb 2005 15:34:01 -0600
Subject: Commerical graphing packages?
In-Reply-To: <420d1595$1@nntp.zianet.com>
References: <420d1595$1@nntp.zianet.com>
Message-ID: <k4OdncL6gbhbuZDfRVn-pg@comcast.com>

ReportLab has pretty good Graphics Module.  About the only thing
it needs is Python Imaging Library (which you would probably
want anyway).

Larry Bates


Erik Johnson wrote:
>     I am wanting to generate dynamic graphs for our website and would rather
> not invest the time in developing the code to draw these starting from
> graphics primitives. I am looking for something that is... "fairly robust"
> but our needs are relatively modest: X-Y scatter plots w/ data point
> symbols, multiple data set X-Y line plots, bar charts, etc.
> 
>     Preferably this would come from a company that can provide support &
> decent documentation, and a package that can be installed without a bunch of
> extra hassle (e.g., needs Numeric Python, needs to have the GD library
> installed, needs separate JPEG encoders, font libraries, etc.)
> 
>     I am aware of ChartDirector (http://www.advsofteng.com/ ) which
> explicitly supports python and seems to be about the right level of
> sophistication. I don't really know of any other packages in this space, do
> you? I am seeking feedback and reccomendations from people who have used
> this package or similar ones. I am particularly interested to hear about any
> limitations or problems you ran into with whatever package you are using.
> 
> Thanks for taking the time to read my post! :)
> 
> -ej
> 
> 


From caleb1 at telkomsa.net  Tue Feb 15 20:45:01 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Tue, 15 Feb 2005 20:45:01 -0500
Subject: some qustions on python
References: <mailman.2640.1108491417.22381.python-list@python.org>
Message-ID: <opsl9ohb0q1js0xs@news.telkomsa.net>

http://www.python.org

On Tue, 15 Feb 2005 13:16:53 -0500, samar bazied <smile-s at alloymail.com>  
wrote:

> Hi..
> plz
> can u help me??
> I am very new in python and I have some qustions about it.
> can u give me design process of python and their related langauges?
> and I will be very habby if u give me small evaluation of python>>
> plz..
> plz...
> plz....
> help me..
> ------------



From marian at mba-software.de  Sun Feb  6 23:33:58 2005
From: marian at mba-software.de (=?ISO-8859-1?Q?Marian_Aldenh=F6vel?=)
Date: Mon, 07 Feb 2005 05:33:58 +0100
Subject: pygame.mixer.music not playing
In-Reply-To: <1107748705.808825.319270@f14g2000cwb.googlegroups.com>
References: <36mb0iF54udklU1@individual.net>
	<1107700800.258876.298010@z14g2000cwz.googlegroups.com>
	<36mvjkF54gvnrU1@individual.net>
	<1107748705.808825.319270@f14g2000cwb.googlegroups.com>
Message-ID: <36o9dvF53a94mU1@individual.net>

Hi,

> Please post your os name and version, Python version, Pygame version,

German Windows XP Home, 2.3.4, 1.6

> Also you can try and look for another sound package

I will. Until I find something suitable I will just build a dummy class
that has the commands I need, I can later interface that to whatever I
really use. Should I ever get to that point - as I said, this is a toy
project and they tend to die suddenly :-).

Ciao, MM
-- 
Marian Aldenh?vel, Rosenhain 23, 53123 Bonn. +49 228 624013.
http://www.marian-aldenhoevel.de
"Wir brauchen keine Opposition, wir sind bereits Demokraten."


From mchermside at ingdirect.com  Fri Feb  4 13:24:39 2005
From: mchermside at ingdirect.com (Chermside, Michael)
Date: Fri, 4 Feb 2005 13:24:39 -0500
Subject: Converting strings to dates
Message-ID: <0CFFADBB825C6249A26FDF11C1772AE1021C1B7F@ingdexj1.ingdirect.com>

I'm trying to convert a string back into a datetime.date.

First I'll create the string:


Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import time, datetime
>>> a_date = datetime.date.today()
>>> s = str(a_date)
>>> print s
2005-02-04

Now I convert it back:

>>> new_date = datetime.date.fromtimestamp(
...     time.mktime(time.strptime(s, '%Y-%m-%d')))
>>> new_date
datetime.date(2005, 2, 4)


WOW, that's ugly. Is there a more concise way to do this?

-- Michael Chermside


This email may contain confidential or privileged information. If you believe you have received the message in error, please notify the sender and delete the message without copying or disclosing it.



From ajikoe at gmail.com  Wed Feb  9 10:56:27 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 9 Feb 2005 07:56:27 -0800
Subject: multi threading in multi processor (computer)
In-Reply-To: <420a2938$0$22987$626a14ce@news.free.fr>
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<420a2938$0$22987$626a14ce@news.free.fr>
Message-ID: <1107964587.818199.223980@g14g2000cwa.googlegroups.com>

Hello Pierre,

That's a pity, since when we have to run parallel, with single
processor is really  not efficient. To use more computers I think is
cheaper than to buy super computer in developt country.

Sincerely Yours,
pujo aji



From oyesiji at hotmail.com  Thu Feb 24 20:28:28 2005
From: oyesiji at hotmail.com (Jubri Siji)
Date: Fri, 25 Feb 2005 01:28:28 GMT
Subject: Best IDe
Message-ID: <0bvTd.52404$wc.42219@trnddc07>

Please i am new to python , whats the best IDE to start with 




From harlinseritt at yahoo.com  Mon Feb 21 21:35:06 2005
From: harlinseritt at yahoo.com (Harlin)
Date: 21 Feb 2005 18:35:06 -0800
Subject: How to write a ping client
Message-ID: <1109039706.092671.137360@f14g2000cwb.googlegroups.com>

Is there a way to write a ping client? I would like to be able to write
a small ping client so that I dont have to do os.system('ping args')
and thereby keep the resource overhead low. Does anyone know how this
can be done or can point me in the right direction?

thanks,

Harlin



From pierre.barbier at cirad.fr  Wed Feb  9 11:21:07 2005
From: pierre.barbier at cirad.fr (Pierre Barbier de Reuille)
Date: Wed, 09 Feb 2005 17:21:07 +0100
Subject: convert list of tuples into several lists
In-Reply-To: <cudcad$2bu$03$1@news.t-online.com>
References: <cud40u$vqb$01$1@news.t-online.com>
	<36uihlF58p63iU1@individual.net>
	<cudcad$2bu$03$1@news.t-online.com>
Message-ID: <420a37fd$0$12847$626a14ce@news.free.fr>

Oliver Eichler a ?crit :
> Diez B. Roggisch wrote:
> 
> 
>>zip(*[(1,4),(2,5),(3,6)])
>>
> 
> Thanks :) I knew it must be simple. The asterics - thing was new to me. 
> 
> By the way: What is faster?
> 
> this:
> 
> z = [(1,4),(2,5),(3,6)
> a,b = zip(*[(x[0], x[0]-x[1]) for x in z])
> 
> or:
> 
> a = []
> b = []
> for x in z:
>   a.append(x[0])
>   b.append(x[0]-x[1])
> 
> I guess first, isn't it?
> 
> 
> Oliver

Best answer is : try it :)
use the "timeit" module (in the standard lib) to do so ...

Pierre


From ncoghlan at iinet.net.au  Fri Feb 11 23:36:51 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 12 Feb 2005 14:36:51 +1000
Subject: namespaces module (a.k.a. bunch, struct, generic object, etc.)
 PEP
In-Reply-To: <LvSdnbe2vZhv2ZDfRVn-tQ@comcast.com>
References: <GaudndOHLML3M5bfRVn-vg@comcast.com>	<mailman.2383.1108124347.22381.python-list@python.org>
	<LvSdnbe2vZhv2ZDfRVn-tQ@comcast.com>
Message-ID: <420D87E3.7010904@iinet.net.au>

Steven Bethard wrote:
>>> Should namespace chaining be supported?  One suggestion would add a
>>> NamespaceChain object to the module::
>>
>>
>> This does have the advantage of keeping the basic namespace simple. 
>> However, it may also be worth having native chaining support in 
>> Namespace:
> 
> 
> I think I prefer the separate NamespaceChain object because it allows 
> you to chain namespaces other than just Namespace objects -- any object 
> that supports getattr is okay.  If chaining is builtin, all namespaces 
> (except the last one?) have to be Namespace objects...

I like NamespaceChain too - I was simply thinking it might be good to have a
recursive chaining method associated with actual Namespace objects as well.

However, now that I look more closely at NamespaceChain, it makes more sense to
me to explicitly make the 'head' of the chain a namespace view in its own right.
This should also make the local binding, chained lookup behaviour fairly obvious
(since it will work just as it does for any class with __getattr__ defined, but
not __setattr__ or __delattr__).


That is, something like:

     class NamespaceChain(NamespaceView):
         def __init__(self, head, *args):
             NamespaceView.__init__(self, head)
             self.__namespaces__ = args

         def __getattr__(self, name):
             """Return the first such attribute found in the object list

             This is only invoked for attributes not found in the head
             namespace.
             """
             for obj in self.__namespaces__:
                 try:
                     return getattr(obj, name)
                 except AttributeError:
                     pass
             raise AttributeError(name)


Python gives us the local set and local del for free.

The 'nested namespaces' approach that prompted my original suggestion can then
be spelt by using:

   parent = Namespace()
   child1 = NamespaceChain({}, parent)
   child2 = NamespaceChain({}, child1)

There *is* a problem with using __getattr__ though - any attribute in the 
chained namespaces that is shadowed by a class attribute (like 'update') will be 
picked up from the class, not from the chained namespaces. So we do need to use 
__getattribute__ to change that lookup order. However, given the amount of grief 
the default lookup behaviour causes, I think the place to do that is in 
Namespace itself:

     class Namespace(object):
         # otherwise unchanged
         def __getattribute__(self, name):
             """Namespaces do NOT default to looking in their class dict
             for non-magic attributes
             """
             getattribute = super(Namespace, self).__getattribute__
             try:
                 return getattribute("__dict__")[name]
             except KeyError:
                 if name.startswith('__') and name.endswith('__'):
                     # Employ the default lookup system for magic names
                     return getattribute(name)
                 else:
                     # Skip the default lookup system for normal names
                     if hasattr(self, "__getattr__"):
                         return getattribute("__getattr__")(name)
                     else:
                         raise AttributeError(name)

The above is a pretty simple approach - it completely bypasses the descriptor 
machinery for non-magic names. This means that the instance namespace does NOT 
get polluted by any non-magic names in the class dictionary, but magic names can 
be accessed normally. And subclasses can add their own methods, and this feature 
will continue to 'just work'. For example:

Py> ns = namespaces.Namespace()
Py> ns.update
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "namespaces.py", line 30, in __getattribute__
     raise AttributeError(name)
AttributeError: update
Py> type(ns).update
<unbound method Namespace.update>
Py> ns.__init__
<bound method Namespace.__init__ of Namespace()>

(side note: I don't think I have ever written a __getattribute__ method without 
introducing an infinite recursion on the first attempt. . .)

Anyway, it is probably worth digging into the descriptor machinery a bit further 
in order to design a lookup scheme that is most appropriate for namespaces, but 
the above example has convinced me that object.__getattribute__ is NOT it :)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net



From bvande at po-box.mcgill.ca  Mon Feb 28 02:26:24 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Mon, 28 Feb 2005 02:26:24 -0500
Subject: Trees
In-Reply-To: <42226BBB.3010203@psi.com.au>
References: <42226BBB.3010203@psi.com.au>
Message-ID: <4222C7A0.7010307@po-box.mcgill.ca>

Alex Le Dain said unto the world upon 2005-02-27 19:54:
>  > Would this be for a GUI toolkit or maybe using a standard
>  > class scheme?
> 
> Sorry, yes I should have been more specific. I meant a non-GUI, standard 
> class scheme. I want to use the scheme to hold a structure in memory and 
> retrieve/add information to it.
> 
> I've had a couple of goes myself but get a bit confuesd about whether I 
> should use recursion to be able to get the children (and all 
> "sub"-children) of a/the parent.
> 
> cheers, Alex.
> 

Hi Alex,

I've been working on a set of tools for dealing with a tree structure.
I am no python expert -- in fact, the program I am working on is my
first serious us of classes. Anyway, though I've not been following
your thread, I also think that perhaps you might find the code I have
of some use. Use caution though; newbie code below :-)

I am working with a data format from a shareware application that puts
the tree in a flat text file, where each node has a header section,
including a unique node id and a level indicator. (Level 0 for the
root, level 1 for the roots children, etc.) My code is a work in
progress and not heavily tested, but it seems to work :-) I've a class
Tree_file with a .nodes attribute which is a list of Node objects (in
top-down tree order). It has a method:

.# leading periods to preserve indentation
.def update_family(self):
.    '''Starting from node, updates each nodes .children and
descendants set.'''
.    for node in self.nodes:
.        node.get_children(self)
.    for node in self.nodes:
.        node.get_descendants()

My Node class has methods giving each node object a node.id and
node.level (both ints). The other relevant attributes are
node.children, and node.descendants (both sets).
(I've got reasons to often process just a node's children, rather than
  all descendants; thus, it makes sense for my program to have the two
attributes.)

The two relevant methods are:

.def get_children(self, parent_file):
.    '''Sets the node's .children set attribute.
.
.    Scans the list of Node objects in parent_file.nodes until self
.    node is found (by comparison of node.id attributes). Then the
.    capture_children flag is set to True, and, for each node exactly
.    one node.level deeper, that deeper node is added to the
.    self.children set. This goes on until the first node not below
.    the self node is found.
.    '''
.    capture_children = False
.    children = set()
.
.    for node in parent_file.nodes:
.        if capture_children and not node.level > self.level:
.            break
.        if capture_children and node.level == self.level + 1:
.            children.add(node)
.        if self.id == node.id:
.            capture_children = True
.
.    self.children = children

and

.def get_descendants(self):
.    '''Updates each nodes .descendants set to current value.
.
.    Recursive call of get_descendants on a node's children, adding
.    all to the .descendants set (of the target node).
.    '''
.    descendants = self.children.copy()
.    for node in self.children:
.        node.get_descendants()
.        for n in node.descendants:
.            descendants.add(n)
.    self.descendants = descendants

Anyway, all caveats notwithstanding, I hope that is of some use to
you. Best,

Brian vdB




From kbk at shore.net  Wed Feb 16 00:32:36 2005
From: kbk at shore.net (Kurt B. Kaiser)
Date: Wed, 16 Feb 2005 00:32:36 -0500 (EST)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200502160532.j1G5Wahi031058@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  298 open (+14) /  2754 closed ( +6) /  3052 total (+20)
Bugs    :  823 open (+19) /  4829 closed (+17) /  5652 total (+36)
RFE     :  168 open ( +1) /   144 closed ( +2) /   312 total ( +3)

New / Reopened Patches
______________________

date.strptime and time.strptime as well  (2005-02-04)
       http://python.org/sf/1116362  opened by  Josh

NameError in cookielib domain check  (2005-02-04)
CLOSED http://python.org/sf/1116583  opened by  Chad Miller

Minor improvement on 1116583  (2005-02-06)
       http://python.org/sf/1117114  opened by  John J Lee

cookielib and cookies with special names  (2005-02-06)
       http://python.org/sf/1117339  opened by  John J Lee

cookielib LWPCookieJar and MozillaCookieJar exceptions  (2005-02-06)
       http://python.org/sf/1117398  opened by  John J Lee

cookielib.LWPCookieJar incorrectly loads value-less cookies  (2005-02-06)
       http://python.org/sf/1117454  opened by  John J Lee

urllib2 .getheaders attribute error  (2005-02-07)
       http://python.org/sf/1117588  opened by  Wummel

replace md5 impl. with one having a more free license  (2005-02-07)
CLOSED http://python.org/sf/1117961  opened by  Matthias Klose

unknown locale: lt_LT (patch)  (2005-02-08)
       http://python.org/sf/1118341  opened by  Nerijus Baliunas

Fix crash in xmlprase_GetInputContext in pyexpat.c  (2005-02-08)
       http://python.org/sf/1118602  opened by  Mathieu Fenniak

enable time + timedelta  (2005-02-08)
       http://python.org/sf/1118748  opened by  Josh

fix for a bug in Header.__unicode__()  (2005-02-09)
CLOSED http://python.org/sf/1119016  opened by  Bj?rn Lindqvist

python -c readlink()s and stat()s '-c'  (2005-02-09)
       http://python.org/sf/1119423  opened by  Brian Foley

patches to compile for AIX 4.1.x  (2005-02-09)
       http://python.org/sf/1119626  opened by  Stuart D. Gathman

better datetime support for xmlrpclib  (2005-02-10)
       http://python.org/sf/1120353  opened by  Fred L. Drake, Jr.

ZipFile.open - read-only file-like obj for files in archive  (2005-02-11)
       http://python.org/sf/1121142  opened by  Alan McIntyre

Reference count bug fix  (2005-02-12)
       http://python.org/sf/1121234  opened by  Michiel de Hoon

sha and md5 modules should use OpenSSL when possible  (2005-02-12)
       http://python.org/sf/1121611  opened by  Gregory P. Smith

Python memory allocator: Free memory  (2005-02-15)
       http://python.org/sf/1123430  opened by  Evan Jones

Patches Closed
______________

Add SSL certificate validation  (2005-02-03)
       http://python.org/sf/1115631  closed by  noonian

NameError in cookielib domain check  (2005-02-04)
       http://python.org/sf/1116583  closed by  rhettinger

replace md5 impl. with one having a more free license  (2005-02-07)
       http://python.org/sf/1117961  closed by  loewis

fix for a bug in Header.__unicode__()  (2005-02-09)
       http://python.org/sf/1119016  closed by  sonderblade

time.tzset() not built on Solaris  (2005-01-04)
       http://python.org/sf/1096244  closed by  bcannon

OSATerminology extension fix  (2004-06-25)
       http://python.org/sf/979784  closed by  jackjansen

New / Reopened Bugs
___________________

xmlrpclib: wrong decoding in '_stringify'  (2005-02-04)
CLOSED http://python.org/sf/1115989  opened by  Dieter Maurer

Prefix search is filesystem-centric  (2005-02-04)
       http://python.org/sf/1116520  opened by  Steve Holden

Wrong match with regex, non-greedy problem  (2005-02-05)
CLOSED http://python.org/sf/1116571  opened by  rengel

Solaris 10 fails to compile complexobject.c  (2005-02-04)
       http://python.org/sf/1116722  opened by  Case Van Horsen

Dictionary Evaluation Issue  (2005-02-05)
       http://python.org/sf/1117048  opened by  WalterBrunswick

Typo in list.sort() documentation  (2005-02-06)
CLOSED http://python.org/sf/1117063  opened by  Viktor Ferenczi

sgmllib.SGMLParser  (2005-02-06)
CLOSED http://python.org/sf/1117302  opened by  Paul Birnie

SimpleHTTPServer and mimetypes: almost together  (2005-02-06)
       http://python.org/sf/1117556  opened by  Matthew L Daniel

os.path.exists returns false negatives in MAC environments.  (2005-02-07)
       http://python.org/sf/1117601  opened by  Stephen Bennett

profiler: Bad return and Bad call errors with exceptions  (2005-02-06)
       http://python.org/sf/1117670  opened by  Matthew Mueller

"in" operator bug ?  (2005-02-07)
CLOSED http://python.org/sf/1117757  opened by  Andrea Bolzonella

BSDDB openhash   (2005-02-07)
       http://python.org/sf/1117761  opened by  Andrea Bolzonella

lists coupled  (2005-02-07)
CLOSED http://python.org/sf/1118101  opened by  chopf

Error in representation of complex numbers(again)  (2005-02-09)
       http://python.org/sf/1118729  opened by  George Yoshida

builtin file() vanishes  (2005-02-08)
CLOSED http://python.org/sf/1118977  opened by  Barry Alan Scott

Docs for set() omit constructor  (2005-02-09)
CLOSED http://python.org/sf/1119282  opened by  Kent Johnson

curses.initscr - initscr exit w/o env(TERM) set  (2005-02-09)
       http://python.org/sf/1119331  opened by  Jacob Lilly

xrange() builtin accepts keyword arg silently  (2005-02-09)
       http://python.org/sf/1119418  opened by  Martin Blais

Python Programming FAQ should be updated for Python 2.4  (2005-02-09)
       http://python.org/sf/1119439  opened by  Michael Hoffman

ScrolledText allows Frame.bbox to hide Text.bbox  (2005-02-09)
       http://python.org/sf/1119673  opened by  Drew Perttula

list extend() accepts args besides lists  (2005-02-09)
CLOSED http://python.org/sf/1119700  opened by  Dan Everhart

Static library incompatible with nptl  (2005-02-10)
       http://python.org/sf/1119860  opened by  daniel

Static library incompatible with nptl  (2005-02-10)
CLOSED http://python.org/sf/1119866  opened by  daniel

Python 2.4.0 crashes with a segfault, EXAMPLE ATTACHED  (2005-02-11)
       http://python.org/sf/1120452  opened by  Viktor Ferenczi

bug in unichr() documentation  (2005-02-11)
       http://python.org/sf/1120777  opened by  Marko Kreen

Problem in join function definition  (2005-02-11)
CLOSED http://python.org/sf/1120862  opened by  yseb

file seek error  (2005-02-11)
CLOSED http://python.org/sf/1121152  opened by  Richard Lawhorn

Python24.dll crashes, EXAMPLE ATTACHED  (2005-02-12)
       http://python.org/sf/1121201  opened by  Viktor Ferenczi

zip incorrectly and incompletely documented  (2005-02-12)
       http://python.org/sf/1121416  opened by  Alan

Decorated functions are unpickleable  (2005-02-12)
CLOSED http://python.org/sf/1121475  opened by  S Joshua Swamidass

distutils.dir_utils not unicode compatible  (2005-02-12)
       http://python.org/sf/1121494  opened by  Morten Lied Johansen

subprocess example missing "stdout=PIPE"  (2005-02-12)
       http://python.org/sf/1121579  opened by  Monte Davidoff

SMTPHandler argument misdescribed  (2005-02-13)
       http://python.org/sf/1121875  opened by  Peter

marshal may crash on truncated input  (2005-02-14)
       http://python.org/sf/1122301  opened by  Fredrik Lundh

incorrect handle of declaration in markupbase   (2005-02-14)
       http://python.org/sf/1122916  opened by  Wai Yip Tung

Typo in Curses-Function doc  (2005-02-15)
       http://python.org/sf/1123268  opened by  Aaron C. Spike

test_peepholer failing on HEAD  (2005-02-15)
CLOSED http://python.org/sf/1123354  opened by  Tim Peters

add SHA256/384/512 to lib  (2005-02-16)
       http://python.org/sf/1123660  opened by  paul rubin

Bugs Closed
___________

xmlrpclib: wrong decoding in '_stringify'  (2005-02-04)
       http://python.org/sf/1115989  closed by  fdrake

Wrong match with regex, non-greedy problem  (2005-02-05)
       http://python.org/sf/1116571  closed by  effbot

Typo in list.sort() documentation  (2005-02-05)
       http://python.org/sf/1117063  closed by  rhettinger

sgmllib.SGMLParser  (2005-02-06)
       http://python.org/sf/1117302  closed by  effbot

PyThreadState_SetAsyncExc segfault  (2004-11-18)
       http://python.org/sf/1069160  closed by  gvanrossum

"in" operator bug ?  (2005-02-07)
       http://python.org/sf/1117757  closed by  tim_one

lists coupled  (2005-02-07)
       http://python.org/sf/1118101  closed by  tim_one

builtin file() vanishes  (2005-02-09)
       http://python.org/sf/1118977  closed by  loewis

Docs for set() omit constructor  (2005-02-09)
       http://python.org/sf/1119282  closed by  rhettinger

list extend() accepts args besides lists  (2005-02-09)
       http://python.org/sf/1119700  closed by  rhettinger

Static library incompatible with nptl  (2005-02-10)
       http://python.org/sf/1119866  closed by  ekloef

Problem in join function definition  (2005-02-11)
       http://python.org/sf/1120862  closed by  rhettinger

file seek error  (2005-02-11)
       http://python.org/sf/1121152  closed by  tim_one

Decorated functions are unpickleable  (2005-02-12)
       http://python.org/sf/1121475  closed by  bcannon

"Macintosh" references in the docs need to be checked.  (2005-01-04)
       http://python.org/sf/1095802  closed by  bcannon

RE '*.?' cores if len of found string exceeds 10000  (2004-10-26)
       http://python.org/sf/1054564  closed by  effbot

missing mappings in locale tables  (2002-10-09)
       http://python.org/sf/620739  closed by  effbot

test_peepholer failing on HEAD  (2005-02-15)
       http://python.org/sf/1123354  closed by  tim_one

New / Reopened RFE
__________________

urllib.urlopen should put the http-error-code in .info()  (2005-02-07)
       http://python.org/sf/1117751  opened by  Robert Kiendl

Option to force variables to be declared  (2005-02-14)
       http://python.org/sf/1122279  opened by  Zac Evans

Line Numbers  (2005-02-14)
       http://python.org/sf/1122532  opened by  Egon Frerich

RFE Closed
__________

commands.mkarg function should be public  (2001-12-04)
       http://python.org/sf/489106  closed by  donut

Missing socketpair() function.  (2002-06-12)
       http://python.org/sf/567969  closed by  grahamh



From tzot at sil-tec.gr  Thu Feb 17 08:55:49 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 17 Feb 2005 15:55:49 +0200
Subject: check if object is number
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>	<374t0mF4te5vbU1@individual.net>	<7tOdnYs6NtrV7JDfRVn-vQ@powergate.ca>	<mLKdnbj4O4gQH5DfRVn-iA@comcast.com>	<mailman.2456.1108249466.22381.python-list@python.org>
	<tKidnT6fyKm_DpPfRVn-pA@comcast.com>
	<mailman.2459.1108252868.22381.python-list@python.org>
Message-ID: <2j89115tsnur135nfm06lh509482mdb16h@4ax.com>

On Sat, 12 Feb 2005 16:01:26 -0800, rumours say that Michael Spencer
<mahs at telcopartners.com> might have written:

>> Yup, that's basically what I'm doing right now.  The question was really 
>> how to define that adapter function. =)
>> 
>> Steve
>OK - then my entry is:
>	assert obj+1 >= 1
>:-)

So -1 is not a number.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From benjamin.cordes at blawrc.de  Mon Feb 14 07:02:01 2005
From: benjamin.cordes at blawrc.de (benjamin.cordes at blawrc.de)
Date: 14 Feb 2005 04:02:01 -0800
Subject: Problem with nested lists as arrays
Message-ID: <1108382521.266024.281620@g14g2000cwa.googlegroups.com>

Hello,

For a class modeling the block puzzle I use nested lists as arrays.
Within this class there is a method for swaping elements. I have lots
of trouble with that method but can't figure it out. It has probably to
do with my unuseful approach to nested lists, but I don't want to write
the code again. As I am a python newbie any other comments on the code
will be appreciated. Thanks for any help.

# Puzzle.py
# class for a sliding block puzzle

# an starting state of a 8-puzzle could look like the following:
# ------------
# | 7  2  4  |
# |          |
# | 5  X  6  |
# |          |
# | 8  3  1  |
# ------------

# the goal is to reach this state:
# ------------
# | X  1  2  |
# |          |
# | 3  4  5  |
# |          |
# | 6  7  8  |
# ------------

import copy

class Puzzle:

    def __init__(self, dim):
       self.dim = dim
       self.elements = [[0 for column in range(dim)] for row in
range(dim) ]


    def getEmptySlot(self):
        i = 0
        j = 0
        while i  <= self.dim-1:
            while j  <= self.dim-1:
                if self.elements[j][i] == -1:
                    return [j, i]
                j = j+1
            j = 0
            i = i + 1

    def performMove(self, direction):
        slot = self.getEmptySlot()

        if (direction == "up"):
            self.swapElements(slot[1], slot[0], slot[1]+1, slot[0])

        elif (direction == "down"):
            self.swapElements(slot[1], slot[0], slot[1]-1, slot[0])

        elif direction == "left":
            self.swapElements(slot[1], slot[0], slot[1], slot[0]-1)
        elif (direction == "right"):
            self.swapElements(slot[1], slot[0], slot[1], slot[0]+1)

    def swapElements(self, fromx, fromy, tox, toy):
        dummy = self.elements[toy][tox]

        self.elements[toy][tox] = self.elements[fromy][fromx]
        self.elements[fromy][fromx] = dummy

    def getPossibleMoves(self):
        emptySlot = self.getEmptySlot()
        y = emptySlot[1]
        x = emptySlot[0]
        north = (y == 0)
        south = (y == (self.dim-1))
        west = (x == 0)
        east = (x == (self.dim-1))

        middle = not(north or south or west or east)

        northwest = north and west
        northeast = north and east
        southwest = south and west
        southeast = south and east
        # orientation has to be distinct
        # save original values
        orignorth = north
        origsouth = south
        # original north or south
        orignors = north or south

        north = north and not (west or east)
        south = south and not (west or east)
        west = west and not (orignors)
        east = east and not (orignors)

        if middle:
            return ["up", "down", "left", "right"]
        elif north:
            return ["up", "left", "right"]
        elif south:
            return ["down", "left", "right"]
        elif west:
            return ["up", "down", "left"]
        elif east:
            return ["up", "down", "right"]
        elif northwest:
            return ["up", "left"]
        elif northeast:
            return ["up", "right"]
        elif southwest:
            return ["down", "left"]
        elif southeast:
            return ["down", "right"]
               
# ~Puzzle.py



From benjamin.cordes at blawrc.de  Mon Feb 14 12:06:30 2005
From: benjamin.cordes at blawrc.de (benjamin.cordes at blawrc.de)
Date: 14 Feb 2005 09:06:30 -0800
Subject: nested lists as arrays
In-Reply-To: <37bklfF5a7s7vU2@individual.net>
References: <1108384089.804375.179130@f14g2000cwb.googlegroups.com>
	<37bklfF5a7s7vU2@individual.net>
Message-ID: <1108400790.871727.29200@o13g2000cwo.googlegroups.com>


Diez B. Roggisch wrote:
> benjamin.cordes at blawrc.de wrote:
>
> > Hi,
> >
> > why can't I do this:
> >
> >         dummy = self.elements[toy][tox]
> >
> >         self.elements[toy][tox] = self.elements[fromy][fromx]
> >         self.elements[fromy][fromx] = dummy
> >
> > after initialising my nested list like this:
> >
> >        self.elements = [[0 for column in range(dim)] for row in
> > range(dim) ]
>
> Works for me:
>
> dim = 10
> elements = [[0 for column in xrange(dim)] for row in
> xrange(dim) ]
>
> toy, tox = (2,5)
> fromy, fromx = (7,5)
>
> dummy =elements[toy][tox]
> elements[toy][tox] = elements[fromy][fromx]
> elements[fromy][fromx] = dummy
>
>
> And use xrange instead of range.
> --
> Regards,
>
> Diez B. Roggisch

thanks so far, and sorry for posting the topic now 3 times.



From exogen at gmail.com  Fri Feb 18 20:27:15 2005
From: exogen at gmail.com (Brian Beck)
Date: Fri, 18 Feb 2005 20:27:15 -0500
Subject: [perl-python] exercise: partition a list by equivalence
In-Reply-To: <cv640l$11k$2@eeyore.INS.cwru.edu>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<cv63sg$11k$1@eeyore.INS.cwru.edu>
	<cv640l$11k$2@eeyore.INS.cwru.edu>
Message-ID: <cv64r2$2hv$1@eeyore.INS.cwru.edu>

Brian Beck wrote:
> Brian Beck wrote:
>  > [code]

Ah heck, nevermind... it worked for my small test cases but the 
algorithm is just wrong.

--
Brian Beck
Adventurer of the First Order


From tjreedy at udel.edu  Thu Feb 17 13:49:31 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 17 Feb 2005 13:49:31 -0500
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net> <421477D4.2050305@iinet.net.au>
Message-ID: <cv2oqg$mou$1@sea.gmane.org>


"Nick Coghlan" <ncoghlan at iinet.net.au> wrote in message 
news:421477D4.2050305 at iinet.net.au...
> This seems to be the last relevant message in the thread:
> http://mail.python.org/pipermail/python-dev/2004-August/048516.html

> So it was tried, but we found too many weird corner cases we weren't 
> quite sure
> what to do with. At that point, "explicit is better than implicit" kicked 
> in :)
> A shame, since it was both faster and more convenient than using a list 
> comp. But the convenience wasn't worth the ambiguity of the semantics.

Your experience, where you made an honest go of implementation, and the 
error catching argument, convince me that explicit is better for this case.

I was thinking, 'Well, print autoconverts' (as documented).  But it 
requires that each item be listed.  And if there is any ambiguity, no harm 
since it is only meant for quick convenience anyway and not exact 
char-by-char control.  Join, on the other hand, often gets a pre-existing 
list.  If that is known (thought to be) all strings, then mapping str is a 
waste as well as an error mask.  In not, map(str,...) is only 9 extra 
chars.

Terry J. Reedy






From fredrik at pythonware.com  Tue Feb  8 05:47:21 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 11:47:21 +0100
Subject: variable declaration
References: <1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com><MSGID_2=3A5025=2F3.131_4207fd24@fidonet.org><UmSNd.104914$Jk5.59261@lakeread01><4208178F.40804@po-box.mcgill.ca><cu9ask$r81$1@sea.gmane.org><mailman.2150.1107853621.22381.python-list@python.org>
	<cua11b$5nc$00$1@news.t-online.com>
Message-ID: <cua596$mlm$1@sea.gmane.org>

Peter Otten wrote:

>> executed. the compiler handles "global" and "from __future__", everything
>> else is done at runtime.
>
> and __debug__, too, it seems:

you left out the "python -O" line.

>>>> __debug__
> False
>>>> def f():
> ...     if __debug__:
> ...             global x
> ...     x = 42
> ...
>>>> f()
>>>> x
> Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
> NameError: name 'x' is not defined

yup, but unlike the two others, that's a CPython -O implementation issue.
(I'd say bug, in this case).

neither standard CPython (without -O) nor Jython behave this way.

</F> 





From tjreedy at udel.edu  Mon Feb 21 17:07:57 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 21 Feb 2005 17:07:57 -0500
Subject: python2.4 generator expression > python2.3 list expression
References: <mailman.2882.1108961815.22381.python-list@python.org><m2oeee5e2k.fsf@unique.fully.qualified.domain.name.yeah.right>
	<0ioj11dsgqhatqc3d7ldeb35rta6d9fk69@4ax.com>
Message-ID: <cvdltc$2b5$1@sea.gmane.org>


"Christos TZOTZIOY Georgiou" <tzot at sil-tec.gr> wrote in message 
news:0ioj11dsgqhatqc3d7ldeb35rta6d9fk69 at 4ax.com...
> On 21 Feb 2005 06:48:19 -0500, rumours say that Dan Sommers 
> <me at privacy.net>
>>for c in range( 128 ):
>>    even_odd = 0
>>    print '%3d' % c,
>>    while c:
>>        c &= c - 1
>>        even_odd = not even_odd
>>    print int( even_odd )
>
> Just for the sake of people who haven't messed with bit manipulation in C 
> or
> assembly, the effect of
> c &= c - 1
> is to reset the rightmost (less significant) '1' bit of a number (ie 
> change it
> to '0').

Cute.  I tried it a few times until I saw why it works.  But it is also 
dangerous (within a loop like the above) in a language like current Python 
(and unlike C/assembler) in which the binary representation of -1 is 
effectively a left infinite string of '1's: ...1111111111

Terry J. Reedy





From pierre.barbier at cirad.fr  Thu Feb  3 02:15:46 2005
From: pierre.barbier at cirad.fr (Pierre Barbier de Reuille)
Date: Thu, 03 Feb 2005 08:15:46 +0100
Subject: Redirecting stdout/err under win32 platform
In-Reply-To: <42000256$0$513$626a14ce@news.free.fr>
References: <41fbd6b5$0$6098$626a14ce@news.free.fr>
	<1107149696.809645.56180@z14g2000cwz.googlegroups.com>
	<42000256$0$513$626a14ce@news.free.fr>
Message-ID: <4201cf22$0$26608$636a15ce@news.free.fr>

David Douard a ?crit :
> Alan,
> 
> I did search Google for this problem (not enough, thou).
> In fact, I found some kind of solution (by myself, not that much on Google),
> but it is not really satisfactory.
> 
> I have used win32 pipes to do so (win32api.CreatePipe). I can redirect
> stdout/stderr to it from my python code (even redirecting the stdout/stderr
> from my C lib). 
> But I still have a problem with this solution (well, 2):
> - it is *much* more complicated than any solution available on Unix like
> systems (not really a problem, but),
> - it not synchronous at all. And I'd like it to be so (or almost so).
> 
> David
> 
> 
> 

AFAIK, there is no working bidirectionnal pipes on Windows ! The 
functions exists in order for them to claim being POSIX, but they're not 
working properly. Under Windows environment, I suppose you have to find 
your way using their buggy pipes (and by no means their "POSIX" pipes) 
or you have to use another inter-process communication protocol (DDE, 
COM, ...).

Pierre


From DrColombes at yahoo.com  Mon Feb 21 19:56:54 2005
From: DrColombes at yahoo.com (Dr. Colombes)
Date: 21 Feb 2005 16:56:54 -0800
Subject: MatPlotLib.MatLab troubles (how to install/run matplotlib.PyLab?)
Message-ID: <1109033814.888677.286240@c13g2000cwb.googlegroups.com>

On my home laptop computer, I'm trying to install the appropriate
modules so that  Python version 2.3.3 and IDLE version 1.0.2 (with an
"import matplotlib.matlab" statement) can produce nice MatLab-like
plots.

I have a matplotlib.matlab-capable Python set-up running OK on my
office desktop, which I obtained after downloading and installing a few
more modules (numarray and numeric, I think).

Now I get the following message about matplotlib.matlab being
deprecated:

-------------

matplotlib.matlab deprecated, please import matplotlib.pylab or simply
pylab instead.  See http://matplotlib.sf.net/matplotlib_to_pylab.py
for a script which explains this change and will automatically convert
your python scripts that use matplotlib.matlab.  This change was made
because we were concerned about trademark infringement on The
Mathwork's trademark of matlab.

---------------

Unfortunately, the above URL does not exist.

Thanks for suggestions, any help you can offer.



From steve at holdenweb.com  Wed Feb  2 16:59:00 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 02 Feb 2005 16:59:00 -0500
Subject: Basic file operation questions
In-Reply-To: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
References: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
Message-ID: <M7cMd.102637$Jk5.100959@lakeread01>

alex wrote:

> Hi,
> 
> I am a beginner with python and here is my first question:
> How can I read the contents of a file using a loop or something? I open
> the file with file=open(filename, 'r') and what to do then? Can I use
> something like
> 
> for xxx in file:
>    ....
> 
Yes, indeed you can. That's by no means *all* you can do, but to iterate 
over the lines of the file that will wrok exactly. Note that the lines 
will still have their terminating "\n" on the end, which is why the 
print statement inthe following example ends in a comma (this stops 
print from putting out its own newline).

  >>> f = file("test92.py", 'r')
  >>> for l in f:
  ...   print l,
  ...
import os.path

def getHomeDir():
     ''' Try to find user's home directory, otherwise return current 
directory.''
'
     try:
         path1=os.path.expanduser("~")
     except:
         path1=""
     try:
         path2=os.environ["HOME"]
     except:
         path2=""
     try:
         path3=os.environ["USERPROFILE"]
     except:
         path3=""

     if not os.path.exists(path1):
         if not os.path.exists(path2):
             if not os.path.exists(path3):
                 return os.getcwd()
             else: return path3
         else: return path2
     else: return path1

print getHomeDir()
  >>>

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005          http://www.python.org/pycon/2005/
Steve Holden                           http://www.holdenweb.com/


From timothy.grant at gmail.com  Wed Feb  2 15:55:22 2005
From: timothy.grant at gmail.com (Timothy Grant)
Date: Wed, 2 Feb 2005 12:55:22 -0800
Subject: Finding user's home dir
In-Reply-To: <5i9rtc.rq31.ln@orion.homeinvalid>
References: <5i9rtc.rq31.ln@orion.homeinvalid>
Message-ID: <e775286d050202125582f7469@mail.gmail.com>

On Wed, 02 Feb 2005 11:30:34 -0800 (PST), Nemesis
<nemesis at nowhere.invalid> wrote:
> Hi all, I'm trying to write a multiplatform function that tries to
> return the actual user home directory. I saw that
> os.path.expanduser("~") works on Linux but on Windows2000 (at least on
> the win I used) it returns %USERPROFILE%, so I tried os.environ["HOME"]
> and it gave me the same results. So I ended up with
> os.environ["USERPROFILE"], it doesn't work on Linux but (at least) on
> Windows2000 it returns the correct information
> 
> I googled a little bit and it seems that there is no general solution,
> so I tried to merge what I found, and I wrote this little function:
> 
> def getHomeDir():
>     ''' Try to find user's home directory, otherwise return current directory.'''
>     try:
>         path1=os.path.expanduser("~")
>     except:
>         path1=""
>     try:
>         path2=os.environ["HOME"]
>     except:
>         path2=""
>     try:
>         path3=os.environ["USERPROFILE"]
>     except:
>         path3=""
> 
>     if not os.path.exists(path1):
>         if not os.path.exists(path2):
>             if not os.path.exists(path3):
>                 return os.getcwd()
>             else: return path3
>         else: return path2
>     else: return path1
> 
> Please, could you test it on your systems and tell me what you got?
> I'd like to know what it returns on different operating systems because
> I'm developing a multiplatform software.
> 
> Thank you all.
> --
> Unauthorized amphibians will be toad away.
> 
>  |\ |       |HomePage   : http://nem01.altervista.org
>  | \|emesis |XPN (my nr): http://xpn.altervista.org
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

Works beautifully on my PowerBook running Mac OSX 10.3.7

/Users/timothygrant

-- 
Stand Fast,
    tjg.


From nick at craig-wood.com  Mon Feb 28 05:30:03 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 28 Feb 2005 10:30:03 GMT
Subject: accessor/mutator functions
References: <1109315698.002207.245690@g14g2000cwa.googlegroups.com>
	<mailman.3038.1109319115.22381.python-list@python.org>
Message-ID: <slrnd25qu6.cvr.nick@irishsea.home.craig-wood.com>

Michael Spencer <mahs at telcopartners.com> wrote:
>  mirandacascade at yahoo.com wrote:
> > When I look at how classes are set up in other languages (e.g. C++), I
> > often observe the following patterns:
> > 1) for each data member, the class will have an accessor member
> > function (a Get<whatever> function)
> > 2) for each data member, the class will have a mutator member function
> > (a Set<whatver> function)
> > 3) data members are never referenced directly; they are always
> > referenced with the accessor and mutator functions
> > 
> > My questions are:
> > a) Are the three things above considered pythonic?
> 
>  No
> 
> > b) What are the tradeoffs of using getattr() and setattr() rather than
> > creating accessor and mutator functions for each data member?
> 
>  Use property descriptors instead:
>  http://www.python.org/2.2.1/descrintro.html#property
>  http://users.rcn.com/python/download/Descriptor.htm#properties

Actually I would say just access the attribute directly for both get
and set, until it needs to do something special in which case use
property().

The reason why people fill their code up with boiler plate get/set
methods is to give them the flexibility to change the implementation
without having to change any of the users.  In python you just swap
from direct attribute access to using property().

Also note that with property() you can make an attribute read only (by
defining only the get method) which is often the encapsulation you
really want - and that is something you can't do in C++.

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


From john at grulic.org.ar  Wed Feb  9 22:54:09 2005
From: john at grulic.org.ar (John Lenton)
Date: Thu, 10 Feb 2005 00:54:09 -0300
Subject: PyQt and Python 2.4 - also WinXP LnF?
In-Reply-To: <1108003471.242829.297030@o13g2000cwo.googlegroups.com>
References: <1108003471.242829.297030@o13g2000cwo.googlegroups.com>
Message-ID: <20050210035409.GA13012@grulic.org.ar>

On Wed, Feb 09, 2005 at 06:44:31PM -0800, Simon John wrote:
> 
> I'm writing an XMMS remote control program, so it will be GPL when
> released (if it's ever good enough to release!) so I'm looking at
> buying the commercial PyQt3 or BlackAdder whilst waiting for the GPL
> PyQt4

may I observe that if you're writing anything to do with xmms, you
stick to plain ol' gtk1?

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
Hemos hallado al enemigo, y somos nosotros.
		-- Walt Kelly. 
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From danperl at rogers.com  Sun Feb  6 11:14:18 2005
From: danperl at rogers.com (Dan Perl)
Date: Sun, 6 Feb 2005 11:14:18 -0500
Subject: Confused with methods
References: <mailman.2022.1107703890.22381.python-list@python.org>
Message-ID: <TL-dneoHycPA35vfRVn-qQ@rogers.com>


"jfj" <jfj at freemail.gr> wrote in message 
news:mailman.2022.1107703890.22381.python-list at python.org...
>I don't understand.
> We can take a function and attach it to an object, and then call it
> as an instance method as long as it has at least one argument:
>
> #############
> class A:
>   pass
>
> def foo(x):
>   print x
>
> A.foo = foo
> a=A()
> a.foo()
> #############
>
> However this is not possible for another instance method:
>
> ############
> class A:
>  pass
>
> class B:
>  def foo(x,y)
>      print x,y
>
> b=B()
> A.foo = b.foo
> a=A()
>
> # error!!!
> a.foo()
> ##############
>
> Python complains that 'foo() takes exactly 2 arguments (1 given)'.
> But by calling "b.foo(1)" we prove that it is indeed a function which 
> takes
> exactly one argument.
>
> Isn't that inconsistent?

You called b.foo(1) but a.foo().  Note one argument in the first call and no 
arguments in the second call.  Would you have called a.foo(1), you would 
have gotten the same result as with b.foo(1).  I suppose that was just a 
small omission on your part, but what are you trying to do anyway?  It's a 
very strange use of instance methods. 




From mt at 3planes.com  Mon Feb  7 11:02:29 2005
From: mt at 3planes.com (Michael Tobis)
Date: 7 Feb 2005 08:02:29 -0800
Subject: declarations summary
In-Reply-To: <1grm033.wnee8f9w790oN%aleaxit@yahoo.com>
References: <1107750862.485179.61980@c13g2000cwb.googlegroups.com>
	<1grm033.wnee8f9w790oN%aleaxit@yahoo.com>
Message-ID: <1107792149.921100.212710@l41g2000cwc.googlegroups.com>


Alex Martelli wrote:
> Michael Tobis <mt at 3planes.com> wrote:
>    ...
> > .x = 1
> > .def foo():
> > .   if False:
> > .      global x
> > .   x = 2
> > .foo()
> > .print x
> >
> > prints "1"
>
> Wrong:

> >>> foo()
> >>> print x
> 2
>
> And indeed, that IS the problem.

Right. That's what I meant.

Sorry, that was a thinkographical error. 

mt



From mefjr75 at hotmail.com  Sun Feb 27 00:45:37 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 26 Feb 2005 21:45:37 -0800
Subject: Is it possible to pass a parameter by reference?
References: <mailman.3112.1109480634.22381.python-list@python.org>
Message-ID: <1109483137.798714.13330@g14g2000cwa.googlegroups.com>

Anthony Liu wrote:
> I defined two functions, f1 and f2.
>
> f1 modifies the value of a variable called apple.
>
> I want to pass the modified value of apple to f2.
>
> How can I do this?  I got stuck.


Py>def f1(apple):
...    apple += 1
...    f2(apple)

py>def f2(apple):
...    print 'you have %s apples' % apple

py>f1(4)
'you have 5 apples'
Read the docs this is pretty basic, it will save you time.
If in doubt try it out.
Use the interpreter, it is your friend.
hth,
M.E.Farmer



From tjreedy at udel.edu  Mon Feb 14 18:06:24 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 14 Feb 2005 18:06:24 -0500
Subject: nested lists as arrays
References: <1108384089.804375.179130@f14g2000cwb.googlegroups.com><42109efc$0$23451$626a14ce@news.free.fr>
	<1108402043.941832.34110@f14g2000cwb.googlegroups.com>
Message-ID: <curap1$drt$1@sea.gmane.org>


<benjamin.cordes at blawrc.de> wrote in message 
news:1108402043.941832.34110 at f14g2000cwb.googlegroups.com...
>    def setRandomState(self):
>       # container for the elements to pick from
>       container = [1,2,3,4,5,6,7,8,-1]
>
>       # create elements of puzzle randomly
>       i = 0
>       j = 0
>       while i <= self.dim-1:
>           while j <= self.dim-1:
>               if len(container) > 0:
>                   randomindex = random.randint(0,len(container)-1)
>                   self.elements[j][i] = container[randomindex]
>                   del container[randomindex]
>                   j=j+1
>               else:
>                   break
>           j=0
>           i=i+1

Without reading closely, I believe that the above can generate any possible 
position.  Are you aware that half are unsolvable?  If that matters, you 
need to either find a book or site that explains the parity test for 
solvability or generate the start position from the goal position by a 
series of random moves.

Terry J. Reedy






From francis.girard at free.fr  Tue Feb 15 16:35:15 2005
From: francis.girard at free.fr (Francis Girard)
Date: Tue, 15 Feb 2005 22:35:15 +0100
Subject: Iterator / Iteratable confusion
In-Reply-To: <curj01$1vk$1@sea.gmane.org>
References: <420a5c1e$0$21630$a1866201@visi.com>
	<200502142131.53265.francis.girard@free.fr>
	<curj01$1vk$1@sea.gmane.org>
Message-ID: <200502152235.18266.francis.girard@free.fr>

Le mardi 15 F??vrier 2005 02:26, Terry Reedy a ??crit??:
> "Francis Girard" <francis.girard at free.fr> wrote in message
> news:200502142131.53265.francis.girard at free.fr...
>
> (Note for oldtimer nitpickers: except where relevant, I intentionally
> ignore the old and now mostly obsolete pseudo-__getitem__-based iteration
> protocol here and in other posts.)
>
> Le dimanche 13 F?vrier 2005 23:58, Terry Reedy a ?crit :
> >> Iterators are a subgroup of iterables. Being able to say iter(it)
> >> without
> >> having to worry about whether 'it' is just an iterable or already an
> >> iterator is one of the nice features of the new iteration design.
> >
> >I have difficulties to represent an iterator as a subspecie of an
> >iteratable
>
> You are not the only one.  That is why I say it in plain English.
>
> You are perhaps thinking of 'iterable' as a collection of things.  But in
> Python, an 'iterable' is a broader and more abstract concept: anything with
> an __iter__ method that returns an iterator.
>

Yes, I certainly do define an "iteratable" as something _upon_ which you 
iterate (i.e. a container of elements). The iterator is something that serves 
the purpose to iterate _upon_ something else, i.e. the iteratable. For me, it 
makes little sense to iterate _upon_ an iterator. The fact that, in Python, 
both iterators and iteratables must support the __iter__ method is only an 
implementation detail. Concepts must come first.

> To make iterators a separate, disjoint species then requires that they not
> have an __iter__ method.  Some problems:
> A. This would mean either
>     1) We could not iterate with iterators, such as generators, which are
> *not* derived from iterables, or, less severely

Well, generators are a bit special as they are both (conceptually) iterators 
and iteratables by their very intimate nature -- since the elements are 
_produced_ as needed, i.e. only when you do iterate.
But as for ordinary iterators, I don't see any good conceptual reason why a 
generator-iterator should support the "__iter__" method. There might be other 
reasons though (for example related with the for ... in ... construct which I 
discuss later in this reply).

>     2) We would, usually, have to 'protect'  iter() calls with either
> hasattr(it, '__iter__') or try: iter(it)...except: pass with probably no
> net average time savings.

Well, I'm not interested in time savings for now. Only want to discuss more 
conceptual issues.

> B. This would prohibit self-reiterable objects, which require .__iter__ to
> (re)set the iteration/cursor variable(s) used by .next().

To sharply distinguish in code what is conceptually different is certainly 
very good and safe design in general. But what I am thinking about would not 
_prohibit_ it. Neitheir is C++ STL prohibiting it.

> C. There are compatibility issues not just just with classes using the old
> iteration protocol but also with classes with .next methods that do *not*
> raise StopIteration.  The presence of .__iter__ cleanly marks an object as
> one following the new iterable/iterator protocol.  Another language might
> accomplish the same flagging with inheritance from a base object, but that
> is not Python.
>
(That is not C++ templates either. See below.)

Why not "__next__" (or something else) instead of "next" for iterators and, 
yes, __iter__ for iteratables ?

> > [snip]...C++ STL where there is a clear (I resist to
> > say "clean") distinction between iteratable and iterator.
>
> leaves out self-iterating iterables -- collection objects with a .next
> method.  

Nope. See the definition of an iterator in C++ STL below. Anything respecting 
the standard protocol is an iterator. It might be the container itself. The 
point is that with the standard C++ STL protocol, you are not ___obliged___ 
to define an iterator as _also_ being an  iteratable. Both concepts are 
clearly separated.

> I am sure that this is a general, standard OO idiom and not a 
> Python-specific construct.  Perhaps, ignoring these, you would prefer the
> following nomenclature:
> iterob   = object with .__iter__
> iterable= iterob without .next
> iterator = iterob with .next
>
> Does STL allow/have iterators that are *not* tied to an iterable?

Yes of course. A "forward iterator", for example is _anything_ that supports 
the following :

===================
In what follows, we shall adopt the following convention.

X : A type that is a model of Trivial Iterator 
T : The value type of X 
x, y, y : Object of type X 
t : Object of type T 

Copy constructor : X(x) ------> X
Copy constructor : X x(y); or  X x = y;
Assignment : x = y [1]  ------> X& 
Swap : swap(x,y)  ------> void 

Equality : x == y ------> Convertible to bool
Inequality : x != y ------> Convertible to bool

Default constructor  : X x or X() ------> X
Dereference : *x  ------> Convertible to T 
Dereference assignment : *x = t ------> X is mutable
Member access : x->m [2] ------> T is a type for which x.m is defined 
======================

Anything that respects this convention is  a forward iterator. They might 
produce their own content as we iterate upon them if that's what is needed. 
They don't have to be a class inheriting from some another standard class. 
That's the beauty of C++ templates, forgetting (but not forgiving) its very 
ugly and complex syntax.

>
> >One of the result of not distinguishing them is that, at some point in
> >your
> >programming, you are not sure anymore if you have an iterator or an
> >iteratable ; and you might very well end up calling "iter()" or
> > "__iter__()" everywhere.
>
> If you iterate with a while loop just after creating a new iterable or
> iterator, then you probably do know which it is and can make the iter()
> call only if needed.  

Yes, true. But then you start factorize some code, and, then, oh well, you can 
see the difficulties.

> If you while-iterate with a function argument, then 
> iter() is a simpler way to be generic than the alternatives in A2 above.
>

You need that genereticity chiefly because you want to support both, iterators 
and iteratables in some argument place. I don't see any good reasons for this 
except historical ones (see for ... in ... constructs below). It might be 
preferable for a method to only accepts iterator if the only thing the method 
has to do with the iteratable is to iterate over it, and let the client of 
the method call "__iter__" or "iter()" if all he has is an iteratable (i.e. a 
container).


> >I am not concerned with the small performance issue involved here
>
> Good.  I think there are small.  The number and time for iterations is far
> more important.
>
> > (as I very seldom am) but with clarity. After all, why should you have to
> >
> >  > call __iter__ on an iterator you just constructed
>
> As I said above, you don't, and most people wouldn't.  The function
> implementing for loops does because *it*, unlike you, only sees the object
> passed and not the code that created the object!
>

As I said above, why should the function implementing for loops should accept 
anything other than an iterator (not iteratable), except, maybe, for 
historical reasons ?

> >I have a strong feeling that the problem arises from the difficulty to
> > marry the familiar ""for ... in ..."" construct with iterators. [snip]
>
> What difficulty?  For loops accept an iterable and iterate with the derived
> iterator.
>

The second argument place of the "for ... in ..." construct, _before_ the 
iteration protocol, had to be a container. At that time, it was the "for ... 
in ..." syntax construct that palyed the conceptual roles of both iteration 
and iterator. Now, the "for ... in ..." construct is the standard way to do 
iterate. Therefore, the second argument place of the "for ... in ..." must 
also be an iterator if we have to introduce iterators to Python. The question 
must had been, at the time iterators were introduced, "how should we manage 
to have these two different things in the same argument place ?" I think the 
Python solution to his dilemma is very acceptable. It is certainly the python 
way to be very polymorphic. But, at the same time, I can very well understand 
that a lot of person do have difficulties to swallow that an iterator should 
be a subspecie of an iteratable.


> Would you really prohibit the use of for loops with generators and other
> non-iterable-derived iterators?  See A1 above.

Of course not. This question reveals the difficulty I just pointed out.

>
> >To have iterators act as iteratables might very well had been a
> >
> > >compromise to solve the problem.
>
> I think it elegant.  See below.
>
> >I am not sure at all that this is a "nice feature" to consider an iterator
> >at
> >the same level that an iteratable.
>
> I think you are too stuck in the STL model.

Yes, very true. I just can't help thinking that iterators and iteratables are 
very different concepts.

>
> > It makes it a bit more akward to have the
> >"mind impulse", so to speak, to build iterators on top of other iterators
> >to > slightly modify the way iteration is done.
>
> On the contrary, what could be more elegant than
> def itermodifier(it):
>   for i in it: # where it is often an iterator
>      yield modification-of-i
> See the itertools module and docs and the examples of chaining iterators.
>

Yes, I certainly do think that generators are very, very, very elegant. I came 
back to python a lot because of their beauty, coupled with all the other 
advantages Python has to offer : simple syntax, well thought libraries, easy 
portability, pragmaticism, etc. (there's a long list).

On the other hand, I certainly do notice that the itertools module 
documentation says that all the functions defined there returns an iterator 
(not iteratable) but accepts iteratable. There is something akward about it 
for the beginner. You always have to re-think, oh ! yes ! they refer to the 
protocol, not the concepts.

But this is not that bad and I can certainly live with it.

(Thank you if you had the courage to read it all !)

Regards

Francis Girard

> Terry J. Reedy



From sjmachin at lexicon.net  Tue Feb  1 19:39:22 2005
From: sjmachin at lexicon.net (John Machin)
Date: 1 Feb 2005 16:39:22 -0800
Subject: Awkwardness of C API for making tuples
In-Reply-To: <dave.opstad-A95B15.15351801022005@reader0900.news.uu.net>
References: <dave.opstad-E4D4C4.07281701022005@reader0900.news.uu.net>
	<1107289261.185768.116790@f14g2000cwb.googlegroups.com>
	<dave.opstad-A95B15.15351801022005@reader0900.news.uu.net>
Message-ID: <1107304762.784406.111080@f14g2000cwb.googlegroups.com>


Dave Opstad wrote:
> In article <1107289261.185768.116790 at f14g2000cwb.googlegroups.com>,
>  "John Machin" <sjmachin at lexicon.net> wrote:
>
> > What is the purpose of this first loop?
>
> Error handling. If I can't successfully create all the PyInts then I
can
> dispose the ones I've made and not bother making the tuple at all.
> >
> > In what variable-length storage are you storing these (Python)
integers
> > during this first loop? Something you created with (a) PyMem_Malloc
(b)
> > malloc (c) alloca (d) your_own_malloc?
>
> (b) malloc. The sequence here is: 1) malloc; 2) check for malloc
> success; 3) loop to create PyInts (if failure, Py_DECREF those made
so
> far and free the malloc'ed buffer); 4) create new tuple (error checks

> again); and 5) PyTuple_SET_ITEM (no error checks needed)

Don't. If you _must_ allocate your own storage, use PyMem_Malloc.

>
> > 1. Determine the length of the required tuple; this may need a
loop,
> > but only to _count_ the number of C longs that you have.
> > 2. Use PyTuple_New.
> > 3. Loop to fill the tuple, using PyInt_FromLong and
PyTuple_SetItem.
>
> This would certainly be simpler, although I'm not sure I'm as clear
as
> to what happens if, say, in the middle of this loop a PyInt_FromLong
> fails. I know that PyTuple_SetItem steals the reference; does that
mean
> I could just Py_DECREF the tuple and all the pieces will be
> automagically freed? If so, I'll take your recommendation and rework
the
> logic this way.

This is what I believe happens. However even if you did need to do more
cleaning up, you shouldn't penalise the normal case i.e. when
PyInt_FromLong works. The only failure cause AFAIK is running out of
memory.
This should be rare unless it's triggered by your calling malloc :-)



From krivilli at ajato.com.br  Tue Feb 15 08:42:01 2005
From: krivilli at ajato.com.br (krivilli at ajato.com.br)
Date: Tue, 15 Feb 2005 14:42:01 +0100
Subject: Returned mail: see transcript for details
Message-ID: <200502151347.j1FDlfux016644@phoenix.szarvas.hu>



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From pekka.niiranen at wlanmail.com  Mon Feb 28 10:47:32 2005
From: pekka.niiranen at wlanmail.com (pekka niiranen)
Date: Mon, 28 Feb 2005 15:47:32 GMT
Subject: HELP: Python equivalent of UNIX command "touch"
Message-ID: <o2HUd.256$ac.161@read3.inet.fi>

Does anybody know Python recipe for changing the date
of the directory or files in W2K to current date and time?
In UNIX shell command "touch" does it.

-pekka-


From aleaxit at yahoo.com  Sun Feb  6 18:16:07 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 7 Feb 2005 00:16:07 +0100
Subject: string issue
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
	<36QMd.103084$Jk5.36127@lakeread01>
	<cu0j92$kf7$2@solaris.cc.vt.edu>
	<mailman.1913.1107547130.22381.python-list@python.org>
Message-ID: <1grl717.1o4ofg7arp8c2N%aleaxit@yahoo.com>

Bill Mill <bill.mill at gmail.com> wrote:
   ...
> > > You are modifying the list as you iterate over it. Instead, iterate over
> > > a copy by using:
> > >
> > > for ip in ips[:]:
   ...
> Once you know it, it's neat, and I use it sometimes. However, it's a
> little too "magical" for my tastes; I'd rather be more explicit about
> what's going on.

Using ips[:] to make a copy on the fly is very idiomatic, but I've never
liked it, personally.  I see no reason to prefer it to the even shorter
and arguably less obscure ips*1, for example.  My preference is:

  for ip in list(ips):


Alex


From tzot at sil-tec.gr  Mon Feb 21 10:30:42 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Mon, 21 Feb 2005 17:30:42 +0200
Subject: [ANN] Python 2.4 Quick Reference available
References: <cv79sj$mgk$1@aphrodite.grec.isp.9tel.net>	<1108831318.290846.5930@z14g2000cwz.googlegroups.com>	<qnkll9kv09y.fsf@arbutus.physics.mcmaster.ca>	<37qaleF5gd7bcU1@individual.net>
	<421898CD.6040408@iinet.net.au>
	<mailman.2863.1108909421.22381.python-list@python.org>
	<cva8gd$3v7$1@gemini.csx.cam.ac.uk>
Message-ID: <l1vj11hcuvhq7kt3qbk1dbeq02bouf409n@4ax.com>

On Sun, 20 Feb 2005 14:57:14 +0000, rumours say that Michael Hoffman
<cam.ac.uk at mh391.invalid> might have written:

[snip: use 'open' in preference to 'file']

>To be honest I doubt open will be extended in this manner. I can see
>the Pythoneers adding, say, a keyword argument to open to allow a URL
>instead, but just changing the current behavior would be too risky. Plus,
>what happens if I have a file named "http://www.python.org/"?

I don't know in what filesystem you can have such a file name [1].  Slashes
('/') you can (kind of) get away with using \u2215 (DIVISION SLASH) on NTFS or
on UTF-8 encoded *nix filenames, but I haven't found a replacement for colon
(':').  Using similar glyphs, of course, invalidates the URL...


[1] Unless you mean it as a *path name*, which /could/ exist on *nix filesystems
(normalised to a directory called 'www.python.org' in the local subdirectory
'http:'), but still could not on NTFS.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From steven.bethard at gmail.com  Thu Feb 10 12:29:38 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 10 Feb 2005 10:29:38 -0700
Subject: empty classes as c structs?
In-Reply-To: <1grrgjh.ntgjzn167kxpyN%aleaxit@yahoo.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>
	<mailman.1973.1107618702.22381.python-list@python.org>
	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>
	<mailman.2006.1107658273.22381.python-list@python.org>
	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>
	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>
	<mailman.2049.1107750700.22381.python-list@python.org>
	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com>
	<4207606E.4040806@iinet.net.au> <cu8amb$ufa$1@sea.gmane.org>
	<mailman.2158.1107859833.22381.python-list@python.org>
	<1grnyld.1t8l5kw1nr5aqsN%aleaxit@yahoo.com>
	<E7CdnTFdo5S8AZffRVn-og@comcast.com>
	<1grqs37.1sjjd0b162e5z4N%aleaxit@yahoo.com>
	<H4ednd10C8QmP5ffRVn-tw@comcast.com>
	<1grrgjh.ntgjzn167kxpyN%aleaxit@yahoo.com>
Message-ID: <FsKdnXzNP8JiBJbfRVn-jw@comcast.com>

Alex Martelli wrote:
> Steven Bethard <steven.bethard at gmail.com> wrote:
>>I like the idea of chain, though, so I'll probably add the class with
>>just __init__ and __getattribute__ to the current implementation.  I'm
>>willing to be persuaded, of course, but for the moment, since I can see
>>a few different options, I'm refusing the temptation to guess on the 
>>"most natural" behavior for __delattr__ and __setattr__...  =)
> 
> 
> That's probably best in terms of API.  Not too sure about the
> implementation (why wouldn't __getattr__ suffice, holding the bunches in
> an attribute with a magicname?) but that's a secondary issue.

Yeah, I had it written with __getattr__ at first...  Not sure why I 
switched over... ;)  I'll probably switch it back.

Steve


From spam at nospam.org  Thu Feb 10 17:25:45 2005
From: spam at nospam.org (Erik Johnson)
Date: Thu, 10 Feb 2005 15:25:45 -0700
Subject: Tkinter.Canvas saved as JPEG?
Message-ID: <420bdd36$1@nntp.zianet.com>


    I want to draw some simple (dynamic) graphs and get these saved as a
JPEG file to reference in a web link.  I am aware of  PIL (Python Image
Library), but unfortunatley my system does not have it built. After looking
at the README for it and seeing it depends on two separate packages to
support JPEG and TrueType font, I though maybe there was an easier way.

    Tkinter is currently built and working on my Python 2.2.2 installation.
Is there some simple path to take a Tkinter.Canvas with some stuff drawn on
it and get it into a file as a JPEG (without anything from PIL, preferably
just using standard libraries)? (I have John Grayson's book. I haven't read
the whole thing but I'm not having much luck readily finding a way to do
this, though it may be there somewhere. Feel free to cite page numbers there
if that helps.)

Thanks for taking the time to read my post. :)

-ej




From gmane-schpam at joefrancia.com  Wed Feb 16 17:04:30 2005
From: gmane-schpam at joefrancia.com (Joe Francia)
Date: Wed, 16 Feb 2005 17:04:30 -0500
Subject: Multiple initialization methods?
References: <1108589491.301007.174370@z14g2000cwz.googlegroups.com>
Message-ID: <opsma8xsk4pvslz3@scaba>

On 16 Feb 2005 13:31:31 -0800, alex <alexander.dietz at mpi-hd.mpg.de> wrote:

> Hi,
>
> it is possible to define multiple initialization methods so that the
> method is used that fits?
>
> I am thinking of something like this:
>
>   def __init__(self, par1, par2):
>     self.init(par1, par2);
>
>   def __init__(self, par1):
>     self.init(par1, None)
>
>   def init(self, par1, par2):
>      ...
>      ...
>
> So if the call is with one parameter only the second class is executed
> (calling the 'init' method with the second parameter set to 'None' or
> whatever. But this example does not work.
>
> How to get it work?
>
> Alex
>

You can do this:

def __init__(self, *args, **kwargs):
   #args is a tuple of positional args
   #kwargs is a dict of named args
   print args, kwargs
   #real code here instead of lame print statements
   try:
     self.name = args[0]
   except IndexError:
     self.name = ''
   self.occupation = kwargs.get('occupation', '')

or even better, do this:

def __init__(self, name='', occuaption='', age=0):
   #named args with default values
   self.name = name
   self.occupation = occupation
   self.age = age

Based on this, you should have enough information to make your class work.

-- 
Soraia: http://www.soraia.com/



From dr_rave at hotmail.com  Tue Feb 15 18:03:45 2005
From: dr_rave at hotmail.com (Roch ....)
Date: Tue, 15 Feb 2005 23:03:45 +0000
Subject: Compiler
In-Reply-To: <420990CF.7000705@ocf.berkeley.edu>
Message-ID: <BAY102-F16C2D5E48CA8D5293EEE2C866B0@phx.gbl>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20050215/c3bb309d/attachment.html>

From tim.golden at viacom-outdoor.co.uk  Tue Feb  8 06:05:56 2005
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 8 Feb 2005 11:05:56 -0000 
Subject: re-entrancy question
Message-ID: <9A28C052FF32734DACB0A288A3533991035A68@vogbs009.gb.vo.local>

[apocalypznow]

| I have a program that instantiates some objects and runs a main loop. 
| Before the main loop starts, I create a thread that listens to TCP 
| connections on a port.  If any connections are made, and depending on 
| the data, I call methods on some of those objects.
| 
| I am worried that calling methods on objects from outside the 
| main loop, 
| but that are also operated on in the main loop, could cause problems.
| 
| My questions:
| 1) is this safe?
| 2) what kind of problems could occur?
| 3) how do I safely handle this?

No doubt there are more pertinent answers, but unless this is
a learning exercise, you'd be better off investigating Pyro:
http://pyro.sf.net

TJG

(And, thinking about it, even if this is a learning exercise)

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________


From duncan.booth at invalid.invalid  Thu Feb 17 12:11:33 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 17 Feb 2005 17:11:33 GMT
Subject: difference between class methods and instance methods
References: <pan.2005.02.17.07.04.37.907754@yahooz.com>
	<Xns96005FE3164DAduncanrcpcouk@127.0.0.1>
	<1119g2rre5g610c@corp.supernews.com>
	<37juh3F5d511mU1@individual.net>
Message-ID: <Xns9600AE4FC946duncanrcpcouk@127.0.0.1>

Diez B. Roggisch wrote:

> John wrote:
>> ... hmm... bound methods get created each time you make
>> a call to an instance method via an instance of the given class?
> 
> No, they get created when you create an actual instance of an object.
> So only at construction time. Creating them means taking the unbound
> method and binding the created object as first argument to the method.
> Thus each instance of a class Foo with a method bar has its own
> instance of bar - the bound method bar. But only one per object. 
> 
> 
This is badly wrong. John was correct.

Bound methods get created whenever you reference a method of an instance. 
If you are calling the method then the bound method is destroyed as soon as 
the call returns. You can have as many different bound methods created from 
the same unbound method and the same instance as you want:

>>> inst = C()
>>> f1 = inst.foo
>>> f2 = inst.foo
>>> f1, f2
(<bound method C.foo of <__main__.C instance at 0x00B03F58>>, <bound method 
C.foo of <__main__.C instance at 0x00B03F58>>)
>>> f1 is f2
False
>>> f1 is inst.foo
False
>>> 

Every reference to inst.foo is a new bound method.


From steven.bethard at gmail.com  Mon Feb  7 16:35:35 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 07 Feb 2005 14:35:35 -0700
Subject: returning True, False or None
In-Reply-To: <v%QNd.21132$lB4.569880@twister1.libero.it>
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
	<1107573625.439409.100870@o13g2000cwo.googlegroups.com>
	<1107574705.956498.219490@c13g2000cwb.googlegroups.com>
	<v%QNd.21132$lB4.569880@twister1.libero.it>
Message-ID: <-cSdndTQycC_QprfRVn-sQ@comcast.com>

Matteo Dell'Amico wrote:
> Since a function that doesn't return is equivalent to one that returns 
> None, you can write it as:
> 
>  >>> def doit(lst):
> ...     s = set(lst) - set([None])
> ...     if s: return max(s)
> 
> that looks to me as the most elegant so far, but this is just because 
> it's mine :-)

Cool.  I prefer to be explicit about returns (e.g. not counting on the 
automatic return None), and I'd rather not create the unnecessary None 
set, so I would probably write this like:

py> def f(lst):
...     s = set(lst)
...     s.discard(None)
...     if s:
...         return max(s)
...     else:
...         return None
...

But it's definitely a very elegant solution.  Thanks!

Steve


From tim.peters at gmail.com  Tue Feb  1 11:52:08 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Tue, 1 Feb 2005 11:52:08 -0500
Subject: pythonic equivalent of Mathematica's FixedPoint function
In-Reply-To: <1107273234.276714.272890@z14g2000cwz.googlegroups.com>
References: <1107273234.276714.272890@z14g2000cwz.googlegroups.com>
Message-ID: <1f7befae050201085271976dc@mail.gmail.com>

[jelle]
> I now some hostility to functional programming is flaming up now and
> then; still could someone suggest me a pythonic equivalent for
> Mathematica's FixedPoint function? For those not familiar with
> Mathematica:
>
> FixedPoint[f, expr] starts with expr, then applies f repeatedly until
> the result no longer changes.

If that's all there is to it, sounds like a simple loop:

def FixedPoint(f, expr):
    old = expr
    while True:
        new = f(old)
        if old == new:
            return new
        old = new

Then, e.g.,

>>> FixedPoint(lambda x: (x + 25/x)/2, 400)
5

But I bet there's more to it than just that (e.g., maybe an optional
limit on max # of iterations; maybe a way to terminate on "approximate
equality").  As-is, that function is very prone to falling into an
infinite loop.

[and later]
> doh...
>
> https://sourceforge.net/projects/fixedpoint

Nope, that has to do with decimal arithmetic using a fixed number of
decimal digits after the decimal point ("fixed-point decimal").


From nick at craig-wood.com  Fri Feb 11 13:30:02 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 11 Feb 2005 18:30:02 GMT
Subject: goto, cls, wait  commands
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
	<420b89f2$0$21601$a1866201@visi.com>
	<420ba000$0$29241$626a14ce@news.free.fr>
	<420ba879$0$29513$a1866201@visi.com>
Message-ID: <slrnd0ps6j.d8g.nick@irishsea.home.craig-wood.com>

Grant Edwards <grante at visi.com> wrote:
>  I forgot to mention try/except.  When I do use goto in C
>  programming it's almost always to impliment what would have
>  been a try/except block in Python.

Yes I'd agree with that.  No more 'goto out'.

There is this also

    for (i = 0; ...)
    {
        if (something)
            goto found;
    }
    /* do stuff when not found */
    found:;

(yes I hate setting flags in loops ;-)

This translates exactly to the for: else: construct

    for i in xrange(...):
        if something:
            break
    else:
        # do stuff when not found

The last language I saw with this very useful feature was FORTH in
about 1984!

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


From chaotrope at jps.net  Mon Feb 21 12:42:35 2005
From: chaotrope at jps.net (kim kubik)
Date: Mon, 21 Feb 2005 17:42:35 GMT
Subject: IDLE Problem: win98\Python2.4
References: <22eSd.1969$MY6.1483@newsread1.news.pas.earthlink.net>
	<1109004976.267201.200950@z14g2000cwz.googlegroups.com>
Message-ID: <f4pSd.2168$MY6.396@newsread1.news.pas.earthlink.net>


>   kim kubik wrote:
> > I installed Python2.4 in Win98
> > and IDLE doesn't work

> Are you also running Ruby? The Ruby bundle for MS Windows has caused
> problems with it's TCL package conflicting with Python's.
>
thanks, one of the first things I noted in the error msg
(not included for brevity) was that the ruby search
path in AUTOEXEC.BAT was ahead of the python path (and
ruby had tcl83.lib) so I REM'd all the tcl stuff out.
AND THEN (stupid me!) I put into AUTOEXEC.BAT
'set TCL_LIBRARY=c:\python23\tcl'  thinking that
would point python to the proper libs. What a mistake!
If I take that line out (and leave the ruby stuff REM'd
out as well) IDLE runs just fine. So thanks!

A little knowledge is indeed a dangerous thing; forgive my
stupidity - it will happen again, so I'm apologizing in advance!
\kim




From alan.mcintyre at esrgtech.com  Fri Feb  4 14:40:27 2005
From: alan.mcintyre at esrgtech.com (Alan McIntyre)
Date: Fri, 04 Feb 2005 14:40:27 -0500
Subject: string issue
In-Reply-To: <36QMd.103084$Jk5.36127@lakeread01>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
	<36QMd.103084$Jk5.36127@lakeread01>
Message-ID: <LcQMd.33664$EG1.12155@lakeread04>

Wow, that's cool; I'd never seen that before. :)  Thanks, Steve..

Steve Holden wrote:
> You are modifying the list as you iterate over it. Instead, iterate over 
> a copy by using:
> 
> for ip in ips[:]:
>   ...
> 
> regards
>  Steve


From martin at v.loewis.de  Sun Feb 20 04:40:21 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 20 Feb 2005 10:40:21 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cv7i57$d0v$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr>
Message-ID: <42185b05$0$15460$9b622d9e@news.freenet.de>

Ilias Lazaridis wrote:
> Should a professional developer take python serious?

Yes.

Regards,
Martin


From duncan.booth at invalid.invalid  Thu Feb 10 09:20:57 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 10 Feb 2005 14:20:57 GMT
Subject: That horrible regexp idiom
References: <3e8ca5c805020923107c36cd7f@mail.gmail.com>
	<mailman.2311.1108043184.22381.python-list@python.org>
Message-ID: <Xns95F991C538FC3duncanrcpcouk@127.0.0.1>

Nick Coghlan wrote:

> I knew if/elif was a much better argument in favour of embedded
> assignment than while loops are.
> 

I know I'm going to regret posting this, but here is an alternative, very 
hackish way to do all those things people keep asking for, like setting 
variables in outer scopes or doing lots of nested ifs for regex matching or 
simulating passing a local variable by reference.

My excuse for the following code is that was unwell and I think I was 
slightly feverish when I wrote it:

----- hack.py -----------
import new

def mksetter(baa):
    '''Cruel hack to set scoped variables.
    baa should be a lambda which accesses the variable you wish to set.
    It must be a local or outer scope variable, not a global
    '''
    closure = baa.func_closure
    name = baa.func_code.co_names[0]
    if not isinstance(closure, tuple) or len(closure) != 1:
        raise TypeError('''mksetter() argument must be a lambda accessing a 
local or scoped variable''')

    def f(v):
        a = v
        return v
        lambda: a

    c = f.func_code
    newcode = new.code(
        c.co_argcount, 1, c.co_stacksize, c.co_flags, c.co_code,
        c.co_consts, c.co_names, c.co_varnames, c.co_filename, 'set_'+name,
        c.co_firstlineno, c.co_lnotab, (name,), (),
        )
    return new.function(newcode, f.func_globals,
        'set_'+name, None, closure)

if __name__=='__main__':
    def set_a_local():
        a = 42
        print "a=",a
        set_a = mksetter(lambda: a)
        set_a(24)
        print set_a
        print "a=",a

    set_a_local()

    def set_scoped():
        count = 0
        set_count = mksetter(lambda: count)
        def inc():
            set_count(count+1)
        for i in range(10):
            print "count=",count
            inc()
        print "Final value",count

    set_scoped()

    import re
    def silly_regex():
        name = re.compile('[a-zA-Z_][a-zA-Z0-9_]*')
        number = re.compile('[0-9]+(\\.[0-9]*)?([eE][-+]?[0-9]+)?')

        m = None
        set_m = mksetter(lambda: m)

        for s in 'abc', '2.5e-3', '!':
            if set_m(name.match(s)):
                print "name", m.group(0)
            elif set_m(number.match(s)):
                print "number", m.group(0)
            else:
                print "no match", m, s

    silly_regex()

----- end of hack.py ----

Sorry.

If anyone actually feels tempted to use this: I take no responsibility for 
the results. I can't particularly see why future versions of Python would 
change to stop it working, but they could, and of course it is definitely a 
'C-Python only' trick.




From richie at entrian.com  Thu Feb 10 04:01:09 2005
From: richie at entrian.com (Richie Hindle)
Date: Thu, 10 Feb 2005 09:01:09 +0000
Subject: Is Python as capable as Perl for sysadmin work?
In-Reply-To: <cue6d5$vn6$1@news.freedom2surf.net>
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
	<mailman.2204.1107885796.22381.python-list@python.org>
	<cue6d5$vn6$1@news.freedom2surf.net>
Message-ID: <6b8m01tcr3p7p7dq3beekj7q1fgmt9qubr@4ax.com>


[Steve]
> Was it INTERCAL that had the COMEFROM <Line number> statement instead of
> GOTO? I REALLY like the idea of a COMEFROM statement. I think python should
> have a COMEFROM statement

It does - see http://entrian.com/goto/

(In case you doubt it: yes, it works, but note that it doesn't work at the
interactive prompt, only in a real source file.)

(The fact that I felt obliged to add the first paragraph on that page is
the funniest part of the whole thing.  I really did have people genuinely
thanking me for the module, asking for features, asking for help with
using it, and so on.)

-- 
Richie Hindle
richie at entrian.com



From exogen at gmail.com  Sun Feb 13 16:43:29 2005
From: exogen at gmail.com (Brian Beck)
Date: Sun, 13 Feb 2005 16:43:29 -0500
Subject: builtin functions for and and or?
In-Reply-To: <cuohlp$ev8$1@eeyore.INS.cwru.edu>
References: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>
	<cuohlp$ev8$1@eeyore.INS.cwru.edu>
Message-ID: <cuohrj$gj2$1@eeyore.INS.cwru.edu>

Brian Beck wrote:
> def all(seq, pred=bool):
>     "Returns True if pred(x) is True for every element in the iterable"
>     for elem in ifilterfalse(pred, seq):
>         return False
>     return True
> 
> def any(seq, pred=bool):
>     "Returns True if pred(x) is True for at least one element in the 
> iterable"
>     for elem in ifilter(pred, seq):
>         return True
>     return False

I should probably note, you'll have to

from itertools import ifilter, ifilterfalse

to use these.

--
Brian Beck
Adventurer of the First Order


From cjw at sympatico.ca  Wed Feb 16 13:36:31 2005
From: cjw at sympatico.ca (Colin J. Williams)
Date: Wed, 16 Feb 2005 13:36:31 -0500
Subject: Can __new__ prevent __init__ from being called?
In-Reply-To: <87acq5tos7.fsf@news2.ososo.de>
References: <87is4tldea.fsf@news2.ososo.de>
	<3LOdncHRa6C77I_fRVn-rA@comcast.com>
	<87acq5tos7.fsf@news2.ososo.de>
Message-ID: <MoMQd.14133$4I5.775533@news20.bellglobal.com>

Felix Wiemann wrote:
> Steven Bethard wrote:
> 
> 
>>Felix Wiemann wrote:
>>
>>
>>>How can I prevent __init__ from being called on the
>>>already-initialized object?
>>
>>The short answer: you can't:
>>     http://www.python.org/2.2.3/descrintro.html#__new__
> 
[snip]
This prompts a similar query.  __new__ appears to be intended for 
immutable objects but it seems to be called as part of constructor 
process for all instances.

Regarding the original question.  It is not possible to prevent the use 
of __init__ but is it possible to prevent __init__ having any effect by 
setting a flag when __init__ is called for the first creation of the 
instance.

Colin W.
> 


From claird at lairds.us  Mon Feb 14 13:08:04 2005
From: claird at lairds.us (Cameron Laird)
Date: Mon, 14 Feb 2005 18:08:04 GMT
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr> <37bkemF5a7s7vU1@individual.net>
Message-ID: <uc37e2-m6i.ln1@lairds.us>

In article <37bkemF5a7s7vU1 at individual.net>,
Diez B. Roggisch <deetsNOSPAM at web.de> wrote:
>> One of the most funny things within open-source is that switching:
>> 
>> first:
>> "we have powerfull solutions which beat this and that"
>> 
>> then:
>> "hey, this is just volunteer work"
>> 
>
>I don't see the contradiction here. It beats a great deal of commercial
>solutions in a lot of ways. But not on every single one of these. And the
>_reason_ for beating commercial software in certain aspects is exactly that
>somebody stood up and volunteered. Obviously you aren't interested in the
>more labour-intensive parts of the os-development.
>
>> 
>> But if those answers above were of official nature, I must seriously
>> rethink if I can rely on _any_ system which is based on python, as the
>> foundation and the community do not care about essential needs and
>> requirements.
>
>They might not care about _your_ perceived essential needs. But as lots of
>people use python and python based solutions with great commercial success,
>you might think of reviewing your needs more critical. After all, there is
>no _perfect_ system for all needs.
			.
			.
			.
Me, too.  On the off-chance that a naive passerby is misled by
parts of this thread, I'll point out that ... well, if the
alternative to Python, say, is commercial products which are to
be judged on how much they "care about essential needs and
requirements" of *users* ...

Nope, 'can't do it.  I can't finish that sentence with a straight
face.


From apardon at forel.vub.ac.be  Mon Feb  7 10:32:41 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 7 Feb 2005 15:32:41 GMT
Subject: Confused with methods
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>
	<slrnd0enor.26q.apardon@rcpc42.vub.ac.be>
	<1grmd4z.1tlm4e61650vedN%aleaxit@yahoo.com>
	<slrnd0f07t.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2074.1107789846.22381.python-list@python.org>
Message-ID: <slrnd0f2gp.26q.apardon@rcpc42.vub.ac.be>

Op 2005-02-07, John Lenton schreef <john at grulic.org.ar>:
>
>
> --cvVnyQ+4j833TQvp
> Content-Type: text/plain; charset=us-ascii
> Content-Disposition: inline
> Content-Transfer-Encoding: quoted-printable
>
> On Mon, Feb 07, 2005 at 02:53:49PM +0000, Antoon Pardon wrote:
>> The fact that a function in a class performs a lot of magic if
>> it is called through an instance, that isn't performed otherwise,
>> makes python inconsistent here. You may like the arrangement
>> (and it isn't such a big deal IMO) but that doesn't make it consistent.
>
> I vote for accepting the fact (it goes with the "practicality beats
> purity" bit,

But before one can produce the "practicality beats purity" argument,
one has to accept this isn't pure. That was all I was saying here,
python is not consistent/pure here. Now there can be good arguments
to have this that offset the inconsistency, but the python people
shouldn't then try to argue that it is consistent anyway.

> because otherwise all our methods would have to start
> with an @instancemethod). This doesn't justify (IMVVHO) a new keyword,
> like you (was it you?) seemed to imply (do you really mean for
> instancemethod (or somesuch) and classmethod to become keywords?). I
> think it's fine the way it is: there's an implicit @instancemethod,
> and @staticmethod (which you'd have be the default if I read you
> right) has to be explicit, when in classes.

I'm not saying I would have it so, I'm saying that would be the
pure/consistent way to do it.

-- 
Antoon Pardon


From steven.bethard at gmail.com  Mon Feb  7 18:39:56 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 07 Feb 2005 16:39:56 -0700
Subject: def __init__ question in a class definition rephrased
In-Reply-To: <mailman.2116.1107817179.22381.python-list@python.org>
References: <mailman.2116.1107817179.22381.python-list@python.org>
Message-ID: <Lr-dnX7JpqvaYZrfRVn-ug@comcast.com>

Jeffrey Borkent wrote:
> what is the significance ( if any ) of the __ in these self.xxxxxx
> assignments.

Variables with preceding __ are a vague attempt to avoid some types of 
name collisions in inheritance hierarchies.  Any name that starts with a 
__ will be mangled by prefixing it with _<class-name>:

py> class C(object):
...     def __init__(self, x):
...         self.__type = type(x)
...         self.x = x
...
py> C(1).__dict__
{'_C__type': <type 'int'>, 'x': 1}
py> class D(C):
...     def __init__(self, x):
...         super(D, self).__init__(x)
...         self.__type = D
...
py> D(1).__dict__
{'_C__type': <type 'int'>, 'x': 1, '_D__type': <class '__main__.D'>}

Note that the D object has two different __type attributes -- one 
mangled for type C and one mangled for type D.

While the intent of __ variables is to allow you to not worry about the 
names given to "private" attributes of a class when you inherit from 
that class, it doesn't actually achieve this in all cases -- you'll 
still have problems if you inherit from two classes with the same names 
that use the same __ attribute:

---------- a.py ----------
class A(object):
     pass

---------- b.py ----------
import a

class X(a.A):
     def __init__(self):
         self.__x = 'b.X.__x'
         super(X, self).__init__()

---------- c.py ----------
import a

class X(a.A):
     def __init__(self):
         self.__x = 'c.X.__x'
         super(X, self).__init__()

---------- d.py ----------
import b, c

class D(b.X, c.X):
     pass

--------------------------

py> import d
py> d.D().__dict__
{'_X__x': 'c.X.__x', '_A__x': 'A'}

Note that the D object has two __x attributes, not three, like it 
should.  Code in b.py which depends on the __x attribute is now broken 
because __x should should have the value 'b.X.__x' but instead it has 
the value from the c module, 'c.X.__x'.


The solution to this is to have names mangled with their module name as 
well, but that's backwards incompatible, so Python's not likely to 
change that way.


My general feeling here is that "we're all consenting adults", and that 
__ is probably not helpful in most cases.  If you simply don't want the 
attribute shown by, say, pydoc, prefixing a single underscore should be 
sufficient and doesn't invoke the name-mangling.

STeVe


From jfj at freemail.gr  Mon Feb 14 16:23:03 2005
From: jfj at freemail.gr (jfj)
Date: Mon, 14 Feb 2005 13:23:03 -0800
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cup249$svu$1@gemini.csx.cam.ac.uk>
References: <cuo71l$gig$1@usenet.otenet.gr> <cup249$svu$1@gemini.csx.cam.ac.uk>
Message-ID: <421116B7.6030306@freemail.gr>

Michael Hoffman wrote:

> Ilias Lazaridis wrote:

>> b) Why does the Python Foundation not ensure, that the python 
>> source-code is directly compilable with MinGW?
> 
> 
> Why should they? It already runs on Windows with a freely available
> compiler.

The point is that the freely available compiler wouldn't be free if
it wasn't for gcc.  Just for that I _believe_ python, being open source,
should support mingw as the default.  But I *don't care* and I don't 
mind, really ;)


jfj



From aurora00 at gmail.com  Fri Feb 18 12:16:59 2005
From: aurora00 at gmail.com (aurora)
Date: Fri, 18 Feb 2005 09:16:59 -0800
Subject: Newbie CGI problem
References: <mailman.2809.1108746657.22381.python-list@python.org>
Message-ID: <opsmekylly6yt6e7@news.cisco.com>

Not sure about the repeated hi. But you are supposed to use \r\n\r\n, not  
just \n\n according to the HTTP specification.

> #!/usr/bin/python
> import cgi
> print "Content-type: text/html\n\n"
> print "hi"
>
> Gives me the following in my browser:
>
> '''
> hi
> Content-type: text/html
>
>
> hi
> '''
>
> Why are there two 'hi's?
>
> Thanks,
> Rory



From thomastnewman at yahoo.com  Sat Feb 26 16:21:21 2005
From: thomastnewman at yahoo.com (Thomas Newman)
Date: Sat, 26 Feb 2005 22:21:21 +0100
Subject: [solved] Re: error in non-existing code?
In-Reply-To: <421740E4.5030005@yahoo.com>
References: <mailman.2782.1108677969.22381.python-list@python.org>	<cv364j$omq$1@gemini.csx.cam.ac.uk>
	<421740E4.5030005@yahoo.com>
Message-ID: <4220E851.4000101@yahoo.com>

Thomas Newman wrote:

>Michael Hoffman wrote:
>
>  
>
>>Thomas Newman wrote:
>>
>>    
>>
>>>I wanted to look at the code that gives me the error, but there is no
>>>line 447 in /usr/lib/python2.3/pyclbr.py:
>>>      
>>>
>>Try deleting pyclbr.py[co].
>>    
>>
There were recursive imports, meaning file A imported file B and vice
versa.
Solving that issue removed the error.
Still I find it confusing.

ttn


From deetsNOSPAM at web.de  Tue Feb  1 10:52:56 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Tue, 01 Feb 2005 16:52:56 +0100
Subject: Awkwardness of C API for making tuples
References: <dave.opstad-E4D4C4.07281701022005@reader0900.news.uu.net>
Message-ID: <369mplF4ubv6mU2@individual.net>

> One of the functions in a C extension I'm writing needs to return a
> tuple of integers, where the length of the tuple is only known at
> runtime. I'm currently doing a loop calling PyInt_FromLong to make the
> integers, then PyTuple_New, and finally a loop calling PyTuple_SET_ITEM
> to set the tuple's items. Whew.
> 
> Does anyone know of a simpler way? I can't use Py_BuildValue because I
> don't know at compile-time how many values there are going to be. And
> there doesn't seem to be a PyTuple_FromArray() function.
> 
> If I'm overlooking something obvious, please clue me in!

If you already know _how_ to create a function like  PyTuple_FromArray() -
why don't you define it yourself and use it?

-- 
Regards,

Diez B. Roggisch


From claudio.grondi at freenet.de  Fri Feb  4 17:35:45 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Fri, 4 Feb 2005 22:35:45 -0000
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot><1107487113.732375.110850@c13g2000cwb.googlegroups.com><opslnmywarej1m1c@ashot><mailman.1865.1107491434.22381.python-list@python.org><opsln54fpwej1m1c@ashot>
	<36hculF51ho2sU1@individual.net><1107530489.308497.103530@g14g2000cwa.googlegroups.com><36hrjpF4ui8fbU1@individual.net>
	<mailman.1911.1107546744.22381.python-list@python.org>
Message-ID: <36i84qF52ce29U1@individual.net>

I have installed version 1.8. It makes is even worse,
because now also "In [1]:" gets black background
and is unreadable (it had a grey background before).
Re-installing 1.7 makes the background again
gray. I use German Windows 2000 SP 4 as OS.

Claudio
P.S. In quote marks the parts with black background:
"In [1]:" sdlfjf
"---------------------------------------------------------------------------
"
"exceptions.NameError"                                 Traceback (most
recent call last)


"Fernando Perez" <fperez.net at gmail.com> schrieb im Newsbeitrag
news:mailman.1911.1107546744.22381.python-list at python.org...
> Claudio Grondi wrote:
>
> > I use this one,
> >
http://heanet.dl.sourceforge.net/sourceforge/uncpythontools/readline-1.7.win
> > 32.exe
> > which I assume is the right one.
>
> Try version 1.8, some coloring problems have been recently fixed.  If that
> doesn't do it, let me know and I'll try to get in touch with the author to
see
> if he can help.
>
> Cheers,
>
> f
>




From joele at qalabs.com  Wed Feb  2 16:53:53 2005
From: joele at qalabs.com (Joel Eusebio)
Date: Wed, 2 Feb 2005 13:53:53 -0800
Subject: errors 
Message-ID: <20050202214730.112D31E4004@bag.python.org>


Can someone help me on this, I don' know where the "testmptest" came from
but the mptest.py is at the /usr/local/apache2/htdocs/test directory and
this error came from apache's error_log

PythonHandler mod_python.publisher: ImportError: No module named testmptest

Thanks,

Joel



From exogen at gmail.com  Fri Feb 18 20:13:10 2005
From: exogen at gmail.com (Brian Beck)
Date: Fri, 18 Feb 2005 20:13:10 -0500
Subject: [perl-python] exercise: partition a list by equivalence
In-Reply-To: <cv63sg$11k$1@eeyore.INS.cwru.edu>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<cv63sg$11k$1@eeyore.INS.cwru.edu>
Message-ID: <cv640l$11k$2@eeyore.INS.cwru.edu>

Brian Beck wrote:
 > [code]

Whoops, that should say:

def merge(pairs):
     pairs = set(tuple(sorted(p)) for p in pairs)
     merged = []
     # Each loop will result in a new, complete sublist in the result.
     while pairs:
         p = set(pairs.pop())
         remove = set([])
         for pair in pairs:
             pairSet = set(pair)
             if pairSet & p:
                 p |= pairSet
                 remove.add(pair)
         pairs -= remove
         merged.append(list(p))
     return merged

--
Brian Beck
Adventurer of the First Order


From snacktime at gmail.com  Mon Feb 14 20:40:43 2005
From: snacktime at gmail.com (snacktime)
Date: Mon, 14 Feb 2005 17:40:43 -0800
Subject: regular expression question
In-Reply-To: <42115020$0$15705$626a14ce@news.free.fr>
References: <mailman.2598.1108429453.22381.python-list@python.org>
	<42115020$0$15705$626a14ce@news.free.fr>
Message-ID: <1f060c4c05021417407d04ce89@mail.gmail.com>

> You may want something like:
> if re.search('%s(.*)%s' % (STX, ETX), data):
>

Ah I didn't even think about that...

Chris


From Scott.Daniels at Acm.Org  Fri Feb 11 17:24:46 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Fri, 11 Feb 2005 14:24:46 -0800
Subject: Iteration over two sequences
In-Reply-To: <ll7Pd.24923$uc.21731@trnddc09>
References: <1gq9qs9.3snutr1s4mcn2N%news+0409@henrikholm.com>
	<1105549514.563799.307030@z14g2000cwz.googlegroups.com>
	<1gq9z5q.1x7si1us4kgmcN%news+0409@henrikholm.com>
	<41e58244$1@nntp0.pdx.net> <ll7Pd.24923$uc.21731@trnddc09>
Message-ID: <420d2ce4$1@nntp0.pdx.net>

David Isaac wrote:
> "Scott David Daniels" <Scott.Daniels at Acm.Org> wrote in message
> news:41e58244$1 at nntp0.pdx.net:
> 
>>Numarray is the future, Numeric is the "past",
> 
> This statement is not obviously true.  See the recent discussion on the 
> developer lists. (Search for Numeric3.)
> Alan Isaac

I stand corrected.  Sorry to have conveyed a mis-impression that I have
held for a while.  It was my understanding that the Numeric code was so
hard to maintain that our fearless leader would never let it in the
codebase.  Hence, Numarray was born.  A quick look through some of the
Numeric3 messages leaves me with the impression that Numeric3 will be
more of a rebirth than a small change.  I have used Numeric for several
big projects (that died for commercial, rather than technical, reasons),
and have certainly appreciated it.  The thrust of my comment holds,
however, "learning both is not much harder than learning one."

--Scott David Daniels
Scott.Daniels at Acm.Org


From mahs at telcopartners.com  Fri Feb 11 22:58:09 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 11 Feb 2005 19:58:09 -0800
Subject: listerator clonage
In-Reply-To: <a10b8d6205021117573f6d403d@mail.gmail.com>
References: <a10b8d6205021117573f6d403d@mail.gmail.com>
Message-ID: <cujuno$8ok$1@sea.gmane.org>

Cyril BAZIN wrote:
> Hello, 
> 
> I want to build a function which return values which appear two or
> more times in a list:

This is very similar to removing duplicate items from a list which was the 
subject of a long recent thread, full of suggested approaches.
Here's one way to do what you want:

 >>> l = [1, 7, 3, 4, 3, 2, 1]
 >>> seen = set()
 >>> set(x for x in l if x in seen or seen.add(x))
set([1, 3])
 >>>

This is a 'generator expression' applied as an argument to the set constructor. 
  It relies on the fact that seen.add returns None, and is therefore always false.

this is equivalent to:

 >>> def _generate_duplicates(iterable):
...     seen = set()
...     for x in iterable:
...         if x in seen: # it's a duplicate
...             yield x
...         else:
...             seen.add(x)
...
 >>> generator = _generate_duplicates(l)
 >>> generator
<generator object at 0x16C114B8>
 >>> set(generator)
set([1, 3])

 >>> # In case you want to preserve the order and number of the duplicates, you
 >>> # would use a list
 >>> generator = _generate_duplicates(l)
 >>> list(generator)
[3, 1]
 >>>

> 
> So, I decided to write a little example which doesn't work:
> #l = [1, 7, 3, 4, 3, 2, 1]
> #i = iter(l)
> #for x in i:
> #    j = iter(i)
> #    for y in j:
> #        if x == y:
> #            print x
> 
> In thinked that the instruction 'j= iter(i)' create a new iterator 'j'
> based on 'i' (some kind of clone). I wrote this little test which show
> that 'j = iter(i)' is the same as 'j = i' (that makes me sad):

I don't think your algorithm would work even if iter(iterator) did return a copy 
or separate iterator.  If, however, you do have an algorithm that needs that 
capability, you can use itertools.tee

Cheers
Michael



From thomasbartkus at comcast.net  Wed Feb 23 22:50:25 2005
From: thomasbartkus at comcast.net (tom)
Date: Wed, 23 Feb 2005 21:50:25 -0600
Subject: rounding problem
References: <gu6dnWNLB-FHuoDfRVn-tA@comcast.com>
Message-ID: <pan.2005.02.24.03.50.24.914208@comcast.net>

On Wed, 23 Feb 2005 19:04:47 -0600, Andy Leszczynski wrote:

> It is on Windows, Linux, Python 2.3:
> 
> [GCC 3.3.2 (Mandrake Linux 10.0 3.3.2-6mdk)] on linux2 Type "help",
> "copyright", "credits" or "license" for more information.
>  >>> a=1.1
>  >>> a
> 1.1000000000000001
>  >>>
>  >>>
>  >>>
> Is it normal?

Yes. Quite normal.

Floating point numbers are by nature approximations. When you enter your
variable "a" at the prompt, you are asking for a very raw (i.e totally
unformatted!) dump of what your variable "a" contains. It is the
most precise representation of the float 1.1 that your computer can store.
 It is probably the best precision your hardware math processor subsystem
has to offer. And, incidentally, that ain't too shabby since a 1 in the
16th decimal place ain't worth spit!

Try putting a print statement in front of your variable.
>>> print a
>>> 1.1

The print statement ,by itself, adds the most minimial formatting, which
amounts to dropping the last significant digit your math processor holds.
That last digit will *always* contain some arithmetic slop.

If you do any serious work with floats, you will want to learn about
significant figures and the use of the very essential round() function in
whatever language you are using. If you do, you will find that this
situation is really a math thing and has little to do with computers or
any particular language. It's the exact same problem one runs into when
using a slide rule.

If anyone remembers those things :-)
Thomas Bartkus



From supergood at hotmail.com  Tue Feb 15 23:06:29 2005
From: supergood at hotmail.com (supergood at hotmail.com)
Date: Wed, 16 Feb 2005 04:06:29 +0000 (UTC)
Subject: =?iso-8859-1?q?=BCM!!!_=A6n=B3=A5=2E=2E_=ABl!=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E?=
Message-ID: <cuugs5$28am$282@news.hgc.com.hk>

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Basic Plan W200: (?C?? $20)
-- 200MB ????????
-- ?L???q?l?H?c
-- ?L???????????q
-- ???? ASP+Access / CGI
-- ?q?l?f?r?L?o?t??
-- ?U???q?l?L?o?t??
http://www.uhostnet.com/modules.php?name=service&file=index&func=windetails&plan=A

Windows W300: (?C?? $38)
-- ?@?~?????s???W
-- 300MB ????????
-- ?L???q?l?H?c
-- ?L???????????q
-- ???? PHP+MySQL, ASP+ACCESS, CGI, SSI
-- 1 ?? MySQL ?????w (5MB)
-- ?q?l?f?r?L?o?t??
-- ?U???q?l?L?o?t??
http://www.uhostnet.com/modules.php?name=service&file=index&func=windetails&plan=B

Windows W500: (?C?? $48)
-- ?@?~?????s???W
-- ?l???? 3 ?? (?v?g???P????)
-- 500MB ????????
-- ?L???q?l?H?c
-- ?L???????????q
-- ???? PHP+MySQL, ASP+ACCESS, CGI, SSI
-- 1 ?? MySQL ?????w (10MB)
-- ?q?l?f?r?L?o?t??
-- ?U???q?l?L?o?t??
http://www.uhostnet.com/modules.php?name=service&file=index&func=windetails&plan=C

Windows W800: (?C?? $58)
-- ?@?~?????s???W
-- ?l???? 5 ?? (?v?g???P????)
-- 800MB ????????
-- ?L???q?l?H?c
-- ?L???????????q
-- ???? PHP+MySQL, ASP+ACCESS, CGI, SSI
-- 1 ?? MySQL ?????w (20MB)
-- ?q?l?f?r?L?o?t??
-- ?U???q?l?L?o?t??
http://www.uhostnet.com/modules.php?name=service&file=index&func=windetails&plan=D

Windows W1000: (?C?? $68)
-- ?@?~?????s???W
-- ?l???? 10 ?? (?v?g???P????)
-- 1GB ????????
-- ?L???q?l?H?c
-- ?L???????????q
-- ???? PHP+MySQL, ASP+ACCESS, CGI, SSI
-- 1 ?? MySQL ?????w (50MB)
-- ?q?l?f?r?L?o?t??
-- ?U???q?l?L?o?t??
-- ?e?????w???????{????osc???????t??
http://www.uhostnet.com/modules.php?name=service&file=index&func=windetails&plan=E

.............................................................................................................................................................................................................................................................................................


From martin at v.loewis.de  Sun Feb 13 15:09:25 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 13 Feb 2005 21:09:25 +0100
Subject: sre is broken in SuSE 9.2
In-Reply-To: <mailman.2442.1108198286.22381.python-list@python.org>
References: <mailman.2299.1108029731.22381.python-list@python.org>	<1108060527.378911.146240@o13g2000cwo.googlegroups.com>	<420D4D9A.40201@v.loewis.de>
	<cuke1o$fo4$1@news.comcor-tv.ru>	<cukfdn$ttq$1@sea.gmane.org>
	<mailman.2442.1108198286.22381.python-list@python.org>
Message-ID: <420FB3F5.2010001@v.loewis.de>

Denis S. Otkidach wrote:
> You are right.  But isalpha behavior looks strange for me anyway: why
> cyrillic character '\u0430' is recognized as alpha one for de_DE locale,
> but is not for C?

In glibc, all "real" locales are based on
/usr/share/locale/i18n/locales/i18n, e.g. for de_DE through

LC_CTYPE
copy "i18n"

i18n includes U+0430 as a character, through

lower /
...
% TABLE 11 CYRILLIC/
    <U0430>..<U045F>;<U0461>..(2)..<U047F>;/

This makes U+0430 a letter in all locales including i18n
(unless locally overridden). This entire approach apparently
is based on ISO 14652, which, in section 4.3.3, introduces
the "i18n" LC_CTYPE category.

Why the C locale does not use i18n, I don't know. Most likely,
the intention is that the "C" locale works without any
additional data files - you should ask the glibc developers.
OTOH, there is a definition file POSIX for what appears
to be the POSIX locale.

I'd like to point out that this implementation is potentially
in violation of ISO 14652; annex A.2.2 says that the notion
of a POSIX locale is replaced with the i18n FDCC-set. So
accordingly, I would expect that i18n is used in POSIX as
well - see for yourself that it isn't in glibc 2.3.2.

Again, I suggest to ask the glibc developers as to why
this is so.

Regards,
Martin


From dontwant at spam.com  Mon Feb  7 23:52:01 2005
From: dontwant at spam.com (Courageous)
Date: Mon, 07 Feb 2005 20:52:01 -0800
Subject: Big development in the GUI realm
References: <mailman.2123.1107820051.22381.python-list@python.org>
	<4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com>
	<cu95nd$7cr$1@news1.ucsd.edu>
Message-ID: <61hg01drjemr0a4jlansfptc2s8ub781tf@4ax.com>


>Now, that's not to say that they are correct in their interpretation of 
>the GPL's terms. In fact, if I had to bet on an outcome, I'd probably 
>wager that the court would hold that only static linking would force the 
>program as a whole to follow the GPL terms.

I just wrote and deleted a long diatribe. But then I realized you are
specifically speaking of the GPL's language. I once wrote RMS specifically
on this subject. Back then, he agreed that it was ambiguous. The language
of the GPL has changed over the years; and you are right: the court would
have to rule about the terms, quite specifically because it would be reasonable
to quibble over what rights have or have not been granted.

My long diatribe was on copyright law itself. Not pertinent.

Motion to strike and all that. :-)

C//



From steven.bethard at gmail.com  Wed Feb 23 02:28:09 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 23 Feb 2005 00:28:09 -0700
Subject: unicode(obj, errors='foo') raises TypeError - bug?
In-Reply-To: <mailman.2958.1109141791.22381.python-list@python.org>
References: <mailman.2958.1109141791.22381.python-list@python.org>
Message-ID: <ydWdndBX1-sXrYHfRVn-vQ@comcast.com>

Mike Brown wrote:
>>>>class C:
> ...   def __str__(self):
> ...      return 'asdf\xff'
> ...
>>>>o = C()
>>>>unicode(o, errors='replace')
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> TypeError: coercing to Unicode: need string or buffer, instance found
>
[snip]
> 
> What am I doing wrong? Is this a bug in Python?

No, this is documented behavior[1]:

"""
unicode([object[, encoding [, errors]]])
     ...
     For objects which provide a __unicode__() method, it will call this 
method without arguments to create a Unicode string. For all other 
objects, the 8-bit string version or representation is requested and 
then converted to a Unicode string using the codec for the default 
encoding in 'strict' mode.
"""

Note that the documentation basically says that it will call str() on 
your object, and then convert it in 'strict' mode.  You should either 
define __unicode__ or call str() manually on the object.

STeVe

[1] http://docs.python.org/lib/built-in-funcs.html


From http  Wed Feb 16 17:32:06 2005
From: http (Paul Rubin)
Date: 16 Feb 2005 14:32:06 -0800
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<1108570047.677348.146850@f14g2000cwb.googlegroups.com>
	<7x7jl8bhii.fsf@ruckus.brouhaha.com>
	<1108572988.341139.126020@z14g2000cwz.googlegroups.com>
Message-ID: <7xd5v02l21.fsf@ruckus.brouhaha.com>

"Michele Simionato" <michele.simionato at gmail.com> writes:
> The documentation hides this fact (I missed that) but actually python
> 2.3+ ships
> with the pybsddb module which has all the functionality you allude too.
> Check at the test directory for bsddb.

Oh yow, it looks pretty complicated.  Do you have any example code
around that uses the transaction stuff?  If not I can try to figure it
out, but it looks like it would take significant effort.


From carl.manaster at gmail.com  Wed Feb  2 14:52:29 2005
From: carl.manaster at gmail.com (carl.manaster at gmail.com)
Date: 2 Feb 2005 11:52:29 -0800
Subject: Integrated Testing - Peppable?
Message-ID: <1107373949.960435.212020@z14g2000cwz.googlegroups.com>

Hi,

Please excuse the intrusion from an admirer, but not a user, of Python.

I've got an idea that I think could improve the language and might be
relatively simple to implement.  I've developed a prototype with a toy
language here: <https://sourceforge.net/projects/zbt/>, with screenshot
here: <https://sourceforge.net/project/screenshots.php?group_id=130278>

The idea is that if the language had testing built into it, editors
could take advantage of that to highlight, not by syntax, but by
correctness (as defined by the tests).  As a side effect, coverage
coloring is also possible.

So far, I see the need for three keywords: "expect", "returns", and
"archetype".  "expect" and "returns" get used together, as an
expression of what the function should return, given certain inputs.
"archetype" would define edit-type instantiable objects that could be
used in the tests.  The biggest lack at present is support for void
functions.

So...  Should I turn this into a PEP?

Peace,
--Carl



From maxm at mxm.dk  Wed Feb  2 04:39:41 2005
From: maxm at mxm.dk (Max M)
Date: Wed, 02 Feb 2005 10:39:41 +0100
Subject: Printing Filenames with non-Ascii-Characters
In-Reply-To: <36bka5F4vp17cU1@individual.net>
References: <36a3ikF4uk8r0U1@individual.net>
	<ctos5r$t3b$1@news2.tilbu1.nb.home.nl>
	<36bka5F4vp17cU1@individual.net>
Message-ID: <42009f9b$0$238$edfadb0f@dread12.news.tele.dk>

Marian Aldenh?vel wrote:

>  > If you're printing to the console, modern Pythons will try to guess the
>  > console's encoding (e.g. cp850).
> 
> But it seems to have quessed wrong. I don't blame it, I would not know of
> any way to reliably figure out this setting.

Have you set the coding cookie in your file?

Try adding this as the first or second line.

# -*- coding: cp850 -*-

Python will then know how your file is encoded

-- 

hilsen/regards Max M, Denmark

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


From tchur at optushome.com.au  Mon Feb  7 15:57:51 2005
From: tchur at optushome.com.au (Tim Churches)
Date: Tue, 08 Feb 2005 07:57:51 +1100
Subject: Big development in the GUI realm
In-Reply-To: <cu8h8k$md4$1@sea.gmane.org>
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com><mailman.2092.1107797420.22381.python-list@python.org><5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com><mailman.2095.1107801722.22381.python-list@python.org>	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<cu8h8k$md4$1@sea.gmane.org>
Message-ID: <4207D64F.2000709@optushome.com.au>

Fredrik Lundh wrote:

>Luke Skywalker wrote:
>
>  
>
>>Considering the fact that the Qt DLL exist by themselves, that the
>>version used is the one provided by Qt, and that the EXE uses a
>>standard, open way to communicate with it, the above does seem to say
>>this use would be valid.
>>    
>>
>
>    http://www.gnu.org/licenses/gpl-faq.html#MereAggregation
>
>    "/.../ If modules are designed to run linked together in a shared address
>    space, that almost surely means combining them into one program.
>
>    By contrast, pipes, sockets and command-line arguments are
>    communication mechanisms normally used between two separate
>    programs. So when they are used for communication, the modules
>    normally are separate programs. But if the semantics of the
>    communication are intimate enough, exchanging complex internal
>    data structures, that too could be a basis to consider the two parts
>    as combined into a larger program."
>
></F> 
>  
>
Yes, that is what the FSF GPL FAQ says. However, the GPL itself says:

"[Section 0] Activities other than copying, distribution and 
modification are not covered by this License; they are outside its scope."

There is not, AFAICS, any formal definition of what is meant by 
"modification" in the GPL.

Section 2.b of the GPL says:

"b) You must cause any work that you distribute or publish, that in 
whole or in part contains or is derived from the Program or any part 
thereof, to be licensed as a whole at no charge to all third parties 
under the terms of this License."

and Section 2 goes on to say:

"These requirements apply to the modified work as a whole. If 
identifiable sections of that work are not derived from the Program, and 
can be reasonably considered independent and separate works in 
themselves, then this License, and its terms, do not apply to those 
sections when you distribute them as separate works. But when you 
distribute the same sections as part of a whole which is a work based on 
the Program, the distribution of the whole must be on the terms of this 
License, whose permissions for other licensees extend to the entire 
whole, and thus to each and every part regardless of who wrote it."

Thus, it seems to me, and to the expert legal advice which we sought 
(note the scope of the advice was Australian law only) that provided no 
GLPed source or object code is mixed, included or combined with 
non-GPLed code, and that the GPLed and non-GPLed code are distributed or 
otherwise made available in packages which are very clearly separate 
works, and that any interaction between the two is restricted to 
runtime, then the GPL does not require that non-GPLed code to be 
distributed under the GPL.

It is arguable whether that opinion is at odds with the sentiments 
expressed in the FSF GPL FAQ - it depends whether importing two python 
modules into the same namespace is considered equivalent to, as the FAQ 
says, "run linked together in a shared address space", but ultimately, 
it is what the GPL license text says, not what the FSF FAQ says, which 
matters.

Note that I am not in favour of or advocating any attempt to circumvent 
or undermine the GPL. I just think it is important to be guided by what 
software licenses actually say, rather than by what the authors of the 
licenses wished they had said in retrospect.

Tim C



From http  Thu Feb  3 22:00:30 2005
From: http (Paul Rubin)
Date: 03 Feb 2005 19:00:30 -0800
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
Message-ID: <7xy8e5jagh.fsf@ruckus.brouhaha.com>

Kartic <removethis.kartic.krishnamurthy at gmail.com> writes:
> And the reason for that I probably because of the way the language is
> used (PHP) (this is a shot in the dark as I have not looked into
> Mediawiki code), and compounded by probably an unoptimized database.

I have the idea that the Wikipedia implementers know what they're doing,
but I haven't looked into it super closely.

> I don't want to start flame wars here about PHP; I use PHP to build
> client sites and like it for the "easy building of dynamic sites"
> but the downside is that there is no "memory"...every page is
> compiled each time a request is made. I doubt if Wikipedia site uses
> an optimizer (like Zend) or caching mechanisms. Optimizers and/or
> PHP caches make a huge performance difference.

They do use an optimizer similar to Zend.  They also use Squid as a
static cache.

> Also, PHP has put dynamic sites within easy reach of several
> programmers who slap together sites in no time. These sites may have
> spaghetti code and even the best infrastructure is not enough to
> support shabby design (code, db setup and even server tuning). I have
> seen people become programmers overnight! There are also LAMP sites
> that use Apache 1.3 that is a resource hog; I guess production sites
> do not want to upgrade to Apache 2.x/PHP combo!

Hmm, I wasn't aware that Apache 2.x gave any significant speedups
over 1.3 except under Windows.  Am I missing something?

> The way to go is to build around application servers, IMHO. I like the
> Twisted.web/Nevow methodology, though for simple situations it may be
> an overkill. 

Hmm, I'm not familiar with Nevow.  Twisted is pretty neat, though
confusing.  I don't see how to scale it to multiple servers though.

I'm asking this question mainly as it relates to midrange or larger
sites, not the very simplest ones (e.g. on my personal site I just use
Python cgi's, which are fine for the few dozen or so hits a week that
they get).  So, the complexity of twisted is acceptable.

> From my experience it is an overall tuning thing. Usual culprits are
> untuned Linux boxes, unoptimized database design, poorly designed
> queries and/or poor application logic...and ah! table-driven
> pages. Pages built on tables for the layout kill the browser. CSS is
> the way to go.

Yes, good point about html tables, though I'm concerned primarily
about server response.  (It's off-topic, but how do you use CSS to get
the effect of tables?)


From vincent at visualtrans.de  Sun Feb  6 03:30:49 2005
From: vincent at visualtrans.de (vincent wehren)
Date: Sun, 06 Feb 2005 09:30:49 +0100
Subject: Word for a non-iterator iterable?
In-Reply-To: <36lu1cF516qtdU1@individual.net>
References: <36lu1cF516qtdU1@individual.net>
Message-ID: <cu4kjo$d8s$1@news2.tilbu1.nb.home.nl>

Leif K-Brooks wrote:
> Is there a word for an iterable object which isn't also an iterator, and 
> therefor can be iterated over multiple times without being exhausted? 
> "Sequence" is close, but a non-iterator iterable could technically 
> provide an __iter__ method without implementing the sequence protocol, 
> so it's not quite right.

How about 'reiterable'?

--
Vincent Wehren


From tzot at sil-tec.gr  Fri Feb  4 19:07:11 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Sat, 05 Feb 2005 02:07:11 +0200
Subject: advice needed for simple python web app
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
	<7xr7jxnddh.fsf@ruckus.brouhaha.com>
	<OqCdnWO5h9_ynp7fRVn-uA@rogers.com>
	<7xis58c1lw.fsf@ruckus.brouhaha.com>
	<TOWdndFTsJD1j57fRVn-og@rogers.com>
	<7x6518bzu8.fsf@ruckus.brouhaha.com>
Message-ID: <993801hfj94107ltbc8f09ng29elntgqnl@4ax.com>

On 03 Feb 2005 22:31:43 -0800, rumours say that Paul Rubin
<http://phr.cx at NOSPAM.invalid> might have written:

[Dan Perl thinks about publishing to the web a script that could be misused by
spammers, so Paul advises him to watch out.]

>There used
>to be some similar perl scripts running all over the place until that 
>happened.

Those were pure perl scripts.  This will be a Perl python script, so no problem.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From martin at v.loewis.de  Tue Feb  8 15:40:21 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 08 Feb 2005 21:40:21 +0100
Subject: msvcp71.dll and Python 2.4 C++ extensions
In-Reply-To: <6snvv0pj0bdjhvvsvqkmj52hmmbi6kap0p@4ax.com>
References: <gk2tv0pbal8jd1qpaoj2hd5b5pq1esecaa@4ax.com>
	<41FEBBD6.4010402@v.loewis.de>
	<6snvv0pj0bdjhvvsvqkmj52hmmbi6kap0p@4ax.com>
Message-ID: <4209239f$0$30254$9b622d9e@news.freenet.de>

Matthias Baas wrote:
> I'm creating the installer via the distutils by calling "setup.py
> bdist_wininst". How can I configure distutils to have it create an
> installer that does the above things?

Ah, I see. Unfortunately, bdist_wininst is not capable of doing
a Windows logo compliant installation (with proper versioning checks,
shared dll reference count, etc) of a DLL. You will have to find
a different technology to distribute your application - or make sure
you copy the DLL in a place where it previously did not exist.

> How should an installer check if a DLL is already present? 

It should check if the file exists. If it exists, it should check
the version number of the file (there are APIs for that available),
and if the language of the installed DLL differs from the language
of the package's DLL. If the new DLL is somehow "better" (newer
version, or same version, different language, and user requested
overwriting), it should replace the DLL.

 > Are DLLs registered with Windows so I can query a database?

To some degree. If the software is uninstalled, the installer should
remove the file. If the file was already present at installation time,
removal may break other software. Therefor, there is a registry entry
for each path name that is a reference count, under

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\SharedDLLs

If you expect that the file is already there, you need to use that
mechanism.

> Or should the
> installer search for the DLL in the directories specified in the PATH
> variable and see if the DLL is there?

No. There is no problem at all to install the same DLL multiple times,
in different places. In fact, Microsoft discourages shared DLLs, and
recommends that each package should install its own copy.

Windows will look for a DLL in
- the directory of the EXE
- the current working directory
- system32
- windows
- PATH

In your case, putting the C++ DLL into the directory containing
python.exe might be sufficient. The safest thing, of course, is to
put the DLL into system32 - in which case you *have* to install it
shared.

> "An application should use and redistribute msvcr71.dll, and it should
> avoid placing a copy or using an existing copy of msvcr71.dll in the
> system directory. Instead, the application should keep a copy of
> msvcr71.dll in its application directory with the program executable."

Yes. This means to install it into the directory containing python.exe.
Unfortunately, this does not work if your extension is then used in
an embedded Python, e.g. one running as a COM object. In this case,
python.exe will not be the main executable, but, say, outlook.exe will
be. So Microsoft's recommendation to install the DLL into the EXE
directory is flawed for COM and other embedded cases. This is
precisely the reason why the Python installer installs both python24.dll
and msvcr71.dll into system32.

> Well, yes, I know. But I don't see Python as a standalone application.
> One of the great things about Python is that there are so many
> extension modules for every kinds of purposes. So, making available
> the C++ runtime would just pave the way for more of those extension
> modules by making it easier to distribute binary packages that are
> implemented in C++.

I think we agree that building and running such an extension is not
a problem - it just works.

Distributing such an extension is indeed a problem, as bdist_wininst
does not support this case properly.

I'll plan to write a bdist_msi one day, which should handle DLL
installation better as much of the magic required is built into
Windows Installer.

> I was referring to the possibility that the DLL might get installed
> several times at several different locations which would be a waste of
> disk space. If there's only one file, then I agree with the above
> (however, what happens if I uninstall one package and this package
> removes the DLL even when there are other packages installed that
> still require the DLL?).

The other packages will also have added to the shared reference counter.
Uninstalling will only DECREF the counter, and the file will be removed
only when the counter goes to zero.

> For one smaller package I was compiling I solved the problem by
> linking against the static versions of the C/C++ runtime. This will
> also satisfy the "It-Should-Just-Work" constraint... :)  (however,
> there still could be situations where this is not possible (the
> sources might not be available, for example)).

You should make sure to use the DLL version of the C runtime. Otherwise,
you will be mixing multiple C runtimes (one that python24.dll links
with, and one linked statically into your extension); this might cause
troubles (such as memory leaks and crashes).

Regards,
Martin


From martin at v.loewis.de  Sun Feb 27 18:26:13 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 28 Feb 2005 00:26:13 +0100
Subject: os.stat('<filename>')[stat.ST_INO] on Windows
In-Reply-To: <mailman.3123.1109541101.22381.python-list@python.org>
References: <422238b3$1@news.vo.lu>
	<mailman.3123.1109541101.22381.python-list@python.org>
Message-ID: <42225715$0$5004$9b622d9e@news.freenet.de>

jepler at unpythonic.net wrote:
  > Refer to the operating system documentation (msdn.microsoft.com?). 
os.stat is
> mostly a wrapper around whatever the OS provides.  A quick glance at Python
> source code shows that maybe _stati64() or _wistat64() is the actual function
> used on windows.

That doesn't really help: MSDN says

"""Number of the information node (the inode) for the file 
(UNIX-specific). On UNIX file systems, the inode describes the file date 
and time stamps, permissions, and content. When files are hard-linked to 
one another, they share the same inode. The inode, and therefore st_ino, 
has no meaning in the FAT, HPFS, or NTFS file systems.
"""

So we know it has no meaning, but they won't tell us what its value is.
Fortunately, MS ships the source of the CRT in VC, so we know st_ino
is always 0 (as are st_uid and st_gid).

Regards,
Martin



From xah at xahlee.org  Tue Feb 15 01:52:28 2005
From: xah at xahlee.org (Xah Lee)
Date: 14 Feb 2005 22:52:28 -0800
Subject: [perl-python] problem: reducing comparison
Message-ID: <1108450348.253772.158120@z14g2000cwz.googlegroups.com>

here's a interesting real-world algoritm to have fun with.

attached below is the Perl documentation that i wrote for a function
called "reduce", which is really the heart of a larger software.

The implementation is really simple, but the key is to understand what
the function should be. I'll post Perl and Python codes tomorrow for
those interested. If you are a perl programer, try to code it in
Python. (it's easy.)

This is brought to you by the Perl-Python a-day community. To
subscribe, see
http://xahlee.org/perl-python/python.html

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html

-------------------------------

=pod

e.g. reduce( $pairings, $a_pair) retured the first argument with some
pairs deleted.

Detail:

we have n things, represented by numbers 1 to n. Some of these are
identical. We want to partition the range of numbers 1 to n so that
identical ones are grouped together.

To begin comparison, we generate a list of pairings that's all
possible parings of numbers 1 to n. (of course order does not matter,
and the pairing does not contain repeations) This is the first
argument to reduce.

We'll go thru this pairings list one by one and do comparisons, remove
the pair once it has been compared. However, more pairs can be removed
if a we find a pair identical.

For example, suppose we know that 2 and 4 are identical, and if the
pairing list contains (2,3) and (4,3), one of them can be deleted
because now 2 and 4 are the same thing.

(We do this because we expect the comparison operation will be
expensive.)

reduce( $pairings, $a_pair) returns a reduced $pairings knowing that
$a_pair are identical.

The first argument $pairings must be in the form of a hash. e.g.

 {'1,5' => [1,5],'3,5' => [3,5],'2,4' => [2,4],'4,5' => [4,5],'1,3' =>
 [1,3],'2,5' => [2,5],'1,2' => [1,2],'3,4' => [3,4],'2,3' =>
 [2,3],'1,4' => [1,4]}

(Note that keys are strings of the pairs separated by a comma.)

$a_pair is a reference to a list of the form [$a,$b].

(different pairs may be deleted if the hash's pairs are given in
different order. i.e. 3,4 instead of 4,3)

The return value is a reference to a hash.

The program is deterministic but exactly which pairs are deleted is
unspecified. If the input is all possible pairs of 2 things out of n,
maximum reduction is guaranteed. 

=cut



From tom.willis at gmail.com  Sat Feb 12 15:34:09 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Sat, 12 Feb 2005 15:34:09 -0500
Subject: Python UPS / FedEx Shipping Module
In-Reply-To: <udePd.660$nC5.453@twister.nyroc.rr.com>
References: <mailman.2411.1108149803.22381.python-list@python.org>
	<udePd.660$nC5.453@twister.nyroc.rr.com>
Message-ID: <b54d0489050212123430ed621d@mail.gmail.com>

Are the modules just accessing the published apis for their webservices?

I'm just wondering because I used to work for a logistics mgmt 
company that paid money to be a strategic partner with
FedEx/UPS/Airborn etc so that they could information on how to return
rates/print labels/generate edi's/calculate arrival times etc.

I'd get a good laugh out of it suddenly being freely available now.





On Fri, 11 Feb 2005 19:00:25 -0800 (PST), Kartic
<removethis.kartic.krishnamurthy at gmail.com> wrote:
> Gabriel Cooper said the following on 2/11/2005 2:23 PM:
> > I've made UPS and FedEx shipping rate request modules in python using
> > XML. Is there an interest in putting this on the web?
> 
> I am interested in it for educational value, if not anything else.
> Please post the web address from which to download.
> 
> Thanks!
> -Kartic
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
Thomas G. Willis
http://paperbackmusic.net


From aleaxit at yahoo.com  Sun Feb  6 18:06:07 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 7 Feb 2005 00:06:07 +0100
Subject: empty classes as c structs?
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
	<MIadnXkLYul4hZjfRVn-2Q@comcast.com>
	<mailman.1991.1107637382.22381.python-list@python.org>
Message-ID: <1grl6r9.14ogjvkzi3r3iN%aleaxit@yahoo.com>

Brian van den Broek <bvande at po-box.mcgill.ca> wrote:
   ...
> (I'm just a hobbyist, so if this suggestion clashes with some well 
> established use of 'Bag' in CS terminology, well, never mind.)

Yep: a Bag is a more common and neater name for a "multiset" -- a
set-like container which holds each item ``a certain number of times''
(you can alternatively see it as a mapping from items to counts of
number of times the item is held).


Alex


From CathleenB at concord.etransmail4.com  Wed Feb 23 07:49:51 2005
From: CathleenB at concord.etransmail4.com (Cathleen Baer)
Date: Wed, 23 Feb 2005 04:49:51 -0800
Subject: How new Check 21 legislation is affecting you...
Message-ID: <21594389.1109162991128.JavaMail.customerService@etransmail4.com>

Good Afternoon!

Recenty intrdocuced legislation requires business and home users to print personal and business checks with security blank check stock and magnetic ink.
Please find qualified suppliers at Google by clicking on the followingl link.

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Thank you very much. 

Cathleen Baer                                     
Marketing & Relationship Representative
Globalzon Consulting Group 




From no at spam.invalid  Thu Feb  3 15:25:48 2005
From: no at spam.invalid (Russell E. Owen)
Date: Thu, 03 Feb 2005 12:25:48 -0800
Subject: continuous plotting with Tkinter
References: <42010f48$0$3408$5402220f@news.sunrise.ch>
Message-ID: <ctu1cc$3bt$1@gnus01.u.washington.edu>

In article <42010f48$0$3408$5402220f at news.sunrise.ch>,
 "Martin Blume" <mblume at socha.net> wrote:

>I have a number-crunching application that spits out 
>a lot of numbers. Now I'd like to pipe this into a python
>app and plot them using Tkinter, such as:
>$ number_cruncher | myplot.py
>But with Tkinter once  I call Tkinter's mainloop() I
>give up my control of the app and I can't continue to
>read in data from stdin.  Or can I? If so, how?

One way is to use a thread to read the numbers, then make them available 
to the main thread via a Queue object, which you poll for new values.

Another option is to use a Tk-compatible file or socket of some kind 
which triggers a callback when data comes in. See 
<http://www.astro.washington.edu/rowen/TkinterSummary.html#FileHandlers> 
some ideas on this.

-- Russell


From davidf at sjsoft.com  Mon Feb 14 05:02:50 2005
From: davidf at sjsoft.com (David Fraser)
Date: Mon, 14 Feb 2005 12:02:50 +0200
Subject: Commerical graphing packages?
In-Reply-To: <420d1595$1@nntp.zianet.com>
References: <420d1595$1@nntp.zianet.com>
Message-ID: <cupsik$an7$1@ctb-nnrp2.saix.net>

Erik Johnson wrote:
>     I am wanting to generate dynamic graphs for our website and would rather
> not invest the time in developing the code to draw these starting from
> graphics primitives. I am looking for something that is... "fairly robust"
> but our needs are relatively modest: X-Y scatter plots w/ data point
> symbols, multiple data set X-Y line plots, bar charts, etc.
> 
>     Preferably this would come from a company that can provide support &
> decent documentation, and a package that can be installed without a bunch of
> extra hassle (e.g., needs Numeric Python, needs to have the GD library
> installed, needs separate JPEG encoders, font libraries, etc.)
> 
>     I am aware of ChartDirector (http://www.advsofteng.com/ ) which
> explicitly supports python and seems to be about the right level of
> sophistication. I don't really know of any other packages in this space, do
> you? I am seeking feedback and reccomendations from people who have used
> this package or similar ones. I am particularly interested to hear about any
> limitations or problems you ran into with whatever package you are using.
> 
> Thanks for taking the time to read my post! :)

It's worth checking out matplotlib as well although it may not meet all 
your criteria ... but have a look, its a great package


From Serge.Orlov at gmail.com  Fri Feb 25 18:52:20 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: 25 Feb 2005 15:52:20 -0800
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
Message-ID: <1109375540.355916.163590@g14g2000cwa.googlegroups.com>

Alexander Zatvornitskiy wrote:
> Hello All!
>
> I'am novice in python, and I find one very bad thing (from my point
> of view) in language. There is no keyword or syntax to declare
> variable, like 'var' in > Pascal, or special syntax in C. It can
> cause very ugly errors,like this:
>
> epsilon=0
> S=0
> while epsilon<10:
>   S=S+epsilon
>   epselon=epsilon+1
> print S
>
> It will print zero, and it is not easy to find such a bug!

I'm late to the party, but I found an interesting text by the Guinness
book
record-holder in typing. He claims that the python way of dealing with
typos is right. He doesn't write about python directly but the main
idea is to punish heavily for every typo. He also has "nice" words for
software industry and the backspace key. Read it here:
http://www.supremelearning.com/bookexcerpts.html

By the way if my reading of poor quality scan of his record certificate
http://www.supremelearning.com/image_certificate.html is correct, his
typing speed was 614 characters/minute. Impressive! There is also his
book in Russian language:
http://www.supremelearning.com/russianslbookpart1.html

As for me, typos have never been a big problem. They happen rarely.
As the Guinness book record-holder suggests: don't make typos!

  Serge.



From nicodemus at esss.com.br  Fri Feb 11 07:15:42 2005
From: nicodemus at esss.com.br (Nicodemus)
Date: Fri, 11 Feb 2005 09:15:42 -0300
Subject: Multi-Platform installer generator
Message-ID: <420CA1EE.6000905@esss.com.br>

Hello list,

On windows my company uses Inno Setup to generate installers for our 
products, and on Linux we usually use a simple shell script, but we 
would like to use the same installer generator for both platforms. 
Searching google turned up some multi-platform installers (mostly in 
Java), but I gather that they require a Java VM installed in the target 
system, and that is undesirable for us, since most system don't come 
with a Java VM ready (or am I completely wrong in this aspect?).

So does anyone know if a multi-platform installer generator, that 
generates installers with GUI and has no requirements on the target 
system, exists?

Best Regards,
Nicodemus.


From francis.girard at free.fr  Sun Feb 13 14:22:14 2005
From: francis.girard at free.fr (Francis Girard)
Date: Sun, 13 Feb 2005 20:22:14 +0100
Subject: A great Alan Kay quote
In-Reply-To: <t25v01pe4j4o2ue2pc3fid2nsr7m8aj3cu@4ax.com>
References: <420a5c1e$0$21630$a1866201@visi.com>
	<mailman.2487.1108316884.22381.python-list@python.org>
	<t25v01pe4j4o2ue2pc3fid2nsr7m8aj3cu@4ax.com>
Message-ID: <200502132022.14877.francis.girard@free.fr>

Le dimanche 13 F?vrier 2005 19:05, Arthur a ?crit?:
> On Sun, 13 Feb 2005 18:48:03 +0100, Francis Girard >
>
> >My deepest apologies,
> >
> >Francis Girard
>
> Sorry if I helped get you into this, Francis.
>

No, no, don't worry. I really expressed my own opinions and feelings. At the 
same time, I certainly understand that these opinions might had upset some of 
the readers. I am sorry for this as I don't think this is the right 
discussion group for such opinions. Therefore it is useless to hurt people 
with something that is not a positive contribution. That's all. I will try to 
refrain in the future. I am just not used to talk to so many people at the 
same time.

Regards,

Francis Girard




From alex at fortworks.com  Thu Feb 17 20:36:12 2005
From: alex at fortworks.com (imphasing)
Date: 17 Feb 2005 17:36:12 -0800
Subject: Using open() inside a subroutine
Message-ID: <1108690572.599238.61820@c13g2000cwb.googlegroups.com>

Whenever I try to open a file inside a subroutine, like so:

def open():
	filePath=askopenfilename()

	fileOpen = open(filePath, "r")
	fileContent = fileOpen.read()
	fileOpen.close()

it tells me that "open() takes no arguments (2 given)"
Why is that? and how can I get around that so I can open a file in a
subroutine?

Thanks,
Alex



From mfranklin1 at gatwick.westerngeco.slb.com  Wed Feb  9 02:20:28 2005
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Wed, 09 Feb 2005 07:20:28 +0000
Subject: python connect to server using SSH protocol
In-Reply-To: <4208bdfa$1@sia.uibk.ac.at>
References: <1107850655.289129.94880@o13g2000cwo.googlegroups.com>	<mailman.2174.1107867553.22381.python-list@python.org>
	<4208bdfa$1@sia.uibk.ac.at>
Message-ID: <cucdh1$lpj$1@sea.gmane.org>

Simon Anders wrote:
> Hi
> 
> Laszlo Zsolt Nagy wrote:
> 
>> ajikoe at gmail.com wrote:
>>
>>> How can python connect to server which use SSH protocol?

<BIG SNIP>

> 
> There should be a better way.
> 
>    Simon

There is : pexpect!  http://pexpect.sourceforge.net/







From fperez.net at gmail.com  Wed Feb 16 13:20:32 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Wed, 16 Feb 2005 11:20:32 -0700
Subject: [ANN] IPython 0.6.11 is out.
References: <mailman.2609.1108458171.22381.python-list@python.org>
	<du7650spziv.fsf@mozart.cc.tut.fi>
Message-ID: <cv02of$8qd$1@sea.gmane.org>

Ville Vainio wrote:

> Warning - if you are upgrading and have an old pysh.py dangling around
> in $HOME/.ipython, be sure to delete it. The old version is
> incompatible with the new ipython.

Just to clarify: you need to delete ONLY the old pysh.py, not your entire
$HOME/.ipython/ directory.  

You can then update from the pysh.py which comes with the ipython distribution,
typically in 

sys.prefix/site-packages/IPython/UserConfig

Sorry about not putting this in the release notes, I didn't notice it myself.

Regards,

f



From grante at visi.com  Wed Feb  9 13:53:18 2005
From: grante at visi.com (Grant Edwards)
Date: 09 Feb 2005 18:53:18 GMT
Subject: A great Alan Kay quote
Message-ID: <420a5c1e$0$21630$a1866201@visi.com>

In an interview at http://acmqueue.com/modules.php?name=Content&pa=showpage&pid=273
Alan Kay said something I really liked, and I think it applies
equally well to Python as well as the languages mentioned:

    I characterized one way of looking at languages in this
    way: a lot of them are either the agglutination of features
    or they're a crystallization of style. Languages such as
    APL, Lisp, and Smalltalk are what you might call style
    languages, where there's a real center and imputed style to
    how you're supposed to do everything.

I think that "a crystallization of style" sums things up nicely.
The rest of the interview is pretty interesting as well.
    
-- 
Grant Edwards                   grante             Yow!  Look!! Karl Malden!
                                  at               
                               visi.com            


From francis.girard at free.fr  Wed Feb  2 04:53:55 2005
From: francis.girard at free.fr (Francis Girard)
Date: Wed, 2 Feb 2005 10:53:55 +0100
Subject: Next step after pychecker
In-Reply-To: <42009d13$0$24304$636a15ce@news.free.fr>
References: <41ff0308$0$6503$636a15ce@news.free.fr>
	<mailman.1726.1107313882.22381.python-list@python.org>
	<42009d13$0$24304$636a15ce@news.free.fr>
Message-ID: <200502021053.55502.francis.girard@free.fr>

To complete Philippe's answer :

As Bird and Wadler continue :

"The major consequence of the discipline imposed by strong-typing is that any 
expression which cannot be assigned a "sensible" type is regarded as not 
being well-formed and is rejected by the computer before evaluation. Such 
expression have _no_ value: they are simply regarded as illegal."

But Skip, I am sure that you can easily find an example by yourself. For 
example, replace "+" by a function that does different things depending on 
its argument type.

Francis Girard

Le mercredi 2 F?vrier 2005 10:27, Philippe Fremy a ?crit?:
> Skip Montanaro wrote:
> >     Francis> "Every well-formed expression of the language can be
> > assigned a Francis> type that can be deduced from the constituents of the
> > Francis> expression alone." Bird and Wadler, Introduction to Functional
> > Francis> Programming, 1988
> >
> >     Francis> This is certainly not the case for Python since one and the
> >     Francis> same variable can have different types depending upon the
> >     Francis> execution context. Example :
> >
> >     Francis> 1- if a is None:
> >     Francis> 2-   b = 1
> >     Francis> 3- else:
> >     Francis> 4-   b = "Phew"
> >     Francis> 5- b = b + 1
> >
> >     Francis> One cannot statically determine the type of b by examining
> > the Francis> line 5- alone.
> >
> > Do you have an example using a correct code fragment?  It makes no sense
> > to infer types in code that would clearly raise runtime errors:
>
> On the contrary, the point of type inference is to detect such errors.
> If the program was always well-formed, there would be no point in
> developing a type inference tool.
>
> 	Philippe



From http  Sun Feb 13 19:54:43 2005
From: http (Paul Rubin)
Date: 13 Feb 2005 16:54:43 -0800
Subject: Pythonic poker client
References: <1108334914.029293.14830@o13g2000cwo.googlegroups.com>
Message-ID: <7xpsz46jvw.fsf@ruckus.brouhaha.com>

hardieca at hotmail.com writes:
> I'm assuming that I need to figure out the port it uses, find the
> server, analyze the packets for commands, and then build an app that
> masquerades as the real client.
> 
> Anyone have any experience with this?

If you mean you want to write your own real-money poker client
(e.g. PartyPoker), I wouldn't advise it unless you really know what
you're doing, since those sites go nuts detecting bots and banning
their users.  The bot authors in turn use fancier and fancier methods
to escape detection, etc.

I don't play online poker or use these products myself, but as a
security geek I have some technical interest in this.  (Also some
friends of mine play online poker all the time, so I hear about it).

Take a look at http://www.winholdem.net for one of the bots currently
involved in such an arms race.  The winholdem folks also run their own
online poker room where bots of all persuasions are welcome, but
nobody is supposed to play for real money there.  That might be a good
place to develop and test your client.

I see now that Winholdem now has a "Team edition" which sounds like
it's now supporting outright collusion between (perhaps virtual)
players, rather than just being a bot attempting to play well.  I
suppose this is inevitable since that kind of thing has been happening
between live players for years.  It's currently still possible for
good players to win money steadily at these sites (since there are so
many weak players) but I wonder how long that situation will last.


From ncoghlan at iinet.net.au  Thu Feb 24 05:11:18 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Thu, 24 Feb 2005 20:11:18 +1000
Subject: Dynamically pass a function arguments from a dict
In-Reply-To: <opsmon9pylcq4h53@rr-22.mshome.net>
References: <opsmoch20bcq4h53@rr-22.mshome.net> <421D29E7.5010609@mceahern.com>
	<opsmon9pylcq4h53@rr-22.mshome.net>
Message-ID: <421DA846.4050903@iinet.net.au>

Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
Running startup script
Py> import inspect
Py> help(inspect.getargspec)
Help on function getargspec in module inspect:

getargspec(func)
     Get the names and default values of a function's arguments.

     A tuple of four things is returned: (args, varargs, varkw, defaults).
     'args' is a list of the argument names (it may contain nested lists).
     'varargs' and 'varkw' are the names of the * and ** arguments or None.
     'defaults' is an n-tuple of the default values of the last n arguments.


Don't-forget-the-std-lib'ly,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From snail at objmedia.demon.co.uk  Thu Feb 17 15:32:46 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Thu, 17 Feb 2005 20:32:46 +0000
Subject: [EVALUATION] - E02 - ULTIMATE RECIPE TO RESOLVE ALL ISSUES
References: <cuo71l$gig$1@usenet.otenet.gr> <cuv1st$6um$1@swifty.westend.com>
	<cv2m54$hnf$1@usenet.otenet.gr>
	<oTF1JdVCdOFCFwep@objmedia.demon.co.uk>
	<pan.2005.02.17.14.55.29.665531@jerf.org>
Message-ID: <$R+Q5Dau9PFCFwND@objmedia.demon.co.uk>

In message <pan.2005.02.17.14.55.29.665531 at jerf.org>, Jeremy Bowers 
<jerf at jerf.org> writes
>course he'd still have to read docs and learn how to use it.

Yeah - one guy in c.l.ruby wrote a reply that must have taken minimum 30 
minutes. Really detailed. Lots of people thanked him for it. Ilias 
dissed the whole post with "I have not read it, it is not on topic".

>Moderately on topic (not Python, but programming at least): The other day
>I was talking to someone and I commented on how odd it is to write a
>library, and *still* have to learn how to use it correctly. As the
>author, at least I can change it as I learn more, but even so, I have to
>learn how to use it; even as the author I am not imbued magically with
>expert status.

Indeed. I often find myself going back to a library I wrote some time 
ago which I haven't had to interact with and then looking for the 
existing code that interacts with the library to see how best to use it. 
I think its a bit like going back to a book after a few years. Its worth 
returning because you will have forgotten some of what was so good first 
time around.

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From lbates at syscononline.com  Mon Feb 28 15:07:26 2005
From: lbates at syscononline.com (Larry Bates)
Date: Mon, 28 Feb 2005 14:07:26 -0600
Subject: Controlling Pc From Server?
In-Reply-To: <mailman.3116.1109511636.22381.python-list@python.org>
References: <mailman.3116.1109511636.22381.python-list@python.org>
Message-ID: <IOKdncUpV71u5L7fRVn-vQ@comcast.com>

What you are asking IS much more difficult that just "timing".
The Internet is a disconnected stateless medium.  I can open
a browser to a site and just leave my browser open.  Am I viewing
that site or not?  There's no way to know.  I might have minimized
the browser window and am back doing productive work (assuming
my access to the web was non-productive).

The best way I've found to do what you want is to force all
HTTP traffic through a proxy (I like Squid, but others
work as well).  The proxy cache logs can provide you with
lost of information about where people are going and how much
information they download from the site.  They cannot however
tell you how long someone was there because of what I mentioned
above.  You can see if someone is going to www.nascar.com or
www.espn.com or to some other site.  You can also block sites
quite easily if there is no legitimate reason for people to
be at that site.

Hope info helps.
Larry Bates

andrea_gavana at tin.it wrote:
> Hello Kartic & NG,
> 
>      Thank you for your prompt answer. In effect, I'm trying to work on
> a NT network of 6 PC (plus the server). Sorry to not have been clearer.
> Ideally, I'm trying to monitor the Internet activity of each client (PC)
> on this network (but I'm not a boss trying to control my emplyees, I'm just
> curious on it). I would like to know which PC is connected to Internet (by
> starting something like a "timer" for every PC, and then periodically check
> if a particular PC is connected or not). This should be done from the main
> server. 
> Did I make myself clear? Do you think it would be a huge task?
> 
> Sorry, it may be a very basic question, but thank you for your help.
> 
> Andrea.
> 
> 


From cam.ac.uk at mh391.invalid  Thu Feb 17 18:44:51 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Thu, 17 Feb 2005 23:44:51 +0000
Subject: global var
In-Reply-To: <42152b84$0$15817$636a15ce@news.free.fr>
References: <42152b84$0$15817$636a15ce@news.free.fr>
Message-ID: <cv3a9k$3eu$1@gemini.csx.cam.ac.uk>

raver2046 wrote:

> How to have a global var in python ?

"global var" will give you a global variable named "var".
-- 
Michael Hoffman


From wuwei23 at gmail.com  Tue Feb  1 20:06:05 2005
From: wuwei23 at gmail.com (alex23)
Date: 1 Feb 2005 17:06:05 -0800
Subject: The next Xah-lee post contest
In-Reply-To: <1107277633.959477.302860@f14g2000cwb.googlegroups.com>
References: <mailman.1568.1107005758.22381.python-list@python.org>
	<ctg6qn$q63$1@solaris.cc.vt.edu>
	<mailman.1572.1107009638.22381.python-list@python.org>
	<e9lpv0tk63k0v7v1lctt0d77f92ub48bl3@4ax.com>
	<20050130114008.797088857.whereU@now.com>
	<mailman.1602.1107115028.22381.python-list@python.org>
	<1107137465.973491.42050@f14g2000cwb.googlegroups.com>
	<fMpLd.101045$Jk5.4448@lakeread01>
	<sqasv0petsjfr0qb9u7e1i30n8mrjl3t78@4ax.com>
	<Q7ednbtYIue5LWLcRVn-2Q@powergate.ca>
	<1107277633.959477.302860@f14g2000cwb.googlegroups.com>
Message-ID: <1107306365.509084.47890@z14g2000cwz.googlegroups.com>


Luis M. Gonzalez wrote:
> I kind of like this guy... it's like he has a few bugs in his brain,
> but other parts are surprisingly interesting.

Which bits especially impress you, the rampant misogyny or the
unwarranted intellectual arrogance?



From http  Wed Feb 16 23:39:33 2005
From: http (Paul Rubin)
Date: 16 Feb 2005 20:39:33 -0800
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<1108570047.677348.146850@f14g2000cwb.googlegroups.com>
	<7x7jl8bhii.fsf@ruckus.brouhaha.com>
	<1108572988.341139.126020@z14g2000cwz.googlegroups.com>
	<7xd5v02l21.fsf@ruckus.brouhaha.com>
	<1108614762.026703.323850@l41g2000cwc.googlegroups.com>
Message-ID: <7xmzu3re9m.fsf@ruckus.brouhaha.com>

"Michele Simionato" <michele.simionato at gmail.com> writes:
> This was my impression too :-( The ZODB is way much easier to use so
> at the end I used just that. Apparently the bsddb stuff is more
> complicated than needed and the documentation sucks. However,
> it does satisfy your requirements of being already installed, so I
> mentioned it. I am looking too for an easy tutorial on how to do
> concurrency/transactions with it.

The sleepycat docs seemed fine back when I looked at them years ago.
I'm just not sure what the Python wrapper is supposed to do in terms
of API.


From jcribbs at twmi.rr.com  Wed Feb 16 22:47:13 2005
From: jcribbs at twmi.rr.com (Jamey Cribbs)
Date: Thu, 17 Feb 2005 03:47:13 GMT
Subject: low-end persistence strategies?
In-Reply-To: <7x7jl7g9sa.fsf@ruckus.brouhaha.com>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<Xns95FFF321AD909PaCmAnRDLM@212.27.42.70>
	<7xbrakjeu1.fsf@ruckus.brouhaha.com>
	<9sTQd.33120$XY5.31311@fe2.columbus.rr.com>
	<7x7jl7g9sa.fsf@ruckus.brouhaha.com>
Message-ID: <5tUQd.3162$LD5.1258@fe2.columbus.rr.com>

Paul Rubin wrote:
> Jamey Cribbs <jcribbs at twmi.rr.com> writes:
> 
>>Either of these server scripts would have to be running as a process
>>either on your web server or on another server on your network in
>>order for them to work.  I don't know if that would be an issue for you.
> 
> 
> Yes, that's the whole point.  I don't want to run a server process 24/7
> just to look up two or three numbers a few times a day.

Ok, I see your point now.  Well, this is off the top of my head, I 
haven't tried it, but I think you could just use KirbyBase embedded in 
your cgi script and it should work fine.  I'm kind of thinking out loud 
about this, but, let's see, if you had two user's simultaneously 
accessing your web site at the same time, that would be two instances of 
your cgi script.  If they are just looking up data, that would be two 
reads that KirbyBase would be doing against the same physical file.  It 
just opens files in read mode for that so that should work even 
concurrently.

The only time there might be trouble is if two clients try to write to 
the same table (physical file) at the same time.  When it writes to a 
file, KirbyBase opens it in append mode (r+, I think).  My guess would 
be, whichever client got there first would open the file.  The second 
client, arriving a split second later, would attempt to open the file in 
  append mode also and KirbyBase would return an exception.  If your cgi 
script caught and handled the exception, you would be fine.

Again this is off the top of my head after a long day, so I can't be 
held responsible for my ramblings.  :)

Jamey


From luismgz at gmail.com  Tue Feb  1 12:07:13 2005
From: luismgz at gmail.com (Luis M. Gonzalez)
Date: 1 Feb 2005 09:07:13 -0800
Subject: The next Xah-lee post contest
In-Reply-To: <Q7ednbtYIue5LWLcRVn-2Q@powergate.ca>
References: <mailman.1568.1107005758.22381.python-list@python.org>
	<ctg6qn$q63$1@solaris.cc.vt.edu>
	<mailman.1572.1107009638.22381.python-list@python.org>
	<e9lpv0tk63k0v7v1lctt0d77f92ub48bl3@4ax.com>
	<20050130114008.797088857.whereU@now.com>
	<mailman.1602.1107115028.22381.python-list@python.org>
	<1107137465.973491.42050@f14g2000cwb.googlegroups.com>
	<fMpLd.101045$Jk5.4448@lakeread01>
	<sqasv0petsjfr0qb9u7e1i30n8mrjl3t78@4ax.com>
	<Q7ednbtYIue5LWLcRVn-2Q@powergate.ca>
Message-ID: <1107277633.959477.302860@f14g2000cwb.googlegroups.com>


Peter Hansen wrote:
> Arthur wrote:
> > Steve Holden <steve at holdenweb.com> wrote:
> >>Would there, I wonder, be any enthusiasm for a "Best Xah Lee
impression"
> >>prize at PyCon?
> >
> > And the rules of the game, if he shows?
>
> Arthur, if Xah Lee shows up at Pycon, he most definitely will
> not be giving the best impression...
>
> -Peter


Have you visited his website?
I kind of like this guy... it's like he has a few bugs in his brain,
but other parts are surprisingly interesting.



From zerdna1 at yahoo.com  Wed Feb  9 15:15:14 2005
From: zerdna1 at yahoo.com (Andre)
Date: Wed, 9 Feb 2005 15:15:14 -0500
Subject: Help: retrieving e-mail from yahoo pop server. what's wrong?
Message-ID: <q6idnUufKYXN8pffRVn-pA@rcn.net>

  Hi guys, newbie question. I am having trouble with a script that is
supposed to login me to my account on yahoo pop server. When i do this:



import getpass, poplib, re
POPHOST = "pop.mail.yahoo.com"
POPUSER = "mylogin"
POPPASS = "mypass"
pop = poplib.POP3(POPHOST)
pop.user(POPUSER)


up to this point evertything proceeds fine, but when i do


if not POPPASS:
POPPASS = getpass.getpass("Password for %s@%s:" % (POPUSER, POPHOST))
pop.pass_(POPPASS)


I am being asked for password and after giving it getting
the following error:


POP3 Protocol Error: -ERR Error logging in. Please visit
http://mail.yahoo.com


Would appreciate any help or comments -- its my first day with Python :).
What am i doing wrong?




From just at xs4all.nl  Thu Feb  3 06:42:26 2005
From: just at xs4all.nl (Just)
Date: Thu, 03 Feb 2005 12:42:26 +0100
Subject: Reinstall python 2.3 on OSX 10.3.5?
References: <mailman.1792.1107403740.22381.python-list@python.org>
	<ctsl83$s1q$1@news1.ucsd.edu>
Message-ID: <just-077D54.12422603022005@news1.news.xs4all.nl>

In article <ctsl83$s1q$1 at news1.ucsd.edu>, Robert Kern <rkern at ucsd.edu> 
wrote:

> Christian Dieterich wrote:
> > On D? C?adaoin, Feabh 2, 2005, at 17:48 America/Chicago, 
> > moa at extrapolation.com wrote:
> > 
> >> Hi there
> >>
> >> I started a very long and roundabout process of attempting to install
> >> python 2.3.4 along side my apple-installed 2.3 system. To make a long
> >> story short, I have completely confabulated my environment ( i deleted
> >> the 2.3 binaries and so forth from the system in an attempt to start
> >> things fresh), and now I cannot figure out how to reinstall the base
> >> 2.3 Apple python distribution.
> >> Can somebody please point me in the right direction?
> > 
> > 
> > You could use
> > fink install python
> > which makes you a Python installation under /sw.
> 
> But that doesn't solve his problem, which is to restore the 
> Apple-supplied Python that he deleted.

Also: fink is evil. I wouldn't touch it with a ten-foot pole.

Just


From jello at comics.com  Fri Feb 11 09:03:45 2005
From: jello at comics.com (rzed)
Date: Fri, 11 Feb 2005 14:03:45 GMT
Subject: Python versus Perl ?
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
	<slrnd0cofg.rr5.jgrahn-nntq@frailea.sa.invalid>
	<1107726328.158314.265680@o13g2000cwo.googlegroups.com>
	<mailman.2038.1107727355.22381.python-list@python.org>
	<1grl63x.1f2tzwz1q984vpN%aleaxit@yahoo.com>
	<1108127778.811259.152240@g14g2000cwa.googlegroups.com>
Message-ID: <Xns95FA5D192514Cjreeder@63.223.5.95>

"Mauro Cicognini" <mauro.cicognini at gmail.com> wrote in
news:1108127778.811259.152240 at g14g2000cwa.googlegroups.com: 

> 
> Alex Martelli wrote:
> 
>> URK -- _my_ feeling is that we have entirely *too many* options
>> for stuff like web application frameworks, GUI toolkits, XML
>> processing, 
> ...
>>
>>
>> Alex
> 
> I entirely second that.
> 
> More, I'd heartily welcome an authoritative word on which to
> focus on for each category... I hate to see scarce resources
> wasted. 
> 

Alex also suggested that a revival of the anygui interface would be 
a Good Thing. I would certainly love to see that.

It seems to me that Python should in fact include either anygui or 
an equivalent to it as part of its core. Then to interface with a 
given GUI package, it would be necessary to create a wrapper that 
maps the wrapper's API to that standard Pythonic API. More work for 
the package maintainers, and not easy to do in some cases, but for 
the Python community it would be a huge gain. The same argument 
could be made for the anydbm interface. 

In both cases, the interface should not hinder the ability of a 
developer to access any part of the package API, which implies that 
parameters must be flexible. Maybe this is a strong use case for 
bunch/data/namespace arguments and return values.

-- 
rzed



From jlargentaye at gmail.com  Tue Feb  8 09:28:30 2005
From: jlargentaye at gmail.com (Jean  de Largentaye)
Date: 8 Feb 2005 06:28:30 -0800
Subject: Choosing the right parser for parsing C headers
In-Reply-To: <mailman.2171.1107866609.22381.python-list@python.org>
References: <1107861023.254610.14310@g14g2000cwa.googlegroups.com>
	<mailman.2161.1107861785.22381.python-list@python.org>
	<1107865641.937691.282930@g14g2000cwa.googlegroups.com>
	<cuabkq$8uh$1@sea.gmane.org>
	<mailman.2171.1107866609.22381.python-list@python.org>
Message-ID: <1107872910.313675.290170@c13g2000cwb.googlegroups.com>

That looks cool Roman, however, I'm behind a Corporate Firewall, is
there any chance you could send me a cvs snapshot?

John



From grante at visi.com  Wed Feb  2 21:04:14 2005
From: grante at visi.com (Grant Edwards)
Date: 03 Feb 2005 02:04:14 GMT
Subject: how about writing some gui to a known console application
References: <1107294520.224155.131640@f14g2000cwb.googlegroups.com>
	<41fffb59$0$21637$a1866201@visi.com>
	<pan.2005.02.01.23.06.38.622308@jerf.org>
	<1107300676.282484.10840@o13g2000cwo.googlegroups.com>
Message-ID: <4201869e$0$21643$a1866201@visi.com>

On 2005-02-01, alexrait1 <alexrait at gmail.com> wrote:

> I tried to delete this message, but I guess it was too late... or it
> didn't work for me... sorry anyway.

No worries.  Since the article didn't have a refereces or
in-reply-to header, it showed up as the first post in it's own
thread.  I later saw the post to which you intended to reply.

-- 
Grant Edwards                   grante             Yow!  The entire CHINESE
                                  at               WOMEN'S VOLLEYBALL TEAM all
                               visi.com            share ONE personality --
                                                   and have since BIRTH!!


From gsakkis at rutgers.edu  Fri Feb 11 15:07:42 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: Fri, 11 Feb 2005 15:07:42 -0500
Subject: check if object is number
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
Message-ID: <374ho0F560ughU1@individual.net>


"Steven Bethard" <steven.bethard at gmail.com> wrote in message
news:gcidnb9g_ojxnpDfRVn-tA at comcast.com...
> Is there a good way to determine if an object is a numeric type?
> Generally, I avoid type-checks in favor of try/except blocks, but I'm
> not sure what to do in this case:
>
>      def f(i):
>          ...
>          if x < i:
>              ...
>
> The problem is, no error will be thrown if 'i' is, say, a string:
>
> py> 1 < 'a'
> True
> py> 10000000000 < 'a'
> True
>
> But for my code, passing a string is bad, so I'd like to provide an
> appropriate error.
>
> I thought about calling int() on the value, but this will also allow
> some strings (e.g. '1').  I guess this isn't horrible, but it seems
> somewhat suboptimal...
>
> Ideas?
>
> Steve

The thing is that python avoids giving a strict definition of what is a 'numeric type', i.e. a
well-defined interface (the same holds for other frequently used interfaces such as 'sequence',
'mapping', 'file-like', etc). It's up to you (the user) to think of all the operations you
anticipate to be supported by each argument, attribute, etc. and define a 'numeric type checker' (or
even better, adaptor) that suits *your application*. In your example, what does your application
consider to be numeric ? Strings are definitely not, integers and floats typically are; on the other
hand, complex numbers are usually not expected, even though mathematically they are 'numeric'.  In
this case, you can write something like:
    def isNumeric(obj):
        # consider only ints and floats numeric
        return isinstance(obj,int) or isinstance(obj,float)

The bottom line is that python wisely doesn't enforce any universal numeric type ("in the face of
ambiguity, refuse the temptation to guess").

George




From jdhunter at ace.bsd.uchicago.edu  Sat Feb  5 07:07:27 2005
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Sat, 05 Feb 2005 06:07:27 -0600
Subject: Medical GUI Application With Python
In-Reply-To: <42047930.1030604@ankabt.com> (Evrim Ozcelik's message of "Sat,
	05 Feb 2005 09:43:44 +0200")
References: <42047930.1030604@ankabt.com>
Message-ID: <m3vf978b28.fsf@peds-pc311.bsd.uchicago.edu>

>>>>> "Evrim" == Evrim Ozcelik <evrim at ankabt.com> writes:

    Evrim> We are developing a medical software about PSG
    Evrim> (PolySomnoGraphy) analysis. The application takes signal
    Evrim> data from an electronic device and we will show this
    Evrim> continious signal function on the interfaces. There are
    Evrim> about 20-30 signal channels and the user selected channels
    Evrim> are shown. We want to run this application over different
    Evrim> platforms.

    Evrim> My question is:

    Evrim>    1. What must be our IDE 2. What class library for GUI
    Evrim> must be use (wxWindows, Qt, GTK, etc.)  3. Is there any GUI
    Evrim> package for visulazing signal functions (like sinozodial
    Evrim> functions) in real time; this module will behave as an
    Evrim> oscilloscope

I wrote an EEG viewer in python using pygtk for the GUI and matplotlib
for the 2D plotting (and VTK for the 3D).  It runs unchanged on OSX,
linux and win32.  You can see a few screenshots at
http://pbrain.sf.net .

The underlying 2D plotting library, matplotlib, does handle animations
(dynamic plots) and can be embedded in the GUI of your choice (Tk, WX,
GTK, FLTK and QT).  I also wrote matplotlib, as a first step in
developing the application above.  The performance of dynamic animated
plots (what you call real time) varies for different backends.  GTK is
typically fastest: on a modern P4 you can do about 50 frames/sec for
simple plots and 10-15 frames/sec for more complicated plots (images,
larger data sets).  The performance for the Tk GUI is considerably
slower.

Most people who say real time don't really mean it, they mean they
want frequent updates and should assess whether the plotting library
can support refresh rates (frames/sec) that are fast enough to be
visually pleasing and to be true to the signal plotted.  matplotlib is
not the fastest 2D python plotting library, but it is one of the most
feature complete and may be fast enough for your purposes --
http://matplotlib.sf.net .  My guess is that for 20-30 channels the
refresh rate in the current implementation will be slower than you
want, but these things are always improving since matplotlib is under
active development and there are some performance bottlenecks that
could be removed with a little work.

The examples directory which is in the src distributions has a number
of examples illustrating dynamic plots: anim.py, system_monitor.py,
dynamic_image_gtkagg.py, dynamic_image_wxagg.py, dynamic_demo.py.

JDH


From bvande at po-box.mcgill.ca  Mon Feb  7 15:16:38 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Mon, 07 Feb 2005 15:16:38 -0500
Subject: python code with indention
In-Reply-To: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
Message-ID: <4207CCA6.7050001@po-box.mcgill.ca>

Xah Lee said unto the world upon 2005-02-07 14:39:
> is it possible to write python code without any indentation?
> 
>  Xah
>  xah at xahlee.org
>  http://xahlee.org/PageTwo_dir/more.html
> 

print "It would seem it is indeed possible."
print
print "Note: although I know this, I don't consider myself an "
print "accomplished Pythoner."
print
print "In the face of that, "
print "I know enough not to post Python 'tutorials'."

Best,

Brian vdB



From Scott.Daniels at Acm.Org  Mon Feb 14 17:23:07 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Mon, 14 Feb 2005 14:23:07 -0800
Subject: Iterator / Iteratable confusion
In-Reply-To: <mailman.2565.1108413113.22381.python-list@python.org>
References: <420a5c1e$0$21630$a1866201@visi.com>	<200502131958.27410.francis.girard@free.fr>	<cuolu7$qv7$1@sea.gmane.org>
	<mailman.2565.1108413113.22381.python-list@python.org>
Message-ID: <421120ec$1@nntp0.pdx.net>

Francis Girard wrote:
> Le dimanche 13 F?vrier 2005 23:58, Terry Reedy a ?crit :
>>Iterators are a subgroup of iterables.  Being able to say iter(it) without
>>having to worry about whether 'it' is just an iterable or already an
>>iterator is one of the nice features of the new iteration design.
> 
> I have difficulties to represent an iterator as a subspecie of an iteratable 
> ... One of the result of not distinguishing them is that, at some point in
> your programming, you are not sure anymore if you have an iterator or an 
> iteratable ; and you might very well end up calling "iter()" or "__iter__()" 
> everywhere.

The point is _almost_, but not exactly unlike that.
Because the "for ... in ..." construct calls iter itself, you seldom
need (as a code user) to distinguish between iterators and iterables.
However, there will come a day when you see some code like:

     first = True
     for blunge in whatever:
         if first:
             first = False
         else:
             print 'and',
         print blunge

And you think, "I can make that clearer," so you write:

     source = iter(whatever)
     print source.next()
     for blunge in source:
         print 'and', blunge

Because of how iterables work, you know you can do this locally
without looking all around to see what "whatever" is.

--Scott David Daniels
Scott.Daniels at Acm.Org


From x2164 at mailcity.com  Thu Feb  3 01:40:07 2005
From: x2164 at mailcity.com (x2164 at mailcity.com)
Date: 3 Feb 2005 06:40:07 GMT
Subject: test_socket.py failure
References: <ctinqv0c1a@news4.newsguy.com>
	<mailman.1630.1107173295.22381.python-list@python.org>
	<ctmpr3025eh@news2.newsguy.com>
	<mailman.1723.1107313414.22381.python-list@python.org>
	<ctqpak01igc@news4.newsguy.com>
	<n5f7d2-aub.ln1@halut.solar-empire.de>
Message-ID: <ctsh0702qca@news2.newsguy.com>

Marc Christiansen <tolot at jupiter.solar-empire.de> wrote:
> x2164 at mailcity.com wrote:
> > Nick Coghlan <ncoghlan at iinet.net.au> wrote:
> >> Hmm, when the second argument is omitted, the system call looks like:
> >> 
> >> getservbyname("daytime", NULL);
> >> 
> >> Based on "man getservbyname" on my Linux PC, that should give
> >> the behaviour we 
> >> want - any protocol will match.
> >> 
> >> However:
> >> 
> >> Linux 2.6.4-52-default (Suse 9.1)
> >> Glibc 2.3.3
> >> gcc   3.3.3
> >> 
> >> So it may be that your older platform doesn't have this
> >> behaviour - I'd be very 
> >> interested in what 'man getservbyname' has to say.
> > 
> >    Just took a look at the man page for getservbyname on this
> >    system and it doesn't mention passing NULL as the second
> >    argument.  The pertinents: ;-)
> > 
> >        Linux kernel 2.6.10
> >        Glibc 2.2.5
> >        gcc   2.95.3

> Just to confuse the matter more, on my system the man page mentions
> passing NULL as the second argument and it works. Alas:
> SuSE 7.3
> Kernel 2.4.29 (vanilla)
> Glibc  2.2.4 (older than yours)
> gcc    2.95.3

> >    I'd say your probably right about there being a difference
> >    in the behaviour of getservbyname between libc 2.2.5 and 
> >    and libc-2.3.3 given the differences in man pages and 
> >    observed return values. I'll try and compare the libcs'
> >    getservbyname codes and let you know a little later in 
> >    the day.
> > 
> >    I wonder if the developers wanted to tie the python source
> >    code so closely to a glibc version and possibly gnu-libc
> >    specific?

> Perhaps SuSE did patch the glibc...

> Saluton
>   Marc



     hey Marc


     Oh man, not another problem that's just happening to
     me, again. :-)

     We all are still talking about python 2.4 aren't we?  I'm
     really running out of options on this.

     My manual page for getservbyname is dated "22 April 1996"
     and i think that it wasn't installed by glibc-2.2.5.  The
     info page for getservbyname which was installed by 2.2.5
     doesn't mention being able to pass NULL as a 'PROTO'
     argument.

     As for my saying above that i would take a look at the
     libcs' code for getservbyname, well, let's just say
     i won't be bantering about that idea so readily anytime
     soon. :-)

     What i believe happens in glibc-2.3.3 is that getservbyname
     is generated by two files: inet/getsrvbynm.c which contains
     a number of '#define's that then '#include's the file 
     nss/getXXbyYY.c which is sort of a template function that
     the '#define's fill out.  If your use to reading it
     nss/getXXbyYY.c probably is easy reading, but, for ego's sake,
     let's just say that i'm not use to reading it.  There's
     also  getsrvbynm_r.c and getXXbyYY_r.c for the reentrant
     versions of getservbyname plus some references to nss and
     nis versions of getservbyname.  Of course its also possilble
     that where i said "What i believe happens" at the beginning
     of this paragraph could be read as "I'm confused about what
     happens" and i don't mean that as critic of glibc.

     Marc, it is possible that there was a change between 
     glibc-2.2.4 and 2.2.5 that would account for the 
     difference in behaviour.  I think i'll write a little
     test program in C to check out getservbyname's return
     values in a little more controled environment.  I'll
     post the results tomorrow.

     
     pete jordan
     x2164   mailcity com


     

-- 
	............



From skip at pobox.com  Thu Feb 10 17:32:25 2005
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 10 Feb 2005 16:32:25 -0600
Subject: hard_decoding
In-Reply-To: <420AA934.6050206@mayo.edu>
References: <420AA934.6050206@mayo.edu>
Message-ID: <16907.57593.417911.696805@montanaro.dyndns.org>


    Tamas> Do you have a convinient, easy way to remove special charachters
    Tamas> from u'strings'?

    Tamas> Replacing:
    Tamas> ?????? 	=> A
    ... etc ...

See if my latscii codec works for you:

    http://www.musi-cal.com/~skip/python/latscii.py

Skip


From tom.willis at gmail.com  Tue Feb 22 20:38:28 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Tue, 22 Feb 2005 20:38:28 -0500
Subject: Dealing with config files what's the options
Message-ID: <b54d0489050222173810d9ac75@mail.gmail.com>

How are the expert pythoneers dealing with config files?

Is there anything similair to .net's config files or java's .properties?

A quick search on google didn't return anything that looked useful,
and I almost would expect to see some module that would be for dealing
with config information.

I can think of at least one way to do it, but I'm sure there are
shortcomings I can't see yet, and I'd rather use something someone
smarter than me has written.

I see in the logging module that there's stuff to handle configs but
seems kind of odd to have to import logging to get your config
information

Any ideas?

have I used the word config enough in this message? :)

-- 
Thomas G. Willis
http://paperbackmusic.net


From ods at strana.ru  Thu Feb 10 09:43:01 2005
From: ods at strana.ru (Denis S. Otkidach)
Date: Thu, 10 Feb 2005 17:43:01 +0300
Subject: sre is broken in SuSE 9.2
In-Reply-To: <1108036791.098550.306310@g14g2000cwa.googlegroups.com>
References: <mailman.2299.1108029731.22381.python-list@python.org>
	<1108036791.098550.306310@g14g2000cwa.googlegroups.com>
Message-ID: <20050210174301.3885a45d.ods@strana.ru>

On 10 Feb 2005 03:59:51 -0800
"Serge Orlov" <Serge.Orlov at gmail.com> wrote:

> > On all platfroms \w matches all unicode letters when used with flag
> > re.UNICODE, but this doesn't work on SuSE 9.2:
[...]
> I can get the same results on RedHat's python 2.2.3 if I pass re.L
> option, it looks like this option is implicitly set in Suse.

Looks like you are right:

>>> import re
>>> re.compile(ur'\w+', re.U).match(u'\xe4')
>>> from locale import *
>>> setlocale(LC_ALL, 'de_DE')
'de_DE'
>>> re.compile(ur'\w+', re.U).match(u'\xe4')
<_sre.SRE_Match object at 0x40375560>

But I see nothing related to implicit re.L option in their patches and
the sources themselves are the same as on other platforms.  I'd prefer
to find the source of problem.

-- 
Denis S. Otkidach
http://www.python.ru/      [ru]


From enleverlesO.OmcO at OmclaveauO.com  Fri Feb  4 15:19:03 2005
From: enleverlesO.OmcO at OmclaveauO.com (Do Re Mi chel La Si Do)
Date: Fri, 4 Feb 2005 21:19:03 +0100
Subject: Thread in python
References: <1107533540.641969.191940@z14g2000cwz.googlegroups.com>
Message-ID: <4203ddc5$0$6585$8fcfb975@news.wanadoo.fr>

Hi !

Look the smart/fun use of threads make by
    http://candygram.sourceforge.net

It's good for to know...


@-salutations
-- 
Michel Claveau












From serpent17 at gmail.com  Tue Feb  1 17:00:29 2005
From: serpent17 at gmail.com (Newbie)
Date: 1 Feb 2005 14:00:29 -0800
Subject: web camera or else ? 15-30 fps processing of camera videos.
Message-ID: <1107295229.657375.318750@o13g2000cwo.googlegroups.com>

I am doing some robotics projects but my main area of interest is
trying out several algorithms for the processing of the stream of data
coming from the video.

I am wondering what type of camera I should invest in. Either I could
buy a web cam and hope I can find a driver I could either modify or
use. i.e. every frame is somehow stored on the computer automagically
or I could buy a camera not unlike the AVRcam
(http://www.jrobot.net/Projects/AVRcam.html) or the CMUcam and try to
do the processing once the data has been streamed to the nearest
computer ? or should I use an expensive video card, some CCTV camera
and a frame grabber to digitize photos so they can be processed
afterwards. I expect my processing algorithms to handle at least 15
frames per second framerate once they are working ont the final set-up.

My constraints are that I would like to avoid as much as possible
complex set-ups even if that means buying a more expensive camera
set-up. For the prototyping, I would like to try my algorithms out
using a combination of python and matlab (all very slow) and then
expect the same architecture (image files location and flow) with
speedier set-up like python+psyco or C. All the processing would be
done on a computer dedicated for that. Windows or Linux are possible.

Any help from either comp.robotics.misc or c.l.p would be helpful.
Thanks in advance,

Jake.



From tdelaney at avaya.com  Wed Feb  9 17:04:19 2005
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Thu, 10 Feb 2005 09:04:19 +1100
Subject: strange behaviour with decorators.
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE0252032C@au3010avexu1.global.avaya.com>

Antoon Pardon wrote:

> Ah, yes, the penny dropped. The try: except where there because
> originally there were other statements I wanted to test and I
> didn't want the raise exception by the inc(-2) stop the script.
> I completely forget to consider it would also catch the
> error I was expecting.

A very good example of why you should (almost) never use a bare except:
...

Tim Delaney


From lkirsh at cs.ubc.ca  Thu Feb 24 18:32:03 2005
From: lkirsh at cs.ubc.ca (Lowell Kirsh)
Date: Thu, 24 Feb 2005 15:32:03 -0800
Subject: duplicate file finder
In-Reply-To: <3vvr11dvtbu030065pj9ptmj1i2eelodq8@4ax.com>
References: <cveqr1$a47$1@mughi.cs.ubc.ca>
	<nftl11tfimccjktktnj7oohbcvkfcjpe7f@4ax.com>
	<cvhjvj$142$1@mughi.cs.ubc.ca>
	<3vvr11dvtbu030065pj9ptmj1i2eelodq8@4ax.com>
Message-ID: <cvlo5j$df4$1@mughi.cs.ubc.ca>

It looks pretty good, but I'll have to take a better look later. Out of 
curiosity, why did you convert the first spaces to pipes rather than add 
the code as an attachment?

Lowell

Christos TZOTZIOY Georgiou wrote:
> On Wed, 23 Feb 2005 01:56:02 -0800, rumours say that Lowell Kirsh
> <lkirsh at cs.ubc.ca> might have written:
> 
> 
>>Good idea about hashing part of the file before comparing entire files. 
>>It will make the script longer but the speed increase will most likely 
>>make it worth it.
> 
> 
> My dupefind module was one of the first modules I wrote in python (it was a
> shell script once...), so it's not appropriate to post.  However, rewriting it
> was in my RSN list; after your post, I said, "what the heck" :)
> 
> I wouldn't describe it as /clean/ Python code, so any comments on style,
> methodology (and of course, bugs!) are mostly welcome.  If you have any ideas
> how to make it more "Pythonic" in style, perhaps we can even send it to ASPN.
> On the upside, it's a good demo of Python dynamism and therefore power.
> 
> All first spaces are converted to pipe symbols to keep code indents, and sorry
> for the assignment operators lacking spacing at the left, but it helped me know
> what I meant in C, so I kept the habit in Python.
> 
> 
> 
> """dupefinder.py -- a module to find duplicate files.
> 
> find_duplicate_files(*paths):
> .   A function returning an iterable of lists of duplicate files
> .   To be used as
> .   for duplicate_files in dupefinder.find_duplicate_files(dir1, dir2...):
> .       # process every group of duplicates
> """
> 
> import os, md5, errno, sys
> 
> IGNORED_ERROR_CODES= frozenset( [errno.EACCES, errno.ENOENT] )
> 
> class File(object):
> .   """A wrapper for files to facilitate their comparison.
> .   
> .   Interface:
> .   -   .get_hash(level) returns appropriate key for the current cmp level
> .   -   .filename
> .   -   .size"""
> 
> .   __slots__= "filename", "size", "_hashes",
> 
> .   def __init__(self, filename):
> .       self.filename= filename
> .       self.size= os.path.getsize(filename)
> .       if self.size == 0:
> .           self._hashes= [0, None, None]
> .       else:
> .           self._hashes= [self.size]
> 
> .   def __repr__(self):
> .       return "%s('%s')" % (self.__class__.__name__, self.filename)
> 
> .   def get_hash(self, level):
> .       """Return appropriate key for level of comparison.
> .       level == 0 returns file size
> .       level == 1 returns hash of first few kb
> .       level == 2 returns md5 sum of whole file"""
> .       if level >= len(self._hashes):
> .           if 1 <= len(self._hashes):
> .               self._hashes.append(self._get_partial_hash())
> .           if 2 <= len(self._hashes):
> .               self._hashes.append(self._get_full_hash())
> .       return self._hashes[level]
> 
> .   def _get_partial_hash(self):
> .       fp= open(self.filename)
> .       try:
> .           return hash(fp.read(8192))
> .       finally:
> .           fp.close()
> 
> .   def _get_full_hash(self):
> .       fp= open(self.filename, "rb")
> .       full_hash= md5.new()
> .       while 1:
> .           data= fp.read(65536)
> .           if not data: break
> .           full_hash.update(data)
> .       fp.close()
> .       return full_hash.digest()
> 
> class GenericFilesDict(dict):
> .   """A virtual wrapper for the dictionaries of file comparisons.
> .   Not to be used on its own, but through subclassing.
> .   
> .   Each subclass should define a _level class attribute to be used with the
> .   File.get_hash method, and a _next_class attribute pointing to the class
> .   managing the next level comparisons."""
> .   __slots__= ()
> 
> .   def add_file(self, fileobj):
> .       """Add a File object to self keyed by the appropriate key based on
> .       self._level. If another file object exists in the same spot, replace it
> .       by a _next_level_class instance containing the pre-existing and new file
> .       obj."""
> 
> .       this_hash= fileobj.get_hash(self._level)
> 
> .       try:
> .           result = self[this_hash]
> .       except KeyError:
> .           self[this_hash]= fileobj
> .           return
> 
> .       try: # there was something in slot [this_hash]
> .           result.add_file(fileobj) # so add fileobj to it
> .       except AttributeError: # it has no add_file method, so it's a File
> .           _= self[this_hash]= self._next_class() # make an instance
> .           _.add_file(result) # add pre-existing
> .           _.add_file(fileobj) # add new
> 
> .   def __repr__(self):
> .       return "%s%s" % (self.__class__.__name__, dict.__repr__(self))
> 
> .   def __iter__(self):
> .       "Return all instances of SameFiles (subclass of list)."
> .       for item, value in self.iteritems():
> .           try: _next_class= value._next_class
> .           except AttributeError: continue
> .           if _next_class is None:
> .               yield value
> .           else:
> .               for item in value:
> .                   yield item
> 
> class SameFiles(list):
> .   "A list of duplicate files."
> .   __slots__= ()
> .   _level= 3
> .   _next_class= None # search stops here
> 
> .   def add_file(self, fileobj):
> .       self.append(fileobj)
> 
> class FilesByFullHash(GenericFilesDict):
> .   """A dictionary keyed on md5 hash of whole file.
> 
> .   The algorithm assures that all File objects in this dict
> .   have the same size and the same hash of first few kiB."""
> .   __slots__= ()
> .   _level= 2
> .   _next_class= SameFiles
> 
> class FilesByPartialHash(GenericFilesDict):
> .   """A dictionary keyed on hosh of first few kiB of file.
> 
> .   The algorithm assures that all File objects in this dict
> .   have the same size."""
> .   __slots__= ()
> .   _level= 1
> .   _next_class= FilesByFullHash
> 
> class FilesBySize(GenericFilesDict):
> .   """A dictionary keyed on file size."""
> .   __slots__= ()
> .   _level= 0
> .   _next_class= FilesByPartialHash
> 
> def find_duplicate_files(*directories):
> .   """Find all duplicate files in the specified directories.
> 
> .   The returned object can be iterated on, yielding a list of
> .   duplicate files every time."""
> .   dupefinder= FilesBySize()
> ##  count= 0
> .   for path in directories:
> .       for dirname, dirnames, filenames in os.walk(path):
> .           for filename in filenames:
> .               try:
> .                   dupefinder.add_file(File(os.path.join(dirname, filename)))
> .               except EnvironmentError, exc:
> .                   if exc.errno not in IGNORED_ERROR_CODES: # deleted or b0rken
> symlink
> .                       raise
> ##              count += 1
> ##              if count & 15 == 0:
> ##                  sys.stderr.write("\r%d" % count)
> 
> .   return dupefinder
> 
> def pprint(obj, level=0):
> .   """For testing purposes."""
> .   indent= "  "*level
> .   if isinstance(obj, File):
> .       print `obj`
> .   elif isinstance(obj, list):
> .       print "list"
> .       for subobj in obj:
> .           print indent, "-", repr(subobj)
> .   else:
> .       print obj.__class__.__name__
> .       for key, subobj in obj.iteritems():
> .           print indent, "+(%r)" % key,
> .           pprint(subobj, level+1)
> 
> if __name__=="__main__":
> .   result= find_duplicate_files(*sys.argv[1:])
> .   import pprint
> .   for group in result:
> .       pprint.pprint(group)
> 


From steven at lczmsoft.com  Sat Feb 26 08:07:54 2005
From: steven at lczmsoft.com (steven at lczmsoft.com)
Date: 26 Feb 2005 05:07:54 -0800
Subject: Problem When Unit Testing with PMock
Message-ID: <1109423274.660110.156140@f14g2000cwb.googlegroups.com>

Hi,

Anyone was using pmock for unit testing with python?  I met a problem
and hope someone to help me.  For short, the pmock seems can not mock a
iterator object.

For example, the tested object is foo, who need to send message to
another object bar.  So, to test the foo, I need mock a mockBar.  But
the bar is a iterator, the foo use the bar in this way:

     foo.method(self, bar):
         for n in bar:
             do somthing
              ...
my purpose is create a mockBar and pass this mock object to
foo.method(), but this ideal simply does not work. Python will complain
that calling on an uniteraterable object.  I'v already set anything
like mockBar.expects(__iter__()) and mockBar.expects(next()).

Does anyone has some clues?

-
narke



From danperl at rogers.com  Fri Feb  4 01:12:50 2005
From: danperl at rogers.com (Dan Perl)
Date: Fri, 4 Feb 2005 01:12:50 -0500
Subject: advice needed for simple python web app
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
	<7xr7jxnddh.fsf@ruckus.brouhaha.com>
	<OqCdnWO5h9_ynp7fRVn-uA@rogers.com>
	<7xis58c1lw.fsf@ruckus.brouhaha.com>
Message-ID: <TOWdndFTsJD1j57fRVn-og@rogers.com>


"Paul Rubin" <http://phr.cx at NOSPAM.invalid> wrote in message 
news:7xis58c1lw.fsf at ruckus.brouhaha.com...
> "Dan Perl" <danperl at rogers.com> writes:
>> The application is just something I'm playing with to learn a little bit 
>> on
>> web apps.  It uses an HTML form to send an email.  The form takes inputs
>> like the From:, To: and Subject: fields and a text field.
>
> Be careful of exposing that script to the internet.  Spammers will
> exploit it.

Do you mean publishing the script for other people to copy it or exposing 
the web app so that other people may access it?  Don't worry anyway, I won't 
do either and I'm running 2 firewalls on my PC.  It would be really naive to 
expose the web app, wouldn't it? 




From dotpyFE at gmail.com  Sat Feb 26 20:18:40 2005
From: dotpyFE at gmail.com (Lucas Raab)
Date: Sun, 27 Feb 2005 01:18:40 GMT
Subject: weird strings question
In-Reply-To: <cvol1v$e1v$1@news1.ucsd.edu>
References: <ImQTd.7095$Ba3.1886@newsread2.news.atl.earthlink.net>
	<cvol1v$e1v$1@news1.ucsd.edu>
Message-ID: <Qd9Ud.782$wy3.450@newsread3.news.atl.earthlink.net>

Robert Kern wrote:
> Lucas Raab wrote:
> 
>> Is it possible to assign a string a numerical value?? For example, in 
>> the string "test" can I assign a number to each letter as in "t" = 45, 
>> "e" =  89, "s" = 54, and so on and so forth??
> 
> 
> Use a dictionary with the strings as keys.
> 
> string2num = {}
> string2num['t'] = 45
> string2num['e'] = 89
> 
> etc.
> 

Thanks. That's what I was looking for, but was just unsure exactly how 
to proceed.


From bdesth.quelquechose at free.quelquepart.fr  Mon Feb 14 14:29:26 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 14 Feb 2005 20:29:26 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <jn230NTJyLECFwlQ@objmedia.demon.co.uk>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr>
	<mailman.2527.1108384715.22381.python-list@python.org>
	<4210a3d9$0$23451$626a14ce@news.free.fr>
	<mailman.2530.1108387404.22381.python-list@python.org>
	<jn230NTJyLECFwlQ@objmedia.demon.co.uk>
Message-ID: <4210f994$0$20570$636a15ce@news.free.fr>

Stephen Kellett a ?crit :
> In message <mailman.2530.1108387404.22381.python-list at python.org>, Simon
> Brunning <simon.brunning at gmail.com> writes
> 
>>On Mon, 14 Feb 2005 14:12:57 +0100, bruno modulix <onurb at xiludom.gro> wrote:
>>
>>>Why do you hate Perl and Ruby community that much ?
>>
>>Oh, I don't. But fair's fair - we've carried our share of the burden, surely?
> 
> 
> He is already badgering the Ruby guys. Without about as much success as
> this newsgroup. When he doesn't get what he wants a post along the lines
> of
> 
>         "XXXX lang is only suited to small projects and not real world
>         industrial projects"
> or
>         "the community doesn't care"
> will appear.
> 
> Its quite incredible - in the time he has spent complaining he could
> have done his own research and written some useful tools. I know how
> long it took me to write my first major C++ app that interfaced with
> Python and Ruby. It was less time than he has spent complaining - and
> that included rebuilding Python/Ruby, inspecting the source for what I
> needed and performing many experiments before I succeeded.

Just google for Ilias Lazaridis... You may observe that our new troll 
has already played the same game on many newsgroups, forums and whatever...


> Stephen


From Peter.Vandersteegen at gmail.com  Wed Feb 16 10:05:48 2005
From: Peter.Vandersteegen at gmail.com (peter)
Date: 16 Feb 2005 07:05:48 -0800
Subject: adding new functionality to a function non-intrusively!
References: <1108564620.657526.301320@g14g2000cwa.googlegroups.com>
	<1108565730.135442.174550@l41g2000cwc.googlegroups.com>
Message-ID: <1108566348.660335.224170@g14g2000cwa.googlegroups.com>

Hello

I indeed also rely on your idea.
My problem however is: is has to be non-intrusively in both ways.

In your example, it would indeed not break the old code which relies on
myfunction
but my problems is: I also do not want to change the code of the
'before' myfunction.

so my problem in fact  is:
BEFORE:
def myfunction(a,b):
      return (a+b)
AFTER:
def myfunction(a,b, op="add"):
       if (op == "add"):
              # some function which calls the old code for myfunction

kind regards



From cam.ac.uk at mh391.invalid  Fri Feb 18 21:38:50 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sat, 19 Feb 2005 02:38:50 +0000
Subject: Trouble with mysql-python 1.2.0 on Solaris 8 sparc
In-Reply-To: <1108755202.574729.293610@g14g2000cwa.googlegroups.com>
References: <1108755202.574729.293610@g14g2000cwa.googlegroups.com>
Message-ID: <cv68rt$lfb$1@gemini.csx.cam.ac.uk>

Alec Wysoker wrote:
> I need to be able to access mySQL 4.0 and 4.1 databases from python.  I
> was hoping to find mysql-python 1.2.0 already built for Sparc, but no
> such luck.

Try version 1.0.1.
-- 
Michael Hoffman


From claird at lairds.us  Sun Feb 13 09:08:04 2005
From: claird at lairds.us (Cameron Laird)
Date: Sun, 13 Feb 2005 14:08:04 GMT
Subject: Considering python - have a few questions.
References: <eZAPd.21496$Ka6.148459@news1.mts.net>
	<m04u011nhb1uvkhtctu37o4ug0j8efuebh@4ax.com>
Message-ID: <d504e2-c15.ln1@lairds.us>

In article <m04u011nhb1uvkhtctu37o4ug0j8efuebh at 4ax.com>,
Tim Roberts  <timr at probo.com> wrote:
>"Heather Stovold" <h_stovold at hotmail.com> wrote:
>>
>>I need to make a GUI interface.  Some of the screens need to be dynamically
>>created, with the screen information in a database. Included in the database
>>will be pictures (.gif or .jpg) that need to be displayed.  A second
>>database would hold the user's data.   I would also need to be able to print
>>reports made in a similar fashion.
>>
>>I would want the program to run in Windows for sure.  If it could work on a
>>Mac and other systems, that would be a plus.  I would really love it to be
>>able to also be able to be run on the internet (allowing more than one
>>person access to the data), but I've never done anything other than basic
>>web pages with a web page editor (dreamweaver.)
>>
>>btw - I have the database designed (and the program info database filled) in
>>Access....
>>
>>I don't mind working hard to learn how to do it....   I just want to know if
>>Python is a good choice or not!
>
>Python is a great choice.  Personally, given your requirements, I would
>make this a web application.  In my opinion, HTML is the easiest way to
>generate a user interface on-the-fly.  With a package like CherryPy, you
>get a web server built-in.  You fire up the server in the background, and
>bring up Internet Explorer as "your" user interface.
			.
			.
			.
Me, too.  Ms. Stovold, while I imagine that you're not thinking
in terms of a Web application, I suspect you're likely to find
Tim's advice very satisfying.  Given your background, as you
describe it, I strongly urge you at least to experiment with
simple dynamically-generated Web pages.  Don't hesitate to start
with CGI, as the easiest way to achieve quick results.


From ola.natvig at infosense.no  Tue Feb  1 04:47:25 2005
From: ola.natvig at infosense.no (Ola Natvig)
Date: Tue, 01 Feb 2005 10:47:25 +0100
Subject: find isset() php function equivalent in python
In-Reply-To: <41ff4e18$0$260$edfadb0f@dread12.news.tele.dk>
References: <41ff435f$0$18835$8fcfb975@news.wanadoo.fr>
	<c6u3d2-b0q.ln1@pluto.i.infosense.no>
	<41ff4e18$0$260$edfadb0f@dread12.news.tele.dk>
Message-ID: <dqv3d2-ngq.ln1@pluto.i.infosense.no>

Max M wrote:
> Ola Natvig wrote:
> 
>> Olivier Noblanc ATOUSOFT wrote:
>>
>>> Hello
>>>
>>>
>>> What is the equivalent function of php isset() in python
>>
>>
>> try:
>>     if variable:
>>         # isset
>>         pass
>> except NameError:
>>     # not set
>>     pass
>>     
> 
> 
> you could use:
> 
>  >>> 'variable' in vars()
> 
> But be aware that it is bad bad practice to do it like that.
> 
> If you need variables that you don't know that name of, you should put 
> them in a dictionary. They are made for that exact purpose.
> 
>  >>> unkown_vars = {}
>  >>> unkown_vars['variable'] = 42
>  >>> 'variable' in unkown_vars
> True
> 
> 

If it's a greater possibility that the 'variable' are set than it's not 
you will get better performance when using:

try:
	print unknown_vars['variable']
except KeyError:
	print 'variable are not set'

istead of

if 'variable' in unknown_vars:
	print unknown_vars['variable']
else:
	print 'variable are not set'

You could even use

print unknown_vars.get('variable', 'variable are not set')

dictionary.get(key, default) returns the default if key are not located 
in the dictionary, I'm not sure if the function uses the try / except 
KeyError aproach or what it uses.

-- 
--------------------------------------
  Ola Natvig <ola.natvig at infosense.no>
  infoSense AS / development


From PDunce at somewhere.invalid  Tue Feb  8 20:18:59 2005
From: PDunce at somewhere.invalid (Python Dunce)
Date: 09 Feb 2005 01:18:59 GMT
Subject: Dumb glob question
References: <Xns95F6E0341861PDuncesomewhereinval@204.153.244.156>
	<1107770445.983406.64730@g14g2000cwa.googlegroups.com>
	<Xns95F6C256797C0PDuncesomewhereinval@204.153.244.156>
	<cu95qn$9ej$1@gemini.csx.cam.ac.uk>
Message-ID: <Xns95F7C48473EB1PDuncesomewhereinval@204.153.244.156>

Michael Hoffman <cam.ac.uk at mh391.invalid> wrote in comp.lang.python:

> Python Dunce wrote:
> 
>> So if I happen 
>> to be processing 'foo [bar].par2'
>> 
>> glob.glob(filename[:-5]+'.*par2')
>> 
>> doesn't return anything.  Using
>> win32api.FindFiles(filename[:-5]+'.*par2') works perfectly, but I don't
>> want to rely on win32api functions.  I hope that made more sense :).
> 
> If you look in the source for glob.py, you will find that it calls the
> fnmatch module, and this is the docstring for fnmatch.translate():
> 
>      """Translate a shell PATTERN to a regular expression.
> 
>      There is no way to quote meta-characters.
>      """
> 
> So you cannot do what you want with glob.
> 
> You can replace [] with ? in your glob string, if you are sure that
> there won't be other characters there. That's a bit of a hack, and I
> wouldn't do it.
> 
> In my mind it would probably be best to do:
> 
> re_vol = re.compile(re.escape(startpart) + ".*vol.*")
> lst = [filename for filename in os.listdir(".") if
> re_vol.match(filename)] 
> 
> I changed "list" to "lst" because the former shadows a built-in.

Thanks, that should do the trick!  I had tried basically the same thing 
once but I was getting back empty lists.  I think it was just a brain fart 
involving a case sensitive regex that didn't match the files I was testing 
it on :/.


From fperez.net at gmail.com  Wed Feb 16 16:42:36 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Wed, 16 Feb 2005 14:42:36 -0700
Subject: huge help for interactive python
References: <loom.20050216T213315-348@post.gmane.org>
Message-ID: <cv0ejb$l0k$1@sea.gmane.org>

David S. wrote:

> If you are using ipython on Windows then you will
> have made sure you have Gary Bishop's readline
> library as instructed in the ipython install
> directions found at:
> http://ipython.scipy.org/

[...]

Thanks, very handy.  I just reposted your message to the ipyhton-users list,
since others may find it useful there.

Regards,

f



From steve at holdenweb.com  Mon Feb 28 10:30:37 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 28 Feb 2005 09:30:37 -0600
Subject: Text To Speech with pyTTS
In-Reply-To: <4221b0b6$0$1998$afc38c87@news.optusnet.com.au>
References: <4221b0b6$0$1998$afc38c87@news.optusnet.com.au>
Message-ID: <4223391D.50206@holdenweb.com>

Mike P. wrote:

> Hi,
> I was wondering if anyone has had any luck with the python text to speech
> (pyTTS) module available on Sourceforge:
> http://sourceforge.net/projects/uncassist
> 
> I have followed the tutorial for pyTTS at:
> http://www.cs.unc.edu/~parente/tech/tr02.shtml
> 
> Using the first simple speech example:
> 
> import pyTTS
> 
> tts = pyTTS.Create()
> tts.Speak("Hello World!")
> 
> I get the following error on the call to pyTTS.Create()
> 
> C:\Program Files\Python23\Lib\site-packages\pyTTS>python
> ActivePython 2.3.2 Build 232 (ActiveState Corp.) based on
> Python 2.3.2 (#49, Nov 13 2003, 10:34:54) [MSC v.1200 32 bit (Intel)] on
> win32
> Type "help", "copyright", "credits" or "license" for more information.
> 
>>>>import pyTTS
>>>>tts = pyTTS.Create()
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "C:\Program Files\Python23\Lib\site-packages\pyTTS\__init__.py", line
> 28, in Create
>     raise ValueError('"%s" not supported' % api)
> ValueError: "SAPI" not supported
> 
> 
> I followed the instructions in the tutorial in order and installed the
> required packages in the following order, given that I already had an
> ActiveState Python 2.3 installation under Windows XP.
> 
> 1) wxPython2.5-win32-unicode-2.5.3.1-py23.exe (didn't already have this and
> some of the pyTTS demos need it)
> 
> 2) Microsoft SAPI 5.1 (SAPI5SpeechInstaller.msi)
> 3) Extra Microsoft Voices (SAPI5VoiceInstaller.msi)
> 4) pyTTS-3.0.win32-py2.3.exe (pyTTS for Python 2.3 under windows)
> 
> I ran the example and it didn't work. I didn't initially install Mark
> Hammond's
> Python win32all extensions, because they already come with ActiveState
> Python.
> So I tried installing the win32all (win32all-163.exe) package just in case,
> but I still
> get the SAPI not supported error.
> 
> Anyone get this working - any suggestions? Or am I missing something
> obvious?
> 
> Thanks In Advance.
> 
> Mike P.
> 
> 
I got the "SAPI not supported" error until I installed the 
SpeechInstaller and VoiceInstaller components, after which everything 
worked fine for me. (Win2K SP4, Python 2.4 plus win32 extentions).

regards
  Steve


-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From mcfletch at rogers.com  Fri Feb 18 11:55:27 2005
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Fri, 18 Feb 2005 11:55:27 -0500
Subject: 3d graphics
In-Reply-To: <20050218153917.GA53264@aquameta.com>
References: <20050218153917.GA53264@aquameta.com>
Message-ID: <42161DFF.2030605@rogers.com>

Eric Hanson wrote:

>Hi,
>
>I'm interested in doing some work with 3d graphics
>visualizations of XML/RDF data in Python.  I know Python is
>strong on the XML front but what about 3d graphics?  Is there a
>graphics library out there with graphics library with a fairly
>gradual learning curve?  Do people actually use Python for games
>programming and the likes?
>  
>
Python's got a few 3D libraries:

    http://www.vrplumber.com/py3d.py

You'll probably be most interested in a scenegraph/retained-mode 
renderer, listed here:

    http://www.vrplumber.com/py3d.py?category=retained

depending on your background, VPython (or VTK/MayaVi if you're more from 
a science background) might be a good starting point.  Soya or Panda 
seem more involved, but probably take you a little further toward 
game-like engines.  Pivy or OpenGLContext (both being Inventor-style 
scenegraphs) are more toolkits for developers to build applications, 
they generally let you load and work with objects readily, but they 
aren't trying to provide "jumping, shooting and exploding" features 
out-of-the-box.  Then there are the full (normally C++) game engines 
with Python wrappers, likely a steeper learning curve, but once you get 
up and running they should give you fairly easy going for writing a game.

Most (commercial) games that use Python follow that last model, a C++ 
engine that uses Python for scripting and extensions.  AFAIK there 
hasn't been a (commercial) 3D game (graphics engine) written with Python 
as the primary implementation language (for the graphics engine).  Of 
the retained-mode renderers on that page, only a handful are primarily 
Python code; it takes a lot of work to get a decently performing 
scenegraph engine written in Python.

HTH,
Mike

 
________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com
                              PyCon is coming...



From littlejohn.75 at news.free.fr  Mon Feb 14 15:11:20 2005
From: littlejohn.75 at news.free.fr (F. Petitjean)
Date: 14 Feb 2005 20:11:20 GMT
Subject: changing __call__ on demand
References: <cuo0e1$4l2$1@lnx107.hrz.tu-darmstadt.de>
	<tSMPd.263$7O6.88@fe61.usenetserver.com>
Message-ID: <421105e8$0$374$626a14ce@news.free.fr>

Le Sun, 13 Feb 2005 13:19:03 -0500, Hans Nowak a ?crit :
> Stefan Behnel wrote:
>> Hi!
>> 
>> This somewhat puzzles me:
>> 
>> Python 2.4 (#1, Feb  3 2005, 16:47:05)
>> [GCC 3.3.4 (pre 3.3.5 20040809)] on linux2
>> Type "help", "copyright", "credits" or "license" for more information.
>> 
>> .>>> class test(object):
>> ...   def __init__(self):
>> ...     self.__call__ = self.__call1   # self.__call__ is bound
>> ...   def __call1(self):
>> ...     print 1
>> ...   def __call__(self):   # self.__call__ is rebound
>> ...     print 2
>> ...
>> .>>> t = test()
>> .>>> t()
>> 2
2 because the last defined __call__ wins. Try dir(t)
>> 
>> If I take out the __call__ method completely and only set it in 
>> __init__, I get a TypeError saying that test is not callable.
This seems logical.
> 
> Note that it works just fine if you don't use a new-style class:
> 
> >>> class Test:
> ...     def __init__(self):
> ...         self.__call__ = self.foobar
> ...     def foobar(self, *args, **kwargs):
> ...         print "Called with:", args, kwargs
> ...
> >>> t = Test()
> >>> t()
> Called with: () {}
> >>> t(3, 4)
> Called with: (3, 4) {}
> >>> t(42, x=0)
> Called with: (42,) {'x': 0}
Are you sure that if you add a __call__() method, it will still work
fine ?


Regards
> 


From nbbalane at gmail.com  Wed Feb  2 02:24:18 2005
From: nbbalane at gmail.com (jrlen balane)
Date: Wed, 2 Feb 2005 15:24:18 +0800
Subject: how to separate hexadecimal
In-Reply-To: <2cad209005020123107fb43105@mail.gmail.com>
References: <2cad209005020123107fb43105@mail.gmail.com>
Message-ID: <2cad2090050201232427cb97f2@mail.gmail.com>

i have a 4 digit hex number (2 bytes) and i want to separate it into 2
digit hex (1 byte each) meaning i want to get the upper byte and the
lower byte since i am going to add this two.
how am i going to do this?
should i treat it just like a normal string?
please help, thanks.

ex. hexa = '0x87BE"  # what i want to do is:
      a = 0x87, b = 0xBE    # so that i could do this:
      c = a + b            #which should be equal to 0x145


From sjmachin at lexicon.net  Sat Feb 19 18:47:39 2005
From: sjmachin at lexicon.net (John Machin)
Date: 19 Feb 2005 15:47:39 -0800
Subject: exercise: partition a list by equivalence
In-Reply-To: <37pb5jF5fnfivU1@individual.net>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<1108814276.680736.264380@l41g2000cwc.googlegroups.com>
	<37pb5jF5fnfivU1@individual.net>
Message-ID: <1108856859.576211.178480@l41g2000cwc.googlegroups.com>


Reinhold Birkenfeld wrote:
> Xah Lee wrote:
> > here's the answer to the partition by equivalence exercise.
>
> Your Python solution is, as expected, wrong (try with
> [[10, 8], [7, 3], [1, 7], [5, 4], [2, 2], [3, 8], [7, 10], [2, 3],
[6,
> 10], [3, 2]]
> for example).
>
> The solution by John Lenton is wrong, too.
>
> The solution by Brian Beck delivers the correct result for most
input,
> but for some input lists like
> [[3, 3], [8, 7], [3, 2], [8, 5], [5, 6], [6, 3], [10, 8], [8, 10],
[4,
> 10], [10, 2]]
> it chokes and returns the empty list.
>
> My solution (which may not be the fastest or most effective, but till
> now is the shortest <wink> and it works):
>
> def merge(pairings):
>     sets = {}
>     for x1, x2 in pairings:
>         newset = (sets.get(x1, frozenset([x1]))
>                   | sets.get(x2, frozenset([x2])))
>         for i in newset:
>             sets[i] = newset
>
>     return [list(aset) for aset in set(sets.itervalues())]
>
>
> Reinhold

FWIW, here's a brief UAT report:

Appears to work: Reinhold, David, Xah (v2)
Has bug(s): John L (v*), Brian (v*)
Incomprehensible: Xah (v*)

'Come back after lunch' award goes to Xah v2, which at a glance appears
to be O(N**4) -- dictionary.update() inside 3-deep nest of 'for'
statements.

Here's a small input that busts all non-working versions:

input: [[1, 2], [3, 4], [2, 3], [4, 5]]
merge_RB  -> [[1, 2, 3, 4, 5]]
merge_DE  -> [[1, 2, 3, 4, 5]]
merge_JL  -> [[1, 2, 3, 4], [5]]
merge_JL2 -> [[1, 2, 3, 4], [5]]
merge_BB  -> []
merge_XL  -> [[1, 2, 3, 4, 5], [3, 4, 5]]
merge_XL2 -> [[1, 2, 3, 4, 5]]



From grante at visi.com  Thu Feb 17 16:12:56 2005
From: grante at visi.com (Grant Edwards)
Date: 17 Feb 2005 21:12:56 GMT
Subject: How to wrap a class's methods?
References: <4214f167$0$44618$a1866201@visi.com>
	<lcSdnQIG9cWZZ4nfRVn-vw@comcast.com>
	<4214fd15$0$44645$a1866201@visi.com>
	<mailman.2778.1108674428.22381.python-list@python.org>
Message-ID: <421508d8$0$44608$a1866201@visi.com>

On 2005-02-17, Michael Spencer <mahs at telcopartners.com> wrote:

>> Thanks.  The stuff provided by the "new" module is what I was
>> missing.
>
> No magic in the 'new' module - new.instancemethod is just a synonym for the 
> method type:
>
>  >>> import new, types
>  >>> new.instancemethod is types.MethodType
> True

Thanks -- I didn't know that either.

-- 
Grant Edwards                   grante             Yow!  I joined scientology
                                  at               at a garage sale!!
                               visi.com            


From jerf at jerf.org  Tue Feb  1 13:12:02 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 01 Feb 2005 13:12:02 -0500
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<uImdnUAKxbKaFWPcRVn-2A@telcove.net>
	<1107205410.367521.50490@f14g2000cwb.googlegroups.com>
	<44SdnUZGopnrAWLcRVn-pg@telcove.net>
Message-ID: <pan.2005.02.01.18.12.01.940348@jerf.org>

On Tue, 01 Feb 2005 09:13:36 -0600, Thomas Bartkus wrote:
> *Is* there a reason why the interpreter couldn't/shouldn't require formal
> variable declaration?

You mean, other than the reasons already discussed at length in this
thread, not to mention many many others?

Your not *liking* the reasons doesn't make them any less the reasons. They
may not even be good reasons, nevertheless, there the reasons are.

If you're literally asking the question you are asking, re-read this
thread more carefully. If you're *really* asking "Give me a reason *I
like*", I suggest re-reading Alex's discussion on why maybe Python isn't
for everybody.

All I know is that I have created large programs and typos like you seem
mortally terrified of occur on average about once every *ten modules* or
so, and are generally caught even before I write the unit tests. Breaking
the language to avoid what *by construction* is demonstrated not be a real
problem is... well, I believe Alex covered that, too.

Blah blah blah, "what if... what if... what if..." We should concentrate
on *real* problems, ones that exist in real code, not ones that mostly
exist in wild-eyed prose that consists of predictions of pain and death
that conspicuously fail to occur, no matter how many times they are
repeated or we are exhorted to heed them or face our doom. 

(The previous paragraph also describes my root problem with Java's strong
typing philosophy; death, doom, and destruction conspicuously fail to
occur in Python programs, so why the hell should I listen to the
doomsayers after I've already proved them false by extensive personal
experience? No amount of prose is going to convince me otherwise, nor
quite a lot of the rest of us.)


From just at xs4all.nl  Thu Feb 24 04:11:14 2005
From: just at xs4all.nl (Just)
Date: Thu, 24 Feb 2005 10:11:14 +0100
Subject: Style guide for subclassing built-in types?
References: <ba1e306f.0502221846.70cb4d5c@posting.google.com>
	<1109127834.660822.247120@g14g2000cwa.googlegroups.com>
	<1109150091.356411.150460@l41g2000cwc.googlegroups.com>
	<1109151417.903188.73790@f14g2000cwb.googlegroups.com>
	<421c76cd$1_1@newspeer2.tds.net>
	<1109163706.118457.53720@z14g2000cwz.googlegroups.com>
	<mailman.2977.1109182909.22381.python-list@python.org>
	<1109208924.563510.212500@f14g2000cwb.googlegroups.com>
Message-ID: <just-0BCA75.10111424022005@news1.news.xs4all.nl>

In article <1109208924.563510.212500 at f14g2000cwb.googlegroups.com>,
 janeaustine50 at hotmail.com wrote:

> Thank you but your advice doesn't fit in my case since I want to keep
> the memory usage and the initial time minimum. iterable[::-1] would
> build another list and it would take big memory and time during
> reversing if iterable were huge. (and the "iterable" wouldn't be
> garbage-collected because I want to keep a reference to it)

If your list contains numbers (or lists of numbers), consider using 
NumPy (Numeric) or Numarray, in which seq[::-1] will actually return a 
"view", and not a copy.

Just


From sh_snyder at yahoo.com  Sat Feb 19 22:10:31 2005
From: sh_snyder at yahoo.com (scott)
Date: 19 Feb 2005 19:10:31 -0800
Subject: Matplotlib, py2exe and pytz
In-Reply-To: <mailman.2847.1108866174.22381.python-list@python.org>
References: <1108776896.490620.249130@f14g2000cwb.googlegroups.com>
	<mailman.2847.1108866174.22381.python-list@python.org>
Message-ID: <1108869031.068167.49840@l41g2000cwc.googlegroups.com>

I unzipped library.zip to see what compiled python files were included
in the zip.
As in the error stacktrace the Pytz.timezone package was not part of
the library.
After manually adding it and rezipping the library I ran into another
missing module, this time it was missing backend_agg

Traceback (most recent call last):
  File "gcToCsv.py", line 5, in ?
  File "plot_output.pyc", line 1, in ?
  File "pylab.pyc", line 1, in ?
  File "matplotlib\pylab.pyc", line 195, in ?
  File "matplotlib\backends\__init__.pyc", line 20, in ?
ImportError: No module named backend_agg

I added that module and then saw that it was missing pyparsing
Traceback (most recent call last):
  File "gcToCsv.py", line 5, in ?
  File "plot_output.pyc", line 1, in ?
  File "pylab.pyc", line 1, in ?
  File "matplotlib\pylab.pyc", line 195, in ?
  File "C:\PYTHON23\Lib\site-packages\matplotlib\backends\__init__.py",
line 20,
 in ?
    globals(),locals(),[backend_name])
  File
"C:\PYTHON23\Lib\site-packages\matplotlib\backends\backend_agg.py",
line
85, in ?
    from matplotlib.mathtext import math_parse_s_ft2font
  File "C:\PYTHON23\Lib\site-packages\matplotlib\mathtext.py", line
140, in ?
    from matplotlib.pyparsing import Literal, Word, OneOrMore,
ZeroOrMore, \
ImportError: No module named pyparsing

After that I stopped adding modules as I figured the problem was more
involved than just missing 1 or 2 modules.

My app just takes a set of data and plots it using the library. It does
not use matplotlib date functionality explicitly, it converts a list of
datatimes to a list of elapsed times (numbers of seconds) and plots
data against these floats.

The setup.py file I used was the one in the matplotlib documentation. I
then added the opt line to try and force the inclusion of that package.


I am relatively new to Python programming coming most recently from a
Java programming background, and was wondering why python does not have
the concept of a python archive much like a "jar" file in Java.
That would make all of these problems fairly trivial, inclusion of
dependant libraries would just be a matter of having the appropriate
"Python ARchive in a directory in the PYTHON_PATH so that it could be
loaded.

Thanks for any help on resolving my py2exe problems.

Scott Snyder



From adam at cognitcorp.com  Sun Feb  6 23:15:14 2005
From: adam at cognitcorp.com (Adam DePrince)
Date: Sun, 06 Feb 2005 23:15:14 -0500
Subject: bytecode obfuscation
In-Reply-To: <4206195e$0$24724$626a14ce@news.free.fr>
References: <mailman.1837.1107465982.22381.python-list@python.org>
	<ctu72f$fs3$1@nemesis.news.tpi.pl>
	<mailman.2014.1107676937.22381.python-list@python.org>
	<4206195e$0$24724$626a14ce@news.free.fr>
Message-ID: <1107749714.3850.41.camel@localhost.localdomain>

On Sun, 2005-02-06 at 08:19, Philippe Fremy wrote:
> Adam DePrince wrote:
> > No amount of obfuscation is going to help you.
> 
> Theorically, that's true. Anything obfuscated can be broken, just like 
> the non obfuscated version. However it takes more skills and time to 
> break it. And that's the point. By raising the barrier for breaking a 
> product, you just eliminate a lot of potential crackers.
> 
> > The worst case if you depend on obscurity:  The bad guys are rounding
> > off your pennies as you read this.
> 
> That's the worst case, we all know that. A good case is to rely on open 
> spec and standard. However, obscurity can help if added on top of that.
> 
> I remember an article of Fyodor explaining that if you run your internal 
> apache server on port 1234 (for an enterprise) with all the normal 
> security turned on, you avoid 80% of the common cracker. You should not 
> rely on the port number for security but changing it improves it.

Okay, so only 20% of the script kiddies are filling the edges of your
coins.   

It would seem that the article you quote is addressing the computer
equivalent of a burglar.  There is nothing personal between a burglar
and a home owner (from the formers perspective at least.)  Any home will
do, and their victim is chosen from a large pool of equally
uninteresting targets on the basis of their vulnerability.   Those 80%
don't notice your port 1234 because it serves no purpose.  They aren't
looking to break into you specifically, they are looking to break in
anywhere, and the act of changing your port, much like attaching a chain
to your wallet, makes you not worth the effort.

There are two problems with your analogy.   First, you are forgetting
the economics of the situation.  The low value of cracking yet another
web server over shadows only the minuscule cost of port scanning the
potential mark.

The second problem with your analogy lies in the very nature of the
problem you are trying to solve.  Decompiling and securing your website
are two different beasts, so much that it is not possible to draw
conclusions about one from experiences with the other.  The former is
simply a matter of reading the code and emulating your cpu/virtual
machine/etc by hand with a paper and pencil.  Time consuming and
tedious, but quite certain in its outcome.

The barrier to decompiling this code has to be raised above the benefit
you will get from decompiling it.  If the server that this code to works
correctly and depends on no magic within the client to protect itself
from rounded pennies, then you are fine even if the code is reverse
engineered, for the problem becomes one of the correctness of the
implementation of the server code in the face of a hostile client. 
Doing this will foil your hacker by eliminating the benefit of reverse
engineering.  

If the server is not robust, then the payoff becomes all of your rounded
pennies.  Even by the decedent wage standards of American programmers,
the payoff greatly exceeds the labor cost of learning how your API works
from the byte code.   Remember, anything a computer can understand is a
language that a human can learn too (there is a reason why computer
science also goes by the name computational linguistics.)  Obfuscate
your code to the end of the world and all you have done is changed the
language in which the programmer will learn your algorithm.  

Big deal, instead of turning it into python, I print up the symbolic
representation of the python byte code, assembly, vhdl or whatever it
might be.   Low level languages are not that hard to read.  Remember, if
it can run on a computer, it can run on pencil and paper.   Just look at
the trouble DRM has ... they have to go so far as to introduce "trusted
hardware", aka a machine that won't let you dump the machine code to
your printer.


Adam DePrince 




From marian at mba-software.de  Thu Feb  3 13:46:50 2005
From: marian at mba-software.de (=?ISO-8859-1?Q?Marian_Aldenh=F6vel?=)
Date: Thu, 03 Feb 2005 19:46:50 +0100
Subject: Printing Filenames with non-Ascii-Characters
In-Reply-To: <ctrco7$uvs$1@news2.tilbu1.nb.home.nl>
References: <36a3ikF4uk8r0U1@individual.net>
	<ctos5r$t3b$1@news2.tilbu1.nb.home.nl>
	<36bka5F4vp17cU1@individual.net>
	<ctrco7$uvs$1@news2.tilbu1.nb.home.nl>
Message-ID: <36f9sqF505hq0U1@individual.net>

Hi,

 > Python's drive towards uncompromising explicitness pays off
> big time when you're dealing with multilingual data.

Except for the very implicit choice of 'ascii' as an encoding when
it cannot make a good guess of course :-).

All in all I agree, however.

Ciao, MM
-- 
Marian Aldenh?vel, Rosenhain 23, 53123 Bonn. +49 228 624013.
http://www.marian-aldenhoevel.de
"There is a procedure to follow in these cases, and if followed it can
  pretty well guarantee a generous measure of success, success here
  defined as survival with major extremities remaining attached."


From beefens_skasuj_ at o2.pl  Wed Feb  2 08:20:26 2005
From: beefens_skasuj_ at o2.pl (Pawel Chrobak)
Date: Wed, 2 Feb 2005 14:20:26 +0100
Subject: access to serial port
References: <ctqh3j$nj$1@news.onet.pl>
	<mailman.1754.1107349569.22381.python-list@python.org>
Message-ID: <ctqk2o$6eq$1@news.onet.pl>


> Keywords: python serial
>

Great, I needed exactly this information ( pyserial) . Thanks a lot ;)




From steven.bethard at gmail.com  Tue Feb 15 17:04:07 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 15 Feb 2005 15:04:07 -0700
Subject: Calling a function from module question.
In-Reply-To: <o2uQd.32681$6u.27667@fed1read02>
References: <UTsQd.32669$6u.27954@fed1read02>
	<42125d6d$0$28977$e4fe514c@news.xs4all.nl>
	<3LtQd.32674$6u.18210@fed1read02>
	<c5SdndbH1vSS9o_fRVn-sQ@comcast.com>
	<o2uQd.32681$6u.27667@fed1read02>
Message-ID: <3LOdncDRa6BK7I_fRVn-rA@comcast.com>

Sean wrote:
>>>>from module_name import print_this
>>>
>>>>or, even:
>>>>
>>>
>>>>from module_name import print_this as other_nice_name
>>>
>>>So what if I have a whole bunch of functions - say 25 of them.
>>>Is there a way to do this without naming each function?
>>
>>Yes [1], but it's basically deprecated and you shouldn't use it. Consider 
>>refactoring your code.
> 
> Refactoring my code?  Sorry, I am not sure what you mean here.
> 
> How would one refactor the example in my original post? 

The original post only had one name to import, not 25, so refactoring 
isn't really necessary. ;)  What are the 25 functions you want to 
import?  Perhaps you can group them together in classes?  Or maybe a 
couple of (sub-)modules is the way to go...

STeVe


From just at xs4all.nl  Thu Feb  3 06:50:09 2005
From: just at xs4all.nl (Just)
Date: Thu, 03 Feb 2005 12:50:09 +0100
Subject: Easy Q: dealing with object type
References: <420181b1$1@nntp.zianet.com>
	<1107396669.028096.301290@g14g2000cwa.googlegroups.com>
	<42019545$1@nntp.zianet.com> <SJmdnddykYoAOpzfRVn-hA@comcast.com>
Message-ID: <just-A7B5B3.12500903022005@news1.news.xs4all.nl>

In article <SJmdnddykYoAOpzfRVn-hA at comcast.com>,
 Steven Bethard <steven.bethard at gmail.com> wrote:

> Erik Johnson wrote:
> > "Erick" <idadesub at gmail.com> wrote in message
> > news:1107396669.028096.301290 at g14g2000cwa.googlegroups.com...
> > 
> >>Ah, you're running into the "old-style classes vs. new style classes".
> >>Try subclassing from "object".
> >>
> >>For example:
> >>
> >>>>>class A(object):
> > 
> > That works! :) I guess I am fortunate to be running 2.2 - looks kinda ugly
> > prior to that.
> 
> It's not horrible:
> 
> py> class A:
> ...     pass
> ...
> py> class B:
> ...     pass
> ...
> py> a = A()
> py> a.__class__ == A
> True
> py> a.__class__ == B
> False

Uh, isinstance(a, A) works for both new-style and old-style classes. 
Heck, isinstance() even works in Python 1.5.2...

> Still, if you can use new-style classes, you should.
> 
> Also, you should probably Google for "duck typing".  Generally, in 
> Python it is frowned upon to check the type of an object.  There are 
> times when it's necessary, but if you're just starting off, my guess is 
> that you haven't discovered one of these times yet...

Just


From peter at engcorp.com  Sun Feb 27 12:42:19 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sun, 27 Feb 2005 12:42:19 -0500
Subject: TKinter
In-Reply-To: <38eb4lF5nldh7U1@individual.net>
References: <38eb4lF5nldh7U1@individual.net>
Message-ID: <OqadnbrLhafnm7_fRVn-oA@powergate.ca>

anthonyberet wrote:
> So, is it pronounced 'Tee-Kinter', or 'Tee-Kay-Inter'?
> I don't want to appear as a dork down the pub.

Both, in my experience.

And then there's wxPython, which is pronounced variously
as "wiks-python", "double-you-eks-python", or even in some
strange way that I'll leave it to Mike Fletcher to describe
since it embarrasses me even to mention it. ;-)

-Peter


From ruach at chpc.utah.edu  Fri Feb 11 13:27:52 2005
From: ruach at chpc.utah.edu (Matthew Thorley)
Date: Fri, 11 Feb 2005 11:27:52 -0700
Subject: problem with tk and pass by refference (I think :)
Message-ID: <cuitgv$r4i$1@vegh.ks.cc.utah.edu>

Greetings, Maybe someone out there can lend me an eye? I've been 
stumped, banging my head against the wall trying to figure out why my 
script doesn't work. I've tried every thing I could think of, even 
unecessarily complicated mumbo-jumbo. Let me show you a snippet and then 
I'll explain what's happening.


for verse in self.activeSong['verses']:
             verseNum = self.activeSong['verses'].index(verse)
             activeSong = self.activeSong.copy()
             firstLine = split(verse, '\n')[0]
             button = Button(self.songWin, text=verse, command=(lambda: 
self.showVerse(verseNum)) )
             button.config(bg='grey')
             button.pack(expand=YES, fill=BOTH, side=TOP)
             self.verseButtons.append(button)


This is as simple app for displaying the words of a song with an 
overhead projector. When you click on a song the program reads it and 
creates a button for each verse. When you click the button it is 
supposed to display that verse. As you can see above I am trying to call 
the showVerse method and pass it the verseNum.

The problem I am having is that every button gets assigned the verseNum 
for the last verse that gets processed. That is to say, if a sone has 4 
verses every button shows verse for, a 6 verse song loads verse 6 for 
every button, etc. I think that the value is getting passed by 
reference, so it gets updated with every iteration. I have seriously 
tried every thing I can think of to fix this.

If any one has any thoughts I would really appreciate it.
Thanks very much!
-Matthew


From news at NOwillmcguganSPAM.com  Thu Feb 17 12:13:11 2005
From: news at NOwillmcguganSPAM.com (Will McGugan)
Date: Thu, 17 Feb 2005 17:13:11 +0000
Subject: Creating properties with decorator like syntax
In-Reply-To: <4214d006$0$8747$db0fefd9@news.zen.co.uk>
References: <4214d006$0$8747$db0fefd9@news.zen.co.uk>
Message-ID: <4214d0a7$0$8747$db0fefd9@news.zen.co.uk>

Will McGugan wrote:
> Hi,
> 
> Is there any way of making properties using a decorator? The current way 
> of creating a property seems inelegant.
> 
> Something like this imaginary snippit would be nice, IMHO.
> 
> class C(object):
>     @make_property
>     def x(self):
>         def getx(self): return self.__x
>         def setx(self, value): self.__x = value
>         def delx(self): del self.__x
> 

Posted too soon. Played with the above and got something which works.


def make_property( func ):
     return property( *func() )

class C(object):

     def __init__(self):
         __x= 1

     @make_property
     def x():
         def getx(self): return self.__x
         def setx(self, value): self.__x = value
         def delx(self): del self.__x
         return getx,setx,delx

c= C()
c.x= 5
n= c.x + 5

Good idea, or bad?

Will McGugan


From devnull at kma.eu.org  Tue Feb  1 02:55:02 2005
From: devnull at kma.eu.org (Grumble)
Date: Tue, 01 Feb 2005 08:55:02 +0100
Subject: what's OOP's jargons and complexities?
In-Reply-To: <873bwjj8fe.fsf@thalassa.informatimago.com>
References: <1106953849.915440.134710@f14g2000cwb.googlegroups.com>
	<1107060381.623163.19850@z14g2000cwz.googlegroups.com>
	<873bwjj8fe.fsf@thalassa.informatimago.com>
Message-ID: <ctnckn$462$1@news-rocq.inria.fr>

Pascal Bourguignon wrote:

> You forgot to mention the coordinates of your secret mountain compound:
> 
>                    28 deg 5 min N, 86 deg 58 min E

Mount Everest?


From aurora00 at gmail.com  Fri Feb  4 15:28:02 2005
From: aurora00 at gmail.com (aurora)
Date: Fri, 04 Feb 2005 12:28:02 -0800
Subject: executing VBScript from Python and vice versa
References: <mailman.1915.1107548562.22381.python-list@python.org>
Message-ID: <opslowg0nb6yt6e7@news.cisco.com>

Go to the bookstore and get a copy of Python Programming on Win32
by Mark Hammond, Andy Robinson today.

   http://www.oreilly.com/catalog/pythonwin32/

It has everything you need.

> Is there a way to make programs written in these two languages  
> communicate
> with each other? I am pretty sure that VBScript can access a Python  
> script
> because Python is COM compliant. On the other hand, Python might be able  
> to
> call a VBScript through WSH. Can somebody provide a simple example? I  
> have
> exactly 4 days of experience in Python (and fortunately, much more in  
> VB6)
>
> Thanks.
>



From ncoghlan at iinet.net.au  Thu Feb 10 08:37:58 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Thu, 10 Feb 2005 23:37:58 +1000
Subject: Testing conditions.
In-Reply-To: <cues7q$mg7$1@news7.svr.pol.co.uk>
References: <cues7q$mg7$1@news7.svr.pol.co.uk>
Message-ID: <420B63B6.1040006@iinet.net.au>

Ray Gibbon wrote:
> Before I resign myself to the inevitable, 'that's the way it is - get used
> to it', I'd just like to scratch it once.  But, before I try walking on very
> thin ice, I want to ask whether there are expectations of some future
> changes which address these issues?
> 
> I note PEP 3000 is silent on this matter, and PEP 315, though related, is
> not relevant.

The nicest idea I've seen along these lines is:

   if <expr> as <name>:
     pass
   elif <expr> as <name>:
     pass
   else:
     pass

and

   while <expr> as <name>:
     pass

It's based on the idea of using 'as' to name caught exceptions in Python 3k 
(which is in turn based on the use of as for renaming in import statements)

However, like allowing assignment, this approach breaks down as soon the thing 
you want bound and the condition you want to test aren't the same, and then you 
have to switch back to the 'bind before test' approach.

Which means a general solution has to allow *three* parts, not two:

1. A conditional expression

And optionally:
2. A subexpression to be named
3. The name for the subexpression

That is, something like:

   if <expr> using <expr> as <name>:
     pass
   elif <expr> using <expr> as <name>:
     pass
   else:
     pass

and

   while <expr> using <expr> as <name>:
     pass

(In the degenerate case where the condition is the thing we want named, it may 
be possible to make the 'using' clause optional. If not, then the first 
expression is simply <name>)

But such a solution involves an entirely new keyword and there's the eternal 
question of whether the feature is needed *enough* to justify complicating the 
syntax. The while case isn't good justification, since such while loops can 
usually be converted to a generator function and a pair of for loops easily 
enough. if/elif is slightly more promising as a motivation - having to convert 
to nested if statements if you discover you need access to some part of the 
condition test is a pain and the nested if's are harder to read that if/elif. 
How common is that situation in reality, though? I can't think of a case where 
I've had to use more than one nested if statement due to the 'problem' of not 
being to do an embedded assignment.

*shrug* The issue has never really bothered me in practice. Heck, I often don't 
use nested assignment even in C, since the buggers can be so damn hard to read. 
That's mainly due to the = vs == problem though :)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From ilias at lazaridis.com  Wed Feb 23 10:01:21 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Wed, 23 Feb 2005 17:01:21 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <421c91c8$0$44647$a1866201@visi.com>
References: <cuo71l$gig$1@usenet.otenet.gr> <cvaoft$av6$1@usenet.otenet.gr>
	<874qg6937w.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<cvcv9b$nbm$1@usenet.otenet.gr> <37uk2kF5gv38bU1@individual.net>
	<nmSSd.25321$Am3.782245@news20.bellglobal.com>
	<cvi2c5$ibu$1@usenet.otenet.gr>
	<421c91c8$0$44647$a1866201@visi.com>
Message-ID: <cvi5s1$4l5$1@usenet.otenet.gr>

Grant Edwards wrote:
[...]
> Um, you realize that nobody in this thread takes you the least
> bit seriously and people are just poking you with a stick to
> watch you jump?

jump:

[EVALUATION] - E02 - Support for MinGW Open Source Compiler
Essence:
http://groups-beta.google.com/group/comp.lang.python/msg/5ba2a0ba55d4c102

.

-- 
http://lazaridis.com


From jamesthiele.usenet at gmail.com  Sun Feb  6 14:28:37 2005
From: jamesthiele.usenet at gmail.com (jamesthiele.usenet at gmail.com)
Date: 6 Feb 2005 11:28:37 -0800
Subject: loops -> list/generator comprehensions
Message-ID: <1107718117.221204.80410@l41g2000cwc.googlegroups.com>

I wrote this little piece of code to get a list of relative paths of
all files in or below the current directory (*NIX):

    walkList  = [(x[0], x[2]) for x in os.walk(".")]
    filenames = []
    for dir, files in walkList:
        filenames.extend(["/".join([dir, f]) for f in files])

It works fine, I don't need to change it, but I know there is a one
liner list/generator comprehension to do this - I'm just not well
enough versed in comprehensions to figure it out. Can someone please
show me what it is?

Even better, is there a generalized way to transform simple loops into
comprehensions that someone can point me to?

james



From Enoch at theFort.org  Fri Feb 11 12:52:44 2005
From: Enoch at theFort.org (Enoch)
Date: Fri, 11 Feb 2005 17:52:44 +0000
Subject: [N00B] What's %?
In-Reply-To: <614c778e.0502100938.6665cb52@posting.google.com>
References: <614c778e.0502100938.6665cb52@posting.google.com>
Message-ID: <a7idncEBIfbxApbfRVnytQ@giganews.com>

administrata wrote:
> Hi! it's been about a week learning python!
> I've read 'python programming for the absolute begginer'
> I don't understand about % like...
> 
> 107 % 4 = 3
> 7 % 3 = 1
> 
> I'm confused with division :/
> Please help me...
> 
> thx 4 reading.

% means modulus, which is simply, the remainder of A divided by B
so:

7 % 3 = 1

because only two threes go into seven, leaving 1 remainder. Modulus only 
returns that remainder.

And 107 % 4 = 3 because 26 4's go into 107 leaving 3 over.

Make sense?

Enoch.


From lars-www at lycos.com  Sun Feb 13 12:28:59 2005
From: lars-www at lycos.com (Lars)
Date: 13 Feb 2005 09:28:59 -0800
Subject: Alternative to raw_input ?
References: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>
	<w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>
	<cuio9f$13k8$1@ns.felk.cvut.cz>
	<mailman.2486.1108315169.22381.python-list@python.org>
Message-ID: <1108315739.704768.134290@c13g2000cwb.googlegroups.com>

Then may I suggest the keeping-it-simple approach:

def myGetch():
....raw_input("Press Enter to continue")


(sorry about the dots, I'm using google groups)

Lars



From dave at pythonapocrypha.com  Sun Feb 13 22:35:29 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Sun, 13 Feb 2005 20:35:29 -0700
Subject: For American numbers
In-Reply-To: <ZcKdnWy9_fFamI3fRVn-iA@powergate.ca>
References: <420e7376$1@nntp0.pdx.net>
	<gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>	<420fb4e6$0$16575$9b622d9e@news.freenet.de>
	<ZcKdnWy9_fFamI3fRVn-iA@powergate.ca>
Message-ID: <42101C81.7070109@pythonapocrypha.com>

Peter Hansen wrote:
> Martin v. L?wis wrote:
> 
>> Peter Hansen wrote:
>>
>>> For the rest of the computer world, unless I've missed
>>> a changing of the guard or something, "kilo" is 1024
>>> and "mega" is 1024*1024 and so forth...
>>
>> In case this isn't clear yet: you have missed a changing
>> of the guard or something. "kibi" is 1024, "mebi" is
>> 1024*1024 and so forth. "kilo" is 1000.
> 
> Yeah, saw the link.  The IEC doesn't speak for me, I'm afraid.
> And as the wikipedia notes, "As of 2005 this naming convention
> has not gained widespread use."
> 
> I suspect I and many others will go to our graves not being
> comfortable mebbling and gibbling over our bytes, though
> we'll probably spend a lot of time kibbling over the issue...

Indeed - it's a little early to say that we've missed a changing of the guard! :)

Multiple definitions aside, "kilo" and "mega" are far too entrenched - even if I 
could manage to say "kibibyte" with a straight face, I'd get nothing but blank 
stares in return.

-Dave


From mwm at mired.org  Mon Feb  7 21:45:57 2005
From: mwm at mired.org (Mike Meyer)
Date: Mon, 07 Feb 2005 20:45:57 -0600
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<s5RNd.104904$Jk5.38565@lakeread01>
	<1107815270.149109.80420@c13g2000cwb.googlegroups.com>
Message-ID: <86ekfr93bu.fsf@guru.mired.org>

"Kartic" <kartic.krishnamurthy at gmail.com> writes:

> Is there a "GPL for Dummies" out there??? :-)
>
> Sorry if I am asking a question that has already been asked/answered in
> another form.
>
> In any case, let's say I use Python to create an application that uses
> some module that is GPL. So what are my options?
> 1. Distribute my app as closed source but with source, available upon
> request and clearly stated so in my license, for the GPL'ed module. But
> the code to my app only is not available as it is closed source.

You can't do this one. At least, that's the stand that the FSF is
taking.

I wonder about distributing an installation tool that grabs the GPL'ed
module from it's "standard" location and just installing it? That way,
you're not distributing any GPL'ed code, so your code can be
distributed however you want. It would seem that that would have to be
legal, otherwise apt-get and CPAN would be legally problematical.

       <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From philippe at philippecmartin.com  Mon Feb  7 12:48:10 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Mon, 07 Feb 2005 17:48:10 GMT
Subject: socket question
References: <mailman.2089.1107796309.22381.python-list@python.org>
	<36pm9uF53qlqdU1@individual.net>
Message-ID: <pan.2005.02.07.17.48.10.131474@philippecmartin.com>

Thanks you! that did it.

PS: the 'wrong' info I got seems to be in the official howtos
http://www.amk.ca/python/howto/sockets/

Regards,

Philippe





On Mon, 07 Feb 2005 18:23:28 +0100, Diez B. Roggisch wrote:

>> A couple things to notice: we used socket.gethostname() so that the
>> socket would be visible to the outside world. If we had used s.bind(('',
>> 80)) or s.bind(('localhost', 80)) or s.bind(('127.0.0.1', 80)) we would
>> still have a "server" socket, but one that was only visible within the
>> same machine.
> 
> This is wrong. There is a difference between passing '' and 'localhost'. The
> latter  binds the socket only to the ip 127.0.0.1, where '' binds it to all
> available ips.
> 
>> My problem is that I cannot connect to my server if the client is not on
>> the same PC (although I'm doing the above).
>> Also:
>> 1) my server has more than one IP addresses
>> 2) my server does not have any DNS name
>> ... so I want to connect to an IP address that I can ping but has no
>> name.
>> How can I do that ?
> 
> Pass the ip as hostname (as string like "192.168.1.10")



From steve at holdenweb.com  Wed Feb  2 18:39:45 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 02 Feb 2005 18:39:45 -0500
Subject: Generating .pyc/.pyo from a make file
In-Reply-To: <2h48d2-8481.ln1@eskimo.tundraware.com>
References: <4308d2-0801.ln1@eskimo.tundraware.com>
	<42015a85_1@news.arcor-ip.de>
	<dh38d2-at71.ln1@eskimo.tundraware.com>
	<4201607f_2@news.arcor-ip.de> <RldMd.102645$Jk5.24461@lakeread01>
	<2h48d2-8481.ln1@eskimo.tundraware.com>
Message-ID: <dCdMd.102651$Jk5.97114@lakeread01>

Tim Daneliuk wrote:

> Steve Holden wrote:
> 
>> Roland Heiber wrote:
>>
>>> Tim Daneliuk wrote:
>>>
>>>> It does - thanks.  One more question:  Are pyc and pyo file portable
>>>> across operating systems?  I suspect not since I generated a pyo
>>>> on a FreeBSD machine that will not run on a Win32 machine.  I was
>>>> under the impression that "compiled" meant optimized byte code that
>>>> was portable across implementations, but it looks to not be the case...
>>>>
>>>
>>> Hi,
>>>
>>> ..pyc's should be, cause it's standard python-bytecode, if you use 
>>> massive optimizations it depends not on the os but on the underlying 
>>> cpu/architecture ...
>>>
>>> So long, Roland
>>
>>
>>
>> You probably tried to use a bytecode file from *one* version of Python 
>> with an interpreter of another version. Python actually checks the 
>> first four bytes of the .pyc file for a compatible "magic number" 
>> before accepting the file for execution.
>>
>> regards
>>  Steve
> 
> 
> Aha!  Exactly ... and that makes perfect sense too.  D'oh!  I guess a 
> better
> distribution strategy would be to have the installation program generate 
> the pyo
> file at installation time...
> 
> Thanks -
> 
That's what most sensible distributions do.

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From keith.veleba at gmail.com  Wed Feb  9 11:01:15 2005
From: keith.veleba at gmail.com (Keith Veleba)
Date: 9 Feb 2005 08:01:15 -0800
Subject: Synchronizing methods of a class
References: <1107806222.385926.235060@o13g2000cwo.googlegroups.com>
	<mailman.2191.1107874960.22381.python-list@python.org>
Message-ID: <1107962099.030652.73660@g14g2000cwa.googlegroups.com>

Chris,

Q&D example of <<class>>.__dict__.items() not working for me:

>>> import threading
>>> class A(threading.Thread):
...     def __init__(self):
...             threading.Thread.__init__(self)
...     def one(self):
...             pass
...     def two(self):
...             pass
...
>>> a = A()
>>> a.__dict__.items()
[('_Thread__block',
<Condition(<thread.lock object at 0x009BE070>, 0)>),
('_Thread__name', 'Thread-1'),
('_Thread__daemonic', False),
('_Thread__started', False),
('_Thread__target', None),
('_Thread__kwargs', {}),
('_Verbose__verbose', False),
('_Thread__args', ()),
('_Thread__stopped', False),
('_Thread__initialized', True)]

Neither function I added to the A class shows up.

However, I think it's because I'm using an instance of my class vs.
just referencing the class type.

If I type:

A.__dict__items()

I get the correct list:

[('__module__', '__main__'),
('__doc__', None),
('two', <function two at 0x009E21B0>),
('__init__', <function __init__ at 0x009E2170>),
('one', <function one at 0x009E2230>)]

In any case, thanks for the example reference.  That's helps me improve
my idea, and I will most likely use the methods in it.

Keith



From tchur at optushome.com.au  Tue Feb  8 08:41:41 2005
From: tchur at optushome.com.au (Tim Churches)
Date: Wed, 09 Feb 2005 00:41:41 +1100
Subject: Big development in the GUI realm
In-Reply-To: <cu9v2s$5eq$1@sea.gmane.org>
References: <200502072347.j17NlPnh012281@mail07.syd.optusnet.com.au>
	<cu9v2s$5eq$1@sea.gmane.org>
Message-ID: <4208C195.1000104@optushome.com.au>

Fredrik Lundh wrote:

>Tim Churches wrote:
>
>  
>
>>>and how exactly are you going to load a DLL from an EXE file with-
>>>out "mixing, including, or combining" the two?
>>>      
>>>
>>You can't, but as long as that "mixing, including, or combining" only occurs at runtime,
>>the GPL itself specifically says that is out of scope and the GPL does not apply. Their
>>words, not mine - to quote (yet again):
>>
>>"Activities other than copying, distribution and modification are not covered by this
>>License; they are outside its scope. The act of running the Program is not restricted,..."
>>    
>>
>
>except that if *you* set things up so the code is combined when run, *you* are
>copying, distributing, and/or modifying the program in order to mix, include and/or
>combine your work with the GPL:ed work.
>
>if you leave all that to the user, you're clear.
>  
>
Yes, that is what I, and others, have been saying, and doing, all along. 
Our Mozilla Public Licensed Python application imports (but contains no 
code from) a GPLed third-party Python module at runtime, but we don't 
distribute that module, we just tell users to obtain it independently 
and install it on their systems.

>(relying on word games is a lousy legal strategy in most parts of the world)
>  
>
(Gee, I thought that word games were the entire basis of much legal 
endeavour in most parts of the world. Patent specifications in 
particular spring to mind.)

Less flippantly, I agree, and I find it Hanlonesque that the FSF 
continues to promote a license which is at best unclear and at worst 
completely contradictory on the issue of whether dynamic, runtime 
linking or calling does or doesn't fall under its scope. Others have 
thought the same - as we have seen, Linus Torvalds felt compelled to 
include an addition to the GPL when licensing the Linux kernel to make 
it crystal clear that making runtime system calls to the kernel did not 
fall under the scope of the kernel license.

I would urge anyone who has published a GPLed Python module to add a 
similar extension in order to clarify their use of the GPL in this regard.

Tim C



From Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org  Sat Feb  5 03:42:10 2005
From: Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org (Alexander)
Date: Sat, 05 Feb 2005 11:42:10 +0300
Subject: variable declaration
References: <1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
Message-ID: <MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>

Hi, Alex!

31 jan 2005 at 13:46, Alex Martelli wrote:

(sorry for the delay,my mail client don't highlight me your answer)

 AM> Since the lack of declarations is such a crucial design choice for
 AM> Python, then, given that you're convinced it's a very bad thing, I
 AM> suggest you give up Python in favor of other languages that give you
 AM> what you crave.
Well, I like Python. But, as every language I know, it have some bad sides
which I don't like. One of them in Python is lack of variable declarations,
another (this problem is common with C/C++) is:
===
>>>print 1/2
0
===
(I understand why it is so, but I don't like it anyway. Such behaviour also can
cause some hard-to-find-bugs)

 AM> issue for you.  Therefore, using Python, for you, would mean you'd be
 AM> fighting the language and detesting its most fundamental design
 AM> choice: and why should you do that?  There are zillions of languages
 AM> -- use another one.
Thank you for advice:)
 >> Pascal, or special syntax in C. It can cause very ugly errors,like
 >> this: epsilon=0 S=0 while epsilon<10:  S=S+epsilon
 >> epselon=epsilon+1 print S It will print zero, and it is not easy to
 >> find such a bug!
 AM> Actually, this while loop never terminates and never prints anything,
Oh, I don't find it:)
 AM> so that's gonna be pretty hard to ignore;-).
 AM> But, assume the code is
 AM> slightly changed so that the loop does terminate.  In that case...:

 AM> It's absolutely trivial to find this bug, if you write even the
 AM> tiniest and most trivial kinds of unit tests.  If you don't even have
 AM> enough unit tests to make it trivial to find this bug, I shudder to
 AM> think at the quality of the programs you code.

Thank you for advice again, I already use different tests in my work and I
found them usefull. But! I want to use Python for prototyping. I want to write
my algorithms on it, just to see they do almost they must to do. Next, I want
to play with them to understand their properties and limitations.
If sometimes such a program fall, or not very fast, or sometimes show wrong
results, it's not a big problem. So, I use Python like tool for prototyping.

After I debug the algorithm and understand it, I can rewrite it on C++ (if I
need), carefully, paying attention to speed, side effects, memory requirements,
and so on. With full testing, of course.



Hence, from "language for prototyping" I need next features:

1. I want to think about algorithm (!!!), and language must help me to do it.
It must take care on boring things like memory management, garbage collection,
strict type inference, my typos. It must provide easy-to-use packages for many
of my low-level needs. And so on.

2. goto 1:)



Python is realy very good for such demands. Except one: it force me to type
variable names carefully:) In other words, divert my attraction from algorithm,
to typing.

 AM> Even just focusing on
 AM> typos,
 AM> think of how many other typos you could have, besides the misspelling
 AM> of 'epsilon', that unit tests would catch trivially AND would be
 AM> caught in no other way whatsoever -- there might be a <= where you
 AM> meant a <, a 1.0 where you meant 10, a - where you meant a +, etc,
 AM> etc.
 AM> You can't live without unit tests.  And once you have unit tests, the
 AM> added value of declarations is tiny, and their cost remains.

Fine! Let interpreter never show us errors like division by zero, syntax
errors, and so on. If file not found, library don't need to say it. Just skip
it!!! Because every, even simple, test will find such bugs. Once you have unit
tests, the added value of <anything> is tiny, and their cost remains.

:)

Or, maybe, we will ask interpreter to find and prevent as many errors as he
can?

And, one more question: do you think code like this:

var S=0
var eps

for eps in xrange(10):
  S=S+ups

is very bad? Please explain your answer:)
 AM> Python has no declarations whatsoever.  If you prefer Visual Basic, I
 AM> strongly suggest you use Visual Basic, rather than pining for Visual
 AM> Basic features in Python.  If and when your programming practices ever
 AM> grow to include extensive unit-testing and other aspects of agile
 AM> programing, THEN you will be best advised to have a second look at
 AM> Python, and in such a case you will probably find Python's strengths,
 AM> including the lack of declarations, quite compelling.

Uh! And you! And you!... And you must never even come close to any languages
with variable declaration! Even to Visual Basic! :)

 AM> brain".  I find it's true: Python gets out of my way and let me solve
 AM> problems much faster, because it fits my brain, rather than changing
 AM> the way I think.

I'm agree with you.

 AM> If Python doesn't fit YOUR brain, for example because your brain is
 AM> ossified around a craving for the declaration of variables, then,
 AM> unless you're specifically studying a new language just for personal
 AM> growth purposes, I think you might well be better off with a language
 AM> that DOES, at least until and unless your brain changes by other
 AM> means.

Thank you for explanation of your opinion.

Alexander, zatv at bk.ru


From jacek.generowicz at cern.ch  Tue Feb  1 04:55:00 2005
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 01 Feb 2005 10:55:00 +0100
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<1107188359.375703.110590@f14g2000cwb.googlegroups.com>
	<1gr9lyc.1rrm543162uefN%aleaxit@yahoo.com>
	<1107229287.315380.222790@c13g2000cwb.googlegroups.com>
Message-ID: <tyfsm4gmwp7.fsf@pcepsft001.cern.ch>

"Michael Tobis" <mt at 3planes.com> writes:

> In fact, I'd recommend a paragraph early in the Nutshell book saying
> "there are no declarations, no use strict, no implicit none, sorry,
> forget it",

It would have to be a pretty long paragraph, if it were to list all
the things that you do NOT find in Python.

> and an index listing under "declarations" pointing to a detailed
> exegesis of their nonexistence.

Think about this. You are either asking that the book's author
anticipate your personal expectations, and write the book to cater for
YOUR PERSONAL expectiations ... or you are asking for a book with an
inifititely long index. The list of things absent from Python is
infinite.

> It would have saved me some time.

You don't want a book, you want a personal tutor.


From gomoSINSPAM at datafull.com  Thu Feb 17 15:07:45 2005
From: gomoSINSPAM at datafull.com (=?iso-8859-1?q?Gonzalo_Sainz-Tr=E1paga_=28GomoX=29?=)
Date: Thu, 17 Feb 2005 17:07:45 -0300
Subject: Local module installation
Message-ID: <pan.2005.02.17.20.07.41.995385@datafull.com>

Hi,

I'm starting to develop a Web application in Python for the first time. I
am considering some modules like SQLObject and Validators (by Ian
Bicking). The problem is, i'm planning to host the site on a shared
hosting provider with mod_python, and therefore I can't install the
modules site-wide.

My question is: How do I install the (distutils-packaged) modules inside
my WWW root in order for them to be found when I try to import them? I
have a config.py script on my WWW root that is imported on every other
script.

As you can see I'm quite a n00b with this (coming from PHP), so any
suggestions would be greatly appreciated.

Thanks in advance,

GomoX


From tjreedy at udel.edu  Tue Feb 15 17:25:17 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 15 Feb 2005 17:25:17 -0500
Subject: Calling a function from module question.
References: <UTsQd.32669$6u.27954@fed1read02>
Message-ID: <cutsnj$1bp$1@sea.gmane.org>


"Sean" <sean at buildingonline.com> wrote in message 
news:UTsQd.32669$6u.27954 at fed1read02...
> import module_name.py

leave off the .py

Irmen answered your main question.

Terry J. Reedy





From http  Fri Feb  4 00:53:31 2005
From: http (Paul Rubin)
Date: 03 Feb 2005 21:53:31 -0800
Subject: advice needed for simple python web app
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
	<7xr7jxnddh.fsf@ruckus.brouhaha.com>
	<OqCdnWO5h9_ynp7fRVn-uA@rogers.com>
Message-ID: <7xis58c1lw.fsf@ruckus.brouhaha.com>

"Dan Perl" <danperl at rogers.com> writes:
> The application is just something I'm playing with to learn a little bit on 
> web apps.  It uses an HTML form to send an email.  The form takes inputs 
> like the From:, To: and Subject: fields and a text field.

Be careful of exposing that script to the internet.  Spammers will
exploit it.


From fredrik at pythonware.com  Tue Feb  8 11:46:18 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 17:46:18 +0100
Subject: Effbot's SimpleXMLWriter fails when py2exe'd
References: <1107880337.524216.180440@g14g2000cwa.googlegroups.com>
Message-ID: <cuaq9j$q6f$1@sea.gmane.org>

Erik Bethke wrote:

> So I have been using Effbot's XML stuff a lot!  And I have been using
> py2exe, pygame and wxPython all mixed together...
>
> I am getting this strange error log when writing XML files with his XML
> writer.  It appears to be fouling up on the encoding, ONLY in the exe
> version.  Runs fine and great as a python script.

you need to explicitly tell py2exe to include the relevant encodings
(from the encodings package in the standard library).  adding a simple

    import encodings.utf_8

to your script might help.  if not, see the following wiki page:

    http://starship.python.net/crew/theller/moin.cgi/EncodingsAgain

</F> 





From MrJean1 at gmail.com  Wed Feb 16 14:52:08 2005
From: MrJean1 at gmail.com (python)
Date: 16 Feb 2005 11:52:08 -0800
Subject: How can I get the source file name and current line number
	inside executed C-function
In-Reply-To: <mailman.2712.1108579083.22381.python-list@python.org>
References: <mailman.2712.1108579083.22381.python-list@python.org>
Message-ID: <1108583528.498025.103450@f14g2000cwb.googlegroups.com>



Below is a function to find the caller's file name, line number, etc.
inside Python.  Maybe this works for your case.

/Jean Brouwers


- import traceback
-
- def caller(up=0):
-     '''Get file name, line number, function name and
-        source text of the caller's caller as 4-tuple:
-        (file, line, func, text).
-
-        The optional argument 'up' allows retrieval of
-        a caller further back up into the call stack.
-
-        Note, the source text may be None and function
-        name may be '?' in the returned result.  In
-        Python 2.3+ the file name may be an absolute
-        path.
-     '''
-     try:  # just get a few frames
-         f = traceback.extract_stack(limit=up+2)
-         if f:
-            return f[0]
-     except:
-         if __debug__:
-            traceback.print_exc()
-         pass
-      # running with psyco?
-     return ('', 0, '', None)
-
-
- if __name__ == '__main__':
-     print caller()



Marek Prerovsky wrote:
> Hello,
>
> I implemented some Python functions in my C/C++ code. I need to know
the Python source file name and line number of just executed
> Python command which calls my function.
> How can I get this information inside my C/C++ function?
> 
> Thanks for any help.
> 
> Marek



From gargonx at gmail.com  Sun Feb 13 14:57:59 2005
From: gargonx at gmail.com (gargonx)
Date: 13 Feb 2005 11:57:59 -0800
Subject: help please
In-Reply-To: <Z4ydnbKMDLVvEJLfRVn-hA@comcast.com>
References: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
	<TPKdnU2eEu9xPJPfRVn-vg@comcast.com>
	<1108260752.791847.180060@l41g2000cwc.googlegroups.com>
	<Z4ydnbKMDLVvEJLfRVn-hA@comcast.com>
Message-ID: <1108324679.451793.147890@z14g2000cwz.googlegroups.com>

yes the items in std are always single to single, and ext single to
double. basicly the ext are refernce to the std itmes. the second
character in ext is a number depending on how far it is from the item
in std. this is just a simple encoding program.



From steve at holdenweb.com  Thu Feb  3 13:12:00 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 03 Feb 2005 13:12:00 -0500
Subject: global variables
In-Reply-To: <nrWdnRM9Q6Gu_5_fRVn-jw@comcast.com>
References: <1107385488.822768.317250@l41g2000cwc.googlegroups.com>
	<1107388493.465599.140480@g14g2000cwa.googlegroups.com>
	<3YSdnYVEmOCW8pzfRVn-sg@comcast.com>
	<1107391350.933650.321440@z14g2000cwz.googlegroups.com>
	<1107392092.290042.221600@c13g2000cwb.googlegroups.com>
	<pqpMd.102688$Jk5.95091@lakeread01>
	<nrWdnRM9Q6Gu_5_fRVn-jw@comcast.com>
Message-ID: <%UtMd.102705$Jk5.39995@lakeread01>

Steven Bethard wrote:

> Steve Holden wrote:
> 
>> M.E.Farmer wrote:
>>
>>> Ok it has been a long day,
>>> In my reply to Steven Bethard , Steve should read Steven ;)
>>>
>>> M.E.Farmer
>>>
>> Well, since he signs himself "Steve" too I guess we'll just have to 
>> put up with the ambiguities. Or perhaps, given my (lack of) typing 
>> skill, I should just start signing myself "Stvev"?
>>
>> regards
>>  Steve
> 
> 
> Or I can stop correcting it every time I type STeve[1]. ;)
> 
> STeve
> 
> [1] But of course, you probably do the same thing too. ;)

Indeed. I defy anyone to be a crappier typist then me.

Stevbe - see?
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From pobrien at orbtech.com  Mon Feb 14 11:20:11 2005
From: pobrien at orbtech.com (Pat)
Date: 14 Feb 2005 08:20:11 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cupupa$kfs$2@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr><cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr>
Message-ID: <1108398011.213872.321390@o13g2000cwo.googlegroups.com>

Wow!  I must say, I'm less than impressed with the responses so far.  I
know Ilias can give the impression that he is just trolling, but I can
assure you he is not.  At least, not in this case.  ;-)

So in an effort to make some headway, I'm going to try to summarize the
current state of affairs.  The bottom line is that compiling C
extension modules on the Windows platform for Python 2.4 is, today, a
royal pain in the ass.  Period.  Here's why.

The main challenge is that extensions must be compiled using the same
runtime dll as that used by the Python interpreter itself.  The
official Windows binary installation of Python 2.3.5 and its
predecessors was compiled with one MS product, which was fairly easy to
support with minGW, but Python 2.4 was compiled with the newer .NET
compiler.  Unfortunately, compiling extensions for Python 2.4 with the
free MS tools is not trivial, as evidenced by Mike Fletcher's very
thorough document on the subject:

Python 2.4 Extensions w/ the MS Toolkit Compiler

http://www.vrplumber.com/programming/mstoolkit/

In addition, there are some unresolved licensing questions concerning
the .NET runtime file for extensions (msvcr71.dll):

http://mail.python.org/pipermail/python-dev/2005-February/051393.html

There have been extensive discussions about these issues on the
Python-Dev mailing list over the past couple of months (mostly in
December, but continuing to the present - see
http://mail.python.org/pipermail/python-dev/2004-December/thread.html
as a starting point), which seem to have fizzled out or at least
haven't resolved much.  The discussions made reference to work that has
already been done to allow Python to be compiled with minGW:

pyMinGW is a patch to Python source that aims to get Python to compile
under MinGW

http://jove.prohosting.com/iwave/ipython/pyMinGW.html

I've not seen any commentary on the quality of this patch, so that
doesn't appear to be the reason it hasn't been officially adopted.
Reading all the threads from Python-Dev has not enlightened me at all
as to what the underlying reason is for not adopting these changes.
Maybe there are good reasons, I just couldn't find them, and I'm
usually pretty good with Google.

A few of you have mentioned that minGW is not an optimizing compiler on
the Windows platform, whereas the MS .NET one is.  If anyone has
information on the performance differences, I'd really appreciate being
able to see it, particularly as it applies to Python 2.4.

Now, we get to the essence of my particular situation.  I've got a
project that includes some Python extensions written in C.  My users
(who are Python developers, but not necessarily hard-core types) need
to be able to work out of their local Subversion checkouts.  This
includes locally compiling these extensions as necessary.  I'd like
this to work with Python 2.4, and be as painless as possible on my
users.  I can't expect them to purchase a .NET compiler or go through a
bunch of configuration changes.  So far, I haven't figured out a good
way to support this.  I'm open to suggestions.  I suspect that my needs
are very similar to those of the original poster.

Perhaps the issue is in part a matter of minGW catching up with the new
MS compilers.  My understanding of and experience with Python 2.3.5 and
its predecessors has been that Python itself didn't need to be
recompiled with minGW, since extensions compiled with minGW linked to
the same C runtime dll.  So if minGW had support for msvcr71.dll then
maybe this problem goes away with Python 2.4 as well.

If anyone can shed any light on this situation, it would really help me
out.  Thanks.

--
Patrick K. O'Brien
Orbtech    http://www.orbtech.com
Schevo     http://www.schevo.org
Pypersyst  http://www.pypersyst.org



From Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org  Wed Feb  9 17:27:09 2005
From: Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org (Alexander)
Date: Thu, 10 Feb 2005 01:27:09 +0300
Subject: variable declaration
References: <UmSNd.104914$Jk5.59261@lakeread01>
Message-ID: <MSGID_2=3A5025=2F3.131_420abeec@fidonet.org>

Hi, Steve!

07 feb 2005 at 17:51, Steve Holden wrote:
 >> information about variable S to the memory. I don't find big
 >> difference. By the way keyword "def" is as bad as "var", from your
 >> point of view? :)
 SH> If your colloquial English is good enough to understand the word
 SH> "bollocks" then you might begin to realize how irritating your
 SH> arguments are becoming.
Well, I have a dictionary. Let's look. "Man with grey bollocks - wise,
experienced man".Hm, I'am realy have some experience in some areas:)

 SH> If, as you suggest, def were a declaration, then it should either not
 SH> be possible to write
 SH>      if __debug__:
 SH>          def func(x):
 SH>              print x, "is bollocks"

if __debug__:
  ~S=0

S=5 #error in non-debug mode.
print S

That's not the same I suppose from the beginning, but it also can be helpfull.
More exactly, it is not 'variable declaration' but 'variable definition'.

 >> But, I am friendly, even with my opponents. I think it is my good
 >> trait.
 SH> You are, of course, entitled to your opinion, self-serving though it
 SH> may be. A friendly idiot is still an idiot.

No comments.

 >> Don't be so ... I don't find the equivalent english word. Smth like:
 >> Take it more easy.
 SH> Please don't insult the martellibot.

It was not an insult. It is not in my rules, as I said before. It's just an
advice. "global" is in Python, but he is still alive - hence it's not as big
problem as he say.

 SH> He did, after all, write "Python
 SH> in a Nutshell" and co-edited the "Python Cookbook", and he has
 SH> established a reputation with his consistent long-term contribution to
 SH> Python and this newsgroup. Instead, ask yourself why your remarks
 SH> engender such a response from a pillar of the Python community. What
 SH> are your credentials?


Well, for python community - 0. Now, you can only read my messages and think
about them. After all, idiot who made contribution is still idiot, isn't it?
(it's not about A.M., of course)

Alexander, zatv at bk.ru


From francis.girard at free.fr  Sun Feb  6 16:44:42 2005
From: francis.girard at free.fr (Francis Girard)
Date: Sun, 6 Feb 2005 22:44:42 +0100
Subject: string issue
In-Reply-To: <cu0j0f$kf7$1@solaris.cc.vt.edu>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
	<mailman.1909.1107545682.22381.python-list@python.org>
	<cu0j0f$kf7$1@solaris.cc.vt.edu>
Message-ID: <200502062244.42455.francis.girard@free.fr>

Yes, I also this that comprehension is the clearer way to handle this. You 
might also consider the good old "filter" function :

ips = filter(lambda ip: '255' not in ip, ips)

Francis Girard

Le vendredi 4 F?vrier 2005 20:38, rbt a ?crit?:
> Thanks guys... list comprehension it is!
>
> Bill Mill wrote:
> >>>>ips = [ip for ip in ips if '255' not in ip]
> >>>>ips



From deetsNOSPAM at web.de  Tue Feb  8 17:19:27 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Tue, 08 Feb 2005 23:19:27 +0100
Subject: Confused with methods
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>
	<slrnd0enor.26q.apardon@rcpc42.vub.ac.be>
	<1grmd4z.1tlm4e61650vedN%aleaxit@yahoo.com>
	<slrnd0f07t.26q.apardon@rcpc42.vub.ac.be>
	<1grmg8s.17t7tj4180jdj6N%aleaxit@yahoo.com>
	<slrnd0gsel.26q.apardon@rcpc42.vub.ac.be>
Message-ID: <cubdtf$cue$04$1@news.t-online.com>

> No python is not consistent and your continuous repetion doesn't
> make it so. To illustrate, here the following code:
> 
> class A:
>   l = []
>   def f(): pass
> 
> a = A()
> print a.l is A.l
> print a.f is A.f
> 
> which produces:
> 
> True
> False

Thats only inconsistent from your POV because you refuse to accept that the
scope of a function definition does matter. And as usual its a topic of
totally unrelevant practical impact and an expression of your strangely
deeprooted desire to nitpick at such unrelevant details. 

Why don't you pick something that really bothers people and see if your
skills (that I'm sure exist) can be of use there?

--

Regards,

Diez B. Roggisch


From ruach at chpc.utah.edu  Fri Feb 11 15:14:27 2005
From: ruach at chpc.utah.edu (Matthew Thorley)
Date: Fri, 11 Feb 2005 13:14:27 -0700
Subject: problem with tk and pass by refference (I think :)
In-Reply-To: <cuiv3n$681$04$1@news.t-online.com>
References: <cuitgv$r4i$1@vegh.ks.cc.utah.edu>
	<cuiv3n$681$04$1@news.t-online.com>
Message-ID: <cuj3os$1t2$1@vegh.ks.cc.utah.edu>

Diez B. Roggisch wrote:
> Hi,
> 
> button = Button(self.songWin, text=verse, command=(lambda num=verseNum:
> self.showVerse(num)) )
> 
> should do the trick. The reason is basically that your version kept a
> reference to verseNum - and when executed, the value verseNum points to is
> the lasts one stored.
> 
> Rebinding the argument to a parameter in the lambda will keep the right
> value for each iteration.
> 
> 
I tried it but I got a syntax error. The interpreter didn't like the 
equals sign in the lambda. I am using python 2.3.4. Is there another way 
of writing that?

thanks


From carl.manaster at gmail.com  Thu Feb  3 12:47:43 2005
From: carl.manaster at gmail.com (carl.manaster at gmail.com)
Date: 3 Feb 2005 09:47:43 -0800
Subject: Integrated Testing - Peppable?
In-Reply-To: <1102ntulmp5sud3@news.supernews.com>
References: <1107373949.960435.212020@z14g2000cwz.googlegroups.com>
	<1102ntulmp5sud3@news.supernews.com>
Message-ID: <1107452863.177567.95250@o13g2000cwo.googlegroups.com>

Thanks, John,

I think there's a true, powerful, difference between inline tests and
external (albeit adjacent) ones.  I think the developer experience
should be superior with inline tests for several reasons:
- during initial development, without any navigation beyond the Enter
key, you flow directly from writing the test to writing the code that
implements it;
- later, on review, the tests have not moved away from the code they
test, so:
----if there are errors, the alarms show up right beside the erroneous
code;
----if you are looking for examples of how to call a routine, the
example is right there.

But I take your point; this doesn't belong in Python.  OK.  Thanks.

Peace,
--Carl



From mahs at telcopartners.com  Fri Feb 18 09:27:15 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 18 Feb 2005 06:27:15 -0800
Subject: Solution for architecure dependence in Numeric ?
In-Reply-To: <67ll9mymqu.fsf@achernar.i-did-not-set--mail-host-address--so-shoot-me>
References: <67ll9mymqu.fsf@achernar.i-did-not-set--mail-host-address--so-shoot-me>
Message-ID: <cv4tq6$ld1$1@sea.gmane.org>

"Johannes Nix|Johannes.Nix"@uni-oldenburg.de wrote:
> Hi,
> 
> I have a tricky problem with Numeric. Some time ago, I have generated
> a huge and complex data structure, and stored it using the cPickle
> module. Now I want to evaluate it quickly again on a workstation
> cluster with 64-Bit Opteron CPUs - I have no more than three days to
> do this. Compiling Python and running Numeric has been no problem at
> all. However, I get an error message when accessing the data pickled
> before. (I can load it regularly on 32 bit computers, but it is a
> quite complex data object, so I really don't want to store every
> element as ASCII data).  The problem seems to be with 64 Bit integers
> (with 32-bit-floats, no problem was observed).
> 
> This looks like that (from the Unix command shell):
> 
> 
> jnix at 32bithost:~> python ~/python/test_npickle.py  -dump test.pck
> jnix at 32bithost:~> python ~/python/test_npickle.py  test.pck
> [0 1 2 3 4 5 6 7 8 9]
> jnix at 32bithost:~> ssh 64bithost python ~/python/test_npickle.py  test.pck
> Traceback (most recent call last):
>   File "/home/jnix/python/test_npickle.py", line 16, in ?
>     a = cPickle.load(file(filename))
>   File "/home/jnix/lib/python2.4/SuSE-9.0/x86_64/Numeric/Numeric.py", line 520, in array_constructor
>     x.shape = shape
> ValueError: ('total size of new array must be unchanged', <function array_constructor at 0x2a960b0b18>, ((10,), 'l', '\x00\x00\x00\x00\x01\x00\x00\x00\x02\x00\x00\x00\x03\x00\x00\x00\x04\x00\x00\x00\x05\x00\x00\x00\x06\x00\x00\x00\x07\x00\x00\x00\x08\x00\x00\x00\t\x00\x00\x00', 1))
> 
> 
> also I get:
> jnix at 32bithost:~> python -c "import Numeric; print Numeric.arange(0).itemsize()"
> 4
> jnix at 64bithost:~>  python -c "import Numeric; print Numeric.arange(0).itemsize()"
> 8
> 
> 
> The script used to produce the example above is:
> 
> -------------------------------------------------------------------------
> #/usr/bin/python
> # -*- coding: latin1 -*-
> 
> import Numeric
> import cPickle
> import sys
> 
> if len(sys.argv) > 1 and sys.argv[1] == '-dump':
>     filename = sys.argv[2]
>     binary=1
>     a = Numeric.arange(10) 
>     cPickle.dump(a, file(filename,'w',binary))
> 
> else:
>     filename = sys.argv[1]
>     a = cPickle.load(file(filename))
>     print a
>     
> 
> ---------------------------------------------------------------------
> 
> 
> So what would you suggest ? Can I hack Numeric to assume non-native
> 32 bit integer numbers ?
> 
> Many thanks for any help,
> 
> Johannes
It might be worth posting to the Numeric mailing list, mirrored at 
http://news.gmane.org/gmane.comp.python.numeric.general



From aleaxit at yahoo.com  Sun Feb  6 17:56:07 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 6 Feb 2005 23:56:07 +0100
Subject: Python versus Perl ?
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
	<slrnd0cofg.rr5.jgrahn-nntq@frailea.sa.invalid>
	<1107726328.158314.265680@o13g2000cwo.googlegroups.com>
	<mailman.2038.1107727355.22381.python-list@python.org>
Message-ID: <1grl63x.1f2tzwz1q984vpN%aleaxit@yahoo.com>

snacktime <snacktime at gmail.com> wrote:

> The one drawback coming from the perl world is that you don't have as
> many options when it comes stuff like application frameworks, and some

URK -- _my_ feeling is that we have entirely *too many* options for
stuff like web application frameworks, GUI toolkits, XML processing, ...


Alex


From aleaxit at yahoo.com  Mon Feb  7 10:44:09 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 7 Feb 2005 16:44:09 +0100
Subject: Confused with methods
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>
	<slrnd0enor.26q.apardon@rcpc42.vub.ac.be>
	<1grmd4z.1tlm4e61650vedN%aleaxit@yahoo.com>
	<slrnd0f07t.26q.apardon@rcpc42.vub.ac.be>
Message-ID: <1grmg8s.17t7tj4180jdj6N%aleaxit@yahoo.com>

Antoon Pardon <apardon at forel.vub.ac.be> wrote:

> Yes it is inconsistent with the rest of python. That you found
> a subset in which it is consistent doesn't change that.
> 
> And what if you do:
> 
>   c = C()
>   c.f = g
> 
> 
> The fact that a function in a class performs a lot of magic if
> it is called through an instance, that isn't performed otherwise,
> makes python inconsistent here. You may like the arrangement
> (and it isn't such a big deal IMO) but that doesn't make it consistent.

Any descriptor (be it a function or otherwise) has its __get__ method
called, when _accessed_ by attribute syntax, if and only if that
descriptor is in a class.  _ALL_ of Python is perfectly consistent on
this point, and if I didn't already know the kind of crazy and obviously
false assertions that you post *QUITE* consistently, I would be
astonished to see you claim otherwise.  Knowing your posts, this latest
idiocy is perfectly "par for the course".

"A lot of magic" is simply a stupid and imprecise way to describe "the
__get__ method gets called".  Saying that any of this happens when the
function is CALLED is a definitely more serious mistake, since it's
absolutely obvious that the __get__ method is called when the function
(or any other attribute) is *ACCESSED* -- the call operation (on
whatever object __get__ returns) happens AFTERWARDS.

Why you, and a few other habitual trolls, keep lowering the signal to
noise ratio of this newsgroup with your blatherings, I don't know; I'm
sure this behavior must be giving you guys some kind of satisfaction.
Whether the damage you do to the clarity of the issues, and to the
understanding of newbies who are unfortunate enough to read and trust
the many imprecise and/or utterly false assertions you keep making, with
totally unjustified airs of competence, is part of your jollies, or just
a side effect you don't care a whit about, I don't know either.  Guess
I'll just killfile you for another month now -- wish MacSOUP had a
simple way to to permanent killfiling, since it's pretty obvious by now
that it's quite unlikely you'll even post anything worthwhile at all.


Alex


From rigga at hasnomail.com  Sun Feb 27 12:02:00 2005
From: rigga at hasnomail.com (Rigga)
Date: Sun, 27 Feb 2005 17:02:00 GMT
Subject: Need help running external program
Message-ID: <c2nUd.3268977$B07.514197@news.easynews.com>

Hi,

I am running the line of code below from a shell script and it works fine,
however I am at a total loss on how i can run it from within a Python
script as every option I have tried fails and it appears to be down to the
escaping of certain characters.

wget -q www.anywebpage.com -O - | tr '\r' '\n' | tr \' \" | sed -n
's/.*url="\([^"]*\)".*/\1/p'

I want to use the above code in my program by using popen2 so i can query
the results i.e.

output, input = popen2("the code here")

print output

Any help would be appreciated.

Many thanks

RiGGa






From steven.bethard at gmail.com  Mon Feb 28 13:32:22 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 28 Feb 2005 11:32:22 -0700
Subject: naming convention for scalars, lists, dictionaries ...
In-Reply-To: <1109613115.760962.292360@z14g2000cwz.googlegroups.com>
References: <1109613115.760962.292360@z14g2000cwz.googlegroups.com>
Message-ID: <3YydnR3xNd4k_r7fRVn-3g@comcast.com>

beliavsky at aol.com wrote:
> Since Python does not have declarations, I wonder if people think it is
> good to name function arguments according to the type of data structure
> expected, with names like "xlist" or "xdict".

In general, I find that naming collections for their contents is much 
more useful than some abbreviated type prefix.  However, while I don't 
name objects by their type, I do tend to name iterables with plurals 
(e.g. "words", "feature_indices", "events", etc.) and I typically suffix 
mapping types with "map" (e.g. "word_index_map", "event_relation_map", 
"prime_factor_map", etc.)

STeVe


From roy at panix.com  Sat Feb  5 08:31:22 2005
From: roy at panix.com (Roy Smith)
Date: Sat, 05 Feb 2005 08:31:22 -0500
Subject: variable declaration
References: <1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
Message-ID: <roy-214B3A.08312205022005@reader2.panix.com>

In article <MSGID_2=3A5025=2F3.131_4204c40a at fidonet.org>,
 Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org (Alexander 
 Zatvornitskiy) wrote:

> And, one more question: do you think code like this:
> 
> var S=0
> var eps
> 
> for eps in xrange(10):
>   S=S+ups
> 
> is very bad? Please explain your answer:)

Let me answer that by way of counter-example.

Yesterday I was writing a little perl script.  I always use "use strict" in 
perl, which forces me to declare my variables.  Unfortunately, my code was 
giving me the wrong answer, even though the interpreter wasn't giving me 
any error messages.

After a while of head-scratching, it turned out that I had written "$sum{x} 
+= $y" instead of "$sum{$x} += $y".  The need to declare variables didn't 
find the problem.  I *still* needed to test my work.  Given that I needed 
to write tests anyway, the crutch of having to declare my variables really 
didn't do me any good.


From news at NOwillmcguganSPAM.com  Sun Feb 27 07:03:15 2005
From: news at NOwillmcguganSPAM.com (Will McGugan)
Date: Sun, 27 Feb 2005 12:03:15 +0000
Subject: Googlewhacker
In-Reply-To: <4221b671$0$8752$db0fefd9@news.zen.co.uk>
References: <4221b671$0$8752$db0fefd9@news.zen.co.uk>
Message-ID: <4221b704$0$8752$db0fefd9@news.zen.co.uk>

Will McGugan wrote:
> Hi folks,
> 
> Has anyone seen 'Googlewhack Adventure'?
> 
> http://www.davegorman.com/googlewhack.htm
> 
> I wrote a script to generate Googlewhacks - thought I'd share it with 
> you. I'd better stop running it as I fear Google may ban my IP for 
> making 20 searches a seconds..

Oops, wrong script..

Will
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From tjreedy at udel.edu  Sun Feb  6 03:30:08 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 6 Feb 2005 03:30:08 -0500
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
References: <ctsjmg$75p$1@usenet.otenet.gr><pan.2005.02.03.19.10.39.349763@jerf.org>	<cu2m3q$km1$1@usenet.otenet.gr><mailman.1999.1107644058.22381.python-list@python.org>
	<cu4ahl$a0s$1@usenet.otenet.gr>
Message-ID: <cu4kgi$v2j$1@sea.gmane.org>


"Ilias Lazaridis" <ilias at lazaridis.com> wrote in message

>> Then 'print html_doc_instance' can print the html doc corresponding to 
>> the object model.
>
> I understand this procedure.
>
> I would like to use a standard way, which uses the standard metadata 
> [implicit/explicit defined].
>
> Does such standard exist?

I am not sure of what *you* mean by 'standard way'.  That is probably 
because Python and the community is not big on 'standard ways' other than 
what is specified in the two reference manuals.  And even then, Python is 
intentionally flexible in various ways (though not all).  So the answer to 
your question is probably 'no'.

Terry J. Reedy





From kent3737 at yahoo.com  Sun Feb  6 07:34:07 2005
From: kent3737 at yahoo.com (Kent Johnson)
Date: Sun, 06 Feb 2005 07:34:07 -0500
Subject: changing local namespace of a function
In-Reply-To: <cu4f5r$bu0$1@joe.rice.edu>
References: <cu0lru$8ik$1@joe.rice.edu>
	<cu0sj5$sfk$1@sea.gmane.org>	<4204400C.5060608@iinet.net.au>
	<mailman.1948.1107575575.22381.python-list@python.org>
	<cu1l9o$3oq$1@joe.rice.edu> <cu3d3j$h09$1@joe.rice.edu>
	<42057a48$1_2@newspeer2.tds.net> <cu4f5r$bu0$1@joe.rice.edu>
Message-ID: <42060bf7$1_3@newspeer2.tds.net>

Bo Peng wrote:
> Kent Johnson wrote:
>> You are still including the compile overhead in fun2. If you want to 
>> see how fast the compiled code is you should take the definition of 
>> myfun out of fun2:
> 
> I assumed that most of the time will be spent on N times execution of 
> myfunc.

Doh! Right.

Kent


From rbt at athop1.ath.vt.edu  Wed Feb 16 11:08:11 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Wed, 16 Feb 2005 11:08:11 -0500
Subject: more os.walk() issues... probably user error
Message-ID: <cuvr5b$2ei$1@solaris.cc.vt.edu>

This function is intended to remove unwanted files and dirs from 
os.walk(). It will return correctly *IF* I leave the 'for fs in 
fs_objects' statement out (basically leave out the entire purpose of the 
function).

It's odd, when the program goes into that statment... even when only a 
'pass', and nothing else is present, nothing is returned. Why is that? 
I'm testing Python 2.4 on Linux x86 and WinXP. Results are the same on 
either platform.

     def build_clean_list(self, path):

         file_skip_list = ['search_results.txt']
         dir_skip_list = ['dev', 'proc', 'Temporary Internet Files']

         fs_objects = os.walk(path, topdown=True)
##      for fs in fs_objects:
##
##            for f in fs[2]:
##                if f in file_skip_list:
##                    print f
##                    fs[2].remove(f)
##
##            for d in fs[1]:
##                if d in dir_skip_list:
##                    print d
##                    fs[1].remove(d)

         return fs_objects




From zanesdad at bellsouth.net  Thu Feb 10 12:49:52 2005
From: zanesdad at bellsouth.net (Jeremy Jones)
Date: Thu, 10 Feb 2005 12:49:52 -0500
Subject: [N00B] What's %?
In-Reply-To: <614c778e.0502100938.6665cb52@posting.google.com>
References: <614c778e.0502100938.6665cb52@posting.google.com>
Message-ID: <420B9EC0.4040903@bellsouth.net>

administrata wrote:

>Hi! it's been about a week learning python!
>I've read 'python programming for the absolute begginer'
>I don't understand about % like...
>
>107 % 4 = 3
>7 % 3 = 1
>
>I'm confused with division :/
>Please help me...
>
>thx 4 reading.
>  
>
% is the remainder operator (I think it's also called modulus).

107 % 4 == 3
because
107 / 4 == 26 R3

and 7 % 3 == 1
because 7 / 3 == 2 R1


HTH,

Jeremy Jones


From JoshuaACohen at gmail.com  Thu Feb 10 10:48:11 2005
From: JoshuaACohen at gmail.com (Josh)
Date: 10 Feb 2005 07:48:11 -0800
Subject: Reportlab and Barcodes
In-Reply-To: <36vtjbF50fr4bU1@individual.net>
References: <1107894763.331701.26470@c13g2000cwb.googlegroups.com>
	<mailman.2252.1107964089.22381.python-list@python.org>
	<1107965379.046718.248000@c13g2000cwb.googlegroups.com>
	<1107976931.161073.258600@f14g2000cwb.googlegroups.com>
	<36vtjbF50fr4bU1@individual.net>
Message-ID: <1108050491.469126.302100@z14g2000cwz.googlegroups.com>

Damjan,

Code39 here refers to part of the Barcode Extensions available to
Reportlabs. It can be imported as such

from reportlab.extensions.barcode import code39

Josh



From gae at thextron.no  Wed Feb  9 06:03:51 2005
From: gae at thextron.no (Geir Arne Evjen)
Date: 9 Feb 2005 03:03:51 -0800
Subject: I don't have a clue what this is (py2exe?)
Message-ID: <699a1276.0502090303.490bdc9d@posting.google.com>

I'm having a strange problem which I hope some python experts out
there could help me with.

I'm implementing a COM server where I do a lot of xml-rpc calls to a
zope server. The communication is done over ssh with portforwarding
(8080) using putty.

To distribute the COM server I'm using py2exe to create exe files. 
I've implemented the COM server on a windows XP computer, but I'm
testing it on a windows 2000 computer. The strange thing is that on
the 2000 computer the xmlrpc-documents seems to be truncated somewhere
at the and and the xmlrpc reader (expat) complains abount invalid tags
(used by xmlrpclib). This only happens in some occations and for large
documents (~200Kb).

I've checked what putty recives in its logfile there is nothing wrong
with what the zope server returns.

Also, the strange this is that if I register (using the source) the
COM server directly in the python intepreter the COM server works
perfectly (both with or without debugging).

I really don't know where this problem comes from and I don't have a
clue where to search.

Any tips would be very much appreciated.

I'm using 
python 2.3.4
win32all build 203
py2exe 0.5.4

Best regards
Geir Arne Evjen


From steven.bethard at gmail.com  Thu Feb 10 13:56:45 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 10 Feb 2005 11:56:45 -0700
Subject: namespaces module (a.k.a. bunch, struct, generic object, etc.) PEP
Message-ID: <GaudndOHLML3M5bfRVn-vg@comcast.com>

In the "empty classes as c structs?" thread, we've been talking in some 
detail about my proposed "generic objects" PEP.  Based on a number of 
suggestions, I'm thinking more and more that instead of a single 
collections type, I should be proposing a new "namespaces" module 
instead.  Some of my reasons:

(1) Namespace is feeling less and less like a collection to me.  Even 
though it's still intended as a data-only structure, the use cases seem 
pretty distinct from other collections.

(2) I think there are a couple different types that should be provided, 
not just one.  For example:

* The suggested namespace view (which allows, for example, globals() to 
be manipulated with the getattr protocol) should probably be its own 
class, NamespaceView, since the behavior of a NamespaceView is 
substantially different from that of a Namespace.  (Modifying a 
NamespaceView modifies the dict, while modifying a Namespace doesn't.) 
This also allows NamespaceView to have a separate __repr__ to indicate 
some of the differences.

* The suggested namespace chain, if included, should also probably be 
its own class, NamespaceChain.  As defined, it doesn't depend on 
Namespace at all -- it could be used just as well for other 
non-Namespace objects...


I've updated the PEP to reflect these changes.  Comments and suggestions 
greatly appreciated!  (Note that I've included the current 
implementation of the module at the end of the PEP.)

----------------------------------------------------------------------
PEP: XXX
Title: Attribute-Value Mapping Data Type
Version:
Last-Modified:
Author: Steven Bethard <steven.bethard at gmail.com>
Status: Draft
Type: Standards Track
Content-Type: text/x-rst
Created: 10-Feb-2005
Python-Version: 2.5
Post-History: 10-Feb-2005


Abstract
========

This PEP proposes a standard library addition to support the simple
creation of attribute-value mappping objects which can be given named
attributes without the need to declare a class. Such attribute-value
mappings are intended to complement the name-value mappings provided
by Python's builtin dict objects.


Motivation
==========

Python's dict objects provide a simple way of creating anonymous
name-value mappings. These mappings use the __getitem__ protocol to
access the value associated with a name, so that code generally
appears like::

     mapping['name']

Occasionally, a programmer may decide that dotted-attribute style
access is more appropriate to the domain than __getitem__ style
access, and that their mapping should be accessed like::

     mapping.name

Currently, if a Python programmer makes this design decision, they
are forced to declare a new class, and then build instances of this
class. When no methods are to be associated with the attribute-value
mappings, declaring a new class can be overkill.  This PEP proposes
adding a new module to the standard library to provide a few simple
types that can be used to build such attribute-value mappings.

Providing such types allows the Python programmer to determine which
type of mapping is most appropriate to their domain and apply this
choice with minimal effort.  Some of the suggested uses include:


Returning Named Results
-----------------------

It is often appropriate for a function that returns multiple items to
give names to the different items returned.  The types suggested in
this PEP provide a simple means of doing this that allows the
returned values to be accessed in the usual attribute-style access::

     >>> def f(x):
     ...     return Namespace(double=2*x, squared=x**2)
     ...
     >>> y = f(10)
     >>> y.double
     20
     >>> y.squared
     100


Representing Hierarchical Data
------------------------------

The types suggested in this PEP also allow a simple means of
representing hierarchical data that allows attribute-style access::

     >>> x = Namespace(spam=Namespace(rabbit=1, badger=[2]), ham='3')
     >>> x.spam.badger
     [2]
     >>> x.ham
     '3'


Manipulating Dicts through Attributes
-------------------------------------

Sometimes it is desirable to access the items of an existing dict
object using dotted-attribute style access instead of __getitem__
style access. The types suggested in this PEP provide a simple means
of doing so::

     >>> d = {'name':'Pervis', 'lumberjack':True}
     >>> ns = NamespaceView(d)
     >>> ns
     NamespaceView(lumberjack=True, name='Pervis')
     >>> ns.rugged = False
     >>> del ns.lumberjack
     >>> d
     {'rugged': False, 'name': 'Pervis'}


Rationale
=========

As Namespace objects are intended primarily to replace simple,
data-only classes, simple Namespace construction was a primary
concern.  As such, the Namespace constructor supports creation from
keyword arguments, dicts, and sequences of (attribute, value) pairs::

     >> Namespace(eggs=1, spam=2, ham=3)
     Namespace(eggs=1, ham=3, spam=2)
     >>> Namespace({'eggs':1, 'spam':2, 'ham':3})
     Namespace(eggs=1, ham=3, spam=2)
     >>> Namespace([('eggs',1), ('spam',2), ('ham',3)])
     Namespace(eggs=1, ham=3, spam=2)

To allow attribute-value mappings to be easily combined, the
Namespace type provides a update staticmethod that supports similar
arguments::

     >>> ns = Namespace(eggs=1)
     >>> Namespace.update(ns, [('spam', 2)], ham=3)
     >>> ns
     Namespace(eggs=1, ham=3, spam=2)

Note that update should be used through the class, not through the
instances, to avoid the confusion that might arise if an 'update'
attribute added to a Namespace instance hid the update method.


Namespace objects support also object equality, comparing Namespace
objects by attributes recursively::

     >>> x = Namespace(parrot=Namespace(lumberjack=True, spam=42), 
peng='shrub')
     >>> y = Namespace(peng='shrub', parrot=Namespace(spam=42, 
lumberjack=True))
     >>> z = Namespace(parrot=Namespace(lumberjack=True), peng='shrub')
     >>> x == y
     True
     >>> x == z
     False


NamespaceView objects are intended to allow manipulating dict objects
through the getattr protocol instead of the getitem protocol.  For
example usage, see "Viewing Dict Items as Attributes" above.


Note that support for the various mapping methods, e.g.
__(get|set|del)item__, __len__, __iter__, __contains__, items, keys,
values, etc. was intentionally omitted as these methods did not seem
to be necessary for the core uses of an attribute-value mapping.  If
such methods are truly necessary for a given use case, this may
suggest that a dict object is a more appropriate type for that use.


Examples
=========

Converting an XML DOM tree into a tree of nested Namespace objects::

     >>> import xml.dom.minidom
     >>> def gettree(element):
     ...     result = Namespace()
     ...     if element.attributes:
     ...         Namespace.update(result, element.attributes.items())
     ...     children = {}
     ...     for child in element.childNodes:
     ...         if child.nodeType == xml.dom.minidom.Node.TEXT_NODE:
     ...             children.setdefault('text', []).append(
     ...                 child.nodeValue)
     ...         else:
     ...             children.setdefault(child.nodeName, []).append(
     ...                 gettree(child))
     ...     Namespace.update(result, children)
     ...     return result
     ...
     >>> doc = xml.dom.minidom.parseString("""\
     ... <xml>
     ...   <a attr_a="1">
     ...     a text 1
     ...     <b attr_b="2" />
     ...     <b attr_b="3"> b text </b>
     ...     a text 2
     ...   </a>
     ...   <c attr_c="4"> c text </c>
     ... </xml>""")
     >>> tree = gettree(doc.documentElement)
     >>> tree.a[0].b[1]
     Namespace(attr_b=u'3', text=[u' b text '])

Reference Implementation
========================

::
     class Namespace(object):
         """Namespace([namespace|dict|seq], **kwargs) -> Namespace object

         The new Namespace object's attributes are initialized from (if
         provided) either another Namespace object's attributes, a
         dictionary, or a sequence of (name, value) pairs, then from the
         name=value pairs in the keyword argument list.
         """

         def __init__(*args, **kwargs):
             """Initializes a Namespace instance."""
             # inheritance-friendly update call
             type(args[0]).update(*args, **kwargs)

         def __eq__(self, other):
             """x.__eq__(y) <==> x == y

             Two Namespace objects are considered equal if they have the
             same attributes and the same values for each of those
             attributes.
             """
             return (other.__class__ == self.__class__ and
                     self.__dict__ == other.__dict__)

         def __repr__(self):
             """x.__repr__() <==> repr(x)

             If all attribute values in this namespace (and any nested
             namespaces) are reproducable with eval(repr(x)), then the
             Namespace object is also reproducable for eval(repr(x)).
             """
             return '%s(%s)' % (
                 type(self).__name__,
                 ', '.join('%s=%r' % (k, v) for k, v in sorted(
                     self.__dict__.iteritems())))

         def update(*args, **kwargs):
             """Namespace.update(ns, [ns|dict|seq,] **kwargs) -> None

             Updates the first Namespace object's attributes from (if
             provided) either another Namespace object's attributes, a
             dictionary, or a sequence of (name, value) pairs, then from
             the name=value pairs in the keyword argument list.
             """
             if not 1 <= len(args) <= 2:
                 raise TypeError('expected 1 or 2 arguments, got %i' %
                                 len(args))
             self = args[0]
             if not isinstance(self, Namespace):
                 raise TypeError('first argument to update should be '
                                 'Namespace,  not %s' %
                                 type(self).__name__)
             if len(args) == 2:
                 other = args[1]
                 if isinstance(other, Namespace):
                     other = other.__dict__
                 try:
                     self.__dict__.update(other)
                 except (TypeError, ValueError):
                     raise TypeError('cannot update Namespace with %s' %
                                     type(other).__name__)
             self.__dict__.update(kwargs)


     class NamespaceView(Namespace):
         """NamespaceView(dict) -> new Namespace view of the dict

         Creates a Namespace that is a view of the original dictionary,
         that is, changes to the Namespace object will be reflected in
         the dictionary, and vice versa.
         """
         def __init__(self, d):
             self.__dict__ = d


Open Issues
===========
What should the types be named?  Some suggestions include 'Bunch',
'Record', 'Struct' and 'Namespace'.

Where should the types be placed?  The current suggestion is a new
"namespaces" module.

Should namespace chaining be supported?  One suggestion would add a
NamespaceChain object to the module::

     class NamespaceChain(object):
         """NamespaceChain(*objects) -> new attribute lookup chain

         The new NamespaceChain object's attributes are defined by the
         attributes of the provided objects.  When an attribute is
         requested, the sequence is searched sequentially for an object
         with such an attribute.  The first such attribute found is
         returned, or an AttributeError is raised if none is found.

         Note that this chaining is only provided for getattr and delattr
         operations -- setattr operations must be applied explicitly to
         the appropriate objects.

         The list of objects is stored in a NamespaceChain object's
         __namespaces__ attribute.
         """
         def __init__(self, *objects):
             """Initialize the NamespaceChain object"""
             self.__namespaces__ = objects

         def __getattr__(self, name):
             """Return the first such attribute found in the object list
             """
             for obj in self.__namespaces__:
                 try:
                     return getattr(obj, name)
                 except AttributeError:
                     pass
             raise AttributeError(name)

         def __delattr__(self, name):
             """Delete the first such attribute found in the object list
             """
             for obj in self.__namespaces__:
                 try:
                     return delattr(obj, name)
                 except AttributeError:
                     pass
             raise AttributeError(name)


References
==========





..
    Local Variables:
    mode: indented-text
    indent-tabs-mode: nil
    sentence-end-double-space: t
    fill-column: 70
    End:


From CathleenB at concord.etransmail4.com  Wed Feb 16 03:27:18 2005
From: CathleenB at concord.etransmail4.com (Cathleen Baer)
Date: Wed, 16 Feb 2005 00:27:18 -0800
Subject: How new Check 21 legislation is affecting you...
Message-ID: <26904959.1108542438254.JavaMail.customerService@etransmail4.com>

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Thank you very much. 

Cathleen Baer                                     
Marketing & Relationship Representative
Globalzon Consulting Group 




From rparnes at megalink.net  Tue Feb  8 07:29:48 2005
From: rparnes at megalink.net (Bob Parnes)
Date: Tue, 08 Feb 2005 12:29:48 -0000
Subject: User Identification
Message-ID: <slrnd0hc3d.1pq.rparnes@debian.localdomain>

I have a python program on a server of an all-linux network. It needs to 
record the user name running it. Is there a way for the program to extract
the name from the system without a separate log-in dialog?

Bob Parnes

-- 
Bob Parnes
rparnes at megalink.net


From bearophileHUGS at lycos.com  Sat Feb 19 13:34:49 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 19 Feb 2005 10:34:49 -0800
Subject: exercise: partition a list by equivalence
In-Reply-To: <1108837453.883740.309270@f14g2000cwb.googlegroups.com>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<mailman.2803.1108743668.22381.python-list@python.org>
	<1108768870.455974.244590@c13g2000cwb.googlegroups.com>
	<eppstein-8851A4.18394418022005@news.service.uci.edu>
	<1108837453.883740.309270@f14g2000cwb.googlegroups.com>
Message-ID: <1108838089.897928.219590@z14g2000cwz.googlegroups.com>

Bearophile:
> I presume the complexity is O(n+a); n (the nodes)
> is proportional to the number of pairs, and a
> (the arcs) depends on the "intricacy" of the input pairs.

Opps... n (the number of nodes) is the number of different numbers
contained in the pairs :-]

Bearophile



From duncan.booth at invalid.invalid  Thu Feb 17 12:11:33 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 17 Feb 2005 17:11:33 GMT
Subject: difference between class methods and instance methods
References: <pan.2005.02.17.07.04.37.907754@yahooz.com>
	<Xns96005FE3164DAduncanrcpcouk@127.0.0.1>
	<1119g2rre5g610c@corp.supernews.com>
Message-ID: <Xns9600AEDF1A4BDduncanrcpcouk@127.0.0.1>

John wrote:
>> Note that it doesn't matter whether you call instance.foo(2)
>> directly, or bind instance.foo to a variable first. Either will
>> create a *new* bound method object, and the correct instance is used
>> for the call. 
> 
> Za! What do you mean, "create a new bound method object"? I *already*
> created that method when I def'd it inside the 'class Demo' statement,
> no?
> 
The def statement creates a function.
Accessing the method through the class creates a brand new unbound method 
from the function. Every access of the method through the class creates a 
separate unbound method.

Accessing the method through the instance creates a brand new bound method. 
Every such access creates a separate bound method.

> 
> ... hmm... bound methods get created each time you make
> a call to an instance method via an instance of the given class?
> 
you've got it.


From steven.bethard at gmail.com  Fri Feb  4 14:32:30 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 04 Feb 2005 12:32:30 -0700
Subject: string issue
In-Reply-To: <cu0i3o$jc6$1@solaris.cc.vt.edu>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
Message-ID: <v_GdnZKBztlRUJ7fRVn-ig@comcast.com>

rbt wrote:
> Either I'm crazy and I'm missing the obvious here or there is something 
> wrong with this code. Element 5 of this list says it doesn't contain the 
> string 255, when that's *ALL* it contains... why would it think that???
> 
> import time
> 
> ips = ['255.255.255.255', '128.173.120.79', '198.82.247.98', 
> '127.0.0.1', '255.0.0.0', '255', '128.173.255.34']
> 
> for ip in ips:
>     if '255' in ip:
>         try:
>             print "Removing", ip
>             ips.remove(ip)
>         except Exception, e:
>             print e
> 
> print ips
> time.sleep(5)
> 
> Someone tell me I'm going crazy ;)

You're going crazy. ;)

py> ips = ['255.255.255.255', '128.173.120.79', '198.82.247.98', 
'127.0.0.1', '255.0.0.0', '255', '128.173.255.34']
py> for ip in ips:
...     # debugging statement:
...     print "Looking at", ip
...     if '255' in ip:
...         try:
...             print "Removing", ip
...             ips.remove(ip)
...         except Exception, e:
...             print e
...
Looking at 255.255.255.255
Removing 255.255.255.255
Looking at 198.82.247.98
Looking at 127.0.0.1
Looking at 255.0.0.0
Removing 255.0.0.0
Looking at 128.173.255.34
Removing 128.173.255.34

Notice how elements of your list are being skipped.  The problem is that 
you're modifying a list while you iterate over it.

Why don't you try a list comprehension:

py> ips = ['255.255.255.255', '128.173.120.79', '198.82.247.98', 
'127.0.0.1', '255.0.0.0', '255', '128.173.255.34']
py> [ip for ip in ips if '255' not in ip]
['128.173.120.79', '198.82.247.98', '127.0.0.1']

Steve


From ncoghlan at iinet.net.au  Thu Feb 10 07:49:39 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Thu, 10 Feb 2005 22:49:39 +1000
Subject: variable declaration
In-Reply-To: <slrnd0mg7t.26q.apardon@rcpc42.vub.ac.be>
References: <4202A022.3050209@netscape.net>	<MSGID_2=3A5025=2F3.131_4204b0a9@fidonet.org>	<mailman.1978.1107622451.22381.python-list@python.org>	<slrnd0epjg.26q.apardon@rcpc42.vub.ac.be>	<mailman.2069.1107783321.22381.python-list@python.org>	<slrnd0esqn.26q.apardon@rcpc42.vub.ac.be>	<mailman.2152.1107854937.22381.python-list@python.org>	<slrnd0h3e9.26q.apardon@rcpc42.vub.ac.be>	<mailman.2156.1107859510.22381.python-list@python.org>	<slrnd0h9r8.26q.apardon@rcpc42.vub.ac.be>	<mailman.2239.1107951749.22381.python-list@python.org>
	<slrnd0mg7t.26q.apardon@rcpc42.vub.ac.be>
Message-ID: <420B5863.1080400@iinet.net.au>

Antoon Pardon wrote:
> Well it seems you have some fair points. I'll just stop here stating
> that I would like to have it, even if it proved to be slower. Speed
> is not that big a factor in the things I write.

Oh, certainly. I wasn't suggesting the speed hit was enough to kill the idea - I 
was just pointing it was something that you would use when correctness and being 
explicit was considered more important than a small price in speed. And if the 
name check got optimised out like an assert does. . . Hey, that gives me an idea 
(see below).

> I just would like
> to ask a question relating semantics. Supose the following code.
> 
> x = 42
> 
> def f():
>   x := 21   #  or x .= 42  I don't remember what you used exactly

Alex used ':=' in a couple of examples, but you'll have to ask him his reasons.

I used '.=' instead mainly because I think colons are ugly, but also because 
':=' has the ability to trigger confusion due to its slightly different use in 
those languages which use it for assignment (Eiffel and Pascal come to mind. . . 
since Pascal uses it, I guess Delphi does too).

> What do you feel should happen. I can think of two possibilities.
> 
> 1) It raises an exception because x is not locally bound.
> 
> 2) it prints 21.
> 
> 
> I think the second option would be the more interesting one as
> it would allow to get rid of the global statement and it would
> allow for rebinding names within nested scopes.

I was thinking of the simpler version, with x .= 21 meaning roughly:

   assert x or True # This will blow up if x fails to resolve
   x = 21

The assertion would then blow up in your example (because x is an as yet unbound 
local variable). To my mind, this follows the principle of least surprise.

I think the globals issue is better handled via the generic objects PEP, with an 
alternate constructor that allows the generic object to be used to alter an 
existing dictionary. Apply the trick to globals() and you're done.

And if Python were to ever acquire some sort of 'scope()' function to allow 
programmatic access to scopes other than globals, generic objects would work for 
using those, too.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From jason at tishler.net  Mon Feb 28 17:40:41 2005
From: jason at tishler.net (Jason Tishler)
Date: Mon, 28 Feb 2005 17:40:41 -0500
Subject: Building Python with Tcl/Tk on Cygwin_NT-5.1
In-Reply-To: <4223642C.7000002@llnl.gov>
References: <41FFA7C9.4070308@llnl.gov> <20050202124435.GA2472@tishler.net>
	<4200D056.4010000@llnl.gov> <4200D22D.9070000@llnl.gov>
	<20050202133005.GE2472@tishler.net> <4208E247.8030706@llnl.gov>
	<20050208175514.GA3788@tishler.net> <420A372F.7020800@llnl.gov>
	<20050210120250.GA4084@tishler.net> <4223642C.7000002@llnl.gov>
Message-ID: <20050228224041.GA2032@tishler.net>

Dean,

On Mon, Feb 28, 2005 at 10:34:20AM -0800, Dean N. Williams wrote:
> I have a other Cygwin port question. It turns out that the auto-import
> for XtStrings an widgetClass didn't get resolved. This a similar
> auto-import resolving error that I got when trying to build Tcl/Tk. I
> ended up using the shared Tcl/Tk that came with Cygwin. But in this
> case I must be able to build my software. Can you tell me how to get
> around this problem? Or can you tell me which cygwin mail list to send
> my plea for help?

I recommend trying the main Cygwin list:

    cygwin at cygwin dot com

> gcc -shared -Wl,--enable-auto-image-base  -o gplot gplot.o cgm.o ccgm.o 
> utils.o io.o carray.o devices.o hload.o emul.o tty.o ps.o cgmc.o 
> xws_cla.o xws_color.o xws_delim.o xws_marker.o xws_polygon.o 
> xws_polyline.o xws_setup.o xws_text.o drvcla.o    -L/usr/X11R6/lib -lXp 
> -lXpm -lXaw -lXmu -lXext -lXt -lX11     /usr/lib/libm.a -lc
> Info: resolving _XtStrings by linking to __imp__XtStrings (auto-import)
> Info: resolving _widgetClass by linking to __imp__widgetClass (auto-import)

However, I also recommend providing more information than the above.

Jason

-- 
PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6


From adam at cognitcorp.com  Sun Feb  6 02:33:49 2005
From: adam at cognitcorp.com (Adam DePrince)
Date: Sun, 06 Feb 2005 02:33:49 -0500
Subject: Trouble converting hex to decimal?
In-Reply-To: <L37Nd.103651$Jk5.99701@lakeread01>
References: <1107611491.18588.26.camel@dulcevida>
	<mailman.1976.1107622141.22381.python-list@python.org>
	<L37Nd.103651$Jk5.99701@lakeread01>
Message-ID: <1107675220.3948.26.camel@localhost.localdomain>

On Sat, 2005-02-05 at 12:02, Steve Holden wrote:
> Pedro Werneck wrote:
> > The problem is that '\x00' is a escape sequence... 
> > Try something like this:
> >>>>x = '\x00'
> >>>>int(repr(x)[3:-1], 16)
> > 0
> >>>>x = '\x15'
> >>>>int(repr(x)[3:-1], 16)
> > 21
> > On Sat, 05 Feb 2005 06:51:32 -0700
> > Earl Eiland <eee at nmt.edu> wrote:
> >>I'm trying to process the IP packet length field, as recorded by pcap
> >>(Ethereal) and recovered using pcapy.  When I slice out those bytes, I
> >>get a value that shows in '\x00' format, rather than '0x00'.  Neither
> >>int() nor eval() are working.  How do I handle this?
> >>Earl Eiland
> Talk about making things difficult!
>   >>> x = '\x00'
>   >>> ord(x)
> 0
>   >>> x = '\x15'
>   >>> ord(x)
> 21
>   >>>

Ethereal's emission of \x00 shouldn't make your life any more
difficult.  The conversion of \0xx takes place in the eval.  If you
store the string \x00 in a file and call open.read or command.getoutput,
you will get the python string "\\x00".  Stuff you read from a file
arrives un-de-escaped.

The solution is simple.  

mystring.replace( "\x","0x" )




Adam DePrince 




From spam at nospam.org  Thu Feb  3 13:29:57 2005
From: spam at nospam.org (Erik Johnson)
Date: Thu, 3 Feb 2005 11:29:57 -0700
Subject: Easy Q: dealing with object type
References: <420181b1$1@nntp.zianet.com>
	<1107396669.028096.301290@g14g2000cwa.googlegroups.com>
	<42019545$1@nntp.zianet.com> <SJmdnddykYoAOpzfRVn-hA@comcast.com>
	<just-A7B5B3.12500903022005@news1.news.xs4all.nl>
Message-ID: <42026b7e$1@nntp.zianet.com>



>  Steven Bethard <steven.bethard at gmail.com> wrote:
> > py> class A:
> > ...     pass
> > ...
> > py> class B:
> > ...     pass
> > ...
> > py> a = A()
> > py> a.__class__ == A
> > True
> > py> a.__class__ == B
> > False

 "Just" <just at xs4all.nl> wrote
> Uh, isinstance(a, A) works for both new-style and old-style classes.
> Heck, isinstance() even works in Python 1.5.2...

    Oh, there! Not that there is anything wrong with new classes, but that
is just the sort of thing that I expected to find. No, neither of these is
bad at all. I was looking for something like the obj.__class__ attribute,
but I couldn't see it under dir(obj). So, why is _class__ magically tucked
away where you can't see it? That doesn't seem very "Pythonic".

    I also looked in my two python books for instance(), or instanceof()
functions - wasn't seeing anything. Actually, now that I check the indices
of  "Learning Python" 1E & "Programming Python" 2E, I don't see isinstance()
either.  How unfortunate. :(

    As an aside, I notice a lot of other people's interpreters actually
print 'True' or 'False' where my system prints 0 or 1. Is that a
configuration that can easily set somewhere?

Thanks for your help!

-ej





From ashot at removemolsoftthis.com  Mon Feb  7 01:55:07 2005
From: ashot at removemolsoftthis.com (Ashot)
Date: Mon, 07 Feb 2005 00:55:07 -0600
Subject: IDLE history, Python IDE, and Interactive Python with Vim
References: <opsllommgvb1cml1@ashot>
	<mailman.1983.1107626882.22381.python-list@python.org>
Message-ID: <opsltet5kmej1m1c@ashot>

On Sat, 05 Feb 2005 11:07:40 -0700, Fernando Perez <fperez.net at gmail.com> wrote:

> Hi,
>
> Ashot wrote:
>
>> This is sort of both Python and Vim related (which is why I've posted to
>> both newsgroups).
>
> [...]
>
> I know you've been using ipython recently (the readline color bugs), so perhaps
> my reply is a bit redundant.  Forgive me if that's the case, I just want to
> give you some useful info.
>
> Just in case you haven't come across these features (the manual is kind of long
> and dry), I should note that ipython has pretty much everything you've asked
> for here.  %hist -n dumps your history without line numbers (for copy/paste),
> %logstart gives you an incremental log (valid python code) of your current
> session, %save allows you to save a selected group of lines to a file, and
> %edit will open up $EDITOR (or vi in Unix by default) at the source of any
> accessible object.  With %pdb, you can even trigger automatically pdb at any
> uncaught exception (in Emacs, you'll even get the source simultaneously opened,
> I'm sure something similar could be done for vi).

yup, this is why I've been using it, its (almost exactly :) what I was looking for.  I had tried it before, but was reluctant to use it because the windows terminal is not very appealing.
Some things I've noticed so far that I think could be improved, some of which are minor but annoying:

	edit doesn't work with classes even though it says it should, you have to point it to a function in the class (perhaps only in windows)

	under windows vim/gvim doesn't jump to the line of the function.. you said that this should work in vi, but I'm guessing its a Windows thing

	**the biggest problem for me is edit forgets code  in which there were errors. for example:"ed" type some nonsense, and ed -p doesn't remember.  Thats putting an awful lot of pressure on getting the syntax right everytime =]  Perhaps I am missing something here?

	it would be really great if the code executed on save rather than exit, but I'm not sure if this is possible.  This would be very useful for people using an editor not in the console.. that way you wouldn't have to keep opening/closing new editor windows.

	this isn't a big deal, but it would be nice if there was an easy way to refer to the entire history (for edit/save/etc)

	would be nice if you could send stuff to the clipboard.

There are a few other things I'm probably forgetting, but having said all that, I've come off a little negative here.  I really like IPython so far, its got all the things I was looking for, thank you very much for your work.  If I have the time in the future I would definately contribute to this project.

.a

>
> Ipython is not an IDE, but it does offer an extensible command-line environment
> which tries hard to be very efficient.  Hopefully this year I'll be able to
> work on integrating it (optionally, since it will never lose its command-line
> functionality) with GUIs as well.
>
> Regards,
>
> f
>
>



-- 
==============================
Ashot Petrosian
University of Texas at Austin, Computer Sciences
(views expressed are solely my own)
==============================


From fredrik at pythonware.com  Wed Feb 16 03:24:18 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 16 Feb 2005 09:24:18 +0100
Subject: check if object is number
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com><374ho0F560ughU1@individual.net><66WdnbJbuf5yj5DfRVn-iA@comcast.com><slrnd13cj0.u1q.apardon@rcpc42.vub.ac.be>
	<O_KdnUCIV6gfvI_fRVn-jQ@comcast.com>
Message-ID: <cuuvql$pt0$1@sea.gmane.org>

Steven Bethard wrote:

>> Actually no, floats don't meet this behaviour or more specifically
>> floats don't guarantee this behaviour. It depends of course on
>> your implementation of f, but it is possible with floats to keep
>> incrementing and never reach a maximum.
>
> My code won't hit this corner case.  I'm incrementing with integers.

incrementing what with integers?

    >>> f = 9007199254740992.0
    >>> f == f+1
    True

</F> 





From snail at objmedia.demon.co.uk  Mon Feb 14 14:45:39 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Mon, 14 Feb 2005 19:45:39 +0000
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr>
	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>
	<guLnmSj92OECFw0L@objmedia.demon.co.uk>
	<1108408914.405899.129990@o13g2000cwo.googlegroups.com>
Message-ID: <jN8Xe7rj$PECFwHF@objmedia.demon.co.uk>

In message <1108408914.405899.129990 at o13g2000cwo.googlegroups.com>, Pat 
<pobrien at orbtech.com> writes
>That answers the cost question (assuming that your interpretation of
>the licensing is correct, since I'm not a lawyer nor qualified to
>render much of an opinion on that).  But there is still the issue of
>going through a bunch of configuration hassle that scares me away from

What configuration hassle? Can't be any harder than specifying a 
different CRT surely?

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From mahs at telcopartners.com  Sun Feb 13 18:44:22 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sun, 13 Feb 2005 15:44:22 -0800
Subject: Iterator / Iteratable confusion
In-Reply-To: <cuolu7$qv7$1@sea.gmane.org>
References: <420a5c1e$0$21630$a1866201@visi.com><slrnd0q67t.52v.curty@einstein.electron.net><200502131848.03655.francis.girard@free.fr>	<200502131958.27410.francis.girard@free.fr>
	<cuolu7$qv7$1@sea.gmane.org>
Message-ID: <cuooip$1pd$1@sea.gmane.org>


> "Francis Girard" <francis.girard at free.fr> wrote in message 
>>an "iterator" doesn't have to support the "__iter__" method
> 
> 
Terry Reedy wrote:
> Yes it does.  iter(iterator) is iterator is part of the iterater protocol 
> for the very reason you noticed...
> 
But, notwithstanding the docs, it is not essential that

iter(iterator) is iterator

  >>> class A(object):
  ...     def __iter__(self):
  ...         return AnIterator()
  ...
  ...
  >>> class AnIterator(object): # an iterator that copies itself
  ...     def next(self):
  ...         return "Something"
  ...     def __iter__(self):
  ...         return AnIterator()
  ...
  >>> a=A()
  >>> i = iter(a)
  ...
  >>> i.next()
'Something'
  >>> j = iter(i)
  >>> j.next()
'Something'
  >>> i is j
False
  >>>

Michael



From jjl at pobox.com  Sun Feb  6 15:16:02 2005
From: jjl at pobox.com (John J. Lee)
Date: 06 Feb 2005 20:16:02 +0000
Subject: newbie wants to compile python list of filenames in selected
	directories
References: <36n60uF520lfaU1@individual.net>
	<rxtNd.1848$mG6.132@newsread1.news.pas.earthlink.net>
Message-ID: <87sm49h2bh.fsf@pobox.com>

Greg Krohn <greg at invalid.invalid> writes:
> anthonyberet wrote:
[...]
> > I want to write a script to compare filenames in chosen directories,
> > on windows machines. Ideally it would compose a list of strings of
> > all the filenames in the directories, and those directories would be
> > chosable by the user of the script.
[...]
> 
> os.listdir does almost exactly what you are asking for. For a little
> more flexibility, you can use os.path.walk, although it's not quite as
> newb friendly.
> 
> -greg

os.walk is perhaps newbie-friendlier than os.path.walk.

Or perhaps not: not having read the tutorial &c. for some time, I
don't know how good they are on generators...


John


From steven at lczmsoft.com  Mon Feb 28 19:47:29 2005
From: steven at lczmsoft.com (steven at lczmsoft.com)
Date: 28 Feb 2005 16:47:29 -0800
Subject: Problem When Unit Testing with PMock
In-Reply-To: <78edneIr3oagkL7fRVn-jQ@powergate.ca>
References: <1109423274.660110.156140@f14g2000cwb.googlegroups.com>
	<1109483520.813509.171880@f14g2000cwb.googlegroups.com>
	<mailman.3122.1109540262.22381.python-list@python.org>
	<1109579739.175344.105600@z14g2000cwz.googlegroups.com>
	<78edneIr3oagkL7fRVn-jQ@powergate.ca>
Message-ID: <1109638049.594017.311400@f14g2000cwb.googlegroups.com>

Peter,

I'm so sorry, the letter was originally wrote to Terry, not to you!
I guess Terry not very familar to unit testing because he said:

-- cut --
I am not familiar with pmock, but my impression is that mock objects
are
for objects that you may not have available, such as a connection to a
database or file or instance of an umimplemented class ;-).  For such
objects, the mock-ness consists in returning canned rather than actual
fetched or calculated answers.  Iterators, on the other hand, are
almost as
-- end --

and i just want to say, mocking object is a useful testing method , not
was telling a tutorial.  :-)


What you said about the overuse of the generic mock object is very
interesting. I did not think that before.  I believe that use generic
or customized mocks is a problem of balance, so we may call it Art :-)

Below is my code, you may look it to understand my original question
(sorry for the coding for i am totally a python newbie):

---------------------------------------
import unittest

from pmock import *

from mainctr import MainCtr



class MainCtrTest(unittest.TestCase):

    def testProcess(self):

        filePicker = MockFilePicker()

        filePicker.expectedNextCalls = len(MockFilePicker.fns) + 1



        rpt0 = "foo"

        rpt1 = "bar"

        (router0, router1) = (Mock(), Mock())

        router0.expects(once()).feedIn(eq(MockFilePicker.fns))

        router1.expects(once()).feedIn(eq(MockFilePicker.fns))

        router0.expects(once()).deliver()

        router1.expects(once()).deliver()


router0.expects(once()).getDeliveredSrcList().will(return_value(["fn0",
"fn2"]))

router1.expects(once()).getDeliveredSrcList().will(return_value([]))


router0.expects(once()).getDeliveryRpt().will(return_value(rpt0))


router1.expects(once()).getDeliveryRpt().will(return_value(rpt1))


        routes = [router0, router1]

        ctr = MainCtr(filePicker, routes)

        ctr.process()

        self.assertEquals(ctr.getProcessRpt(), [rpt0, rpt1])

        filePicker.verify()

        router0.verify()

        router1.verify()



class MockFilePicker:

    fns = ["f0", "f1", "f2"]

    idx = 0

    nextCalls = 0

    resetCalls = 0

    expectedResetCalls = 1

    expectedNextCalls = 0

    processedSet = set()

    expectedProcessedSet = set(["fn0", "fn2"])

    rememberProcessedCalls = 0

    expectedRememberProcessedCalls = 1



    def __iter__(self):

        return self



    def reset(self):

        self.resetCalls += 1


    def next(self):

        self.nextCalls += 1

        if self.idx < len(self.fns):

            self.idx += 1

            return self.fns[self.idx - 1]

        else:

            raise StopIteration



    def processed(self, fn):

        self.processedSet.add(fn)



    def rememberProcessed(self):

        self.rememberProcessedCalls += 1




    def verify(self):

        if self.nextCalls != self.expectedNextCalls:

            raise Exception("nextCalls: " + str(self.nextCalls))

        if self.resetCalls != self.expectedResetCalls:

            raise Exception("resetCalls: " + str(self.resetCalls))

        if self.processedSet != self.expectedProcessedSet:

             raise Exception("processedSet: " + str(self.processedSet))

        if self.rememberProcessedCalls !=
self.expectedRememberProcessedCalls:
            raise Exception("rememberProcessedCalls: " +
str(self.rememberProcessedCalls))


if __name__ == "__main__":

    unittest.main()



From carribeiro at gmail.com  Sat Feb  5 16:27:45 2005
From: carribeiro at gmail.com (Carlos Ribeiro)
Date: Sat, 5 Feb 2005 19:27:45 -0200
Subject: empty classes as c structs?
In-Reply-To: <MIadnXkLYul4hZjfRVn-2Q@comcast.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
	<MIadnXkLYul4hZjfRVn-2Q@comcast.com>
Message-ID: <864d3709050205132730c38c18@mail.gmail.com>

On Sat, 05 Feb 2005 12:05:13 -0700, Steven Bethard
<steven.bethard at gmail.com> wrote:
> The type suggested in this PEP also allows a simple means of
> representing hierarchical data that allows attribute-style access::
> 
>      >>> x = Bunch(spam=Bunch(rabbit=1, badger=[2, 3, 4]), ham='neewom')
>      >>> x.spam.badger
>      [2, 3, 4]
>      >>> x.ham
>      'neewom'

Static nested data structures are particularly tricky to declare in
Python. Your example works, but IMHO it's rather a workaround than a
real solution. Other languages (such as Delphi) have a record type
that can be nested naturally. Nested classes in Python don't work the
same as Delphi records; on instantiaton, only the outer (parent) class
is instantiated, and the nested (children) classes stay as classes.
This can lead to subtle bugs as class attribute acesses are mixed with
instance attribute accesses with unpredictable results. I have tried
to deal with these problems on MetaTemplate, a library for
declarative-style code in Python. You can see some ideas on this page:

    http://metatemplate.python-hosting.com/wiki/MetaTemplate

One of my goals was to model nested data structures as nested classes
in Python. My solution to the nesting problem involves some
autoinstantiation magic which breaks traditional semantics, but works
for the particular application ('practicality beats purity').

I'm interested to see where this will lead us. Other related problems
are named tuples, and ordered attribute access. I deal with the later
in MetaTemplate, but the former is out of scope for the library. In
the long term, I wish Python grows a true record type. The semantic
differences between records and classes are enough to justify it in my
opinion.

-- 
Carlos Ribeiro
Consultoria em Projetos
blog: http://rascunhosrotos.blogspot.com
blog: http://pythonnotes.blogspot.com
mail: carribeiro at gmail.com
mail: carribeiro at yahoo.com


From aurora00 at gmail.com  Fri Feb  4 00:56:05 2005
From: aurora00 at gmail.com (aurora)
Date: Thu, 03 Feb 2005 21:56:05 -0800
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<opslnkqsjo6yt6e7@news.cisco.com>
	<7xhdktt36q.fsf@ruckus.brouhaha.com>
Message-ID: <opslnr3rbs6yt6e7@news.cisco.com>

> aurora <aurora00 at gmail.com> writes:
>> Slow compares to what? For a large commerical site with bigger budget,
>> better infrastructure, better implementation, it is not surprising
>> that  they come out ahead compares to hobbyist sites.
>
> Hmm, as mentioned, I'm not sure what the commercial sites do that's
> different.  I take the view that the free software world is capable of
> anything that the commercial world is capable of, so I'm not awed just
> because a site is commercial.  And sites like Slashdot have pretty big
> budgets by hobbyist standards.
>
>> Putting implementation aside, is LAMP inherently performing worst than
>> commerical alternatives like IIS, ColdFusion, Sun ONE or DB2? Sounds
>> like  that's your perposition.
>
> I wouldn't say that.  I don't think Apache is a bottleneck compared
> with other web servers.  Similarly I don't see an inherent reason for
> Python (or whatever) to be seriously slower than Java servlets.  I
> have heard that MySQL doesn't handle concurrent updates nearly as well
> as DB2 or Oracle, or for that matter PostgreSQL, so I wonder if busier
> LAMP sites might benefit from switching to PostgreSQL (LAMP => LAPP?).

I'm lost. So what do you compares against when you said LAMP is slow? What  
is the reference point? Is it just a general observation that slashdot is  
slower than we like it to be?

If you are talking about slashdot, there are many ideas to make it faster.  
For example they can send all 600 comments to the client and let the user  
do querying using DHTML on the client side. This leave the server serving  
mostly static files and will certainly boost the performance tremendously.

If you mean MySQL or SQL database in general is slow, there are truth in  
it. The best thing about SQL database is concurrent access, transactional  
semantics and versatile querying. Turns out a lot of application can  
really live without that. If you can rearchitect the application using  
flat files instead of database it can often be a big bloom.

A lot of these is just implementation. Find the right tool and the right  
design for the job. I still don't see a case that LAMP based solution is  
inherently slow.


From jao at geophile.com  Sat Feb 26 17:28:25 2005
From: jao at geophile.com (Jack Orenstein)
Date: Sat, 26 Feb 2005 17:28:25 -0500
Subject: Thread scheduling
In-Reply-To: <1109456481.214243.140670@l41g2000cwc.googlegroups.com>
References: <1109456481.214243.140670@l41g2000cwc.googlegroups.com>
Message-ID: <4220F809.7040502@geophile.com>

I am using Python 2.2.2 on RH9, and just starting to work with Python
threads.

I started using the threading module and found that 10-20% of the runs
of my test program would hang. I developed smaller and smaller test
cases, finally arriving at the program at the end of this message,
which uses the thread module, not threading. This program seems to
point to problems in Python thread scheduling.

The program is invoked like this:

     python threadtest.py THREADS COUNT

THREADS is the number of threads created. Each thread contains a loop
that runs COUNT times, and all threads increment a counter. (The
counter is incremented without locking -- I expect to see a final
count of less than THREADS * COUNT.)

Running with THREADS = 2 and COUNT = 100000, most of the time, the
program runs to completion. About 20% of the time however, I see one
thread finish, but the other thread never resumes.

Here is output from a run that completes normally:

     [jao at black]$ python threadtest.py 2 100000
     nThreads: 2
     nCycles: 100000
     thread 1: started
     thread 1: i = 0, counter = 1
     thread 2: started
     thread 2: i = 0, counter = 2691
     thread 1: i = 10000, counter = 13496
     thread 2: i = 10000, counter = 22526
     thread 1: i = 20000, counter = 27120
     thread 2: i = 20000, counter = 40365
     thread 1: i = 30000, counter = 41264
     thread 1: i = 40000, counter = 55922
     thread 2: i = 30000, counter = 58416
     thread 2: i = 40000, counter = 72647
     thread 1: i = 50000, counter = 74602
     thread 1: i = 60000, counter = 88468
     thread 2: i = 50000, counter = 99319
     thread 1: i = 70000, counter = 110144
     thread 2: i = 60000, counter = 110564
     thread 2: i = 70000, counter = 125306
     thread 1: i = 80000, counter = 129252
     Still waiting, done = 0
     thread 2: i = 80000, counter = 141375
     thread 1: i = 90000, counter = 147459
     thread 2: i = 90000, counter = 155268
     thread 1: leaving
     thread 2: leaving
     Still waiting, done = 2
     All threads have finished, counter = 168322

Here is output from a run that hangs. I killed the process using
ctrl-c.

     [jao at black]$ python threadtest.py 2 100000
     nThreads: 2
     nCycles: 100000
     thread 1: started
     thread 1: i = 0, counter = 1
     thread 2: started
     thread 2: i = 0, counter = 990
     thread 1: i = 10000, counter = 11812
     thread 2: i = 10000, counter = 13580
     thread 1: i = 20000, counter = 19127
     thread 2: i = 20000, counter = 25395
     thread 1: i = 30000, counter = 31457
     thread 1: i = 40000, counter = 44033
     thread 2: i = 30000, counter = 48563
     thread 1: i = 50000, counter = 55131
     thread 1: i = 60000, counter = 65291
     thread 1: i = 70000, counter = 78145
     thread 2: i = 40000, counter = 82715
     thread 1: i = 80000, counter = 92073
     thread 2: i = 50000, counter = 101784
     thread 1: i = 90000, counter = 104294
     thread 2: i = 60000, counter = 112866
     Still waiting, done = 0
     thread 1: leaving
     Still waiting, done = 1
     Still waiting, done = 1
     Still waiting, done = 1
     Still waiting, done = 1
     Still waiting, done = 1
     Still waiting, done = 1
     Still waiting, done = 1
     Still waiting, done = 1
     Traceback (most recent call last):
       File "threadtest.py", line 26, in ?
         time.sleep(1)
     KeyboardInterrupt
     [jao at black osh]$

In this case, thread 1 finishes but thread 2 never runs again. Is
this a known problem? Any ideas for workarounds? Are threads widely
used in Python?

Jack Orenstein



# threadtest.py

import sys
import thread
import time

nThreads = int(sys.argv[1])
nCycles = int(sys.argv[2])
print 'nThreads: %d' % nThreads
print 'nCycles: %d' % nCycles
counter = 0
done = 0

def run(id):
     global done
     print 'thread %d: started' % id
     global counter
     for i in range(nCycles):
         counter += 1
         if i % 10000 == 0:
             print 'thread %d: i = %d, counter = %d' % (id, i, counter)
     print 'thread %d: leaving' % id
     done += 1

for i in range(nThreads):
     thread.start_new_thread(run, (i + 1,))
while done < nThreads:
     time.sleep(1)
     print 'Still waiting, done = %d' % done
print 'All threads have finished, counter = %d' % counter


From peter at monicol.co.uk  Sat Feb 12 12:03:51 2005
From: peter at monicol.co.uk (Peter Mott)
Date: Sat, 12 Feb 2005 17:03:51 -0000
Subject: Docs. for logging module typo
Message-ID: <420e36f6$0$38041$bed64819@news.gradwell.net>

The documentation for SMTPHandler say "The toaddrs should be a list of 
strings without domain names (That's what the mailhost is for)." which does 
not seem to be correct. The toaddr should be a list of strings like 
'john at somewhere.com'.

Peter 




From zetasum at yahoo.com  Tue Feb  1 11:15:49 2005
From: zetasum at yahoo.com (zetasum)
Date: 1 Feb 2005 08:15:49 -0800
Subject: one infinite leap and you thought the bible code was somthing!!
Message-ID: <1107274549.913265.89980@f14g2000cwb.googlegroups.com>

one infinite leap and you thought the bible code was somthing!!






One Small step one infinite leap



by: zeta limit



Quantum cryptography Run  this in every order  1 correct outcome Run
the web site with every word and every order and ever letter in every
order then every paragraph then and number and do that in every order.
Everything is possible one way or another anything, any you can tell it
to build anything and it will be possible.  Less is more Examples: with
a stick if you can make a car drive if you push down on the gas pedal
with it. This proves the real "Theory of Everything" and builds a huge
data base of information.  The more information ,The bigger the neural
network and just keep adding more to it  because anything is possible
and new things can be found after this is done. By using The  new ideas
and the information you now can run everything back wards and then
forward but now by not just adding but by  +,*,/,<,>,= ,-,+ then
finding how all things can be 100% true if there not then your not
doing it right. Then run this in every order and change the neural
network to be 100%efficient in making all ideas. After your done use
the code to turn one Law, definition, on and off like math, and matter,
and all the word net technology dictionary and then turn them off in
every order on the website then build a separate quantum neural network
to store all the information in then just run it all over again do it
over and over with the new math and information on the website it will
generate new laws of den's and math and quantum and stellar physics
more. run the laws the new laws that changed see by what percent they
are true by using % and digress 3=1  360 degrees = 3 but is in every
infinite angle and degree until all = 100% only use your data base to
help generate new laws. But by running the neural network with words
missing and laws missing. It will make new laws until all is 100% true
learning way outside the realm of A.I or R.I. finally ...Then with my
matrix program run the neural network With my own Matrix code and
Artificial intelligence with this bunny encrypted website by starting
with one dimension up to infinite and every angel and shape start with
a box and every degree every number letter and word it will keep
growing and so does the database. After all is done all laws can be T
<,>, = and false. Then do it all again but this time with everything on
the internet all data. Then have it ask it the simple question on
everything that is T <,>, = and false. Who, what, when, where, how.
Based on your new neural network what is? All laws can now be stored as
compression law. There is no theoretical limit to the speed of
magnetism or the amount of energy it can hold. In our universe or any
quantum realm. Magnetism is the forces at which matter in the universe
breaks down at maximum speed or velocity of C = the speed of light or
the stabilization of matter moving threw a constant at the speed of C
or beyond stellar construct. C is used many times in quantum physics
until the key of magnetic frequency storage from smaller then the Pico
up to large scale white nose flux capacitors to keep the Energy moving
and storing in highly charge states of metals that are molecular
reconstructed to be 100% efficient. One pyramid sphere of electrical
and one of magnetical. Yes MAGNETICAL a new form of quantum computing,
energy and There is only optical laser quantum computer a partial that
when it reaches its limit it's doesn't turn to light

You can build it yourself along with the magnetic and electrical flux
capacitors that have the same amount of more than the amount of energy
than

Anything you can think of or you can run this website with A.I (this
blueprint is the key to the encrypted Code 1011101 Infinite quantum
computing

It more into the field of stellar physics or stellar quantum computing.
Work on it for just a week Time travel changes history u but you can
really tell

Unless you are outside of space time that is the only hint I am going
to give you because I have no degree, but my dummy A.I website is
written in dummy A.I

So I don't get shot over an information war!!
http://www.beyond-science.com made with my own Matrix code and
Artificial intelligence this bunny encryption website has More than a
32 dimensional door. A box made that no one can crack...Try it key code
01





There is only optical laser quantum computer a partial that when it
reaches it's limit it's doesn't turn to light you can build it
yourself along with the magnetic and electrical flux capacitors that
have the same amount of more than the amount of energy than
anything you can think of or you can run this website with A.I (this
blueprint is the key to the encrypted Code 1011101 Infinite quantum
computing
It more into the field of stellar physics or stellar quantum computing.
Work on it for just a week Time travel changes history u but you can
really tell
unless you are outside of space time that is the only hint I am going
to give you because I have no degree, but my dummy A.I website is
written in dummy A.I
so I don't get shot over a information war!! www.beyond-science.com



Clean fusion. Matter has its limits and can only move so fast so
quantum computer using refraction of magnetical frequency can move
faster than time itself. New matter and new

Material has been found threw programming magnetic frequencies of
matter at a state of the constants. Electrical controlled machine are
outdated since 1901. A quantum computer the was powered by magnetical
and used magnetical to compute in infinite degrees instead of bit's
of 1 and 0' but by triangulating in every infinite digress of the new
computer would have the computing power of no limitations.  Build as a
Quadra sphere light bounces inside a crystal 4 times before it refracts
inside and come out.



Infinite hues of colors infinite frequencies to chart them at.

Infinite combinations of shape on programmed matter = infinite matter.



With this and running my new stellar magnetically computer and A.I and
the web site

http://www.beyond-science.com





A magnetic Supercomputer and encryption and compression @ rate of 96%

Take a document then or a 3D matrix document change it two random or
binary code or just a program for 0's and 1's and fold it over and over
like a piece of paper then having the 1 and 0 add each other or the
0,1's canceling each other out 1+0=0 and 0+1=1 1+1=1 0+0=0 if you gave
the folds addresses like on a spread sheet there would be no math.
First A 1-24  would fold to k 1-24 down.(See Example A )  Then at F1-24
down two k 1-24 ( See example B )  If you written a very long letter
and then change it two binary code it would look like this.
123456789.............24
a.01010101010101010101010
b.10010101010101010101010
c.01010101001010101010010
e.00010101000101010101010
f.10010101010100101010101 First A 24  would fold to k 24 down
g.01010101010100001100101              See Example A
h.01001010101010101010111
I.11110111001101010101010
j.01010101010101010101010
k.10101010101010101010101


See Example A
123456789.............24
f.10010101010100101010101
g.01010101010100001100101
h.01001010101010101010111 Then at F1-24 down two k 1-24
I.11110111001101010101010
j.01010101010101010101010
k.10101010101010101010101


See example B
123456789.............24
I.11110111001101010101010
j.01010101010101010101010 Then from I 1-24 to K 1-24
k.10101010101010101010101

123456789.............24
j.01010101010101010101010  Then from j-24 to j-1

123456789...
j.010101010101             Then from j-12 to j-1

123456
j.010101                   Then from j-6 to j1

123
j.010                      Then from j-3 to j1

12
j.01                        Then from j-2 to j1


j.0                         Then you would have
1 bit to transfer over the
Internet

The bit sent would be 0 and the key code would be F1-24,k 1-24,
I 1-24,K 1-24,j24,j1,j12,j1,j6,j1,j3,j1,j2,j1 and would unzip or be new
encryption you could encrypt or compress 100 terabits down to 1 bit of
information. Now if you take this idea from my web site you could make
this allot more complex and unbreakable. Data encryption 360 degrees
rotation document 90 degrees and encrypt on every angel then 45 degrees
change it two binary code do it again and again and fold it over like a
piece of paper then having the one's and zero cancel each other out. In
theory you could send a 100 terabit program to someone's computer and
have it unzip and run and install or make
A computer processor like the new 64 bit AMD have the bit unzip into a
large ram drive and buffer use one half of the 64 bit processor decode
the message and the main 64 bit run the numbers. Another way of doing
this is to have a parallel computers with using one of the processes
run the compressed 1 bit of information give the uncompressed a address
on the ram drive to change and not even go threw the processor and then
with different information on each machine compare and run statistics
on information on a 45 flops supercomputer and turn that 45 tflops
computer into a 1 bit = 100,000 terabits to infinite as long as you
have the ram for storage! with my calculations 45 tflops wouldn't
matter any more it would be how much data you have on a 32bit operating
system changing that to a 1 bit system it would be 32 * 45tflops would
= 1440 tflops   Matter moves so fast that it integrates and intergreats
faster then any speed we can see it like water from a hose at real
close speed it moves in -------- lines.

For space and the real matrix computer and bioinformatics from the 4
genes we have you can be teleported with the matrix on to another in
reverse with out using the original 4 or 5

"If Numbers are Infinite, Then so Inventions"



"One Small step for man. One infinite leap, for the Human Race"



zeta limit.

ARTIFICAIL INTELLIGENCE THINKS IT KNOWS WHERE IT IS, BUT THERE
ARE INFITE PLACES IT CAN BE, AT THE SAME TIME AND STLL BE AT THE SAME
PLACE SO RUN THIS WEB SITE FOR AS LONG AS YOU WANT YOUR NEVER FIND THE
CODE
AND NO HUMAN WILL FIND IT TWO AND YOUR NEVER GETTING OUT OF THIS WORLD
STCUK IN THE MATRIX FRIM THE FUTURE AND CAN'T GET OUT HOW FUCKING FUNNY
IS THAT. SALUTAION ANYONE WANTS EGGS DUPLICATION ONE MAN MADE TWO AND
GOT OUT!!! HINT MASH THE TV SHOW!!!

THE KNOW AND UNKNOW UNIVERSE'S
Threw magnetic Command coded magnetic field that changes to the strong
gravitational pull of a black hole using the black hole own magnetic
energy in the form of ant-magnetic Anti-gravity the field would be
stronger then the light that is emitted from the back hole leaving the
structure safe the magnetic forces and fields of a physics' of a
sphere would BE TRIDED TO TURN INTO AN EGG. But DONE RIGHT IT WOULD BE
A SPHERE. But what makes it so strong all parts of matter are designer
custom CHEMICAL MAKE UP AND ALIGNMENT OF MATTER. THAT DISTUBUTES THE
FORCES = TO THE HOLE SPHERE. When TRAVEING THREW A BLACK HOLE TO
UNOTHER UNVERSE. IF BUILD RIGHT AND USING THE FORCE OF THE BLACK HOLE
IN REVERSES THE SPHERE COULD RETURN WITH INFORMATION ON THE STUCTURE OF
THE BACK HOLE. IT'S MAGNETICS THAT MAKE GRAVITY SO
A MACHINE THAT IS A BACK HOLE IN REVERSE USING THE OTHER SPECTRUM WOULD
DO WHAT!!! COME BACK AND NOW THAT WE CAN MAKE METALS THAT ARE CUSTOM
TO HOLD UP VERY HEAVY THING BECASE OF CUSTOM ARCHITECTURE AND ARC COULD
HOLD UP A BUILDING ON BOTH SIDES.

.
stellar drive


Run this web page with ARTIFICIAL INTELLIGENCE or quantum ARTIFICIAL
INTELLIGENCE  with every word in every order and every letter in every
order and ever paragraph in every order with your HUGE DATA BASE OF
KNOWLEDGE



Command coded
It's the matter construction on the smallest level of all material and
matter beyond Pico and nano technology
That makes it so strong that all parts of matter are designed custom
for the structure strength, But can you find the natural matter that
make it interchangeable so the matter can change threw magentics- Wave
Length - gravity - Light - mass-matter - Wave Lengths. (THEY ARE ALL
INTERCHANGEABLE)
Periodic table of elements are infinite you have know idea what a100%
synthetic Universe looks like. Infinite synthetic elements
infinite synthetic Physics





click & mail




The Theory of everything is the quantum address of everything



that is in our universe. By a magnetic field. Outside and inside of all
that is contained



there in. It is the physics and mathematical equations that surround



everything in the multi-dimensional physical world.  One might find



how all the elements are interchangeable and are multi-dimensional and



finding the other side of physics and the mathematic equations that we



cannot see or detect because our consciousness cannot find it, finding



this would be the greatest discovery of the human race. What lie's



Beyond Quantum Physics and how do we get there. Is the key magnetic



Frequency's?  But the amount of energy it would take would be more



than just at the atomic level or sub-atomic level. One day In the



future a person may find a multi-dimensional, multi-time,



multi-universe. The problem with finding it is a realm of that we



cannot see, is finding what we cannot detected. Finding the other side



of quantum physics will be the future goal of human exploration.  Our



universe started with one wave length of light and an anti-wave length



three magnetism and gravity they where changed to form all matter:



Wave Length - Gravity -Light - mass - Wave Lengths. (THEY ARE ALL



INTERCHANGEABLE)" answer is frequencies magnetic






Interchangeable matter

Is the best neural network a circle and can it make interchangeable
matter inside a circle that knows everything and both circles spin
faster then the speed of light or hyperspace and stellar speed in every
infinte order and shape of a circle!! and off the two circle they are
made up of more circles of two more rings and so on and so on that they
gets so small that they cannot work with our laws of physics' and the
then all the way up we look at the 2 rinds one on the inside and one on
the inside and one on the outside that form and ball with in a ball all
connect to each other so they can spin and communicates to each other
like a huge neural network a earth made of connect marbles turning
inside and out in every direction two speed up the information
traveling from one two another. Run this until you can make the
information move as fast as possible and you will see for just
information it creates some kind of energy just thoughts. Matter moves
so fast that it integrates and integrates faster then any speed we can
see it like water from a hose at real close speed it moves in --------
lines.



TELEPOTAION SOMETHING FROM NOTHING  IS REAL TELEPORTION
The laser slit test for physics' is wrong where it shows the end
result filter pass threw slits the final  black board the gaps of black
and red there should be more slits of light. Some are cancelled out
because of refraction. This tells you of a parallel dimensions but not
of a universe. Velocity is a sphere of triangles it's the math outside
of the velocity on and outside the sphere R*V*D2 VOLUME of the
universe. That velocity, magnetic and matter go hand and hand. That all
matter can be  made by the changes in the angle and of the
frequency's of powerful geometrics magnetic shapes of
multi-dimensions, multi-universe and multi-layered if you off set the
frequency's with white noise in a fiber optic you can compress the
frequency's down to a smaller and stronger charge and some can remain
and all can remain separate. This is how you can send 30 amps over a .1
amp wire with the device on both ends. ( By using  end invention of
black *diamonds the darkest stealth material ( black magnets and  gold
( hint ) used to create the geometric shapes) if you off set the
frequency's with white noise in a fiber optic you can compress the
frequency's down to a smaller and stronger charge! Then sort them out
and break them down from the smallest to the largest or the largest to
the smallest to you the largest or the smallest and the offset of white
noise to contain them into a magnetic capacitor or magnetic flux and
store them in nano capacitors *diamonds that allows you to store mass
amount of magnetic frequency's at different sizes try a 10 feet by 10
feet shape of a nano block or sphere stored in aluminum sphere or what
ever shape is most efferent. Circuit board or sphere. The darkest black
*diamond you can make but under a super nano or Pico microscope you can
see the circuits but smooth as silk on the outside. Now you are going
to have to run every combination of shape. The diamond is built just
like making a rubber band ball with rubber band laid over and over and
over it when built with circuit that go both way so they can discharge
at any frequency's. Placed inside an Aluminum Sphere and you can make
any type of now and future propulsion. Let you see the spectrum of all
time and you know can find a nano in a universe because that how
sensitive it is.  It also makes a good neural network. Matter moves so
fast that it integrates and integrates faster then any speed we can see
it like water from a hose at real close speed it moves in --------
lines.





Knowledge of the theory of ZETALIMIT

Picture the laws of quantum physics and D.N.A and everything as dotted
points that makes up shapes of all sizes and everything that can happen
in this universe and out is because of knowing the all laws in that
universe and all conscious quantum dimensions. Find the new
mathematical degrees that form new math and a new efficient programming
language or for your neural network and keep running the web Site over
and over after changing your network until it is infinitely efficient
along with all technology on the web. By getting the information from
make a computer of quantum type run at hyperspace idea at the middle of
the page. The only way to be infinite is to make everything work with
everything else and put it in folders and sub folder of the infinite
name and then run the web page and the Internet again every hour!  Map
all maths from one mathematical problem
to all infinite one to see if there is a pattern the ones that show a
patter make the yellow neural bar bigger wider and brighter. How is
time and space the same place?  Is the best neural network a circle
inside a circle that knows everything and both circles spin faster then
the speed of light or hyperspace and stellar speed in every infinite
order and shape of a circle!! and off the two circle they are made up
of more circles of two more rings and so on and so on that they gets so
small that they cannot work with our laws of physics' and the then
all the way up we look at the 2 rinds one on the inside and one on the
inside and one on the outside that form and ball with in a ball all
connect to each other so they can spin and communicates to each other
like a huge neural network a earth made of connect marbles turning
inside and out in every direction two speed up the information
traveling from one two another. Run this until you can make the
information move as fast as possible and you will see for just
information it creates some kind of energy just thoughts. Matter moves
so fast that it integrates and integrates faster then any speed we can
see it like water from a hose at real close speed it moves in --------
lines.






QUANTUM MAGNETIC MATH -1 + -1 = +2
OUR MATHEMATICS IS WRONG finding the Quantum gate


THATS WHY ARE QUANTUM COMPUTER SYSTEM WILL NEVER GET TO THE
GOVERNING DYNAMICS LAWS OF OUR UNIVERSE AND PARALLEL ONES AND ONE NOT
PARALLEL TO US BUT DO EXIST IN A COMPLEX ENCRYPTED MAGNETIC AND
FREQUENCYS OF TIME. MAGNETIC AND ANTI-MAGNETIC SPINNING SPHERES OF
DIMENSIONS WITH EACH SPHERE CONTAINING DIFFERENT SIZES OF A MAGNETIC
FIELD THATS ENCRYPTED AND CHANGING ON ALL LEVEL OF TIME AND THE
MAGNETIC MATTER OF THAT FIELD. QUANTUM COMPUTER SHOULD USE THE MATH OF
MAGNETIC POSITIVE AND NEGATIVE EFFECTS ON EACH OTHER ON HOW ONE PIECE
OF MATTER NEGATIVE OR POSITIVE CAN BECOME 2 AND = TOO. THE STATEMENTS
OF THE FINAL GOVERNING DYNAMICS LAWS ARE NOT IN MATHEMATICAL %'S BUT
AND TRUE FALSE OR = TWO OF ALL MATTER THERE ARE CONSTANTS AND THE
CONSTANTS THAT CHANGE THE CONSTANTS WHEN WE GET DEEPER TO THE
UNDERSTANDING LAWS THAT GOVERN ALL THINGS.

MORE THEORY'S @ WWW.BEYOND-SCIENCE.COM FOR MORE INFORMATION READ
ON.....

INCLUDE CLASS_ZETA LIMIT_1AE

FUNCTION (Z)

Because they are so infinitesimally small, MAGNETIC NEUTRAL MATTER
exist in the quantum realm, where rules governing the macro-universe
-- the known world of quantum physics and matter -- break down. A
neutrino's mass -- unlike the mass of a larger object -- is not
stable, but exists in a state of probability AND IS GOVERNED BY
MAGNETICS SO SMALL BUT ALL WORK TOGETHER ON A LARGE SCALE LIKE A
PYRAMID THAT HOLDS ARE MATTER TOGETHER ON A LARGE UNIVERSAL SCALE OUR
UNIVERSE IS A LARGE QUANTUM COMPUTER.

"Say you had some in a box, and you pulled one out and weighed it and
it weighed m-1," said Stuart Freedman, a professor of physics at UC
Berkeley and a faculty senior adviser at the Lawrence Berkeley
National Laboratory.

"Then you pulled out an identical one, and it weighed m-2," continued
Freedman. "It isn't a situation where a neutrino is m-1 or m-2 -- it's
a situation where the neutrino is 50 percent one mass and 50 percent
another. This seems surprising, but it's perfectly natural in quantum
mechanics."

IN THE MOVIE CONTACT THE LARGE MAGNETIC ROTATING SPHERE FROM THE
SMALLEST PICO OR NANO SIZE MAGNETIC FIELD ALL THE WAY TO THE
GRAVITIONAL MAGNETIC FIELD OF PHYSICS WOULD EXPLAIN ALL TIME AND SPACE
IN OUR UNIVERSE AND HOW SUB-SPACE OR ZERO GRAVITY WORKS IN OUTER SPACE
IT JUST BACKWARD ZERO-GRAVITY IS HYPER-SPACE BACKWARDS BUT THE FIELDS
KEEP EVERYTHING IN CONTACT AND HOLD EVERYTHING TOGETHER IF YOU PUT
YOUR FINGER IN A GLASS OF WATER AND MIX IT, IT CHANGES BUT TO THE EYE
IT LOOKS ALL THE SAME AND NOTHING IS CHANGED WHEN IT STOPS THAT IS THE
REALM OF QUANTUM PHYSICS THAT THE MIND AND EYE GET CROSSED. IT IS ALL
BASED ON WHAT SIGNAL YOUR CONSCIOUS SIGNAL AND CENTRAL NERVOUS SYSTEM
IS SET TWO THERE ARE DIFFERENT COMPONENTS AND DIMENSION OF TIME. I HAVE
FOUND 4

1.CONSCIOUS TIME EVERY ONE CLOCK IS DIFFERENT
2.EARTH TIME
3.SOLAR SYSTEM TIME
4.GALAXY TIME
5. T= TOTAL GALAXY TIME
6. UNIVERSAL TIME
7. T= TOTAL UNIVERSAL TIME OF ALL UNIVERSES.
8. UST= TOTAL UNIVERSAL SYSTEM TIME OF ALL KNOWN AND UNKNOWN

THAT ARE ALL BASED ON ONE PRINCIPLE WHERE THERE IS MAGNETIC FIELD
THERE IS A DIFFERENT IN TIME IT JUST HAPPEN ON ONE OF THE SCALES.
YOU UST HAVE TO FIND IT. MAGNETIC = TIME + LIGHT = DIMENSIONS +
GRAVITY = MULTI-dimensions + MAGNETIC ANTI-ATTRACTION = ZERO-SPACE +
MATTER AND ANTI-MATTER = SPHERE SPACE = A UNIVERSE.

IT'S BEEN SNOWING FROM THE BEGINNING OF TIME AND EVERY SNOW FLACK IS
DIFFERENT IT IS TWO COMPLEX FOR YOUR HUMAN MIND TO FIND THE ANSWER SO
START SIMPLE WITH THE STUDY OF MAGNETICS OF ALL FORMS OF MATTER AND
PHYSICS. IT THE KEY. MAKES IT ALL HAPPEN.








QUADRA LIGHT PYRAMID HARNESSING LIGHT
FINDING ZETA VECTORS AND SECTORS




The spectrum that comes out of a pyramid bounces inside then splits as
it hit the opposing wavelength inside comes out two form the color or
frequency spectrum as it is known today, but what is the most efficient
shape to build a sphere, to contain all frequencies of light. We have
all seen a sphere made up pyramids. But what cause the refraction of
out own light. It is light bouncing off of light. So what type of
magnetic field could we generate and what shapes would they form that
we could use the harnessed light. To change the multi-dimensional
physical world. One might find how all the
elements are interchangeable and are multi-dimensional and finding the
other side of physics and the mathematic equations that we cannot see
or detect because our consciousness cannot find it, finding this would
be the greatest discovery of the human race. What lie's Beyond Quantum
Physics and how do we get there. Is the key magnetic Frequency's? But
the amount of energy it would take would be more than just at the
atomic level or sub-atomic level. One day In the future a person may
find a multi-dimensional, multi-time, multi-universe. The problem with
finding it is a realm of that we cannot see, is finding what we cannot
detected. Finding the other side of quantum physics will be the future
goal of human exploration. Our universe started with one wave length of
light and
an anti-wave length then magnetism and gravity they where changed to
form all matter: Wave Length - Gravity -Light - mass - Wave Lengths.
(THEY ARE ALL INTERCHANGEABLE)" PICO SECTORS AND VECTORS IN OUR QUANTUM
TUNNEL! Mass = gas, solid, liquid and there all inter-changeable.

For instance, if you wanted to know something about the results of a
calculation for several different we views the world of computing or
quantum computing as 1,0 or on and off but why not try rotation on or
rotation off as one changes the state of the other two, 1 or 0 but
instead not using the 1,0 but the state of 3=1 degrees that way a 360
degree can be divided by 3 into even parts where when you divided 1/3=
.3333333333333333 So what I'm trying to say is forget 3.14 and start
with using degrees and use the matrix visualization of a perfect flat
pyramid can be split perfect by three just like a circle. Then in all
dimensions. But in the world of true quantum physics you will always
have One left over to carry on the to the next calculation that's why
everything ends up 99.9% 1% on for the
next calculation. So you are going to have to extract the constant from
quantum chaos for the answer and subtract the 1 that travels On. +,*,
/, <,>, =,-, + Our universe started with one wave length of light and
an anti-wave length then magnetism and gravity they where changed to
form all matter: Wave Length - Gravity -Light - mass - Wave Lengths.
(THEY
ARE ALL INTERCHANGEABLE)" PICO SECTORS AND VECTORS IN OUR QUANTUM
TUNNEL! Mass = gas, solid, liquid and there all inter-changeable it the
Fundamental Frequency's is the true law of physics that controls all
and how many degrees are frequency's 360 in 32 Dimensions or more
moving 4 with one left over cal it a door. There is light of a unseen
or seen nature inside the atom structure that we have not found yet,
because there are 4 seen light and 4 unseen called refraction and have
yet to understand how it bounces and reflects or refracts light but by
mean of changing the structure of the atom and we are using for quantum
physics it gets allot smaller. If you could harness the light of one
atom to construct like hydrogen and then built on that one to find new
elements new physics new computer and new worlds would be found.

BY ZETALIMIT AKA TIMOTH HARRIS LIVERNACE


Thanks for the support http://www.beyond-science.com/






PART OF THE QUANTUM A.I KEY TO THE WEBSITE
A.I question  Quadra light of quantum consciousness
can go in all consciousness  Dimensions we understand that Wave Length
- gravity - Light - mass - Wave Lengths. (THEY ARE ALL INTERCHANGEABLE)
In all infinite shapes of magnetic field of a north and south field and
anti-magnetic like anti-gravity of 1 2 3 4  doing the same or all four
switching to the other moving faster then the speed of light and then
integrating faster then matter integrates and integrates and faster
then all  Dimensions Wave Length - gravity - Light - mass - Wave
Lengths then making a hypercube, infinite directions  teleportation,
black hole, space, gravity, light, one wave lengths, gravity - Light -
mass - "Wave Lengths" and then the fields in all direction. Quadra
light optics. There are infinite number of colors and hues if you mix
them together and then there are infinite number of magnetic field that
goes with that spectrum small but can be compressed using white noise
and offsetting the frequencies and compress with anti-white nose or
with mirrors or time dilation. Then build your own
_________________________ I have already seen!
Try different colors of quartz crystals and you measure the different.



From bh at intevation.de  Wed Feb  2 09:48:20 2005
From: bh at intevation.de (Bernhard Herzog)
Date: Wed, 02 Feb 2005 15:48:20 +0100
Subject: Hey, get this!
References: <mailman.1509.1106923923.22381.python-list@python.org>
	<ctdlpq$ukf$00$1@news.t-online.com>
	<k%WKd.98003$Jk5.87621@lakeread01> <4200E5CB.6020508@holdenweb.com>
Message-ID: <s9z4qgvrpaj.fsf@salmakis.intevation.de>

Steve Holden <steve at holdenweb.com> writes:

> What *I* would like to know is: who is allowing the import of bsddb.os,
> thereby somehow causing the code of the os library module to be run a
> second time.

I would guess (without actually running the code) that this part is
responsible:

>          if package:
>              module.__path__ = sys.path

You usually should initialize a package's __path__ to an empty list.
The __init__ module will take care of modifying it if necessary.

   Bernhard

-- 
Intevation GmbH                                 http://intevation.de/
Skencil                                           http://skencil.org/
Thuban                                  http://thuban.intevation.org/


From steven.bethard at gmail.com  Wed Feb  9 18:54:35 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 09 Feb 2005 16:54:35 -0700
Subject: empty classes as c structs?
In-Reply-To: <1grqs37.1sjjd0b162e5z4N%aleaxit@yahoo.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>
	<mailman.1973.1107618702.22381.python-list@python.org>
	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>
	<mailman.2006.1107658273.22381.python-list@python.org>
	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>
	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>
	<mailman.2049.1107750700.22381.python-list@python.org>
	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com>
	<4207606E.4040806@iinet.net.au> <cu8amb$ufa$1@sea.gmane.org>
	<mailman.2158.1107859833.22381.python-list@python.org>
	<1grnyld.1t8l5kw1nr5aqsN%aleaxit@yahoo.com>
	<E7CdnTFdo5S8AZffRVn-og@comcast.com>
	<1grqs37.1sjjd0b162e5z4N%aleaxit@yahoo.com>
Message-ID: <H4ednd10C8QmP5ffRVn-tw@comcast.com>

Alex Martelli wrote:
> Steven Bethard <steven.bethard at gmail.com> wrote:
> 
>>I didn't know what to do for __setattr__...  Was that what you meant by
>>"The best semantics for _bindings_ as opposed to lookups isn't clear 
>>though"?
> 
> Yep.  __delattr__ ain't too obvious to me either, though I guess your
> semantics for that are OK.

I'm not sure how much _I_ like them... =) It makes me uneasy that

     del b.x
     print b.x

doesn't throw an AttributeError.  OTOH, if you're using namespaces as 
the equivalent of nested scopes, deleting all 'x' attributes is probably 
not what you want...

I like the idea of chain, though, so I'll probably add the class with 
just __init__ and __getattribute__ to the current implementation.  I'm 
willing to be persuaded, of course, but for the moment, since I can see 
a few different options, I'm refusing the temptation to guess on the 
"most natural" behavior for __delattr__ and __setattr__...  =)

Steve


From steve at holdenweb.com  Wed Feb  2 16:04:17 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 02 Feb 2005 16:04:17 -0500
Subject: Finding user's home dir
In-Reply-To: <5i9rtc.rq31.ln@orion.homeinvalid>
References: <5i9rtc.rq31.ln@orion.homeinvalid>
Message-ID: <tkbMd.102633$Jk5.10093@lakeread01>

Nemesis wrote:

> Hi all, I'm trying to write a multiplatform function that tries to
> return the actual user home directory. I saw that
> os.path.expanduser("~") works on Linux but on Windows2000 (at least on
> the win I used) it returns %USERPROFILE%, so I tried os.environ["HOME"]
> and it gave me the same results. So I ended up with
> os.environ["USERPROFILE"], it doesn't work on Linux but (at least) on
> Windows2000 it returns the correct information
> 
> I googled a little bit and it seems that there is no general solution,
> so I tried to merge what I found, and I wrote this little function:
> 
> def getHomeDir():
>     ''' Try to find user's home directory, otherwise return current directory.'''
>     try:
>         path1=os.path.expanduser("~")
>     except:
>         path1=""
>     try:
>         path2=os.environ["HOME"]
>     except:
>         path2=""
>     try:
>         path3=os.environ["USERPROFILE"]
>     except:
>         path3=""
> 
>     if not os.path.exists(path1):
>         if not os.path.exists(path2):
>             if not os.path.exists(path3):
>                 return os.getcwd()
>             else: return path3
>         else: return path2
>     else: return path1
> 
> Please, could you test it on your systems and tell me what you got?
> I'd like to know what it returns on different operating systems because
> I'm developing a multiplatform software.
> 
> Thank you all.

It works on Cygwin too!

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005          http://www.python.org/pycon/2005/
Steve Holden                           http://www.holdenweb.com/


From nav+posts at bandersnatch.org  Thu Feb 17 14:25:14 2005
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: Thu, 17 Feb 2005 14:25:14 -0500
Subject: [EVALUATION] - E02 - ULTIMATE RECIPE TO RESOLVE ALL ISSUES
References: <cuo71l$gig$1@usenet.otenet.gr> <cuv1st$6um$1@swifty.westend.com>
	<cv2m54$hnf$1@usenet.otenet.gr>
Message-ID: <87ll9n7zvp.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>

Ilias Lazaridis <ilias at lazaridis.com> writes:

> This thread proofs simply the inability of this community [1] to focus
> on a simple essence.

Many communities extend a sort of "provisional membership" to new
arrivals, and grant newcomers the same respect and courtesy that
established members recieve. I make this distinction to point out that
you are not a member of the Python community simply because you posted
in a community newsgroup, but a newcomer with provisional status.
I don't speak for the Python community, but from the consistent nature
of the responses to your posts, it looks like your provisional
membership has been revoked.

Secondly, when two parties disagree about matters of etiquette, the
party that is new to the community is almost certainly the one who has
erred.

I think you could undo the damage you have done by spending some time
here, and learning that this is a community of intelligent, friendly,
humorous, and insightful people. Come with suggestions, and not
demands. Show us how you would like a community to behave, instead of
acting like we owe you something.

That's how we make the world a better place.

Nick

-- 
#  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this to a python
print reduce(lambda x,y:x+chr(ord(y)-1),' Ojdl!Wbshjti!=obwAcboefstobudi/psh?')


From steve at holdenweb.com  Sat Feb 12 17:00:53 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 12 Feb 2005 17:00:53 -0500
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
In-Reply-To: <cukut2$94s$1@usenet.otenet.gr>
References: <ctsjmg$75p$1@usenet.otenet.gr> <cukut2$94s$1@usenet.otenet.gr>
Message-ID: <s%uPd.107074$Jk5.8822@lakeread01>

Ilias Lazaridis wrote:

> Ilias Lazaridis wrote:
> [...]
> 
>> My question is essentially:
>>
>> How many of those constructs are already supported by python (and the 
>> surrounding open-source-projects):
>>
>> http://lazaridis.com/case/stack/index.html
> 
> [...]
> 
> The Signal/Noise ratio of this thread was very disapointing to me.
> 
> I've expected better things from the python community.
> 
> Thanks to everyone which has provided in-topic replies.
> 
> ..
> 
If this is "goodbye" I can't say I'm sorry.

regards
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From aahz at pythoncraft.com  Mon Feb  7 18:50:26 2005
From: aahz at pythoncraft.com (Aahz)
Date: Mon, 7 Feb 2005 18:50:26 -0500
Subject: BayPIGgies: February 10, 7:30pm
Message-ID: <20050207235026.GA17191@panix.com>

[Argh -- ignore wrong date on last post]

WARNING: the last meeting of BayPIGgies at Stanford is currently
scheduled for March.  Our host, Danny Yoo, is leaving Stanford, and we
need to find a new location.  If you wish to assist with the search,
please join the BayPIGgies mailing list.

Meanwhile, let's all give hearty thanks to Danny for helping us find a
stable meeting location for so long!


The next meeting of BayPIGgies will be Thurs, February 10 at 7:30pm.  

Donovan Preston will preview his PyCon presentation on developing GUI
applications with HTML and HTTP.  If you want to do a presentation in
March (also before PyCon!), please send e-mail to
baypiggies at baypiggies.net

BayPIGgies meetings are in Stanford, California.  For more information
and directions, see http://www.baypiggies.net/


Before the meeting, we may meet at 6pm for dinner in downtown Palo Alto.
Discussion of dinner plans is handled on the BayPIGgies mailing list.


Advance notice: The March 10 meeting agenda has not been set.  Please
send e-mail to baypiggies at baypiggies.net if you want to make a
presentation.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From richie at entrian.com  Fri Feb 11 04:22:35 2005
From: richie at entrian.com (Richie Hindle)
Date: Fri, 11 Feb 2005 09:22:35 +0000
Subject: lambda and for that matter goto not forgetting sugar
In-Reply-To: <5non019hhm2uu2i2hhic9eu3eh21o2ct8u@4ax.com>
References: <tFJOd.38794$68.10179@fe1.news.blueyonder.co.uk>
	<mailman.2321.1108048902.22381.python-list@python.org>
	<5non019hhm2uu2i2hhic9eu3eh21o2ct8u@4ax.com>
Message-ID: <h9to01hqj37s8o4l46qfc31c3ol5ohk32k@4ax.com>


[Christos]
> *Three* requests --check the thread "goto, cls, wait  commands".

I saw that too, and was too freaked out to respond.

> BTW, my sincere congratulations for what I presume best computer related April's
> Fool joke of all time; I love double-bluffs.  The worst of all is I've often
> referenced your joke when advocating python... :)

Thanks!  I think the fact that it was possible at all is a *genuine*
advert for Python's power and flexibility.  (Though modifying Python
itself in order to make the joke possible was quite a lot of work:
http://sf.net/tracker/?func=detail&atid=305470&aid=643835&group_id=5470
8-)

[John]
> from goto.py ( http://entrian.com/goto/ ):
> .        # Label: "label .x"  XXX Computed labels.
> 
> :-)

Yay!  I've been waiting nearly a year for someone to spot that.  8-)

-- 
Richie Hindle
richie at entrian.com



From nghoffma at gmail.com  Fri Feb  4 22:38:25 2005
From: nghoffma at gmail.com (nghoffma)
Date: 4 Feb 2005 19:38:25 -0800
Subject: returning True, False or None
In-Reply-To: <1107573625.439409.100870@o13g2000cwo.googlegroups.com>
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
	<1107573625.439409.100870@o13g2000cwo.googlegroups.com>
Message-ID: <1107574705.956498.219490@c13g2000cwb.googlegroups.com>

sorry, that should have been:

py>>import sets
py>>def doit(thelist):
...     s = sets.Set(thelist)
...     if  s == sets.Set([None]):
...             return None
...     else:
...             return max(s - sets.Set([None]))



From tzot at sil-tec.gr  Fri Feb  4 19:07:12 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Sat, 05 Feb 2005 02:07:12 +0200
Subject: Crashing Python interpreter! (windows XP, python2.3.4, 2.3.5rc1,
	2.4.0)
References: <mailman.1810.1107433431.22381.python-list@python.org>
	<1107475081.100242.242920@f14g2000cwb.googlegroups.com>
Message-ID: <7r0801pqto29eiusrcbko8ptf75dmkrhap@4ax.com>

On 3 Feb 2005 15:58:01 -0800, rumours say that "John Machin"
<sjmachin at lexicon.net> might have written:

>> I don't know why searching all drives using windows 'search' did not
>find the file!
>
>Possibilities:
>1. You have a virus that renames the drwtsn32.log file for the duration
>of a search.
>2. Emanations from UFOs are affecting computer circuitry in your
>neighbourhood.
>3. Microsoft programmers stuffed up.
>4. You had a typo.

5. XP really knows better than you and by default does not search in system
folders.  I killed that oh-so-friendly search dog on day 2 of acquainting myself
with Windows XP last September, so I can't readily say where is the setting if
your dog is enabled, but if your dog is dead too, it's under Advanced Options:
Search system folders.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From eddie at holyrood.ed.ac.uk  Mon Feb 28 09:51:31 2005
From: eddie at holyrood.ed.ac.uk (Eddie Corns)
Date: Mon, 28 Feb 2005 14:51:31 +0000 (UTC)
Subject: Trouble using telentlib
References: <467fdeba.0502111441.4a558e2a@posting.google.com>
Message-ID: <cvvb5j$a5m$1@scotsman.ed.ac.uk>

nitinzep at yahoo.com (Nitin Chaumal) writes:

>I sarched the existing threads but didnt find an answer to this.

>I am writing simple script which uses telentlib to open a session with
>a unix machine and run "tail -f logfile.txt" on one of the logfiles.

>import telnetlib

>HOST = "192.X.X.X"
>user = "myname"
>password = "mypass"

>tn = telnetlib.Telnet(HOST)

>tn.read_until("login: ")
>tn.write(user + "\n")
>if password:
>    tn.read_until("Password: ")
>    tn.write(password + "\n")

>tn.write("tail -f /tmp/logfile.txt\n")

># what do i write here ? #

>tn.write("exit\n")

>I want to read every line of the output into a string and run regex on
>it.
>I tried tn.interact() which does show me the ouput but the CPU usage
>on my win2k machine reaches 99% !! :(

>How do i execute a command and then read its output, then another
>command and read its output and so on. I tried to find docs on
>telnetlib but in vain.

>Can somebody guide me please

>Thanks
>Nitin

tn.write("tail -f /tmp/logfile.txt\n")
while True:
  # get one more line
  line = tn.read_until ('\n')
  regex_thing (line)

Remember, "tail -f" never exits, so you probably want to break when you've
find what you want and then just close the telnet session.  It would probably
be nice if telnetlib had a readline function that handled all the messy
details for portable end of line checking.

Eddie


From dave at pythonapocrypha.com  Fri Feb  4 09:30:30 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Fri, 04 Feb 2005 07:30:30 -0700
Subject: OT: why are LAMP sites slow?
In-Reply-To: <ctvvq4$bgs$1@sea.gmane.org>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>	<kavad2-59d.ln1@eskimo.tundraware.com>
	<ctvvq4$bgs$1@sea.gmane.org>
Message-ID: <42038706.2090209@pythonapocrypha.com>

Fredrik Lundh wrote:
> Tim Daneliuk wrote:
> 
> 
>>THis is why, IMHO, things like SOAP a laughable - RPC is a poor
>>foundation for reliable, durable, and high-performance TP.  It might be
>>fine for sending an order or invoice now and then, but sustained through-
>>put of the sort I think of as "high" performance is likely never going to be
>>accomplished with session-oriented architectures.
> 
> 
> does 50 gigabytes per day, sustained, count as high performance in your book?

In and of itself, no. But really, the number is meaningless in transaction 
processing without some idea of the size and content of the messages (i.e. if 
it's binary data that has to be base64 encoded just to make it work with SOAP) 
because what's most interesting is the number of transactions that can be handled.

If 50 GB/day is just a measurement of the throughput of the data transport 
layer, then that's fairly low - less than 5Mbps!

-Dave


From steve at holdenweb.com  Thu Feb 24 13:23:29 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 24 Feb 2005 12:23:29 -0600
Subject: Trouble with mysql-python 1.2.0 on Solaris 8 sparc
In-Reply-To: <1109255132.541839.207530@o13g2000cwo.googlegroups.com>
References: <1108755202.574729.293610@g14g2000cwa.googlegroups.com>	<1108925639.345790.230510@c13g2000cwb.googlegroups.com>
	<1109255132.541839.207530@o13g2000cwo.googlegroups.com>
Message-ID: <421E1BA1.2030703@holdenweb.com>

Alec Wysoker wrote:
> Hi Andy,
> 
> Thanks for your message.  It turned out that I had installed 64-bit
> mySql on a 32-bit machine.  I'm amazed it worked at all.  Anyway, I
> finally got mysql-python built, but I'm unable to connect to a machine
> on a remote host.  The problem doesn't seem to be with the python code,
> because I'm unable to do it even with the mysql command-line client.
> Sigh.
> 
Could be you have a 4.2 server and an earlier client. Unbelievably, 
MySQL changed its protocol while only incrementing the minor version 
number, and this bit me in the ass when I wanted to move up to 4.1.

regards
  Steve



From wuhy80 at gmail.com  Sun Feb 27 22:20:56 2005
From: wuhy80 at gmail.com (wuhy80)
Date: 27 Feb 2005 19:20:56 -0800
Subject: Python interfacing with other languages
In-Reply-To: <mailman.3125.1109548663.22381.python-list@python.org>
References: <mailman.3125.1109548663.22381.python-list@python.org>
Message-ID: <1109560856.234202.62790@l41g2000cwc.googlegroups.com>

Sure It can work with VB.
you could use the python's com to work with VB.



From jerf at jerf.org  Tue Feb  8 08:20:47 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 08 Feb 2005 08:20:47 -0500
Subject: Is Python as capable as Perl for sysadmin work?
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
	<mailman.2204.1107885796.22381.python-list@python.org>
	<Fn7Od.767$Sd.173030@newshog.newsread.com>
Message-ID: <pan.2005.02.08.13.20.47.237449@jerf.org>

On Tue, 08 Feb 2005 18:18:13 +0000, Marc Huffnagle wrote:

> Jeff Epler wrote:
>> 
>> There's another little-known fact about Python:  No string is permitted
>> to end with a backslash!  You might think that variations like
>>     r'\'
>> or
>>     """"""\\\\\""""""
>> would allow you to create this elusive value, but you'd mistaken!
>> Now, this may not bother Unix sysadmins, but the honest truth is that
>> you'll be administrating Windows systems, too, anywhere you work!
> 
>  >>> a = "\\"
>  >>> print a
> \

That's really the only problem you had with his post?

:-O

*wink*




From beliavsky at aol.com  Mon Feb 14 06:28:10 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 14 Feb 2005 03:28:10 -0800
Subject: FS: O'Reilly Python Pocket Reference
References: <1108360367.579794.122150@g14g2000cwa.googlegroups.com>
Message-ID: <1108380490.573983.291520@f14g2000cwb.googlegroups.com>

I think a better place than this newsgroup to offer used Python books
for sale is Amazon or Ebay or Alibris.



From steven.bethard at gmail.com  Fri Feb  4 13:14:23 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 04 Feb 2005 11:14:23 -0700
Subject: returning True, False or None
In-Reply-To: <5OOMd.12446$W16.3365@trndny07>
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
	<5OOMd.12446$W16.3365@trndny07>
Message-ID: <5sydnV6im6jgJp7fRVn-qQ@comcast.com>

Raymond Hettinger wrote:
> "Steven Bethard"
> 
>>For a given list:
>>* If all values are None, the function should return None.
>>* If at least one value is True, the function should return True.
>>* Otherwise, the function should return False.
> 
>  . . .
> 
>>Right now, my code looks like:
>>
>>     if True in lst:
>>         return True
>>     elif False in lst:
>>         return False
>>     else:
>>         return None
>>
>>This has a light code smell for me though -- can anyone see a simpler
>>way of writing this?
> 
> 
> return max(lst)

Very clever!  Thanks!

Steve


From peter at engcorp.com  Mon Feb 14 22:55:15 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 14 Feb 2005 22:55:15 -0500
Subject: wxPython OGL future
In-Reply-To: <1108428501.441786.154130@g14g2000cwa.googlegroups.com>
References: <1108428501.441786.154130@g14g2000cwa.googlegroups.com>
Message-ID: <aP-dnUwXT5aB7ozfRVn-ug@powergate.ca>

PD wrote:
> I am sort of a new developer to python and working in an academic
> environment. I climbed the learning curve on wxPython far enough to get
> the functionality I want out of it so far... Now Im in need of a
> diagramming library (something visio-like) to use for my software and
> the only option I have seen is OGL. Yet I read that OGL is dead, no
> longer maintained, obsucure and lacking documentation. 

Not actually having used it, I can't help much, but the code
is all there, runs fine in the latest demo, and looks pretty
clean.  Maybe you should examine it before you decide against
it.  If it does what you need, or if you can easily add the
missing functionality, what else would you want out of it?

-Peter


From farcepest at gmail.com  Thu Feb 10 20:08:04 2005
From: farcepest at gmail.com (Andy Dustman)
Date: 10 Feb 2005 17:08:04 -0800
Subject: Performance Issues of MySQL with Python
References: <1107954472.246556.258030@g14g2000cwa.googlegroups.com>
Message-ID: <1108084084.436203.140820@l41g2000cwc.googlegroups.com>

There aren't any "issues", but there are a few things to keep in mind.

First of all, prior to 4.1, MySQL does no parameter binding, which
means that the parameters must be inserted into your SQL statements as
literals. MySQLdb will do this for you automatically, but keep in mind
that you will be creating a string that is big as your original SQL
statement plus the size of all the parameters. If you are doing a large
INSERT (via executemany()), this could be pretty big. However, this is
no worse a problem with Python than it is with anything else.

MySQL-4.1 *does* support parameter binding, but MySQLdb does not yet.
The next major release will, but that is months off.

The other factor to account for is your result set. By default, MySQLdb
uses the mysql_store_result() C API function, which fetches the entire
result set into the client. The bigger this is, the longer it will take
for your your query to run. You can also use a different cursor type
which uses mysql_use_result(), which fetches the result set row by row.
The drawback to this are that you must fetch the entire result set
before you can issue another query. But again, this is not an issue
with Python.

Make sure you read PEP-249 and then the User's Guide.



From jeff at ccvcorp.com  Thu Feb 17 13:10:53 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Thu, 17 Feb 2005 10:10:53 -0800
Subject: Pausing a program - poll/sleep/threads?
In-Reply-To: <1108625477.222091.34680@l41g2000cwc.googlegroups.com>
References: <1108625477.222091.34680@l41g2000cwc.googlegroups.com>
Message-ID: <1119nf8qqj5gfbe@corp.supernews.com>

Simon John wrote:

> I'm writing a PyQt network client for XMMS, using the InetCtrl plugin,
> that on connection receives a track length.
> 
> [...]
> 
> So, how would I make a Python program automatically call a function
> after a preset period of time, without the Python process running in
> the foreground (effectively single-tasking)?

I'm not familiar with Qt/PyQt myself, but the GUI toolkits I *am* 
familiar with all have a concept of a timer.  Basically, you create a 
timer that, when the specified amount of time has elapsed, will either 
deliver an event/message to your application's event queue or will 
directly call the callback function you provide.

However, I'd suggest that you may not want to wait for the entire 
length of the current track, especially if some other process or user 
(on any machine) may have access to the same XMMS application.  What 
happens when, after the song's been playing for a few seconds, someone 
skips to the next track?  Presumably, you'll want your network client 
to detect that and update appropriately.  This implies that you should 
check back in with the XMMS "server" every few seconds at least.  (You 
can still use a timer to do this; just have it fire periodically every 
second or so, rather than only after several minutes.)

Jeff Shannon



From grante at visi.com  Mon Feb  7 21:27:07 2005
From: grante at visi.com (Grant Edwards)
Date: 08 Feb 2005 02:27:07 GMT
Subject: Big development in the GUI realm
References: <mailman.2123.1107820051.22381.python-list@python.org>
	<4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com>
	<cu95nd$7cr$1@news1.ucsd.edu>
	<6h7g0113up1v76k7qkad7bt17os1q73510@4ax.com>
Message-ID: <4208237b$0$21623$a1866201@visi.com>

On 2005-02-08, Luke Skywalker <luke at tatooine.planet> wrote:

>>Now, that's not to say that they are correct in their
>>interpretation of the GPL's terms. In fact, if I had to bet on
>>an outcome, I'd probably wager that the court would hold that
>>only static linking would force the program as a whole to
>>follow the GPL terms. However, I certainly don't have the money
>>to pony up to run a test case. Consequently, I try to follow
>>the wishes of the copyright holder.
>
> It's strange that something so central hasn't been clarified
> yet, but maybe it's part of the changes meant for V.3.

It's been made quite clear what the intention of the FSF is
in regard to static linking.  Trolltech also made their
intentions crystal clear.

> When you think about it, it'd be like banning any
> closed-source apps from being developed for Linux, since any
> application makes syscalls to the kernel

Wrong.  The kernel license _explicitly_ allows non GPL'd
programs to make calles via the published syscall API.

> and its libraries.

Wrong again.  First, the kernel does own any libraries. Second,
the libraries to which you refer are under the LGPL and other
licenses which explicitly allows distribution of non-GPL'd
programs that are linked dynamically with the libraries.

> But the fact is

Fact?  You seem to be very short on facts and are mostly just
making up shit as you go.

> that there are now closed-source apps for that platform, and
> are considered legit since those apps don't include code from
> the kernel, but instead, merely make calls to binary objects.

True, but moot.

> I fail to see the difference between making calls to the
> kernel API and making calls to Qt libraries.

BECAUSE IN THE KERNEL KERNEL COPYING FILE LINUS SAYS:

      NOTE! This copyright does *not* cover user programs that
      use kernel services by normal system calls - this is
      merely considered normal use of the kernel, and does
      *not* fall under the heading of "derived work". Also note
      that the GPL below is copyrighted by the Free Software
      Foundation, but the instance of code that it refers to
      (the Linux kernel) is copyrighted by me and others who
      actually wrote it.
 
AND TROLLTECH SAYS:

    Users who want to donate their source code to the Open
    Source community can use the Open Source version and must
    license their software under the GPL. Users who write
    commercial proprietary software must purchase a license and
    may freely choose how to license and profit from their
    software.

Spare us your clueless, junior-high legal analyses and just do
what's right: obey the wishes of the owners of the copyrights
in question.  They've made their intentions 100% clear, and if
you try to worm your way around them, you're dishonorable,
theiving scum.
    
-- 
Grant Edwards                   grante             Yow!  I know things about
                                  at               TROY DONAHUE that can't
                               visi.com            even be PRINTED!!


From tundra at tundraware.com  Tue Feb  1 01:58:15 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 01 Feb 2005 01:58:15 EST
Subject: tkinter: Can You Underline More Than 1 Char In A Menu Title
In-Reply-To: <056uv054s4ionvjt2ii8fcnm3hvcqqm8g2@4ax.com>
References: <d00nc2-ctm.ln1@eskimo.tundraware.com>
	<056uv054s4ionvjt2ii8fcnm3hvcqqm8g2@4ax.com>
Message-ID: <eel3d2-ds3.ln1@eskimo.tundraware.com>

Tim Roberts wrote:

> Tim Daneliuk <tundra at tundraware.com> wrote:
> 
>>I am currently underling the first character of a menu title (to indicate
>>its shortcut/accelerator key) like this:
>>
>>   self.WildBtn = Menubutton(self.mBar, text=WILDMENU, underline=0, state=DISABLED)
>>
>>However, I intend to actually have two separate keys invoke this menu
>>to have it behave differently in different circumstances.
> 
> 
> You can, of course, CHANGE the underlined character to match the
> circumstances.

Yeah, I understand that ... what I want is two characters simulatenously
underlined ... oh well, another solution will be arranged...

-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From jerf at jerf.org  Thu Feb 17 09:55:30 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 17 Feb 2005 09:55:30 -0500
Subject: [EVALUATION] - E02 - ULTIMATE RECIPE TO RESOLVE ALL ISSUES
References: <cuo71l$gig$1@usenet.otenet.gr> <cuv1st$6um$1@swifty.westend.com>
	<cv2m54$hnf$1@usenet.otenet.gr>
	<oTF1JdVCdOFCFwep@objmedia.demon.co.uk>
Message-ID: <pan.2005.02.17.14.55.29.665531@jerf.org>

On Thu, 17 Feb 2005 18:49:38 +0000, Stephen Kellett wrote:
> Incorrect analysis. This thread proves that you have no concept of how 
> to interact with the community. If you had done what many people asked 
> you to do, which is do some work yourself, then ask questions about the 
> few answers you didn't discover yourself, you would have got lots of 
> helpful answers. You were told this many times by many people. Also on 
> the odd occasion someone did proffer some on-topic advice, sometimes in 
> long articles that must have taken some time to produce you'd dismiss 
> the article with "It is not on topic, I have not read it". How could you 
> know if it is not on topic if you don't read it? Apart from the gross 
> rudeness in such an attitude it demonstrates your arrogance, selfishness 
> and utter contempt for those replying to you.

This is why I bailed on him, especially after the troll warning which
is now fully justified in my mind. I'm 99% positive that I could ship him
source code that meets every single one of his demands, and he'd *still*
be bitching and posting, because he *would not realize it*, because of
course he'd still have to read docs and learn how to use it.

Moderately on topic (not Python, but programming at least): The other day
I was talking to someone and I commented on how odd it is to write a
library, and *still* have to learn how to use it correctly. As the
author, at least I can change it as I learn more, but even so, I have to
learn how to use it; even as the author I am not imbued magically with
expert status. 

I actually think that 95% of what Ilias is claiming to be looking for is
there, packaged up and almost ready to go. But he will never realize that,
since we can't jump him to expert status in a four-line newsgroup post,
so, *shrug*, he loses I guess. 




From just at xs4all.nl  Sat Feb 26 20:02:09 2005
From: just at xs4all.nl (Just)
Date: Sun, 27 Feb 2005 02:02:09 +0100
Subject: any Python equivalent of Math::Polynomial::Solve?
References: <just-420C1F.16423926022005@news1.news.xs4all.nl>
	<cvqgn5$n0b$1@e250.ripco.com>
	<just-8EF886.20462126022005@news1.news.xs4all.nl>
	<cvqmvt$2rm$1@e250.ripco.com>
	<just-D38ED0.21594026022005@news1.news.xs4all.nl>
	<I68Ud.577$Cg6.256@twister.rdc-kc.rr.com>
Message-ID: <just-F282AA.02020927022005@news1.news.xs4all.nl>

In article <I68Ud.577$Cg6.256 at twister.rdc-kc.rr.com>,
 "Raymond L. Buvel" <levub137 at wi.rr.com> wrote:

> Just wrote:
> <snip>
> > 
> > SciPy indeed appear to contain a solver, but I'm currently stuck in 
> > trying to _get_ it for my platform (OSX). I'm definitely not going to 
> > install a Fortran compiler just to evaluate it (even though my name is 
> > not "Ilias" ;-). Also, SciPy is _huge_, so maybe a Python translation of 
> > that Fortran code or your Perl code will turn out to be more attractive 
> > after all...
> > 
> > Just
> 
> The GNU Scientific Library has a nice root finder for polynomials with 
> real coefficients.  I have wrapped this with Pyrex to work with my 
> ratfun module see:
> 
> http://calcrpnpy.sourceforge.net/ratfun.html
> 
> If this will suit your needs, I can send you an alpha release of the 
> package with the root finder.  It is not pure Python.  I requires Pyrex 
> and a C compiler to install.  My guess is that it will work on OSX as 
> well as it does on Linux.  This functionality will be included in the 
> next release of the ratfun package but I still have to unit test a 
> number of components and update the documentation.  Consequently, an 
> official release will not happen soon.

Thank you, I'll check this out. I had come across GSL, but not Python 
bindings. (GPL is probably a problem for my project, but it's very good 
to know anyway.)

On the other hand, I just finished translating the relevant portions of 
Math::Polynomial::Solve to Python, so I'm probably all set, at least for 
now. Thanks everyone for the responses, especially to John Gamble!

Just


From nick at craig-wood.com  Tue Feb  8 12:30:58 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 08 Feb 2005 17:30:58 GMT
Subject: Efficient checksum calculating on lagre files
References: <5o2nd2-5hl.ln1@pluto.i.infosense.no>
Message-ID: <slrnd0hrou.l3u.nick@irishsea.home.craig-wood.com>

Ola Natvig <ola.natvig at infosense.no> wrote:
>  Hi all
> 
>  Does anyone know of a fast way to calculate checksums for a large file. 
>  I need a way to generate ETag keys for a webserver, the ETag of large 
>  files are not realy nececary, but it would be nice if I could do it. I'm 
>  using the python hash function on the dynamic generated strings (like in 
>  page content) but on things like images I use the shutil's 
>  copyfileobject function and the hash of a fileobject's hash are it's 
>  handlers memmory address.
> 
>  Does anyone know a python utility which is possible to use, perhaps 
>  something like the md5sum utility on *nix systems.

Here is an implementation of md5sum in python.  Its the same speed
give or take as md5sum itself.  This isn't suprising since md5sum is
dominated by CPU usage of the MD5 routine (in C in both cases) and/or
io (also in C).

I discarded the first run so both tests ran with large_file in the
cache.

$ time md5sum large_file
e7668fdc06b68fbf087a95ba888e8054  large_file

real    0m1.046s
user    0m0.946s
sys     0m0.071s

$ time python md5sum.py large_file
e7668fdc06b68fbf087a95ba888e8054  large_file

real    0m1.033s
user    0m0.926s
sys     0m0.108s

$ ls -l large_file
-rw-r--r--  1 ncw ncw 115933184 Jul  8  2004 large_file


"""
Re-implementation of md5sum in python
"""

import sys
import md5

def md5file(filename):
    """Return the hex digest of a file without loading it all into memory"""
    fh = open(filename)
    digest = md5.new()
    while 1:
        buf = fh.read(4096)
        if buf == "":
            break
        digest.update(buf)
    fh.close()
    return digest.hexdigest()

def md5sum(files):
    for filename in files:
        try:
            print "%s  %s" % (md5file(filename), filename)
        except IOError, e:
            print >> sys.stderr, "Error on %s: %s" % (filename, e)

if __name__ == "__main__":
    md5sum(sys.argv[1:])

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


From harlinseritt at yahoo.com  Sun Feb 27 03:41:48 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 27 Feb 2005 00:41:48 -0800
Subject: function expression with 2 arguments
In-Reply-To: <1109453122.034646.290200@z14g2000cwz.googlegroups.com>
References: <1109419984.213993.49280@f14g2000cwb.googlegroups.com>
	<98ydnSp0COmeLr3fRVn-jQ@powergate.ca>
	<1109453122.034646.290200@z14g2000cwz.googlegroups.com>
Message-ID: <1109493708.942841.231700@o13g2000cwo.googlegroups.com>

?



From tjreedy at udel.edu  Mon Feb  7 22:16:52 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 7 Feb 2005 22:16:52 -0500
Subject: variable declaration
References: <1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com><MSGID_2=3A5025=2F3.131_4207fd24@fidonet.org><UmSNd.104914$Jk5.59261@lakeread01>
	<4208178F.40804@po-box.mcgill.ca>
Message-ID: <cu9ask$r81$1@sea.gmane.org>


"Brian van den Broek" <bvande at po-box.mcgill.ca> wrote in message 
news:4208178F.40804 at po-box.mcgill.ca...
> Is the right way to understand it in this vicinity:

In the vicinity, but not quite exact

>At compile time (by which I mean when the Python bytecode is built)

Compile time is when the def statement is executed

>the global statement is hit and has the effect of `bumping up' the 
>function local name `x' to the module namespace, making the function local 
>name `x' synonymous with the module global name `x'.

Global make 'x' global.  Period.  There is no local 'x'.

> At runtime, the `global x' is never reached,

In CPython, at least, it is not even there to be reached (see below).
It is strictly a compile time declaration.  At runtime, it is equivalent to 
'pass'.

> but it has already, at compile time, had its effect on the nature of the 
> function object

Right.  With 2.2:

def f():
  if False: global x
  x = 1

import dis
dis.dis(f)
      0 SET_LINENO               1

      3 SET_LINENO               2
      6 LOAD_GLOBAL              0 (False)
      9 JUMP_IF_FALSE            7 (to 19)
     12 POP_TOP

     13 SET_LINENO               2
     16 JUMP_FORWARD             1 (to 20)
>>   19 POP_TOP

>>   20 SET_LINENO               3
     23 LOAD_CONST               1 (1)
     26 STORE_GLOBAL             1 (x)
     29 LOAD_CONST               0 (None)
     32 RETURN_VALUE

Two points: there is no byte code for the global declaration; x is directly 
stored as global.

Terry J. Reedy





From tbunce at mac.com  Tue Feb  1 17:27:02 2005
From: tbunce at mac.com (Thomas Bunce)
Date: Tue, 01 Feb 2005 14:27:02 -0800
Subject: How do you do arrays
References: <tbunce-0102051052450001@192.168.1.12>
	<1107286861.714451.288010@f14g2000cwb.googlegroups.com>
Message-ID: <tbunce-0102051427020001@192.168.1.12>

Learning Python O'Reilly book and Python In A Nut Shell and about 2 inchs
printed of Web information

       Tom

In article <1107286861.714451.288010 at f14g2000cwb.googlegroups.com>,
"Kartic" <kartic.krishnamurthy at gmail.com> wrote:

> Tom,
> 
> It has to be iMatrix.append(k), not iMatrix[index] = k. Python will
> give an error - list assignment index out of range - for that.
> Just curious - what book are you following?
> 
> -Kartic


From dimitri.pater at gmail.com  Fri Feb  4 07:21:45 2005
From: dimitri.pater at gmail.com (dimitri pater)
Date: Fri, 4 Feb 2005 13:21:45 +0100
Subject: walktree browser filenames problem
In-Reply-To: <ctvn8e$9hv$1@blackmamba.itd.rl.ac.uk>
References: <mailman.1877.1107516622.22381.python-list@python.org>
	<ctvn8e$9hv$1@blackmamba.itd.rl.ac.uk>
Message-ID: <e75321bd05020404216acc5a5d@mail.gmail.com>

thanks!
now it works:
ret.append('   <tr><td class="file"><a
href=http://e-bench.serpia.com/upload/%s>%s</a></td></tr>\n' %
(urllib.quote(escape(name)),escape(name)))

bye,
Dimitri


On Fri, 4 Feb 2005 11:45:17 -0000, Richard Brodie <R.Brodie at rl.ac.uk> wrote:
> 
> "dimitri pater" <dimitri.pater at gmail.com> wrote in message
> news:mailman.1877.1107516622.22381.python-list at python.org...
> 
> > The problem is that the filenames are cut off in the status bar of the
> > browser because of the white space (eg 'hello.pdf' works, but 'hello
> > there.pdf' is displayed as hello).
> 
> urllib.quote() should do the trick. You need to follow the rules for
> encoding URIs as well as the HTML ones.
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
Please visit dimitri's website: www.serpia.com


From edreamleo at charter.net  Fri Feb 25 07:49:22 2005
From: edreamleo at charter.net (Edward K. Ream)
Date: Fri, 25 Feb 2005 06:49:22 -0600
Subject: Leo 4.3-a3 Outlining IDE
References: <JcFTd.21785$Sl7.19428@fe03.lga>
Message-ID: <ggFTd.21787$Vn7.264@fe03.lga>

I really only posted this once to comp.lang.python.  The duplicate appears 
to be the work of the Department of Redundancy Department.

Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: Literate Editor with Outlines
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From grante at visi.com  Tue Feb  1 13:00:36 2005
From: grante at visi.com (Grant Edwards)
Date: 01 Feb 2005 18:00:36 GMT
Subject: Where are list methods documented?
References: <41ffba7d$0$15879$a1866201@visi.com>
	<mailman.1703.1107279798.22381.python-list@python.org>
Message-ID: <41ffc3c4$0$10772$a1866201@visi.com>

On 2005-02-01, Brian van den Broek <bvande at po-box.mcgill.ca> wrote:

> I'm not positive I understand what you are looking for, but do these 
> help?:
>
><http://www.python.org/doc/2.4/lib/built-in-funcs.html#l2h-15>
><http://www.python.org/doc/2.4/lib/typesseq.html>
><http://www.python.org/doc/2.4/lib/typesseq-mutable.html>

Yes, that last page was the one I was looking for.  I didn't
know enough to spell list as "mutable sequence type".

-- 
Grant Edwards                   grante             Yow!  I think my CAREER
                                  at               is RUINED!!
                               visi.com            


From bvande at po-box.mcgill.ca  Wed Feb 23 13:12:04 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Wed, 23 Feb 2005 13:12:04 -0500
Subject: Selective HTML doc generation
In-Reply-To: <1109169752.819253.202930@o13g2000cwo.googlegroups.com>
References: <1109169752.819253.202930@o13g2000cwo.googlegroups.com>
Message-ID: <421CC774.8040304@po-box.mcgill.ca>

Graham said unto the world upon 2005-02-23 09:42:
> Hi. I'm looking for a documentation generation tool (such as pydoc,
> epydoc, happydoc, etc.) that will allow me to filter what it includes
> in
> it's output.
> 
> I only want the reader to know about classes and methods in my package
> if if the classes have docstrings. I've got a large package that is
> used
> by relatively non-technical users (and yet they write Python!) that
> documents the public API with docstrings. I don't want to clutter their
> view of the world with links to the package's internal classes and
> documentation that covers things like __special__ methods.
> 
> Anybody know of anything that let's you do it? I realise I may end up
> doing some hacking here but don't want to repeat work unnecessarily.
> 
> Cheers,
> 
> Graham

Hi Graham,

<Warning> I'm not at all an expert </Warning>

OK, that out of the way:

I recently wanted pydoc to display information about my methods whose 
names started with one or more underscores, so that I could see in the 
docs for the objects in my first bigger than small project.

I managed with a small change to the visiblename function of pydoc.py.
It looks to me that this is also the place where you'd want to put in 
code to filter for only treating objects with docstrings. *How* to do 
that is something I've not read enough of pydoc.py to speak to.

Omitting special methods is easy, though. The code says:
     # Private names are hidden, but special names are displayed.
     if name.startswith('__') and name.endswith('__'): return 1
So, just change the 1 to a 0. (The `private' logic is a few lines 
down.) Easy :-)

Hope that is at least of some help. Best,

Brian vdB




From onurb at xiludom.gro  Mon Feb 21 05:25:46 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Mon, 21 Feb 2005 11:25:46 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cv2lae$cat$4@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr>
	<XX+64LRqnLECFwAV@objmedia.demon.co.uk>
	<cut6t9$sla$1@usenet.otenet.gr>
	<42123751$0$10042$626a14ce@news.free.fr>
	<cutem3$2t6$2@usenet.otenet.gr>
	<421244f0$0$30339$636a15ce@news.free.fr>
	<cutipk$l5a$1@usenet.otenet.gr>
	<421284dc$0$14312$626a14ce@news.free.fr>
	<cv2lae$cat$4@usenet.otenet.gr>
Message-ID: <4219b72c$0$29993$636a15ce@news.free.fr>

Ilias Lazaridis wrote:
> Bruno Desthuilliers wrote:
> [...]
> 
> closing thread
> http://groups-beta.google.com/group/comp.lang.python/msg/f2ae9cdbe16676d1
> 
Nope. You are not entitled to close thread. This is irrelevant.
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for 
p in 'onurb at xiludom.gro'.split('@')])"


From fakeadmin at gmail.com  Thu Feb 10 22:22:37 2005
From: fakeadmin at gmail.com (rhat)
Date: 10 Feb 2005 19:22:37 -0800
Subject: Unit Testing in Python
References: <1108087841.271630.228970@o13g2000cwo.googlegroups.com>
	<roy-D161EC.21340610022005@reader2.panix.com>
	<mailman.2361.1108089695.22381.python-list@python.org>
Message-ID: <1108092157.371659.282070@z14g2000cwz.googlegroups.com>

Yeah, you know I only ask questions about Test-driven development
basics in hopes of obtaining your personal information, so that I can
sell it on the Molodovian blackmarket. I'm not a "Phisher", I'm a
comp-sci major who's too lazy to dig around for his own answers. ;)

Thanks for your help Roy, I wasn't sure what the difference between
unittest and pyunit were.
--|2 \| /-\ |\| |</-\|_||_/-\|<15   (the uber-l33t version of my
supersecret "phishing" alias which just so happens to be my actual
name)

PS: Yeah, I too am plerplexed as to why gmail allowed me to register
"fakeadmin" as a login. Sure makes a good conversation started though.
=P



From alexander.dietz at mpi-hd.mpg.de  Wed Feb  2 18:04:48 2005
From: alexander.dietz at mpi-hd.mpg.de (alex)
Date: 2 Feb 2005 15:04:48 -0800
Subject: global variables
Message-ID: <1107385488.822768.317250@l41g2000cwc.googlegroups.com>

Hi,

is it possible to create 'global' variables that can be seen in all
other classes?

Alex



From pinard at iro.umontreal.ca  Wed Feb  9 09:25:34 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Wed, 9 Feb 2005 09:25:34 -0500
Subject: What's wrong with `is not None`?
In-Reply-To: <cuctda$c5k$1@lnx107.hrz.tu-darmstadt.de>
References: <mailman.2219.1107903975.22381.python-list@python.org>
	<cuctda$c5k$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <20050209142534.GA18527@alcyon.progiciels-bpi.ca>

[Stefan Behnel]

> Frans Englich schrieb:
> >What is the equivalent expression which is more secure; `!= None`?

> If I want to check for None, I always do it with "is". It's a constant
> after all...

So do I.  There is only one None object, for which an `is' test is
especially appropriate.

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From devnull at joreybump.com  Fri Feb  4 23:27:25 2005
From: devnull at joreybump.com (Jorey Bump)
Date: Sat, 05 Feb 2005 04:27:25 GMT
Subject: ANN: Frog 1.3 released (python 'blog' application)
References: <41fcf53b$0$28986$e4fe514c@news.xs4all.nl>
	<Xns95F373835F61Ddevnulljoreybumpcom@199.45.49.11>
	<4203df05$0$28985$e4fe514c@news.xs4all.nl>
Message-ID: <Xns95F3EE9DC44FEdevnulljoreybumpcom@199.45.49.11>

Irmen de Jong <irmen.NOSPAM at xs4all.nl> wrote in
news:4203df05$0$28985$e4fe514c at news.xs4all.nl: 

> I've added a 'filemgr' package to the files section; you can
> get the file manager separately from there.
> Or re-download the Frog-complete package (I've replaced it
> with a version where the file manager is included).
> 
> http://sourceforge.net/project/showfiles.php?group_id=41175
> 
> Read the README file first.
> 
> Please let me know what you think of Frog and the FileMgr.

Thanks, I'm impressed. However, I feel as though the file manager should be 
integrated with Frog in a such a way that it is enabled automatically for 
users when they are created. The mkuser.py script felt a bit awkward, 
especially when creating users was so easy in the administrative interface. 
And once logged in, a user shouldn't need to authenticate to the file 
manager separately. 

I understand that the file manager was developed as a standalone webapp, 
but the virtual user support is a big plus in Frog, and it would be great 
to start uploading images to blogfiles/user/ right away.


From gdamjan at gmail.com  Fri Feb 11 12:24:22 2005
From: gdamjan at gmail.com (Damjan)
Date: Fri, 11 Feb 2005 18:24:22 +0100
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<4207c8db$0$21623$a1866201@visi.com>
	<cub12p$pke$1@achot.icm.edu.pl>
	<36sip2F56jjmaU1@individual.net> <umzubw8xg.fsf@vh-s.de>
	<pan.2005.02.11.11.43.56.884015@jerf.org>
Message-ID: <374826F5851cbU1@individual.net>

> The problem with this is what I've called the "patch hole" in another
> context [1]. The problem with this definition is that I can *always*
> distribute GPL'ed parts separately and re-combine them arbitrarily upon
> execution, and it's not even particularly hard. Write your code with the
> GPL'ed code embedded. At the end, before you distribute, extract it and
> record the extraction so your program can "rewind it"; you're left with
> nothing in your code that is GPLed. Later, the user will go get the GPL
> software, and you software "rewinds" the extraction process, and the user
> is left with something that is byte-for-byte identical to what you weren't
> allowed to distribute by the GPL.... so what good was the GPL?

What you described is not ok according to the GPL - since you distributed a
binary thats derived from GPL software (and you didn't publish it source
code under the GPL too).

> Nobody really knows what the GPL means when it gets down to it; 

If you don't know, you should ask the person whose GPL code you are using.

-- 
damjan


From jeff at ccvcorp.com  Thu Feb 10 18:40:53 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Thu, 10 Feb 2005 15:40:53 -0800
Subject: [N00B] What's %?
In-Reply-To: <1108074594.398184.252120@f14g2000cwb.googlegroups.com>
References: <614c778e.0502100938.6665cb52@posting.google.com>
	<1108074594.398184.252120@f14g2000cwb.googlegroups.com>
Message-ID: <110ns5ma337s982@corp.supernews.com>

Harlin wrote:

> What good is the modulus operator? What would I ever need it for?
> 
> * A quick way of testing whether an integer is even and odd
> * For that matter, a quick way of testing whether a the variable is a
> factor of any other arbitrary number.
> * In some programs (a weight control program I worked on comes to mind)
> it's necessary to get a remainder so that you can get the results of a
> leftover evenly divisible number.

Also, it's a good way to ensure that some number is in a specified 
range, and "wraps around" to the beginning if it goes out of that 
range.  For a quick & cheesy example, let's say we want to count time 
for music:

import time
def beats = ['one', 'two', 'three', 'four']

n = 0
while True:
     print beats[n]
     n = (n+1) % 4
     time.sleep(0.5)

By using '% 4', I ensure that n is always in the interval [0...4) 
(including 0 but not including 4).

Modulus is useful for all sorts of periodic behavior.

Jeff Shannon
Technician/Programmer
Credit International



From qwweeeit at yahoo.it  Thu Feb 24 09:09:10 2005
From: qwweeeit at yahoo.it (qwweeeit)
Date: 24 Feb 2005 06:09:10 -0800
Subject: Shift Confusion
References: <1109225214.430739.259600@l41g2000cwc.googlegroups.com>
Message-ID: <2ab23d7a.0502240609.24755745@posting.google.com>

At programming level it seems correct (a part a "return" closure
needed for the "main" function).

But the error is IMHO conceptual:
for a char you need 7 bits (from 0 to 127 or in hex from x00 to x7F)
and you can't accomodate the other char in only one bit!
The other 128 symbols (from 128 to 255 or in hex from x80 to xFF) are
only possible because you use again 7 bits, but with the 8th bit set
to 1!

What you are trying to do I made in C language (some years ago...)
using however bytes and words, packing 2 bytes in only one word, but
you can't pack 2 chars (each one beeing nearly a byte) in a byte!


From Serge.Orlov at gmail.com  Sat Feb 12 03:17:08 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: Sat, 12 Feb 2005 11:17:08 +0300
Subject: sre is broken in SuSE 9.2
References: <mailman.2299.1108029731.22381.python-list@python.org><1108060527.378911.146240@o13g2000cwo.googlegroups.com><cugc2v$i8u$1@swifty.westend.com><1108064973.719544.228970@z14g2000cwz.googlegroups.com><mailman.2372.1108115088.22381.python-list@python.org><1108133339.401022.272310@f14g2000cwb.googlegroups.com>
	<mailman.2419.1108157546.22381.python-list@python.org>
Message-ID: <cuke25$fo8$1@news.comcor-tv.ru>

Fredrik Lundh wrote:
> Serge Orlov wrote:
>
>>>>>> re.compile(ur'\w+', re.U).findall(u'\xb5\xba\xe4\u0430')
>>>>>> [u'\xb5\xba\xe4\u0430']
>>
>> I can't find the strict definition of isalpha, but I believe average
>> C program shouldn't care about the current locale alphabet, so
>> isalpha is a union of all supported characters in all alphabets
>
> nope.  isalpha() depends on the locale, as does all other ctype
> functions (this also applies to wctype, on some platforms).

I mean "all supported characters in all alphabets [in the current
locale]". For example in ru_RU.koi8-r isalpha should return
true for characters in English and Russian alphabets. In
ru_RU.koi8-u -- for characters in English, Russia and Ukrain
alphabets, in ru_RU.utf-8 -- for all supported by the implementation
alphabetic characters in unicode. IMHO iswalpha in POSIX
locale can return true for all alphabetic characters in unicode
instead of being limited by English alphabet.

  Serge.

true in 




From claudio.grondi at freenet.de  Fri Feb  4 14:02:02 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Fri, 4 Feb 2005 19:02:02 -0000
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot>
	<1107487113.732375.110850@c13g2000cwb.googlegroups.com>
	<opslnmywarej1m1c@ashot>
	<mailman.1865.1107491434.22381.python-list@python.org>
	<opsln54fpwej1m1c@ashot> <36hculF51ho2sU1@individual.net>
	<1107530489.308497.103530@g14g2000cwa.googlegroups.com>
Message-ID: <36hrjpF4ui8fbU1@individual.net>

I use this one,
http://heanet.dl.sourceforge.net/sourceforge/uncpythontools/readline-1.7.win
32.exe
which I assume is the right one.

Any other ideas?

Claudio

"Fuzzyman" <fuzzyman at gmail.com> schrieb im Newsbeitrag
news:1107530489.308497.103530 at g14g2000cwa.googlegroups.com...
> Are you really using the readline module from newcenturycomputers ?
> I've got a feeling that's broken and you need to use the Gary Bishop
> one with IPython....
>
> Sorry if this is spurious... (restricted internet access, so I can't
> check for you... but the correct one is linked to from the IPython
> site).




From simoninusa2001 at yahoo.co.uk  Sun Feb  6 23:48:51 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 6 Feb 2005 20:48:51 -0800
Subject: WYSIWYG wxPython "IDE"....?
In-Reply-To: <4205fcd9@news.highway1.com.au>
References: <1107560658.584623.303310@o13g2000cwo.googlegroups.com>
	<4205fcd9@news.highway1.com.au>
Message-ID: <1107751731.066796.295170@g14g2000cwa.googlegroups.com>

Tim Hoffman wrote:
> Have you tried Boa Constructor ?
>
> http://boa-constructor.sourceforge.net/

Yeah, I was never very impressed with it either. The current version
doesn't seem to work with wxPython 2.5.3.1 though....

I guess there isn't a GUI builder that does what I want, back to the
manual way of doing things I guess, unless I use Qt for this project
maybe, and keep it to myself (due to the stupid Qt licensing).



From strombrg at dcs.nac.uci.edu  Fri Feb 25 20:21:59 2005
From: strombrg at dcs.nac.uci.edu (Dan Stromberg)
Date: Sat, 26 Feb 2005 01:21:59 GMT
Subject: netmask arithmetic?
Message-ID: <pan.2005.02.26.01.21.59.135616@dcs.nac.uci.edu>


Before I go and reinvent the wheel, does anyone already have python code
that can do netmask arithmetic - for example, determining if a list of
hostnames are on subnets described by a list of networks+netmasks like:

128.200.34.0/24
128.195.16.128/25

...and so on?

Thanks!



From jerf at jerf.org  Tue Feb  1 23:41:11 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 01 Feb 2005 23:41:11 -0500
Subject: hotspot profiler experience and accuracy?
References: <opsljvqucx6yt6e7@news.cisco.com>
Message-ID: <pan.2005.02.02.04.41.10.224571@jerf.org>

On Tue, 01 Feb 2005 19:24:20 -0800, aurora wrote:

> I have a parser I need to optimize. It has some disk IO and a lot of
> looping over characters.
> 
> I used the hotspot profiler to gain insight on optimization options. The
> methods show up on on the top of this list seems fairly trivial and does
> not look like CPU hogger. Nevertheless I optimized it and have 25%
> performance gain according to hotspot's number.

I can't answer your other question, but general optimization advice, since
I've been in this situation a couple of times: Generally, you're not
going to win in an interpreted language like Python* looping over all
chars. You should either eliminate those loops if possible, or move the
guts of the looping into regular expressions, which are designed to do
that sort of thing as optimally as possible. (I've never looked at the
internals, but I believe the "compile()" function in the re module isn't
just a way of conveniently sticking a regex into a variable; you are
actually creating a compiled and reasonably optimized (as long as you
don't get crazy) character scanner that you simply Can Not beat in pure
Python.)

As a last-ditch scenario, you could go to a C extension, but regexs should
be good enough, and only beatable in the simplest of cases.

Write good REs (you could ask for help, but you should probably just test
it yourself; the key thing to try for, I think, is to put as much into one
RE as possible and ask the match object which thing matched but I may be
wrong; more experienced comments welcomed), and then run the profiler
again.

In general though, the precise numbers coming out of the profiler are less
important than their relationships; as long as the relationships are
maintained the data is still good.

*: At current technology levels. Yes, someday optimization will make
looping over characters in Python even faster than C, or so the theory
goes. That's not today, or even tomorrow, though.


From steve at holdenweb.com  Tue Feb  1 20:37:43 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 01 Feb 2005 20:37:43 -0500
Subject: variable declaration
In-Reply-To: <E5mdnWoOkv2mXGLcRVn-gw@telcove.net>
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<uImdnUAKxbKaFWPcRVn-2A@telcove.net>
	<1107205410.367521.50490@f14g2000cwb.googlegroups.com>
	<44SdnUZGopnrAWLcRVn-pg@telcove.net>
	<41FFAE20.7030802@holdenweb.com>
	<E5mdnWoOkv2mXGLcRVn-gw@telcove.net>
Message-ID: <OeWLd.102535$Jk5.61358@lakeread01>

Thomas Bartkus wrote:

> "Steve Holden" <steve at holdenweb.com> wrote in message
> news:41FFAE20.7030802 at holdenweb.com...
> 
>>Thomas Bartkus wrote:
>>
>>
>>>"Carl Banks" <invalidemail at aerojockey.com> wrote in message
>>>news:1107205410.367521.50490 at f14g2000cwb.googlegroups.com...
>>><snip>
>>>
>>>>How common is it for a local variable to be bound in
>>>>more than one place within a function?
>>>
>>>
>>>How common?  It shouldn't happen at all and that was the point.
>>
>>This seems a little excessive to me. Sample use case:
>>
>>for something in lst:
>>   if type(something) != type(()):
>>     something = tuple(something)
> 
> 
> Hhhmmh!
> I presume you are going through the list and want to gaurantee that every
> item you encounter is a tuple!  So if it ain't - you just re-declare
> "something" to be a tuple. What was formerly a single string, integer,
> whathaveyou is now a tuple *containing* a single string, integer,
> whathaveyou.
> 
> Do you do it that way because you can? Or  because you must?
>    And
> If the former - is it a good idea?
> OR did I just miss your codes intent completely?
> 
I suspect you missed the intent completely.

> My first inclination would be to create a new variable (type = tuple) and
> accept (or typecast) each "something" into it as required. The notion that

OK, but if you do that then surely the loop looks like

for something in lst:
     somethingElse = something
     if type(somethingElse) != type(()):
         somethingElse = ...

> you just morph "something" still seems rather abhorrent. It hadn't occurred
> to me that iterating through a list like that means the iterater "something"
> might need to constantly morph into a different type according to a lists
> possibly eclectic contents.
> 
Now I suspect I'm missing *your* point.

> It might explain why the interpreter is incapable of enforcing a type.  It
> would forbid iterating through lists containing a mix of different types.
> EXCEPT- I must note, that other languages manage to pull off exactly such a
> trick with a variant type. When you need to pull off a feat such as this,
> you declare a variant type where the rules are relaxed *for that situation
> only* and there is no need to toss the baby out with the bathwater.
> 
Well I have to say that the longer I program (and I've been at it nearly 
forty years now) the more I am convinced that type declarations don't 
actually help. I can see their value in terms of code optimization, but 
there is no way that I see them as an error-detection mechanism. "You 
have tried to assign a string to an integer variable" just isn't a 
mistake I make a lot.

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005          http://www.python.org/pycon/2005/
Steve Holden                           http://www.holdenweb.com/


From zorro at chez.com  Fri Feb  4 15:40:06 2005
From: zorro at chez.com (jb)
Date: Fri, 4 Feb 2005 21:40:06 +0100
Subject: How to enable Python Scripts with MS IIS Web Server?
References: <1107531390.688583.231970@l41g2000cwc.googlegroups.com>
Message-ID: <4203dda7$0$491$626a14ce@news.free.fr>

hi,

    you should first install win32all : 
http://starship.python.net/crew/mhammond/

    next, 2 ways 2 proceed, but the first is the easier :

    you make a "test.asp" page in the folder

    at the top, you write <@Language=Python%>

    a line below : <%Response.Write("Hello World")%>

    try if the page works well. if it works then your python/iis install is 
ok

    the second way is to keep the .py extension and to associate it with the 
python executable

    http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B276494

hope this helps


juju



<syed_saqib_ali at yahoo.com> a ?crit dans le message de news: 
1107531390.688583.231970 at l41g2000cwc.googlegroups.com...
>
>
>
> Hi. I have MS Windows Server 2003, Enterprise Edition.
> It has MS Management Console 2.0, Version 5.2
> and IIS Manager 6.0
>
>
>
> I have a directory called "myDirs". Within this directory are 2 files:
> 1) index.pl (a perl script)
> 2) index.py (a python script whose first line is
> "#!C:\Python21\pythonw.exe")
>
> The webserver is listening on port 8080.
>
> When I point my browser to http://localhost:8080/myDirs/index.pl, it
> works... I see the output of the perl script.
>
> HOWEVER,
> When I point my browser to http://localhost:8080/myDirs/index.py, it
> simply shows the python file as text. It doesn't interpret it at all.
>
> How Can I get it to interpret the python file using the interpreter and
> display the output in the browser?
>
> Please explain each step in careful/excruciating detail because I'm a
> windows Newbie.
>
>
> -Saqib Ali
> 




From steven.bethard at gmail.com  Thu Feb 17 15:09:42 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 17 Feb 2005 13:09:42 -0700
Subject: How to wrap a class's methods?
In-Reply-To: <4214f167$0$44618$a1866201@visi.com>
References: <4214f167$0$44618$a1866201@visi.com>
Message-ID: <lcSdnQIG9cWZZ4nfRVn-vw@comcast.com>

Grant Edwards wrote:
> I want to subclass an IMAP connection so that most of the
> methods raise an exception if the returned status isn't 'OK'.
> This works, but there's got to be a way to do it that doesn't
> involve so much duplication:
> 
> class MyImap4_ssl(imaplib.IMAP4_SSL):
> 
>     def login(*args):
>         s,r = imaplib.IMAP4_SSL.login(*args)
>         if s!='OK':
>             raise NotOK((s,r))
>         return r
>         
>     def list(*args):
>         s,r = imaplib.IMAP4_SSL.list(*args)
>         if s!='OK':
>             raise NotOK((s,r))
>         return r
>         
>     def search(*args):
>         s,r = imaplib.IMAP4_SSL.search(*args)
>         if s!='OK':
>             raise NotOK((s,r))
>         return r
>         
>     [and so on for another dozen methods]

A more tested version of my other email:

py> class C(object):
...     def f(self, *args):
...         print "f:", args
...     def g(self, *args):
...         print "g:", args
...
py> class D(C):
...     pass
...
py> class Wrapper(object):
...     def __init__(self, func):
...         self.func = func
...     def __call__(self, *args):
...         print "wrapped"
...         return self.func(*args)
...
py> for name in ['f', 'g']:
...     wrapper = Wrapper(getattr(C, name))
...     setattr(D, name, new.instancemethod(wrapper, None, D))
...
py> C().f()
f: ()
py> C().g(1)
g: (1,)
py> D().f()
wrapped
f: ()
py> D().g(1)
wrapped
g: (1,)


From jerf at jerf.org  Thu Feb  3 20:18:27 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 03 Feb 2005 20:18:27 -0500
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
	<7xy8e5jagh.fsf@ruckus.brouhaha.com>
	<pan.2005.02.03.23.34.45.544501@jerf.org>
	<7xis59nd2v.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2005.02.04.01.18.27.488186@jerf.org>

On Thu, 03 Feb 2005 20:50:16 -0800, Paul Rubin wrote:
> I understood the Twisted suggestion as meaning avoiding database
> traffic by keeping both user and server state resident in the
> application.  Yes, if you use a database for that, you get multiple
> app servers instead of a heavily loaded centralized one.  But you now
> have a heavily loaded centralized database server instead.  You
> haven't really solved your scaling problem, you've just moved it back
> a layer.

True, but my understanding is that there are load balancing solutions for
database servers too, so in this case moving the problem back one level
actually can be progress.

But I have no experience with this, so I have no idea how well it works.



From alanmk at hotmail.com  Wed Feb  2 12:25:43 2005
From: alanmk at hotmail.com (Alan Kennedy)
Date: Wed, 02 Feb 2005 17:25:43 +0000
Subject: Suggesion for an undergrad final year project in Python
In-Reply-To: <1107241918.722156.123590@c13g2000cwb.googlegroups.com>
References: <1107241918.722156.123590@c13g2000cwb.googlegroups.com>
Message-ID: <__7Md.46809$Z14.30635@news.indigo.ie>

[Sridhar]
> I am doing my undergrade CS course.  I am in the final year, and would
> like to do my project involving Python.  Our instructors require the
> project to have novel ideas.  Can the c.l.p people shed light on this
> topic?

PyPy is chock full of novel ideas, given that two of the main developers 
are Armin Rigo (of psyco fame) and Christian Tismer (stackless python).

PyPy is a project, which has obtained European funding, to reimplement 
python *in python*, a very laudable goal.

http://codespeak.net/pypy/

Psyco is a "specialising compiler" for cpython, which essentially does 
something like just-in-time compilation, but with a different slant.

http://psyco.sourceforge.net/introduction.html

Armin's paper on the techniques used should make an interesting read for 
your CS professors:

http://psyco.sourceforge.net/theory_psyco.pdf

Stackless python has support for full coroutines, as opposed to 
cpython's current support for semi-coroutines. In the past, Stackless 
used to support continuations, but no longer does because of the 
complexity of adapting the cpython interpreter to support them. But 
Christian's implementation experience will hopefully guide PyPy in the 
direction of supporting both coroutines and continuations.

http://www.stackless.com/

As for what you could do in the PyPy project, I have no suggestions 
since I am not involved in the project. But I am sure that a message to 
pypy-dev will elicit plenty of ideas.

http://codespeak.net/mailman/listinfo/pypy-dev

Lastly, the jython project is undergoing a bit of renaissance at the 
moment, and there's plenty of work to be done. A message to jython-dev 
volunteering time is unlikely to go unnoticed. Particularly, the parser, 
code generation and AST are areas which require a fair amount of rework. 
But there is less opportunity to use "novel ideas" in jython, so it may 
not interest your professors, unless you have some novel ideas of your 
own to bring to the project.

http://lists.sourceforge.net/lists/listinfo/jython-dev

How much time, over how long a period, do you have available for your 
project?

Best of luck,

-- 
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan


From renelt at web.de  Sun Feb 27 11:21:09 2005
From: renelt at web.de (Alex Renelt)
Date: Sun, 27 Feb 2005 17:21:09 +0100
Subject: any Python equivalent of Math::Polynomial::Solve?
In-Reply-To: <just-5C6FB9.11103127022005@news1.news.xs4all.nl>
References: <just-420C1F.16423926022005@news1.news.xs4all.nl>
	<1109485184.587035.176540@l41g2000cwc.googlegroups.com>
	<just-5C6FB9.11103127022005@news1.news.xs4all.nl>
Message-ID: <38e9nqF5ndqt9U1@individual.net>

Just wrote:
> In article <1109485184.587035.176540 at l41g2000cwc.googlegroups.com>,
>  "Carl Banks" <invalidemail at aerojockey.com> wrote:

>>It should be pretty easy to set up a Numeric matrix and call
>>LinearAlgebra.eigenvalues.  For example, here is a simple quintic
>>solver:
>>
>>. from Numeric import *
>>. from LinearAlgebra import *
>>.
>>. def quinticroots(p):
>>.     cm = zeros((5,5),Float32)
>>.     cm[0,1] = cm[1,2] = cm[2,3] = cm[3,4] = 1.0
>>.     cm[4,0] = -p[0]
>>.     cm[4,1] = -p[1]
>>.     cm[4,2] = -p[2]
>>.     cm[4,3] = -p[3]
>>.     cm[4,4] = -p[4]
>>.     return eigenvalues(cm)
>>
>>
>>now-you-can-find-all-five-Lagrange-points-ly yr's,
> 
> 
> Wow, THANKS. This was the answer I was secretly hoping for... "Great 
> need for speed", no, not really, but this Numeric-based version is about 
> 9 times faster than what I translated from Perl code yesterday, so from 
> where I'm standing your version is blazingly fast...
> 
> Thanks again,
> 
> Just

in addition:
I'm writing a class for polynomial manipulation. The generalization of 
the above code is:

definitions:
1.) p = array([a_0, a_i, ..., a_n]) represents your polynomial
P(x) = \sum _{i=0} ^n a_i x^i

2.) deg(p) is its degree

3.) monic(p) makes P monic, i.e. monic(p) = p / p[:-1]

then you get:
from numarray import *
import numarray.linear_algebra as la

def roots(p):
	p = monic(p); n = deg(p)
	M = asarray(zeros((n,n)), typecode = 'f8')
# or 'c16' if you need complex coefficients
	M[:-1,1:] = identity(n-1)
	M[-1,:] = -p[:-1]
	return la.eigenvalues(M)

Alex


From ole.anders.walseth at telemed.no  Mon Feb 14 09:30:16 2005
From: ole.anders.walseth at telemed.no (oleaw)
Date: Mon, 14 Feb 2005 09:30:16 -0500
Subject: Problem using win32com
References: <ac6548cbb0a5423510758fc94cd067d6@localhost.talkaboutprogramming.com>
Message-ID: <5dfea5a0c5ca0d0e6b20692e26534d79@localhost.talkaboutprogramming.com>

I am having a similar problem with a com+ API created in delphi. is this a
win32com problem?






From bvande at po-box.mcgill.ca  Sat Feb  5 20:34:51 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Sat, 05 Feb 2005 20:34:51 -0500
Subject: Definitive documentation on newstyle classes? (WAS: Pickling
 and	inheritance are making me hurt)
In-Reply-To: <1d6cdae305020516467620aa0@mail.gmail.com>
References: <1d6cdae305020516467620aa0@mail.gmail.com>
Message-ID: <4205743B.4060100@po-box.mcgill.ca>

Daniel Bickett said unto the world upon 2005-02-05 19:46:
> I was reading the "Pickling and inheritance are making me hurt"
> thread, and the latest suggestion (as of this posting) was to do with
> the __setstate__ and __getstate__ methods. They caught my attention
> because I hadn't encountered them before, and it reminded me that in
> the past I've never been able to very good, definitive documentation
> on newstyle classes. Googling for it gives little python tutorials on
> various sites, and even searching this newsgroup returns very specific
> questions, as a rule.
> 
> Alas, the question: Does there exist a page that enumerates all of the
> features of the newstyle classes, and explains what they all do? If
> so, can anyone provide me with such a link?
> 
> Thanks :-)

Hi Daniel,

it doesn't yet answer the "definitive" part, but
<http://www.python.org/moin/NewClassVsClassicClass> is worth a look.

Best,

Brian vdB


From steven.bethard at gmail.com  Mon Feb 21 00:47:31 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 20 Feb 2005 22:47:31 -0700
Subject: help please
In-Reply-To: <basi11d8pfakn8gkmmb91ma87t2na6hs00@4ax.com>
References: <Z4ydnbKMDLVvEJLfRVn-hA@comcast.com>
	<1108324679.451793.147890@z14g2000cwz.googlegroups.com>
	<i_ydnb41nJ68IZLfRVn-gw@comcast.com>
	<1108329540.239064.144920@f14g2000cwb.googlegroups.com>
	<j7udnc1ZGqsAUZLfRVn-3w@comcast.com>
	<1108334012.336816.221460@g14g2000cwa.googlegroups.com>
	<joSdnbH-qqzBZpLfRVn-tg@comcast.com>
	<1108921146.274248.11500@g14g2000cwa.googlegroups.com>
	<hbydnV4bvrCxcIXfRVn-1w@comcast.com>
	<1108959170.585091.202240@z14g2000cwz.googlegroups.com>
	<basi11d8pfakn8gkmmb91ma87t2na6hs00@4ax.com>
Message-ID: <uN-dnREnJJly6ITfRVn-ig@comcast.com>

Dennis Lee Bieber wrote:
> On 20 Feb 2005 20:12:50 -0800, "gargonx" <gargonx at gmail.com> declaimed
> the following in comp.lang.python:
> 
>>>>>decode_replacements.update([(std[key], key) for key in std])
>>
>>Traceback (most recent call last):
>>  File "<stdin>", line 1, in ?
>>AttributeError: keys
> 
> 	Did you read the reference manual?

Yes, actually.  But I generally check only the reference manual for the 
current version of Python:

http://docs.python.org/lib/typesmapping.html

which does support sequence arguments for dict.update.  As noted there, 
of course, this support was added for Python 2.4.

STeVe


From dontwant at spam.com  Sat Feb 12 23:01:43 2005
From: dontwant at spam.com (Courageous)
Date: Sat, 12 Feb 2005 20:01:43 -0800
Subject: Kill GIL
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<1107964587.818199.223980@g14g2000cwa.googlegroups.com>
	<mailman.2254.1107966236.22381.python-list@python.org>
	<7xr7jlwieq.fsf@ruckus.brouhaha.com>
	<cum62t$3fb$1@panix2.panix.com>
	<mailman.2463.1108256227.22381.python-list@python.org>
	<868y5t6sal.fsf@guru.mired.org>
Message-ID: <50kt01l2tmi712hb07jicpgqru6s8pqtoc@4ax.com>


>Here here. I find that threading typically introduces worse problems
>than it purports to solve.

I recently worked on a software effort, arguably one of the most
important software efforts in existence, in which individuals
responsible for critical performance of the application threw
arbitrarily large numbers of threads at a problem, on a multi
processor machine, on a problem that was intrinsically IO-bound.

The ease with which one can get into problems with threads (and
these days, also with network comms) leads to many problems if
the engineers aren't acquainted sufficiently with the theory.

Don't get me started on the big clusterfucks I've seen evolve
from CORBA...

C//



From jerf at jerf.org  Fri Feb  4 08:01:16 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 04 Feb 2005 08:01:16 -0500
Subject: returning True, False or None
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
Message-ID: <pan.2005.02.04.13.01.15.184510@jerf.org>

On Fri, 04 Feb 2005 10:48:44 -0700, Steven Bethard wrote:

> I have lists containing values that are all either True, False or None, 
> e.g.:
> 
>      [True,  None,  None,  False]
>      [None,  False, False, None ]
>      [False, True,  True,  True ]
>      etc.
> 
> For a given list:
> * If all values are None, the function should return None.
> * If at least one value is True, the function should return True.
> * Otherwise, the function should return False.
> 
> Right now, my code looks like:
> 
>      if True in lst:
>          return True
>      elif False in lst:
>          return False
>      else:
>          return None

Yes, I see the smell, you are searching the list multiple times. You
could bail out when you can:

seenFalse = False
for item in list:
	if item: return True
	if item is False: seenFalse = True
if seenFalse:
	return False
return None

But I'd submit that if four item lists are your common case, that your
original code is significantly easier to understand what it is doing. This
can be alleviated with an appropriate comment on the chunk of code I gave
you, though.



From steven.bethard at gmail.com  Sun Feb 27 20:12:17 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 27 Feb 2005 18:12:17 -0700
Subject: string methods (warning, newbie)
In-Reply-To: <mailman.3111.1109477697.22381.python-list@python.org>
References: <A7B5C22F20EE3C4E95744E2F03F1887F380869@MAYOR.retzlaff.com>
	<mailman.3111.1109477697.22381.python-list@python.org>
Message-ID: <-_KdnbUPBttz8r_fRVn-ow@comcast.com>

Nick Coghlan wrote:
> Jimmy Retzlaff wrote:
> 
>> The approach you are considering may be easier than you think:
>>
>>>>> filter(str.isalpha, 'The Beatles - help - 03 - Ticket to ride')
>>
>> 'TheBeatleshelpTickettoride'
> 
> Hmm, I think this is a case where filter is significantly clearer than 
> the equivalent list comprehension:
> 
> Py> "".join([c for c in 'The Beatles - help - 03 - Ticket to ride' if 
> c.isalpha(
> )])
> 'TheBeatleshelpTickettoride'

On the other hand, filter doesn't do the same thing:

py> s = u'The Beatles - help - 03 - Ticket to ride'
py> filter(str.isalpha, s)
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
TypeError: descriptor 'isalpha' requires a 'str' object but received a 
'unicode'
py> ''.join(c for c in s if c.isalpha())
u'TheBeatleshelpTickettoride'

Ideally, you could use something like basestring.isalpha and have it 
work for both str and unicode, but no such luck. =)

STeVe


From rNOSPAMon at flownet.com  Wed Feb 16 11:34:55 2005
From: rNOSPAMon at flownet.com (Ron Garret)
Date: Wed, 16 Feb 2005 08:34:55 -0800
Subject: supress creation of .pyc files
References: <pan.2005.02.16.13.53.22.459631@thomas-guettler.de>
Message-ID: <rNOSPAMon-5CBB48.08345516022005@news.gha.chartermi.net>

In article <pan.2005.02.16.13.53.22.459631 at thomas-guettler.de>,
 Thomas Guettler <guettli at thomas-guettler.de> wrote:

> Hi,
> 
> Is there a way to import a file without creating
> a .pyc file?
> 
> Of course you can delete the pyc in my script after
> the import statement, but maybe there is a switch
> that I have not found yet.
> 
> The imported file is a config file, not a script.
> 
> Thomas

If you're on unix, you can put the .py files you want to import in a new 
directory, then change the permissions on this directory so that you do 
not have write permission for it.

rg


From harlinseritt at yahoo.com  Fri Feb 25 07:33:31 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 25 Feb 2005 04:33:31 -0800
Subject: Trees
In-Reply-To: <mailman.3035.1109311254.22381.python-list@python.org>
References: <mailman.3035.1109311254.22381.python-list@python.org>
Message-ID: <1109334810.991970.280350@l41g2000cwc.googlegroups.com>

Would this be for a GUI toolkit or maybe using a standard class scheme?



From jussij at zeusedit.com  Mon Feb  7 09:25:06 2005
From: jussij at zeusedit.com (Jussi Jumppanen)
Date: Tue, 08 Feb 2005 01:25:06 +1100
Subject: WYSIWYG wxPython "IDE"....?
References: <1107560658.584623.303310@o13g2000cwo.googlegroups.com>
	<4205fcd9@news.highway1.com.au>
	<1107751731.066796.295170@g14g2000cwa.googlegroups.com>
	<cu7hcf$1ek$1@online.de>
	<47pe019efj34ua4o5pjjarlv3i85pa9048@4ax.com>
Message-ID: <42077A42.6D22@zeusedit.com>

Luke Skywalker wrote:

> To me, the very fact that the only solution if you don't want 
> to carry a multi-megabyte widget set with you (either wxWidgets 
> or QT is to go the MFC way (which a lot of C developers seem 
> to hate) through

Have you ever tried to use MFC in anything other than a 
simple application? 

MFC is nothing more than a poorly designed C++ layer over the 
Windows Win32 API. One of it's greatest contributions to the 
world of software development is it clearly demonstrates how 
NOT to design a C++ application framework. 

At least wxWidgets does offer an OOP look and feel, which is 
no simple task given that wxWidgets is also a multi-platform 
application framework.

Add to this the fact that MFC is no longer supported by 
Microsoft (ie there will be no ew version or bug fixes for 
future versions of Windows) and the choice is simple. I 
would definitely not be choosing MFC.

Jussi Jumppanen
Author of: Zeus for Windows (New version 3.93 out now)
"The C/C++, Cobol, Java, HTML, Python, PHP, Perl programmer's editor"
Home Page: http://www.zeusedit.com


From steven.bethard at gmail.com  Sun Feb 13 16:46:03 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 13 Feb 2005 14:46:03 -0700
Subject: builtin functions for and and or?
In-Reply-To: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>
References: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>
Message-ID: <predneqRaKoHV5LfRVn-rg@comcast.com>

Roose wrote:
> I need this a lot: a one line way to do a n-ary and or 'or'.
> 
> e.g.,
> 
> result = True
> for x in L:
>   if not boolean_function(x):
>     result = False
> 
> or
> 
>>>>reduce(operator.__and__, [boolean_function(x) for x in L)

Can you use itertools?

py> def boolfn(x):
...     print "boolfn: %r" % x
...     return bool(x)
...
py> True in itertools.imap(boolfn, ['a', '', 'b'])
boolfn: 'a'
True
py> True in itertools.imap(boolfn, ['', '', ''])
boolfn: ''
boolfn: ''
boolfn: ''
False
py> False in itertools.imap(boolfn, ['a', '', 'b'])
boolfn: 'a'
boolfn: ''
True
py> False in itertools.imap(boolfn, ['a', 'a', 'b'])
boolfn: 'a'
boolfn: 'a'
boolfn: 'b'
False

It even shortcircuits when appropriate.

Steve


From deetsNOSPAM at web.de  Sat Feb 19 09:59:21 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sat, 19 Feb 2005 15:59:21 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr>
Message-ID: <cv7k8e$4pa$03$1@news.t-online.com>

> Should a professional developer take python serious?

Unnecessary and deliberately provoking question - python is taken seriously,
e.g. by multi-billion dollar companies like google and zope. You OTH have
provided no evidence so far that you can be taken seriously as a developer
of whatever kind - neither professional nor hobbyist. So one has to
question the relevance of your demands.
 
> I mean, if the team does not manage at least the foundation of a
> multi-target automated-build-process?

Plain wrong. The team does very well manage that process - for a large
variety of platforms and compilers. Just not the compiler you perceive as
being a necessity. But that dead horse has been beaten enough already.


-- 
Regards,

Diez B. Roggisch


From paddy3118 at netscape.net  Fri Feb 18 05:24:46 2005
From: paddy3118 at netscape.net (Paddy McCarthy)
Date: 18 Feb 2005 02:24:46 -0800
Subject: combining several lambda equations
Message-ID: <2ae25c6b.0502180224.3d6164a7@posting.google.com>

Hi,
I am trying to use eval as little as possible but solve this problem.

#If given:two or more lambda equations
x=lambda : A < B
y=lambda : C+6 >= 7
...

How do I create another lambda expression Z equivalent to 

Z=lambda : (A<B) and (C+6>=7)

# i.e. the anding together of the originals, but without referencing 
# globals x and y as they are artificial in that I will start of with 
# probably a list of lambda equations.

Your help would be appreciated.
Thanks, Paddy.


From http  Wed Feb 16 17:54:30 2005
From: http (Paul Rubin)
Date: 16 Feb 2005 14:54:30 -0800
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<Xns95FFF321AD909PaCmAnRDLM@212.27.42.70>
Message-ID: <7xbrakjeu1.fsf@ruckus.brouhaha.com>

Fred Pacquier <xnews2 at fredp.lautre.net> writes:
> KirbyBase sounds like something that could fit the bill.

Hmm, this looks kind of nice.  However, when used in embedded mode,
the overview blurb doesn't say anything about concurrency control.
I don't want to use it in client/server mode, for reasons already stated.


From mm at newsgroups.com  Sun Feb 13 16:50:27 2005
From: mm at newsgroups.com (MM)
Date: Mon, 14 Feb 2005 10:50:27 +1300
Subject: win32 extension install hiccup
Message-ID: <cuoh3s$87u$1@lust.ihug.co.nz>

Hi,

I downloaded the latest win32all build 202 and tried to install under 
win2000 with Py2.4. Install complains about 'couldn't open py2.4 to run 
script pywin32-preinstall.py'. I checked the directories and there was 
no sign of this file (preinstall.py) so I presume this is why it bombed. 
How do I fix this? Thanks, matthew.


From roy at panix.com  Tue Feb  1 08:17:33 2005
From: roy at panix.com (Roy Smith)
Date: Tue, 01 Feb 2005 08:17:33 -0500
Subject: equivelant of Java's toString() method? (not repr)
References: <WeLLd.29107$B5.4126@fe1.news.blueyonder.co.uk>
Message-ID: <roy-FC0CB2.08173301022005@reader2.panix.com>

Alex Hunsley <lard at tardis.ed.ac.molar.uk> wrote:
> I suppose I'm looking for the equivelant of Java's toString() method...

That would be str(), which for the most part, just calls your object's 
__str__() method.  If your object doesn't have an __str__() method, there's 
nothing magic Python can do to invent one.

The difference between repr() and str() is that repr() is supposed to 
produce a parsable representation of the object; one which could be parsed 
by a Python interpreter to re-generate the original object.  On the other 
hand, str() is supposed to produce a human-readable string.


From aleaxit at yahoo.com  Sun Feb  6 17:36:07 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 6 Feb 2005 23:36:07 +0100
Subject: loops -> list/generator comprehensions
References: <1107718117.221204.80410@l41g2000cwc.googlegroups.com>
	<opsls54qat1js0xs@news.telkomsa.net>
	<4qCdnXI11-vhGJvfRVn-vQ@comcast.com>
	<opsls8buf21js0xs@news.telkomsa.net>
	<asSdncm4c9J1DJvfRVn-gw@comcast.com>
Message-ID: <1grl53q.ee7g9b1m2pfy9N%aleaxit@yahoo.com>

Steven Bethard <steven.bethard at gmail.com> wrote:

> at the OP's original code, the line:
> 
>  [(x[0], x[2]) for x in os.walk(".")]
> 
> is the equivalent of:
> 
>  [dirpath, filenames for dirpath, dirnames, filenames in os.walk('.')]

Just a nit: you need parentheses in your second LC too, i.e.:

 [(dirpath, filenames) for dirpath, dirnames, filenames in os.walk('.')]

> I prefer to give names to the values produced by os.walk -- I think it
> makes the usage much clearer.

Full agreement here -- those numeric indices are nasty.


Alex


From http  Fri Feb  4 22:43:38 2005
From: http (Paul Rubin)
Date: 04 Feb 2005 19:43:38 -0800
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
	<cu0e33$jp6$1@achot.icm.edu.pl>
Message-ID: <7xzmyj8ydx.fsf@ruckus.brouhaha.com>

Maciej Mr?z <tego at adresu.nie.ma> writes:
> Mmcache (which is both optimizer and shared memory caching library for
> php) can do _miracles_. One of my company servers uses Apache
> 1.3/php/mmcache to serve about 100 GB of dynamic content a day (it
> could do more but website does not have enough visitors to stress it
> :) ).

Yeah, that's what Wikipedia is using, I'd forgotten its name.

 http://meta.wikimedia.org/wiki/PHP_caching_and_optimization


> There's also memcached, much more of interest to readers of this list
> iirc it has Python API.

Oh cool, I should look at it.



From vincent at visualtrans.de  Sat Feb 12 03:51:27 2005
From: vincent at visualtrans.de (Vincent Wehren)
Date: Sat, 12 Feb 2005 09:51:27 +0100
Subject: Commerical graphing packages?
In-Reply-To: <420d1595$1@nntp.zianet.com>
References: <420d1595$1@nntp.zianet.com>
Message-ID: <cukg2d$7ub$1@news3.zwoll1.ov.home.nl>

Erik Johnson wrote:
>     I am aware of ChartDirector (http://www.advsofteng.com/ ) which
> explicitly supports python and seems to be about the right level of
> sophistication. I don't really know of any other packages in this space, do
> you? I am seeking feedback and reccomendations from people who have used
> this package or similar ones. I am particularly interested to hear about any
> limitations or problems you ran into with whatever package you are using.

We use both the Python and C++ bindings of ChartDirector (although their 
license always spans /all/ supported bindings. It's all pretty 
straight-forward, well-documented, and the license fee is a bargain 
compared to other packages we've used in the past. What it is not 
suitable for is maybe allowing for 3d-views of data cubes - changeable 
on the fly.

--
Vincent Wehren


From mefjr75 at hotmail.com  Mon Feb  7 00:53:27 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 6 Feb 2005 21:53:27 -0800
Subject: pygame.mixer.music not playing
In-Reply-To: <36ocddF541n0fU1@individual.net>
References: <36mb0iF54udklU1@individual.net>
	<1107700800.258876.298010@z14g2000cwz.googlegroups.com>
	<36mvjkF54gvnrU1@individual.net>
	<1107748705.808825.319270@f14g2000cwb.googlegroups.com>
	<36ocddF541n0fU1@individual.net>
Message-ID: <1107755607.157353.196910@g14g2000cwa.googlegroups.com>

Very cool,
    glad you got it working.
Good job getting it all installed and running so fast.
It won't be long till you have a cool media player of your own.
I have not used PyFMOD yet so can't help with it ( I thought it was
cross platform  too **sigh**, at least FMOD is)
Happy hacking,
M.E.Farmer



From xlii at xlii.org  Thu Feb  3 18:22:11 2005
From: xlii at xlii.org (Dominique O. Martel)
Date: 3 Feb 2005 15:22:11 -0800
Subject: Reinstall python 2.3 on OSX 10.3.5?
References: <1107388080.703032.116150@g14g2000cwa.googlegroups.com>
Message-ID: <1107472931.476716.89840@z14g2000cwz.googlegroups.com>

0) compile and install GNU readline 5.0 with the usual ./configure
method
ftp://ftp.cwru.edu/pub/bash/readline-5.0.tar.gz

1) as an administrator, remove the contents of
"/System/Library/Frameworks/Python.framework"

2) install Python from the standard distribution:
 ./configure --enable-framework=/System/Library/Frameworks
make
sudo make frameworkinstall

3) install the extras in /Applications if you want to:
sudo make frameworkinstallextras
Move them to /Developer/Applications/Utilities/MacPython-2.3

4) remove every python* from /usr/local/bin
Those in /usr/bin/ are OK for Python 2.3

5) replace
"/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages"
with a symbolic link to "/Library/Python/2.3". Name it "site-packages".

I have installed and used Python 2.3.x this way without any problem
whatsoever.



From dalke at dalkescientific.com  Mon Feb 28 19:09:29 2005
From: dalke at dalkescientific.com (Andrew Dalke)
Date: Tue, 01 Mar 2005 00:09:29 GMT
Subject: yield_all needed in Python
References: <lck6osnu68.fsf@gaffa.mit.edu>
Message-ID: <pan.2005.03.01.00.09.48.324678@dalkescientific.com>

On Mon, 28 Feb 2005 18:25:51 -0500, Douglas Alan wrote:
> While writing a generator, I was just thinking how Python needs a
> "yield_all" statement.  With the help of Google, I found a pre-existing
> discussion on this from a while back in the Lightweight Languages
> mailing list.  I'll repost it here in order to improve the chances of
> this enhancement actually happening someday.

You should also have looked for the responses to that. Tim Peter's
response is available from
  http://aspn.activestate.com/ASPN/Mail/Message/624273
as linked from
  http://aspn.activestate.com/ASPN/Mail/Message/python-dev/758572
Here is the most relevant parts.

   I'm not bothered -- this comes with the territory.  If/when
   full-fledged coroutines make it in too, people worried about that can
   use them instead.  Curious fact:  I *was* worried about the worst-case
   time aspects of "simple generators" in Icon years ago, but in practice
   never ever got burned by it. And rewriting stuff to use Icon
   co-expressions instead invariably resulted in messier code that ran
   significantly slower in virtually all cases, except for the ones I
   *contrived* to prove the O() difference.

   BTW, Python almost never worries about worst-case behavior, and people
   using Python dicts instead of, e.g., balanced trees, get to carry their
   shame home with them hours earlier each day <wink> .

				Andrew
				dalke at dalkescientific.com



From jjl at pobox.com  Sat Feb  5 17:58:52 2005
From: jjl at pobox.com (John J. Lee)
Date: 05 Feb 2005 22:58:52 +0000
Subject: How do I enter/receive webpage information?
References: <1107560030.834943.174250@f14g2000cwb.googlegroups.com>
	<slrnd0a171.rr5.jgrahn-nntq@frailea.sa.invalid>
Message-ID: <87oeeywr4j.fsf@pobox.com>

Jorgen Grahn <jgrahn-nntq at algonet.se> writes:
[...]
> I did it this way successfully once ... it's probably the wrong approach in 
> some ways, but It Works For Me.
> 
> - used httplib.HTTPConnection for the HTTP parts, building my own requests
>   with headers and all, calling h.send() and h.getresponse() etc.
> 
> - created my own cookie container class (because there was a session
>   involved, and logging in and such things, and all of it used cookies)
> 
> - subclassed sgmllib.SGMLParser once for each kind of page I expected to
>   receive. This class knew how to pull the information from a HTML document,
>   provided it looked as I expected it to.  Very tedious work. It can be easier
>   and safer to just use module re in some cases.
> 
> Wrapped in classes this ended up as (fictive):
> 
> client = Client('somehost:80)
> client.login('me', 'secret)
> a, b = theAsAndBs(client, 'tomorrow', 'Wiltshire')
> foo = theFoo(client, 'yesterday')
> 
> I had to look deeply into the HTTP RFCs to do this, and also snoop the
> traffic for a "real" session to see what went on between server and client.

I see little benefit and significant loss in using httplib instead of
urllib2, unless and until you get a particulary stubborn problem and
want to drop down a level to debug.  It's easy to see and modify
urllib2's headers if you need to get low level.

One starting point for web scraping with Python:

http://wwwsearch.sourceforge.net/bits/GeneralFAQ.html

There are some modules you may find useful there, too.

Google Groups for urlencode.  Or use my module ClientForm, if you
prefer.  Experiment a little with an HTML form in a local file and
(eg.) the 'ethereal' sniffer to see what happens when you click
submit.

The stdlib now has cookie support (in Python 2.4):

import cookielib, urllib2
cj = cookielib.CookieJar()
opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))

r = opener.open("http://example.com/")
print r.read()

Unfortunately, it's true that network sniffing and a reasonable
smattering of knowledge about HTTP &c., does often turn out to be
necessary to scrape stuff.  A few useful tips:

http://wwwsearch.sourceforge.net/ClientCookie/doc.html#debugging


John


From fperez.net at gmail.com  Sat Feb 12 18:45:29 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Sat, 12 Feb 2005 16:45:29 -0700
Subject: Hack with os.walk()
References: <200502120000.12086.frans.englich@telia.com>	<culqu5$582$1@sea.gmane.org>
	<mailman.2455.1108248801.22381.python-list@python.org>
	<cum2ud$61u$1@news1.ucsd.edu>
Message-ID: <cum4b9$ibi$1@sea.gmane.org>

Robert Kern wrote:

> Fernando Perez wrote:
> 
>> Perhaps this path.py could be considered for inclusion in the stdlib?  I've
>> only
>> read the page linked above, so perhaps it can use some polishing.  But it
>> certainly looks like a big improvement over the scatterblast which the stdlib
>> is on this particular topic.
> 
> I'm pretty sure this has been discussed at some point. I completely
> forget the results of said discussion (except the part where it wasn't
> going in yet, although you can't really call that "remembering" so much
> as "deducing from the current state of affairs").

It's probably one of those things which is not enough of a bother for anyone to
stop and commit the effort to fix it.  After all, working around the problem
isn't that hard, since all the functions are there (somewhere), and their poor
interfaces can typically be lived with.  But the code examples in path.py
really feel like a breath of (pythonic) fresh air compared to the stdlib in
this regard.

Care to champion it ? ;)

Best,

f



From ilias at lazaridis.com  Tue Feb 15 10:56:19 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 17:56:19 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <CmhvEE2UBTECFwBc@objmedia.demon.co.uk>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq1he$cd7$1@news1.ucsd.edu>
	<cuq5du$k7g$1@usenet.otenet.gr>
	<Xn86U7RhrLECFwD4@objmedia.demon.co.uk>
	<cur8m5$g8h$1@news.freedom2surf.net>
	<CmhvEE2UBTECFwBc@objmedia.demon.co.uk>
Message-ID: <cut631$ovt$1@usenet.otenet.gr>

Stephen Kellett wrote:
> In message <cur8m5$g8h$1 at news.freedom2surf.net>, Steve Horsley 
> <shoot at the.moon> writes
> 
>> Stephen Kellett wrote:
>>
>>>> Who's "Guido"?
>>>
>>>   LOL Falling off my chair!!!!!!
>>
>> I think the expression you are looking for is ROFL!
> 
> :-) Yes, but with that I could've been standing up before ending up on 
> the floor. I wrote it as I felt it!. Its a really good demonstration as 
> to the depth of the research performed by Illias.

I thin I understand what you mean.

"Guido van Rossum is the project's lead developer. In recognition of 
this role, he's sometimes jokingly called the Benevolent Dictator For 
Life, or BDFL; the acronym is occasionally used in python-dev postings, 
especially in a context such as "making that change will require a BDFL 
pronouncement". In theory the BDFL makes all the decisions about what 
goes in to Python and what doesn't. "
source: http://www.python.org/dev/process.html

> I'm waiting for the "Who's Matz?" comment in comp.lang.ruby....
> 
> Stephen

.

-- 
http://lazaridis.com


From sjmachin at lexicon.net  Thu Feb 24 22:33:50 2005
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 25 Feb 2005 14:33:50 +1100
Subject: [perl-python] generic equivalence partition
References: <1109245733.261643.219420@f14g2000cwb.googlegroups.com>
	<mailman.3028.1109296136.22381.python-list@python.org>
Message-ID: <no6t11dqslohmn6gpes08dgb0iecngo7mg@4ax.com>

On Thu, 24 Feb 2005 17:48:47 -0800, Bryan <belred at gmail.com> wrote:

>Xah Lee wrote:
>> another functional exercise with lists.
>> 
>> Here's the perl documentation. I'll post a perl and the translated
>> python version in 48 hours.
>> 
>> =pod
>> 
>> parti(aList, equalFunc)
>> 
>> given a list aList of n elements, we want to return a list that is a
>> range of numbers from 1 to n, partition by the predicate function of
>> equivalence equalFunc. (a predicate function is a function that
>> takes two arguments, and returns either True or False.)

[snip]

>> example:
>> parti([['x','x','x','1'],
>> ['x','x','x','2'],
[snip]
>> ['x','x','x','5']], sub {$_[0]->[3] == $_[1]->[3]} )
>> 
>> returns
>>  [[1],['2','3','4'],['5'],['6'],['7','8']];
>> 
>> =cut
>> 
>> In the example given, the input list's elements are lists of 4
>> elements, and the equivalence function is one that returns True if the
>> last item are the same.
>
[snip]

>> 
>
>this is the first thing that came to my mind.  i'm sure there are more clever 
>ways to do this.
>
>elements = [['x', 'x', 'x', '1'],
[snip]
>             ['x', 'x', 'x', '5']]
>pos = {}
>
>for i, element in enumerate(elements):
>     pos.setdefault(element[-1], []).append(i+1)
>
>p = pos.values()
>p.sort()
>[[1], [2, 3, 4], [5], [6], [7, 8]]
>
>

Bryan: Bzzzt. Xah was proposing a GENERAL function. You have HARDWIRED
his (simplistic) example.

Xah: Bzzzt. Too close to your previous exercise.






From sjmachin at lexicon.net  Sun Feb 20 15:35:25 2005
From: sjmachin at lexicon.net (John Machin)
Date: 20 Feb 2005 12:35:25 -0800
Subject: exercise: partition a list by equivalence
In-Reply-To: <mailman.2856.1108900770.22381.python-list@python.org>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<1108814276.680736.264380@l41g2000cwc.googlegroups.com>
	<1108849063.857663.279920@c13g2000cwb.googlegroups.com>
	<mailman.2856.1108900770.22381.python-list@python.org>
Message-ID: <1108931725.251996.56210@c13g2000cwb.googlegroups.com>


Eric Pederson wrote:
> > From: "Xah Lee" <xah at xahlee.org>
> > ?    for group in interm:
> what do the funny little "?"s stand for?

...>>> import unicodedata as ucd; ucd.name('?'.decode('cp1252'))
'COPYRIGHT SIGN'

Xah is asserting his right to be recognised as the author of his
artistic creations, line by line.



From jgrahn-nntq at algonet.se  Sat Feb  5 12:41:25 2005
From: jgrahn-nntq at algonet.se (Jorgen Grahn)
Date: 5 Feb 2005 17:41:25 GMT
Subject: How do I enter/receive webpage information?
References: <1107560030.834943.174250@f14g2000cwb.googlegroups.com>
Message-ID: <slrnd0a171.rr5.jgrahn-nntq@frailea.sa.invalid>

On 4 Feb 2005 15:33:50 -0800, Mudcat <mnations at gmail.com> wrote:
> Hi,
> 
> I'm wondering the best way to do the following.
> 
> I would like to use a map webpage (like yahoo maps) to find the
> distance between two places that are pulled in from a text file. I want
> to accomplish this without displaying the browser.

That's called "web scraping", in case you want to Google for info.

> I am looking at several options right now, including urllib, httplib,
> packet trace, etc. But I don't know where to start with it or if there
> are existing tools that I could incorporate.
> 
> Can someone explain how to do this or point me in the right direction?

I did it this way successfully once ... it's probably the wrong approach in 
some ways, but It Works For Me.

- used httplib.HTTPConnection for the HTTP parts, building my own requests
  with headers and all, calling h.send() and h.getresponse() etc.

- created my own cookie container class (because there was a session
  involved, and logging in and such things, and all of it used cookies)

- subclassed sgmllib.SGMLParser once for each kind of page I expected to
  receive. This class knew how to pull the information from a HTML document,
  provided it looked as I expected it to.  Very tedious work. It can be easier
  and safer to just use module re in some cases.

Wrapped in classes this ended up as (fictive):

client = Client('somehost:80)
client.login('me', 'secret)
a, b = theAsAndBs(client, 'tomorrow', 'Wiltshire')
foo = theFoo(client, 'yesterday')

I had to look deeply into the HTTP RFCs to do this, and also snoop the
traffic for a "real" session to see what went on between server and client.

/Jorgen

-- 
  // Jorgen Grahn <jgrahn@       Ph'nglui mglw'nafh Cthulhu
\X/                algonet.se>   R'lyeh wgah'nagl fhtagn!


From HotHOT2 at comcast.net  Sun Feb 13 16:54:50 2005
From: HotHOT2 at comcast.net (Hottime)
Date: Sun, 13 Feb 2005 16:54:50 -0500
Subject: [FREE!] Swingers Websites!                    U@wvqqN
Message-ID: <L-ednSVgss64oY3fRVn-vg@comcast.com>

          .
----------------------------------

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http://www.youandmeswing.com/index.php?ref_id=130


----------------------------------






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From johann at rocholl.net  Wed Feb  9 17:45:05 2005
From: johann at rocholl.net (Johann C. Rocholl)
Date: Wed, 9 Feb 2005 23:45:05 +0100
Subject: Python and version control
In-Reply-To: <3A81C87DC164034AA4E2DDFE11D258E33983C0@exchange.hqamor.amorhq.net>
References: <3A81C87DC164034AA4E2DDFE11D258E33983C0@exchange.hqamor.amorhq.net>
Message-ID: <20050209224505.GA5040@rocholl.net>

Robert Brewer wrote:
> Peter Hansen wrote:
> > Carl wrote:
> > > What is the ultimate version control tool for Python if you 
> > > are working in a Windows environment? 
> > 
> > I never liked coupling the two together like that.  Instead
> > I use tools like TortoiseCVS or (now) TortoiseSVN with a
> > Subversion repository.  These things let you access revision
> > control features from context (right-button) menus right in
> > Windows Explorer, as you browse the file system.
> 
> Seconded.

Thirded.

Johann


From captainrobbo at gmail.com  Thu Feb 24 17:26:22 2005
From: captainrobbo at gmail.com (Andy Robinson)
Date: 24 Feb 2005 14:26:22 -0800
Subject: pyGoogle is fun and easy to use,
	and thinks Python is the best programming language
In-Reply-To: <1109040859.816948.70120@o13g2000cwo.googlegroups.com>
References: <1109040859.816948.70120@o13g2000cwo.googlegroups.com>
Message-ID: <1109283982.638516.325370@o13g2000cwo.googlegroups.com>

Regrettably, inserting "Visual Basic" into the list produces a
different winner.  I think you want some very subtle hard coding which
limits it to on-space-delimited languages :-(

- Andy



From peter at engcorp.com  Wed Feb  9 17:43:35 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 09 Feb 2005 17:43:35 -0500
Subject: convert list of tuples into several lists
In-Reply-To: <_cWdnZN4wO418pffRVn-qA@comcast.com>
References: <cud40u$vqb$01$1@news.t-online.com>
	<36uihlF58p63iU1@individual.net>
	<_cWdnZN4wO418pffRVn-qA@comcast.com>
Message-ID: <XL6dnRJrPeesD5ffRVn-uw@powergate.ca>

Steven Bethard wrote:
> Diez B. Roggisch wrote:
> 
>> zip(*[(1,4),(2,5),(3,6)])
> 
> While this is also the approach I would use, it is worth noting that 
> Guido thinks of this as an abuse of the argument passing machinery:
> 
> http://mail.python.org/pipermail/python-dev/2003-July/037346.html

I'm not sure that's the same thread I already read where he
dissed zip like that, but what I'm wondering is what is the
alternative?  Is there an equally elegant approach that
doesn't "abuse" the argument passing machinery?

-Peter


From crosseyedpenguin at cox.net  Thu Feb 10 17:32:24 2005
From: crosseyedpenguin at cox.net (Roger)
Date: Thu, 10 Feb 2005 15:32:24 -0700
Subject: Python and version control
In-Reply-To: <mailman.2279.1107989113.22381.python-list@python.org>
References: <3A81C87DC164034AA4E2DDFE11D258E33983C0@exchange.hqamor.amorhq.net>
	<mailman.2279.1107989113.22381.python-list@python.org>
Message-ID: <420BE0F8.10004@cox.net>

Johann C. Rocholl wrote:
> Robert Brewer wrote:
> 
>>Peter Hansen wrote:
>>
>>>Carl wrote:
>>>
>>>>What is the ultimate version control tool for Python if you 
>>>>are working in a Windows environment? 
>>>
>>>I never liked coupling the two together like that.  Instead
>>>I use tools like TortoiseCVS or (now) TortoiseSVN with a
>>>Subversion repository.  These things let you access revision
>>>control features from context (right-button) menus right in
>>>Windows Explorer, as you browse the file system.
>>
>>Seconded.
> 
> 
> Thirded.
> 
> Johann

Fourth-ed!

Roger




From pink at odahoda.de  Sun Feb 27 15:26:57 2005
From: pink at odahoda.de (Pink)
Date: Sun, 27 Feb 2005 21:26:57 +0100
Subject: Need help running external program
References: <c2nUd.3268977$B07.514197@news.easynews.com>
	<cvsvbb$nne$01$1@news.t-online.com>
	<vMnUd.3552914$f47.637318@news.easynews.com>
	<38ejcfF5lu11pU1@individual.net>
	<hJpUd.3282122$B07.516470@news.easynews.com>
Message-ID: <cvtaeh$ukb$02$1@news.t-online.com>

Rigga wrote:
>> No, the r was the point - it's there to tell Python not to do any
>> escaping on the string. Try it again with the r and see what happens.
>> 
> Brilliant!!!  that works a treat thankyou!!, where on earth did you find
> out
> about the 'r'  any pointers to documentation appreciated.
This is a pretty common problem when working with regular expression (which
usually contain many backslashes) - that's where I saw this syntax for the
first time (e.g. http://docs.python.org/lib/match-objects.html).
The official reference for string literals is here:
http://docs.python.org/ref/strings.html

c ya



From cjbottaro at alumni.cs.utexas.edu  Wed Feb 16 16:20:20 2005
From: cjbottaro at alumni.cs.utexas.edu (Christopher J. Bottaro)
Date: Wed, 16 Feb 2005 15:20:20 -0600
Subject: super not working in __del__  ?
References: <cuu0pu$t44$1@sea.gmane.org> <cuuqrr$f1o$1@sea.gmane.org>
	<mailman.2697.1108571847.22381.python-list@python.org>
	<11171oljbbb5cd3@corp.supernews.com>
Message-ID: <cv0d9q$gcp$1@sea.gmane.org>

Jeff Shannon wrote:

> Christopher J. Bottaro wrote:
> 
>> 2 Questions...
>> 1)  Why does this never happen in C++?  Or does it, its just never
>> happened to me?
>> 2)  I can understand random destruction of instantiated objects, but I
>> find it weird that class definitions (sorry, bad terminology) are
>> destroyed at
>> the same time.  So __del__ can't safely instantiate any classes if its
>> being called as a result of interpreter shutdown?  Boo...
> 
> Keep in mind that in Python, everything is a (dynamically created)
> object, including class objects.  My recall of C/C++ memory
> organization is pretty weak, but IIRC it gives completely different
> behavior to code, stack objects, and heap objects.  Code never needs
> to be cleaned up.  In Python, everything (including functions and
> classes) is effectively a heap object, and thus functions and classes
> can (and indeed must) be cleaned up.  Refcounting means that they
> won't ever (normally) be cleaned up while they're still in use, but
> during program shutdown refcounting necessarily ceases to apply.
> 
> The closest that would happen in C++, I believe, would manifest itself
> as memory leaks and/or access of already-freed memory.

So encapsulating your script in a main function fixes the problem:

def main():
  blah blah

if __name__ == "__main__":
  main()

because all the objects instantiated in main() will be deleted when main
ends, but before the interpreter shuts down, thus the objects will have
access to all the symbols in module's __dict__ (or however that works).

Why can't Python kind of do this step for us?  I'm just curious, this stuff
is interesting to me.  Is it because it wouldn't know what parts of the
module should be automatically put in the main function and what parts
shouldn't?

class blah:
  pass

class blah1:
  pass

# following goes in automatically generated main function
obj = blah()
obj2 = blah2()
obj.doStuff()
# main ends
# interpreter shutdown

I guess it wouldn't know to leave the class objects outside of the
automatically generated main function.

Just tell if my ramblings are idiotic and I'll shutup.

Thanks,
-- C



From duncan.booth at invalid.invalid  Tue Feb 22 09:29:37 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 22 Feb 2005 14:29:37 GMT
Subject: UTF-8 / German,
	Scandinavian letters - is it really this difficult?? Linux &
	Windows XP
References: <cve1vh$c37$1@phys-news1.kolumbus.fi>
	<1109078512.094288.316030@z14g2000cwz.googlegroups.com>
	<421b385e$0$230$edfadb0f@dread12.news.tele.dk>
Message-ID: <Xns9605931E65A23duncanrcpcouk@127.0.0.1>

Max M wrote:

> And this string will automatically be utf-8 encoded:
> 
> st = '???'
> 
> So you should be able to convert it to unicode without giving an
> encoding: 
> 
> ust = unicode(st)
> 
No.

Strings have no knowledge of their encoding. As you describe the string 
will be utf-8 encoded, but you still have to tell it that when you decode 
it.


From nvhengr at gmail.com  Thu Feb 10 15:45:12 2005
From: nvhengr at gmail.com (Chris)
Date: 10 Feb 2005 12:45:12 -0800
Subject: Python COM Makepy Excel 9.0 error
In-Reply-To: <MsPOd.31826$C24.2998@attbi_s52>
References: <1108062567.928124.219200@g14g2000cwa.googlegroups.com>
	<MsPOd.31826$C24.2998@attbi_s52>
Message-ID: <1108068312.687439.296020@c13g2000cwb.googlegroups.com>

Thank you!  That did the trick.



From kent37 at tds.net  Wed Feb 23 18:49:54 2005
From: kent37 at tds.net (Kent Johnson)
Date: Wed, 23 Feb 2005 18:49:54 -0500
Subject: Communication between JAVA and python
In-Reply-To: <421ce234$0$12950$626a14ce@news.free.fr>
References: <421ce234$0$12950$626a14ce@news.free.fr>
Message-ID: <421d137e$1_1@newspeer2.tds.net>

Jacques Daussy wrote:
> Hello
> How can I transfert information between a JAVA application and a python 
> script application. I can't use jython because, I must use python 
> interpreter.I think to socket or semaphore, but can I use it on Windows 
> plateform ?

Jython has an interpreter and Windows has sockets.

Kent


From jkjone2002 at att.net  Wed Feb 16 11:26:50 2005
From: jkjone2002 at att.net (john san)
Date: Wed, 16 Feb 2005 11:26:50 -0500
Subject: [newbie]How to install python under DOS and is there any
	Wxpython can be installed under dos?
References: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
	<mailman.2685.1108553200.22381.python-list@python.org>
Message-ID: <b9-dnTUOwoYK647fRVn-2Q@rogers.com>

pure DOS, old pc, used for teaching . want show some "windows" under DOS
(under Python).



"Daniel Bowett" <daniel at bowettsolutions.com> ????
news:mailman.2685.1108553200.22381.python-list at python.org...
> john san wrote:
> > How to install python under DOS and is there any Wxpython-like can be
> > installed under dos?
> >
> > Thanks.
> >
> >
>
> Are you actually still running a pure DOS machine? Or are you running
> the dos prompt through Windows?
>




From newsgroups at jhrothjr.com  Tue Feb  1 17:27:48 2005
From: newsgroups at jhrothjr.com (John Roth)
Date: Tue, 1 Feb 2005 16:27:48 -0600
Subject: Next step after pychecker
References: <41ff0308$0$6503$636a15ce@news.free.fr>
	<pan.2005.02.01.10.21.23.762637@nospam.logilab.fr>
Message-ID: <11000kcim8pvh6c@news.supernews.com>


"Sylvain Thenault" <sylvain.thenault at nospam.logilab.fr> wrote in message 
news:pan.2005.02.01.10.21.23.762637 at nospam.logilab.fr...
> On Tue, 01 Feb 2005 05:18:12 +0100, Philippe Fremy wrote:
>
> Did you take a look at the starkiller [1] and pypy projects [2] ?

Has anything happened to Starkiller since PyCon 2004? The
latest mention I can find on Google is a blog entry (by Ted
Leung) on Aug 30 saying he wished someone would give the
author some money to finish it and publish it.

John Roth



From deetsNOSPAM at web.de  Mon Feb  7 11:25:50 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 07 Feb 2005 17:25:50 +0100
Subject: Making dynamic data available via ODBC with Python
References: <877jlke5fp.fsf@andreasen.org>
Message-ID: <36pitsF53pt5oU1@individual.net>

> 
> Is there some better way of doing this -- some way to provide tabular
> data remotely to Windows machines, usable in Office programs, which
> happens to already have some Python code written for it? Looking
> around, there is at least one XML-to-ODBC bridge but encoding the
> entire data file as XML is likely to have prohibitive overhead.

I still think that this is the most viable solution - if performance is bad,
you could still explore other possibilities.

 If it actually is performing bad - either literally or due to a badly
design - I'd go for creating a odbc2your-server driver. That would allow
you to cope with a pretty well defined standard (odbc) and doing the
network stuff totally on your own behalf instead of trying to make some
self-written protocol stack like postgres so compatible that a postgres
odbc driver doesn't know the difference.

-- 
Regards,

Diez B. Roggisch


From steven.bethard at gmail.com  Sun Feb 13 12:27:20 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 13 Feb 2005 10:27:20 -0700
Subject: help please
In-Reply-To: <1108260752.791847.180060@l41g2000cwc.googlegroups.com>
References: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
	<TPKdnU2eEu9xPJPfRVn-vg@comcast.com>
	<1108260752.791847.180060@l41g2000cwc.googlegroups.com>
Message-ID: <Z4ydnbKMDLVvEJLfRVn-hA@comcast.com>

gargonx wrote:
> This works much better, aside from the fact that it does'nt work for
> the std dictionary. the letters used from here stay the same. that
> dictionary looks like this:
> 
> std = {
>     "A":"Z",
>     "Z":"A",
>     "B":"Y",
>     "Y":"B",
>     "C":"X",
>     "X":"C",
>     "E":"V",
>     "V":"E",
>     "H":"S",
>     "S":"H",
>     "M":"N",
>     "N":"M"
>     }
> 
> what could be causing this?
> 
> i did figure out that if you reverse the k,v you are able to get it but
> that doesn't turn up the results i need
> 
> def proc(text):
>      result = []
>      for word in text:
>          for k, v in replacements:
>              word = word.replace(v,k) #here i reversed them
>          result.append(word)
>      return ''.join(result)
> 


The problem is that if you run all the replacements in std, you first 
translate As to Zs and then Zs to As.  If you want to do each character 
only once, you should probably write this as:

py> std = {
...     "A":"Z",
...     "Z":"A",
...     "B":"Y",
...     "Y":"B",
...     "C":"X",
...     "X":"C",
...     "E":"V",
...     "V":"E",
...     "H":"S",
...     "S":"H",
...     "M":"N",
...     "N":"M"}
py> ext = {"aa":"i"}
py> punc = {",":"!"}
py> replacements = {}
py> replacements.update(punc)
py> replacements.update(ext)
py> replacements.update(std)
py> def proc(text):
...     result = []
...     for char in text:
...         result.append(replacements.get(char, char))
...     return ''.join(result)
...
py> proc('ABCDEFG')
'ZYXDVFG'

Or alternatively:

py> def proc(text):
...     return ''.join([replacements.get(c, c) for c in text])
...
py> proc('ABCDEFG')
'ZYXDVFG'

Note however, that this won't work for multi-character strings like you 
had in 'ext' in your original example:

py> proc('ABCaaEFG')
'ZYXaaVFG'

But neither would your original code.  Are the items in std always a 
single character?  Does ext always translate two characters to one? 
Could you give us some more info on the task here?

Steve


From steven.bethard at gmail.com  Fri Feb  4 13:08:28 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 04 Feb 2005 11:08:28 -0700
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <dvOMd.33656$EG1.19314@lakeread04>
References: <dvOMd.33656$EG1.19314@lakeread04>
Message-ID: <xqCdnQlfh-iEJ57fRVn-sw@comcast.com>

Alan McIntyre wrote:
> Hi all,
> 
> I have a list of items that has contiguous repetitions of values, but 
> the number and location of the repetitions is not important, so I just 
> need to strip them out.  For example, if my original list is 
> [0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5], I want to end up with [0,1,2,3,2,4,5].
> 
> Here is the way I'm doing this now:
> 
> def straightforward_collapse(myList):
>     collapsed = [myList[0]]
>     for n in myList[1:]:
>         if n != collapsed[-1]:
>             collapsed.append(n)
> 
>     return collapsed
> 
> Is there an elegant way to do this, or should I just stick with the code 
> above?

Here's a solution that works for iterables other than lists:

py> def collapse(iterable):
...     enumeration = enumerate(iterable)
...     _, lastitem = enumeration.next()
...     yield lastitem
...     for i, item in enumeration:
...         if item != lastitem:
...             yield item
...             lastitem = item
...
py> lst = [0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5]
py> list(collapse(lst))
[0, 1, 2, 3, 2, 4, 5]

Again, I'm still not sure I'd call this more elegant...

STeVe


From ods at strana.ru  Fri Feb 11 04:43:08 2005
From: ods at strana.ru (Denis S. Otkidach)
Date: Fri, 11 Feb 2005 12:43:08 +0300
Subject: sre is broken in SuSE 9.2
In-Reply-To: <1108064973.719544.228970@z14g2000cwz.googlegroups.com>
References: <mailman.2299.1108029731.22381.python-list@python.org>
	<1108060527.378911.146240@o13g2000cwo.googlegroups.com>
	<cugc2v$i8u$1@swifty.westend.com>
	<1108064973.719544.228970@z14g2000cwz.googlegroups.com>
Message-ID: <20050211124308.2fa01738.ods@strana.ru>

On 10 Feb 2005 11:49:33 -0800
"Serge Orlov" <Serge.Orlov at gmail.com> wrote:

> This thread is about problems only with LANG=C or LANG=POSIX, it's not
> about other locales. Other locales are working as expected.

You are not right.  I have LANG=de_DE.UTF-8, and the Python test_re.py
doesn't pass.  $LANG doesn't matter if I don't call setlocale. 
Fortunately setting any non-C locale solves the problem for all (I
believe) unicode character:

>>> re.compile(ur'\w+', re.U).findall(u'\xb5\xba\xe4\u0430')
[u'\xb5\xba\xe4\u0430']

-- 
Denis S. Otkidach
http://www.python.ru/      [ru]


From fbasegmezatbcdidotcom  Fri Feb  4 23:14:02 2005
From: fbasegmezatbcdidotcom (Fahri Basegmez)
Date: Fri, 4 Feb 2005 23:14:02 -0500
Subject: returning True, False or None
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
	<6Z6dnVfTmdUDopnfRVn-1A@rcn.net> <36iv03F4urakqU1@individual.net>
Message-ID: <s-qdnUN84dx82pnfRVn-hQ@rcn.net>


"Mick Krippendorf" <mad.mick at gmx.de> wrote in message 
news:36iv03F4urakqU1 at individual.net...
> Fahri Basegmez wrote:
>> reduce(lambda x, y: x or y, lst)
>
> This doesn't solve the OPs problem since
>
> >>> reduce(lambda x, y: x or y, [False, None])
>
> returns None instead of False.
>
> Mick.
>

You are right.
I tested None or False and it worked. I assumed order did not matter for or 
operator.

None or False returns False
False or None returns None

You know what they say about assumptions. Live and learn.

Fahri




From dummyboy at hongkong-hosting-service.com  Sat Feb 19 05:27:15 2005
From: dummyboy at hongkong-hosting-service.com (dummyboy at hongkong-hosting-service.com)
Date: Sat, 19 Feb 2005 10:27:15 +0000 (UTC)
Subject: =?iso-8859-1?q?=B1M=B7=7E=BA=F4=AD=B6=B1H=A6s=AAA=B0=C8_=A6P=A8B?=
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	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
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	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
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	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
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	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
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	=?iso-8859-1?q?=2E=2E=2E=2E=2E=2E=2E=2E=2E?=
Message-ID: <cv74a3$peo$282@news.hgc.com.hk>

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From francis.girard at free.fr  Sun Feb 13 12:57:27 2005
From: francis.girard at free.fr (Francis Girard)
Date: Sun, 13 Feb 2005 18:57:27 +0100
Subject: check if object is number
In-Reply-To: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
Message-ID: <200502131857.27541.francis.girard@free.fr>

Le vendredi 11 F?vrier 2005 20:11, Steven Bethard a ?crit?:
> Is there a good way to determine if an object is a numeric type?
> Generally, I avoid type-checks in favor of try/except blocks, but I'm
> not sure what to do in this case:
>
>      def f(i):
>          ...
>          if x < i:
>              ...
>
> The problem is, no error will be thrown if 'i' is, say, a string:
>
> py> 1 < 'a'
> True
> py> 10000000000 < 'a'
> True
>
> But for my code, passing a string is bad, so I'd like to provide an
> appropriate error.
>


This is a very bad Python feature that might very well be fixed in version 3.0 
according to your own reply to a previous thread. This problem clearly shows 
that this Python feature does hurt.

Here's a transcript of the answer :

> Yes, that rule being to compare objects of different types by their type
> names (falling back to the address of the type object if the type names
> are the same, I believe). ?Of course, this is arbitrary, and Python does
> not guarantee you this ordering -- it would not raise backwards
> compatibility concerns to, say, change the ordering in Python 2.5.
>
> > What was the goal behind this rule ?
>
> I believe at the time, people thought that comparison should be defined
> for all Python objects. ?Guido has since said that he wishes the
> decision hadn't been made this way, and has suggested that in Python
> 3.0, objects of unequal types will not have a default comparison.
>
> Probably this means ripping the end off of default_3way_compare and
> raising an exception. ?As Fredrik Lundh pointed out, they could, if they
> wanted to, also rip out the code that special-cases None too.
>
> Steve 



Regards

Francis Girard




From percivall at gmail.com  Fri Feb 25 13:42:06 2005
From: percivall at gmail.com (percivall at gmail.com)
Date: 25 Feb 2005 10:42:06 -0800
Subject: Is there way to determine which class a method is bound to?
In-Reply-To: <cvnidj$4si$1@panix2.panix.com>
References: <mailman.3053.1109342775.22381.python-list@python.org>
	<cvnidj$4si$1@panix2.panix.com>
Message-ID: <1109356926.896648.165360@g14g2000cwa.googlegroups.com>

Another way is to make a simple metaclass, setting an attribute (like
defining_class, or something) on each function object in the class
dictionary.



From lkirsh at cs.ubc.ca  Wed Feb 23 04:56:02 2005
From: lkirsh at cs.ubc.ca (Lowell Kirsh)
Date: Wed, 23 Feb 2005 01:56:02 -0800
Subject: how can I make this script shorter?
In-Reply-To: <nftl11tfimccjktktnj7oohbcvkfcjpe7f@4ax.com>
References: <cveqr1$a47$1@mughi.cs.ubc.ca>
	<nftl11tfimccjktktnj7oohbcvkfcjpe7f@4ax.com>
Message-ID: <cvhjvj$142$1@mughi.cs.ubc.ca>

Good idea about hashing part of the file before comparing entire files. 
It will make the script longer but the speed increase will most likely 
make it worth it.

Lowell

Christos TZOTZIOY Georgiou wrote:
> On Tue, 22 Feb 2005 00:34:39 -0800, rumours say that Lowell Kirsh
> <lkirsh at cs.ubc.ca> might have written:
> 
> 
>>I have a script which I use to find all duplicates of files within a 
>>given directory and all its subdirectories. It seems like it's longer 
>>than it needs to be but I can't figure out how to shorten it. Perhaps 
>>there are some python features or libraries I'm not taking advantage of.
>>
>>The way it works is that it puts references to all the files in a 
>>dictionary with file size being the key. The dictionary can hold 
>>multiple values per key. Then it looks at each key and all the 
>>associated files (which are the same size). Then it uses filecmp to see 
>>if they are actually byte-for-byte copies.
>>
>>It's not 100% complete but it's pretty close.
> 
> 
> I can't advise on code length; my dupefind.py script is 361 lines, but the
> algorithm is slightly more complex to speed things up (and it also optionally
> hardlinks identical files on POSIX and NTFS filesystems).  If in your case there
> are lots of files of several MiB each, that often match on size, you could avoid
> lots of comparisons if you did match based on some hash (md5 or sha).
> 
> You could also compare first on the hash of the first few kiB (I check 8 kiB) to
> see if you need to read the whole file or not.
> 
> So:
> 
> for every file:
>   if other files exist with the same size:
>     calculate hash for first few kiB
>     if file has same "initial" hash with other files:
>       calculate full hash
>       return all files with same full hash
> 
> Something like that.


From ncoghlan at iinet.net.au  Fri Feb  4 22:59:54 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 05 Feb 2005 13:59:54 +1000
Subject: string issue
In-Reply-To: <cu0jul$lm5$1@solaris.cc.vt.edu>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu> <R4QMd.33663$EG1.10366@lakeread04>
	<cu0jul$lm5$1@solaris.cc.vt.edu>
Message-ID: <420444BA.9050106@iinet.net.au>

rbt wrote:
> Alan McIntyre wrote:
> 
>> I think it's because you're modifying the list as you're iterating 
>> over it.  
> 
> 
> One last clarification on this. It's OK to modify the elements of a 
> list, but not the list itself while iterating over it... is that the 
> correct way to think about this?

Correct - the iteration code bases the iteration on the *old* list structure, so 
you can end up with odd behaviour.

Py> l = range(10)
Py> for i in l: del l[i]
...
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
IndexError: list assignment index out of range
Py> l
[1, 2, 4, 5, 7, 9]

Dictionaries have the same problem, but they include some guards that try to 
detect it:

Py> d = dict.fromkeys(range(10))
Py> for i in d: del d[i]
...
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
RuntimeError: dictionary changed size during iteration

This feature can't be added to lists because it is possible to iterate sensibly 
over a mutating list:

Py> l = range(10)
Py> for i in reversed(l): del l[i]
...
Py> l
[]

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From rkern at ucsd.edu  Sun Feb 20 07:34:33 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sun, 20 Feb 2005 04:34:33 -0800
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2858.1108901620.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr><42172136$0$27576$9b622d9e@news.freenet.de><cv7i57$d0v$1@usenet.otenet.gr>	<cv7k8e$4pa$03$1@news.t-online.com><cv7m2m$gp$1@usenet.otenet.gr><mailman.2837.1108832106.22381.python-list@python.org>	<cv9sd9$69n$2@usenet.otenet.gr>
	<mailman.2858.1108901620.22381.python-list@python.org>
Message-ID: <cva04m$h3o$1@news1.ucsd.edu>

Fredrik Lundh wrote:
> Ilias Lazaridis wrote:
> 
> 
>>>>Should a professional developer take python serious?
>>>
>>>yes.
>>
>>Should I take answers serious?
> 
> 
> yes.
> 
> 
>>Answer from people which do not respect coherence of writings?
> 
> 
> coherence of writings?

Ironic, is it not?

I think he's referring to the fact that you snipped some of the email 
you were replying to.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From steven.bethard at gmail.com  Tue Feb  8 02:04:50 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 08 Feb 2005 00:04:50 -0700
Subject: empty classes as c structs?
In-Reply-To: <mailman.2133.1107826249.22381.python-list@python.org>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<7rSdne7BcbDeV57fRVn-jg@comcast.com>	<mailman.1963.1107594941.22381.python-list@python.org>	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>	<mailman.1973.1107618702.22381.python-list@python.org>	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>	<mailman.2006.1107658273.22381.python-list@python.org>	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>	<mailman.2049.1107750700.22381.python-list@python.org>	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com>	<4207606E.4040806@iinet.net.au>	<mailman.2094.1107800398.22381.python-list@python.org>	<XYqdnb9bj4sVJZrfRVn-vw@comcast.com>
	<mailman.2133.1107826249.22381.python-list@python.org>
Message-ID: <P8mdnSM2vpsO-ZXfRVn-hA@comcast.com>

Michael Spencer wrote:
> I see no problem in repeating the methods, or inheriting the 
> implementation. However, if namespace and bunch are actually different 
> concepts (one with reference semantics, the other with copy), then 
> __repr__ at least would need to be specialized, to highlight the 
> difference.

Yeah, I could certainly see them being separate...  Of course, someone 
else will have to write the PEP for Namespace then.  ;)

> def __ge__(self, other):
>     for attrname in other.__dict__.keys():
>         if not attrname in self.__dict__:
>             return False
>     return True
> 
> I realize that interfaces may be addressed formally by a current PEP, 
> but, even if they are, this "cheap and cheerful" approach appeals to me 
> for duck-typing.
> 
> However, as I think more about this, I realize that I am stretching your 
> concept past its breaking point, and that whatever the merits of this 
> approach, it's not helping you with bunch.  Thanks for knocking the 
> ideas around with me.

My pleasure.  It's good to talk some use-cases, and make sure I cover as 
much as is feasible in the PEP.  I think __ge__ is probably too far out 
from the original intentions, but I'll make sure to write 
Bunch/Namespace to be as inheritance-friendly as possible so that adding 
such behavior by inheriting from Bunch/Namespace should be simple.

Thanks for all your comments!

Steve


From petite.abeille at gmail.com  Mon Feb 28 07:20:35 2005
From: petite.abeille at gmail.com (PA)
Date: Mon, 28 Feb 2005 13:20:35 +0100
Subject: Python - what is the fastest database ?
In-Reply-To: <1109592623.116661.101880@g14g2000cwa.googlegroups.com>
References: <1109592623.116661.101880@g14g2000cwa.googlegroups.com>
Message-ID: <8e7e90420531b2b307507f8e43eb6401@gmail.com>


On Feb 28, 2005, at 13:10, martijn at gamecreators.nl wrote:

> What type database do they use / software ?

Hmmm... they don't use a "database" in the traditional sense of the 
term.

http://www-db.stanford.edu/~backrub/google.html

Cheers

--
PA, Onnay Equitursay
http://alt.textdrive.com/



From grahamd at dscpl.com.au  Mon Feb 21 05:46:43 2005
From: grahamd at dscpl.com.au (grahamd at dscpl.com.au)
Date: 21 Feb 2005 02:46:43 -0800
Subject: Moving to Python from PHP - 3 questions
References: <mailman.2873.1108931203.22381.python-list@python.org>
	<cvat62$9h0$05$1@news.t-online.com>
	<mailman.2875.1108933444.22381.python-list@python.org>
	<cvb26i$bph$1@eeyore.INS.cwru.edu>
Message-ID: <1108982803.898640.269150@l41g2000cwc.googlegroups.com>

> If you do manage to get mod_python working, I suggest taking a look
at
> Vampire as well: http://www.dscpl.com.au/projects/vampire/
> I have had good experience with it. Once you start using mod_python
> you'll realize you can really go anywhere you want; and that's not
> necessarily a good thing. Vampire points you in a nice direction (I
> don't want to say 'the right' direction).

Vampire is still in a growing phase, so would be interested to hear any
comments you may have about how it can be improved. Up until now
I have mainly been focusing on making the basic features of mod_python
just that bit easier to use.

And yes I know that a lot more documentation would be a good start.
I am so snowed under with work in my real job at the moment that
progress is slow in that respect. :-(



From mahs at telcopartners.com  Fri Feb  4 20:58:30 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 04 Feb 2005 17:58:30 -0800
Subject: changing local namespace of a function
In-Reply-To: <cu1518$ld6$1@joe.rice.edu>
References: <cu0lru$8ik$1@joe.rice.edu>	<mailman.1926.1107555819.22381.python-list@python.org>
	<cu1518$ld6$1@joe.rice.edu>
Message-ID: <cu1926$181$1@sea.gmane.org>

Bo Peng wrote:
> Michael Spencer wrote:
> 
  >
> There are hundreds of items in the dictionary (that will be needed in 
> the calculation) so passing the whole dictionary is a lot better than 
> passing individual items.
...
> 
> def fun(d):
>   exec 'z = x + y' in globals(), d
> 
> seems to be more readable than
> 
> def fun(d):
>   d['z'] = d['x'] + d['y']
> 
> But how severe will the performance penalty be?

Try it and see.
> 
> Bo

Compare it with Jeff Shannon's suggestion, and with a lazy dict-wrapper like this:

  >>> class wrapbigdict(object):
  ...     """Lazy attribute access to dictionary keys.  Will not access
  ...         keys that are not valid attribute names!"""
  ...     def __init__(self, mydict):
  ...         object.__setattr__(self, "mydict",mydict)
  ...     def __getattr__(self, attrname):
  ...         return self.mydict[attrname]
  ...     def __setattr__(self, attrname, value):
  ...         self.mydict[attrname] = value
  ...
  ...
  >>> a = {'x':1, 'y':2}
  >>> b = {'x':3, 'y':3}
  ...
  >>> w_a = wrapbigdict(a)
  >>> w_b = wrapbigdict(b)
  ...
  >>> def fun(d):
  ...     d.z = d.x + d.y
  ...
  >>> fun(w_a)
  >>> fun(w_b)
  ...
  >>> w_a.mydict
{'y': 2, 'x': 1, 'z': 3}
  >>> w_b.mydict
{'y': 3, 'x': 3, 'z': 6}
  >>>




From jaydonnell at gmail.com  Tue Feb  8 16:44:48 2005
From: jaydonnell at gmail.com (jdonnell)
Date: 8 Feb 2005 13:44:48 -0800
Subject: PHP Embedded In Python
In-Reply-To: <1107872763.019447.281670@c13g2000cwb.googlegroups.com>
References: <1107814685.908990.58410@z14g2000cwz.googlegroups.com>
	<1107818262.741563.266050@c13g2000cwb.googlegroups.com>
	<1107872763.019447.281670@c13g2000cwb.googlegroups.com>
Message-ID: <1107899088.967746.48530@g14g2000cwa.googlegroups.com>

Well it depends on how php is installed. Is it a linux system? Do you
know how to run a php script from the command line?

Once you have the php script running from the command line then you
need to use the os module in python. There are a couple different ways
to do it. Read the following for more info.
http://docs.python.org/lib/os-process.html
http://docs.python.org/lib/os-newstreams.html#os-newstreams

simple example:

import os
handle = os.popen('path/to/yourScript.php', 'r')
print handle.read()



From jjl at pobox.com  Sun Feb  6 15:10:58 2005
From: jjl at pobox.com (John J. Lee)
Date: 06 Feb 2005 20:10:58 +0000
Subject: Insane import behaviour and regrtest.py: heeelp
References: <87sm4aws3v.fsf@pobox.com>
	<mailman.2007.1107659039.22381.python-list@python.org>
	<876515ixj0.fsf@pobox.com>
	<mailman.2026.1107710574.22381.python-list@python.org>
Message-ID: <87wttlh2jx.fsf@pobox.com>

Tim Peters <tim.peters at gmail.com> writes:

> [John J. Lee]
> > ...
> > I tried it, and I get the same results as before (the test modules from my
> > installed copy of Python are picked up instead of the local copies in
> > my CVS checkout's Lib/test, apparently entirely contrary to sys.path).
> 
> Try running Python with -vv (that's two letter "v", not one letter
> "w").  That will display a long-winded account of everything Python
> tries in order to satisfy an import.

Thanks.

I'm still puzzled, though.  Reading the -vv output, I see that when
importing test_cookielib (which is currently the only line in my
regrtest.py -f file), Python doesn't appear to look in Lib/test to
find module "test.test_cookielib" (the actual string passed by
regrtest.py to __import__): see the output below.

Why does Python not look in

/usr/local/src/python/python/dist/src/Lib/test

for test_cookielib.py{,c,o}??


Snippet to show print statements I added to my regrtest.py :

.     try:
.         save_stdout = sys.stdout
.         try:
.             if cfp:
.                 sys.stdout = cfp
.                 print test              # Output file starts with test name
.             if test.startswith('test.'):
.                 abstest = test
.             else:
.                 # Always import it from the test package
.                 abstest = 'test.' + test
.+            print >> sys.stderr, ">>>>>>>sys.path", sys.path
.             the_package = __import__(abstest, globals(), locals(), [])
.+            print >> sys.stderr, ">>>>>>>the_package.__path__", the_package.__path__
.             the_module = getattr(the_package, test)
.             # Most tests run to completion simply as a side-effect of

Only other change to regrtest.py:

. if __name__ == '__main__':
.     # Remove regrtest.py's own directory from the module search path.  This
.     # prevents relative imports from working, and relative imports will screw
.     # up the testing framework.  E.g. if both test.test_support and
.     # test_support are imported, they will not contain the same globals, and
.     # much of the testing framework relies on the globals in the
.     # test.test_support module.
.     mydir = os.path.abspath(os.path.normpath(os.path.dirname(sys.argv[0])))
.     i = pathlen = len(sys.path)
.     while i >= 0:
.         i -= 1
.         if os.path.abspath(os.path.normpath(sys.path[i])) == mydir:
.             del sys.path[i]
.     if len(sys.path) == pathlen:
.         print 'Could not find %r in sys.path to remove it' % mydir
.+    lib = "/usr/local/src/python/python/dist/src/Lib"
.+    sys.path.insert(0, lib)
.-    main()
.+    main(testdir=lib)


Here's what I've got in my CVS checkout:

Lib[0]$ pwd
/hda/usr/local/buf/python/python/dist/src/Lib
Lib[0]$ ls test/test_cookielib* | grep -v 'patch\|latest\|~'
test/test_cookielib.py
test/test_cookielib.pyc


And the output:

Lib[0]$ python2.4 -u -vv test/regrtest.py -f test/torun -v 2>&1 | less
[...long snip...]
# trying /usr/local/lib/python2.4/lib-tk/time.py
# trying /usr/local/lib/python2.4/lib-tk/time.pyc
# trying /usr/local/lib/python2.4/lib-dynload/time.so
dlopen("/usr/local/lib/python2.4/lib-dynload/time.so", 2);
import time # dynamically loaded from /usr/local/lib/python2.4/lib-dynload/time.so
test_cookielib
>>>>>>>sys.path ['/usr/local/src/python/python/dist/src/Lib', '/home/john/lib/python', '/usr/local/lib/python24.zip', '/usr/local/lib/python2.4', '/usr/local/lib/python2.4/plat-linux2', '/usr/local/lib/python2.4/lib-tk', '/usr/local/lib/python2.4/lib-dynload', '/usr/local/lib/python2.4/site-packages']
# trying /usr/local/lib/python2.4/test/test_cookielib.so
# trying /usr/local/lib/python2.4/test/test_cookielibmodule.so
# trying /usr/local/lib/python2.4/test/test_cookielib.py
import test.test_cookielib # from /usr/local/lib/python2.4/test/test_cookielib.py
# can't create /usr/local/lib/python2.4/test/test_cookielib.pyc
# trying /usr/local/lib/python2.4/test/re.so
# trying /usr/local/lib/python2.4/test/remodule.so
# trying /usr/local/lib/python2.4/test/re.py
# trying /usr/local/lib/python2.4/test/re.pyc
# trying /usr/local/lib/python2.4/test/time.so
# trying /usr/local/lib/python2.4/test/timemodule.so
# trying /usr/local/lib/python2.4/test/time.py
# trying /usr/local/lib/python2.4/test/time.pyc
# trying /usr/local/lib/python2.4/test/test.so
# trying /usr/local/lib/python2.4/test/testmodule.so
# trying /usr/local/lib/python2.4/test/test.py
# trying /usr/local/lib/python2.4/test/test.pyc
>>>>>>>the_package.__path__ ['/usr/local/lib/python2.4/test']
# trying /usr/local/lib/python2.4/test/test_sets.so
# trying /usr/local/lib/python2.4/test/test_setsmodule.so
# trying /usr/local/lib/python2.4/test/test_sets.py
# /usr/local/lib/python2.4/test/test_sets.pyc matches /usr/local/lib/python2.4/test/test_sets.py
import test.test_sets # precompiled from /usr/local/lib/python2.4/test/test_sets.pyc
# trying /usr/local/lib/python2.4/test/operator.so
# trying /usr/local/lib/python2.4/test/operatormodule.so
# trying /usr/local/lib/python2.4/test/operator.py
# trying /usr/local/lib/python2.4/test/operator.pyc
# trying /usr/local/src/python/python/dist/src/Lib/operator.so
[...long snip...]


John


From snail at objmedia.demon.co.uk  Mon Feb 14 14:18:27 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Mon, 14 Feb 2005 19:18:27 +0000
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupupa$kfs$2@usenet.otenet.gr>
	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>
	<cuqqqi$ep1$1@ctb-nnrp2.saix.net>
	<1108407625.250592.104280@c13g2000cwb.googlegroups.com>
Message-ID: <jN0XedqDmPECFwnz@objmedia.demon.co.uk>

In message <1108407625.250592.104280 at c13g2000cwb.googlegroups.com>, Pat 
<pobrien at orbtech.com> writes
>Actually, no.  We ran into some issues with Python 2.4 that caused us
>to return to Python 2.3.5.  But I would really like to upgrade to
>Python 2.4.  So I started researching the subject before I did
>anything.

Pat, could you include some context in your replies? I have no idea if 
you are replying to my comments about Visual Studio Express or someone 
else? The only text I see in your replies is what you write, no text 
from the posting you are replying to. As it is I've ignored all your 
replies so far as I'm not sure I'm the person you are addressing (until 
I saw the above, now I'm confused).

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From devries at idolstarastronomer.com  Sun Feb 13 16:20:04 2005
From: devries at idolstarastronomer.com (Christopher De Vries)
Date: Sun, 13 Feb 2005 16:20:04 -0500
Subject: Q: Portable Way to Make Files Read Only
In-Reply-To: <X4SdnT6W257MBJLfRVn-2Q@adelphia.com>
References: <X4SdnT6W257MBJLfRVn-2Q@adelphia.com>
Message-ID: <20050213212004.GA24649@miyu.cjas.org>

On Sun, Feb 13, 2005 at 01:25:02PM -0600, Efrat Regev wrote:
>     I would like to recurse through a directory and make files (which match
> a specific criteria) read only. From searching the Internet, I found
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/303343
>     which shows how to change file attributes to read only using the
> win32api module. That's great, but I was hoping there's a more portable way
> to do so. Is there a more portable API call to make files read only?

assuming the variable "path" is set to a string indicating the file in
question, try the following:

import os
import stat

# get the current file mode
mode = os.stat(path)[stat.ST_MODE]

# set it so it is not user, group, or other writable
os.chmod(path, mode & ~stat.S_IWUSR & ~stat.S_IWGRP & ~stat.S_IWOTH)

#or

os.chmod(path,mode & ~0222)

Chris


From peter at engcorp.com  Mon Feb 28 17:15:58 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 28 Feb 2005 17:15:58 -0500
Subject: Calling external text-files (newb)
In-Reply-To: <mailman.3154.1109628053.22381.python-list@python.org>
References: <mailman.3154.1109628053.22381.python-list@python.org>
Message-ID: <1PKdnRHf74eABb7fRVn-ow@powergate.ca>

Andreas Winkler wrote:
> I tried to have python call an external 'Word'-file,
> and the read the whole text into a single string with
> the following code:
> [CODE]
> source = raw_input('file path')
> 
> File = open('source', 'r')
> S = input.read()
> 
> print S
> [/CODE]

Anything inside quotation marks is just a string of
characters, not a reference to a variable.  You are
asking it to open a file named "source", not to open
the file whose name is in the variable called source.

In addition, you are assigning the return value from
open() to a variable named "File", but then you are
not using that variable but are trying to read from
a non-existent object called "input" instead.  You'll
see an error for that if you fix only the first
problem and try rerunning the code, before you fix
the second (which you should do, to learn more).

Use this instead:

   f = open(source, 'r')
   s = f.read()
   print s

-Peter


From Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org  Wed Feb  9 17:55:55 2005
From: Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org (Alexander)
Date: Thu, 10 Feb 2005 01:55:55 +0300
Subject: variable declaration
References: <cuc4fh$25gg$1@bunyip2.cc.uq.edu.au>
Message-ID: <MSGID_2=3A5025=2F3.131_420abf45@fidonet.org>

Hi, Elspeth!

09 feb 2005 at 14:44, Elspeth Thorne wrote:
 >> You may say: give better names for your variables! Ha, I'am often
 >> don't understand that they mean! They are written for me by an
 >> engineer!
 ET> Hang on, though - if you don't understand what you are programming,
 ET> then how can you check if it's correct?
...skipped...
 ET> You'd hit the same issues (precisely the same issues) with any
 ET> language, if you flat-out do not know what you are doing - or trying
 ET> to do.

 ET> Admittedly, I have somewhat limited experience, so my word is not
 ET> gospel, or even necessarily well-informed.

I will inform you:) Let say you are working with the team of engineers. They
develop a project of new building, and they need some calculations of solidness
of metall constructions, specific for such kind of building. Such calculations
are rather complex, so they can't wrote program (or smth else) themselves. But
they can wrote and explain algorithm with calculations.
If you want understand their formulas, you must learn theoretical mechanicks,
resistance of materials, builder's standarts and rules (I'm not sure I
translate titles of the disciplines correctly). It will take a year, minimum.
But you have no such time - deadline is much closer:)

As for me, I _HATE_ such kind of job:) But sometimes it happens. And, after
some years, when you see the final result of such job, you fill some special
feelings. It differ from result of purely programmer's work. The result is big,
real, it may work for people during tens (or may be hundred) years.

Main problem in programming - programmer "look to the wrong place" or "overlook
coefficient", ... . Main weapon to fight with them - tests. We do it this way.
After engineer wrote an "algorithm", he take a calculator and began to work
according to it (it also help him to find "bugs"). Final result, and all
intermediate results are written. Every separate part of calculations (separate
function in program) tested separately and in whole.

But tests are not a silver bullet. static checking is also very usefull. What's
why I feel variable declaration (or explicit variable definition) may help.

Alexander, zatv at bk.ru


From simonroses at granisla.com  Thu Feb 10 10:08:10 2005
From: simonroses at granisla.com (Simon Roses Femerling)
Date: Thu, 10 Feb 2005 16:08:10 +0100
Subject: Two questions: python/Net(c#) and Win Raw sockets?
Message-ID: <01f501c50f82$55821240$4c0818ac@dis>

Hi all,

First Question: Anyone has experience with any of this Python/Net implementations:

- PythonNet
- IronPython
- Boo

Which is best for using in a c# app for embedding and extending ?

Second Question: I know that python 2.3 _socket.dll was not compile with raw socket support on windows. Anyone have a compile version or know
any solution for raw socket on windows for python 2.3 or 2.4 or I must compile my own version of _socket.dll ?

Thx

Sincerely,

SRF

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From steven.bethard at gmail.com  Wed Feb  2 14:26:46 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 02 Feb 2005 12:26:46 -0700
Subject: Hash of class from instance
In-Reply-To: <36cj80F4ue5biU1@individual.net>
References: <1107363342.531396.238350@g14g2000cwa.googlegroups.com>
	<Xns95F1AE4AFCC36duncanrcpcouk@127.0.0.1>
	<1107364617.371795.13740@l41g2000cwc.googlegroups.com>
	<36cj80F4ue5biU1@individual.net>
Message-ID: <UqidnSE1QIXrtJzfRVn-ug@comcast.com>

Mick Krippendorf wrote:
> In Python there seems to be no guarantee that different objects also
> have different hash values.

Well, it's true that you can override the __hash__ method to do whatever 
you want, but I believe the default for class __hash__ methods is to 
return the class id, which should be different for each class:

py> class C(object):
... 	pass
...
py> hash(C)
12699152
py> id(C)
12699152

Steve


From rkern at ucsd.edu  Thu Feb  3 02:52:35 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Wed, 02 Feb 2005 23:52:35 -0800
Subject: Reinstall python 2.3 on OSX 10.3.5?
In-Reply-To: <mailman.1792.1107403740.22381.python-list@python.org>
References: <mailman.1792.1107403740.22381.python-list@python.org>
Message-ID: <ctsl83$s1q$1@news1.ucsd.edu>

Christian Dieterich wrote:
> On D? C?adaoin, Feabh 2, 2005, at 17:48 America/Chicago, 
> moa at extrapolation.com wrote:
> 
>> Hi there
>>
>> I started a very long and roundabout process of attempting to install
>> python 2.3.4 along side my apple-installed 2.3 system. To make a long
>> story short, I have completely confabulated my environment ( i deleted
>> the 2.3 binaries and so forth from the system in an attempt to start
>> things fresh), and now I cannot figure out how to reinstall the base
>> 2.3 Apple python distribution.
>> Can somebody please point me in the right direction?
> 
> 
> You could use
> fink install python
> which makes you a Python installation under /sw.

But that doesn't solve his problem, which is to restore the 
Apple-supplied Python that he deleted.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From g.brandl-2005-01 at gmx.net  Sat Feb  5 08:36:30 2005
From: g.brandl-2005-01 at gmx.net (Georg Brandl)
Date: Sat, 05 Feb 2005 14:36:30 +0100
Subject: mounting a filesystem?
In-Reply-To: <pan.2005.02.03.02.15.29.529501@dcs.nac.uci.edu>
References: <pan.2005.02.03.02.15.29.529501@dcs.nac.uci.edu>
Message-ID: <36k0elF51attqU1@individual.net>

Dan Stromberg wrote:
> Is there a python module that can mount a filesystem?
> 
> More specifically, a loopback filesystem with a particular offset, under
> linux?

Why don't you just call the mount command via os.system, one of the
popen methods or one of the commands.* methods?

Georg


From janeaustine50 at hotmail.com  Wed Feb 23 08:01:46 2005
From: janeaustine50 at hotmail.com (janeaustine50 at hotmail.com)
Date: 23 Feb 2005 05:01:46 -0800
Subject: Style guide for subclassing built-in types?
In-Reply-To: <421c76cd$1_1@newspeer2.tds.net>
References: <ba1e306f.0502221846.70cb4d5c@posting.google.com>
	<1109127834.660822.247120@g14g2000cwa.googlegroups.com>
	<1109150091.356411.150460@l41g2000cwc.googlegroups.com>
	<1109151417.903188.73790@f14g2000cwb.googlegroups.com>
	<421c76cd$1_1@newspeer2.tds.net>
Message-ID: <1109163706.118457.53720@z14g2000cwz.googlegroups.com>


Kent Johnson wrote:
> janeaustine50 at hotmail.com wrote:
> > p.s. the reason I'm not sticking to reversed or even reverse :
suppose
> > the size of the list is huge.
>
> reversed() returns an iterator so list size shouldn't be an issue.
>
> What problem are you actually trying to solve?
>
> Kent
>

Oh, you are right.

Actually, it's more complicated than simple reversion. The list order
should be somewhat "twisted" and the list is big.

For example,

[1,2,3,4,5,6,7,8,9,10]

--> [10,9,8,7,6,1,2,3,4,5]

so __getitem__(self,i) => __getitem__(self,-i-1) if i<len(size)/2,
otherwise __getitem__(self,i-len(size)/2)

I'd like to have TwistedList class that takes in an original list and
pretends as if it is twisted actually. However, I have to have
duplicate codes here and there to make it act like a "list", say assert
twisted_list == [10,9,...] and for each in twisted_list and etc.



From vincent at visualtrans.de  Sat Feb 19 02:22:19 2005
From: vincent at visualtrans.de (Vincent Wehren)
Date: Sat, 19 Feb 2005 08:22:19 +0100
Subject: Chart Director?
In-Reply-To: <1108739705.870161.36050@z14g2000cwz.googlegroups.com>
References: <1108739705.870161.36050@z14g2000cwz.googlegroups.com>
Message-ID: <cv6pfa$1dc$1@news4.zwoll1.ov.home.nl>

kdahlhaus at yahoo.com wrote:
> Does anyone here have experience with Chart Director
> (http://www.advsofteng.com/index.html)?   I'm thinking about purchasing
> it and looking for any feedback from the Python community.  Thanks
> 

Since ChartDirector is not exactly open source nor found its origin in a 
Python setting, my uneducated guess is that it will mostly be companies 
that use ChartDirector.

However, from that vantage-point, ChartDirector is well-documented, has 
lots of examples, and is great value for the money; it's pretty straight 
forward, it covers all Python versions from 1.52 - 2.4, and the license 
generally encompasses all other language bindings, too (all being at 
version 4.0 except for the C++ version which is currently still at 3.04).

Still, you should just try it for what you are planning to use it /for/ 
and see if it meets /your/ specific needs.

--
Vincent Wehren







From fredrik at pythonware.com  Mon Feb 14 11:17:13 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 17:17:13 +0100
Subject: mxCGIPython binaries for Python 2.3.5
References: <20050211154457.GA23787@phd.pp.ru><20050211181320.GA23241@caltech.edu>
	<20050211183904.GA28714@phd.pp.ru>
	<20050214080603.1181621450.EP@zomething.com>
Message-ID: <cuqip9$q3f$1@sea.gmane.org>

"EP" <EP at zomething.com> wrote:

>    http://www.egenix.com/files/python/mxCGIPython.html

> I'm unschooled in non-Windows binaries.  Does this mean it may be possible
> to download this package onto a (for example) SunOS system, unpack and
> have Python up and running?

yes.

(that's the whole point, of course)

did you read the page he linked to?

    "... the interpreter together with the whole standard library and the builtin modules into
    one single file. All that remains is to FTP that binary to the ISP and off you go."

</F> 





From fredrik at pythonware.com  Mon Feb 14 16:29:47 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 22:29:47 +0100
Subject: - E02 - Support for MinGW Open Source Compiler
References: <ECBA357DDED63B4995F5C1F5CBE5B1E802107A93@its-xchg4.massey.ac.nz><mailman.2567.1108413263.22381.python-list@python.org>
	<ZCTpt0veGRECFwBP@objmedia.demon.co.uk>
Message-ID: <cur539$s3v$1@sea.gmane.org>

Stephen Kellett wrote:

> Lots of points from Tony stating a different point of view. I'll assume you are correct. However, 
> surely if you Python 2.4 installed they'll have this DLL anyway, so the point is moot, unless of 
> course, Python 2.4 is in breach as well.

the compilers used to build Python 2.4 were provided by Microsoft, free
of charge.  conspiracy theorists may see this as evidence of some evil plan,
of course, but I can assure you that when it comes to evilness, the PSU b 





From ashot at removemolsoftthis.com  Thu Feb  3 23:05:10 2005
From: ashot at removemolsoftthis.com (Ashot)
Date: Thu, 03 Feb 2005 22:05:10 -0600
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot>
	<1107487113.732375.110850@c13g2000cwb.googlegroups.com>
Message-ID: <opslnmywarej1m1c@ashot>

On 3 Feb 2005 19:18:33 -0800, James <fphsml at gmail.com> wrote:

>
> Ashot wrote:
>> I am using IPython in windows and the LightBG setting doesn't
> correctly
>> because the background of the text is black even if the console
> background
>> is white.  Anyone know whats going on?  Thanks.
>>
>> --
>> ==============================
>> Ashot Petrosian
>> University of Texas at Austin, Computer Sciences
>> (views expressed are solely my own)
>> ==============================
>
> Did you try installing readline for windows?
> http://newcenturycomputers.net/projects/readline.html
>

yea I've installed that and ctypes.  The color and tab completion work,  
its just that colored get displayed with black background, it almost works  
so its very frustrating..

-- 
==============================
Ashot Petrosian
University of Texas at Austin, Computer Sciences
(views expressed are solely my own)
==============================


From jgrahn-nntq at algonet.se  Sat Feb 26 20:46:05 2005
From: jgrahn-nntq at algonet.se (Jorgen Grahn)
Date: 27 Feb 2005 01:46:05 GMT
Subject: Converting HTML to ASCII
References: <mailman.3066.1109357511.22381.python-list@python.org>
	<slrnd1v5vv.nhu.jgrahn-nntq@frailea.sa.invalid>
	<7xk6ovbob4.fsf@ruckus.brouhaha.com>
Message-ID: <slrnd229g4.nhu.jgrahn-nntq@frailea.sa.invalid>

On 26 Feb 2005 02:36:31 -0800, Paul Rubin <> wrote:
> Jorgen Grahn <jgrahn-nntq at algonet.se> writes:
>> You should probably do what some other poster suggested -- download
>> lynx or some other text-only browser and make your code execute it
>> in -dump mode to get the text-formatted html. You'll get that
>> working in an hour or so, and then you can see if you need something
>> more complicated.
> 
> Lynx is pathetically slow for large files.  It seems to use a
> quadratic algorithm for remembering where the links point, or
> something.  I wrote a very crude but very fast renderer in C that I
> can post if someone wants it, which is what I use for this purpose.

That may be so, but it's fast enough for all the people who use it as a
general html->plaintext tool, so it's probably good enough for the OP.

w3m and links are other options. They provide better formatting than lynx,
and at least w3m has the -dump option.

I wouldn't mind if there was a reusable library for rendering HTML to text,
from various languages. I'd also like to see one (CSS-aware) for rendering
to troff or Postscript.

/Jorgen

-- 
  // Jorgen Grahn <jgrahn@       Ph'nglui mglw'nafh Cthulhu
\X/                algonet.se>   R'lyeh wgah'nagl fhtagn!


From luismgz at gmail.com  Sat Feb  5 23:08:51 2005
From: luismgz at gmail.com (Luis M. Gonzalez)
Date: 5 Feb 2005 20:08:51 -0800
Subject: An Ode To My Two Loves
References: <mailman.1982.1107624858.22381.python-list@python.org>
Message-ID: <1107662931.185621.122410@c13g2000cwb.googlegroups.com>

Jamey,

Really, you should try to steer clear from your computer from time to
time...
Your mental health is more important than python or ruby, don't lose
it!



From kartic.krishnamurthy at gmail.com  Tue Feb  8 14:19:47 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 8 Feb 2005 11:19:47 -0800
Subject: Python mail filter
In-Reply-To: <4208f1d0$1@news.starhub.net.sg>
References: <4208f1d0$1@news.starhub.net.sg>
Message-ID: <1107890387.721965.9160@l41g2000cwc.googlegroups.com>

I just read your requirement of a pass through...  Writing the email
back into sys.stdout from your script might do the trick of passing it
through to the original intended recipient.



From lbates at syscononline.com  Fri Feb 25 17:14:47 2005
From: lbates at syscononline.com (Larry Bates)
Date: Fri, 25 Feb 2005 16:14:47 -0600
Subject: Splitting strings - by iterators?
In-Reply-To: <pan.2005.02.25.17.31.03.601511@jeremysanders.net>
References: <pan.2005.02.25.15.55.31.77881@jeremysanders.net>
	<Be2dnWSlIL6MxILfRVn-1Q@comcast.com>
	<pan.2005.02.25.17.31.03.601511@jeremysanders.net>
Message-ID: <6MudnRJ3Oe_NPoLfRVn-vg@comcast.com>

By putting them into another file you can just use
.readline iterator on file object to solve your
problem.  I would personally find it hard to work
on a program that had 400,000 lines of data hard
coded into a structure like this, but that's me.

-Larry


Jeremy Sanders wrote:
> On Fri, 25 Feb 2005 10:57:59 -0600, Larry Bates wrote:
> 
> 
>>How did you get the string in memory in the first place?
> 
> 
> They're actually from a generated python script, acting as a saved file
> format, something like:
> 
> interpret("""
> lots of lines
> """)
> another_command()
> 
> Obviously this isn't the most efficient format, but it's nice to
> encapsulate the data and the script into one file.
> 
> Jeremy
> 


From kartic.krishnamurthy at gmail.com  Fri Feb  4 15:20:07 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 4 Feb 2005 12:20:07 -0800
Subject: Possibly OT: Controlling winamp with Python
In-Reply-To: <JZOdnVLIY48-S57fRVn-hA@comcast.com>
References: <JZOdnVLIY48-S57fRVn-hA@comcast.com>
Message-ID: <1107548407.626431.171350@z14g2000cwz.googlegroups.com>

Brent,

Question : how will your python script distinguish between a commercial
and a song?

I can understand if you are writing a streaming client in Python; in
that case you can analyze the audio stream and decide if it is a
commercial or a song/music.

Did you check to see if there is already a Winamp plugin that would
achieve this for you?

Thanks,
-Kartic



From andrea_gavana at tin.it  Sun Feb 27 04:44:04 2005
From: andrea_gavana at tin.it (andrea_gavana at tin.it)
Date: Sun, 27 Feb 2005 10:44:04 +0100
Subject: Controlling Pc From Server?
Message-ID: <420006340000CB7D@ims9c.cp.tin.it>

Hello NG,

        I am trying to find some information about the possibility to control
two (or more) clients (PCs) via a Python application running on a main server.
Ideally, this application should be able to monitor (almost in real time)
the "activity" of these clients (which applications are launched, closed
and so on, if this is even possible, obviously). Does anyone have to share
some information/pointer?

Thank you a lot.

Andrea.




From t-meyer at ihug.co.nz  Tue Feb  1 22:33:14 2005
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Wed, 2 Feb 2005 16:33:14 +1300
Subject: getting data from a port in use
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E801EC8118@its-xchg4.massey.ac.nz>
Message-ID: <ECBA357DDED63B4995F5C1F5CBE5B1E801DAFDF7@its-xchg4.massey.ac.nz>

>>> I am trying to use Python to get the data received at a 
>>> specific port (in use) on my computer. I already tried below
>>> code which seems to hang at the statement accepting
>>> connections. 
>
> Yes. It hangs at accept. I always end up doing end task 
> because it never passes the "accept" statement.

What do you get from wherever you are trying to connect to the port (e.g.
telnet).  Does it connect, or fail to connect?

Note that (as others have said) if you are trying to intercept data from an
existing socket connection, this is not the way to do it.  (This will let
you use a port that another process has already claimed, and accept new
connections to it).

=Tony.Meyer



From jaydonnell at gmail.com  Sun Feb 13 13:02:00 2005
From: jaydonnell at gmail.com (jdonnell)
Date: 13 Feb 2005 10:02:00 -0800
Subject: Second posting - Howto connect to MsSQL
In-Reply-To: <iyMPd.4612$ZZ.1645@newssvr23.news.prodigy.net>
References: <iyMPd.4612$ZZ.1645@newssvr23.news.prodigy.net>
Message-ID: <1108317720.675414.87990@f14g2000cwb.googlegroups.com>

" Since this is (sort of) my second request it must not be an easy
solution.
Are there others using Python to connect MsSQL? "

http://sourceforge.net/projects/mysql-python



From caleb1 at telkomsa.net  Tue Feb  8 23:22:44 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Tue, 08 Feb 2005 23:22:44 -0500
Subject: Basic file operation questions
References: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
	<opsllt9r191js0xs@news.telkomsa.net>
	<mailman.1808.1107431422.22381.python-list@python.org>
	<ctt53b$l5u$00$1@news.t-online.com>
	<opslnm1cge1js0xs@news.telkomsa.net>
	<ctu62q$gud$04$1@news.t-online.com>
	<1107846197.701686.303390@l41g2000cwc.googlegroups.com>
	<7q4Od.753$Sd.170775@newshog.newsread.com>
Message-ID: <opslww36xr1js0xs@news.telkomsa.net>

Marc

I don't know how it is handled, but I expect also that there is an implied  
close().

thanks
Caleb

> When you read a file with that method, is there an implied close() call  
> on the file?  I assume there is, but how is that handled?




From jkjone2002 at att.net  Thu Feb 17 10:11:16 2005
From: jkjone2002 at att.net (john san)
Date: Thu, 17 Feb 2005 10:11:16 -0500
Subject: [newbie]How to install python under DOS and is there any
	Wxpython can be installed under dos?
References: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
	<1108557065.547230.254540@z14g2000cwz.googlegroups.com>
	<b9-dnTQOwoYK647fRVn-2Q@rogers.com>
	<11172sa1sg2svc8@corp.supernews.com>
	<l4OdneC_7ZH2oInfRVn-3A@rogers.com>
	<1108649705.442893.278840@g14g2000cwa.googlegroups.com>
Message-ID: <BdudnbQFX6GHKYnfRVn-3Q@rogers.com>


oh, ya.

"Fuzzyman" <fuzzyman at gmail.com> ????
news:1108649705.442893.278840 at g14g2000cwa.googlegroups.com...
>
> john san wrote:
> > Actually the "windows" running very good under the xbox-NTOS via
> > xboxmediacenter. its just limited functions(not easy to programming
> the
> > "windows" prog.), if we can find WxPython-like can be ported (I can
> import *
> > from it  to my xboxPython) )it will be a great great ......... You
> will have
> > HD screen and web surfing on HDTV and computing on HDTV. think about
> it!
> > That is a real thing the python-like lang. should to do otherwise
> just a
> > garbage(toy).
> >
> >
> >
>
> I assume you mean that without python the Xbox is just a toy......
>
> Regards,
>
> Fuzzy
> http://www.voidspace.org.uk/python/index.shtml
>




From Serge.Orlov at gmail.com  Sat Feb 26 15:06:54 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: Sat, 26 Feb 2005 20:06:54 +0000 (UTC)
Subject: fdups: calling for beta testers
References: <421f97eb$1@news.vo.lu>
	<1109380525.262724.275780@g14g2000cwa.googlegroups.com>
	<422044b9$1@news.vo.lu> <AaidnagE7Yd2Lb3fRVn-qg@powergate.ca>
Message-ID: <cvqksu$25it$1@news.comcor-tv.ru>

Peter Hansen wrote:
> Patrick Useldinger wrote:
>>> (9) Any good reason why the "executables" don't have ".py"
>>> extensions on their names?
>>
>> (9) Because I am lazy and Linux doesn't care. I suppose Windows does?
>
> Unfortunately, yes.  Windows has nothing like the "x" permission
> bit, so you have to have an actual extension on the filename and
> Windows (XP anyway) will check it against the list of extensions
> in the PATHEXT environment variable to determine if it should be
> treated like an executable.
>
> Otherwise you must type "python" and the full filename.

Or use exemaker, which IMHO is the best way to handle this
problem.

  Serge.




From debianfreak at freenet.de  Wed Feb 23 08:17:57 2005
From: debianfreak at freenet.de (Jochen Kaechelin)
Date: Wed, 23 Feb 2005 14:17:57 +0100
Subject: newbie help for mod_python
In-Reply-To: <cvgfe8$mh0$1@eeyore.INS.cwru.edu>
References: <mailman.2943.1109110879.22381.python-list@python.org>
	<cvgfe8$mh0$1@eeyore.INS.cwru.edu>
Message-ID: <200502231417.57821.debianfreak@freenet.de>

Am Mittwoch, 23. Februar 2005 00:29 schrieb Brian Beck:
> Jochen Kaechelin wrote:
> > I run debian sid and apache2 with libapache2-mod-python2.3
> > and I added these lines
> >
> > <Directory /var/www>
> >    AddHandler mod_python .py
> >    PythonDebug On
> > </Directory>
> >
> > in a virtualhost container.
>
> Were those the only lines you added? You also should have
> actually loaded the module somewhere by adding something
> resembling:
>
> LoadModule python_module modules/mod_python.so

Thats done by debian during installation:

Module Name: mod_python.c
Content handlers: yes

-- 
Gugsch Du: http://gissmoh.de


From steven.bethard at gmail.com  Mon Feb 14 02:17:34 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 14 Feb 2005 00:17:34 -0700
Subject: custom classes in sets
In-Reply-To: <mailman.2510.1108363259.22381.python-list@python.org>
References: <mailman.2510.1108363259.22381.python-list@python.org>
Message-ID: <EYOdnUHqx-UVzY3fRVn-og@comcast.com>

vegetax wrote:
> How can i make my custom class an element of a set?
> 
> class Cfile:
>   def __init__(s,path): s.path = path
> 
>   def __eq__(s,other):
>    print 'inside equals'
>    return not os.popen('cmp %s %s' % (s.path,other.path)).read()
> 
>   def __hashcode__(s): return s.path.__hashcode__()
> 
> the idea is that it accepts file paths and construct a set of unique 
> files (the command "cmp" compares files byte by byte.),the files can
> have different paths but the same content
> 
> but the method __eq__ is never called

Seems to be called fine for me:

py> class Cfile:
...     def __eq__(self, other):
...         print 'inside equals'
...         return False
...     def __hash__(self):
...         return 0
...
py> {Cfile():1, Cfile():2}
inside equals
{<__main__.Cfile instance at 0x01166490>: 1, <__main__.Cfile instance at 
0x01166760>: 2}

Note that __eq__ won't be called if the hashes are different:

py> class Cfile:
...     hash = 0
...     def __eq__(self, other):
...         print 'inside equals'
...         return False
...     def __hash__(self):
...         Cfile.hash += 1
...         return Cfile.hash
...
py> {Cfile():1, Cfile():2}
{<__main__.Cfile instance at 0x01166918>: 1, <__main__.Cfile instance at 
0x011668A0>: 2}

Steve


From sjmachin at lexicon.net  Sun Feb 13 17:18:04 2005
From: sjmachin at lexicon.net (John Machin)
Date: 13 Feb 2005 14:18:04 -0800
Subject: builtin functions for and and or?
In-Reply-To: <1108330461.853575.273700@g14g2000cwa.googlegroups.com>
References: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>
	<cuofcj$jvt$02$1@news.t-online.com>
	<1108330461.853575.273700@g14g2000cwa.googlegroups.com>
Message-ID: <1108333084.425349.200140@l41g2000cwc.googlegroups.com>


Michael Hartl wrote:
> I warmly recommend downloading Peter Norvig's Python utilities file
> (http://aima.cs.berkeley.edu/python/utils.py) and putting it on your
> Python path.  (E.g., in bash, put a line like
>
> export PYTHONPATH="/path/to/utilities_directory"
>
> in your .bashrc file.)  The utils.py file defines many useful
> functions, including the ones you want:
>
> # def every(predicate, seq):
> #     """True if every element of seq satisfies predicate.
> #     Ex: every(callable, [min, max]) ==> 1; every(callable, [min,
3])
> ==> 0
> #     """
> #     for x in seq:
> #         if not predicate(x): return False
> #     return True
> #
> # def some(predicate, seq):
> #     """If some element x of seq satisfies predicate(x), return
> predicate(x).
> #     Ex: some(callable, [min, 3]) ==> 1; some(callable, [2, 3]) ==>
0
> #     """
> #     for x in seq:
> #         px = predicate(x)
> #         if px: return px
> #     return False
>

What an interesting mixed API design. The every() function returns True
or False. However the "some" function returns the FIRST fat result if
it's true in the non-boolean sense, otherwise False.

Looks like there could theoretically be scope for two pairs of
functions, one returning strictly True/False, and the other pair
emulating chains of Python 'and's and 'or's.

I.e.
False or 0 or [] evaluates to []
0 or 5 or 6 evaluates to 5
42 and None and True evaluates to None
4 and 5 and 6 evaluates to 6

All very nice, but useful? Dubious. PEPpable? Nah, two thumbs down.

Diez's advice to the OP is sound: if it bothers you that much, mine the
net for, or write, routines that do exactly what you want, and put them
in your own utilities module.



From nhodgson at bigpond.net.au  Mon Feb 28 19:52:56 2005
From: nhodgson at bigpond.net.au (Neil Hodgson)
Date: Tue, 01 Mar 2005 00:52:56 GMT
Subject: Pythonwin: Red squiggley underline and syntax error
References: <juadnQtUmsOo9b7fRVn-tQ@comcast.com>
	<Kfudne3HApR08r7fRVn-2A@comcast.com>
Message-ID: <I1PUd.179195$K7.80116@news-server.bigpond.net.au>

Steven Bethard:

> You've probably mixed tabs with spaces in your indentation somewhere.
> Either replace all tabs with spaces or replace all spaces with tabs.

   You can see what characters are being used with the View | Whitespace
command which shows tabs as arrows and spaces as centred dots.

   Neil




From rbt at athop1.ath.vt.edu  Thu Feb 17 09:29:30 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Thu, 17 Feb 2005 09:29:30 -0500
Subject: os.walk()
Message-ID: <cv29o3$ror$1@solaris.cc.vt.edu>

Could someone demonstrate the correct/proper way to use os.walk() to skip certain 
files and folders while walking a specified path? I've read the module docs and 
googled to no avail and posted here about other os.walk issues, but I think I need to 
back up to the basics or find another tool as this isn't going anywhere fast... I've 
tried this:

for root, dirs, files in os.walk(path, topdown=True):

     file_skip_list = ['file1', 'file2']
     dir_skip_list = ['dir1', 'dir2']

     for f in files:
         if f in file_skip_list
             files.remove(f)

     for d in dirs:
         if d in dir_skip_list:
             dirs.remove(d)

     NOW, ANALYZE THE FILES

And This:

     files = [f for f in files if f not in file_skip_list]
     dirs = [d for d in dirs if dir not in dir_skip_list]

     NOW, ANAYLZE THE FILES

The problem I run into is that some of the files and dirs are not removed while others 
are. I can be more specific and give exact examples if needed. On WinXP, 
'pagefile.sys' is always removed, while 'UsrClass.dat' is *never* removed, etc.


From peter at somewhere.com  Tue Feb 15 10:53:34 2005
From: peter at somewhere.com (Peter Maas)
Date: Tue, 15 Feb 2005 16:53:34 +0100
Subject: replacing ASP/VBScript with Python
In-Reply-To: <37e95mF5biov1U1@individual.net>
References: <cusnon$qhd$1@swifty.westend.com> <cusq6o$t30$1@swifty.westend.com>
	<37e95mF5biov1U1@individual.net>
Message-ID: <cusrgn$11u$1@swifty.westend.com>

Diez B. Roggisch schrieb:
> You did not really give much information of what your application does -
> e.g. for a CMS, I'd strongly recommend a zope based solution. Other apps
> might be better written in other frameworks.

It's a procurement app. Users (employees) can search in a product list
and generate orders to the company's internal or external suppliers.
The orders are stored in a database and emails are generated to the
addresses of the buyer and the suppliers. There is no direct interface
to an erp app (like SAP).

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From qwweeeit at yahoo.it  Mon Feb  7 14:27:55 2005
From: qwweeeit at yahoo.it (qwweeeit)
Date: 7 Feb 2005 11:27:55 -0800
Subject: PySol: using Qt  (as a case study)
References: <2ab23d7a.0502070614.32881704@posting.google.com>
Message-ID: <2ab23d7a.0502071127.33e7fac5@posting.google.com>

It must be the Free Software Foundation that has to take in charge the
problem (as I know it has already done in some cases)...


From caleb.hattingh at gmail.com  Wed Feb  9 01:28:06 2005
From: caleb.hattingh at gmail.com (Caleb Hattingh)
Date: 8 Feb 2005 22:28:06 -0800
Subject: Python versus Perl ?
In-Reply-To: <mailman.2218.1107902435.22381.python-list@python.org>
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
	<hkhc01dnpmmhn980quijqil40653qipdki@4ax.com>
	<cuavn1$bag$1@nntp.msstate.edu>
	<opslwvc2wx1js0xs@news.telkomsa.net>
	<mailman.2218.1107902435.22381.python-list@python.org>
Message-ID: <1107930486.318280.251010@l41g2000cwc.googlegroups.com>

Hi Adam

Thanks for your comments.

> I think the expression you seek is "comparing virtue among whores."

Sure, that's what I was saying, but not quite in as colourfil a manner
:)

> >
> > The problem domains in which I do most of my work (chemical process

> > modelling and simulation) really do require speed.  That's why I
mostly
> > use Delphi (i.e. reasonably fast code) at work.   I believe I know
when
> > speed is and is not an issue, and (by far) most of the time, my
experience
> > is that it is *not*.  So I use Delphi for numerical code and python
for
> > everything else.
>
> Why don't you use C for the numerical work?  Then you can do your
number
> crunching within a c-based python module.  Have your cake and ...

As you might imagine, I think about this constantly.  However, there
are many other issues that make it complicated, such as having to work
in a team where the average guy knows pascal well (we're just a bunch
of chemical engineers), but has never even heard of python.  Plus, were
I to go this type of route, I would almost definitely code the binary
modules in Delphi or FreePascal, make a DLL and use ctypes to call it.
I do not know C and have no desire to learn now :)    On the other
hand, I know pascal quite well.

keep well
Caleb



From carribeiro at gmail.com  Tue Feb  8 07:34:35 2005
From: carribeiro at gmail.com (Carlos Ribeiro)
Date: Tue, 8 Feb 2005 10:34:35 -0200
Subject: empty classes as c structs?
In-Reply-To: <1grnyld.1t8l5kw1nr5aqsN%aleaxit@yahoo.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<mailman.2006.1107658273.22381.python-list@python.org>
	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>
	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>
	<mailman.2049.1107750700.22381.python-list@python.org>
	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com> <4207606E.4040806@iinet.net.au>
	<cu8amb$ufa$1@sea.gmane.org>
	<mailman.2158.1107859833.22381.python-list@python.org>
	<1grnyld.1t8l5kw1nr5aqsN%aleaxit@yahoo.com>
Message-ID: <864d370905020804345876a1d5@mail.gmail.com>

On Tue, 8 Feb 2005 12:01:23 +0100, Alex Martelli <aleaxit at yahoo.com> wrote:
> Nick Coghlan <ncoghlan at iinet.net.au> wrote:
> 
> > > We could use __add__, instead for combining namespaces
> >
> > Update already let's us combine namespaces. To create a new object that merges
> > two namespaces do:
> >    namespace.update(namespace(ns_1), ns_2)
> 
> One thing I'd like to see in namespaces is _chaining_ -- keeping each
> namespace separate but having lookups proceed along the chain.  (The
> best semantics for _bindings_ as opposed to lookups isn't clear though).

Good point. The name 'namespace' kind of imples chaining, in the usual
Pythonic sense... But I feel that by splitting this into two types
(namespace & bunch) we may be making things overly complicated, and
losing some of the power of the argument. Again, just my $0.02 worth.

-- 
Carlos Ribeiro
Consultoria em Projetos
blog: http://rascunhosrotos.blogspot.com
blog: http://pythonnotes.blogspot.com
mail: carribeiro at gmail.com
mail: carribeiro at yahoo.com


From deetsNOSPAM at web.de  Fri Feb 25 08:14:51 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 25 Feb 2005 14:14:51 +0100
Subject: Trees
References: <mailman.3035.1109311254.22381.python-list@python.org>
Message-ID: <388mj5F5k1pveU1@individual.net>

Alex Le Dain wrote:

> Is there a generic "tree" module that can enable me to sort and use
> trees (and nodes). Basically having methods such as .AddNode(),
> .GetAllChildren(), .FindNode() etc.


No. Usually, one uses the built-in python datastructures for this. E.g.

('root', [('child1', None), ('child2', None)])

Or writing a Node-class is also so straightforward that few care about them
being part of the core:

class Node(object):
   def __init__(self, payload, childs=None):
       self.payload = payload
       self.childs = childs

   def depth_first(self):
       if self.childs:
           for child in self.childs:
               for node in child.depth_first():
                   yield node
       yield self.payload



tree = Node('root', [Node('child1'), Node('child2')])

for n in tree.depth_first():
    print n
    
-- 
Regards,

Diez B. Roggisch


From kanenas_ at t_comcast_d.t_net  Tue Feb 15 03:17:23 2005
From: kanenas_ at t_comcast_d.t_net (Kanenas)
Date: Tue, 15 Feb 2005 00:17:23 -0800
Subject: deepcopy chokes with TypeError on dynamically assigned instance
	method
References: <698m01djeu9jqpnvvk64vmc488e5c026im@4ax.com>	<mn0o01hsaq59bg93cfoonej8ocjsnksgal@4ax.com>	<mailman.2379.1108120960.22381.python-list@python.org>
	<haCdnXB6cZOZBpPfRVn-1w@comcast.com>
	<mailman.2468.1108260106.22381.python-list@python.org>
Message-ID: <epb311lnq66914q9mjpu35fb1arejfe9v2@4ax.com>

On Sun, 13 Feb 2005 12:01:42 +1000, Nick Coghlan
<ncoghlan at iinet.net.au> wrote:

>> True.  It wouldn't cause a problem within my __init__, since the 
>> attribute is reassigned after the deepcopy, though should anyone else 
>> deepcopy an instance...  Definitely better that the deepcopy throws the 
>> TypeError.  But why shouldn't we be able to copy a non-method function?
>
>I honestly don't know, although I'm hard-pressed to see how doing so would ever 
>be *useful*. Duplicating *parts* of a function would seem to make sense (to 
>build a new function which is similar, but not identical), but duplicating the 
>whole thing seems rather pointless. Although I guess you could just pickle it 
>and then unpickle the result to make a copy :)
>
It's not so much that copying a function is useful as it would be nice
if copy and deepcopy didn't fail on plain functions, as there are
cases where objects would need to store references to such functions.
Imagine classes implementing operations on functions such as numeric
differentiation and integration (while symbolic differentiation &
integration would probably be better for production code, the example
still stands).  As it is, a little extra work would be needed to
support deepcopying such classes.  And it's always nice to avoid work.

Thanks for your help and feedback on this.


From nobodyatanywheredotcom  Fri Feb 25 19:05:27 2005
From: nobodyatanywheredotcom (Erik Johnson)
Date: Fri, 25 Feb 2005 17:05:27 -0700
Subject: cgi: getting at raw POST data?
Message-ID: <421fbaf9$1@nntp.zianet.com>

I am trying to work with a program that is trying make an HTTP POST of text
data without any named form parameter. (I don't know - is that a normal
thing to do?) I need to write a CGI program that accepts and processes that
data. I'm not seeing how to get at data that's not a named form parameter.

    I wrote a simple CGI program to echo a string representation of  the
cgi.FieldStorage class that's recevied, and one to make an HTTP POST to it
(once with the way I normally encode a "standard" HTML form, and once with
just a multiline string). It doesn't look to me like the FieldStorage class
is exposing anything for me to grab ahold of in the latter case. I don't see
any other likely looking candidates in the cgi module. My program code is
below.  Anyone have any suggestions about how to get at raw POST data (as a
CGI program)?

Thanks for taking the time to read my article! :)

-ej


results of running 'post' each way:

> post form
<html>
  <body>
    <pre>FieldStorage(None, None, [MiniFieldStorage('buckle', 'my shoe'),
MiniFieldStorage('one', 'two')])</pre>
  <body>
<html>


> post other
<html>
  <body>
    <pre>FieldStorage(None, None, [])</pre>
  <body>
<html>


#! /usr/local/bin/python
"post"

import os, sys, time, string
import httplib, urllib

what = sys.argv[1]

server = "localhost"
url    = "/test_POST"
conn   = httplib.HTTPConnection(server)
conn.putrequest('POST', url)

if what == 'form':
    form = { 'one' : 'two', 'buckle' : 'my shoe' }
    DATA = urllib.urlencode(form)
else:
    DATA = """\
line 1
this is my little stream of raw data put into POST without
any parameter name.
"""

conn.putheader('Content-Length', str(len(DATA)) )
conn.endheaders()
conn.send(DATA)

response = conn.getresponse()
text = response.read()
conn.close() # done with current machine

print text



#! /usr/bin/python
"test_POST"

# Python STANDARD INCLUDES
import sys
import cgi
import cgitb; cgitb.enable()


# MAIN
# get stuff out of POST parameters
if __name__ == "__main__":


    # dump out a web page
    print """\
Content-type: text/html

<html>
  <body>
    <pre>%s</pre>
  <body>
<html>
""" % str(cgi.FieldStorage(keep_blank_values=True))







From alan.mcintyre at esrgtech.com  Fri Feb  4 14:32:01 2005
From: alan.mcintyre at esrgtech.com (Alan McIntyre)
Date: Fri, 04 Feb 2005 14:32:01 -0500
Subject: string issue
In-Reply-To: <cu0i3o$jc6$1@solaris.cc.vt.edu>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
Message-ID: <R4QMd.33663$EG1.10366@lakeread04>

I think it's because you're modifying the list as you're iterating over 
it.  Try this:

import time

ips = ['255.255.255.255', '128.173.120.79', '198.82.247.98', 
'127.0.0.1', '255.0.0.0', '255', '128.173.255.34']
ips_new = []
for ip in ips:
     if '255' not in ip:
         ips_new.append(ip)

print ips_new



Or this:

ips_new = [ip for ip in ips if '255' not in ip]
print ips_new


Hope this helps,
Alan McIntyre
http://www.esrgtech.com



rbt wrote:
> Either I'm crazy and I'm missing the obvious here or there is something 
> wrong with this code. Element 5 of this list says it doesn't contain the 
> string 255, when that's *ALL* it contains... why would it think that???
> 
> import time
> 
> ips = ['255.255.255.255', '128.173.120.79', '198.82.247.98', 
> '127.0.0.1', '255.0.0.0', '255', '128.173.255.34']
> 
> for ip in ips:
>     if '255' in ip:
>         try:
>             print "Removing", ip
>             ips.remove(ip)
>         except Exception, e:
>             print e
> 
> print ips
> time.sleep(5)
> 
> Someone tell me I'm going crazy ;)


From news at slalomsk8er.ch  Thu Feb 17 07:53:34 2005
From: news at slalomsk8er.ch (Slalomsk8er)
Date: Thu, 17 Feb 2005 13:53:34 +0100
Subject: Help needed for to build a CGI shell interface. 
Message-ID: <421493CE.9090308@slalomsk8er.ch>

I don't get it with the popen (popen3 or subprocess).

1. How do I establish my pipes?

2. And how do I interact with the pipes (interactive CGI-page)?

Thanks, Dominik


From mahs at telcopartners.com  Thu Feb 17 01:53:00 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 16 Feb 2005 22:53:00 -0800
Subject: sampling items from a nested list
In-Reply-To: <8t2dnQq5sJIZp4nfRVn-tA@comcast.com>
References: <7_adnQhRBYDdV47fRVn-sA@comcast.com>	<mailman.2729.1108602951.22381.python-list@python.org>
	<8t2dnQq5sJIZp4nfRVn-tA@comcast.com>
Message-ID: <cv1eqv$6fl$2@sea.gmane.org>

Steven Bethard wrote:
> Michael Spencer wrote:
> 
>> Steven Bethard wrote:
>>
>>> So, I have a list of lists, where the items in each sublist are of 
>>> basically the same form.  It looks something like:
>>>
>> ...
>>
>>>
>>> Can anyone see a simpler way of doing this?
>>>
>>> Steve
>>
>>
>> You just make these up to keep us amused, don't you? ;-)
> 
> 
> Heh heh.  I wish.  It's actually about resampling data read in the 
> Yamcha data format:
> 
> http://chasen.org/~taku/software/yamcha/
> 
> So each sublist is a "sentence" and each tuple is the feature vector for 
> a "word".  The point is to even out the number of positive and negative 
> examples because support vector machines typically work better with 
> balanced data sets.
> 
>> If you don't need to preserve the ordering, would the following work?:
>>
> [snip]
> 
>>
>>  >>> def resample2(data):
>>  ...     bag = {}
>>  ...     random.shuffle(data)
>>  ...     return [[(item, label)
>>  ...                 for item, label in group
>>  ...                     if bag.setdefault(label,[]).append(item)
>>  ...                         or len(bag[label]) < 3]
>>  ...                            for group in data if not 
>> random.shuffle(group)]
> 
> 
> It would be preferable to preserve ordering, but it's not absolutely 
> crucial.  Thanks for the suggestion!
> 
> STeVe
Maybe combine this with a DSU pattern?  Not sure whether the result would be 
better than what you started with

Michael



From dbasch at yahoo.com  Thu Feb  3 19:27:19 2005
From: dbasch at yahoo.com (Derek Basch)
Date: Thu, 3 Feb 2005 16:27:19 -0800 (PST)
Subject: CGI and HTTP Header Location redirects
Message-ID: <20050204002719.45682.qmail@web20824.mail.yahoo.com>

Hello,

I have been dealing with some strange behavior using CGI, python and an HTTP
Header "Location:" redirect on an Apache 1.3 server.

If I call a CGI script and perform a "Location:" redirect the script seems to
silently run off the tracks immediately after the redirect. For example "0.xml"
and "1.xml" are created when there is no redirect and only "0.xml" is created
when a redirect does occur (see below).

Also, after enabling suEXEC on the apache server the script executes perfectly
with the redirect. Can anyone explain this behavior? I would guess that it is
related to apache user rights but I can't find any reference to such problems
via Google.

Thanks everyone!,
Derek Basch

-------------------------------------------------

#! /usr/bin/python

import sys
import cgitb

class Trainer:
		
	def train(self):
		fs = open("/tmp/0.xml", "w")
		fs.close()
##		print "Location: " + "http://www.yahoo.com" + "\n\n"
		sys.stdout.flush()
		fs = open("/tmp/1.xml", "w")
		fs.close()

def main():
	try:
		cgitb.enable()		
		trainer = Trainer()
		trainer.train()

	except Exception, inst:
		cgitb.handler()
	
if __name__ == '__main__':
	main()



		
__________________________________ 
Do you Yahoo!? 
Take Yahoo! Mail with you! Get it on your mobile phone. 
http://mobile.yahoo.com/maildemo 


From uche.ogbuji at gmail.com  Mon Feb 28 22:01:26 2005
From: uche.ogbuji at gmail.com (uche.ogbuji at gmail.com)
Date: 28 Feb 2005 19:01:26 -0800
Subject: best XSLT processor?
In-Reply-To: <yvgUd.9678$_G.5042@clgrps12>
References: <yvgUd.9678$_G.5042@clgrps12>
Message-ID: <1109646086.046516.52580@o13g2000cwo.googlegroups.com>

Who says 4Suite is buggy?  Do they have any evidence to back that up?
We have a huge test suite, and though 4Suite is by no means the fastest
option, it's quite reliable for XSLT.

The XSLT processor in PyXML is just a very old version of 4XSLT.

--Uche



From anthony_barker at hotmail.com  Fri Feb  4 13:32:22 2005
From: anthony_barker at hotmail.com (Ant)
Date: 4 Feb 2005 10:32:22 -0800
Subject: advice needed for simple python web app
In-Reply-To: <7xis58tgjr.fsf@ruckus.brouhaha.com>
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
	<ctv48p$75$1@eeyore.INS.cwru.edu>
	<N86dnZ7k56I3gJ7fRVn-tg@rogers.com>
	<7xis58reac.fsf@ruckus.brouhaha.com>
	<zsKdnThuwKcpGZ7fRVn-hA@rogers.com>
	<7xis58tgjr.fsf@ruckus.brouhaha.com>
Message-ID: <1107541942.740314.106650@o13g2000cwo.googlegroups.com>


> You might also look at the docs for HTML::Mason (www.masonhq.com) to
> get a look at a reasonably mature template system, even if you don't
> plan to use it (because it's in Perl and not Python).  I'm not sure
if
> CherryPy is directly comparable.  I haven't yet used any of the
Python
> template systems.

Mason is available for python

http://www.myghty.org/



From pobrien at orbtech.com  Sat Feb 19 16:46:07 2005
From: pobrien at orbtech.com (Pat)
Date: 19 Feb 2005 13:46:07 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr> <cv7k8e$4pa$03$1@news.t-online.com>
	<cv7m2m$gp$1@usenet.otenet.gr> <cv7nh1$b57$03$1@news.t-online.com>
	<cv7r15$lhm$1@usenet.otenet.gr> <cv7vte$t1g$01$1@news.t-online.com>
Message-ID: <1108849567.136885.141960@z14g2000cwz.googlegroups.com>

Diez B. Roggisch wrote:
>
> >> Just out of curiousity: How many python extensions are you
planning to
> >> write?
> >
> > I estimate 10 to 100, depending on abstractional capabilities of
the
> > extension system.
> >
> >> And how many lines of pure python code have you written in your
life?
> >
> > 0 (zero).
>
> Awesome. Without any lines of code written, you have already
identified the
> areas where python lacks features that have to be overcome with
C-written
> extensions. As usual, I stand with my mouth agape over your
near-psychic
> abilities to analyze even the complexest matters without any actual
> fiddling with the nitty gritty details.

If you put yourself into the shoes of someone who decides to use a
Python product that requires compiling, and that product contains C
extensions that also need compiling, you'll see that it doesn't matter
whether or not that individual has actually written a single line of
Python themselves.  If the compiling process is not easy, then that
user will be forced to fiddle with nitty gritty details about which
they'd rather remain ignorant.

On Linux, I've installed and used/compiled products in a variety of
languages in which I've never written a single line of source code
myself.  In most cases the process works fairly well.  When it doesn't,
I'm forced to fiddle with nitty gritty details about which I'd rather
remain ignorant.  The result is usually a good deal of frustration and
anger on my part.

On Windows, most users are used to installing precompiled binary
packages, rather than compiling from source.  When you do have to
compile from source, it often requires you to fiddle with nitty gritty
details about which you'd rather remain ignorant.  The less fiddling
required, the happier the user will be, and the easier it will be for
that product to get adopted on that platform.  No psychic abilities are
required.  No Python abilities are required, either, for that matter.
;-)

--
Patrick K. O'Brien
Orbtech    http://www.orbtech.com
Schevo     http://www.schevo.org
Pypersyst  http://www.pypersyst.org



From john at grulic.org.ar  Fri Feb 11 16:00:52 2005
From: john at grulic.org.ar (John Lenton)
Date: Fri, 11 Feb 2005 18:00:52 -0300
Subject: check if object is number
In-Reply-To: <66WdnbJbuf5yj5DfRVn-iA@comcast.com>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
	<374ho0F560ughU1@individual.net>
	<66WdnbJbuf5yj5DfRVn-iA@comcast.com>
Message-ID: <20050211210051.GA4186@grulic.org.ar>

On Fri, Feb 11, 2005 at 01:17:55PM -0700, Steven Bethard wrote:
> George Sakkis wrote:
> >"Steven Bethard" <steven.bethard at gmail.com> wrote in message
> >news:gcidnb9g_ojxnpDfRVn-tA at comcast.com...
> >
> >>Is there a good way to determine if an object is a numeric type?
> >
> >In your example, what does your application consider to be numeric?
> 
> Well, here's the basic code:
> 
> def f(max=None):
>     ...
>     while max is None or n <= max:
>         ...
>         # complicated incrementing of n
> 
> So for 'max', technically all I need is <= support.  However, the code 
> also depends on the fact that after incrementing 'n' enough, it will 
> eventually exceed 'max'.  Currently, ints, longs, floats, and Decimals 
> will all meet this behavior.  But I'd rather not specify only those 4 
> (e.g. with a typecheck), since someone could relatively easily create 
> their own new numeric type with the same behavior.  Do you know a better 
> way to test for this kind of behavior?

Why don't you express just this need as an assertion?

    assert 0 <= max <= max + 1, 'Argument must not be zany'

(or whatever error message is suitable)

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
<Silvrbear> Oxymorons?  I saw one yesterday - the pamphlet on "Taco Bell
            Nutritional Information"
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From devnull at joreybump.com  Thu Feb  3 09:22:39 2005
From: devnull at joreybump.com (Jorey Bump)
Date: Thu, 03 Feb 2005 14:22:39 GMT
Subject: Popularizing SimpleHTTPServer and CGIHTTPServer
References: <1107412654.121488.157070@c13g2000cwb.googlegroups.com>
Message-ID: <Xns95F25F64B1D31devnulljoreybumpcom@199.45.49.11>

"Michele Simionato" <michele.simionato at gmail.com> wrote in 
news:1107412654.121488.157070 at c13g2000cwb.googlegroups.com:

> Just submitted a recipe with this goal in mind:
> 
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/365606

You may want to warn people that if they run those commands in their home 
directory, they will instantly share all of their data with anyone that can 
access the machine. Because the server runs as the user, it will have 
permission to serve all of the files in the directory. I'd recommend that 
they cd into a directory created specifically for the purpose of testing.

Does anyone know how to use SimpleHTTPServer to:

1. Support virtual hosts?

2. Support SSL?

I'd like to use SimpleHTTPServer to create some simple reporting utilities, 
but can't get past these two points. Is there a NotSoSimpleHTTPServer?


From simon.brunning at gmail.com  Mon Feb 21 07:13:48 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Mon, 21 Feb 2005 12:13:48 +0000
Subject: gui scripting
In-Reply-To: <1108644499.036064.47210@z14g2000cwz.googlegroups.com>
References: <1108381881.828494.98340@c13g2000cwb.googlegroups.com>
	<gm27e2-m6i.ln1@lairds.us>
	<3c18c08f.0502142309.3e52fdbe@posting.google.com>
	<1108644499.036064.47210@z14g2000cwz.googlegroups.com>
Message-ID: <8c7f10c60502210413783d37ee@mail.gmail.com>

On 17 Feb 2005 04:48:19 -0800, Tonino <tonino.greco at gmail.com> wrote:
> thanks - am already involved in a process to modify winguiauto.py  -
> this is a GREAT start but we need more control and better handleing ;)

Can you be more specific?

> Thanks for the WATSUP site - will check on this as well ;)

WATSUP uses winguiauto.py.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From harlinseritt at yahoo.com  Wed Feb 23 21:31:34 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 23 Feb 2005 18:31:34 -0800
Subject: How to write a ping client
In-Reply-To: <lI-dnU2WevDWqIbfRVn-hg@powergate.ca>
References: <1109039706.092671.137360@f14g2000cwb.googlegroups.com>
	<421a9d54$0$44652$a1866201@visi.com>
	<1109068125.070219.54510@o13g2000cwo.googlegroups.com>
	<lI-dnU2WevDWqIbfRVn-hg@powergate.ca>
Message-ID: <1109212294.128292.119680@l41g2000cwc.googlegroups.com>

?



From robin at reportlab.com  Tue Feb 15 12:33:51 2005
From: robin at reportlab.com (Robin Becker)
Date: Tue, 15 Feb 2005 17:33:51 +0000
Subject: customizing metaclass constructed classes
Message-ID: <4212327F.20901@chamonix.reportlab.co.uk>

I have a set of classes for database access which are constructed using a 
special metaclass and base class.

so in the base module

#base.py
class M(type):
    def __init__(cls, name, bases, dict):
       super(M, cls).__init__(name, bases, dict)
       for f in dict['_fieldDefs']:
           #create special property based on the field def
           ....

class A(object):
    __metaclass__ = M
    _fieldDefs = []

    #base methods
    ......

in the database module we use the above
eg

#database.py
class C(A):
   _fieldDefs =[
     IntColumn('id',primaryKey=1,allowNull=0),
     TextColumn('name',allowNull=0,size=50),
     TextColumn('description',allowNull=1,size=50),
     ]

Now to my question: can I change the definition of the client class C at run 
time? I want to do something like add another element to C's _fieldDefs and then 
get it to go through the construction phase provided by M. It's clearly 
pointless for me to try something like

from database import C
C._fieldDefs.append(....)

as C is constructed by the import.
I either have to delay C's construction or reconstruct it.

Would something like this do?

def reconstruct():
     import database
     class C(database.C):
       _fieldDefs = database.C._fieldDefs+[......]
     database.C = C

Is there a better way to do this which preserves more of C's original identity? 
I suppose I want to call the metaclass initialization again, but can't see a way 
to do that.
-- 
Robin Becker



From peter at engcorp.com  Tue Feb  1 11:36:55 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 01 Feb 2005 11:36:55 -0500
Subject: The next Xah-lee post contest
In-Reply-To: <sqasv0petsjfr0qb9u7e1i30n8mrjl3t78@4ax.com>
References: <mailman.1568.1107005758.22381.python-list@python.org>
	<ctg6qn$q63$1@solaris.cc.vt.edu>
	<mailman.1572.1107009638.22381.python-list@python.org>
	<e9lpv0tk63k0v7v1lctt0d77f92ub48bl3@4ax.com>
	<20050130114008.797088857.whereU@now.com>
	<mailman.1602.1107115028.22381.python-list@python.org>
	<1107137465.973491.42050@f14g2000cwb.googlegroups.com>
	<fMpLd.101045$Jk5.4448@lakeread01>
	<sqasv0petsjfr0qb9u7e1i30n8mrjl3t78@4ax.com>
Message-ID: <Q7ednbtYIue5LWLcRVn-2Q@powergate.ca>

Arthur wrote:
> Steve Holden <steve at holdenweb.com> wrote:
>>Would there, I wonder, be any enthusiasm for a "Best Xah Lee impression" 
>>prize at PyCon?
> 
> And the rules of the game, if he shows?  

Arthur, if Xah Lee shows up at Pycon, he most definitely will
not be giving the best impression...

-Peter


From steven.bethard at gmail.com  Wed Feb 16 01:50:12 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 15 Feb 2005 23:50:12 -0700
Subject: __new__ does not call __init__ as described in descrintro.html
 (WAS: Can __new__ prevent __init__ from being called?)
In-Reply-To: <cuu6qb$c21$1@panix2.panix.com>
References: <pvWdnUJ3hIROBo_fRVn-jw@comcast.com>
	<cuu6qb$c21$1@panix2.panix.com>
Message-ID: <-4qdnffOueK5cI_fRVn-uQ@comcast.com>

Aahz wrote:
> In article <pvWdnUJ3hIROBo_fRVn-jw at comcast.com>,
> Steven Bethard  <steven.bethard at gmail.com> wrote:
> 
>>Yeah, I saw the same thing in playing around with this.  Don't know
>>what to make of it.  I wonder if we should file a documentation bug?  I
>>can't find __new__ explained anywhere in the Language Reference.  Can
>>documentation bugs be filed for descrintro.html?
> 
> Absolutely!  And they're especially welcome if they contain suggested
> replacement text.

Cool.  I added a documentation bug:

http://sourceforge.net/tracker/?func=detail&aid=1123716&group_id=5470&atid=105470

Steve


From peter at engcorp.com  Sun Feb 13 08:57:58 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sun, 13 Feb 2005 08:57:58 -0500
Subject: For American numbers
In-Reply-To: <420efc57$0$5212$7a628cd7@news.club-internet.fr>
References: <420e7376$1@nntp0.pdx.net> <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
	<420efc57$0$5212$7a628cd7@news.club-internet.fr>
Message-ID: <sYSdnXnZq4PCwJLfRVn-uA@powergate.ca>

Pierre Hanser wrote:
> Peter Hansen wrote:
> 
>> Scott David Daniels wrote:
>>
>>> Kind of fun exercise (no good for British English).
>>>
>>>     def units(value, units='bytes'):
>>>         magnitude = abs(value)
>>>         if magnitude >= 1000:
>>>             for prefix in ['kilo mega giga tera peta '
>>>                            'exa zetta yotta').split():
>>>                 magnitude /= 1000.
>>>                 if magnitude < 1000.:
>>>                     break
>>
>>
>>
>> Only for hard drive manufacturers, perhaps.
>>
>> For the rest of the computer world, unless I've missed
>> a changing of the guard or something, "kilo" is 1024
>> and "mega" is 1024*1024 and so forth...
> 
> even for cpu frequency?

I don't think so.  But who cares?  CPU frequency, apart
from being fairly meaningless anyway, doesn't cover
enough ground for anyone to need a routine like the
above to deal with it.

Anyway, I was focusing on the "units='bytes'" part above
which suggested a byte-oriented focus for the routine,
and CPU frequencies aren't measured in bytes...

-Peter


From steven.bethard at gmail.com  Fri Feb 25 23:53:36 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 25 Feb 2005 21:53:36 -0700
Subject: Which module is "set " in?
In-Reply-To: <mailman.3080.1109393264.22381.python-list@python.org>
References: <mailman.3080.1109393264.22381.python-list@python.org>
Message-ID: <xN-dnQs_WL5Tnb3fRVn-3g@comcast.com>

Anthony Liu wrote:
> I want to use the set function like
> 
>     mylist = ['a', 'b', 'b', 'd', 'e', 'a']
>     myset  = set (mylist)
> 
> But I don't know what to import, I tried sys, sets,
> they don't work.

If you're using Python 2.4, they're builtin.  If you're using Python 
2.3, you'll probably want to do something like:
     from sets import Set as set
Python's before 2.3 do not have a set type.

> What's the easy way to find out the module that
> contains a particular function?

Perhaps the documentation index?

http://docs.python.org/lib/genindex.html

Steve


From knight at baldmt.com  Sun Feb 13 10:33:29 2005
From: knight at baldmt.com (knight at baldmt.com)
Date: 13 Feb 2005 07:33:29 -0800
Subject: SCons build tool speed
References: <SBsPd.4406$ZZ.3056@newssvr23.news.prodigy.net>
	<zEGPd.159460$K7.151265@news-server.bigpond.net.au>
Message-ID: <1108308809.895231.157110@o13g2000cwo.googlegroups.com>

Hi Neil, ted, et al.--

> > How does the speed of the Scons build tool compare with Ant?
> > Right now with out Ant builds take around an hour. Hoping to
> > speed that up.
>
> Scons emphasises accuracy over speed and is normally a little
> slower than other build tools although still fast enough for most
> purposes. One cause of slowness is that it reads the source files,
> traces include files and checksums them all rather than relying
> on file times. There are some things you can do to speed it up:
> http://www.scons.org/cgi-bin/wiki/GoFastButton

In anticipation of the next release of SCons, we've been doing
a *lot* of work on profiling the performance and eliminating
bottlenecks.

It turns out that scanning the source files and performing the MD5
calculation is not the dominant factor that we've all assumed it is.
There were some other inefficiencies in some of our algorithms that
were much more significant, including some unnecessary disk scans,
recomputing the same dependencies for every target in a list of
targets generated by one command, and repeated just-in-time creation
of some internal objects that could be created just once and cached.

That said, SCons will never be as fast as Make, because it *is*
doing more for you under the covers.  Although the next version
won't necessarily speed up every configuration (the bottlenecks
are extremely configuration dependent), it should be a significant
improvement for many configurations out there.

        --SK



From juranich at barbet.tucson.saic.com  Fri Feb  4 13:13:19 2005
From: juranich at barbet.tucson.saic.com (Steve Juranich)
Date: Fri, 04 Feb 2005 11:13:19 -0700
Subject: returning True, False or None 
In-Reply-To: Message from Steven Bethard <steven.bethard@gmail.com> of "Fri,
	04 Feb 2005 10:48:44 MST." <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com> 
Message-ID: <200502041813.j14IDKqZ015361@nemesis.tucson.saic.com>

> This has a light code smell for me though -- can anyone see a simpler 
> way of writing this?

How's about:

def ntf(x, y):
     if x is None and y is None: return None
     if x == True or y == True: return True
     return False
# Then...
reduce(ntf, <list of stuff>)

You might need to make sure that you initialize your "reduce" call the
right way with the optional third argument.

HTH

-- 
Stephen W. Juranich
Science Applications Intl. Corp. (SAIC)
Tucson, AZ


From joakim.storck at home.se  Wed Feb  2 15:08:17 2005
From: joakim.storck at home.se (Joakim Storck)
Date: 2 Feb 2005 12:08:17 -0800
Subject: Hash of class from instance
References: <1107363342.531396.238350@g14g2000cwa.googlegroups.com>
	<Xns95F1AE4AFCC36duncanrcpcouk@127.0.0.1>
	<1107364617.371795.13740@l41g2000cwc.googlegroups.com>
	<36cj80F4ue5biU1@individual.net>
	<UqidnSE1QIXrtJzfRVn-ug@comcast.com>
	<1107373593.789905.168850@o13g2000cwo.googlegroups.com>
	<just-AE1086.20495202022005@news1.news.xs4all.nl>
Message-ID: <1107374897.854447.273660@z14g2000cwz.googlegroups.com>

Simply because it didn't occur to me. So now I have

>>> class A: pass
...
>>> d = {A:[A(),A(),A()]}
>>> a = d[A].pop()
>>> a
<__main__.A instance at 0x00F09A58>
>>> 

Thanks all!

/Joakim



From porterboy76 at yahoo.com  Fri Feb 25 08:36:23 2005
From: porterboy76 at yahoo.com (porterboy76 at yahoo.com)
Date: 25 Feb 2005 05:36:23 -0800
Subject: split a directory string into a list
Message-ID: <1109338583.168229.297760@z14g2000cwz.googlegroups.com>

QUESTION:

How do I split a directory string into a list in Python, eg.

'/foo/bar/beer/sex/cigarettes/drugs/alcohol/'

becomes

['foo','bar','beer','sex','cigarettes','drugs','alcohol']

I was looking at the os.path.split command, but it only seems to
separate the filename from the path (or am I just using it wrong?). I
don't want to do it manually if I can help it, as there will have to be
exceptions for the cases where there is (not) a trailing (leading)
slash, or escape sequences involving /. Is there a built in command for
this?



From max at alcyone.com  Wed Feb  2 02:12:57 2005
From: max at alcyone.com (Erik Max Francis)
Date: Tue, 01 Feb 2005 23:12:57 -0800
Subject: How do you do arrays
In-Reply-To: <bqt001dcv8gcs35elgjf5bbkdc217f5ia2@4ax.com>
References: <tbunce-0102051052450001@192.168.1.12>
	<1107284817.848551.79000@c13g2000cwb.googlegroups.com>
	<tbunce-0102051218150001@192.168.1.12>
	<JRRLd.132071$w62.80266@bgtnsc05-news.ops.worldnet.att.net>
	<1107291792.287774.90620@z14g2000cwz.googlegroups.com>
	<bqt001dcv8gcs35elgjf5bbkdc217f5ia2@4ax.com>
Message-ID: <QNednRAE4sLk4J3fRVn-vA@speakeasy.net>

Dennis Lee Bieber wrote:

> 	Classic BASIC actually splits the difference.
> 
> dim a(10)
> 
> allocates 11 elements, indexed 0..10 -- but most classes tend to ignore
> element 0, and algorithms are as if only 10 elements exist starting at
> 1.

Basic also has the OPTION BASE instruction, which affects that.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   War is like love, it always finds a way.
   -- Bertolt Brecht


From antonmuhin at rambler.ru  Fri Feb 18 09:51:05 2005
From: antonmuhin at rambler.ru (anton muhin)
Date: Fri, 18 Feb 2005 17:51:05 +0300
Subject: [perl-python] exercise: partition a list by equivalence
In-Reply-To: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
Message-ID: <37mdmqF5fcvdpU1@individual.net>

Xah Lee wrote:
> here's another interesting algorithmic exercise, again from part of a
> larger program in the previous series.
> 
> Here's the original Perl documentation:
> 
> =pod
> 
> merge($pairings) takes a list of pairs, each pair indicates the
> sameness
> of the two indexes. Returns a partitioned list of same indexes.
> 
> For example, if the input is
> merge( [ [1,2], [2,4], [5,6] ] );
> 
> that means 1 and 2 are the same. 2 and 4 are the same. Therefore
> 1==2==4. The result returned is
> 
> [[4,2,1],[6,5]];
> 
> (ordering of the returned list and sublists are not specified.)
> 
> =cut

Almost a joke:

from numarray import *

def merge(*pairs):
   flattened = reduce(tuple.__add__, pairs, tuple())
   m, M = min(flattened), max(flattened)

   d = M - m + 1
   matrix = zeros((d, d), type = Bool)

   for x, y in pairs:
     X, Y = x - m, y - m

     matrix[X, X] = 1
     matrix[X, Y] = 1
     matrix[Y, X] = 1
     matrix[Y, Y] = 1

   while True:
     next = greater(dot(matrix, matrix), 0)
     if alltrue(ravel(next == matrix)):
       break
     matrix = next

   results = []
   for i in range(d):
     eqls, = nonzero(matrix[i])
     if eqls.size():
       if i == eqls[0]:
         results.append(tuple(x + m for x in eqls))

   return results

Disclaimer: I'm not an expert in numarray and suppose the something can 
be dramatically imporved.


From bokr at oz.net  Fri Feb 25 16:07:27 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 25 Feb 2005 21:07:27 GMT
Subject: exclude binary files from os.walk
References: <ct94j7$15a$1@solaris.cc.vt.edu>
	<kridnVetVMJFu2XcRVn-qg@rogers.com>
Message-ID: <421f9256.52068390@news.oz.net>

On Wed, 26 Jan 2005 18:25:09 -0500, "Dan Perl" <danperl at rogers.com> wrote:

>
>"rbt" <rbt at athop1.ath.vt.edu> wrote in message 
>news:ct94j7$15a$1 at solaris.cc.vt.edu...
>> Is there an easy way to exclude binary files (I'm working on Windows XP) 
>> from the file list returned by os.walk()?
>>
>> Also, when reading files and you're unsure as to whether or not they are 
>> ascii or binary, I've always thought it safer to 'rb' on the read, is this 
>> correct... and if so, what's the reasoning behind this? Again all of this 
>> pertains to files on Windows XP and Python 2.4
>
>Please clarify: is your question about identifying binary (non-ascii) files 
>or about using os.walk? 
>
>
I have a feeling it's about walking directories and identifying which files
to should be "cooked" (to normalize line endings when opened and read).

Regards,
Bengt Richter


From alanmk at hotmail.com  Tue Feb 15 08:20:51 2005
From: alanmk at hotmail.com (Alan Kennedy)
Date: Tue, 15 Feb 2005 13:20:51 +0000
Subject: parsing IMAP responses?
In-Reply-To: <4211261c$0$44604$a1866201@visi.com>
References: <42111b20$0$44604$a1866201@visi.com>
	<7x7jlazsyf.fsf@ruckus.brouhaha.com>
	<4211261c$0$44604$a1866201@visi.com>
Message-ID: <BCmQd.47743$Z14.33529@news.indigo.ie>

[Grant Edwards]
 >>>Is there a library somewhere that impliments the IMAP protocol
 >>>syntax?

[Paul Rubin]
 >>It's very messy.

[Grant Edwards]
 > It sure is.  You'd think something intended to be
 > machine-readable would be easier to parse.

IMHO, email is the most disgracefully badly spec'ced "application" in 
existence: I'm sure the average modern-day scr1pt k1dd13 could do better.

SMTP: Have you ever tried to bounce processing? PITA.

POP: No virtual hosting support.

IMAP: You are in a twisty maze of passages, each slightly different .....

It's no wonder the spammers can ply their trade with such ease.

grumpily-y'rs,

-- 
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan


From ncoghlan at iinet.net.au  Wed Feb  2 08:04:13 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Wed, 02 Feb 2005 23:04:13 +1000
Subject: access to serial port
In-Reply-To: <ctqh3j$nj$1@news.onet.pl>
References: <ctqh3j$nj$1@news.onet.pl>
Message-ID: <4200CFCD.7030203@iinet.net.au>

Pawe? Chrobak wrote:
> Hi
> 
> How to take access to serial port (rs232) ??
> Is't possible??  Just tell me guy's where I can take o look

The same place you should always look - Google.

Keywords: python serial

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From simon.anders at uibk.ac.at  Tue Feb  8 08:26:18 2005
From: simon.anders at uibk.ac.at (Simon Anders)
Date: Tue, 08 Feb 2005 14:26:18 +0100
Subject: python connect to server using SSH protocol
In-Reply-To: <mailman.2174.1107867553.22381.python-list@python.org>
References: <1107850655.289129.94880@o13g2000cwo.googlegroups.com>
	<mailman.2174.1107867553.22381.python-list@python.org>
Message-ID: <4208bdfa$1@sia.uibk.ac.at>

Hi

Laszlo Zsolt Nagy wrote:
> ajikoe at gmail.com wrote:
> 
>> How can python connect to server which use SSH protocol?
>> Is it easy since my python has to run third party vendor, write data,
>> read data inside the server (supercomputer).
>>  
>>
> In advance, I'm not sure if I understood your problem.  SSH is clearly a 
> remote
> shell. You will be able to execute other programs on the remote computer.
> Is is suitable to use this:
> 
> child_stdin,child_stdout,child_stderr =  os.popen2('ssh -l my_username  
> my_host')

This is what I was about to reply as well. But I did a short test 
program and encountered a problem:

import os
fi, foe = os.popen4 ('ssh dopey')
print >>fi, 'ls'
fi.close ()  # <-- this is annoying
for line in foe:
    print line,
foe.close ()

The above connects to a server, passes the command 'ls', which is 
executed there, and prints the returned result.

However, reading from foe succeeds only if fin has been closed before. 
An fi.flush() seems to be not sufficient. But if one wants Python to 
interactivly communicate with some shell on a remote machine, it is 
inconvenient to have to close and reopen the connection all the time.

There should be a better way.

    Simon


From mail at tuxipuxi.org  Tue Feb  1 09:40:40 2005
From: mail at tuxipuxi.org (Michael Goettsche)
Date: Tue, 1 Feb 2005 15:40:40 +0100
Subject: Go visit Xah Lee's home page
In-Reply-To: <opslhry3yp6yt6e7@news.cisco.com>
References: <opslhry3yp6yt6e7@news.cisco.com>
Message-ID: <200502011540.40216.mail@tuxipuxi.org>

On Tuesday 01 February 2005 01:07, aurora wrote:
> Let's stop discussing about the perl-python non-sense. It is so boring.
>
> For a break, just visit Mr Xah Lee's personal page
> (http://xahlee.org/PageTwo_dir/Personal_dir/xah.html). You'll find lot of
> funny information and quotes from this queer personality. Thankfully no
> perl-python stuff there.
>
> Don't miss Mr. Xah Lee's recent pictures at
>
>    http://xahlee.org/PageTwo_dir/Personal_dir/mi_pixra.html
>
> My favor is the last picture. Long haired Xah Lee sitting contemplatively
> in the living room. The caption says "my beautiful hair, fails to resolve
> the problems of humanity. And, it is falling apart by age."

I don't get why you guys blame Xah Lee as a person. 
Ok, he posts some bullshit, but that doesn't make him a bad person. Read the 
box about George Bush on his Homepage.. it shows that he is a well-thinking 
person. So, don't blame him in general.

Michael


From nospam at nospam.fr  Thu Feb 10 10:28:05 2005
From: nospam at nospam.fr (jean-michel)
Date: Thu, 10 Feb 2005 16:28:05 +0100
Subject: wxgrid multiline cell editor
References: <420ad1b9$1_2@news.tm.net.my>
Message-ID: <cufubk$1su$1@news.tiscali.fr>

"James" <c00lways at gmail.com> a ?crit dans le message de
news:420ad1b9$1_2 at news.tm.net.my...
> wxpython 2.5.3
> anyone know how to make a multiline cell editor for wxgrid?

Hello,

You can do that by a "wxGridCellAutoWrapStringEditor".
You can test it by modifying GridSimple.py in the demo by adding (at line 24
in my version):
        self.SetRowSize(1, 45)
        self.SetCellEditor(1, 1, wxGridCellAutoWrapStringEditor())
Save it and now, when you launch the gridsimple in the demo (it's in core
windows control), you can enter multiple lines in the cell containing
"Another cell". It works in 2.4.2.4. I think it should also in 2.5.

I join the whole program.
Have fun.
++jm

#---------------------------------------------------------------
from wxPython.wx import *
from wxPython.grid import *
from wxPython.lib.mixins.grid import wxGridAutoEditMixin

#---------------------------------------------------------------------------

class SimpleGrid(wxGrid): ##, wxGridAutoEditMixin):
    def __init__(self, parent, log):
        wxGrid.__init__(self, parent, -1)
        ##wxGridAutoEditMixin.__init__(self)
        self.log = log
        self.moveTo = None

        EVT_IDLE(self, self.OnIdle)

        self.CreateGrid(25, 25) #, wxGrid.wxGridSelectRows)
        ##self.EnableEditing(False)

        # simple cell formatting
        self.SetColSize(3, 200)
        self.SetRowSize(4, 45)
        self.SetCellValue(0, 0, "First cell")
        self.SetCellValue(1, 1, "Another cell")
        self.SetRowSize(1, 45)
        self.SetCellEditor(1, 1, wxGridCellAutoWrapStringEditor())
        self.SetCellValue(2, 2, "Yet another cell")
        self.SetCellValue(3, 3, "This cell is read-only")
        self.SetCellFont(0, 0, wxFont(12, wxROMAN, wxITALIC, wxNORMAL))
        self.SetCellTextColour(1, 1, wxRED)
        self.SetCellBackgroundColour(2, 2, wxCYAN)
        self.SetReadOnly(3, 3, True)

        self.SetCellEditor(5, 0, wxGridCellNumberEditor(1,1000))
        self.SetCellValue(5, 0, "123")
        self.SetCellEditor(6, 0, wxGridCellFloatEditor())
        self.SetCellValue(6, 0, "123.34")
        self.SetCellEditor(7, 0, wxGridCellNumberEditor())

        self.SetCellValue(6, 3, "You can veto editing this cell")


        # attribute objects let you keep a set of formatting values
        # in one spot, and reuse them if needed
        attr = wxGridCellAttr()
        attr.SetTextColour(wxBLACK)
        attr.SetBackgroundColour(wxRED)
        attr.SetFont(wxFont(10, wxSWISS, wxNORMAL, wxBOLD))

        # you can set cell attributes for the whole row (or column)
        self.SetRowAttr(5, attr)

        self.SetColLabelValue(0, "Custom")
        self.SetColLabelValue(1, "column")
        self.SetColLabelValue(2, "labels")

        self.SetColLabelAlignment(wxALIGN_LEFT, wxALIGN_BOTTOM)

        #self.SetDefaultCellOverflow(False)
        #r = wxGridCellAutoWrapStringRenderer()
        #self.SetCellRenderer(9, 1, r)

        # overflow cells
        self.SetCellValue( 9, 1, "This default cell will overflow into
neighboring cells, but not if you turn overflow off.");
        self.SetCellSize(11, 1, 3, 3);
        self.SetCellAlignment(11, 1, wxALIGN_CENTRE, wxALIGN_CENTRE);
        self.SetCellValue(11, 1, "This cell is set to span 3 rows and 3
columns");


        editor = wxGridCellTextEditor()
        editor.SetParameters('10')
        self.SetCellEditor(0, 4, editor)
        self.SetCellValue(0, 4, "Limited text")


        # test all the events
        EVT_GRID_CELL_LEFT_CLICK(self, self.OnCellLeftClick)
        EVT_GRID_CELL_RIGHT_CLICK(self, self.OnCellRightClick)
        EVT_GRID_CELL_LEFT_DCLICK(self, self.OnCellLeftDClick)
        EVT_GRID_CELL_RIGHT_DCLICK(self, self.OnCellRightDClick)

        EVT_GRID_LABEL_LEFT_CLICK(self, self.OnLabelLeftClick)
        EVT_GRID_LABEL_RIGHT_CLICK(self, self.OnLabelRightClick)
        EVT_GRID_LABEL_LEFT_DCLICK(self, self.OnLabelLeftDClick)
        EVT_GRID_LABEL_RIGHT_DCLICK(self, self.OnLabelRightDClick)

        EVT_GRID_ROW_SIZE(self, self.OnRowSize)
        EVT_GRID_COL_SIZE(self, self.OnColSize)

        EVT_GRID_RANGE_SELECT(self, self.OnRangeSelect)
        EVT_GRID_CELL_CHANGE(self, self.OnCellChange)
        EVT_GRID_SELECT_CELL(self, self.OnSelectCell)

        EVT_GRID_EDITOR_SHOWN(self, self.OnEditorShown)
        EVT_GRID_EDITOR_HIDDEN(self, self.OnEditorHidden)
        EVT_GRID_EDITOR_CREATED(self, self.OnEditorCreated)



    def OnCellLeftClick(self, evt):
        self.log.write("OnCellLeftClick: (%d,%d) %s\n" %
                       (evt.GetRow(), evt.GetCol(), evt.GetPosition()))
        evt.Skip()

    def OnCellRightClick(self, evt):
        self.log.write("OnCellRightClick: (%d,%d) %s\n" %
                       (evt.GetRow(), evt.GetCol(), evt.GetPosition()))
        evt.Skip()

    def OnCellLeftDClick(self, evt):
        self.log.write("OnCellLeftDClick: (%d,%d) %s\n" %
                       (evt.GetRow(), evt.GetCol(), evt.GetPosition()))
        evt.Skip()

    def OnCellRightDClick(self, evt):
        self.log.write("OnCellRightDClick: (%d,%d) %s\n" %
                       (evt.GetRow(), evt.GetCol(), evt.GetPosition()))
        evt.Skip()

    def OnLabelLeftClick(self, evt):
        self.log.write("OnLabelLeftClick: (%d,%d) %s\n" %
                       (evt.GetRow(), evt.GetCol(), evt.GetPosition()))
        evt.Skip()

    def OnLabelRightClick(self, evt):
        self.log.write("OnLabelRightClick: (%d,%d) %s\n" %
                       (evt.GetRow(), evt.GetCol(), evt.GetPosition()))
        evt.Skip()

    def OnLabelLeftDClick(self, evt):
        self.log.write("OnLabelLeftDClick: (%d,%d) %s\n" %
                       (evt.GetRow(), evt.GetCol(), evt.GetPosition()))
        evt.Skip()

    def OnLabelRightDClick(self, evt):
        self.log.write("OnLabelRightDClick: (%d,%d) %s\n" %
                       (evt.GetRow(), evt.GetCol(), evt.GetPosition()))
        evt.Skip()


    def OnRowSize(self, evt):
        self.log.write("OnRowSize: row %d, %s\n" %
                       (evt.GetRowOrCol(), evt.GetPosition()))
        evt.Skip()

    def OnColSize(self, evt):
        self.log.write("OnColSize: col %d, %s\n" %
                       (evt.GetRowOrCol(), evt.GetPosition()))
        evt.Skip()

    def OnRangeSelect(self, evt):
        if evt.Selecting():
            self.log.write("OnRangeSelect: top-left %s, bottom-right %s\n" %
                           (evt.GetTopLeftCoords(),
evt.GetBottomRightCoords()))
        evt.Skip()


    def OnCellChange(self, evt):
        self.log.write("OnCellChange: (%d,%d) %s\n" %
                       (evt.GetRow(), evt.GetCol(), evt.GetPosition()))

        # Show how to stay in a cell that has bad data.  We can't just
        # call SetGridCursor here since we are nested inside one so it
        # won't have any effect.  Instead, set coordinates to move to in
        # idle time.
        value = self.GetCellValue(evt.GetRow(), evt.GetCol())
        if value == 'no good':
            self.moveTo = evt.GetRow(), evt.GetCol()


    def OnIdle(self, evt):
        if self.moveTo != None:
            self.SetGridCursor(self.moveTo[0], self.moveTo[1])
            self.moveTo = None
        evt.Skip()


    def OnSelectCell(self, evt):
        self.log.write("OnSelectCell: (%d,%d) %s\n" %
                       (evt.GetRow(), evt.GetCol(), evt.GetPosition()))

        # Another way to stay in a cell that has a bad value...
        row = self.GetGridCursorRow()
        col = self.GetGridCursorCol()
        if self.IsCellEditControlEnabled():
            self.HideCellEditControl()
            self.DisableCellEditControl()
        value = self.GetCellValue(row, col)
        if value == 'no good 2':
            return  # cancels the cell selection
        evt.Skip()


    def OnEditorShown(self, evt):
        if evt.GetRow() == 6 and evt.GetCol() == 3 and \
           wxMessageBox("Are you sure you wish to edit this cell?",
                        "Checking", wxYES_NO) == wxNO:
            evt.Veto()
            return

        self.log.write("OnEditorShown: (%d,%d) %s\n" %
                       (evt.GetRow(), evt.GetCol(), evt.GetPosition()))
        evt.Skip()


    def OnEditorHidden(self, evt):
        if evt.GetRow() == 6 and evt.GetCol() == 3 and \
           wxMessageBox("Are you sure you wish to  finish editing this
cell?",
                        "Checking", wxYES_NO) == wxNO:
            evt.Veto()
            return

        self.log.write("OnEditorHidden: (%d,%d) %s\n" %
                       (evt.GetRow(), evt.GetCol(), evt.GetPosition()))
        evt.Skip()


    def OnEditorCreated(self, evt):
        self.log.write("OnEditorCreated: (%d, %d) %s\n" %
                       (evt.GetRow(), evt.GetCol(), evt.GetControl()))



#---------------------------------------------------------------------------

class TestFrame(wxFrame):
    def __init__(self, parent, log):
        wxFrame.__init__(self, parent, -1, "Simple Grid Demo",
size=(640,480))
        grid = SimpleGrid(self, log)



#---------------------------------------------------------------------------

if __name__ == '__main__':
    import sys
    app = wxPySimpleApp()
    frame = TestFrame(None, sys.stdout)
    frame.Show(True)
    app.MainLoop()

#---------------------------------------------------------------------------




From phil at freehackers.org  Tue Feb  1 18:28:28 2005
From: phil at freehackers.org (Philippe Fremy)
Date: Wed, 02 Feb 2005 00:28:28 +0100
Subject: Next step after pychecker
In-Reply-To: <mailman.1708.1107288807.22381.python-list@python.org>
References: <41ff0308$0$6503$636a15ce@news.free.fr>	<cto5b9$hpi$1@swifty.westend.com>
	<369mivF4ubv6mU1@individual.net>
	<mailman.1708.1107288807.22381.python-list@python.org>
Message-ID: <420010a0$0$27056$626a14ce@news.free.fr>


> I do not want to discourage Philippe Fremy but I think that this would be very 
> very difficult to do without modifying Python itself.

That's the conclusion I reached to too after lurking on the ocaml list.

> 
> What FP languages rely upon to achieve type inference is a feature named 
> "strong typing". 
 > [...]
>
> This is certainly not the case for Python since one and the same variable can 
> have different types depending upon the execution context. Example :
> 
> 1- if a is None:
> 2-   b = 1
> 3- else:
> 4-   b = "Phew"
> 5- b = b + 1
> 
> One cannot statically determine the type of b by examining the line 5- alone.
> 

There are even worse cases:

1- a=1
2- a= someObject.someMethod()

someObject might not have someMethod() and this would be caught by an 
AttributeError exception handler and 'a' will stay at 1.


> Therefore, Fremy's dream can very well turn to some very complex expert system 
> to make "educated" warning. Being "educated" is a lot harder than to be 
> "brutal".

And even being brutal is not that easy to achieve...

> Anyway, strong typing as defined above would change the Python language in 
> some of its fundamental design. It would certainly be valuable to attempt the 
> experience, and rename the new language (mangoose would be a pretty name).

Indeed. I understood that this is one of the things that could be 
provided by pypy.

What I understood (Jacek, this is an answer for you too) is that there 
are many usage patterns for python.

Some people use it for all of its advanced dynamic features. I use it in 
a java-like fashion. One could use it without the "OO crap", like a 
modern pascal replacement.

This is a strength of python that it lends itself to so many programming 
paradigm. However, one drawback is that python is not optimum in many of 
these paradigm (although it is sometimes the best proponent). In my 
case, dynamic typing is not a required feature. Typing immutability and 
type inferring is a lot more valuable.

I really hope that pypy will provide that kind of choice. Give me python 
with eiffel like contracts, super speed optimisation thank to type 
inference and I will be super happy.

Thank everyone for its feedback.

Any other idea of a fun python improvement project I could join without 
too much hassle ? I can't help but thinking that pychecker ought to be 
able to do a better job.

	regards,

	Philippe



> 
> Francis Girard
> FRANCE
> 
> Le mardi 1 F?vrier 2005 16:49, Diez B. Roggisch a ?crit :
> 
>>>But it can be useful to restrict type variety in certain situations
>>>e.g. prime number calculation :) And it would probably also be useful
>>>to check violations of restrictions before running the program in
>>>normal mode.
>>
>>But that's what (oca)ml and the like do - they exactly don't force you to
>>specify a type, but a variable has an also variable type, that gets
>>inferned upon the usage and is then fixed.
>>
>>--
>>Regards,
>>
>>Diez B. Roggisch
> 
> 


From python-list at outershell.co.uk  Wed Feb 23 15:15:47 2005
From: python-list at outershell.co.uk (Phil Jackson)
Date: Wed, 23 Feb 2005 20:15:47 +0000
Subject: Dealing with config files what's the options
In-Reply-To: <b54d0489050222173810d9ac75@mail.gmail.com> (Tom Willis's
	message of "Tue, 22 Feb 2005 20:38:28 -0500")
References: <b54d0489050222173810d9ac75@mail.gmail.com>
Message-ID: <87oeebvxqk.fsf@outershell.co.uk>

Tom Willis <tom.willis at gmail.com> writes:

> How are the expert pythoneers dealing with config files?

You could use the cPickle module if you don't mind your config files
being unreadable by humans. There is also the shlex module for more
powerful config file needs:

http://docs.python.org/lib/module-shlex.html

While I'm replying to you, would you mind if I take the opportunity to
ask you to stop top-posting?

Thanks,

Phil


From beliavsky at aol.com  Mon Feb  7 07:27:56 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 7 Feb 2005 04:27:56 -0800
Subject: declarations summary
References: <1107750862.485179.61980@c13g2000cwb.googlegroups.com>
	<1grm033.wnee8f9w790oN%aleaxit@yahoo.com>
Message-ID: <1107779276.262575.138240@f14g2000cwb.googlegroups.com>

Alex Martelli wrote:

> > socks off yet again, but I can't see counting on it. So the
successor
> > to Fortran (presuming it isn't C++, which I do presume) may be
> > influenced by Python, but probably it won't be Python.
>
> You appear to assume that Fortran is dead, or dying, or is gonna die
> soon.  I assume Mr. Beliavski will do a great job of jumping on you
for
> this, so I can save the effort of doing do myself;-).

Everyone needs a purpose in life :). I hope that Fortran 2003 and
future versions will be the successors of traditional Fortran, but I
may well be disappointed.

Many scientists and engineers do not have the motivation, the time, or
even the ability to master C++, generally acknowledged to be a language
for professional programmers. When performance is not paramount, they
can use Python (with Numarray or Numeric) and other array languages
like Matlab/Octave/Scilab as reasonable alternatives to Fortran.
Despite its high cost for non-students, Matlab is enormously popular
among engineers.



From dave at pythonapocrypha.com  Wed Feb 23 12:02:58 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Wed, 23 Feb 2005 10:02:58 -0700
Subject: kill a process in XP
In-Reply-To: <cvi3i9$161k$1@news.uit.no>
References: <cvi3i9$161k$1@news.uit.no>
Message-ID: <421CB742.2010302@pythonapocrypha.com>

Tor Erik S?nvisen wrote:
>>From my Python-program I spawn a new process. When using P_NOWAIT spawnl 
> returns the pid but in windows it returns a process handle.
> Later I want to kill this process. How can I do this when I only have the 
> process handle?

Try ctypes - if it's really a Windows handle, then this should work:

from ctypes import *
windll.kernel32.TerminateProcess(h, 0) # or whatever return code you want

-Dave


From JohannesNix|Johannes.Nix at uni-oldenburg.de  Fri Feb 18 09:19:05 2005
From: JohannesNix|Johannes.Nix at uni-oldenburg.de (JohannesNix|Johannes.Nix at uni-oldenburg.de)
Date: 18 Feb 2005 15:19:05 +0100
Subject: Solution for architecure dependence in Numeric ?
Message-ID: <67ll9mymqu.fsf@achernar.i-did-not-set--mail-host-address--so-shoot-me>


Hi,

I have a tricky problem with Numeric. Some time ago, I have generated
a huge and complex data structure, and stored it using the cPickle
module. Now I want to evaluate it quickly again on a workstation
cluster with 64-Bit Opteron CPUs - I have no more than three days to
do this. Compiling Python and running Numeric has been no problem at
all. However, I get an error message when accessing the data pickled
before. (I can load it regularly on 32 bit computers, but it is a
quite complex data object, so I really don't want to store every
element as ASCII data).  The problem seems to be with 64 Bit integers
(with 32-bit-floats, no problem was observed).

This looks like that (from the Unix command shell):


jnix at 32bithost:~> python ~/python/test_npickle.py  -dump test.pck
jnix at 32bithost:~> python ~/python/test_npickle.py  test.pck
[0 1 2 3 4 5 6 7 8 9]
jnix at 32bithost:~> ssh 64bithost python ~/python/test_npickle.py  test.pck
Traceback (most recent call last):
  File "/home/jnix/python/test_npickle.py", line 16, in ?
    a = cPickle.load(file(filename))
  File "/home/jnix/lib/python2.4/SuSE-9.0/x86_64/Numeric/Numeric.py", line 520, in array_constructor
    x.shape = shape
ValueError: ('total size of new array must be unchanged', <function array_constructor at 0x2a960b0b18>, ((10,), 'l', '\x00\x00\x00\x00\x01\x00\x00\x00\x02\x00\x00\x00\x03\x00\x00\x00\x04\x00\x00\x00\x05\x00\x00\x00\x06\x00\x00\x00\x07\x00\x00\x00\x08\x00\x00\x00\t\x00\x00\x00', 1))


also I get:
jnix at 32bithost:~> python -c "import Numeric; print Numeric.arange(0).itemsize()"
4
jnix at 64bithost:~>  python -c "import Numeric; print Numeric.arange(0).itemsize()"
8


The script used to produce the example above is:

-------------------------------------------------------------------------
#/usr/bin/python
# -*- coding: latin1 -*-

import Numeric
import cPickle
import sys

if len(sys.argv) > 1 and sys.argv[1] == '-dump':
    filename = sys.argv[2]
    binary=1
    a = Numeric.arange(10) 
    cPickle.dump(a, file(filename,'w',binary))

else:
    filename = sys.argv[1]
    a = cPickle.load(file(filename))
    print a
    

---------------------------------------------------------------------


So what would you suggest ? Can I hack Numeric to assume non-native
32 bit integer numbers ?

Many thanks for any help,

Johannes


From peter at engcorp.com  Mon Feb 21 12:21:16 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 21 Feb 2005 12:21:16 -0500
Subject: Unittest - testing properties (read-only attributes)
In-Reply-To: <roy-7E7A58.12112821022005@reader2.panix.com>
References: <uu0o5c0br.fsf@yahoo.co.uk>
	<roy-7E7A58.12112821022005@reader2.panix.com>
Message-ID: <uaKdncr3ppCbhIffRVn-rA@powergate.ca>

Roy Smith wrote:
> You want something like
> 
> self.assertRaises(AttributeError, lambda: self.combat.value = 1)

Or, combining the two responses and avoiding the lambda:

  self.assertRaises(AttributeError, setattr, self.combat, 'value', 1)

Hmm... this might be a case where the lambda form is actually the
more readable one...

-Peter


From mwm at mired.org  Thu Feb 10 07:47:54 2005
From: mwm at mired.org (Mike Meyer)
Date: Thu, 10 Feb 2005 06:47:54 -0600
Subject: negative integer division
References: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
	<42096EAD.879E8A5F@yahoo.com>
	<86wtti76cp.fsf@guru.mired.org> <420A916C.94F7F175@yahoo.com>
Message-ID: <86sm447f9h.fsf@guru.mired.org>

Jive Dadson <jdadson at yahoo.com> writes:

> Mike Meyer wrote:
>> [C] isn't - it's a portable assembler.
>
> I've heard that many times, but it makes no sense to me.  By definition,
> the syntax of an assembly language closely resembles the format of
> individual hardware instructions for a particular processor.

Um, no. The syntax of an assembly language is totally unrelated to the
format of the individual hardware instructions for a particular
processor. Typically, the syntax of an assembly language is such that
one obvious syntactical element (for instance, a line) generates one
hardware instruction. Usually, mnemonics of some kind were used to
denote which instruction to generate. However, it doesn't have to be
that way. Whitesmith had a z80/8080 assembler in which you wrote "a +=
b" to add the contents of register b to register a.

> An
> assembler assembles individual hardware instructions.  Back in the day,
> Unix (written largely in C) and Steve Johnson's pcc (the *portable* C
> compiler) together constituted a big leap forward.

A big leap forward *from assembler*. The development space that C
occupied at that time was the kernel and system utilities - things
that were usually (though by no means always) done in assembler before
the arrival of C. As a tool for producing robust, reliable code it
pretty much sucks, because it has so many of the flaws that assembler
has. Calling it a high level language is a disservice to the HLLs of
the era.

> Implementing Unix on
> new processors was infinitely easier than porting OS's written in
> assembly language.  So I disagree on two counts: C code is not entirely
> portable, (for example, division and mod may not work the same on two
> different machines), and a C compiler is most certainly not an
> assembler.

No language is entirely portable. C is *much* more portable than the
assembler languages that it displaced.

Note that C has displaced assembler in other areas - for instance,
it's not uncommon to find compilers that use "ANSI C" as the target
machine. By using C as a portable assembler instead of generating
machine code, the number of supported platforms increases
dramatically.

>> Now, I'll agree with you if you want to argue that some machines do
>> negative integer division in stupifyingly horrible ways.
>
> That's why I think it was a stupifyingly horrible decision.
> Understandable, but in the end an s.h.d. nonetheless.  It would have
> been okay to define / and % correctly, in the mathematical sense,
> but also provide functions quick_div() and quick_mod() that were
> guaranteed to work correctly only when both arguments were positive.
> The way they did it is just too error prone, akin to early
> optimization.

The way they did it was exactly right for the target applications
(i.e. - the v6 Unix kernel and system utilities).

> It's bitten me before, when I was called on to port
> code (which I did not write) from one machine to another.

There is no such thing as a portable program - merely ported
programs. I've been bitten by the code assuming that ints were two
bytes long, and know of cases where people were bitten by code that
assumed that chars were 8 bits. The simple fact of the matter is that
these things - like the behavior of the low-level div and mod
instructions - change from machine to machine. You have to deal with
such things when you are writing what is basically assembler. If you
were using a real HLL, none of these things would be a problem.

> Having standard operators with
> under-defined behavior is just inviting trouble: long debugging
> sessions, or worse, unexplained failures in the field.  Of course you
> and I would avoid all the pitfalls at the start. :-)

It's no worse than having standard types with loosely defined
sizes. That's part of the price for working that close to the machine.

       <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From danperl at rogers.com  Thu Feb 17 09:42:42 2005
From: danperl at rogers.com (Dan Perl)
Date: Thu, 17 Feb 2005 09:42:42 -0500
Subject: os.walk()
References: <cv29o3$ror$1@solaris.cc.vt.edu>
Message-ID: <c8SdnVROApn7MInfRVn-3A@rogers.com>


"rbt" <rbt at athop1.ath.vt.edu> wrote in message 
news:cv29o3$ror$1 at solaris.cc.vt.edu...
> Could someone demonstrate the correct/proper way to use os.walk() to skip 
> certain files and folders while walking a specified path? I've read the 
> module docs and googled to no avail and posted here about other os.walk 
> issues, but I think I need to back up to the basics or find another tool 
> as this isn't going anywhere fast... I've tried this:
>
> for root, dirs, files in os.walk(path, topdown=True):
>
>     file_skip_list = ['file1', 'file2']
>     dir_skip_list = ['dir1', 'dir2']
>
>     for f in files:
>         if f in file_skip_list
>             files.remove(f)
>
>     for d in dirs:
>         if d in dir_skip_list:
>             dirs.remove(d)

I think the problem here is that you are removing elements from a list while 
traversing it.  Try to use a copy for the traversal, like this:
     for f in files[:]:
         if f in file_skip_list
             files.remove(f)

     for d in dirs[:]:
         if d in dir_skip_list:
             dirs.remove(d)

> And This:
>
>     files = [f for f in files if f not in file_skip_list]
>     dirs = [d for d in dirs if dir not in dir_skip_list]

This is not doing what you want because it just creates new lists and it 
doesn't modify the existing lists that the os.walk generator is using. 




From ncoghlan at iinet.net.au  Mon Feb  7 08:17:45 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Mon, 07 Feb 2005 23:17:45 +1000
Subject: declarations summary
In-Reply-To: <1107750862.485179.61980@c13g2000cwb.googlegroups.com>
References: <1107750862.485179.61980@c13g2000cwb.googlegroups.com>
Message-ID: <42076A79.8090507@iinet.net.au>

Michael Tobis wrote:
> Also there's the question of typo-driven bugs, where an attempted
> rebinding of "epsilon" instead cerated a reference called "epselon".
> (The epselon bug) This is the bane of fortran, and after generations it
> was generally agreed that optionally one could require all references
> to be declared (implicit none). Perl went throgh a similar process and
> implemented a "use strict" module. Experienced Pythonistas are oddly
> resistant to even contemplating this change, though in the Fortran and
> Perl worlds their usage quickly became practically universal.
> 
> I believe that enthusiasm for this construct in other languages is so
> strong that it should be prominently addressed in Python introductions
> and surveys, and that questions in this regard should be expected from
> newbies and patiently addressed. I also don't fully understand the
> profound aversion to this idea.
> 
> I myself am going back and forth on all this. I despise the fact that
> good fortran90 code often has more declarations than executables. Ed
> Ream (LEO's author) pointed out to me the Edward-Tufte-ness of Python.
> No wasted ink (except maybe the colons, which I do sometimes find
> myself forgetting on long edits...)  I don't want Python to look like
> f90. What would be the point?

*If* the rebinding issue were to be addressed for bare names and the right-most 
name in a compound name (the only place where it is currently an issue), I 
imagine it would be by introducing a rebinding augmented assignment operator 
rather than by introducing variable declarations.

Or, more precisely, standard name binding would continue to serve in that role.

For Alex:

I figured out something resembling a justification for the difference in 
semantics between a rebinding operator and the rest of the augmented assignment 
operators: there's no magic method for binding a name, so there is no need for a 
magic method when simply rebinding one, whereas the other augmented assignment 
operators combine the name-binding with an operation which normally *can* be 
overridden, and the augmented assignment magic method is a convenience to allow 
the rebinding case of that operation to be optimised.

Cheers,
Nick.
Do I really want to add another PEP to the snoozing PEP 338, though?

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From cam.ac.uk at mh391.invalid  Fri Feb 11 18:48:30 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Fri, 11 Feb 2005 23:48:30 +0000
Subject: pre-check for string-to-number conversion
In-Reply-To: <1108163692.700703.183870@o13g2000cwo.googlegroups.com>
References: <1108163692.700703.183870@o13g2000cwo.googlegroups.com>
Message-ID: <cujg8h$115$1@gemini.csx.cam.ac.uk>

18k11tm001 at sneakemail.com wrote:
> I know that I can us exceptions, but they
> don't seem like the cleanest and simplest solution to me.

Stop worrying and learn to love exceptions. :)
-- 
Michael Hoffman


From carribeiro at gmail.com  Sat Feb  5 16:35:55 2005
From: carribeiro at gmail.com (Carlos Ribeiro)
Date: Sat, 5 Feb 2005 19:35:55 -0200
Subject: empty classes as c structs?
In-Reply-To: <42053394.6020203@po-box.mcgill.ca>
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
	<MIadnXkLYul4hZjfRVn-2Q@comcast.com>
	<42053394.6020203@po-box.mcgill.ca>
Message-ID: <864d37090502051335f71127c@mail.gmail.com>

On Sat, 05 Feb 2005 15:59:00 -0500, Brian van den Broek
<bvande at po-box.mcgill.ca> wrote:
> (I'm just a hobbyist, so if this suggestion clashes with some well
> established use of 'Bag' in CS terminology, well, never mind.)

There's already a well know know use for the 'bag' name, including a
recipe in Python. A bag is an arbitrary collection of objects. It's
similar to a set. The cookbook code is at:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/259174

-- 
Carlos Ribeiro
Consultoria em Projetos
blog: http://rascunhosrotos.blogspot.com
blog: http://pythonnotes.blogspot.com
mail: carribeiro at gmail.com
mail: carribeiro at yahoo.com


From duncan.booth at invalid.invalid  Fri Feb 18 09:50:04 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 18 Feb 2005 14:50:04 GMT
Subject: difference between class methods and instance methods
References: <pan.2005.02.17.07.04.37.907754@yahooz.com>
	<Xns96005FE3164DAduncanrcpcouk@127.0.0.1>
	<1119g2rre5g610c@corp.supernews.com>
	<37juh3F5d511mU1@individual.net>
	<Xns9600AE4FC946duncanrcpcouk@127.0.0.1>
	<37m8n9F5dkf4kU1@individual.net>
Message-ID: <Xns9601963496890duncanrcpcouk@127.0.0.1>

Diez B. Roggisch wrote:

>> This is badly wrong. John was correct.
>> 
>> Bound methods get created whenever you reference a method of an
>> instance. If you are calling the method then the bound method is
>> destroyed as soon as the call returns. You can have as many different
>> bound methods created from the same unbound method and the same
>> instance as you want: 
> 
> That did escape me so far - interesting. Why is it that way? I'd
> expect that creating a bound method from the class and then storing it
> in the objects dictionary is what happens. 
> 
If you had a class with 50,000 methods it could take quite a while to 
create instances, consider Zope as an example where every object acquires 
large numbers of methods most of which are completely irrelevant. Even 
outside Zope most objects never have all their methods called: dict, for 
example, has 38 methods but most of them get little or no use.

Creating a bound method is a comparatively cheap operation, its a small 
object which just has to hold references to the instance and the function.
The memory allocation is fast, because Python keeps lists of appropriately 
sized buckets for small objects.


From alan.gauld at btinternet.com  Sun Feb 27 04:19:40 2005
From: alan.gauld at btinternet.com (Alan Gauld)
Date: Sun, 27 Feb 2005 09:19:40 +0000 (UTC)
Subject: lambda strangeness??
References: <v73321hkh2v7bhrnj7enet296entdj5drb@4ax.com>
Message-ID: <544321d0cjhv9925dkopsumiqg7m52em0i@4ax.com>

On Sun, 27 Feb 2005 09:07:28 +0000 (UTC), Alan Gauld
<alan.gauld at btinternet.com> wrote:

> >>> adds = [lambda y: (y + n) for n in range(10)]
> >>> adds[0](0)
> 9
> >>> for n in range(5): print adds[n](42)
> ...
> 42
> 43

> the for loop... It seems to somehow be related to the 
> last value in the range(), am I somehow picking that up as y?

Further exploration suggests I'm picking it up as n not y, if
that indeed is what's happening...

Alan G.
Author of the Learn to Program website
http://www.freenetpages.co.uk/hp/alan.gauld


From pekka.niiranen at wlanmail.com  Thu Feb 10 11:58:50 2005
From: pekka.niiranen at wlanmail.com (pekka niiranen)
Date: Thu, 10 Feb 2005 16:58:50 GMT
Subject: Is this a bug? BOM decoded with UTF8
Message-ID: <epMOd.357$7m.215@read3.inet.fi>

Hi there,

I have two files "my.utf8" and "my.utf16" which
both contain BOM and two "a" characters.

Contents of "my.utf8" in HEX:
	EFBBBF6161

Contents of "my.utf16" in HEX:
	FEFF6161


For some reason Python2.4 decodes the BOM for UTF8
but not for UTF16. See below:

 >>> fh = codecs.open("my.uft8", "rb", "utf8")
 >>> fh.readlines()
[u'\ufeffaa']  	# BOM is decoded, why
 >>> fh.close()
 >>> fh = codecs.open("my.utf16", "rb", "utf16")
 >>> fh.readlines()
[u'\u6161']	# No BOM here
 >>> fh.close()

Is there a trick to read UTF8 encoded file with BOM not decoded?

-pekka-


From dbickett at gmail.com  Thu Feb  3 17:33:53 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Thu, 3 Feb 2005 17:33:53 -0500
Subject: Where are list methods documented?
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E801DAFE19@its-xchg4.massey.ac.nz>
References: <ECBA357DDED63B4995F5C1F5CBE5B1E801F9892A@its-xchg4.massey.ac.nz>
	<ECBA357DDED63B4995F5C1F5CBE5B1E801DAFE19@its-xchg4.massey.ac.nz>
Message-ID: <1d6cdae3050203143366404788@mail.gmail.com>

Simply as a general reply to the OP, I've found that some of the most
definitive documentation can be found using help() at the command
line:

Python 2.3.4 (#53, May 25 2004, 21:17:02) [MSC v.1200 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> help(list)
Help on class list in module __builtin__:
[big snip]

It goes into good detail about all of the methods, etcetera.

-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From jepler at unpythonic.net  Mon Feb 14 19:38:10 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 14 Feb 2005 18:38:10 -0600
Subject: How can I tell if my host supports Python?
In-Reply-To: <NcbQd.1350$3b7.1098@bignews3.bellsouth.net>
References: <NcbQd.1350$3b7.1098@bignews3.bellsouth.net>
Message-ID: <20050215003810.GD6339@unpythonic.net>

If you have a shell, it's as simple as typing "python" and seeing if the
interactive interpreter appears:
    $ python
    Python 2.3.3 (#1, May  7 2004, 10:31:40) 
    [GCC 3.3.3 20040412 (Red Hat Linux 3.3.3-7)] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> 
If you've done this, you can find out the path to this Python
interpreter:
    >>> import sys; print sys.executable
    /usr/bin/python

Otherwise, the documentation for the 'cgi' module has a buried
suggestion with the simplest Python CGI program.
    http://docs.python.org/lib/node462.html
that program would look something like
    #!/usr/bin/python
    import cgi; cgi.test()
though you must know the correct path to the Python interpreter for this
to work.

Your best bet may be to ask your webhost for help---only they know how
they've (mis)configured your system.

Jeff
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From steve at holdenweb.com  Thu Feb  3 08:06:19 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 03 Feb 2005 08:06:19 -0500
Subject: global variables
In-Reply-To: <1107392092.290042.221600@c13g2000cwb.googlegroups.com>
References: <1107385488.822768.317250@l41g2000cwc.googlegroups.com>
	<1107388493.465599.140480@g14g2000cwa.googlegroups.com>
	<3YSdnYVEmOCW8pzfRVn-sg@comcast.com>
	<1107391350.933650.321440@z14g2000cwz.googlegroups.com>
	<1107392092.290042.221600@c13g2000cwb.googlegroups.com>
Message-ID: <pqpMd.102688$Jk5.95091@lakeread01>

M.E.Farmer wrote:

> Ok it has been a long day,
> In my reply to Steven Bethard , Steve should read Steven ;)
> 
> M.E.Farmer
> 
Well, since he signs himself "Steve" too I guess we'll just have to put 
up with the ambiguities. Or perhaps, given my (lack of) typing skill, I 
should just start signing myself "Stvev"?

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From jeff at ccvcorp.com  Wed Feb 16 12:48:11 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Wed, 16 Feb 2005 09:48:11 -0800
Subject: super not working in __del__  ?
In-Reply-To: <mailman.2697.1108571847.22381.python-list@python.org>
References: <cuu0pu$t44$1@sea.gmane.org> <cuuqrr$f1o$1@sea.gmane.org>
	<mailman.2697.1108571847.22381.python-list@python.org>
Message-ID: <11171oljbbb5cd3@corp.supernews.com>

Christopher J. Bottaro wrote:

> 2 Questions...
> 1)  Why does this never happen in C++?  Or does it, its just never happened
> to me?
> 2)  I can understand random destruction of instantiated objects, but I find
> it weird that class definitions (sorry, bad terminology) are destroyed at
> the same time.  So __del__ can't safely instantiate any classes if its
> being called as a result of interpreter shutdown?  Boo...

Keep in mind that in Python, everything is a (dynamically created) 
object, including class objects.  My recall of C/C++ memory 
organization is pretty weak, but IIRC it gives completely different 
behavior to code, stack objects, and heap objects.  Code never needs 
to be cleaned up.  In Python, everything (including functions and 
classes) is effectively a heap object, and thus functions and classes 
can (and indeed must) be cleaned up.  Refcounting means that they 
won't ever (normally) be cleaned up while they're still in use, but 
during program shutdown refcounting necessarily ceases to apply.

The closest that would happen in C++, I believe, would manifest itself 
as memory leaks and/or access of already-freed memory.

Jeff Shannon
Technician/Programmer
Credit International



From irmen.NOSPAM at xs4all.nl  Mon Feb 14 19:00:09 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Tue, 15 Feb 2005 01:00:09 +0100
Subject: is there a safe marshaler?
In-Reply-To: <7x3bvyiuin.fsf@ruckus.brouhaha.com>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<1108051828.483222.62670@z14g2000cwz.googlegroups.com>
	<7xmzu6q4cv.fsf@ruckus.brouhaha.com>
	<4211185b$0$28982$e4fe514c@news.xs4all.nl>
	<7xbramzt1c.fsf@ruckus.brouhaha.com>
	<42112b1e$0$28978$e4fe514c@news.xs4all.nl>
	<7xacq6sqej.fsf@ruckus.brouhaha.com>
	<421130ae$0$28984$e4fe514c@news.xs4all.nl>
	<7x3bvyiuin.fsf@ruckus.brouhaha.com>
Message-ID: <42113b3b$0$28991$e4fe514c@news.xs4all.nl>

Paul Rubin wrote:

> Yes, that's what I meant, using hmac to authenticate using a shared secret,
> sending the rest in the clear.  Note you should also put sequence numbers
> in the messages, to stop the attacker from fooling you by selectively
> deleting or replaying messages.

Thanks for the tip. I'll think about this.


>>You should not want to expose a Pyro service to the internet because
>>Python doesn't have Java's security model and sandboxing, that are
>>used with RMI. Pyro has a few features that are very powerful
>>but also require the use of intrinsic insecure Python code (namely,
>>pickle, and marshal).
> 
> 
> Can you say some more about this?  Does RMI really rely on sandboxes,
> if you don't send code around, but just expose operations on server
> side objects?

Well, my experience with RMI is very limited (and from a few years ago)
but I remember that you are required to set a security manager on your
RMI objects. I always used Java's default rmi security manager but I
honestly don't know what it actually does :-D

Other than that, it would be interesting to know if the RMP or IIOP
protocols have any problems with malicious packets? I don't know
them well enough to say anything about this.

> I don't think marshal is inherently insecure, since the unmarshaller
> doesn't itself execute any marshalled code.  It apparently has some
> bugs that can confuse it if you send it a malformed marshalled string,
> but those can be fixed.  Pickle is inherently insecure because of how
> it calls class constructors.

Yep, that's what I now know too from the other replies in this thread.


>>Just look at the recent security advisory about the XMLRPC server
>>that comes with Python.... it's much more primitive than Pyro is,
>>but even that one was insecure.
> 
> 
> I haven't looked at that bug carefully yet but yes, anything exposed
> to the internet has to be done very carefully, and XMLRPC missed something.

What I know of it is that you had the possibility to arbitrarily follow
attribute paths, including attributes that should rather be kept hidden.


>>I wouldn't put a Java RMI server or xyz CORBA server or whatever
>>kind of unrestricted API open on the internet anyway.
>>Am I rational or paranoid?
> 
> 
> I haven't used Java enough to advise you on this, but I thought they
> were supposed to be ok to expose to the internet.  Certainly the whole
> idea of .NET is to let you securely provide RPC services (excuse me
> for a moment while I try to stop laughing for mentioning security and
> Microsoft in the same sentence).  And lots of people use things like
> SOAP for that.

I label things like SOAP and XML-RPC much different than RMI or Pyro,
because they (SOAP) are much more "distant" from the actual
programming language and environment beneath them. I don't know if
this is good thinking or not but the fact that RMI and Pyro expose
language features directly, and SOAP not, makes that I reason about them
differently.

Then again, Pyro allows you to use two forms of XML serialization
on the wire (instead of pickle), which may or may not move it much closer
to SOAP and the likes. But there are other reasons for not wanting
a Pyro server exposed on the internet. Such as the lack of a good
security analisys of Pyro. Perhaps it suffers from similar holes
as XMLRPC until recently...

Furthermore there are practical issues such as having to
open a buch of new ports in your firewall. In my experience
this is very hard to get done, sadly, in contrast to just
exposing a "web-service" (in whatever form) on port 80 HTTP.


--Irmen


From noreply at python.org  Wed Feb  2 22:03:02 2005
From: noreply at python.org (Post Office)
Date: Thu, 3 Feb 2005 08:03:02 +0500
Subject: Delivery failed
Message-ID: <20050203031528.CEA481E4003@bag.python.org>

The original message was received at Thu, 3 Feb 2005 08:03:02 +0500
from [182.255.28.192]

----- The following addresses had permanent fatal errors -----
python-list at python.org

----- Transcript of session follows -----
... while talking to 72.27.31.20:
550 5.1.2 <python-list at python.org>... Host unknown (Name server: host not found)


From dscottr at bellatlantic.net  Wed Feb  9 16:18:19 2005
From: dscottr at bellatlantic.net (Scott Robinson)
Date: Wed, 09 Feb 2005 21:18:19 GMT
Subject: Big development in the GUI realm
References: <mailman.2135.1107829480.22381.python-list@python.org>
	<e0ag011atnlt5b00klicjol93c7j8fe341@4ax.com>
	<ndhg011h971bdl5o1i4k76j6n3tp15m38b@4ax.com>
Message-ID: <gtgl01pkgcrv9huon2i98coa918r3pjubb@4ax.com>

On Mon, 07 Feb 2005 20:56:44 -0800, Courageous <dontwant at spam.com>
wrote:

>
>>OK, so according to Linus, the GPL allows ....
>
>No. Pay attention. Linus has his own revised version, to clarify
>this point, and in fact /overruling/ the GPL if the point is
>clarified differently by RMS or others.
>
>That's the right of their community, it's /their/ code.
>
>>make calls to the kernel, but TrollTech says the GPL doesn't allow a
>>proprietary program to make calls to the Qt library.
>
>That's their prerogative, although TrollTech's authority as an
>/interpretational/ entity over the GPL means precisely zero. I
>wouldn't push this, though, unless you've got a big litigation
>budget.
It should also be pointed out that the FSF's interpretation of the GPL
with respect to Qt means absolutely zero.  If TrollTech publishes an
interpretation of the GPL and announces it to any interested in
licensing their software, I suspect that the courts will take that
into consideration.  This won't help that at all if it isn't a legally
valid interpretation, but it establishes that you *knew* what their
interpretation was when you agreed to the terms to distribute their
copyrighted software.

>
>>It's this double-standard that I find confusing, since both projects
>>are said to be based on the same license.
>
>Linus doesn't use "the" GPL, he uses "his" GPL, version-whatever.
>
>Anyway, your safe bet:
>
>Follow the copyright holder's wishes.
>
>That's fair. After all, it's free, so they're doing you a damn
>big favor.
>
>C//
Scott Robinson



From skip at pobox.com  Thu Feb 10 21:30:34 2005
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 10 Feb 2005 20:30:34 -0600
Subject: Install MySQLdb on Mac OS X (10.3)
In-Reply-To: <420bf2f4$0$16553$9b622d9e@news.freenet.de>
References: <420bf2f4$0$16553$9b622d9e@news.freenet.de>
Message-ID: <16908.6346.779997.277792@montanaro.dyndns.org>

    TK> I can't install MySQLdb on Mac OS X (Ver. 10.3) properly. Here's my 
    TK> environment:

    TK> 1. MySQL-python-1.0.0

    ...

Try a more recent version of mysql-python.  I think 1.1.7 is the latest.

Skip


From michele.simionato at gmail.com  Sun Feb 20 04:37:40 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 20 Feb 2005 01:37:40 -0800
Subject: recommended way of generating HTML from Python
In-Reply-To: <cv9kpi$qa5$1@atlantis.news.tpi.pl>
References: <1108889625.068929.88890@z14g2000cwz.googlegroups.com>
	<cv9kpi$qa5$1@atlantis.news.tpi.pl>
Message-ID: <1108892260.013164.9000@l41g2000cwc.googlegroups.com>

Just to clarify, before people start pointing out their preferred
templating language: I am NOT asking for
a template system. I am asking for something on the
lines of HTMLGen, where you just use pure Python.



From jan.dries at dcube-resource.be  Sun Feb 20 11:42:37 2005
From: jan.dries at dcube-resource.be (Jan Dries)
Date: Sun, 20 Feb 2005 17:42:37 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cvadcj$mqc$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>	<42172136$0$27576$9b622d9e@news.freenet.de>	<cv7i57$d0v$1@usenet.otenet.gr>	<42185b05$0$15460$9b622d9e@news.freenet.de>	<cv9sdo$69n$3@usenet.otenet.gr>	<42189527$0$6260$9b622d9e@news.freenet.de>
	<cvadcj$mqc$1@usenet.otenet.gr>
Message-ID: <4218BDFD.7070205@dcube-resource.be>

Ilias Lazaridis wrote:
> 
> they above 2 questions are coherent, thus answering isolated [as you've 
> done] makes not much sense.
> 
> "
>  >> Should I take answers serious?
>  >> Answer from people which do not respect coherence of writings?
> "

Except that the quote here above is NOT what was in your original 
posting. Here is the *real* quote (also note that Python uses """ 
instead of " for delimiting a multi-line string:

"""
Should I take answers serious?

Answer from people which do not respect coherence of writings?
"""

If you insert a blank line between two sentences most people in this 
newsgroup (and in the western world in general) will interprete that as 
the start of a new paragraph, as an indication that what follows is 
something different than what precedes the blank line.
If you want to obtain "coherence of writing" between two sentences, then 
maybe you shouldn't type them as different paragraphs.

If you would have written:

"""
Should I take answers serious? Answer from people which do not respect 
coherence of writings?
"""

it would have been much more coherent.

Regards,
Jan



From steven.bethard at gmail.com  Sun Feb 20 15:04:00 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 20 Feb 2005 13:04:00 -0700
Subject: help please
In-Reply-To: <1108921146.274248.11500@g14g2000cwa.googlegroups.com>
References: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
	<TPKdnU2eEu9xPJPfRVn-vg@comcast.com>
	<1108260752.791847.180060@l41g2000cwc.googlegroups.com>
	<Z4ydnbKMDLVvEJLfRVn-hA@comcast.com>
	<1108324679.451793.147890@z14g2000cwz.googlegroups.com>
	<i_ydnb41nJ68IZLfRVn-gw@comcast.com>
	<1108329540.239064.144920@f14g2000cwb.googlegroups.com>
	<j7udnc1ZGqsAUZLfRVn-3w@comcast.com>
	<1108334012.336816.221460@g14g2000cwa.googlegroups.com>
	<joSdnbH-qqzBZpLfRVn-tg@comcast.com>
	<1108921146.274248.11500@g14g2000cwa.googlegroups.com>
Message-ID: <hbydnV4bvrCxcIXfRVn-1w@comcast.com>

gargonx wrote:
> I think there's a problem with the code:
> 
>  py> decode_replacements.update([(std[key], key) for key in std])
>  py> decode_replacements.update([(ext[key], key) for key in ext])
> 
> when i run this i get an error:
>  AttributeError: keys
> 
> I can't get that figured out

Can you show the part of your code in which you do this?  As you can see 
from the interactive Python session I posted, I didn't get an 
AttributeError...

STeVe


From miki.tebeka at zoran.com  Mon Feb 14 02:19:56 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Mon, 14 Feb 2005 09:19:56 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cuo71l$gig$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
Message-ID: <20050214071934.GK1580@zoran.com>

Hello Ilias,

> d) Is it really neccessary that I dive into such adventures, to be able 
> to do the most natural thing like: "developing python extensions with 
> MinGW"?
Writing a setup.py and running 
    python setup.py build_ext --compiler=mingw32
works for me *without* any more work. Things can't get much simpler.

Bye.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys


From gazzar at nospam_email.com  Sat Feb 26 07:31:20 2005
From: gazzar at nospam_email.com (Gary Ruben)
Date: Sat, 26 Feb 2005 12:31:20 GMT
Subject: class factory example needed (long)
Message-ID: <s_ZTd.176596$K7.77632@news-server.bigpond.net.au>

I have a class factory problem. You could say that my main problem is
that I don't understand class factories.
My specific problem:
I have a class with several methods I've defined.
To this class I want to add a number of other class methods where the
method names are taken from a list.
For each list member, I want to build a method having the list member
name so that I can override another method of the same name for objects
which are instances of this class. Finally, I want my class factory
which creates the method to call the overridden method.

I'm sure my description is confusing, so I'll try to illustrate it.


import Numeric
# The Numeric module contains a whole lot of methods which operate on
certain number types

class foo:
""" this is a number type class
"""
     def __init__(self, value):
         self.value = float(value)
     def __str__(self):
         .
         . other methods here
         .

     import string
     ufuncs = string.split("""
         sqrt arccos arccosh arcsin arcsinh arctan arctanh cos cosh tan tanh
         log10 sin sinh sqrt absolute fabs floor ceil fmod exp log conjugate
         """)    # these are the methods from Numeric that I want to
override/wrap for my number type

     for u in ufuncs:
         I need something here which builds methods called sqrt(),
arccos(), etc.

     An illustrative example of the class methods I want to build with
some sort of class factory is
     def sqrt(self):
         val = Numeric.sqrt(self.value)
         return foo(Numeric.sqrt(self.value) + 42)

     def arccos(self):
         val = Numeric.arccos(self.value)
         return foo(Numeric.arccos(self.value) + 42)


if __name__ == "__main__":
     a = 9
     b = foo(7)
     print Numeric.sqrt(a)
     print Numeric.sqrt(b)


This would print
3
7

Note that the methods I want to create under program control are all
identical in form. In this example they all call the wrapped method with
an argument 42 greater than the value of the number.
Does anyone have an example where they've done something similar or
could help me out with an example?
thanks in anticipation,
Gary


From lbates at syscononline.com  Thu Feb  3 16:14:30 2005
From: lbates at syscononline.com (Larry Bates)
Date: Thu, 03 Feb 2005 15:14:30 -0600
Subject: remove duplicates from list *preserving order*
In-Reply-To: <BfmdnTjWquaJEZ_fRVn-3A@comcast.com>
References: <BfmdnTjWquaJEZ_fRVn-3A@comcast.com>
Message-ID: <_d-dnbaNjc6uCZ_fRVn-oQ@comcast.com>

Take a look at this recipe on ASPN:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/204297

I think it might help.

Larry Bates


Steven Bethard wrote:
> I'm sorry, I assume this has been discussed somewhere already, but I 
> found only a few hits in Google Groups...  If you know where there's a 
> good summary, please feel free to direct me there.
> 
> 
> I have a list[1] of objects from which I need to remove duplicates.  I 
> have to maintain the list order though, so solutions like set(lst), etc. 
> will not work for me.  What are my options?  So far, I can see:
> 
> def filterdups(iterable):
>     result = []
>     for item in iterable:
>         if item not in result:
>             result.append(item)
>     return result
> 
> def filterdups(iterable):
>     result = []
>     seen = set()
>     for item in iterable:
>         if item not in seen:
>             result.append(item)
>             seen.add(item)
>     return result
> 
> def filterdups(iterable):
>     seen = set()
>     for item in iterable:
>         if item not in seen:
>             seen.add(item)
>             yield item
> 
> Does anyone have a better[2] solution?
> 
> STeve
> 
> [1] Well, actually it's an iterable of objects, but I can convert it to 
> a list if that's helpful.
> 
> [2] Yes I know, "better" is ambiguous.  If it helps any, for my 
> particular situation, speed is probably more important than memory, so 
> I'm leaning towards the second or third implementation.


From thomastnewman at yahoo.com  Sat Feb 19 08:36:36 2005
From: thomastnewman at yahoo.com (Thomas Newman)
Date: Sat, 19 Feb 2005 14:36:36 +0100
Subject: error in non-existing code?
In-Reply-To: <cv364j$omq$1@gemini.csx.cam.ac.uk>
References: <mailman.2782.1108677969.22381.python-list@python.org>
	<cv364j$omq$1@gemini.csx.cam.ac.uk>
Message-ID: <421740E4.5030005@yahoo.com>

Michael Hoffman wrote:

> Thomas Newman wrote:
>
>> I wanted to look at the code that gives me the error, but there is no
>> line 447 in /usr/lib/python2.3/pyclbr.py:
>
>
> Try deleting pyclbr.py[co].

No change there.

ttn


From peter at engcorp.com  Thu Feb 10 14:41:36 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 10 Feb 2005 14:41:36 -0500
Subject: [N00B] What's %?
In-Reply-To: <420b9dc1$0$29504$a1866201@visi.com>
References: <614c778e.0502100938.6665cb52@posting.google.com>
	<420b9dc1$0$29504$a1866201@visi.com>
Message-ID: <rs6dnX6Htfz3JJbfRVn-vg@powergate.ca>

Grant Edwards wrote:
> It's the modulus operator.  It returns the remainder of integer
> division.  As we used to say in second grade:
> 
>  4 goes into 107 26 times with 3 left over.
> 
>  3 goes into 4 2 times with 1 left over. 

How long were you stuck in second grade, Grant?  <grin>

-Peter

P.S.  You're correct, for large values of four.... ;-)


From ilias at lazaridis.com  Tue Feb 15 16:16:45 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 23:16:45 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2645.1108496397.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<curb3t$67k$3@usenet.otenet.gr>	<mailman.2599.1108429568.22381.python-list@python.org>	<cut31n$bur$1@usenet.otenet.gr>
	<mailman.2645.1108496397.22381.python-list@python.org>
Message-ID: <cutorr$hfn$2@usenet.otenet.gr>

Tim Peters wrote:
[...] - (thorough comments)

Thank you very much for your thoroug comments.

.

-- 
http://lazaridis.com


From cmkleffner at gmx.de  Fri Feb 11 09:34:07 2005
From: cmkleffner at gmx.de (cmkl)
Date: 11 Feb 2005 06:34:07 -0800
Subject: is there a safe marshaler?
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<420b6e98$0$23018$626a14ce@news.free.fr>
	<420b9135$0$28982$e4fe514c@news.xs4all.nl>
Message-ID: <3b091a1c.0502110634.5edb1987@posting.google.com>

Irmen de Jong <irmen.NOSPAM at xs4all.nl> wrote in message news:<420b9135$0$28982$e4fe514c at news.xs4all.nl>...
> Pierre Barbier de Reuille wrote:
> > Irmen de Jong a ?crit :
> > 
> >> Pickle and marshal are not safe. They can do harmful
> >> things if fed maliciously constructed data.
> >> That is a pity, because marshal is fast.
> >> I need a fast and safe (secure) marshaler.
> >> Is xdrlib the only option?
> >> I would expect that it is fast and safe because
> >> it (the xdr spec) has been around for so long.
> >>
> >> Or are there better options (perhaps 3rd party libraries)?
> >>
> >> Thanks
> >>
> >> Irmen.
> > 
> > 
> > What exactly do you mean by "safe" ? Do you want to ensure your objects 
> > cannot receive corrupted data ? Do you want to ensure no code will be 
> > evaluated during the unmarshalling ?
> 
> "safe (secure)"
> But to be more precise, let's look at the security warning that
> is in the marshal documentation:
> "The marshal module is not intended to be secure against erroneous or 
> maliciously constructed data. Never unmarshal data received from an 
> untrusted or unauthenticated source."
> 
> So essentially I want the opposite of that ;-)
> 
> I want a marshalar that is okay to use where the data it processes
> comes from unknown, external sources (untrusted). It should not crash
> on corrupt data and it should not execute arbitrary code when
> unmarshaling, so that it is safe against hacking attempts.
> 
> Oh, preferrably, it should be fast :)
> Some XML-ish thing may be secure but is likely to be not fast at all.
> 
> Ideally it should be able to transfer user defined Python types,
> but if it is like marshal (can only marshal builtin types) that's
> okay too.
> 
> --Irmen

I'm just curious,

but can't effbot's fast cElementree be used for PYROs XML_PICKLE 
and would it be safe and fast enough?

Carl


From jack at performancedrivers.com  Mon Feb 28 14:05:04 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Mon, 28 Feb 2005 14:05:04 -0500
Subject: naming convention for scalars, lists, dictionaries ...
In-Reply-To: <3YydnR3xNd4k_r7fRVn-3g@comcast.com>
References: <1109613115.760962.292360@z14g2000cwz.googlegroups.com>
	<3YydnR3xNd4k_r7fRVn-3g@comcast.com>
Message-ID: <20050228190504.GV9263@performancedrivers.com>

On Mon, Feb 28, 2005 at 11:32:22AM -0700, Steven Bethard wrote:
> beliavsky at aol.com wrote:
> >Since Python does not have declarations, I wonder if people think it is
> >good to name function arguments according to the type of data structure
> >expected, with names like "xlist" or "xdict".
> 
> In general, I find that naming collections for their contents is much 
> more useful than some abbreviated type prefix.  However, while I don't 
> name objects by their type, I do tend to name iterables with plurals 
> (e.g. "words", "feature_indices", "events", etc.) and I typically suffix 
> mapping types with "map" (e.g. "word_index_map", "event_relation_map", 
> "prime_factor_map", etc.)
> 
Ditto for me, plural implies list and singular implies instance, 
for (contact) in contacts:
   # do something with contact

But I tend to name dictionaries as "key_to_value" as in 
"email_to_contact" or "ip_to_hostname."  

for (email) in emails:
  contact = email_to_contact[email]
  # do something with contact

It may seem verbose but I can type much faster than I can think and 
it makes reading even forgotten code a breeze.

-Jack


From mwm at mired.org  Tue Feb 15 12:48:27 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 15 Feb 2005 11:48:27 -0600
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr> <37bkemF5a7s7vU1@individual.net>
	<cut6nh$rpk$1@usenet.otenet.gr>
Message-ID: <86ll9piuj8.fsf@guru.mired.org>

Ilias Lazaridis <ilias at lazaridis.com> writes:

> MinGW compatibility is not my need.

Then why do you waste so much effort whining about it not being given
to you?

> It is an community need.

Based on the evidence at hand, this is a false statement.

      <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From williams13 at llnl.gov  Tue Feb  1 05:31:03 2005
From: williams13 at llnl.gov (Dean N. Williams)
Date: Tue, 01 Feb 2005 02:31:03 -0800
Subject: Building Python with Tcl/Tk on Cygwin_NT-5.1
Message-ID: <41FF5A67.3090606@llnl.gov>

Dear Python Community,

   I am trying to build Python with Tcl/Tk under the Cygwin_NT-5.1 OS. 
Has anyone done this? Do I need to build tcl8.4.9 and tk8.4.9 under the 
unix directory or the win directory. I found that the Tcl/Tk unix 
directories compiled just fine and built the libtcl8.4.a and libtk8.4.a 
libraries for use. But I don't think that Python is looking for this. If 
you've built Python with Tcl/Tck, is it possible for you to send me 
instructions on how you did it? Thanks in advance...

Best regards,
   Dean



From newsgroups at jhrothjr.com  Fri Feb 25 13:14:44 2005
From: newsgroups at jhrothjr.com (John Roth)
Date: Fri, 25 Feb 2005 12:14:44 -0600
Subject: Unit testing - one test class/method, or test class/class
References: <87y8ddywr9.fsf@titan.staselog.com>
Message-ID: <111uqqgag7eb253@news.supernews.com>

I tend to write one test class per class, but that's
just the way I got started. My feeling is that the
methods in a test class should tell a story if you
read the names in the order they were written,
so I'd split the tests for a class into several
classes if they had different stories to tell.

John Roth


"Edvard Majakari" <edvard+news at majakari.net> wrote in message 
news:87y8ddywr9.fsf at titan.staselog.com...
>
> Hi,
>
> I just found py.test[1] and converted a large unit test module to py.test
> format (which is actually almost-no-format-at-all, but I won't get there
> now). Having 348 test cases in the module and huge test classes, I started
> to think about splitting classes. Basically you have at least three 
> obvious
> choises, if you are going for consistency in your test modules:
>
> Choise a:
>
> Create a single test class for the whole module to be tested, whether it
> contains multiple classes or not.
>
> ...I dont think this method deserves closer inspection. It's probably 
> rather
> poor method to begin with. With py.test where no subclassing is required
> (like in Python unittest, where you have to subclass unittest.TestCase)
> you'd probably be better off with just writing a test method for each 
> class
> and each class method in the module.
>
> Choise b:
>
> Create a test class for each class in the module, plus one class for any
> non-class methods defined in the module.
>
> + Feels clean, because each test class is mapped to one class in the 
> module
> + It is rather easy to find all tests for given class
> + Relatively easy to create class skeleton automatically from test module
>  and the other way round
>
> - Test classes get huge easily
> - Missing test methods are not very easy to find[2]
> - A test method may depend on other tests in the same class
>
> Choise c:
>
> Create a test class for each non-class method and class method in the 
> tested
> module.
>
> + Test classes are small, easy to find all tests for given method
> + Helps in test isolation - having separate test class for single method
>  makes tested class less dependent of any other methods/classes
> + Relatively easy to create test module from existing class (but then you
>  are not doing TDD!) but not vice versa
>
> - Large number of classes results in more overhead; more typing, probably
>  requires subclassing because of common test class setup methods etc.
>
> What do you think, any important points I'm missing?
>
> Footnotes:
> [1]  In reality, this is a secret plot to advertise py.test, see
>     http://codespeak.net/py/current/doc/test.html
>
> [2] However, this problem disappears if you start with writing your tests
>    first: with TDD, you don't have untested methods, because you start by
>    writing the tests first, and end up with a module that passes the tests
>
>
> --
> # Edvard Majakari Software Engineer
> # PGP PUBLIC KEY available    Soli Deo Gloria!
> One day, when he was naughty, Mr Bunnsy looked over the hedge into Farmer
> Fred's field and it was full of fresh green lettuces. Mr Bunnsy, however, 
> was
> not full of lettuces. This did not seem fair.  --Mr Bunnsy has an 
> adventure 



From michele.simionato at gmail.com  Wed Feb 16 23:32:42 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 16 Feb 2005 20:32:42 -0800
Subject: low-end persistence strategies?
In-Reply-To: <7xd5v02l21.fsf@ruckus.brouhaha.com>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<1108570047.677348.146850@f14g2000cwb.googlegroups.com>
	<7x7jl8bhii.fsf@ruckus.brouhaha.com>
	<1108572988.341139.126020@z14g2000cwz.googlegroups.com>
	<7xd5v02l21.fsf@ruckus.brouhaha.com>
Message-ID: <1108614762.026703.323850@l41g2000cwc.googlegroups.com>

Paul Rubin:
> Oh yow, it looks pretty complicated.  Do you have any example code
> around that uses the transaction stuff?  If not I can try to figure
it
> out, but it looks like it would take significant effort.

This was my impression too :-( The ZODB is way much easier to use so
at the end I used just that. Apparently the bsddb stuff is more
complicated than needed and the documentation sucks. However,
it does satisfy your requirements of being already installed, so I
mentioned it. I am looking too for an easy tutorial on how to do
concurrency/transactions with it.

                 Michele Simionato



From nav+posts at bandersnatch.org  Tue Feb  1 14:23:28 2005
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: Tue, 01 Feb 2005 14:23:28 -0500
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<ctm7fr$p79$1@panix1.panix.com>
Message-ID: <87u0owaxu7.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>

aahz at pythoncraft.com (Aahz) writes:

> It's kind of like having a guy who juggles chainsaws wearing body armor 
> arguing with a guy who juggles rubber chickens wearing a T-shirt about who's 
> in more danger."  --Roy Smith, c.l.py, 2004.05.23

If it's Nethack, the guy in the T-shirt is in more danger. A _lot_
more danger.

Nick

-- 
#  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this to a python
print reduce(lambda x,y:x+chr(ord(y)-1),' Ojdl!Wbshjti!=obwAcboefstobudi/psh?')


From gmane-schpam at joefrancia.com  Tue Feb 15 14:33:52 2005
From: gmane-schpam at joefrancia.com (Joe Francia)
Date: Tue, 15 Feb 2005 14:33:52 -0500
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cutf1h$576$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<cupstp$an7$2@ctb-nnrp2.saix.net>	<cupupa$kfs$2@usenet.otenet.gr>
	<cupvhi$c15$1@news1.ucsd.edu>	<cuq084$r99$1@usenet.otenet.gr>
	<cuq2h0$j2s$1@eeyore.INS.cwru.edu>	<cuq57b$j83$1@usenet.otenet.gr>
	<37bkemF5a7s7vU1@individual.net>	<cut6nh$rpk$1@usenet.otenet.gr>
	<86ll9piuj8.fsf@guru.mired.org> <cutf1h$576$1@usenet.otenet.gr>
Message-ID: <cutim8$i2s$1@sea.gmane.org>

Ilias Lazaridis wrote:
> Mike Meyer wrote:
> 
>> Ilias Lazaridis <ilias at lazaridis.com> writes:
>>
>>> MinGW compatibility is not my need.
>>
>>
>> Then why do you waste so much effort whining about it not being given
>> to you?
>>
>>> It is an community need.
>>
>>
>> Based on the evidence at hand, this is a false statement.
>>
>>       <mike
> 
> 
> MinGW compatibility is not [only] my need.
> 
> It is an community need [at least partially]
> 

You keep using that word "community". I do not think it means what you 
think it means.

-- 
Soraia: http://www.soraia.com



From oliver.magno at digitaleyecandy.biz  Fri Feb 25 23:46:20 2005
From: oliver.magno at digitaleyecandy.biz (oliverm)
Date: Sat, 26 Feb 2005 12:46:20 +0800
Subject: Mask Array
Message-ID: <421FFF1C.1010106@digitaleyecandy.biz>

hi all,

i have read a tutorial about "gemath" and it has a dependency called MA 
(Mask Array), the problem is i cannot find any link where to download 
this thing, anyone knows where i could get Mask Array?

thanks.
-- 


_____________________________________________________________________

"/No man rises so high as he knows not/

/whither he goes."/


-Oliver Cromwell-


http://aps3angel.50megs.com/index.html

_____________________________________________________________________

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From fredrik at pythonware.com  Mon Feb  7 14:00:46 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 7 Feb 2005 20:00:46 +0100
Subject: Python Binary and Windows
References: <cu8805$emv$2@news.ox.ac.uk>
Message-ID: <cu8dq0$a5e$1@sea.gmane.org>

"peetm" <peet.morris at comlab.ox.ac.uk> wrote:

> I'd like to compile (?) the DiffLib Python code into a binary form that can
> be called by other Windows apps - like, I'd like to compile it into a DLL.
>
> Is this possible?

you can link your DLL (or application) against the Python DLL, and use
the Python API to pass data from C/C++ to Python, and back again.

for details, see the "embedding" sections in

    http://docs.python.org/api/api.html

</F> 





From steve at holdenweb.com  Tue Feb  8 07:12:39 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 08 Feb 2005 07:12:39 -0500
Subject: def __init__ question in a class definition
In-Reply-To: <1107828542.466555.27160@o13g2000cwo.googlegroups.com>
References: <mailman.2048.1107750192.22381.python-list@python.org>
	<1107754489.980148.277690@c13g2000cwb.googlegroups.com>
	<42076939.6020405@holdenweb.com>
	<1107828542.466555.27160@o13g2000cwo.googlegroups.com>
Message-ID: <4208ACB7.3020605@holdenweb.com>

M.E.Farmer wrote:

> Steve Holden wrote:
> 
>>M.E.Farmer wrote:
>>
>>
>>>>Jeffrey Borkent
>>>>Systems Specialist
>>>>Information Technology Services
>>>
>>>
>>>With that kind of credentials, and the fact that you claim you are
> 
> a
> 
>>>system specialists....
>>>I don't know you have me worried already.
>>>I guess for you I just say RTFM.
>>>If you think that is harsh then don't ask a 2nd grade question yet
>>>claim/pretend to be some sorta system specialists.
>>
>>Hey, ease up, this is comp.lang.python, remember.
>>
>>
>>>You tried searching the archives first I am sure.
>>>Go here  http://www.python.org and *read*, come back when you are
>>>really stuck.
>>>M.E.Farmer
>>>P.S. YES the __ matter, they identify special methods ! __init__ is
> 
> the
> 
>>>class CONSTRUCTOR.
>>>
>>
>>Next time, could we try exchanging the body of the message and the
> 
> PS?
> 
>>That way you could have omitted the PS when you got half way through
> 
> it
> 
>>and realised you were just wasting your time and everyone else's ...
>>
>>got-out-the-wrong-side-of-bed-ly y'rs  - steve
>>--
>>Meet the Python developers and your c.l.py favorites March 23-25
>>Come to PyCon DC 2005                      http://www.pycon.org/
>>Steve Holden                           http://www.holdenwewb.com
> 
> P.S. And in an effort to keep on topic...PYCON!!
> steve,
> I stand by what I said.
> Teach a man to fish feed him for a lifetime.
> Re-read it, memorize it, and keep it near.
> I read comp.lang.py for 3 years before I posted anything, and then i
> posted an ANSWER!
> I don't go around asking dirt simple questions that would be solved
> with a quick read of the docs, usenet archives , Google, books that
> have been written about Python,etc.... He should have been *reading*
> not *posting*.
> I can not understand why you have a problem with me pointing out he
> should read the documentation. Why do you think RTFM exist, for people
> like that, they are a timesink. He can redeem himself if he just goes
> and reads a little and comes back looking like he made some effort.
> This guy has a 6 mile sig that says he ought to know better. Had he
> come with a different sig *maybe* and a question that did not scream
> '''HEY I WANT YOU TO ANSWER EVERYTHING FOR ME BECAUSE I CAN NOT EVEN
> READ THE BASIC DOCUMENTATION ON MY OWN'''.
> 
> 
>>Next time, could we try exchanging the body of the message and the
> 
> PS?
> 
>>That way you could have omitted the PS when you got half way through
> 
> it
> 
>>and realised you were just wasting your time and everyone else's ...
> 
> 
> I tell him where he is wrong first then I answer the question, sounds
> like *YOU* ....Now I have your attention.
> What do you think that post was meant to do? Snap him off at the root?
> Make him cry? Maybe it was to nudge him to read the docs, so he can
> *learn* on his own.
> Next time you could just write my post for me! That way I can only
> waste as much time as you deem acceptable! Now that I think about it,
> if we just answer every question every poster has about any detail of
> Python, then we can all sing along and hold hands, who needs to write
> documentation or even books about Python look at all the time we will
> save...
> 
> 
>>got-out-the-wrong-side-of-bed-ly y'rs  - steve
> 
> Which-side is-the wrong-side-ly yr's - M.E.Farmer
> 
Well, actually my point was that if we just save time by not answering 
such questions we avoid a reputation for hostility while still 
encouraging people to use other resources. But anyway, thanks for saying 
"PyCon"!

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From jstroud at mbi.ucla.edu  Sun Feb 27 17:48:14 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 27 Feb 2005 14:48:14 -0800
Subject: TKinter
In-Reply-To: <38eb4lF5nldh7U1@individual.net>
References: <38eb4lF5nldh7U1@individual.net>
Message-ID: <200502271448.15168.jstroud@mbi.ucla.edu>

I thought the T was silent.

On Sunday 27 February 2005 08:34 am, anthonyberet wrote:
> So, is it pronounced 'Tee-Kinter', or 'Tee-Kay-Inter'?
> I don't want to appear as a dork down the pub.


From antonyliu2002 at yahoo.com  Fri Feb 25 23:47:41 2005
From: antonyliu2002 at yahoo.com (Anthony Liu)
Date: Fri, 25 Feb 2005 20:47:41 -0800 (PST)
Subject: Which module is "set " in?
Message-ID: <20050226044741.41746.qmail@web54509.mail.yahoo.com>

I want to use the set function like

    mylist = ['a', 'b', 'b', 'd', 'e', 'a']
    myset  = set (mylist)

But I don't know what to import, I tried sys, sets,
they don't work.

What's the easy way to find out the module that
contains a particular function?


		
__________________________________ 
Do you Yahoo!? 
Yahoo! Mail - Find what you need with new enhanced search.
http://info.mail.yahoo.com/mail_250


From mhartl at post.harvard.edu  Wed Feb 16 15:32:37 2005
From: mhartl at post.harvard.edu (Michael Hartl)
Date: 16 Feb 2005 12:32:37 -0800
Subject: Test for structure
References: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
	<Q5idne-AU8PsPI7fRVn-3A@comcast.com>
Message-ID: <1108585957.015878.52530@f14g2000cwb.googlegroups.com>

I use a function isListLike in cases such as this one:

# def isListLike(L):
#     """Return True if L is list-like, False otherwise."""
#     try:
#         L + []
#         return True
#     except:
#         return False

Then you can use a standard if-else construct:

# if isListLike(myvar):
#     <do something>
# else:
#     <do something else>

Michael

--
Michael D. Hartl, Ph.D.
Chief Technology Officer
http://quarksports.com/



From onurb at xiludom.gro  Tue Feb 22 07:49:28 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Tue, 22 Feb 2005 13:49:28 +0100
Subject: NOOB coding help....
In-Reply-To: <03f8baafb2634534c398d3ddcc476158@localhost.talkaboutprogramming.com>
References: <69012ed09e48920e1e80e311bca1659c@localhost.talkaboutprogramming.com>
	<sKGdnSm3e5NyK4ffRVn-2g@comcast.com>
	<03f8baafb2634534c398d3ddcc476158@localhost.talkaboutprogramming.com>
Message-ID: <421b2a59$0$14818$636a15ce@news.free.fr>

Igorati wrote:
> #This program will ask for a user to imput numbers. The numbers will then
> be calculated
> #to find the statistical mean, mode, and median. Finallly the user will be
> asked
> #if he would like to print out the answers.
 >
> numbers = [ ] 
> print 'Enter numbers to add to the list. (Enter 0 to quit.)'

so 0 is not a valid value ?
Since you only want numbers, any alpha char could be used to exit...

> def getint():
>      return int(raw_input('Number? '))

What happens if the user type "foo" ?

> numbers = sorted(iter(getint, 0))
> 
> numbers
> [2, 3, 5, 7]
> def variable_median(x):
>      
>      return sorted(x)[len(x)//2]
> def variable_mode(x):
>      
>      counts = {}
>      for item in x:
>          counts[x] = counts.get(x, 0) + 1
>      
>      return sorted(counts, key=counts.__getitem__, reverse=True)[0]
> 
> 
> 
> s = variableMean(numbers)
> y = variableMedian(numbers)
> t = variableMode (numbers)
> 
> import pickle
> pickle.dump((s, y, t), file('avg.pickle', 'w'))

Take care of removing hard-coded filenames... (this is ok for testing 
but should not be released like this)

> 
> print 'Thank you! Would you like to see the results after calculating'
> print 'The mode, median, and mean? (Please enter Yes or No)'
> print 'Please enter Yes or No:'
> 
> 
> if raw_input == yes:

First, raw_input() is a function, you need to use the () operator to 
*call* (execute) the function.

Then, raw_input() returns a string. A string is something between 
quotes. Yes is a symbol (a variable name, function name or like), not a 
string. And since this symbol is not defined, you have an exception.

What you want to do is to compare the string returned by the raw_input() 
function to the literral string "Yes". What you're doing in fact is 
comparing two symbols, one being defined, the other one being undefined...

   if raw_input() == "Yes":

> 
>     f = open("avg.py","r")
Same remark as above about hard-coded file names...

>     avg.py = f.read()

Notice that the dot is an operator. Here you trying to access the 
attribute 'py' of an (actually inexistant) object named 'avg'. What you 
want is to bind the data returned by f.read() to a variable.

       data = f.read()


>     print 'The Mean average is:', mean
>     print 'The Median is:', meadian
>     print 'The Mode is:', mode

At this time, mean, meadian and mode are undefined symbols. Since you 
used the pickle module to persist your data, you should use it to 
unserialize'em too. The pickle module is well documented, so you may 
want to read the manual.

> 
> I got the error:
> 
> Traceback (most recent call last):
>   File "C:\Python24\Lib\New Folder\Wade_StoddardSLP3-2.py", line 9, in ?
>     numbers = sorted(iter(getint, 0))
>   File "C:\Python24\Lib\New Folder\Wade_StoddardSLP3-2.py", line 7, in
> getint
>     return int(raw_input('Number? '))
> TypeError: 'str' object is not callable

Can't tell you since I'm running python 2.3.x here (sorted() is new in 2.4)

> and this one for my if statement:
> 
> Traceback (most recent call last):
>   File "C:\Python24\Lib\New Folder\Wade_StoddardSLP3-2.py", line 39, in ?
>     if raw_input == Yes:
> NameError: name 'Yes' is not defined

See above.

> I cannot understand how I can define yes so that when they type yes the
> data is printed out. 

Yes = 'yes' ?-)

> Also if they type no how do I make the program do
> nothing. Or is that just infered.

May I suggest that you :
- subscribe to the 'tutor' mailing-list (it's a ml for absolute beginners)
- do some tutorials (there's one with the doc, and many others freely 
available on the net)
- use the interactive python shell to test bits of your code ?

HTH
Bruno
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for 
p in 'onurb at xiludom.gro'.split('@')])"


From jfj at freemail.gr  Sun Feb 13 06:21:03 2005
From: jfj at freemail.gr (jfj)
Date: Sun, 13 Feb 2005 03:21:03 -0800
Subject: Iterate through dictionary of file objects and file names
In-Reply-To: <cuku8r$q5s$1@eeyore.INS.cwru.edu>
References: <420deb18$1_1@news.iprimus.com.au>
	<cuku8r$q5s$1@eeyore.INS.cwru.edu>
Message-ID: <420F381F.8080203@freemail.gr>

Brian Beck wrote:
>         print "Closed: %s" % fileName

Call me a pedant, but what'd wrong with:

     print 'closed: ' + filename
or
     print 'closed:', filename

?

Modulus operator good but don't over-use it. Otherwise, bad style.


jfj




From ted.lilley at gmail.com  Sat Feb 19 02:42:31 2005
From: ted.lilley at gmail.com (Ted Lilley)
Date: 18 Feb 2005 23:42:31 -0800
Subject: lambda closure question
Message-ID: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>

What I want to do is pre-load functions with arguments by iterating
through a list like so:

>>>class myclass:
...    pass
>>>def func(self, arg):
...    print arg
>>>mylist = ["my", "sample", "list"]
>>>for item in mylist:
...    setattr(myclass, item, lamdba self: func(self, item))

This attaches a list of functions to the class, making them bound
methods when called from a class instance.  The functions are all
similar except that they know their name through the item argument.
The lambda takes the underlying function and preloads it with its name,
and since lambdas support closures, it remembers the item variable that
was used to create it when it is actually called like so:

>>>obj = myclass()
>>>obj.list()
list

That's great, since I can write a generic function that just needs to
know its name to make a slight modification to its behavior, then
attach it a bunch of times to a class under different names.

Unfortunately, it doesn't work.  It seems the closure keeps track of
the variable fed to it dynamically - if the variable changes after the
lambda is created, the lambda still references the _variable_ not the
original _value_ and so gets the new value like so:

>>>obj.sample()
list
>>>obj.my()
list

At least, that's the explanation I'm deducing from this behavior.
Assuming that's the way Guido intended it to be (about as dynamic as it
can get), I'm at a loss to do what _I_ want it to do.  In fact, I don't
think there's any way to generate the lambdas properly without coding
in the name as a literal string, since any attempt to use a variable
reference will always get modified as the loop iterates.

Am I missing something?  Help.



From hgk at et.uni-magdeburg.de  Mon Feb 28 07:51:17 2005
From: hgk at et.uni-magdeburg.de (Hans Georg Krauthaeuser)
Date: Mon, 28 Feb 2005 13:51:17 +0100
Subject: Text To Speech with pyTTS
In-Reply-To: <4221b0b6$0$1998$afc38c87@news.optusnet.com.au>
References: <4221b0b6$0$1998$afc38c87@news.optusnet.com.au>
Message-ID: <cvv446$kd8$1@fuerst.cs.uni-magdeburg.de>

Mike P. wrote:
> Hi,
> I was wondering if anyone has had any luck with the python text to speech
> (pyTTS) module available on Sourceforge:
> http://sourceforge.net/projects/uncassist
> 
> I have followed the tutorial for pyTTS at:
> http://www.cs.unc.edu/~parente/tech/tr02.shtml
> 
> Using the first simple speech example:
> 
> import pyTTS
> 
> tts = pyTTS.Create()
> tts.Speak("Hello World!")
> 
> I get the following error on the call to pyTTS.Create()
> 
> C:\Program Files\Python23\Lib\site-packages\pyTTS>python
> ActivePython 2.3.2 Build 232 (ActiveState Corp.) based on
> Python 2.3.2 (#49, Nov 13 2003, 10:34:54) [MSC v.1200 32 bit (Intel)] on
> win32
> Type "help", "copyright", "credits" or "license" for more information.
> 
>>>>import pyTTS
>>>>tts = pyTTS.Create()
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "C:\Program Files\Python23\Lib\site-packages\pyTTS\__init__.py", line
> 28, in Create
>     raise ValueError('"%s" not supported' % api)
> ValueError: "SAPI" not supported
> ...

The TTSFast.py file is missing in the 2.3 distribution. I made a copy 
from the 2.4 dist and everything worked fine for me.

Hans Georg


From miki.tebeka at zoran.com  Tue Feb  8 06:44:18 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Tue, 8 Feb 2005 13:44:18 +0200
Subject: email extraction program
In-Reply-To: <20050206232317.97390.qmail@web30108.mail.mud.yahoo.com>
References: <20050206232317.97390.qmail@web30108.mail.mud.yahoo.com>
Message-ID: <20050208114355.GD2156@zoran.com>

Hello Paul,

>    Can you help me create an ebay email extraction program ?
> 
>    I have some ebay scripts which worked and extracted emails from
>    ebay.com but these days don't work.
http://www.catb.org/~esr/faqs/smart-questions.html

HTH.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys


From csgcsg39 at hotmail.com  Thu Feb  3 10:48:05 2005
From: csgcsg39 at hotmail.com (C Gillespie)
Date: Thu, 3 Feb 2005 15:48:05 -0000
Subject: Calling a method using an argument
Message-ID: <ctth3v$o2r$1@ucsnew1.ncl.ac.uk>

Dear All,

I have a simple class
class hello:
    def world(self):
        return 'hello'
    def test(self,arg):
        return self.arg

When I want to do is:
>hello.test('world')
'hello'

i.e. pass the method name as an argument. How should I do this?

Thanks

Colin




From caleb1 at telkomsa.net  Thu Feb  3 23:13:14 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Thu, 03 Feb 2005 23:13:14 -0500
Subject: python and visual C++
References: <ctqdtb$lm7$1@news.univ-rennes1.fr>
	<opsllp87k61js0xs@news.telkomsa.net>
	<ctsold$i5u$1@news.univ-rennes1.fr>
Message-ID: <opslnncczq1js0xs@news.telkomsa.net>

Olivier

> But the problem is about modules thats are developped from others with
> distutils...

Yes, sorry, I reread your original post and now realise that you were  
referring to other people's modules.  And with your comments there, I  
agree with you -> MSVC as a requirement is unfortunate.

thx
Caleb


From jao at geophile.com  Sat Feb 26 19:42:25 2005
From: jao at geophile.com (Jack Orenstein)
Date: Sat, 26 Feb 2005 19:42:25 -0500
Subject: Thread scheduling
In-Reply-To: <09Kdndga9dgQkrzfRVn-hg@powergate.ca>
References: <1109456481.214243.140670@l41g2000cwc.googlegroups.com>	<mailman.3100.1109457191.22381.python-list@python.org>
	<09Kdndga9dgQkrzfRVn-hg@powergate.ca>
Message-ID: <42211771.40307@geophile.com>

Peter Hansen wrote:
 > Jack Orenstein wrote:
 >
 >> I am using Python 2.2.2 on RH9, and just starting to work with Python
 >> threads.
 >
 >
 > Is this also the first time you've worked with threads in general,
 > or do you have much experience with them in other situations?

Yes, I've used threading in Java.

 > You've got two shared global variables, "done" and "counter".
 > Each of these is modified in a manner that is not thread-safe.
 > I don't know if "counter" is causing trouble, but it seems
 > likely that "done" is.

I understand that. As I said in my posting, "The counter is
incremented without locking -- I expect to see a final count of less
than THREADS * COUNT." This is a test case, and I threw out more and
more code, including synchronization around counter and done, until it
got as simple as possible and still showed the problem.

 > Basically, the statement "done += 1" is equivalent to the
 > statement "done = done + 1" which, in Python or most other
 > languages is not thread-safe.  The "done + 1" part is
 > evaluated separately from the assignment, so it's possible
 > that two threads will be executing the "done + 1" part
 > at the same time and that the following assignment of
 > one thread will be overwritten immediately by the assignment
 > in the next thread, but with a value that is now one less
 > than what you really wanted.

Understood. I was counting on this being unlikely for my test
case. I realize this isn't something to rely on in real software.


 > If you really want to increment globals from the thread, you
 > should look into locks.  Using the "threading" module (as is
 > generally recommended, instead of using "thread"), you would
 > use threading.Lock().

As my note said, I did start with the threading module. And variables
updated by different threads were protected by threading.Condition
variables. As I analyzed my test cases, and threading.py, I started
suspecting thread scheduling.  I then wrote the test case in my email,
which does not rely on the threading module at all. The point of the
test is not to maintain counter -- it's to show that sometimes even
after one thread completes, the other thread never is scheduled
again. This seems wrong. Try running the code, and let me see if you
see this behavior.

If you'd like, replace this:

     counter += 1

by this:

     time.sleep(0.000001 * id)

You should see the same problem. So that removes counter from the
picture. And the two increments of done (one by each thread) are still
almost certainly not going to coincide and cause a problem. Also, if
you look at the output from the code on a hang, you will see that
'thread X: leaving' only prints once. This has nothing to do with what
happens with the done variable.

Jack


From ilias at lazaridis.com  Sun Feb 13 13:41:59 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sun, 13 Feb 2005 20:41:59 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
Message-ID: <cuo71l$gig$1@usenet.otenet.gr>

I'm a newcomer to python:

[EVALUATION] - E01: The Java Failure - May Python Helps?
http://groups-beta.google.com/group/comp.lang.python/msg/75f0c5c35374f553

-

I've download (as suggested) the python 2.4 installer for windows.

Now I have problems to compile python extension that some packages 
depend on.

I use the MinGW open-source compiler.

-

My questions:

a) Why does the Python Foundation not provide additionally a binary 
version, compiled with MinGW or another open-source compiler?

b) Why does the Python Foundation not ensure, that the python 
source-code is directly compilable with MinGW?

c) Why are the following efforts not _directly_ included in the python 
source code base?

http://jove.prohosting.com/iwave/ipython/pyMinGW.html

above link found in this thread:

http://groups-beta.google.com/group/comp.lang.python/msg/c9f0444c467de525

d) Is it really neccessary that I dive into such adventures, to be able 
to do the most natural thing like: "developing python extensions with 
MinGW"?

http://starship.python.net/crew/kernr/mingw32/Notes.html

e) Is there any official statement available regarding the msvcr71.dll 
and other MS licensing issues?

[see several threads "[Python-Dev] Is msvcr71.dll re-redistributable?"]

http://mail.python.org/pipermail/python-dev/2005-February/thread.html

f) Are there any official (Python Foundation) statements / rationales 
available, which explain why the MinGW compiler is unsupported, although 
parts of the community obviously like to use it?

http://groups-beta.google.com/group/comp.lang.python/msg/dc3474e6c8053336

-

I just want to understand.

Thankfull for any pointer to official documents / statements.

[google is _not_ a fried here. I like to have a stable development 
environment, which is supported by the official projects, thus it can 
pass quality-assurance without beeing afraid about every next release.]

.

-- 
http://lazaridis.com


From bdesth.quelquechose at free.quelquepart.fr  Thu Feb  3 04:42:09 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 03 Feb 2005 10:42:09 +0100
Subject: IDLE history, Python IDE, and Interactive Python with Vim
In-Reply-To: <mailman.1790.1107402279.22381.python-list@python.org>
References: <opsllommgvb1cml1@ashot>
	<mailman.1790.1107402279.22381.python-list@python.org>
Message-ID: <4201efbe$0$518$636a15ce@news.free.fr>

Daniel Bickett a ?crit :
> This is certainly a worthy topic. There are several IDEs for Python
> (one I like very much being Komodo) that have plenty of fancy
> debugging features and advanced operations, however I have yet to
> encounter (elsewhere) the convenience that comes with being able to
> press F5 and have an interactive interpreter load my code and be ready
> for testing.

Try emacs + python-mode.



From aahz at pythoncraft.com  Fri Feb  4 13:37:47 2005
From: aahz at pythoncraft.com (Aahz)
Date: 4 Feb 2005 13:37:47 -0500
Subject: Thread in python
References: <1107533540.641969.191940@z14g2000cwz.googlegroups.com>
	<1107534038.823409.89650@l41g2000cwc.googlegroups.com>
	<4rNMd.103073$Jk5.93452@lakeread01>
Message-ID: <cu0fdr$ee7$1@panix1.panix.com>

In article <4rNMd.103073$Jk5.93452 at lakeread01>,
Steve Holden  <steve at holdenweb.com> wrote:
>
>http://starship.python.net/crew/aahz/OSCON2001/index.html

Thanks!  But while that's still good (for the code, if nothing else), it
ought to be at least supplemented with
http://heather.cs.ucdavis.edu/~matloff/Python/PyThreads.pdf
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From jerf at jerf.org  Tue Feb 22 21:29:10 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 22 Feb 2005 21:29:10 -0500
Subject: compatbility of .pyc files
References: <421BCED0.2070206@irl.cri.nz>
Message-ID: <pan.2005.02.23.02.29.10.173247@jerf.org>

On Wed, 23 Feb 2005 13:31:12 +1300, Blair Hall wrote:

> I have a requirement to prevent 'accidental' tampering
> with some software written in Python. If I ensure that all
> of the modules concerned are compiled into .pyc's, and remove
> the .py's to another location, then I should be safe until
> the next upgrade of the Python interpretter.

Depending on how "scare quote-y" the scare quotes are, if you're really
out to avoid accidental tampering, why not just set the *.py files to
read-only? 

Beyond that you get into rapidly diminishing returns; removing the .py
files is feasible if you have some semblance of control over the
interpreter, beyond that and you're usually better off with a binding
legal agreement.


From steven.bethard at gmail.com  Mon Feb 21 16:37:22 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 21 Feb 2005 14:37:22 -0700
Subject: Tuple index
In-Reply-To: <1109021422.351702.296640@o13g2000cwo.googlegroups.com>
References: <cvbcc6$b5f$1@news.netins.net>
	<1108951559.490554.305310@l41g2000cwc.googlegroups.com>
	<cvdian$ejs$1@news.netins.net>
	<1109021422.351702.296640@o13g2000cwo.googlegroups.com>
Message-ID: <nJudna96VJ0TyYffRVn-2g@comcast.com>

Michael Hartl wrote:
> I actually find it strange that tuples don't have an index function,
> since finding the index doesn't involve any mutation.  Anyone know why
> Python doesn't allow a statement like t.index('foo')?

Tuples aren't really intended for this kind of use.  See:

http://www.python.org/doc/faq/general.html#why-are-there-separate-tuple-and-list-data-types

Tuples are supposed to be operated on as a group.  It's even been 
suggested occasionally on python-dev that in Python 3.0, tuples 
shouldn't support iteration at all...

STeVe


From kdahlhaus at yahoo.com  Sat Feb 19 14:25:50 2005
From: kdahlhaus at yahoo.com (kdahlhaus at yahoo.com)
Date: 19 Feb 2005 11:25:50 -0800
Subject: Chart Director?
In-Reply-To: <cv6pfa$1dc$1@news4.zwoll1.ov.home.nl>
References: <1108739705.870161.36050@z14g2000cwz.googlegroups.com>
	<cv6pfa$1dc$1@news4.zwoll1.ov.home.nl>
Message-ID: <1108841150.342993.323160@c13g2000cwb.googlegroups.com>

Actually, that's exactly what I did last night.  I found it all of the
things you said.  Consistent api across functions, lots of methods of
formatting data labels.  A+ on the documentation and examples.   It
also includes various meters and gauges that I thought might add to the
application.  I'm comparing it to the charting  in Report Lab.  I love
the fact that Report Lab lets you specify a function to call to
translate data points to labels.  At this point I will still continue
to evaluate it, but so far it probably is not compelling enough to move
from Report Labs.  I would highly recommend those need a graphics
package look at CD though.



From rigga at hasnomail.com  Sun Feb 27 15:04:29 2005
From: rigga at hasnomail.com (Rigga)
Date: Sun, 27 Feb 2005 20:04:29 GMT
Subject: Need help running external program
References: <c2nUd.3268977$B07.514197@news.easynews.com>
	<cvsvbb$nne$01$1@news.t-online.com>
	<vMnUd.3552914$f47.637318@news.easynews.com>
	<38ejcfF5lu11pU1@individual.net>
Message-ID: <hJpUd.3282122$B07.516470@news.easynews.com>

Tim Jarman wrote:

> Rigga wrote:
> 
>> Pink wrote:
>> 
>>> Rigga wrote:
>>> 
>>>> Hi,
>>>> 
>>>> I am running the line of code below from a shell script and it works
>>>> fine, however I am at a total loss on how i can run it from within a
>>>> Python script as every option I have tried fails and it appears to be
>>>> down to the escaping of certain characters.
>>>> 
>>>> wget -q www.anywebpage.com -O - | tr '\r' '\n' | tr \' \" | sed -n
>>>> 's/.*url="\([^"]*\)".*/\1/p'
>>> If your problem is getting a python string without worrying about how to
>>> escape the escape sequences, try:
>>> 
>>> r"""wget -q www.anywebpage.com -O - | tr '\r' '\n' | tr \' \" | sed -n
>>> 's/.*url="\([^"]*\)".*/\1/p'"""
>>> 
>>> You should be able to pass this directly to a popen() function.
>> 
>> Hi,
>> 
>> Thanks for replying however I have just tried that and it does not seem
>> to work, it doesnt return any results (i take it the r was a typo)
>> 
>> Thanks
>> 
>> RiGGa
> 
> No, the r was the point - it's there to tell Python not to do any escaping
> on the string. Try it again with the r and see what happens.
> 
Brilliant!!!  that works a treat thankyou!!, where on earth did you find out
about the 'r'  any pointers to documentation appreciated.

Thanks 

RiGGa


From mahs at telcopartners.com  Wed Feb 16 23:51:55 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 16 Feb 2005 20:51:55 -0800
Subject: Iterator / Iteratable confusion
In-Reply-To: <cuu3p0$55n$1@sea.gmane.org>
References: <420a5c1e$0$21630$a1866201@visi.com><slrnd0q67t.52v.curty@einstein.electron.net><200502131848.03655.francis.girard@free.fr>	<200502131958.27410.francis.girard@free.fr><cuolu7$qv7$1@sea.gmane.org>	<cuooip$1pd$1@sea.gmane.org><curt3v$lmf$1@sea.gmane.org>	<cuthdk$dnq$1@sea.gmane.org>
	<cuu3p0$55n$1@sea.gmane.org>
Message-ID: <cv17o1$jk9$1@sea.gmane.org>

Terry Reedy wrote:
>> "Michael Spencer" <mahs at telcopartners.com> wrote in message 

> 
> We are both interested in the murky edges at and beyond conventional usage.
> 
...
> I am quite aware that multiple iterators for the same iterable (actual or 
> conceptual) can be useful (cross products, for example).  But I am dubious 
> that initialized clones of 'iterators' are *more* useful, especially for 
> Python, than multiple iterators derived from repeated calling of the 
> callable that produced the first iterator.

I'm not sure they are.  In the one 'real' example I posted on infinite series, I 
implemented the approach you advocate here.  But I'm keeping copyable iterators 
in mind.


> Here are some related reasons why I think it useful if not essential to 
> restrict the notion of iterator by restricting  iterator.__iter__ to 
> returning self unmodified.
> 
> Leaving Python aside, one can think of iterable as something that 
> represents a collection and that can produce an iterator that produces the 
> items of the collection one at a time.  In this general conceptioning, 
> iterables and iterators seem distinct (if one ignores self-iterables).

The separation is appealing, but blurrier in practice, I believe.  Neither 
itertools.cycle nor itertools.tee fits cleanly into this model.  Neither do the 
self-iterables, as you point out.

> ... giving iterators an __iter__ method, while quite useful, erases 
> (confuses) the (seeming) distinction, but giving them a minimal __iter__ 
> does so minimally, keeping iterators a distinct subcategory of iterable. 

Iterators that could not be presented to other functions for filtering or 
whatnot would be pretty limited. Unless every iterator is to be derived from 
some special-cased object, how could they not have an __iter__ method?
I accept your point that keeping the functionality of iterator.__iter__ minimal 
and predicatable limits the confusion between iterators and iterables.  But 
since that distinction is already blurred in several places, I don't find that 
argument alone decisive.

 > ...
> 
> Taking Python as it is, a useful subcategory of iterable is 'reiterable'. 
> This is distinct from iterator strictly defined.

What about itertools.cycle?  Not strictly an iterator?

   This we have iterables
> divided into iterators, reiterables, and other.  I think this is 
> didactically useful.  Spencerators are reiterables.

They may be: they are no more and no less than a thought experiment in which 
iterator.__iter__ does not return self unmodified.

> 
> Iter(iterator) returning iterator unchanged makes iterator a fixed point of 
> iter.  It ends any chain of objects returned by repeated iter calls. 
> Spencerators prolong any iter chain, making it infinite instead of finite. 
> Essential?  Repeat the paragraph above with 'a fixed point' substituted for 
> 'minimal'.
> 
I don't understand this point except in the loosest sense that deviating from
the iterator protocol makes it harder to reason about the code.  Do you mean 
something more specific?

I have been thinking about iterator.__iter__ rather like object.__new__.  Not 
returning a new instance may be surprising and inadvisable in most cases.  But 
still there are accepted uses for the technique.  Do you think these cases are 
comparable?

Do you see the iterator protocol as the vanguard of a new set of python 
protocols that are more semantically restictive than the "mapping, container, 
file-like object etc..." interfaces?  Defining iterator method semantics 
strictly seems like a departure from the existing situation.

Cheers

Michael








From quentel.pierre at wanadoo.fr  Fri Feb 18 14:49:11 2005
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: 18 Feb 2005 11:49:11 -0800
Subject: Probably over my head... Trying to get Font Names
References: <B8KdneiuyLaKoYjfRVn-vQ@adelphia.com>
Message-ID: <3269a8ba.0502181149.275ca26f@posting.google.com>

"Samantha" <samantha7395 at hotmail.com> wrote in message news:<B8KdneiuyLaKoYjfRVn-vQ at adelphia.com>...
> I am attempting to extract the Font Names from the installed windows fonts. 
> I am having a heck of a time getting these rather than the file names. 
> Examples can be seen by going to Control Panel > Fonts
> 
> Any help or direction is appreciated.
> S

Try this :

Python 2.3.2 (#49, Oct  2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from Tkinter import Tk
>>> import tkFont
>>> root=Tk()
>>> print tkFont.families(root)


From joakim.storck at home.se  Wed Feb  2 12:16:57 2005
From: joakim.storck at home.se (Joakim Storck)
Date: 2 Feb 2005 09:16:57 -0800
Subject: Hash of class from instance
In-Reply-To: <Xns95F1AE4AFCC36duncanrcpcouk@127.0.0.1>
References: <1107363342.531396.238350@g14g2000cwa.googlegroups.com>
	<Xns95F1AE4AFCC36duncanrcpcouk@127.0.0.1>
Message-ID: <1107364617.371795.13740@l41g2000cwc.googlegroups.com>

Thanks!

Not so strange I think, the hash values of classes will be used as keys
in a dictionary that serve as an object pool.

Sorry about the double posting, I got a 'server error' message the
first time, so I figured it hadn't gone trhough.

/Joakim



From sjmachin at lexicon.net  Mon Feb 28 21:02:18 2005
From: sjmachin at lexicon.net (John Machin)
Date: 28 Feb 2005 18:02:18 -0800
Subject: Canonical way of dealing with null-separated lines?
In-Reply-To: <lcr7j0uq3o.fsf@gaffa.mit.edu>
References: <lcll9efw8l.fsf@gaffa.mit.edu>
	<mailman.3006.1109264015.22381.python-list@python.org>
	<5aes11d4da95un1n78vtb04m43269hqo4m@4ax.com>
	<mailman.3020.1109281886.22381.python-list@python.org>
	<lc7jkvdcxq.fsf@gaffa.mit.edu> <lcis4esyx0.fsf@gaffa.mit.edu>
	<lcr7j0uq3o.fsf@gaffa.mit.edu>
Message-ID: <1109642538.040399.60890@z14g2000cwz.googlegroups.com>


Douglas Alan wrote:
> I wrote:
>
> > Oops, I just realized that my previously definitive version did not
> > handle multi-character newlines.  So here is a new definitive
> > version.  Oog, now my brain hurts:
>
> I dunno what I was thinking.  That version sucked!  Here's a version
> that's actually comprehensible, a fraction of the size, and works in
> all cases.  (I think.)
>
> def fileLineIter(inputFile, newline='\n', leaveNewline=False,
readSize=8192):
>    """Like the normal file iter but you can set what string indicates
newline.
>
>    The newline string can be arbitrarily long; it need not be
restricted to a
>    single character. You can also set the read size and control
whether or not
>    the newline string is left on the end of the iterated lines.
Setting
>    newline to '\0' is particularly good for use with an input file
created with
>    something like "os.popen('find -print0')".
>    """
>    outputLineEnd = ("", newline)[leaveNewline]
>    partialLine = ''
>    while True:
>        charsJustRead = inputFile.read(readSize)
>        if not charsJustRead: break
>        lines = (partialLine + charsJustRead).split(newline)

The above line is prepending a short string to what will typically be a
whole buffer full. There's gotta be a better way to do it. Perhaps you
might like to refer back to CdV's solution which was prepending the
residue to the first element of the split() result.

>        partialLine = lines.pop()
>        for line in lines: yield line + outputLineEnd

In the case of leaveNewline being false, you are concatenating an empty
string. IMHO, to quote Jon Bentley, one should "do nothing gracefully".


>    if partialLine: yield partialLine
> 
> |>oug



From http  Thu Feb 17 00:09:12 2005
From: http (Paul Rubin)
Date: 16 Feb 2005 21:09:12 -0800
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<mailman.2735.1108616299.22381.python-list@python.org>
Message-ID: <7xoeejlqmf.fsf@ruckus.brouhaha.com>

John Lenton <john at grulic.org.ar> writes:
>             flock(fp, LOCK_EX) # block until can write ...
> Of course I'm probably overlooking something, because it really can't
> be this easy, can it?

Yes, maybe so.  I'm just way behind the times and didn't realize flock
would block until existing incompatible locks are released.  That may
solve the whole timeout/retry problem.  I should have checked the docs
more carefully earlier; I was thinking only in terms of opening with
O_EXCL.  Thanks!


From jicman at cinops.xerox.com  Tue Feb  8 19:42:59 2005
From: jicman at cinops.xerox.com (jose isaias cabrera)
Date: Tue, 8 Feb 2005 19:42:59 -0500
Subject: Java Integer.ParseInt translation to python
References: <008d01c507f4$451d9b30$2820790d@stso.xcdg.xerox.com>
	<372a762405013116263a4e93b7@mail.gmail.com>
Message-ID: <001a01c50e40$4e00ac90$2820790d@stso.xcdg.xerox.com>


Ok, so this,

>> buffer[0] = (byte)Integer.parseInt(string,16);

in java is, partly, this

buffer[0] = int(string, 16)

in python.  But here is my problem.  When I call this java subroutine,

  byte[] decodeKey(String inString)
  {
    if (inString == null)
            return null;

    System.out.println("StringLength = " + inString.length());
    byte[] retBuf = new byte[inString.length()/2];
    // The string has two hex characters per byte.
    for (int index = 0; index < retBuf.length; index++)
    {
      System.out.print(inString.substring(2*index, 2*index+2));
      System.out.println(" " +
        Integer.parseInt(inString.substring(2*index, 2*index+2), 16) + " " +
        (byte)Integer.parseInt(inString.substring(2*index, 2*index+2), 16));
      retBuf[index] =
        (byte)Integer.parseInt(inString.substring(2*index, 2*index+2), 16);
    }
    System.out.println(retBuf);

    return retBuf;
  }

I get this output:
StringLength = 40
c1 193 -63
7c 124 124
e1 225 -31
86 134 -122
ab 171 -85
94 148 -108
ee 238 -18
b0 176 -80
de 222 -34
8a 138 -118
e3 227 -29
b5 181 -75
b7 183 -73
51 81 81
a7 167 -89
c4 196 -60
d8 216 -40
e9 233 -23
ed 237 -19
eb 235 -21
[B at 1616c7

But, here is what I have for python,

def PrepareHash(HashStr):
  while len(HashStr) > 0:
    byte = HashStr[0:2]
    print byte,int(byte,16),byte(int(byte,16)) # & 0xff
    HashStr = HashStr[2:]
  return byte

def Main():
  HashStr = "c17ce186ab94eeb0de8ae3b5b751a7c4d8e9edeb"
  HashStr = PrepareHash(HashStr)
  print "Prepared HashStr :",HashStr

Main()

and it results to,

mulo 19:32:06-> python test.py
c1 193 ?
7c 124 |
e1 225 ?
86 134
ab 171 ?
94 148
ee 238 ?
b0 176 ?
de 222 ?
8a 138
e3 227 ?
b5 181 ?
b7 183 ?
51 81 Q
a7 167 ?
c4 196 ?
d8 216 ?
e9 233 ?
ed 237 ?
eb 235 ?

which is not even close, and yes, I know that it's not the same code.  So, 
the question is, how can I make this java (byte) call in python? so that the 
result would be the right one, "[B at 1616c7"

Thanks.

jos?






From BOOGIEMANPN at YAHOO.COM  Sun Feb 13 10:29:56 2005
From: BOOGIEMANPN at YAHOO.COM (BOOGIEMAN)
Date: Sun, 13 Feb 2005 16:29:56 +0100
Subject: Alternative to raw_input ?
References: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>	<mailman.2400.1108139722.22381.python-list@python.org>	<w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>	<cuio9f$13k8$1@ns.felk.cvut.cz>	<ckkuclxhhrv7$.1lqqmenvnqvg5$.dlg@40tude.net>	<MKSdnYiccMgv8ZDfRVn-hg@powergate.ca>
	<my27ag7r6ca1$.wfp66yydaeqw$.dlg@40tude.net>
	<mailman.2469.1108260511.22381.python-list@python.org>
Message-ID: <1gydyq1m4316i.1z21x6hfdwzk.dlg@40tude.net>

On Sun, 13 Feb 2005 12:08:26 +1000, Nick Coghlan wrote:

> Try this:
> 
> print "Hit a key!"
> cekaj()
> print "Nap time!"
> time.sleep(15)
> print "Hit another key!"
> cekaj()
> 
> with the two different implementations, and see what happens if you hit a key 
> when the 'Nap Time!' prompt appears.

I see the difference now, thanks


From marmille at gmail.com  Sat Feb  5 21:45:28 2005
From: marmille at gmail.com (Martin Miller)
Date: 5 Feb 2005 18:45:28 -0800
Subject: "pickle" vs. f.write()
References: <opsk7f4zcua89mar@condor>
	<mailman.1393.1106776145.22381.python-list@python.org>
	<41FF70A5.8070806@tx3.com> <pan.2005.02.02.10.26.20.738045@gmx.net>
Message-ID: <1107657928.277563.186760@l41g2000cwc.googlegroups.com>

Marc 'BlackJack' Rintsch wrote:
> ...
>
> I write __repr__() methods similar but I think a bit more readable:
>
>   def __repr__(self):
>       return "%s(%r, %r, %r, %r)" % (self.__class__.__name__,
self.name,
>                                      self.age, self.friends,
self.comment)
>
> And it's robust against changing the class name.  It even works in
> subclasses if the signature of the __init__() method stays the same.

Yes, that's an excellent suggestion and improvement.

Saw the following in a post by Steven Bethard on another thread
<http://groups-beta.google.com/group/comp.lang.python/msg/ed6b6ba0346e3c80>
that I think would be even better (in the sense of being more
general/generic) which also ought to work in subclasses. Namely:

    def __repr__(self):
        return '%s(%s)' % (self.__class__.__name__,
                           ', '.join('%s=%r' % (k, v)
                                     for k, v
                                     in self.__dict__.items()))

Martin



From sylvain.thenault at nospam.logilab.fr  Tue Feb  1 05:21:24 2005
From: sylvain.thenault at nospam.logilab.fr (Sylvain Thenault)
Date: Tue, 01 Feb 2005 11:21:24 +0100
Subject: Next step after pychecker
References: <41ff0308$0$6503$636a15ce@news.free.fr>
Message-ID: <pan.2005.02.01.10.21.23.762637@nospam.logilab.fr>

On Tue, 01 Feb 2005 05:18:12 +0100, Philippe Fremy wrote:
> 	Hi,

Hi

> I would like to develop a tool that goes one step further than pychecker
> to ensure python program validity. The idea would be to get close to what
> people get on ocaml: a static verification of all types of the program,
> without any kind of variable declaration. This would definitely brings a
> lot of power to python.
> 
> The idea is to analyse the whole program, identify constraints on function
> arguments and check that these constraints are verified by other parts of
> the program.

Did you take a look at the starkiller [1] and pypy projects [2] ?

> What is in your opinion the best tool to achieve this ? I had an
> extensive look at pychecker, and it could certainly be extended to do
> the job. Things that still concern me are that it works on the bytecode,
> which prevents it from working with jython and the new .NET python.
> 
> I am currently reading the documentation on AST and visitor, but I am
> not sure that this will be the best tool either. The AST seems quite
> deep and I am afraid that it will make the analysis quite slow and
> complicated.
 
are you talking about the ast returned by the "parser" module, or the ast
from the "compiler" module ? The former is a higher abstraction, using
specific class instances in the tree, and most importantly with all the
parsing junk removed. See [3]. You may also be interested in pylint
[4] which is a pychecker like program built in top of the compiler ast,
and so doesn't require actual import of the analyzed code. However it's
not yet as advanced as pychecker regarding bug detection.

And finally as another poster said you should probably keep an eye open
on the python 2.5 ast branch work...

Hope that helps !

[1]http://www.python.org/pycon/dc2004/papers/1/paper.pdf)
[2]http://codespeak.net/pypy/index.cgi?home
[3]http://www.python.org/doc/current/lib/module-compiler.ast.html
[4]http://www.logilab.org/projects/pylint

-- 
Sylvain Th?nault                               LOGILAB, Paris (France).

http://www.logilab.com   http://www.logilab.fr  http://www.logilab.org




From francis.girard at free.fr  Tue Feb  1 15:13:24 2005
From: francis.girard at free.fr (Francis Girard)
Date: Tue, 1 Feb 2005 21:13:24 +0100
Subject: Next step after pychecker
In-Reply-To: <369mivF4ubv6mU1@individual.net>
References: <41ff0308$0$6503$636a15ce@news.free.fr>
	<cto5b9$hpi$1@swifty.westend.com> <369mivF4ubv6mU1@individual.net>
Message-ID: <200502012113.26393.francis.girard@free.fr>

Hi,

I do not want to discourage Philippe Fremy but I think that this would be very 
very difficult to do without modifying Python itself.

What FP languages rely upon to achieve type inference is a feature named 
"strong typing". A clear definition of strong typing is :

"Every well-formed expression of the language can be assigned a type that can 
be deduced from the constituents of the expression alone." Bird and Wadler, 
Introduction to Functional Programming, 1988

This is certainly not the case for Python since one and the same variable can 
have different types depending upon the execution context. Example :

1- if a is None:
2-   b = 1
3- else:
4-   b = "Phew"
5- b = b + 1

One cannot statically determine the type of b by examining the line 5- alone.

Therefore, Fremy's dream can very well turn to some very complex expert system 
to make "educated" warning. Being "educated" is a lot harder than to be 
"brutal".

It's funny that what mainly prevents us from easily doing a type inferencer is 
at this very moment discussed with almost religious flame in the "variable 
declaration" thread.

Anyway, strong typing as defined above would change the Python language in 
some of its fundamental design. It would certainly be valuable to attempt the 
experience, and rename the new language (mangoose would be a pretty name).

Francis Girard
FRANCE

Le mardi 1 F?vrier 2005 16:49, Diez B. Roggisch a ?crit?:
> > But it can be useful to restrict type variety in certain situations
> > e.g. prime number calculation :) And it would probably also be useful
> > to check violations of restrictions before running the program in
> > normal mode.
>
> But that's what (oca)ml and the like do - they exactly don't force you to
> specify a type, but a variable has an also variable type, that gets
> inferned upon the usage and is then fixed.
>
> --
> Regards,
>
> Diez B. Roggisch



From tchur at optushome.com.au  Tue Feb 15 23:32:33 2005
From: tchur at optushome.com.au (Tim Churches)
Date: Wed, 16 Feb 2005 15:32:33 +1100
Subject: SHA1 broken
Message-ID: <200502160432.j1G4WXLQ018139@mail27.syd.optusnet.com.au>

An embedded and charset-unspecified text was scrubbed...
Name: not available
URL: <http://mail.python.org/pipermail/python-list/attachments/20050216/18001326/attachment.ksh>

From grante at visi.com  Tue Feb 22 10:45:01 2005
From: grante at visi.com (Grant Edwards)
Date: 22 Feb 2005 15:45:01 GMT
Subject: imaplib.error: command COPY illegal in state AUTH
References: <1109071449.141166.165710@l41g2000cwc.googlegroups.com>
Message-ID: <421b537d$0$46552$a1866201@visi.com>

On 2005-02-22, Raghul <raghulj at gmail.com> wrote:

> I am getting this error while copying n number of messages to the
> folder using imaplib.What to do to copy n number of folders in mail
>
>  The error i got is
>
> imaplib.error: command COPY illegal in state AUTH

That means you haven't logged in yet.

Will you PLEASE keep your IMAP questions in a single thread?

-- 
Grant Edwards                   grante             Yow!  PARDON me, am I
                                  at               speaking ENGLISH?
                               visi.com            


From eugene at boardkulture.com  Fri Feb  4 13:31:18 2005
From: eugene at boardkulture.com (EuGeNe)
Date: Fri, 04 Feb 2005 19:31:18 +0100
Subject: bicyclerepairman python24 windows idle :(
Message-ID: <cu0f45$knq$1@aphrodite.grec.isp.9tel.net>

Hi there,

I am no expert but wanted to give bicyclerepairman 0.9 a go just to see 
what a refactoring browser is and does. Followed every step of the 
install, I think, but idle doesn't start with the RepairMan section in 
config-extensions.def ... is it incompatible with 2.4?

Thanks for your help.

-- 
EuGeNe

[----
www.boardkulture.com
www.actiphot.com
www.xsbar.com
----]


From dima at trit.invalid  Mon Feb 28 17:58:25 2005
From: dima at trit.invalid (Dima Dorfman)
Date: 28 Feb 2005 22:58:25 GMT
Subject: My C module crashes
References: <mailman.3139.1109606120.22381.python-list@python.org>
Message-ID: <slrnd278gh.2i8s.dima@beaver.trit.org>

On 2005-02-28, Egil Moeller <redhog at takeit.se> wrote:
> I've written a C-module for Python, and it works as intended, but
> obviously does something wrong with its memmory management (refference
> counting), as it causes Python to segfault now and then (randomly,
> whey :S)

Have you tried compiling Python and your module with debugging
enabled? It might make the crash less random--or it might not help at
all, but it's probably worth a try. Running Python with debugging
enabled is a good idea anyway when developing extension modules.


From fumanchu at amor.org  Mon Feb  7 11:50:05 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Mon, 7 Feb 2005 08:50:05 -0800
Subject: Making dynamic data available via ODBC with Python
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E339837B@exchange.hqamor.amorhq.net>

Erwin S. Andreasen wrote:
> I have a Python application server that manages several different data
> sets, permits various reports to be run on them and the data to be
> downloaded as tab-delimetered files, all via a web interface.
> 
> I'd like to explore the possibilities of making the data directly
> available in Windows applications (such as Excel, where it would very
> nice to directly do pivot tables from the live data) via ODBC.

Hi, Erwin,

I give my users Excel documents within a web app. They perform a query
to get the subset of data they want to play with, then see that in an
HTML table, with a link to "get it in Excel format". [If the dataset is
huge, they're prompted to preview only, say, the first 10 rows.] When
they request the Excel format, they get the same data (the HTML table!),
with a Content-type of "application/vnd.ms-excel" and no frills; both IE
and Firefox will use Excel to open it. Works wonderfully. Let me know if
you need more details.


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org


From francis.girard at free.fr  Thu Feb 10 13:28:49 2005
From: francis.girard at free.fr (Francis Girard)
Date: Thu, 10 Feb 2005 19:28:49 +0100
Subject: A great Alan Kay quote
In-Reply-To: <420ab9c9$1@nntp0.pdx.net>
References: <420a5c1e$0$21630$a1866201@visi.com>
	<mailman.2270.1107980587.22381.python-list@python.org>
	<420ab9c9$1@nntp0.pdx.net>
Message-ID: <200502101928.50502.francis.girard@free.fr>

Thank you.

Francis Girard

Le jeudi 10 F?vrier 2005 02:48, Scott David Daniels a ?crit?:
> Francis Girard wrote:
> > ...
> > It's also interesting to see GUIs with windows, mouse (etc.), which
> > apparently find their origin in is mind, probably comes from the desire
> > to introduce computers to children.
>
> OK, presuming "origin in is mind" was meant to say "origin in his mind,"
> I'd like to stick up for Doug Engelbart (holds the patent on the mouse)
> here.  I interviewed with his group at SRI in the ancient past, when
> they were working on the "Augmentation Research" project -- machine
> augmentation of human intelligence.  They, at the time, were working on
> input pointing devices and hadn't yet settled.  The helmet that read
> brain waves was doing astoundingly well (90% correct on up, down, left,
> right, don't move), but nowhere near well enough to use for positioning
> on edits.  This work produced the mouse, despite rumors of Xerox Parc or
> Apple inventing the mouse.
>
> Xerox Parc, did, as far as I understand, do the early development on
> interactive graphic display using a mouse for positioning on a
> graphics screen.  Engelbart's mouse navigated on a standard 80x24
> character screen.
>
> Augment did real research on what might work, with efforts to measure
> ease of use and reliability.  They did not simply start with a good
> (or great) guess and charge forward.  They produced the mouse, and the
> earliest "linked" documents that I know of.
>
>      http://sloan.stanford.edu/MouseSite/1968Demo.html
>
> --Scott David Daniels
> Scott.Daniels at Acm.Org



From tchur at optushome.com.au  Thu Feb  3 21:42:15 2005
From: tchur at optushome.com.au (Tim Churches)
Date: Fri, 04 Feb 2005 13:42:15 +1100
Subject: [Fwd: [gnu.org #220719] Re: python and gpl]
Message-ID: <200502040242.j142gFUr023786@mail09.syd.optusnet.com.au>

An embedded and charset-unspecified text was scrubbed...
Name: not available
URL: <http://mail.python.org/pipermail/python-list/attachments/20050204/e2ef2f6d/attachment.ksh>

From devries at idolstarastronomer.com  Sat Feb 12 22:27:49 2005
From: devries at idolstarastronomer.com (Christopher De Vries)
Date: Sat, 12 Feb 2005 22:27:49 -0500
Subject: SCons build tool speed
In-Reply-To: <SBsPd.4406$ZZ.3056@newssvr23.news.prodigy.net>
References: <SBsPd.4406$ZZ.3056@newssvr23.news.prodigy.net>
Message-ID: <20050213032749.GA15612@miyu.cjas.org>

On Sat, Feb 12, 2005 at 07:16:02PM +0000, ted wrote:
> How does the speed of the Scons build tool compare with Ant? 

I would recommend asking this question on users at scons.tigris.org , but my
impressions is that most of the time is probably spent in the compiler. If you
are working on a java project you could try switching from javac to jikes and
that might improve your time, though it has been a while since I used jikes.

Chris


From das69 at et.byu.edu  Wed Feb  2 15:59:12 2005
From: das69 at et.byu.edu (Dan Smyth)
Date: Wed, 2 Feb 2005 13:59:12 -0700
Subject: Compilation problems for Python 2.4 on SGI machines
Message-ID: <003901c5096a$0c24aa40$6671080a@et.byu.edu>

Hey,

I'm trying to compile python 2.4 on an SGI machine running IRIX 6.5.  The configure program shot back this error and told me to post it to the Python lists.  Anyone know what's going on?

configure: WARNING: stropts.h: present but cannot be compiled
configure: WARNING: stropts.h:     check for missing prerequisite headers?
configure: WARNING: stropts.h: see the Autoconf documentation
configure: WARNING: stropts.h:     section "Present But Cannot Be Compiled"
configure: WARNING: stropts.h: proceeding with the preprocessor's result
configure: WARNING: stropts.h: in the future, the compiler will take precedence
configure: WARNING:     ## --------------------------------- ##
configure: WARNING:     ## Report this to the python lists.  ##
configure: WARNING:     ## --------------------------------- ##

Dan Smyth

Dan Gaidin -- Tai Shar Phoenix
"Dovie'andi se tovya sagain"
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From jerf at jerf.org  Wed Feb  9 18:59:17 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Wed, 09 Feb 2005 18:59:17 -0500
Subject: A great Alan Kay quote
References: <420a5c1e$0$21630$a1866201@visi.com>
	<1107993430.712644.298500@f14g2000cwb.googlegroups.com>
Message-ID: <pan.2005.02.09.23.59.17.304554@jerf.org>

On Wed, 09 Feb 2005 15:57:10 -0800, has wrote:
> I'd say Python is somewhere in the middle, though moving slowly towards
> 'agglutination' in the last couple years.

But it feels really badly about that and promises to kick the habit
somewhere around the year 3000.


From kentsin at yahoo.com  Mon Feb 14 20:07:41 2005
From: kentsin at yahoo.com (kent sin)
Date: Mon, 14 Feb 2005 17:07:41 -0800 (PST)
Subject: Write Unicode str as utf-8
Message-ID: <20050215010741.54218.qmail@web40521.mail.yahoo.com>

Python support unicode, but some library don't. Write
is one of them. 

When writing a csv file, The rows contains numbers and
unicode str. It is a little pain to first convert all
unicode str to utf-8 before writing the row.

Are there anyway I can patch python such that It will
convert the unicode string to utf-8 before the write?
Where should I start?


Best rgs,

Kent Sin


From deetsNOSPAM at web.de  Thu Feb  3 10:56:05 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Thu, 03 Feb 2005 16:56:05 +0100
Subject: Calling a method using an argument
References: <ctth3v$o2r$1@ucsnew1.ncl.ac.uk>
Message-ID: <36evn2F51nullU1@individual.net>

def test(self,arg):
    return getattr(self, arg)

-- 
Regards,

Diez B. Roggisch


From jkjone2002 at att.net  Tue Feb 15 22:33:15 2005
From: jkjone2002 at att.net (john san)
Date: Tue, 15 Feb 2005 22:33:15 -0500
Subject: [newbie]How to install python under DOS and is there any Wxpython
	can be installed under dos?
Message-ID: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>

How to install python under DOS and is there any Wxpython-like can be
installed under dos?

Thanks.




From lbates at syscononline.com  Wed Feb  2 19:26:35 2005
From: lbates at syscononline.com (Larry Bates)
Date: Wed, 02 Feb 2005 18:26:35 -0600
Subject: global variables
In-Reply-To: <1107385488.822768.317250@l41g2000cwc.googlegroups.com>
References: <1107385488.822768.317250@l41g2000cwc.googlegroups.com>
Message-ID: <47WdnSbgo8ku8pzfRVn-ug@comcast.com>

One way to to this is by using keyword args:

class a:
     def __init__(self, arg1, arg2, **kwargs):
         #
         # Dictionary kwargs will have keyword, value pairs
         # that can be used as global space.
         #
         self.arg1=arg1
         self.arg2=arg2
         self.__dict__.update(kwargs)
         return

class b:
     def __init__(self, arg1, arg2, **kwargs):
         #
         # Dictionary kwargs will have keyword, value pairs
         # that can be used as global space.
         #
         self.__dict__.update(kwargs)
         self.a=a(arg1, arg2, **kwargs)
         return

class c:
     def __init__(self, arg1, arg2, **kwargs):
         #
         # Dictionary kwargs will have keyword, value pairs
         # that can be used as global space.
         #
         self.__dict__.update(kwargs)
         self.b=b(arg1, arg2, **kwargs)
         return

globals={'global1':1, 'global2':2, 'global3':3, 'global4':4}
C=c(1, 2, **globals)

you will have global1, global2, global3, and global4 attributs
in all classes.  If you don't want the attributes, just access
to the values, delete the self.__dict__.update(kwargs) lines.

Larry Bates

alex wrote:
> Hi,
> 
> is it possible to create 'global' variables that can be seen in all
> other classes?
> 
> Alex
> 


From ilias at lazaridis.com  Mon Feb 14 04:53:30 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Mon, 14 Feb 2005 11:53:30 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2513.1108365601.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<mailman.2513.1108365601.22381.python-list@python.org>
Message-ID: <cupseo$ar6$1@usenet.otenet.gr>

Miki Tebeka wrote:
> Hello Ilias,
> 
>>d) Is it really neccessary that I dive into such adventures, to be able 
>>to do the most natural thing like: "developing python extensions with 
>>MinGW"?
> 
> Writing a setup.py and running 
>     python setup.py build_ext --compiler=mingw32
> works for me *without* any more work. Things can't get much simpler.

looks really simple.

-

but:

the central problem still exists:

"** For a Python which was built with Cygwin, all should work without 
any of these following steps. **"
source:
http://www.python.org/doc/2.2.3/inst/non-ms-compilers.html#SECTION000312000000000000000

-

"the problem is that Python binary distributions for MS Windows do not 
include import libraries for popular gcc based tools: cygwin and mingw32"
source: http://www.zope.org/Members/als/tips/win32_mingw_modules

-

the solutions is possibly (copied from another answer):

"The Python Foundation could create an official sub-project to create an 
automated build target based on the MinGW toolchain. I am sure that many 
community members would be more than happy to contribute."

.

-- 
http://lazaridis.com


From lith.usenet at gmail.com  Fri Feb 18 02:28:00 2005
From: lith.usenet at gmail.com (Lith)
Date: 17 Feb 2005 23:28:00 -0800
Subject: IDLE edit windows ignores tab settings
Message-ID: <1108711680.377953.287080@f14g2000cwb.googlegroups.com>

[Python/IDLE newbie here]

I created a .py file in UltraEdit and saved it. I use (and always will,
despite the FAQ's recommendation against it) tabs instead of spaces,
set to 4 spaces per tab.

When I open the file in IDLE, suddenly the tabs are 8 spaces wide. This
is despite the fact that I've gone to
Options menu > Configure IDLE... > Fonts/Tabs
and set it thusly:
    Tab key inserts tabs
    indent width 4

Is this a bug, or am I missing something?

I'll now go google to see who to blame for the original 8-space tab.



From joele at qalabs.com  Thu Feb  3 14:16:59 2005
From: joele at qalabs.com (Joel Eusebio)
Date: Thu, 3 Feb 2005 11:16:59 -0800
Subject: errors 
In-Reply-To: <ImoMd.18469$8H2.2826@twister.nyroc.rr.com>
Message-ID: <20050203191700.9483A1E4004@bag.python.org>

Tried looking for the misspelled oldmtime on apache.py but can't find it.

Joel


-----Original Message-----
From: python-list-bounces+joele=qalabs.com at python.org
[mailto:python-list-bounces+joele=qalabs.com at python.org] On Behalf Of Kartic
Sent: Thursday, February 03, 2005 4:00 AM
To: python-list at python.org
Subject: Re: errors 

Joel Eusebio said the following on 2/2/2005 4:53 PM:
> Can someone help me on this, I don' know where the "testmptest" came from
> but the mptest.py is at the /usr/local/apache2/htdocs/test directory and
> this error came from apache's error_log
> 
> PythonHandler mod_python.publisher: ImportError: No module named
testmptest
> 
> Thanks,
> 
> Joel

I found this link from Googling -
http://www.modpython.org/pipermail/mod_python/2004-January/014857.html

Please read the entire thread and see if it provides your resolutions 
(the mod_python OP's issue was similar but for a different module).

It might also do you some good to join mod_python mailing list if you 
are going to use it regularly.

Thanks,
-Kartic
-- 
http://mail.python.org/mailman/listinfo/python-list

-- 
No virus found in this incoming message.
Checked by AVG Anti-Virus.
Version: 7.0.300 / Virus Database: 265.8.5 - Release Date: 2/3/2005
 

-- 
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.300 / Virus Database: 265.8.5 - Release Date: 2/3/2005
 



From wade_stoddard at yahoo.com  Tue Feb 22 03:51:43 2005
From: wade_stoddard at yahoo.com (Igorati)
Date: Tue, 22 Feb 2005 03:51:43 -0500
Subject: NOOB coding help....
References: <69012ed09e48920e1e80e311bca1659c@localhost.talkaboutprogramming.com>
	<sKGdnSm3e5NyK4ffRVn-2g@comcast.com>
Message-ID: <03f8baafb2634534c398d3ddcc476158@localhost.talkaboutprogramming.com>

#This program will ask for a user to imput numbers. The numbers will then
be calculated
#to find the statistical mean, mode, and median. Finallly the user will be
asked
#if he would like to print out the answers.
numbers = [ ] 
print 'Enter numbers to add to the list. (Enter 0 to quit.)'
def getint():
     return int(raw_input('Number? '))

numbers = sorted(iter(getint, 0))

numbers
[2, 3, 5, 7]
def variable_median(x):
     
     return sorted(x)[len(x)//2]
def variable_mode(x):
     
     counts = {}
     for item in x:
         counts[x] = counts.get(x, 0) + 1
     
     return sorted(counts, key=counts.__getitem__, reverse=True)[0]



s = variableMean(numbers)
y = variableMedian(numbers)
t = variableMode (numbers)

import pickle
pickle.dump((s, y, t), file('avg.pickle', 'w'))


print 'Thank you! Would you like to see the results after calculating'
print 'The mode, median, and mean? (Please enter Yes or No)'
print 'Please enter Yes or No:'


if raw_input == yes:

    f = open("avg.py","r")
    avg.py = f.read()
    print 'The Mean average is:', mean
    print 'The Median is:', meadian
    print 'The Mode is:', mode


I got the error:

Traceback (most recent call last):
  File "C:\Python24\Lib\New Folder\Wade_StoddardSLP3-2.py", line 9, in ?
    numbers = sorted(iter(getint, 0))
  File "C:\Python24\Lib\New Folder\Wade_StoddardSLP3-2.py", line 7, in
getint
    return int(raw_input('Number? '))
TypeError: 'str' object is not callable

and this one for my if statement:

Traceback (most recent call last):
  File "C:\Python24\Lib\New Folder\Wade_StoddardSLP3-2.py", line 39, in ?
    if raw_input == Yes:
NameError: name 'Yes' is not defined

I cannot understand how I can define yes so that when they type yes the
data is printed out. Also if they type no how do I make the program do
nothing. Or is that just infered.





From mk at interzone.gr  Mon Feb 28 02:52:57 2005
From: mk at interzone.gr (Michalis Kabrianis)
Date: Mon, 28 Feb 2005 09:52:57 +0200
Subject: wxGrid
In-Reply-To: <1109574065.613518.241750@l41g2000cwc.googlegroups.com>
References: <1109574065.613518.241750@l41g2000cwc.googlegroups.com>
Message-ID: <cvuiae$oer$1@nic.grnet.gr>

Gensek wrote:
> I have a grid. I want to sort it when a column label is clicked. I know
> about the EVT_GRID_LABEL_LEFT_DCLICK event, but that is not enough. I
> do not merely need to know that a label was clicked. I need to know
> which label was clicked. I do not know how to do that. I suspect you
> might know. I request that you tell me.
> 
> I also wish to know some other things: how to find out the location of
> a mouse pointer in a wxWindow (or at least the frame), and how to
> change the color of a single specified pixel in a bitmap.
> 
> I use Python 2.3, wxPython 2.4.2.
> 

Hi,
In C++, you can use event.GetColumn() to get that info.
Look at wxGridEvent.
If I were you, I would try to see if these functions are also available 
on wxPython

Michalis


From fredrik at pythonware.com  Mon Feb 14 18:25:54 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 15 Feb 2005 00:25:54 +0100
Subject: Inheritance error in python 2.3.4???
References: <1108422852.332215.165790@o13g2000cwo.googlegroups.com>
Message-ID: <curbt0$h52$1@sea.gmane.org>

friedmud at gmail.com wrote:

> In trying to construct a good object model in a recent project of mine,
> I ran across the following peculiarity in python 2.3.4 (haven't tried
> any newer versions):
>
> Say you have a base class that has an attribute and an accessor
> function for that attribute (just a simple get).

(don't use getters and setters methods in Python; use bare attributes where
you can, and properties when you need to add logic)

> BUT!  If you implement the get function in the derived class it works
> fine....
>
> This, to me, is completely wrong.

it works exactly as documented.

> I have worked up the following example to illustrate my point:
>
> First is the way I want to do it:
> ######################################
> bash-2.05b$ cat main.py
> class baseClass(object):
>        __Something = "Dumb!"
>
>        def getSomething( self ):
>                return self.__Something
>
> class subClass(baseClass):
>        def setSomething( self , aSomething ):
>                self.__Something = aSomething
>
> anObject = subClass()
> anObject.setSomething("Cool!")
> print anObject.getSomething()
>
> bash-2.05b$ python main.py
> Dumb!
> ###################################
>
> Note that it prints "Dumb!" instead of "Cool!".

members that start with __ (two underscores) are private to the class, so
you're in fact working with two different attributes here.

see section 9.6 in the tutorial for more on this:

http://docs.python.org/tut/node11.html#SECTION0011600000000000000000

to fix your problem, rename the attribute.

</F> 





From snail at objmedia.demon.co.uk  Mon Feb 14 09:47:06 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Mon, 14 Feb 2005 14:47:06 +0000
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr>
Message-ID: <XX+64LRqnLECFwAV@objmedia.demon.co.uk>

In message <cuq084$r99$1 at usenet.otenet.gr>, Ilias Lazaridis 
<ilias at lazaridis.com> writes
>> The answer to most of your questions is, "Because no one has yet 
>>volunteered their time and effort to get the job done."
>
>this answer do not fit in most questions.
>
>please review them again.

There you go. Failed the test. He is an AI. A human wouldn't make this 
mistake.

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From EP at zomething.com  Fri Feb  4 03:08:52 2005
From: EP at zomething.com (EP)
Date: Fri, 4 Feb 2005 00:08:52 -0800
Subject: OT: why are LAMP sites slow?
In-Reply-To: <280bd2-1ad.ln1@eskimo.tundraware.com>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<mailman.1857.1107479377.22381.python-list@python.org>
	<7xis59qgaz.fsf@ruckus.brouhaha.com>
	<280bd2-1ad.ln1@eskimo.tundraware.com>
Message-ID: <20050204000852.1247266681.EP@zomething.com>


> > The server is slow to respond to requests.  Browser rendering is
> > independent of the server architecture and "slow to be fetched from
> > the server" sounds like it means low network speed.  I'm talking 
> about
> > the very familiar experience of clicking a link and then waiting,
> > waiting, waiting for the page to load.  You rarely see that happen
> > with Ebay or Google.  It happens all the time with Wikipedia.
> 
> This has a lot to do with the latency and speed of the connecting
> network. Sites like Ebay, Google, and Amazon are connected
> to internet backbone nodes (for speed) and are cached throughout
> the network using things like Akami (to reduce latency)...


Akami for services, or better yet, cacheing hardware such as NetCache.  Frequently requested data doesn't even have to come from the server disks/database - it's sent from the NetCache.



From tim.peters at gmail.com  Sat Feb 26 13:05:12 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Sat, 26 Feb 2005 13:05:12 -0500
Subject: Whither datetime.date ?
In-Reply-To: <pcomztr9pad.fsf@shuttle.math.ntnu.no>
References: <pcomztr9pad.fsf@shuttle.math.ntnu.no>
Message-ID: <1f7befae05022610052cd56cb4@mail.gmail.com>

[Harald Hanche-Olsen]
> I'm confused.  I was going to try linkchecker, and it dies with a
> traceback ending in
>
>  File "/usr/local/lib/python2.4/calendar.py", line 32, in _localized_month
>    _months = [datetime.date(2001, i+1, 1).strftime for i in range(12)]
> AttributeError: 'module' object has no attribute 'date'
>
> Sure enough, there is no datetime.date, but there is a datetime.Date:
>
> Python 2.4 (#2, Feb 19 2005, 20:35:23)
> [GCC 3.4.2 [FreeBSD] 20040728] on freebsd5
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import datetime
> >>> dir(datetime)
> ['Date', 'DateTime', ...]
> 
> However, the Library Reference clearly states that datetime.date
> should exist.  Granted, it's been a while since I used python in
> anger, but isn't this what it says?
> 
>  http://www.python.org/doc/2.4/lib/node243.html
>  http://www.python.org/doc/2.4/lib/datetime-date.html
>
> Moreover, the datetime.date class is supposed to have a strftime()
> method.  datetime.Date does not.
>
> I'm beginning to wonder if the FreeBSD python package is at fault.
>
> Or what is really going on here?

As you've deduced, you're certainly not getting Python's builtin
datetime module.  Therefore you must be getting some other datetime
module.  Run Python with the "-v" switch to get output telling you how
imports are resolved.  That will show you where this other datetime
module is coming from.  Remember that Python searches along sys.path
to resolve imports, taking the first thing it finds with the right
name.  You almost certainly have something _called_ datetime earlier
in your PYTHONPATH than where the standard Python libraries appear.


From miki.tebeka at Zoran.com  Thu Feb 17 03:46:44 2005
From: miki.tebeka at Zoran.com (Miki Tebeka)
Date: Thu, 17 Feb 2005 10:46:44 +0200
Subject: Help with C extensions under VC6 / WinXP and Python 2.4
In-Reply-To: <1108619503.324262.282330@c13g2000cwb.googlegroups.com>
References: <mailman.2731.1108605453.22381.python-list@python.org>
	<s30811dnlp51u3t1td3s6q0efp7b3m2ma0@4ax.com>
	<mailman.2732.1108608361.22381.python-list@python.org>
	<1108619503.324262.282330@c13g2000cwb.googlegroups.com>
Message-ID: <20050217084642.GC4000@zoran.com>

Hello Simon,

> What's the difference between ctypes, SWIG and SIP?
SIG and SIP take C/C++ *sources* and create Python modules. ctypes works
directly with the binary dll.

Bye.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys


From rkern at ucsd.edu  Tue Feb  1 20:03:25 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Tue, 01 Feb 2005 17:03:25 -0800
Subject: Atlas and NumPy Problems
In-Reply-To: <mailman.1715.1107298278.22381.python-list@python.org>
References: <mailman.1715.1107298278.22381.python-list@python.org>
Message-ID: <ctp8ss$mls$1@news1.ucsd.edu>

Justin Lemkul wrote:
> Hello all,
> 
> I am hoping someone out there will be able to help me.  I am trying to install 
> a program that utilizes NumPy.  In installing NumPy, I realized that I was 
> lacking Atlas.  I ran into the following problems installing Atlas and NumPy, 
> as I realized that NumPy could be installed using the Mac OSX veclib already 
> built in.  If anyone has any ideas on how to fix either of these, I would be 
> most grateful.
> 
> I am fairly new to Python (I've been learning it myself), so I apologize if 
> these questions are a bit foolish.  I've been fighting these problems for 
> days, and I'm out of ideas.
> 
> I am running OS X v10.3, gcc v3.3, Python v2.3, ScientificPython v2.4.3, and 
> am attempting to install NumPy 23.7

Did you try to follow my advice from the other thread? What does your 
setup.py look like?

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From dontwant at spam.com  Sun Feb 13 19:04:24 2005
From: dontwant at spam.com (Courageous)
Date: Sun, 13 Feb 2005 16:04:24 -0800
Subject: Kill GIL
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<cum62t$3fb$1@panix2.panix.com>
	<mailman.2463.1108256227.22381.python-list@python.org>
	<868y5t6sal.fsf@guru.mired.org> <cumoue$9ur$1@panix2.panix.com>
	<86sm405d38.fsf@guru.mired.org>
Message-ID: <0lqv01tvnh23n80qcops33uhnumtbtb9t8@4ax.com>


>Actually, this is one of the cases I was talking about. I find it
>saner to convert to non-blocking I/O and use select() for
>synchronization. That solves the problem, without introducing any of
>the headaches related to shared access and locking that come with
>threads.

Threads aren't always the right entity for dealing with asynchronicity,
one might say.

C//



From miki.tebeka at zoran.com  Wed Feb  2 11:30:13 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Wed, 2 Feb 2005 18:30:13 +0200
Subject: CONTEST - What is the (best) solution?
In-Reply-To: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
References: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
Message-ID: <20050202162949.GI2416@zoran.com>

Hello Lad,

> In a file there can be several dictionaries like this
> {Key11: Value11
> Key12: Value12
> Key13: Value13,
> ...
> ...
> Key1n:Value1n}
> {Key21: Value21
> Key22: Value22
> Key23: Value23,
> ...
> ...
> Key2n:Value2n}
> {Key31: Value31
> Key32: Value32
> Key33: Value33,
> ...
> ...
> Key3n:Value3n}
> ....
> ....
> ....
> {Keyn1: Valuen1
> Keyn2: Valuen2
> Keyn3: Value3,
> ...
> ...
> Keynn:Valuenn}
> 
> Each pair in a dictionary is separated by CRLF and in each dictionary
> numbers of pairs can be different.
> I need to read only the the first and the last dictionaries.What is a
> best solution?

---- d.py ---

#!/usr/bin/env python

from sys import argv

dicts = eval("[" + open(argv[1]).read().replace("}", "},") + "]")
print dicts[0], dicts[-1]

---- d.py ---

HTH.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys



From just at xs4all.nl  Thu Feb  3 09:37:43 2005
From: just at xs4all.nl (Just)
Date: Thu, 03 Feb 2005 15:37:43 +0100
Subject: Hey, get this!
References: <mailman.1509.1106923923.22381.python-list@python.org>
	<ctdlpq$ukf$00$1@news.t-online.com>
	<k%WKd.98003$Jk5.87621@lakeread01> <4200E5CB.6020508@holdenweb.com>
	<s9z4qgvrpaj.fsf@salmakis.intevation.de>
	<s9zr7jx213w.fsf@salmakis.intevation.de>
Message-ID: <just-9045B1.15374303022005@news1.news.xs4all.nl>

In article <s9zr7jx213w.fsf at salmakis.intevation.de>,
 Bernhard Herzog <bh at intevation.de> wrote:

> Bernhard Herzog <bh at intevation.de> writes:
> 
> > Steve Holden <steve at holdenweb.com> writes:
> >>          if package:
> >>              module.__path__ = sys.path
> >
> > You usually should initialize a package's __path__ to an empty list.
> 
> Actually, normally it's a list that contains the name of the package
> directory as its only item.  I'm not sure what you should do when you do
> not import from a file system.

If it's a path importer, it could be a cookie, specific to the importer. 
I think in Steve's case initializing __path__ to ["*db*"] should work.

Just


From martin at v.loewis.de  Fri Feb 11 19:28:10 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 12 Feb 2005 01:28:10 +0100
Subject: sre is broken in SuSE 9.2
In-Reply-To: <1108060527.378911.146240@o13g2000cwo.googlegroups.com>
References: <mailman.2299.1108029731.22381.python-list@python.org>
	<1108060527.378911.146240@o13g2000cwo.googlegroups.com>
Message-ID: <420D4D9A.40201@v.loewis.de>

Serge Orlov wrote:
  > To summarize the discussion: either it's a bug in glibc or there is an
> option to specify modern POSIX locale. POSIX locale consist of
> characters from the portable character set, unicode is certainly
> portable. 

Yes, but U+00E4 is not in the portable character set. The portable
character set is defined here:

http://www.opengroup.org/onlinepubs/007908799/xbd/charset.html

Regards,
Martin


From mirandacascade at yahoo.com  Mon Feb 14 10:52:23 2005
From: mirandacascade at yahoo.com (mirandacascade at yahoo.com)
Date: 14 Feb 2005 07:52:23 -0800
Subject: newbie question - identifying name of method
Message-ID: <1108396343.218224.79980@c13g2000cwb.googlegroups.com>

Does Python provide some sort of mechanism for answering the question:
what method am I in?

Example: assume the file example1.py contains the following code:

def driver():
    print 'hello world'
    print __name__
    print 'the name of this method is %s' % str(???)

The output I'd like to see is:

hello world
example1
driver

and I'd like to be able to see it without hardcoding the string
'driver' in the third print statement.  Is there anything I can
substitute for the ??? that answers the question: what method am I in?



From peter at engcorp.com  Sun Feb 13 20:51:45 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sun, 13 Feb 2005 20:51:45 -0500
Subject: For American numbers
In-Reply-To: <zzJPd.47429$Z14.33326@news.indigo.ie>
References: <420e7376$1@nntp0.pdx.net> <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
	<zzJPd.47429$Z14.33326@news.indigo.ie>
Message-ID: <0omdnfYNUY4zmY3fRVn-rA@powergate.ca>

Alan Kennedy wrote:
> [Peter Hansen]
>> For the rest of the computer world, unless I've missed
>> a changing of the guard or something, "kilo" is 1024
>> and "mega" is 1024*1024 and so forth...
> 
> Maybe you missed these?
> 
> http://en.wikipedia.org/wiki/Kibibyte
> http://en.wikipedia.org/wiki/Mebibyte
> http://en.wikipedia.org/wiki/Gibibyte

Definitely missed them, in the sense of "didn't see them
yet".  I must say I'm somewhat astounded that anyone
bothered to do this.

Don't miss them at all, in the sense of "have no plans
to use them and am not stressed in the least over the fact
that they are lacking in my life."

> kilo-mega-giga-etc-should-be-powers-of-10-ly y'rs,

Maybe, but they aren't always... that's just the way
it is.

I take a descriptive view rather than a prescriptive one.
Google for the usage of the above and you'll find the
following ratios for the numbers of pages that use
the two forms:

kibibyte vs. kilobyte: 1:60 (impressively high, I admit)
mebibyte vs. megabyte: 1:234
gibibyte vs. gigabyte: 1:2082

I strongly suspect that the vast majority of the former
set of pages are of the form "use this instead of kilo!",
but perhaps I really have been asleep while much of the
computing world converted.

I'll be one of the last holdouts, too...  it's really not
so hard to work in powers of two if you try...

-Peter


From jerf at jerf.org  Tue Feb  8 07:47:02 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 08 Feb 2005 07:47:02 -0500
Subject: turing machine in an LC (was: Xah Lee's stupid question #853,172)
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
	<87mzuf9gu8.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<s9zvf93ovp8.fsf@salmakis.intevation.de>
Message-ID: <pan.2005.02.08.12.47.00.135408@jerf.org>

On Tue, 08 Feb 2005 17:36:19 +0100, Bernhard Herzog wrote:

> Nick Vargish <nav+posts at bandersnatch.org> writes:
> 
>> "Xah Lee" <xah at xahlee.org> writes:
>>
>>> is it possible to write python code without any indentation?
>>
>> Not if Turing-completeness is something you desire.
> 
> It's possible to implement a turing machine with a single list
> comprehension.  No indentation needed.

I had to think about it, it's an interesting, and I'm going to tentatively
disagree, because of the statement/expression dichotomy. "Tentatively"
because if somebody can answer these objections than I will happily change
my mind :-)

I can't figure out how to write a TM in a Python List Comprehension
without one of either "variable binding" (so we can store the last symbol
list and manipulate it in the next iteration) or "recursive function" (to
express the whole tape as a recursive function), both of which require
statements. I can figure out how to write a single state transition, but
in a single LC I can't figure out how to feed the new state into the next
iteration; the previous values generated in the LC are, to my knowledge,
not accessible to the LC as it is running. (If they are, I *think* that
would indeed be enough.)

I'm sure Haskell could do both, being a functional language, and I am
satisfied that it is probably possible in that language, as long as you
are resigned to creating a wasted list (which may not even matter in
Haskell). But I think you're screwed in Python with an LC.

However, hack hack hack, I think you could do this in Python 2.4 with a
*generator* comprehension and a couple of supporting lines of non-indented
code:

Python 2.4 (#1, Jan  2 2005, 22:17:50) 
[GCC 3.4.3  (Gentoo Linux 3.4.3, ssp-3.4.3-0, pie-8.7.6.6)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> this = sys.modules[__name__]
>>> magicGenerator = (getattr(this, "results")[-1] + 1 for x in range(5))
>>> results = [0] # you have to prime the state here
>>> results.extend(magicGenerator)
>>> results
[0, 1, 2, 3, 4, 5]
>>> 

Now you *can* get at the previous state and write a state-transition
expression in perfectly legal Python.

What do you know, generator comprehensions are Turing Complete and list
comprehensions aren't. I wouldn't have expected that.

People caught using this technique in real code will be caught and forced
to code in Intercal for the rest of their lives.


From pink at odahoda.de  Sun Feb 27 12:17:30 2005
From: pink at odahoda.de (Pink)
Date: Sun, 27 Feb 2005 18:17:30 +0100
Subject: Need help running external program
References: <c2nUd.3268977$B07.514197@news.easynews.com>
Message-ID: <cvsvbb$nne$01$1@news.t-online.com>

Rigga wrote:

> Hi,
> 
> I am running the line of code below from a shell script and it works fine,
> however I am at a total loss on how i can run it from within a Python
> script as every option I have tried fails and it appears to be down to the
> escaping of certain characters.
> 
> wget -q www.anywebpage.com -O - | tr '\r' '\n' | tr \' \" | sed -n
> 's/.*url="\([^"]*\)".*/\1/p'
If your problem is getting a python string without worrying about how to
escape the escape sequences, try:

r"""wget -q www.anywebpage.com -O - | tr '\r' '\n' | tr \' \" | sed -n
's/.*url="\([^"]*\)".*/\1/p'"""

You should be able to pass this directly to a popen() function.



From AS at nospam.org  Mon Feb 21 14:06:09 2005
From: AS at nospam.org (Alberto Santini)
Date: Mon, 21 Feb 2005 20:06:09 +0100
Subject: Real-Time Fluid Dynamics for Games...
References: <cv9oum$7og$1@newsreader.mailgate.org>
	<1108915754.064554.62100@z14g2000cwz.googlegroups.com>
Message-ID: <cvdbf6$c07$1@newsreader.mailgate.org>

You can find some screenshot in the Stam's original paper.
I didn't do any serious benchmark. I compared the speed
of C version with the Python one. It seems enough good.

I advice you to download from Stam's site paper and C code,
compile the C code and verify yourself the results.

I think the solver of Navier-Stokes equations is a piece
of cake(remember, it's patented): one page of code or less. :)

I don't like the use of global in the callback functions
of OpenGL.

-- 
Regards,
Alberto Santini


<bearophileHUGS at lycos.com> ha scritto nel messaggio 
news:1108915754.064554.62100 at z14g2000cwz.googlegroups.com...
> Your two email addresses bouce emails back, so I post a shortened
> version of my comment here.
> I haven't installed:
> PyOpenGL-2.0.2.01.py2.4-numpy23
> glut-3.7.6
> Therefore at the moment I cannot try your interesting code.
> What's the speed of this Python code on your computer?
> I'd like to see a screenshoot of the running Python Program...
>
> Some people are doing in Python some things that require lots of
> computations, like:
> http://www.joachim-bauch.de/projects/python/pytrace
>
> Bye,
> Bearophile
> 




From cepl at surfbest.net  Thu Feb 10 16:46:47 2005
From: cepl at surfbest.net (cepl at surfbest.net)
Date: 10 Feb 2005 13:46:47 -0800
Subject: Seekable output from ClientForm?
In-Reply-To: <slrnd0l3sn.ddn.mac@tau.ceti.pl>
References: <35993bcb.0502091338.34591a7@posting.google.com>
	<slrnd0l3sn.ddn.mac@tau.ceti.pl>
Message-ID: <1108072007.643781.95100@f14g2000cwb.googlegroups.com>

Thanks a lot!

Matej



From ajikoe at gmail.com  Fri Feb  4 11:12:20 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 4 Feb 2005 08:12:20 -0800
Subject: Thread in python
Message-ID: <1107533540.641969.191940@z14g2000cwz.googlegroups.com>

Hello, is any one knows websites which give a python thread tutorial ?

Sincerely Yours,
Pujo Aji



From pierre.barbier at cirad.fr  Wed Feb  9 10:18:06 2005
From: pierre.barbier at cirad.fr (Pierre Barbier de Reuille)
Date: Wed, 09 Feb 2005 16:18:06 +0100
Subject: multi threading in multi processor (computer)
In-Reply-To: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
Message-ID: <420a2938$0$22987$626a14ce@news.free.fr>

ajikoe at gmail.com a ?crit :
> Hello,
> 
> Is anyone has experiance in running python code to run multi thread
> parallel in multi processor. Is it possible ?
> 
> Can python manage which cpu shoud do every thread?
> 
> Sincerely Yours,
> Pujo
> 

There's just no way you can use Python in a multi-processor environment, 
because the GIL (Global Interpreter Lock) will prevent two threads from 
running concurrently. When I saw this discussed, the Python developper 
were more into multi-process systems when it comes to multi-processors.
I think I even heard some discussion about efficient inter-process 
messaging system, but I can't remember where :o)

Hope it'll help.

Pierre


From schulz at sunbroy2.informatik.tu-muenchen.de  Wed Feb 16 14:26:49 2005
From: schulz at sunbroy2.informatik.tu-muenchen.de (Stephan Schulz)
Date: Wed, 16 Feb 2005 19:26:49 +0000 (UTC)
Subject: Imported or executed?
References: <slrnd17668.3nr.schulz@sunbroy2.informatik.tu-muenchen.de>
	<mailman.2715.1108581429.22381.python-list@python.org>
Message-ID: <slrnd177f7.3nr.schulz@sunbroy2.informatik.tu-muenchen.de>

In article <mailman.2715.1108581429.22381.python-list at python.org>,
Fredrik Lundh wrote: 
>Stephan Schulz wrote:
>
>> Is there a (portable, standard) way for the program/module to find out
>> if it is imported or executed stand-alone?
>
>if a module is executed, it's name is set to "__main__".  see:
[...]

It works. Thanks!

Bye,

    Stephan

-- 
-------------------------- It can be done! ---------------------------------
   Please email me as schulz at informatik.tu-muenchen.de (Stephan Schulz)
----------------------------------------------------------------------------


From paddy3118 at netscape.net  Sat Feb 19 01:57:06 2005
From: paddy3118 at netscape.net (Paddy)
Date: 18 Feb 2005 22:57:06 -0800
Subject: combining several lambda equations
References: <2ae25c6b.0502180224.3d6164a7@posting.google.com>
	<ALqdnSMoh__WuIvfRVn-vA@comcast.com>
Message-ID: <1108796226.581509.148610@o13g2000cwo.googlegroups.com>

Steve,
Thanks for the info but I do know about that..
What I am doing is taking a set of inputted functions that don't
take arguments and programmatically analysing them and
combining them to create new functions that are further analysed.

During testing I keep the numbers low, and am only dealing with one to
two hundred equations, but real life problems could involve maybe
thousands of them., (and then I'd ptobably shift to using tuples of
ints or tuples of strings as 'handles'  or keys to
my generated functions, to convey more info on how
intermediate functions are generated).

Thanks again for the interest,
-  Paddy.



From peter at engcorp.com  Wed Feb  9 18:40:27 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 09 Feb 2005 18:40:27 -0500
Subject: newbie question
In-Reply-To: <1107992130.921664.68860@z14g2000cwz.googlegroups.com>
References: <1107990182.516041.120410@o13g2000cwo.googlegroups.com>
	<xfOdnUnRLYukB5ffRVn-tA@powergate.ca>
	<1107992130.921664.68860@z14g2000cwz.googlegroups.com>
Message-ID: <2qWdnT0el8ITApffRVn-oA@powergate.ca>

doodle4 at gmail.com wrote:
> Thanks for the reply.
> 
> I am trying to convert some C code to python and i was not sure what
> the equivalent python code would be.
> 
> I want to postdecrement the value in the while loop. Since i cannot use
> assignment in while statements is there any other way to do it in
> python?

Generally in Python you simply put the assignment-based
statement in a "while True:" block, and use "break" to
exit as required.  For example, here is one way to
approach it in this case:

while True:
     n = n - 1
     if n == -1:
         break

Having written the above, however, I'm uncertain whether this
sort of thing is really required in Python.  Although I have
ported very little C code to Python (so I might be wrong), I
definitely have never seen anything resembling the above
pattern in Python code that I or others have written.

My suspicion is that the code involves operations which are
actually better handled in Python by some kind of builtin
or standard library operation.  For example, often the
post-decrementing is part of a pointer operation involving
manipulating a string character-by-character.  This is
effectively never required in Python, and will pretty much
always result in a program written at a much lower level
than what you should be shooting for in Python.  But if
you want a direct port, then the above should do...

-Peter


From ncoghlan at iinet.net.au  Sat Feb  5 21:50:53 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 06 Feb 2005 12:50:53 +1000
Subject: empty classes as c structs?
In-Reply-To: <MIadnXgLYun0hJjfRVn-2Q@comcast.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<7rSdne7BcbDeV57fRVn-jg@comcast.com>	<mailman.1963.1107594941.22381.python-list@python.org>	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>	<mailman.1973.1107618702.22381.python-list@python.org>
	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>
Message-ID: <4205860D.8000908@iinet.net.au>

Steven Bethard wrote:
> Nick Coghlan wrote:
>> I think the idea definitely deserves mention as a possible 
>> implementation strategy in the generic objects PEP, with the data 
>> argument made optional:
> 
> 
> That's basically what the current implementation does (although I use 
> 'update' instead of '=').  The code is complicated because the 
> implementation also takes all the argument types that dicts take.

The main difference I noticed is that by using update, any changes made via the 
attribute view are not reflected in the original dict.

By assigning to __dict__ directly, you can use the attribute view either as it's 
own dictionary (by not supplying one, or supplying a new one), or as a 
convenient way to programmatically modify an existing one. For example, you 
could use it to easily bind globals without needing the 'global' keyword:

Py> class attr_view(object):
...     def __init__(self, data):
...         self.__dict__ = data
...
Py> def f():
...   gbls = attr_view(globals())
...   gbls.x = 5
...
Py> x
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
NameError: name 'x' is not defined
Py> f()
Py> x
5

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From rkern at ucsd.edu  Fri Feb 25 20:57:17 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Fri, 25 Feb 2005 17:57:17 -0800
Subject: weird strings question
In-Reply-To: <ImQTd.7095$Ba3.1886@newsread2.news.atl.earthlink.net>
References: <ImQTd.7095$Ba3.1886@newsread2.news.atl.earthlink.net>
Message-ID: <cvol1v$e1v$1@news1.ucsd.edu>

Lucas Raab wrote:
> Is it possible to assign a string a numerical value?? For example, in 
> the string "test" can I assign a number to each letter as in "t" = 45, 
> "e" =  89, "s" = 54, and so on and so forth??

Use a dictionary with the strings as keys.

string2num = {}
string2num['t'] = 45
string2num['e'] = 89

etc.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From grante at visi.com  Thu Feb 17 11:49:37 2005
From: grante at visi.com (Grant Edwards)
Date: 17 Feb 2005 16:49:37 GMT
Subject: newbie question - iterating through dictionary object
References: <1108656866.128912.109800@f14g2000cwb.googlegroups.com>
Message-ID: <4214cb21$0$44602$a1866201@visi.com>

On 2005-02-17, mirandacascade at yahoo.com <mirandacascade at yahoo.com> wrote:
> 1) Is there any advantage to use the
>
> y = a.keys()
> for z in y:
>
> looping technique rather than the
>
> for x in a:
>
> looping technique?

Not really.

> 2) What are the tradeoffs for using each of the techniques?

"for x in a" can be more efficient since it allows the
dictionary to return key values one at a time instead of
creating a list containing all of them.  For small dictionaries
it won't matter.

Here's another choice, that's sometimes handy:

>>> d = {1:'one',2:'two',3:'three'}
>>> for k,v in d.items():
....  print k,v
.... 
1 one
2 two
3 three
>>> 

I wouldn't recommend this for large dictionaries.

-- 
Grant Edwards                   grante             Yow!  RELATIVES!!
                                  at               
                               visi.com            


From bdesth.quelquechose at free.quelquepart.fr  Tue Feb  8 16:26:09 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 08 Feb 2005 22:26:09 +0100
Subject: Loop in list.
In-Reply-To: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
References: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
Message-ID: <42092c18$0$14115$626a14ce@news.free.fr>

Jim a ?crit :
> Where did this type of structure come from:
> 
> mat = ['a' for i in range(3)]    ?
> 
> This will produce a list of three elements but
> I don't see reference for it in any of the books.
> 
Now everyone told you *what* is it, I'll (very very dumbly) answer the 
question : this syntax comes from Haskell.

HTH !-)
Bruno


From aisaac0 at verizon.net  Fri Feb 11 14:04:49 2005
From: aisaac0 at verizon.net (David Isaac)
Date: Fri, 11 Feb 2005 19:04:49 GMT
Subject: Iteration over two sequences
References: <1gq9qs9.3snutr1s4mcn2N%news+0409@henrikholm.com>
	<1105549514.563799.307030@z14g2000cwz.googlegroups.com>
	<1gq9z5q.1x7si1us4kgmcN%news+0409@henrikholm.com>
	<41e58244$1@nntp0.pdx.net>
Message-ID: <ll7Pd.24923$uc.21731@trnddc09>


"Scott David Daniels" <Scott.Daniels at Acm.Org> wrote in message
news:41e58244$1 at nntp0.pdx.net:
> Numarray is the future, Numeric is the "past",

This statement is not obviously true.
See the recent discussion on the developer lists.
(Search for Numeric3.)
Alan Isaac




From aleaxit at yahoo.com  Mon Feb  7 10:54:09 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 7 Feb 2005 16:54:09 +0100
Subject: Confused with methods
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>
	<slrnd0enor.26q.apardon@rcpc42.vub.ac.be>
	<1grmd4z.1tlm4e61650vedN%aleaxit@yahoo.com>
	<slrnd0f07t.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2074.1107789846.22381.python-list@python.org>
Message-ID: <1grmgxm.11gq1hk2lpcurN%aleaxit@yahoo.com>

John Lenton <john at grulic.org.ar> wrote:

> I think __new__ being an
> exception to this is a (minor) wart, in fact it feels like premature
> optimization (how many __new__s do you write, that you can't stick a
> @staticmethod in front of them?

I personally think it's quite reasonable for Python's infrastructure to
consider each special name specially -- that's what the double
underscores before and after are FOR, after all.  Since __new__ MUST be
a staticmethod, and there's no use case for it ever being otherwise, it
seems quite sensible for the default metaclass to MAKE it a staticmethod
(and otherwise treat it specially, as it needs to be).  I don't see what
optimization has to do with it (quite apart from the fact that __new__
was introduced before the splatsyntax for decorators, so that rather
than sticking anything in front the alternative would have been to
demand serious boilerplate, a '__new__ = staticmethod(__new__)' after
every definition of such a method).  Reducing boilerplate with no ill
effects whatsoever seems quite a worthy goal to me, when reachable.


Alex


From duncan.booth at invalid.invalid  Mon Feb  7 03:57:29 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 7 Feb 2005 08:57:29 GMT
Subject: def __init__ question in a class definition
References: <1107750187.3795.9.camel@batfink.its.adelaide.edu.au>
	<mailman.2052.1107763052.22381.python-list@python.org>
Message-ID: <Xns95F65B1ED8EEEduncanrcpcouk@127.0.0.1>

Miki Tebeka wrote:

>> IE: is there any special significance to the __ in this case.
> http://docs.python.org/tut/tut.html

specifically section 9.6

Also Python Reference Manual, section 2.3.2 Reserved classes of identifiers


From deetsNOSPAM at web.de  Fri Feb 11 16:50:45 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 11 Feb 2005 22:50:45 +0100
Subject: PyQt documentation
References: <1108088253.552834.44690@z14g2000cwz.googlegroups.com>
	<373it0F4uglf9U1@individual.net>
	<1108131643.216301.92510@o13g2000cwo.googlegroups.com>
	<373u0qF58g57fU1@individual.net>
	<1108157806.674018.58490@l41g2000cwc.googlegroups.com>
Message-ID: <cuj9bh$uea$02$1@news.t-online.com>

Eric Jardim wrote:
> *You* may not need. But think about other people. By the way, I found 9
> "I"s on your last message. Don't be that selfish :)

That's right - and it was done to express not my unarguably existing
selfishness, but to strech the fact that it was my opinion that not
necessarily qualifies as being "the one and only" opinion and didn't want
to discourage you too much. Never try to stop volontary workers (at least
not in documentation.. :)

But I'd still hold the impression that your problems might stem from you
wanting to code qt, before done in c++ and just by "accident" in python.
All real nasty problems I ran into appeared when I tried to do things that
are not complementary between python and qt (like the gui stuff) but in the
common subset. My troubles once came from using QThread (made my app
totally crash). QText*Stream plays for me in the same league: python itself
is perfectly capable of reading and writing data to disk/memory/your
wallpaper. So being a pythoneer, it never occured to me to use
QText*Streams :)

No having said that, I totally agree that such information is surely needed
- but I doubt that it really makes sense to create full docs at a api
level. It would be hard to be in sync with the qt development itself. 

Instead a wiki which captures the various pitfalls would be cool. And it
appears it exists:

http://www.diotavelli.net/PyQtWiki

So maybe enhancing that would be an option for you?

-- 
Regards,

Diez B. Roggisch


From irmen.NOSPAM at xs4all.nl  Wed Feb  2 17:27:23 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Wed, 02 Feb 2005 23:27:23 +0100
Subject: Getting a module's byte code, how?
In-Reply-To: <pan.2005.02.02.22.06.22.395829@freelance-developer.com>
References: <42014e25$0$28975$e4fe514c@news.xs4all.nl>
	<pan.2005.02.02.22.06.22.395829@freelance-developer.com>
Message-ID: <420153cb$0$28984$e4fe514c@news.xs4all.nl>

Mark Nenadov wrote:
> On Wed, 02 Feb 2005 23:03:17 +0100, Irmen de Jong wrote:
> 
> 
>>What would be the best way, if any, to obtain
>>the bytecode for a given loaded module?
>>
>>I can get the source:
>>import inspect
>>import os
>>src = inspect.getsource(os)
>>
>>but there is no ispect.getbytecode()  ;-)
>>
>>--Irmen
> 
> 
> The inspect API documentation says that code objects have "co_code", which
> is a string of raw compiled bytecode.
> 
> Hope that helps!

Not very much, sorry. Because we now changed the problem into:
"how to obtain the code object from a module".


Perhaps a bit of background is in order.
For Pyro, I'm sending module byte codes across the
wire if the other side needs it (the mobile code feature).
However, this only works for modules that can be loaded
from a file on disk (because I'm now reading the .pyc file
that belongs to the module). When the receiving end in turn
calls another Pyro object, it may have to send the module's
bytecode again-- but that is no longer possible because the
module has no associated file anymore! (It is considered to
be a builtin module)
But because it is *loaded*, there must be some way to get
to the bytecodes, right?


--Irmen


From guru.slt at gmail.com  Thu Feb 10 13:11:59 2005
From: guru.slt at gmail.com (xiaobin yang)
Date: Thu, 10 Feb 2005 13:11:59 -0500
Subject: Python v.s. c++
Message-ID: <a31065ef05021010117839eb05@mail.gmail.com>

Hi,  if i am already skillful with c++.  Is it useful to learn python? thanks!


From Scott.Daniels at Acm.Org  Thu Feb 24 10:37:52 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Thu, 24 Feb 2005 07:37:52 -0800
Subject: Dynamically pass a function arguments from a dict
In-Reply-To: <mailman.2987.1109207541.22381.python-list@python.org>
References: <opsmoch20bcq4h53@rr-22.mshome.net>
	<mailman.2987.1109207541.22381.python-list@python.org>
Message-ID: <421df0aa$1@nntp0.pdx.net>

Mark McEahern wrote:
> Dan Eloff wrote:
>> How can you determine that func2 will only accept
>> bar and zoo, but not foo and call the function with
>> bar as an argument? 
> 
> Let Python answer the question for you:
> 
> ... <good explanation of how to do this for simple functions.>

Please be aware the "normal" way to do this is go ahead and call
the function.  Many "function wrapping" techniques will fail this
test, and often the code that looks into the guts of a call in
order to do "something clever" will fail when it is pointed at
anything that uses the technique.

Not only does curry:

     http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52549

not show you what args it accepts, but decorators, a Python 2.4
invention, will typically obscure the interface of the decorated
function.  Since they wrap _any_ function call, they typically
take the most general arguments possible in order to accommodate
the widest range of functions to wrap.

--Scott David Daniels
Scott.Daniels at Acm.Org


From frans.englich at telia.com  Sun Feb 13 20:13:32 2005
From: frans.englich at telia.com (Frans Englich)
Date: Mon, 14 Feb 2005 01:13:32 +0000
Subject: Kill GIL
In-Reply-To: <cuospv$lfn$1@panix2.panix.com>
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<86sm405d38.fsf@guru.mired.org> <cuospv$lfn$1@panix2.panix.com>
Message-ID: <200502140113.32408.frans.englich@telia.com>

On Monday 14 February 2005 00:53, Aahz wrote:
> In article <86sm405d38.fsf at guru.mired.org>, Mike Meyer  <mwm at mired.org> 
wrote:
> >aahz at pythoncraft.com (Aahz) writes:
> >> In article <868y5t6sal.fsf at guru.mired.org>, Mike Meyer  <mwm at mired.org> 
wrote:
> >>>Here here. I find that threading typically introduces worse problems
> >>>than it purports to solve.
> >>
> >> Threads are also good for handling blocking I/O.
> >
> >Actually, this is one of the cases I was talking about. I find
> >it saner to convert to non-blocking I/O and use select() for
> >synchronization. That solves the problem, without introducing any of
> >the headaches related to shared access and locking that come with
> >threads.
>
> It may be saner, but Windows doesn't support select() for file I/O, and
> Python's threading mechanisms make this very easy.  If one's careful
> with application design, there should be no locking problems.  (Have you
> actually written any threaded applications in Python?)

Hehe.. the first thing a google search on "python non-blocking io threading" 
returns "Threading is Evil".

Personally I need a solution which touches this discussion. I need to run 
multiple processes, which I communicate with via stdin/out, simultaneously, 
and my plan was to do this with threads. Any favorite document pointers, 
common traps, or something else which could be good to know?


Cheers,

		Frans



From mahs at telcopartners.com  Sun Feb 13 18:40:57 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sun, 13 Feb 2005 15:40:57 -0800
Subject: Iterator / Iteratable confusion
In-Reply-To: <200502131958.27410.francis.girard@free.fr>
References: <420a5c1e$0$21630$a1866201@visi.com>	<slrnd0q67t.52v.curty@einstein.electron.net>	<200502131848.03655.francis.girard@free.fr>
	<200502131958.27410.francis.girard@free.fr>
Message-ID: <cuoocc$1au$1@sea.gmane.org>

Francis Girard wrote:
> """
> ================================================================================
> Example 8
> ================================================================================
> Running after your tail with itertools.tee
> 
> 
> The beauty of it is that recursive running after their tail FP algorithms
> are quite straightforwardly expressed with this Python idiom.
> """
> 
> def Ex8_Fibonacci():
>   print "Entering Ex8_Fibonacci"
>   def _Ex8_Fibonacci():
>     print "Entering _Ex8_Fibonacci"
>     yield 1
>     yield 1
>     fibTail.next() # Skip the first one
>     for n in (head + tail for (head, tail) in izip(fibHead, fibTail)):
>       yield n
>   fibHead, fibTail, fibRes = tee(_Ex8_Fibonacci(), 3)
>   return fibRes
>   
> print
> print sEx8Doc
> print
> print list(islice(Ex8_Fibonacci(), 5))
> 
Absolutely: ever since you brought up the Hamming sequence I've been interested 
in this approach.  However, if iterators could be extended in place, these 
solutions would be even more attractive.

Here are some examples for infinite series constructed with an extendable 
iterator.  This iterator is returned by an iterable class 'Stream', shown below 
the examples:

def factorial():
     """
     >>> f = factorial()
     >>> f.tolist(10)
     [1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880]
     """

     factorial = Stream([1])
     factorial.extend(factorial * it.count(1))

     return factorial

def fib():
     """Example:
     >>> f = fib()
     >>> f.tolist(10)
     [1, 1, 2, 3, 5, 8, 13, 21, 34, 55]"""
     fib = Stream([1,1])
     fib.extend(x+y for x, y in it.izip(fib, fib[1:]))
     return fib



def multimerge(*iterables):
     """Yields the items in iterables in order, without duplicates"""
     cache = {}
     iterators = map(iter,iterables)
     number = len(iterables)
     exhausted = 0
     while 1:
         for it in iterators:
             try:
                 cache.setdefault(it.next(),[]).append(it)
             except StopIteration:
                 exhausted += 1
                 if exhausted == number:
                     raise StopIteration
         val = min(cache)
         iterators = cache.pop(val)
         yield val

def hamming():
     """
     Example:
     >>> h = hamming()
     >>> list(h[20:40])
     [40, 45, 48, 50, 54, 60, 64, 72, 75, 80, 81, 90, 96, 100, 108, 120, 125, 
128, 135, 144]
     >>> h[10000]
     288555831593533440L
     """

     hamming = Stream([1])
     hamming.extend(i for i in multimerge(2 * hamming, 3 * hamming, 5 * hamming))
     return hamming


def compounds():
     """Extension of Hamming series to compounds of primes(2..13)
     Example:
     >>> c = compounds()
     >>> list(c[20:30])
     [24, 25, 26, 27, 28, 30, 32, 33, 35, 36]"""
     compounds = Stream([1])
     compounds.extend(i for i in multimerge(2 * compounds, 3 * compounds, 5 * 
compounds, 7 * compounds, 9 * compounds, 11 * compounds, 13 * compounds))
     return compounds


# Stream class for the above examples:

import itertools as it
import operator as op

class Stream(object):
     """Provides an indepent iterator (using tee) on every iteration request
         Also implements lazy iterator arithmetic"""

     def __init__(self, *iterables, **kw):
         """iterables: tuple of iterables (including iterators).  A sequence of
         iterables will be chained
         kw: not used in this base class"""
         self.queue = list(iterables)
         self.itertee = it.tee(self._chain(self.queue))[0] # We may not need 
this in every case

     def extend(self,other):
         """extend(other: iterable) => None
             appends iterable to the end of the Stream instance
         """
         self.queue.append(other)

     def _chain(self, queue):
         while queue:
             for i in self.queue.pop(0):
                 self.head = i
                 yield i

     # Iterator methods:

     def __iter__(self):
         """Normal iteration over the iterables in self.queue in turn"""
         return self.itertee.__copy__()

     def _binop(self,other,op):
         """See injected methods - __add__, __mul__ etc.."""
         if hasattr(other,"__iter__"):
             return (op(i,j) for i, j in it.izip(self,other))
         else:
             return (op(i,other) for i in self)

     def __getitem__(self,index):
         """__getitem__(index: integer | slice)
         index: integer => element at position index
         index: slice
             if slice.stop is given => Stream(it.islice(iter(self),
                         index.start, index.stop, index.step or 1)))
             else: consumes self up to start then => Stream(iter(self))
                 Note slice.step is ignored in this case
         """
         if isinstance(index, slice):
             if index.stop:
                 return (it.islice(iter(self),
                         index.start or 0, index.stop, index.step or 1))
             else:
                 iterator = iter(self)
                 for i in range(index.start):
                     iterator.next()
                 return iterator
         else:
             return it.islice(iter(self), index,index+1).next()

     def getattr(self,attrname):
         """__getattr__/getattr(attrname: string)
         => Stream(getattr(item,attrname) for item in self)
         Use the getattr variant if the attrname is shadowed by the Stream class"""

         return (getattr(item,attrname) for item in self)
     __getattr__ = getattr


     # Representational methods

     def tolist(self, maxlen = 100):
         return list(it.islice(iter(self),maxlen))

     def __repr__(self):
         return "Stream instance at:%x: %s" % (id(self),
         repr(self.queue))


# Inject special methods for binary operations:
_binopdoc = """%(func)s(other: constant | iterable, op: binary function)
         other: constant => Stream(op.%(op)s(i,other) for i in self))
         other: iterable => Stream(op.%(op)s(i,j) for i, j in it.izip(self,other))
         """

[setattr(Stream,attr, func(argspec = "self, other",
                             expr = "self._binop(other, op.%s)" % opfunc,
                             doc=_binopdoc % {"func":attr, "op":opfunc},
                             name=attr)
         )
         for attr, opfunc in {
                             "__mul__":"mul",
                             "__add__":"add",
                             "__sub__":"sub",
                             "__div__":"div",
                             "__mod__":"mod",
                             "__pow__":"pow",
                             }.items()
]
# End inject special methods








From bj_666 at gmx.net  Wed Feb  2 12:37:03 2005
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 02 Feb 2005 18:37:03 +0100
Subject: "pickle" vs. f.write()
References: <opsk7f4zcua89mar@condor>	<mailman.1393.1106776145.22381.python-list@python.org>	<41FF70A5.8070806@tx3.com>
Message-ID: <pan.2005.02.02.10.26.20.738045@gmx.net>

In <41FF70A5.8070806 at tx3.com>, Martin Miller wrote:

> I've found extending this property to your own classes often fairly easy
> to implement (and useful). For example:
> 
>> class person:
>>     def __init__(self, name="", age=0, friends=None, comment=""):
>>         if friends is None:
>>             friends = []
>>         self.name, self.age, self.friends, self.comment = name, age, friends, comment
>> 
>>     def __repr__(self):
>>         return ("person(" + repr(self.name) + ", " + repr(self.age) + ", " +
>>                 repr(self.friends) +  ", " + repr(self.comment) + ")")

I write __repr__() methods similar but I think a bit more readable:

  def __repr__(self):
      return "%s(%r, %r, %r, %r)" % (self.__class__.__name__, self.name,
                                     self.age, self.friends, self.comment)

And it's robust against changing the class name.  It even works in
subclasses if the signature of the __init__() method stays the same.

Ciao,
	Marc 'BlackJack' Rintsch


From steven.bethard at gmail.com  Fri Feb  4 14:17:24 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 04 Feb 2005 12:17:24 -0700
Subject: empty classes as c structs?
In-Reply-To: <mailman.1906.1107543562.22381.python-list@python.org>
References: <mailman.1906.1107543562.22381.python-list@python.org>
Message-ID: <7rSdne7BcbDeV57fRVn-jg@comcast.com>

Christopher J. Bottaro wrote:
> I find myself doing the following very often:
> 
> class Struct:
>         pass
> ...
> blah = Struct()
> blah.some_field = x
> blah.other_field = y
> ...
> 
> Is there a better way to do this?

Yes -- help me rally behind my generic object PEP which proposes a Bunch 
type (probably to be renamed) for the Python standard lib. =)  With this 
type, you could write your code as:

     blah = Bunch()
     blah.some_field = x
     blah.other_field = y

or simply:

     blah = Bunch(some_field=x, other_field=y)

I requested a PEP number on 2 Jan 2005, but haven't heard back yet. 
However, you can see a recent draft of the PEP at:

http://mail.python.org/pipermail/python-list/2005-January/262201.html

and you can see the first version of the patch at:

http://sourceforge.net/tracker/?func=detail&atid=305470&aid=1094542&group_id=5470

If you'd like to use the Bunch type now (instead of waiting for a future 
version of Python, assuming it's accepted), the current code for the 
Bunch class follows.

STeVe

----------------------------------------------------------------------
# Copyright (c) 2004 Python Software Foundation.
# All rights reserved.

# Written by Steven Bethard <steven.bethard at gmail.com>

import operator as _operator

class Bunch(object):
     """Bunch([bunch|dict|seq], **kwds) -> new bunch with specified
     attributes

     The new Bunch object's attributes are initialized from (if
     provided) either another Bunch object's attributes, a
     dictionary, or a sequence of (name, value) pairs, then from the
     name=value pairs in the keyword argument list.

     Example Usage:
     >>> Bunch(eggs=1, spam=2, ham=3)
     Bunch(eggs=1, ham=3, spam=2)
     >>> Bunch({'eggs':1, 'spam':2, 'ham':3})
     Bunch(eggs=1, ham=3, spam=2)
     >>> Bunch([('eggs',1), ('spam',2), ('ham',3)])
     Bunch(eggs=1, ham=3, spam=2)
     >>> Bunch(Bunch(eggs=1, spam=2), ham=3)
     Bunch(eggs=1, ham=3, spam=2)
     """

     def __init__(*args, **kwds):
         """Initializes a Bunch instance."""
         Bunch.update(*args, **kwds)

     def __eq__(self, other):
         """x.__eq__(y) <==> x == y

         Two Bunch objects are considered equal if they have the same
         attributes and the same values for each of those attributes.
         """
         return (other.__class__ == self.__class__ and
                 self.__dict__ == other.__dict__)

     def __repr__(self):
         """x.__repr__() <==> repr(x)

         If all attribute values in this bunch (and any nested
         bunches) are reproducable with eval(repr(x)), then the Bunch
         object is also reproducable for eval(repr(x)).
         """
         return '%s(%s)' % (self.__class__.__name__,
                            ', '.join('%s=%r' % (k, v)
                                      for k, v
                                      in self.__dict__.items()))

     @staticmethod
     def update(*args, **kwargs):
         """update(bunch, [bunch|dict|seq,] **kwargs) -> None

         Updates the first Bunch object's attributes from (if
         provided) either another Bunch object's attributes, a
         dictionary, or a sequence of (name, value) pairs, then from
         the name=value pairs in the keyword argument list.
         """
         if not 1 <= len(args) <= 2:
             raise TypeError('expected 1 or 2 arguments, got %i' %
                             len(args))
         self = args[0]
         if not isinstance(self, Bunch):
             raise TypeError('first argument to update should be Bunch, '
                             'not %s' % type(self).__name__)
         if len(args) == 2:
             other = args[1]
             if isinstance(other, Bunch):
                 other = other.__dict__
             try:
                 self.__dict__.update(other)
             except (TypeError, ValueError):
                 raise TypeError('cannot update Bunch with %s' %
                                 type(other).__name__)
         self.__dict__.update(kwargs)


From bill.mill at gmail.com  Fri Feb  4 14:58:46 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Fri, 4 Feb 2005 14:58:46 -0500
Subject: string issue
In-Reply-To: <cu0j92$kf7$2@solaris.cc.vt.edu>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
	<36QMd.103084$Jk5.36127@lakeread01> <cu0j92$kf7$2@solaris.cc.vt.edu>
Message-ID: <797fe3d40502041158288c8a0a@mail.gmail.com>

On Fri, 04 Feb 2005 14:43:30 -0500, rbt <rbt at athop1.ath.vt.edu> wrote:
> Steve Holden wrote:
> > rbt wrote:
> >
> >> Either I'm crazy and I'm missing the obvious here or there is
> >> something wrong with this code. Element 5 of this list says it doesn't
> >> contain the string 255, when that's *ALL* it contains... why would it
> >> think that???
> >>
> >> import time
> >>
> >> ips = ['255.255.255.255', '128.173.120.79', '198.82.247.98',
> >> '127.0.0.1', '255.0.0.0', '255', '128.173.255.34']
> >>
> >> for ip in ips:
> >>     if '255' in ip:
> >>         try:
> >>             print "Removing", ip
> >>             ips.remove(ip)
> >>         except Exception, e:
> >>             print e
> >>
> >> print ips
> >> time.sleep(5)
> >>
> >> Someone tell me I'm going crazy ;)
> >
> >
> > You are modifying the list as you iterate over it. Instead, iterate over
> > a copy by using:
> >
> > for ip in ips[:]:
> >   ...
> >
> > regards
> >  Steve
> 
> Very neat. That's a trick that everyone should know about. I vote it
> goes in Dr. Dobbs newsletter.

Once you know it, it's neat, and I use it sometimes. However, it's a
little too "magical" for my tastes; I'd rather be more explicit about
what's going on.

Peace
Bill Mill
bill.mill at gmail.com

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


From steve at myplace.com  Mon Feb 21 17:31:17 2005
From: steve at myplace.com (Steve M)
Date: Mon, 21 Feb 2005 16:31:17 -0600
Subject: Tuple index
References: <cvbcc6$b5f$1@news.netins.net>
	<1108951559.490554.305310@l41g2000cwc.googlegroups.com>
	<cvdian$ejs$1@news.netins.net> <zvOdneQkB6SyzoffRVn-jw@comcast.com>
	<cvdll3$f4u$1@news.netins.net> <bbKdnR8nSbAXwIffRVn-rg@comcast.com>
Message-ID: <cvdnqm$eao$2@news.netins.net>

Steven Bethard wrote:

> Steve M wrote:
>> I'm actually doing this as part of an exercise from a book. What the
>> program is supposed to do is be a word guessing game. The program
>> automaticly randomly selects a word from a tuple. You then have the
>> oportunity to ask for a hint. I created another tuple of hints, where the
>> order of the hints correspond to the word order. I was thinking if I
>> could get the index position of the randomly selected word, I pass that
>> to the hints tuple to display the correct hint from the hints tuple. I'm
>> trying to do it this way as the book I'm using has not gotten to lists
>> yet.
> 
> I'm guessing it also hasn't gotten to dicts yet either?  Perhaps a
> somewhat more natural way of doing this would be something like:
> 
> py> hints = dict(word1="here's hint 1!",
> ...              word2="here's hint 2!",
> ...              word3="here's hint 3!")
> py> words = list(hints)
> py> import random
> py> selected_word = random.choice(words)
> py> selected_word
> 'word3'
> py> print hints[selected_word]
> here's hint 3!
> 
> That said, if you want to find the index of a word in a tuple without
> using list methods, here are a couple of possibilities, hopefully one of
> which matches the constructs you've seen so far:
> 
> py> t = ("fred", "barney", "foo")
> 
> py> for i, word in enumerate(t):
> ...     if word == "barney":
> ...         break
> ...
> py> i
> 1
> 
> py> for i in range(len(t)):
> ...     if t[i] == "barney":
> ...         break
> ...
> py> i
> 1
> 
> py> i = 0
> py> for word in t:
> ...     if word == "barney":
> ...         break
> ...     i += 1
> ...
> py> i
> 1
> 
> HTH,
> 
> STeVe

Thanks Steve, I'll see if I can make that solution work for me.

Steve


From steven.bethard at gmail.com  Thu Feb 17 11:50:29 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 17 Feb 2005 09:50:29 -0700
Subject: difference between class methods and instance methods
In-Reply-To: <1119eklfad9v292@corp.supernews.com>
References: <pan.2005.02.17.07.04.37.907754@yahooz.com>
	<FcydnRLnuorM1onfRVn-2g@comcast.com>
	<1119eklfad9v292@corp.supernews.com>
Message-ID: <cYCdndz-6rzJVonfRVn-qw@comcast.com>

John wrote:
> Steven Bethard wrote:
>> John M. Gabriele wrote:
>> class C(object):
>>     @classmethod
>>     def f(cls, *args):
>>         # do stuff
> 
> Sorry -- I'm not as far along as you suspect. :) I've
> never yet seen this "@classmethod" syntax. I'm supposing that
> it's part of this so-called "new-style" class syntax.

This is syntactic sugar in Python 2.4 for:

class C(object):
     def f(cls, *args):
         # do stuff
     f = classmethod(f)

So if you'd like to check the docs, look in the builtins for classmethod 
(and staticmethod):

http://docs.python.org/lib/built-in-funcs.html


>  From your reply, I gather that, unless I'm using this special
> syntax (@classmethod or @staticmethod), all my def's are supposed
> to take 'self' as their first arg.

Yup.  You're of course welcome to name it whatever you like, but the 
methods defined in your class (when not wrapped with classmethod, 
staticmethod, etc.) will all be called with an instance of the class as 
their first argument.  So you need to make sure 'self' or something like 
it is the first parameter to the function.

> So then, are all def's -- that take 'self' as their first --
> argument -- in a class statement, instance methods?

Basically, yes.  (Again, assuming they're not wrapped with anything.)

>> Consider the difference between str.join and ''.join:
>>
>> py> str.join
>> <method 'join' of 'str' objects>
>  >
> 
>> py> ', '.join
>> <built-in method join of str object at 0x01233620>
>  >
> 
> Hmm... weird.

Ok, the point here is that str.join and ', '.join are not the same 
object.  The reason is that, when the ', ' instance of str is created, 
new "bound method" objects are created for each of the instance methods 
in str.  These "bound methods" all know that the first argument to their 
functions is ', '.

>> py> ', '.join(['a', 'b', 'c'])
>> 'a, b, c'
> 
> Check.
> 
>> py> str.join(', ', ['a', 'b', 'c'])
>> 'a, b, c'
> 
[snip]
> What's happening here?

str.join is the "unbound method" of the str object.  So just like you 
have to declare 'self' as the first argument of all your instance 
methods, the writer of the str object methods also declared 'self' as 
the first argumetn to str.join.  So str.join looks something like:

class str(object):
     ...
     def join(self, sequence):
         ...

So when you access it like str.join(...) you should be passing it an 
instance and a sequence.  On the other hand, the "bound method" created 
for ', ' has already bound the instance, so it no longer expects the 
'self' argument to be passed in.

HTH,

STeVe


From jepler at unpythonic.net  Sun Feb  6 15:43:07 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Sun, 6 Feb 2005 14:43:07 -0600
Subject: [noob] Questions about mathematical signs...
In-Reply-To: <614c778e.0502061226.5f40244c@posting.google.com>
References: <614c778e.0502061226.5f40244c@posting.google.com>
Message-ID: <20050206204306.GC16104@unpythonic.net>

On Sun, Feb 06, 2005 at 12:26:30PM -0800, administrata wrote:
> Hi! I'm programming maths programs.
> And I got some questions about mathematical signs.
> 
> 1. Inputing suqare like a * a, It's too long when I do time-consuming
>    things. Can it be simplified?

You can write powers with the "**" operator.  In this case,
    a ** 2

> 2. Inputing fractions like (a / b) + (c / d), It's tiring work too.
>    Can it be simplified?

Because of the rules of operator precedence,
    a / b + c / d
has the same meaning as the expression you gave.

> 3. How can i input root?

Assuming that you've already executed
    import math
Here are some ways to find the square root of a number:
    math.sqrt(4)
    4 ** .5
    math.pow(4, .5)

Jeff
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From fredrik at pythonware.com  Mon Feb  7 18:34:13 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 00:34:13 +0100
Subject: Modifying the global modules included with the distribution
References: <b1793a6b05020715092318244@mail.gmail.com>
Message-ID: <cu8tql$v8h$1@sea.gmane.org>

Justin Standard wrote:

> I'm trying to make some small modifications to the xml.dom.minidom
> module.  I'm developing on windows (since I have to at work), and I
> located the .py files which represent the module in the Python23/Lib
> directory, I made my changes to the file:
> Python/Lib/xml/dom/minidom.py.  However, when I run the interpreter,
> my changes aren't reflected.

Python23/Lib or Python/Lib ?

are you sure you know what you're editing?  if you're not 100% sure,
import the module, and print its __file__ attribute:

    >>> import xml.dom.minidom
    >>> xml.dom.minidom.__file__
    '/somewhere/python24/lib/xml/dom/minidom.pyc'

edit the corresponding PY file.  if the PYC path looks suspicious, remove
the PYC file and try again.

> Do I need to rebuild python to make these changes take?

no.

> Or is there some other process to modify global modules.  I realize that
> I _could_ have extended it, but this _seemed_ easier, and the work is already
> done.

and will be lost when you update Python, move your script to another
platform, etc.

</F> 





From steve at holdenweb.com  Wed Feb  2 09:38:03 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 02 Feb 2005 09:38:03 -0500
Subject: Hey, get this!  [was: import from database]
In-Reply-To: <k%WKd.98003$Jk5.87621@lakeread01>
References: <mailman.1509.1106923923.22381.python-list@python.org>
	<ctdlpq$ukf$00$1@news.t-online.com>
	<k%WKd.98003$Jk5.87621@lakeread01>
Message-ID: <4200E5CB.6020508@holdenweb.com>

Steve Holden wrote:

> Peter Otten wrote:
> 
>> Steve Holden wrote:
>>
>>
>>> This is even stranger: it makes it if I import the module a second time:
>>
>>
>>
>> [second import seems to succeed]
>>
>> Maybe you are experiencing some version confusion? What you describe 
>> looks
>> much like the normal Python 2.3 behaviour (with no import hook involved)
>> whereas you seem to operate on the 2.4 library.
>> A partially initialized module object is left behind in sys.modules 
>> and seen
>> by further import attempts.
>>
> I agree that this is 2.3-like behavior, but Python cannot lie ...
> 
> sholden at dellboy ~/Projects/Python/dbimp
> $ python
> Python 2.4 (#1, Dec  4 2004, 20:10:33)
> [GCC 3.3.3 (cygwin special)] on cygwin
> Type "help", "copyright", "credits" or "license" for more information.
>  >>>
> 
Just to make things simpler, and (;-) to appeal to a wider audience, 
here is a program that doesn't use database at all (it loads the entire 
standard library into a dict) and still shows the error.

What *I* would like to know is: who is allowing the import of bsddb.os, 
thereby somehow causing the code of the os library module to be run a 
second time.

#
# Establish standard library in dict
#
import os
import glob
import sys
import marshal
import new

def importpy(dct, path, modname, package):
     c = compile(file(path).read(), path, "exec")
     dct[modname] = (marshal.dumps(c), package, path)
     if package:
         print "Package", modname, path
     else:
         print "Module", modname, path

def importall(dct, path, modlist):
     os.chdir(path)
     for f in glob.glob("*"):
         if os.path.isdir(f):
             fn = os.path.join(path, f, "__init__.py")
             if os.path.exists(fn):
                 ml = modlist + [f]
                 importpy(dct, fn, ".".join(ml), 1)
                 importall(dct, os.path.join(path, f), ml)
         elif f.endswith('.py') and '.' not in f[:-3] and f != 
"__init__.py":
             importpy(dct, os.path.join(path, f), 
".".join(modlist+[f[:-3]]), 0)

class dbimporter(object):

     def __init__(self, item, *args, **kw):
         ##print "dbimporter: item:", item, "args:", args, "keywords:", kw
         if item != "*db*":
             raise ImportError
         print "Accepted", item

     def find_module(self, fullname, path=None):
         print "find_module:", fullname, "from", path
         if fullname not in impdict:
             #print "Bailed on", fullname
             return None
         else:
             print "found", fullname, "in db"
             return self

     def load_module(self, modname):
         print "load_module:", modname
         if modname in sys.modules:
             return sys.modules[modname]
         try:
             row = impdict[modname]
         except KeyError:
             #print modname, "not found in db"
             raise ImportError, "DB module %s not found in modules"
         code, package, path = row
         code = marshal.loads(code)
         module = new.module(modname)
         sys.modules[modname] = module
         module.__name__ = modname
         module.__file__ = path # "db:%s" % modname
         module.__loader__ = dbimporter
         if package:
             module.__path__ = sys.path
         exec code in module.__dict__
         print modname, "loaded:", repr(module), "pkg:", package
         return module

def install():
     sys.path_hooks.append(dbimporter)
     sys.path_importer_cache.clear() # probably not necessary
     sys.path.insert(0, "*db*") # probably not needed with a metea-path 
hook?

if __name__ == "__main__":
     impdict = {}
     for path in sys.argv[1:]:
         importall(impdict, path, [])
     install()
     import bsddb

Running this against a copy of the Python 2.4 standard library in C:\Lib 
gives me

[...]
Module _strptime C:\Lib\_strptime.py
Module _threading_local C:\Lib\_threading_local.py
Module __future__ C:\Lib\__future__.py
Accepted *db*
find_module: bsddb from None
found bsddb in db
load_module: bsddb
find_module: bsddb._bsddb from None
find_module: bsddb.sys from None
find_module: bsddb.os from None
find_module: bsddb.nt from None
find_module: bsddb.ntpath from None
find_module: bsddb.stat from None
Traceback (most recent call last):
   File "C:\Steve\Projects\Python\dbimp\dictload.py", line 79, in ?
     import bsddb
   File "C:\Steve\Projects\Python\dbimp\dictload.py", line 65, in 
load_module
     exec code in module.__dict__
   File "C:\Lib\bsddb\__init__.py", line 62, in ?
     import sys, os
   File "C:\Python24\lib\os.py", line 133, in ?
     from os.path import (curdir, pardir, sep, pathsep, defpath, extsep, 
altsep,
ImportError: No module named path

The 2.3 bsddb library doesn't cause the same problems (and even loads 
into 2.4 quite nicely). Lots of modules *will* import, and most packages 
don't seem to cause problems. Anyone give me a pointer here?

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005          http://www.python.org/pycon/2005/
Steve Holden                           http://www.holdenweb.com/


From luismgz at gmail.com  Mon Feb  7 02:01:10 2005
From: luismgz at gmail.com (Luis M. Gonzalez)
Date: 6 Feb 2005 23:01:10 -0800
Subject: WYSIWYG wxPython "IDE"....?
In-Reply-To: <1107751731.066796.295170@g14g2000cwa.googlegroups.com>
References: <1107560658.584623.303310@o13g2000cwo.googlegroups.com>
	<4205fcd9@news.highway1.com.au>
	<1107751731.066796.295170@g14g2000cwa.googlegroups.com>
Message-ID: <1107757798.707326.137480@l41g2000cwc.googlegroups.com>


Try PythonCard. 
Very simple, very easy and based on wxPython.



From administrata at hotmail.com  Sun Feb  6 15:26:30 2005
From: administrata at hotmail.com (administrata)
Date: 6 Feb 2005 12:26:30 -0800
Subject: [noob] Questions about mathematical signs...
Message-ID: <614c778e.0502061226.5f40244c@posting.google.com>

Hi! I'm programming maths programs.
And I got some questions about mathematical signs.

1. Inputing suqare like a * a, It's too long when I do time-consuming
   things. Can it be simplified?

2. Inputing fractions like (a / b) + (c / d), It's tiring work too.
   Can it be simplified?

3. How can i input root?

thx 4 reading :)


From jacek.generowicz at cern.ch  Tue Feb  1 05:30:26 2005
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 01 Feb 2005 11:30:26 +0100
Subject: Python's idiom for function overloads
References: <mailman.1677.1107230965.22381.python-list@python.org>
	<41ff066c$0$6473$636a15ce@news.free.fr>
	<ctnk79$bdv$1@news.hispeed.ch>
Message-ID: <tyfk6psmv25.fsf@pcepsft001.cern.ch>

"F. GEIGER" <f.geiger at vol.at> writes:

> As Philippe already said, use objects that support the protocol or decide
> what to do with it after having checked its type. I do that, if I have to,
> like so:
> 
> 1  def doIt(arg):
> 2    if type(arg) == type([]):
> 3        map(doIt, arg)
> 4     else:
> 5        # Do it on a scalar type
> 6        # ...
> 7        return result

Now, consider that line 3 would execute very happily if the type of
arg were 

1) list, 
2) str,
3) tuple,
4) dict,
5) file,
6) any other built-in iterable or sequence,
7) any useer-defined iterable or sequence,
8) a subclass of any of the above,
9) god knows what else ...

... yet in line 2 you have ensured that the whole function will not
work properly for any of the listed types other than the first.

You could make the code much more general by doing it like this:

    try:
        map(doIt, arg)
    except TypeError:
        ...


The important thing to note is that the actual types of Python objects
are usually not very interesting or important at all. What is much
more important is what the object is able to do: what messages it
understands, what protocols it supports.

Hiding some code behind a type-check, in Python, is quite frequently
the wrong thing to do.


From just at xs4all.nl  Sat Feb 26 15:59:40 2005
From: just at xs4all.nl (Just)
Date: Sat, 26 Feb 2005 21:59:40 +0100
Subject: any Python equivalent of Math::Polynomial::Solve?
References: <just-420C1F.16423926022005@news1.news.xs4all.nl>
	<cvqgn5$n0b$1@e250.ripco.com>
	<just-8EF886.20462126022005@news1.news.xs4all.nl>
	<cvqmvt$2rm$1@e250.ripco.com>
Message-ID: <just-D38ED0.21594026022005@news1.news.xs4all.nl>

In article <cvqmvt$2rm$1 at e250.ripco.com>,
 jgamble at ripco.com (John M. Gamble) wrote:

> >> The
> >> original source for the algorithm used in the module is
> >> from Hiroshi Murakami's Fortran source, and it shouldn't
> >> be too difficult to repeat the translation process to python.
> >
> >Ah ok, I'll try to locate that (following the instruction in Solve.pm 
> >didn't work for me :( ).
> >
> 
> Ouch.  I just did a quick search and found that that site has undergone
> a few changes, and the code that i reference is missing.  A few other
> links in the docs are stale too.  I need to update the documentation.
> 
> Anyway, doing a search for 'hqr' and Eispack got me a lot of sites.
> In particular, this one is pretty friendly:
> 
> <http://netlib.enseeiht.fr/eispack/>
> 
> Look at the source for balanc.f (does the prep-work) and hqr.f
> (does the solving).  Minor annoyance: the real and imaginary
> parts of the roots are in separate arrays.  I combined them into
> complex types in my perl source, in case you want to make a
> comparison.

Thanks! I'll check that out.

> Of course, all this may be moot if the other suggestions
> work out.

SciPy indeed appear to contain a solver, but I'm currently stuck in 
trying to _get_ it for my platform (OSX). I'm definitely not going to 
install a Fortran compiler just to evaluate it (even though my name is 
not "Ilias" ;-). Also, SciPy is _huge_, so maybe a Python translation of 
that Fortran code or your Perl code will turn out to be more attractive 
after all...

Just


From xah at xahlee.org  Wed Feb 16 04:16:50 2005
From: xah at xahlee.org (Xah Lee)
Date: 16 Feb 2005 01:16:50 -0800
Subject: problem: reducing comparison
In-Reply-To: <1108471704.220626.27530@g14g2000cwa.googlegroups.com>
References: <1108450348.253772.158120@z14g2000cwz.googlegroups.com>
	<1108471704.220626.27530@g14g2000cwa.googlegroups.com>
Message-ID: <1108545410.285927.153320@c13g2000cwb.googlegroups.com>

?someone sent me the following code, which performs identically with
the original reduce. (tested for pairings of comb(n) with large n)
Superb.
?
?def reduce2( pairings, pair ):
?    result={}
?    for i,j in pairings.itervalues():
?        if i in pair: i=pair[0]
?        if j in pair: j=pair[0]
?        if i>j: (i,j) = (j,i)
?        if i!=j: result["%d,%d"%(i,j)] = (i,j)
?    return result
?
?
?def reduce(pairings, pair):
?    ps=pairings.copy(); j=pair;
?    ps.pop("%d,%d"%(j[0],j[1]),0)
?    for k in pairings.itervalues():
?	if (k[0]==j[0]):
?            if (j[1] < k[1]):
?                ps.pop("%d,%d"%(j[1],k[1]),0)
?            else:
?                ps.pop("%d,%d"%(k[1],j[1]),0)
?        if (k[1]==j[0]):
?            if (k[0] < j[1]):
?                ps.pop("%d,%d"%(k[0],j[1]),0)
?            else:
?                ps.pop("%d,%d"%(j[1],k[0]),0)
?    return ps
?
?is reduce2 more efficient? It works entirely differently. I'll have
to think about it... besides algorithmic... onto the minute academic
diddling, i wonder if it is faster to delete entries in dict or add
entries...

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html

Xah Lee wrote:
> here are the answers:
>
> Perl code:
>
> sub reduce ($$) {
> my %hh= %{$_[0]}; # e.g. {'1,2'=>[1,2],'5,6'=>[5,6],...}
> my ($j1,$j2)=($_[1]->[0],$_[1]->[1]);  # e.g. [3,4]
> delete $hh{"$j1,$j2"};
> foreach my $k (keys %hh) {
>         $k=~m/^(\d+),(\d+)$/;
>         my ($k1,$k2)=($1,$2);
>         if ($k1==$j1) {
>             if ($j2 < $k2) {
>                 delete $hh{"$j2,$k2"};
>             }
>             else {
>                 delete $hh{"$k2,$j2"};
>             };
>         };
>         if ($k2==$j1) {
>             if ($k1 < $j2) {
>                 delete $hh{"$k1,$j2"};
>             }
>             else {
>                 delete $hh{"$j2,$k1"};
>             };
>         };
>     }
> return \%hh;
> }
>
> ...
> In imperative languages such as Perl and Python and Java, in general
it
> is not safe to delete elements when looping thru a list-like entity.
> (it screws up the iteration) One must make a copy first, and work
with
> the copy.
>
> Note also that in Python there's already a function called reduce.
(it
> is equivalent to Mathematica's Fold.) In Python, looks like user can
> over-ride default functions.
>
> This post is archived at
> http://xahlee.org/perl-python/pairing_reduce.html
> Possible errata or addenda will appear there.
> 
>  Xah
>  xah at xahlee.org
>  http://xahlee.org/PageTwo_dir/more.html



From faassen at infrae.com  Mon Feb  7 10:50:41 2005
From: faassen at infrae.com (Martijn Faassen)
Date: Mon, 07 Feb 2005 16:50:41 +0100
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
In-Reply-To: <1grk4ll.s9ln0u1bpp7huN%aleaxit@yahoo.com>
References: <ctsjmg$75p$1@usenet.otenet.gr>
	<pan.2005.02.03.19.10.39.349763@jerf.org>
	<ueCMd.22177$Ck1.1629547@news20.bellglobal.com>
	<mailman.1871.1107502855.22381.python-list@python.org>
	<1grk4ll.s9ln0u1bpp7huN%aleaxit@yahoo.com>
Message-ID: <42078E51.2010808@infrae.com>

Alex Martelli wrote:
> Fredrik Lundh <fredrik at pythonware.com> wrote:
> 
> 
>>Markus Wankus wrote:
>>
>>
>>>Google his name - he has been banned from Netbeans and Eclipse (and
>>>Hibernate, and others...) for good reason.  Can you imagine how much of
>>>a Troll you need to be to *actually* get "banned" from the newsgroups of
>>>open source projects such as those?
>>
>>have Pythoneers ever "banned" anyone from a public forum?  it's not like
>>we haven't seen trolls and crackpots before, you know.
> 
> 
> I don't see how banning is technically possible in unmoderated groups.
> Shunning, or pelting the troll with abuse whenever he shows up, etc,
> etc, sure.  But, banning?

The PSU can do it, by modifying the time stream. This is done by simply 
readjusting the basic parameter of the


From tonino.greco at gmail.com  Mon Feb 14 06:51:21 2005
From: tonino.greco at gmail.com (Tonino)
Date: 14 Feb 2005 03:51:21 -0800
Subject: gui scripting
Message-ID: <1108381881.828494.98340@c13g2000cwb.googlegroups.com>

HI,

I have a 2 phase question:

Phase 1 is I am needing to automate a report generation from a
proprietary product.  Currently a person sits and input's the data into
a GUI frontend and clicks's the appropriate buttons to start the report
generation.  What I am wanting todo is automate this, but since the GUI
is from a proprietary product all I have is the GUI.

This is done on a Linux Xfree server.  Can anyone please point me in a
direction to a pythonic gui scripting module ?
Python is the best tool and we use it elsewhere - so it is the best
option.

Second phase will have this done on a Windows platform... but that is
second priority ...

Thanks



From peter at engcorp.com  Wed Feb  9 18:35:11 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 09 Feb 2005 18:35:11 -0500
Subject: negative integer division
In-Reply-To: <420a9c7b$0$21598$a1866201@visi.com>
References: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
	<42096EAD.879E8A5F@yahoo.com> <86wtti76cp.fsf@guru.mired.org>
	<420A916C.94F7F175@yahoo.com> <420a9513$0$29477$a1866201@visi.com>
	<420A98C7.103157A@yahoo.com> <420a9c7b$0$21598$a1866201@visi.com>
Message-ID: <Q_GdnaA3S5XNA5ffRVn-oQ@powergate.ca>

Grant Edwards wrote:
> This is pretty much completely off-topic now.  :)

No discussion of how lame other languages are is ever
completely off-topic in comp.lang.python.  After all,
these discussions continue to remind us how lucky we
all are to be able to program in Python, and that
can only be a good thing. ;-)

-Peter


From ajsiegel at optonline.com  Wed Feb  9 20:42:53 2005
From: ajsiegel at optonline.com (Arthur)
Date: Wed, 09 Feb 2005 20:42:53 -0500
Subject: Vectors in Visual Python
References: <1107944975.498403.225950@f14g2000cwb.googlegroups.com>
	<pbvj01tiob4v5i6usnkr08j10s9koeh5kn@4ax.com>
	<1grqqa2.1cnkkbv1l5mrrxN%aleaxit@yahoo.com>
Message-ID: <isdl015rjvuf7o8gs6ig895m0npefj4aos@4ax.com>

On Thu, 10 Feb 2005 00:16:05 +0100, aleaxit at yahoo.com (Alex Martelli)
wrote:
>  Having found out how to
>build a lasting killfile, I'd like to see if using it liberally on
>people who appear to post here just to provoke flamewars, rather than to
>offer and receive help, and participate in interesting discussion, can

You are an accomplished provocateur. 

It is true that I joined the variable declaration discussion without
the intent of offering or receiving help.  I joined it actually to try
to make a point that I thought was community spirited - 
thinking that the visciousness with wihich you were attacking someone
suggesting a proposal for an optional feature - even if an iill
adivised proposal for and ill advised optional feature (I frankly
don't care much about that part of the discussion one way or another)
- was unwarranted, and more importantly *unwise* for someone in a
postion of community leadership - considering past, recent, and
undoubtedly future issues that have and will arise. 

What don't *you* understand about that??

We all have are own kinds of stupidities, it seems to me.

Art


From kent37 at tds.net  Mon Feb 14 20:52:03 2005
From: kent37 at tds.net (Kent Johnson)
Date: Mon, 14 Feb 2005 20:52:03 -0500
Subject: Newbie help
In-Reply-To: <Le8Qd.605$3b7.602@bignews3.bellsouth.net>
References: <lvUPd.10137$pE1.923@bignews3.bellsouth.net>
	<mailman.2568.1108413446.22381.python-list@python.org>
	<Le8Qd.605$3b7.602@bignews3.bellsouth.net>
Message-ID: <421152d0$1_1@newspeer2.tds.net>

Chad Everett wrote:
> Nope,  I am trying to learn it on my own.  I am using the book by Michael 
> Dawson.

You might be interested in the Python tutor mailing list which is specifically intended for beginners.
http://mail.python.org/mailman/listinfo/tutor

Kent


From steven.bethard at gmail.com  Thu Feb 17 11:53:33 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 17 Feb 2005 09:53:33 -0700
Subject: newbie question - iterating through dictionary object
In-Reply-To: <1108656866.128912.109800@f14g2000cwb.googlegroups.com>
References: <1108656866.128912.109800@f14g2000cwb.googlegroups.com>
Message-ID: <cYCdnd_-6ryWUYnfRVn-qw@comcast.com>

mirandacascade at yahoo.com wrote:
> 1) Is there any advantage to use the
> 
> y = a.keys()
> for z in y:
> 
> looping technique rather than the
> 
> for x in a:
> 
> looping technique?
> 
> 2) What are the tradeoffs for using each of the techniques?

Calling dict.keys creates a list in memory of the keys to the dict. 
Using the dict directly in the for-loop (which implicitly calls 
__iter__) will only load one key into memory at a time.  The only time 
you should call keys is if you *really* need a list.  If you're just 
going to iterate over them in a for-loop, you should definitely use the 
latter technique.

STeVe


From tzot at sil-tec.gr  Thu Feb 10 17:40:42 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Fri, 11 Feb 2005 00:40:42 +0200
Subject: lambda and for that matter goto not forgetting sugar
References: <tFJOd.38794$68.10179@fe1.news.blueyonder.co.uk>
	<mailman.2321.1108048902.22381.python-list@python.org>
Message-ID: <5non019hhm2uu2i2hhic9eu3eh21o2ct8u@4ax.com>

On Thu, 10 Feb 2005 15:21:47 +0000, rumours say that Richie Hindle
<richie at entrian.com> might have written:

>
>[Philip]
>> For that matter I would find implementing the classical algorithms far 
>> easier if python had 'goto'
>
>I can't believe it - first a request for COMEFROM and now one for GOTO,
>both on the same day.  I should have put http://entrian.com/goto/ under a
>commercial license.  8-)

*Three* requests --check the thread "goto, cls, wait  commands".  My humourous
suggestion of your module came before I read your own replies to the this and
the other thread.

BTW, my sincere congratulations for what I presume best computer related April's
Fool joke of all time; I love double-bluffs.  The worst of all is I've often
referenced your joke when advocating python... :)
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From caleb1 at telkomsa.net  Tue Feb  8 23:47:36 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Tue, 08 Feb 2005 23:47:36 -0500
Subject: Loop in list.
References: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
	<opslwwd7g71js0xs@news.telkomsa.net>
	<mailman.2212.1107896878.22381.python-list@python.org>
Message-ID: <opslwx9mck1js0xs@news.telkomsa.net>

Stephen

You're gonna have to help me here.....what is the effective difference?

Thanks
Caleb

>> '>>> a = []
>> '>>> for b in range(4):
>> '>>>     for i in range(3):
>> '>>>         a.append(i*2*b)
>
> There is a subtle error in this explanation. The equivilence actually
> looks like:
>
> '> a = []
> '> l1 = range(4)
> '> l2 = range(3)
> '> for b in l1:
> '>     for i in l2:
> '>         a.append(i*2*b)
>
> Stephen



From tzot at sil-tec.gr  Tue Feb 15 07:36:23 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Tue, 15 Feb 2005 14:36:23 +0200
Subject: Variables.
References: <614c778e.0502150429.1a2a4d8d@posting.google.com>
Message-ID: <4vq3119apgl58g7ghm0hdq1tf5nqceue65@4ax.com>

On 15 Feb 2005 04:29:26 -0800, rumours say that administrata at hotmail.com
(administrata) might have written:

>I wrote this, It's a bit lame though
>
>I = "Allen"
>me = "Allen"
>my = "Allen's"
>
>print \
>"""
>%s woke up early in the morning. But, it was unusal by %s. %s pillow
>was with %s. %s didn't want to wake up But, %s tried my best and woke up.
>it was so amazing!""" % (I,me,my,me,I,I)
>
>raw_input("\n\\t\t\t- The End -")
>
>But it looks like this...
>
>Allen woke up early in the morning. But, it was unusal by Allen. 
>Allen's pillow
>was with Allen. Allen didn't want to wake up But, Allen tried my best and woke up.
>it was so amazing
>
>                            - The End -

It looks exactly how it should, based on what you gave it.

Try the following changes:

>I = "Allen"
>me = "Allen"
>my = "Allen's"

to

xyzzy = "I"
footy = "me"
spike = "my"

and then change the last line of the triple-quoted string:

>it was so amazing!""" % (I,me,my,me,I,I)

to 

it was so amazing!""" % (xyzzy,footy,spike,footy,xyzzy,xyzzy)

Let us know what you expect to print after these changes.

>HELP plz

By all means --what's the problem exactly?
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From fredrik at pythonware.com  Wed Feb 16 01:54:02 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 16 Feb 2005 07:54:02 +0100
Subject: Compiler
References: <420990CF.7000705@ocf.berkeley.edu>
	<BAY102-F16C2D5E48CA8D5293EEE2C866B0@phx.gbl>
Message-ID: <cuuqgq$eej$1@sea.gmane.org>

"Roch ...." <dr_rave at hotmail.com> wrote:

> I am begenning to study python programing language and I was
> wondering how do I make an executable code with the interpreter
> ...like if i have my code in a text file.

if you have your code in a text file and you want to run it, just run the
"python" interpreter with the name of the text file as the first argument.

or, on windows, make sure that filename ends with ".py", and run the
file itself.

if you want to make an EXE file, see:

    http://effbot.org/zone/python-compile.htm

</F> 





From duncan.booth at invalid.invalid  Thu Feb 17 04:25:34 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 17 Feb 2005 09:25:34 GMT
Subject: difference between class methods and instance methods
References: <pan.2005.02.17.07.04.37.907754@yahooz.com>
Message-ID: <Xns96005FE3164DAduncanrcpcouk@127.0.0.1>

John M. Gabriele wrote:

> I've done some C++ and Java in the past, and have recently learned
> a fair amount of Python. One thing I still really don't get though
> is the difference between class methods and instance methods. I
> guess I'll try to narrow it down to a few specific questions, but
> any further input offered on the subject is greatly appreciated:

I'll try not to cover the same ground as Steven did in his reply.

> 
> 1. Are all of my class's methods supposed to take 'self' as their
> first arg?
consider this:
>>> class Demo(object):
    def foo(self, x):
        print self, x
    @classmethod
    def clsmethod(cls, x):
	print cls, x
    @staticmethod
    def stmethod(x):
	print x

	
>>> instance = Demo()

Calling a bound method, you don't pass an explicit self parameter, but the 
method receives a self parameter:

>>> bound = instance.foo
>>> bound(2)
<__main__.Demo object at 0x00B436B0> 2

Note that it doesn't matter whether you call instance.foo(2) directly, or 
bind instance.foo to a variable first. Either will create a *new* bound 
method object, and the correct instance is used for the call. This is 
significantly different from languages such as C++ and Javascript which are 
a real pain if you want to use a method as a callback.

Calling an unbound method, you pass a self parameter explicitly (and it 
must be an instance of the class, *or an instance of a subclass*:

>>> unbound = Demo.foo
>>> unbound(instance, 2)
<__main__.Demo object at 0x00B436B0> 2

Again is doesn't matter whether you do this in one step or two. The usual 
case for using an unbound method is when you have overridden a method in a 
derived class and want to pass the call on to a base class. e.g.

>>> class Derived(Demo):
    def foo(self, x):
         Demo.foo(self, x)

A class method is usually called through the class rather than an instance, 
and it gets as its first parameter the actual class involved in the call:

>>> Demo.clsmethod(2)
<class '__main__.Demo'> 2
>>> Derived.clsmethod(2)
<class '__main__.Derived'> 2

You can call a class method using an instance of the class, or of a 
subclass, but you still the get class passed as the first parameter rather 
than the instance:

>>> d = Derived
>>> d.clsmethod(2)
<class '__main__.Derived'> 2

A common use for class methods is to write factory functions. This is 
because you can ensure that the object created has the same class as the 
parameter passed in the first argument. Alternatively you can use class 
methods to control state related to a specific class (e.g. to count the 
number of instances of that exact class which have been created.)

There is no equivalent to a class method in C++.

Static methods are like static methods in C++. You can call them through 
the class or a subclass, or through an instance, but the object used in the 
call is not passed through to the method:

>>> Demo.stmethod(2)
2
>>> instance.stmethod(2)
2
>>> Derived.stmethod(2)
2
>>> d.stmethod(2)
2
>>> 

> 
> 2. Am I then supposed to call them with MyClass.foo() or instead:
> 
>     bar = MyClass()
>     bar.foo()
> ?

If you have an instance then use it. If the class method is a factory then 
you might want to create a new object of the same type as some existing 
object (but not a simple copy since you won't get any of the original 
object's state). Mostly though you know the type of the object you want to 
create rather than having an existing instance lying around.

> 
> 3. Is "bound method" a synonym for instance method?

Close but not quite. It is a (usually transient) object created from an 
unbound instance method for the purposes of calling the method.
> 
> 4. Is "unbound method" a synonym for class method?

Definitely not.

> 
> And if anyone's *really* daring:
> Where do the so-called "static methods" fit into all this?
> By the name of them, it sounds like the same thing as class
> methods...

See above.



From alefnula at gmail.com  Wed Feb 16 18:21:53 2005
From: alefnula at gmail.com (Viktor)
Date: 16 Feb 2005 15:21:53 -0800
Subject: Stable GUI + wxPython memory leak
In-Reply-To: <1108569376.721830.67370@o13g2000cwo.googlegroups.com>
References: <c0e7fd79.0502160619.565eb40e@posting.google.com>
	<1108564589.069982.71680@o13g2000cwo.googlegroups.com>
	<1108569376.721830.67370@o13g2000cwo.googlegroups.com>
Message-ID: <1108596113.424102.255340@f14g2000cwb.googlegroups.com>

I just noticed that wxPython is leaking memory?! Playing with
wxPython-demo, I started with 19MB used, and ended whith almost 150MB
used?!
It's wxPython 2.5.3.1 running on Python 2.4.



From ncoghlan at iinet.net.au  Thu Feb 10 08:50:09 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Thu, 10 Feb 2005 23:50:09 +1000
Subject: deepcopy chokes with TypeError on dynamically assigned instance
 method
In-Reply-To: <698m01djeu9jqpnvvk64vmc488e5c026im@4ax.com>
References: <698m01djeu9jqpnvvk64vmc488e5c026im@4ax.com>
Message-ID: <420B6691.7090300@iinet.net.au>

5?HH575-UAZWKVVP-7H2H48V3 wrote:
> class Foo(list):
>     "Foo"
> 
>     def __init__(self, l=[]):

Change this too:
   def __init__(self, l=None):
     if l is None: l = []


And see if your problem goes away.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From aleaxit at yahoo.com  Sat Feb  5 04:37:10 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 5 Feb 2005 10:37:10 +0100
Subject: changing local namespace of a function
References: <cu0lru$8ik$1@joe.rice.edu>
	<1107550212.114358.281200@z14g2000cwz.googlegroups.com>
	<cu13vi$ji7$1@joe.rice.edu>
	<1107582027.700961.156800@f14g2000cwb.googlegroups.com>
	<cu1n1t$507$1@joe.rice.edu>
Message-ID: <1gri9v3.145y7yo1uzwmprN%aleaxit@yahoo.com>

Bo Peng <bpeng at rice.edu> wrote:

> M.E.Farmer wrote:
> >  I really don't see your need.
> 
> Maybe it is just my laziness. It is almost intolerable for me to write
> lines and lines of code like
> 
>    d['z'] = func(d['x']+d['y']+d['whatever']['as']+d[a][0] )
> 
> It is ugly, unreadable and error prone. If I have to use this code, I
> would write
> 
>    _z = func(_x + _y + _whatever['as'] + _a[0])

So, what about having as the real code
     d.z = func(d.x + d.y + d.whatever['as'] + d.a[0])
Doesn't seem too different from what you would write, would it?

To wrap a dictionary into an object whose attributes are mapped to items
of the dictionary is not hard: just start your function with

    d = type('wrapadict', (), {})()
    d.__dict__ = the_dict_to_wrap

and there you are.

Affecting *BARE* names is a completely different order of magnitude of
complication away from affecting *COMPOUND* names.  Barenames are,
almost inevitably, handled with deep magic, essentially for the purposes
of can't-do-without optimization; compound names are _way_ more
malleable...


Alex


From timothy.grant at gmail.com  Thu Feb 10 14:28:27 2005
From: timothy.grant at gmail.com (Timothy Grant)
Date: Thu, 10 Feb 2005 11:28:27 -0800
Subject: Python-libnjb on macosx
Message-ID: <e775286d05021011283b288732@mail.gmail.com>

I was working on some things that use Glenn Strong's excellent libnjb
wrapper on my Linux box. I have since bought a PowerBook and have been
trying to get everything working correctly under OS/X.

This morning I got Python-libnjb to build without errors using the
following command:

ld -dynamic -dylib -L/sw/lib -L/sw/lib/python2.3/config njb_c_wrap.o
-o _njb_c.dylib -lpython2.3 -lnjb -lSystem -framework IOKit -ldylib1.o

However, when I try and import NJB.py I get the following:

(timothygrant at bastard%) pythonw NJB.py                  
Traceback (most recent call last):
  File "NJB.py", line 2, in ?
    import njb_c, sys, os, os.path, stat
  File "/Users/timothygrant/src/Python-libnjb/njb_c.py", line 5, in ?
    import _njb_c
ImportError: Inappropriate file type for dynamic loading

I'm guessing this means that while I got the library to build, I
didn't get it to build correctly. However, I'm enough of an OS/X
neophyte that I don't know which direction to turn.

Any suggestions?


-- 
Stand Fast,
    tjg.


From jjl at pobox.com  Sun Feb  6 19:52:14 2005
From: jjl at pobox.com (John J. Lee)
Date: 07 Feb 2005 00:52:14 +0000
Subject: Insane import behaviour and regrtest.py: heeelp
References: <87sm4aws3v.fsf@pobox.com>
	<mailman.2007.1107659039.22381.python-list@python.org>
	<876515ixj0.fsf@pobox.com>
	<mailman.2026.1107710574.22381.python-list@python.org>
	<87wttlh2jx.fsf@pobox.com>
	<mailman.2037.1107726800.22381.python-list@python.org>
Message-ID: <87oeexgpj5.fsf@pobox.com>

Tim Peters <tim.peters at gmail.com> writes:

> [John J. Lee]
> > I'm still puzzled, though.  Reading the -vv output, I see that when
[...]
> > Lib[0]$ pwd
> > /hda/usr/local/buf/python/python/dist/src/Lib
> 
> That doesn't look to be the same thing as the
> 
>     /usr/local/src/python/python/dist/src/Lib
> 
> you're asking about, right?
[...]

Ah: somehow managed to look straight through that, so used am I to the
presence of these symlinks:

Lib[0]$ ls -l /usr/local/src
lrwxrwxrwx    1 root     root           19 Sep  4 13:45 /usr/local/src -> /hda/usr/local/src//
Lib[0]$ ls -l /hda/usr/local/src/python
lrwxr-xr-x    1 john     oldjohn        25 Sep 11 13:21 /hda/usr/local/src/python -> /hda/usr/local/buf/python/


The twisty mess of symlinks and owners is down to a couple of OS and
hard disk changes.

I don't immediately see why at 1am, but I guess that's the problem
(that, and trying to understand import details at 1am...).

Thanks!


John


From francis.girard at free.fr  Sun Feb  6 17:05:06 2005
From: francis.girard at free.fr (Francis Girard)
Date: Sun, 6 Feb 2005 23:05:06 +0100
Subject: After 40 years ... Knuth vol 4 is to be published!!
In-Reply-To: <200502051239.j15Cdf6k005835@ratthing-b246.strakt.com>
References: <200502051239.j15Cdf6k005835@ratthing-b246.strakt.com>
Message-ID: <200502062305.06481.francis.girard@free.fr>

I think that Led Zeppelin, Pink Floyd and the Beatles (this time with John 
Lennon back from the cemetry) also made a come back. Addison-Wesley decided 
to preprint a photo of the messiah (just for us!)

Yippee!
Francis Girard

Le samedi 5 F?vrier 2005 13:39, Laura Creighton a ?crit?:
> "More than forty years in the making, the long-anticipated Volume 4
> of The Art of Computer Programming is about to make its debuta. in
> parts. Rather than waiting for the complete book, Dr. Knuth and
> Addison-Wesley are publishing it in installments ("fascicles") a la
> Charles Dickens.
>
> See http://www.bookpool.com/.x/xx/ct/163 for an excerpt and more info
> on Volume 4.
>
> And Addison-Wesley is offering Bookpool customers an exclusive sneak
> peek -- the first official excerpt from the series."
>
> (above from the same site)
> Yippee!
> Laura



From theller at python.net  Tue Feb  8 13:12:45 2005
From: theller at python.net (Thomas Heller)
Date: Tue, 08 Feb 2005 19:12:45 +0100
Subject: Efficient checksum calculating on lagre files
References: <5o2nd2-5hl.ln1@pluto.i.infosense.no>
	<slrnd0hrou.l3u.nick@irishsea.home.craig-wood.com>
Message-ID: <is52dioy.fsf@python.net>

Nick Craig-Wood <nick at craig-wood.com> writes:

> Ola Natvig <ola.natvig at infosense.no> wrote:
>>  Hi all
>> 
>>  Does anyone know of a fast way to calculate checksums for a large file. 
>>  I need a way to generate ETag keys for a webserver, the ETag of large 
>>  files are not realy nececary, but it would be nice if I could do it. I'm 
>>  using the python hash function on the dynamic generated strings (like in 
>>  page content) but on things like images I use the shutil's 
>>  copyfileobject function and the hash of a fileobject's hash are it's 
>>  handlers memmory address.
>> 
>>  Does anyone know a python utility which is possible to use, perhaps 
>>  something like the md5sum utility on *nix systems.
>
> Here is an implementation of md5sum in python.  Its the same speed
> give or take as md5sum itself.  This isn't suprising since md5sum is
> dominated by CPU usage of the MD5 routine (in C in both cases) and/or
> io (also in C).

Your code won't work correctly on Windows, since you have to open files
with mode 'rb'.

But there's a perfect working version in the Python distribution already:
tools/Scripts/md5sum.py

Thomas


From wittempj at hotmail.com  Sat Feb 12 19:48:01 2005
From: wittempj at hotmail.com (wittempj at hotmail.com)
Date: 12 Feb 2005 16:48:01 -0800
Subject: help please
In-Reply-To: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
References: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
Message-ID: <1108255681.026407.315710@f14g2000cwb.googlegroups.com>

add just below the procedure declaration 'global t2'  as you're
referring to a global variable ...



From robin at reportlab.com  Tue Feb  8 11:13:43 2005
From: robin at reportlab.com (Robin Becker)
Date: Tue, 08 Feb 2005 16:13:43 +0000
Subject: Efficient checksum calculating on lagre files
In-Reply-To: <5o2nd2-5hl.ln1@pluto.i.infosense.no>
References: <5o2nd2-5hl.ln1@pluto.i.infosense.no>
Message-ID: <4208E537.4070901@chamonix.reportlab.co.uk>

Ola Natvig wrote:
> Hi all
> 
> Does anyone know of a fast way to calculate checksums for a large file. 
> I need a way to generate ETag keys for a webserver, the ETag of large 
> files are not realy nececary, but it would be nice if I could do it. I'm 
> using the python hash function on the dynamic generated strings (like in 
> page content) but on things like images I use the shutil's 
> copyfileobject function and the hash of a fileobject's hash are it's 
> handlers memmory address.
> 
> Does anyone know a python utility which is possible to use, perhaps 
> something like the md5sum utility on *nix systems.
> 
> 
well md5sum is usable on many systems. I run it on win32 and darwin.

I tried this in 2.4 with the new subprocess module

def md5sum(fn):
	import subprocess
	return subprocess.Popen(["md5sum.exe", fn], 
stdout=subprocess.PIPE).communicate()[0]

import time
t0 = time.time()
print md5sum('test.rml')
t1 = time.time()
print t1-t0

and got

C:\Tmp>md5sum.py
b68e4efa5e5dbca37718414f6020f6ff *test.rml

0.0160000324249


Tried with the original
C:\Tmp>timethis md5sum.exe test.rml

TimeThis :  Command Line :  md5sum.exe test.rml
TimeThis :    Start Time :  Tue Feb 08 16:12:26 2005

b68e4efa5e5dbca37718414f6020f6ff *test.rml

TimeThis :  Command Line :  md5sum.exe test.rml
TimeThis :    Start Time :  Tue Feb 08 16:12:26 2005
TimeThis :      End Time :  Tue Feb 08 16:12:26 2005
TimeThis :  Elapsed Time :  00:00:00.437

C:\Tmp>ls -l test.rml
-rw-rw-rw-   1 user     group      996688 Dec 31 09:57 test.rml

C:\Tmp>

-- 
Robin Becker



From skip at pobox.com  Fri Feb 11 13:03:39 2005
From: skip at pobox.com (Skip Montanaro)
Date: Fri, 11 Feb 2005 12:03:39 -0600
Subject: Alternative to raw_input ?
In-Reply-To: <w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>
References: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>
	<mailman.2400.1108139722.22381.python-list@python.org>
	<w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>
Message-ID: <16908.62331.70813.556420@montanaro.dyndns.org>


    > Err, why?

    >> It looks to ugly this way. I want to press 
    >> any key without ENTER to continue

How about modifying it to

    raw_input("Press ENTER to continue ")

Skip


From mikey666 at 666swampgas.666com  Tue Feb  1 17:45:56 2005
From: mikey666 at 666swampgas.666com (The Artist Formerly Known as Kap'n Salty)
Date: Tue, 01 Feb 2005 16:45:56 -0600
Subject: web camera or else ? 15-30 fps processing of camera videos.
In-Reply-To: <1107295229.657375.318750@o13g2000cwo.googlegroups.com>
References: <1107295229.657375.318750@o13g2000cwo.googlegroups.com>
Message-ID: <420006a5$0$714$c3e8da3@news.astraweb.com>

Newbie wrote:
> I am doing some robotics projects but my main area of interest is
> trying out several algorithms for the processing of the stream of data
> coming from the video.
> 
> I am wondering what type of camera I should invest in. Either I could
> buy a web cam and hope I can find a driver I could either modify or
> use. i.e. every frame is somehow stored on the computer automagically
> or I could buy a camera not unlike the AVRcam
> (http://www.jrobot.net/Projects/AVRcam.html) or the CMUcam and try to
> do the processing once the data has been streamed to the nearest
> computer ? or should I use an expensive video card, some CCTV camera
> and a frame grabber to digitize photos so they can be processed
> afterwards. I expect my processing algorithms to handle at least 15
> frames per second framerate once they are working ont the final set-up.
> 
> My constraints are that I would like to avoid as much as possible
> complex set-ups even if that means buying a more expensive camera
> set-up. For the prototyping, I would like to try my algorithms out
> using a combination of python and matlab (all very slow) and then
> expect the same architecture (image files location and flow) with
> speedier set-up like python+psyco or C. All the processing would be
> done on a computer dedicated for that. Windows or Linux are possible.
> 

An easy approach to this is to use a wireless camera on your robot, with 
the receiver attached to a frame grabber on a remote host. This allows 
you your choice of camera (stand alone video transmitters are widely 
available), and you are not limited to only processing hardware you can 
carry on board your robot. You also get full FPS. Frame-grabber cards 
are inexpensive and widely available for both Windows and Linux.

Hope that helps -- tAfkaks



-- 
(Replies: cleanse my address of the Mark of the Beast!)

Teleoperate a roving mobile robot from the web:
http://www.swampgas.com/robotics/rover.html


From steve at myplace.com  Mon Feb 21 16:56:55 2005
From: steve at myplace.com (Steve M)
Date: Mon, 21 Feb 2005 15:56:55 -0600
Subject: Tuple index
References: <cvbcc6$b5f$1@news.netins.net>
	<1108951559.490554.305310@l41g2000cwc.googlegroups.com>
	<cvdian$ejs$1@news.netins.net>
	<1109021422.351702.296640@o13g2000cwo.googlegroups.com>
Message-ID: <cvdlq7$f4u$2@news.netins.net>

Michael Hartl wrote:

> I actually find it strange that tuples don't have an index function,
> since finding the index doesn't involve any mutation.  Anyone know why
> Python doesn't allow a statement like t.index('foo')?
> 
> In any case, you can use the index method of list objects if you
> convert your tuple to a list first:
> 
>>>> t = ("fred", "barney", "foo")
>>>> list(t).index("foo")
> 2
>>>> def index(a_tuple, element):
> ...     return list(a_tuple).index(element)
> ...
>>>> t[index(t, "foo")]
> 'foo'
> 
> (By the way, 'tuple' is a Python built-in type, so it's probably best
> to avoid using it as a variable name.)
> 
> 
> Michael
> 
> --
> Michael D. Hartl, Ph.D.
> CTO, Quark Sports LLC
> http://quarksports.com/

The book I'm using to learn Python with has not gotten to lists yet, maybe
next chapter.

I knew tuple is a built in type, I was just trying to be clear, I guess I
just muddied the water a bit. Thank you for your help.

Steve


From sharidas at zeomega.com  Wed Feb 16 12:42:02 2005
From: sharidas at zeomega.com (Satchidanand Haridas)
Date: Wed, 16 Feb 2005 23:12:02 +0530
Subject: renaming 'references' to functions can give recursive problems
In-Reply-To: <1108573114.574794.201470@g14g2000cwa.googlegroups.com>
References: <1108565645.179340.70600@o13g2000cwo.googlegroups.com>	<slrnd16pt6.enl.apardon@rcpc42.vub.ac.be>
	<1108573114.574794.201470@g14g2000cwa.googlegroups.com>
Message-ID: <421385EA.7020702@zeomega.com>

peter wrote:

>Hello, nice solution:
>but it puzzles me :)
>
>can anyone tell me why
>-----------correct solution----------------
>def fA(input):
>  return input
>
>def newFA(input, f= fA):
>   return f(input)
>
>fA = newFA
>
>is correct and:
>  
>
 >>> def fA(input):
...     print "inside fA"
...     return input
...
 >>> def newFA(input,f=fA):
...     print "inside newFA"
...     return f(input)
...
 >>> fA = newFA
 >>> fA(2)
inside newFA
inside fA
2

while:

>-------------infinite loop-----------------
>
>def fA(input):
>  return input
>
>def newFA(input):
>   return fA(input)
>
>fA = newFA
>
>gives an infinite recursive loop?
>
>  
>

 >>> def fA(input):
...     print "inside fA"
...     return input
...
 >>> def newFA(input):
...     print "inside newFA"
...     return fA(input)
...
 >>> fA = newFA
 >>> fA(2)
inside newFA
inside newFA
inside newFA
inside newFA


What is happening is that when you call fA (inside newFA) in the second 
case, you are calling newFA because fA is pointing to newFA (hope that 
made sense ;-)). So it was recursive. While in the former case you 
called f, which pointed to fA, but not to newFA. Probably the following 
will make it clearer:


 >>> def fA(input):
...     print "inside fA"
...     return input
...
 >>> def newFA(input,f=fA):
...     print "inside newFA"
...     print "f is pointing to: ",f
...     return f(input)
...
 >>> fA = newFA
 >>> fA(2)
inside newFA
f is pointing to:  <function fA at 0x43123374>
inside fA
2
 >>> fA
<function newFA at 0x43194064>
 >>> newFA
<function newFA at 0x43194064>

Thus f and fA do not point to the same function object when you execute 
the statement fa(2). This f is called once and terminates.


thanks,
Satchit


From firstname.lastname at iki.fi-spam  Wed Feb  2 17:31:47 2005
From: firstname.lastname at iki.fi-spam (Simo Melenius)
Date: 03 Feb 2005 00:31:47 +0200
Subject: Python's idiom for function overloads
References: <mailman.1677.1107230965.22381.python-list@python.org>
	<41ff066c$0$6473$636a15ce@news.free.fr>
Message-ID: <87lla6386k.fsf@sme.intra.citec.fi>

Philippe Fremy <phil at freehackers.org> writes:

> You can not reproduce the C++ overload idiom but you can get something
> close with manual type testing.
> 
>  > To in a
>  > function do an if statement with the type() function?
> 
> I am not aware of any other method.
> 
> def a( arg1 ):
> 	if type(arg1) == types.IntType: return aWithInt(arg1)
> 	if type(arg1) == types.ListType: return aWithList(arg1)
> 	...

Or:

def a_overloader (arg1):
    return my_typed_a_func_dict[type (arg1)] (arg1)

Next I'd put my hands in automating the creation of these wrappers and
the my_typed_a_func_dict map based on my implementation written so
far. Then I'd think of parameterizing on any arbitrary destructuring
of arguments like def foo ((a,b), c) and also on classes to which
instance methods are bound to. At this point, a preprocessor might be
handy to avoid seeing all the internals after which things would
probably start looking sick enough to either switch languages or
thinking of the right problem first and then come up with a pythonic
solution to _that_.


br,
S


From pu.news.001 at gmail.com  Sun Feb 27 05:58:58 2005
From: pu.news.001 at gmail.com (Patrick Useldinger)
Date: Sun, 27 Feb 2005 11:58:58 +0100
Subject: fdups: calling for beta testers
In-Reply-To: <4r8221tlstaq55j9uv7qls8r63jqgr38nu@4ax.com>
References: <421f97eb$1@news.vo.lu>
	<1109380525.262724.275780@g14g2000cwa.googlegroups.com>
	<422044b9$1@news.vo.lu>
	<1109451464.546948.174830@z14g2000cwz.googlegroups.com>
	<4220fdd7$1@news.vo.lu>
	<4r8221tlstaq55j9uv7qls8r63jqgr38nu@4ax.com>
Message-ID: <4221a7f3@news.vo.lu>

John Machin wrote:

>>I've tested it intensively
> "Famous Last Words" :-)

;-)

> (1) Manic s/w producing lots of files all the same size: the Borland
> C[++] compiler produces a debug symbol file (.tds) that's always
> 384KB; I have 144 of these on my HD, rarely more than 1 in the same
> directory.

Not sure what you want me to do about it. I've decreased the minimum 
block size once more, to accomodate for more files of the same length 
without increasing the total amount of memory used.

> (2) There appears to be a flaw in your logic such that it will find
> duplicates only if they are in the *SAME* directory and only when
> there are no other directories with two or more files of the same
> size. 

Ooops...
A really stupid mistake on my side. Corrected.

> (3) Your fdups-check gadget doesn't work on Windows; the commands
> module works only on Unix but is supplied with Python on all
> platforms. The results might just confuse a newbie:
> Why not use the Python filecmp module?

Done. It's also faster AND it works better. Thanks for the suggestion.

Please fetch the new version from http://www.homepages.lu/pu/fdups.html.

-pu


From Felix.Wiemann at gmx.net  Thu Feb 17 15:50:27 2005
From: Felix.Wiemann at gmx.net (Felix Wiemann)
Date: Thu, 17 Feb 2005 21:50:27 +0100
Subject: sampling items from a nested list
References: <7_adnQhRBYDdV47fRVn-sA@comcast.com>
Message-ID: <87sm3uc3n0.fsf@news2.ososo.de>

Steven Bethard wrote:

> py> data = [[('a', 0),
> ...          ('b', 1),
> ...          ('c', 2)],
> ...
> ...         [('d', 2),
> ...          ('e', 0)],
> ...
> ...         [('f', 0),
> ...          ('g', 2),
> ...          ('h', 1),
> ...          ('i', 0),
> ...          ('j', 0)]]
>
> I need to count the occurrences of each 'label' (the second item in
> each tuple) in all the items of all the sublists, and randomly remove
> some items until the number of occurrences of each 'label' is equal.

If the tuples are "heavier" than this, you can avoid comparing them
using the following algorithm (which probably still leaves some room for
optimization, e.g. simpler return_list building [or returning a
generator instead of a list], or directly building the sample set
instead of converting a random.sample to a set):

def resample(data):
    counts = {}
    for i in data:
        for j in i:
            counts[j[1]] = counts.setdefault(j[1], 0) + 1

    min_count = min(counts.itervalues())

    # Same keys, so we can reuse the counts dictionary.
    indices = counts
    for label, count in counts.iteritems():
        indices[label] = set(random.sample(xrange(count), min_count))

    # Same thing with a generator expression, building a new dict (dunno
    # what's faster).
    #indices = dict(((label, set(random.sample(xrange(count), min_count)))
    #                for label, count in counts.iteritems()))

    # "done" maps labels to the number of tuples (with that label) which
    # have been added to return_list.
    done = {}
    return_list = []
    for i in data:
        return_list.append([])
        for j in i:
            if done.setdefault(j[1], 0) in indices[j[1]]:
                return_list[-1].append(j)
            done[j[1]] += 1
    return return_list

-- 
Felix Wiemann -- http://www.ososo.de/


From Peter.Vandersteegen at gmail.com  Wed Feb 16 13:05:59 2005
From: Peter.Vandersteegen at gmail.com (peter)
Date: 16 Feb 2005 10:05:59 -0800
Subject: renaming 'references' to functions can give recursive problems
In-Reply-To: <mailman.2703.1108576441.22381.python-list@python.org>
References: <1108565645.179340.70600@o13g2000cwo.googlegroups.com>
	<mailman.2703.1108576441.22381.python-list@python.org>
Message-ID: <1108577159.661733.104710@g14g2000cwa.googlegroups.com>

brain reset and understood 

thx a lot for all your answers

Peter



From fredrik at pythonware.com  Mon Feb 14 18:30:41 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 15 Feb 2005 00:30:41 +0100
Subject: Multidimensional arrays - howto?
References: <1108423310.463006.318320@f14g2000cwb.googlegroups.com>
Message-ID: <curc5u$hs7$1@sea.gmane.org>

<doodle4 at gmail.com> wrote:

> I am trying to convert some C code into python. Since i am new to
> python, i would like to know how to deal with multidimensional arrays?

http://www.python.org/doc/faq/programming.html#how-do-i-create-a-multidimensional-list

might be helpful.

</F> 





From fuzzyman at gmail.com  Thu Feb  3 07:35:13 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 3 Feb 2005 04:35:13 -0800
Subject: CONTEST - What is the (best) solution?
In-Reply-To: <36edbdF51gkl6U1@individual.net>
References: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
	<36edbdF51gkl6U1@individual.net>
Message-ID: <1107434113.798274.320130@f14g2000cwb.googlegroups.com>

That's neater than my suggestion.

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From dontwant at spam.com  Thu Feb 10 00:58:06 2005
From: dontwant at spam.com (Courageous)
Date: Wed, 09 Feb 2005 21:58:06 -0800
Subject: A 'Python like' language
References: <40645d8f$0$10775$afc38c87@news.easynet.co.uk>
	<p1u860l6q98sc6ppihje55ptna298ub7si@4ax.com>
Message-ID: <sttl01lkruugnqjnrtjdqdbvg4dtm7f93i@4ax.com>


>We really need in Python a clear separation of advanced features from
>the basic syntax.  No more lambda calculus in the basic part. :>)

Well I considered writing a pep to move all that stuff to a module
called __icky__, you know:

from __icky__ import *

... but I didn't think the committee would go for it.

C///



From fumanchu at amor.org  Wed Feb  9 13:14:22 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Wed, 9 Feb 2005 10:14:22 -0800
Subject: Python and version control
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E33983C0@exchange.hqamor.amorhq.net>

Peter Hansen wrote:
> Carl wrote:
> > What is the ultimate version control tool for Python if you 
> > are working in a Windows environment? 
> 
> I never liked coupling the two together like that.  Instead
> I use tools like TortoiseCVS or (now) TortoiseSVN with a
> Subversion repository.  These things let you access revision
> control features from context (right-button) menus right in
> Windows Explorer, as you browse the file system.

Seconded.


Bob


From fredrik at pythonware.com  Wed Feb 16 03:15:56 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 16 Feb 2005 09:15:56 +0100
Subject: Copying data between file-like objects
References: <pan.2005.02.15.09.01.29.555879@ID-174572.user.uni-berlin.de><mailman.2634.1108486380.22381.python-list@python.org>
	<pan.2005.02.15.17.25.13.828572@ID-174572.user.uni-berlin.de>
Message-ID: <cuuvav$o9b$1@sea.gmane.org>

Thomas Lotze wrote:

>> if you don't know how large f2 can be, use shutil.copyfileobj:
>>
>>     >>> help(shutil.copyfileobj)
>>     Help on function copyfileobj in module shutil:
>>
>>     copyfileobj(fsrc, fdst, length=16384)
>>         copy data from file-like object fsrc to file-like object fdst
>
> This sounds like what I was looking for. Thanks for the pointer.
> However, the following doesn't seem like anything is being copied:
>
>>>> from StringIO import StringIO
>>>> from shutil import copyfileobj
>>>> s = StringIO()
>>>> s2 = StringIO()
>>>> s.write('asdf')
>>>> copyfileobj(s, s2)
>>>> s2.getvalue()

copyfileobj copies from the current location, and write leaves the file
pointer at the end of the file.  a s.seek(0) before the copy fixes that.

>> to copy stringio objects, you can use f1 = StringIO(f2.getvalue()).
>
> But this should have the same problem as using read(): a string will be
> created on the way which contains all the content.

getvalue() returns the contents of the f2 file as a string, and f1 will use that
string as the buffer.  there's no extra copying.

> Because I want to manipulate a copy of the data and be able to compare it
> to the original afterwards.

why not just use a plain string (or a list of strings)?  your focus on StringIO sounds
like a leftover from some C library you've been using in an earlier life ;-)

> Another thing I'd like to do is copy parts of a StringIO object's content
> to another object. This doesn't seem possible with any shutil method. Any
> idea on that?

use a plain string and slicing.  (if you insist on using StringIO, use seek and read)

> What one can really wonder, I admit, is why the difference between holding
> data two or three times in memory matters that much, especially if the
> latter is only for a short time. But as I'm going to use the code that
> handles the long string as a core component to some application, I'd like
> to make it behave as well as possible.

use plain strings, so you know what you're doing.

</F> 





From john at grulic.org.ar  Fri Feb 18 11:20:51 2005
From: john at grulic.org.ar (John Lenton)
Date: Fri, 18 Feb 2005 13:20:51 -0300
Subject: [perl-python] exercise: partition a list by equivalence
In-Reply-To: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
Message-ID: <20050218162051.GE17991@grulic.org.ar>

On Thu, Feb 17, 2005 at 03:46:20PM -0800, Xah Lee wrote:
> here's another interesting algorithmic exercise, again from part of a
> larger program in the previous series.
> 
> Here's the original Perl documentation:
> 
> =pod
> 
> merge($pairings) takes a list of pairs, each pair indicates the
> sameness
> of the two indexes. Returns a partitioned list of same indexes.
> 
> For example, if the input is
> merge( [ [1,2], [2,4], [5,6] ] );
> 
> that means 1 and 2 are the same. 2 and 4 are the same. Therefore
> 1==2==4. The result returned is
> 
> [[4,2,1],[6,5]];
> 
> (ordering of the returned list and sublists are not specified.)
> 
> =cut

in Python:

    def merge(pairings):
        rev = {}
        res = []
        for pairing in pairings:
            first, second = pairing
            has_first = first in rev
            has_second = second in rev
            if has_first and has_second:
                rev[first].extend(rev[second])
                rev[second][:] = []
                rev[second] = rev[first]
            elif has_first:
                rev[first].append(second)
                rev[second] = rev[first]
            elif has_second:
                rev[second].append(first)
                rev[first] = rev[second]
            else:
                copy = [first, second]
                res.append(copy)
                rev[first] = rev[second] = copy
        return filter(None, res)

and in Perl:

    sub merge($)
    {
        my %rev = ();
        my @res = ();
        my ($pairing, $first, $second, $has_first, $has_second);
        foreach $pairing (@{$_[0]})
        {
            ($first, $second) = @$pairing;
            $has_first = exists $rev{$first};
            $has_second = exists $rev{$second};
            if ($has_first and $has_second)
            {
                push @{$rev{$first}}, @{$rev{$second}};
                @{$rev{$second}} = ();
                $rev{$second} = $rev{$first};
            }
            elsif (exists $rev{$first})
            {
                push @{$rev{$first}}, $second;
                $rev{$second} = $rev{$first};
            }
            elsif (exists $rev{$second})
            {
                push @{$rev{$second}}, $first;
                $rev{$first} = $rev{$second};
            }
            else
            {
                my @copy = ($first, $second);
                push @res, \@copy;
                $rev{$first} = $rev{$second} = \@copy;
            }
        }
        return [grep @$_, @res];
    }

although in Perl you wouldn't define it to take a reference to a list
(as you did), but rather a list, and you wouldn't define it to return
a reference to a list, but rather a list in list context (and possibly
a reference in scalar context).

Both versions are (IMHO) pretty clear (when the docstring/pod is
included), and O(n) because dict/hash lookup and list
appending/pushing is O(1) in both languages. Both versions can
probably be tweaked for speed quite a bit, but I don't *think* there's
a better-than-O(n) algorithm for this.

Note that the Python version assumes that the pairs' elements are
hashable; your example used numbers, so I thought it was pretty safe
assumption. The Perl version has no such restriction.


-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
Noble cosa es, a?n para un anciano, el aprender.
		-- S?focles. (497-406 a.C.) Fil?sofo griego. 
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From rgacote at AppropriateSolutions.com  Fri Feb  4 18:30:41 2005
From: rgacote at AppropriateSolutions.com (Ray Cote)
Date: Fri, 4 Feb 2005 18:30:41 -0500
Subject: advice needed for simple python web app
In-Reply-To: <7xis58tgjr.fsf@ruckus.brouhaha.com>
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
	<ctv48p$75$1@eeyore.INS.cwru.edu>	<N86dnZ7k56I3gJ7fRVn-tg@rogers.com>
	<7xis58reac.fsf@ruckus.brouhaha.com>	<zsKdnThuwKcpGZ7fRVn-hA@rogers.com>
	<7xis58tgjr.fsf@ruckus.brouhaha.com>
Message-ID: <a06200712be29b5c73c14@[192.168.24.239]>

At 8:51 AM -0800 2/4/05, Paul Rubin wrote:
>"Dan Perl" <danperl at rogers.com> writes:
>>  This matches pretty much what I've decided to do.  I'll start with cgi and
>>  CGIHTTPServer because I'll learn more from that and then move to a
>>  framework, quite likely CherryPy, although by that time I may change my
>>  choice.  Philip Greenspun's book looks good and I'll have to go through it.
>>  Thanks for the advice.
>
>You might also look at the docs for HTML::Mason (www.masonhq.com) to
>get a look at a reasonably mature template system, even if you don't
>plan to use it (because it's in Perl and not Python).

There's a Python port of HTML::Mason called Myghty.
A fairly new project. I've just played around with it a bit
Well worth a look:  <http://www.myghty.org/>

-- 

Raymond Cote
Appropriate Solutions, Inc.
PO Box 458 ~ Peterborough, NH 03458-0458
Phone: 603.924.6079 ~ Fax: 603.924.8668
rgacote(at)AppropriateSolutions.com
www.AppropriateSolutions.com


From jaydonnell at gmail.com  Wed Feb 16 17:28:50 2005
From: jaydonnell at gmail.com (jdonnell)
Date: 16 Feb 2005 14:28:50 -0800
Subject: web spider and password protected pages
In-Reply-To: <_LudnUg0vJIsLI7fRVn-rA@powergate.ca>
References: <1108580601.884193.263890@g14g2000cwa.googlegroups.com>
	<_LudnUg0vJIsLI7fRVn-rA@powergate.ca>
Message-ID: <1108592930.373112.90560@c13g2000cwb.googlegroups.com>

"I quickly found
a page that starts "Here is an explanation about how to handle password
protected sites."

...

I hope that teaches you a bit about how to fish, rather than
just giving you one. ;-) "

Actually, I found a much easier solution, but since you know how to
fish I don't need to tell you what it is ;)



From jeff at ccvcorp.com  Tue Feb  8 15:49:36 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Tue, 08 Feb 2005 12:49:36 -0800
Subject: Basic file operation questions
In-Reply-To: <7q4Od.753$Sd.170775@newshog.newsread.com>
References: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
	<opsllt9r191js0xs@news.telkomsa.net>
	<mailman.1808.1107431422.22381.python-list@python.org>
	<ctt53b$l5u$00$1@news.t-online.com>
	<opslnm1cge1js0xs@news.telkomsa.net>
	<ctu62q$gud$04$1@news.t-online.com>
	<1107846197.701686.303390@l41g2000cwc.googlegroups.com>
	<7q4Od.753$Sd.170775@newshog.newsread.com>
Message-ID: <110i9cl27fbm27c@corp.supernews.com>

Marc Huffnagle wrote:

> When you read a file with that method, is there an implied close() call 
> on the file?  I assume there is, but how is that handled?
> 
[...]
>>> for line in file(...):
>>>   # do stuff

As I understand it, the disk file will be closed when the file object 
is garbage collected.  In CPython, that will be as soon as there are 
no active references to the file; i.e., in the above case, it should 
happen as soon as the for loop finishes.  Jython uses Java's garbage 
collector, which is a bit less predictable, so the file may not be 
closed immediately.  It *will*, however, be closed during program 
shutdown if it hasn't happened before then.

Jeff Shannon
Technician/Programmer
Credit International



From t-meyer at ihug.co.nz  Mon Feb 14 18:24:30 2005
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Tue, 15 Feb 2005 12:24:30 +1300
Subject: parsing IMAP responses?
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E802107B3C@its-xchg4.massey.ac.nz>
Message-ID: <ECBA357DDED63B4995F5C1F5CBE5B1E801DAFE79@its-xchg4.massey.ac.nz>

> Is there a library somewhere that impliments the IMAP protocol 
> syntax?

Twisted has pretty good IMAP support (particularly client), and it's much
higher level than imaplib.  It probably does what you're after.

Of course, the catch is that you have to use twisted <0.5 wink>.

=Tony.Meyer



From dbickett at gmail.com  Wed Feb  2 21:05:23 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Wed, 2 Feb 2005 21:05:23 -0500
Subject: Easy Q: dealing with object type
In-Reply-To: <420181b1$1@nntp.zianet.com>
References: <420181b1$1@nntp.zianet.com>
Message-ID: <1d6cdae3050202180577dea452@mail.gmail.com>

On Erik Johnson wrote:
> # The following "works", but I don't want to keep a set of instances to
> compare against
> >>> obj2 = A()
> >>> type(obj) == type(obj2)
> 1

How about:

>>> class A:
	pass
>>> class B:
	pass
>>> objA = A()
>>> type( objA ) == type( A() )
True

then again....

>>> objB = B()
>>> type( objA ) == type( B() )
True

they're both of type 'instance'. So how about this:

>>> class A:
	pass
>>> class B( object ):
	pass
>>> objA = A()
>>> objB = B()
>>> type( objA )
<type 'instance'>
>>> type( objB )
<class '__main__.B'>
>>> type( objB ) == B
True

I believe that achieves what you were aiming for.

-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From fperez.net at gmail.com  Tue Feb  8 00:38:53 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Mon, 07 Feb 2005 22:38:53 -0700
Subject: IDLE history, Python IDE, and Interactive Python with Vim
References: <opsllommgvb1cml1@ashot>
	<mailman.1983.1107626882.22381.python-list@python.org>
	<opsltet5kmej1m1c@ashot> <opsltfclp1ej1m1c@ashot>
Message-ID: <cu9j6u$baq$1@sea.gmane.org>

Ashot wrote:

> Sorry, a few more things I forgot to mention having to do with editing
> multiline entries in the console:
> 
> Autotab setting doesn't seem to have any effect, I have to type "ctrl-o"
> manually

I've noticed it doesn't work under win32.  It's fine under *nix.  There's only
so much Gary can do with his readline supplement in a win32 environment, I'm
not sure if this is something which he could add, you'd have to contact him
directly.  This would require support for insertions into the current line,
which may not even be possible in a windows terminal, I just don't know.

> Is there a setting that treats multiline entries as a single command, as IDLE
> does? In otherwords, allowing you to edit the entire entry, going up to
> previous lines, and treating as one when cycling through the history?  It
> seems like ipython recognizes these through the hist command, but not when
> editing or cycling.

This is impossible in a line-oriented terminal program.  What you are asking for
requires 2-d cursor control, which can only be provided in a gui environment,
or with curses in a terminal (or with custom terminal handling code). 
Basically, it means writing a complete screen-handling program, which is far
more than ipython can do.

I keep trying to start an internal ipython cleanup, so it could be embedded into
a gui environment.  Once that happens, it may be possible to use idle or
pycrust but with the ipython engine.  

Within the design constraints of not taking over the terminal with a curses (or
similar) environment, restricted to onlw raw_input() communication with the
user, what you are asking is a technical impossibility.

> Is it possible to use the "set editing-mode vi" option in ipython since it
> uses readline?  From reading online, it seems like this should be possible,
> however it doesn't work for me.   It works in bash, but once I enter either
> ipython or just regular python the keybindings don't work anymore.

I don't know if this works even under *nix, since I don't know if the python
readline library wraps this part of GNU readline.  I _do_ know that python only
wraps a subset of GNU readline, so I wouldn't be surprised if this wasn't
included.  It is not something specific to ipython, you'd have to ask the
readline developers directly.

Best,

f



From gurpreet.sachdeva at gmail.com  Thu Feb  3 00:49:34 2005
From: gurpreet.sachdeva at gmail.com (Gurpreet Sachdeva)
Date: Thu, 3 Feb 2005 11:19:34 +0530
Subject: Two classes problem
In-Reply-To: <opsllpombg1js0xs@news.telkomsa.net>
References: <mailman.1768.1107369788.22381.python-list@python.org>
	<opsllpombg1js0xs@news.telkomsa.net>
Message-ID: <a3cc95f005020221497acff3f9@mail.gmail.com>

The purpose is, I pass a list to a class in a module but I want to use
that list out of the scope of that class and that too not in any other
class or a function but in the main program...
The problem is that when I import that, the statements in the module
which are not in the class are executed first and then the variable
gets intiallised...
I will explain with the example...

-global test
-
-class a:
-        def __init__(self,test):
-                global test
-                print test
-
-print 'Outside: '+test

I want to print that variable test which I am giving to the class as
an argument, in the scope of main...
I know it is not a good way of programming but my situation is like this...
But is this possible or not? If I pass test as 'Garry' can I (by any
way) print 'Outside: Garry' with that print statement... (in the main
scope)

Thanks and Regards,
Garry


From jerf at jerf.org  Sun Feb  6 08:20:29 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Sun, 06 Feb 2005 08:20:29 -0500
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<qb1a01lk3mv4vp852q88prqb9al336h9r2@4ax.com>
	<1grj036.r13xcy1d72inbN%aleaxit@yahoo.com>
	<2qba01d1men2ai48gp4cojo2e28rd5g9ob@4ax.com>
	<1grjzia.1a4qr9q1t3p77bN%aleaxit@yahoo.com>
	<pt1c015297m7t64cu2g27dbjbrl2ehacbi@4ax.com>
Message-ID: <pan.2005.02.06.13.20.28.565408@jerf.org>

On Sun, 06 Feb 2005 07:30:33 -0500, Arthur wrote:
> What if:
> 
> There was a well conducted market survey conclusive to the effect that
> adding optional strict variable declaration would, in the longer run,
> increase Python's market share dramatically.
> 
> It just would.
> 
> Why would it?

What if, by eating a special mixture of cheddar and marshmallows, you
could suddenly fly?

It just would.

Why would it?

(The point, since I don't trust you to get it: The "absurd question" is
neither a valid argument technique, nor is it even good rhetoric. You
might as well go straight to "What if I'm right and you're wrong? What
then, huh?")

> My sense of how the real world works is that there is going to be one
> anti-Python advocate lying in wait for the first bug he can find that he
> can say would have been caught if Python had strict variable declaration,
> as he always knew it should.
> 
> He wants to be the PHB someday. The current PHB knows that, and since
> being sensitive to these kinds of realities is how he got to be the PHB,
> he is too smart to open himself up to this kind of risk.
> 
> The PHB can pretty safely make the use of the option optional.  As long as
> he is a position to jump down the throat of the programmer who created the
> bug.

You really aren't very good at this "debate" thing.

"Look, I can construct a certain scenario whereby the dangers you propose
don't occur (assuming that I'm even right about my scenario in the first
place which is highly questionable). How do you respond to *that*? Huh?
Huh? Huh? Where's your precious 'overwhelming pattern' now?"

It hasn't gone anywhere.

> What is the correct language design decision in light of these realities?

In light of the above, I question your use of the plural.

> But isn't this kind of where Python is at the moment?

Only for you.

Despite the tone of the rest of this message, I mean that. It's obviously
a huge stumbling block for you. It isn't for the rest of us, and once
again, I assure you, it's going to take more than spinning implausible
isolated entirely theoretical examples to convince us otherwise.

Not only do you argue solely from anecdote, even the aforementioned
"implausible isolated entirely theoretical" anecdote, it appears to be all
you understand. You're going to have to do better than that. Producing a
*real* study that shows declaration would be a good thing, instead of an
implausible entirely theoretical one, would be a good start.


From sean_mcilroy at yahoo.com  Tue Feb 22 09:03:14 2005
From: sean_mcilroy at yahoo.com (Sean McIlroy)
Date: 22 Feb 2005 06:03:14 -0800
Subject: 'modal dialogs' with Tkinter
Message-ID: <e5063e96.0502220603.4163be98@posting.google.com>

I'd like to have a function f such that, when f is invoked, a Tk
window w is presented in which a number of variables can be modified,
and f returns the values that are indicated by the relevant
menus/checkbuttons/etc at the time w gets closed. I've tried various
ways of doing this, without success. Any assistance would be greatly
appreciated.

Peace,
Sean McIlroy


From timr at probo.com  Tue Feb 15 01:18:57 2005
From: timr at probo.com (Tim Roberts)
Date: Mon, 14 Feb 2005 22:18:57 -0800
Subject: image fourier transform
References: <curv39$jsl$01$1@news.t-online.com>
Message-ID: <8u4311tfr8jrh5dv03389p2fhtk9jsl5v9@4ax.com>

Johannes Ahl-mann <softpro at gmx.net> wrote:
>
>i've been looking all around the net (google is my friend ;-) for a
>module to apply fourier transformations on images. the different ones in
>numerical python and scientific python seem all to be operating on
>sequences and therefore seem to be 1D fourier transform.
>
>anyone know a library/module to do 2D image FFT in a simple manner.
>
>or am i just too dumb to see how this is supposed to work with the 1D
>fourier transforms??

To do a 2D FFT on a matrix X, you do 1D FFTs on all the rows, producing X',
then you do 1D FFTs on all the columns of X'.

So, for a 32x32 2D FFT, you'll end up doing 64 1D FFTs.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From cam.ac.uk at mh391.invalid  Sun Feb 13 12:12:30 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sun, 13 Feb 2005 17:12:30 +0000
Subject: changing __call__ on demand
In-Reply-To: <AJLPd.107521$Jk5.31052@lakeread01>
References: <cuo0e1$4l2$1@lnx107.hrz.tu-darmstadt.de>
	<AJLPd.107521$Jk5.31052@lakeread01>
Message-ID: <cuo1q1$m6h$2@gemini.csx.cam.ac.uk>

Alan McIntyre wrote:
> >>>class test(object):
> ...    def __call1(self):
> ...        print 1
> ...    __call__ = __call1
> Is that what you were looking for?

That still only allows him to have one call function per class.
-- 
Michael Hoffman


From raghulj at gmail.com  Tue Feb 22 23:24:02 2005
From: raghulj at gmail.com (Raghul)
Date: 22 Feb 2005 20:24:02 -0800
Subject: reading only new messages in imaplib
Message-ID: <1109132642.962280.252070@g14g2000cwa.googlegroups.com>

Is it posssible to read only the new messages or unread messages using
imaplib in python? If it is possible pls specify the module or give a
sample code.

Thanks in advance



From calvin at ironfroggy.com  Sat Feb 26 18:06:16 2005
From: calvin at ironfroggy.com (Calvin Spealman)
Date: Sat, 26 Feb 2005 23:06:16 +0000
Subject: PyUnit and multiple test scripts
Message-ID: <1233762.Qvm5ykpC2P@ironfroggy.com>

I'm trying to find the best way to use PyUnit and organize my test scripts.
What I really want is to separate all my tests into 'test' directories
within each module of my project. I want all the files there to define a
'suite' callable and to then all all those suites from all those test
directories into one big suite and run it all. I'm having trouble with
this.

My first barrier was just loading the modules. As I had to be able to find
them automatically (would be tedious to maintain a manual list of them) I
needed to then load the modules from the paths to the files after I found
them. This wasn't working, I just couldn't get it to load. I couldn't
understand the imp module correctly.

1) Is there a very simple way to just take a file path and name, that I
could use to open the source file, and load it as a module object, no
strings attached?

2) Is there already a framework around that will do what I need?

I've tried py.test, but I really do not like the way it displays results.



From cyril.bazin at gmail.com  Fri Feb 11 20:57:06 2005
From: cyril.bazin at gmail.com (Cyril BAZIN)
Date: Sat, 12 Feb 2005 02:57:06 +0100
Subject: listerator clonage
Message-ID: <a10b8d6205021117573f6d403d@mail.gmail.com>

Hello, 

I want to build a function which return values which appear two or
more times in a list:

So, I decided to write a little example which doesn't work:
#l = [1, 7, 3, 4, 3, 2, 1]
#i = iter(l)
#for x in i:
#    j = iter(i)
#    for y in j:
#        if x == y:
#            print x

In thinked that the instruction 'j= iter(i)' create a new iterator 'j'
based on 'i' (some kind of clone). I wrote this little test which show
that 'j = iter(i)' is the same as 'j = i' (that makes me sad):

#l = [1, 7, 3, 4, 2]
#i = iter(l)
#j = iter(i)
#k = i
#i, j, k
(<listiterator object at 0x02167B50>, <listiterator object at
0x02167B50>, <listiterator object at 0x02167B50>)

Just in order to test, I wrote these little test:
#l = [1, 7, 3, 4, 2]
#i = iter(l)
#import pickle
#j = pickle.loads(pickle.dumps(i))
Traceback (most recent call last):
  File "<input>", line 1, in ?
  File "C:\Python24\lib\pickle.py", line 1386, in dumps
    Pickler(file, protocol, bin).dump(obj)
  File "C:\Python24\lib\pickle.py", line 231, in dump
    self.save(obj)
  File "C:\Python24\lib\pickle.py", line 313, in save
    rv = reduce(self.proto)
  File "C:\Python24\lib\copy_reg.py", line 69, in _reduce_ex
    raise TypeError, "can't pickle %s objects" % base.__name__
TypeError: can't pickle listiterator objects

#import copy
#j = copy.copy(i)
Traceback (most recent call last):
  File "<input>", line 1, in ?
  File "C:\Python24\lib\copy.py", line 95, in copy
    return _reconstruct(x, rv, 0)
  File "C:\Python24\lib\copy.py", line 320, in _reconstruct
    y = callable(*args)
  File "C:\Python24\lib\copy_reg.py", line 92, in __newobj__
    return cls.__new__(cls, *args)
TypeError: object.__new__(listiterator) is not safe, use listiterator.__new__()

So, I would like to know if there is a way to 'clone' a 'listiterator'
object. I know that is possible in Java for example...

If it is impossible, have you better ideas to find duplicate entries
in a list...

Thanks,

Cyril


From eppstein at ics.uci.edu  Sun Feb 20 12:59:21 2005
From: eppstein at ics.uci.edu (David Eppstein)
Date: Sun, 20 Feb 2005 09:59:21 -0800
Subject: exercise: partition a list by equivalence
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<1108814276.680736.264380@l41g2000cwc.googlegroups.com>
	<37pb5jF5fnfivU1@individual.net>
	<1108890925.941814.45860@g14g2000cwa.googlegroups.com>
	<1108895373.013257.192310@l41g2000cwc.googlegroups.com>
Message-ID: <eppstein-2D7D22.09592120022005@news.service.uci.edu>

In article <1108895373.013257.192310 at l41g2000cwc.googlegroups.com>,
 "John Machin" <sjmachin at lexicon.net> wrote:

> > it would be nice if the two working programs do not use some package.
> > This problem shouldn't need to.
> 
> Look at the newsgroup again. By my count there are apparently-working
> versions from SIX people: Reinhold, bear.+, Brian Beck, David Eppstein,
> yourself, and me. Only David's uses stuff that's not in the Python 2.4
> off-the-shelf distribution.

Where "stuff" means a single 62-line file that I linked to in my post.

-- 
David Eppstein
Computer Science Dept., Univ. of California, Irvine
http://www.ics.uci.edu/~eppstein/


From simoninusa2001 at yahoo.co.uk  Thu Feb 17 14:00:16 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 17 Feb 2005 11:00:16 -0800
Subject: Pausing a program - poll/sleep/threads?
In-Reply-To: <1119nf8qqj5gfbe@corp.supernews.com>
References: <1108625477.222091.34680@l41g2000cwc.googlegroups.com>
	<1119nf8qqj5gfbe@corp.supernews.com>
Message-ID: <1108666816.520517.91390@o13g2000cwo.googlegroups.com>

Hmm, yes I had thought of looking around PyQt for a timer, forgot about
it though.

As far as querying the server every few seconds, it does make sense
(you don't miss events) and is the recommended way of doing things with
InetCtrl, but I'd prefer to save the bandwidth/server load than have
realtime status updates.

The status also updates whenever you send a command (like play/pause).

I'm really stuck on how to implement this now....



From tom.willis at gmail.com  Wed Feb 16 10:00:07 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Wed, 16 Feb 2005 10:00:07 -0500
Subject: low-end persistence strategies?
In-Reply-To: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
Message-ID: <b54d048905021607004ece04a4@mail.gmail.com>

Sounds like you want pickle or cpickle. 


On Tue, 15 Feb 2005 19:00:31 -0800 (PST), Paul Rubin
<"http://phr.cx"@nospam.invalid> wrote:
> I've started a few threads before on object persistence in medium to
> high end server apps.  This one is about low end apps, for example, a
> simple cgi on a personal web site that might get a dozen hits a day.
> The idea is you just want to keep a few pieces of data around that the
> cgi can update.
> 
> Immediately, typical strategies like using a MySQL database become too
> big a pain.  Any kind of compiled and installed 3rd party module (e.g.
> Metakit) is also too big a pain.  But there still has to be some kind
> of concurrency strategy, even if it's something like crude file
> locking, or else two people running the cgi simultaneously can wipe
> out the data store.  But you don't want crashing the app to leave a
> lock around if you can help it.
> 
> Anyway, something like dbm or shelve coupled with flock-style file
> locking and a version of dbmopen that automatically retries after 1
> second if the file is locked would do the job nicely, plus there could
> be a cleanup mechanism for detecting stale locks.
> 
> Is there a standard approach to something like that, or should I just
> code it the obvious way?
> 
> Thanks.
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
Thomas G. Willis
http://paperbackmusic.net


From mail.python.org at bdash.net.nz  Thu Feb 17 18:42:01 2005
From: mail.python.org at bdash.net.nz (Mark Rowe)
Date: Fri, 18 Feb 2005 12:42:01 +1300
Subject: msnp, friends list
In-Reply-To: <1108679723.100970.322170@c13g2000cwb.googlegroups.com>
References: <1108665091.090003.59630@c13g2000cwb.googlegroups.com>
	<mailman.2771.1108671855.22381.python-list@python.org>
	<1108679723.100970.322170@c13g2000cwb.googlegroups.com>
Message-ID: <5c88935652ad34ddd6b057a0014d39d0@bdash.net.nz>


On Feb 18, 2005, at 11:35 AM, jr wrote:

> Sorry, I guess what I meant to ask was the status of the friends in the
> friends list begin updated. Right now we have a friends list which is
> being populated with the correct users, but their status (online,
> offline) is never getting set. For some reason the events aren't being
> fired??

Ok, I've seen this problem before.  Basically, the MSN servers do not 
send state changes for your buddies if you change your status from 
offline -> online before you have retrieved your entire buddy list.  
There doesn't appear to be a way around that with msnp as it always 
changes your state after sign-in, and it fails to group the buddy list 
state into a single transaction so that you can tell when the entire 
list has been retrieved...  It should be relatively simple to adapt the 
code to fix the problem.

Regards,

Mark Rowe
<http://bdash.net.nz/>



From deetsNOSPAM at web.de  Wed Feb 16 08:48:40 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 16 Feb 2005 14:48:40 +0100
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
Message-ID: <37h194F50j4pkU1@individual.net>


Maybe ZODB helps. 


-- 
Regards,

Diez B. Roggisch


From jeremy+plusnews at jeremysanders.net  Wed Feb 16 08:56:16 2005
From: jeremy+plusnews at jeremysanders.net (Jeremy Sanders)
Date: Wed, 16 Feb 2005 13:56:16 +0000
Subject: supress creation of .pyc files
References: <pan.2005.02.16.13.53.22.459631@thomas-guettler.de>
Message-ID: <pan.2005.02.16.13.56.16.269171@jeremysanders.net>

On Wed, 16 Feb 2005 14:53:22 +0100, Thomas Guettler wrote:

> The imported file is a config file, not a script.

You could use execfile() to read the file, and not import.

Jeremy



From vibroverb at hotmail.com  Wed Feb 23 09:19:43 2005
From: vibroverb at hotmail.com (Deltones)
Date: 23 Feb 2005 06:19:43 -0800
Subject: Sizers VS window size
References: <e0f0f902.0502220837.16a22ead@posting.google.com>
	<slrnd1mp6p.t0p.bhv1@pa-steclge-u3-c3b-133.stcgpa.adelphia.net>
Message-ID: <e0f0f902.0502230619.5d7e3aae@posting.google.com>

Brian Victor <bhv1 at psu.edu> wrote in message news:<slrnd1mp6p.t0p.bhv1 at pa-steclge-u3-c3b-133.stcgpa.adelphia.net>...
> Deltones wrote:
> > However, if I add this part from the tutorial, I get a much smaller
> > window. Why is there an interference with the result I want when
> > adding the sizer code?
> [snip]
> > self.sizer.Fit(self)
> 
> As noted in the the docs for Fit(): "Tell the sizer to resize the window
> to match the sizer's minimal size."  Take this call out and the size
> should be as you expect.

Thanks Brian, that was it. I admit I'm having quite a lot of fun
learning the Python/wxPython combo, but man is there a lot of concepts
to grasp!

Denis


From smitty_one_each at bigfoot.com  Wed Feb  2 06:43:08 2005
From: smitty_one_each at bigfoot.com (Chris Smith)
Date: Wed, 02 Feb 2005 06:43:08 -0500
Subject: [perl-python] string pattern matching
References: <1107290707.549792.199860@c13g2000cwb.googlegroups.com>
	<mailman.1716.1107300060.22381.python-list@python.org>
	<2uWdnWyp5M1Fip3fRVn-sQ@rogers.com>
	<mailman.1717.1107302883.22381.python-list@python.org>
	<usm4fbt55.fsf@bigfoot.com>
	<mailman.1720.1107311151.22381.python-list@python.org>
Message-ID: <uekfzjigj.fsf@bigfoot.com>

>>>>> Stephen Thorne <stephen.thorne at gmail.com> writes:

    > On Tue, 01 Feb 2005 21:19:34 -0500, Chris Smith
    > <smitty_one_each at bigfoot.com> wrote:
    >> Falls into the 'cure worse than the disease' category.  It's
    >> really just a prompt to explore the corners of Gnus, and
    >> determine how to give X.L. the thorough ignoring he deserves.

    > *headdesk*

    > I'm using gmail, and I can set up the filter trivially
    > (from:xah at xahlee.org -> delete), but I just wasn't thinking
    > clearly. I was cursing not having the ability to use a procmail
    > filter while the solution was right in front of me.

    > Regards, Stephen.

There, there, friend; we've all reached for the Big, Fancy Hammer
(BFH) when there was a lazier way to do it. ;)
Best,
Chris


From franz.steinhaeusler at utanet.at  Thu Feb 24 08:17:31 2005
From: franz.steinhaeusler at utanet.at (Franz Steinhaeusler)
Date: Thu, 24 Feb 2005 14:17:31 +0100
Subject: wanted: C++ parser written in Python
Message-ID: <mukr11t39khpd8od53im9jic3s6qjcl3j2@4ax.com>

Hello NG,

has anyone written such a thing in python?
Where could I look for?

(I need it for an editor written in wxPython to display function names, 
include, global variables, classes, ... in a sidepanel).

kind regards,
-- 
Franz Steinhaeusler


From tjreedy at udel.edu  Fri Feb 25 12:47:18 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 25 Feb 2005 12:47:18 -0500
Subject: accessor/mutator functions
References: <1109315698.002207.245690@g14g2000cwa.googlegroups.com>
Message-ID: <cvno3g$i5u$1@sea.gmane.org>


<mirandacascade at yahoo.com> wrote in message 
news:1109315698.002207.245690 at g14g2000cwa.googlegroups.com...
> When I look at how classes are set up in other languages (e.g. C++), I
> often observe the following patterns:
> 1) for each data member, the class will have an accessor member
> function (a Get<whatever> function)
> 2) for each data member, the class will have a mutator member function
> (a Set<whatver> function)
> 3) data members are never referenced directly; they are always
> referenced with the accessor and mutator functions
>
> My questions are:
> a) Are the three things above considered pythonic?

As others have said, 'no', as in 'unnecessary because we have a better way 
to accomplish the same purpose without doubling the attribute namespace'. 
The purpose of the pattern is to hide the specific implementation of a 
class (which attributes are static and which dynamic) and to allow that 
implementation to change without changing programs that use the class. 
Consider a complex class with interdependent .real, .imag, .rad, and .theta 
attributes and the possible  behind-the-scene implementations for what is 
kept static and how they are kept synchronized.  The need for get/set to 
accomplish this in C++ arises from the fact that attribute names are 
resolved at compile time, so that x.a syntax can only be used for simple 
static attributes and access.  Python, on the other hand, has means to 
'magically' map what looks like direct attribute access into a function 
call.  First there was __get/setattr__ (which is awkward for multiple 
dynamic attributes) and now properties with get/set/del for individual 
dynamic attributes.

> b) What are the tradeoffs of using getattr() and setattr() rather than
> creating accessor and mutator functions for each data member?
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 





From mike at maibaum.org  Fri Feb 25 09:39:00 2005
From: mike at maibaum.org (Michael Maibaum)
Date: Fri, 25 Feb 2005 14:39:00 +0000
Subject: split a directory string into a list
In-Reply-To: <4D97153E7D88F44FB6B534C661EE42900300A89C@medexch1.medplus.com>
References: <4D97153E7D88F44FB6B534C661EE42900300A89C@medexch1.medplus.com>
Message-ID: <FCBF2B90-873A-11D9-8434-000A95BA5F0A@maibaum.org>


On 25 Feb 2005, at 14:09, Harper, Gina wrote:

> I would start with something like this:
> somestring = '/foo/bar/beer/sex/cigarettes/drugs/alcohol/'
> somelist = somestring.split('/')
> print somelist

However - this will not work on Windows. It'd work on all the OS I 
usually use though ;)



Michael



From steve at holdenweb.com  Mon Feb 28 12:40:18 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 28 Feb 2005 11:40:18 -0600
Subject: bsddb for k, v in db.items(): do order the numbers ?
In-Reply-To: <mailman.3142.1109609327.22381.python-list@python.org>
References: <1109608259.047662.256140@z14g2000cwz.googlegroups.com>
	<mailman.3142.1109609327.22381.python-list@python.org>
Message-ID: <PHIUd.36579$%U2.21292@lakeread01>

Christopher De Vries wrote:

> On Mon, Feb 28, 2005 at 08:30:59AM -0800, martijn at gamecreators.nl wrote:
> 
>>WHen I use the code below and printing all the results i get this:
>>------
>>0 1 10
>>11 2 3
>>4 5 6
>>7 8 9
>>------
>>But I want
>>------
>>0 1 2
>>3 4 5
>>6 7 8
>>9 10 11
>>------
> 
> 
> If you want your key, value pairs in a certain order you have to sort them
> yourself. Dictionaries and bsddb keys are unsorted.
> 

Remember, also, that the keys are strings, so you'll need to convert 
them to numbers if you want them to sort numerically - otherwise "11" 
will come before "2".

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From crankycoder at gmail.com  Fri Feb 25 09:46:08 2005
From: crankycoder at gmail.com (Victor Ng)
Date: Fri, 25 Feb 2005 09:46:08 -0500
Subject: Is there way to determine which class a method is bound to?
Message-ID: <a8bfd74c05022506466cd6d3fc@mail.gmail.com>

I'm doing some evil things in Python and I would find it useful to
determine which class a method is bound to when I'm given a method
pointer.

For example:

class Foo(object):
    def somemeth(self):
        return 42

class Bar(Foo):
    def othermethod(self):
        return 42


Is there some way I can have something like :
  
   findClass(Bar.somemeth) 

that would return the 'Foo' class, and 

   findClass(Bar.othermethod)

would return the 'Bar' class?

vic


From sandeep.sandy at gmail.com  Wed Feb  9 08:07:52 2005
From: sandeep.sandy at gmail.com (sandy)
Date: 9 Feb 2005 05:07:52 -0800
Subject: Performance Issues of MySQL with Python
Message-ID: <1107954472.246556.258030@g14g2000cwa.googlegroups.com>

Hi All,

I am a newbie to MySQL and Python. At the first place, I would like to
know what are the general performance issues (if any) of using MySQL
with Python.

By performance, I wanted to know how will the speed be, what is the
memory overhead involved, etc during database specific operations
(retrieval, update, insert, etc) when MySQL is used with Python.

Any solutions to overcome these issues (again, if any)?

Thanks and Regards,
Sandeep



From tzot at sil-tec.gr  Fri Feb 25 03:54:27 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Fri, 25 Feb 2005 10:54:27 +0200
Subject: duplicate file finder
References: <cveqr1$a47$1@mughi.cs.ubc.ca>
	<nftl11tfimccjktktnj7oohbcvkfcjpe7f@4ax.com>
	<cvhjvj$142$1@mughi.cs.ubc.ca>
	<3vvr11dvtbu030065pj9ptmj1i2eelodq8@4ax.com>
	<cvlo5j$df4$1@mughi.cs.ubc.ca>
Message-ID: <pdpt115bsphehtaq34hrf0stilcgeja4pc@4ax.com>

On Thu, 24 Feb 2005 15:32:03 -0800, rumours say that Lowell Kirsh
<lkirsh at cs.ubc.ca> might have written:

>It looks pretty good, but I'll have to take a better look later. Out of 
>curiosity, why did you convert the first spaces to pipes rather than add 
>the code as an attachment?

(As you probably noticed, the pipes ended up as dots in the final version, but I
forgot to change the text.)

I considered the code to be small enough to leave it in the message.  And using
some non-space character at the start of every line (usually dots) is common use
lately in the group.  Even if one doesn't use vi for editing, it's easiest with
Idle to remove the dot at the start of every line.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From fuzzyman at gmail.com  Fri Feb 11 04:58:51 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 11 Feb 2005 01:58:51 -0800
Subject: PyINI : Cross-Platform INI parser
In-Reply-To: <3f_Od.26957$QG6.468964@twister2.libero.it>
References: <cuhiak$2gl8$1@mail.cn99.com>
	<3f_Od.26957$QG6.468964@twister2.libero.it>
Message-ID: <1108115931.429635.101290@f14g2000cwb.googlegroups.com>


Giovanni Bajo wrote:
> SeSe wrote:
>
> > hi, every one,
> >
> > I started a opensource project PyINI for corss-platform *.ini
parsing
> > at http://sourceforge.net/projects/pyini/
> >
> > I have released a simple alpha version, which can read *.ini, with
> > some extended features such as "key=value1,value2,value3". I also
> > made a c++ binding to PyINI with elmer toolkit.
>
>
> The most useful feature would be to be able to write INI files back
without
> affecting their formatting, without removing user commands, etc. This
is what
> Windows APIs do, and it is what I am missing from most INI parsing
libraries
> out there.
> --
> Giovanni Bajo

ConfigObj easily writes back, files but doesn't *yet* support the full
'ini' file spec (empty values and split lines it doesn't yet support).
These are targetted for next release.

What aspects of formatting do you want to keep, and I'll try and
include them ?

http://www.voidspace.org.uk/python/configobj.html

Regards,


Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From gdamjan at gmail.com  Mon Feb  7 16:18:22 2005
From: gdamjan at gmail.com (Damjan)
Date: Mon, 07 Feb 2005 22:18:22 +0100
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
Message-ID: <36q48uF55o5c6U1@individual.net>

> For all you GUI developers, things just got a little more interesting.
> Trolltech will soon be offering the QT GUI toolkit for Windows under
> the GPL license.  That means that PyQt may become a much more popular
> option in the near future.  

This  applies to QT-4 only. 
I wonder how much of PyQT is ready for QT4?

Anyway its time for a PyQT based VB-killer [ a GPL one :) ].


-- 
damjan


From tim.peters at gmail.com  Tue Feb 15 14:39:53 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Tue, 15 Feb 2005 14:39:53 -0500
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cut31n$bur$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr> <curb3t$67k$3@usenet.otenet.gr>
	<mailman.2599.1108429568.22381.python-list@python.org>
	<cut31n$bur$1@usenet.otenet.gr>
Message-ID: <1f7befae050215113977b1506a@mail.gmail.com>

[Tim Peters]
>> Well, I'm a Director of the Python Software Foundation, and my view is
>> "the more platforms the merrier".

[Ilias Lazaridis]
> I extract: "you are intrested, that the source-code-base compiles
> directly with MinGW (and other compilers)".

Sure, I'm in favor of that.  I'm also in favor of world peace, for
that matter <wink>.

> Thus you should be intrested, that existent patches are incorporated
> into the source-code-base.

That one doesn't follow.  It follows that I'd like to see existing
patches _reviewed_, but not necessarily that I'd be in favor of
incorporating them if I had time to review them myself.

> The suggested process ist: use of #defines whenever possible, to avoid
> influence on the existent behaviour of the code.

Patches are reviewed on technical merit, balancing the tradeoffs;
#defines are actually discouraged when it's possible to do a thing
without introducing platform-specific #ifdefs.  A problem is that a
patch won't get reviewed unless a volunteer does a review, and we've
got an increasing backlog of unreviewed patches because of that.  The
most effective way for a person P to get their patch reviewed now is
for P to volunteer to review 5 other patches first.  There are a few
Python developers who have promised, in return, to review P's patch
then.

>> But I'm not paid to work on Python, and I don't have time to
volunteer to help
>> MinGW along, so I don't anticipate that I'll do anything here beyond writing
>> this reply.
 
> You have done already very much.
>
> But should should take some time to evaluate community needs.

I don't know what that means, but plausible meanings sound futile.  No
matter what I think "the community" needs, it's not going to happen
unless somebody else does the work:  I can't tell anyone else what to
do.  Heck, I don't even want to.

It sounds like you might want development driven by some kind of
marketing study.  Nothing wrong with that, if so, but it's not how
open source works.  An entity like the Python Business Forum would
presumably be more open to that tack (although I doubt the PBF would
have a natural interest in MinGW).

"Minority platforms" generally don't get far unless a truly dedicated
volunteer shows up.  For example, Jason Tishler does an excellent job
on Python's Cygwin port, as does Andrew MacIntyre on OS/2 EMX, and
they've both done so for years.  Nobody asked them to do this (AFAIK),
it's more that nobody could _stop_ them from doing it. They're
motivated by love of the platforms they take care of.  In the absence
of anyone willing to pay someone else here, that's what's truly
needed.

> ...
> This effort could be driven by the intrested community members (which
> obviously exist).

Then maybe they need to be better organized, and/or more assertive in
pushing their interests.  If someone is getting left behind here, they
should speak up on the python-dev list.

...
> Now, can you please tell me the process I have to follow to suggest the
> following (to the PSF or to the programmers or to the decision takers),
> possibly to get at least a vote on it:

No such thing will happen -- forget that.  For MinGW to be supported
forever, it's necessary and sufficient that a specific person
volunteer to support MinGW forever.  If that person goes away, so does
the support they provided; it's the same story for Cygwin, and even
for Linux and native Windows.  A difference is that Linux and native
Windows attract more than enough volunteers so that ongoing support
seems statistically certain.  But, e.g., if Andrew MacIntyre went
away, I wouldn't bet on OS/2 EMX support continuing.

> "Please ensure that the source-code-base compliles directly with MinGW.
> The suggested process is to:
> 
>   * provide the infrastructure
>     (e.g. mailinglist, issue- tracking-category,... )
> 
>   * Notify the community about this subproject to channelise efforts
> 
>   * include existing MinGW specific patches
> 
>   * ensure future verificatioin of changes,
>     * optimal:    due to an automated build-system
>     * or simpler: due to community-feedback
> "

If a specific person or group wants to volunteer to do all that, year
after year, they can start doing it today.  The PSF won't do any of it
(although the PSF will fund and arrange to run the Python website, and
one way or another supply a bug tracker, source-control system, and
other infrastructure for keeping the Python project as a whole
running).


From harlinseritt at yahoo.com  Sat Feb 26 03:48:43 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 26 Feb 2005 00:48:43 -0800
Subject: Yet another logo design...
In-Reply-To: <mailman.3077.1109387995.22381.python-list@python.org>
References: <6c9897c2.0502251551.2b8feb@posting.google.com>
	<mailman.3077.1109387995.22381.python-list@python.org>
Message-ID: <1109407723.289500.118050@o13g2000cwo.googlegroups.com>

I like the type logo (on the right of the image). The black snake-like
image can be cropped though. :-)

Harlin



From irmen.NOSPAM at xs4all.nl  Sat Feb 12 14:55:44 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sat, 12 Feb 2005 20:55:44 +0100
Subject: ANN: pyMinGW support for Python 2.3.5 (final) is available
In-Reply-To: <1108237204.920670.213190@f14g2000cwb.googlegroups.com>
References: <1108189500.707806.316520@g14g2000cwa.googlegroups.com>
	<slrnd0rmep.n4l.nick@irishsea.home.craig-wood.com>
	<1108237204.920670.213190@f14g2000cwb.googlegroups.com>
Message-ID: <420e5ef3$0$28979$e4fe514c@news.xs4all.nl>

Simon John wrote:

> Maybe I'll fork out the 100usd for Visual Studio .NET 2003 after all....

$100? Where? Last time I looked it was closer to $800.
--Irmen


From __peter__ at web.de  Fri Feb 18 12:36:10 2005
From: __peter__ at web.de (Peter Otten)
Date: Fri, 18 Feb 2005 18:36:10 +0100
Subject: Newbie CGI problem
References: <mailman.2809.1108746657.22381.python-list@python.org>
Message-ID: <cv5920$frm$05$1@news.t-online.com>

Rory Campbell-Lange wrote:

> #!/usr/bin/python
> import cgi
> print "Content-type: text/html\n\n"
> print "hi"
> 
> Gives me the following in my browser:
> 
> '''
> hi
> Content-type: text/html
> 
> 
> hi
> '''
> 
> Why are there two 'hi's?

You have chosen a bad name for your script: cgi.py.
It is now self-importing. Rename it to something that doesn't clash with the
standard library, and all should be OK.

Peter




From __peter__ at web.de  Thu Feb  3 06:32:00 2005
From: __peter__ at web.de (Peter Otten)
Date: Thu, 03 Feb 2005 12:32:00 +0100
Subject: SUCCESS!
References: <41f6c3f7$1@nntp.zianet.com> <ct7r4u$ce6$1@swifty.westend.com>
	<41f85dd8@nntp.zianet.com> <cta7hk$g9b$03$1@news.t-online.com>
	<41f97058$1@nntp.zianet.com> <ctcstl$1vn$05$1@news.t-online.com>
	<41faee43$1@nntp.zianet.com>
Message-ID: <ctt1vp$9j2$02$1@news.t-online.com>

Erik Johnson wrote:

> I installed readline-devel. (Thank you for re-asking that question.)

I had that hunch :-)
 
> Interestingly, configure *still* says...
> ej at sand:~/Python-2.3.4> ./configure | grep readline
> checking for rl_pre_input_hook in -lreadline... no
> checking for rl_completion_matches in -lreadline... no

I get similar messages for Python 2.4 on Suse 9.1, but the history *does*
work by default. Maybe if you start with a newly unzipped copy and
do ./configure it will work for you, too? Pardon me for not digging deeper
into the gory details...

> Thanks again for your help! :)

You're welcome.

Peter



From VBoycheva at jea.net  Mon Feb  7 09:27:26 2005
From: VBoycheva at jea.net (Valentina Boycheva)
Date: Mon, 7 Feb 2005 09:27:26 -0500 
Subject: executing VBScript from Python and vice versa
Message-ID: <51B182D9911B914EA2243227834E86C005CB0760@jeamail.jea.net>

Thanks to Michel Claveau and Paul Paterson for providing examples on how to
use ScriptControl to embed VBScript in Python script. I've only tried this
once before on another occasion and it was fascinating to see how a function
generates another function!

Valentina 



From tjreedy at udel.edu  Fri Feb 25 13:26:58 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 25 Feb 2005 13:26:58 -0500
Subject: strange SyntaxError
References: <20050225133355.GI20239@csola.ugyvitelszolgaltato.hu>
Message-ID: <cvnqdr$q08$1@sea.gmane.org>


"Attila Szabo" <trial at ugyvitelszolgaltato.hu> wrote in message 
news:20050225133355.GI20239 at csola.ugyvitelszolgaltato.hu...
> Hi,
>
> I wrote this sample piece of code:
>
> def main():
>        lambda x: 'ABC%s' % str(x)
>        for k in range(2): exec('print %s' % k)
>
> main()
>
> With the lambda line, I get this:
> SyntaxError: unqualified exec is not allowed in function 'main'
> it contains a nested function with free variables

The lambda expression is the nested function, the free variable is 'str'.
Since this general situation *could* be a problem, as Scott explained,
the compiler quits, since it cannot do the analysis needed to determine
whether the specific situation *is* a problem.

Terry J. Reedy







From jaydonnell at gmail.com  Wed Feb 16 14:03:21 2005
From: jaydonnell at gmail.com (jdonnell)
Date: 16 Feb 2005 11:03:21 -0800
Subject: web spider and password protected pages
Message-ID: <1108580601.884193.263890@g14g2000cwa.googlegroups.com>

I've been writing a simple web spider for fun, and I've run into a
problem I can't figure out. The spider hangs (waits for username and
pass) when I hit a page that requires .htaccess authentication.

self.f = urllib.urlopen('http://blogbloc.com/~jay/test/')
#nothing below here gets executed
print self.f.info()
...

It hangs as soon as I call urllib.urlopen(). I was going to try to read
the info and break for pages that require authentication, but it hangs
before I can call self.f.info()

Any ideas?



From sjmachin at lexicon.net  Sun Feb 20 03:52:46 2005
From: sjmachin at lexicon.net (John Machin)
Date: 20 Feb 2005 00:52:46 -0800
Subject: newbie question - exception processing
References: <1108883612.511033.154920@o13g2000cwo.googlegroups.com>
Message-ID: <1108889566.821032.155660@f14g2000cwb.googlegroups.com>


mirandacascade at yahoo.com wrote:
> O/S: Windows XP Service Pack 2
> Python version: 2.4
>
> Unable to understand how to build a class to handle an exception.
>
> Contents of sample01.py:
> import exceptions
> class SampleMain:
>     try:
>         def __init__(self):
>             print 'in SampleMain constructor'
>
>         def Allowed(self):
>             print 'in allowed'
>
>         def NotYetAllowed(self):
>             UCError = UnderConstructionError('not yet ready')
>             raise UCError
>
>     except UnderConstructionError, e:
>         print e.msg
>
> class Error(exceptions.Exception):
>     def __init__(self):
>         print 'in base class constructor'
>
> class UnderConstructionError(Error):
>     def __init__(self, message):
>         print 'in UnderConstructionError constructor'
>         self.msg = message

!     def __str__(self):
!         return self.msg

>
> Copy/paste of interactive window:
> PythonWin 2.4 (#60, Nov 30 2004, 09:34:21) [MSC v.1310 32 bit
(Intel)]
> on win32.
> Portions Copyright 1994-2004 Mark Hammond (mhammond at skippinet.com.au)
-
> see 'Help/About PythonWin' for further copyright information.
> >>> import sample01
> >>> x = sample01.SampleMain()
> in SampleMain constructor
> >>> x.NotYetAllowed()
> in UnderConstructionError constructor
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
>   File "C:\Python24\sample01.py", line 12, in NotYetAllowed
>     raise UCError
> UnderConstructionError: <unprintable instance object>
> >>>
>
> My questions are:
> 1) What is causing the error described in the Traceback?

The text <unprintable instance object> was printed because there was no
mechanism to print the error object.

> 2) Given that what I want to happen when the NotYetAllowed() method
is
> called is:
>     a) an exception to be raised

Happening already.

>     b) the exception results in a message getting printed; the
message
> should come from the place where the exception was raised, and it
> should be passed to the exception class as a string object; so in
this
> case the message that should be printed is 'not yet ready'

Insert __str__ method as per above.

>     c) the exception gets handled with the try/except within the
> SampleMain class
>

Now that would be difficult. That 'try' statement is executed when the
class is *loaded*. Put a print statement just before the try statement
and you'll see what I mean. It's not a declaration that encompasses all
 calls to methods of instances of the class.

Let's take a step back: Why do you think you need to catch and *handle*
such exceptions? You have some methods that aren't fit to be seen in
public yet? Don't tell anyone about them. Don't put your code in a
callable place. Alternatively, put "raise NotImplementedError" --
that's a standard built-in exception -- as the first line of each
method. A bit of explanation from you might be useful so that the help
can be tailored.

And if all you really want to do is just print a message, that's what
happens by default e.g.

>>> raise NotImplementedError, 'come back after lunch'
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
NotImplementedError: come back after lunch
>>> class Mistake(Exception):
...    pass
...
>>> def foo():
...    raise Mistake, 'somebody goofed'
...
>>> foo()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 2, in foo
__main__.Mistake: somebody goofed
>>>


HTH,
John



From sandip at lug-delhi.org  Sat Feb 12 05:16:58 2005
From: sandip at lug-delhi.org (Sandip Bhattacharya)
Date: Sat, 12 Feb 2005 15:16:58 +0500
Subject: Unittesting for web applications
Message-ID: <pan.2005.02.12.10.16.57.326426@lug-delhi.org>

Can someone suggest me some good resources for learning how to use
unittests for web applications? Do we always have to cook up our own
webpage scrapers to test the code?

- Sandip

-- 
Sandip Bhattacharya    *    Puroga Technologies   *     sandip at puroga.com
Work: http://www.puroga.com   *    Home/Blog: http://www.sandipb.net/blog

PGP/GPG Signature: 51A4 6C57 4BC6 8C82 6A65 AE78 B1A1 2280 A129 0FF3





From akineko at pacbell.net  Wed Feb 16 13:51:27 2005
From: akineko at pacbell.net (Aki Niimura)
Date: 16 Feb 2005 10:51:27 -0800
Subject: Pmw.Balloon under Windows
Message-ID: <1108579886.983146.56130@z14g2000cwz.googlegroups.com>

Hello everyone,

I'm encountering a weird problem and couldn't find any Internet
postings
that are relevant to my problem and it seems coming from the Pmw
Balloon
widget inside.

I have developed a Tkinter software using Pmw.
The software is being developed under Solaris but is targeting all
platforms
including Windows.

The software is working fine under Solaris 9.
However, when I tried it under Windows, it worked also fine but it spit
out
the following error message when exiting.

(from cygwin terminal)

% c:/Python23/python my_app.py

This application has requested the Runtime to terminate it in an
unusual way.
Please contact the application's support team for more information.

(the same error message is observed when I run the program directly in
Windows XP environment.)
//

First, I thought I screwed up something because it was working fine
before
with my older software version.

After painful investigation, I found Pmw.Balloon was causing this
problem
(because the problem went away if I commented out all balloon
statements).

Then I compared my usages and Pmw Balloon example because the example
didn't
cause this. (http://pmw.sourceforge.net/doc/Balloon.html)

But I didn't see any problem in my coding.

//

Then I found two clues:
(1) The problem won't occur if I quit the program by clicking 'X' of
the Window decoration. (not from Quit in the Menu)

(2) The Pmw Balloon example has the exact same problem *if*
I change the program to quit using widget quit() method.

        self.suicide = Tkinter.Button(frame, text='Kill me soon!',
            command = parent.quit)           # this causes the problem
#            command = self.killButton)      # The original one

Of course, the problem is occurring only under Windows. (Windows
XP/Cygwin)

//

My questions are:
(1) Why my program is complaining and is there any workaround?

(2) What is the difference between using widget quit() method
and using Windows 'X' button.
- I know clicking Windows 'X' button generates an event but I thought
- ultimately it reached to the same routine to terminate the program.

(3) Is it possible to fake clicking 'X' button?
I see a widget has event_generate() method.

//

Any feedbacks, comments are highly appreciated.
It would be nice if you can send your reply to <akineko at pacbell.net> .

Thank you for your attention.

Best regards,
Aki Niimura



From ilias at lazaridis.com  Fri Feb 18 14:29:44 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Fri, 18 Feb 2005 21:29:44 +0200
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2815.1108754385.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr><cupupa$kfs$2@usenet.otenet.gr>	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>	<1108411893.940158.270090@c13g2000cwb.googlegroups.com>	<42163065.8070708@lazaridis.com>
	<mailman.2815.1108754385.22381.python-list@python.org>
Message-ID: <cv5fnc$ll9$1@usenet.otenet.gr>

Josef Meile wrote:
> It looks like here the only worth words are yours. Didn't
> you close this thread?

yes, but when reviewing again I found this lack [created by myself due 
to private conversation].

> I will refresh your mind with your own unpolite way:

I find this very polite [to notify conversation partners instead of 
letting them wait for an answer].

> """
> Ilias Lazaridis wrote:
> [...]
> 
> closing thread
> http://groups-beta.google.com/group/comp.lang.python/msg/f2ae9cdbe16676d1
> """
> 
> Anyway, I will add some comments:
[...]

The first step is to make a pyMinGW project.

If one is intrested, he has possibly more luck [than I had] to convince 
the author of pyMinGW.

Good luck.

.

-- 
http://lazaridis.com


From fitzgeraldsteele at gmail.com  Wed Feb 23 08:09:30 2005
From: fitzgeraldsteele at gmail.com (Fitzgerald  Steele)
Date: 23 Feb 2005 05:09:30 -0800
Subject: File/Directory hacks - is there a better way to do this?
Message-ID: <1109164170.566047.206390@z14g2000cwz.googlegroups.com>

I had a software package screw up a directory tree by placing all the
files in a directory of the same name.  So I wound up with:

Root
  file1.txt (dir)
     file1.txt (file)

  file2.txt (dir)
     file2.txt (file)

Annoying.  So I wrote the following script, which fixed the problem by
renaming and copying the file up to the root directory, removing the
intermediate directory, and finally restoring the orginal file name.

Is there a better (faster, or fewer lines of code, or more
'python-esque') way to do?  In particular, I know the latest versions
of python includes iterators, generators, and decorators...but I
haven't had a chance to really read about them, or understand how to
use them properly.  So I'd love to hear if the new tools could've
solved this simpler/faster.

Thanks!

------------------------------------------------------

#!/user/bin/env python

import os, os.path, shutil

top = 'c:\$user'

class fixdirectories:
    def __init__(self, top):
        self.top = top

    def walk(self):
        for root, dirs, files in os.walk(self.top, topdown=False):
            rootdir, roottail = os.path.split(root)
            for name in files:
                if name.lower() == roottail:

                    oldname = os.path.join(root, name)
                    tmpname = os.path.join(rootdir, "PRE-" + name)
                    newname = os.path.join(rootdir, name)

                    shutil.move(oldname, tmpname)
                    try:
                        os.rmdir(root)
                        print "removing: " + rootdir
                        shutil.move(tmpname, newname)
                    except:
                        print "Could not remove: " + root

if __name__ == "__main__":
    f = fixdirectories(top)
    f.walk()



From ilias at lazaridis.com  Mon Feb 14 14:14:14 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Mon, 14 Feb 2005 21:14:14 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <4210c5c3$0$41647$a1866201@visi.com>
References: <cuo71l$gig$1@usenet.otenet.gr> <cup249$svu$1@gemini.csx.cam.ac.uk>
	<cupqb6$1oi$1@usenet.otenet.gr> <cups17$kbs$1@gemini.csx.cam.ac.uk>
	<cupvmh$os2$1@usenet.otenet.gr>
	<mailman.2520.1108379101.22381.python-list@python.org>
	<cuq32h$a3e$1@usenet.otenet.gr>
	<4210c5c3$0$41647$a1866201@visi.com>
Message-ID: <cuqta4$4c1$2@usenet.otenet.gr>

Grant Edwards wrote:
> On 2005-02-14, Ilias Lazaridis <ilias at lazaridis.com> wrote:
> 
>>Fredrik Lundh wrote:
>>
>>>Ilias Lazaridis wrote
>>>
>>>>The idea that the Python Foundation cares about user needs would affect that.
>>>
>>>please let the users speak for themselves.
>>
>>I have.
>>
>>I've review several threads,publications, actions etc., that show that 
>>the users have this need.
> 
> This is open source.  You don't just order somebody else to do
> what you want. You _do_ it and donate it to the community.

I analyze the current situation.

The is the fundamentall step before doing anything.

But the reaction of this community raises some questions and my curiosity.

>>please review the initial thread with care, i've pointed to
>>some documents/thread.
> 
> So what?  You want it, you do it.

I like to synchronize any efforts with the existing ones.

That's why I ask some questions.

nothing special.

.

-- 
http://lazaridis.com


From apardon at forel.vub.ac.be  Mon Feb  7 09:53:49 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 7 Feb 2005 14:53:49 GMT
Subject: Confused with methods
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>
	<slrnd0enor.26q.apardon@rcpc42.vub.ac.be>
	<1grmd4z.1tlm4e61650vedN%aleaxit@yahoo.com>
Message-ID: <slrnd0f07t.26q.apardon@rcpc42.vub.ac.be>

Op 2005-02-07, Alex Martelli schreef <aleaxit at yahoo.com>:
> Antoon Pardon <apardon at forel.vub.ac.be> wrote:
>
>> Op 2005-02-06, Alex Martelli schreef <aleaxit at yahoo.com>:
>> >  
>> >> Isn't that inconsistent?
>> >
>> > That Python has many callable types, not all of which are descriptors?
>> > I don't see any inconsistency there.  Sure, a more generalized currying
>> > (argument-prebinding) capability would be more powerful, but not more
>> > consistent (there's a PEP about that, I believe).
>> 
>> I think python is a bit inconsistent here, by using 'def' for
>> two different things.
>
> It doesn't.
>
>> I think it would have been more consistent
>> if def always produces a function
>
> It does.
>
> def g(self): pass
> class A(object):
>   f = g
>
> class B(object):
>   def f(self): pass
>
> class C(object): pass
> C.f = g
>
> class D(object):
>   f = B.f
>
> These four classes are essentially equivalent.  def always produces a
> function object and binds it to the name coming after keyword 'def'.
> Any such function object, no matter how produced and how bound hither
> and thither, always behaves in exactly the same way.
>
> You're free to like or dislike this arrangement, but calling it
> "inconsistent" is a madman's folly, as it is TOTALLY consistent.

Yes it is inconsistent with the rest of python. That you found
a subset in which it is consistent doesn't change that.

And what if you do:

  c = C()
  c.f = g


The fact that a function in a class performs a lot of magic if
it is called through an instance, that isn't performed otherwise,
makes python inconsistent here. You may like the arrangement
(and it isn't such a big deal IMO) but that doesn't make it consistent.

-- 
Antoon Pardon


From export at hope.cz  Sat Feb 26 02:36:59 2005
From: export at hope.cz (export at hope.cz)
Date: 25 Feb 2005 23:36:59 -0800
Subject: Watermark on images
Message-ID: <1109403419.904324.115860@f14g2000cwb.googlegroups.com>

Is there a way how to put a watermark on images by using Python?
Lad.



From ncoghlan at iinet.net.au  Thu Feb 24 06:15:09 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Thu, 24 Feb 2005 21:15:09 +1000
Subject: Compile time evaluation (aka eliminating default argument hacks)
Message-ID: <421DB73D.30407@iinet.net.au>

Time for another random syntax idea. . .

So, I was tinkering in the interactive interpreter, and came up with the 
following one-size-fits-most default argument hack:

Py> x = 1
Py> def _build_used():
...   y = x + 1
...   return x, y
...
Py> def f(_used = _build_used()):
...   x, y = _used
...   print x, y
...
Py> f()
1 2
Py> x = 3
Py> f()
1 2

Works pretty well in terms of getting early binding, compile-time evaluation of 
expensive values and psuedo-constants, initialising a local with a shadowed 
value from an outer scope, sharing mutable values between invocations, and well, 
really, anything that default argument hacks are used for. It has the benefit of 
allowing use of a full suite at compile time, instead of the expressions one is 
usually limited to in default arguments hacks. It also slightly improves the 
argspec pollution situation by only using one argument instead of several.

However, it's still ugly as sin, still pollutes the functions argspec, the lists 
of names in the assignment statement and the return statement have to be kept in 
sync manually, and you're now polluting the outer namespace as well. Not to 
mention the fact that the contents of the compile-time functions are miles away 
from where the results are used.

But consider a syntax like the following:

     def f():
         use x, y from:
             y = x + 1  # [1]
         print x, y

[1] I'll grant that the binding of x from the outer scope here is more than a 
little obscure. However, I could see 'use x from: pass' becoming an idiom for 
early binding, in which case the example 'use' block could be written:
     use y from: y = x + 1
     use x from: pass

Then mixing early binding with early evaluation in the same 'use' block might 
simply be considered bad style, and discouraged (although not prevented).

Essentially, the function is compiled as usual, and emits code at the location 
of the 'use' statement equivalent to that for "x, y = <const>". The relevant 
entry in co_consts is populated by executing the body of the 'use' statement 
with an implicit "return x, y" at the end. The environment for that execution is 
the same as that for any function defined at the same level as the containing 
scope of the 'use' statement (e.g. module level in the example).

Multiple 'use' blocks would be allowed in a scope. A 'use' block at module level 
would simply mean that the result of calling the block gets marshalled into the 
compiled module file, rather than the block itself.

You could get performance improvements on *any* function, simply by moving code 
which doesn't depend on the functions arguments inside a 'use' block. For 
modules, data structures initialised inside a using block could simply be 
unmarshalled rather than built anew.

Cheers,
Nick.

P.S. I didn't search the archive, because I couldn't figure out any search terms 
for the topic that weren't swamped by irrelevant hits.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From steven at lczmsoft.com  Mon Feb 28 19:50:18 2005
From: steven at lczmsoft.com (steven at lczmsoft.com)
Date: 28 Feb 2005 16:50:18 -0800
Subject: Hey, How Do I Distribute my New Completed Python Project?
In-Reply-To: <1109598508.839761.278740@f14g2000cwb.googlegroups.com>
References: <1109579904.014493.222540@o13g2000cwo.googlegroups.com>
	<1109598508.839761.278740@f14g2000cwb.googlegroups.com>
Message-ID: <1109638218.905448.159500@f14g2000cwb.googlegroups.com>

Thank You All



From ville at spammers.com  Thu Feb 10 06:55:51 2005
From: ville at spammers.com (Ville Vainio)
Date: 10 Feb 2005 13:55:51 +0200
Subject: That horrible regexp idiom
References: <mailman.2286.1108019460.22381.python-list@python.org>
Message-ID: <du71xbotyrc.fsf@lehtori.cc.tut.fi>

>>>>> "Stephen" == Stephen Thorne <stephen.thorne at gmail.com> writes:

    Stephen> We've all seen it before. Its a horrible idiom that you
    Stephen> would achieve in another language by doing:

    Stephen> if (m = foo_pattern.search(subject)) 
    Stephen> { }
    Stephen> else
    Stephen> { }

    Stephen> but it occured to me today, that it is possible to do it in python
    Stephen> without the extra line.
    Stephen> '
    Stephen> '>>> def xsearch(pattern, subject):
    Stephen> '>>>     yield pattern.search(subject)

    Stephen> '>>> for m in xsearch(foo_pattern, subject):
    Stephen> '>>>     pass
    Stephen> '>>> else:
    Stephen> '>>>     pass

    Stephen> simple, concise, requires no new syntax, and is only a
    Stephen> little confusing[1]!

I'm always confused by for-else (lack of practice), but isn't the else
clause going to be always executed when there is no break in the for
suite?

-- 
Ville Vainio   http://tinyurl.com/2prnb


From fredrik at pythonware.com  Mon Feb 14 11:58:19 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 17:58:19 +0100
Subject: Probel with socket "recv" function on Win2000
References: <8C22373EA650AF40928EEA0C188D62D201810286@xmb-ams-338.emea.cisco.com>
Message-ID: <cuql6a$3a1$1@sea.gmane.org>

Guy Machlev wrote:

> I have a problem with the socket recv() function while using it on
> win-2000, the problem accrue while receiving data from socket in a
> constant format (e.g. 1Byte then 4Bytes and then number of bytes
> according to the previous 4Bytes number), this receiving action "fail"
> after a bout ~120Kbytes of data the, actually the phenomena that accrue
> after reading this amount of data is a kind of data skipping which mean
> that the next recv is reading data start from ~121Kbytes I am losing
> data between the 120 and 121, this phenomena is consistently happened
> exactly at the same data point. I have tried to run the same script on
> Linux and there it went perfect.
>
> anyone has any idea way it happened ?

TCP or UDP?

are you checking the length of the buffers you get back from recv?

are you sure it's skipping and not just getting out of sync?

does replacing the recv() with read() on a socket stream (use makefile()
to create the stream) help?

</F> 





From eric_brunel at despammed.com  Mon Feb 14 06:35:03 2005
From: eric_brunel at despammed.com (Eric Brunel)
Date: Mon, 14 Feb 2005 12:35:03 +0100
Subject: Tkinter option_add for menu radiobutton
References: <hIOdnRP2Rei7SJLfRVn-1g@nmt.edu>
Message-ID: <opsl6qgpu1rqur0o@eb.pragmadev>

On Sun, 13 Feb 2005 15:31:18 -0700, Bob Greschke <bob at passcal.nmt.edu> wrote:
[snip]
> Root.option_add("*Radiobutton*selectColor", "black")
>
> also works fine for regular radiobuttons.  What I can't
> do is get the selectColor of the radiobutton's in the
> menu to be black...the x.add_radiobutton() ones.
>
> Root.option_add("*Menu.Radiobutton*selectColor", "black")...nope
> Root.option_add("*Menu*selectColor", "black")...no change

Strange... The last one works for me (as it should - see http://www.tcl.tk/man/tcl8.4/TkCmd/menu.htm). What platform are you on and what is your tcl/tk version?
  - Eric Brunel -


From raghulj at gmail.com  Mon Feb 21 22:49:11 2005
From: raghulj at gmail.com (Raghul)
Date: 21 Feb 2005 19:49:11 -0800
Subject: copying or moving the mail message using imaplib
Message-ID: <1109044151.869953.187270@c13g2000cwb.googlegroups.com>

Hi Friends,

            I am doing project in python.I am new to this. My problem
is I want to move the mail message to other folder in the mail using
imaplib (E.g) I want to move a message from the inbox to the Draft
folder in my account using python code. Can any one help me by giving a
sample code to do this?


Thanks in advance



From peter at engcorp.com  Thu Feb 24 20:59:10 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 24 Feb 2005 20:59:10 -0500
Subject: user interface for python
In-Reply-To: <86mztvf543.fsf@guru.mired.org>
References: <1109131790.140672.209730@l41g2000cwc.googlegroups.com>
	<pan.2005.02.23.09.45.55.878755@thomas-guettler.de>
	<421c9031$1@nntp0.pdx.net> <86mztvf543.fsf@guru.mired.org>
Message-ID: <u4udnagpJv_wG4PfRVn-tg@powergate.ca>

Mike Meyer wrote:
> "There are no portable programs, only ported programs."
> 
>        -- John Gilmore (?)

This doesn't really ring true, unless one insists on defining
"portable" to include the idea of "universally".

I've got dozens of Python utilities that run equally well
on my Linux machines and my Windows machines.  I didn't
"port" them, I just wrote them in Python and put them in
both places.

Maybe I'm missing the point of Gilmore's comment...

-Peter


From sjmachin at lexicon.net  Sat Feb 26 15:57:44 2005
From: sjmachin at lexicon.net (John Machin)
Date: 26 Feb 2005 12:57:44 -0800
Subject: fdups: calling for beta testers
In-Reply-To: <422044b9$1@news.vo.lu>
References: <421f97eb$1@news.vo.lu>
	<1109380525.262724.275780@g14g2000cwa.googlegroups.com>
	<422044b9$1@news.vo.lu>
Message-ID: <1109451464.546948.174830@z14g2000cwz.googlegroups.com>


Patrick Useldinger wrote:
> John Machin wrote:
>
> > (1) It's actually .bz2, not .bz (2) Why annoy people with the
> > not-widely-known bzip2 format just to save a few % of a 12KB file??
(3)
> > Typing that on Windows command line doesn't produce a useful result
(4)
> > Haven't you heard of distutils?
>
> (1) Typo, thanks for pointing it out
> (2)(3) In the Linux world, it is really popular. I suppose you are a
> Windows user, and I haven't given that much thought. The point was
not
> to save space, just to use the "standard" format. What would it be
for
> Windows - zip?

Yes. Moreover, "WinZip", the most popular archive-handler, doesn't grok
bzip2.

> > (6) You are keeping open handles for all files of a given size --
have
> > you actually considered the possibility of an exception like this:
> > IOError: [Errno 24] Too many open files: 'foo509'
>
> (6) Not much I can do about this. In the beginning, all files of
equal
> size are potentially identical. I first need to read a chunk of each,

> and if I want to avoid opening & closing files all the time, I need
them
> open together.
> What would you suggest?

Test, like I did, to see how many open handles you can get away with. I
was not joking, 20 was the max on MS-DOS at one stage and I vaguely
recall: (a) some low limits on various flavours of *x (b) the "ulimit"
command can be used to vary the per-process limit but (c) there is a
system-wide limit also.

You should consider a fall-back method to be used in this case and in
the case of too many files for your 1Mb (default) buffer pool. BTW 1Mb
seems tiny; desktop PCs come with 512MB standard these days, and Bill
does leave a bit more than 1MB available for applications.

> > And what is "chown" -- any relation of Perl's "chomp"?
>
> chown is a Unix command to change the owner or the group of a file.
It
> has to do with controlling access to the file. It is not relevant on
> Windows. No relation to Perl's chomp.

The question was rhetorical. Your irony detector must be on the fritz.
:-)

> Did you actually run it on your
> Windows box?

Yes, with trepidation, after carefully reading the source. It detected
some highly plausible duplicates, which I haven't verified yet.

Cheers,
John



From peter at somewhere.com  Tue Feb 15 14:22:28 2005
From: peter at somewhere.com (Peter Maas)
Date: Tue, 15 Feb 2005 20:22:28 +0100
Subject: replacing ASP/VBScript with Python
In-Reply-To: <mailman.2639.1108490627.22381.python-list@python.org>
References: <mailman.2639.1108490627.22381.python-list@python.org>
Message-ID: <cuti4d$m78$1@swifty.westend.com>

Robert Brewer schrieb:
>>I'm now confident that it is doable and keen on finding out. The usual
>>question: what is the one and best way to do it? ;)
> 
> 
> Python ASP (pywin32), but put as little code as possible into the
> ASP--make it just a stub to call the real Python app. That app will be
> running persistently in the background, which should obviate most of the
> need for session support. That's been my experience, anyway.

Sounds reasonable. How do ASP-Python and IIS work together? Is the Python-
Interpreter loaded each time a Python-ASP is called?

> Here's an example (from
> http://www.aminus.org/rbre/cation/html/admin/ASP.html):
> 
> <%@Language=Python%>
> <%
> from cation.html.uiasp import UserInterfaceASP
> from cation import catapp
> 
> ui = UserInterfaceASP(catapp)
> ui.request(Request, Response)
> %>

That's interesting, thanks for the URL and your advice.

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From dalcolmo at vh-s.de  Fri Feb 11 07:57:47 2005
From: dalcolmo at vh-s.de (Josef Dalcolmo)
Date: 11 Feb 2005 13:57:47 +0100
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<4207c8db$0$21623$a1866201@visi.com>
	<cub12p$pke$1@achot.icm.edu.pl> <36sip2F56jjmaU1@individual.net>
Message-ID: <umzubw8xg.fsf@vh-s.de>


You can distribute GPL'ed code in binary form, you just have to make
the sources available as well.  And, yes I would use this as a test:
if your program needs gpl-ed code for some of it's functionality, you
have to licence your program according to the GPL - unless you
distribute the GPL'ed parts separately and your program is still
basically functioning without the GPL'ed code.

Now, if you are unsure about these questions and are serious about
writing a program using GPL'ed code, the FSF is probably willing to
help you with your questions.

Besides this, why not putting your code under the GPL? 

- Josef



From martin at v.loewis.de  Fri Feb 18 15:16:01 2005
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 18 Feb 2005 21:16:01 +0100
Subject: unicode encoding usablilty problem
In-Reply-To: <opsmekm2ei6yt6e7@news.cisco.com>
References: <opsmekm2ei6yt6e7@news.cisco.com>
Message-ID: <42164d01$0$4676$9b622d9e@news.freenet.de>

aurora wrote:
> The Java 
> has a much more  usable model with unicode used internally and 
> encoding/decoding decision  only need twice when dealing with input and 
> output.

In addition to Fredrik's comment (that you should use the same model
in Python) and Walter's comment (that you can enforce it by setting
the default encoding to "undefined"), I'd like to point out the
historical reason: Python predates Unicode, so the byte string type
has many convenience operations that you would only expect of
a character string.

We have come up with a transition strategy, allowing existing
libraries to widen their support from byte strings to character
strings. This isn't a simple task, so many libraries still expect
and return byte strings, when they should process character strings.
Instead of breaking the libraries right away, we have defined
a transitional mechanism, which allows to add Unicode support
to libraries as the need arises. This transition is still in
progress.

Eventually, the primary string type should be the Unicode
string. If you are curious how far we are still off that goal,
just try running your program with the -U option.

Regards,
Martin


From ilias at lazaridis.com  Sun Feb 20 06:29:02 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sun, 20 Feb 2005 13:29:02 +0200
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <1108841089.636568.292320@c13g2000cwb.googlegroups.com>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr> <cv7k8e$4pa$03$1@news.t-online.com>
	<cv7m2m$gp$1@usenet.otenet.gr> <cv7nh1$b57$03$1@news.t-online.com>
	<cv7r15$lhm$1@usenet.otenet.gr>
	<1108841089.636568.292320@c13g2000cwb.googlegroups.com>
Message-ID: <cv9s9t$69n$1@usenet.otenet.gr>

A.B., Khalid wrote:
[...] - (comments)

I've just overflown your comments for a few seconds.

And I got my confirmations.

Thank you for your time.

> --
> pyMinGW:
> http://jove.prohosting.com/iwave/ipython/pyMinGW.html

.

-- 
http://lazaridis.com


From kid at kendermedia.com  Wed Feb  2 20:17:16 2005
From: kid at kendermedia.com (Kevin Dangoor)
Date: Wed, 02 Feb 2005 20:17:16 -0500
Subject: XML with Unicode: what am I doing wrong?
Message-ID: <42017B9C.1080601@kendermedia.com>

In article <ctr7ae$ioj$03$1 <at> news.t-online.com>,
 "Diez B. Roggisch" <deetsNOSPAM <at> web.de> wrote:
> you confuse unicode with utf8. Expat can parse the latter - the former is
> internal to python. And passing it to something that needs a string will
> result in a conversion - which fails because of the ascii encoding.


Ahh... that makes sense. I kept thinking that if I'm working with 
unicode strings, I should be passing around unicode objects. What you 
say makes sense, though, that the PyExpat understands UTF-8 encoded 
strings. Working with unicode objects in Python is so transparent, it's 
easy to forget about what a C extension would likely want.

Thanks Diez and Just for the quick responses!

Kevin




From fumanchu at amor.org  Fri Feb  4 11:35:54 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Fri, 4 Feb 2005 08:35:54 -0800
Subject: Converting a string to a function pointer
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E339835A@exchange.hqamor.amorhq.net>

H?kan Persson wrote:
> I am trying to "convert" a string into a function pointer.
> Suppose I have the following:
> 
> from a import a
> from b import b
> from c import c
> 
> funcString = GetFunctionAsString()
> 
> and funcString is a string that contains either "a", "b" or "c".
> How can I simply call the correct function?
> I have tried using getattr() but I don't know what the first (object) 
> argument should be in this case.

If you want to avoid typing all of the "import" statements, use something like my public-domain xray module (http://www.aminus.org/rbre/python/xray.py) and then write:


import xray
funcString = GetFunctionAsString()
func = xray.functions(funcString)
func()

Dotted-package names work with that module, by the way.

The benefit is that you can then import any function in any module.
The curse is that you can then import any function in any module. ;)


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org


From gargonx at gmail.com  Sun Feb 20 12:39:06 2005
From: gargonx at gmail.com (gargonx)
Date: 20 Feb 2005 09:39:06 -0800
Subject: help please
References: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
	<TPKdnU2eEu9xPJPfRVn-vg@comcast.com>
	<1108260752.791847.180060@l41g2000cwc.googlegroups.com>
	<Z4ydnbKMDLVvEJLfRVn-hA@comcast.com>
	<1108324679.451793.147890@z14g2000cwz.googlegroups.com>
	<i_ydnb41nJ68IZLfRVn-gw@comcast.com>
	<1108329540.239064.144920@f14g2000cwb.googlegroups.com>
	<j7udnc1ZGqsAUZLfRVn-3w@comcast.com>
	<1108334012.336816.221460@g14g2000cwa.googlegroups.com>
	<joSdnbH-qqzBZpLfRVn-tg@comcast.com>
Message-ID: <1108921146.274248.11500@g14g2000cwa.googlegroups.com>

I think there's a problem with the code:

 py> decode_replacements.update([(std[key], key) for key in std])
 py> decode_replacements.update([(ext[key], key) for key in ext])

when i run this i get an error:
 AttributeError: keys

I can't get that figured out



From strombrg at dcs.nac.uci.edu  Wed Feb  2 21:15:29 2005
From: strombrg at dcs.nac.uci.edu (Dan Stromberg)
Date: Thu, 03 Feb 2005 02:15:29 GMT
Subject: mounting a filesystem?
Message-ID: <pan.2005.02.03.02.15.29.529501@dcs.nac.uci.edu>


Is there a python module that can mount a filesystem?

More specifically, a loopback filesystem with a particular offset, under
linux?

Thanks!



From francis.girard at free.fr  Mon Feb  7 15:11:50 2005
From: francis.girard at free.fr (Francis Girard)
Date: Mon, 7 Feb 2005 21:11:50 +0100
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <CdydnQBDEpwmXJrfRVn-1g@comcast.com>
References: <dvOMd.33656$EG1.19314@lakeread04>
	<mailman.2099.1107802768.22381.python-list@python.org>
	<CdydnQBDEpwmXJrfRVn-1g@comcast.com>
Message-ID: <200502072111.50781.francis.girard@free.fr>

Le lundi 7 F?vrier 2005 20:30, Steven Bethard a ?crit?:
> Francis Girard wrote:
> > Is there someone on this list using this tool and happy with it ? Or is
> > my mind too much targeted on FP paradigm and most of you really think
> > that all the functions that apply another function to each and every
> > elements of a list are bad (like "reduce", "map", "filter") ?
>
> I know there are definitely proponents for map and filter, especially
> for simple cases like:
>
>      map(int, lst)
>      filter(str.strip, lst)
>
> Note that, unlike reduce, map and filter aren't really going to increase
> the number of function calls.  Consider the equivalent list comprehensions:
>
>      [int(x) for x in lst]
>      [x for x in lst if str.strip(x)]    [1]
>
> The list comprehensions also require the same number of function calls
> in these cases.  Of course, in cases where a function does not already
> exist, map and filter will require more function calls.  Compare:
>
>      map(lambda x: x**2 + 1, lst)
>
> with
>
>      [x**2 + 1 for x in lst]
>
> Where the LC allows you to essentially "inline" the function.  (You can
> dis.dis these to see the difference if you like.)
>


I see.


>
> As far as my personal preferences go, while the simple cases of map and
> filter (the ones using existing functions) are certainly easy enough for
> me to read, for more complicated cases, I find things like:
>
>      [x**2 + 1 for x in lst]
>      [x for x in lst if (x**2 + 1) % 3 == 1]
>
> much more readable than the corresponding:
>
>      map(lambda x: x**2 + 1, lst)
>      filter(lambda x: (x**2 + 1) % 3 == 1, lst)
>

I agree.

> especially since I avoid lambda usage, and would have to write these as:

Why avoid "lambda" usage ? You find them too difficult to read (I mean in 
general) ?

>
>      def f1(x):
>          return x**2 + 1
>      map(f1, lst)
>
>      def f2(x):
>          return (x**2 + 1) % 3 == 1
>      map(f2, lst)
>
> (I actually find the non-lambda code clearer, but still more complicated
> than the list comprehensions.)
>
> Given that I use list comprehensions for the complicated cases, I find
> it to be more consistent if I use list comprehensions in all cases, so I
> even tend to avoid the simple map and filter cases.
>
>
> As far as reduce goes, I've never seen code that I thought was clearer
> using reduce than using a for-loop.  I have some experience with FP, and
> I can certainly figure out what a given reduce call is doing given
> enough time, but I can always understand the for-loop version much more
> quickly.
>

I think it's a question of habits. But I agree that we should always go with 
code we find easy to read and that we think others find the same.
I think I will stop using that function in Python if Python practionners find 
it difficult to read in general. There is no point in being cool just for 
being cool.

Thank you
Francis Girard

>
> Of course, YMMV.
>
> STeVe
>
>
> [1] While it's not technically equivalent, this would almost certainly
> be written as:
>      [x for x in lst if x.strip()]
> which in fact takes better advantage of Python's duck-typing -- it will
> work for unicode objects too.



From mahs at telcopartners.com  Fri Feb  4 23:08:06 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 04 Feb 2005 20:08:06 -0800
Subject: returning True, False or None
In-Reply-To: <jvudndJ_-tb53pnfRVn-hQ@rcn.net>
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com><6Z6dnVfTmdUDopnfRVn-1A@rcn.net>	<mailman.1946.1107575241.22381.python-list@python.org>
	<jvudndJ_-tb53pnfRVn-hQ@rcn.net>
Message-ID: <cu1gl5$dnb$1@sea.gmane.org>

Fahri Basegmez wrote:
> "Michael Spencer" <mahs at telcopartners.com> wrote in message 
> news:mailman.1946.1107575241.22381.python-list at python.org...
> 
>>Fahri Basegmez wrote:
>>
>>>reduce(lambda x, y: x or y, lst)
>>>
>>>works but when I tried
>>>
>>>import operator
>>>reduce(operator.or_, lst)
>>>
>>>this did not work.  It pukes
>>>
>>>Traceback (most recent call last):
>>>  File "<interactive input>", line 1, in ?
>>>TypeError: unsupported operand type(s) for |: 'NoneType' and 'bool'
>>>
>>>Any comments?
>>>
>>>Fahri
>>>
>>>
>>
>>TypeError: unsupported operand type(s) for |: 'NoneType' and 'bool'
>>
>>operator.or_ is "|" i.e., bitwise, not logical or
>>
>>Michael
>>
> 
> 
> That explains it.  Is there a logical or we can use with reduce?
> 
> Fahri 
> 
> 
Yes, but it's not quite the same as the 'or' operator

  >>> bool.__or__(True, False)
True
  >>> bool.__or__(False, False)
False
  >>> bool.__or__(False, None)
NotImplemented
  >>>

this may not be intentional...

Michael



From irmen.NOSPAM at xs4all.nl  Wed Feb 16 14:02:05 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Wed, 16 Feb 2005 20:02:05 +0100
Subject: SHA1 broken
In-Reply-To: <mailman.2673.1108528360.22381.python-list@python.org>
References: <mailman.2673.1108528360.22381.python-list@python.org>
Message-ID: <421398ad$0$28984$e4fe514c@news.xs4all.nl>

Tim Churches wrote:

> Also, the new findings only apply to hash collisions, not to the invertibility of SHA1 
> hashes - thus, as Schneier points out, uses of keyed hashes (such as HMAC) are not 
> compromised by this.

What about HMAC-MD5?

--Irmen


From dbickett at gmail.com  Wed Feb  2 22:43:52 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Wed, 2 Feb 2005 22:43:52 -0500
Subject: IDLE history, Python IDE, and Interactive Python with Vim
In-Reply-To: <opsllommgvb1cml1@ashot>
References: <opsllommgvb1cml1@ashot>
Message-ID: <1d6cdae305020219434e814e86@mail.gmail.com>

This is certainly a worthy topic. There are several IDEs for Python
(one I like very much being Komodo) that have plenty of fancy
debugging features and advanced operations, however I have yet to
encounter (elsewhere) the convenience that comes with being able to
press F5 and have an interactive interpreter load my code and be ready
for testing.

That said, that is my only reason for my ever using IDLE. Without it I
would probably forget that IDLE exists, were it not for the obnoxious
context menu entry. ;)

-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From steve at holdenweb.com  Sun Feb  6 15:41:58 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 06 Feb 2005 15:41:58 -0500
Subject: OT: why are LAMP sites slow?
In-Reply-To: <a4rNd.3807$Sw3.2134@news02.roc.ny>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<opslnkqsjo6yt6e7@news.cisco.com>
	<7xhdktt36q.fsf@ruckus.brouhaha.com>
	<opslnr3rbs6yt6e7@news.cisco.com>
	<7xacqkc0uq.fsf@ruckus.brouhaha.com>
	<mailman.1892.1107532773.22381.python-list@python.org>
	<cu51m5$c6j$1@eeyore.INS.cwru.edu>
	<a4rNd.3807$Sw3.2134@news02.roc.ny>
Message-ID: <LnvNd.104848$Jk5.61851@lakeread01>

Lee Harr wrote:

> On 2005-02-06, Brian Beck <exogen at gmail.com> wrote:
> 
>>>Refactoring a database on a live system is a giant pain in the ass,
>>>simpler file-based approaches make incremental updates easier.
>>>
> 
> 
>>As much as I hate working with relational databases, I think you're 
>>forgetting the reliability even the most poorly-designed database 
>>provides. Continuing with the words example: assuming all words would 
>>otherwise be stored in a table, consider the process of updating the 
>>database schema--all entries are guaranteed to conform to the new 
>>schema.
> 
> 
> 
> Not only that, but with a well-design RDBMS you can put your
> schema changes inside of a transaction and make sure everything
> is right before committing.
> 
Bear in mind, however, that *most* common RDBMS will treat each DDL 
statement as implicitly committing, so transactional change abilities 
*don't* extend to schema changes.

> Isn't there a saying like ... those who create file-based
> databases are destined to re-create a relational database
> management system poorly?  ;o)

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From bpeng at rice.edu  Sat Feb  5 00:24:08 2005
From: bpeng at rice.edu (Bo Peng)
Date: Fri, 04 Feb 2005 23:24:08 -0600
Subject: changing local namespace of a function
In-Reply-To: <mailman.1948.1107575575.22381.python-list@python.org>
References: <cu0lru$8ik$1@joe.rice.edu>
	<cu0sj5$sfk$1@sea.gmane.org>	<4204400C.5060608@iinet.net.au>
	<mailman.1948.1107575575.22381.python-list@python.org>
Message-ID: <cu1l9o$3oq$1@joe.rice.edu>

Thank all for your suggestions. I have tried all methods and compared 
their performance.

 >>> import profile
 >>> a = {'x':1, 'y':2}
 >>> N = 100000
 >>> # solution one: use dictionary directly
... def fun1(d):
...   for i in xrange(0,N):
...     d['z'] = d['x'] + d['y']
...
 >>> # solution two: use exec
... def fun2(d):
...   for i in xrange(0,N):
...     exec 'z = x + y' in globals(), d
...
 >>> # solution three: update local dictionary
... # Note that locals() is *not* d after update() so
... #   z = x + y
... # does not set z in d
... def fun3(d):
...   exec "locals().update(d)"
...   for i in xrange(0,N):
...     d['z'] = x + y
...
 >>> # solution four: use dict wrapper
... # this makes code easier to write and read
... class wrapdict(object):
...   """Lazy attribute access to dictionary keys.  Will not access
...      keys that are not valid attribute names!"""
...   def __init__(self, mydict):
...     object.__setattr__(self, "mydict",mydict)
...   def __getattr__(self, attrname):
...     return self.mydict[attrname]
...   def __setattr__(self, attrname, value):
...     self.mydict[attrname] = value
...
 >>> # use wrapper
... def fun4(d):
...   wd = wrapdict(d)
...   for i in xrange(0,N):
...     wd.z = wd.x + wd.y
...
 >>> profile.run('fun1(a)')
          3 function calls in 0.070 CPU seconds

    Ordered by: standard name

    ncalls  tottime  percall  cumtime  percall filename:lineno(function)
         1    0.000    0.000    0.060    0.060 <string>:1(?)
         1    0.010    0.010    0.070    0.070 profile:0(fun1(a))
         0    0.000             0.000          profile:0(profiler)
         1    0.060    0.060    0.060    0.060 python-4645vcY.py:2(fun1)


 >>> profile.run('fun2(a)')
          100003 function calls (3 primitive calls) in 5.890 CPU seconds

    Ordered by: standard name

    ncalls  tottime  percall  cumtime  percall filename:lineno(function)
  100001/1    0.440    0.000    5.890    5.890 <string>:1(?)
         1    0.000    0.000    5.890    5.890 profile:0(fun2(a))
         0    0.000             0.000          profile:0(profiler)
         1    5.450    5.450    5.890    5.890 python-46458me.py:2(fun2)


 >>> profile.run('fun3(a)')
          4 function calls (3 primitive calls) in 0.060 CPU seconds

    Ordered by: standard name

    ncalls  tottime  percall  cumtime  percall filename:lineno(function)
       2/1    0.000    0.000    0.060    0.060 <string>:1(?)
         1    0.000    0.000    0.060    0.060 profile:0(fun3(a))
         0    0.000             0.000          profile:0(profiler)
         1    0.060    0.060    0.060    0.060 python-4645Jxk.py:5(fun3)


 >>> profile.run('fun4(a)')
          300004 function calls in 3.910 CPU seconds

    Ordered by: standard name

    ncalls  tottime  percall  cumtime  percall filename:lineno(function)
         1    0.000    0.000    3.910    3.910 <string>:1(?)
         1    0.000    0.000    3.910    3.910 profile:0(fun4(a))
         0    0.000             0.000          profile:0(profiler)
    100000    0.530    0.000    0.530    0.000 
python-4645W7q.py:10(__setattr__)
         1    0.000    0.000    0.000    0.000 python-4645W7q.py:6(__init__)
    200000    0.960    0.000    0.960    0.000 
python-4645W7q.py:8(__getattr__)
         1    2.420    2.420    3.910    3.910 python-4645jFx.py:1(fun4)

Exec is slow since compiling the string and calls to globals() use a lot 
of time.  The last one is most elegant but __getattr__ and __setattr__ 
are costly. The 'evil hack' solution is good since accessing x and y 
takes no additional time.

I guess I will go with solution 3. It is evil but it is most close to my 
original intention. It leads to most readable code (except for the first 
line to do the magic and the last line to return result) and fastest 
performance.

Thank again for everyone's help. I have learned a lot from the posts, 
especially the wrapdict class.

Bo


From just at xs4all.nl  Sat Feb 26 14:46:21 2005
From: just at xs4all.nl (Just)
Date: Sat, 26 Feb 2005 20:46:21 +0100
Subject: any Python equivalent of Math::Polynomial::Solve?
References: <just-420C1F.16423926022005@news1.news.xs4all.nl>
	<cvqgn5$n0b$1@e250.ripco.com>
Message-ID: <just-8EF886.20462126022005@news1.news.xs4all.nl>

In article <cvqgn5$n0b$1 at e250.ripco.com>,
 jgamble at ripco.com (John M. Gamble) wrote:

> In article <just-420C1F.16423926022005 at news1.news.xs4all.nl>,
> Just  <just at xs4all.nl> wrote:
> >While googling for a non-linear equation solver, I found 
> >Math::Polynomial::Solve in CPAN. It seems a great little module, except 
> 
> Thank you.
> 
> >it's not Python... 
> 
> Sorry about that.

Heh, how big are the odds you find the author of an arbitrary Perl 
module on c.l.py...

> >                   I'm especially looking for its poly_root() 
> >functionality (which solves arbitrary polynomials). Does anyone know of 
> >a Python module/package that implements that?
> 
> Are you looking for that particular algorithm, or for any
> source that will find the roots of the polynomial? 

Any will do. As I wrote in another post, I'm currently only looking for 
a quintic equation solver, which your module does very nicely.

> The
> original source for the algorithm used in the module is
> from Hiroshi Murakami's Fortran source, and it shouldn't
> be too difficult to repeat the translation process to python.

Ah ok, I'll try to locate that (following the instruction in Solve.pm 
didn't work for me :( ).

Just


From ray at rgibbon.freeserve.co.uk  Sat Feb 12 22:06:44 2005
From: ray at rgibbon.freeserve.co.uk (Ray Gibbon)
Date: Sun, 13 Feb 2005 03:06:44 -0000
Subject: Testing conditions.
References: <cues7q$mg7$1@news7.svr.pol.co.uk>
Message-ID: <cumh6t$o1d$1@news6.svr.pol.co.uk>

> Testing conditions.
>

All replies - Spot on!

Much appreciated, apology for delay.

Ray.




From noahspurrier at gmail.com  Tue Feb 22 20:11:49 2005
From: noahspurrier at gmail.com (Noah)
Date: 22 Feb 2005 17:11:49 -0800
Subject: Comm. between Python and PHP
In-Reply-To: <lnsm11d91ug2gfh5gjvutga4dthhg0rjbf@4ax.com>
References: <lnsm11d91ug2gfh5gjvutga4dthhg0rjbf@4ax.com>
Message-ID: <1109121109.176070.84810@l41g2000cwc.googlegroups.com>

It wasn't quite clear, but I assume that you want a PHP script that
can call on the Python daemon and not have the daemon make
calls to a PHP script.

You could use xml-rpc which is built into Python as of version 2.2:
    http://docs.python.org/lib/module-xmlrpclib.html
On the PHP side xmlrpc is still experimental. You have to
enable this when you build PHP:
    http://us3.php.net/manual/en/ref.xmlrpc.php

You could also just add a simple HTTP interface to your daemon.
It's pretty easy to add an HTTP interface to your daemon.
Look at SimpleHTTPServer the docs:
    http://docs.python.org/lib/module-SimpleHTTPServer.html
You will also need to read the source for SimpleHTTPServer.py to
figure out how it works (I don't know why they don't just put the
example
in the docs instead of putting the example in the source).

Yours,
Noah



From sean_mcilroy at yahoo.com  Mon Feb 28 22:44:41 2005
From: sean_mcilroy at yahoo.com (Sean McIlroy)
Date: 28 Feb 2005 19:44:41 -0800
Subject: String Replace Problem...
References: <mailman.3138.1109605552.22381.python-list@python.org>
	<e5063e96.0502281129.5e129061@posting.google.com>
	<8KqdnUR88Z-4Gr7fRVn-2A@comcast.com>
Message-ID: <e5063e96.0502281944.7f90985e@posting.google.com>

Alright, now it's too much. It's not enough that you're eliminating it
from the language, you have to stigmatize the lambda as well. You
should take some time to reflect that not everybody thinks the same
way. Those of us who are mathematically inclined like the lambda
because it fits in well with the way we already think. And besides, it
amounts to an explicit declaration that the function in question has
no side effects. And besides, it adds flexibility to the language. Go
ahead and throw it away, but you're making python less accessible for
those of us whose central concern is something other than programming.
("Single line" indeed!)


From donn at u.washington.edu  Fri Feb 25 13:24:43 2005
From: donn at u.washington.edu (Donn Cave)
Date: Fri, 25 Feb 2005 10:24:43 -0800
Subject: Threading and consuming output from processes
References: <1109278779.955986.193860@z14g2000cwz.googlegroups.com>
	<1109283053.971905.27670@z14g2000cwz.googlegroups.com>
	<1109295016.597170.21350@o13g2000cwo.googlegroups.com>
	<YBwTd.38471$H05.20645@twister.nyroc.rr.com>
	<mailman.3032.1109301798.22381.python-list@python.org>
Message-ID: <donn-03556F.10244325022005@gnus01.u.washington.edu>

In article <mailman.3032.1109301798.22381.python-list at python.org>,
 Jack Orenstein <jao at geophile.com> wrote:
> I am developing a Python program that submits a command to each node
> of a cluster and consumes the stdout and stderr from each. I want all
> the processes to run in parallel, so I start a thread for each
> node. There could be a lot of output from a node, so I have a thread
> reading each stream, for a total of three threads per node. (I could
> probably reduce to two threads per node by having the process thread
> handle stdout or stderr.)
> 
> I've developed some code and have run into problems using the
> threading module, and have questions at various levels of detail.
> 
> 1) How should I solve this problem? I'm an experienced Java programmer
> but new to Python, so my solution looks very Java-like (hence the use of
> the threading module). Any advice on the right way to approach the
> problem in Python would be useful.
> 
> 2) How many active Python threads is it reasonable to have at one
> time? Our clusters have up to 50 nodes -- is 100-150 threads known to
> work? (I'm using Python 2.2.2 on RedHat 9.)
> 
> 3) I've run into a number of problems with the threading module. My
> program seems to work about 90% of the time. The remaining 10%, it
> looks like notify or notifyAll don't wake up waiting threads; or I
> find some other problem that makes me wonder about the stability of
> the threading module. I can post details on the problems I'm seeing,
> but I thought it would be good to get general feedback
> first. (Googling doesn't turn up any signs of trouble.)

One of my colleagues here wrote a sort of similar application
in Python, used threads, and had plenty of troubles with it.
I don't recall the details.  Some of the problems could be
specific to Python.  For example, there are some extra signal
handling issues - but this is not to say that there are no
signal handling issues with a multithreaded C application.
For my money, you just don't get robust applications when
you solve problems like multiple I/O sources by throwing
threads at them.

As I see another followup has already mentioned, the classic
"pre threads" solution to multiple I/O sources is the select(2)
function, which allows a single thread to serially process
multiple file descriptors as data becomes available on them.
When using select(), you should read from the file descriptor,
using os.read(fd, size), socketobject.recv(size) etc., to
avoid reading into local buffers as would happen with a file
object.

   Donn Cave, donn at u.washington.edu


From peter at engcorp.com  Fri Feb 11 21:58:21 2005
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 11 Feb 2005 21:58:21 -0500
Subject: check if object is number
In-Reply-To: <374t0mF4te5vbU1@individual.net>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
	<374t0mF4te5vbU1@individual.net>
Message-ID: <7tOdnYs6NtrV7JDfRVn-vQ@powergate.ca>

marco wrote:
> Steven Bethard wrote:
>> Is there a good way to determine if an object is a numeric type? 
> 
> Maybe this can help?
> 
> def isnumber(x):
>     try:
>         return(x == x-0)
>     except:
>         return False

Not exactly foolproof:

 >>> def isnumber(x):
...   try: return (x == x-0)
...   except: return False
...
 >>> import numarray
 >>> a = numarray.arange(1.1, 5.5)
 >>> a
array([ 1.1,  2.1,  3.1,  4.1,  5.1])
 >>> print '%s:\t' % a, isnumber(a)
[ 1.1  2.1  3.1  4.1  5.1]:     [1 1 1 1 1]

The result is actually this:

 >>> a == a-0
array([1, 1, 1, 1, 1], type=Bool)

And if you try to call bool() on it (as perhaps
your isnumber() routine already should have, rather
than relying on == to return a boolean):

 >>> bool(a == (a-0))
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "C:\a\python24\Lib\site-packages\numarray\generic.py", line 477, in 
__nonzero__
     raise RuntimeError("An array doesn't make sense as a truth value.  Use 
sometrue(a) or alltrue(a).")
RuntimeError: An array doesn't make sense as a truth value.  Use sometrue(a) or
alltrue(a).

Yuck.

Of course, most of the other definitions of "is a number" that
have been posted may likewise fail (defined as not doing what the
OP would have wanted, in this case) with a numarray arange.
Or maybe not.  (Pretty much all of them will call an arange a
number... would the OP's function work properly with that?)

-Peter


From fredrik at pythonware.com  Tue Feb  8 11:26:07 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 17:26:07 +0100
Subject: Efficient checksum calculating on lagre files
References: <5o2nd2-5hl.ln1@pluto.i.infosense.no>
	<4208E537.4070901@chamonix.reportlab.co.uk>
Message-ID: <cuap40$m9i$1@sea.gmane.org>

Robin Becker wrote:

>> Does anyone know of a fast way to calculate checksums for a large file. I need a way to generate 
>> ETag keys for a webserver, the ETag of large files are not realy nececary, but it would be nice 
>> if I could do it. I'm using the python hash function on the dynamic generated strings (like in 
>> page content) but on things like images I use the shutil's copyfileobject function and the hash 
>> of a fileobject's hash are it's handlers memmory address.
>>
>> Does anyone know a python utility which is possible to use, perhaps something like the md5sum 
>> utility on *nix systems.
>>
> well md5sum is usable on many systems. I run it on win32 and darwin.
>
> I tried this in 2.4 with the new subprocess module

on my machine, Python's md5+mmap is a little bit faster than
subprocess+md5sum:

    import os, md5, mmap

    file = open(fn, "r+")
    size = os.path.getsize(fn)
    hash = md5.md5(mmap.mmap(file.fileno(), size)).hexdigest()

(I suspect that md5sum also uses mmap, so the difference is
probably just the subprocess overhead)

</F> 





From greg at invalid.invalid  Sun Feb  6 13:54:03 2005
From: greg at invalid.invalid (Greg Krohn)
Date: Sun, 06 Feb 2005 18:54:03 GMT
Subject: pygame.mixer.music not playing
In-Reply-To: <36mb0iF54udklU1@individual.net>
References: <36mb0iF54udklU1@individual.net>
Message-ID: <fJtNd.1869$mG6.1479@newsread1.news.pas.earthlink.net>

Marian Aldenh?vel wrote:
> Hi,
> 
> I am trying to make pygame play music on windows. This simple program:
> 
>     import pygame,time
>     pygame.init()
>     print "Mixer settings", pygame.mixer.get_init()
>     print "Mixer channels", pygame.mixer.get_num_channels()
>     pygame.mixer.music.set_volume(1.0)
>     pygame.mixer.music.load('file1.mp3)
>     print "Play"
>     pygame.mixer.music.play()
> 
>     while pygame.mixer.music.get_busy():
>         print "Playing", pygame.mixer.music.get_pos()
>         time.sleep(1)
>     
>     print "Done"

I tried this exact same code (except the mp3 filename, of course) on my 
machine and it worked fine. ActivePython 2.3.4 and Pygame 1.6. Could it 
be a hardware problem?

-greg


From tjreedy at udel.edu  Sat Feb 26 21:16:47 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 26 Feb 2005 21:16:47 -0500
Subject: string methods (warning, newbie)
References: <38co9sF5lgss3U1@individual.net>
Message-ID: <cvraaa$n3s$1@sea.gmane.org>


"anthonyberet" <nospam at me.invalid> wrote in message 
news:38co9sF5lgss3U1 at individual.net...
> Is there a string mething to return only the alpha characters of a 
> string?
> eg 'The Beatles - help - 03 - Ticket to ride', would be 
> 'TheBeatlesTickettoride'

I believe you can do this with string.translate (string module, not str())

tjr





From lee at example.com  Thu Feb  3 17:57:52 2005
From: lee at example.com (Lee Harr)
Date: Thu, 03 Feb 2005 22:57:52 GMT
Subject: Popularizing SimpleHTTPServer and CGIHTTPServer
References: <1107412654.121488.157070@c13g2000cwb.googlegroups.com>
	<Xns95F25F64B1D31devnulljoreybumpcom@199.45.49.11>
Message-ID: <Q%xMd.3495$4D3.3076@news02.roc.ny>

> Does anyone know how to use SimpleHTTPServer to:
>
> 1. Support virtual hosts?
>
> 2. Support SSL?
>
> I'd like to use SimpleHTTPServer to create some simple reporting utilities, 
> but can't get past these two points. Is there a NotSoSimpleHTTPServer?


I think I would point to twisted for that. It is another
dependency, but it has all you will ever need and more.



From jtp11 at att.net  Thu Feb 10 08:38:12 2005
From: jtp11 at att.net (Jim)
Date: 10 Feb 2005 05:38:12 -0800
Subject: Loop in list.
In-Reply-To: <1108036633.269008.194370@l41g2000cwc.googlegroups.com>
References: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
	<3e8ca5c805020813074e975a4d@mail.gmail.com>
	<mailman.2214.1107900378.22381.python-list@python.org>
	<1108003131.605166.309350@c13g2000cwb.googlegroups.com>
	<1108036633.269008.194370@l41g2000cwc.googlegroups.com>
Message-ID: <1108042692.085985.153940@z14g2000cwz.googlegroups.com>

I assume this is one of the addons for Python.  I know that there
is a great deal of stuff out there available for Python that does
some of the stuff that I am looking at, but I am interested in
learning to use Python.  When I want to get faster and more
general, I will get some of this stuff or use a different language.

Thanks for the help.

Jim



From fuzzyman at gmail.com  Mon Feb 14 03:41:31 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 14 Feb 2005 00:41:31 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cuo71l$gig$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
Message-ID: <1108370491.792820.142200@z14g2000cwz.googlegroups.com>


Ilias Lazaridis wrote:
> I'm a newcomer to python:
>
> [EVALUATION] - E01: The Java Failure - May Python Helps?
>
http://groups-beta.google.com/group/comp.lang.python/msg/75f0c5c35374f553
>
> -
>
> I've download (as suggested) the python 2.4 installer for windows.
>
> Now I have problems to compile python extension that some packages
> depend on.
>
> I use the MinGW open-source compiler.
>
> -
>
> My questions:
>
> a) Why does the Python Foundation not provide additionally a binary
> version, compiled with MinGW or another open-source compiler?
>

It's not necessary.

> b) Why does the Python Foundation not ensure, that the python
> source-code is directly compilable with MinGW?
>

Are you sure it isn't ?

> c) Why are the following efforts not _directly_ included in the
python
> source code base?
>
> http://jove.prohosting.com/iwave/ipython/pyMinGW.html
>
> above link found in this thread:
>
>
http://groups-beta.google.com/group/comp.lang.python/msg/c9f0444c467de525
>
> d) Is it really neccessary that I dive into such adventures, to be
able
> to do the most natural thing like: "developing python extensions with

> MinGW"?
>
> http://starship.python.net/crew/kernr/mingw32/Notes.html
>

Not very difficult. The mingw compiler *is* supported through
distutils. distutils can straightforwardly be configured to build
extensions with mingw. The relevent lib files need converting, which is
also simple.

I did it for Python 2.3. For Python 2.4 I use the free MS optimimizing
compiler. That does need a bit of hacking into distutils, but gain -
not very difficult.

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml

> e) Is there any official statement available regarding the
msvcr71.dll
> and other MS licensing issues?
>
> [see several threads "[Python-Dev] Is msvcr71.dll
re-redistributable?"]
>
> http://mail.python.org/pipermail/python-dev/2005-February/thread.html
>
> f) Are there any official (Python Foundation) statements / rationales

> available, which explain why the MinGW compiler is unsupported,
although
> parts of the community obviously like to use it?
>
>
http://groups-beta.google.com/group/comp.lang.python/msg/dc3474e6c8053336
>
> -
>
> I just want to understand.
>
> Thankfull for any pointer to official documents / statements.
>
> [google is _not_ a fried here. I like to have a stable development
> environment, which is supported by the official projects, thus it can

> pass quality-assurance without beeing afraid about every next
release.]
> 
> .
> 
> -- 
> http://lazaridis.com



From aahz at pythoncraft.com  Thu Feb  3 19:42:09 2005
From: aahz at pythoncraft.com (Aahz)
Date: 3 Feb 2005 19:42:09 -0500
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
Message-ID: <ctugd1$t12$1@panix1.panix.com>

In article <7x8y65kwfl.fsf at ruckus.brouhaha.com>,
Paul Rubin  <http://phr.cx at NOSPAM.invalid> wrote:
>
>I've only worked on one serious site of this type and it was "SAJO"
>(Solaris Apache Java Oracle) rather than LAMP, but the concepts are
>the same.  I just feel like something bogus has to be going on.  I
>think even sites like Slashdot handle fewer TPS than a 1960's airline
>reservation that ran on hardware with a fraction of the power of one
>of today's laptops.

Something I saw recently was that XML has inherently horrid performance
for searching precisely because it isn't fixed-length records.  Yes, the
old platforms handled more TPS, but they also handled much less data of
a form much more amenable to indexing.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From peter at engcorp.com  Wed Feb  9 13:13:01 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 09 Feb 2005 13:13:01 -0500
Subject: Python and version control
In-Reply-To: <XNrOd.1657$Mw3.72@amstwist00>
References: <XNrOd.1657$Mw3.72@amstwist00>
Message-ID: <avOdnSfqFtw2z5ffRVn-1w@powergate.ca>

Carl wrote:
> What is the ultimate version control tool for Python if you are working in a
> Windows environment? 
> 
> What is the most common adopted approach among Python developers working in
> a Windows environment? 

I never liked coupling the two together like that.  Instead
I use tools like TortoiseCVS or (now) TortoiseSVN with a
Subversion repository.  These things let you access revision
control features from context (right-button) menus right in
Windows Explorer, as you browse the file system.

The best part is that they work regardless of which editor or
other tool you have to work with, and you aren't at the mercy
of a greedy corporation that decides it's time for you to
upgrade so you can give them more money.  You can also use
the command line tools when appropriate, of course.

-- 

BTW, as a general caution: while Visual Source Safe may be
"easy", it's also dangerous and has been known to corrupt
many a code base, mine included.  I wouldn't touch the product
with a virtual ten-foot pole, and I strongly recommend to anyone
who is stuck using it -- *especially in a multi-programmer
environment* -- that they immediately abandon it in favour
of something more stable.  (Google can fill in background detail
for anyone interested.)

-Peter


From steven.bethard at gmail.com  Wed Feb  2 15:27:24 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 02 Feb 2005 13:27:24 -0700
Subject: Two classes problem
In-Reply-To: <opsllpombg1js0xs@news.telkomsa.net>
References: <mailman.1768.1107369788.22381.python-list@python.org>
	<opsllpombg1js0xs@news.telkomsa.net>
Message-ID: <g_CdnbihmfIxqpzfRVn-hw@comcast.com>

Caleb Hattingh wrote:
> ===file: a.py===
> # module a.py
> test = 'first'
> class aclass:
>     def __init__(self, mod, value):
>         mod.test = value                # Is there another way to refer 
> to  the module this class sits in?
> ===end: a.py===

You can usually import the current module with:

__import__(__name__)

so you could write the code like:

test = 'first'
class aclass:
     def __init__(self, value):
         mod = __import__(__name__)
         mod.test = value

or you could use globals() like:

test = 'first'
class aclass:
     def __init__(self, value):
         globals()['test'] = value

> ===file: b.py===
> # file b.py
> import a
> x = a.aclass(a,'monkey')
> print a.test
> ===end: b.py===

If you used one of the solutions above, this code would be rewritten as:

import a
x = a.aclass('monkey')
print a.test


To the OP:

In general, this seems like a bad organization strategy for your code. 
What is your actual use case?

Steve


From nytimes at swiftdsl.com.au  Thu Feb 17 03:07:40 2005
From: nytimes at swiftdsl.com.au (news.sydney.pipenetworks.com)
Date: Thu, 17 Feb 2005 19:07:40 +1100
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<37hqlrF59l2b2U1@individual.net>
	<873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
Message-ID: <421450CC.9080504@swiftdsl.com.au>

Nick Vargish wrote:
> Leo Breebaart <leo at lspace.org> writes:
> 
> 
>>That suggests
>>to me an "obvious default" of the kind that exists elsewhere in
>>Python as well.
> 
> 
> I feel pretty much the opposite... If a non-string-type has managed to
> get into my list-of-strings, then something has gone wrong and I would
> like to know about this potential problem.
> 
> If you want to do force a conversion before the join, you can use a 
> list comp:
> 
> ', '.join([str(x) for x in l])
> 
> 
> Nick "Explicit is better than Implicit"
> 

Really ? Then why are you using python. Python or most dynamic languages 
are are so great because of their common sense towards the "implicit". 
You must have heard of "never say never" but "never say always" (as in 
"always better") is more appropriate here. There are many cases of 
python's implicitness.

What about

a = "string"
b = 2
c = "%s%s" % (a, b)

There is an implicit str(b) here.

''.join(["string", 2]) to me is no different then the example above.


Huy


From ncoghlan at iinet.net.au  Fri Feb 25 21:04:38 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 26 Feb 2005 12:04:38 +1000
Subject: Code evaluation at function definition execution time (was Re:
 Compile time evaluation (aka eliminating default argument hacks))
In-Reply-To: <421FD226.2060006@iinet.net.au>
References: <mailman.2997.1109243714.22381.python-list@python.org>	<ceGdnSLOHIvbfIDfRVn-jg@comcast.com>
	<421FD226.2060006@iinet.net.au>
Message-ID: <421FD936.6090007@iinet.net.au>

Nick Coghlan wrote:
> Basically, yeah. Although I later realised I got the name of the feature 
> I want wrong - default arguments are evaluated when the def statement is 
> executed, not when the code is compiled. So it's a matter of being able 
> to execute some code in the functions local namespace at compile time.

D'oh - "definition execution time", not compile time.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From jmeile at hotmail.com  Mon Feb 28 05:53:40 2005
From: jmeile at hotmail.com (Josef Meile)
Date: Mon, 28 Feb 2005 11:53:40 +0100
Subject: split a directory string into a list
In-Reply-To: <Xns9609717C8B6A3duncanrcpcouk@127.0.0.1>
References: <Xns96089DC274CF8duncanrcpcouk@127.0.0.1>	<mailman.3063.1109355891.22381.python-list@python.org>
	<Xns9609717C8B6A3duncanrcpcouk@127.0.0.1>
Message-ID: <4222F834.30403@hotmail.com>

> The most obvious case where it wouldn't work would be for a UNC path name. 
> Using the string split method gives two empty strings:
> 
> 
>>>>os.path.normpath(r'\\machine\share').split(os.path.sep)
> 
> ['', '', 'machine', 'share']
> 
> 
> 
> whereas the splitpath function I proposed gives you:
> 
> 
>>>>splitpath(r'\\machine\share')
> 
> ['\\\\', 'machine', 'share']
> 
> So to find out the type of path (relative, absolute, unc), you only have to 
> consider the first element with my function but you have to look at the 
> first two elements if you just naively split the string.
Thanks for the explanation. I forgot that you could do thinks like that
on windows.

> 
> Also a relative windows path with a drive letter doesn't get fully split:
> 
> 
>>>>os.path.normpath(r'c:dir\file').split(os.path.sep)
> 
> ['c:dir', 'file']
> 
>>>>splitpath(r'c:dir\file')
> 
> ['c:', 'dir', 'file']
Again, I forgot it.

> If you really are worried about speed (and are sure you aren't optimising 
> prematurely), then you could combine some special case processing near the 
> start of the string with a simple split of the remainder.
No, I'm not worried about speed. Actually, the original post wasn't
mine. I was just curious about your answer.

Regards,
Josef


From willems.john at gmail.com  Wed Feb 23 16:26:10 2005
From: willems.john at gmail.com (John Willems)
Date: 23 Feb 2005 13:26:10 -0800
Subject: Python and "Ajax technology collaboration"
Message-ID: <1109193970.029421.213490@l41g2000cwc.googlegroups.com>


Interesting GUI developments, it seems. Anyone developed a "Ajax"
application using Python? Very curious....

thx

(Ajax stands for:
XHTML and CSS;
dynamic display and interaction using the Document Object Model;
data interchange and manipulation using XML and XSLT;
asynchronous data retrieval using XMLHttpRequest;
and JavaScript binding everything together

ie Google has used these technologies to build Gmail, Google Maps etc.

more info:
http://www.adaptivepath.com/publications/essays/archives/000385.php)



From tjprojects_usenet at yahoo.com  Tue Feb 15 22:06:50 2005
From: tjprojects_usenet at yahoo.com (TJ's Projects)
Date: 15 Feb 2005 19:06:50 -0800
Subject: Loading functions from a file during run-time
References: <1108091598.055004.24890@g14g2000cwa.googlegroups.com>
Message-ID: <f60c2138.0502151906.468fdc1b@posting.google.com>

Answer below...

"Bryant Huang" <735115 at gmail.com> wrote in message news:<1108091598.055004.24890 at g14g2000cwa.googlegroups.com>...
> Hello!
> 
> I would like to read in files, during run-time, which contain plain
> Python function definitions, and then call those functions by their
> string name. In other words, I'd like to read in arbitrary files with
> function definitions, using a typical 'open()' call, but then have
> those functions available for use.
> 

<snip>

> 
> ===== [bar.txt] =====
> 
> def negate(x):
> 	return -x
> 
> def square(x):
> 	return x*x
> 
> 
> ===== [foo.py] =====
> 
> # open functions file
> foo_file = open("bar.txt")
> foo_lines = foo_file.readlines()
> foo_file.close()
> foo_str = "".join(foo_lines)
> 
> # compile code
> foo_code = compile(foo_str, "<string>", "exec")
> foo_ns = {}
> exec(foo_code) in foo_ns
> 
> # use functions
> k = 5
> print foo_ns["negate"](k)  // outputs -5
> print foo_ns["square"](k)  // outputs 25
> 
> 
> I'm not sure exactly what happens below the surface, but I'm guessing
> the 'compile()' and 'exec()' commands load in 'negate()' and 'square()'
> as functions in the global scope of 'foo.py'. I find that when I run
> 'compile()' and 'exec()' from within a function, say 'f()', the
> functions I read in from 'bar.txt' are no longer accessible since they
> are in global scope, and not in the scope of 'f()'.
> 
> Any pointers would be very welcome.
> 
> Thanks!
> Bryant

You're actually very close here.  The problem you are having is that
you are creating a local namespace (foo_ns) and executing that code
within that namespace.  To "import" the functions into the global
namespace, exec them as:

exec foo_code in globals()


You will then be able to call the methods as if they had been declared
locally, ie. 'negate(5)' rather than 'foo_ns["negate"](5)'.



<plug type="shameless">

I've written a simple line editor intended to be used within the
Python interactive interpreter, based on the old DOS 'edlin' command. 
This is how I enable the user to "import" the entered functions into
their local namespace.  The actual "execution" of the code is actually
pretty simple, and not much more involved than what you see here.  You
may be able to get some more ideas, however.

For more info (or comments, suggestions, or pointers), check out
http://pyedlin.sourceforge.net).

</plug>


Here's a simple example that shows a "good" input loop:

====== Start exec example ======
if __name__ == '__main__':
	funcdata = ['def func():\n', "\tprint 'Hello, world!'\n", '\n']

	codeline = ''
	for line in funcdata:
		codeline += line
		execline = codeline
		if execline.endswith('\n'):
			execline = execline[:-1]

		try:
			obj = compile(execline, '<string>', 'exec')
		except SyntaxError:
			pass
		else:
			exec obj in globals()
			codeline = ''

	func()

====== End exec sample ======


Executing this code will print 'Hello, world!' to the console.


Hope this helps!

T.J.


From steven.bethard at gmail.com  Sat Feb  5 14:05:13 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 05 Feb 2005 12:05:13 -0700
Subject: empty classes as c structs?
In-Reply-To: <mailman.1963.1107594941.22381.python-list@python.org>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
Message-ID: <MIadnXkLYul4hZjfRVn-2Q@comcast.com>

Nick Coghlan wrote:
> Steven Bethard wrote:
> 
>> Yes -- help me rally behind my generic object PEP which proposes a 
>> Bunch type (probably to be renamed) for the Python standard lib. =)
> 
> Did you see the suggestion of 'namespace' as a name?

Yup, it's in the current PEP draft.  See the "Open Issues" section:


PEP: XXX
Title: Generic Object Data Type
Version: $Revision: 1.0 $
Last-Modified: $Date: 2004/11/29 16:00:00 $
Author: Steven Bethard <steven.bethard at gmail.com>
Status: Draft
Type: Standards Track
Content-Type: text/x-rst
Created: 29-Nov-2004
Python-Version: 2.5
Post-History: 29-Nov-2004


Abstract
========

This PEP proposes a standard library addition to support the simple
creation of 'generic' objects which can be given named attributes
without the need to declare a class. Such attribute-value mappings are
intended to complement the name-value mappings provided by Python's
builtin dict objects.


Motivation
==========

Python's dict objects provide a simple way of creating anonymous
name-value mappings. These mappings use the __getitem__ protocol to
access the value associated with a name, so that code generally appears
like::

     mapping['name']

Occasionally, a programmer may decide that dotted-attribute style access
is more appropriate to the domain than __getitem__ style access, and
that their mapping should be accessed like::

     mapping.name

Currently, if a Python programmer makes this design decision, they are
forced to declare a new class, and then build instances of this class.
When no methods are to be associated with the attribute-value mappings,
declaring a new class can be overkill.  This PEP proposes adding a
simple type to the collections module of the standard library that can
be used to build such attribute-value mappings.

Providing such a type allows the Python programmer to determine which
type of mapping is most appropriate to their domain and apply this
choice with minimal effort.  Some of the suggested uses include:


Returning Named Results
-----------------------

It is often appropriate for a function that returns multiple items to
give names to the different items returned.  The type suggested in this
PEP provides a simple means of doing this that allows the returned
values to be accessed in the usual attribute-style access::

     >>> def f(x):
     ...     return Bunch(double=2*x, squared=x**2)
     ...
     >>> y = f(10)
     >>> y.double
     20
     >>> y.squared
     100


Representing Hierarchical Data
------------------------------

The type suggested in this PEP also allows a simple means of
representing hierarchical data that allows attribute-style access::

     >>> x = Bunch(spam=Bunch(rabbit=1, badger=[2, 3, 4]), ham='neewom')
     >>> x.spam.badger
     [2, 3, 4]
     >>> x.ham
     'neewom'


Rationale
=========

As Bunch objects are intended primarily to replace simple, data-only
classes, simple Bunch construction was a primary concern.  As such,
the Bunch constructor supports creation from keyword arguments, dicts,
and sequences of (attribute, value) pairs::

     >>> Bunch(eggs=1, spam=2, ham=3)
     Bunch(eggs=1, ham=3, spam=2)
     >>> Bunch({'eggs':1, 'spam':2, 'ham':3})
     Bunch(eggs=1, ham=3, spam=2)
     >>> Bunch([('eggs',1), ('spam',2), ('ham',3)])
     Bunch(eggs=1, ham=3, spam=2)

To allow attribute-value mappings to be easily combined, the Bunch type
provides a update staticmethod that supports similar arguments::

     >>> bunch = Bunch(eggs=1)
     >>> Bunch.update(bunch, [('spam', 2)], ham=3)
     >>> bunch
     Bunch(eggs=1, ham=3, spam=2)

Note that update is available through the class, not through the
instances, to avoid the confusion that might arise if an 'update'
attribute added to a Bunch instance hid the update method.


If Bunch objects are used to represent hierarchical data, comparison of
such objects becomes a concern.  For this reason, Bunch objects support
object equality which compares Bunch objects by attributes recursively::

     >>> x = Bunch(parrot=Bunch(lumberjack=True, spam=42), peng='shrub')
     >>> y = Bunch(peng='shrub', parrot=Bunch(spam=42, lumberjack=True))
     >>> z = Bunch(parrot=Bunch(lumberjack=True), peng='shrub')
     >>> x == y
     True
     >>> x == z
     False


Note that support for the various mapping methods, e.g.
__(get|set|del)item__, __len__, __iter__, __contains__, items, keys,
values, etc. was intentionally omitted as these methods did not seem to
be necessary for the core uses of an attribute-value mapping.  If such
methods are truly necessary for a given use case, this may suggest that
a dict object is a more appropriate type for that use.


Examples
=========

Converting an XML DOM tree into a tree of nested Bunch objects::

     >>> import xml.dom.minidom
     >>> def getbunch(element):
     ...     result = Bunch()
     ...     if element.attributes:
     ...         Bunch.update(result, element.attributes.items())
     ...     children = {}
     ...     for child in element.childNodes:
     ...         if child.nodeType == xml.dom.minidom.Node.TEXT_NODE:
     ...             children.setdefault('text', []).append(
     ...                 child.nodeValue)
     ...         else:
     ...             children.setdefault(child.nodeName, []).append(
     ...                 getbunch(child))
     ...     Bunch.update(result, children)
     ...     return result
     ...
     >>> doc = xml.dom.minidom.parseString("""\
     ... <xml>
     ...   <a attr_a="1">
     ...     a text 1
     ...     <b attr_b="2" />
     ...     <b attr_b="3"> b text </b>
     ...     a text 2
     ...   </a>
     ...   <c attr_c="4"> c text </c>
     ... </xml>""")
     >>> b = getbunch(doc.documentElement)
     >>> b.a[0].b[1]
     Bunch(attr_b=u'3', text=[u' b text '])

Reference Implementation
========================

The code is available as SourceForge patch 1094542 [1]_.


Open Issues
===========
What should the type be named?  Some suggestions include 'Bunch',
'Record', 'Struct' and 'Namespace'.

Where should the type be placed?  The current suggestion is the
collections module.


References
==========

.. [1] 
http://sourceforge.net/tracker/index.php?func=detail&aid=1094542&group_id=5470&atid=305470



..
    Local Variables:
    mode: indented-text
    indent-tabs-mode: nil
    sentence-end-double-space: t
    fill-column: 70
    End:


From benn at cenix-bioscience.com  Mon Feb 14 10:20:10 2005
From: benn at cenix-bioscience.com (Neil Benn)
Date: Mon, 14 Feb 2005 16:20:10 +0100
Subject: For American numbers
In-Reply-To: <420e7376$1@nntp0.pdx.net>
References: <420e7376$1@nntp0.pdx.net>
Message-ID: <4210C1AA.9020104@cenix-bioscience.com>

Scott David Daniels wrote:

> Kind of fun exercise (no good for British English).
>
> <snip>

what's American about it?  If anything, it's more French than American ;-)

N

-- 

Neil Benn
Senior Automation Engineer
Cenix BioScience
BioInnovations Zentrum
Tatzberg 46
D-01307
Dresden
Germany

Tel : +49 (0)351 4173 154
e-mail : benn at cenix-bioscience.com
Cenix Website : http://www.cenix-bioscience.com



From onurb at xiludom.gro  Mon Feb 14 08:12:57 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Mon, 14 Feb 2005 14:12:57 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2527.1108384715.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<cupstp$an7$2@ctb-nnrp2.saix.net>	<cupupa$kfs$2@usenet.otenet.gr>
	<cupvhi$c15$1@news1.ucsd.edu>	<cuq084$r99$1@usenet.otenet.gr>
	<cuq2h0$j2s$1@eeyore.INS.cwru.edu>	<cuq57b$j83$1@usenet.otenet.gr>
	<mailman.2527.1108384715.22381.python-list@python.org>
Message-ID: <4210a3d9$0$23451$626a14ce@news.free.fr>

Simon Brunning wrote:
> On Mon, 14 Feb 2005 14:23:08 +0200, Ilias Lazaridis <ilias at lazaridis.com> wrote:
> 
> (snip)
> 
> 
>>But if those answers above were of official nature, I must seriously
>>rethink if I can rely on _any_ system which is based on python, as the
>>foundation and the community do not care about essential needs and
>>requirements.
> 
> 
> I couldn't agree more. You need to find a community that *does* care
> about essential needs. Might I recommend Perl or Ruby?
> 

Why do you hate Perl and Ruby community that much ?

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for 
p in 'onurb at xiludom.gro'.split('@')])"


From steven.bethard at gmail.com  Fri Feb 18 12:26:38 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 18 Feb 2005 10:26:38 -0700
Subject: combining several lambda equations
In-Reply-To: <2ae25c6b.0502180224.3d6164a7@posting.google.com>
References: <2ae25c6b.0502180224.3d6164a7@posting.google.com>
Message-ID: <ALqdnSMoh__WuIvfRVn-vA@comcast.com>

Paddy McCarthy wrote:
> x=lambda : A < B
> y=lambda : C+6 >= 7
>
[snip]
>
> Z=lambda : (A<B) and (C+6>=7)

See "Inappropriate use of Lambda" in
http://www.python.org/moin/DubiousPython

Perhaps your real example is different, but notice that
     <name> = lambda <args>: <expr>
is equivalent to
     def <name>(<args>):
         return <expr>
except that the latter will give your function a useful name.  No reason 
to use the *anonymous* function construct to create a *named* function.

STeVe


From http  Fri Feb  4 21:05:32 2005
From: http (Paul Rubin)
Date: 04 Feb 2005 18:05:32 -0800
Subject: EDI x12 --> XML
References: <mailman.1908.1107545597.22381.python-list@python.org>
Message-ID: <7xy8e3kbgz.fsf@ruckus.brouhaha.com>

Greg Lindstrom <greg.lindstrom at novasyshealth.com> writes:
> I am working on automating a system accepting input data in EDI x12
> format and would like to convert it to XML.  Before I start, I thought
> I'd ask if anyone has worked on such a beast.  I have seen work by
> Chris Cioffi on parsing EDI records.  Is anything else out there
> before I either write one or use one that I have written in Perl?

I wrote a thing like that a long time ago.  As a pure coding task,
it's not that hard.  The main hassle is having the appropriate segment
and element dictionaries for the docs you're trying to parse
(comparable to XML DTD's).  Maybe they're online someplace now.  The
main thing needing special code was the HL segment, which has a
recursive structure, but even that's such a big deal.

I don't know why you want to do this, but if you have a use for it, go
for it.


From the.ech0 at gmail.com  Sun Feb 13 20:44:47 2005
From: the.ech0 at gmail.com (ech0)
Date: 13 Feb 2005 17:44:47 -0800
Subject: Second posting - Howto connect to MsSQL
In-Reply-To: <hDRPd.4681$ZZ.4511@newssvr23.news.prodigy.net>
References: <iyMPd.4612$ZZ.1645@newssvr23.news.prodigy.net>
	<hDRPd.4681$ZZ.4511@newssvr23.news.prodigy.net>
Message-ID: <1108345487.094034.168860@o13g2000cwo.googlegroups.com>

You can also use pymssql. I've used it before on a little project. It
looks like it works on linux too.

http://pymssql.sourceforge.net/



From dev at huelix-remove.com  Sat Feb 26 11:34:27 2005
From: dev at huelix-remove.com (Sarat Venugopal)
Date: Sun, 27 Feb 2005 00:34:27 +0800
Subject: getting at raw POST data?
References: <421fbaf9$1@nntp.zianet.com>
Message-ID: <4220a510$1@news.starhub.net.sg>

Erik Johnson wrote:
> I am trying to work with a program that is trying make an HTTP POST
> of text data without any named form parameter. (I don't know - is
> that a normal thing to do?)

Often, people do require abnormal things.

> I need to write a CGI program that
> accepts and processes that data. I'm not seeing how to get at data
> that's not a named form parameter.

As far as CGI is concerned, the POST data resides in stdin. So accessing it
is as simple as reading sys.stdin within the CGI script. Of course, it is up
to you to interpret the data, though you can just read everything as a
string. The POST data could just as well be binary - such as a file upload.

To dump the strings to a file to your webserver, try the following script:

import sys

print 'Content-type: text/plain\r\n\r\n'

dumped = open('test.txt', 'wb')
for line in sys.stdin.readline():
    dumped.write(line)

HTH,
Sarat Venugopal
www.huelix.com








From a at a.invalid  Tue Feb  8 15:11:14 2005
From: a at a.invalid (Timo Virkkala)
Date: Tue, 08 Feb 2005 20:11:14 GMT
Subject: python code with indention
In-Reply-To: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
Message-ID: <C19Od.889$Nk5.868@read3.inet.fi>

Xah Lee wrote:
> is it possible to write python code without any indentation?

1) Why in the name of Xah Lee would you even want to?
2) If you need to ask questions this simple, are you sure you are the right 
person to write tutorials?
3) Do you even read the replies you get?

--
Timo Virkkala


From timothy.williams at nvl.army.mil  Fri Feb 25 10:21:41 2005
From: timothy.williams at nvl.army.mil (timothy.williams at nvl.army.mil)
Date: 25 Feb 2005 07:21:41 -0800
Subject: problem installing wxPython 2.5.3, wxWidgets installed ok
Message-ID: <1109344901.877838.71280@o13g2000cwo.googlegroups.com>

I'm trying to install wxPython 2.5.3.1 using Python 2.3.2 on a Fedora 2
machine.

I have python in a non-standard place, but I'm using --prefix with the
configure script to point to where I have everything. The make install
in $WXDIR seemed to go fine. I have the libxw* libraries in my lib/
directory

libwx_base-2.5.so@            libwx_gtk_adv-2.5.so.3.0.0*
libwx_base-2.5.so.3@          libwx_gtk_core-2.5.so@
libwx_base-2.5.so.3.0.0*      libwx_gtk_core-2.5.so.3@
libwx_base_net-2.5.so@        libwx_gtk_core-2.5.so.3.0.0*
libwx_base_net-2.5.so.3@      libwx_gtk_gl-2.4.so@
libwx_base_net-2.5.so.3.0.0*  libwx_gtk_gl-2.4.so.0@
libwx_base_xml-2.5.so@        libwx_gtk_gl-2.4.so.0.1.1*
libwx_base_xml-2.5.so.3@      libwx_gtk_html-2.5.so@
libwx_base_xml-2.5.so.3.0.0*  libwx_gtk_html-2.5.so.3@
libwx_gtk-2.4.so@             libwx_gtk_html-2.5.so.3.0.0*
libwx_gtk-2.4.so.0@           libwx_gtk_xrc-2.5.so@
libwx_gtk-2.4.so.0.1.1*       libwx_gtk_xrc-2.5.so.3@
libwx_gtk_adv-2.5.so@         libwx_gtk_xrc-2.5.so.3.0.0*
libwx_gtk_adv-2.5.so.3@

I also have a wx/ directory under my lib. directory.

The problem is when I try to do a 'python setup.py install' in the
./wxPython directory.  I get a message about not finding a config file
for wx-config and then several errors during gcc compiles.

> python setup.py build
Found wx-config: /project/c4i/Users_Share/williams/Linux/bin/wx-config
    Using flags:  --toolkit=gtk2 --unicode=no --version=2.5

  Warning: No config found to match:
/project/c4i/Users_Share/williams/Linux/bin/wx-config --toolkit=gtk2
--unicode=no --version=2.5 --cxxflags
           in /project/c4i/Users_Share/williams/Linux/lib/wx/config
  If you require this configuration, please install the desired
  library build.  If this is part of an automated configuration
  test and no other errors occur, you may safely ignore it.
  You may use wx-config --list to see all configs available in
  the default prefix.

...

Preparing OGL...
Preparing STC...
Preparing GIZMOS...
running build
running build_py
copying wx/__version__.py -> build-gtk2/lib.linux-i686-2.3/wx
running build_ext
building '_core_' extension
creating build-gtk2/temp.linux-i686-2.3
creating build-gtk2/temp.linux-i686-2.3/src
creating build-gtk2/temp.linux-i686-2.3/src/gtk
gcc -pthread -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -fPIC -DSWIG_GLOBAL -DHAVE_CONFIG_H
-DWXP_USE_THREAD=1 -UNDEBUG -DXTHREADS -D_REENTRANT -DXUSE_MTSAFE_API
-Iinclude -Isrc -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include
-I/usr/X11R6/include -I/usr/include/atk-1.0 -I/usr/include/pango-1.0
-I/usr/include/freetype2 -I/usr/include/freetype2/config
-I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include
-I/project/c4i/Users_Share/williams/Linux/include/python2.3 -c
src/libpy.c -o build-gtk2/temp.linux-i686-2.3/src/libpy.o -O3
gcc -pthread -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -fPIC -DSWIG_GLOBAL -DHAVE_CONFIG_H
-DWXP_USE_THREAD=1 -UNDEBUG -DXTHREADS -D_REENTRANT -DXUSE_MTSAFE_API
-Iinclude -Isrc -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include
-I/usr/X11R6/include -I/usr/include/atk-1.0 -I/usr/include/pango-1.0
-I/usr/include/freetype2 -I/usr/include/freetype2/config
-I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include
-I/project/c4i/Users_Share/williams/Linux/include/python2.3 -c
src/gtk/_core_wrap.cpp -o
build-gtk2/temp.linux-i686-2.3/src/gtk/_core_wrap.o -O3
cc1plus: warning: command line option "-Wstrict-prototypes" is valid
for Ada/C/ObjC but not for C++
In file included from src/gtk/_core_wrap.cpp:400:
include/wx/wxPython/wxPython_int.h:19:19: wx/wx.h: No such file or
directory
include/wx/wxPython/wxPython_int.h:21:25: wx/busyinfo.h: No such file
or directory
include/wx/wxPython/wxPython_int.h:22:22: wx/caret.h: No such file or
directory
include/wx/wxPython/wxPython_int.h:23:25: wx/choicebk.h: No such file
or directory
include/wx/wxPython/wxPython_int.h:24:24: wx/clipbrd.h: No such file or
directory
include/wx/wxPython/wxPython_int.h:25:25: wx/colordlg.h: No such file
or directory
include/wx/wxPython/wxPython_int.h:26:23: wx/config.h: No such file or
directory
include/wx/wxPython/wxPython_int.h:27:23: wx/cshelp.h: No such file or
directory
include/wx/wxPython/wxPython_int.h:28:25: wx/dcmirror.h: No such file
or directory
include/wx/wxPython/wxPython_int.h:29:21: wx/dcps.h: No such file or
directory
include/wx/wxPython/wxPython_int.h:30:24: wx/dirctrl.h: No such file or
directory
include/wx/wxPython/wxPython_int.h:31:23: wx/dirdlg.h: No such file or
directory
include/wx/wxPython/wxPython_int.h:32:20: wx/dnd.h: No such file or
directory
include/wx/wxPython/wxPython_int.h:33:24: wx/docview.h: No such file or
directory
include/wx/wxPython/wxPython_int.h:34:24: wx/encconv.h: No such file or
directory
include/wx/wxPython/wxPython_int.h:35:25: wx/fdrepdlg.h: No such file
or direct

...

Why isn't there a -I../include switch on the compile line, and how do I
reconfigure it so it does?

Thanks for any help.



From alefnula at gmail.com  Wed Feb 16 09:19:27 2005
From: alefnula at gmail.com (Viktor)
Date: 16 Feb 2005 06:19:27 -0800
Subject: Stable GUI
Message-ID: <c0e7fd79.0502160619.565eb40e@posting.google.com>

Which GUI is the most stable one? I don't need any fancy looking
widgets (look and feel doesn't realy matter to me), I "just" need it
to be rock stable and fast...


From harlinseritt at yahoo.com  Sun Feb 27 10:07:11 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 27 Feb 2005 07:07:11 -0800
Subject: Googlewhacker
In-Reply-To: <4221b704$0$8752$db0fefd9@news.zen.co.uk>
References: <4221b671$0$8752$db0fefd9@news.zen.co.uk>
	<4221b704$0$8752$db0fefd9@news.zen.co.uk>
Message-ID: <1109516831.755068.208910@l41g2000cwc.googlegroups.com>

They actually won't ban your IP for this. They only limit your number
of searches per day. I discovered this once when I used
http://www.google.com as a test metric for my network monitoring
program. I do like your script though.

Regards,

Harlin



From steve at holdenweb.com  Tue Feb  8 16:32:38 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 08 Feb 2005 16:32:38 -0500
Subject: python code with indention
In-Reply-To: <C19Od.889$Nk5.868@read3.inet.fi>
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
	<C19Od.889$Nk5.868@read3.inet.fi>
Message-ID: <42092FF6.7040204@holdenweb.com>

Timo Virkkala wrote:

> Xah Lee wrote:
> 
>> is it possible to write python code without any indentation?
> 
> 
> 1) Why in the name of Xah Lee would you even want to?
> 2) If you need to ask questions this simple, are you sure you are the 
> right person to write tutorials?
> 3) Do you even read the replies you get?
> 
Surely by now it's obvious that Xah Lee is an output-only device. Please 
do not feed the troll.

regards
  Steve



From robin at reportlab.com  Fri Feb 25 11:04:12 2005
From: robin at reportlab.com (Robin Becker)
Date: Fri, 25 Feb 2005 16:04:12 +0000
Subject: Is there way to determine which class a method is bound to?
In-Reply-To: <a8bfd74c05022506466cd6d3fc@mail.gmail.com>
References: <a8bfd74c05022506466cd6d3fc@mail.gmail.com>
Message-ID: <421F4C7C.6040204@chamonix.reportlab.co.uk>

Victor Ng wrote:
> I'm doing some evil things in Python and I would find it useful to
> determine which class a method is bound to when I'm given a method
> pointer.
> 
> For example:
> 
> class Foo(object):
>     def somemeth(self):
>         return 42
> 
> class Bar(Foo):
>     def othermethod(self):
>         return 42
> 
> 
> Is there some way I can have something like :
>   
>    findClass(Bar.somemeth) 
> 
> that would return the 'Foo' class, and 
> 
>    findClass(Bar.othermethod)
> 
> would return the 'Bar' class?
> 
> vic
I think you can use the mro function


 >>> class Foo(object):
... 	def somemeth(self):
... 		pass
...
 >>> class Bar(Foo):
... 	def othermeth(self):
... 		pass
...
 >>> def findClass(meth):
... 	for x in meth.im_class.mro():
... 		if meth.im_func in x.__dict__.values(): return x
...
 >>> findClass(Bar.somemeth)
<class '__main__.Foo'>
 >>> findClass(Bar.othermeth)
<class '__main__.Bar'>
 >>>

-- 
Robin Becker



From belred at gmail.com  Mon Feb 21 11:51:31 2005
From: belred at gmail.com (Bryan)
Date: Mon, 21 Feb 2005 08:51:31 -0800
Subject: python2.4 generator expression > python2.3 list expression
In-Reply-To: <0ioj11dsgqhatqc3d7ldeb35rta6d9fk69@4ax.com>
References: <mailman.2882.1108961815.22381.python-list@python.org>	<m2oeee5e2k.fsf@unique.fully.qualified.domain.name.yeah.right>
	<0ioj11dsgqhatqc3d7ldeb35rta6d9fk69@4ax.com>
Message-ID: <cvd3bv$3ii$1@sea.gmane.org>

Christos TZOTZIOY Georgiou wrote:
> On 21 Feb 2005 06:48:19 -0500, rumours say that Dan Sommers <me at privacy.net>
> might have written:
> 
> [snip: snacktime posts code to count bits]
> 
> 
>>>Seems to work, is there a better way to do this?
> 
> 
> [Dan]
> 
>>for c in range( 128 ):
>>   even_odd = 0
>>   print '%3d' % c,
>>   while c:
>>       c &= c - 1
>>       even_odd = not even_odd
>>   print int( even_odd )
> 
> 
> Just for the sake of people who haven't messed with bit manipulation in C or
> assembly, the effect of
> 
> c &= c - 1
> 
> is to reset the rightmost (less significant) '1' bit of a number (ie change it
> to '0').

i tried c &= c - 1 but i'm not getting the least significant or rightmost bit 
reset to zero.  am i misunderstanding something?

 >>> 2 & 1  # 2 = 0x10; reset right most would be 0x10
0
 >>> 10 & 9 # 10 = 0x1010; reset right most would be 0x1010
8

bryan



From xah at xahlee.org  Mon Feb  7 14:39:11 2005
From: xah at xahlee.org (Xah Lee)
Date: 7 Feb 2005 11:39:11 -0800
Subject: python code with indention
Message-ID: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>

is it possible to write python code without any indentation?

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From mefjr75 at hotmail.com  Sat Feb  5 00:40:27 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 4 Feb 2005 21:40:27 -0800
Subject: changing local namespace of a function
In-Reply-To: <cu13vi$ji7$1@joe.rice.edu>
References: <cu0lru$8ik$1@joe.rice.edu>
	<1107550212.114358.281200@z14g2000cwz.googlegroups.com>
	<cu13vi$ji7$1@joe.rice.edu>
Message-ID: <1107582027.700961.156800@f14g2000cwb.googlegroups.com>

I quote myself :
> Also try this stuff out in an interpreter session it is easy and fast
> to get your own answers.
Sorry I guess I should have added a nudge and a <.5 wink> at the end.
Sometimes misinformation is just what we need to get our own answers!
The absurdity of what you are doing led me to give you that piece of
advice.
It seems if I had just told you to RTF you would not have learned as
much.
I have been out so did not respond earlier, but I see others have given
you other useful information. There is no reason to make these local
epecially if they are large , leave them in the dictionary they come in
and acess the members as needed. I really don't see your need.
M.E.Farmer



From fredrik at pythonware.com  Mon Feb 14 13:44:53 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 19:44:53 +0100
Subject: nested lists as arrays
References: <b35e3308.0502140835.53d3d9b2@posting.google.com><mailman.2545.1108401033.22381.python-list@python.org>
	<1108405326.819090.219970@l41g2000cwc.googlegroups.com>
Message-ID: <cuqre4$pul$1@sea.gmane.org>

benjamin.cordes at blawrc.de wrote:

> Allright. What difference in runtime and space would it make using
> dictionaries instead?

is this for an interactive game?  if so, the answer is "none at all".

(on my machine, you can make about 6000000 dict[x,y] accesses per
second, compared to 7500000 list[x][y] accesses...  assuming that your
algorithm needs to check each cell on the board 10 times per move, and
you want the moves to appear "instantly", the slower solution should be
fast enough for a 250x250 board, compared to a 270x270 board for the
faster solution...).

</F> 





From sunriselee2002 at yahoo.com  Sun Feb 27 00:59:14 2005
From: sunriselee2002 at yahoo.com (sunriselee)
Date: Sun, 27 Feb 2005 00:59:14 -0500
Subject: parse lines to name value pairs
Message-ID: <94c18f5a4bd6cad273a40299b1b137e8@localhost.talkaboutprogramming.com>

Hi all,

I want to parse some string lines into name value pairs, where the value
will be a list. Here are some sample lines:

line1 = """path {{data/tom} C:/user/john}"""
line2 = """books{{book music red} {book {math 1}
blue} {book {tom's book} green}}"""

For line1, the name is "path", the name-value should be the following
forms:

["path", ["data/tom", "C:/user/john"]]

For line 2, the name is "books", and the value should be a list in either
one of the following forms (either one is ok):

["books", [["book","music","red"],["book","math 1","blue"],["book", "tom's
book", "green"]]]

or

["books", ["book","music","red","book","math 1","blue","book", "tom's
book", "green"]]

Any ideas?

Many thanks!



From yyusenet at yahoo.com  Thu Feb 10 21:15:18 2005
From: yyusenet at yahoo.com (YYUsenet)
Date: Thu, 10 Feb 2005 19:15:18 -0700
Subject: [perl-python] combinatorics fun
In-Reply-To: <1108075884.250995.62520@g14g2000cwa.googlegroups.com>
References: <1108075884.250995.62520@g14g2000cwa.googlegroups.com>
Message-ID: <cuh4fq$p2l$1@news.xmission.com>

Xah Lee wrote:
> a year ago i wrote this perl program as part of a larger program.
> 
> as a exercise of fun, let's do a python version. I'll post my version
> later today.
  [code snipped]
> 
> This is Perl-Python a-day. To subscribe, see
> http://xahlee.org/perl-python/python.html
> 
> Xah
> xah at xahlee.org
> http://xahlee.org/PageTwo_dir/more.html
> 

Why are you posting this to comp.lang.python? This obviously has nothing 
to do with python at all.  If you are trying to teach people python, 
claiming that "...let's do a python version. I'll post my version later 
today."  Isn't really the proper way to do it.  An even better method 
would be to set up a website dedicated to nothing but it, and stop 
posting here with garbage code that no one wants to read, and that helps 
no one.  Please, consider others a little bit when you go off on your 
wild hope that you might be able to teach other people what you 
obviously know nothing about, teaching people from a language that you 
know nothing about.   *PLEASE STOP POSTING*!! *NOBODY WANTS YOU TO POST*!!

-- 
yyusenet (at) xmission (dot) com


From BOOGIEMANPN at YAHOO.COM  Sat Feb 12 16:16:53 2005
From: BOOGIEMANPN at YAHOO.COM (BOOGIEMAN)
Date: Sat, 12 Feb 2005 22:16:53 +0100
Subject: Alternative to raw_input ?
References: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>
	<mailman.2400.1108139722.22381.python-list@python.org>
	<w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>
	<cuio9f$13k8$1@ns.felk.cvut.cz>
	<ckkuclxhhrv7$.1lqqmenvnqvg5$.dlg@40tude.net>
	<MKSdnYiccMgv8ZDfRVn-hg@powergate.ca>
Message-ID: <my27ag7r6ca1$.wfp66yydaeqw$.dlg@40tude.net>

On Fri, 11 Feb 2005 21:38:47 -0500, Peter Hansen wrote:

> print prompt
> while msvcrt.kbhit():
>      msvcrt.getch()
> msvcrt.getch()

Thanks, it works but without line "print prompt" and also
I'm not sure if I should put this function :

def cekaj():
    while msvcrt.kbhit():
        msvcrt.getch()
    msvcrt.getch()

#Or this one, which sounds more logical according to help
#kbhit() - Return true if a keypress is waiting to be read. 

def cekaj():
    msvcrt.getch()
    while msvcrt.kbhit():
        msvcrt.getch()
     
It works both ways, not sure which one is right


From bill.mill at gmail.com  Fri Feb  4 15:36:49 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Fri, 4 Feb 2005 15:36:49 -0500
Subject: string issue
In-Reply-To: <cu0ln1$o5t$1@solaris.cc.vt.edu>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
	<36QMd.103084$Jk5.36127@lakeread01> <87lla4w0av.fsf@pobox.com>
	<cu0ln1$o5t$1@solaris.cc.vt.edu>
Message-ID: <797fe3d405020412362a30500e@mail.gmail.com>

On Fri, 04 Feb 2005 15:25:04 -0500, rbt <rbt at athop1.ath.vt.edu> wrote:
> John J. Lee wrote:
> > Steve Holden <steve at holdenweb.com> writes:
> > [...]
> >
> >>You are modifying the list as you iterate over it. Instead, iterate
> >>over a copy by using:
> >>
> >>for ip in ips[:]:
> >>   ...
> >
> >
> > Just to help popularise the alternative idiom, which IMO is
> > significantly less cryptic (sane constructors of mutable objects
> > almost always make a copy, and list is no exception: it's guaranteed
> > to do so):
> >
> > for ip in list(ips):
> >    ...
> >
> >
> > Works back to at least Python 1.5.2.
> >
> >
> > John
> 
> I don't know that that approach is less cryptic. ips is already a
> list... it looks cryptic to make it a list again, doesn't it? IMO, the
> two are equally cryptic. The epitome of clarity would be copy(ips)...
> now *that* makes sense, of course, ips[:] or list(ips) work equally well
> to the programmer who has learned them.

Howsabout:

>>> from copy import copy
>>> ips = ['255.255.255.255', '128.173.120.79', '198.82.247.98',
... '127.0.0.1', '255.0.0.0', '255', '128.173.255.34']
>>> for ip in copy(ips):
...     if '255' in ip:
...             ips.remove(ip)
...
>>> ips
['128.173.120.79', '198.82.247.98', '127.0.0.1']

But I still think that the list comprehension is the best.

Peace
Bill Mill
bill.mill at gmail.com

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


From donnal at donnal.net  Mon Feb  7 09:39:18 2005
From: donnal at donnal.net (Donnal Walter)
Date: Mon, 07 Feb 2005 08:39:18 -0600
Subject: AsciiDoc 6.0.0
In-Reply-To: <4204241E.6010504@methods.co.nz>
References: <4204241E.6010504@methods.co.nz>
Message-ID: <cu7ugb$h64$1@sea.gmane.org>

Stuart Rackham wrote:
> AsciiDoc
> --------
> AsciiDoc is an uncomplicated text document format for writing short
> documents, articles, books and UNIX man pages.
> 
> AsciiDoc files can be translated to HTML (with or without
> stylesheets), DocBook (articles, books and refentry documents)
> and LinuxDoc using the asciidoc(1) command.

Lately I've been thinking about using reStructuredText for creating 
simple web pages. Should I consider AsciiDoc as an alternative, and if 
so, what are its advantages by comparison? Thanks.

Donnal Walter




From BOOGIEMANPN at YAHOO.COM  Fri Feb 11 15:36:38 2005
From: BOOGIEMANPN at YAHOO.COM (BOOGIEMAN)
Date: Fri, 11 Feb 2005 21:36:38 +0100
Subject: Alternative to raw_input ?
References: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>
	<mailman.2400.1108139722.22381.python-list@python.org>
	<w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>
	<cuio9f$13k8$1@ns.felk.cvut.cz>
Message-ID: <ckkuclxhhrv7$.1lqqmenvnqvg5$.dlg@40tude.net>

On Fri, 11 Feb 2005 18:00:08 +0100, den wrote:

> Did you try this:
> 
> import msvcrt
> msvcrt.getch()

Yes, that's what I need. Thank you.
BTW, sometimes program continues 
without me pressing any button, why ? 


From fuzzyman at gmail.com  Mon Feb 28 09:07:46 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 28 Feb 2005 06:07:46 -0800
Subject: How do you control _all_ items added to a list?
In-Reply-To: <1109599026.828317.297700@z14g2000cwz.googlegroups.com>
References: <1109599026.828317.297700@z14g2000cwz.googlegroups.com>
Message-ID: <1109599666.643466.239700@l41g2000cwc.googlegroups.com>


Xif wrote:
> Hi
>
> I want to have control over all items added to a list.
>
> The first attempt was to subclass list and override its .append()
> method.
>
> Problem is, there are plenty of other ways the list can have items
> added to it - e.g. extend, insert - and theyr'e not at all affected
by
> the changes I made to append.
>
> Is there some "base" item-adding method that all other item-adding
> methods use, so I can override it and have the changes affect all
> item-adding functions?
>

If you subclass list then you will need to override all methods that
can set items. This is because the built in methods work directly with
the internal structure and are implemented in C. It's a bit of a
pain... but not that much.

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml

> Thanks,
> Xif



From jerf at jerf.org  Wed Feb  2 16:29:04 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Wed, 02 Feb 2005 16:29:04 -0500
Subject: Integrated Testing - Peppable?
References: <1107373949.960435.212020@z14g2000cwz.googlegroups.com>
Message-ID: <pan.2005.02.02.21.29.03.688303@jerf.org>

On Wed, 02 Feb 2005 11:52:29 -0800, carl.manaster at gmail.com wrote:
> So...  Should I turn this into a PEP?

I would think a much more productive step one would be to put together the
proposed functionality with unittest and the trace module, and use the
output of your tool to drive some sort of simple output showing what you
are talking about. (Putting together a Tk app to show coverage would be
pretty simple as long as you don't try to get too fancy.)

I'm not too optimistic about ever seeing this in the language, but without
an implementation, I think it's about 0 likelihood. But remember, that's
just my opinion.

You need the experience you'll get from the implementation to write a PEP
that has a prayer of acceptance.

At least with a tool, worst case scenario, your PEP is rejected and you
put together a module to do it anyways. If you get enough people to use
it, you might at least get the module into the standard lib, though that
is also another big step.

No prose can compare to a live, functional demonstration. I, for instance,
am not *certain* this would be useful, but I think it is the sort of thing
that if I got a taste of it I might fall in love with. (Coverage is, of
course, not a sufficient condition to know your testing is complete, but
it is a necessary one, and a graphical readout with uncovered lines
colored bright red could be quite interesting and useful, even if it isn't
initially integrated into anything.)


From fredrik at pythonware.com  Tue Feb  8 07:35:57 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 13:35:57 +0100
Subject: Choosing the right parser for parsing C headers
References: <1107861023.254610.14310@g14g2000cwa.googlegroups.com><mailman.2161.1107861785.22381.python-list@python.org>
	<1107865641.937691.282930@g14g2000cwa.googlegroups.com>
Message-ID: <cuabkq$8uh$1@sea.gmane.org>

Jean de Largentaye wrote:

> GCC-XML looks like a very interesting alternative, as Python includes
> tools to parse XML.
> The mini-C compiler looks like a step in the right direction for me.
> I'm going to look into that.
> I'm not comfortable with C++ yet, and am not sure how I'd use Pyste.

to clarify, Pyste is a Python tool that uses GCCXML to generate bindings; it might
not be something that you can use out of the box for your project, but it's definitely
something you should study, and perhaps borrow implementation ideas from.

</F> 





From ulrich.schaefer at dfki.de  Thu Feb 24 03:18:24 2005
From: ulrich.schaefer at dfki.de (Ulrich Schaefer)
Date: Thu, 24 Feb 2005 09:18:24 +0100
Subject: Communication between JAVA and python
In-Reply-To: <421d137e$1_1@newspeer2.tds.net>
References: <421ce234$0$12950$626a14ce@news.free.fr>
	<421d137e$1_1@newspeer2.tds.net>
Message-ID: <cvk2kh$ajnct$1@hades.rz.uni-saarland.de>

Jacques Daussy wrote:

>> Hello
>> How can I transfert information between a JAVA application and a 
>> python script application. I can't use jython because, I must use 
>> python interpreter.I think to socket or semaphore, but can I use it 
>> on Windows plateform ?
>
Try XML-RPC (a simple implementation of remote procedure call via HTTP 
sockets).
It's built-in in Python since 2.2 
(http://www.python.org/doc/2.4/lib/module-xmlrpclib.html),
in Java use e.g. Apache XML-RPC (http://ws.apache.org/xmlrpc/).

Ulrich


From caleb1 at telkomsa.net  Wed Feb  9 23:46:59 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Wed, 09 Feb 2005 23:46:59 -0500
Subject: Python versus Perl ?
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>	<hkhc01dnpmmhn980quijqil40653qipdki@4ax.com>	<cuavn1$bag$1@nntp.msstate.edu>	<opslwvc2wx1js0xs@news.telkomsa.net>	<mailman.2218.1107902435.22381.python-list@python.org>
	<1107930486.318280.251010@l41g2000cwc.googlegroups.com>
	<mailman.2258.1107971477.22381.python-list@python.org>
Message-ID: <opslyswlzg1js0xs@news.telkomsa.net>

Joe, thanks

Yes, I am on the P4D mailing list :)  What you didn't say was that the  
"python for delphi" extensions are *awesome*.  full two-way communication,  
and you get it all by drag&dropping a little component widget onto your  
form in the IDE.  Amazing.

However...

Dll's can be used by things other than python, which is the main reason  
why we would go that route.  However, with all the .NET hoopla,  maybe  
IronPython and a .NET dll would be the way to go in the future.  I'm still  
a little uneasy about adopting .NET as a standard just yet...

I should give it some more thought anyways.

Thanks again
Caleb

On Wed, 09 Feb 2005 12:38:37 -0500, Joe Francia  
<gmane-schpam at joefrancia.com> wrote:

> Caleb Hattingh wrote:
>> As you might imagine, I think about this constantly.  However, there
>> are many other issues that make it complicated, such as having to work
>> in a team where the average guy knows pascal well (we're just a bunch
>> of chemical engineers), but has never even heard of python.  Plus, were
>> I to go this type of route, I would almost definitely code the binary
>> modules in Delphi or FreePascal, make a DLL and use ctypes to call it.
>> I do not know C and have no desire to learn now :)    On the other
>> hand, I know pascal quite well.
>>  keep well
>> Caleb
>>
>
> You could always code Python extensions directly in Delphi:
>
> http://membres.lycos.fr/marat/delphi/python.htm
> http://www.atug.com/andypatterns/PythonDelphiLatest.htm
>
> Demo09 (look in demodll.dpr & module.pas) in the download tells you how.
>
> Peace,
> Joe
>



From snail at objmedia.demon.co.uk  Mon Feb 14 14:51:44 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Mon, 14 Feb 2005 19:51:44 +0000
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupupa$kfs$2@usenet.otenet.gr>
	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>
	<cuqqqi$ep1$1@ctb-nnrp2.saix.net>
	<1108407625.250592.104280@c13g2000cwb.googlegroups.com>
	<jN0XedqDmPECFwnz@objmedia.demon.co.uk>
	<1108409476.874751.16600@l41g2000cwc.googlegroups.com>
Message-ID: <gjA3VcsQFQECFw0m@objmedia.demon.co.uk>

In message <1108409476.874751.16600 at l41g2000cwc.googlegroups.com>, Pat 
<pobrien at orbtech.com> writes
>if I have both versions of Python installed - 2.3.5 and 2.4?  Is there
>an easy way to detect this and switch between the two dlls?

Easy? Depends what you call easy.

a) You just need to detect if pythonNN.dll is implicitly linked to 
msvcrt.dll or msvcrXX.dll (where XX indicates a VS studio number, 
currently XX can only be 71, but if Python is done for Visual Studio 
2005 (8.0) then XX may also have a value of 80).

b) GetModuleHandle(name of DLL from a) to get the DLL handle.

c) GetProcAddress on the respective to get the C runtime function you 
want to call (for example, fopen).

d) call the function.

You either need (a) or all of (a)...(d) depending on what you are doing. 
Those embedding Python but no idea of the Python version in advance will 
do the latter.

>If I'm asking questions already answered elsewhere, I'd love a link to
>that resource, if you have it.

I'm probably not the best person to answer such a question. I'm mainly a 
C/C++ (with Java under protest) person dabbling in Python/Ruby.

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From fredrik at pythonware.com  Mon Feb 14 06:02:54 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 12:02:54 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<cup249$svu$1@gemini.csx.cam.ac.uk><cupqb6$1oi$1@usenet.otenet.gr>
	<cups17$kbs$1@gemini.csx.cam.ac.uk> <cupvmh$os2$1@usenet.otenet.gr>
Message-ID: <cuq0cj$me4$1@sea.gmane.org>

Ilias Lazaridis wrote

> The idea that the Python Foundation cares about user needs would affect that.

please let the users speak for themselves.

</F> 





From michele.simionato at gmail.com  Sun Feb 20 03:53:45 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 20 Feb 2005 00:53:45 -0800
Subject: recommended way of generating HTML from Python
Message-ID: <1108889625.068929.88890@z14g2000cwz.googlegroups.com>

What is the recommended way of generating HTML from Python? I know of
HTMLGen and of
few recipes in the Cookbook, but is there something which is more or
less standard?
Also, are there plans to include a module for HTML generation in the
standard library?
I really would like to see some standardization in this area.

          Michele Simionato



From steve at holdenweb.com  Thu Feb  3 07:36:11 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 03 Feb 2005 07:36:11 -0500
Subject: IDLE history, Python IDE, and Interactive Python with Vim
In-Reply-To: <opsllujcprej1m1c@ashot>
References: <opsllommgvb1cml1@ashot>
	<1d6cdae305020219434e814e86@mail.gmail.com>
	<mailman.1793.1107405675.22381.python-list@python.org>
	<opsllujcprej1m1c@ashot>
Message-ID: <9_oMd.102683$Jk5.16356@lakeread01>

Ashot wrote:

> WingIDE looks nice though, and it seems that the interactive shell is  
> built in from the screenshots.  Can you run a program to a certain 
> point  break point and use the shell?
> 
Indeed you can - there's an interpreter available that executes in the 
context of the current stack frame when you reach a breakpoint. It's a 
great way to find out what's going on.

[But don't I remember that IDLE can do that too? ...]

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From cam.ac.uk at mh391.invalid  Mon Feb 14 05:43:09 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Mon, 14 Feb 2005 10:43:09 +0000
Subject: changing __call__ on demand
In-Reply-To: <cuo309$5fm$1@lnx107.hrz.tu-darmstadt.de>
References: <cuo0e1$4l2$1@lnx107.hrz.tu-darmstadt.de>
	<cuo1op$m6h$1@gemini.csx.cam.ac.uk>
	<cuo309$5fm$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <cupvc0$rfv$1@gemini.csx.cam.ac.uk>

Stefan Behnel wrote:
> 
> Thanks for the quick answer. I didn't know they were class-level 
> methods. Too bad. Guess I'll stick with indirection then.

Here is one way of doing that indirection I just thought of--have
the class __call__ attribute call on the instance __call__
attribute:

 >>> class MyClass(object):
...     def __init__(self, func):
...             self.__call__ = func
...     def __call__(self, *args, **keywds):
...             return self.__call__(*args, **keywds)
...
 >>> def f1(): return "foo"
...
 >>> def f2(x, y): return x+y
...
 >>> MyClass(f1)()
'foo'
 >>> MyClass(f2)(30, 12)
42

I still can't figure out whether this is elegant, or opaque and
to be avoided. <wink>
-- 
Michael Hoffman


From gabriel.cooper at mediapulse.com  Fri Feb 11 14:23:17 2005
From: gabriel.cooper at mediapulse.com (Gabriel Cooper)
Date: Fri, 11 Feb 2005 14:23:17 -0500
Subject: Python UPS / FedEx Shipping Module
Message-ID: <420D0625.2020408@mediapulse.com>

I've made UPS and FedEx shipping rate request modules in python using 
XML. Is there an interest in putting this on the web?


From ncoghlan at iinet.net.au  Sat Feb 26 23:14:55 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 27 Feb 2005 14:14:55 +1000
Subject: string methods (warning, newbie)
In-Reply-To: <A7B5C22F20EE3C4E95744E2F03F1887F380869@MAYOR.retzlaff.com>
References: <A7B5C22F20EE3C4E95744E2F03F1887F380869@MAYOR.retzlaff.com>
Message-ID: <4221493F.5060602@iinet.net.au>

Jimmy Retzlaff wrote:
> The approach you are considering may be easier than you think:
> 
> 
>>>>filter(str.isalpha, 'The Beatles - help - 03 - Ticket to ride')
> 
> 'TheBeatleshelpTickettoride'

Hmm, I think this is a case where filter is significantly clearer than the 
equivalent list comprehension:

Py> "".join([c for c in 'The Beatles - help - 03 - Ticket to ride' if c.isalpha(
)])
'TheBeatleshelpTickettoride'
Py>

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From greg at cosc.canterbury.ac.nz  Fri Feb 11 00:21:27 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Fri, 11 Feb 2005 18:21:27 +1300
Subject: :-)
In-Reply-To: <MEC*OHUGq@news.chiark.greenend.org.uk>
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
	<s9zvf93ovp8.fsf@salmakis.intevation.de>
	<pan.2005.02.08.12.47.00.135408@jerf.org>
	<36vm80F554hv7U1@individual.net>
	<MEC*OHUGq@news.chiark.greenend.org.uk>
Message-ID: <372tn2F5998g4U1@individual.net>

Sion Arrowsmith wrote:
> Greg Ewing  <greg at cosc.canterbury.ac.nz> wrote:
> 
>>As a fellow named Church once pointed out, lambdas are really
>>*all* you need in a language...
> 
> 
> ... where as others argue that it is impractical not to have
> some form of runtime data storage, thereby giving rise to the
> separation of Church and state.
> 


-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From bvande at po-box.mcgill.ca  Fri Feb  4 13:31:15 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Fri, 04 Feb 2005 13:31:15 -0500
Subject: returning True, False or None
In-Reply-To: <1grh3fe.1km48v56sadeyN%aleaxit@yahoo.com>
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
	<1grh3fe.1km48v56sadeyN%aleaxit@yahoo.com>
Message-ID: <4203BF73.80507@po-box.mcgill.ca>

Alex Martelli said unto the world upon 2005-02-04 13:02:
> Steven Bethard <steven.bethard at gmail.com> wrote:
> 
> 
>>I have lists containing values that are all either True, False or None,
>>e.g.:
>>
>>     [True,  None,  None,  False]
>>     [None,  False, False, None ]
>>     [False, True,  True,  True ]
>>     etc.
>>
>>For a given list:
>>* If all values are None, the function should return None.
>>* If at least one value is True, the function should return True.
>>* Otherwise, the function should return False.
>>
>>Right now, my code looks like:

<SNIP OP's code>

>>This has a light code smell for me though -- can anyone see a simpler
>>way of writing this?
> 
> 
> What about...:
> 
> for val in lst:
>     if val is not None:
>         return val
> return None
> 
> or the somewhat fancy/clever:
> 
> for val in (x for x in lst if x is not None):
>     return val
> return None
> 
> 
> Alex

These don't do what the OP desired.

.>>> test_case = [False, True,  True,  True ]
.>>> def alexs_funct(lst):
.        for val in lst:
.            if val is not None:
.                return val
.        return None

 >>> alexs_funct(test_case)
False

But, by the 'spec', it ought return True.

Best,

Brian vdB
A mere newbie, quite pleased with himself for finding a problem with 
'bot code -- next scheduled to occur mid 2011 :-)



From fuzzyman at gmail.com  Mon Feb 14 04:44:34 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 14 Feb 2005 01:44:34 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cupqb6$1oi$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr><cup249$svu$1@gemini.csx.cam.ac.uk>
	<cupqb6$1oi$1@usenet.otenet.gr>
Message-ID: <1108374274.207311.155780@l41g2000cwc.googlegroups.com>


Ilias Lazaridis wrote:
[snip..]
> >> b) Why does the Python Foundation not ensure, that the python
> >> source-code is directly compilable with MinGW?
> >
> > Why should they? It already runs on Windows with a freely available

> > compiler.
>
> Obvious: Courtesy [against the userbase needs]
>
> Obvious: Consistency [same code-base across different compiler]
>

Are you aware that the MSVC compiler they use produces tighter code
than gcc ? [1] *Most* users would rather have a faster python than a
python built with an open source compiler.

Particularly as distutils (read Python) can *easily* be configured to
use mingw to build extensions from source - which seems to be your real
requirement.

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shmtl



[snip..]
> --
> http://lazaridis.com

[1] Not knocking gcc - it's just optimsied for portability rather than
speed. If you want to see *a* benchmark, there is a link to one in my
'upgrading python' article. (In the article section at
http://www.voidspace.org.uk/python/index.shmtl )



From timothy.grant at gmail.com  Thu Feb 24 16:11:33 2005
From: timothy.grant at gmail.com (Timothy Grant)
Date: Thu, 24 Feb 2005 13:11:33 -0800
Subject: More newbie macosx user questions
Message-ID: <e775286d0502241311610bab0a@mail.gmail.com>

I think I'm mis-understanding something about how PYTHONPATH works (at
least on OSX I didn't have this trouble on Linux).

I have a directory where I store libraries that I'm playing around
with. However, for some reason python can't find the library. Since
I'm using PyQt, I use pythonw, but the results are identical with
python. It doesn't look like my PYTHONPATH is getting prepended to the
library path.

Can anyone tell me what I'm doing wrong?

(timothygrant at bastard%) echo $PYTHONPATH 
/Users/timothygrant/code/lib
(timothygrant at bastard%) ls $PYTHONPATH
NJB.py    NJB.pyc   _njb_c.so njb_c.py  njb_c.pyc
(timothygrant at bastard%) pythonw
Python 2.3 (#1, Sep 13 2003, 00:49:11) 
[GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import NJB
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: No module named NJB
>>> import sys
>>> for p in sys.path:
...     print p
... 

/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python23.zip
/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3
/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/plat-darwin
/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/plat-mac
/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/plat-mac/lib-scriptpackages
/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/lib-tk
/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/lib-dynload
/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages


From cam.ac.uk at mh391.invalid  Sun Feb 13 12:11:50 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sun, 13 Feb 2005 17:11:50 +0000
Subject: changing __call__ on demand
In-Reply-To: <cuo0e1$4l2$1@lnx107.hrz.tu-darmstadt.de>
References: <cuo0e1$4l2$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <cuo1op$m6h$1@gemini.csx.cam.ac.uk>

Stefan Behnel wrote:
> Is there a way to change __call__ after class creation?

__call__, like __getitem__, and __getattr__ is called on the
class object, not the instance object. So, no, not as far as I
am aware, without using metaclass trickery. The simplest option
IMO is to use another level of indirection as you suggest.
-- 
Michael Hoffman


From martin at v.loewis.de  Sun Feb 13 14:44:38 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 13 Feb 2005 20:44:38 +0100
Subject: sre is broken in SuSE 9.2
In-Reply-To: <cuke1o$fo4$1@news.comcor-tv.ru>
References: <mailman.2299.1108029731.22381.python-list@python.org>
	<1108060527.378911.146240@o13g2000cwo.googlegroups.com>
	<420D4D9A.40201@v.loewis.de> <cuke1o$fo4$1@news.comcor-tv.ru>
Message-ID: <420FAE26.6020700@v.loewis.de>

Serge Orlov wrote:
> Emphasis is mine. So how many libc implementations with
> non-unicode wide-character codes do we have in 2005?

Solaris has supported 2-byte wchar_t implementations for many
years, and so I believe did HP-UX and AIX.

ISO C99 defines a constant __STDC_ISO_10646__ which an
implementation can use to indicate that wchar_t uses
Unicode (aka ISO 10646) in all locales. Very few
implementations define this constant at this time, though.

Regards,
Martin


From python at hope.cz  Wed Feb 16 04:46:39 2005
From: python at hope.cz (Lad)
Date: 16 Feb 2005 01:46:39 -0800
Subject: MYSQL - how to install ?
Message-ID: <1108547199.260223.211450@f14g2000cwb.googlegroups.com>

I use XP windows and Python 2.3. How can I install MYSQL on my
computer? I could not find any installer for MYSQL and Python 2.3
Thanks for help
Lad.



From mlescault91967 at aol.com  Mon Feb 28 11:29:39 2005
From: mlescault91967 at aol.com (mike)
Date: Mon, 28 Feb 2005 11:29:39 -0500
Subject: NEED MONEY FOR FAMILY MATTERS
Message-ID: <cvvh66$2q5s@bee.cs.kiev.ua>

HI
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started making money for the rest of my life after i got into my own business
but I wish I had started many years ago, check it out for yourself
you'll be HAPPY you did. This site changed my life and my families
and it will change yours.

COPY AND PAST THIS SITE
http://www.mach90.com/pre.asp?username=mad4701


From neutrinman at myrealbox.com  Thu Feb 24 11:34:09 2005
From: neutrinman at myrealbox.com (neutrinman at myrealbox.com)
Date: 24 Feb 2005 08:34:09 -0800
Subject: what is wrong?
Message-ID: <1109262849.733430.13020@f14g2000cwb.googlegroups.com>

I cannot find out why the following code generates the error:
Traceback (most recent call last):
  File "D:/a/Utilities/python/ptyhon22/test.py", line 97, in ?
    main()
  File "D:/a/Utilities/python/ptyhon22/test.py", line 60, in main
    crit = Critter(crit_name)
  File "D:/a/Utilities/python/ptyhon22/test.py", line 8, in __init__
    self.feed = feed            # I wrote this
AttributeError: can't set attribute

I add some codes to a program on a book. The lines that have "I wrote
this" comment is the added codes. Could anyone tell me what is worng
here?

--------------
##
class Critter(object):
    """A virtual pet"""
    def __init__(self, name, hunger = 0, boredom = 0, feed = 0):
        self.name = name
        self.hunger = hunger
        self.boredom = boredom
        self.feed = feed            # I wrote this

    def __pass_time(self):
        self.hunger += 1
        self.boredom += 1

    def __feed_time(self):          # I worte this
        self.feed += 1              # I wote this

    def __get_feed(self):           # I wrote this
        return self.feed            # I worte this

    feed = property(__get_feed)     # I wrote this

    def __get_mood(self):
        unhappiness = self.hunger + self.boredom
        if unhappiness < 5:
            mood = "happy"
        elif 5 <= unhappiness <= 10:
            mood = "okay"
        elif 11 <= unhappiness <= 15:
            mood = "frustrated"
        else:
            mood = "mad"
        return mood

    mood = property(__get_mood)

    def talk(self):
        print "I'm", self.name, "and I feel", self.mood, "now.\n"
        self.__pass_time()

    def eat(self, food = 4):
        print "Brruppp.  Thank you."
        self.hunger -= food
        self.__feed_time()          # I wrote this
        print self.feed             # I wrote this
        if self.hunger < 0:
            self.hunger = 0
        self.__pass_time()

    def play(self, fun = 4):
        print "Wheee!"
        self.boredom -= fun
        if self.boredom < 0:
            self.boredom = 0
        self.__pass_time()

##

def main():
    crit_name = raw_input("What do you want to name your critter?: ")
    crit = Critter(crit_name)

    choice = None
    while choice != "0":
        print \
        """
        Critter Caretaker

        0 - Quit
        1 - Listen to your critter
        2 - Feed your critter
        3 - Play with your critter
        """

        choice = raw_input("Choice: ")
        print

        # exit
        if choice == "0":
            print "Good-bye."

        # listen to your critter
        elif choice == "1":
            crit.talk()

        # feed your critter
        elif choice == "2":
            crit.eat()

        # play with your critter
        elif choice == "3":
            crit.play()

        # some unknown choice
        else:
            print "\nSorry, but", choice, "isn't a valid choice."

main()
("\n\nPress the enter key to exit.")



From sjmachin at lexicon.net  Thu Feb 24 15:56:49 2005
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 25 Feb 2005 07:56:49 +1100
Subject: Canonical way of dealing with null-separated lines?
References: <lcll9efw8l.fsf@gaffa.mit.edu>
	<mailman.3006.1109264015.22381.python-list@python.org>
Message-ID: <5aes11d4da95un1n78vtb04m43269hqo4m@4ax.com>

On Thu, 24 Feb 2005 11:53:32 -0500, Christopher De Vries
<devries at idolstarastronomer.com> wrote:

>On Wed, Feb 23, 2005 at 10:54:50PM -0500, Douglas Alan wrote:
>> Is there a canonical way of iterating over the lines of a file that
>> are null-separated rather than newline-separated?
>
>I'm not sure if there is a canonical method, but I would recommending using a
>generator to get something like this, where 'f' is a file object:
>
>def readnullsep(f):
>    # Need a place to put potential pieces of a null separated string
>    # across buffer boundaries
>    retain = []
>
>    while True:
>        instr = f.read(2048)
>        if len(instr)==0:
>            # End of file
>            break
>
>        # Split over nulls
>        splitstr = instr.split('\0')
>
>        # Combine with anything left over from previous read
>        retain.append(splitstr[0])
>        splitstr[0] = ''.join(retain)
>
>        # Keep last piece for next loop and yield the rest
>        retain = [splitstr[-1]]
>        for element in splitstr[:-1]:

(1) Inefficient (copies all but the last element of splitstr)

>            yield element
>
>    # yield anything left over
>    yield retain[0]

(2) Dies when the input file is empty.

(3) As noted by the OP, can return a spurious empty line at the end.

Try this:

!def readweird(f, line_end='\0', bufsiz=8192): 
!    retain = '' 
!    while True: 
!        instr = f.read(bufsiz)
!        if not instr:
!            # End of file 
!            break 
!        splitstr = instr.split(line_end)
!        if splitstr[-1]:
!            # last piece not terminated
!            if retain:
!                splitstr[0] = retain + splitstr[0]
!            retain = splitstr.pop()
!        else:
!            if retain:
!                splitstr[0] = retain + splitstr[0]
!                retain = ''
!            del splitstr[-1]
!        for element in splitstr: 
!            yield element 
!    if retain:
!        yield retain

Cheers,
John


From caleb1 at telkomsa.net  Tue Feb  8 23:55:28 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Tue, 08 Feb 2005 23:55:28 -0500
Subject: variable declaration
References: <cu2l5t$cf9$01$1@news.t-online.com>
	<MSGID_2=3A5025=2F3.131_4208c092@fidonet.org>
	<110i8st7n7n084a@corp.supernews.com>
Message-ID: <opslwymqa21js0xs@news.telkomsa.net>

Jeff

I fully agree.  As I stated in a message to alexander, it is quick and  
easy even to write a simple project-specific tool for checking that only  
allowed variable names exist in all the project files.

Compared to having to work with tons of effectively useless variable  
declarations forever (perhaps even only in other peoples code who decided  
to use the "option"), it is not much to ask (I work in pascal a lot - I  
know all about tons and tons of declarations).

thx
Caleb

> You can also get all places where said variable exists by using grep, or  
> your editor's search feature.  I don't see how a var declaration gains  
> you anything over 'grep PowerOfGenerator *.py' ...
>
> Jeff Shannon
> Technician/Programmer
> Credit International
>
>



From unlearned at gmail.com  Tue Feb  1 21:36:35 2005
From: unlearned at gmail.com (Daniel Fackrell)
Date: Tue, 1 Feb 2005 19:36:35 -0700
Subject: [perl-python] string pattern matching
References: <1107290707.549792.199860@c13g2000cwb.googlegroups.com><mailman.1716.1107300060.22381.python-list@python.org><2uWdnWyp5M1Fip3fRVn-sQ@rogers.com>
	<fbydnQJ8DNSthJ3fRVn-pw@speakeasy.net>
Message-ID: <ctpe58$7ar$1@sea.gmane.org>

- Henry Wadsworth Longfellow
"Erik Max Francis" <max at alcyone.com> wrote in message
news:fbydnQJ8DNSthJ3fRVn-pw at speakeasy.net...
> Dan Perl wrote:
>
> > Perhaps someone will write a program to automatically follow up on every
> > [perl-python] posting?  The follow-up could just contain a statement
like
> > the one Daniel mentions.  Obviously the program would be written in
python.
> > ;-)
>
> I'm not really sure that such a disclaimer is explicitly necessary.
> Anyone looking at Xah Lee's posts will also see the threads they
> generate, which involve people pointing out all their errors.  Granted
> this won't happen with every single post, but since he's posting this
> stuff once a day, I don't think the chances of someone finding his posts
> and not seeing the related discussion and refutations is a big risk.
>
> For the rest of us, we can just killfile the threads easily enough.

It seems to me that application of one of these solutions reduces the
effectiveness of the other.  If enough persons killfile the threads, who
warns the newbies?  And so those who don't killfile the threads to ensure
that somebody is still guarding against misleading information to newbies
continue dealing with it manually.

Daniel Fackrell





From irmen.NOSPAM at xs4all.nl  Sat Feb 12 18:29:12 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sun, 13 Feb 2005 00:29:12 +0100
Subject: Text files read multiple files into single file,
 and then recreate the multiple files
In-Reply-To: <1108250252.479092.298670@z14g2000cwz.googlegroups.com>
References: <1108250252.479092.298670@z14g2000cwz.googlegroups.com>
Message-ID: <420e90fb$0$28978$e4fe514c@news.xs4all.nl>

googlinggoogler at hotmail.com wrote:
> Hiya,
> 
> The title says it all really, but im a newbie to python sort of. I can
> read in files and write files no probs.
> 
> But what I want to do is read in a couple of files and output them to
> one single file, but then be able to take this one single file and
> recreate the files I put into it.

A ZIP archive perhaps?
See the zipfile module.


> Im really at a loss as to how I go about recovering the files?
> obviously if i scan for a string that specifys the start and end of
> each file, theres the chance that the file might contain this term to
> which would split the files into unwanted chucks of file, which wouldnt
> be wanted.

ZIP archives are binary compressed files. Is this okay or do
you require the file to be a text file?

--Irmen


From ajsiegel at optonline.com  Sat Feb  5 16:03:09 2005
From: ajsiegel at optonline.com (Arthur)
Date: Sat, 05 Feb 2005 16:03:09 -0500
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<qb1a01lk3mv4vp852q88prqb9al336h9r2@4ax.com>
	<1grj036.r13xcy1d72inbN%aleaxit@yahoo.com>
Message-ID: <2qba01d1men2ai48gp4cojo2e28rd5g9ob@4ax.com>

On Sat, 5 Feb 2005 20:02:44 +0100, aleaxit at yahoo.com (Alex Martelli)
wrote:

>Arthur <ajsiegel at optonline.com> wrote:
>
>> On Sat, 5 Feb 2005 17:00:15 +0100, aleaxit at yahoo.com (Alex Martelli)
>> wrote:
>> >
>> >I consider this one of the worst ideas to have been proposed on this
>> >newsgroup over the years, which _IS_ saying something. \
>> 
>> I would disagree, but only to the extent that nothing that is only a
>> request for an option toggle should qualify for this award.  For
>> anyone not interested in it's effects, it's business as usual.
>
>You must have lead a charmed life, I think, unusually and blissfully
>free from pointy-haired bosses (PHBs).  In the sublunar world that most
>of us inhabit, ``optional'' idiocies of this kind soon become absolutely
>mandatory -- thanks to micromanagement by PHBs.

It seems to me that you would be more accurate (and calmer) if you
generalized from your own experience, rather than in direct
contradiction to it.

That the firms that advocate the use of Python are the one's  least
likely to be dominated by PHB's who DKTAFTE (who don't know their ass
from their elbows).

Unless I am misintepreting  you. 

Do the STUPID firms use Python as well.   

Why?  

Clearly there are stupider choices.

I prefer to use VB when doing certain kinds of stupid things.  It's
the right tool in those cases.  

Really.

Perhaps the answer here has more to do with backing off efforts to
make Python ubiquitous. 

Why shouldn't the community stay a bit elitist? 

Or else maybe that's where you started on this thread, in fact - and
in your own way.

If so, I agree - within reason.  

One doesn't toggle between VB and Python, perhaps is the point.  They
are of different species. 

Art



From bh at intevation.de  Tue Feb  8 14:47:06 2005
From: bh at intevation.de (Bernhard Herzog)
Date: Tue, 08 Feb 2005 20:47:06 +0100
Subject: turing machine in an LC
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
	<87mzuf9gu8.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<s9zvf93ovp8.fsf@salmakis.intevation.de>
	<pan.2005.02.08.12.47.00.135408@jerf.org>
Message-ID: <s9z8y5yq1fp.fsf@salmakis.intevation.de>

Jeremy Bowers <jerf at jerf.org> writes:

> On Tue, 08 Feb 2005 17:36:19 +0100, Bernhard Herzog wrote:
>> Nick Vargish <nav+posts at bandersnatch.org> writes:
>>> "Xah Lee" <xah at xahlee.org> writes:
>>>> is it possible to write python code without any indentation?
>>> Not if Turing-completeness is something you desire.
>> 
>> It's possible to implement a turing machine with a single list
>> comprehension.  No indentation needed.
>
> I had to think about it, it's an interesting, and I'm going to tentatively
> disagree, because of the statement/expression dichotomy. "Tentatively"
> because if somebody can answer these objections than I will happily change
> my mind :-)


Here's an implementation of a turing machine simulator I hacked up a
while ago.  For readability's sake, it's a function definition with a
doc-string, but the heart of it is a single list comprehension which
could be written without indentation:


def listcomp_turing(M, T, initial_state = 0):
    """Run the turing machine M on the tape T.

    The tape T should be a dictionary mapping head positions to the
    value on the tape at that position.  Valid values on the tape are 0
    and 1.  Empty positions have the value 0.  The initial head position
    is 0.

    The turing machine M should be a sequence of state pairs.  The state
    of the machine is used as an index into that sequence and thus
    should be in range(len(M)).  Each state pair is a pair of
    (write_symbol, head_direction, next_state) triples, one for each of
    the possible values on the tape at the current head position.  The
    initial state is given by the optional parameter initial_state.  If
    the next state is None, the machine stops.  The direction may be
    either -1 or 1 meaning left and right respectively.  The function
    does not enforce this limitation but with other values the machine
    is not a turing machine anymore.

    The return value is T.
    """
    [x for L in [[[initial_state, 0]]]
       for state, pos in L
       if state is not None
          and (L.append([M[state][T.get(pos, 0)][2],
                         pos + M[state][T.get(pos, 0)][1]])
               or T.__setitem__(pos, M[state][T.get(pos, 0)][0]))]
    return T



For an example, lets take the one from wikipedia's article on turing
machines:


    The following Turing machine has an alphabet {'0', '1'}, with 0
    being the blank symbol. It expects a series of 1's on the tape, with
    the head initially on the leftmost 1, and doubles the 1's with a 0
    in between, i.e., "111" becomes "1110111". The set of states is {s1,
    s2, s3, s4, s5} and the start state is s1. The action table is as
    follows.

       Old Read   Wr.      New     Old Read   Wr.      New
       St. Sym.   Sym. Mv. St.     St. Sym.   Sym. Mv. St.
       - - - - - - - - - - - -     - - - - - - - - - - - -
        s1  1  ->  0    R   s2      s4  1  ->  1    L   s4
        s2  1  ->  1    R   s2      s4  0  ->  0    L   s5
        s2  0  ->  0    R   s3      s5  1  ->  1    L   s5
        s3  0  ->  1    L   s4      s5  0  ->  1    R   s1
        s3  1  ->  1    R   s3


The listcomp_turing call with a tape containing "11" would be

listcomp_turing([((0, +1, None), (0, +1, 1)),
                 ((0, +1, 2), (1, +1, 1)),
                 ((1, -1, 3), (1, +1, 2)),
                 ((0, -1, 4), (1, -1, 3)),
                 ((1, +1, 0), (1, -1, 4))],
                {0:1, 1:1})

which produces a result tape of

   {0: 1, 1: 1, 2: 0, 3: 1, 4: 1}


  Bernhard

-- 
Intevation GmbH                                 http://intevation.de/
Skencil                                           http://skencil.org/
Thuban                                  http://thuban.intevation.org/


From FBatista at uniFON.com.ar  Wed Feb 16 12:55:03 2005
From: FBatista at uniFON.com.ar (Batista, Facundo)
Date: Wed, 16 Feb 2005 14:55:03 -0300
Subject: renaming 'references' to functions can give recursive problem s
Message-ID: <A128D751272CD411BC9200508BC2194D053C7FB6@escpl.tcp.com.ar>

[Fredrik Lundh]

#- you're confused.  resetting your brain and reading the documentation
#- again might help:
#- 
#-     http://docs.python.org/ref/objects.html
#-     http://docs.python.org/ref/naming.html

This article will also help him a lot:

  http://starship.python.net/crew/mwh/hacks/objectthink.html


.    Facundo

Bit?cora De Vuelo: http://www.taniquetil.com.ar/plog
PyAr - Python Argentina: http://pyar.decode.com.ar/


  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
ADVERTENCIA.

La informaci?n contenida en este mensaje y cualquier archivo anexo al mismo,
son para uso exclusivo del destinatario y pueden contener informaci?n
confidencial o propietaria, cuya divulgaci?n es sancionada por la ley.
Si Ud. No es uno de los destinatarios consignados o la persona responsable
de hacer llegar este mensaje a los destinatarios consignados, no est?
autorizado a divulgar, copiar, distribuir o retener informaci?n (o parte de
ella) contenida en este mensaje. Por favor notif?quenos respondiendo al
remitente, borre el mensaje original y borre las copias (impresas o grabadas
en cualquier medio magn?tico) que pueda haber realizado del mismo.
Todas las opiniones contenidas en este mail son propias del autor del
mensaje y no necesariamente coinciden con las de Telef?nica Comunicaciones
Personales S.A. o alguna empresa asociada.
Los mensajes electr?nicos pueden ser alterados, motivo por el cual
Telef?nica Comunicaciones Personales S.A. no aceptar? ninguna obligaci?n
cualquiera sea el resultante de este mensaje.
Muchas Gracias.
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From jerf at jerf.org  Thu Feb  3 14:20:26 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 03 Feb 2005 14:20:26 -0500
Subject: Apache & Python 500 Error
References: <36bkqfF4sjt0oU1@individual.net>
	<pan.2005.02.02.16.56.13.530859@jerf.org>
	<36el9jF4oj223U1@individual.net>
Message-ID: <pan.2005.02.03.19.20.25.679413@jerf.org>

On Thu, 03 Feb 2005 13:55:13 +0100, Christian wrote:
>     from mod_python import apache
>     ^
> SyntaxError: invalid syntax
> 
> ----
> My test script:
> #!/usr/bin/python
> 
> print 'Content-Type: text/plain\r'
> print '\r'
> import os
> print os.getcwd()

For the quote of the error message, I've taken the liberty of stripping
off the apache-added stuff off the front so you can read it better.

You should now be able to easily see that the error message and your shown
program don't mesh. That error appears to be from an earlier run.

Even so, I can tell you one thing: The error resulted from indenting your
"from mod_python import apache" call that you no longer have. Python uses
whitespace for structure, and just as you must indent the body of loops,
you must *not* extraneously indent other things (line continuations
don't count).

You'll need to post the correct error message after configuring Apache for
CGI as Peter showed, unless of course you figure out the problem.


From fredrik at pythonware.com  Thu Feb 17 03:02:53 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 17 Feb 2005 09:02:53 +0100
Subject: Derived class and deepcopy
References: <qXVQd.119843$K7.61072@fe2.news.blueyonder.co.uk>
Message-ID: <cv1itj$fsp$1@sea.gmane.org>

Philip Smith wrote:

> In the given example I want to apply deepcopy() to the Matrix instance (on initialisation) to 
> ensure that the list part is not affected by subsequent changes to the initialising list or Matrix 
> but this gives me a string of errors (some of which imply I'm trying to copy the class rather than 
> the instance).
>
> Anyone got any thoughts on this????

where's the example?  what errors do you get?

</F> 





From aleaxit at yahoo.com  Sun Feb  6 02:27:32 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 6 Feb 2005 08:27:32 +0100
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<mailman.1975.1107621941.22381.python-list@python.org>
	<1grixdp.1ttyiwh1m4ydsiN%aleaxit@yahoo.com>
	<mailman.2005.1107657673.22381.python-list@python.org>
Message-ID: <1grjzax.1ibjw8e1iktxyvN%aleaxit@yahoo.com>

Nick Coghlan <ncoghlan at iinet.net.au> wrote:
   ...
> >     _temp = x.y
> >     x.y = type(temp).__irebind__(temp, z)
   ...
> I was thinking of something simpler:
> 
>    x.y
>    x.y = z
> 
> That is, before the assignment attempt, x.y has to resolve to *something*, but
> the interpreter isn't particularly fussy about what that something is.

OK, I guess this makes sense.  I just feel a tad apprehensive at
thinking that the semantics differ so drastically from that of every
other augmented assignment, I guess.  But probably it's preferable to
NOT let a type override what this one augmented assignment means; that
looks like an "attractive nuisance" tempting people to be too clever.

Still, if you write a PEP, I would mention the possible alternative and
why it's being rejected in favor of this simpler one.


Alex


From roy at panix.com  Sun Feb  6 17:40:56 2005
From: roy at panix.com (Roy Smith)
Date: Sun, 06 Feb 2005 17:40:56 -0500
Subject: Python versus Perl ?
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
	<mailman.2039.1107728943.22381.python-list@python.org>
Message-ID: <roy-BAB68F.17405606022005@reader2.panix.com>

"EP" <EP at zomething.com> wrote:
> There are very very few cases where anyone is going to require 
> you to use Python

Conversely, it pays to understand when you are likely to be permitted to 
use it (or any new technology), and when you are likely to be forbidden.

Companies are generally the most conservative about "customer-facing" 
projects.  Something that's going to be shipped to a customer, or used 
directly by a customer, is not a good candidate to try and the the PHB to 
approve using something new.

The next step down the line is something which is going to be used by many 
people within your own organization.  If you write a tool in language X and 
want it to get adopted as a tool that everybody uses, don't be too 
surprised if the answer is, "Yeah, but who's going to maintain it, nobody 
but you knows X".

The easiest way to sneak a new technology in the door is on a project where 
nobody else has to use the technology directly, in other words, a tool you 
write to help you get your own work done.  When the boss notices that 
you're getting your stuff done in half the time most of the other group 
spends doing it, and you tell him it's because you're using X and everybody 
else is using Y, it's like waving dollar signs in front of his face.


From mart.franklin at gmail.com  Wed Feb 23 01:36:46 2005
From: mart.franklin at gmail.com (Martin Franklin)
Date: Wed, 23 Feb 2005 06:36:46 +0000
Subject: basic tkinter/Windows question
In-Reply-To: <7xwtt0ysuo.fsf@ruckus.brouhaha.com>
References: <421BCED0.2070206@irl.cri.nz> <7xwtt0ysuo.fsf@ruckus.brouhaha.com>
Message-ID: <cvh82v$vaq$1@sea.gmane.org>

Paul Rubin wrote:
> I find myself having to write some code on Windows :-(.  To alleviate
> the pain, at least I get to use Python for some of it.
> 
> I'm trying to write a simple application, say "eggs.py".  It pops a
> tkinter gui and lets the user do some stuff.  The system has Python
> installed so I don't care about wrapping it in a .exe file or anything
> like that.  But I'd like to make a desktop icon for eggs.py and let the
> user double-click it and run the app without also getting a DOS box on
> the screen.
> 
> Is there a simple way to do that?  I didn't see anything in the Python
> docs about it.  I suspect that this is really a dumb Windows question,
> but I avoid Windows whenever I can, so most anything I can ask about it
> is probably dumb.
> 
> Thanks much.

renaming the eggs.py to eggs.pyw will tell windows to use pythonw.exe
to start this python file (and will not open a console)  You can then
create a shortcut in the normal way

Martin



From unknownsoldier93 at yahoo.com  Thu Feb 24 23:22:32 2005
From: unknownsoldier93 at yahoo.com (gf gf)
Date: Thu, 24 Feb 2005 20:22:32 -0800 (PST)
Subject: Trace exceptions
Message-ID: <20050225042232.68519.qmail@web20708.mail.yahoo.com>

Is there anyway to do something like this:

try:
     ...
except Exception:
     print the Exception message (and maybe other
info)




		
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From bearophileHUGS at lycos.com  Sun Feb 13 17:52:32 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 13 Feb 2005 14:52:32 -0800
Subject: builtin functions for and and or?
In-Reply-To: <37a2i0F58gsbsU1@individual.net>
References: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>
	<37a2i0F58gsbsU1@individual.net>
Message-ID: <1108335152.338013.45530@z14g2000cwz.googlegroups.com>

In Python there are so many ways to do things...
This looks like another one, I haven't tested it:

not False in imap(pred, iterable)

As usual tests are required to measure the faster one.
I agree with Roose, there are are some "primitive" operations (like
this, and flatten, partition, mass removal of keys from a dictionary,
and few others) that can be added to the language (but I'm still not
capabable of doing it myself, and Python is free, so it's not right to
ask people to work for free for us).

Bear hugs,
Bearophile



From pipedreamergrey at gmail.com  Tue Feb 22 15:36:40 2005
From: pipedreamergrey at gmail.com (PipedreamerGrey)
Date: 22 Feb 2005 12:36:40 -0800
Subject: PythonCard and Py2Exe
Message-ID: <1109104600.289868.118190@f14g2000cwb.googlegroups.com>

I'm trying to create a standalone version (.exe) of PythonCard's Custdb
sample using Py2Exe version 0.5.0.  Everytime I attempt to compile the
program, I get an error during compilation.  This is the exact code I'm
using in the setup file:

from distutils.core import setup
import py2exe

setup( name = "custdb",
       console = ["custdb.py"],
       data_files = [ (".", ["custdb.ini", "custdb.de.rsrc.py",
"custdb.rsrc.py", "customerdata.csv"]) ]
       )


This is the error message I get when I run custdb.exe:


Traceback (most recent call last):
  File "custdb.py", line 202, in ?
    app = model.Application(CustDbStack)
  File "PythonCard\model.pyc", line 337, in __init__
  File "PythonCard\resource.pyc", line 48, in getResource
  File "PythonCard\resource.pyc", line 86, in __init__
  File "PythonCard\resource.pyc", line 91, in __init__
  File "PythonCard\resource.pyc", line 91, in __init__
  File "PythonCard\resource.pyc", line 96, in __init__
  File "PythonCard\resource.pyc", line 139, in enforceSpec
  File "PythonCard\resource.pyc", line 30, in loadComponentModule
ImportError: cannot import module 'radiogroup


When I add "radiogroup" to the imports at the top of custdb.py, I get
this error message:


Traceback (most recent call last):
  File "custdb.py", line 18, in ?
ImportError: cannot import name radiogroup


This is line 18 in Custdb.py:

from PythonCard import dialog, model, radiogroup



From johnpote at blueyonder.co.uk  Thu Feb 10 19:04:21 2005
From: johnpote at blueyonder.co.uk (John Pote)
Date: Fri, 11 Feb 2005 00:04:21 GMT
Subject: tkinter menu bar problem
References: <gAmOd.31235$68.23603@fe1.news.blueyonder.co.uk>
	<opslxnemnrrqur0o@eb.pragmadev>
Message-ID: <9ESOd.40955$68.917@fe1.news.blueyonder.co.uk>

Thanks for the reply. I now have radio buttons (with a nice tick!) on my 
menu that can be greyed out when disabled. I can also change the background 
colour of the individual buttons as you suggest.

What I cannot do is change the background colour of the menu bar itself. The 
following code is accepted but the menu bar background stays resolutely 
light grey rather than light blue.

 rootWin = Tk()
 menuBar = MenuBar(rootWin, background='light blue')
 menuBar.insert_cascade(MenuBar.CONFIG, label='Config', menu=configMenu, 
background='light blue')

The background options are being ignored and the window retains its standard 
windows colour scheme which I assume is overriding the background colour 
option. I guess my normal windows colour scheme (classic windows!) is not so 
bad and life is too short to tinker with this any more.

Thanks again
John Pote



"Eric Brunel" <eric_brunel at despammed.com> wrote in message 
news:opslxnemnrrqur0o at eb.pragmadev...
> On Wed, 09 Feb 2005 11:35:40 GMT, John Pote <johnpote at blueyonder.co.uk> 
> wrote:
>
>> I have a menu bar in a top level window as follows
> [snip code]
>>
>> Q1 Cannot find a way of changing the menu bars background colour. When
>> colour options are accepted they seem to be ignored. Is this a native 
>> look
>> and feel characteristic of write once run anywhere, not yet implemented 
>> or
>> possibly a bug.
>
> Even if the tk man pages [1] don't mention it, it would not be surprising 
> if the background option for menu items did not work on Windows, since 
> many things seem to be "hardcoded" on this platform. I tested the 
> following code on Linux; it works without problem and has the expected 
> behaviour:
>
>>>> from Tkinter import *
>>>> root = Tk()
>>>> mb = Menu(root)
>>>> root.configure(menu=mb)
>>>> m = Menu(mb)
>>>> mb.add_cascade(label='Menu', menu=m)
>>>> m.add_command(label='Quit', command=root.quit, background='red')
>
> If it is what you did and if it doesn't work on Windows, it is likely that 
> the background option for menu items is not supported for this platform...
>
>> Q2 Some of the menu options in the config menu will not always be 
>> available
>> depending on program state. How can individual items in such a menu be
>> turned to faint gey to indicate their unavailability. Also a tick mark
>> against an item would be useful to show the currently selected option. Is
>> this possible?
>
> To "grey out" a menu item:
>
> parentMenu.entryconfigure(itemIndex, state=DISABLED)
>
> To have menu items with a check-mark, use the add_checkbutton or 
> add_radiobutton methods on the parent menu. Their use is similar to the 
> Checkbutton and Radiobutton classes. See [1] for all available options.
>
> [1] http://www.tcl.tk/man/tcl8.4/TkCmd/menu.htm
>  - Eric Brunel - 




From secun at yahoo.com  Fri Feb 25 10:20:04 2005
From: secun at yahoo.com (Chris)
Date: Fri, 25 Feb 2005 15:20:04 GMT
Subject: Nevow examples
References: <mailman.3026.1109289153.22381.python-list@python.org>
Message-ID: <MPG.1c890c81a8bebe77989697@news2.atlantic.net>

Does anyone know of a site(s) that shows examples of what you can do 
with Nevow? I'm not necessarily referring to code, but what it can do 
over the web. (Something I can show my boss if needed.)




In article <mailman.3026.1109289153.22381.python-list at python.org>, 
oliphant at ee.byu.edu says...
> 
> There was a request for nevow examples.  Nevow is a fantastic 
> web-development framework for Python.
> 
> I used nevow to create http://www.scipy.org/livedocs/
> 
> This site uses nevow and self introspection to produce (live) 
> documentation for scipy based on the internal docstrings.   It would be 
> nice to add the capability for users to update the documentation through 
> the web-site.  But, that functionality is not complete.
> 
> The code itself is available in the util directory of scipy which can be 
> checked out of CVS (or browsed).  Go to http://www.scipy.org  for mor 
> details.
> 
> -Travis Oliphant
> 
> 


From bearophileHUGS at lycos.com  Fri Feb 11 05:53:30 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 11 Feb 2005 02:53:30 -0800
Subject: lambda and for that matter goto not forgetting sugar
In-Reply-To: <mailman.2317.1108047040.22381.python-list@python.org>
References: <tFJOd.38794$68.10179@fe1.news.blueyonder.co.uk>
	<mailman.2317.1108047040.22381.python-list@python.org>
Message-ID: <1108119209.965796.246160@z14g2000cwz.googlegroups.com>

Nick Coghlan wrote:
> Anyway, check out AlternateLambdaSyntax on the python.org Wiki

It's an interesting page:
http://www.python.org/moin/AlternateLambdaSyntax
Some days ago I suggested something different: maybe def can become a
function, then it can work as lambda (and still as the old def) too.
Something like:

original :
lambda a, b, c:f(a) + o(b) - o(c)
lambda x: x * x
lambda : x
lambda *a, **k: x.bar(*a, **k)

==>

def(a, b, c): return f(a) + o(b) - o(c)
fun1 = def(x): return x * x
def(): return x
def(*a, **k): return x.bar(*a, **k)

Such def can be used as the lambda inside expressions too.

fun1 = def(a, b, c): return f(a) + o(b) - o(c)
This is the same as the old:
def fun1(a, b, c):
  return f(a) + o(b) - o(c)

(That use of "return" in the middle is a little verbose to use it for
functions inside expressions.)

That Ruby syntax at the end of page is cute.
{a,b,c | return f(a) + o(b) - o(c)}
{a,b,c | f(a) + o(b) - o(c)}
def(a, b, c | f(a) + o(b) - o(c) )
fun(a, b, c | f(a) + o(b) - o(c) )
(etc. there are lots of other possibilities).

If def becomes a function like that, then beside this syntax:
fun1 = def(a, b, c): return f(a) + o(b) - o(c)
This other one can be interesting for expressions only:
def(a, b, c | f(a) + o(b) - o(c) )
(Both can be acceptable at the same time).

Bye,
Bearophile



From grante at visi.com  Tue Feb  8 16:39:22 2005
From: grante at visi.com (Grant Edwards)
Date: 08 Feb 2005 21:39:22 GMT
Subject: Basic file operation questions
References: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
	<opsllt9r191js0xs@news.telkomsa.net>
	<mailman.1808.1107431422.22381.python-list@python.org>
	<ctt53b$l5u$00$1@news.t-online.com>
	<opslnm1cge1js0xs@news.telkomsa.net>
	<ctu62q$gud$04$1@news.t-online.com>
	<1107846197.701686.303390@l41g2000cwc.googlegroups.com>
	<7q4Od.753$Sd.170775@newshog.newsread.com>
Message-ID: <4209318a$0$21621$a1866201@visi.com>

On 2005-02-08, Marc Huffnagle <mhuffnagle at knowtechnology.net> wrote:

>>>for line in file(...):
>>>   # do stuff

> When you read a file with that method, is there an implied close() call 
> on the file?  I assume there is, but how is that handled?

The file will be closed when the the file object is deleted by
the garbage collection algorithm.  That will happen sometime
after the for loop exits and before the program exits.  In
normal C-Python I believe it happens immediately after the for
loop exits.  However, that behavior is not guaranteed by the
language spec.

-- 
Grant Edwards                   grante             Yow!  Now that I have my
                                  at               "APPLE", I comprehend COST
                               visi.com            ACCOUNTING!!


From carribeiro at gmail.com  Fri Feb  4 18:09:46 2005
From: carribeiro at gmail.com (Carlos Ribeiro)
Date: Fri, 4 Feb 2005 21:09:46 -0200
Subject: Persistence design [was: RE: OT: why are LAMP sites slow?]
In-Reply-To: <20050204224644.GG1607@performancedrivers.com>
References: <3A81C87DC164034AA4E2DDFE11D258E3398367@exchange.hqamor.amorhq.net>
	<20050204224644.GG1607@performancedrivers.com>
Message-ID: <864d370905020415095e876649@mail.gmail.com>

On Fri, 4 Feb 2005 17:46:44 -0500, Jack Diederich <jackdied at jackdied.com> wrote:
> On Fri, Feb 04, 2005 at 10:31:19AM -0800, Robert Brewer wrote:
> > Jack Diederich wrote:
> > > If there is interest I'll follow up with some details on my own LAMP
> > > software which does live reports on gigs of data and - you
> > > guessed it -
> > > I regret it is database backed.  That story also involves why
> > > I started
> > > using Python (the prototype was in PHP).
> >
> > I'd be interested, if only selfishly to hear more potential use cases
> > for *my* projects. ;)
> 
> It would be long so I'll spin it into a blog piece.  They seem to be
> all the rage these days *0.5 wink*

A blog piece of yours truly :-) (call it a blatant plug if you want)

http://pythonnotes.blogspot.com/2004/11/alternative-database-systems.html

"""
There was a time when a database meant a flat file, fixed record
repository. Indexes were added later, bringing better performance for
several tasks. During the sixties, hierarchical database systems were
developed, allowing to model complex real-life structures better. Even
today, old-style mainframe systems (such as IBM's IMS) are still in
production, managing huge databases. SQL was only invented in the
seventies, based on a mathematical formalization of high-level data
manipulation algorithms. Batch processing systems read and process
data in a sequential fashion, and normally do not need such
abstractions. But the new generation interactive systems really needed
them. And when PC-based client-server computing exploded in the 90's,
SQL kingdom was started.
"""
...
"""
In the middle of this, there is a unforeseen trend in the use of the
file system as a storage medium. Yes, the file system. Guess what?
Forget the FAT, please. Current file systems are much more stable and
efficient than older ones. Modern filesystems are hierarchical, and
can store arbitrary objects. Support for journaling, and better
metadata management means that the filesystem is now a better choice
for many situations. Several web publishing engines (blogs, wikis, and
even full-fledged content management systems) support filesystem-based
storage for text notes and documents, which were previously stored (in
a hackish and haphazardous way) into DB blobs. The full filename is
now a primary key, and flexible relationships between entities can be
expressed as hiperlinks.
"""

I'm (slowly) designing a personal CMS that is intended to use
Subversion as its backend, for both blog & wiki style entries. It's
filesystem based, fast (the website can use the working copy for
nearly everything) and allows for versioning - something that its
difficult to implement properly with low-end RDBMSs. It looks
promising :-)

-- 
Carlos Ribeiro
Consultoria em Projetos
blog: http://rascunhosrotos.blogspot.com
blog: http://pythonnotes.blogspot.com
mail: carribeiro at gmail.com
mail: carribeiro at yahoo.com


From alanmk at hotmail.com  Tue Feb 15 05:22:41 2005
From: alanmk at hotmail.com (Alan Kennedy)
Date: Tue, 15 Feb 2005 10:22:41 +0000
Subject: How to implement a file lock ??
In-Reply-To: <mailman.2610.1108459234.22381.python-list@python.org>
References: <mailman.2610.1108459234.22381.python-list@python.org>
Message-ID: <A%jQd.47725$Z14.33641@news.indigo.ie>

[ionel]
> is there a cross-platform library or module for file locking?
> or at least a win32 implementation.
> 
> i'm trying to get a lock on some file in a cgi script. ( i got my data
> erased a few times :P )

portalocker - Cross-platform (posix/nt) API for flock-style file locking.

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/65203

HTH,

-- 
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan


From ilias at lazaridis.com  Sun Feb  6 08:10:51 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sun, 06 Feb 2005 15:10:51 +0200
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
In-Reply-To: <IIFNPRCROgBCFw7W@objmedia.demon.co.uk>
References: <ctsjmg$75p$1@usenet.otenet.gr>
	<pan.2005.02.03.19.10.39.349763@jerf.org>
	<cu2m3q$km1$1@usenet.otenet.gr>
	<mailman.1999.1107644058.22381.python-list@python.org>
	<cu4ahl$a0s$1@usenet.otenet.gr>
	<mailman.2015.1107678627.22381.python-list@python.org>
	<cu4p2e$edq$1@usenet.otenet.gr>
	<IIFNPRCROgBCFw7W@objmedia.demon.co.uk>
Message-ID: <cu550p$6sj$1@usenet.otenet.gr>

Stephen Kellett wrote:
> In message <cu4p2e$edq$1 at usenet.otenet.gr>, Ilias Lazaridis 
> <ilias at lazaridis.com> writes
> 
>> Can one please point me to a downloadable version of the 2 reference 
>> manuals (did not found them)?
> 
> Well, there is an obvious website address to visit and you can see the 
> word "documentation" on that website without scrolling.

which leads to:

http://python.org/doc/

which leads to:

http://docs.python.org/download.html

The conviently downloadable documentation-pack contains 4 "reference" 
type manuals.

I assume the mentioned "2 reference manuals" were contained therein.

> Use Google or a different search engine to find the obvious website.

Thank you.

I prefere interaction with the community.

.

-- 
http://lazaridis.com


From nytimes at swiftdsl.com.au  Thu Feb 17 22:14:55 2005
From: nytimes at swiftdsl.com.au (news.sydney.pipenetworks.com)
Date: Fri, 18 Feb 2005 14:14:55 +1100
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <pan.2005.02.17.15.13.36.917107@jerf.org>
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<37hqlrF59l2b2U1@individual.net>
	<873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<421450CC.9080504@swiftdsl.com.au>
	<87psyz8h9o.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<4214A800.4010509@swiftdsl.com.au>
	<pan.2005.02.17.15.13.36.917107@jerf.org>
Message-ID: <42155DAF.4010806@swiftdsl.com.au>

Jeremy Bowers wrote:
> On Fri, 18 Feb 2005 01:19:44 +1100, news.sydney.pipenetworks.com wrote:
> 
>>Thanks for the pointer. Let's see how many zen points are for the OP's 
>>idea vs against
> 
> 
> Along with the fact that I agree with Nick that you've seriously
> miscounted (most of your "fors" are simply irrelevant and I think you
> added them to bolster your point, at least I *hope* you don't think they
> are all relevant... for instance if you really think "Flat is better than
> nested" applies here, you don't understand what that one is saying...),

You're right there. It's my own interpretation :-)

> I'd point out that the Zen that can be comprehended by checking off items
> in a list is not the true Zen.

Well I didn't create or bring up the list of items originally. I was 
"zenning" it out until someone pointed me to the "Python" commandments.

I always wished computer science was more engineering then philosophy. 
That way there'd always be an obvious answer.

Regards,

Huy




From mhartl at post.harvard.edu  Sat Feb 26 01:58:16 2005
From: mhartl at post.harvard.edu (Michael Hartl)
Date: 25 Feb 2005 22:58:16 -0800
Subject: Which module is "set " in?
References: <xN-dnQs_WL5Tnb3fRVn-3g@comcast.com>
	<mailman.3081.1109394085.22381.python-list@python.org>
Message-ID: <1109401096.625038.51050@l41g2000cwc.googlegroups.com>

It's good that you're using Python 2.3, which does have sets available,
as a previous poster mentioned.  Users of Python 2.2 or earlier can get
most of the Set functionality using the following class (from Peter
Norvig's utils.py file):

# class Set:
#     """This implements the Set class from PEP 218, except it does not
#     overload the infix operators.
#     Ex: s = Set([1,2,3]); 1 in s ==> True; 4 in s ==> False
#     s.add(4); 4 in s ==> True; len(s) ==> 4
#     s.discard(999); s.remove(4); 4 in s ==> False
#     s2 = Set([3,4,5]); s.union(s2) ==> Set([1,2,3,4,5])
#     s.intersection(s2) ==> Set([3])
#     Set([1,2,3]) ==> Set([3,2,1]); repr(s) ==> '{1, 2, 3}'
#     for e in s: pass"""
#
#     def __init__(self, elements=[]):
#         self.dict = {}
#         for e in elements:
#             self.dict[e] = 1
#
#     def __contains__(self, element):
#         return element in self.dict
#
#     def __getitem__(self, i):
#         return self.dict.items()[i]
#
#     def add(self, element):
#         self.dict[element] = 1
#
#     def remove(self, element):
#         del self.dict[element]
#
#     def discard(self, element):
#         if element in self.dict:
#             del self.dict[element]
#
#     def pop(self):
#         key, val = self.dict.popitem()
#         return key
#
#     def clear(self):
#         self.dict.clear()
#
#     def union(self, other):
#         return Set(self).union_update(other)
#
#     def intersection(self, other):
#         return Set(self).intersection_update(other)
#
#     def union_update(self, other):
#         for e in other:
#             self.add(e)
#         return self
#
#     def intersection_update(self, other):
#         for e in self.dict.keys():
#             if e not in other:
#                 self.remove(e)
#         return self
#
#     def issubset(self, other):
#         for e in self.dict.keys():
#             if e not in other:
#                 return False
#         return True
#
#     def __iter__(self):
#         for e in self.dict:
#             yield e
#
#     def __len__(self):
#         return len(self.dict)
#
#     def __cmp__(self, other):
#         if self is other: return False
#         if not isinstance(other, Set): return id(self) - id(other)
#         return cmp(self.dict, other.dict)
#
#     def __repr__(self):
#         return "{%s}" % ", ".join([str(e) for e in self.dict.keys()])

Michael

--
Michael D. Hartl, Ph.D.
CTO, Quark Sports LLC
http://quarksports.com/



From onurb at xiludom.gro  Wed Feb  9 04:47:34 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Wed, 09 Feb 2005 10:47:34 +0100
Subject: Lambda
In-Reply-To: <9VdOd.110$0b3.4668@news.uswest.net>
References: <9VdOd.110$0b3.4668@news.uswest.net>
Message-ID: <4209dc38$0$29400$626a14ce@news.free.fr>

e wrote:
> Question: WHAT IS LAMBDA? 

No need to scream, we here you quite well.

> I can't figure out what it does from any 
> documentation i've found anywhere. 

Then I doubt you really did search.
http://www.google.com/search?q=Python+%2B+lambda

> i doubt i need it

Why ?

> but i still want to 
> know what the heck it is/does/fixes/whatever! 

lambda is a keyword that is used to create anonymous functions. This is 
pretty handy for simple callbacks.

-- 
bruno desthuilliers
ruby -e "print 'onurb at xiludom.gro'.split('@').collect{|p| 
p.split('.').collect{|w| w.reverse}.join('.')}.join('@')"
--


From mdane at h2001.net  Thu Feb  3 09:19:14 2005
From: mdane at h2001.net (Mabon Dane)
Date: 3 Feb 2005 06:19:14 -0800
Subject: Is there a market for python developers?
Message-ID: <1107440354.317628.221090@g14g2000cwa.googlegroups.com>

I am new to python and took my first attempts at working with this
language today.  Is there a market for people who work with Python?

Mabon Dane



From eric_brunel at despammed.com  Thu Feb 17 04:27:30 2005
From: eric_brunel at despammed.com (Eric Brunel)
Date: Thu, 17 Feb 2005 10:27:30 +0100
Subject: Pmw.Balloon under Windows
References: <1108579886.983146.56130@z14g2000cwz.googlegroups.com>
Message-ID: <opsmb4j4virqur0o@eb.pragmadev>

On 16 Feb 2005 10:51:27 -0800, Aki Niimura <akineko at pacbell.net> wrote:
[snip]
> The software is working fine under Solaris 9.
> However, when I tried it under Windows, it worked also fine but it spit
> out
> the following error message when exiting.
>
> (from cygwin terminal)
>
> % c:/Python23/python my_app.py
>
> This application has requested the Runtime to terminate it in an
> unusual way.
> Please contact the application's support team for more information.
>
> (the same error message is observed when I run the program directly in
> Windows XP environment.)
> //
[snip]
> After painful investigation, I found Pmw.Balloon was causing this
> problem
> (because the problem went away if I commented out all balloon
> statements).
>
> Then I compared my usages and Pmw Balloon example because the example
> didn't
> cause this. (http://pmw.sourceforge.net/doc/Balloon.html)

I used the Pmw.Balloon quite a lot and never see any problem.

One question: what Python do you use? Is it a regular Windows Python distribution or the Python delivered with Cygwin? I know by experience that the Python in Cygwin has quite a lot of problems (mine crashes *very* often). If you don't already use a "regular" Windows distro, I think using one may solve your problem.

> My questions are:
> (1) Why my program is complaining and is there any workaround?
>
> (2) What is the difference between using widget quit() method
> and using Windows 'X' button.
> - I know clicking Windows 'X' button generates an event but I thought
> - ultimately it reached to the same routine to terminate the program.

I think the default binding for the 'X' button is to call destroy, not quit. Calling destroy on the main window is almost equivalent to calling quit, so maybe it can be a solution?

> (3) Is it possible to fake clicking 'X' button?
> I see a widget has event_generate() method.

Not that I know of. The event_generate method won't help here, because the 'X' button is handled by the window manager, and not by the application. It's a bit more complicated on Windows (as usual...) since there is no "real" window manager, but from the tk/Tkinter point of view, the result is the same: you can't "fake" a window manager event using event_generate.


BTW, what are the versions of Python, tk and Pmw you're using?

HTH a little...
  - Eric Brunel -


From theller at python.net  Thu Feb 17 13:24:00 2005
From: theller at python.net (Thomas Heller)
Date: Thu, 17 Feb 2005 19:24:00 +0100
Subject: [newbie]How to install python under DOS and is there any
 Wxpython can be installed under dos?
References: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
	<1108557065.547230.254540@z14g2000cwz.googlegroups.com>
	<b9-dnTQOwoYK647fRVn-2Q@rogers.com>
	<11172sa1sg2svc8@corp.supernews.com>
	<l4OdneC_7ZH2oInfRVn-3A@rogers.com>
	<zkZQd.9062$Sl3.275762@news4.e.nsc.no>
	<WC0Rd.5165$VI5.2979@newsread3.news.atl.earthlink.net>
	<4K6dneoBWMc4KInfRVn-rA@rogers.com> <37jsdgF5e56jeU1@individual.net>
Message-ID: <4qgbt58f.fsf@python.net>

"Diez B. Roggisch" <deetsNOSPAM at web.de> writes:

> Maybe somehow the pygame sdl wrapper can be used for gui-stuff. SDL has had
> a DOS mode. But it is discontinued.

What exactly is discontinued?  pygame? SDL?

Thomas


From aurora00 at gmail.com  Wed Feb  2 14:54:18 2005
From: aurora00 at gmail.com (aurora)
Date: Wed, 02 Feb 2005 11:54:18 -0800
Subject: hotspot profiler experience and accuracy?
References: <opsljvqucx6yt6e7@news.cisco.com>
	<42011f05$0$28983$e4fe514c@news.xs4all.nl>
Message-ID: <opslk5ksat6yt6e7@news.cisco.com>

Thanks for pointing me to your analysis. Now I know it wasn't me doing  
something wrong.

hotspot did lead me to knock down a major performance bottleneck one time.  
I found that zipfile.ZipFile() basically read the entire zip file in  
instantiation time, even though you may only need one file from it  
subsequencely.

In anycase the number of function call seems to make sense and it should  
give some insight to the runtime behaviour. The CPU time is just so  
misleading.



> aurora wrote:
>
>> But the numbers look skeptical. Hotspot claim 71.166 CPU seconds but  
>> the  actual elapsed time is only 54s. When measuring elapsed time  
>> instead of  CPU time the performance gain is only 13% with the profiler  
>> running and  down to 10% when not using the profiler.
>>  Is there something I misunderstood in reading the numbers?
>
> Well, I'm confused too. Look at my post from a few months ago:
>    http://tinyurl.com/6awzj
> (note that my code contained a few errors and that you need
> to use the fixed code that I posted a few replies later).
>
> Perhaps somebody can explain a bit more about this this time? :-)
>
> At the moment, frankly, hotspot seems rather useless.
>
> --Irmen



From cappy2112 at gmail.com  Thu Feb 10 17:56:11 2005
From: cappy2112 at gmail.com (Cappy2112)
Date: 10 Feb 2005 14:56:11 -0800
Subject: convert list of tuples into several lists
References: <cud40u$vqb$01$1@news.t-online.com>
	<36uihlF58p63iU1@individual.net>
	<1107998078.610891.111510@z14g2000cwz.googlegroups.com>
	<QrOdnf4DLK2hjpbfRVn-hw@comcast.com>
Message-ID: <1108076171.929529.280860@z14g2000cwz.googlegroups.com>

Thanks
I dont remember reading anything about this.
What is this feature called?

Steven Bethard wrote:
> Cappy2112 wrote:
> > What does the leading * do?
>
> Tells Python to use the following iterable as the (remainder of the)
> argument list:
> 
>



From fuzzyman at gmail.com  Tue Feb  1 05:40:18 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 1 Feb 2005 02:40:18 -0800
Subject: Forcing interactive interpreter without (-i)
In-Reply-To: <r7k0hctp.fsf@python.net>
References: <mailman.1683.1107244488.22381.python-list@python.org>
	<r7k0hctp.fsf@python.net>
Message-ID: <1107254418.446746.59270@f14g2000cwb.googlegroups.com>

In Movable Python I use IPython and code.InteractiveConsole to provide
interactive sessions.

See the file 'movpy.py' in the source distribution to see the code.
Note that to get IPython working with py2exe you must effectively do an
explicit `import site`.

>def interactive(localvars=None):
>    """A very simple function to embed an interactive interpreter into
movpy."""
# could have the banner passed in as an optional argument, plus
maybe the IPython config file location
>    IPShellEmbed = None
>    try:
>        from IPython.Shell import IPShellEmbed
>    except ImportError:
>        pass

>    if not IPShellEmbed or IPOFF:
>        if localvars == None:
>            localvars = sys._getframe(0).f_back.f_locals        #
extract locals from the calling frame - taken from IPython
>        from code import InteractiveConsole
>        con = InteractiveConsole(localvars)
>        con.interact()
>    else:
>        banner = 'Movable Python\nIPython Interactive Shell. See the
manual for a list of features and tips.\nCtrl-D to exit.'
>        argv = ['-ipythondir', libdir]              # where to find
the ipython config file
>        ipshell = IPShellEmbed(argv, banner=banner)
>        ipshell()

http://sourceforge.net/projects/movpy
Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From peter at engcorp.com  Sat Feb 19 15:00:19 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 19 Feb 2005 15:00:19 -0500
Subject: PyGTA next meeting: Tuesday February 22,
 7-9pm at offices of Frogware (not our usual location!)
Message-ID: <mailman.2910.1109041108.22381.python-announce-list@python.org>

We're announcing here in case anyone who doesn't subscribe to our
announcement mailing list was thinking of attending:

   NOTE the change in location from where we've been meeting for the
   last 12 months!!

The next meeting of PyGTA, the Toronto-area Python user group, will be
held at the offices of Frogware (http://www.frogware.com/) at:

   477 Richmond Street West,
   Suite 210, Toronto, Ontario

on Tuesday, February 22nd, 2005, 7pm to 9pm.

Here's a link using the Google Maps Beta:
http://maps.google.com/maps?q=477%20Richmond%20Street%20West%2C%20Toronto

Note also that as of this moment, we have no official speaker.  If
you would like to reserve time to talk about your own Python-related
project, please let us know!

-Ian and Peter, meeting organizers

P.S.:  We'd also like to take this opportunity to publicly
thank Givex (http://web.givex.com/) and D'Arcy Cain for generously
hosting our meetings for the last year.


From lfdl at hotmail.com  Mon Feb 21 19:14:40 2005
From: lfdl at hotmail.com (GuyBrush Treepwood)
Date: Tue, 22 Feb 2005 01:14:40 +0100
Subject: wxPython
Message-ID: <pan.2005.02.22.00.14.32.83617@hotmail.com>

I just compiled and installed wxWidgets and wxPython.
When I want to test this libraries, I get:


Python 2.4 (#1, Feb 19 2005, 19:24:31)
[GCC 3.3.4] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from wxPython.wx import *
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/local/lib/python2.4/site-packages/wx-2.5.3-gtk2-ansi/wxPython/__init__.py", line 10, in ?
    import _wx
  File "/usr/local/lib/python2.4/site-packages/wx-2.5.3-gtk2-ansi/wxPython/_wx.py", line 3, in ?
    from _core import *
  File "/usr/local/lib/python2.4/site-packages/wx-2.5.3-gtk2-ansi/wxPython/_core.py", line 15, in ?
    import wx._core
  File "/usr/local/lib/python2.4/site-packages/wx-2.5.3-gtk2-ansi/wx/__init__.py", line 42, in ?
    from wx._core import *
  File "/usr/local/lib/python2.4/site-packages/wx-2.5.3-gtk2-ansi/wx/_core.py", line 4, in ?
    import _core_
ImportError: libwx_gtk2_xrc-2.5.so.3: cannot open shared object file: No such file or directory

I installed wxWidgets in /opt/wx/2.5 as described in
http://www.wxpython.org/BUILD.html.

$ls /opt/wx/2.5/lib | grep wx
libwx_baseud-2.5.so@
libwx_baseud-2.5.so.3@
libwx_baseud-2.5.so.3.0.0*
libwx_baseud_net-2.5.so@
libwx_baseud_net-2.5.so.3@
libwx_baseud_net-2.5.so.3.0.0*
libwx_baseud_xml-2.5.so@
libwx_baseud_xml-2.5.so.3@
libwx_baseud_xml-2.5.so.3.0.0*
libwx_gtk2ud_adv-2.5.so@
libwx_gtk2ud_adv-2.5.so.3@
libwx_gtk2ud_adv-2.5.so.3.0.0*
libwx_gtk2ud_core-2.5.so@
libwx_gtk2ud_core-2.5.so.3@
libwx_gtk2ud_core-2.5.so.3.0.0*
libwx_gtk2ud_gizmos-2.5.so@
libwx_gtk2ud_gizmos-2.5.so.3@
libwx_gtk2ud_gizmos-2.5.so.3.0.0*
libwx_gtk2ud_gl-2.5.so@
libwx_gtk2ud_gl-2.5.so.3@
libwx_gtk2ud_gl-2.5.so.3.0.0*
libwx_gtk2ud_html-2.5.so@
libwx_gtk2ud_html-2.5.so.3@
libwx_gtk2ud_html-2.5.so.3.0.0*
libwx_gtk2ud_ogl-2.5.so@
libwx_gtk2ud_ogl-2.5.so.3@
libwx_gtk2ud_ogl-2.5.so.3.0.0*
libwx_gtk2ud_stc-2.5.so@
libwx_gtk2ud_stc-2.5.so.3@
libwx_gtk2ud_stc-2.5.so.3.0.0*
libwx_gtk2ud_xrc-2.5.so@
libwx_gtk2ud_xrc-2.5.so.3@
libwx_gtk2ud_xrc-2.5.so.3.0.0*
wx/

I seem to have the necessary libraries installed, but with a *ud* pattern
in their name.

Any advice here?



From adam at cognitcorp.com  Tue Feb 15 19:54:02 2005
From: adam at cognitcorp.com (Adam DePrince)
Date: Tue, 15 Feb 2005 19:54:02 -0500
Subject: Iterator / Iteratable confusion
In-Reply-To: <cuu3p0$55n$1@sea.gmane.org>
References: <420a5c1e$0$21630$a1866201@visi.com>
	<slrnd0q67t.52v.curty@einstein.electron.net>
	<200502131848.03655.francis.girard@free.fr>
	<200502131958.27410.francis.girard@free.fr><cuolu7$qv7$1@sea.gmane.org>
	<cuooip$1pd$1@sea.gmane.org><curt3v$lmf$1@sea.gmane.org>
	<cuthdk$dnq$1@sea.gmane.org>  <cuu3p0$55n$1@sea.gmane.org>
Message-ID: <1108515242.4371.9.camel@localhost.localdomain>

On Tue, 2005-02-15 at 19:25, Terry Reedy wrote:
> "Michael Spencer" <mahs at telcopartners.com> wrote in message 
> news:cuthdk$dnq$1 at sea.gmane.org...
> 
> > Terry, thanks for responding in depth.
> We are both interested in the murky edges at and beyond conventional usage.
> > Terry wrote
> >> 2. "It is not essential to not do something wasteful as long as it is >> 
> >> otherwise inconsequential."
> > Not that "iter(iterator) is iterator" is somehow wasteful (actually it > 
> > seems  conservative), but rather that alternative behavior is readily 
> > implmented.
> What I was pointing to as wasteful is the application of your alternative 
> behavior where an object is replaced by a copy and then effectively tossed.
> > However, I suggest that there may be cases where
> > "iter(iterator) is not iterator" is useful behavior.
> I am quite aware that multiple iterators for the same iterable (actual or 
> conceptual) can be useful (cross products, for example).  But I am dubious 
> that initialized clones of 'iterators' are *more* useful, especially for 
> Python, than multiple iterators derived from repeated calling of the 
> callable that produced the first iterator.  It might be different if Python 
> were a prototype/clone language rather than a typeclass/instance language. 
> It is also possible that we have slightly different ideas of 'useful' in 
> the Python context.
> In your example, as I pointed out, A.__iter__ and AnIterator.__iter__ have 
> the same code, so I could not see any advantage to getting a copy through 
> calling the latter instead of the former.  For the disadvantage, see below.
> >  What to call such an object is another matter.
> spencerator ;-?
> Here are some related reasons why I think it useful if not essential to 
> restrict the notion of iterator by restricting  iterator.__iter__ to 
> returning self unmodified.
> Leaving Python aside, one can think of iterable as something that 
> represents a collection and that can produce an iterator that produces the 
> items of the collection one at a time.  In this general conceptioning, 
> iterables and iterators seem distinct (if one ignores self-iterables).  In 
> Python, giving iterators an __iter__ method, while quite useful, erases 
> (confuses) the (seeming) distinction, but giving them a minimal __iter__ 
> does so minimally, keeping iterators a distinct subcategory of iterable. 
> Spencerators confuse the distinction more than minimally and define a 
> vaguer subcategory.
> Essential?  For something defined as minimal, it is essential that it be 
> minimal.  But you point seems to be that it is not essential that iterator 
> be so defined.  Ok.
> (Aside: an iterator can be thought of as representing the sequence of 
> future .next() returns.  From this viewpoint, making iterators a 
> subcategory of iterable is more than just a convenience.)
> Taking Python as it is, a useful subcategory of iterable is 'reiterable'. 
> This is distinct from iterator strictly defined.  This we have iterables 
> divided into iterators, reiterables, and other.  I think this is 
> didactically useful.  Spencerators are reiterables.
> Iter(iterator) returning iterator unchanged makes iterator a fixed point of 
> iter.  It ends any chain of objects returned by repeated iter calls. 
> Spencerators prolong any iter chain, making it infinite instead of finite. 
> Essential?  Repeat the paragraph above with 'a fixed point' substituted for 
> 'minimal'.

How is spencerator different than itertools.tee?


Adam DePrince 




From farcepest at gmail.com  Thu Feb 17 22:10:23 2005
From: farcepest at gmail.com (Andy Dustman)
Date: 17 Feb 2005 19:10:23 -0800
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <slrnd1af5t.16s3.dima@beaver.trit.org>
References: <mailman.2728.1108595128.22381.python-list@python.org>
	<4214fea9$0$20394$636a15ce@news.free.fr>
	<1108686001.198554.21520@g14g2000cwa.googlegroups.com>
	<slrnd1af5t.16s3.dima@beaver.trit.org>
Message-ID: <1108696223.190228.325840@z14g2000cwz.googlegroups.com>

Looking at the code, it seems that if it finds a unicode object on the
first pass (the sizing pass), it punts and returns PyUnicode_Join(self,
seq), which is the sequence from above and not necessarily the original
object (orig), and starts over. In the worst-case scenario, you have a
long sequence of strings with one unicode string at the end...

Actually, I guess I'm a little surprised that str.join(arg) doesn't
require arg to be an iterator that returns str instances.
unicode.join(arg) can afford to be a little more flexible. I wonder how
common it is to pass a mixture of str and unicode to str.join().



From mwm at mired.org  Thu Feb 17 20:05:09 2005
From: mwm at mired.org (Mike Meyer)
Date: Thu, 17 Feb 2005 19:05:09 -0600
Subject: [Fwd: Re: [Uuu-devel] languages] <-- Why Python
References: <mailman.2781.1108677768.22381.python-list@python.org>
	<1108678805.542584.171930@z14g2000cwz.googlegroups.com>
	<mailman.2783.1108679758.22381.python-list@python.org>
Message-ID: <864qgaisoq.fsf@guru.mired.org>

Arich Chanachai <macrocosm at fastmail.fm> writes:

> These last two points kind of diverge from the point, no?  What I mean
> is that we want to present the argument of why Python is the best
> choice as THE built-in programming language for the revolutionary uuu
> operating system.

A new operating system shouldn't be picking "THE" built-in programming
language. It should instead be providing mechanisms to allow arbitrary
programming languages to be used wherever they are required. Tying the
users of the OS - or of some application - down to a specific language
is a disservice to the developers and users of that OS or application.

While Python is an excellent language, and has a nice implementation
for embedding/extending applications, it's not necessarily the best
choice for all problems. You're be doing much better for your users to
allow them to choose the right language for the problem than to
dictate the language that has to be used.

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From luismgz at gmail.com  Tue Feb  8 22:21:24 2005
From: luismgz at gmail.com (Luis M. Gonzalez)
Date: 8 Feb 2005 19:21:24 -0800
Subject: Learning Python - resources and ideas
In-Reply-To: <mailman.2196.1107879363.22381.python-list@python.org>
References: <1107855763.533466.254380@c13g2000cwb.googlegroups.com>
	<mailman.2196.1107879363.22381.python-list@python.org>
Message-ID: <1107919284.128799.316600@g14g2000cwa.googlegroups.com>

Regarding rec.photo.equipment.35mm... this is not his fault.
Yesterday I tried posting to comp.lang.python and, for some strange
reason, it was posted momentarily to this group.

Regarding Cody's question:
If you are an absolute newby, try Josh Cogliati's python tutorial for
non-programmers (google this).
I learned the basics with it.

Then you can try any of the other resources listed in www.python.org.
If you're willing to buy a book, try "Learning Python 2nd.Ed" by Mark
Lutz or "Core Python" by Wesley Chun.

Regards,
Luis



From irmen.NOSPAM at xs4all.nl  Fri Feb 11 12:45:45 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Fri, 11 Feb 2005 18:45:45 +0100
Subject: is there a safe marshaler?
In-Reply-To: <3b091a1c.0502110634.5edb1987@posting.google.com>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<420b6e98$0$23018$626a14ce@news.free.fr>
	<420b9135$0$28982$e4fe514c@news.xs4all.nl>
	<3b091a1c.0502110634.5edb1987@posting.google.com>
Message-ID: <420cef48$0$28977$e4fe514c@news.xs4all.nl>

cmkl wrote:
> but can't effbot's fast cElementree be used for PYROs XML_PICKLE 
> and would it be safe and fast enough?

ElementTree's not a marshaler.
Or has it object (de)serialization included?

--Irmen


From michele.simionato at gmail.com  Tue Feb 22 05:15:37 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 22 Feb 2005 02:15:37 -0800
Subject: pydoc documentation
In-Reply-To: <mailman.2927.1109065915.22381.python-list@python.org>
References: <mailman.2927.1109065915.22381.python-list@python.org>
Message-ID: <1109067337.009677.32380@c13g2000cwb.googlegroups.com>

$ pydoc -g


        M.S.



From alan.mcintyre at esrgtech.com  Sat Feb  5 09:12:42 2005
From: alan.mcintyre at esrgtech.com (Alan McIntyre)
Date: Sat, 05 Feb 2005 09:12:42 -0500
Subject: Trouble converting hex to decimal?
In-Reply-To: <mailman.1968.1107611497.22381.python-list@python.org>
References: <mailman.1968.1107611497.22381.python-list@python.org>
Message-ID: <vv4Nd.103638$Jk5.96340@lakeread01>

Earl,

Try this:

 >>> ord('\x00')
0

or:

 >>> import struct
 >>> struct.unpack('b', '\x00')
(0,)

If you're needing to pull values out of multiple bytes (shorts, longs, 
floats, etc.), have a look at the struct module. Here's an example:

 >>> struct.unpack('f', '\x00\x00(B')
(42.0,)

Hope this helps,
Alan

Earl Eiland wrote:
> I'm trying to process the IP packet length field, as recorded by pcap
> (Ethereal) and recovered using pcapy.  When I slice out those bytes, I
> get a value that shows in '\x00' format, rather than '0x00'.  Neither
> int() nor eval() are working.  How do I handle this?
> 
> Earl Eiland
> 


From bpeng at rice.edu  Sun Feb 27 15:03:26 2005
From: bpeng at rice.edu (Bo Peng)
Date: Sun, 27 Feb 2005 14:03:26 -0600
Subject: default value for list access?
In-Reply-To: <cvsumh$7i2$1@joe.rice.edu>
References: <cvsumh$7i2$1@joe.rice.edu>
Message-ID: <cvt92e$fkj$1@joe.rice.edu>

To clearify the problem:

The data is the count of something, for example a[90]=10. a may be a 
dictionary if the range is huge and a list when the range is reasonably 
small. In the dictionary case, I can use a.setdefault(80, 0) if key 80 
does not exist. In the list case, I have to check the length of list 
before I access it (or use exception).

This becomes troublesome when I need to do the following a lot.

   b = a[80][1] + a[80][2] + a[80][3]

If I use the getItem function in my previous email, it will look like

   b = getItem(getItem(a, 80, []), 1, 0) + getItem(getItem(a, 80, []), 
2, 0) + getItem(getItem(a, 80, []), 3, 0)

What would be the best solution to handle this? Something like

   b = df( a[80][1], 0) + df( a[80][2], 0) + df( a[80][3], 0)

would be reasonable but df can not be easily defined since the exception 
will be raised before function df is called. Something like

   b = df( a, [80, 1], 0) + df( a, [80,2], 0) + df( a, [80, 3], 0)

would work if df is defined as

def df(a, idx, default):
   try:
     for i in range(0, idx):
       a = a[ idx[i] ]
     return a
   except:
     return 0

but I am afraid that a for loop would bring serious performance problem.

Thanks.

Bo


From cjw at sympatico.ca  Wed Feb 16 12:56:12 2005
From: cjw at sympatico.ca (Colin J. Williams)
Date: Wed, 16 Feb 2005 12:56:12 -0500
Subject: Multidimensional arrays - howto?
In-Reply-To: <1108423310.463006.318320@f14g2000cwb.googlegroups.com>
References: <1108423310.463006.318320@f14g2000cwb.googlegroups.com>
Message-ID: <4213893C.3050204@sympatico.ca>

doodle4 at gmail.com wrote:
> Hello all,
> 
> I am trying to convert some C code into python. Since i am new to
> python, i would like to know how to deal with multidimensional arrays?
> 
> Thanks,
> -Joe
> 
> Here's a snippet of what i am trying to convert:
> 
> # define table0 15
> # define table1 20
> 
> unsigned int Table[table0][table1]
> 
> if(Table[table0][table1] != 0)
>     {
>          Table[table0][table1]--
>     }
> 
You might consider numarray.  This is a package which is downloadable 
from Source Forge and intended for numeric and other arrays.

Colin W.


From morphex at gmail.com  Fri Feb 18 10:18:06 2005
From: morphex at gmail.com (morphex)
Date: 18 Feb 2005 07:18:06 -0800
Subject: Platform independent adduser script?
Message-ID: <1108739886.550370.231620@g14g2000cwa.googlegroups.com>

Hi there,

does anyone here know of a script that enables adding of users on UNIX
platforms via python?

Thanks,

Morten



From adam at cognitcorp.com  Sun Feb  6 02:20:34 2005
From: adam at cognitcorp.com (Adam DePrince)
Date: Sun, 06 Feb 2005 02:20:34 -0500
Subject: pickle/marshal internal format 'life expectancy'/backward
	compatibility
In-Reply-To: <1f7befae05020514046ab10822@mail.gmail.com>
References: <1107640264.7097.5.camel@localhost>
	<1f7befae05020514046ab10822@mail.gmail.com>
Message-ID: <1107674434.3948.19.camel@localhost.localdomain>

On Sat, 2005-02-05 at 17:04, Tim Peters wrote:
> [Philippe C. Martin]
> > I am looking into using the pickle format to store object/complex data
> > structures into a smart card as it would make the design of the embedded
> > application very simple.
> >
> > Yet the card might have to stay in the pocket of the customer for a few
> > years, during which the back office application responsible for
> > retrieving the information from the card might evolve as well as the
> > python release it relies upon.
> >
> > Is there a commitment for python releases to be able to interpret
> > 'older' pickle/marshal internal formats ?
> 
> Pickle and marshal have nothing in common, and there's no
> cross-release guarantee about marshal behavior.  Pickles are safe in
> this respect; indeed, each Python released to date has been able to
> load pickles created by all earlier Python releases.  Of course a
> pickle produced by a later Python may not be loadable by an earlier
> Python, although even in that direction you can get cross-release
> portability by forcing the newer Python to restrict itself to produce
> obsolete pickle formats.  Reading Lib/pickletools.py in a current
> release will explain all this.


How complicated is your data structure?  Might you just store:

repr( <mydatastructure> )

and eval it later?  Trust is an issue; you are vulnerable to malicious
code, but no more so than with pickle or marshal.

One quick and dirty way to be a little safer is to "sign" the data you
store.

# To save your data
import sha
import cPickle
mysecret = "abc"
mydata = {"what":"my data structure"}
f = open( "/tmp/myfile.txt", "w+" )
mydata = cPickle.dumps( mydata, protocol=0 )
# I'm assuming this is a flash device ... lets be safe and not assume
# that write is buffered ... 
f.write( sha.new( mysecret + mydata ).digest() + mydata)



# To load your data
import sha
import cPickle
mysecret = "abc
f = open( "/tmp/myfile.txt", "w+" )
hash = f.read( sha.digest_size )
mydata = f.read()
if sha.new( mysecret + mydata ).digest() != hash:
	raise "Somebody is tring to hack you!" 
mydata = cPickle.loads( mydata )

Of course, the security of this scheme is dependent on a lot, including
the strength of sha, your ability to keep your secret key secret, the
correctness of what I'm saying, etc etc etc.




Adam DePrince 




From bpeng at rice.edu  Sun Feb 27 16:39:04 2005
From: bpeng at rice.edu (Bo Peng)
Date: Sun, 27 Feb 2005 15:39:04 -0600
Subject: default value for list access?
In-Reply-To: <huqdnXh59cf7sr_fRVn-pw@powergate.ca>
References: <cvsumh$7i2$1@joe.rice.edu> <cvt92e$fkj$1@joe.rice.edu>
	<huqdnXh59cf7sr_fRVn-pw@powergate.ca>
Message-ID: <cvtelo$jgn$1@joe.rice.edu>


> Sounds to me like the best solution is to simplify the implementation
> and dispense with the list alternative.  Why use a list if a dictionary
> is suitable?  Don't say performance: that's premature optimization.
> Dictionaries already have what you need, apparently, with setdefault(),
> so just use them and keep the code simple.

You are right that if I use all dictionaries, I can use
   a.setdefault(4,{}).setdefault(2,0)
to access a[4][2]. Not too bad compared to the getItem function.

However, this is an scientific application. Data are stored internally 
in C format and exposed to Python as python array (arraymodule). I guess 
the best way is to modify the arraymodule interface and stop it from 
raising an exception when index is out of range. (similar to Ruslan's 
solution). But this means too much trouble for now.

I will use the df(a, idx, default) method and see if its performance is 
acceptable.

Thanks.
Bo



From sylvain.thenault at logilab.fr  Fri Feb  4 05:59:22 2005
From: sylvain.thenault at logilab.fr (Sylvain Thenault)
Date: Fri, 04 Feb 2005 11:59:22 +0100
Subject: making symlinks with distutils
References: <1107513934.428944.257820@z14g2000cwz.googlegroups.com>
Message-ID: <pan.2005.02.04.10.59.14.434381@logilab.fr>

On Fri, 04 Feb 2005 02:45:34 -0800, Michele Simionato wrote:

> I want to distribute a pure Python package with this structure:
> 
>>    mypackage
>>         __init__.py
>>         module1.py
>>         module2.py
>>         ...
>>         myexecutable.py
> 
> In particular, myexecutable.py is a script which is intended to be used
> from the command line via the shebang trick. I want to distribute on
> Unices.
> and I want a symlink
> 
> /usr/bin/myexecutable -> <package-path>/mypackage/myexecutable.py
> 
> to be made at installation time, when the user runs "python setup.py
> install".
> 
> What is the recommanded way to do that? Do I need a postinstallation
> script or something like that?
> 
> I could do that in various way, but I don't see the obvious one, maybe
> because I am not a Dutch ;)

i'm not sure there is a standard way to do so with distutils.
My current way to handle executable scripts is to have a run() function in
the myexecutable.py module, and then to have a very simple myexecutable
script with the following content:

#!/usr/bin/python
from mypackage import myexecutable
myexecutable.run()

And then register this script using distutils'"scripts" keyword argument. 
This has the advantage that I can also create a very simple .bat file for
windows users without code duplication.

-- 
Sylvain Th?nault                               LOGILAB, Paris (France).

http://www.logilab.com   http://www.logilab.fr  http://www.logilab.org




From groleo at gmail.com  Tue Feb 22 03:12:49 2005
From: groleo at gmail.com (Groleo Marius)
Date: Tue, 22 Feb 2005 10:12:49 +0200
Subject: Execute a list
Message-ID: <a54d2e2305022200123efce04f@mail.gmail.com>

Hi.
How can i execute a string in python?
For example if I have the variable s, defined below
s = '"print "hello"'
How can I execute the code that "s" keeps inside, considering that the
code is correct?


From erikbethke at gmail.com  Wed Feb  9 09:31:33 2005
From: erikbethke at gmail.com (Erik  Bethke)
Date: 9 Feb 2005 06:31:33 -0800
Subject: Trouble with the encoding of os.getcwd() in Korean Windows
In-Reply-To: <1107959130.925848.91910@l41g2000cwc.googlegroups.com>
References: <1107953764.478501.176650@c13g2000cwb.googlegroups.com>
	<cud2nj$det$1@news6.zwoll1.ov.home.nl>
	<1107956992.350460.12720@f14g2000cwb.googlegroups.com>
	<1107958914.583017.79190@l41g2000cwc.googlegroups.com>
	<1107959130.925848.91910@l41g2000cwc.googlegroups.com>
Message-ID: <1107959493.948056.211700@c13g2000cwb.googlegroups.com>

Wow, even more information.  When I set my default browser to IE, it
launches fine... so it is something about FireFox being more picky than
IE...

Where would I hunt down this sort of problem?  Sounds rare, should I
contact Mozilla, or can you guys spot something silly I am doing?

Thank you,
-Erik



From exogen at gmail.com  Wed Feb 16 17:15:42 2005
From: exogen at gmail.com (Brian Beck)
Date: Wed, 16 Feb 2005 17:15:42 -0500
Subject: Getting milliseconds in Python
In-Reply-To: <mailman.2706.1108577006.22381.python-list@python.org>
References: <1108565135.167562.196830@z14g2000cwz.googlegroups.com><37h5epF5ck38lU2@individual.net><1108571009.698970.152020@z14g2000cwz.googlegroups.com>	<cv0100$715$1@eeyore.INS.cwru.edu>
	<mailman.2706.1108577006.22381.python-list@python.org>
Message-ID: <cv0gru$802$1@eeyore.INS.cwru.edu>

Fredrik Lundh wrote:
> Brian Beck wrote:
> 
> 
>>That IS what you want.
>>
>>seconds * 100 = milliseconds
> 
> 
> are you sure you know what a millisecond is?
> 
> (duck) 

Touch?.

But it was a typo.

--
Brian Beck
Adventurer of the First Order


From calvin at ironfroggy.com  Mon Feb 28 14:28:00 2005
From: calvin at ironfroggy.com (Calvin Spealman)
Date: Mon, 28 Feb 2005 19:28:00 +0000
Subject: Scoping issue with import
References: <200502281556.39680.jstroud@mbi.ucla.edu>
Message-ID: <2119925.1gXpuWuGCO@ironfroggy.com>

Each module is only 'aware' of the built-ins and the modules it itself
imports. So, all you need to do is add this line to my_imported_mod:

from my_main_mod import myfun

This is a fully intentional feature. Modules stand on their own.

James Stroud wrote:

> Say I have a module, we'll call it "my_imported_mod". It contains a
> function in it that calls another function, "myfun". The "myfun" function
> is in the module "my_main_mod", that imports "my_imported_mod".
> 
> The code of "my_main_mod" might look like this:
> ==============
> from my_imported_mod import *
> 
> def myfun():
>   print "stuff"
> ==============
> 
> the code of "my_imported_mod" might look like this:
> ==============
> def somefun():
>   myfun()
> ==============
> 
> When trying to execute the function somefun(), I get a
> NameError: global name 'myfun' is not defined
> 
> How to rectify this with minimal code change? How to let imported modules
> know about the namespace they are getting imported into? I do not want to
> restructure my code right now.
> 
> Thanks in advance for help.
> 
> James

-- 
 



From fredrik at pythonware.com  Sun Feb 20 07:09:47 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 20 Feb 2005 13:09:47 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr><42172136$0$27576$9b622d9e@news.freenet.de><cv7i57$d0v$1@usenet.otenet.gr>	<cv7k8e$4pa$03$1@news.t-online.com><cv7m2m$gp$1@usenet.otenet.gr><mailman.2837.1108832106.22381.python-list@python.org>
	<cv9sd9$69n$2@usenet.otenet.gr>
Message-ID: <cv9ufh$56b$1@sea.gmane.org>

Ilias Lazaridis wrote:

>>>Should a professional developer take python serious?
>>
>> yes.
>
> Should I take answers serious?

yes.

> Answer from people which do not respect coherence of writings?

coherence of writings?

</F> 





From martin at v.loewis.de  Sat Feb 19 06:21:26 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 19 Feb 2005 12:21:26 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cuo71l$gig$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
Message-ID: <42172136$0$27576$9b622d9e@news.freenet.de>

Ilias Lazaridis wrote:
> My questions:

It appears that nobody has answered the questions, yet.

> a) Why does the Python Foundation not provide additionally a binary 
> version, compiled with MinGW or another open-source compiler?

We don't have the resources to do that.

> b) Why does the Python Foundation not ensure, that the python 
> source-code is directly compilable with MinGW?

In the past, we did not do that because we did not know how to do it.
With Python 2.4.1, we now had a contribution that should allow direct
compilation of extensions using MingW.

> c) Why are the following efforts not _directly_ included in the python 
> source code base?
> 
> http://jove.prohosting.com/iwave/ipython/pyMinGW.html

I believe this was because it was never contributed to Python.

> d) Is it really neccessary that I dive into such adventures, to be able 
> to do the most natural thing like: "developing python extensions with 
> MinGW"?
> 
> http://starship.python.net/crew/kernr/mingw32/Notes.html

No. These instructions are outdated.

> e) Is there any official statement available regarding the msvcr71.dll 
> and other MS licensing issues?
> 
> [see several threads "[Python-Dev] Is msvcr71.dll re-redistributable?"]
> 
> http://mail.python.org/pipermail/python-dev/2005-February/thread.html

No, there isn't.

> f) Are there any official (Python Foundation) statements / rationales 
> available, which explain why the MinGW compiler is unsupported, although 
> parts of the community obviously like to use it?
> 
> http://groups-beta.google.com/group/comp.lang.python/msg/dc3474e6c8053336

The official statement is that the MingW compiler is supported, indeed.

Regards,
Martin


From http  Thu Feb  3 23:42:26 2005
From: http (Paul Rubin)
Date: 03 Feb 2005 20:42:26 -0800
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<mailman.1857.1107479377.22381.python-list@python.org>
	<7xis59qgaz.fsf@ruckus.brouhaha.com>
	<mailman.1864.1107490291.22381.python-list@python.org>
Message-ID: <7xvf99ndfx.fsf@ruckus.brouhaha.com>

Skip Montanaro <skip at pobox.com> writes:
> It's more than a bit unfair to compare Wikipedia with Ebay or
> Google.  Even though Wikipedia may be running on high-performance
> hardware, it's unlikely that they have anything like the underlying
> network structure (replication, connection speed, etc), total number
> of cpus or monetary resources to throw at the problem that both Ebay
> and Google have.  I suspect money trumps LAMP every time.

I certainly agree about the money and hardware resource comparison,
which is why I thought the comparison with 1960's mainframes was
possibly more interesting.  You could not get anywhere near the
performance of today's servers back then, no matter how much money you
spent.  Re connectivity, I wonder what kind of network speed is
available to sites like Ebay that's not available to Jane Webmaster
with a colo rack at some random big ISP.  Also, you and Tim Danieliuk
both mentioned caching in the network (e.g. Akamai).  I'd be
interested to know exactly how that works and how much difference it
makes.

But the problems I'm thinking of are really obviously with the server
itself.  This is clear when you try to load a page and your browser
immediately get the static text on the page, followed by a pause while
the server waits for the dynamic stuff to come back from the database.
Serving a Slashdotting-level load of pure static pages on a small box
with Apache isn't too terrible ("Slashdotting" = the spike in hits
that a web site gets when Slashdot's front page links to it).  Doing
that with dynamic pages seems to be much harder.  Something is just
bugging me about this.  SQL servers provide a lot of capability (ACID
for complicated queries and transactions, etc). that most web sites
don't really need.  They pay the price in performance anyway.

> We also know Google has thousands of CPUs (I heard 5,000 at one point and
> that was a couple years ago).

It's at least 100,000 and probably several times that ;-).  I've heard
every that search query does billions of cpu operations and crunches
through 100's of megabytes of data (search on "apple banana" and there
are hundreds of millions of pages with each word, so two lists of that
size must be intersected).  100,000 was the published number of
servers several years ago, and there were reasons to believe that they
were purposely understating the real number.


From steve at holdenweb.com  Wed Feb  2 18:02:39 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 02 Feb 2005 18:02:39 -0500
Subject: Getting a module's byte code, how?
In-Reply-To: <42015854$0$28986$e4fe514c@news.xs4all.nl>
References: <42014e25$0$28975$e4fe514c@news.xs4all.nl>
	<pan.2005.02.02.22.06.22.395829@freelance-developer.com>
	<CxcMd.102641$Jk5.35575@lakeread01>
	<42015854$0$28986$e4fe514c@news.xs4all.nl>
Message-ID: <42015C0F.7040803@holdenweb.com>

Irmen de Jong wrote:

> Steve Holden wrote:
> 
>> Having said which, if the module was loaded from a .pyc file then the 
>> bytecode is available from that - take everything but the first eight 
>> bytes and use marshal.loads() to turn it back into a code object:
> 
> 
> Yup. As I explained in the other message, this is basically
> what I'm doing at the moment (with a few twists; it reads the .py
> file if no .pyc is available).
> But I also want the bytecode of modules that don't have a .pyc file,
> possibly because they have already been 'dynamically' loaded from
> another bytecode string ;-)
> 
Aah, right, I suspect in these cases (which *are* pretty far from the 
ordinary run of things) you'd sometimes be up the creek without a paddle.

> Now, I could ofcourse store the bytecode string that I started
> with *inside* the module itself, in a special attribute or so.
> This just occurred to me and I think it's a possible solution.
> But the bytecodes must be stored by Python itself somewhere
> already... because Python is able to execute my module... right?

Not necessarily. I've just been playing with importing modules from a 
database. Here's the relevant extract from my load_module() function:

         code, package, path = row # ... from the database
         code = marshal.loads(code)
         module = DBmodule(modname) # subclass of moduleType
         sys.modules[modname] = module
         module.__name__ = modname
         module.__file__ = path # "db:%s" % modname
         module.__loader__ = dbimporter
         if package:
             module.__path__ = ["*db*"]
         exec code in module.__dict__
         #print modname, "loaded:", module, "pkg:", package
         return module

Note well that the module is essentially imported by executing its 
bytecode in the context of the module's directory. From that point on 
the module doesn't need access to its code - all its functions and 
classes have been created, and the functions and methods reachable from 
the module's __dict__ now have appropriate snippets of the byte code as 
their own code objects.

> I want them! :-)
> 
Well I'm afraid there's no guarantee that they haven't already been 
garbage collected, and stamping your foot isn't going to do any good :-)

>> Note that the ugly details *might* change, and that byte codes are 
>> version-dependent.
> 
> 
> I know, but this fact was not yet mentioned in the Pyro manual.
> Thanks for reminding me, I'll add it.
> 
> --Irmen

A pleasure. Thanks for Pyro! (and thanks for reminding me indirectly 
that I need to guard that execution of hte module's code against 
exceptions).

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005          http://www.python.org/pycon/2005/
Steve Holden                           http://www.holdenweb.com/


From sjmachin at lexicon.net  Mon Feb 28 16:12:20 2005
From: sjmachin at lexicon.net (John Machin)
Date: 28 Feb 2005 13:12:20 -0800
Subject: cannot open file in write mode, no such file or directory
In-Reply-To: <1109620212.056771.77930@o13g2000cwo.googlegroups.com>
References: <1109618906.347448.218700@o13g2000cwo.googlegroups.com>
	<1109619707.033450.227120@f14g2000cwb.googlegroups.com>
	<1109620212.056771.77930@o13g2000cwo.googlegroups.com>
Message-ID: <1109625140.228067.156390@o13g2000cwo.googlegroups.com>


haynesc at gmail.com wrote:
> Kartic wrote:
> > > I'm having a problem where when trying to open a file in write
> mode,
> > I
> > > get an IOError stating no such file or directory.  I'm calling an
> > > external program which takes an input file and produces an output
> > file
> > > repeatedly, simulating the input file separately for each
> replicate.
> > > The error occurs when trying to open the input file to write out
> the
> > > new data.  The problem is difficult to reproduce since it only
> shows
> > up
> > > once every few thousand replicates.  I've tried using both
> os.system
> >
> > I am afraid you need to give more information that just IOError,
> > calling an external program.
> >
> > Please post the exact message including the input filename at the
> time
> > the program went down. If you don't print the filename, please
modify
> > your program to do so.
> >
> > A shot in the dark solution to your problem might be that you are
> > dynamically  generating a filename and that filename probably
> contains
> > characters not allowed by the local file system OR you generate a
> path
> > that does not exist. For open() to work with the 'w' flag, the path
> > where the file you say should be created should exist.
> >
> > Thanks,
> > -Kartic
>
> Sorry, here is the exact error:
>
> Traceback (most recent call last):
>  File "hapSim.py", line 415, in ?
>    run(REPLICATES, dsSelection, permuteStatus, sigThreshold
>  File "hapSim.py", line 354, in run
>    createInput(dt)
>  File "hapSim.py", line 178, in createInput
>    inF = open(IN_FNAME, "w")
> IOError: [Errno 2] No such file or directory: 'prog.input'
>
> I am using the same file name repeatedly, it works fine the first few
> thousand times, but eventually gives this error.

1. Exactly how many is "few thousand"? Is it the same number each time?
Does the problem still happen if you don't run the external program,
but just create the input file a few thousand times?

2. Which version of Windows are you using, and what type of filesystem?
When it dies, how many files exist in the directory where you are
trying to create "prog.input"? Reason for asking: I vaguely recall
problems with FAT-type filesystems where there was a rather low limit
on the number of files that could be recorded in a directory, PLUS a
rather misleading "errno" being returned when one hit the limit.



From john_sips_teaz at yahooz.com  Tue Feb  8 11:46:36 2005
From: john_sips_teaz at yahooz.com (John M. Gabriele)
Date: Tue, 08 Feb 2005 11:46:36 -0500
Subject: Is Python as capable as Perl for sysadmin work?
In-Reply-To: <87r7jr9gxv.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
	<87r7jr9gxv.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
Message-ID: <110hr73rl7g8ec@corp.supernews.com>

Nick Vargish wrote:
> "John M. Gabriele" <john_sips_teaz at yahooz.com> writes:
> 
> 
>>At some point during some dingy job in the back boiler room
>>of Unix, would you find yourself saying, "geez, I'd wish I
>>started this with Perl -- Python just isn't cutting it." ?
> 
> 
> Sometimes I have to write a quick script in Perl because Python isn't
> ubiquitous enough around here, and I often find myself thinking I
> the opposite... "Perl just isn't cutting it."
> 
> And I spent several years putting food on the table with Perl, so it's
> not like I'm a noob with Perl.
> 
> Nick
> 

Thanks Nick (and everyone else) for the replies. Much appreciated.


--
--- remove zees if replying via email ---


From drobinow at gmail.com  Thu Feb 24 08:13:41 2005
From: drobinow at gmail.com (drobinow at gmail.com)
Date: 24 Feb 2005 05:13:41 -0800
Subject: PyEphem on Win32 -- 2nd try
In-Reply-To: <mailman.2972.1109178865.22381.python-list@python.org>
References: <mailman.2972.1109178865.22381.python-list@python.org>
Message-ID: <1109250821.444086.99070@g14g2000cwa.googlegroups.com>


Flory at fdu.edu wrote:
> Has anyone run the PyEphem ephemeris application under WinXP?
> http://rhodesmill.org/brandon/projects/pyephem.html
> I have compiled it with Visual Studio 6 and it crashes Python with a
> simple
>
> >>> import ephem
> >>> ephem.date('1994/7/16')
>
> Identical code works fine under Linux. I suspect that the problem has
> to do with a parser built into the c shell for the c code that the
> app wraps around.  However, I am not good enough at c to spot the
> error.

 I had the same problem with Python 2.4. Dates appear to need a
trailing space.

  ephem.date('1994/7/16 ')
works for me.

I believe the following code in ephem.c is responsible:
     if (conversions == -1 || !conversions ||
	 (conversions == 1 && s[dchars] != '\0') ||
	 (conversions == 2 && s[tchars] != '\0')) {
	  PyErr_SetString(PyExc_ValueError,
			  "your date string does not seem to have "
			  "year/month/day followed optionally by "
			  "hours:minutes:seconds");

This may be a VC versus gcc issue. It would be interesting to see if a
Mingw compile would help here.



From ilias at lazaridis.com  Mon Feb 14 05:58:10 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Mon, 14 Feb 2005 12:58:10 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cupvhi$c15$1@news1.ucsd.edu>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
Message-ID: <cuq084$r99$1@usenet.otenet.gr>

Robert Kern wrote:
> Ilias Lazaridis wrote:
>> David Fraser wrote:
>>> Ilias Lazaridis wrote:
[...]
>>I do not "just complain".
>>
>> I've spend already hours with writing down the questionaire [which you 
>> have successfully ignored].
> 
> Why don't you spend hours writing code and submitting working patches, 
> instead? That's what I did years ago in the original effort to get mingw 
> to compile Python extensions (one of the, woefully out-dated, web-pages 
> you cite is mine. I have now edited it to clarify the situation so 
> others do not come away from it as you did).

"This page is extremely out-of-date. Not much applies anymore. This page 
only remains because too many people still point to it. PExports may 
also still be useful to some people; I don't know. I do not use this 
platform any longer."
http://starship.python.net/crew/kernr/mingw32/Notes.html

very gentle.

up-to-date information is important, especially to avoid confusing 
newcomers.

[you see: even if I just complain, one positive change has already happen]

> Just writing "questionnaires" *is* actually "just complaining."

of course not.

> The answer to most of your questions is, "Because no one has yet 
> volunteered their time and effort to get the job done."

this answer do not fit in most questions.

please review them again.

> If this is important to you, you need to step up yourself and get it 
> done and not expect other people to volunteer their unpaid time to 
> satisfy your whims.
> 
> The open source Python community is driven by volunteerism, not a sense 
> of entitlement. If this does not appeal to you, then perhaps the Python 
> community is not the right one for you.

I ask some questions and suggest some things.

Voluntarlily and without beeing paid.

There are many commercial systems around python.

So please stop this volunteerism-stuff.

-

If you like to help me and other newcomers, please give me simple some 
answers on the initial questions.

.

-- 
http://lazaridis.com


From jzgoda at gazeta.usun.pl  Wed Feb 23 15:06:52 2005
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Wed, 23 Feb 2005 21:06:52 +0100
Subject: Problem with minidom and special chars in HTML
In-Reply-To: <421c541c$1@news.uni-klu.ac.at>
References: <421b5b8c$1@news.uni-klu.ac.at> <cvg555$d3a$1@atlantis.news.tpi.pl>
	<421c541c$1@news.uni-klu.ac.at>
Message-ID: <cvio17$bi7$1@nemesis.news.tpi.pl>

Horst Gutmann napisa?(a):

>> Don't use minidom or convert HTML4 to XHTML and change declaration of 
>> doctype.
>>
> This was just a bad example :-) I get the same problem with XHTML in the 
> doctype. The funny thing here IMO is, that the special chars are simply 
> removed. No warning, no nothing :-(

As Fredrik pointed out, it's minidom that cann't fetch DTD from remote 
location. Download this DTD file to your local machine (it lies at 
exactly this URI), try changing PUBLIC identifier to SYSTEM and give 
local path to this file.

-- 
Jarek Zgoda
http://jpa.berlios.de/ | http://www.zgodowie.org/


From reinhold-birkenfeld-nospam at wolke7.net  Tue Feb  8 15:12:39 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Tue, 08 Feb 2005 21:12:39 +0100
Subject: string issue
In-Reply-To: <1grmsu7.voqhco123pqaoN%aleaxit@yahoo.com>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
	<36QMd.103084$Jk5.36127@lakeread01>
	<cu0j92$kf7$2@solaris.cc.vt.edu>
	<mailman.1913.1107547130.22381.python-list@python.org>
	<1grl717.1o4ofg7arp8c2N%aleaxit@yahoo.com>
	<36plr5F551pg8U1@individual.net>
	<1grmr97.9o27yo1xzwzd7N%aleaxit@yahoo.com>
	<36pv1dF55bt9jU1@individual.net>
	<1grmsu7.voqhco123pqaoN%aleaxit@yahoo.com>
Message-ID: <36skpnF53c5feU1@individual.net>

Alex Martelli wrote:
> Reinhold Birkenfeld <reinhold-birkenfeld-nospam at wolke7.net> wrote:
> 
>> Alex Martelli wrote:
>> 
>> > So, *WHAT ON EARTH* could possibly
>> > make this weird 'x[:]' form preferable to 'x*1'?!  It's MUCH more
>> > obvious that the second one returns an independent, separate object
>> > initially equal to x
>> 
>> .>> x = 2
>> .>> y = x*1
>> .>> x is y
>> True
>> .>>
>> 
>> just-kidding-ly yours,
> 
> You're just snipping a crucial side-observation which I had put in
> exactly to avert such irrelevant diversions:
>
>> whenever it
>> matters -- i.e., whenever x is mutable.
> 
> Immutable types are allowed to collapse any two equal but "distinct"
> objects into one identity -- that's always the case, I acknowledged that
> in my sentence which I just quoted and which you had failed to quote
> again, and I don't see what's funny in this procedure and the time it's
> wasting, for me and for every reader of this group, now and in the
> future from archives.

Well, I overread your side-observation (can happen if you don't have too
much time and are not accustomed to flying over English text) and,
though I sensed that it was bad, posted my little joke.

> I'm sure that by selectively quoting just some of your words and
> artfully omitting others I could ``make" you say, not just slightly
> imprecise things, but utter and total idiocies.  So?  What's the point
> of this "kidding"?  Next time, why don't you just omit, for example, a
> "not", when you quote me, so as to make it appear that I was saying
> exactly the reverse of what I was obviously saying?

Well, snipping single paragraphs is different from snipping words out of
them.

Sorry. Didn't mean to drive you insane -- your posts are of use, so clpy
(include me) need you in the future.

> I guess it must be time for me to go away from this group again, if my
> time on it is to me spent repeating over and over all sorts of asides
> which people "just kidding" carefully avoid quoting from my posts,
> apparently in order to make believe they caught me in anything less than
> perfect accuracy.  Cheez -- I HAVE been guilty of less than perfect
> accuracy in the past (even of outright errors), but not THIS time (if
> one has the common decency to look at ALL the words I posted, rather
> than a careful selection thereof), so I completely fail to see how you
> thought this "kidding" could be fun.

This is the hot Italian temper, I suppose ;) Of course you were right,
and I'm glad to see your posts of today.

> OK, I'm off.  Have a nice life.

Thanks, I'll do.

Reinhold


From fredrik at pythonware.com  Fri Feb  4 02:40:18 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 4 Feb 2005 08:40:18 +0100
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
References: <ctsjmg$75p$1@usenet.otenet.gr><pan.2005.02.03.19.10.39.349763@jerf.org>
	<ueCMd.22177$Ck1.1629547@news20.bellglobal.com>
Message-ID: <ctv8r8$cks$1@sea.gmane.org>

Markus Wankus wrote:

> Google his name - he has been banned from Netbeans and Eclipse (and Hibernate, and others...) for 
> good reason.  Can you imagine how much of a Troll you need to be to *actually* get "banned" from 
> the newsgroups of open source projects such as those?

have Pythoneers ever "banned" anyone from a public forum?  it's not like
we haven't seen trolls and crackpots before, you know.

</F> 





From "ben&#45;fuzzybear" at yahoo.com  Wed Feb 23 15:25:29 2005
From: "ben&#45;fuzzybear" at yahoo.com ("ben&#45;fuzzybear" at yahoo.com)
Date: Wed, 23 Feb 2005 12:25:29 -0800 (PST)
Subject: Yahoo! Auto Response
Message-ID: <20050223202531.164141E4005@bag.python.org>

Hi -

This is the "vacation" program; I'm working for my owner, Ben. The account to which you have sent your mail is going to be discontinued at at the end of July (Yahoo's mail service has deteriorated well past "abysmal" into "nightmarishly bad", and the trend shows no sign of stopping). Please update your information for Ben; his new email address is at the "callahans.org" domain under the username of "ben" (it is not shown as a complete address in order to foil stupid spambots; use it as "username at domain".)

Sorry about any inconvenience, and have a nice day.



--------------------


Original Message:


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To: ben-fuzzybear at yahoo.com
Subject: Re: Message Error
Date: Thu, 24 Feb 2005 01:55:13 +0530
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From dyoo at hkn.eecs.berkeley.edu  Thu Feb 24 21:34:42 2005
From: dyoo at hkn.eecs.berkeley.edu (Daniel Yoo)
Date: Fri, 25 Feb 2005 02:34:42 +0000 (UTC)
Subject: Flushing print()
References: <mailman.3029.1109296238.22381.python-list@python.org>
Message-ID: <cvm2s2$2gfl$1@agate.berkeley.edu>

gf gf <unknownsoldier93 at yahoo.com> wrote:
: Is there any way to make Python's print() flush
: automatically, similar to...mmm...that other
: language's $|=1 ?


Hello gf gf,

Yes; you can use the '-u' command line option to Python, which will
turn off stdout/stderr buffering.


: If not, how can I flush it manually?  sys.stdout.flush() didn't
: seem to work.

Hmmmm, that's odd.  sys.stdout.flush() should do it.  How are you
testing that stdout isn't flushing as you expect?


Best of wishes to you!


From sjmachin at lexicon.net  Fri Feb 18 18:21:10 2005
From: sjmachin at lexicon.net (John Machin)
Date: 18 Feb 2005 15:21:10 -0800
Subject: exercise: partition a list by equivalence
In-Reply-To: <mailman.2803.1108743668.22381.python-list@python.org>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<mailman.2803.1108743668.22381.python-list@python.org>
Message-ID: <1108768870.455974.244590@c13g2000cwb.googlegroups.com>


John Lenton wrote:
> On Thu, Feb 17, 2005 at 03:46:20PM -0800, Xah Lee wrote:
> > here's another interesting algorithmic exercise, again from part of
a
> > larger program in the previous series.
> >
> > Here's the original Perl documentation:
> >
> > =pod
> >
> > merge($pairings) takes a list of pairs, each pair indicates the
> > sameness
> > of the two indexes. Returns a partitioned list of same indexes.
> >
> > For example, if the input is
> > merge( [ [1,2], [2,4], [5,6] ] );
> >
> > that means 1 and 2 are the same. 2 and 4 are the same. Therefore
> > 1==2==4. The result returned is
> >
> > [[4,2,1],[6,5]];
> >
> > (ordering of the returned list and sublists are not specified.)
> >
> > =cut
>
> in Python:
>
>     def merge(pairings):
>         rev = {}
>         res = []
>         for pairing in pairings:
>             first, second = pairing
>             has_first = first in rev
>             has_second = second in rev
Not robust in the face of input like:
[[1,1]]
or
[[1,2], [1,2]]
or
[[1,2], [2,1]]
or
[[1,2], [2,3], [3,1]]

needs "if first == second: continue" here

>             if has_first and has_second:

needs "if rev[first] == rev[second]: continue" here

>                 rev[first].extend(rev[second])
>                 rev[second][:] = []
>                 rev[second] = rev[first]
>             elif has_first:
>                 rev[first].append(second)
>                 rev[second] = rev[first]
>             elif has_second:
>                 rev[second].append(first)
>                 rev[first] = rev[second]
>             else:
>                 copy = [first, second]
>                 res.append(copy)

My reaction to the "magic" by which res grows was "omigod that's the
most horrible thing I've seen for quite a while" but there was worse to
come :-)

>                 rev[first] = rev[second] = copy
>         return filter(None, res)
>
> and in Perl:
>
[snip]

>
> Both versions are (IMHO) pretty clear (when the docstring/pod is
> included), and O(n) because dict/hash lookup and list
> appending/pushing is O(1) in both languages. Both versions can
> probably be tweaked for speed quite a bit, but I don't *think*
there's
> a better-than-O(n) algorithm for this.

List appending is O(1) only in the amortised sense. Extending is not
O(1) in any sense. Neither is the list comparison that is necessary for
robustness (using your data structure, that is).

You don't need to think. This problem has been extensively picked over
by folk who are a lot smarter than us, starting from 30 years ago.
Google for "disjoint set" and "union-find". One gets the impression
that the best possible algorithm would be slightly *worse* than O(n).

>
> Note that the Python version assumes that the pairs' elements are
> hashable; your example used numbers, so I thought it was pretty safe
> assumption. The Perl version has no such restriction.

In the real world, the objects under comparison (images, fingerprints,
customer records, etc) may not themselves be hashable and comparison
for equality may be expensive but a unique identifier would be assigned
to each object and that ID would of course be cheaply hashable and
comparable.



From ray at rgibbon.freeserve.co.uk  Thu Feb 10 00:38:54 2005
From: ray at rgibbon.freeserve.co.uk (Ray Gibbon)
Date: Thu, 10 Feb 2005 05:38:54 -0000
Subject: Testing conditions.
Message-ID: <cues7q$mg7$1@news7.svr.pol.co.uk>

Testing conditions.

Common scenario.  Old programmer, new to Python, love it, but still
hankering after some of my old ways.

Of all of it's 'new to me' features, I appear to be enjoying 'no
declarations' and mixing types with abandon.  In particular I find myself
writing functions which return whatever might be useful in whatever type
seems appropriate, I'm really attracted to this, it works like magic.

BUT, every time the result of a fuction hits a 'while' or 'if' the magic
stops.  If I want the result and I want to test it I have to do an
assignment and test separately.  It grates every time I come across this,
and it seems obvious what I'm hankering for.

I *know* this has been gone over and over and over...
This is NOT another request for statements to be accepted as expressions for
two reasons:-
1. I've seen enough arguments on the subject where I've found myself firmly
on the anti change side.
2. I now realise that it might scratch the itch, but it would not cure it.

e.g. 1
|    while new_data = get_more_data(source):
|        process_data(new_data)

is obviously the sort of thing I'm missing, but it is not a general solution
because :-

e.g. 2
|    while new_data, environment = get_more_data(source):
|        process_data(new_data, environment)

is something I'm equally likely to want to do, but I can't express it's
meaning.

Before I resign myself to the inevitable, 'that's the way it is - get used
to it', I'd just like to scratch it once.  But, before I try walking on very
thin ice, I want to ask whether there are expectations of some future
changes which address these issues?

I note PEP 3000 is silent on this matter, and PEP 315, though related, is
not relevant.

Ray.




From fredrik at pythonware.com  Thu Feb 17 02:45:00 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 17 Feb 2005 08:45:00 +0100
Subject: Font size
References: <42126822@news.comindico.com.au><ldzqyx6byqdw$.wt8smryc0t3.dlg@40tude.net><42129ea1@news.comindico.com.au>
	<4213e033$1@news.comindico.com.au>
Message-ID: <cv1hs2$dhs$1@sea.gmane.org>

"Adam" <adam at eden.com> wrote:

> So we came up with the idea of using a random  number generator to
> generate numbers from 0 to 36 and display them in large figures on my
> laptop. This is for the benefit of those people who are hard of hearing.
> They like to see what is happening.

here's one way to do this:

from Tkinter import *
from random import randint
from time import sleep

def update(event=None):
  for i in range(10):
    label.config(text=str(randint(0,36)))
    label.update()
    sleep(0.05)

# create a maximized window
root = Tk()
root.wm_state("zoomed")
root.title("my roulette wheel")

# 80% of the screen height
height = int(root.winfo_screenheight() * 0.8)

# create label (use negative font size for size in pixels)
label = Label(root, font="Arial " + str(-height), bg="gold")
label.pack(fill=BOTH, expand=1)

 # click anywhere in window to pick a new number
root.bind("<Button-1>", update)

update() # display first number

mainloop()

(tweak as necessary)

</F> 





From caleb1 at telkomsa.net  Sun Feb  6 23:10:21 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Sun, 06 Feb 2005 23:10:21 -0500
Subject: Multiple constructors
References: <6SjNd.38337$K7.21639@fe2.news.blueyonder.co.uk>
	<AinNd.38406$K7.14757@fe2.news.blueyonder.co.uk>
Message-ID: <opsls67jst1js0xs@news.telkomsa.net>

Hi Philip

> C++ to Python is a steep 'unlearning' curve...

That's worthy of QOTW.  I decided not to reply to this thread earlier, but  
you just convinced me otherwise :)

I work in Delphi a lot, which is in a lot of respects very similar to C.   
I have come to the conclusion that function overloading was introduced to  
allow the same calling syntax and even functionality to be applied to  
different *types*.  This is a consequence of the fact that in Delphi and  
C, for example, typing is static.

In a dynamic language like python, however, overloading isn't necessary.   
Not only can the *type* of a function argument be determined at run-time,  
the *number* of arguments can as well.

Though Alex indicated differently earlier, I intend to always use an "if"  
statment inside one constructor to initialise any class in the situation  
where the arguments may be different in number and type.  I don't have the  
years of experience that Alex has, however, so I may end up regretting it  
but right now, it seems to me to be the clearest approach in this  
situation.

thx
Caleb


From newsgroups at jhrothjr.com  Wed Feb 23 13:48:54 2005
From: newsgroups at jhrothjr.com (John Roth)
Date: Wed, 23 Feb 2005 12:48:54 -0600
Subject: PyEphem on Win32 -- 2nd try
References: <mailman.2972.1109178865.22381.python-list@python.org>
Message-ID: <111pk2f31bcln61@news.supernews.com>

A quick look at the site, and following the link to
the XEphem site reveals that the Windows port
of XEphem uses Cygwin. AFAIK, that's not
compatible with the usual CPython implementation.

Again, AFAIK, you'll either have to use a Python
port compiled under Cygwin, or you'll have to
find a Windows port compiled with VS 6 or
higher.

Someone who knows more about those
issues will have to take it from here.

John Roth


<Flory at fdu.edu> wrote in message 
news:mailman.2972.1109178865.22381.python-list at python.org...
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> A second request for help...
>
> Has anyone run the PyEphem ephemeris application under WinXP?
> http://rhodesmill.org/brandon/projects/pyephem.html
> I have compiled it with Visual Studio 6 and it crashes Python with a
> simple
>
>>>> import ephem
>>>> ephem.date('1994/7/16')
>
> Identical code works fine under Linux. I suspect that the problem has
> to do with a parser built into the c shell for the c code that the
> app wraps around.  However, I am not good enough at c to spot the
> error.
>
> I am running ActivePython 2.3.5 Build 236 on a WinXP SP2 system with
> Visual Studio 6 patched to sp6.
>
> I would appreciate either help from a c guru who knows how to wrap
> python around c or a pointer to another list where experts might
> reside.
> - -------------------------------------------
> Cheers, David Flory
>
> -----BEGIN PGP SIGNATURE-----
> Version: PGP 8.1
>
> iQA/AwUBQhy551e2/rcN3lp8EQIu2gCfRyDmSCtiP4uB2qKMtIvjcOOsNUkAn1FD
> rir+BKqfDqZ0P+lKcwfgdQPu
> =5+at
> -----END PGP SIGNATURE-----
> 



From eurleif at ecritters.biz  Thu Feb 17 07:46:00 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Thu, 17 Feb 2005 07:46:00 -0500
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <37hippF4gcimiU1@individual.net>
References: <37hippF4gcimiU1@individual.net>
Message-ID: <37jht7F5emcioU1@individual.net>

Leo Breebaart wrote:
> What I can't find an explanation for is why str.join() doesn't
> automatically call str() on its arguments

I don't really like that idea for the reasons others have stated. But a 
related and (IMHO) more Pythonic idea would be to allow arbitrary 
objects to be str.join()ed if they use __radd__ to allow concatenation 
with strings. This would be consistent with how the + operator behaves:

Python 2.4 (#2, Jan  8 2005, 20:18:03)
[GCC 3.3.5 (Debian 1:3.3.5-5)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> class Foo(object):
...     def __radd__(self, other):
...         if isinstance(other, basestring):
...             return other + str(self)
...     def __str__(self):
...         return 'Foo()'
...
 >>> 'foo:' + Foo()
'foo:Foo()'
 >>> ''.join(['foo', Foo()])
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: sequence item 1: expected string, Foo found


From noreply at python.org  Tue Feb 22 07:48:38 2005
From: noreply at python.org (The Post Office)
Date: Tue, 22 Feb 2005 15:48:38 +0300
Subject: Delivery reports about your e-mail
Message-ID: <20050222105637.5921C1E4003@bag.python.org>

Your message was undeliverable due to the following reason:

Your message was not delivered because the destination server was
not reachable within the allowed queue period. The amount of time
a message is queued before it is returned depends on local configura-
tion parameters.

Most likely there is a network problem that prevented delivery, but
it is also possible that the computer is turned off, or does not
have a mail system running right now.

Your message was not delivered within 8 days:
Host 138.95.127.173 is not responding.

The following recipients could not receive this message:
<python-list at python.org>

Please reply to postmaster at python.org
if you feel this message to be in error.


From deetsNOSPAM at web.de  Sun Feb 20 16:30:50 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sun, 20 Feb 2005 22:30:50 +0100
Subject: Moving to Python from PHP - 3 questions
References: <mailman.2873.1108931203.22381.python-list@python.org>
	<cvat62$9h0$05$1@news.t-online.com>
	<mailman.2875.1108933444.22381.python-list@python.org>
Message-ID: <cvavi6$aif$01$1@news.t-online.com>

> Thank you. My impression of Zope in the past has been that it does what
> I need, along with 10,000 other things I don't (built in WebDAV
> server?!), but clearly I owe it another chance. I've been initially

The apache has a built in webdav server too - is that a reason _not_ to use
it? If you don't want a feature, don't use it. You can turn them off, btw. 

But what you might not be aware of is that zope does not store its
templates, scripts and files in general in the filesystem as php does, but
as objects in the zodb database. So webdav and ftp are other views to that
objects that allow you to load and save these files using "normal" editors
and tools, not only the web-interface of zope. The advantage of this
approach is that versioning of content - regardless of it's type - is
built-in. Can be a life-saver sometimes :)

> attracted to mod_python because of its raw simplicity and its apparent
> similarity to mod_php and mod_perl, which I am familiar with. 

It certainly is the most simple way to create dynamic content. But there is
a big difference between python and php: php started as a web-developers
tool, and it's features are a direct consequence of that. python oth is a
general purpose programming language - it is certainly suited for web
development, but not limited to. There are people who also want to use php
as general purpose programming language - but nevertheless, its design has
been influenced by its main purpose. So you e.g. get session state handling
"for free"  - as more or less _all_ web-apps today need them.


-- 
Regards,

Diez B. Roggisch


From jalemkul at vt.edu  Tue Feb  1 17:51:14 2005
From: jalemkul at vt.edu (Justin Lemkul)
Date: Tue, 1 Feb 2005 17:51:14 -0500
Subject: Atlas and NumPy Problems
Message-ID: <421E79FA@zathras>

Hello all,

I am hoping someone out there will be able to help me.  I am trying to install 
a program that utilizes NumPy.  In installing NumPy, I realized that I was 
lacking Atlas.  I ran into the following problems installing Atlas and NumPy, 
as I realized that NumPy could be installed using the Mac OSX veclib already 
built in.  If anyone has any ideas on how to fix either of these, I would be 
most grateful.

I am fairly new to Python (I've been learning it myself), so I apologize if 
these questions are a bit foolish.  I've been fighting these problems for 
days, and I'm out of ideas.

I am running OS X v10.3, gcc v3.3, Python v2.3, ScientificPython v2.4.3, and 
am attempting to install NumPy 23.7

Thank you!

-Justin


ATLAS install problem:

n file included from
/Users/jalemkul/Desktop/ATLAS/include/
atlas_prefetch.h:8,                 from
../ATL_col2blk.c:33:/Users/jalemkul/Desktop/ATLAS/
include/atlas_altivec.h:6:27: altivec.h: No such file or
directory../ATL_col2blk.c: In function
`ATL_dcol2blk_aX':../ATL_col2blk.c:79: error: `vector' undeclared (first use
in this
function)../ATL_col2blk.c:79: error: (Each undeclared identifier is reported
only once../
ATL_col2blk.c:79: error: for each function it appears in.)../ATL_col2blk.c:79:
error: parse
error before "float"../ATL_col2blk.c:80: error: parse error before
"float"make[7]: ***
[ATL_dcol2blk_aX.o] Error 1make[7]: *** Waiting for unfinished
jobs....make[6]: *** [dlib]
Error 2make[5]: *** [dmmlib] 
Error 2make[4]: *** [res/atlas_cacheedge.h] 
Error2make[3]: *** [dinstall] 
Error 2make[2]: *** [MMinstall] 
Error 2   STAGE2-1-2: CacheEdge
DETECTIONmake -f Makefile INSTALL_LOG/atlas_cacheedge.h pre=d 2>&1 |
./xatlas_tee
INSTALL_LOG/dMMCACHEEDGE.LOGcd /Users/jalemkul/Desktop/ATLAS/tune/blas/gemm/
OSX_UNKNOWNAltiVec_2 ; make res/atlas_cacheedge.h pre=dmake dRunFindCEcd
/Users/
jalemkul/Desktop/ATLAS/src/blas/gemm/OSX_UNKNOWNAltiVec_2 ; make dlibmake
auxillib
dcleanuplib dusergemmcd /Users/jalemkul/Desktop/ATLAS/src/auxil/
OSX_UNKNOWNAltiVec_2 ; make libmake[7]: Nothing to be done for `lib'.cd KERNEL
; make
-f dMakefile dlibmake[7]: Nothing to be done for `dlib'.cd
/Users/jalemkul/Desktop/ATLAS/
src/blas/gemm/OSX_UNKNOWNAltiVec_2 ; make dusermmmake[7]: `dusermm' is up to
date.make -j 2 dlib.grd/usr/bin//gcc -o ATL_dcol2blk_aX.o -c -DL2SIZE=4194304
-I/Users/
jalemkul/Desktop/ATLAS/include -I/Users/jalemkul/Desktop/ATLAS/include/
OSX_UNKNOWNAltiVec_2 -I/Users/jalemkul/Desktop/ATLAS/include/contrib
-DATL_OS_OSX -DATL_AltiVec -DATL_AVgcc -DATL_AS_OSX_PPC -DATL_NCPU=2 -O
-maltivec -mabi=altivec -DDREAL -DALPHAX ../ATL_col2blk.c
/usr/bin//gcc -o ATL_drow2blkT_aX.o -c -DL2SIZE=4194304
-I/Users/jalemkul/Desktop/
ATLAS/include -I/Users/jalemkul/Desktop/ATLAS/include/OSX_UNKNOWNAltiVec_2
-I/Users/
jalemkul/Desktop/ATLAS/include/contrib   -DATL_OS_OSX -DATL_AltiVec
-DATL_AVgcc
-DATL_AS_OSX_PPC -DATL_NCPU=2 -O -maltivec -mabi=altivec -DDREAL -DALPHAX ../
ATL_row2blkT.c
In file included from
/Users/jalemkul/Desktop/ATLAS/include/atlas_prefetch.h:8,
                 from ../ATL_row2blkT.c:32:
/Users/jalemkul/Desktop/ATLAS/include/atlas_altivec.h:6:27: altivec.h: No such
file or
directory
../ATL_row2blkT.c: In function `ATL_drow2blkT_NB_aX':
../ATL_row2blkT.c:64: error: `vector' undeclared (first use in this function)
../ATL_row2blkT.c:64: error: (Each undeclared identifier is reported only once
../ATL_row2blkT.c:64: error: for each function it appears in.)
../ATL_row2blkT.c:64: error: parse error before "float"
../ATL_row2blkT.c:65: error: parse error before "float"
../ATL_row2blkT.c:74: error: parse error before "float"
../ATL_row2blkT.c:75: error: parse error before "float"
In file included from
/Users/jalemkul/Desktop/ATLAS/include/atlas_prefetch.h:8,
                 from ../ATL_col2blk.c:33:
/Users/jalemkul/Desktop/ATLAS/include/atlas_altivec.h:6:27: altivec.h: No such
file or
directory
../ATL_col2blk.c: In function `ATL_dcol2blk_aX':
../ATL_col2blk.c:79: error: `vector' undeclared (first use in this function)
make[6]: *** [ATL_drow2blkT_aX.o] Error 1
make[6]: *** Waiting for unfinished jobs....
../ATL_col2blk.c:79: error: (Each undeclared identifier is reported only once
../ATL_col2blk.c:79: error: for each function it appears in.)
../ATL_col2blk.c:79: error: parse error before "float"
../ATL_col2blk.c:80: error: parse error before "float"
make[6]: *** [ATL_dcol2blk_aX.o] Error 1
make[5]: *** [dlib] Error 2
make[4]: *** [dmmlib] Error 2
make[3]: *** [res/atlas_cacheedge.h] Error 2
make[2]: ***
[/Users/jalemkul/Desktop/ATLAS/tune/blas/gemm/OSX_UNKNOWNAltiVec_2/
res/atlas_cachedge.h] Error 2
ERROR 572 DURING CACHE EDGE DETECTION!!.
cd ../.. ; make error_report arch=OSX_UNKNOWNAltiVec_2
make -f Make.top error_report arch=OSX_UNKNOWNAltiVec_2
uname -a 2>&1 >> bin/OSX_UNKNOWNAltiVec_2/INSTALL_LOG/ERROR.LOG
/usr/bin//gcc -v 2>&1  >> bin/OSX_UNKNOWNAltiVec_2/INSTALL_LOG/ERROR.LOG
Reading specs from /usr/libexec/gcc/darwin/ppc/3.3/specs
Thread model: posix
gcc version 3.3 20030304 (Apple Computer, Inc. build 1495)
/usr/bin//gcc -V 2>&1  >> bin/OSX_UNKNOWNAltiVec_2/INSTALL_LOG/ERROR.LOG
gcc: `-V' option must have argument
make[4]: [error_report] Error 1 (ignored)
/usr/bin//gcc --version 2>&1  >>
bin/OSX_UNKNOWNAltiVec_2/INSTALL_LOG/ERROR.LOG
/usr/bin//tar  cf error_OSX_UNKNOWNAltiVec_2.tar Make.OSX_UNKNOWNAltiVec_2
bin/
OSX_UNKNOWNAltiVec_2/INSTALL_LOG/*
/usr/bin//gzip  --best error_OSX_UNKNOWNAltiVec_2.tar
mv error_OSX_UNKNOWNAltiVec_2.tar.gz error_OSX_UNKNOWNAltiVec_2.tgz
Error report error_<ARCH>.tgz has been created in your top-level ATLAS
directory.  Be sure to include this file in any help request.


First, make sure this error is not covered in the ATLAS errata file,
   http://math-atlas.sourceforge.net/errata.html
All known errors, and most common mistakes/system problems are documented
in this file, so it will save everyone hassle in the long run if you take
the time to scope it out before sending e-mail to the help list.

If this does not have the solution to your problem, and you can't figure out
what went wrong, submit a support request to the ATLAS support tracker, as
discussed here:
   http://math-atlas.sourceforge.net/faq.html#help

In the above examples, <ARCH> should be replaced with your architecture
string, such as "Linux_PIII" or "FreeBSD_21264".

make[1]: *** [install] Error 255
make: *** [install] Error 2


NumPy install problem:

warning: no library file corresponding to '/System/Library' found (skipping)
gcc -Wl,-F. -Wl,-F. -bundle -framework Python
build/temp.darwin-7.7.0-Power_Macintosh
-2.3/Packages/dotblas/dotblas/_dotblas.o -L/System/Library -o
build/lib.darwin-7.7.0-
Power_Macintosh-2.3/_dotblas.so
ld: Undefined symbols:
_cblas_caxpy
_cblas_cdotc_sub
_cblas_cdotu_sub
_cblas_cgemm
_cblas_cgemv
_cblas_daxpy
_cblas_ddot
_cblas_dgemm
_cblas_dgemv
_cblas_saxpy
_cblas_sdot
_cblas_sgemm
_cblas_sgemv
_cblas_zaxpy
_cblas_zdotc_sub
_cblas_zdotu_sub
_cblas_zgemm
_cblas_zgemv
error: command 'gcc' failed with exit status 1



From jao at geophile.com  Thu Feb 24 22:18:37 2005
From: jao at geophile.com (Jack Orenstein)
Date: Thu, 24 Feb 2005 22:18:37 -0500
Subject: Threading and consuming output from processes
In-Reply-To: <YBwTd.38471$H05.20645@twister.nyroc.rr.com>
References: <1109278779.955986.193860@z14g2000cwz.googlegroups.com>	<1109283053.971905.27670@z14g2000cwz.googlegroups.com>	<1109295016.597170.21350@o13g2000cwo.googlegroups.com>
	<YBwTd.38471$H05.20645@twister.nyroc.rr.com>
Message-ID: <421E990D.9070608@geophile.com>

I am developing a Python program that submits a command to each node
of a cluster and consumes the stdout and stderr from each. I want all
the processes to run in parallel, so I start a thread for each
node. There could be a lot of output from a node, so I have a thread
reading each stream, for a total of three threads per node. (I could
probably reduce to two threads per node by having the process thread
handle stdout or stderr.)

I've developed some code and have run into problems using the
threading module, and have questions at various levels of detail.

1) How should I solve this problem? I'm an experienced Java programmer
but new to Python, so my solution looks very Java-like (hence the use of
the threading module). Any advice on the right way to approach the
problem in Python would be useful.

2) How many active Python threads is it reasonable to have at one
time? Our clusters have up to 50 nodes -- is 100-150 threads known to
work? (I'm using Python 2.2.2 on RedHat 9.)

3) I've run into a number of problems with the threading module. My
program seems to work about 90% of the time. The remaining 10%, it
looks like notify or notifyAll don't wake up waiting threads; or I
find some other problem that makes me wonder about the stability of
the threading module. I can post details on the problems I'm seeing,
but I thought it would be good to get general feedback
first. (Googling doesn't turn up any signs of trouble.)

Thanks.

Jack Orenstein



From tom at dtsam.com  Wed Feb  9 10:14:13 2005
From: tom at dtsam.com (Thomas Bartkus)
Date: Wed, 9 Feb 2005 09:14:13 -0600
Subject: Performance Issues of MySQL with Python
References: <1107954472.246556.258030@g14g2000cwa.googlegroups.com>
Message-ID: <6dSdnTh0iusJtZffRVn-gQ@telcove.net>

"sandy" <sandeep.sandy at gmail.com> wrote in message
news:1107954472.246556.258030 at g14g2000cwa.googlegroups.com...
> Hi All,
>
> I am a newbie to MySQL and Python. At the first place, I would like to
> know what are the general performance issues (if any) of using MySQL
> with Python.
>
> By performance, I wanted to know how will the speed be, what is the
> memory overhead involved, etc during database specific operations
> (retrieval, update, insert, etc) when MySQL is used with Python.
>
> Any solutions to overcome these issues (again, if any)?

There are no "general performance issues" with respect to "using MySQL with
Python".

The use of Python as a programming front end does not impact the performance
of whatever database server you might select.  The choice of MySQL as your
database server does not impact the effectiveness of whatever front end
programming language you select. The 2 functions, database server and
programming language, do not interact in ways that raise unique performance
issues.

You can choose each one without worrying about the other. They two quite
separate design choices.

Thomas Bartkus




From kent37 at tds.net  Fri Feb 11 08:44:19 2005
From: kent37 at tds.net (Kent Johnson)
Date: Fri, 11 Feb 2005 08:44:19 -0500
Subject: Is this a bug? BOM decoded with UTF8
In-Reply-To: <373p8vF57039vU1@individual.net>
References: <epMOd.357$7m.215@read3.inet.fi>
	<420bc317$0$4925$9b622d9e@news.freenet.de>
	<KT1Pd.641$gz1.258@read3.inet.fi> <373p8vF57039vU1@individual.net>
Message-ID: <420cb3d6$1_2@newspeer2.tds.net>

Diez B. Roggisch wrote:
>>I know its easy (string.replace()) but why does UTF-16 do
>>it on its own then? Is that according to Unicode standard or just
>>Python convention?
> 
> 
> BOM is microsoft-proprietary crap. 

Uh, no. BOM is part of the Unicode standard. The intent is to allow consumers of Unicode text files 
to disambiguate UTF-8, big-endian UTF-16 and little-endian UTF-16.
See http://www.unicode.org/faq/utf_bom.html#BOM

Kent


From shoot at the.moon  Wed Feb  9 18:30:13 2005
From: shoot at the.moon (Steve Horsley)
Date: Wed, 09 Feb 2005 23:30:13 +0000
Subject: Is Python as capable as Perl for sysadmin work?
In-Reply-To: <mailman.2204.1107885796.22381.python-list@python.org>
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
	<mailman.2204.1107885796.22381.python-list@python.org>
Message-ID: <cue6d5$vn6$1@news.freedom2surf.net>

Jeff Epler wrote:
>   If I want to beg my computer to run programs, I know
> where to find Intercal with its "PLEASE" and "DO PLEASE" constructions.
> 
Was it INTERCAL that had the COMEFROM <Line number> statement instead of
GOTO? I REALLY like the idea of a COMEFROM statement. I think python should
have a COMEFROM statement, but since perl revels in being impenetrable, I
suppose perl is likely to get it first. Shame.

Steve


From bvdeenen at access-four-all.nl.invalid  Mon Feb 21 05:38:23 2005
From: bvdeenen at access-four-all.nl.invalid (Bart)
Date: Mon, 21 Feb 2005 11:38:23 +0100
Subject: Don't understand global variables between modules
Message-ID: <4219ba1f$0$162$e4fe514c@dreader14.news.xs4all.nl>

Hi all

I don't understand globals between multiple modules in a python program. I
really don't. I've narrowed it down to the following two very simple
programs a.py and b.py. When I run a.py I get the following output:

inc:  2
A:  2
inc:  3
B:  3
C:  1
I don't understand the last line at all. Why is my x variable 1 after having
been incremented twice? Is there more than one global space? Is this
backreference to the original a.py not allowed?

I could use some help.

Thanks

Bart van Deenen



a.py:
---------------------------------
import b
x=1

def inc():
    global x
    x+=1
    print "inc: ",x

if __name__=="__main__":
    b.test()
    print "C: ",x

b.py:
---------------------------------
def test():
    import a
    a.inc()
    print "A: ",a.x
    a.inc()
    print "B: ",a.x



From simoninusa2001 at yahoo.co.uk  Sat Feb 19 14:04:24 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 19 Feb 2005 11:04:24 -0800
Subject: Pausing a program - poll/sleep/threads?
References: <1108625477.222091.34680@l41g2000cwc.googlegroups.com>
	<1119nf8qqj5gfbe@corp.supernews.com>
	<1108666816.520517.91390@o13g2000cwo.googlegroups.com>
	<1119v7o1h4k8be5@corp.supernews.com>
	<1108699641.787642.310960@f14g2000cwb.googlegroups.com>
Message-ID: <1108839864.101293.184050@o13g2000cwo.googlegroups.com>

OK, I've implemented the 2sec threaded update, but I'm having some
problems with it.

Basically the thread will have to just run constantly, never exiting
(just sleeping for 2secs), which seems to work OK except when I try to
get the thread to do anything with the main program's window.

As the thread doesn't end, it doesn't return a result, so on every pass
of the thread's while loop, I write the current track info to the
mainWindow directly, however this causes the program to hang. Here is a
snippet of the current method:

class ThreadedInfo(Thread):
    """overloads init and defines run"""
    def __init__(self):
        Thread.__init__(self)

    def run(self):
        # runs the whole time
        while 1:
            self.info()
            time.sleep(2)

    def info(self):
        """referencing window kills linux here"""

        # get track info, returned as dictionary
        self.info_dict = backend.getInfo(config.server, config.port)

I was thinking of getting the thread to just run once, then getting the
main program to write the result (using join() ) to the mainWindow.
That method would be something like this, but it's almost totally
pointless using a thread then, as the while loop will singletask the
program:

while 1:
    # start thread
    self.infothread.start()

    # when thread ends, get result
    self.result = self.infothread.join()

    # write result to window
    window.mainTextarea.setText(self.result)

    # pause for 2secs before starting again
    sleep(2)

I made sure that I built PyQt using threads, so that's not the issue.
Any other ideas?



From dave.opstad at monotypeimaging.com  Tue Feb  1 18:35:18 2005
From: dave.opstad at monotypeimaging.com (Dave Opstad)
Date: Tue, 01 Feb 2005 15:35:18 -0800
Subject: Awkwardness of C API for making tuples
References: <dave.opstad-E4D4C4.07281701022005@reader0900.news.uu.net>
	<1107289261.185768.116790@f14g2000cwb.googlegroups.com>
Message-ID: <dave.opstad-A95B15.15351801022005@reader0900.news.uu.net>

In article <1107289261.185768.116790 at f14g2000cwb.googlegroups.com>,
 "John Machin" <sjmachin at lexicon.net> wrote:

> What is the purpose of this first loop?

Error handling. If I can't successfully create all the PyInts then I can 
dispose the ones I've made and not bother making the tuple at all.
> 
> In what variable-length storage are you storing these (Python) integers
> during this first loop? Something you created with (a) PyMem_Malloc (b)
> malloc (c) alloca (d) your_own_malloc?

(b) malloc. The sequence here is: 1) malloc; 2) check for malloc 
success; 3) loop to create PyInts (if failure, Py_DECREF those made so 
far and free the malloc'ed buffer); 4) create new tuple (error checks 
again); and 5) PyTuple_SET_ITEM (no error checks needed)

> 1. Determine the length of the required tuple; this may need a loop,
> but only to _count_ the number of C longs that you have.
> 2. Use PyTuple_New.
> 3. Loop to fill the tuple, using PyInt_FromLong and PyTuple_SetItem.

This would certainly be simpler, although I'm not sure I'm as clear as 
to what happens if, say, in the middle of this loop a PyInt_FromLong 
fails. I know that PyTuple_SetItem steals the reference; does that mean 
I could just Py_DECREF the tuple and all the pieces will be 
automagically freed? If so, I'll take your recommendation and rework the 
logic this way.

Thanks!
Dave


From christopher_culver at yahoo.com  Mon Feb 14 00:52:47 2005
From: christopher_culver at yahoo.com (Christopher Culver)
Date: 13 Feb 2005 21:52:47 -0800
Subject: FS: O'Reilly Python Pocket Reference
Message-ID: <1108360367.579794.122150@g14g2000cwa.googlegroups.com>

I am offering for sale a copy of O'Reilly's _Python Pocket Reference_.
It is the second edition, covering Python 2. It is in fine condition,
with no broken spine or dog-earned pages. One might even believe it
just came out of the bookstore. Asking price is US$4 plus shipping
(USPS Media Mail within the US, airmail internationally), payable by
check or money order in the US, or Paypal elsewhere.

Christopher Culver
christopher_culver at yahoo.com



From franz.steinhaeusler at utanet.at  Sat Feb 19 11:05:41 2005
From: franz.steinhaeusler at utanet.at (Franz Steinhäusler)
Date: Sat, 19 Feb 2005 17:05:41 +0100
Subject: [ANN] Python 2.4 Quick Reference available
References: <cv79sj$mgk$1@aphrodite.grec.isp.9tel.net>
Message-ID: <0roe11d8engklsoto03jh2171k60g43vo7@4ax.com>

On Sat, 19 Feb 2005 13:00:59 +0100, "Richard Gruet"
<rjgruet at yahoo.com> wrote:

>Hi Pythoners,
>
>An updated version of the Python Quick Reference is available for Python 2.4
>at http://rgruet.free.fr/#QuickRef.
>It is a single looonnng html page (30 printed A4 pages) with a choice of 4
>different CSS styles; also available in PDF.
>
>Richard
>

Hello Richard,

many thanks!

Such a coincidence, because I wanted to ask these
days, wheter a newer one exist (I have a printed reference for Python
1.5.1)



-- 
Franz Steinh?usler

DrPython (Project Developer) 
http://mitglied.lycos.de/drpython/


From simoninusa2001 at yahoo.co.uk  Thu Feb 17 00:51:43 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 16 Feb 2005 21:51:43 -0800
Subject: Help with C extensions under VC6 / WinXP and Python 2.4
In-Reply-To: <mailman.2732.1108608361.22381.python-list@python.org>
References: <mailman.2731.1108605453.22381.python-list@python.org>
	<s30811dnlp51u3t1td3s6q0efp7b3m2ma0@4ax.com>
	<mailman.2732.1108608361.22381.python-list@python.org>
Message-ID: <1108619503.324262.282330@c13g2000cwb.googlegroups.com>

What's the difference between ctypes, SWIG and SIP?

I've used SWIG to "convert" C source to Python (as I believe SIP
does?), so does ctypes wrap functions from binaries (e.g. DLL's)?



From pltrry at yahoo.com  Sun Feb  6 18:23:17 2005
From: pltrry at yahoo.com (Paul Terry)
Date: Sun, 6 Feb 2005 15:23:17 -0800 (PST)
Subject: email extraction program
Message-ID: <20050206232317.97390.qmail@web30108.mail.mud.yahoo.com>

Good day,
Can you help me create an ebay email extraction program ?
I have some ebay scripts which worked and extracted emails from ebay.com but these days don't work.
Regards.

		
---------------------------------
Do you Yahoo!?
 Yahoo! Search presents - Jib Jab's 'Second Term'
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From abuse at solumslekt.org  Thu Feb 17 04:13:26 2005
From: abuse at solumslekt.org (Leif B. Kristensen)
Date: Thu, 17 Feb 2005 10:13:26 +0100
Subject: [newbie]How to install python under DOS and is there any
	Wxpython can be installed under dos?
References: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
	<mailman.2685.1108553200.22381.python-list@python.org>
	<b9-dnTUOwoYK647fRVn-2Q@rogers.com>
Message-ID: <WeZQd.9284$IW4.222365@news2.e.nsc.no>

john san skrev:

> pure DOS, old pc, used for teaching . want show some "windows" under
> DOS (under Python).

curses is a text-based interface that will let you build windowed
applications like you could with the crt unit in Turbo Pascal of those
golden days. I've no idea if anyone's compiled it for the 16-bits DOS
platform, though.
-- 
Leif Biberg Kristensen


From pipedreamergrey at gmail.com  Tue Feb 22 16:43:48 2005
From: pipedreamergrey at gmail.com (PipedreamerGrey)
Date: 22 Feb 2005 13:43:48 -0800
Subject: PythonCard and Py2Exe
Message-ID: <1109108628.859879.121020@g14g2000cwa.googlegroups.com>

I'm trying to create a standalone version (.exe) of PythonCard's Custdb
sample using Py2Exe version 0.5.0.  Everytime I attempt to compile the
program, I get an error during compilation.  This is the exact code I'm
using in the setup file:

from distutils.core import setup
import py2exe
setup( name = "custdb",
       console = ["custdb.py"],
       data_files = [ (".", ["custdb.ini", "custdb.de.rsrc.py",
"custdb.rsrc.py", "customerdata.csv"]) ]
       )

This is the error message I get when I run custdb.exe:

Traceback (most recent call last):
  File "custdb.py", line 202, in ?
    app = model.Application(CustDbStack)
  File "PythonCard\model.pyc", line 337, in __init__
  File "PythonCard\resource.pyc", line 48, in getResource
  File "PythonCard\resource.pyc", line 86, in __init__
  File "PythonCard\resource.pyc", line 91, in __init__
  File "PythonCard\resource.pyc", line 91, in __init__
  File "PythonCard\resource.pyc", line 96, in __init__
  File "PythonCard\resource.pyc", line 139, in enforceSpec
  File "PythonCard\resource.pyc", line 30, in loadComponentModule
ImportError: cannot import module 'radiogroup

When I add "radiogroup" to the imports at the top of custdb.py, I get
this error message:

Traceback (most recent call last):
  File "custdb.py", line 18, in ?
ImportError: cannot import name radiogroup

This is line 18 in Custdb.py: from PythonCard import dialog, model,
radiogroup



From ajsiegel at optonline.com  Tue Feb  1 08:06:52 2005
From: ajsiegel at optonline.com (Arthur)
Date: Tue, 01 Feb 2005 08:06:52 -0500
Subject: Go visit Xah Lee's home page
References: <opslhry3yp6yt6e7@news.cisco.com>
Message-ID: <pjvuv09lbb1pj77sms455n959rp3jfjgio@4ax.com>

On Mon, 31 Jan 2005 16:07:41 -0800, aurora <aurora00 at gmail.com> wrote:

>Let's stop discussing about the perl-python non-sense. It is so boring.
>
>For a break, just visit Mr Xah Lee's personal page  
>(http://xahlee.org/PageTwo_dir/Personal_dir/xah.html). You'll find lot of  
>funny information and quotes from this queer personality. Thankfully no  
>perl-python stuff there.
>
>Don't miss Mr. Xah Lee's recent pictures at
>
>   http://xahlee.org/PageTwo_dir/Personal_dir/mi_pixra.html
>
>My favor is the last picture. Long haired Xah Lee sitting contemplatively  
>in the living room. The caption says "my beautiful hair, fails to resolve  
>the problems of humanity. And, it is falling apart by age."


And of each of us contributed something 50% as worthwhile as well
executed as his geometry pages to the Web, the Web would begin to
deliver 10% of its promise.

POST GET this ;)

Art


From duncan.booth at invalid.invalid  Tue Feb  8 04:43:02 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 8 Feb 2005 09:43:02 GMT
Subject: variable declaration
References: <1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4207fd24@fidonet.org>
	<UmSNd.104914$Jk5.59261@lakeread01>
	<mailman.2134.1107826605.22381.python-list@python.org>
Message-ID: <Xns95F762D66AECFduncanrcpcouk@127.0.0.1>

Brian van den Broek wrote:

> Can it then be further (truly :-) ) said that
> 
> if False:
>      # thousands of lines of code here
> 
> would effect the structure of the function object's bytecode, but not 
> its behaviour when run? Or, at most, would cause a performance effect 
> due to the bytecode being bloated by thousands of line's worth of code 
> that would never get executed?
> 

Yes, but that purely an implementation detail.

if 0:
   # thousands of lines of code here

has no effect at all on the bytecode, it it optimised out entirely. 'if 
False:' is not optimised out in Python 2.4 or earlier, but might be in 
later versions.

Now, to really get your brain hurting, see what this one does:

def hurts_my_brain(v):
    if 0:     # unlike Steve's eg, ensuring that the
        global x  # nested block is never hit at runtime
    x = v

I'll give you a clue, it's not the same as your:

def hurts_my_brain(v):
    if False:     # unlike Steve's eg, ensuring that the
        global x  # nested block is never hit at runtime
    x = v

So the global statement is a wart which isn't executed at runtime, but 
behaves differently when the bytecode it doesn't generate is optimised out.


From deetsNOSPAM at web.de  Fri Feb 18 16:05:49 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 18 Feb 2005 22:05:49 +0100
Subject: re.compile and very specific searches
References: <cv5ba4$nvn$1@solaris.cc.vt.edu>
	<cv5chc$k27$01$1@news.t-online.com>
	<1108759781.084277.64990@f14g2000cwb.googlegroups.com>
Message-ID: <cv5lbb$rcr$00$3@news.t-online.com>

> 
> This approach would actually work without the need for subsequent
> validation, if implemented properly. Not only as you noted does it let
> "259" through, but also it doesn't cover 2-digit numbers starting with
> 2. Assuming excess leading zeroes are illegal, the components required
> are:

Damn. Certainly not my glory regular expression day.

-- 
Regards,

Diez B. Roggisch


From apardon at forel.vub.ac.be  Mon Feb 28 05:19:46 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 28 Feb 2005 10:19:46 GMT
Subject: Why do descriptors (and thus properties) only work on
	attributes.
References: <slrnd25nve.d87.apardon@rcpc42.vub.ac.be>
	<7xoee5kpiv.fsf@ruckus.brouhaha.com>
	<slrnd25pj4.d87.apardon@rcpc42.vub.ac.be>
	<cvuqhc$e02$1@news.sap-ag.de>
Message-ID: <slrnd25s21.d87.apardon@rcpc42.vub.ac.be>

Op 2005-02-28, Daniel Dittmar schreef <daniel.dittmar at sap.corp>:
> Antoon Pardon wrote:
>>>>Can anyone explain why descriptors only work when they are an attribute
>>>>to an object or class.  I think a lot of interesting things one can
>>>>do with descriptors would be just as interesting if the object stood
>>>>on itself instead of being an attribute to an other object.
>>>
>>>How would that work?
>> 
>> 
>> Well AFAIU a descriptor is an object with at least one method out of
>> __get__, __set__ or __del__. I don see why implicitly calling one
>> of these methods would be any more difficult when they are autonomous
>> objects than when they are attributes.
>
> I guess properties are really a feature of the class, not of the 
> attribute. Certain operations on objects of the class (getattr, setattr, 
> delattr) have to be intercepted. If you want to have this for general 
> variable access, you 'd have to intercept all accesses to local and 
> module name spaces. This slows things down a lot.

OK, I can understand this.

> And many think that 
> overloading assignment is a bad idea.

But not bad enough to allow it in some cases?

> You probably find some dicussions 
> when searching for "overloading assignment" in the newsgroup archive.

I'll take a look.

> >>>to an object or class.  I think a lot of interesting things one can
>
> As in the chinese curse "May you live in interisting times"?

Well I think python partly makes the time interesting. So in that
respect we are all cursed.

-- 
Antoon Pardon


From steve at holdenweb.com  Wed Feb  2 08:03:49 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 02 Feb 2005 08:03:49 -0500
Subject: Is this a contradiction in the docs ?
In-Reply-To: <1107342032.273119.194120@o13g2000cwo.googlegroups.com>
References: <1107342032.273119.194120@o13g2000cwo.googlegroups.com>
Message-ID: <0i4Md.102585$Jk5.77392@lakeread01>

Fuzzyman wrote:

> The following two passages from the python documentation *appear* to
> contradict each other. Equally possible (or more likely !) is that I
> misunderstand it :
> 
> eval :
> This function can also be used to execute arbitrary code objects (such
> as those created by compile()). In this case pass a code object instead
> of a string. The code object must have been compiled passing 'eval' as
> the kind argument.
> 
> 
> compile:
> The kind argument specifies what kind of code must be compiled; it can
> be 'exec' if string consists of a sequence of statements, 'eval' if it
> consists of a single expression, or 'single' if it consists of a single
> interactive statement (in the latter case, expression statements that
> evaluate to something else than None will be printed).
> 
> The docs for compile say that if you are creating a code object from a
> sequence of statements you must use the kind argument 'exec'. Eval says
> that if you are using the eval function you must use 'eval' as your
> kind argument.
> 
> In practise I have found that using the eval function with code objects
> compiled with 'exec' as the kind argument works fine. Is this a 'bug'
> in the docs ?
> Regards,
> 

"Dear List:

I live close to a railroad, and the tracks are surrounded by a fence 
with large signs saying 'Walking on the tracks can be dangerous'.

I have walked on the tracks several times, however, and I don't see why 
the railway company put those signs there. In fact I'm walking along the 
tracks right now as I enter this post on my hand-held, and

[message ends with sound of locomotive horn followed by an ugly squelch]."

That's the kind of practice best avoided. Are you breaking the rules 
just for the fun of it?

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005          http://www.python.org/pycon/2005/
Steve Holden                           http://www.holdenweb.com/


From caleb1 at telkomsa.net  Mon Feb  7 22:53:05 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Mon, 07 Feb 2005 22:53:05 -0500
Subject: loops -> list/generator comprehensions
References: <1107718117.221204.80410@l41g2000cwc.googlegroups.com>
	<opsls54qat1js0xs@news.telkomsa.net>
	<4qCdnXI11-vhGJvfRVn-vQ@comcast.com>
	<opsls8buf21js0xs@news.telkomsa.net>
	<asSdncm4c9J1DJvfRVn-gw@comcast.com>
Message-ID: <opslu02rho1js0xs@news.telkomsa.net>

Wow, Steve, thanks, you went to some effort here.

> I prefer to give names to the values produced by os.walk -- I think it  
> makes the usage much clearer.  However, since I don't use 'dirnames', I  
> use '_' to indicate this:

Actually, I feel silly for not recognising this - I read about the Python3  
suggestion for adding a "with" syntax, and the suggestion was rather to  
use something like

   _ = instname
   _.a = 1
   _.b = 2

So I actually have seen this "_" placeholder before :)  Sorry bout that.

> Would
>
>      filenames = [os.path.join(dirpath, filename)
>                   for dirpath, dirnames, filenames in os.walk('.')
>                   for filename in filenames]
>
> have been clearer for you?  Then all you have to do is remember the  
> order of the for-loop execution:

Bizarre as this may sound, it was the '_' that was throwing me off the  
whole thing (at the 'grok' level I generally read the newsgroup,  
anyway).   For some weird reason, I can read *this* comprehension pretty  
easily!  Does that make sense at all?  I figure a little bit of  
uncertainty along the way probably derails understanding of the whole  
thing a little bit - and (mental note) I *must* remember this when I  
explain stuff to people at work, having now experienced it first hand.

Thanks again
Caleb



From todddeluca at gmail.com  Tue Feb  1 16:00:24 2005
From: todddeluca at gmail.com (todddeluca at gmail.com)
Date: 1 Feb 2005 13:00:24 -0800
Subject: a sequence question
In-Reply-To: <lzrKd.138680$K7.56500@news-server.bigpond.net.au>
References: <lzrKd.138680$K7.56500@news-server.bigpond.net.au>
Message-ID: <1107291624.405255.76150@z14g2000cwz.googlegroups.com>


Chris Wright wrote:
> Hi,
>
> 1) I want to iterate over a list "N at a time"
> sort of like:
>
> # Two at a time... won't work, obviously
>
>  >>> for a, b in [1,2,3,4]:
> ... 	print a,b
> ...
> Traceback (most recent call last):
>    File "<interactive input>", line 1, in ?
> TypeError: unpack non-sequence
>  >>>
>
>
> Is there a nifty way to do with with list comprehensions,
> or do I just have to loop over the list ?
>
> cheers and thanks
>
> chris wright

I wouldn't call this nifty, but it does use list comprehensions:
(n-(len(l)%n))%n is the amount of padding
(len(l)+(n-(len(l)%n))%n)/n is the number of groups (calculated by
adding the padding to the length of l and then dividing by n)

>>> l = range(10)
>>> n = 3
>>> [(l+[None]*((n-(len(l)%n))%n))[i*n:(i+1)*n] for i in
xrange((len(l)+(n-(len(l)%n))%n)/n)]
[[0, 1, 2], [3, 4, 5], [6, 7, 8], [9, None, None]]

Regards,
Todd



From fperez.net at gmail.com  Fri Feb  4 18:51:26 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Fri, 04 Feb 2005 16:51:26 -0700
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot><1107487113.732375.110850@c13g2000cwb.googlegroups.com><opslnmywarej1m1c@ashot><mailman.1865.1107491434.22381.python-list@python.org><opsln54fpwej1m1c@ashot>
	<36hculF51ho2sU1@individual.net><1107530489.308497.103530@g14g2000cwa.googlegroups.com><36hrjpF4ui8fbU1@individual.net>
	<mailman.1911.1107546744.22381.python-list@python.org>
	<36i84qF52ce29U1@individual.net> <opslo127s7ej1m1c@ashot>
	<cu0umf$cja$1@sea.gmane.org>
Message-ID: <cu11oc$jbj$1@sea.gmane.org>

Fernando Perez wrote:

> Ashot wrote:
> 
>> this is what it looks like:
>> 
>> http://www.freshraisins.com/sand/ipythonscreen.PNG
>> 
>> does cygwin have a readline utility in it?  Perhaps this is overriding the
>> correct one?  Thats the only thing I can think of.
> 
> Hi folks,
> 
> could you please test under windows the 1.9 version of readline?

OK, make that 1.10:

http://sourceforge.net/project/shownotes.php?release_id=302526

Gary specifically targeted the light background problems with this one, so
please report here if the whole thing gets fixed.

Regards,

f



From x2164 at mailcity.com  Wed Feb  2 09:49:56 2005
From: x2164 at mailcity.com (x2164 at mailcity.com)
Date: 2 Feb 2005 14:49:56 GMT
Subject: test_socket.py failure
References: <ctinqv0c1a@news4.newsguy.com>
	<mailman.1630.1107173295.22381.python-list@python.org>
	<ctmpr3025eh@news2.newsguy.com>
	<mailman.1723.1107313414.22381.python-list@python.org>
Message-ID: <ctqpak01igc@news4.newsguy.com>

Nick Coghlan <ncoghlan at iinet.net.au> wrote:
> x2164 at mailcity.com wrote:
> >      At the interactive python prompt i did/got the following:
> > 
> >       bash-2.04$ ./python 
> >       Python 2.4 (#1, Jan 29 2005, 10:31:35) 
> >       [GCC 2.95.3 20010315 (release)] on linux2
> >       Type "help", "copyright", "credits" or "license" for 
> >          more information.
> >       >>> import socket
> >       >>> socket.getservbyname('daytime', 'tcp')
> >       13
> >       
> >        # The 13 looks ok but look what happen 
> >        # when i asked only for the service, like
> >        # the line that fails in test_socket.
> >       
> >       >>> socket.getservbyname('daytime')       
> >       Traceback (most recent call last):
> >         File "<stdin>", line 1, in ?
> >       socket.error: service/proto not found
> >       >>>

> Hmm, when the second argument is omitted, the system call looks like:

> getservbyname("daytime", NULL);

> Based on "man getservbyname" on my Linux PC, that should give
> the behaviour we 
> want - any protocol will match.

> However:

> Linux 2.6.4-52-default (Suse 9.1)
> Glibc 2.3.3
> gcc   3.3.3

> So it may be that your older platform doesn't have this
> behaviour - I'd be very 
> interested in what 'man getservbyname' has to say.

> Cheers,
> Nick.

> -- 
> Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
> ---------------------------------------------------------------
>              http://boredomandlaziness.skystorm.net

    hey Nick,

    Just took a look at the man page for getservbyname on this
    system and it doesn't mention passing NULL as the second
    argument.  The pertinents: ;-)

	Linux kernel 2.6.10
	Glibc 2.2.5
        gcc   2.95.3

    I'd say your probably right about there being a difference
    in the behaviour of getservbyname between libc 2.2.5 and 
    and libc-2.3.3 given the differences in man pages and 
    observed return values. I'll try and compare the libcs'
    getservbyname codes and let you know a little later in 
    the day.

    I wonder if the developers wanted to tie the python source
    code so closely to a glibc version and possibly gnu-libc
    specific?

   
    pete jordan
    x2164 at mailcityDOTcom
    miami, florida


-- 
	............



From raghulj at gmail.com  Mon Feb 21 22:53:04 2005
From: raghulj at gmail.com (Raghul)
Date: 21 Feb 2005 19:53:04 -0800
Subject: about uid in imaplib
Message-ID: <1109044384.493076.35080@f14g2000cwb.googlegroups.com>

Hi guys,
         How to use "uid" and copy a message to the other folders using
python.Please help in explainig with sample code.I think,imaplib uid
object need atleast a sample to understand clearly.



From steven.bethard at gmail.com  Thu Feb  3 01:36:51 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 02 Feb 2005 23:36:51 -0700
Subject: Computing class variable on demand?
In-Reply-To: <1107410898.260491.203090@l41g2000cwc.googlegroups.com>
References: <1107410898.260491.203090@l41g2000cwc.googlegroups.com>
Message-ID: <6eydnSAjiuofW5zfRVn-sw@comcast.com>

fortepianissimo wrote:
> We all know that using __getattr__() we can compute an instance
> variable on demand, for example:
> 
> class Foo:
> def __getattr__ (self, name):
> if name == 'bar':
> self.bar = 'apple'
> return self.bar
> else:
> raise AttributeError()
> 
> Then we can
> 
> f = Foo()
> s1 = f.bar
> s2 = f.bar   # this uses the "cached" result
> 
> My question is can we do the same with class variables?

You can do this using a metaclass, e.g.:

py> class FooType(type):
...     def __getattr__(self, name):
...         if name == 'bar':
...             self.bar = 'apple'
...             return self.bar
...         else:
...             raise AttributeError('no attribute named %r' % name)
...
py> class Foo(object):
...     __metaclass__ = FooType
...
py> Foo.bar
'apple'

However, you probably don't want to.  What's your use case?

Steve


From exogen at gmail.com  Mon Feb 21 12:37:48 2005
From: exogen at gmail.com (Brian Beck)
Date: Mon, 21 Feb 2005 12:37:48 -0500
Subject: python2.4 generator expression > python2.3 list expression
In-Reply-To: <Xns9604B1AD25B91duncanrcpcouk@127.0.0.1>
References: <0ioj11dsgqhatqc3d7ldeb35rta6d9fk69@4ax.com>
	<mailman.2896.1109004722.22381.python-list@python.org>
	<Xns9604B1AD25B91duncanrcpcouk@127.0.0.1>
Message-ID: <cvd6ep$qem$1@eeyore.INS.cwru.edu>

Duncan Booth wrote:
> The difference between the original "reset the rightmost '1' bit", and your 
> interpretation: "reset the rightmost bit" is the "'1'".
> 
> The rightmost bit that is set is reset. So 0x10 -> 0, and 0x1010 -> 0x1000.
> 
> If you want to extract the least significant set bit from a number 'x' you 
> can use (x&-x):

My interpretation of Bryan's (mis?)interpretation (heh) was that since 
in the numbers 2 and 10 (as in his examples), the least significant bit 
was already 0, performing an operation that set it to 0 should result in 
the number unchanged. As his tests show, this is not the case. This is 
because the operation works only if the least significant bit actually 
NEEDS to be unset. To zero the least significant bit unconditionally, we 
can use:

x &= ~1

--
Brian Beck
Adventurer of the First Order


From suryaprakashg at gmail.com  Fri Feb 11 02:15:28 2005
From: suryaprakashg at gmail.com (suryaprakashg at gmail.com)
Date: 10 Feb 2005 23:15:28 -0800
Subject: Python v.s. c++
In-Reply-To: <mailman.2331.1108060722.22381.python-list@python.org>
References: <mailman.2331.1108060722.22381.python-list@python.org>
Message-ID: <1108106128.266428.188890@g14g2000cwa.googlegroups.com>


xiaobin yang wrote:
> Hi,  if i am already skillful with c++.  Is it useful to learn
python? thanks!



Defenitly , It is much easier to convert an idea to a living model
easily in python and with out much effort . You can always mix things
with C++ and python ( for optimization or whatever)with swig somewhat
mature now to make things easier .
look at this once you have your feet in python
www.swig.org



From aurora00 at gmail.com  Fri Feb 18 14:15:27 2005
From: aurora00 at gmail.com (aurora)
Date: Fri, 18 Feb 2005 11:15:27 -0800
Subject: unicode and socket
References: <1108753426.318777.275250@c13g2000cwb.googlegroups.com>
Message-ID: <opsmeqf1w76yt6e7@news.cisco.com>

You could not. Unicode is an abstract data type. It must be encoded into  
octets in order to send via socket. And the other end must decode the  
octets to retrieve the unicode string. Needless to say the encoding scheme  
must be consistent and understood by both ends.


On 18 Feb 2005 11:03:46 -0800, <zyqnews at 163.net> wrote:

> hello all,
>  I am new in Python. And I have got a problem about unicode.
> I have got a unicode string, when I was going to send it out throuth a
> socket by send(), I got an exception. How can I send the unicode string
> to the remote end of the socket as it is without any conversion of
> encode, so the remote end of the socket will receive unicode string?
>
> Thanks
>



From markus_GETRIDOFALLCAPSwankus at hotmail.com  Tue Feb 22 22:01:52 2005
From: markus_GETRIDOFALLCAPSwankus at hotmail.com (Markus Wankus)
Date: Tue, 22 Feb 2005 22:01:52 -0500
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <37uk2kF5gv38bU1@individual.net>
References: <cuo71l$gig$1@usenet.otenet.gr> <cvaoft$av6$1@usenet.otenet.gr>
	<874qg6937w.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<cvcv9b$nbm$1@usenet.otenet.gr> <37uk2kF5gv38bU1@individual.net>
Message-ID: <nmSSd.25321$Am3.782245@news20.bellglobal.com>

George Sakkis wrote:
> "Ilias Lazaridis" <ilias at lazaridis.com> wrote in message news:cvcv9b$nbm$1 at usenet.otenet.gr...
> 
> 
>>Nick Vargish wrote:
>>
>>>You can excuse yourself from this one and stop replying to comments,
>>>but you don't get to unilaterally declare a discussion over.
>>
>>[...]
>>
>>The discussion is over.
>>
>>At least the in-topic one.
>>
>>Everything else is babbling, hairsplitting, playing an AI which does not
>>understand writings and all this unproductive garbage.
>>
>>The Essence is this one, as stated before:
>>
>>[huge copy paste of previous post]
> 
> 
> 
> The Essence is irrelevant.
> -
> -
> -
> All your thread are belong to us.
> -
> -
> -

For great justice!

;o)


From tjreedy at udel.edu  Sat Feb 26 13:16:36 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 26 Feb 2005 13:16:36 -0500
Subject: any Python equivalent of Math::Polynomial::Solve?
References: <just-420C1F.16423926022005@news1.news.xs4all.nl><mailman.3092.1109434899.22381.python-list@python.org>
	<just-ACE943.17364326022005@news1.news.xs4all.nl>
Message-ID: <cvqe63$s24$1@sea.gmane.org>


"Just" <just at xs4all.nl> wrote in message 
news:just-ACE943.17364326022005 at news1.news.xs4all.nl...
>> Does SciPy do what you want? Specifically Scientific.Functions.FindRoot 
>> [1] &
>> Scientific.Functions.Polynomial [2]
>> http://starship.python.net/~hinsen/ScientificPython/ScientificPythonManual/Sci
>> entific_9.html
>> [2]
>> http://starship.python.net/~hinsen/ScientificPython/ScientificPythonManual/Sci
>> entific_13.html
>
> (Hm, I had the impression that scipy != Konrad Hinsen's Scientific
> module.)

www.scipy.org (first hit on "Python SciPy" google search)

Terry J. Reedy





From has.temp2 at virgin.net  Sun Feb 20 20:32:39 2005
From: has.temp2 at virgin.net (has)
Date: 20 Feb 2005 17:32:39 -0800
Subject: recommended way of generating HTML from Python
In-Reply-To: <1108933633.259271.182890@o13g2000cwo.googlegroups.com>
References: <1108889625.068929.88890@z14g2000cwz.googlegroups.com>
	<1108933633.259271.182890@o13g2000cwo.googlegroups.com>
Message-ID: <1108949559.097766.324440@f14g2000cwb.googlegroups.com>

xtian wrote:
> Stan (part of nevow, which is part of twisted) is a nice python
syntax
> for building HTML
[...]
> I don't know how detachable it is from the rest of nevow. I'd assume
it
> wouldn't be too difficult to implement in a standalone fashion.

FWIW I whipped up a simple self-contained Stan clone a while back:

http://freespace.virgin.net/hamish.sanderson/stanlite.py

It's a bit quick-n-dirty - I think ideally you'd want it to parse all
the HTML element information from a DTD and perform proper validation
of input data - but if anyone want to pick it up and run with it, or
just use it as-is, they're more than welcome to.

HTH

has



From steven.bethard at gmail.com  Thu Feb 17 14:55:06 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 17 Feb 2005 12:55:06 -0700
Subject: How to wrap a class's methods?
In-Reply-To: <4214f167$0$44618$a1866201@visi.com>
References: <4214f167$0$44618$a1866201@visi.com>
Message-ID: <Hv-dnZ4dh7oHa4nfRVn-qA@comcast.com>

Grant Edwards wrote:
> I want to subclass an IMAP connection so that most of the
> methods raise an exception if the returned status isn't 'OK'.
> This works, but there's got to be a way to do it that doesn't
> involve so much duplication:
> 
> class MyImap4_ssl(imaplib.IMAP4_SSL):
> 
>     def login(*args):
>         s,r = imaplib.IMAP4_SSL.login(*args)
>         if s!='OK':
>             raise NotOK((s,r))
>         return r
>         
>     def list(*args):
>         s,r = imaplib.IMAP4_SSL.list(*args)
>         if s!='OK':
>             raise NotOK((s,r))
>         return r
>         
>     def search(*args):
>         s,r = imaplib.IMAP4_SSL.search(*args)
>         if s!='OK':
>             raise NotOK((s,r))
>         return r
>         
>     [and so on for another dozen methods]

You could try something like (Untested!):

class Wrapper(object):
     def __init__(self, func):
         self.func = func
     def __call__(*args, **kwargs):
         self, args = args[0], args[1:]
         s, r = self.func(*args)
         if s != 'OK':
             raise NotOK((s, r))
         return r

for func_name in ['login', 'list', 'search']:
     func = Wrapper(getattr(imaplib.IMAP4_SSL, func_name))
     setattr(imaplib.IMAP4_SSL, func_name, func)

STeVe


From deetsNOSPAM at web.de  Sun Feb 13 16:04:26 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sun, 13 Feb 2005 22:04:26 +0100
Subject: builtin functions for and and or?
References: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>
Message-ID: <cuofcj$jvt$02$1@news.t-online.com>

> So usually I just write a little function any( L, boolean_function =
> identity ) or all( ... ).  But I am kind of sick of doing that all the
> time -- does it exist anywhere in the Python libraries?  It seems really
> common to me.

Put things into your own module and add it to your python path. Then you
only have to write it once. 
 
> The first way isn't satisfactory because it takes so many lines for what
> is
> essentially one "primitive" operation.  The second way isn't great because
> it is not as readable and many readers don't like to see reduce, even if
> it
> is a common idiom like that.  Also I don't believe it short circuits.

It doesn't but so doesn't your loop example. Put a break in there once
Result is False.

-- 
Regards,

Diez B. Roggisch


From antonmuhin at rambler.ru  Thu Feb 17 12:56:41 2005
From: antonmuhin at rambler.ru (anton muhin)
Date: Thu, 17 Feb 2005 20:56:41 +0300
Subject: multimethod (or rather overloading) in Python
In-Reply-To: <37k236F5fdtu1U1@individual.net>
References: <37k236F5fdtu1U1@individual.net>
Message-ID: <37k46qF5g7tt4U1@individual.net>

anton muhin wrote:

Correction:

> Of course, I can imagine some metaclasses magic that would allow to code:
> 
> class MyClass(WithOverloading):
>   @overloadMethod(A)
>   def someMetod(self, _): ...
> 
> But it would rather convoluted: the best idea I have so far is to mangle 
>  methods name in the manner most of C++ compilers do.

Stupid me. Of course, name magling is impossible and unnecessary. Sorry.

Still the question remains.

with the best regards,
anton.




From pierre.barbier at cirad.fr  Thu Feb 10 09:26:21 2005
From: pierre.barbier at cirad.fr (Pierre Barbier de Reuille)
Date: Thu, 10 Feb 2005 15:26:21 +0100
Subject: is there a safe marshaler?
In-Reply-To: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
Message-ID: <420b6e98$0$23018$626a14ce@news.free.fr>

Irmen de Jong a ?crit :
> Pickle and marshal are not safe. They can do harmful
> things if fed maliciously constructed data.
> That is a pity, because marshal is fast.
> I need a fast and safe (secure) marshaler.
> Is xdrlib the only option?
> I would expect that it is fast and safe because
> it (the xdr spec) has been around for so long.
> 
> Or are there better options (perhaps 3rd party libraries)?
> 
> Thanks
> 
> Irmen.

What exactly do you mean by "safe" ? Do you want to ensure your objects 
cannot receive corrupted data ? Do you want to ensure no code will be 
evaluated during the unmarshalling ?

Please, be more precise,

Pierre


From mahs at telcopartners.com  Tue Feb 15 17:16:57 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Tue, 15 Feb 2005 14:16:57 -0800
Subject: Can __new__ prevent __init__ from being called?
In-Reply-To: <R9idnQT4h4wN7o_fRVn-3w@powergate.ca>
References: <87is4tldea.fsf@news2.ososo.de>
	<R9idnQT4h4wN7o_fRVn-3w@powergate.ca>
Message-ID: <cuts7v$k97$1@sea.gmane.org>

Peter Hansen wrote:
> Felix Wiemann wrote:
> 
>> Sometimes (but not always) the __new__ method of one of my classes
>> returns an *existing* instance of the class.  However, when it does
>> that, the __init__ method of the existing instance is called
>> nonetheless, so that the instance is initialized a second time.  For
>> example, please consider the following class (a singleton in this case):
>>
> [snip]
> 
>> How can I prevent __init__ from being called on the already-initialized
>> object?
> 
> 
> Is this an acceptable kludge?
> 
>  >>> class C(object):
> ...  instance=None
> ...  def __new__(cls):
> ...   if C.instance is None:
> ...    print 'creating'
> ...    C.instance = object.__new__(cls)
> ...   else:
> ...    cls.__init__ = lambda self: None
> ...   return cls.instance
> ...  def __init__(self):
> ...   print 'in init'
> ...
>  >>> a = C()
> creating
> in init
>  >>> b = C()
>  >>>
> 
> (Translation: dynamically override now-useless __init__ method.
> But if that works, why do you need __init__ in the first place?)
> 
> -Peter
Or this one: use an alternative constructor:

class C(object):
    instance = None
    @classmethod
    def new(cls, *args, **kw):
      if cls.instance is None:
        print 'Creating instance.'
        cls.instance = object.__new__(cls)
        print 'Created.'
        cls.instance.__init__(*args,**kw)
      return cls.instance
    def __init__(self):
      print 'In init.'

  >>> c = C.new()
Creating instance.
Created.
In init.
  >>> c = C.new()
  >>>

Michael



From jtp11 at att.net  Tue Feb  8 14:38:21 2005
From: jtp11 at att.net (Jim)
Date: 8 Feb 2005 11:38:21 -0800
Subject: Loop in list.
In-Reply-To: <36s2b2F53f67pU1@individual.net>
References: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
	<36s2b2F53f67pU1@individual.net>
Message-ID: <1107891501.110687.134390@f14g2000cwb.googlegroups.com>

Particularly one who can't spell.  Fortran.

Jim



From aleaxit at yahoo.com  Tue Feb  8 06:44:09 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Tue, 8 Feb 2005 12:44:09 +0100
Subject: how to convert 4 bytes into a float ?
References: <cua4gu$pf7$1@s1.news.oleane.net>
	<1grny4s.18evsxl1g1c7eaN%aleaxit@yahoo.com>
	<cua6ag$qj1$1@s1.news.oleane.net>
Message-ID: <1gro09j.1e2e2kn1967308N%aleaxit@yahoo.com>

Jean-Baptiste PERIN <jb_perin at yahoo.fr> wrote:

> I'll have to handle Intel-PC, DEC-VAX and MIPS-SUN/SGI numbers
> So I can't escape the painful bit-twiddling

I don't recall for sure (even though I did my thesis on a Vax, 25 years
ago!) but I think you _might_ be lucky -- VAX used the binary format
that became the IEEE standard, if I recall correctly.

Intel, MIPS, SUN and SGI surely did follow IEEE standards, endianity
apart, and you can correct for endianity with struct.unpack.

The problem would be there if you had, say, floats in old IBM 360/370
formats, or Cray's original formats, or the like...

 
> Anyway, struct.unpack will undoubtedly be an incredibly valuable help
> 
> thank you very very very much ..

You're welcome!


Alex


From http  Sat Feb 26 05:36:31 2005
From: http (Paul Rubin)
Date: 26 Feb 2005 02:36:31 -0800
Subject: Converting HTML to ASCII
References: <mailman.3066.1109357511.22381.python-list@python.org>
	<slrnd1v5vv.nhu.jgrahn-nntq@frailea.sa.invalid>
Message-ID: <7xk6ovbob4.fsf@ruckus.brouhaha.com>

Jorgen Grahn <jgrahn-nntq at algonet.se> writes:
> You should probably do what some other poster suggested -- download
> lynx or some other text-only browser and make your code execute it
> in -dump mode to get the text-formatted html. You'll get that
> working in an hour or so, and then you can see if you need something
> more complicated.

Lynx is pathetically slow for large files.  It seems to use a
quadratic algorithm for remembering where the links point, or
something.  I wrote a very crude but very fast renderer in C that I
can post if someone wants it, which is what I use for this purpose.


From danb_83 at yahoo.com  Sun Feb  6 23:46:34 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 6 Feb 2005 20:46:34 -0800
Subject: Questions about mathematical signs...
References: <614c778e.0502061226.5f40244c@posting.google.com>
	<mailman.2031.1107722589.22381.python-list@python.org>
Message-ID: <1107751594.529913.105480@c13g2000cwb.googlegroups.com>

Jeff Epler wrote:
> On Sun, Feb 06, 2005 at 12:26:30PM -0800, administrata wrote:
> > Hi! I'm programming maths programs.
> > And I got some questions about mathematical signs.
...
> > 2. Inputing fractions like (a / b) + (c / d), It's tiring work too.
> >    Can it be simplified?
>
> Because of the rules of operator precedence,
>     a / b + c / d
> has the same meaning as the expression you gave.

And it's important to note that that meaning will change in version
3.0.  Until then, it's best to start every module with "from __future__
import division".



From akineko at pacbell.net  Thu Feb 17 14:28:15 2005
From: akineko at pacbell.net (Aki Niimura)
Date: 17 Feb 2005 11:28:15 -0800
Subject: Pmw.Balloon under Windows
In-Reply-To: <opsmb4j4virqur0o@eb.pragmadev>
References: <1108579886.983146.56130@z14g2000cwz.googlegroups.com>
	<opsmb4j4virqur0o@eb.pragmadev>
Message-ID: <1108668495.123773.162340@f14g2000cwb.googlegroups.com>


Eric Brunel wrote:

> One question: what Python do you use? Is it a regular Windows Python
> distribution or the Python delivered with Cygwin? I know by
experience
> that the Python in Cygwin has quite a lot of problems (mine crashes
*very*
> often). If you don't already use a "regular" Windows distro, I think
using
> one may solve your problem.

Yes, I noticed the difference. I'm using the Python 2.3.5 installed on
Windows.
(Pmw 1.2)

> I think the default binding for the 'X' button is to call destroy,
not quit.
> Calling destroy on the main window is almost equivalent to calling
quit, so
> maybe it can be a solution?

I have tried calling root.destroy() as you suggested. It worked.
My application is now not generating the error message.
Thank you for your suggestion.

> Not that I know of. The event_generate method won't help here, ...

Good to know that.

I think Window is a different beast as it doesn't have a window
manager.

Thank you,
Aki Niimura



From gmane-schpam at joefrancia.com  Tue Feb 15 17:32:48 2005
From: gmane-schpam at joefrancia.com (Joe Francia)
Date: Tue, 15 Feb 2005 17:32:48 -0500
Subject: Calling a function from module question.
In-Reply-To: <3LtQd.32674$6u.18210@fed1read02>
References: <UTsQd.32669$6u.27954@fed1read02>	<42125d6d$0$28977$e4fe514c@news.xs4all.nl>
	<3LtQd.32674$6u.18210@fed1read02>
Message-ID: <cutt5m$be3$1@sea.gmane.org>

Sean wrote:
>>Sean wrote:
>>
>>
>>>Then I would have a script that uses the
>>>print_this function defined in the module
>>>without using the module name in the call.
>>
>>
>>
>>from module_name import print_this
>>
>>or, even:
>>
>>from module_name import print_this as other_nice_name
>>
> 
> 
> So what if I have a whole bunch of functions - say 25 of them.
> Is there a way to do this without naming each function?
> 
> 

You do that like so: "from module import *".  But you should avoid that, 
as stated in the Python help:

   Note that in general the practice of importing * from a module or
   package is frowned upon, since it often causes poorly readable code.
   However, it is okay to use it to save typing in interactive sessions,
   and certain modules are designed to export only names that follow
   certain patterns.

The "certain patterns" usually occur in huge packages, such as in the 
various GUI toolkits.  E.g., all of the exported PyQt classes are 
prefaced with Q (QButtonGroup, QTabWidget), so doing "from qt import *" 
is fairly safe.

You can also import a module like so: "import module as m" to save on 
some typing, if that is your concern.  But namespaces are a feature of 
Python, not a limitation, so the Python way is to use them for clearer 
code.  With a large number of functions like that, it sounds more like 
you should be inheriting from a class anyway, which I think is what 
Steven Bethard meant when he suggested refactoring.

For more information on the Python way, go to the Python interpreter and 
type "import this" ;>)

-- 
Soraia: http://www.soraia.com



From martin.sand.christensen at gmail.com  Tue Feb 15 09:23:09 2005
From: martin.sand.christensen at gmail.com (Martin Christensen)
Date: Tue, 15 Feb 2005 15:23:09 +0100
Subject: multi threading in multi processor (computer)
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<420a2938$0$22987$626a14ce@news.free.fr>
	<1107964587.818199.223980@g14g2000cwa.googlegroups.com>
	<mailman.2254.1107966236.22381.python-list@python.org>
	<7xr7jlwieq.fsf@ruckus.brouhaha.com>
	<420e7ee4$0$28976$e4fe514c@news.xs4all.nl>
	<37ba2dF5b8slrU1@individual.net>
	<421133d8$0$28988$e4fe514c@news.xs4all.nl>
Message-ID: <877jl9yka9.fsf@gmail.com>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

>>>>> "Irmen" == Irmen de Jong <irmen.NOSPAM at xs4all.nl> writes:
Irmen> Naah.  What about: http://www.razorvine.net/img/killGIL.jpg

Some people have too much spare time and too weird senses of
humour...

Fortunately for the rest of us. :-) This one actually made me laugh
out loud.

Martin

- -- 
Homepage:       http://www.cs.auc.dk/~factotum/
GPG public key: http://www.cs.auc.dk/~factotum/gpgkey.txt
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.5 (GNU/Linux)
Comment: Using Mailcrypt+GnuPG <http://www.gnupg.org>

iEYEARECAAYFAkISBcwACgkQYu1fMmOQldUg2QCgq1ATLCJWqAS7SBsHpcXTduma
xjMAoII+AzDwkp2F2NZvw4PUrBUx+GDh
=Yqjf
-----END PGP SIGNATURE-----


From claudio.grondi at freenet.de  Sun Feb  6 19:45:43 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Mon, 7 Feb 2005 00:45:43 -0000
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot> <opsln54fpwej1m1c@ashot>
	<36hculF51ho2sU1@individual.net>
	<1107530489.308497.103530@g14g2000cwa.googlegroups.com>
	<36hrjpF4ui8fbU1@individual.net>
	<mailman.1911.1107546744.22381.python-list@python.org>
	<36i84qF52ce29U1@individual.net> <opslo127s7ej1m1c@ashot>
	<cu0umf$cja$1@sea.gmane.org>
	<mailman.1936.1107561113.22381.python-list@python.org>
	<opslo7jfhqej1m1c@ashot> <36l1dgF52b9d6U1@individual.net>
	<4205605f_2@news.unc.edu> <42057751_1@news.unc.edu>
	<36n1gfF505tarU1@individual.net>
Message-ID: <36nog9F4udan0U1@individual.net>

Hi,

I have just updated previously announced
and uploaded to
 http://people.freenet.de/AiTI-IT/Python/Console.py
version
of Console.py because I was not satisfied with
it (it didn't support arbitrary ANSI escape
sequences for setting text colors ...)

Now the Console() class supports ANSI escape
sequences of the form ESC[#m and ESC[#,#m ,
so it is possible to set any colors for text and
background  via escape sequences.

Resetting the colors with ESC[0m will set
them back to initial(default) ones.

Now it is also possible to send a _sequence_
of  ANSI escape sequences to Console.write().
e.g.
     '\x1B[31m'
     '\x1B[1m'
will cause later submitted text to be light red.

Running Console.py creates coloured
test output which can be checked for
integrity.

Any feedback is welcome.

Claudio

"Claudio Grondi" <claudio.grondi at freenet.de> schrieb im Newsbeitrag
news:36n1gfF505tarU1 at individual.net...
> Hi,
>
> I have done some more work on Console.py
> from the readline package version 1.12, adding
> support for background colors and testing of proper
> function of them (run the Console.py script to
> see coloured output).
> Added was also the possibility to set the default
> text/background colors for colored output using:
>   Console.setStandardBackgroundColorTo(strColor)
>   Console.setStandardForegroundColorTo(strColor)
> where strColor can be one of:
> [
>  '(dark)black'
> ,'(dark)red',
> ,'(dark)green'
> ,'(dark)yellow'
> ,'(dark)blue'
> ,'(dark)purple'
> ,'(dark)cyan'
> ,'(dark)white'
> ,'light black'
> ,'light red'
> ,'light green'
> ,'light yellow'
> ,'light blue'
> ,'light purple'
> ,'light cyan'
> ,'light white'
> ]
>
> There are some comments added where e.g.
> the colors are named including their HTML color
> notation to clarify which colors are displayed.
> I work on Windows 2000 SP 4, so it will be
> interesting for me to get some feedback if the
> colors are the same in other Windows versions.
> Which colors are displayed on Linux/Unix by
> the native readline?
>
> There are also some other changes done to
> make the code better readable (from my
> personal point of view ;-)
>
> The blnIPythonFixActive flag allows to set colored
> text output of IPython to (dark)white background
> (instead of the standard one, which is  in my
> Console the 'light white' one i.e. I work with white
> background as IDLE does).
>
> Another modification is, that when a text without
> escape sequences is passed to Console.write(),
> no escape sequences are sent, so, that the
> colouring stays the same until it is explicitely
> reset. I find this behaviour more strightforward
> than the implicit writing of texts in the standard
> colors if no colors are specified.
>
> If someone is interested to check it out I have
> uploaded it to:
>  http://people.freenet.de/AiTI-IT/Python/Console.py
>
> The extended Console.py module can be used
> standalone for writing of any coloured texts
> to the console using alternatively .
>   Console.setStandardBackgroundColorTo(strColor)
>   Console.setStandardForegroundColorTo(strColor)
>   with resetting the colors
> or the build-in ANSI escape sequences for the
> text and the background.
>
> Utilizing the code or some parts of it in
> the next release of readline is welcome.
>
> Claudio
>
> "Gary Bishop" <gb at cs.unc.edu> schrieb im Newsbeitrag
> news:42057751_1 at news.unc.edu...
> > On SourceForge you will find release 1.12 of my Python readline
> > module. If you don't want to hack the colors, there is no reason to
> > upgrade from 1.11 to 1.12. They *should* work the same.
> >
> > But if you'd like to hack the iPython colors this new version makes it
> > possible.  In your ipythonrc file add a line like:
> >
> > execfile hackcolors.py
> >
> > Now in hackcolors.py you can change colors and backgrounds like this:
> >
> > ####hackcolors.py####
> > import readline
> >
> > # reach deep into the bowels of readline to get the color table
> > escape_to_color = readline.rl.console.escape_to_color
> >
> > # change a color
> > escape_to_color['0;32'] = 0x72
> >
> > del escape_to_color
> > del readline
> >
> > #################
> >
> > The two hex digits are the background and foreground color
> > respectively. In the example above I'm setting the color to green on a
> > grey background. Here is the table that is normally used to translate
> > colors.
> >
> >   escape_to_color = { '0;30': 0x0,             #black
> >                       '0;31': 0x4,             #red
> >                       '0;32': 0x2,             #green
> >                       '0;33': 0x4+0x2,         #brown?
> >                       '0;34': 0x1,             #blue
> >                       '0;35': 0x1+0x4,         #purple
> >                       '0;36': 0x2+0x4,         #cyan
> >                       '0;37': 0x1+0x2+0x4,     #grey
> >                       '1;30': 0x1+0x2+0x4,     #dark gray
> >                       '1;31': 0x4+0x8,         #red
> >                       '1;32': 0x2+0x8,         #light green
> >                       '1;33': 0x4+0x2+0x8,     #yellow
> >                       '1;34': 0x1+0x8,         #light blue
> >                       '1;35': 0x1+0x4+0x8,     #light purple
> >                       '1;36': 0x1+0x2+0x8,     #light cyan
> >                       '1;37': 0x1+0x2+0x4+0x8, #white
> >                       '0': None,
> >                       }
> >
> > An interested party should be able to arbitrarily map colors and their
> > backgrounds.
> >
> > Enjoy,
> > gb
> >
>
>




From wweston at att.net  Tue Feb  1 14:25:25 2005
From: wweston at att.net (wes weston)
Date: Tue, 01 Feb 2005 19:25:25 GMT
Subject: How do you do arrays
In-Reply-To: <tbunce-0102051052450001@192.168.1.12>
References: <tbunce-0102051052450001@192.168.1.12>
Message-ID: <FIQLd.131737$w62.55084@bgtnsc05-news.ops.worldnet.att.net>

Thomas Bunce wrote:
> I am new at Pyton and I am learning from book not classes
> so please forgive my being slow
> 
> The below does not work I get an Error of  File 
> "Matrix[index] = k
> NameError: name 'iMatrix' is not defined"
> 
> while  index < majorlop1:
>    index = index + 1
>    k = random.choice(listvalues) + 1
>    iMatrix[index] = k
> 
> The book statement of 
>  array(typecode, initializer) does not make sence
> to me how it henerates ore relaes to the org name 
> for the array.
> 
> Thank You
>      Tom

Thomas,
    You can do

 >>> m = [4]
 >>> m
[4]

wes



From tjreedy at udel.edu  Mon Feb 28 13:43:53 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 28 Feb 2005 13:43:53 -0500
Subject: Python - what is the fastest database ?
References: <1109592623.116661.101880@g14g2000cwa.googlegroups.com>
Message-ID: <cvvogo$p0r$1@sea.gmane.org>


<martijn at gamecreators.nl> wrote in message 
news:1109592623.116661.101880 at g14g2000cwa.googlegroups.com...
>> How is it possible that google (super big database) is super fast?
> What type database do they use / software ?

On the hardware side, Google's secret is massively parallel cluster 
computing, coupled with proprietary software for splitting tasks and 
joining results.  They have perhaps 200,000 CPUs.  A query might be given 
to hundreds of them for a fraction of a second.

Terry J. Reedy





From paddy3118 at netscape.net  Fri Feb 18 05:57:45 2005
From: paddy3118 at netscape.net (paddy3118 at netscape.net)
Date: 18 Feb 2005 02:57:45 -0800
Subject: combining several lambda equations
References: <2ae25c6b.0502180224.3d6164a7@posting.google.com>
	<mailman.2794.1108722811.22381.python-list@python.org>
Message-ID: <1108724265.565392.192590@c13g2000cwb.googlegroups.com>

Fredrik Lundh wrote:
> Paddy McCarthy wrote:
>
> > #If given:two or more lambda equations
> > x=lambda : A < B
> > y=lambda : C+6 >= 7
> >
> > How do I create another lambda expression Z equivalent to
> >
> > Z=lambda : (A<B) and (C+6>=7)
> >
> > # i.e. the anding together of the originals, but without
referencing
> > # globals x and y as they are artificial in that I will start of
with
> > # probably a list of lambda equations.
>
>     x=lambda : A < B
>     y=lambda : C+6 >= 7
>     Z=lambda x=x, y=y: x() and y()
>     del x, y
>
> </F>

Thanks Frederik.

I actually have a set of lambdas so my use will be more like:


>>> s = set([lambda : A < B, lambda : C+6 >= 7])
>>> x=s.pop(); y=s.pop()
>>> Z=lambda x=x, y=y: x() and y()
>>> del x,y
>>> A,B,C = [2,3,1]
>>> Z()
True
>>> A,B,C = [2,3,0]
>>> Z()
False
>>> A,B,C = [3,3,1]
>>> Z()
False
>>> 

- Gosh, isn't life fun!

- Pad.



From ncoghlan at iinet.net.au  Sat Feb  5 11:54:03 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 06 Feb 2005 02:54:03 +1000
Subject: variable declaration
In-Reply-To: <MSGID_2=3A5025=2F3.131_4204b0a9@fidonet.org>
References: <4202A022.3050209@netscape.net>
	<MSGID_2=3A5025=2F3.131_4204b0a9@fidonet.org>
Message-ID: <4204FA2B.6030803@iinet.net.au>

Alexander Zatvornitskiy wrote:
> var epsilon=0
> var S
> S=0
> while epsilon<10:
>   S=S+epsilon
>   epselon=epsilon+1#interpreter should show error here,if it's in "strict mode"
> print S
> 
> It is easy, and clean-looking.
> 
> Alexander, zatv at bk.ru

An alternate proposal, where the decision to request rebinding semantics is made 
at the point of assignment:

epsilon = 0
S = 0
while epsilon < 10:
   S .= S + epsilon
   epselon .= epsilon + 1 #interpreter should show error here
print S

Of course, this is a bad example, since '+= ' can be used already:

S = 0
epsilon = 0
while epsilon<10:
   S += epsilon
   epselon += 1 #interpreter DOES show error here
print S

However, here's an example where there is currently no way to make the rebinding 
intent explicit:

def collapse(iterable):
     it = iter(iterable)
     lastitem = it.next()
     yield lastitem
     for item in it:
         if item != lastitem:
             yield item
             lastitem = item

With a rebinding operator, the intent of the last line can be made explicit:

def collapse(iterable):
     it = iter(iterable)
     lastitem = it.next()
     yield lastitem
     for item in it:
         if item != lastitem:
             yield item
             lastitem .= item

(Note that doing this *will* slow the code down, though, since it has to check 
for the existence of the name before rebinding it)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From justaskme at if.you.want.to.contact.me  Tue Feb  8 06:29:04 2005
From: justaskme at if.you.want.to.contact.me (Joe)
Date: Tue, 08 Feb 2005 12:29:04 +0100
Subject: Big development in the GUI realm
References: <200502072347.j17NlPnh012281@mail07.syd.optusnet.com.au>
	<mailman.2151.1107853909.22381.python-list@python.org>
Message-ID: <3r7h01tsdc0m04nuclqp4aadd80vu77q58@4ax.com>

On Tue, 8 Feb 2005 10:01:51 +0100, "Fredrik Lundh"
<fredrik at pythonware.com> wrote:
>except that if *you* set things up so the code is combined when run, *you* are
>copying, distributing, and/or modifying the program in order to mix, include and/or
>combine your work with the GPL:ed work.
>
>if you leave all that to the user, you're clear.

Mmm... I'm not playing games here, no matter what some seem to think. 

It's obvious that the GPL doesn't say precisely whether it's OK to use
an _independent_ library or EXE, ie. a file that is physically
different from the calling EXE, as oppposed to either copy/pasting the
code as is into a program, or statically linking a library into an
EXE.

Until now, I understood the GPL to be a way to make sure no one stole
code (hence, no static linking or copy/pasting code), and with or
without giving back any change they made.

OTOH, I though it was OK to use the by code shipping whatever standard
binary file was downloaded from the project's site, ie. MYEXE.EXE
calling YOURCODE.DLL was OK, when this code was the standard version,
untampered, and clearly indicated as not the EXE's work (as shown by
the file name and version infos).

Hence, either the GPL was not precise enough, or TrollTech should use
a different license that specifically prohibits even using Qt through
dynamic linking.

Conclusion from what I read above: As of now, no court in any country
has settled this issue by specifying whether making use of a GPLed
program _in any way_ requires the calling program to be GPLed as well,
or if there are cases where the EXE can remain closed-source. I'm fine
with TT's intentions, though.

Joe
(no, I don't want whatever stuff I post on the Net to possibly bite me
years from now, hence the anonymous posting. Nothing personal.)


From fakeadmin at gmail.com  Fri Feb 11 01:27:11 2005
From: fakeadmin at gmail.com (rhat)
Date: 10 Feb 2005 22:27:11 -0800
Subject: Unit Testing in Python
In-Reply-To: <mailman.2364.1108095149.22381.python-list@python.org>
References: <1108087841.271630.228970@o13g2000cwo.googlegroups.com>
	<mailman.2364.1108095149.22381.python-list@python.org>
Message-ID: <1108103231.850267.325300@z14g2000cwz.googlegroups.com>

I actually meant to link to the last two ONLamp articles you mentioned,
so yeah I have seen those (kinda forgot to post them, in fact). Thanks
for the other links too, they look pretty interesting.
Incidentally, what kind of projects are you guys (planning on) using
this technology with? I'm working on educational software, and thought
that it might be neat to try unittest out on. Though, in truth, I don't
know enough about unit-testing to make a design decision that large
yet.

Feel free to [reply | flame the n00b],
Ryan Kaulakis



From elena at monmouth.com  Thu Feb 17 18:51:47 2005
From: elena at monmouth.com (elena at monmouth.com)
Date: 17 Feb 2005 15:51:47 -0800
Subject: Help with research
Message-ID: <1108684307.612656.92010@c13g2000cwb.googlegroups.com>

Apologies for this off-topic post.

I'm a Java/C++ developer who is also studying psychology.

I would really appreciate it if you would complete a survey that I'm
using for a research project on programmers.

It's easy [Yes/No answers] and takes about 5 minutes.

I will be presenting the results at the American Psychological
Association convention in August.

The study link is:

                     http://www.elena.com

The survey measures "cognitive style" (analytical/intuitive) which
describes how you process information and learn. The people I've
pre-tested it with found it to be pretty interesting.

I can go to my friends, however it occurred to me that it might be
better to post in a newsgroup and get a larger, more diverse, and
random sample. 

Thanks again for your time, 

Elena



From frans.englich at telia.com  Sat Feb 19 18:19:41 2005
From: frans.englich at telia.com (Frans Englich)
Date: Sat, 19 Feb 2005 23:19:41 +0000
Subject: Distutils: relative paths
Message-ID: <200502192319.41360.frans.englich@telia.com>


Hello,

I have trouble installing a data directory which is not a child of my package 
directory in the source directory.

My source directory looks like this:

./setup.py
schemas/*.xsd
foo/*.py

And when it's installed, it should look like:

site-packages/foo/*.py
site-packages/foo/schemas/*.xsd

In other words, schemas, from being a sibling of foo, became a child of foo.

Now, how is this expressed in the setup.py?

I tried this:

setup( name="Foo",
    packages=["foo"],
    package_data={ "foo": ["../schemas/*.xsd"] },
    package_dir={ "foo": "foo"},
	[...]

but it resulted in schemas being a package, not child of foo(!). 

I've read the relevant page in the reference manual, 
http://www.python.org/doc/current/dist/node11.html

but I can't find the trick. Any ideas?


Cheers,

		Frans



From mt at 3planes.com  Tue Feb  1 11:34:47 2005
From: mt at 3planes.com (Michael Tobis)
Date: 1 Feb 2005 08:34:47 -0800
Subject: pythonic equivalent of Mathematica's FixedPoint function
References: <1107273234.276714.272890@z14g2000cwz.googlegroups.com>
	<1107273715.614766.32810@f14g2000cwb.googlegroups.com>
Message-ID: <1107275687.426288.166820@f14g2000cwb.googlegroups.com>

We apologise for the previous apology.
http://arago4.tn.utwente.nl/stonedead/albums-cds/sketches/another-monty-python-record/apologies.html
--
mt



From harlinseritt at yahoo.com  Wed Feb 16 08:01:12 2005
From: harlinseritt at yahoo.com (Harlin)
Date: 16 Feb 2005 05:01:12 -0800
Subject: Compiler
In-Reply-To: <mailman.2677.1108536846.22381.python-list@python.org>
References: <420990CF.7000705@ocf.berkeley.edu>
	<BAY102-F16C2D5E48CA8D5293EEE2C866B0@phx.gbl>
	<mailman.2677.1108536846.22381.python-list@python.org>
Message-ID: <1108556997.434279.137450@g14g2000cwa.googlegroups.com>

Easy, easy... Use py2exe:
http://starship.python.net/crew/theller/py2exe/



From has.temp2 at virgin.net  Wed Feb  9 18:57:10 2005
From: has.temp2 at virgin.net (has)
Date: 9 Feb 2005 15:57:10 -0800
Subject: A great Alan Kay quote
In-Reply-To: <420a5c1e$0$21630$a1866201@visi.com>
References: <420a5c1e$0$21630$a1866201@visi.com>
Message-ID: <1107993430.712644.298500@f14g2000cwb.googlegroups.com>

Grant Edwards wrote:
> In an interview at
http://acmqueue.com/modules.php?name=Content&pa=showpage&pid=273
> Alan Kay said something I really liked, and I think it applies
> equally well to Python as well as the languages mentioned:
>
>    I characterized one way of looking at languages in this
>    way: a lot of them are either the agglutination of features
>    or they're a crystallization of style

I'd say Python is somewhere in the middle, though moving slowly towards
'agglutination' in the last couple years.


> The rest of the interview is pretty interesting as well.

Excellent link, thanks.



From rbt at athop1.ath.vt.edu  Fri Feb 18 17:44:37 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Fri, 18 Feb 2005 17:44:37 -0500
Subject: re.compile and very specific searches
In-Reply-To: <1108758810.163024.169750@g14g2000cwa.googlegroups.com>
References: <cv5ba4$nvn$1@solaris.cc.vt.edu>
	<cv5chc$k27$01$1@news.t-online.com>
	<1108758810.163024.169750@g14g2000cwa.googlegroups.com>
Message-ID: <42166FD5.2070106@athop1.ath.vt.edu>

John Machin wrote:
> Diez B. Roggisch wrote:
> 
> 
> 
>>So I'd suggest you dump re and do it like this:
>>
>>address = "192.168.1.1"
>>
>>def validate_ip4(address):
>>    digits = address.split(".")
>>    if len(digits) == 4:
>>        for d in digits:
>>            if int(d) < 0 or int(d) > 255:
>>                  return False
>>    return True
>>
> 
> 
> The OP wanted to "find" IP addresses -- unclear whether re.search or
> re.match is required. Your solution doesn't address the search case.
> For the match case, it needs some augmentation. It will fall apart if
> presented with something like "..." or "comp.lang.python.announce". AND
> while I'm at it ... in the event of a valid string of digits, it will
> evaluate int(d) twice, rather unnecessarily & uglily.
> 
> So: match case:
> 
> ! for s in strings_possibly_containing_digits:
> ! #   if not(s.isdigit() and 0 <= int(s) <= 255): # prettier, but test
> on zero is now redundant
> !     if not s.isdigit() or int(s) > 255:
> 
> and the search case: DON'T dump re; it can find highly probable
> candidates (using a regexp like the OP's original or yours) a damn
> sight faster than anything else this side of C or Pyrex. Then you
> validate the result, with a cut-down validator that relies on the fact
> that there are 4 segments and they contain only digits:

This is what I ended up doing... re.compile and then findall(data) does an excellent 
job finding all strings that look like ipv4 addys, then the split works just as well 
in weeding out strings that are not actual ipv4 addys.

Thanks to all for the advice!


From rt-announce-bounces at lists.bestpractical.com  Fri Feb 11 00:08:35 2005
From: rt-announce-bounces at lists.bestpractical.com (rt-announce-bounces at lists.bestpractical.com)
Date: Fri, 11 Feb 2005 00:08:35 -0500
Subject: Your message to RT-Announce awaits moderator approval
Message-ID: <mailman.788.1108098515.22590.rt-announce@lists.bestpractical.com>

Your mail to 'RT-Announce' with the subject

    Is delivered mail

Is being held until the list moderator can review it for approval.

The reason it is being held:

    Post by non-member to a members-only list

Either the message will get posted to the list, or you will receive
notification of the moderator's decision.  If you would like to cancel
this posting, please visit the following URL:

    http://lists.bestpractical.com/cgi-bin/mailman/confirm/rt-announce/3b837be742e4def446d41a87c444e0c8d91c18b4



From moa at extrapolation.com  Wed Feb  2 18:48:00 2005
From: moa at extrapolation.com (moa at extrapolation.com)
Date: 2 Feb 2005 15:48:00 -0800
Subject: Reinstall python 2.3 on OSX 10.3.5?
Message-ID: <1107388080.703032.116150@g14g2000cwa.googlegroups.com>

Hi there

I started a very long and roundabout process of attempting to install
python 2.3.4 along side my apple-installed 2.3 system. To make a long
story short, I have completely confabulated my environment ( i deleted
the 2.3 binaries and so forth from the system in an attempt to start
things fresh), and now I cannot figure out how to reinstall the base
2.3 Apple python distribution.
Can somebody please point me in the right direction?

best -Nick



From tchur at optushome.com.au  Mon Feb  7 20:22:45 2005
From: tchur at optushome.com.au (Tim Churches)
Date: Tue, 08 Feb 2005 12:22:45 +1100
Subject: Big development in the GUI realm
Message-ID: <200502080122.j181MjPL005569@mail22.syd.optusnet.com.au>

An embedded and charset-unspecified text was scrubbed...
Name: not available
URL: <http://mail.python.org/pipermail/python-list/attachments/20050208/d513a936/attachment.ksh>

From lordchaica at free.fr  Mon Feb  7 12:40:02 2005
From: lordchaica at free.fr (chaica)
Date: Mon, 07 Feb 2005 17:40:02 +0000
Subject: Tar module issue
In-Reply-To: <cu7or0$470$1@pump1.york.ac.uk>
References: <mailman.2060.1107775422.22381.python-list@python.org>
	<cu7or0$470$1@pump1.york.ac.uk>
Message-ID: <1107798002.4774.25.camel@desktop>

Thx for your response.
The fact is that I use tar.close() at the end of my code. This is really
a random behaviour cause with an archive which has a short directory
tree, I don't have this kind of beahavior and the archive works.

thx


On Mon, 2005-02-07 at 13:01 +0000, Russell Bungay wrote:
> Hello,
> 
> > I'm using tarfile module to create an archive. For my example I'm using
> > Amsn file and directory tree.
> > My variables are like these ones: 
> > path = /home/chaica/downloads/amsn-0_94/skins/Tux/smileys/shades.gif
> > fileName = amsn-0_94/skins/Tux/smileys/shades.gif
> > tar.add( path, fileName )
> > and while untaring my archive with tar jxvf I've random errors :
> > tar: amsn-0_94/lang/genlangfiles.c: Cannot hard link to
> > `amsn-0_94/lang/genlangfiles.c': No such file or directory
> > I checked google and saw that errors like these ones could occur when
> > you use global path while taring, but I'm not, using fileName which is
> > local. 
> 
> I used tarfile for the first time at the weekend and noticed one thing 
> that may help.  I don't know if it is a specific solution to your 
> problem, but it might be worth a try.
> 
> I noticed that if I didn't explicitly close the tarfile with tar.close() 
> after I had added the files, the resultant file would sometimes not be 
> written properly (even with completed execution of the whole script). 
> Explicitly closing the file would make these problems go away.
> 
> I hope that helps,
> 
> R
-- 
chaica <lordchaica at free.fr>



From usenet_spam at janc.invalid  Wed Feb  2 20:20:36 2005
From: usenet_spam at janc.invalid (JanC)
Date: Thu, 03 Feb 2005 01:20:36 GMT
Subject: python and gpl
References: <m3oef6xm1l.fsf@peds-pc311.bsd.uchicago.edu>
	<mailman.1661.1107206116.22381.python-list@python.org>
	<7xy8e8vnza.fsf@ruckus.brouhaha.com>
Message-ID: <Xns95F217D6D88D5JanC@213.118.75.35>

Paul Rubin schreef:

> My IANAL amateur reading is that the GPL does in fact apply, at least
> in the US.  Running the program is not restricted, but loading the
> program from disk to memory before you can run it counts as copying
> it, which invokes the license, Computer Associates v. Altai, 982 F.2d
> 693.  I personally believe that doctrine is insane, but that's what
> software companies pushed through the courts in order to make
> shrink-wrap EULA's enforceable.  (Otherwise they'd only be enforceable
> if you agreed to the terms before the vendor got your money).

In Belgium (and the whole EU, I think) copying a program from disk to 
memory to be able to run it is covered under "fair use" (just like copying 
digital data from an audio CD to a DAC to be able to listen to it is fair 
use), which can't be restricted by companies.

AFAIK. IANAL. Etc.  ;-)

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From jack at performancedrivers.com  Tue Feb 15 18:27:59 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Tue, 15 Feb 2005 18:27:59 -0500
Subject: Can __new__ prevent __init__ from being called?
In-Reply-To: <87is4tldea.fsf@news2.ososo.de>
References: <87is4tldea.fsf@news2.ososo.de>
Message-ID: <20050215232759.GB11812@performancedrivers.com>

On Tue, Feb 15, 2005 at 10:30:21PM +0100, Felix Wiemann wrote:
> Sometimes (but not always) the __new__ method of one of my classes
> returns an *existing* instance of the class.  However, when it does
> that, the __init__ method of the existing instance is called
> nonetheless, so that the instance is initialized a second time.  For
> example, please consider the following class (a singleton in this case):
> 
> >>> class C(object):
> ...   instance = None
> ...   def __new__(cls):
> ...     if C.instance is None:
> ...       print 'Creating instance.'
> ...       C.instance = object.__new__(cls)
> ...       print 'Created.'
> ...     return cls.instance
> ...   def __init__(self):
> ...     print 'In init.'
> ...
<snip> 
> How can I prevent __init__ from being called on the already-initialized
> object?
<snip>
> Is there an easier way than using a metaclass and writing a custom
> __call__ method?

The standard recipe is to define an alternate init method and call it
once when you instantiate the object (I couldn't find it on ASPN though).

Here is a cut-n-paste from production code.  The work normally done in
the magic __init__() is done in init() instead.

class Page(context.AppContext):
  """the One True Singleton """
  _single = None # our singleton reference
  def __new__(cls, *args, **opts):
    if (Page._single is None):
      Page._single = object.__new__(cls)
      Page._single.init(*args, **opts)
    return Page._single

  def __init__(self, *args, **opts):
    """We are a singleton, so setup is done just once in init() because
       __init__() will be called every time the singleton is re-issued
       This __init__ just prevents our parent's __init__'s from running other
       than when told to by our init()
    """
    return

  def init(self, req = None):
    """setup Db objects, cgi params etc
    Here is also where we decide if we are being run from the command
    line or in mod_python"""
    context.AppContext.__init__(self, req)
    # lots of initialization done here
    return

Page is a singleton but it inherits from the class context.AppContext
which is just a regular class.  The empty Page.__init__ doesn't call
the context.AppContext.__init__ but the once-only Page.init does.

Hope that helps,

-Jack


From sjmachin at lexicon.net  Fri Feb 25 18:17:58 2005
From: sjmachin at lexicon.net (John Machin)
Date: 25 Feb 2005 15:17:58 -0800
Subject: Splitting strings - by iterators?
In-Reply-To: <pan.2005.02.25.16.44.45.546125@jeremysanders.net>
References: <pan.2005.02.25.15.55.31.77881@jeremysanders.net>
	<38913oF5mi8arU2@individual.net>
	<pan.2005.02.25.16.44.45.546125@jeremysanders.net>
Message-ID: <1109373478.706104.174080@o13g2000cwo.googlegroups.com>


Jeremy Sanders wrote:
> On Fri, 25 Feb 2005 17:14:24 +0100, Diez B. Roggisch wrote:
>
> > Maybe [c]StringIO can be of help. I don't know if it's iterator is
lazy. But
> > at least it has one, so you can try and see if it improves
performance :)
>
> Excellent! I somehow missed that module. StringIO speeds up the
iteration
> by a factor of 20!
>

Twenty?? StringIO.StringIO or cStringIO.StringIO???

I did some "timeit" tests using the code below, on 400,000 lines of 53
chars (uppercase + lowercase + '\n').

On my config (Python 2.4, Windows 2000, 1.4 GHz Athlon chip, not short
of memory), cStringIO took 0.18 seconds and the "hard way" took 0.91
seconds. Stringio (not shown) took 2.9 seconds. FWIW, moving an
attribute look-up in the (sfind = s.find) saves only about 0.1 seconds.

>python -m timeit -s "import itersplitlines as i; d =
i.mk_data(400000)" "i.test_csio(d)"
10 loops, best of 3: 1.82e+005 usec per loop

>python -m timeit -s "import itersplitlines as i; d =
i.mk_data(400000)" "i.test_gen(d)"
10 loops, best of 3: 9.06e+005 usec per loop

A few questions:
(1) What is your equivalent of the "hard way"? What [c]StringIO code
did you use?
(2) How did you measure the time?
(3) How long does it take *compile* your 400,000-line Python script?

!import cStringIO
!
!def itersplitlines(s):
!   if not s:
!      yield s
!      return
!   pos = 0
!   sfind = s.find
!   epos = len(s)
!   while pos < epos:
!      newpos = sfind('\n', pos)
!      if newpos == -1:
!         yield s[pos:]
!         return
!      yield s[pos:newpos+1]
!      pos = newpos+1
!
!def test_gen(s):
!   for z in itersplitlines(s):
!      pass
!
!def test_csio(s):
!   for z in cStringIO.StringIO(s):
!      pass
!
!def mk_data(n):
!   import string
!   return (string.lowercase + string.uppercase + '\n') * n



From seberino at spawar.navy.mil  Wed Feb  2 01:09:34 2005
From: seberino at spawar.navy.mil (seberino at spawar.navy.mil)
Date: 1 Feb 2005 22:09:34 -0800
Subject: How run valgrind on Python C extensions?
Message-ID: <1107324574.108521.183170@z14g2000cwz.googlegroups.com>

I have Python C extensions that are giving me seg faults that I'd
like to run valgrind on.

Can I use valgrind on these through python??  HOW???

Is it easy or must I do some work like recompiling python source
with the -g extension?

Thanks!

Chris



From pythonista at gmail.com  Tue Feb  1 14:22:35 2005
From: pythonista at gmail.com (Sean Blakey)
Date: Tue, 1 Feb 2005 11:22:35 -0800
Subject: How do you do arrays
In-Reply-To: <tbunce-0102051052450001@192.168.1.12>
References: <tbunce-0102051052450001@192.168.1.12>
Message-ID: <372a7624050201112229973af8@mail.gmail.com>

On Tue, 01 Feb 2005 10:52:45 -0800, Thomas Bunce <tbunce at mac.com> wrote:
> I am new at Pyton and I am learning from book not classes
> so please forgive my being slow
> 
> The below does not work I get an Error of  File
> "Matrix[index] = k
> NameError: name 'iMatrix' is not defined"
> 
> while  index < majorlop1:
>    index = index + 1
>    k = random.choice(listvalues) + 1
>    iMatrix[index] = k
> 
> The book statement of
>  array(typecode, initializer) does not make sence
> to me how it henerates ore relaes to the org name
> for the array.
> 
> Thank You
>      Tom
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
Like any other variable, you need to declare iMatrix before you use it:
$ python
Python 2.4 (#1, Dec 28 2004, 12:08:51) 
[GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import random
>>> import array
>>> index = 0
>>> majorlop1 = 4
>>> iMatrix = array.array('b')
>>> listvalues = [1, 2, 3, 4]
>>> while index < majorlop1:
...     index = index + 1
...     k = random.choice(listvalues) + 1
...     iMatrix.append(k) 
... 
>>> iMatrix
array('b', [3, 5])
>>> 

You should probably look at the wealth of information at
http://www.python.org/doc - the tutorial is a good start on how to use
the language, and the library reference has much more depth on the
array module.
http://docs.python.org/lib/module-array.html
-- 
Sean Blakey
Saint of Mild Amusement, Evil Genius, Big Geek
Python/Java/C++/C(Unix/Windows/Palm/Web) developer
quine = ['print "quine =",quine,"; exec(quine[0])"'] ; exec(quine[0])


From cdieterich at geosci.uchicago.edu  Wed Feb  2 23:08:38 2005
From: cdieterich at geosci.uchicago.edu (Christian Dieterich)
Date: Wed, 2 Feb 2005 22:08:38 -0600
Subject: Finding user's home dir
In-Reply-To: <5i9rtc.rq31.ln@orion.homeinvalid>
Message-ID: <4808964F-7599-11D9-AA01-000A9582377C@geosci.uchicago.edu>

On D? C?adaoin, Feabh 2, 2005, at 13:26 America/Chicago, Nemesis wrote:

> Hi all, I'm trying to write a multiplatform function that tries to
> return the actual user home directory. I saw that

> Please, could you test it on your systems and tell me what you got?
> I'd like to know what it returns on different operating systems because
> I'm developing a multiplatform software.

It works with Python 2.2 and Python 2.3 on Mac OS 10.2 and Debian Linux.

Christian



From dbasch at yahoo.com  Fri Feb  4 15:27:13 2005
From: dbasch at yahoo.com (Derek Basch)
Date: Fri, 4 Feb 2005 12:27:13 -0800 (PST)
Subject: CGI and HTTP Header Location redirects
Message-ID: <20050204202713.36107.qmail@web20828.mail.yahoo.com>

Ahhhh... I should have been more specific before. The Apache error log doesn't
produce an error. You are probably correct that it is most likely an
Apache/Unix problem. I thought perhaps someone had maybe run into this before
since it seems like such a basic function to not work. Thanks for the help.

Paul Rubin wrote:
> Derek Basch <dbasch at yahoo.com> writes:
> 
>>Also, after enabling suEXEC on the apache server the script executes
>>perfectly with the redirect. Can anyone explain this behavior? I
>>would guess that it is related to apache user rights but I can't
>>find any reference to such problems via Google.
> 
> 
> Apache probably isn't able to run the cgi because of lack of exec
> permission or something like that.  The best way to diagnose such
> probs is by checking the apache error log, if you have access to it.
> 
> Best newsgroup for this type of question is
> comp.infosystems.www.servers.unix.  Lots of apache experts hang out there.


		
__________________________________ 
Do you Yahoo!? 
Yahoo! Mail - now with 250MB free storage. Learn more.
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From aahz at pythoncraft.com  Tue Feb  8 21:51:16 2005
From: aahz at pythoncraft.com (Aahz)
Date: 8 Feb 2005 21:51:16 -0500
Subject: An Ode To My Two Loves
References: <mailman.1982.1107624858.22381.python-list@python.org>
	<slrnd0cn2e.rr5.jgrahn-nntq@frailea.sa.invalid>
	<cu9usa$180$1@swifty.westend.com> <8665128pkv.fsf@guru.mired.org>
Message-ID: <cubtr4$1nh$1@panix2.panix.com>

In article <8665128pkv.fsf at guru.mired.org>, Mike Meyer  <mwm at mired.org> wrote:
>
>COM is dominant on Windows because MS pushes it. CORBA isn't dominant
>on Unix because there are a slew of extensible/embeddable languages to
>pick from instead - assuming the apps in question came up with a
>solution better than rolling their own. See <URL:
>http://www.mired.org:8080/home/mwm/scripting/ > for my thoughts on the
>matter before I learned better.

"Unable to connect to host"
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From brown at esteem.com  Wed Feb  9 12:18:51 2005
From: brown at esteem.com (Tom Brown)
Date: Wed, 9 Feb 2005 09:18:51 -0800
Subject: win32 service and sockets
In-Reply-To: <200502081641.37483.brown@esteem.com>
References: <200502081641.37483.brown@esteem.com>
Message-ID: <200502090918.51709.brown@esteem.com>

On Tuesday 08 February 2005 16:41, Tom Brown wrote:
> Hi,
>
> I created a win32 service for XPPro called N4010ATestService.py (see
> below). The service runs as a particular user with administrative rights.
> It starts a thread that creates a simple socket server
> (N4010ASocketServer.py -- also below) that just waits for 20 character
> string. When I run the socket server by itself the test client can connect
> to the server and send a 20 character string just fine. When I run the
> service, the server will bind to the port but the client cannot connect. I
> verified the server was listening on the given port using netstat -an. The
> client eventually times out. Why isn't the server accepting connections
> when run in a service?
>
> Thanks,
> Tom
>

Well, I have found that it works if I launch the client on the same machine as 
the service. It will not work from a remote machine. Any ideas?

Thanks,
Tom


From tzot at sil-tec.gr  Tue Feb 22 05:27:41 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Tue, 22 Feb 2005 12:27:41 +0200
Subject: Memory Based File Objects
References: <f11c8440.0502220206.56d908ce@posting.google.com>
Message-ID: <c72m11966vpk6si4creicn6bg8dnu5p12a@4ax.com>

On 22 Feb 2005 02:06:52 -0800, rumours say that michael.bierenfeld at web.de
(michael) might have written:

<snip of unimportant image manipulation>

>The Image
>Documentation says that file object just has to implement seek, tell
>and write. Does anybody have an example how to do that or maybe a
>snipplet for an "In Memory" File Object with an unknown size.

You probably need the StringIO (or cStringIO) module.  Check the module
reference.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From mfranklin1 at gatwick.westerngeco.slb.com  Thu Feb  3 06:07:48 2005
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Thu, 03 Feb 2005 11:07:48 +0000
Subject: convert ftp.retrbinary to file object? - Python language lacks
 expression?
In-Reply-To: <19804fd8.0502030208.10ace31e@posting.google.com>
References: <19804fd8.0502030208.10ace31e@posting.google.com>
Message-ID: <ctt0l1$o66$1@sea.gmane.org>

Robert wrote:
> I just tried to convert a (hugh size) ftp.retrbinary run into a
> pseudo-file object with .read(bytes) method in order to not consume
> 500MB on a copy operation.
> 
> First I thought, its easy as usual with python using something like
> 'yield' or so.
> 
> Yet I didn't manage to do (without using threads or rewriting
> 'retrbinary')? Any ideas?
> 
> #### I tried a pattern like:
>     .... 
>     def open(self,ftppath,mode='rb'):
>         class FTPFile: #TODO
>             ...
>             def iter_retr()
>                 ...
>                 def callback(blk):
>                     how-to-yield-from-here-to-iter_retr blk???
>                 ftp.retrbinary("RETR %s" % relpath,callback)
>             def read(self, bytes=-1):
>                 ... 
>                 self.buf+=self.iter.next()
>             ...
>         ....


Hmmmm this is nearly there I think...:

import ftplib

class TransferAbort(Exception): pass

class FTPFile:
     def __init__(self, server, filename):
         self.server = server
         self.filename = filename
         self.offset = 0

     def callback(self, data):
         self.offset = self.offset + len(data)
         self.data = data
         ## now quit the RETR command?
         raise TransferAbort("stop right now")

     def read(self, amount):
         self.ftp = ftplib.FTP(self.server)
         self.ftp.login()
         try:
             self.ftp.retrbinary("RETR %s" %self.filename, self.callback,
                 blocksize=amount,
                 rest=self.offset)
         except TransferAbort:
             return self.data


f = FTPFile("HOSTNAME", "FILENAME")

print f.read(24)
print f.read(24)


I open the ftp connection inside the read method as it caused an error 
(on the second call to read) when I opened it in  __init__ ???

HTH
Martin




From richie at entrian.com  Thu Feb  3 06:44:21 2005
From: richie at entrian.com (Richie Hindle)
Date: Thu, 03 Feb 2005 11:44:21 +0000
Subject: IDLE history, Python IDE, and Interactive Python with Vim
In-Reply-To: <opsllommgvb1cml1@ashot>
References: <opsllommgvb1cml1@ashot>
Message-ID: <fj340118qocq0alkm07kf3ihhtv29tur1p@4ax.com>


[Ashot]
> I have been frustrated for quite some time with a lack of a history  
> command in IDLE

To recall a line from your history in IDLE, cursor up to that line and hit
Enter.

> I've tried something called pyCrust, but this too didn't have history

To recall a line from your history in PyCrust, press Ctrl+UpArrow.

-- 
Richie Hindle
richie at entrian.com



From plb at iotk.com  Tue Feb  8 08:08:26 2005
From: plb at iotk.com (plb)
Date: 8 Feb 2005 05:08:26 -0800
Subject: Handling import conflicts when module has the same name as a
	library module that it needs to import?
Message-ID: <1107866095.314395.251150@z14g2000cwz.googlegroups.com>

All:

I am struggling with an import problem...

In my package, myapp, there is a module called logging. This module,
naturally, imports the standard library module logging.  However, when
I try 'import myapp.logging', the 'import logging' statement appears to
be finding the myapp.logging module instead of the one in the standard
library.

How can I ensure that my logging module doesn't try to import itself?

--PLB



From farcepest at gmail.com  Fri Feb 25 13:35:00 2005
From: farcepest at gmail.com (Andy Dustman)
Date: 25 Feb 2005 10:35:00 -0800
Subject: Trouble with mysql-python 1.2.0 on Solaris 8 sparc
In-Reply-To: <1109255132.541839.207530@o13g2000cwo.googlegroups.com>
References: <1108755202.574729.293610@g14g2000cwa.googlegroups.com>
	<1108925639.345790.230510@c13g2000cwb.googlegroups.com>
	<1109255132.541839.207530@o13g2000cwo.googlegroups.com>
Message-ID: <1109356500.327655.279600@z14g2000cwz.googlegroups.com>

What happens when you try to connect? Be sure to check /etc/hosts.allow
and .deny on the server, if your server is compiled with TCP wrapper
support.



From FBatista at uniFON.com.ar  Wed Feb  9 08:53:45 2005
From: FBatista at uniFON.com.ar (Batista, Facundo)
Date: Wed, 9 Feb 2005 10:53:45 -0300 
Subject: Big development in the GUI realm
Message-ID: <A128D751272CD411BC9200508BC2194D053C7F7F@escpl.tcp.com.ar>

[Carlos Ribeiro]

#- 'onegui' to rule them all...

I would really love to use a GUI made by elves...

.    Facundo

Bit?cora De Vuelo: http://www.taniquetil.com.ar/plog
PyAr - Python Argentina: http://pyar.decode.com.ar/


  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
ADVERTENCIA.

La informaci?n contenida en este mensaje y cualquier archivo anexo al mismo,
son para uso exclusivo del destinatario y pueden contener informaci?n
confidencial o propietaria, cuya divulgaci?n es sancionada por la ley.
Si Ud. No es uno de los destinatarios consignados o la persona responsable
de hacer llegar este mensaje a los destinatarios consignados, no est?
autorizado a divulgar, copiar, distribuir o retener informaci?n (o parte de
ella) contenida en este mensaje. Por favor notif?quenos respondiendo al
remitente, borre el mensaje original y borre las copias (impresas o grabadas
en cualquier medio magn?tico) que pueda haber realizado del mismo.
Todas las opiniones contenidas en este mail son propias del autor del
mensaje y no necesariamente coinciden con las de Telef?nica Comunicaciones
Personales S.A. o alguna empresa asociada.
Los mensajes electr?nicos pueden ser alterados, motivo por el cual
Telef?nica Comunicaciones Personales S.A. no aceptar? ninguna obligaci?n
cualquiera sea el resultante de este mensaje.
Muchas Gracias.
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From rbt at athop1.ath.vt.edu  Tue Feb 22 11:31:16 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Tue, 22 Feb 2005 11:31:16 -0500
Subject: searching pdf files for certain info
In-Reply-To: <mailman.2937.1109088725.22381.python-list@python.org>
References: <cvfdgg$fr0$1@solaris.cc.vt.edu>
	<cvfg5a$6g6$1@news.mch.sbs.de>	<cvfhe5$lcv$1@solaris.cc.vt.edu>
	<cvfi2q$dto$1@news.mch.sbs.de>	<cvfk26$qb3$1@solaris.cc.vt.edu>
	<mailman.2937.1109088725.22381.python-list@python.org>
Message-ID: <cvfmok$11l$1@solaris.cc.vt.edu>

Tom Willis wrote:
> I tried that for something not python related and I was getting
> sporadic spaces everywhere.
> 
> I am assuming this is not the case in your experience?
> 
> 
> On Tue, 22 Feb 2005 10:45:09 -0500, rbt <rbt at athop1.ath.vt.edu> wrote:
> 
>>Andreas Lobinger wrote:
>>
>>>Aloha,
>>>
>>>rbt wrote:
>>>
>>>
>>>>Thanks guys... what if I convert it to PS via printing it to a file or
>>>>something? Would that make it easier to work with?
>>>
>>>
>>>Not really...
>>>The classical PS Drivers (f.e. Acroread4-Unix print-> ps) simply
>>>define the pdf graphics and text operators as PS commands and
>>>copy the pdf content directly.
>>>
>>>Wishing a happy day
>>>    LOBI
>>
>>I downloaded ghostscript for Win32 and added it to my PATH
>>(C:\gs\gs8.15\lib AND C:\gs\gs8.15\bin). I found that ps2ascii works
>>well on PDF files and it's entirely free.
>>
>>Usage:
>>
>>ps2ascii PDF_file.pdf > ASCII_file.txt
>>
>>However, bundling a 9+ MB package with a 5K script and convincing users
>>to install it is another matter altogether.
>>--
>>http://mail.python.org/mailman/listinfo/python-list
>>
> 
> 
> 

For my purpose, it works fine. I'm searching for certain strings that 
might be in the document... all I need is a readable file. Layout, fonts 
and/or presentation is unimportant to me.


From ashot at removemolsoftthis.com  Thu Feb  3 19:37:09 2005
From: ashot at removemolsoftthis.com (Ashot)
Date: Thu, 03 Feb 2005 18:37:09 -0600
Subject: IPython colors in windows
Message-ID: <opslndb7l9ej1m1c@ashot>

I am using IPython in windows and the LightBG setting doesn't correctly  
because the background of the text is black even if the console background  
is white.  Anyone know whats going on?  Thanks.

-- 
==============================
Ashot Petrosian
University of Texas at Austin, Computer Sciences
(views expressed are solely my own)
==============================


From fperez.net at gmail.com  Tue Feb  8 00:14:24 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Mon, 07 Feb 2005 22:14:24 -0700
Subject: IDLE history, Python IDE, and Interactive Python with Vim
References: <opsllommgvb1cml1@ashot>
	<mailman.1983.1107626882.22381.python-list@python.org>
	<opsltet5kmej1m1c@ashot>
Message-ID: <cu9hpc$8jk$1@sea.gmane.org>

Ashot wrote:

> yup, this is why I've been using it, its (almost exactly :) what I was looking
> for.  I had tried it before, but was reluctant to use it because the windows
> terminal is not very appealing. Some things I've noticed so far that I think
> could be improved, some of which are minor but annoying:

I should note that I hardly use %edit myself, it's something that was added at
the request of users, and is an OK facility for quick and dirty work.  But
getting such a system to work reliably in all cases, with the
import/execfile/reload issues at play, is really not easy.  Especially because
it's not even completely clear what the 'right' behaviour should be.  %edit
makes a few educated guesses, but that's it.

My personal coding environment consists of a permanently open editor with
multiple files open (XEmacs in my case), and an ipython session open.  In
ipython, I use %run to run test code, and when said top-level test code relies
on modules which are also being changed, I simply put into the top-level
scripts reload() statements.  This gives me the ipython tracebacks,
experimentation, tab-exploration of objects, etc, while I have the full power
of Xemacs for the real editing work.

IPython is NOT an IDE, so I think it's important to understand its limitations
to make the best possible use of it.  Perhaps I haven't done a very good job of
outlining this to users, I don't know.

> edit doesn't work with classes even though it says it should, you have to
> point it to a function in the class (perhaps only in windows)
> 
> under windows vim/gvim doesn't jump to the line of the function.. you said
> that this should work in vi, but I'm guessing its a Windows thing

Works for jed/vim under linux, that's about as much as I know.  Probably a win32
thing, as you say.

> **the biggest problem for me is edit forgets code  in which there were errors.
> for example:"ed" type some nonsense, and ed -p doesn't remember.  Thats
> putting an awful lot of pressure on getting the syntax right everytime =] 
> Perhaps I am missing something here?

Fixed.  Will be in the next release, which will probably come out soon (I found
an unrelated crash case, and I consider crashes release-triggering bugfixes).

> it would be really great if the code executed on save rather than exit, but
> I'm not sure if this is possible.  This would be very useful for people using
> an editor not in the console.. that way you wouldn't have to keep
> opening/closing new editor windows.

not possible in a cross-platform, cross-editor way.

> this isn't a big deal, but it would be nice if there was an easy way to refer
> to the entire history (for edit/save/etc)

%hist has options to print as many lines as you want.  And the %log* commands
will dump all of your history straight to a file, and continue recording from
then on.

> would be nice if you could send stuff to the clipboard.

Do you have a linux/OSX/win32 way to do it?  If so, I'll gladly include it. 
Under *nix, mouse-highlighting copies to the X11 primary selection, which I can
then paste anywhere with the middle button.

> There are a few other things I'm probably forgetting, but having said all
> that, I've come off a little negative here.  I really like IPython so far, its
> got all the things I was looking for, thank you very much for your work.  If I
> have the time in the future I would definately contribute to this project.

No problem, I appreciate the comments.  Fair, honest criticism can only make a
project better.  Note, however, that I _strongly_ suggest you post this kind of
stuff on the ipython list.  While I monitor c.l.py via gmane, I'm not
subscribed and sometimes I'm too busy to read it for weeks at a time, so
there's a very good chance I'll simply miss ipython-related posts here.  The
ipython lists, on the other hand, I keep a close eye on :)

Best,

f



From mahs at telcopartners.com  Thu Feb 17 17:01:14 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 17 Feb 2005 14:01:14 -0800
Subject: How to wrap a class's methods?
In-Reply-To: <20050217194911.GF2366@grulic.org.ar>
References: <4214f167$0$44618$a1866201@visi.com>
	<20050217194911.GF2366@grulic.org.ar>
Message-ID: <cv341q$u17$1@sea.gmane.org>

John Lenton wrote:
> On Thu, Feb 17, 2005 at 07:32:55PM +0000, Grant Edwards wrote:


> 
> I'd usually put big fat warnings around this code, and explain exaclty
> why I need to do things this way...
> 
> 

As a low-tech alternative, what about sourcecode generation, since you are 
targetting a python module?  This gives two advantages vs the wrapping function: 
1) the magic all occurs at coding time 2) the method signatures are documented.

Michael

import imaplib
import inspect
import types
instancemethod = types.MethodType

# The function template
funcwrapper = \
"""
     def %(name)s%(argspec)s:
         s,r = imaplib.IMAP4_SSL.%(name)s%(callspec)s
         if s!='OK':
             raise NotOK((s,r))
         return r"""

# A helper function to get the template parameters
def getargs(method):
     argspec = inspect.getargspec(method)
     callspec = tuple(argspec[:3] + (None,))# No default

     return {"name": method.__name__,
             "argspec": inspect.formatargspec(*argspec),
             "callspec": inspect.formatargspec(*callspec)}

# Do the stuff manually:
  >>> obj = imaplib.IMAP4_SSL
  >>> attrnames = [meth for meth in dir(imaplib.IMAP4_SSL) if not 
meth.startswith("_")]
  >>> attributes = [getattr(obj, attrname) for attrname in attrnames]
  >>> methods = [attribute for attribute in attributes if 
inspect.ismethod(attribute)]
  >>> print  "\n".join(funcwrapper % getargs(method) for method in methods)

     def append(self, mailbox, flags, date_time, message):
         s,r = imaplib.IMAP4_SSL.append(self, mailbox, flags, date_time, message)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def authenticate(self, mechanism, authobject):
         s,r = imaplib.IMAP4_SSL.authenticate(self, mechanism, authobject)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def check(self):
         s,r = imaplib.IMAP4_SSL.check(self)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def close(self):
         s,r = imaplib.IMAP4_SSL.close(self)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def copy(self, message_set, new_mailbox):
         s,r = imaplib.IMAP4_SSL.copy(self, message_set, new_mailbox)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def create(self, mailbox):
         s,r = imaplib.IMAP4_SSL.create(self, mailbox)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def delete(self, mailbox):
         s,r = imaplib.IMAP4_SSL.delete(self, mailbox)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def deleteacl(self, mailbox, who):
         s,r = imaplib.IMAP4_SSL.deleteacl(self, mailbox, who)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def expunge(self):
         s,r = imaplib.IMAP4_SSL.expunge(self)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def fetch(self, message_set, message_parts):
         s,r = imaplib.IMAP4_SSL.fetch(self, message_set, message_parts)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def getacl(self, mailbox):
         s,r = imaplib.IMAP4_SSL.getacl(self, mailbox)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def getquota(self, root):
         s,r = imaplib.IMAP4_SSL.getquota(self, root)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def getquotaroot(self, mailbox):
         s,r = imaplib.IMAP4_SSL.getquotaroot(self, mailbox)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def list(self, directory='""', pattern='*'):
         s,r = imaplib.IMAP4_SSL.list(self, directory, pattern)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def login(self, user, password):
         s,r = imaplib.IMAP4_SSL.login(self, user, password)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def login_cram_md5(self, user, password):
         s,r = imaplib.IMAP4_SSL.login_cram_md5(self, user, password)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def logout(self):
         s,r = imaplib.IMAP4_SSL.logout(self)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def lsub(self, directory='""', pattern='*'):
         s,r = imaplib.IMAP4_SSL.lsub(self, directory, pattern)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def myrights(self, mailbox):
         s,r = imaplib.IMAP4_SSL.myrights(self, mailbox)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def namespace(self):
         s,r = imaplib.IMAP4_SSL.namespace(self)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def noop(self):
         s,r = imaplib.IMAP4_SSL.noop(self)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def open(self, host='', port=993):
         s,r = imaplib.IMAP4_SSL.open(self, host, port)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def partial(self, message_num, message_part, start, length):
         s,r = imaplib.IMAP4_SSL.partial(self, message_num, message_part, start, 
length)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def print_log(self):
         s,r = imaplib.IMAP4_SSL.print_log(self)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def proxyauth(self, user):
         s,r = imaplib.IMAP4_SSL.proxyauth(self, user)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def read(self, size):
         s,r = imaplib.IMAP4_SSL.read(self, size)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def readline(self):
         s,r = imaplib.IMAP4_SSL.readline(self)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def recent(self):
         s,r = imaplib.IMAP4_SSL.recent(self)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def rename(self, oldmailbox, newmailbox):
         s,r = imaplib.IMAP4_SSL.rename(self, oldmailbox, newmailbox)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def response(self, code):
         s,r = imaplib.IMAP4_SSL.response(self, code)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def search(self, charset, *criteria):
         s,r = imaplib.IMAP4_SSL.search(self, charset, *criteria)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def select(self, mailbox='INBOX', readonly=None):
         s,r = imaplib.IMAP4_SSL.select(self, mailbox, readonly)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def send(self, data):
         s,r = imaplib.IMAP4_SSL.send(self, data)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def setacl(self, mailbox, who, what):
         s,r = imaplib.IMAP4_SSL.setacl(self, mailbox, who, what)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def setquota(self, root, limits):
         s,r = imaplib.IMAP4_SSL.setquota(self, root, limits)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def shutdown(self):
         s,r = imaplib.IMAP4_SSL.shutdown(self)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def socket(self):
         s,r = imaplib.IMAP4_SSL.socket(self)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def sort(self, sort_criteria, charset, *search_criteria):
         s,r = imaplib.IMAP4_SSL.sort(self, sort_criteria, charset, 
*search_criteria)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def ssl(self):
         s,r = imaplib.IMAP4_SSL.ssl(self)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def status(self, mailbox, names):
         s,r = imaplib.IMAP4_SSL.status(self, mailbox, names)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def store(self, message_set, command, flags):
         s,r = imaplib.IMAP4_SSL.store(self, message_set, command, flags)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def subscribe(self, mailbox):
         s,r = imaplib.IMAP4_SSL.subscribe(self, mailbox)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def thread(self, threading_algorithm, charset, *search_criteria):
         s,r = imaplib.IMAP4_SSL.thread(self, threading_algorithm, charset, 
*search_criteria)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def uid(self, command, *args):
         s,r = imaplib.IMAP4_SSL.uid(self, command, *args)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def unsubscribe(self, mailbox):
         s,r = imaplib.IMAP4_SSL.unsubscribe(self, mailbox)
         if s!='OK':
             raise NotOK((s,r))
         return r

     def xatom(self, name, *args):
         s,r = imaplib.IMAP4_SSL.xatom(self, name, *args)
         if s!='OK':
             raise NotOK((s,r))
         return r
  >>>



From steve at myplace.com  Sun Feb 20 20:04:00 2005
From: steve at myplace.com (Steve M)
Date: Sun, 20 Feb 2005 19:04:00 -0600
Subject: Tuple index
Message-ID: <cvbcc6$b5f$1@news.netins.net>

Hello,

        I'm trying to figure out the index position of a tuple member. 
I know the member name, but I need to know the members index position. I
know that if I use the statement print tuple[4] that it will print the
contents of that location. What I don't understand is if I know that foo is
a member of tuple, how do I get foo's index position.
Thanks-in-Advance
Steve


From cam.ac.uk at mh391.invalid  Mon Feb 14 04:54:17 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Mon, 14 Feb 2005 09:54:17 +0000
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cuprg2$6rt$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108370491.792820.142200@z14g2000cwz.googlegroups.com>
	<cuprg2$6rt$1@usenet.otenet.gr>
Message-ID: <cupsgb$lem$1@gemini.csx.cam.ac.uk>

Ilias Lazaridis wrote:

> "The Python Foundation could create an official sub-project to create an 
> automated build target based on the MinGW toolchain. I am sure that many 
> community members would be more than happy to contribute."

An "official sub-project" for something like this is not necessary. Identify
what needs to be done and create a patch, and it will be accepted if it is
a good patch.
-- 
Michael Hoffman


From jeff at ccvcorp.com  Wed Feb 16 14:19:28 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Wed, 16 Feb 2005 11:19:28 -0800
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <37hippF4gcimiU1@individual.net>
References: <37hippF4gcimiU1@individual.net>
Message-ID: <111773qkev2r045@corp.supernews.com>

Leo Breebaart wrote:

> What I can't find an explanation for is why str.join() doesn't
> automatically call str() on its arguments [...]

> [...] Presumably there is some
> counter-argument involved, some reason why people preferred the
> existing semantics after all. But for the life of me I can't
> think what that counter-argument might be...

One possibility I can think of would be Unicode.  I don't think that 
implicitly calling str() on Unicode strings is desirable.  (But then 
again, I know embarrassingly little about unicode, so this may or may 
not be a valid concern.)

Of course, one could ensure that unicode.join() used unicode() and 
str.join() used str(), but I can conceive of the possibility of 
wanting to use a plain-string separator to join a list that might 
include unicode strings.  Whether this is a realistic use-case is, of 
course, a completely different question...

Jeff Shannon
Technician/Programmer
Credit International



From softpro at gmx.net  Sun Feb  6 08:06:43 2005
From: softpro at gmx.net (Johannes Ahl-mann)
Date: Sun, 6 Feb 2005 14:06:43 +0100
Subject: bad generator performance
References: <mailman.2008.1107662630.22381.python-list@python.org>
Message-ID: <cu54p3$mal$05$1@news.t-online.com>

> Um. Under my definition of "recursion", you haven't really removed
> recursion in the generator version. That is, you're still calling the
> depthFirstIterator method upon each iteration--you've just changed from
> list-concatenation to yielding instead, which trades off list-management
> overhead for closure-maintenance overhead. 
yup, i am aware that my generator version is also recursive. but what i
thought this would do is "generate" a lazy list of return values (in
theory at least).
but this still doesn't explain why the yielding is so much slower than
the list concatenation!

> A truly non-recursive
> implementation would probably exist outside of whatever class you've got
> this method in, and would keep its own pointer to the current node as it
> traversed the tree.


i loved the generator solution because it was short, concise and lazy,
but if i am going to write the closure/continuation/recursion handling
manually i'd rather go with the memory-consuming list concatenation...
a non-recursive solution to traversing a recursive data type is bound to
get ugly, isn't it?

i just wondered if there was a concise, clean way of doing this with
generators which i had overlooked, or whether there was some blatant
mistake in my code.

thx,

Johannes


From stonis at hotmail.com  Wed Feb  2 04:28:46 2005
From: stonis at hotmail.com (Christian)
Date: Wed, 02 Feb 2005 10:28:46 +0100
Subject: Apache & Python 500 Error
Message-ID: <36bkqfF4sjt0oU1@individual.net>

Hello,

i have an apache 1.3 server with python on debian. Python works fine but 
  the scripts wont?t work.

This easy script i want to do on apache:

#!/usr/bin/python
import os
os.getcwd()

in apache config i have done this:

<Directory /var/www/python>
     AddHandler python-program .py
     PythonHandler python
     Order allow,deny
     Allow from all
     #PythonDebug On
</Directory>

the script is in this directory /var/www/python

but i get an 500 error everytime, with "every" script - why that - i?m 
newbie - sorry for that :)

greetings from germany to newsgroup
christian


From ed-no at spam-eepatents.com  Fri Feb 25 02:08:37 2005
From: ed-no at spam-eepatents.com (Ed Suominen)
Date: Thu, 24 Feb 2005 23:08:37 -0800
Subject: Nevow examples
References: <mailman.3026.1109289153.22381.python-list@python.org>
Message-ID: <0q-dndxAyMV4U4PfRVn-vw@centurytel.net>

Travis, that's a very nice use of Nevow. I'm going to look into using it for
documenting my own stuff.

Here's another example, my boss's web site, which uses Twisted/Nevow to
implement virtual hosting, dynamic image generation with caching,
dynamically-updated parsing of a site-wide config file that determines
almost all the layout you see, and dynamic mark-up generation with
restructured-text parsing of plain text source files.

http://valuablepatents.com

A static vhost run under the same Twisted/Nevow server is at
http://eepatents.com.

I make new servers by simply adding a DNS entry in BIND and then making a
new directory in /var/www/ with a site.conf file in it if it's dynamic, or
just with static files if it's static, or with a side.mod file if it the
vhost's root resource is generated from a named module imported
from /var/www/_modules/.

I will be providing a release and possibly read-only public access to the
SVN repository for the underlying code soon. It will be distributed under
the LGPL.

---
Ed Suominen
Registered Patent Agent
Open-Source Software Author (yes, both...)
Web Site: http://www.eepatents.com

Travis Oliphant wrote:

> 
> There was a request for nevow examples.  Nevow is a fantastic
> web-development framework for Python.
> 
> I used nevow to create http://www.scipy.org/livedocs/
> 
> This site uses nevow and self introspection to produce (live)
> documentation for scipy based on the internal docstrings.   It would be
> nice to add the capability for users to update the documentation through
> the web-site.  But, that functionality is not complete.
> 
> The code itself is available in the util directory of scipy which can be
> checked out of CVS (or browsed).  Go to http://www.scipy.org  for mor
> details.
> 
> -Travis Oliphant



From peter at somewhere.com  Tue Feb 15 10:31:12 2005
From: peter at somewhere.com (Peter Maas)
Date: Tue, 15 Feb 2005 16:31:12 +0100
Subject: replacing ASP/VBScript with Python
In-Reply-To: <cusnon$qhd$1@swifty.westend.com>
References: <cusnon$qhd$1@swifty.westend.com>
Message-ID: <cusq6o$t30$1@swifty.westend.com>

Peter Maas schrieb:
> I have inherited an extremely messy ASP/VBScript application which
> is a pain for me to support. Now the customer is thinking about a
> redesign. I'd like to rewrite the whole thing in Python but the app
> has to meet some conditions like
[...]

Just noticed that this posting doesn't contain any questions. Here
they are:

Any comments? Has anybody done something comparable successfully and
give some advice?

Thanks in advance.

:)

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From ggrp1.20.martineau at dfgh.net  Tue Feb 22 05:53:13 2005
From: ggrp1.20.martineau at dfgh.net (Martin Miller)
Date: 22 Feb 2005 02:53:13 -0800
Subject: Test for structure
References: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
	<mailman.2824.1108792560.22381.python-list@python.org>
	<1108937287.079367.276910@g14g2000cwa.googlegroups.com>
	<HIqdnYQVyeBCjYTfRVn-oQ@comcast.com>
	<1109012415.692798.185750@l41g2000cwc.googlegroups.com>
	<1109068655.648301.178740@g14g2000cwa.googlegroups.com>
Message-ID: <1109069593.265566.170340@o13g2000cwo.googlegroups.com>

Nope, that isn't right either, in the sense that it handles all the
cases properly, including "single string" vs "list of strings'. Guess
this overly simplistic aslist() does not work after. I should have been
more suspicious and cautious before posting. Sorry.

Martin



From steven.bethard at gmail.com  Fri Feb 18 13:58:00 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 18 Feb 2005 11:58:00 -0700
Subject: duplicate docstrings
Message-ID: <R5mdnTmEiaIop4vfRVn-hw@comcast.com>

I have two classes that implement the same interface, e.g. something like:

class C(object):
     def foo(self):
         """Foo things"""
         ...
     def bar(self):
         """Bar things"""
         ...
     def baz(self):
         """Baz things in a C manner"""
         ...

class D(object):
     def foo(self):
         """Foo things"""
         ...
     def bar(self):
         """Bar things"""
         ...
     def baz(self):
         """Baz things in a D manner"""
         ...

It bothers me that I'm basically writing the same docstrings multiple 
times.  I guess what I really want to do is just write the docstrings 
for the interface I'm describing, and only supply docstrings in the 
classes when they need to differ from the interface docstrings.

Is there a good way to do this?  If it's necessary, I can have C and D 
inherit from another class...

STeVe


From pippo at tin.it  Fri Feb 11 18:22:01 2005
From: pippo at tin.it (marco)
Date: Sat, 12 Feb 2005 00:22:01 +0100
Subject: check if object is number
In-Reply-To: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
Message-ID: <374t0mF4te5vbU1@individual.net>

Steven Bethard wrote:
> Is there a good way to determine if an object is a numeric type? 
.
.
.
> 
> Ideas?
Maybe this can help?

def isnumber(x):
     try:
         return(x == x-0)
     except:
         return False

print '1:\t', isnumber(1)
print '1.25:\t', isnumber(1.25)
print '1.0 / 7:\t', isnumber(1.0 / 7)
print '1+0j:\t', isnumber((1+0j))
print '"spam":\t', isnumber("spam")

output:

1:	True
1.25:	True
1.0/7:	True
1+0j:	True
"spam":	False

Ooops! While checking other posts I realized that this is almost the 
same as Dan Bishop's solution.

Marco


From caleb1 at telkomsa.net  Thu Feb  3 23:28:45 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Thu, 03 Feb 2005 23:28:45 -0500
Subject: Two classes problem
References: <mailman.1768.1107369788.22381.python-list@python.org>
	<opsllpombg1js0xs@news.telkomsa.net>
	<mailman.1795.1107409780.22381.python-list@python.org>
Message-ID: <opslnn17lr1js0xs@news.telkomsa.net>

Gurpreet

You can manage the namespace more formally. Or to put it another way,  
"global" gives me the heebie-jeebies.  I recently worked on a project  
replacing a legacy reactor model in FORTRAN, and between COMMON blocks,  
and GOTO statements, I didn't know up from down.

How about this:

***
class a:
       def __init__(self,test):
              localtest = test
              # do stuff with localtest
       def givetest(self):
              return localtest
       def printtest(self):
              print localtest

test = 'Starting text'
print 'Outside before class: '+test
my_a = a(test)
test = my_a.givetest()
print 'Outside after class: '+test
***

So here we explicitly pass "test" into the class, do stuff with it, and  
rewrite test again with a method.  Does this satisfy the technical problem?

regards
Caleb




On Thu, 3 Feb 2005 11:19:34 +0530, Gurpreet Sachdeva  
<gurpreet.sachdeva at gmail.com> wrote:

> The purpose is, I pass a list to a class in a module but I want to use
> that list out of the scope of that class and that too not in any other
> class or a function but in the main program...
> The problem is that when I import that, the statements in the module
> which are not in the class are executed first and then the variable
> gets intiallised...
> I will explain with the example...
>
> -global test
> -
> -class a:
> -        def __init__(self,test):
> -                global test
> -                print test
> -
> -print 'Outside: '+test
>
> I want to print that variable test which I am giving to the class as
> an argument, in the scope of main...
> I know it is not a good way of programming but my situation is like  
> this...
> But is this possible or not? If I pass test as 'Garry' can I (by any
> way) print 'Outside: Garry' with that print statement... (in the main
> scope)
>
> Thanks and Regards,
> Garry



From ola.natvig at infosense.no  Wed Feb 16 04:33:05 2005
From: ola.natvig at infosense.no (Ola Natvig)
Date: Wed, 16 Feb 2005 10:33:05 +0100
Subject: super not working in __del__  ?
In-Reply-To: <Xns95FF5DA14D6F0duncanrcpcouk@127.0.0.1>
References: <cuu0pu$t44$1@sea.gmane.org>
	<mailman.2678.1108537188.22381.python-list@python.org>
	<Xns95FF5DA14D6F0duncanrcpcouk@127.0.0.1>
Message-ID: <hjgbe2-vqe.ln1@pluto.i.infosense.no>

Duncan Booth wrote:
> Fredrik Lundh wrote:
> 
> 
>>in this case,
>>
>>  def __del__(self):
>>    super(self.__class__, self).__del__()
>>
>>should do the trick.
> 
> 
> Only if nobody ever tries to subclass your class, and if they aren't going 
> to subclass it why bother to use super in the first place.
> 
> 
>>>>class Base(object):
> 
> 	def __del__(self):

There should be a super(self.__class__, self)._del__() here if I'm not 
totaly wong, which could be the case here ;)


> 		print "Base.__del__"
> 
> 		

-- 
--------------------------------------
  Ola Natvig <ola.natvig at infosense.no>
  infoSense AS / development


From chrisonleadguitar at yahoo.com  Tue Feb  1 21:56:20 2005
From: chrisonleadguitar at yahoo.com (Chris Jameyson)
Date: Tue, 1 Feb 2005 18:56:20 -0800 (PST)
Subject: Python checkin driver version on windows
Message-ID: <20050202025620.34269.qmail@web30808.mail.mud.yahoo.com>

Is there a way to check driver version information on windows through
Python?  

I'd like to pull driver version, digital sig from the same place that
'device manager' gets it's information.


I tried using file system object, but seems like GetFileVersion()
from version.dll only extracts versions for .dll and .exe.  I need
something so I can check .sys files.

Thanks in advance.


		
__________________________________ 
Do you Yahoo!? 
Read only the mail you want - Yahoo! Mail SpamGuard. 
http://promotions.yahoo.com/new_mail 


From firemoth at gmail.com  Tue Feb  1 16:47:04 2005
From: firemoth at gmail.com (Timothy Fitz)
Date: Tue, 1 Feb 2005 16:47:04 -0500
Subject: Where are list methods documented?
In-Reply-To: <972ec5bd05020110061ce0575c@mail.gmail.com>
References: <41ffba7d$0$15879$a1866201@visi.com>
	<1f7befae050201093732daefb2@mail.gmail.com>
	<972ec5bd05020110061ce0575c@mail.gmail.com>
Message-ID: <972ec5bd05020113472f781f1d@mail.gmail.com>

[Tim Peters]
> The methods on mutable sequence types are documented in the Library
> manual's section on mutable sequence types:
>
>    http://docs.python.org/lib/typesseq-mutable.html
>
 
And like -many- python programmers, when he thinks "List" he doesn't
immediately think "Mutable Sequence Type." The title should stay but
perhaps the tutorial should be updated to point people in the right
direction when they're "done" and need to know specifics? (This link
of the documentation was non-obvious to me also)


From aurora00 at gmail.com  Tue Feb  1 11:49:06 2005
From: aurora00 at gmail.com (aurora)
Date: Tue, 01 Feb 2005 08:49:06 -0800
Subject: Next step after pychecker
References: <41ff0308$0$6503$636a15ce@news.free.fr>
Message-ID: <opsli2b4q16yt6e7@news.cisco.com>

A frequent error I encounter

   try:
     ...do something...
   except IOError:
     log('encounter an error %s line %d' % filename)

Here in the string interpolation I should supply (filename,lineno).  
Usually I have a lot of unittesting to catch syntax error in the main  
code. But it is very difficult to run into exception handler, some of  
those are added defensely. Unfortunately those untested exception  
sometimes fails precisely when we need it for diagnosis information.

pychecker sometime give false alarm. The argument of a string  
interpolation  may be a valid tuple. It would be great it we can somehow  
unit test the exception handler (without building an extensive library of  
mock objects).


From gabriel.cooper at mediapulse.com  Tue Feb  8 09:48:39 2005
From: gabriel.cooper at mediapulse.com (Gabriel Cooper)
Date: Tue, 08 Feb 2005 09:48:39 -0500
Subject: ANN: Zeus Programmers Editor V3.94
In-Reply-To: <4207843C.26FB@zeusedit.com>
References: <4207843C.26FB@zeusedit.com>
Message-ID: <4208D147.5040405@mediapulse.com>


Jussi Jumppanen wrote:

>The latest release of the Zeus for Windows programmer's
>editor is now available.
>
So is this mentioned here on the Python mailing list because Zeus was 
written in Python, or is this just targeted spam for a commerical product?


From jjreavis at gmail.com  Fri Feb  4 13:12:38 2005
From: jjreavis at gmail.com (Jeff  Reavis)
Date: 4 Feb 2005 10:12:38 -0800
Subject: advice needed for simple python web app
In-Reply-To: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
Message-ID: <1107540758.589662.16340@z14g2000cwz.googlegroups.com>

You might also want to try out Spyce.
http://spyce.sourceforge.net/index.html

It works in proxy mode, with mod_python, or even as cgi.

Some examples:
http://spyce.sourceforge.net/eg.html



From ncoghlan at iinet.net.au  Sat Feb  5 04:15:36 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 05 Feb 2005 19:15:36 +1000
Subject: empty classes as c structs?
In-Reply-To: <7rSdne7BcbDeV57fRVn-jg@comcast.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
Message-ID: <42048EB8.2010708@iinet.net.au>

Steven Bethard wrote:
> Yes -- help me rally behind my generic object PEP which proposes a Bunch 
> type (probably to be renamed) for the Python standard lib. =)

Did you see the suggestion of 'namespace' as a name? Given that the idea is to 
get access to the contents using the standard Python syntax for accessing module 
and class namespaces, it seems to make sense.

Michael Spencer also posted an interesting idea recently about setting up a view 
of an existing dictionary, rather than as a separate object:

class attr_view(object):
   def __init__(self, data):
     object.__setattr__(self, "_data", data)
   def __getattr__(self, attrname):
     return self._data[attrname]
   def __setattr__(self, attrname, value):
     self._data[attrname] = value

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From kent37 at tds.net  Fri Feb 25 08:45:16 2005
From: kent37 at tds.net (Kent Johnson)
Date: Fri, 25 Feb 2005 08:45:16 -0500
Subject: split a directory string into a list
In-Reply-To: <1109338583.168229.297760@z14g2000cwz.googlegroups.com>
References: <1109338583.168229.297760@z14g2000cwz.googlegroups.com>
Message-ID: <421f28c1$1_3@newspeer2.tds.net>

porterboy76 at yahoo.com wrote:
> QUESTION:
> 
> How do I split a directory string into a list in Python, eg.
> 
> '/foo/bar/beer/sex/cigarettes/drugs/alcohol/'
> 
> becomes
> 
> ['foo','bar','beer','sex','cigarettes','drugs','alcohol']

  >>> '/foo/bar/beer/sex/cigarettes/drugs/alcohol/'.strip('/').split('/')
['foo', 'bar', 'beer', 'sex', 'cigarettes', 'drugs', 'alcohol']

Kent
> 
> I was looking at the os.path.split command, but it only seems to
> separate the filename from the path (or am I just using it wrong?). I
> don't want to do it manually if I can help it, as there will have to be
> exceptions for the cases where there is (not) a trailing (leading)
> slash, or escape sequences involving /. Is there a built in command for
> this?
> 


From erikbethke at gmail.com  Sun Feb 13 11:05:06 2005
From: erikbethke at gmail.com (Erik  Bethke)
Date: 13 Feb 2005 08:05:06 -0800
Subject: goto, cls, wait commands
In-Reply-To: <cuh6fc$ms2$1@gemini.csx.cam.ac.uk>
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
	<cuh6fc$ms2$1@gemini.csx.cam.ac.uk>
Message-ID: <1108310706.270392.161870@o13g2000cwo.googlegroups.com>

At least I thought this was funny and cool! -Erik



From michele.simionato at gmail.com  Wed Feb 16 10:03:07 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 16 Feb 2005 07:03:07 -0800
Subject: adding new functionality to a function non-intrusively!
In-Reply-To: <1108564620.657526.301320@g14g2000cwa.googlegroups.com>
References: <1108564620.657526.301320@g14g2000cwa.googlegroups.com>
Message-ID: <1108565856.655370.255590@f14g2000cwb.googlegroups.com>

Decorators are your friends. You can wrap a function
and give it additional functionality. For instance just
yesterday I needed to keep track of how many times
a function is called. This can be done with this
decorator:

.def with_counter(f):
.    def wrappedf(*args, **kw):
.        wrappedf.counter += 1
.        return f(*args, **kw)
.    wrappedf.counter = 0
.    wrappedf.func_name = f.func_name
.    return wrappedf

. at with_counter # requires Python 2.4
.def g():
.    print "called"

.print g.counter
.g()
.print g.counter

This is intented just as an appetizer. Look at the
cookbook for more examples.

                  Michele Simionato



From simoninusa2001 at yahoo.co.uk  Sat Feb 12 14:40:04 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 12 Feb 2005 11:40:04 -0800
Subject: ANN: pyMinGW support for Python 2.3.5 (final) is available
References: <1108189500.707806.316520@g14g2000cwa.googlegroups.com>
	<slrnd0rmep.n4l.nick@irishsea.home.craig-wood.com>
Message-ID: <1108237204.920670.213190@f14g2000cwb.googlegroups.com>

[snip]
> Ha anyone tried cross compiling python with mingw?  At work we
compile
> our software for lots of platforms (including windows) on a linux
> build host.  The windows builds are done with a mingw cross compiler.
> It would be interesting if we could do this with python + extensions
> also.

Yes, I was thinking of setting up a cross-compiling system, but why
would you use mingw instead of just gcc on Linux? Only cross-compiling
I've ever done is on RISC OS.

I use VMWare to accomplish a similar goal though, compiling stuff for
old 64Mb P233's running RedHat7 is a lot faster when done on a
1Gb/2.5GHz VMWare machine!

I just finished compiling Qt/PyQt/QScintilla/SIP for Python 2.4 using
MinGW on Windows, and can say that MSVC6 was at least twice as fast,
and required less patching to get it working, plus it's one less DLL
and the binaries are about 20% smaller. I also can't seem to get PyQt
apps working on Win98SE when using the MinGW build (2000 and XP work
fine).

Maybe I'll fork out the 100usd for Visual Studio .NET 2003 after all....



From aleaxit at yahoo.com  Mon Feb  7 14:44:10 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 7 Feb 2005 20:44:10 +0100
Subject: string issue
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
	<36QMd.103084$Jk5.36127@lakeread01>
	<cu0j92$kf7$2@solaris.cc.vt.edu>
	<mailman.1913.1107547130.22381.python-list@python.org>
	<1grl717.1o4ofg7arp8c2N%aleaxit@yahoo.com>
	<36plr5F551pg8U1@individual.net>
Message-ID: <1grmr97.9o27yo1xzwzd7N%aleaxit@yahoo.com>

Reinhold Birkenfeld <reinhold-birkenfeld-nospam at wolke7.net> wrote:
   ...
> > Using ips[:] to make a copy on the fly is very idiomatic, but I've never
> > liked it, personally.  I see no reason to prefer it to the even shorter
> > and arguably less obscure ips*1, for example.
> 
> "Less obscure"? Either you know the `lst[:]' idiom, or you don't. If you
> do, it's fine, if you don't, you will have to look it up to understand
> its meaning, and that's a good thing.

I disagree.

> Using `lst*1', on the other hand, does not make clear that a copy is
> created. If you don't already know what it does, you may assume that
> `lst' is left alone.

And indeed it is -- whatever object is bound to the name 'lst' is not
modified in the least (neither would it be by slicing lst[:], of
course).  But the RESULT of x*1 is a DISTINCT object from x whenever it
matters -- i.e., whenever x is mutable.  x[:] *MIGHT* not be a distinct,
separate, independent copy if x is, e.g. a Numeric.array:

x = Numeric.arange(7)
y = x[:]
x[3]=23

now y is modified too.  Change the middle statement into 'y = x*1', and
the third statement won't alter y.  So, *WHAT ON EARTH* could possibly
make this weird 'x[:]' form preferable to 'x*1'?!  It's MUCH more
obvious that the second one returns an independent, separate object
initially equal to x -- because it does so in many more cases than those
in which x[:] does it!  I'm not arguing FOR x*1 -- I'm arguing AGAINST
x[:] as being even remotely acceptable.

 
> >  My preference is:
> > 
> >   for ip in list(ips):
> 
> That is the most intriguing variant, of course.

It's very down to earth because the result is obviously a list, whatever
'ips' might turn out to be -- no mystery there, and thus, no intrigue.
Maybe we should have a simpler way to specify ``an iterator that is
INDEPENDENT from any possible changes in the iterable we're passing'',
for this specific use case -- but we don't, and I don't think that
copy.copy(ips) is a substantial improvement (it would fail when ips is a
file, or a generator-iterator, or many other kinds of iterators, for
example).  list(ips) may do more work than necessary (e.g., if ips were
a tuple) but at least its semantics are quite plain and obvious.


Alex


From exogen at gmail.com  Fri Feb 18 19:31:16 2005
From: exogen at gmail.com (Brian Beck)
Date: Fri, 18 Feb 2005 19:31:16 -0500
Subject: selecting dictionaries to maximize counts
In-Reply-To: <EfydnY_Xc8WiFYvfRVn-jw@comcast.com>
References: <oPGdnQfZXPnD0YvfRVn-oQ@comcast.com>
	<cv5v18$l9t$1@eeyore.INS.cwru.edu>
	<EfydnY_Xc8WiFYvfRVn-jw@comcast.com>
Message-ID: <cv61i3$pgt$1@eeyore.INS.cwru.edu>

Steven Bethard wrote:
  > Anyway, do you know what name this problem is usually discussed under?
> If I knew what to google for, I could probably find at least a few 
> simple heuristics to try...

I think the closest thing would be the 'knapsack problem' or the 'subset 
sum problem.'

http://en.wikipedia.org/wiki/Subset_sum_problem
http://en.wikipedia.org/wiki/Knapsack_problem

--
Brian Beck
Adventurer of the First Order


From bdesth.quelquechose at free.quelquepart.fr  Sat Feb  5 09:52:49 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 05 Feb 2005 15:52:49 +0100
Subject: who can tell me BASICS of Python
In-Reply-To: <1107588047.020906.321750@g14g2000cwa.googlegroups.com>
References: <1107588047.020906.321750@g14g2000cwa.googlegroups.com>
Message-ID: <4204db7f$0$14112$626a14ce@news.free.fr>

fanweixiao at gmail.com a ?crit :
> I want to know which compiler I can use ... thank you

To compile what ? Python code ? The compiler is in the standard lib.



From timr at probo.com  Thu Feb 17 23:52:28 2005
From: timr at probo.com (Tim Roberts)
Date: Thu, 17 Feb 2005 20:52:28 -0800
Subject: Help needed for to build a CGI shell interface.
References: <mailman.2755.1108644567.22381.python-list@python.org>
	<37jjk4F5eefr4U1@individual.net>
	<4214d128$0$145$fb624d75@newsspool.solnet.ch>
Message-ID: <n2ta11pp03gp23vjpn7981g9fv4i3jmfan@4ax.com>

Slalomsk8er <news at slalomsk8er.ch> wrote:
>
>What do I want to do? I am building an admintool (deamon and client) and 
>for this I need to script a interface to the shell, with the console 
>ansi escape sequences, whitch is fully transparent for the user.

Do you honestly plan to expose a command shell via CGI?  Can you think of a
better way to allow hackers to wreak havoc on your system?
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From skip at pobox.com  Wed Feb  2 11:04:37 2005
From: skip at pobox.com (System Administrator)
Date: Wed, 2 Feb 2005 10:04:37 -0600
Subject: How run valgrind on Python C extensions?
In-Reply-To: <1107324574.108521.183170@z14g2000cwz.googlegroups.com>
References: <1107324574.108521.183170@z14g2000cwz.googlegroups.com>
Message-ID: <16896.64021.313577.542995@montanaro.dyndns.org>


    Chris> I have Python C extensions that are giving me seg faults that I'd
    Chris> like to run valgrind on.

    Chris> Can I use valgrind on these through python??  HOW???

Just run Python under valgrind's control.  It will automatically take care
of it for you.

    Chris> Is it easy or must I do some work like recompiling python source
    Chris> with the -g extension?

Should not be necessary.

Skip


From http  Mon Feb 21 12:42:14 2005
From: http (Paul Rubin)
Date: 21 Feb 2005 09:42:14 -0800
Subject: Unittest - testing properties (read-only attributes)
References: <uu0o5c0br.fsf@yahoo.co.uk>
	<roy-7E7A58.12112821022005@reader2.panix.com>
	<uaKdncr3ppCbhIffRVn-rA@powergate.ca>
	<7xu0o5akr2.fsf@ruckus.brouhaha.com>
	<Xns9604B247481Cduncanrcpcouk@127.0.0.1>
Message-ID: <7x4qg5n72h.fsf@ruckus.brouhaha.com>

Duncan Booth <duncan.booth at invalid.invalid> writes:
> An assignment expression, if such a thing existed wouldn't help here.
> 
> The point being that the expression must be evaluated inside the exception 
> handler in assertRaises, so you either need to delay the evaluation with a 
> lambda, or by passing the function and arguments in separately. If you had 
> an assignment expression it would be roughly equivalent to:
> 
>    self.assertRaises(AttributeError, setattr(self.combat, 'value', 1))
> 
> which will throw the AttributeError instead of passing the test.

Yes.  The example I quoted used an assignment expression inside a
lambda.  The person who posted it, and the person who followed it up
with the setattr alternative, both didn't notice that the assignment
expression wasn't valid Python.  However, my post came out sounding
grumpier than I intended ;).


From deetsNOSPAM at web.de  Fri Feb 25 11:14:24 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 25 Feb 2005 17:14:24 +0100
Subject: Splitting strings - by iterators?
References: <pan.2005.02.25.15.55.31.77881@jeremysanders.net>
Message-ID: <38913oF5mi8arU2@individual.net>

Jeremy Sanders wrote:

> I have a large string containing lines of text separated by '\n'. I'm
> currently using text.splitlines(True) to break the text into lines, and
> I'm iterating over the resulting list.
> 
> This is very slow (when using 400000 lines!). Other than dumping the
> string to a file, and reading it back using the file iterator, is there a
> way to quickly iterate over the lines?
> 
> I tried using newpos=text.find('\n', pos), and returning the chopped text
> text[pos:newpos+1], but this is much slower than splitlines.
> 
> Any ideas?

Maybe [c]StringIO can be of help. I don't know if it's iterator is lazy. But
at least it has one, so you can try and see if it improves performance :)


-- 
Regards,

Diez B. Roggisch


From garabik at kassiopeia.juls.savba.sk  Tue Feb 22 03:13:06 2005
From: garabik at kassiopeia.juls.savba.sk (Radovan Garabik)
Date: 22 Feb 2005 08:13:06 GMT
Subject: display VARCHAR(mysql) and special chars in html
References: <mailman.2900.1109014601.22381.python-list@python.org>
Message-ID: <3807siF5g9t1cU1@individual.net>

Jonas Meurer <jonas at freesources.org> wrote:
> hello,
> 
> my script selects a comment saved as VARCHAR in MySQL and displays it
> inside an html page.
> 
> the problem is, that the comment contains several special characters, as
> mysterious utf-8 hyphens, german umlauts, etc.
> 
> i could write a function to parse the comment and substitute special
> chars with the relevant html code, but maybe this already exists in some
> module?

just make the page in utf-8, and you'll save you a lot of troubles


> 
> if not, it'll be hard work, as i've to consider many special chars, and
> at least iso-8859-1* and utf-8 as charmaps.

if you insist...
a = u'\u010c'
a.encode('ascii', 'xmlcharrefreplace')


-- 
 -----------------------------------------------------------
| Radovan Garab?k http://melkor.dnp.fmph.uniba.sk/~garabik/ |
| __..--^^^--..__    garabik @ kassiopeia.juls.savba.sk     |
 -----------------------------------------------------------
Antivirus alert: file .signature infected by signature virus.
Hi! I'm a signature virus! Copy me into your signature file to help me spread!


From reinhold-birkenfeld-nospam at wolke7.net  Mon Feb  7 12:12:09 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Mon, 07 Feb 2005 18:12:09 +0100
Subject: string issue
In-Reply-To: <1grl717.1o4ofg7arp8c2N%aleaxit@yahoo.com>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
	<36QMd.103084$Jk5.36127@lakeread01>
	<cu0j92$kf7$2@solaris.cc.vt.edu>
	<mailman.1913.1107547130.22381.python-list@python.org>
	<1grl717.1o4ofg7arp8c2N%aleaxit@yahoo.com>
Message-ID: <36plr5F551pg8U1@individual.net>

Alex Martelli wrote:
> Bill Mill <bill.mill at gmail.com> wrote:
>    ...
>> > > You are modifying the list as you iterate over it. Instead, iterate over
>> > > a copy by using:
>> > >
>> > > for ip in ips[:]:
>    ...
>> Once you know it, it's neat, and I use it sometimes. However, it's a
>> little too "magical" for my tastes; I'd rather be more explicit about
>> what's going on.
> 
> Using ips[:] to make a copy on the fly is very idiomatic, but I've never
> liked it, personally.  I see no reason to prefer it to the even shorter
> and arguably less obscure ips*1, for example.

"Less obscure"? Either you know the `lst[:]' idiom, or you don't. If you
do, it's fine, if you don't, you will have to look it up to understand
its meaning, and that's a good thing.

Using `lst*1', on the other hand, does not make clear that a copy is
created. If you don't already know what it does, you may assume that
`lst' is left alone.

>  My preference is:
> 
>   for ip in list(ips):

That is the most intriguing variant, of course.

Reinhold


From wweston at att.net  Tue Feb  1 15:43:21 2005
From: wweston at att.net (wes weston)
Date: Tue, 01 Feb 2005 20:43:21 GMT
Subject: How do you do arrays
In-Reply-To: <tbunce-0102051218150001@192.168.1.12>
References: <tbunce-0102051052450001@192.168.1.12>
	<1107284817.848551.79000@c13g2000cwb.googlegroups.com>
	<tbunce-0102051218150001@192.168.1.12>
Message-ID: <JRRLd.132071$w62.80266@bgtnsc05-news.ops.worldnet.att.net>

Thomas,
    If you were allowed to do what you're doing, the
list first element would be getting skipped as "index"
is always > 0. The thing is, you don't want the "index"
var at all for adding to the list; just do jMatrix.append(k).
    You can iterate over the list with
for x in jMatrix:
    print x

    Is it basic that indexes from 1 vs. 0? 'just about
completely forgotten basic.
wes

Thomas Bunce wrote:
> Tryed it and this is what I got (I did go to the web sight)
> 
> tom(h=500)$ /tmp/501/Cleanup\ At\ Startup/ptesting-128981347.87.py.command; exit
> Input the maximu number of tvalue: 114
> Traceback (most recent call last):
>   File "/Users/tom/Desktop/ptesting.py", line 20, in ?
>     iMatrix[index] = k
> IndexError: list assignment index out of range
> logout
> [Process completed]
> 
> The complete listing:
> 
> #!/usr/bin/python
> import random
> import sys
> import array
> #
> ### generates a list of numbers between 1 and target
> ### and uses 23 % of these values.
> #
> 
> iMatrix = []
> 
> tvalue = input('Input the maximu number of tvalue: ')
> majorlop1 = int tvalue * .23)
> listvalues = range(tvalue)
> 
> sep = '- '
> index = 0
> while index < majorlop1:
>    index = index + 1
>    k = random.choice(listvalues) + 1
>    iMatrix[index] = k
>    
> while index < majorlop1:
>    print '- %s %s' % (iMatrix[index], sep)
> #
> ###
> #
> I would like to set the size of the List/array independent 
> of having to intialialize it prior to use. 
> If it help I will say the bad works I am using OSX
> 
>    Thanks Tom
> In article <1107284817.848551.79000 at c13g2000cwb.googlegroups.com>,
> "Kartic" <kartic.krishnamurthy at gmail.com> wrote:
> 
> 
>>Tom,
>>
>>Before you use iMatrix[index], you have to tell python to use iMatrix
>>as an array. You will do that using iMatrix = [] *outside* the loop.
>>
>>iMatrix = []
>>while index < majorlop1: # rest of the loop statements
>>
>>Since you are new, please take a look at the Python tutorial to get you
>>started.
>>http://docs.python.org/tut/tut.html
>>
>>Thanks,
>>-Kartic



From mefjr75 at hotmail.com  Sat Feb 26 18:59:44 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 26 Feb 2005 15:59:44 -0800
Subject: remove strings from source
References: <2ab23d7a.0502260638.311cc5e9@posting.google.com>
	<mailman.3091.1109433365.22381.python-list@python.org>
	<2ab23d7a.0502261508.5bf50b49@posting.google.com>
Message-ID: <1109462384.838214.190750@o13g2000cwo.googlegroups.com>

qwweeeit wrote:
> Thank you for your suggestion, but it is too complicated for me...
> I decided to proceed in steps:
> 1. Take away all commented lines
> 2. Rebuild the multi-lines as single lines
ummm,
Ok all i can say is did you try this?
if not save it as a module then import it into the interperter and try
it.
This is a dead simple module to do *exactly* what you asked for :)
Like i said I have done this before so I will restate *I HAVE FAILED AT
THIS BEFORE, MANY TIMES*. Now I have a solution.
It handles stdio by default but can write to a filelike object if you
give it one.
Handles continued lines already, no need to futz around with some
solution.
Here is an example:
Py> filein = """
... class Stripper:
...     '''python comment and whitespace stripper
...     '''
...     def __init__(self, raw):
...         ''' Store the source text & set some flags.
...         '''
...         self.raw = raw
...
...     def format(self, out=sys.stdout, comments=0,
...                      spaces=1, untabify=1,eol='unix'):
...         '''Parse and send the colored source.'''
...         # Store line offsets in self.lines
...         self.lines = [0, 0]
...         pos = 0
...         # Strips the first blank line if 1
...         self.lasttoken = 1
...         self.temp = StringIO.StringIO()
...         self.spaces = spaces
...         self.comments = comments
...
...         if untabify:
...            self.raw = self.raw.expandtabs()
...         self.raw = self.raw.rstrip()+' '
...         self.out = out
...     """
Py> replacer = ReplaceParser(filein, out=sys.stdout)
Py> replacer.format()
class Stripper:
    s000001
    def __init__(self, raw):
        s000002
        self.raw = raw

    def format(self, out=sys.stdout, comments=0,
                     spaces=1, untabify=1,eol=s000003):
        s000004
        # Store line offsets in self.lines
        self.lines = [0, 0]
        pos = 0
        # Strips the first blank line if 1
        self.lasttoken = 1
        self.temp = StringIO.StringIO()
        self.spaces = spaces
        self.comments = comments

        if untabify:
           self.raw = self.raw.expandtabs()
        self.raw = self.raw.rstrip()+s000005
        self.out = out
Py> replacer.StringMap
{'s000004': "'''Parse and send the colored source.'''",
 's000005': "' '",
 's000001': "'''python comment and whitespace stripper :)\n    '''",
 's000002': "''' Store the source text & set some flags.\n        '''",
 's000003': "'unix'"}

You can also strip out comments with a few line.
It can easily get single comments or doubles.
add this in your __call__ function:
[snip]
            self.pos = newpos
            return
        # kills comments
        if (toktype == tokenize.COMMENT):
            return
        if (toktype == token.STRING):
            sname = self.StringName.next()
[snip]

If you insist on writing something go ahead.
Let me know what your solution is, I am curious.
M.E.Farmer



From tzot at sil-tec.gr  Tue Feb 22 05:25:02 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Tue, 22 Feb 2005 12:25:02 +0200
Subject: how can I make this script shorter?
References: <cveqr1$a47$1@mughi.cs.ubc.ca>
Message-ID: <nftl11tfimccjktktnj7oohbcvkfcjpe7f@4ax.com>

On Tue, 22 Feb 2005 00:34:39 -0800, rumours say that Lowell Kirsh
<lkirsh at cs.ubc.ca> might have written:

>I have a script which I use to find all duplicates of files within a 
>given directory and all its subdirectories. It seems like it's longer 
>than it needs to be but I can't figure out how to shorten it. Perhaps 
>there are some python features or libraries I'm not taking advantage of.
>
>The way it works is that it puts references to all the files in a 
>dictionary with file size being the key. The dictionary can hold 
>multiple values per key. Then it looks at each key and all the 
>associated files (which are the same size). Then it uses filecmp to see 
>if they are actually byte-for-byte copies.
>
>It's not 100% complete but it's pretty close.

I can't advise on code length; my dupefind.py script is 361 lines, but the
algorithm is slightly more complex to speed things up (and it also optionally
hardlinks identical files on POSIX and NTFS filesystems).  If in your case there
are lots of files of several MiB each, that often match on size, you could avoid
lots of comparisons if you did match based on some hash (md5 or sha).

You could also compare first on the hash of the first few kiB (I check 8 kiB) to
see if you need to read the whole file or not.

So:

for every file:
  if other files exist with the same size:
    calculate hash for first few kiB
    if file has same "initial" hash with other files:
      calculate full hash
      return all files with same full hash

Something like that.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From aleaxit at yahoo.com  Sun Feb  6 04:27:31 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 6 Feb 2005 10:27:31 +0100
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
References: <ctsjmg$75p$1@usenet.otenet.gr>
	<pan.2005.02.03.19.10.39.349763@jerf.org>
	<ueCMd.22177$Ck1.1629547@news20.bellglobal.com>
	<mailman.1871.1107502855.22381.python-list@python.org>
Message-ID: <1grk4ll.s9ln0u1bpp7huN%aleaxit@yahoo.com>

Fredrik Lundh <fredrik at pythonware.com> wrote:

> Markus Wankus wrote:
> 
> > Google his name - he has been banned from Netbeans and Eclipse (and
> > Hibernate, and others...) for good reason.  Can you imagine how much of
> > a Troll you need to be to *actually* get "banned" from the newsgroups of
> > open source projects such as those?
> 
> have Pythoneers ever "banned" anyone from a public forum?  it's not like
> we haven't seen trolls and crackpots before, you know.

I don't see how banning is technically possible in unmoderated groups.
Shunning, or pelting the troll with abuse whenever he shows up, etc,
etc, sure.  But, banning?


Alex


From ivoras at _-_fer.hr  Mon Feb 14 15:53:00 2005
From: ivoras at _-_fer.hr (Ivan Voras)
Date: Mon, 14 Feb 2005 21:53:00 +0100
Subject: 64 bit Python
In-Reply-To: <1cd7e2-qu7.ln1@valpo.de>
References: <1cd7e2-qu7.ln1@valpo.de>
Message-ID: <cur339$c5q$1@bagan.srce.hr>

Mathias Waack wrote:
> amounts of data. I figured out that a 32 bit application on HP-UX
> cannot address more than 1 GB of memory. In fact (I think due to the
> overhead of memory management done by python) a python application
> cannot use much more than 500 MB of "real" data. For this reason

I don't thik this is likely. Don't know about HP-UX but on some 
platforms, FreeBSD for example, there is a soft memory-cap for 
applications. By default, a single application on FreeBSD cannot use 
more than 512MB of memory, period. The limit can be modified by root 
(probably involves rebooting).


From tzot at sil-tec.gr  Tue Feb 22 04:00:09 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Tue, 22 Feb 2005 11:00:09 +0200
Subject: python2.4 generator expression > python2.3 list expression
References: <0ioj11dsgqhatqc3d7ldeb35rta6d9fk69@4ax.com>	<mailman.2896.1109004722.22381.python-list@python.org>
	<Xns9604B1AD25B91duncanrcpcouk@127.0.0.1>
	<mailman.2899.1109012121.22381.python-list@python.org>
Message-ID: <4asl1157chl57do6mp8ah4g32edp2vkill@4ax.com>

On Mon, 21 Feb 2005 10:55:05 -0800, rumours say that Bryan <belred at gmail.com>
might have written:


[I]
>>>>is to reset the rightmost (less significant) '1' bit of a number (ie
>>>>change it to '0').

[bryan]
>>>i tried c &= c - 1 but i'm not getting the least significant or
>>>rightmost bit reset to zero.  am i misunderstanding something?
>>>
>>>
>>>>>>2 & 1  # 2 = 0x10; reset right most would be 0x10

<snip>

[Duncan]
>> The difference between the original "reset the rightmost '1' bit", and your 
>> interpretation: "reset the rightmost bit" is the "'1'".
>> 
>> The rightmost bit that is set is reset. So 0x10 -> 0, and 0x1010 -> 0x1000.
 
<snip>


>thanks duncan... you're right, i did intrepret this as "reset the rightmost bit" 
>instead of "reset the rightmost '1' bit".  and i must have read what christos 
>wrote 100 times!!!

Don't worry, Bryan, I'm probably more to blame, since I have this tendency to
interject parenthesized sub-sentences all over my paragraphs, that probably
confuse more than clarify things ( self.remind(prose is not code) :).

Perhaps I should crosspost my replies (esp. the ones with nested parentheses) to
comp.lang.lisp ...
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From antonyliu2002 at yahoo.com  Sun Feb 27 00:03:51 2005
From: antonyliu2002 at yahoo.com (Anthony Liu)
Date: Sat, 26 Feb 2005 21:03:51 -0800 (PST)
Subject: Is it possible to pass a parameter by reference?
Message-ID: <20050227050351.24540.qmail@web54505.mail.yahoo.com>

I defined two functions, f1 and f2.  

f1 modifies the value of a variable called apple.

I want to pass the modified value of apple to f2.

How can I do this?  I got stuck.


	
		
__________________________________ 
Do you Yahoo!? 
Yahoo! Mail - You care about security. So do we. 
http://promotions.yahoo.com/new_mail


From bdesth.quelquechose at free.quelquepart.fr  Thu Feb 10 13:05:26 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 10 Feb 2005 19:05:26 +0100
Subject: goto, cls, wait  commands
In-Reply-To: <420b89f2$0$21601$a1866201@visi.com>
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
	<420b89f2$0$21601$a1866201@visi.com>
Message-ID: <420ba000$0$29241$626a14ce@news.free.fr>

Grant Edwards a ?crit :
> On 2005-02-10, BOOGIEMAN <BOOGIEMANPN at YAHOO.COM> wrote:
> 
> 
>>First of all, what's Python command equivalent to QBasic's "goto" ?
> 
> 
> There isn't one.  
> 
> One defines functions and calls them. One uses for and while
> loops.  One uses list comprehensions.  One uses if/elif/else.

and even sometimes break, continue, and return !-)


From axel at white-eagle.invalid.uk  Thu Feb 10 20:25:45 2005
From: axel at white-eagle.invalid.uk (axel at white-eagle.invalid.uk)
Date: Thu, 10 Feb 2005 19:25:45 -0600
Subject: [perl-python] combinatorics fun
References: <1108075884.250995.62520@g14g2000cwa.googlegroups.com>
Message-ID: <yK6dnST8KN8ElJHfRVn-1A@adelphia.com>

In comp.lang.perl.misc Xah Lee <xah at xahlee.org> wrote:
> a year ago i wrote this perl program as part of a larger program.
 
> sub combo ($) {
>    my $max=$_[0];
>    my %hh=();
>    for (my $j=1; $j < $max; ++$j) {
>        for (my $i=1; $i <= $max; ++$i) {
>            my $m = (($i+$j)-1)%$max+1;
>            if ($i < $m){ $hh{"$i,$m"}=[$i,$m];}
>        }
>    }
>    return \%hh;
> }
 
Well, it's not obfuscated Perl. It is, however, an obfuscated algorithm.

Sane people would use something along the lines of:

sub combo {
    my $max = shift;
    my %hh=();
    for my $i ( 1 .. $max ) {
        for my $j ( $i + 1 .. $max ) {
            $hh{"$i,$j"} = [$i, $j];
        }
    }
    return \%hh;
}

 
Axel



From devries at idolstarastronomer.com  Thu Feb 24 11:53:32 2005
From: devries at idolstarastronomer.com (Christopher De Vries)
Date: Thu, 24 Feb 2005 11:53:32 -0500
Subject: Canonical way of dealing with null-separated lines?
In-Reply-To: <lcll9efw8l.fsf@gaffa.mit.edu>
References: <lcll9efw8l.fsf@gaffa.mit.edu>
Message-ID: <20050224165332.GB13386@miyu.cjas.org>

On Wed, Feb 23, 2005 at 10:54:50PM -0500, Douglas Alan wrote:
> Is there a canonical way of iterating over the lines of a file that
> are null-separated rather than newline-separated?

I'm not sure if there is a canonical method, but I would recommending using a
generator to get something like this, where 'f' is a file object:

def readnullsep(f):
    # Need a place to put potential pieces of a null separated string
    # across buffer boundaries
    retain = []

    while True:
        instr = f.read(2048)
        if len(instr)==0:
            # End of file
            break

        # Split over nulls
        splitstr = instr.split('\0')

        # Combine with anything left over from previous read
        retain.append(splitstr[0])
        splitstr[0] = ''.join(retain)

        # Keep last piece for next loop and yield the rest
        retain = [splitstr[-1]]
        for element in splitstr[:-1]:
            yield element

    # yield anything left over
    yield retain[0]



Chris


From steven.bethard at gmail.com  Thu Feb 24 17:20:30 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 24 Feb 2005 15:20:30 -0700
Subject: Interesting decorator use.
In-Reply-To: <mailman.3022.1109283136.22381.python-list@python.org>
References: <421e2398@nntp0.pdx.net>	<mailman.3017.1109277781.22381.python-list@python.org>	<M5adncYw-5gT04PfRVn-ug@comcast.com>
	<mailman.3022.1109283136.22381.python-list@python.org>
Message-ID: <A-2dnebKq7ywzoPfRVn-tQ@comcast.com>

Tom Willis wrote:
>>> Question on decorators in general. Can you parameterize those?
>
> Wow thanks for the explanation!! Some of it is a bit mind bending to
> me at the moment , but I'm going to mess with it a bit.

Oh, I also should have mentioned that there's some explanation at:

http://www.python.org/peps/pep-0318.html

Specifically on parameterizing:

"""The current syntax also allows decorator declarations to call a 
function that returns a decorator:

@decomaker(argA, argB, ...)
def func(arg1, arg2, ...):
     pass

This is equivalent to:

func = decomaker(argA, argB, ...)(func)

The rationale for having a function that returns a decorator is that the 
part after the @ sign can be considered to be an expression (though 
syntactically restricted to just a function), and whatever that 
expression returns is called. See declaration arguments [15]."""

But playing around with it is, IMHO, definitely the best way to figure 
it out. =)

STeVe


From 18k11tm001 at sneakemail.com  Sat Feb 12 16:08:09 2005
From: 18k11tm001 at sneakemail.com (18k11tm001 at sneakemail.com)
Date: 12 Feb 2005 13:08:09 -0800
Subject: Commerical graphing packages?
In-Reply-To: <87650x28wu.fsf@pobox.com>
References: <420d1595$1@nntp.zianet.com>
	<1108163937.533683.162220@g14g2000cwa.googlegroups.com>
	<87650x28wu.fsf@pobox.com>
Message-ID: <1108242489.958991.92060@o13g2000cwo.googlegroups.com>

>If you're generating lots of graphs programatically, eg. on a web
>server, grace is not what you want.  Yes, it has a command language,
>but IIRC it depends on X11, and windows even pop up as it runs in
>batch mode.  Bleh.

I don't understand what you're talking about. I've been using GRACE in
batch mode for years and I've never had a window pop up. The only time
a window "pops up" is when you start GRACE interactively.

The GRACE command language is not the greatest, but it gets the job
done. It may have improved lately too (I run a fairly old version).

Another nice feature of GRACE is a fairly active user community and a
mailing list for help. They helped get me unstuck several times a while
back.



From http  Sun Feb 13 19:44:31 2005
From: http (Paul Rubin)
Date: 13 Feb 2005 16:44:31 -0800
Subject: Kill GIL
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<cum62t$3fb$1@panix2.panix.com>
	<mailman.2463.1108256227.22381.python-list@python.org>
	<868y5t6sal.fsf@guru.mired.org> <cumoue$9ur$1@panix2.panix.com>
	<86sm405d38.fsf@guru.mired.org>
Message-ID: <7xu0og6kcw.fsf@ruckus.brouhaha.com>

Mike Meyer <mwm at mired.org> writes:
> > Threads are also good for handling blocking I/O.
> 
> Actually, this is one of the cases I was talking about. I find it
> saner to convert to non-blocking I/O and use select() for
> synchronization. That solves the problem, without introducing any of
> the headaches related to shared access and locking that come with
> threads.

It's just a different style with its own tricks and traps.  Threading
for blocking i/o is a well-accepted idiom and if Python supports
threads at all, people will want to use them that way.


From tim.golden at viacom-outdoor.co.uk  Tue Feb 15 10:09:11 2005
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 15 Feb 2005 15:09:11 -0000
Subject: replacing ASP/VBScript with Python
Message-ID: <9A28C052FF32734DACB0A288A3533991035AF4@vogbs009.gb.vo.local>

[Peter Maas]
| 
| Peter Maas schrieb:
| > I have inherited an extremely messy ASP/VBScript application which
| > is a pain for me to support. Now the customer is thinking about a
| > redesign. I'd like to rewrite the whole thing in Python but the app
| > has to meet some conditions like
| > 
| > - IIS frontend
| > - MSSQL db server
| > - Win32 authentication
| > - No 'ugly' URLs like http://server/cgi-bin/frontend.cgi?main.py
| > - Performance: intranet with ~ 1000 users
| 
| In the meantime I have searched the internet and found plenty 
| of options:
| 
| - plain cgi with fastcgi and mod_rewrite for IIS to transform the URL
| - quixote cgi with fastcgi and mod_rewrite
| - Webware + wkcgi
| - Python ASP (registering Python with Pywin32 as ASP language)
| - mxODBC + SQL ODBC driver
| - pyADO + SQL MDAC driver

There has also been noise lately about an ISAPI-Python binding
(contributed via Mark Hammond of pywin32 fame, I think) and a
WSGI implementation of same. Haven't used either, and haven't
got time to trawl for links at the mo, but I'm fairly certain
the latest pywin32 has the core stuff.

TJG

________________________________________________________________________
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From jacek.generowicz at cern.ch  Tue Feb  1 06:58:48 2005
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 01 Feb 2005 12:58:48 +0100
Subject: type of simple object
References: <1107255752.258025.50870@z14g2000cwz.googlegroups.com>
	<1107257264.146280.89560@c13g2000cwb.googlegroups.com>
	<1107258136.815344.145380@c13g2000cwb.googlegroups.com>
Message-ID: <tyfy8e8lcef.fsf@pcepsft001.cern.ch>

"ajikoe at gmail.com" <ajikoe at gmail.com> writes:

> The result <type 'str'>
> How can I check it since it is not a string right?

It is a type, which is a first-class object in its own right.

    type('hello') == str

However, I reiterate, you almost certainly don't really care about
what the actual type is. To care about the actual type is to struggle
against a fundamental feature of python: Duck Typing.

Yes, I admit, there are situations in which you might really care
about the actual type. However, given that you do not know how to
check the type in Python, the chances are rather high that you are
sufficienly new to Python to not realize that, typically, you need not
(and should not) care about the actual type. The chances are that you
are trying to program in a style which you learned in another
language, and which not the most productive in Python.


From zyqnews at 163.net  Fri Feb 18 14:03:46 2005
From: zyqnews at 163.net (zyqnews at 163.net)
Date: 18 Feb 2005 11:03:46 -0800
Subject: unicode and socket
Message-ID: <1108753426.318777.275250@c13g2000cwb.googlegroups.com>

hello all,
 I am new in Python. And I have got a problem about unicode.
I have got a unicode string, when I was going to send it out throuth a
socket by send(), I got an exception. How can I send the unicode string
to the remote end of the socket as it is without any conversion of
encode, so the remote end of the socket will receive unicode string?

Thanks



From jack at performancedrivers.com  Fri Feb 18 11:52:54 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Fri, 18 Feb 2005 11:52:54 -0500
Subject: Help with research
In-Reply-To: <pan.2005.02.18.00.09.44.250691@jerf.org>
References: <1108684307.612656.92010@c13g2000cwb.googlegroups.com>
	<pan.2005.02.18.00.09.44.250691@jerf.org>
Message-ID: <20050218165254.GD9263@performancedrivers.com>

On Thu, Feb 17, 2005 at 07:09:44PM -0500, Jeremy Bowers wrote:
> On Thu, 17 Feb 2005 15:51:47 -0800, elena wrote:
> > I can go to my friends, however it occurred to me that it might be
> > better to post in a newsgroup and get a larger, more diverse, and
> > random sample. 
> 
> Larger, yes, more diverse, yes, more random, probably not in the
> statistical/scientific sense. Caveat emptor.

Bigtime, I see you have a occupation box for "Software Developer" and
"Other."  The data for software people (and lawyers) may be noisy becuase
they take the questions literally.  Because the answers are True/False
folks might parse them narrowly for their truth value (and all in an 
effort to help!).  for instance,

"I find that it is possible to be too organized when performing certain  
 kinds of tasks."

False, I don't find this is possible because I'm not organized.  

This reminds me of a story, for Psychology 101 all freshman had to
participate in three experiments by grad students.  One I did involved
riding on an excercise bike for ten minutes wearing a heart monitor.
After that you could leave as soon as you felt your heartrate was back
to normal.  The study concluded that people are bad at knowing when
their heart rate is elevated.  I concluded that undergrads will only
do the minimum to pass a course, and are willing to lie about their
heartrate if it gets them out the door five minutes sooner.

Be careful with data!

-Jack


From reinhold-birkenfeld-nospam at wolke7.net  Sun Feb  6 05:19:09 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Sun, 06 Feb 2005 11:19:09 +0100
Subject: Multiple constructors
In-Reply-To: <cu4ka0$72c$1@news2.tilbu1.nb.home.nl>
References: <6SjNd.38337$K7.21639@fe2.news.blueyonder.co.uk>
	<cu4ka0$72c$1@news2.tilbu1.nb.home.nl>
Message-ID: <36m98tF52msqlU2@individual.net>

vincent wehren wrote:
> Philip Smith wrote:
>> Call this a C++ programmers hang-up if you like.
>> 
>> I don't seem to be able to define multiple versions of __init__ in my matrix 
>> class (ie to initialise either from a list of values or from 2 dimensions 
>> (rows/columns)).
>> 
>> Even if Python couldn't resolve the __init__ to use on the basis of argument 
>> types surely it could do so on the basis of argument numbers???
>> 
>> At any rate - any suggestions how I code this????
> 
> Checking the number of arguments ain't all that hard:
> 
> class Klass:
>     def __init__(*args):
>         self.args = args
>         if len(self.args) == 1:
>             # etc.
> 
> This feels rather unpythonic, though. 

And it won't work, as `self' is not defined. ;)

Reinhold


From serpent17 at gmail.com  Wed Feb  2 07:36:09 2005
From: serpent17 at gmail.com (Newbie)
Date: 2 Feb 2005 04:36:09 -0800
Subject: web camera or else ? 15-30 fps processing of camera videos.
In-Reply-To: <36ah30F4tlp7bU1@individual.net>
References: <1107295229.657375.318750@o13g2000cwo.googlegroups.com>
	<36ah30F4tlp7bU1@individual.net>
Message-ID: <1107347769.355651.287650@g14g2000cwa.googlegroups.com>

Folks:

here is a small summary:

For Linux based system, xawt seems to be the solution:
http://linux.bytesex.org/xawtv/
where one can get access to the stream from any device that has a video
output.

For win32, it looks like the solution is this:
http://videocapture.sourceforge.net/
where one has to use the python programming language.

Great help, thank you all,

Jake.


Matt D wrote:
> Newbie wrote:
> > I am doing some robotics projects but my main area of interest is
> > trying out several algorithms for the processing of the stream of
data
> > coming from the video.
>
> <snip>
>
> Same for me!  From what I can tell, a cheap webcam will "just work"
with
> a recent version of windows - i.e. plug it in using USB and then you
can
> have programmatic access to the data and grab frames very easily.
This
> setup works fine with my digital camera working as a webcam - real
?10
> webcams should be the same.  Not sure what Linux compatibility is
like
> these days - for that I know for a fact that the Hauppauge USB WinTV
> thing works (or at least the hardware version I have works) with
Linux.
>
> For linux I found this (now on the wayback archive - original page is

> now 404):
>
http://web.archive.org/web/20020322015936/http://staff.aist.go.jp/naoyuki.ichimura/research/tips/v4ln_e.htm
>
> Hopefully that is some help.
>
> Oh by the way, speed on a modern machine shouldn't be an issue - my
> badly written prototype in visual basic of all things (dont laugh -
> seemed like a good idea at the time!) was tracking a single coloured
> object reliably at significantly greater than 30fps (it automatically

> altered the window it searched in based on size and amount of
movement
> of the object - at times it was approaching 100fps) on a modest by
> today's standards 1.4ghz pc, using a 320x240 stream.



From alexrait at gmail.com  Tue Feb  1 16:53:48 2005
From: alexrait at gmail.com (alexrait1)
Date: 1 Feb 2005 13:53:48 -0800
Subject: Suggesion for an undergrad final year project in Python
In-Reply-To: <1107241918.722156.123590@c13g2000cwb.googlegroups.com>
References: <1107241918.722156.123590@c13g2000cwb.googlegroups.com>
Message-ID: <1107294828.333218.132940@l41g2000cwc.googlegroups.com>

How about writing some gtk fronted to pgp.. That might be both useful
(at least for me) and teach you about pgp and pyGTK, that is writing
gui with python.



From timr at probo.com  Wed Feb 23 02:25:36 2005
From: timr at probo.com (Tim Roberts)
Date: Tue, 22 Feb 2005 23:25:36 -0800
Subject: A few q's on python files.
References: <mailman.2907.1109030036.22381.python-list@python.org>
Message-ID: <inbo11llkop2ag6oea38771qoj43jbivg5@4ax.com>

Joseph Quigley <cpu.crazy at gmail.com> wrote:
>
>i'm new to python (by a week) but am learning fast (that's what I like 
>about python--it's simplicity). I got disgusted with C and C++ (i was 
>learning) probably because of a bad copy of Visual C++ 6.0 that gave me errors.

I find that very hard to believe.

>I noticed that IDLE doesn't have an option to allow you to convert a .py or 
>pyc. file into an executable. Why? Am i wrong? Where can I find one (if I'm 
>right)?

Like VB6 and Perl, Python is interpreted, not compiled.  You don't compile
it into an .exe.  You pass the script to the python.exe interpreter, where
it is executed.

There are packages (like py2exe) that can convert your script into an
executable, but they are essentially installers.  They package your script,
and all the scripts and libraries it needs, into a single file along with
the interpreter.  When the .exe is executed, it extracts the interpreter
and the scripts into a temp directory, and fires up the interpreter.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From jjl at pobox.com  Fri Feb  4 15:34:12 2005
From: jjl at pobox.com (John J. Lee)
Date: 04 Feb 2005 20:34:12 +0000
Subject: "Collapsing" a list into a list of changes
References: <dvOMd.33656$EG1.19314@lakeread04>
	<mailman.1905.1107543558.22381.python-list@python.org>
	<LYydnagbw4-vVZ7fRVn-pw@comcast.com>
Message-ID: <87hdksvzcr.fsf@pobox.com>

Steven Bethard <steven.bethard at gmail.com> writes:

> Mike C. Fletcher wrote:
[...]
> >  >>> def changes( dataset ):
> > ...     last = None
> > ...     for value in dataset:
> > ...         if value != last:
> > ...             yield value
> > ...         last = value
> > ...        >>> print list(changes(data ))
> > which is quite readable/elegant IMO.
> 
> But fails if the list starts with None:
> 
> py> lst = [None,0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5]
> py> def changes(dataset):
> ...     last = None
> ...     for value in dataset:
> ...         if value != last:
> ...             yield value
> ...         last = value
> ...
> py> list(changes(lst))
> [0, 1, 2, 3, 2, 4, 5]
> 
> A minor modification that does appear to work:
> 
> py> def changes(dataset):
> ...     last = object()
> ...     for value in dataset:
> ...         if value != last:
> ...             yield value
> ...         last = value
> ...
> py> list(changes(lst))
> [None, 0, 1, 2, 3, 2, 4, 5]

Unless the first object in the list has a weird __cmp__ (does
happen...).  OK, weird __cmp__s are nasty anyway, but still, why
compound it through cleverness when you can write a really plodding
function that *always* does what it says on the tin?

clever-is-evil-ly y'rs,


John


From farcepest at gmail.com  Sun Feb 20 13:53:59 2005
From: farcepest at gmail.com (Andy Dustman)
Date: 20 Feb 2005 10:53:59 -0800
Subject: Trouble with mysql-python 1.2.0 on Solaris 8 sparc
In-Reply-To: <1108755202.574729.293610@g14g2000cwa.googlegroups.com>
References: <1108755202.574729.293610@g14g2000cwa.googlegroups.com>
Message-ID: <1108925639.345790.230510@c13g2000cwb.googlegroups.com>

Did you build your own MySQL, or did you use a pre-built version? And
what version? It's not clear if you're using 4.0 or 4.1. If
mysql_config is returning the wrong flags, then that's a bug with
MySQL.

You should be able to work around this by doing this in setup.py before
the call to setup():

extra_compile_args.remove('-m64')



From peter at engcorp.com  Thu Feb 10 10:11:50 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 10 Feb 2005 10:11:50 -0500
Subject: convert list of tuples into several lists
In-Reply-To: <mailman.2315.1108045657.22381.python-list@python.org>
References: <cud40u$vqb$01$1@news.t-online.com>	<36uihlF58p63iU1@individual.net>	<_cWdnZN4wO418pffRVn-qA@comcast.com>	<XL6dnRJrPeesD5ffRVn-uw@powergate.ca>	<Z9ednTx4E-VaC5ffRVn-2Q@comcast.com>
	<mailman.2315.1108045657.22381.python-list@python.org>
Message-ID: <YZadnQP52-Gs55bfRVn-qQ@powergate.ca>

Nick Coghlan wrote:
> I never really got the impression that Guido was particularly *strongly* 
> opposed to this use of the extended call syntax. Merely that he was 
> concerned that it would break down if the relevant list turned out to be 
> large (that is, the abuse is using *args with a list when the list may 
> turn out to be large, not a problem specifically with using the star 
> syntax with zip()).

Is there some unexpected limit to the number of arguments that may be
passed with the *args format (say, "256 function arguments maximum are
supported by Python"), or is this concern just because of the raw
memory inherently used by the tuple?

In other words, if one is confident that one can whip tuples of the
required size around without using up available memory, would there
still be such a concern about the *args "abuse"?

-Peter


From everettcc at hotmail.com  Fri Feb  4 13:49:51 2005
From: everettcc at hotmail.com (Chad Everett)
Date: Fri, 4 Feb 2005 12:49:51 -0600
Subject: newbie: Syntax error
Message-ID: <TrPMd.13383$3W3.8066@bignews4.bellsouth.net>

Hi Everyone,

I am new to Python and programming in general.  I bought the book "Python
Programming for the Absolute Beginner" by michael Dawson.

I have been working through it but am having trouble.
I am trying to make a coin flip program and keep geting a Synax Error
"invalid syntax".

If anyone has a moment could you please look at it and tell me what I am
doing wrong.

thanks for your time and patience.

Chad

# Coin Flip Program
# This program flips a coin 100 times and tells the number of heads and
tails.
# Chad Everett 2/3/2005


print "\t\t********Coin Flip Game*********\n"
import random

# heads = 1
# tails = 2

tries = random.randrange(2) + 1
count = 1

while count != 100:
    if tries == 1:
        heads = 1
        count += 1

    else tries == 2:  # I AM GETTING THE SYNTAX ERROR HERE
        tails = 1
        count += 1

print "heads: " + heads
print "tails: " + tails

raw_input("Press enter to quit") 




From vincent at visualtrans.de  Wed Feb  2 23:19:29 2005
From: vincent at visualtrans.de (vincent wehren)
Date: Thu, 03 Feb 2005 05:19:29 +0100
Subject: Generating .pyc/.pyo from a make file
In-Reply-To: <2h48d2-8481.ln1@eskimo.tundraware.com>
References: <4308d2-0801.ln1@eskimo.tundraware.com>
	<42015a85_1@news.arcor-ip.de>
	<dh38d2-at71.ln1@eskimo.tundraware.com>
	<4201607f_2@news.arcor-ip.de> <RldMd.102645$Jk5.24461@lakeread01>
	<2h48d2-8481.ln1@eskimo.tundraware.com>
Message-ID: <ctscc1$isf$1@news1.tilbu1.nb.home.nl>

Tim Daneliuk wrote:
> Steve Holden wrote:
> 
>> Roland Heiber wrote:
>>
>>> Tim Daneliuk wrote:
>>>
> Aha!  Exactly ... and that makes perfect sense too.  D'oh!  I guess a 
> better
> distribution strategy would be to have the installation program generate 
> the pyo
> file at installation time...
> 
> Thanks -

Also, the *.py? files contain the full pathname of the *.py they have 
been compiled from. Copying them to other path locations will give you 
the wrong __file___ information in tracebacks.

--
Vincent Wehren



From fuzzyman at gmail.com  Mon Feb 21 06:17:05 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 21 Feb 2005 03:17:05 -0800
Subject: Keyword Named Args
Message-ID: <1108984625.683340.121680@g14g2000cwa.googlegroups.com>

A colleague and I have built a Validator object for use with ConfigObj
and other general schema situations. A config file is used to store a
schema that specifies how to test a value that it is valid.

keyword=function(param1, param2)

e.g. you could specify :
size = range(30, 50)

This means that the keyword 'size' must be an integer between 30 and
50. There is a matching function stored in a dictionary that is called
and the relevant arguments passed to it.

The function name and parameters are parsed from the config file that
defines the schema.

args, fname = parsefunction('range(30,50)')
test = funcdict[fname](*args)

What I can't easily see is any way of passing named keyword arguments
to the function. Suppose we wanted to pass keyword=param to a function
- is there any way of doing this ... obviously passing in
'keyword=param' as text has entirely the wrong result......

Anyone got any clues ? I suspect compiling the function into a code
object will help.... but this is a slightly black art for me.

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From TValone at DMV.CA.gov  Wed Feb  2 18:44:52 2005
From: TValone at DMV.CA.gov (Valone, Toren W.)
Date: Wed, 2 Feb 2005 15:44:52 -0800 
Subject: Newbie alert
Message-ID: <5AE0A72A4C0AD711806A000255FC47DB2A157A@dmv-ent-ex07.dmv.ca.gov>

Ok, new to Python and Tkinter.. Following along examples in book, got to
dialog windows example coded this

# dialog1.py

from Tkinter import *

class Mydialog:

  def _int_(self,parent):

        top = self.top = Toplevel(parent)

        Label(top, text="Value").pack()

        self.e = Entry(top)
        self.e.pack(padx=5)

        b = Button(top,text="OK", command=self.ok)
                   
        b.pack(pady=5)

  def ok(self):

        print "value is", self.e.get()
        self.top.destroy()

root = Tk()
Button(root, text="Hello!").pack()
root.update()

d = MyDialog(root)

root.wait_window(d.top)               

When I run it IDLE 

gives me this

Traceback (most recent call last):
  File "C:/Python24/dialog1.py", line 29, in -toplevel-
    d = MyDialog(root)
NameError: name 'MyDialog' is not defined

I have a feeling this is something very simple, but I cannot figure it out.
Help!


From gsakkis at rutgers.edu  Fri Feb 11 16:16:02 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: Fri, 11 Feb 2005 16:16:02 -0500
Subject: check if object is number
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
	<374ho0F560ughU1@individual.net>
	<66WdnbJbuf5yj5DfRVn-iA@comcast.com>
Message-ID: <374lklF5b20klU1@individual.net>

> George Sakkis wrote:
> > "Steven Bethard" <steven.bethard at gmail.com> wrote in message
> > news:gcidnb9g_ojxnpDfRVn-tA at comcast.com...
> >
> >>Is there a good way to determine if an object is a numeric type?
> >
> > In your example, what does your application consider to be numeric?
>
> Well, here's the basic code:
>
> def f(max=None):
>      ...
>      while max is None or n <= max:
>          ...
>          # complicated incrementing of n
>
> So for 'max', technically all I need is <= support.  However, the code
> also depends on the fact that after incrementing 'n' enough, it will
> eventually exceed 'max'.  Currently, ints, longs, floats, and Decimals
> will all meet this behavior.  But I'd rather not specify only those 4
> (e.g. with a typecheck), since someone could relatively easily create
> their own new numeric type with the same behavior.  Do you know a better
> way to test for this kind of behavior?
>
> Steve

The problem is more conceptional rather than technical. So what you're saying is that 3 <= "3.0"
should not be allowed, but 3 <= SomeUserDefinedNumericClass(3) is ok, although your program knows
nothing a priori about SomeUserDefinedNumericClass. The idea suggested before, try if "x+1" fails or
not does not get you far; any class that overrides __add__ may fool this test:

class Dummy:
    def __add__(self,other):
        return 0

Is Dummy 'numeric' ? Probably not. Whether a given instance is "numeric" (or "sequence",
"file-like", etc. for that matter) is a semantic issue. It cannot be resolved by relying on which
methods are supported or not, but what these methods *do*; this is something that no programming
language can tell you now and in the (foreseeable) future.

George




From fredrik at pythonware.com  Thu Feb 17 15:26:40 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 17 Feb 2005 21:26:40 +0100
Subject: TypeError: send() argument 1 must be string or read-only buffer,
	not int
References: <4214FB83.90209@utstar.com>
Message-ID: <cv2ug0$b2l$1@sea.gmane.org>

Manish Gupta wrote:

>  invoking something like following -
>
>       sock.send(100)
>
>  generates the following error -
>
>       TypeError: send() argument 1 must be string or read-only buffer, not int
>
> >  how can I work around this? I wish to write
>  msg-length on a stream socket.

in what form?

    sock.send(chr(100)) # single byte
    sock.send(str(100)+"\n") # ascii characters plus newline
    sock.send(str(100)+":") # netstring prefix
    sock.send("%08d" % 100) # eight ascii characters, null-padded
    sock.send(str(100).encode("utf-16")) # same, in utf-16 with bom
    sock.send(struct.pack("!i", 100)) # 32-bit integer in network byte order

etc.  (see the struct module documentation for more alternatives)

</F> 





From fabsk+news at free.fr  Thu Feb 17 16:25:13 2005
From: fabsk+news at free.fr (Roger That)
Date: Thu, 17 Feb 2005 22:25:13 +0100
Subject: Convert a raw pointer to IDispatch
References: <4214a4ef$0$30359$636a15ce@news.free.fr> <acq3t5bb.fsf@python.net>
Message-ID: <pan.2005.02.17.21.25.13.847476@free.fr>

Le Thu, 17 Feb 2005 19:22:16 +0100, Thomas Heller a ?crit?:

>> I am trying to use the function "CreateStreamOnHGlobal" from python code
>> (I need to pass an IStream object to MSXML, like I do in C++ code).
>>
>> I was able to retrieve a pointer on the IStream object in this way:
>>
>> from ctypes import *
>>
>> stream = c_int()
>> windll.ole32.CreateStreamOnHGlobal(c_long(0), c_long(1), byref(stream))
>> print "%x"%stream.value
>>
>> The problem is that I would like to attach this pointer to a python
>> IDispatch object (in Python only, not using a C++ DLL to do the stuff).
>> Do you know a way to do it ?
> 
> What do you want to do with this pointer? Pass it to a function called via
> ctypes?
 

Once it is a IDispatch object (like the IDispatch object returned by
"win32com.client.Dispatch"), I will call the IStream methods on it and
pass it to a DOMDocument of MSXML. It should look like that:

stream = c_int()
windll.ole32.CreateStreamOnHGlobal(c_long(0), c_long(1), byref(stream))
stream_obj = some_conversion(stream)
# IDispatch call
stream_obj.Write("some data", 9)

doc = win32com.client.Dispatch("MSXML2.DOMDocument.4.0")
doc.load(stream_obj)



From mep_ at 163.com  Fri Feb 11 02:47:13 2005
From: mep_ at 163.com (mep)
Date: Fri, 11 Feb 2005 15:47:13 +0800
Subject: ActivePython 2.3.5.236 and ActivePython 2.4.0.244 are available
References: <mailman.2356.1108082006.22381.python-list@python.org>
Message-ID: <3736boF594g0kU1@individual.net>


ActivePython-2.4.0-243-win32-ix86.msi : 29M
ActivePython-2.4.0-244-win32-ix86.msi : 18M
What make so much difference of the size of them, which distinct  monir
version number for 1 only.
Any explaination?

-- 
Best Regards,
Wang Kebo

http://www.huihoo.org/~mep


"Trent Mick" <trentm at ActiveState.com> wrote in message
news:mailman.2356.1108082006.22381.python-list at python.org...
> I'm pleased to announce that ActivePython 2.3.5 build 236 and
> ActivePython 2.4.0 build 244 are now available from:
>
>      http://www.ActiveState.com/Products/ActivePython
>
> ActivePython 2.3.5.236 is a bug-fix release matching core Python 2.3.5.
> ActivePython 2.4.0.244 is a bug-fix release matching core Python 2.4.0.
> Both of these releases contain an important security fix for
> SimpleXMLRPCServer as detailed here:
>
>      http://www.activestate.com/Products/ActivePython/advisory.plex
>      http://www.python.org/security/PSF-2005-001/
>
> Builds for Linux, Solaris and Windows are available.
>
> We would welcome any and all feedback to:
>      ActivePython-feedback at ActiveState.com
> Please file bugs against ActivePython at:
>      http://bugs.ActiveState.com/ActivePython
>
>
> What is ActivePython?
> ---------------------
>
> ActivePython is ActiveState's quality-assured binary build of Python.
> Builds for Windows, Linux and Solaris and made freely available.
>
> ActivePython includes the Python core and core extensions (zlib 1.2.1,
> bzip2 1.0.2, bsddb 4.2.52, Tk 8.4.4, and Tix 8.1.4). On Windows,
> ActivePython includes the PyWin32 suite of Windows tools developed by
> Mark Hammond, including bindings to the Win32 API and Windows COM, the
> Pythonwin IDE, and more.
>
> ActivePython also includes a wealth of Python documentation, including:
> - the core Python docs
> - Andrew Kuchling's "What's New in Python" series
> - the Non-Programmer's Tutorial for Python
> - Mark Pilgrim's excellent "Dive into Python", and
> - a snapshot of the Python FAQs, HOWTOs and PEPs.
>
> An online version of the docs can be found here:
>      http://aspn.activestate.com/ASPN/docs/ActivePython/2.3/welcome.html
>      http://aspn.activestate.com/ASPN/docs/ActivePython/2.4/welcome.html
> In particular the Release Notes:
>      http://aspn.activestate.com/ASPN/docs/ActivePython/2.3/relnotes.html
>      http://aspn.activestate.com/ASPN/docs/ActivePython/2.4/relnotes.html
> and the Installation Guide:
> http://aspn.activestate.com/ASPN/docs/ActivePython/2.3/installnotes.html
> http://aspn.activestate.com/ASPN/docs/ActivePython/2.4/installnotes.html
>
>
> Extra Bits
> ----------
>
> This release of ActivePython also includes the following packages:
>
> - a Windows "debug" package: debug-built binaries for ActivePython
>    users building debug versions of their binary Python extensions
> - ActivePython23.chm & ActivePython24.chm: an MS compiled help
>    collection of the full ActivePython documentation set. Linux
>    users of applications such as xCHM might find this useful.
>
> These packages are available from:
>      ftp://ftp.activestate.com/ActivePython/etc/
>
> On behalf of the team at ActiveState,
> Thanks, and enjoy!
>
> -- 
> Trent Mick
> trentm at activestate.com
>
>
>
>
>




From a.schmolck at gmx.net  Fri Feb 18 19:57:30 2005
From: a.schmolck at gmx.net (Alexander Schmolck)
Date: Sat, 19 Feb 2005 00:57:30 +0000
Subject: Python, Matlab and AI question
References: <mailman.2789.1108700285.22381.python-list@python.org>
	<cv4k1h$i3f$1@news1.ucsd.edu>
	<yfsekfdipgh.fsf@black4.ex.ac.uk> <cv5ls3$t2$1@news1.ucsd.edu>
Message-ID: <yfsacq1s6x1.fsf@black4.ex.ac.uk>

Robert Kern <rkern at ucsd.edu> writes:

> Alexander Schmolck wrote:
>
>> Actually, I've written a highlevel matlab-python bridge (based on bugfixed and
>> slightly extended version of the original pymat) which is quite up-to-date; by
>> and large it makes using matlab from python as easy as if matlab were just
>> some python library:
>
> Fantastic! I've added a link to the Scipy Wiki:
>
>    http://www.scipy.org/wikis/topical_software/TopicalSoftware

Thanks -- I've now also posted announcements to the relevant forums, so I
guess I'll find out pretty soon if others deem it to be useful (working :).

'as


From nav+posts at bandersnatch.org  Thu Feb 24 10:19:46 2005
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: Thu, 24 Feb 2005 10:19:46 -0500
Subject: How to write a ping client
References: <1109039706.092671.137360@f14g2000cwb.googlegroups.com>
	<421a9d54$0$44652$a1866201@visi.com>
	<1109068125.070219.54510@o13g2000cwo.googlegroups.com>
	<lI-dnU2WevDWqIbfRVn-hg@powergate.ca>
	<1109212294.128292.119680@l41g2000cwc.googlegroups.com>
Message-ID: <87650i6l4d.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>

"Harlin Seritt" <harlinseritt at yahoo.com> writes:

> ?

#!/bin/sh
ping $1


Enjoy,

Nick

-- 
#  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this to a python
print reduce(lambda x,y:x+chr(ord(y)-1),' Ojdl!Wbshjti!=obwAcboefstobudi/psh?')


From irmen at -nospam-remove-this-xs4all.nl  Wed Feb  2 13:48:03 2005
From: irmen at -nospam-remove-this-xs4all.nl (Irmen de Jong)
Date: Wed, 02 Feb 2005 19:48:03 +0100
Subject: Python for S60 mentioned in a mainstream Finnish e-news website
In-Reply-To: <du7r7jz5dvk.fsf@lehtori.cc.tut.fi>
References: <du7wttrb8wf.fsf@lehtori.cc.tut.fi>
	<du7sm4fb3dg.fsf@lehtori.cc.tut.fi> <651bduh8.fsf@python.net>
	<du7r7jz5dvk.fsf@lehtori.cc.tut.fi>
Message-ID: <42012063$0$28992$e4fe514c@news.xs4all.nl>

Ville Vainio wrote:
>>>>>>"Thomas" == Thomas Heller <theller at python.net> writes:
> 
> 
>     >> (Yeah, ctypes will probably be a problem because of the way Symbian
>     >> handles DLLs)
> 
>     Thomas> How *does* symbian handle DLLs?
> 
> By ordinal, so the dll does not include the symbol name (in order to
> keep the size small). Linker finds the ordinals from the .LIB file
> that corresponds to the DLL.
> 
> (Someone who knows better might want to correct me if I'm wrong).
> 

<offtopic>
Heh, this somehow reminds me about the way shared libraries were
implemented on the Amiga.
No linking step; the function entry points were essentially a
big jump table in the library structure with every function having
a unique offset from the library's base.
Proved to make it very simple to patch OS functions too: just
patch the jump address in the jump table to jump to the patched
library function...
</offtopic>

Irmen


From wittempj at hotmail.com  Wed Feb  2 14:12:34 2005
From: wittempj at hotmail.com (wittempj at hotmail.com)
Date: 2 Feb 2005 11:12:34 -0800
Subject: Two classes problem
References: <mailman.1768.1107369788.22381.python-list@python.org>
Message-ID: <1107371554.756894.111800@l41g2000cwc.googlegroups.com>

If you create a.py like
-test = 'Spam'
-
-class a:
-    def __init__(self, arg):
-        global test
-        test = arg
-        self.result = arg + ' added'

-    def __call__(self):
-        return self.result
and b.py like
-import a
-a.test = 'donkey'
-x = a.a('dinosaur')
-print a.test
It will print 'dinosaur', so you changed the global variable. The thing
is however that this is a highly confusing way of programming for me,
so I would not use it just because it is possible



From john_sips_teaz at yahooz.com  Tue Feb  8 00:18:49 2005
From: john_sips_teaz at yahooz.com (John M. Gabriele)
Date: Tue, 08 Feb 2005 00:18:49 -0500
Subject: Is Python as capable as Perl for sysadmin work?
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
	<1107836010.646355.99020@z14g2000cwz.googlegroups.com>
Message-ID: <pan.2005.02.08.05.18.49.877368@yahooz.com>

On Mon, 07 Feb 2005 20:13:30 -0800, beliavsky wrote:

> 
> [snip]
> 
> I'm a Windows user, not a Unix sysadmin, but I've noticed that
> Cameron Laird has written several articles on Python for system
> administration in Unix Review and Sys Admin magazine, for example
> http://www.unixreview.com/documents/s=9083/sam0401d/ . Reading his
> articles may help you decide if Python is a good fit for your work.

Great series of articles. Thanks for the link. :)

-- 
--- if replying via email, remove zees ---




From jack at performancedrivers.com  Mon Feb 28 15:26:41 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Mon, 28 Feb 2005 15:26:41 -0500
Subject: naming convention for scalars, lists, dictionaries ...
In-Reply-To: <422386ED.60007@benjiyork.com>
References: <1109613115.760962.292360@z14g2000cwz.googlegroups.com>
	<3YydnR3xNd4k_r7fRVn-3g@comcast.com>
	<20050228190504.GV9263@performancedrivers.com>
	<422386ED.60007@benjiyork.com>
Message-ID: <20050228202641.GW9263@performancedrivers.com>

On Mon, Feb 28, 2005 at 04:02:37PM -0500, Benji York wrote:
> Jack Diederich wrote:
> >Ditto for me, plural implies list and singular implies instance, 
> >for (contact) in contacts:
> >   # do something with contact
> 
> May I ask why you place the parenthesis in the for statement?

I like the tuple-ness feel of it and frequently unpack multiple
values in for loops.  I also like the visual feel, it makes it
easy to see what is being unpacked and what is the source.

"for (one, two, three) in somelist:"
versus
"for one, two, three in sometlist:"

Even with a colorizing editor (emacs) I find the first version
easier to read.  YMMV.

-Jack



From daniel.dittmar at sap.corp  Fri Feb 11 05:47:46 2005
From: daniel.dittmar at sap.corp (Daniel Dittmar)
Date: Fri, 11 Feb 2005 11:47:46 +0100
Subject: Python in Makefile Question
In-Reply-To: <MK-dnXqPBfzkHZHfRVn-qw@adelphia.com>
References: <MK-dnXqPBfzkHZHfRVn-qw@adelphia.com>
Message-ID: <cui2hj$nc7$1@news.sap-ag.de>

Efrat Regev wrote:
> 1. How can I get the python script to return a value to make, so that if it
> decides that there are convention violations make will fail?

You can set the return code of your Python script through sys.exit (3)

> 2. How can I pass information from the makefile to the python script, e.g.,
> the base directory to check?

Python side:
Commandline arguments can be read through the list sys.argv. Parsing of 
commandline options can be done with the module optparse.

Makefile side:
I don't know if there is a special variable in GNU make for the 
directory of the current target. Why don't you set the default for the 
directory option to the current directory? Most Makefiles won't work 
anyway if they are called from a different directory.

Daniel


From luke at tatooine.planet  Mon Feb  7 17:30:55 2005
From: luke at tatooine.planet (Luke Skywalker)
Date: Mon, 07 Feb 2005 23:30:55 +0100
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com><mailman.2092.1107797420.22381.python-list@python.org><5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com><mailman.2095.1107801722.22381.python-list@python.org>	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<cu8h8k$md4$1@sea.gmane.org>
	<mailman.2110.1107809877.22381.python-list@python.org>
Message-ID: <0pqf015oqbcfuqkgrki3sbhgor0b6403r1@4ax.com>

On Tue, 08 Feb 2005 07:57:51 +1100, Tim Churches
<tchur at optushome.com.au> wrote:
>Thus, it seems to me, and to the expert legal advice which we sought 
>(note the scope of the advice was Australian law only) that provided no 
>GLPed source or object code is mixed, included or combined with 
>non-GPLed code, and that the GPLed and non-GPLed code are distributed or 
>otherwise made available in packages which are very clearly separate 
>works, and that any interaction between the two is restricted to 
>runtime, then the GPL does not require that non-GPLed code to be 
>distributed under the GPL.

That's how I understood things, ie. calling a standard, clearly
independent (ie. EXE or DLL) binary downloaded from the project's web
site and just calling it is not covered by the GPL since no change has
been made whatsoever to the original work.

Which makes sense, since the goal of the GPL is to make sure that no
one can steal the code, correct bugs or add features without
redistributing those changes.

Muddy waters, indeed :-)

Luke.


From ncoghlan at iinet.net.au  Thu Feb 10 10:00:09 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 11 Feb 2005 01:00:09 +1000
Subject: Is Python as capable as Perl for sysadmin work?
In-Reply-To: <6b8m01tcr3p7p7dq3beekj7q1fgmt9qubr@4ax.com>
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>	<mailman.2204.1107885796.22381.python-list@python.org>	<cue6d5$vn6$1@news.freedom2surf.net>
	<6b8m01tcr3p7p7dq3beekj7q1fgmt9qubr@4ax.com>
Message-ID: <420B76F9.5060101@iinet.net.au>

Richie Hindle wrote:
> [Steve]
> 
>>Was it INTERCAL that had the COMEFROM <Line number> statement instead of
>>GOTO? I REALLY like the idea of a COMEFROM statement. I think python should
>>have a COMEFROM statement
> 
> 
> It does - see http://entrian.com/goto/
> 
> (In case you doubt it: yes, it works, but note that it doesn't work at the
> interactive prompt, only in a real source file.)
> 
> (The fact that I felt obliged to add the first paragraph on that page is
> the funniest part of the whole thing.  I really did have people genuinely
> thanking me for the module, asking for features, asking for help with
> using it, and so on.)
> 

That module is. . .
  a) impressive
  b) very, very, wrong
  c) both a) and b)

I think I'm voting for c). . .

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From webmaster at python.org  Thu Feb 10 17:55:09 2005
From: webmaster at python.org (webmaster at python.org)
Date: Thu, 10 Feb 2005 17:55:09 -0500
Subject: www.python.org down - power outage
Message-ID: <20050210225509.GA22130@panix.com>

Yes, we know that www.python.org is down.  XS4ALL is suffering a power
outage.  Yes, they have backup and redundant power, but it's not working
properly for the segment of the building the web server is located in.
Fortunately, mail.python.org is located in a different part of the
building, which is still getting power.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From fuzzyman at gmail.com  Mon Feb 14 04:49:03 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 14 Feb 2005 01:49:03 -0800
Subject: mxCGIPython binaries for Python 2.3.5
In-Reply-To: <mailman.2410.1108147149.22381.python-list@python.org>
References: <20050211154457.GA23787@phd.pp.ru>
	<20050211181320.GA23241@caltech.edu>
	<mailman.2410.1108147149.22381.python-list@python.org>
Message-ID: <1108374543.366130.81590@o13g2000cwo.googlegroups.com>


Oleg Broytmann wrote:
> On Fri, Feb 11, 2005 at 10:13:21AM -0800, Titus Brown wrote:
> > what does mxCGIPython do?  I can't find anything at that Web site
that
>
>    http://www.egenix.com/files/python/mxCGIPython.html
>
> > doesn't involve downloading & unpacking a file.
>
>    It is unpackable, ready-to-run python binary.
>

It would be really noice if *someone* would maintain this for
windoze... maybe that's really difficult though *sigh*.

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml

> PS. I am neither author nor maintainer, I only provide binaries for
> some platforms...
>
> Oleg.
> --
>      Oleg Broytmann            http://phd.pp.ru/
phd at phd.pp.ru
>            Programmers don't die, they just GOSUB without RETURN.



From martin at v.loewis.de  Sun Feb 13 15:13:26 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 13 Feb 2005 21:13:26 +0100
Subject: For American numbers
In-Reply-To: <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
References: <420e7376$1@nntp0.pdx.net> <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
Message-ID: <420fb4e6$0$16575$9b622d9e@news.freenet.de>

Peter Hansen wrote:
> For the rest of the computer world, unless I've missed
> a changing of the guard or something, "kilo" is 1024
> and "mega" is 1024*1024 and so forth...

In case this isn't clear yet: you have missed a changing
of the guard or something. "kibi" is 1024, "mebi" is
1024*1024 and so forth. "kilo" is 1000.

Regards,
Martin


From fumanchu at amor.org  Tue Feb 15 14:45:24 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Tue, 15 Feb 2005 11:45:24 -0800
Subject: replacing ASP/VBScript with Python
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E339843C@exchange.hqamor.amorhq.net>

Peter Maas wrote:
> Robert Brewer schrieb:
> >>I'm now confident that it is doable and keen on finding 
> out. The usual
> >>question: what is the one and best way to do it? ;)
> > 
> > 
> > Python ASP (pywin32), but put as little code as possible into the
> > ASP--make it just a stub to call the real Python app. That 
> app will be
> > running persistently in the background, which should 
> obviate most of the
> > need for session support. That's been my experience, anyway.
> 
> Sounds reasonable. How do ASP-Python and IIS work together? 
> Is the Python-
> Interpreter loaded each time a Python-ASP is called?

No, you get a persistent process (that's what I meant by "running
persistently"). Be careful using the Low or Medium "Application
Protection" settings, as your app may mix with other applications in the
same IIS process. Sometimes, that's what you want (two apps built using
the same framework can then share framework modules if you use Low or
Medium). On the other hand, the High setting lowers performance.


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org


From jerf at jerf.org  Wed Feb  2 11:59:55 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Wed, 02 Feb 2005 11:59:55 -0500
Subject: CONTEST - What is the (best) solution?
References: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
Message-ID: <pan.2005.02.02.16.59.55.344998@jerf.org>

On Wed, 02 Feb 2005 02:35:03 -0800, python wrote:
> Each pair in a dictionary is separated by CRLF and in each dictionary
> numbers of pairs can be different.
> I need to read only the the first and the last dictionaries.What is a
> best solution?
> Thanks
> Lad

Who cares about the best solution? Odds are, your process is disk-bound
anyhow. 

Is this a thinly-veiled attempt to get someone to provide you *a*
solution, or do you already have one and you are seriously asking for a
better one? Because I'd say, take the easiest programming route: Parse the
first dict into a variable, then just loop until you run out of file,
storing a parsed dict in the "last" variable and just naturally letting
later ones overwrite earlier ones.

If you want something "best"-er than that (heh heh), you're going to have
to tell us how you are measuring better-ness.


From kent37 at tds.net  Thu Feb 17 14:06:06 2005
From: kent37 at tds.net (Kent Johnson)
Date: Thu, 17 Feb 2005 14:06:06 -0500
Subject: Alternative to standard C "for"
In-Reply-To: <mailman.2764.1108664524.22381.python-list@python.org>
References: <1107628331.816935.16760@o13g2000cwo.googlegroups.com>	<740c3aec050205104924a82d23@mail.gmail.com>	<1108620618.3892.85.camel@lipscomb.mbi.ucla.edu>
	<mailman.2764.1108664524.22381.python-list@python.org>
Message-ID: <4214e79c$1_2@newspeer2.tds.net>

James Stroud wrote:
> It seems I need constructs like this all of the time
> 
> i = 0
> while i < len(somelist):
>   if oughta_pop_it(somelist[i]):
>     somelist.pop(i)
>   else:
>     i += 1
> 
> There has to be a better way...

somelist[:] = [ item for item in somelist if not oughta_pop_it(item) ]

Kent


From jacek.generowicz at cern.ch  Tue Feb  1 07:54:12 2005
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 01 Feb 2005 13:54:12 +0100
Subject: type of simple object
References: <1107255752.258025.50870@z14g2000cwz.googlegroups.com>
	<1107257264.146280.89560@c13g2000cwb.googlegroups.com>
	<1107258136.815344.145380@c13g2000cwb.googlegroups.com>
	<tyfy8e8lcef.fsf@pcepsft001.cern.ch>
	<1107261198.943087.80960@z14g2000cwz.googlegroups.com>
Message-ID: <tyfhdkwl9u3.fsf@pcepsft001.cern.ch>

"ajikoe at gmail.com" <ajikoe at gmail.com> writes:

> Thank you guys.
> 
> My function should multiply every element  of a list, for example
> "something"
> and "something" can be an integer or another list.
> If it deals with integer than it is ok, but
> If it deals with list than it become false for example list*2 =
> listlist, and what I really want is to mutlitply its member.

Which member? A list can have many members ... or none at all.

> That's why I need to know the type of my data in "something".

No, you don't need to know its type at all. You need to know whether
it is a sequence or not ... which is a far cry from knowing its type.

> By the way I am new in python, I heard that it has a MatLab
> capabilities, How good is that?

Depends on what you mean by "MatLab capabilities". Matlab is highly
matrix oriented, therefore it provides lots of fast matrix operations,
and syntactic sugar for dealing with matrices. If you want to think of
everything as a matrix, then you could well be disappointed by
Python. 

There is a package for driving matlab from Python, which you might
find interesting (it might even be what you meant by "MatLab
capabilities"). Google is your friend.


From tjreedy at udel.edu  Thu Feb 24 17:15:30 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 24 Feb 2005 17:15:30 -0500
Subject: Python Online Programming Contest
References: <1109278779.955986.193860@z14g2000cwz.googlegroups.com>
Message-ID: <cvljel$si2$1@sea.gmane.org>


"Varun" <s.varun at gmail.com> wrote in message 
news:1109278779.955986.193860 at z14g2000cwz.googlegroups.com...
> Hi Friends,
> Department of Information Technology, Madras Institute of Technology,
> Anna University, India
> is conducting a technical symposium, Samhita. As a part of samhita, an
> Online Programming Contest is scheduled on Sunday, 27 Feb 2005.

Looks like a fun symposium.

> This is the first Online Programming Contest in India to support
> Python !!!!.
> Other languages supported are C and C++.
>
> For Registration and Rules of the contest, http://www.samhita.info/opc

Is this open worldwide or India residents only?
I could not find a time, either local or UTC.

> For details about samhita http://www.samhita.info/

Terry J. Reedy





From kent37 at tds.net  Wed Feb 16 22:04:55 2005
From: kent37 at tds.net (Kent Johnson)
Date: Wed, 16 Feb 2005 22:04:55 -0500
Subject: more os.walk() issues... probably user error
In-Reply-To: <4213A24F.1020209@athop1.ath.vt.edu>
References: <cuvr5b$2ei$1@solaris.cc.vt.edu> <cuvsmi$4bb$1@solaris.cc.vt.edu>
	<42137b28$1_3@newspeer2.tds.net>
	<4213A24F.1020209@athop1.ath.vt.edu>
Message-ID: <421406d8$1_1@newspeer2.tds.net>

rbt wrote:
>>>> ##      for fs in fs_objects:
>>>> ##
>>>> ##            for f in fs[2]:
>>>> ##                if f in file_skip_list:
>>>> ##                    print f
>>>> ##                    fs[2].remove(f)
>>>> ##
>>>> ##            for d in fs[1]:
>>>> ##                if d in dir_skip_list:
>>>> ##                    print d
>>>> ##                    fs[1].remove(d)
> 
> Will the changes I made (file and dir removals from os.walk()) be 
> reflected in the generator object? Is it safe to remove objects this way 
> and pass the results in a generator on to another function? Sorry for 
> all the questions, I just like to fully understand something before I 
> start doing it with confidence.

Yes. The docs for os.walk() explicitly state, "When topdown is true, the caller can modify the 
dirnames list in-place (perhaps using del or slice assignment), and walk() will only recurse into 
the subdirectories whose names remain in dirnames."

So changes to the dir list affect the iteration; changes to the file list directly affect the value 
you return to the caller.

Kent


From jfj at freemail.gr  Mon Feb  7 04:27:28 2005
From: jfj at freemail.gr (jfj)
Date: Mon, 07 Feb 2005 01:27:28 -0800
Subject: Confused with methods
In-Reply-To: <1grl5cn.1k7qrmm1ondzhpN%aleaxit@yahoo.com>
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>
	<mailman.2028.1107713638.22381.python-list@python.org>
	<1grl5cn.1k7qrmm1ondzhpN%aleaxit@yahoo.com>
Message-ID: <42073480.6000506@freemail.gr>

Alex Martelli wrote:

> 
> I still wouldn't see any "inconsistency" even if two different ways of
> proceeding gave the same result in a certain case.  That would be like
> saying that having x-(-y) give the same result as x+y (when x and y are
> numbers) is ``inconsistent''... the word ``inconsistent'' just doesn't
> MEAN that!
> 
> "Inconsistent" means sort of the reverse: one way of proceeding giving
> different results.  But the fact that the same operation on objects of
> different types may well give different results isn't _inconsistent_ --
> it's the sole purpose of HAVING different types in the first place...!
> 

Ok! I said I was confused in the first place!


G.



From harlinseritt at yahoo.com  Thu Feb 17 07:20:15 2005
From: harlinseritt at yahoo.com (Harlin)
Date: 17 Feb 2005 04:20:15 -0800
Subject: Pausing a program - poll/sleep/threads?
In-Reply-To: <7xekffr5ts.fsf@ruckus.brouhaha.com>
References: <1108625477.222091.34680@l41g2000cwc.googlegroups.com>
	<7xekffr5ts.fsf@ruckus.brouhaha.com>
Message-ID: <1108642815.203982.140210@g14g2000cwa.googlegroups.com>

import time

play_something()

time.sleep(LengthOfSongInSeconds)

do_something()


Have you tried that? I'd be interesting in seeing this app you have. !



From jmeile at hotmail.com  Fri Feb 11 06:17:02 2005
From: jmeile at hotmail.com (Josef Meile)
Date: Fri, 11 Feb 2005 12:17:02 +0100
Subject: Testing web applications
In-Reply-To: <cui0pe$r0c$04$1@news.t-online.com>
References: <cui0pe$r0c$04$1@news.t-online.com>
Message-ID: <420C942E.7040901@hotmail.com>

Hi Achim,

> I'm looking for frameworks to make testing web applications - i.e. 
> parsing and filling out forms - easier. I found Puffin, which looks good 
> but not very usable in the current state. I know that I once read about 
> other nice frameworks, but could not find one via google. Any hints?
Zope + Formulator is a nice combination to validating and designing
forms and add some functionality. If you want a more complicated content
management framework, then you can additionally install plain CMF or
Plone, which is based on CMF. There is also something called Silva, but
it doesn't have many products as the other two; however, it is also
nice.

I have heard also about CherryPy, Quixote, Twisted Matrix and Webware,
but I haven't tested them. Once I saw that somebody posted a link, which
compares some of them, but I lost that thread :-(

Regards,
Josef


From jason at tishler.net  Wed Feb  2 08:27:37 2005
From: jason at tishler.net (Jason Tishler)
Date: Wed, 2 Feb 2005 08:27:37 -0500
Subject: Building Python with Tcl/Tk on Cygwin_NT-5.1
In-Reply-To: <4200D056.4010000@llnl.gov>
References: <41FF5A67.3090606@llnl.gov> <20050201125129.GA432@tishler.net>
	<41FFA7C9.4070308@llnl.gov> <20050202124435.GA2472@tishler.net>
	<4200D056.4010000@llnl.gov>
Message-ID: <20050202132737.GD2472@tishler.net>

Dean,

Please keep your replies on-list.

On Wed, Feb 02, 2005 at 05:06:30AM -0800, Dean N. Williams wrote:
> It appears that I built the  Tcl/Tk libraries, but for some reasons
> they are not correct. So I am using the Tcl/Tk libraries that were
> distributed with Cygwin. This seemed to work... Now I set the
> TCL_LIBRARY and TK_LIBRARY environment, but I get the following error
> when trying to run idle.
>
> [Dean Williams at ippc ...ASD_work/bin]$ ./idle
> C:\cygwin\usr\local\ASD_work\bin\python2.4.exe (3164): *** unable to 
> remap C:\cygwin\bin\cygssl-0.9.7.dll to same address as parent(0x740000) 
> != 0x750000
>      5 [main] python2.4 2144 sync_with_child: child 3164(0x650) died 
> before initialization with status code 0x1
>   7241 [main] python2.4 2144 sync_with_child: *** child state child 
> loading dlls
> Traceback (most recent call last):
>  File "./idle", line 5, in ?
>    main()
>  File "/usr/local/ASD_work/lib/python2.4/idlelib/PyShell.py", line 
> 1355, in main
> [snip]
>  File "/usr/local/ASD_work/lib/python2.4/os.py", line 488, in _spawnvef
>    pid = fork()
> OSError: [Errno 11] Resource temporarily unavailable
>
> Does this have to do with rebaseall?

Yes.  Rebase your system (via rebaseall) following the instructions in
the Cygwin Python but remember to use the "-T" option to specify the
DLLs you built locally.  After rebasing you should be good to go.

> thanks again for all your help...

You are welcome.

Maybe three times is a charm? :,(  Why don't you use the pre-built
Python that is part of the standard Cygwin distribution?

Jason

-- 
PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6


From deetsNOSPAM at web.de  Sun Feb 20 10:47:38 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sun, 20 Feb 2005 16:47:38 +0100
Subject: introspection inquiry
References: <1108910710.985704.264430@c13g2000cwb.googlegroups.com>
	<4218A579.2060503@jessikat.fsnet.co.uk>
	<cvaaae$77q$1@gemini.csx.cam.ac.uk>
Message-ID: <cvabeq$2vo$01$1@news.t-online.com>

> Unless I misunderstood the question, that won't work. That will
> give you the name of the class the object is an instance is of.
> I think he wants the name of the class the method was defined in.

Where is the difference? The method is defined in a class - and an instance
is created from that class.

This works as expected:

class ExistentialCrisis:
    def __init__(self, text):
        self.spam = text
        print 'In the constructor of the %s class' % self.__class__.__name__


ExistentialCrisis("egal")


-- 
Regards,

Diez B. Roggisch


From miki.tebeka at zoran.com  Tue Feb  1 02:54:43 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Tue, 1 Feb 2005 09:54:43 +0200
Subject: Forcing interactive interpreter without (-i)
Message-ID: <20050201075442.GL2568@zoran.com>

Hello All,

If there a way a script can tell Python to enter interactive mode even if
the -i command line switch was not given?

I want py2exe to create an interactive session, without writing my own
REPL.

Thanks.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys


From jeff at ccvcorp.com  Wed Feb 16 19:33:53 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Wed, 16 Feb 2005 16:33:53 -0800
Subject: Font size
In-Reply-To: <4213e033$1@news.comindico.com.au>
References: <42126822@news.comindico.com.au>
	<ldzqyx6byqdw$.wt8smryc0t3.dlg@40tude.net>
	<42129ea1@news.comindico.com.au> <4213e033$1@news.comindico.com.au>
Message-ID: <1117phbb4ftst29@corp.supernews.com>

Adam wrote:

> Here's what I'm trying to do.
> We are running a numbers game at our retirement village and using a roulette 
> wheel to generate the numbers. but this wheel is only about 12 in diameter 
> and is little more than a toy. So we came up with the idea of using a random 
> number generator to generate numbers from 0 to 36 and display them in large 
> figures on my laptop. This is for the benefit of those people who are hard 
> of hearing. They like to see what is happening.
> I was an RPG programmer before retirement but am new to Python. So I used 
> the following code to generate the numbers but I don't know how to display 
> them in large figures (about 3 ins high) or get rid of the idle text.

The problem is that console displays don't support variable font 
sizes.  In order to do this, you're going to need to write a simple 
GUI program, which will be significantly more complex.

A simple program to display a random number in large text should be 
relatively easy to do in Tkinter, which has the benefit of being 
bundled with your Python distribution.  (It's got a few downsides, 
too, but most of them won't apply for this project.)  I haven't 
actually looked at it, but EasyGui (recently mentioned here; google 
should help you find it) may meet your needs and be simpler to use.

Jeff Shannon
Technician/Programmer
Credit International



From R.Brodie at rl.ac.uk  Wed Feb  9 13:45:57 2005
From: R.Brodie at rl.ac.uk (Richard Brodie)
Date: Wed, 9 Feb 2005 18:45:57 -0000
Subject: Java Integer.ParseInt translation to python
References: <008d01c507f4$451d9b30$2820790d@stso.xcdg.xerox.com>
	<372a762405013116263a4e93b7@mail.gmail.com>
	<mailman.2222.1107909486.22381.python-list@python.org>
	<1107950708.037808.211570@l41g2000cwc.googlegroups.com>
Message-ID: <cudlp6$o2s$1@blackmamba.itd.rl.ac.uk>


"John Machin" <sjmachin at lexicon.net> wrote in message
news:1107950708.037808.211570 at l41g2000cwc.googlegroups.com...

> jose isaias cabrera wrote:
> > > the question is, how can I make this java (byte) call in python? so
> that the
> > result would be the right one, "[B at 1616c7"

> However some Java code (I can't believe that it was the Java code that
> you posted) has printed NINE bytes which bear no relation that I can
> see to any of the TWENTY bytes that the posted Java code should have
> stowed in retBuf.

Well my Java is pretty rusty but I imagine the interpretation of that output
is "an array of bytes at address 1616c7". It doesn't actually matter what
the contents are.




From roy at panix.com  Wed Feb  2 11:15:42 2005
From: roy at panix.com (Roy Smith)
Date: 2 Feb 2005 11:15:42 -0500
Subject: Python Code Auditing Tool
References: <pan.2005.02.02.05.47.52.827795@flaminglunchbox.net>
	<7xhdkvbjab.fsf@ruckus.brouhaha.com>
	<mailman.1759.1107360282.22381.python-list@python.org>
Message-ID: <ctqube$hue$1@panix2.panix.com>

In article <mailman.1759.1107360282.22381.python-list at python.org>,
System Administrator  <skip at pobox.com> wrote:
>
>    >> Does anybody know of a tool that can tell me all possible exceptions
>    >> that might occur in each line of code?  What I'm hoping to find is
>    >> something like the following:
>
>    Paul> That is impossible.  The parameter to the raise statement is a
>    Paul> class object, which can be anything.
>
>Sure, but in all but the rarest of cases the first arg to raise is a
>specific exception, probably one of the standard exceptions.  In the Python
>code in the distribution (ignoring the test directory where all sorts of
>mischief is done to stress things), here are the most common words following
>"raise" where "raise" is the first word on the line:
>
>    % find . -name '*.py' \
>    > | egrep -v '\./test' \
>    > | xargs egrep '^ *raise ' \
>    > | awk '{print $3}' \
>    > | sed -e 's/[(,].*//' \
>    > | sort \
>    > | uniq -c \
>    > | sort -rn \
>    > | head -15
>     246 ValueError
>     227 aetools.Error
>     216 Error
>     124 TypeError
>     101 error
>      75 RuntimeError
>      53 IOError
>      36 NotImplementedError
>      36 ImportError
>      36 EOFError
>      31 SyntaxError
>      23 KeyError
>      23 AttributeError
>      22 DistutilsPlatformError
>      21 UnicodeError

It's kind of interesting (scarry?) that in roughly 20% of the cases
nothing more specific than Error is raised.


From simoninusa2001 at yahoo.co.uk  Thu Feb 10 14:55:34 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 10 Feb 2005 11:55:34 -0800
Subject: PyQt and Python 2.4 - also WinXP LnF?
References: <1108003471.242829.297030@o13g2000cwo.googlegroups.com>
	<mailman.2295.1108027117.22381.python-list@python.org>
Message-ID: <1108065334.812586.63620@g14g2000cwa.googlegroups.com>

I've just read the Qt4 GPL for Windows will only support gcc (and maybe
MinGW) anyway, not BCC or VisualC++ (or it's free equivalents), so it
looks like it would be a daunting task to actually build PyQt....

See http://osnews.com/comment.php?news_id=9675

I guess the Qt used in PyQt from BlackAdder just wasn't built with XP
support, and if I can't use it to compile PyQt properly, then it's
worthless to me.

I guess a lot of this licensing crap will change when Qt4 GPL is
actually released, but it's still looking like commercial Qt is the
only "easy" way to go, and the Trolls are just making a "difficult" GPL
version to shut people up!



From peter at engcorp.com  Tue Feb 15 07:28:33 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 15 Feb 2005 07:28:33 -0500
Subject: Kill GIL
In-Reply-To: <4211e287@duster.adelaide.on.net>
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<86sm405d38.fsf@guru.mired.org> <cuospv$lfn$1@panix2.panix.com>
	<mailman.2502.1108343142.22381.python-list@python.org>
	<cup0p7$c9s$1@panix2.panix.com> <4211e287@duster.adelaide.on.net>
Message-ID: <HJidndJJA9r3dozfRVn-sQ@powergate.ca>

Adrian Casey wrote:
> Aahz wrote:
>>Threads and forks tend to be problematic.  This is one case I'd recommend
>>against threads.
> 
> Multiple threads interacting with stdin/stdout?  I've done it with 2 queues. 
> One for feeding the threads input and one for them to use for output.  In
> fact, using queues takes care of the serialization problems generally
> associated with many threads trying to access a single resource (e.g.
> stdout).  Python Queues are thread-safe so you don't have to worry about
> such issues.

Hee hee.... do you realize who you're writing these comments to?

This is like someone telling _me_ I could be more effective using
test-driven development to write my code... ;-)

-Peter


From invalidemail at aerojockey.com  Mon Feb 28 17:53:08 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 28 Feb 2005 14:53:08 -0800
Subject: accessor/mutator functions
In-Reply-To: <1109315698.002207.245690@g14g2000cwa.googlegroups.com>
References: <1109315698.002207.245690@g14g2000cwa.googlegroups.com>
Message-ID: <1109631188.883036.113960@z14g2000cwz.googlegroups.com>


mirandacascade at yahoo.com wrote:
> When I look at how classes are set up in other languages (e.g. C++),
I
> often observe the following patterns:
> 1) for each data member, the class will have an accessor member
> function (a Get<whatever> function)
> 2) for each data member, the class will have a mutator member
function
> (a Set<whatver> function)
> 3) data members are never referenced directly; they are always
> referenced with the accessor and mutator functions
>
> My questions are:
> a) Are the three things above considered pythonic?

No.  It's not good programming practice in C++, either.

If you have a class that's nothing but a big data structure, you ought
to use it as a data structure.  Writing accessor and mutator methods
for its fields is just doing a lot of work to accomplish nothing.

If you want to provide access to a certain occasional field, but you're
concerned about keeping the interface backwards-compatible, go ahead
and use them.  But try to observe the following rules of thumb:

1. Don't provide accessor or mutator function to every single member of
every single class you write.  Only provide accessor/mutator functions
if the accessor/mutator methods are a sensible and useful part of the
class's interface.

2. Don't think of these methods as accessors or mutators.  Instead,
think
of them as methods that access or mutate a certain abstract property of
the object that happens to be represented by a single member.

And, keep in mind that, since Python doesn't really have private data,
you don't have to worry about adding these functions to make debugging
easier.


> b) What are the tradeoffs of using getattr() and setattr() rather
than
> creating accessor and mutator functions for each data member?

Don't use getattr and setattr unless you have to construct the name of
the attribute at run time.  That's what they're for.


-- 
CARL BANKS



From steven.bethard at gmail.com  Wed Feb 16 12:36:00 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 16 Feb 2005 10:36:00 -0700
Subject: check if object is number
In-Reply-To: <mailman.2681.1108542271.22381.python-list@python.org>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com><374ho0F560ughU1@individual.net><66WdnbJbuf5yj5DfRVn-iA@comcast.com><slrnd13cj0.u1q.apardon@rcpc42.vub.ac.be>	<O_KdnUCIV6gfvI_fRVn-jQ@comcast.com>
	<mailman.2681.1108542271.22381.python-list@python.org>
Message-ID: <vs2dnbTJV4riGY7fRVn-jA@comcast.com>

Fredrik Lundh wrote:
> Steven Bethard wrote:
> 
>>>Actually no, floats don't meet this behaviour or more specifically
>>>floats don't guarantee this behaviour. It depends of course on
>>>your implementation of f, but it is possible with floats to keep
>>>incrementing and never reach a maximum.
>>
>>My code won't hit this corner case.  I'm incrementing with integers.
> 
> 
> incrementing what with integers?
> 
>     >>> f = 9007199254740992.0
>     >>> f == f+1
>     True

I mean that the number that's being incremented is an integer:

py> f = 9007199254740992.0
py> i = 9007199254740991
py> i <= f
True
py> i += 1
py> i <= f
True
py> i += 1
py> i <= f
False

Steve


From cam.ac.uk at mh391.invalid  Thu Feb 17 04:52:20 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Thu, 17 Feb 2005 09:52:20 +0000
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <slrnd18lvg.9ng.nick@irishsea.home.craig-wood.com>
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<37hqlrF59l2b2U1@individual.net>
	<873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<slrnd18lvg.9ng.nick@irishsea.home.craig-wood.com>
Message-ID: <cv1pgp$hct$1@gemini.csx.cam.ac.uk>

Nick Craig-Wood wrote:

> Why not have another method to do this?  I propose joinany which will
> join any type of object together, not just strings

I think that's what Frederik was proposing. Except that it would be
called join and be a built-in (not a str method).
-- 
Michael Hoffman


From cpl.19.ghum at spamgourmet.com  Sun Feb  6 15:27:08 2005
From: cpl.19.ghum at spamgourmet.com (Harald Massa)
Date: Sun, 6 Feb 2005 20:27:08 +0000 (UTC)
Subject: Googling for wmi and python....
Message-ID: <Xns95F5DA3C8E499cpl19ghumspamgourmet@195.20.224.116>

I upgraded Python to 2.4

now the game really starts, looking all over the internet for all the 
packages ... I needed Tim Goldens WMI ... and googeld, dropping there:


http://www.microsoft.com/technet/scriptcenter/scripts/python/misc/wmi/defau
lt.mspx

With comment: Sample scripts for retrieving WMI configuration information. 
These sample scripts were written using Python for Windows. For sample 
scripts written using VBScript, please visit the Script Repository home 
page.


And that is above Tims GREAT WMI.module ... 

just wanted to drop that note.


From jbauer at rubic.com  Mon Feb 21 21:17:22 2005
From: jbauer at rubic.com (jbauer at rubic.com)
Date: 21 Feb 2005 18:17:22 -0800
Subject: subclassing Decimal
References: <1109022264.823730.224910@o13g2000cwo.googlegroups.com>
	<8sadneLa1dUmxoffRVn-uw@comcast.com>
Message-ID: <1109038642.719116.221250@o13g2000cwo.googlegroups.com>

STeVe,

Thanks for the response.  Very clear.

yea-though-I-walk-thru-the-valley-of-__new__-I-will-fear-no-super-ly
y'rs,

-Jeff



From claird at lairds.us  Tue Feb  1 00:08:04 2005
From: claird at lairds.us (Cameron Laird)
Date: Tue, 01 Feb 2005 05:08:04 GMT
Subject: variable declaration
References: <mailman.1645.1107188128.22381.python-list@python.org>
	<1gr9ltj.1tiisn018pnse6N%aleaxit@yahoo.com>
Message-ID: <cke3d2-i4k.ln1@lairds.us>

In article <1gr9ltj.1tiisn018pnse6N%aleaxit at yahoo.com>,
Alex Martelli <aleaxit at yahoo.com> wrote:
>Robert Brewer <fumanchu at amor.org> wrote:
>
>> Bah. Nothing teaches you a new language like having your job depend upon
>> it. People who study languages merely for "personal growth" learn 50% of
>> the syntax and 1% of the concepts, and then fritter that learning away
>> on inconsequential newsgroups the world over.
>
>I disagree.  I studied Python, even though it had nothing to do with my
>job, just with the idea of using it on hobby projects; yet I believe I
>can reasonably claim to have learned more than 50% of the syntax and 1%
>of the concepts, even though you might claim that, whatever percentage
>it may be, it's "frittered away on inconsequential newsgroups".
>
>
>Alex

We learned long ago to treat you, Alex, as an exception.
While it's rather unpythonic to have implicit rules, let's
forgive Robert for failing to mention the one that regards
you as an outlier for inferential purposes.


From x2164 at mailcity.com  Tue Feb 15 13:08:54 2005
From: x2164 at mailcity.com (x2164 at mailcity.com)
Date: 15 Feb 2005 18:08:54 GMT
Subject: test_socket.py failure
References: <ctinqv0c1a@news4.newsguy.com>
Message-ID: <cutdrm01vst@news4.newsguy.com>

x2164 at mailcity.com wrote:

>      hi all,

>      Linux 2.4.28
>      Glibc 2.2.5
>      gcc   2.95.3


>      I'm new to Python.

>      I've compiled Python 2.4 from tar file.

>      When running 'make test' i'm getting a failure
>      in test_socket.

>      Running './python Lib/test/test_socket.py' yields:


> ======================================================================
> ERROR: testGetServBy (__main__.GeneralModuleTests)
> ----------------------------------------------------------------------
> Traceback (most recent call last):
>   File "Lib/test/test_socket.py", line 330, in testGetServBy
>     port2 = socket.getservbyname(service)
> error: service/proto not found

> ----------------------------------------------------------------------
> Ran 58 tests in 3.826s



>      The value of 'service' was "daytime".

>      After much hand wringing, editing, and use of 'print'
>      statements i commented out line 330,
>      '# port2 = socket.getservbyname(service)' and replaced it
>      with the line 'port2 = port'.

>      Running './python Lib/test/test_socket.py' now yields:


> testGetServBy (__main__.GeneralModuleTests) ... ok
>    .
>    .
>    .
> ----------------------------------------------------------------------
> Ran 58 tests in 5.181s

> OK

>  
>      Located the code for 'socket_getservbyname' in 
>      'Modules/socketmodule.c' where the call to the glibc
>      function 'getservbyname' is made: 

>      Py_BEGIN_ALLOW_THREADS
>      sp = getservbyname(name, proto);
>      Py_END_ALLOW_THREADS
>      if (sp == NULL) {
>              PyErr_SetString(socket_error, "service/proto not found");
>              return NULL;
>      }

>  
>      The only call of socket.getservbyname that failed was when
>      it was passed the single argument.  Since the error message
>      "service/proto not found" seems to only be generated upon
>      failure of gibc's 'getservbyname' could it be that 
>      'PyArg_ParseTuple(args, "s|s:getservbyname", &name, &proto)'
>      generates values for 'name' and/or 'proto' that cause the
>      failure?

>      My search for prior reports of failure at line 330 found
>      a mention of problems at line 331.

>      Well, at any rate, if someone could point me down the 
>      correct path on this i would appreciate it.


>      pete jordan
>      x2164 -> mailcity.com
>      -> equals at symbol



>
> http://www.die.net/doc/linux/man/man3/getservbyname.3.html
>

     The above link was provide by Nick Coghlan. 

     Thanks Nick.

     Well if the man page says it, then it must be so.

     By way of follow up i wanted to let you know that i think
     i've found the reason why i was getting the getservbyname
     behaviour that i described.

     In my /etc/nsswitch.conf file the original line for
     scanning the /etc/services file was:

         services:   nisplus [NOTFOUND=return] db files

     The nisplus module was being used first to scan the file
     and it apparently returns 'NOTFOUND' when proto is NULL.
     '[NOTFOUND=return]' then stops any of the other two
     services, 'db' and 'files', from being used to scan 
     the 'services' file.  I changed the 'services:' line to:

         services:   nisplus db files

     and now if proto is NULL the first line in the 'services' 
     file, matching the service argument passed to 
     getservbyname, is passed back.  This seems to be consistent 
     behaviour with the man page link above.

     I'm not sure removing '[NOTFOUND=return] ' is 100% 
     correct but from information in the libc info page i 
     think it will do.

     Later i'll post this as a followup to comp.lang.python 
     thread in case someone else might have the problem.

     Thanks for the help.


     pete jordan
     x2164 AT mailcity com





From alanmk at hotmail.com  Thu Feb 10 12:21:45 2005
From: alanmk at hotmail.com (Alan Kennedy)
Date: Thu, 10 Feb 2005 17:21:45 +0000
Subject: goto, cls, wait  commands
In-Reply-To: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
Message-ID: <LGMOd.47294$Z14.32758@news.indigo.ie>

[BOOGIEMAN]
> I've just finished reading Python turtorial for non-programmers
> and I haven't found there anything about some usefull commands I used in
> QBasic. First of all, what's Python command equivalent to QBasic's "goto" ?

Oh no! You said the "G" word! That's a dirty word in computer science 
circles, because of the perception that "goto" (there, I said it, ugh!) 
can lead people to structure their code badly, i.e. write bad programs.

Instead, most modern programming languages offer a range of control and 
looping constructs that allow you to code your intention more clearly 
than with goto. Python examples include "while", "for .. in ..", "try .. 
except ..", etc, etc.

So in order to answer your question, you're probably going to have to be 
more specific on what you want "goto" for.

Interestingly, "goto"s are undergoing a bit of renaissance in coding 
circles, but people have felt compelled to call them something 
different: continuations. But you're probably not interested in them. 
And python can't do them anyway.

> Secondly, how do I clear screen (cls) from text and other content ?

That depends on

A: What type of display device you're using
B: What type of interface is being rendered on that display (command 
line, GUI, IDE, etc)
C: Perhaps what operating system you are using.

> And last, how do I put program to wait certain amount of seconds ?
> If I remeber correctly I used to type "Wait 10" and QBasic waits 
> 10 seconds before proceeding to next command.

Ahhhhhh, a simple question! :-)

import time
time.sleep(10.0)

HTH,

-- 
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan


From steven.bethard at gmail.com  Fri Feb 11 14:11:44 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 11 Feb 2005 12:11:44 -0700
Subject: check if object is number
Message-ID: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>

Is there a good way to determine if an object is a numeric type? 
Generally, I avoid type-checks in favor of try/except blocks, but I'm 
not sure what to do in this case:

     def f(i):
         ...
         if x < i:
             ...

The problem is, no error will be thrown if 'i' is, say, a string:

py> 1 < 'a'
True
py> 10000000000 < 'a'
True

But for my code, passing a string is bad, so I'd like to provide an 
appropriate error.

I thought about calling int() on the value, but this will also allow 
some strings (e.g. '1').  I guess this isn't horrible, but it seems 
somewhat suboptimal...

Ideas?

Steve


From ilias at lazaridis.com  Thu Feb 17 12:43:30 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Thu, 17 Feb 2005 19:43:30 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <YSApZIJQooECFwQk@objmedia.demon.co.uk>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr> <37bkemF5a7s7vU1@individual.net>
	<cut6nh$rpk$1@usenet.otenet.gr> <86ll9piuj8.fsf@guru.mired.org>
	<cutf1h$576$1@usenet.otenet.gr>
	<mailman.2644.1108496325.22381.python-list@python.org>
	<cutk8f$qu2$1@usenet.otenet.gr>
	<YSApZIJQooECFwQk@objmedia.demon.co.uk>
Message-ID: <cv2l43$cat$2@usenet.otenet.gr>

Stephen Kellett wrote:
[...]

closing thread
http://groups-beta.google.com/group/comp.lang.python/msg/f2ae9cdbe16676d1

.

-- 
http://lazaridis.com


From alanmk at hotmail.com  Sun Feb 13 09:38:32 2005
From: alanmk at hotmail.com (Alan Kennedy)
Date: Sun, 13 Feb 2005 14:38:32 +0000
Subject: For American numbers
In-Reply-To: <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
References: <420e7376$1@nntp0.pdx.net> <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
Message-ID: <zzJPd.47429$Z14.33326@news.indigo.ie>

[Scott David Daniels]
>> Kind of fun exercise (no good for British English).
>>
>>     def units(value, units='bytes'):
>>         magnitude = abs(value)
>>         if magnitude >= 1000:
>>             for prefix in ['kilo mega giga tera peta '
>>                            'exa zetta yotta').split():
>>                 magnitude /= 1000.
>>                 if magnitude < 1000.:
>>                     break
> 
> 

[Peter Hansen]
> Only for hard drive manufacturers, perhaps.
> 
> For the rest of the computer world, unless I've missed
> a changing of the guard or something, "kilo" is 1024
> and "mega" is 1024*1024 and so forth...

Maybe you missed these?

http://en.wikipedia.org/wiki/Kibibyte
http://en.wikipedia.org/wiki/Mebibyte
http://en.wikipedia.org/wiki/Gibibyte

kilo-mega-giga-etc-should-be-powers-of-10-ly y'rs,

-- 
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan


From davidf at sjsoft.com  Thu Feb  3 23:31:28 2005
From: davidf at sjsoft.com (David Fraser)
Date: Fri, 04 Feb 2005 06:31:28 +0200
Subject: Is there a market for python developers?
In-Reply-To: <1107440354.317628.221090@g14g2000cwa.googlegroups.com>
References: <1107440354.317628.221090@g14g2000cwa.googlegroups.com>
Message-ID: <ctutr0$bbp$1@ctb-nnrp2.saix.net>

Mabon Dane wrote:
> I am new to python and took my first attempts at working with this
> language today.  Is there a market for people who work with Python?
> 

Slavery is outlawed in most parts of the world these days :-)


From eppstein at ics.uci.edu  Fri Feb 25 00:29:12 2005
From: eppstein at ics.uci.edu (David Eppstein)
Date: Thu, 24 Feb 2005 21:29:12 -0800
Subject: [perl-python] generic equivalence partition
References: <1109245733.261643.219420@f14g2000cwb.googlegroups.com>
	<eppstein-CDFABC.20594724022005@news.service.uci.edu>
Message-ID: <eppstein-FBAF5D.21291224022005@news.service.uci.edu>

In article <eppstein-CDFABC.20594724022005 at news.service.uci.edu>,
 David Eppstein <eppstein at ics.uci.edu> wrote:

> def parti(aList,equalFunc):
>     eqv = []
>     for i in range(len(aList)):
>         print i,eqv
>         for L in eqv:
>             if equalFunc(aList[i],aList[L[0]]):
>                 L.append(i)
>                 break;
>         else:
>             eqv.append([i])

Um, take out the print, that was just there for me to debug my code.

-- 
David Eppstein
Computer Science Dept., Univ. of California, Irvine
http://www.ics.uci.edu/~eppstein/


From grante at visi.com  Thu Feb 10 11:21:06 2005
From: grante at visi.com (Grant Edwards)
Date: 10 Feb 2005 16:21:06 GMT
Subject: goto, cls, wait  commands
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
Message-ID: <420b89f2$0$21601$a1866201@visi.com>

On 2005-02-10, BOOGIEMAN <BOOGIEMANPN at YAHOO.COM> wrote:

> First of all, what's Python command equivalent to QBasic's "goto" ?

There isn't one.  

One defines functions and calls them. One uses for and while
loops.  One uses list comprehensions.  One uses if/elif/else.

> Secondly, how do I clear screen (cls) from text and other content ?

That depends on the host system.  Under Unix, you can do
os.system('clear').  Or you can use ncurses.  Or you can use
os.system to run the 'tput' command with appropriate parameters
-- see the tput man page.

There's probably some way to do it in Windows as well, but I
don't do windows.

> And last, how do I put program to wait certain amount of
> seconds ?

time.sleep(1) will wait for 1 second.
time.sleep(5.5) will wait for 5.5 seconds.

-- 
Grant Edwards                   grante             Yow!  Yow! I like my new
                                  at               DENTIST...
                               visi.com            


From phark52 at yahoo.com  Sat Feb 26 19:09:18 2005
From: phark52 at yahoo.com (Artificial Life)
Date: Sun, 27 Feb 2005 00:09:18 GMT
Subject: Xlib in Python? I need XDrawString()
Message-ID: <pan.2005.02.27.00.09.22.178913@yahoo.com>

All I really want is to write a few strings to the background of my X
display. XDrawString() is what I need. The Xlib for Python shows it's out
dated. Is there any alternative? 



From bdesth.quelquechose at free.quelquepart.fr  Thu Feb  3 04:43:31 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 03 Feb 2005 10:43:31 +0100
Subject: IDLE history, Python IDE, and Interactive Python with Vim
In-Reply-To: <4201e761$0$606$636a15ce@news.free.fr>
References: <opsllommgvb1cml1@ashot>
	<1107419485.368275.45240@l41g2000cwc.googlegroups.com>
	<4201e761$0$606$636a15ce@news.free.fr>
Message-ID: <4201f00f$0$518$636a15ce@news.free.fr>

Pierre Barbier de Reuille a ?crit :
> Fuzzyman a ?crit :
> 
>> If you use IPython for your interactive mode stuff, you'll have a nice
>> history...
>> Regards,
>>
>> Fuzzy
>> http://www.voidspace.org.uk/python/index.shtml
>>
> 
> Best event : if your "EDITOR" system variable in "vim", using the "ed" 
> command in ipython will bring "vim" with (eventually) the code you want 
> to edit :)
> 
> Now, I wonder if you could embed ipython inside vim ...

<holy-war>
Don't know, but you can embed ipython inside emacs !-)
</holy-war>

> Pierre


From miki.tebeka at zoran.com  Tue Feb 15 04:56:06 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Tue, 15 Feb 2005 11:56:06 +0200
Subject: How to implement a file lock ??
In-Reply-To: <b322b4e605021501206c98e05@mail.gmail.com>
References: <b322b4e605021501206c98e05@mail.gmail.com>
Message-ID: <20050215095545.GD3336@zoran.com>

Hello ionel,

> is there a cross-platform library or module for file locking?
> or at least a win32 implementation.
> 
> i'm trying to get a lock on some file in a cgi script. ( i got my data
> erased a few times :P )

I'm using:

---------
from os import open as _open, O_CREAT, O_EXCL, O_RDWR

lockfile = "/tmp/some_lock"
lockfd = None

def lock():
    global lockfd
    try:
        lockfd = _open(lockfile, O_CREAT|O_EXCL|O_RDWR)
        write(lockfd, "%d" % getpid())
        return 1
    except OSError: # Already locked
        lockfd = None
        return 0

def unlock():
    if not lockfd:
        return 0
    try:
        close(lockfd)
        remove(lockfile)
        return 1
    except OSError:
        return 0
---------

You can wrap it in a class. However make sure you unlock either on __del__
with is a bit tricky or atexit.register(unlock) which is better.

HTH.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys


From http  Wed Feb 16 11:23:49 2005
From: http (Paul Rubin)
Date: 16 Feb 2005 08:23:49 -0800
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<1108570047.677348.146850@f14g2000cwb.googlegroups.com>
Message-ID: <7x7jl8bhii.fsf@ruckus.brouhaha.com>

"Michele Simionato" <michele.simionato at gmail.com> writes:
> What about bsddb? On most Unix systems it should be already
> installed and on Windows it comes with the ActiveState distribution
> of Python, so it should fullfill your requirements.

As I understand it, bsddb doesn't expose the underlying Sleepycat API's
for concurrent db updates, nor does it appear to make any attempt at
locking, based on looking at the Python lib doc for it.  There's an
external module called pybsddb that includes this stuff.  Maybe the
stdlib maintainers ought to consider including it, if it's considered
stable enough.


From http  Mon Feb 14 17:51:31 2005
From: http (Paul Rubin)
Date: 14 Feb 2005 14:51:31 -0800
Subject: Kill GIL (was Re: multi threading in multi processor (computer))
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<1107964587.818199.223980@g14g2000cwa.googlegroups.com>
	<mailman.2254.1107966236.22381.python-list@python.org>
	<7xr7jlwieq.fsf@ruckus.brouhaha.com>
	<cum62t$3fb$1@panix2.panix.com>
Message-ID: <7xekfisqks.fsf@ruckus.brouhaha.com>

aahz at pythoncraft.com (Aahz) writes:
> >[phr] The day is coming when even cheap computers have multiple cpu's.
> >See hyperthreading and the coming multi-core P4's, and the finally
> >announced Cell processor.
> >
> >Conclusion: the GIL must die.
> 
> It's not clear to what extent these processors will perform well with
> shared memory space.  One of the things I remember most about Bruce
> Eckel's discussions of Java and threading is just how broken Java's
> threading model is in certain respects when it comes to CPU caches
> failing to maintain cache coherency.

Um???  I'm not experienced with multiprocessors but I thought that
maintaining cache coherency was a requirement.  What's the deal?  If
coherency isn't maintained, is it really multiprocessing?

> It's always going to be true that getting fully scaled performance
> will require more CPUs with non-shared memory -- that's going to
> mean IPC with multiple processes instead of threads.

But unless you use shared memory, the context switch overhead from
IPC becomes a bad bottleneck.

See http://poshmodule.sourceforge.net/posh/html/node1.html
for an interesting scheme of working around the GIL by spreading
naturally multi-threaded applications into multiple processes
(using shared memory).  It would simplify things a lot if you could
just use threads.


From tchur at optushome.com.au  Mon Feb  7 18:47:25 2005
From: tchur at optushome.com.au (Tim Churches)
Date: Tue, 08 Feb 2005 10:47:25 +1100
Subject: Big development in the GUI realm
Message-ID: <200502072347.j17NlPnh012281@mail07.syd.optusnet.com.au>

An embedded and charset-unspecified text was scrubbed...
Name: not available
URL: <http://mail.python.org/pipermail/python-list/attachments/20050208/2b30754a/attachment.ksh>

From lbates at syscononline.com  Mon Feb 28 15:40:36 2005
From: lbates at syscononline.com (Larry Bates)
Date: Mon, 28 Feb 2005 14:40:36 -0600
Subject: Working with dbase files
In-Reply-To: <7MyUd.73116$911.65438@fe2.texas.rr.com>
References: <7MyUd.73116$911.65438@fe2.texas.rr.com>
Message-ID: <h8qdnT_yKrkkHL7fRVn-pw@comcast.com>

On MS Windows use built in ODBC support to xBase files
which supports read and write access.

Larry Bates

Stan Cook wrote:
> Does anyone know how I can access and read data from a dbase (.dbf) file?
> 
> Regards,
> 
> Stan


From grante at visi.com  Mon Feb 21 10:22:17 2005
From: grante at visi.com (Grant Edwards)
Date: 21 Feb 2005 15:22:17 GMT
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr>
	<42185b05$0$15460$9b622d9e@news.freenet.de>
	<cv9sdo$69n$3@usenet.otenet.gr>
	<42189527$0$6260$9b622d9e@news.freenet.de>
	<cvadcj$mqc$1@usenet.otenet.gr>
	<mailman.2866.1108917759.22381.python-list@python.org>
	<cvafgu$2lk$1@usenet.otenet.gr>
	<4218cafe$0$8790$9b622d9e@news.freenet.de>
	<1108922969.140196.304380@z14g2000cwz.googlegroups.com>
	<878y5i9ayp.fsf@localhost.localdomain.i-did-not-set--m
Message-ID: <4219fca9$0$44593$a1866201@visi.com>

On 2005-02-20, Nick Vargish <nav+posts at bandersnatch.org> wrote:
> "BrainDead" <breamoreboy at aol.com> writes:
>
>> I believe that you are wasting your time.  Looking at your email
>> address, this may well be relevant.
>   [ 4-line URL snipped ]
>
> Thanks for the historical reference. Please consider a visit to
> tinyurl.com before posting a monster like that... :^)

I've never understood the problem with long URLs.  Many
newsreaders let you click on them.  If not, you just cut/paste
it into a browser (with a shellscript a couple lines long, you
can start firefox with the URL on the X clipboard with a single
command).

-- 
Grant Edwards                   grante             Yow!  I'm a GENIUS! I
                                  at               want to dispute sentence
                               visi.com            structure with SUSAN
                                                   SONTAG!!


From vetter at lincom-asg.com  Tue Feb  8 09:26:03 2005
From: vetter at lincom-asg.com (Keith)
Date: 8 Feb 2005 06:26:03 -0800
Subject: PHP Embedded In Python
In-Reply-To: <1107818262.741563.266050@c13g2000cwb.googlegroups.com>
References: <1107814685.908990.58410@z14g2000cwz.googlegroups.com>
	<1107818262.741563.266050@c13g2000cwb.googlegroups.com>
Message-ID: <1107872763.019447.281670@c13g2000cwb.googlegroups.com>


jdonnell wrote:
> I'm not sure exactly what your trying to do, but I use php and python
> together a lot. I usually call the python script from php with the
> passthru function like this:
>
> <?php
> $outputFromPy = passthru('/path/to/myScript.py');
> ?>

I need to go the other direction.  I need to call php from within
python.  Thanks.



From thomas at thomas-lotze.de  Tue Feb 15 03:43:58 2005
From: thomas at thomas-lotze.de (Thomas Lotze)
Date: Tue, 15 Feb 2005 09:43:58 +0100
Subject: StringIO objects sharing a buffer
Message-ID: <pan.2005.02.15.08.43.57.932014@ID-174572.user.uni-berlin.de>

Hi,

I want to implement a tokenizer for some syntax. So I thought I'd subclass
StringIO and make my new class return tokens on next().

However, if I want to read tokens from two places in the string in turns,
I'd either need to do some housekeeping of file pointers outside the
tokenizer class (which is ugly) or use two tokenizers on the same data
buffer (which seems impossible to me using my preferred approach as a
file-like object has exactly one file pointer).

Is there a way for multiple StringIO objects to share a buffer of data, or
do I have to give up on subclassing StringIO for this purpose? (An
alternative would be a tokenizer class that has a StringIO instead of
being one and do the file pointer housekeeping in there.)

-- 
Thomas




From michele.simionato at gmail.com  Sat Feb 26 03:54:11 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 26 Feb 2005 00:54:11 -0800
Subject: Watermark on images
In-Reply-To: <1109403419.904324.115860@f14g2000cwb.googlegroups.com>
References: <1109403419.904324.115860@f14g2000cwb.googlegroups.com>
Message-ID: <1109408051.728870.35790@f14g2000cwb.googlegroups.com>

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/362879



From steven at lczmsoft.com  Sat Feb 26 01:03:23 2005
From: steven at lczmsoft.com (steven at lczmsoft.com)
Date: 25 Feb 2005 22:03:23 -0800
Subject: Source Encoding GBK/GB2312
In-Reply-To: <421d5a29$1_3@newspeer2.tds.net>
References: <1109217736.643721.201240@o13g2000cwo.googlegroups.com>
	<421d5a29$1_3@newspeer2.tds.net>
Message-ID: <1109397803.527602.199770@z14g2000cwz.googlegroups.com>

Thank you All !  I am going to update ...



From fuzzyman at gmail.com  Wed Feb  2 09:14:08 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 2 Feb 2005 06:14:08 -0800
Subject: Is this a contradiction in the docs ?
In-Reply-To: <0i4Md.102585$Jk5.77392@lakeread01>
References: <1107342032.273119.194120@o13g2000cwo.googlegroups.com>
	<0i4Md.102585$Jk5.77392@lakeread01>
Message-ID: <1107353647.999603.252240@z14g2000cwz.googlegroups.com>


Steve Holden wrote:
> Fuzzyman wrote:
>
> > The following two passages from the python documentation *appear*
to
> > contradict each other. Equally possible (or more likely !) is that
I
> > misunderstand it :
> >
> > eval :
> > This function can also be used to execute arbitrary code objects
(such
> > as those created by compile()). In this case pass a code object
instead
> > of a string. The code object must have been compiled passing 'eval'
as
> > the kind argument.
> >
> >
> > compile:
> > The kind argument specifies what kind of code must be compiled; it
can
> > be 'exec' if string consists of a sequence of statements, 'eval' if
it
> > consists of a single expression, or 'single' if it consists of a
single
> > interactive statement (in the latter case, expression statements
that
> > evaluate to something else than None will be printed).
> >
> > The docs for compile say that if you are creating a code object
from a
> > sequence of statements you must use the kind argument 'exec'. Eval
says
> > that if you are using the eval function you must use 'eval' as your
> > kind argument.
> >
> > In practise I have found that using the eval function with code
objects
> > compiled with 'exec' as the kind argument works fine. Is this a
'bug'
> > in the docs ?
> > Regards,
> >
>
> "Dear List:
>
> I live close to a railroad, and the tracks are surrounded by a fence
> with large signs saying 'Walking on the tracks can be dangerous'.
>
> I have walked on the tracks several times, however, and I don't see
why
> the railway company put those signs there. In fact I'm walking along
the
> tracks right now as I enter this post on my hand-held, and
>
> [message ends with sound of locomotive horn followed by an ugly
squelch]."
>
> That's the kind of practice best avoided. Are you breaking the rules
> just for the fun of it?
>

Hmm.... documentation on code objects says :

Code objects are returned by the built-in compile() function and can be
extracted from function objects through their func_code attribute.

A code object can be executed or evaluated by passing it (instead of a
source string) to the exec statement or the built-in eval() function.

It mentions no such restriction. I didn't properly absorb the 'must' in
the eval description......

Hmmm... my code will *never* need to run on anything other than CPython
because I use py2exe to turn it into a frozen python distribution. So
if it was always safe in CPython then that would be fine for me.

The reason I like eval is that "If both dictionaries are omitted, the
expression is executed in the environment where eval is called".
However I think exec might do the same thing anyway. I'll just switch
to exec.

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml

> regards
>   Steve
> --
> Meet the Python developers and your c.l.py favorites March 23-25
> Come to PyCon DC 2005          http://www.python.org/pycon/2005/
> Steve Holden                           http://www.holdenweb.com/



From simon.brunning at gmail.com  Wed Feb 16 10:13:47 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Wed, 16 Feb 2005 15:13:47 +0000
Subject: Test for structure
In-Reply-To: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
References: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
Message-ID: <8c7f10c6050216071314fa528d@mail.gmail.com>

On Wed, 16 Feb 2005 07:11:08 -0800 (PST), alex
<alexander.dietz at mpi-hd.mpg.de> wrote:
> how can I check if a variable is a structure (i.e. a list)? For my
> special problem the variable is either a character string OR a list of
> character strings line ['word1', 'word2',...]
> 
> So how can I test if a variable 'a' is either a single character string
> or a list? I tried:
> 
> if a is list:
> 
> but that does not work. I also looked in the tutorial and used google
> to find an answer, but I did not.
> 
> Has anyone an idea about that?

<http://www.brunningonline.net/simon/blog/archives/001349.html>

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From paul at boddie.org.uk  Wed Feb 23 03:07:12 2005
From: paul at boddie.org.uk (Paul Boddie)
Date: 23 Feb 2005 00:07:12 -0800
Subject: UTF-8 / German,
	Scandinavian letters - is it really this difficult?? Linux &
	Windows XP
References: <cve1vh$c37$1@phys-news1.kolumbus.fi>
	<5339b60d.0502220700.3ec7ae56@posting.google.com>
	<1109090264.676680.99150@o13g2000cwo.googlegroups.com>
Message-ID: <5339b60d.0502230007.4442a5cf@posting.google.com>

"Serge Orlov" <Serge.Orlov at gmail.com> wrote in message news:<1109090264.676680.99150 at o13g2000cwo.googlegroups.com>...
> Paul Boddie wrote:
> > Anyone who has needed to expose filesystems
> > created by Linux distributions before the UTF-8 "big push" to later
> > distributions can attest to the fact that the "see no evil" brass
> > monkey is wearing a T-shirt with "UTF-8" written on it.
> 
> Unfortunately the monkey is painted in the air with a stick, so
> not everyone can see it. Python can't. Given a random linux system
> how can you tell if the monkey has pushed it already or not?

That's a good question. See this article for an example of the
frustration caused:

http://groups.google.no/groups?selm=b1npav%24cci%241%40slb6.atl.mindspring.net&output=gplain

Paul


From http  Thu Feb  3 20:38:55 2005
From: http (Paul Rubin)
Date: 03 Feb 2005 17:38:55 -0800
Subject: [Fwd: [gnu.org #220719] Re: python and gpl]
References: <mailman.1858.1107480999.22381.python-list@python.org>
Message-ID: <7x7jlp2jf4.fsf@ruckus.brouhaha.com>

Steve Holden <steve at holdenweb.com> writes:
> In the absence of other information I Cc'd gnu at gnu.org to ask their
> opinion about the relationship between GPL'd Python modules and
> programs that imported them

In the OP's particular case, he got the agreement of the GPL'd
module's author, so it stopped being an issue for that particular
module.  However the FSF takes the view that dynamic linking a GPL'd
module does count as making a derivative work, and I'm pretty sure
they have enforced this view (i.e. convinced someone who was doing it
that they better stop) in the past.


From jeff at ccvcorp.com  Fri Feb  4 15:27:52 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Fri, 04 Feb 2005 12:27:52 -0800
Subject: returning True, False or None
In-Reply-To: <pan.2005.02.04.13.01.15.184510@jerf.org>
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
	<pan.2005.02.04.13.01.15.184510@jerf.org>
Message-ID: <1107mkt7gg1t310@corp.supernews.com>

Jeremy Bowers wrote:

> On Fri, 04 Feb 2005 10:48:44 -0700, Steven Bethard wrote:
> 
>>For a given list:
>>* If all values are None, the function should return None.
>>* If at least one value is True, the function should return True.
>>* Otherwise, the function should return False.
> 
> Yes, I see the smell, you are searching the list multiple times. You
> could bail out when you can:
> 
> seenFalse = False
> for item in list:
> 	if item: return True
> 	if item is False: seenFalse = True
> if seenFalse:
> 	return False
> return None

I'd modify this approach slightly...

def tfn(lst):
     answer = None
     for item in lst:
         if item is True: return True
         if item is False: answer = False
     return answer

But yeah, the original, straightforward way is probably enough clearer 
that I wouldn't bother with anything else unless lists might be long 
enough for performance to matter.

Jeff Shannon
Technician/Programmer
Credit International



From vincent at visualtrans.de  Sun Feb  6 03:25:37 2005
From: vincent at visualtrans.de (vincent wehren)
Date: Sun, 06 Feb 2005 09:25:37 +0100
Subject: Multiple constructors
In-Reply-To: <6SjNd.38337$K7.21639@fe2.news.blueyonder.co.uk>
References: <6SjNd.38337$K7.21639@fe2.news.blueyonder.co.uk>
Message-ID: <cu4ka0$72c$1@news2.tilbu1.nb.home.nl>

Philip Smith wrote:
> Call this a C++ programmers hang-up if you like.
> 
> I don't seem to be able to define multiple versions of __init__ in my matrix 
> class (ie to initialise either from a list of values or from 2 dimensions 
> (rows/columns)).
> 
> Even if Python couldn't resolve the __init__ to use on the basis of argument 
> types surely it could do so on the basis of argument numbers???
> 
> At any rate - any suggestions how I code this????

Checking the number of arguments ain't all that hard:

class Klass:
    def __init__(*args):
        self.args = args
        if len(self.args) == 1:
            # etc.

This feels rather unpythonic, though. Maybe you could use factory 
functions, forgetting about  __init__ all together (2.2 or higher):

class Klass(object):

     def fromList(seq):
         result = Klass()
         # populate attributes here
         # and return the requested object
         return result

     fromList = staticmethod(fromList)

     def fromDimensions(cols, rows):
         result = Klass()
         # populate attributes here
         # and return the requested object
         return result

    fromDimensions = staticmethod(fromDimensions)

    #more methods  here


k = Klass.fromList(seq)
etc..


Regards
--

Vincent Wehren







> 
> Thanks
> 
> Phil 
> 
> 


From steven at lczmsoft.com  Sun Feb 20 21:21:55 2005
From: steven at lczmsoft.com (steven at lczmsoft.com)
Date: 20 Feb 2005 18:21:55 -0800
Subject: How Do I get Know What Attributes/Functions In A Class?
In-Reply-To: <d1c02$42182841$a228dd19$19743@ispnews.usenetserver.com>
References: <1108870842.095282.54200@z14g2000cwz.googlegroups.com>
	<d1c02$42182841$a228dd19$19743@ispnews.usenetserver.com>
Message-ID: <1108952515.297032.306980@l41g2000cwc.googlegroups.com>

Thank you Hans.   Could you give me a simple sample of using inspect?



From ncoghlan at iinet.net.au  Mon Feb 14 04:28:28 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Mon, 14 Feb 2005 19:28:28 +1000
Subject: custom classes in sets
In-Reply-To: <cuph15$esp$1@sea.gmane.org>
References: <cuph15$esp$1@sea.gmane.org>
Message-ID: <42106F3C.9000302@iinet.net.au>

vegetax wrote:
> How can i make my custom class an element of a set?
> 
> class Cfile:
>   def __init__(s,path): s.path = path
> 
>   def __eq__(s,other):
>    print 'inside equals'
>    return not os.popen('cmp %s %s' % (s.path,other.path)).read()
> 
>   def __hashcode__(s): return s.path.__hashcode__()
> 
> the idea is that it accepts file paths and construct a set of unique 
> files (the command "cmp" compares files byte by byte.),the files can
> have different paths but the same content
> 
> but the method __eq__ is never called

Your problem is that your class defines an insane hash. For a sane hash, A == B 
implies hash(A) == hash(B), whereas you have based your hash on the path to the 
files, but the comparison on the contents of the files. If the paths are all 
different, then nothing is likely to hash the same, so the set will never get 
around to trying the direct comparison.

Change the hash method to use the size of the file or something else that has to 
be equal for the comparison to be equal (like the hash of the first line, or of 
the entire file), and you should see much better behaviour.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From harlinseritt at yahoo.com  Mon Feb 28 05:57:18 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 28 Feb 2005 02:57:18 -0800
Subject: Explicit or general importing of namespaces?
Message-ID: <1109588238.491145.52060@l41g2000cwc.googlegroups.com>

Is there really a major performance difference between doing the
following:

import Tkinter as TK

TK.Label(yada yada)

OR

from Tkinter import *

Label(yada yada)

I'm unable to tell a real difference other than in the code writing
:-).

Thanks,

Harlin



From axel at straschil.com  Thu Feb  3 04:26:28 2005
From: axel at straschil.com (Axel Straschil)
Date: Thu, 3 Feb 2005 09:26:28 +0000 (UTC)
Subject: Generating modul classes with eval
References: <mailman.1772.1107377411.22381.python-list@python.org>
	<pan.2005.02.02.21.20.40.542069@jerf.org>
Message-ID: <slrnd03rj7.ahi.axel@m2.sine>

Hello!

> Note that we don't need eval anywhere.

Uuups, that looks realy cool! Thanks for that!

Im fooling around with generating html-tags. As there are only two kind
of html tags, one who can nest chields, and one who cant, i wantet to
play arround with something like:

I've got two base classes, _Tag and _ContainerTag (for tags which can
nest tags). Instead of getting an htmltag with _Tag(name='html'), I
want to have a class for each html-tag. So, I thought of creating that
classes dynamicly.

my now (nearly) working code is:

class _Tag(object):
	def __init__(self, name, flags=None, **props):
	[...]

class _ContainerTag(_Tag):
	def __init__(self, name, contents=None, flags=None, **props):
		super(_ContainerTag, self).__init__(name=name, flags=flags, **props)
		self._contents = coalesce(contents, [])
						

_module_name = sys.modules[__name__]

class_dic = {}
class_dic['Br'] = _Tag
class_dic['Hr'] = _Tag
class_dic['Html'] = _ContainerTag
class_dic['Table'] = _ContainerTag

for class_name, class_base in class_dic.items():
	class TmpClass(class_base):
		def __init__(self, **props):
			name = class_name.lower()
			#super(TmpClass, self).__init__(name=name, **props)
			class_base.__init__(self, name=name, **props)
	setattr(_module_name, class_name, TmpClass)
	
br = Br()
print br
table = Table()
print table

br is printed OK, but for table, I get:
AttributeError: 'TmpClass' object has no attribute '_contents'
so, it seems that __init__ of _Tag is not called. 
If I try to do the commented line
	super(TmpClass, self).__init__(name=name, **props)
instead of
	class_base.__init__(self, name=name, **props)
I get:
 TypeError: super(type, obj): obj must be an instance or subtype of
 type
for print table, print br ist processed OK.


Thanks for help and your perfekt examples,
AXEL.



From aleaxit at yahoo.com  Sun Feb  6 10:57:31 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 6 Feb 2005 16:57:31 +0100
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<qb1a01lk3mv4vp852q88prqb9al336h9r2@4ax.com>
	<1grj036.r13xcy1d72inbN%aleaxit@yahoo.com>
	<2qba01d1men2ai48gp4cojo2e28rd5g9ob@4ax.com>
	<1grjzia.1a4qr9q1t3p77bN%aleaxit@yahoo.com>
	<roy-6A286B.10055306022005@reader2.panix.com>
Message-ID: <1grkmo3.5kt3jumncr52N%aleaxit@yahoo.com>

Roy Smith <roy at panix.com> wrote:

> > which is good news for sellers of books, tools, training, consultancy
> > services, and for Python programmers everywhere -- more demand always
> > helps.  *BUT* the price is eternal vigilance...
> 
> I'm not sure what that last sentence is supposed to mean, but I have 

You seem to...:

> visions (nightmares?) of someday having ANSI, ISO, IEEE, or some other such
> organization notice that something useful exists which they haven't yet
> standardized/broken and decide to form a committee to do it.

...so we'd better be careful (==eternal vigilance)...


Alex


From sharidas at zeomega.com  Thu Feb 10 08:49:54 2005
From: sharidas at zeomega.com (Satchidanand Haridas)
Date: Thu, 10 Feb 2005 19:19:54 +0530
Subject: implementing singleton class at the module level
Message-ID: <420B6682.6090001@zeomega.com>

Hi,

I was looking at ways to implement a Singleton class. I saw some methods 
described on the PythonSingleton wiki 
(http://c2.com/cgi/wiki?PythonSingleton). I implemented the following.

<code>

module: A.py
----------------------
class Singleton:
    def __init__(self):
       #do something


singleton_instance = Singleton()



Then in any other module (eg B.py):

from A import singleton_instance


</code>

singleton_instance will be created only once and can be reused in other 
modules. But is this ok? I am trying to figure out what are the 
disadvantages of using the above method. I would appreciate any 
comments. thanks.

regards,
Satchit



From ted_lilley at yahoo.com  Fri Feb 18 05:28:41 2005
From: ted_lilley at yahoo.com (Thomas Lilley)
Date: Fri, 18 Feb 2005 02:28:41 -0800 (PST)
Subject: COM+metaclass+property issue
Message-ID: <20050218102841.14987.qmail@web51902.mail.yahoo.com>

I'm trying to manufacture a class that provides attributes which mimic the HTML collections offered by the Internet Explorer COM object.  My platform is Win32 (Windows XP) and ActiveState's latest Python 2.3.  The problem is, my attributes are based on properties, which work fine except for when I have a win32com collection returned, they don't appear to have any information in them.  Part of my code:
 
from win32com.client import Dispatch

class metaie(type):
    def __init__(cls, name, bases, dict):
        super(metaie, cls).__init__(name, bases, dict)
        for tag in cls.tags:
            setattr(cls, tag, property(lambda self: self.ie.Document.getElementsByTagName(tag)))
 
class ie(object):
    __metaclass__ = metaie
    tags = ["a", "area", "body", "button", "fieldset", "form", "frame", "head",
            "html", "img", "li", "link", "ol", "table", "td", "tr", "ul"]
    def __init__(self):
        self.ie = Dispatch("InternetExplorer.Application")

An example of the problem:
 
>>>myie = ie()
>>>myie.ie.Document.Navigate(http://www.google.com/)
>>>myie.table.length
0
>>>myie.ie.getElementsByTagName("table").length
2
 
A quick note: ie is my wrapper class, while ie.ie is the win32com Dispatch object representing Internet Explorer.
 
My code should be creating a property attribute for each tag in the tags list and binding it to getElementsByTagName() with the tag pre-loaded by the lambda expression.  This means that reading the attribute myie.table should be equivalent to a call to ie.ie.Document.getElementsByTagName("table").  But for some reason, it's not working.  Other property assignments in the metaclass that don't refer to getElementsByTagName work fine (for example, I make ie.url an attribute that navigates to whatever location you assign to it).  Is there any guru who understands these tools out there who can help?
 
In case you're wondering, the reason I brought metaclasses into the picture is that you can't iterate through a list of attribute assignments within the class definition using setattr or __dict__ because the former requires a class name (doesn't exist until the class statement completes) and the latter doesn't seem to exist for classes, at least, I couldn't find a class __dict__.

		
---------------------------------
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From sean_mcilroy at yahoo.com  Mon Feb 28 15:06:06 2005
From: sean_mcilroy at yahoo.com (Sean McIlroy)
Date: 28 Feb 2005 12:06:06 -0800
Subject: canvassing for assistance
Message-ID: <e5063e96.0502281206.1b29528a@posting.google.com>

Hi all!

I've written a utility for making diagrams. It could also be a good
environment for experimenting with a Tk canvas, so I'm including the
code here (see below). The problem is that, when I save a canvas and
include the resulting postscript file in a LaTeX document, I often
find that the right edge of the canvas has been cut off and/or that
there's a bunch of extra space at the bottom that forces the picture
to take up a whole page just by itself. The Introduction to Tkinter
lists a bunch of options for the Canvas postscript method, but it
doesn't say anything about the semantics of any of them, and there are
several that sound like they could be what I need. So, if anybody
knows how to exercise finer control over the Canvas postscript method,
I'd be grateful to hear about it.

Peace,
STM


###############################################
## FRESH SHELL: import canvasser
## (so that text can be copied from the shell)
###############################################

pencil = 1
eraser = 10
color = 'black'

def save():
    from tkSimpleDialog import askstring
    filename = askstring('save diagram','enter name of diagram: ') +
'.eps'
    canvas.postscript(file=filename,width=100,height=100,pagewidth=100,pageheight=100)

def circle(x,y,radius=25,color=None): 
    r = radius
    return canvas.create_oval(x-r,y-r,x+r,y+r,fill=color)

#################################################################################

__P__ = None
__I__ = None

def draw(event):   
    global __P__
    Q = [event.x,event.y]
    canvas.create_line(__P__[0],__P__[1],Q[0],Q[1],width=pencil,fill=color)
    __P__ = Q
   
def erase(event):
    r = eraser
    x,y = event.x,event.y
    for x in canvas.find_overlapping(x-r,y-r,x+r,y+r):
canvas.delete(x)

def carry(event):
    if __I__==None: return
    C = canvas.coords(__I__)
    x,y = event.x,event.y
    if len(C)==2: canvas.coords(__I__,x,y)
    else:
        a,b = C[:2]        
        f = lambda i: ( i%2 and [y-b] or [x-a] ) [0]
        D = [x,y] + [C[i] + f(i) for i in range(2,len(C))]
        canvas.coords(__I__,*D)

def scale(event):
    C = canvas.coords(__I__)
    if len(C)<>4: return
    canvas.coords(__I__,C[0],C[1],event.x,event.y)

def point(event):
    codeArea.insert(INSERT,str(event.x) + ',' + str(event.y))

def item(event):
    codeArea.insert(INSERT,str(canvas.find_closest(event.x,event.y)[0]))
  
def mouseDown(event):
    global __P__,__I__
    m = mode.get()
    if   m==0: __P__ = [event.x,event.y]
    elif m==2: point(event)
    elif m==3: item(event)
    elif m>=4: __I__ = canvas.find_closest(event.x,event.y)

def mouseDrag(event):
    m = mode.get()
    if   m==0: draw(event)    
    elif m==1: erase(event)
    elif m==4: carry(event)
    elif m==5: scale(event)

def mouseUp(event): 
    global __P__,__I__
    __P__ = None
    __I__ = None

def runCode(dummy):
    x = codeArea.get()
    y = [i for i in range(len(x)) if x[i]=='=' and
x[:i].count('(')==0]
    z = y and x[:y[0]] + '=' + x[y[0]+1:] or x
    print '>>> ' + z
    try: exec z in globals()         
    except: print 'ERROR'
    codeArea.delete(0,END)

from Tkinter import *
print '*'*80
print 'REMINDER: canvas; pencil,eraser,color; save,circle'
print '*'*80 
root = Tk()
canvas = Canvas(root,background='white')
canvas.bind('<Button-1>',mouseDown)
canvas.bind('<B1-Motion>',mouseDrag)
canvas.bind('<ButtonRelease-1>',mouseUp)
canvas.pack(side=TOP,expand=1,fill=BOTH)
codeArea = Entry(root,font=6)
codeArea.pack(side=TOP,expand=1,fill=X)
codeArea.bind('<Return>',runCode)
ctrl = Frame(root)
mode = IntVar()
Radiobutton(ctrl,indicatoron=0,variable=mode,value=0,text='draw').pack(side=LEFT)
Radiobutton(ctrl,indicatoron=0,variable=mode,value=1,text='erase').pack(side=LEFT)
Radiobutton(ctrl,indicatoron=0,variable=mode,value=2,text='point').pack(side=LEFT)
Radiobutton(ctrl,indicatoron=0,variable=mode,value=3,text='item').pack(side=LEFT)
Radiobutton(ctrl,indicatoron=0,variable=mode,value=4,text='carry').pack(side=LEFT)
Radiobutton(ctrl,indicatoron=0,variable=mode,value=5,text='scale').pack(side=LEFT)
ctrl.pack(side=TOP,pady=10)
root.title('canvasser')
root.mainloop()


From Serge.Orlov at gmail.com  Sat Feb 12 03:17:15 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: Sat, 12 Feb 2005 11:17:15 +0300
Subject: sre is broken in SuSE 9.2
References: <mailman.2299.1108029731.22381.python-list@python.org><1108060527.378911.146240@o13g2000cwo.googlegroups.com><cugc2v$i8u$1@swifty.westend.com><1108064973.719544.228970@z14g2000cwz.googlegroups.com><mailman.2372.1108115088.22381.python-list@python.org><1108133339.401022.272310@f14g2000cwb.googlegroups.com>
	<mailman.2414.1108155328.22381.python-list@python.org>
Message-ID: <cuke2c$fo9$1@news.comcor-tv.ru>

Fredrik Lundh wrote:
> Serge Orlov wrote:
>
>>>>>> re.compile(ur'\w+', re.U).findall(u'\xb5\xba\xe4\u0430')
>>>>>> [u'\xb5\xba\xe4\u0430']
>>
>> I can't find the strict definition of isalpha, but I believe average
>> C program shouldn't care about the current locale alphabet, so
>> isalpha is a union of all supported characters in all alphabets
>
> btw, what does isalpha have to do with this example?

It has to do with this thread. u'\xe4'.isalpha() returns false in
Suse. It's in the same boat as \w

  Serge.




From peter at engcorp.com  Thu Feb 10 09:01:28 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 10 Feb 2005 09:01:28 -0500
Subject: newbie question
In-Reply-To: <9tidneo6EZm1QpffRVn-sg@rogers.com>
References: <1107990182.516041.120410@o13g2000cwo.googlegroups.com>
	<seudnRY79e_AXJffRVn-pg@rogers.com> <feuqd2-bqv.ln1@lairds.us>
	<9tidneo6EZm1QpffRVn-sg@rogers.com>
Message-ID: <dsWdnSiaAL8u9JbfRVn-sg@powergate.ca>

Dan Perl wrote:
> I can't say that is not part of the reason, but the example in the OP is a 
> clear illustration of cases where something like an increment/decrement 
> operator would be very useful.  

The OP didn't show how he was using the "while (n--)" at all,
so it can hardly be a clear illustration of how it's useful.
In fact, it's even possible it was entirely unnecessary in
the original code...  at this point I'd be really interested
in seeing just what code is inside the "while" statement, and
possibly what follows it (if the following code relies on the
value of "n").

> OTOH, I was thinking of saying in my 
> previous posting that I prefer
>     for n in range(start, 0, -1):
> to
>     n = start
>     while (n--)
> I think that the first form is more readable, although that may be just me. 
> I would actually even prefer the 'for' statement in C to the 'while' 
> statement:
>     for (n=start; n<=0; n--) 

I'm not sure if it's just picking nits, but I'd like to
point out that neither of your alternatives is actually
equivalent to the while (n--) form...  nor was Jeff
Shannon's attempt (in that case it leaves the loop with
n equal to 0, not -1).

The fact that it's so easy to get confused with post-decrement
is perhaps an excellent reason to keep it out of Python.

-Peter


From rbt at athop1.ath.vt.edu  Mon Feb 14 09:14:30 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Mon, 14 Feb 2005 09:14:30 -0500
Subject: safest way to open files on all platforms
Message-ID: <cuqbo6$hp6$1@solaris.cc.vt.edu>

I believe that this is the safest way to open files on Windows, Linux, 
Mac and Unix, but I wanted to ask here just to be sure:

fp = file('filename', 'rb')

The 'b' on the end being the most important ingredient (especially on 
Windows as a simple 'r' on a binary file might cause some sort of 
corruption).

Anyway, am I right in saying this? That 'rb' is the safest way to open 
files for reading and that it should work well on *all* Python supported 
platforms?

Many thanks,

RBT


From jdadson at yahoo.com  Wed Feb  9 18:11:10 2005
From: jdadson at yahoo.com (Jive Dadson)
Date: Wed, 09 Feb 2005 23:11:10 GMT
Subject: negative integer division
References: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
	<42096EAD.879E8A5F@yahoo.com> <86wtti76cp.fsf@guru.mired.org>
	<420A916C.94F7F175@yahoo.com> <420a9513$0$29477$a1866201@visi.com>
Message-ID: <420A98C7.103157A@yahoo.com>



Grant Edwards wrote:
> 
> On 2005-02-09, Jive Dadson <jdadson at yahoo.com> wrote:
> 
> >> [C] isn't - it's a portable assembler.
> >
> > I've heard that many times, but it makes no sense to me.
> 
> I think the point is that C is a low-level, hardware twiddling
> language to be used by people writing things like kernel code --

And Python interpreters?

> 
> The fact that C ended up in the rather inappropriate role of
> a user-land application language is different problem.

In the early 80's, either C was the "appropriate language" or there was
none ... and that's coming from someone who wrote a commercial
Pascal compiler, runtime support, and debugger. I did it all in C.
Pascal, as we all know, was ill-conceived.  C++ was a momentous
advance, but it intensionally inherited many of C's warts.

I've forgotten what we are arguing about, but I'm sure I'm right.

J.


From simon.brunning at gmail.com  Tue Feb  8 10:00:45 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Tue, 8 Feb 2005 15:00:45 +0000
Subject: Loop in list.
In-Reply-To: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
References: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
Message-ID: <8c7f10c6050208070030bb428b@mail.gmail.com>

On Tue, 08 Feb 2005 06:50:31 -0800 (PST), Jim <jtp11 at att.net> wrote:
> Where did this type of structure come from:
> 
> mat = ['a' for i in range(3)]    ?
> 
> This will produce a list of three elements but
> I don't see reference for it in any of the books.

It's called a "List Comprehension". There's a good historical reason
for the name, but you can be excused in not having looked under that
name in the index. See
<http://www.amk.ca/python/2.0/index.html#SECTION000600000000000000000>
for details.

They *should* be mentioned in most books, provided that it's vaguely
recent and covers Python 2.0 or later.

List comps have a cool new little sister, generator expressions - see
<http://www.brunningonline.net/simon/blog/archives/001025.html>.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From theller at python.net  Wed Feb 23 02:48:10 2005
From: theller at python.net (Thomas Heller)
Date: Wed, 23 Feb 2005 08:48:10 +0100
Subject: how to interrupt time.sleep ?
References: <19k4miq1ddzn9.11addj27xoc2w$.dlg@40tude.net>
Message-ID: <k6ozson9.fsf@python.net>

BOOGIEMAN <BOOGIEMANPN at YAHOO.COM> writes:

> I have line  "time.sleep(60)"  in my code
>
> How do I cancel waiting 60 seconds if I want to continue with program 
> imediately  ? Like "Press some button if you don't want to wait"
>
> If it can't be canceled what's the other solution to 
> "wait certain time/or press any button to continue" problem ?

On windows at least, pressing ^C interrupts time.sleep().

print "Press ^C if you don't want to wait"
try:
    time.sleep(60)
except KeyboardInterrupt:
    pass

Thomas



From apardon at forel.vub.ac.be  Mon Feb 28 05:11:24 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 28 Feb 2005 10:11:24 GMT
Subject: Why do descriptors (and thus properties) only work on
	attributes.
References: <slrnd25nve.d87.apardon@rcpc42.vub.ac.be>
	<7xoee5kpiv.fsf@ruckus.brouhaha.com>
	<slrnd25pj4.d87.apardon@rcpc42.vub.ac.be>
	<38g8hvF5oc44qU1@individual.net>
Message-ID: <slrnd25ric.d87.apardon@rcpc42.vub.ac.be>

Op 2005-02-28, Diez B. Roggisch schreef <deetsNOSPAM at web.de>:
> Antoon Pardon wrote:
>
>> Op 2005-02-28, Paul Rubin schreef <http>:
>>> Antoon Pardon <apardon at forel.vub.ac.be> writes:
>>>> Can anyone explain why descriptors only work when they are an attribute
>>>> to an object or class.  I think a lot of interesting things one can
>>>> do with descriptors would be just as interesting if the object stood
>>>> on itself instead of being an attribute to an other object.
>>>
>>> How would that work?
>> 
>> Well AFAIU a descriptor is an object with at least one method out of
>> __get__, __set__ or __del__. I don see why implicitly calling one
>> of these methods would be any more difficult when they are autonomous
>> objects than when they are attributes.
>
> I still don't see how that is supposed to work for "a lot of interesting
> things". Can you provide examples for one of these interesting things?

Lazy evaluation where the value of something is calculated the first
time it is needed but accessed from some storage if it is needed again.

-- 
Antoon Pardon


From 18k11tm001 at sneakemail.com  Fri Feb 11 20:19:30 2005
From: 18k11tm001 at sneakemail.com (18k11tm001 at sneakemail.com)
Date: 11 Feb 2005 17:19:30 -0800
Subject: pre-check for string-to-number conversion
In-Reply-To: <l72dnUDS-dGbopDfRVn-hQ@comcast.com>
References: <1108163692.700703.183870@o13g2000cwo.googlegroups.com>
	<l72dnUDS-dGbopDfRVn-hQ@comcast.com>
Message-ID: <1108171170.585372.3660@f14g2000cwb.googlegroups.com>

Yes, I suppose exceptions are the best way to handle this problem.
Thanks.



From jackdied at jackdied.com  Fri Feb  4 10:59:29 2005
From: jackdied at jackdied.com (Jack Diederich)
Date: Fri, 4 Feb 2005 10:59:29 -0500
Subject: OT: why are LAMP sites slow?
In-Reply-To: <7xacqkc0uq.fsf@ruckus.brouhaha.com>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<opslnkqsjo6yt6e7@news.cisco.com>
	<7xhdktt36q.fsf@ruckus.brouhaha.com>
	<opslnr3rbs6yt6e7@news.cisco.com>
	<7xacqkc0uq.fsf@ruckus.brouhaha.com>
Message-ID: <20050204155929.GC1607@performancedrivers.com>

On Thu, Feb 03, 2005 at 10:09:49PM -0800, Paul Rubin wrote:
> aurora <aurora00 at gmail.com> writes:
> > I'm lost. So what do you compares against when you said LAMP is slow?
> > What  is the reference point? Is it just a general observation that
> > slashdot is  slower than we like it to be?
[reordered Paul's email a bit]

> > If you mean MySQL or SQL database in general is slow, there are truth
> > in  it. The best thing about SQL database is concurrent access,
> > transactional  semantics and versatile querying. Turns out a lot of
> > application can  really live without that. If you can rearchitect the
> > application using  flat files instead of database it can often be a
> > big bloom.
> 
> This is the kind of answer I had in mind.

*ding*ding*ding*  The biggest mistake I've made most frequently is using
a database in applications.  YAGNI.  Using a database at all has it's
own overhead.  Using a database badly is deadly.  Most sites would
benefit from ripping out the database and doing something simpler.
Refactoring a database on a live system is a giant pain in the ass,
simpler file-based approaches make incremental updates easier.

The Wikipedia example has been thrown around, I haven't looked at the
code either;  except for search why would they need a database to
look up an individual WikiWord?  Going to the database requires reading
an index when pickle.load(open('words/W/WikiWord')) would seem sufficient.

> Yes, that's the basic observation, not specifically Slashdot but for
> lots of LAMP sites (some PHPBB sites are other examples) have the same
> behavior.  You send a url and the server has to grind for quite a
> while coming up with the page, even though it's pretty obvious what
> kinds of dynamic stuff it needs to find.  Just taking a naive approach
> with no databases but just doing everything with in-memory structures
> (better not ever crash!) would make me expect a radically faster site.
> For a site like Slashdot, which gets maybe 10 MB of comments a day,
> keeping them all in RAM isn't excessive.  (You'd also dump them
> serially to a log file, no seeking or index overhead as this happened.
> On server restart you'd just read the log file back into ram).

You're preaching to the choir, I don't use any of the fancy stuff in
Twisted but the single threaded nature means I can keep everything in
RAM and just serialize changes to disk (to survive a restart).
This allows you to do very naive things and pay no penalty. My homespun
blogging software isn't as full featured as Pybloxsom but it is a few 
hundred times(!) faster.  Pybloxsom pays a high price in file stats
because it allows running under CGI.  Mine would too as a CGI but it
isn't so *shrug*.

> > A lot of these is just implementation. Find the right tool and the
> > right design for the job. I still don't see a case that LAMP based
> > solution is inherently slow.
> 
> I don't mean LAMP is inherently slow, I just mean that a lot of
> existing LAMP sites are observably slow.

A lot of these are just implementation.  Going the dumb non-DB way won't
prevent you from making bad choices but if a lot of bad choices are made
simply because of the DB (my assertion) dropping the DB would avoid
some bad choices.  I think Sourceforge has one table for all project's
bugs & patches.  That means a never used project's bugs take up space
in the index and slow down access to the popular projects.  Would a
naive file-based implementation have been just as bad?  maybe.

If there is interest I'll follow up with some details on my own LAMP
software which does live reports on gigs of data and - you guessed it -
I regret it is database backed.  That story also involves why I started
using Python (the prototype was in PHP).

-Jack


From ncoghlan at iinet.net.au  Tue Feb  8 05:37:15 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Tue, 08 Feb 2005 20:37:15 +1000
Subject: variable declaration
In-Reply-To: <just-5FC6DF.10332608022005@news1.news.xs4all.nl>
References: <4202A022.3050209@netscape.net>	<MSGID_2=3A5025=2F3.131_4204b0a9@fidonet.org>	<mailman.1978.1107622451.22381.python-list@python.org>	<slrnd0epjg.26q.apardon@rcpc42.vub.ac.be>	<mailman.2069.1107783321.22381.python-list@python.org>	<slrnd0esqn.26q.apardon@rcpc42.vub.ac.be>	<mailman.2152.1107854937.22381.python-list@python.org>
	<just-5FC6DF.10332608022005@news1.news.xs4all.nl>
Message-ID: <4208965B.4010309@iinet.net.au>

Just wrote:
> In article <mailman.2152.1107854937.22381.python-list at python.org>,
>  Nick Coghlan <ncoghlan at iinet.net.au> wrote:
> 
> 
>>Antoon Pardon wrote:ons already existing.
>>
>>>The compilor might generate a RESTORE instruction.
>>
>>Whether it is done as a LOAD/STORE or a RESTORE, it has to perform the same 
>>work 
>>- check the name exists in the local namespace, and throw an exception if it 
>>doesn't. If it the name does exist, perform a normal store operation.
> 
> 
> But the compiler would _know_ in which scope the variable was defined, 
> no?

I wouldn't expect the behaviour of name rebinding to be any different from other 
forms of augmented assignment as far as the existence of the left-hand side goes.

Py> def f():
...   x += 1
...
Py> f()
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "<stdin>", line 2, in f
UnboundLocalError: local variable 'x' referenced before assignment

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From cjbottaro at alumni.cs.utexas.edu  Tue Feb 15 18:34:42 2005
From: cjbottaro at alumni.cs.utexas.edu (Christopher J. Bottaro)
Date: Tue, 15 Feb 2005 17:34:42 -0600
Subject: super not working in __del__  ?
Message-ID: <cuu0pu$t44$1@sea.gmane.org>

I get this exception when I run the following code:

Exception exceptions.TypeError: 'super() argument 1 must be type, not None'
in <bound method Txrposdn.__del__ of <__main__.Txrposdn object at
0xf6f7118c>> ignored

Here is the code:

class Txrposdn(PRI.BasicBatch):

  def __init__(self, *argv):
    super(Txrposdn, self).__init__(*argv)

  def __del__(self):
    super(Txrposdn, self).__del__()

if __name__ == "__main__":
  prog = Txrposdn(args)
  prog.go()


The weird thing is that if move that last code segment into its own
function, the exception doesn't happen:

def main():
  prog = Txrposdn(args)
  prog.go()

if __name == "__main__":
  main()

What is going on?  Thanks for the help.



From xeoicq at netscape.net  Mon Feb 14 04:31:06 2005
From: xeoicq at netscape.net (xeoicq at netscape.net)
Date: 14 Feb 2005 01:31:06 -0800
Subject: keep a local COM Server alive
Message-ID: <1108373466.005539.302110@g14g2000cwa.googlegroups.com>

I wrote a COM server in Python where all the clients use the same
global object(test_obj). So far it works, but when the last client is
closed the Python COM enviornment is closed and the global object is
lost. How can I prevent that?
I need that new clients use the same global object and not a new
created one. I figured out a workaround, but there must be another
solution.

The code looks like:

class test:
    .....

test_obj=test()

class test_f:
    _reg_clsid_ = ...
    _reg_progid_ = "test.cl"
    _reg_clsctx_ = pythoncom.CLSCTX_LOCAL_SERVER
    _public_methods_ = ...


    def __init__(self):
         self.delegate=test_obj
         .....
    .....
    .....

#####Workaround to keep pythoncom alive
if not __name__=='__main__':
    import win32com.client
    dummy=win32com.client.Dispatch("test.cl")
#############################################

if __name__=='__main__':
    import win32com.server.register
    win32com.server.register.UseCommandLine(test_f, debug=0)



From jelleferinga at gmail.com  Tue Feb  1 11:01:55 2005
From: jelleferinga at gmail.com (jelle)
Date: 1 Feb 2005 08:01:55 -0800
Subject: pythonic equivalent of Mathematica's FixedPoint function
In-Reply-To: <1107273234.276714.272890@z14g2000cwz.googlegroups.com>
References: <1107273234.276714.272890@z14g2000cwz.googlegroups.com>
Message-ID: <1107273715.614766.32810@f14g2000cwb.googlegroups.com>

doh...

https://sourceforge.net/projects/fixedpoint

pardon me



From joyner.david at comcast.net  Fri Feb 18 23:44:59 2005
From: joyner.david at comcast.net (David Joyner)
Date: Fri, 18 Feb 2005 23:44:59 -0500
Subject: newbie question on python 2.4 and tkinter
In-Reply-To: <mailman.2770.1108671387.22381.python-list@python.org>
References: <mailman.2770.1108671387.22381.python-list@python.org>
Message-ID: <4216C44B.6010009@comcast.net>

Hi:
I'm trying to compile python 2.4 with tkinter.
(I'm trying to write a gui interface which
calls a program called GAP - I'm hoping to use
subprocess, a python 2.4 module, since I was getting
deadlocks using popen).

The instructions at the python web site said basically
to edit the /Modules/Setup file and recompile.
The edits consist of determining with location of various
Tcl/Tk libraries, header files, etc. I was wondering if
anyone could help out with how to determine these.
I have a suse 9.1 box and a new debian laptop, both of which
I would like to configure with python 2.4 and tkinter.
- David Joyner


From ilias at lazaridis.com  Thu Feb 17 12:46:54 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Thu, 17 Feb 2005 19:46:54 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <421284dc$0$14312$626a14ce@news.free.fr>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr>
	<XX+64LRqnLECFwAV@objmedia.demon.co.uk>
	<cut6t9$sla$1@usenet.otenet.gr>
	<42123751$0$10042$626a14ce@news.free.fr>
	<cutem3$2t6$2@usenet.otenet.gr>
	<421244f0$0$30339$636a15ce@news.free.fr>
	<cutipk$l5a$1@usenet.otenet.gr>
	<421284dc$0$14312$626a14ce@news.free.fr>
Message-ID: <cv2lae$cat$4@usenet.otenet.gr>

Bruno Desthuilliers wrote:
[...]

closing thread
http://groups-beta.google.com/group/comp.lang.python/msg/f2ae9cdbe16676d1

.

-- 
http://lazaridis.com


From tim.leeuwvander at nl.unisys.com  Thu Feb  3 02:41:25 2005
From: tim.leeuwvander at nl.unisys.com (Leeuw van der, Tim)
Date: Thu, 3 Feb 2005 08:41:25 +0100
Subject: Crashing Python interpreter! (windows XP, python2.3.4, 2.3.5rc1,
	2.4.0)
Message-ID: <BF88DF69D9E2884B9BE5160DB2B97A8544B0D2@nlshl-exch1.eu.uis.unisys.com>


-----Original Message-----
From: python-list-bounces+tim.leeuwvander=nl.unisys.com at python.org on behalf of John Machin
Sent: Thu 2/3/2005 12:03 AM
To: python-list at python.org
Subject: Re: Crashing Python interpreter! (windows XP, python2.3.4, 2.3.5rc1,2.4.0)
 

> Leeuw van der, Tim TOP-POSTED:
> > Hi all,
> >
[...]
> >
> > Leeuw van der, Tim schrieb:
> > > I'm using the following combination of software:
> > > - Pydev Eclipse plugin (pydev 0.8.5)
> > > - eclipse 3.0.1
> > > - windows XP SP1
> > > - pygtk 2.4.1
> > > - GTK 2.6.1 (for windows32 native)
> >
> > > When trying to get a list of possible completions for the 'gtk'
> import object, the python interpreter crashes. Happens with all
> versions listed in the subject: python 2.3.4, 2.3.5rc1, 2.4.0.
> > 
> 
> Do you have a file called drwtsn32.log anywhere on your computer?

No, unfortunately I cannot find such file anywhere on my computer....

What do I do to get such file? Or anything equally useful?

--Tim


From duncan.booth at invalid.invalid  Sun Feb  6 06:26:58 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 6 Feb 2005 11:26:58 GMT
Subject: dynamic func. call
References: <ctvrdk$evf$1@bagan.srce.hr>
	<1107536928.150898.114000@o13g2000cwo.googlegroups.com>
Message-ID: <Xns95F57470359F6duncanrcpcouk@127.0.0.1>

ajikoe at gmail.com wrote:

> Try this:
> 
> def myfunc():
>   print "helo"
> 
> s = "myfunc()"
> a = eval(s)
> 

No, please don't try that. Good uses for eval are *very* rare, and this 
isn't one of them.

Use the 'a = locals()[x]()' suggestion (or vars() instead of locals()), or 
even better put all the functions callable by this method into a class and 
use getattr() on an instance of the class.

A Pythonic way to do this sort of thing is to put all the functions that 
are callable indirectly into a class and give them names which contain a 
prefix to make it obvious that they are callable in this way and then add 
the prefix onto the string:

class C:
   def command_myfunc(self):
      return 42

   def default_command(self):
      raise NotImplementedError('Unknown command')

   def execute(self, s):
      return getattr(self, 'command_'+s, self.default_command)()

commands = C()
print commands.execute('myfunc')

That way you can be quickly tell which functions can be called indirectly 
and which can't; you can control what happens when no suitable function 
exists; and you can easily extend the functionality by subclassing your 
base class.


From jeff at ccvcorp.com  Wed Feb  9 12:36:55 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Wed, 09 Feb 2005 09:36:55 -0800
Subject: interactive execution
In-Reply-To: <4209845C.EB468DC1@yahoo.com>
References: <42096A7A.2D8CF4E1@yahoo.com> <110isa55vfvhr79@corp.supernews.com>
	<42098308.7F0C6A41@yahoo.com> <4209845C.EB468DC1@yahoo.com>
Message-ID: <110kifce0as6cd9@corp.supernews.com>

Jive Dadson wrote:
> Yeah.  I got it.
> 
> exec "foo = 555" in globals(), locals() does the trick.

You can do it with your own dicts, too -- but they must already exist, 
exec doesn't create them out of nowhere.

 >>> myglobals = {'a':2, 'b':5}
 >>> mylocals = {'c': 3}
 >>> exec "d = a * b + c" in myglobals, mylocals
 >>> myglobals
{'a': 2, '__builtins__': {...}, 'b': 5}
 >>> mylocals
{'c': 3, 'd': 13}
 >>>

This gives you some control over what the exec'ed statement actually 
sees, as well as what happens with the results.  (But as I mentioned 
before, there is no real security here if you're exec'ing arbitrary 
code -- there's no sandboxing involved, and the exec'ed string *can* 
use that __builtins__ reference (among other things) to do all sorts 
of malicious stuff.)

Jeff Shannon
Technician/Programmer
Credit International



From greg.lindstrom at novasyshealth.com  Wed Feb 23 08:40:14 2005
From: greg.lindstrom at novasyshealth.com (Greg Lindstrom)
Date: Wed, 23 Feb 2005 07:40:14 -0600
Subject: Fonts and PIL
Message-ID: <421C87BE.7050903@novasyshealth.com>

Hello-
I'm running Python 2.3 on a windows box and would like to use PIL to 
superimpose text over an existing pgn image.  I have no problem getting 
the text on the image but can not figure out how to manage fonts.  How 
to set the font style and size.  From reading the archives I surmise 
that I want to work with *.pil files.  I've searched my box for the font 
files but did not find them.  I've googled for information on pil font 
files and it appears to be involved with Zope.  So, can any of you 
honcho-level types help me out?  How can I set font size and style in my 
PIL application?

Thanks again!
--greg

-- 
Greg Lindstrom               501 975.4859
Computer Programmer          greg.lindstrom at novasyshealth.com
NovaSys Health
Little Rock, Arkansas

"We are the music makers, and we are the dreamers of dreams."  W.W.



From alan.gauld at btinternet.com  Sun Feb 27 04:07:28 2005
From: alan.gauld at btinternet.com (Alan Gauld)
Date: Sun, 27 Feb 2005 09:07:28 +0000 (UTC)
Subject: lambda strangeness??
Message-ID: <v73321hkh2v7bhrnj7enet296entdj5drb@4ax.com>

I was playing with lambdas and list compregensions and came
across this unexpected behaviour:

>>> adds = [lambda y: (y + n) for n in range(10)]
>>> adds[0](0)
9
>>> for n in range(5): print adds[n](42)
...
42
43
44
45
46
>>> adds[0](0)
4

Can anyone explain the different answers I'm getting?
FWIW the behaviour I expected was what seems to happen inside 
the for loop... It seems to somehow be related to the 
last value in the range(), am I somehow picking that up as y?
If so why? Or is that just a coincidence? And why did it work
inside the for loop?

Puzzled,

Alan G.
Author of the Learn to Program website
http://www.freenetpages.co.uk/hp/alan.gauld


From danperl at rogers.com  Fri Feb  4 00:12:23 2005
From: danperl at rogers.com (Dan Perl)
Date: Fri, 4 Feb 2005 00:12:23 -0500
Subject: advice needed for simple python web app
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
	<1107491985.187092.268580@o13g2000cwo.googlegroups.com>
Message-ID: <fumdnTMVHJWhmZ7fRVn-gw@rogers.com>


"M.E.Farmer" <mefjr75 at hotmail.com> wrote in message 
news:1107491985.187092.268580 at o13g2000cwo.googlegroups.com...
>I am no web expert but have recently used cherrypy to 'webify' a
> script. It is very easy to get going and has its own server or can be
> run behind Apache.
> The only real problem I see is that the docs are still a little lite
> for the new 2.0 series ,but they do have a newsgroup where the author
> still answers questions.
> Cherrypy2 is fairly logical and most of it is covered in the examples
> on there website.
> I can not speak for the other packages,have not used them yet ;)
> hth,
> M.E.Farmer

Thanks.  I am no web expert either so I appreciate advice coming from 
someone who was in a similar situation.

Twisted and CherryPy seemed to me to be the main choices based on what I 
understand from their front pages with my limited knowledge on web apps. 
Twisted feels more "developed" but also more complex at the same time.  I 
wanted opinions before I invest the time in studying either one of them. 
Your opinion helps.

Dan 




From Serge.Orlov at gmail.com  Tue Feb 22 11:37:44 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: 22 Feb 2005 08:37:44 -0800
Subject: UTF-8 / German,
	Scandinavian letters - is it really this difficult?? Linux &
	Windows XP
References: <cve1vh$c37$1@phys-news1.kolumbus.fi>
	<5339b60d.0502220700.3ec7ae56@posting.google.com>
Message-ID: <1109090264.676680.99150@o13g2000cwo.googlegroups.com>

Paul Boddie wrote:
> One side-effect of the "big push" to UTF-8 amongst the Linux
> distribution vendors/maintainers is the evasion of issues such as
> filesystem encodings and "real" Unicode at the system level. In
> Python, when you have a Unicode object, you are dealing with
> idealised
> sequences of characters, whereas in many system and library APIs out
> there you either get back a sequence of anonymous bytes or a sequence
> of UTF-8 bytes that people are pretending is Unicode, right up until
> the point where someone recompiles the software to use UTF-16
> instead,
> thus causing havoc. Anyone who has needed to expose filesystems
> created by Linux distributions before the UTF-8 "big push" to later
> distributions can attest to the fact that the "see no evil" brass
> monkey is wearing a T-shirt with "UTF-8" written on it.

Unfortunately the monkey is painted in the air with a stick, so
not everyone can see it. Python can't. Given a random linux system
how can you tell if the monkey has pushed it already or not?

  Serge.



From tjreedy at udel.edu  Mon Feb 14 12:31:42 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 14 Feb 2005 12:31:42 -0500
Subject: Problem with nested lists as arrays
References: <1108382521.266024.281620@g14g2000cwa.googlegroups.com>
Message-ID: <cuqn5d$agf$1@sea.gmane.org>


<benjamin.cordes at blawrc.de> wrote in message 
news:1108382521.266024.281620 at g14g2000cwa.googlegroups.com...

'Having trouble' is too vague to figure out.  However, I would delete this:

>    def getEmptySlot(self):
>        i = 0
>        j = 0
>        while i  <= self.dim-1:
>            while j  <= self.dim-1:
>                if self.elements[j][i] == -1:
>                    return [j, i]
>                j = j+1
>            j = 0
>            i = i + 1

and maintain an .empty attribute, which is trivially updated in

>    def swapElements(self, fromx, fromy, tox, toy):
>        dummy = self.elements[toy][tox]
>
>        self.elements[toy][tox] = self.elements[fromy][fromx]
>        self.elements[fromy][fromx] = dummy

as (fromy,fromx).  Note that there is no need to pass tox, toy to this 
routine.  Indeed, I would include the last two lines in your move routine. 
Since dummy is always the same object, I would also just keep it as 
self._dummy instead of looking it up each time.

Terry J. Reedy







From ilias at lazaridis.com  Tue Feb 15 14:25:48 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 21:25:48 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2643.1108495246.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr>	<cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr>	<cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr>	<cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr>	<37bkemF5a7s7vU1@individual.net>
	<cut6nh$rpk$1@usenet.otenet.gr>	<86ll9piuj8.fsf@guru.mired.org>
	<cutf1h$576$1@usenet.otenet.gr>
	<mailman.2643.1108495246.22381.python-list@python.org>
Message-ID: <cutibq$j8e$1@usenet.otenet.gr>

Adam DePrince wrote:
> On Tue, 2005-02-15 at 13:29, Ilias Lazaridis wrote:
>>Mike Meyer wrote:
>>>Ilias Lazaridis <ilias at lazaridis.com> writes:
[...]
>>MinGW compatibility is not [only] my need.
>>
>>It is an community need [at least partially]
> 
> And herein lies the beauty of the noble meritocratic free software
> movement.  
> 
> If the community needs it, a member of said community has both complete
> unfettered freedom and a supportive environment to make it.   

Which is this "supportive environment"?

> Any amount
> of success at such an endeavor, even a feeble failure of an attempt,
> would bring kudos the hero who attempts such a feat and possibly
> organize unfathomable resources in the attendance of such a lofty goal.
> 
> Make us proud Ilias.  But whatever you do, don't beg.

I don't beg.

If you think this, than please reread the thread (or at least the 
root-trunk)

> Adam DePrince 

.

-- 
http://lazaridis.com


From erikbethke at gmail.com  Mon Feb 21 11:36:54 2005
From: erikbethke at gmail.com (Erik  Bethke)
Date: 21 Feb 2005 08:36:54 -0800
Subject: detecting the change in desktop resolution - how?
Message-ID: <1109003814.313466.85180@l41g2000cwc.googlegroups.com>

Hello All,

I am trying to clean up some polish bugs with the Shanghai game I am
working on and I am currently stuck on trying to get the right event
for detecting when the user has changed the desktop resolution.

I have tried trapping the following events:

1) SDL_ACTIVEEVENT
2) SDL_VIDEOEXPOSE    3) SDL_VIDEORESIZE

These are the events that are passed through to pygame as
pygame.ACTIVEEVENT and so on...

#3 - SDL_VIDEORESIZE  This is what I looked at first and I was wrong,
this is only for the WINDOW being resized... not the desktop resoltion

#2 - SDL_VIDEOEXPOSE  After watching the events in a debugger when I
change the desktop resolution I find out that this IS the event that is
generated from changing the desktop resolution.  Okay no problem right?
 Time to call:

self.screen = self.pygame.display.set_mode( size )

and draw() again right?

Well sure, now my game repaints properly when the desktop resolution
changes.  So What is the problem?  Well now EVERY TIME another window
draws on top of my game's window a SDL_VIDEOEXPOSE event is triggered.
There does not appear to be any flags associated with this event.  So I
am having trouble distinguishing from an overlapping window and
changing the desktop resolution.

So I tried this:

1) call pygame.display.Info() at the startup of my game and save off
this structure
2) call it again after getting a SDL_VIDEOEXPOSE event and comparing to
see if it has changed at all.

The problem with this is that apparantly the VidInfo structure DOES NOT
change when changing desktop resolution...

So then I tried using SDL_ACTIVEEVENT and simply leaving the display
black and unpainted after the user changes the resolution until the
user rolls the mouse over the game window and bringing it back to
focus.

This works.  However, it gets annoying watching the screen repaint
everytime the window gains focus....

Do you guys have any leads for me to try?  This HAS to be a problem
solved many times before...

Thank you,
-Erik



From douardda at free.fr  Wed Feb  2 18:40:16 2005
From: douardda at free.fr (David Douard)
Date: Thu, 03 Feb 2005 00:40:16 +0100
Subject: continuous plotting with Tkinter
References: <42010f48$0$3408$5402220f@news.sunrise.ch>
Message-ID: <420161de$0$17053$626a14ce@news.free.fr>

Martin Blume wrote:

> I have a number-crunching application that spits out
> a lot of numbers. Now I'd like to pipe this into a python
> app and plot them using Tkinter, such as:
> $ number_cruncher | myplot.py
> But with Tkinter once  I call Tkinter's mainloop() I
> give up my control of the app and I can't continue to
> read in data from stdin.  Or can I? If so, how?
> 
> Regards
> Martin

Maybe the simpler is to run the Tk mainloop in a separate thread.
You may have a look a candygram which gives a very simple to use
multi-thread semantics (ala Haskell) and is simpler to use than the
threading module.




From ericjardim at gmail.com  Fri Feb 11 16:36:46 2005
From: ericjardim at gmail.com (Eric Jardim)
Date: 11 Feb 2005 13:36:46 -0800
Subject: PyQt documentation
In-Reply-To: <373u0qF58g57fU1@individual.net>
References: <1108088253.552834.44690@z14g2000cwz.googlegroups.com>
	<373it0F4uglf9U1@individual.net>
	<1108131643.216301.92510@o13g2000cwo.googlegroups.com>
	<373u0qF58g57fU1@individual.net>
Message-ID: <1108157806.674018.58490@l41g2000cwc.googlegroups.com>

[...]
> So maybe a better way for you would be to learn python by its own,
then
> trying to use it in conjunction with qt.
[...]

The purpose of doing this help is not to help *me*, but help *anyone*
who wants to use PyQt. I myself am quite confortable with the Qtdoc.

But there are cases that the PyQt doc and Qt doc are not enough.

This happened to me when I tryed to use the QTextStream objects. There
is nothing on the docs where it says that you cannot use this object
for writing. It is silly, but I had to search the web and send a
message to the mailing list to know that one *don't* use the Qt stream
classes for writing.

It may be silly, but is time comsumption and can confuse someone,
especially newbies.


[...]
> So again: I don't see the
> need for that doc. But that's IMHO, of course.
[...]

*You* may not need. But think about other people. By the way, I found 9
"I"s on your last message. Don't be that selfish :)

The proposal is up.

[Eric Jardim]



From kent37 at tds.net  Sat Feb 19 15:51:18 2005
From: kent37 at tds.net (Kent Johnson)
Date: Sat, 19 Feb 2005 15:51:18 -0500
Subject: could that be a mutable object issue ?
In-Reply-To: <mailman.2840.1108835906.22381.python-list@python.org>
References: <mailman.2840.1108835906.22381.python-list@python.org>
Message-ID: <4217a3b9$1_1@newspeer2.tds.net>

Philippe C. Martin wrote:
> If I do this:
> 
> 
> 
> print 'LEN OF BOOK BEFORE APPEND: ', len(pickle.dumps(self.__m_rw))
> self.__m_rw.books.append( [p_col1,p_col2,p_col3] )
> print 'LEN OF BOOK AFTER APPEND: ', len(pickle.dumps(self.__m_rw))
> 
> I get the same length before and after append.
> 
> when I print self.__m_rw.books, I see my 'appends' in there, yet the
> pickled object does not change.

How is __m_rw.books defined? If it is a class attribute of the class of __m_rw you will see this 
behavior. e.g.

  >>> class Mrw:
  ...   books = []
  ...
  >>> m=Mrw()
  >>> class Mrw:
  ...   books = []
  ...
  >>> __m_rw = Mrw()
  >>> __m_rw.books.append(1)
  >>> __m_rw.books
[1]

but __m_rw.books will not be pickled with __m_rw because it belongs to the class, not the instance.

The fix is to declare books as an instance attribute:

class Mrw:
   def __init__(self):
     self.books = []

Kent

> 
> Any clue ?
> 
> Thanks
> 
> 
> Philippe
> 
> 
> 


From fredrik at pythonware.com  Mon Feb 14 17:31:38 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 23:31:38 +0100
Subject: Python 2.4 unable to find module.
References: <1108419681.177120.219300@c13g2000cwb.googlegroups.com>
Message-ID: <cur8n7$t1h$1@sea.gmane.org>

<mfjacobs at gmail.com> wrote:

> Python built and installed fine.  PyXML built and installed with no
> complaining but, when I give the commands below it cannot find the
> module.
>
> Obviously Iam missing somehting.  Do you have any suggestions where to
> look for "pathing", Security or permissions problems?

did you use the Python you just built when installing PyXML?  (if you used
a different version, PyXML was probably installed somewhere else)

try running

    $ python -v -v -c "from xml.dom.ext.reader import Sax2"

and check that Python looks for the ext.reader where you expect it to be
(if you're not sure where PyXML installed itself, run the installation script
again and check the output carefully)

</F> 





From martin at v.loewis.de  Thu Feb 17 04:40:17 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 17 Feb 2005 10:40:17 +0100
Subject: Help with C extensions under VC6 / WinXP and Python 2.4
In-Reply-To: <mailman.2731.1108605453.22381.python-list@python.org>
References: <mailman.2731.1108605453.22381.python-list@python.org>
Message-ID: <42146681.8000407@v.loewis.de>

Scott wrote:
> I'm specifically trying to perform step 6. Creating a brand
> new project using VC6.

The instructions are outdated. Don't use VC6 to build
extension modules for Python 2.4.

Regards,
Martin


From harlinseritt at yahoo.com  Sat Feb 26 07:41:21 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 26 Feb 2005 04:41:21 -0800
Subject: function expression with 2 arguments
In-Reply-To: <1109419984.213993.49280@f14g2000cwb.googlegroups.com>
References: <1109419984.213993.49280@f14g2000cwb.googlegroups.com>
Message-ID: <1109421681.400554.116380@g14g2000cwa.googlegroups.com>

Not exactly sure what you're looking for but you can do the following:

def dosomething(numlist):
   return numlist[0] + numlist[1]

numlist = [ 5, 10]
val = dosomething(numlist)

If so, that would be somewhat pointless. It's always best to keep it
simple. It looks like the function you wrote above is very adequate for
the results you want returned.



From xah at xahlee.org  Wed Feb 16 16:55:02 2005
From: xah at xahlee.org (Xah Lee)
Date: 16 Feb 2005 13:55:02 -0800
Subject: [perl-python] problem: reducing comparison (correction)
In-Reply-To: <1108471704.220626.27530@g14g2000cwa.googlegroups.com>
References: <1108450348.253772.158120@z14g2000cwz.googlegroups.com>
	<1108471704.220626.27530@g14g2000cwa.googlegroups.com>
Message-ID: <1108590902.480489.122610@g14g2000cwa.googlegroups.com>


Xah Lee wrote:
> In imperative languages such as Perl and Python and Java, in general
it
> is not safe to delete elements when looping thru a list-like entity.
> (it screws up the iteration) One must make a copy first, and work
with
> the copy.

Correction:
When looping thru a list-like entity and delete elements in the vary
list, there's a question whether it will change the iteration. (For
example, if one loops thru 1 to 9, and deleted 8 while at 2, should the
loop still do 8?) For some languages and or list entities, the answer
may be yes or no. However, in imperative languages such as Perl and
Python and Java, often this is not allowed by the language, partially
as a protection to safeguard and assume programers as ignoramuses, but
partially because the internal issues of these languages can't handle
it.

The work around in these languages is always to make a copy of the
list-entity, and work with the copy.

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From harlinseritt at yahoo.com  Fri Feb 25 02:47:57 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 24 Feb 2005 23:47:57 -0800
Subject: wxpython tutorials
In-Reply-To: <1109309093.384392.59230@l41g2000cwc.googlegroups.com>
References: <1109309093.384392.59230@l41g2000cwc.googlegroups.com>
Message-ID: <1109317677.324835.119510@g14g2000cwa.googlegroups.com>

Here is the old one...
http://www.wxpython.org/tutorial.php

It truly is a short tutorial though. This one's even better:

http://wiki.wxpython.org/index.cgi/FrontPage

I am not a wxPython enthusiast. I like Tkinter much better. If you have
an interest, take a look at:
http://www.pythonware.com/library/tkinter/introduction/ by Frederik
Lundh. It is very easy to understand.

Tkinter is easier to learn. It is better documented IMO. Tkinter is
just as functional as any other GUI toolkit for Python. Creating your
own widget sets is usually a breeze. Tkinter is not ugly if done
properly. Tkinter apps are ported easily. On and on :-)



From sjuranic at gmail.com  Tue Feb 22 18:48:48 2005
From: sjuranic at gmail.com (Steve Juranich)
Date: Tue, 22 Feb 2005 16:48:48 -0700
Subject: python tutorial/projects
In-Reply-To: <cvgf2o$u42$1@agate.berkeley.edu>
References: <cvgf2o$u42$1@agate.berkeley.edu>
Message-ID: <56190b6c050222154816a2e2a3@mail.gmail.com>

I think the tutorial offered at www.python.org/tut/tut.html is as good
a starting place as any.

I wouldn't be able to suggest a "non-trivial" project without knowing
more about your background.  Can you do a flashcard program? recipe
organizer? SETI at Home client? (I think you see where this is going).

Good luck.

On Tue, 22 Feb 2005 15:23:37 -0800, Danny
<dannyant at kingkong.me.berkeley.edu> wrote:
> Does anyone know of a good python tutorial?
> I was also looking for some non-trivial projects to do in python.
> 
> Basically I would like to claim on my resume, that I know python, with
> out bad karma.
> 
> Danny
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From rschroev_nospam_ml at fastmail.fm  Thu Feb 17 09:51:29 2005
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Thu, 17 Feb 2005 14:51:29 GMT
Subject: os.walk()
In-Reply-To: <cv29o3$ror$1@solaris.cc.vt.edu>
References: <cv29o3$ror$1@solaris.cc.vt.edu>
Message-ID: <Rb2Rd.13888$G77.1043577@phobos.telenet-ops.be>

rbt wrote:
> The problem I run into is that some of the files and dirs are not
> removed while others are. I can be more specific and give exact examples
> if needed. On WinXP, 'pagefile.sys' is always removed, while
> 'UsrClass.dat' is *never* removed, etc.

Keep in mind that the comparisons are done case sensitive; are you sure
that there's no problem regarding uppercase/lowercase?

-- 
"Codito ergo sum"
Roel Schroeven


From robin at SPAMREMOVEjessikat.fsnet.co.uk  Sun Feb 20 12:46:25 2005
From: robin at SPAMREMOVEjessikat.fsnet.co.uk (Robin Becker)
Date: Sun, 20 Feb 2005 17:46:25 +0000
Subject: introspection inquiry
In-Reply-To: <cvaaae$77q$1@gemini.csx.cam.ac.uk>
References: <1108910710.985704.264430@c13g2000cwb.googlegroups.com>
	<4218A579.2060503@jessikat.fsnet.co.uk>
	<cvaaae$77q$1@gemini.csx.cam.ac.uk>
Message-ID: <4218CCF1.1050601@jessikat.fsnet.co.uk>

Michael Hoffman wrote:
> Robin Becker wrote:
> 
>> self.__class__.__name__
> 
> 
> Unless I misunderstood the question, that won't work. That will
> give you the name of the class the object is an instance is of.
> I think he wants the name of the class the method was defined in.
> 
> Here's a way to do that using metaclasses and Python's magic
> double-underscore attribute-mangling feature:
> 
> """
> class SelfKnowledge(type):
>     def __init__(cls, name, bases, dict):
>         setattr(cls, "_%s__%s" % (name, "class_name"), name)
>         type.__init__(cls, name, bases, dict)
> 
> class Nietzsche(object):
>     __metaclass__ = SelfKnowledge
> 
>     def __init__(self, text):
>         self.spam = text
>         print "In the constructor of the %s class" % self.__class_name
> 
> class Kierkegaard(Nietzsche):
>     def __init__(self, text):
>         print "Now in the constructor of %s" % self.__class_name
>         Nietzsche.__init__(self, text)
> 
> Nietzsche("Thus Spake Zarathustra")
> print
> 
> Kierkegaard("Fear and Trembling")
> """
> 
> $ python test1.py
> In the constructor of the Nietzsche class
> 
> Now in the constructor of Kierkegaard
> In the constructor of the Nietzsche class

I guess if you're right something along the lines of
import inspect
class A:
   _class_name=inspect.currentframe().f_code.co_name
   def __init__(self,text,_defining_class_name=_class_name):
     print 'text=',text,'_defining_class_name=',_defining_class_name

class B(A):
   pass
b=B('aaa')

==>text= aaa _defining_class_name= A


could work as well, but if we only need the local name why not just 
insert directly.
-- 
Robin Becker


From rt-announce-bounces at lists.bestpractical.com  Sun Feb 13 18:53:22 2005
From: rt-announce-bounces at lists.bestpractical.com (rt-announce-bounces at lists.bestpractical.com)
Date: Sun, 13 Feb 2005 18:53:22 -0500
Subject: Your message to RT-Announce awaits moderator approval
Message-ID: <mailman.879.1108338802.22590.rt-announce@lists.bestpractical.com>

Your mail to 'RT-Announce' with the subject

    Delivery service mail

Is being held until the list moderator can review it for approval.

The reason it is being held:

    Post by non-member to a members-only list

Either the message will get posted to the list, or you will receive
notification of the moderator's decision.  If you would like to cancel
this posting, please visit the following URL:

    http://lists.bestpractical.com/cgi-bin/mailman/confirm/rt-announce/e66d287ed65ec6d7a8c42491896433657fa0c0a6



From samantha7395 at hotmail.com  Sat Feb 19 12:12:28 2005
From: samantha7395 at hotmail.com (Samantha)
Date: Sat, 19 Feb 2005 09:12:28 -0800
Subject: Probably over my head... Trying to get Font Names
References: <B8KdneiuyLaKoYjfRVn-vQ@adelphia.com>	<mailman.2786.1108689703.22381.python-list@python.org><8oydnSIY04Xby4jfRVn-iA@adelphia.com>	<mailman.2810.1108749030.22381.python-list@python.org><JpydncCe2to2sovfRVn-og@adelphia.com>
	<mailman.2816.1108754431.22381.python-list@python.org>
Message-ID: <BoudnS1AN6Dm7orfRVn-rg@adelphia.com>

Mike I did get the last msg. Still trying to get things under control.....
S
"Mike C. Fletcher" <mcfletch at rogers.com> wrote in message 
news:mailman.2816.1108754431.22381.python-list at python.org...
> Samantha wrote:
>
>>Mike,
>>Not sure why that email bounced.
>>
> That last one bounced too, btw.
>
>>I downloaded these files:
>>WinTTX2.0b1.exe
>>TTFQuery-1.0.0.win32.exe
>>numarray-1.1.1.win32-py2.4.exe
>>
>>They all seemed to install. Is WinTTX2.0b1.exe not the fontTools file?
>>
> I believe WinTTX is a font-editing program from which fontTools was split 
> out into a separate project.
>
> As well, though I don't *know* that this will cause problems, I'd thought 
> fontTools required Numeric (Numpy) rather than Numarray.  Would try the 
> fontTools package first with the Numarray you've installed, and if you 
> then find problems with it not being able to find Numeric, install the 
> Numpy release.
>
> HTH,
> Mike
>
> ________________________________________________
>  Mike C. Fletcher
>  Designer, VR Plumber, Coder
>  http://www.vrplumber.com
>  http://blog.vrplumber.com
>                              PyCon is coming...
> 




From s.varun at gmail.com  Thu Feb 24 21:18:09 2005
From: s.varun at gmail.com (Varun)
Date: 24 Feb 2005 18:18:09 -0800
Subject: Python Online Programming Contest
In-Reply-To: <mailman.3023.1109283350.22381.python-list@python.org>
References: <1109278779.955986.193860@z14g2000cwz.googlegroups.com>
	<mailman.3023.1109283350.22381.python-list@python.org>
Message-ID: <1109297889.083424.294860@z14g2000cwz.googlegroups.com>

Hi,
It is open for anyone across the world. All times are local ( GMT
+5:30). The contest will be on Feb 27 (this sunday) and i will ensure
that the times are clearly specified.
-Varun



From irmen.NOSPAM at xs4all.nl  Fri Feb 18 16:42:25 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Fri, 18 Feb 2005 22:42:25 +0100
Subject: unicode and socket
In-Reply-To: <opsmeqf1w76yt6e7@news.cisco.com>
References: <1108753426.318777.275250@c13g2000cwb.googlegroups.com>
	<opsmeqf1w76yt6e7@news.cisco.com>
Message-ID: <42166231$0$28988$e4fe514c@news.xs4all.nl>

aurora wrote:
> You could not. Unicode is an abstract data type. It must be encoded 
> into  octets in order to send via socket. And the other end must decode 
> the  octets to retrieve the unicode string. Needless to say the encoding 
> scheme  must be consistent and understood by both ends.

So use pickle.

--Irmen


From maxwell at ldc.upenn.edu  Wed Feb 16 21:58:42 2005
From: maxwell at ldc.upenn.edu (maxwell at ldc.upenn.edu)
Date: 16 Feb 2005 18:58:42 -0800
Subject: Problem using/installing numarray
Message-ID: <1108609122.631534.50720@g14g2000cwa.googlegroups.com>

I'm trying to use the 'numarray' package (v1.1.1) under Python 2.4
running under CygWin.

I initially downloaded the Windows executable version of the numarray
package, and installed it under C:\program
files\python\lib\site-packages.  That works with the Windows version of
Python, but not the CygWin version, where it fails with the msg:
   ImportError: No module named _conv
The file _conf.pyd exists, but my guess is that the .pyd suffix is not
recognized under the CygWin version of Python.  (But that doesn't make
sense...)

So I decided to download the .tgv version of the numarray package into
/lib/site-packages (under my CygWin dir), and build it.  Unfortunately,
the build fails with the msg:

   building 'numarray._conv' extension
   gcc -shared -Wl,--enable-auto-image-base \
   build/temp.cygwin-1.5.12-i686-2.4/Src/_convmodule.o \
   -L. -lpython2.4 -o \
   build/lib.cygwin-1.5.12-i686-2.4/numarray/_conv.dll \
   -L/lib -lm -lc -lgcc -L/lib/mingw -lmingwex

/usr/lib/gcc-lib/i686-pc-cygwin/3.3.3/../../../../i686-pc-cygwin/bin/ld:
\
   cannot find -lpython2.4
   collect2: ld returned 1 exit status
   error: command 'gcc' failed with exit status 1

(I've tried to indicate the wrapped lines above by continuing them with
"\", but no guarantees this won't wrap again...)

At first I thought this was a problem with a path, but even hard coding
the path at the command line doesn't seem to work:

   > gcc -l/lib/python2.4

/usr/lib/gcc-lib/i686-pc-cygwin/3.3.3/../../../../i686-pc-cygwin/bin/ld:
\
   cannot find -l/lib/python2.4

I have a _directory_ /lib/python2.4, but it sounds like gcc is looking
for some kind of library file.

Suggestions?

   Mike Maxwell



From mjackson at alumni.caltech.edu  Thu Feb  3 08:36:40 2005
From: mjackson at alumni.caltech.edu (Mark Jackson)
Date: 3 Feb 2005 13:36:40 GMT
Subject: global variables
References: <1107385488.822768.317250@l41g2000cwc.googlegroups.com>
	<1107388493.465599.140480@g14g2000cwa.googlegroups.com>
	<3YSdnYVEmOCW8pzfRVn-sg@comcast.com>
	<1107391350.933650.321440@z14g2000cwz.googlegroups.com>
	<1107392092.290042.221600@c13g2000cwb.googlegroups.com>
	<pqpMd.102688$Jk5.95091@lakeread01>
Message-ID: <ctt9d8$brb$1@news.wrc.xerox.com>

Steve Holden <steve at holdenweb.com> writes:
> M.E.Farmer wrote:
> 
> > Ok it has been a long day,
> > In my reply to Steven Bethard , Steve should read Steven ;)
> > 
> > M.E.Farmer
> > 
> Well, since he signs himself "Steve" too I guess we'll just have to put 
> up with the ambiguities. Or perhaps, given my (lack of) typing skill, I 
> should just start signing myself "Stvev"?

What's this doing *here*?  I thought the discussion of the pitfalls of
name rebinding was taking place in the "variable declaration" thread.

-- 
Mark Jackson - http://www.alumni.caltech.edu/~mjackson
	People who write obscurely are either unskilled in writing
	or up to mischief.		- Sir Peter Medawar




From http  Tue Feb 15 22:48:32 2005
From: http (Paul Rubin)
Date: 15 Feb 2005 19:48:32 -0800
Subject: SHA1 broken
Message-ID: <7xvf8t17xr.fsf_-_@ruckus.brouhaha.com>

FYI.
>From <http://www.schneier.com/blog/archives/2005/02/sha1_broken.html>:

    The research team of Xiaoyun Wang, Yiqun Lisa Yin, and Hongbo Yu
    (mostly from Shandong University in China) have been quietly
    circulating a paper announcing their results:

        * collisions in the the full SHA-1 in 2**69 hash operations, much
          less than the brute-force attack of 2**80 operations based on
          the hash length.

        * collisions in SHA-0 in 2**39 operations.

        * collisions in 58-round SHA-1 in 2**33 operations.
        ...

This is the same group that broke MD5 a few months ago and so this is
probably real.  It doesn't immediately turn everyone's applications
inseecure (2**69 operations is still more than the 2**64 operations
that it takes to break MD5 by brute force) and if it's like the MD5
result, finds only free rather than targeted collisions.  So don't panic.

Nonetheless I think Python should add SHA256/SHA384/SHA512 to the
stdlib for 2.4, and new applications should use them instead of SHA1
even though they're slower.  These are the new NIST hash algorithms
announced when AES was standardized.  Their design is a bit different
from SHA1 and probably more likely to resist this type of attack.


From caleb1 at telkomsa.net  Thu Feb 10 00:05:24 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Thu, 10 Feb 2005 00:05:24 -0500
Subject: Is Python as capable as Perl for sysadmin work?
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
	<mailman.2204.1107885796.22381.python-list@python.org>
	<4209b8a4$0$223$edfadb0f@dread12.news.tele.dk>
	<roy-F580D1.08565709022005@reader2.panix.com>
Message-ID: <opslytrasy1js0xs@news.telkomsa.net>

Roy

> How about the Yoda version:
>
> do:
>    statement
> do not do:
>    statement

The Yoda version actually goes

   statement
:do
   statement
:not do

Caleb


From drew at gremlinhosting.com  Thu Feb  3 09:10:28 2005
From: drew at gremlinhosting.com (Andrew James)
Date: Thu, 03 Feb 2005 14:10:28 +0000
Subject: Python-list Digest, Vol 17, Issue 54
In-Reply-To: <20050203134542.CC5741E4009@bag.python.org>
References: <20050203134542.CC5741E4009@bag.python.org>
Message-ID: <420230D4.1010603@gremlinhosting.com>

Diez/Steve,
Thanks for your responses. I did consider using the req object to store 
my request-life variables, but then I'm still stuck with having to pass
the req object to every class in my application (and have to import 
modpython into every script as well) if I want to get some information 
about the user. I've abstracted the communications to the client at a 
high level in my application and I don't really want to force knowledge 
of modpython any further down than I need to.

Your responses will give me the required lifetime for my variables, but 
not the required access at all levels of code (unless req is a global 
variable?).

Do you have any other suggestions as to how this might be implemented?

Many thanks,
Andrew

> 
> Hi all,
> I'm writing an application which runs within Apache and uses mod_python 
> to provide basic authentication and return content to the user, 
> something like:
> 
> import modpython
> ....
> def handler():
>   # main part of the application starts here
>   ...
> 
> def authenhandler():
>   ...
>   # Store information about the user in an object
>   u = new User(req.user, pass)
> 
> I'd like to be able to pass the u object somehow from authenhandler to 
> handler in an elegant fashion, but without using global variables (as I 
> understand it these persist for the life of the child process which will 
> be more than one request, which is not what I want, and could be a 
> security hole).
> 
> I suppose that I could use session variables, but since this part of my 
> application provides a WebDAV server, basic authentication credentials 
> are passed on each request (so I don't really want to have to look after 
> keeping track of sessions when I don't have to). I would rather not 
> modify all my existing classes to support an  extra parameter in their 
> constructors.
> 
> What I'm really looking for is some sort of global dictionary like PHP's 
> $REQUEST or $SESSION, which I can assign freely to during the life of 
> the request *from anywhere in my application* and which gets cleaned up 
> for me automatically afterwards. Does something like this exist in 
> mod_python?
> 
> If the approach above isn't possible, what would your recommendations be 
> for a solution to this issue?
> 
> Many thanks for your time,
> Andrew James
> 
> 
> ------------------------------------------------------------------------
> 
> Subject:
> Re: ModPython: passing variables between handlers?
> From:
> "Diez B. Roggisch" <deetsNOSPAM at web.de>
> Date:
> Thu, 03 Feb 2005 14:38:54 +0100
> To:
> python-list at python.org
> 
> To:
> python-list at python.org
> 
> Content-Transfer-Encoding:
> 7Bit
> Precedence:
> list
> MIME-Version:
> 1.0
> References:
> <mailman.1813.1107436865.22381.python-list at python.org>
> Message-ID:
> <36enlsF50l2q1U1 at individual.net>
> Content-Type:
> text/plain; charset=us-ascii
> Message:
> 8
> 
> 
>>import modpython
>>....
>>def handler():
>>   # main part of the application starts here
>>   ...
>>
>>def authenhandler():
>>   ...
>>   # Store information about the user in an object
>>   u = new User(req.user, pass)
> 
> 
> 
> <snip>
> 
>>What I'm really looking for is some sort of global dictionary like PHP's
>>$REQUEST or $SESSION, which I can assign freely to during the life of
>>the request *from anywhere in my application* and which gets cleaned up
>>for me automatically afterwards. Does something like this exist in
>>mod_python?
>>
>>If the approach above isn't possible, what would your recommendations be
>>for a solution to this issue?
> 
> 
> I have absolutely no experience with mod_python, so take this with a grain
> of salt - but you code above suggests that there is a request object: req.
> You already use it: req. How about storing u in req like this:
> 
> def authenhandler():
>    # Store information about the user in an object
>    req.u = new User(req.user, pass)
> 
> 
> 
> 
> 
> 
> ------------------------------------------------------------------------
> 
> Subject:
> Re: ModPython: passing variables between handlers?
> From:
> Steve Holden <steve at holdenweb.com>
> Date:
> Thu, 03 Feb 2005 08:31:24 -0500
> To:
> python-list at python.org
> 
> To:
> python-list at python.org
> 
> Content-Transfer-Encoding:
> 7bit
> Precedence:
> list
> MIME-Version:
> 1.0
> References:
> <mailman.1813.1107436865.22381.python-list at python.org>
> In-Reply-To:
> <mailman.1813.1107436865.22381.python-list at python.org>
> Message-ID:
> <WNpMd.102689$Jk5.71154 at lakeread01>
> Content-Type:
> text/plain; charset=us-ascii; format=flowed
> Message:
> 9
> 
> 
> Andrew James wrote:
> 
>> Hi all,
>> I'm writing an application which runs within Apache and uses 
>> mod_python to provide basic authentication and return content to the 
>> user, something like:
>>
>> import modpython
>> .....
>> def handler():
>>   # main part of the application starts here
>>   ...
>>
>> def authenhandler():
>>   ...
>>   # Store information about the user in an object
>>   u = new User(req.user, pass)
>>
>> I'd like to be able to pass the u object somehow from authenhandler to 
>> handler in an elegant fashion, but without using global variables (as 
>> I understand it these persist for the life of the child process which 
>> will be more than one request, which is not what I want, and could be 
>> a security hole).
>>
>> I suppose that I could use session variables, but since this part of 
>> my application provides a WebDAV server, basic authentication 
>> credentials are passed on each request (so I don't really want to have 
>> to look after keeping track of sessions when I don't have to). I would 
>> rather not modify all my existing classes to support an  extra 
>> parameter in their constructors.
>>
>> What I'm really looking for is some sort of global dictionary like 
>> PHP's $REQUEST or $SESSION, which I can assign freely to during the 
>> life of the request *from anywhere in my application* and which gets 
>> cleaned up for me automatically afterwards. Does something like this 
>> exist in mod_python?
>>
>> If the approach above isn't possible, what would your recommendations 
>> be for a solution to this issue?
>>
> RTFM ;-)
> 
> If you want these values to have the same lifetime as your requests then 
> it would appear to make sense to have them be request attributes, no?
> 
> Section 4.5.3 of the mod_python docs says little else about the request 
> object but """You can dynamically assign attributes to it as a way to 
> communicate between handlers.""".
> 
> regards
>  Steve
> 


From pobrien at orbtech.com  Mon Feb 14 14:21:54 2005
From: pobrien at orbtech.com (Pat)
Date: 14 Feb 2005 11:21:54 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr><cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr>
	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>
	<guLnmSj92OECFw0L@objmedia.demon.co.uk>
Message-ID: <1108408914.405899.129990@o13g2000cwo.googlegroups.com>

>>users.  I can't expect them to purchase a .NET compiler or go through
a

>See above.

That answers the cost question (assuming that your interpretation of
the licensing is correct, since I'm not a lawyer nor qualified to
render much of an opinion on that).  But there is still the issue of
going through a bunch of configuration hassle that scares me away from
expecting my users to make use of the MS tools.  Unless things have
gotten easier since Mike Fletcher wrote about the situation.

But thanks for the licensing info.  Much appreciated.  :-)

Patrick K. O'Brien
Orbtech    http://www.orbtech.com
Schevo     http://www.schevo.org
Pypersyst  http://www.pypersyst.org



From jjl at pobox.com  Thu Feb 10 18:42:13 2005
From: jjl at pobox.com (John J. Lee)
Date: 10 Feb 2005 23:42:13 +0000
Subject: lambda and for that matter goto not forgetting sugar
References: <tFJOd.38794$68.10179@fe1.news.blueyonder.co.uk>
	<mailman.2321.1108048902.22381.python-list@python.org>
Message-ID: <87is50j82y.fsf@pobox.com>

from goto.py ( http://entrian.com/goto/ ):
.        # Label: "label .x"  XXX Computed labels.


:-)


John


From dmitry_belous at ua.fm  Thu Feb 10 08:31:21 2005
From: dmitry_belous at ua.fm (Dmitry Belous)
Date: Thu, 10 Feb 2005 15:31:21 +0200
Subject: some question about tp_basicsize
Message-ID: <145288699.20050210153121@ua.fm>

Hi, All

I use C++ to create new types(inherited from PyTypeObject)
and objects(inherited from PyObject) and virtual
destructor to destroy objects. sizeof() is different
for different objects and therefore i don't know what i must do
with tp_basicsize.

Will the following source code work?
Must i set tp_basicsize to right size? (Can I use zero
for tp_basicsize?)

static void do_instance_dealloc(PyObject* obj) {
  if(obj->ob_type == &mytype_base)
    delete static_cast<myobject_base*>(obj);
}

PyTypeObject mytype_base = {
...
  0, /*tp_basicsize*/ /*i don't know size of object*/
...
  &do_instance_dealloc, /*tp_dealloc*/
...
};

class myobject_base : public PyObject {
public:
  myobject_base() : ob_type(mytype_base) {}
  virtual ~myobject_base() {}
};

class myobject_specific : public myobject_base {
public:
  std::string name;
  myobject_specific() : myobject_base() {}
};



From philippe at philippecmartin.com  Tue Feb  8 13:14:54 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Tue, 08 Feb 2005 18:14:54 GMT
Subject: broke tkinter
References: <mailman.2200.1107881733.22381.python-list@python.org>
	<z97Od.174038$w62.43711@bgtnsc05-news.ops.worldnet.att.net>
Message-ID: <pan.2005.02.08.18.14.52.836930@philippecmartin.com>

I'll check, thanks.

Philippe



On Tue, 08 Feb 2005 18:03:11 +0000, wes weston wrote:

> Philippe C. Martin wrote:
>> Hi,
>> 
>> I decided to clean my system and rebuild python from scratch.
>> 
>> I downloaded tk8.4.9, tcl8.4.9 and Python2-4.tar.bz2.
>> 
>> I installed tcl then tk using './configure --prefix=/usr'
>> 
>> tkcvs is now working OK
>> 
>> 
>> trying to compile python (configure = './configure --prefix=/usr', I get
>> this:
>> 
>> 
>> In file included
>> from /home/philippe/downloaded/Python-2.4/Modules/_tkinter.c:67:
>> /usr/include/tk.h:337: error: syntax error before "CONST84"
>> In file included from /usr/include/tk.h:1576,
>> 
>> from /home/philippe/downloaded/Python-2.4/Modules/_tkinter.c:67:
>> 
>> Any clue!
>> 
>> Regards,
>> 
>> Philippe
>> 
>> 
> Phillipp,
>     Might you be getting the wrong header file/tk version?
> 
> http://wiki.tcl.tk/3669  talks about it.
> 
> wes



From jcribbs at twmi.rr.com  Sun Feb 20 17:06:01 2005
From: jcribbs at twmi.rr.com (Jamey Cribbs)
Date: Sun, 20 Feb 2005 17:06:01 -0500
Subject: ANNOUNCE: KirbyBase 1.8
Message-ID: <421909C9.4030605@twmi.rr.com>

KirbyBase is a simple, plain-text, database management system written in 
Python.  It can be used either embedded in a python script or in a 
client/server, multi-user mode.  You use python code to express your 
queries instead of having to use another language such as SQL.  
KirbyBase is disk-based, not memory-based.  Database changes are 
immediately written to disk.

You can find more information on KirbyBase at:
http://www.netpromi.com/kirbybase.html

You can download KirbyBase for Python at:
http://www.netpromi.com/files/KirbyBase_Python_1.8.zip

The most noticeable things about this release are (1) the ability to 
sort the result set by multiple fields, (2) the ability to have the 
result set returned as a nicely formatted report, suitable for printing, 
and (3) the ability to do an insert or an update using a record object 
(thanks, Fred Pacquier, for the suggestion).

The manual has also been updated to reflect the new features.

Also, for those of you who have asked how Kirby is doing, I have a 
couple of new pictures of him on the website.  :-)

I would like to thank everyone who has emailed me with comments, bug 
reports, and enhancement requests/ideas.  Hearing from people who 
actually use KirbyBase is what makes working on it worthwhile.  Please 
keep the emails coming!


Changes in Version 1.8:

         ********   IMPORTANT - Method Interface Changes   ****************
        -Added the ability to sort the result set of a select by multiple
         fields and to specify whether each field should be sorted
         ascending or descending.  This necessitated a change to the
         interface of the select method.  I moved the position of sortField
         in the argument list and also changed it to be a list instead of a
         string.  I also changed the name of sortField to sortFields. I
         also moved sortDesc in the arguement list and also made it a list.
         ******************************************************************
        -Added another allowable value, 'report',  to the keyword
         parameter, returnType in the select method.  This returns the
         result set in a pretty print format.  Along with this, added
         another keyword parameter called rptSettings to the select method.
         This is only used if rptType is 'report'.  It is a 2 element list.
         The first element specifies the number of records to print on a
         page.  The second element is boolean specifying whether to print
         a dashed line between records.
        -Added ability to pass field values to update and insert using an
         object with attributes set equal to the field names.
        -Fixed a bug in _getMatches.  If a field of type int or float had
         a blank value in the table (i.e. ''), the code was attempting to
         convert it to it's proper type (i.e. int or float) before
         doing the match comparison.  This would cause an exception to
         occur.  Now, if the field is an int,float,date or datetime and it
         is blank, I convert it to None.  This allows the numeric
         comparisons to work correctly for null fields.
        -Fixed a bug in select.  If a field in the result set was equal
         to '', I was letting it stay that way, when I should really be
         converting it to None before returning the result set.
        -Cleaned up the internals a bit.  Mainly, I tried to use functions
         in the operator module like lt and ge instead of hardcoding < and
         >= in an if statement.


Jamey Cribbs
jcribbs at twmi.rr.com




From ggrp1.20.martineau at dfgh.net  Mon Feb 21 03:33:23 2005
From: ggrp1.20.martineau at dfgh.net (Martin Miller)
Date: 21 Feb 2005 00:33:23 -0800
Subject: Test for structure
References: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
	<mailman.2824.1108792560.22381.python-list@python.org>
	<1108937287.079367.276910@g14g2000cwa.googlegroups.com>
	<HIqdnYQVyeBCjYTfRVn-oQ@comcast.com>
Message-ID: <1108974803.420441.18850@z14g2000cwz.googlegroups.com>

Yes, both string and lists have a __getitem__ attribute:

>>> c1 = 'abc'
>>> c2 = ['de', 'fgh', 'ijkl']
>>> hasattr(c1, '__getitem__')
True
>>> hasattr(c2, '__getitem__')
True

In other words you could index elements of either one using [].

Likewise, both a string and list would produce a usable iterator using
the following logic:

try:
    itr = iter(a)
except TypeError:
    # 'a' is not iterable
else:
    # 'a' is iterable

In either case, you can't tell a string and list apart, which is what
the OP wanted to know, namely how to differentiate the two. EAPF is
fine, but what operation would answer the string vs list question?

Perhaps the test for an __iter__ attribute *is* the way to go because
you can tell the difference between the two type. Again I don't know
because the OP doesn't give enough information. I suspect, but don't
know, that it could be so that either one string or a list of strings
as an argument could treated as a list of 0 or more strings and
accessed by indices by most of the rest of the code.

I think the technique suggested by Robin Munn nearly a year ago (and
referenced by the link in Simon Brunning's post):
http://groups-beta.google.com/group/comp.lang.python/msg/c8befd4bed517bbc
namely:

try:
    a + ''
except TypeError:
    pass
else:
    a= [a]

would be a good usable solution, although it's not totally infallible.
It may not be possible to give a better answer without more real
information about the desired usage.

Martin


=====================
Steven Bethard wrote:
> Terry Hancock wrote:
>  > But you probably shouldn't do that. You should probably just test
to
>  > see if the object is iterable --- does it have an __iter__ method?
>  >
>  > Which might look like this:
>  >
>  > if hasattr(a, '__iter__'):
>  >     print "'a' quacks like a duck"
>
> Martin Miller top-posted:
> > I don't believe you can use the test for a __iter__ attribute in
this
> > case, for the following reason:
> >
> >>>>c1 = 'abc'
> >>>>c2 = ['de', 'fgh', 'ijkl']
> >>>>hasattr(c1, '__iter__')
> > False
> >
> >>>>hasattr(c2, '__iter__')
> > True
>
> Right.  str and unicode objects support iteration through the old
> __getitem__ protocol, not the __iter__ protocol.  If you want to use
> something as an iterable, just use it and catch the exception:
>
> try:
>      itr = iter(a)
> except TypeError:
>      # 'a' is not iterable
> else:
>      # 'a' is iterable
>
> Another lesson in why EAPF is often better than LBYL in Python[1].
> 
> STeVe
> 
> [1] http://www.python.org/moin/PythonGlossary



From deetsNOSPAM at web.de  Wed Feb 16 09:59:57 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 16 Feb 2005 15:59:57 +0100
Subject: Getting milliseconds in Python
References: <1108565135.167562.196830@z14g2000cwz.googlegroups.com>
Message-ID: <37h5epF5ck38lU2@individual.net>

mjs7231 wrote:

> I am trying to record how long an operation takes, but can't seem to
> find a function that will allow me to record the timestamp in
> milliseconds, maybe I am looking in the wrong place?

I have no idea where you look - but the time-module has IMHO a descriptive
enough name - so look there and be a happy camper.

-- 
Regards,

Diez B. Roggisch


From cjbottaro at alumni.cs.utexas.edu  Fri Feb  4 13:59:01 2005
From: cjbottaro at alumni.cs.utexas.edu (Christopher J. Bottaro)
Date: Fri, 04 Feb 2005 12:59:01 -0600
Subject: empty classes as c structs?
Message-ID: <cu0gk5$4q5$1@sea.gmane.org>

I find myself doing the following very often:

class Struct:
        pass
...
blah = Struct()
blah.some_field = x
blah.other_field = y
...

Is there a better way to do this?  Is this considered bad programming
practice?  I don't like using tuples (or lists) because I'd rather use
symbolic names, rather than numeric subscripts.  Also, I don't like having
to declare the empty Struct class everytime I want to do this (which is
very often).

Feedback is appreciated, thanks.



From peter at engcorp.com  Wed Feb 16 20:38:13 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 16 Feb 2005 20:38:13 -0500
Subject: Font size
In-Reply-To: <4213e033$1@news.comindico.com.au>
References: <42126822@news.comindico.com.au>
	<ldzqyx6byqdw$.wt8smryc0t3.dlg@40tude.net>
	<42129ea1@news.comindico.com.au> <4213e033$1@news.comindico.com.au>
Message-ID: <jOCdnYzu558kaI7fRVn-3w@powergate.ca>

Adam wrote:
> We are running a numbers game at our retirement village and using a roulette 
> wheel to generate the numbers. but this wheel is only about 12 in diameter 
> and is little more than a toy. So we came up with the idea of using a random 
> number generator to generate numbers from 0 to 36 and display them in large 
> figures on my laptop. This is for the benefit of those people who are hard 
> of hearing. They like to see what is happening.
> I was an RPG programmer before retirement but am new to Python. So I used 
> the following code to generate the numbers but I don't know how to display 
> them in large figures (about 3 ins high) or get rid of the idle text.
> 
> from random import randint
> rand = randint(0,36)
> print rand
> 
> my os = XP

I'd suggest this as the possible best-bang-for-the-buck solution,
at least in terms of quick success.  If it's not good enough, at
least you've got now a baseline to compare against.

In XP, under the Start menu, under All Programs then Accessibility
you should find a "Magnifier" tool.  Run this, right-click and change
the options to a magnification level of 9, then drag the window
somewhere convenient and make it a decent size.

Then run your Python script, and move the mouse near where the
output shows up.

The result is a "coarse" magnification of the font, as in individual
pixels will show up as large squares, but from any kind of distance
it's likely to look good enough to be usable...

And you don't need to learn a GUI framework to use it. :-)

-Peter


From troyf at pobox.com  Thu Feb  3 17:06:48 2005
From: troyf at pobox.com (troyf at pobox.com)
Date: 3 Feb 2005 14:06:48 -0800
Subject: Extreme Python
Message-ID: <1107468408.186079.275670@c13g2000cwb.googlegroups.com>

Hello all,

I've created a web/email group for topics related to both Extreme
Programming (or other Agile methodologies) and Python. If you're
interested, please visit
http://groups-beta.google.com/group/extreme-python/ and subscribe. Or
just post directly to extreme-python at googlegroups.com. Hope to see you
there!

Troy Frever
Extreme Programmer and Coach
Aviarc Corporation



From rkern at ucsd.edu  Mon Feb 14 18:47:40 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 14 Feb 2005 15:47:40 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <curb0t$67k$2@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108370491.792820.142200@z14g2000cwz.googlegroups.com>
	<cuprg2$6rt$1@usenet.otenet.gr> <37bcdkF5bg7knU1@individual.net>
	<cupumi$kfs$1@usenet.otenet.gr> <37bel6F59jvkgU1@individual.net>
	<cuq4d6$fqp$1@usenet.otenet.gr>
	<Xns95FD7EAD8A162duncanrcpcouk@127.0.0.1>
	<curb0t$67k$2@usenet.otenet.gr>
Message-ID: <curdar$opf$1@news1.ucsd.edu>

Ilias Lazaridis wrote:
> Duncan Booth wrote:
> 
>> Ilias Lazaridis wrote:
>>
>>>> There is a OS-tool-chain supported on windows, cygwin. 
>>>
>>>
>>> this depends on cygwin.dll, which is GPL licensed
>>>
>>> [or am I wrong?]
>>
>>
>> It is GPL licensed with an amendment which prevents the GPL spreading 
>> to other open source software with which it is linked.
>>
>> "In accordance with section 10 of the GPL, Red Hat, Inc. permits 
>> programs whose sources are distributed under a license that complies 
>> with the Open Source definition to be linked with libcygwin.a without 
>> libcygwin.a itself causing the resulting program to be covered by the 
>> GNU GPL."
> 
> 
> If I understand this right, I cannot produce commercial software with 
> the cygwin toolset.

Wait, you demand a completely open source toolchain on a proprietary 
operating system to develop proprietary software?

The mind *boggles*.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From mefjr75 at hotmail.com  Wed Feb  2 19:01:13 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 2 Feb 2005 16:01:13 -0800
Subject: global variables
In-Reply-To: <1107385488.822768.317250@l41g2000cwc.googlegroups.com>
References: <1107385488.822768.317250@l41g2000cwc.googlegroups.com>
Message-ID: <1107388493.465599.140480@g14g2000cwa.googlegroups.com>

alex wrote:
> Hi,
>
> is it possible to create 'global' variables that can be seen in all
> other classes?
>
> Alex
Hello,
What about using a class?

Py> class globalVar:
...    pass

Py> globals = globalVar()

Now you can assign 'variables' to it.
And use it anywhere you need it.

Py> globals.image_height = (255,777)
Py> globals.image_mode = 'RGB'
Py> globals.image_names = ['this.jpg', that.jpg']
etc...
hth, 
M.E.Farmer



From mwm at mired.org  Sat Feb 12 22:47:46 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 12 Feb 2005 21:47:46 -0600
Subject: SCons build tool speed
References: <SBsPd.4406$ZZ.3056@newssvr23.news.prodigy.net>
	<gOOdnTpZnaZCVJPfRVn-3w@powergate.ca>
Message-ID: <864qgh6rz1.fsf@guru.mired.org>

Peter Hansen <peter at engcorp.com> writes:

> ted wrote:
>> How does the speed of the Scons build tool compare with Ant? Right
>> now with out Ant builds take around an hour. Hoping to speed that up.
>
> Don't tools like Scons, Ant, and for that matter "make" just
> execute other programs?  So that 99% of the time is consumed
> external to the Scons, Ant, or make process itself?  Why
> do you think the speed of the build tool is of any significance
> compared to the time for things like compilers and linkers
> to execute?

Actually, these tools do a number of things oter than run other
programs. For instance, they parse input files to construct a build
tree, walk the build tree figuring out what needs to be rebuilt, and
only *then* do they get around to executing those other
programs. Assuming that the work prior to running those other programs
is "neglible" can lead to some truly atrocious build-time behavior. In
fact, one major advantage that ant/scons/jam/etc. have over Make is
that they avoid the defacto standard "recursive make" build
system. See <URL:
http://www.pcug.org.au/~millerp/rmch/recu-make-cons-harm.html > for
details on that.

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From fredrik at pythonware.com  Wed Feb  2 13:06:48 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 2 Feb 2005 19:06:48 +0100
Subject: Reference count question
References: <003401c5090b$2f0f4fb0$90010d0a@umanis.com>
Message-ID: <ctr4qa$2hh$1@sea.gmane.org>

"cedric paille" wrote:

> I'm making python's modules to extend my application's functions with a built in script editor.
> At now all works very well, but i'd like to know if i'm not forgetting some references inc/dec....
>
> Here is a portion of my code:
>
> static PyObject *
> Scene_GetNodeGraph(PyObject *self, PyObject *args)
> {
>  NodeGraph* Ng = NodeGraph::GetInstance();
>  std::vector<String> NodG;
>  Ng->GetNodeGraph(NodG);
>  PyObject* List = PyList_New(NodG.size());

after this operation, this function "owns" the object.

you should check for a NULL value, though.  PyList_New may
fail.  adding "if (!List) return NULL;" should do the trick.

>  PyObject* Str = NULL;
>  std::vector<String>::iterator it = NodG.begin();
>  int i = 0;
>  for (;it != NodG.end();it++)
>  {
>    Str = PyString_FromString(it->AsChar());

after this operation, the function "owns" the string.

you should check for a NULL value, though.  PyString_FromString
may fail (don't forget to release the list).

>    PyList_SetItem(List,i,Str);

after this operation, the list "owns" the string.

you should check the return value, though.  PyList_SetItem may (in
theory) fail.

     i++;
  }
  return List;

this hands List ownership over to the caller.

}

> Can someone take a look at this and tell me if i must add some inc/decref ?

the reference handling looks correct, but you might wish to add some error
handling to avoid crashes under low-memory conditions.

</F> 





From bpeng at rice.edu  Sat Feb  5 16:16:34 2005
From: bpeng at rice.edu (Bo Peng)
Date: Sat, 05 Feb 2005 15:16:34 -0600
Subject: changing local namespace of a function
In-Reply-To: <cu1l9o$3oq$1@joe.rice.edu>
References: <cu0lru$8ik$1@joe.rice.edu>
	<cu0sj5$sfk$1@sea.gmane.org>	<4204400C.5060608@iinet.net.au>
	<mailman.1948.1107575575.22381.python-list@python.org>
	<cu1l9o$3oq$1@joe.rice.edu>
Message-ID: <cu3d3j$h09$1@joe.rice.edu>

> Exec is slow since compiling the string and calls to globals() use a lot 
> of time.  The last one is most elegant but __getattr__ and __setattr__ 
> are costly. The 'evil hack' solution is good since accessing x and y 
> takes no additional time.

Previous comparison was not completely fair since I could pre-compile 
fun2 and I used indirect __setattr__. Here is the new one:


 >>> import profile
 >>> a = {'x':1, 'y':2}
 >>> N = 100000
 >>> # solution one: use dictionary directly
... def fun1(d):
...   for i in xrange(0,N):
...     d['z'] = d['x'] + d['y']
...
 >>> # solution two: use exec
... def makeFunction(funcStr, name):
...   code = compile(funcStr, name, 'exec')
...   def f(d):
...     exec code in d
...   return f
...
 >>> def fun2(d):
...   myfun = makeFunction('z = x + y', 'myfun')
...   for i in xrange(0,N):
...     myfun(d)
...   del d['__builtins__']
...
... # solution three: update local dictionary
 >>> # Note that locals() is NOT d after update() so
... #   z = x + y
... # does not set z in d
... def fun3(d):
...   exec "locals().update(d)"
...   for i in xrange(0,N):
...     d['z'] = x + y
...
 >>> # solution four: use dict wrapper
... # this makes code easier to write and read
... class wrapdict(object):
...   """Lazy attribute access to dictionary keys.  Will not access
...      keys that are not valid attribute names!"""
...   def __init__(self, mydict):
...     self.__dict__ = mydict
...
... # use wrapper
 >>> def fun4(d):
...   wd = wrapdict(d)
...   for i in xrange(0,N):
...     wd.z = wd.x + wd.y
...
 >>> profile.run('fun1(a)')
          3 function calls in 0.060 CPU seconds

    Ordered by: standard name

    ncalls  tottime  percall  cumtime  percall filename:lineno(function)
         1    0.000    0.000    0.060    0.060 <string>:1(?)
         1    0.000    0.000    0.060    0.060 profile:0(fun1(a))
         0    0.000             0.000          profile:0(profiler)
         1    0.060    0.060    0.060    0.060 python-10176FWs.py:2(fun1)


 >>> profile.run('fun2(a)')
          200004 function calls in 2.130 CPU seconds

    Ordered by: standard name

    ncalls  tottime  percall  cumtime  percall filename:lineno(function)
         1    0.000    0.000    2.130    2.130 <string>:1(?)
    100000    0.520    0.000    0.520    0.000 myfun:1(?)
         1    0.000    0.000    2.130    2.130 profile:0(fun2(a))
         0    0.000             0.000          profile:0(profiler)
         1    0.590    0.590    2.130    2.130 python-10176EqB.py:1(fun2)
         1    0.000    0.000    0.000    0.000 
python-10176Sgy.py:2(makeFunction)
    100000    1.020    0.000    1.540    0.000 python-10176Sgy.py:4(f)


 >>> profile.run('fun3(a)')
          4 function calls (3 primitive calls) in 0.070 CPU seconds

    Ordered by: standard name

    ncalls  tottime  percall  cumtime  percall filename:lineno(function)
       2/1    0.000    0.000    0.070    0.070 <string>:1(?)
         1    0.000    0.000    0.070    0.070 profile:0(fun3(a))
         0    0.000             0.000          profile:0(profiler)
         1    0.070    0.070    0.070    0.070 python-10176R0H.py:4(fun3)


 >>> profile.run('fun4(a)')
          4 function calls in 0.100 CPU seconds

    Ordered by: standard name

    ncalls  tottime  percall  cumtime  percall filename:lineno(function)
         1    0.000    0.000    0.100    0.100 <string>:1(?)
         1    0.000    0.000    0.100    0.100 profile:0(fun4(a))
         0    0.000             0.000          profile:0(profiler)
         1    0.000    0.000    0.000    0.000 
python-10176e-N.py:6(__init__)
         1    0.100    0.100    0.100    0.100 python-10176rIU.py:1(fun4)


Since

   d['x'] is fast but cumbersome
   exec "z=x+y' is still slow.
   exec "locals().update(d)" is evil
   d.x is elegant and only a little slower than d['x']

I am announcing the winner of the contest: dictwrap! (applause)

Bo



From steve at myplace.com  Mon Feb 21 15:57:27 2005
From: steve at myplace.com (Steve M)
Date: Mon, 21 Feb 2005 14:57:27 -0600
Subject: Tuple index
References: <cvbcc6$b5f$1@news.netins.net>
	<1108951559.490554.305310@l41g2000cwc.googlegroups.com>
Message-ID: <cvdian$ejs$1@news.netins.net>

John Machin wrote:

> 
> Steve M wrote:
>> Hello,
>>
>>         I'm trying to figure out the index position of a tuple
> member.
>> I know the member name, but I need to know the members index
> position.
> 
> Tuples, like lists, don't have members in the sense that they can be
> "named" like t.foo. The only way of referring to them is by index,
> t[4].
> 
>> I
>> know that if I use the statement print tuple[4] that it will print
> the
>> contents of that location. What I don't understand is if I know that
> foo is
>> a member of tuple, how do I get foo's index position.
> 
> You *can't* "know that foo is a member of tuple".
> 
> Consider this:
> 
>>>> foo = 'carol'
>>>> t = (123,456,789,'bob',foo,'ted')
>>>> t[4]
> 'carol'
> 
> Is that what you mean by "foo is a member of t'? Well, it's not. foo is
> a reference to the string 'carol'. t[4] is also a reference to the
> string 'carol'.
> 
> Now read on ...
> 
>>>> foo = 'alice'
>>>> t
> (123, 456, 789, 'bob', 'carol', 'ted')
>>>> t[4]
> 'carol'
>>>>
> 
> Now foo is a reference to the string 'alice'. Nothing to do with t,
> either before or now.
> 
> Have you read the tutorial found at http://docs.python.org/tut/tut.html
> ?

I guess I explained my problem incorrectly. Let me try again.

tuple = ("fred", "barney", "foo")

I know that foo is an element of tuple, but what I need to know is what
the index of foo is, tuple[?]. Hopefully this explains what I'm trying 
do do better. Sorry about the earlier confusion.

Steve


From peter at engcorp.com  Fri Feb 11 22:00:58 2005
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 11 Feb 2005 22:00:58 -0500
Subject: dos box appears when clicking .pyc
In-Reply-To: <4ZGdne8O2fch3ZDfRVn-oQ@comcast.com>
References: <mailman.2426.1108164378.22381.python-list@python.org>
	<4ZGdne8O2fch3ZDfRVn-oQ@comcast.com>
Message-ID: <7tOdnYo6Ntp47JDfRVn-vQ@powergate.ca>

Larry Bates wrote:
> Change the association for .pyc files to pythonw.exe
> from python.exe.

This might help further (taken from a properly configured
machine):

c:\>assoc .pyc
.pyc=Python.CompiledFile

c:\>ftype Python.CompiledFile
Python.CompiledFile="C:\a\python24\python.exe" "%1" %*

c:\>assoc .pyw
.pyw=Python.NoConFile

c:\>ftype Python.NoConFile
Python.NoConFile="C:\a\python24\pythonw.exe" "%1" %*


Note "pythonw" for ".pyw" files, and just "python" for
".pyc" files.  If you want .pyc files NOT to open up
the DOS box, you need to change the association to
what the .pyw files use, which is not the default and
possibly will not always do what you want.

-Peter


From ilias at lazaridis.com  Mon Feb 14 18:09:51 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 01:09:51 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cuo71l$gig$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
Message-ID: <curb3t$67k$3@usenet.otenet.gr>

[Sorry, I'm to tired to read more posts today. I'll try to answer to 
each message adressed to me tomorrow. Thank you for your time.]

-

I find this thread facinating.

I don't know wich of the posters in this thread belong to the python team.

Nearly no one community member gives simply some answers to this very 
simple questions.

Please summarize all the efforts the community has taken to write within 
this thread.

This sum of efforts should be enouth to setup a basic official MinGW 
compilation.

I have the strange feeling, that some people within the community and 
the team are not intrested in this.

-

copied from another answer:

"The Python Foundation could create an official sub-project to create an 
automated build target based on the MinGW toolchain. I am sure that many 
community members would be more than happy to contribute."

-

Let's see:

The process would be:

a) A Python Foundation official states: "of course we accept diversity 
and of course we are intrested that our source-code-base compiles 
directly with MinGW (and other compilers)".

b) the pyMinGW developer states: "I am intrested that my patches are 
included within the main python source code base" [of course this 
contribution would deserve to be mentioned somewhere]

c) One part of the Python Community states: "look those loosers, like to 
use MinGW toolkit - pah! I'll continue to use my super-optimizing, xx% 
faster results, less hassle Microsoft-Compiler"

d) One part of the Python Community states: "I'm very happy that my 
toolset of choice gets official support, to which I can contribute as a 
community member"

e) there is no point e. People start simply to cooperate, thus python's 
evolution is ensured.

-

I try to sleep after this communicational desaster here.

Good night to all.

.

-- 
http://lazaridis.com


From smile-s at alloymail.com  Tue Feb 15 13:16:53 2005
From: smile-s at alloymail.com (samar bazied)
Date: Tue, 15 Feb 2005 13:16:53 -0500
Subject: some qustions on python
Message-ID: <20050215181653.0D39ACDF8F@ws3-2.us4.outblaze.com>

Hi..
plz
can u help me??
I am very new in python and I have some qustions about it.
can u give me design process of python and their related langauges?
and I will be very habby if u give me small evaluation of python>>
plz..
plz...
plz....
help me..
------------
-- 
_______________________________________________
Sign-up for your own FREE Personalized E-mail at Mail.com
http://www.mail.com/?sr=signup


1 cent a minute calls anywhere in the U.S.!

http://www.getpennytalk.com/cgi-bin/adforward.cgi?p_key=RG9853KJ&url=http://www.getpennytalk.com




From qwweeeit at yahoo.it  Sat Feb 26 09:38:04 2005
From: qwweeeit at yahoo.it (qwweeeit)
Date: 26 Feb 2005 06:38:04 -0800
Subject: remove strings from source
Message-ID: <2ab23d7a.0502260638.311cc5e9@posting.google.com>

For a python code I am writing I need to remove all strings
definitions from source and substitute them with a place-holder.

To make clearer:
line 45  sVar="this is the string assigned to sVar"
must be converted in:
line 45 sVar=s00001

Such substitution is recorded in a file under:
s0001[line 45]="this is the string assigned to sVar"

For curious guys:
I am trying to implement a cross variable reference tool and the
variability (in lenght) of the string definitions (expecially if
multi-line) can cause display problems.

I need your help in correctly identifying the strings (also embedding
the r'xx..' or u'yy...' as part of the string definition). The problem
is mainly on the multi-line definitions or in cached strings
(embedding chr() definitions or escape sequences).


From just at xs4all.nl  Thu Feb  3 06:57:18 2005
From: just at xs4all.nl (Just)
Date: Thu, 03 Feb 2005 12:57:18 +0100
Subject: Generating .pyc/.pyo from a make file
References: <4308d2-0801.ln1@eskimo.tundraware.com>
	<42015a85_1@news.arcor-ip.de>
	<dh38d2-at71.ln1@eskimo.tundraware.com>
	<4201607f_2@news.arcor-ip.de> <RldMd.102645$Jk5.24461@lakeread01>
	<2h48d2-8481.ln1@eskimo.tundraware.com>
	<ctscc1$isf$1@news1.tilbu1.nb.home.nl>
Message-ID: <just-30D2DA.12571803022005@news1.news.xs4all.nl>

In article <ctscc1$isf$1 at news1.tilbu1.nb.home.nl>,
 vincent wehren <vincent at visualtrans.de> wrote:

> Tim Daneliuk wrote:
> > Steve Holden wrote:
> > 
> >> Roland Heiber wrote:
> >>
> >>> Tim Daneliuk wrote:
> >>>
> > Aha!  Exactly ... and that makes perfect sense too.  D'oh!  I guess a 
> > better
> > distribution strategy would be to have the installation program generate 
> > the pyo
> > file at installation time...
> > 
> > Thanks -
> 
> Also, the *.py? files contain the full pathname of the *.py they have 
> been compiled from.

True.

> Copying them to other path locations will give you 
> the wrong __file___ information in tracebacks.

This is not 100% accurate: yes, the traceback shows the original source 
file path, yet module.__file__ does point to the actual .pyc file it was 
loaded from.

Just


From john at grulic.org.ar  Fri Feb 18 11:35:28 2005
From: john at grulic.org.ar (John Lenton)
Date: Fri, 18 Feb 2005 13:35:28 -0300
Subject: low-end persistence strategies?
In-Reply-To: <1108742241.070703.197260@z14g2000cwz.googlegroups.com>
References: <mailman.2735.1108616299.22381.python-list@python.org>
	<1108622622.119311.43200@f14g2000cwb.googlegroups.com>
	<mailman.2746.1108629315.22381.python-list@python.org>
	<1108629775.800508.3400@f14g2000cwb.googlegroups.com>
	<mailman.2777.1108674138.22381.python-list@python.org>
	<1108702957.327528.22010@z14g2000cwz.googlegroups.com>
	<mailman.2790.1108704152.22381.python-list@python.org>
	<1108707658.105102.298300@z14g2000cwz.googlegroups.com>
	<mailman.2798.1108737792.22381.python-list@python.org>
	<1108742241.070703.197260@z14g2000cwz.googlegroups.com>
Message-ID: <20050218163528.GF17991@grulic.org.ar>

On Fri, Feb 18, 2005 at 07:57:21AM -0800, Michele Simionato wrote:
> Uhm ... I reading /usr/src/linux-2.4.27/Documentation/mandatory.txt
> The last section says:
> 
> """
> 6. Warning!
> -----------
> 
> Not even root can override a mandatory lock, so runaway processes
> can wreak havoc if they lock crucial files. The way around it is to
> change the file permissions (remove the setgid bit) before trying to
> read or write to it.  Of course, that might be a bit tricky if the
> system is hung :-(
> """
> 
> so lockf locks do not look completely harmless ...

if you read the whole file, you will have read that turning on
mandatory locks is not trivial. I never said it was harmless, and in
fact (as that section explains) it's a bad idea for most cases; there
are some (very few) situations where you need it, however, and so you
can get at that functionality. Having to mount your filesystem with
special options and twiddling the permission bits is a pretty strong
hint that the implementors didn't think it was a good idea for most
cases, too.

Hmm, just read that file, and it doesn't mention the "have to mount
with special options" bit. But if you look in mount(8), you see an
entry under the options list,

   mand   Allow mandatory locks on this filesystem. See fcntl(2)

and if you look in fcntl(2), you see that

   Mandatory locking
       (Non?POSIX.)  The above record locks may be either advi?
       sory or mandatory, and are advisory by default.  To make
       use  of  mandatory  locks,  mandatory  locking  must  be
       enabled (using the "?o mand" option to mount(8)) for the
       file system containing the file to be locked and enabled
       on the file itself (by disabling group  execute  permis?
       sion  on  the  file  and enabling the set?GID permission
       bit).

       Advisory locks are not  enforced  and  are  useful  only
       between   cooperating  processes.  Mandatory  locks  are
       enforced for all processes.

if I have come across as recommending mandatory locks in this thread,
I apologize, as it was never my intention. It is a cool feature for
the .001% of the time when you need it (and the case in discussion in
this thread is not one of those), but other than that it's a very,
very bad idea. In the same league of badness as SysV IPC; I'd still
mention SysV IPC to someone who asked about IPC on Linux, however,
because there are places where it is useful even though most times
it's a stupid way to do things (yes, Oracle, *especially* you).

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
A pencil with no point needs no eraser.
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From danperl at rogers.com  Fri Feb  4 00:08:58 2005
From: danperl at rogers.com (Dan Perl)
Date: Fri, 4 Feb 2005 00:08:58 -0500
Subject: advice needed for simple python web app
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
	<7xr7jxnddh.fsf@ruckus.brouhaha.com>
Message-ID: <OqCdnWO5h9_ynp7fRVn-uA@rogers.com>


"Paul Rubin" <http://phr.cx at NOSPAM.invalid> wrote in message 
news:7xr7jxnddh.fsf at ruckus.brouhaha.com...
> "Dan Perl" <danperl at rogers.com> writes:
>> Basically, what I'm looking for is a web server that accepts an HTTP
>> request and invokes a python script.  But I would like a "pythonic"
>> solution so a web server like Apache is a solution that I would like
>> to avoid.  The server should also be as simple as possible to
>> administrate.
>
> CGI and CGIHTTPServer (or whatever it's called) is conceptually the
>> simplest.  What does your app do?

The application is just something I'm playing with to learn a little bit on 
web apps.  It uses an HTML form to send an email.  The form takes inputs 
like the From:, To: and Subject: fields and a text field.

I found the "Internet Protocols and Support" chapter in the Library 
Reference that covers also the CGIHTTPServer.  It's definitely something I 
will have to read.  Thanks.

Dan 




From kdahlhaus at yahoo.com  Wed Feb 16 12:30:04 2005
From: kdahlhaus at yahoo.com (kdahlhaus at yahoo.com)
Date: 16 Feb 2005 09:30:04 -0800
Subject: Python  to be used for Mod Language in Battlefield 1942 Sequel
Message-ID: <1108575004.191726.249560@g14g2000cwa.googlegroups.com>

I love the orignal so much, now to hear that mod's will be created in
Python, well it brings tears of joy.....


Python Used as Modding Language for Battlefield 2
Programming
First Person Shooters (Games)
Posted by Zonk on Friday February 11, @11:27AM
from the snakes-and-guns dept.
Dutch Dopey writes "In an interview with Lars Gustavsson of DICE, it
was mentioned that Battlefield 2's modding tools are going to be
delivered with the game, and that the tools are the same ones used to
develop the game. The modding language in use is Python, and will
support all aspects of the language

http://developers.slashdot.org/developers/05/02/11/1439230.shtml?tid=156&tid=204



From tjreedy at udel.edu  Mon Feb 21 15:25:22 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 21 Feb 2005 15:25:22 -0500
Subject: Test for structure
References: <1108566497.848623.45360@c13g2000cwb.googlegroups.com><mailman.2824.1108792560.22381.python-list@python.org><1108937287.079367.276910@g14g2000cwa.googlegroups.com><HIqdnYQVyeBCjYTfRVn-oQ@comcast.com><1108974803.420441.18850@z14g2000cwz.googlegroups.com>
	<GvKdnbutV6lQt4ffRVn-jA@comcast.com>
Message-ID: <cvdft3$e7c$1@sea.gmane.org>


"Steven Bethard" <steven.bethard at gmail.com> wrote in message 
news:GvKdnbutV6lQt4ffRVn-jA at comcast.com...
> I don't like this idea much because it depends on str and unicode _not_ 
> having a particular function.  I haven't seen any guarantee anywhere that 
> str or unicode won't ever grow an __iter__ method.  So this code seems 
> dangerous as far as future compatibility goes.

When CPython's support for the old iteration protocol goes away, which I 
expects it will someday, strings will have to grow an __iter__ method. 
Even now, I think this difference between strings and lists is more of an 
accident than a logical design.  So the test is opaque and specific to 
current CPython.  The validity of something like a = a+'', however, is 
inherent to the nature of strings.

Terry J. Reedy





From martin at v.loewis.de  Mon Feb 21 17:57:28 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 21 Feb 2005 23:57:28 +0100
Subject: IDLE Problem: win98\Python2.4
In-Reply-To: <f4pSd.2168$MY6.396@newsread1.news.pas.earthlink.net>
References: <22eSd.1969$MY6.1483@newsread1.news.pas.earthlink.net>
	<1109004976.267201.200950@z14g2000cwz.googlegroups.com>
	<f4pSd.2168$MY6.396@newsread1.news.pas.earthlink.net>
Message-ID: <421A6758.8050401@v.loewis.de>

kim kubik wrote:
> A little knowledge is indeed a dangerous thing; forgive my
> stupidity - it will happen again, so I'm apologizing in advance!

No need to apologize! This is a frequent mistake, and it might
be sensible to change Python to be more resistent against it.
For example, it might be possible to check whether TCL_LIBRARY
points to a "good" Tcl version if set, in lib-tk/FixTk.py.
Then, if it is somehow determined to be incorrect (i.e. by
containing an outdated tcldll, but no current one), TCL_LIBRARY
could be ignored, and the included library could be used.

Alternatively, a more detailed warning if import _tkinter
failed and TCL_LIBRARY is set could be produced (instead
of silently "fixing" the problem for the user).

Patches in this direction are welcome.

Regards,
Martin


From snail at objmedia.demon.co.uk  Thu Feb 17 13:49:38 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Thu, 17 Feb 2005 18:49:38 +0000
Subject: [EVALUATION] - E02 - ULTIMATE RECIPE TO RESOLVE ALL ISSUES
References: <cuo71l$gig$1@usenet.otenet.gr> <cuv1st$6um$1@swifty.westend.com>
	<cv2m54$hnf$1@usenet.otenet.gr>
Message-ID: <oTF1JdVCdOFCFwep@objmedia.demon.co.uk>

In message <cv2m54$hnf$1 at usenet.otenet.gr>, Ilias Lazaridis 
<ilias at lazaridis.com> writes
>This thread proofs simply the inability of this community [1] to focus 
>on a simple essence.

Incorrect analysis. This thread proves that you have no concept of how 
to interact with the community. If you had done what many people asked 
you to do, which is do some work yourself, then ask questions about the 
few answers you didn't discover yourself, you would have got lots of 
helpful answers. You were told this many times by many people. Also on 
the odd occasion someone did proffer some on-topic advice, sometimes in 
long articles that must have taken some time to produce you'd dismiss 
the article with "It is not on topic, I have not read it". How could you 
know if it is not on topic if you don't read it? Apart from the gross 
rudeness in such an attitude it demonstrates your arrogance, selfishness 
and utter contempt for those replying to you.

And then you have the gall to blame your failure on others...

Next you'll be telling me the world is flat and held up by an infinite 
array of tortoises.
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From deetsNOSPAM at web.de  Mon Feb 21 08:02:48 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 21 Feb 2005 14:02:48 +0100
Subject: lambda closure question
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
	<slrnd1jjo4.jkb.apardon@rcpc42.vub.ac.be>
	<mailman.2891.1108988864.22381.python-list@python.org>
	<slrnd1jlne.jkb.apardon@rcpc42.vub.ac.be>
Message-ID: <37u4dpF5cboqvU1@individual.net>

> But I'll get back at what seems you actually wanted to say:
> That there is no way to rebind 'x' or in my case 'l' and
> with that I have to agree although I personnaly find that
> a lack in python

It's not only that way in python, but in java too. So it seems that there is
a fundamental principle behind it: In a language that allows sideeffects,
these will actually happen.

If you're after side-effect free programming, I recommend using a functional
programming language like ocaml or haskell. In these, you can't mutate
objects at all, only recreate them and rebind them to new variables. This
prevents whole classes of errors - but of course it also introduces all
kinds of other constraints on your programming style, e.g. using monads and
so on.

-- 
Regards,

Diez B. Roggisch


From lard at tardis.ed.ac.molar.uk  Tue Feb  1 08:13:14 2005
From: lard at tardis.ed.ac.molar.uk (Alex Hunsley)
Date: Tue, 01 Feb 2005 13:13:14 GMT
Subject: equivelant of Java's toString() method? (not repr)
In-Reply-To: <WeLLd.29107$B5.4126@fe1.news.blueyonder.co.uk>
References: <WeLLd.29107$B5.4126@fe1.news.blueyonder.co.uk>
Message-ID: <KfLLd.29110$B5.26979@fe1.news.blueyonder.co.uk>

Alex Hunsley wrote:
> Pretty simple seeming question, but can't find answer via google or docs...
> 
> I am using urllib2 as follows:
> 
>  handle = urlopen(req, postdata)         # and URL to return a handle on
>  ...
>  print handle.info()
> 
> the print statement prints out the headers:
> 
> Content-Type: text/html;charset=ISO-8859-1
> Content-Length: 2845
> Date: Tue, 01 Feb 2005 12:40:28 GMT
> Server: Apache Coyote/1.0
> Connection: close
> 
> which is the string I want to use.
> However, if I write a function call using this:
> 
>   log(handle.info())
> 
> I get this:
> 
>  TypeError: cannot concatenate 'str' and 'instance' objects
> 
> (The log function expects a string)
> What is the magic incantation to get the string I want so I can pass it 
> to my function?
> I've tried repr() but that isn't it (I suspected it wouldn't be).
> I suppose I'm looking for the equivelant of Java's toString() method...
> 
> thanks!
> alex

Replying to meself...
D'oh! Just found the str() function which is just what I need!

log(str(handle.info())) works fine....

thx
alex


From jeff at ccvcorp.com  Thu Feb  3 16:13:17 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Thu, 03 Feb 2005 13:13:17 -0800
Subject: Basic file operation questions
In-Reply-To: <opslnm1cge1js0xs@news.telkomsa.net>
References: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
	<opsllt9r191js0xs@news.telkomsa.net>
	<mailman.1808.1107431422.22381.python-list@python.org>
	<ctt53b$l5u$00$1@news.t-online.com>
	<opslnm1cge1js0xs@news.telkomsa.net>
Message-ID: <11054ttdjkcls45@corp.supernews.com>

Caleb Hattingh wrote:

> Peter
> 
>> Yes, you can even write
>>
>> f = open("data.txt")
>> for line in f:
>>     # do stuff with line
>> f.close()
>>
>> This has the additional benefit of not slurping in the entire file at  
>> once.
> 
> Is there disk access on every iteration?   I'm guessing yes?  It 
> shouldn't  be an issue in the vast majority of cases, but I'm naturally 
> curious :)

Disk access should be buffered, possibly both at the C-runtime level 
and at the file-iterator level (though I couldn't swear to that).  I'm 
sure that the C-level buffering happens, though.

Jeff Shannon
Technician/Programmer
Credit International



From roy at panix.com  Wed Feb 16 19:26:46 2005
From: roy at panix.com (Roy Smith)
Date: Wed, 16 Feb 2005 19:26:46 -0500
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net>
	<eppstein-211DEC.14245416022005@news.service.uci.edu>
Message-ID: <roy-4DE9E8.19264616022005@reader2.panix.com>

In article <eppstein-211DEC.14245416022005 at news.service.uci.edu>,
 David Eppstein <eppstein at ics.uci.edu> wrote:

> In article <37hippF4gcimiU1 at individual.net>,
>  Leo Breebaart <leo at lspace.org> wrote:
> 
> > What I can't find an explanation for is why str.join() doesn't
> > automatically call str() on its arguments, so that e.g.
> > str.join([1,2,4,5]) would yield "1245", and ditto for e.g.
> > user-defined classes that have a __str__() defined.
> 
> That would be the wrong thing to do when the arguments are unicodes.

Why would it be wrong?  I ask this with honest naivete, being quite 
ignorant of unicode issues.


From steve at holdenweb.com  Fri Feb  4 14:27:44 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 04 Feb 2005 14:27:44 -0500
Subject: string issue
In-Reply-To: <cu0i3o$jc6$1@solaris.cc.vt.edu>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
Message-ID: <36QMd.103084$Jk5.36127@lakeread01>

rbt wrote:

> Either I'm crazy and I'm missing the obvious here or there is something 
> wrong with this code. Element 5 of this list says it doesn't contain the 
> string 255, when that's *ALL* it contains... why would it think that???
> 
> import time
> 
> ips = ['255.255.255.255', '128.173.120.79', '198.82.247.98', 
> '127.0.0.1', '255.0.0.0', '255', '128.173.255.34']
> 
> for ip in ips:
>     if '255' in ip:
>         try:
>             print "Removing", ip
>             ips.remove(ip)
>         except Exception, e:
>             print e
> 
> print ips
> time.sleep(5)
> 
> Someone tell me I'm going crazy ;)

You are modifying the list as you iterate over it. Instead, iterate over 
a copy by using:

for ip in ips[:]:
   ...

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From robey at flaminglunchbox.net  Wed Feb  2 01:31:06 2005
From: robey at flaminglunchbox.net (Robey Holderith)
Date: Wed, 02 Feb 2005 01:31:06 -0500
Subject: Newbie Question
References: <mailman.1718.1107308479.22381.python-list@python.org>
Message-ID: <pan.2005.02.02.06.31.06.83408@flaminglunchbox.net>

On Tue, 01 Feb 2005 17:47:39 -0800, Joel Eusebio wrote:

> 
> Hi Everybody,
> 
> I'm pretty new to Python and would like to ask a few questions. I have this
> setup on a Fedora Core 3 box.
> 
> Python 2.3.4
> wxPython-common-gtk-ansi-2.5.3.1-fc2_py2.3
> mod_python-3.1.3-5
> Apache/2.0.52
> 
> I have a test.py which looks like this:
> from mod_python import apache
> def handler(req):
>        req.write("Hello World!")
>        return apache.OK
> 

This code looks like you are attempting to define a handler.  In this case
the handler needs to be properly set up in either your httpd.conf or a
.htaccess (assuming your configuration allows for that).

> Whenever I access test.py from my browser it says "The page cannot be found"
> , I have the file on /var/www/html, what did I miss?

You don't access handlers like you do CGI.  This problem likely lies in
your configuration and not in your code.  I would look at mod_python's
documentation some more and probably start with mod_python's
PublisherHandler for initial testing and experimentation.

-Robey Holderith

>  Thanks in advance,
> Joel




From mhuffnagle at knowtechnology.net  Tue Feb  8 13:18:13 2005
From: mhuffnagle at knowtechnology.net (Marc Huffnagle)
Date: Tue, 08 Feb 2005 18:18:13 GMT
Subject: Is Python as capable as Perl for sysadmin work?
In-Reply-To: <mailman.2204.1107885796.22381.python-list@python.org>
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
	<mailman.2204.1107885796.22381.python-list@python.org>
Message-ID: <Fn7Od.767$Sd.173030@newshog.newsread.com>

Jeff Epler wrote:
> 
> There's another little-known fact about Python:  No string is permitted
> to end with a backslash!  You might think that variations like
>     r'\'
> or
>     """"""\\\\\""""""
> would allow you to create this elusive value, but you'd mistaken!
> Now, this may not bother Unix sysadmins, but the honest truth is that
> you'll be administrating Windows systems, too, anywhere you work!

 >>> a = "\\"
 >>> print a
\

Marc


From phil at riverbankcomputing.co.uk  Thu Feb 10 04:18:34 2005
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Thu, 10 Feb 2005 09:18:34 -0000 (GMT)
Subject: PyQt and Python 2.4 - also WinXP LnF?
In-Reply-To: <1108003471.242829.297030@o13g2000cwo.googlegroups.com>
References: <1108003471.242829.297030@o13g2000cwo.googlegroups.com>
Message-ID: <47718.82.68.80.137.1108027114.squirrel@river-bank.demon.co.uk>

> After quite a while of wxPython I'm getting back into PyQt, mainly due
> to the announcement by Trolltech that they will make a GPL version of
> Qt4 for Windows (and Phil-T said he will make a PyQt to go with it
> eventually!)
>
> I'm currently using PyQt 3.12 that comes with the BlackAdder demo, it
> seems to work fine with Python 2.3.5 except that it doesn't support the
> WinXP look'n'feel, the QStyle "WindowsXP" isn't included, and using a
> manifest file doesn't seem to fix this.
>
> Does anyone know if the latest PyQt (3.13?) is built with this support?
> I thought this had been supported since 3.10 or earlier, is it just the
> BlackAdder build that's "broken"?

PyQt supports the WindowsXP style if Qt has been built with it enabled.

> I'm writing an XMMS remote control program, so it will be GPL when
> released (if it's ever good enough to release!) so I'm looking at
> buying the commercial PyQt3 or BlackAdder whilst waiting for the GPL
> PyQt4
>
> Can I use the commercial PyQt without a commercial Qt - I guess I could
> as long as I don't distribute the qt-mt333.dll? I have no use for Qt
> itself, not interested in C++, so it seems a bit much to have to buy a
> license just for a DLL!

No. PyQt is supplied as a source package. You don't have the Qt .h files
needed to compile it. One point of the BlackAdder license is that you
can't use the bundled version of Qt to build C++ applications - even if
that C++ application is another version of PyQt.

> Also, would I have to build it all myself or does Riverbank/TheKompany
> provide binaries like PyQt 3.13 for Python 2.4, as I don't have Visual
> Studio I can't build it myself.

We don't provide binaries, but the free MSVC, Borland and MinGW compilers
are all supported.

> OK, I'm off to check on my build of PyQt on my Fedora2/Python 2.4
> machine ;-)

Phil



From theller at python.net  Thu Feb 10 13:21:25 2005
From: theller at python.net (Thomas Heller)
Date: Thu, 10 Feb 2005 19:21:25 +0100
Subject: pyFMOD writing a callback function in Python
References: <370m88F525p5uU1@individual.net>
Message-ID: <brasff8a.fsf@python.net>

Marian Aldenh?vel <marian at mba-software.de> writes:

> Hi,
>
> I am using the FMOD audio-library with the pyFMOD python bindings. pyFMOD uses
> ctypes.

I was looking into this recently, because another poster also asked
about pyFMOD: which FMOD version do you use?  I was only able to find
fmodapi374.zip (for windows), and that version doesn't seem to work with
the pyFMOD release I found.

> It is possible to register callback functions with FMOD that are
> called at certain points in the processing pipeline or when certain events
> happen.
>
> I am expecially interested in the one that fires when a currently playing
> stream ends. This is what the declaration in pyFMOD looks like:
>
>    _FSOUND_Stream_SetEndCallback =
>       getattr(fmod,"_FSOUND_Stream_SetEndCallback at 12")
>    _FSOUND_Stream_SetEndCallback.restype = c_byte
>    def FSOUND_Stream_SetEndCallback(stream, callback, userdata):
>       result = _FSOUND_Stream_SetEndCallback(c_int(stream), c_int(callback),
>                                              c_int(userdata))
>       if not result: raise fmod_exception()
>
> I cannot make it work, however. I tried:
>
>    def _sound_end_callback(stream,buf,len,userdata):
>      print "_sound_end_callback(): Stream has reached the end."
>
> as simplest possible callback function. I am registering it like this:
>
>    pyFMOD.FSOUND_Stream_SetEndCallback(_currenttrack,_sound_end_callback,0)
> 				
> And this is how my program dies:
>
>    File "d:\projekte\eclipse\workspace\gettone\gettonesound.py", line
>    175, in sound_tick
>      pyFMOD.FSOUND_Stream_SetEndCallback(_currenttrack,_sound_end_callback,0)
>    File "c:\programme\Python23\lib\site-packages\pyFMOD.py", line 690,
>    in FSOUND_Stream_SetEndCallback
>      result = _FSOUND_Stream_SetEndCallback(c_int(stream),
>      c_int(callback), c_int(userdata))
> TypeError: int expected instead of function instance

The first problem is that the FSOUND_Stream_SetEndCallback function, as
given, converts all parameters to integers.
Second, you cannot pass a Python function directly as callback, you have
to create a function prototype first which specifies calling convention,
return type, and argument types.
Third, you instantiate the prototype with a Python callable, which
creates the C callable callback function, and use that in the
FSOUND_Stream_SetEndCallback call.
All in all, it should look similar (I can't test it!) to this code:

_FSOUND_Stream_SetEndCallback = getattr(fmod,"_FSOUND_Stream_SetEndCallback at 12")
_FSOUND_Stream_SetEndCallback.restype = c_byte
def FSOUND_Stream_SetEndCallback(stream, callback, userdata):
   result = _FSOUND_Stream_SetEndCallback(c_int(stream), callback,
                                          c_int(userdata))
   if not result: raise fmod_exception()

# from the FMOD header file:
##typedef signed char (F_CALLBACKAPI *FSOUND_STREAMCALLBACK)
##  (FSOUND_STREAM *stream, void *buff, int len, void *userdata);

# funtion prototype
FSOUND_STREAMCALLBACK = WINFUNCTYPE(c_char, c_int, c_void_p, c_int, c_void_p)

# create callback function
callback_function = FSOUND_STREAMCALLBACK(_sound_end_callback)

# and then put it to work:

FSOUND_Stream_SetEndCallback(stream, callback_function, userdata)


You should also be aware that you have to keep the callback_function
object alive *as long as the FMOD library is using it*!  If you don't,
it will probably crash.

> I am very new to Python and have zero idea what the problem is nor how to
> solve it. In some of my other languages I would have to explicitly make a
> function pointer and possibly have to cast that to an int to pass it to
> SetEndCallback, but that seems very inappropriate in Python...

Thomas


From ncoghlan at iinet.net.au  Thu Feb 10 07:59:31 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Thu, 10 Feb 2005 22:59:31 +1000
Subject: empty classes as c structs?
In-Reply-To: <1grpz9z.tycvyx1jrdzeiN%aleaxit@yahoo.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<7rSdne7BcbDeV57fRVn-jg@comcast.com>	<mailman.1963.1107594941.22381.python-list@python.org>	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>	<mailman.1973.1107618702.22381.python-list@python.org>	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>	<mailman.2006.1107658273.22381.python-list@python.org>	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>	<mailman.2049.1107750700.22381.python-list@python.org>	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com>	<4207606E.4040806@iinet.net.au>
	<cu8amb$ufa$1@sea.gmane.org>	<mailman.2158.1107859833.22381.python-list@python.org>	<1grnyld.1t8l5kw1nr5aqsN%aleaxit@yahoo.com>	<mailman.2238.1107950220.22381.python-list@python.org>
	<1grpz9z.tycvyx1jrdzeiN%aleaxit@yahoo.com>
Message-ID: <420B5AB3.7090405@iinet.net.au>

Alex Martelli wrote:
> Nick Coghlan <ncoghlan at iinet.net.au> wrote:
>>For bindings, you could just go with standard Python semantics - normal
>>name binding always happens in the innermost scope, so binding a name in a
>>namespace should happen in the directly referenced namespace. Then you can
>>shadow names from outer scopes, and later regain access to them using
>>'del'.
> 
> 
> ...which you can't do in "standard Python semantics" - if a name is
> local, it's local throughout.  You can't do that with a namespace
> object, which is why I think the best semantics for bindings in that
> case isn't all that clear.

Heh. I was getting two sets of terminology confused. The nested scopes of 
functions, and the 'fallback to class' of class instances.

It was the latter I actually meant by 'standard Python semantics' for binding in 
a 'chained' namespace:

Py> class C(object):
...   x = 1
...
Py> c = C()
Py> c = C()
Py> c.x
1
Py> del c.x
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
AttributeError: 'C' object attribute 'x' is read-only
Py> c.x = 2
Py> c.x
2
Py> del c.x
Py> c.x
1
Py> del c.x
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
AttributeError: x

(Huh, I wonder why the error message changed second time around)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From tjreedy at udel.edu  Tue Feb  1 22:25:59 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 1 Feb 2005 22:25:59 -0500
Subject: Suggesion for an undergrad final year project in Python
References: <1107241918.722156.123590@c13g2000cwb.googlegroups.com>
Message-ID: <ctph7f$e3i$1@sea.gmane.org>


"Sridhar" <sridharinfinity at gmail.com> wrote in message 
news:1107241918.722156.123590 at c13g2000cwb.googlegroups.com...
> Hi,
>
> I am doing my undergrade CS course.  I am in the final year, and would
> like to do my project involving Python.  Our instructors require the
> project to have novel ideas.  Can the c.l.p people shed light on this
> topic?

Some months ago, maybe a year ago, Brett Cannon asked on the Py-Dev mailing 
list a similar question about a CS master's thesis.  He got around 10 
sensible suggestions.  Perhaps a few could be scaled down to a senior 
thesis level.  In any case, you could check the archives at www.python.com 
of the pydev summaries that he prepares every two weeks ago.

Terry J. Reedy





From adam at cognitcorp.com  Tue Feb 15 14:20:35 2005
From: adam at cognitcorp.com (Adam DePrince)
Date: Tue, 15 Feb 2005 14:20:35 -0500
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cutf1h$576$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<cupstp$an7$2@ctb-nnrp2.saix.net> <cupupa$kfs$2@usenet.otenet.gr>
	<cupvhi$c15$1@news1.ucsd.edu> <cuq084$r99$1@usenet.otenet.gr>
	<cuq2h0$j2s$1@eeyore.INS.cwru.edu> <cuq57b$j83$1@usenet.otenet.gr>
	<37bkemF5a7s7vU1@individual.net> <cut6nh$rpk$1@usenet.otenet.gr>
	<86ll9piuj8.fsf@guru.mired.org>  <cutf1h$576$1@usenet.otenet.gr>
Message-ID: <1108495235.4186.18.camel@localhost.localdomain>

On Tue, 2005-02-15 at 13:29, Ilias Lazaridis wrote:
> Mike Meyer wrote:
> > Ilias Lazaridis <ilias at lazaridis.com> writes:
> > 
> >>MinGW compatibility is not my need.
> > 
> > Then why do you waste so much effort whining about it not being given
> > to you?
> > 
> >>It is an community need.
> > 
> > Based on the evidence at hand, this is a false statement.
> > 
> >       <mike
> 
> MinGW compatibility is not [only] my need.
> 
> It is an community need [at least partially]

And herein lies the beauty of the noble meritocratic free software
movement.  

If the community needs it, a member of said community has both complete
unfettered freedom and a supportive environment to make it.   Any amount
of success at such an endeavor, even a feeble failure of an attempt,
would bring kudos the hero who attempts such a feat and possibly
organize unfathomable resources in the attendance of such a lofty goal.

Make us proud Ilias.  But whatever you do, don't beg.


Adam DePrince 



From scott+python at CS.Princeton.EDU  Wed Feb 16 21:45:50 2005
From: scott+python at CS.Princeton.EDU (Scott)
Date: Wed, 16 Feb 2005 21:45:50 -0500
Subject: Help with C extensions under VC6 / WinXP and Python 2.4
In-Reply-To: <s30811dnlp51u3t1td3s6q0efp7b3m2ma0@4ax.com>
References: <mailman.2731.1108605453.22381.python-list@python.org>
	<s30811dnlp51u3t1td3s6q0efp7b3m2ma0@4ax.com>
Message-ID: <4214055E.2090408@cs.princeton.edu>



John Machin wrote:
 > On Wed, 16 Feb 2005 20:57:18 -0500, Scott
 > <scott+python at CS.Princeton.EDU> wrote:
 >
 >
 >>I've installed Python 2.4 under WinXP and am attempting to
 >>create an extension module using the steps outlined here:
 >>http://python.org/doc/2.4/ext/win-cookbook.html
 >>
 >>I'm specifically trying to perform step 6. Creating a brand
 >>new project using VC6.
 >>
 >>The trouble I have is that there are no PC or PCbuild
 >>subdirectories in C:\Python24.  Where do I find these?
 >
 >
 > As the quoted URL says (2nd para):
 > """
 > To build extensions using these instructions, you need to have a copy
 > of the Python sources of the same version as your installed Python.
 > [snip]
 > The example files described here are distributed with the Python
 > sources in the PC\ example_nt\ directory
 > """
 >
 > i.e. you have to download a copy of the Python source distribution.

Since I had an include directory, I assumed (incorrectly) that
I already had the sources.  Thanks for the reiteration -- it's
what I needed.

 >
 >
 >>Ultimately, what I want to do is interface some Python
 >>code with a DLL that controls an A/D board.  I expect
 >>I'll need to write an extension module to act as a shim
 >>between this DLL and the Python code.
 >
 >
 > Possibly not; check out the ctypes module --
 > http://starship.python.net/crew/theller/ctypes/

Thanks for the pointer.  This looks promising.

Scott


From john at grulic.org.ar  Tue Feb  8 18:31:18 2005
From: john at grulic.org.ar (John Lenton)
Date: Tue, 8 Feb 2005 20:31:18 -0300
Subject: Big development in the GUI realm
In-Reply-To: <5175a81c05020815194228af51@mail.gmail.com>
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<4207c8db$0$21623$a1866201@visi.com>
	<cub12p$pke$1@achot.icm.edu.pl>
	<5175a81c05020815194228af51@mail.gmail.com>
Message-ID: <20050208233118.GB10229@grulic.org.ar>

On Tue, Feb 08, 2005 at 09:19:58PM -0200, Gabriel B. wrote:
> > However, imagine simple situation:
> > 1. I write proprietary program with open plugin api. I even make the api
> > itself public domain. Program works by itself, does not contain any
> > GPL-ed code.
> 
> No need to continue. You write something that uses a plugin, Eolas
> sues you. Don't have to mind about trolltech

not if you live in a sane country.

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
Preserve wildlife -- pickle a squirrel today!
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From steven.bethard at gmail.com  Fri Feb 11 12:20:37 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 11 Feb 2005 10:20:37 -0700
Subject: convert list of tuples into several lists
In-Reply-To: <420c5241$0$6619$8fcfb975@news.wanadoo.fr>
References: <cud40u$vqb$01$1@news.t-online.com>
	<36uihlF58p63iU1@individual.net>
	<1107998078.610891.111510@z14g2000cwz.googlegroups.com>
	<QrOdnf4DLK2hjpbfRVn-hw@comcast.com>
	<420c5241$0$6619$8fcfb975@news.wanadoo.fr>
Message-ID: <sb-dnTIKT4_9dJHfRVn-sg@comcast.com>

Pierre Quentel wrote:
> Could someone explain why this doesn't work :
> 
> Python 2.3.2 (#49, Oct  2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)] on 
> win32
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> def f(*args,**kw):
> ...     print args, kw
> ...
>  >>> f(*[1,2])
> (1, 2) {}
>  >>> f(*[1,2],x=1)
>   File "<stdin>", line 1
>     f(*[1,2],x=1)
>              ^
> SyntaxError: invalid syntax
>  >>>

http://docs.python.org/ref/calls.html

Steve


From jeff at ccvcorp.com  Thu Feb 10 12:36:42 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Thu, 10 Feb 2005 09:36:42 -0800
Subject: newbie question
In-Reply-To: <t8vl01pgp5pfdjbu8ki9ovue8ud2gk1q1k@4ax.com>
References: <1107990182.516041.120410@o13g2000cwo.googlegroups.com>
	<xfOdnUnRLYukB5ffRVn-tA@powergate.ca>
	<1107992130.921664.68860@z14g2000cwz.googlegroups.com>
	<110lgig2to6r139@corp.supernews.com>
	<t8vl01pgp5pfdjbu8ki9ovue8ud2gk1q1k@4ax.com>
Message-ID: <110n6qr9i7eg239@corp.supernews.com>

Dennis Lee Bieber wrote:

> On Wed, 09 Feb 2005 18:10:40 -0800, Jeff Shannon <jeff at ccvcorp.com>
> declaimed the following in comp.lang.python:
> 
> 
>>for i in range(n)[::-1]:
>>     func(n)
> 
> 
> 	Shouldn't that be
> 		func(i)
> (the loop index?)

You're right, that's what I *meant* to say.  (What, the interpreter 
doesn't have a "do what I mean" mode yet? ;) )

>>The '[::-1]' iterates over the range in a reverse (decreasing) 
>>direction; this may or may not be necessary depending on the 
>>circumstances.
> 
> 	Eeee.... sneaky... (I'm a bit behind on latest syntax additions)
> 
> 	I'd probably have coded something like
> 
> for n1 in range(n):
> 	func(n-n1)
> 
> though, and note that I do admit it here  [...]

Given a need/desire to avoid extended slicing (i.e. being stuck with 
an older Python, as I often am), I'd actually do this by changing the 
input to range(), i.e.

     for i in range(n, 0, -1):   # ...

That (IMO) makes the decreasing-integer sequence a bit clearer than 
doing subtraction in the function parameter list does.  Actually, it's 
possibly clearer than the extended slicing, too, so maybe this would 
be the better way all around... ;)

> I haven't done the detailed
> analysis to properly set the end point... 

And as Peter Hansen points out, none of the Python versions leave n in 
the same state that the C loop does, so that's one more way in which 
an exact translation is not really possible -- and (IMO again) further 
evidence that trying to do an exact translation would be 
ill-conceived.  Much better to consider the context in which the loop 
is used and do a looser, idiomatic translation.

Jeff Shannon
Technician/Programmer
Credit International



From jb_perin at yahoo.fr  Tue Feb  8 05:22:29 2005
From: jb_perin at yahoo.fr (Jean-Baptiste PERIN)
Date: Tue, 08 Feb 2005 11:22:29 +0100
Subject: how to convert 4 bytes into a float ?
Message-ID: <cua4gu$pf7$1@s1.news.oleane.net>


I read 4 bytes from a binary file.

These bytes represent a floating point number (mantisse exponent form)

How can I get a float from these bytes ?



From alecw at pobox.com  Wed Feb  9 17:24:59 2005
From: alecw at pobox.com (Alec Wysoker)
Date: Wed, 09 Feb 2005 17:24:59 -0500
Subject: Crash in thread on program termination
Message-ID: <6.1.2.0.0.20050209171159.0254b1a8@mail.comcast.net>

I have several programs that have two or more threads.  The threads that are not the main thread are daemon threads, i.e. the fact that they are running should not stop the program from terminating if the main thread (the only non-daemon thread) terminates.  I do not join to these threads, but just run off the end of the main module to terminate the program.  I'm using Python 2.3.4.  I occasionally get the following error:

Traceback (most recent call last):
  File "C:\Python23\lib\threading.py", line 451, in __bootstrap
    self.__stop()
  File "C:\Python23\lib\threading.py", line 460, in __stop
    self.__block.notifyAll()
  File "C:\Python23\lib\threading.py", line 256, in notifyAll
    self.notify(len(self.__waiters))
  File "C:\Python23\lib\threading.py", line 238, in notify
    currentThread() # for side-effect
TypeError: 'NoneType' object is not callable


What seems to be happening is that at the time the thread is stopped, the threading module object is no longer in an unhealthy state.  I.e. threading.currentThread is None.  I hacked around this problem by substituting my own code for _Condition.notifyAll() that would not call notify() if there were no waiters to be notified.  However, that merely allowed the code to get a little further, before crashing with a similar problem, i.e. threading._StringIO is None instead of being a class object.

Traceback (most recent call last):
  File "C:\Python23\lib\threading.py", line 443, in __bootstrap
    s = _StringIO()
TypeError: 'NoneType' object is not callable


I turned on threading.__debug__ and threading._VERBOSE to get some debug output, and one thing that is strange is that I don't get the debugging output I expect.

# From threading.Thread.__bootstrap():
            try:
                self.run()
            except SystemExit:
                if __debug__:
                    self._note("%s.__bootstrap(): raised SystemExit", self)
            except:
                if __debug__:
                    self._note("%s.__bootstrap(): unhandled exception", self)
                s = _StringIO()
                _print_exc(file=s)
                _sys.stderr.write("Exception in thread %s:\n%s\n" %
                                 (self.getName(), s.getvalue()))
            else:
                if __debug__:
                    self._note("%s.__bootstrap(): normal return", self)
        finally:
            self.__stop()   # Line 451


I.e. I would expect to get one of the messages ('raised SystemExit', 'unhandled exception', or 'normal return') before self.__stop() is called at line 451.  However, I do not see any of those messages.

Any ideas or suggestions?  I am baffled.

Thanks,

Alec Wysoker




From invalidemail at aerojockey.com  Wed Feb  9 21:19:59 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 9 Feb 2005 18:19:59 -0800
Subject: negative integer division
References: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
	<42096EAD.879E8A5F@yahoo.com> <86wtti76cp.fsf@guru.mired.org>
	<420A916C.94F7F175@yahoo.com>
Message-ID: <1108001999.565042.207190@o13g2000cwo.googlegroups.com>

Jive Dadson wrote:
> > Now, I'll agree with you if you want to argue that some machines do
> > negative integer division in stupifyingly horrible ways.
>
> That's why I think it was a stupifyingly horrible decision.
> Understandable, but in the end an s.h.d. nonetheless.


C language is chock-full of things that are stupidly horrible
decisions.  This is one of very least of them.

The philosophy of C was to turn opeations into one or two instructions,
if they could.  Just about any operator in C can be, and having /
invoke a small subprogram would have been the absolute wrong thing to
do.  The other philosophy of C was to make it easy for the programmer
to hand-optimize stuff.  Which means no way was it going to force the
programmer to use quick_div to get the division in two instructions.
It was the right decision.

I would say that a better thing to call this is a stupidly horrible
circumstance.  The circumstance is that an archaic language designed to
be hand-optimized and has unfortuntate importabilities has ever became
everyone's shizzle.

(I'm hating C today; I was asked to write something in C and I can't
use anything else because someone has to use to code.)


-- 
CARL BANKS



From fperez.net at gmail.com  Fri Feb  4 20:25:56 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Fri, 04 Feb 2005 18:25:56 -0700
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot><1107487113.732375.110850@c13g2000cwb.googlegroups.com><opslnmywarej1m1c@ashot><mailman.1865.1107491434.22381.python-list@python.org><opsln54fpwej1m1c@ashot>
	<36hculF51ho2sU1@individual.net><1107530489.308497.103530@g14g2000cwa.googlegroups.com><36hrjpF4ui8fbU1@individual.net>
	<mailman.1911.1107546744.22381.python-list@python.org>
	<36i84qF52ce29U1@individual.net> <opslo127s7ej1m1c@ashot>
	<cu0umf$cja$1@sea.gmane.org>
	<mailman.1936.1107561113.22381.python-list@python.org>
	<opslo7setjej1m1c@ashot>
Message-ID: <cu179i$tui$1@sea.gmane.org>

Ashot wrote:

> One more thing I was wondering about: why not highlight the source code in
> the errors since you already have this functionality (with '??' command).
> It would be nice to have it highlighed on the prompt as well, but I
> imagine this may be more difficult.. I've been using IPython for about a
> week and thats one of the two things I miss..

On the input line, there's no way: ipython only gets what you type when you hit
return.  It would require writing a full-blown IDE to get that.

For the errors, it's a bit tricky because I'd have to use the tokenization code
right inside the exception traceback builder.  That's not particularly easy,
esp. considering that the traceback handler doesn't necessarily have full code
objects.  Tokenizing a chunk of code which may begin half-way through a
function, with possibly an open triply-quoted multiline string in the middle,
can get tricky.

I'm not saying it's impossible, but it's certainly not a very straightforward
task.  I simply haven't found it to be a priority, given that other parts of
ipython need a lot more work.  Heck, those tracebacks are already miles ahead
of what you get from plain python (try 'xmode verbose' for real detailed
info), so for now I'm willing to leave them as they are.

But since it's definitely something which would be a nice improvement, I'll
gladly accept any patches which implement it in a clean, robust way.

Regards,

f



From administrata at hotmail.com  Tue Feb 15 08:39:50 2005
From: administrata at hotmail.com (administrata)
Date: 15 Feb 2005 05:39:50 -0800
Subject: Problems in making calulating program.
Message-ID: <614c778e.0502150539.4aa742a1@posting.google.com>

I wrote this to add 2 numbers...

print "Please input data"
number1 = int(raw_input(" "))
number2 = int(raw_input("+ "))


total = number1 + number2
print total

raw_input("")

I want to make output like this...

1 + 1 = 2

But, actually... it looks like this...

1
+ 1
2

HELP;


From jack at performancedrivers.com  Fri Feb 25 01:19:21 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Fri, 25 Feb 2005 01:19:21 -0500
Subject: Python Online Programming Contest
In-Reply-To: <1109297889.083424.294860@z14g2000cwz.googlegroups.com>
References: <1109278779.955986.193860@z14g2000cwz.googlegroups.com>
	<mailman.3023.1109283350.22381.python-list@python.org>
	<1109297889.083424.294860@z14g2000cwz.googlegroups.com>
Message-ID: <20050225061921.GP9263@performancedrivers.com>

On Thu, Feb 24, 2005 at 06:18:09PM -0800, Varun wrote:
> Hi,
> It is open for anyone across the world. All times are local ( GMT
> +5:30). The contest will be on Feb 27 (this sunday) and i will ensure
> that the times are clearly specified.

How long is the contest?  ICFP is three days (first 24 hours are the "lightning"
submissions for people with wives/lives).  I'm thinking about entering even on
this short notice but I'd like to know what I'm getting into.

Also, consider posting to slashdot if you want more attention.  Each ICFP 
generates a bunch of before/during/after mentions on slashdot each year.  If
there is an Indian slashdot kind of thing you might be better off posting there.
I assume you are trying to get butts in seats for the conference so maybe
100k mostly western eyeballs on slashdot wouldn't help with that goal.  On the 
other hand, it couldn't hurt!

-Jack

http://performancedrivers.com/icfp2002/
[2003 snipped, debacle]
http://performancedrivers.com/icfp2004/


From fredrik at pythonware.com  Wed Feb  2 13:03:10 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 2 Feb 2005 19:03:10 +0100
Subject: Awkwardness of C API for making tuples
References: <dave.opstad-E4D4C4.07281701022005@reader0900.news.uu.net><1107289261.185768.116790@f14g2000cwb.googlegroups.com>
	<dave.opstad-A95B15.15351801022005@reader0900.news.uu.net>
Message-ID: <ctr4jg$1s0$1@sea.gmane.org>

Dave Opstad wrote:

> This would certainly be simpler, although I'm not sure I'm as clear as
> to what happens if, say, in the middle of this loop a PyInt_FromLong
> fails. I know that PyTuple_SetItem steals the reference; does that mean
> I could just Py_DECREF the tuple and all the pieces will be
> automagically freed?

yes.  tuples release their members when you release the tuple (this is pretty
obvious, if you think about it).  they also handle uninitialized items property
(this is also pretty obvious).

here's the code, btw (from tupledealloc in Objects/tupleobject.c):

  while (--i >= 0)
    Py_XDECREF(op->ob_item[i]);

</F> 





From dek at scooby.lbl.gov  Sun Feb 27 13:03:09 2005
From: dek at scooby.lbl.gov (David E. Konerding DSD staff)
Date: Sun, 27 Feb 2005 18:03:09 +0000 (UTC)
Subject: any Python equivalent of Math::Polynomial::Solve?
References: <just-420C1F.16423926022005@news1.news.xs4all.nl>
Message-ID: <slrnd242qt.f57.dek@scooby.lbl.gov>

On 2005-02-26, Just <just at xs4all.nl> wrote:
> While googling for a non-linear equation solver, I found 
> Math::Polynomial::Solve in CPAN. It seems a great little module, except 
> it's not Python... I'm especially looking for its poly_root() 
> functionality (which solves arbitrary polynomials). Does anyone know of 
> a Python module/package that implements that?
>
> Just

Although I dont' really work on it any more, the Py-ML module which interfaces
Python to Mathematica would almost certain be able to do this, although you'd need an installation of 
Mathematica.

http://sourceforge.net/projects/py-ml/



From apardon at forel.vub.ac.be  Mon Feb  7 08:55:35 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 7 Feb 2005 13:55:35 GMT
Subject: variable declaration
References: <4202A022.3050209@netscape.net>
	<MSGID_2=3A5025=2F3.131_4204b0a9@fidonet.org>
	<mailman.1978.1107622451.22381.python-list@python.org>
	<slrnd0epjg.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2069.1107783321.22381.python-list@python.org>
Message-ID: <slrnd0esqn.26q.apardon@rcpc42.vub.ac.be>

Op 2005-02-07, Nick Coghlan schreef <ncoghlan at iinet.net.au>:
> Antoon Pardon wrote:
>> Op 2005-02-05, Nick Coghlan schreef <ncoghlan at iinet.net.au>:
>> 
>> 
>>>[ ... ]
>>>
>>>With a rebinding operator, the intent of the last line can be made explicit:
>>>
>>>def collapse(iterable):
>>>     it = iter(iterable)
>>>     lastitem = it.next()
>>>     yield lastitem
>>>     for item in it:
>>>         if item != lastitem:
>>>             yield item
>>>             lastitem .= item
>>>
>>>(Note that doing this *will* slow the code down, though, since it has to check 
>>>for the existence of the name before rebinding it)
>> 
>> 
>> I think that most of the time it won't slow down the code as the
>> checking will have been done during the compilation phase. It
>> may even speed up code like this, because the compilation
>> phase will have established that it is a rebinding and so
>> code for testing whether a new variable is created or not
>> is not necessarry here.
>> 
>
> Since unbound locals are generally detected at runtime rather than compile time, 
> I see no real reason why this case would be any different. Static checks would 
> be in the hands the tools like pychecker (as is currently the case for 
> references to unbound locals)
>
> Py> def f():
> ...   x
> ...   x= 3
> ...
> Py> f()
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
>    File "<stdin>", line 2, in f
> UnboundLocalError: local variable 'x' referenced before assignment
>
> So I'd expect the compiler to generate slower code for it (probably just a 
> LOAD/STORE pair instead of just a STORE instruction),

Why should we limit ourselves to instructions already existing.
The compilor might generate a RESTORE instruction.

> but the optimiser should 
> eventually be able to do something to eliminate the performance penalty due to 
> the technically unnecessary LOAD. I doubt it will be able to beat a STORE_FAST 
> when it comes to trying to get a performance improvement, though :)

But maybe a RESTORE_FAST could.

-- 
Antoon Pardon


From ncoghlan at iinet.net.au  Fri Feb  4 07:55:02 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 04 Feb 2005 22:55:02 +1000
Subject: python equivalent to haskells iterate.
In-Reply-To: <20050204104037.44037.qmail@web26501.mail.ukl.yahoo.com>
References: <20050204104037.44037.qmail@web26501.mail.ukl.yahoo.com>
Message-ID: <420370A6.8080500@iinet.net.au>

Graeme Caldwell wrote:
> What this does is takes as a paramter a decimal integer and converts
> it to a sequence in which each member is numeral from each position in
> the integer.

For this specific problem, the builtin 'str' is your best bet:

   digit_list = map(int, str(val))

(If you only want to display the digits, you can use list(str(val)) to leave 
them as strings rather than converting back to an int)

However, that doesn't really fit with the general 'iterate' question you were 
asking. For that, something like a generator function is likely to help:

   def digits(val):
     if val:
       while val:
         val, digit = divmod(val, 10)
         yield digit
     else:
       yield 0

   digit_list = list(reversed(list(digits(val))))

Basically, I think the 'yield' keyword and generator functions are likely what 
you are looking for when it comes to easily building iterators.

However, continuing on with the attempt to write Haskell in Python, making the 
generator function 'dumber' by eliminating its knowledge of the termination 
condition gets us closer to the original:

   from itertools import takeWhile

   def next_digit(val):
     while 1:
       val, digit = divmod(val, 10)
       yield digit

   digit_list = list(reversed(list(
                      takewhile(lambda digit: digit, next_pair(val)))))


For cases where you don't need to do an assignment each time through the loop 
(e.g. by dividing by progressively larger multiples of 10 instead of using 
repeated division), you can ditch the function and use a generator expression 
instead:

   from itertools import takewhile, count
   digit_list = reversed(
                  list(
                    takewhile(
                      lambda digit: digit,
                      (((val // (10 ** i)) % 10) for i in count())
                    )
                  )
                )

Usually you're going to be better served by making the generator function 
smarter if you're going to be writing one anyway, though.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From usenet_spam at janc.invalid  Mon Feb  7 17:27:33 2005
From: usenet_spam at janc.invalid (JanC)
Date: Mon, 07 Feb 2005 22:27:33 GMT
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
	<7xy8e5jagh.fsf@ruckus.brouhaha.com>
	<1107490052.542546.285950@c13g2000cwb.googlegroups.com>
	<11076nqn1ats421@corp.supernews.com>
Message-ID: <Xns95F6EEA402C1FJanC@213.118.79.171>

Jeffrey Froman schreef:

> M.E.Farmer wrote:
> 
>> Div is a block level tag and span isn't.
>> You can also group them??together?and?nest?them.
> 
> One caveat here -- I don't believe you can (should) nest a <div>
> inside a <span>, or for that matter, nest any block-level element
> inside an inline element.

The following nesting is valid AFAIK:

  <span><object><div></div></object></span>

While this isn't:

  <span><div></div></span>


-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From t-meyer at ihug.co.nz  Wed Feb 23 18:45:32 2005
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Thu, 24 Feb 2005 12:45:32 +1300
Subject: reading only new messages in imaplib
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E8022289FC@its-xchg4.massey.ac.nz>
Message-ID: <ECBA357DDED63B4995F5C1F5CBE5B1E801DAFEC0@its-xchg4.massey.ac.nz>

[Raghul]
>>> Is it posssible to read only the new messages or unread
>>> messages using imaplib in python? If it is possible pls 
>>> specify the module or give a sample code.

[Tony Meyer]
>> This will print out the first 20 chars of each undeleted message. 
>> You should be able to figure out how to do what you want from it.
[...]

[Raghul]
> Received: by twmail.
> Received: from mail.
[...]
> it prints something like this. what it actually display.

Did you read what I wrote, or just run the code?  As I said, it displays the
first 20 characters of each undeleted message.  If you can't see where the
'first 20 characters' bit is in the code, then you really need to forget
about IMAP for the moment and start with the Python tutorial.

> And pls tell me what it actually does? I can't understand

>>> import imaplib

Imports the imaplib module.

>>> i = imaplib.IMAP4("mail.example.com")

Creates an imaplib.IMAP4 instance to be connected to the mail.example.com
server.

>>> i.login("username", "password")

Logs into the server with the username "username" and the password
"password".

>>> i.select()

Selects the inbox.

>>> for msg_num in i.search(None, "UNDELETED")[1][0].split():

Does an IMAP search for UNDELETED messages.  Assumes that [0] of the
response is "OK" and that [1] of the response is a tuple of the string of
the ids.  Splits the string on whitespace and iterates through it.

... 	msg = i.fetch(str(msg_num), "RFC822")

Fetches the message (header and body in RFC822 format) for the given message
number.

... 	print msg[1][0][1][:20]

Digs down through the response (use imaplib.debug = 4 to see it) to get the
message as a string.  Prints out 20 characters of it.

As basically everyone has said, you must read the IMAP RFC and understand it
in order to use imaplib.  Please do so.

=Tony.Meyer



From aurora00 at gmail.com  Mon Feb  7 13:52:11 2005
From: aurora00 at gmail.com (aurora)
Date: Mon, 07 Feb 2005 10:52:11 -0800
Subject: Python Binary and Windows
References: <cu8805$emv$2@news.ox.ac.uk>
Message-ID: <opslub09d86yt6e7@news.cisco.com>

Thanks for making me aware of the difflib module. I don't know there is  
such cool module exists.

You can make it available to other Windows program as a COM object. The  
win32 api should be all you need. It might be slightly challenging because  
some parameters are list of strings which might need a little work to  
translate into COM parameters.

> Hi.
>
> I'd like to compile (?) the DiffLib Python code into a binary form that  
> can
> be called by other Windows apps - like, I'd like to compile it into a  
> DLL.
>
> Is this possible?
>
> Many thanks!
>
>



From bvande at po-box.mcgill.ca  Sun Feb 27 15:25:13 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Sun, 27 Feb 2005 15:25:13 -0500
Subject: Need help running external program
In-Reply-To: <hJpUd.3282122$B07.516470@news.easynews.com>
References: <c2nUd.3268977$B07.514197@news.easynews.com>
	<cvsvbb$nne$01$1@news.t-online.com>
	<vMnUd.3552914$f47.637318@news.easynews.com>
	<38ejcfF5lu11pU1@individual.net>
	<hJpUd.3282122$B07.516470@news.easynews.com>
Message-ID: <42222CA9.1010002@po-box.mcgill.ca>

Rigga said unto the world upon 2005-02-27 15:04:
> Tim Jarman wrote:

<SNIP>

>>No, the r was the point - it's there to tell Python not to do any escaping
>>on the string. Try it again with the r and see what happens.
>>
> 
> Brilliant!!!  that works a treat thankyou!!, where on earth did you find out
> about the 'r'  any pointers to documentation appreciated.
> 
> Thanks 
> 
> RiGGa

<http://www.python.org/doc/current/ref/strings.html>
<http://www.python.org/doc/current/lib/module-re.html>

Best,

Brian vdB


From petite.abeille at gmail.com  Thu Feb 10 13:47:04 2005
From: petite.abeille at gmail.com (PA)
Date: Thu, 10 Feb 2005 19:47:04 +0100
Subject: A great Alan Kay quote
In-Reply-To: <200502101943.36347.francis.girard@free.fr>
References: <420a5c1e$0$21630$a1866201@visi.com>
	<mailman.2270.1107980587.22381.python-list@python.org>
	<cpkl01hg54cbp9mjnnkevbn0chps4psam2@4ax.com>
	<200502101943.36347.francis.girard@free.fr>
Message-ID: <e93d44dc887ffe19d754bc697128b37a@gmail.com>


On Feb 10, 2005, at 19:43, Francis Girard wrote:

> I think he's a bit nostalgic.

Steve Wart about "why Smalltalk never caught on":

http://hoho.dyndns.org/~holger/smalltalk.html

Cheers

--
PA, Onnay Equitursay
http://alt.textdrive.com/




From grante at visi.com  Tue Feb  1 16:57:45 2005
From: grante at visi.com (Grant Edwards)
Date: 01 Feb 2005 21:57:45 GMT
Subject: how about writing some gui to a known console application
References: <1107294520.224155.131640@f14g2000cwb.googlegroups.com>
Message-ID: <41fffb59$0$21637$a1866201@visi.com>

On 2005-02-01, alexrait1 <alexrait at gmail.com> wrote:

> Do something useful... (at least for me)
> For instance I need a gtk frontend for pgp.
> So here you can have an opportunity to learn both pyGTK and pgp. A lot
> of python code... :)

Um, to whom are you addressing your commands?

-- 
Grant Edwards                   grante             Yow!  Kids, don't gross me
                                  at               off... "Adventures with
                               visi.com            MENTAL HYGIENE" can be
                                                   carried too FAR!


From peter at engcorp.com  Sat Feb 26 19:08:45 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 26 Feb 2005 19:08:45 -0500
Subject: Thread scheduling
In-Reply-To: <mailman.3100.1109457191.22381.python-list@python.org>
References: <1109456481.214243.140670@l41g2000cwc.googlegroups.com>
	<mailman.3100.1109457191.22381.python-list@python.org>
Message-ID: <09Kdndga9dgQkrzfRVn-hg@powergate.ca>

Jack Orenstein wrote:
> I am using Python 2.2.2 on RH9, and just starting to work with Python
> threads.

Is this also the first time you've worked with threads in general,
or do you have much experience with them in other situations?

> This program seems to point to problems in Python thread scheduling.

While from time to time bugs in Python are found, it's generally
more productive to suspect one's own code.  In any case, you
wouldn't have posted it here if you didn't suspect your own
code at least a bit, so kudos to you for that. :-)

> done = 0
> def run(id):
>     global done
>     print 'thread %d: started' % id
>     global counter
>     for i in range(nCycles):
>         counter += 1
>         if i % 10000 == 0:
>             print 'thread %d: i = %d, counter = %d' % (id, i, counter)
>     print 'thread %d: leaving' % id
>     done += 1
> 
> for i in range(nThreads):
>     thread.start_new_thread(run, (i + 1,))
> while done < nThreads:
>     time.sleep(1)
>     print 'Still waiting, done = %d' % done
> print 'All threads have finished, counter = %d' % counter

Without having tried to run your code, and without having studied
it for long, I am going to point out something that is at the
very least an inherent defect in your code, though you might
not have used Python (or threads?) for long enough to realize
why.  Note that I don't know if this is the cause of your
particular problem, just that it _is_ a bug.

You've got two shared global variables, "done" and "counter".
Each of these is modified in a manner that is not thread-safe.
I don't know if "counter" is causing trouble, but it seems
likely that "done" is.

Basically, the statement "done += 1" is equivalent to the
statement "done = done + 1" which, in Python or most other
languages is not thread-safe.  The "done + 1" part is
evaluated separately from the assignment, so it's possible
that two threads will be executing the "done + 1" part
at the same time and that the following assignment of
one thread will be overwritten immediately by the assignment
in the next thread, but with a value that is now one less
than what you really wanted.

Look at the bytecode produced by the statement "done += 1":

 >>> import dis
 >>> def f():
...   global done
...   done += 1
...
 >>> dis.dis(f)
   3           0 LOAD_GLOBAL              0 (done)
               3 LOAD_CONST               1 (1)
               6 INPLACE_ADD
               7 STORE_GLOBAL             0 (done)
(ignore the last two lines: they just "return None")
              10 LOAD_CONST               0 (None)
              13 RETURN_VALUE

Note here the "store_global" that is separate from the add
operation itself.  If thread A gets loses the CPU (so to speak)
just before that operation, and thread B executes the entire
suite of operations, then later on when thread A executes
that operation it will effectively result in only a single
addition operation being performed, not two of them.

If you really want to increment globals from the thread, you
should look into locks.  Using the "threading" module (as is
generally recommended, instead of using "thread"), you would
use threading.Lock().  There are other thread synchronization
primitives in the threading module as well, some of which
might be more suitable for your purposes.  Note also the
oft-repeated (in this forum) recommendation that if you simply
use nothing but the Queue module for inter-thread communication,
you will be very unlikely to stumble over such issues.

-Peter


From breamoreboy at aol.com  Sun Feb 20 13:09:29 2005
From: breamoreboy at aol.com (BrainDead)
Date: 20 Feb 2005 10:09:29 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <4218cafe$0$8790$9b622d9e@news.freenet.de>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr>
	<42185b05$0$15460$9b622d9e@news.freenet.de>
	<cv9sdo$69n$3@usenet.otenet.gr>
	<42189527$0$6260$9b622d9e@news.freenet.de>
	<cvadcj$mqc$1@usenet.otenet.gr>
	<mailman.2866.1108917759.22381.python-list@python.org>
	<cvafgu$2lk$1@usenet.otenet.gr>
	<4218cafe$0$8790$9b622d9e@news.freenet.de>
Message-ID: <1108922969.140196.304380@z14g2000cwz.googlegroups.com>

[Snip]

Martin,

I believe that you are wasting your time.  Looking at your email
address, this may well be relevant.

http://groups-beta.google.com/group/de.admin.net-abuse.news/browse_frm/thread/8914399857641c05/4163a4fb8a624349?q=Ilias&_done=%2Fgroup%2Fde.admin.net-abuse.news%2Fsearch%3Fgroup%3Dde.admin.net-abuse.news%26q%3DIlias%26qt_g%3D1%26searchnow%3DSearch+this+group%26&_doneTitle=Back+to+Search&&d#4163a4fb8a624349

Regards.

Mark Lawrence.



From nospam at nospam.fr  Fri Feb 11 03:04:14 2005
From: nospam at nospam.fr (jean-michel)
Date: Fri, 11 Feb 2005 09:04:14 +0100
Subject: python equivalent to access reports
References: <D9LOd.8257$yJ7.474177@phobos.telenet-ops.be>
Message-ID: <cuhond$o5e$1@news.tiscali.fr>

"flupke" <flupke at nonexistingdomain.com> a ?crit dans le message de
news:D9LOd.8257$yJ7.474177 at phobos.telenet-ops.be...
> a lot of applications here a made with access. Tables, forms, reports
> and the like. Now i rather use Python to do this but i'm not sure how to
> proceed. I can use wxPython for a gui via wxGlade for rapid testing and
> design (forms), MySQL as db (tables) but the report part is what's
> bothering me.
>
> Any other ideas?

Hello,
You can use wxwindows (http://www.wxpython.org/) which have some very nice
report classes.
If you want to know more, you just have to download and try the demo.
++jm




From Dennis.Benzinger at gmx.net  Thu Feb 17 18:01:46 2005
From: Dennis.Benzinger at gmx.net (Dennis Benzinger)
Date: Fri, 18 Feb 2005 00:01:46 +0100
Subject: Whats up with re module vs pre
In-Reply-To: <1108675920.201110.81250@z14g2000cwz.googlegroups.com>
References: <1108675920.201110.81250@z14g2000cwz.googlegroups.com>
Message-ID: <42152254$1@news.uni-ulm.de>

pythonUser_07 wrote:
> This is a very generic observation as I don't have a lot of specifics
> with me right now.  I have noticed over the past two years that the
> python "re" module is somewhat unreliable.  

What do you mean with unreliable?
Can you show an example where re does not work as expected?

> At the suggestion of
> someone quite some time ago, I started to use the deprecated "pre"
> module. "import pre as re". All my problems went away.
> 
> So here I am two years later, writing another script and I had
> forgotten about "pre" and wallah
> 
> $ python proc.py
> Traceback (most recent call last):
>   File "proc.py", line 39, in ?
>     c = collect("nohup.out")
>   File "proc.py", line 20, in collect
>     m = p.search(cont)
> RuntimeError: maximum recursion limit exceeded
> 
> As soon as I switched "import re" to "import pre as re" my program
> worked as expected.   In the words of Jerry Sienfeld, what's up with
> that?

Try again with Python 2.4. The re module is now non-recursive
(http://www.python.org/2.4/highlights.html), so you shouldn't get any
"maximum recursion limit exceeded" errors.


Bye,
Dennis


From simoninusa2001 at yahoo.co.uk  Fri Feb 11 15:13:12 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 11 Feb 2005 12:13:12 -0800
Subject: PyQt and Python 2.4 - also WinXP LnF?
In-Reply-To: <1108065099.593832.314470@f14g2000cwb.googlegroups.com>
References: <1108003471.242829.297030@o13g2000cwo.googlegroups.com>
	<mailman.2295.1108027117.22381.python-list@python.org>
	<1108065099.593832.314470@f14g2000cwb.googlegroups.com>
Message-ID: <1108152792.710263.117650@z14g2000cwz.googlegroups.com>

I've just got Qt 3.3.3 and PyQt 3.1.3 compiled for Python 2.4 using the
instructions for MinGW here:

http://kscraft.sourceforge.net/convert_xhtml.php?doc=pyqt-windows-install.xhtml

It was a pretty nasty experience, hacking python24.dll and patching
sip/PyQt, but i got it all working after about 4 hours! It still
doesn't support the XP LnF, but at least I have a non-limited
QtDesigner etc. now, and something I can distribute for Windows which
supports Python 2.4/QScintilla.

I couldn't get it to work with the free MS compiler (VC2003 command
line tools and 1.1 SDK) as they were missing libraries etc. I guess the
docs are referring to a full Visual Studio .NET 2003



From grante at visi.com  Tue Feb 22 10:42:59 2005
From: grante at visi.com (Grant Edwards)
Date: 22 Feb 2005 15:42:59 GMT
Subject: Copy functio in imaplib
References: <1109049046.015244.121070@l41g2000cwc.googlegroups.com>
Message-ID: <421b5303$0$46534$a1866201@visi.com>

On 2005-02-22, Raghul <raghulj at gmail.com> wrote:

> What is message_set in the python documentation for copy in imaplib?

It's a list of message numbers.  The ones returned by a
"SEARCH" command.

> Is they referring message set to the particular mail message
> in my inbox or something else.

?

Have you read the IMAP RFC?

http://www.faqs.org/rfcs/rfc2060.html

-- 
Grant Edwards                   grante             Yow!  Are you mentally here
                                  at               at Pizza Hut??
                               visi.com            


From wittempj at hotmail.com  Thu Feb 17 15:25:29 2005
From: wittempj at hotmail.com (wittempj at hotmail.com)
Date: 17 Feb 2005 12:25:29 -0800
Subject: TypeError: send() argument 1 must be string or read-only buffer,
	not int
In-Reply-To: <mailman.2770.1108671387.22381.python-list@python.org>
References: <mailman.2770.1108671387.22381.python-list@python.org>
Message-ID: <1108671929.813837.140620@c13g2000cwb.googlegroups.com>

if you want to send the value '1000' over a socket connection in a
socket object do something like sock.send(str(1000))  if socket is a
socket.socket object.



From nitinzep at yahoo.com  Fri Feb 11 17:41:11 2005
From: nitinzep at yahoo.com (Nitin Chaumal)
Date: 11 Feb 2005 14:41:11 -0800
Subject: Trouble using telentlib
Message-ID: <467fdeba.0502111441.4a558e2a@posting.google.com>

I sarched the existing threads but didnt find an answer to this.

I am writing simple script which uses telentlib to open a session with
a unix machine and run "tail -f logfile.txt" on one of the logfiles.

import telnetlib

HOST = "192.X.X.X"
user = "myname"
password = "mypass"

tn = telnetlib.Telnet(HOST)

tn.read_until("login: ")
tn.write(user + "\n")
if password:
    tn.read_until("Password: ")
    tn.write(password + "\n")

tn.write("tail -f /tmp/logfile.txt\n")

# what do i write here ? #

tn.write("exit\n")

I want to read every line of the output into a string and run regex on
it.
I tried tn.interact() which does show me the ouput but the CPU usage
on my win2k machine reaches 99% !! :(

How do i execute a command and then read its output, then another
command and read its output and so on. I tried to find docs on
telnetlib but in vain.

Can somebody guide me please

Thanks
Nitin


From jerf at jerf.org  Thu Feb 17 09:48:00 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 17 Feb 2005 09:48:00 -0500
Subject: Alternative to standard C "for"
References: <1107628331.816935.16760@o13g2000cwo.googlegroups.com>
	<740c3aec050205104924a82d23@mail.gmail.com>
	<1108620618.3892.85.camel@lipscomb.mbi.ucla.edu>
	<mailman.2764.1108664524.22381.python-list@python.org>
Message-ID: <pan.2005.02.17.14.47.59.685297@jerf.org>

On Thu, 17 Feb 2005 10:22:01 -0800, James Stroud wrote:
> It seems I need constructs like this all of the time
> 
> i = 0
> while i < len(somelist):
>   if oughta_pop_it(somelist[i]):
>     somelist.pop(i)
>   else:
>     i += 1
> 
> There has to be a better way...
> 
> Any thoughts?

Others have pointed out

somelist = [x for x in somelist if not oughta_pop_it(x)]

but I'd also point out what I haven't seen, that your algorithm is O(n^2)
making fairly reasonable assumptions, whereas the list comprehension is
O(n). For long lists, that adds up fast. In fact, if you pop two things
off in the first half of the list, you've already lost and everything
after that is a waste.

The only time you want to do that is when you're memory-constrained, since
it will take less memory... and I gotta say, I don't think Python is the
best "memory-constrained" language in the world :-) Besides, if you're
really dealing with that much data, it's probably time to use a database
of some sort and tell *it* what things to eliminate.


From onurb at xiludom.gro  Tue Feb 15 13:52:31 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Tue, 15 Feb 2005 19:52:31 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cutem3$2t6$2@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr>
	<XX+64LRqnLECFwAV@objmedia.demon.co.uk>
	<cut6t9$sla$1@usenet.otenet.gr>
	<42123751$0$10042$626a14ce@news.free.fr>
	<cutem3$2t6$2@usenet.otenet.gr>
Message-ID: <421244f0$0$30339$636a15ce@news.free.fr>

Ilias Lazaridis wrote:
> bruno modulix wrote:
> 
>> Ilias Lazaridis wrote:
>>
>>>
>>> there are other reasons behind the decision to not support the MinGW 
>>> open-source-complier directly out of the main source-code base.
>>>
>> Yes, of course. The reason is they are lying about their commitment to 
>> open source. They are currently trying to port Python to .NET, and 
>> when done they'll retire the current implementation and lock everyone 
>> to a proprietary platform. I know it's hard to believe, but there are 
>> clues...
> 
> 
> impressive.
> 
> but things are much simpler.

Could you be more prolific ?

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for 
p in 'onurb at xiludom.gro'.split('@')])"


From danperl at rogers.com  Sun Feb  6 18:47:46 2005
From: danperl at rogers.com (Dan Perl)
Date: Sun, 6 Feb 2005 18:47:46 -0500
Subject: How to read POSTed data
References: <mailman.1980.1107622913.22381.python-list@python.org>
	<4205d419$0$6610$8fcfb975@news.wanadoo.fr>
	<lo2dnRzTVIzByZvfRVn-2Q@rogers.com>
	<42067a0d$0$10490$8fcfb975@news.wanadoo.fr>
Message-ID: <HcydnfD3to45MZvfRVn-iQ@rogers.com>


"Pierre Quentel" <quentel.pierre at wanadoo.fr> wrote in message 
news:42067a0d$0$10490$8fcfb975 at news.wanadoo.fr...
>
>> Pierre, I am repeating some questions I already stated in another thread, 
>> 'CGI POST problem', but do you have any opinions on how CGIHTTPServer's 
>> do_POST handles requests?  It looks to me like it always expects form 
>> data to be part of the POST command header, in the path of the URL, just 
>> like a GET request.  Am I understanding the code incorrectly?
>
> The code in CGIHTTPServer is not very easy to understand, but it does
> read the request body, as many bytes as indicated in the Content-Length
> header. See line 262 (in the Python 2.4 distribution) or 250 in Python 2.3 
> (this is the Windows version) :
>
>                 data = self.rfile.read(nbytes)
>
> Then this data is sent to the standard input of the CGI script. If this 
> script is a Python program using the cgi module, it usually creates a 
> cgi.FieldStorage() instance : upon creation, the standard input is read 
> (in self.read_urlencoded() for instance) and the string collected is 
> processed to produce a dictionary-like object, with keys matching the form 
> field names
>
> This is compliant with the CGI specification (HTTP doesn't say anything 
> about the management of data sent by POST requests). The code I sent is an 
> alternative to CGI, leaving the management of this data (available in 
> self.body) to a method of the RequestHandler instance

Thanks, Pierre, this got me much further but I hit another stumbling block. 
I can see now that CGIHTTPServer writes all the header lines into os.environ 
and creates a subprocess for the script with os.popen2 or os.popen3 (it's 
Windows), passing the form data to the new process through sys.stdin (I 
believe it is sys.stdin although the Library Reference descriptions of 
popen2 and popen3 say that would be sys.stdout).  But I don't see any of 
those headers updated in the os.environ of the cgi script's process.  Is the 
parent's os.environ passed to the subprocesses created with popen2/popen3 on 
Windows?

cgi.FieldStorage.read_urlencoded needs the content-length that should be 
passed through os.environ.

Dan 




From wangtianthu at gmail.com  Wed Feb  2 18:04:11 2005
From: wangtianthu at gmail.com (Tian)
Date: 2 Feb 2005 15:04:11 -0800
Subject: Question about pyFMOD importing
Message-ID: <39d7536d.0502021504.4a822c4b@posting.google.com>

I am trying to use pyFMOD, I have installed all other supporting
libraries (hopefully), such as ctypes, numarray, I also installed FMOD
itself and copied its DLL files to python/DLLs. When I try to import
pyFMOD in python, i got this message:

>>> import pyFMOD

Traceback (most recent call last):
  File "<pyshell#39>", line 1, in -toplevel-
    import pyFMOD
  File "C:\Python24\Lib\site-packages\pyFMOD.py", line 2, in
-toplevel-
    fmod = windll.fmod
  File "C:\Python24\Lib\site-packages\ctypes\__init__.py", line 346,
in __getattr__
    dll = self._dlltype(name)
  File "C:\Python24\Lib\site-packages\ctypes\__init__.py", line 283,
in __init__
    self._handle = _LoadLibrary(self._name)
WindowsError: [Errno 126] The specified module could not be found

Seems there are something wrong in ctype and its related DLL? How
should I install it right?

Another question, where can I find a tutorial of pyFMOD? the document
of FMOD itself is daunting and I don't know how exactly pyFMOD wraps
it.

Thanks!!

Tian


From xah at xahlee.org  Sat Feb 26 19:06:46 2005
From: xah at xahlee.org (Xah Lee)
Date: 26 Feb 2005 16:06:46 -0800
Subject: generic equivalence partition
In-Reply-To: <1109453893.313217.66290@f14g2000cwb.googlegroups.com>
References: <1109245733.261643.219420@f14g2000cwb.googlegroups.com>
	<1109419631.693212.236890@z14g2000cwz.googlegroups.com>
	<1109453893.313217.66290@f14g2000cwb.googlegroups.com>
Message-ID: <1109462806.608717.309810@o13g2000cwo.googlegroups.com>

People,

... sorry for the latching on on this broadside issue, but it is
impotant ...

here's are some germane points from another online discussion:

the bug-reporting issue has came up so many times by so many people i
thought i'd make a comment of my view.

when a software is ostensibly incorrect, and if it is likely in
connection to egregious irresponsibility as most software companies are
thru their irresponsible licensing, the thing one should not do is to
fawn up to their ass as in filing a bug report, and that is also the
least effective in correcting the software.

the common attitude of bug-reporting is one reason that contributed to
the tremendous egregious irresponsible fuckups in computer software
industry that each of us have to endure daily all the time. (e.g.
software A clashed, software B can't do this, C can't do that, D i
don't know how to use, E download location currently broken, F i need
to join discussion group to find a work-around, G is all pretty and
dysfunctional... )

when a software is ostensibly incorrect and when the company is
irresponsible with their licensing, the most effective and moral
attitude is to do legal harm to the legal entity. This one an do by
filing a law suit or spreading the fact. Filing a law suit is
appropriate in severe and serious cases, and provided you have such
devotion to the cause. For most cases, we should just spread the fact.
When a company see facts flying about their incompetence or
irresponsibility, they will immediately mend the problem source, or
cease to exist.

Another harm sprang from the fucking bug-reporting attitude rampant
among IT morons is the multiplication of pop-ups that bug users for
bug-reporting, complete with their privacy intrusion legalese.

http://xahlee.org/UnixResource_dir/writ/responsible_license.html

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html


Xah Lee wrote:
> folks:
>
> when using google to post a reply, it sometimes truncates the subject
> line. i.e. [perl-python] is lost. This software error is obvious,
they
> could not have not noticed it.
>
> another thing more egregious is that google _intentionally_ edit with
> people's posts. (e.g. they change email address lines without
author's
> permission, and they also change program codes so it no longer run).
> Please spread these google irresponsibility to all related forums on
> software responsibility and online forum issues.
>
> Ostensible incorrect behavior like these by google is egregious
enough
> to generate a law suit and if such company do not take software
> correctness seriously, we must punish them.
>
> Please spread this awareness.
> 
>  Xah
>  xah at xahlee.org
>  http://xahlee.org/PageTwo_dir/more.html



From fperez.net at gmail.com  Sun Feb  6 19:35:37 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Sun, 06 Feb 2005 17:35:37 -0700
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot> <opsln54fpwej1m1c@ashot>
	<36hculF51ho2sU1@individual.net>
	<1107530489.308497.103530@g14g2000cwa.googlegroups.com>
	<36hrjpF4ui8fbU1@individual.net>
	<mailman.1911.1107546744.22381.python-list@python.org>
	<36i84qF52ce29U1@individual.net> <opslo127s7ej1m1c@ashot>
	<cu0umf$cja$1@sea.gmane.org>
	<mailman.1936.1107561113.22381.python-list@python.org>
	<opslo7jfhqej1m1c@ashot> <36l1dgF52b9d6U1@individual.net>
	<4205605f_2@news.unc.edu> <42057751_1@news.unc.edu>
	<36n1gfF505tarU1@individual.net> <36nog9F4udan0U1@individual.net>
Message-ID: <cu6d2t$sml$1@sea.gmane.org>

Claudio Grondi wrote:

> Hi,
> 
> I have just updated previously announced
> and uploaded to
>  http://people.freenet.de/AiTI-IT/Python/Console.py
> version
> of Console.py because I was not satisfied with
> it (it didn't support arbitrary ANSI escape
> sequences for setting text colors ...)

I'd suggest you post some of this info, once you hash out the details with Gary,
to the ipython-users list.  I'm sure others there would appreciate your efforts
towards enhancing the functionality available to win32 users.

Best,

f



From michele.simionato at gmail.com  Mon Feb 21 00:51:35 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 20 Feb 2005 21:51:35 -0800
Subject: questions concerning cgi.FieldStorage(keep_blank_values=1)
In-Reply-To: <mailman.2865.1108917022.22381.python-list@python.org>
References: <mailman.2865.1108917022.22381.python-list@python.org>
Message-ID: <1108965095.438688.46170@f14g2000cwb.googlegroups.com>

Jonas:
> in this application, i need keys to be delivered with the url, some
with
> and some without value (for example 'script.py?key1&key2=foo'.

You are missing an "=" sign after key1. Confront with this example:

from cgi import parse_qsl

QS = "x=1&y=2&x=3&z=&y=4"
print parse_qsl(QS)
print parse_qsl(QS, keep_blank_values=True)

which gives

[('x', '1'), ('y', '2'), ('x', '3'), ('y', '4')]
[('x', '1'), ('y', '2'), ('x', '3'), ('z', ''), ('y', '4')]

Here the blank value "z=" is converted into "z=''".


                   Michele Simionato



From ncoghlan at iinet.net.au  Sat Feb 12 03:21:58 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 12 Feb 2005 18:21:58 +1000
Subject: namespaces module (a.k.a. bunch, struct, generic object, etc.)
 PEP
In-Reply-To: <420DB64E.9020000@iinet.net.au>
References: <GaudndOHLML3M5bfRVn-vg@comcast.com>	<mailman.2383.1108124347.22381.python-list@python.org>	<LvSdnbe2vZhv2ZDfRVn-tQ@comcast.com>	<mailman.2436.1108183031.22381.python-list@python.org>	<fcadnXgIes3QBJDfRVn-uA@comcast.com>
	<420DB64E.9020000@iinet.net.au>
Message-ID: <420DBCA6.5040208@iinet.net.au>

Nick Coghlan wrote:
> Py> class NS(namespaces.Namespace):
> ...   x = prop
> ...

Oops - c&p error here. This was actually:

Py> class NS(namespaces.Namespace):
...   x = prop
...   __x__ = prop
...

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From adam at cognitcorp.com  Tue Feb 15 20:07:56 2005
From: adam at cognitcorp.com (Adam DePrince)
Date: Tue, 15 Feb 2005 20:07:56 -0500
Subject: newbie question convert C to python
In-Reply-To: <3P6dnYqXu9GngI_fRVn-2g@comcast.com>
References: <1108440952.526232.234130@c13g2000cwb.googlegroups.com>
	<7xr7jixxdm.fsf@ruckus.brouhaha.com>
	<3P6dnYqXu9GngI_fRVn-2g@comcast.com>
Message-ID: <1108516076.4371.23.camel@localhost.localdomain>

On Tue, 2005-02-15 at 11:03, Steven Bethard wrote:
> Paul Rubin wrote:
> > doodle4 at gmail.com writes:
> > 
> >>How do i handle this piece of code in python:
> >>
> >># define vZero 15
> >># define vOne  20
> >>
> >>unsigned int vTable[Zero][One]
> >>
> >>if(vGroup[vZero][vOne] == 0)
> >>    {
> >>         vGroup[vZero][vOne]--
> >>         .....
> >>         .....
> >>    }
> > 
> > Simplest might be with a dictionary:
> > 
> > vGroup = {}    # I assume you meant vGroup not vTable
> > if vGroup[(vZero, vOne)] == 0:
> >    vGroup[(vZero, vOne)] -= 1
> >    .....
> >    .....
> 
> Or, if you like, the parentheses are unnecessary:
> 
> vGroup = {}
> if vGroup[vZero, vOne] == 0:
>     vGroup[vZero, vOne] -= 1
>     .....
> 
> This (or the semantically identical version with parentheses) is 
> definitely the best approach if you expect to have a lot of empty spots 
> in your table.
> 
> STeVe

One of the problems I see is the access of uninitialized values.  In C,
you *can* read these and it isn't a bad idea if you used memset, calloc
or friends.  If I know for sure this will be sparse, I'd reproduce it in
python like this.

vTable = []
for x in xrange( vZero ):
	vTable.append( [0,] * vOne )

Now you have a vZero x vOne "array" of zeros.  Treat it as you would
such a creature in C ... 

vTable[0][0] = 1
or whatever you want to do. 

I've seen this question before.  Lot in the archives for the subject "2D
array" from Dec 7th 2004 - Dec 10th 2004.

Steven and I recommended roughly opposite solutions at the time :-)

Adam DePrince 



From ncoghlan at iinet.net.au  Sun Feb 13 00:23:03 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 13 Feb 2005 15:23:03 +1000
Subject: Kill GIL
In-Reply-To: <868y5t6sal.fsf@guru.mired.org>
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>	<1107964587.818199.223980@g14g2000cwa.googlegroups.com>	<mailman.2254.1107966236.22381.python-list@python.org>	<7xr7jlwieq.fsf@ruckus.brouhaha.com>
	<cum62t$3fb$1@panix2.panix.com>	<mailman.2463.1108256227.22381.python-list@python.org>
	<868y5t6sal.fsf@guru.mired.org>
Message-ID: <420EE437.5030009@iinet.net.au>

Mike Meyer wrote:
> Jack Diederich <jack at performancedrivers.com> writes:
> 
> 
>>From reading this
>>thread every couple months on c.l.py for the last few years it is my 
>>opinion that the number of people who think threading is the only solution
>>to their problem greatly outnumber the number of people who actually have 
>>such a problem (like, nearly all of them).
> 
> 
> Here here. I find that threading typically introduces worse problems
> than it purports to solve.

In my experience, threads should mainly be used if you need asynchronous access 
to a synchronous operation. You spawn the thread to make the call, it blocks on 
the relevant API, then notifies the main thread when it's done.

Since any sane code will release the GIL before making the blocking call, this 
scales to multiple CPU's just fine.

Another justification for threads is when you have a multi-CPU machine, and a 
processor intensive operation you'd like to farm off to a separate CPU. In that 
case, you can treat the long-running operation like any other synchronous call, 
and farm off a thread that releases the GIL before start the time-consuming 
operation.

The only time the GIL "gets in the way" is if the long-running operation you 
want to farm off is itself implemented in Python.

However, consider this: threads run on a CPU, so if you want to run multiple 
threads concurrently, you either need multiple CPU's or a time-slicing scheduler 
that fakes it.

Here's the trick: PYTHON THREADS DO NOT RUN DIRECTLY ON THE CPU. Instead, they 
run on a Python Virtual Machine (or the JVM/CLR Runtime/whatever), which then 
runs on the CPU. So, if you want to run multiple Python threads concurrently, 
you need multiple PVM's or a timeslicing scheduler. The GIL represents the latter.

Now, Python *could* try to provide the ability to have multiple virtual machines 
in a single process in order to more effectively exploit multiple CPU's. I have 
no idea if Java or the CLR work that way - my guess it that they do (or 
something that looks the same from a programmer's POV). But then, they have 
Sun/Microsoft directly financing the development teams.

A much simpler suggestion is that if you want a new PVM, just create a new OS 
process to run another copy of the Python interpreter. The effectiveness of your 
multi-CPU utilisation will then be governed by your OS's ability to correctly 
schedule multiple processes rather than by the PVM's ability to fake multiple 
processes using threads (Hint: the former is likely to be much better than the 
latter).

Additionally, schemes for inter-process communication are often far more 
scaleable than those for inter-thread communication, since the former generally 
can't rely on shared memory (although good versions may utilise it for 
optimisation purposes). This means they can usually be applied to clustered 
computing rather effectively.

I would *far* prefer to see effort expended on making the idiom mentioned in the 
last couple of paragraphs simple and easy to use, rather than on a misguided 
effort to "Kill the GIL".

Cheers,
Nick.

P.S. If the GIL *really* bothers you, check out Stackless Python. As I 
understand it, it does its best to avoid the C stack (and hence threads) altogether.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From raghulj at gmail.com  Mon Feb 21 23:56:13 2005
From: raghulj at gmail.com (Raghul)
Date: 21 Feb 2005 20:56:13 -0800
Subject: copying or moving the mail message using imaplib
In-Reply-To: <421ab853$0$44647$a1866201@visi.com>
References: <1109044151.869953.187270@c13g2000cwb.googlegroups.com>
	<mailman.2918.1109045457.22381.python-list@python.org>
	<1109046578.692118.24350@l41g2000cwc.googlegroups.com>
	<421ab853$0$44647$a1866201@visi.com>
Message-ID: <1109048173.384888.79560@o13g2000cwo.googlegroups.com>

Thanx I got some clear view about this. In the above program I used uid
method to copy thje mail to "Inbox".This shows the out put of my mail
messages and In the copy of messages I got the output
when printing the "dat"

('OK', [None])
('OK', ['2 (UID 16 FLAGS (\\Seen))'])
2

I cannot see the message in the INBOX. Can anyone give me a solution.



From JoshuaACohen at gmail.com  Wed Feb 16 11:44:01 2005
From: JoshuaACohen at gmail.com (Josh)
Date: 16 Feb 2005 08:44:01 -0800
Subject: Win32api shellexecute Bshow
Message-ID: <1108572241.817012.219940@z14g2000cwz.googlegroups.com>

Hi All,

I am trying to print a pdf file from python using the Win32api
shellexecute method and am having a problem, or perhaps just a
misunderstanding, with the bshow parameter. Am I correct to assume that
if the bshow parm is set to 0, that the program will not show when
launched? e.g.:

win32api.ShellExecute (0, "print", "test.pdf", None, ".", 0)

When this statment is executed, Adobe Acrobat is launched and made
visible to the user, however the actual PDF is hidden. I do not wish
for Acrobat to be seen either. 

Any thoughts? 

Thanks

Josh



From pobrien at orbtech.com  Mon Feb 14 15:36:16 2005
From: pobrien at orbtech.com (Pat)
Date: 14 Feb 2005 12:36:16 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2562.1108412196.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108411017.507814.229600@c13g2000cwb.googlegroups.com>
	<mailman.2562.1108412196.22381.python-list@python.org>
Message-ID: <1108413376.110181.240600@o13g2000cwo.googlegroups.com>


Fredrik Lundh wrote:
> "Pat" wrote:
>
> > Okay, I think we are pretty much talking about the same thing.  My
> > problem is not that I'm unable or unwilling to purchase a good
> > compiler.  My problem is that I don't want to make it a requirement
of
> > my users.  The twist is that my users will be working out of a
> > Subversion repository that includes source code for extensions
written
> > in C.  Those extensions need to be compiled, and the code changes
too
> > frequently for me to want to deal with supplying compiled binaries.
>
> here's what I do to supply compiled binaries for 2.1 through 2.4:
>
>     > mkall
>     > upload dist
>
> > So I'm looking for options for Windows users who do not have, and
are
> > unwilling to get, a Microsoft compiler.  For some users, minGW is
an
> > attractive option.  For those who want to use minGW, I'm trying to
> > establish whether or not minGW is a viable option, particularly for
> > Python 2.4.
>
> here's what I just did (time in minutes):
>
>     +00: googled for the mingw home page
>     +00: found the mingw download page
>     +02: finally figured out what to download
>     +03: noticed that my usual SF site only offered 1K/s; aborted
download
>     +07: finished downloading the mingw kit from another SF site
>     +17: finished installing
>     +18: added \mingw\bin to the path
>     +18: typed "python setup.py install --compiler=mingw32"
>     +18: got a linker error; googled for help
>     +19: copied python24.dll to \mingw\lib
>     +20: finished building the sample library (cElementTree); all
tests pass
>
> so what's your excuse for not doing this? ;-)

A few things.  Primarily the fact that I'm not very experienced in C
(the extensions that I need to have compiled are not written by me).
Secondarily, the fact that the discussion threads I read made it seem
much more complicated than what you just described.  Third, the fact
that some of the code we've tried to compile didn't compile cleanly,
the way your cElementTree did (but I can't remember what exactly the
problem was and I didn't do the compiling).  And, finally, an aversion
to trial-and-error solutions.  I prefer to Google and ask questions
when I'm out of my element.

Thanks for the info.

--
Patrick K. O'Brien
Orbtech    http://www.orbtech.com
Schevo     http://www.schevo.org
Pypersyst  http://www.pypersyst.org



From sjmachin at lexicon.net  Tue Feb 22 05:54:48 2005
From: sjmachin at lexicon.net (John Machin)
Date: 22 Feb 2005 02:54:48 -0800
Subject: how can I make this script shorter?
In-Reply-To: <cveqr1$a47$1@mughi.cs.ubc.ca>
References: <cveqr1$a47$1@mughi.cs.ubc.ca>
Message-ID: <1109069688.328226.89190@g14g2000cwa.googlegroups.com>


Lowell Kirsh wrote:
> I have a script which I use to find all duplicates of files within a
> given directory and all its subdirectories. It seems like it's longer

> than it needs to be but I can't figure out how to shorten it. Perhaps

> there are some python features or libraries I'm not taking advantage
of.
>
> The way it works is that it puts references to all the files in a
> dictionary with file size being the key. The dictionary can hold
> multiple values per key. Then it looks at each key and all the
> associated files (which are the same size). Then it uses filecmp to
see
> if they are actually byte-for-byte copies.
>
> It's not 100% complete but it's pretty close.
>
> Lowell

To answer the question in the message subject: 1,$d

And that's not just the completely po-faced literal answer that the
question was begging for: why write something when it's already been
done? Try searching this newsgroup; there was a discussion on this very
topic only a week ago, during which the effbot provided the URL of an
existing python file duplicate detector. There seems to be a discussion
every so often ...

However if you persist in DIY, read the discussions in this newsgroup,
search the net (people have implemented this functionality in other
languages); think about some general principles -- like should you use
a hash (e.g. SHA-n where n is a suitably large number). If there are N
files all of the same size, you have two options (a) do O(N**2) file
comparisons or (b) do N hash calcs followed by O(N**2) hash
comparisons; then deciding on your
need/whim/costs-of-false-negatives/positives you can stop there or you
can do the file comparisons on the ones which match on hashes. You do
however need to consider that calculating the hash involves reading the
whole file, whereas comparing two files can stop when a difference is
detected. Also, do you understand and are you happy with using the
(default) "shallow" option of filecmp.cmp()?



From mike at teczno.com  Mon Feb 21 01:51:31 2005
From: mike at teczno.com (Michal Migurski)
Date: Sun, 20 Feb 2005 22:51:31 -0800
Subject: Moving to Python from PHP - 3 questions
In-Reply-To: <42191783.2000608@joefrancia.com>
References: <mailman.2873.1108931203.22381.python-list@python.org>	<cvat62$9h0$05$1@news.t-online.com>
	<f2582bbd378120970423d611a09d2789@teczno.com>
	<42191783.2000608@joefrancia.com>
Message-ID: <f749a626198413fad98734a70daa4b7f@teczno.com>

>> Thank you. My impression of Zope in the past has been that it does 
>> what I need, along with 10,000 other things I don't (built in WebDAV 
>> server?!), but clearly I owe it another chance. I've been initially 
>> attracted to mod_python because of its raw simplicity and its 
>> apparent similarity to mod_php and mod_perl, which I am familiar 
>> with. I'll give Zope a try.
>
> I am moving my band's website from an antiquated and horrible PHPNuke 
> site to a Python-based site, and so have done quite a bit of research 
> about this (though I never considered myself a PHP expert).  Here's 
> what I've come up with...
[snip]

This is awesome, quote a bit to chew on. Thank you Joe!

------------------------------------------------------
michal migurski- contact info, blog, and pgp key:
sf/ca            http://mike.teczno.com/contact.html



From jeff at ccvcorp.com  Thu Feb 10 13:11:28 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Thu, 10 Feb 2005 10:11:28 -0800
Subject: how can I replace a execfile with __import__ in class to use
 self variables
In-Reply-To: <1108006620.737336.166370@o13g2000cwo.googlegroups.com>
References: <1107998777.476599.7890@o13g2000cwo.googlegroups.com>
	<1108006620.737336.166370@o13g2000cwo.googlegroups.com>
Message-ID: <110n8s311uf5ka9@corp.supernews.com>

Wensheng wrote:

> I just realized I can pass the object itself:
> like
> p=__import__("printit")
> p.pr(self)

Leaving no reason not do do *this* part as

     import printit
     printit.pr(self)

rather than using the internal hook function to do exactly the 
standard thing.

> in printit.py
> -------------
> def pr(self):
>     print self.var
> -------------------


(Though frankly I don't see the advantage of having this tiny function 
in a separate file to begin with...)

Jeff Shannon
Technician/Programmer
Credit International



From x at y.z  Tue Feb 15 11:45:31 2005
From: x at y.z (D H)
Date: Tue, 15 Feb 2005 10:45:31 -0600
Subject: replacing ASP/VBScript with Python
In-Reply-To: <cusv5l$4hl$1@swifty.westend.com>
References: <cusnon$qhd$1@swifty.westend.com> <cusv5l$4hl$1@swifty.westend.com>
Message-ID: <zpSdnZSFe7Wyuo_fRVn-2g@comcast.com>

Peter Maas wrote:
> Peter Maas schrieb:
> 
>> I have inherited an extremely messy ASP/VBScript application which
>> is a pain for me to support. Now the customer is thinking about a
>> redesign. I'd like to rewrite the whole thing in Python but the app
>> has to meet some conditions like
>>
>> - IIS frontend
>> - MSSQL db server
>> - Win32 authentication
>> - No 'ugly' URLs like http://server/cgi-bin/frontend.cgi?main.py
>> - Performance: intranet with ~ 1000 users
> 
> 
> In the meantime I have searched the internet and found plenty of options:
> 
> - plain cgi with fastcgi and mod_rewrite for IIS to transform the URL
> - quixote cgi with fastcgi and mod_rewrite
> - Webware + wkcgi
> - Python ASP (registering Python with Pywin32 as ASP language)
> - mxODBC + SQL ODBC driver
> - pyADO + SQL MDAC driver
> 

Can those do Windows authentication though?  I guess you could with 
Python ASP.  If you really are stuck with ASP/IIS/Windows, then you 
might find using boo or ironpython easier since they work with .NET. 
I'm just saying it is an option, not that you shouldn't use CPython.

 > - I'd like to do session handling in Python because ASP's session
 >   object is quite limited and some of the ASP app's mess is caused
 >   by trying to use it for compound data type storage. OTOH I could
 >   pickle Python objects to a string and store that in an ASP session.

For storing complex data objects, instead of pickle, you can either use 
.NET serialization: http://boo.codehaus.org/XML+Serialization
or db4objects, a GPL tool: http://www.db4o.com/
There is a sample of using boo with db4o here: 
http://db4oboobrowser.sourceforge.net/
Or ORMs like Gentle.NET can work with MSSQL:
http://www.mertner.com/confluence/display/Gentle/Home


From gene.tani at gmail.com  Wed Feb 16 22:31:32 2005
From: gene.tani at gmail.com (gene.tani at gmail.com)
Date: 16 Feb 2005 19:31:32 -0800
Subject: [perl-python] problem: reducing comparison
In-Reply-To: <cuvc0l$45v$1@gemini.csx.cam.ac.uk>
References: <1108450348.253772.158120@z14g2000cwz.googlegroups.com>
	<cuvc0l$45v$1@gemini.csx.cam.ac.uk>
Message-ID: <1108611092.143351.216130@o13g2000cwo.googlegroups.com>

This could have been a really unique thread: 15 messages, 1 author



From dima at trit.invalid  Mon Feb 28 16:29:19 2005
From: dima at trit.invalid (Dima Dorfman)
Date: 28 Feb 2005 21:29:19 GMT
Subject: Why do descriptors (and thus properties) only work on
	attributes.
References: <slrnd25nve.d87.apardon@rcpc42.vub.ac.be>
	<7xoee5kpiv.fsf@ruckus.brouhaha.com>
	<slrnd25pj4.d87.apardon@rcpc42.vub.ac.be>
	<38g8hvF5oc44qU1@individual.net>
	<slrnd25ric.d87.apardon@rcpc42.vub.ac.be>
Message-ID: <slrnd2739f.2i8s.dima@beaver.trit.org>

On 2005-02-28, Antoon Pardon <apardon at forel.vub.ac.be> wrote:
> Op 2005-02-28, Diez B. Roggisch schreef <deetsNOSPAM at web.de>:
>> I still don't see how that is supposed to work for "a lot of interesting
>> things". Can you provide examples for one of these interesting things?
>
> Lazy evaluation where the value of something is calculated the first
> time it is needed but accessed from some storage if it is needed again.

I do this all the time. It's not very hard and doesn't require any
extra language support, but I would like for there to be an
authoritative list of type slots (autopromise_ops).

    import operator

    def promise(thunk):
        x = []
        def promised():
            if not x:
                x.append(thunk())
            return x[0]
        return promised

    autopromise_ops = [x for x in dir(operator) if x.startswith('__')]
    autopromise_ops += ['__getattribute__', '__call__', '__str__', '__repr__']
    autopromise_ops += ['__getattr__', '__setattr__', '__delattr__']

    def autopromise(thunk):
        p = promise(thunk)
        d = {}
        for op in autopromise_ops:
            def bindhack(op=op):
                return lambda self, *a, **kw: getattr(p(), op)(*a, **kw)
            d[op] = bindhack()
        return type('autopromise', (), d)()

    def test():

        lis = []

        def thunk():
            lis.append('ran thunk')
            return 'value'

        s = autopromise(thunk)
        p = s * 30
        assert p == 'value' * 30
        p = s * 10
        assert p == 'value' * 10
        assert lis == ['ran thunk']          # Just once

        print 'autopromise sanity test passed'

An autopromise object is good almost everywhere the real one would be,
and usually the only way to tell the difference is to call id or type
on it. The main exception is when the thunk returns a builtin type
(like a string or int) and you want to pass it to a builtin function
that expects a particular type (this would also apply to Python
functions that break duck typing on purpose, but those would just be
getting the breakage they deserve).


From cpmcdaniel at gmail.com  Wed Feb 16 16:43:42 2005
From: cpmcdaniel at gmail.com (cpmcdaniel at gmail.com)
Date: 16 Feb 2005 13:43:42 -0800
Subject: Using 'in' with a Dict
Message-ID: <1108590222.589358.7310@o13g2000cwo.googlegroups.com>

I was wondering if the following two "if" statements compile down to
the same bytecode for a standard Dictionary type:

m = {"foo": 1, "blah": 2}

if "foo" in m:
  print "sweet"

if m.has_key("foo"):
  print "dude"



From marian at mba-software.de  Mon Feb  7 00:24:52 2005
From: marian at mba-software.de (=?ISO-8859-1?Q?Marian_Aldenh=F6vel?=)
Date: Mon, 07 Feb 2005 06:24:52 +0100
Subject: pygame.mixer.music not playing
In-Reply-To: <1107748705.808825.319270@f14g2000cwb.googlegroups.com>
References: <36mb0iF54udklU1@individual.net>
	<1107700800.258876.298010@z14g2000cwz.googlegroups.com>
	<36mvjkF54gvnrU1@individual.net>
	<1107748705.808825.319270@f14g2000cwb.googlegroups.com>
Message-ID: <36ocddF541n0fU1@individual.net>

Hi,

> Also you can try and look for another sound package, like maybe pyFMOD

I have looked at it. While I do not like some of the boasting on the FMOD
site it does seem very suitable.

FMOD is cross-platform but pyFMOD is available only as Win32-Setup. Does
that mean it cannot be made to work on Linux or is it just not packaged
for it? It looks like your standard DLL-Import-File as known from other
languages and uses ctypes (had to install that first). How hard can it be
to make a version that loads a shared library with the same API on Linux?

To make pyFMOD work with the current version of FMOD I had to fix it in a
few obvious places. After doing so the new version of my micro-program
looks like this:

	import time
	from pyFMOD import *

	res = FSOUND_Init(44100, 32, 0)
	print "FSOUND_Init() =", res

	stream = FSOUND_Stream_Open("file1.mp3",0,0,0)
	print "FSOUND_Stream_Open() =", stream

	res = FSOUND_Stream_Play(FSOUND_FREE,stream)
	print "FSOUND_Stream_Play() =", res

	while True:
		print "FSOUND_Stream_GetTime() =", FSOUND_Stream_GetTime(stream)
		time.sleep(1)

And plays fine. Now I need to read up on FMODs API to find out how to
eliminate the "while True;" but that should not be a problem. This would give
me a very rich API with full control.

I am having fun! Thank you all.

Ciao, MM
-- 
Marian Aldenh?vel, Rosenhain 23, 53123 Bonn. +49 228 624013.
http://www.marian-aldenhoevel.de
"Wir brauchen keine Opposition, wir sind bereits Demokraten."


From invalidemail at aerojockey.com  Sun Feb 27 14:22:23 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 27 Feb 2005 11:22:23 -0800
Subject: any Python equivalent of Math::Polynomial::Solve?
In-Reply-To: <1109485184.587035.176540@l41g2000cwc.googlegroups.com>
References: <just-420C1F.16423926022005@news1.news.xs4all.nl>
	<1109485184.587035.176540@l41g2000cwc.googlegroups.com>
Message-ID: <1109532143.591685.319010@f14g2000cwb.googlegroups.com>


Carl Banks wrote:
> . from Numeric import *
> . from LinearAlgebra import *
> .
> . def quinticroots(p):
> .     cm = zeros((5,5),Float32)
> .     cm[0,1] = cm[1,2] = cm[2,3] = cm[3,4] = 1.0
> .     cm[4,0] = -p[0]
> .     cm[4,1] = -p[1]
> .     cm[4,2] = -p[2]
> .     cm[4,3] = -p[3]
> .     cm[4,4] = -p[4]
> .     return eigenvalues(cm)


Here's an improved version.  It uses 64-bit numbers (I had used type
Float32 because I often use a float32 type at work, not in Python,
unfortunately), and array assignment.

. def quinticroots(p):
.     cm = zeros((5,5),Float)
.     cm[0,1] = cm[1,2] = cm[2,3] = cm[3,4] = 1.0
.     cm[4,:] = -array(p)
.     return eigenvalues(cm)


-- 
CARL BANKS



From markus_wankusGETRIDOFALLCAPS at hotmail.com  Thu Feb  3 22:50:09 2005
From: markus_wankusGETRIDOFALLCAPS at hotmail.com (Markus Wankus)
Date: Thu, 03 Feb 2005 22:50:09 -0500
Subject: IDLE history, Python IDE, and Interactive Python with Vim
In-Reply-To: <opsllommgvb1cml1@ashot>
References: <opsllommgvb1cml1@ashot>
Message-ID: <_hCMd.22184$Ck1.1630530@news20.bellglobal.com>

I highly recommend trying pyDev.  0.9 just came out, and I find 0.85 
very usable and quite cool.  There is nice debug support, and 
context-sensitive code completion as well as real-time validation of 
your code.  This is an exciting project with a bright future in my opinion.

Markus.


Ashot wrote:

> This is sort of both Python and Vim related (which is why I've posted 
> to  both newsgroups).
> 
> Python related:
> ----------------------
> I have been frustrated for quite some time with a lack of a history  
> command in IDLE (in fact with IDLE in general).  Often I'll develop new  
> code at the command line, testing each line as I go.  Currently I have 
> to  copy and paste, removing outputs and the ">>>" at each line.
> Is it perhaps possible to make some kind of hack to do this (dump a  
> command history)?
> 
> Idle in general isn't that great IMO, so I was wondering also if there 
> are  better alternatives out there?  What do people use mostly?  I've 
> tried  something called pyCrust, but this too didn't have history and 
> some other  things I was looking for.  On a more general note, although 
> the agility  and simplicity of Python make programming tools like an IDE 
> less  necessary, it still seems that Python is lacking in this 
> departement.  The  PyDev plug-in for Eclipse seems like good step in 
> this direction, although  I haven't tried it yet.  Does anyone have any 
> experience with this, or  perhaps can point me to other tools.
> 
> Vim related:
> ----------------------
> Ideally, it would be nice to have a command mapped to a keystroke that 
> can  append the last executed command to a file.  Even better would be a 
> system  that would integrate the file editing and interactive command 
> line tool  more seamlessly.  Something along the lines of a debugger + 
> file editor  + command line utility, where file editor = vim.  I know 
> that vim has a  utility for running python commands from its command 
> prompt, but I have  had a hard time getting this to work in windows and 
> haven't explored it.   Has anyone seen/tried a system along these lines, 
> perhaps incorporating  the python debugger (pdb)?  I can see something 
> that will run the file you  are editing in vim up to the cursor or a 
> mark with a set_trace at the line  you are editing.
> 
> 
> Any info is appreciated, thanks.
> 
> -- 
> Ashot Petrosian
> University of Texas at Austin, Computer Sciences


From rzantow at ntelos.net  Mon Feb 21 11:03:34 2005
From: rzantow at ntelos.net (rzed)
Date: Mon, 21 Feb 2005 11:03:34 -0500
Subject: help please
References: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
	<TPKdnU2eEu9xPJPfRVn-vg@comcast.com>
	<1108260752.791847.180060@l41g2000cwc.googlegroups.com>
	<Z4ydnbKMDLVvEJLfRVn-hA@comcast.com>
	<1108324679.451793.147890@z14g2000cwz.googlegroups.com>
	<i_ydnb41nJ68IZLfRVn-gw@comcast.com>
	<1108329540.239064.144920@f14g2000cwb.googlegroups.com>
	<j7udnc1ZGqsAUZLfRVn-3w@comcast.com>
	<1108334012.336816.221460@g14g2000cwa.googlegroups.com>
	<joSdnbH-qqzBZpLfRVn-tg@comcast.com>
	<1108921146.274248.11500@g14g2000cwa.googlegroups.com>
	<hbydnV4bvrCxcIXfRVn-1w@comcast.com>
	<1108959170.585091.202240@z14g2000cwz.googlegroups.com>
Message-ID: <732f6$421a051a$40046a98$4613@ispnews.usenetserver.com>


"gargonx" <gargonx at gmail.com> wrote in message
news:1108959170.585091.202240 at z14g2000cwz.googlegroups.com...
> Even if i put it in exactly the way you did:
>
> >>> import re
> >>> charmatcher = re.compile(r' [A-Z] [\d]?')
> >>>
> >>> ext = dict(D="V1", O="M1", G="S1")
> >>> std = dict(S="H")
> >>>
> >>> decode_replacements ={}
> >>> decode_replacements.update([(std[key], key) for key in std])
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AttributeError: keys


Works with 2.4, but not with 2.3.4:

Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import re
>>> charmatcher = re.compile(r' [A-Z] [\d]?')
>>>
>>> ext = dict(D="V1", O="M1", G="S1")
>>> std = dict(S="H")
>>>
>>> decode_replacements ={}
>>> decode_replacements.update([(std[key], key) for key in std])
>>>
>>> print decode_replacements
{'H': 'S'}



Python 2.3.4 (#53, May 25 2004, 21:17:02) [MSC v.1200 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import re
>>> charmatcher = re.compile(r' [A-Z] [\d]?')
>>>
>>> ext = dict(D="V1", O="M1", G="S1")
>>> std = dict(S="H")
>>>
>>> decode_replacements ={}
>>> decode_replacements.update([(std[key], key) for key in std])
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: keys
>>>
>>> print decode_replacements
{}






From steven.bethard at gmail.com  Wed Feb  2 23:28:31 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 02 Feb 2005 21:28:31 -0700
Subject: streaming a file object through re.finditer
In-Reply-To: <1107396145.400036.271010@g14g2000cwa.googlegroups.com>
References: <1107396145.400036.271010@g14g2000cwa.googlegroups.com>
Message-ID: <SJmdndZykYrzNZzfRVn-hA@comcast.com>

Erick wrote:
> Hello,
> 
> I've been looking for a while for an answer, but so far I haven't been
> able to turn anything up yet. Basically, what I'd like to do is to use
> re.finditer to search a large file (or a file stream), but I haven't
> figured out how to get finditer to work without loading the entire file
> into memory, or just reading one line at a time (or more complicated
> buffering).

Can you use mmap?

http://docs.python.org/lib/module-mmap.html

"You can use mmap objects in most places where strings are expected; for 
example, you can use the re module to search through a memory-mapped file."

Seems applicable, and it should keep your memory use down, but I'm not 
very experienced with it...

Steve


From apardon at forel.vub.ac.be  Mon Feb  7 08:28:04 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 7 Feb 2005 13:28:04 GMT
Subject: variable declaration
References: <1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
	<roy-214B3A.08312205022005@reader2.panix.com>
Message-ID: <slrnd0er73.26q.apardon@rcpc42.vub.ac.be>

Op 2005-02-05, Roy Smith schreef <roy at panix.com>:
> In article <MSGID_2=3A5025=2F3.131_4204c40a at fidonet.org>,
>  Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org (Alexander 
>  Zatvornitskiy) wrote:
>
>> And, one more question: do you think code like this:
>> 
>> var S=0
>> var eps
>> 
>> for eps in xrange(10):
>>   S=S+ups
>> 
>> is very bad? Please explain your answer:)
>
> Let me answer that by way of counter-example.
>
> Yesterday I was writing a little perl script.  I always use "use strict" in 
> perl, which forces me to declare my variables.  Unfortunately, my code was 
> giving me the wrong answer, even though the interpreter wasn't giving me 
> any error messages.
>
> After a while of head-scratching, it turned out that I had written "$sum{x} 
> += $y" instead of "$sum{$x} += $y".  The need to declare variables didn't 
> find the problem.  I *still* needed to test my work.  Given that I needed 
> to write tests anyway, the crutch of having to declare my variables really 
> didn't do me any good.

I you come to the conclusion that it doesn't do you any good, why did
you use it? I find it odd that someone who prefers to use it in a
language where it is optional is argues that it shouldn't be included
as an option is an other language. I would think that if he thinks
it so bad he wouldn't use it in that other language in the first place.

-- 
Antoon Pardon


From 18k11tm001 at sneakemail.com  Fri Feb 11 18:18:57 2005
From: 18k11tm001 at sneakemail.com (18k11tm001 at sneakemail.com)
Date: 11 Feb 2005 15:18:57 -0800
Subject: Commerical graphing packages?
In-Reply-To: <420d1595$1@nntp.zianet.com>
References: <420d1595$1@nntp.zianet.com>
Message-ID: <1108163937.533683.162220@g14g2000cwa.googlegroups.com>

Check out GRACE. It's not specifically designed for Python, but I've
been using with Python for a couple of years or more. I'm very happy
with it, and it's free. It works both interactively and in batch mode.
Do a google on GRACE.



From steve at holdenweb.com  Thu Feb  3 09:58:42 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 03 Feb 2005 09:58:42 -0500
Subject: Popularizing SimpleHTTPServer and CGIHTTPServer
In-Reply-To: <Xns95F25F64B1D31devnulljoreybumpcom@199.45.49.11>
References: <1107412654.121488.157070@c13g2000cwb.googlegroups.com>
	<Xns95F25F64B1D31devnulljoreybumpcom@199.45.49.11>
Message-ID: <M3rMd.102695$Jk5.42494@lakeread01>

Jorey Bump wrote:

> "Michele Simionato" <michele.simionato at gmail.com> wrote in 
> news:1107412654.121488.157070 at c13g2000cwb.googlegroups.com:
> 
> 
>>Just submitted a recipe with this goal in mind:
>>
>>http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/365606
> 
> 
> You may want to warn people that if they run those commands in their home 
> directory, they will instantly share all of their data with anyone that can 
> access the machine. Because the server runs as the user, it will have 
> permission to serve all of the files in the directory. I'd recommend that 
> they cd into a directory created specifically for the purpose of testing.
> 
> Does anyone know how to use SimpleHTTPServer to:
> 
> 1. Support virtual hosts?
> 
> 2. Support SSL?
> 
> I'd like to use SimpleHTTPServer to create some simple reporting utilities, 
> but can't get past these two points. Is there a NotSoSimpleHTTPServer?

You want ExtremelyBloodyComplicatedHTTPServer :-)

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From service at zp-solutions.com  Tue Feb  1 07:03:31 2005
From: service at zp-solutions.com (Nico Grubert)
Date: Tue, 01 Feb 2005 13:03:31 +0100
Subject: Remove HTML tags (except anchor tag) from a string using regular
 expressions
Message-ID: <41FF7013.7030309@zp-solutions.com>

Hello,

I want to remove all html tags from a string "content" except <a 
...>xxx</a>.

My script reads like this:

###
import re
content = re.sub('<([^!>]([^>]|\n)*)>', '', content)
###

It works fine. It removes all html tags from "content".
Unfortunately, this also removes  <a ...>xxx</a> occurancies.
Any idea, how to modify this to remove all html tags except <a ...>xxx</a>?

Thanks in advance,
Nico


From brown at esteem.com  Fri Feb  4 21:54:52 2005
From: brown at esteem.com (Tom Brown)
Date: Fri, 4 Feb 2005 18:54:52 -0800
Subject: how to send an int over a socket
In-Reply-To: <200502041827.45302.brown@esteem.com>
References: <200502041827.45302.brown@esteem.com>
Message-ID: <200502041854.52836.brown@esteem.com>

On Friday 04 February 2005 18:27, Tom Brown wrote:
> Hi,
>
> I have what seems to be a simple problem. But I can not for the life of me
> find a way to send an integer over a socket. The send method will only
> accept strings. Here is what I am trying to do:
>
> testmessage = 'test message'
> msglen = len(testmessage)
> sock.send(msglen)
> sock.send(testmessage)
>
> Now, I know I can do this:
>
> testmessage = 'test message'
> sock.send('\xC') # send hard coded length of testmessage in hex in string
> sock.send(testmessage)
>
> However, in my actual program I will not know the length of testmessage in
> advance. So how do I convert msglen into a suitable format for the send
> method?
>
> Thanks,
> Tom

Ok, I think I've found what I was looking for. The marshal.dumps() function 
will convert my integer into a string representation of a fixed size. This 
way, on the other side, I know how many bytes to read to get the size of the 
string.

Thanks,
Tom


From noreply at python.org  Tue Feb  1 10:53:42 2005
From: noreply at python.org (Post Office)
Date: Tue, 1 Feb 2005 16:53:42 +0100
Subject: MDaemon Warning - virus found: Returned mail: see transcript for
	details
Message-ID: <20050201155412.C70B21E400A@bag.python.org>


******************************* WARNING ******************************
Este mensaje ha sido analizado por MDaemon AntiVirus y ha encontrado 
un fichero anexo(s) infectado(s).  Por favor revise el reporte de abajo.

Attachment                    Virus name               Action taken
----------------------------------------------------------------------
file.zip                      Email-Worm.Win32.Mydoom.m Removed


**********************************************************************


The original message was received at Tue, 1 Feb 2005 16:53:42 +0100 from python.org [96.182.125.158]

----- The following addresses had permanent fatal errors -----
<python-list at python.org>

----- Transcript of the session follows -----
... while talking to python.org.:
554 <python-list at python.org>... Message is too large
554 <python-list at python.org>... Service unavailable


From steven at lczmsoft.com  Wed Feb 23 23:02:16 2005
From: steven at lczmsoft.com (steven at lczmsoft.com)
Date: 23 Feb 2005 20:02:16 -0800
Subject: Source Encoding GBK/GB2312
Message-ID: <1109217736.643721.201240@o13g2000cwo.googlegroups.com>

When I specify an source encoding such as:

# -*- coding: GBK -*-
or
# -*- coding: GB2312 -*-

as the first line of source, I got the following error:

SyntaxError: 'unknown encoding: GBK'


Does this mean Python does not support GBK/GB2312?  What do I do?

-
narke



From bergt at cs.pdx.edu  Sat Feb 19 20:31:52 2005
From: bergt at cs.pdx.edu (Travis Berg)
Date: Sat, 19 Feb 2005 17:31:52 -0800 (PST)
Subject: segfault when calling Python from C thread
Message-ID: <Pine.GSO.4.58.0502191727370.29942@rukbat.cs.pdx.edu>


I'm running into a problem when trying to perform a callback to a Python
function from a C extension.  Specifically, the callback is being made by
a pthread that seems to cause the problem.  If I call the callback from
the parent process, it works fine.  The PyObject is static, and holds the
same value in both Parent and thread, so I'm at a loss as to what would be
different in the pthread from the parent that would cause a segfault on
the callback.  The machine specifics are an x86 intel processor with
RedHat linux.

Here is some clips of the C callback code showing how I'm storing the
callback, then what the actual callback function is like.  Any ideas?
The function being called is a simply to display the string of text, and
execution never seems to reach back to the Python code at all.

Thanks,
Travis B.


/* callback function to the Python code */
static PyObject * my_callback = NULL;

/* setting callback function */
static PyObject * my_set_callback(PyObject *dummy, PyObject *args)
{
    PyObject *result = NULL;
    PyObject *temp;
    PyObject *arglist;

    if (PyArg_ParseTuple(args, "O:set_callback", &temp)) {
        if (!PyCallable_Check(temp)) {
            PyErr_SetString(PyExc_TypeError,
				"parameter must be callable");
            return NULL;
        }
        Py_XINCREF(temp);         /* Add a reference to new callback */
        Py_XDECREF(my_callback);  /* Dispose of previous callback */
        my_callback = temp;       /* Remember new callback */
        /* return "None" */
        Py_INCREF(Py_None);
        result = Py_None;
    }
    return result;
}

/* calling callback */
void callback(char * str) {
    PyObject *arglist;
    PyObject *result;
    if(str == NULL)
        return;

    if(my_callback == NULL) {
        printf("no callback function provided, returning...\n");
        return;
    }

    /* Time to call the callback */
    arglist = Py_BuildValue("(s)", str);
    result = PyEval_CallObject(my_callback, arglist);
    Py_DECREF(arglist);
    if(result == NULL)
        return;
    Py_DECREF(result);
}


From aco at mi2.hr  Thu Feb 24 14:02:14 2005
From: aco at mi2.hr (Aleksandar Erkalovic)
Date: Thu, 24 Feb 2005 20:02:14 +0100
Subject: [ANN] TamTam collaboration software
Message-ID: <cvl8bl$672$1@magcargo.vodatel.hr>

Hi,

  on address (temporary):
     http://tamtam.mi2.hr:8888/NoviTam/

  you can find TamTam collaborative software. This is new version 
(rewrite) using Twisted and Nevow. This is not official announcement
just a small notice for people who are interested to check it, give me 
some critics, help in ideas or maybe help in development.

Aco

--
http://aco.mi2.hr/


From b at b.b  Sun Feb 13 18:33:50 2005
From: b at b.b (Roose)
Date: Sun, 13 Feb 2005 23:33:50 GMT
Subject: builtin functions for and and or?
References: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>
	<cuofcj$jvt$02$1@news.t-online.com>
Message-ID: <ytRPd.4677$ZZ.1609@newssvr23.news.prodigy.net>


"Diez B. Roggisch" <deetsNOSPAM at web.de> wrote in message
news:cuofcj$jvt$02$1 at news.t-online.com...
> > So usually I just write a little function any( L, boolean_function =
> > identity ) or all( ... ).  But I am kind of sick of doing that all the
> > time -- does it exist anywhere in the Python libraries?  It seems really
> > common to me.
>
> Put things into your own module and add it to your python path. Then you
> only have to write it once.

Well it's not as convenient as having it built in.  The thing is I'm not
just writing for myself.  I used it at my old job, and now I'm using it at
my new job.  There's a requirement that the user shouldn't have to modify
his setup beyond installing Python to run any scripts.  At my first job we
had one way of dealing with this.  Now there is another way.  And then I
need a way to deal with it at home with my personal stuff.

Also the stuff typically doesn't go under the Python dir, because that is
not mapped to source control.  And anyway people don't like mixing in our
code with 3rd party code.

The result that the path of least resistance is just to copy in a 4 line
function or two into the program and be done with it, even though it goes
against my sense of aesthetics.

It would be a lot simpler if it was included in the distribution.  I would
be willing to add it (even though it is completely trivial).  I think it
would go fine in itertools (I would even put them as builtins, but I'm not
going to go there because probably not everyone uses it as often as I do).

What do people think?  I have never done this, would I just write up a PEP?


>
> > The first way isn't satisfactory because it takes so many lines for what
> > is
> > essentially one "primitive" operation.  The second way isn't great
because
> > it is not as readable and many readers don't like to see reduce, even if
> > it
> > is a common idiom like that.  Also I don't believe it short circuits.
>
> It doesn't but so doesn't your loop example. Put a break in there once
> Result is False.
>
> --
> Regards,
>
> Diez B. Roggisch




From tech at gpao.cc  Tue Feb  1 03:52:49 2005
From: tech at gpao.cc (Olivier Noblanc ATOUSOFT)
Date: Tue, 1 Feb 2005 09:52:49 +0100
Subject: find isset() php function equivalent in python
Message-ID: <41ff435f$0$18835$8fcfb975@news.wanadoo.fr>

Hello


What is the equivalent function of php isset() in python

Thank you very much.

olivier noblanc
http://www.logiciel-erp.fr 




From kent37 at tds.net  Mon Feb  7 18:33:37 2005
From: kent37 at tds.net (Kent Johnson)
Date: Mon, 07 Feb 2005 18:33:37 -0500
Subject: Subclassing cElementTree.Element
Message-ID: <4207f801$1_2@newspeer2.tds.net>

Is it possible to subclass cElementTree.Element? I tried
  >>> import cElementTree as et
  >>> class Elt(et.Element):
  ...   pass
  ...
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: Error when calling the metaclass bases
     cannot create 'builtin_function_or_method' instances

I want to create a tree where I can navigate from a node to its parent. The standard Element class
doesn't seem to support this so I am trying to make a subclass that does. The XML files in question
are large so the speed of cElementTree is very helpful.

Thanks,
Kent

(apologies if this is a duplicate post)


From mac at ceti.pl  Wed Feb  9 17:32:55 2005
From: mac at ceti.pl (mac)
Date: Wed, 9 Feb 2005 22:32:55 +0000 (UTC)
Subject: Seekable output from ClientForm?
References: <35993bcb.0502091338.34591a7@posting.google.com>
Message-ID: <slrnd0l3sn.ddn.mac@tau.ceti.pl>

In article <35993bcb.0502091338.34591a7 at posting.google.com>, Matej Cepl wrote:
> Hi,
> 
> using python 2.3, ClientForm, and ClientCookie and I have this code:
> 
> opener = ClientCookie.build_opener(ClientCookie.HTTPRefererProcessor,
>                                    ClientCookie.HTTPRefreshProcessor,
>                                    ClientCookie.SeekableProcessor)
> 
> response = opener.open(lxURL)
> forms = ClientForm.ParseResponse(response)
> form = forms[0]
> response.seek(0)
> 
> form['extpatid'] = MyNEUlogin
> form['extpatpw'] = MyNEUpassword
> formopener = form.click()
> 
> response2 = ClientCookie.urlopen(formopener)
>
> guidednews = re.compile("s_guidednews.html")
> 
> response2.seek(0)
> h = htmllib.HTMLParser(formatter.NullFormatter())
> h.feed(response2.read())
> print h.anchorlist
> 
> Unfortunately, it doesn't work, because response2 was created by
> ClientForm and it is not seekable (apparently, I get "AttributeError:
> addinfourl instance has no attribute 'seek'").
> 
> How to make output of ClientForm seekable, please?

Instead of:
  response2 = ClientCookie.urlopen(formopener)
try:
  opener.open(formopener)

Cheers, 
Maciek



From steven.bethard at gmail.com  Tue Feb 15 20:03:14 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 15 Feb 2005 18:03:14 -0700
Subject: __new__ does not call __init__ as described in descrintro.html (WAS:
 Can __new__ prevent __init__ from being called?)
Message-ID: <pvWdnUJ3hIROBo_fRVn-jw@comcast.com>

Felix Wiemann wrote:
 > Steven Bethard wrote:
 >>     http://www.python.org/2.2.3/descrintro.html#__new__
 >
[snip]
 >
 > I'm just seeing that the web page says:
 >
 > | If you return an existing object, the constructor call will still
 > | call its __init__ method. If you return an object of a different
 > | class, its __init__ method will be called.
 >
 > However, the latter doesn't seem to be true, or am I missing
 > something?
 >
 >>>>class A(object):
 > ...   def __init__(self):
 > ...     print 'Init of A.'
 > ...
 >
 >>>>instance = A()
 > Init of A.
 >
 >>>>class B(object):
 > ...   def __new__(self):
 > ...     return instance
 > ...   def __init__(self):
 > ...     print 'Init of B.'
 > ...
 >
 >>>>B()  # <--------- A's __init__ is *not* called.
 > <__main__.A object at 0x4062424c>
 >
 >>>>instance = object.__new__(B)
 >>>>B()  # <--------- B's __init__ is called
 > Init of B.
 > <__main__.B object at 0x406243ec>
 >
 > So there seems to be some type-checking in type.__call__.

Yeah, I saw the same thing in playing around with this.  Don't know what 
to make of it.  I wonder if we should file a documentation bug?  I can't 
find __new__ explained anywhere in the Language Reference.  Can 
documentation bugs be filed for descrintro.html?

STeVe


From francis.girard at free.fr  Sun Feb  6 14:50:40 2005
From: francis.girard at free.fr (Francis Girard)
Date: Sun, 6 Feb 2005 20:50:40 +0100
Subject: remove duplicates from list *preserving order*
In-Reply-To: <BfmdnTjWquaJEZ_fRVn-3A@comcast.com>
References: <BfmdnTjWquaJEZ_fRVn-3A@comcast.com>
Message-ID: <200502062050.41424.francis.girard@free.fr>

Hi,

I think your last solution is not good unless your "list" is sorted (in which 
case the solution is trivial) since you certainly do have to see all the 
elements in the list before deciding that a given element is not a duplicate. 
You have to exhaust the iteratable before yielding anything.

Besides that, I was thinking that the best solution presented here proceed in 
two steps :

1- Check that an element is not already in some ordered data type of already 
seen element

2- If not, put the element in that structure

That's probably twice the work.

There might be some way to do both at the same time, i.e.

- Put the element in the data structure only if not already there and tell me, 
with some boolean, if you did put the element.

Then you have to do the work of finding the right place where to insert 
(fetch) the element only once. I don't see any easy way to do this in python, 
other than rolling your sleeves and code your own data structure in Python, 
which would be slowlier than the provided dict or set C implementation.

I think this a hole into the Pythin libs.

Regards

Francis Girard

Le jeudi 3 F?vrier 2005 21:39, Steven Bethard a ?crit?:
> I'm sorry, I assume this has been discussed somewhere already, but I
> found only a few hits in Google Groups...  If you know where there's a
> good summary, please feel free to direct me there.
>
>
> I have a list[1] of objects from which I need to remove duplicates.  I
> have to maintain the list order though, so solutions like set(lst), etc.
> will not work for me.  What are my options?  So far, I can see:
>
> def filterdups(iterable):
>      result = []
>      for item in iterable:
>          if item not in result:
>              result.append(item)
>      return result
>
> def filterdups(iterable):
>      result = []
>      seen = set()
>      for item in iterable:
>          if item not in seen:
>              result.append(item)
>              seen.add(item)
>      return result
>
> def filterdups(iterable):
>      seen = set()
>      for item in iterable:
>          if item not in seen:
>              seen.add(item)
>              yield item
>
> Does anyone have a better[2] solution?
>
> STeve
>
> [1] Well, actually it's an iterable of objects, but I can convert it to
> a list if that's helpful.
>
> [2] Yes I know, "better" is ambiguous.  If it helps any, for my
> particular situation, speed is probably more important than memory, so
> I'm leaning towards the second or third implementation.



From gabriel.barros at gmail.com  Sun Feb 27 01:46:28 2005
From: gabriel.barros at gmail.com (Gabriel B.)
Date: Sun, 27 Feb 2005 03:46:28 -0300
Subject: simple input that can understand special keys?
Message-ID: <5175a81c05022622466f9c2321@mail.gmail.com>

i'm writting an application that will use Tinker in a newer future.
Now it's console only. I simply ommit some data on the display,
print() some other and go on. The problem is that i can't test the
actions tiggered by special keys, like Page Up/Down or the F1...12

Right now i'm using raw_input() since even the Tk version will have
only one input place, and for debuging i'm literally writting pageup,
pagedow and the F's. But i want to put it in test while i write the
GUI.

is there any hope for me? I wanted to stay only with the console for
now. And it's windows by the way :)

Thanks


From philippe at philippecmartin.com  Mon Feb  7 17:25:35 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Mon, 07 Feb 2005 22:25:35 GMT
Subject: socket question
References: <mailman.2089.1107796309.22381.python-list@python.org>
	<36pm9uF53qlqdU1@individual.net>
	<pan.2005.02.07.17.48.10.131474@philippecmartin.com>
	<1107802933.017870.84480@g14g2000cwa.googlegroups.com>
Message-ID: <pan.2005.02.07.22.25.28.631854@philippecmartin.com>

Thanks, it was a bind problem: socket.gethostname() returns 'localhost'
where '' is was was needed.

Regards,

Philippe



On Mon, 07 Feb 2005 11:02:13 -0800, Kartic wrote:

> 
> Philippe C. Martin wrote:
>> >> My problem is that I cannot connect to my server if the client is
> not on
>> >> the same PC (although I'm doing the above).
> 
> 
> Does the machine running the server code also have a firewall installed
> that blocks access to the server port from outside? That is the only
> possibility I can think of that prevents a non-local client from
> connecting.
> 
> Also, please do a netstat -a on the machine running the server and see
> the IP addresses to which the listening port is bound.
> 
> Thanks,
> -Kartic



From daniel.dittmar at sap.corp  Thu Feb 10 10:23:09 2005
From: daniel.dittmar at sap.corp (Daniel Dittmar)
Date: Thu, 10 Feb 2005 16:23:09 +0100
Subject: sre is broken in SuSE 9.2
In-Reply-To: <mailman.2299.1108029731.22381.python-list@python.org>
References: <mailman.2299.1108029731.22381.python-list@python.org>
Message-ID: <cufu9t$j37$1@news.sap-ag.de>

Denis S. Otkidach wrote:

> On all platfroms \w matches all unicode letters when used with flag
> re.UNICODE, but this doesn't work on SuSE 9.2:

I think Python on SuSE 9.2 uses UCS4 for unicode strings (as does 
RedHat), check sys.maxunicode.

This is not an explanation, but perhaps a hint where to look.

Daniel


From neutrinman at myrealbox.com  Thu Feb 17 21:13:46 2005
From: neutrinman at myrealbox.com (neutrinman at myrealbox.com)
Date: 17 Feb 2005 18:13:46 -0800
Subject: how can i randomly choose keys in dictionary
Message-ID: <1108692826.040660.71750@g14g2000cwa.googlegroups.com>

Hi,there. How can I choose a key in dictionary randomly?

Say, random.choice() in lists,

or in lists:
lists = [1,2,3,4]
position = random.range(len(lists))
word = lists[position]



From mwm at mired.org  Fri Feb 25 16:13:41 2005
From: mwm at mired.org (Mike Meyer)
Date: Fri, 25 Feb 2005 15:13:41 -0600
Subject: Converting HTML to ASCII
References: <20050225185147.43095.qmail@web20703.mail.yahoo.com>
	<mailman.3068.1109361513.22381.python-list@python.org>
Message-ID: <86is4gfim2.fsf@guru.mired.org>

Michael Spencer <mahs at telcopartners.com> writes:

> gf gf wrote:
>> [wants to extract ASCII from badly-formed HTML and thinks BeautifulSoup is too complex]
>
> You haven't specified what you mean by "extracting" ASCII, but I'll
> assume that you want to start by eliminating html tags and comments,
> which is easy enough with a couple of regular expressions:
>
>   >>> import re
>   >>> comments = re.compile('<!--.*?-->', re.DOTALL)
>   >>> tags = re.compile('<.*?>', re.DOTALL)
>   ...
>   >>> def striptags(text):
>   ...     text = re.sub(comments,'', text)
>   ...     text = re.sub(tags,'', text)
>   ...     return text
>   ...
>   >>> def collapsenewlines(text):
>   ...     return "\n".join(line for line in text.splitlines() if line)
>   ...
>   >>> import urllib2
>   >>> f = urllib2.urlopen('http://www.python.org/')
>   >>> source = f.read()
>   >>> text = collapsenewlines(striptags(source))
>   >>>
>
> This will of course fail if there is a "<" without a ">", probably in
> other cases too.  But it is indifferent to whether the html is
> well-formed.

It also fails on tags with a ">" in a string in the tag. That's
well-formed but ill-used HTML.

            <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From deetsNOSPAM at web.de  Sun Feb 27 11:17:02 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sun, 27 Feb 2005 17:17:02 +0100
Subject: Sharing a method (function) among several objects.
References: <1109517248.084515.104280@z14g2000cwz.googlegroups.com>
Message-ID: <cvsrps$ubj$03$1@news.t-online.com>

> Since they are not the same or similar, it's not logical to use a
> common superclass.

As python supports multiple inheritance, it's very well "logical" to do it
by subclassing.

> 
> So I'm asking, what's a good way to allow those objects to share that
> function?
> 
> The best solution I've found so far is to put that function in a
> module, and have all objects import and use it. But I doubt that's a
> good use-case for modules; writing and importing a module that contains
> just a single function seems like an abuse.

A module is a unit of code that (should) encapsulate a certain
functionality. So it's perfect for your needs. There is no law or even rule
of thumb that makes claims about module size (or the lack of, for this
matter). So create a module - it doesn't cost you anything. 
-- 
Regards,

Diez B. Roggisch


From qwweeeit at yahoo.it  Mon Feb  7 09:14:38 2005
From: qwweeeit at yahoo.it (qwweeeit)
Date: 7 Feb 2005 06:14:38 -0800
Subject: PySol: using Qt  (as a case study)
Message-ID: <2ab23d7a.0502070614.32881704@posting.google.com>

PySol uses TKinter as GUI system.

Wanting to learn python I am studying PySol, but having choosed Qt as
my GUI, I am asking if someone can comment on my choice both on pysol
as as an application worth to study (I want to implement a card game)
and mainly on Qt choice.

Perhaps it would be better if I choose an application already written
in python and Qt (or PyQt)... but I do not know any in the card games
field.

A last thing. I was not favourably impressed by the behaviour of the
PySol Programming Group (www.pysol.org):

"Due to recent happenings (some distributions "patch" out sound
support, some companies sell disguised PySol versions as their own
programs, ...) any work on PySol4 has been stopped, and only the
source code remains available. After more than six years of work on
PySol I realize more and more that the GNU GPL does not work out for
game-like programs, and I'm seriously considering using some stricter
license for PySol5."


From noreply at python.org  Fri Feb 11 10:59:36 2005
From: noreply at python.org (Mail Delivery Subsystem)
Date: Fri, 11 Feb 2005 16:59:36 +0100
Subject: MDaemon Warning - virus found: Returned mail: Data format error
Message-ID: <20050211160013.3DBF41E401C@bag.python.org>


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From aleaxit at yahoo.com  Sun Feb  6 17:26:11 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 6 Feb 2005 23:26:11 +0100
Subject: empty classes as c structs?
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>
	<mailman.1973.1107618702.22381.python-list@python.org>
	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>
	<mailman.2006.1107658273.22381.python-list@python.org>
	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>
	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>
	<4qCdnXM11-uVGJvfRVn-vQ@comcast.com>
Message-ID: <1grl4od.1niw3nhvo753cN%aleaxit@yahoo.com>

Steven Bethard <steven.bethard at gmail.com> wrote:

> Seems pretty reasonable -- the only thing I worry about is that 
> classmethods and other attributes (e.g. properties) that are accessible
> from instances can lead to subtle bugs when a user accidentally 
> initializes a Bunch object with the attributes of the same name, e.g.:
> 
>      b = Bunch(getDict=1)
> 
> where
> 
>      b.getDict()
> 
> now fails with something like "TypeError: 'int' object is not callable".

Well, that's the problem with confusing items and attributes in the
first place, of course -- which IS Bunch's purpose;-)

>   (For another discussion about this problem, see [1]).
> 
> I don't know what the right solution is here...  I wonder if I should
> write a classmethod-style descriptor that disallows the calling of a 
> function from an instance?  Or maybe I should just document that the 
> classmethods should only be called from the class?  Hmm...

Another approach is to add a few "reserved words" to the ones Python
itself would reject in the initialization.  Just you cannot do:

    b = Bunch(continue=23)

you may choose to forbid using getDict=42 - if you do that you probably
want to forbid any magicname too, since e.g.

    b = Bunch(__dict__=99)

can't work ``right'' no matter what, while setting e.g. __deepcopy__
similarly might confuse any copy.deepcopy(b), etc, etc.

> How do you feel about getDict and setDict also being classmethods?

Uh?  I want to get or set the dict of a specific instance -- not those
of the whole class.  How would you design them as classmethods...?


Alex


From premshree.pillai at gmail.com  Mon Feb 28 12:20:04 2005
From: premshree.pillai at gmail.com (Premshree Pillai)
Date: Mon, 28 Feb 2005 22:50:04 +0530
Subject: [ANN] PyAC 0.1.0
Message-ID: <bbe2162d050228092073da3f76@mail.gmail.com>

PyAC 0.1.0 (http://sourceforge.net/projects/pyac/)

* ignores non-image files 
* optional arg is_ppt for ordering presentation images (eg.,
Powerpoint files exported as images)
* misc fixes

Package here: http://sourceforge.net/project/showfiles.php?group_id=106998&package_id=115396&release_id=309010

-- 
Premshree Pillai
http://www.livejournal.com/users/premshree/


From ilias at lazaridis.com  Wed Feb 23 12:45:46 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Wed, 23 Feb 2005 19:45:46 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <8BIQdyL$iLHCFw9a@objmedia.demon.co.uk>
References: <cuo71l$gig$1@usenet.otenet.gr> <cvaoft$av6$1@usenet.otenet.gr>
	<874qg6937w.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<cvcv9b$nbm$1@usenet.otenet.gr> <37uk2kF5gv38bU1@individual.net>
	<nmSSd.25321$Am3.782245@news20.bellglobal.com>
	<cvi2c5$ibu$1@usenet.otenet.gr>
	<421c91c8$0$44647$a1866201@visi.com>
	<cvi5s1$4l5$1@usenet.otenet.gr> <383qkkF5k6rf4U1@individual.net>
	<8BIQdyL$iLHCFw9a@objmedia.demon.co.uk>
Message-ID: <421CC14A.4050708@lazaridis.com>

Stephen Kellett wrote:
[...]
> Who's Guido?

Guido is the one, who should care by time about the status of the 
python-community.

-

I've send an addition CC of this message to the python-foundation, which 
  will hopefully take some steps to improve the build-system.

[EVALUATION] - E02 - Support for MinGW Open Source Compiler
Essence:
http://groups-beta.google.com/group/comp.lang.python/msg/5ba2a0ba55d4c102

-

Thank's for every bit of contribution, which has made this thread an 
worthfull insight into the python-community.

.

-- 
http://lazaridis.com


From exogen at gmail.com  Fri Feb 18 18:48:09 2005
From: exogen at gmail.com (Brian Beck)
Date: Fri, 18 Feb 2005 18:48:09 -0500
Subject: selecting dictionaries to maximize counts
In-Reply-To: <oPGdnQfZXPnD0YvfRVn-oQ@comcast.com>
References: <oPGdnQfZXPnD0YvfRVn-oQ@comcast.com>
Message-ID: <cv5v18$l9t$1@eeyore.INS.cwru.edu>

Steven Bethard wrote:
> I have a list of dictionaries.  Each dictionary holds counts of various 
> 'words', e.g.:
> 
> py> countdicts = [
> ...     dict(a=9, b=9, c=9),
> ...     dict(a=8, b=7),
> ...     dict(a=4, b=5, c=12)]
> 
> I need to select dicts with the constraint that the number of each 
> 'word' totalled over all selected dicts doesn't exceed a given 
> MAX_VALUE.  Right now, I do this by:

Not that you can't still improve performance of course, but this is an 
NP-complete problem if you didn't know, so don't bang your head too hard...

--
Brian Beck
Adventurer of the First Order


From marcel.vandendungen at gmail.com  Wed Feb  2 16:46:25 2005
From: marcel.vandendungen at gmail.com (Marcel van den Dungen)
Date: Wed, 02 Feb 2005 22:46:25 +0100
Subject: Basic file operation questions
In-Reply-To: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
References: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
Message-ID: <ctrhrf$g49$1@sea.gmane.org>

alex wrote:
> Hi,
> 
> I am a beginner with python and here is my first question:
> How can I read the contents of a file using a loop or something? I open
> the file with file=open(filename, 'r') and what to do then? Can I use
> something like
> 
> for xxx in file:
>    ....
> 
> 
> Thanks for help
> Alex
> 
take a look at this:
http://www.devshed.com/c/a/Python/File-Management-in-Python/

HTH,
-- Marcel



From steven.bethard at gmail.com  Mon Feb 21 17:15:43 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 21 Feb 2005 15:15:43 -0700
Subject: Tuple index
In-Reply-To: <cvdll3$f4u$1@news.netins.net>
References: <cvbcc6$b5f$1@news.netins.net>
	<1108951559.490554.305310@l41g2000cwc.googlegroups.com>
	<cvdian$ejs$1@news.netins.net> <zvOdneQkB6SyzoffRVn-jw@comcast.com>
	<cvdll3$f4u$1@news.netins.net>
Message-ID: <bbKdnR8nSbAXwIffRVn-rg@comcast.com>

Steve M wrote:
> I'm actually doing this as part of an exercise from a book. What the program
> is supposed to do is be a word guessing game. The program automaticly
> randomly selects a word from a tuple. You then have the oportunity to ask
> for a hint. I created another tuple of hints, where the order of the hints
> correspond to the word order. I was thinking if I could get the index
> position of the randomly selected word, I pass that to the hints tuple to
> display the correct hint from the hints tuple. I'm trying to do it this way
> as the book I'm using has not gotten to lists yet.

I'm guessing it also hasn't gotten to dicts yet either?  Perhaps a 
somewhat more natural way of doing this would be something like:

py> hints = dict(word1="here's hint 1!",
...              word2="here's hint 2!",
...              word3="here's hint 3!")
py> words = list(hints)
py> import random
py> selected_word = random.choice(words)
py> selected_word
'word3'
py> print hints[selected_word]
here's hint 3!

That said, if you want to find the index of a word in a tuple without 
using list methods, here are a couple of possibilities, hopefully one of 
which matches the constructs you've seen so far:

py> t = ("fred", "barney", "foo")

py> for i, word in enumerate(t):
...     if word == "barney":
...         break
...
py> i
1

py> for i in range(len(t)):
...     if t[i] == "barney":
...         break
...
py> i
1

py> i = 0
py> for word in t:
...     if word == "barney":
...         break
...     i += 1
...
py> i
1

HTH,

STeVe


From flupke at nonexistingdomain.com  Thu Feb 17 11:32:35 2005
From: flupke at nonexistingdomain.com (flupke)
Date: Thu, 17 Feb 2005 16:32:35 GMT
Subject: site indexer and search script
Message-ID: <DG3Rd.13951$%g.1132615@phobos.telenet-ops.be>

Hi,


for an old intranet that is still used here, i would like to add a 
search function.

I think there migth already be an indexer/search script available in 
python. I've googled and come across a few scripts but i'm not sure 
which one is really easy and good at the task.
Any good scripts (and easy to configure) around?

I would like to use python to generate the corresponding results page, 
what would i use for that, again bearing in mind that it needs to be 
done quite quickly so i cannot afford to waste to much time ?

Is mod_python usable for such a simple page generation or would i better 
focus on Twisted or CherryPie?

Thanks,
Benedict


From softpro at gmx.net  Mon Feb 14 23:50:49 2005
From: softpro at gmx.net (Johannes Ahl-mann)
Date: Tue, 15 Feb 2005 05:50:49 +0100
Subject: image fourier transform
Message-ID: <curv39$jsl$01$1@news.t-online.com>

hi,

i've been looking all around the net (google is my friend ;-) for a
module to apply fourier transformations on images. the different ones in
numerical python and scientific python seem all to be operating on
sequences and therefore seem to be 1D fourier transform.

anyone know a library/module to do 2D image FFT in a simple manner.

or am i just too dumb to see how this is supposed to work with the 1D
fourier transforms??

thx,

Johannes


From p at ulmcnett.com  Mon Feb 28 11:00:16 2005
From: p at ulmcnett.com (Paul McNett)
Date: Mon, 28 Feb 2005 08:00:16 -0800
Subject: wxGrid
In-Reply-To: <1109574065.613518.241750@l41g2000cwc.googlegroups.com>
References: <1109574065.613518.241750@l41g2000cwc.googlegroups.com>
Message-ID: <42234010.7070009@ulmcnett.com>

Gensek wrote:
> I have a grid. I want to sort it when a column label is clicked. I know
> about the EVT_GRID_LABEL_LEFT_DCLICK event, but that is not enough. I
> do not merely need to know that a label was clicked. I need to know
> which label was clicked. I do not know how to do that. I suspect you
> might know. I request that you tell me.

Please see:

http://wiki.wxpython.org/index.cgi/DrawingOnGridColumnLabel

It tells you how to draw a sort indicator on the clicked header, which 
involves first figuring out which header was clicked. As you've found, 
the entire header region is one wxWindow, not one per column, which does 
make it a bit more difficult to sort out which column header was 
clicked. This sample does not go on to show you how to actually do the 
sorting, however.


> I also wish to know some other things: how to find out the location of
> a mouse pointer in a wxWindow (or at least the frame), 

Bind a function to the wx.EVT_MOTION event, and then call GetPosition() 
of the event instance, which returns a (x,y) tuple of the mouse position 
at the time the event was generated. x and y are relative to the window 
that emitted the event.


> and how to
> change the color of a single specified pixel in a bitmap.

I don't know how to do this, but I'd take a look at the docs for 
wxBitmap for starters.


> I use Python 2.3, wxPython 2.4.2.

You should upgrade to wxPython 2.5.3 (2.5.4 is around the corner 
though). If you have a bunch of code already written for 2.4, you'll 
want to upgrade carefully and refer to the migration guide at 
http://wxpython.org first. Otherwise, if you are just starting with 
wxPython, trust me you definitely want to upgrade ASAP - a lot of bugs 
have been fixed and new features added since 2.4.2, and wxPython experts 
will be better able to help you if you use a recent version...

Also, you may find more and better help by joining the wxpython-users 
list - you can find a link at http://wxpython.org.

-- 
pkm ~ http://paulmcnett.com


From bpeng at rice.edu  Fri Feb  4 15:27:42 2005
From: bpeng at rice.edu (Bo Peng)
Date: Fri, 04 Feb 2005 14:27:42 -0600
Subject: changing local namespace of a function
Message-ID: <cu0lru$8ik$1@joe.rice.edu>

Dear list,

I have many dictionaries with the same set of keys and I would like to 
write a function to calculate something based on these values. For 
example, I have

a = {'x':1, 'y':2}
b = {'x':3, 'y':3}

def fun(dict):
   dict['z'] = dict['x'] + dict['y']

fun(a) and fun(b) will set z in each dictionary as the sum of x and y.

My function and dictionaries are a lot more complicated than these so I 
would like to set dict as the default namespace of fun. Is this 
possible? The ideal code would be:

def fun(dict):
   # set dict as local namespace
   # locals() = dict?
   z = x + y

Many thanks in advance.
Bo


From apardon at forel.vub.ac.be  Tue Feb  8 05:00:41 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 8 Feb 2005 10:00:41 GMT
Subject: variable declaration
References: <4202A022.3050209@netscape.net>
	<MSGID_2=3A5025=2F3.131_4204b0a9@fidonet.org>
	<mailman.1978.1107622451.22381.python-list@python.org>
	<slrnd0epjg.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2069.1107783321.22381.python-list@python.org>
	<slrnd0esqn.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2152.1107854937.22381.python-list@python.org>
Message-ID: <slrnd0h3e9.26q.apardon@rcpc42.vub.ac.be>

Op 2005-02-08, Nick Coghlan schreef <ncoghlan at iinet.net.au>:
> Antoon Pardon wrote:ons already existing.
>> The compilor might generate a RESTORE instruction.
>
> Whether it is done as a LOAD/STORE or a RESTORE, it has to perform the same work 
> - check the name exists in the local namespace, and throw an exception if it 
> doesn't. If it the name does exist, perform a normal store operation.

It has to check if the name exists anyway. Because if it doesn't it has
to be created in the namespace directory and in the other case only
the value part has to be changed.

I have the impression you are looking at this too much from the view
of the current implementation where putting a an entry in
a directory is seen as an atomic operation.

So a possibility might be to augment dictionaries with a put method.
d.put(key, value) would throw an exception if the key wasn't already
in the dictionary but would otherwise behave as d[key] = value.

A STORE would then be implemented as a d[key] = value
A RESTORE would then be implemented as a d.put(key,value)

The latter wouldn't have to do more, it would just behave
different.

>>>but the optimiser should 
>>>eventually be able to do something to eliminate the performance penalty due to 
>>>the technically unnecessary LOAD. I doubt it will be able to beat a STORE_FAST 
>>>when it comes to trying to get a performance improvement, though :)
>> 
>> 
>> But maybe a RESTORE_FAST could.
>
> STORE_FAST is set up to store a local as fast as is reasonably possible. The 
> space for the local is preallocated in the fast locals C array. How is an 
> instruction which does that *and something else* ever meant to be faster?

I don't know enough about pythons internals to answer here. Maybe you
have a point in this case, but you already stated that a RESTORE
would need more work then a STORE where IMO that was not the case,
so I'm not convinced the same kind of solution is not applicable here.

-- 
Antoon Pardon


From dbickett at gmail.com  Sat Feb  5 14:18:07 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Sat, 5 Feb 2005 14:18:07 -0500
Subject: Which IDE supports python and wxpython?
In-Reply-To: <oS8Nd.4231$bw.168035@phobos.telenet-ops.be>
References: <oS8Nd.4231$bw.168035@phobos.telenet-ops.be>
Message-ID: <1d6cdae30502051118f976284@mail.gmail.com>

I know of two:

Boa Constructor:   http://boa-constructor.sourceforge.net/
wxGlade:              http://wxglade.sourceforge.net/

-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From luke at tatooine.planet  Mon Feb  7 21:49:40 2005
From: luke at tatooine.planet (Luke Skywalker)
Date: Tue, 08 Feb 2005 03:49:40 +0100
Subject: Big development in the GUI realm
References: <mailman.2135.1107829480.22381.python-list@python.org>
Message-ID: <e0ag011atnlt5b00klicjol93c7j8fe341@4ax.com>

On Tue, 08 Feb 2005 13:24:35 +1100, Tim Churches
<tchur at optushome.com.au> wrote:
>: NOTE! This copyright does *not* cover user programs that use kernel
>: services by normal system calls - this is merely considered normal use
>: of the kernel, and does *not* fall under the heading of "derived work".

OK, so according to Linus, the GPL allows a proprietary program to
make calls to the kernel, but TrollTech says the GPL doesn't allow a
proprietary program to make calls to the Qt library.

It's this double-standard that I find confusing, since both projects
are said to be based on the same license. I wouldn't have any problem
if Qt had built its own GPL-derived, custom license, but they claim
it's the same ol' GPL. Hence the questioning.

Luke.


From __peter__ at web.de  Sun Feb 20 12:41:30 2005
From: __peter__ at web.de (Peter Otten)
Date: Sun, 20 Feb 2005 18:41:30 +0100
Subject: intersection of 2 list of pairs
References: <1108920276.253388.23590@f14g2000cwb.googlegroups.com>
Message-ID: <cvai3t$6cv$04$1@news.t-online.com>

les_ander at yahoo.com wrote:

> I have 2 lists of tuples that look like:
> E1=[('a','g'),('r','s')] and
> E2=[('g','a'),('r','q'),('f','h')].
> In this tuple, the ordering does not
> matter, i.e. (u,v) is the same as (v,u).
> 
> What I want to do is the following:
> given 2 list of tuples, E1 and E2, I want to create another list with
> tuples that are common to both. So in the above example I would like
> to return ('a','g') as being common.
> 

How about

>>> e1 = [('a', 'g'), ('r', 's')]
>>> e2 = [('g', 'a'), ('r', 'q'), ('f', 'h')]
>>> s2 = set(e2)
>>> s2.update((b, a) for (a, b) in e2)
>>> list(set(e1) & s2)
[('a', 'g')]

If you are on 2.3, continue to use Set instead of set and modify the update
line to use a list comprehension:

s2.update([(b, a) for (a, b) in e2])

Peter



From alan.mcintyre at esrgtech.com  Sat Feb  5 08:54:41 2005
From: alan.mcintyre at esrgtech.com (Alan McIntyre)
Date: Sat, 05 Feb 2005 08:54:41 -0500
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <1107606972.861993.250330@f14g2000cwb.googlegroups.com>
References: <dvOMd.33656$EG1.19314@lakeread04>
	<1107606972.861993.250330@f14g2000cwb.googlegroups.com>
Message-ID: <Ge4Nd.103631$Jk5.74253@lakeread01>

Tony,

Actually I only want to remove a certain kind of duplication; if an item 
occurs twice - say like this: [1,1,1,2,2,2,1,1,1], then I need to keep 
the order and occurrence of the individual values: [1,2,1].  Using a 
dict as you proposed loses the order of occurrence, as well as multiple 
occurrences of groups of the same item.

If I didn't need those two qualities of the list to be preserved, 
though, I think I'd use something like your solution (if I was using a 
Python older than 2.3) or Steve Coats' solution posted above using Set.

Thanks!
Alan

Tony wrote:
> Here is a version using dictionary properties, ie no duplication of
> keys.
> 
> def condense(l):
>  d={}
>  for item in l:
>     d[item]=1
>  l=d.keys()
>  return l
> 
> Cheers
> Tony
> 


From MrJean1 at gmail.com  Fri Feb 11 14:31:27 2005
From: MrJean1 at gmail.com (python)
Date: 11 Feb 2005 11:31:27 -0800
Subject: Injecting a C side object into the local dict
In-Reply-To: <1108135964.686350.115090@f14g2000cwb.googlegroups.com>
References: <1108135964.686350.115090@f14g2000cwb.googlegroups.com>
Message-ID: <1108150287.774583.105690@l41g2000cwc.googlegroups.com>

Take a look at Pyrex.


  <http://nz.cosc.canterbury.ac.nz/~greg/python/Pyrex/>

More at

  <http://www-106.ibm.com/developerworks/library/l-cppyrex.html>


/Jean Brouwers


Jamie R. Parent wrote:
> Hello,
>
> How do you go about taking a variable which was declared in C and
pass
> that through to a Python script? I have tried doing this by adding a
> simple string which is a PyObject from C into the local dictionary
and
> retrieving it from script via a locals()["myCvar"] print statement.
> This however does not seem to work. It would seem that when the
scripts
> are ran the local dictionary with the added item is wiped clean and a
> new local dictionary is instead used. Any direction or help would be
> appreciated.
> 
> Cheers,
> Jamie.



From fredrik at pythonware.com  Mon Feb 14 15:15:07 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 21:15:07 +0100
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr><1108405626.130007.320710@l41g2000cwc.googlegroups.com><mailman.2561.1108409059.22381.python-list@python.org>
	<1108411017.507814.229600@c13g2000cwb.googlegroups.com>
Message-ID: <cur0na$d4t$1@sea.gmane.org>

"Pat" wrote:

> Okay, I think we are pretty much talking about the same thing.  My
> problem is not that I'm unable or unwilling to purchase a good
> compiler.  My problem is that I don't want to make it a requirement of
> my users.  The twist is that my users will be working out of a
> Subversion repository that includes source code for extensions written
> in C.  Those extensions need to be compiled, and the code changes too
> frequently for me to want to deal with supplying compiled binaries.

here's what I do to supply compiled binaries for 2.1 through 2.4:

    > mkall
    > upload dist

> So I'm looking for options for Windows users who do not have, and are
> unwilling to get, a Microsoft compiler.  For some users, minGW is an
> attractive option.  For those who want to use minGW, I'm trying to
> establish whether or not minGW is a viable option, particularly for
> Python 2.4.

here's what I just did (time in minutes):

    +00: googled for the mingw home page
    +00: found the mingw download page
    +02: finally figured out what to download
    +03: noticed that my usual SF site only offered 1K/s; aborted download
    +07: finished downloading the mingw kit from another SF site
    +17: finished installing
    +18: added \mingw\bin to the path
    +18: typed "python setup.py install --compiler=mingw32"
    +18: got a linker error; googled for help
    +19: copied python24.dll to \mingw\lib
    +20: finished building the sample library (cElementTree); all tests pass

so what's your excuse for not doing this? ;-)

</F> 





From removethis.kartic.krishnamurthy at gmail.com  Tue Feb 22 18:30:09 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Tue, 22 Feb 2005 23:30:09 GMT
Subject: searching pdf files for certain info
In-Reply-To: <cvfdgg$fr0$1@solaris.cc.vt.edu>
References: <cvfdgg$fr0$1@solaris.cc.vt.edu>
Message-ID: <5gPSd.34704$H05.24580@twister.nyroc.rr.com>

rbt said the following on 2/22/2005 8:53 AM:
> Not really a Python question... but here goes: Is there a way to read 
> the content of a PDF file and decode it with Python? I'd like to read 
> PDF's, decode them, and then search the data for certain strings.
> 
> Thanks, rbt

Hi,

Try pdftotext which is part of the XPdf project. pdftotext extracts 
textual information from a PDF file to an output text file of your 
choice. I have used it in the past (not with Python) to do what you are 
attempting. It is a small program and you can invoke from python and 
search for the string/pattern you want.

You can download for your OS from:
http://www.foolabs.com/xpdf/download.html

Thanks,
-Kartic


From brent.hughes at comcast.net  Fri Feb  4 15:35:04 2005
From: brent.hughes at comcast.net (Brent W. Hughes)
Date: Fri, 4 Feb 2005 13:35:04 -0700
Subject: Possibly OT: Controlling winamp with Python
References: <JZOdnVLIY48-S57fRVn-hA@comcast.com>
	<1107548407.626431.171350@z14g2000cwz.googlegroups.com>
Message-ID: <O-udnS69k4nmQZ7fRVn-hQ@comcast.com>

The Python program won't decide whether a commercial is playing, I will.  At 
that point, I will run my program which will press mute, wait 20 seconds, 
and then press mute again.

Actually, I could leave the program running but minimized to the task bar. 
When I hear the advertisement, I just click on the program in the task bar. 
It knows what to do from there.

Brent


"Kartic" <kartic.krishnamurthy at gmail.com> wrote in message 
news:1107548407.626431.171350 at z14g2000cwz.googlegroups.com...
> Brent,
>
> Question : how will your python script distinguish between a commercial
> and a song?
>
> I can understand if you are writing a streaming client in Python; in
> that case you can analyze the audio stream and decide if it is a
> commercial or a song/music.
>
> Did you check to see if there is already a Winamp plugin that would
> achieve this for you?
>
> Thanks,
> -Kartic
> 




From peter at engcorp.com  Sun Feb 27 11:22:39 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sun, 27 Feb 2005 11:22:39 -0500
Subject: Text To Speech with pyTTS
In-Reply-To: <4221b0b6$0$1998$afc38c87@news.optusnet.com.au>
References: <4221b0b6$0$1998$afc38c87@news.optusnet.com.au>
Message-ID: <p7mdnfGdItpSbrzfRVn-hw@powergate.ca>

Mike P. wrote:
> I was wondering if anyone has had any luck with the python text to speech
> (pyTTS) module available on Sourceforge:
> http://sourceforge.net/projects/uncassist

I saw the following blog entry by Joey deVilla:
http://farm.tucows.com/blog/Platforms/Windows/_archives/2005/1/19/266813.html

and immediately tried it out.  All I did was download the
PyTTS package for Python (2.4, not 2.3), and install it,
then ran Joey's sample above.  It worked as advertised.
This was on Windows XP SP2.

-Peter


From michele.simionato at gmail.com  Fri Feb 18 01:20:58 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 17 Feb 2005 22:20:58 -0800
Subject: low-end persistence strategies?
In-Reply-To: <mailman.2790.1108704152.22381.python-list@python.org>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<mailman.2735.1108616299.22381.python-list@python.org>
	<1108622622.119311.43200@f14g2000cwb.googlegroups.com>
	<mailman.2746.1108629315.22381.python-list@python.org>
	<1108629775.800508.3400@f14g2000cwb.googlegroups.com>
	<mailman.2777.1108674138.22381.python-list@python.org>
	<1108702957.327528.22010@z14g2000cwz.googlegroups.com>
	<mailman.2790.1108704152.22381.python-list@python.org>
Message-ID: <1108707658.105102.298300@z14g2000cwz.googlegroups.com>

Ok, I have yet another question: what is the difference
between fcntl.lockf  and fcntl.flock? The man page of
my Linux system says that flock is implemented independently
of fcntl, however it does not say if I should use it in preference
over fcntl or not.

        Michele Simionato



From mad.mick at gmx.de  Fri Feb  4 23:12:51 2005
From: mad.mick at gmx.de (Mick Krippendorf)
Date: Sat, 5 Feb 2005 05:12:51 +0100
Subject: returning True, False or None
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
	<6Z6dnVfTmdUDopnfRVn-1A@rcn.net>
Message-ID: <36iv03F4urakqU1@individual.net>

Fahri Basegmez wrote:
> reduce(lambda x, y: x or y, lst)

This doesn't solve the OPs problem since

 >>> reduce(lambda x, y: x or y, [False, None])

returns None instead of False.

Mick.



From simoninusa2001 at yahoo.co.uk  Tue Feb 22 00:36:37 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 21 Feb 2005 21:36:37 -0800
Subject: Considering python - have a few questions.
In-Reply-To: <1108417424.289500.85300@g14g2000cwa.googlegroups.com>
References: <eZAPd.21496$Ka6.148459@news1.mts.net>
	<1108417424.289500.85300@g14g2000cwa.googlegroups.com>
Message-ID: <1109050597.266659.137140@z14g2000cwz.googlegroups.com>

I'd go with a MySQL / Python / Apache route, but if it's Windows, maybe
not.

Also, you shouldn't store images in a database - images should be on
the filesystem with their paths stored in the database.

I'd definitely say going the web application route would be easier (and
more portable) than the GUI route, and a free Windows PyQt is still a
long way off, so stick with wxPython if you want a non-web GUI.



From donn at u.washington.edu  Mon Feb 14 19:08:31 2005
From: donn at u.washington.edu (Donn Cave)
Date: Mon, 14 Feb 2005 16:08:31 -0800
Subject: Kill GIL
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<86sm405d38.fsf@guru.mired.org> <cuospv$lfn$1@panix2.panix.com>
	<86y8dqixo6.fsf@guru.mired.org> <cur9q3$or$1@panix3.panix.com>
Message-ID: <donn-98901F.16083114022005@gnus01.u.washington.edu>

In article <cur9q3$or$1 at panix3.panix.com>, aahz at pythoncraft.com (Aahz) 
wrote:

> Yes.  I just get a bit irritated with some of the standard lines that
> people use.

Hey, stop me if you've heard this one:  "I used threads to solve
my problem - and now I have two problems!"

   Donn Cave, donn at u.washington.edu


From news at outbacklinux.com  Tue Feb 15 06:52:38 2005
From: news at outbacklinux.com (Adrian Casey)
Date: Tue, 15 Feb 2005 21:22:38 +0930
Subject: Kill GIL
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<86sm405d38.fsf@guru.mired.org> <cuospv$lfn$1@panix2.panix.com>
	<mailman.2502.1108343142.22381.python-list@python.org>
	<cup0p7$c9s$1@panix2.panix.com>
Message-ID: <4211e287@duster.adelaide.on.net>

Aahz wrote:

> In article <mailman.2502.1108343142.22381.python-list at python.org>,
> Frans Englich  <frans.englich at telia.com> wrote:
>>
>>Personally I need a solution which touches this discussion. I need to run
>>multiple processes, which I communicate with via stdin/out,
>>simultaneously, and my plan was to do this with threads. Any favorite
>>document pointers, common traps, or something else which could be good to
>>know?
> 
> Threads and forks tend to be problematic.  This is one case I'd recommend
> against threads.

Multiple threads interacting with stdin/stdout?  I've done it with 2 queues. 
One for feeding the threads input and one for them to use for output.  In
fact, using queues takes care of the serialization problems generally
associated with many threads trying to access a single resource (e.g.
stdout).  Python Queues are thread-safe so you don't have to worry about
such issues.


From dscottr at bellatlantic.net  Fri Feb 25 13:20:49 2005
From: dscottr at bellatlantic.net (Scott Robinson)
Date: Fri, 25 Feb 2005 18:20:49 GMT
Subject: Tuple index
References: <cvbcc6$b5f$1@news.netins.net>
	<1108951559.490554.305310@l41g2000cwc.googlegroups.com>
	<cvdian$ejs$1@news.netins.net> <zvOdneQkB6SyzoffRVn-jw@comcast.com>
	<cvdll3$f4u$1@news.netins.net>
	<1109023881.232830.183100@o13g2000cwo.googlegroups.com>
	<cvdnn3$eao$1@news.netins.net>
	<1109026865.523218.214010@g14g2000cwa.googlegroups.com>
Message-ID: <ggcv11dp0hoqsbd2226fdm88r39nrn0g44@4ax.com>

On 21 Feb 2005 15:01:05 -0800, "John Machin" <sjmachin at lexicon.net>
wrote:

>
>Steve M wrote:
>> John Machin wrote:
>>
>> >
>> > Steve M wrote:
>> >> I'm actually doing this as part of an exercise from a book. What
>the
>> > program
>> >> is supposed to do is be a word guessing game. The program
>automaticly
>> >> randomly selects a word from a tuple.
>> >
>> > Care to tell us which book is using a tuple for this, but hasn't
>got to
>> > lists yet?
>> >
>> > Cheers,
>> > John
>>
>> Python Programming for the absoulte beginner by Michael Dawson
>
>In a review I found on the web:
>http://www.skattabrain.com/css-books-plain/1592000738.html
>"Dawson will take you by the hand and lead you down the garden path."
>
>Malapropism? Intentional humour?

The book teaches you enough about programming and python to get you
programming.  It was the only python book in my local library so I
read it while trying to learn the basics of python.  It got me to the
point where I could comfortably write Fortran-style python (I am not
claiming that anyone else will leave the book that way, only that was
as far as I had progressed in understanding python).

I think that this book suggests using pickle/unpickle to send data
over the internet.  This is an amazingly bad idea, which is obvious
once you understand how overloading works (I'm pretty sure overloading
isn't covered in that book).

In short, I think that this book is a good introduction to
programming, and it will explain the basics of python, but it doesn't
really begin to explain how to program in python.

Scott Robinson



From steve at holdenweb.com  Thu Feb  3 15:45:42 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 03 Feb 2005 15:45:42 -0500
Subject: Why does super() require the class as the first argument?
In-Reply-To: <20050203140230680-0500@braeburn.themorgue.org>
References: <20050203140230680-0500@braeburn.themorgue.org>
Message-ID: <99wMd.102711$Jk5.10106@lakeread01>

Kevin Smith wrote:

> I like the idea of the super() function, but it doesn't seem to solve 
> the problem that I'm trying to fix.  I don't like hard-coding in calls 
> to super classes using their names:
> 
> class A(object):
>     def go(self):
>         ...
> 
> class B(A):
>     def go(self):
>         ...
>         A.go(self)
> 
> I don't like this because if I ever change the name of 'A', I have to go 
> through all of the methods and change the names there too.  super() has 
> the same problem, but I'm not sure why.  It seems like I should be able 
> to do:
> 
> class B(A):
>     def go(self):
>         ...
>         super(self).go()
> 
> I can create a super() that does this as follows:
> 
> _super = super
> def super(obj, cls=None):
>     if cls is None:
>         return _super(type(obj), obj)
>     return super(cls, obj)
> 
> I guess I'm just not sure why it wasn't done that way in the first place.
> 
You perhaps already know that super() searches the method resolution 
order (list of superclasses) to find a given class's superclass. 
However, in cases involving multiple inheritance (and specifically when 
subclassing two classes that have common ancestors) it's necessary to 
"flatten out" the inheritance tree.

The reason that super() takes a class as argument is because the 
superclass depends *not* on the class in which the method is defined, 
but on *the class of the instance calling the method*.

If we take the example from pp 89-90 of Python in a Nutshell you might 
understand. Consider these definitions:

class A(object):
   def met(self):
     print 'A.met'

class B(A):
   def met(self):
     print 'B.met'
     A.met(self)

class C(A):
   def met(self):
     print 'C.met'
     A.met(self)

class D(B,C):
   def met(self):
     print 'D.met'
     B.met(self)
     C.met(self)

d = D()
d.met()

Unfortunately this prints out

D.met
B.met
A.met
C.met
A.met

In other words, A.met is called by both its subclasses, which is usually 
not quite what you want. If we change the code to

class A(object): # mro: A, object
   def met(self):
     print 'A.met'

class B(A): # mro: B, A, object
   def met(self):
     print 'B.met'
     super(B, self).met()

class C(A): # mro: C, A, object
   def met(self):
     print 'C.met'
     super(C, self).met()

class D(B,C): # mro: D, B, C, A, object
   def met(self):
     print 'D.met'
     super(D, self).met()

d = D()
d.met()

This does indeed print

D.met
B.met
C.met
A.met

Why? The superobject (the object returned by super) has an mro which 
begins AFTER the first argument to super. This has the happy effect of 
changing the mro according to the class of self - super(X, self) is 
superobject, effectively an instance of a class distinguishable from 
self.__class__ only by  the fact that its mro is shorter, losing 
everything up to and including X.

Does this help at all? This is quite a subtle point, but it will repay 
study with an understanding of exactly how you can linearize your 
diamond-shaped inheritance graphs. Very pythonic ...

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From a.schmolck at gmx.net  Fri Feb 18 19:49:50 2005
From: a.schmolck at gmx.net (Alexander Schmolck)
Date: Sat, 19 Feb 2005 00:49:50 +0000
Subject: [ANN] mlabwrap v0.9b3
Message-ID: <mailman.2836.1108821105.22381.python-announce-list@python.org>

I have recently uploaded mlabwrap v0.9b3, a high-level python to matlab(tm)
bridge, you can get it from

<http://mlabwrap.sourceforge.net/>

It should work with recent python >=2.3 and matlab(tm) >=6.0; I've used it
extensively myself but this is the first announcement to a wider public -- so
I'd very much like to hear some feedback (even if it's just "works fine").

Here is a short demo snippet:

    >>> from mlabwrap import mlab
    >>> import Numeric
    >>> mlab.lookfor('singular value')
    GSVD   Generalized Singular Value Decompostion.
    SVD    Singular value decomposition.
    [...]
    >>> help(mlab.svd)
    mlab_command(*args, **kwargs)
     SVD    Singular value decomposition.
        [U,S,V] = SVD(X) produces a diagonal matrix S, of the same
        dimension as X and with nonnegative diagonal elements in
    [...]
    >>> mlab.svd(array([[1,2], [1,3]]))
    array([[ 3.86432845],
          [ 0.25877718]])

'as


From gabriel.cooper at mediapulse.com  Fri Feb  4 10:13:40 2005
From: gabriel.cooper at mediapulse.com (Gabriel Cooper)
Date: Fri, 04 Feb 2005 10:13:40 -0500
Subject: bytecode obfuscation
In-Reply-To: <1f060c4c05020313268582f6d@mail.gmail.com>
References: <1f060c4c05020313268582f6d@mail.gmail.com>
Message-ID: <42039124.1000105@mediapulse.com>



snacktime wrote:

>Also, I'm curious how much demand their is for this application in the
>Python world.  The application replaces online credit card
>processors(Verisign, Authorizenet) by providing a platform that
>connects directly to the bank networks for credit card processing, and
>also provides other features such as recurring billing, reporting,
>etc..  Everything except the libraries that actually connect to the
>bank networks would be open source, and those libraries aren't
>something that you would even want to touch anyways.
>  
>
Personally, I would avoid running any software that processed my users' 
credit cards that wasn't open source. Not to say I wouldn't use it, but 
it would have to come from a known-reliable source with their full 
backing to imply the security of their name. e.g. If it was a bytecode 
library downloadable directly from bankofamerica.com. The risk of 
devious programming is too high to bother. So I pay Verisign or 
Authorizenet one cent on the dollar. In exchange, my clients' identities 
aren't being stolen.

Hope this help,

Gabriel.


From kenneth.m.mcdonald at sbcglobal.net  Mon Feb 14 14:55:13 2005
From: kenneth.m.mcdonald at sbcglobal.net (Kenneth McDonald)
Date: Mon, 14 Feb 2005 19:55:13 GMT
Subject: DHTML control from Python?
Message-ID: <140220051355142173%kenneth.m.mcdonald@sbcglobal.net>

Are there any ways to use Python (rather than JavaScript) for controlling DHTML? I don't mind writing
JavaScript stubs which can be called by Python, so long as I need to do so only once for a particular
feature. I'm running Mac OS X 10.3, so comments as to the best browser for testing this would also be
appreciated.

If you could also email as well as posting a reply, I'd be grateful.

email to : kenneth.m.mcdonald _at_ sbcglobal.net

Thanks,
Ken McDonald


From jerf at jerf.org  Thu Feb 17 10:13:36 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 17 Feb 2005 10:13:36 -0500
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<37hqlrF59l2b2U1@individual.net>
	<873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<421450CC.9080504@swiftdsl.com.au>
	<87psyz8h9o.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<4214A800.4010509@swiftdsl.com.au>
Message-ID: <pan.2005.02.17.15.13.36.917107@jerf.org>

On Fri, 18 Feb 2005 01:19:44 +1100, news.sydney.pipenetworks.com wrote:
> Thanks for the pointer. Let's see how many zen points are for the OP's 
> idea vs against

Along with the fact that I agree with Nick that you've seriously
miscounted (most of your "fors" are simply irrelevant and I think you
added them to bolster your point, at least I *hope* you don't think they
are all relevant... for instance if you really think "Flat is better than
nested" applies here, you don't understand what that one is saying...),
I'd point out that the Zen that can be comprehended by checking off items
in a list is not the true Zen.


From http  Mon Feb 14 17:16:31 2005
From: http (Paul Rubin)
Date: 14 Feb 2005 14:16:31 -0800
Subject: is there a safe marshaler?
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<1108051828.483222.62670@z14g2000cwz.googlegroups.com>
	<7xmzu6q4cv.fsf@ruckus.brouhaha.com>
	<4211185b$0$28982$e4fe514c@news.xs4all.nl>
Message-ID: <7xbramzt1c.fsf@ruckus.brouhaha.com>

Irmen de Jong <irmen.NOSPAM at xs4all.nl> writes:
> > There's another issue with marshal that makes it unsuitable for Pyro,
> > which is that its data format is (for legitimate reasons) not
> > guaranteed to be the same across different Python releases.  That
> > means that if the two ends of the Pyro application aren't using the
> > same Python version, they might not be able to interoperate.
> 
> Paul, the default serialization protocol that Pyro uses is pickle
> (with the highest available protocol number). So there is a risk
> already that it doesn't interoperate with older Python versions,
> unless you configure the max pickle protocol or switch to using
> one of the supported XML serializations.

Yes, however, you can at least set the protocol level.  Marshal doesn't
give you that option.

What do you do about the security issue if you're using pickle?  Do
you have to trust the other end to not send you malicious pickles?


From alexandre.tp at gmail.com  Sat Feb 12 17:59:01 2005
From: alexandre.tp at gmail.com (top)
Date: 12 Feb 2005 14:59:01 -0800
Subject: Assigning to self
References: <mailman.805.1105987092.22381.python-list@python.org>
	<10uo6hbn040qt24@news.supernews.com>
	<mailman.816.1105995336.22381.python-list@python.org>
	<pan.2005.01.18.18.52.57.528558@gmx.net>
	<10ur80gf6utag00@corp.supernews.com>
Message-ID: <1108249141.239243.153800@c13g2000cwb.googlegroups.com>

Jeff Shannon wrote:
> class __Foo:
>      "I am a singleton!"
>      pass
>
> def Foo(foo_obj = __Foo()):
>      assert isinstance(foo_obj, __Foo
>      return foo_obj
this is a bit simpler, I think, and takes advantage from Python's free
name-rebinding.

class Singleton(object):
    def __call__(self):
        return self
Singleton = Singleton()

And, now, every time you say obj = Singleton(), you're getting the same
instance. Of course, this corrupt the __call__ method of the class, and
isn't inheritance-safe at all, but if you want only one or two classes
like this, it isn't very much work to implement it. Also, it's free of
weird metaclasses, __new__s, or __dict__ hacks, I think.
Just putting my two-cents into this,
--
 - Alexandre



From jeff at ccvcorp.com  Fri Feb  4 19:00:04 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Fri, 04 Feb 2005 16:00:04 -0800
Subject: [noob] Error!
In-Reply-To: <614c778e.0502041459.39da55c1@posting.google.com>
References: <614c778e.0502041459.39da55c1@posting.google.com>
Message-ID: <110832ml3eim08b@corp.supernews.com>

administrata wrote:

> Write a Car Salesman program [...]

This sounds like homework, and we generally try to avoid solving 
peoples' homework problems for them, but I can offer a suggestion.

> error occurs, i think the problem is in actual_price. but,
> I don't know how to comebine percentage and raw_input.
> help me...

It's hard to be sure since you don't say what the error is, nor 
anything about what you expect to see and what you actually see.

However, if you're pretty sure that the problem is the line where you 
calculate actual_price, then fire up an interactive interpreter and 
try fiddling with things.  You've got a lot of subexpressions there; 
pick some values and try each subexpression, one at a time, and take a 
look at what you get.

I bet that it won't take you long to figure out why you're not getting 
the result you expect.

Jeff Shannon
Technician/Programmer
Credit International



From tom.willis at gmail.com  Tue Feb 22 11:12:01 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Tue, 22 Feb 2005 11:12:01 -0500
Subject: searching pdf files for certain info
In-Reply-To: <cvfk26$qb3$1@solaris.cc.vt.edu>
References: <cvfdgg$fr0$1@solaris.cc.vt.edu> <cvfg5a$6g6$1@news.mch.sbs.de>
	<cvfhe5$lcv$1@solaris.cc.vt.edu> <cvfi2q$dto$1@news.mch.sbs.de>
	<cvfk26$qb3$1@solaris.cc.vt.edu>
Message-ID: <b54d048905022208123a4ab55a@mail.gmail.com>

I tried that for something not python related and I was getting
sporadic spaces everywhere.

I am assuming this is not the case in your experience?


On Tue, 22 Feb 2005 10:45:09 -0500, rbt <rbt at athop1.ath.vt.edu> wrote:
> Andreas Lobinger wrote:
> > Aloha,
> >
> > rbt wrote:
> >
> >> Thanks guys... what if I convert it to PS via printing it to a file or
> >> something? Would that make it easier to work with?
> >
> >
> > Not really...
> > The classical PS Drivers (f.e. Acroread4-Unix print-> ps) simply
> > define the pdf graphics and text operators as PS commands and
> > copy the pdf content directly.
> >
> > Wishing a happy day
> >     LOBI
> 
> I downloaded ghostscript for Win32 and added it to my PATH
> (C:\gs\gs8.15\lib AND C:\gs\gs8.15\bin). I found that ps2ascii works
> well on PDF files and it's entirely free.
> 
> Usage:
> 
> ps2ascii PDF_file.pdf > ASCII_file.txt
> 
> However, bundling a 9+ MB package with a 5K script and convincing users
> to install it is another matter altogether.
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
Thomas G. Willis
http://paperbackmusic.net


From cam.ac.uk at mh391.invalid  Wed Feb 16 06:49:38 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Wed, 16 Feb 2005 11:49:38 +0000
Subject: [perl-python] problem: reducing comparison
In-Reply-To: <1108450348.253772.158120@z14g2000cwz.googlegroups.com>
References: <1108450348.253772.158120@z14g2000cwz.googlegroups.com>
Message-ID: <cuvc0l$45v$1@gemini.csx.cam.ac.uk>

Xah Lee wrote:
> attached below is the Perl documentation that i wrote for a function
> called "reduce", which is really the heart of a larger software.

Don't shadow built-ins. Especially for a function name.
-- 
Michael Hoffman


From Serge.Orlov at gmail.com  Fri Feb 25 08:11:54 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: 25 Feb 2005 05:11:54 -0800
Subject: auto-completion history
In-Reply-To: <c4b57fd0.0502250129.16099d7f@posting.google.com>
References: <c4b57fd0.0502250129.16099d7f@posting.google.com>
Message-ID: <1109337114.660916.189340@o13g2000cwo.googlegroups.com>

porterboy wrote:
> Hi Folks,
>
> I have auto-completion set up in my python interpreter so that if I
> hit the tab key it will complete a variable or a python command*. eg.
> if I type
> >>> imp
> and if I then hit the tab key, the interpreter will complete it to...
> >>> import
>
> Now, I also use Matlab at the command line a lot and it has a nice
> additional auto-completion feature, whereby, if you type a few
> letters and hit the up-arrow, it will go back to the last command
> you typed > that began with those letters. If you keep hitting
> up-arrow it will cycle through all the commands you typed beginning
> with these letters. eg. if I type...
>
> Does a feature like this already exist in python???

It's not in python, it's in readline library. To read the documentation
do 'man readline'

readline.parse_and_bind('"\e[A": history-search-backward')

works for me. To find out what your up arrow key sends remove
\e[A and hit on your keyboard Control-v and then up arrow.

  Serge.



From harlinseritt at yahoo.com  Thu Feb 10 17:41:17 2005
From: harlinseritt at yahoo.com (Harlin)
Date: 10 Feb 2005 14:41:17 -0800
Subject: goto, cls, wait commands
In-Reply-To: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
Message-ID: <1108075277.078837.106170@o13g2000cwo.googlegroups.com>

No goto needed. If this makes no sense (which it may not if all you've
been exposed to is BASIC) it wouldn't be a bad idea to Google why you
should never use a goto statement.

To do a clear screen you'll need to use the method that your command
shell uses. The shortcut to this is for Windows, 'cls' and Linux (and
other Unix derivatives) is 'clear'. To put this into your programs
you'll need to import the OS module. Then use the method, system() to
run the command:

import os
os.system('cls')

or

os.system('clear')

To do a 'wait' you can use the Time module.

import time

seconds = 10      #This is an integer value
time.sleep(seconds)

Only on Unix systems can you use the system command 'sleep'. However,
in the name of portability it's better to use the Python modules
whenever possible (they'll work on any system that supports Python).

Hope it helps.

Harlin



From dontwant at spam.com  Thu Feb 10 18:06:10 2005
From: dontwant at spam.com (Courageous)
Date: Thu, 10 Feb 2005 15:06:10 -0800
Subject: Python v.s. c++
References: <mailman.2331.1108060722.22381.python-list@python.org>
	<420BE10C.5090407@swiftdsl.com.au>
Message-ID: <mvpn015lbpp67u49aimddvud3fg35cdsjr@4ax.com>


>Joking aside, you will love python and is well worth it since you can 
>still use your c++ skills.

<quote-of-the-day-mode>

If a program is fine art, Python is my medium, upon which I paint my
imagination, without any thought of the canvas before me.

</qotdm>

C//



From donn at u.washington.edu  Mon Feb 14 12:31:09 2005
From: donn at u.washington.edu (Donn Cave)
Date: Mon, 14 Feb 2005 09:31:09 -0800
Subject: Kill GIL
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<cum62t$3fb$1@panix2.panix.com>
	<mailman.2463.1108256227.22381.python-list@python.org>
	<868y5t6sal.fsf@guru.mired.org> <cumoue$9ur$1@panix2.panix.com>
	<86sm405d38.fsf@guru.mired.org>
	<mailman.2508.1108351865.22381.python-list@python.org>
	<1108358757.577366@yasure>
	<mailman.2531.1108389225.22381.python-list@python.org>
Message-ID: <donn-0FAF40.09310914022005@gnus01.u.washington.edu>

In article <mailman.2531.1108389225.22381.python-list at python.org>,
 Dave Brueck <dave at pythonapocrypha.com> wrote:
> Donn Cave wrote:
[... re stackless inside-out event loop ]
> > I put that together with real OS threads once, where the I/O loop was a
> > message queue instead of select.  A message queueing multi-threaded
> > architecture can end up just as much a state transition game.  
> 
> Definitely, but for many cases it does not - having each thread represent a 
> distinct "worker" that pops some item of work off one queue, processes it, 
> and 
> puts it on another queue can really simplify things. Often this maps to 
> real-world objects quite well, additional steps can be inserted or removed 
> easily (and dynamically), and each worker can be developed, tested, and 
> debugged 
> independently.

Well, one of the things that makes the world interesting is
how many different universes we seem to be coming from, but
in mine, when I have divided an application into several
thread components, about the second time I need to send a
message from one thread to another, the sender needs something
back in return, as in T2 = from_thread_B(T1).  At this point,
our conventional procedural model breaks up along a state fault,
so to speak, like

       ...
       to_thread_B(T1)
       return

    def continue_from_T1(T1, T2):
       ...

So, yeah, now I have a model where each thread pops, processes
and pushes messages, but only because my program spent the night
in Procrustes' inn, not because it was a natural way to write
the computation.  In a procedural language, anyway - there are
interesting alternatives, in particular a functional language
called O'Haskell that models threads in a "reactive object"
construct, an odd but elegant mix of state machine and pure
functional programming, but it's kind of a research project
and I know of nothing along these lines that's really supported
today.

   Donn Cave, donn at u.washington.edu


From grante at visi.com  Tue Feb  1 13:46:35 2005
From: grante at visi.com (Grant Edwards)
Date: 01 Feb 2005 18:46:35 GMT
Subject: Where are list methods documented?
References: <41ffba7d$0$15879$a1866201@visi.com>
	<mailman.1702.1107279469.22381.python-list@python.org>
	<41ffc37a$0$15874$a1866201@visi.com>
	<mailman.1704.1107282139.22381.python-list@python.org>
Message-ID: <41ffce8b$0$15868$a1866201@visi.com>

On 2005-02-01, Tim Peters <tim.peters at gmail.com> wrote:

> [Grant Edwards]
>> I did.  I looked up sort in the library index, and it took me
>> to 3.3.5 Emulating container types,
>
> It doesn't for me.  Here:
>
>     http://docs.python.org/lib/genindex.html#letter-s
>
> There are two entries for "sort":
>
>     sort (IMAP4_stream method)
>     sort (list method)
>
> You're looking for the second one <wink>.

Aargh.  My bad. I was in the language reference index.  I seem
to have a very hard time ending up in the document I'm trying
for.  For some reason, I fairly consistently click on the wrong
link in the document index. :(

-- 
Grant Edwards                   grante             Yow!  I'm definitely not
                                  at               in Omaha!
                               visi.com            


From sjmachin at lexicon.net  Sat Feb 19 00:57:59 2005
From: sjmachin at lexicon.net (John Machin)
Date: 18 Feb 2005 21:57:59 -0800
Subject: exercise: partition a list by equivalence
In-Reply-To: <mailman.2822.1108782900.22381.python-list@python.org>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<mailman.2803.1108743668.22381.python-list@python.org>
	<1108768870.455974.244590@c13g2000cwb.googlegroups.com>
	<mailman.2819.1108771744.22381.python-list@python.org>
	<1108774366.122896.293720@l41g2000cwc.googlegroups.com>
	<mailman.2822.1108782900.22381.python-list@python.org>
Message-ID: <1108792679.403090.220050@o13g2000cwo.googlegroups.com>


John Lenton wrote:
> On Fri, Feb 18, 2005 at 04:52:46PM -0800, John Machin wrote:
> > > > needs "if rev[first] == rev[second]: continue" here
> > >
> > > an 'is' is enough, and better.
> >
> > Good point. You're redeeming yourself :-)
>
> this, together with you saying that it is hard to explain, makes me
> think that you aren't comfortable thinking of lists as mutable
> objects.

How so? There is no connection between is/== and mutability. Let me
amplify: The point about 'is' is a good one, and aids your redemption
after your failure to have adequate guards caused your algorithm not to
work.

>
>
> > > what is magic about it? is it really that horrible?
> >
> > Try explaining to the newbies over on the tutor list how despite
"res"
> > only ever *explicitly* having little bits like [3, 4] appended to
it,
> > it (or more properly the thing to which it refers) is actually
> > festering and growing and being mutated under the surface until at
the
> > finale it bursts out dripping slime just like the creature from the
> > black lagoon ...
>
> understanding why that works, and why it is 'is' and not '==', are
> both part of the same thing.

What same thing is that?

> Lists are mutable, and you can mutate
> them, and they mutate. Unless you actually write code that uses the
> fact you will forget it, and it will bite you. Of course, don't use
it
> just for the heck of it, but that creature you dismiss as a
> slime-dripping mutation is actually quite useful.

You are confusing mutability of lists (without which they would be
called tuples!) with my point that the 'res' list was having its
contents fiddled with implicitly through other "pointers".

>
> While I'm at being unpolite, do you really think this code was harder
> to understand than the code posted by anton, using numarray?

I only read it as far as the bit where it creating a matrix of size
O(N**2) -- in my app N can be over a million so I lost interest
rapidly.

>
> And, of course, if this code were for anything non-throw-awayable,
> there would've been quite a bit of explaining going on between those
> lines of code.
>
Not of course, but of necessity.

> Ok, now back to being polite :)

Welcome back.



From stefan.behnel-n05pAM at web.de  Mon Feb 14 04:59:57 2005
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Mon, 14 Feb 2005 10:59:57 +0100
Subject: [PATCH] allow partial replace in string.Template
Message-ID: <cuq0dl$opq$1@lnx107.hrz.tu-darmstadt.de>

Hi!

Here's a trivial patch against Lib/string.py that adds two new methods. The 
first replaces the template by a partially resolved substitution and the 
second creates a new, partially substituted template. I find those two useful 
enough for integration in the stdlib, especially the replacing one is very 
useful when pre-replacing some placeholders outside of string generation loops 
or when building a string from a template step by step.

Maybe the method names need some discussion. Also, the creation of a new 
Template does not handle sub-classes. I didn't know the best was to do this. 
Use type(self)? That doesn't necessarily mean the constructor of that type 
takes the same arguments...

Any comments?

Stefan


--- Lib/string.py~      2004-11-01 04:52:43.000000000 +0100
+++ Lib/string.py       2005-02-14 10:41:41.000000000 +0100
@@ -145,6 +145,12 @@
          raise ValueError('Invalid placeholder in string: line %d, col %d' %
                           (lineno, colno))

+    def partial_replace(self, *args, **kwargs):
+        self.template = self.safe_substitute(*args, **kwargs)
+
+    def partial_substitute(self, *args, **kwargs):
+        return Template( self.safe_substitute(*args, **kwargs) )
+
      def substitute(self, *args, **kws):
          if len(args) > 1:
              raise TypeError('Too many positional arguments')
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From fperez.net at gmail.com  Fri Feb  4 18:06:51 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Fri, 04 Feb 2005 16:06:51 -0700
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot><1107487113.732375.110850@c13g2000cwb.googlegroups.com><opslnmywarej1m1c@ashot><mailman.1865.1107491434.22381.python-list@python.org><opsln54fpwej1m1c@ashot>
	<36hculF51ho2sU1@individual.net><1107530489.308497.103530@g14g2000cwa.googlegroups.com><36hrjpF4ui8fbU1@individual.net>
	<mailman.1911.1107546744.22381.python-list@python.org>
	<36i84qF52ce29U1@individual.net> <opslo127s7ej1m1c@ashot>
	<cu0umf$cja$1@sea.gmane.org>
Message-ID: <cu0v4q$dtm$1@sea.gmane.org>

Fernando Perez wrote:

> Hi folks,
> 
> could you please test under windows the 1.9 version of readline?
> 
>
http://sourceforge.net/project/showfiles.php?group_id=82407&package_id=84552&release_id=302513
> 
> This was just put up a moment ago by the developer, let me know if it fixes
> these problems.

Never mind.  He contacted me briefly after I wrote this, with the following
info:

####################################

I just checked. The new version does not fix that problem. The code as 
released does not handle backgrounds other than black. Folks should run 
with a black background for now.

####################################

So for now, I'm sorry to say this but under win32, ipython users should stick
to dark backgrounds.  I'll post a note here when the readline developer has a
chance to work on this problem.

Regards,

f



From cjw at sympatico.ca  Wed Feb  9 09:25:02 2005
From: cjw at sympatico.ca (Colin J. Williams)
Date: Wed, 09 Feb 2005 09:25:02 -0500
Subject: Definitive documentation on newstyle classes? (WAS: Pickling
 and inheritance are making me hurt)
In-Reply-To: <1107925915.042588.43000@c13g2000cwb.googlegroups.com>
References: <1d6cdae305020516467620aa0@mail.gmail.com>
	<mailman.2002.1107653711.22381.python-list@python.org>
	<4208FBFD.6000303@sympatico.ca>
	<1107925915.042588.43000@c13g2000cwb.googlegroups.com>
Message-ID: <420A1D3E.5080407@sympatico.ca>

Michele Simionato wrote:
>>It would be good to have a clear exposition of the pros and cons of
>>__new__ usage.
> 
> 
> It is there mostly because __init__ would not work on immutable types.
> OTOH, you probably do not want to use __new__ on mutable types
> (once I was caught by this trap, google for "overriding list.__new__"
> if you are interested).
>  
>    Michele Simionato
> 
Thanks.  The use of __new__ for immutable classes is described in:
          http://www.python.org/2.2.3/descrintro.html

This distinction hadn't registered with me before.

The Martelli bible doesn't bring this out.

It seems to me that __new__ should probably be deprecated for mutable 
classes.

Colin W.


From mensanator at aol.com  Sat Feb  5 17:40:44 2005
From: mensanator at aol.com (mensanator at aol.com)
Date: 5 Feb 2005 14:40:44 -0800
Subject: sos!
In-Reply-To: <StKdnVdY3-KK2pjfRVn-uw@rogers.com>
References: <6d2e4eef.0502050342.d8744cb@posting.google.com>
	<StKdnVdY3-KK2pjfRVn-uw@rogers.com>
Message-ID: <1107643244.510478.261130@o13g2000cwo.googlegroups.com>


Dan Perl wrote:
> "jordan2856977" <jordan2856977 at 163.com> wrote in message
> news:6d2e4eef.0502050342.d8744cb at posting.google.com...
> > hellow everybody! I'm from china. I'm a beginner of python. in
china,
> > python is not a fashionable language, so it's difficult to find
some
> > books about python. finally,I find a book named "python how to
> > program" wrote by H.M.Deitel . who can tell me where can I find
some
> > interesting source code about python. otherwise, I will fell boring
> > about study!
>
> The Python Cookbook is a good source of examples that other posters
haven't
> mentioned yet: http://aspn.activestate.com/ASPN/Cookbook/Python/
>
> It is especially good because it contains simple, short recipes that
> illustrate a specific use of python and these recipes are organized
in 
> categories.
> 
> Dan

Aren't you in the wrong newsgroup? :-)



From beliavsky at aol.com  Mon Feb  7 23:13:30 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 7 Feb 2005 20:13:30 -0800
Subject: Is Python as capable as Perl for sysadmin work?
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
Message-ID: <1107836010.646355.99020@z14g2000cwz.googlegroups.com>


John M. Gabriele wrote:
> I recently posted this sort of question to the c.l.p.m but
> didn't get much of a response. I know a little Perl and a
> little Python, but master neither at the moment.
>
> I see that Python is a general purpose OO programming language
> that finds use among some system administrators, but my guess
> is that Perl is still more common in that area than Python.
>
> For sysadmin-related tasks, is Python as useful as Perl, or
> does it get clumsy when often dealing with the stuff admins
> deal with on a regular basis?

I'm a Windows user, not a Unix sysadmin, but I've noticed that
Cameron Laird has written several articles on Python for system
administration in Unix Review and Sys Admin magazine, for example
http://www.unixreview.com/documents/s=9083/sam0401d/ . Reading his
articles may help you decide if Python is a good fit for your work.



From exogen at gmail.com  Sun Feb 13 17:52:25 2005
From: exogen at gmail.com (Brian Beck)
Date: Sun, 13 Feb 2005 17:52:25 -0500
Subject: builtin functions for and and or?
In-Reply-To: <37a2i0F58gsbsU1@individual.net>
References: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>
	<37a2i0F58gsbsU1@individual.net>
Message-ID: <cuolss$nh1$1@eeyore.INS.cwru.edu>

George Sakkis wrote:
> You're right, it doesn't short circuit, as most of the examples posted above. Here's one that it
> does:
> 
> ...

I also looked into taking advantage of itertools' dropwhile, but the all 
and any recipes included in the itertools documentation do short-circuit 
and don't require the setup of a try/except/else.

--
Brian Beck
Adventurer of the First Order


From mahs at telcopartners.com  Tue Feb  8 14:15:20 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Tue, 08 Feb 2005 11:15:20 -0800
Subject: turing machine in an LC
In-Reply-To: <pan.2005.02.08.13.41.41.716411@jerf.org>
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>	<87mzuf9gu8.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>	<s9zvf93ovp8.fsf@salmakis.intevation.de>	<pan.2005.02.08.12.47.00.135408@jerf.org>	<mailman.2205.1107887101.22381.python-list@python.org>
	<pan.2005.02.08.13.41.41.716411@jerf.org>
Message-ID: <cub2tp$m93$1@sea.gmane.org>

Jeremy Bowers wrote:

> 
> That's not a generator expression, that's a generator function. Nobody
> contests they can reference earlier states, that's most of their point :-)
> 


Are you sure?

I just wrote my examples in functions to label them

Here's your example with this method:
  >>> import itertools as it
  >>> results = [0]
  >>> magicGenerator = (i+1 for i,lastresult in it.izip(xrange(5),results))
  >>> results.extend(magicGenerator)
  >>> results
[0, 1, 2, 3, 4, 5]
  >>>

 > For context, we're trying to build Turing Completeness into Python without
 > indentation. I bailed out of a Xah Lee thread because people have
 > probably killed it :-)
Didn't see it, but this looked interesting - presumably your point
and this is entirely unrelated by now, except in
 > the vague sense he started with an (I'm sure entirely accidentally)
 > thought-provoking question.

Michael



From pipedreamergrey at gmail.com  Wed Feb 16 20:38:39 2005
From: pipedreamergrey at gmail.com (pipedreamergrey at gmail.com)
Date: 16 Feb 2005 17:38:39 -0800
Subject: PythonCard and Py2Exe
In-Reply-To: <acq57pnf.fsf@python.net>
References: <1108476282.790371.155670@l41g2000cwc.googlegroups.com>
	<mailman.2620.1108476543.22381.python-list@python.org>
	<1108484617.908022.280320@l41g2000cwc.googlegroups.com>
	<acq57pnf.fsf@python.net>
Message-ID: <1108604319.052270.170430@l41g2000cwc.googlegroups.com>

> You should move these 'import ...' statements to your *script* so
that
> py2exe doesn find them, not to the setup script.
>
> Thomas

Removing import statements only returns this error message before the
package compiles:

= "custdb",
'setup' is not defined


No files are returned.



From rnd at onego.ru  Mon Feb 21 15:56:50 2005
From: rnd at onego.ru (Roman Suzi)
Date: Mon, 21 Feb 2005 23:56:50 +0300 (MSK)
Subject: Bug in email package?
In-Reply-To: <EtKdnQe9w542qoTfRVn-pw@comcast.com>
References: <mailman.2876.1108934604.22381.python-list@python.org>
	<KKOdnSNVU7_HroTfRVn-3w@speakeasy.net>
	<EtKdnQe9w542qoTfRVn-pw@comcast.com>
Message-ID: <Pine.LNX.4.62.0502212354150.4563@rnd.onego.ru>

On Sun, 20 Feb 2005, Steven Bethard wrote:

> Erik Max Francis wrote:
>> Roman Suzi wrote:
>> 
>>> I think that if any object (from standard library at least) doesn't support
>>> iteration, it should clearly state so.
>>> 
>>> My guess is that 'for' causes the use of 'm[0]', which is (rightfully) an 
>>> error...
>>> 
>>> Can this behaviour of email be considered a bug?
>>> Is there a good case to iterate over something useful in a message
>> 
>> Why would it be a bug if the documentation never stated that the object was 
>> iterable?
>
> I think the bug is not that an error is produced, but that the _wrong_ error 
> is produced.  Trying to iterate over something that is not iterable should

Well, that was what I meant.

> produce a TypeError saying so (not an Attribute error):
>
> py> class C(object):
> ... 	pass
> ...
> py> iter(C())
> Traceback (most recent call last):
>  File "<interactive input>", line 1, in ?
> TypeError: iteration over non-sequence
>
> I've actually seen something like this come up before (I think with 
> email.Message even...)  I say call it a bug and submit a patch.

Ok. A bug minute on the next bug day ;-)

> It's pretty 
> easy to fix -- just add an __iter__ method to Message that raises a TypeError. 
> That makes it clear that Message doesn't intend to support the getitem 
> protocol -- it just does so accidentally because it provides __getitem__.
>
> STeVe
>

Sincerely yours, Roman Suzi
-- 
rnd at onego.ru =\= My AI powered by GNU/Linux RedHat 7.3


From rvm_1380 at yahoo.com  Sun Feb  6 05:29:06 2005
From: rvm_1380 at yahoo.com (rozita raissi)
Date: Sun, 6 Feb 2005 10:29:06 +0000 (GMT)
Subject: Download a file from FTP server to local machine
Message-ID: <20050206102906.39108.qmail@web60208.mail.yahoo.com>

Hello,
 
I'm writing an ftp client script which must run in explorer. My script must be placed on and run from a web server. User can connect through it to a FTP server. If user requests to download a file from FTP server, file is downloaded to web server on which my script is running. How can I transfere downloaded file from web server to client local machine?
 
Regards.



---------------------------------
  Yahoo! Messenger - Communicate instantly..."Ping" your friends today! Download Messenger Now
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From steven.bethard at gmail.com  Thu Feb  3 16:31:11 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 03 Feb 2005 14:31:11 -0700
Subject: remove duplicates from list *preserving order*
In-Reply-To: <1107464751.891049.45580@c13g2000cwb.googlegroups.com>
References: <BfmdnTjWquaJEZ_fRVn-3A@comcast.com>
	<1107464751.891049.45580@c13g2000cwb.googlegroups.com>
Message-ID: <FOidnegWIauDBZ_fRVn-jw@comcast.com>

Carl Banks wrote:
> from itertools import *
> [ x for (x,s) in izip(iterable,repeat(set()))
>   if (x not in s,s.add(x))[0] ]

Wow, that's evil!  Pretty cool, but for the sake of readers of my code, 
I think I'll have to opt against it. ;)

STeVe


From hanche at math.ntnu.no  Sat Feb 26 12:58:18 2005
From: hanche at math.ntnu.no (Harald Hanche-Olsen)
Date: 26 Feb 2005 18:58:18 +0100
Subject: Whither datetime.date ?
Message-ID: <pcomztr9pad.fsf@shuttle.math.ntnu.no>

I'm confused.  I was going to try linkchecker, and it dies with a
traceback ending in

  File "/usr/local/lib/python2.4/calendar.py", line 32, in _localized_month
    _months = [datetime.date(2001, i+1, 1).strftime for i in range(12)]
AttributeError: 'module' object has no attribute 'date'

Sure enough, there is no datetime.date, but there is a datetime.Date:

Python 2.4 (#2, Feb 19 2005, 20:35:23)
[GCC 3.4.2 [FreeBSD] 20040728] on freebsd5
Type "help", "copyright", "credits" or "license" for more information.
>>> import datetime
>>> dir(datetime)
['Date', 'DateTime', ...]

However, the Library Reference clearly states that datetime.date
should exist.  Granted, it's been a while since I used python in
anger, but isn't this what it says?

  http://www.python.org/doc/2.4/lib/node243.html
  http://www.python.org/doc/2.4/lib/datetime-date.html

Moreover, the datetime.date class is supposed to have a strftime()
method.  datetime.Date does not.

I'm beginning to wonder if the FreeBSD python package is at fault.

Or what is really going on here?

-- 
* Harald Hanche-Olsen     <URL:http://www.math.ntnu.no/~hanche/>
- Debating gives most of us much more psychological satisfaction
  than thinking does: but it deprives us of whatever chance there is
  of getting closer to the truth.  -- C.P. Snow


From fredrik at pythonware.com  Tue Feb  8 09:19:45 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 15:19:45 +0100
Subject: Big development in the GUI realm
References: <200502072347.j17NlPnh012281@mail07.syd.optusnet.com.au><cu9v2s$5eq$1@sea.gmane.org>
	<4208C195.1000104@optushome.com.au>
Message-ID: <cuahne$sje$1@sea.gmane.org>

Tim Churches wrote:

>>except that if *you* set things up so the code is combined when run, *you* are
>>copying, distributing, and/or modifying the program in order to mix, include and/or
>>combine your work with the GPL:ed work.
>>
>>if you leave all that to the user, you're clear.
>>
> Yes, that is what I, and others, have been saying, and doing, all along. Our Mozilla Public 
> Licensed Python application imports (but contains no code from) a GPLed third-party Python module 
> at runtime, but we don't distribute that module, we just tell users to obtain it independently and 
> install it on their systems.

does your program work (in any way) without this module?

>>(relying on word games is a lousy legal strategy in most parts of the world)
>>
> (Gee, I thought that word games were the entire basis of much legal endeavour in most parts of the 
> world. Patent specifications in particular spring to mind.)

yeah, but you shouldn't base your entire game on a specific word play.

</F> 





From fortepianissimo at gmail.com  Sat Feb  5 17:37:00 2005
From: fortepianissimo at gmail.com (fortepianissimo)
Date: 5 Feb 2005 14:37:00 -0800
Subject: Computing class variable on demand?
In-Reply-To: <YfCdnf0-fb26NJ7fRVn-3g@comcast.com>
References: <1107410898.260491.203090@l41g2000cwc.googlegroups.com>
	<6eydnSAjiuofW5zfRVn-sw@comcast.com>
	<1107445682.239962.284660@o13g2000cwo.googlegroups.com>
	<mY2dnU6Tjq1e-5_fRVn-hg@comcast.com>
	<1107501071.325170.168620@z14g2000cwz.googlegroups.com>
	<YfCdnf0-fb26NJ7fRVn-3g@comcast.com>
Message-ID: <1107643020.261275.207690@z14g2000cwz.googlegroups.com>

Thanks Steve - actually my question was simpler than that. I just
wanted to use Daniels' recipe of lazy initialization on objects with
__slots__:

class Lazy(object):
    def __init__(self, calculate_function):
        self._calculate = calculate_function

    def __get__(self, obj, _=None):
        if obj is None:
            return self
        value = self._calculate(obj)
        setattr(obj, self._calculate.func_name, value)
        return value


class SomeClass(object):

    __slots__ = 'someprop'

    @Lazy
    def someprop(self):
        print 'Actually calculating value'
        return 13


o = SomeClass()
print o.someprop
print o.someprop



Running the code above will produce:

Actually calculating value
Traceback (most recent call last):
  File "Lazy.py", line 26, in ?
    print o.someprop
  File "Lazy.py", line 11, in __get__
    setattr(obj, self._calculate.func_name, value)
AttributeError: 'SomeClass' object attribute 'someprop' is read-only


Removing the __slots__ statement, everything would run normally.

Is there any workaround?



From kartic.krishnamurthy at gmail.com  Fri Feb  4 11:20:38 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 4 Feb 2005 08:20:38 -0800
Subject: Thread in python
In-Reply-To: <1107533540.641969.191940@z14g2000cwz.googlegroups.com>
References: <1107533540.641969.191940@z14g2000cwz.googlegroups.com>
Message-ID: <1107534038.823409.89650@l41g2000cwc.googlegroups.com>

ajikoe at gmail.com wrote:
> Hello, is any one knows websites which give a python thread tutorial
?
>
> Sincerely Yours,
> Pujo Aji

Pujo Aji,

I have not come across a tutorial but found this link rather helpful -
http://www.faqts.com/knowledge_base/index.phtml/fid/263 - to get
started.

Also, there are good recipes in ASPN -
http://aspn.activestate.com/ASPN/Cookbook/Python?kwd=Threads

And last but not least, the chapter on Threads in Python Standard
Library by Fredrik Lundh - http://effbot.org/zone/books.htm

Thanks,
-Kartic



From kent37 at tds.net  Wed Feb 23 23:51:26 2005
From: kent37 at tds.net (Kent Johnson)
Date: Wed, 23 Feb 2005 23:51:26 -0500
Subject: Source Encoding GBK/GB2312
In-Reply-To: <1109217736.643721.201240@o13g2000cwo.googlegroups.com>
References: <1109217736.643721.201240@o13g2000cwo.googlegroups.com>
Message-ID: <421d5a29$1_3@newspeer2.tds.net>

steven at lczmsoft.com wrote:
> When I specify an source encoding such as:
> 
> # -*- coding: GBK -*-
> or
> # -*- coding: GB2312 -*-
> 
> as the first line of source, I got the following error:
> 
> SyntaxError: 'unknown encoding: GBK'
> 
> 
> Does this mean Python does not support GBK/GB2312?  What do I do?

GB2312 is supported in Python 2.4.
GB2312 support can be added to Python 2.3 with the CJKCodecs package:
http://cjkpython.i18n.org/

Kent

> 
> -
> narke
> 


From dial#####$$NOSPAM##$#$## at gmail.com  Thu Feb 24 17:38:33 2005
From: dial#####$$NOSPAM##$#$## at gmail.com (Valentino Volonghi aka Dialtone)
Date: Thu, 24 Feb 2005 23:38:33 +0100
Subject: Python and "Ajax technology collaboration"
References: <1109193970.029421.213490@l41g2000cwc.googlegroups.com>
	<opsmn8bcnw6yt6e7@news.cisco.com>
	<1gsgn7j.1sr4el39la6ctN%dial#####$$NOSPAM##$#$##@gmail.com>
	<MPG.1c8812b86921d563989696@news2.atlantic.net>
Message-ID: <1gsigz7.1vc5boq173k51cN%dial#####$$NOSPAM##$#$##@gmail.com>

Chris <secun at yahoo.com> wrote:

> Does anyone else have any Nevow examples?

Nevow SVN is full of examples ranging from a simple hello world to a
complete blog engine with xml-rpc, smtp and web interfaces for adding
new posts and an atom feed, or even a live chat or a pastebin or an
image uploader and so on.

-- 
Valentino Volonghi aka Dialtone
Now Running MacOSX 10.3.8
Blog: http://vvolonghi.blogspot.com
http://weever.berlios.de


From godoy at ieee.org  Fri Feb 11 12:34:35 2005
From: godoy at ieee.org (Jorge Luiz Godoy Filho)
Date: Fri, 11 Feb 2005 15:34:35 -0200
Subject: Postgres and SSL
References: <mailman.2401.1108140350.22381.python-list@python.org>
Message-ID: <1223014.6WjCJWoPXh@jupiter.g2ctech>

Greg Lindstrom wrote:

> I'm on a Linux box running python 2.3 and would like to connect to a
> postgres database via SSL, but have not been able to find a module to do
> this (or haven't figured out the syntax).  Can anyone help me out?

With both psycopg and pypgsql it depends on how your libpq was compiled.  If
the libraries from your PostgreSQL installation were compiled to support
SSL, then you can connect to the server without any problems. 


Be seeing you,
Godoy.


From davidf at sjsoft.com  Tue Feb  1 02:16:58 2005
From: davidf at sjsoft.com (David Fraser)
Date: Tue, 01 Feb 2005 09:16:58 +0200
Subject: [ANN] Spike Asset Manager release 0.13
In-Reply-To: <1107206259.910842.111840@f14g2000cwb.googlegroups.com>
References: <1107196878.026930.154270@c13g2000cwb.googlegroups.com>
	<16894.36152.345508.583247@montanaro.dyndns.org>
	<mailman.1660.1107201946.22381.python-list@python.org>
	<1107206259.910842.111840@f14g2000cwb.googlegroups.com>
Message-ID: <ctnada$3d5$1@ctb-nnrp2.saix.net>

mh wrote:
> Fredrik-
> 
> This is a known issue.  The tool currently only looks in certain
> locations or hints rather then spidering the whole hard drive (which
> could take a bit of time).  If you have installed in a non-standard
> location (or are using a platform or version of software that hasn't
> been tested against) the tool won't find the component.
> 
> One way around this is manually enter more "hints" but this doesn't
> scale.  I'm open to suggestions for handling this in a better way.
> 
> matt
> 
> ps-I assume you are running on windows.  Where is python installed on
> your machine?
> 
Windows also has package management in the form of Windows Installer, it 
would be better to use that on windows than simply look in locations...

David


From guettli at thomas-guettler.de  Wed Feb 23 04:45:55 2005
From: guettli at thomas-guettler.de (Thomas Guettler)
Date: Wed, 23 Feb 2005 10:45:55 +0100
Subject: user interface for python
References: <1109131790.140672.209730@l41g2000cwc.googlegroups.com>
Message-ID: <pan.2005.02.23.09.45.55.878755@thomas-guettler.de>

Am Tue, 22 Feb 2005 20:09:50 -0800 schrieb Raghul:

> Hi,
>    Which of the UI I can used for my program that I can use both in
> windows and in Linux. Is it possible for me to use Wxpython for my
> program so that it can run on both the windows and linux machine? Will
> it be platform independent?

Hi,

I like pygtk. It should be portable to windows, but I have
not tried this yet. Up to now I only used it under linux.

 Thomas


-- 
Thomas G?ttler, http://www.thomas-guettler.de/




From bearophileHUGS at lycos.com  Sun Feb 20 06:31:33 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 20 Feb 2005 03:31:33 -0800
Subject: exercise: partition a list by equivalence
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<1108814276.680736.264380@l41g2000cwc.googlegroups.com>
	<37pb5jF5fnfivU1@individual.net>
	<1108890925.941814.45860@g14g2000cwa.googlegroups.com>
	<1108895373.013257.192310@l41g2000cwc.googlegroups.com>
Message-ID: <1108899093.340446.216420@o13g2000cwo.googlegroups.com>

John Machin:
>Perhaps I'm missing a posting of yours -- what are merge2 and merge4?
What is "this random pairs test"? What is xMax (nPairs isn't hard to
guess), and how are you generating your input data?<

merge2 and this random pairs test comes from the post by Brian Beck.
merge4 is the first in my last post. And merge3 isn't included (nor
tested) because it uses the original (slow) addArcs.
This is the simple test generator taken from his post:

xMax = 3000
nPairs = xMax*5
l = [[randint(0,xMax), randint(0,xMax)] for i in xrange(nPairs)]
For such high number of nPairs (arcs), the resulting graph usuall has
one big connected component, and few tiny debris... To produce a more
divided graph, nPairs have to be much smaller, like xMax*1.5.


>FWIW, my offering is attached. <

I'm sorry, I don't see the attach... (just the different title).


John Machin:
>Only David's uses stuff that's not in the Python 2.4 off-the-shelf
distribution.<

Well, using already mede functions and classes is good, it avoids you
to reinvent things each time. Some of my versions too use my graph
library (for a problem like this I usually don't create stand alone
versions like merge6 and merge7). And my original point was adding one
graph data structure to the standard Python library :-]
I haven't tested the speed of David Eppstein version...

Anyway, this is a simplified version of merge6, that uses an indirect
graph g, instead of the directed graph, and avoids the use of chain:

. from collections import deque
.
. def merge7(l):
.     # Undirect graph g creation:
.     g = {}
.     for n1,n2 in l:
.         if n1 not in g: g[n1] = {n2:0}
.         else: g[n1][n2] = 0
.         if n2 not in g: g[n2] = {n1:0}
.         else: g[n2][n1] = 0
.     # Connected components:
.     result = []
.     visited = set()
.     for root in g.iterkeys():
.         if root not in visited:
.             component = [root]
.             visited.add(root)
.             Q = deque() # A queue
.             Q.append(root)
.             while Q:
.                 n1 = Q.popleft()
.                 for n2 in g[n1].iterkeys():
.                     if n2 not in visited:
.                         visited.add(n2)
.                         Q.append(n2)
.                         component.append(n2)
.             result.append(component)
.     return result


It's a bit shorter and a little faster than merge6, memory used is
similar (there is only one dictionary, so there is only one
ammortization overhead of the dictionary, but it contains the sum of
both arcs, so the ammortization can be twice as big, so... memory used
can be the same).
(Usually BFS and DFS memory requirements are a little different; this
implementation uses BFS, and I think it uses a bit less memory than
DFS, but for this problem/test the difference isn't significative.)

Bear hugs,
Bearophile



From xah at xahlee.org  Sat Feb 26 07:07:11 2005
From: xah at xahlee.org (Xah Lee)
Date: 26 Feb 2005 04:07:11 -0800
Subject: generic equivalence partition
In-Reply-To: <1109245733.261643.219420@f14g2000cwb.googlegroups.com>
References: <1109245733.261643.219420@f14g2000cwb.googlegroups.com>
Message-ID: <1109419631.693212.236890@z14g2000cwz.googlegroups.com>

# the following solution is submitted by
# Sean Gugler and David Eppstein independently
# 20050224.

@def parti(aList, equalFunc):
@    result = []
@    for i in range(len(aList)):
@        for s in result:
@            if equalFunc( aList[i], aList[s[0]] ):
@                s.append(i)
@                break
@        else:
@            result.append( [i] )
@    return [[x+1 for x in L] for L in result] # add 1 to all numbers
@
@---------------

as for my original perl code, i realized it is written to work on a
sorted input. Here it is and the translated Python code.

# perl
sub parti($$) {
my @li = @{$_[0]};
my $sameQ = $_[1];

my @tray=(1);
my @result;

for (my $i=1; $i <= ((scalar @li)-1); $i++) {
  if (&$sameQ($li[$i-1], $li[$i])) {
    push @tray, $i+1}
  else {
    push @result, [@tray]; @tray=($i+1);
  }
}
push @result, [@tray];
return \@result;
}


@#python
@def parti(li,sameQ):
@    tray=[1];
@    result=[];
@
@    for i in range(1, len(li) ):
@        if sameQ(li[i-1],li[i]):
@            tray.append(i+1)
@        else:
@            result.append(tray)
@            tray=[i+1]
@    result.append(tray)
@    return result
@

http://xahlee.org/perl-python/gen_parti_by_equiv.html

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From fredrik at pythonware.com  Fri Feb 11 13:25:14 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 11 Feb 2005 19:25:14 +0100
Subject: is there a safe marshaler?
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl><420b6e98$0$23018$626a14ce@news.free.fr><420b9135$0$28982$e4fe514c@news.xs4all.nl><3b091a1c.0502110634.5edb1987@posting.google.com>
	<420cef48$0$28977$e4fe514c@news.xs4all.nl>
Message-ID: <cuit66$7ai$1@sea.gmane.org>

Irmen de Jong wrote:

>> but can't effbot's fast cElementree be used for PYROs XML_PICKLE and would it be safe and fast 
>> enough?
>
> ElementTree's not a marshaler.
> Or has it object (de)serialization included?

nope.  building a serialization layer on top of it is pretty trivial, and the result
is pretty fast, but nowhere close to C speed.

</F> 





From miki.tebeka at zoran.com  Tue Feb  8 06:25:27 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Tue, 8 Feb 2005 13:25:27 +0200
Subject: Choosing the right parser for parsing C headers
In-Reply-To: <1107861023.254610.14310@g14g2000cwa.googlegroups.com>
References: <1107861023.254610.14310@g14g2000cwa.googlegroups.com>
Message-ID: <20050208112505.GC2156@zoran.com>

Hello Jean,

> - ply:
> Lex / Yacc for python! Tackle the Beast! Syntax processing looks
mini_c is a C compiler written using ply. You can just use it as is.
http://people.cs.uchicago.edu/~varmaa/mini_c/

HTH.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys


From removethis.kartic.krishnamurthy at gmail.com  Wed Feb  9 22:08:55 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Thu, 10 Feb 2005 03:08:55 GMT
Subject: Help: retrieving e-mail from yahoo pop server. what's wrong?
In-Reply-To: <SPudnZsg_LtcN5ffRVn-iQ@rcn.net>
References: <q6idnUufKYXN8pffRVn-pA@rcn.net>
	<1107983472.417329.292750@l41g2000cwc.googlegroups.com>
	<SPudnZsg_LtcN5ffRVn-iQ@rcn.net>
Message-ID: <bfAOd.37414$ZD1.23827@twister.nyroc.rr.com>

Andre said the following on 2/9/2005 7:28 PM:
> Thank, Kartic
> 
> I actually tried doing it with several other accounts, notably mail.com and
> netscape.com
> When i do it with netscape the dialog goes like the following:
> 
> The username and password are naturally valid, but something else is wrong.
> Do you know if Netscape also doesn't allow POP access? Is there a free
> e-mail provider who does?


Okay..this OT now!

Gmail provides pop access. Or you can use fastmail.fm, they hae a free 
account option with POP3 as well as IMAP access.

Before you post any Python code, first try with some email client and 
then try with Python code.

-Kartic


From sean_mcilroy at yahoo.com  Wed Feb  9 15:07:57 2005
From: sean_mcilroy at yahoo.com (Sean McIlroy)
Date: 9 Feb 2005 12:07:57 -0800
Subject: two questions - no common theme
Message-ID: <e5063e96.0502091207.37b1dd54@posting.google.com>

And now for a pair of questions that are completely different:

1) I'd like to be able to bind callbacks to presses of the arrow
buttons on the keyboard. How do you say that in Tkinter?

2) The function 'listdir' in os.path returns a list of all the files
in the given directory - how do I get hold of a list of its
subdirectories?

Any help will be greatly appreciated.

Peace,
STM


From someone at someplace.somewhere  Mon Feb  7 08:20:20 2005
From: someone at someplace.somewhere (Jonathan Polley)
Date: Mon, 07 Feb 2005 13:20:20 GMT
Subject: Unable to run IDLE Under Windows
References: <060220052259038640%eq_fidget@mac.com>
	<36ofmlF533252U1@individual.net>
Message-ID: <070220050720198940%someone@someplace.somewhere>

In article <36ofmlF533252U1 at individual.net>, Marian Aldenh?vel
<marian at mba-software.de> wrote:

> Hi,
> 
>  > Any ideas as to what might me wrong?
> 
> > TclError: unknown color name "white "
> 
> There is a space after "white" in this error-message. If this string comes
> from some per-user configuration that may well explain your problem.
> 
> Ciao, MM

Where do I have to go in order to fix it?  It follows them from
computer to computer...

Thanks,

Jonathan Polley


From andrea.gavana at agip.it  Mon Feb 28 11:20:11 2005
From: andrea.gavana at agip.it (andrea.gavana at agip.it)
Date: Mon, 28 Feb 2005 17:20:11 +0100
Subject: String Replace Problem
Message-ID: <OF88800A9A.77818F6D-ONC1256FB6.005982E5-C1256FB6.0059BD24@eni.pri>

Hello Peter And NG,

      thank you a lot... now I'm blaming myself, how couldn't I see it? I
will probably go for the re.sub (if it is not too complicated, I'm not a
Python expert and even less expert of RegEx things), if not I'll try your
suggestion of sorting the strings by length.

Thanks a lot.

Andrea.

------------------------------------------------------------------------------------------------------------------------------------------
 Message for the recipient only, if received in error, please notify the
sender and read http://www.eni.it/disclaimer/




From devries at idolstarastronomer.com  Mon Feb  7 13:59:12 2005
From: devries at idolstarastronomer.com (Christopher De Vries)
Date: Mon, 7 Feb 2005 13:59:12 -0500
Subject: New to unix/python. How to install
In-Reply-To: <ea314a5f.0502061342.489708e8@posting.google.com>
References: <ea314a5f.0502061342.489708e8@posting.google.com>
Message-ID: <20050207185912.GA7455@miyu.cjas.org>

On Sun, Feb 06, 2005 at 01:42:22PM -0800, Bobby Owens wrote:
> I've muddled through the python code and figured out parts of it. I've
> now installed Sun Solaris 10 on a VM ware installation successfully
> and can muddle thorough the basics of the o/s. I cant figure out how
> to install python. From looking online I've found what I think I need:
> 
> - python-2.3.3-sol9-intel-local
> - libgcc-3.3-sol10-intel-local

I wouldn't worry about these binary packages. Usually under solaris compiling
the source works fine. Download the source from this page:
http://www.python.org/download/ 

It comes as a gzipped tar file. You can unpack it by issuing the command:

gunzip -c Python-2.4.tgz | tar xvf -

Change into the Python-2.4 directory and run the commands:

./configure
make

as "root" run the command:

make install

Python should install into /usr/local. The python interpreter should be
/usr/local/bin/python. Since python is written in C, you do not need to use the
Gnu C compiler to compile it, ./configure should find an appropriate C
compiler, and everything should work fine. Feel free to reply if this series of
steps does not work.

Good luck,

Chris


From vijay.nakhawa at gmail.com  Wed Feb  2 00:38:15 2005
From: vijay.nakhawa at gmail.com (vijay)
Date: 1 Feb 2005 21:38:15 -0800
Subject: how to use python scripts in zope3
Message-ID: <6c466d2d.0502012138.6dcdb8de@posting.google.com>

hi
Recently i started learning zope3 framework.
Unlike in zope2.7 , there is no Script(Python) component
in the addlist of zope3.
Also by inserting scripts in zpt it gives me error.
Somebody help me in using python script in zope3.
Thank you.


From leszczynscy at nospamyahoo.com  Sat Feb 19 12:27:58 2005
From: leszczynscy at nospamyahoo.com (Andy Leszczynski)
Date: Sat, 19 Feb 2005 11:27:58 -0600
Subject: wxPython 2.5 - bug in wx.Execute
Message-ID: <KqudnVXtWs9A64rfRVn-2Q@comcast.com>

Hi,

I need a help with following problem which is blocking me quite seriously.

I noted some weird behavior on Windows (Python 2.3, wxPython 2.5). The 
same code works fine under Linux.

When using ?pid = wx.Execute(cmd, wx.EXEC_ASYNC, self.process)? to spawn 
new wxPython based GUI program, the GUI does not pop up. I checked that 
the process itself is running/alive, the print over the streams get 
propagated to the parent process, but no GUI. It only happnes for 
wxPython based programs - for e.g. regural python command line programs 
it works fine.

It is easy to be replicated using wx Demo by opening Process and 
Events/Process.  Then after typing in "python -u demo.py"  nothing happens.


Please help, it really blocks me.  The temporary work around is to use 
"cmd /e python -u demo.py", but I lose the unbuffered -u effect.

Thanks,
Andy


From jicman at gmail.com  Wed Feb  9 12:56:15 2005
From: jicman at gmail.com (jicman)
Date: 9 Feb 2005 09:56:15 -0800
Subject: Java Integer.ParseInt translation to python
In-Reply-To: <1107950708.037808.211570@l41g2000cwc.googlegroups.com>
References: <008d01c507f4$451d9b30$2820790d@stso.xcdg.xerox.com>
	<372a762405013116263a4e93b7@mail.gmail.com>
	<mailman.2222.1107909486.22381.python-list@python.org>
	<1107950708.037808.211570@l41g2000cwc.googlegroups.com>
Message-ID: <1107971775.794116.317250@c13g2000cwb.googlegroups.com>


John Machin wrote:
> jose isaias cabrera wrote:
> However some Java code (I can't believe that it was the Java code
that
> you posted) has printed NINE bytes which bear no relation that I can
> see to any of the TWENTY bytes that the posted Java code should have
> stowed in retBuf.

I know what you're saying, John.  That's what is encryptic about this
whole thing.  The [byte] call in front of any variable will turn the
variable value to a "byte".  If you look at the code at the java code
at the beginning,

>>>   byte[] retBuf = new byte[inString.length()/2];

this retBuf is an array of bytes.  Whatever that means in java.  And
yes, that is the right output or result.  Hmmm, maybe an array of bytes
will turn into retBuf[0]+retBuf[0] = the first letter... Hmmmm....

> You claim that "[B at 1616c7" is the right answer -- what is the
question?

Well, how can I get that exact answer from python?

> What is it meant to be? Your routine is called PrepareHash; is it
> possible that you are seeing these 9 bytes _after_ hashing?

Well, now that you say that, it may be that there is a space there.
Hmmmm, let me try that again...

> Funny
> hashing scheme; they usually give 4, 8, 16, etc bytes, but worth an
ask
> ...

yep, you're right...



From nelson at monkey.org  Wed Feb  2 18:13:40 2005
From: nelson at monkey.org (Nelson Minar)
Date: Wed, 02 Feb 2005 23:13:40 GMT
Subject: Where are list methods documented?
References: <41ffba7d$0$15879$a1866201@visi.com>
Message-ID: <cpasm4esggs.fsf@cabernet.nelson.monkey.org>

You're not the only one with a hard time finding the list
documentation. It's even crazier for string docs.

If you want to see how to strip strings in Python you have to go to
the library docs, then click "sequence types" (betcha don't think of
strings as sequences), then scroll to the bottom, then click "String
Methods", then scroll to find "strip()". This makes perfect sense if
you understand that strings are "mutable sequences". But if you're
coming from (say) Perl and are looking for the quick way to work with
strings, it's pretty deeply buried.

A simple internal link or two would help a lot. Say, something in
"built-in functions" which says "see also..."



From rlwm.erens at home.nl  Thu Feb 17 08:41:12 2005
From: rlwm.erens at home.nl (Roger)
Date: 17 Feb 2005 05:41:12 -0800
Subject: Is it possible to use the logging-module in a threadless
	environment?
Message-ID: <5475062c.0502170541.41ec4320@posting.google.com>

I'd like to use a program (roundup) that imports the logging.config
module on a machine where I could not get the thread and threading
modules to compile.

How dangerous is it to changing /lib/python2.4/logging/config.py to
something like:

import dummy_thread as thread, dummy_threading as threading


Thanks in advance,
Roger Erens


From timh at zute.net  Mon Feb  7 21:08:44 2005
From: timh at zute.net (Tim Hoffman)
Date: Tue, 08 Feb 2005 10:08:44 +0800
Subject: Memory Allocation?
In-Reply-To: <KGTNd.14501$f%5.7760@trndny03>
References: <8GCNd.9880$ya6.9761@trndny01>
	<donn-0E17FC.09400107022005@gnus01.u.washington.edu>
	<KGTNd.14501$f%5.7760@trndny03>
Message-ID: <42081f2e@news.highway1.com.au>

Hi Chris

Have a look at 
http://www.python.org/doc/2.3.4/whatsnew/section-pymalloc.html

for a description of what is going on.

Basically malloc is used to grab a big chunk of memory, then
python objects use bits of it.

Rgds

Tim

Chris S. wrote:
> Donn Cave wrote:
> 
>> In article <8GCNd.9880$ya6.9761 at trndny01>,
>>  "Chris S." <chrisks at NOSPAM.udel.edu> wrote:
>>
>>
>>> Is it possible to determine how much memory is allocated by an 
>>> arbitrary Python object? There doesn't seem to be anything in the 
>>> docs about this, but considering that Python manages memory 
>>> allocation, why would such a module be more difficult to design than 
>>> say, the GC?
>>
>>
>>
>> Sorry, I didn't follow that - such a module as what?
> 
> 
> GC == Garbage Collector (http://docs.python.org/lib/module-gc.html)
> 
>> Along with the kind of complicated internal implementation
>> details, you may need to consider the possibility that the
>> platform malloc() may reserve more than the allocated amount,
>> for its own bookkeeping but also for alignment.  It isn't
>> a reliable guide by any means, but something like this might
>> be at least entertaining -
>>
>>    >>>    >>> class A:
>>    ...     def __init__(self, a):
>>    ...             self.a = a
>>    ...    >>> d = map(id, map(A, [0]*32))
>>    >>> d.sort()
>>    >>> k = 0
>>    >>> for i in d:
>>    ...     print i - k
>>    ...     k = i
>>    ...
>> This depends on the fact that id(a) returns a's storage
>> address.
>>
>> I get very different results from one platform to another,
>> and I'm not sure what they mean, but at a guess, I think
>> you will see a fairly small number, like 40 or 48, that
>> represents the immediate allocation for the object, and
>> then a lot of intervals three or four times larger that
>> represent all the memory allocated in the course of creating
>> it.  It isn't clear that this is all still allocated -
>> malloc() doesn't necessarily reuse a freed block right
>> away, and in fact the most interesting thing about this
>> experiment is how different this part looks on different
>> platforms.  Of course we're still a bit in the dark as
>> to how much memory is really allocated for overhead.
>>
>>    Donn Cave, donn at u.washington.edu
> 
> 
> Are you referring to Python's general method of memory management? I was 
> under the impression that the ISO C specification for malloc() dictates 
> allocation of a fixed amount of memory. free(), not malloc(), handles 
> deallocation. Am I wrong? Does Python use a custom non-standard 
> implementation of malloc()?


From kent3737 at yahoo.com  Fri Feb  4 17:33:17 2005
From: kent3737 at yahoo.com (Kent Johnson)
Date: Fri, 04 Feb 2005 17:33:17 -0500
Subject: Possible additions to the standard library? (WAS: About
 standardlibrary improvement)
In-Reply-To: <mailman.1863.1107489145.22381.python-list@python.org>
References: <WorldClient-F200502031432.AA32333857@tesla.cujae.edu.cu>
	<mailman.1863.1107489145.22381.python-list@python.org>
Message-ID: <4203f56d$1_3@newspeer2.tds.net>

Daniel Bickett wrote:
> |    def reverse( self ):
> |        """
> |        Return a reversed copy of string.
> |        """
> |        string = [ x for x in self.__str__() ]
> |        string.reverse()
> |        return ''.join( string )

def reverse(self):
     return self[::-1]

Kent


From http  Mon Feb 14 18:50:45 2005
From: http (Paul Rubin)
Date: 14 Feb 2005 15:50:45 -0800
Subject: Inheritance error in python 2.3.4???
References: <1108422852.332215.165790@o13g2000cwo.googlegroups.com>
	<mailman.2587.1108423573.22381.python-list@python.org>
	<1108424593.009391.187930@z14g2000cwz.googlegroups.com>
Message-ID: <7xbrambt0q.fsf@ruckus.brouhaha.com>

"friedmud at gmail.com" <friedmud at gmail.com> writes:
> The problem is that I actually do need them to be private to the
> outside world... but not to subclasses.  I guess what I actually need
> is something like "protected" in C++.... but I don't think I'm going to
> get that luxury.

The only way to make instance variables really private is to put them
in a separate process and use IPC to reach the accessors.  The __xyz
convention results in deterministic name mangling that other parts of
the program can undo if they wish to.


From uche.ogbuji at gmail.com  Mon Feb 28 22:34:08 2005
From: uche.ogbuji at gmail.com (uche.ogbuji at gmail.com)
Date: 28 Feb 2005 19:34:08 -0800
Subject: best XSLT processor?
In-Reply-To: <1109646196.351284.77630@z14g2000cwz.googlegroups.com>
References: <yvgUd.9678$_G.5042@clgrps12>
	<mailman.3135.1109595858.22381.python-list@python.org>
	<1109646196.351284.77630@z14g2000cwz.googlegroups.com>
Message-ID: <1109648048.416434.235840@g14g2000cwa.googlegroups.com>

Actually, most of the compliant problems I can remember off-head with
respect to Xalan have been regarding EXSLT 1.0, not base XSLT 1.0.
Sorry for any misconstruction.

--Uche



From steve at holdenweb.com  Wed Feb  9 12:58:57 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 09 Feb 2005 12:58:57 -0500
Subject: Python and version control
In-Reply-To: <XNrOd.1657$Mw3.72@amstwist00>
References: <XNrOd.1657$Mw3.72@amstwist00>
Message-ID: <cudis0$6do$1@sea.gmane.org>

Carl wrote:

> Dear friends,
> 
> What is the ultimate version control tool for Python if you are working in a
> Windows environment? 
> 
> When you work on a Visual C++ project then it's easy, use Visual Source Safe
> for your source code! But when it comes to large Python projects and no
> universal Python IDE with version control integration is available,
> checking in and out files is not as simple. I am a keen user of Emacs, but
> version control, which is very simple when you are in a Linux environment,
> for example, is not a straightforward in Windows.
> 
> What is the most common adopted approach among Python developers working in
> a Windows environment? 
> 
> Carl
> 
You can integrate PythonWin and version control if you know the 
appropriate incantation. Vss used to work fine, but I upgraded and 
couldn't be bothered to go through the installation steps again.

regards
  Steve



From johann at rocholl.net  Thu Feb 10 14:37:52 2005
From: johann at rocholl.net (Johann C. Rocholl)
Date: Thu, 10 Feb 2005 20:37:52 +0100
Subject: That horrible regexp idiom
In-Reply-To: <3e8ca5c805020923107c36cd7f@mail.gmail.com>
References: <3e8ca5c805020923107c36cd7f@mail.gmail.com>
Message-ID: <20050210193752.GA10075@rocholl.net>

Hi,

> import re
> foo_pattern = re.compile('foo')
> 
> '>>> m = foo_pattern.search(subject)
> '>>> if m:
> '>>>    pass
> '>>> else:
> '>>>    pass

I agree that is horrible. This is one of my favorite problems with
python syntax.

> but it occured to me today, that it is possible to do it in python
> without the extra line.
> '
> '>>> def xsearch(pattern, subject):
> '>>>     yield pattern.search(subject)
> 
> '>>> for m in xsearch(foo_pattern, subject):
> '>>>     pass
> '>>> else:
> '>>>     pass

I think I wouldd rather have it this way, based on a suggestion by
Diez B. Roggisch recently:

import re

class matcher:
    def __init__(self, regex):
        self.regex = re.compile(regex)
    def match(self, s):
        self.m = self.regex.match(s)
        return not self.m is None
    def search(self, s):
        self.m = self.regex.search(s)
        return not self.m is None
    def group(self, n = None):
        if n is None:
            return self.m.group()
        return self.m.group(n)

m = matcher('(foo)(.*)')
if m.match('foobar'):
    print m.group()
if m.search('barfoobaz'):
    print m.group(2)

I think one solution that does not need a wrapper class would be to
add the group() method to the match objects from module 're'. IIRC,
the obsolete package 'regex' provided this, once upon a time.

Cheers,
Johann


From harlinseritt at yahoo.com  Tue Feb 22 08:04:24 2005
From: harlinseritt at yahoo.com (Harlin)
Date: 22 Feb 2005 05:04:24 -0800
Subject: Creating Button arrays with different commands using Tkinter
Message-ID: <1109077464.543960.282830@o13g2000cwo.googlegroups.com>

I have an array of Appnames. Let's say they are 'Monkeys', 'Cats',
'Birds'.

I would like create a button array with these:

---Start Code---
# Constructing and displaying buttons
for a in Appnames:
   Button(root, text=a, command=lambda:self.OpenFile(a)).pack()

# Somewhere else I have this function defined within the class...
def OpenFile(self, AppName):
   fh = open(AppName+".txt", 'r').read()
   do something with fh

---End Code---

When I do this, whatever the last value a was is what the each button's
command option is. Does anyone know what I can do to differentiate each
button so that it has its own separate argument for self.OpenFile?

Thanks,

Harlin



From lbates at syscononline.com  Wed Feb  2 11:18:28 2005
From: lbates at syscononline.com (Larry Bates)
Date: Wed, 02 Feb 2005 10:18:28 -0600
Subject: Prepending to traceback
In-Reply-To: <ctqijj$q6t$1@lnx107.hrz.tu-darmstadt.de>
References: <ctqijj$q6t$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <7JSdndRZRunRYJ3fRVn-sw@comcast.com>

Replace system exception hook with your on function that gets
called when exception is raised (not fully tested):

#
# Define a function that is called when system exception happens
#
def excepthook(self, type, value, tb):
     #
     # This function allows the user to redefine what happens if the program
     # aborts due to an uncaught exception.
     import traceback
     #
     # Prepend your lines to tblines list here
     #
     tblines=['PyParsing, line 5, in SomeStatement\n',
              'PARSER TEST FOR TESTING MISSING TERM\n']

     #
     # Get traceback lines and append the current session log
     #
     tblines.extend(traceback.format_exception(type, value, tb))
     map(sys.stdout.writelines, tblines)  # Always write exceptions to screen
     sys.exit(2)

#
# At top of your main program:
# Set the sys.excepthook so I can clean up properly if main program aborts
#
sys.excepthook=excepthook

Larry Bates



Stefan Behnel wrote:
> Hi!
> 
> I'm writing a parser using pyparsing and I would like to augment the 
> ParserException tracebacks with information about the actual error line 
> *in the parsed text*. Pyparsing provides me with everything I need 
> (parsed line and column), but is there a way to push that information on 
> the traceback?
> 
> 
> To make it a bit clearer, tracebacks currently look like this:
> 
> Traceback (most recent call last):
>  ...
>   File "/usr/lib/python2.4/site-packages/pyparsing.py", line 456, in parse
>     loc,tokens = self.parseImpl( instring, loc, doActions )
>   File "/usr/lib/python2.4/site-packages/pyparsing.py", line 727, in 
> parseImpl
>     raise exc
> ParseException: Expected "SOMEOTHERTERM" (146), (5,9)
> 
> 
> I want them to look like this:
> 
> Traceback (most recent call last):
>  ...
>   File "/usr/lib/python2.4/site-packages/pyparsing.py", line 456, in parse
>     loc,tokens = self.parseImpl( instring, loc, doActions )
>   File "/usr/lib/python2.4/site-packages/pyparsing.py", line 727, in 
> parseImpl
>     raise exc
>   PyParsing, line 5, in SomeStatement
>     PARSER TEST FOR TESTING MISSING TERM
> ParseException: Expected "SOMEOTHERTERM" (146), (5,9)
> 
> 
> where "PARSER TEST FOR TESTING MISSING TERM" is a line parsed by 
> pyparsing that leads to raising a ParseException. I wouldn't mind too 
> much not having the original traceback, though I'd prefer it. I remember 
> having read somewhere that there is a way to embed an exceptions in 
> another one, that might help.
> 
> How can I alter or create such Tracebacks?
> 
> Thanks,
> Stefan


From sjmachin at lexicon.net  Thu Feb 10 00:55:32 2005
From: sjmachin at lexicon.net (John Machin)
Date: 9 Feb 2005 21:55:32 -0800
Subject: negative integer division
References: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
	<cu91bf$9nk$1@news.wrc.xerox.com>
Message-ID: <c76ff6fc.0502092155.53c62e29@posting.google.com>

mjackson at alumni.caltech.edu (Mark Jackson) wrote in message news:<cu91bf$9nk$1 at news.wrc.xerox.com>...
> 
> A:  42
> 
> Q:  What multiple of 7 did I add to the critical expression in the Zeller
>     algorithm so it would remain nonnegative for the next few centuries?

What are you calling "the Zeller algorithm", and what is the "critical
expression"?

There _is_ something called "Zeller's congruence":

if m is the month number in an adjusted or computational year (m == 0
=> March, m == 11 => Feb), then the number of days in the adjusted
year before month m is [Python notation] (13*m + 2) // 5 + m * 28

Alternatively (153*m + 2) // 5

I believe that strictly the term "Zeller's congruence" applies only to
the (13*m + 2)//5 part. In any case, all of the above is quite
independent of the year, and there is no possibility of going
negative.

I've no doubt you came across a stuffed-up date-to-days calculation
routine and fixed it, but it's a bit unfair to lumber Zeller with the
blame. If it was a days-to-date routine, then Zeller is not even
standing next to the real target.

Cheers,
John


From zathras at thwackety.com  Sat Feb 12 07:51:21 2005
From: zathras at thwackety.com (Michael Sparks)
Date: Sat, 12 Feb 2005 12:51:21 +0000 (GMT)
Subject: [perl-python] 20050211 generating expression by nested loops
In-Reply-To: <1108162972.047914.20780@l41g2000cwc.googlegroups.com>
Message-ID: <Pine.LNX.4.44.0502121209440.1685-100000@pingu.thwackety.com>

On 11 Feb 2005, Xah Lee wrote:

> # this construct uses a irregular syntax to generate a expression
> # built by nested loops.  Semantically, this expression generation is
> # akin to applying a function to a tree. Morons in the computing
> # industry and academia like to call this "list comprehension".

People who try to change existing terminology in a language by declaring
the terminology used by __everyone__ are generally those considered
moronic.

Xah Lee - I know you have been declared a Troll on many an occasion, and
it does seem a fitting declaration based on your behaviour. Consider that
all you are achieving is making yourself look foolish to both the
established perl community and the established python communities.

Your code examples are NOT exemplars for either language or community. By
trying to get new users to ignore existing terminology you ARE doing those
people a disservice. (If indeed your goal is as stated to try and help new
users).

Taking 'list comprehension' for example. There is a long standing concept
that is decades old (centuries old even?) called "set comprehension".
This is taught in schools and says "from this set of things take these
values perhaps based on a condition". List comprehension alludes to this
and as soon as I saw the syntax and what it was called it was very clear
what this "moronic" description meant.

Clearly not everyone is in the same boat. However what will they search
for? If told it's a "list comprehension", suppose they search for that -
what will their #1 search result be? On google, the number 1 result is
this:
   http://docs.python.org/tut/node7.html
   * This is the python tutorial section that deals with data structures
     and includes a section on "moronically named" list comprehensions.
     One can debate whether naming something distinctly and clearly which
     results in the #1 search result being a tutorial on the structure as
     being a good or a bad thing. I'll make no judgement here.

So by trying to get people to call it something else - do new users get
better results ? If you were doing new users a service then the answer
should be yes. Is it, and are you doing them a service?

Let's try the same thing for "irregular syntax":
   * http://www.google.com/search?num=100&q=irregular+syntax
     None of these 100 results contains any reference to list
     comprehensions. Not so successful. None of the 3 results out of that
     100 that do relate to python refer even vaguely to python's list
     syntax. (2 relate to a scheme programmer finding python hard, and the
     other relates to Latin)

Well, you also incorrectly (or perhaps misleadingly) stated this:
   * Semantically, this expression generation is akin to applying a
     function to a tree.

If you provide an iterator on the tree (say a tree walker of some kind)
then this becomes technically true (__kinda__) , but the common case is
iterating over list of somekind. So again, assuming a new user, what might
they use as a search term using your description ? Let's try "applying a
function to a tree python". (last term to try and ensure it's on topic)

Do any of those search results do something as useful as, say, point at a
tutorial or documentation page on list comprehensions ?

Oddly no. The closest that comes to it is one of your pages, which is
taling about Perl & Mathematica. (Removing "python" makes it even further
removed from being relevant)

Based on seeing your perl and python code I would suggest you go away and
improve your idiomatic perl & python code before posting any more of these
things. Or at least try to cease attacking people declaring their
established terminology as moronic, etc. Posting naive translations
(which is what you've been doing) between languages can occasionally
be useful to help people get started. However acting as if they are
"masterful" translations and/or descriptions when they are not is not
helpful in the slightest.

It's very saddening to see something posted which new users will read and
assume, based on the tone on the post, that it's the _correct_ way of
describing things when it clearly is NOT, and will just end up misleading
them and sending them down blind alleys.


Michael.



From fredrik at pythonware.com  Mon Feb 14 12:08:59 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 18:08:59 +0100
Subject: ValueError: invalid literal for int(): 1.0000000000e+00
References: <4210D979.4000709@ribosome.natur.cuni.cz>
Message-ID: <cuqlqa$5gn$1@sea.gmane.org>

Martin MOKREJ? wrote:

> is this a bug or "feature" that I have to use float() to make int() autoconvert
> from it?

it's by design, of course.   "1.0000000000e+00" is not an integer.

if you want to treat a floating point literal as an integer, you have to
use an explicit conversion.

</F> 





From me at privacy.net  Mon Feb 28 15:50:22 2005
From: me at privacy.net (Dan Sommers)
Date: 28 Feb 2005 15:50:22 -0500
Subject: accessor/mutator functions
References: <1109315698.002207.245690@g14g2000cwa.googlegroups.com>
	<mailman.3038.1109319115.22381.python-list@python.org>
	<slrnd25qu6.cvr.nick@irishsea.home.craig-wood.com>
Message-ID: <m2wtssl88h.fsf@unique.fully.qualified.domain.name.yeah.right>

On 28 Feb 2005 10:30:03 GMT,
Nick Craig-Wood <nick at craig-wood.com> wrote:

> Actually I would say just access the attribute directly for both get
> and set, until it needs to do something special in which case use
> property().

> The reason why people fill their code up with boiler plate get/set
> methods is to give them the flexibility to change the implementation
> without having to change any of the users.  In python you just swap
> from direct attribute access to using property().

The reason their code is so inflexible is that they've filled their
classes with boiler plate get/set methods.

Why do users of classes need such access anyway?  If my class performs
useful functions and returns useful results, no user of my class should
care about its attributes.  If I "have to" allow access to my attributes
in order that my users be happy, then I did something else wrong when I
designed the class and its public interface in the first place.

I usually aim for this:  if users of the public interface of my class
can figure out that I changed the implementation, then I've exposed too
much.  Sure there are exceptions, but that's my basic thought process.

Sorry about the rant.

Regards,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>
?? ? ?? ? c? = 1


From gmane-schpam at joefrancia.com  Wed Feb  9 12:38:37 2005
From: gmane-schpam at joefrancia.com (Joe Francia)
Date: Wed, 09 Feb 2005 12:38:37 -0500
Subject: Python versus Perl ?
In-Reply-To: <1107930486.318280.251010@l41g2000cwc.googlegroups.com>
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>	<hkhc01dnpmmhn980quijqil40653qipdki@4ax.com>	<cuavn1$bag$1@nntp.msstate.edu>	<opslwvc2wx1js0xs@news.telkomsa.net>	<mailman.2218.1107902435.22381.python-list@python.org>
	<1107930486.318280.251010@l41g2000cwc.googlegroups.com>
Message-ID: <cudhnt$3lp$1@sea.gmane.org>

Caleb Hattingh wrote:
> As you might imagine, I think about this constantly.  However, there
> are many other issues that make it complicated, such as having to work
> in a team where the average guy knows pascal well (we're just a bunch
> of chemical engineers), but has never even heard of python.  Plus, were
> I to go this type of route, I would almost definitely code the binary
> modules in Delphi or FreePascal, make a DLL and use ctypes to call it.
> I do not know C and have no desire to learn now :)    On the other
> hand, I know pascal quite well.
> 
> keep well
> Caleb
> 

You could always code Python extensions directly in Delphi:

http://membres.lycos.fr/marat/delphi/python.htm
http://www.atug.com/andypatterns/PythonDelphiLatest.htm

Demo09 (look in demodll.dpr & module.pas) in the download tells you how.

Peace,
Joe



From dodoowang at gmail.com  Fri Feb 25 08:26:37 2005
From: dodoowang at gmail.com (dodoo)
Date: 25 Feb 2005 05:26:37 -0800
Subject: how to use property
In-Reply-To: <1109327145.250209.203720@o13g2000cwo.googlegroups.com>
References: <1109327145.250209.203720@o13g2000cwo.googlegroups.com>
Message-ID: <1109337997.348010.176130@l41g2000cwc.googlegroups.com>

try this: self.channel = choice



From duncan.booth at invalid.invalid  Fri Feb 18 04:27:04 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 18 Feb 2005 09:27:04 GMT
Subject: difference between class methods and instance methods
References: <pan.2005.02.17.07.04.37.907754@yahooz.com>
	<Xns96005FE3164DAduncanrcpcouk@127.0.0.1>
	<1119g2rre5g610c@corp.supernews.com>
	<37juh3F5d511mU1@individual.net>
	<Xns9600AE4FC946duncanrcpcouk@127.0.0.1>
	<1119p2o72976500@corp.supernews.com>
Message-ID: <Xns96015F11D861Aduncanrcpcouk@127.0.0.1>

John wrote:

>>inst = C()
>>f1 = inst.foo
>>f2 = inst.foo
>>f1, f2
>> 
>> (<bound method C.foo of <__main__.C instance at 0x00B03F58>>, <bound
>> method C.foo of <__main__.C instance at 0x00B03F58>>)
>> 
> 
> I just wanted to interject, although those two hex
> numbers in the above line are the same, calling
> id() on f1 and f2 produces two *different* numbers,
> which agrees with the point you made.

Yes, note that the numbers are in the repr of C() and are actually 
id(inst).

A common mistake seems to be for people to do:

>>> inst = C()
>>> id(inst.foo), id(inst.foo)
(11803664, 11803664)

and conclude that the bound methods are the same. They aren't, but if you 
just take the id of an object and throw it away then the next object of 
similar size can [and with the current implementation probably will] be 
allocated at the same location.


From stefan.behnel-n05pAM at web.de  Sun Feb 13 12:33:06 2005
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Sun, 13 Feb 2005 18:33:06 +0100
Subject: changing __call__ on demand
In-Reply-To: <cuo1op$m6h$1@gemini.csx.cam.ac.uk>
References: <cuo0e1$4l2$1@lnx107.hrz.tu-darmstadt.de>
	<cuo1op$m6h$1@gemini.csx.cam.ac.uk>
Message-ID: <cuo309$5fm$1@lnx107.hrz.tu-darmstadt.de>


Michael Hoffman schrieb:
> __call__, like __getitem__, and __getattr__ is called on the
> class object, not the instance object. So, no, not as far as I
> am aware, without using metaclass trickery. The simplest option
> IMO is to use another level of indirection as you suggest.

Thanks for the quick answer. I didn't know they were class-level methods. Too 
bad. Guess I'll stick with indirection then.

Stefan


From http  Thu Feb  3 19:20:30 2005
From: http (Paul Rubin)
Date: 03 Feb 2005 16:20:30 -0800
Subject: OT: why are LAMP sites slow?
Message-ID: <7x8y65kwfl.fsf@ruckus.brouhaha.com>

LAMP = Linux/Apache/MySQL/P{ython,erl,HP}.  Refers to the general
class of database-backed web sites built using those components.  This
being c.l.py, if you want, you can limit your interest to the case the
P stands for Python.

I notice that lots of the medium-largish sites (from hobbyist BBS's to
sites like Slashdot, Wikipedia, etc.)  built using this approach are
painfully slow even using seriously powerful server hardware.  Yet
compared to a really large site like Ebay or Hotmail (to say nothing
of Google), the traffic levels on those sites is just chickenfeed.

I wonder what the webheads here see as the bottlenecks.  Is it the
application code?  Disk bandwidth at the database side, that could be
cured with more ram caches or solid state disks?  SQL just inherently
slow?

I've only worked on one serious site of this type and it was "SAJO"
(Solaris Apache Java Oracle) rather than LAMP, but the concepts are
the same.  I just feel like something bogus has to be going on.  I
think even sites like Slashdot handle fewer TPS than a 1960's airline
reservation that ran on hardware with a fraction of the power of one
of today's laptops.

How would you go about building such a site?  Is LAMP really the right
approach?


From dave at pythonapocrypha.com  Sat Feb 26 01:05:55 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Fri, 25 Feb 2005 23:05:55 -0700
Subject: urllib2 meta-refresh
In-Reply-To: <pan.2005.02.26.05.33.14.950763@yahoo.com>
References: <pan.2005.02.26.05.33.14.950763@yahoo.com>
Message-ID: <422011C3.6000304@pythonapocrypha.com>

Artificial Life wrote:
> urllib2 does not seem to be able to handle META-REFRESH in an html
> document. I just get back the html to the page that is supposed to forward
> me to the intended page.

Right - urllib2 is for working with protocols (like HTTP) to transfer data, 
whereas META-REFRESH is an application (browser) level "instruction" *in* that 
data. Compare this to a 302 HTTP response header (a simple redirect) - urllib2 
can handle it because it is part of HTTP.

> Any way around this? 

Sure - META-REFRESH is an instruction to the browser, so have your code be the 
browser: scan the HTML for the tag, extract the URL, and send that new URL off 
to urllib2.

-Dave


From jfj at freemail.gr  Mon Feb 14 21:14:20 2005
From: jfj at freemail.gr (jfj)
Date: Mon, 14 Feb 2005 18:14:20 -0800
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <4210a434$0$23451$626a14ce@news.free.fr>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<4210a434$0$23451$626a14ce@news.free.fr>
Message-ID: <42115AFC.9040806@freemail.gr>

bruno modulix wrote:
> Ilias Lazaridis wrote:
> 
>> I'm a newcomer to python:
>>
>> [EVALUATION] - E01: The Java Failure - May Python Helps?
>> http://groups-beta.google.com/group/comp.lang.python/msg/75f0c5c35374f553
>>
> 
> My trollometer's beeping...
> 

When person 'A' calls person 'B' a troll, these are the possibilities:

1. 'A' is indeed a troll

2. 'B' is the troll

3. both 'A' and 'B' are trolls

4. nobody is a troll. they're computer scientists passionate about their 
ideas and they are trying to convince each other.

5. nobody is a troll and there is no trolling going on.

Now, it's rather common to accuse people of trolling these days.
The fact that Markus Wankus said that Ilias is a troll does not mean
that everybody should reply to him in that tone.
This is a one .vs many battle and it sucks.


gerald



From fuzzyman at gmail.com  Wed Feb 23 10:59:31 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 23 Feb 2005 07:59:31 -0800
Subject: user interface for python
In-Reply-To: <1109151356.896348.58940@g14g2000cwa.googlegroups.com>
References: <1109131790.140672.209730@l41g2000cwc.googlegroups.com>
	<1109150221.947518.209220@o13g2000cwo.googlegroups.com>
	<1109151356.896348.58940@g14g2000cwa.googlegroups.com>
Message-ID: <1109174371.046089.187450@g14g2000cwa.googlegroups.com>

Yeah.. Tkinter is nice. Wzx is just as easy though, but scales better
because it's built on wx.

Regards,

Fuzzy
http://www.voidsapce.org.uk/python/index.shtml



From aleaxit at yahoo.com  Sun Feb  6 04:17:31 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 6 Feb 2005 10:17:31 +0100
Subject: Word for a non-iterator iterable?
References: <36lu1cF516qtdU1@individual.net>
Message-ID: <1grk4a5.eq5u5q10cmxktN%aleaxit@yahoo.com>

Leif K-Brooks <eurleif at ecritters.biz> wrote:

> Is there a word for an iterable object which isn't also an iterator, and
> therefor can be iterated over multiple times without being exhausted?
> "Sequence" is close, but a non-iterator iterable could technically 
> provide an __iter__ method without implementing the sequence protocol,
> so it's not quite right.

Not just ``technically'' -- a dict is a good and very common example of
just such a "non-iterator, non-sequence iterable".

As you're focusing on "can be iterated over multiple-times", I like
"re-iterable"; it centers on what you can DO with the object, rather
than quibbling what it ISN'T;-)


Alex


From francis.girard at free.fr  Mon Feb  7 14:58:51 2005
From: francis.girard at free.fr (Francis Girard)
Date: Mon, 7 Feb 2005 20:58:51 +0100
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <20050207185138.GA20602@grulic.org.ar>
References: <dvOMd.33656$EG1.19314@lakeread04>
	<200502071907.12169.francis.girard@free.fr>
	<20050207185138.GA20602@grulic.org.ar>
Message-ID: <200502072058.51513.francis.girard@free.fr>

Le lundi 7 F?vrier 2005 19:51, John Lenton a ?crit?:
> On Mon, Feb 07, 2005 at 07:07:10PM +0100, Francis Girard wrote:
> > Zut !
> >
> > I'm very sorry that there is no good use case for the "reduce" function
> > in Python, like Peter Otten pretends. That's an otherwise very useful
> > tool for many use cases. At least on paper.
> >
> > Python documentation should say "There is no good use case for the reduce
> > function in Python and we don't know why we bother you offering it."
>
> I am guessing you are joking, right? 

Of course I am joking. I meant the exact contrary. Only wanted to show that 
Peter did exaggerate. Thank you for citing me with the full context.

> I think Peter exaggerates when he 
> says that "there will be no good use cases for reduce"; it is very
> useful, in writing very compact code when it does exactly what you
> want (and you have to go through hoops to do it otherwise). It also
> can be the fastest way to do something. For example, the fastest way
> to get the factorial of a (small enough) number in pure python is
>
>   factorial = lambda n: reduce(operator.mul, range(1, n+1))

Great. 

Regards

Francis Girard



From marian at mba-software.de  Thu Feb 10 04:01:47 2005
From: marian at mba-software.de (=?ISO-8859-1?Q?Marian_Aldenh=F6vel?=)
Date: Thu, 10 Feb 2005 10:01:47 +0100
Subject: pyFMOD writing a callback function in Python
Message-ID: <370m88F525p5uU1@individual.net>

Hi,

I am using the FMOD audio-library with the pyFMOD python bindings. pyFMOD uses
ctypes. It is possible to register callback functions with FMOD that are
called at certain points in the processing pipeline or when certain events
happen.

I am expecially interested in the one that fires when a currently playing
stream ends. This is what the declaration in pyFMOD looks like:

   _FSOUND_Stream_SetEndCallback =
      getattr(fmod,"_FSOUND_Stream_SetEndCallback at 12")
   _FSOUND_Stream_SetEndCallback.restype = c_byte
   def FSOUND_Stream_SetEndCallback(stream, callback, userdata):
      result = _FSOUND_Stream_SetEndCallback(c_int(stream), c_int(callback),
                                             c_int(userdata))
      if not result: raise fmod_exception()

I cannot make it work, however. I tried:

   def _sound_end_callback(stream,buf,len,userdata):
     print "_sound_end_callback(): Stream has reached the end."

as simplest possible callback function. I am registering it like this:

   pyFMOD.FSOUND_Stream_SetEndCallback(_currenttrack,_sound_end_callback,0)
				
And this is how my program dies:

   File "d:\projekte\eclipse\workspace\gettone\gettonesound.py", line 175, in 
sound_tick
     pyFMOD.FSOUND_Stream_SetEndCallback(_currenttrack,_sound_end_callback,0)
   File "c:\programme\Python23\lib\site-packages\pyFMOD.py", line 690, in 
FSOUND_Stream_SetEndCallback
     result = _FSOUND_Stream_SetEndCallback(c_int(stream), c_int(callback), 
c_int(userdata))
TypeError: int expected instead of function instance

I am very new to Python and have zero idea what the problem is nor how to
solve it. In some of my other languages I would have to explicitly make a
function pointer and possibly have to cast that to an int to pass it to
SetEndCallback, but that seems very inappropriate in Python...

Ciao, MM
-- 
Marian Aldenh?vel, Rosenhain 23, 53123 Bonn. +49 228 624013.
http://www.marian-aldenhoevel.de
"Wir brauchen keine Opposition, wir sind bereits Demokraten."


From Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org  Thu Feb  3 19:58:10 2005
From: Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org (Alexander)
Date: Fri, 04 Feb 2005 03:58:10 +0300
Subject: dict indexed by lists - ?
References: <MSGID_2=3A5025=2F3.131_4202e613@fidonet.org>
Message-ID: <MSGID_2=3A5025=2F3.131_4202f3d4@fidonet.org>

?????? All!

04 ??????? 2005 ? 02:47, Alexander Zatvornitskiy ? ????? ?????? ? All ?????:
 AZ> I'am trying to make something like this:
 AZ> CPT={ ['b0','c0']:1, ['b0','c1']:0, ['b1','c0']:3, ['b1','c1']:1 }

Thanks, I fix it - i use lists.

 AZ> and, later, modifying it like this:
 AZ>   key[2]=up.next_state()

replaced with:
k=k[:cur_idx-1]+up.next_state()+k[cur_id+1:]

 AZ>   ...
 AZ>   print CPT[key]

 AZ> Any suggestions?


 AZ> Alexander, zatv at bk.ru


Alexander, zatv at bk.ru


From gsakkis at rutgers.edu  Sun Feb 20 22:00:18 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: Sun, 20 Feb 2005 22:00:18 -0500
Subject: How Do I get Know What Attributes/Functions In A Class?
References: <1108870842.095282.54200@z14g2000cwz.googlegroups.com>
	<d1c02$42182841$a228dd19$19743@ispnews.usenetserver.com>
	<1108952515.297032.306980@l41g2000cwc.googlegroups.com>
Message-ID: <37t168F5ibletU1@individual.net>

<steven at lczmsoft.com> wrote in message news:1108952515.297032.306980 at l41g2000cwc.googlegroups.com...
> Thank you Hans.   Could you give me a simple sample of using inspect?
>

http://www.python.org/doc/current/lib/module-inspect.html

George




From EP at zomething.com  Sun Feb  6 17:29:01 2005
From: EP at zomething.com (EP)
Date: Sun, 6 Feb 2005 14:29:01 -0800
Subject: Python versus Perl ?
In-Reply-To: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
Message-ID: <20050206142901.620621043.EP@zomething.com>

surfunbear at yahoo.com asked

> 3. Perl is installed on our system and a lot of other systems.
> You don't have to make sys admins go out of there way to make it
> available. It's usualy allready there. I also did a search of job
> postings on a popular website. 108 jobs where listed that require
> knowledge of Perl, only 17 listed required Python. Becomeing more
> familiar with Perl might then be usefull for ones resume ?

Python is trivial to install on one's workstation or PC, if it isn't already there.  Getting Python on the company's servers can require some IT latitude or buy-in.

<opinion>

I've begun to view the availability of Python on company servers as a measure of an IT organization's fitness.  

Perl was (probably) the right language at the right time at least for cgi work and text processing in the early days of the web, when there was a sudden increase in the need for such work.  And Perl "works", especially as you become familiar with it and some of the non-obvious ways it works.  Learning Perl is an investment and many folks becomes Perl people - why would you switch from anything you've put that much time into?

And so a vast number of people and orgnizations remain in the cave, unwilling to risk going outside, unwilling to believe life could be better out there in the unknown.  Congrats for being the rare person who takes a look.  (That strange feeling you may get is from something we call "sunshine" and, on balance, I think you'll find it is a very nice thing.)
 

>  If Python is better than Perl, I'm curious how really significant
> those advantages are ?

I'd say the advantages are significant if you develop anything complex, or like to think about the software you develop in clean abstractions.  I'd say knowing Python probably does not lead to a higher salary, but that the software engineers attracted to Python tend to be the cream of the crop and are worth more money.


[Disclaimer: Python also attracts some who are not cream of the crop software engineers but rather see things - applications, large or small - that ought to be done, and are looking for the most efficient way of getting there.  Anyone can write some Python succssfully, but not everyone is capable of contributing to PyPy.  Python is a great tool for each.]

</opinon>

Recommendation: Python requires little investment.  Play in it.  Read (briefly) about the aspects that seem interesting.  Try writing a small progam in it.  There are very very few cases where anyone is going to require you to use Python; it's a personal decision, and the people that use Python do so because they want to, not because someone required them to.


cheers/



From cdieterich at geosci.uchicago.edu  Fri Feb  4 23:16:47 2005
From: cdieterich at geosci.uchicago.edu (Christian Dieterich)
Date: Fri, 4 Feb 2005 22:16:47 -0600
Subject: Pickling and inheritance are making me hurt
In-Reply-To: <477dd2xhuk2.ln2@news.conpoint.com>
Message-ID: <C0AFE0DA-772C-11D9-AE19-000A9582377C@geosci.uchicago.edu>

On D? hAoine, Feabh 4, 2005, at 15:48 America/Chicago, Kirk Strauser 
wrote:

> I have a module that defines a Search class and a SearchResult class.  
> I use
> these classes by writing other modules that subclass both of them as 
> needed
> to interface with particular search engines.
>
> My problem is that Search defines a method (called automatically by 
> __del__)
> to save its results between invocations:
>
>     def _saveresults(self):
>         self._oldresults = self._results
>         file = open(self._storefile(), 'w')
>         pickle.dump(self._oldresults, file)
>         file.close()
>
> The problem I'm having is the the pickle.dump call is failing whenever 
> the
> objects in "self.data" are instances of derivatives of SearchResult 
> rather
> than instances of SearchResult itself (which is pretty much always the
> case):
>
>     Exception pickle.PicklingError: <pickle.PicklingError instance at
> 0xb7f7ad6c> in <bound method Search.__del__ of <__main__.Search object 
> at
> 0xb7ec954c>> ignored
>
>
> Now, if I overload _saveresults inside a subclass of Search, then it 
> works.
> It seems like the problem is that _saveresults is only looking inside 
> the
> same namespace as Search (where it's originally defined), even if it's
> actually been inherited by another class in a different module.  Is 
> there a
> way around this?

It's hard to tell exactly what's going on. I have only suggestions what 
you could try to verify.

There was a thread a few days ago, where it was concluded that garbage 
collecting happens in alphabetical order. Can't remember which one it 
was. You could temporarily rename self._result to self.z_result to 
check that.

Here's a gotcha that I had in a similar context. Well, it's logical but 
somehow unexpected. If you do for example
s = Search()
s = Search()
the calling sequence for the constructor and destructor is
__init__()
__init__()
__del__()
Maybe this interferes with pickling your first instance?

Hope this helps debugging,

Christian



From jzgoda at gazeta.usun.pl  Mon Feb 21 15:18:24 2005
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Mon, 21 Feb 2005 21:18:24 +0100
Subject: PyQt Python Bindings for Qt v3.14 Released
In-Reply-To: <mailman.2854.1108891957.22381.python-list@python.org>
References: <mailman.2854.1108891957.22381.python-list@python.org>
Message-ID: <cvdfo2$krv$1@atlantis.news.tpi.pl>

Phil Thompson napisa?(a):

> Riverbank Computing is pleased to announce the release of PyQt v3.14 available 
> from http://www.riverbankcomputing.co.uk/.

Classes generated by puyic 3.13 are not compatible with PyQt 3.14 (some 
method signature incompatibilities). I cann't provide more details, as I 
regenerated all classes from *.ui files, but this may be reproductible.

-- 
Jarek Zgoda
http://jpa.berlios.de/ | http://www.zgodowie.org/


From fredrik at pythonware.com  Fri Feb 11 16:13:44 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 11 Feb 2005 22:13:44 +0100
Subject: is there a safe marshaler?
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl><1108051828.483222.62670@z14g2000cwz.googlegroups.com>
	<420b9281$0$28982$e4fe514c@news.xs4all.nl>
Message-ID: <cuj723$kfb$1@sea.gmane.org>

(repost; gmane seems to have eaten my original post)

Irmen de Jong wrote:

>> I think marshal could be fixed; the only unsafety I'm aware of is that
>> it doesn't always act rationally when confronted with incorrect input
>> like bad type codes or truncated input. It only receives instances of
>> the built-in types and it never executes user code as a result of
>> unmarshalling.
>
> So it is not vulnerable in the way that pickle is? That's a start.
> The security warning in the marsal doc then makes it sound worse than
> it is...

the problem is that the following may or may not reach the "done!" statement,
somewhat depending on python version, memory allocator, and what data you
pass to dumps.

import marshal

data = marshal.dumps((1, 2, 3, "hello", 4, 5, 6))

for i in range(len(data), -1, -1):
    try:
        print marshal.loads(data[:i])
    except EOFError:
        print "EOFError"
    except ValueError:
        print "ValueError"

print "done!"

(try different data combinations, to see how far you get on your platform...)

fixing this should be relatively easy, and should result in a safe unmarshaller (your
application will still have to limit the amount of data fed into load/loads, of course).

</F> 





From kartic.krishnamurthy at gmail.com  Tue Feb  1 16:21:19 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 1 Feb 2005 13:21:19 -0800
Subject: How do you do arrays
In-Reply-To: <tbunce-0102051218150001@192.168.1.12>
References: <tbunce-0102051052450001@192.168.1.12>
	<1107284817.848551.79000@c13g2000cwb.googlegroups.com>
	<tbunce-0102051218150001@192.168.1.12>
Message-ID: <1107292879.436151.47030@c13g2000cwb.googlegroups.com>

Tom - I answered your question even before you posted it!

You have to use iMatrix.append(k) and NOT iMatrix[index] = k.

Also,  what do you expect out of:
while index < majorlop1:
print '- %s %s' % ( iMatrix[index], sep)

This loop will never get executed because your previous loop finishes
due to the same condition index < majorlop1.

I am not sure what book you are using but I don't think it is a very
good one.

>  I would like to set the size of the List/array independent
> of having to intialialize it prior to use.

You can  do the following when you allocate your list.
iMatrix = [''] * size # where size is an integer
and this will give you a list of size empty elements. If you do this,
do not use iMatrix.append(). Use the array notation like you have in
you code currently.

Thanks
-Kartic



From mensanator at aol.com  Thu Feb  3 19:40:57 2005
From: mensanator at aol.com (mensanator at aol.com)
Date: 3 Feb 2005 16:40:57 -0800
Subject: how to generate SQL SELECT pivot table string
References: <1107475373.064794.155030@l41g2000cwc.googlegroups.com>
Message-ID: <1107477657.906912.54080@z14g2000cwz.googlegroups.com>

McBooCzech wrote:
> Hallo all,
>
> I am trying to generate SQL SELECT command which will return pivot
> table. The number of column in the pivot table depends on the data
> stored in the database. It means I do not know in advance how many
> columns the pivot table will have.
>
> For example I will test the database as following:
> SELECT DISTINCT T1.YEAR FROM T1
>
> The SELECT command will return:
> 2002
> 2003
> 2004
> 2005
>
> So I would like to construct following select:
>
> select T1.WEEK,
> SUM (case T1.YEAR when '2002' then T1.PRICE else 0 END) Y_02,
> SUM (case T1.YEAR when '2003' then T1.PRICE else 0 END) Y_03,
> SUM (case T1.YEAR when '2004' then T1.PRICE else 0 END) Y_04,
> SUM (case T1.YEAR when '2005' then T1.PRICE else 0 END) Y_05
> from T1
> group by T1.week
>
> which will return pivot table with 5 columns:
> WEEK, Y_02, Y_03, Y_04, Y_05,
>
> but if the command "SELECT DISTINCT T1.YEAR FROM T1" returns:
> 2003
> 2004
>
> I have to construct only following string:
>
> select T1.WEEK,
> SUM (case T1.YEAR when '2003' then T1.PRICE else 0 END) Y_03,
> SUM (case T1.YEAR when '2004' then T1.PRICE else 0 END) Y_04,
> from T1
> group by T1.week
>
> which will return pivot table with 3 columns:
> WEEK, Y_03, Y_04
>
> Can anyone help and give me a hand or just direct me, how to write a
> code which will generate SELECT string depending on the data stored
in
> the database as I described?
>
> Thanks
>
> Petr McBooCzech

In MS-Access, the appropriate SQL statement is

TRANSFORM Sum(T1.price) AS SumOfprice
SELECT T1.week
FROM T1
GROUP BY T1.week
PIVOT T1.year;

Note the keywords TRANSFORM and PIVOT. These change an
ordinary SELECT query into what Access calls a CROSSTAB
query. In such a query, the number of columns is created
automatically (subject to the limitation of a maximum of
256 columns).

For example, if your T1 table contains:

year	week	price
2002	1	123
2002	10	456
2002	20	254
2002	30	253
2002	40	325
2002	50	111
2003	1	254
2003	10	256
2003	20	854
2003	30	125
2003	40	845
2003	50	562
2004	1	425
2004	10	123
2004	20	212
2004	30	555
2004	40	412
2004	50	852


The query shown will output:

week	2002	2003	2004
1	123	254	425
10	456	256	123
20	254	854	212
30	253	125	555
40	325	845	412
50	111	562	852


Now, if you add another year's worth of data,

year	week	price
2005	1	666
2005	10	555
2005	20	444
2005	30	333
2005	40	222
2005	50	111

the query (without any modiification) will now output

week	2002	2003	2004	2005
1	123	254	425	666
10	456	256	123	555
20	254	854	212	444
30	253	125	555	333
40	325	845	412	222
50	111	562	852	111


If you had multiple records for each year/week you would, of course,
see the aggregate result (in this case, Sum). Watch what happens
when I duplicate the 2005 records:

week	2002	2003	2004	2005
1	123	254	425	1332
10	456	256	123	1110
20	254	854	212	888
30	253	125	555	666
40	325	845	412	444
50	111	562	852	222



From peter at engcorp.com  Sun Feb 27 11:15:22 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sun, 27 Feb 2005 11:15:22 -0500
Subject: PyUnit and multiple test scripts
In-Reply-To: <mailman.3113.1109483262.22381.python-list@python.org>
References: <mailman.3113.1109483262.22381.python-list@python.org>
Message-ID: <j5adnVQUPcaEb7zfRVn-rA@powergate.ca>

Calvin Spealman wrote:
> I'm trying to find the best way to use PyUnit and organize my test scripts.
> What I really want is to separate all my tests into 'test' directories
> within each module of my project. 

The script below will do that.

> I want all the files there to define a
> 'suite' callable and to then all all those suites from all those test
> directories into one big suite and run it all. I'm having trouble with
> this.

It won't do that.  In my own opinion, based on experience, this isn't
even a desirable thing for several reasons.  For one thing, using that
whole "suite" thing seems to be a lot of work for little gain.  The
default "unittest" stuff will already find all classes that are instances
of unittest.TestCase, and will already run all methods in them that
begin with the string "test".  Furthermore, it's often much better to
run different test files using separate processes, mainly to ensure
you don't pollute one test's starting conditions by failing to clean
up stuff (e.g. terminate all threads) from a previous test.

> 1) Is there a very simple way to just take a file path and name, that I
> could use to open the source file, and load it as a module object, no
> strings attached?
> 
> 2) Is there already a framework around that will do what I need?

Try this.  It works here (in a more complex version: this was pruned
for posting here).  Basic conditions: all tests are in subfolders
called "test", and all have a filename ending with _unit.py.  (This
lets me name them based on the module that they are testing.)  You can
change that pattern in the code.  It's possible there are external
dependencies on things unique to my environment, but I've tried
to catch and remove them all.

Note (though it's unrelated to this particular script) that since the
tests run in a subfolder of the folder where the code under test resides,
you need to do the equivalent of "sys.path.append('..')" in each
test file.  I accomplish that by having all import my own library
module called "testbed", which does this during import time:

   srcDir = os.path.abspath('..')
   sys.path.insert(1, srcDir)

Anyway, it might give you some ideas.

'''test runner'''

import os
import sys
import subprocess
import fnmatch


def runTest(path):
     folder, filename = os.path.split(path)
     cmd = [sys.executable, '-u']

     p = subprocess.Popen(cmd + [filename],
         cwd=folder or '.',
         stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
         universal_newlines=True)
     output = []
     line = []
     while True:
         c = p.stdout.read(1)
         if not c:
             break
         if not line:
             sys.stdout.write('--|')
         sys.stdout.write(c)
         line.append(c)
         if c == '\n':
             output.append(''.join(line))
             line = []

     return output


def findfiles(path, pattern):
     '''scan all files and folders below path, returning sorted list of those 
matching pattern'''
     files = []
     match = fnmatch.fnmatch
     for p, ds, fs in os.walk(path):
         for f in fs:
             path = os.path.abspath(os.path.join(p, f))
             if match(path, pattern):
                 print path
                 files.append(path)

     files.sort()
     return files


def run():
     pattern='*/tests/*_unit.py'
     files = findfiles('.', pattern)
     if not files:
         print 'no tests found'
         sys.exit(1)

     print 'running all tests below %s' % os.path.abspath('.')

     try:
         for file in files:
             if not os.path.exists(file):
                 print 'file not found', file
                 continue
             print
             print file
             output = runTest(file)


     except KeyboardInterrupt:
         print 'User aborted test.'


if __name__ == '__main__':
     run()


# EOF


From aleaxit at yahoo.com  Tue Feb  8 03:04:10 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Tue, 8 Feb 2005 09:04:10 +0100
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4207fd24@fidonet.org>
	<UmSNd.104914$Jk5.59261@lakeread01>
	<4208178F.40804@po-box.mcgill.ca>
	<mailman.2137.1107832669.22381.python-list@python.org>
Message-ID: <1grnpna.dwvqwdn50ot0N%aleaxit@yahoo.com>

Terry Reedy <tjreedy at udel.edu> wrote:

> "Brian van den Broek" <bvande at po-box.mcgill.ca> wrote in message 
> news:4208178F.40804 at po-box.mcgill.ca...
> > Is the right way to understand it in this vicinity:
> 
> In the vicinity, but not quite exact
> 
> >At compile time (by which I mean when the Python bytecode is built)
> 
> Compile time is when the def statement is executed

I disagree: compile time is when the compiler is running (for example,
the compiler is the component which diagnoses syntax errors, while other
errors are diagnosed ``at runtime'').

Bytecode is built before def executes -- indeed it's built whether def
executes or not.  Cfr:

>>> def f(wo):
...   if wo:
...     def g(): pass
... 
>>> f.func_code.co_consts
(None, <code object g at 0x382a60, file "<stdin>", line 3>)

the 'def g' hasn't executed (yet?), but the bytecode is built (and
stored as the first constantvalue in f, save the ubiquitous None).

If the ``if wo: def ...'' construct was in a module being imported, the
mechanics would be similar -- although in this case I think you could
tell only if a syntax error was present in the def statement (I may be
wrong, but offhand I don't think the codeobject is saved in this case).

Or, try this one:

>>> c = compile('def x(): pass', '<string>', 'exec')
>>> c
<code object ? at 0x389420, file "<string>", line 1>
>>> c.co_consts
(<code object x at 0x3893e0, file "<string>", line 1>, None)
>>> 

``compile time'' here is when the 'compile' built-in runs; and we can
see the code object ``x'' is already built even though the def has not
been executed yet.


Alex


From donn at drizzle.com  Sun Feb 20 00:35:43 2005
From: donn at drizzle.com (Donn Cave)
Date: Sun, 20 Feb 2005 05:35:43 -0000
Subject: [Fwd: Re: [Uuu-devel] languages] <-- Why Python
References: <mailman.2781.1108677768.22381.python-list@python.org>
	<1108678805.542584.171930@z14g2000cwz.googlegroups.com>
	<mailman.2783.1108679758.22381.python-list@python.org>
	<864qgaisoq.fsf@guru.mired.org>
	<mailman.2785.1108689484.22381.python-list@python.org>
	<86vf8qhcql.fsf@guru.mired.org>
	<mailman.2787.1108691319.22381.python-list@python.org>
	<86r7jdh5vw.fsf@guru.mired.org>
	<mailman.2852.1108869628.22381.python-list@python.org>
Message-ID: <1108877742.416530@yasure>

Quoth Nick Coghlan <ncoghlan at iinet.net.au>:
[... re Python OS interface vs. language-generic model ]

| *Allowing* other languages is one thing, but that shouldn't preclude having a 
| 'default' language. On other OS's, the default language is some form of shell 
| scripting (i.e. Unix shell scripts, or Windows batch files). It would be good to 
| have a real language to fill that role.

I don't know what the Windows version is like, but for all the UNIX
shell's weaknesses, it's very well suited to its role.  The Plan 9
shell (rc) is similar with much improved syntax, and has a distant
relative "es" that I think is the closest thing I've ever seen to
a 1st class language that works as a shell (though the implementation
was only at the proof of concept level.)  (I'm not forgetting REXX,
it's a fairly respectable effort but not 1st class.)

...
| Still, the builtin shell is going to need *some* form of scripting support. An
| if that looks like IPython's shell mode, so much the better.
|
| Anyway, the reason to prefer Python to LISP for something like this, is that 
| Python reads much more naturally for most people, whereas LISP requires that y
| write things 'out of order'.
|
| Compare out-of-the-box Python:
|    a = 1 + 2 + 3 + 4
|
| And out-of-the-box Lisp:
|    (setq a (+ 1 2 3 4))
|
| Which language has the lower barrier for entry? That should be a fairly 
| important consideration for a language that is going to sit at the heart of an OS.

Well, honestly I think that's stretching it.  Your order issue here
seems to apply only to operators, and they don't really figure that
heavily in the kinds of things we normally do with the OS.  The only
operator I can think of in "rc" is ^, an odd sort of string multiplication
thing, and I can't think of any in the original Bourne shell.

Meanwhile, the idea that barriers to entry are built out of things like
"+ 1 2 3 4" vs. "1 + 2 + 3 + 4" is really quite open to question.

10 years ago when BeOS was a little hotter than it is today, there were
a couple enthusiasts pushing Python as an official language.  A few of
the people following BeOS at that point had come from a strong Amiga
background, and I remember one of them arguing vehemently against Python
because its arcane, complicated syntax was totally unsuited to casual use.
Compared to, say, REXX.

Now, we Python users know very well that's not true, Python's as clear
as could be.  But theoretically, if you wanted to talk about order
issues, for example ... is it really easier to understand when a language
sometimes expresses a function f over x and y this way
    f(x, y)
sometimes this way (+ is a function, really)
    x f y
and sometimes this way
    x.f(y)
?

I don't know, I'm just thinking that while Python's notation might
be just fine for people who've gotten here the way most of us have,
it's not obvious from this that it's just fine 4 everyone.

	Donn Cave, donn at u.washington.edu


From skip at pobox.com  Tue Feb  1 22:11:32 2005
From: skip at pobox.com (Skip Montanaro)
Date: Tue, 1 Feb 2005 21:11:32 -0600
Subject: Next step after pychecker
In-Reply-To: <200502012113.26393.francis.girard@free.fr>
References: <41ff0308$0$6503$636a15ce@news.free.fr>
	<cto5b9$hpi$1@swifty.westend.com> <369mivF4ubv6mU1@individual.net>
	<200502012113.26393.francis.girard@free.fr>
Message-ID: <16896.17636.292712.594184@montanaro.dyndns.org>


    Francis> "Every well-formed expression of the language can be assigned a
    Francis> type that can be deduced from the constituents of the
    Francis> expression alone." Bird and Wadler, Introduction to Functional
    Francis> Programming, 1988

    Francis> This is certainly not the case for Python since one and the
    Francis> same variable can have different types depending upon the
    Francis> execution context. Example :

    Francis> 1- if a is None:
    Francis> 2-   b = 1
    Francis> 3- else:
    Francis> 4-   b = "Phew"
    Francis> 5- b = b + 1

    Francis> One cannot statically determine the type of b by examining the
    Francis> line 5- alone.

Do you have an example using a correct code fragment?  It makes no sense to
infer types in code that would clearly raise runtime errors:

    >>> "Phew" + 1
    Traceback (most recent call last):
      File "<stdin>", line 1, in ?
    TypeError: cannot concatenate 'str' and 'int' objects

Also, note that the type assigned to an expression may be nothing more than
"object".  Clearly that wouldn't be very helpful when trying to write an
optimizing compiler, but it is a valid type.

Skip


From fredrik at pythonware.com  Fri Feb 11 14:58:39 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 11 Feb 2005 20:58:39 +0100
Subject: check if object is number
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
Message-ID: <cuj2la$3v6$1@sea.gmane.org>

Steven Bethard wrote:

> Is there a good way to determine if an object is a numeric type? Generally, I avoid type-checks in 
> favor of try/except blocks, but I'm not sure what to do in this case:
>
>     def f(i):
>         ...
>         if x < i:
>             ...
>
> The problem is, no error will be thrown if 'i' is, say, a string:
>
> py> 1 < 'a'
> True
> py> 10000000000 < 'a'
> True
>
> But for my code, passing a string is bad, so I'd like to provide an appropriate error.

assert operator.isNumberType(i)

(but make sure you read the warning in the docs:
http://docs.python.org/lib/module-operator.html )

</F> 





From nospam at me.invalid  Sun Feb 27 11:34:25 2005
From: nospam at me.invalid (anthonyberet)
Date: Sun, 27 Feb 2005 16:34:25 +0000
Subject: TKinter
Message-ID: <38eb4lF5nldh7U1@individual.net>

So, is it pronounced 'Tee-Kinter', or 'Tee-Kay-Inter'?
I don't want to appear as a dork down the pub.


From fuzzyman at gmail.com  Fri Feb  4 10:21:29 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 4 Feb 2005 07:21:29 -0800
Subject: IPython colors in windows
In-Reply-To: <36hculF51ho2sU1@individual.net>
References: <opslndb7l9ej1m1c@ashot>
	<1107487113.732375.110850@c13g2000cwb.googlegroups.com>
	<opslnmywarej1m1c@ashot>
	<mailman.1865.1107491434.22381.python-list@python.org>
	<opsln54fpwej1m1c@ashot> <36hculF51ho2sU1@individual.net>
Message-ID: <1107530489.308497.103530@g14g2000cwa.googlegroups.com>

Are you really using the readline module from newcenturycomputers ?
I've got a feeling that's broken and you need to use the Gary Bishop
one with IPython....

Sorry if this is spurious... (restricted internet access, so I can't
check for you... but the correct one is linked to from the IPython
site).

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml

Claudio Grondi wrote:
> Hi,
>
> I have watched this thread hoping to get an
> hint on my problem, but it seems I didn't.
>
> My problem is, that the background of part of
> the error messages is always black
> (e.g. after typing In [1]: sdfsdf)
> and my monitor failes to show the red, green
> texts on black background clearly enough
> to see it (I can read it after selection, which
> inverts the colors).
> I have tried to play with PyColorize.py,
> LightBGColors = ColorScheme(
>     'LightBG',{
>     token.NUMBER     : Colors.Cyan,
>     token.OP         : Colors.Blue,
>     token.STRING     : Colors.Blue,
>     tokenize.COMMENT : Colors.Red,
>     token.NAME       : Colors.White, # Colors.Black,
>     token.ERRORTOKEN : Colors.Red,
>
>     _KEYWORD         : Colors.Green,
>     _TEXT            : Colors.Blue,
>
>     'normal'         : Colors.White # Colors.Normal  # color off
(usu.
> Colors.Normal)
>     }
> but without success.
> How can I get rid of the black background
>
"---------------------------------------------------------------------------
> "
> "exceptions.NameError"                                 Traceback
(most
> recent call last)
> in with quotation marks marked areas?
> Where is the color of the background of this
> areas defined?
> The color scheme seems to handle only the
> text colors, not the background.
>
> Claudio
>
> "Ashot" <ashot at removemolsoftthis.com> schrieb im Newsbeitrag
> news:opsln54fpwej1m1c at ashot...
> > yea, I've done that. It must be something subtle, as the colors and
tab
> > completion works.
> > On Thu, 03 Feb 2005 20:31:37 -0800, DogWalker
<forestiero at qwest.net>
> wrote:
> >
> > > "Ashot" <ashot at removemolsoftthis.com> said:
> > >
> > >> On 3 Feb 2005 19:18:33 -0800, James <fphsml at gmail.com> wrote:
> > >>
> > >>>
> > >>> Ashot wrote:
> > >>>> I am using IPython in windows and the LightBG setting doesn't
> > >>> correctly
> > >>>> because the background of the text is black even if the
console
> > >>> background
> > >>>> is white.  Anyone know whats going on?  Thanks.
> > >>>>
> > >>>> --
> > >>>> ==============================
> > >>>> Ashot Petrosian
> > >>>> University of Texas at Austin, Computer Sciences
> > >>>> (views expressed are solely my own)
> > >>>> ==============================
> > >>>
> > >>> Did you try installing readline for windows?
> > >>> http://newcenturycomputers.net/projects/readline.html
> > >>>
> > >>
> > >> yea I've installed that and ctypes.  The color and tab
completion work,
> > >> its just that colored get displayed with black background, it
almost
> > >> works
> > >> so its very frustrating..
> > >>
> > >
> > > Did you try the following (from the manual)?:
> > >
> > > Input/Output prompts and exception tracebacks
> > >
> > >
> > > You can test whether the colored prompts and tracebacks work on
your
> > > system interactively by typing '%colors Linux' at the prompt (use
> > > '%colors LightBG' if your terminal has a light background). If
the input
> > > prompt shows garbage like:
> > > [0;32mIn [[1;32m1[0;32m]: [0;00m
> > >  instead of (in color) something like:
> > >  In [1]:
> > >   this means that your terminal doesn't properly handle color
escape
> > > sequences. You can go to a 'no color' mode by typing '%colors
NoColor'.
> > >
> > >
> > >   You can try using a different terminal emulator program. To
> > > permanently set your color preferences, edit the file
> > > $HOME/.ipython/ipythonrc and set the colors option to the desired
value.
> >
> >
> >
> > --
> > ==============================
> > Ashot Petrosian
> > University of Texas at Austin, Computer Sciences
> > (views expressed are solely my own)
> > ==============================



From deetsNOSPAM at web.de  Tue Feb  8 10:01:15 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Tue, 08 Feb 2005 16:01:15 +0100
Subject: Loop in list.
References: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
Message-ID: <36s2b2F53f67pU1@individual.net>

Jim wrote:

> Where did this type of structure come from:
> 
> mat = ['a' for i in range(3)]    ?
> 
> This will produce a list of three elements but
> I don't see reference for it in any of the books.

Its called a list-comprehension. And as I don't know what books you mean, I
can't say if its covered there or not.

-- 
Regards,

Diez B. Roggisch


From test1dellboy3 at yahoo.co.uk  Thu Feb  3 16:59:19 2005
From: test1dellboy3 at yahoo.co.uk (test1dellboy3 at yahoo.co.uk)
Date: 3 Feb 2005 13:59:19 -0800
Subject: python-mode tab completion problem
Message-ID: <1107467959.821309.102850@z14g2000cwz.googlegroups.com>

Hi,

I am exploring python-mode on emacs. When I open foo.py in emacs and
hit C-!, it starts the python interpreter in another window. Next, I
execute -

import rlcompleter, readline
readline.parse_and_bind('tab: complete')

Now I will test the completion by trying to complete sys.v (which could
be sys.version or sys.version_info). It works find when I run the
python interpreter from a terminal, by in python-mode, I get -

import sys
sys.v [tab][enter]
'2.3.4 (#2, Jan  5 2005, 08:24:51) \n[GCC 3.3.5 (Debian 1:3.3.5-5)]'

sys.v [tab][tab][enter]
'2.3.4 (#2, Jan  5 2005, 08:24:51) \n[GCC 3.3.5 (Debian 1:3.3.5-5)]'

sys.v [tab][tab][[tab][enter]

sys.version       sys.version_info
'2.3.4 (#2, Jan  5 2005, 08:24:51) \n[GCC 3.3.5 (Debian 1:3.3.5-5)]'

I see that it is doing the completion, but it doesn't show me the
choices before I hit enter, instead it moves the cursor one tab stop to
the right. Any ideas?

Thanks in advance



From t-meyer at ihug.co.nz  Tue Feb 22 20:50:27 2005
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Wed, 23 Feb 2005 14:50:27 +1300
Subject: Dealing with config files what's the options
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E80222896D@its-xchg4.massey.ac.nz>
Message-ID: <ECBA357DDED63B4995F5C1F5CBE5B1E801DAFEB4@its-xchg4.massey.ac.nz>

> How are the expert pythoneers dealing with config files?
[...]

You can just "import ConfigParser", or look at the various alternatives:

<http://www.python.org/moin/ConfigParserShootout>

=Tony.Meyer



From jinty at web.de  Sat Feb 26 21:31:54 2005
From: jinty at web.de (Brian Sutherland)
Date: Sun, 27 Feb 2005 03:31:54 +0100
Subject: Making a calendar
In-Reply-To: <422071d5$0$22691$ba624c82@nntp04.dk.telia.net>
References: <422071d5$0$22691$ba624c82@nntp04.dk.telia.net>
Message-ID: <20050227023154.GA15400@minipas>

On Sat, Feb 26, 2005 at 01:57:20PM +0100, Pete..... wrote:
> I'm trying to make a calendar for my webpage, python and html is the only 
> programming languages that I know, is it possible to make such a calendar 
> with pythong code and some html.
> 
> The Idea is that when I click the link calendar on my webpage, then the user 
> will be linked to the calendar.
> 
> The calendar should show one month at the time, and the user should be able 
> to browse to the other month.
> 
> I will make a script that puts events and such into a db ( I know how to do 
> this)
> 
> Then I need a script that puts the events from the db into the calendar, if 
> every day in the calendar has a value id that part will not be hard.

All this and more (perhaps overkill):

http://www.schooltool.org/schoolbell

-- 
Brian Sutherland

It's 10 minutes, 5 if you walk fast.


From http  Sun Feb 20 10:09:31 2005
From: http (Paul Rubin)
Date: 20 Feb 2005 07:09:31 -0800
Subject: BaseHTTPServer threading using SocketServer.ThreadingMixIn
References: <1108910973.117326.206390@f14g2000cwb.googlegroups.com>
Message-ID: <7x1xbbw9n8.fsf@ruckus.brouhaha.com>

"Tortelini" <leo.hatvani at gmail.com> writes:
> I am making custom web server using HTTPServer and want to be able to
> access it simultaneously from different computers. To achieve
> multithreading, I have been experimenting with ThreadingMixIn from
> SocketServer, but it doesn't seem to work, 

One common error is to define your class as something like:

  class myServer(HTTPServer, ThreadingMixin): ...

You have to put ThreadingMixin first, since it overrides methods of
TCPServer:

  class myServer(ThreadingMixin, HTTPServer): ...


From jerf at jerf.org  Thu Feb  3 18:34:51 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 03 Feb 2005 18:34:51 -0500
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
	<7xy8e5jagh.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2005.02.03.23.34.45.544501@jerf.org>

On Thu, 03 Feb 2005 19:00:30 -0800, Paul Rubin wrote:
> Hmm, I'm not familiar with Nevow.  Twisted is pretty neat, though
> confusing.  I don't see how to scale it to multiple servers though.

Same way you'd scale any webserver, load balancing in hardware, store all
user state in a database, and tell the load balancer to try to "persist"
a user's connection to a machine, so Twisted doesn't even have to go back
to the server then?

I'm going to assume you know about this if you deal with large websites
professionally, so I'm curious as to why this is inadequate for your
needs? (If it's too detailed, no answer requested then, but if it's fast
to explain I'm intrigued.)


From rmb25612 at yahoo.com  Mon Feb 21 11:56:16 2005
From: rmb25612 at yahoo.com (rmb25612 at yahoo.com)
Date: 21 Feb 2005 08:56:16 -0800
Subject: IDLE Problem: win98\Python2.4
In-Reply-To: <22eSd.1969$MY6.1483@newsread1.news.pas.earthlink.net>
References: <22eSd.1969$MY6.1483@newsread1.news.pas.earthlink.net>
Message-ID: <1109004976.267201.200950@z14g2000cwz.googlegroups.com>


kim kubik wrote:
> This sure seems like it would have been
> brought up but I checked Google Groups
> (the dejanews replacement) and saw
> nothing:  I installed Python2.4 in Win98
> and IDLE doesn't work (neither does the
> online manual even tho a 3.6KB Python24.chm
> is there, but that's a story for another
> day) - that is, clicking on the IDLE icon
> in the Start menu just gives a brief hourglass
> cursor and then nothing . . .

Are you also running Ruby? The Ruby bundle for MS Windows has caused
problems with it's TCL package conflicting with Python's.

Search comp.lang.python on Google Groups for: Ruby TCL



From apocalypznow at gmail.com  Tue Feb  8 04:39:17 2005
From: apocalypznow at gmail.com (apocalypznow)
Date: Tue, 08 Feb 2005 01:39:17 -0800
Subject: re-entrancy question
Message-ID: <cua19j$ban$1@sea.gmane.org>

I have a program that instantiates some objects and runs a main loop. 
Before the main loop starts, I create a thread that listens to TCP 
connections on a port.  If any connections are made, and depending on 
the data, I call methods on some of those objects.

I am worried that calling methods on objects from outside the main loop, 
but that are also operated on in the main loop, could cause problems.

My questions:
1) is this safe?
2) what kind of problems could occur?
3) how do I safely handle this?



From enleverlesO.OmcO at OmclaveauO.com  Tue Feb  8 19:12:28 2005
From: enleverlesO.OmcO at OmclaveauO.com (Do Re Mi chel La Si Do)
Date: Wed, 9 Feb 2005 01:12:28 +0100
Subject: PHP Embedded In Python
References: <1107814685.908990.58410@z14g2000cwz.googlegroups.com>
Message-ID: <42095579$0$28560$8fcfb975@news.wanadoo.fr>

And :

    http://lesuisse.net/pyphp-0.1.tgz

?


@-salutations
-- 
Michel Claveau




From briancolfer at comcast.net  Thu Feb 10 04:14:25 2005
From: briancolfer at comcast.net (Brian Colfer)
Date: Thu, 10 Feb 2005 01:14:25 -0800
Subject: How to quit a Tkinter application
Message-ID: <001001c50f50$ede56000$0202a8c0@sisley>

If I set up a menu item to Exit and use root.quit the application quits but
I get a thread terminated abnormaly error.
 
BTW I'm using Pmw to create the menu and items.
 

================================
primary email:  <mailto:BrianColfer at comcast.net> BrianColfer at comcast.net
blog: http://briancolferblog.blogspot.com/
Mobile: (415) 613-3669


 
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From gsakkis at rutgers.edu  Sat Feb  5 21:24:41 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: Sat, 5 Feb 2005 21:24:41 -0500
Subject: Swig-friendly distutils.command.build_ext
Message-ID: <36ldetF52d8abU1@individual.net>

I'm using a custom extension of the build_ext distutils 'command' that integrates better with SWIG.
Specifically, it:

1. Adds '-I' (include) swig option for each directory containing a source file in the given
Extension.
2. Determines whether to add the '-c++" option by checking the source file extensions (even if the
'swig_cpp' and 'swig_opts' do not explicitly specify that it is a c++ wrapper).
3. Builds the swig-generated high-level python module (currently only the low level .dll/.so is
built).

If these changes are generally useful, I think they (c|sh)ould make it into the next release of
distutils.

George




From mefjr75 at hotmail.com  Fri Feb  4 00:03:49 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 3 Feb 2005 21:03:49 -0800
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
	<7xy8e5jagh.fsf@ruckus.brouhaha.com>
Message-ID: <1107490165.178237.169730@f14g2000cwb.googlegroups.com>

Paul Rubin wrote:
> Yes, good point about html tables, though I'm concerned primarily
> about server response.  (It's off-topic, but how do you use CSS to
get
> the effect of tables?)
To emulate a table you use the div and span tag.
(really you can do just about anything with div and span)
Div is a block level tag and span isn't.
You can also group them  together and nest them.
div and span have little meaning but the can be styled.
In the CSS declaration we create styles and then just use them later as
needed.
Try to always focus on layout first and actual style later. (CSS is all
about seperation of concerns)
You will find the verbosity of CSS is not as annoying as you might
think it might be, it is quite easy to learn and well worth the effort.
Ok here is a bad example ( do a search on Google for CSS tables ).
( this was torn out of a webapp I am working on )
.<div class='panel'>
.  <div class="archivehead"><strong>
.    <span class="leftspace">Archive</span>
.    <span class="rightspace">Entry Date</span>
.    </strong>
.  </div>
.      <div class="archivelite">
.        <span class="bold">%s</span><span>
.        <strong>%s</strong>
.        </span><span class="right">%s</span>
.      </div>
.      <div class="archivedark">
.        &nbsp &nbsp &nbsp &nbsp posted by: %s
.        <span class="right">
.        <strong>text </strong>
.        <strong> %s</strong>
.        </span>
.      </div>
.</div>
And here is some of the CSS
( these are classes the dot in front of the name tells you that, when
combined with div or span just about anything is possible. )
.  .panel {
.        border: solid thin #666677;
.        margin: 2em 4em 2em 4em;}
.  .leftspaces {
.        letter-spacing:.5em;
.        text-decoration:none;
.        color:#EEEEff;}
.  .rightspaces {
.        letter-spacing:.5em;
.        position: absolute;
.        right: 5em;
.        text-decoration: none;
.        color:#EEEEff;}
.
.  .archivehead {
.         text-indent:.5em;
.         background-color:#333333;}
.  .archivelite {
.         color:#777777;
.         text-indent:.5em;
.         background-color:#222222;}
.  .archivedark {
.         color:#777777; text-indent:.5em;
.         background-color:#111111;}
.  .archivelite a{
.         color:#BBBBDD;
.         text-decortation:none;
.         background-color:#222222;}
.  .archivedark a{
.         color:#BBBBDD;
.         text-decortation:none;
.         background-color:#111111;}
hth,
M.E.Farmer



From grante at visi.com  Thu Feb 17 16:10:02 2005
From: grante at visi.com (Grant Edwards)
Date: 17 Feb 2005 21:10:02 GMT
Subject: How to wrap a class's methods?
References: <4214f167$0$44618$a1866201@visi.com> <pgbfe2-gl8.ln1@valpo.de>
Message-ID: <4215082a$0$46531$a1866201@visi.com>

On 2005-02-17, Mathias Waack <M.Waack at gmx.de> wrote:

> How about using a delegator: 
>
> class Wrapper:
>   funcs = ("login", "list", "search")
>   def __init__(self, classobj):
>     self.__wrapped = classobj()
>   def __getattr__(self, attr):
>     if attr in Wrapper.funcs:
>       def f(*args):
>         f1 = getattr(self.__wrapped, attr)
>         s,r = f1(args)
>         if s != 'OK': raise NotOk((s,r))
>         return r
>       return f
>     # raise some exception here
> imap = Wrapper(imaplib.IMAP4_SSL)
>
> If you wrap all methods you can ignore the if-test.

I'm not, and the other methods should behave "normally":

class Wrapper:
  funcs = ("login", "list", "search")
  def __init__(self, classobj):
    self.__wrapped = classobj()
  def __getattr__(self, attr):
    if attr in Wrapper.funcs:
      def f(*args):
        f1 = getattr(self.__wrapped, attr)
        s,r = f1(args)
        if s != 'OK': raise NotOk((s,r))
        return r
    else:
      f = getattr(self.__wrapped, attr)
    return f

> PS: note that we're wrapping the instance's methods, not the class's
> methods!

You're right.

-- 
Grant Edwards                   grante             Yow!  "THE LITTLE PINK
                                  at               FLESH SISTERS," I saw them
                               visi.com            at th' FLUROESCENT BULB
                                                   MAKERS CONVENTION...


From richie at entrian.com  Thu Feb  3 07:58:16 2005
From: richie at entrian.com (Richie Hindle)
Date: Thu, 03 Feb 2005 12:58:16 +0000
Subject: IDLE history, Python IDE, and Interactive Python with Vim
In-Reply-To: <0%oMd.102684$Jk5.10686@lakeread01>
References: <opsllommgvb1cml1@ashot>
	<mailman.1807.1107431067.22381.python-list@python.org>
	<0%oMd.102684$Jk5.10686@lakeread01>
Message-ID: <rm7401dsmss18flurp3j3thr7fut9gmdun@4ax.com>


[Steve]
> The history is required to be available in a chunk, to copy and paste 
> into a file.

I see, sorry, I didn't catch that the first time round.

(In PyCrust you can use Alt+LeftDrag to copy a rectangular selection -
 you'll still need to remove any output, but at least you can get rid of
 the >>> prompts in one go.)

-- 
Richie Hindle
richie at entrian.com



From martin.sand.christensen at gmail.com  Thu Feb 17 11:23:22 2005
From: martin.sand.christensen at gmail.com (Martin Christensen)
Date: Thu, 17 Feb 2005 17:23:22 +0100
Subject: Getting milliseconds in Python
References: <1108565135.167562.196830@z14g2000cwz.googlegroups.com>
	<37h5epF5ck38lU2@individual.net>
	<1108571009.698970.152020@z14g2000cwz.googlegroups.com>
	<cv0100$715$1@eeyore.INS.cwru.edu>
	<mailman.2706.1108577006.22381.python-list@python.org>
	<cv0gru$802$1@eeyore.INS.cwru.edu>
	<slrnd19d00.1ep.curty@einstein.electron.net>
	<cv2dkb$97g$1@eeyore.INS.cwru.edu>
Message-ID: <87d5uzyx39.fsf@gmail.com>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

>>>>> "Brian" == Brian Beck <exogen at gmail.com> writes:
Brian> Despite a millisecond being a thousandth of a second [...]

A math teacher! A math teacher! My kingdom for a math teacher!

Martin

- -- 
Homepage:       http://www.cs.auc.dk/~factotum/
GPG public key: http://www.cs.auc.dk/~factotum/gpgkey.txt
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.5 (GNU/Linux)
Comment: Using Mailcrypt+GnuPG <http://www.gnupg.org>

iEYEARECAAYFAkIUxPkACgkQYu1fMmOQldXH3QCdGcw3grK/R17kfakMBhxU1Io/
4ukAoJl+gysL9q/6j1G8LYPZz7NawEV+
=1CNL
-----END PGP SIGNATURE-----


From tbunce at mac.com  Tue Feb  1 13:52:45 2005
From: tbunce at mac.com (Thomas Bunce)
Date: Tue, 01 Feb 2005 10:52:45 -0800
Subject: How do you do arrays
Message-ID: <tbunce-0102051052450001@192.168.1.12>

I am new at Pyton and I am learning from book not classes
so please forgive my being slow

The below does not work I get an Error of  File 
"Matrix[index] = k
NameError: name 'iMatrix' is not defined"

while  index < majorlop1:
   index = index + 1
   k = random.choice(listvalues) + 1
   iMatrix[index] = k

The book statement of 
 array(typecode, initializer) does not make sence
to me how it henerates ore relaes to the org name 
for the array.

Thank You
     Tom


From almad at include.cz  Mon Feb  7 12:47:58 2005
From: almad at include.cz (Almad)
Date: Mon, 07 Feb 2005 18:47:58 +0100
Subject: Python on WWW - beginners question: what to choose?
References: <cu82v8$2f17$1@news.vol.cz> <gcqdnZT6jscUAZrfRVn-gw@rogers.com>
Message-ID: <cu89kf$2j8r$1@news.vol.cz>

Dan Perl wrote:
> Have you looked at these links?
>     http://www.python.org/pycon/papers/framework/web.html
> Dan

Thank You, I haven't found this one...exactly what I was looking for. 

-- 

Lukas "Almad" Linhart

[:: http://www.almad.net/ ::]
[:: The stars are constantly shining, but often we do not see them until the
dark hours. ::]
[:: PGP/GNUPg key: http://www.almad.net/download/pubkey.asc ::]


From jacek.generowicz at cern.ch  Tue Feb  1 05:59:31 2005
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 01 Feb 2005 11:59:31 +0100
Subject: Next step after pychecker
References: <41ff0308$0$6503$636a15ce@news.free.fr>
	<7xis5cq5bj.fsf@ruckus.brouhaha.com>
Message-ID: <tyffz0gmtpo.fsf@pcepsft001.cern.ch>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> Philippe Fremy <phil at freehackers.org> writes:
> > I would like to develop a tool that goes one step further than
> > pychecker to ensure python program validity. The idea would be to get
> > close to what people get on ocaml: a static verification of all types
> > of the program, without any kind of variable declaration. This would
> > definitely brings a lot of power to python.
> 
> You know, I've always thought that ML-style type inference is an
> impressive technical feat, but why is it so important to not use
> declarations?  This is an aspect I've never really understood.

You gain something akin to duck typing, though in a formalized way
(type classes). The code works for any types which provide the
features which are used in the code, without regard for the specific
type. You gain generic programming.

You also gain not having to clutter your code with all the type
declarations. And you gain not having to decide what types you will
use too early on in development.


From bvande at po-box.mcgill.ca  Tue Feb 22 05:04:36 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Tue, 22 Feb 2005 05:04:36 -0500
Subject: NOOB coding help....
In-Reply-To: <03f8baafb2634534c398d3ddcc476158@localhost.talkaboutprogramming.com>
References: <69012ed09e48920e1e80e311bca1659c@localhost.talkaboutprogramming.com>
	<sKGdnSm3e5NyK4ffRVn-2g@comcast.com>
	<03f8baafb2634534c398d3ddcc476158@localhost.talkaboutprogramming.com>
Message-ID: <421B03B4.30306@po-box.mcgill.ca>

Igorati said unto the world upon 2005-02-22 03:51:
> #This program will ask for a user to imput numbers. The numbers will then
> be calculated
> #to find the statistical mean, mode, and median. Finallly the user will be
> asked
> #if he would like to print out the answers.
> numbers = [ ] 
> print 'Enter numbers to add to the list. (Enter 0 to quit.)'
> def getint():
>      return int(raw_input('Number? '))
> 
> numbers = sorted(iter(getint, 0))
> 
> numbers
> [2, 3, 5, 7]
> def variable_median(x):
>      
>      return sorted(x)[len(x)//2]
> def variable_mode(x):
>      
>      counts = {}
>      for item in x:
>          counts[x] = counts.get(x, 0) + 1
>      
>      return sorted(counts, key=counts.__getitem__, reverse=True)[0]
> 
> 
> 
> s = variableMean(numbers)
> y = variableMedian(numbers)
> t = variableMode (numbers)
> 
> import pickle
> pickle.dump((s, y, t), file('avg.pickle', 'w'))
> 
> 
> print 'Thank you! Would you like to see the results after calculating'
> print 'The mode, median, and mean? (Please enter Yes or No)'
> print 'Please enter Yes or No:'
> 
> 
> if raw_input == yes:
> 
>     f = open("avg.py","r")
>     avg.py = f.read()
>     print 'The Mean average is:', mean
>     print 'The Median is:', meadian
>     print 'The Mode is:', mode
> 
> 
> I got the error:
> 
> Traceback (most recent call last):
>   File "C:\Python24\Lib\New Folder\Wade_StoddardSLP3-2.py", line 9, in ?
>     numbers = sorted(iter(getint, 0))
>   File "C:\Python24\Lib\New Folder\Wade_StoddardSLP3-2.py", line 7, in
> getint
>     return int(raw_input('Number? '))
> TypeError: 'str' object is not callable
> 
> and this one for my if statement:
> 
> Traceback (most recent call last):
>   File "C:\Python24\Lib\New Folder\Wade_StoddardSLP3-2.py", line 39, in ?
>     if raw_input == Yes:
> NameError: name 'Yes' is not defined
> 
> I cannot understand how I can define yes so that when they type yes the
> data is printed out. Also if they type no how do I make the program do
> nothing. Or is that just infered.

Hi,

have you tried examining the objects you are trying to put together to 
see why they might not fit?

For instance, look what happens when you run this, entering 42 at the 
prompt:

ri = raw_input('Gimme!    ')
print type(ri)
print type(int(ri))
print ri == 42
print ri == '42'
name_not_defined_in_this_code

Does looking at the output of that help?

Best,

Brian vdB



From miki.tebeka at zoran.com  Thu Feb  3 03:31:46 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Thu, 3 Feb 2005 10:31:46 +0200
Subject: Finding user's home dir
In-Reply-To: <5i9rtc.rq31.ln@orion.homeinvalid>
References: <5i9rtc.rq31.ln@orion.homeinvalid>
Message-ID: <20050203083122.GM2416@zoran.com>

Hello Nemesis,

> Hi all, I'm trying to write a multiplatform function that tries to
> return the actual user home directory.
> ...
What's wrong with:
    from user import home
which does about what your code does.

Bye.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys


From kartic.krishnamurthy at gmail.com  Wed Feb  9 16:11:12 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 9 Feb 2005 13:11:12 -0800
Subject: Help: retrieving e-mail from yahoo pop server. what's wrong?
In-Reply-To: <q6idnUufKYXN8pffRVn-pA@rcn.net>
References: <q6idnUufKYXN8pffRVn-pA@rcn.net>
Message-ID: <1107983472.417329.292750@l41g2000cwc.googlegroups.com>

Andre,

Do you have a premium Yahoo account? Only premium users can access
Yahoo mail via POP3. If you are a premium account holder and it still
is not working, print out your password to see if you typed the correct
password.

Have you tried accessing your Yahoo from an email client? Does that
work?

Thanks,
-Kartic



From simoninusa2001 at yahoo.co.uk  Wed Feb  9 23:47:38 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 9 Feb 2005 20:47:38 -0800
Subject: PyQt and Python 2.4 - also WinXP LnF?
References: <1108003471.242829.297030@o13g2000cwo.googlegroups.com>
	<mailman.2284.1108007655.22381.python-list@python.org>
Message-ID: <1108010858.887829.240990@z14g2000cwz.googlegroups.com>

Yeah I had a look at the Qt Free/Win project, but I think it offers me
less than the current official 3.12 from BlackAdder, which is only $80
without the hassle of following those convoluted build instructions (I
did try yesterday).

As far as XMMS/Gtk goes, it's a remote client for XMMS, designed to be
run across a network, so it doesn't really matter about using the same
toolkit. Plus all the problems with XMMS seem to lie with Gtk1
(whenever it crashes, the errors always come from Gtk!)

I was looking at the Gtk2 fork XMMS2, which seems to provide network
control like the InetCtrl plugin for XMMS1, but I'm still not keen on
Gtk as it looks so weird outside of Linux.



From follower at gmail.com  Tue Feb 15 02:09:03 2005
From: follower at gmail.com (Follower)
Date: 14 Feb 2005 23:09:03 -0800
Subject: gui scripting
References: <1108381881.828494.98340@c13g2000cwb.googlegroups.com>
	<gm27e2-m6i.ln1@lairds.us>
Message-ID: <3c18c08f.0502142309.3e52fdbe@posting.google.com>

> >Second phase will have this done on a Windows platform... but that is
> >second priority ...
<http://www.brunningonline.net/simon/blog/archives/winGuiAuto.py.html>

<http://www.tizmoi.net/watsup/intro.html>

--Phil.


From flupke at nonexistingdomain.com  Thu Feb 10 10:33:55 2005
From: flupke at nonexistingdomain.com (flupke)
Date: Thu, 10 Feb 2005 15:33:55 GMT
Subject: python equivalent to access reports
Message-ID: <D9LOd.8257$yJ7.474177@phobos.telenet-ops.be>

Hi,

a lot of applications here a made with access. Tables, forms, reports 
and the like. Now i rather use Python to do this but i'm not sure how to 
proceed. I can use wxPython for a gui via wxGlade for rapid testing and 
design (forms), MySQL as db (tables) but the report part is what's 
bothering me.
The only semi easy way that i see is by making html files with the 
results in and then opening a browser to display the result.
But this would lack nice printing as there is no way to cleanly start a 
new page.

Any other ideas?

Thanks,
Benedict


From steve at holdenweb.com  Fri Feb 25 08:43:36 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 25 Feb 2005 07:43:36 -0600
Subject: xhtml-print parser
In-Reply-To: <cvn6f6$pdv$1@gemini.csx.cam.ac.uk>
References: <1109333074.548547.171090@f14g2000cwb.googlegroups.com>
	<cvn6f6$pdv$1@gemini.csx.cam.ac.uk>
Message-ID: <cvn9pt$usp$1@sea.gmane.org>

Michael Hoffman wrote:

> p.nagarajkumar at gmail.com wrote:
> 
>> my question is i have parsed the xhtml data stream using c
> 
> 
> That's not a question. And this is a language for discussing
> Python, not C.
> 
Whoa, there! Ease off that trigger-finger, pardner ...

>> i need to diplay the content present in the command prompt as the data
>> present in the webpage as links how it can be done?
> 
Looks like a question to me ...
> 
> http://www.catb.org/~esr/faqs/smart-questions.html

Consider that the OP might want to pass the C parser output to a Python 
web-content generator, which would make a deal of sense.

regards
  Steve



From martinnitram at excite.com  Mon Feb  7 20:48:39 2005
From: martinnitram at excite.com (martinnitram at excite.com)
Date: 7 Feb 2005 17:48:39 -0800
Subject: check socket alive
Message-ID: <1107827319.700424.180790@f14g2000cwb.googlegroups.com>

Dear all,
   following are some piece of my code (mainly create a socket
connection to server and loop to receive data):

   # function to create and return socket
   def connect():
    server_config = ('192.168.1.50', 3333);
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    try:
        sock.connect()
    except socket.error:
        print "Failed to connect"
        return 0
    return sock

   # function to receive data
   def recv_for_sock(sock):
     sock.settimeout(25)
     while 1:
       if sock is None:
         return 1
       try:
         recv_data = sock.recv(65535)
         if recv_data:
           .... # do something
       except socket.timeout:
         print "Socket Timeout"
         time.sleep (10)
         pass
       except socket.error:
         print "Socket Error"
         time.sleep (10)
         pass

  # main function
  if __name__ == '__main__':
      sock = connect()
      if sock:
          errorno = recv_for_sock(sock)
          ... # other stuffs
      else:
          print "Cannot create connection"
          ...

  my question is, when the socket (create a main function) is
disconnected by server (netstat status show close_wait), in
"recv_for_sock" function, it can catch the timeout exception at first
time. After then, the program will looping/hang within the
"recv_for_sock" function (actually is the socket.recv function) and
causing CPU usage to 99%. So, how to detect the socket connection is
closed at this case? I tried to use exception/check socket is None but
no help.
    Thank for helping.



From irmen.NOSPAM at xs4all.nl  Thu Feb 10 09:01:25 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Thu, 10 Feb 2005 15:01:25 +0100
Subject: is there a safe marshaler?
Message-ID: <420b6936$0$28982$e4fe514c@news.xs4all.nl>

Pickle and marshal are not safe. They can do harmful
things if fed maliciously constructed data.
That is a pity, because marshal is fast.
I need a fast and safe (secure) marshaler.
Is xdrlib the only option?
I would expect that it is fast and safe because
it (the xdr spec) has been around for so long.

Or are there better options (perhaps 3rd party libraries)?

Thanks

Irmen.


From claird at lairds.us  Mon Feb 14 23:08:04 2005
From: claird at lairds.us (Cameron Laird)
Date: Tue, 15 Feb 2005 04:08:04 GMT
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <curb3t$67k$3@usenet.otenet.gr>
	<mailman.2599.1108429568.22381.python-list@python.org>
Message-ID: <a568e2-6a9.ln1@lairds.us>

In article <mailman.2599.1108429568.22381.python-list at python.org>,
Tim Peters  <tim.peters at gmail.com> wrote:
>[Ilias Lazaridis]
>...
			.
			.
			.
>That leaves volunteers, or a company that wants what you want enough
>to pay for it on their own (which has happened, but not often -- I
>don't think it's happened since Zope Corp funded development of the
>datetime module).
			.
			.
			.
'Depending how you categorize things, there have been a few others 
since then--IBM, for example, has paid non-IBM people for Python
stuff IBM open-sourced.

Well, maybe more than a few, now that I think about it.


From bkc at Murkworks.com  Mon Feb 14 18:24:36 2005
From: bkc at Murkworks.com (Brad Clements)
Date: Mon, 14 Feb 2005 18:24:36 -0500
Subject: Python UPS / FedEx Shipping Module
References: <mailman.2411.1108149803.22381.python-list@python.org>	<udePd.660$nC5.453@twister.nyroc.rr.com><b54d0489050212123430ed621d@mail.gmail.com>
	<4210BAF7.9030106@mediapulse.com>
Message-ID: <curbri$h23$1@sea.gmane.org>

_
"Gabriel Cooper" <gabriel.cooper at mediapulse.com> wrote in message
news:4210BAF7.9030106 at mediapulse.com...
>
> >Are the modules just accessing the published apis for their webservices?

> Yes, they use the free API's that have always been freely available.
> They're just *Impossible* to find on either of UPS's OR FedEx's
> websites. It took me no less than an hour and likely more just to find
> the documentation pages on each site. As for putting them up on the web,
> I should be able to get them up by the end of the week.
>

If you downloaded  the documentation from UPS, please re-check your license
agreement for the documentation before posting the code. You might be in
violation of some terms and conditions. I say might, I do not know for
certain and am not hinting that you are violating anything.


I've been tracking through UPS for 4 years using their old crappy interface,
and a newer one, and now we've moved to the XML version. All of their
documents come with a click - through license agreement that probably
restricts you in some way. I haven't read them too closely, since I'm under
contract I say "yes" on behalf of my client. ;-)



-- 
Novell DeveloperNet Sysop #5





From cpl.19.ghum at spamgourmet.com  Wed Feb  9 16:13:07 2005
From: cpl.19.ghum at spamgourmet.com (Harald Massa)
Date: Wed, 9 Feb 2005 21:13:07 +0000 (UTC)
Subject: overwriting method in baseclass
References: <pan.2005.02.08.20.24.43.76297@gmx.net>
Message-ID: <Xns95F8E20DC4F95cpl19ghumspamgourmet@195.20.224.116>

marc,

>> So HOW can SVN be of any use for THIS prob?
> 
> Take a look at the Subversion documentation (the "book") and search
> for `Vendor branches`.
> 
[...]
> The section deals specifically with the situation how to manage 3rd
> party source code with subversion which you want to update from time
> to time and even apply some modifications.

thank you very much for pointing this out! I did not even dare to hope to 
find sth. of this kind with a rcs for MY software.

So I did not even start searching.

Thank you,

Harald


From serpent17 at gmail.com  Sat Feb 19 16:57:33 2005
From: serpent17 at gmail.com (serpent17 at gmail.com)
Date: 19 Feb 2005 13:57:33 -0800
Subject: controlling a qbasic program on a windows98 or example of rs-232
	commanded through python
Message-ID: <1108850253.479488.78650@l41g2000cwc.googlegroups.com>

Hello,

Can python be installed on a win98 system ? if so, how do I control a
qbasic program from python ?

the qbasic program controls input to an RS-232 so I am enclined to
follow the win98 system + qbasic route in order to be quick, or I guess
the question could be, can I control a device through rs-232 from a
newer version of windows using python (actually for the last part of
the question I know this is feasible, but I 'd like to see an example,
any pointers ?)

Thanks for any insight,

Jake.



From aleaxit at yahoo.com  Thu Feb 10 03:59:41 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Thu, 10 Feb 2005 09:59:41 +0100
Subject: Vectors in Visual Python
References: <1107944975.498403.225950@f14g2000cwb.googlegroups.com>
	<pbvj01tiob4v5i6usnkr08j10s9koeh5kn@4ax.com>
	<1grqqa2.1cnkkbv1l5mrrxN%aleaxit@yahoo.com>
	<isdl015rjvuf7o8gs6ig895m0npefj4aos@4ax.com>
Message-ID: <1grrgt7.rje1681dh98itN%aleaxit@yahoo.com>

Arthur <ajsiegel at optonline.com> wrote:

> thinking that the visciousness with wihich you were attacking someone
> suggesting a proposal for an optional feature - even if an iill
> adivised proposal for and ill advised optional feature (I frankly
> don't care much about that part of the discussion one way or another)

While in my case it's essentially ALL that I care about in this
discussion: the technical aspects of Python.

> - was unwarranted, and more importantly *unwise* for someone in a

If, like you, I didn't care about the technical aspects of Python, it
sure would be unwise to get upset -- I could let the language go to hell
in a handbasket, as long as I made sure I looked good myself.

Caring deeply and passionately about something greater than oneself,
particularly something which may seem dry and abstract to those who
don't care a whit for it, might no doubt be deemed intrinsically unwise
-- and yet, there is much to be said for such passion.  Without the
ability to get passionate and inflamed, we might perhaps be wiser, but
we'd be Vulcans, not humans.  Moreover, unless some of us felt such
passion for certain technical issues, you guys who don't care would not
get the benefits of the time and energy we freely devote to them -- so
it's unwise, even from a strictly selfish viewpoint, to try to turn us
firebrands into such coolly calculating Vulcans.

> postion of community leadership - considering past, recent, and
> undoubtedly future issues that have and will arise. 
> 
> What don't *you* understand about that??

Could you _really_ believe, considering the many years of consistent
history of my posts on this group, that by reviving the issue you could
get *any* other effect but fanning the flames all over again?  THAT is
what I don't understand: whether you're doing that _deliberately_, or
out of almost-unbelievable levels of cluelessness.

> We all have are own kinds of stupidities, it seems to me.

This is no doubt the case.  For example, many of us instinctively brake
and swerve when a small animal jumps into the road in front of the car
they're driving, seriously endangering themselves and the passengers
thereby.  If we were presented the issue in a context giving us time to
reflect and react rationally -- "To how much danger to life and limb
would you subject yourself, your wife, and your children, to increase
the likelihood of survival for some stupid cat who can't wait to cross
the road?" -- we'd probably react quite differently.  And yet, while it
IS objectively stupid to behave that way, it _is_ one of the stupidities
that make us human.

A _deliberate_ and consistent preference can be disagreed with, but it's
pretty pointless to call it "stupid" or "unwise"; there is just no
accounting for tastes.  If you _prefer_ the flame about declarations to
continue for its own sake (or because you believe it makes you look
good, whatever), while not caring about its contents, I may consider
that evil and hateful, but it's neither intelligent nor stupid _per se_.
If your preferences are otherwise, and yet your behavior is easily seen
to be such as to have that effect, then THIS is indeed very stupid.


Alex


From fperez.net at gmail.com  Fri Feb  4 02:18:21 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Fri, 04 Feb 2005 00:18:21 -0700
Subject: exporting mesh from image data
References: <m3wttpwo49.fsf@peds-pc311.bsd.uchicago.edu>
Message-ID: <ctv7ir$adq$1@sea.gmane.org>

John Hunter wrote:

> 
> I am trying to generate a mesh for a finite volume solver (gambit,
> fluent) from 3D image data (CT, MRI).  To generate the fluent msh
> file, you need not only a list of vertices and polygons, much like
> what is available in the vtk file format, but also the volume elements
> in the mesh that the polygons abut.  Eg for a given triangle in the
> mesh, you would have a line like

[...]

I hope you posted this on the VTK list with a CC to Prabhu as well...  The hopes
of a positive reply there are, I suspect, a fair bit higher.  The scipy list
would be a good idea, too.

I don't have an answer, but I recall seeing something about a finite volume
solver implemented in python recently.  Interestingly, a quick googling on
those terms turned this up:

http://math.nist.gov/mcsd/Seminars/2005/2005-03-01-wheeler.html

Note the March 1 Boulder meeting :)  (the coordinated times suggest a
videoconference of sorts).

I'll most likely attend the talk, let me know if you still don't have a solution
by then and I can try to talk to Wheeler (if he's physically here instead of in
Gaithesburg).  For all we know, their code might provide an implementation,
have a look (I'd be quite interested in your opinion if you've already looked
at it).

Cheers,

f



From jelleferinga at gmail.com  Tue Feb  1 13:07:07 2005
From: jelleferinga at gmail.com (jelle)
Date: 1 Feb 2005 10:07:07 -0800
Subject: pythonic equivalent of Mathematica's FixedPoint function
In-Reply-To: <mailman.1700.1107276742.22381.python-list@python.org>
References: <1107273234.276714.272890@z14g2000cwz.googlegroups.com>
	<mailman.1700.1107276742.22381.python-list@python.org>
Message-ID: <1107281227.147853.144520@c13g2000cwb.googlegroups.com>

Ah, i see, that clears up the monetary context.
Thank you for your FixedPoint example.
Can i help myself out by mentioning that the most simple things are
always most difficult ;-) 

Thanks, Jelle.



From bvande at po-box.mcgill.ca  Thu Feb 24 12:07:47 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Thu, 24 Feb 2005 12:07:47 -0500
Subject: Selective HTML doc generation
In-Reply-To: <1109238843.901331.224580@g14g2000cwa.googlegroups.com>
References: <1109169752.819253.202930@o13g2000cwo.googlegroups.com>
	<mailman.2976.1109182341.22381.python-list@python.org>
	<1109238843.901331.224580@g14g2000cwa.googlegroups.com>
Message-ID: <421E09E3.8010701@po-box.mcgill.ca>

Graham Ashton said unto the world upon 2005-02-24 04:54:
> Thanks Brian, much appreciated. Looks quite straightforward.
> 
> Graham
> 

Hi Graham,

glad it helped -- I think this marks the first time I've given a 
useful answer to a non-trivial question on comp.lang.python. :-)

<context for future thread readers>

G:
> Hi. I'm looking for a documentation generation tool (such as pydoc,
> epydoc, happydoc, etc.) that will allow me to filter what it includes
> in it's output.
> 
> I only want the reader to know about classes and methods in my package
> if if the classes have docstrings.

B:
Pointed Graham to to the visiblename function of pydoc.py, where I 
recently made a small change to get it to display `private' methods, 
and hypothesized that would be where he'd want to start in order to 
modify pydoc to meet his needs.
</context for future thread readers>

Before I responded, I tried for a bit to write the code to filter for 
only those objects with docstrings like you wanted. I'm fairly new to 
programming and wasn't able to work out exactly what code is needed. 
(My skill level is such that it isn't quite so straight-forward to me :-)

Would you be willing to post what you did to make it work? I think I'd 
learn something, having bounced off when making a (gentle) push on the 
problem.

Best,

Brian vdB



From tmj at SPAMLESSjarmania.com  Sun Feb 27 13:55:13 2005
From: tmj at SPAMLESSjarmania.com (Tim Jarman)
Date: Sun, 27 Feb 2005 18:55:13 +0000
Subject: Need help running external program
References: <c2nUd.3268977$B07.514197@news.easynews.com>
	<cvsvbb$nne$01$1@news.t-online.com>
	<vMnUd.3552914$f47.637318@news.easynews.com>
Message-ID: <38ejcfF5lu11pU1@individual.net>

Rigga wrote:

> Pink wrote:
> 
>> Rigga wrote:
>> 
>>> Hi,
>>> 
>>> I am running the line of code below from a shell script and it works
>>> fine, however I am at a total loss on how i can run it from within a
>>> Python script as every option I have tried fails and it appears to be
>>> down to the escaping of certain characters.
>>> 
>>> wget -q www.anywebpage.com -O - | tr '\r' '\n' | tr \' \" | sed -n
>>> 's/.*url="\([^"]*\)".*/\1/p'
>> If your problem is getting a python string without worrying about how to
>> escape the escape sequences, try:
>> 
>> r"""wget -q www.anywebpage.com -O - | tr '\r' '\n' | tr \' \" | sed -n
>> 's/.*url="\([^"]*\)".*/\1/p'"""
>> 
>> You should be able to pass this directly to a popen() function.
> 
> Hi,
> 
> Thanks for replying however I have just tried that and it does not seem to
> work, it doesnt return any results (i take it the r was a typo)
> 
> Thanks
> 
> RiGGa

No, the r was the point - it's there to tell Python not to do any escaping
on the string. Try it again with the r and see what happens.

-- 
Website: www DOT jarmania FULLSTOP com


From usenet_spam at janc.invalid  Fri Feb  4 06:33:27 2005
From: usenet_spam at janc.invalid (JanC)
Date: Fri, 04 Feb 2005 11:33:27 GMT
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
	<7xy8e5jagh.fsf@ruckus.brouhaha.com>
	<1107490052.542546.285950@c13g2000cwb.googlegroups.com>
	<7xekfwc19i.fsf@ruckus.brouhaha.com>
Message-ID: <Xns95F37FBE6576FJanC@213.118.75.144>

Paul Rubin schreef:

> I don't know that the browser necessarily renders that faster than it
> renders a table,

Simple tables aren't slow, but tables-in-tables-in-tables-in-tables-in-
tables are.

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From steven.bethard at gmail.com  Fri Feb 11 18:26:02 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 11 Feb 2005 16:26:02 -0700
Subject: pre-check for string-to-number conversion
In-Reply-To: <1108163692.700703.183870@o13g2000cwo.googlegroups.com>
References: <1108163692.700703.183870@o13g2000cwo.googlegroups.com>
Message-ID: <l72dnUDS-dGbopDfRVn-hQ@comcast.com>

18k11tm001 at sneakemail.com wrote:
> I am reading an ASCII data file and converting some of the strings to
> integers or floats. However, some of the data is corrupted and the
> conversion doesn't work. I know that I can us exceptions, but they
> don't seem like the cleanest and simplest solution to me.

You should reconsider this thought.  It's quite clean and fast:

for s in get_ASCII_strings_from_data_file():
     try:
         f = float(s)
     except ValueError:
         do_whatever_you_need_to_do_for_invalid_data()


> I would like to simply perform a pre-check before I do the
> conversion, but I can't figure out how to do it.

Again, this is the less Pythonic approach, but one option would be to 
use regular expressions:

matcher = re.compile(r'[\d.]+')
for s in get_ASCII_strings_from_data_file():
     if matcher.match(s):
         f = float(s)
     else:
         do_whatever_you_need_to_do_for_invalid_data()

but note that this won't except valid floats like '1e10'.  You'll also 
note that this is actually less concise than the exception based approach.

Steve



From noah at noah.org  Fri Feb 18 20:58:31 2005
From: noah at noah.org (noah at noah.org)
Date: 18 Feb 2005 17:58:31 -0800
Subject: Can I get message filename from a Maildir mailbox stream?
Message-ID: <1108778311.300124.56920@f14g2000cwb.googlegroups.com>

Is there a way to figure out what
filename an email object points to in a
qmail style Maildir directory?

Hmmm... I don't think so, but I'm hoping I wrong.

I instantiated a Maildir mailbox and I'm
iterating through the messages. When I find a
special message I want to move it or delete it
or something. 

Yours,
Noah



From roy at panix.com  Sun Feb  6 09:56:59 2005
From: roy at panix.com (Roy Smith)
Date: Sun, 06 Feb 2005 09:56:59 -0500
Subject: Python versus Perl ?
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
Message-ID: <roy-91BBB7.09565906022005@reader2.panix.com>

surfunbear at yahoo.com wrote:

>  I've read some posts on Perl versus Python and studied a bit of my
> Python book.
> 
>  I'm a software engineer, familiar with C++ objected oriented
> development, but have been using Perl because it is great for pattern
> matching, text processing, and automated testing. Our company is really
> fixated on risk managnemt and the only way I can do enough testing
> without working overtime (which some people have ended up doing) is by
> automating my testing. That's what got me started on Perl.

Automated testing is essential in almost any software project, and not just 
to make sure you don't have to work overtime.
 
>  I've read that many people prefer Python and that it is better than
> Perl. However, I want to ask a few other questions.

Keep in mind that this is a somewhat biased audience to ask a question like 
that.  For the most part, c.l.p. is inhabited by rabid Pythonistas :-)
 
> 1. Perl seems to have alot of packaged utilities available through
> CPAN, the comprehensive perl network.

There is no doubt that there's a lot of stuff on CPAN, and the architecture 
of the repository makes it relatively easy to find what you want and get it 
running.  On the other hand, there are a lot of add-on modules for Python 
too.  You mention DBI; Python's version of that is the DB-API, and there 
are quite a few modules that implement it 
(http://www.python.org/topics/database/modules.html).

> Perl also has excellent pattern matching compared to
> sed, not sure about how Python measures up,
> but this seems to make perl ideally suited to text processing.

As far as regular espressions themselves, Python supports exactly the same 
regex syntax that Perl does.  The packaging is a little different; instead 
of being built-in to the language, it's a module you import and use in an 
object-oriented way.

> 2. Python is apparantly better at object oriented. Perl has some kind
> of name spacing, I have used that in a limited way. Does Perl use a
> cheap and less than optimal Object oriented approach?

Python's OO support was designed-in from the ground up.  Perl's is an ugly 
wart held on with duct tape.

> That was what someone at work said, he advocates Python.
> Is it likely that Perl will improve it's object oriented features
> in the next few years ?

There is a "Perl 6" project going on, which I imagine will have some major 
changes to the language, but you'll have to ask the Perl people about that.

> 3. Perl is installed on our system and alot of other systems.
> You don't have to make sys admins go out of there way to make it
> available. It's usualy allready there.

Python now comes standard with a lot of operating systems, but it is 
certainly true that if there is one lingua franca in the computer world 
(and certainly the Unix world), Perl is it.  If your prime motivation is 
portability, that might be the feature which tips the balance in favor of 
Perl.

> I also did a search of job
> postings on a popular website. 108 jobs where listed that require
> knowledge of Perl, only 17 listed required Python. Becomeing more
> familiar with Perl might then be usefull for ones resume?

There is no doubt that most employers expect you to know Perl.  Even if 
it's not on the job spec, there's enough Perl out there in the world that 
it really is worth knowing.  If your career goal is sysadmin rather than 
programming, then I'd say Perl is absolutely essential to know.
 
> If Python is better than Perl, I'm curious how really significant
> those advantages are?

Well, now we're back to that biased audience stuff again.  My answer is 
that of course it's better.  The biggest advantage of Python is that it has 
a clean syntax with designed-in support of OOP.

Perl's basic syntax is a jumble of stuff stolen from shell, awk, sed, and 
grep, with some vague OO ideas glommed onto it.  The heavy reliance on 
punctuation makes it almost impossible to read.

My suggestion is to learn Python, then make up your own mind.  Grab one of 
the tutorials available on-line and spend an afternoon getting the basics 
down.  Next step, pick a small real-life project and invest a couple of 
days doing it in Python.  By then, you should have a better idea of whether 
it's worth investing some more time to get deeper into it.

One you know C++, Perl, and Python, you'll have exposure to a pretty broad 
range of programming paradigms.  But, don't stop there.  If your goal is to 
be a professional programmer, keep learning languages.  Learn some because 
they'll provide a paycheck, learn others because they'll expose you to 
different ideas.  In today's world, I'd put Java, SQL, VB, and C# in the 
"paycheck" group.  I'd put Lisp, Smalltalk, and Postscript in the "personal 
improvement" group.  Things like Python, Tcl, and Ruby fall somewhere 
in-between; they're interesting because they explore different corners of 
the "how to design a programming language" universe, but they also have a 
reasonable chance of being a skill which will keep the paychecks flowing.


From skip at mojam.com  Wed Feb  2 13:45:35 2005
From: skip at mojam.com (Skip Montanaro)
Date: Wed, 2 Feb 2005 12:45:35 -0600
Subject: Python Code Auditing Tool
In-Reply-To: <ctqube$hue$1@panix2.panix.com>
References: <pan.2005.02.02.05.47.52.827795@flaminglunchbox.net>
	<7xhdkvbjab.fsf@ruckus.brouhaha.com>
	<mailman.1759.1107360282.22381.python-list@python.org>
	<ctqube$hue$1@panix2.panix.com>
Message-ID: <16897.8143.800947.266849@montanaro.dyndns.org>


    >> 246 ValueError
    >> 227 aetools.Error
    >> 216 Error
    >> 124 TypeError
    >> 101 error
    >> 75 RuntimeError
    >> 53 IOError
    >> 36 NotImplementedError
    >> 36 ImportError
    >> 36 EOFError
    >> 31 SyntaxError
    >> 23 KeyError
    >> 23 AttributeError
    >> 22 DistutilsPlatformError
    >> 21 UnicodeError

    Roy> It's kind of interesting (scarry?) that in roughly 20% of the cases
    Roy> nothing more specific than Error is raised.

Not really.  You might have code in a module named mod like this:

    class Error(Exception): pass

then later:

    def foo(...):
        ... blah blah blah ...
        if condition:
            raise Error, "hey dummy!"

The caller might look like:

    import mod

    ...

    try:
        mod.foo()
    except mod.Error, msg:
        print msg

That said, the tendency for many newer modules seems to be to discriminate
exceptions based on type (look at urllib2 for example) while older modules
tended to have just a single exception they raised (look at ftplib).  I
suspect that has something to do with whether the module was originally
written before or after Python introduced class exceptions.

Skip


From peter at somewhere.com  Mon Feb 14 04:11:14 2005
From: peter at somewhere.com (Peter Maas)
Date: Mon, 14 Feb 2005 10:11:14 +0100
Subject: For American numbers
In-Reply-To: <mailman.2509.1108352149.22381.python-list@python.org>
References: <420e7376$1@nntp0.pdx.net>	<gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>	<420fb4e6$0$16575$9b622d9e@news.freenet.de>	<ZcKdnWy9_fFamI3fRVn-iA@powergate.ca>
	<mailman.2509.1108352149.22381.python-list@python.org>
Message-ID: <37b8dfF5anl9bU1@individual.net>

Dave Brueck schrieb:
> Multiple definitions aside, "kilo" and "mega" are far too entrenched - 
> even if I could manage to say "kibibyte" with a straight face, I'd get 
> nothing but blank stares in return.

This kibi-mebi thing will probably fail because very few can manage
to say "kibibyte" with a straight face :)

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From rparnes at megalink.net  Wed Feb  9 17:58:11 2005
From: rparnes at megalink.net (Bob Parnes)
Date: Wed, 09 Feb 2005 22:58:11 -0000
Subject: User Identification
References: <slrnd0hc3d.1pq.rparnes@debian.localdomain>
Message-ID: <slrnd0l59j.9mt.rparnes@debian.localdomain>

On Tue, 08 Feb 2005 12:29:48 -0000, Bob Parnes <rparnes at megalink.net> wrote:
> I have a python program on a server of an all-linux network. It needs to 
> record the user name running it. Is there a way for the program to extract
> the name from the system without a separate log-in dialog?
> 
> Bob Parnes

Thanks very much. Had not realized there were so many possibilities.

Bob Parnes

-- 
Bob Parnes
rparnes at megalink.net


From tjreedy at udel.edu  Mon Feb 14 23:19:28 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 14 Feb 2005 23:19:28 -0500
Subject: Iterator / Iteratable confusion
References: <420a5c1e$0$21630$a1866201@visi.com><slrnd0q67t.52v.curty@einstein.electron.net><200502131848.03655.francis.girard@free.fr>	<200502131958.27410.francis.girard@free.fr><cuolu7$qv7$1@sea.gmane.org>
	<cuooip$1pd$1@sea.gmane.org>
Message-ID: <curt3v$lmf$1@sea.gmane.org>


"Michael Spencer" <mahs at telcopartners.com> wrote in message 
news:cuooip$1pd$1 at sea.gmane.org...
> Terry Reedy wrote:
>> iter(iterator) is iterator is part of the iterater protocol

> But, notwithstanding the docs, it is not essential that
> iter(iterator) is iterator

If a program depends on that invariant, then it is essential for that 
program.  Leaving such programs aside, I interpret this and your example 
together as saying three things:

1. "There is more than one possible definition of 'iterator'."

Yes.  Python could have defined many things differently.  But I think it 
important to have a clear definition of iterator (and other things) so one 
can reason about program behavior.

2. "It is not essential to not do something wasteful as long as it is 
otherwise inconsequential."

Usually true, but I don't see this as clarifying the relationship between 
iterables and iterators in Python.  (I am assuming that your example is 
only meant to illustrate possibilities rather than usefulness.)

3. "You can substitute a copy of an object that is never mutated for the 
object itself."

True, as long as you do not look at the id.  But in practice, change of 
state is essential to the function of nearly all iterators.  For mutated 
objects, one has to add the proviso that the copy is current and the 
substitution total, so that there are no references left to the original. 
But again, this has nothing in particular to do with iteration.

>  >>> class A(object):
>  ...     def __iter__(self):
>  ...         return AnIterator()
>  ...
>  >>> class AnIterator(object): # an iterator that copies itself

By the narrower definition of iterator that I used, this is not an 
iterator.  Also, the replacement is only a copy if the instance has not 
been mutated.  Is your broader definition limited to return of initialized 
copies or would it allow other things also?

>  ...     def next(self):
>  ...         return "Something"
>  ...     def __iter__(self):
>  ...         return AnIterator()

The second def statement is equivalent (except for identity) to
    __iter__ = A.__iter__

To illustrate the point about mutation with a simple toy example:

a = A()
a.doc = 'My iterator'
b = iter(a)

b is not a copy of a as it is, but only as it was initially.

Terry J. Reedy





From kent3737 at yahoo.com  Sat Feb  5 21:12:29 2005
From: kent3737 at yahoo.com (Kent Johnson)
Date: Sat, 05 Feb 2005 21:12:29 -0500
Subject: changing local namespace of a function
In-Reply-To: <cu3d3j$h09$1@joe.rice.edu>
References: <cu0lru$8ik$1@joe.rice.edu>
	<cu0sj5$sfk$1@sea.gmane.org>	<4204400C.5060608@iinet.net.au>
	<mailman.1948.1107575575.22381.python-list@python.org>
	<cu1l9o$3oq$1@joe.rice.edu> <cu3d3j$h09$1@joe.rice.edu>
Message-ID: <42057a48$1_2@newspeer2.tds.net>

Bo Peng wrote:
>> Exec is slow since compiling the string and calls to globals() use a 
>> lot of time.  The last one is most elegant but __getattr__ and 
>> __setattr__ are costly. The 'evil hack' solution is good since 
>> accessing x and y takes no additional time.
> 
> 
> Previous comparison was not completely fair since I could pre-compile 
> fun2 and I used indirect __setattr__. Here is the new one:
>  >>> # solution two: use exec
> ... def makeFunction(funcStr, name):
> ...   code = compile(funcStr, name, 'exec')
> ...   def f(d):
> ...     exec code in d
> ...   return f
> ...
>  >>> def fun2(d):
> ...   myfun = makeFunction('z = x + y', 'myfun')
> ...   for i in xrange(0,N):
> ...     myfun(d)
> ...   del d['__builtins__']

You are still including the compile overhead in fun2. If you want to see how fast the compiled code 
is you should take the definition of myfun out of fun2:

myfun = makeFunction('z = x + y', 'myfun')
def fun2(d):
   for i in xrange(0,N):
     myfun(d)
   del d['__builtins__']

Kent


From jfj at freemail.gr  Mon Feb  7 02:41:05 2005
From: jfj at freemail.gr (jfj)
Date: Sun, 06 Feb 2005 23:41:05 -0800
Subject: Confused with methods
In-Reply-To: <cu60os$1cg$05$1@news.t-online.com>
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<TL-dneoHycPA35vfRVn-qQ@rogers.com>
	<mailman.2027.1107713399.22381.python-list@python.org>
	<cu60os$1cg$05$1@news.t-online.com>
Message-ID: <42071B91.5050901@freemail.gr>

Diez B. Roggisch wrote:

> If things worked as you wanted it to, that would mean that passing a bound
> method as argument to a class and storing it there to an instance variable
> that would "eat up" the arguments - surely not the desired behaviour.

Could you please give an example of this ?

If you mean:

    class A:
       def f(x):
          print x

    class B:
       pass

    a=A()
    B.f = a.f
    b=B()
    b.f()     #surprise: it works!!

then that is equally "weird" as my case.
In fact is seems more appropriate to use a.f.im_func in this
case to "convert the bound method to an unbound one".

Maybe this happens more often though?


Thanks,

G.



From roman.yakovenko at gmail.com  Tue Feb  8 07:43:26 2005
From: roman.yakovenko at gmail.com (Roman Yakovenko)
Date: Tue, 8 Feb 2005 14:43:26 +0200
Subject: Choosing the right parser for parsing C headers
In-Reply-To: <cuabkq$8uh$1@sea.gmane.org>
References: <1107861023.254610.14310@g14g2000cwa.googlegroups.com>
	<mailman.2161.1107861785.22381.python-list@python.org>
	<1107865641.937691.282930@g14g2000cwa.googlegroups.com>
	<cuabkq$8uh$1@sea.gmane.org>
Message-ID: <7465b61705020804432e738790@mail.gmail.com>

try http://sourceforge.net/projects/pygccxml
There are a few examples and nice ( for me ) documentation.

Roman

On Tue, 8 Feb 2005 13:35:57 +0100, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Jean de Largentaye wrote:
> 
> > GCC-XML looks like a very interesting alternative, as Python includes
> > tools to parse XML.
> > The mini-C compiler looks like a step in the right direction for me.
> > I'm going to look into that.
> > I'm not comfortable with C++ yet, and am not sure how I'd use Pyste.
> 
> to clarify, Pyste is a Python tool that uses GCCXML to generate bindings; it might
> not be something that you can use out of the box for your project, but it's definitely
> something you should study, and perhaps borrow implementation ideas from.
> 
> </F>
> 
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From jdhunter at ace.bsd.uchicago.edu  Thu Feb  3 12:27:02 2005
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Thu, 03 Feb 2005 11:27:02 -0600
Subject: exporting mesh from image data
Message-ID: <m3wttpwo49.fsf@peds-pc311.bsd.uchicago.edu>


I am trying to generate a mesh for a finite volume solver (gambit,
fluent) from 3D image data (CT, MRI).  To generate the fluent msh
file, you need not only a list of vertices and polygons, much like
what is available in the vtk file format, but also the volume elements
in the mesh that the polygons abut.  Eg for a given triangle in the
mesh, you would have a line like

  3 3 2 1 11 0

which is 

  numfaces vert0 vert1 vert2 vol1 vol2

where vol1 and vol2 are indices that indicate the volume in the mesh
that the triangle belongs to (vol2 is 0 for triangles on the surface).

The specific problem at hand involves building a mesh for ventricles
in the brain.  I have no trouble building the isosurface that
surrounds the ventricles using the marching cubes and connectivity
filters in VTK, but now need to be able to generate a mesh over the
interior and assign volumes to faces.

Does such capability exist in VTK? and if so I would be thankful for
pointers to class docs or examples.  Are there other algorithms in the
world of python 3D libraries that can provide 3D meshes for 2D surface
isocontours, assigning volume elements from the mesh to the surfaces
that surround the volume.

Thanks!
JDH




From skip at pobox.com  Fri Feb 11 13:00:58 2005
From: skip at pobox.com (Skip Montanaro)
Date: Fri, 11 Feb 2005 12:00:58 -0600
Subject: is there a safe marshaler?
In-Reply-To: <3b091a1c.0502110634.5edb1987@posting.google.com>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<420b6e98$0$23018$626a14ce@news.free.fr>
	<420b9135$0$28982$e4fe514c@news.xs4all.nl>
	<3b091a1c.0502110634.5edb1987@posting.google.com>
Message-ID: <16908.62170.778888.249227@montanaro.dyndns.org>


    Carl> but can't effbot's fast cElementree be used for PYROs XML_PICKLE
    Carl> and would it be safe and fast enough?

It's not clear to me that if marshal is unsafe how XML could be safe.  In
this context they are both just serializations of basic Python data
structures.

Skip



From martin.sand.christensen at gmail.com  Thu Feb 17 11:49:53 2005
From: martin.sand.christensen at gmail.com (Martin Christensen)
Date: Thu, 17 Feb 2005 17:49:53 +0100
Subject: Getting milliseconds in Python
References: <1108565135.167562.196830@z14g2000cwz.googlegroups.com>
	<37h5epF5ck38lU2@individual.net>
	<1108571009.698970.152020@z14g2000cwz.googlegroups.com>
	<cv0100$715$1@eeyore.INS.cwru.edu>
	<mailman.2706.1108577006.22381.python-list@python.org>
	<cv0gru$802$1@eeyore.INS.cwru.edu>
	<slrnd19d00.1ep.curty@einstein.electron.net>
	<cv2dkb$97g$1@eeyore.INS.cwru.edu> <87d5uzyx39.fsf@gmail.com>
	<cv2gl7$ea5$1@eeyore.INS.cwru.edu>
Message-ID: <871xbfyvv2.fsf@gmail.com>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

>>>>> "Brian" == Brian Beck <exogen at gmail.com> writes:
Brian> Man, this is the hottest topic on c.l.py since that Lazaridis
Brian> guy...

... which was really the point of my joke, even if it did belly flop
somewhat. This whole discussions brought to mind a cartoon where a
group of doctors were performing open heart surgery. One of them says,
"Okay, how many of us believe that the heart has _four_ chambers?,"
and a few of the others raise their hands. I intended it as a 'let's
call in the professors to determine if 2+2=4', but, well... :-)

Martin

- -- 
Homepage:       http://www.cs.auc.dk/~factotum/
GPG public key: http://www.cs.auc.dk/~factotum/gpgkey.txt
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.5 (GNU/Linux)
Comment: Using Mailcrypt+GnuPG <http://www.gnupg.org>

iEYEARECAAYFAkIUyzAACgkQYu1fMmOQldWVdACdHLxtUi4TtFCl0ZW6wf65Hu9M
ioMAoMWAHrkS5lhQw5V0cJXVO1nk76MO
=6MXl
-----END PGP SIGNATURE-----


From alexander.dietz at mpi-hd.mpg.de  Wed Feb  2 16:27:49 2005
From: alexander.dietz at mpi-hd.mpg.de (alex)
Date: 2 Feb 2005 13:27:49 -0800
Subject: Basic file operation questions
Message-ID: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>

Hi,

I am a beginner with python and here is my first question:
How can I read the contents of a file using a loop or something? I open
the file with file=open(filename, 'r') and what to do then? Can I use
something like

for xxx in file:
   ....


Thanks for help
Alex



From zerok at zerokspot.com  Tue Feb 22 13:36:38 2005
From: zerok at zerokspot.com (Horst Gutmann)
Date: Tue, 22 Feb 2005 19:36:38 +0100
Subject: Problem with minidom and special chars in HTML
In-Reply-To: <mailman.2939.1109091398.22381.python-list@python.org>
References: <421b5b8c$1@news.uni-klu.ac.at>
	<mailman.2939.1109091398.22381.python-list@python.org>
Message-ID: <421b7b67$1@news.uni-klu.ac.at>

Fredrik Lundh wrote:
> umm.  doesn't that doctype point to an SGML DTD?  even if minidom did fetch
> external DTD's (I don't think it does), it would probably choke on that DTD.
> 
> running your documents through "tidy -asxml -numeric" before parsing them as
> XML might be a good idea...
> 
>     http://tidy.sourceforge.net/ (command-line binaries, library)
>     http://utidylib.berlios.de/ (python bindings)
> 
> </F> 
> 
> 
> 

Thanks, but the problem is, that I can't use the numeric representations 
of these special chars. I will probably simply play find&replace before 
feeding the document into minidom and change the output back afterwards :-)

MfG, Horst


From marian at mba-software.de  Wed Feb  2 05:56:44 2005
From: marian at mba-software.de (=?ISO-8859-1?Q?Marian_Aldenh=F6vel?=)
Date: Wed, 02 Feb 2005 11:56:44 +0100
Subject: Printing Filenames with non-Ascii-Characters
In-Reply-To: <42009f9b$0$238$edfadb0f@dread12.news.tele.dk>
References: <36a3ikF4uk8r0U1@individual.net>
	<ctos5r$t3b$1@news2.tilbu1.nb.home.nl>
	<36bka5F4vp17cU1@individual.net>
	<42009f9b$0$238$edfadb0f@dread12.news.tele.dk>
Message-ID: <36bpvmF4vri6jU1@individual.net>

Hi,

> Have you set the coding cookie in your file?

Yes. I set it to Utf-8 as that's what I use for all my development.

> Try adding this as the first or second line.
> 
> # -*- coding: cp850 -*-
> 
> Python will then know how your file is encoded

That is relevant to the encoding of source-files, right? How does it affect
printing to standard out?

If it would I would expect UTF-8 data on my console. That would be fine, it
can encode everything and as I have written in another posting in my case
garbled data is better than termination of my program.

But it uses 'ascii', at least if I can believe the error message it gave.

Ciao, MM
-- 
Marian Aldenh?vel, Rosenhain 23, 53123 Bonn. +49 228 624013.
http://www.marian-aldenhoevel.de
"There is a procedure to follow in these cases, and if followed it can
  pretty well guarantee a generous measure of success, success here
  defined as survival with major extremities remaining attached."


From roy at panix.com  Tue Feb  1 09:47:04 2005
From: roy at panix.com (Roy Smith)
Date: Tue, 01 Feb 2005 09:47:04 -0500
Subject: PyCon signature advertising
References: <lELLd.101987$Jk5.75234@lakeread01>
	<mailman.1690.1107267215.22381.python-list@python.org>
Message-ID: <roy-256CBC.09470401022005@reader2.panix.com>

In article <mailman.1690.1107267215.22381.python-list at python.org>,
 "Mike C. Fletcher" <mcfletch at rogers.com> wrote:

> Steve Holden wrote:
> ...
> 
> > I appreciate that not everyone has control over their .sig,
> 
> ...
> 
> Take control of your sigs, my sisters and brothers!  Viva la 
> Revolution!  Follow the Steve into the heat and light of PyCon.  You can 
> achieve enlightenment if only you go to the District on the Eastern Edge 
> of the new continents when the spring arrives.  It is only there that 
> all will be revealed.  It is only there that you shall find peace.
> 
> Joy to the Python world!
> Mike

And the smallest child asked:

Why is this language different from all other languages?.

In all other languages, we are driven to declare our variables in a static 
manner, as surely as the compiler compels us to know their types ahead of 
time, and be forced to invoke the power of the reinterpret_cast whenever we 
need to deviate from the straight path laid out for us.  Why do we not in 
this language?

In all other languages, we may indent as we please, depending on the twin 
angels of the curly-brace and the semicolon to discern the true meaning 
from the meanderings of our code across the pages of our printouts.  Why do 
we indent with tabs as rigidly as the rows of corn in our fields in this 
language?

In all other languages, we omit explicit references to self, trusting to 
context to determine the scope of our variables.  Why in this language do 
we speak our own name with overbearing monotony each time we refer to an 
instance variable?

In all other languages, we are forced to choose between object orientation 
and procedural code and bear the burden of our choice all through the long 
days of the project lifecycle.  Why in this language are we free to mix 
paradigms, even to the point of using functional programming constructs 
only whenever they seem cool and useful without fear of retribution from 
the methodology police?

Then the smallest child was silent, and the old man began to speak.


From rbt at athop1.ath.vt.edu  Fri Feb  4 14:43:30 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Fri, 04 Feb 2005 14:43:30 -0500
Subject: string issue
In-Reply-To: <36QMd.103084$Jk5.36127@lakeread01>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
	<36QMd.103084$Jk5.36127@lakeread01>
Message-ID: <cu0j92$kf7$2@solaris.cc.vt.edu>

Steve Holden wrote:
> rbt wrote:
> 
>> Either I'm crazy and I'm missing the obvious here or there is 
>> something wrong with this code. Element 5 of this list says it doesn't 
>> contain the string 255, when that's *ALL* it contains... why would it 
>> think that???
>>
>> import time
>>
>> ips = ['255.255.255.255', '128.173.120.79', '198.82.247.98', 
>> '127.0.0.1', '255.0.0.0', '255', '128.173.255.34']
>>
>> for ip in ips:
>>     if '255' in ip:
>>         try:
>>             print "Removing", ip
>>             ips.remove(ip)
>>         except Exception, e:
>>             print e
>>
>> print ips
>> time.sleep(5)
>>
>> Someone tell me I'm going crazy ;)
> 
> 
> You are modifying the list as you iterate over it. Instead, iterate over 
> a copy by using:
> 
> for ip in ips[:]:
>   ...
> 
> regards
>  Steve

Very neat. That's a trick that everyone should know about. I vote it 
goes in Dr. Dobbs newsletter.


From fperez.net at gmail.com  Fri Feb  4 20:27:04 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Fri, 04 Feb 2005 18:27:04 -0700
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot><1107487113.732375.110850@c13g2000cwb.googlegroups.com><opslnmywarej1m1c@ashot><mailman.1865.1107491434.22381.python-list@python.org><opsln54fpwej1m1c@ashot>
	<36hculF51ho2sU1@individual.net><1107530489.308497.103530@g14g2000cwa.googlegroups.com><36hrjpF4ui8fbU1@individual.net>
	<mailman.1911.1107546744.22381.python-list@python.org>
	<36i84qF52ce29U1@individual.net> <opslo127s7ej1m1c@ashot>
	<cu0umf$cja$1@sea.gmane.org>
	<mailman.1936.1107561113.22381.python-list@python.org>
	<opslo7jfhqej1m1c@ashot>
Message-ID: <cu17bl$tui$2@sea.gmane.org>

Ashot wrote:

> whoa, that was quick, looks like it works for me.  Thanks a lot!
> It would be nice to be able to set the colors in the prefs file, although
> its possible to edit the pyColorize file as Claudio mentioned.

Yes, I haven't implemented user-definable color schemes.  Not impossible, but
not a priority at the moment (much bigger fish to fry).  Sorry 'bout that
(patches welcome, though).

Regards,

f



From reinhold-birkenfeld-nospam at wolke7.net  Mon Feb  7 14:41:36 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Mon, 07 Feb 2005 20:41:36 +0100
Subject: python code with indention
In-Reply-To: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
Message-ID: <36pujcF55i71cU1@individual.net>

Xah Lee wrote:
> is it possible to write python code without any indentation?

Yes.

Reinhold


From db3l at fitlinxx.com  Wed Feb 23 10:52:53 2005
From: db3l at fitlinxx.com (David Bolen)
Date: 23 Feb 2005 10:52:53 -0500
Subject: print and str subclass with tab in value
Message-ID: <u650jmfxm.fsf@fitlinxx.com>

I ran into this strange behavior when noticing some missing spaces in
some debugging output.  It seems that somewhere in the print
processing, there is special handling for string contents that isn't
affected by changing how a string is represented when printed
(overriding __str__).

For example, given a class like:

    class mystr(str):

        def __new__(cls, value):
            return str.__new__(cls, value)

        def __str__(self):
            return 'Test'

you get the following behavior

>>> x = strtest.mystr('foo')
>>> print x,1
Test 1
>>> print repr(x),1
'foo' 1
>>> x = strtest.mystr('foo\t')
>>> print x,1
Test1
>>> print repr(x),1
'foo\t' 1

Note the lack of a space if the string value ends in a tab, even if
that tab has nothing to do with the printed representation of a
string.

It looks like it's part of basic string output since with a plain old
string literal the tab gets output (I've replaced the literal tab with
[TAB] in the output below) but no following string.

>>> x = 'testing\t'
>>> print x,1
testing[TAB]1
>>> x = str('testing\t')
>>> print x,1
testing[TAB]1

so I'm guessing it's part of some optimization of tab handling in
print output, although a quick perusal of the Python source didn't
have anything jump out at me.

It seems to me that this is probably a buglet since I would expect
print and its softspace handling to depend on what was actually
written and not internal values - has anyone else ever run into this.

-- David


From ncoghlan at iinet.net.au  Mon Feb  7 07:34:54 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Mon, 07 Feb 2005 22:34:54 +1000
Subject: empty classes as c structs?
In-Reply-To: <9rmdnVR1lr-LYJvfRVn-gg@comcast.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<7rSdne7BcbDeV57fRVn-jg@comcast.com>	<mailman.1963.1107594941.22381.python-list@python.org>	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>	<mailman.1973.1107618702.22381.python-list@python.org>	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>	<mailman.2006.1107658273.22381.python-list@python.org>	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>	<mailman.2049.1107750700.22381.python-list@python.org>
	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com>
Message-ID: <4207606E.4040806@iinet.net.au>

Steven Bethard wrote:
> It was because these seem like two separate cases that I wanted two 
> different functions for them (__init__ and, say, dictview)...

The other issue is that a namespace *is* a mutable object, so the default 
behaviour should be to make a copy (yeah, I know, I'm contradicting myself - I 
only just thought of this issue). So an alternate constructor is definitely the 
way to go.

I think Michael's implementation also fell into a trap whereby 'E' couldn't be 
used as an attribute name. The version below tries to avoid this (using 
magic-style naming for the other args in the methods which accept keyword 
dictionaries).

To limit the special casing in update, I've switched to only using __dict__ for 
the specific case of instances of namespace (otherwise the semantics are too 
hard to explain). This is to allow easy copying of an existing namespace - for 
anything else, invoking vars() is easy enough.

And I was reading Carlos's page on MetaTemplate, so I threw in an extra class 
"record" which inherits from namespace and allows complex data structures to be 
defined via class syntax (see the record.__init__ docstring for details). That 
bit's entirely optional, but I thought it was neat.

Finally, I've just used normal names for the functions. I think the issue of 
function shadowing is best handled by recommending that all of the functions be 
called using the class explicitly - this works just as well for instance methods 
as it does for class or static methods.

Cheers,
Nick.

+++++++++++++++++++++++++++++++++++++++++++++

from types import ClassType

class namespace(object):
     """
     namespace([namespace|dict]) => object

     namespace objects provide attribute access to their __dict__
     Complement of vars:  vars(object) => object.__dict__

     Non-magic methods should generally be invoked via the class to
     avoid inadvertent shadowing by instance attributes

     Using attribute names that look like magic attributes is not
     prohibited but can lead to surprising behaviour.

     In general, operations on namespace equate to the operations
     on namespace.__dict__
     """

     def __init__(__self__, __orig__ = None, **__kwds__):
         """__init__([namespace|dict], **kwds) -> None"""
         type(__self__).update(__self__, __orig__, **__kwds__)

     @classmethod
     def view(cls, orig):
         """namespace.view(dict) -> namespace

         Creates a namespace that is a view of the original
         dictionary. Allows modification of an existing
         dictionary via namespace syntax"""
         new = cls()
         new.__dict__ = orig
         return new

     def __repr__(self):
         return "%s(%s)" % (self.__class__.__name__, repr(self.__dict__))

     # Recommend calling non-magic methods via class form to
     # avoid problems with inadvertent attribute shadowing
     def _checked_update(self, other):
         try:
             self.__dict__.update(other)
         except (TypeError):
             raise TypeError("Namespace update requires mapping "
                             "keyed with valid Python identifiers")

     def update(__self__, __other__ = None, **__kwds__):
         """type(self).update(self, [namespace|dict], **kwds) -> None
         equivalent to self.__dict__.update"""
         # Handle direct updates
         if __other__ is not None:
              if isinstance(__other__, namespace):
                  type(__self__)._checked_update(__self__, __other__.__dict__)
              else:
                  type(__self__)._checked_update(__self__, __other__)
         # Handle keyword updates
         if __kwds__ is not None:
             type(__self__)._checked_update(__self__, __kwds__)


class record(namespace):
     def __init__(self, definition=None):
         """record([definition]) -> record

         Constructs a namespace based on the given class definition
         Nested classes are created as sub-records
         Fields starting with an underscore are ignored
         If definition is not given, uses current class
         This is handy with subclasses
         Using subclasses this way has the advantage that the
         created records are also instances of the subclass.

         For example:
         Py> from ns import namespace, record
         Py> class Record:
         ...   a = 1
         ...   b = ""
         ...   class SubRecord:
         ...     c = 3
         ...
         Py> x = record(Record)
         Py> x
         record({'a': 1, 'b': '', 'SubRecord': record({'c': 3})})
         Py> class Record2(record):
         ...   a = 1
         ...   b = ""
         ...   class SubRecord2(record):
         ...     c =3
         ...
         Py> x = Record2()
         Py> x
         Record2({'a': 1, 'b': '', 'SubRecord2': SubRecord2({'c': 3})})
         """
         cls = type(self)
         if definition is None:
             definition = cls
         cls.update_from_definition(self, definition)

     def update_from_definition(self, definition):
         """type(self).update_from_definition(self, definition) -> None

         Updates the namespace based on the given class definition
         Nested classes are created as sub-records
         Fields starting with an underscore are ignored"""
         try:
             for field, default in definition.__dict__.iteritems():
                 if field.startswith("_"):
                     continue
                 if (isinstance(default, (type, ClassType))
                     and issubclass(default, record)):
                     # It's a record, so make it an instance of itself
                     self.__dict__[field] = default()
                 else:
                     try:
                         # If we can make a record of it, do so
                         self.__dict__[field] = record(default)
                     except TypeError:
                         # Throw it in a standard field
                         self.__dict__[field] = default
         except AttributeError:
             raise TypeError("Namespace definition must have __dict__ attribute")

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From simoninusa2001 at yahoo.co.uk  Thu Feb 17 12:18:10 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 17 Feb 2005 09:18:10 -0800
Subject: Pausing a program - poll/sleep/threads?
In-Reply-To: <1108659761.226825.178390@f14g2000cwb.googlegroups.com>
References: <1108625477.222091.34680@l41g2000cwc.googlegroups.com>
	<7xekffr5ts.fsf@ruckus.brouhaha.com>
	<1108642815.203982.140210@g14g2000cwa.googlegroups.com>
	<1108659761.226825.178390@f14g2000cwb.googlegroups.com>
Message-ID: <1108660690.941659.209430@g14g2000cwa.googlegroups.com>

Damn! signal is not supported on Windows.

time.sleep() doesn't work, as I suspected::

def info(self):
   sleep(5)
   self.info()

Basically causes the function to pause, then call itself again, all in
the foreground :-(

I'm thinking some sort of thread timer is the way to go, but really
don't understand threads....



From sdementen at hotmail.com  Tue Feb  1 06:47:34 2005
From: sdementen at hotmail.com (Sebastien de Menten)
Date: 1 Feb 2005 03:47:34 -0800
Subject: python ScriptControl error in Excel while running fine in python
Message-ID: <8dad5312.0502010347.48fdd947@posting.google.com>

I am trying to use ScriptControl under Excel (Windows XP) with the
code:

Global sc As New MSScriptControl.ScriptControl

Public Function os_getcwd()
    sc.Language = "python"
    sc.ExecuteStatement ("import os")
    os_getcwd = sc.Eval("os.getcwd()")
End Function

When setting the language to python I have the error "A script engine
for the specified language..."

On the other side, under python, the translated code:

import win32com.client

sc=win32com.client.Dispatch("ScriptControl")
sc.Language = "python"
sc.ExecuteStatement ("import os")
print sc.Eval("os.getcwd()")

works without any problem !

So, is it possible that a different set of permissions for languages
available in ScriptControl is used when executed from Excel or from
python ?
Is it possible to ask the available languages to ScriptControl ?

Well, in fact I am totally puzzled by this behaviour so any help is
welcome :-)

Sebastien

PS: could you reply to my email address as I do not read regularly
c.l.p. ? thanks


From mark at freelance-developer.com  Wed Feb  2 17:06:22 2005
From: mark at freelance-developer.com (Mark Nenadov)
Date: Wed, 02 Feb 2005 17:06:22 -0500
Subject: Getting a module's byte code, how?
References: <42014e25$0$28975$e4fe514c@news.xs4all.nl>
Message-ID: <pan.2005.02.02.22.06.22.395829@freelance-developer.com>

On Wed, 02 Feb 2005 23:03:17 +0100, Irmen de Jong wrote:

> What would be the best way, if any, to obtain
> the bytecode for a given loaded module?
> 
> I can get the source:
> import inspect
> import os
> src = inspect.getsource(os)
> 
> but there is no ispect.getbytecode()  ;-)
> 
> --Irmen

The inspect API documentation says that code objects have "co_code", which
is a string of raw compiled bytecode.

Hope that helps!

- -
Mark Nenadov
Python Byte Solutions
http://www.pythonbyte.com/


From rschroev_nospam_ml at fastmail.fm  Sun Feb 27 04:39:49 2005
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sun, 27 Feb 2005 09:39:49 GMT
Subject: lambda strangeness??
In-Reply-To: <v73321hkh2v7bhrnj7enet296entdj5drb@4ax.com>
References: <v73321hkh2v7bhrnj7enet296entdj5drb@4ax.com>
Message-ID: <FzgUd.21875$_n3.2717739@phobos.telenet-ops.be>

Alan Gauld wrote:
> I was playing with lambdas and list compregensions and came
> across this unexpected behaviour:
> 
> 
>>>>adds = [lambda y: (y + n) for n in range(10)]
>>>>adds[0](0)
> 
> 9
> 
>>>>for n in range(5): print adds[n](42)
> 
> ...
> 42
> 43
> 44
> 45
> 46
> 
>>>>adds[0](0)
> 
> 4
> 
> Can anyone explain the different answers I'm getting?
> FWIW the behaviour I expected was what seems to happen inside 
> the for loop... It seems to somehow be related to the 
> last value in the range(), am I somehow picking that up as y?
> If so why?

You're picking it up not as y but as n, since n in the lambda is
evaluated when you call the lambde, not when you define it.

Or is that just a coincidence? And why did it work
> inside the for loop?

In the loop you are giving n exactly the values you intended it to have
inside the lambda. Check what happens when you use a different loop
variable:

>>> for i in range(5): print adds[i](0)

9
9
9
9
9

I guess you could something like this instead:

>>> adds=[]
>>> for n in range(10):
	def f(y, n=n): return y+n
	adds.append(f)

	
>>> adds[0](0)
0
>>> adds[0](5)
5
>>> adds[9](5)
14

-- 
"Codito ergo sum"
Roel Schroeven


From mwm at mired.org  Thu Feb 17 20:12:43 2005
From: mwm at mired.org (Mike Meyer)
Date: Thu, 17 Feb 2005 19:12:43 -0600
Subject: os.walk()
References: <cv29o3$ror$1@solaris.cc.vt.edu>
Message-ID: <86zmy2hdro.fsf@guru.mired.org>

rbt <rbt at athop1.ath.vt.edu> writes:

> Could someone demonstrate the correct/proper way to use os.walk() to
> skip certain files and folders while walking a specified path? I've
> read the module docs and googled to no avail and posted here about
> other os.walk issues, but I think I need to back up to the basics or
> find another tool as this isn't going anywhere fast... I've tried this:
>
> for root, dirs, files in os.walk(path, topdown=True):
>
>      file_skip_list = ['file1', 'file2']
>      dir_skip_list = ['dir1', 'dir2']
>
>      for f in files:
>          if f in file_skip_list
>              files.remove(f)
>
>      for d in dirs:
>          if d in dir_skip_list:
>              dirs.remove(d)
>
>      NOW, ANALYZE THE FILES
>
> And This:
>
>      files = [f for f in files if f not in file_skip_list]
>      dirs = [d for d in dirs if dir not in dir_skip_list]
>
>      NOW, ANAYLZE THE FILES
>
> The problem I run into is that some of the files and dirs are not
> removed while others are. I can be more specific and give exact
> examples if needed. On WinXP, 'pagefile.sys' is always removed, while
> 'UsrClass.dat' is *never* removed, etc.

As other have pointed out, the problem you are running into is that
you are modifying the list while looping over it. You can fix this by
creating copies of the list. No one has presented the LC version yet:

         for rl, dl, fl in os.walk(path, topdown=True):
             file_skip_list = ('file1', 'file2')  #*
             dir_skip_list = ('dir1', 'dir2')
             
         files = [f for f in fl if not f in file_skip_list]
         dirs = [d for d in dl if not d in dir_skip_list]

         # Analyze files and dirs
         
If you're using 2.4, you might consider using generators instead of
LC's to avoid creating the second copy of the list:

     files = (f for f in fl if not f in file_skip_list)
     dirs = (d for d in dl if not d in dir_skip_list)

     <mike

*) I changed the short list to short tuples, because I use tuples if
I'm not going to modify the list.
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From john.abel at pa.press.net  Fri Feb 18 09:27:49 2005
From: john.abel at pa.press.net (John Abel)
Date: Fri, 18 Feb 2005 14:27:49 +0000
Subject: Annoying Socket Problem
Message-ID: <4215FB65.6090406@pa.press.net>

I'm hoping this is something simple, and someone can point me in the 
right direction here.  I have a class based on SocketServer 
(ThreadingTCPServer), and I've used makefile on the socket so I use the 
"for in " routine.  My client sends it a small amount of data.  However, 
both programs appear to hang once the data has been sent, obviously 
something to do with flushing.

I'd appreciate any pointers.

Regards

J

Server Class:

class _DBSocketHandler( SocketServer.BaseRequestHandler ):
   
    xmlStart = re.compile( "XML-START" )
    xmlEnd = re.compile( "XML-END" )
   
    def handle( self ):
        print "Accepted Connection From", self.client_address
        socketIn = self.request.makefile( 'r' )
        socketOut = self.request.makefile( 'wb' )
        remoteDoc = None
        for dataIn in socketIn:
            if self.xmlEnd.match( dataIn ):
                remoteDoc.close()
                break
            if self.xmlStart.match( dataIn ):
                print "Receiving XML"
                remoteDoc = StringIO()
                continue
               
            if remoteDoc is not None:
                remoteDoc.write( dataIn )
               
        socketOut.write( "Got Yer XML File, Thanks" )

Client Code:

    def connect( self ):
        self.socketCon.connect( ( self.dbServer, self.dbPort ) )
        testFile = StringIO.StringIO( testXML )
        self.socketCon.send( "XML-START" )
        for xmlSQL in testFile:
            self.socketCon.send( xmlSQL )
        testFile.close()
        self.socketCon.send( "XML-END" )
        self.socketCon.send( "" )
        time.sleep(10)
        while True:
            dataRec = self.socketCon.recv( 8192 )
            if not dataRec: break
        self.socketCon.close()


From fredrik at pythonware.com  Fri Feb 18 14:03:49 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 18 Feb 2005 20:03:49 +0100
Subject: Probably over my head... Trying to get Font Names
References: <B8KdneiuyLaKoYjfRVn-vQ@adelphia.com>
Message-ID: <cv5e0d$i59$1@sea.gmane.org>

"Samantha" <samantha7395 at hotmail.com> wrote:

>I am attempting to extract the Font Names from the installed windows fonts. I am having a heck of a 
>time getting these rather than the file names. Examples can be seen by going to Control Panel > 
>Fonts

here's one way to do it (using Tkinter):

>>> import Tkinter, tkFont
>>> tk = Tkinter.Tk()
>>> tkFont.families()
('System', 'Terminal', 'Fixedsys', 'Roman', 'Script', 'Modern', 'Small Fonts', 'MS Serif', ...)

here's another way (using PIL):

import os
from PIL import ImageFont

fontdir = os.path.join(os.environ["windir"], "fonts")

for fontfile in os.listdir(fontdir):
  try:
    font = ImageFont.truetype(os.path.join(fontdir, fontfile), 1)
  except IOError:
    pass
  else:
    print font.font.family, font.font.style

(this prints a list of family/style combinations).  You can get PIL from

    http://www.pythonware.com/products/pil/ (1.1.4)
    http://effbot.org/downloads/#pil (1.1.5 betas)

</F> 





From pf_moore at yahoo.co.uk  Mon Feb 21 12:33:34 2005
From: pf_moore at yahoo.co.uk (Paul Moore)
Date: Mon, 21 Feb 2005 17:33:34 +0000
Subject: Unittest - testing properties (read-only attributes)
References: <uu0o5c0br.fsf@yahoo.co.uk>
	<roy-7E7A58.12112821022005@reader2.panix.com>
	<uaKdncr3ppCbhIffRVn-rA@powergate.ca>
Message-ID: <upsytbyxd.fsf@yahoo.co.uk>

Peter Hansen <peter at engcorp.com> writes:

> Roy Smith wrote:
>> You want something like
>> self.assertRaises(AttributeError, lambda: self.combat.value = 1)
>
> Or, combining the two responses and avoiding the lambda:
>
>  self.assertRaises(AttributeError, setattr, self.combat, 'value', 1)
>
> Hmm... this might be a case where the lambda form is actually the
> more readable one...

Thanks, I hadn't thought of setattr. I was bitten by the "assignment
is a statement, so can't be used in a lambda" issue, as well :-)

Paul.
-- 
It was a machine, and as such only understood one thing. Being clobbered
with big hammers was something it could relate to. -- Tom Holt


From almondb at gmail.com  Wed Feb  9 05:50:50 2005
From: almondb at gmail.com (Brian)
Date: 9 Feb 2005 02:50:50 -0800
Subject: Success using Python .NET with py2exe?
In-Reply-To: <1107938006.074283.159590@c13g2000cwb.googlegroups.com>
References: <1107938006.074283.159590@c13g2000cwb.googlegroups.com>
Message-ID: <1107946250.292983.254030@l41g2000cwc.googlegroups.com>

I haven't spent any time recently with it, but I seem to recall having
more success using cx_Freeze for packaging than with py2exe (when using
Python.NET).  In the time since I then, I suspect all of the packagers
have gotten more sophisticated, and you might have more options.

A good place for questions like these is the Python.NET list:
http://mail.python.org/mailman/listinfo/pythondotnet



From jdadson at yahoo.com  Wed Feb  9 16:57:15 2005
From: jdadson at yahoo.com (Jive Dadson)
Date: Wed, 09 Feb 2005 21:57:15 GMT
Subject: Name of type of object
References: <4209A52C.A1C40311@yahoo.com> <bEiOd.83727$Tf5.12604@lakeread03>
	<J8adnUGW461nV5TfRVn-rA@comcast.com>
	<36uo36F54okd6U1@individual.net>
Message-ID: <420A8774.638D88E8@yahoo.com>


I don't think I've quite got it.

The application I'm writing has some similarities to an interactive
shell.  Like an interactive shell, it executes arbitrary code that it
receives from an input stream.  When it gets an exception, it should
create an informative message, regardless of the type of exception.  The
traceback routine does that, somehow, some way, but I've tried to read
that code and figure out how and I don't get it.

The best I have so far is,

class Exec_thread(BG_thread):
	""" Execute a line of code in the global namespace. """
	def _process(s):
		""" Process one instruction """
		try:
			exec s.product in globals()
		except (Exception), e:
			handle_error( typename(e)+ ": " + str(e) )


But that works only if the exception happens to be derived from
Exception.  How do I handle the
general case?


From snacktime at gmail.com  Mon Feb 14 20:04:10 2005
From: snacktime at gmail.com (snacktime)
Date: Mon, 14 Feb 2005 17:04:10 -0800
Subject: regular expression question
Message-ID: <1f060c4c050214170425021677@mail.gmail.com>

The primary question is how do I perform a match when the regular
expression contains string variables?  For example, in the following
code I want to match a line that starts with STX, then has any number
of characters, then ends with STX.
Example 2 I'm pretty sure works as I expect, but I'm not sure about
Example 1, and I'm pretty sure about example 3.

import re
from curses.ascii import STX,ETX,FS
STX =  chr(STX)
ETX =  chr(ETX)
FS =  chr(FS)
data = STX + "ONE" + FS + "TWO" + FS + "THREE" + ETX
match = STX + '(.*)' + ETX

# Example 1
# This appears to work, but I'm not sure if the '+' is being used in
the regular expression, or if it's just joining STX, '(.*)', and ETX.

if re.search(STX + '(.*)' + ETX,data):
  print "Matches"

# Example 2
# This also appears to work
if re.search(match,data):
  print "Matches"

# Example 3
# Doesn't work, as STX and ETX are evaluated as the literal strings
'STX' and 'ETX'
if re.search('STX(.*)ETX', data):
  print "Matches"

Chris


From Chris48224 at yahoo.com  Fri Feb 11 18:37:04 2005
From: Chris48224 at yahoo.com (Chris48224 at yahoo.com)
Date: 11 Feb 2005 15:37:04 -0800
Subject: A REAL money maker.  IT WORKS!!!!
Message-ID: <1108165024.726009.289520@g14g2000cwa.googlegroups.com>

Try this out, it works!!!! Turn $10 into $10,000 with PayPal, easy and
quick. PLEASE TAKE A MOMENT TO READ THIS INFORMATION. THIS REALLY
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MY PAYPAL ACCOUNT." -Mark 2004

Dear Friend,
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along with it. If not, this is the FASTEST and EASIEST way to earn
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You won't need to run a website, or make phone calls, or make
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advertising, etc. The only things you will need are:
* an email address
* A Premier or Business PayPal account with at least $10 deposited in
it
* 30 minutes of your time

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YOU NEED TO DO:

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Ok, if you're not already a PayPal user, the very first thing you
need to do is
use the PayPal link below and SIGN UP. It takes just two minutes!
Here's the URL. Just click on the PayPal link below:
https://www.paypal.com/cgi-bin/webscr?cmd=_registration-run
Be sure to use this link so you can sign up for a free PREMIER or
BUSINESS
account. You'll need to have a PREMIER or BUSINESS account (and not a
PERSONAL account) otherwise you won't be able to receive credit card
payments from other people.

STEP 2
It is an undeniable law of the universe that we must first give in
order to receive. So the first thing to do when you have your
Premier/Business PayPal account is to IMMEDIATELY send a $10 payment
from your PayPal account to the person at POSITION #1, if...
Your birthday is BETWEEN JAN 1 THRU JUNE 30,
OR, if...
-- your birthday is BETWEEN JULY 1 THRU DEC 31, send the
gift to the person at POSITION # 2.
Along with a note saying: "HERE IS A $10 GIFT FOR YOU." Be certain to
add this note, as this is what KEEPS THIS PROGRAM LEGAL. Instructions
on how to send a payment are under "SEND MONEY" at the PayPal Site.
It's so Easy!!! When you send your $10 payment to the first address
in the list, do it with a great big smile on your face because "as you
sow, so shall you reap!"  When this program is continued, as it should
be, EVERYONE PROFITS!! DON?T BE AFRAID to send gifts to strangers. It
will come back to you ten folds. A person can give you up to $10,000
per year and you don't have to report it to the IRS!
Here are the current positions:
* POSITION#1 --- chris48224 at yahoo.com
* POSITION#2 --- executioner_2k at yahoo.com
(sorry the emails don't show up correctly on these Google posts in @
format, change them to ___ at ___. ___)
After you have transferred a $10 payment to the email address,
something very eerie happens. It gives you an indescribable,
overwhelming sense of certainty, belief and conviction in the system.
You've just proved to yourself that, because you have done it, there
must be a great number of other people ready to do exactly the same.
Thus you have now seen for yourself, first hand, that this business
actually works!
REMOVE the email address you are replacing (the one you sent $10 to),
and REPLACE it with your own email address. REMEMBER: Use the same
EMAIL ADDRESS that is used with YOUR PayPal account!!! Paste your newly
typed email address over the old one and then post to 50 Message
Boards, Chat Rooms, or Newsgroups. DON?T MULL OVER IT, JUST 30MIN OF
YOUR TIME, THAT?S IT THERE IS NO MORE TO DO!! ACT FAST AND GET THE
GIFT. HONESTLY AND INTEGRITY MAKE THIS PLAN WORK!! DO TO OTHERS, AS YOU
WOULD HAVE THEM DO TO YOU. YOUR NAME COULD CYCLE FOR A LONG TIME! !
THIS MAKES IT THE GIFT THAT KEEPS ON GIVING.

This is excellent seed money to start or expand a business, buy you
dream home, car, and pay off whatever bills you may have. Good luck and
God Bless. Play fairly. Good fortune will follow. WHY THIS PROGRAM
WORKS:
!! HONESTY AND INTEGRITY!! Straight to the point, the reason this
program is SO SUCCESSFUL is because when you follow these instructions
EXACTLY = GIVE A $10 GIFT and POST this in 50 different message boards,
there are only TWO outcomes. (1) A person's birthday will fall on the
same half as yours, therefore, YOU GET
THE $10... OR, (2) a persons birthday will fall on the other half of
the timeline, therefore, YOU STAY IN YOUR POSITION and get posted in 50
other MESSAGE BOARDS, etc. BOTTOMLINE: Either you get the $10 or your
name gets passed on for other people to give YOU $10 or pass YOUR name
on to other people that will. It makes you think though, the more you
POST YOUR OWN POSTS, the BETTER the results!!!

4 FACTORS THAT MAKE THIS PROGRAM SO SUCCESSFUL...
* EXTREMELY FAST RESPONSE
* EXTREMELY HIGH RESPONSE RATE
* UNLIMITED PROFIT POTENTIAL
* QUICK, SIMPLE AND CHEAP TO GET STARTED

So there it is. You now have the knowledge that will enable you to make
over $10,000 within the next two weeks. The only thing that can hold
you back now is a lack of faith or a lack of self-belief. However, any
doubts you may currently have will disappear within a few days of
putting this plan into practice. Trust me on this! You certainly
won't regret it. SOME NOTES FROM PAYPAL WHICH YOU MAY FIND USEFUL:
PayPal lets you pay anyone with an email address and is the world's
Number 1 online payment service. PayPal is accepted on over 3 million
eBay auctions as well as a countless number of online shops. You can
also use PayPal to pay your friends - for example, it's a convenient
way to split the phone bill with your room-mate, send cash to your kids
in college, or send cash to someone in another country. Better yet, you
can also earn a referral bonus of up to $100 each time someone signs up
for a PayPal account using your referral URL! When you send money
through PayPal, you can fund your payments with your credit card or
checking account. You won't have to worry about your privacy, because
PayPal keeps your accounting information safe and secure. Making a
purchase with PayPal is far more secure than mailing a check or giving
your credit card number to a stranger. That's why over 9 MILLION
people from around the world use PayPal to move money. Signing up for a
PayPal account is free, easy, and it takes only a couple of minutes.
Thank you, and good luck in your ventures P.S. Does this sound too
good? Well maybe to some skeptics it is. But it actually works, and is
worth the 30 minutes of your time now. So, just make a nice cup of tea
and get started on it now. After all, you can't lose, but you stand
to gain more in the next few weeks than many people earn in a year.



From deetsNOSPAM at web.de  Mon Feb 21 10:16:13 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 21 Feb 2005 16:16:13 +0100
Subject: lambda closure question
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
	<slrnd1jjo4.jkb.apardon@rcpc42.vub.ac.be>
	<mailman.2891.1108988864.22381.python-list@python.org>
	<slrnd1jlne.jkb.apardon@rcpc42.vub.ac.be>
	<37u4dpF5cboqvU1@individual.net>
	<7xsm3qc700.fsf@ruckus.brouhaha.com>
Message-ID: <37uc7rF5igk7fU1@individual.net>

Paul Rubin wrote:

> "Diez B. Roggisch" <deetsNOSPAM at web.de> writes:
>> It's not only that way in python, but in java too. So it seems that there
>> is a fundamental principle behind it: In a language that allows
>> sideeffects, these will actually happen.
> 
> Can you even have nested functions in Java?  Algol-60 did things the
> way you'd expect, i.e. you can modify the outer variable from the
> inner scope.

Not nested functions, but closures in anonymous inner classes - which can
reference only final variables, thus creating the same effect as the
scoping rules of python.

-- 
Regards,

Diez B. Roggisch


From paul at boddie.org.uk  Tue Feb 22 10:00:27 2005
From: paul at boddie.org.uk (Paul Boddie)
Date: 22 Feb 2005 07:00:27 -0800
Subject: UTF-8 / German,
	Scandinavian letters - is it really this difficult?? Linux &
	Windows XP
References: <cve1vh$c37$1@phys-news1.kolumbus.fi>
Message-ID: <5339b60d.0502220700.3ec7ae56@posting.google.com>

Mike Dee <mike-dekrunjil at mailblocks.com> wrote in message news:<cve1vh$c37$1 at phys-news1.kolumbus.fi>...
> A very very basic UTF-8 question that's driving me nuts:
> 
> If I have this in the beginning of my Python script in Linux:
> 
> #!/usr/bin/env python
> # -*- coding: UTF-8 -*-
> 
> should I - or should I not - be able to use non-ASCII characters 
> in strings

For string literals, with the "coding" declaration, Python will accept
that the bytes sitting in your source file inside the string literal
didn't get there by accident - ie. that you meant to put the bytes
[0xC3, 0xA6, 0xC3, 0xB8, 0xC3, 0xA5] into a string when you entered
"???" in a UTF-8-enabled text editor. (Apologies if you don't see the
three Scandinavian characters properly there in your preferred
newsreader.)

For Unicode literals (eg. u"???" in that same UTF-8-enabled text
editor), Python will not only accept the above but also use the
"coding" declaration to produce a Unicode object which unambiguously
represents the sequence of characters - ie. something that can be
used/processed to expose the intended characters in your program at
run-time without any confusion about which characters are being
represented.

>            and in Tk GUI button labels and GUI window titles and in 
> raw_input data without Python returning wrong case in manipulated 
> strings and/or gibberished characters in Tk GUI title?

This is the challenging part. Having just experimented with using both
string literals and Unicode literals with Tkinter on a Fedora Core 3
system, with a program edited in a UTF-8 environment and with a
ubiquitous UTF-8-based locale, it's actually possible to write
non-ASCII characters into those literals and to get Tkinter to display
them as I intended, but I've struck lucky with that particular
combination - a not entirely unintended consequence of the Red Hat
people going all out for UTF-8 everywhere (see below for more on
that).

Consider this snippet (with that "coding" declaration at the top):

  button1["text"] = "???"
  button2["text"] = u"???"

In an environment with UTF-8-enabled editors, my program running in a
UTF-8 locale, and with Tk supporting treating things as UTF-8 (I would
imagine), I see what I intended. But what if I choose to edit my
program in an editor employing a different encoding? Let's say I enter
the program in an editor employing the mac-iceland encoding, even
declaring it in the "coding" declaration at the top of the file.
Running the program now yields a very strange label for the first
button, but a correct label for the second one.

What happens is that with a non-UTF-8 source file, running in a UTF-8
locale with the same Tk as before, the text for the first button
consists of a sequence of bytes that Tk then interprets incorrectly
(probably as ISO-8859-1 as a sort of failsafe mode when it doesn't
think the text is encoded using UTF-8), whereas the text for the
second button is encoded from the unambiguous Unicode representation
and is not misunderstood by Tk.

Now, one might argue that I should change the locale to suit the
encoding of the text file, but it soon becomes very impractical to
take this approach. Besides, I don't think mac-iceland (an admittedly
bizarre example) forms part of a supported locale on the system I have
access to.

> With non-ASCII characters I mean ( ISO-8859-1 ??) stuff like the 
> German / Swedish / Finnish / etc "umlauted" letter A  (= a diaresis; 
> that is an 'A' with two dots above it, or an O with two dots above.)
> 
> In Linux in the Tk(?) GUI of my 'program' I get an uppercase "A" 
> with a tilde above - followed by a general currency symbol ['spider']. 
> That is, two wrong characters where a small umlauted letter "a" 
> should be.

That sort of demonstrates that the bytes used to represent your
character are produced by a UTF-8 encoding of that character. Sadly,
Tk then chooses to interpret them as ISO-8859-1, I guess. One thing to
verify is whether Tk is aware of anything other than ISO-8859-1 on
your system; another thing is to use Unicode objects and literal to at
least avoid the guessing games.

> But in Windows XP exactly the *same* code (The initiating "#!/usr/bin
> /env python" and all..) works just fine in the Tk GUI - non-ascii 
> characters showing just as they should. (The code in both cases is 
> without any u' prefixes in strings.)

It's pretty much a rule with internationalised applications in Python
that Unicode is the way to go, even if it seems hard at first. This
means that you should use Unicode literals in your programs should the
need arise - I can't say it does very often in my case.

> I have UTF-8 set as the encoding of my Suse 9.2 / KDE localization, I 
> have saved my 'source code' in UTF-8 format and I have tried to read
> *a lot* of information about Unicode and I have heard it said many 
> times that Python handles unicode very well -- so why can it be so 
> bl**dy difficult to get an umlauted (two-dotted) letter a to be 
> properly handled by Python 2.3? In Windows I have Python 2.4 - but the 
> following case-insanity applies for Windows-Python as well:

Python does handle Unicode pretty well, but it's getting the data in
and out of Python, combined with other components and their means of
presenting/representing that data which is usually the problem.

> For example, if I do this in my Linux konsole (no difference whether it 
> be in KDE Konsole window or the non-gui one via CTRL-ALT-F2):
> 
> >>>aoumlautxyz="12xyz"       # number 1 = umlauted a, number 2 = uml o 
> >>>print aoumlautxyz.(upper)
> 
> then the resulting string is NOT all upper case - it is a lowercase 
> umlauted a, then a lowercase umlauted o then uppercase XYZ

In this case, you're using normal strings which are effectively
locale-dependent byte strings. I guess that what happens is that the
byte sequence gets passed to the system's string processing routines
which then fail to convert the non-ASCII characters to upper case
according to their understanding of what the bytes actually mean in
terms of being characters. I'll accept that consoles can be pretty
nasty in exposing the right encoding to Python (search for "setlocale"
in the comp.lang.python archives) and that without some trickery you
won't get decent results. However, by employing Unicode objects and
explicitly identifying the encoding of the input, you should get the
results you are looking for:

  aoumlautxyz=unicode("??xyz", "utf-8")

This assumes that UTF-8 really is the encoding of the input.

[...]

> One can hardly expect the users to type characters like unicode('\xc3\
> xa4\xc3\xb6\xc3\xbc', 'utf-8')u'\xe4\xf6\xfc' u"???".encode('utf-8') or 
> whatnot, and encode & decode to and fro till the cows come home just to 
> get a letter or two in their name to show up correctly.

With a "coding" declaration and Unicode literals, you won't even need
to use the unicode constructor. Again, I must confess that much of the
data I work with doesn't originate in the program code itself, so I
rarely need to even think of this issue.

> It's a shame that the Linux Cookbook, Learning Python 2nd ed, Absolute 
> beginners guide to Python, Running Linux, Linux in a Nutshell, Suse 9.2 
> Pro manuals and the online documentation I have bumped into with Google
> (like in unicode.org or python.org or even the Python Programming Faq 
> 1.3.9 / Unicode error) do not contain enough - or simple enough - 
> information for a Python/Linux newbie to get 'it'.

One side-effect of the "big push" to UTF-8 amongst the Linux
distribution vendors/maintainers is the evasion of issues such as
filesystem encodings and "real" Unicode at the system level. In
Python, when you have a Unicode object, you are dealing with idealised
sequences of characters, whereas in many system and library APIs out
there you either get back a sequence of anonymous bytes or a sequence
of UTF-8 bytes that people are pretending is Unicode, right up until
the point where someone recompiles the software to use UTF-16 instead,
thus causing havoc. Anyone who has needed to expose filesystems
created by Linux distributions before the UTF-8 "big push" to later
distributions can attest to the fact that the "see no evil" brass
monkey is wearing a T-shirt with "UTF-8" written on it.

Paul


From ramen at lackingtalent.com  Thu Feb  3 11:06:08 2005
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Thu, 03 Feb 2005 16:06:08 -0000
Subject: Nested scopes and class variables
References: <slrncvrlne.a43.ramen@lackingtalent.com>
	<mailman.1628.1107166552.22381.python-list@python.org>
Message-ID: <slrnd04ivf.83i.ramen@lackingtalent.com>

Thanks, Nick and Alex, for the nice, detailed explanations. My understanding
of Python bytecode is not deep enough to comment at this time. ;)

-- 
 .:[ dave benjamin: ramen/[sp00] -:- spoomusic.com -:- ramenfest.com ]:.
        "talking about music is like dancing about architecture."


From quentel.pierre at wanadoo.fr  Fri Feb  4 23:51:10 2005
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Sat, 05 Feb 2005 05:51:10 +0100
Subject: how to send an int over a socket
In-Reply-To: <mailman.1942.1107570470.22381.python-list@python.org>
References: <mailman.1942.1107570470.22381.python-list@python.org>
Message-ID: <420450c6$0$19414$8fcfb975@news.wanadoo.fr>

Use string formatting :

msglen = '%16s' %len(testmessage)

will return a 16-byte string, beginning with spaces. Send it over your 
connection and use int() to get the message length

Pierre


From tjreedy at udel.edu  Sun Feb 13 17:58:24 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 13 Feb 2005 17:58:24 -0500
Subject: Iterator / Iteratable confusion
References: <420a5c1e$0$21630$a1866201@visi.com><slrnd0q67t.52v.curty@einstein.electron.net><200502131848.03655.francis.girard@free.fr>
	<200502131958.27410.francis.girard@free.fr>
Message-ID: <cuolu7$qv7$1@sea.gmane.org>


"Francis Girard" <francis.girard at free.fr> wrote in message 
news:200502131958.27410.francis.girard at free.fr...
> An ""iteratable"" class is a class supporting the __iter__ method which 
> should
> return an ""iterator"" instance, that is, an instance of a class 
> supporting
> the "next" method.

Not quite right, see below.

> An iteratable, strictly speaking, doesn't have to support the "next" 
> method

An iterable with a next method is, usually, an iterator.

> an "iterator" doesn't have to support the "__iter__" method

Yes it does.  iter(iterator) is iterator is part of the iterater protocol 
for the very reason you noticed...

>(but this breaks the iteration protocol as we will later see).

Iterators are a subgroup of iterables.  Being able to say iter(it) without 
having to worry about whether 'it' is just an iterable or already an 
iterator is one of the nice features of the new iteration design.

Terry J. Reedy






From doodle4 at gmail.com  Mon Feb 14 18:21:50 2005
From: doodle4 at gmail.com (doodle4 at gmail.com)
Date: 14 Feb 2005 15:21:50 -0800
Subject: Multidimensional arrays - howto?
Message-ID: <1108423310.463006.318320@f14g2000cwb.googlegroups.com>

Hello all,

I am trying to convert some C code into python. Since i am new to
python, i would like to know how to deal with multidimensional arrays?

Thanks,
-Joe

Here's a snippet of what i am trying to convert:

# define table0 15
# define table1 20

unsigned int Table[table0][table1]

if(Table[table0][table1] != 0)
    {
         Table[table0][table1]--
    }



From vesko8 at yahoo.com  Fri Feb 18 15:55:13 2005
From: vesko8 at yahoo.com (john14)
Date: Fri, 18 Feb 2005 15:55:13 -0500
Subject: xmlrpc.server.work() does not seem to handle multiple requests
Message-ID: <018be98bd7f75da932445488d3263748@localhost.talkaboutprogramming.com>

Hi,

I have an xmlrpc server. I using the python package
xmlrpc. Here is what I am doing:

    s = xmlrpc.server()
    s.addMethods(method_hash)
    s.bindAndListen(PORT)
    while 1:
        try:
            s.work()
        except:
            e = sys.exc_info()

The problem is that when I send multiple requests they are queued and
processed one after the other. Is there some other method that will allow
me to process multiple request at the same time?

Thank You



From rkern at ucsd.edu  Wed Feb  2 22:04:46 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Wed, 02 Feb 2005 19:04:46 -0800
Subject: Reinstall python 2.3 on OSX 10.3.5?
In-Reply-To: <1107388080.703032.116150@g14g2000cwa.googlegroups.com>
References: <1107388080.703032.116150@g14g2000cwa.googlegroups.com>
Message-ID: <cts4cd$nik$1@news1.ucsd.edu>

moa at extrapolation.com wrote:
> Hi there
> 
> I started a very long and roundabout process of attempting to install
> python 2.3.4 along side my apple-installed 2.3 system. To make a long
> story short, I have completely confabulated my environment ( i deleted
> the 2.3 binaries and so forth from the system in an attempt to start
> things fresh), and now I cannot figure out how to reinstall the base
> 2.3 Apple python distribution.
> Can somebody please point me in the right direction?

Borrow Guido's time machine and prevent your former self from doing 
that. OS X depends on it's python being there untouched. They also have 
compiled stuff that does not exist in the standard Python distribution.

Back up your data and reinstall the OS.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From maxime_phan at hotmail.com  Wed Feb  9 23:08:59 2005
From: maxime_phan at hotmail.com (maxime)
Date: 9 Feb 2005 20:08:59 -0800
Subject: pygame and music
Message-ID: <4cc9a89e.0502092008.249582ac@posting.google.com>

Hi, I try to develop a game in python and pygame.
In my game I play a music (.mid with pygame.mixer.music) but sometime
I need to accelerate it but I don't see how to do that with pygame. Is
it possible? If not, do you know an other python music lib that do
that?
Thanks a lot


From fredrik at pythonware.com  Wed Feb  9 15:39:21 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 9 Feb 2005 21:39:21 +0100
Subject: two questions - no common theme
References: <e5063e96.0502091207.37b1dd54@posting.google.com>
Message-ID: <cudsa8$6hn$1@sea.gmane.org>

Sean McIlroy wrote:

> 1) I'd like to be able to bind callbacks to presses of the arrow
> buttons on the keyboard. How do you say that in Tkinter?

<Up>, <Down>, <Left>, <Right>

http://effbot.org/books/tkinterbook/events-and-bindings.htm

    For an ordinary 102-key PC-style keyboard, the special keys are Cancel
    (the Break key), BackSpace, Tab, Return(the Enter key), Shift_L (any
    Shift key), Control_L (any Control key), Alt_L (any Alt key), Pause,
    Caps_Lock, Escape, Prior (Page Up), Next (Page Down), End, Home,
    Left, Up, Right, Down, Print, Insert, Delete, F1, F2, F3, F4, F5, F6,
    F7, F8, F9, F10, F11, F12, Num_Lock, and Scroll_Lock.

> 2) The function 'listdir' in os.path returns a list of all the files
> in the given directory - how do I get hold of a list of its
> subdirectories?

listdir returns files and directories; use os.path.isdir(path) to check if path is
a directory:

    for name in os.listdir(path):
        p = os.path.join(path, name)
        if os.path.isdir(p):
            ...

</F> 





From tzot at sil-tec.gr  Thu Feb 17 08:56:11 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 17 Feb 2005 15:56:11 +0200
Subject: Why Tk treat F10, F11, F12 diferently from F1...F9?
References: <5175a81c05021216415204de93@mail.gmail.com>
	<20050213014425.GB24076@unpythonic.net>
	<mailman.2470.1108260638.22381.python-list@python.org>
Message-ID: <8j89119f988ptskat69shtire8r2ha9mr0@4ax.com>

On Sun, 13 Feb 2005 00:10:35 -0200, rumours say that "Gabriel B."
<gabriel.barros at gmail.com> might have written:

[snip: F10 in Motif activates the menu bar]

>i'm on windowsXP (what makes the F10 biding by "default" even more
>weird). Well, for now using the keysym_num will be more safe since i'm
>still getting they correct.

It's not weird, it's the same in Windows as far as I remember (windows 3.0).
F10 is the same as depressing Alt.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From gabriel.barros at gmail.com  Tue Feb  8 09:20:41 2005
From: gabriel.barros at gmail.com (Gabriel B.)
Date: Tue, 8 Feb 2005 12:20:41 -0200
Subject: Big development in the GUI realm
In-Reply-To: <4207D64F.2000709@optushome.com.au>
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<cu8h8k$md4$1@sea.gmane.org> <4207D64F.2000709@optushome.com.au>
Message-ID: <5175a81c05020806207f9f77ce@mail.gmail.com>

> >>Considering the fact that the Qt DLL exist by themselves, that the
> >>version used is the one provided by Qt, and that the EXE uses a
> >>standard, open way to communicate with it, the above does seem to say
> >>this use would be valid.
> >>
> >>
> >
> >    http://www.gnu.org/licenses/gpl-faq.html#MereAggregation
> >
> >    "/.../ If modules are designed to run linked together in a shared address
> >    space, that almost surely means combining them into one program.
> >
> >    By contrast, pipes, sockets and command-line arguments are
> >    communication mechanisms normally used between two separate
> >    programs. So when they are used for communication, the modules
> >    normally are separate programs. But if the semantics of the
> >    communication are intimate enough, exchanging complex internal
> >    data structures, that too could be a basis to consider the two parts
> >    as combined into a larger program."
> >
> ></F>

This is odd. They claim it's a GPL'ed version, but it's a trolltech
license that forces you to release your code under gpl even tought
their's not!

I'm not against a company getting it's share with their product.
that's what motivated them in the first place. but DONT LIE! don't
call it gpl when it's not.

Gpl make it very explicity it deals with the program as a whole, in
the meaning of a executable code. What they're trying to achive here
is that, by adding this paragraph, they will cover the "dll use" under
the gpl.

By that cover-all definition they came up, i can't use Internet
Explorer to see a site hosted with a gpl'ed server! i can't even use a
BSD program to grep a file!

anyway... it will only mater when people with money cares. I already
have 3 choices.


From aleaxit at yahoo.com  Sun Feb  6 15:36:06 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 6 Feb 2005 21:36:06 +0100
Subject: empty classes as c structs?
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>
	<mailman.1973.1107618702.22381.python-list@python.org>
	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>
	<mailman.2006.1107658273.22381.python-list@python.org>
	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>
Message-ID: <1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>

Steven Bethard <steven.bethard at gmail.com> wrote:

> Hmm... interesting.  This isn't the main intended use of 
> Bunch/Struct/whatever, but it does seem like a useful thing to have...
> I wonder if it would be worth having, say, a staticmethod of Bunch that
> produced such a view, e.g.:
> 
> class Bunch(object):
>      ...
>      @staticmethod
>      def view(data):
>          result = Bunch()
>          result.__dict__ = data
>          return result
> 
> Then you could write your code as something like:
> 
> gbls = Bunch.view(globals())
> 
> I'm probably gonna need more feedback though from people though to know
> if this is a commonly desired use case...

Reasonably so, is my guess.  Witness the dict.fromkeys classmethod -- it
gives you, on dict creation, the same kind of nice syntax sugar that
wrapping a dict in a bunch gives you for further getting and setting
(and with similar constraints: all keys must be identifiers and not
happen to clash with reserved words).

I think this ``view'' or however you call it should be a classmethod
too, for the same reason -- let someone handily subclass Bunch and still
get this creational pattern w/o extra work.  Maybe a good factoring
could be something like:

class Bunch(object):

    def __init__(self, *a, **k):
        self.__dict__.update(*a, **k)

    def getDict(self):
        return self.__dict__

    def setDict(self, adict):
        self.__dict__ = adict

    theDict = property(getDict, setDict, None, 
                       "direct access to the instance dictionary"
                      )

    @classmethod
    def wrapDict(cls, adict, *a, **k):
        result = cls.__new__(cls, *a, **k)
        result.setDict(adict)
        cls.__init__(result, *a, **k)
        return result

I'm thinking of use cases where a subclass of Bunch might override
setDict (to do something else in addition to Bunch.setDict, e.g.
maintain some auxiliary data structure for example) -- structuring
wrapDict as a classmethod in a ``Template Method'' DP might minimize the
amount of work, and the intrusiveness, needed for the purpose.  (I don't
have a real-life use case for such a subclass, but it seems to cost but
little to provide for it as a possibility anyway).

[[given the way property works, one would need extra indirectness in
getDict and setDict -- structuring THEM as Template Methods, too -- to
fully support such a subclass; but that's a well-known general issue
with property, and the cost of the extra indirection -- mostly in terms
of complication -- should probably not be borne here, it seems to me]]


Alex


From tzot at sil-tec.gr  Thu Feb 10 11:18:36 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 10 Feb 2005 18:18:36 +0200
Subject: goto, cls, wait  commands
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
Message-ID: <sk1n015sc53v28ln0m6he9e4co7mkcf42u@4ax.com>

On Thu, 10 Feb 2005 16:59:04 +0100, rumours say that BOOGIEMAN
<BOOGIEMANPN at YAHOO.COM> might have written:

Best advice: try to forget QBasic, and try again reading the tutorial.  That, if
your post is serious.  If it isn't, keep reading my reply :)

>I've just finished reading Python turtorial for non-programmers
>and I haven't found there anything about some usefull commands I used in
>QBasic. First of all, what's Python command equivalent to QBasic's "goto" ?

goto for python:

http://entrian.com/goto/index.html

Please ignore the line in bold red.

>Secondly, how do I clear screen (cls) from text and other content ?

Python clears after itself, so you don't need to.  If you insist though,

.>> import os
.>> os.system('cls')

That on a windows "console".

If on IDLE, try closing the window and reopening it.

>And last, how do I put program to wait certain amount of seconds ?
>If I remeber correctly I used to type "Wait 10" and QBasic waits 
>10 seconds before proceeding to next command.

(A serious answer for a change)  Waiting is time related.  So import time and
call the time.sleep function.

Try entering help at a Python prompt.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From pipedreamergrey at gmail.com  Tue Feb 22 15:46:19 2005
From: pipedreamergrey at gmail.com (PipedreamerGrey)
Date: 22 Feb 2005 12:46:19 -0800
Subject: PythonCard and Py2Exe
Message-ID: <1109105179.230092.202750@g14g2000cwa.googlegroups.com>

I'm trying to create a standalone version (.exe) of PythonCard's Custdb
sample using Py2Exe version 0.5.0.  Everytime I attempt to compile the
program, I get an error during compilation.  This is the exact code I'm
using in the setup file:


from distutils.core import setup
import py2exe
setup( name = "custdb",
       console = ["custdb.py"],
       data_files = [ (".", ["custdb.ini", "custdb.de.rsrc.py",
"custdb.rsrc.py", "customerdata.csv"]) ]
       )


This is the error message I get when I run custdb.exe:


Traceback (most recent call last):
  File "custdb.py", line 202, in ?
    app = model.Application(CustDbStack)
  File "PythonCard\model.pyc", line 337, in __init__
  File "PythonCard\resource.pyc", line 48, in getResource
  File "PythonCard\resource.pyc", line 86, in __init__
  File "PythonCard\resource.pyc", line 91, in __init__
  File "PythonCard\resource.pyc", line 91, in __init__
  File "PythonCard\resource.pyc", line 96, in __init__
  File "PythonCard\resource.pyc", line 139, in enforceSpec
  File "PythonCard\resource.pyc", line 30, in loadComponentModule
ImportError: cannot import module 'radiogroup


When I add "radiogroup" to the imports at the top of custdb.py, I get
this error message:


Traceback (most recent call last):
  File "custdb.py", line 18, in ?
ImportError: cannot import name radiogroup


This is line 18 in Custdb.py: from PythonCard import dialog, model,
radiogroup



From gmachlev at cisco.com  Sun Feb 13 08:44:53 2005
From: gmachlev at cisco.com (Guy Machlev (gmachlev))
Date: Sun, 13 Feb 2005 14:44:53 +0100
Subject: Probel with socket "recv" function on Win2000
Message-ID: <8C22373EA650AF40928EEA0C188D62D201810286@xmb-ams-338.emea.cisco.com>

Hi,
 
I have a problem with the socket recv() function while using it on
win-2000, the problem accrue while receiving data from socket in a
constant format (e.g. 1Byte then 4Bytes and then number of bytes
according to the previous 4Bytes number), this receiving action "fail"
after a bout ~120Kbytes of data the, actually the phenomena that accrue
after reading this amount of data is a kind of data skipping which mean
that the next recv is reading data start from ~121Kbytes I am losing
data between the 120 and 121, this phenomena is consistently happened
exactly at the same data point. I have tried to run the same script on
Linux and there it went perfect.
 
anyone has any idea way it happened ?
 
thanks
 
Guy. 
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From apardon at forel.vub.ac.be  Mon Feb  7 08:00:32 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 7 Feb 2005 13:00:32 GMT
Subject: variable declaration
References: <4202A022.3050209@netscape.net>
	<MSGID_2=3A5025=2F3.131_4204b0a9@fidonet.org>
	<mailman.1978.1107622451.22381.python-list@python.org>
Message-ID: <slrnd0epjg.26q.apardon@rcpc42.vub.ac.be>

Op 2005-02-05, Nick Coghlan schreef <ncoghlan at iinet.net.au>:

> [ ... ]
>
> With a rebinding operator, the intent of the last line can be made explicit:
>
> def collapse(iterable):
>      it = iter(iterable)
>      lastitem = it.next()
>      yield lastitem
>      for item in it:
>          if item != lastitem:
>              yield item
>              lastitem .= item
>
> (Note that doing this *will* slow the code down, though, since it has to check 
> for the existence of the name before rebinding it)

I think that most of the time it won't slow down the code as the
checking will have been done during the compilation phase. It
may even speed up code like this, because the compilation
phase will have established that it is a rebinding and so
code for testing whether a new variable is created or not
is not necessarry here.

-- 
Antoon Pardon


From knight at baldmt.com  Sun Feb 13 10:49:16 2005
From: knight at baldmt.com (knight at baldmt.com)
Date: 13 Feb 2005 07:49:16 -0800
Subject: SCons build tool speed
References: <SBsPd.4406$ZZ.3056@newssvr23.news.prodigy.net>
	<gOOdnTpZnaZCVJPfRVn-3w@powergate.ca>
Message-ID: <1108309756.236396.201830@o13g2000cwo.googlegroups.com>

Hi Peter--

> > How does the speed of the Scons build tool compare with
> > Ant? Right now with out Ant builds take around an hour. Hoping
> > to speed that up.
>
> Don't tools like Scons, Ant, and for that matter "make" just
> execute other programs?  So that 99% of the time is consumed
> external to the Scons, Ant, or make process itself?  Why
> do you think the speed of the build tool is of any significance
> compared to the time for things like compilers and linkers
> to execute?

You're right that build times are dominated by the external commands
when rebuilds occur.  If nothing needs to be rebuilt, though, the
wall-clock time is obviously dominated by how long it takes for
the build tool to decide that.  A build tool that doesn't decide
whether or not targets are up-to-date *and* dispatch the commnds
to rebuild them reasonably quickly and efficiently doesn't do a
good job of serving its users.

        --SK



From mefjr75 at hotmail.com  Thu Feb  3 23:39:45 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 3 Feb 2005 20:39:45 -0800
Subject: advice needed for simple python web app
In-Reply-To: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
Message-ID: <1107491985.187092.268580@o13g2000cwo.googlegroups.com>

I am no web expert but have recently used cherrypy to 'webify' a
script. It is very easy to get going and has its own server or can be
run behind Apache.
The only real problem I see is that the docs are still a little lite
for the new 2.0 series ,but they do have a newsgroup where the author
still answers questions.
Cherrypy2 is fairly logical and most of it is covered in the examples
on there website.
I can not speak for the other packages,have not used them yet ;)
hth,
M.E.Farmer



From jan.dries at dcube-resource.be  Fri Feb  4 18:50:34 2005
From: jan.dries at dcube-resource.be (Jan Dries)
Date: Sat, 05 Feb 2005 00:50:34 +0100
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
In-Reply-To: <ctv8r8$cks$1@sea.gmane.org>
References: <ctsjmg$75p$1@usenet.otenet.gr><pan.2005.02.03.19.10.39.349763@jerf.org>	<ueCMd.22177$Ck1.1629547@news20.bellglobal.com>
	<ctv8r8$cks$1@sea.gmane.org>
Message-ID: <42040A4A.7060403@dcube-resource.be>

Fredrik Lundh wrote:
> Markus Wankus wrote:
> 
>>Google his name - he has been banned from Netbeans and Eclipse (and Hibernate, and others...) for 
>>good reason.  Can you imagine how much of a Troll you need to be to *actually* get "banned" from 
>>the newsgroups of open source projects such as those?
> 
> have Pythoneers ever "banned" anyone from a public forum?  it's not like
> we haven't seen trolls and crackpots before, you know.

Well, we don't have to ban them because we have the PSU eliminate them 
alltogether. So much more efficient. Or do you think it's a coincidence 
we've never seen or heard Timothy "autocoding" Rue again?

Be afraid, Xah, be very afraid.

Regards,
Jan


From http  Wed Feb 16 09:37:09 2005
From: http (Paul Rubin)
Date: 16 Feb 2005 06:37:09 -0800
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<37h194F50j4pkU1@individual.net>
	<7xfyzwehq7.fsf@ruckus.brouhaha.com>
	<37h2keF5a2ijjU1@individual.net>
Message-ID: <7xwtt8a7vu.fsf@ruckus.brouhaha.com>

"Diez B. Roggisch" <deetsNOSPAM at web.de> writes:
> > I think it's way too heavyweight for what I'm envisioning, but I
> > haven't used it yet.  I'm less concerned about object persistence
> > (just saving strings is good enough) than finding the simplest
> > possible approach to dealing with concurrent update attempts.
> 
> And that's exactly where zodb comes into play. It has full ACID support.
> Opening a zodb is a matter of three lines of code - not to be compared to
> rdbms'ses. 

The issue with using an rdbms is not with the small amount of code
needed to connect to it and query it, but in the overhead of
installing the huge piece of software (the rdbms) itself, and keeping
the rdbms server running all the time so the infrequently used app can
connect to it.  ZODB is also a big piece of software to install.  Is
it at least 100% Python with no C modules required?  Does it need a
separate server process?  If it needs either C modules or a separate
server, it really can't be called a low-end strategy.


From aahz at pythoncraft.com  Sat Feb 12 19:13:17 2005
From: aahz at pythoncraft.com (Aahz)
Date: 12 Feb 2005 19:13:17 -0500
Subject: Kill GIL (was Re: multi threading in multi processor (computer))
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<1107964587.818199.223980@g14g2000cwa.googlegroups.com>
	<mailman.2254.1107966236.22381.python-list@python.org>
	<7xr7jlwieq.fsf@ruckus.brouhaha.com>
Message-ID: <cum62t$3fb$1@panix2.panix.com>

In article <7xr7jlwieq.fsf at ruckus.brouhaha.com>,
Paul Rubin  <http://phr.cx at NOSPAM.invalid> wrote:
>
>The day is coming when even cheap computers have multiple cpu's.
>See hyperthreading and the coming multi-core P4's, and the finally
>announced Cell processor.
>
>Conclusion: the GIL must die.

It's not clear to what extent these processors will perform well with
shared memory space.  One of the things I remember most about Bruce
Eckel's discussions of Java and threading is just how broken Java's
threading model is in certain respects when it comes to CPU caches
failing to maintain cache coherency.  It's always going to be true that
getting fully scaled performance will require more CPUs with non-shared
memory -- that's going to mean IPC with multiple processes instead of
threads.

Don't get me wrong -- I'm probably one of the bigger boosters of threads.
But it bugs me when people think that getting rid of the GIL will be the
Holy Grail of Python performance.  No way.  No how.  No time.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From jamesthiele.usenet at gmail.com  Thu Feb 24 13:57:58 2005
From: jamesthiele.usenet at gmail.com (jamesthiele.usenet at gmail.com)
Date: 24 Feb 2005 10:57:58 -0800
Subject: Mapping operator tokens to special methods
Message-ID: <1109271478.871224.272750@g14g2000cwa.googlegroups.com>

I was starting to write a dictionary to map operator strings to their
equivalent special methods such as:
{
  '+' : 'add',
  '&' : 'and_'
}

The idea is to build a simple interactive calculator.

and was wondering if there is already something like this builtin?

Or is there a better way to do what I want?



From bvande at po-box.mcgill.ca  Tue Feb  8 11:55:07 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Tue, 08 Feb 2005 11:55:07 -0500
Subject: variable declaration
In-Reply-To: <4208178F.40804@po-box.mcgill.ca>
References: <1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4207fd24@fidonet.org>
	<UmSNd.104914$Jk5.59261@lakeread01>
	<4208178F.40804@po-box.mcgill.ca>
Message-ID: <4208EEEB.3050207@po-box.mcgill.ca>

Brian van den Broek said unto the world upon 2005-02-07 20:36:
> Steve Holden said unto the world upon 2005-02-07 17:51:

<SNIP>

>> The reason global is a wart can clearly be seen in the following example:
>>
>>  >>> x = 3
>>  >>> def f(tf, v):
>>  ...   if tf:
>>  ...     global x
>>  ...   x = v
>>  ...
>>  >>> f(0, 5)
>>  >>> x
>> 5
>>  >>>

<SNIP>

> Hi,
> 
> Steve's example makes my brain hurt. :-)
> 
> I'd appreciate it if someone could tell me if I am understanding the 
> example correctly. (My grasp of the terminology and issues at play is a 
> bit shaky.)

<SNIP>

> Thanks for any confirmation of my understanding / rectification of same. 
> Best,
> 
> Brian vdB

Thanks to everyone whose contributed to this sub-thread! I've learned 
a lot. :-)

And, for posterity, some one wrote me off-list to correct my claim
that in

if False:
     # thousands of lines of code here

the thousands of lines "would never get executed". Simplifying their 
example, they pointed out:

 >>> False = 'evil trickery'
 >>> if False:
...     print 'Surprise!'
...
Surprise!
 >>>

Which leads me naturally to the differences between 'if False:' and 
'if ):' that Duncan Booth pointed to. (Where'd I put the Tylenol.)

Thanks again to all,

Brian vdB




From bvdeenen at xs-four-all.nl.invalid  Wed Feb 23 13:57:34 2005
From: bvdeenen at xs-four-all.nl.invalid (Bart van Deenen)
Date: Wed, 23 Feb 2005 19:57:34 +0100
Subject: Don't understand global variables between modules
References: <4219ba1f$0$162$e4fe514c@dreader14.news.xs4all.nl>
	<mailman.2903.1109020824.22381.python-list@python.org>
Message-ID: <1gsgcp8.rstw901izkwb0N%bvdeenen@xs-four-all.nl.invalid>

Hi

thanks for the answer. Coming from C and C++ this behaviour wasn't
really obvious to me. I still love Python though :-) Most elegant
language I've ever seen.

Bart


From noahspurrier at gmail.com  Tue Feb 22 18:59:52 2005
From: noahspurrier at gmail.com (Noah)
Date: 22 Feb 2005 15:59:52 -0800
Subject: Can I get message filename from a Maildir mailbox stream?
In-Reply-To: <ir4e11de0qvhtm585kt91uocd4gvf65d5r@4ax.com>
References: <1108778311.300124.56920@f14g2000cwb.googlegroups.com>
	<ir4e11de0qvhtm585kt91uocd4gvf65d5r@4ax.com>
Message-ID: <1109116792.529974.308840@f14g2000cwb.googlegroups.com>

This didn't work. I'm using the standard Python 2.3.4 library
mailbox.Maildir. I got an error that message instance
has no attribute 'fp'.

I ended up not using mailbox.Maildir at all.
It occured to me that since Maildir style mailboxes
is just a collection of files that it was simpler to write
a generator that walked the directory using os.listdir.

def Maildir_messages (path):
    d = os.listdir(path)
    for filename in d:
        fin = file (os.path.join(path, filename))
        yield (email.message_from_file(fin), filename)
        fin.close()

for msg, msg_filename in Maildir_messages ("/home/noah/Maildir/new"):
    print msg_filename
    print msg['Subject']

Yours,
Noah



From v451v at yahoo.com  Thu Feb  3 16:22:58 2005
From: v451v at yahoo.com (Jorl Shefner)
Date: Thu, 03 Feb 2005 16:22:58 -0500
Subject: Reinstall python 2.3 on OSX 10.3.5?
References: <mailman.1792.1107403740.22381.python-list@python.org>
	<ctsl83$s1q$1@news1.ucsd.edu>
Message-ID: <36fj01F508ugpU1@individual.net>

In article <ctsl83$s1q$1 at news1.ucsd.edu>, Robert Kern <rkern at ucsd.edu> 
wrote:

> Christian Dieterich wrote:
> > On D? C?adaoin, Feabh 2, 2005, at 17:48 America/Chicago, 
> > moa at extrapolation.com wrote:
> > 
> >> Hi there
> >>
> >> I started a very long and roundabout process of attempting to install
> >> python 2.3.4 along side my apple-installed 2.3 system. To make a long
> >> story short, I have completely confabulated my environment ( i deleted
> >> the 2.3 binaries and so forth from the system in an attempt to start
> >> things fresh), and now I cannot figure out how to reinstall the base
> >> 2.3 Apple python distribution.
> >> Can somebody please point me in the right direction?
> > 
> > 
> > You could use
> > fink install python
> > which makes you a Python installation under /sw.
> 
> But that doesn't solve his problem, which is to restore the 
> Apple-supplied Python that he deleted.

 I use a version of 2.3.4 on my Os X system that I installed myself 
without any apparent loss of functionality.  What extra advantages is 
the Apple installed version supposed to provide? 

J.S.


From quentel.pierre at wanadoo.fr  Fri Feb 18 01:32:17 2005
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Fri, 18 Feb 2005 07:32:17 +0100
Subject: low-end persistence strategies?
In-Reply-To: <7xr7jezxlh.fsf@ruckus.brouhaha.com>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<4214f9ba$0$832$8fcfb975@news.wanadoo.fr>
	<mailman.2774.1108674135.22381.python-list@python.org>
	<7xr7jezxlh.fsf@ruckus.brouhaha.com>
Message-ID: <42158bf1$0$6624$8fcfb975@news.wanadoo.fr>

If a dozen people click the url in the next day, several of
> them will probably in the first minute or so after the email goes out.
> So two simultaneous clicks isn't implausible.

> More generally, I don't like writing code with bugs even if the bugs
> have fairly low chance of causing trouble.  So I'm looking for the
> easiest way to do this kind of thing without bugs.

Even if the 12 requests occur in the same 5 minutes, the time needed for 
a read or write operation on a small base of any kind (flat file, dbm, 
shelve, etc) is so small that the probability of concurrence is very 
close to zero

If you still want to avoid it, you'll have to pay some price. The most 
simple and portable is a client/server mode, as suggested for KirbyBase 
for instance. Yes, you have to run the server 24 hours a day, but you're 
already running the web server 24/7 anyway


From francis.girard at free.fr  Sun Feb 13 13:58:27 2005
From: francis.girard at free.fr (Francis Girard)
Date: Sun, 13 Feb 2005 19:58:27 +0100
Subject: Iterator / Iteratable confusion
In-Reply-To: <200502131848.03655.francis.girard@free.fr>
References: <420a5c1e$0$21630$a1866201@visi.com>
	<slrnd0q67t.52v.curty@einstein.electron.net>
	<200502131848.03655.francis.girard@free.fr>
Message-ID: <200502131958.27410.francis.girard@free.fr>

Hi,

I wrote simple dummy examples to teach to myself iterators and generators.

I think that the iteration protocol brings a very neat confusion between the 
iterator and what it iterates upon (i.e. the iteratable). This is outlined in 
"example 3" in my dummy examples.

What are your feelings about it ? 

Regards

Francis Girard

==== BEGINNING OF EXAMPLES ====

from itertools import tee, imap, izip, islice
import sys
import traceback

sEx1Doc = \
"""
================================================================================
Example 1:
================================================================================

An ""iteratable"" class is a class supporting the __iter__ method which should
return an ""iterator"" instance, that is, an instance of a class supporting
the "next" method. 

An iteratable, strictly speaking, doesn't have to support the "next" method 
and 
an "iterator" doesn't have to support the "__iter__" method (but this breaks 
the
iteration protocol as we will later see).

The ""for ... in ..."" construct now expect an iteratable instance in its 
second argument place. It first invoke its __iter__ method and then repeatedly
invoke the ""next"" method on the object returned by ""__iter__"" until the
""StopIteration"" exception is raised.

The designing goal is to cleanly separate a container class with the way we
iterate over its internal elements.
"""
class Ex1_IteratableContClass:
  def __init__(self):
    print "Ex1_IteratableContClass.__init__"
    self._vn = range(0,10)
    
  def elAt(self, nIdx):
    print "Ex1_IteratableContClass.elAt"
    return self._vn[nIdx]
    
  def __iter__(self):
    print "Ex1_IteratableContClass.__iter__"
    return Ex1_IteratorContClass(self)

class Ex1_IteratorContClass:
  def __init__(self, cont):
    print "Ex1_IteratorContClass.__init__"
    self._cont = cont
    self._nIdx = -1
    
  def next(self):
    print "Ex1_IteratorContClass.next"
    self._nIdx += 1
    try:
      return self._cont.elAt(self._nIdx)
    except IndexError:
      raise StopIteration

print
print sEx1Doc
print
for n in Ex1_IteratableContClass():
  print n,
  sys.stdout.flush()
  

sEx2Doc = \
"""
================================================================================
Example 2:
================================================================================

Let's say that we want to give two ways to iterate over the elements of our 
example container class. The default way is to iterate in direct order and we
want to add the possibility to iterate in reverse order. We simply add another
""iterator"" class. We do not want to modify the container class as, 
precisely,
the goal is to decouple the container from iteration.
"""
class Ex2_IteratableContClass:
  def __init__(self):
    print "Ex2_IteratableContClass.__init__"
    self._vn = range(0,10)
    
  def elAt(self, nIdx):
    print "Ex2_IteratableContClass.elAt"
    return self._vn[nIdx]
    
  def __iter__(self):
    print "Ex2_IteratableContClass.__iter__"
    return Ex1_IteratorContClass(self)

class Ex2_RevIteratorContClass:
  def __init__(self, cont):
    print "Ex2_RevIteratorContClass.__init__"
    self._cont = cont
    self._nIdx = 0
    
  def next(self):
    print "Ex2_RevIteratorContClass.next"
    self._nIdx -= 1
    try:
      return self._cont.elAt(self._nIdx)
    except IndexError:
      raise StopIteration

print
print sEx2Doc
print
print "Default iteration works as before"
print
for n in Ex2_IteratableContClass():
  print n,
  sys.stdout.flush()

print
print "But reverse iterator fails with an error : "
print

cont = Ex2_IteratableContClass()
try:
  for n in Ex2_RevIteratorContClass(cont):
    print n,
    sys.stdout.flush()
except:
  traceback.print_exc()

sEx3Doc = \
"""
================================================================================
Example 3.
================================================================================

The previous example fails with the "iteration over non sequence" error 
because
the "Ex2_RevIteratorContClass" iterator class doesn't support the __iter__
method. We therefore have to supply one, even at the price of only returning
""self"".

I think this is ugly because it baffles the distinction between iterators and
iteratables and we artificially have to add an ""__iter__"" method to the 
iterator itself, which should return ... well, an iterator, which it already 
is !

I presume that the rationale behind this is to keep the feature that the 
second
argument place of the ""for ... in ..."" should be filled by a container (i.e.
an iteratable), not an iterator.

Another way that Python might have done this without breaking existing code is 
to make the ""for ... in ..."" construct invoke the __iter__ method if it 
exists, otherwise, directly call the ""next"" method on the supplied object.

But this is only a minor quirk as the decoupling of the iterator from the 
iteratable is nonetheless achieved at the (small) price of adding an "almost"
useless method.

So here it is.
"""

class Ex3_RevIteratorContClass:
  def __init__(self, cont):
    print "Ex3_RevIteratorContClass.__init__"
    self._cont = cont
    self._nIdx = 0
    
  def __iter__(self):
    print "Ex3_RevIteratorContClass.__iter__"
    return self ## zut !
    
  def next(self):
    print "Ex3_RevIteratorContClass.next"
    self._nIdx -= 1
    try:
      return self._cont.elAt(self._nIdx)
    except IndexError:
      raise StopIteration

print
print sEx3Doc
print
cont = Ex2_IteratableContClass()
for n in Ex3_RevIteratorContClass(cont):
  print n,
  sys.stdout.flush()

sEx4Doc = \
"""
================================================================================
Example 4.
================================================================================

Since version 2.2, a new built-in function is offered that simply takes an 
iteratable as argument and returns an iterator by calling its "__iter__". As
long as only iteratables/iterators are involved, this is no big deal as
""iter(anIteratable)"" is strictly equivalent to ""anIteratable.__iter__()"".

The real advantage in using this function is that is also accepts containers
supporting the sequence protocol (the __getitem__() method with integer 
arguments starting at 0). The ""iter"" methods also returns an iterator for 
this
case. We can therefore write a function accepting a container as argument 
that,
with the same code, can either support the iteration protocol or the sequence
protocol.
"""

class Ex4_IteratableContClass:
  def __init__(self):
    print "Ex4_IteratableContClass.__init__"
    self._vn = range(0,10)
    
  def elAt(self, nIdx):
    print "Ex4_IteratableContClass.elAt"
    return self._vn[nIdx]
    
  def __iter__(self):
    print "Ex4_IteratableContClass.__iter__"
    return Ex4_IteratorContClass(self)

class Ex4_IteratorContClass:
  def __init__(self, cont):
    print "Ex4_IteratorContClass.__init__"
    self._cont = cont
    self._nIdx = -1
    
  def __iter__(self):
    print "Ex4_RevIteratorContClass.__iter__"
    return self ## zut !
    
  def next(self):
    print "Ex4_IteratorContClass.next"
    self._nIdx += 1
    try:
      return self._cont.elAt(self._nIdx)
    except IndexError:
      raise StopIteration

class Ex4_SequenceContClass:
  def __init__(self):
    print "Ex4_SequenceContClass.__init__"
    self._vn = range(0,10)
    
  def elAt(self, nIdx):
    print "Ex4_SequenceContClass.elAt"
    return self._vn[nIdx]
    
  def __getitem__(self, key):
    print "Ex4_IteratableContClass.__getitem__"
    return self.elAt(key)

def Ex4_FuncPrintContainerEl(cont):
  for n in iter(cont):
    print n,
    sys.stdout.flush()

print
print sEx4Doc
print
print
print "Applying Ex4_FuncPrintContainerEl to an iteratable container"
print
Ex4_FuncPrintContainerEl(Ex4_IteratableContClass())

print
print "Applying Ex4_FuncPrintContainerEl to a sequence container"
print
Ex4_FuncPrintContainerEl(Ex4_SequenceContClass())


sEx5Doc = \
"""
================================================================================
Example 5. 
================================================================================

Introducing Generators

The "generator" term itself is frequently used with two different meanings.
It is sometimes used to mean "generator function" and sometimes to mean
"generator-iterator". The PEP255 and python mailing list are the two only 
places
where I could read something that clearly distinguishes the two notions.

A generator-function can be first seen as only a notational artefact to 
generate
an iterator. The generated iterator is called a generator-iterator and it is,
by its intimate nature, both an iterator and an iteratable. (This might very
well be another reason why the iteration protocol baffles the distinction
betweeen iterators and iteratables.) Typically (but not necessarily), the
generator-iterator is such that the elements do not pre-exist but are 
"generated" as needed while iteration is going on.

Here is an example of a generator-function and the equivalent iterator class.
The function ""Ex5_GenList"" can be seen as just a notational shortcut to the 
equivalent Ex5_GenListIteratorClass class.
"""

def Ex5_GenList():
  print "Enters Ex5_GenList"
  i = 0
  while i < 10:
    print "Ex5_GenList yields -- Equivalent to have a it.next() return"
    yield i
    i += 1
  print "Ex5_GenList exits, equivalent to : raise StopIteration"
    
class Ex5_GenListIteratorClass:
  
  def __init__(self):
    print "Ex5_GenListIteratorClass.__init__"
    self._i = 0
    
  def __iter__(self):
    print "Ex5_GenListIteratorClass.__iter__"
    return self

  def next(self):
    print "Ex5_GenListIteratorClass.next"
    nReturn = self._i
    if nReturn > 9:
      print "Ex5_GenListIteratorClass.next raises the StopIteration exception"
      raise StopIteration
    self._i += 1
    return nReturn
    
print
print sEx5Doc
print
print "The type of Ex5_GenList() is : %s" % type(Ex5_GenList())
print "Although it is really meant generator-iterator"
print "As you can see, calling Ex5_GenList() didn't enter the function since 
our"
print "trace \"Enters Ex5_GenList\" had not been printed."
print "It only produced the generator-iterator."
print
print "for n in Ex5_GenList(): gives:"
print
for n in Ex5_GenList():
  print n,
  sys.stdout.flush()

print
print "The type of Ex5_GenList is : %s" % type(Ex5_GenList)
print "Although it is really meant generator-function"
print
print "for n in Ex5_GenList: gives:"
print
try:
  for n in Ex5_GenList:
    print n,
    sys.stdout.flush()
except:
  traceback.print_exc()

print
print "The type of Ex5_GenList().__iter__() is : %s" % 
type(Ex5_GenList().__iter__())
print
print "for n in Ex5_GenList().__iter__(): gives:"
print
for n in Ex5_GenList().__iter__():
  print n,
  sys.stdout.flush()

print
print "it = Ex5_GenList()"
print "for n in it(): gives:"
print
it = Ex5_GenList()
try:
  for n in it():
    print n,
    sys.stdout.flush()
except:
  traceback.print_exc()
print "The iterator produced by Ex5_GenList() is obviously not itself 
callable"

print
print "for n in Ex5_GenListIteratorClass(): gives:"
print
for n in Ex5_GenListIteratorClass():
  print n,
  sys.stdout.flush()

sEx6Doc = \
"""
================================================================================
Example 6
================================================================================

After having distinguished iteratable from iterator and generator-function 
from
generator-iterator, and having seen how generator-iterator makes iterable and
iterator undistinguishables, we are now ready for some real work. There is now
a real vocabulary problem in the Python community but I think that it is now
clear enough.

Our first pseudo-real-world example is to produce the Fibonacci sequence using
a simple generator.

The Ex6_Fibonacci() is a bit special as it never stops. This is one way to
implement something similar to infinite lists in python.
"""
def Ex6_Fibonacci():
  a = 1
  b = 1
  yield a
  yield b
  while True:
    bb = a + b
    a = b
    b = bb
    yield bb

print
print sEx6Doc
print
it = Ex6_Fibonacci()
for i in xrange(0,10):
  print it.next()

sEx7Doc = \
"""
================================================================================
Example 7
================================================================================
A beautiful algorithm to produce the fibonacci sequence goes by noticing 
that :
  
fib(i) =          1, 1, 2, 3, 5,  8,  13, 21, 34, 55,  89,  144, 233, 377, ...
fib(i+1) =        1, 2, 3, 5, 8,  13, 21, 34, 55, 89,  144, 233, 377, ...
fib(i)+fib(i+1) = 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, ...

Generators now enable us to ""run after our tail"". We will exploit the 
Fibonacci sequence property shown above by defining a function that produces
and returns a "list" while the production algorithm supposes the list as 
having
been already produced by recursively calling itself. In order to be able to do
this, we need to initiate the processus by explicitly giving the first values.
We also need that the list must be produced "lazily" ; i.e. the values must be 
produced only as needed ... well needed to produce the next element in the 
""list"" in our case.

Here is a first try that will almost work.
"""

## Without the traces:
##
## def Ex7_Fibonacci():
##   yield 1
##   yield 1
##   itTail = Ex7_Fibonacci()
##   itTail.next() # Skip the first one
##   for n in (head + tail for (head, tail) in izip(Ex7_Fibonacci(), itTail)):
##     yield n

N_STACK_DEPTH = 0
def Ex7_Fibonacci():
  global N_STACK_DEPTH
  N_STACK_DEPTH += 1
  nStackDepth = N_STACK_DEPTH
  
  print "[%d] Entering Ex7_Fibonacci" % nStackDepth
  print "[%d] Yielding 1" % nStackDepth
  yield 1
  print "[%d] Yielding 1" % nStackDepth
  yield 1
  itTail = Ex7_Fibonacci()
  itTail.next() # Skip the first one
  for n in (head + tail for (head, tail) in izip(Ex7_Fibonacci(), itTail)):
    print "[%d] Yielding %d" % (nStackDepth, n)
    yield n

print
print sEx7Doc
print
print list(islice(Ex7_Fibonacci(), 5))


sEx8Doc = \
"""
================================================================================
Example 8
================================================================================
Running after your tail with itertools.tee

Example 7 shows that although the idea is beautiful, the implementation is
very inefficient. 

To work efficiently, the beginning of the list must not be recomputed over
and over again. This is ensured in most FP languages as a built-in feature.
In python, we have to explicitly maintain a list of already computed results
and abandon genuine recursivity.

The "tee" function does just what we want. It internally keeps a generated
result for as long as it has not been "consumed" from all of the duplicated
iterators, whereupon it is deleted. You can therefore print the Fibonacci
sequence during hours without increasing memory usage, or very little.

The beauty of it is that recursive running after their tail FP algorithms
are quite straightforwardly expressed with this Python idiom.
"""

def Ex8_Fibonacci():
  print "Entering Ex8_Fibonacci"
  def _Ex8_Fibonacci():
    print "Entering _Ex8_Fibonacci"
    yield 1
    yield 1
    fibTail.next() # Skip the first one
    for n in (head + tail for (head, tail) in izip(fibHead, fibTail)):
      yield n
  fibHead, fibTail, fibRes = tee(_Ex8_Fibonacci(), 3)
  return fibRes
  
print
print sEx8Doc
print
print list(islice(Ex8_Fibonacci(), 5))



From apardon at forel.vub.ac.be  Mon Feb 21 07:41:20 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 21 Feb 2005 12:41:20 GMT
Subject: lambda closure question
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
	<slrnd1jjo4.jkb.apardon@rcpc42.vub.ac.be>
	<mailman.2891.1108988864.22381.python-list@python.org>
Message-ID: <slrnd1jlne.jkb.apardon@rcpc42.vub.ac.be>

Op 2005-02-21, jfj schreef <jfj at freemail.gr>:
> Antoon Pardon wrote:
>> Op 2005-02-19, jfj schreef <jfj at freemail.gr>:
>> 
>>>once foo() returns there is no way to modify 'x'!
>>>It becomes a kind of constant.
>> 
>> 
>> In this particular case yes. But not in general, what about
>> this:
>> 
>> 
>>>>>def F():
>> 
>> ...   l = []
>> ...   def pop():
>> ...     return l.pop()
>> ...   def push(e):
>> ...     l.append(e)
>> ...   return pop, push
>> ... 
>> 
>
> Others will point this out, but if I'm fast enough...
>
> This does not change the object referenced by l.
> It calls methods of it and because it is mutable the containts
> of the list are modified.
> 'l' is a list at address, 0xXXXX and that can never change once
> F() has returned.

I'm sorry but in my understanding of english mutating an object
is changing or modifying it. Yes it is stil the same list but
that list was not unmodified.

But I'll get back at what seems you actually wanted to say:
That there is no way to rebind 'x' or in my case 'l' and
with that I have to agree although I personnaly find that
a lack in python

-- 
Antoon Pardon


From mefjr75 at hotmail.com  Mon Feb  7 00:10:30 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 6 Feb 2005 21:10:30 -0800
Subject: pygame.mixer.music not playing
In-Reply-To: <36o9dvF53a94mU1@individual.net>
References: <36mb0iF54udklU1@individual.net>
	<1107700800.258876.298010@z14g2000cwz.googlegroups.com>
	<36mvjkF54gvnrU1@individual.net>
	<1107748705.808825.319270@f14g2000cwb.googlegroups.com>
	<36o9dvF53a94mU1@individual.net>
Message-ID: <1107753030.904833.179800@z14g2000cwz.googlegroups.com>

Just curious what is not suitable about FMOD ?
It seems to be exactly what you are looking for.
Cross platform, free, great sound, python bindings, no compiler needed.
M.E.Farmer



From alec at thened.net  Thu Feb 10 12:47:24 2005
From: alec at thened.net (Alec Berryman)
Date: Thu, 10 Feb 2005 12:47:24 -0500
Subject: [N00B] What's %?
In-Reply-To: <614c778e.0502100938.6665cb52@posting.google.com>
References: <614c778e.0502100938.6665cb52@posting.google.com>
Message-ID: <20050210174724.GC3416@thened.net>

administrata on 2005-02-10 09:38:41 -0800:

> Hi! it's been about a week learning python!
> I've read 'python programming for the absolute begginer'
> I don't understand about % like...
> 
> 107 % 4 = 3
> 7 % 3 = 1
> 
> I'm confused with division :/

It's not division; the division operator is '/'.  It's the mod
function, which returns the remainder - for example, 7 divided by 3 is
2 remainder 1, so 7 % 3 returns 1.
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From vze4rx4y at verizon.net  Sat Feb 12 19:15:39 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Sun, 13 Feb 2005 00:15:39 GMT
Subject: [PATCH] Re: frozenset() without arguments should return a
	singleton
References: <001701c51145$410e50c0$deae958d@oemcomputer>
	<culvhv$fgv$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <L_wPd.19688$ya6.18125@trndny01>

> > It is not quite correct to say that this is what all immutables do:
> >
> >.>>>x = 500
> >.>>>y = 600 - 100
> >.>>>x is y
> > False
>
> I know. The same is true for concateneted strings, etc. But whenever an
> immutable object is created directly ('by hand'), it holds. It also holds,
> btw, for tuple() - as opposed to ().

That is an implementation detail, not guaranteed by the language (i.e. not
necessarily true in future versions, in Jython, or other implementations).  It
is just an optimization that made sense for tuples but not necessarily for other
immutables.



> I actually use frozensets whenever I know that my set is going to be immutable
> (I thought that was what they were meant for).

That is a reasonable use.  I like it because it is explicit about your intent.

Guido, on the other hand, would probably object because it is akin to saying
that () should be passed for an empty list in situations where the list is
expected not to mutate.



> And similar to the usage of tuples as replacements for empty lists, I
> definitely pass a frozenset whenever I need a dummy set-like object.
> If I know that frozenset() is not constant, I may end up with keeping a dummy
> reference around somewhere that is passed instead of a 'new' frozenset().

That solution is reasonable and portable:

emptyset = frozenset()
f('abc', emptyset)
g('def', emtpyset)
h(1, 2, emtpyset, True)
 . . .

I also find it be more readable than:

f('abc', frozenset())
g('def', frozenset())
h(1, 2, emtpyset, frozenset())

FWIW, the latter form entails three failed lookups into the local scope and
three successful lookups in the __builtin__ scope.  Since the former can store
emptyset as a local variable, it can be accessed with no lookups at all.  Also,
the latter forms incur extra trips around the eval-loop and call-function
overhead.

IOW, yoursavings = time_to_allocate_an_emtpy_set - builtin_lookup_time -
eval_loop_and_call_overhead - extra_time_building_non_emtpy_sets.  I suspect the
net savings to be near zilch.




> Also, I don't know what else needs to be changed and what a difference that
> makes. But if the added code is reasonably limited, I'd vote for it.

Will think about it for a while.  I'm not terribly opposed to the idea.  I just
find the case for it to be somewhat weak.  Also, I'm not sure it warrants the
effort, the code clutter, or introducing issues like having a semantic
difference between the result of frozenset() and the result of frozenset([]).




Raymond Hettinger




From PDunce at somewhere.invalid  Mon Feb  7 02:22:35 2005
From: PDunce at somewhere.invalid (Python Dunce)
Date: 07 Feb 2005 07:22:35 GMT
Subject: Dumb glob question
Message-ID: <Xns95F6E0341861PDuncesomewhereinval@204.153.244.156>

I've run into an issue with glob and matching filenames with brackets '[]' 
in them.  The problem comes when I'm using part of such a filename as the 
path I'm passing to glob.  Here's a trimmed down dumb example.  Let's say I 
have a directory with the following files in it.

foo.par2
foo.vol0+1.par2
foo.vol1+1.par2
zzz [foo].par2
zzz [foo].vol0+1.par2
zzz [foo].vol1+1.par2

While processing one of the files I want to do certain things in batch so 
I've been using glob as a means to get all of the files in a set.  The 
following code will print the filenames for parity volumes in each set 
while working with the base checksum, unless there are brackets in the 
name.


#re2 = re.compile(r'vol', re.IGNORECASE)

#for nuke in glob.glob('*.par2'):
#    if not re2.search(nuke):
#        list = glob.glob(nuke[:-5]+'*vol*')
#        for name in list: print os.path.join(os.getcwd(),name)



I'm sure there is something obvious I'm missing.  I figured I could use 
something like re.escape on the trimmed filename for matching but that 
hasn't worked either.  Using win32api.FindFiles instead of glob works but 
I'd obviously rather do it the _right_ way and have it work properly in 
*nix too.


From Serge.Orlov at gmail.com  Thu Feb 10 11:47:29 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: 10 Feb 2005 08:47:29 -0800
Subject: sre is broken in SuSE 9.2
References: <mailman.2299.1108029731.22381.python-list@python.org>
	<1108036791.098550.306310@g14g2000cwa.googlegroups.com>
	<mailman.2316.1108046679.22381.python-list@python.org>
Message-ID: <1108054048.998825.64300@o13g2000cwo.googlegroups.com>

Denis S. Otkidach wrote:
> On 10 Feb 2005 03:59:51 -0800
> "Serge Orlov" <Serge.Orlov at gmail.com> wrote:
>
> > > On all platfroms \w matches all unicode letters when used with
flag
> > > re.UNICODE, but this doesn't work on SuSE 9.2:
> [...]
> > I can get the same results on RedHat's python 2.2.3 if I pass re.L
> > option, it looks like this option is implicitly set in Suse.
>
> Looks like you are right:
>
> >>> import re
> >>> re.compile(ur'\w+', re.U).match(u'\xe4')
> >>> from locale import *
> >>> setlocale(LC_ALL, 'de_DE')
> 'de_DE'
> >>> re.compile(ur'\w+', re.U).match(u'\xe4')
> <_sre.SRE_Match object at 0x40375560>
>
> But I see nothing related to implicit re.L option in their patches
> and the sources themselves are the same as on other platforms.  I'd
> prefer to find the source of problem.

I found that

print u'\xc4'.isalpha()
import locale
print locale.getlocale()

produces different results on Suse (python 2.3.3)

False
(None, None)


and RedHat (python 2.2.3)

1
(None, None)

  Serge.



From gabriel.barros at gmail.com  Tue Feb  8 20:12:13 2005
From: gabriel.barros at gmail.com (Gabriel B.)
Date: Tue, 8 Feb 2005 23:12:13 -0200
Subject: tcl/tk naming scheme vs python's
Message-ID: <5175a81c0502081712437d3fb0@mail.gmail.com>

I got my self writting nested objects to hold Tk references, then i
realizes that i was working in python and not tcl, so i switched to
flat vars... and in no time i was using more then 7 words separated by
captalization in the names... i was able to rethink my scheme to use
5... no less.

i'm i exagerating or do you people also comes to this some times?
The other choice i think i had was to use semantic names instead of
semantic and hierarchical ones.

Gabriel

PS: i resisted the force of make an example using
ButtonSpamSpamSpamSpamSpamEggsSpam


From steven.bethard at gmail.com  Mon Feb 21 13:44:36 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 21 Feb 2005 11:44:36 -0700
Subject: combining several lambda equations
In-Reply-To: <slrnd1jiib.jkb.apardon@rcpc42.vub.ac.be>
References: <2ae25c6b.0502180224.3d6164a7@posting.google.com>
	<ALqdnSMoh__WuIvfRVn-vA@comcast.com>
	<slrnd1jiib.jkb.apardon@rcpc42.vub.ac.be>
Message-ID: <Sc-dnXPwVtSSsYffRVn-tA@comcast.com>

Antoon Pardon wrote:
> So and if I have code like this:
> 
> f = lamda x:x 
> for g in some_iter:
>   f = compose(g,f)
> 
> Do you still think that one should use a named function in this case?

Yes.  If you really don't like taking two lines, Python still allows you 
to write this as:

     def f(x): return x
     for g in some_iter:
         f = compose(g, f)

On the other hand, if you really love FP enough to write this kind of 
code, shouldn't you be using reduce istead? ;)  I'm horrible with 
reduce, but something like:

     def identity(x):
         return x
     f = reduce(compose, some_iter, identity)

or if you want to use lambda (note that my complaint about making an 
named function with the anonymous function syntax doesn't apply here):

     f = reduce(compose, some_iter, lambda x: x)

Not sure if the order of composition is right here, but you get the idea.

STeVe


From xah at xahlee.org  Tue Feb 15 07:59:30 2005
From: xah at xahlee.org (Xah Lee)
Date: 15 Feb 2005 04:59:30 -0800
Subject: problem: reducing comparison
In-Reply-To: <1108471704.220626.27530@g14g2000cwa.googlegroups.com>
References: <1108450348.253772.158120@z14g2000cwz.googlegroups.com>
	<1108471704.220626.27530@g14g2000cwa.googlegroups.com>
Message-ID: <1108472370.722794.85170@z14g2000cwz.googlegroups.com>

my Python coding is not experienced. In this case, is
ps.pop("%d,%d"%(j[1],k[1]),0) out of ordinary?

if i have long paragraphs of documentation for a function, do i still
just attach it below the fun def?

 Xah

Xah Lee wrote:
> here are the answers:
>
> ?Python code.
> ?
> ?def reduce(pairings, pair):
> ?    ps=pairings.copy(); j=pair;
> ?    ps.pop("%d,%d"%(j[0],j[1]),0)
> ?    for k in pairings.itervalues():
> ?        if (k[0]==j[0]):
> ?            if (j[1] < k[1]):
> ?                ps.pop("%d,%d"%(j[1],k[1]),0)
> ?            else:
> ?                ps.pop("%d,%d"%(k[1],j[1]),0)
> ?        if (k[1]==j[0]):
> ?            if (k[0] < j[1]):
> ?                ps.pop("%d,%d"%(k[0],j[1]),0)
> ?            else:
> ?                ps.pop("%d,%d"%(j[1],k[0]),0)
> ?    return ps
> ?
>
> In imperative languages such as Perl and Python and Java, in general
it
> is not safe to delete elements when looping thru a list-like entity.
> (it screws up the iteration) One must make a copy first, and work
with
> the copy.
>
> Note also that in Python there's already a function called reduce.
(it
> is equivalent to Mathematica's Fold.) In Python, looks like user can
> over-ride default functions.
>
> This post is archived at
> http://xahlee.org/perl-python/pairing_reduce.html
> Possible errata or addenda will appear there.
> 
>  Xah
>  xah at xahlee.org
>  http://xahlee.org/PageTwo_dir/more.html



From M.Waack at gmx.de  Tue Feb 15 11:58:00 2005
From: M.Waack at gmx.de (Mathias Waack)
Date: Tue, 15 Feb 2005 17:58:00 +0100
Subject: 64 bit Python
References: <1cd7e2-qu7.ln1@valpo.de> <cur339$c5q$1@bagan.srce.hr>
	<pjh7e2-8a8.ln1@valpo.de>
	<mailman.2576.1108418509.22381.python-list@python.org>
Message-ID: <o9m9e2-b97.ln1@valpo.de>

Mike C. Fletcher wrote:

> Mathias Waack wrote:
> ...
> 
>>My python script allocates a bunch of strings each of 1024
>>characters and writes it in a cStringIO. And it fails after writing
>>512K of strings. Don't know how python restricts the heap size -
>>but I'm fairly sure its not a restriction of the OS.
>>  
>>
> Does cStringIO require contiguous blocks of memory?  I'm wondering
> if maybe there's something going on where you just can't allocate
> more than
> a GB of contiguous space?  

That was the problem. I've used cStringIO to reduce the overhead by
the python memory management. But now I know - that was a bad idea
in this case. 

> What happens if you just store the 
> strings in
> a list (or use StringIO instead of cStringIO)?  

It consumed 10 GB really fast, another GB really slow, some hundred
MB much slower and then it died;)

Mathias


From tom at dtsam.com  Tue Feb  1 13:04:29 2005
From: tom at dtsam.com (Thomas Bartkus)
Date: Tue, 1 Feb 2005 12:04:29 -0600
Subject: The next Xah-lee post contest
References: <mailman.1568.1107005758.22381.python-list@python.org>
	<ctg6qn$q63$1@solaris.cc.vt.edu>
	<mailman.1572.1107009638.22381.python-list@python.org>
	<e9lpv0tk63k0v7v1lctt0d77f92ub48bl3@4ax.com>
	<20050130114008.797088857.whereU@now.com>
	<mailman.1602.1107115028.22381.python-list@python.org>
	<1107137465.973491.42050@f14g2000cwb.googlegroups.com>
	<fMpLd.101045$Jk5.4448@lakeread01>
	<sqasv0petsjfr0qb9u7e1i30n8mrjl3t78@4ax.com>
	<Q7ednbtYIue5LWLcRVn-2Q@powergate.ca>
	<1107277633.959477.302860@f14g2000cwb.googlegroups.com>
Message-ID: <qJKdnUVxZ_kfWWLcRVn-gw@telcove.net>

"Luis M. Gonzalez" <luismgz at gmail.com> wrote in message
news:1107277633.959477.302860 at f14g2000cwb.googlegroups.com...
>
> Have you visited his website?
> I kind of like this guy... it's like he has a few bugs in his brain,
> but other parts are surprisingly interesting.

I kind of like him too. I hope he manages to find a babe!

As human conditions go, normalcy is *highly* overrated..
Thomas Bartkus




From bill.mill at gmail.com  Fri Feb 11 14:31:35 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Fri, 11 Feb 2005 14:31:35 -0500
Subject: check if object is number
In-Reply-To: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
Message-ID: <797fe3d40502111131bbd7f38@mail.gmail.com>

On Fri, 11 Feb 2005 12:11:44 -0700, Steven Bethard
<steven.bethard at gmail.com> wrote:
> Is there a good way to determine if an object is a numeric type?
> Generally, I avoid type-checks in favor of try/except blocks, but I'm
> not sure what to do in this case:
> 
>      def f(i):
>          ...
>          if x < i:
>              ...
> 
> The problem is, no error will be thrown if 'i' is, say, a string:
> 
> py> 1 < 'a'
> True
> py> 10000000000 < 'a'
> True
> 
> But for my code, passing a string is bad, so I'd like to provide an
> appropriate error.

How about:
if type(variable) == type(1):
    print "is an integer"
else:
    print "please input an integer" 

> 
> I thought about calling int() on the value, but this will also allow
> some strings (e.g. '1').  I guess this isn't horrible, but it seems
> somewhat suboptimal...
> 
> Ideas?
> 
> Steve
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From michael.bierenfeld at web.de  Tue Feb 22 05:06:52 2005
From: michael.bierenfeld at web.de (michael)
Date: 22 Feb 2005 02:06:52 -0800
Subject: Memory Based File Objects
Message-ID: <f11c8440.0502220206.56d908ce@posting.google.com>

Hi there,

I am using the Python Image package to do some Image conversion. I
have a "pgm" Image and this must be converted to a "1" Bits / Sample
Tiff Image. There for I am using Image.save ("lala.tiff"). *hm* A Tiff
Image opt. consists of several pages so I am thinking about using the
pytiff package as well. The existing code is like that

parser = ImageFile.Parser ()
parser.feed (imagecontent)
image = parser.close ()            # Now we have the Image

image = image.convert ("1")        # reduce to 1 Bits per sample
image.save ("lala.tif")            # Store as Tiff

After everey File has been processed I am using the "tiffcp" command
to append all the files to a single tiff-file containing each image as
a separate page.

eg. "tiffcp fileone.tiff filetwo.tiff filethree.tiff allinone.tiff"

Performance is an issue here and therefore I am evaluating the pytiff
package. Cause this package can reduce to "1" Bits per Sample and
append to tifffiles.

So the code would be like this

image.save (fileobject, format="tif")
tifffile = pytiff.TiffFileReader (fileobject)

# do some stuff

allinone = pytiff.TiffFileWriter ("allinone.tiff")
allinone.append (fifffile)

Of course I dont wanna write the "in between" File to disk with
image.save () I do wann to to use a memory file object. The Image
Documentation says that file object just has to implement seek, tell
and write. Does anybody have an example how to do that or maybe a
snipplet for an "In Memory" File Object with an unknown size.

Kind Regards

Michael


From caleb1 at telkomsa.net  Sun Feb  6 23:34:32 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Sun, 06 Feb 2005 23:34:32 -0500
Subject: loops -> list/generator comprehensions
References: <1107718117.221204.80410@l41g2000cwc.googlegroups.com>
	<opsls54qat1js0xs@news.telkomsa.net>
	<4qCdnXI11-vhGJvfRVn-vQ@comcast.com>
Message-ID: <opsls8buf21js0xs@news.telkomsa.net>

Sure Steve

Lemme see ... (indentation changed so comments associate with correct bits)

> Out of curiosity, do you find:
>
> filenames = [os.path.join(dirpath, filename)
                       # This is cool
              for dirpath, _, filenames in os.walk('.')
              # This is getting tricky, whats the '_' for?  Which thing  
goes where again in a comprehension?
                        for filename in filenames]
                        # The hierarchy has nailed me by this point.  I  
will have to start over...

Yes, yes I do find it more difficult to read.  Maybe I just don't know  
python as well as I should (certainly not as well as others here!).  I  
guess it is just familiarity.  A single comprehension is ok, nesting them  
gets tricky, and 3 times is a strike for me.  I will practise :)

keep well
Caleb





From cam.ac.uk at mh391.invalid  Mon Feb 28 06:09:55 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Mon, 28 Feb 2005 11:09:55 +0000
Subject: Explicit or general importing of namespaces?
In-Reply-To: <38gc2tF5o34sbU1@individual.net>
References: <1109588238.491145.52060@l41g2000cwc.googlegroups.com>
	<38gc2tF5o34sbU1@individual.net>
Message-ID: <cvuu66$jvu$1@gemini.csx.cam.ac.uk>

Diez B. Roggisch wrote:
 >[Harlin Seritt]:
>>Is there really a major performance difference between doing the
> 
> No.

Actually, if you are using a name in another module repeatedly
in an inner loop, it can make a big difference if you have to lookup
the name in the module repeatedly. In that case, just explicitly
import the name you want to use repeatedly:

from Tkinter import Label, otherfunction, othervariable

Of course, you are not likely to see this use case when you're doing
UI programming.

But don't do "from Tkinter import *" for the reasons Diez has
identified in the FAQ.
-- 
Michael Hoffman


From dontwant at spam.com  Sat Feb  5 22:45:05 2005
From: dontwant at spam.com (Courageous)
Date: Sat, 05 Feb 2005 19:45:05 -0800
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
References: <ctsjmg$75p$1@usenet.otenet.gr><pan.2005.02.03.19.10.39.349763@jerf.org>	<ueCMd.22177$Ck1.1629547@news20.bellglobal.com>
	<ctv8r8$cks$1@sea.gmane.org>
	<mailman.1935.1107561038.22381.python-list@python.org>
Message-ID: <ib4b01d5lq3hjocs9e2rlk2ibdp1t7kf3l@4ax.com>


>Well, we don't have to ban them because we have the PSU eliminate them 
>alltogether. So much more efficient. Or do you think it's a coincidence 
>we've never seen or heard Timothy "autocoding" Rue again?

Foolish, man! You said his name! It's almost like you said C'thul'hu, ...
you ... ah.... no, no, NO! N'YAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH

*insert ripping and splashing sounds*



From fperez.net at gmail.com  Thu Feb  3 18:10:40 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Thu, 03 Feb 2005 16:10:40 -0700
Subject: python-mode tab completion problem
References: <1107467959.821309.102850@z14g2000cwz.googlegroups.com>
	<16898.42642.530502.108487@montanaro.dyndns.org>
Message-ID: <ctub07$kiv$1@sea.gmane.org>

Skip Montanaro wrote:

> 
>     test1dellboy3> I am exploring python-mode on emacs. When I open foo.py
>     test1dellboy3> in emacs and hit C-!, it starts the python interpreter in
>     test1dellboy3> another window. Next, I execute -
> 
>     ...
> 
> That's not really intended to be used as an interactive session with all
> sorts of bells and whistles.

Or he can use ipython, which with the special ipython.el companion file and a
recent (CVS) python-mode, will give him true tab completion (with options
listed in an emacs *completions* buffer) for all objects.

With ipython's %pdb active, it will also open up the source at any uncaught
exception, at the line of the exception.  Very handy for debugging.

Regards,

f

ps. All this fanciness is thanks to the sustained efforts of A. Schmolck and P.
Ramachandran, I'm just happy to use them (I can't code a line of elisp).



From Scott.Daniels at Acm.Org  Mon Feb 14 15:14:45 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Mon, 14 Feb 2005 12:14:45 -0800
Subject: For American numbers
In-Reply-To: <mailman.2535.1108394317.22381.python-list@python.org>
References: <420e7376$1@nntp0.pdx.net>
	<mailman.2535.1108394317.22381.python-list@python.org>
Message-ID: <421102d6$1@nntp0.pdx.net>

Neil Benn wrote:
> Scott David Daniels wrote:
>> Kind of fun exercise (no good for British English).
> what's American about it?  If anything, it's more French than American ;-)

Well, actually this started with scaling integers, and I was worried
about a billion / billionth (and up / down).  In mid-task I switched
to ISO prefix without bothering to update my mental state.  So I
warned about a problem that a former version of this code had.  As I
hit send, I realized my stupidity, but figured I was better off not
wasting more bandwidth (which I now have done).  If I had it to do
over again, I'd have made the default unit something like meters --
again non-British, and it avoids the issue of 1024 / 1000 altogether.

grinning-stupidly,

Scott David Daniels
Scott.Daniels at Acm.Org



From eric_brunel at despammed.com  Wed Feb  9 07:10:59 2005
From: eric_brunel at despammed.com (Eric Brunel)
Date: Wed, 09 Feb 2005 13:10:59 +0100
Subject: tkinter menu bar problem
References: <gAmOd.31235$68.23603@fe1.news.blueyonder.co.uk>
Message-ID: <opslxisl0urqur0o@eb.pragmadev>

On Wed, 09 Feb 2005 11:35:40 GMT, John Pote <johnpote at blueyonder.co.uk>  
wrote:

> I have a menu bar in a top level window as follows
[snip code]
>
> Q1 Cannot find a way of changing the menu bars background colour. When
> colour options are accepted they seem to be ignored. Is this a native  
> look
> and feel characteristic of write once run anywhere, not yet implemented  
> or
> possibly a bug.

Even if the tk man pages [1] don't mention it, it would not be surprising  
if the background option for menu items did not work on Windows, since  
many things seem to be "hardcoded" on this platform. I tested the  
following code on Linux; it works without problem and has the expected  
behaviour:

>>> from Tkinter import *
>>> root = Tk()
>>> mb = Menu(root)
>>> root.configure(menu=mb)
>>> m = Menu(mb)
>>> mb.add_cascade(label='Menu', menu=m)
>>> m.add_command(label='Quit', command=root.quit, background='red')

If it is what you did and if it doesn't work on Windows, it is likely that  
the background option for menu items is not supported for this platform...

> Q2 Some of the menu options in the config menu will not always be  
> available
> depending on program state. How can individual items in such a menu be
> turned to faint gey to indicate their unavailability. Also a tick mark
> against an item would be useful to show the currently selected option. Is
> this possible?

To "grey out" a menu item:

parentMenu.entryconfigure(itemIndex, state=DISABLED)

To have menu items with a check-mark, use the add_checkbutton or  
add_radiobutton methods on the parent menu. Their use is similar to the  
Checkbutton and Radiobutton classes. See [1] for all available options.

[1] http://www.tcl.tk/man/tcl8.4/TkCmd/menu.htm
  - Eric Brunel -


From steven.bethard at gmail.com  Fri Feb 11 17:44:45 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 11 Feb 2005 15:44:45 -0700
Subject: check if object is number
In-Reply-To: <mailman.2413.1108154971.22381.python-list@python.org>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
	<mailman.2413.1108154971.22381.python-list@python.org>
Message-ID: <OqOdnf5dC6nHqJDfRVn-1Q@comcast.com>

Fredrik Lundh wrote:
> Steven Bethard wrote:
>> Is there a good way to determine if an object is a numeric type?
> 
> assert operator.isNumberType(i)

Interesting, thanks!  If I read the source right, PyNumber_Check (which 
operator.isNumberType is an alias for) basically just returns True if 
the object's type has a __int__ or __float__ method defined:

int
PyNumber_Check(PyObject *o)
{
	return o && o->ob_type->tp_as_number &&
	       (o->ob_type->tp_as_number->nb_int ||
		o->ob_type->tp_as_number->nb_float);
}

Did I read that right?

Steve


From merman at o2online.de  Fri Feb 11 09:48:55 2005
From: merman at o2online.de (TK)
Date: Fri, 11 Feb 2005 15:48:55 +0100
Subject: Install MySQLdb on Mac OS X (10.3)
In-Reply-To: <mailman.2360.1108089047.22381.python-list@python.org>
References: <420bf2f4$0$16553$9b622d9e@news.freenet.de>
	<mailman.2360.1108089047.22381.python-list@python.org>
Message-ID: <420cc58a$0$27570$9b622d9e@news.freenet.de>

Skip Montanaro wrote:
>     TK> I can't install MySQLdb on Mac OS X (Ver. 10.3) properly. Here's my 
>     TK> environment:
> 
>     TK> 1. MySQL-python-1.0.0
> 
>     ...
> 
> Try a more recent version of mysql-python.  I think 1.1.7 is the latest.
> 
> Skip


Hi Skip,

 > Try a more recent version of mysql-python.  I think 1.1.7 is the latest.


It now works with MySQL-python-1.2.0

And I have to set:

export 
PATH=$PATH:/usr/local/mysql-standard-4.1.9-apple-darwin7.7.0-powerpc/bin

Thanks for the hint.

o-o

Thomas


From rkern at ucsd.edu  Fri Feb 18 16:14:43 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Fri, 18 Feb 2005 13:14:43 -0800
Subject: Python, Matlab and AI question
In-Reply-To: <yfsekfdipgh.fsf@black4.ex.ac.uk>
References: <mailman.2789.1108700285.22381.python-list@python.org>
	<cv4k1h$i3f$1@news1.ucsd.edu> <yfsekfdipgh.fsf@black4.ex.ac.uk>
Message-ID: <cv5ls3$t2$1@news1.ucsd.edu>

Alexander Schmolck wrote:

> Actually, I've written a highlevel matlab-python bridge (based on bugfixed and
> slightly extended version of the original pymat) which is quite up-to-date; by
> and large it makes using matlab from python as easy as if matlab were just
> some python library:

Fantastic! I've added a link to the Scipy Wiki:

   http://www.scipy.org/wikis/topical_software/TopicalSoftware

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From samantha7395 at hotmail.com  Thu Feb 17 21:43:22 2005
From: samantha7395 at hotmail.com (Samantha)
Date: Thu, 17 Feb 2005 18:43:22 -0800
Subject: Probably over my head... Trying to get Font Names
References: <B8KdneiuyLaKoYjfRVn-vQ@adelphia.com>
	<mailman.2786.1108689703.22381.python-list@python.org>
Message-ID: <8oydnSIY04Xby4jfRVn-iA@adelphia.com>

Thanks Mike. I must have not installed the ttfquery and font tools 
correctly. I get an error. This error:

Traceback (most recent call last):
  File "C:\Python24\Lib\font-getter.py", line 1, in -toplevel-
    from ttfquery import _scriptregistry
  File "C:\Python24\Lib\site-packages\ttfquery\_scriptregistry.py", line 1, 
in -toplevel-
    from ttfquery import ttffiles
  File "C:\Python24\Lib\site-packages\ttfquery\ttffiles.py", line 10, 
in -toplevel-
    from ttfquery import describe, findsystem
  File "C:\Python24\Lib\site-packages\ttfquery\describe.py", line 2, 
in -toplevel-
    from fontTools import ttLib
ImportError: No module named fontTools

Like I said I think I am way in over my short head.
S
"Mike C. Fletcher" <mcfletch at rogers.com> wrote in message 
news:mailman.2786.1108689703.22381.python-list at python.org...
> If you don't have a GUI library to use, TTFQuery+Fonttools will retrieve 
> this information:
>
> from ttfquery import _scriptregistry
> fonts = _scriptregistry.registry.fonts.keys()
> fonts.sort()
> for name in fonts:
>    print name
>
> if you do have a GUI, your GUI library will almost certainly have a 
> mechanism to retrieve the list of fonts.  With wxPython, for instance, 
> it's called wxFontEnumerator.  If you just want the user to choose a font, 
> most GUI libraries already have controls/dialogues that can handle it.
>
> TTFQuery is going out, reading the .ttf fonts with Fonttools and storing 
> their metadata in an index for faster access, whereas your GUI library 
> will be using a simple API call to retrieve the metadata.  That means 
> TTFQuery is going to be heavier, but it can, for instance, also give you 
> information about fonts not installed on the system.
>
> HTH,
> Mike
>
> TTFQuery:
>    http://ttfquery.sourceforge.net/
>
>
> Samantha wrote:
>
>>I am attempting to extract the Font Names from the installed windows 
>>fonts. I am having a heck of a time getting these rather than the file 
>>names. Examples can be seen by going to Control Panel > Fonts
>>
>>Any help or direction is appreciated.
>>S
> ________________________________________________
>  Mike C. Fletcher
>  Designer, VR Plumber, Coder
>  http://www.vrplumber.com
>  http://blog.vrplumber.com
>                              PyCon is coming...
> 




From kent37 at tds.net  Fri Feb 25 21:13:43 2005
From: kent37 at tds.net (Kent Johnson)
Date: Fri, 25 Feb 2005 21:13:43 -0500
Subject: Converting HTML to ASCII
In-Reply-To: <mailman.3027.1109294801.22381.python-list@python.org>
References: <mailman.3027.1109294801.22381.python-list@python.org>
Message-ID: <421fd82a$1_1@newspeer2.tds.net>

gf gf wrote:
> Hi.  I'm looking for a Python lib to convert HTML to
> ASCII. 

You might find these threads on comp.lang.python interesting:
http://tinyurl.com/5zmpn
http://tinyurl.com/6mxmb

Kent


From ncoghlan at iinet.net.au  Thu Feb  3 06:17:15 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Thu, 03 Feb 2005 21:17:15 +1000
Subject: new style exception handleing
In-Reply-To: <f849d2-8h.ln1@pluto.i.infosense.no>
References: <a677d2-h8g.ln1@pluto.i.infosense.no>	<2LydnVuDKZ32iZzfRVn-qg@powergate.ca>
	<f849d2-8h.ln1@pluto.i.infosense.no>
Message-ID: <4202083B.9000503@iinet.net.au>

Ola Natvig wrote:
> Peter Hansen wrote:
>> I can't actually think of a reason to need to base an
>> exception on a new-style class, but perhaps you have a
>> good one...
> 
> It's quite simple to bypass the problem, it was more the reason I was 
> wondering about too.

Basically because fixing it without killing backward compatibility with string 
exceptions is hard :)

Doesn't mean people aren't trying though (Google the python-dev archives, as 
well as the python-list ones).

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From apardon at forel.vub.ac.be  Thu Feb 10 04:23:13 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 10 Feb 2005 09:23:13 GMT
Subject: variable declaration
References: <1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4207fd24@fidonet.org>
	<UmSNd.104914$Jk5.59261@lakeread01>
	<4208178F.40804@po-box.mcgill.ca> <cu9ask$r81$1@sea.gmane.org>
	<mailman.2150.1107853621.22381.python-list@python.org>
	<cua11b$5nc$00$1@news.t-online.com>
	<mailman.2157.1107859666.22381.python-list@python.org>
Message-ID: <slrnd0ma00.26q.apardon@rcpc42.vub.ac.be>

Op 2005-02-08, Fredrik Lundh schreef <fredrik at pythonware.com>:
> Peter Otten wrote:
>
>>> executed. the compiler handles "global" and "from __future__", everything
>>> else is done at runtime.
>>
>> and __debug__, too, it seems:
>
> you left out the "python -O" line.
>
>>>>> __debug__
>> False
>>>>> def f():
>> ...     if __debug__:
>> ...             global x
>> ...     x = 42
>> ...
>>>>> f()
>>>>> x
>> Traceback (most recent call last):
>>  File "<stdin>", line 1, in ?
>> NameError: name 'x' is not defined
>
> yup, but unlike the two others, that's a CPython -O implementation issue.
> (I'd say bug, in this case).
>
> neither standard CPython (without -O) nor Jython behave this way.
>

If people here are so against declarations, how do they feel about
statements that don't seem like declarations but have a declarative
effect anyway?

Because that is what assignment statements in python essentially are.
If assignments wouldn't have a declarative effect then code like
the following should work:

x = 42

def f():
  if False:
    x = 20
  return x

f()


If the x = 20 would be a pure executing statement, then how come
its presence has an effect on the return statement even when it
isn't executed. And we can play the same trick here. calling python -O
and feeding it this program but with the False replaced by __debug__
will make this "work".

So having come to the conclusion that some statements have a declarative
effect, I would prefer to have the declaration and the assignment be
seperated in two different statements. That would make the declaration
explicit instead of being implicit now and explicit is better than
implicit.

Of course the other solution, simply removing the declarative effect from
assignments, could work too and might even be preferable but I fear
it would produce strange behaviour.

-- 
Antoon Pardon


From john at grulic.org.ar  Tue Feb  1 11:03:43 2005
From: john at grulic.org.ar (John Lenton)
Date: Tue, 1 Feb 2005 13:03:43 -0300
Subject: Remove HTML tags (except anchor tag) from a string using
	regular expressions
In-Reply-To: <41FF7013.7030309@zp-solutions.com>
References: <41FF7013.7030309@zp-solutions.com>
Message-ID: <20050201160343.GD5205@grulic.org.ar>

On Tue, Feb 01, 2005 at 01:03:31PM +0100, Nico Grubert wrote:
> Hello,
> 
> I want to remove all html tags from a string "content" except <a 
> ...>xxx</a>.
> 
> My script reads like this:
> 
> ###
> import re
> content = re.sub('<([^!>]([^>]|\n)*)>', '', content)
> ###
> 
> It works fine. It removes all html tags from "content".
> Unfortunately, this also removes  <a ...>xxx</a> occurancies.
> Any idea, how to modify this to remove all html tags except <a ...>xxx</a>?

not sure what the outer parenthesis are there for, i.e. afaics 

    <([^!>]([^>]|\n)*)>

is the same as

    <[^!>](?:[^>]|\n)*>

for doing a re.sub; the grouping parentheses are only needed if you
actually need the groups later on.

Try this:

    <(?!(?:a\s|/a|!))[^>]*>

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
Slurm, n.:
	The slime that accumulates on the underside of a soap bar when
	it sits in the dish too long.
		-- Rich Hall, "Sniglets"
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From aleaxit at yahoo.com  Wed Feb  9 08:14:25 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Wed, 9 Feb 2005 14:14:25 +0100
Subject: empty classes as c structs?
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>
	<mailman.1973.1107618702.22381.python-list@python.org>
	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>
	<mailman.2006.1107658273.22381.python-list@python.org>
	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>
	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>
	<mailman.2049.1107750700.22381.python-list@python.org>
	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com>
	<4207606E.4040806@iinet.net.au> <cu8amb$ufa$1@sea.gmane.org>
	<mailman.2158.1107859833.22381.python-list@python.org>
	<1grnyld.1t8l5kw1nr5aqsN%aleaxit@yahoo.com>
	<mailman.2238.1107950220.22381.python-list@python.org>
Message-ID: <1grpz9z.tycvyx1jrdzeiN%aleaxit@yahoo.com>

Nick Coghlan <ncoghlan at iinet.net.au> wrote:

> Alex Martelli wrote:
> > One thing I'd like to see in namespaces is _chaining_ -- keeping each
> > namespace separate but having lookups proceed along the chain.  (The
> > best semantics for _bindings_ as opposed to lookups isn't clear though).
> 
> Hmm, so if it doesn't find it in the current namespace, it looks in the
> parent?

Yep.

> For bindings, you could just go with standard Python semantics - normal
> name binding always happens in the innermost scope, so binding a name in a
> namespace should happen in the directly referenced namespace. Then you can
> shadow names from outer scopes, and later regain access to them using
> 'del'.

...which you can't do in "standard Python semantics" - if a name is
local, it's local throughout.  You can't do that with a namespace
object, which is why I think the best semantics for bindings in that
case isn't all that clear.


Alex


From behnel_ml at gkec.informatik.tu-darmstadt.de  Wed Feb  9 10:48:32 2005
From: behnel_ml at gkec.informatik.tu-darmstadt.de (Stefan Behnel)
Date: Wed, 09 Feb 2005 16:48:32 +0100
Subject: probably weird or stupid newbie dictionary question
In-Reply-To: <1107962661.011759.30100@f14g2000cwb.googlegroups.com>
References: <1107962661.011759.30100@f14g2000cwb.googlegroups.com>
Message-ID: <cudbch$hkb$1@lnx107.hrz.tu-darmstadt.de>



hawkmoon269 schrieb:
> some other languages' hash table (Perl's, for instance).  But FMU a
> dictionary's keys are *themselves* hashed so that a hash table exists
> that maps hashed key values to keys in the dictionary.

I guess you're mixing up the terms "hashing" and "storing in a hash-table".

When we hash a dictionary key

 >>> a = hash(key)

then we retrieve a value that is used to refer to the value that we want 
to store. Ok? :)

1>>> mydict = {}
2>>> mydict['mykey'] = 'somevalue'
3>>> mydict['mykey']
'somevalue'

What happened, was:

1) mydict becomes a dictionary

2a) mydict hashed the key 'mykey' and got an integer value. Strings know 
how to calculate a hash value for themselves, that value is retrieved via 
a call to hash('mykey')

2b) mydict then stored the value 'myvalue' at a location that the hashed 
key refers to (don't care how that is done)

3) mydict hashes the key 'mykey' and retrieves an integer. It looks at the 
location that that int refers to and finds the value 'somevalue' that was 
previously stored there. It returns that value.

A bit clearer now?

Stefan


From kbk at shore.net  Tue Feb 22 23:19:55 2005
From: kbk at shore.net (Kurt B. Kaiser)
Date: Tue, 22 Feb 2005 23:19:55 -0500 (EST)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200502230419.j1N4Jthi005718@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  308 open (+10) /  2755 closed ( +1) /  3063 total (+11)
Bugs    :  838 open (+15) /  4834 closed ( +5) /  5672 total (+20)
RFE     :  168 open ( +0) /   148 closed ( +4) /   316 total ( +4)

New / Reopened Patches
______________________

do not add directory of sys.argv[0] into sys.path  (2004-05-02)
       http://python.org/sf/946373  reopened by  wrobell

isapi.samples.advanced.py fix  (2005-02-17)
       http://python.org/sf/1126187  opened by  Philippe Kirsanov

more __contains__ tests  (2005-02-17)
       http://python.org/sf/1141428  opened by  Jim Jewett

Fix to allow urllib2 digest auth to talk to livejournal.com  (2005-02-18)
       http://python.org/sf/1143695  opened by  Benno Rice

Add IEEE Float support to wave.py  (2005-02-19)
       http://python.org/sf/1144504  opened by  Ben Schwartz

cgitb: make more usable for 'binary-only' sw (new patch)  (2005-02-19)
       http://python.org/sf/1144549  opened by  Reinhold Birkenfeld

allow UNIX mmap size to default to current file size (new)  (2005-02-19)
       http://python.org/sf/1144555  opened by  Reinhold Birkenfeld

Make OpenerDirector instances pickle-able  (2005-02-20)
       http://python.org/sf/1144636  opened by  John J Lee

webbrowser.Netscape.open bug fix  (2005-02-20)
       http://python.org/sf/1144816  opened by  Pernici Mario

Replace store/load pair with a single new opcode  (2005-02-20)
       http://python.org/sf/1144842  opened by  Raymond Hettinger

Remove some invariant conditions and assert in ceval  (2005-02-20)
       http://python.org/sf/1145039  opened by  Neal Norwitz

Patches Closed
______________

date.strptime and time.strptime as well  (2005-02-04)
       http://python.org/sf/1116362  closed by  josh-sf

New / Reopened Bugs
___________________

attempting to use urllib2 on some URLs fails starting on 2.4  (2005-02-16)
       http://python.org/sf/1123695  opened by  Stephan Sokolow

descrintro describes __new__ and __init__ behavior wrong  (2005-02-15)
       http://python.org/sf/1123716  opened by  Steven Bethard

gensuitemodule.processfile fails  (2005-02-16)
       http://python.org/sf/1123727  opened by  Jurjen N.E. Bos

PyDateTime_FromDateAndTime documented as PyDate_FromDateAndT  (2005-02-16)
CLOSED http://python.org/sf/1124278  opened by  smilechaser

Function's __name__ no longer accessible in restricted mode  (2005-02-16)
CLOSED http://python.org/sf/1124295  opened by  Tres Seaver

Python24.dll crashes, EXAMPLE ATTACHED  (2005-02-12)
CLOSED http://python.org/sf/1121201  reopened by  complex

IDLE line wrapping  (2005-02-16)
CLOSED http://python.org/sf/1124503  opened by  Chris Rebert

test_os fails on 2.4  (2005-02-17)
CLOSED http://python.org/sf/1124513  reopened by  doerwalter

test_os fails on 2.4  (2005-02-16)
CLOSED http://python.org/sf/1124513  opened by  Brett Cannon

test_subprocess is far too slow  (2005-02-17)
       http://python.org/sf/1124637  opened by  Michael Hudson

Math mode not well handled in \documentclass{howto}  (2005-02-17)
       http://python.org/sf/1124692  opened by  Daniele Varrazzo

GetStdHandle in interactive GUI  (2005-02-17)
       http://python.org/sf/1124861  opened by  davids

subprocess.py Errors with IDLE  (2005-02-17)
       http://python.org/sf/1126208  opened by  Kurt B. Kaiser

subprocesss module retains older license header  (2005-02-17)
       http://python.org/sf/1138653  opened by  Tres Seaver

Python syntax is not so XML friendly!  (2005-02-18)
CLOSED http://python.org/sf/1143855  opened by  Colbert Philippe

inspect.getsource() breakage in 2.4  (2005-02-18)
       http://python.org/sf/1143895  opened by  Armin Rigo

future warning in commets  (2005-02-18)
       http://python.org/sf/1144057  opened by  Grzegorz Makarewicz

reload() is broken for C extension objects  (2005-02-19)
       http://python.org/sf/1144263  opened by  Matthew G. Knepley

htmllib quote parse error within a <script>  (2005-02-19)
       http://python.org/sf/1144533  opened by  Allan Hoeltje

No os.statvfs on FreeBSD  (2005-02-21)
       http://python.org/sf/1145231  opened by  Volker Stolz

shutil.copystat() may fail...  (2005-02-21)
       http://python.org/sf/1145257  opened by  Petr Prikryl

Strange behaviour concerning variable names  (2005-02-22)
CLOSED http://python.org/sf/1145950  opened by  Felix Nawothnig

bsddb3 build problems on FreeBSD (2.4 + 2.5)  (2005-02-23)
       http://python.org/sf/1146231  opened by  Andrew I MacIntyre

Windows deadlock with PyEval_ReleaseLock   (2005-02-22)
       http://python.org/sf/1147646  opened by  Lou Montulli

fix bsddb documentation psize -> pgsize  (2005-02-22)
       http://python.org/sf/1149413  opened by  Martin Mokrejs

bssdb wrapper does not export some low-level functions  (2005-02-23)
       http://python.org/sf/1149447  opened by  Martin Mokrejs

Bugs Closed
___________

Static library incompatible with nptl  (2005-02-10)
       http://python.org/sf/1119860  closed by  loewis

PyDateTime_FromDateAndTime documented as PyDate_FromDateAndT  (2005-02-16)
       http://python.org/sf/1124278  closed by  bcannon

Function's __name__ no longer accessible in restricted mode  (2005-02-16)
       http://python.org/sf/1124295  closed by  mwh

Python24.dll crashes, EXAMPLE ATTACHED  (2005-02-11)
       http://python.org/sf/1121201  closed by  bcannon

test_os fails on 2.4  (2005-02-17)
       http://python.org/sf/1124513  closed by  doerwalter

test_os fails on 2.4  (2005-02-17)
       http://python.org/sf/1124513  closed by  loewis

Strange behaviour concerning variable names  (2005-02-22)
       http://python.org/sf/1145950  closed by  mwh

RFE Closed
__________

Option to force variables to be declared  (2005-02-14)
       http://python.org/sf/1122279  closed by  rhettinger

Line Numbers  (2005-02-14)
       http://python.org/sf/1122532  closed by  kbk

Python syntax is not so XML friendly!  (2005-02-18)
       http://python.org/sf/1143855  closed by  bcannon

IDLE line wrapping  (2005-02-16)
       http://python.org/sf/1124503  closed by  kbk



From removethis.kartic.krishnamurthy at gmail.com  Sun Feb 27 08:59:58 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Sun, 27 Feb 2005 13:59:58 GMT
Subject: Controlling Pc From Server?
In-Reply-To: <EikUd.39425$nC5.37142@twister.nyroc.rr.com>
References: <mailman.3116.1109511636.22381.python-list@python.org>
	<EikUd.39425$nC5.37142@twister.nyroc.rr.com>
Message-ID: <ynkUd.39426$nC5.22047@twister.nyroc.rr.com>

Kartic said the following on 2/27/2005 8:54 AM:

> For a homegrown solution, if I am not mistaken, you will have to use 
> libpcap (or pypcap) to monitor the packets being sent and received, 
> taking care to exclude the local subnet (or your reporting will be 
> skewed as packets sent to the monitoring server will also be included!). 
> You can check http://www.monkey.org/~dugsong/pypcap/ for more 
> details...and may be for more ideas.

http://winpcap.polito.it/docs/man/html/group__remote__help.html

- Should help. This uses the Winpcap library. Not sure if the same can 
be done using the Python bindings for pcap.


From ilias at lazaridis.com  Sat Feb 19 05:58:21 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sat, 19 Feb 2005 12:58:21 +0200
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <1108766939.959180.273760@z14g2000cwz.googlegroups.com>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>
	<1108411893.940158.270090@c13g2000cwb.googlegroups.com>
	<42163065.8070708@lazaridis.com>
	<mailman.2815.1108754385.22381.python-list@python.org>
	<cv5fnc$ll9$1@usenet.otenet.gr>
	<1108766939.959180.273760@z14g2000cwz.googlegroups.com>
Message-ID: <cv764d$k74$1@usenet.otenet.gr>

A.B., Khalid wrote:
> Ilias Lazaridis wrote:
> 
>>The first step is to make a pyMinGW project.
> 
> You are mistaken. The first steps are the following:
[...] - (nonrelevant comments)

> 3) Realizing that there _is_ already a project called pyMinGW! That it
> does not fit your requirements-- whatever these maybe-- is an
> altogether different issue. The fact of the matter remains that a
> project _does_ exist, one which people (including myself) do in fact
> use; and because it does exist there is no reason to "make" it.
[...]

I've already understood your viewpoint.

I've realized, that there is a single-person-centric project
"pyMinGW" which does not encourage collaboration (due to missing public 
resources like mailinglist).

My requirements about an open-source project (or sub-project) are very 
simple:
   a communication resource,
   a code-repository,
   an issue-tracking-system.

I've suggested you to transform your personal project to a collaborative 
project, starting with an dedicated mailinglist etc.:

"
thank you for your comments.

I will express my suggestion more practically

   * as a first step, I would setup a pyMinGW mailinglist
     * intrested people can come together an communicate
   * as a second step, I would setup an SVN
     * intrested projects could get your patch via SVN
   * as a third step, I would find intrested contributors
     * which would help testing
     * which would help you with coding

All this could happen without (or with very low) efforts for you.
"

-

You have the right to refuse this.

I (and any other reader) have the right to derive our conclusions about 
you and the reasons that you refuse a _real_ collaborative work.

.

> --
> pyMinGW:
> http://jove.prohosting.com/iwave/ipython/pyMinGW.html

.

-- 
http://lazaridis.com


From tim.leeuwvander at nl.unisys.com  Wed Feb  2 09:28:38 2005
From: tim.leeuwvander at nl.unisys.com (Leeuw van der, Tim)
Date: Wed, 2 Feb 2005 15:28:38 +0100
Subject: Crashing Python interpreter! (windows XP, python2.3.4, 2.3.5rc1,
	2.4.0)
Message-ID: <BF88DF69D9E2884B9BE5160DB2B97A8544B0D0@nlshl-exch1.eu.uis.unisys.com>


Hi,

I'm using the following combination of software:
- Pydev Eclipse plugin (pydev 0.8.5)
- eclipse 3.0.1 
- windows XP SP1
- pygtk 2.4.1
- GTK 2.6.1 (for windows32 native)

When trying to get a list of possible completions for the 'gtk' import object, the python interpreter crashes. Happens with all versions listed in the subject: python 2.3.4, 2.3.5rc1, 2.4.0.

I understand that this isn't a useful report (yet) for anyone to look into the problem, but I'd please like to get any hints on how to get more useful crashdumps etc. to help debugging this.

cheers,

--Tim


From steven.bethard at gmail.com  Sat Feb 19 13:10:56 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 19 Feb 2005 11:10:56 -0700
Subject: lambda closure question
In-Reply-To: <1108802613.284686.200170@o13g2000cwo.googlegroups.com>
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
Message-ID: <l_ydnZRMl5-wHIrfRVn-2Q@comcast.com>

Carl Banks wrote:
> You may not be aware of it, but what you're trying to do is called
> "currying"; you might want to search the Python Cookbook for recipes on
> it.

Or look for "partial function application" which has been argued to be 
the correct term for this use...  Also see PEP 309:

http://www.python.org/peps/pep-0309.html

With an appropriately defined "partial" (I've taken the one from the PEP 
and added the descriptor machinery necessary to make it work as an 
instancemethod):

-------------------- functional.py --------------------
class partial(object):
     def __init__(*args, **kwargs):
         self = args[0]
         try:
             self.fn = args[1]
         except IndexError:
             raise TypeError('expected 2 or more arguments, got ' %
                             len(args))
         self.args = args[2:]
         self.kwargs = kwargs
     def __call__(self, *args, **kwargs):
         if kwargs and self.kwargs:
             d = self.kwargs.copy()
             d.update(kwargs)
         else:
             d = kwargs or self.kwargs
         return self.fn(*(self.args + args), **d)
     def __get__(self, obj, type=None):
         if obj is None:
             return self
         return partial(self, obj)

-------------------------------------------------------

py> class C(object):
...     pass
...
py> def func(self, arg):
...     return arg
...
py> lst = ['a', 'b', 'c']
py> for item in lst:
...     setattr(C, item, functional.partial(func, arg=item))
...
py> c = C()
py> c.a(), c.b(), c.c()
('a', 'b', 'c')

STeVe


From marek.prerovsky at seznam.cz  Wed Feb 16 13:37:59 2005
From: marek.prerovsky at seznam.cz (Marek Prerovsky)
Date: Wed, 16 Feb 2005 19:37:59 +0100
Subject: How can I get the source file name and current line number inside
	executed C-function
Message-ID: <012501c51456$a40ff7a0$7357f53e@maarnice>

Hello,

I implemented some Python functions in my C/C++ code. I need to know the Python source file name and line number of just executed 
Python command which calls my function.
How can I get this information inside my C/C++ function?

Thanks for any help.

Marek 



From wenshengwang at gmail.com  Wed Feb 16 12:55:51 2005
From: wenshengwang at gmail.com (Wensheng)
Date: 16 Feb 2005 09:55:51 -0800
Subject: Loading functions from a file during run-time
In-Reply-To: <1108576067.140194.115620@c13g2000cwb.googlegroups.com>
References: <1108091598.055004.24890@g14g2000cwa.googlegroups.com>
	<1108576067.140194.115620@c13g2000cwb.googlegroups.com>
Message-ID: <1108576551.492714.209360@o13g2000cwo.googlegroups.com>

or don't use exec():
f=[getattr(fs,a) for a in dir(fs) if a[0:2]!='__' and
type(getattr(fs,a))==types.FunctionType]
>>> f
[<function negate at 0x100a00>, <function square at 0x144038>]
>>> f[0](n)
-5
>>> f[1](n)
25



From nhodgson at bigpond.net.au  Fri Feb 18 07:18:45 2005
From: nhodgson at bigpond.net.au (Neil Hodgson)
Date: Fri, 18 Feb 2005 12:18:45 GMT
Subject: [EVALUATION] - E02 - ULTIMATE RECIPE TO RESOLVE ALL ISSUES
References: <cuo71l$gig$1@usenet.otenet.gr> <cuv1st$6um$1@swifty.westend.com>
	<mailman.2714.1108579989.22381.python-list@python.org>
	<cv49qp$h7f$1@swifty.westend.com>
Message-ID: <F2lRd.165920$K7.129640@news-server.bigpond.net.au>

Peter Maas:

> Perhaps we will soon see a triumphant publication with the title
> "Ilias Lazaridis - the ELIZA of the 21st century. A milestone towards
> the perfect Turing test" ;)

   <ILI>as la<ZA>ridis

   Neil




From jkjone2002 at att.net  Wed Feb 16 18:52:30 2005
From: jkjone2002 at att.net (john san)
Date: Wed, 16 Feb 2005 18:52:30 -0500
Subject: [newbie]How to install python under DOS and is there any
	Wxpython can be installed under dos?
References: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
	<1108557065.547230.254540@z14g2000cwz.googlegroups.com>
	<b9-dnTQOwoYK647fRVn-2Q@rogers.com>
	<11172sa1sg2svc8@corp.supernews.com>
Message-ID: <l4OdneC_7ZH2oInfRVn-3A@rogers.com>


Actually the "windows" running very good under the xbox-NTOS via
xboxmediacenter. its just limited functions(not easy to programming the
"windows" prog.), if we can find WxPython-like can be ported (I can import *
from it  to my xboxPython) )it will be a great great ......... You will have
HD screen and web surfing on HDTV and computing on HDTV. think about it!
That is a real thing the python-like lang. should to do otherwise just a
garbage(toy).




"Jeff Shannon" <jeff at ccvcorp.com> ????
news:11172sa1sg2svc8 at corp.supernews.com...
> john san wrote:
>
> > Just want to show "windows" under dos without MsWindows. Also find some
> > difficulty to simply install WxPython under directory(DOS) and then run,
> > which is very good thing if it is just like Java.
>
> I don't think you'll have any luck finding wxPython for DOS.  A bit of
> a looksee around the wxWidgets website (wxPython is a wrapper for
> wxWidgets) mentions being available for Win3.1 and up, as well as
> various levels of *nix installs (wxGTK, wxMotif, wxX11), but no
> mention of DOS.  I suppose that a very ambitious person could perhaps
> get the wxUniversal port to run on DOS, but I presume that this would
> be far from trivial.
>
> On the other hand, you probably could find and/or create some sort of
> basic text-only windowing library.  It won't be wxPython, nor anything
> even close to that level of sophistication, but that's what happens
> when you insist on using an OS that's been obsolete for a decade or
> more. ;)
>
> Jeff Shannon
> Technician/Programmer
> Credit International
>




From snail at objmedia.demon.co.uk  Mon Feb 14 15:15:03 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Mon, 14 Feb 2005 20:15:03 +0000
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupupa$kfs$2@usenet.otenet.gr>
	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>
	<cuqqqi$ep1$1@ctb-nnrp2.saix.net>
	<1108407625.250592.104280@c13g2000cwb.googlegroups.com>
	<jN0XedqDmPECFwnz@objmedia.demon.co.uk>
	<1108409476.874751.16600@l41g2000cwc.googlegroups.com>
	<gjA3VcsQFQECFw0m@objmedia.demon.co.uk>
Message-ID: <YTF5JFuHbQECFww+@objmedia.demon.co.uk>

In message <gjA3VcsQFQECFw0m at objmedia.demon.co.uk>, Stephen Kellett 
<snail at objmedia.demon.co.uk> writes
>In message <1108409476.874751.16600 at l41g2000cwc.googlegroups.com>, Pat 
><pobrien at orbtech.com> writes
>>if I have both versions of Python installed - 2.3.5 and 2.4?  Is there
>>an easy way to detect this and switch between the two dlls?
>
>Easy? Depends what you call easy.
>
>a) You just need to detect if pythonNN.dll is implicitly linked to 
>msvcrt.dll or msvcrXX.dll (where XX indicates a VS studio number, 
>currently XX can only be 71, but if Python is done for Visual Studio 
>2005 (8.0) then XX may also have a value of 80).

I should have also mentioned that if you don't know how to do get the 
list of imported DLLs you can grab the source code for the PE Explorer 
DLL from:

http://www.objmedia.demon.co.uk/freeSoftware/peFileDLL.html

If you want to see how to use this DLL you can also grab:

http://www.objmedia.demon.co.uk/freeSoftware/peFileExplorer.html

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From http  Wed Feb 16 23:38:04 2005
From: http (Paul Rubin)
Date: 16 Feb 2005 20:38:04 -0800
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<Xns95FFF321AD909PaCmAnRDLM@212.27.42.70>
	<7xbrakjeu1.fsf@ruckus.brouhaha.com>
	<9sTQd.33120$XY5.31311@fe2.columbus.rr.com>
	<7x7jl7g9sa.fsf@ruckus.brouhaha.com>
	<5tUQd.3162$LD5.1258@fe2.columbus.rr.com>
Message-ID: <7xr7jfrec3.fsf@ruckus.brouhaha.com>

Jamey Cribbs <jcribbs at twmi.rr.com> writes:
> The only time there might be trouble is if two clients try to write to
> the same table (physical file) at the same time. 

Yes, that's what I'm concerned about.

> When it writes to a file, KirbyBase opens it in append mode (r+, I
> think).  My guess would be, whichever client got there first would
> open the file.  The second client, arriving a split second later,
> would attempt to open the file in append mode also and KirbyBase
> would return an exception.  If your cgi script caught and handled
> the exception, you would be fine.

I don't think the OS will stop both processes from opening in append
mode (which just means opening the file and seeking to the end) at
once unless you use O_EXCL or something.  Then you're left with
handling the exception, which may get messy if you want to have all
the corner cases correct.  It would be nice if there was a published
code snippet somewhere that did that.  I may try writing one.

The best solution, I think, is Michele Simionato's, which is to use
the currently-undocumented bsddb transction features.  Those features
are the right technical approach to this problem.  But they really
ought to get documented first.


From aahz at pythoncraft.com  Sun Feb 13 19:53:19 2005
From: aahz at pythoncraft.com (Aahz)
Date: 13 Feb 2005 19:53:19 -0500
Subject: Kill GIL
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<868y5t6sal.fsf@guru.mired.org> <cumoue$9ur$1@panix2.panix.com>
	<86sm405d38.fsf@guru.mired.org>
Message-ID: <cuospv$lfn$1@panix2.panix.com>

In article <86sm405d38.fsf at guru.mired.org>, Mike Meyer  <mwm at mired.org> wrote:
>aahz at pythoncraft.com (Aahz) writes:
>> In article <868y5t6sal.fsf at guru.mired.org>, Mike Meyer  <mwm at mired.org> wrote:
>>>
>>>Here here. I find that threading typically introduces worse problems
>>>than it purports to solve.
>>
>> Threads are also good for handling blocking I/O.
>
>Actually, this is one of the cases I was talking about. I find
>it saner to convert to non-blocking I/O and use select() for
>synchronization. That solves the problem, without introducing any of
>the headaches related to shared access and locking that come with
>threads.

It may be saner, but Windows doesn't support select() for file I/O, and
Python's threading mechanisms make this very easy.  If one's careful
with application design, there should be no locking problems.  (Have you
actually written any threaded applications in Python?)
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From jzgoda at gazeta.usun.pl  Sun Feb 20 04:20:15 2005
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Sun, 20 Feb 2005 10:20:15 +0100
Subject: recommended way of generating HTML from Python
In-Reply-To: <1108889625.068929.88890@z14g2000cwz.googlegroups.com>
References: <1108889625.068929.88890@z14g2000cwz.googlegroups.com>
Message-ID: <cv9kpi$qa5$1@atlantis.news.tpi.pl>

Michele Simionato napisa?(a):

> What is the recommended way of generating HTML from Python? I know of
> HTMLGen and of
> few recipes in the Cookbook, but is there something which is more or
> less standard?
> Also, are there plans to include a module for HTML generation in the
> standard library?
> I really would like to see some standardization in this area.

I don't thing there is anything "recommended" except personal 
recommendations. Personally, I like Hamish Sanderson's HTMLTemplate 
(http://freespace.virgin.net/hamish.sanderson/htmltemplate.html), but I 
may be biased. ;)

Hamish planned to start process that would lead to inclusion of 
HTMLTemplate to standard library, but I don't think it's gonna happen in 
any foreseeable future.

-- 
Jarek Zgoda
http://jpa.berlios.de/ | http://www.zgodowie.org/


From macrocosm at fastmail.fm  Fri Feb 11 18:32:59 2005
From: macrocosm at fastmail.fm (Arich Chanachai)
Date: Fri, 11 Feb 2005 18:32:59 -0500
Subject: Big development in the GUI realm
In-Reply-To: <cujeo7$p8f$1@news1.ucsd.edu>
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>	<mailman.2092.1107797420.22381.python-list@python.org>	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>	<mailman.2095.1107801722.22381.python-list@python.org>	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>	<4207c8db$0$21623$a1866201@visi.com>	<cub12p$pke$1@achot.icm.edu.pl>	<36sip2F56jjmaU1@individual.net>	<umzubw8xg.fsf@vh-s.de>	<420cb65f$0$238$edfadb0f@dread12.news.tele.dk>	<18174288.akFrdXrZLZ@jupiter.g2ctech>	<mailman.2425.1108163801.22381.python-list@python.org>
	<cujeo7$p8f$1@news1.ucsd.edu>
Message-ID: <420D40AB.5010405@fastmail.fm>

Robert Kern wrote:

> Arich Chanachai wrote:
> > I have never seen a commercial license for a library
>
>> which stated that you did not have to pay the license fee until you 
>> have made that much money in sales from the software which you 
>> created, in part, from that library.  I would be in favor of such a 
>> license, but I haven't seen anything of the sort.
>
>
> http://www.fastio.com/licensePlain.html
>
> See their license option for shareware developers.
>
I stand corrected.  Nevertheless, my point stands as this is rare.  In 
fact, this thread began as a result of Trolltech releasing PyQt for 
windows with a GPL license option in addition to the commercial one, and 
you will notice that there is no special *deferment provision for 
shareware developers *in the specification of commercial license.*  *It 
would be a grand aid to developers if more companies took this noble and 
perhaps more effective approach (versus the gimme-money-now alternative 
which is quite dominant).  I would argue that such a provision is in the 
interests of the toolkit/library developer as this would allow fellows 
to adopt their technology (and eventually pay for this adoption), 
fellows who otherwise could not.

-Arich


From kartic.krishnamurthy at gmail.com  Mon Feb 28 15:27:46 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 28 Feb 2005 12:27:46 -0800
Subject: cannot open file in write mode, no such file or directory
In-Reply-To: <1109620212.056771.77930@o13g2000cwo.googlegroups.com>
References: <1109618906.347448.218700@o13g2000cwo.googlegroups.com>
	<1109619707.033450.227120@f14g2000cwb.googlegroups.com>
	<1109620212.056771.77930@o13g2000cwo.googlegroups.com>
Message-ID: <1109622466.015764.279430@o13g2000cwo.googlegroups.com>

Could you please post your entire program, if possible?

Thanks!



From steven.bethard at gmail.com  Wed Feb  9 18:03:35 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 09 Feb 2005 16:03:35 -0700
Subject: convert list of tuples into several lists
In-Reply-To: <XL6dnRJrPeesD5ffRVn-uw@powergate.ca>
References: <cud40u$vqb$01$1@news.t-online.com>
	<36uihlF58p63iU1@individual.net>
	<_cWdnZN4wO418pffRVn-qA@comcast.com>
	<XL6dnRJrPeesD5ffRVn-uw@powergate.ca>
Message-ID: <Z9ednTx4E-VaC5ffRVn-2Q@comcast.com>

Peter Hansen wrote:
> Steven Bethard wrote:
> 
>> Diez B. Roggisch wrote:
>>
>>> zip(*[(1,4),(2,5),(3,6)])
>>
>> While this is also the approach I would use, it is worth noting that 
>> Guido thinks of this as an abuse of the argument passing machinery:
>>
>> http://mail.python.org/pipermail/python-dev/2003-July/037346.html
> 
> I'm not sure that's the same thread I already read where he
> dissed zip like that, but what I'm wondering is what is the
> alternative?  Is there an equally elegant approach that
> doesn't "abuse" the argument passing machinery?

I know I found it in another thread before.  I think he's said it a few 
times.

Personally, I wish that, if we're not to use zip like this, that Python 
would provide a builtin 'unzip' to do the corresponding thing.


If you're interested in a recipe that does this, you can look at my 
'starzip' recipe which is basically 'unzip' for iterators:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/302325

I guess if we wanted a standard solution to the 'unzip' problem, I could 
rally for this to be added to itertools, but I'm not sure I'm up to the 
task of rewriting it in C...

Steve


From steven.bethard at gmail.com  Tue Feb  1 23:39:27 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 01 Feb 2005 21:39:27 -0700
Subject: Next step after pychecker
Message-ID: <Ctadnef2y-nixJ3fRVn-vQ@comcast.com>

Terry Reedy wrote:
 > Nothing about bytecode is part of the language spec.  And CPython
 > bytecode is version specific.  If the CPython implementation changed
 > from a virtual stack machine to a virtual register machine, as was
 > once discussed, the stack-oriented byte code would be replaced by a
 > register-oriented byte code or virtual machine language.

Thanks for the clarification.  I knew the byte-code changed from version 
to version, but of course so does the language, so that didn't tell me 
much. ;)  So I assume the language spec is basically the grammar and the 
Language Reference docs[1]?  Or is there something more formal?

Steve

[1] e.g. http://docs.python.org/ref/ref.html


From http  Mon Feb 14 04:25:02 2005
From: http (Paul Rubin)
Date: 14 Feb 2005 01:25:02 -0800
Subject: AES crypto in pure Python?
References: <1108333363.915962.160440@z14g2000cwz.googlegroups.com>
Message-ID: <7xbranze6p.fsf@ruckus.brouhaha.com>

andrew.fabbro at gmail.com writes:
> I'm looking for an implementation of AES (the Advanced Encryption
> Standard) in pure Python.  I'm aware of pycrypto, but that uses C code.
>  I'm hoping to find something that only uses Python...I'm willing to
> trade speed for portability, since my application is designed for
> several different platforms.
> 
> Anyone know if this has been done?

Yes, it's been done a few times, you should be able to find some with
a web search.  The ones I've seen are WAY too slow for most
applications, like a few blocks per second.  If you don't require
using AES, there are some alternatives possible, like using the
built-in sha module as the round function for a Feistel cipher, or
using it in OFB mode as a keystream generator.  I have some examples
of how to do either of these, if you want to see them.


From martin at v.loewis.de  Fri Feb 11 19:33:01 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 12 Feb 2005 01:33:01 +0100
Subject: Is this a bug? BOM decoded with UTF8
In-Reply-To: <mailman.2392.1108129900.22381.python-list@python.org>
References: <epMOd.357$7m.215@read3.inet.fi>	<420bc317$0$4925$9b622d9e@news.freenet.de>	<KT1Pd.641$gz1.258@read3.inet.fi>	<373p8vF57039vU1@individual.net>
	<mailman.2392.1108129900.22381.python-list@python.org>
Message-ID: <420d4ebe$0$4662$9b622d9e@news.freenet.de>

> What are you talking about? The BOM and UTF-16 go hand-and-hand. Without 
> a Byte Order Mark, you can't unambiguosly determine whether big or 
> little endian UTF-16 was used.

In the old days, UCS-2 was *implicitly* big-endian. It was only
when Microsoft got that wrong that little-endian version of UCS-2
came along. So while the BOM is now part of all relevant specifications,
it is still "Microsoft crap".

> For more details, see:
> http://www.unicode.org/faq/utf_bom.html#BOM

"some higher level protocols", "can be useful" - not
"is inherent part of all byte-level encodings".

Regards,
Martin


From davecook at nowhere.net  Fri Feb  4 03:46:36 2005
From: davecook at nowhere.net (Dave Cook)
Date: Fri, 04 Feb 2005 08:46:36 GMT
Subject: advice needed for simple python web app
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
Message-ID: <slrnd06djf.kc5.davecook@localhost.localdomain>

On 2005-02-04, Dan Perl <danperl at rogers.com> wrote:

> I have a pretty simple python script and I would like to turn it into a web 
> application but web apps are a domain I know very little about.  I know that 
> Twisted, CherryPy, Plone and Zope exist but not exactly what they do.  I 

I think CherryPy is the lightest and easiest if you need a built-in server.
I was impressed by its intuitiveness, though I don't really like the default
templating system.

I'm using Nevow (slick!) and Twisted now, but you pay for the flexiblility
with a steep learning curve, and lack of documentation and API stability are
an issue with Nevow.

Inspired by an example on Bruce Eckel's blog, I tried writing a web app with
only the server that comes with the standard lib, but it was just too hard
for me to build an app starting from that low a level. The frameworks help a
lot here.

Dave Cook



From kartic.krishnamurthy at gmail.com  Mon Feb  7 14:02:13 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 7 Feb 2005 11:02:13 -0800
Subject: socket question
In-Reply-To: <pan.2005.02.07.17.48.10.131474@philippecmartin.com>
References: <mailman.2089.1107796309.22381.python-list@python.org>
	<36pm9uF53qlqdU1@individual.net>
	<pan.2005.02.07.17.48.10.131474@philippecmartin.com>
Message-ID: <1107802933.017870.84480@g14g2000cwa.googlegroups.com>


Philippe C. Martin wrote:
> >> My problem is that I cannot connect to my server if the client is
not on
> >> the same PC (although I'm doing the above).


Does the machine running the server code also have a firewall installed
that blocks access to the server port from outside? That is the only
possibility I can think of that prevents a non-local client from
connecting.

Also, please do a netstat -a on the machine running the server and see
the IP addresses to which the listening port is bound.

Thanks,
-Kartic



From steven.bethard at gmail.com  Sat Feb  5 18:50:40 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 05 Feb 2005 16:50:40 -0700
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <1gribme.1b8vjvuz98jhkN%aleaxit@yahoo.com>
References: <dvOMd.33656$EG1.19314@lakeread04>
	<xqCdnQlfh-iEJ57fRVn-sw@comcast.com>
	<1gribme.1b8vjvuz98jhkN%aleaxit@yahoo.com>
Message-ID: <UZqdnQBkO7hRxpjfRVn-3w@comcast.com>

Alex Martelli wrote:
> Steven Bethard <steven.bethard at gmail.com> wrote:
> 
> 
>>Here's a solution that works for iterables other than lists:
>>
>>py> def collapse(iterable):
>>...     enumeration = enumerate(iterable)
>>...     _, lastitem = enumeration.next()
>>...     yield lastitem
>>...     for i, item in enumeration:
>>...         if item != lastitem:
>>...             yield item
>>...             lastitem = item
>>...
>>py> lst = [0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5]
>>py> list(collapse(lst))
>>[0, 1, 2, 3, 2, 4, 5]
>>
>>Again, I'm still not sure I'd call this more elegant...
> 
> 
> Hmmmm, what role does the enumeration play here?

None =) Sorry, it was an accidental carry-over from the list solution 
that looked at lst[i-1].  I thought about correcting it when I realized 
this (after posting), but I was too lazy. ;)

Steve


From thomas at thomas-lotze.de  Mon Feb 28 19:39:13 2005
From: thomas at thomas-lotze.de (Thomas Lotze)
Date: Tue, 01 Mar 2005 01:39:13 +0100
Subject: accessor/mutator functions
References: <slrnd25qu6.cvr.nick@irishsea.home.craig-wood.com>
	<m2wtssl88h.fsf@unique.fully.qualified.domain.name.yeah.right>
	<pan.2005.02.28.23.08.23.223910@dalkescientific.com>
	<m2mztokzxo.fsf@unique.fully.qualified.domain.name.yeah.right>
Message-ID: <pan.2005.03.01.00.39.13.16769@ID-174572.user.uni-berlin.de>

Dan Sommers wrote:

> I think I'd add a change_temperature_to method that accepts the target
> temperature and some sort of timing information, depending on how the rest
> of the program and/or thread is structured.

But then you put application logic into a library function. Doing this
consistently leads to a monster of a library that tries to account for all
possible applications. Where does this leave the KISS principle?

> In the case of simply reading the current temperature, and not knowing
> what's inside that device driver, I'd still lean away from exposing a
> current temperature attribute directly.  I think part of my thinking comes
> from my old Pascal days, when it made me cringe to think that "x:=b;"
> might actually execute a subroutine rather than just copy some memory
> around.

Then you also avoid lists, dicts and, ironically, methods. Accessing
methods means to access a callable attribute, after all, with all the
stuff going on behind the scenes on attribute access.

-- 
Thomas




From a at a.invalid  Wed Feb  2 20:07:57 2005
From: a at a.invalid (Timo Virkkala)
Date: Thu, 03 Feb 2005 01:07:57 GMT
Subject: Newbie alert
In-Reply-To: <mailman.1781.1107387840.22381.python-list@python.org>
References: <mailman.1781.1107387840.22381.python-list@python.org>
Message-ID: <NPeMd.583$Pe5.288@read3.inet.fi>

Valone, Toren W. wrote:
> Traceback (most recent call last):
>   File "C:/Python24/dialog1.py", line 29, in -toplevel-
>     d = MyDialog(root)
> NameError: name 'MyDialog' is not defined

Suggestion: Read the place in your code where MyDialog is defined and compare it 
with where it is used. Check case. You'll find the problem :)

--
Timo Virkkala


From fredrik at pythonware.com  Sat Feb 12 03:42:41 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 12 Feb 2005 09:42:41 +0100
Subject: sre is broken in SuSE 9.2
References: <mailman.2299.1108029731.22381.python-list@python.org><1108060527.378911.146240@o13g2000cwo.googlegroups.com><420D4D9A.40201@v.loewis.de>
	<cuke1o$fo4$1@news.comcor-tv.ru>
Message-ID: <cukfdn$ttq$1@sea.gmane.org>

Serge Orlov wrote:

> The wide-character value for each member of the Portable
> Character Set will equal its value when used as the lone character
> in an integer character constant. Wide-character codes for other
> characters are locale- and *implementation-dependent*
>
> Emphasis is mine.

the relevant part for this thread is *locale-*.  if wctype depends on the
locale, it cannot be used for generic build.  (custom interpreters are an-
other thing, but they shouldn't be shipped as "python").

</F> 





From rory at campbell-lange.net  Tue Feb 15 16:35:09 2005
From: rory at campbell-lange.net (Rory Campbell-Lange)
Date: Tue, 15 Feb 2005 21:35:09 +0000
Subject: Newbie question about class operator overloading
In-Reply-To: <20050215174336.GA24104@campbell-lange.net>
References: <20050215174336.GA24104@campbell-lange.net>
Message-ID: <20050215213509.GB22648@campbell-lange.net>

Anyone out there?

Criticism about the objective of my question, not just the execution,
gratefully received!

Basically, if I have a

    class This:
        def __init__(self, x, y):
            self.x=x
            self.y=y
            self.data = {}

and then make all my setitem and getitem calls refer to self.data; is it
sensible and right to be able to refer to self.data[n]?

Rory

On 15/02/05, Rory Campbell-Lange (rory at campbell-lange.net) wrote:
> Hi. I'm just starting to use python.
> 
> I am anxious about how best to set and access items one level down in a
> data structure if I am using __setitem__ and __getitem__.
> 
> At the moment I can do
> 
> for a data structure Data:
> 
>     object.Data = { 'one' : [1, 2, {}, 4],
>                     'two' : [5, 6, {}, 8]}
> 
> I can use normal __setitem__ and __getitem__ to address Data keys very
> easily
> 
> However, if I wish to access object.Data['one'][0] for instance, I am
> using the following:
> 
> object['three'] = [0, 'val0'] # set
> x =  object['three'][0]       # get
> 
> Is this advisable? I'm worried the syntax is very odd.
> 
> Extract from an example class:
> 
> 	def __setitem__ (self,key,value): 
> 		if type(value) == list and type(value[0]) == int:
> 			if key not in self.data:
> 				self.data[key] = {} 
> 			self.data[key][value[0]] = value[1]
> 		else:
> 			self.data[key] = value
> 
> 	def __getitem__ (self,key,value=None): 
> 		if not value==None:
> 			return self.data[key][value]
> 		else:
> 			return self.data[key]

-- 
Rory Campbell-Lange 
<rory at campbell-lange.net>
<www.campbell-lange.net>


From danperl at rogers.com  Fri Feb  4 01:28:04 2005
From: danperl at rogers.com (Dan Perl)
Date: Fri, 4 Feb 2005 01:28:04 -0500
Subject: advice needed for simple python web app
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
	<7xr7jxnddh.fsf@ruckus.brouhaha.com>
	<OqCdnWO5h9_ynp7fRVn-uA@rogers.com>
	<1107495895.697731.183550@z14g2000cwz.googlegroups.com>
Message-ID: <cOKdnYqexLhkiJ7fRVn-ug@rogers.com>


"Michele Simionato" <michele.simionato at gmail.com> wrote in message 
news:1107495895.697731.183550 at z14g2000cwz.googlegroups.com...
> Dan Perl:
>> The application is just something I'm playing with to learn a little
> bit on
>> web apps.  It uses an HTML form to send an email.  The form takes
> inputs
>> like the From:, To: and Subject: fields and a text field.
>
> It is difficult to beat CGI + CGIHTTPServer for conceptual simplificity
> and easy of use: however, Quixote comes close and it has a *much*
> better support for forms.

So Quixote is another framework I will have to look into.  Best of all, 
though, after adding Quixote to the list I decided I have enough words to do 
a search.  There were a few interesting finds, but one single link that 
points to the best of them is: 
http://www.python.org/moin/WebProgrammingShootOut 




From pramode at gmail.com  Sun Feb  6 05:26:02 2005
From: pramode at gmail.com (Pramode C E)
Date: Sun, 6 Feb 2005 15:56:02 +0530
Subject: Python scripts a PC Interfacing equipment
Message-ID: <d87da83305020602261f070066@mail.gmail.com>

Hello,

The Phoenix project aims to bring low cost PC-based experimental
Physics to the classroom. Read a short intro here:

http://linuxgazette.net/111/pramode.html


Regards,
Pramode
---------------


From deetsNOSPAM at web.de  Thu Feb 17 11:20:17 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Thu, 17 Feb 2005 17:20:17 +0100
Subject: difference between class methods and instance methods
References: <pan.2005.02.17.07.04.37.907754@yahooz.com>
	<Xns96005FE3164DAduncanrcpcouk@127.0.0.1>
	<1119g2rre5g610c@corp.supernews.com>
Message-ID: <37juh3F5d511mU1@individual.net>

John wrote:
> ... hmm... bound methods get created each time you make
> a call to an instance method via an instance of the given class?

No, they get created when you create an actual instance of an object. So
only at construction time. Creating them means taking the unbound method
and binding the created object as first argument to the method. Thus each
instance of a class Foo with a method bar has its own instance of bar - the
bound method bar. But only one per object. 


-- 
Regards,

Diez B. Roggisch


From removethis.kartic.krishnamurthy at gmail.com  Thu Feb 24 07:53:21 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Thu, 24 Feb 2005 12:53:21 GMT
Subject: email-adress
In-Reply-To: <mailman.2994.1109239615.22381.python-list@python.org>
References: <mailman.2994.1109239615.22381.python-list@python.org>
Message-ID: <57kTd.37997$H05.3401@twister.nyroc.rr.com>

Courtis Joannis said the following on 2/24/2005 5:06 AM:
> Hello Python-team,
> 
> please could you delete my email-adress from your mailing list.
> 
> Thanks Joannis
> 

Courtis

On emails sent to the python mailing list, the signature should contain 
an unsubscribe email address. Please follow instructions on the 
signature to unsubscribe.

Or else visit http://mail.python.org/mailman/listinfo/python-list to 
unsubscribe yourself.

If you are talking about "unsubscribing" from c.l.p, you will have to 
change the settings on your service provider if it is web based (e.g. 
with Google groups you can choose whether or not to receive emails).

Thanks,
-Kartic


From hancock at anansispaceworks.com  Sat Feb 19 00:57:52 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Fri, 18 Feb 2005 23:57:52 -0600
Subject: Variables.
In-Reply-To: <614c778e.0502160134.6bd72448@posting.google.com>
References: <614c778e.0502150429.1a2a4d8d@posting.google.com>
	<614c778e.0502160134.6bd72448@posting.google.com>
Message-ID: <200502182357.52675.hancock@anansispaceworks.com>

On Wednesday 16 February 2005 03:34 am, administrata wrote:
> sry, I mean the problem is... about lining
> 
> it doesn't look like this...
> 
> Allen woke up early in the morning. But, it was unusal by Allen.
> Allen's pillow was with Allen. Allen didn't want to wake up But, Allen
> tried my best and woke up. it was so amazing
> -- 
> http://mail.python.org/mailman/listinfo/python-list

In a triple-quoted string, newlines are significant.

Compare:

>>>
>>> my_text1 = """
...                     first line of text
...                     second line of text
...                     third line of text
...                     """
>>>
>>> my_text2 = ("first line of text "
...                     "second line of text "
...                     "third line of text")
>>>
>>> print my_text1
 
                    first line of text
                    second line of text
                    third line of text
                     
>>> print my_text2
first line of text second line of text third line of text
>>>

Note that strings that appear together without punctuation are concatenated
*before* byte-compiling, whereas using "+" creates code to concatenated the
strings.  This will rarely matter, but it means that the idiom above is completely
equivalent to a long string on a single line, which is probably what you wanted.

You need the parentheses to tell Python that the expression is not complete,
so it won't throw a syntax error when you go to the next line.

There are also more sophisticated ways of processing text, of course -- study the
"textwrap" module, for example.

Cheers,
Terry



--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From fredrik at pythonware.com  Thu Feb  3 09:44:13 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 3 Feb 2005 15:44:13 +0100
Subject: test msg
References: <1107440430.276966.318580@z14g2000cwz.googlegroups.com>
Message-ID: <cttdaa$q2d$1@sea.gmane.org>

rickysarraf at gmail.com wrote:

> tes tmsg

if you meant to send this to a test group, it didn't work.  complain to
your provider.

</F> 





From alanmk at hotmail.com  Sun Feb 13 13:15:56 2005
From: alanmk at hotmail.com (Alan Kennedy)
Date: Sun, 13 Feb 2005 18:15:56 +0000
Subject: connecting to Sybase/MsSQL from python
In-Reply-To: <OJcPd.4065$aW6.3986@newssvr22.news.prodigy.net>
References: <OJcPd.4065$aW6.3986@newssvr22.news.prodigy.net>
Message-ID: <mLMPd.47438$Z14.33089@news.indigo.ie>

[John Fabiani]
> I'm hoping someone on the list has connected to sybase/MsSQL with something
> that works with DBAPI 2.0 from a linux box (SUSE 9.2) because I can't seem
> to get it done.  I found Object Craft's python code that uses FreeTDS.  But
> I can't get it compiled.  The code is looking for "sybdb.h" (first error) -
> of course I don't have "sybdb.h".  It is not in Object Crafts code nor in
> the FreeTDS source.  I'm guessing that I need sybase develop lib's but I
> don't know where they are to be found.  

Hmmm, google("sybdb.h source", submit="I'm feeling Lucky")

lands on

http://www.freetds.org/reference/a00337.html

which has a GPL licence declaration on the top, so it seems that the 
FreeTDS have an OSS version available.

If your compile is failing because it cannot find the file, perhaps you 
neglected to run "./configure" before starting the compile?

http://www.freetds.org/userguide/config.htm

> So is there a kind sole out there that can help with instructions on what is
> needed to get python talking to MsSQL.

Sorry, can't help you there, haven't used FreeTDS.

But I hate to see questions being asked a *second* time without some 
form of reasonable answer .....

As already mentioned by another poster, have you considered using ODBC? 
There are several python ODBC implementations.

HTH,

-- 
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan


From python-url at phaseit.net  Wed Feb  9 06:08:03 2005
From: python-url at phaseit.net (Craig Ringer)
Date: Wed, 09 Feb 2005 11:08:03 GMT
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Feb  9)
Message-ID: <cucodb$g0b$1@lairds.us>

QOTW:  "Such infrastructure building is in fact fun and instructive -- as
long as you don't fall into the trap of *using* such complications in
production code, where Python's simplicity rules;-)." -- Alex Martelli
    http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/41a6c0e1e260cd72/

"C++ to Python is a steep 'unlearning' curve..." -- Philip Smith

"URK -- _my_ feeling is that we have entirely *too many* options for
stuff like web application frameworks, GUI toolkits, XML processing,
..." -- Alex Martelli
    http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/a9bdc98acb5acae4/

"We should concentrate on *real* problems, ones that exist in real code,
not ones that mostly exist in wild-eyed prose that consists of
predictions of pain and death that conspicuously fail to occur, no matter
how many times they are  repeated or we are exhorted to heed them or face
our doom." -- Jeremy Bowers
    http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/a75da70b0845b6fe/


Special thanks this week to Dean Goodmanson for his help identifying
several items.

    The Online Computer Library Center contest is open.  It
    closes May 15.  Among the usual C++ and Java languages, Python
    also is available for selection:
        http://www.oclc.org/research/researchworks/contest/default.htm#guidelines       

    Baoqui Chi runs into a documented, but easily overlooked, trap
    in the handling of __del__ methods and receives good advice on
    better fixes:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/13ec343eb0a37247/

    Steve Holden explains how to think about bytecode management:
       http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/59c0466111b075b8/
    in a conversation aimed at Pyro improvement.

    Michael Tobis sparks off a discussion on the underlying nature
    of generators and offers a caution on jumping to conclusions
    about the writings of non-native English speakers:
        http://mail.python.org/pipermail/python-list/2005-January/263448.html

    Derek finds out that the Python interpereter is smarter about
    finding resources than it lets on:
        http://mail.python.org/pipermail/python-list/2005-January/263473.html

    irc.freenode.net #python is overcrowded: the entrance now
    routes to #python-cleese or #python-gilliam:
        http://divmod.org/users/washort/python-split.htmlmklm

    Steve Holden provides an evocative illustration that the rules
    are there for a reason, even if breaking them doesn't hit you
    (*ahem*) immediately:
        http://mail.python.org/pipermail/python-list/2005-February/263851.html

    In response to a question about rewriting exceptions to include
    more information, Stefan Behnel gets a couple of rather useful
    answers:
        http://mail.python.org/pipermail/python-list/2005-February/263843.html

    Netcraft Reports 33K Zope servers in January, 55K in February!
        http://mail.zope.org/pipermail/zope-announce/2005-February/001651.html

    Joakim Stork discovers that thanks to classes being first class
    objects in Python, sometimes the best solution is so simple it's
    often possible to miss it entirely:
        http://mail.python.org/pipermail/python-list/2005-February/263891.html

    Someone posts an interesting attempt at a cross-platform way to
    discover the user's home directory:
        http://mail.python.org/pipermail/python-list/2005-February/263921.html

    Metaclasses are handy things. Steven Bethard demonstrates a nice
    simple use case:
        http://mail.python.org/pipermail/python-list/2005-February/264037.html

    As John Machin demonstrates, generating SQL in Python doesn't
    have to be ugly:
        http://mail.python.org/pipermail/python-list/2005-February/264248.html

========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Brett Cannon continues the marvelous tradition established by 
    Andrew Kuchling and Michael Hudson of intelligently summarizing
    action on the python-dev mailing list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    The Python Business Forum "further[s] the interests of companies
    that base their business on ... Python."
	http://www.python-in-business.org

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    deli.cio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topics/pythonurl/         
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.




From peter at engcorp.com  Thu Feb 24 23:55:18 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 24 Feb 2005 23:55:18 -0500
Subject: Trace exceptions
In-Reply-To: <mailman.3034.1109305355.22381.python-list@python.org>
References: <mailman.3034.1109305355.22381.python-list@python.org>
Message-ID: <hL2dnR1hGKQrMoPfRVn-ow@powergate.ca>

gf gf wrote:
> Is there anyway to do something like this:
> 
> try:
>      ...
> except Exception:
>      print the Exception message (and maybe other
> info)

import traceback
traceback.print_exc()

See the docs on that module for how that works and many
other possibilities.

-Peter


From deetsNOSPAM at web.de  Mon Feb 14 07:42:24 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 14 Feb 2005 13:42:24 +0100
Subject: nested lists as arrays
References: <1108384089.804375.179130@f14g2000cwb.googlegroups.com>
Message-ID: <37bklfF5a7s7vU2@individual.net>

benjamin.cordes at blawrc.de wrote:

> Hi,
> 
> why can't I do this:
> 
>         dummy = self.elements[toy][tox]
> 
>         self.elements[toy][tox] = self.elements[fromy][fromx]
>         self.elements[fromy][fromx] = dummy
> 
> after initialising my nested list like this:
> 
>        self.elements = [[0 for column in range(dim)] for row in
> range(dim) ]

Works for me:

dim = 10
elements = [[0 for column in xrange(dim)] for row in
xrange(dim) ]

toy, tox = (2,5)
fromy, fromx = (7,5)

dummy =elements[toy][tox]
elements[toy][tox] = elements[fromy][fromx]
elements[fromy][fromx] = dummy


And use xrange instead of range.
-- 
Regards,

Diez B. Roggisch


From rbt at athop1.ath.vt.edu  Fri Feb 18 13:14:28 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Fri, 18 Feb 2005 13:14:28 -0500
Subject: re.compile and very specific searches
Message-ID: <cv5ba4$nvn$1@solaris.cc.vt.edu>

Is it possible to use re.compile to exclude certain numbers? For 
example, this will find IP addresses:

ip = re.compile('\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}')

But it will also find 999.999.999.999 (something which could not 
possibly be an IPv4 address). Can re.compile be configured to filter 
results like this out?


From mcfletch at rogers.com  Fri Feb 18 14:20:25 2005
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Fri, 18 Feb 2005 14:20:25 -0500
Subject: Probably over my head... Trying to get Font Names
In-Reply-To: <JpydncCe2to2sovfRVn-og@adelphia.com>
References: <B8KdneiuyLaKoYjfRVn-vQ@adelphia.com>	<mailman.2786.1108689703.22381.python-list@python.org><8oydnSIY04Xby4jfRVn-iA@adelphia.com>	<mailman.2810.1108749030.22381.python-list@python.org>
	<JpydncCe2to2sovfRVn-og@adelphia.com>
Message-ID: <42163FF9.8070608@rogers.com>

Samantha wrote:

>Mike,
>Not sure why that email bounced.
>  
>
That last one bounced too, btw.

>I downloaded these files:
>WinTTX2.0b1.exe
>TTFQuery-1.0.0.win32.exe
>numarray-1.1.1.win32-py2.4.exe
>
>They all seemed to install. Is WinTTX2.0b1.exe not the fontTools file?
>  
>
I believe WinTTX is a font-editing program from which fontTools was 
split out into a separate project.

As well, though I don't *know* that this will cause problems, I'd 
thought fontTools required Numeric (Numpy) rather than Numarray.  Would 
try the fontTools package first with the Numarray you've installed, and 
if you then find problems with it not being able to find Numeric, 
install the Numpy release.

HTH,
Mike

________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com
                              PyCon is coming...



From ncoghlan at iinet.net.au  Thu Feb 17 09:26:41 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 18 Feb 2005 00:26:41 +1000
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <4214A543.2000006@swiftdsl.com.au>
References: <37hippF4gcimiU1@individual.net><qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com><37hqlrF59l2b2U1@individual.net><873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>	<421450CC.9080504@swiftdsl.com.au>	<mailman.2744.1108629122.22381.python-list@python.org>
	<4214A543.2000006@swiftdsl.com.au>
Message-ID: <4214A9A1.4020307@iinet.net.au>

news.sydney.pipenetworks.com wrote:
> I'm not sure if this has been raised in the thread but I sure as heck 
> always convert my join arguments using str(). When does someone use 
> .join() and not want all arguments to be strings ? Any examples ?

When the list argument already contains only strings, conversion is redundant.

Anyway, automatic conversion of the argument list elements *was* tried around 
August of last year, despite some concerns about it being too magical. However, 
the interaction between string, unicode, subclasses of same, __str__, __repr__, 
__unicode__ and everything else made it impossible to come up with behaviour 
that was clearly 'better' than the status quo (every idea we considered ended up 
resulting in quirky behaviour at some point), so things never progressed to a 
formal patch.

The explicit use of map() or LC was kept as the least bad of the available options.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From xifxif at gmail.com  Mon Feb 28 08:57:06 2005
From: xifxif at gmail.com (Xif)
Date: 28 Feb 2005 05:57:06 -0800
Subject: How do you control _all_ items added to a list?
Message-ID: <1109599026.828317.297700@z14g2000cwz.googlegroups.com>

Hi

I want to have control over all items added to a list.

The first attempt was to subclass list and override its .append()
method.

Problem is, there are plenty of other ways the list can have items
added to it - e.g. extend, insert - and theyr'e not at all affected by
the changes I made to append.

Is there some "base" item-adding method that all other item-adding
methods use, so I can override it and have the changes affect all
item-adding functions?

Thanks,
Xif



From sjmachin at lexicon.net  Wed Feb 16 14:54:43 2005
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 17 Feb 2005 06:54:43 +1100
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net>
Message-ID: <qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>

On 16 Feb 2005 18:47:21 GMT, Leo Breebaart <leo at lspace.org> wrote:


>
>What I can't find an explanation for is why str.join() doesn't
>automatically call str() on its arguments, so that e.g.
>str.join([1,2,4,5]) would yield "1245", and ditto for e.g.
>user-defined classes that have a __str__() defined.
>

For a start, I think you meant ''.join([1,2,4,5]) to yield "1245".

Secondly, concatenating arbitrary types with a null separator doesn't
appear to be a good use case.
E.g.
>>> ''.join([str(x) for x in [1,2,1./3,4]])
'120.3333333333334'

Some possible explanations:

1. Explicit is better than implicit.
2. It would only be a good "trick" IMHO with a non-null separator and
types with a 'clean' str() result (unlike float) -- like int; I can't
think of more at the moment.
3. It would be one step on the slippery downwards path to perlishness.
4. For consistency, would you like "1" + 2 to produce "12"?




From sjmachin at lexicon.net  Sun Feb 20 02:44:32 2005
From: sjmachin at lexicon.net (John Machin)
Date: Sun, 20 Feb 2005 18:44:32 +1100
Subject: exercise: partition a list by equivalence - merge_JM.py (0/1)
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<1108814276.680736.264380@l41g2000cwc.googlegroups.com>
	<37pb5jF5fnfivU1@individual.net>
	<1108856859.576211.178480@l41g2000cwc.googlegroups.com>
	<1108864587.304465.87100@g14g2000cwa.googlegroups.com>
Message-ID: <jcfg119kotlr3ktcg06a8u2f39mo6e5hpc@4ax.com>

On 19 Feb 2005 17:56:27 -0800, bearophileHUGS at lycos.com wrote:

>John Machin>FWIW, here's a brief UAT report:
>
>Here is something else for you.
>Note: for more correct comparisons, for the following tests I've
>disabled the use of Psyco in Graph (usually enabled, if present).
>This looks faster than merge2 for this (quite sparse) random pairs
>test:

[snip]

>
>Timings using clock() (much more reliable than the profilers!), for
>xMax, nPairs = 2000, 10000:
>merge2: 1.222
>merge6: 0.201
>
>Probably merge6 can be improved, reducing memory used...

Perhaps I'm missing a posting of yours -- what are merge2 and merge4?
What is "this random pairs test"? What is xMax (nPairs isn't hard to
guess), and how are you generating your input data?

FWIW, my offering is attached.



From caleb1 at telkomsa.net  Sun Feb  6 22:43:40 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Sun, 06 Feb 2005 22:43:40 -0500
Subject: newbie wants to compile python list of filenames in selected
	directories
References: <36n60uF520lfaU1@individual.net>
Message-ID: <opsls5y2ld1js0xs@news.telkomsa.net>

Hi Anthony

Here is some stuff to get you started (this is from memory, I'm not  
checking it, but should be mostly helpful):

***
import os

os.chdir('C:\My Documents')  # Can use this to jump around to different  
folders
fileNames = os.listdir('.')  # Checks the now current folder
namesToMatch = ['readme.txt','readme.doc'] # Buncha names to find

for item in fileNames:  # check every filename
   if item in namesToMatch:  # is this item in the required list?
     print 'Match found: '+item  # if you found one, say so.
***

Hope this helps.
Caleb




On Sun, 06 Feb 2005 18:29:34 +0000, anthonyberet <nospam at me.invalid> wrote:

> Hi, I am new at Python, and very rusty at the one language I was good  
> at, which was BASIC.
>
> I want to write a script to compare filenames in chosen directories, on  
> windows machines. Ideally it would compose a list of strings of all the  
> filenames in the directories, and those directories would be chosable by  
> the user of the script.
>
> I am quite happy to do my own legwork on this , I realise it is simple  
> stuff, but can anyone point me in the right direction to start?
>
> Thanks



From bill.mill at gmail.com  Fri Feb  4 14:00:30 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Fri, 4 Feb 2005 14:00:30 -0500
Subject: newbie: Syntax error
In-Reply-To: <TrPMd.13383$3W3.8066@bignews4.bellsouth.net>
References: <TrPMd.13383$3W3.8066@bignews4.bellsouth.net>
Message-ID: <797fe3d40502041100259f06d1@mail.gmail.com>

Chad,

try "elif tries == 2" or just "else:". You are not allowed to put an
expression after an else statement.

I recommend you read the python tutorial at
http://docs.python.org/tut/tut.html .

Peace
Bill Mill
bill.mill at gmail.com


On Fri, 4 Feb 2005 12:49:51 -0600, Chad Everett <everettcc at hotmail.com> wrote:
> Hi Everyone,
> 
> I am new to Python and programming in general.  I bought the book "Python
> Programming for the Absolute Beginner" by michael Dawson.
> 
> I have been working through it but am having trouble.
> I am trying to make a coin flip program and keep geting a Synax Error
> "invalid syntax".
> 
> If anyone has a moment could you please look at it and tell me what I am
> doing wrong.
> 
> thanks for your time and patience.
> 
> Chad
> 
> # Coin Flip Program
> # This program flips a coin 100 times and tells the number of heads and
> tails.
> # Chad Everett 2/3/2005
> 
> print "\t\t********Coin Flip Game*********\n"
> import random
> 
> # heads = 1
> # tails = 2
> 
> tries = random.randrange(2) + 1
> count = 1
> 
> while count != 100:
>     if tries == 1:
>         heads = 1
>         count += 1
> 
>     else tries == 2:  # I AM GETTING THE SYNTAX ERROR HERE
>         tails = 1
>         count += 1
> 
> print "heads: " + heads
> print "tails: " + tails
> 
> raw_input("Press enter to quit")
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From sschwarzer at sschwarzer.net  Mon Feb  7 17:12:46 2005
From: sschwarzer at sschwarzer.net (Stefan Schwarzer)
Date: Mon, 07 Feb 2005 23:12:46 +0100
Subject: Problems with python and threads under Freebsd
References: <mailman.2101.1107803855.22381.python-list@python.org>
Message-ID: <cu8p1f$g9n$1@online.de>

snacktime wrote:
> I am consistantly getting seg faults and bus errors when running a
> multi threaded python application under 5.3-release-p2.  Python was
> built from the port(python 2.4) with threading enabled.

I had similar problems some time ago. The solution/workaround was to remove
the threading library-related mappings from /etc/libmap.conf . Perhaps you
need to do that or the opposite, i. e. add a mapping.

What do you get if you run the threading tests
in /usr/local/lib/python2.4/test/test_thread*.py ? In my case,
test_threaded_import.py failed before the libmap.conf change.

If the libmap.conf change doesn't help, you could try to rebuild the base
system and kernel and after that the Python port. Also, reading the
UPDATING files for the base system and the ports tree may give you a hint.

Stefan



From kenneth.m.mcdonald at sbcglobal.net  Mon Feb 14 19:03:05 2005
From: kenneth.m.mcdonald at sbcglobal.net (Kenneth McDonald)
Date: Tue, 15 Feb 2005 00:03:05 GMT
Subject: DHTML control from Python?
References: <140220051355142173%kenneth.m.mcdonald@sbcglobal.net>
	<opsl7jxcz26yt6e7@news.cisco.com>
Message-ID: <140220051803075043%kenneth.m.mcdonald@sbcglobal.net>

In article <opsl7jxcz26yt6e7 at news.cisco.com>, aurora <aurora00 at gmail.com> wrote:

What are the win 32 modules? Searching "OS X win 32" on Google gave me a bit
too much...

Thanks,
Ken

> IE should be able to do that. Install the win32 modules. Then you should  
> simply embed Python using <script language='python'>. Not sure about Mac.  
> Even on Windows your audiences are limited to those who have  
> IE+python+win32 modules.
> 
> 
> > Are there any ways to use Python (rather than JavaScript) for  
> > controlling DHTML? I don't mind writing
> > JavaScript stubs which can be called by Python, so long as I need to do  
> > so only once for a particular
> > feature. I'm running Mac OS X 10.3, so comments as to the best browser  
> > for testing this would also be
> > appreciated.
> >
> > If you could also email as well as posting a reply, I'd be grateful.
> >
> > email to : kenneth.m.mcdonald _at_ sbcglobal.net
> >
> > Thanks,
> > Ken McDonald
>


From duncan.booth at invalid.invalid  Mon Feb  7 07:15:46 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 7 Feb 2005 12:15:46 GMT
Subject: Get importer module from imported module
References: <mailman.2058.1107773305.22381.python-list@python.org>
	<Xns95F67153AE259duncanrcpcouk@127.0.0.1>
	<mailman.2062.1107776648.22381.python-list@python.org>
Message-ID: <Xns95F67CB7E70AEduncanrcpcouk@127.0.0.1>

dody suria wijaya wrote:

> "import a" inside b would not solve the problem, since there
> are many "module a" and module b does not know beforehand
> which module had imported it.

Ok, I understand now what you are trying to achieve, but there isn't any 
concept relating a module back to the first module which tried to import 
it. Instead you'll have to specify the relationship yourself.

How about this:

> #Module c
import sys
food_no = sys.argv[1]
m = __import__(food_no)
goodie = b.Salty(m)

> #Module b
...
def Salty(module):
    class Food(SaltyMixIn,module.Main): pass
    return Food()
...

In fact, it looks like the importing isn't really something module c should 
be concerned about. I haven't tested the following code (so it will have 
bugs), but it should give you some ideas. It remembers classes it has 
created so as not to duplicate them, and it also gives each class a 
sensible name.

> #Module c
import sys
food_no = sys.argv[1]
goodie = b.Salty(food_no)

> #Module b
...
import new
Classes = {}

def makeFood(classname, food, mixin):
    m = __import__(food)
    main = m.Main
    if (mixin, main) in Classes:
      return Classes[mixin, main]()

    newclass = new.classobj(classname + '_' + food, (mixin, main), {})
    Classes[mixin, main] = newclass
    return newclass
    

def Salty(food):
    return makeFood('Salty', food, SaltyMixIn)
...



From ncoghlan at iinet.net.au  Tue Feb 15 05:11:44 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Tue, 15 Feb 2005 20:11:44 +1000
Subject: [PATCH] allow partial replace in string.Template
In-Reply-To: <cuqf8v$uec$1@lnx107.hrz.tu-darmstadt.de>
References: <cuq0dl$opq$1@lnx107.hrz.tu-darmstadt.de>	<mailman.2525.1108384043.22381.python-list@python.org>
	<cuqf8v$uec$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <4211CAE0.8080903@iinet.net.au>

Stefan Behnel wrote:
> 
> 
> Nick Coghlan wrote
> 
>> a) Patches are more likely to be looked at if placed on the SF patch 
>> tracker.
> 
> 
> see your own b), I wanted to discuss them first.

Fair enough.

> Still, when I first tried out the Template class, I immediately stumbled 
> over the fact that the substitute methods always return strings, and 
> never Template objects. While it makes sense for their primary purpose, 
> it totally restricts the usage of this module to one-show operations.

Except that it is easy to turn a string into a template using a constructor. . .

However, now that I think more about your 'partial_substitute' method it does 
make sense as an alternative constructor:

   @classmethod
   def from_template(*args, **kwds):
     cls, orig = args[:2]
     return cls(orig.safe_substitute(*args[2:], **kwds))

Usable as:
   new_templ = Template.from_template(orig_templ, *args, **kwds)

Versus:
   new_templ = Template(orig_templ.safe_substitute(*args, **kwds))

Mutating the template in place seems questionable. Rebinding the name with the 
above constructor would be more appropriate, IMO.

Hmm - I'm unconvinced, but it's probably still worth posting a patch and sending 
it in Barry Warsaw's direction.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From jonas at freesources.org  Tue Feb 22 12:22:42 2005
From: jonas at freesources.org (Jonas Meurer)
Date: Tue, 22 Feb 2005 18:22:42 +0100
Subject: display VARCHAR(mysql) and special chars in html
In-Reply-To: <3807siF5g9t1cU1@individual.net>
References: <mailman.2900.1109014601.22381.python-list@python.org>
	<3807siF5g9t1cU1@individual.net>
Message-ID: <20050222172241.GB4769@resivo.mejo.net>

On 22/02/2005 Radovan Garabik wrote:
> > i could write a function to parse the comment and substitute special
> > chars with the relevant html code, but maybe this already exists in some
> > module?
> 
> just make the page in utf-8, and you'll save you a lot of troubles

ok, how do i do this? simply add a second line with this:?
# -*- encoding: utf-8 -*-

i use utf8 locales on my machine anyway.

> > if not, it'll be hard work, as i've to consider many special chars, and
> > at least iso-8859-1* and utf-8 as charmaps.
> 
> if you insist...
> a = u'\u010c'
> a.encode('ascii', 'xmlcharrefreplace')

this fails as the comment contained several chars that couldn't be
converted.

i've changed my plans, and now will transform the comments to html
before saving them in mysql. this way, the comment never contains
special chars except they weren't filtered out when safed in mysql.

do any filters exist, to transform plain text to html? otherwise i might
use third-party products, as text2html.

what do you think?

bye
 jonas


From mhuffnagle at knowtechnology.net  Tue Feb  8 09:56:03 2005
From: mhuffnagle at knowtechnology.net (Marc Huffnagle)
Date: Tue, 08 Feb 2005 14:56:03 GMT
Subject: Basic file operation questions
In-Reply-To: <1107846197.701686.303390@l41g2000cwc.googlegroups.com>
References: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
	<opsllt9r191js0xs@news.telkomsa.net>
	<mailman.1808.1107431422.22381.python-list@python.org>
	<ctt53b$l5u$00$1@news.t-online.com>
	<opslnm1cge1js0xs@news.telkomsa.net>
	<ctu62q$gud$04$1@news.t-online.com>
	<1107846197.701686.303390@l41g2000cwc.googlegroups.com>
Message-ID: <7q4Od.753$Sd.170775@newshog.newsread.com>

When you read a file with that method, is there an implied close() call 
on the file?  I assume there is, but how is that handled?

Caleb Hattingh wrote:
> Peter, that was very clear, thanks.
> 
> 
>>So not only is
>>
>>for line in file(...):
>>   # do stuff
>>
>>the most elegant, it is also the fastest. file.readlines() comes
> 
> close, but
> 
>>is only viable for "small" files.
> 
> 

      Marc


From deetsNOSPAM at web.de  Thu Feb 17 08:14:08 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Thu, 17 Feb 2005 14:14:08 +0100
Subject: Help needed for to build a CGI shell interface.
References: <mailman.2755.1108644567.22381.python-list@python.org>
Message-ID: <37jjk4F5eefr4U1@individual.net>

Slalomsk8er wrote:

> I don't get it with the popen (popen3 or subprocess).
> 
> 1. How do I establish my pipes?
> 
> 2. And how do I interact with the pipes (interactive CGI-page)?

There are plenty of python + http frameworks out there - from simple
cgi-like ones like mod_python to full fledged app servers like zope. As
usual, google is your friend. No need to dig into the things you mentioned
above - at least not for what you want to do right now.
-- 
Regards,

Diez B. Roggisch


From jaydonnell at gmail.com  Mon Feb  7 18:17:42 2005
From: jaydonnell at gmail.com (jdonnell)
Date: 7 Feb 2005 15:17:42 -0800
Subject: PHP Embedded In Python
In-Reply-To: <1107814685.908990.58410@z14g2000cwz.googlegroups.com>
References: <1107814685.908990.58410@z14g2000cwz.googlegroups.com>
Message-ID: <1107818262.741563.266050@c13g2000cwb.googlegroups.com>

I'm not sure exactly what your trying to do, but I use php and python
together a lot. I usually call the python script from php with the
passthru function like this:

<?php
$outputFromPy = passthru('/path/to/myScript.py');
?>



From maxm at mxm.dk  Thu Feb 17 04:49:16 2005
From: maxm at mxm.dk (Max M)
Date: Thu, 17 Feb 2005 10:49:16 +0100
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <slrnd18lvg.9ng.nick@irishsea.home.craig-wood.com>
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<37hqlrF59l2b2U1@individual.net>
	<873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<slrnd18lvg.9ng.nick@irishsea.home.craig-wood.com>
Message-ID: <421467ca$0$295$edfadb0f@dread12.news.tele.dk>

Nick Craig-Wood wrote:
> Nick Vargish <nav+posts at bandersnatch.org> wrote:

> Why not have another method to do this?  I propose joinany which will
> join any type of object together, not just strings

 >>> l = [1,2,3,'four']
 >>> ','.join(map(str, l))
'1,2,3,four'

Is this really that hard to do, that you want it in the library?

-- 

hilsen/regards Max M, Denmark

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


From samantha7395 at hotmail.com  Fri Feb 18 22:42:20 2005
From: samantha7395 at hotmail.com (Samantha)
Date: Fri, 18 Feb 2005 19:42:20 -0800
Subject: Probably over my head... Trying to get Font Names
References: <B8KdneiuyLaKoYjfRVn-vQ@adelphia.com>
	<3269a8ba.0502181149.275ca26f@posting.google.com>
Message-ID: <lbednSWDhp0AKIvfRVn-uA@adelphia.com>

Thank you Pierre, that worked. I am still going to try and get the 
TTFQuery+Fonttools to work just out of curiosity.
Thanks again to everyone!!!
S

"Pierre Quentel" <quentel.pierre at wanadoo.fr> wrote in message 
news:3269a8ba.0502181149.275ca26f at posting.google.com...
> "Samantha" <samantha7395 at hotmail.com> wrote in message 
> news:<B8KdneiuyLaKoYjfRVn-vQ at adelphia.com>...
>> I am attempting to extract the Font Names from the installed windows 
>> fonts.
>> I am having a heck of a time getting these rather than the file names.
>> Examples can be seen by going to Control Panel > Fonts
>>
>> Any help or direction is appreciated.
>> S
>
> Try this :
>
> Python 2.3.2 (#49, Oct  2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)] on 
> win32
> Type "help", "copyright", "credits" or "license" for more information.
>>>> from Tkinter import Tk
>>>> import tkFont
>>>> root=Tk()
>>>> print tkFont.families(root) 




From steve at holdenweb.com  Wed Feb  2 18:26:16 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 02 Feb 2005 18:26:16 -0500
Subject: global variables
In-Reply-To: <1107385488.822768.317250@l41g2000cwc.googlegroups.com>
References: <1107385488.822768.317250@l41g2000cwc.googlegroups.com>
Message-ID: <ApdMd.102646$Jk5.97323@lakeread01>

alex wrote:

> Hi,
> 
> is it possible to create 'global' variables that can be seen in all
> other classes?
> 
> Alex
> 
Not sensibly, though you can mess around with the __builtin__ namespace 
to make values accessible without qualification.

The usual solution is to maintain a config module that establishes 
default settings for configuration variables. Other modules that import 
config can access (and change) those values using

   config.name = value

and so on. Hope this help.

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From phil at freehackers.org  Tue Feb  1 06:10:47 2005
From: phil at freehackers.org (Philippe Fremy)
Date: Tue, 01 Feb 2005 12:10:47 +0100
Subject: Python's idiom for function overloads
In-Reply-To: <tyfoef4mw2u.fsf@pcepsft001.cern.ch>
References: <mailman.1677.1107230965.22381.python-list@python.org>
	<41ff066c$0$6473$636a15ce@news.free.fr>
	<tyfoef4mw2u.fsf@pcepsft001.cern.ch>
Message-ID: <41ff63bb$0$21348$636a15ce@news.free.fr>


> Frequently, in Python, code which checks for types, rather than
> checking for features, ends up being excessively restrictive and
> insufficiently general.

That's true, but checking for the exact features that are going to be 
needed by your code is usually quite complicated and painful to 
maintain. At the beginning, you need only a sequence. In the end, you 
need a mutable sequence that supports slicing, so you could go by 
requiring a list as well.

Enforcing types also brings the benefit that the program is more 
deterministic. In my experience, there is a lot more benefits to have an 
object whose type is clearly identified than to have function that 
accepts generic objects.

I would go as far as saying that variables should have immutable types. 
It is more restricting that what python provides currently, but leads to 
clearer programming practice: the intent of the developer shows up in 
the type he uses.

Of course, with languages such as OCaml, you get both of it: liberal 
typing with enforced consistency.

While Python's dynamic typing liberty is enjoyable, I think it harms 
when you start to work on big projects. It prevents you to put many 
safety assumptions which might bite you back.

	regards,

	Philippe


From sjmachin at lexicon.net  Thu Feb  3 21:03:30 2005
From: sjmachin at lexicon.net (John Machin)
Date: 3 Feb 2005 18:03:30 -0800
Subject: how to generate SQL SELECT pivot table string
In-Reply-To: <1107475373.064794.155030@l41g2000cwc.googlegroups.com>
References: <1107475373.064794.155030@l41g2000cwc.googlegroups.com>
Message-ID: <1107482610.883260.21660@o13g2000cwo.googlegroups.com>

McBooCzech wrote:
> Hallo all,
>
> I am trying to generate SQL SELECT command which will return pivot
> table. The number of column in the pivot table depends on the data
> stored in the database. It means I do not know in advance how many
> columns the pivot table will have.
>
> For example I will test the database as following:
> SELECT DISTINCT T1.YEAR FROM T1
>
> The SELECT command will return:
> 2002
> 2003
> 2004
> 2005
>
> So I would like to construct following select:
>
> select T1.WEEK,
> SUM (case T1.YEAR when '2002' then T1.PRICE else 0 END) Y_02,
> SUM (case T1.YEAR when '2003' then T1.PRICE else 0 END) Y_03,
> SUM (case T1.YEAR when '2004' then T1.PRICE else 0 END) Y_04,
> SUM (case T1.YEAR when '2005' then T1.PRICE else 0 END) Y_05
> from T1
> group by T1.week
>
> which will return pivot table with 5 columns:
> WEEK, Y_02, Y_03, Y_04, Y_05,
>
> but if the command "SELECT DISTINCT T1.YEAR FROM T1" returns:
> 2003
> 2004
>
> I have to construct only following string:
>
> select T1.WEEK,
> SUM (case T1.YEAR when '2003' then T1.PRICE else 0 END) Y_03,
> SUM (case T1.YEAR when '2004' then T1.PRICE else 0 END) Y_04,
> from T1
> group by T1.week
>
> which will return pivot table with 3 columns:
> WEEK, Y_03, Y_04
>
> Can anyone help and give me a hand or just direct me, how to write a
> code which will generate SELECT string depending on the data stored
in
> the database as I described?

>>> step1result = ["2003", "2004"] # for example
>>> prologue = "select T1.WEEK, "
>>> template = "SUM (case T1.YEAR when '%s' then T1.PRICE else 0 END)
Y_%s"
>>> epilogue = " from T1 group by T1.week"
>>> step2sql = prologue + ", ".join([template % (x, x[-2:]) for x in
step1result]) + epilogue
>>> step2sql
"select T1.WEEK, SUM (case T1.YEAR when '2003' then T1.PRICE else 0
END) Y_03, SUM (case T1.YEAR when '2004' then T1.PRICE else 0 END) Y_04
from T1 group by T1.week"
>>>

Of course you may need to adjust the strings above to allow for your
local SQL syntax (line breaks, line continuations, semicolon at the end
maybe, ...).

A few quick silly questions:
Have you read the Python tutorial?
Do you read this newsgroup (other than answers to your own questions)?
Could you have done this yourself in a language other than Python?



From nospam at nospam.fr  Fri Feb 11 17:02:14 2005
From: nospam at nospam.fr (jean-michel)
Date: Fri, 11 Feb 2005 23:02:14 +0100
Subject: goto, cls, wait  commands
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
	<cuhpa6$oou$1@news.tiscali.fr> <110q581greo8g9e@corp.supernews.com>
Message-ID: <cuj9qj$p86$1@news.tiscali.fr>


"Jeff Shannon" <jeff at ccvcorp.com> a ?crit dans le message de
news:110q581greo8g9e at corp.supernews.com...
> jean-michel wrote:
>
> > Hi all,
> > I saw a lot of comments saying GOTO is not usefull, very bad, and we
> > should'nt use it because we don't need it.
> > I think that's true, but only if you *create* programs.
> > But if the goal is to provide some kind of converter to automatically
take
> > an old application written with an old language (using GOTO), and
generating
> > python code, it would certainly a great help to have this (unclean)
feature
> > in native python.
>
> But an automatic translator is certain to be imperfect.  One can no
> more translate mechanically between computer languages than one can
> translate mechanically between human languages -- and we've all seen
> the fun that can be had by machine-translating from language A ->
> language B -> language A, right?  What do you think the effect of that
> sort of meaning-drift would be on application code?
>
> In other words, any translation from one language to another will
> require significant human attention, by someone familiar with both
> languages, to ensure that the original meaning is preserved as close
> as possible.  You're going to have to rewrite chunks of code by hand
> no matter what you do; it'd be silly to *not* take that opportunity to
> purge things like GOTO.
>
> Jeff Shannon
> Technician/Programmer
> Credit International
>

The automated translations are very commonly used actually in computing
industry. If you want an overview, you can try "legacy migration" in google
for instance (or "as400 automated migration" or anything of that kind).
Translate a computer's language is not the same at all than to translate a
human language. In the first case, you have a good chance to know all the
rules. Even if the work is not perfect, it can offer you a chance to
continue to use a 10000 programs application without having to rewrite all
(several years of work indeed).
The last time I did that, I converted arround 6000 cobol programs in a
couple of months, which is obviously not possible by hand (thanks to python
;-). And it was not possible to remove GOTO, because that would really need
to rewrite manually the programs, that means to entirely redo the
application (probably a 20 human years work !).

Regards,
jm




From jaydonnell at gmail.com  Wed Feb 16 12:17:33 2005
From: jaydonnell at gmail.com (jdonnell)
Date: 16 Feb 2005 09:17:33 -0800
Subject: Getting milliseconds in Python
In-Reply-To: <1108571009.698970.152020@z14g2000cwz.googlegroups.com>
References: <1108565135.167562.196830@z14g2000cwz.googlegroups.com>
	<37h5epF5ck38lU2@individual.net>
	<1108571009.698970.152020@z14g2000cwz.googlegroups.com>
Message-ID: <1108574253.319468.50680@z14g2000cwz.googlegroups.com>

"This is no good, I am looking for milliseconds, not seconds.. as
stated
above. "

The docs are not very clear. I had the same issue when I was trying to
do the same thing, but the time and datetime modules return
milliseconds on my linux machines.



From ajs at ajs.com  Fri Feb 11 16:11:14 2005
From: ajs at ajs.com (Aaron Sherman)
Date: Fri, 11 Feb 2005 16:11:14 -0500
Subject: [perl-python] text pattern matching, and expressiveness
References: <1107802850.999843.260520@c13g2000cwb.googlegroups.com>
	<Xns95F6917BFEEF4castleamber@130.133.1.4>
Message-ID: <cuj72q$jpd$1@domitilla.aioe.org>

John Bokma wrote:
> Xah Lee wrote:

>>Perl is a language of syntactical variegations. Python on the other
>>hand, does not even allow changes in code's indentation, but its
>>efficiency and power in expression, with respect to semantics (i.e.
>>algorithms), showcases Perl's poverty in specification.

> Clarify :-D.

Well, I think it's pretty clearly troll-bait. Semantics != algorithms 
and Perl (just like Python) has no such poverty WRT specification.

Sounds like someone who learned Python and forgot that it wasn't a 
religion. Too bad, but a disease unique to no particular language. Perl, 
Python, Ruby, C, APL, LISP... they've all had their unpleasant zealots.


From xah at xahlee.org  Fri Feb 11 18:02:52 2005
From: xah at xahlee.org (Xah Lee)
Date: 11 Feb 2005 15:02:52 -0800
Subject: [perl-python] 20050211 generating expression by nested loops
Message-ID: <1108162972.047914.20780@l41g2000cwc.googlegroups.com>

# -*- coding: utf-8 -*-
# Python

# David Eppstein of the Geometry Junkyard fame gave this elegant
# version for returing all possible pairs from a range of n numbers.

def combo2(n):
    return dict([('%d,%d'%(i+1,j+1),(i+1,j+1)) for j in range(n) for i
in range(j)])
print combo2(5)

# this construct uses a irregular syntax to generate a expression
# built by nested loops.  Semantically, this expression generation is
# akin to applying a function to a tree. Morons in the computing
# industry and academia like to call this "list comprehension".

# In Python, this syntax irregularity works like this, for example:

# double each number from 1 to 5
myExpression = [ i*2 for i in range(1,6)]
print myExpression

# built a list of couples of the form (n*2,n*3)
myExpression = [ (i*2,i*3) for i in range(1,6)]
print myExpression

# in general the this expression generating syntax has the form
# [<expression> <iteration>]

# the iteration part can be nested.
myExpression = [ (i,j) for i in range(1,6) for j in range(1,4)]
print myExpression

# remember, this jargonized "list comprehension" is nothing more
than
# a irregular syntax for building a expression from nested loops.  Its
# purpose is primarily of syntactical convenience. Advanced languages
# such as functional languages often have this power without the
# syntax irregularity.

# For Python's official tutorial on this topic, see
# http://python.org/doc/tut/node7.html


#---------

# Perl does not contain facilities to generate expressions based on
# trees. Of course, one can just do with for loops. One can however
# write a function that are syntactically more succinct in generating
# expression thru trees than the so-called "list comprehension"),
See
# http://xahlee.org/PerlMathematica_dir/perlMathematica.html
# look for the function named Table.

his is Perl-Python a-day. To subscribe, see
http://xahlee.org/perl-python/python.html

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From cdieterich at geosci.uchicago.edu  Thu Feb  3 10:37:06 2005
From: cdieterich at geosci.uchicago.edu (Christian Dieterich)
Date: Thu, 3 Feb 2005 09:37:06 -0600
Subject: Reinstall python 2.3 on OSX 10.3.5?
In-Reply-To: <ctsl83$s1q$1@news1.ucsd.edu>
Message-ID: <75AE83E2-75F9-11D9-8525-000A9582377C@geosci.uchicago.edu>


On D?ardaoin, Feabh 3, 2005, at 01:52 America/Chicago, Robert Kern 
wrote:

> Christian Dieterich wrote:
>> On D? C?adaoin, Feabh 2, 2005, at 17:48 America/Chicago, 
>> moa at extrapolation.com wrote:
>>> Hi there
>>>
>>> I started a very long and roundabout process of attempting to install
>>> python 2.3.4 along side my apple-installed 2.3 system. To make a long
>>> story short, I have completely confabulated my environment ( i 
>>> deleted
>>> the 2.3 binaries and so forth from the system in an attempt to start
>>> things fresh), and now I cannot figure out how to reinstall the base
>>> 2.3 Apple python distribution.
>>> Can somebody please point me in the right direction?
>> You could use
>> fink install python
>> which makes you a Python installation under /sw.
>
> But that doesn't solve his problem, which is to restore the 
> Apple-supplied Python that he deleted.

Agreed. I was not aware that the preinstalled Python differs from a 
normal one.

I implicitely assumed he would link /usr-Python to /sw-Python, and then 
continue using fink for not to interfere with /usr anymore.

Christian



From philippecmartin at sbcglobal.net  Tue Feb  8 11:55:28 2005
From: philippecmartin at sbcglobal.net (Philippe C. Martin)
Date: Tue, 08 Feb 2005 10:55:28 -0600
Subject: broke tkinter
Message-ID: <1107881728.14574.21.camel@localhost>

Hi,

I decided to clean my system and rebuild python from scratch.

I downloaded tk8.4.9, tcl8.4.9 and Python2-4.tar.bz2.

I installed tcl then tk using './configure --prefix=/usr'

tkcvs is now working OK


trying to compile python (configure = './configure --prefix=/usr', I get
this:


In file included
from /home/philippe/downloaded/Python-2.4/Modules/_tkinter.c:67:
/usr/include/tk.h:337: error: syntax error before "CONST84"
In file included from /usr/include/tk.h:1576,

from /home/philippe/downloaded/Python-2.4/Modules/_tkinter.c:67:

Any clue!

Regards,

Philippe


-- 
***************************
Philippe C. Martin
SnakeCard LLC
www.snakecard.com
***************************



From aahz at pythoncraft.com  Tue Feb 15 11:29:14 2005
From: aahz at pythoncraft.com (Aahz)
Date: 15 Feb 2005 11:29:14 -0500
Subject: Kill GIL
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<mailman.2502.1108343142.22381.python-list@python.org>
	<cup0p7$c9s$1@panix2.panix.com> <4211e287@duster.adelaide.on.net>
Message-ID: <cut80q$osd$1@panix2.panix.com>

In article <4211e287 at duster.adelaide.on.net>,
Adrian Casey  <news at outbacklinux.com> wrote:
>Aahz wrote:
>> In article <mailman.2502.1108343142.22381.python-list at python.org>,
>> Frans Englich  <frans.englich at telia.com> wrote:
>>>
>>>Personally I need a solution which touches this discussion. I need to run
>>>multiple processes, which I communicate with via stdin/out,
>>>simultaneously, and my plan was to do this with threads. Any favorite
>>>document pointers, common traps, or something else which could be good to
>>>know?
>> 
>> Threads and forks tend to be problematic.  This is one case I'd recommend
>> against threads.
>
>Multiple threads interacting with stdin/stdout?  I've done it with 2
>queues.  One for feeding the threads input and one for them to use
>for output.  In fact, using queues takes care of the serialization
>problems generally associated with many threads trying to access a
>single resource (e.g. stdout).  Python Queues are thread-safe so you
>don't have to worry about such issues.

The problem is that each sub-process really needs its own stdin/stdout.
Also, to repeat, forking tends to be problematic with threads.  Finally,
as Peter implied, I'm well-known on c.l.py for responding to thread
problems with, "Really?  Are you using Queue?  Why not?"  However, this
is one case where Queue can't help.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From alex at fortworks.com  Thu Feb 17 21:23:42 2005
From: alex at fortworks.com (imphasing)
Date: 17 Feb 2005 18:23:42 -0800
Subject: Using open() inside a subroutine
In-Reply-To: <42154859$0$44652$a1866201@visi.com>
References: <1108690572.599238.61820@c13g2000cwb.googlegroups.com>
	<42154859$0$44652$a1866201@visi.com>
Message-ID: <1108693422.308610.136160@z14g2000cwz.googlegroups.com>

DUH. Thanks.
can't beleive I missed that one...

Alex



From bjourne at gmail.com  Thu Feb  3 17:38:11 2005
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Thu, 3 Feb 2005 23:38:11 +0100
Subject: About standard library improvement
In-Reply-To: <4kuMd.102708$Jk5.100022@lakeread01>
References: <mailman.1831.1107455790.22381.python-list@python.org>
	<4kuMd.102708$Jk5.100022@lakeread01>
Message-ID: <740c3aec0502031438769e393c@mail.gmail.com>

The process seem slow. I've submitted two patches and haven't gotten
any response so far, but it has only been three weeks. Other patches
seem to be idling for months. I'm not complaining, just want to know
why the process is so slow and what you can do when you submit
patches/bug reports to speed it up?

-- 
mvh Bj?rn


From tom at dtsam.com  Thu Feb 24 10:05:37 2005
From: tom at dtsam.com (Thomas Bartkus)
Date: Thu, 24 Feb 2005 09:05:37 -0600
Subject: rounding problem
References: <gu6dnWNLB-FHuoDfRVn-tA@comcast.com>
	<pan.2005.02.24.03.50.24.914208@comcast.net>
	<1109221152.118191.136510@f14g2000cwb.googlegroups.com>
Message-ID: <F6SdnWbnaqaacIDfRVn-tA@telcove.net>

"Dan Bishop" <danb_83 at yahoo.com> wrote in message
news:1109221152.118191.136510 at f14g2000cwb.googlegroups.com...
> tom wrote:
<snip>
> > That last digit will *always* contain some arithmetic slop.
>
> Your statement is misleading, because it suggests that your processor
> stores digits.  It doesn't; it stores *bits*.

Your explanation is much clearer and more than I knew. And I am sorry you
found my statement a bit misleading. But I never implied details about how
things were stored internally.

No matter what computer, calculater, slide rule or programming language - a
floating point number will always exhibit "arithmetic slop" at the last
significant digit. This is a property inherent to floating point numbers and
has nothing to do with how it is stored on any machine.

Thomas Bartkus




From jussij at zeusedit.com  Mon Feb  7 10:07:40 2005
From: jussij at zeusedit.com (Jussi Jumppanen)
Date: Tue, 08 Feb 2005 02:07:40 +1100
Subject: ANN: Zeus Programmers Editor V3.94
Message-ID: <4207843C.26FB@zeusedit.com>

The latest release of the Zeus for Windows programmer's
editor is now available.

This latest version comes with code folding for the C#,
C/C++, D, Fortran, Lua, Python, Perl, Java, Java Script
and Visual Basic languages.

For more details vist:

   http://www.zeusedit.com/features.html

or to test drive the fully functional shareware use the
link below:

   http://www.zeusedit.com/download.html  (5.2 Mega Byte)

Jussi Jumppanen
http://www.zeusedit.com


From siona at chiark.greenend.org.uk  Thu Feb 10 13:02:10 2005
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 10 Feb 2005 18:02:10 +0000 (GMT)
Subject: turing machine in an LC
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
	<s9zvf93ovp8.fsf@salmakis.intevation.de>
	<pan.2005.02.08.12.47.00.135408@jerf.org>
	<36vm80F554hv7U1@individual.net>
Message-ID: <MEC*OHUGq@news.chiark.greenend.org.uk>

Greg Ewing  <greg at cosc.canterbury.ac.nz> wrote:
>As a fellow named Church once pointed out, lambdas are really
>*all* you need in a language...

... where as others argue that it is impractical not to have
some form of runtime data storage, thereby giving rise to the
separation of Church and state.

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From ilias at lazaridis.com  Mon Feb 14 07:09:12 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Mon, 14 Feb 2005 14:09:12 +0200
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <37bel6F59jvkgU1@individual.net>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108370491.792820.142200@z14g2000cwz.googlegroups.com>
	<cuprg2$6rt$1@usenet.otenet.gr> <37bcdkF5bg7knU1@individual.net>
	<cupumi$kfs$1@usenet.otenet.gr> <37bel6F59jvkgU1@individual.net>
Message-ID: <cuq4d6$fqp$1@usenet.otenet.gr>

Diez B. Roggisch wrote:
>>>Where does that requirement come from? If you want to create large
>>>scale apps, the price for a msvc++ compiler shouldn't matter. And:
>>>Windows is a non-free platform at first. If you have to or want to
>>>develop on top of it, be prepared to pay. Its as simple as that. If
>>>you want something cheaper - you'll have to put some effort into it.
>>>Or use linux.
>>
>>I will not go into this 'twisting' games.
> 
> Because it renders your point moot?

no, my requirement renders your 'twisting' 'moot'.

see next line.

>>the requirement "Use of an open-source tool-chain" is nothing special.
> 
> There is a OS-tool-chain supported on windows, cygwin. 

this depends on cygwin.dll, which is GPL licensed

[or am I wrong?]

additionally: i like to use MinGW.

>>MinGW is not "every imaginable platform/compliler".
> 
> Certainly not - but its one more dependency on an otherwise perfectly
[...] - (twisting)

again twisting.

I have a simple requirement.

please do not ignore it.

>>I'm not intrested in creating an distribution.
> 
> Obviously nobody else is. 

Including the Python Foundation.

>>I provide an analysis of the situation, context: newcomer, disapointed
>>from JAVA.
> 
> That doesn't belong here. You don't get points for not liking java.
[...] - (off topic)

[Python Foundation/Community can use this, to attract more users.
The analysis is not the main topic here.]

An essential requirement is the topic.

>>>>c) Why are the following efforts not _directly_ included in the
>>>>python source code base?
>>>>
>>>>http://jove.prohosting.com/iwave/ipython/pyMinGW.html
> 
> Ask the author of the patch. We can't read minds here.

you are right, this can clarify at least the one side.

I've contacted him, see my post in the root of this thread.

.

-- 
http://lazaridis.com


From aurora00 at gmail.com  Mon Feb 14 17:11:26 2005
From: aurora00 at gmail.com (aurora)
Date: Mon, 14 Feb 2005 14:11:26 -0800
Subject: DHTML control from Python?
References: <140220051355142173%kenneth.m.mcdonald@sbcglobal.net>
Message-ID: <opsl7jxcz26yt6e7@news.cisco.com>

IE should be able to do that. Install the win32 modules. Then you should  
simply embed Python using <script language='python'>. Not sure about Mac.  
Even on Windows your audiences are limited to those who have  
IE+python+win32 modules.


> Are there any ways to use Python (rather than JavaScript) for  
> controlling DHTML? I don't mind writing
> JavaScript stubs which can be called by Python, so long as I need to do  
> so only once for a particular
> feature. I'm running Mac OS X 10.3, so comments as to the best browser  
> for testing this would also be
> appreciated.
>
> If you could also email as well as posting a reply, I'd be grateful.
>
> email to : kenneth.m.mcdonald _at_ sbcglobal.net
>
> Thanks,
> Ken McDonald



From news at NOwillmcguganSPAM.com  Sun Feb 27 07:00:48 2005
From: news at NOwillmcguganSPAM.com (Will McGugan)
Date: Sun, 27 Feb 2005 12:00:48 +0000
Subject: Googlewhacker
Message-ID: <4221b671$0$8752$db0fefd9@news.zen.co.uk>

Hi folks,

Has anyone seen 'Googlewhack Adventure'?

http://www.davegorman.com/googlewhack.htm

I wrote a script to generate Googlewhacks - thought I'd share it with 
you. I'd better stop running it as I fear Google may ban my IP for 
making 20 searches a seconds..


Will McGugan

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From pobrien at orbtech.com  Sat Feb  5 09:22:08 2005
From: pobrien at orbtech.com (Pat)
Date: 5 Feb 2005 06:22:08 -0800
Subject: IDLE history, Python IDE, and Interactive Python with Vim
References: <opsllommgvb1cml1@ashot>
Message-ID: <1107613328.046467.97330@g14g2000cwa.googlegroups.com>

Ashot wrote:
> This is sort of both Python and Vim related (which is why I've posted
to
> both newsgroups).
>
> Python related:
> ----------------------
> I have been frustrated for quite some time with a lack of a history
> command in IDLE (in fact with IDLE in general).  Often I'll develop
new
> code at the command line, testing each line as I go.  Currently I
have to
> copy and paste, removing outputs and the ">>>" at each line.
> Is it perhaps possible to make some kind of hack to do this (dump a
> command history)?
>
> Idle in general isn't that great IMO, so I was wondering also if
there are
> better alternatives out there?  What do people use mostly?  I've
tried
> something called pyCrust, but this too didn't have history and some
other
> things I was looking for.

PyCrust is only a shell, not a full-blown IDE, so it likely lacks
things that you were looking for.  But it certainly does have history,
multi-line command recall, and cut/paste options with and without the
leading prompts.  In fact, the default Copy command (Ctrl+C) strips out
the prompts, and the Copy Plus command (Shift+Ctrl+C) retains the
prompts.  If you select the Session tab you'll see the entire command
history, without prompts and without the responses from the Python
interpreter.  Here are some other keybindings:

>>> shell.help()

* Key bindings:
Home              Go to the beginning of the command or line.
Shift+Home        Select to the beginning of the command or line.
Shift+End         Select to the end of the line.
End               Go to the end of the line.
Ctrl+C            Copy selected text, removing prompts.
Ctrl+Shift+C      Copy selected text, retaining prompts.
Ctrl+X            Cut selected text.
Ctrl+V            Paste from clipboard.
Ctrl+Shift+V      Paste and run multiple commands from clipboard.
Ctrl+Up Arrow     Retrieve Previous History item.
Alt+P             Retrieve Previous History item.
Ctrl+Down Arrow   Retrieve Next History item.
Alt+N             Retrieve Next History item.
Shift+Up Arrow    Insert Previous History item.
Shift+Down Arrow  Insert Next History item.
F8                Command-completion of History item.
                  (Type a few characters of a previous command and
press F8.)
Ctrl+Enter        Insert new line into multiline command.
Ctrl+]            Increase font size.
Ctrl+[            Decrease font size.
Ctrl+=            Default font size.
>>>

Hope that helps.

Pat

--
Patrick K. O'Brien
Orbtech    http://www.orbtech.com
Schevo     http://www.schevo.org
Pypersyst  http://www.pypersyst.org



From me at privacy.net  Mon Feb 28 18:49:39 2005
From: me at privacy.net (Dan Sommers)
Date: 28 Feb 2005 18:49:39 -0500
Subject: accessor/mutator functions
References: <slrnd25qu6.cvr.nick@irishsea.home.craig-wood.com>
	<m2wtssl88h.fsf@unique.fully.qualified.domain.name.yeah.right>
	<pan.2005.02.28.23.08.23.223910@dalkescientific.com>
Message-ID: <m2mztokzxo.fsf@unique.fully.qualified.domain.name.yeah.right>

On Mon, 28 Feb 2005 23:08:04 GMT,
Andrew Dalke <dalke at dalkescientific.com> wrote:

> On Mon, 28 Feb 2005 15:50:22 -0500, Dan Sommers wrote:
>> The reason their code is so inflexible is that they've filled their
>> classes with boiler plate get/set methods.
>> 
>> Why do users of classes need such access anyway?  If my class performs
>> useful functions and returns useful results, no user of my class should
>> care about its attributes.  If I "have to" allow access to my attributes
>> in order that my users be happy, then I did something else wrong when I
>> designed the class and its public interface in the first place.

> Consider an interface to a temperature controller.  It will
> have several properties:

>   - current temperature (read only)
>   - target temperature (read/write)
>   - various tuning parameters that affect the rate of change,
>      stability, etc.; eg, lookup details on a PID controller

> These are properties of the temperature controller object.
> In Python these properties are traditionally mapped to attributes.
> Under languages that don't have a __getattr__/"property" mechanism
> for separating interface from implementation these are implemented
> via get/set accessor methods.

> It is very often useful to change the temperature setting of
> a controller over time.  Eg, a chemical protocol might say
> "warm from 50 to 80 over a period of 30 minutes, 1 degree
> per minute".

> In Python that might be written as:

>   temp_controller = TemperatureController("/dev/com3")
>   temp_controller.target = 50
>   print "Bringing reactor to", temp_controller.target
>   while 1:
>     print "Current temperature is", temp_controller.current
>     if abs(temp_controller.current - temp_controller.target) < 0.1:
>       break
>     time.sleep(30)

>   raw_input("Insert sample and press the <enter> key: ")

>   for temp in range(51, 81):
>     print "Raising reactor temperature to", temp
>     temp_controller.target = temp
>     time.sleep(60)
>     if abs(temp_controller.current - temp) > 0.1:
>       print "Variance too high!", temp_controller.current

>   print "DONE!"


> What's wrong with the use of attributes in this case and how
> would you write your interface?

I think I'd add a change_temperature_to method that accepts the target
temperature and some sort of timing information, depending on how the
rest of the program and/or thread is structured.  It might turn into two
or three methods, depending on whether I can afford to block while
waiting, or what kind of intermediate feedback and/or error handling I
want (or one method with some carefully chosen default arguments).  I
don't know how that device driver works, but it might look something
like this:

    def change_temperature_to( self, target, seconds_between_checks ):
        print 'target temperature:', target
        tell_the_device_to_change( )
        while 1:
            current = read_the_temperature_from_the_device( )
            print 'current temperature:', current
            if abs( current - target ) < 0.1:
                break
            time.sleep( seconds_between_checks )

Obviously, that code is untested!  ;-)

In the case of simply reading the current temperature, and not knowing
what's inside that device driver, I'd still lean away from exposing a
current temperature attribute directly.  I think part of my thinking
comes from my old Pascal days, when it made me cringe to think that
"x:=b;" might actually execute a subroutine rather than just copy some
memory around.

I'm not saying that my applications *never* access my objects'
attributes directly, just that it's one of those things that raises at
least a yellow flag in my mind.

Regards,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>
?? ? ?? ? c? = 1


From ola.natvig at infosense.no  Tue Feb  8 10:33:57 2005
From: ola.natvig at infosense.no (Ola Natvig)
Date: Tue, 08 Feb 2005 16:33:57 +0100
Subject: Efficient checksum calculating on lagre files
Message-ID: <5o2nd2-5hl.ln1@pluto.i.infosense.no>

Hi all

Does anyone know of a fast way to calculate checksums for a large file. 
I need a way to generate ETag keys for a webserver, the ETag of large 
files are not realy nececary, but it would be nice if I could do it. I'm 
using the python hash function on the dynamic generated strings (like in 
page content) but on things like images I use the shutil's 
copyfileobject function and the hash of a fileobject's hash are it's 
handlers memmory address.

Does anyone know a python utility which is possible to use, perhaps 
something like the md5sum utility on *nix systems.


-- 
--------------------------------------
  Ola Natvig <ola.natvig at infosense.no>
  infoSense AS / development


From ncoghlan at iinet.net.au  Sun Feb 20 07:05:50 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 20 Feb 2005 22:05:50 +1000
Subject: unicode encoding usablilty problem
In-Reply-To: <42186016.7030309@v.loewis.de>
References: <opsmekm2ei6yt6e7@news.cisco.com>	<42164d01$0$4676$9b622d9e@news.freenet.de>	<opsme4lcjo6yt6e7@news.cisco.com>
	<42186016.7030309@v.loewis.de>
Message-ID: <42187D1E.5020709@iinet.net.au>

Martin v. L?wis wrote:
>> How about
>>
>>   b'' - 8bit string; '' unicode string
>>
>> and no automatic conversion.
> 
> 
> This has been proposed before, see PEP 332. The problem is that
> people often want byte strings to be mutable as well, so it is
> still unclear whether it is better to make the b prefix denote
> the current string type (so it would be currently redundant)
> or a newly-created mutable string type (similar to array.array).

Having "", u"", and r"" be immutable, while b"" was mutable would seem rather 
inconsistent.

If you want a phased migration to 'assert (str is unicode) == True', then PEP 
332 seems to have that covered:

1. Introduce 'bytes' as an alias of str
2. Introduce b"" as an alternate spelling of r""
3. Switch str to be an alias of unicode
4. Switch "" to be an alternate spelling of u""

Trying to intermingle this with making the bytes type mutable seems to be 
begging for trouble - consider how many string-keyed dictionaries would break 
with that change (the upgrade path is non-existent - you can't stay with str, 
because you want byte strings, but you can't go to bytes, because you need 
something immutable).

An alternative would be to have "bytestr" be the immutable type corresponding to 
the current str (with b"" literals producing bytestr's), while reserving the 
"bytes" name for a mutable byte sequence. That is, change PEP 332's upgrade path 
to look more like:

     * Add a bytestr builtin which is just a synonym for str. (2.5)
     * Add a b"..." string literal which is equivalent to raw string literals, 
with the exception that values which conflict with the source encoding of the 
containing file not generate warnings. (2.5)
     * Warn about the use of variables named "bytestr". (2.5 or 2.6)
     * Introduce a bytestr builtin which refers to a sequence distinct from the 
str type. (2.6)
     * Make str a synonym for unicode. (3.0)

And separately:
    * Introduce a bytes builtin which is a mutable byte sequence

Alternately, add array.bytes as a subclass of array.array, that provides a nicer 
API for dealing specifically with byte strings.

The main point being, the replacement for 'str' needs to be immutable or the 
upgrade process is going to be a serious PITA.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From s_t_a_n_i at yahoo.com  Sat Feb  5 22:01:07 2005
From: s_t_a_n_i at yahoo.com (http://www.stani.be)
Date: 5 Feb 2005 19:01:07 -0800
Subject: ANN: SPE 0.7.2.A IDE with uml, wxGlade and blender support
Message-ID: <1107658867.227923.209850@c13g2000cwb.googlegroups.com>

Spe is a python IDE with auto-indentation, auto completion, call tips,
syntax coloring, uml viewer, syntax highlighting, class explorer,
source index, auto todo list, sticky notes, integrated pycrust shell,
python file browser, recent file browser, drag&drop, context help, ...
Special is its blender support with a blender 3d object browser and its
ability to run interactively inside blender. Spe ships with wxGlade
(gui designer), PyChecker (source code doctor) and Kiki (regular
expression console). Spe is extensible with wxGlade.

The sidebar now features a file browser. I'm now trying to form a team
for future development of SPE. Besides me four people will join the
project:

    - Sam Widmer for CVS and bugfixes. So soon more collaboration on
SPE
      will be possible.
    - Nir Aides (author of rpdb) for helping implementing the remote
debugger
    - Kevin Walzer for the OS X Port of SPE. Please contact him for Mac
specific
      issues. Spe for the Mac will be distributed through:
      http://www.wordtech-software.com/spe.html
    - Jelle Feringa for documentation. The goal is to provide a pdf
manual with
      the SPE distribution based on the SPE wiki:
http://www.stani.be/spe/wiki
      Anyone who has comments or wants to edit the wiki as well can
contact Jelle.

If you like SPE, please contribute by coding, writing documentation or
donating. I would like to thank especially Michael Balk, who gave the
largest
donation ever to SPE.

Also I would like to thank Michael Foord, who made SPE part of a new
Python
distribution, called "movable python". It gives you the possibility to
carry your
favorite developping environment on a USB stick. So you can continue
your work on
any computer or test your modules for different python versions. This
distribution
opens a lot of new possibilities, check it out!! For more info, visit
http://www.voidspace.org.uk/python/programs.shtml#movpy

:Batteries included:
  - Kiki:
      Regular Expression (regex) console. For more info:
      http://project5.freezope.org/kiki/index.html
  - PyChecker:
      PyChecker is a tool for finding bugs in python source code. It
      finds problems that are typically caught by a compiler for
      less dynamic languages, like C and C++. It is similar to lint.
      For more info: http://pychecker.sourceforge.net
  - wxGlade:
      wxGlade is a GUI designer written in Python with the
      popular GUI toolkit wxPython, that helps you create
      wxWindows/wxPython user interfaces. As you can guess by the
      name, its model is Glade, the famous GTK+/GNOME GUI builder,
      with which wxGlade shares the philosophy and the look & feel
      (but not a line of code). For more info:
      http://wxglade.sourceforge.net

:New features:
    - sidebar browser (iniated by Attila Magyar)

:Bug fixes:
    - segfaults in Browser
    - indentation can now be different from 4
    - mac osx fixes for kiki, wxGlade & XRC
    - scrollbars of UML view
    - initial sizing and positioning are now restored

:Donations(177.20euro):
    - Michael Balk
    - Jason Powell
    - David Ko Feng
    - Winchell Chung
    - Matthias Haberkorn
    - Kristjan Kannike
    - Robert Cowham
    - Andre Roberge
    - Chris S

:Contributors:
  - Sam Widmer
  - Attila Magyar
  - Kevin Walzer
  - Thurston Stone

:Requirements:
  - full python 2.3+
  - wxpython 2.5.3.8+
  - optional blender 2.35+

:Links:
    - Homepage:     http://spe.pycs.net
    - Website:      http://projects.blender.org/projects/spe/
    - Screenshots:  http://spe.pycs.net/pictures/index.html
    - Forum:        http://projects.blender.org/forum/?group_id=30
    - RSS feed:     http://spe.pycs.net/weblog/rss.xml



From aisaac0 at verizon.net  Sat Feb 12 12:20:01 2005
From: aisaac0 at verizon.net (David Isaac)
Date: Sat, 12 Feb 2005 17:20:01 GMT
Subject: a sequence question
References: <lzrKd.138680$K7.56500@news-server.bigpond.net.au><Xns95EC9DCBC6294duncanrcpcouk@127.0.0.1>	<mailman.1553.1106960946.22381.python-list@python.org><WYXOd.16353$uc.1671@trnddc02>	<mailman.2388.1108127294.22381.python-list@python.org><Ft5Pd.26094$uc.8481@trnddc03>
	<mailman.2434.1108179260.22381.python-list@python.org>
Message-ID: <5VqPd.19723$uc.17393@trnddc08>


"Nick Coghlan" <ncoghlan at iinet.net.au> wrote in message
news:mailman.2434.1108179260.22381.python-list at python.org...
> A bug report on Sourceforge would help in getting the problem fixed for
the 2.5
> docs

Done.


> For the 'left-to-right' evaluation thing, that's technically an
implementation
> artifact of the CPython implementation, since the zip() docs don't make
any
> promises. So updating the docs to include that information would probably
be a
> bigger issue, as it involves behaviour which is currently not defined by
the
> library.

OK, thanks.

Alan Isaac




From michele.simionato at gmail.com  Mon Feb 21 12:30:20 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 21 Feb 2005 09:30:20 -0800
Subject: recommended way of generating HTML from Python
In-Reply-To: <4219d2a5$1_1@newspeer2.tds.net>
References: <1108889625.068929.88890@z14g2000cwz.googlegroups.com>
	<4218f506$0$1220$8fcfb975@news.wanadoo.fr>
	<1108965380.059565.200110@g14g2000cwa.googlegroups.com>
	<4219d2a5$1_1@newspeer2.tds.net>
Message-ID: <1109007020.958323.93140@z14g2000cwz.googlegroups.com>

Kent Johnson:
>I've written web pages this way (using a pretty nice Java HTML
generation package) >and I don't
>recommend it. In my experience, this approach has several drawbacks:
>- as soon as the web page gets at all complex, the conceptual shift
from HTML to >code and back is
>difficult.
>- It is hard to work with a designer. The designer will give you
sample web pages >which then have to
>be hand-translated to code. Changes to the web page have to be located
in the code.
>- There is no separation of content and presentation

>IMO templating systems are a much better solution. They let you
express HTML in >HTML directly; you
>communicate with a designer in a language the designer understands;
you can >separate content and
>presentation

You make a series of good points I am well aware of; however, still
there are
places were direct HTML generation can be a reasonable approach (my use
case was the formatting of a SQL query): cases where the result will
never
ever touch a designer. Also, one could argue that the designer should
not
get in touch with the HTML, but just play with the CSS.
Finally, you can achieve separation between logic and presentation just
putting the
routines generating the HTML pages in a separate module, no need to use
a
different language.

                Michele Simionato



From deetsNOSPAM at web.de  Sat Feb  5 14:04:29 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sat, 05 Feb 2005 20:04:29 +0100
Subject: Alternative to standard C "for"
References: <1107628331.816935.16760@o13g2000cwo.googlegroups.com>
Message-ID: <cu35bp$4rj$01$1@news.t-online.com>

> First case looks quite nasty, because it's for more complicated
> things, not numerical loops. Second is very nice, but with there's
> problem. If i do ..in range(1, 100000000).. (what I really need
> sometimes), it takes few hundred megs of memory and slows
> down. Are there other good ways for this simple problem? Generators?

Use xrange(). It computes the values as they are needed - not an entire
list.
-- 
Regards,

Diez B. Roggisch


From Scott.Daniels at Acm.Org  Tue Feb 22 10:52:09 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Tue, 22 Feb 2005 07:52:09 -0800
Subject: pydoc documentation- referred to Michele answer
In-Reply-To: <mailman.2931.1109072702.22381.python-list@python.org>
References: <mailman.2931.1109072702.22381.python-list@python.org>
Message-ID: <421b5112$1@nntp0.pdx.net>

Liat Koski wrote:
> Hellow Michele,
> This systax is working only with bulid in modules, like 'sys' for example
> But not for personal programs.
> Am i wrong??
> Can you please send me some syntax example you have? cause i'm getting syntax error that i don't know how to solve
> 
> Thanks
> Liat

Consider this:  You are the one with a problem.  You need to convince us
that you want a solution badly enough to try to find one, and you should
want to help us in our quest to answer your problem quickly.

I believe you have a problem.  I have no clue what your problem is.  You
are asking for syntax that works without showing syntax that doesn't
work, along with the _complete_ error messages that you get when you try
your syntax.  You seem to be asking for help without assisting your
rescuers.  You should be trying to make it easy for them.

Google for "smart questions".

--Scott David Daniels
Scott.Daniels at Acm.Org


From tego at adresu.nie.ma  Tue Feb  8 13:55:01 2005
From: tego at adresu.nie.ma (=?ISO-8859-1?Q?Maciej_Mr=F3z?=)
Date: Tue, 08 Feb 2005 19:55:01 +0100
Subject: Big development in the GUI realm
In-Reply-To: <4207c8db$0$21623$a1866201@visi.com>
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<4207c8db$0$21623$a1866201@visi.com>
Message-ID: <cub12p$pke$1@achot.icm.edu.pl>

Grant Edwards wrote:
> My understanding is that what you propose is not valid.  An EXE
> that uses a GPL'd DLL must be distributed according to the
> terms of the GPL.  Were that not the case, the LGPL would not
> have been needed.
> 

I believe this is the case only in simple situation where gpl-ed dll is 
_required_ to run exe or exe has some specific support code to work with 
gpl-ed dll.

However, imagine simple situation:
1. I write proprietary program with open plugin api. I even make the api 
itself public domain. Program works by itself, does not contain any 
GPL-ed code.
2. Later someone writes plugin using the api (which is public domain so 
is GPL compatible), plugin gets loaded into my software, significantly 
affecting its functionality (UI, operations, file formats, whatever).
3. Someone downloads the plugin and loads it into my program

They become effectively larger program, where one part is not GPL (which 
is exactly what GPL wants to avoid)
Am I bound by GPL? Certainly not, I did not sign or agree to it in way.
Is the plugin programmer bound by GPL in a way that prohibits writing 
GPL plugin to non-GPL program. Not sure, but I don't think so - plugin 
is based on API which is public domain
Is end user violating GPL? In the end this is when combining happens. I 
don't think so, in my understanding GPL only affects only the 
distribution - downloading the plugin means ability to obtain source 
code, but does not limit what you do with source as long as you do not 
redistribute any derivative works.

I think it does not really matter if plugin programmer and main program 
programmer are the same person/organization or not ... it might however 
get tricky if GPL plugin is distributed as part of main program.

Unfortunately, GPL faq is extremely vague on such border cases, instead 
of simple "yes/no" answers faq is filled with some advocacy talks ...

regards,
Maciej Mr?z


From caleb.hattingh at gmail.com  Wed Feb  9 01:46:34 2005
From: caleb.hattingh at gmail.com (Caleb Hattingh)
Date: 8 Feb 2005 22:46:34 -0800
Subject: Loop in list.
In-Reply-To: <mailman.2214.1107900378.22381.python-list@python.org>
References: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
	<3e8ca5c805020813074e975a4d@mail.gmail.com>
	<mailman.2214.1107900378.22381.python-list@python.org>
Message-ID: <1107931594.497916.321980@l41g2000cwc.googlegroups.com>

Hi Fredrik

*sigh*  I think I will stop writing mini-tutorials :)

You are, of course, correct.  And I really like your method of
explaining how to mentally juggle the LC into explicit loops.

I shudder to think how mnay people I confused with my incorrect
examples - I really should have tested them first.

Thanks again
Caleb

> (to translate a list comprehension to nested statements, remove
> the result expression, insert colons and newlines between the for/if
> statement parts, and put the append(result expression) part inside
> the innermost statement)
> 
> </F>



From ml at dynkin.com  Tue Feb  8 21:38:45 2005
From: ml at dynkin.com (George Yoshida)
Date: Wed, 09 Feb 2005 11:38:45 +0900
Subject: interactive execution
In-Reply-To: <42096A7A.2D8CF4E1@yahoo.com>
References: <42096A7A.2D8CF4E1@yahoo.com>
Message-ID: <cubt40$1fiv$1@dojima-n0.hi-ho.ne.jp>

Jive Dadson wrote:

> I've got some code that compiles some text and then executes it.  When
> the string is "print 'Hello'", it prints "Hello".  I get no exception
> when I compile and execute "foo = 555".  If I then compile and exec
> "print foo", I get a name error. The variable foo is undefined. My
> assumption is that the "exec" command created a new namespace, put "foo"
> in that namespace, and then threw the namespace away.  Or something.
> 
> I know it must be possible to do this, because it's exactly what
> programs like IDLE do.
> 

   exec statement in name_space
will do the trick.

 >>> d = {}
 >>> exec 'foo=555' in d
 >>> d['foo']
555
 >>> exec "print foo" in d
555

- george


From Serge.Orlov at gmail.com  Tue Feb 22 06:00:21 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: 22 Feb 2005 03:00:21 -0800
Subject: UTF-8 / German,
	Scandinavian letters - is it really this difficult?? Linux &
	Windows XP
References: <cve1vh$c37$1@phys-news1.kolumbus.fi>
Message-ID: <1109070021.283012.308090@z14g2000cwz.googlegroups.com>

Mike Dee wrote:
> [snip wrestling with byte strings]

In addition to Martin reply I just want to add two notes:
1. Interactive console in python 2.3 has a bug that was fixed
in 2.4, so you can't enter unicode strings at the prompt:

C:\Python24>python.exe
>>> a=u'???'
>>> a
u'\u0430\u0431\u0432'

C:\Python23>python.exe
>>> a=u'???'
>>> a
u'\xa0\xa1\xa2'

in 2.3 you need to use decode method to get unicode strings:
>>> import sys
>>> a2='???'.decode(sys.stdin.encoding)
>>> a2
u'\u0430\u0431\u0432'

2. Suse ships buggy build of python so title doesn't work
properly, see discussion http://tinyurl.com/4k3au

>>> print aoumlautxyz.title()
??Xyz

You will need to call setlocale to help you:

>>> import locale
>>> locale.setlocale(locale.LC_ALL,'')
'en_US.utf-8'
>>> print aoumlautxyz.title()
??xyz

  Serge.



From python-url at phaseit.net  Tue Feb  1 01:08:04 2005
From: python-url at phaseit.net (Cameron Laird)
Date: Tue, 01 Feb 2005 06:08:04 GMT
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Feb  1)
Message-ID: <ctn3bm$8aj$1@lairds.us>

QOTW: "The right solution will end up being unique to Python though. It has
to feel like Python." -- Guido van Rossum
    http://aws.typepad.com/aws/2005/01/amazon_devcon_g_4.html

"Sparring with Alex Martelli is like boxing Mike Tyson, except that one
experiences brain enhancement rather than brain damage :)." -- beliavsky


    This is your opportunity to vote on the prospective creation of 
    de.comp.lang.python:
        http://groups.google.de/groups?selm=erneuter-CfV-1-Einrichtung-de.comp.lang.python-16.1.2005-Supersede%40dana.de
	http://gvv.th-h.de/

    eval() often inverts repr().  pickle() makes for more reliable
    serialization:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/f4324fe8aa00f7f5/

    Kamilche illustrates how scripting (Web-scraping, in this case)
    can put eBay (Google, Amazon, ...) under *your* control:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/1b0d7ebb06c49272

    Tim Churches pulls off the remarkable feat of appearing to say
    true, useful, and not-stultifying things on licensing:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/a1e07194c795f505/

    How declarative are metaclasses and decorators?  Diez B. Roggisch
    has been helpful with this and similarly interesting summaries and
    examples:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/a75da70b0845b6fe/
    Art Siegel also approaches the question, in a more narrative
    fashion.  Notice in the same thread Steve Holden's persistent
    advertising of PyCon 2005, emphasizing the celebrities (martellibot!,
    Armin "I Infer That" Rigo, ...) expected to appear, some for the
    first time ever in this dimension.

    Nick Coghlan explains the trickiness of Duncan Booth and F. 
    PetitJean.  This is a chance to practice generators, zip,
    map, and iter, all in about two lines:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/a6ba37b0fb0fa69e

    Do you know the standard library well enough to recognize its
    parametric statistics?
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/1ddd1e869fe6e08a/

========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Brett Cannon continues the marvelous tradition established by 
    Andrew Kuchling and Michael Hudson of intelligently summarizing
    action on the python-dev mailing list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    The Python Business Forum "further[s] the interests of companies
    that base their business on ... Python."
	http://www.python-in-business.org

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    deli.cio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topics/pythonurl/         
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.




From stefan.behnel-n05pAM at web.de  Sat Feb 12 08:51:09 2005
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Sat, 12 Feb 2005 14:51:09 +0100
Subject: [PATCH] Re: frozenset() without arguments should return a singleton
In-Reply-To: <mailman.2423.1108162236.22381.python-list@python.org>
References: <cuj06r$ep5$1@lnx107.hrz.tu-darmstadt.de>
	<mailman.2423.1108162236.22381.python-list@python.org>
Message-ID: <cul1k5$4eu$1@lnx107.hrz.tu-darmstadt.de>


Terry Reedy schrieb:
>>frozenset() called without arguments (or on empty sequences)
>>should always return a singleton object.
> 
> If we interpret 'should' as 'preferably by me', ok.
> 
> It will take some programmer's time to add the special case check and run 
> the test suite, and check in the changes.  Yours?  And perhaps some 
> execution time for each frozenset call.  Since frozenset is not much used, 
> and multiple empty frozensets very rare, and the difference mostly 
> invisible, the frozenset implementor probably went on to other things.

I read 'not much used' and 'very rare' as 'I rarely use them'. Others may.

It does not take much additional execution time, I just checked, a partial 
test is already in there that should be enough for the 'frozenset()' case. 
Additional tests for empty iterables would however be more costly and 
therefore not necessarily worth doing. Up to the maintainers.

I don't have any experience in writing extension modules for the standard 
library and 'running the test suite'. Implementing the check is trivial, 
though. Could anyone please 'run the test suite' ?

I tested it a bit, though, seems to work, including subclassing.

Stefan

--- Objects/setobject.c.ORIG    2005-02-12 14:04:54.000000000 +0100
+++ Objects/setobject.c 2005-02-12 14:41:04.000000000 +0100
@@ -76,6 +76,8 @@
         return (PyObject *)so;
  }

+PyObject *frozen_empty_set = NULL;
+
  static PyObject *
  frozenset_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
  {
@@ -83,7 +85,14 @@

         if (!PyArg_UnpackTuple(args, type->tp_name, 0, 1, &iterable))
                 return NULL;
-       if (iterable != NULL && PyFrozenSet_CheckExact(iterable)) {
+       if (iterable == NULL) {
+               if (type == &PyFrozenSet_Type) {
+                       if (frozen_empty_set == NULL)
+                               frozen_empty_set = make_new_set(type, NULL);
+                       Py_INCREF(frozen_empty_set);
+                       return frozen_empty_set;
+               }
+       } else if (PyFrozenSet_CheckExact(iterable)) {
                 Py_INCREF(iterable);
                 return iterable;
         }
-------------- next part --------------
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From me at privacy.net  Fri Feb 18 15:26:34 2005
From: me at privacy.net (Dan Sommers)
Date: 18 Feb 2005 15:26:34 -0500
Subject: Access to formatting controls from within __repr__ or __str__?
References: <m2braiwy23.fsf@unique.fully.qualified.domain.name.yeah.right>
	<1108718706.649402.264600@o13g2000cwo.googlegroups.com>
Message-ID: <m2zmy1vclh.fsf@unique.fully.qualified.domain.name.yeah.right>

On 18 Feb 2005 01:25:06 -0800,
"Serge Orlov" <Serge.Orlov at gmail.com> wrote:

> Dan Sommers wrote:

>> So my question is:  Is there a way to pass options "through" a format
>> string to the __str__ and __repr__ functions?  For example, can I
>> define my own alternate form for use with the '#' formatting
>> character, so that '%#s' generates output according to SI guidelines?

> You can create your own class FmtTemplate like string.Template was done
> in python 2.4: http://docs.python.org/lib/node105.html

That looks interesting.  Perhaps that will push me into upgrading to 2.4
sooner rather than later (I'm *not* looking forward to rebuilding all my
extensions...).

Thanks you,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>
Never play leapfrog with a unicorn.


From http  Mon Feb 21 09:39:11 2005
From: http (Paul Rubin)
Date: 21 Feb 2005 06:39:11 -0800
Subject: lambda closure question
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
	<slrnd1jjo4.jkb.apardon@rcpc42.vub.ac.be>
	<mailman.2891.1108988864.22381.python-list@python.org>
	<slrnd1jlne.jkb.apardon@rcpc42.vub.ac.be>
	<37u4dpF5cboqvU1@individual.net>
Message-ID: <7xsm3qc700.fsf@ruckus.brouhaha.com>

"Diez B. Roggisch" <deetsNOSPAM at web.de> writes:
> It's not only that way in python, but in java too. So it seems that there is
> a fundamental principle behind it: In a language that allows sideeffects,
> these will actually happen.

Can you even have nested functions in Java?  Algol-60 did things the
way you'd expect, i.e. you can modify the outer variable from the
inner scope.


From usenet_spam at janc.invalid  Wed Feb  2 20:26:57 2005
From: usenet_spam at janc.invalid (JanC)
Date: Thu, 03 Feb 2005 01:26:57 GMT
Subject: Suggesion for an undergrad final year project in Python
References: <1107241918.722156.123590@c13g2000cwb.googlegroups.com>
	<7mKLd.18577$MX2.6627@twister.nyroc.rr.com>
Message-ID: <Xns95F218EA057AEJanC@213.118.75.35>

Kartic schreef:

> Or if you are the networking types, come up with a peer-to-peer chat 
> application with whitetboard capability, which I am sure will be fairly 
> novel.

Hm, a Python version of The Coccinella?  :-)

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From uche at ogbuji.net  Fri Feb  4 10:34:23 2005
From: uche at ogbuji.net (Uche Ogbuji)
Date: 4 Feb 2005 07:34:23 -0800
Subject: forms, xslt and python
In-Reply-To: <opslk7o2c1yqlbtb@frengky>
References: <opslk7o2c1yqlbtb@frengky>
Message-ID: <1107531263.421979.156080@g14g2000cwa.googlegroups.com>

Firstly, that isn't an XML file.  You're missing quotes around
attribute values.

Secondly, your question is very unclear.  Are you looking for an XSLT
way to correlate the correct_answer attribute to the alternative
element in corresponding order?  Are you looking for a Python means to
do this?


--
Uche Ogbuji                                    Fourthought, Inc.
http://uche.ogbuji.net    http://4Suite.org    http://fourthought.com
Use CSS to display XML -
http://www.ibm.com/developerworks/edu/x-dw-x-xmlcss-i.html
Introducing the Amara XML Toolkit -
http://www.xml.com/pub/a/2005/01/19/amara.html
Be humble, not imperial (in design) -
http://www.adtmag.com/article.asp?id=10286Querying WordNet as XML -
http://www.ibm.com/developerworks/xml/library/x-think29.html
Manage XML collections with XAPI -
http://www-106.ibm.com/developerworks/xml/library/x-xapi.html
Default and error handling in XSLT lookup tables -
http://www.ibm.com/developerworks/xml/library/x-tiplook.html
Packaging XSLT lookup tables as EXSLT functions -
http://www.ibm.com/developerworks/xml/library/x-tiplook2.html



From fuzzyman at gmail.com  Wed Feb 23 03:30:34 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 23 Feb 2005 00:30:34 -0800
Subject: Dealing with config files what's the options
In-Reply-To: <mailman.2952.1109122710.22381.python-list@python.org>
References: <mailman.2952.1109122710.22381.python-list@python.org>
Message-ID: <1109147434.684117.118630@f14g2000cwb.googlegroups.com>

Hello Tom,


Tom Willis wrote:
> How are the expert pythoneers dealing with config files?
>
> Is there anything similair to .net's config files or java's
.properties?
>

I'm not familiar with those config file formats - but ConfigObj
certainly makes handling config files easy. It uses the ini type layout
- which you're not so fond of, although it aloows lists for values as
well.

from configobj import ConfigObj
config = ConfigObj(filename)
value1 = config['section 1']['value 1']

See http://www.voidspace.org.uk/python/configobj.html

I'm interested in suggestions as to ways to take it forward. I've just
added unicode support (still experimental - wait for the next release)
and an interface for validation. Adding nested sections using
indentation will probably be the next major feature..... (as well as
preserving user formatting when writing back files)

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml

> A quick search on google didn't return anything that looked useful,
> and I almost would expect to see some module that would be for
dealing
> with config information.
>
> I can think of at least one way to do it, but I'm sure there are
> shortcomings I can't see yet, and I'd rather use something someone
> smarter than me has written.
>
> I see in the logging module that there's stuff to handle configs but
> seems kind of odd to have to import logging to get your config
> information
>
> Any ideas?
>
> have I used the word config enough in this message? :)
> 
> -- 
> Thomas G. Willis
> http://paperbackmusic.net



From ncoghlan at iinet.net.au  Fri Feb  4 07:01:44 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 04 Feb 2005 22:01:44 +1000
Subject: Learning Python for a new beginner
In-Reply-To: <1107504846.923502.185700@c13g2000cwb.googlegroups.com>
References: <1107504846.923502.185700@c13g2000cwb.googlegroups.com>
Message-ID: <42036428.8010302@iinet.net.au>

Lisa Horton wrote:
> I hear that Python is one of the easiest languages to learn. It is
> easier than PHP or Pearl? Is it as useful as those two? I am attracted
> to Python as a first language, but I just want to be sure I will be
> able to use it.
> 
> Opinions, thoughts, thanks!
> 

I suggest grabbing the 2.4 Python interpreter and the tutorial from 
www.python.org (if you're on Windows, the tutorial is included with the installer).

There are also resources like "Dive into Python" that may be useful.

With respect to PHP, I have no opinion, since I've never needed to use it. With 
respect to Perl, I find it to be such an inconsistent dog's breakfast that I 
have the docs page open whenever I have to write or read it. With Python, I 
first used it for one subject at University, and was able to pick it back up a 
few years later without even looking at the documentation.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From fredrik at pythonware.com  Wed Feb 16 14:34:16 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 16 Feb 2005 20:34:16 +0100
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net>
	<111773qkev2r045@corp.supernews.com>
Message-ID: <cv0723$pf6$1@sea.gmane.org>

Jeff Shannon wrote:

> One possibility I can think of would be Unicode.  I don't think that implicitly calling str() on 
> Unicode strings is desirable.

it's not.  but you could make an exception for basestring types.

> Of course, one could ensure that unicode.join() used unicode() and str.join() used str(), but I 
> can conceive of the possibility of wanting to use a plain-string separator to join a list that 
> might include unicode strings.

yes.

> Whether this is a realistic use-case

it is.  mixing 8-bit ascii strings with unicode works perfectly fine, and is a good
way to keep memory use down in programs that uses ascii in most cases (or
for most strings), but still needs to support non-ascii text.

I've proposed adding a "join" built-in that knows about the available string types,
and does the right thing for non-string objects.  unfortunately, the current crop of
py-dev:ers don't seem to use strings much, so they prioritized really important stuff
like sum() and reversed() instead...

</F> 





From nick at craig-wood.com  Sun Feb 13 05:30:01 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 13 Feb 2005 10:30:01 GMT
Subject: ANN: pyMinGW support for Python 2.3.5 (final) is available
References: <1108189500.707806.316520@g14g2000cwa.googlegroups.com>
	<slrnd0rmep.n4l.nick@irishsea.home.craig-wood.com>
	<1108237204.920670.213190@f14g2000cwb.googlegroups.com>
Message-ID: <slrnd0u861.c2l.nick@irishsea.home.craig-wood.com>

Simon John <simoninusa2001 at yahoo.co.uk> wrote:
>  [snip]
> > Ha anyone tried cross compiling python with mingw?  At work we compile
> > our software for lots of platforms (including windows) on a linux
> > build host.  The windows builds are done with a mingw cross compiler.
> > It would be interesting if we could do this with python + extensions
> > also.
> 
>  Yes, I was thinking of setting up a cross-compiling system, but why
>  would you use mingw instead of just gcc on Linux?

...because we cross-compile for Windows under linux.

The linux builds are done with plain gcc of course.

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


From caleb1 at telkomsa.net  Sun Feb  6 23:16:47 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Sun, 06 Feb 2005 23:16:47 -0500
Subject: Python versus Perl ?
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
Message-ID: <opsls7h9hu1js0xs@news.telkomsa.net>

Hi Surfunbear

I don't know about the stuff regarding jobs, resumes, etc, but I will tell  
you the same thing I tell everyone I meet regarding python:

Set aside a morning, and work through the python tutorial that comes with  
the documentation.  People like me are going to tell you this and that,  
perhaps try to convince of our particular world-view, and so on.

By the end of the tutorial (more likely at halfway) you will probably know  
whether this is worth pursuing or not.  Oh, and do this before you invest  
too much time in Perl :)

Keep well
Caleb

On 6 Feb 2005 05:19:09 -0800, <surfunbear at yahoo.com> wrote:

>
>  I've read some posts on Perl versus Python and studied a bit of my
> Python book.
>
>  I'm a software engineer, familiar with C++ objected oriented
> development, but have been using Perl because it is great for pattern
> matching, text processing, and automated testing. Our company is really
> fixated on risk managnemt and the only way I can do enough testing
> without working overtime (which some people have ended up doing) is by
> automating my testing. That's what got me started on Perl.
>
>  I've read that many people prefer Python and that it is better than
> Perl. However, I want to ask a few other questions.
>
>
> 1. Perl seems to have alot of packaged utilities available through
> CPAN, the comprehensive perl network. These can aid in building
> parsers, web development, perl DBI is heavily used. This seems to be a
> very important benifit. I'm not sure that Python is as extenive at all
> in that regard ? Perl also has excellent pattern matching compared to
> sed, not sure about how Python measures up,
>  but this seems to make perl ideally suited to text processing.
>
> 2. Python is apparantly better at object oriented. Perl has some kind
> of name spacing, I have used that in a limited way. Does Perl use a
> cheap and less than optimal Object oriented approach ?
> That was what someone at work said, he advocates Python.
> Is it likely that Perl will improve it's object oriented features
> in the next few years ?
>
> 3. Perl is installed on our system and alot of other systems.
> You don't have to make sys admins go out of there way to make it
> available. It's usualy allready there. I also did a search of job
> postings on a popular website. 108 jobs where listed that require
> knowledge of Perl, only 17 listed required Python. Becomeing more
> familiar with Perl might then be usefull for ones resume ?
>
>
>
>  If Python is better than Perl, I'm curious how really significant
> those advantages are ?
>



From limodou at gmail.com  Wed Feb 23 23:45:37 2005
From: limodou at gmail.com (limodou)
Date: Thu, 24 Feb 2005 12:45:37 +0800
Subject: Source Encoding GBK/GB2312
In-Reply-To: <cvjl7m$sgm$1@sea.gmane.org>
References: <1109217736.643721.201240@o13g2000cwo.googlegroups.com>
	<cvjl7m$sgm$1@sea.gmane.org>
Message-ID: <505f13c0502232045796faff1@mail.gmail.com>

2.4 support gb2312, gbk, gb18030 and cjk codec.
you can also move these things to 2.3.


On Wed, 23 Feb 2005 22:34:02 -0600, Steve Holden <steve at holdenweb.com> wrote:
> steven at lczmsoft.com wrote:
> 
> > When I specify an source encoding such as:
> >
> > # -*- coding: GBK -*-
> > or
> > # -*- coding: GB2312 -*-
> >
> > as the first line of source, I got the following error:
> >
> > SyntaxError: 'unknown encoding: GBK'
> >
> >
> > Does this mean Python does not support GBK/GB2312?  What do I do?
> >
> 
> Well, *your* Python might not support GTK:
> 
> sholden at dellboy ~
> $ cat test90.py
> # -*- coding: GBK -*-
> 
> print "Hello!"
> 
> sholden at dellboy ~
> $ python test90.py
> Hello!
> 
> but Python generally appears to. Do you have encodings/gbk.py in your
> library?
> 
> regards
>   Steve
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
I like python! 
My Blog: http://www.donews.net/limodou
New Maillist: http://groups-beta.google.com/group/python-cn


From vze4rx4y at verizon.net  Sat Feb 12 17:33:31 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Sat, 12 Feb 2005 22:33:31 GMT
Subject: listerator clonage
References: <mailman.2429.1108173429.22381.python-list@python.org>
Message-ID: <%uvPd.32029$W16.12563@trndny07>

[Cyril BAZIN]
> I want to build a function which return values which appear two or
> more times in a list:
>
> So, I decided to write a little example which doesn't work:
> #l = [1, 7, 3, 4, 3, 2, 1]
> #i = iter(l)
> #for x in i:
> #    j = iter(i)
> #    for y in j:
> #        if x == y:
> #            print x

Here's one way:

s = [1, 7, 3, 4, 3, 2, 1]
seen = []
dups = []
for elem in s:
    if elem in seen:
         if elem not in dups:
             dups.append(elem)
    else:
         seen.append(elem)
print dups

This snippet has the virtue of not outputting the duplicate value more than once
and it does not rely on the values being hashable or ordered.   It has the vice
of running at O(n**2) speed.  A further property is that the values are output
in the order seen.

If the values are ordered but not hashable, itertools.groupby offers a faster
O(n lg n) solution that outputs the values in sorted order:

import itertools
print [k for k, g in itertools.groupby(sorted(s)) if len(list(g))>1]

If the values are known to be hashable, dictionaries offer an even faster O(n)
solution that outputs the values in arbitrary order:

bag = {}
for elem in s:
    bag[elem] = bag.get(elem, 0) + 1
print [elem for elem, count in bag.iteritems() if count>1]


Raymond Hettinger


P.S.  Extra credit problem:  make the itertools solution output values in the
order seen.




From no.spam at thanks.com  Sun Feb 27 06:36:20 2005
From: no.spam at thanks.com (Mike P.)
Date: Sun, 27 Feb 2005 22:36:20 +1100
Subject: Text To Speech with pyTTS
Message-ID: <4221b0b6$0$1998$afc38c87@news.optusnet.com.au>

Hi,
I was wondering if anyone has had any luck with the python text to speech
(pyTTS) module available on Sourceforge:
http://sourceforge.net/projects/uncassist

I have followed the tutorial for pyTTS at:
http://www.cs.unc.edu/~parente/tech/tr02.shtml

Using the first simple speech example:

import pyTTS

tts = pyTTS.Create()
tts.Speak("Hello World!")

I get the following error on the call to pyTTS.Create()

C:\Program Files\Python23\Lib\site-packages\pyTTS>python
ActivePython 2.3.2 Build 232 (ActiveState Corp.) based on
Python 2.3.2 (#49, Nov 13 2003, 10:34:54) [MSC v.1200 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import pyTTS
>>> tts = pyTTS.Create()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "C:\Program Files\Python23\Lib\site-packages\pyTTS\__init__.py", line
28, in Create
    raise ValueError('"%s" not supported' % api)
ValueError: "SAPI" not supported
>>>

I followed the instructions in the tutorial in order and installed the
required packages in the following order, given that I already had an
ActiveState Python 2.3 installation under Windows XP.

1) wxPython2.5-win32-unicode-2.5.3.1-py23.exe (didn't already have this and
some of the pyTTS demos need it)

2) Microsoft SAPI 5.1 (SAPI5SpeechInstaller.msi)
3) Extra Microsoft Voices (SAPI5VoiceInstaller.msi)
4) pyTTS-3.0.win32-py2.3.exe (pyTTS for Python 2.3 under windows)

I ran the example and it didn't work. I didn't initially install Mark
Hammond's
Python win32all extensions, because they already come with ActiveState
Python.
So I tried installing the win32all (win32all-163.exe) package just in case,
but I still
get the SAPI not supported error.

Anyone get this working - any suggestions? Or am I missing something
obvious?

Thanks In Advance.

Mike P.




From fredrik at pythonware.com  Mon Feb 14 11:02:20 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 17:02:20 +0100
Subject: newbie question - identifying name of method
References: <1108396343.218224.79980@c13g2000cwb.googlegroups.com>
Message-ID: <cuqhtc$n35$1@sea.gmane.org>

mirandacascade at yahoo.com wrote:

> Does Python provide some sort of mechanism for answering the question:
> what method am I in?
>
> Example: assume the file example1.py contains the following code:
>
> def driver():
>    print 'hello world'
>    print __name__
>    print 'the name of this method is %s' % str(???)
>
> The output I'd like to see is:
>
> hello world
> example1
> driver
>
> and I'd like to be able to see it without hardcoding the string
> 'driver' in the third print statement.  Is there anything I can
> substitute for the ??? that answers the question: what method am I in?

replace str(???) with

    (sys._getframe().f_code.co_name or "???")

</F> 





From alexrait at gmail.com  Tue Feb  1 18:31:16 2005
From: alexrait at gmail.com (alexrait1)
Date: 1 Feb 2005 15:31:16 -0800
Subject: how about writing some gui to a known console application
In-Reply-To: <pan.2005.02.01.23.06.38.622308@jerf.org>
References: <1107294520.224155.131640@f14g2000cwb.googlegroups.com>
	<41fffb59$0$21637$a1866201@visi.com>
	<pan.2005.02.01.23.06.38.622308@jerf.org>
Message-ID: <1107300676.282484.10840@o13g2000cwo.googlegroups.com>

I tried to delete this message, but I guess it was too late... or it
didn't work for me... sorry anyway.



From "phile\" at (none)  Tue Feb 15 15:00:28 2005
From: "phile\" at (none) (@(none))
Date: Tue, 15 Feb 2005 20:00:28 +0000
Subject: Postgres COPY Command with python 2.3 pg
In-Reply-To: <slrnd14dni.2bu.michi@michi.si.eunet.at>
References: <slrnd14dni.2bu.michi@michi.si.eunet.at>
Message-ID: <42124f26$0$22499$7b0f0fd3@mistral.news.newnet.co.uk>

Michael Lang wrote:
> using psql it works fine, but i dont know how to get it working in python.
> Ive already made the calls but the changes never apper, and no error.

Which Postgres module are you using? I had the exct same problem when I 
first started using pyPgSQL, until I figured out that I needed to do:

     db = PgSQL.connect(DSN)
     db.autocommit = 1
     con = db.cursor()

In my code.


From http  Sat Feb 19 22:23:36 2005
From: http (Paul Rubin)
Date: 19 Feb 2005 19:23:36 -0800
Subject: [Fwd: Re: [Uuu-devel] languages] <-- Why Python
References: <mailman.2781.1108677768.22381.python-list@python.org>
	<1108678805.542584.171930@z14g2000cwz.googlegroups.com>
	<mailman.2783.1108679758.22381.python-list@python.org>
	<864qgaisoq.fsf@guru.mired.org>
	<mailman.2785.1108689484.22381.python-list@python.org>
	<86vf8qhcql.fsf@guru.mired.org>
	<mailman.2787.1108691319.22381.python-list@python.org>
	<86r7jdh5vw.fsf@guru.mired.org>
	<mailman.2852.1108869628.22381.python-list@python.org>
Message-ID: <7xfyzrgbif.fsf@ruckus.brouhaha.com>

Nick Coghlan <ncoghlan at iinet.net.au> writes:
> Compare out-of-the-box Python:
>    a = 1 + 2 + 3 + 4
> 
> And out-of-the-box Lisp:
>    (setq a (+ 1 2 3 4))
> 
> Which language has the lower barrier for entry? That should be a
> fairly important consideration for a language that is going to sit at
> the heart of an OS.

Huh?  Why does mucking about in the heart of an OS need a low barrier
of entry?


From gargonx at gmail.com  Sat Feb 12 19:27:14 2005
From: gargonx at gmail.com (gargonx at gmail.com)
Date: 12 Feb 2005 16:27:14 -0800
Subject: help please
Message-ID: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>

would anyone like to help to fugure out this problem i'm having here's
a portion of my code:

"""
I have three dictionaries along with this(you can probally spot what
they are), but just in case here are some testers:
"""
std = {
   "b":"bo"
    }

ext = {
    "aa":"i"
    }

punc = {
    ",":"!"
    }
"""
when i run this i get :

UnboundLocalError: local variable 't2' referenced before assignment

"""

OrigText="ba, baa bo."

t2=""

def Proc(text): # "text" is some random text or use OrigText
    for word in text:
        for letter in word:
            if letter in std.keys():
                letter=std[letter]
                t2=t2+letter  # the problem is referene to this
            elif letter in ext.keys():
                letter=ext[letter]
                t2=t2+letter
            elif letter in punc.keys():
                letter=punc[letter]
                t2=t2+letter

can anyone figure out why t2 is not being used properly?



From michele.simionato at gmail.com  Fri Feb 18 00:02:37 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 17 Feb 2005 21:02:37 -0800
Subject: low-end persistence strategies?
In-Reply-To: <mailman.2777.1108674138.22381.python-list@python.org>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<mailman.2735.1108616299.22381.python-list@python.org>
	<1108622622.119311.43200@f14g2000cwb.googlegroups.com>
	<mailman.2746.1108629315.22381.python-list@python.org>
	<1108629775.800508.3400@f14g2000cwb.googlegroups.com>
	<mailman.2777.1108674138.22381.python-list@python.org>
Message-ID: <1108702957.327528.22010@z14g2000cwz.googlegroups.com>

> John Lenton:
Also, if you use something where the process doesn't terminate between
calls (such as mod_python, I guess), you have to be sure to write the
try/finallys around your locking code, because the OS only cleans up
the lock when the process exits.

This is what I feared. What happens in the case of a power failure?
Am I left with locked files floating around?

      Michele Simionato



From phil at freehackers.org  Sun Feb  6 08:19:21 2005
From: phil at freehackers.org (Philippe Fremy)
Date: Sun, 06 Feb 2005 14:19:21 +0100
Subject: bytecode obfuscation
In-Reply-To: <mailman.2014.1107676937.22381.python-list@python.org>
References: <mailman.1837.1107465982.22381.python-list@python.org>	<ctu72f$fs3$1@nemesis.news.tpi.pl>
	<mailman.2014.1107676937.22381.python-list@python.org>
Message-ID: <4206195e$0$24724$626a14ce@news.free.fr>

Adam DePrince wrote:
> No amount of obfuscation is going to help you.

Theorically, that's true. Anything obfuscated can be broken, just like 
the non obfuscated version. However it takes more skills and time to 
break it. And that's the point. By raising the barrier for breaking a 
product, you just eliminate a lot of potential crackers.

> The worst case if you depend on obscurity:  The bad guys are rounding
> off your pennies as you read this.

That's the worst case, we all know that. A good case is to rely on open 
spec and standard. However, obscurity can help if added on top of that.

I remember an article of Fyodor explaining that if you run your internal 
apache server on port 1234 (for an enterprise) with all the normal 
security turned on, you avoid 80% of the common cracker. You should not 
rely on the port number for security but changing it improves it.

	Philippe


From fredrik at pythonware.com  Tue Feb 15 17:03:16 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 15 Feb 2005 23:03:16 +0100
Subject: Access function defaults
References: <972ec5bd050119111359e358f5@mail.gmail.com><797fe3d405011911465ab59acd@mail.gmail.com><mailman.904.1106165377.22381.python-list@python.org><1106177050.630141.33090@c13g2000cwb.googlegroups.com><972ec5bd0501191641166972b0@mail.gmail.com><mailman.922.1106193225.22381.python-list@python.org><7xis5szpdj.fsf@ruckus.brouhaha.com><mailman.923.1106196903.22381.python-list@python.org><7xekggbrns.fsf@ruckus.brouhaha.com>
	<SXOHd.82817$Jk5.62292@lakeread01><7x651rwbib.fsf@ruckus.brouhaha.com>
	<lr1Id.83348$Jk5.73956@lakeread01><mailman.1038.1106337274.22381.python-list@python.org><7xfz0uqe1d.fsf@ruckus.brouhaha.com>
	<bbnId.4971$ry.3995@fed1read05><7xu0p9lk4h.fsf@ruckus.brouhaha.com><1gqsn7o.qyazai1nh7smmN%aleaxit@yahoo.com>
	<1108504009.3892.51.camel@lipscomb.mbi.ucla.edu>
Message-ID: <cutrdo$elg$1@sea.gmane.org>

James Stroud wrote:

> By the way, I already know a million "better" ways to do this, so no
> need for the "why would you want to do that?" responses.

why not?

(if you really want to know how this works, study the source code for
the "getargspec" function in the inspect module.  or easier, you can just
use that function to fetch the default:

    def getdefault(function, name):
        import inspect
        args, varargs, varkw, defaults = inspect.getargspec(bob)
        first = len(args) - len(defaults)
        pos = args.index(name)
        if pos >= first:
            return defaults[pos - first]
        return None # no default

    print getdefault(bob, "wives")

)

</F> 





From writeme at almad.net  Mon Feb  7 10:54:14 2005
From: writeme at almad.net (Almad)
Date: Mon, 07 Feb 2005 16:54:14 +0100
Subject: Python on WWW - beginners question: what to choose?
Message-ID: <cu82v8$2f17$1@news.vol.cz>

Hello, 

I'm currently starting with Python as a language for writing websites. I
must say that I'm overwhelmed by the number of choices I have (mod_python
with publisher, Vampire, mps, Spyce), cgi, fcgi, Webware, Zope,
Plone, ...). 

Isn't there any article in style "this suite use this style of programming
and is good for this type of applications"? 

I've tried mod_python.publisher and Spyce so far (and looked on few others,
as mps, Vampire and Cheerypy). I'm currently giving Spyce the biggest
chance...however, I'm not very satisfied with "in-line" coding (PSP-style)
as I do not want to program this way and I think it must have some
performance impact...but session.auto, request and response modules are big
help. 
I'm satisfied with concept of mps, however It's fine that author hate
writing HTML, but I want to; or better, I want to use Cheetah Templates - i
think they are better for bigger sites (then homepage) as the one I want to
write. 

Well...what exactly I'm looking for? 

1) No module importing problem. In ideal case, specify directory, so I can
just import my_module, my_another_module...but that has to be "sandboxed"
for each apache virtual host. I would like to avoid interference between
sites I'm hosting. 

2) Pooling. I want to have "pool" for data, which are shared between
sites/request, f. e. database connection. However, for some sites I would
like to have "kernel" module, which will be loaded in RAM, so sites must
not grab data from database (f. e. number of users online). However, this
could be solved by running system daemon on server...but it's not the ideal
solution, IMHO. 

3) I'm not looking for framework so much complex as Zope or Plone is. My
site is specific with some original ideas, which are not reusable on other
sites, so I want to write it "from scratch". Additionally, I like to knew
code of the sites on web - f. e. using Cheetah don't bother me (it's not
directly on web), but using Phorum or phpBB yes. 

I'm not interested in calling of pages (page.py/function or page.py?args), I
will use mod_rewrite anyway. 

Is there anything what will satisfy my requirements, or I must write it? :)
Or I'm looking on this problem from bad shape and re-inventing wheel?

Thanks for advises (and sorry for long post for those who don't like it), 

-- 
Lukas "Almad" Linhart
[:: http://www.almad.net/ ::]
[:: PGP/GNUPg key: http://www.almad.net/download/pubkey.asc ::]


From ilias at lazaridis.com  Tue Feb 15 10:25:17 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 17:25:17 +0200
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <curdar$opf$1@news1.ucsd.edu>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108370491.792820.142200@z14g2000cwz.googlegroups.com>
	<cuprg2$6rt$1@usenet.otenet.gr> <37bcdkF5bg7knU1@individual.net>
	<cupumi$kfs$1@usenet.otenet.gr> <37bel6F59jvkgU1@individual.net>
	<cuq4d6$fqp$1@usenet.otenet.gr>
	<Xns95FD7EAD8A162duncanrcpcouk@127.0.0.1>
	<curb0t$67k$2@usenet.otenet.gr> <curdar$opf$1@news1.ucsd.edu>
Message-ID: <cut48r$h29$2@usenet.otenet.gr>

Robert Kern wrote:
> Ilias Lazaridis wrote:
>> Duncan Booth wrote:
>>> Ilias Lazaridis wrote:
>>> 
>>>>> There is a OS-tool-chain supported on windows, cygwin.
>>>> 
>>>> this depends on cygwin.dll, which is GPL licensed
>>>> 
>>>> [or am I wrong?]
>>> 
>>> It is GPL licensed with an amendment which prevents the GPL
>>> spreading
[...]

>> If I understand this right, I cannot produce commercial software
>> with the cygwin toolset.
> 
> Wait, you demand a completely open source toolchain on a proprietary
>  operating system to develop proprietary software?

I do not 'demand' this.

You've described existing constructs, which I simply like to use.

> The mind *boggles*.

.

-- 
http://lazaridis.com


From quentel.pierre at wanadoo.fr  Sun Feb 20 15:37:25 2005
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Sun, 20 Feb 2005 21:37:25 +0100
Subject: recommended way of generating HTML from Python
In-Reply-To: <1108889625.068929.88890@z14g2000cwz.googlegroups.com>
References: <1108889625.068929.88890@z14g2000cwz.googlegroups.com>
Message-ID: <4218f506$0$1220$8fcfb975@news.wanadoo.fr>

Here are a couple of pointers. I agree with Michele that it would be 
nice to have some kind of standardization. Maybe this would be worth a 
post to the Web-SIG ?

- I posted a 70-line recipe on the Python Cookbook, a sort of poor man's 
HTMLGen called HTMLTags
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/366000
with a syntax like this :

# print HTML( HEAD(TITLE('Test document')) +
#    BODY(H1('This is a test document')+
#        TEXT('First line')+BR()+
#        TEXT('Second line')))

The use of addition allows for shortcuts like
     print Sum([ TR(TD(i)+TD(i*i)) for i in range(100) ])

where Sum works like the built-in sum, but sum only works for numbers 
apparently

- in the Cookbook someone mentioned the HyperText package, published in 
2000 by Andy Dustman : http://dustman.net/andy/python/HyperText/

It uses this syntax :

# print TABLE(
#    TR((TH('SPAM'), TH('EGGS')),
#    TR(TD('foo','bar', colspan=2))
# )

The package also handles XML, SGML etc.

- I wrote to Andy and he said there was also Living Logic's XIST :
http://www.livinglogic.de/Python/xist/index.html

An example taken from the site :

#node = xsc.Frag(
#  xml.XML10(),
#  html.DocTypeXHTML10transitional(),
#  html.html(
#      html.head(
#         meta.contenttype(),
#         html.title("Example page")
#      ),
#      html.body(
#         html.h1("Welcome to the example page"),
#         html.p(
#            "This example page has a link to the ",
#            html.a("Python home page", href="http://www.python.org/"),
#            "."
#         )
#      )
#   )
# )
#
# print node.conv().asBytes(encoding="us-ascii")


From FRANKABEL at tesla.cujae.edu.cu  Thu Feb  3 13:32:33 2005
From: FRANKABEL at tesla.cujae.edu.cu (Frank Abel Cancio Bello)
Date: Thu, 03 Feb 2005 14:32:33 -0400
Subject: About standard library improvement
Message-ID: <WorldClient-F200502031432.AA32333857@tesla.cujae.edu.cu>

Hi!
If I make some improvement to xmlrpclib module, where I should send this 
improvement to form part of next standard library release?

Thank






From dan.eloff at gmail.com  Wed Feb 23 23:04:27 2005
From: dan.eloff at gmail.com (Dan Eloff)
Date: Wed, 23 Feb 2005 20:04:27 -0800
Subject: Dynamically pass a function arguments from a dict
References: <opsmoch20bcq4h53@rr-22.mshome.net> <421D29E7.5010609@mceahern.com>
Message-ID: <opsmon9pylcq4h53@rr-22.mshome.net>

Awesome, wrapping that into a function:

def getargs(func):
     numArgs = func.func_code.co_argcount
     names = func.func_code.co_varnames
     return names[:numArgs]

short, concise, and it works :)

variables declared inside the function body are also in co_varnames
but after the arguments only it seems

A good module (huge, very comprehensive)
for this kinda thing can be found at:

http://lfw.org/python/inspect.py

Thanks very much!
-Dan




From marian at mba-software.de  Tue Feb  1 14:28:11 2005
From: marian at mba-software.de (=?ISO-8859-1?Q?Marian_Aldenh=F6vel?=)
Date: Tue, 01 Feb 2005 20:28:11 +0100
Subject: Printing Filenames with non-Ascii-Characters
Message-ID: <36a3ikF4uk8r0U1@individual.net>

Hi,

I am very new to Python and have run into the following problem. If I do
something like

   dir = os.listdir(somepath)
   for d in dir:
      print d
      		
The program fails for filenames that contain non-ascii characters.

   'ascii' codec can't encode characters in position 33-34:

I have noticed that this seems to be a very common problem. I have read a lot
of postings regarding it but not really found a solution. Is there a simple
one?

What I specifically do not understand is why Python wants to interpret the
string as ASCII at all. Where is this setting hidden?

I am running Python 2.3.4 on Windows XP and I want to run the program on
Debian sarge later.

Ciao, MM
-- 
Marian Aldenh?vel, Rosenhain 23, 53123 Bonn. +49 228 624013.
http://www.marian-aldenhoevel.de
"There is a procedure to follow in these cases, and if followed it can
  pretty well guarantee a generous measure of success, success here
  defined as survival with major extremities remaining attached."


From arvid at linux.se  Sat Feb  5 18:31:42 2005
From: arvid at linux.se (Arvid Andersson)
Date: Sun, 6 Feb 2005 00:31:42 +0100
Subject: How do I convert arithemtic string (like "2+2") to a number?
In-Reply-To: <1107641467.104883.177850@c13g2000cwb.googlegroups.com>
References: <mailman.1996.1107640917.22381.python-list@python.org>
	<1107641467.104883.177850@c13g2000cwb.googlegroups.com>
Message-ID: <20050205233142.GA11022@shell.linux.se>

On Sat, Feb 05, 2005 at 02:11:07PM -0800, Michael Hartl wrote:
> Use the eval function:
> 
> >>> eval("30/(6+9)")
> 2
> 

Thanks, just what I was looking for!



From quentel.pierre at wanadoo.fr  Mon Feb 21 07:24:57 2005
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Mon, 21 Feb 2005 13:24:57 +0100
Subject: intersection of 2 list of pairs
In-Reply-To: <1108920276.253388.23590@f14g2000cwb.googlegroups.com>
References: <1108920276.253388.23590@f14g2000cwb.googlegroups.com>
Message-ID: <4219d31b$0$17249$8fcfb975@news.wanadoo.fr>

Another method is to build two sets of sets, one for E1 and one for E2, 
then make the intersection of these sets

- with Python 2.3

 >>> E1=[('a','g'),('r','s')]
 >>> E2=[('g','a'),('r','q'),('f','h')]
 >>> from sets import Set,ImmutableSet
 >>> f=Set([ImmutableSet(s) for s in E1])& Set([ImmutableSet(s) for s in 
E2])
 >>> [tuple(x) for x in f]
[('a', 'g')]

- with Python 2.4

 >>> E1=[('a','g'),('r','s')]
 >>> E2=[('g','a'),('r','q'),('f','h')]
 >>> f=set([frozenset(s) for s in E1]) & set([frozenset(s) for s in E2])
 >>> [tuple(x) for x in f]
[('a', 'g')]

You must use ImmutableSet or frozenset to be able to create a set of sets

Pierre


From spam at nospam.org  Fri Feb 11 20:59:54 2005
From: spam at nospam.org (Erik Johnson)
Date: Fri, 11 Feb 2005 18:59:54 -0700
Subject: Commerical graphing packages?
References: <420d1595$1@nntp.zianet.com>
Message-ID: <420d60e4$1@nntp.zianet.com>

Thank you both for your input. I will check them out. :)

-ej




From efrat_regev at yahoo.com  Thu Feb 24 12:20:31 2005
From: efrat_regev at yahoo.com (Efrat Regev)
Date: Thu, 24 Feb 2005 11:20:31 -0600
Subject: Python Modules for Various Internet Protocols?
References: <PLidnd5RcOYwYYDfRVn-3w@adelphia.com>
	<1109261801.439345.99120@o13g2000cwo.googlegroups.com>
Message-ID: <6-ednac3gJF_Y4DfRVn-1Q@adelphia.com>

"Kartic" <kartic.krishnamurthy at gmail.com> wrote in message
news:1109261801.439345.99120 at o13g2000cwo.googlegroups.com...
> Efrat Regev wrote:
> > Hello,
> >
> >     I was wondering whether there are any Python >
Erfat...yes...batteries included!
>
> http://docs.python.org/lib/internet.html
>
> Thanks,
> -Kartic
>


Excellent! more like generator included :-)

Many thanks,

Efrat




From me at privacy.net  Mon Feb 21 06:48:19 2005
From: me at privacy.net (Dan Sommers)
Date: 21 Feb 2005 06:48:19 -0500
Subject: python2.4 generator expression > python2.3 list expression
References: <mailman.2882.1108961815.22381.python-list@python.org>
Message-ID: <m2oeee5e2k.fsf@unique.fully.qualified.domain.name.yeah.right>

On Sun, 20 Feb 2005 20:56:52 -0800,
snacktime <snacktime at gmail.com> wrote:

> I need to convert a generator expression to a list expression so it
> will work under python 2.3.

> I rewrote this:

> for c in range(128):
>   even_odd = (sum(bool(c & 1<<b) for b in range(8))) & 1

> As this:

> for c in range(128):
>   bo = [bool(c & 1<<b) for b in range(8)]
>   even_odd = sum(bo) & 1


> Seems to work, is there a better way to do this?

for c in range( 128 ):
    even_odd = 0
    print '%3d' % c,
    while c:
        c &= c - 1
        even_odd = not even_odd
    print int( even_odd )

Okay, so your inner loop is only counting to 8, but IMO this is a good
example of how to use a better algorithm instead of optimizing the code
of a na?ve one.  My inner loop only iterates over 1-bits.

"Better," of course is all relative.  Your algorithm obviously counts
bits in an integer.  My algorithm is less clear at first glance (and
even second and third glance), but nearly idiomatic to those of us who
spent lots of time writing embedded assembly code.

If you have the space to spare, a lookup table (pre-calculated or
created during your program's initialization) is probably the best way
to go.

Regards,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>
Never play leapfrog with a unicorn.


From lbates at syscononline.com  Thu Feb  3 12:01:51 2005
From: lbates at syscononline.com (Larry Bates)
Date: Thu, 03 Feb 2005 11:01:51 -0600
Subject: CONTEST - What is the (best) solution?
In-Reply-To: <1107360831.659521.46460@z14g2000cwz.googlegroups.com>
References: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
	<qY-dneb-0f5iZ53fRVn-vw@comcast.com>
	<1107360831.659521.46460@z14g2000cwz.googlegroups.com>
Message-ID: <dq-dnbUM8PtgxZ_fRVn-sQ@comcast.com>

The data contains only references to variables in the
local namespace an not literal values.  Since local
variable names cannot include '{' or '}' characters,
my solution does in fact meet the criteria outlined.

Larry Bates

Fuzzyman wrote:
> Doesn't work if '{' or '}' can appear in the values.........
> Regards,
> 
> Fuzzy
> http://www.voidspace.org.uk/python/index.shtml
> 


From simon.brunning at gmail.com  Mon Feb 14 07:38:32 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Mon, 14 Feb 2005 12:38:32 +0000
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cuq57b$j83$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr>
Message-ID: <8c7f10c605021404383ade4aee@mail.gmail.com>

On Mon, 14 Feb 2005 14:23:08 +0200, Ilias Lazaridis <ilias at lazaridis.com> wrote:

(snip)

> But if those answers above were of official nature, I must seriously
> rethink if I can rely on _any_ system which is based on python, as the
> foundation and the community do not care about essential needs and
> requirements.

I couldn't agree more. You need to find a community that *does* care
about essential needs. Might I recommend Perl or Ruby?

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org  Tue Feb  8 11:10:46 2005
From: Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org (Alexander)
Date: Tue, 08 Feb 2005 19:10:46 +0300
Subject: graph visualisation
Message-ID: <MSGID_2=3A5025=2F3.131_420910b1@fidonet.org>

Hello, All!

I need routines for visualization of graphs, like this for Matlab:
===
You can visualize an arbitrary graph (such as one learned using the structure
learning routines) with Matlab code contributed by Ali Taylan Cemgil from the
University of Nijmegen. For static BNs, call it as follows:

draw_graph(bnet.dag);
===

Are there any packages with such ability? Also I need in drawing plots of
functions.

Alexander, zatv at bk.ru


From ajikoe at gmail.com  Tue Feb  1 02:20:48 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 31 Jan 2005 23:20:48 -0800
Subject: How can I use PyDoc to generate html file (modul in directory d)
In-Reply-To: <1107216196.502024.157500@z14g2000cwz.googlegroups.com>
References: <1107216196.502024.157500@z14g2000cwz.googlegroups.com>
Message-ID: <1107242448.722166.156420@c13g2000cwb.googlegroups.com>

Hello all,

I finaly find the solution, but please share yours if you have
different way to do it.

Theories:
PyDoc  menu can only search the module in directory when it was
first called and in python directory for example c:\python24. So I have
to call PyDoc in my module directory. It would be necessary to put in
your path (environment in windows Xp) something like :
path C:\python24\Lib

After that you can create a bat file containing:
pydoc.py -g

that's it. everytime you need to see your doc, just click your bat
file.


Sincerely Yours,
Pujo Aji



From fredrik at pythonware.com  Mon Feb 14 15:24:33 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 21:24:33 +0100
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<cupupa$kfs$2@usenet.otenet.gr><1108398011.213872.321390@o13g2000cwo.googlegroups.com><cuqqqi$ep1$1@ctb-nnrp2.saix.net><1108407625.250592.104280@c13g2000cwb.googlegroups.com><jN0XedqDmPECFwnz@objmedia.demon.co.uk><1108409476.874751.16600@l41g2000cwc.googlegroups.com>
	<gjA3VcsQFQECFw0m@objmedia.demon.co.uk>
Message-ID: <cur18v$f38$1@sea.gmane.org>

Stephen Kellett wrote:

>>if I have both versions of Python installed - 2.3.5 and 2.4?  Is there
>>an easy way to detect this and switch between the two dlls?
>
> Easy? Depends what you call easy.

in the context of "building a C extension when you have multiple versions
installed", the answer is "easy".  setup.py automatically finds the right DLL,
mingw seems take care of the rest.

> a) You just need to detect if pythonNN.dll is implicitly linked to msvcrt.dll or msvcrXX.dll 
> (where XX indicates a VS studio number, currently XX can only be 71, but if Python is done for 
> Visual Studio 2005 (8.0) then XX may also have a value of 80).
>
> b) GetModuleHandle(name of DLL from a) to get the DLL handle.
>
> c) GetProcAddress on the respective to get the C runtime function you want to call (for example, 
> fopen).
>
> d) call the function.
>
> You either need (a) or all of (a)...(d) depending on what you are doing. Those embedding Python 
> but no idea of the Python version in advance will do the latter.

if someone needs code that does it all, check the exemaker sources:

    http://effbot.org/zone/exemaker.htm

</F> 





From francis.girard at free.fr  Wed Feb  9 15:23:06 2005
From: francis.girard at free.fr (Francis Girard)
Date: Wed, 9 Feb 2005 21:23:06 +0100
Subject: A great Alan Kay quote
In-Reply-To: <420a6491$0$29509$a1866201@visi.com>
References: <420a5c1e$0$21630$a1866201@visi.com>
	<mailman.2264.1107976858.22381.python-list@python.org>
	<420a6491$0$29509$a1866201@visi.com>
Message-ID: <200502092123.06105.francis.girard@free.fr>

"""
Today he is Senior Fellow at Hewlett-Packard Labs and president of Viewpoints 
Research Institute, a nonprofit organization whose goal is to change how 
children are educated by creating a sample curriculum with supporting media 
for teaching math and science. This curriculum will use Squeak as its media, 
and will be highly interactive and constructive. Kay?s deep interests in 
children and education have been the catalysts for many of his ideas over the 
years. 
"""

I love him.

It's also interesting to see GUIs with windows, mouse (etc.), which apparently 
find their origin in is mind, probably comes from the desire to introduce 
computers to children.

Francis Girard

Le mercredi 9 F?vrier 2005 20:29, Grant Edwards a ?crit?:
> On 2005-02-09, James <spiralx at gmail.com> wrote:
> > Surely
> >
> > "Perl is another example of filling a tiny, short-term need, and then
> > being a real problem in the longer term."
> >
> > is better lol ;)
>
> That was the other one I really liked, and Perl was the first
> language I thought of when I saw the phrase "agglutination of
> features".  C++ was the second one.
>
> --
> Grant Edwards                   grante             Yow!  -- In 1962, you
> could at               buy a pair of SHARKSKIN visi.com            SLACKS,
> with a "Continental Belt," for $10.99!!



From raghulj at gmail.com  Wed Feb 23 21:51:50 2005
From: raghulj at gmail.com (Raghul)
Date: 23 Feb 2005 18:51:50 -0800
Subject: reading only new messages in imaplib
In-Reply-To: <mailman.2984.1109202342.22381.python-list@python.org>
References: <ECBA357DDED63B4995F5C1F5CBE5B1E8022289FC@its-xchg4.massey.ac.nz>
	<mailman.2984.1109202342.22381.python-list@python.org>
Message-ID: <1109213510.055463.252510@g14g2000cwa.googlegroups.com>

Thanks ya.It helped me a lot ............



From kent3737 at yahoo.com  Sat Feb  5 11:03:51 2005
From: kent3737 at yahoo.com (Kent Johnson)
Date: Sat, 05 Feb 2005 11:03:51 -0500
Subject: changing local namespace of a function
In-Reply-To: <cu0lru$8ik$1@joe.rice.edu>
References: <cu0lru$8ik$1@joe.rice.edu>
Message-ID: <4204eba4$1_2@newspeer2.tds.net>

Bo Peng wrote:
> Dear list,
> 
> I have many dictionaries with the same set of keys and I would like to 
> write a function to calculate something based on these values. For 
> example, I have
> 
> a = {'x':1, 'y':2}
> b = {'x':3, 'y':3}
> 
> def fun(dict):
>   dict['z'] = dict['x'] + dict['y']
> 
> fun(a) and fun(b) will set z in each dictionary as the sum of x and y.
> 
> My function and dictionaries are a lot more complicated than these so I 
> would like to set dict as the default namespace of fun. Is this 
> possible? The ideal code would be:
> 
> def fun(dict):
>   # set dict as local namespace
>   # locals() = dict?
>   z = x + y

You can part way there using keyword arguments. You just have to use dictionary syntax for changing 
values in the dictionary:

  >>> def f(d, x=None, y=None):
  ...   d['z'] = x + y
  ...
  >>> a = {'x':1, 'y':2}
  >>> b = {'x':3, 'y':3}
  >>>
  >>> f(a, **a)
  >>> a
{'y': 2, 'x': 1, 'z': 3}
  >>> f(b, **b)
  >>> b
{'y': 3, 'x': 3, 'z': 6}

Kent


From vze4rx4y at verizon.net  Sun Feb 13 21:00:26 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Mon, 14 Feb 2005 02:00:26 GMT
Subject: [PATCH] Re: frozenset() without arguments should return a
	singleton
References: <001701c51145$410e50c0$deae958d@oemcomputer>
	<culvhv$fgv$1@lnx107.hrz.tu-darmstadt.de>
	<L_wPd.19688$ya6.18125@trndny01>
	<cunenl$u6f$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <_CTPd.28743$s16.6015@trndny02>

"Stefan Behnel"
> I generally believe that many programmers will
> silently expect frozenset() to be (and become) more efficient than set() - in
> whatever regard: processing, memory, etc.

That belief is without foundation.  Except for mutating
methods and hashing methods, both set() and frozenset() share the same
underlying code and data structure.  In this respect, they differ from list()
and tuple() which have no shared code and has two substantially different
data structures.


Raymond Hettinger





From fredrik at pythonware.com  Sat Feb  5 07:25:58 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 5 Feb 2005 13:25:58 +0100
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
References: <ctsjmg$75p$1@usenet.otenet.gr><pan.2005.02.03.19.10.39.349763@jerf.org>	<ueCMd.22177$Ck1.1629547@news20.bellglobal.com><ctv8r8$cks$1@sea.gmane.org>
	<42040A4A.7060403@dcube-resource.be>
Message-ID: <cu2dud$udt$1@sea.gmane.org>

Jan Dries wrote:

>> have Pythoneers ever "banned" anyone from a public forum?  it's not like
>> we haven't seen trolls and crackpots before, you know.
>
> Well, we don't have to ban them because we have the PSU eliminate them alltogether. So much more 
> efficient. Or do you think it's a coincidence we've never seen or heard Timothy "autocoding" Rue 
> again?

he's been assimilated:

>>> "rue" in str(vars(__builtins__))
True

</F> 





From vze4rx4y at verizon.net  Wed Feb  9 14:25:47 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Wed, 09 Feb 2005 19:25:47 GMT
Subject: "Collapsing" a list into a list of changes
References: <dvOMd.33656$EG1.19314@lakeread04>
Message-ID: <%stOd.33426$8a6.7926@trndny09>

[Alan McIntyre]
> I have a list of items that has contiguous repetitions of values, but
> the number and location of the repetitions is not important, so I just
> need to strip them out.  For example, if my original list is
> [0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5], I want to end up with [0,1,2,3,2,4,5].

>>> import itertools
>>> [k for k, v in itertools.groupby(lst)]
[0, 1, 2, 3, 2, 4, 5]


Raymond Hettinger




From lists at mkempka.de  Sun Feb  6 11:19:52 2005
From: lists at mkempka.de (Matthias Kempka)
Date: Sun, 06 Feb 2005 17:19:52 +0100
Subject: Confused with methods
In-Reply-To: <4206C6DC.5050602@freemail.gr>
References: <4206C6DC.5050602@freemail.gr>
Message-ID: <420643A8.3070107@mkempka.de>

Hi Gerald,

When you define an instance method, the first parameter (in the 
definition) represents the instance. By convention, you would name it 
"self":

#####################
class B:
    def foo(self, x):
       print "we have two parameters: " + str(self) + " and " + x
#####################

then calling

######################
b = B()
b.foo("x")
######################

would be equivalent to

######################
b = B()
B.foo(b, "x")
######################


So, as you have noted, you need at least one parameter to attach the 
method to an instance. This is because the instance _is_ the parameter. 
Python does this for you internally.

For more documentation you should read the paragraph about classes in 
the tutorial.

Regards,
Matthias


From ncoghlan at iinet.net.au  Fri Feb  4 08:56:44 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 04 Feb 2005 23:56:44 +1000
Subject: global variables
In-Reply-To: <%UtMd.102705$Jk5.39995@lakeread01>
References: <1107385488.822768.317250@l41g2000cwc.googlegroups.com>	<1107388493.465599.140480@g14g2000cwa.googlegroups.com>	<3YSdnYVEmOCW8pzfRVn-sg@comcast.com>	<1107391350.933650.321440@z14g2000cwz.googlegroups.com>	<1107392092.290042.221600@c13g2000cwb.googlegroups.com>	<pqpMd.102688$Jk5.95091@lakeread01>	<nrWdnRM9Q6Gu_5_fRVn-jw@comcast.com>
	<%UtMd.102705$Jk5.39995@lakeread01>
Message-ID: <42037F1C.4040205@iinet.net.au>

A Steve wrote:
> A Steve wrote:
> 
>> A Steve wrote:
>>

There we go, much clearer ;)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From ilias at lazaridis.com  Tue Feb 15 16:12:02 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 23:12:02 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <86hdkdimfb.fsf@guru.mired.org>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr> <37bkemF5a7s7vU1@individual.net>
	<cut6nh$rpk$1@usenet.otenet.gr> <86ll9piuj8.fsf@guru.mired.org>
	<cutf1h$576$1@usenet.otenet.gr> <86hdkdimfb.fsf@guru.mired.org>
Message-ID: <cutoj0$g93$1@usenet.otenet.gr>

Mike Meyer wrote:
> Ilias Lazaridis <ilias at lazaridis.com> writes:
> 
>>Mike Meyer wrote:
>>
>>>>It is an community need.
>>>
>>>Based on the evidence at hand, this is a false statement.
>>
>>It is an community need [at least partially]
> 
> Repeating a falsehood will not make it true.
> 
> Can you offer anything besides your own whining to back this claim up?

please review my initial posting.

.

-- 
http://lazaridis.com


From gdamjan at gmail.com  Wed Feb  9 21:01:15 2005
From: gdamjan at gmail.com (Damjan)
Date: Thu, 10 Feb 2005 03:01:15 +0100
Subject: Reportlab and Barcodes
References: <1107894763.331701.26470@c13g2000cwb.googlegroups.com>
	<mailman.2252.1107964089.22381.python-list@python.org>
	<1107965379.046718.248000@c13g2000cwb.googlegroups.com>
	<1107976931.161073.258600@f14g2000cwb.googlegroups.com>
Message-ID: <36vtjbF50fr4bU1@individual.net>

> One of the users on the Reportlabs mailing list was kinda enough to
> offer me the solution.. A simple call to the drawOn function, e.g.:
> 
> bc = code39.Standard39("123",xdim = .015*inch)

whats code39 in this example?

> x = 6*inch
> y = -5*inch
> bc.drawOn(canvas,x,y)

-- 
damjan


From claird at lairds.us  Wed Feb  9 07:08:04 2005
From: claird at lairds.us (Cameron Laird)
Date: Wed, 09 Feb 2005 12:08:04 GMT
Subject: Lambda
References: <9VdOd.110$0b3.4668@news.uswest.net>
	<mailman.2226.1107914023.22381.python-list@python.org>
Message-ID: <ptapd2-s4n.ln1@lairds.us>

In article <mailman.2226.1107914023.22381.python-list at python.org>,
Tim Leslie  <tim.leslie at gmail.com> wrote:
			.
			.
			.
>* There is much debate as to just how useful lambda functions are and
>they are likely to be removed from the language in the distant futute
>(python 3)
			.
			.
			.
I like to think <URL:
http://www.unixreview.com/documents/s=9568/ur0502f/ur0502f.htm >
helps the debate.


From deetsNOSPAM at web.de  Sun Feb 20 15:50:14 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sun, 20 Feb 2005 21:50:14 +0100
Subject: Moving to Python from PHP - 3 questions
References: <mailman.2873.1108931203.22381.python-list@python.org>
Message-ID: <cvat62$9h0$05$1@news.t-online.com>

Hi,

> 2) Session management. Cookie-based sessions in PHP are pretty
> transparent, with a small library of basic functions that do 95% of
> what anyone may need to store session data in serialized files and
> associate them with cookies. I've seen python code that accomplishes
> this, but so far no pre-built server-side session management modules.

The python-based zope application server has session management. Togther
with a built-in user and access rights management. 

> 3) Structured request variables. PHP has a really handy feature where
> request variables with name like "foo[]", "foo[bar]", or
> "foo[bar][baz]" are automatically structured into nested associative
> arrays. I can see that the python cgi module will make a list of
> MiniFieldStorage objects when more than one variable with the same name
> is provided, but that's about the extent of it that I've seen.

This can be done in zope if you name a variable <name>:list. That then will
give you the variable as list regardless of the number of occurences.

> 
> An "RTFM" answer with a URL for the M would be great. :)

For zope: http://www.zope.org/

But there are plenty of other python http frameworks. The mod_python is
AFAIK the most basic and primitive one. But build on top of it or fully
python-based you have plenty of options. Google is your friend - this NG
features similar discussions every other week.


-- 
Regards,

Diez B. Roggisch


From apardon at forel.vub.ac.be  Tue Feb  8 08:28:05 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 8 Feb 2005 13:28:05 GMT
Subject: iterators instead of callbacks.
Message-ID: <slrnd0hfj4.26q.apardon@rcpc42.vub.ac.be>

My current understanding is that callbacks are used in a number
of places because they predate iterator. But now that we have
iterators these would be better suited. I'm thinking about the
FTP-lib now where iterator equivallents of retrbinary and retrlines
methods may be more easily usable then the current versions with a
callback.

So I was wondering, are such transformations in the pipeline
somewhere?

-- 
Antoon Pardon


From chaotrope at jps.net  Mon Feb 21 00:09:18 2005
From: chaotrope at jps.net (kim kubik)
Date: Mon, 21 Feb 2005 05:09:18 GMT
Subject: IDLE Problem: win98\Python2.4
Message-ID: <22eSd.1969$MY6.1483@newsread1.news.pas.earthlink.net>

This sure seems like it would have been
brought up but I checked Google Groups
(the dejanews replacement) and saw
nothing:  I installed Python2.4 in Win98
and IDLE doesn't work (neither does the
online manual even tho a 3.6KB Python24.chm
is there, but that's a story for another
day) - that is, clicking on the IDLE icon
in the Start menu just gives a brief hourglass
cursor and then nothing . . .

>From a DOS prompt (in C:\Python24) I can do
'python lib\idlelib\idle.py' and get a list
of errors, not being able to find tcl8.4 in
a number of paths, none of which exist in
the c:\python24 as installed. I moved tcl84.lib
into a directory it does search and got fewer
errors msg's, the last being like 'can't find
a usable init.tcl.'  Moved init.tcl to the same
dir as tcl84.lib, got even fewer errors, the
last being like
"_tkinter.TclError: invalid cmd name "tcl_findLibrary"

So I'm stuck. I uninstalled Py2.4, installed Py2.3.5,
again same thing . . . IDLE just does not come up
with the tcl paths of the standard install.

www.python.org gives answer to problems w/IDLE on Py1.5
from 1999 and shows adding tcl\bin to %PATH%.  OK . . .

What to try next? SOMEONE else must have seen this?
\kim




From martijn at gamecreators.nl  Mon Feb 28 07:10:23 2005
From: martijn at gamecreators.nl (martijn at gamecreators.nl)
Date: 28 Feb 2005 04:10:23 -0800
Subject: Python - what is the fastest database ?
Message-ID: <1109592623.116661.101880@g14g2000cwa.googlegroups.com>

H!,

I'm testing things with Python with databases.
But I have one big question.

What is the 'fastest' database for the internet in combination with
Python ?

- with +/- 15 GB data.
- fast internet SELECT query's.

Python use bsddb but could he handle 15 GB fast ?

A other question is:
How is it possible that google (super big database) is super fast?
What type database do they use / software ?

Thanks Very Much,
GC-Martijn



From fuzzyman at gmail.com  Thu Feb 24 05:06:24 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 24 Feb 2005 02:06:24 -0800
Subject: python tutorial/projects
In-Reply-To: <cvgf2o$u42$1@agate.berkeley.edu>
References: <cvgf2o$u42$1@agate.berkeley.edu>
Message-ID: <1109239584.738972.271050@z14g2000cwz.googlegroups.com>

I'm looking for people to work on a couple of projects... online
bookmarks manager for example....

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From EP at zomething.com  Wed Feb  9 01:07:47 2005
From: EP at zomething.com (EP)
Date: Tue, 8 Feb 2005 22:07:47 -0800
Subject: python code with indention
In-Reply-To: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
Message-ID: <20050208220747.2107585910.EP@zomething.com>


> ------------Original Message------------
> From: "Xah Lee" <xah at xahlee.org>

> is it possible to write python code without any indentation?

Perhaps our zen-like response to this question should have been:

>>>pass




From k.robert at gmx.de  Thu Feb  3 10:35:59 2005
From: k.robert at gmx.de (Robert)
Date: Thu, 03 Feb 2005 16:35:59 +0100
Subject: convert ftp.retrbinary to file object? - Python language lacks
 expression?
In-Reply-To: <mailman.1806.1107430675.22381.python-list@python.org>
References: <19804fd8.0502030208.10ace31e@posting.google.com>	<ctt0l1$o66$1@sea.gmane.org>	<ctt1cj$q2n$1@sea.gmane.org>
	<mailman.1806.1107430675.22381.python-list@python.org>
Message-ID: <cttgd3$1llu$1@ulysses.news.tiscali.de>

That turns into periodic new RETR commands with offset. Think its more 
an "odd" trick. I'd even prefer a threaded approach (thread puts the 
blocks into a stack; a while ... yield generator loop in the main thread 
serves the .read() function of the pseudo file object, which is my 
wish). Yet such tricks are all kind of OS-level tricks with a lot of 
overhead.

I wonder really, if the Python language itself can express an elegant 
flat solution to turn the block delivering callback function into a 
generator/.read(bytes) solution? I found no way.

(Looking over some Ruby stuff, Ruby seems to be able to do so from the 
language. I am not really familiar to Ruby. I always felt Python to be 
as complete - but much more clean. I became somewhat jealous ... :-) )

As the solution in my case has to stand many different file systems 
compatibly ( file.read(bytes) function !) and also other FTPS & SFTP 
classes with different retrbinary functions have to be compatible, I 
cannot even make a simple FTP subclassed retrbinary without getting 
really weired. Thus the existing .retrbinary with callback is the 
"official interface in this game".



 > >>     def callback(self, data):
 > >>         self.offset = self.offset + len(data)
 > >>         self.data = data
 > >>         ## now quit the RETR command?
 > >>         raise TransferAbort("stop right now")


From jbauer at rubic.com  Mon Feb 21 16:44:24 2005
From: jbauer at rubic.com (jbauer at rubic.com)
Date: 21 Feb 2005 13:44:24 -0800
Subject: subclassing Decimal
Message-ID: <1109022264.823730.224910@o13g2000cwo.googlegroups.com>

I was interested in playing around with Decimal and
subclassing it.  For example, if I wanted a special
class to permit floats to be automatically converted
to strings.

    from decimal import Decimal

    class MyDecimal(Decimal):
        def __init__(self, value):
            if isinstance(value, float):
                ... initialize using str(float) ...

In the classic days, I would have added something
like this to MyDecimal __init__:

    Decimal.__init__(self, str(value))

But I'm unfamiliar with the __new__ protocol.

Jeff Bauer
Rubicon, Inc.



From evrim at ankabt.com  Wed Feb 23 09:48:51 2005
From: evrim at ankabt.com (Evrim Ozcelik)
Date: Wed, 23 Feb 2005 16:48:51 +0200
Subject: A Question about SQLBuilder
Message-ID: <421C97D3.80202@ankabt.com>

Hi,

   We are going to make an database application integrated development 
environment with python, zope and cmf. I am searching for an sql builder 
class for generating sql sentences. This class must run over different 
sql relational databases. But i want to use zope database adapters for 
db connections. I dont want to manage connections in the python code.

   There is a class SQLBuilder seems to be suitable for us at this 
project. But i cant find enough document about SQLBuilder. There is a 
short one on the sqlobject.org website, but its quite poor. Have you 
ever heard about this class and is there anyone knows other documents 
about this class.

   If someone would help me about using this class over Zope with zope 
database adapters (like ZPsycopgDA, ZMySQLDA, etc) i will be very gladfull.

Kind Regards,

-- 

Evrim ?z?elik
Anka Information Technologies R&D Co.
Manager of Internet Technologies

Web   : http://www.ankabt.com/
Gsm   : +90 555 474 84 52
Phone : +90 212 276 19 69 # 134




From skip at pobox.com  Mon Feb 28 13:28:06 2005
From: skip at pobox.com (Skip Montanaro)
Date: Mon, 28 Feb 2005 12:28:06 -0600
Subject: naming convention for scalars, lists, dictionaries ...
In-Reply-To: <1109613115.760962.292360@z14g2000cwz.googlegroups.com>
References: <1109613115.760962.292360@z14g2000cwz.googlegroups.com>
Message-ID: <16931.25270.675563.436816@montanaro.dyndns.org>


    beliavsky> Since Python does not have declarations, I wonder if people
    beliavsky> think it is good to name function arguments according to the
    beliavsky> type of data structure expected, with names like "xlist" or
    beliavsky> "xdict".

In general, no.  I think variable names should reflect what they are naming,
not their types.

Skip


From deetsNOSPAM at web.de  Wed Feb 16 09:59:06 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 16 Feb 2005 15:59:06 +0100
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<37h194F50j4pkU1@individual.net>
	<7xfyzwehq7.fsf@ruckus.brouhaha.com>
	<37h2keF5a2ijjU1@individual.net>
	<7xwtt8a7vu.fsf@ruckus.brouhaha.com>
Message-ID: <37h5d6F5ck38lU1@individual.net>

> The issue with using an rdbms is not with the small amount of code
> needed to connect to it and query it, but in the overhead of

Its not only connecting - its creating (automaticall if necessary) and
"connecting" which is actually only opening.

> installing the huge piece of software (the rdbms) itself, and keeping
> the rdbms server running all the time so the infrequently used app can
> connect to it.  ZODB is also a big piece of software to install.  Is
> it at least 100% Python with no C modules required?  Does it need a
> separate server process?  If it needs either C modules or a separate
> server, it really can't be called a low-end strategy.

It has to be installed. And it has C-modules - but I don't see that as a
problem. Of course this is my personal opinion - but it's certainly easier
installed than to cough up your own transaction isolated persistence layer.
I started using it over pickle when my multi-threaded app caused pickle to
crash.

ZODB does not have a server-process, and no external setup beyond the
installation of the module itself.

Even if you consider installing it as too heavy for your current needs, you
should skim over the tutorial to get a grasp of how it works. 

-- 
Regards,

Diez B. Roggisch


From grante at visi.com  Tue Feb  1 12:21:01 2005
From: grante at visi.com (Grant Edwards)
Date: 01 Feb 2005 17:21:01 GMT
Subject: Where are list methods documented?
Message-ID: <41ffba7d$0$15879$a1866201@visi.com>

I'm trying to figure out how to sort a list, and I've run into
a problem that that I have tripped over constantly for years:
where are the methods of basic types documented?  The only
thing I can find on a list's sort() method is in the tutorial
where it states:

   sort()
       Sort the items of the list, in place. 

Doesn't the list method would accept a callable to be used as a
comparison function?  Where is that sort of thing in the
documentation?  I've looking in the library reference, the
language reference, the global module index.

I have figured out I can do 

>>> list.sort.__doc__
'L.sort(cmpfunc=None) -- stable sort *IN PLACE*; cmpfunc(x, y) -> -1, 0, 1'

-- 
Grant Edwards                   grante             Yow!  But they went to MARS
                                  at               around 1953!!
                               visi.com            


From tonino.greco at gmail.com  Thu Feb 17 07:48:19 2005
From: tonino.greco at gmail.com (Tonino)
Date: 17 Feb 2005 04:48:19 -0800
Subject: gui scripting
In-Reply-To: <3c18c08f.0502142309.3e52fdbe@posting.google.com>
References: <1108381881.828494.98340@c13g2000cwb.googlegroups.com>
	<gm27e2-m6i.ln1@lairds.us>
	<3c18c08f.0502142309.3e52fdbe@posting.google.com>
Message-ID: <1108644499.036064.47210@z14g2000cwz.googlegroups.com>

hi,

thanks - am already involved in a process to modify winguiauto.py  -
this is a GREAT start but we need more control and better handleing ;)

Thanks for the WATSUP site - will check on this as well ;)

Thanks
T



From fredrik at pythonware.com  Tue Feb  8 05:18:31 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 11:18:31 +0100
Subject: Big development in the GUI realm
References: <mailman.2123.1107820051.22381.python-list@python.org><4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com><cu95nd$7cr$1@news1.ucsd.edu><6h7g0113up1v76k7qkad7bt17os1q73510@4ax.com><4208237b$0$21623$a1866201@visi.com>	<cu98n4$833$1@news1.ucsd.edu><4208373e$0$21620$a1866201@visi.com>	<cu9eg0$9jb$1@news1.ucsd.edu><mailman.2149.1107853311.22381.python-list@python.org>
	<cua0eq$ecj$1@news1.ucsd.edu>
Message-ID: <cua3j4$hv7$1@sea.gmane.org>

Robert Kern wrote:

> Fair enough. The only time I've seen it in dead-tree print was in Heinlein's _Time Enough For 
> Love_, unattributed to anyone else.

if that's true, it would seem that it predates the Hanlon reference by a
couple of years:

    http://www.statusq.org/archives/2001/12/04

on the other hand, Google tells me that "Time Enough For Love" con-
tains a couple of other famous stupidity quotes, including:

    "Never underestimate the power of human stupidity"

do you still have a copy of the book?  (preferrably a version printed
before 1980...)

</F> 





From news at NOwillmcguganSPAM.com  Thu Feb 17 13:20:36 2005
From: news at NOwillmcguganSPAM.com (Will McGugan)
Date: Thu, 17 Feb 2005 18:20:36 +0000
Subject: namespace collisions
Message-ID: <4214e074$0$32617$db0fefd9@news.zen.co.uk>

Hi,

I'm accumulating a number of small functions, which I have sensibly put 
in a single file called 'util.py'. But it occurs to me that with such a 
generic name it could cause problems with other modules not written by 
myself. Whats the best way of handling this? If I put it in a common 
location in my Python path, should I call it willsutil.py?

TIA,

Will McGugan


From tdelaney at avaya.com  Wed Feb 16 18:03:01 2005
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Thu, 17 Feb 2005 10:03:01 +1100
Subject: Why doesn't join() call str() on its arguments?
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE02520373@au3010avexu1.global.avaya.com>

John Roth wrote:

> result = "".join([str(x) for x in list])

As of 2.4, you should use a generator expression here instead (unless
you require backwards-compatibility with 2.3).

    result = ''.join(str(x) for x in iterable)

Easier to read, more memory-efficient, potentially faster (depending on
performance characteristics of building large lists).

Tim Delaney


From rbt at athop1.ath.vt.edu  Fri Feb  4 14:49:43 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Fri, 04 Feb 2005 14:49:43 -0500
Subject: string issue
In-Reply-To: <R4QMd.33663$EG1.10366@lakeread04>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu> <R4QMd.33663$EG1.10366@lakeread04>
Message-ID: <cu0jkn$kf7$3@solaris.cc.vt.edu>

Alan McIntyre wrote:
> I think it's because you're modifying the list as you're iterating over 

In this case then, shouldn't my 'except Exception' raise an error or 
warning like:

"Hey, stupid, you can't iterate and object and change it at the same time!"

Or, perhaps something similar?


From gargonx at gmail.com  Sat Feb 12 21:36:04 2005
From: gargonx at gmail.com (gargonx)
Date: 12 Feb 2005 18:36:04 -0800
Subject: help please
In-Reply-To: <TPKdnU2eEu9xPJPfRVn-vg@comcast.com>
References: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
	<TPKdnU2eEu9xPJPfRVn-vg@comcast.com>
Message-ID: <1108262164.483241.274380@z14g2000cwz.googlegroups.com>

Thanks that works very well



From fredrik at pythonware.com  Mon Feb 14 17:26:18 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 23:26:18 +0100
Subject: [NewBie] Tut0r Thing
References: <614c778e.0502141413.6b19c091@posting.google.com>
Message-ID: <cur8d8$m30$1@sea.gmane.org>

"administrata" wrote:

>I logged in.
>
> But, don't know how to use it.
>
> and What the hell is digest thing?
>
> Is Tutor Thing like i send questions to someone by e-mailing
>
> and get answers?

without any further details, your post makes very little sense.

if you're talking about the "tutor at python.org" mailing list, it's a mailing list
that you send mail to and get mails from, as explained on the tutor mailing
list page:

    http://mail.python.org/mailman/listinfo/tutor

if you prefer alternative interfaces, use gmane:

    http://dir.gmane.org/gmane.comp.python.tutor

</F> 





From max at alcyone.com  Tue Feb  1 19:05:03 2005
From: max at alcyone.com (Erik Max Francis)
Date: Tue, 01 Feb 2005 16:05:03 -0800
Subject: [perl-python] string pattern matching
In-Reply-To: <2uWdnWyp5M1Fip3fRVn-sQ@rogers.com>
References: <1107290707.549792.199860@c13g2000cwb.googlegroups.com>
	<mailman.1716.1107300060.22381.python-list@python.org>
	<2uWdnWyp5M1Fip3fRVn-sQ@rogers.com>
Message-ID: <fbydnQJ8DNSthJ3fRVn-pw@speakeasy.net>

Dan Perl wrote:

> Perhaps someone will write a program to automatically follow up on every 
> [perl-python] posting?  The follow-up could just contain a statement like 
> the one Daniel mentions.  Obviously the program would be written in python. 
> ;-)

I'm not really sure that such a disclaimer is explicitly necessary. 
Anyone looking at Xah Lee's posts will also see the threads they 
generate, which involve people pointing out all their errors.  Granted 
this won't happen with every single post, but since he's posting this 
stuff once a day, I don't think the chances of someone finding his posts 
and not seeing the related discussion and refutations is a big risk.

For the rest of us, we can just killfile the threads easily enough.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   Little things / Cut like knives / Hurt and sting
   -- Anggun


From philippecmartin at sbcglobal.net  Fri Feb 11 18:26:15 2005
From: philippecmartin at sbcglobal.net (Philippe C. Martin)
Date: Fri, 11 Feb 2005 17:26:15 -0600
Subject: dos box appears when clicking .pyc
Message-ID: <1108164375.8205.2.camel@pcmsc>

Hi,


For a few months now, I have been used .pyc script under XP without
getting the "DOS" box.

I just re-installed the scripts on another XP box and am now getting the
DOS box !

Something to do with the registry ?

Regards,

Philippe





-- 
***************************
Philippe C. Martin
SnakeCard LLC
www.snakecard.com
***************************



From deetsNOSPAM at web.de  Fri Feb  4 05:47:21 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 04 Feb 2005 11:47:21 +0100
Subject: Regular expression match objects - compact syntax?
References: <mailman.1853.1107473468.22381.python-list@python.org>
Message-ID: <36h201F52b06iU1@individual.net>

Johann C. Rocholl wrote:

> 
> How do you people handle this?

Usually we don't bothe too much. But it has been suggested to do something
like this:

class Matcher:
    def __init__(self, rex):
       self.rex = rex

    def match(self, s):
       self.m = self.rex.match(s)
       return not self.m is None

Then you can do

m = Matcher(rex)

if m.match(line):
    print m.m


Of course you can enhance the class mather so that all methods it does not
define by itself are delegated to self.m, which would be more convient. But
I'm currently too lazy to write that down :)
-- 
Regards,

Diez B. Roggisch


From Scott.Daniels at Acm.Org  Sat Feb 12 16:38:15 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 12 Feb 2005 13:38:15 -0800
Subject: For American numbers
Message-ID: <420e7376$1@nntp0.pdx.net>

Kind of fun exercise (no good for British English).

     def units(value, units='bytes'):
         magnitude = abs(value)
         if magnitude >= 1000:
             for prefix in ['kilo mega giga tera peta '
                            'exa zetta yotta').split():
                 magnitude /= 1000.
                 if magnitude < 1000.:
                     break
         elif magnitude < 1:
             for prefix in ('milli micro nano pico femto '
                            'atto zepto yocto'.split():
                 magnitude *= 1000.
                 if magnitude >= 1.0:
                     break
             if magnitude < .001:
                 return 'zero %s' % units
         else:
             prefix = ''
         if value < 0:
             return '-%.3f %s%s' % (magnitude, prefix, units)
         return '%.3f %s%s' % (magnitude, prefix, units)

--Scott David Daniels
Scott.Daniels at Acm.Org



From ncoghlan at iinet.net.au  Sat Feb 12 22:54:44 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 13 Feb 2005 13:54:44 +1000
Subject: For American numbers
In-Reply-To: <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
References: <420e7376$1@nntp0.pdx.net> <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
Message-ID: <420ECF84.2000101@iinet.net.au>

Peter Hansen wrote:
> Only for hard drive manufacturers, perhaps.
> 
> For the rest of the computer world, unless I've missed
> a changing of the guard or something, "kilo" is 1024
> and "mega" is 1024*1024 and so forth...

Given that there are perfectly good ISO prefixes for the multiples of 2**10, I 
don't see any reason to continue misusing the 10**3 prefixes for the purpose.

It may be an uphill slog, but the fact that the CS usage is ambiguous at best, 
and just plain wrong at worst, gives me hope :)

The hard drive guys are just leading the charge because it makes for better 
marketing copy. . .

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From deetsNOSPAM at web.de  Mon Feb 14 07:38:47 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 14 Feb 2005 13:38:47 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr>
Message-ID: <37bkemF5a7s7vU1@individual.net>

> One of the most funny things within open-source is that switching:
> 
> first:
> "we have powerfull solutions which beat this and that"
> 
> then:
> "hey, this is just volunteer work"
> 

I don't see the contradiction here. It beats a great deal of commercial
solutions in a lot of ways. But not on every single one of these. And the
_reason_ for beating commercial software in certain aspects is exactly that
somebody stood up and volunteered. Obviously you aren't interested in the
more labour-intensive parts of the os-development.

> 
> But if those answers above were of official nature, I must seriously
> rethink if I can rely on _any_ system which is based on python, as the
> foundation and the community do not care about essential needs and
> requirements.

They might not care about _your_ perceived essential needs. But as lots of
people use python and python based solutions with great commercial success,
you might think of reviewing your needs more critical. After all, there is
no _perfect_ system for all needs.

-- 
Regards,

Diez B. Roggisch


From steven.bethard at gmail.com  Mon Feb  7 14:30:08 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 07 Feb 2005 12:30:08 -0700
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <mailman.2099.1107802768.22381.python-list@python.org>
References: <dvOMd.33656$EG1.19314@lakeread04>	<mailman.2093.1107799636.22381.python-list@python.org>	<6uSdnfAuvOkvL5rfRVn-3Q@comcast.com>
	<mailman.2099.1107802768.22381.python-list@python.org>
Message-ID: <CdydnQBDEpwmXJrfRVn-1g@comcast.com>

Francis Girard wrote:
> Is there someone on this list using this tool and happy with it ? Or is my 
> mind too much targeted on FP paradigm and most of you really think that all 
> the functions that apply another function to each and every elements of a 
> list are bad (like "reduce", "map", "filter") ?

I know there are definitely proponents for map and filter, especially 
for simple cases like:

     map(int, lst)
     filter(str.strip, lst)

Note that, unlike reduce, map and filter aren't really going to increase 
the number of function calls.  Consider the equivalent list comprehensions:

     [int(x) for x in lst]
     [x for x in lst if str.strip(x)]    [1]

The list comprehensions also require the same number of function calls 
in these cases.  Of course, in cases where a function does not already 
exist, map and filter will require more function calls.  Compare:

     map(lambda x: x**2 + 1, lst)

with

     [x**2 + 1 for x in lst]

Where the LC allows you to essentially "inline" the function.  (You can 
dis.dis these to see the difference if you like.)


As far as my personal preferences go, while the simple cases of map and 
filter (the ones using existing functions) are certainly easy enough for 
me to read, for more complicated cases, I find things like:

     [x**2 + 1 for x in lst]
     [x for x in lst if (x**2 + 1) % 3 == 1]

much more readable than the corresponding:

     map(lambda x: x**2 + 1, lst)
     filter(lambda x: (x**2 + 1) % 3 == 1, lst)

especially since I avoid lambda usage, and would have to write these as:

     def f1(x):
         return x**2 + 1
     map(f1, lst)

     def f2(x):
         return (x**2 + 1) % 3 == 1
     map(f2, lst)

(I actually find the non-lambda code clearer, but still more complicated 
than the list comprehensions.)

Given that I use list comprehensions for the complicated cases, I find 
it to be more consistent if I use list comprehensions in all cases, so I 
even tend to avoid the simple map and filter cases.


As far as reduce goes, I've never seen code that I thought was clearer 
using reduce than using a for-loop.  I have some experience with FP, and 
I can certainly figure out what a given reduce call is doing given 
enough time, but I can always understand the for-loop version much more 
quickly.


Of course, YMMV.

STeVe


[1] While it's not technically equivalent, this would almost certainly 
be written as:
     [x for x in lst if x.strip()]
which in fact takes better advantage of Python's duck-typing -- it will 
work for unicode objects too.


From removethis.kartic.krishnamurthy at gmail.com  Wed Feb 23 13:41:51 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Wed, 23 Feb 2005 18:41:51 GMT
Subject: reading only new messages in imaplib
In-Reply-To: <1109132642.962280.252070@g14g2000cwa.googlegroups.com>
References: <1109132642.962280.252070@g14g2000cwa.googlegroups.com>
Message-ID: <P74Td.25712$vK5.16410@twister.nyroc.rr.com>

Raghul said the following on 2/22/2005 11:24 PM:
> Is it posssible to read only the new messages or unread messages using
> imaplib in python? If it is possible pls specify the module or give a
> sample code.
> 
> Thanks in advance
> 


import imaplib, sys

conn = imaplib.IMAP4_SSL(host='mail.example.com')
# or conn =imaplib.IMAP4(host='mail.example.com') for no SSL

try:
	(retcode, capabilities) = conn.login('user', 'pass')
except:
	print sys.exc_info()[1]
	sys.exit(1)
conn.select(readonly=1) # Select inbox or default namespace
(retcode, messages) = conn.search(None, '(UNSEEN)')
if retcode == 'OK':
	for message in messages[0].split(' '):
		print 'Processing :', message
		(ret, mesginfo) = conn.fetch(message, '(BODY[HEADER.FIELDS (SUBJECT 
FROM)])')
		if ret == 'OK':
			print mesginfo,'\n',30*'-'
conn.close()


Please also go thru the IMAP RFC to learn more about the flags field and 
the IMAP protocol in general. If you're developing something serious 
using IMAP, it will be very beneficial to you to understand the protocol.

http://www.imap.org/papers/biblio.html

Thanks,
-Kartic


From deetsNOSPAM at web.de  Mon Feb 21 07:16:13 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 21 Feb 2005 13:16:13 +0100
Subject: functions and named keyword arguments
References: <1108987745.605901.75090@l41g2000cwc.googlegroups.com>
Message-ID: <37u1mcF5hu7ohU1@individual.net>

> Sorry if this is a duplicate - I use the google interface and sometiems
> it screws up (not showing stuff you've posted *or* not posting it).
> Before you ask it's because at work I have no NNTP and *heavily*
> restricted http.

It is - so I requote my answer :)


Im not sure if I understand you fully, but if what you are after is how to
pass named parameters analog to positional args, do it as dict:

def foo(name=None):
????print?name

foo(**{name: "Fuzzy"})

-- 
Regards,

Diez B. Roggisch


From eurleif at ecritters.biz  Sat Feb  5 02:38:13 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sat, 05 Feb 2005 02:38:13 -0500
Subject: empty classes as c structs?
In-Reply-To: <6%PMd.33662$EG1.31801@lakeread04>
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<6%PMd.33662$EG1.31801@lakeread04>
Message-ID: <36jb88F521hqhU1@individual.net>

Alan McIntyre wrote:
> You could do something like this:
> 
> blah = type('Struct', (), {})()
> blah.some_field = x
> 
> I think I'd only do this if I needed to construct objects at runtime 
> based on information that I don't have at compile time, since the two 
> lines of code for your empty class would probably be more recognizable 
> to more people.

Actually, in Python, class definitions are runtime executable statements 
just like any other. You can do this:

 >>> def make_class(with_spam=True):
...  if with_spam:
...   class TheClass(object):
...    def dostuff(self):
...     print 'Spam, spam, spam, spam!'
...  else:
...   class TheClass(object):
...    def dostuff(self):
...     print "I don't like spam!"
...  return TheClass
...
 >>> make_class(True)().dostuff()
Spam, spam, spam, spam!
 >>> make_class(False)().dostuff()
I don't like spam!

And this:

 >>> class Foo(object):
...  num = 3
...  for _ in xrange(14):
...   num *= 1.22
...
 >>> Foo.num
48.546607267977542


From gdamjan at gmail.com  Tue Feb  8 14:38:10 2005
From: gdamjan at gmail.com (Damjan)
Date: Tue, 08 Feb 2005 20:38:10 +0100
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<4207c8db$0$21623$a1866201@visi.com>
	<cub12p$pke$1@achot.icm.edu.pl>
Message-ID: <36sip2F56jjmaU1@individual.net>

> However, imagine simple situation:
> 1. I write proprietary program with open plugin api. I even make the api
> itself public domain. Program works by itself, does not contain any
> GPL-ed code.
> 2. Later someone writes plugin using the api (which is public domain so
> is GPL compatible), plugin gets loaded into my software, significantly
> affecting its functionality (UI, operations, file formats, whatever).
> 3. Someone downloads the plugin and loads it into my program

I don't think it is legal to distribute the plugin in binary form. 
OTOH it should be legal to distribute it as source code.
 
> Am I bound by GPL? Certainly not, I did not sign or agree to it in way.

correct


-- 
damjan


From jeremy+plusnews at jeremysanders.net  Fri Feb 25 10:55:31 2005
From: jeremy+plusnews at jeremysanders.net (Jeremy Sanders)
Date: Fri, 25 Feb 2005 15:55:31 +0000
Subject: Splitting strings - by iterators?
Message-ID: <pan.2005.02.25.15.55.31.77881@jeremysanders.net>

I have a large string containing lines of text separated by '\n'. I'm
currently using text.splitlines(True) to break the text into lines, and
I'm iterating over the resulting list.

This is very slow (when using 400000 lines!). Other than dumping the
string to a file, and reading it back using the file iterator, is there a
way to quickly iterate over the lines?

I tried using newpos=text.find('\n', pos), and returning the chopped text
text[pos:newpos+1], but this is much slower than splitlines.

Any ideas?

Thanks

Jeremy



From ncoghlan at iinet.net.au  Sat Feb 12 21:08:26 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 13 Feb 2005 12:08:26 +1000
Subject: Alternative to raw_input ?
In-Reply-To: <my27ag7r6ca1$.wfp66yydaeqw$.dlg@40tude.net>
References: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>	<mailman.2400.1108139722.22381.python-list@python.org>	<w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>	<cuio9f$13k8$1@ns.felk.cvut.cz>	<ckkuclxhhrv7$.1lqqmenvnqvg5$.dlg@40tude.net>	<MKSdnYiccMgv8ZDfRVn-hg@powergate.ca>
	<my27ag7r6ca1$.wfp66yydaeqw$.dlg@40tude.net>
Message-ID: <420EB69A.40705@iinet.net.au>

BOOGIEMAN wrote:
> On Fri, 11 Feb 2005 21:38:47 -0500, Peter Hansen wrote:
> 
> 
>>print prompt
>>while msvcrt.kbhit():
>>     msvcrt.getch()
>>msvcrt.getch()
> 
> 
> Thanks, it works but without line "print prompt" and also
> I'm not sure if I should put this function :
> 
> def cekaj():
>     while msvcrt.kbhit():
>         msvcrt.getch()
>     msvcrt.getch()
> 
> #Or this one, which sounds more logical according to help
> #kbhit() - Return true if a keypress is waiting to be read. 
> 
> def cekaj():
>     msvcrt.getch()
>     while msvcrt.kbhit():
>         msvcrt.getch()
>      
> It works both ways, not sure which one is right

Try this:

print "Hit a key!"
cekaj()
print "Nap time!"
time.sleep(15)
print "Hit another key!"
cekaj()

with the two different implementations, and see what happens if you hit a key 
when the 'Nap Time!' prompt appears.

Cheers,
Nick.

P.S. You probably actually want an implementation that looks like:

def cekaj(prompt="Press a key to continue"):
     while msvcrt.kbhit():
         msvcrt.getch()
     if prompt is not None:
         print prompt
     msvcrt.getch()

And the sample program would look like:
cekaj("Hit a key!")
print "Nap time!"
time.sleep(15)
cekaj("Hit another key!")

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From jacek.generowicz at cern.ch  Tue Feb  1 06:18:17 2005
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 01 Feb 2005 12:18:17 +0100
Subject: type of simple object
References: <1107255752.258025.50870@z14g2000cwz.googlegroups.com>
Message-ID: <tyfbrb4msue.fsf@pcepsft001.cern.ch>

"ajikoe at gmail.com" <ajikoe at gmail.com> writes:

> How do I know type of simple object is tuple or list or integer, for
> example my function should understand what is the object type passed in
> its argument


Answers ordered in decreasing degree of Pythonicity:

1) You are mistaken, the function almost certainly should not care
   whether the object is a tuple or a list (or integer)[1].

2) isinstance(obj, list) etc.

3) type(obj)



[1] You probably want to check whether the object is capable of doing
    whatever it is that you expect lists or tuples to do for you. For
    example: 


        def total(object):
            try:
                return sum(object) # The list-or-tuple case
            except TypeError:
                return object      # The integer case



From rschroev_nospam_ml at fastmail.fm  Sun Feb 27 10:30:13 2005
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sun, 27 Feb 2005 15:30:13 GMT
Subject: lambda strangeness??
In-Reply-To: <544321d0cjhv9925dkopsumiqg7m52em0i@4ax.com>
References: <v73321hkh2v7bhrnj7enet296entdj5drb@4ax.com>
	<544321d0cjhv9925dkopsumiqg7m52em0i@4ax.com>
Message-ID: <9IlUd.22242$0m3.2712636@phobos.telenet-ops.be>

Alan Gauld wrote:
> On Sun, 27 Feb 2005 09:07:28 +0000 (UTC), Alan Gauld
> <alan.gauld at btinternet.com> wrote:
> 
> 
>>>>>adds = [lambda y: (y + n) for n in range(10)]
>>>>>adds[0](0)
>>
>>9
>>
>>>>>for n in range(5): print adds[n](42)
>>
>>...
>>42
>>43
> 
> 
>>the for loop... It seems to somehow be related to the 
>>last value in the range(), am I somehow picking that up as y?
> 
> 
> Further exploration suggests I'm picking it up as n not y, if
> that indeed is what's happening...

Your intent is to create lambda's that are equivalent to

adds[0] = lambda y: y + 0
adds[1] = lambda y: y + 1
etc.

but what actually happens is that you get lambda's that are equivalent to

adds[0] = lambda y: y + n
adds[1] = lambda y: y + n
etc.

which obviously depend on the value of n at the moment you call the lambda.

-- 
"Codito ergo sum"
Roel Schroeven


From leo.hatvani at gmail.com  Sun Feb 20 13:55:17 2005
From: leo.hatvani at gmail.com (Tortelini)
Date: 20 Feb 2005 10:55:17 -0800
Subject: BaseHTTPServer threading using SocketServer.ThreadingMixIn
References: <1108910973.117326.206390@f14g2000cwb.googlegroups.com>
	<7x1xbbw9n8.fsf@ruckus.brouhaha.com>
Message-ID: <1108925717.954679.324920@c13g2000cwb.googlegroups.com>

It's not that, here is definition that I use:
class myWebServer(SocketServer.ThreadingMixIn,
BaseHTTPServer.HTTPServer):
  pass

code that runs server:
server = myWebServer(('', 80), myWebHTTPHandler)
LOG("Web Server starting")
server.serve_forever()

and here is shortened version of myWebHTTPHandler:
class myWebHTTPHandler(BaseHTTPServer.BaseHTTPRequestHandler):
    sys_version=""
    server_version=versionString

    def log_request(self, code='-', size='-'):
        pass

    def do_GET(self):
        my GET code...
    
    def do_POST(self):
        my POST code...



From cappy2112 at gmail.com  Wed Feb  9 20:14:38 2005
From: cappy2112 at gmail.com (Cappy2112)
Date: 9 Feb 2005 17:14:38 -0800
Subject: convert list of tuples into several lists
In-Reply-To: <36uihlF58p63iU1@individual.net>
References: <cud40u$vqb$01$1@news.t-online.com>
	<36uihlF58p63iU1@individual.net>
Message-ID: <1107998078.610891.111510@z14g2000cwz.googlegroups.com>

What does the leading * do?



From dominic.fox at gmail.com  Fri Feb 11 12:11:28 2005
From: dominic.fox at gmail.com (Dominic Fox)
Date: Fri, 11 Feb 2005 17:11:28 +0000
Subject: Concurrent Python
Message-ID: <f278b213050211091151904389@mail.gmail.com>

I've created a few classes to support some concurrent programming
concepts in Python:

AsyncResult represents the state of a process currently running in a
separate thread.
MultiEvent allows listeners to wait for any one of a list of events to
be signalled.
MultiQueue allows listeners to wait for an item to be added to any one
of a list of queues.
DataflowObject can be used to block while waiting for a
single-assignment variable to be bound.

The code can be found here:

http://www.codepoetics.com/code/concurrent.py

Comments and constructive criticism welcome.

regards,
Dominic


From jepler at unpythonic.net  Sat Feb 26 20:37:00 2005
From: jepler at unpythonic.net (jepler at unpythonic.net)
Date: Sat, 26 Feb 2005 19:37:00 -0600
Subject: Xlib in Python? I need XDrawString()
In-Reply-To: <pan.2005.02.27.00.09.22.178913@yahoo.com>
References: <pan.2005.02.27.00.09.22.178913@yahoo.com>
Message-ID: <20050227013657.GA2765@unpythonic.net>

python-xlib may not see any development, but I used it recently with python 2.2
or 2.3, and don't remember any particular problems doing so.

you may want to give it a try, instead of dismissing it out of hand.

Jeff
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From Andreas.Ames at comergo.com  Mon Feb 14 13:06:35 2005
From: Andreas.Ames at comergo.com (Ames Andreas)
Date: Mon, 14 Feb 2005 19:06:35 +0100
Subject: Second posting - Howto connect to MsSQL
Message-ID: <788E231C269961418F38D3E360D1652526CA7A@tndefr-ws00021.tenovis.corp.lan>

Hello,

John Fabiani wrote:

> Are there others using Python to connect MsSQL?  At the moment I'd
> accept even a windows solution - although, I'm looking for a Linux
> solution.

You'll need to get one out of each category:

1) ODBC manager: unixOdbc or iOdbc

2) Python ODBC wrapper: mxOdbc (www.egenix.com)

3) ODBC driver:  either a commercial one or the freetds driver
   (www.freetds.org)


HTH,

aa

-- 
Andreas Ames | Programmer | Comergo GmbH | 
Voice:  +49 69 7505 3213 | andreas . ames AT comergo . com



From pierre.barbier at cirad.fr  Wed Feb  2 09:01:49 2005
From: pierre.barbier at cirad.fr (Pierre Barbier de Reuille)
Date: Wed, 02 Feb 2005 15:01:49 +0100
Subject: Is this a contradiction in the docs ?
In-Reply-To: <1107349293.858397.127620@f14g2000cwb.googlegroups.com>
References: <1107342032.273119.194120@o13g2000cwo.googlegroups.com>
	<4200c8a6$0$518$626a14ce@news.free.fr>
	<1107349293.858397.127620@f14g2000cwb.googlegroups.com>
Message-ID: <4200dccb$0$26664$636a15ce@news.free.fr>

Fuzzyman a ?crit :
> 
> 
> Yes.. but that would mean that eval could only run code objects that
> "consist[s] of a single expression".. which I doubt is the reality or
> the intention.
> 
> Regards,
> Fuzzyman
> http://www.voidspace.org.uk/python/index.shtml
> 

[Sorry, I deleted the commented lines because they were completely 
unreadable anyway]

It's exactly what eval is for : evaluate a single expression and return 
its result ! Try with strings : you can't even evaluate a statement ! 
You can only evaluate an expression !

And what would be the return result of a sequence of statement ?

If you want to execute a sequence, you want to use exec, not eval ...

Pierre


From nessus at mit.edu  Sat Feb 26 01:59:13 2005
From: nessus at mit.edu (Douglas Alan)
Date: Sat, 26 Feb 2005 01:59:13 -0500
Subject: Canonical way of dealing with null-separated lines?
References: <lcll9efw8l.fsf@gaffa.mit.edu>
	<mailman.3006.1109264015.22381.python-list@python.org>
	<5aes11d4da95un1n78vtb04m43269hqo4m@4ax.com>
	<mailman.3020.1109281886.22381.python-list@python.org>
Message-ID: <lc7jkvdcxq.fsf@gaffa.mit.edu>

Okay, here's the definitive version (or so say I).  Some good doobie
please make sure it makes its way into the standard library:

def fileLineIter(inputFile, newline='\n', leaveNewline=False, readSize=8192):
   """Like the normal file iter but you can set what string indicates newline.

   You can also set the read size and control whether or not the newline string
   is left on the end of the iterated lines.  Setting newline to '\0' is
   particularly good for use with an input file created with something like
   "os.popen('find -print0')".
   """
   partialLine = []
   while True:
      charsJustRead = inputFile.read(readSize)
      if not charsJustRead: break
      lines = charsJustRead.split(newline)
      if len(lines) > 1:
         partialLine.append(lines[0])
         lines[0] = "".join(partialLine)
         partialLine = [lines.pop()]
      else:
         partialLine.append(lines.pop())
      for line in lines: yield line + ("", newline)[leaveNewline]
   if partialLine and partialLine[-1] != '': yield "".join(partialLine)

|>oug


From ruach at chpc.utah.edu  Fri Feb 11 15:27:18 2005
From: ruach at chpc.utah.edu (Matthew Thorley)
Date: Fri, 11 Feb 2005 13:27:18 -0700
Subject: problem with tk and pass by refference (I think :)
In-Reply-To: <cuj41r$muq$02$1@news.t-online.com>
References: <cuitgv$r4i$1@vegh.ks.cc.utah.edu>
	<cuiv3n$681$04$1@news.t-online.com>
	<cuj3os$1t2$1@vegh.ks.cc.utah.edu>
	<cuj41r$muq$02$1@news.t-online.com>
Message-ID: <cuj4gt$26g$1@vegh.ks.cc.utah.edu>

Diez B. Roggisch wrote:
>>I tried it but I got a syntax error. The interpreter didn't like the
>>equals sign in the lambda. I am using python 2.3.4. Is there another way
>>of writing that?
> 
> 
> Strange. This script works and shows the desired behaviour - python is also
> 2.3.4:
> 
> def foo(x):
>     print x
> 
> 
> fs = [lambda: foo(i) for i in xrange(5)]
> for f in fs:
>     f()
> 
> fs = [lambda x=i: foo(x) for i in xrange(5)]
> for f in fs:
>     f()
> 
> 
You're right! It was my fault. I left the colon after the lambda by 
mistake. e.g. lambda: num=verseNum:...

Thanks very much for the help it works great now! I wish I would have 
asked somebody sooner :)
-Matthew


From fuzzyman at gmail.com  Wed Feb  2 11:13:51 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 2 Feb 2005 08:13:51 -0800
Subject: CONTEST - What is the (best) solution?
In-Reply-To: <qY-dneb-0f5iZ53fRVn-vw@comcast.com>
References: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
	<qY-dneb-0f5iZ53fRVn-vw@comcast.com>
Message-ID: <1107360831.659521.46460@z14g2000cwz.googlegroups.com>

Doesn't work if '{' or '}' can appear in the values.........
Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From ne-nospam7 at post.cybercity.dk  Tue Feb 22 13:05:30 2005
From: ne-nospam7 at post.cybercity.dk (Nils Emil P. Larsen)
Date: Tue, 22 Feb 2005 19:05:30 +0100
Subject: Comm. between Python and PHP
Message-ID: <lnsm11d91ug2gfh5gjvutga4dthhg0rjbf@4ax.com>

Hello

I'm building a daemon in Python. It will measure and control some
physical devices on a serial bus. Since it is a daemon, it will never
terminate and I can't interfere with the regulation of the devices by
using command line parameters. I want to control the regulation by
using a Internet browser.

What is the easiest way to make my threaded Python daemon communicate
with a PHP-script running from Apache2 on localhost?

Thank you so far!

Nils Emil P. Larsen
--
My reply-address is valid.           www.bios-flash.dk
Min svar-adresse er gyldig.      Redning af d?de BIOS'er


From steven.bethard at gmail.com  Fri Feb 25 01:04:48 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 24 Feb 2005 23:04:48 -0700
Subject: Output File
In-Reply-To: <Xa2dnWeU9v84KYPfRVn-jQ@adelphia.com>
References: <Xa2dnWeU9v84KYPfRVn-jQ@adelphia.com>
Message-ID: <67-dndUDN9NiIoPfRVn-3A@comcast.com>

Samantha wrote:
> input = open(r'C:\Documents and Settings\Owner\Desktop\somefile.html','r')
> L = input.readlines()
> input.close
> 
> output = open(r'C:\Documents and 
> Settings\Owner\Desktop\somefile_test.html','w')
> for t in range(len(L)):
>  output.writelines(L[t])
> output.close

I think you want to do [1]:

input = open(r'somefile.html', 'r')
lst = input.readlines()
input.close() # note the () -- this is a method call

output = open(r'somefile_test.html', 'w')
output.writelines(lst) # not in a for-loop
output.close() # note the () -- this is a method call

If you really want to use a for-loop, the code should look like:

for line in L:
     output.write(line)

If you call writelines when you only want to write one line, you're 
going to get odd behavior -- Python's going to interpret each character 
in your line as a "line" itself.

> Also is there a way to test for EOF in Python?

file.read() or file.readline() will return '' if you have reached the 
end of the file.

STeVe

[1] In fact, what you really probably want to do is to take advantage of 
the fact that a file is an iterator.  You can write:

input = open(r'somefile.html', 'r')
output = open(r'somefile_test.html', 'w')
output.writelines(input)

And the lines of somefile.html will be written to somefile_test.html. 
You might also look at the shutil module.


From eric_brunel at despammed.com  Tue Feb 22 09:30:10 2005
From: eric_brunel at despammed.com (Eric Brunel)
Date: Tue, 22 Feb 2005 15:30:10 +0100
Subject: 'modal dialogs' with Tkinter
References: <e5063e96.0502220603.4163be98@posting.google.com>
Message-ID: <opsmlrwkkgrqur0o@eb.pragmadev>

On 22 Feb 2005 06:03:14 -0800, Sean McIlroy <sean_mcilroy at yahoo.com> wrote:

> I'd like to have a function f such that, when f is invoked, a Tk
> window w is presented in which a number of variables can be modified,
> and f returns the values that are indicated by the relevant
> menus/checkbuttons/etc at the time w gets closed. I've tried various
> ways of doing this, without success. Any assistance would be greatly
> appreciated.

Here are the necessary ritual incantations to create a modal dialog with Tkinter:

dlg = Toplevel()
# ... build the window ...
## Set the focus on dialog window (needed on Windows)
dlg.focus_set()
## Make sure events only go to our dialog
dlg.grab_set()
## Make sure dialog stays on top of its parent window (if needed)
dlg.transient(parentWdw)
## Display the window and wait for it to close
dlg.wait_window(dlg)

The callbacks for your "OK", "Cancel" or whatever buttons you want to use should then call dlg.destroy(). This will terminate the wait_window call and continue the execution of the code after it.

HTH
  - Eric Brunel -


From snacktime at gmail.com  Mon Feb  7 23:13:01 2005
From: snacktime at gmail.com (snacktime)
Date: Mon, 7 Feb 2005 20:13:01 -0800
Subject: Problems with python and threads under Freebsd
In-Reply-To: <cu8p1f$g9n$1@online.de>
References: <mailman.2101.1107803855.22381.python-list@python.org>
	<cu8p1f$g9n$1@online.de>
Message-ID: <1f060c4c05020720136cf5b3f@mail.gmail.com>

This is a followup with some more information.  The program is written
in twisted and I posted this to twisted-python also.  The freebsd list
wants a more detailed backtrace, which even with python compiled with
OPT -g and --with-pydebug isn't happening for some reason.

The script below calls a blocking method using deferToThread.  When I
have 5 or so clients all hitting it at the same time I get a segfault
or bus error within minutes.
I recompiled python with --with-pydebug and set OPT to -g, but it
didn't give me any more information in the backtrace which is also
below.   Then I ran gdb on the server process and something funny
happened.  I didn't get a segfault, but the server started catching
exceptions and printing them to the screen.  As soon as I detached gdb
the exceptions stop but it dumps core a minute later (or less). The
exception is pasted below also.

Python was compiled with pthreads, which is the freebsd kse threads as
far as I know.  Freebsd version is 5.3-release-p2.



Server code:
-----------------------------------------------------------
from twisted.internet.protocol import Protocol, Factory
from twisted.internet import defer, reactor
from twisted.python import threadable
from twisted.internet import threads
threadable.init(1)
from otransact.otdirect import process
from twisted.python import log

class GetData:

 # this calls my blocking method.  THe method blocks when doing
database calls with psycopg and when using urllib2 to do an https
POST.  Other than that everything is non blocking.  psycopg is
supposed to be thread safe, and I would assume urllib2 is also.

 def Do(self,data):
      response = process(data)
      return response

### Protocol Implementation

# This is just about the simplest possible protocol
class Echo(Protocol):
   def dataReceived(self, data):
     """As soon as any data is received, write it back."""
     reactor.callLater(0, self.Start,data)

   def PrintData(self,data):
     self.transport.write("%s\r\n" % data)
     self.transport.loseConnection()
     #reactor.stop()

   def Start(self,data):
     c = GetData()
     d = threads.deferToThread(c.Do,data)
     d.addCallback(self.PrintData)
     d.addErrback(log.err)

def main():
   f = Factory()
   f.protocol = Echo
   reactor.listenTCP(8000, f)
   reactor.run()

if __name__ == '__main__':
   main()

Exception raised by server when gdb was running.
-----------------------------------------------------------------------

File "otssl.py", line 42, in ?
           reactor.run()
         File "/usr/local/lib/python2.4/site-packages/twisted/internet/default.py",
line 126, in run
           self.mainLoop()
         File "/usr/local/lib/python2.4/site-packages/twisted/internet/default.py",
line 134, in mainLoop
           self.runUntilCurrent()
       --- <exception caught here> ---
         File "/usr/local/lib/python2.4/site-packages/twisted/internet/base.py",
line 423, in runUntilCurrent
           call.func(*call.args, **call.kw)
         File "/usr/home/otransact/ssl/ots.py", line 72, in Start
           d = threads.deferToThread(c.Do,data)
         File "/usr/local/lib/python2.4/site-packages/twisted/internet/threads.py",
line 48, in deferToThread
           reactor.callInThread(_putResultInDeferred, d, f, args, kwargs)
         File "/usr/local/lib/python2.4/site-packages/twisted/internet/base.py",
line 453, in callInThread
           self.threadpool.callInThread(_callable, *args, **kwargs)
         File "/usr/local/lib/python2.4/site-packages/twisted/python/threadpool.py",
line 130, in callInThread
           self.q.put(o)
         File "/usr/local/lib/python2.4/Queue.py", line 91, in put
           self.not_full.release()
       thread.error: release unlocked lock

Backtrace:
------------------------------------------------
#0  0x28286dbb in pthread_testcancel () from /usr/lib/libpthread.so.1
#1  0x2827eb06 in pthread_mutexattr_init () from /usr/lib/libpthread.so.1
#2  0x00000000 in ?? ()


From henryho at NO__SPAMM_.telus.net  Sun Feb 27 04:35:26 2005
From: henryho at NO__SPAMM_.telus.net (fanbanlo)
Date: Sun, 27 Feb 2005 09:35:26 GMT
Subject: best XSLT processor?
Message-ID: <yvgUd.9678$_G.5042@clgrps12>

Which XSLT processor is the most reliable?

requirement:
+ must support Python 2.4
+ must run w/ Windows (and Linux)
+ not super slow

My python project needs a XSLT processor + Docbook's XSLT to translate 
from docbook-xml -> HTML.

PyXML? is it reliable? Slow?
4Suite? some said it is buggy (lots of work arounds)?
Others ???

Thx!


From EP at zomething.com  Mon Feb 14 11:06:03 2005
From: EP at zomething.com (EP)
Date: Mon, 14 Feb 2005 08:06:03 -0800
Subject: mxCGIPython binaries for Python 2.3.5
In-Reply-To: <20050211183904.GA28714@phd.pp.ru>
References: <20050211154457.GA23787@phd.pp.ru>
	<20050211181320.GA23241@caltech.edu> <20050211183904.GA28714@phd.pp.ru>
Message-ID: <20050214080603.1181621450.EP@zomething.com>



> ------------Original Message------------
> From: Oleg Broytmann <phd at oper.phd.pp.ru>

> 
>    http://www.egenix.com/files/python/mxCGIPython.html
> 
> > doesn't involve downloading & unpacking a file.
> 
>    It is unpackable, ready-to-run python binary.
> 
> PS. I am neither author nor maintainer, I only provide binaries for
> some platforms...


I'm unschooled in non-Windows binaries.  Does this mean it may be possible to download this package onto a (for example) SunOS system, unpack and have Python up and running?  That would be sweet...

[frustrated trying to compile Python on a system I do not own...]







From simon.brunning at gmail.com  Mon Feb 14 07:24:39 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Mon, 14 Feb 2005 12:24:39 +0000
Subject: Alternative to raw_input ?
In-Reply-To: <w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>
References: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>
	<mailman.2400.1108139722.22381.python-list@python.org>
	<w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>
Message-ID: <8c7f10c6050214042429843ab5@mail.gmail.com>

On Fri, 11 Feb 2005 17:37:19 +0100, BOOGIEMAN <BOOGIEMANPN at yahoo.com> wrote:
> It looks to ugly this way. I want to press
> any key without ENTER to continue

You'll only got your users complaining that they haven't got an 'any' key...

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From jeff at ccvcorp.com  Fri Feb 11 15:27:59 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Fri, 11 Feb 2005 12:27:59 -0800
Subject: goto, cls, wait  commands
In-Reply-To: <cuhpa6$oou$1@news.tiscali.fr>
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
	<cuhpa6$oou$1@news.tiscali.fr>
Message-ID: <110q581greo8g9e@corp.supernews.com>

jean-michel wrote:

> Hi all,
> I saw a lot of comments saying GOTO is not usefull, very bad, and we
> should'nt use it because we don't need it.
> I think that's true, but only if you *create* programs.
> But if the goal is to provide some kind of converter to automatically take
> an old application written with an old language (using GOTO), and generating
> python code, it would certainly a great help to have this (unclean) feature
> in native python.

But an automatic translator is certain to be imperfect.  One can no 
more translate mechanically between computer languages than one can 
translate mechanically between human languages -- and we've all seen 
the fun that can be had by machine-translating from language A -> 
language B -> language A, right?  What do you think the effect of that 
sort of meaning-drift would be on application code?

In other words, any translation from one language to another will 
require significant human attention, by someone familiar with both 
languages, to ensure that the original meaning is preserved as close 
as possible.  You're going to have to rewrite chunks of code by hand 
no matter what you do; it'd be silly to *not* take that opportunity to 
purge things like GOTO.

Jeff Shannon
Technician/Programmer
Credit International



From albaalu at gmail.com  Tue Feb 15 00:19:54 2005
From: albaalu at gmail.com (PD)
Date: 14 Feb 2005 21:19:54 -0800
Subject: wxPython OGL future
In-Reply-To: <aP-dnUwXT5aB7ozfRVn-ug@powergate.ca>
References: <1108428501.441786.154130@g14g2000cwa.googlegroups.com>
	<aP-dnUwXT5aB7ozfRVn-ug@powergate.ca>
Message-ID: <1108444794.127721.326970@f14g2000cwb.googlegroups.com>

Hi Peter,

I did look at the code, and did run several examples on it. It _is_
pretty well organized and easy to read through, and youre right, I
think i might be able to add missing functionality if need be.

I don't think I want that much out of it necessarily. I just feel
really weird writing new software with deprecated libraries. By the
time Im done with my project, I have to put all these disclaimers on
how the new versions of wxWidgets might not work. The thing I am really
concerened about is if wxPython decides to drop OGL because it is
deprecated... anyhow thats my 2 cents.

I actually saw several other discussions on OGL and think its such a
shame its been abandoned. It seems like a lot of people are interested
in having this kind of functionality present in the library. Who
knows... maybe if i decide to use it and get good at it, I should do my
share and contribute something back to the open-source community :)

Thank you,
Pouya



From nytimes at swiftdsl.com.au  Thu Feb 17 22:05:04 2005
From: nytimes at swiftdsl.com.au (news.sydney.pipenetworks.com)
Date: Fri, 18 Feb 2005 14:05:04 +1100
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <Xns96009AC157257duncanrcpcouk@127.0.0.1>
References: <mailman.2744.1108629122.22381.python-list@python.org>
	<4214A543.2000006@swiftdsl.com.au>
	<Xns96009AC157257duncanrcpcouk@127.0.0.1>
Message-ID: <42155B60.3020808@swiftdsl.com.au>

Duncan Booth wrote:
> news.sydney.pipenetworks.com wrote:
> 
> 
>>I'm not sure if this has been raised in the thread but I sure as heck 
>>always convert my join arguments using str(). When does someone use 
>>.join() and not want all arguments to be strings ? Any examples ?
> 
> 
> This has already been raised, but maybe not in exactly this context. You 
> don't want to convert your arguments to be strings if some of them are 
> unicode.
> 
> If I do:
> 
>   res = str.join(', ', [a, b, c])
> 
> then res is of type str if, and only if, a, b, and c are of type str.
> If any of a, b, or c are of type unicode, then res is unicode.
> 
> In effect, this means you don't have to worry about whether you are 
> manipulating str or unicode at this point in your program (kind of 
> comparable to not caring whether the integer you are using is int or long).
> 
> When you come to output the string you do need to care, as when it is 
> unicode you may have to encode it, but at least the internal manipulations 
> can ignore this possibility.
> 
> Of course you could just call unicode on everything but for simple 
> applications you might not want to handle unicode at all. That's not a 
> decision Python can make for you so it shouldn't guess.

I see your point but I'm not totally convinced  I don't understand 
unicode that well so I'll just be quiet now.

Your point about int and long vs str and unicode is interesting though. 
Does it mean str and unicode will some time in the future be unified 
once all the differences are sorted out ?

Regards,

Huy


From zsolt-googleP6463 at mailblocks.com  Thu Feb 17 17:20:05 2005
From: zsolt-googleP6463 at mailblocks.com (pythonUser_07)
Date: 17 Feb 2005 14:20:05 -0800
Subject: [Fwd: Re: [Uuu-devel] languages] <-- Why Python
References: <mailman.2781.1108677768.22381.python-list@python.org>
Message-ID: <1108678805.542584.171930@z14g2000cwz.googlegroups.com>


Some quick thoughts.

1- Python is not new relatively speaking.

2)- Python is a natural language for learning basic scripting, but can
carry you through to object oriented program.

3)- Knowing python, instantly gets you access to jython.  I've found
jython incredibly helpful in learning java.  Finally, jython seems to
be the defacto test scripting language for java.

Cheers.



From dontwant at spam.com  Sun Feb  6 11:36:08 2005
From: dontwant at spam.com (Courageous)
Date: Sun, 06 Feb 2005 08:36:08 -0800
Subject: Python versus Perl ?
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
Message-ID: <hkhc01dnpmmhn980quijqil40653qipdki@4ax.com>



> If Python is better than Perl, I'm curious how really significant
>those advantages are ?

The main advantage is Python's cleanliness. In Perl, there are so
many different ways of writing a thing, that to be adept in perl,
you have to know them all, otherwise you won't be able to read another
person's code.

Python and Perl accomplish similar things, but have strikingly different
design philosophies. Perl's design philosophy is the kitchen sink: throw
it all in. Python's is, "let's keep this simple." We add things carefully,
and with great deliberation, or not at all.

As a consequence, Python is far easier to learn than Perl.

This has non-trivial consequences on your enterprise operations.

For example, getting new engineers up to speed on the old code base is
a great deal easier.

C//



From bvdeenen at xs-four-all.nl.invalid  Fri Feb 11 09:41:09 2005
From: bvdeenen at xs-four-all.nl.invalid (Bart van Deenen)
Date: Fri, 11 Feb 2005 15:41:09 +0100
Subject: Python in Makefile Question. try A.A.P
References: <MK-dnXqPBfzkHZHfRVn-qw@adelphia.com>
Message-ID: <1grtsqj.m4j0rr1xql874N%bvdeenen@xs-four-all.nl.invalid>

Another option would be to move from Makefiles to AAP, the build
mechanism for vim. We did just that, and are very happy with it. Aap is
python based, so the kind of question you have is very easily handled
within the 'aap' file.

http://www.a-a-p.org/

Aap has the advantage that you don't need to define the dependencies
yourself, it understands C files, and does the work for you. Our
Makefile shrunk by a factor of 5 after converting to aap.

Highly recommended.

Bart van Deenen.



From roy at panix.com  Tue Feb  8 18:37:17 2005
From: roy at panix.com (Roy Smith)
Date: 8 Feb 2005 18:37:17 -0500
Subject: Loop in list.
References: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
	<36s2b2F53f67pU1@individual.net>
	<1107890995.922231.193960@g14g2000cwa.googlegroups.com>
Message-ID: <cubifd$4a5$1@panix2.panix.com>

Jim <jtp11 at att.net> wrote:
> Thanks for the help.  Python is somewhat mysterious to an old fortan
> programer.

You might appreciate http://www.python.org/doc/Humor.html#habits


From rkern at ucsd.edu  Tue Feb  8 19:00:08 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Tue, 08 Feb 2005 16:00:08 -0800
Subject: Big development in the GUI realm
In-Reply-To: <4208b224$1_1@newspeer2.tds.net>
References: <mailman.2123.1107820051.22381.python-list@python.org><4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com><cu95nd$7cr$1@news1.ucsd.edu><6h7g0113up1v76k7qkad7bt17os1q73510@4ax.com><4208237b$0$21623$a1866201@visi.com>	<cu98n4$833$1@news1.ucsd.edu><4208373e$0$21620$a1866201@visi.com>	<cu9eg0$9jb$1@news1.ucsd.edu><mailman.2149.1107853311.22381.python-list@python.org>	<cua0eq$ecj$1@news1.ucsd.edu>
	<mailman.2154.1107858003.22381.python-list@python.org>
	<4208b224$1_1@newspeer2.tds.net>
Message-ID: <cubjq3$s3c$1@news1.ucsd.edu>

Kent Johnson wrote:
> Fredrik Lundh wrote:
> 
>> Robert Kern wrote:
>>
>>
>>> Fair enough. The only time I've seen it in dead-tree print was in 
>>> Heinlein's _Time Enough For Love_, unattributed to anyone else.
> 
> 
> Amazon.com "search inside the book" finds no hits for "malice" in this 
> book.
> http://www.amazon.com/gp/reader/0441810764/102-7636110-6481700?v=search-inside&keywords=malice 

Hooray for technology!

In that case, I have no idea why I thought it was from Heinlein. The 
similar quote[1] that *is* from Heinlein, but an entirely different 
formulation, is from "Logic of Empire", which I know I have not read.

[1] http://en.wikipedia.org/wiki/Hanlon's_Razor

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From scottmallory at gmail.com  Sat Feb 12 17:03:20 2005
From: scottmallory at gmail.com (scottmallory at gmail.com)
Date: 12 Feb 2005 14:03:20 -0800
Subject: exec function
Message-ID: <1108245800.126709.8900@g14g2000cwa.googlegroups.com>

I'm a newbie to pthyon and I am creating an app with wxPython.
I have 7 tables (more on the way... they are feed from a database) that
need to be formatted in a certain way (DataTable() does this) and I am
just looking for a cleaner way to pass all of the Grids (grid_1,
grid_2, etc) through the same function.
I am currently doing this (ugly, but it works):

for i in tables.keys():
    if datadict.has_key(i):
         t = tables.get(i)
         d = datadict.get(i)
         r = rowdata.get(i)
         exec('self.frame.%s.SetTable(DataTable(d, r[0]), True)' % t)


It works (slowly) and I have read that exec is very slow and bad
form...Can any one give me any pointers to clean this mess up?

frame = a wx.Frame (another file which is imported).

Thanks,
Scott



From nav+posts at bandersnatch.org  Mon Feb 14 15:12:41 2005
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: Mon, 14 Feb 2005 15:12:41 -0500
Subject: Considering python - have a few questions.
References: <eZAPd.21496$Ka6.148459@news1.mts.net>
	<C2UPd.2033$x77.1735@fe02.lga>
Message-ID: <877jlaaojq.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>

Grumman <grumman at example.com> writes:

> If running on a Mac really is a goal, ditch Access, its windows
> only. You'd want to look into MySQL, PostgreSQl or some such for
> inter-platform use.

Depending on how large the dataset is likely to get, SQLite may be
a good choice for the data-handling backend. Data files are portable
between machine architectures and within major version numbers, and it
avoids a lot of the setup and maintanence of the database systems
mentioned above (no need for a running server process, etc).

http://sqlite.org/

Just a happy user,

Nick

-- 
#  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this to a python
print reduce(lambda x,y:x+chr(ord(y)-1),' Ojdl!Wbshjti!=obwAcboefstobudi/psh?')


From michele.simionato at gmail.com  Thu Feb  3 03:48:31 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 3 Feb 2005 00:48:31 -0800
Subject: new style exception handleing
In-Reply-To: <f849d2-8h.ln1@pluto.i.infosense.no>
References: <a677d2-h8g.ln1@pluto.i.infosense.no>
	<2LydnVuDKZ32iZzfRVn-qg@powergate.ca>
	<f849d2-8h.ln1@pluto.i.infosense.no>
Message-ID: <1107420511.442976.102120@l41g2000cwc.googlegroups.com>

Google is your friend.
This has been discussed a lot in the past. For instance, google for the
thread,
"Exceptions as New Style Classes", there was also a PEP by Steven
Taschuk,
IIRC.

      Michele Simionato



From michele.simionato at gmail.com  Wed Feb 16 11:07:27 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 16 Feb 2005 08:07:27 -0800
Subject: low-end persistence strategies?
In-Reply-To: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
Message-ID: <1108570047.677348.146850@f14g2000cwb.googlegroups.com>

What about bsddb? On most Unix systems it should be
already installed and on Windows it comes with the
ActiveState distribution of Python, so it should fullfill
your requirements.



From Peter.Vandersteegen at gmail.com  Wed Feb 16 09:54:05 2005
From: Peter.Vandersteegen at gmail.com (peter)
Date: 16 Feb 2005 06:54:05 -0800
Subject: renaming 'references' to functions can give recursive problems
Message-ID: <1108565645.179340.70600@o13g2000cwo.googlegroups.com>

Hello all,

Recently I've started to refactor my code ...(I'm using python 2.3.4)
I tried to add extra functionality to old functions non-intrusively.
When I used a construct, which involves renaming functions etc... I
came across some recursive problems.  (a basic construct can be found
under the section BASIC CODE)

These problems do not occur when renaming objects.  (see section EXTRA
CODE)
My question now is:
I do not know the underlying idea of functions.  Is this the way they
should behave? Or should they work the same way as objects do?
(My preferences goes to this last option)

BASIC CODE:
---------------------------------------------------------------------------
def fA(input): # starting point: function named fA
    return input

def newFA(input): # new function with added functionality
    #does something extra with a!
    return fA(input)
fA = newFA
     # this should allow to add functionality without
     # breaking older code which uses the name fA!
fA() # execute fA()
----------------------------------------------------------------------------
problem: you get...
File "recursivemethods.py", line 7, in newFA
    return fA(input)
RuntimeError: maximum recursion depth exceeded

when using objects this problems does not occur...
EXTRA CODE:
----------------------------------------------------------------------------
PYTHON-CODE                   # REMARKS
referenceA = SomeObject()     #  referenceA -> SomeObject()
                              #       references to the memory space of
                              #              some object
referenceB = referenceA       #  referenceB -> SomeObject()
                              #       is also a reference to ...
referenceA = referenceB       #  referenceA references to SomeObject()

# now for functions!
fA = function                 #  fA references to memory space
                              #  of a function

def newFA(input):             #  newFA references to a function
   return fA(input)           #  which holds a reference to fA.
                  #  Notice the important difference with objects!
                  #  newFA holds a reference to the reference fA
                  #  When using object you reference to
                  #  the memory space of fA!!!
fA = newFA
fA()              # recursive problems!!!
--------------------------------------------------------------------------



From theller at python.net  Fri Feb 11 04:49:01 2005
From: theller at python.net (Thomas Heller)
Date: Fri, 11 Feb 2005 10:49:01 +0100
Subject: PyINI : Cross-Platform INI parser
References: <cuhiak$2gl8$1@mail.cn99.com>
	<3f_Od.26957$QG6.468964@twister2.libero.it>
Message-ID: <vf8ze8aa.fsf@python.net>

"Giovanni Bajo" <noway at sorry.com> writes:

> SeSe wrote:
>
>> hi, every one,
>>
>> I started a opensource project PyINI for corss-platform *.ini parsing
>> at http://sourceforge.net/projects/pyini/
>>
>> I have released a simple alpha version, which can read *.ini, with
>> some extended features such as "key=value1,value2,value3". I also
>> made a c++ binding to PyINI with elmer toolkit.
>
>
> The most useful feature would be to be able to write INI files back without
> affecting their formatting, without removing user commands, etc. This is what
> Windows APIs do, and it is what I am missing from most INI parsing libraries
> out there.

You can easily access the windows apis either with pywin32, or with
ctypes for those functions that aren't wrapped in pywin32.

Thomas


From hanche at math.ntnu.no  Sat Feb 26 13:40:21 2005
From: hanche at math.ntnu.no (Harald Hanche-Olsen)
Date: 26 Feb 2005 19:40:21 +0100
Subject: Whither datetime.date ?
References: <pcomztr9pad.fsf@shuttle.math.ntnu.no>
	<mailman.3093.1109441120.22381.python-list@python.org>
Message-ID: <pcoekf39nca.fsf@shuttle.math.ntnu.no>

+ Tim Peters <tim.peters at gmail.com>:

| As you've deduced, you're certainly not getting Python's builtin
| datetime module.

Argh.  Yeah, I've had one lying around in my personal python directory
since 2000, had totally forgotten it was there.  This one ...

*** Author: Jeff Kunce <kuncej at mail.conservation.state.mo.us>
*** Download from: http://starship.skyport.net/crew/jjkunce

Removed it, now all is well.

Thanks for pointing out the blindingly obvious.

-- 
* Harald Hanche-Olsen     <URL:http://www.math.ntnu.no/~hanche/>
- Debating gives most of us much more psychological satisfaction
  than thinking does: but it deprives us of whatever chance there is
  of getting closer to the truth.  -- C.P. Snow


From francis.girard at free.fr  Mon Feb  7 13:07:10 2005
From: francis.girard at free.fr (Francis Girard)
Date: Mon, 7 Feb 2005 19:07:10 +0100
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <cu7532$er8$01$1@news.t-online.com>
References: <dvOMd.33656$EG1.19314@lakeread04>
	<mailman.2034.1107725421.22381.python-list@python.org>
	<cu7532$er8$01$1@news.t-online.com>
Message-ID: <200502071907.12169.francis.girard@free.fr>

Zut !

I'm very sorry that there is no good use case for the "reduce" function in 
Python, like Peter Otten pretends. That's an otherwise very useful tool for 
many use cases. At least on paper. 

Python documentation should say "There is no good use case for the reduce 
function in Python and we don't know why we bother you offering it."

Francis Girard

Le lundi 7 F?vrier 2005 08:24, Peter Otten a ?crit?:
> Francis Girard wrote:
> > This is a prefect use case for the good old "reduce" function:
> >
> > --BEGIN SNAP
> >
> > a_lst = [None,0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5]
> >
> > def straightforward_collapse(lst):
> > return?reduce(lambda?v,e:?v[-1]!=e?and?v+[e]?or?v,?lst[1:],?[lst[0]])
>
> reduce() magically increases the number of function calls by len(a_list).
> There will be no good use cases for reduce() until Python can inline
> functions.
>
> Apodictically Yours
> Peter



From Scott.Daniels at Acm.Org  Mon Feb  7 19:33:20 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Mon, 07 Feb 2005 16:33:20 -0800
Subject: negative integer division
In-Reply-To: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
References: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
Message-ID: <42080522$1@nntp0.pdx.net>

Imbaud Pierre wrote:
> integer division and modulo gives different results in c and python, 
> when negative numbers
> are involved. take gdb as a widely available c interpreter
>  print -2 /3
> 0 for c, -1 for python.
> more amazing, modulos of negative number give negative values! (in c).
> from an algebraic point of view, python seems right, but I thought 
> python conformity to the underlying c compiler was a strong commitment, 
> obviously not here, and I found no explanation whatsoever in python doc.
> no actual programming challenge for me here, I just had this bug, after 
> confidently translating from python to c.
> 
If you read the C standard, you can see that the C compiler is free to
make -1 / 3 either -1 or 0 (but it must describe what it does).  The
decision is usually to do whatever the underlying CPU does.  The
rationale is that often you will be dividing positive by positive,
and you don't want the compiler sprinkling around a lot of test code.

While the difference in compiled C is a substantial time penalty
(DIVIDE vs. DIVIDE; COMPARE; JUMPGE), in Python the trade-off is
adding two instructions to many (50? 100?).  Python doesn't really
mind paying for a few extra instructions to get the canonical value,
and the guarantee simplifies the user's code.

--Scott David Daniels
Scott.Daniels at Acm.Org


From mrjean1ATcomcastDOTnet at no.spam.net  Tue Feb 22 03:45:17 2005
From: mrjean1ATcomcastDOTnet at no.spam.net (Jean Brouwers)
Date: Tue, 22 Feb 2005 00:45:17 -0800
Subject: which parser to use
References: <87ll9hmdd6.fsf@subopt.house-net>
Message-ID: <220220050045176272%mrjean1ATcomcastDOTnet@no.spam.net>


Check out SimpleParse/mxTextTools.  Just an outstanding E/BNF driven
parser, very highly recommended.

 <http://simpleparse.sourceforge.net/>

/Jean Brouwers

PS) See also

<http://www-128.ibm.com/developerworks/linux/library/l-simple.html>

<http://gnosis.cx/publish/programming/charming_python_b4.html>

There are descriptions of other Python-based parsers on this site
<http://gnosis.cx/TPiP/>



In article <87ll9hmdd6.fsf at subopt.house-net>, <a_nuther at geek.org> wrote:

> I'm building something that requires parsing a rather complex
> language. I'd like to do the whole application, including the
> lex/parse phase, in Python (for development/debug speed), and only
> move parts of it to a compiled language if execution speed absolutely
> dictates. So, what i'm looking for in a Python parser is:
> 
>     1) reliability (don't want to debug a parser)
>     1) flexibility (i do a lot of refactoring)
>     2) E/BNF friendliness (working from a spec)
>     3) speed (moderate speed will do; glacial won't)
> 
> Does anyone have any familiarity with some of the several Python
> parsers out there? Any pointers to comparisons (as opposed to surveys)
> of _several_ of the Python parsers would be much appereciated. (I've
> seen the YAPPS/Spark comparison.) If none of the Python parsers really
> fit the bill, any thoughts on ANTLR, Spirit, etc?
> 
> Thanks in advance,
> E
>


From steven.bethard at gmail.com  Thu Feb  3 17:36:18 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 03 Feb 2005 15:36:18 -0700
Subject: List mapping question
In-Reply-To: <YrCdnTL0BbmkOJ_fRVn-iw@gwi.net>
References: <g-mdnXrKqZd2Ap_fRVn-rw@midcoast.com>
	<vvxMd.102714$Jk5.11242@lakeread01>
	<YrCdnTL0BbmkOJ_fRVn-iw@gwi.net>
Message-ID: <6rydnVSSHP39Op_fRVn-ig@comcast.com>

Marc Huffnagle wrote:
> Steve Holden wrote:
> 
>>  >>> a,b,c = 1.1, 2.2, 3.3
>>  >>> a,b,c = map(int, (a,b,c))
>>  >>> a,b,c
>> (1, 2, 3)
>>  >>> a,b,c = [int(x) for x in (a,b,c)]
>>  >>> a,b,c
>> (1, 2, 3)
>>
>> regards
>>  Steve
> 
> Thanks ... so there's no way to pass an actual variable into a list 
> mapping, instead of its value?  I guess I'm thinking of something the 
> equivalent of call by reference.

No, not really.  You could do something like:

py> a, b, c = 1.1, 2.2, 3.3
py> mod = __import__(__name__)
py> for name in ('a', 'b', 'c'):
...     setattr(mod, name, int(getattr(mod, name)))
...
py> a, b, c
(1, 2, 3)

where you use the namespace in which the name resides (the module), but 
I'd probably advise against it...  I would suggest doing something like:

py> myvars = dict(a=1.1, b=2.2, c=3.3)
py> for key, value in myvars.iteritems():
...     myvars[key] = int(value)
...
py> myvars
{'a': 1, 'c': 3, 'b': 2}

If you want to pass around variables, it's generally better to put them 
in a dict, list, class instance or some other sort of container then 
mess around with them at the module level...

(another) STeVe


From simonwittber at gmail.com  Mon Feb 21 22:36:51 2005
From: simonwittber at gmail.com (Simon Wittber)
Date: Tue, 22 Feb 2005 11:36:51 +0800
Subject: pyrex just in time compilation
Message-ID: <4e4a11f8050221193659c59e54@mail.gmail.com>

It occured to me that an import hook could be written for  pyrex
'.pyx' files, so that compilation can occur at runtime, if the source
file has changed since the last compile.

Before I try this myself, has anyone else already written any code to do this?

Sw.


From steven.bethard at gmail.com  Mon Feb 14 15:06:48 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 14 Feb 2005 13:06:48 -0700
Subject: Can't subclass datetime.datetime?
In-Reply-To: <421100b4$0$41671$a1866201@visi.com>
References: <421100b4$0$41671$a1866201@visi.com>
Message-ID: <4s-dnbRfytZMmYzfRVn-iA@comcast.com>

Grant Edwards wrote:
> Is it true that a datetime object can convert itself into a
> string, but not the other way around?  IOW, there's no simple
> way to take the output from str(d) and turn it back into d?

I assume this is true because there is not one standard format for a 
date-time string.  But I don't use the module enough, so I'll let 
someone else answer this part of the question.

> import datetime
> 
> class MyDatetime(datetime.datetime):
>     def __init__(self,s):
>             s1,s2 = s.split(' ')
>             v = s1.split('-') + s2.split(':')
>             v = map(int,v)
>             datetime.datetime.__init__(self,v[0],v[1],v[2],v[3],v[4],v[5])
> 
> s = '2005-02-14 12:34:56'
> d = MyDatetime(s)
> 
> Running the above yields:
> 
>   Traceback (most recent call last):
>     File "dt.py", line 11, in ?
>       d = MyDatetime(s)
>   TypeError: function takes at least 3 arguments (1 given)

datetime.datetime objects are immutable, so you need to define __new__ 
instead of __init__:

py> class DateTime(datetime.datetime):
...     def __new__(cls, s):
...         s1, s2 = s.split(' ')
...         v = map(int, s1.split('-') + s2.split(':'))
...         return datetime.datetime.__new__(cls, *v)
...
py> DateTime('2005-02-14 12:34:56')
DateTime(2005, 2, 14, 12, 34, 56)

Steve


From steven at lczmsoft.com  Sat Feb 19 22:40:42 2005
From: steven at lczmsoft.com (steven at lczmsoft.com)
Date: 19 Feb 2005 19:40:42 -0800
Subject: How Do I get Know What Attributes/Functions In A Class?
Message-ID: <1108870842.095282.54200@z14g2000cwz.googlegroups.com>

Hi,

I'm new to python.  Given a class, how can I get know what
attributes/functins in it without dig into the source?

-
narke



From exogen at gmail.com  Wed Feb 16 12:44:48 2005
From: exogen at gmail.com (Brian Beck)
Date: Wed, 16 Feb 2005 12:44:48 -0500
Subject: Getting milliseconds in Python
In-Reply-To: <1108571009.698970.152020@z14g2000cwz.googlegroups.com>
References: <1108565135.167562.196830@z14g2000cwz.googlegroups.com>
	<37h5epF5ck38lU2@individual.net>
	<1108571009.698970.152020@z14g2000cwz.googlegroups.com>
Message-ID: <cv0100$715$1@eeyore.INS.cwru.edu>

mjs7231 wrote:
> This is no good, I am looking for milliseconds, not seconds.. as stated
> above.

That IS what you want.

seconds * 100 = milliseconds

--
Brian Beck
Adventurer of the First Order


From macrocosm at fastmail.fm  Thu Feb 17 20:14:55 2005
From: macrocosm at fastmail.fm (Arich Chanachai)
Date: Thu, 17 Feb 2005 20:14:55 -0500
Subject: [Fwd: Re: [Uuu-devel] languages] <-- Why Python
In-Reply-To: <864qgaisoq.fsf@guru.mired.org>
References: <mailman.2781.1108677768.22381.python-list@python.org>	<1108678805.542584.171930@z14g2000cwz.googlegroups.com>	<mailman.2783.1108679758.22381.python-list@python.org>
	<864qgaisoq.fsf@guru.mired.org>
Message-ID: <4215418F.7010605@fastmail.fm>

Mike Meyer wrote:

>Arich Chanachai <macrocosm at fastmail.fm> writes:
>
>  
>
>>These last two points kind of diverge from the point, no?  What I mean
>>is that we want to present the argument of why Python is the best
>>choice as THE built-in programming language for the revolutionary uuu
>>operating system.
>>    
>>
>
>A new operating system shouldn't be picking "THE" built-in programming
>language. It should instead be providing mechanisms to allow arbitrary
>programming languages to be used wherever they are required. Tying the
>users of the OS - or of some application - down to a specific language
>is a disservice to the developers and users of that OS or application.
>
>While Python is an excellent language, and has a nice implementation
>for embedding/extending applications, it's not necessarily the best
>choice for all problems. You're be doing much better for your users to
>allow them to choose the right language for the problem than to
>dictate the language that has to be used.
>
>        <mike
>  
>
There is no intention to dictate, but instead to provide out-of-the-box, 
built-into-the-architecture support for a single language or a wide 
array of languages.  For now, this will begin with a single language and 
the question is merely which one.  Python has been chosen, but some 
would argue that others are a better choice, such as Lisp.  In the 
future, or whenever someone steps up to the plate, support for the CLR 
will be implemented, thus broadening the array of integrally supported 
programming languages (i.e IronPython, Boo, and so forth).


From claird at lairds.us  Wed Feb 23 20:08:06 2005
From: claird at lairds.us (Cameron Laird)
Date: Thu, 24 Feb 2005 01:08:06 GMT
Subject: Attaching to a Python Interpreter a la Tcl
References: <1109155068.468295.121630@f14g2000cwb.googlegroups.com>
	<421C6042.8060608@jessikat.fsnet.co.uk>
Message-ID: <2hlve2-b6p.ln1@lairds.us>

In article <421C6042.8060608 at jessikat.fsnet.co.uk>,
Robin Becker  <robin at SPAMREMOVEjessikat.fsnet.co.uk> wrote:
>DE wrote:
>> Hello,
>> 
>> Some long time ago, I used to use Tcl/Tk. I had an tcl embedded into my
>> app.
>> 
>> The coolest thing was however, I was able to attach to the interpreter
>> (built in to my app) via a tcl shell in which I could type in regular
>> tcl code which would be interpreted by the interpreter of my
>> application. Naturally, it was possible to call tcl functions of my
>> applications.
>> 
>> Some kind of rapid RPC.
>> 
>> Is this also possible with python ?
>> 
>> Thanks,
>> 
>I think you are talking about the tk send command which allows for 
>communicating with a known app.
>
>I don't believe python comes with such a facility without some coding, 
>but it has been implemented in various ways using sockets etc etc.
>
>I seem to remember that modern idle uses an rpc technique for debugging.
>
>There are several python projects which address interprocess 
>communication pyro http://pyro.sourceforge.net/ is a good example.
			.
			.
			.
Agreed:  Python makes it easy to do this.  Tk *does* this,
out-of-the-box.

But note!  Tkinter can access Tk's [send], so, if the appli-
cation happened to be built with Tkinter, and one were fluent
enough at translating between Tcl and Python to reach the
latter by way of the former, then, yes, you would find that
your Python application already has this.


From bpeng at rice.edu  Fri Feb  4 19:28:34 2005
From: bpeng at rice.edu (Bo Peng)
Date: Fri, 04 Feb 2005 18:28:34 -0600
Subject: changing local namespace of a function
In-Reply-To: <1107550212.114358.281200@z14g2000cwz.googlegroups.com>
References: <cu0lru$8ik$1@joe.rice.edu>
	<1107550212.114358.281200@z14g2000cwz.googlegroups.com>
Message-ID: <cu13vi$ji7$1@joe.rice.edu>

M.E.Farmer wrote:

>>>>def fun(d):
> 
> ...     __dict__ = d
> ...     return __dict__
> hth,


Does not work?

 >>> a = { 'x':1, 'y':2}
 >>> b = { 'x':2, 'y':9}
 >>> def fun(d):
...   __dict__ = d
...   print locals()
...   z = x + y
 >>> fun(a)
{'__dict__': {'y': 2, 'x': 1}, 'd': {'y': 2, 'x': 1}}
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "/usr/tmp/python-6377tax.py", line 4, in fun
NameError: global name 'x' is not defined


From peter at engcorp.com  Sat Feb 26 21:11:28 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 26 Feb 2005 21:11:28 -0500
Subject: Thread scheduling
In-Reply-To: <mailman.3103.1109465231.22381.python-list@python.org>
References: <1109456481.214243.140670@l41g2000cwc.googlegroups.com>	<mailman.3100.1109457191.22381.python-list@python.org>	<09Kdndga9dgQkrzfRVn-hg@powergate.ca>
	<mailman.3103.1109465231.22381.python-list@python.org>
Message-ID: <G_WdnU5rv57SsbzfRVn-vg@powergate.ca>

Jack Orenstein wrote:
> Peter Hansen wrote:
>  > You've got two shared global variables, "done" and "counter".
>  > Each of these is modified in a manner that is not thread-safe.
>  > I don't know if "counter" is causing trouble, but it seems
>  > likely that "done" is.
> 
> I understand that. 

>  > Basically, the statement "done += 1" is equivalent to the
>  > statement "done = done + 1" which, in Python or most other
>  > languages is not thread-safe.  
> 
> Understood. I was counting on this being unlikely for my test
> case. I realize this isn't something to rely on in real software.

Hmm... okay.  I may have been distracted by the fact that your
termination condition is based on "done" incrementing properly,
and that it was possible this wouldn't happen because of the race
condition.  So, if I understand you now, you're saying that the
reason "done" doesn't increment is actually because one of the
threads is never finishing properly, for some reason not related
to the code itself. (?)

> The point of the
> test is not to maintain counter -- it's to show that sometimes even
> after one thread completes, the other thread never is scheduled
> again. This seems wrong. Try running the code, and let me see if you
> see this behavior.

On my machines (one Py2.4 on WinXP, one Py2.3.4 on RH9.0) I don't
see this behaviour.  Across about fifty runs each.

> And the two increments of done (one by each thread) are still
> almost certainly not going to coincide and cause a problem. Also, if
> you look at the output from the code on a hang, you will see that
> 'thread X: leaving' only prints once. This has nothing to do with what
> happens with the done variable.

Okay, I believe you.  As I said, I hadn't taken the time to read
through everything at first, jumping on an "obvious" bug related
to the "done" variable not meeting your termination conditions.
I can see that something else is likely to be causing this.

One thing you might try is experimenting with sys.setcheckinterval(),
just to see what effect it might have, if any.

It's also possible there were some threading bugs in Py2.2 under
Linux.  Maybe you could repeat the test with a more recent
version and see if you get different behaviour.  (Not that that
proves anything conclusively, but at least it might be a good
solution for your immediate problem.)

-Peter


From VaMailArmor at usl9.toscana.it  Wed Feb 23 11:26:53 2005
From: VaMailArmor at usl9.toscana.it (VaMailArmor at usl9.toscana.it)
Date: Wed, 23 Feb 2005 17:26:53 +0100
Subject: Vexira ALERT [your mail: "Hi"]
Message-ID: <200502231626.j1NGQrs07108@dns.usl9.toscana.it>

* * * * * * * * * * * * * * * Vexira ALERT * * * * * * * * * * * * * * *
This version of Vexira MailArmor is licensed and full featured.

Vexira has detected the following in a mail from your address:

	Worm/NetSky.Z worm	

The mail was not delivered.

Your computer may be infected with a virus! Please visit
Central Command at http://www.centralcommand.com and obtain a copy
of Vexira AntiVirus now.

Mail-Info:
--8<--
 From: python-list at python.org
 To: gi.ricci at usl9.toscana.it
 Date: Wed, 23 Feb 2005 17:32:58 +0100
 Subject: Hi
--8<--


-- 
Vexira AntiVirus for Linux, OpenBSD, FreeBSD
Virus Protection for the Real World (TM).
Central Command http://www.centralcommand.com


From sean at buildingonline.com  Tue Feb 15 16:24:37 2005
From: sean at buildingonline.com (Sean)
Date: Tue, 15 Feb 2005 13:24:37 -0800
Subject: Calling a function from module question.
References: <UTsQd.32669$6u.27954@fed1read02>
	<42125d6d$0$28977$e4fe514c@news.xs4all.nl>
Message-ID: <3LtQd.32674$6u.18210@fed1read02>

> Sean wrote:
>
>> Then I would have a script that uses the
>> print_this function defined in the module
>> without using the module name in the call.
>
>
>
> from module_name import print_this
>
> or, even:
>
> from module_name import print_this as other_nice_name
>

So what if I have a whole bunch of functions - say 25 of them.
Is there a way to do this without naming each function?




From belred at gmail.com  Mon Feb 21 13:55:05 2005
From: belred at gmail.com (Bryan)
Date: Mon, 21 Feb 2005 10:55:05 -0800
Subject: python2.4 generator expression > python2.3 list expression
In-Reply-To: <Xns9604B1AD25B91duncanrcpcouk@127.0.0.1>
References: <0ioj11dsgqhatqc3d7ldeb35rta6d9fk69@4ax.com>	<mailman.2896.1109004722.22381.python-list@python.org>
	<Xns9604B1AD25B91duncanrcpcouk@127.0.0.1>
Message-ID: <cvdajj$sf0$1@sea.gmane.org>

Duncan Booth wrote:
> Bryan wrote:
> 
> 
>>>is to reset the rightmost (less significant) '1' bit of a number (ie
>>>change it to '0').
>>
>>i tried c &= c - 1 but i'm not getting the least significant or
>>rightmost bit reset to zero.  am i misunderstanding something?
>>
>>
>>>>>2 & 1  # 2 = 0x10; reset right most would be 0x10
>>
>>0
>>
>>>>>10 & 9 # 10 = 0x1010; reset right most would be 0x1010
>>
>>8
> 
> 
> The difference between the original "reset the rightmost '1' bit", and your 
> interpretation: "reset the rightmost bit" is the "'1'".
> 
> The rightmost bit that is set is reset. So 0x10 -> 0, and 0x1010 -> 0x1000.
> 
> If you want to extract the least significant set bit from a number 'x' you 
> can use (x&-x):
> 
> 
>>>>x = 0xab4
>>>>while x:
> 
> 	print hex(x&-x), hex(x)
> 	x ^= (x&-x)
> 
> 	
> 0x4 0xab4
> 0x10 0xab0
> 0x20 0xaa0
> 0x80 0xa80
> 0x200 0xa00
> 0x800 0x800
> 
> 
> (but don't try this if x is negative: it works but never terminates).

thanks duncan... you're right, i did intrepret this as "reset the rightmost bit" 
instead of "reset the rightmost '1' bit".  and i must have read what christos 
wrote 100 times!!!

bryan



From ods at strana.ru  Thu Feb 10 05:00:42 2005
From: ods at strana.ru (Denis S. Otkidach)
Date: Thu, 10 Feb 2005 13:00:42 +0300
Subject: sre is broken in SuSE 9.2
Message-ID: <20050210130042.0f3e49fb.ods@strana.ru>

On all platfroms \w matches all unicode letters when used with flag
re.UNICODE, but this doesn't work on SuSE 9.2:

Python 2.3.4 (#1, Dec 17 2004, 19:56:48) 
[GCC 3.3.4 (pre 3.3.5 20040809)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import re
>>> re.compile(ur'\w+', re.U).match(u'\xe4')
>>> 

BTW, is correctly recognize this character as lowercase letter:
>>> import unicodedata
>>> unicodedata.category(u'\xe4')
'Ll'

I've looked through all SuSE patches applied, but found nothing related.
What is the reason for broken behavior?  Incorrect configure options?

-- 
Denis S. Otkidach
http://www.python.ru/      [ru]


From zoerhoff at ukato.freeshell.org  Wed Feb 23 21:25:35 2005
From: zoerhoff at ukato.freeshell.org (Kristian M Zoerhoff)
Date: Thu, 24 Feb 2005 02:25:35 +0000 (UTC)
Subject: rounding problem
References: <gu6dnWNLB-FHuoDfRVn-tA@comcast.com>
Message-ID: <slrnd1qemf.5n6.zoerhoff@ukato.freeshell.org>

In article <gu6dnWNLB-FHuoDfRVn-tA at comcast.com>, Andy Leszczynski wrote:
> >>> a=1.1
> >>> a
> 1.1000000000000001
> >>>
> 
> 
> Is it normal?

Yes, for floating-point numbers. This is due to inherent imprecision
in how floats are represented in hardware. If you can live with being
a touch off that many decimal places out, you can just clean up upon
printing with something like:

>>>print "%0.1f" % (a)
1.1

for your value of a above. If you don't want to deal with this cruft,
you may want to give the Decimal class a gander:

>>>from Decimal import *
>>>setcontext(ExtendedContext)
>>>a = Decimal('1.1')
>>>a
'Decimal("1.1")'
>>> print a
1.1


-- 
zoerhoff(AT)sdf.lonestar.org 
kristian.zoerhoff(AT)gmail.com


From ilias at lazaridis.com  Tue Feb 15 10:24:28 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 17:24:28 +0200
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <Xns95FE5F96DEF96duncanrcpcouk@127.0.0.1>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108370491.792820.142200@z14g2000cwz.googlegroups.com>
	<cuprg2$6rt$1@usenet.otenet.gr> <37bcdkF5bg7knU1@individual.net>
	<cupumi$kfs$1@usenet.otenet.gr> <37bel6F59jvkgU1@individual.net>
	<cuq4d6$fqp$1@usenet.otenet.gr>
	<Xns95FD7EAD8A162duncanrcpcouk@127.0.0.1>
	<curb0t$67k$2@usenet.otenet.gr>
	<Xns95FE5F96DEF96duncanrcpcouk@127.0.0.1>
Message-ID: <cut47a$h29$1@usenet.otenet.gr>

Duncan Booth wrote:
> Ilias Lazaridis wrote:
> 
> 
>>>"In accordance with section 10 of the GPL, Red Hat, Inc. permits
>>>programs whose sources are distributed under a license that complies
>>>with the Open Source definition to be linked with libcygwin.a without
>>>libcygwin.a itself causing the resulting program to be covered by the
>>>GNU GPL." 
>>
>>If I understand this right, I cannot produce commercial software with 
>>the cygwin toolset.
> 
> Contrariwise. You can produce commercial software, and it doesn't have to 
> be GPL licensed. However if you want to distribute it (and much, possibly  
> most, commercial software is never distributed) you have to choose between 
> making it open-source, or buying a commercial license for cygwin. You do 
> realise that you can produce open-source software commercially?

I understand that I've possibly not expressed myself clear.

"proprietary software" should be the right term, right?

> If you want to make your program closed source then to distribute it you 
> have to pay for the cygwin license, which all seems pretty fair to me. You 
> have a problem with that?

yes.

.

-- 
http://lazaridis.com


From ajikoe at gmail.com  Fri Feb  4 09:51:21 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 4 Feb 2005 06:51:21 -0800
Subject: regular expression match collection
In-Reply-To: <420387E6.5000208@draigBrady.com>
References: <1107525832.015932.286300@f14g2000cwb.googlegroups.com>
	<420387E6.5000208@draigBrady.com>
Message-ID: <1107528681.661769.46230@l41g2000cwc.googlegroups.com>

Thanks you...



From bearophileHUGS at lycos.com  Sat Feb 19 13:24:13 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 19 Feb 2005 10:24:13 -0800
Subject: exercise: partition a list by equivalence
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<mailman.2803.1108743668.22381.python-list@python.org>
	<1108768870.455974.244590@c13g2000cwb.googlegroups.com>
	<eppstein-8851A4.18394418022005@news.service.uci.edu>
Message-ID: <1108837453.883740.309270@f14g2000cwb.googlegroups.com>

David Eppstein:
> However it might be easier to treat the input pairs as the edges of a
> graph and apply a depth-first-search based graph connected components
> algorithm. || This would be O(n), though.

Is the DFS the best one here (instead of BFS)?

With the graph implementation that I've just shown here it becomes:

. import graph
. def merge(l):
.     g = graph.Graph()
.     g.addArcs(l)
.     return g.connectedComponents()
. print merge( [ [1,2], [2,4], [5,6] ] )

I presume the complexity is O(n+a); n (the nodes) is proportional to
the number of pairs, and
a (the arcs) depends on the "intricacy" of the input pairs. For a
complete graph, this can
become slow (but there is a high probably that all the pairs are in the
same connected component).
Bye,
Bearophile



From kdahlhaus at yahoo.com  Fri Feb 18 09:23:40 2005
From: kdahlhaus at yahoo.com (kdahlhaus at yahoo.com)
Date: 18 Feb 2005 06:23:40 -0800
Subject: Py2exe and extension issues
In-Reply-To: <1104780623.038891.25810@z14g2000cwz.googlegroups.com>
References: <1104763249.008031.100100@f14g2000cwb.googlegroups.com>
	<1104780623.038891.25810@z14g2000cwz.googlegroups.com>
Message-ID: <1108736620.006298.305220@f14g2000cwb.googlegroups.com>

John,

Thanks, for some reason, I just saw your response.  I'll be getting
back to that app in about 2 week and the first item is to look into the
issue.



From mahs at telcopartners.com  Sat Feb 12 19:01:26 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sat, 12 Feb 2005 16:01:26 -0800
Subject: check if object is number
In-Reply-To: <tKidnT6fyKm_DpPfRVn-pA@comcast.com>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>	<374t0mF4te5vbU1@individual.net>	<7tOdnYs6NtrV7JDfRVn-vQ@powergate.ca>	<mLKdnbj4O4gQH5DfRVn-iA@comcast.com>	<mailman.2456.1108249466.22381.python-list@python.org>
	<tKidnT6fyKm_DpPfRVn-pA@comcast.com>
Message-ID: <cum57c$k48$1@sea.gmane.org>

Steven Bethard wrote:
> Michael Spencer wrote:
> 
>> Steven Bethard wrote:
>>
>>> Peter Hansen wrote:
>>>
>>>> Of course, most of the other definitions of "is a number" that
>>>> have been posted may likewise fail (defined as not doing what the
>>>> OP would have wanted, in this case) with a numarray arange.
>>
>>
>> How about explicitly calling an adapter in your function, e.g.?
> 
> 
> Yup, that's basically what I'm doing right now.  The question was really 
> how to define that adapter function. =)
> 
> Steve
OK - then my entry is:
	assert obj+1 >= 1
:-)

Michael



From ted.lilley at gmail.com  Sat Feb 19 23:00:41 2005
From: ted.lilley at gmail.com (Ted Lilley)
Date: 19 Feb 2005 20:00:41 -0800
Subject: lambda closure question
In-Reply-To: <mailman.2831.1108814832.22381.python-list@python.org>
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
	<1108808502.699333.66520@g14g2000cwa.googlegroups.com>
	<mailman.2831.1108814832.22381.python-list@python.org>
Message-ID: <1108872041.034467.239950@l41g2000cwc.googlegroups.com>

Wow, a lot of great discussion.  Almost a bit too much for me to
grasp...I do see two or more nuggets that really address my issue.

As a side note, I'm familiar with the term currying from a friend who
learned ML and Scheme quite some time ago.  Not sure if that's the true
origin, but it was a sufficiently different context from Python (or at
least I thought) that I didn't want to rely on its meaning.  I was also
sufficiently unsure of it's _exact_ meaning, since we're talking about
two slightly different models, that I didn't want to use the term for
that reason as well.  It's gratifying to know that it was a relevant
concept afterall, the partial function application discussion
notwithstanding.  It's also gratifying to see such a strong community
versed in functional programming styles.  Although I've only started
working with FP in Python, it's been a useful tool for making my
programming simpler.

The first useful nugget is the crystalization method.  I spent some
time thinking about the problem after I posted it and came up with the
same workaround, in fact, the exact same syntax.  It's a bit inelegant,
but it gets the job done for what I want to do.  I won't even attempt
to take a position in the debate about whether Python should work by
default the way it does or the way I want to use it. ;)  Seems we have
well-spoken advocates for both sides.

The other nifty nugget is Kent's suggestion for using old-style Python
default arguments to capture the variable value.  Since it looks
slightly more elegant I'm going to give it a shot.

I have to say, I was happily surprised by the volume and quality of
response to my little issue.  Thanks everyone!

Ted



From peter at somewhere.com  Wed Feb 23 08:19:38 2005
From: peter at somewhere.com (Peter Maas)
Date: Wed, 23 Feb 2005 14:19:38 +0100
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2562.1108412196.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr><1108405626.130007.320710@l41g2000cwc.googlegroups.com><mailman.2561.1108409059.22381.python-list@python.org>	<1108411017.507814.229600@c13g2000cwb.googlegroups.com>
	<mailman.2562.1108412196.22381.python-list@python.org>
Message-ID: <cvhml0$rcf$1@swifty.westend.com>

Fredrik Lundh schrieb:
>     +00: googled for the mingw home page
>     +00: found the mingw download page
>     +02: finally figured out what to download
>     +03: noticed that my usual SF site only offered 1K/s; aborted download
>     +07: finished downloading the mingw kit from another SF site
>     +17: finished installing
>     +18: added \mingw\bin to the path
>     +18: typed "python setup.py install --compiler=mingw32"
>     +18: got a linker error; googled for help
>     +19: copied python24.dll to \mingw\lib
>     +20: finished building the sample library (cElementTree); all tests pass

Impressive. How did you record the minutes? ;) I'd like to know wether
this is a single observation or true for most if not all your MinGW
builds?

I used Borland's C++ Compiler (free and commercial) and had frequently
to tweak .def files and the source to make it work. I also had to
transform the python dll with COFF2OMF because the library interfaces
of python.dll and the Borland binaries were different.

If your MinGW experience described above is typical then I'll get a
stop watch and give it a try ;)

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From ilias at lazaridis.com  Mon Feb 14 04:37:06 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Mon, 14 Feb 2005 11:37:06 +0200
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <1108370491.792820.142200@z14g2000cwz.googlegroups.com>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108370491.792820.142200@z14g2000cwz.googlegroups.com>
Message-ID: <cuprg2$6rt$1@usenet.otenet.gr>

[please check your news-client. For some reason, the tag "[EVALUATION]" 
was removed]

-

You answer essentially something like "It's not necessary" cause "with a 
little hacking it works".

I've found lots of documents, which describe how to "hack around" to 
make it work.

I don't want to do "hacking".

I want to develope large scale applications, and for this I need an 
stable official version of the python language, either binary or 
produced directly out of official sources, completely with an 
open-source tool-chain.

That's the reason for my very specific questions, which you have mostly 
ignored.

-

copied from another answer:

"The Python Foundation could create an official sub-project to create an 
automated build target based on the MinGW toolchain. I am sure that many 
community members would be more than happy to contribute."

.

-- 
http://lazaridis.com


From ncoghlan at iinet.net.au  Thu Feb  3 06:51:13 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Thu, 03 Feb 2005 21:51:13 +1000
Subject: test_socket.py failure
In-Reply-To: <ctsh0702qca@news2.newsguy.com>
References: <ctinqv0c1a@news4.newsguy.com>	<mailman.1630.1107173295.22381.python-list@python.org>	<ctmpr3025eh@news2.newsguy.com>	<mailman.1723.1107313414.22381.python-list@python.org>	<ctqpak01igc@news4.newsguy.com>	<n5f7d2-aub.ln1@halut.solar-empire.de>
	<ctsh0702qca@news2.newsguy.com>
Message-ID: <42021031.4040408@iinet.net.au>

x2164 at mailcity.com wrote:
>      Marc, it is possible that there was a change between 
>      glibc-2.2.4 and 2.2.5 that would account for the 
>      difference in behaviour.  I think i'll write a little
>      test program in C to check out getservbyname's return
>      values in a little more controled environment.  I'll
>      post the results tomorrow.

The other question is which C library Python is actually using on your system. 
Maybe it's picking up whatever installed the funky man page which doesn't 
mention NULL proto arguments.

So, find your Python 2.4 binary and run "ldd python24" to see which shared C 
library it is linking to.

For me, it's /lib/tls/libc.so.6. Running that library directly prints out the 
message about GNU C library 2.3.3.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From ny_r_marquez at yahoo.com  Mon Feb  7 11:52:25 2005
From: ny_r_marquez at yahoo.com (RM)
Date: 7 Feb 2005 08:52:25 -0800
Subject: Big development in the GUI realm
Message-ID: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>

For all you GUI developers, things just got a little more interesting.
Trolltech will soon be offering the QT GUI toolkit for Windows under
the GPL license.  That means that PyQt may become a much more popular
option in the near future.  Unfortunately, some things available for
the commercial customers of Trolltech are not available to the GPL
users.  For example, from their FAQ, it seems that no precompiled
binaries will be provided.  Support for comercial compilers will not be
built in, only for gcc (through Cygwin?).  Also, their database drivers
will not be available.  Oh, well, I guess you can't have it all.  Good
news though!

See more here:

www.trolltech.com

I wonder how this is going to affect the GUI landscape.



From Peter.Vandersteegen at gmail.com  Wed Feb 16 09:37:00 2005
From: Peter.Vandersteegen at gmail.com (peter)
Date: 16 Feb 2005 06:37:00 -0800
Subject: adding new functionality to a function non-intrusively!
Message-ID: <1108564620.657526.301320@g14g2000cwa.googlegroups.com>

Hello all,

Recently I've started to refactor my code ...
I would like to add extra functionality to a function !non-intrusively!
(not rewriting the old code is really important)
How can I achieve this?

Thus I start with an old function named fA.
I would like to add extra functionality to fA.
Essentially this gives a new function fA which can call the old
function fA

thanks a lot for reading so far

Peter

ps.
following idea does not work!
# fA = old fA, already defined
def tempFunc(*args):
   # do something with fA
   return
fA = tempFunc # gives infinite loop, recursive mails
# this example is explained in more detail in other mail called:
"renaming 'references' to functions gives recursive problems'



From roy at panix.com  Mon Feb 21 12:59:05 2005
From: roy at panix.com (Roy Smith)
Date: Mon, 21 Feb 2005 12:59:05 -0500
Subject: Unittest - testing properties (read-only attributes)
References: <uu0o5c0br.fsf@yahoo.co.uk>
	<roy-7E7A58.12112821022005@reader2.panix.com>
	<uaKdncr3ppCbhIffRVn-rA@powergate.ca>
	<7xu0o5akr2.fsf@ruckus.brouhaha.com>
	<Xns9604B247481Cduncanrcpcouk@127.0.0.1>
	<7x4qg5n72h.fsf@ruckus.brouhaha.com>
Message-ID: <roy-C58B80.12590521022005@reader2.panix.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote:
>  The example I quoted used an assignment expression inside a
> lambda.  The person who posted it,

That was me.

> and the person who followed it up
> with the setattr alternative, both didn't notice that the assignment
> expression wasn't valid Python.

Ugh.  No, I hadn't noticed it.  Thanks for pointing it out.

I don't use lambdas much.  In fact, the only time I ever do use them is for 
an assertRaises unit test.  I've always thought that "assignment is  a 
statement not an expression" was one of Python's warts, and this is just 
another example of why it is.  Of course, "lambda isn't just a def body" is 
a wart too :-)

> However, my post came out sounding
> grumpier than I intended ;).

Actually, I hadn't noticed that either. :-)


From jgamble at ripco.com  Sat Feb 26 13:55:33 2005
From: jgamble at ripco.com (John M. Gamble)
Date: Sat, 26 Feb 2005 18:55:33 +0000 (UTC)
Subject: any Python equivalent of Math::Polynomial::Solve?
References: <just-420C1F.16423926022005@news1.news.xs4all.nl>
Message-ID: <cvqgn5$n0b$1@e250.ripco.com>

In article <just-420C1F.16423926022005 at news1.news.xs4all.nl>,
Just  <just at xs4all.nl> wrote:
>While googling for a non-linear equation solver, I found 
>Math::Polynomial::Solve in CPAN. It seems a great little module, except 

Thank you.

>it's not Python... 

Sorry about that.

>                   I'm especially looking for its poly_root() 
>functionality (which solves arbitrary polynomials). Does anyone know of 
>a Python module/package that implements that?

Are you looking for that particular algorithm, or for any
source that will find the roots of the polynomial?  The
original source for the algorithm used in the module is
from Hiroshi Murakami's Fortran source, and it shouldn't
be too difficult to repeat the translation process to python.

-- 
	-john

February 28 1997: Last day libraries could order catalogue cards
from the Library of Congress.


From ug at algonet.se  Thu Feb 10 13:39:20 2005
From: ug at algonet.se (=?ISO-8859-1?Q?Ulf_G=F6ransson?=)
Date: Thu, 10 Feb 2005 19:39:20 +0100
Subject: goto, cls, wait  commands
In-Reply-To: <420b9f4b$0$29241$626a14ce@news.free.fr>
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
	<Xns95F9A4E32D0CBduncanrcpcouk@127.0.0.1>
	<420b9f4b$0$29241$626a14ce@news.free.fr>
Message-ID: <cug9s3$l21$1@yggdrasil.glocalnet.net>

Bruno Desthuilliers wrote:
> Duncan Booth a ?crit :
>> BOOGIEMAN wrote:
>>> Secondly, how do I clear screen (cls) from text and other
>>> content ?
>>
>> That depends on your computer, and how you are running your program.
>> One way which *might* work is:
>>
>>    import os
>>    os.system("cls")
> 
> *might* work... !-)
>  bruno at bibi modulix $ cls
> -bash: cls: command not found
> 
> Bad luck ! didn't work !-)

Works for me! But then again...

kairos:ug> cat cls
#! /usr/local/bin/python
print "\xc",

/ug 8-)


From duncan.booth at invalid.invalid  Thu Feb 10 08:46:18 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 10 Feb 2005 13:46:18 GMT
Subject: passing arguments like -JOB
References: <4412dd31.0502100513.7d7418b@posting.google.com>
Message-ID: <Xns95F98B4F52031duncanrcpcouk@127.0.0.1>

John Leslie wrote:

> I am porting a script from Korn Shell to python and want to pass named
> parameters like -JOB 123456 -DIR mydir
> 
> I can get it to work passing --JOB and --DIR but not -JOB and -DIR
> 
> Any ideas?
> 
Unfortunately (for you), I think you will find most or all of the existing 
ways to parse command line options in Python follow the POSIX convention 
for arguments, i.e. single letter options are introduced with a single - 
and multi-letter options are introduced with --.

My guess is that if you can't change whatever generates the command lines 
to conform to this convention you will have to write your own code to do 
the processing.

Alternatively you might get by by hacking the command line in your Python 
code:

   for i, opt in enumerate(sys.argv):
       if opt in ('-JOB','-DIR', '-ERR', '-GRP', '-TST', '-JNM', '-DAT'):
          sys.argv[i] = '-'+opt

   ... and then use getopt or optparse here ...

It isn't pretty, but so long as those values don't turn up elsewhere in the 
command line it ought to work.


From duncan.booth at invalid.invalid  Sat Feb 26 06:09:22 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 26 Feb 2005 11:09:22 GMT
Subject: split a directory string into a list
References: <Xns96089DC274CF8duncanrcpcouk@127.0.0.1>
	<mailman.3063.1109355891.22381.python-list@python.org>
Message-ID: <Xns9609717C8B6A3duncanrcpcouk@127.0.0.1>

Josef Meile wrote:

> "This should work ***reasonably*** reliably on Windows and Unix". Are
> there any cases when it does not work?

The most obvious case where it wouldn't work would be for a UNC path name. 
Using the string split method gives two empty strings:

>>> os.path.normpath(r'\\machine\share').split(os.path.sep)
['', '', 'machine', 'share']
>>> 


whereas the splitpath function I proposed gives you:

>>> splitpath(r'\\machine\share')
['\\\\', 'machine', 'share']

So to find out the type of path (relative, absolute, unc), you only have to 
consider the first element with my function but you have to look at the 
first two elements if you just naively split the string.

Also a relative windows path with a drive letter doesn't get fully split:

>>> os.path.normpath(r'c:dir\file').split(os.path.sep)
['c:dir', 'file']
>>> splitpath(r'c:dir\file')
['c:', 'dir', 'file']

If you really are worried about speed (and are sure you aren't optimising 
prematurely), then you could combine some special case processing near the 
start of the string with a simple split of the remainder.


From smitty_one_each at bigfoot.com  Fri Feb 25 07:33:30 2005
From: smitty_one_each at bigfoot.com (Chris Smith)
Date: Fri, 25 Feb 2005 07:33:30 -0500
Subject: wanted: C++ parser written in Python
References: <mukr11t39khpd8od53im9jic3s6qjcl3j2@4ax.com>
	<3881hvF5jg6qrU1@individual.net>
	<91ut11pi7s6acj2pthj2crnh6n96o6raqs@4ax.com>
	<du7k6ow7wle.fsf@amadeus.cc.tut.fi>
	<ev1u111chcfetcf9dudfr41n26l5q7t3se@4ax.com>
Message-ID: <uy8dcbyzp.fsf@bigfoot.com>

>>>>> "Franz" == Franz Steinhaeusler <franz.steinhaeusler at utanet.at> writes:

    Franz> On 25 Feb 2005 12:38:53 +0200, Ville Vainio <ville at spammers.com> wrote:
    Franz> Hello Ville,

    >>>>>>> "Franz" == Franz Steinhaeusler
    >>>>>>> <franz.steinhaeusler at utanet.at> writes:
    >> 
    Franz> Thank you, but it is too big.
    >> 
    Franz> Anyway:
    >> 
    Franz> I'm looking for some (simple) "rules" to parse (regex) and
    Franz> try to implement myself, if nothing is available.
    >> 
    >> Check out
    >> 
    >> http://pyparsing.sourceforge.net/

    Franz> Thank you for this information!

    Franz> Also a little to complicated, I'm looking for a quick
    Franz> solution.

    >> 
    >> Before you start implementing one yourself. Regexp solution
    >> would probably be a bit flakier. And do share your results when
    >> you get some; I'm in need of a c++ parser myself.

    Franz> I don't want to scan a whole project, only the currently
    Franz> open file.

    Franz> class definition method/function ignore comment lines show
    Franz> #includes would be enough at first.


    Franz> I will inform again :)

    Franz> -- Franz Steinhaeusler
In the "instant gratification" department, there is Emacs with the
Emacs Code Browser interface.  ECB contains a C++ parser done in
Lisp.  If you need to extract things, there is a PyMacs interface that
works quite well.
See http://www.emacswiki.org for details.
Given the "power, performance, ease of use; pick any two" clich?,
we're clearly ditching the middle one with this approach. :)
Best,
Chris


From moa at extrapolation.com  Thu Feb  3 00:03:46 2005
From: moa at extrapolation.com (moa at extrapolation.com)
Date: 2 Feb 2005 21:03:46 -0800
Subject: Reinstall python 2.3 on OSX 10.3.5?
In-Reply-To: <cts4cd$nik$1@news1.ucsd.edu>
References: <1107388080.703032.116150@g14g2000cwa.googlegroups.com>
	<cts4cd$nik$1@news1.ucsd.edu>
Message-ID: <1107407026.734503.265740@g14g2000cwa.googlegroups.com>

keerist. I suspected as much. so much for my happy Mac feeling to date.



From kevryan0701 at yahoo.com  Sun Feb 13 18:39:59 2005
From: kevryan0701 at yahoo.com (Kevin T. Ryan)
Date: Sun, 13 Feb 2005 23:39:59 +0000
Subject: FCGI Help?
Message-ID: <vOydnXUCWtkAto3fRVn-2w@comcast.com>

Hi All - 

I'm trying to develop web applications using python / Cheetah.  I'm also
trying to experiment with lighttpd (see www.lighttpd.net), which supports
fast-cgi.  So, I downloaded Robin Dunn's fcgi.py file
(http://alldunn.com/python/fcgi.py), and everything is up and running
nicely.  Except, I'm a complete dummy - totally new to fast-cgi
development.  Therefore, when I run lighttpd and direct it to use fcgi as
my fast-cgi app, it starts the _test() function w/in fcgi.py which simply
prints some nice information about my request / environment.

I then tried to develop my own app/server that inherits from fcgi, and then
maps uri requests to my classes (for example, www.mysite.com/users/new_week
maps to class user(), method new_week()).  I *somewhat* got this working
(at least, it doesn't shut down on me immediately, but doesn't do much else
either)...but every request has to have a file associated with it (which
obviously isn't the case since I'm trying to map into a class/method, not a
file).  So it doesn't work :(

Anyway, I'm completely frustrated on how to use fast-cgi.  I've also checked
out fast-cgi.com, but they only seem to give trivial examples on how to use
fast-cgi (unless I didn't search / read enough, but I've been looking for a
few days on and off).

My questions are:

1.  Can anyone point me to a good resource on how to create fast-cgi apps
(real world examples??) or how to use fcgi.py properly?

2.  I've thought about creating a fast-cgi app that simply spawns python
interpreters and then runs the scripts from the request uri - is this
possible / easy to do?

I know I could use Apache's mod_python or something similar, but I'm clearly
a glutton for punishment :)  I'm also hoping to use something a little less
daunting than Apache if possible.

Thanks for your help, and sorry for such a long post!

Kevin T. Ryan


From mad.mick at gmx.de  Fri Feb  4 13:28:11 2005
From: mad.mick at gmx.de (Mick Krippendorf)
Date: Fri, 4 Feb 2005 19:28:11 +0100
Subject: returning True, False or None
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
Message-ID: <36hsnsF517qrgU1@individual.net>

Steven Bethard wrote:
> I have lists containing values that are all either True, False or
> None, e.g.:
> 
>      [True,  None,  None,  False]
>      [None,  False, False, None ]
>      [False, True,  True,  True ]
>      etc.
> 
> For a given list:
> * If all values are None, the function should return None.
> * If at least one value is True, the function should return True.
> * Otherwise, the function should return False.

Try:

 >>> max(lst)

Mick.


From steven.bethard at gmail.com  Sun Feb 13 16:54:35 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 13 Feb 2005 14:54:35 -0700
Subject: help please
In-Reply-To: <1108329540.239064.144920@f14g2000cwb.googlegroups.com>
References: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
	<TPKdnU2eEu9xPJPfRVn-vg@comcast.com>
	<1108260752.791847.180060@l41g2000cwc.googlegroups.com>
	<Z4ydnbKMDLVvEJLfRVn-hA@comcast.com>
	<1108324679.451793.147890@z14g2000cwz.googlegroups.com>
	<i_ydnb41nJ68IZLfRVn-gw@comcast.com>
	<1108329540.239064.144920@f14g2000cwb.googlegroups.com>
Message-ID: <j7udnc1ZGqsAUZLfRVn-3w@comcast.com>

gargonx wrote:
> Well that seems to work like a champion, but my prob then would be; how
> do i get the double character values of ext to turn back to the single
> character keys. The reversed (decode if you will).

It's unclear what you want to do here.  If you have say:

ext = dict(aa='A', ab='B', bb='C')

then how should 'aaabb' be decoded?  Some possibilities:

'ABb'
'AaC'
'aAC'

Steve


From gustavo at niemeyer.net  Thu Feb 24 14:36:12 2005
From: gustavo at niemeyer.net (Gustavo Niemeyer)
Date: Thu, 24 Feb 2005 16:36:12 -0300
Subject: [ANN] dateutil 0.9
Message-ID: <20050224193612.GA10727@burma.localdomain>


https://moin.conectiva.com.br/DateUtil


Description
-----------

The dateutil module provides powerful extensions to
the standard datetime module, available in Python 2.3+.


Features
--------

- Computing of relative deltas (next month, next year,
  next monday, last week of month, etc);

- Computing of relative deltas between two given
  date and/or datetime objects;

- Computing of dates based on very flexible recurrence rules,
  using a superset of the iCalendar specification. Parsing of RFC
  strings is supported as well.

- Generic parsing of dates in almost any string format;

- Timezone (tzinfo) implementations for tzfile(5) format
  files (/etc/localtime, /usr/share/zoneinfo, etc), TZ
  environment string (in all known formats), iCalendar
  format files, given ranges (with help from relative deltas),
  local machine timezone, fixed offset timezone, UTC timezone,
  and Windows registry-based time zones.

- Internal up-to-date world timezone information based on
  Olson's database.

- Computing of Easter Sunday dates for any given year,
  using Western, Orthodox or Julian algorithms;

- More than 400 test cases.


Version 0.9
-----------

- Implemented internal timezone information with binary
  timezone files [1]. datautil.tz.gettz() function will now
  try to use the system timezone files, and fallback to
  the internal versions. It's also possible to ask for
  the internal versions directly by using
  dateutil.zoneinfo.gettz().

- New tzwin timezone type, allowing access to Windows
  internal timezones (contributed by Jeffrey Harris).

- Fixed parsing of unicode date strings.

- Fixed pickling of timezone types, as reported by
  Andreas K?hler.

- Accept parserinfo instances as the parser constructor
  parameter, besides parserinfo (sub)classes.

- Changed weekday to spell the not-set n value as None
  instead of 0.

- Fixed other reported bugs.

[1] http://www.twinsun.com/tz/tz-link.htm


-- 
Gustavo Niemeyer
http://niemeyer.net


From steven.bethard at gmail.com  Fri Feb  4 12:56:03 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 04 Feb 2005 10:56:03 -0700
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <dvOMd.33656$EG1.19314@lakeread04>
References: <dvOMd.33656$EG1.19314@lakeread04>
Message-ID: <l56dnQ3CxKitKp7fRVn-jA@comcast.com>

Alan McIntyre wrote:
> Hi all,
> 
> I have a list of items that has contiguous repetitions of values, but 
> the number and location of the repetitions is not important, so I just 
> need to strip them out.  For example, if my original list is 
> [0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5], I want to end up with [0,1,2,3,2,4,5].
> 
> Here is the way I'm doing this now:
> 
> def straightforward_collapse(myList):
>     collapsed = [myList[0]]
>     for n in myList[1:]:
>         if n != collapsed[-1]:
>             collapsed.append(n)
> 
>     return collapsed
> 
> Is there an elegant way to do this, or should I just stick with the code 
> above?

Well, this does about the same thing, but using enumerate and a list 
comprehension:

py> lst = [0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5]
py> [item for i, item in enumerate(lst) if i == 0 or item != lst[i-1]]
[0, 1, 2, 3, 2, 4, 5]

Similar code that doesn't check 'if i == 0' each time through:

py> itr = enumerate(lst)
py> itr.next()
(0, 0)
py> [lst[0]] + [item for i, item in itr if item != lst[i-1]]
[0, 1, 2, 3, 2, 4, 5]

I don't know if either of these is really more elegant though...

Steve


From aleaxit at yahoo.com  Sat Feb  5 05:17:10 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 5 Feb 2005 11:17:10 +0100
Subject: returning True, False or None
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
	<1grh3fe.1km48v56sadeyN%aleaxit@yahoo.com>
	<mailman.1903.1107541896.22381.python-list@python.org>
Message-ID: <1gricae.koxsvijxeo8dN%aleaxit@yahoo.com>

Brian van den Broek <bvande at po-box.mcgill.ca> wrote:
   ...
> >>* If all values are None, the function should return None.
> >>* If at least one value is True, the function should return True.
> >>* Otherwise, the function should return False.
   ...
> > for val in (x for x in lst if x is not None):
> >     return val
> > return None
   ...
> These don't do what the OP desired.

Ah, you're right, True should take precedence, point 2 of the specs.


OK, let's take advantage of the fact that None < False < True:

return max(lst)


This fails when lst is empty (the specs presumably imply a None should
be returned then).  More robust:

return max(lst or [None])


Alex


From xah at xahlee.org  Wed Feb 16 17:15:08 2005
From: xah at xahlee.org (Xah Lee)
Date: 16 Feb 2005 14:15:08 -0800
Subject: [perl-python] problem: reducing comparison (erratum)
In-Reply-To: <1108471704.220626.27530@g14g2000cwa.googlegroups.com>
References: <1108450348.253772.158120@z14g2000cwz.googlegroups.com>
	<1108471704.220626.27530@g14g2000cwa.googlegroups.com>
Message-ID: <1108592108.331641.254500@f14g2000cwb.googlegroups.com>

Xah Lee wrote:
> In imperative languages such as Perl and Python
> and Java, in general it is not safe to delete
> elements when looping thru a list-like entity.
> (it screws up the iteration) One must make a
> copy first, and work with the copy.

Correction:
When looping thru a list-like entity and delete elements in the vary
list, there's a question whether it will change the iteration. (For
example, if one loops thru 1 to 9, and deleted 8 while at 2, should the
loop still do 8?) This is a design issue. Both behavior are useful. For
some languages and or list entities, the answer may be yes or no.
However, in imperative languages such as Perl and Python and Java,
often modifying a list while looping simply cannot be done, justified
as a protection to safeguard programers as ignoramuses, but partially
because the internal issues of these languages. (These languages have
molded a generation of programers to question and discourse man-made
complexities.)

The work around in these languages is always to make a copy of the
list-entity, and work with the copy.

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From richardjones at optushome.com.au  Sat Feb 12 17:35:14 2005
From: richardjones at optushome.com.au (richard)
Date: Sun, 13 Feb 2005 09:35:14 +1100
Subject: Testing web applications
References: <cui0pe$r0c$04$1@news.t-online.com>
	<mailman.2377.1108120636.22381.python-list@python.org>
	<871xbl28sm.fsf@pobox.com>
Message-ID: <420e84a2$0$5643$afc38c87@news.optusnet.com.au>

John J. Lee wrote:
>> > I'm looking for frameworks to make testing web applications -
> 
> Did you read the question?

To answer the original question, which I did not see when first posted:

http://www.mechanicalcat.net/tech/webunit/


    Richard



From flory at fdu.edu  Sun Feb 20 22:09:20 2005
From: flory at fdu.edu (David Flory)
Date: Sun, 20 Feb 2005 22:09:20 -0500
Subject: PyEphem on Win32
Message-ID: <!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAA48bIjzpX0xGAzADAT0HvxsKAAAAQAAAAuRQQIvZLo06m9w0oVRrpGgEAAAAA@fdu.edu>

 
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Has anyone run the PyEphem ephemeris application under WinXP?  I have
compiled it with Visual Studio 6 and it crashes Python with a simple

>>> import ephem
>>> ephem.date('1994/7/16')

Identical code works fine under Linux. 

I am running ActivePython 2.3.5 Build 236 on a WinXP SP2 system with
Visual Studio 6 patched to sp6.
- -------------------------------------------
David Flory

-----BEGIN PGP SIGNATURE-----
Version: PGP 8.1

iQA/AwUBQhlQ31e2/rcN3lp8EQJElQCgjRVn5alvDdcCUIuPie5XAnyGJV8AoN5Z
HXZz9RD02fr1cKfh13BcIFNd
=RNWe
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From ncoghlan at iinet.net.au  Sat Feb  5 12:09:58 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 06 Feb 2005 03:09:58 +1000
Subject: changing local namespace of a function
In-Reply-To: <cu2qlm$34d$1@joe.rice.edu>
References: <cu0lru$8ik$1@joe.rice.edu>	<cu0sj5$sfk$1@sea.gmane.org>	<4204400C.5060608@iinet.net.au>	<mailman.1948.1107575575.22381.python-list@python.org>	<cu1l9o$3oq$1@joe.rice.edu>	<mailman.1962.1107593815.22381.python-list@python.org>
	<cu2qlm$34d$1@joe.rice.edu>
Message-ID: <4204FDE6.8050209@iinet.net.au>

Something I forgot to mention. . .

Bo Peng wrote:
> You know, I have a deep root in C/C++ so performance is the king and 
> hacking is part of my daily life. Time to change now. :)

The entire design of C++ is in many ways a regrettable monument to the idea that 
premature optimisation is evil - far too many of the language's default 
behaviours are 'fast in particular cases, but quite simply wrong in most cases, 
and the compiler often can't tell you which case applies'. So you can write 
buggy warning free code just by failing to override the unsafe default behaviours.

That said, one of the reasons I like CPython is that it lets you drop into C/C++ 
really easily when you need to (generally for hardware interface or performance 
reasons). The builtin profiler can also give some decent hints on the 
bottlenecks where you need to focus your performance improvements.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From simon.brunning at gmail.com  Tue Feb  8 11:43:56 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Tue, 8 Feb 2005 16:43:56 +0000
Subject: Effbot's SimpleXMLWriter fails when py2exe'd
In-Reply-To: <1107880337.524216.180440@g14g2000cwa.googlegroups.com>
References: <1107880337.524216.180440@g14g2000cwa.googlegroups.com>
Message-ID: <8c7f10c605020808436d0b4865@mail.gmail.com>

On Tue, 08 Feb 2005 08:35:51 -0800 (PST), Erik  Bethke
<erikbethke at gmail.com> wrote:
> I am getting this strange error log when writing XML files with his XML
> writer.  It appears to be fouling up on the encoding, ONLY in the exe
> version.  Runs fine and great as a python script.

<http://starship.python.net/crew/theller/moin.cgi/EncodingsAgain>

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From benn at cenix-bioscience.com  Fri Feb 11 07:41:48 2005
From: benn at cenix-bioscience.com (Neil Benn)
Date: Fri, 11 Feb 2005 13:41:48 +0100
Subject: Multi-Platform installer generator
In-Reply-To: <420CA1EE.6000905@esss.com.br>
References: <420CA1EE.6000905@esss.com.br>
Message-ID: <420CA80C.3020503@cenix-bioscience.com>

Nicodemus wrote:

> Hello list,
>
> On windows my company uses Inno Setup to generate installers for our 
> products, and on Linux we usually use a simple shell script, but we 
> would like to use the same installer generator for both platforms. 
> Searching google turned up some multi-platform installers (mostly in 
> Java), but I gather that they require a Java VM installed in the 
> target system, and that is undesirable for us, since most system don't 
> come with a Java VM ready (or am I completely wrong in this aspect?).
>
> <snip>

Hello,

          You can install the JavaVM to use to run the installer (if 
there isn't a JVM present on the system - common in windows boxes), 
installing JRE is a minimal effort and can be done silently - you can 
remove it the same way after if you wish but often Java installers are 
used to install Java programs so you don't want to bother doing that.

Cheers,

Neil

-- 

Neil Benn
Senior Automation Engineer
Cenix BioScience
BioInnovations Zentrum
Tatzberg 46
D-01307
Dresden
Germany

Tel : +49 (0)351 4173 154
e-mail : benn at cenix-bioscience.com
Cenix Website : http://www.cenix-bioscience.com



From duncan.booth at invalid.invalid  Thu Feb 17 10:12:47 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 17 Feb 2005 15:12:47 GMT
Subject: Why doesn't join() call str() on its arguments?
References: <mailman.2744.1108629122.22381.python-list@python.org>
	<4214A543.2000006@swiftdsl.com.au>
Message-ID: <Xns96009AC157257duncanrcpcouk@127.0.0.1>

news.sydney.pipenetworks.com wrote:

> I'm not sure if this has been raised in the thread but I sure as heck 
> always convert my join arguments using str(). When does someone use 
> .join() and not want all arguments to be strings ? Any examples ?

This has already been raised, but maybe not in exactly this context. You 
don't want to convert your arguments to be strings if some of them are 
unicode.

If I do:

  res = str.join(', ', [a, b, c])

then res is of type str if, and only if, a, b, and c are of type str.
If any of a, b, or c are of type unicode, then res is unicode.

In effect, this means you don't have to worry about whether you are 
manipulating str or unicode at this point in your program (kind of 
comparable to not caring whether the integer you are using is int or long).

When you come to output the string you do need to care, as when it is 
unicode you may have to encode it, but at least the internal manipulations 
can ignore this possibility.

Of course you could just call unicode on everything but for simple 
applications you might not want to handle unicode at all. That's not a 
decision Python can make for you so it shouldn't guess.


From jason at tishler.net  Wed Feb  2 07:44:35 2005
From: jason at tishler.net (Jason Tishler)
Date: Wed, 2 Feb 2005 07:44:35 -0500
Subject: Building Python with Tcl/Tk on Cygwin_NT-5.1
In-Reply-To: <41FFA7C9.4070308@llnl.gov>
References: <41FF5A67.3090606@llnl.gov> <20050201125129.GA432@tishler.net>
	<41FFA7C9.4070308@llnl.gov>
Message-ID: <20050202124435.GA2472@tishler.net>

Dean,

On Tue, Feb 01, 2005 at 08:01:13AM -0800, Dean N. Williams wrote:
> I am getting the following error message from the Python build:
> 
> Traceback (most recent call last):
>  File "<string>", line 1, in ?
>  File "/usr/local/ASD_work/cdat/lib/python2.4/lib-tk/Tkinter.py", line 
> 38, in ?
>    import _tkinter # If this fails your Python may not be configured for Tk
> ImportError: No module named _tkinter
> Python Tkinter import failed.
> 
> 
> Have you seen this type of error message before?

No.

> I've attached the following log files for each build.

It appears you did not carefully read the build logs yourself:

    building '_tkinter' extension
    gcc -shared -Wl,--enable-auto-image-base build/temp.cygwin-1.5.12-i686-2.4/_tkinter.o build/temp.cygwin-1.5.12-i686-2.4/tkappinit.o -L/usr/X11R6/lib64 -L/usr/X11R6/lib -L/usr/local/ASD_work/cdat/lib -L/usr/local/lib -L. -ltk8.4 -ltcl8.4 -lpython2.4 -o build/lib.cygwin-1.5.12-i686-2.4/_tkinter.dll
    /usr/local/ASD_work/cdat/lib/libtk8.4.a(tkWindow.o)(.text+0x1093):tkWindow.c: undefined reference to `_XDestroyWindow'
    ...
    collect2: ld returned 1 exit status

Hence, you were unsuccessful building _tkinter.  This is why the import
above fails.

> [snip]
> 
> What else am I missing to do?

Using the pre-built Python and Tcl/Tk packages that are part of the
standard Cygwin distribution instead of attempting to build your own.

Jason

-- 
PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6


From tzot at sil-tec.gr  Fri Feb  4 19:13:19 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Sat, 05 Feb 2005 02:13:19 +0200
Subject: Possibly OT:  Controlling winamp with Python
References: <JZOdnVLIY48-S57fRVn-hA@comcast.com>
Message-ID: <8p38015elepl3tljmegadntrvpeb6mislf@4ax.com>

On Fri, 4 Feb 2005 13:10:10 -0700, rumours say that "Brent W. Hughes"
<brent.hughes at comcast.net> might have written:

>I'm running Windows XP and I'm using winamp to listen to internet radio 
>stations.  Occasionally, an annoying commercial will come on.  I would like 
>to write a Python program that, when run, will, in essence, push on winamp's 
>mute button.  Then, after say 20 seconds, it will push the mute button again 
>to restore the sound.  Is such a thing possible?
>

Search the winamp plugin pages for WinAmpCom, which allows you to control winamp
through COM (if you can't find it, let me know by email, I'll send it to you).
Much less hassle than my initial attempts to control it with SendMessage and
PostMessage etc.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From fuzzyman at gmail.com  Thu Feb  3 08:47:50 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 3 Feb 2005 05:47:50 -0800
Subject: CONTEST - What is the (best) solution?
In-Reply-To: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
References: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
Message-ID: <1107438470.804041.195580@z14g2000cwz.googlegroups.com>

By the way - all suggestions so far rely on chopping the last
dictionary out as a string (naturally) and then using 'eval' to
evaluate it.

This has the inherent security problem that embedded python code will
also be run. This is not just a security risk (which may *not* be an
issue) but might cause extremely unpredictable results - which will be
I guess. Text might be evaluated as an expression.

There already exists a small python module called ConstructParser by
John Berninger that will read dictionaries from strings and reconstruct
them without using eval. You'll still need to isolate the actual
dictionary you want.

Google for it, if you can't find it - email me and I'll send you a
copy. It's nice and small.....

If you want a script that will load and save dictionaries you could use
ConfigObj. It uses the text format of 'ini' files ( keyword=value), but
is very easy to use. http://www.voidspace.org.uk/python/configobj.html

Regards,


Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From steve at holdenweb.com  Fri Feb  4 13:04:16 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 04 Feb 2005 13:04:16 -0500
Subject: returning True, False or None
In-Reply-To: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
Message-ID: <PTOMd.103076$Jk5.19984@lakeread01>

Steven Bethard wrote:

> I have lists containing values that are all either True, False or None, 
> e.g.:
> 
>     [True,  None,  None,  False]
>     [None,  False, False, None ]
>     [False, True,  True,  True ]
>     etc.
> 
> For a given list:
> * If all values are None, the function should return None.
> * If at least one value is True, the function should return True.
> * Otherwise, the function should return False.
> 
> Right now, my code looks like:
> 
>     if True in lst:
>         return True
>     elif False in lst:
>         return False
>     else:
>         return None
> 
> This has a light code smell for me though -- can anyone see a simpler 
> way of writing this?
> 
> STeVe

That code looks like a pretty solid implementation of the spec to me. 
There isn't a strict need for the last else, of course, which may be the 
smell you detect.

If you wanted to get clever you could write something like

for i in True, False:
   if i in lst:
     return i
return False

but frankly I think that's more obscure, and saves you pretty much nothing.

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From forestiero at qwest.net  Thu Feb  3 23:31:37 2005
From: forestiero at qwest.net (DogWalker)
Date: Thu, 03 Feb 2005 20:31:37 -0800
Subject: IPython colors in windows
In-Reply-To: <opslnmywarej1m1c@ashot>
References: <opslndb7l9ej1m1c@ashot>
	<1107487113.732375.110850@c13g2000cwb.googlegroups.com>
	<opslnmywarej1m1c@ashot>
Message-ID: <20050204043000.24839.74493@linux.local>

"Ashot" <ashot at removemolsoftthis.com> said:

>On 3 Feb 2005 19:18:33 -0800, James <fphsml at gmail.com> wrote:
>
>>
>> Ashot wrote:
>>> I am using IPython in windows and the LightBG setting doesn't
>> correctly
>>> because the background of the text is black even if the console
>> background
>>> is white.  Anyone know whats going on?  Thanks.
>>>
>>> --
>>> ==============================
>>> Ashot Petrosian
>>> University of Texas at Austin, Computer Sciences
>>> (views expressed are solely my own)
>>> ==============================
>>
>> Did you try installing readline for windows?
>> http://newcenturycomputers.net/projects/readline.html
>>
>
>yea I've installed that and ctypes.  The color and tab completion work,  
>its just that colored get displayed with black background, it almost works  
>so its very frustrating..
>

Did you try the following (from the manual)?:

Input/Output prompts and exception tracebacks 


You can test whether the colored prompts and tracebacks work on your system interactively by typing '%colors Linux' at the prompt (use '%colors LightBG' if your terminal has a light background). If the input prompt shows garbage like: 
[0;32mIn [[1;32m1[0;32m]: [0;00m 
 instead of (in color) something like: 
 In [1]: 
  this means that your terminal doesn't properly handle color escape sequences. You can go to a 'no color' mode by typing '%colors NoColor'. 


  You can try using a different terminal emulator program. To permanently set your color preferences, edit the file $HOME/.ipython/ipythonrc and set the colors option to the desired value. 

From oliver.eichler at dspsolutions.de  Wed Feb  9 08:42:54 2005
From: oliver.eichler at dspsolutions.de (Oliver Eichler)
Date: Wed, 09 Feb 2005 14:42:54 +0100
Subject: convert list of tuples into several lists
Message-ID: <cud40u$vqb$01$1@news.t-online.com>

Hi,

I can find examples to convert lists into a list of tuples like:

>>> map(None,[1,2,3],[4,5,6])
[(1,4),(2,5),(3,6)]

but how is it done vice versa?

Oliver


From fphsml at gmail.com  Thu Feb  3 22:18:33 2005
From: fphsml at gmail.com (James)
Date: 3 Feb 2005 19:18:33 -0800
Subject: IPython colors in windows
In-Reply-To: <opslndb7l9ej1m1c@ashot>
References: <opslndb7l9ej1m1c@ashot>
Message-ID: <1107487113.732375.110850@c13g2000cwb.googlegroups.com>


Ashot wrote:
> I am using IPython in windows and the LightBG setting doesn't
correctly
> because the background of the text is black even if the console
background
> is white.  Anyone know whats going on?  Thanks.
>
> --
> ==============================
> Ashot Petrosian
> University of Texas at Austin, Computer Sciences
> (views expressed are solely my own)
> ==============================

Did you try installing readline for windows?
http://newcenturycomputers.net/projects/readline.html



From deetsNOSPAM at web.de  Fri Feb 11 06:23:28 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 11 Feb 2005 12:23:28 +0100
Subject: PyQt documentation
References: <1108088253.552834.44690@z14g2000cwz.googlegroups.com>
Message-ID: <373it0F4uglf9U1@individual.net>

> The docs of the Riverbank site is poor, and I have found separate
> tutorials on the net.
> 
> I know that the Kompany have made a "Qtdoc"-like to PyQt. But it is not
> free doc.

You can use the qt c++ doc from trolltech. The pyqt bindings are so close to
the original that you usually can simply use that. Additionally, there is a
book from boudewijn rempt about coding in python+qt which is for qt2, but
it covers all the signal slot basics and is completely available online.
> 
> Does anybody know anything about any project for making PyQt
> development more easy?

There is an python-based ide which has the same name as your first name -
try that.

-- 
Regards,

Diez B. Roggisch


From tzot at sil-tec.gr  Thu Feb 24 12:00:26 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 24 Feb 2005 19:00:26 +0200
Subject: what is wrong?
References: <1109262849.733430.13020@f14g2000cwb.googlegroups.com>
Message-ID: <vo1s11hn9bp62t1sogrmr9p165cmlf0pqd@4ax.com>

On 24 Feb 2005 08:34:09 -0800, rumours say that neutrinman at myrealbox.com might
have written:

>I cannot find out why the following code generates the error:
>Traceback (most recent call last):
>  File "D:/a/Utilities/python/ptyhon22/test.py", line 97, in ?
>    main()
>  File "D:/a/Utilities/python/ptyhon22/test.py", line 60, in main
>    crit = Critter(crit_name)
>  File "D:/a/Utilities/python/ptyhon22/test.py", line 8, in __init__
>    self.feed = feed            # I wrote this
>AttributeError: can't set attribute

>I add some codes to a program on a book. The lines that have "I wrote
>this" comment is the added codes. Could anyone tell me what is worng
>here?

[snip]

>class Critter(object):

This fails as you said:
>        self.feed = feed            # I wrote this

[snip]

And this would fail:
>    def __feed_time(self):          # I worte this
>        self.feed += 1              # I wote this

Because of this:
>    feed = property(__get_feed)     # I wrote this
which specifies only a 'get' method for the property.

[snip]

feed is a property, and there is not 'set' method for it, so it's behaving as
read-only.  Search for 'property' in your python docs.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From richardjones at optushome.com.au  Sat Feb 12 17:36:24 2005
From: richardjones at optushome.com.au (richard)
Date: Sun, 13 Feb 2005 09:36:24 +1100
Subject: Unittesting for web applications
References: <mailman.2443.1108204994.22381.python-list@python.org>
Message-ID: <420e84e8$0$5643$afc38c87@news.optusnet.com.au>

Sandip Bhattacharya wrote:
> Can someone suggest me some good resources for learning how to use
> unittests for web applications? Do we always have to cook up our own
> webpage scrapers to test the code?

http://www.mechanicalcat.net/tech/webunit/


    Richard



From peter at engcorp.com  Wed Feb  2 12:57:02 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 02 Feb 2005 12:57:02 -0500
Subject: new style exception handleing
In-Reply-To: <a677d2-h8g.ln1@pluto.i.infosense.no>
References: <a677d2-h8g.ln1@pluto.i.infosense.no>
Message-ID: <2LydnVuDKZ32iZzfRVn-qg@powergate.ca>

Ola Natvig wrote:
> Does anybody know why it's not possible to raise Exceptions which are 
> types (new-style-classes). I know all standard exceptions are classic 
> classes, but if you make a custom exception which both inherits from a 
> exception class and a new-style one the it causes a type error when raised.
> 
>  >>> class b(Exception, object): pass

This might not help you, but have you considered just making
your old-style class *contain a reference* to an instance
of whatever new-style class you want it to contain?  Then
the issue goes away.

I can't actually think of a reason to need to base an
exception on a new-style class, but perhaps you have a
good one...

-Peter


From stephen.thorne at gmail.com  Tue Feb  1 19:07:51 2005
From: stephen.thorne at gmail.com (Stephen Thorne)
Date: Wed, 2 Feb 2005 10:07:51 +1000
Subject: [perl-python] string pattern matching
In-Reply-To: <2uWdnWyp5M1Fip3fRVn-sQ@rogers.com>
References: <1107290707.549792.199860@c13g2000cwb.googlegroups.com>
	<mailman.1716.1107300060.22381.python-list@python.org>
	<2uWdnWyp5M1Fip3fRVn-sQ@rogers.com>
Message-ID: <3e8ca5c805020116073ee40f35@mail.gmail.com>

On Tue, 1 Feb 2005 18:59:18 -0500, Dan Perl <danperl at rogers.com> wrote:
> Perhaps someone will write a program to automatically follow up on every
> [perl-python] posting?  The follow-up could just contain a statement like
> the one Daniel mentions.  Obviously the program would be written in python.
> ;-)
> 
> Any suggestions on how to implement such a program?  How would it detect a
> new posting?  How would it send the follow-up?
> 
> Anyway, I agree with Daniel and I think that would not only warn newcomers
> to the group, but it would also allow many of us to move on without worrying
> about the effect that the perl-python postings may have on these newcomers.

I'd just like the python-list at python.org mailing list to drop his
posts on the floor so I don't have to read them.

But thats me.

Stephen.


From mario.lacunza at gmail.com  Wed Feb  9 17:03:07 2005
From: mario.lacunza at gmail.com (Mario Lacunza)
Date: Wed, 9 Feb 2005 17:03:07 -0500
Subject: Some questions...
Message-ID: <71593615050209140326f0d3d1@mail.gmail.com>

Hello,

Im new in Python, please  I need some information:

- Somebody know if: is possible use Python within Net Framework in
windows environment??
- Where found info about reports in Python? exist some program like
Crystal Reports??
-  Database access: Firebird , I dont found correct information about
this tools and his conection/working with Python.

Thanks!!!

-- 
Saludos / Best regards

Mario Lacunza
Email: mario.lacunza at gmail.com
Lima - Peru


From steven.bethard at gmail.com  Sun Feb 20 17:36:19 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 20 Feb 2005 15:36:19 -0700
Subject: Test for structure
In-Reply-To: <1108937287.079367.276910@g14g2000cwa.googlegroups.com>
References: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
	<mailman.2824.1108792560.22381.python-list@python.org>
	<1108937287.079367.276910@g14g2000cwa.googlegroups.com>
Message-ID: <HIqdnYQVyeBCjYTfRVn-oQ@comcast.com>

Terry Hancock wrote:
 > But you probably shouldn't do that. You should probably just test to
 > see if the object is iterable --- does it have an __iter__ method?
 >
 > Which might look like this:
 >
 > if hasattr(a, '__iter__'):
 >     print "'a' quacks like a duck"

Martin Miller top-posted:
> I don't believe you can use the test for a __iter__ attribute in this
> case, for the following reason:
> 
>>>>c1 = 'abc'
>>>>c2 = ['de', 'fgh', 'ijkl']
>>>>hasattr(c1, '__iter__')
> False
> 
>>>>hasattr(c2, '__iter__')
> True

Right.  str and unicode objects support iteration through the old 
__getitem__ protocol, not the __iter__ protocol.  If you want to use 
something as an iterable, just use it and catch the exception:

try:
     itr = iter(a)
except TypeError:
     # 'a' is not iterable
else:
     # 'a' is iterable

Another lesson in why EAPF is often better than LBYL in Python[1].

STeVe

[1] http://www.python.org/moin/PythonGlossary


From just at xs4all.nl  Sat Feb 26 10:42:39 2005
From: just at xs4all.nl (Just)
Date: Sat, 26 Feb 2005 16:42:39 +0100
Subject: any Python equivalent of Math::Polynomial::Solve?
Message-ID: <just-420C1F.16423926022005@news1.news.xs4all.nl>

While googling for a non-linear equation solver, I found 
Math::Polynomial::Solve in CPAN. It seems a great little module, except 
it's not Python... I'm especially looking for its poly_root() 
functionality (which solves arbitrary polynomials). Does anyone know of 
a Python module/package that implements that?

Just


From exogen at gmail.com  Fri Feb  4 01:18:18 2005
From: exogen at gmail.com (Brian Beck)
Date: Fri, 04 Feb 2005 01:18:18 -0500
Subject: advice needed for simple python web app
In-Reply-To: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
Message-ID: <ctv48p$75$1@eeyore.INS.cwru.edu>

Dan Perl wrote:
> Basically, what I'm looking for is a web server that accepts an HTTP request 
> and invokes a python script.  But I would like a "pythonic" solution so a 
> web server like Apache is a solution that I would like to avoid.  The server 
> should also be as simple as possible to administrate.

As M.E.Farmer suggested, CherryPy is definitely what you are looking 
for. I have done a bit of shopping around and this is pretty much as 
straightforward as you can get.

 From my experience, this appears to be the order from low-level to 
high-level interfaces:

1. mod_python: As complex as you need it to be, since you can control 
anything about the request & response process. But more up-front work 
and decisions to make than CherryPy.
2. mod_python with Vampire: Directs you toward a specific publishing 
framework that is similar to CherryPy.
3. CherryPy: Like Vampire but simpler and doesn't require mod_python. 
The simplest blend between low-level server interface and 
ease-of-publishing.
4. Twisted: Seems like this is a big package to work with, not sure how 
easy it makes publishing once you get started-- better that someone else 
comment on this.
5. Zope: The most complex solution, doesn't necessarily make the 'easy 
things easy.' But covers all fronts in terms of what a user would ever need.
6. Zope with Plone: Adds a ton of publishing functionality. Has many 
ways to extend, but none of them are fun. You'll have to learn such 
complex APIs that Python will rarely help you.

Of course there are more, like Webware, but you didn't mention that and 
I don't have experience with it.

--
Brian Beck
Adventurer of the First Order


From peter at engcorp.com  Sun Feb 27 10:56:44 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sun, 27 Feb 2005 10:56:44 -0500
Subject: Problem When Unit Testing with PMock
In-Reply-To: <1109483520.813509.171880@f14g2000cwb.googlegroups.com>
References: <1109423274.660110.156140@f14g2000cwb.googlegroups.com>
	<mailman.3095.1109443491.22381.python-list@python.org>
	<1109483520.813509.171880@f14g2000cwb.googlegroups.com>
Message-ID: <-ZKdnT5Dy7AmcLzfRVn-vA@powergate.ca>

steven at lczmsoft.com wrote:
>>def mockit(): raise StopIteration
>>now pass mockit()
> 
> 
> but it behaviors differenctly when pass in a mockit()  and pass in an
> iterator with empty.  so i think the code emulates nothing.

Is it possible that what you really need is a generator function
instead of just a regular one?

def mockit():
    raise StopIteration
    yield None

(The presence of the yield will let the compiler generate the
proper code for this to be a generator, but it will never
actually hit the yield statement when it executes...)

Just a thought.

-Peter


From anthra.norell at tiscalinet.ch  Mon Feb 21 05:33:25 2005
From: anthra.norell at tiscalinet.ch (Anthra Norell)
Date: Mon, 21 Feb 2005 11:33:25 +0100
Subject: IDLE output too slow for practical use after upgrade from P2.2.2 to
	P2.4
Message-ID: <001101c51800$c6d76a40$0201a8c0@mcuf7>

Hi,
   I upgraded from 2.2.2 to 2.4 and all is well except the output to the IDLE window is now twenty times slower than it was before, making the window utterly unusable for verbose output. The statement -- for i in range (100): print i -- now takes about forty-five seconds to complete! Used to be two.
Python 2.4 on Windows ME.
Hints will be gratefully received by 
Frederic


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From jstroud at mbi.ucla.edu  Mon Feb 21 23:20:35 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 21 Feb 2005 20:20:35 -0800
Subject: NOOB coding help....
In-Reply-To: <69012ed09e48920e1e80e311bca1659c@localhost.talkaboutprogramming.com>
References: <69012ed09e48920e1e80e311bca1659c@localhost.talkaboutprogramming.com>
Message-ID: <200502212020.35976.jstroud@mbi.ucla.edu>

Could you phrase this in the form of a question, like Jeopardy?


On Monday 21 February 2005 08:08 pm, Igorati wrote:
> Ok, this is what I have so far:
>
> #This program will ask for a user to imput numbers. The numbers will then
> be calculated
> #to find the statistical mean, mode, and median. Finallly the user will be
> asked
> #if he would like to print out the answers.
> list = [ ]
> a = 1
> print 'Enter numbers to add to the list. (Enter 0 to quit.)'
> while a != 0 :
>     a = input('Number? ')
>     list.append(a)
> zero = list.index(0)
> del list[zero]
> list.sort()
>
> variableMean = lambda x:sum(x)/len(x)
> variableMedian =  lambda x: x.sort() or x[len(x)//2]
> variableMode = lambda x: max([(x.count(y),y) for y in x])[1]
> s = variableMean(list)
> y = variableMedian(list)
> t = variableMode (list)
>
> x = (s,y,t)
> inp = open ("Wade_StoddardSLP3-2.py", "r")
> outp = open ("avg.py", "w")
> f = ("avg.py")
> for x in inp:
>     outp.write(x)
> import pickle
> pickle.dump(x, f)
>
>
> print 'Thank you! Would you like to see the results after calculating'
> print 'The mode, median, and mean? (Please enter Yes or No)'
> raw_input('Please enter Yes or No:')
> if raw_input == Yes:
>
>     f = open("avg.py","r")
>     avg.py = f.read()
>     print 'The Mean average is:', mean
>     print 'The Median is:', meadian
>     print 'The Mode is:', mode
>
> I am attempting to make it so that I can save the mean, meadian, and mode
> and then if the user wants the data to give it to him. Thank you for any
> assistance you can provide!
>
> Wade

-- 
James Stroud, Ph.D.
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095


From golux at comcast.net  Fri Feb 25 22:19:45 2005
From: golux at comcast.net (Stephen Waterbury)
Date: Fri, 25 Feb 2005 22:19:45 -0500
Subject: Yet another logo design...
In-Reply-To: <6c9897c2.0502251551.2b8feb@posting.google.com>
References: <6c9897c2.0502251551.2b8feb@posting.google.com>
Message-ID: <421FEAD1.3080507@comcast.net>

Mark wrote:
> .... Long story short
> here is a contemporary logo design by myself:
> 
> http://www.imagezilla.com/img.php?im=1182129642_logo.png
> 
> Any comments welcome...
> *runs*

Heh.  As a graphic design, I think it's very nice.
Unfortunately, it's probably a bit too "scary" as
a logo for Python the language.  There's sort of a
tradition of either friendly cartoon snakes or
else designs that are sufficiently abstract that
they don't look like real snakes.  ;)

Steve


From aleaxit at yahoo.com  Sun Feb  6 02:47:31 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 6 Feb 2005 08:47:31 +0100
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<qb1a01lk3mv4vp852q88prqb9al336h9r2@4ax.com>
	<1grj036.r13xcy1d72inbN%aleaxit@yahoo.com>
	<2qba01d1men2ai48gp4cojo2e28rd5g9ob@4ax.com>
Message-ID: <1grjzia.1a4qr9q1t3p77bN%aleaxit@yahoo.com>

Arthur <ajsiegel at optonline.com> wrote:

> Do the STUPID firms use Python as well.

Yes, they're definitely starting to do so.


> Why?  

The single most frequent reason is that some techie sneaked it in, for
example "just for testing" or "to do a prototype" or even without any
actual permission.  Firms hardly ever follow the "build one to throw
away" dictum (and some argue that the dictum is wrong and the firms are
right), so, once it's in, it's in.

There are other reasons, such as "it's intolerable that we're using half
a dozen different languages, we need to unify all our software and
rewrite it into just one language" -- a rather silly reason, and this
plan (to rewrite perfectly good working software just for the purpose of
having it all in one language) generally doesn't come to fruition, but
meanwhile there are very few candidate languages that _could_ fill all
the different niches *and* not bust the PHB's softare-purchase business.

Even the various "success stories" we've collected (both on websites,
and, more impressive to PHBs, into paper booklets O'Reilly has printed)
play a role.  ``NASA uses it for space missions, so of course we must
use it to control our hot dog franchises'' -- we DID say we're talking
about stupid firms, right?

This is a good development, overall.  Against stupidity, the gods
themselves contend in vain; Python's entrance into stupid firms broadens
its potential appeal from less than 10% to around 100% of the market,
which is good news for sellers of books, tools, training, consultancy
services, and for Python programmers everywhere -- more demand always
helps.  *BUT* the price is eternal vigilance...


Alex


From john at grulic.org.ar  Wed Feb  9 11:21:50 2005
From: john at grulic.org.ar (John Lenton)
Date: Wed, 9 Feb 2005 13:21:50 -0300
Subject: multi threading in multi processor (computer)
In-Reply-To: <1107964587.818199.223980@g14g2000cwa.googlegroups.com>
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<420a2938$0$22987$626a14ce@news.free.fr>
	<1107964587.818199.223980@g14g2000cwa.googlegroups.com>
Message-ID: <20050209162150.GC12902@grulic.org.ar>

On Wed, Feb 09, 2005 at 07:56:27AM -0800, ajikoe at gmail.com wrote:
> Hello Pierre,
> 
> That's a pity, since when we have to run parallel, with single
> processor is really  not efficient. To use more computers I think is
> cheaper than to buy super computer in developt country.

and buying more, cheap computers gives you more processing power than
buying less, multi-processor computers. So the best thing you can do
is learn to leverage some distributed computing scheme. Take a look at
Pyro, and its Event server.

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
When the cup is full, carry it level.
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From secun at yahoo.com  Thu Feb 24 16:34:25 2005
From: secun at yahoo.com (Chris)
Date: Thu, 24 Feb 2005 21:34:25 GMT
Subject: Python and "Ajax technology collaboration"
References: <1109193970.029421.213490@l41g2000cwc.googlegroups.com>
	<opsmn8bcnw6yt6e7@news.cisco.com>
	<1gsgn7j.1sr4el39la6ctN%dial#####$$NOSPAM##$#$##@gmail.com>
Message-ID: <MPG.1c8812b86921d563989696@news2.atlantic.net>

Does anyone else have any Nevow examples?


In article <1gsgn7j.1sr4el39la6ctN%dial#####$$NOSPAM##$#$##@gmail.com>, 
dial#####$$NOSPAM##$#$##@gmail.com says...
> aurora <aurora00 at gmail.com> wrote:
> 
> > It was discussed in the last Bay Area Python Interest Group meeting.
> > 
> > Thursday, February 10, 2005
> > Agenda: Developing Responsive GUI Applications Using HTML and HTTP
> > Speakers: Donovan Preston
> > http://www.baypiggies.net/
> > 
> > The author has a component LivePage for this. You may find it from  
> > http://nevow.com/. Similar idea from the Javascript stuff but very Python
> > centric.
> 
> As an example for that technology (LivePage) I have this:
> 
> http://vercingetorix.dyndns.org:20080/
> 
> Which is an online forum where the "Quote & Reply" function is done with
> XMLHttpRequest and Python.
> 
> Implementing this stuff in the forum with Nevow ( the framework created
> by Donovan who I help to develop ) was almost effortless. 
> 
> 


From schulz at sunbroy2.informatik.tu-muenchen.de  Wed Feb 16 14:04:57 2005
From: schulz at sunbroy2.informatik.tu-muenchen.de (Stephan Schulz)
Date: Wed, 16 Feb 2005 19:04:57 +0000 (UTC)
Subject: Imported or executed?
Message-ID: <slrnd17668.3nr.schulz@sunbroy2.informatik.tu-muenchen.de>

Hi All,

I've written a Python replacement of fixbb, as shell/awk script that
will create tightly fitting bounding boxes for PostScript files.

Most of the functionality is encapsulated in a small function called
fixbb(filename). I'm importing this into other code via 'import'.

A few lines of code for command line handling make the module into a
freestanding program. For simplicity and ease of maintenance, I would
rather keep library and program as a single file.

However, the command line code is also executed when the module is
imported, not only when the stand-alone program is executed. That is
not, of course, intended (or working). 

Is there a (portable, standard) way for the program/module to find out
if it is imported or executed stand-alone?

You can find the code at
http://www.eprover.org/SOFTWARE/utilities.html

Bye,

    Stephan

-- 
-------------------------- It can be done! ---------------------------------
   Please email me as schulz at informatik.tu-muenchen.de (Stephan Schulz)
----------------------------------------------------------------------------


From removethis.kartic.krishnamurthy at gmail.com  Fri Feb 25 08:18:27 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Fri, 25 Feb 2005 13:18:27 GMT
Subject: wxpython tutorials
In-Reply-To: <1109309093.384392.59230@l41g2000cwc.googlegroups.com>
References: <1109309093.384392.59230@l41g2000cwc.googlegroups.com>
Message-ID: <DAFTd.39313$H05.23284@twister.nyroc.rr.com>

Raghul said the following on 2/25/2005 12:24 AM:
> hi,
> 
>     I want to learn Wxpython to work in windows.Is there any tutorials
> available?Pls specify the link that will be easy to learn for beginers
> like me
> 


Raghul - If you have the patience, you can look at the demo source code. 
A good thing about the latest wxPython Demo version is that you can 
change the demo code in the *running* demo and execute the changed code 
to to see the results right away. I love that feature!

So, my suggestion to you is to start reading tutorials. A nice tutorial 
to get your feet wet is 
http://www-106.ibm.com/developerworks/library/l-wxpy/


Once you feel comfortable with drawing a basic frame with a menu bar and 
able to handle events, you can build complex apps using a demo as your 
guide. Also, there is a weapon in your arsenal in the form of the 
wxWidgets Help Manual that is installed with wxPython. It is geared 
towards the wxWidget C++ library but the information can be used to 
build wxPython apps rather easily. The Help also annotates differences 
between the C++ class and wxPython (and wxPerl) usage where approporiate.

Have fun!
-Kartic



From bob at passcal.nmt.edu  Mon Feb 14 11:38:10 2005
From: bob at passcal.nmt.edu (Bob Greschke)
Date: Mon, 14 Feb 2005 09:38:10 -0700
Subject: Tkinter option_add for menu radiobutton
References: <hIOdnRP2Rei7SJLfRVn-1g@nmt.edu> <opsl6qgpu1rqur0o@eb.pragmadev>
Message-ID: <7emdnUHyqZVsTo3fRVn-3g@nmt.edu>

"Eric Brunel" <eric_brunel at despammed.com> wrote in message 
news:opsl6qgpu1rqur0o at eb.pragmadev...
> On Sun, 13 Feb 2005 15:31:18 -0700, Bob Greschke <bob at passcal.nmt.edu> 
> wrote:
> [snip]
>> Root.option_add("*Radiobutton*selectColor", "black")
>>
>> also works fine for regular radiobuttons.  What I can't
>> do is get the selectColor of the radiobutton's in the
>> menu to be black...the x.add_radiobutton() ones.
>>
>> Root.option_add("*Menu.Radiobutton*selectColor", "black")...nope
>> Root.option_add("*Menu*selectColor", "black")...no change
>
> Strange... The last one works for me (as it should - see 
> http://www.tcl.tk/man/tcl8.4/TkCmd/menu.htm). What platform are you on and 
> what is your tcl/tk version?
>  - Eric Brunel -

Doh!  You're right.  Now it is here too.  I must have been typing something 
wrong...again.  This was Python2.3 and whatever version of tcl/tk that comes 
with it on Linux.

Thanks! 




From ionel.mc at gmail.com  Wed Feb 16 18:01:52 2005
From: ionel.mc at gmail.com (ionel)
Date: Thu, 17 Feb 2005 01:01:52 +0200
Subject: How to implement a file lock ??
In-Reply-To: <b322b4e6050216150055d8996b@mail.gmail.com>
References: <b322b4e6050216022743fdf9@mail.gmail.com>
	<BAY17-F4F5178CBF5808D410E3DECB6C0@phx.gbl>
	<b322b4e6050216150055d8996b@mail.gmail.com>
Message-ID: <b322b4e605021615011a7c0c3@mail.gmail.com>

i'm having some problems...
Traceback (most recent call last):
 File "D:\_ROOT\pywww\opinia\test2.py", line 5, in ?
   portalocker.lock(log, portalocker.LOCK_EX)
 File "D:\_ROOT\pywww\opinia\portalocker.py", line 61, in lock
   win32file.LockFileEx(hfile, flags, 0, 0xffff0000, __overlapped)
OverflowError: long int too large to convert to int

any sugestions ?

- Hide quoted text -


On Tue, 15 Feb 2005 10:22:41 +0000, Alan Kennedy <alanmk at hotmail.com> wrote:
> [ionel]
> > is there a cross-platform library or module for file locking?
> > or at least a win32 implementation.
> >
> > i'm trying to get a lock on some file in a cgi script. ( i got my data
> > erased a few times :P )
>
> portalocker - Cross-platform (posix/nt) API for flock-style file locking.
>
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/65203
>
> HTH,
>
> --
> alan kennedy
> ------------------------------------------------------
> email alan:              http://xhaus.com/contact/alan
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From ncoghlan at iinet.net.au  Tue Feb 22 04:55:25 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Tue, 22 Feb 2005 19:55:25 +1000
Subject: Problem with the sort() function
In-Reply-To: <64827323f7134aea810788b3ec6cf516@localhost.talkaboutprogramming.com>
References: <64827323f7134aea810788b3ec6cf516@localhost.talkaboutprogramming.com>
Message-ID: <421B018D.20704@iinet.net.au>

clementine wrote:
> Hi,
> 
> I have an array of arrays in the form of 
> list = [[3,'fork',0.3,1],[2,'fork,0.1,2],[3,'exec',0.2,2]]
> 
> The in-built sort(),list.sort() sorts on the first element, if the first
> elts are equal then it sorts on the second elt and so on...But i really
> dont want to search on the second elt if the first elts are equal...the
> 1-D lists shud be left in the same position i.e. i want the sorted list to
> be [[2,'fork',0.1,2],[3,'fork,0.3,1],[3,'exec',0.2,2]] and not
> [[2,'fork',0.1,2],[3,'exec',0.2,2],[3,'fork,0.3,1]].

Try this:

Py> from operator import itemgetter
Py> list = [[3,'fork',0.3,1],[2,'fork',0.1,2],[3,'exec',0.2,2]]
Py> list.sort(key=itemgetter(0))
Py> list
[[2, 'fork', 0.10000000000000001, 2], [3, 'fork', 0.29999999999999999, 1], [3, '
exec', 0.20000000000000001, 2]]

If the 'key' argument isn't accepted (i.e. you aren't using Python 2.4), you'll 
need to do the decoration manually:

def mysort(iterable, cmp=None, key=None, reverse=False):
     "return a sorted copy of its input"
     if sys.version_info >= (2,4):
         return sorted(iterable, cmp, key, reverse)
     seq = list(iterable)
     if reverse:
         seq.reverse()        # preserve stability
     if key is not None:
         seq = [(key(elem), i, elem) for i, elem in enumerate(seq)]
     seq.sort(cmp)
     if key is not None:
         seq = [elem for (key, i, elem) in seq]
     if reverse:
         seq.reverse()
     return seq

list = mysort([[3,'fork',0.3,1],[2,'fork',0.1,2],[3,'exec',0.2,2]],
                key=lambda x: x[0])

(Taken from Raymond's code in:
http://mail.python.org/pipermail/python-list/2005-January/263275.html)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From cam.ac.uk at mh391.invalid  Wed Feb 16 19:19:15 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Thu, 17 Feb 2005 00:19:15 +0000
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <mailman.2716.1108582538.22381.python-list@python.org>
References: <37hippF4gcimiU1@individual.net>	<111773qkev2r045@corp.supernews.com>
	<mailman.2716.1108582538.22381.python-list@python.org>
Message-ID: <cv0nu8$bk7$1@gemini.csx.cam.ac.uk>

Fredrik Lundh wrote:

> I've proposed adding a "join" built-in that knows about the available string types,
> and does the right thing for non-string objects.

That would be *so* useful. I frequently have to use the

"".join(map(str, mylist))

idiom, which is a wart.
-- 
Michael Hoffman


From jerf at jerf.org  Thu Feb 10 10:10:28 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 10 Feb 2005 10:10:28 -0500
Subject: namespaces module (a.k.a. bunch, struct, generic object,
	etc.) PEP
References: <GaudndOHLML3M5bfRVn-vg@comcast.com>
Message-ID: <pan.2005.02.10.15.10.26.594432@jerf.org>

On Thu, 10 Feb 2005 11:56:45 -0700, Steven Bethard wrote:

> In the "empty classes as c structs?" thread, we've been talking in some
> detail about my proposed "generic objects" PEP.  Based on a number of
> suggestions, I'm thinking more and more that instead of a single
> collections type, I should be proposing a new "namespaces" module instead.

Context: I've never been excited by this proposal.

But I am intrigued to note that with a couple of differences, you've now
converged on a module I've already written for my own use, which I called
a Registry. I actually subclassed 'dict', added some methods to use
dotted-access as you describe, and added some methods for accessing and
initializing a deeper key (basically a "get" that can handle hierarchy)
and a couple of other things.

There are worse things for application config storing than a pickled
Namespace. (Not human readable, but if you don't care about that, as I
generally don't, it's close to usable.)


From alipolatel at yahoo.com  Tue Feb  1 03:20:17 2005
From: alipolatel at yahoo.com (Ali Polatel)
Date: Tue, 1 Feb 2005 00:20:17 -0800 (PST)
Subject: Programming challenge (C++ and Python)
Message-ID: <20050201082017.44023.qmail@web61002.mail.yahoo.com>

    Dear Python friends,
    I need a favor.I play chess at a chess server with the name ICC(www.chessclub.com). I want to write a plugin for their interface using Python.
    I don't have any idea about how to write a plugin but I found out that the server administrator has written a Plugin Development Kit in C++ for those who wish to write plugins for the interface.I don't know C++ so I cannot convert this kit into python scripts.Can anyone do this for me? or can anyone examine those scripts and tell me a way how to write those with python?The development kit is avaliable at the site ftp://ftp.chessclub.com/pub/icc/interface/blitzin2/plugins/
under the name PluginDevkit.zip
Any kind of help is appreciated.
Regards,
Ali Polatel 

		
---------------------------------
Do you Yahoo!?
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From martijn at gamecreators.nl  Mon Feb 28 11:30:59 2005
From: martijn at gamecreators.nl (martijn at gamecreators.nl)
Date: 28 Feb 2005 08:30:59 -0800
Subject: bsddb for k, v in db.items(): do order the numbers ?
Message-ID: <1109608259.047662.256140@z14g2000cwz.googlegroups.com>

WHen I use the code below and printing all the results i get this:
------
0 1 10
11 2 3
4 5 6
7 8 9
------
But I want
------
0 1 2
3 4 5
6 7 8
9 10 11
------

Thanks for helping

import bsddb

def addRow(key,val):
    db[key] = key
    print key,

db = bsddb.btopen('test3.db','n')

#maar 3 kolomen
for i in range(4):
    addRow('%d'%(i*2+0+i),'test%d'%(i*2+0+i))
    addRow('%d'%(i*2+1+i),'test%d'%(i*2+1+i))
    addRow('%d'%(i*2+2+i),'test%d'%(i*2+2+i))

#-----
print 'kolom1','kolom2','kolom3'

p=0
for k, v in db.items():
    if p == 0:
        p = p+1
        print v,
    elif p == 1:
        p = p+1
        print v,
    elif p == 2:
        p=0
        print v,
        print



From python-url at phaseit.net  Tue Feb 15 01:08:04 2005
From: python-url at phaseit.net (Cameron Laird)
Date: Tue, 15 Feb 2005 06:08:04 GMT
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Feb 15)
Message-ID: <cus2r9$21m$1@lairds.us>

QOTW:  "I've forgotten what we are arguing about, but I'm sure I'm
right." -- Jive Dadson

"I believe the best strategy against Identity theft is bad
credit." -- Tom Willis

"You can't live without unit tests.  And once you have unit tests, the
added value of declarations is tiny, and their cost remains." -- martellibot


    Make history, instead of having it happen to you:  the 
    upcoming PyPy Sprint promises to be singular:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/6f0458c61169eff1/
        
    Brian van den Broek, Roy Smith, BJ=F6rn_Lindqvist, Jason
    Diamond, and Grig Gheorghiu introduce the crucial subject
    of unit-testing in Python for those new to test-driven
    development:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/bbda0385fa4e1de7/
	http://www.onlamp.com/pub/a/python/2004/12/02/tdd_pyunit.html

    How do you know that Python has "arrived"?  When its use is
    the least interesting part of a project.  Notice that, once
    again, Python is handy in "process control", traditionally
    a domain for assembler, C, and Basic:
        http://www.linuxjournal.com/article/7403

    Philip dives deeply into Python optimization issues:
        http://dirtsimple.org/2005/02/optimization-surprises.html
	http://dirtsimple.org/2005/02/from-nine-to-five.html

    Not only does Martin Franklin provide a new TableList widget
    for Tkinter, but he clearly describes how he did so, apparently
    in the belief that such knowledge might be useful to others:
        http://mail.python.org/pipermail/tkinter-discuss/2005-February/000320.html
    Stewart Midwinter answers with a "poor-man's table widget":
        http://mail.python.org/pipermail/tkinter-discuss/2005-February/000325.html
        
    Philip Schoenborn explores RAII and related Python deli-
    cacies related to resource management--in print!
        http://ddj.com/articles/2005/0503/


========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Brett Cannon continues the marvelous tradition established by 
    Andrew Kuchling and Michael Hudson of intelligently summarizing
    action on the python-dev mailing list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    The Python Business Forum "further[s] the interests of companies
    that base their business on ... Python."
	http://www.python-in-business.org

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    deli.cio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topics/pythonurl/         
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.




From ilias at lazaridis.com  Tue Feb 15 13:29:07 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 20:29:07 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <86ll9piuj8.fsf@guru.mired.org>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr> <37bkemF5a7s7vU1@individual.net>
	<cut6nh$rpk$1@usenet.otenet.gr> <86ll9piuj8.fsf@guru.mired.org>
Message-ID: <cutf1h$576$1@usenet.otenet.gr>

Mike Meyer wrote:
> Ilias Lazaridis <ilias at lazaridis.com> writes:
> 
>>MinGW compatibility is not my need.
> 
> Then why do you waste so much effort whining about it not being given
> to you?
> 
>>It is an community need.
> 
> Based on the evidence at hand, this is a false statement.
> 
>       <mike

MinGW compatibility is not [only] my need.

It is an community need [at least partially]

.

-- 
http://lazaridis.com


From caleb.hattingh at gmail.com  Tue Feb  8 02:03:17 2005
From: caleb.hattingh at gmail.com (Caleb Hattingh)
Date: 7 Feb 2005 23:03:17 -0800
Subject: Basic file operation questions
In-Reply-To: <ctu62q$gud$04$1@news.t-online.com>
References: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
	<opsllt9r191js0xs@news.telkomsa.net>
	<mailman.1808.1107431422.22381.python-list@python.org>
	<ctt53b$l5u$00$1@news.t-online.com>
	<opslnm1cge1js0xs@news.telkomsa.net>
	<ctu62q$gud$04$1@news.t-online.com>
Message-ID: <1107846197.701686.303390@l41g2000cwc.googlegroups.com>

Peter, that was very clear, thanks.

> So not only is
>
> for line in file(...):
>    # do stuff
>
> the most elegant, it is also the fastest. file.readlines() comes
close, but
> is only viable for "small" files.



From ilias at lazaridis.com  Tue Feb 15 15:17:42 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 22:17:42 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2647.1108497874.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr>	<cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr>	<cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr>	<cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr>	<37bkemF5a7s7vU1@individual.net>
	<cut6nh$rpk$1@usenet.otenet.gr>	<86ll9piuj8.fsf@guru.mired.org>
	<cutf1h$576$1@usenet.otenet.gr>	<mailman.2643.1108495246.22381.python-list@python.org>	<cutibq$j8e$1@usenet.otenet.gr>
	<mailman.2647.1108497874.22381.python-list@python.org>
Message-ID: <cutld5$30s$1@usenet.otenet.gr>

Adam DePrince wrote:
[...]
>>>If the community needs it, a member of said community has both complete
>>>unfettered freedom and a supportive environment to make it.   
>>
>>Which is this "supportive environment"?
> 
> You're on it.  You drive a car?  You have to treat it right to get what
> you want, right?  Same here.  Ask correctly, and you will get your
> answers.  

Your interpretation/definition of "asking correctly" is irrelevant to me.

[...]
>>>Make us proud Ilias.  But whatever you do, don't beg.
>>
>>I don't beg.
> 
> Really, remember this:
> 
>> " My questions:   a) Why does the Python Foundation not provide
>>additionally a binary version, compiled with MinGW or another
>>open-source compiler?"
> 
> Many languages have the notion of the "rhetorical question."   Also
[...] - (faulty interpretations, suggesting processing model)

no comments.

.

-- 
http://lazaridis.com


From peter at somewhere.com  Thu Feb 10 08:04:31 2005
From: peter at somewhere.com (Peter Maas)
Date: Thu, 10 Feb 2005 14:04:31 +0100
Subject: hard_decoding
In-Reply-To: <mailman.2298.1108027660.22381.python-list@python.org>
References: <mailman.2298.1108027660.22381.python-list@python.org>
Message-ID: <cufbnn$g22$1@swifty.westend.com>

Tamas Hegedus schrieb:
> Do you have a convinient, easy way to remove special charachters from 
> u'strings'?
> 
> Replacing:
> ??????     => A
> ????    => e
> etc.
> 'L0xe1szl0xf3' => Laszlo
> or something like that:
> 'L\xc3\xa1szl\xc3\xb3' => Laszlo

 >>> ord(u'?')
235
 >>> ord(u'e')
101
 >>> cmap = {235:101}
 >>> u'hello'.translate(cmap)
u'hello'
 >>> u'h?llo'.translate(cmap)
u'hello'

The inconvenient part is to generate cmap. I suggest you write a
helper class genmap for this:

 >>> g = genmap()
 >>> g.add(u'??????', u'A')
 >>> g.add(u'????', u'e')
 >>> 'L?szl?'.translate(g.cmap())
Laszlo

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From lee at example.com  Thu Feb 10 20:21:19 2005
From: lee at example.com (Lee Harr)
Date: Fri, 11 Feb 2005 01:21:19 GMT
Subject: pygame and music
References: <4cc9a89e.0502092008.249582ac@posting.google.com>
Message-ID: <jMTOd.250$6p7.106@news01.roc.ny>

On 2005-02-10, maxime <maxime_phan at hotmail.com> wrote:
> Hi, I try to develop a game in python and pygame.
> In my game I play a music (.mid with pygame.mixer.music) but sometime
> I need to accelerate it but I don't see how to do that with pygame. Is
> it possible? If not, do you know an other python music lib that do
> that?
> Thanks a lot


I do not know if you can change this on the fly (that is,
after the sound system is initialized) but you can try
something with init() or pre_init() mentioned here:
http://pygame.org/docs/ref/pygame_mixer.html

The best place to ask is on the pygame mailing list:
http://www.pygame.org/info.shtml#maillist


From douardda at free.fr  Tue Feb  1 17:40:12 2005
From: douardda at free.fr (David Douard)
Date: Tue, 01 Feb 2005 23:40:12 +0100
Subject: Redirecting stdout/err under win32 platform
References: <41fbd6b5$0$6098$626a14ce@news.free.fr>
	<1107149696.809645.56180@z14g2000cwz.googlegroups.com>
Message-ID: <42000256$0$513$626a14ce@news.free.fr>

Alan,

I did search Google for this problem (not enough, thou).
In fact, I found some kind of solution (by myself, not that much on Google),
but it is not really satisfactory.

I have used win32 pipes to do so (win32api.CreatePipe). I can redirect
stdout/stderr to it from my python code (even redirecting the stdout/stderr
from my C lib). 
But I still have a problem with this solution (well, 2):
- it is *much* more complicated than any solution available on Unix like
systems (not really a problem, but),
- it not synchronous at all. And I'd like it to be so (or almost so).

David



yaipa wrote:

> David,
> 
> Googling comp.lang.python /w this string "stderr win32" yielded 109
> results.
> So I think if you poke around a bit you will find your answer in the
> archives.
> 
> Sorry for no direct help tonight...
> 
> Cheers,
> 
> --Alan
> David Douard wrote:
>> Hi everybody,
>>
>> let me explain by problem:
>> I am working on an application which consists in a C++ dll (numeric
>> computations) and a Python IHM (Python/Tk), which must run under
> Linux and
>> win32. My problem is the C++ lib does write stuffs on its stdout, and
> I
>> would like to print those messages in a Tk frame. When I run the
>> computation, it has it's own thread.
>>
>> So my question is : how van I redirect the dll's stdout to something
> I can
>> retrieve in Python (pipe, socket,...)?
>>
>> I can do it easily under Linux. I made tests with a socket which just
> works
>> fine. In the threaded function (that will do the heavy computation),
> I
>> write:
>>
>> import os, sys
>> from socket import *
>> s=socket(AF_UNIX, SOCK_STREAM)
>> s.connect(...)
>> os.dup2(sys.__stdout__.fileno(), s.fileno())
>> very_intensive_function(many_parameters)
>> s.close()
>>
>> That's OK under Linux, but does not work under win32 (even if I use
> an INET
>> localhost socket), cause I cannot do the os.dup2 trick (Windows does
> not
>> want to consider a socket as a file! What a shity system!).
>>
>> So my question is : is there a simple solution ? I have tested
> different
>> solutions. I am trying hacks with pipes created with the win32api.
> But I
>> have not yet managed this simple operation.
>>
>> Note that I have no access to the dll source code, so I cannot modify
> it so
>> it uses a named pipe (for example) as message output pipe instead os
>> stdout...
>> 
>> Thanks,
>> David



From jjl at pobox.com  Sun Feb  6 09:16:35 2005
From: jjl at pobox.com (John J. Lee)
Date: 06 Feb 2005 14:16:35 +0000
Subject: Insane import behaviour and regrtest.py: heeelp
References: <87sm4aws3v.fsf@pobox.com>
	<mailman.2007.1107659039.22381.python-list@python.org>
Message-ID: <876515ixj0.fsf@pobox.com>

Nick Coghlan <ncoghlan at iinet.net.au> writes:

> John J. Lee wrote:
> > The only change I made to regrtest other than the print statements was
> > to add Lib to sys.path, so I pick up modules from CVS instead of the
> > installed 2.4 versions (yeah, I know I should build and install a
> > python2.5 executable from CVS, but I don't see how that's relevant here).
> 
> I didn't read your whole message so I may be off track here, but
> regrtest.py has some arguably demented path handling behaviour, and
> it's driven mainly by the physical location of regrtest.py. In
> particular:
> 
> def findtestdir():
>      if __name__ == '__main__':
>          file = sys.argv[0]
>      else:
>          file = __file__
>      testdir = os.path.dirname(file) or os.curdir
>      return testdir
> 
> So intead of adding anything to sys.path, tweak the call to 'main' on
> the final line to set "testdir" appropriately.

Nope: that just affects finding the *names* of the tests.  It does not
determine the location from which they are actually imported.  I tried
it, and I get the same results as before (the test modules from my
installed copy of Python are picked up instead of the local copies in
my CVS checkout's Lib/test, apparently entirely contrary to sys.path).


John


From irmen.NOSPAM at xs4all.nl  Fri Feb 11 17:07:42 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Fri, 11 Feb 2005 23:07:42 +0100
Subject: is there a safe marshaler?
In-Reply-To: <mailman.2421.1108158751.22381.python-list@python.org>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl><1108051828.483222.62670@z14g2000cwz.googlegroups.com>	<420b9281$0$28982$e4fe514c@news.xs4all.nl>
	<mailman.2421.1108158751.22381.python-list@python.org>
Message-ID: <420d2cae$0$28979$e4fe514c@news.xs4all.nl>

Fredrik Lundh wrote:

> the problem is that the following may or may not reach the "done!" statement,
> somewhat depending on python version, memory allocator, and what data you
> pass to dumps.
> 
> import marshal
> 
> data = marshal.dumps((1, 2, 3, "hello", 4, 5, 6))
> 
> for i in range(len(data), -1, -1):
>     try:
>         print marshal.loads(data[:i])
>     except EOFError:
>         print "EOFError"
>     except ValueError:
>         print "ValueError"
> 
> print "done!"
> 
> (try different data combinations, to see how far you get on your platform...)

Python 2.4 on my windows box crashes with
Fatal Python error: PyString_InternInPlace: strings only please!

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.
c:\> _


So indeed it seems that marshal is not safe yet :-|


> fixing this should be relatively easy, and should result in a safe unmarshaller (your
> application will still have to limit the amount of data fed into load/loads, of course).

Okay.

--Irmen


From blured75 at hotmail.com  Tue Feb 22 03:20:07 2005
From: blured75 at hotmail.com (denis)
Date: 22 Feb 2005 00:20:07 -0800
Subject: use python / qt with cygwin
Message-ID: <b5ad427b.0502220020.6c24f7ac@posting.google.com>

Hello,

Do you know if it is possible to use python + qt bindings in cygwin ?
I've looked inside kde / cygwin. There is a package named qt-gcc-3 but
I did'nt find the qt bindings for python :/ Is there a way to do that
? Or am I obliged to use tkinter to make user interfaces when I'm with
python / cygwin ?

Regards,
blureD.


From edvard+news at majakari.net  Fri Feb 25 01:33:14 2005
From: edvard+news at majakari.net (Edvard Majakari)
Date: Fri, 25 Feb 2005 08:33:14 +0200
Subject: Unit testing - one test class/method, or test class/class
Message-ID: <87y8ddywr9.fsf@titan.staselog.com>


Hi,

I just found py.test[1] and converted a large unit test module to py.test
format (which is actually almost-no-format-at-all, but I won't get there
now). Having 348 test cases in the module and huge test classes, I started
to think about splitting classes. Basically you have at least three obvious
choises, if you are going for consistency in your test modules:

Choise a:

Create a single test class for the whole module to be tested, whether it
contains multiple classes or not.

...I dont think this method deserves closer inspection. It's probably rather
poor method to begin with. With py.test where no subclassing is required
(like in Python unittest, where you have to subclass unittest.TestCase)
you'd probably be better off with just writing a test method for each class
and each class method in the module.

Choise b:

Create a test class for each class in the module, plus one class for any
non-class methods defined in the module.

+ Feels clean, because each test class is mapped to one class in the module
+ It is rather easy to find all tests for given class
+ Relatively easy to create class skeleton automatically from test module
  and the other way round

- Test classes get huge easily
- Missing test methods are not very easy to find[2]
- A test method may depend on other tests in the same class

Choise c:

Create a test class for each non-class method and class method in the tested
module.

+ Test classes are small, easy to find all tests for given method
+ Helps in test isolation - having separate test class for single method
  makes tested class less dependent of any other methods/classes
+ Relatively easy to create test module from existing class (but then you
  are not doing TDD!) but not vice versa

- Large number of classes results in more overhead; more typing, probably
  requires subclassing because of common test class setup methods etc.

What do you think, any important points I'm missing?

Footnotes:
[1]  In reality, this is a secret plot to advertise py.test, see
     http://codespeak.net/py/current/doc/test.html

[2] However, this problem disappears if you start with writing your tests
    first: with TDD, you don't have untested methods, because you start by
    writing the tests first, and end up with a module that passes the tests
 

--
# Edvard Majakari		Software Engineer
# PGP PUBLIC KEY available    	Soli Deo Gloria!
One day, when he was naughty, Mr Bunnsy looked over the hedge into Farmer
Fred's field and it was full of fresh green lettuces. Mr Bunnsy, however, was
not full of lettuces. This did not seem fair.  --Mr Bunnsy has an adventure


From JoshuaACohen at gmail.com  Wed Feb  9 11:09:39 2005
From: JoshuaACohen at gmail.com (Josh)
Date: 9 Feb 2005 08:09:39 -0800
Subject: Reportlab and Barcodes
In-Reply-To: <mailman.2252.1107964089.22381.python-list@python.org>
References: <1107894763.331701.26470@c13g2000cwb.googlegroups.com>
	<mailman.2252.1107964089.22381.python-list@python.org>
Message-ID: <1107965379.046718.248000@c13g2000cwb.googlegroups.com>

Benji,

I have used those very same fonts before and they work great, but I'm
trying to get away with using straight Python to accomplish this,
especially since the program will most likely be used on both Linux and
Windows. 

Josh



From cam.ac.uk at mh391.invalid  Fri Feb 25 09:26:40 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Fri, 25 Feb 2005 14:26:40 +0000
Subject: xhtml-print parser
In-Reply-To: <mailman.3045.1109339038.22381.python-list@python.org>
References: <1109333074.548547.171090@f14g2000cwb.googlegroups.com>	<cvn6f6$pdv$1@gemini.csx.cam.ac.uk>
	<mailman.3045.1109339038.22381.python-list@python.org>
Message-ID: <cvncj2$9rb$1@gemini.csx.cam.ac.uk>

Steve Holden wrote:

> Consider that the OP might want to pass the C parser output to a Python 
> web-content generator, which would make a deal of sense.

You're welcome to guess what the OP wants to do, but I'm not going to.
If he or she asks a coherent question it will probably be answered.
-- 
Michael Hoffman


From steven.bethard at gmail.com  Sun Feb 13 12:42:17 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 13 Feb 2005 10:42:17 -0700
Subject: changing __call__ on demand
In-Reply-To: <cuo0e1$4l2$1@lnx107.hrz.tu-darmstadt.de>
References: <cuo0e1$4l2$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <S6ydnSt9We_uDJLfRVn-iw@comcast.com>

Stefan Behnel wrote:
> Is there a way to change __call__ after class creation?

Check out this thread on the topic:

http://mail.python.org/pipermail/python-list/2004-January/203142.html

Basically, the answer is no -- at least not on a per-instance basis. 
You can try something like:

py> class Test(object):
...     def __new__(cls):
...         cls.__call__ = cls.call1
...         return object.__new__(cls)
...     def call1(self):
...         print 'call1'
...     def __call__(self):
...         print '__call__'
...
py> Test()()
call1

But then the call method is changed for all instances:

py> class Test(object):
...     instances = 0
...     def __new__(cls):
...         if cls.instances == 1:
...             print "setting __call__"
...             cls.__call__ = cls.call1
...         cls.instances += 1
...         return object.__new__(cls)
...     def call1(self):
...         print 'call1'
...     def __call__(self):
...         print '__call__'
...
py> t1 = Test()
py> t1()
__call__
py> t2 = Test()
setting __call__
py> t2()
call1
py> t1()
call1

Steve


From mfjacobs at gmail.com  Mon Feb 14 17:21:21 2005
From: mfjacobs at gmail.com (mfjacobs at gmail.com)
Date: 14 Feb 2005 14:21:21 -0800
Subject: Python 2.4 unable to find module.
Message-ID: <1108419681.177120.219300@c13g2000cwb.googlegroups.com>


Hello,
I was hoping someone here can help me with a problem I am having with
the PyXML extension ( ver 0.8.4) and Python 2.4
Thsi is a brand new build of Python.  Build with default .configre
options.

Python built and installed fine.  PyXML built and installed with no
complaining but, when I give the commands below it cannot find the
module.
Obviously Iam missing somehting.  Do you have any suggestions where to
look for "pathing", Security or permissions problems?

Thanks!

Python 2.4 (#1, Feb 14 2005, 12:27:33)
[GCC 3.2.2] on irix6
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> import sys
>>> from xml.dom.ext.reader import Sax2
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: No module named ext.reader
>>> ^D



From chrisks at NOSPAM.udel.edu  Mon Feb  7 19:14:03 2005
From: chrisks at NOSPAM.udel.edu (Chris S.)
Date: Tue, 08 Feb 2005 00:14:03 GMT
Subject: Memory Allocation?
In-Reply-To: <mailman.2056.1107770275.22381.python-list@python.org>
References: <8GCNd.9880$ya6.9761@trndny01>
	<mailman.2056.1107770275.22381.python-list@python.org>
Message-ID: <fvTNd.10378$ya6.7533@trndny01>

Gerrit Holl wrote:
> Chris S. wrote:
> 
>>Is it possible to determine how much memory is allocated by an arbitrary 
>>Python object? There doesn't seem to be anything in the docs about this, 
>>but considering that Python manages memory allocation, why would such a 
>>module be more difficult to design than say, the GC?
> 
> 
> Why do you want it?

It would seem desirable to know how the components of one's program 
occupies memory.


From tom at dtsam.com  Tue Feb  1 16:16:26 2005
From: tom at dtsam.com (Thomas Bartkus)
Date: Tue, 1 Feb 2005 15:16:26 -0600
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<uImdnUAKxbKaFWPcRVn-2A@telcove.net>
	<1107205410.367521.50490@f14g2000cwb.googlegroups.com>
	<44SdnUZGopnrAWLcRVn-pg@telcove.net>
	<1107275364.730411.24710@c13g2000cwb.googlegroups.com>
	<1grbjim.1pkh5toxl7g9dN%aleaxit@yahoo.com>
	<1107290630.115616.322680@z14g2000cwz.googlegroups.com>
Message-ID: <NLCdnUhyNdTjbGLcRVn-2A@telcove.net>

"Michael Tobis" <mt at 3planes.com> wrote in message
news:1107290630.115616.322680 at z14g2000cwz.googlegroups.com...
<snip>
> Since I'm very much a believer in Python as a beginner's language, that
> doesn't satisfy me. "Declarations are impractical" would satisfy me,
> but so far I'm not completely convinced of that.
>

As has been pointed out, it's not a big deal for a programmer who's been
there, done that. But the original posters example is a beginners trap for
certain.

*If* Python were a "beginners language", then it would be missing one of
it's training wheels.
Thomas Bartkus




From fredrik at pythonware.com  Mon Feb  7 18:24:18 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 00:24:18 +0100
Subject: "Collapsing" a list into a list of changes
References: <dvOMd.33656$EG1.19314@lakeread04><mailman.2034.1107725421.22381.python-list@python.org><cu7532$er8$01$1@news.t-online.com><200502071907.12169.francis.girard@free.fr><mailman.2097.1107802306.22381.python-list@python.org><cu8jlk$5v9$00$1@news.t-online.com><mailman.2109.1107809699.22381.python-list@python.org>
	<cu8ogo$t3o$01$1@news.t-online.com>
Message-ID: <cu8t83$tjn$1@sea.gmane.org>

Peter Otten wrote:

> *You* are cheating when you take a predefined function implemented in C
> (operator.mul) and then claim you are using pure Python.

operator is a standard module in Python.  if you have a desperate need
to be pointless in public, consider using another newsgroup.

</F> 





From follower at gmail.com  Thu Feb 24 19:35:52 2005
From: follower at gmail.com (Follower)
Date: 24 Feb 2005 16:35:52 -0800
Subject: searching pdf files for certain info
References: <cvfdgg$fr0$1@solaris.cc.vt.edu>
Message-ID: <3c18c08f.0502241635.5eb6bb61@posting.google.com>

rbt <rbt at athop1.ath.vt.edu> wrote in message news:<cvfdgg$fr0$1 at solaris.cc.vt.edu>...
> Not really a Python question... but here goes: Is there a way to read 
> the content of a PDF file and decode it with Python? I'd like to read 
> PDF's, decode them, and then search the data for certain strings.

I've had success with both:

  <http://www.boddie.org.uk/david/Projects/Python/pdftools/>

  <http://www.adaptive-enterprises.com.au/~d/software/pdffile/pdffile.py>

although my preference is for the latter as it transparently handles
decryption. (I've previously posted an enhancement to the `pdftools`
utility that adds decryption handling to it, but now use the `pdffile`
library as it handles it better.)

The ease of text extraction depends a lot on how the PDFs have been
created.

--Phil.


From oren at REMOVETHIS1.hishome.net  Mon Feb  7 14:45:28 2005
From: oren at REMOVETHIS1.hishome.net (Oren Tirosh)
Date: 7 Feb 2005 11:45:28 -0800
Subject: managing multiple subprocesses
References: <1107389416.531437.227160@l41g2000cwc.googlegroups.com>
Message-ID: <cf052f0d.0502071145.1c0c9ee@posting.google.com>

"Marcos" <seejadee at gmail.com> wrote in message news:<1107389416.531437.227160 at l41g2000cwc.googlegroups.com>...
> ...
> os.systems / commands etc etc. I realise the subprocess module may have
> what I need but I can't get python 2.4 on the Mac so I need a 2.3 based
> solution. Any help is much appreciated. Cheers.

The Python 2.4 subprocess module by Peter Astrand is pure python for
posix systems (a small C extension module is required only for win32
systems). You can bundle it with your code and use it with older
Python versions. It even contains backward compatibility code to
replace True and False if not found so it can run on Python 2.2.

  Oren


From sjmachin at lexicon.net  Mon Feb 14 07:26:53 2005
From: sjmachin at lexicon.net (John Machin)
Date: 14 Feb 2005 04:26:53 -0800
Subject: custom classes in sets
In-Reply-To: <mailman.2510.1108363259.22381.python-list@python.org>
References: <mailman.2510.1108363259.22381.python-list@python.org>
Message-ID: <1108384013.322546.176060@z14g2000cwz.googlegroups.com>


vegetax wrote:
> How can i make my custom class an element of a set?
>
> the idea is that it accepts file paths and construct a set of unique
> files (the command "cmp" compares files byte by byte.),the files can
> have different paths but the same content
>

Q: How do I transport ten sumo wrestlers on a unicycle?

A: With extreme difficulty. You may well need a different vehicle.

Think about your requirements, then implement the most appropriate data
structure. If, as is likely, you need to know which and how many files
are identical, then a set won't do the job by itself. You may need a
union-find gadget.

Then before you rush and implement something, google around and look in
the Tools and Scripts directories in the Python distribution; I'm quite
sure I've seen something like a "duplicate file detector" written in
Python somewhere.

HTH,
John



From ptmcg at austin.rr.com  Mon Feb 28 01:07:01 2005
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 27 Feb 2005 22:07:01 -0800
Subject: parse lines to name value pairs
In-Reply-To: <1109552988.837466.23940@g14g2000cwa.googlegroups.com>
References: <94c18f5a4bd6cad273a40299b1b137e8@localhost.talkaboutprogramming.com>
	<1109552988.837466.23940@g14g2000cwa.googlegroups.com>
Message-ID: <1109570821.339302.174970@f14g2000cwb.googlegroups.com>

Damned cut-and-paste in GoogleGroups edit window (leading '.'s are to
retain spacing):

.# get pyparsing at http://pyparsing.sourceforge.net
.
.from pyparsing import quotedString, printables, Word, OneOrMore,
Forward, Literal,delimitedList,Group
.
.line1 = """path {{data/tom} C:/user/john}"""
.line2 = """books{{book music red} {book {math 1} blue} {book {tom's
book} green}}"""
.
.lbrace = Literal("{").suppress()
.rbrace = Literal("}").suppress()
.listDef = Forward()
.
.nonbracechars = "".join([ c for c in printables if c not in "{}"])
.
.# add more things to listItem, such as integers, etc. if your list has
other than quoted strings
.listItem = OneOrMore(Word(nonbracechars)) | quotedString | listDef
.
.print "With grouping"
.listDef << lbrace + Group( OneOrMore(listItem) ) + rbrace
.lineDef = Word(nonbracechars) + Group(listDef)
.
.for testdata in (line1, line2):
.    print lineDef.parseString(testdata).asList()
.
.print
.
.print "Without grouping"
.listDef << lbrace + ( OneOrMore(listItem) ) + rbrace
.lineDef = Word(nonbracechars) + Group(listDef)
.
.for testdata in (line1, line2):
.    print lineDef.parseString(testdata).asList()
.

Gives this output:

With grouping
['path', [[['data/tom'], 'C:/user/john']]]
['books', [[['book', 'music', 'red'], ['book', ['math', '1'], 'blue'],
['book', ["tom's", 'book'], 'green']]]]

Without grouping
['path', ['data/tom', 'C:/user/john']]
['books', ['book', 'music', 'red', 'book', 'math', '1', 'blue', 'book',
"tom's", 'book', 'green']]



From ilias at lazaridis.com  Mon Feb 14 06:57:02 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Mon, 14 Feb 2005 13:57:02 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cuo71l$gig$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
Message-ID: <4210920E.80103@lazaridis.com>

Hello,

there is a thread in comp.lang.python, and a poster suggested that I ask
you directly.

possibly you can answer the question c), at least from your side.

Did you ever try to submit the patches to the main-source-code base of 
python?

Thank you for your pyMinGW work and your time.

-

Ilias Lazaridis wrote:
> I'm a newcomer to python:
> 
> [EVALUATION] - E01: The Java Failure - May Python Helps? 
> http://groups-beta.google.com/group/comp.lang.python/msg/75f0c5c35374f553
> 
> 
> -
> 
> I've download (as suggested) the python 2.4 installer for windows.
> 
> Now I have problems to compile python extension that some packages 
> depend on.
> 
> I use the MinGW open-source compiler.
> 
> -
> 
> My questions:
> 
> a) Why does the Python Foundation not provide additionally a binary 
> version, compiled with MinGW or another open-source compiler?
> 
> b) Why does the Python Foundation not ensure, that the python 
> source-code is directly compilable with MinGW?
> 
> c) Why are the following efforts not _directly_ included in the
> python source code base?
> 
> http://jove.prohosting.com/iwave/ipython/pyMinGW.html
> 
> above link found in this thread:
> 
> http://groups-beta.google.com/group/comp.lang.python/msg/c9f0444c467de525
> 
> 
> d) Is it really neccessary that I dive into such adventures, to be
> able to do the most natural thing like: "developing python extensions
> with MinGW"?
> 
> http://starship.python.net/crew/kernr/mingw32/Notes.html
> 
> e) Is there any official statement available regarding the
> msvcr71.dll and other MS licensing issues?
> 
> [see several threads "[Python-Dev] Is msvcr71.dll
> re-redistributable?"]
> 
> http://mail.python.org/pipermail/python-dev/2005-February/thread.html
> 
> 
> f) Are there any official (Python Foundation) statements / rationales
>  available, which explain why the MinGW compiler is unsupported,
> although parts of the community obviously like to use it?
> 
> http://groups-beta.google.com/group/comp.lang.python/msg/dc3474e6c8053336
> 
> 
> -
> 
> I just want to understand.
> 
> Thankfull for any pointer to official documents / statements.
> 
> [google is _not_ a fried here. I like to have a stable development 
> environment, which is supported by the official projects, thus it can
>  pass quality-assurance without beeing afraid about every next
> release.]

.

-- 
http://lazaridis.com


From jeff at ccvcorp.com  Thu Feb 17 15:40:59 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Thu, 17 Feb 2005 12:40:59 -0800
Subject: How to wrap a class's methods?
In-Reply-To: <Hv-dnZ4dh7oHa4nfRVn-qA@comcast.com>
References: <4214f167$0$44618$a1866201@visi.com>
	<Hv-dnZ4dh7oHa4nfRVn-qA@comcast.com>
Message-ID: <111a08n16gu9bb0@corp.supernews.com>

Steven Bethard wrote:

> Grant Edwards wrote:
> 
>> I want to subclass an IMAP connection so that most of the
>> methods raise an exception if the returned status isn't 'OK'.
>> This works, but there's got to be a way to do it that doesn't
>> involve so much duplication:
>>
>> class MyImap4_ssl(imaplib.IMAP4_SSL):
>>
>>     def login(*args):
>>         s,r = imaplib.IMAP4_SSL.login(*args)
>>         if s!='OK':
>>             raise NotOK((s,r))
>>         return r
>>             def list(*args):
>>         s,r = imaplib.IMAP4_SSL.list(*args)
>>         if s!='OK':
>>             raise NotOK((s,r))
>>         return r
>>             def search(*args):
>>         s,r = imaplib.IMAP4_SSL.search(*args)
>>         if s!='OK':
>>             raise NotOK((s,r))
>>         return r
>>             [and so on for another dozen methods]
> 
> 
> You could try something like (Untested!):
> 
> class Wrapper(object):
>     def __init__(self, func):
>         self.func = func
>     def __call__(*args, **kwargs):
>         self, args = args[0], args[1:]
>         s, r = self.func(*args)
>         if s != 'OK':
>             raise NotOK((s, r))
>         return r
> 
> for func_name in ['login', 'list', 'search']:
>     func = Wrapper(getattr(imaplib.IMAP4_SSL, func_name))
>     setattr(imaplib.IMAP4_SSL, func_name, func)

You could probably also do this as a factory function, rather than as 
a class (also untested!):

def Wrapper(func):
     def wrapped(self, *args, **kwargs):
         s, r = func(self, *args, **kwargs)
         if s != 'OK':
             raise NotOK((s,r))
         return r
     return wrapped

I believe that this will be semantically almost equivalent, but 
conceptually slightly simpler.

Jeff Shannon




From bvande at po-box.mcgill.ca  Mon Feb  7 12:10:28 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Mon, 07 Feb 2005 12:10:28 -0500
Subject: Unable to run IDLE Under Windows
In-Reply-To: <cu7t51$cic$02$1@news.t-online.com>
References: <060220052259038640%eq_fidget@mac.com>
	<cu7t51$cic$02$1@news.t-online.com>
Message-ID: <4207A104.8030605@po-box.mcgill.ca>

Peter Otten said unto the world upon 2005-02-07 09:14:
> Jonathan Polley wrote:
> 
> 
>>I have one account on a WindowsXP machine that refuses to run IDLE (or
>>any other python script that uses Tk).  Other people can login to that
>>PC and IDLE runs just fine, so it is not an installation issue.  When
>>the person who has the problem logs into another PC the problem follows
>>them.  Any ideas as to what might me wrong?
> 
> 
> Perhaps your configuration files contain bad data:
> 
> """
> # IDLE reads several config files to determine user preferences.  This
> # file is the default config file for general idle settings.

<SNIP details of config filenames and purposes>
> 
> Peter

Thanks for posting that, Peter. It helped me work out my problem that 
I posted about a few days back <http://tinyurl.com/3s7gn>.

Could I ask where did you get the content from? I've searched my HDD 
for some of the contained phrases with the Windows tools I have at my 
disposal, but didn't manage to find the text you posted. (If I'd been 
able to find it, I'd have been able to solve my problem days ago.)

Thanks and best,

Brian vdB



From tundra at tundraware.com  Wed Feb  2 18:16:16 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 02 Feb 2005 18:16:16 EST
Subject: Generating .pyc/.pyo from a make file
In-Reply-To: <42015a85_1@news.arcor-ip.de>
References: <4308d2-0801.ln1@eskimo.tundraware.com>
	<42015a85_1@news.arcor-ip.de>
Message-ID: <dh38d2-at71.ln1@eskimo.tundraware.com>

Roland Heiber wrote:

> Tim Daneliuk wrote:
> 
>> I use a makefile to create distribution tarballs of freestanding Python
>> programs and their documentation.  I cannot seem to find the right
>> command line option to just generate a pyc/pyo file from the program
>> and then exit.  If I use 'python -OOOO -c"import myprog"' it creates
>> the pyo file, but myprog starts up and keeps running.
>>
>> IOW, I need a batch method for generating compiled python.  I know it
>> exists, but I can't find it for some reason ...
>>
>> TIA,
> 
> Hi,
> 
> take a look at http://docs.python.org/lib/module-compileall.html
> 
> HtH, Roland

It does - thanks.  One more question:  Are pyc and pyo file portable
across operating systems?  I suspect not since I generated a pyo
on a FreeBSD machine that will not run on a Win32 machine.  I was
under the impression that "compiled" meant optimized byte code that
was portable across implementations, but it looks to not be the case...

-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From steven.bethard at gmail.com  Mon Feb 21 14:10:26 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 21 Feb 2005 12:10:26 -0700
Subject: Test for structure
In-Reply-To: <1109012415.692798.185750@l41g2000cwc.googlegroups.com>
References: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
	<mailman.2824.1108792560.22381.python-list@python.org>
	<1108937287.079367.276910@g14g2000cwa.googlegroups.com>
	<HIqdnYQVyeBCjYTfRVn-oQ@comcast.com>
	<1109012415.692798.185750@l41g2000cwc.googlegroups.com>
Message-ID: <X-qdnXWyq9aDr4ffRVn-tg@comcast.com>

Martin Miller broke the order of reading again by top-posting:
> However, to handle the more general problem of allow *any* argument to
> be either a single item or a list seems to require a combination of
> both EAPF and LBYL. This is the best solution I've been able to come up
> with so far:
> 
> def asList(arg):
[snip]
>     if arg is None:
>         return []
>     elif isinstance(arg, basestring): # special case strings (to
>                                       # avoid list(<string>))
>         return [arg]
>     else:
>         try:
>             return list(arg)
>         except TypeError:
>             return [arg]
>
[snip]
> Can this be improved or is there anything wrong or overly limiting
> about it?

I don't think you're going to do a whole lot better than that, though 
you can try something like the following if you're really afraid of the 
isinstance:

def aslist(arg):
     # you don't need to test None; it will be caught by the list branch
     try:
         arg + ''
     except TypeError:
         return [arg]
     try:
         return list(arg)
     except TypeError:
         return [arg]

That said, I find that in most cases, the better option is to use *args 
in the original function though.  For example:

     def f(arg):
         args = aslist(arg)
         ...
     f(42)
     f(['spam', 'eggs', 'ham'])

could probably be more easily written as:

     def f(*args):
         ...
     f(42)
     f('spam', 'eggs', 'ham')

Of course this won't work if you have multiple list arguments.

STeVe


From sjmachin at lexicon.net  Sat Feb 26 05:28:26 2005
From: sjmachin at lexicon.net (John Machin)
Date: 26 Feb 2005 02:28:26 -0800
Subject: error: db type could not be determined
In-Reply-To: <1109407276.520167.190630@f14g2000cwb.googlegroups.com>
References: <1109407276.520167.190630@f14g2000cwb.googlegroups.com>
Message-ID: <1109413706.437205.286070@o13g2000cwo.googlegroups.com>


neutrinman at myrealbox.com wrote:
> why does the following error occur?

I don't know; I've never used the shelve module. Let's see what as two
utter n00bz we can find out. Let's check out where it clagged:
lib\anydbm.py, line 80, in open ...

Hmm, reading backwards a little, looks like it called whichdb.whichdb
to nut out what sort of database it was, and whichdb reported back that
it was an existing file, of unknown type. Flicking through whichdb.py
confirms this.

Let's see if we can reproduce that:

=== step 1: file doesn't exist ===
C:\junk>c:\python23\python
Python 2.3.4 (#53, May 25 2004, 21:17:02) [MSC v.1200 32 bit (Intel)]
on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import shelve
>>> df = shelve.open('mydata.dat', 'c')
>>> ^Z

C:\junk>dir mydata.dat
[snip]
26/02/2005  08:40p              24,576 mydata.dat

=== looks like file created OK ==

C:\junk>del mydata.dat
C:\junk>copy con mydata.dat
any old codswallop
^Z
        1 file(s) copied.

=== OK, now mydata.dat is trash.

C:\junk>c:\python23\python
Python 2.3.4 (#53, May 25 2004, 21:17:02) [MSC v.1200 32 bit (Intel)]
on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import shelve
>>> df = shelve.open('mydata.dat', 'c')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "c:\python23\lib\shelve.py", line 231, in open
    return DbfilenameShelf(filename, flag, protocol, writeback, binary)
  File "c:\python23\lib\shelve.py", line 212, in __init__
    Shelf.__init__(self, anydbm.open(filename, flag), protocol,
writeback, binary)
  File "c:\python23\lib\anydbm.py", line 80, in open
    raise error, "db type could not be determined"
anydbm.error: db type could not be determined
>>>

Uh-huh.

By the way, it's probably not a good idea to use a ".dat" extension;
evidently (read whichdb.py for the gory details) some of the dbms add
an extension to the supplied name. One of them uses ".dat". Could
become a source of confusion.

Take a hint: they say "Google is your friend", but better still is the
source in lib\*.py -- it's quite legible, you don't need an Internet
connection, and there sure ain't no ads in the margin. And don't just
open it in emergencies: pick a module that covers a topic that
interests you and just read it. You'll see good coding style, good ways
of doing things, wise utterances by the timbot, ...

HTH,
John



From robin at SPAMREMOVEjessikat.fsnet.co.uk  Sat Feb 19 07:29:07 2005
From: robin at SPAMREMOVEjessikat.fsnet.co.uk (Robin Becker)
Date: Sat, 19 Feb 2005 12:29:07 +0000
Subject: [ANN] Python 2.4 Quick Reference available
In-Reply-To: <cv79sj$mgk$1@aphrodite.grec.isp.9tel.net>
References: <cv79sj$mgk$1@aphrodite.grec.isp.9tel.net>
Message-ID: <42173113.30302@jessikat.fsnet.co.uk>

Richard Gruet wrote:
> Hi Pythoners,
> 
> An updated version of the Python Quick Reference is available for Python 2.4
> at http://rgruet.free.fr/#QuickRef.
> It is a single looonnng html page (30 printed A4 pages) with a choice of 4
> different CSS styles; also available in PDF.
> 
> Richard
> 
> 
Great news; thanks and thanks again
-- 
Robin Becker


From john at grulic.org.ar  Sat Feb 19 02:22:56 2005
From: john at grulic.org.ar (John Lenton)
Date: Sat, 19 Feb 2005 04:22:56 -0300
Subject: exercise: partition a list by equivalence
In-Reply-To: <1108792679.403090.220050@o13g2000cwo.googlegroups.com>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<mailman.2803.1108743668.22381.python-list@python.org>
	<1108768870.455974.244590@c13g2000cwb.googlegroups.com>
	<mailman.2819.1108771744.22381.python-list@python.org>
	<1108774366.122896.293720@l41g2000cwc.googlegroups.com>
	<mailman.2822.1108782900.22381.python-list@python.org>
	<1108792679.403090.220050@o13g2000cwo.googlegroups.com>
Message-ID: <20050219072256.GA30221@grulic.org.ar>

On Fri, Feb 18, 2005 at 09:57:59PM -0800, John Machin wrote:
> >
> > this, together with you saying that it is hard to explain, makes me
> > think that you aren't comfortable thinking of lists as mutable
> > objects.
> 
> How so? There is no connection between is/== and mutability. Let me
> amplify: The point about 'is' is a good one, and aids your redemption
> after your failure to have adequate guards caused your algorithm not to
> work.

hey, it worked for all the test cases provided by the customer! :) and
then some; I hadn't thought of checking for cycles nor repetetitions.

>[snip]
> 
> You are confusing mutability of lists (without which they would be
> called tuples!) with my point that the 'res' list was having its
> contents fiddled with implicitly through other "pointers".

umm... nope, see, well, hair-splitting and all that, there is this
list that holds the partitions; the partitions are lists of
elements. There is a reverse mapping that, for each element, holds the
partition that element is in. So basically you go down the list of
pairings, modifying the partitions as you go. I'm certain if I had
commented the function appropriately, we wouldn't be having this
discussion :)

Let me see if I can remedy that:

def merge(pairings):
    """
    merge(pairings) takes a list of pairs, each pair indicates
    the sameness of the two indexes. Returns a partitioned list
    of same indexes.

    For example, if the input is
    merge( [ [1,2], [2,4], [5,6] ] );

    that means 1 and 2 are the same. 2 and 4 are the
    same. Therefore 1==2==4. The result returned is

    [[4,2,1],[6,5]];

    (ordering of the returned list and sublists are not
    specified.)
    """

    # the list of partitions, or partitioned list.
    #  (each partition is a list of elements)
    res = []

    # reverse mapping (element -> partition it is in)
    rev = {}
    for pairing in pairings:
        first, second = pairing
        has_first = first in rev
        has_second = second in rev
        if has_first and has_second:
            # both elements already in a partition...
            if rev[first] is rev[second]:
                # both elements in same partition, nothing to do
                continue
            # joining the two partitions:
            #  - grow one partition with the other one
            rev[first].extend(rev[second])
            #  - clear the other one
            rev[second][:] = []
            #  update reverse mapping
            rev[second] = rev[first]
        elif has_first:
            # partition already exists, just add an element to it
            rev[first].append(second)
            # update reverse mapping
            rev[second] = rev[first]
        elif has_second:
            # ditto
            rev[second].append(first)
            rev[first] = rev[second]
        else:
            # create partition from scratch
            if first == second:
                new = [first]
            else:
                new = [first, second]
            # add it to list of partitions
            res.append(new)
            # update reverse mapping
            rev[first] = rev[second] = new
    # remove empty partitions
    return filter(None, res)

hrmph, I should hit the sack. Sorry if this is still ugly, I'm too
tired to tell.

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
Todo bicho que camina va a parar cuando se canse.
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From ncoghlan at iinet.net.au  Sun Feb 20 09:17:02 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Mon, 21 Feb 2005 00:17:02 +1000
Subject: unicode encoding usablilty problem
In-Reply-To: <42189825.9090506@v.loewis.de>
References: <opsmekm2ei6yt6e7@news.cisco.com>	<42164d01$0$4676$9b622d9e@news.freenet.de>	<opsme4lcjo6yt6e7@news.cisco.com>	<42186016.7030309@v.loewis.de>
	<mailman.2857.1108901156.22381.python-list@python.org>
	<42189825.9090506@v.loewis.de>
Message-ID: <42189BDE.3030406@iinet.net.au>

Martin v. L?wis wrote:
> People also argue that with such an approach, we could as well
> tell users to use array.array for the mutable type. But then,
> people complain that it doesn't have all the library support that
> strings have.

Indeed - I've got a data manipulating program that I figured I could make 
slightly less memory hungry by using arrays instead of strings.

I discovered very quickly just how inconvenient such a change would be in terms 
of the available API for manipulation of the byte array (the loss of 'join' 
support was a serious drawback). The program still uses strings for that reason.

However, I wonder if that might not be better solved by providing an 
"array.bytearray" that supported relevant portions of the string API (and easy 
conversion to a string), rather than blurring the concept of immutable strings.

Hmm - something else the PEP needs to discuss: What happens to __str__ and 
__unicode__? Is there a new __bytes__ slot?

I wonder if Skip is still up for championing this one. . .

Cheers,
Nick.
One PEP's enough for me (even though 338 doesn't seem to generate much interest)

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From bpeng at rice.edu  Sat Feb  5 15:57:51 2005
From: bpeng at rice.edu (Bo Peng)
Date: Sat, 05 Feb 2005 14:57:51 -0600
Subject: changing local namespace of a function
In-Reply-To: <4204eba4$1_2@newspeer2.tds.net>
References: <cu0lru$8ik$1@joe.rice.edu> <4204eba4$1_2@newspeer2.tds.net>
Message-ID: <cu3c0f$g13$1@joe.rice.edu>

Kent Johnson wrote:
> You can part way there using keyword arguments. You just have to use 
> dictionary syntax for changing values in the dictionary:
> 
>  >>> def f(d, x=None, y=None):
>  ...   d['z'] = x + y
>  ...
>  >>> a = {'x':1, 'y':2}
>  >>> b = {'x':3, 'y':3}
>  >>>
>  >>> f(a, **a)
>  >>> a
> {'y': 2, 'x': 1, 'z': 3}
>  >>> f(b, **b)
>  >>> b
> {'y': 3, 'x': 3, 'z': 6}
> 

This is not possible in my case since my dictionary have many more items 
than just x and y. So, if there is are other items in the dictionary

 >>> a = {'x':1, 'y':2, 'else':4}
 >>> f(a,**a)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "/usr/tmp/python-10176RtT.py", line 1, in ?
     f(a,**a)
TypeError: f() got an unexpected keyword argument 'else'

Bo


From phil at riverbankcomputing.co.uk  Sun Feb 20 04:32:40 2005
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Sun, 20 Feb 2005 09:32:40 +0000
Subject: PyQt Python Bindings for Qt v3.14 Released
Message-ID: <200502200932.40711.phil@riverbankcomputing.co.uk>

Riverbank Computing is pleased to announce the release of PyQt v3.14 available 
from http://www.riverbankcomputing.co.uk/.

Changes since the last release include support for QScintilla v1.5.

PyQt is a comprehensive set of Qt bindings for the Python programming language 
and supports the same platforms as Qt.  Like Qt, PyQt is available under the 
GPL (for UNIX, Linux and MacOS/X), a commercial license (for Windows, UNIX, 
Linux and MacOS/X) and a free educational license (for Windows).

PyQt is implemented as a set of 9 extension modules containing 300 classes and 
over 5,750 functions and methods.

PyQt also includes bindings to QScintilla, the port to Qt of the Scintilla 
editor component.

PyQt can be used either as a rapid prototyping tool, or as an alternative to 
C++ for developing large Qt applications.

PyQt includes the pyuic utility which generates Python code to implement user 
interfaces created with Qt Designer in the same way that the uic utility 
generates C++ code.

Third party tools are also available - such as eric3, a comprehensive IDE 
(including an editor, debugger, class browser, integration with Qt Designer, 
re-factoring tools, unit testing tools and integration with source code 
control systems).  eric3 is written entirely using PyQt and is available from 
http://www.die-offenbachs.de/detlev/eric3.html.


From dodysw at gmail.com  Tue Feb  8 01:01:52 2005
From: dodysw at gmail.com (dody suria wijaya)
Date: Tue, 8 Feb 2005 13:01:52 +0700
Subject: Get importer module from imported module
In-Reply-To: <222875600.20050208120102@asp.co.id>
References: <mailman.2058.1107773305.22381.python-list@python.org>
	<Xns95F67153AE259duncanrcpcouk@127.0.0.1>
	<mailman.2062.1107776648.22381.python-list@python.org>
	<Xns95F67CB7E70AEduncanrcpcouk@127.0.0.1>
	<222875600.20050208120102@asp.co.id>
Message-ID: <1276838560.20050208130152@asp.co.id>

dsw> New problem though. On line:
dsw> newclass = new.classobj(classname + '_' + food, (mixin, main), {})
dsw> received "TypeError: metaclass conflict: the metaclass of a
dsw> derived class must be a (non-strict) subclass of the
dsw> metaclasses of all its bases".

Oops, goofed up on me. The above "main" had mistakenly
pointed to the module. main.Main did the trick.

-- dsw



From mhartl at post.harvard.edu  Mon Feb 28 17:15:34 2005
From: mhartl at post.harvard.edu (Michael Hartl)
Date: 28 Feb 2005 14:15:34 -0800
Subject: Calling external text-files (newb)
In-Reply-To: <mailman.3154.1109628053.22381.python-list@python.org>
References: <mailman.3154.1109628053.22381.python-list@python.org>
Message-ID: <1109628934.265045.131500@l41g2000cwc.googlegroups.com>

There are two problems: (1) by quoting 'source', you refer to a string
literal, not the variable you defined via raw_input; (2) you have not
defined the variable 'input', so there's no way to call the 'read'
method on it.

Try this instead:

source_path = raw_input('file path: ')
s = open(source_path).read()
print s

The default behavior of 'open' includes 'r' implicitly.

You can also use the function 'file', which is a synonym for 'open':

s = file(source).read()

Be warned that using the same syntax when writing files is dangerous;
in that case you should create a file object and explicitly close it.

f = file('a_copy', 'w')
f.write(s)
f.close()

HTH,

Michael

--
Michael D. Hartl, Ph.D.
CTO, Quark Sports LLC
http://quarksports.com/



From timr at probo.com  Sun Feb 27 02:27:48 2005
From: timr at probo.com (Tim Roberts)
Date: Sat, 26 Feb 2005 23:27:48 -0800
Subject: cgi: getting at raw POST data?
References: <421fbaf9$1@nntp.zianet.com>
Message-ID: <tet22190o59vsm4eh2vmdpjsq3nvrj1i5t@4ax.com>

"Erik Johnson" <nobody at anywhere dot com> wrote:
>
>I am trying to work with a program that is trying make an HTTP POST of text
>data without any named form parameter. (I don't know - is that a normal
>thing to do?) I need to write a CGI program that accepts and processes that
>data. I'm not seeing how to get at data that's not a named form parameter.

If you are using POST in some non-standard way, just skip using the cgi
module at all and read stdin yourself.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From python at hope.cz  Wed Feb 16 09:09:09 2005
From: python at hope.cz (Lad)
Date: 16 Feb 2005 06:09:09 -0800
Subject: MYSQL - how to install ?
In-Reply-To: <1108556905.444394.210020@l41g2000cwc.googlegroups.com>
References: <1108547199.260223.211450@f14g2000cwb.googlegroups.com>
	<1108556905.444394.210020@l41g2000cwc.googlegroups.com>
Message-ID: <1108562949.825258.297260@f14g2000cwb.googlegroups.com>

I am sorry it was my fault I did not say that clearly.
 I do not have a problem to install MySQL  server but I do not know how
to install MySQLdb module on my windowsXP so that I can work  with
MySQL server via Python 2.3.
Thanks for help
Lad



From steven.bethard at gmail.com  Sun Feb  6 17:43:04 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 06 Feb 2005 15:43:04 -0700
Subject: empty classes as c structs?
In-Reply-To: <1grl4od.1niw3nhvo753cN%aleaxit@yahoo.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>
	<mailman.1973.1107618702.22381.python-list@python.org>
	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>
	<mailman.2006.1107658273.22381.python-list@python.org>
	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>
	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>
	<4qCdnXM11-uVGJvfRVn-vQ@comcast.com>
	<1grl4od.1niw3nhvo753cN%aleaxit@yahoo.com>
Message-ID: <OJ6dnbavcfTpAJvfRVn-ow@comcast.com>

Alex Martelli wrote:
> Steven Bethard <steven.bethard at gmail.com> wrote:
>>I don't know what the right solution is here...  I wonder if I should
>>write a classmethod-style descriptor that disallows the calling of a 
>>function from an instance?  Or maybe I should just document that the 
>>classmethods should only be called from the class?  Hmm...
> 
> 
> Another approach is to add a few "reserved words" to the ones Python
> itself would reject in the initialization.  Just you cannot do:
> 
>     b = Bunch(continue=23)
> 
> you may choose to forbid using getDict=42 - if you do that you probably
> want to forbid any magicname too, since e.g.
> 
>     b = Bunch(__dict__=99)
> 
> can't work ``right'' no matter what, while setting e.g. __deepcopy__
> similarly might confuse any copy.deepcopy(b), etc, etc.

Yeah, I thought about this.  I certainly don't have any problem with 
disallowing magic names.  For other names, I'm less certain...

>>How do you feel about getDict and setDict also being classmethods?
> 
> Uh?  I want to get or set the dict of a specific instance -- not those
> of the whole class.  How would you design them as classmethods...?

The classmethod would have to be called with an instance, e.g.:

class Bunch(object):
     @classmethod
     def getDict(cls, self):
         return self.__dict__

     @classmethod
     def setDict(cls, self, dct):
         self.__dict__ = dct

Of course, these could be staticmethods instead since they don't need 
the class, but the point is that you should be calling them like:

     adict = Bunch.getDict(bunch)

or

     Bunch.setDict(bunch, adict)

The complications with attribute hiding is one of main reasons I've 
tried to minimize the number of methods associated with Bunch...

Steve


From aleaxit at yahoo.com  Tue Feb  8 05:44:10 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Tue, 8 Feb 2005 11:44:10 +0100
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<cu8h8k$md4$1@sea.gmane.org> <4207D64F.2000709@optushome.com.au>
	<mailman.2118.1107818151.22381.python-list@python.org>
	<mailman.2123.1107820051.22381.python-list@python.org>
	<4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com>
	<cu95nd$7cr$1@news1.ucsd.edu>
	<6h7g0113up1v76k7qkad7bt17os1q73510@4ax.com>
	<mailman.2135.1107829480.22381.python-list@python.org>
	<e0ag011atnlt5b00klicjol93c7j8fe341@4ax.com>
	<c1rg0110sqmiqm28ka301bj9a506rdfoqt@4ax.com>
Message-ID: <1grnxs8.1y1tcqq1d0o2bsN%aleaxit@yahoo.com>

Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:

> hassle to code, but if your application could dynamically select from
> whatever toolkit is available on the machine, you (and I should emphasis
> that this is an impersonal/generic "you" I reference) might be able to
> argue an exemption from the QT license.

So maybe it's time to resurrect anygui, maybe in a simplified version
which can only interface to, say, PyQt or Tkinter -- 'eithergui' maybe.


Alex


From ncoghlan at iinet.net.au  Sat Feb  5 03:56:48 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 05 Feb 2005 18:56:48 +1000
Subject: changing local namespace of a function
In-Reply-To: <cu1l9o$3oq$1@joe.rice.edu>
References: <cu0lru$8ik$1@joe.rice.edu>	<cu0sj5$sfk$1@sea.gmane.org>	<4204400C.5060608@iinet.net.au>	<mailman.1948.1107575575.22381.python-list@python.org>
	<cu1l9o$3oq$1@joe.rice.edu>
Message-ID: <42048A50.9000709@iinet.net.au>

Bo Peng wrote:
> I guess I will go with solution 3. It is evil but it is most close to my 
> original intention. It leads to most readable code (except for the first 
> line to do the magic and the last line to return result) and fastest 
> performance.

Thousands of programs use Python's class attribute access syntax day-in and 
day-out and find the performance to be acceptable.

Premature optimization is the root of much evil - the exec + locals() hack if 
very dependent on the exact Python version you are using. Expect some hard to 
find bugs if you actually use the hack.

And code which relies on an evil hack in order to have the desired effect 
doesn't count as readable in my book - I would be very surprised if many people 
reading your code knew that updates to locals() can sometimes be made to work by 
performing them inside a bare exec statement.

> Thank again for everyone's help. I have learned a lot from the posts, 
> especially the wrapdict class.

It sounds like the dictionaries you are working with actually have some 
meaningful content that you want to manipulate.

I'd seriously suggest creating a class which is able to extract the relevant 
data from the dictionaries, supports the desired manipulations, and then be 
instructed to update the original dictionaries.

For example, an approach based on Michael's dictionary wrapper class

class DataAccessor(object):
   # Just a different name for Michael's "wrapbigdict"
   def __init__(self, data):
     object.__setattr__(self, "_data", data)
   def __getattr__(self, attrname):
     return self._data[attrname]
   def __setattr__(self, attrname, value):
     self._data[attrname] = value

class DataManipulator(DataAccessor):
   def __init__(self, data):
     DataAccessor.__init__(self, data)
   def calc_z(self):
     self.z = self.x + self.y

In action:

Py> data = DataManipulator(dict(x=1, y=2))
Py> data.z
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "<stdin>", line 6, in __getattr__
KeyError: 'z'
Py> data.calc_z()
Py> data.z
3
Py> data._data
{'y': 2, 'x': 1, 'z': 3}

The class based approach also gives you access to properties, which can be used 
to make that first call to 'z' automatically calculate the desired result 
instead of giving a KeyError:

class EnhancedDataManipulator(DataAccessor):
   def __init__(self, data):
     DataAccessor.__init__(self, data)

   class _utils(object):

     @staticmethod
     def make_prop(name, calculator):
       def get(self, _name=name, _calculator=calculator):
         try:
           return self._data[_name]
         except KeyError:
           val = _calculator(self)
           self._data[_name] = val
           return val
       def set(self, val, _name=name):
         self._data[_name] = val
       def delete(self, _name=name):
         del self._data[_name]
       return property(get, set, delete)

     @staticmethod
     def calc_z(self):
       return self.x + self.y

   z = _utils.make_prop('z', _utils.calc_z)

Note the nested _utils class isn't strictly necessary. I just like to use it to 
separate out the information which the class uses to construct itself from those 
which are provided to clients of the class.

Anyway, the enhanced version in action:

Py> data = EnhancedDataManipulator(dict(x=1,y=2))
Py> data.x
1
Py> data.y
2
Py> data.z
3
Py> data.x = 30
Py> data.z
3
Py> data.z = 10
Py> data.z
10
Py> del data.z
Py> data.z
32

If you want to add more calculated properties to the data manipulator, simply 
define additional calculator methods, and define the attribute with make_prop.

Use a class. Giving meaningful form to a collection of attributes is what 
they're for, and Python provides many features designed to make that process easier.

Trying to fake it with function namespaces is just going to make trouble for you 
in the future.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From cam.ac.uk at mh391.invalid  Thu Feb 17 04:53:12 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Thu, 17 Feb 2005 09:53:12 +0000
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <421467ca$0$295$edfadb0f@dread12.news.tele.dk>
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<37hqlrF59l2b2U1@individual.net>
	<873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<slrnd18lvg.9ng.nick@irishsea.home.craig-wood.com>
	<421467ca$0$295$edfadb0f@dread12.news.tele.dk>
Message-ID: <cv1pic$hct$2@gemini.csx.cam.ac.uk>

Max M wrote:

>  >>> ','.join(map(str, l))
> '1,2,3,four'
> 
> Is this really that hard to do, that you want it in the library?

I think it's a sufficiently common use case that having to do that
is a wart.
-- 
Michael Hoffman


From http  Mon Feb 14 20:10:17 2005
From: http (Paul Rubin)
Date: 14 Feb 2005 17:10:17 -0800
Subject: is there a safe marshaler?
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<1108051828.483222.62670@z14g2000cwz.googlegroups.com>
	<7xmzu6q4cv.fsf@ruckus.brouhaha.com>
	<4211185b$0$28982$e4fe514c@news.xs4all.nl>
	<7xbramzt1c.fsf@ruckus.brouhaha.com>
	<42112b1e$0$28978$e4fe514c@news.xs4all.nl>
	<7xacq6sqej.fsf@ruckus.brouhaha.com>
	<421130ae$0$28984$e4fe514c@news.xs4all.nl>
	<7x3bvyiuin.fsf@ruckus.brouhaha.com>
	<42113b3b$0$28991$e4fe514c@news.xs4all.nl>
	<7xbramejkc.fsf@ruckus.brouhaha.com>
	<42114a75$0$28989$e4fe514c@news.xs4all.nl>
Message-ID: <7xsm3y7hmu.fsf@ruckus.brouhaha.com>

Irmen de Jong <irmen.NOSPAM at xs4all.nl> writes:
> I know a bit about this stuff, but not nearly enough to come
> up with a water tight design by myself, so it's much easier
> and safer to rely on trusted work by others.

Yeah, at this point I think it's safest to just use SSL.  If I use
Pyro for anything I'll probably do it that way.

> DCOM: as it is based on DCE/RPC, I would say: no. There's this MIDL
> thing sitting in between and stuff like that. There's no such thing
> as a specific class id and/or method name and/or parameter list that
> directly maps onto an object.method in the programming environment.

Hmm, ok, maybe we need something like that for Python, perhaps as a
Pyro extension.

> Precisely. There is this tunneling thing, but I never got it to work.
> In the end, using a SSH tunnel may prove to be even easier :-D
> (just let sshd listen on port 80 and you're set)

I think if you want to get serious about authentication, SSL has more
of a developed infrastructure.  Frankly I've never understood why ssh
caught on instead of telnet over SSL.  See stunnel.org for a simple
SSL tunnel.


From tom.willis at gmail.com  Thu Feb 10 22:32:43 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Thu, 10 Feb 2005 22:32:43 -0500
Subject: Unit Testing in Python
In-Reply-To: <1108092157.371659.282070@z14g2000cwz.googlegroups.com>
References: <1108087841.271630.228970@o13g2000cwo.googlegroups.com>
	<roy-D161EC.21340610022005@reader2.panix.com>
	<mailman.2361.1108089695.22381.python-list@python.org>
	<1108092157.371659.282070@z14g2000cwz.googlegroups.com>
Message-ID: <b54d04890502101932320a6a86@mail.gmail.com>

It could be a bug in gmail. I wasn't actually accusing you, just
thought it was funny enough to point out. Of course you could be more
sarcastic than me who knows. :)

I'm not worried though. I believe the best strategy against Identity
theft is bad credit.

So question , do you see the big red block on your own posts, or have
I been sitting in front of the puter too long?


On Thu, 10 Feb 2005 19:25:13 -0800 (PST), rhat <fakeadmin at gmail.com> wrote:
> Yeah, you know I only ask questions about Test-driven development
> basics in hopes of obtaining your personal information, so that I can
> sell it on the Molodovian blackmarket. I'm not a "Phisher", I'm a
> comp-sci major who's too lazy to dig around for his own answers. ;)
> 
> Thanks for your help Roy, I wasn't sure what the difference between
> unittest and pyunit were.
> --|2 \| /-\ |\| |</-\|_||_/-\|<15   (the uber-l33t version of my
> supersecret "phishing" alias which just so happens to be my actual
> name)
> 
> PS: Yeah, I too am plerplexed as to why gmail allowed me to register
> "fakeadmin" as a login. Sure makes a good conversation started though.
> =P
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
Thomas G. Willis
http://paperbackmusic.net


From enleverlesO.OmcO at OmclaveauO.com  Fri Feb 11 16:29:10 2005
From: enleverlesO.OmcO at OmclaveauO.com (Do Re Mi chel La Si Do)
Date: Fri, 11 Feb 2005 22:29:10 +0100
Subject: Concurrent Python
References: <mailman.2402.1108141892.22381.python-list@python.org>
Message-ID: <420d416e$0$17298$8fcfb975@news.wanadoo.fr>

Hi !

You can found few ideas here :

    http://candygram.sourceforge.net


@-salutations
-- 
Michel Claveau




From ncoghlan at iinet.net.au  Sun Feb 13 21:34:42 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Mon, 14 Feb 2005 12:34:42 +1000
Subject: builtin functions for and and or?
In-Reply-To: <ytRPd.4677$ZZ.1609@newssvr23.news.prodigy.net>
References: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>	<cuofcj$jvt$02$1@news.t-online.com>
	<ytRPd.4677$ZZ.1609@newssvr23.news.prodigy.net>
Message-ID: <42100E42.1050300@iinet.net.au>

Roose wrote:
> It would be a lot simpler if it was included in the distribution.  I would
> be willing to add it (even though it is completely trivial).  I think it
> would go fine in itertools (I would even put them as builtins, but I'm not
> going to go there because probably not everyone uses it as often as I do).
> 
> What do people think?  I have never done this, would I just write up a PEP?

I've posted a question to py-dev about it. If Raymond (the itertools maintainer) 
is supportive, then a PEP may not be needed. If not. . . yeah, a PEP would 
probably be required.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From farcepest at gmail.com  Thu Feb 17 18:58:09 2005
From: farcepest at gmail.com (Andy Dustman)
Date: 17 Feb 2005 15:58:09 -0800
Subject: MYSQL - how to install ?
References: <1108547199.260223.211450@f14g2000cwb.googlegroups.com>
	<1108556905.444394.210020@l41g2000cwc.googlegroups.com>
	<1108562949.825258.297260@f14g2000cwb.googlegroups.com>
	<mailman.2686.1108564423.22381.python-list@python.org>
	<1108635996.165520.132960@o13g2000cwo.googlegroups.com>
Message-ID: <1108684689.617676.213510@g14g2000cwa.googlegroups.com>

For those of you who care, the latest stable version of MySQLdb is
1.2.0. Currently there is not a WIndows installer, however.  I do not
have the toolchain to build it, either; I depend on people to donate
installers.  If you have Python from the python.org packages and MySQL
from the mysql.com packages on Windows, and you have the necessary
compiler to build MySQLdb, please consider running:

python setup.py bdist_wininst

to build an installer and letting me know via the SourceForge contact
page:

https://sourceforge.net/sendmessage.php?touser=71372

I'm sure you'll make some poor Windows users very happy. I'll accept
packages for any combination of MySQLdb-{1.0.1,1.2.0}, MySQL-{4.0,4.1},
Python-{2.1,2.2,2.3,2,4} (though I think Python<2.3 is a bit moldy, and
it not guaranteed to work with MySQLdb-1.2.0). Please remember, your
package must work with the standard packages.



From deetsNOSPAM at web.de  Wed Feb  2 13:52:03 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 02 Feb 2005 19:52:03 +0100
Subject: Python for S60 mentioned in a mainstream Finnish e-news website
References: <du7wttrb8wf.fsf@lehtori.cc.tut.fi>
	<du7sm4fb3dg.fsf@lehtori.cc.tut.fi> <651bduh8.fsf@python.net>
	<du7r7jz5dvk.fsf@lehtori.cc.tut.fi>
	<42012063$0$28992$e4fe514c@news.xs4all.nl>
Message-ID: <ctr7gj$ioj$03$2@news.t-online.com>

> <offtopic>
> Heh, this somehow reminds me about the way shared libraries were
> implemented on the Amiga.
> No linking step; the function entry points were essentially a
> big jump table in the library structure with every function having
> a unique offset from the library's base.
> Proved to make it very simple to patch OS functions too: just
> patch the jump address in the jump table to jump to the patched
> library function...
> </offtopic>


The good old times - only address 4 was used, and then you loaded everything
else. I'm no dynamic loading expert - but I don't think that in the end,
things are much different - just a layer of indirection for a jump target.
-- 
Regards,

Diez B. Roggisch


From tundra at tundraware.com  Tue Feb 15 06:33:48 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 15 Feb 2005 06:33:48 EST
Subject: Accessing Objects Based On Their ID
Message-ID: <uc39e2-63h1.ln1@eskimo.tundraware.com>

This is probably obvious to you Python Geniuses (tm) out there but,
it is very late and I am experiencing Brain Fade:

Given the ID of an object, is there a way to access it?  For example,
if we have the ID of a class instance, is there a way to invoke its
methods and attributes knowning only that ID?  Similarly, if we have the
ID of a function, is there a way to call it?

This comes up because of an implementation I had in mind wherein I
would store the IDs of a notionally linked-list of objects - but without
the link - I just want to store their IDs in the desired order.  But later,
when I want to actually use the objects I need a way to get from ID back
to something accessible in the namespace...

TIA,
-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/



From enleverlesO.OmcO at OmclaveauO.com  Sun Feb  6 15:43:25 2005
From: enleverlesO.OmcO at OmclaveauO.com (Do Re Mi chel La Si Do)
Date: Sun, 6 Feb 2005 21:43:25 +0100
Subject: Curses on Windows
References: <72c8d50d.0502060630.1c561599@posting.google.com>
Message-ID: <420693d4$0$25793$8fcfb975@news.wanadoo.fr>

same symptoms


@-salutations
-- 
Michel Claveau





From jcondon at air-worldwide.com  Thu Feb 17 13:14:37 2005
From: jcondon at air-worldwide.com (JRCondon)
Date: Thu, 17 Feb 2005 13:14:37 -0500
Subject: Calling a function from module question.
References: <UTsQd.32669$6u.27954@fed1read02>
	<42125d6d$0$28977$e4fe514c@news.xs4all.nl>
	<3LtQd.32674$6u.18210@fed1read02>
Message-ID: <d1f45bd2ed5d8b9362ca36b1d21262df@localhost.talkaboutprogramming.com>

Sean, if you are asking what I think you are asking (I don't think name
hiding is the issue), you can use

from module_name import *

and you will end up with all of the functions at session scope.  You can
use the 'as' to alias the function names if you wish

from module_name import fn1 as myfn1, fn2 as myfn2

but, um, that gets confusing.



From paulpaterson at users.sourceforge.net  Fri Feb  4 19:52:46 2005
From: paulpaterson at users.sourceforge.net (Paul Paterson)
Date: Sat, 05 Feb 2005 00:52:46 GMT
Subject: executing VBScript from Python and vice versa
In-Reply-To: <mailman.1915.1107548562.22381.python-list@python.org>
References: <mailman.1915.1107548562.22381.python-list@python.org>
Message-ID: <yNUMd.11829$sr1.11672@fe2.texas.rr.com>

Valentina Boycheva wrote:
> Is there a way to make programs written in these two languages communicate
> with each other? I am pretty sure that VBScript can access a Python script
> because Python is COM compliant. On the other hand, Python might be able to
> call a VBScript through WSH. Can somebody provide a simple example? I have
> exactly 4 days of experience in Python (and fortunately, much more in VB6)
> 
> Thanks.
> 

This should help for Python accessing VBScript,

 >>> import win32com.client
 >>> vbhost = win32com.client.Dispatch("ScriptControl")
 >>> vbhost.language = "vbscript"
 >>> vbhost.addcode("Function two(x)\ntwo=2*x\nEnd Function\n")
 >>> vbhost.eval("two(2)")
4
 >>>

Alternatively you could try to convert your VBScript to Python.

http://vb2py.sourceforge.net/demo.htm

Regards,

Paul


From pronovic at skyjammer.com  Wed Feb 23 02:03:56 2005
From: pronovic at skyjammer.com (Kenneth Pronovici)
Date: Wed, 23 Feb 2005 01:03:56 -0600
Subject: LC_ALL and os.listdir()
Message-ID: <20050223070348.GA7565@skyjammer.com>

I have some confusion regarding the relationship between locale,
os.listdir() and unicode pathnames.  I'm running Python 2.3.5 on a
Debian system.  If it matters, all of the files I'm dealing with are on
an ext3 filesystem.

The real code this problem comes from takes a configured set of
directories to deal with and walks through each of those directories
using os.listdir().

Today, I accidentally ran across a directory containing three "normal"
files (with ASCII filenames) and one file with a two-character unicode
filename.  My code, which was doing something like this:
   
   for entry in os.listdir(path):   # path is <type 'unicode'>
      entrypath = os.path.join(path, entry)

suddenly started blowing up with the dreaded unicode error:

   UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in 
   position 1: ordinal not in range(128)

To add insult to injury, it only happend for one of my test users, not
the others.

I ultimately traced the difference in behavior to the LC_ALL setting in
the environment.  One user had LC_ALL set to en_US, and the other didn't
have it set at all.

For the user with LC_ALL set, the os.listdir() call returned this, and
the os.path.join() call succeeded:

   [u'README.strange-name', u'\xe2\x99\xaa\xe2\x99\xac', 
    u'utflist.long.gz', u'utflist.cp437.gz', u'utflist.short.gz']

For the other user without LC_ALL set, the os.listdir() call returned
this, and the os.path.join() call failed with the UnicodeDecodeError
exception:

   [u'README.strange-name', '\xe2\x99\xaa\xe2\x99\xac', 
    u'utflist.long.gz', u'utflist.cp437.gz', u'utflist.short.gz']

Note that in this second result, element [1] is not a unicode string
while the other three elements are.

Can anyone explain:

   1) Why LC_ALL has any effect on the os.listdir() result? 
   2) Why only 3 of the 4 files come back as unicode strings?
   3) The proper "general" way to deal with this situation?

My goal is to build generalized code that consistently works with all
kinds of filenames.  Ultimately, all I'm trying to do is copy some files
around.  I'd really prefer to find a programmatic way to make this work
that was independent of the user's configured locale, if possible.

Thanks for the help,

KEN

--
Kenneth J. Pronovici <pronovic at ieee.org>


From neutrinman at myrealbox.com  Thu Feb 24 12:30:56 2005
From: neutrinman at myrealbox.com (neutrinman at myrealbox.com)
Date: 24 Feb 2005 09:30:56 -0800
Subject: what is wrong?
References: <1109262849.733430.13020@f14g2000cwb.googlegroups.com>
Message-ID: <1109266256.697167.213790@o13g2000cwo.googlegroups.com>

I appreciate all of your help.
I learned a lot form your adovice.
Thanks.

Mr. Bieber, it worked fine. Thanks again.



From nav+posts at bandersnatch.org  Mon Feb 21 14:47:49 2005
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: Mon, 21 Feb 2005 14:47:49 -0500
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr>
	<42185b05$0$15460$9b622d9e@news.freenet.de>
	<cv9sdo$69n$3@usenet.otenet.gr>
	<42189527$0$6260$9b622d9e@news.freenet.de>
	<cvadcj$mqc$1@usenet.otenet.gr>
	<mailman.2866.1108917759.22381.python-list@python.org>
	<cvafgu$2lk$1@usenet.otenet.gr>
	<4218cafe$0$8790$9b622d9e@news.freenet.de>
	<1108922969.140196.304380@z14g2000cwz.googlegroups.com>
	<878y5i9ayp.fsf@localhost.localdomain.i-did-not-set--m
	<4219fca9$0$44593$a1866201@visi.com>
Message-ID: <87zmxx7l0a.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>

Grant Edwards <grante at visi.com> writes:

> I've never understood the problem with long URLs.  Many
> newsreaders let you click on them.  If not, you just cut/paste
> it into a browser (with a shellscript a couple lines long, you
> can start firefox with the URL on the X clipboard with a single
> command).

I use Gnus through a screen session, so when I select and copy a long
URL I get backslash characters in the copied text (as amusing as it
is, w3 is not a satisfying browsing experience for me :^). It's not
hard to manually pick out the backslashes, but it's time consuming and
kind of tedious. I use an open-source terminal app (iTerm under OS X),
so I guess I could hack the "open in browser" function to remove the
backslashes... Hmm...

Side projects aside, URLs less than 79 characters long are just easier
to handle in many ways.

Nick

-- 
#  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this to a python
print reduce(lambda x,y:x+chr(ord(y)-1),' Ojdl!Wbshjti!=obwAcboefstobudi/psh?')


From steve at holdenweb.com  Fri Feb  4 11:24:06 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 04 Feb 2005 11:24:06 -0500
Subject: OT: why are LAMP sites slow?
In-Reply-To: <mailman.1892.1107532773.22381.python-list@python.org>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>	<opslnkqsjo6yt6e7@news.cisco.com>	<7xhdktt36q.fsf@ruckus.brouhaha.com>	<opslnr3rbs6yt6e7@news.cisco.com>	<7xacqkc0uq.fsf@ruckus.brouhaha.com>
	<mailman.1892.1107532773.22381.python-list@python.org>
Message-ID: <VpNMd.103072$Jk5.79808@lakeread01>

Jack Diederich wrote:

> On Thu, Feb 03, 2005 at 10:09:49PM -0800, Paul Rubin wrote:
> 
>>aurora <aurora00 at gmail.com> writes:
>>
>>>I'm lost. So what do you compares against when you said LAMP is slow?
>>>What  is the reference point? Is it just a general observation that
>>>slashdot is  slower than we like it to be?
> 
> [reordered Paul's email a bit]
> 
> 
>>>If you mean MySQL or SQL database in general is slow, there are truth
>>>in  it. The best thing about SQL database is concurrent access,
>>>transactional  semantics and versatile querying. Turns out a lot of
>>>application can  really live without that. If you can rearchitect the
>>>application using  flat files instead of database it can often be a
>>>big bloom.
>>
>>This is the kind of answer I had in mind.
> 
> 
> *ding*ding*ding*  The biggest mistake I've made most frequently is using
> a database in applications.  YAGNI.  Using a database at all has it's
> own overhead.  Using a database badly is deadly.  Most sites would
> benefit from ripping out the database and doing something simpler.
> Refactoring a database on a live system is a giant pain in the ass,
> simpler file-based approaches make incremental updates easier.
> 
> The Wikipedia example has been thrown around, I haven't looked at the
> code either;  except for search why would they need a database to
> look up an individual WikiWord?  Going to the database requires reading
> an index when pickle.load(open('words/W/WikiWord')) would seem sufficient.
> 
[...]
>>
>>I don't mean LAMP is inherently slow, I just mean that a lot of
>>existing LAMP sites are observably slow.
> 
> 
> A lot of these are just implementation.  Going the dumb non-DB way won't
> prevent you from making bad choices but if a lot of bad choices are made
> simply because of the DB (my assertion) dropping the DB would avoid
> some bad choices.  I think Sourceforge has one table for all project's
> bugs & patches.  That means a never used project's bugs take up space
> in the index and slow down access to the popular projects.  Would a
> naive file-based implementation have been just as bad?  maybe.
> 
> If there is interest I'll follow up with some details on my own LAMP
> software which does live reports on gigs of data and - you guessed it -
> I regret it is database backed.  That story also involves why I started
> using Python (the prototype was in PHP).
> 
Having said all this, I'd happily campaign for a relational backend to 
MoinMoin if it would speed up the execrably slow performance we 
currently see on the python.org wiki. I haven't investigated why 
response times went up so much, but I have a distinct feeling it's to do 
with a new release.

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From bvdeenen at xs-four-all.nl.invalid  Thu Feb 17 03:38:08 2005
From: bvdeenen at xs-four-all.nl.invalid (Bart van Deenen)
Date: Thu, 17 Feb 2005 09:38:08 +0100
Subject: :-)
References: <cuuol5$2ri$1@news1.kornet.net>
	<3e8ca5c8050215223851664ca5@mail.gmail.com>
	<mailman.2676.1108536285.22381.python-list@python.org>
Message-ID: <1gs4g2a.1cinruy1i06qq8N%bvdeenen@xs-four-all.nl.invalid>

Jack Diederich <jack at performancedrivers.com> wrote:

> /tmp/> python
> Python 2.3.4 (#2, Jan  5 2005, 08:24:51) 
> Type "help", "copyright", "credits" or "license" for more information.
> >>> ^D


 :-) :-) :-) :-) :-) :-) :-) :-) :-) :-) :-) :-) :-)

Bart


From fredrik at pythonware.com  Mon Feb  7 11:33:50 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 7 Feb 2005 17:33:50 +0100
Subject: SOS Win - How to save metafile as Bitmap ?
References: <42072DBA.4020409@citromail.hu>
Message-ID: <cu856h$acl$1@sea.gmane.org>

<fowlertrainer at citromail.hu> wrote:

> My problem is that: I have a program that copy pictures from Notes NSF file.
> The format is METAFILE or METAFILEPICT.

> But I need to convert them to BMP files.
> I have wxPython, and PIL, and win32api ext.

here's one way to do it:

    http://www.effbot.org/downloads/#pilwmf

see the README file in the source distribution for details:

    http://www.effbot.org/downloads/index.cgi/pilwmf-1.0b2-20040224.zip/README

</F> 





From mahs at telcopartners.com  Sat Feb  5 14:07:12 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sat, 05 Feb 2005 11:07:12 -0800
Subject: changing local namespace of a function
In-Reply-To: <4204E42B.7040105@iinet.net.au>
References: <cu0lru$8ik$1@joe.rice.edu>	<cu0sj5$sfk$1@sea.gmane.org>	<4204400C.5060608@iinet.net.au>	<mailman.1948.1107575575.22381.python-list@python.org>	<cu1l9o$3oq$1@joe.rice.edu>	<1griamw.a425vd8qqrklN%aleaxit@yahoo.com>
	<4204E42B.7040105@iinet.net.au>
Message-ID: <cu35ai$irl$1@sea.gmane.org>

> Alex Martelli wrote:
>> Hmmm, you do realize that wrapdict uses a lot of indirection while my
>> equivalent approach, just posted, is very direct, right?  To reiterate
>> the latter, and dress it up nicely too, it's
>>
>> class wrapwell(object):
>>     def __init__(self, somedict):
>>         self.__dict__ = somedict
>>

Bad mistake on my part, sorry!


Nick Coghlan wrote:
> ... a class that combined property access with the above...
>  
In a similar vein to Nick's solution:

class AutoProperty(object):
     def __init__(self, meth):
        self.meth = meth
        self.name = meth.__name__
        self.__doc__ = meth.__doc__
     def __get__(self, obj, cls):
         if isinstance(obj, cls):
             return obj.__dict__.setdefault(self.name, self.meth(obj))
         else:
             return self.__doc__
     # You could define __set__ and __del__ but they don't seem
     # necessary based on what you've said so far


class DataManipulator(object):
     def __init__(self, data):
         self.__dict__ = data

class Model(DataManipulator):
     def z(self):
         """x+y"""
         return self.x+self.y
     z = AutoProperty(z)

     def z1(self):
         """Or any other useful information"""
         return self.z + self.x
     z1 = AutoProperty(z1)

     # You could automate these calls to AutoProperty in a metaclass

  >>> a = {'x':1, 'y':2}
  >>> b = {'x':3, 'y':3}
  >>> d = Model(a)
  >>> d.z
3
  >>> d.z1
4
  >>> a
{'y': 2, 'x': 1, 'z': 3, 'z1': 4}
  >>> d=  Model(b)
  >>> d.z1
9
  >>> b
{'y': 3, 'x': 3, 'z': 6, 'z1': 9}
  >>>

Michael




From sese at 263.net  Fri Feb 11 01:06:25 2005
From: sese at 263.net (SeSe)
Date: Fri, 11 Feb 2005 14:06:25 +0800
Subject: PyINI : Cross-Platform INI parser
Message-ID: <cuhiak$2gl8$1@mail.cn99.com>

hi, every one,

I started a opensource project PyINI for corss-platform *.ini parsing at
http://sourceforge.net/projects/pyini/

I have released a simple alpha version, which can read *.ini, with some
extended features such as "key=value1,value2,value3". I also made a
c++ binding to PyINI with elmer toolkit.

Yours,
SeSe


From gsakkis at rutgers.edu  Sun Feb 13 17:27:11 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: Sun, 13 Feb 2005 17:27:11 -0500
Subject: builtin functions for and and or?
References: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>
Message-ID: <37a2i0F58gsbsU1@individual.net>

"Roose" <b at b.b> wrote in message news:y9PPd.4645$ZZ.528 at newssvr23.news.prodigy.net...
> I need this a lot: a one line way to do a n-ary and or 'or'.
>
> e.g.,
>
> result = True
> for x in L:
>   if not boolean_function(x):
>     result = False
>
> or
>
> >>> reduce(operator.__and__, [boolean_function(x) for x in L)
>
> So usually I just write a little function any( L, boolean_function =
> identity ) or all( ... ).  But I am kind of sick of doing that all the
> time -- does it exist anywhere in the Python libraries?  It seems really
> common to me.
>
> The first way isn't satisfactory because it takes so many lines for what is
> essentially one "primitive" operation.  The second way isn't great because
> it is not as readable and many readers don't like to see reduce, even if it
> is a common idiom like that.  Also I don't believe it short circuits.


You're right, it doesn't short circuit, as most of the examples posted above. Here's one that it
does:

from itertools import ifilter, dropwhile

def any(pred, iterable):
    try: ifilter(pred,iterable).next()
    except StopIteration: return False
    else: return True

def all(pred, iterable):
    try: dropwhile(pred,iterable).next()
    except StopIteration: return True
    else: return False


George




From cam.ac.uk at mh391.invalid  Mon Feb 14 05:54:44 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Mon, 14 Feb 2005 10:54:44 +0000
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cupv2t$kfs$3@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108370491.792820.142200@z14g2000cwz.googlegroups.com>
	<cuprg2$6rt$1@usenet.otenet.gr> <cupsgb$lem$1@gemini.csx.cam.ac.uk>
	<cupv2t$kfs$3@usenet.otenet.gr>
Message-ID: <cuq01n$t8t$1@gemini.csx.cam.ac.uk>

Ilias Lazaridis wrote:
> [REQUOTE]

Oh, I can play that game too:

 >> [REQUOTE]
 >> Identify what needs to be done and create a patch, and it will be
 >> accepted if it is a good patch.

MinGW patches have been accepted before. Start submitting yours. As
you point out, there is stuff on the web that means you will escape the
bulk of the work. But not all of the work.

Since you are intent on whining rather than doing the work I'm
ignoring this thread now. Good luck.
-- 
Michael Hoffman


From ilias at lazaridis.com  Tue Feb 15 16:15:30 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 23:15:30 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <86d5v1im9z.fsf@guru.mired.org>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr> <37bkemF5a7s7vU1@individual.net>
	<cut6nh$rpk$1@usenet.otenet.gr> <86ll9piuj8.fsf@guru.mired.org>
	<cutf1h$576$1@usenet.otenet.gr>
	<mailman.2644.1108496325.22381.python-list@python.org>
	<cutk8f$qu2$1@usenet.otenet.gr> <86d5v1im9z.fsf@guru.mired.org>
Message-ID: <cutopg$hfn$1@usenet.otenet.gr>

Mike Meyer wrote:
> Ilias Lazaridis <ilias at lazaridis.com> writes:
>>Joe Francia wrote:
>>>Ilias Lazaridis wrote:
>>
>>[...]
>>
>>>>MinGW compatibility is not [only] my need.
>>>>
>>>>It is an community need [at least partially]
>>>
>>>You keep using that word "community". I do not think it means what
>>>you think it means.
>>
>>The community is everyone around python (including me at this moment).
> 
> Then clearly, MingW is *not* a community need. I'm around Python. That
> makes me part of the community by your definition. I have no need for
> MingW (in fact, it doesn't run on anything I do development
> on). Ergo, MingW is not a community need.

I see.

Time to close this thread.

Nothing essential anymore.

.

-- 
http://lazaridis.com


From mhuffnagle at knowtechnology.net  Thu Feb  3 17:04:27 2005
From: mhuffnagle at knowtechnology.net (Marc Huffnagle)
Date: Thu, 03 Feb 2005 17:04:27 -0500
Subject: List mapping question
Message-ID: <g-mdnXrKqZd2Ap_fRVn-rw@midcoast.com>

I have a number of variables that I want to modify (a bunch of strings 
that I need to convert into ints).  Is there an easy way to do that 
other than saying:

 > a = int(a)
 > b = int(b)
 > c = int(c)

I tried

 > [i = int(i) for i in [a, b, c]]

but that didn't work because it was creating a list with the values of 
a, b and c instead of the actual variables themselves, then trying to 
set a string equal to an integer, which it really didn't like.

      Marc


From ilias at lazaridis.com  Mon Feb 14 06:24:47 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Mon, 14 Feb 2005 13:24:47 +0200
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cuq01n$t8t$1@gemini.csx.cam.ac.uk>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108370491.792820.142200@z14g2000cwz.googlegroups.com>
	<cuprg2$6rt$1@usenet.otenet.gr> <cupsgb$lem$1@gemini.csx.cam.ac.uk>
	<cupv2t$kfs$3@usenet.otenet.gr> <cuq01n$t8t$1@gemini.csx.cam.ac.uk>
Message-ID: <cuq1pu$4lv$1@usenet.otenet.gr>

Michael Hoffman wrote:
> Ilias Lazaridis wrote:
> 
>> [REQUOTE]
> Oh, I can play that game too:
> 
>>> [REQUOTE]
>>> Identify what needs to be done and create a patch, and it will be
>>> accepted if it is a good patch.

"
c) Why are the following efforts not _directly_ included in the python 
source code base?

http://jove.prohosting.com/iwave/ipython/pyMinGW.html
"

> MinGW patches have been accepted before. 

ok

I extract the answer to c)

"MinGW pathces have been accepted before, thus the efforts should be 
simply sent in form of patches to the python crew, which will most 
possibly accept them, as they are neccessary to compile python under the 
popular MinGW compiler"

> Start submitting yours. 

I don't have

> As
> you point out, there is stuff on the web that means you will escape the
> bulk of the work. But not all of the work.

If the Python Foundation detects the importancy, _every_ user will 
escape the 'bulk of the work', as it should be for a serious development.

There is no need that everyone runs in the same traps, due to some 
missing organization in the core-project.

> Since you are intent on whining rather than doing the work I'm
> ignoring this thread now. Good luck.

Thank you for your answers and your time.

.

-- 
http://lazaridis.com


From alecw at pobox.com  Thu Feb 24 15:20:59 2005
From: alecw at pobox.com (Alec Wysoker)
Date: Thu, 24 Feb 2005 15:20:59 -0500
Subject: Trouble with mysql-python 1.2.0 on Solaris 8 sparc
In-Reply-To: <421E3436.7000505@holdenweb.com>
References: <1108755202.574729.293610@g14g2000cwa.googlegroups.com>
	<1108925639.345790.230510@c13g2000cwb.googlegroups.com>
	<1109255132.541839.207530@o13g2000cwo.googlegroups.com>
	<421E1BA1.2030703@holdenweb.com>
	<6.1.2.0.0.20050224135003.0237bda0@mail.comcast.net>
	<421E3436.7000505@holdenweb.com>
Message-ID: <6.1.2.0.0.20050224151838.0255e378@mail.comcast.net>

Do you mean the python glue code?  I am having this problem when python is not in the picture at all, just running mysql command-line client.  Presumably my client is 4.1.10, as it came in a built package along with the 4.1.10 server.  In fact, the following seems to indicate that it is the right version:

/usr/local/mysql/bin/mysql --version
/usr/local/mysql/bin/mysql  Ver 14.7 Distrib 4.1.10, for sun-solaris2.8 (sparc)


At 03:08 PM 2/24/2005, Steve Holden wrote:
>Alec Wysoker wrote:
>
>>Hi Steve,
>>Thanks for the response.  I don't think this is the problem.  When I connect to the remote machine, it says this:
>>Your MySQL connection id is 58 to server version: 4.1.0-alpha-standard
>>When I connect to the local server, I get this:
>>Your MySQL connection id is 6 to server version: 4.1.10-standard
>>One would assume that 4.1.0 and 4.1.10 are compatible, no?
>Indeed. Sorry I couldn't be of more assistance. I suspected that the MySQLdb driver was somehow compiled with 4.0-or-earlier client software - is this possible?
>
>regards
> Steve
>-- 
>Steve Holden        +1 703 861 4237  +1 800 494 3119
>Holden Web LLC             http://www.holdenweb.com/
>Python Web Programming  http://pydish.holdenweb.com/
>




From richie at entrian.com  Thu Feb 10 10:21:47 2005
From: richie at entrian.com (Richie Hindle)
Date: Thu, 10 Feb 2005 15:21:47 +0000
Subject: lambda and for that matter goto not forgetting sugar
In-Reply-To: <tFJOd.38794$68.10179@fe1.news.blueyonder.co.uk>
References: <tFJOd.38794$68.10179@fe1.news.blueyonder.co.uk>
Message-ID: <uqum01969uca8ued0sj1rbmk2noos6hs5k@4ax.com>


[Philip]
> For that matter I would find implementing the classical algorithms far 
> easier if python had 'goto'

I can't believe it - first a request for COMEFROM and now one for GOTO,
both on the same day.  I should have put http://entrian.com/goto/ under a
commercial license.  8-)

-- 
Richie Hindle
richie at entrian.com



From apardon at forel.vub.ac.be  Sat Feb 12 14:07:14 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 12 Feb 2005 19:07:14 GMT
Subject: exception handling for a function returning several values
References: <3064b51d.0502111701.1731fef3@posting.google.com>
Message-ID: <slrnd0skv0.mu3.apardon@rcpc42.vub.ac.be>

On 2005-02-12, beliavsky at aol.com <beliavsky at aol.com> wrote:
> If a function that normally returns N values raises an exception, what
> should it return?

Maybe it shouldn't return anything but instead of cathing the
exception it should let the caller handle it.

> N values of None seems reasonable to me, so I would
> write code such as
>
> def foo(x):
>     try:
>        # code setting y and z
>        return y,z
>     except:
>        return None,None
>
> y,z = foo(x)
>
> If I try to use y or z inappropriately when they are None, the program
> will stop. An alternative is to return an error flag in addition to y
> and z from function foo and check the value of the error flag in the
> calling program. This seems a bit awkward.

what about the following.

def foo(x):

  # code setting y and z
  return x,z

try
  y,z = foo(x)
except ... :
  # Handle errors.

-- 
Antoon Pardon


From francis.girard at free.fr  Thu Feb 10 18:49:15 2005
From: francis.girard at free.fr (Francis Girard)
Date: Fri, 11 Feb 2005 00:49:15 +0100
Subject: A great Alan Kay quote
In-Reply-To: <e93d44dc887ffe19d754bc697128b37a@gmail.com>
References: <420a5c1e$0$21630$a1866201@visi.com>
	<200502101943.36347.francis.girard@free.fr>
	<e93d44dc887ffe19d754bc697128b37a@gmail.com>
Message-ID: <200502110049.15030.francis.girard@free.fr>

Le jeudi 10 F?vrier 2005 19:47, PA a ?crit?:
> On Feb 10, 2005, at 19:43, Francis Girard wrote:
> > I think he's a bit nostalgic.
>
> Steve Wart about "why Smalltalk never caught on":
>
> http://hoho.dyndns.org/~holger/smalltalk.html
>
> Cheers
>
> --
> PA, Onnay Equitursay
> http://alt.textdrive.com/

!!!!!

Francis Girard



From mwm at mired.org  Tue Feb 15 15:46:48 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 15 Feb 2005 14:46:48 -0600
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr> <37bkemF5a7s7vU1@individual.net>
	<cut6nh$rpk$1@usenet.otenet.gr> <86ll9piuj8.fsf@guru.mired.org>
	<cutf1h$576$1@usenet.otenet.gr>
	<mailman.2644.1108496325.22381.python-list@python.org>
	<cutk8f$qu2$1@usenet.otenet.gr>
Message-ID: <86d5v1im9z.fsf@guru.mired.org>

Ilias Lazaridis <ilias at lazaridis.com> writes:

> Joe Francia wrote:
>> Ilias Lazaridis wrote:
> [...]
>>> MinGW compatibility is not [only] my need.
>>>
>>> It is an community need [at least partially]
>> You keep using that word "community". I do not think it means what
>> you think it means.
>
> The community is everyone around python (including me at this moment).

Then clearly, MingW is *not* a community need. I'm around Python. That
makes me part of the community by your definition. I have no need for
MingW (in fact, it doesn't run on anything I do development
on). Ergo, MingW is not a community need.

     <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From fredrik at pythonware.com  Tue Feb 15 06:45:19 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 15 Feb 2005 12:45:19 +0100
Subject: Accessing Objects Based On Their ID
References: <uc39e2-63h1.ln1@eskimo.tundraware.com>
Message-ID: <cusn7r$kdu$1@sea.gmane.org>

Tim Daneliuk wrote:

> This is probably obvious to you Python Geniuses (tm) out there but,
> it is very late and I am experiencing Brain Fade:
>
> Given the ID of an object, is there a way to access it?

short answer: no.

longer answer: write a small C extension that casts an integer (or long integer)
argument to a PyObject, increments the refcount, and returns the object.  or
use gc.get_objects() to get a list of all GC-aware objects, and see if your object
is in there.  etc.  all solutions are fragile, non-portable, and/or inefficient.

> This comes up because of an implementation I had in mind wherein I
> would store the IDs of a notionally linked-list of objects - but without
> the link - I just want to store their IDs in the desired order.  But later,
> when I want to actually use the objects I need a way to get from ID back
> to something accessible in the namespace...

sounds like "import weakref" might be what you need.

</F> 





From duncan.booth at invalid.invalid  Wed Feb 16 04:15:07 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 16 Feb 2005 09:15:07 GMT
Subject: super not working in __del__  ?
References: <cuu0pu$t44$1@sea.gmane.org>
	<mailman.2678.1108537188.22381.python-list@python.org>
Message-ID: <Xns95FF5DA14D6F0duncanrcpcouk@127.0.0.1>

Fredrik Lundh wrote:

> in this case,
> 
>   def __del__(self):
>     super(self.__class__, self).__del__()
> 
> should do the trick.

Only if nobody ever tries to subclass your class, and if they aren't going 
to subclass it why bother to use super in the first place.

>>> class Base(object):
	def __del__(self):
		print "Base.__del__"

		

>>> class A(Base):
	def __del__(self):
		print "A.__del__"
		super(self.__class__, self).__del__()

		
>>> class B(A):
	def __del__(self):
		print "B.__del__"
		super(self.__class__, self).__del__()

		
>>> a = A()

>>> del a
A.__del__
Base.__del__
>>> 
>>> b = B()
>>> del b
B.__del__
A.__del__
A.__del__
A.__del__
A.__del__
A.__del__
... and so on ...

I don't see any easy way to ensure that the __del__ method gets passed up 
the chain safely.


From garabik at kassiopeia.juls.savba.sk  Wed Feb 23 04:04:33 2005
From: garabik at kassiopeia.juls.savba.sk (Radovan Garabik)
Date: 23 Feb 2005 09:04:33 GMT
Subject: display VARCHAR(mysql) and special chars in html
References: <mailman.2900.1109014601.22381.python-list@python.org>
	<cvhd74$6be$1@ork-un.noris.net>
Message-ID: <382v91F5kn8q1U1@individual.net>

Wolfram Kraus <kraus at hagen-partner.de> wrote:
> Jonas Meurer wrote:
>> hello,
>> 
>> my script selects a comment saved as VARCHAR in MySQL and displays it
>> inside an html page.
>> 
>> the problem is, that the comment contains several special characters, as
>> mysterious utf-8 hyphens, german umlauts, etc.
>> 
>> i could write a function to parse the comment and substitute special
>> chars with the relevant html code, but maybe this already exists in some
>> module?
>> 
>> if not, it'll be hard work, as i've to consider many special chars, and
>> at least iso-8859-1* and utf-8 as charmaps.
>> 
>> bye
>>  jonas
> If I understand you correctly, just put
> 
> <meta http-equiv="CONTENT-TYPE" content="text/html; charset=utf-8">
> 
> somewhere in the <head>-section of you HTML-Page.

... and make sure the deault charset of your HTTP server is *OFF* (or
UTF-8), since it overrides the per-page setting (most unfortunate).

-- 
 -----------------------------------------------------------
| Radovan Garab?k http://melkor.dnp.fmph.uniba.sk/~garabik/ |
| __..--^^^--..__    garabik @ kassiopeia.juls.savba.sk     |
 -----------------------------------------------------------
Antivirus alert: file .signature infected by signature virus.
Hi! I'm a signature virus! Copy me into your signature file to help me spread!


From ncoghlan at iinet.net.au  Sun Feb 20 09:03:57 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Mon, 21 Feb 2005 00:03:57 +1000
Subject: [ANN] Python 2.4 Quick Reference available
In-Reply-To: <37qaleF5gd7bcU1@individual.net>
References: <cv79sj$mgk$1@aphrodite.grec.isp.9tel.net>	<1108831318.290846.5930@z14g2000cwz.googlegroups.com>	<qnkll9kv09y.fsf@arbutus.physics.mcmaster.ca>
	<37qaleF5gd7bcU1@individual.net>
Message-ID: <421898CD.6040408@iinet.net.au>

George Sakkis wrote:
> Still the word "open" sounds too general if the meaning is "open a file-like object"; OTOH this
> could be a good thing if in some future version "open('http://www.python.org')" was e.g. an alias to
> urllib2.urlopen.

Exactly the reason the BDFL gave for preferring 'open' - it may be extended to 
opening other types of objects than files.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From kartic.krishnamurthy at gmail.com  Thu Feb 24 11:16:41 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 24 Feb 2005 08:16:41 -0800
Subject: Python Modules for Various Internet Protocols?
In-Reply-To: <PLidnd5RcOYwYYDfRVn-3w@adelphia.com>
References: <PLidnd5RcOYwYYDfRVn-3w@adelphia.com>
Message-ID: <1109261801.439345.99120@o13g2000cwo.googlegroups.com>

Efrat Regev wrote:
> Hello,
>
>     I was wondering whether there are any Python modules for various
> Internet protocols, e.g., is there something similar to
>


Erfat...yes...batteries included!

http://docs.python.org/lib/internet.html

Thanks,
-Kartic



From andreas.lobinger at netsurf.de  Tue Feb 22 10:11:21 2005
From: andreas.lobinger at netsurf.de (Andreas Lobinger)
Date: Tue, 22 Feb 2005 16:11:21 +0100
Subject: searching pdf files for certain info
In-Reply-To: <cvfhe5$lcv$1@solaris.cc.vt.edu>
References: <cvfdgg$fr0$1@solaris.cc.vt.edu> <cvfg5a$6g6$1@news.mch.sbs.de>
	<cvfhe5$lcv$1@solaris.cc.vt.edu>
Message-ID: <cvfi2q$dto$1@news.mch.sbs.de>

Aloha,

rbt wrote:
> Thanks guys... what if I convert it to PS via printing it to a file or 
> something? Would that make it easier to work with?

Not really...
The classical PS Drivers (f.e. Acroread4-Unix print-> ps) simply
define the pdf graphics and text operators as PS commands and
copy the pdf content directly.

Wishing a happy day
	LOBI


From fredrik at pythonware.com  Wed Feb 16 02:34:58 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 16 Feb 2005 08:34:58 +0100
Subject: how to import a .py in a parent directory ?
References: <4212878f$0$9483$636a15ce@news.free.fr>
	<4212f304$0$9507$636a15ce@news.free.fr>
Message-ID: <cuusti$j03$1@sea.gmane.org>

Fouff wrote:

> > I know to import a .py in a subdirectory is   :   .  (dot)

(huh?)

> > but what is the statment for parent directory ?
>
> sys.path.append("..")
> import you_python_file_you_want_to_import.py

make that:

    import you_python_file_you_want_to_import

</F> 





From jzgoda at gazeta.usun.pl  Tue Feb 22 15:36:17 2005
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Tue, 22 Feb 2005 21:36:17 +0100
Subject: Problem with minidom and special chars in HTML
In-Reply-To: <421b5b8c$1@news.uni-klu.ac.at>
References: <421b5b8c$1@news.uni-klu.ac.at>
Message-ID: <cvg555$d3a$1@atlantis.news.tpi.pl>

Horst Gutmann napisa?(a):

> I currently have quite a big problem with minidom and special chars (for 
> example &uuml;)  in HTML.
> 
> Let's say I have following input file:
> --------------------------------------------------
> <?xml version="1.0"?>
> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
>             "http://www.w3.org/TR/html4/strict.dtd">

HTML4 is not an XML application. Even if minidom will fetch this DTD and 
be able to parse character entities, it may not be able to parse the 
document.

> Any idea how I could solve this problem?

Don't use minidom or convert HTML4 to XHTML and change declaration of 
doctype.

-- 
Jarek Zgoda
http://jpa.berlios.de/ | http://www.zgodowie.org/


From mahs at telcopartners.com  Thu Feb 17 14:04:31 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 17 Feb 2005 11:04:31 -0800
Subject: Alternative to standard C "for"
In-Reply-To: <1108664521.3892.88.camel@lipscomb.mbi.ucla.edu>
References: <1107628331.816935.16760@o13g2000cwo.googlegroups.com>	<740c3aec050205104924a82d23@mail.gmail.com>	<1108620618.3892.85.camel@lipscomb.mbi.ucla.edu>
	<1108664521.3892.88.camel@lipscomb.mbi.ucla.edu>
Message-ID: <cv2pmi$prl$1@sea.gmane.org>

James Stroud wrote:

> 
> 
> It seems I need constructs like this all of the time
> 
> i = 0
> while i < len(somelist):
>   if oughta_pop_it(somelist[i]):
>     somelist.pop(i)
>   else:
>     i += 1
> 
> There has to be a better way...
> 
Do you have to modify your list in place?

If not, just create a copy with the filtered items:

somelist = [item for item in somelist if not oughta_pop_it(item)]

or you could use filter or itertools.ifilter to do much the same thing

Michael





From aahz at pythoncraft.com  Mon Feb 14 17:47:31 2005
From: aahz at pythoncraft.com (Aahz)
Date: 14 Feb 2005 17:47:31 -0500
Subject: Kill GIL
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<86sm405d38.fsf@guru.mired.org> <cuospv$lfn$1@panix2.panix.com>
	<86y8dqixo6.fsf@guru.mired.org>
Message-ID: <cur9q3$or$1@panix3.panix.com>

In article <86y8dqixo6.fsf at guru.mired.org>, Mike Meyer  <mwm at mired.org> wrote:
>aahz at pythoncraft.com (Aahz) writes:
>>
>> (Have you
>> actually written any threaded applications in Python?)
>
>Yes. Have you ever asked a polite question?

Yes.  I just get a bit irritated with some of the standard lines that
people use.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From tim.peters at gmail.com  Sun Feb  6 12:22:51 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Sun, 6 Feb 2005 12:22:51 -0500
Subject: Insane import behaviour and regrtest.py: heeelp
In-Reply-To: <876515ixj0.fsf@pobox.com>
References: <87sm4aws3v.fsf@pobox.com>
	<mailman.2007.1107659039.22381.python-list@python.org>
	<876515ixj0.fsf@pobox.com>
Message-ID: <1f7befae05020609223c4b2b5d@mail.gmail.com>

[John J. Lee]
> ...
> I tried it, and I get the same results as before (the test modules from my
> installed copy of Python are picked up instead of the local copies in
> my CVS checkout's Lib/test, apparently entirely contrary to sys.path).

Try running Python with -vv (that's two letter "v", not one letter
"w").  That will display a long-winded account of everything Python
tries in order to satisfy an import.


From rkern at ucsd.edu  Fri Feb 11 17:45:09 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Fri, 11 Feb 2005 14:45:09 -0800
Subject: Big development in the GUI realm
In-Reply-To: <pan.2005.02.11.13.12.44.276464@jerf.org>
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<4207c8db$0$21623$a1866201@visi.com>
	<cub12p$pke$1@achot.icm.edu.pl>
	<36sip2F56jjmaU1@individual.net> <umzubw8xg.fsf@vh-s.de>
	<pan.2005.02.11.11.43.56.884015@jerf.org>
	<374826F5851cbU1@individual.net>
	<pan.2005.02.11.13.12.44.276464@jerf.org>
Message-ID: <cujchp$oh7$1@news1.ucsd.edu>

Jeremy Bowers wrote:
> On Fri, 11 Feb 2005 18:24:22 +0100, Damjan wrote:
> 
>>What you described is not ok according to the GPL - since you distributed
>>a binary thats derived from GPL software (and you didn't publish it source
>>code under the GPL too).
> 
> 
> No you didn't. You distributed a binary completely free of any GPL code
> whatsoever. The *user* combined your binary and the GPL to produce another
> binary, which will never be distributed at all.
> 
> In copyright terms, which is what the GPL works under since that is the
> law it has, what you distributed is completely unrelated to the GPL'ed
> program; there's no grounds to call it "derived".

You might be on firmer ground if it were legally clear exactly what 
"derived work" means. Unfortunately, the courts have been skirting 
around the issue of defining "derived work" particularly as it pertains 
to software. It is entirely possible that a judge would conclude that 
your software is a derived work of the GPL software.

Until such matters are unequivocally determined in a court that has 
jurisdiction over you, do you really want to open yourself to legal risk 
and certain ill-will from the community?

I'll reiterate my strategy: follow the intentions of the copyright owner 
unless if I have actual case law on my side.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From jerf at jerf.org  Tue Feb  8 09:02:33 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 08 Feb 2005 09:02:33 -0500
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<4207c8db$0$21623$a1866201@visi.com>
	<cub12p$pke$1@achot.icm.edu.pl>
Message-ID: <pan.2005.02.08.14.02.31.939729@jerf.org>

On Tue, 08 Feb 2005 19:55:01 +0100, Maciej Mr?z wrote:
> Unfortunately, GPL faq is extremely vague on such border cases, instead 
> of simple "yes/no" answers faq is filled with some advocacy talks ...

To re-iterate a point I made on a thread last week, nobody really knows
what the GPL says and means on this topic. We can *barely* outline our
ignorance, but even our ignorance is pretty fuzzy. 

Copyright-based models can't handle modern computer programs, and the GPL
is still copyright-based. As such, it is hosed.

(For an expansion of that idea, see
http://www.jerf.org/writings/communicationEthics/node7.html ; note the
next chapter tries to solve this problem in the context of more
conventional communication, but even with my refinements I'm *still* not
sure how to handle something like the GPL reasonably. I think you'd have
to re-define what the GPL covers almost from scratch; I think it could be
done, but I'm not sure you can fully rationally create an LGPL that
doesn't have critical exceptions.)


From usenet at mail-2-me.com  Thu Feb 10 10:52:46 2005
From: usenet at mail-2-me.com (Dirk Hagemann)
Date: 10 Feb 2005 07:52:46 -0800
Subject: Datatype of non-negative values
References: <a37aa972.0502090551.42319b92@posting.google.com>
	<0q2dnRpPIs3Jo5ffRVn-rw@comcast.com>
Message-ID: <a37aa972.0502100752.6c608b36@posting.google.com>

A result smaller than 0 should be just invalid.

I'd like to work with "try" and "except" like this:
value=20
try:
    value=value-23
except:
    print 'value is smaller than 23'

Now it should run into the "except".

Dirk Hagemann


Larry Bates <lbates at syscononline.com> wrote in message news:<0q2dnRpPIs3Jo5ffRVn-rw at comcast.com>...
> What exactly do you want to happen when result
> would be negative?  I'll guess be zero:
> 
> pseudocode:
> 
> x=value
> x=max(x-something, 0)
> 
> That way if it goes negative, it sticks to zero.
> 
> Larry Bates
> 
> 
> Dirk Hagemann wrote:
> > Hi,
> > 
> > Is there a datatype in python which allows no negative values? I
> > subtract several times something from a value and I don't want to chek
> > everytime if this value is still bigger or equal 0.
> > 
> > Thanks for help!
> > Dirk Hagemann


From jfj at freemail.gr  Thu Feb 10 16:39:16 2005
From: jfj at freemail.gr (jfj)
Date: Thu, 10 Feb 2005 13:39:16 -0800
Subject: A great Alan Kay quote
In-Reply-To: <XL6dnQ1rPechD5ffRVn-uw@powergate.ca>
References: <420a5c1e$0$21630$a1866201@visi.com>
	<XL6dnQ1rPechD5ffRVn-uw@powergate.ca>
Message-ID: <420BD484.9020503@freemail.gr>

Peter Hansen wrote:
> Grant Edwards wrote:
> 
>> In an interview at 
>> http://acmqueue.com/modules.php?name=Content&pa=showpage&pid=273
>> Alan Kay said something I really liked, and I think it applies
>> equally well to Python as well as the languages mentioned:
>>
>>     I characterized one way of looking at languages in this
>>     way: a lot of them are either the agglutination of features
>>     or they're a crystallization of style. Languages such as
>>     APL, Lisp, and Smalltalk are what you might call style
>>     languages, where there's a real center and imputed style to
>>     how you're supposed to do everything.
>>
>> I think that "a crystallization of style" sums things up nicely.
>> The rest of the interview is pretty interesting as well.
> 
> 
> Then Perl is an "agglutination of styles", while Python might
> be considered a "crystallization of features"...

Bah. My impressions from the interview was "there are no good
languages anymore. In my time we made great languages, but today
they all suck. Perl for example...."
I got the impressions that the interview is as bad for python
as for perl and any of the languages of the 90's and 00's.

 From the interview:
""" You could think of it as putting a low-pass filter on some of the 
good ideas from the ?60s and ?70s, as computing spread out much, much 
faster than educating unsophisticated people can happen. In the last 25 
years or so, we actually got something like a pop culture, similar to 
what happened when television came on the scene and some of its 
inventors thought it would be a way of getting Shakespeare to the 
masses. But they forgot that you have to be more sophisticated and have 
more perspective to understand Shakespeare. What television was able to 
do was to capture people as they were.

So I think the lack of a real computer science today, and the lack of 
real software engineering today, is partly due to this pop culture.
"""

So, let's not be so self-important <winkus>, and see this interview
as one who bashes perl and admires python. It aint. Python is pop
culture according to Mr Kay. I'll leave the rest to slashdot..


jfj


From deetsNOSPAM at web.de  Sat Feb 26 13:03:05 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sat, 26 Feb 2005 19:03:05 +0100
Subject: Whither datetime.date ?
References: <pcomztr9pad.fsf@shuttle.math.ntnu.no>
Message-ID: <cvqdkm$eub$05$1@news.t-online.com>

Harald Hanche-Olsen wrote:
> I'm beginning to wonder if the FreeBSD python package is at fault.

Maybe - at my system, it has no Date or DateTime

Python 2.4.1a0 (#2, Feb  9 2005, 12:50:04)
[GCC 3.3.5 (Debian 1:3.3.5-8)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import datetime
>>> dir(datetime)
['MAXYEAR', 'MINYEAR', '__doc__', '__file__', '__name__', 'date',
'datetime', 'datetime_CAPI', 'time', 'timedelta', 'tzinfo']
>>>   


Maybe this is a clash between a custom datetime module and the python one?

What does

python2.4 -v  -c "import datetime"

give you?
-- 
Regards,

Diez B. Roggisch


From tim.peters at gmail.com  Tue Feb  1 13:22:13 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Tue, 1 Feb 2005 13:22:13 -0500
Subject: Where are list methods documented?
In-Reply-To: <41ffc37a$0$15874$a1866201@visi.com>
References: <41ffba7d$0$15879$a1866201@visi.com>
	<mailman.1702.1107279469.22381.python-list@python.org>
	<41ffc37a$0$15874$a1866201@visi.com>
Message-ID: <1f7befae05020110222aa1daaa@mail.gmail.com>

[Tim Peters]
>> You could have found the above by, e.g., looking up "sort" in the
>> Library manual's index.

[Grant Edwards]
> I did.  I looked up sort in the library index, and it took me
> to 3.3.5 Emulating container types,

It doesn't for me.  Here:

    http://docs.python.org/lib/genindex.html#letter-s

There are two entries for "sort":

    sort (IMAP4_stream method)
    sort (list method)

You're looking for the second one <wink>.

...
> 
> I don't think it's at all obvious that the documentation for
> list.sort would be under "mutable sequence object".

I was just answering your question ("where are the docs?"), not trying
to imply you were an idiot for not guessing that.

You could have gotten to the same place in several ways.  Another
would have been to look up "list" in the Library index, and click on

    list
        type, operations on

For good or ill, the Library manual takes a rather abstract view of
the types currently implemented, as reflected in its table of
contents:

2. Built-In Objects 
    2.1 Built-in Functions 
    2.2 Non-essential Built-in Functions 
    2.3 Built-in Types 
        2.3.1 Truth Value Testing 
        2.3.2 Boolean Operations 
        2.3.3 Comparisons 
        2.3.4 Numeric Types 
        2.3.5 Iterator Types 
        2.3.6 Sequence Types 
        2.3.7 Set Types 
        2.3.8 Mapping Types 
        2.3.9 File Objects 
        2.3.10 Other Built-in Types 
        2.3.11 Special Attributes 
    2.4 Built-in Exceptions 
    2.5 Built-in Constants

So, e.g., it doesn't mention floats or dicts by those names either. 
It's well worthwhile to spend some time browsing that entire chapter.


From kent37 at tds.net  Thu Feb 10 15:43:23 2005
From: kent37 at tds.net (Kent Johnson)
Date: Thu, 10 Feb 2005 15:43:23 -0500
Subject: Name of type of object
In-Reply-To: <420A8774.638D88E8@yahoo.com>
References: <4209A52C.A1C40311@yahoo.com> <bEiOd.83727$Tf5.12604@lakeread03>
	<J8adnUGW461nV5TfRVn-rA@comcast.com>
	<36uo36F54okd6U1@individual.net> <420A8774.638D88E8@yahoo.com>
Message-ID: <420bc492$1_2@newspeer2.tds.net>

Jive Dadson wrote:
> I don't think I've quite got it.
> 
> The application I'm writing has some similarities to an interactive
> shell.  Like an interactive shell, it executes arbitrary code that it
> receives from an input stream.  When it gets an exception, it should
> create an informative message, regardless of the type of exception.  The
> traceback routine does that, somehow, some way, but I've tried to read
> that code and figure out how and I don't get it.
> 
> The best I have so far is,
> 
> class Exec_thread(BG_thread):
> 	""" Execute a line of code in the global namespace. """
> 	def _process(s):
> 		""" Process one instruction """
> 		try:
> 			exec s.product in globals()
> 		except (Exception), e:
> 			handle_error( typename(e)+ ": " + str(e) )

Have you looked at the traceback module? If you want to print the same kind of trace you get from 
Python, just use traceback.print_exc().

import traceback
try:
   # whatever
except:
   traceback.print_exc()

Kent

> 
> 
> But that works only if the exception happens to be derived from
> Exception.  How do I handle the
> general case?


From steven.bethard at gmail.com  Thu Feb  3 18:34:47 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 03 Feb 2005 16:34:47 -0700
Subject: About standard library improvement
In-Reply-To: <qUxMd.3494$4D3.485@news02.roc.ny>
References: <mailman.1831.1107455790.22381.python-list@python.org>
	<4kuMd.102708$Jk5.100022@lakeread01>
	<mailman.1849.1107470297.22381.python-list@python.org>
	<qUxMd.3494$4D3.485@news02.roc.ny>
Message-ID: <baOdnd7ClJKIKJ_fRVn-hg@comcast.com>

Lee Harr wrote:
> On 2005-02-03, BJ?rn Lindqvist <bjourne at gmail.com> wrote:
> 
>>The process seem slow. I've submitted two patches and haven't gotten
>>any response so far, but it has only been three weeks. Other patches
>>seem to be idling for months. I'm not complaining, just want to know
>>why the process is so slow and what you can do when you submit
>>patches/bug reports to speed it up?
> 
> I am certainly no expert, but I follow the lists. I recall
> reading something recently that a lot of the logjam is the
> need for people to look over other patches that have been
> submitted. Something along the lines of ... if everyone
> who submits a patch will just go through and check over
> 10 other patches we will have this backup sorted quickly.

Yeah, a few of the python-devvers have agreed to this setup.  And the 
patch count has been lowered to 5.  So if you really want to get your 
patch reviewed, find 5 patches, look them over, test them out, and then 
post your recommendations on how these patches should be handled to 
python-dev.  Then point them to the patch you'd like reviewed, and when 
the generous python-devvers who have agreed to this setup get a chance, 
they will review your patch.

STeVe


From fuzzyman at gmail.com  Thu Feb 17 09:15:05 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 17 Feb 2005 06:15:05 -0800
Subject: [newbie]How to install python under DOS and is there any
	Wxpython can be installed under dos?
In-Reply-To: <l4OdneC_7ZH2oInfRVn-3A@rogers.com>
References: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
	<1108557065.547230.254540@z14g2000cwz.googlegroups.com>
	<b9-dnTQOwoYK647fRVn-2Q@rogers.com>
	<11172sa1sg2svc8@corp.supernews.com>
	<l4OdneC_7ZH2oInfRVn-3A@rogers.com>
Message-ID: <1108649705.442893.278840@g14g2000cwa.googlegroups.com>


john san wrote:
> Actually the "windows" running very good under the xbox-NTOS via
> xboxmediacenter. its just limited functions(not easy to programming
the
> "windows" prog.), if we can find WxPython-like can be ported (I can
import *
> from it  to my xboxPython) )it will be a great great ......... You
will have
> HD screen and web surfing on HDTV and computing on HDTV. think about
it!
> That is a real thing the python-like lang. should to do otherwise
just a
> garbage(toy).
>
>
>

I assume you mean that without python the Xbox is just a toy......

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From administrata at hotmail.com  Thu Feb 10 12:38:41 2005
From: administrata at hotmail.com (administrata)
Date: 10 Feb 2005 09:38:41 -0800
Subject: [N00B] What's %?
Message-ID: <614c778e.0502100938.6665cb52@posting.google.com>

Hi! it's been about a week learning python!
I've read 'python programming for the absolute begginer'
I don't understand about % like...

107 % 4 = 3
7 % 3 = 1

I'm confused with division :/
Please help me...

thx 4 reading.


From bvande at po-box.mcgill.ca  Mon Feb  7 12:11:50 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Mon, 07 Feb 2005 12:11:50 -0500
Subject: RESOLVED broke IDLE while defining a key-binding scheme
In-Reply-To: <42043BCB.9090902@po-box.mcgill.ca>
References: <42043BCB.9090902@po-box.mcgill.ca>
Message-ID: <4207A156.6070909@po-box.mcgill.ca>

Brian van den Broek said unto the world upon 2005-02-04 22:21:
> Hi all,
> 
> IDLE refuses to launch, and I believe it is because I attempted to 
> define a custom key-binding that it doesn't like.

<SNIP>

> shortcuts, etc.) by clicking on it. Nothing. Ran idle.py instead 
 > <of idle.pyw>. The DOS-console this brings up displays:
> 
> Traceback (most recent call last):
<SNIP>
>   File "C:\PYTHON24\lib\lib-tk\Tkinter.py", line 1299, in event_add
>     self.tk.call(args)
> _tkinter.TclError: bad event type or keysym "tab"
>  >>>
<SNIP>

For future googler's and to stave off any unnecessary replies, on a 
different thread about IDLE problems <http://tinyurl.com/4bl45> Peter 
Otten posted the information that allowed me to resolve this. (It was 
a matter of finding the custom key-binding that I'd defined which made 
IDLE choke and removing it.)

So, thanks Peter!

Best to all,

Brian vdB



From bjourne at gmail.com  Fri Feb 11 06:39:07 2005
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Fri, 11 Feb 2005 12:39:07 +0100
Subject: Unit Testing in Python
In-Reply-To: <1108087841.271630.228970@o13g2000cwo.googlegroups.com>
References: <1108087841.271630.228970@o13g2000cwo.googlegroups.com>
Message-ID: <740c3aec050211033959897e02@mail.gmail.com>

> put it) PyUnit project. I'm sorry if this is a obvious question or one
> that has already been answered, but unit-testing sounds interesting and
> I'm not sure where to start.

Hi Ryan. I belive this (http://www.xp123.com/xplor/xp0201/index.shtml)
is a good way to learn about unit testing by practice if you already
know the basics of it. It is written in Java but is easy to translate
to Python. Unittesting really is great in Python, I try to use it for
anything but simple and dirty hacks.

-- 
mvh Bj?rn


From evenprimes at gmail.com  Wed Feb 16 10:13:52 2005
From: evenprimes at gmail.com (Chris Cioffi)
Date: Wed, 16 Feb 2005 10:13:52 -0500
Subject: Test for structure
In-Reply-To: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
References: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
Message-ID: <f03f4fdf05021607131215acf4@mail.gmail.com>

Perhaps you're looking for the type() built in function and the types modules?

>>> type('aaa')
<type 'str'>
>>> type([])
<type 'list'>
>>> import types
>>> if type([]) is types.ListType:
... 	print 'is a list'
... 	
is a list

Chris

On Wed, 16 Feb 2005 07:10:56 -0800 (PST), alex
<alexander.dietz at mpi-hd.mpg.de> wrote:
> Hi there,
> 
> how can I check if a variable is a structure (i.e. a list)? For my
> special problem the variable is either a character string OR a list of
> character strings line ['word1', 'word2',...]
> 
> So how can I test if a variable 'a' is either a single character string
> or a list? I tried:
> 
> if a is list:
> 
> but that does not work. I also looked in the tutorial and used google
> to find an answer, but I did not.
> 
> Has anyone an idea about that?
> 
> Alex
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
"It is our responsibilities, not ourselves, that we should take
seriously." -- Peter Ustinov


From ajsiegel at optonline.com  Tue Feb  1 06:27:24 2005
From: ajsiegel at optonline.com (Arthur)
Date: Tue, 01 Feb 2005 06:27:24 -0500
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<1107188359.375703.110590@f14g2000cwb.googlegroups.com>
	<1gr9lyc.1rrm543162uefN%aleaxit@yahoo.com>
	<1107229287.315380.222790@c13g2000cwb.googlegroups.com>
Message-ID: <97puv0hgnav7gehhier7bbd831202cfg86@4ax.com>

On 31 Jan 2005 19:41:27 -0800, "Michael Tobis" <mt at 3planes.com> wrote:

>> You may call it a strawberry, if you wish, but that doesn't mean it
>will
>> taste good with fresh cream.  It's nothing more and nothing less than
>an
>> arguably weird syntax for a perfectly executable statement:
>
>This may well be true in implementation, but cognitively it is a
>declaration that modifies the reference and not the referent. I see
>that it is a big deal to ask for more of these, but I don't see why.

Thank you for bringing it and respecting the cognitive factor.  My
"expereince* of the decorator, disassembly of internals quite aside,
is that it breaks old rules - or, if prferred, breaks new ground -  by
impacting code one wouildn't expect it to kow about.

It frightens me a bit when the road to Guru seems to move in the
direction of most completely transcending the normal user experience,
rather than in best comprehending it.

Art



From simoninusa2001 at yahoo.co.uk  Thu Feb 10 14:51:39 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 10 Feb 2005 11:51:39 -0800
Subject: PyQt and Python 2.4 - also WinXP LnF?
References: <1108003471.242829.297030@o13g2000cwo.googlegroups.com>
	<mailman.2295.1108027117.22381.python-list@python.org>
Message-ID: <1108065099.593832.314470@f14g2000cwb.googlegroups.com>

I've just read the Qt4 GPL for Windows will only support gcc (and maybe
MinGW) anyway, not BCC or VisualC++ (or it's free equivalents), so it
looks like it would be a daunting task to actually build PyQt....

See http://osnews.com/comment.php?news_id=9675

I guess the Qt used in PyQt from BlackAdder just wasn't built with XP
support, and if I can't use it to compile PyQt properly, then it's
worthless to me.

I guess a lot of this licensing crap will change when Qt4 GPL is
actually released, but it's still looking like commercial Qt is the
only "easy" way to go, and the Trolls are just making a "difficult" GPL
version to shut people up!



From Michael.Lang at jackal-net.at  Tue Feb 15 12:54:43 2005
From: Michael.Lang at jackal-net.at (Michael Lang)
Date: Tue, 15 Feb 2005 17:54:43 +0000 (UTC)
Subject: Postgres COPY Command with python 2.3 pg
Message-ID: <slrnd14dni.2bu.michi@michi.si.eunet.at>

Hi to all,

can some one point me to the correct way, how to use PostgreSQLs "COPY" feature
from within python ?

What i want to do is:

	connect
	 start transaction
 	  drop current tablecontens
          copy new content from STDIN  # file need more privileged user rights
	 commit transaction

using psql it works fine, but i dont know how to get it working in python.
Ive already made the calls but the changes never apper, and no error.
my suggestion was, that "db.query("input|input|input") doesnt work as STDIN for
the Database, and i tryed db.putline(....) but no success.

Kind regards for any help
Michael Lang



From fredrik at pythonware.com  Mon Feb 14 12:34:18 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 18:34:18 +0100
Subject: [newbie] - How to remain at prompt after script execution?
References: <DZ4Qd.1411$UN1.71@news.itd.umich.edu>
Message-ID: <cuqn9p$b1a$1@sea.gmane.org>

Amit Dhingra wrote:

> I would like to excute a script and upon completion, how can I just a python
> prompt with the functions and variables already defined.
>
> I know you can do this in the window gui(IDLE). I was wondering if this can
> be done in POSIX systems as well.

does "python -i" do what you want?

$ python -h
usage: python [option] ... [-c cmd | -m mod | file | -] [arg] ...
Options and arguments (and corresponding environment variables):
-c cmd : program passed in as string (terminates option list)
-d     : debug output from parser (also PYTHONDEBUG=x)
-E     : ignore environment variables (such as PYTHONPATH)
-h     : print this help message and exit
-i     : inspect interactively after running script, (also PYTHONINSPECT=x)
         and force prompts, even if stdin does not appear to be a terminal
...

$ more myprogram.py
message = "hello, world"
print messae
$ python -i myprogram.py
hello, world
>>> print message.upper()
HELLO, WORLD

</F> 





From deetsNOSPAM at web.de  Sun Feb  6 16:04:28 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sun, 06 Feb 2005 22:04:28 +0100
Subject: Confused with methods
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<TL-dneoHycPA35vfRVn-qQ@rogers.com>
	<mailman.2027.1107713399.22381.python-list@python.org>
Message-ID: <cu60os$1cg$05$1@news.t-online.com>

> I expected that when we add this "x" to a class's dictionary and
> then we request it from an instance of that class, it will be
> converted to an bound-method and receive its --one-- argument
> from the referring instance.

Here you are wrong: your b.foo is a bound method - it already _has_ its
first argument (an instance of B) bound to it. And just passing it around
doesn't change that. You can assign it to a name in whatever scope you like
- that won't change its nature.

Now if you want to use foo in A as instancemethod, you could do this:

A.foo = b.foo.im_func
a = A()
a.foo(200)


That works because im_func is a "pure" function:

>>> B.foo.im_func
<function foo at 0xb7ac47d4>


If things worked as you wanted it to, that would mean that passing a bound
method as argument to a class and storing it there to a instance variable
that would "eat up" the arguments - surely not the desired behaviour.
-- 
Regards,

Diez B. Roggisch


From mahs at telcopartners.com  Thu Feb  3 17:55:13 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 03 Feb 2005 14:55:13 -0800
Subject: List mapping question
In-Reply-To: <g-mdnXrKqZd2Ap_fRVn-rw@midcoast.com>
References: <g-mdnXrKqZd2Ap_fRVn-rw@midcoast.com>
Message-ID: <ctu9v9$ib7$1@sea.gmane.org>

Marc Huffnagle wrote:
> I have a number of variables that I want to modify (a bunch of strings 
> that I need to convert into ints).  Is there an easy way to do that 
> other than saying:
> 
>  > a = int(a)
>  > b = int(b)
>  > c = int(c)

It may not matter to you, at the moment, but a = int(a) is not strictly 
'modifying a variable'.  Instead int(a) creates a new int object, if possible, 
from the object that a is currently bound to.  Then a is rebound to the new object.

> 
> I tried
> 
>  > [i = int(i) for i in [a, b, c]]

You can't make an assignment in a list comprehension.  If your 'variables' are 
object attributes, you could do: [setattr(obj,name,int(getattr(obj,name)) for 
name in [list of attribute names]]


> 
> but that didn't work because it was creating a list with the values of 
> a, b and c instead of the actual variables themselves, then trying to 
> set a string equal to an integer, which it really didn't like.
> 
>      Marc

For your problem as stated:

 >>> a=b=c="1"
 >>> for var in ["a","b","c"]:
...     exec "%s = int(%s)" % (var,var)
...
 >>> a,b,c
(1, 1, 1)
 >>>

But don't do this, except as a "one-off" data crunching exercise

Michael




From snmartin at galilea.cl  Thu Feb 10 08:30:00 2005
From: snmartin at galilea.cl (Fernando San =?ISO-8859-1?Q?Mart=EDn?= Woerner)
Date: Thu, 10 Feb 2005 10:30:00 -0300
Subject: pyclbr
Message-ID: <1108042200.7977.5.camel@localhost.localdomain>

Hi guys!

i'm using pycblr to implement a class browser for my app, i got some
issues about it:

i did:

dict = pyclbr.readmodule(name, [dir] + sys.path)

but  this only works one time, i mean if module "name" is changed and
some class were added or removed i can't see any changes even if i
execute readmodule again.

any idea?, thanks in advance


-- 
Fernando San Mart?n Woerner
Jefe de Inform?tica
Galilea S.A.



From duncan.booth at invalid.invalid  Mon Feb  7 10:53:43 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 7 Feb 2005 15:53:43 GMT
Subject: xmlentities
References: <66dkd2-6f2.ln1@pluto.i.infosense.no>
Message-ID: <Xns95F6A18B5735Dduncanrcpcouk@127.0.0.1>

Ola Natvig wrote:

> Does anyone know a good library for transfering non standard characters 
> to enity characters in html. I want characters like < and > to be 
> transformed to &lt; and &gt;. And the norwegian ? to &oslash;
> 

You could use cgi.escape to handle &, <, and > and then use error handling 
on unicode.encode to handle the other characters. That doesn't do quite 
what you ask since your ? will become &#248:

>>> s = u'<?>'
>>> cgi.escape(s).encode('ascii', 'xmlcharrefreplace')
'&lt;&#248;&gt;'


If you really want named entities, then have a look at 
lib/test/test_codeccallbacks which has a test called 
test_xmlcharnamereplace that registers another codec error handler 
'test.xmlcharnamereplace'. I think you could probably extract that and use 
it as above.


From duncan.booth at invalid.invalid  Fri Feb 25 10:30:35 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 25 Feb 2005 15:30:35 GMT
Subject: split a directory string into a list
References: <4D97153E7D88F44FB6B534C661EE42900300A89C@medexch1.medplus.com>
	<mailman.3048.1109342286.22381.python-list@python.org>
Message-ID: <Xns96089DC274CF8duncanrcpcouk@127.0.0.1>

Michael Maibaum wrote:

> On 25 Feb 2005, at 14:09, Harper, Gina wrote:
> 
>> I would start with something like this:
>> somestring = '/foo/bar/beer/sex/cigarettes/drugs/alcohol/'
>> somelist = somestring.split('/')
>> print somelist
> 
> However - this will not work on Windows. It'd work on all the OS I 
> usually use though ;)
> 

This should work reasonably reliably on Windows and Unix:

>>> somestring = '/foo/bar/beer/sex/cigarettes/drugs/alcohol/'
>>> os.path.normpath(somestring).split(os.path.sep)
['', 'foo', 'bar', 'beer', 'sex', 'cigarettes', 'drugs', 'alcohol']

However a better solution is probably to call os.path.split repeatedly 
until it won't split anything more:

>>> somestring = r'C:\foo\bar\beer'
>>> def splitpath(p):
	res = []
	while 1:
		p, file = os.path.split(p)
		if not file:
			break
		res.append(file)
	res.append(p)
	res.reverse()
	return res

>>> splitpath(somestring)
['C:\\', 'foo', 'bar', 'beer']
>>> splitpath('foo/bar')
['', 'foo', 'bar']

The first component is an empty string for relative paths, a drive letter 
or \ for absolute Windows paths, \\ for UNC paths, / for unix absolute 
paths.


From michele.simionato at gmail.com  Fri Feb 25 06:34:47 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 25 Feb 2005 03:34:47 -0800
Subject: web status display for long running program
In-Reply-To: <509534af.0502241737.5f62992@posting.google.com>
References: <509534af.0502241737.5f62992@posting.google.com>
Message-ID: <1109331287.500811.226610@l41g2000cwc.googlegroups.com>

This is fun, so I will give my solution too (of course,
the effort here is to give the shortest solution, not the
more robust solution ;).

This is the server program, which just counts forever:

from threading import Thread
from CGIHTTPServer import test
import os

class Counter(Thread):
    def run(self):
        n = 0
        self.loop = True
        while self.loop:
            n += 1
            os.environ["COUNTER"] = str(n)
    def stop(self):
        self.loop = False


if __name__ == "__main__":
    counter = Counter()
    counter.start()
    try:
        test()
    finally: # for instance, if CTRL-C is called
        counter.stop()

And this is the CGI viewer:

#!/usr/bin/python
import os
print "Content-type: text/plain\n"
print "Counter: %s" % os.environ["COUNTER"]

Pretty bare-bone ;)

             Michele Simionato



From dbickett at gmail.com  Sat Feb  5 13:55:24 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Sat, 5 Feb 2005 13:55:24 -0500
Subject: Alternative to standard C "for"
In-Reply-To: <7xu0oqlubu.fsf@ruckus.brouhaha.com>
References: <1107628331.816935.16760@o13g2000cwo.googlegroups.com>
	<7xu0oqlubu.fsf@ruckus.brouhaha.com>
Message-ID: <1d6cdae305020510552b9b5325@mail.gmail.com>

Paul Rubin wrote:
> use xrange instead of range.

Woops ;) I wasn't aware such a function existed.

apologies-for-reinventing-the-wheel-ly y'rs,
-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From rschroev_nospam_ml at fastmail.fm  Sun Feb 13 00:32:43 2005
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sun, 13 Feb 2005 05:32:43 GMT
Subject: For American numbers
In-Reply-To: <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
References: <420e7376$1@nntp0.pdx.net> <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
Message-ID: <%DBPd.10409$Lf6.440348@phobos.telenet-ops.be>

Peter Hansen wrote:
> Scott David Daniels wrote:
> 
>> Kind of fun exercise (no good for British English).
>>
>>     def units(value, units='bytes'):
>>         magnitude = abs(value)
>>         if magnitude >= 1000:
>>             for prefix in ['kilo mega giga tera peta '
>>                            'exa zetta yotta').split():
>>                 magnitude /= 1000.
>>                 if magnitude < 1000.:
>>                     break
> 
> 
> Only for hard drive manufacturers, perhaps.

And physicists and chemists and engineers and all other kinds of 
scientists all over the world. Plus those of us in the computer world 
who agree that 'kilo == 1024' is an abomination that should never have 
existed and which we should get rid of as fast as possible.

As fast as possible is not very fast, unfortunately.

-- 
"Codito ergo sum"
Roel Schroeven


From jstroud at mbi.ucla.edu  Mon Feb 28 18:56:39 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 28 Feb 2005 15:56:39 -0800
Subject: Scoping issue with import
Message-ID: <200502281556.39680.jstroud@mbi.ucla.edu>

Say I have a module, we'll call it "my_imported_mod". It contains a function 
in it that calls another function, "myfun". The "myfun" function is in the 
module "my_main_mod", that imports "my_imported_mod".

The code of "my_main_mod" might look like this:
==============
from my_imported_mod import *

def myfun():
  print "stuff"
==============

the code of "my_imported_mod" might look like this:
==============
def somefun():
  myfun()
==============

When trying to execute the function somefun(), I get a
NameError: global name 'myfun' is not defined

How to rectify this with minimal code change? How to let imported modules know 
about the namespace they are getting imported into? I do not want to 
restructure my code right now.

Thanks in advance for help.

James


From wweston at att.net  Tue Feb  8 13:03:11 2005
From: wweston at att.net (wes weston)
Date: Tue, 08 Feb 2005 18:03:11 GMT
Subject: broke tkinter
In-Reply-To: <mailman.2200.1107881733.22381.python-list@python.org>
References: <mailman.2200.1107881733.22381.python-list@python.org>
Message-ID: <z97Od.174038$w62.43711@bgtnsc05-news.ops.worldnet.att.net>

Philippe C. Martin wrote:
> Hi,
> 
> I decided to clean my system and rebuild python from scratch.
> 
> I downloaded tk8.4.9, tcl8.4.9 and Python2-4.tar.bz2.
> 
> I installed tcl then tk using './configure --prefix=/usr'
> 
> tkcvs is now working OK
> 
> 
> trying to compile python (configure = './configure --prefix=/usr', I get
> this:
> 
> 
> In file included
> from /home/philippe/downloaded/Python-2.4/Modules/_tkinter.c:67:
> /usr/include/tk.h:337: error: syntax error before "CONST84"
> In file included from /usr/include/tk.h:1576,
> 
> from /home/philippe/downloaded/Python-2.4/Modules/_tkinter.c:67:
> 
> Any clue!
> 
> Regards,
> 
> Philippe
> 
> 
Phillipp,
    Might you be getting the wrong header file/tk version?

http://wiki.tcl.tk/3669  talks about it.

wes



From aleaxit at yahoo.com  Fri Feb  4 13:02:55 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Fri, 4 Feb 2005 19:02:55 +0100
Subject: returning True, False or None
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
Message-ID: <1grh3fe.1km48v56sadeyN%aleaxit@yahoo.com>

Steven Bethard <steven.bethard at gmail.com> wrote:

> I have lists containing values that are all either True, False or None,
> e.g.:
> 
>      [True,  None,  None,  False]
>      [None,  False, False, None ]
>      [False, True,  True,  True ]
>      etc.
> 
> For a given list:
> * If all values are None, the function should return None.
> * If at least one value is True, the function should return True.
> * Otherwise, the function should return False.
> 
> Right now, my code looks like:
> 
>      if True in lst:
>          return True
>      elif False in lst:
>          return False
>      else:
>          return None
> 
> This has a light code smell for me though -- can anyone see a simpler
> way of writing this?

What about...:

for val in lst:
    if val is not None:
        return val
return None

or the somewhat fancy/clever:

for val in (x for x in lst if x is not None):
    return val
return None


Alex


From lee at example.com  Sat Feb 26 08:18:41 2005
From: lee at example.com (Lee Harr)
Date: Sat, 26 Feb 2005 13:18:41 GMT
Subject: possible python/linux/gnome issue!!
References: <mailman.3073.1109376619.22381.python-list@python.org>
Message-ID: <RG_Td.10664$1C.4@news02.roc.ny>

On 2005-02-26, bruce <bedouglas at earthlink.net> wrote:
> hi...
>
> i'm running rh8.0 with gnome.. i'm not sure of the version (it's whatever rh
> shipped).
>
> i've recently updated (or tried to update) python to the latest version.
> when i try to run the 'Server Settings/Services' Icon within gnome, nothing
> happens...
>
> i tried to run the 'start services' command from a command line, and got the
> following...
>
> it appears to be a conflict somewhere...
>
> --------------------------------------------------------
> [root at lserver2 bin]# redhat-config-services
> /usr/share/redhat-config-services/serviceconf.py:331: SyntaxWarning:
> argument named None
>   def on_mnuRescan_activate(self,None):

I don't think this has ever been legal... so that's strange.


>     import gtk
> ImportError: No module named gtk

Which version of python were you using before?
Is it still installed?
Try something like ...

ls -l /usr/bin/python*


> can someone perhaps suggest a solution, or point me to where i might find a
> solution to this issue. could the python changes be causing a problem? would
> upgrading gnome potentially fix the issue? can you upgrade gnome without
> upgrading the rh kernel?
>

You can try pointing /usr/bin/python (which on many systems
is just a link to the actual program) to the old version
of python.

This is really more of a red hat question than a python
question, so I also recommend asking on a red hat list.


From mahs at telcopartners.com  Sat Feb  5 15:23:31 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sat, 05 Feb 2005 12:23:31 -0800
Subject: empty classes as c structs?
In-Reply-To: <1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<7rSdne7BcbDeV57fRVn-jg@comcast.com>	<mailman.1963.1107594941.22381.python-list@python.org>
	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>
Message-ID: <cu39pl$t69$1@sea.gmane.org>

Alex Martelli wrote:
> Nick Coghlan <ncoghlan at iinet.net.au> wrote:
>    ...
> 
>>Michael Spencer also posted ...
> 
> Wasted indirection, IMHO.  A better implementation:
> 
> class attr_view(object):
>     def __init__(self, data):
>         self.__dict__ = data
> 
> 
> Alex

Indeed!  A complete brain-blip


Michael



From deetsNOSPAM at web.de  Sun Feb 13 05:44:11 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sun, 13 Feb 2005 11:44:11 +0100
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
References: <ctsjmg$75p$1@usenet.otenet.gr> <cukut2$94s$1@usenet.otenet.gr>
	<s%uPd.107074$Jk5.8822@lakeread01>
Message-ID: <cunb1r$hns$05$1@news.t-online.com>

> If this is "goodbye" I can't say I'm sorry.

Don't feed the trolls - as tempting as it is....
-- 
Regards,

Diez B. Roggisch


From ville at spammers.com  Wed Feb 23 08:43:47 2005
From: ville at spammers.com (Ville Vainio)
Date: 23 Feb 2005 15:43:47 +0200
Subject: Attaching to a Python Interpreter a la Tcl
References: <1109155068.468295.121630@f14g2000cwb.googlegroups.com>
	<1109162760.147702.326770@o13g2000cwo.googlegroups.com>
Message-ID: <du7is4jpf1o.fsf@lehtori.cc.tut.fi>

>>>>> "fuzzyman" == Fuzzyman  <fuzzyman at gmail.com> writes:

    fuzzyman> Do you mean making the interpreter available from within
    fuzzyman> a Python app ?  There are various ways of doing that -
    fuzzyman> you can see the SPE editor which uses pycrust as one
    fuzzyman> example. http://spe.pycs.net

I believe he means embedding he interpreter in his app, then accessing
the interpreter from another process - so you could change and view
global vars of the running process from the interpreter, for
example. This basically means redirecting i/o of the interpreter to a
socket to which you connect via, say, telnet. There are libs that do
such a thing, I even remember trying one out myself, but I couldn't
find it quickly enough from google.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From deetsNOSPAM at web.de  Fri Feb 18 13:35:24 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 18 Feb 2005 19:35:24 +0100
Subject: re.compile and very specific searches
References: <cv5ba4$nvn$1@solaris.cc.vt.edu>
Message-ID: <cv5chc$k27$01$1@news.t-online.com>

rbt wrote:

> Is it possible to use re.compile to exclude certain numbers? For
> example, this will find IP addresses:
> 
> ip = re.compile('\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}')
> 
> But it will also find 999.999.999.999 (something which could not
> possibly be an IPv4 address). Can re.compile be configured to filter
> results like this out?

You could use another regular expressin, e.g. like this:

import re

rex = re.compile(r"^((\d)|(1\d{1,2})|(2[0-5]\d))$") 

for i in xrange(1000):
    m = rex.match(str(i))
    if m:
        print m.groups(), i


This is of course only for one number. Extend it accordingly to the ip4
address format.

However, you won't be able to suppress the matching of e.g. 259 by that
regular expression. So I'd suggest you dump re and do it like this:

address = "192.168.1.1"

def validate_ip4(address):
    digits = address.split(".")
    if len(digits) == 4:
        for d in digits:
            if int(d) < 0 or int(d) > 255:
                  return False
    return True

-- 
Regards,

Diez B. Roggisch


From mblume at socha.net  Fri Feb  4 05:32:02 2005
From: mblume at socha.net (Martin Blume)
Date: Fri, 4 Feb 2005 11:32:02 +0100
Subject: continuous plotting with Tkinter
References: <42010f48$0$3408$5402220f@news.sunrise.ch>
	<ctu1cc$3bt$1@gnus01.u.washington.edu>
Message-ID: <42034f22$0$3407$5402220f@news.sunrise.ch>

"Russell E. Owen" schrieb
>
> >I have a number-crunching application that spits out
> >a lot of numbers. Now I'd like to pipe this into a
> >python app and plot them using Tkinter, such as:
> >$ number_cruncher | myplot.py
> >But with Tkinter once  I call Tkinter's mainloop() I
> >give up my control of the app and I can't continue to
> >read in data from stdin.  Or can I? If so, how?
>
> One way is to use a thread to read the numbers, then
> make them available to the main thread via a Queue
> object, which you poll for new values.
>
I already tinkered with threads, yet it didn't work.
I'll try again.

>
> Another option is to use a Tk-compatible file or socket
> of some kind which triggers a callback when data comes
> in. See
>
>htttp://www.astro.washington.edu/rowen/TkinterSummary.html#FileHand
lers>

> some ideas on this.
>
Thanks, I'll look.

Martin




From administrata at hotmail.com  Wed Feb 16 04:34:45 2005
From: administrata at hotmail.com (administrata)
Date: 16 Feb 2005 01:34:45 -0800
Subject: Variables.
References: <614c778e.0502150429.1a2a4d8d@posting.google.com>
Message-ID: <614c778e.0502160134.6bd72448@posting.google.com>

sry, I mean the problem is... about lining

it doesn't look like this...

Allen woke up early in the morning. But, it was unusal by Allen.
Allen's pillow was with Allen. Allen didn't want to wake up But, Allen
tried my best and woke up. it was so amazing


From jtp11 at att.net  Tue Feb  8 14:29:55 2005
From: jtp11 at att.net (Jim)
Date: 8 Feb 2005 11:29:55 -0800
Subject: Loop in list.
In-Reply-To: <36s2b2F53f67pU1@individual.net>
References: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
	<36s2b2F53f67pU1@individual.net>
Message-ID: <1107890995.922231.193960@g14g2000cwa.googlegroups.com>

Thanks for the help.  Python is somewhat ?mysterious to an old fortan
programer.

Jim



From administrata at hotmail.com  Tue Feb 15 07:29:26 2005
From: administrata at hotmail.com (administrata)
Date: 15 Feb 2005 04:29:26 -0800
Subject: Variables.
Message-ID: <614c778e.0502150429.1a2a4d8d@posting.google.com>

I wrote this, It's a bit lame though

I = "Allen"
me = "Allen"
my = "Allen's"

print \
"""
%s woke up early in the morning. But, it was unusal by %s. %s pillow
was with %s. %s didn't want to wake up But, %s tried my best and woke up.
it was so amazing!""" % (I,me,my,me,I,I)

raw_input("\n\\t\t\t- The End -")

But it looks like this...

Allen woke up early in the morning. But, it was unusal by Allen. 
Allen's pillow
was with Allen. Allen didn't want to wake up But, Allen tried my best and woke up.
it was so amazing

                            - The End -

HELP plz


From administrata at hotmail.com  Sat Feb  5 07:02:01 2005
From: administrata at hotmail.com (administrata)
Date: 5 Feb 2005 04:02:01 -0800
Subject: Error!
References: <614c778e.0502041459.39da55c1@posting.google.com>
	<1107563070.861085.180680@g14g2000cwa.googlegroups.com>
Message-ID: <614c778e.0502050402.4c6f46eb@posting.google.com>

"John Machin" <sjmachin at lexicon.net> wrote in message news:<1107563070.861085.180680 at g14g2000cwa.googlegroups.com>...
> administrata wrote:
> > I'm programming Car Salesman Program.
> > It's been "3 days" learning python...
> 
> >From whom or what book or what tutorial?
> 
> > But, i got problem
> 
> You got problemS. What Jeff & Brian wrote, plus:
> 
> You have "change" instead of "charge".
> 
> You forgot to add in the base price -- "actual price" according to you
> comprises only the taxes and fees. Where is your car yard? We'd each
> like to order a nice shiny red Ferrari :-)
> 
> Cheers,
> John

erm... sry i don't get it :\

can you modify actual_price?

actual_price = (((base_price * tax / 100) + license1 / 100) + dealer +
charge


From adam at gliwice.pl  Mon Feb  7 07:41:12 2005
From: adam at gliwice.pl (Adam Przybyla)
Date: Mon, 7 Feb 2005 12:41:12 +0000 (UTC)
Subject: "Collapsing" a list into a list of changes
References: <dvOMd.33656$EG1.19314@lakeread04>
Message-ID: <cu7nl8$klc$1@atlantis.news.tpi.pl>

Alan McIntyre <alan.mcintyre at esrgtech.com> wrote:
> Hi all,
> 
> I have a list of items that has contiguous repetitions of values, but 
> the number and location of the repetitions is not important, so I just 
> need to strip them out.  For example, if my original list is 
> [0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5], I want to end up with [0,1,2,3,2,4,5].
> 
> Here is the way I'm doing this now:
> 
> def straightforward_collapse(myList):
>     collapsed = [myList[0]]
>     for n in myList[1:]:
>         if n != collapsed[-1]:
>             collapsed.append(n)
> 
>     return collapsed
> 
> Is there an elegant way to do this, or should I just stick with the code 
> above?
>>> p=[1,1,1,1,1,4,4,4,8,8,9]
>>> filter(lambda y: y>0, map(lambda x,y: x==y and -1 or x,[0]+p,p+[0]))
[1, 4, 8, 9]
>>>
Z powazaniem
								Adam Przybyla


From MrJean1 at gmail.com  Sat Feb 12 21:54:38 2005
From: MrJean1 at gmail.com (python)
Date: 12 Feb 2005 18:54:38 -0800
Subject: For American numbers
In-Reply-To: <420e7376$1@nntp0.pdx.net>
References: <420e7376$1@nntp0.pdx.net>
Message-ID: <1108263278.052165.64170@g14g2000cwa.googlegroups.com>


Scott David Daniels wrote:
> Kind of fun exercise (no good for British English).
>
>      def units(value, units='bytes'):
>          magnitude = abs(value)
>          if magnitude >= 1000:
>              for prefix in ['kilo mega giga tera peta '
>                             'exa zetta yotta').split():
>                  magnitude /= 1000.
>                  if magnitude < 1000.:
>                      break
>          elif magnitude < 1:
>              for prefix in ('milli micro nano pico femto '
>                             'atto zepto yocto'.split():
>                  magnitude *= 1000.
>                  if magnitude >= 1.0:
>                      break
>              if magnitude < .001:
>                  return 'zero %s' % units
>          else:
>              prefix = ''
>          if value < 0:
>              return '-%.3f %s%s' % (magnitude, prefix, units)
>          return '%.3f %s%s' % (magnitude, prefix, units)
> 
> --Scott David Daniels
> Scott.Daniels at Acm.Org



From ville at spammers.com  Wed Feb 16 05:31:04 2005
From: ville at spammers.com (Ville Vainio)
Date: 16 Feb 2005 12:31:04 +0200
Subject: [ANN] IPython 0.6.11 is out.
References: <mailman.2609.1108458171.22381.python-list@python.org>
Message-ID: <du7650spziv.fsf@mozart.cc.tut.fi>

Warning - if you are upgrading and have an old pysh.py dangling around
in $HOME/.ipython, be sure to delete it. The old version is
incompatible with the new ipython.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From spam at nospam.org  Fri Feb 11 21:17:43 2005
From: spam at nospam.org (Erik Johnson)
Date: Fri, 11 Feb 2005 19:17:43 -0700
Subject: exception handling for a function returning several values
References: <3064b51d.0502111701.1731fef3@posting.google.com>
Message-ID: <420d6512$1@nntp.zianet.com>


<beliavsky at aol.com> wrote in message
news:3064b51d.0502111701.1731fef3 at posting.google.com...
> If I try to use y or z inappropriately when they are None, the program
> will stop. An alternative is to return an error flag in addition to y
> and z from function foo and check the value of the error flag in the
> calling program. This seems a bit awkward.

It seems to me you would be undermining the intent of exceptions here.

    If there is some reason foo() can't proceed with x, then either some
sort of a "standard exception" gets thrown as a result of trying to, or you
can detect the condition within foo() and raise a custom exception which
adequately decribes the problem. Smart callers of foo() are then coded with
the knowledge that not all values of 'x' are guaranteed to produce the
"normal" results, and have one or more 'except' clauses for them to do
whatever it is they think is most appropriate with that exception.

HTH! :)
-ej




From danperl at rogers.com  Sun Feb  6 12:31:05 2005
From: danperl at rogers.com (Dan Perl)
Date: Sun, 6 Feb 2005 12:31:05 -0500
Subject: How to read POSTed data
References: <mailman.1980.1107622913.22381.python-list@python.org>
	<4205d419$0$6610$8fcfb975@news.wanadoo.fr>
Message-ID: <lo2dnRzTVIzByZvfRVn-2Q@rogers.com>


"Pierre Quentel" <quentel.pierre at wanadoo.fr> wrote in message 
news:4205d419$0$6610$8fcfb975 at news.wanadoo.fr...
> Here is an example of how to get the POST data :
>
> #    def do_POST(self):
> #        ctype, pdict = 
> cgi.parse_header(self.headers.getheader('content-type'))
> #        length = int(self.headers.getheader('content-length'))
> #        if ctype == 'multipart/form-data':
> #            self.body = cgi.parse_multipart(self.rfile, pdict)
> #        elif ctype == 'application/x-www-form-urlencoded':
> #            qs = self.rfile.read(length)
> #            self.body = cgi.parse_qs(qs, keep_blank_values=1)
> #        else:
> #            self.body = {}                   # Unknown content-type
> #        # throw away additional data [see bug #427345]
> #        while select.select([self.rfile._sock], [], [], 0)[0]:
> #            if not self.rfile._sock.recv(1):
> #                break
> #        self.handle_data()
>
> where handle_data() is the method where you will process the data received
>
> The part related to bug #427345 is copied from CGIHTTPServer
>
> For an example of use you can take a look at the CustomHTTPServer in 
> Karrigell (http://karrigell.sourceforge.net)

Pierre, I am repeating some questions I already stated in another thread, 
'CGI POST problem', but do you have any opinions on how CGIHTTPServer's 
do_POST handles requests?  It looks to me like it always expects form data 
to be part of the POST command header, in the path of the URL, just like a 
GET request.  Am I understanding the code incorrectly?  It would also make 
sense to me that CGIHTTPServer should use the cgi module like you do in your 
example, but it doesn't use cgi.  Any opinions on that?  Is there a history 
there?  I don't know enough about HTTP, especially about its history, but 
was this a change in the HTTP specification at some point?

Thanks,

Dan 




From bh at intevation.de  Wed Feb  9 05:30:38 2005
From: bh at intevation.de (Bernhard Herzog)
Date: Wed, 09 Feb 2005 11:30:38 +0100
Subject: A ListComp that maintains its own state
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
	<87mzuf9gu8.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<s9zvf93ovp8.fsf@salmakis.intevation.de>
	<pan.2005.02.08.12.47.00.135408@jerf.org>
	<s9z8y5yq1fp.fsf@salmakis.intevation.de>
	<mailman.2215.1107900386.22381.python-list@python.org>
Message-ID: <s9zr7jqauup.fsf@salmakis.intevation.de>

Michael Spencer <mahs at telcopartners.com> writes:

> So, here's factorial in one line:
> # state refers to list of state history - it is initialized to [1]
> # on any iteration, the previous state is in state[-1]
> # the expression also uses the trick of list.append() => None
> # to both update the state, and return the last state
>
>  >>> [state.append(state[-1] * symbol) or state[-1]
> ...         for symbol, state in it.izip(range(1,10),it.repeat([1]))
> ...             ]
> [1, 2, 6, 24, 120, 720, 5040, 40320, 362880]
>  >>>

There's no need for repeat:

>>> [state.append(state[-1] * symbol) or state[-1] 
        for state in [[1]]
        for symbol in range(1, 10)]
[1, 2, 6, 24, 120, 720, 5040, 40320, 362880]


While we're at it, a while back I posted a list comprehension that
implements a 'recursive' flatten:

http://groups.google.de/groups?selm=s9zy8eyzcnl.fsf%40salmakis.intevation.de


   Bernhard

-- 
Intevation GmbH                                 http://intevation.de/
Skencil                                           http://skencil.org/
Thuban                                  http://thuban.intevation.org/


From removethis.kartic.krishnamurthy at gmail.com  Thu Feb  3 07:44:11 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Thu, 03 Feb 2005 12:44:11 GMT
Subject: IDLE history, Python IDE, and Interactive Python with Vim
In-Reply-To: <opsllommgvb1cml1@ashot>
References: <opsllommgvb1cml1@ashot>
Message-ID: <v0pMd.23222$MX2.18241@twister.nyroc.rr.com>

Ashot said the following on 2/2/2005 9:45 PM:


> Vim related:
> ----------------------
> Ideally, it would be nice to have a command mapped to a keystroke that 
> can  append the last executed command to a file.  Even better would be a 
> system  that would integrate the file editing and interactive command 
> line tool  more seamlessly.  Something along the lines of a debugger + 
> file editor  + command line utility, where file editor = vim.  I know 
> that vim has a  utility for running python commands from its command 
> prompt, but I have  had a hard time getting this to work in windows and 
> haven't explored it.   Has anyone seen/tried a system along these lines, 
> perhaps incorporating  the python debugger (pdb)?  I can see something 
> that will run the file you  are editing in vim up to the cursor or a 
> mark with a set_trace at the line  you are editing.


I am VIM guy too but I have not got to the point of writing a VIM macro 
to execute a selection.

VIM on UNIXish OSes can be built with the Python interpreter (so using 
:python <expr or exec string> will execute it). AFAIK, Vim on Windows is 
  able to execute Python using the :python notation; I guess it uses the 
Python installation. I actually did not have to do anything other than 
install GVim; it just works on windows with :python.

Try :help python in Vim to read the relevant help entries.

I was considering writing a macro, map it to a keystroke for one to 
execute a selected code block in VIM but have not yet got around to 
doing it. May be one of these days..sigh...

This probably does not help you very much but there is hope :-)

Like Fuzzyman said you can set the EDITOR environment variable and use 
IPython. The magic %edit <slice notation from history or no arguments> 
will fire up your editor and the script will be saved to a temp file. 
Though I am not entirely happy with that feature (may be something that 
I am missing) but I live it. So if you set EDITOR as gvim.exe in 
Windows, IPython fires up Gvim instead of the default notepad (yuck!).

In IPython, you can type pdb at the prompt and it toggles the debugger 
state. So if your program raises an error, IPython starts pdb if debug 
is on. IPython is nifty but I am just getting a feel for it.

Thanks,
-Kartic


From Felix.Wiemann at gmx.net  Tue Feb 15 17:57:12 2005
From: Felix.Wiemann at gmx.net (Felix Wiemann)
Date: Tue, 15 Feb 2005 23:57:12 +0100
Subject: Can __new__ prevent __init__ from being called?
References: <87is4tldea.fsf@news2.ososo.de>
	<3LOdncHRa6C77I_fRVn-rA@comcast.com>
Message-ID: <87acq5tos7.fsf@news2.ososo.de>

Steven Bethard wrote:

> Felix Wiemann wrote:
>
>> How can I prevent __init__ from being called on the
>> already-initialized object?
>
> The short answer: you can't:
>      http://www.python.org/2.2.3/descrintro.html#__new__

What a pity.  By the way, I'm just seeing that the web page says:

| If you return an existing object, the constructor call will still call
| its __init__ method. If you return an object of a different class, its
| __init__ method will be called.

However, the latter doesn't seem to be true, or am I missing something?

>>> class A(object):
...   def __init__(self):
...     print 'Init of A.'
... 
>>> instance = A()
Init of A.
>>> class B(object):
...   def __new__(self):
...     return instance
...   def __init__(self):
...     print 'Init of B.'
... 
>>> B()  # <--------- A's __init__ is *not* called.
<__main__.A object at 0x4062424c>
>>> instance = object.__new__(B)
>>> B()  # <--------- B's __init__ is called
Init of B.
<__main__.B object at 0x406243ec>

So there seems to be some type-checking in type.__call__.

> Note that in the Singleton example there, subclasses are told to
> override init, not __init__ for exactly this reason.

I see.

> py> class C(object):
> ...     class __metaclass__(type):
> ...         def __call__(cls, *args, **kwargs):
> ...             if cls.instance is None:
> ...                 print 'Creating instance'
> ...                 cls.instance = cls.__new__(cls, *args, **kwargs)
> ...                 print 'Created'
> ...                 cls.instance.__init__(*args, **kwargs)
> ...             return cls.instance

I didn't think of inlining the metaclass; that's really nice.

> [...] where all the work is done in the metaclass and you don't even
> define __new__.

Yeah, that's good.  I think I'll go that way.

Thanks a lot!

-- 
Felix Wiemann -- http://www.ososo.de/


From invalidemail at aerojockey.com  Sun Feb 20 08:06:38 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 20 Feb 2005 05:06:38 -0800
Subject: lambda closure question
In-Reply-To: <1108903184.145726.223480@l41g2000cwc.googlegroups.com>
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
	<1108808502.699333.66520@g14g2000cwa.googlegroups.com>
	<mailman.2831.1108814832.22381.python-list@python.org>
	<1108903184.145726.223480@l41g2000cwc.googlegroups.com>
Message-ID: <1108904798.377200.313970@g14g2000cwa.googlegroups.com>


Carl Banks wrote:
> Say you have a suite of functions, all of which are called by some
main
> function and each other, and all of which need to access a lot of the
> same data.  The best, most straightforward way to do it is to have
the
> common data be a local variable of the main function, and nest the
> suite inside it.  The other way to do it, passing around a common
data
> structure, add complexity and hurts performance.


This could use an example.  It'll be a little mathematical; bear with
me.

Say you want to calculate a list of points of an iterated fractal.
Here's the idea: you have a set of linear transformations.  You take
the origin (0,0) as the first point, and then apply each transformation
in turn to get a new point.  You recursively apply each transformation
at each additional point, up to a certain depth.

What's the best way to write such a function?  Using a nested function,
it's easy as pie.  (Details may be a little wrong....)

. def ifs(transformations, maxdepth):
.     def add_point(x,y,angle,depth):
.         ifspoints.append((x,y,angle))
.         if depth < maxdepth:
.             for t in transformations:
.                 nx = x + t.x*cos(angle) - t.y*sin(angle)
.                 ny = y + t.x*sin(angle) * t.y*cos(angle)
.                 nangle = angle + t.angle
.                 add_point(nx,ny,nangle,depth+1)
.     ifspoints = []
.     add_point(0.0, 0.0, 0.0, 0)
.     return ifspoints

If you didn't have the nested function, you'd have to pass not only
depth, but also maxdepth, transformations, and ifspoints around.

If you had something a little more complex than this, with more than
one nested function and more complex pieces of data you'd need to pass
around, the savings you get from not having to pass a data structure
around and referncing all that data though the structure can be quite a
lot.


-- 
CARL BANKS



From exogen at gmail.com  Sun Feb 20 17:12:52 2005
From: exogen at gmail.com (Brian Beck)
Date: Sun, 20 Feb 2005 17:12:52 -0500
Subject: Moving to Python from PHP - 3 questions
In-Reply-To: <mailman.2875.1108933444.22381.python-list@python.org>
References: <mailman.2873.1108931203.22381.python-list@python.org>	<cvat62$9h0$05$1@news.t-online.com>
	<mailman.2875.1108933444.22381.python-list@python.org>
Message-ID: <cvb26i$bph$1@eeyore.INS.cwru.edu>

Michal Migurski wrote:
> Thank you. My impression of Zope in the past has been that it does what 
> I need, along with 10,000 other things I don't (built in WebDAV 
> server?!), but clearly I owe it another chance. I've been initially 
> attracted to mod_python because of its raw simplicity and its apparent 
> similarity to mod_php and mod_perl, which I am familiar with. I'll give 
> Zope a try.

Personally, I'd have to say that your impression was right. Once you 
start using Zope, you'll start to feel locked in. Sure, it does a lot 
for you, but it's also a big investment.

I can't really help you to get mod_python working on OS X, but 
concerning your other two points, did you notice these two sections in 
the documentation?

http://modpython.org/live/current/doc-html/pyapi-sess.html

http://modpython.org/live/current/doc-html/pyapi-mprequest.html

mod_python and Zope are not your only options by far. In fact, they're 
at completely opposite ends of the spectrum; mod_python being low-level 
in that you are in control of everything and have the necessary tools to 
build a framework, and Zope being the highest-level in that it does tons 
of stuff for you. There are dozens of frameworks in between.

If you do manage to get mod_python working, I suggest taking a look at 
Vampire as well: http://www.dscpl.com.au/projects/vampire/
I have had good experience with it. Once you start using mod_python 
you'll realize you can really go anywhere you want; and that's not 
necessarily a good thing. Vampire points you in a nice direction (I 
don't want to say 'the right' direction).

--
Brian Beck
Adventurer of the First Order


From ggg at zzz.it  Wed Feb 23 04:45:46 2005
From: ggg at zzz.it (deelan)
Date: Wed, 23 Feb 2005 10:45:46 +0100
Subject: display VARCHAR(mysql) and special chars in html
In-Reply-To: <mailman.2940.1109092969.22381.python-list@python.org>
References: <mailman.2900.1109014601.22381.python-list@python.org>
	<3807siF5g9t1cU1@individual.net>
	<mailman.2940.1109092969.22381.python-list@python.org>
Message-ID: <uhnhvc.e0g.ln@news1.interplanet.it>

Jonas Meurer wrote:
(...)
> i've changed my plans, and now will transform the comments to html
> before saving them in mysql. this way, the comment never contains
> special chars except they weren't filtered out when safed in mysql.
> 
> do any filters exist, to transform plain text to html? otherwise i might
> use third-party products, as text2html.
> 
> what do you think?

as you may known mysql 4.1 offers utf-8 support. il would be
wise to keep everything as utf-8: db, html generation and finally
serve, with correct HTTP headers, pages encoded as utf-8.

to do this you might have to fiddle with mysql settings and make
sure that issuing a:

show varibles;

almost all of these settings:

character_set_client            latin1 
               character_set_connection        latin1 

character_set_database          latin1 

character_set_results           latin1 
               character_set_server            latin1 
                              character_set_system            utf8 


use utf-8 (as you can see my copy of mysql does not), otherwise i
think bad things  will occur.

if you prefer to filter out weird characters and
encode as html &#xxxx entities textile[1] does the job
just fine, you can specify input and output encoding.

cheers,
deelan.

[1] http://dealmeida.net/en/Projects/PyTextile/

-- 
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
<#me> a foaf:Person ; foaf:nick "deelan" ;
foaf:weblog <http://blog.deelan.com/> .


From domma at procoders.net  Fri Feb 11 08:50:40 2005
From: domma at procoders.net (Achim Domma (Procoders))
Date: Fri, 11 Feb 2005 14:50:40 +0100
Subject: Testing web applications
In-Reply-To: <420CB538.1060108@swiftdsl.com.au>
References: <cui0pe$r0c$04$1@news.t-online.com>
	<420CB538.1060108@swiftdsl.com.au>
Message-ID: <cuid76$j5s$00$1@news.t-online.com>

news.sydney.pipenetworks.com wrote:

> I've used Jython and a java package called httpunit to great effect. It 
> even supports javascript on your pages.

Thanks, that is the option I'm currentyl testing. Works great so far!

regards,
Achim


From danperl at rogers.com  Sat Feb  5 17:22:13 2005
From: danperl at rogers.com (Dan Perl)
Date: Sat, 5 Feb 2005 17:22:13 -0500
Subject: sos!
References: <6d2e4eef.0502050342.d8744cb@posting.google.com>
Message-ID: <StKdnVdY3-KK2pjfRVn-uw@rogers.com>


"jordan2856977" <jordan2856977 at 163.com> wrote in message 
news:6d2e4eef.0502050342.d8744cb at posting.google.com...
> hellow everybody! I'm from china. I'm a beginner of python. in china,
> python is not a fashionable language, so it's difficult to find some
> books about python. finally,I find a book named "python how to
> program" wrote by H.M.Deitel . who can tell me where can I find some
> interesting source code about python. otherwise, I will fell boring
> about study!

The Python Cookbook is a good source of examples that other posters haven't 
mentioned yet: http://aspn.activestate.com/ASPN/Cookbook/Python/

It is especially good because it contains simple, short recipes that 
illustrate a specific use of python and these recipes are organized in 
categories.

Dan 




From jepler at unpythonic.net  Mon Feb 14 19:31:18 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 14 Feb 2005 18:31:18 -0600
Subject: [Errno 18] Invalid cross-device link using os.rename
In-Reply-To: <1108414124.890402.109480@z14g2000cwz.googlegroups.com>
References: <1108414124.890402.109480@z14g2000cwz.googlegroups.com>
Message-ID: <20050215003118.GC6339@unpythonic.net>

mv is a surprisingly complex program, while os.rename is a wrapper
around rename(2) which is probably documented on your system to return
EXDEV under these circumstanes.

os.xxx is generally a fairly thin wrapper around what your OS provides,
and inherits all the "gotchas".  For some activities, os.shutil provides
something that is between os.xxx and os.system("xxx") in complexity and
capability.

Jeff
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From nav+posts at bandersnatch.org  Wed Feb 16 16:52:22 2005
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: Wed, 16 Feb 2005 16:52:22 -0500
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<37hqlrF59l2b2U1@individual.net>
Message-ID: <873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>

Leo Breebaart <leo at lspace.org> writes:

> That suggests
> to me an "obvious default" of the kind that exists elsewhere in
> Python as well.

I feel pretty much the opposite... If a non-string-type has managed to
get into my list-of-strings, then something has gone wrong and I would
like to know about this potential problem.

If you want to do force a conversion before the join, you can use a 
list comp:

', '.join([str(x) for x in l])


Nick "Explicit is better than Implicit"

-- 
#  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this to a python
print reduce(lambda x,y:x+chr(ord(y)-1),' Ojdl!Wbshjti!=obwAcboefstobudi/psh?')


From ncoghlan at iinet.net.au  Fri Feb 11 08:07:25 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 11 Feb 2005 23:07:25 +1000
Subject: a sequence question
In-Reply-To: <WYXOd.16353$uc.1671@trnddc02>
References: <lzrKd.138680$K7.56500@news-server.bigpond.net.au><Xns95EC9DCBC6294duncanrcpcouk@127.0.0.1>	<mailman.1553.1106960946.22381.python-list@python.org>
	<WYXOd.16353$uc.1671@trnddc02>
Message-ID: <420CAE0D.509@iinet.net.au>

David Isaac wrote:
> "Nick Coghlan" <ncoghlan at iinet.net.au> wrote in message
> news:mailman.1553.1106960946.22381.python-list at python.org...
> 
>>Using zip(*[iter(l)]*N) or zip(*(iter(l),)*N) simply extends the above to
> 
> the
> 
>>general case.
> 
> 
> Clearly true.
> But can you please go into much more detail for a newbie?
> I see that [iter(l)]*N produces an N element list with each element being
> the same iterator object, but after that
> http://www.python.org/doc/2.3.5/lib/built-in-funcs.html
> just didn't get me there.

See if the following interactive examples clear things up at all:

# The unclear version
Py> itr = iter(range(10))
Py> zipped = zip(*(itr,)*3) # How does this bit work?
Py> print "\n".join(map(str, zipped))
(0, 1, 2)
(3, 4, 5)
(6, 7, 8)

# Manual zip, printing as we go
Py> itr = iter(range(10))
Py> try:
...   while 1: print (itr.next(), itr.next(), itr.next())
... except StopIteration:
...   pass
...
(0, 1, 2)
(3, 4, 5)
(6, 7, 8)

# Manual zip, actually behaving somewhat like the real thing
Py> itr = iter(range(10))
Py> zipped = []
Py> try:
...   while 1: zipped.append((itr.next(), itr.next(), itr.next()))
... except StopIteration:
...   pass
...
Py> print "\n".join(map(str, zipped))
(0, 1, 2)
(3, 4, 5)
(6, 7, 8)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From erikbethke at gmail.com  Tue Feb  8 10:25:09 2005
From: erikbethke at gmail.com (Erik  Bethke)
Date: 8 Feb 2005 07:25:09 -0800
Subject: in wxPython,
	how to minimize the window in absence of minimize button?
Message-ID: <1107876309.633248.318460@o13g2000cwo.googlegroups.com>

Hello All,

I now have a wx.NO_BORDER frame that I have written dragging code
for... I like my window this way as it looks sleeker and I am now
installing some image buttons.

Now I would like to create a new minimize button from an image, and
then capture that mouse down and cause it to minimize the window...

I can make buttons all day long, despite all of my googling I still
cannot figure out what method I should call with my minimize button...

Please help thank you,
-Erik



From danperl at rogers.com  Sat Feb  5 16:38:23 2005
From: danperl at rogers.com (Dan Perl)
Date: Sat, 5 Feb 2005 16:38:23 -0500
Subject: How to read POSTed data
References: <mailman.1980.1107622913.22381.python-list@python.org>
Message-ID: <4O2dnYcOCuxNoZjfRVn-pg@rogers.com>


"H?kan Persson" <hakan at zyberit.com> wrote in message 
news:mailman.1980.1107622913.22381.python-list at python.org...
> Hi.
>
> I am trying to set up a simple HTTP-server but I have problems reading 
> data that is beeing POSTed.
>
> class httpServer(BaseHTTPServer.BaseHTTPRequestHandler):
>    def do_POST(self):
>        input = self.rfile.read()
>
> The self.rfile.read() will hang on the
> data = self._sock.recv(recv_size)
> line in the read() function in socket.py.
>
> Is there another way to read the data?

I'm not an expert on this subject, but I am in the process of looking at the 
code in BaseHTTPServer and other related modules.  What I see used is 
normally self.rfile.readline() and that makes more sense to me (intuitively) 
than read().  Have you tried that? 




From mcfletch at rogers.com  Fri Feb  4 13:59:12 2005
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Fri, 04 Feb 2005 13:59:12 -0500
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <dvOMd.33656$EG1.19314@lakeread04>
References: <dvOMd.33656$EG1.19314@lakeread04>
Message-ID: <4203C600.60406@rogers.com>

Alan McIntyre wrote:
...

> I have a list of items that has contiguous repetitions of values, but 
> the number and location of the repetitions is not important, so I just 
> need to strip them out.  For example, if my original list is 
> [0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5], I want to end up with 
> [0,1,2,3,2,4,5].

...

> Is there an elegant way to do this, or should I just stick with the 
> code above?

 >>> def changes( dataset ):
...     last = None
...     for value in dataset:
...         if value != last:
...             yield value
...         last = value
...        
 >>> print list(changes(data ))

which is quite readable/elegant IMO.

Have fun,
Mike

________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com
                              PyCon is coming...



From mikej at well.com  Sat Feb 19 05:36:51 2005
From: mikej at well.com (Michael Josephson)
Date: Sat, 19 Feb 2005 10:36:51 +0000
Subject: Can I get message filename from a Maildir mailbox stream?
References: <1108778311.300124.56920@f14g2000cwb.googlegroups.com>
Message-ID: <ir4e11de0qvhtm585kt91uocd4gvf65d5r@4ax.com>

>a way to figure out what filename an email object points to in a 
>qmail style Maildir directory?

Assuming you're using the mailbox module from the standard Python
library, the Message objects you get back provide access to the file
object as an instance variable called fp. So if you have:

maildir = mailbox.Maildir("/home/mike/Maildir")
message = maildir.next()

The filename is message.fp.name

Note that the file object is open when you are in this state so you
may want to close it before you do a move/delete etc.

-Michael


From jzgoda at gazeta.usun.pl  Sat Feb 26 09:31:55 2005
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Sat, 26 Feb 2005 15:31:55 +0100
Subject: possible python/linux/gnome issue!!
In-Reply-To: <RG_Td.10664$1C.4@news02.roc.ny>
References: <mailman.3073.1109376619.22381.python-list@python.org>
	<RG_Td.10664$1C.4@news02.roc.ny>
Message-ID: <cvq1h2$pai$1@nemesis.news.tpi.pl>

Lee Harr napisa?(a):

>>[root at lserver2 bin]# redhat-config-services
>>/usr/share/redhat-config-services/serviceconf.py:331: SyntaxWarning:
>>argument named None
>>  def on_mnuRescan_activate(self,None):
> 
> I don't think this has ever been legal... so that's strange.

It was, but currently is not 
(http://www.python.org/doc/2.4/whatsnew/node12.html).

-- 
Jarek Zgoda
http://jpa.berlios.de/ | http://www.zgodowie.org/


From aleaxit at yahoo.com  Mon Feb  7 04:34:10 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 7 Feb 2005 10:34:10 +0100
Subject: remove duplicates from list *preserving order*
References: <BfmdnTjWquaJEZ_fRVn-3A@comcast.com>
Message-ID: <1grlz25.2tcd4wkxqt70N%aleaxit@yahoo.com>

Steven Bethard <steven.bethard at gmail.com> wrote:
   ...
> I have a list[1] of objects from which I need to remove duplicates.  I
> have to maintain the list order though, so solutions like set(lst), etc.
> will not work for me.  What are my options?  So far, I can see:

I think the recipe by that subject in the 1st Edition Python Cookbook is
pretty exhaustive wrt the possibilities that were available up to Python
2.2 under various hypotheses of: are the items hashable, do you want to
keep the first one of several duplicates or the last one or some one
chosen by arbitrary criteria, etc, etc.  In 2.3/2.4, the addition of
`set' simplifies many solutions, and itertools simplify others; besides,
it appears that you don't care which duplicate is kept, need use
equality only (not an equivalence-function), and do have hashable items,
so most of the ideas in that recipe aren't needed anyway.


> def filterdups(iterable):
>      seen = set()
>      for item in iterable:
>          if item not in seen:
>              seen.add(item)
>              yield item
> 
> Does anyone have a better[2] solution?
> 
> STeve
> 
> [1] Well, actually it's an iterable of objects, but I can convert it to
> a list if that's helpful.
> 
> [2] Yes I know, "better" is ambiguous.  If it helps any, for my 
> particular situation, speed is probably more important than memory, so
> I'm leaning towards the second or third implementation.

I doubt you can do _substantially_ better than filterdups, unless some
particularly special conditions apply, e.g., the items are hashable but
hashing them is very time-consuming.  In that case you might avoid
hashing items twice, as filterdups does, by some hack such as:

def filterdups_hackish(iterable):
    seen = set()
    olen = 0
    for item in iterable:
        seen.add(item)
        nlen = len(seen)
        if nlen > olen:
            yield item
            olen = nlen

Here's a toy example of how this might help, given costly hashing:

class examp(object):
    def __init__(self, i): self.i = i//2
    def __hash__(self): return self.i**7 % 999999

dups = [examp(x) for x in range(1000)]

def fd1():
    for x in filterdups(dups): pass

def fd2():
    for x in filterdups_hackish(dups): pass


kallisti:~/cb alex$ python -mtimeit -s'import fid' 'fid.fd1()'
10 loops, best of 3: 55.6 msec per loop
kallisti:~/cb alex$ python -mtimeit -s'import fid' 'fid.fd2()'
10 loops, best of 3: 33.4 msec per loop


Probably not worth the bother even for this level of hashing costs and
density of duplicates, as you see, but maybe an idea keeping in mind if
the duplicates are few and hashing is really costly: having both the
membership test AND the insertion means you hash the item twice; the
hackish alternative is to insert anyway (hashing but once) and see if
that made a difference (taking the len is always cheap).


Alex


From claudio.grondi at freenet.de  Sun Feb  6 13:11:51 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Sun, 6 Feb 2005 18:11:51 -0000
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot> <opsln54fpwej1m1c@ashot>
	<36hculF51ho2sU1@individual.net>
	<1107530489.308497.103530@g14g2000cwa.googlegroups.com>
	<36hrjpF4ui8fbU1@individual.net>
	<mailman.1911.1107546744.22381.python-list@python.org>
	<36i84qF52ce29U1@individual.net> <opslo127s7ej1m1c@ashot>
	<cu0umf$cja$1@sea.gmane.org>
	<mailman.1936.1107561113.22381.python-list@python.org>
	<opslo7jfhqej1m1c@ashot> <36l1dgF52b9d6U1@individual.net>
	<4205605f_2@news.unc.edu> <42057751_1@news.unc.edu>
Message-ID: <36n1gfF505tarU1@individual.net>

Hi,

I have done some more work on Console.py
from the readline package version 1.12, adding
support for background colors and testing of proper
function of them (run the Console.py script to
see coloured output).
Added was also the possibility to set the default
text/background colors for colored output using:
  Console.setStandardBackgroundColorTo(strColor)
  Console.setStandardForegroundColorTo(strColor)
where strColor can be one of:
[
 '(dark)black'
,'(dark)red',
,'(dark)green'
,'(dark)yellow'
,'(dark)blue'
,'(dark)purple'
,'(dark)cyan'
,'(dark)white'
,'light black'
,'light red'
,'light green'
,'light yellow'
,'light blue'
,'light purple'
,'light cyan'
,'light white'
]

There are some comments added where e.g.
the colors are named including their HTML color
notation to clarify which colors are displayed.
I work on Windows 2000 SP 4, so it will be
interesting for me to get some feedback if the
colors are the same in other Windows versions.
Which colors are displayed on Linux/Unix by
the native readline?

There are also some other changes done to
make the code better readable (from my
personal point of view ;-)

The blnIPythonFixActive flag allows to set colored
text output of IPython to (dark)white background
(instead of the standard one, which is  in my
Console the 'light white' one i.e. I work with white
background as IDLE does).

Another modification is, that when a text without
escape sequences is passed to Console.write(),
no escape sequences are sent, so, that the
colouring stays the same until it is explicitely
reset. I find this behaviour more strightforward
than the implicit writing of texts in the standard
colors if no colors are specified.

If someone is interested to check it out I have
uploaded it to:
 http://people.freenet.de/AiTI-IT/Python/Console.py

The extended Console.py module can be used
standalone for writing of any coloured texts
to the console using alternatively .
  Console.setStandardBackgroundColorTo(strColor)
  Console.setStandardForegroundColorTo(strColor)
  with resetting the colors
or the build-in ANSI escape sequences for the
text and the background.

Utilizing the code or some parts of it in
the next release of readline is welcome.

Claudio

"Gary Bishop" <gb at cs.unc.edu> schrieb im Newsbeitrag
news:42057751_1 at news.unc.edu...
> On SourceForge you will find release 1.12 of my Python readline
> module. If you don't want to hack the colors, there is no reason to
> upgrade from 1.11 to 1.12. They *should* work the same.
>
> But if you'd like to hack the iPython colors this new version makes it
> possible.  In your ipythonrc file add a line like:
>
> execfile hackcolors.py
>
> Now in hackcolors.py you can change colors and backgrounds like this:
>
> ####hackcolors.py####
> import readline
>
> # reach deep into the bowels of readline to get the color table
> escape_to_color = readline.rl.console.escape_to_color
>
> # change a color
> escape_to_color['0;32'] = 0x72
>
> del escape_to_color
> del readline
>
> #################
>
> The two hex digits are the background and foreground color
> respectively. In the example above I'm setting the color to green on a
> grey background. Here is the table that is normally used to translate
> colors.
>
>   escape_to_color = { '0;30': 0x0,             #black
>                       '0;31': 0x4,             #red
>                       '0;32': 0x2,             #green
>                       '0;33': 0x4+0x2,         #brown?
>                       '0;34': 0x1,             #blue
>                       '0;35': 0x1+0x4,         #purple
>                       '0;36': 0x2+0x4,         #cyan
>                       '0;37': 0x1+0x2+0x4,     #grey
>                       '1;30': 0x1+0x2+0x4,     #dark gray
>                       '1;31': 0x4+0x8,         #red
>                       '1;32': 0x2+0x8,         #light green
>                       '1;33': 0x4+0x2+0x8,     #yellow
>                       '1;34': 0x1+0x8,         #light blue
>                       '1;35': 0x1+0x4+0x8,     #light purple
>                       '1;36': 0x1+0x2+0x8,     #light cyan
>                       '1;37': 0x1+0x2+0x4+0x8, #white
>                       '0': None,
>                       }
>
> An interested party should be able to arbitrarily map colors and their
> backgrounds.
>
> Enjoy,
> gb
>




From http  Fri Feb  4 21:30:31 2005
From: http (Paul Rubin)
Date: 04 Feb 2005 18:30:31 -0800
Subject: how to send an int over a socket
References: <mailman.1942.1107570470.22381.python-list@python.org>
Message-ID: <7xfz0b7n7c.fsf@ruckus.brouhaha.com>

Tom Brown <brown at esteem.com> writes:
> However, in my actual program I will not know the length of testmessage in 
> advance. So how do I convert msglen into a suitable format for the send 
> method?

    >>> str(123)
    '123'

You might also look at 

   http://cr.yp.to/proto/netstrings.txt

which describes some issues you should pay attention to, and suggests
a standardized format.


From artixan at gmail.com  Tue Feb 22 19:02:28 2005
From: artixan at gmail.com (artixan at gmail.com)
Date: 22 Feb 2005 16:02:28 -0800
Subject: Writting to specific location in a file
Message-ID: <1109116948.068647.147540@f14g2000cwb.googlegroups.com>

I have a database result set in a Python list. Each row is a tuple.
data = [(a_field,b_field,c_field,d_field,x_field,y_field,z_field)]

I need to loop thru this data and write each row to a text file.

f = open('out.txt','w')
for row in data:
    f.writelines(row)


My chanllenge  is that each field needs to have a exact specific
position in the output file.
For instance a_field needs to start at position 2 in the line, b_fields
at position 18 and so on, for all the fields on each line.


What is a way of approaching this problem. I was think of maybe
creating a Cheetah template file. Is there a simple way to go?

Can anyone point me to a possible way of doing this?


Thanks a lot,

Arnaldo



From rt-announce-bounces at lists.bestpractical.com  Fri Feb 11 21:22:03 2005
From: rt-announce-bounces at lists.bestpractical.com (rt-announce-bounces at lists.bestpractical.com)
Date: Fri, 11 Feb 2005 21:22:03 -0500
Subject: Your message to RT-Announce awaits moderator approval
Message-ID: <mailman.822.1108174923.22590.rt-announce@lists.bestpractical.com>

Your mail to 'RT-Announce' with the subject

    Delivery by mail

Is being held until the list moderator can review it for approval.

The reason it is being held:

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From sw at wordtech-software.com  Thu Feb 24 23:45:01 2005
From: sw at wordtech-software.com (Kevin Walzer)
Date: Thu, 24 Feb 2005 23:45:01 -0500
Subject: More newbie macosx user questions
In-Reply-To: <mailman.3018.1109279499.22381.python-list@python.org>
References: <mailman.3018.1109279499.22381.python-list@python.org>
Message-ID: <l3yTd.3896$Eq2.524@fe37.usenetserver.com>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

This link might help:

http://www.astro.washington.edu/owen/AquaEnvVar.html



Timothy Grant wrote:
| I think I'm mis-understanding something about how PYTHONPATH works (at
| least on OSX I didn't have this trouble on Linux).
|
| I have a directory where I store libraries that I'm playing around
| with. However, for some reason python can't find the library. Since
| I'm using PyQt, I use pythonw, but the results are identical with
| python. It doesn't look like my PYTHONPATH is getting prepended to the
| library path.
|
| Can anyone tell me what I'm doing wrong?
|
| (timothygrant at bastard%) echo $PYTHONPATH
| /Users/timothygrant/code/lib
| (timothygrant at bastard%) ls $PYTHONPATH
| NJB.py    NJB.pyc   _njb_c.so njb_c.py  njb_c.pyc
| (timothygrant at bastard%) pythonw
| Python 2.3 (#1, Sep 13 2003, 00:49:11)
| [GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin
| Type "help", "copyright", "credits" or "license" for more information.
|
|>>>import NJB
|
| Traceback (most recent call last):
|   File "<stdin>", line 1, in ?
| ImportError: No module named NJB
|
|>>>import sys
|>>>for p in sys.path:
|
| ...     print p
| ...
|
| /System/Library/Frameworks/Python.framework/Versions/2.3/lib/python23.zip
| /System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3
|
/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/plat-darwin
|
/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/plat-mac
|
/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/plat-mac/lib-scriptpackages
|
/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/lib-tk
|
/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/lib-dynload
|
/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages


- --
Cheers,

Kevin Walzer, PhD
WordTech Software--Open Source Applications and Packages for OS X
http://www.wordtech-software.com
http://www.smallbizmac.com
http://www.kevin-walzer.com
mailto:sw at wordtech-software.com
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (Darwin)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org

iD8DBQFCHq1MJmdQs+6YVcoRAmVnAKCIL/ceAZVQXrvjIw/YE5OpeQTdcgCfc5FN
hJtbmQBCTnI/2wv4/CEuMcA=
=QxVP
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From johnpote at blueyonder.co.uk  Wed Feb  9 06:35:40 2005
From: johnpote at blueyonder.co.uk (John Pote)
Date: Wed, 09 Feb 2005 11:35:40 GMT
Subject: tkinter menu bar problem
Message-ID: <gAmOd.31235$68.23603@fe1.news.blueyonder.co.uk>

I have a menu bar in a top level window as follows

 menuBar = Menu(rootWin)
 menuBar.add_command( label='Quit', command=rootWin.quit)

 configMenu = Menu(menuBar, tearoff=0)
 configMenu.add_command(label='Left Device Raw', command=setLeftRaw)
 configMenu.add_command(label='Right Device Raw', command=setRightRaw)
 etc

menuBar.add_cascade(label='Config', menu=configMenu)

 rootWin.config(menu=menuBar)

Q1 Cannot find a way of changing the menu bars background colour. When 
colour options are accepted they seem to be ignored. Is this a native look 
and feel characteristic of write once run anywhere, not yet implemented or 
possibly a bug.

Q2 Some of the menu options in the config menu will not always be available 
depending on program state. How can individual items in such a menu be 
turned to faint gey to indicate their unavailability. Also a tick mark 
against an item would be useful to show the currently selected option. Is 
this possible?

Regards,
John Pote

System: Win XP, Python 2.3.4





From bruno at modulix.org  Mon Feb 14 20:28:28 2005
From: bruno at modulix.org (bruno modulix)
Date: Tue, 15 Feb 2005 02:28:28 +0100
Subject: [long] nested lists as arrays
In-Reply-To: <1108402043.941832.34110@f14g2000cwb.googlegroups.com>
References: <1108384089.804375.179130@f14g2000cwb.googlegroups.com>
	<42109efc$0$23451$626a14ce@news.free.fr>
	<1108402043.941832.34110@f14g2000cwb.googlegroups.com>
Message-ID: <42114db9$0$6837$626a14ce@news.free.fr>

benjamin.cordes at blawrc.de a ?crit :
> Thanks for the code.
> What I want to do is this:
> I want to solve the block puzzle problem.  The problem is as follows:
> You have a nxn Array of Numbers and one empty space. Now you there are
> up to four possible moves: up, right, down and left, so that each
> neighbour of the empty slot can be moved there.
> 
> The method getEmptySlot is for getting the empty slot. The method
> getPossibleMoves returns the possible moves. Perfoming a move is
> swaping one element with the empty slot marked as -1.
> 
> The full executable code is appended.
s/executable/source/ !-)

> The expected behaviour is that when the move is performed the
> appropiate elements should be swaped. But for some reason every now and
> then it swaps the wrong elements.

So the problem is not that you "can't" swap 2 elements, but that there 
seems to be some logical bug(s) in your code.

> # Puzzle.py
> # class for a sliding block puzzle
> 
(snip)

> import random
> import copy
> 
> class Puzzle:
> 
>     def __init__(self, dim):
>        self.dim = dim
>        self.elements = [[0 for column in range(dim)] for row in
> range(dim) ]

So at this stage you've got 3 rows of 3 colums:
[
   ['row 0 - col 0', 'row 0 - col 1', 'row 0 - col 2'],
   ['row 1 - col 0', 'row 1 - col 1', 'row 1 - col 2'],
   ['row 2 - col 0', 'row 2 - col 1', 'row 2 - col 2']
]

Is that right ?

>     def __str__(self):
>         s = ""
>         i = 0
>         j = 0
>         while i  <= self.dim-1:
ok, looping on rows

>             while j  <= self.dim-1:
and now looping on columns in current row...

>                 s = s + str(self.elements[j][i])

oops ! Looks like you're addressing row[j] column[i] instead of row[i] 
column[j] !-)

>                 j=j+1
>                 s = s + "\t"
>             i=i+1
>             j = 0
>             s = s + "\n"
>         return s

(snip the rest of the code)

Ok, let's try with a slightly more pythonic (and thus more readable) 
version of this code (I used another method name so we can compare both 
versions):

def to_string(self):
   s = []
   for row in self.elements:
     for col in row:
        s.append('%d\t' % col)
     s.append('\n')
   return ''.join(s)

For testing purpose, let's modify the __init__ a bit (this will break 
the code but what, it's just to check something, we can get back to 
original code later):

def __init__(self, dim):
   self.dim = dim
   self.range = range(self.dim)
   #self.elements = [[0 for column in self.range] for row in self.range]
   self.elements = [[int('%d%d' % (row, column)) for column in 
self.range] for row in self.range]
   # check we have a correct layout, remove me when fixed:
   print "%s" % self.elements

and now let's try:
 >>> p = Puzzle(3)
[[0, 1, 2], [10, 11, 12], [20, 21, 22]]

so far, so good, we have 3 rows of 3 columns each.
let's continue:
 >>> print p.to_string()
0	1	2	
10	11	12	
20	21	22	

Ok, so our new to_string() method is ok. Now the real test:
 >>> print p
0	10	20	
1	11	21	
2	12	22	

Remember ?
"""
oops ! Looks like you're addressing row[j] column[i] instead of row[i] 
column[j]
"""

Looks like we found one bug...

Let's continue and rewrite some more code:

def compare(self, other):
   if (self.dim != other.dim):
     return False

   for self_row, other_row in zip(self.elements, other.elements):
     for self_col, other_col in zip(self_row, other_row):
       if self_col != other_col:
         return False

   return True

Ok, that one was easy. Let's try with another one

def getEmptySlot(self):
   for row in self.elements:
     for cell in row:
       if cell == -1:
          return ???

Mmmm... won't work. Seems we need indices here, let's try again:

def getEmptySlot(self):
   for row in self.range:
     for col in self.range:
       if self.elements[row][col] == -1:
         return (row, col)

Ok, not so clean but still readable (notice how using explicit names 
like 'row' and 'col' helps understanding the code...).

Now let's do the swap:

def swapElements(self, from_cell, to_cell):
   from_row, from_col = from_cell
   to_row, to_col = to_cell
   elts = self.elements
  elts[to_row][to_col], elts[from_row][from_col] = 
elements[from_row][from_col], elts[to_row][to_col]

Mmmm... this begins to smell. I don't like having to split the coords 
like this. I'd prefer something like:

def swapElements(self, from_cell, to_cell):
   self.elements[from_cell], self.elements[to_cell] \
   = self.elements[to_cell], self.elements[from_cell]

This could be possible if we used another data structure. Something like 
  a dict of coords:value pairs. We could build it like this:

def __init__(self, dim):
   self.dim = dim
   self.range = range(self.dim)
   self.elements = {}
   for row in self.range:
     for col in self.range:
       self.elements[(row,col)] = 0

and then the search for the empty slot:

def getEmptySlot(self):
   for coords, value in self.elements.items():
     if value == -1:
       return coords
   assert(False)   # shouldn't be here anyway !

Hey, that looks nicer, isn't it ? But what with the __str__() method ?
We can't use the dict.items() method since dicts are not ordered. But we 
can recompute the keys... What about :

def __str__(self):
   s = []
   for row in self.range:
     for col in self.range:
       s.append("%d\t" % self.elements[(row, col)])
     s.append('\n')
   return ''.join(s)

Was not so difficult, finally. Now the compare() has to be rewritten too:

def compare(self, other):
   if (self.dim != other.dim):
     return 0

   for row in self.range:
     for col in self.range:
       if self.elements[(row,col)] != other.elements[(row,col)]:
         return False
   # no difference
   return True

Err... Wait a minute... What are we doing here ? Comparing 2 dicts ? 
Wait, wait, let's check something...

 >>> '__eq__' in dir(dict)
True

Haha ! Our good'ole dict already has an 'equality' special method... Now 
is this a 'value' or 'identity' equality ?

 >>> d1 = {1:1, 2:2}
 >>> d2 = {2:2, 1:1}
 >>> d1 == d2
True

Bingo ! Play it again, sam :

def compare(self, other):
   return self.elements == other.elements

Hehehe. Less code, better code, as grand'ma used to say !-)

Now the fine part : let's make it move. What was it like ?

def performMove(self, direction):
   slot = self.getEmptySlot()
   if (direction == "up"):
     self.swapElements(slot[1], slot[0], slot[1]+1, slot[0])
   elif (direction == "down"):
     self.swapElements(slot[1], slot[0], slot[1]-1, slot[0])
   elif direction == "left":
     self.swapElements(slot[1], slot[0], slot[1], slot[0]-1)
   elif (direction == "right"):
     self.swapElements(slot[1], slot[0], slot[1], slot[0]+1)

This won't work since our swapElements() method now expects 2 tuples. 
Let's look closer. The first pair is always the same, it's the actually 
the empty slot. Quite sensible. We just have to create the second tuple 
from the first. And BTW, I don't like the if/elif neither. What about 
using a dict again ? :

def performMove(self, direction):
   slot = self.getEmptySlot()
   to_slot = {'up'   : lambda (row, col): (row-1, col),
              'down' : lambda (row, col): (row+1, col),
              'left' : lambda (row, col): (row, col-1),
              'right': lambda (row, col): (row, col+1)}
   self.swapElements(slot, to_slot[direction](slot))

Better, but not quite ok: it's silly to recreate the to_slot dict each 
time. Let's put it in the __init__ :

def __init__(self, dim):
   self.dim = dim
   self.range = range(self.dim)
   self.elements = {}

   for row in self.range:
     for col in self.range:
       self.elements[(row,col)] = 0

   self.to_slot = {'up'   : lambda (row, col): (row-1, col),
        	          'down' : lambda (row, col): (row+1, col),
                   'left' : lambda (row, col): (row, col-1),
                   'right': lambda (row, col): (row, col+1)}


and now our performMove() method become:

def performMove(self, direction):
   slot = self.getEmptySlot()
   self.swapElements(slot, self.to_slot[direction](slot))


Begins to look better, isn't it ? Ok, your turn to play !-)
Just two more things :

1/
getPossibleMoves(self):
   emptySlot = self.getEmptySlot()
   y = emptySlot[1]
   x = emptySlot[0]
   (...)

could benefit from being rewritten as:

getPossibleMoves(self):
   row, col = self.getEmptySlot()
   (...)

(Yes, Python will automagically 'unpack' the tuple !-)

2/
     def getChildren(self):
         moves = self.getPossibleMoves()
         self.children = []
         for eachMove in moves:
             newchild = copy.copy(self.performMove(eachMove))

performMove() doesn't explicitly return anything, so it implicitly 
returns None. This may not give you what you want !-)

If the idea is to 'capture' the state of the puzzle object, you may want 
to have performMove() returning self. *But* remember that the state of 
the puzzle object is affected by performMove(), so this may not behave 
as expected either, since after each move, the possible moves change.

So the solution would be to 'clone' self *before* each performMove(), 
call the performMove() on each clone and store the clone.

(BTW, the name of the method may be somewhat misleading, and I'm not 
sure this method really belongs to the Puzzle class. )

and finally (pun intend !-) :

             try:
                 self.children.append(newchild)
             except:
                 print "Exception: " + str(len(self.children))

This is the only place where you handle exceptions. But there is no 
particular reason to expect an exception here. So your try/except block 
is useless. Worse, it's badly coded, since you don't specify which 
exception you want to catch. This may put you into troubles (probably 
not here, but... I recently had hard time to debug some code that had 
many 'catch-all' except clauses.)

Well... You seem to like puzzles, so I leave it up to you to finish that 
one.

*warning* : this 100% untested code. You should write some unit tests to 
make sure every method woks as expected.

HTH
Bruno


From siona at chiark.greenend.org.uk  Thu Feb 17 08:55:10 2005
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 17 Feb 2005 13:55:10 +0000 (GMT)
Subject: Stable GUI + wxPython memory leak
References: <c0e7fd79.0502160619.565eb40e@posting.google.com>
	<1108569376.721830.67370@o13g2000cwo.googlegroups.com>
	<1108596113.424102.255340@f14g2000cwb.googlegroups.com>
	<RbCdnauwxveOaY7fRVn-qg@powergate.ca>
Message-ID: <Y7g*pIsHq@news.chiark.greenend.org.uk>

Peter Hansen  <peter at engcorp.com> wrote:
>Viktor wrote:
>> I just noticed that wxPython is leaking memory?! Playing with
>> wxPython-demo, I started with 19MB used, and ended whith almost 150MB
>> used?!
>> It's wxPython 2.5.3.1 running on Python 2.4.
>On which platform?
>
>And how are you measuring this apparent memory consumption?

And what are you doing to the demo to provoke it? (I've had a
wxPython application significantly increase its memory footprint
on Windows just from opening a file dialog.)

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From ncoghlan at iinet.net.au  Thu Feb 10 09:50:34 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 11 Feb 2005 00:50:34 +1000
Subject: lambda and for that matter goto not forgetting sugar
In-Reply-To: <tFJOd.38794$68.10179@fe1.news.blueyonder.co.uk>
References: <tFJOd.38794$68.10179@fe1.news.blueyonder.co.uk>
Message-ID: <420B74BA.8080409@iinet.net.au>

Philip Smith wrote:
> I've read with interest the continuing debate about 'lambda' and its place 
> in Python.
> 
> Just to say that personally I think its an elegant and useful construct for 
> many types of programming task (particularly number theory/artificial 
> intelligence/genetic algorithms)
> 
> I can't think why anyone would be proposing to do away with it.  Sometimes 
> an anonymous function is just what you need and surely it just reflects the 
> python philosophy of everything being an object (in this case a code 
> object).

The *concept* is fine, but the current syntax is seriously ugly, and the keyword 
used creates false expectations for those familiar with what lambda calculus 
actually *is*.

If the lambda syntax were a new proposal to be added to the language now, it 
would never be accepted.

Unfortunately, its existence tends to stymie efforts to come up with a 
*Pythonic* way of spelling the same idea. The people who want to get rid of 
lambda completely think coming up with a new spelling is a waste of time - "Just 
define the damn function already!" is their rallying cry. The people who want 
real lambda calculus complain that they still can't put statements inside 
expressions - they shout "Give me real anonymous functions, not this neutered 
junk that restricts me to a single expression!". And, of course, there's always 
someone to complain that supporting a new spelling would violate TOOWTDI - "But, 
but, we already have def and lambda, why are you trying to come up with yet 
another way to create a function?".

Anyway, check out AlternateLambdaSyntax on the python.org Wiki if you haven't 
already. For my own part, I'd like a new spelling. Something that is more 
stylistically in line with a genexp would be significantly preferable to the 
status quo (e.g "(x*x from (x))" aligns better with "(x*x for x in seq)" than 
"lambda x: x*x" does).

> Following on naturally from that last point I would also like to 'deprecate' 
> the use of the expression 'syntactic sugar' on these pages.  All high level 
> languages (Python included) are nothing but syntactic sugar designed to 
> conceal the ugliness of what actually gets sent to the CPU to make it all 
> happen.

Yup, you're right. But 'syntactic sugar' often isn't used in a negative way - 
it's more descriptive than anything. It's any language change that's designed to 
make common idioms easier to use.

Cheers,
Nick.
No comment on the goto thing ;)

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From irmen.NOSPAM at xs4all.nl  Mon Feb 14 17:51:23 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Mon, 14 Feb 2005 23:51:23 +0100
Subject: is there a safe marshaler?
In-Reply-To: <7xbramzt1c.fsf@ruckus.brouhaha.com>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<1108051828.483222.62670@z14g2000cwz.googlegroups.com>
	<7xmzu6q4cv.fsf@ruckus.brouhaha.com>
	<4211185b$0$28982$e4fe514c@news.xs4all.nl>
	<7xbramzt1c.fsf@ruckus.brouhaha.com>
Message-ID: <42112b1e$0$28978$e4fe514c@news.xs4all.nl>

Paul Rubin wrote:
> Yes, however, you can at least set the protocol level.  Marshal doesn't
> give you that option.

That's right. So good for Pyro then :)
It works most of the time, even across different Python versions,
unless using mobile code.

> What do you do about the security issue if you're using pickle?  Do
> you have to trust the other end to not send you malicious pickles?

I do nothing about it.
Yes, you have to trust the other end.
So you have to use your own -or Pyro's- authentication/authorization
logic to make sure that the other end can be trusted.
You could use SSL with certificates for instance.

In fact, this is the reason why I started this thread.
I wanted to discover some possibilities to replace pickle
by another thing, so that Pyro becomes 'safe' at the wire
protocol level.
But further discussion on the Pyro mailing list sort of
made it clear that this is not desirable.

--Irmen


From alan.mcintyre at esrgtech.com  Fri Feb  4 13:04:53 2005
From: alan.mcintyre at esrgtech.com (Alan McIntyre)
Date: Fri, 04 Feb 2005 13:04:53 -0500
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <l56dnQ3CxKitKp7fRVn-jA@comcast.com>
References: <dvOMd.33656$EG1.19314@lakeread04>
	<l56dnQ3CxKitKp7fRVn-jA@comcast.com>
Message-ID: <9POMd.33658$EG1.21697@lakeread04>

Your first example is along the lines of what I was thinking when I said 
"elegant."  :)   I was looking for something that I could drop into one 
or two lines of code; I may not do that if I'm writing code that will 
have to be maintained, but it's still nice to know how to do it.

Thanks :)
Alan

Steven Bethard wrote:
> Well, this does about the same thing, but using enumerate and a list 
> comprehension:
> 
> py> lst = [0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5]
> py> [item for i, item in enumerate(lst) if i == 0 or item != lst[i-1]]
> [0, 1, 2, 3, 2, 4, 5]
> 
> Similar code that doesn't check 'if i == 0' each time through:
> 
> py> itr = enumerate(lst)
> py> itr.next()
> (0, 0)
> py> [lst[0]] + [item for i, item in itr if item != lst[i-1]]
> [0, 1, 2, 3, 2, 4, 5]
> 
> I don't know if either of these is really more elegant though...
> 
> Steve


From richie at entrian.com  Thu Feb 10 09:26:59 2005
From: richie at entrian.com (Richie Hindle)
Date: Thu, 10 Feb 2005 14:26:59 +0000
Subject: OT: Anyone want a GMail account?
In-Reply-To: <f03f4fdf050210055935516eea@mail.gmail.com>
References: <f03f4fdf050210055935516eea@mail.gmail.com>
Message-ID: <6irm01tn8hjkou6jhh3n38l0flvnv671q4@4ax.com>


[Chris]
> I've got 50 so if you want a GMail invite reply directly to me and
> I'll send our an invite.

You can share your GMail invites here:

  http://isnoop.net/gmailomatic.php

"This page offers a place for people with Gmail invites and those who want
them to come together with minimal effort and fuss.  Currently, we have
1,500,443 invites available to share. Thanks to the generosity of folks
like you, we've distributed 248,204 invites since this page went up on Sep
13, 2004."

Hitting Reload a couple of times, they seem to be accumulating and
distributing several invites per second.  Shame it's written in PHP 8-)

-- 
Richie Hindle
richie at entrian.com



From Franck.Pommereau at noos.fr  Mon Feb 21 05:02:47 2005
From: Franck.Pommereau at noos.fr (Franck Pommereau)
Date: Mon, 21 Feb 2005 11:02:47 +0100
Subject: [PyGTK] forbid focus of TreeView columns
Message-ID: <4219b17e$0$8861$79c14f64@nan-newsreader-07.noos.net>

Hi all,

I'm building a PyGTK interface in which I would like that no widget 
would be able to get the focus (and so to be activated by pressing the 
Return key). For this purpose, for each widget, I do:

     widget.set_property("can-focus", gtk.FALSE)

My problem is a TreeView which has a clickable column, it get the 
default focus and I did not find how to forbid that.

I tried:

     def focus (widget, *args) :
         try :
             widget.set_property("can-focus", gtk.FALSE)
         except :
             pass
         try :
             widget.set_property("can-default", gtk.FALSE)
         except :
             pass
     win.forall(focus)

where win is my application window (I also tried on the TreeView) but it 
doesn't work.  :-(
I also tried with widget.unset_flags, same result.  :-((

If I choose another widget and give it the default focus 
(widget.grab_default and widget.grab_focus) it's OK until I click on the 
column which then keeps the focus.  :-(((

I'm sure I could capture the Return key but I don't want to have this 
dashed line around the focused widget...

I think that this column has somewhere an associated widget but I could 
not find it anywhere (and neither could win.forall).

I'm using PyGTK-2.0.0 and cannot use another version.

Thanks in advance for any idea!
Franck


From alexandre.tp at gmail.com  Tue Feb  8 12:14:20 2005
From: alexandre.tp at gmail.com (top)
Date: 8 Feb 2005 09:14:20 -0800
Subject: variable declaration
In-Reply-To: <1grnpna.dwvqwdn50ot0N%aleaxit@yahoo.com>
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4207fd24@fidonet.org>
	<UmSNd.104914$Jk5.59261@lakeread01>
	<4208178F.40804@po-box.mcgill.ca>
	<mailman.2137.1107832669.22381.python-list@python.org>
	<1grnpna.dwvqwdn50ot0N%aleaxit@yahoo.com>
Message-ID: <1107882860.783420.251410@c13g2000cwb.googlegroups.com>

Alex Martelli wrote:
[snip]
> I disagree: compile time is when the compiler is running (for
example,
> the compiler is the component which diagnoses syntax errors, while
other
> errors are diagnosed ``at runtime'').
[snip]

That thing about syntax errors is news to me. I thought they were
caught at runtime, since you can catch them as exceptions, as in:

try: prijnt projnt
except SyntaxError: print "See, it gets caught"

If this happens at compile-time, I'd like to know how.
Thanks,
--
 - Alexandre



From bill.mill at gmail.com  Tue Feb  8 10:00:00 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Tue, 8 Feb 2005 10:00:00 -0500
Subject: Loop in list.
In-Reply-To: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
References: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
Message-ID: <797fe3d4050208070069be14ae@mail.gmail.com>

Jim,

That is called a "list comprehension", and it is a feature which
appeared in python 2.3 (iirc). Thus if your books are about earlier
versions of python, list comprehensions will not be covered.

Check out the section of the tutorial about them at
http://docs.python.org/tut/node7.html#SECTION007140000000000000000 .

Peace
Bill Mill
bill.mill at gmail.com


On Tue, 08 Feb 2005 06:50:08 -0800 (PST), Jim <jtp11 at att.net> wrote:
> Where did this type of structure come from:
> 
> mat = ['a' for i in range(3)]    ?
> 
> This will produce a list of three elements but
> I don't see reference for it in any of the books.
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From apardon at forel.vub.ac.be  Tue Feb  8 06:50:01 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 8 Feb 2005 11:50:01 GMT
Subject: variable declaration
References: <4202A022.3050209@netscape.net>
	<MSGID_2=3A5025=2F3.131_4204b0a9@fidonet.org>
	<mailman.1978.1107622451.22381.python-list@python.org>
	<slrnd0epjg.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2069.1107783321.22381.python-list@python.org>
	<slrnd0esqn.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2152.1107854937.22381.python-list@python.org>
	<slrnd0h3e9.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2156.1107859510.22381.python-list@python.org>
Message-ID: <slrnd0h9r8.26q.apardon@rcpc42.vub.ac.be>

Op 2005-02-08, Nick Coghlan schreef <ncoghlan at iinet.net.au>:
> Antoon Pardon wrote:
>> I have the impression you are looking at this too much from the view
>> of the current implementation where putting a an entry in
>> a directory is seen as an atomic operation.
>
> Yes and no. I *am* looking at it from an implementation point of view, but 
> dictionaries have nothing to do with the relevant part of the implementation.
>
> The CPython *_FAST opcodes relate to functions' local variables. Behind the 
> scenes they are implemented as integer indexing operations into a pre-sized C 
> array. Operations don't come much faster than that :)

I don't follow. AFAIR my remark here above was about the STORE opcode.
But you seem to react to it as if I am talking about STORE_FAST.

> Could a rebinding operation *theoretically* be quicker for the other cases which 
> involve a real dictionary (or something that looks like one)? Well, perhaps. 
> Although I can't see how the rebinding operation would gain a benefit that a 
> standard binding operation wouldn't gain if placed at the exact same point.

Well it probably wouldn't be quicker, but it wouldn't be slower either
as you asserted earlier.

-- 
Antoon Pardon


From jonas at freesources.org  Thu Feb 24 17:10:48 2005
From: jonas at freesources.org (Jonas Meurer)
Date: Thu, 24 Feb 2005 23:10:48 +0100
Subject: update images inside a mysql database
In-Reply-To: <421E166B.20505@mediapulse.com>
References: <20050224173120.GF4724@resivo.mejo.net>
	<421E166B.20505@mediapulse.com>
Message-ID: <20050224221048.GG4724@resivo.mejo.net>

On 24/02/2005 Gabriel Cooper wrote:
> I've never tried extensively to use images inside a database (too slow 
> for most of my uses), but I thought I'd drop in to point out that you 
> should, for security reasons, be using place holders on your sql. It 
> might just fix your image problem as well, but I don't know.

i don't know what your example changes with using placeholders, as my
version used placeholders as well. anyway, i changed my code to resemble
your version. i still get the same problem:
(cgitb output)

-------SNIP---------
 /home/jonas/public_html/inventaria/mods/backend.py in i_update(image='\xff\xd8\xff\xe0\x00\x10JFIF\x00\x01\x01\x01\x00\x00\x00\x00\x00\x00\xff\xdb\x00C\x00\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01...#$\x82\x08f\xe5A\xc6\xe2G\xe4I\xa9\x18\x96.\xa7\x18T\x0e\x08\xe0\x92q\x9c\x9e\xa4s\xd3\xb7j(\xa0\n\xa4\x95\x00\x03\xdd\x87\xafC\
xefE\x14P\x07\xff\xd9', imgid='18')
  259         o.write(image)
  260         o.close()
  261         db_connect.cursor.execute("""UPDATE Images SET Image=%s WHERE
  262                                 ImgID = %s""" % (image, imgid))
  263
global db_connect = <module 'db_connect' from 'mods/db_connect.pyc'>,
db_connect.cursor = <MySQLdb.cursors.Cursor object>,
db_connect.cursor.execute = <bound method Cursor.execute of <MySQLdb.cursors.Cursor object>>, image = '\xff\xd8\xff\xe0\x00\x10JFIF\x00\x01\x01\x01\x00\x00\x00\x00\x00\x00\xff\xdb\x00C\x00\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01...#$\x82\x08f\xe5A\xc6\xe2G\xe4I\xa9\x18\x96.\xa7\x18T\x0e\x08\xe0\x92q\x9c\x9e\xa4s\xd3\xb7j(\xa0\n\xa4\x95\x00\x03\xdd\x87\xafC\xefE\x14P\x07\xff\xd9', imgid = '18'

 /usr/lib/python2.3/site-packages/MySQLdb/cursors.py in execute(self=<MySQLdb.cursors.Cursor object>, query='UPDATE Images SET Image=\xff\xd8\xff\xe0\x00\x10JFIF\x00\x01\x01\x01\x00\x00\x00\x00\x00\x00\xff\xdb\x00C...\xe0\x92q\x9c\x9e\xa4s\xd3\xb7j(\xa0\ n\xa4\x95\x00\x03\xdd\x87\xafC\xefE\x14P\x07\xff\xd9 WHERE\n\t\t\t\tImgID = 18', args=None)
   93         """
   94         del self.messages[:]
   95         return self._execute(query, args)
   96
   97     def _execute(self, query, args):
self = <MySQLdb.cursors.Cursor object>, self._execute = <bound method Cursor._execute of <MySQLdb.cursors.Cursor object>>, query = 'UPDATE Images SET Image=\xff\xd8\xff\xe0\x00\x10JFIF\x00\x01\x01\x01\x00\x00\x00\x00\x00\x00\xff\xdb\x00C...\xe0\x92q\ x9c\x9e\xa4s\xd3\xb7j(\xa0\n\xa4\x95\x00\x03\xdd\x87\xafC\xefE\x14P\x07\xff\xd9 WHERE\n\t\t\t\tImgID = 18', args = None

[...]

 /usr/lib/python2.3/site-packages/MySQLdb/connections.py in defaulterrorhandler(connection=<_mysql.connection open to 'localhost' at 691500>, cursor=<MySQLdb.cursors.Cursor object>, errorclass=<class _mysql_exceptions.OperationalError>, errorvalue=<_mysql_exceptions.OperationalError instance>)
   31     else:
   32         connection.messages.append(error)
   33     raise errorclass, errorvalue
   34
   35
errorclass = <class _mysql_exceptions.OperationalError>, errorvalue = <_mysql_exceptions.OperationalError instance>

                         OperationalError: (1054, "Unknown column '\xff\xd8\xff\xe0' in 'field list'")
                                 args = (1054, "Unknown column '\xff\xd8\xff\xe0' in 'field list'")
-------SNIP---------
the problem is obviously, that the 'string' Image contains characters
that make it end ealier than expected.

> converting a binary image into a string doesn't seem like it would be 
> wise, but like I said, I've never tried it. At any rate, your function 
> would look like this:

i've been told on #python that unix doesn't differ between binary and
ascii, thus storing binary data should be no problem.

i've no glue about how to solve this problem. even if i use quotation
marks of any kind for the mysql values, what sometimes circumvents the
problem above, at best some some 1000 byte big blob is stored in the
mysql database, what is neither an image nor has the size of my uploaded
image.

any suggestions?

bye
 jonas


From unknownsoldier93 at yahoo.com  Thu Feb 24 20:26:36 2005
From: unknownsoldier93 at yahoo.com (gf gf)
Date: Thu, 24 Feb 2005 17:26:36 -0800 (PST)
Subject: Converting HTML to ASCII
Message-ID: <20050225012637.96824.qmail@web20705.mail.yahoo.com>

Hi.  I'm looking for a Python lib to convert HTML to
ASCII.  Of course, a quick Google search showed
several options (although, I must say, less than I
would expect, considering how easy this is to do in
*other* languages... :| ), but, I have 2 requirements,
which none of them seem to meet:

1) Be able to handle badly formed, or illegal, HTML,
as best as possible.  Some of the converters I tried
ended up dieing on a weird character (that is, a high
ascii char).  Others somehow got confused and dumped
the JavaScript as well.

2) Not embellish the text in any way - no asterisks,
no bracket links, no __ for underlines.

Can anyone direct me to something which could help me
for this?

--Thanks a mil.


		
__________________________________ 
Do you Yahoo!? 
Yahoo! Mail - Helps protect you from nasty viruses. 
http://promotions.yahoo.com/new_mail


From rkern at ucsd.edu  Sat Feb 12 18:19:39 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sat, 12 Feb 2005 15:19:39 -0800
Subject: Hack with os.walk()
In-Reply-To: <mailman.2455.1108248801.22381.python-list@python.org>
References: <200502120000.12086.frans.englich@telia.com>	<culqu5$582$1@sea.gmane.org>
	<mailman.2455.1108248801.22381.python-list@python.org>
Message-ID: <cum2ud$61u$1@news1.ucsd.edu>

Fernando Perez wrote:

> Perhaps this path.py could be considered for inclusion in the stdlib?  I've only
> read the page linked above, so perhaps it can use some polishing.  But it
> certainly looks like a big improvement over the scatterblast which the stdlib
> is on this particular topic.

I'm pretty sure this has been discussed at some point. I completely 
forget the results of said discussion (except the part where it wasn't 
going in yet, although you can't really call that "remembering" so much 
as "deducing from the current state of affairs").

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From news at NOwillmcguganSPAM.com  Thu Feb 17 12:10:29 2005
From: news at NOwillmcguganSPAM.com (Will McGugan)
Date: Thu, 17 Feb 2005 17:10:29 +0000
Subject: Creating properties with decorator like syntax
Message-ID: <4214d006$0$8747$db0fefd9@news.zen.co.uk>

Hi,

Is there any way of making properties using a decorator? The current way 
of creating a property seems inelegant.

Something like this imaginary snippit would be nice, IMHO.

class C(object):
	@make_property
	def x(self):
	    def getx(self): return self.__x
	    def setx(self, value): self.__x = value
	    def delx(self): del self.__x

Regards,

Will McGugan
		


From fuzzyman at gmail.com  Wed Feb  2 06:00:32 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 2 Feb 2005 03:00:32 -0800
Subject: Is this a contradiction in the docs ?
Message-ID: <1107342032.273119.194120@o13g2000cwo.googlegroups.com>

The following two passages from the python documentation *appear* to
contradict each other. Equally possible (or more likely !) is that I
misunderstand it :

eval :
This function can also be used to execute arbitrary code objects (such
as those created by compile()). In this case pass a code object instead
of a string. The code object must have been compiled passing 'eval' as
the kind argument.


compile:
The kind argument specifies what kind of code must be compiled; it can
be 'exec' if string consists of a sequence of statements, 'eval' if it
consists of a single expression, or 'single' if it consists of a single
interactive statement (in the latter case, expression statements that
evaluate to something else than None will be printed).

The docs for compile say that if you are creating a code object from a
sequence of statements you must use the kind argument 'exec'. Eval says
that if you are using the eval function you must use 'eval' as your
kind argument.

In practise I have found that using the eval function with code objects
compiled with 'exec' as the kind argument works fine. Is this a 'bug'
in the docs ?
Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From richardshea at despammed.com  Sun Feb 27 04:21:41 2005
From: richardshea at despammed.com (Richard Shea)
Date: 27 Feb 2005 01:21:41 -0800
Subject: wxPython/IEHtmlWindow documentation (what events are available ?)
Message-ID: <d2a3bd.0502270121.40b81d17@posting.google.com>

Hi - I've got a script which is making use of ...

import  wx.lib.iewin    as  iewin

... and so ...

self.ie = iewin.IEHtmlWindow(self, -1, style =
wx.NO_FULL_REPAINT_ON_RESIZE)

... but I can't find any documentation about what a IEHtmlWindow
object might do - in particular what I might do with the events.

I have some sample code and I've taken a look at iewin.py but what I
would like to know is when the various events are going to fire ?
'DOCUMENTCOMPLETE' seems fairly self-explanatory but others such as
'BEFORENAVIGATE2' and 'STATUSTEXTCHANGE' are less guessable.

I've looked at (what I think is) the MS documentation but I cannot
find references to any of these events - can anyone point me
information please ?

Thanks

Richard.


From ericjardim at gmail.com  Fri Feb 11 09:20:43 2005
From: ericjardim at gmail.com (Eric Jardim)
Date: 11 Feb 2005 06:20:43 -0800
Subject: PyQt documentation
In-Reply-To: <373it0F4uglf9U1@individual.net>
References: <1108088253.552834.44690@z14g2000cwz.googlegroups.com>
	<373it0F4uglf9U1@individual.net>
Message-ID: <1108131643.216301.92510@o13g2000cwo.googlegroups.com>

> You can use the qt c++ doc from trolltech.
> The pyqt bindings are so close to he original that
> you usually can simply use that.

Yes, I currently use it.


>  Additionally, there is a book from boudewijn rempt
> about coding in python+qt which is for qt2, but
> it covers all the signal slot basics and is completely
> available online.

I know the book, too. But It would be more practical to have a
Qtdoc-like for python, don't you think?


> There is an python-based ide which has the same
> name as your first name - try that.

Sure, I use it too. It's great.

The point is that if someone is familiar just to Python and not Qt, or
the reverse, familiar to Qt and not to Python, it is difficult to see
the *little* details of implementation.

I say this because I am familiar to Qt and not much to Python, and
there are simple little mistake I do, that could be avoided if a simple
example explained it. And a searchable API with examples would be
perfect for rapid development.

Think about more *new* people using PyQt. I think PyQt if a great
(actually the gratest ever, IMO) development "enviroment" and as more
people use it, better it gets.

Thats the reason I want to know if there is a "Qtdoc-like" PyQt doc. If
it does not exists, let's make it :)

Wanna join?

[Eric Jardim]



From johnleslie at madasafish.com  Thu Feb 10 08:13:16 2005
From: johnleslie at madasafish.com (John Leslie)
Date: 10 Feb 2005 05:13:16 -0800
Subject: passing arguments like -JOB
Message-ID: <4412dd31.0502100513.7d7418b@posting.google.com>

I am porting a script from Korn Shell to python and want to pass named
parameters like -JOB 123456 -DIR mydir

I can get it to work passing --JOB and --DIR but not -JOB and -DIR

Any ideas?

Current code :

try:
    options, xarguments = getopt.getopt(sys.argv[1:], '', ['JOB=',
'DIR=', 'ERR=', 'GRP=', 'TST=', 'JNM=', 'DAT=',])
except getopt.error:
    print 'Error: You tried to use an unknown option'
    sys.exit(1)
JOB = ''
for o,a in options[:]:
    print 'here2'
    print o
    print a
    if o == '--JOB':
       JOB = a
       print JOB


From fredrik at pythonware.com  Fri Feb 18 05:33:32 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 18 Feb 2005 11:33:32 +0100
Subject: combining several lambda equations
References: <2ae25c6b.0502180224.3d6164a7@posting.google.com>
Message-ID: <cv4g3m$cp3$1@sea.gmane.org>

Paddy McCarthy wrote:

> #If given:two or more lambda equations
> x=lambda : A < B
> y=lambda : C+6 >= 7
>
> How do I create another lambda expression Z equivalent to
>
> Z=lambda : (A<B) and (C+6>=7)
>
> # i.e. the anding together of the originals, but without referencing
> # globals x and y as they are artificial in that I will start of with
> # probably a list of lambda equations.

    x=lambda : A < B
    y=lambda : C+6 >= 7
    Z=lambda x=x, y=y: x() and y()
    del x, y

</F> 





From ramen at lackingtalent.com  Thu Feb  3 11:03:24 2005
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Thu, 03 Feb 2005 16:03:24 -0000
Subject: Type inference, lessons learned from Vyper
Message-ID: <slrnd04iqc.83i.ramen@lackingtalent.com>

Hey all,

I came across a fascinating thread on the Caml mailing list this morning.
It's about writing an interpreter for Python that can do type inference, and
John Skaller shares a lot of his experiences with the Vyper project:

http://groups-beta.google.com/group/fa.caml/browse_frm/thread/4f65d0484529848e/

As you may recall, Vyper was an implementation of Python written in OCaml.
The source code has apparently gone to bit-heaven, but Skaller's analysis
gives some illuminating insight into the kinds of problems we might run into
if Python is to become more statically verifiable.

-- 
 .:[ dave benjamin: ramen/[sp00] -:- spoomusic.com -:- ramenfest.com ]:.
        "talking about music is like dancing about architecture."


From grante at visi.com  Mon Feb 14 17:28:44 2005
From: grante at visi.com (Grant Edwards)
Date: 14 Feb 2005 22:28:44 GMT
Subject: parsing IMAP responses?
References: <42111b20$0$44604$a1866201@visi.com>
	<7x7jlazsyf.fsf@ruckus.brouhaha.com>
Message-ID: <4211261c$0$44604$a1866201@visi.com>

On 2005-02-14, Paul Rubin <http> wrote:

>> Is there a library somewhere that impliments the IMAP protocol
>> syntax?
>
> It's very messy.

It sure is.  You'd think something intended to be
machine-readable would be easier to parse.

> I don't know of one that's in distribution.

That's what I thought based on my Google results, but I thought
I'd ask.

> I think there's one buried inside a certain commercial
> product.  I wrote one a while back that is currently
> inaccessible (disk crash, need to get it recovered) but it's
> not really useable.  IMAP syntax is very very messy. Are you
> trying to write an IMAP server?

No, I'm writing a client, and I was a bit surprised to find out
that imaplib doesn't really parse the responses at all. Since
I'm writing a client I only have to parse the responses to the
commands that I actually send, but it still a bit messy.

-- 
Grant Edwards                   grante             Yow!  I'm an East Side
                                  at               TYPE...
                               visi.com            


From martin at v.loewis.de  Wed Feb 23 18:54:25 2005
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Thu, 24 Feb 2005 00:54:25 +0100
Subject: unicode(obj, errors='foo') raises TypeError - bug?
In-Reply-To: <421d024c$1_1@newspeer2.tds.net>
References: <mailman.2958.1109141791.22381.python-list@python.org>
	<ydWdndBX1-sXrYHfRVn-vQ@comcast.com>
	<421c786a$1_1@newspeer2.tds.net>
	<_vOdnZ_efPnIM4HfRVn-qQ@comcast.com>
	<421ceb68$0$7105$9b622d9e@news.freenet.de>
	<421d024c$1_1@newspeer2.tds.net>
Message-ID: <421d17b1$0$16554$9b622d9e@news.freenet.de>

Kent Johnson wrote:
> Could this be handled with a try / except in unicode()? Something like 
> this:

Perhaps. However, this would cause a significant performance hit, and
possbibly undesired side effects. So due process would require that the
interface of __unicode__ first, and then change the actual calls to it.

> One thing that hasn't been pointed out in this thread yet is that the OP 
> could just define __unicode__() on his class to do what he wants...

Actually, Steven Bethard wrote "You should either define __unicode__ or
call str() manually on the object."

Regards,
Martin


From alan.mcintyre at esrgtech.com  Sun Feb  6 15:09:04 2005
From: alan.mcintyre at esrgtech.com (Alan McIntyre)
Date: Sun, 06 Feb 2005 15:09:04 -0500
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <dvOMd.33656$EG1.19314@lakeread04>
References: <dvOMd.33656$EG1.19314@lakeread04>
Message-ID: <BPuNd.104838$Jk5.57947@lakeread01>

Thanks to everybody that responded; I appreciate all the input, even if 
I didn't respond to all of it individually. :)


From ne-nospam7 at post.cybercity.dk  Wed Feb 23 13:01:48 2005
From: ne-nospam7 at post.cybercity.dk (Nils Emil P. Larsen)
Date: Wed, 23 Feb 2005 19:01:48 +0100
Subject: Comm. between Python and PHP
References: <lnsm11d91ug2gfh5gjvutga4dthhg0rjbf@4ax.com>
	<u3co11t05lh452h17ir7psfgj18rg3lhs4@4ax.com>
Message-ID: <asfp11d9b1jeu0lm4tbquv8gk0heg498va@4ax.com>

Hello

>Python is perfectly capable of generating HTML.  You don't have to demean
>yourself by working in PHP.

Thanks for the tip about using Python instead of PHP to generate web
pages. I may follow it.

Nils Emil
--
My reply-address is valid.           www.bios-flash.dk
Min svar-adresse er gyldig.      Redning af d?de BIOS'er


From deetsNOSPAM at web.de  Fri Feb 18 15:55:31 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 18 Feb 2005 21:55:31 +0100
Subject: re.compile and very specific searches
References: <cv5ba4$nvn$1@solaris.cc.vt.edu>
	<cv5chc$k27$01$1@news.t-online.com>
	<1108758810.163024.169750@g14g2000cwa.googlegroups.com>
Message-ID: <cv5ko2$rcr$00$1@news.t-online.com>

> The OP wanted to "find" IP addresses -- unclear whether re.search or
> re.match is required. Your solution doesn't address the search case.
> For the match case, it needs some augmentation. It will fall apart if
> presented with something like "..." or "comp.lang.python.announce". AND
> while I'm at it ... in the event of a valid string of digits, it will
> evaluate int(d) twice, rather unnecessarily & uglily.


You are right of course. I concentrated on the right value range, but bogus
entries should be dealt with, too.

> ! for s in strings_possibly_containing_digits:
> ! #   if not(s.isdigit() and 0 <= int(s) <= 255): # prettier, but test
> on zero is now redundant
> !     if not s.isdigit() or int(s) > 255:
> 

Instead of this, I'd go for 

def validate_ip4(address):
????digits?=?address.split(".")
????if?len(digits)?==?4:
        try:
    ????????for?d?in?digits:
                d = int(d)
????    ????????if?d?<?0?or?d?>?255:
????????   ??????????return False
            return True
        except ValueError:
             pass
    return False

And I don't think that an isdigit() is necessary faster than int(). The
basically do the same. 

> and the search case: DON'T dump re; it can find highly probable
> candidates (using a regexp like the OP's original or yours) a damn
> sight faster than anything else this side of C or Pyrex. Then you
> validate the result, with a cut-down validator that relies on the fact
> that there are 4 segments and they contain only digits:

The search case needs a regular expression. But the OP didn't say much about
what he actually wants.

-- 
Regards,

Diez B. Roggisch


From mahs at telcopartners.com  Tue Feb  8 13:24:28 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Tue, 08 Feb 2005 10:24:28 -0800
Subject: turing machine in an LC
In-Reply-To: <pan.2005.02.08.12.47.00.135408@jerf.org>
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>	<87mzuf9gu8.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>	<s9zvf93ovp8.fsf@salmakis.intevation.de>
	<pan.2005.02.08.12.47.00.135408@jerf.org>
Message-ID: <cuavuf$d8h$1@sea.gmane.org>

Jeremy Bowers wrote:
> 
> 
> I can't figure out how to write a TM in a Python List Comprehension
> without one of either "variable binding" (so we can store the last symbol
> list and manipulate it in the next iteration) or "recursive function" (to
> express the whole tape as a recursive function), both of which require
> statements. I can figure out how to write a single state transition, but
> in a single LC I can't figure out how to feed the new state into the next
> iteration; the previous values generated in the LC are, to my knowledge,
> not accessible to the LC as it is running. (If they are, I *think* that
> would indeed be enough.)
How about:

 >>> def fact_ge(n):
...     f = [1]
...     f.extend(i*j for i,j in it.izip(xrange(1,1+n), f))
...     return f
...
 >>> fact_ge(10)
[1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800]
 >>>

as a "stateful" genexp?


Michael




From http  Fri Feb  4 21:06:53 2005
From: http (Paul Rubin)
Date: 04 Feb 2005 18:06:53 -0800
Subject: CGI and HTTP Header Location redirects
References: <mailman.1916.1107548836.22381.python-list@python.org>
Message-ID: <7xu0orkbeq.fsf@ruckus.brouhaha.com>

Derek Basch <dbasch at yahoo.com> writes:
> Ahhhh... I should have been more specific before. The Apache error
> log doesn't produce an error. You are probably correct that it is
> most likely an Apache/Unix problem. I thought perhaps someone had
> maybe run into this before since it seems like such a basic function
> to not work. Thanks for the help.

It does sound like something an experienced suexec user might know the
answer to right away.  There are times when I've ended up just running
apache (use the -X option to avoid spawning multiple processes) under
gdb to figure out what was going wrong with whatever file wasn't working.


From cam.ac.uk at mh391.invalid  Tue Feb  8 11:27:20 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Tue, 08 Feb 2005 16:27:20 +0000
Subject: Efficient checksum calculating on lagre files
In-Reply-To: <5o2nd2-5hl.ln1@pluto.i.infosense.no>
References: <5o2nd2-5hl.ln1@pluto.i.infosense.no>
Message-ID: <cuap9d$172$1@gemini.csx.cam.ac.uk>

Ola Natvig wrote:

> Does anyone know of a fast way to calculate checksums for a large file. 
> I need a way to generate ETag keys for a webserver, the ETag of large 
> files are not realy nececary, but it would be nice if I could do it. I'm 
> using the python hash function on the dynamic generated strings (like in 
> page content) but on things like images I use the shutil's 
> copyfileobject function and the hash of a fileobject's hash are it's 
> handlers memmory address.
> 
> Does anyone know a python utility which is possible to use, perhaps 
> something like the md5sum utility on *nix systems.

Is there a reason you can't use the sha module? Using a random large file I had
lying around:

sha.new(file("jdk-1_5_0-linux-i586.rpm").read()).hexdigest() # loads all into memory first

If you don't want to load the whole object into memory at once you can always call out to the sha1sum utility yourself as well.

 >>> subprocess.Popen(["sha1sum", ".bashrc"], stdout=subprocess.PIPE).communicate()[0].split()[0]
'5c59906733bf780c446ea290646709a14750eaad'
-- 
Michael Hoffman


From grante at visi.com  Mon Feb 14 10:37:39 2005
From: grante at visi.com (Grant Edwards)
Date: 14 Feb 2005 15:37:39 GMT
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cup249$svu$1@gemini.csx.cam.ac.uk>
	<cupqb6$1oi$1@usenet.otenet.gr> <cups17$kbs$1@gemini.csx.cam.ac.uk>
	<cupvmh$os2$1@usenet.otenet.gr>
	<mailman.2520.1108379101.22381.python-list@python.org>
	<cuq32h$a3e$1@usenet.otenet.gr>
Message-ID: <4210c5c3$0$41647$a1866201@visi.com>

On 2005-02-14, Ilias Lazaridis <ilias at lazaridis.com> wrote:
> Fredrik Lundh wrote:
>> Ilias Lazaridis wrote
>> 
>>>The idea that the Python Foundation cares about user needs would affect that.
>> 
>> please let the users speak for themselves.
>
> I have.
>
> I've review several threads,publications, actions etc., that show that 
> the users have this need.

This is open source.  You don't just order somebody else to do
what you want. You _do_ it and donate it to the community.

> please review the initial thread with care, i've pointed to
> some documents/thread.

So what?  You want it, you do it.

-- 
Grant Edwards                   grante             Yow!  I'm in ATLANTIC CITY
                                  at               riding in a comfortable
                               visi.com            ROLLING CHAIR...


From myzhang at gmail.com  Sat Feb 19 18:37:43 2005
From: myzhang at gmail.com (myzhang at gmail.com)
Date: 19 Feb 2005 15:37:43 -0800
Subject: socket or xml error?
Message-ID: <1108856263.281602.314860@o13g2000cwo.googlegroups.com>

I got an error as following.  The Server/cllient program was written by
somebody else and supposed to be working before.  Whenever I start a
new client to load xml data from server, the program will fail as:


 File "ShowAllData.py", line 157, in ?
    main(sys.argv)
  File "ShowAllData.py", line 130, in main
    win = MainWindow()
  File "ShowAllData.py", line 63, in __init__
    videoInfo =
CaMLDocumentParser.getVideoInfo(GenericParser.parse(StringIO(result)))
  File "/home/vraid1/mzhang/CaMLServer3/lib/GenericParser.py", line 39,
in parse
    xml.sax.parse (file, g)
  File "/usr/lib/python2.2/site-packages/_xmlplus/sax/__init__.py",
line 31, in parse
    parser.parse(filename_or_stream)
  File "/usr/lib/python2.2/site-packages/_xmlplus/sax/expatreader.py",
line 109, in parse
    xmlreader.IncrementalParser.parse(self, source)
  File "/usr/lib/python2.2/site-packages/_xmlplus/sax/xmlreader.py",
line 123, in parse
    self.feed(buffer)
  File "/usr/lib/python2.2/site-packages/_xmlplus/sax/expatreader.py",
line 220, in feed
    self._err_handler.fatalError(exc)
  File "/usr/lib/python2.2/site-packages/_xmlplus/sax/handler.py", line
38, in fatalError
    raise exception
xml.sax._exceptions.SAXParseException: <unknown>:1:0: not well-formed
(invalid token

Any ideas?

Thanks

Michael



From aleaxit at yahoo.com  Sun Feb  6 04:47:31 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 6 Feb 2005 10:47:31 +0100
Subject: bytecode obfuscation
References: <mailman.1837.1107465982.22381.python-list@python.org>
Message-ID: <1grk5af.1d2132a1az50zmN%aleaxit@yahoo.com>

snacktime <snacktime at gmail.com> wrote:
   ...
> How difficult is it to turn python bytecode into it's original source?

It's pretty easy, not really the original source (you lose comments etc)
but close enough to read and understand.

>  Is it that much different than java (this is what they will probably
> compare it to) ?

It's not very different from Java, or for that matter from C: Python's
bytecode is a bit higher-level than Java's, which is a bit higher level
than typical machine code, but not enough to make a difference if there
is good illicit profit to be made in disassembling and studying it.

> Also, I'm curious how much demand their is for this application in the
> Python world.  The application replaces online credit card

There is as much _wishing_ for magic bullets to slay all monsters, and
magic wands to cure all ills, in the Python world as in others, and
generally just about the same recognition that the magic bullets and
wands are not technically achievable.  You can arrange things so that
somebody wishing to study and reproduce your code will spend 10 hours
instead of 5, maybe (with effort) can go all the way up to making them
spend 20 hours -- but if reproducing that code is worth to them a few
thousand bucks, you're toast anyway.

Whatever code you let out of your control, it WILL get cracked if
there's a profit in cracking it -- and sometimes even if there ain't
(cfr, the cracks of hard-to-crack games abounding on warez sites).

So, if you have any code whose secrecy is important, you just cannot
allow it to get out of your control -- keep it on a solid and closely
guarded server and allow access to it only via well-controlled web
services or the like.  For example:

> processors(Verisign, Authorizenet) by providing a platform that
> connects directly to the bank networks for credit card processing, and

...the code would have to connect (with non-secrecy-critical code) to a
secure server which then does the secrecy-critical connection to the
bank networks -- assuming the secrecy IS critical for that part.

If you're currently distributing that ``secrecy critical'' code as JVM
bytecodes or intel machine code, and there IS indeed a profit to be made
in cracking it, rest assured that it IS cracked, somewhere.


Alex


From alan.mcintyre at esrgtech.com  Fri Feb  4 12:58:21 2005
From: alan.mcintyre at esrgtech.com (Alan McIntyre)
Date: Fri, 04 Feb 2005 12:58:21 -0500
Subject: Learning Python for a new beginner
In-Reply-To: <1107504846.923502.185700@c13g2000cwb.googlegroups.com>
References: <1107504846.923502.185700@c13g2000cwb.googlegroups.com>
Message-ID: <2JOMd.33657$EG1.16706@lakeread04>

Lisa Horton wrote:
> I hear that Python is one of the easiest languages to learn. It is
> easier than PHP or Pearl? Is it as useful as those two? I am attracted
> to Python as a first language, but I just want to be sure I will be
> able to use it.
> 
> Opinions, thoughts, thanks!

I haven't done much with Perl, but I did try to learn enough PHP a 
couple of years ago to do some web development.  It wasn't too bad, but 
it seemed tough to get started for some reason.  My experience with 
Python wasn't like that - it didn't seem to take very long at all to get 
comfortable with it and start using it for real projects at work (maybe 
2-3 months of learning it in my spare time).

I still use Python for >90% of my projects at work.  In over 2 years, I 
haven't run into any situations where I had good reason to choose 
anything else.  The stuff built into the language and the libraries that 
come as part of the standard Python distribution have made my life a lot 
easier than it ever was when I was only using C/C++.

Of course, your mileage may vary, depending on what sort of programming 
you'd like to do. :)

Hope this helps,
Alan McIntyre
http://www.esrgtech.com


From softpro at gmx.net  Sat Feb  5 21:55:27 2005
From: softpro at gmx.net (Johannes Ahl mann)
Date: Sun, 6 Feb 2005 03:55:27 +0100
Subject: bad generator performance
References: <cu402b$83r$00$1@news.t-online.com>
Message-ID: <cu40uv$s4b$02$1@news.t-online.com>

sorry, forgot to post the profiling info for the recursive helper
function.
but generator is still FAR slower...

4095/1    0.050    0.000    0.120    0.120 file.py:135(rek)

Johannes


From steven.bethard at gmail.com  Sun Feb 13 17:16:08 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 13 Feb 2005 15:16:08 -0700
Subject: builtin functions for and and or?
In-Reply-To: <cuoiam$hfv$1@eeyore.INS.cwru.edu>
References: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>
	<cuoiam$hfv$1@eeyore.INS.cwru.edu>
Message-ID: <W4ydnarlcv0_TJLfRVn-3A@comcast.com>

Brian Beck wrote:
> Roose wrote:
> 
>> I need this a lot: a one line way to do a n-ary and or 'or'.
> 
> Here's a one-liner for the n-ary and:
> 
> bool(min(bool(x) for x in L))
> 
> py> bool(min(bool(x) for x in [1, 1, 1, 0]))
> False
> py> bool(min(bool(x) for x in [1, 1, 1, 1]))
> True
> py> bool(min(bool(x) for x in ['a', '', 'b', 'c']))
> False
> py> bool(min(bool(x) for x in ['a', 'b', 'c', 'd']))
> True

Another alternative:

not False in (bool(x) for x in L)

py> not False in (bool(x) for x in [1, 1, 1, 0])
False
py> not False in (bool(x) for x in [1, 1, 1, 1])
True
py> not False in (bool(x) for x in ['a', '', 'b', 'c'])
False
py> not False in (bool(x) for x in ['a', 'b', 'c', 'd'])
True

Note that this should short-circuit, where min won't.

Steve


From tjreedy at udel.edu  Tue Feb  1 22:19:41 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 1 Feb 2005 22:19:41 -0500
Subject: Next step after pychecker
References: <41ff0308$0$6503$636a15ce@news.free.fr>
	<vvadnbwi6_bqjWLcRVn-vQ@comcast.com>
Message-ID: <ctpgrl$d80$1@sea.gmane.org>


"Steven Bethard" <steven.bethard at gmail.com> wrote in message 
news:vvadnbwi6_bqjWLcRVn-vQ at comcast.com...
> I don't know much about what pychecker does, but if it works with the 
> bytecode, shouldn't it be fine for jython and IronPython?  I thought the 
> bytecode was part of the language spec, and what was CPython specific was 
> how the bytecodes were actually implemented...

Nothing about bytecode is part of the language spec.  And CPython bytecode 
is version specific.  If the CPython implementation changed from a virtual 
stack machine to a virtual register machine, as was once discussed, the 
stack-oriented byte code would be replaced by a register-oriented byte code 
or virtual machine language.

Jython compiles Python code to JVM (Java Virtual Machine) bytecode.  Parrot 
compile to Parrot bytecode.  Ironman compiles, I presume, to .Net CL or 
whatever it's called.

Terry J. Reedy





From xah at xahlee.org  Thu Feb 24 06:48:53 2005
From: xah at xahlee.org (Xah Lee)
Date: 24 Feb 2005 03:48:53 -0800
Subject: [perl-python] generic equivalence partition
Message-ID: <1109245733.261643.219420@f14g2000cwb.googlegroups.com>

another functional exercise with lists.

Here's the perl documentation. I'll post a perl and the translated
python version in 48 hours.

=pod

parti(aList, equalFunc)

given a list aList of n elements, we want to return a list that is a
range of numbers from 1 to n, partition by the predicate function of
equivalence equalFunc. (a predicate function is a function that
takes two arguments, and returns either True or False.)

Note: a mathematical aspect: there are certain mathematical constraints
on the a function that checks equivalence. That is to say, if a==b,
then b==a. If a==b and b==c, then a==c. And, a==a. If a equivalence
function does not satisfy these, it is inconsistent and basically give
meaningless result.

example:
parti([['x','x','x','1'],
['x','x','x','2'],
['x','x','x','2'],
['x','x','x','2'],
['x','x','x','3'],
['x','x','x','4'],
['x','x','x','5'],
['x','x','x','5']], sub {$_[0]->[3] == $_[1]->[3]} )

returns
 [[1],['2','3','4'],['5'],['6'],['7','8']];

=cut

In the example given, the input list's elements are lists of 4
elements, and the equivalence function is one that returns True if the
last item are the same.

Note that this is a generic function. The input can be a list whose
elements are of any type. What "parti" does is to return a partitioned
range of numbers, that tells us which input element are equivalent to
which, according to the predicate given. For example, in the given
example, it tells us that the 2nd, 3rd, 4th elements are equivalent.
And they are equivalent measured by the predicate function given, which
basically tests if their last item are the same integer. (note that if
we want to view the result as indexes, then it is 1-based index. i.e.
counting starts at 1.)

PS if you didn't realize yet, nested lists/dictionaries in perl is a
complete pain in the ass.

PS note that the code "sub {$_[0]->[3] == $_[1]->[3]}" is what's called
the lambda form, in Perl.

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From timr at probo.com  Sun Feb 13 03:28:23 2005
From: timr at probo.com (Tim Roberts)
Date: Sun, 13 Feb 2005 00:28:23 -0800
Subject: dos box appears when clicking .pyc
References: <mailman.2426.1108164378.22381.python-list@python.org>
Message-ID: <kh3u01d3ea065j0lcakoq6cv2ff5vperch@4ax.com>

"Philippe C. Martin" <philippecmartin at sbcglobal.net> wrote:
>
>For a few months now, I have been used .pyc script under XP without
>getting the "DOS" box.

You don't usually click on .pyc scripts.  You click on .py and .pyw
scripts.  .pyw files will not bring up a DOS box.

If you really want .pyc files to run without a DOS box, bring up a command
shell and type

    assoc .pyc=Python.NoConFile

(Actually, you should type "assoc .pyw" to make sure that is its file
type.)
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From grante at visi.com  Wed Feb  9 14:29:21 2005
From: grante at visi.com (Grant Edwards)
Date: 09 Feb 2005 19:29:21 GMT
Subject: A great Alan Kay quote
References: <420a5c1e$0$21630$a1866201@visi.com>
	<mailman.2264.1107976858.22381.python-list@python.org>
Message-ID: <420a6491$0$29509$a1866201@visi.com>

On 2005-02-09, James <spiralx at gmail.com> wrote:
> Surely
>
> "Perl is another example of filling a tiny, short-term need, and then
> being a real problem in the longer term."
>
> is better lol ;)

That was the other one I really liked, and Perl was the first
language I thought of when I saw the phrase "agglutination of
features".  C++ was the second one.

-- 
Grant Edwards                   grante             Yow!  -- In 1962, you could
                                  at               buy a pair of SHARKSKIN
                               visi.com            SLACKS, with a "Continental
                                                   Belt," for $10.99!!


From gb at cs.unc.edu  Sat Feb 19 21:41:18 2005
From: gb at cs.unc.edu (Gary Bishop)
Date: 19 Feb 2005 21:41:18 -0500
Subject: pyFMOD writing a callback function in Python
References: <370m88F525p5uU1@individual.net> <brasff8a.fsf@python.net>
	<420bab9a_1@news.unc.edu> <37gi02F56u5rfU1@individual.net>
Message-ID: <4217f8ce_1@news.unc.edu>

I haven't tried it on Linux but I believe it should work. FMOD works on Linux as does Pyrex.
I don't think there is any win32 specific code. Grab the source and try building it. You'll
likely have to fool with the libraries and includes in setup.py.

gb

Marian Aldenh?vel <marian at mba-software.de> wrote:
> Hi,

> > Check out pySonic, a new FMOD wrapper written with Pyrex. Much more Pythonic.

> I have only found Win32-Downloads. The same is true for pyFMOD. What options
> do I have to make it work on Linux?



From ville at spammers.com  Fri Feb 18 02:51:29 2005
From: ville at spammers.com (Ville Vainio)
Date: 18 Feb 2005 09:51:29 +0200
Subject: [Fwd: Re: [Uuu-devel] languages]  <-- Why Python
References: <mailman.2781.1108677768.22381.python-list@python.org>
Message-ID: <du7650q1f26.fsf@mozart.cc.tut.fi>

>>>>> "Arich" == Arich Chanachai <macrocosm at fastmail.fm> writes:

    Arich> From: "Richard Taytor" <dick at gutz.com>
    Arich> To: <uuu-devel at unununium.org>
    Arich> Sent: Thursday, February 17, 2005 4:28 PM
    Arich> Subject: [Uuu-devel] languages


    >> First, thank you for Unununium. I first learned of the project
    >> years ago and I'm happy to see it is alive and well.
    >> 
    >> I'm curious: For the same reasons cited for using Python, why
    >> not use Lisp? I understand that Python is more
    >> popular/pervasive, but if reducing the cognitive load on the
    >> programmers, increasing the elegance and efficiency between
    >> programmer and code, &c., is of primary concern, Lisp (or as
    >> mentioned in the documentation, creating a new language) seems
    >> a better choice (as it appears to me). What do you think?

Essentially this seems like advocacy material for Lisp (doesn't seem
to address any UUU-specific issues, just claims that Lisp is "better"
than Python), and should be treated as such. Go googling for heaps of
Python vs. Lisp material.

Go ahead and learn Lisp - I guess you'll quickly realize that
perfectly rational people may well choose Python for reasons other
than "not knowing Lisp".

-- 
Ville Vainio   http://tinyurl.com/2prnb


From jerf at jerf.org  Fri Feb 11 06:49:36 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 11 Feb 2005 06:49:36 -0500
Subject: namespaces module (a.k.a. bunch, struct, generic object,
	etc.) PEP
References: <GaudndOHLML3M5bfRVn-vg@comcast.com>
	<pan.2005.02.10.15.10.26.594432@jerf.org>
	<4edc17eb.0502110255.1554217b@posting.google.com>
	<mailman.2384.1108124642.22381.python-list@python.org>
Message-ID: <pan.2005.02.11.11.49.35.869566@jerf.org>

On Fri, 11 Feb 2005 22:23:58 +1000, Nick Coghlan wrote:
> This is one of the reasons why Steven's idea of switching to proposing a
> new module is a good one. It then provides a natural location for any
> future extensions of the idea such as Records (i.e. namespaces with a
> defined set of legal fields) and NamedTuples and NamedLists (i.e.
> namespaces with a defined field order)

I'm not very good at reading Guido's mind, but it might be worth feeling
out whether mentioning this will improve the chances of this passing or
not, because while I do not know, can not know, and am not trying to
predict, it is at least possible that Guido may feel as I have been: That
this proposal on its own isn't that exciting, but as the foundation of
some *other* standard functionality as described it might be very good. In
that case that should be emphasized.

See, now it still doesn't make me jump up and down because I can write
what I need fairly easily, but it would be a great boon to beginners or
people who just want to do work and re-write this again, but slightly
differently, and would also provide some standardization where otherwise
we all roll our not-quite-similar-enough implementations, which would help
us read each other's code.

Y'all are bringing me around, slowly but surely :-)


From danperl at rogers.com  Wed Feb  9 23:12:20 2005
From: danperl at rogers.com (Dan Perl)
Date: Wed, 9 Feb 2005 23:12:20 -0500
Subject: newbie question
References: <1107990182.516041.120410@o13g2000cwo.googlegroups.com>
	<seudnRY79e_AXJffRVn-pg@rogers.com> <feuqd2-bqv.ln1@lairds.us>
Message-ID: <9tidneo6EZm1QpffRVn-sg@rogers.com>


"Cameron Laird" <claird at lairds.us> wrote in message 
news:feuqd2-bqv.ln1 at lairds.us...
> In article <seudnRY79e_AXJffRVn-pg at rogers.com>,
> Dan Perl <danperl at mail-me.com> wrote:
> .
> .
> .
>>has the conciseness of the C statement.  The pre- and post-increment
>>and -decrement in C/C++/Java are very powerful and I miss them in python.
>
> Me, too.
>
> Which is, I suspect, evidence for the incompleteness of our Pythonhood.
> As Peter Hansen already hinted in this thread, an appetite for the
> increment and related operators probably is a symptom that there's an
> opportunity nearby to use an iterator or string method or such.  C++
> and Java wish they had it so good.

I can't say that is not part of the reason, but the example in the OP is a 
clear illustration of cases where something like an increment/decrement 
operator would be very useful.  OTOH, I was thinking of saying in my 
previous posting that I prefer
    for n in range(start, 0, -1):
to
    n = start
    while (n--)
I think that the first form is more readable, although that may be just me. 
I would actually even prefer the 'for' statement in C to the 'while' 
statement:
    for (n=start; n<=0; n--) 




From BOOGIEMANPN at YAHOO.COM  Thu Feb 10 10:59:04 2005
From: BOOGIEMANPN at YAHOO.COM (BOOGIEMAN)
Date: Thu, 10 Feb 2005 16:59:04 +0100
Subject: goto, cls, wait  commands
Message-ID: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>

I've just finished reading Python turtorial for non-programmers
and I haven't found there anything about some usefull commands I used in
QBasic. First of all, what's Python command equivalent to QBasic's "goto" ?
Secondly, how do I clear screen (cls) from text and other content ?
And last, how do I put program to wait certain amount of seconds ?
If I remeber correctly I used to type "Wait 10" and QBasic waits 
10 seconds before proceeding to next command.


From rkern at ucsd.edu  Mon Feb 14 23:56:51 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 14 Feb 2005 20:56:51 -0800
Subject: image fourier transform
In-Reply-To: <curv39$jsl$01$1@news.t-online.com>
References: <curv39$jsl$01$1@news.t-online.com>
Message-ID: <curvek$t9a$1@news1.ucsd.edu>

Johannes Ahl-mann wrote:
> hi,
> 
> i've been looking all around the net (google is my friend ;-) for a
> module to apply fourier transformations on images. the different ones in
> numerical python and scientific python seem all to be operating on
> sequences and therefore seem to be 1D fourier transform.

Huh? From the FFT module which comes with Numeric:

In [1]: import FFT

In [2]: FFT.fft2d?
Type:           function
Base Class:     <type 'function'>
String Form:    <function fft2d at 0x1444fb0>
Namespace:      Interactive
File:           /platlib/Numeric/FFT/FFT.py
Definition:     FFT.fft2d(a, s=None, axes=(-2, -1))
Docstring:
     fft2d(a, s=None, axes=(-2,-1))

     The 2d fft of a. This is really just fftnd with different default
     behavior.


-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From fredrik at pythonware.com  Mon Feb 21 05:01:18 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 21 Feb 2005 11:01:18 +0100
Subject: Moving to Python from PHP - 3 questions
References: <mailman.2873.1108931203.22381.python-list@python.org>	<cvat62$9h0$05$1@news.t-online.com><f2582bbd378120970423d611a09d2789@teczno.com>
	<42191783.2000608@joefrancia.com>
Message-ID: <cvcbab$j3j$1@sea.gmane.org>

Joe Francia wrote:

> You'll also want to probably look at some of the templating kits, of which Cheetah and/or 
> ElementTree work best for me.  (Well, ElementTree isn't exactly a templating kit - it's a 
> general-purpose XML tookit - but it is easily used for templating.)

if you want element-based templating, see:

    http://lesscode.org/projects/kid/

</F> 





From x2164 at mailcity.com  Fri Feb  4 10:12:22 2005
From: x2164 at mailcity.com (x2164 at mailcity.com)
Date: 4 Feb 2005 15:12:22 GMT
Subject: test_socket.py failure
References: <ctinqv0c1a@news4.newsguy.com>
	<mailman.1630.1107173295.22381.python-list@python.org>
	<ctmpr3025eh@news2.newsguy.com>
	<mailman.1723.1107313414.22381.python-list@python.org>
	<ctqpak01igc@news4.newsguy.com>
	<n5f7d2-aub.ln1@halut.solar-empire.de>
	<ctsh0702qca@news2.newsguy.com>
	<mailman.1809.1107431480.22381.python-list@python.org>
Message-ID: <cu03cm030a4@news3.newsguy.com>

Nick Coghlan <ncoghlan at iinet.net.au> wrote:
> x2164 at mailcity.com wrote:
> >      Marc, it is possible that there was a change between 
> >      glibc-2.2.4 and 2.2.5 that would account for the 
> >      difference in behaviour.  I think i'll write a little
> >      test program in C to check out getservbyname's return
> >      values in a little more controled environment.  I'll
> >      post the results tomorrow.

> The other question is which C library Python is actually
> using on your system. 
> Maybe it's picking up whatever installed the funky man page
> which doesn't 
> mention NULL proto arguments.

> So, find your Python 2.4 binary and run "ldd python24" to
> see which shared C 
> library it is linking to.

> For me, it's /lib/tls/libc.so.6. Running that library directly
> prints out the 
> message about GNU C library 2.3.3.


     hey Nick,


     The man pages are probably from orignal system installation
     so i used your ldd technique which says that the python
     executable was compiled against glibc-2.2.5.

     I'm going to check the diff for 2.2.4-2.2.5 and look for
     anything getservbyname related.

     Below i'm including the source code for a little
     program to exercise getservbyname.  On this system
     if 'NULL' is passed as the protocal then 'NULL' is
     returned.

     I wonder if writing some code around the call to
     getservbyname in Modules/socketmodule.c to test
     for a call with the NULL argument would be
     appropriate.  Could you show the output from my
     included program when NULL is passed as
     an argument?  Probably would be good to know
     what the call returns on your system before
     trying to get mine to mimic it.


     Ok, back to grep'ing.


     pete jordan
     x2164 mailcity com






/*
 *    This program just test what happens when getservbyname
 *    is passed a NULL pointer argument for the name and proto
 *    paramenters.
 * 
 *    The compilation line i used:
 *
 *            gcc getserv.c -o getserv
 *
 *    and just type 'getserv' at a prompt.
 *
 *    Just pass 'service name, protocol name' to
 *    'get_print' to check if combination is found.
 */


#include <stdio.h>
#include <netdb.h>
#include <netinet/in.h>


void get_print( const char *, const char * );

int main()
    {
	get_print( "daytime", "tcp" );
	get_print( "daytime", "udp" );
	get_print( "daytime", NULL );
	get_print( NULL, "tcp" );
	get_print( NULL, NULL );
	get_print( "ithkl", "tcp" );
	get_print( "echo", "ddp" );

	return ;
    }



void get_print( const char *name, const char *proto )
    {
	struct servent    *result = NULL ;

	result = getservbyname( name, proto );

	printf( "\n  getservbyname call:  getservbyname( %s , %s ) \n",
                 name, proto ); 

	printf("  getservbyname returned:\n");
	
	if ( result == NULL )
	       printf("\t\t\t   NULL - end of 'services' file reached or\n"
                      "\t\t\t          error occured.\n\n");
	   else
	     {
	       printf( "\t\t\t   s_name = %s \n", result->s_name );
	       printf( "\t\t\t   s_port = %d \n", ntohs(result->s_port) );
	       printf( "\t\t\t   s_proto = %s \n", result->s_proto );
	       printf( "\n" );
	      }

    }



From lkirsh at cs.ubc.ca  Wed Feb 23 04:57:05 2005
From: lkirsh at cs.ubc.ca (Lowell Kirsh)
Date: Wed, 23 Feb 2005 01:57:05 -0800
Subject: how can I make this script shorter?
In-Reply-To: <1109069688.328226.89190@g14g2000cwa.googlegroups.com>
References: <cveqr1$a47$1@mughi.cs.ubc.ca>
	<1109069688.328226.89190@g14g2000cwa.googlegroups.com>
Message-ID: <cvhk1h$142$2@mughi.cs.ubc.ca>

Thanks for the advice. There are definitely some performance issues I 
hadn't thought of before. I guess it's time to go lengthen, not shorten, 
the script.

Lowell

John Machin wrote:
> Lowell Kirsh wrote:
> 
>>I have a script which I use to find all duplicates of files within a
>>given directory and all its subdirectories. It seems like it's longer
> 
> 
>>than it needs to be but I can't figure out how to shorten it. Perhaps
> 
> 
>>there are some python features or libraries I'm not taking advantage
> 
> of.
> 
>>The way it works is that it puts references to all the files in a
>>dictionary with file size being the key. The dictionary can hold
>>multiple values per key. Then it looks at each key and all the
>>associated files (which are the same size). Then it uses filecmp to
> 
> see
> 
>>if they are actually byte-for-byte copies.
>>
>>It's not 100% complete but it's pretty close.
>>
>>Lowell
> 
> 
> To answer the question in the message subject: 1,$d
> 
> And that's not just the completely po-faced literal answer that the
> question was begging for: why write something when it's already been
> done? Try searching this newsgroup; there was a discussion on this very
> topic only a week ago, during which the effbot provided the URL of an
> existing python file duplicate detector. There seems to be a discussion
> every so often ...
> 
> However if you persist in DIY, read the discussions in this newsgroup,
> search the net (people have implemented this functionality in other
> languages); think about some general principles -- like should you use
> a hash (e.g. SHA-n where n is a suitably large number). If there are N
> files all of the same size, you have two options (a) do O(N**2) file
> comparisons or (b) do N hash calcs followed by O(N**2) hash
> comparisons; then deciding on your
> need/whim/costs-of-false-negatives/positives you can stop there or you
> can do the file comparisons on the ones which match on hashes. You do
> however need to consider that calculating the hash involves reading the
> whole file, whereas comparing two files can stop when a difference is
> detected. Also, do you understand and are you happy with using the
> (default) "shallow" option of filecmp.cmp()?
> 


From michele.petrazzo at TOGLIunipex.it  Fri Feb  4 04:25:29 2005
From: michele.petrazzo at TOGLIunipex.it (Michele Petrazzo)
Date: Fri, 04 Feb 2005 10:25:29 +0100
Subject: ANN: PyDev 0.9.0 released
In-Reply-To: <mailman.1829.1107453373.22381.python-list@python.org>
References: <mailman.1829.1107453373.22381.python-list@python.org>
Message-ID: <42033f8a$0$32355$5fc30a8@news.tiscali.it>

Fabio Zadrozny wrote:
> Hi All,
> 
> PyDev - Python IDE (Python development enviroment for Eclipse) version 
> 0.9.0 has just been released.
> 
> This release supports python 2.4 and has PyLint 0.6 integrated.
> Code completion had some improvements too.
> 
> Check the homepage for more details (http://pydev.sourceforge.net/).
> 
> Regards,
> 
> Fabio Zadrozny
> ------------------------------------------------------
> Software Developer
> ESSS - Engineering Simulation and Scientific Software
> www.esss.com.br
> 

This page on your site, don't exist!

http://pydev.sourceforge.net/Features.html

modify the link in:

http://pydev.sourceforge.net/features.html

Bye,
Michele


From jerf at jerf.org  Fri Feb  4 10:27:20 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 04 Feb 2005 10:27:20 -0500
Subject: string issue
References: <cu0i3o$jc6$1@solaris.cc.vt.edu> <R4QMd.33663$EG1.10366@lakeread04>
	<cu0jkn$kf7$3@solaris.cc.vt.edu>
Message-ID: <pan.2005.02.04.15.27.19.969247@jerf.org>

On Fri, 04 Feb 2005 14:49:43 -0500, rbt wrote:

> Alan McIntyre wrote:
>> I think it's because you're modifying the list as you're iterating over 
> 
> In this case then, shouldn't my 'except Exception' raise an error or 
> warning like:
> 
> "Hey, stupid, you can't iterate and object and change it at the same time!"

But you can do that, so why should it?

Certain operations are dangerous, but, well, it's impossible to enumerate
all the dangerous things and it's better to not give people false
assurances when they find one of them that slipped by.

One idiom that does what you want, though it doesn't always work for all
situations, is to iterate over the list backwards. If you're only removing
a few items from a short list, that can be faster than building a new one.
However, removing items gets to be n^2 pretty fast, so it can be better to
build a new list, which the list comprehensions make easy:

newList = [x for x in oldList if myCondition(x)]



From aahz at pythoncraft.com  Tue Feb 15 20:14:51 2005
From: aahz at pythoncraft.com (Aahz)
Date: 15 Feb 2005 20:14:51 -0500
Subject: __new__ does not call __init__ as described in descrintro.html
 (WAS: Can __new__ prevent __init__ from being called?)
References: <pvWdnUJ3hIROBo_fRVn-jw@comcast.com>
Message-ID: <cuu6qb$c21$1@panix2.panix.com>

In article <pvWdnUJ3hIROBo_fRVn-jw at comcast.com>,
Steven Bethard  <steven.bethard at gmail.com> wrote:
>
>Yeah, I saw the same thing in playing around with this.  Don't know
>what to make of it.  I wonder if we should file a documentation bug?  I
>can't find __new__ explained anywhere in the Language Reference.  Can
>documentation bugs be filed for descrintro.html?

Absolutely!  And they're especially welcome if they contain suggested
replacement text.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From ncoghlan at iinet.net.au  Thu Feb 17 05:54:12 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Thu, 17 Feb 2005 20:54:12 +1000
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <37hippF4gcimiU1@individual.net>
References: <37hippF4gcimiU1@individual.net>
Message-ID: <421477D4.2050305@iinet.net.au>

Leo Breebaart wrote:
> All I've been able to find is a 1999 python-dev post by Tim
> Peters which would seem to indicate he doesn't understand it
> either:
> 
>     "string.join(seq) doesn't currently convert seq elements to
>      string type, and in my vision it would. At least three of us
>      admit to mapping str across seq anyway before calling
>      string.join, and I think it would be a nice convenience
>      [...]"
> 
> But now it's 2005, and both string.join() and str.join() still
> explicitly expect a sequence of strings rather than a sequence of
> stringifiable objects.

There's a more recent discussion than that, because I tried to change it shortly 
after I offered a patch to fix a corner case for string subclasses.

This seems to be the last relevant message in the thread:
http://mail.python.org/pipermail/python-dev/2004-August/048516.html

So it was tried, but we found too many weird corner cases we weren't quite sure 
what to do with. At that point, "explicit is better than implicit" kicked in :)

A shame, since it was both faster and more convenient than using a list comp. 
But the convenience wasn't worth the ambiguity of the semantics.

Cheers,
Nick.

P.S. For anyone else that uses Firefox:

Linking the pydev keyword to
"http://www.google.com/search?q=site:mail.python.org+inurl:python-dev+%s"

and the pylist keyword to
"http://www.google.com/search?q=site:mail.python.org+inurl:python-list+%s"

makes searching the archives on python.org really easy. Of course, knowing what 
you're looking for because you were a participant in the discussion helps, too ;)

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From francis.girard at free.fr  Sun Feb 13 12:48:03 2005
From: francis.girard at free.fr (Francis Girard)
Date: Sun, 13 Feb 2005 18:48:03 +0100
Subject: A great Alan Kay quote
In-Reply-To: <slrnd0q67t.52v.curty@einstein.electron.net>
References: <420a5c1e$0$21630$a1866201@visi.com>
	<mailman.2332.1108063164.22381.python-list@python.org>
	<slrnd0q67t.52v.curty@einstein.electron.net>
Message-ID: <200502131848.03655.francis.girard@free.fr>

Le vendredi 11 F?vrier 2005 21:45, Curt a ?crit?:
> On 2005-02-10, Francis Girard <francis.girard at free.fr> wrote:
> > I think I've been enthouasistic too fast. While reading the article I
> > grew more and more uncomfortable with sayings like :
>
> <snip>
>
> Yes, you may have grown uncomfortable because what you "read" has, at best,
> only the most tenuous of relations with what was written.  There is no way
> in God's frigid hell that your "sayings" (which were never uttered by Alan
> Kay) can be construed as anything other than a hopefully transient
> psychotic episode by anyone who read the interview with his head in a place
> other than where the moon doesn't shine.
>
> Please be so kind as to free your own from the breathless confines of your
> own fundamental delirium.

Wow ! Peace. I apologize. Didn't want to upset anyone. Of course it was my own 
ad lib interpretation of what Alan Kay said. That's what I meant by 
"sayings". But I should had been clearer. Anyway, it only implies myself.

I live at a place where it rains most of the time and my head is indeed in a 
place where the moon doesn't shine, which may give a good explanation of my 
own fundamental delirium. 

For another fundamental delirium (which I certainly enjoy), see :

Steve Wart about "why Smalltalk never caught on":

http://hoho.dyndns.org/~holger/smalltalk.html

as someone named "Petite abeille" (a name I also certainly do find full of 
flavour) suggested me.

My deepest apologies,

Francis Girard



From kuljo at freemail.hu  Tue Feb  1 17:36:36 2005
From: kuljo at freemail.hu (Lajos Kuljo)
Date: Tue, 01 Feb 2005 23:36:36 +0100
Subject: MySQLdb - Tuples
Message-ID: <3vTLd.19498$Of5.13133@nntpserver.swip.net>

Hallo,
ich bin voll neu im Python-Programming, deshalb ist mein Problem 
wahrscheinlich trivial:

Wenn ich die Script
#########################################33
#! /usr/bin/env python
import MySQLdb
db=MySQLdb.connect(host='localhost', db='photum_0_6_2', user='root', 
passwd='thkhgfgd')
c=db.cursor()
c.execute('select person from persons order by person')
tup=c.fetchall()
for a in tup:
   print a
################################################
ausf?hre, erhalte ich Dinge wie
('Dieter',)
('Hulda',)
....

Ich brauche die Klammern, Apostrphe und Kommas nicht (ich will nur die 
Inhalte) und kann ich sie nicht loswerden. Versucht habe ich u. a. print 
a[2:-3] was nur zwei Klammern bringt.
b=lstrip(a, "(") haut auch nicht hin.
Weiss jemand Rat?

P.S. Woher kommen diese Klammern und Apostrophen, vom MySQLdb?


From ggrp1.20.martineau at dfgh.net  Sun Feb 20 17:08:07 2005
From: ggrp1.20.martineau at dfgh.net (Martin Miller)
Date: 20 Feb 2005 14:08:07 -0800
Subject: Test for structure
References: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
	<mailman.2824.1108792560.22381.python-list@python.org>
Message-ID: <1108937287.079367.276910@g14g2000cwa.googlegroups.com>

I don't believe you can use the test for a __iter__ attribute in this
case, for the following reason:
>>> c1 = 'abc'
>>> c2 = ['de', 'fgh', 'ijkl']
>>> hasattr(c1, '__iter__')
False
>>> hasattr(c2, '__iter__')
True
>>> for i in c1: print "i=%s is an element of c1" % repr(i)
...
i='a' is an element of c1
i='b' is an element of c1
i='c' is an element of c1

In other words, even though the c1 single string variable does not have
an __iter__ attribute, it can still be used in a for loop. I think the
right answer would depend on what exactly the OP intends to do with the
argument when it is a list (or is list-like in some way) -- i.e. he
didn't say specifically that he wanted use it in a for loop.

-Martin


====================
Terry Hancock wrote:
> On Wednesday 16 February 2005 09:08 am, alex wrote:
> > how can I check if a variable is a structure (i.e. a list)? For my
> > special problem the variable is either a character string OR a list
of
> > character strings line ['word1', 'word2',...]
> >
> > So how can I test if a variable 'a' is either a single character
string
> > or a list?
>
> The literally correct but actually wrong answer is:
>
> if type(a) == type([]):
>     print "'a' is a duck"
>
> But you probably shouldn't do that. You should probably just test to
> see if the object is iterable --- does it have an __iter__ method?
>
> Which might look like this:
>
> if hasattr(a, '__iter__'):
>     print "'a' quacks like a duck"
>
> That way your function will also work if a happens to be a tuple,
> a dictionary, or a user-defined class instance which is happens to
> be  iterable.
>
> Being "iterable" means that code like:
>
> for i in a:
>    print "i=%s is an element of a" % repr(i)
>
> works.  Which is probably why you wanted to know, right?
>
> Cheers,
> Terry
>
> --
> --
> Terry Hancock ( hancock at anansispaceworks.com )
> Anansi Spaceworks  http://www.anansispaceworks.com



From noway at sorry.com  Sat Feb 12 19:43:54 2005
From: noway at sorry.com (Giovanni Bajo)
Date: Sun, 13 Feb 2005 00:43:54 GMT
Subject: PyINI : Cross-Platform INI parser
References: <cuhiak$2gl8$1@mail.cn99.com>
	<3f_Od.26957$QG6.468964@twister2.libero.it>
	<vf8ze8aa.fsf@python.net>
Message-ID: <epxPd.29783$lB4.806235@twister1.libero.it>

Thomas Heller wrote:

>>> I have released a simple alpha version, which can read *.ini, with
>>> some extended features such as "key=value1,value2,value3". I also
>>> made a c++ binding to PyINI with elmer toolkit.
>>
>>
>> The most useful feature would be to be able to write INI files back
>> without affecting their formatting, without removing user commands,
>> etc. This is what Windows APIs do, and it is what I am missing from
>> most INI parsing libraries out there.
>
> You can easily access the windows apis either with pywin32, or with
> ctypes for those functions that aren't wrapped in pywin32.

Sure, but we were speaking of doing that in a portable library.
-- 
Giovanni Bajo




From Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org  Sat Feb  5 08:42:01 2005
From: Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org (Alexander)
Date: Sat, 05 Feb 2005 16:42:01 +0300
Subject: variable declaration
References: <1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
Message-ID: <MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>

Hi, Alex!

05 feb 2005 at 12:52, Alex Martelli wrote:
 >> declarations, another (this problem is common with C/C++)
 >> is: === print 1/2 0 === (I understand why it is so, but I don't like
 >> it anyway. Such behaviour also can cause some hard-to-find-bugs)
 AM> You're conflating a fundamental, crucial language design choice, with
 AM> a rather accidental detail
It's not my problem:) I just wrote about two things that I don't like.
 AM> Run Python with -Qnew to get the division behavior you probably want,
 AM> or -Qwarn to just get a warning for each use of integer division so
 AM> those hard to find bugs become trivially easy to find.
Thank you. It will help me.

 AM> The fact that in Python there are ONLY statements, NO declarations,
===
def qq():
 global z
 z=5
===
What is "global"? Statement? Ok, I fill lack of "var" statement:)

 AM> is a completely different LEVEL of issue -- a totally deliberate
 AM> design choice taken in full awareness of all of its implications.  I
 AM> do not see how you could be happy using Python if you think it went
 AM> wrong in such absolutely crucial design choices.

Ok, I understand your position.

 >>  >> errors,like this: epsilon=0 S=0 while epsilon<10:
 >>  >> S=S+epsilon epselon=epsilon+1 print S It will print zero, and it
 >>  >> is not easy to find such a bug!
 >>  AM> Actually, this while loop never terminates and never prints
 >>  AM> anything,
 >> Oh, I don't find it:)
 AM> Hit control-C (or control-Break or whatever other key combination
 AM> interrupts a program on your machine) when the program is just
 AM> hanging there forever doing nothing, and Python will offer a
 AM> traceback showing exactly where the program was stuck.
 AM> In any case, you assertion that "it will print zero" is false.  You
 AM> either made it without any checking, or chose to deliberately lie (in
 AM> a rather stupid way, because it's such an easy lie to recognize as
 AM> such).
Sorry, while saying "I don't find it" I mean "I don't take it into account at
time I wrote original message. Now I find it, and it make me smile.". As you
understand, I'am not very good in English.

 >> Fine! Let interpreter never show us errors like division by zero,
 >> syntax errors, and so on. If file not found, library don't need to
 >> say it. Just skip it!!! Because every, even simple, test will find
 >> such bugs. Once you have unit tests, the added value of <anything>
 >> is tiny, and their cost remains.
 AM> Another false assertion, and a particularly ill-considered one in ALL
 AM> respects. Presence and absence of files, for example, is an
 AM> environmental issue, notoriously hard to verify precisely with unit
 AM> tests.  Therefore, asserting that "every, even simple, test will find"
 AM> bugs connected with program behavior when a file is missing shows
 AM> either that you're totally ignorant about unit tests (and yet so
 AM> arrogant to not let your ignorance stop you from making false
 AM> unqualified assertions), or shamelessly lying.

Here, you take one detail and bravely fight with it. Just try to understand
meaning of my sentence, in all. It will help:)

 AM> Moreover, there IS no substantial cost connected with having the
 AM> library raise an exception as the way to point out that a file is
 AM> missing, for example.  It's a vastly superior approach to the old idea
 AM> of "returning error codes" and forcing the programmer to check for
 AM> those at every step.  If the alternative you propose is not to offer
 AM> ANY indication of whether a file is missing or present, then the cost
 AM> of THAT alternative would most obviously be grievous -- essentially
 AM> making it impossible to write correct programs, or forcing huge
 AM> redundancy if the check for file presence must always be performed
 AM> before attempting I/O.
 AM> In brief: you're not just wrong, you're so totally, incredibly,
 AM> utterly and irredeemably wrong that it's not even funny.
Hey, take it easy! Relax, reread that piece of text. It was written with smile
on my lips. Here it is for your convenience:
========
 AM> And once you have unit tests, the added value of declarations is
 AM> tiny, and their cost remains.

Fine! Let interpreter never show us errors like division by zero, syntax
errors, and so on. If file not found, library don't need to say it. Just skip
it!!! Because every, even simple, test will find such bugs. Once you have unit
tests, the added value of <anything> is tiny, and their cost remains.
========

Again, skip small details and take a look on the problem "in general". Here is,
again, the main idea:
========
Or, maybe, we will ask interpreter to find and prevent as many errors as he
can?
========

You wrote about "substantial cost" of var declarations. Yes, you are write. But
think about the cost of lack of var declarations. Compare time that programmer
will waste on search for the reason of bug caused by such typo, plus time what
programmer will waste while remembering exact variable name.

Compare it with time for looking on message:
===
Traceback (most recent call last):
  File "<pyshell#16>", line 5, in -toplevel-
    epselon
NameError: name 'epselon' is not defined, in strict mode
===
and fixing it, plus time on typing three letters (or less).

 >> And, one more question: do you think code like this:
 >>
 >> var S=0
 >> var eps
 >> for eps in xrange(10):
 >>   S=S+ups
 >>
 >> is very bad? Please explain your answer:)
 AM> Yes, the many wasted pixels in those idiotic 'var ' prefixes are a
 AM> total and utter waste of programmer time.

Hmmm, that code is not so pretty. Lets change it a little bit:

  var S,eps
  S=0
  for eps in xrange(10):
    S=S+ups

I think it is look well.

 AM> Mandated redundancy, the very opposite of the spirit of Python.
 >> Uh! And you! And you!... And you must never even come close to any
 >> languages with variable declaration! Even to Visual Basic! :)
 AM> Wrong again.  I've made a good living for years as a C++ guru, I
 AM> still cover the role of C++ MVP for the Brainbench company, I'm
 AM> (obviously) totally fluent in C (otherwise I could hardly contribute
 AM> to the development of Python's C-coded infrastructure, now could I?),
 AM> and as it happens I have a decent command (a bit rusty for lack of
 AM> recent use) of dozens of other languages, including several Basic
 AM> dialects and Visual Basic in particular.
 AM> It should take you about 20 seconds with Google to find this out
 AM> about me, you know?  OK, 30 seconds if you're on a slow dialup modem
 AM> line.
Ok, your are really cool guy. Also, I appreciate your contribution to Python's
C infrastructure. I'am not as cool as you, but Python is not my first language
too:)

Alexander, zatv at bk.ru
---url: alex-zatv.narod.ru


From gb at cs.unc.edu  Sat Feb  5 19:10:07 2005
From: gb at cs.unc.edu (Gary Bishop)
Date: 5 Feb 2005 19:10:07 -0500
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot>
	<mailman.1865.1107491434.22381.python-list@python.org>
	<opsln54fpwej1m1c@ashot> <36hculF51ho2sU1@individual.net>
	<1107530489.308497.103530@g14g2000cwa.googlegroups.com>
	<36hrjpF4ui8fbU1@individual.net>
	<mailman.1911.1107546744.22381.python-list@python.org>
	<36i84qF52ce29U1@individual.net> <opslo127s7ej1m1c@ashot>
	<cu0umf$cja$1@sea.gmane.org>
	<mailman.1936.1107561113.22381.python-list@python.org>
	<opslo7jfhqej1m1c@ashot> <36l1dgF52b9d6U1@individual.net>
Message-ID: <4205605f_2@news.unc.edu>

Claudio Grondi <claudio.grondi at freenet.de> wrote:
> "Ashot" <ashot at removemolsoftthis.com> schrieb im Newsbeitrag
> news:opslo7jfhqej1m1c at ashot...
> > whoa, that was quick, looks like it works for me.  Thanks a lot!
> > It would be nice to be able to set the colors in the prefs file, although
> > its possible to edit the pyColorize file as Claudio mentioned.
> To get the coloured texts on a grey (instead of white) background
> I have extended the Console.py to accept sequences as e.g.
>   "0;33;47" (see attachment)
> have extended also the
>   def make_color_table(in_class):
> in the ColorANSI.py of IPython
> and adjusted the pyColorize.py file, but it had not the desired effect.
> IPython seems not to be sending to Console.py the sequences
> defined in the

The problem *may* be the way I insert the background color in
Console.py. I simply hacked it to OR the initial value into the colors
I get out of my table. If you want to have some colors with the
background set, then we'd need to work out a way to signal
that. Perhaps instead of or'ing in the value all the time, we should
insert the background value into the table entries that don't specify
the background.

I'm happy to see someone hacking on it. The source is all there and it
is all Python. The Win32 API stuff is ugly but well documented online.

If you change the "if 0:" up at the top of Console.py to "if 1:"
you'll get a file debug.txt with the contents of the various calls to
"log". That way you can "print" stuff from within console without
messing up the window.

gb



From mt at 3planes.com  Sun Feb  6 23:34:22 2005
From: mt at 3planes.com (Michael Tobis)
Date: 6 Feb 2005 20:34:22 -0800
Subject: declarations summary
Message-ID: <1107750862.485179.61980@c13g2000cwb.googlegroups.com>

Summary of my understanding of a recent interesting thread:

General usage has "declaration" meaning "statement which does not
generate executable bytecode but merely affects the compiler". My
assertion that decorator syntax is "declarative" is therefore formally
false.

The common assertion that "Python is 100% executable" is an
exageration, but not because of the introduction of decorator syntax.
The "global" statement, however is not executable and is recognized as
a declaration.

Both "global" and "@", though have the characteristics that 1) they
don't fit comfortably into Python syntax and 2) they at least
conceptually affect the reference and not the referent. In suport of
the first point, unlike any other block, decorators can appear at only
particular places in the file. Meanwhile globals are counterintuitively
 indifferent to whether they are nested in code branches that don't
execute.

.x = 1
.def foo():
.   if False:
.      global x
.   x = 2
.foo()
.print x

prints "1"

These are implemented in different ways and both seem to be somehow
unsatisfactory. They also seem to have something in common. However,
for me to call them both "declarations" was incorrect.

Pythonistas appear to be averse to any declarations (in the sense of
compiler directives) besides "global".

The resistance to "@" is a lost cause, even though a dramatically
superior
def foo(a,b,c) decoby bar"
syntax was proposed. I find this hard to justify, as a deocrator is
clearly a modifier of an immediately following function declaration
rather than a freeestanding executable block.

If it were feasible,I'd even prefer
def foo(a,b,c) decoby [baz,quux]:
so that the list of decorators could be dynamically constructued at
define time.

Anyway, it's this sort of reference-modifier that's at issue here,
whether or not the implementation is truly declarative.

Now that there's two, can there be more? Should there be?

It's not difficult for me to imagine at least two other things I'd want
to do with references: 1) make them immutable (making life easier for
the compiler) 2) make them refer only to objects with certain
properties (strong duck-typing).

Also there's the question of typo-driven bugs, where an attempted
rebinding of "epsilon" instead cerated a reference called "epselon".
(The epselon bug) This is the bane of fortran, and after generations it
was generally agreed that optionally one could require all references
to be declared (implicit none). Perl went throgh a similar process and
implemented a "use strict" module. Experienced Pythonistas are oddly
resistant to even contemplating this change, though in the Fortran and
Perl worlds their usage quickly became practically universal.

I believe that enthusiasm for this construct in other languages is so
strong that it should be prominently addressed in Python introductions
and surveys, and that questions in this regard should be expected from
newbies and patiently addressed. I also don't fully understand the
profound aversion to this idea.

I myself am going back and forth on all this. I despise the fact that
good fortran90 code often has more declarations than executables. Ed
Ream (LEO's author) pointed out to me the Edward-Tufte-ness of Python.
No wasted ink (except maybe the colons, which I do sometimes find
myself forgetting on long edits...)  I don't want Python to look like
f90. What would be the point?

On the other hand, I think compiler writers are too attached to
cleverly divining the intention of the programmer. Much of the effort
of the compiler could be obviated by judicious use of declarations and
other hints in cases where they matter. Correct code could always be
generated without these hints, but code could be made more
runtime-efficient with them. People who are running codes that are a
compute-bound tend not to be beginners, and could put up with some
clutter when tuning their code.

In the end, I think the intuition of what's Pythonic is enormously
valuable, and I'm continuing to learn from discussions here every day.
As a result, I'm inclined to believe in the grounds of authority that
this sort of trick does not belong in Python.

That said it seems unlikely that any version of Python will ever be
competitive as a high-performance numerical computing language because
nothing can be known about bindings at compile time, as we are
constantly being remineded here. I'll be happy if Python knocks my
socks off yet again, but I can't see counting on it. So the successor
to Fortran (presuming it isn't C++, which I do presume) may be
influenced by Python, but probably it won't be Python.

mt



From antonyliu2002 at yahoo.com  Sat Feb 26 00:01:22 2005
From: antonyliu2002 at yahoo.com (Anthony Liu)
Date: Fri, 25 Feb 2005 21:01:22 -0800 (PST)
Subject: Which module is "set " in?
In-Reply-To: <xN-dnQs_WL5Tnb3fRVn-3g@comcast.com>
Message-ID: <20050226050122.28530.qmail@web54504.mail.yahoo.com>

Thanks a lot, mine is Python 2.3, and 

    from sets import Set as set

works great!


--- Steven Bethard <steven.bethard at gmail.com> wrote:

> Anthony Liu wrote:
> > I want to use the set function like
> > 
> >     mylist = ['a', 'b', 'b', 'd', 'e', 'a']
> >     myset  = set (mylist)
> > 
> > But I don't know what to import, I tried sys,
> sets,
> > they don't work.
> 
> If you're using Python 2.4, they're builtin.  If
> you're using Python 
> 2.3, you'll probably want to do something like:
>      from sets import Set as set
> Python's before 2.3 do not have a set type.
> 
> > What's the easy way to find out the module that
> > contains a particular function?
> 
> Perhaps the documentation index?
> 
> http://docs.python.org/lib/genindex.html
> 
> Steve
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 



		
__________________________________ 
Do you Yahoo!? 
Yahoo! Mail - Find what you need with new enhanced search.
http://info.mail.yahoo.com/mail_250


From fortepianissimo at gmail.com  Fri Feb  4 02:11:11 2005
From: fortepianissimo at gmail.com (fortepianissimo)
Date: 3 Feb 2005 23:11:11 -0800
Subject: Computing class variable on demand?
In-Reply-To: <mY2dnU6Tjq1e-5_fRVn-hg@comcast.com>
References: <1107410898.260491.203090@l41g2000cwc.googlegroups.com>
	<6eydnSAjiuofW5zfRVn-sw@comcast.com>
	<1107445682.239962.284660@o13g2000cwo.googlegroups.com>
	<mY2dnU6Tjq1e-5_fRVn-hg@comcast.com>
Message-ID: <1107501071.325170.168620@z14g2000cwz.googlegroups.com>

Thank you so much about this useful tip! I learned the new decorator
feature of 2.4 simply because of your post.

Unfortunately I don't have luxury right now to run Python 2.4 (for what
I'm doing anyways). You mentioned the way to do decorator in 2.3. Still
I have a question here. Here is Scott David Daniels's code for lazy
initialization:

class Lazy (object):
    def __init__ (self, calculate_function):
        self._calculate = calculate_function

    def __get__ (self, obj, _=None):
        if obj is None:
            return self
        value = self._calculate(obj)
        setattr(obj, self._calculate.func_name, value)
        return value

The problem I run into using this for *instance* variables is: the
setattr() call won't work with a class with __slots__ defined - it
simply produces error that the attribute we want to modify is
read-only. Is there a workaround of this problem?

By the way this implementation is indeed better than the __getattr__
since in the latter I need to do a series of if... elif... else to
decide what to do with different attribute names. In the solution
above, I imagine the attribute names are hashed so it should have
better performance (the first time anyways).



From cam.ac.uk at mh391.invalid  Sun Feb 20 09:57:14 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sun, 20 Feb 2005 14:57:14 +0000
Subject: [ANN] Python 2.4 Quick Reference available
In-Reply-To: <mailman.2863.1108909421.22381.python-list@python.org>
References: <cv79sj$mgk$1@aphrodite.grec.isp.9tel.net>	<1108831318.290846.5930@z14g2000cwz.googlegroups.com>	<qnkll9kv09y.fsf@arbutus.physics.mcmaster.ca>	<37qaleF5gd7bcU1@individual.net>
	<421898CD.6040408@iinet.net.au>
	<mailman.2863.1108909421.22381.python-list@python.org>
Message-ID: <cva8gd$3v7$1@gemini.csx.cam.ac.uk>

Fran?ois Pinard wrote:
> [Nick Coghlan]
> 
> 
>>George Sakkis wrote:
>>
>>
>>>Still the word "open" sounds too general if the meaning is "open
>>>a file-like object"; OTOH this could be a good thing if in some
>>>future version "open('http://www.python.org')" was e.g. an alias to
>>>urllib2.urlopen.
> 
> 
>>Exactly the reason the BDFL gave for preferring 'open' - it may be extended 
>>to opening other types of objects than files.
> 
> 
> So, when we *know* we are opening a file, `file' cannot be a bad choice! :-)
> Moreover, practically, most of the times, we know we are opening a file.
> 
> `open' is opened (sic!) for some future magic.  I prefer to protect my
> programs against future magic, until this magic is precisely specified.

I agree. I don't want users to be able to specify URLs instead of
filenames unless I explicitly allow it.

To be honest I doubt open will be extended in this manner. I can see
the Pythoneers adding, say, a keyword argument to open to allow a URL
instead, but just changing the current behavior would be too risky. Plus,
what happens if I have a file named "http://www.python.org/"?
-- 
Michael Hoffman


From macrocosm at fastmail.fm  Thu Feb 17 17:32:45 2005
From: macrocosm at fastmail.fm (Arich Chanachai)
Date: Thu, 17 Feb 2005 17:32:45 -0500
Subject: [Fwd: Re: [Uuu-devel] languages] <-- Why Python
In-Reply-To: <1108678805.542584.171930@z14g2000cwz.googlegroups.com>
References: <mailman.2781.1108677768.22381.python-list@python.org>
	<1108678805.542584.171930@z14g2000cwz.googlegroups.com>
Message-ID: <42151B8D.90104@fastmail.fm>

pythonUser_07 wrote:

>Some quick thoughts.
>
>1- Python is not new relatively speaking.
>  
>
Quite true, good point.

>2)- Python is a natural language for learning basic scripting, but can
>carry you through to object oriented program.
>
>3)- Knowing python, instantly gets you access to jython.  I've found
>jython incredibly helpful in learning java.  Finally, jython seems to
>be the defacto test scripting language for java.
>
>Cheers.
>
>  
>
These last two points kind of diverge from the point, no?  What I mean 
is that we want to present the argument of why Python is the best choice 
as THE built-in programming language for the revolutionary uuu operating 
system.  Unless Java becomes built-in, the ability to transition from 
Python to Jython isn't pertinent info when talking about the uuu 
project.  The idea is to have an easily maintainable (hence readable) OS 
core of functionality built with Python and to support advanced yet 
clean and simple modules which can run on the OS with support from the 
ground-up. 

On the other hand, are you suggesting against Python in favor of Java?

- Arich


From VBoycheva at jea.net  Fri Feb  4 16:05:09 2005
From: VBoycheva at jea.net (Valentina Boycheva)
Date: Fri, 4 Feb 2005 16:05:09 -0500 
Subject: FW: executing VBScript from Python and vice versa
Message-ID: <51B182D9911B914EA2243227834E86C005CB075E@jeamail.jea.net>

Thanks for the reply. I already have "Learning Python" from Mark Lutz and
David Ascher, which covers 2.3 (I am in 2.4). However, it seems like heavy
artillery to me. What I want is, for instance, run a VBScript to get a
function output and feed it to the Python script that called it. The reason
is that because I feel more comfortable with VBScript and have written a
small library of useful utilities, I don't want it to become obsolete. In
the mean time I did more reading and found a couple of prospective
alternatives - popen and os.system(command). Still need to work out how to
use them...

-----Original Message-----
From: aurora [mailto:aurora00 at gmail.com] 
Sent: Friday, February 04, 2005 3:28 PM
To: python-list at python.org
Subject: Re: executing VBScript from Python and vice versa

Go to the bookstore and get a copy of Python Programming on Win32
by Mark Hammond, Andy Robinson today.

   http://www.oreilly.com/catalog/pythonwin32/

It has everything you need.

> Is there a way to make programs written in these two languages  
> communicate
> with each other? I am pretty sure that VBScript can access a Python  
> script
> because Python is COM compliant. On the other hand, Python might be able  
> to
> call a VBScript through WSH. Can somebody provide a simple example? I  
> have
> exactly 4 days of experience in Python (and fortunately, much more in  
> VB6)
>
> Thanks.
>




From peter at engcorp.com  Fri Feb 25 22:03:36 2005
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 25 Feb 2005 22:03:36 -0500
Subject: wxpython tutorials
In-Reply-To: <1109317677.324835.119510@g14g2000cwa.googlegroups.com>
References: <1109309093.384392.59230@l41g2000cwc.googlegroups.com>
	<1109317677.324835.119510@g14g2000cwa.googlegroups.com>
Message-ID: <YvKdnduv4dmVeoLfRVn-uQ@powergate.ca>

Harlin Seritt wrote:
> Tkinter is easier to learn. It is better documented IMO. Tkinter is
> just as functional as any other GUI toolkit for Python. Creating your
> own widget sets is usually a breeze. Tkinter is not ugly if done
> properly. Tkinter apps are ported easily. On and on :-)

In this forum, no such comment about wxPython from the Tkinter
crowd, nor about Tkinter from the wxPython crowd, is allowed to
stand long without the (friendly) competition pointing out that
they feel the same way about their own favorite.

In my case, I found wxPython easier to learn and ultimately
better documented (for my purposes).  I also found it
to be more functional (again, for my purposes) and have had
no difficulties with portability.  (Okay, I'll admit that at
this time I haven't actually attempted to run any of my
wxPython stuff on anything except Windows, thus the lack
of difficulties in that area. ;-) )

The best approach in this and similar areas of Python is to
try them both out.  It will take only an hour of your time,
and after perusing some sample code and trying to make a
Hello World program in each, you'll pretty quickly choose
the one that will likely turn out to be best for _you_.

-Peter


From aleaxit at yahoo.com  Mon Feb  7 15:10:08 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 7 Feb 2005 21:10:08 +0100
Subject: string issue
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
	<36QMd.103084$Jk5.36127@lakeread01>
	<cu0j92$kf7$2@solaris.cc.vt.edu>
	<mailman.1913.1107547130.22381.python-list@python.org>
	<1grl717.1o4ofg7arp8c2N%aleaxit@yahoo.com>
	<36plr5F551pg8U1@individual.net>
	<1grmr97.9o27yo1xzwzd7N%aleaxit@yahoo.com>
	<36pv1dF55bt9jU1@individual.net>
Message-ID: <1grmsu7.voqhco123pqaoN%aleaxit@yahoo.com>

Reinhold Birkenfeld <reinhold-birkenfeld-nospam at wolke7.net> wrote:

> Alex Martelli wrote:
> 
> > So, *WHAT ON EARTH* could possibly
> > make this weird 'x[:]' form preferable to 'x*1'?!  It's MUCH more
> > obvious that the second one returns an independent, separate object
> > initially equal to x
> 
> .>> x = 2
> .>> y = x*1
> .>> x is y
> True
> .>>
> 
> just-kidding-ly yours,

You're just snipping a crucial side-observation which I had put in
exactly to avert such irrelevant diversions:

> whenever it
> matters -- i.e., whenever x is mutable.

Immutable types are allowed to collapse any two equal but "distinct"
objects into one identity -- that's always the case, I acknowledged that
in my sentence which I just quoted and which you had failed to quote
again, and I don't see what's funny in this procedure and the time it's
wasting, for me and for every reader of this group, now and in the
future from archives.

I'm sure that by selectively quoting just some of your words and
artfully omitting others I could ``make" you say, not just slightly
imprecise things, but utter and total idiocies.  So?  What's the point
of this "kidding"?  Next time, why don't you just omit, for example, a
"not", when you quote me, so as to make it appear that I was saying
exactly the reverse of what I was obviously saying?


I guess it must be time for me to go away from this group again, if my
time on it is to me spent repeating over and over all sorts of asides
which people "just kidding" carefully avoid quoting from my posts,
apparently in order to make believe they caught me in anything less than
perfect accuracy.  Cheez -- I HAVE been guilty of less than perfect
accuracy in the past (even of outright errors), but not THIS time (if
one has the common decency to look at ALL the words I posted, rather
than a careful selection thereof), so I completely fail to see how you
thought this "kidding" could be fun.

OK, I'm off.  Have a nice life.


Alex


From PipedreamerGrey at yahoo.com  Tue Feb 15 11:23:37 2005
From: PipedreamerGrey at yahoo.com (PipedreamerGrey at yahoo.com)
Date: 15 Feb 2005 08:23:37 -0800
Subject: PythonCard and Py2Exe
In-Reply-To: <mailman.2620.1108476543.22381.python-list@python.org>
References: <1108476282.790371.155670@l41g2000cwc.googlegroups.com>
	<mailman.2620.1108476543.22381.python-list@python.org>
Message-ID: <1108484617.908022.280320@l41g2000cwc.googlegroups.com>

For this setup file, the executable packs, but when I attempt to run
the program, the screen flashes, " cannot import name radiogroup ".
I've attempted adding "import radiogroup", "from Pythoncard import
radiogroup" and  "from Pythoncard.compnents import radiogroup"  to the
setup file, and that doesn't help.  It simply terminates with no error.
 I've tried removing all references to radiogroup from the script's
resource file, but that defeats the purpose, as the list box is central
to the script's use.

My computer runs the script fine, so the radiogroup module must be
there.  I must just have the imports written wrong.



From dbeech at bigpond.net.au  Mon Feb  7 05:43:52 2005
From: dbeech at bigpond.net.au (Dave Beech)
Date: Mon, 7 Feb 2005 21:13:52 +1030
Subject: Python-list Digest, Vol 17, Issue 132
References: <20050207053123.846541E400F@bag.python.org>
Message-ID: <021001c50d01$ed29dfc0$0100000a@vic.bigpond.net.au>


----- Original Message -----
From: <python-list-request at python.org>
To: <python-list at python.org>
Sent: Monday, February 07, 2005 4:01 PM
Subject: Python-list Digest, Vol 17, Issue 132


> Send Python-list mailing list submissions to
> python-list at python.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://mail.python.org/mailman/listinfo/python-list
> or, via email, send a message with subject or body 'help' to
> python-list-request at python.org
>
> You can reach the person managing the list at
> python-list-owner at python.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Python-list digest..."
>


----------------------------------------------------------------------------
----


> Today's Topics:
>
>    1. Re: pygame.mixer.music not playing (Marian Aldenh?vel)
>    2. declarations summary (Michael Tobis)
>    3. Re: How to read POSTed data (Dan Perl)
>    4. Re: Converting a string to a function pointer (Tim Roberts)
>    5. Re: pygame.mixer.music not playing (Marian Aldenh?vel)
>    6. Re: Questions about mathematical signs... (Dan Bishop)
>    7. Re: WYSIWYG wxPython "IDE"....? (Simon John)
>    8. Re: pygame.mixer.music not playing (Marian Aldenh?vel)
>    9. Unable to run IDLE Under Windows (Jonathan Polley)
>   10. Memory Allocation? (Chris S.)
>   11. Re: pygame.mixer.music not playing (M.E.Farmer)
>   12. Re: pygame.mixer.music not playing (Marian Aldenh?vel)
>


----------------------------------------------------------------------------
----


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




From jgrahn-nntq at algonet.se  Tue Feb  1 15:14:38 2005
From: jgrahn-nntq at algonet.se (Jorgen Grahn)
Date: 1 Feb 2005 20:14:38 GMT
Subject: Python's idiom for function overloads
References: <mailman.1677.1107230965.22381.python-list@python.org>
Message-ID: <slrncvvoma.rr5.jgrahn-nntq@frailea.sa.invalid>

On Tue, 1 Feb 2005 04:17:10 +0000, Frans Englich <frans.englich at telia.com> wrote:
...
> But in Python, when one wants to be able to pass different data types into a 
> single "entry point" for functionality, how is that best done? To in a 
> function do an if statement with the type() function? 

Have a look at this older thread on this subject:

  Subject: Re: Does python support multi prototype.
  Message-ID: <TZydnS8D3rdVbY3cRVn-gA at powergate.ca>

/Jorgen

-- 
  // Jorgen Grahn <jgrahn@       Ph'nglui mglw'nafh Cthulhu
\X/                algonet.se>   R'lyeh wgah'nagl fhtagn!


From fredrik at pythonware.com  Sat Feb 12 12:24:11 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 12 Feb 2005 18:24:11 +0100
Subject: Newbie needs help with canvas.create_image !
References: <b5f9523.0502120915.1a93d23@posting.google.com>
Message-ID: <culdvd$46p$1@sea.gmane.org>

Antti Isomursu wrote:

> With code below I get a red box with given width and height. When I
> use that create_image, nothing happens. I only see that same red box.
> Why is that?
> The loop.bmp is working fine when I use show() method.
>
>        win = Toplevel()
>
>        canvas = Canvas(win, width=100, height=100, background='red')
>        canvas.pack()
>
>        im = Image.open("loop.bmp")
>        photo = ImageTk.PhotoImage(im)
>
>        canvas.create_image(8, 8, anchor="nw", image=photo)

the problem might be that the PhotoImage is garbage collected before being
displayed.  see the note on the bottom of this page for details:

    http://effbot.org/zone/tkinter-photoimage.htm

</F> 





From onurb at xiludom.gro  Tue Feb 15 08:26:21 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Tue, 15 Feb 2005 14:26:21 +0100
Subject: Variables.
In-Reply-To: <614c778e.0502150429.1a2a4d8d@posting.google.com>
References: <614c778e.0502150429.1a2a4d8d@posting.google.com>
Message-ID: <4211f87e$0$16331$636a15ce@news.free.fr>

administrata wrote:
> I wrote this, It's a bit lame though
> 
(snip code - see other answers in this thread)

> raw_input("\n\\t\t\t- The End -")

Why on earth are you using raw_input() here ?

> 
> HELP plz

No one can help you if you don't explain your problem. We are not 
psychic enough to read your mind !-)

(and please : avoid SCREAMING and l33t speak too...)

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for 
p in 'onurb at xiludom.gro'.split('@')])"


From Serge.Orlov at gmail.com  Sat Feb 12 03:16:53 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: Sat, 12 Feb 2005 11:16:53 +0300
Subject: sre is broken in SuSE 9.2
References: <mailman.2299.1108029731.22381.python-list@python.org>
	<1108060527.378911.146240@o13g2000cwo.googlegroups.com>
	<420D4D9A.40201@v.loewis.de>
Message-ID: <cuke1o$fo4$1@news.comcor-tv.ru>

"Martin v. L?wis" wrote:
> Serge Orlov wrote:
>  > To summarize the discussion: either it's a bug in glibc or there
> is an
>> option to specify modern POSIX locale. POSIX locale consist of
>> characters from the portable character set, unicode is certainly
>> portable.
>
> Yes, but U+00E4 is not in the portable character set. The portable
> character set is defined here:
>
> http://www.opengroup.org/onlinepubs/007908799/xbd/charset.html

Thanks for the link. They write (in 1997 or earlier ?):

 The wide-character value for each member of the Portable
Character Set will equal its value when used as the lone character
 in an integer character constant. Wide-character codes for other
characters are locale- and *implementation-dependent*

Emphasis is mine. So how many libc implementations with
non-unicode wide-character codes do we have in 2005?
I'm really interested to know.

  Serge.




From russblau at hotmail.com  Tue Feb  1 11:44:59 2005
From: russblau at hotmail.com (Russell Blau)
Date: Tue, 1 Feb 2005 11:44:59 -0500
Subject: pythonic equivalent of Mathematica's FixedPoint function
References: <1107273234.276714.272890@z14g2000cwz.googlegroups.com>
	<1107273715.614766.32810@f14g2000cwb.googlegroups.com>
Message-ID: <ctoblb$ren$1@sea.gmane.org>

"jelle" <jelleferinga at gmail.com> wrote in message
news:1107273715.614766.32810 at f14g2000cwb.googlegroups.com...
> doh...
>
> https://sourceforge.net/projects/fixedpoint
>
> pardon me
>

I don't think that Tim's FixedPoint class is doing the same thing as
Mathematica's FixedPoint function (or even anything remotely similar).
Well, except for the fact that they both operate on numbers....

You could probably write your own FixedPoint function without too much
difficulty, with the only tricky part being for it to know when to stop!

Russ

-- 
I don't actually read my hotmail account, but you can replace hotmail with
excite if you really want to reach me.





From elbertlev at hotmail.com  Thu Feb 17 23:47:59 2005
From: elbertlev at hotmail.com (elbertlev at hotmail.com)
Date: 17 Feb 2005 20:47:59 -0800
Subject: namespace collisions
In-Reply-To: <mailman.2776.1108674138.22381.python-list@python.org>
References: <4214e074$0$32617$db0fefd9@news.zen.co.uk>
	<mailman.2776.1108674138.22381.python-list@python.org>
Message-ID: <1108702078.999671.20910@f14g2000cwb.googlegroups.com>


John Lenton wrote:
> On Thu, Feb 17, 2005 at 06:20:36PM +0000, Will McGugan wrote:
> > Hi,
> >
> > I'm accumulating a number of small functions, which I have sensibly
put
> > in a single file called 'util.py'. But it occurs to me that with
such a
> > generic name it could cause problems with other modules not written
by
> > myself. Whats the best way of handling this? If I put it in a
common
> > location in my Python path, should I call it willsutil.py?
>
>    local.util
>
> is probably a convention worth starting :)
>
> or you could go with
>
>    WilMcGugan.util
>
> but ThatGetsOldFast.
>
>
> --
> John Lenton (john at grulic.org.ar) -- Random fortune:
> All my friends are getting married,
> Yes, they're all growing old,
> They're all staying home on the weekend,
> They're all doing what they're told.

I call modules like x_utils.py, where prefix x is assigned to a
particular pakage. In this case import statements look like:

import Company.repotrtools.e_excel as e_excel

or

from Company.repotrtools.e_excel import e_writer, e_reader

generally this are classes, not functions.

Newer had namespace collisions (yet :)



From jack at performancedrivers.com  Mon Feb 28 16:06:14 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Mon, 28 Feb 2005 16:06:14 -0500
Subject: naming convention for scalars, lists, dictionaries ...
In-Reply-To: <just-F282AF.21413728022005@news1.news.xs4all.nl>
References: <1109613115.760962.292360@z14g2000cwz.googlegroups.com>
	<3YydnR3xNd4k_r7fRVn-3g@comcast.com>
	<20050228190504.GV9263@performancedrivers.com>
	<422386ED.60007@benjiyork.com>
	<mailman.3152.1109622405.22381.python-list@python.org>
	<just-F282AF.21413728022005@news1.news.xs4all.nl>
Message-ID: <20050228210614.GX9263@performancedrivers.com>

On Mon, Feb 28, 2005 at 09:41:37PM +0100, Just wrote:
> In article <mailman.3152.1109622405.22381.python-list at python.org>,
>  Jack Diederich <jack at performancedrivers.com> wrote:
> 
> > On Mon, Feb 28, 2005 at 04:02:37PM -0500, Benji York wrote:
> > > Jack Diederich wrote:
> > > >Ditto for me, plural implies list and singular implies instance, 
> > > >for (contact) in contacts:
> > > >   # do something with contact
> > > 
> > > May I ask why you place the parenthesis in the for statement?
> > 
> > I like the tuple-ness feel of it and frequently unpack multiple
> > values in for loops.  I also like the visual feel, it makes it
> > easy to see what is being unpacked and what is the source.
> > 
> > "for (one, two, three) in somelist:"
> > versus
> > "for one, two, three in sometlist:"
> > 
> > Even with a colorizing editor (emacs) I find the first version
> > easier to read.  YMMV.
> 
> But you're using it for _single_ values. That's like writing
> 
>       (val) = someFunction(...)

Your Milage May^H^H^HDoes Vary *wink*
A quick grep of my source shows zero unparenthesized for loops,
266 with multiple unpacks and 492 iterating over single values.
Actually a bit closer to even, 96 are 'for (i) in range(len(l)):'
that were written before enumerate() came about.

I just always use parenthesis in for loops and when creating/upacking
tuples.  I find it easier to read, except in the '(var) = func()' case.
Other people never use them. *shrug* I find this impossible to get
worked up about.  What other people do in the privacy of their own
codebase doesn't bother me one bit.

My $0.01 bits,

-Jack


From jerf at jerf.org  Tue Feb  1 18:06:38 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 01 Feb 2005 18:06:38 -0500
Subject: how about writing some gui to a known console application
References: <1107294520.224155.131640@f14g2000cwb.googlegroups.com>
	<41fffb59$0$21637$a1866201@visi.com>
Message-ID: <pan.2005.02.01.23.06.38.622308@jerf.org>

On Tue, 01 Feb 2005 21:57:45 +0000, Grant Edwards wrote:

> On 2005-02-01, alexrait1 <alexrait at gmail.com> wrote:
> 
>> Do something useful... (at least for me) For instance I need a gtk
>> frontend for pgp. So here you can have an opportunity to learn both
>> pyGTK and pgp. A lot of python code... :)
> 
> Um, to whom are you addressing your commands?

Presumably the "Suggesion[sic] for an undergrad final year project in
Python" thread.



From mefjr75 at hotmail.com  Fri Feb  4 00:05:16 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 3 Feb 2005 21:05:16 -0800
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
	<7xy8e5jagh.fsf@ruckus.brouhaha.com>
Message-ID: <1107490052.542546.285950@c13g2000cwb.googlegroups.com>

Paul Rubin wrote:
> Yes, good point about html tables, though I'm concerned primarily
> about server response.  (It's off-topic, but how do you use CSS to
get
> the effect of tables?)
To emulate a table you use the div and span tag.
(really you can do just about anything with div and span)
Div is a block level tag and span isn't.
You can also group them  together and nest them.
div and span have little meaning but the can be styled.
In the CSS declaration we create styles and then just use them later as
needed.
Try to always focus on layout first and actual style later. (CSS is all
about seperation of concerns)
You will find the verbosity of CSS is not as annoying as you might
think it might be, it is quite easy to learn and well worth the effort.
Ok here is a bad example ( do a search on Google for CSS tables ).
( this was torn out of a webapp I am working on )
.<div class='panel'>
.  <div class="archivehead"><strong>
.    <span class="leftspace">Archive</span>
.    <span class="rightspace">Entry Date</span>
.    </strong>
.  </div>
.      <div class="archivelite">
.        <span class="bold">%s</span><span>
.        <strong>%s</strong>
.        </span><span class="right">%s</span>
.      </div>
.      <div class="archivedark">
.        &nbsp &nbsp &nbsp &nbsp posted by: %s
.        <span class="right">
.        <strong>text </strong>
.        <strong> %s</strong>
.        </span>
.      </div>
.</div>
And here is some of the CSS
( these are classes the dot in front of the name tells you that, when
combined with div or span just about anything is possible. )
.  .panel {
.        border: solid thin #666677;
.        margin: 2em 4em 2em 4em;}
.  .leftspaces {
.        letter-spacing:.5em;
.        text-decoration:none;
.        color:#EEEEff;}
.  .rightspaces {
.        letter-spacing:.5em;
.        position: absolute;
.        right: 5em;
.        text-decoration: none;
.        color:#EEEEff;}
.
.  .archivehead {
.         text-indent:.5em;
.         background-color:#333333;}
.  .archivelite {
.         color:#777777;
.         text-indent:.5em;
.         background-color:#222222;}
.  .archivedark {
.         color:#777777; text-indent:.5em;
.         background-color:#111111;}
.  .archivelite a{
.         color:#BBBBDD;
.         text-decortation:none;
.         background-color:#222222;}
.  .archivedark a{
.         color:#BBBBDD;
.         text-decortation:none;
.         background-color:#111111;}
hth,
M.E.Farmer



From tjreedy at udel.edu  Fri Feb  4 16:52:30 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 4 Feb 2005 16:52:30 -0500
Subject: string issue
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
	<36QMd.103084$Jk5.36127@lakeread01>
Message-ID: <cu0qpb$4g2$1@sea.gmane.org>


"Steve Holden" <steve at holdenweb.com> wrote in message 
news:36QMd.103084$Jk5.36127 at lakeread01...
> You are modifying the list as you iterate over it. Instead, iterate over 
>  > a copy by using:
> for ip in ips[:]:

Or if you are only deleting items, you can iterate backwards.

You can also build a new list with only the items you want.  Do this either 
with an explicit loop or even better, use filter or a list comp.

ips = ['255.255.255.255', '128.173.120.79', '198.82.247.98',
'127.0.0.1', '255.0.0.0', '255', '128.173.255.34']

# 2.2 requires single char for 'not in string' test

ips2 = []
for ip in ips:
  if ip.find('255') == -1: ips2.append(ip)

print ips2
print filter(lambda ip: ip.find('255') == -1, ips)
print [ip for ip in ips if ip.find('255') == -1]

# thrice prints
['128.173.120.79', '198.82.247.98', '127.0.0.1']

This seems much more sensible to me than building a new list with 
everything (a copy), including things you don't want, and then deleting the 
things you don't want (an O(n**2) operation).

Terry J. Reedy





From petite.abeille at gmail.com  Sun Feb 13 05:54:54 2005
From: petite.abeille at gmail.com (PA)
Date: Sun, 13 Feb 2005 11:54:54 +0100
Subject: [VERDICT] - V01: The Lazaridis Failure - No One Can Help!
In-Reply-To: <cunb1r$hns$05$1@news.t-online.com>
References: <ctsjmg$75p$1@usenet.otenet.gr> <cukut2$94s$1@usenet.otenet.gr>
	<s%uPd.107074$Jk5.8822@lakeread01>
	<cunb1r$hns$05$1@news.t-online.com>
Message-ID: <f072816b69206bbeaa3311517e844dce@gmail.com>


On Feb 13, 2005, at 11:44, Diez B. Roggisch wrote:

>> If this is "goodbye" I can't say I'm sorry.
>
> Don't feed the trolls - as tempting as it is....

8^)

Cheers

--
PA, Onnay Equitursay
http://alt.textdrive.com/




From peter at engcorp.com  Tue Feb 15 17:09:27 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 15 Feb 2005 17:09:27 -0500
Subject: Can __new__ prevent __init__ from being called?
In-Reply-To: <87is4tldea.fsf@news2.ososo.de>
References: <87is4tldea.fsf@news2.ososo.de>
Message-ID: <R9idnQT4h4wN7o_fRVn-3w@powergate.ca>

Felix Wiemann wrote:
> Sometimes (but not always) the __new__ method of one of my classes
> returns an *existing* instance of the class.  However, when it does
> that, the __init__ method of the existing instance is called
> nonetheless, so that the instance is initialized a second time.  For
> example, please consider the following class (a singleton in this case):
> 
[snip]
> How can I prevent __init__ from being called on the already-initialized
> object?

Is this an acceptable kludge?

 >>> class C(object):
...  instance=None
...  def __new__(cls):
...   if C.instance is None:
...    print 'creating'
...    C.instance = object.__new__(cls)
...   else:
...    cls.__init__ = lambda self: None
...   return cls.instance
...  def __init__(self):
...   print 'in init'
...
 >>> a = C()
creating
in init
 >>> b = C()
 >>>

(Translation: dynamically override now-useless __init__ method.
But if that works, why do you need __init__ in the first place?)

-Peter


From dalius.dobravolskas at gmail.com  Thu Feb 10 15:16:27 2005
From: dalius.dobravolskas at gmail.com (Dalius Dobravolskas)
Date: Thu, 10 Feb 2005 20:16:27 +0000
Subject: Python v.s. c++
In-Reply-To: <a31065ef05021010117839eb05@mail.gmail.com>
References: <a31065ef05021010117839eb05@mail.gmail.com>
Message-ID: <98dd087e050210121665306fc6@mail.gmail.com>

Hello
> Hi,  if i am already skillful with c++.  Is it useful to learn python? thanks!
Very useful :)

Dalius


From pit.grinja at gmx.de  Fri Feb  4 11:55:43 2005
From: pit.grinja at gmx.de (Piet)
Date: 4 Feb 2005 08:55:43 -0800
Subject: Learning Python for a new beginner
References: <1107504846.923502.185700@c13g2000cwb.googlegroups.com>
Message-ID: <39cbe663.0502040855.c983143@posting.google.com>

Hi Lisa,
> I hear that Python is one of the easiest languages to learn. It is
> easier than PHP or Pearl?
Most people think so, though personal experiences can vary. I played
around wit hPerl for some time but never got really far. Python, on
the other hand, attracted me from the first minute.
Don?t be fooled: Learning and mastering Python requires work and
brains, but that is the price you have to pay anyways. It helps you to
develop at your personal pace from beginner to advanced, and it does
so without throwing completely new constructs in your brain every day.
It comes bundled with some built-in tools for writing, editing and
running programs, good and user-friendly documentation (which appears
to be better organized than Perl?s doc), and a lot of built-in
functions to handle data structures and files in an easily tractable,
easily remembered way. By learning Python, you will also learn some
advanced concepts (if you want) that could help you to understand the
basics of more advanced languages like C++ and Java. Combine that with
fine community support and a lot of free third-party modules (you
won?t need all of them on your first day, but it is nice to know that
they are out there), and I would say that you have all you need in the
best way you can get to start your programming career.


BW
Piet


From fuzzyman at gmail.com  Tue Feb 22 09:07:04 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 22 Feb 2005 06:07:04 -0800
Subject: Problem with the sort() function
In-Reply-To: <iRz*tMSHq@news.chiark.greenend.org.uk>
References: <64827323f7134aea810788b3ec6cf516@localhost.talkaboutprogramming.com>
	<mailman.2928.1109066131.22381.python-list@python.org>
	<7204a5f80386fadd1afa4bc2509be849@localhost.talkaboutprogramming.com>
	<iRz*tMSHq@news.chiark.greenend.org.uk>
Message-ID: <1109081224.749636.263730@g14g2000cwa.googlegroups.com>


Sion Arrowsmith wrote:
> clementine <kashmira_v_phalak at yahoo.com> wrote:
> >Thanx Nick...I forgot to mention im using python 2.2 and along with
a host
> >of other things it doesnt seem to have the enumarate built in
function
> >:(:(:(...is it possible to replace it by something else? I dont
think
> >simulating it will be feasible....
>
> Here's one I prepared earlier:
>
> if sys.version_info < (2,3):
>     def enumerate(l):
>         return zip(range(len(l)), l)
>
> which will suck somewhat on large lists compared to being able to
> do it with iterators.
>

Iterators are available in python 2.2
class enumerate:
    def __init__(self, inlist):
        self.inlist = inlist
        self.index = 0

    def next(self):
        if self.index >= len(self.inlist): raise StopIteration
        thisone = self.inlist[self.index]
        self.index += 1
        return self.index-1, thisone

    def __iter__(self):
        return self

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml

> --
> \S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
>   ___  |  "Frankly I have no feelings towards penguins one way or the
other"
>   \X/  |    -- Arthur C. Clarke
>    her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump
bump bump



From fredrik at pythonware.com  Mon Feb 21 05:48:38 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 21 Feb 2005 11:48:38 +0100
Subject: Don't understand global variables between modules
References: <4219ba1f$0$162$e4fe514c@dreader14.news.xs4all.nl>
Message-ID: <cvce33$r60$1@sea.gmane.org>

Bart wrote:

> I don't understand globals between multiple modules in a python program. I
> really don't. I've narrowed it down to the following two very simple
> programs a.py and b.py. When I run a.py I get the following output:
>
> inc:  2
> A:  2
> inc:  3
> B:  3
> C:  1
>
> I don't understand the last line at all. Why is my x variable 1 after having
> been incremented twice?

because running a script isn't the same thing as importing it.  try adding
"print __name__" lines before your other print statements so you can see
who's printing what.

> Is there more than one global space?

in this case, there are more module namespaces than you think.

this page might help (especially the "Using Modules as Scripts" section):

    http://effbot.org/zone/import-confusion.htm

</F> 





From hancock at anansispaceworks.com  Sat Feb 19 01:05:49 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Sat, 19 Feb 2005 00:05:49 -0600
Subject: Test for structure
In-Reply-To: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
References: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
Message-ID: <200502190005.49230.hancock@anansispaceworks.com>

On Wednesday 16 February 2005 09:08 am, alex wrote:
> how can I check if a variable is a structure (i.e. a list)? For my
> special problem the variable is either a character string OR a list of
> character strings line ['word1', 'word2',...]
> 
> So how can I test if a variable 'a' is either a single character string
> or a list?

The literally correct but actually wrong answer is:

if type(a) == type([]):
    print "'a' is a duck"

But you probably shouldn't do that. You should probably just test to
see if the object is iterable --- does it have an __iter__ method?

Which might look like this:

if hasattr(a, '__iter__'):
    print "'a' quacks like a duck"

That way your function will also work if a happens to be a tuple,
a dictionary, or a user-defined class instance which is happens to
be  iterable.

Being "iterable" means that code like:

for i in a:
   print "i=%s is an element of a" % repr(i)

works.  Which is probably why you wanted to know, right?

Cheers,
Terry

-- 
--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From fredrik at pythonware.com  Mon Feb 14 14:10:14 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 20:10:14 +0100
Subject: Recursive __cmp__ in different Python versions
References: <Pine.LNX.4.62.0502142123060.7861@rnd.onego.ru>
Message-ID: <cuqstl$vl0$1@sea.gmane.org>

Roman Suzi wrote:

> #The following Python code:
>
> /.../
>
> # gives interesting results under different Python version.
> The most common sense in the result in Python 2.4: recursion
> limit reached.
>
> Python 2.3 tries 20+ times and then give up.
>
> Python1.5 gives segmentation fault...

is there a question in here, or is it just an observation?

if you want some background, search for "recursive" and "cmp" in Misc/NEWS
and Misc/HISTORY, and check the discussion here:

    http://mail.python.org/pipermail/python-dev/2003-October/039445.html

</F> 





From mwm at mired.org  Fri Feb 18 17:15:15 2005
From: mwm at mired.org (Mike Meyer)
Date: Fri, 18 Feb 2005 16:15:15 -0600
Subject: [Fwd: Re: [Uuu-devel] languages] <-- Why Python
References: <mailman.2781.1108677768.22381.python-list@python.org>
	<1108678805.542584.171930@z14g2000cwz.googlegroups.com>
	<mailman.2783.1108679758.22381.python-list@python.org>
	<864qgaisoq.fsf@guru.mired.org>
	<mailman.2785.1108689484.22381.python-list@python.org>
	<86vf8qhcql.fsf@guru.mired.org>
	<mailman.2787.1108691319.22381.python-list@python.org>
Message-ID: <86r7jdh5vw.fsf@guru.mired.org>

Arich Chanachai <macrocosm at fastmail.fm> writes:

> Mike Meyer wrote:
>>Whatever the intentions may be, the *act* is one of dictation. Since
>>the point of the underlying OS is to increase the interconnections
>>between applications (assuming I've found the correct web page and
>>interpreted it correctly), the underlying architecture should be
>>language-neutral. That allows as many applications as possible to play
>>in the environment.
>>
> When the CLR is integrated, it will allow a wide array of problem
> solving choices for uuu users.

You've missed the point. Allowing a wide array of problem solving
choices is a goal, not a means. Instead of concentrating on adding
langauges, you should be provding an infrastructure that makes adding
langauges simple.  The Plan 9 example does this best, as any language
that can do file I/O is supported.

It may be that CLR is just such an infrastructure (I'm not familiar
with it). In that case, instead of pushing Python, you should be
pushing CLR with IronPython as an option.

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From walter at livinglogic.de  Wed Feb  9 12:11:02 2005
From: walter at livinglogic.de (=?ISO-8859-1?Q?Walter_D=F6rwald?=)
Date: Wed, 09 Feb 2005 18:11:02 +0100
Subject: Trouble with the encoding of os.getcwd() in Korean Windows
In-Reply-To: <1107958914.583017.79190@l41g2000cwc.googlegroups.com>
References: <1107953764.478501.176650@c13g2000cwb.googlegroups.com>	<cud2nj$det$1@news6.zwoll1.ov.home.nl>	<1107956992.350460.12720@f14g2000cwb.googlegroups.com>
	<1107958914.583017.79190@l41g2000cwc.googlegroups.com>
Message-ID: <420A4426.8010000@livinglogic.de>

Erik Bethke wrote:
> Hello All,
> 
> sorry for all the posts... I am *almost* there now...
> 
> okay I have this code:
> 
> import sys, os
> 
>       encoding = locale.getpreferredencoding()
>       htmlpath = os.getcwd()
>       htmlpath = htmlpath.decode( encoding )

You might want to try os.getcwdu() instead of this. According to
http://www.python.org/doc/2.4/lib/os-file-dir.html
this has been added in Python 2.3 and should work on Windows.

Bye,
    Walter D?rwald


From guettli at thomas-guettler.de  Wed Feb 16 08:53:22 2005
From: guettli at thomas-guettler.de (Thomas Guettler)
Date: Wed, 16 Feb 2005 14:53:22 +0100
Subject: supress creation of .pyc files
Message-ID: <pan.2005.02.16.13.53.22.459631@thomas-guettler.de>

Hi,

Is there a way to import a file without creating
a .pyc file?

Of course you can delete the pyc in my script after
the import statement, but maybe there is a switch
that I have not found yet.

The imported file is a config file, not a script.

Thomas


-- 
Thomas G?ttler, http://www.thomas-guettler.de/




From bpeng at rice.edu  Tue Feb 15 15:43:25 2005
From: bpeng at rice.edu (Bo Peng)
Date: Tue, 15 Feb 2005 14:43:25 -0600
Subject: Big latex subscript using python.sty and manual.cls
Message-ID: <cutmte$58h$1@joe.rice.edu>

Dear list,

I am writing a manual for my python extension using Python (2.4) latex 
classes. Everything seems to be fine except that the subscripts are as 
big as normal text ( see page 55 of 
http://bp6.stat.rice.edu:8080/simuPOP_doc/userGuide.pdf ). I doubt that 
the following piece of code in python.sty is causing the problem but can 
not fix it. (I get errors when commenting out this block of code.) Does 
anyone know what is happening here?

Note that the subscripts are OK if I use other classes like report.cls.

Many thanks in advance.

Bo

%%%%% in python.sty %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% This gets the underscores closer to the right width; the only change
% from standard LaTeX is the width specified.

\DeclareTextCommandDefault{\textunderscore}{%
   \leavevmode \kern.06em\vbox{\hrule\@width.55em}}

% Underscore hack (only act like subscript operator if in math mode)
%
% The following is due to Mark Wooding (the old version didn't work with
% Latex 2e.

\DeclareRobustCommand\hackscore{%
   \ifmmode_\else\textunderscore\fi%
}
\begingroup
\catcode`\_\active
\def\next{%
   \AtBeginDocument{\catcode`\_\active\def_{\hackscore{}}}%
}
\expandafter\endgroup\next
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


From nessus at mit.edu  Wed Feb 23 22:54:50 2005
From: nessus at mit.edu (Douglas Alan)
Date: Wed, 23 Feb 2005 22:54:50 -0500
Subject: Canonical way of dealing with null-separated lines?
Message-ID: <lcll9efw8l.fsf@gaffa.mit.edu>

Is there a canonical way of iterating over the lines of a file that
are null-separated rather than newline-separated?  Sure, I can
implement my own iterator using read() and split(), etc., but
considering that using "find -print0" is so common, it seems like
there should be a more cannonical way.

|>oug


From cam.ac.uk at mh391.invalid  Tue Feb  8 11:29:51 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Tue, 08 Feb 2005 16:29:51 +0000
Subject: iterators instead of callbacks.
In-Reply-To: <slrnd0hfj4.26q.apardon@rcpc42.vub.ac.be>
References: <slrnd0hfj4.26q.apardon@rcpc42.vub.ac.be>
Message-ID: <cuape4$172$3@gemini.csx.cam.ac.uk>

Antoon Pardon wrote:

> I'm thinking about the FTP-lib now where iterator equivallents of
 > retrbinary and retrlines methods may be more easily usable then the
 > current versions with a callback.
> 
> So I was wondering, are such transformations in the pipeline
> somewhere?

Maybe that should be a Python 3.0 idea. I'm sure it would happen a lot sooner
if you submitted a patch implementing the behavior you want.
-- 
Michael Hoffman


From aahz at pythoncraft.com  Sun Feb 13 21:01:11 2005
From: aahz at pythoncraft.com (Aahz)
Date: 13 Feb 2005 21:01:11 -0500
Subject: Kill GIL
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<86sm405d38.fsf@guru.mired.org> <cuospv$lfn$1@panix2.panix.com>
	<mailman.2502.1108343142.22381.python-list@python.org>
Message-ID: <cup0p7$c9s$1@panix2.panix.com>

In article <mailman.2502.1108343142.22381.python-list at python.org>,
Frans Englich  <frans.englich at telia.com> wrote:
>
>Personally I need a solution which touches this discussion. I need to run 
>multiple processes, which I communicate with via stdin/out, simultaneously, 
>and my plan was to do this with threads. Any favorite document pointers, 
>common traps, or something else which could be good to know?

Threads and forks tend to be problematic.  This is one case I'd recommend
against threads.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From jfj at freemail.gr  Sun Feb  6 23:22:07 2005
From: jfj at freemail.gr (jfj)
Date: Sun, 06 Feb 2005 20:22:07 -0800
Subject: Confused with methods
In-Reply-To: <1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>
Message-ID: <4206ECEF.30405@freemail.gr>

Alex Martelli wrote:

> jfj <jfj at freemail.gr> wrote:
> 
>>Isn't that inconsistent?
> 
> 
> That Python has many callable types, not all of which are descriptors?
> I don't see any inconsistency there.  Sure, a more generalized currying
> (argument-prebinding) capability would be more powerful, but not more
> consistent (there's a PEP about that, I believe).
> 

Thanks for the explanation.

The inconsistency I see is that if I wanted this kind of behavior
I would've used the staticmethod() builtin (which in a few words
alters __get__ to return the function unmodified).

So I would write

  A.foo = staticmethod (b.foo)

But now, it always acts as staticmethod:(

Anyway, if there's a PEP about it, I'm +1 because its "pythonic".


G.



From LionKimbro at gmail.com  Fri Feb 18 17:53:36 2005
From: LionKimbro at gmail.com (Lion Kimbro)
Date: 18 Feb 2005 14:53:36 -0800
Subject: Unit Testing in Python
References: <1108087841.271630.228970@o13g2000cwo.googlegroups.com>
Message-ID: <1108767215.985266.143310@g14g2000cwa.googlegroups.com>

No-nonsense PyUnit skeleton: http://www.python.org/moin/PyUnit

Copy & Paste.

Though there's a new module,
[http://codespeak.net/py/current/doc/test.html py.test,] that's easier
in many ways.



From sjmachin at lexicon.net  Sun Feb 20 07:29:58 2005
From: sjmachin at lexicon.net (John Machin)
Date: Sun, 20 Feb 2005 23:29:58 +1100
Subject: exercise: partition a list by equivalence
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<1108814276.680736.264380@l41g2000cwc.googlegroups.com>
	<37pb5jF5fnfivU1@individual.net>
	<1108890925.941814.45860@g14g2000cwa.googlegroups.com>
	<1108895373.013257.192310@l41g2000cwc.googlegroups.com>
	<1108899093.340446.216420@o13g2000cwo.googlegroups.com>
Message-ID: <si0h119jvlg2d3lkpg8s0r1h6o5c355cf9@4ax.com>

On 20 Feb 2005 03:31:33 -0800, bearophileHUGS at lycos.com wrote:

>John Machin:

>>FWIW, my offering is attached. <
>
>I'm sorry, I don't see the attach... (just the different title).
>

Here it is. I'll reply to the rest tomorrow. It's way past sleep-time
here.

!
!class _Stopper:
!    pass
!
!def merge_JM(pairings):
!    parent = {} 
!    link = {} 
!    size = {}
!    # 1. x not in parent => x is unknown
!    # 2. parent[x] -> root of cluster containing x
!    # 3. As a consequence of (2), parent[root] is root
!    # 4. link[x] chains the members of the cluster; 1st is root, 2nd
is link[root], ...
!    # 5. link[last_member] is _stopper
!    # 6. size[root] is the number of members of the cluster
!    parentget = parent.get
!    _stopper = _Stopper()
!    for inxa, inxb in pairings:
!        roota = parentget(inxa, _stopper)
!        rootb = parentget(inxb, _stopper)
!        if roota is not _stopper:
!            if rootb is not _stopper:
!                if roota is rootb:
!                    continue
!                if size[rootb] > size[roota]:
!                    newroot = rootb
!                    joiner = roota
!                else:
!                    newroot = roota
!                    joiner = rootb
!                size[newroot] += size[joiner]
!                del size[joiner]
!                parent[joiner] = newroot
!                tail = joiner
!                while link[tail] is not _stopper:
!                    tail = link[tail]
!                    parent[tail] = newroot
!                link[tail] = link[newroot]
!                link[newroot] = joiner
!            else:
!                size[roota] += 1
!                parent[inxb] = roota
!                link[inxb] = link[roota]
!                link[roota] = inxb
!        else:
!            if rootb is not _stopper:
!                size[rootb] += 1
!                parent[inxa] = rootb
!                link[inxa] = link[rootb]
!                link[rootb] = inxa
!            elif inxa is inxb:
!                parent[inxa] = inxa
!                link[inxa] = _stopper
!                size[inxa] = 1
!            else:
!                parent[inxa] = inxa
!                parent[inxb] = inxa
!                link[inxa] = inxb
!                link[inxb] = _stopper
!                size[inxa] = 2
!    olist = []
!    for root in size.iterkeys():
!        family = [root]
!        cousin = link[root]
!        while cousin is not _stopper:
!            family.append(cousin)
!            cousin = link[cousin]
!        olist.append(family)
!    return olist
!


From titus at caltech.edu  Tue Feb 22 19:16:57 2005
From: titus at caltech.edu (C. Titus Brown)
Date: Tue, 22 Feb 2005 16:16:57 -0800
Subject: HTMLgen maintenance.
Message-ID: <cvgi1q$nun$1@naig.caltech.edu>

Hi all,

I spent a little bit of time today working on Robin Friedrich's 
HTMLgen[0], and made it work more like a modern Python package, with a 
Python package directory & distutils-based setup.py.  I wanted to pass 
these things on to Robin, but his e-mail address @pythonpros doesn't 
work any more.  Any ideas of whom to contact, or is this abandonware?

I noticed an 'htmlgen' project on sourceforge, with 0% activity; it was 
created in August 2004 by Morten Kjeldgaard.

Anyhoo, if anyone wants my simple mods (10 lines total...) e-mail me.
The code is from 2.2.2, the latest from starship.python.net.

--titus

[0] http://starship.python.net/lib.html, and
	http://www.linuxjournal.com/article/2986


From motokoit at tiscali.it  Sun Feb  6 19:08:57 2005
From: motokoit at tiscali.it (motokoit)
Date: Mon, 7 Feb 2005 01:08:57 +0100
Subject: python under java2
Message-ID: <4206b2a0$0$6301$5fc30a8@news.tiscali.it>

For some reason i need to start a python script from inside a java code. The
main part of the code is something like this

try{
   Runtime rt = Runtime.getRuntime();
   System.out.println("start");
   Process proc =  Runtime.getRuntime().exec("python myscript.py");
   proc.waitFor();
   System.out.println("end");
} catch (Exception e){
   e.printStackTrace();
}

and so worked for months....but since some days ago the same instruction
does not work but execute without any exception, that is print either
"start" and "end"; the strangest thing happen when I call just

Process proc =  Runtime.getRuntime().exec("python myscript.py");

the execution looks like stalled and does not comes to an end printing just
the "start".

Some suggestion?
My machine is a Linux Mandrake64 10.1






From aurora00 at gmail.com  Wed Feb  2 19:28:01 2005
From: aurora00 at gmail.com (aurora)
Date: Wed, 02 Feb 2005 16:28:01 -0800
Subject: Printing Filenames with non-Ascii-Characters
References: <36a3ikF4uk8r0U1@individual.net> <opslja1wpv6yt6e7@news.cisco.com>
	<36bjrgF4s9bg8U1@individual.net>
Message-ID: <opsllh8zdm6yt6e7@news.cisco.com>

>  > print d.encode('cp437')
>
> So I would have to specify the encoding on every call to print? I am  
> sure to
> forget and I don't like the program dying, in my case garbled output  
> would be
> much more acceptable.

Marian I'm with you. You never known you have put enough encode in all the  
right places and there is no static type checking to help you. So that  
short answer is to set a different default in sitecustomize.py. I'm trying  
to writeup something about unicode in Python, once I understand what's  
going on inside...


From steve at holdenweb.com  Thu Feb 24 15:08:22 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 24 Feb 2005 14:08:22 -0600
Subject: Trouble with mysql-python 1.2.0 on Solaris 8 sparc
In-Reply-To: <6.1.2.0.0.20050224135003.0237bda0@mail.comcast.net>
References: <1108755202.574729.293610@g14g2000cwa.googlegroups.com>
	<1108925639.345790.230510@c13g2000cwb.googlegroups.com>
	<1109255132.541839.207530@o13g2000cwo.googlegroups.com>
	<421E1BA1.2030703@holdenweb.com>
	<6.1.2.0.0.20050224135003.0237bda0@mail.comcast.net>
Message-ID: <421E3436.7000505@holdenweb.com>

Alec Wysoker wrote:

> Hi Steve,
> 
> Thanks for the response.  I don't think this is the problem.  When I connect to the remote machine, it says this:
> 
> Your MySQL connection id is 58 to server version: 4.1.0-alpha-standard
> 
> When I connect to the local server, I get this:
> 
> Your MySQL connection id is 6 to server version: 4.1.10-standard
> 
> One would assume that 4.1.0 and 4.1.10 are compatible, no?
> 
Indeed. Sorry I couldn't be of more assistance. I suspected that the 
MySQLdb driver was somehow compiled with 4.0-or-earlier client software 
- is this possible?

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From http  Thu Feb  3 23:43:54 2005
From: http (Paul Rubin)
Date: 03 Feb 2005 20:43:54 -0800
Subject: advice needed for simple python web app
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
Message-ID: <7xr7jxnddh.fsf@ruckus.brouhaha.com>

"Dan Perl" <danperl at rogers.com> writes:
> Basically, what I'm looking for is a web server that accepts an HTTP
> request and invokes a python script.  But I would like a "pythonic"
> solution so a web server like Apache is a solution that I would like
> to avoid.  The server should also be as simple as possible to
> administrate.

CGI and CGIHTTPServer (or whatever it's called) is conceptually the
> simplest.  What does your app do?


From duncan.booth at invalid.invalid  Mon Feb 21 12:38:43 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 21 Feb 2005 17:38:43 GMT
Subject: Unittest - testing properties (read-only attributes)
References: <uu0o5c0br.fsf@yahoo.co.uk>
	<roy-7E7A58.12112821022005@reader2.panix.com>
	<uaKdncr3ppCbhIffRVn-rA@powergate.ca>
	<7xu0o5akr2.fsf@ruckus.brouhaha.com>
Message-ID: <Xns9604B247481Cduncanrcpcouk@127.0.0.1>

Paul Rubin wrote:

> Peter Hansen <peter at engcorp.com> writes:
>> > You want something like
>> > self.assertRaises(AttributeError, lambda: self.combat.value = 1)
>> 
>> Or, combining the two responses and avoiding the lambda:
>> 
>>   self.assertRaises(AttributeError, setattr, self.combat, 'value', 1)
>> 
>> Hmm... this might be a case where the lambda form is actually the
>> more readable one...
> 
> Yes, assignment expressions could make code more readable, if Python
> supported them.
> 

An assignment expression, if such a thing existed wouldn't help here.

The point being that the expression must be evaluated inside the exception 
handler in assertRaises, so you either need to delay the evaluation with a 
lambda, or by passing the function and arguments in separately. If you had 
an assignment expression it would be roughly equivalent to:

   self.assertRaises(AttributeError, setattr(self.combat, 'value', 1))

which will throw the AttributeError instead of passing the test.



From bh at intevation.de  Thu Feb  3 09:02:11 2005
From: bh at intevation.de (Bernhard Herzog)
Date: Thu, 03 Feb 2005 15:02:11 +0100
Subject: Hey, get this!
References: <mailman.1509.1106923923.22381.python-list@python.org>
	<ctdlpq$ukf$00$1@news.t-online.com>
	<k%WKd.98003$Jk5.87621@lakeread01> <4200E5CB.6020508@holdenweb.com>
	<s9z4qgvrpaj.fsf@salmakis.intevation.de>
Message-ID: <s9zr7jx213w.fsf@salmakis.intevation.de>

Bernhard Herzog <bh at intevation.de> writes:

> Steve Holden <steve at holdenweb.com> writes:
>>          if package:
>>              module.__path__ = sys.path
>
> You usually should initialize a package's __path__ to an empty list.

Actually, normally it's a list that contains the name of the package
directory as its only item.  I'm not sure what you should do when you do
not import from a file system.

   Bernhard

-- 
Intevation GmbH                                 http://intevation.de/
Skencil                                           http://skencil.org/
Thuban                                  http://thuban.intevation.org/


From invalidemail at aerojockey.com  Tue Feb  8 21:34:20 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 8 Feb 2005 18:34:20 -0800
Subject: A ListComp that maintains its own state (Was: Re: turing
	machine in an LC)
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
	<87mzuf9gu8.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<s9zvf93ovp8.fsf@salmakis.intevation.de>
	<pan.2005.02.08.12.47.00.135408@jerf.org>
	<s9z8y5yq1fp.fsf@salmakis.intevation.de>
	<mailman.2215.1107900386.22381.python-list@python.org>
Message-ID: <1107916460.775437.72320@c13g2000cwb.googlegroups.com>

Michael Spencer wrote:
> > Jeremy Bowers <jerf at jerf.org> writes:
> >
> >
> >>On Tue, 08 Feb 2005 17:36:19 +0100, Bernhard Herzog wrote:
> >>
> >>>Nick Vargish <nav+posts at bandersnatch.org> writes:
> >>>
> >>>>"Xah Lee" <xah at xahlee.org> writes:
> >>>>
> >>>>>is it possible to write python code without any indentation?
> >>>>
> >>>>Not if Turing-completeness is something you desire.
> >>>
> Bernhard Herzog wrote:
> ....
> a Turing Machine in one line plus assignments - nice!  Turns out that
pypy is more
> verbose than strictly necessary ;-)
> ...
>
>
> BTW, I realized that it is indeed possible for a LC to maintain its
own state
> without being passed an external mutable.  The trick is to use
itertools.repeat
> to return the same mutable object on each iteration.

Pay attention, chief.  I suggested this days ago to remove duplicates
from a list.

from itertools import *
[ x for (x,s) in izip(iterable,repeat(set()))
  if (x not in s,s.add(x))[0] ]

;)

There is a way to even avoid repeat if you're feeling EVIL.

[ x for x in iterable if x not in locals()['_[1]'].__self__ ]

Turning this into a turing machine is left as an exercise.  The recipe
in effect:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/204297


-- 
CARL BANKS



From benn at cenix-bioscience.com  Wed Feb  2 06:52:52 2005
From: benn at cenix-bioscience.com (Neil Benn)
Date: Wed, 02 Feb 2005 12:52:52 +0100
Subject: Logging
Message-ID: <4200BF14.5010408@cenix-bioscience.com>

Hello,

          I'm running a test and having issues with logging, if I call 
logging.shutdown() and then want to start the logging going again then I 
get a problem as if I call shutdown, I can't get the root logger again, 
such as :

.>>> import logging
.>>> objTestLogger = logging.getLogger()
.>>> objTestLogger.setLevel(logging.INFO)
.>>> objTestLogger.addHandler(logging.FileHandler('c:\\test.log'))
.>>> objTestLogger.info("THIS IS A TEST")
.>>> logging.shutdown()
.>>> objTestLogger = logging.getLogger()
.>>> objTestLogger.setLevel(logging.INFO)
.>>> objTestLogger.info("THIS IS A TEST")
.Traceback (most recent call last):
.  File "<stdin>", line 1, in ?
.  File "c:\program files\python23\lib\logging\__init__.py", line 893, 
in info
.    apply(self._log, (INFO, msg, args), kwargs)
.  File "c:\program files\python23\lib\logging\__init__.py", line 994, 
in _log
.    self.handle(record)
.  File "c:\program files\python23\lib\logging\__init__.py", line 1004, 
in handle
.    self.callHandlers(record)
.  File "c:\program files\python23\lib\logging\__init__.py", line 1037, 
in callHandlers
.    hdlr.handle(record)
.  File "c:\program files\python23\lib\logging\__init__.py", line 592, 
in handle
.    self.emit(record)
.  File "c:\program files\python23\lib\logging\handlers.py", line 103, 
in emit
.    self.stream.seek(0, 2)  #due to non-posix-compliant Windows feature
.ValueError: I/O operation on closed file
.>>>

    This means that I any code that write or use, if it calls 
logging.shutdown the logging is buggered for that process - is my 
analysis correct?

Cheers,

Neil

-- 

Neil Benn
Senior Automation Engineer
Cenix BioScience
BioInnovations Zentrum
Tatzberg 46
D-01307
Dresden
Germany

Tel : +49 (0)351 4173 154
e-mail : benn at cenix-bioscience.com
Cenix Website : http://www.cenix-bioscience.com



From jeff at ccvcorp.com  Thu Feb 17 15:23:24 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Thu, 17 Feb 2005 12:23:24 -0800
Subject: Pausing a program - poll/sleep/threads?
In-Reply-To: <1108666816.520517.91390@o13g2000cwo.googlegroups.com>
References: <1108625477.222091.34680@l41g2000cwc.googlegroups.com>
	<1119nf8qqj5gfbe@corp.supernews.com>
	<1108666816.520517.91390@o13g2000cwo.googlegroups.com>
Message-ID: <1119v7o1h4k8be5@corp.supernews.com>

Simon John wrote:

> As far as querying the server every few seconds, it does make sense
> (you don't miss events) and is the recommended way of doing things with
> InetCtrl, but I'd prefer to save the bandwidth/server load than have
> realtime status updates.

The amount of bandwidth and server load that will be used by a 
once-a-second query is probably pretty trivial (unless you're 
expecting this to run over internet or dialup networks -- and even 
then, it's probably not going to be worth worrying about).  Even on an 
old 10Mbit ethernet connection, a couple of extra packets every second 
will not make a notable difference.  This (IMO) is premature 
optimization.  :)

> The status also updates whenever you send a command (like play/pause).

But does the server push events to the client?  If there's a 
filesystem error while a track is playing, how does your client know 
about it?  In addition, what happens if XMMS segfaults, or the server 
machine loses power?

> I'm really stuck on how to implement this now....

One of the big questions here is whether your client will have 
exclusive access to the XMMS server.  That is, will it be possible for 
more than one such client to connect to the same XMMS, and/or for XMMS 
to have direct interaction on its host machine?

If you have exclusive access, then changes in the status of XMMS will 
only happen when 1) you change it yourself, or 2) there is an error. 
In this case, you can check status much less often.  (However, you'll 
still want to deal with the error conditions, which probably means 
checking at a much shorter interval than expected track length.) If, 
on the other hand, there may be more than one client/user interacting 
with XMMS, then you also have to deal with the possibility of your 
server changing status without your client taking direct action.

I really think that you *do* want to do fairly frequent status checks 
with your server.  The cost is small, and the gains in responsiveness 
and robustness are potentially very significant.

Jeff Shannon




From http  Fri Feb  4 11:44:25 2005
From: http (Paul Rubin)
Date: 04 Feb 2005 08:44:25 -0800
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
	<7xy8e5jagh.fsf@ruckus.brouhaha.com>
	<lFKMd.22186$8H2.13787@twister.nyroc.rr.com>
Message-ID: <7xmzuktguu.fsf@ruckus.brouhaha.com>

Kartic <removethis.kartic.krishnamurthy at gmail.com> writes:
> > Hmm, I wasn't aware that Apache 2.x gave any significant speedups
> > over 1.3 except under Windows.  Am I missing something?
> 
> Architectural differences. Apache 1.3 spawns a new process for every
> request and before you know, it brings your resources to their knees. 

Oh but it doesn't spawn new processes like that, at least if it's
configured correctly.  It uses "pre-forking", which means it spawns a
bunch of processes when you first start it running, and those
processes persist and serve requests (up to N simultaneously, where N
is the no. of processes).  Sort of like a traditional DB connection
pool.

> The CSS way is using <div> placement of the elements. Actually <div>
> gives better control over placement than with HTML tables. And with
> CSS, since you style the various HTML tags, you can create different
> "skins" for your site too. This is definitely OT, like you said, but
> if you are interested, please contact me directly. I don't pretend to
> be a CSS expert but I can help you as much as I can.

I have some interest in this but I should probably just read up on it,
if it's what everyone is doing these days.  Clearly I'm behind the
times about this stuff.


From ncoghlan at iinet.net.au  Sat Feb 12 21:01:42 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 13 Feb 2005 12:01:42 +1000
Subject: deepcopy chokes with TypeError on dynamically assigned instance
 method
In-Reply-To: <haCdnXB6cZOZBpPfRVn-1w@comcast.com>
References: <698m01djeu9jqpnvvk64vmc488e5c026im@4ax.com>	<mn0o01hsaq59bg93cfoonej8ocjsnksgal@4ax.com>	<mailman.2379.1108120960.22381.python-list@python.org>
	<haCdnXB6cZOZBpPfRVn-1w@comcast.com>
Message-ID: <420EB506.1050706@iinet.net.au>

"@t comcast d.t net <"@bag.python.org wrote:
> As an aside, what is the tuple returned by a reductor called?  What are 
> its components called?

Ya got me. Alex might have a name for it :)

>  >Normally, the methods live in the class dictionary, so they don't cause a
>  >problem with copying the instance.
>  >
> But a dynamically assigned instance method lives in the intance 
> dictionary, making deepcopy choke when it deepcopies the instance state. 
>  That makes sense now.

Yup.

> True.  It wouldn't cause a problem within my __init__, since the 
> attribute is reassigned after the deepcopy, though should anyone else 
> deepcopy an instance...  Definitely better that the deepcopy throws the 
> TypeError.  But why shouldn't we be able to copy a non-method function?

I honestly don't know, although I'm hard-pressed to see how doing so would ever 
be *useful*. Duplicating *parts* of a function would seem to make sense (to 
build a new function which is similar, but not identical), but duplicating the 
whole thing seems rather pointless. Although I guess you could just pickle it 
and then unpickle the result to make a copy :)

Again, Alex Martelli or someone else more familiar with the guts of copy.py than 
I am might be able to give a better answer if they happen to see the question.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From ilias at lazaridis.com  Mon Feb 14 04:17:28 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Mon, 14 Feb 2005 11:17:28 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cup249$svu$1@gemini.csx.cam.ac.uk>
References: <cuo71l$gig$1@usenet.otenet.gr> <cup249$svu$1@gemini.csx.cam.ac.uk>
Message-ID: <cupqb6$1oi$1@usenet.otenet.gr>

Michael Hoffman wrote:
> Ilias Lazaridis wrote:
> 
>> a) Why does the Python Foundation not provide additionally a binary
>>  version, compiled with MinGW or another open-source compiler?
> 
> I use a binary version of Python compiled with an open-source
> compiler on Windows that was provided by someone else.

Can you please point me (and the readers) to this resource?

>> b) Why does the Python Foundation not ensure, that the python 
>> source-code is directly compilable with MinGW?
> 
> Why should they? It already runs on Windows with a freely available 
> compiler.

Obvious: Courtesy [against the userbase needs]

Obvious: Consistency [same code-base across different compiler]

>> f) Are there any official (Python Foundation) statements /
>> rationales available, which explain why the MinGW compiler is
>> unsupported, although parts of the community obviously like to use
>> it?
> 
> Not to my knowledge.
[...] - (guess & comments)

thank you.

> Why don't you solve this problem and produce a patched version of 
> Python that does what you want.

I'm not intrested in patching.

I'm intrested in a stable environment, supported by the original
implementors.

I need a solid fundament for my development.

>> [google is _not_ a fried here. I like to have a stable development
>>  environment, which is supported by the official projects, thus it
>> can pass quality-assurance without beeing afraid about every next
>> release.]
> 
> Then you have several options:
> 
> a) use a supported development environment

Requirement: "full open-source tool-chain".

> b) do the work yourself to support MinGW

this would be not neccessary, as others do this work already.

My question (that you've ommited) was: why does the python foundation 
not include this efforts?

[REQUOTE]
>> c) Why are the following efforts not _directly_ included in the
>> python source code base?
>> 
>> http://jove.prohosting.com/iwave/ipython/pyMinGW.html
>> 
>> above link found in this thread:
>> 
>> http://groups-beta.google.com/group/comp.lang.python/msg/c9f0444c467de525
>> 
[/REQUOTE]

> c) pay someone else to do the work
> 
> But don't act like the volunteers who develop Python owe you a
> version of Python that runs out of the box on MinGW. They don't,
> anymore than you owe *me* a version of Python that runs out of the
> box on MinGW.

I think Python is a serious Open Source System, driven by the Python 
Foundation.

Serious Open Source Systems should serve the basic needs of their 
community, especially if there are many depending systems.

If it is a programming language, the requirement "using an open-source 
toolchain" is a rational and valid one.

The Python Foundation ingores this requirement, this way creating a
chain of neccessary manual uncontrolled actions.

This does not increase my trust in python [e.g. as an exchange for JAVA].

> Now why haven't *you* produced a version of Python that is directly 
> compileable with MinGW? Time's a-wasting.

I have stated already that I am a newcomer to python.

[you should really avoid this tenor. Python is not an open-source
project of a few teenies. It's a serious programming-language, which 
could be adopted by e.g. more phone-manufacturers (after Nokia)]

-

The Python Foundation could create an official sub-project to create an 
automated build target based on the MinGW toolchain. I am sure that many 
community members would be more than happy to contribute.

.

-- 
http://lazaridis.com


From ajsiegel at optonline.com  Sun Feb  6 13:55:16 2005
From: ajsiegel at optonline.com (Arthur)
Date: Sun, 06 Feb 2005 13:55:16 -0500
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<qb1a01lk3mv4vp852q88prqb9al336h9r2@4ax.com>
	<1grj036.r13xcy1d72inbN%aleaxit@yahoo.com>
	<2qba01d1men2ai48gp4cojo2e28rd5g9ob@4ax.com>
	<1grjzia.1a4qr9q1t3p77bN%aleaxit@yahoo.com>
	<pt1c015297m7t64cu2g27dbjbrl2ehacbi@4ax.com>
	<pan.2005.02.06.13.20.28.565408@jerf.org>
Message-ID: <i0pc01p6penbbpi5msjs7bjautgrlbc7k4@4ax.com>

On Sun, 06 Feb 2005 08:20:29 -0500, Jeremy Bowers <jerf at jerf.org>
wrote:

>On Sun, 06 Feb 2005 07:30:33 -0500, Arthur wrote:
>> What if:
>> 
>> There was a well conducted market survey conclusive to the effect that
>> adding optional strict variable declaration would, in the longer run,
>> increase Python's market share dramatically.
>> 
>> It just would.
>> 
>> Why would it?
>
>What if, by eating a special mixture of cheddar and marshmallows, you
>could suddenly fly?
>
>It just would.
>
>Why would it?
>
>(The point, since I don't trust you to get it: The "absurd question" is
>neither a valid argument technique, nor is it even good rhetoric. You
>might as well go straight to "What if I'm right and you're wrong? What
>then, huh?")

You miss my point in so many ways, its not worth enumerating.  Most
essentially is the fact that I am making no effort to be right about
anything, and don't care to be right about anything, and know better
than to hope to be  right about anything here.

>
>> My sense of how the real world works is that there is going to be one
>> anti-Python advocate lying in wait for the first bug he can find that he
>> can say would have been caught if Python had strict variable declaration,
>> as he always knew it should.
>> 
>> He wants to be the PHB someday. The current PHB knows that, and since
>> being sensitive to these kinds of realities is how he got to be the PHB,
>> he is too smart to open himself up to this kind of risk.
>> 
>> The PHB can pretty safely make the use of the option optional.  As long as
>> he is a position to jump down the throat of the programmer who created the
>> bug.
>
>You really aren't very good at this "debate" thing.

I'm a lot bettter at  it, I think, when I am trying to debate.  

*You* don't get it. I'm not. 

>
>"Look, I can construct a certain scenario whereby the dangers you propose
>don't occur (assuming that I'm even right about my scenario in the first
>place which is highly questionable). How do you respond to *that*? Huh?
>Huh? Huh? Where's your precious 'overwhelming pattern' now?"
>
>It hasn't gone anywhere.
>
>> What is the correct language design decision in light of these realities?
>
>In light of the above, I question your use of the plural.

And you would question the use of the singular, as well, if I catch
your dirft. 

>
>> But isn't this kind of where Python is at the moment?
>
>Only for you.
>
>Despite the tone of the rest of this message, I mean that. It's obviously
>a huge stumbling block for you. It isn't for the rest of us, and once
>again, I assure you, it's going to take more than spinning implausible
>isolated entirely theoretical examples to convince us otherwise.

I don't know who the rest of you are.  Whoever the rest of you are,
I'm OK with not being one of you. Really I am.

>Not only do you argue solely from anecdote, even the aforementioned
>"implausible isolated entirely theoretical" anecdote, it appears to be all
>you understand. You're going to have to do better than that. Producing a
>*real* study that shows declaration would be a good thing, instead of an
>implausible entirely theoretical one, would be a good start.

I am arguing, to the extent that I am arguing, from the hypothetical.
You can counter by saying that my hypothical premise is not even a
possiblity.

Among what you don't understand. I think, is that I would be wishing
that you were right.  But of course you wouldn't be.

Art 


From bdesth.quelquechose at free.quelquepart.fr  Mon Feb 14 14:27:27 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 14 Feb 2005 20:27:27 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2539.1108397140.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr>	<4210a434$0$23451$626a14ce@news.free.fr>
	<mailman.2539.1108397140.22381.python-list@python.org>
Message-ID: <4210f923$0$20570$636a15ce@news.free.fr>

jfj a ?crit :
> bruno modulix wrote:
> 
>> Ilias Lazaridis wrote:
>>
>>> I'm a newcomer to python:
>>>
>>> [EVALUATION] - E01: The Java Failure - May Python Helps?
>>> http://groups-beta.google.com/group/comp.lang.python/msg/75f0c5c35374f553 
>>>
>>>
>>
>> My trollometer's beeping...
>>
> 
> When person 'A' calls person 'B' a troll, these are the possibilities:
> 
> 1. 'A' is indeed a troll
> 
> 2. 'B' is the troll
> 
> 3. both 'A' and 'B' are trolls
> 
> 4. nobody is a troll. they're computer scientists passionate about their 
> ideas and they are trying to convince each other.
> 
> 5. nobody is a troll and there is no trolling going on.
> 
> Now, it's rather common to accuse people of trolling these days.
> The fact that Markus Wankus said that Ilias is a troll does not mean
> that everybody should reply to him in that tone.
> This is a one .vs many battle and it sucks.
> 
You're totaly right. Now just take some minutes to (re)read this thread, 
then google for 'Ilias Lazaridis'.

Bruno


From steve at holdenweb.com  Fri Feb  4 09:28:31 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 04 Feb 2005 09:28:31 -0500
Subject: regular expression match collection
In-Reply-To: <1107525832.015932.286300@f14g2000cwb.googlegroups.com>
References: <1107525832.015932.286300@f14g2000cwb.googlegroups.com>
Message-ID: <yJLMd.103067$Jk5.58987@lakeread01>

ajikoe at gmail.com wrote:

> Hello,
> 
> For example I have a string : "Halo by by by"
> Then I want to take and know the possition of every "by"
> how can I do it in python?
> 
> I tried to use:
> 
>   p = re.compile(r"by")
>   m = p.search("Helo by by by")
>   print m.group() # result "by"
>   print m.span()  # result (5,7)
> 
> How can I get the information of the other by ?
> 
> Sincerely Yours,
> Pujo Aji
> 
You need re.findall() (or, equivalently, the findall() method of an re).

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From cjw at sympatico.ca  Mon Feb 28 16:55:28 2005
From: cjw at sympatico.ca (Colin J. Williams)
Date: Mon, 28 Feb 2005 16:55:28 -0500
Subject: Pythonwin: Red squiggley underline and syntax error
In-Reply-To: <Kfudne3HApR08r7fRVn-2A@comcast.com>
References: <juadnQtUmsOo9b7fRVn-tQ@comcast.com>
	<Kfudne3HApR08r7fRVn-2A@comcast.com>
Message-ID: <42239350.306@sympatico.ca>

Steven Bethard wrote:
> Brent W. Hughes wrote:
> 
>> I copied and pasted some text into my Python code and then Pythowin 
>> put a red squiggley underline under the two tabs at the beginning of 
>> the line. What does that mean?  I've tried various things including 
>> deleting the white space in front of the line and reinserting the 
>> tabs.  I've also tried retyping the entire line.  Sometimes, I can get 
>> the red line to go away but when I try to run the program, it gives me 
>> a syntax error on the line that had the red underline.  Help!
> 
> 
> You've probably mixed tabs with spaces in your indentation somewhere. 
> Either replace all tabs with spaces or replace all spaces with tabs.
> 
> STeVe
The former is generally recommended.

Colin W.


From pronovic at skyjammer.com  Wed Feb 23 18:37:16 2005
From: pronovic at skyjammer.com (Kenneth Pronovici)
Date: Wed, 23 Feb 2005 17:37:16 -0600
Subject: LC_ALL and os.listdir()
In-Reply-To: <421cf088$0$8788$9b622d9e@news.freenet.de>
References: <mailman.2959.1109142240.22381.python-list@python.org>
	<421cf088$0$8788$9b622d9e@news.freenet.de>
Message-ID: <20050223233716.GA1320@skyjammer.com>

On Wed, Feb 23, 2005 at 10:07:19PM +0100, "Martin v. L?wis" wrote:
> So we have three options:
> 1. skip this string, only return the ones that can be
>    converted to Unicode. Give the user the impression
>    the file does not exist.
> 2. return the string as a byte string
> 3. refuse to listdir altogether, raising an exception
>    (i.e. return nothing)
> 
> Python has chosen alternative 2, allowing the application
> to implement 1 or 3 on top of that if it wants to (or
> come up with other strategies, such as user feedback).

Understood.  This appears to be the most flexible solution among the
three.

> >3) The proper "general" way to deal with this situation?
> 
> You can chose option 1 or 3; you could tell the user
> about it, and then ignore the file, you could try to
> guess the encoding (UTF-8 would be a reasonable guess).

Ok.

> >My goal is to build generalized code that consistently works with all
> >kinds of filenames.
> 
> Then it is best to drop the notion that file names are
> character strings (because some file names aren't). You
> do so by converting your path variable into a byte
> string. To do that, you could try
[snip]
> So your code would read
> 
> try:
>   path = path.encode(sys.getfilesystemencoding() or
>                      sys.getdefaultencoding())
> except UnicodeError:
>   print >>sys.stderr, "Invalid path name", repr(path)
>   sys.exit(1)

This makes sense to me.  I'll work on implementing it that way.

Thanks for the in-depth explanation!

KEN

-- 
Kenneth J. Pronovici <pronovic at ieee.org>
Personal Homepage: http://www.skyjammer.com/~pronovic/
"They that can give up essential liberty to obtain a little 
 temporary safety deserve neither liberty nor safety." 
      - Benjamin Franklin, Historical Review of Pennsylvania, 1759 


From bvande at po-box.mcgill.ca  Thu Feb 10 23:09:16 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Thu, 10 Feb 2005 23:09:16 -0500
Subject: Unit Testing in Python
In-Reply-To: <1108087841.271630.228970@o13g2000cwo.googlegroups.com>
References: <1108087841.271630.228970@o13g2000cwo.googlegroups.com>
Message-ID: <420C2FEC.5090303@po-box.mcgill.ca>

rhat said unto the world upon 2005-02-10 21:10:
> Hi Everyone,
> I've recently been reading some articles about unit-testing in Python
> [1] [2], but I am a bit confused: where do I go to get started with
> this? I tried googling for "unittest" but all I've found are some old
> links to projects that already use it, and the older (as the articles
> put it) PyUnit project. I'm sorry if this is a obvious question or one
> that has already been answered, but unit-testing sounds interesting and
> I'm not sure where to start.
> 
> Thanks,
> Ryan Kaulakis
> 

Hi,

I've just started learning about testing and TDD, but I found the 
following recent articles and blog posts useful:

<http://agiletesting.blogspot.com/2005/01/python-unit-testing-part-1-unittest.html>
<http://agiletesting.blogspot.com/2005/01/python-unit-testing-part-2-doctest.html>
<http://agiletesting.blogspot.com/2005/01/python-unit-testing-part-3-pytest-tool.html>
<http://www.onlamp.com/lpt/a/5463>
<http://www.onlamp.com/lpt/a/5584>

(Your footnotes didn't come through, so these might not be new to you.)

Best,

Brian vdB



From Dennis.Benzinger at gmx.net  Thu Feb 10 12:19:46 2005
From: Dennis.Benzinger at gmx.net (Dennis Benzinger)
Date: Thu, 10 Feb 2005 18:19:46 +0100
Subject: pyclbr
In-Reply-To: <mailman.2307.1108042213.22381.python-list@python.org>
References: <mailman.2307.1108042213.22381.python-list@python.org>
Message-ID: <420b97b1$1@news.uni-ulm.de>

Fernando San Mart?n Woerner wrote:
> Hi guys!
> 
> i'm using pycblr to implement a class browser for my app, i got some
> issues about it:
> 
> i did:
> 
> dict = pyclbr.readmodule(name, [dir] + sys.path)

Don't use dict (or the name of any other built-in function)
as an identifier! It shadows the built-in function and can be quite
confusing for others reading your code.

It's sufficient to give only [dir] as the second parameter.
sys.path is always searched.
(http://docs.python.org/lib/module-pyclbr.html)

> but  this only works one time, i mean if module "name" is changed and
> some class were added or removed i can't see any changes even if i
> execute readmodule again.
> 
> any idea?, thanks in advance

pyclbr caches modules it has already read. I think there is no method
for clearing that cache, so you have to

reload(pyclbr)

in order to see your changes.


Bye,
Dennis


From fredrik at pythonware.com  Thu Feb  3 02:41:57 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 3 Feb 2005 08:41:57 +0100
Subject: Awkwardness of C API for making tuples
References: <dave.opstad-E4D4C4.07281701022005@reader0900.news.uu.net><1107289261.185768.116790@f14g2000cwb.googlegroups.com>
	<pRhMd.6933$i6.60496@nasal.pacific.net.au>
Message-ID: <ctskii$p54$1@sea.gmane.org>

Dave Cole wrote:

>     for (i = 0; i < num_values; i++) {
> PyObject *obj;
>
> obj = PyInt_FromLong(value[i]);
> if (obj == NULL
>             || PyTuple_SetItem(tuple, i, obj) != 0) {
>     Py_DECREF(tuple);
>     return NULL;
> }
>     }

in theory, if PyInt_FromLong succeeds, and PyTuple_SetItem fails, you'll leak
an object.

</F> 





From shoot at the.moon  Mon Feb  7 16:30:28 2005
From: shoot at the.moon (Steve Horsley)
Date: Mon, 07 Feb 2005 21:30:28 +0000
Subject: socket question
In-Reply-To: <pan.2005.02.07.17.48.10.131474@philippecmartin.com>
References: <mailman.2089.1107796309.22381.python-list@python.org>
	<36pm9uF53qlqdU1@individual.net>
	<pan.2005.02.07.17.48.10.131474@philippecmartin.com>
Message-ID: <cu8mkr$gv6$2@news.freedom2surf.net>

Philippe C. Martin wrote:
> Thanks you! that did it.
> 

That makes me wonder what socket.gethostname() was returning.
It wasn't 'localhost', was it?

Steve


From evenprimes at gmail.com  Wed Feb 16 10:10:26 2005
From: evenprimes at gmail.com (Chris Cioffi)
Date: Wed, 16 Feb 2005 10:10:26 -0500
Subject: low-end persistence strategies?
In-Reply-To: <37h2keF5a2ijjU1@individual.net>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<37h194F50j4pkU1@individual.net> <7xfyzwehq7.fsf@ruckus.brouhaha.com>
	<37h2keF5a2ijjU1@individual.net>
Message-ID: <f03f4fdf05021607103339fe7@mail.gmail.com>

I'd like to second this one...ZODB is *extremely* easy to use.  I use
it in projects with anything from a couple dozen simple objects all
the way up to a moderately complex system with several hundred
thousand stored custom objects.  (I would use it for very complex
systems as well, but I'm not working on any right now...)

There are a few quirks to using ZODB, and the documentation sometimes
feel lite, but mostly that's b/c ZODB is so easy to use.

Chris


On Wed, 16 Feb 2005 15:11:46 +0100, Diez B. Roggisch <deetsNOSPAM at web.de> wrote:
> Paul Rubin wrote:
> 
> > "Diez B. Roggisch" <deetsNOSPAM at web.de> writes:
> >> Maybe ZODB helps.
> >
> > I think it's way too heavyweight for what I'm envisioning, but I
> > haven't used it yet.  I'm less concerned about object persistence
> > (just saving strings is good enough) than finding the simplest
> > possible approach to dealing with concurrent update attempts.
> 
> And that's exactly where zodb comes into play. It has full ACID support.
> Opening a zodb is a matter of three lines of code - not to be compared to
> rdbms'ses. And apart from some standard subclassing, you don't have to do
> anything to make your objects persistable. Just check the tutorial.
> --
> Regards,
> 
> Diez B. Roggisch
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
"It is our responsibilities, not ourselves, that we should take
seriously." -- Peter Ustinov


From nav+posts at bandersnatch.org  Sun Feb 20 16:29:34 2005
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: Sun, 20 Feb 2005 16:29:34 -0500
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr>
	<42185b05$0$15460$9b622d9e@news.freenet.de>
	<cv9sdo$69n$3@usenet.otenet.gr>
	<42189527$0$6260$9b622d9e@news.freenet.de>
	<cvadcj$mqc$1@usenet.otenet.gr>
	<mailman.2866.1108917759.22381.python-list@python.org>
	<cvafgu$2lk$1@usenet.otenet.gr>
	<4218cafe$0$8790$9b622d9e@news.freenet.de>
	<1108922969.140196.304380@z14g2000cwz.googlegroups.com>
Message-ID: <878y5i9ayp.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>

"BrainDead" <breamoreboy at aol.com> writes:

> I believe that you are wasting your time.  Looking at your email
> address, this may well be relevant.
  [ 4-line URL snipped ]

Thanks for the historical reference. Please consider a visit to
tinyurl.com before posting a monster like that... :^)

Nick

-- 
#  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this to a python
print reduce(lambda x,y:x+chr(ord(y)-1),' Ojdl!Wbshjti!=obwAcboefstobudi/psh?')


From apardon at forel.vub.ac.be  Thu Feb 10 03:11:21 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 10 Feb 2005 08:11:21 GMT
Subject: Is email package thread safe? (fwd)
References: <mailman.2245.1107959519.22381.python-list@python.org>
	<slrnd0k9jt.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2269.1107980125.22381.python-list@python.org>
Message-ID: <slrnd0m5p9.26q.apardon@rcpc42.vub.ac.be>

Op 2005-02-09, Roman Suzi schreef <rnd at onego.ru>:
> On Wed, 9 Feb 2005, Antoon Pardon wrote:
>
>> Op 2005-02-09, Roman Suzi schreef <rnd at onego.ru>:
>>>
>>> Just to be sure, is email package of Python 2.3 thread-safe or not
>>> (to use, for example, in python-milter?)
>
>>> Can I assume that everything
>>> else without such notice is thread-safe?
>>
>> I doubt it. There is no indication that the email package uses any
>> kind of locking. So multiple thread working on the same message
>> will probably screw things up.
>
> Of course, I do not let threads to work on the same message!

Why should that be: "off course"? The random module you spoke about
was also only thread unsafe if you called the same random generator
from various threads. Using a randon generator per thread shouldn't
have been a problem. Since you mentioned that, I thought that was
the kind of thread safety you were after.

> I meant that the package doesn't pose other kinds of restrictions.
> Can it work in _any_ situation work on two different messages at the same 
> time, without any interference?

I can't give a guarantee, but there are no global statements and there
doesn't seem to be assignments to cross module variables I think it
would be a safe bet.

-- 
Antoon Pardon


From mefjr75 at hotmail.com  Mon Feb  7 01:45:45 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 6 Feb 2005 22:45:45 -0800
Subject: Memory Allocation?
References: <8GCNd.9880$ya6.9761@trndny01>
Message-ID: <1107758745.493713.190530@z14g2000cwz.googlegroups.com>

Hello Chris,
I am sure there are many inaccuracies in this story  but hey you asked
instead of seeking your owns answers so....
In general you need not worry about  memory allocation.
Too be more specific objects have a size and most of them are known (at
least to a wizard named Tim) , but it doesn't really matter  because it
doesn't work like that in Python.
CPython interpreter( I have never read a lick of the source this all
from late nite memory  ) just grabs a chunk of memory and uses it as it
sees fit . Jython uses Java's GC . and etc..
Now tell me do you really want to take out the garbage or look at it?
Python does it for you so you don't have too.
But don't let me stop you.
You can probably still find some way to do it.
It is open source after all.
M.E.Farmer



From rspivak at nuxeo.com  Sun Feb 27 15:31:11 2005
From: rspivak at nuxeo.com (Ruslan Spivak)
Date: Sun, 27 Feb 2005 22:31:11 +0200
Subject: default value for list access?
In-Reply-To: <cvt92e$fkj$1@joe.rice.edu>
References: <cvsumh$7i2$1@joe.rice.edu>  <cvt92e$fkj$1@joe.rice.edu>
Message-ID: <1109536271.20914.23.camel@fc3>

? ???, 27/02/2005 ? 14:03 -0600, Bo Peng ?????:
> To clearify the problem:
> 
> The data is the count of something, for example a[90]=10. a may be a 
> dictionary if the range is huge and a list when the range is reasonably 
> small. In the dictionary case, I can use a.setdefault(80, 0) if key 80 
> does not exist. In the list case, I have to check the length of list 
> before I access it (or use exception).
> 
> This becomes troublesome when I need to do the following a lot.
> 
>    b = a[80][1] + a[80][2] + a[80][3]
> 
> If I use the getItem function in my previous email, it will look like
> 
>    b = getItem(getItem(a, 80, []), 1, 0) + getItem(getItem(a, 80, []), 
> 2, 0) + getItem(getItem(a, 80, []), 3, 0)
> 
> What would be the best solution to handle this? Something like
> 
>    b = df( a[80][1], 0) + df( a[80][2], 0) + df( a[80][3], 0)
> 
> would be reasonable but df can not be easily defined since the exception 
> will be raised before function df is called. Something like
> 
>    b = df( a, [80, 1], 0) + df( a, [80,2], 0) + df( a, [80, 3], 0)
> 
> would work if df is defined as
> 
> def df(a, idx, default):
>    try:
>      for i in range(0, idx):
>        a = a[ idx[i] ]
>      return a
>    except:
>      return 0
> 
> but I am afraid that a for loop would bring serious performance problem.
> 
> Thanks.
> 
> Bo

I'm not sure if that's suitable for you, but you could define your own
subclasses for 'dict' and 'list' and specify your specific behaviour you
would like.

For dict something like this:

class MyDict(dict):
    def __getitem__(self, key):
        try:
            return super(MyDict, self).__getitem__(key)
        except:
            return 0

a = MyDcit()

Ruslan




From http  Mon Feb 14 17:19:32 2005
From: http (Paul Rubin)
Date: 14 Feb 2005 14:19:32 -0800
Subject: array of bits?
References: <cur7k9$4g7$1@lust.ihug.co.nz>
Message-ID: <7x3bvyzswb.fsf@ruckus.brouhaha.com>

MM <mm at newsgroups.com> writes:
> What is the best structure/way to create an array of bits (actually
> true/false flags) of an arbitrary length ranging from about 20 upto
> about 500. Speed of access more of an issue than compactness.

Use a normal list: [False, False, True, False, True, ... ] .


From ncoghlan at iinet.net.au  Sat Feb 12 20:52:59 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 13 Feb 2005 11:52:59 +1000
Subject: a sequence question
In-Reply-To: <5VqPd.19723$uc.17393@trnddc08>
References: <lzrKd.138680$K7.56500@news-server.bigpond.net.au><Xns95EC9DCBC6294duncanrcpcouk@127.0.0.1>	<mailman.1553.1106960946.22381.python-list@python.org><WYXOd.16353$uc.1671@trnddc02>	<mailman.2388.1108127294.22381.python-list@python.org><Ft5Pd.26094$uc.8481@trnddc03>	<mailman.2434.1108179260.22381.python-list@python.org>
	<5VqPd.19723$uc.17393@trnddc08>
Message-ID: <420EB2FB.8090707@iinet.net.au>

David Isaac wrote:
> "Nick Coghlan" <ncoghlan at iinet.net.au> wrote in message
> news:mailman.2434.1108179260.22381.python-list at python.org...
> 
>>A bug report on Sourceforge would help in getting the problem fixed for
> 
> the 2.5
> 
>>docs
> 
> 
> Done.

Bug 1121416, for anyone else interested. Looks Raymond agrees with me about the 
left-to-right evaluation of iterables being an overspecification.

Anyway, that means the zip and izip based solutions are technically version and 
implementation specific. Fortunately, the final versions are fairly easy to turn 
into a custom generator that doesn't rely on izip:

from itertools import islice, chain, repeat

def partition(iterable, part_len):
     itr = iter(iterable)
     while 1:
         item = tuple(islice(itr, part_len))
         if len(item) < part_len:
             raise StopIteration
         yield item

def padded_partition(iterable, part_len, pad_val=None):
     padding = repeat(pad_val, part_len-1)
     itr = chain(iter(iterable), padding)
     return partition(itr, part_len)

Py> list(partition(range(10), 3))
[(0, 1, 2), (3, 4, 5), (6, 7, 8)]
Py> list(padded_partition(range(10), 3))
[(0, 1, 2), (3, 4, 5), (6, 7, 8), (9, None, None)]
Py> list(padded_partition(range(10), 3, True))
[(0, 1, 2), (3, 4, 5), (6, 7, 8), (9, True, True)]

Well spotted on the fact that the way we were using zip/izip was undocumented, 
btw :)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From victor at gdsmail.gds.co.za  Wed Feb  2 13:05:14 2005
From: victor at gdsmail.gds.co.za (victor at gdsmail.gds.co.za)
Date: Wed, 02 Feb 2005 20:05:14 +0200
Subject: Inflex scan report [020220054666]
Message-ID: <200502021805.j12I5Hci004695@gdsmail.gds.co.za>

Administrator Email Reply Address: victor
Email sent to:  dragondm at integral.org
Inflex ID: 020220054666
Report Details -----------------------------------------------
AntiVirus Results...
00:03 _headers_
00:03 text.zip 
00:03 Text.bat
>>> Virus 'W32/MyDoom-O' found in file /usr/local/inflex/tmp/inf_020220054666/unpacked/text.zip/Text.bat
>>> Virus 'W32/MyDoom-O' found in file /usr/local/inflex/tmp/inf_020220054666/unpacked/text.zip


END OF MESSAGE.

End.
.


From xah at xahlee.org  Tue Feb 15 07:48:24 2005
From: xah at xahlee.org (Xah Lee)
Date: 15 Feb 2005 04:48:24 -0800
Subject: [perl-python] problem: reducing comparison
In-Reply-To: <1108450348.253772.158120@z14g2000cwz.googlegroups.com>
References: <1108450348.253772.158120@z14g2000cwz.googlegroups.com>
Message-ID: <1108471704.220626.27530@g14g2000cwa.googlegroups.com>

here are the answers:

Perl code:

sub reduce ($$) {
my %hh= %{$_[0]}; # e.g. {'1,2'=>[1,2],'5,6'=>[5,6],...}
my ($j1,$j2)=($_[1]->[0],$_[1]->[1]);  # e.g. [3,4]
delete $hh{"$j1,$j2"};
foreach my $k (keys %hh) {
        $k=~m/^(\d+),(\d+)$/;
        my ($k1,$k2)=($1,$2);
        if ($k1==$j1) {
            if ($j2 < $k2) {
                delete $hh{"$j2,$k2"};
            }
            else {
                delete $hh{"$k2,$j2"};
            };
        };
        if ($k2==$j1) {
            if ($k1 < $j2) {
                delete $hh{"$k1,$j2"};
            }
            else {
                delete $hh{"$j2,$k1"};
            };
        };
    }
return \%hh;
}


?Python code.
?
?def reduce(pairings, pair):
?    ps=pairings.copy(); j=pair;
?    ps.pop("%d,%d"%(j[0],j[1]),0)
?    for k in pairings.itervalues():
?        if (k[0]==j[0]):
?            if (j[1] < k[1]):
?                ps.pop("%d,%d"%(j[1],k[1]),0)
?            else:
?                ps.pop("%d,%d"%(k[1],j[1]),0)
?        if (k[1]==j[0]):
?            if (k[0] < j[1]):
?                ps.pop("%d,%d"%(k[0],j[1]),0)
?            else:
?                ps.pop("%d,%d"%(j[1],k[0]),0)
?    return ps
?

In imperative languages such as Perl and Python and Java, in general it
is not safe to delete elements when looping thru a list-like entity.
(it screws up the iteration) One must make a copy first, and work with
the copy.

Note also that in Python there's already a function called reduce. (it
is equivalent to Mathematica's Fold.) In Python, looks like user can
over-ride default functions.

This post is archived at
http://xahlee.org/perl-python/pairing_reduce.html
Possible errata or addenda will appear there.

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From fumanchu at amor.org  Tue Feb 15 12:42:58 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Tue, 15 Feb 2005 09:42:58 -0800
Subject: customizing metaclass constructed classes
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E3398430@exchange.hqamor.amorhq.net>

Robin Becker wrote:
> I have a set of classes for database access which are 
> constructed using a 
> special metaclass and base class.
> 
> so in the base module
> 
> #base.py
> class M(type):
>     def __init__(cls, name, bases, dict):
>        super(M, cls).__init__(name, bases, dict)
>        for f in dict['_fieldDefs']:
>            #create special property based on the field def
>            ....
> 
> class A(object):
>     __metaclass__ = M
>     _fieldDefs = []
> 
>     #base methods
>     ......
> 
> in the database module we use the above
> eg
> 
> #database.py
> class C(A):
>    _fieldDefs =[
>      IntColumn('id',primaryKey=1,allowNull=0),
>      TextColumn('name',allowNull=0,size=50),
>      TextColumn('description',allowNull=1,size=50),
>      ]
> 
> Now to my question: can I change the definition of the client 
> class C at run 
> time? I want to do something like add another element to C's 
> _fieldDefs and then 
> get it to go through the construction phase provided by M. 
> It's clearly 
> pointless for me to try something like
> 
> from database import C
> C._fieldDefs.append(....)
> 
> as C is constructed by the import.
> I either have to delay C's construction or reconstruct it.
> 
> Would something like this do?
> 
> def reconstruct():
>      import database
>      class C(database.C):
>        _fieldDefs = database.C._fieldDefs+[......]
>      database.C = C
> 
> Is there a better way to do this which preserves more of C's 
> original identity? 
> I suppose I want to call the metaclass initialization again, 
> but can't see a way to do that.

You *are* using a language with callable functions, right? ;)

#base.py

def create_special_property(cls, f):
   # create special property based on f

class M(type):
    def __init__(cls, name, bases, dict):
       super(M, cls).__init__(name, bases, dict)
       for f in dict['_fieldDefs']:
           create_special_property(cls, f)

#database.py
class C(A):
   _fieldDefs =[
     IntColumn('id',primaryKey=1,allowNull=0),
     TextColumn('name',allowNull=0,size=50),
     TextColumn('description',allowNull=1,size=50),
     ]

base.create_special_property(C, DateColumn('start_date'))

Slightly off-topic: if you really want to make it pretty, add a custom
descriptor so you can write:

class C(A):
   id = IntColumn(primaryKey=1,allowNull=0)
   name = TextColumn(allowNull=0,size=50)
   description = TextColumn(allowNull=1,size=50)

See UnitProperty (the descriptor), MetaUnit (the metaclass), and Unit
(the domain object) in http://www.aminus.org/rbre/dejavu/__init__.py for
an implementation of mine which you can steal in toto (because it's
public domain).


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org


From tjreedy at udel.edu  Mon Feb 14 13:23:14 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 14 Feb 2005 13:23:14 -0500
Subject: newbie question - identifying name of method
References: <1108396343.218224.79980@c13g2000cwb.googlegroups.com>
Message-ID: <cuqq65$lek$1@sea.gmane.org>


<mirandacascade at yahoo.com> wrote in message 
news:1108396343.218224.79980 at c13g2000cwb.googlegroups.com...
> Does Python provide some sort of mechanism for answering the question:
> what method am I in?

I believe that Python, the language defined in the Ref Manual, does not. 
The CPython implementation adds enough introspection into its workings that 
you can get at the function code definition name, with the simplest method 
being the one given by Fredrik.  If you want the names currently bound to 
the function object in a particular namespace, you have to do something 
else.

Terry J. Reedy





From tjreedy at udel.edu  Thu Feb 17 14:49:04 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 17 Feb 2005 14:49:04 -0500
Subject: difference between class methods and instance methods
References: <pan.2005.02.17.07.04.37.907754@yahooz.com>
Message-ID: <cv2sa4$3ft$1@sea.gmane.org>


"John M. Gabriele" <john_sips_teaz at yahooz.com> wrote in message 
news:pan.2005.02.17.07.04.37.907754 at yahooz.com...
> And if anyone's *really* daring:
> Where do the so-called "static methods" fit into all this?
> By the name of them, it sounds like the same thing as class
> methods...

No, not at all.  So called 'static methods' are class function attibutes 
that are marked to *not* be given neither the method wrapping treatment nor 
the first-arg binding treatment when accessed, but to be left as they are. 
To me, this means that they are not methods but just functions.

>>> class C:
...   def f(): pass
...   def g(): pass
...   g = staticmethod(g)
...
>>> C.f
<unbound method C.f>
>>> C.g
<function g at 0x00888978>

Terry J. Reedy





From fredrik at pythonware.com  Sun Feb  6 11:38:00 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 6 Feb 2005 17:38:00 +0100
Subject: bad generator performance
References: <mailman.2021.1107701834.22381.python-list@python.org>
	<cu5er6$417$04$1@news.t-online.com>
Message-ID: <cu5h2k$p3l$1@sea.gmane.org>

Johannes Ahl-mann wrote:

> the program is supposed to manage bookmarks and i thought it would be a
> good idea to represent the bookmarks as a tree (with folders as internal
> nodes and bookmarks as leaves).
> so, a tree is never going to hold more than say 2000 nodes and is going
> to be rather wide than deep!

maybe

    http://pyxml.sourceforge.net/topics/xbel/

stored and manipulated using

    http://effbot.org/zone/element-index.htm

would simplify things for you?

</F> 





From adomas.paltanavicius at gmail.com  Sun Feb  6 06:00:33 2005
From: adomas.paltanavicius at gmail.com (Adomas)
Date: 6 Feb 2005 03:00:33 -0800
Subject: How do I convert arithemtic string (like "2+2") to a number?
In-Reply-To: <36m92pF52msqlU1@individual.net>
References: <mailman.1996.1107640917.22381.python-list@python.org>
	<1107641467.104883.177850@c13g2000cwb.googlegroups.com>
	<mailman.2010.1107673611.22381.python-list@python.org>
	<1107674970.152776.164170@c13g2000cwb.googlegroups.com>
	<36m92pF52msqlU1@individual.net>
Message-ID: <1107687633.712157.142040@g14g2000cwa.googlegroups.com>

Well, a bit more secure would be

eval(expression, {'__builtins__': {}}, {})

or alike.



From peter at engcorp.com  Wed Feb 16 20:39:38 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 16 Feb 2005 20:39:38 -0500
Subject: PythonCard and Py2Exe
In-Reply-To: <1108604319.052270.170430@l41g2000cwc.googlegroups.com>
References: <1108476282.790371.155670@l41g2000cwc.googlegroups.com>
	<mailman.2620.1108476543.22381.python-list@python.org>
	<1108484617.908022.280320@l41g2000cwc.googlegroups.com>
	<acq57pnf.fsf@python.net>
	<1108604319.052270.170430@l41g2000cwc.googlegroups.com>
Message-ID: <jOCdnY_u55-Ta47fRVn-3w@powergate.ca>

pipedreamergrey at gmail.com wrote:
>>You should move these 'import ...' statements to your *script* so that
>>py2exe doesn find them, not to the setup script.
> 
> Removing import statements only returns this error message before the
> package compiles:
> 
> = "custdb",
> 'setup' is not defined
> 
> No files are returned.

Please use "cut and paste" to copy the *actual* error into your
message, rather than retyping (and removing critical information).

Also, if the setup.py script is not too large (less than about
20 lines) post it as well.

-Peter


From fredrik at pythonware.com  Tue Feb 15 09:07:56 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 15 Feb 2005 15:07:56 +0100
Subject: PythonCard and Py2Exe
References: <1108476282.790371.155670@l41g2000cwc.googlegroups.com>
Message-ID: <cusvj7$ed1$1@sea.gmane.org>

PipedreamerGrey at yahoo.com wrote:

> I've been banging my head against this problem for a week.  It's time
> to ask for help, because I'm obviously not going to solve this by trial
> and error.  I'm trying to create a standalone version (.exe) of
> PythonCard's Custdb sample using Py2Exe version 0.5.0.  Everytime I
> attempt to compile the program, I get an error during compilation.  I
> need to formulate the correct setup file.  Here's the one I began with:
>
>
> from distutils.core import setup
> from PythonCard import dialog, model
> import PythonCard
> import py2exe
>
> setup( name = "custdb",
>       console = ["custdb.py"],
>       data_files = [ (".", ["custdb.ini", "custdb.rsrc.py",
> "customerdata.csv"]) ]
>       )
>
> Every variation of this format failed.

failed, as in?  did you get an error message?  can you post the error message?

</F> 





From paul at boddie.org.uk  Mon Feb 28 13:42:41 2005
From: paul at boddie.org.uk (Paul Boddie)
Date: 28 Feb 2005 10:42:41 -0800
Subject: best XSLT processor?
References: <yvgUd.9678$_G.5042@clgrps12>
Message-ID: <5339b60d.0502281042.38274f37@posting.google.com>

fanbanlo <henryho at NO__SPAMM_.telus.net> wrote in message news:<yvgUd.9678$_G.5042 at clgrps12>...
> Which XSLT processor is the most reliable?
> 
> requirement:
> + must support Python 2.4
> + must run w/ Windows (and Linux)
> + not super slow

I've had success with libxslt [1] (and libxml2 [2]) on Linux with
Python 2.3.x and earlier, and I imagine that it's portable enough to
work successfully on Windows and has already been tested with Python
2.4. Moreover, I don't think many people complain about the
performance of libxslt/libxml2. ;-)

If you find the supplied Python bindings for libxml2 either
"un-Pythonic" or insufficiently DOM-like, you might want to try lxml
[3] or libxml2dom [4].

Paul

[1] http://xmlsoft.org/XSLT/
[2] http://www.xmlsoft.org/
[3] http://www.xml.com/cs/user/view/cs_msg/2280
[4] http://www.python.org/pypi?:action=display&name=libxml2dom


From fredrik at pythonware.com  Tue Feb 15 11:52:49 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 15 Feb 2005 17:52:49 +0100
Subject: Copying data between file-like objects
References: <pan.2005.02.15.09.01.29.555879@ID-174572.user.uni-berlin.de>
Message-ID: <cut97m$gcd$1@sea.gmane.org>

Thomas Lotze wrote:

> f1.write(f2.read()) doesn't seem to me as efficient as it might be, as a
> string containing all the contents of f2 will be created and thrown away.

if f2 isn't too large, reading lots of data in one operation is often the most
efficient way (trust me, the memory system is a lot faster than your disk)

if you don't know how large f2 can be, use shutil.copyfileobj:

    >>> help(shutil.copyfileobj)
    Help on function copyfileobj in module shutil:

    copyfileobj(fsrc, fdst, length=16384)
        copy data from file-like object fsrc to file-like object fdst

> In the case of two StringIO objects, this means there's a point when the
> contents is held in memory three times.

to copy stringio objects, you can use f1 = StringIO(f2.getvalue()).  why you
would want/need to do this is more than I can figure out, though...

</F> 





From grante at visi.com  Mon Feb  7 22:51:26 2005
From: grante at visi.com (Grant Edwards)
Date: 08 Feb 2005 03:51:26 GMT
Subject: Big development in the GUI realm
References: <mailman.2123.1107820051.22381.python-list@python.org>
	<4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com>
	<cu95nd$7cr$1@news1.ucsd.edu>
	<6h7g0113up1v76k7qkad7bt17os1q73510@4ax.com>
	<4208237b$0$21623$a1866201@visi.com> <cu98n4$833$1@news1.ucsd.edu>
Message-ID: <4208373e$0$21620$a1866201@visi.com>

On 2005-02-08, Robert Kern <rkern at ucsd.edu> wrote:
> Grant Edwards wrote:
>
>> Spare us your clueless, junior-high legal analyses 
>
> [etc.]
>
> Hey! There's no need for name-calling. This is a tricky legal area that 
> can be very confusing even to the most legal-minded of us. While I think 
> "Luke" is incorrect in several respects and is somewhat uninformed about 
> others, he doesn't deserve this vitriol.

Sorry if I was a bit blunt, but I'm sick of people trying to
weasle their way around a license by creative interpretation of
the license terms when the licensors made their intentions as
clear as possible.

I've released software under the GPL, and I really pisses me
off when I see people trying to violate the spirit and intent
of the license becuase they want to use GPL'ed software but
they don't want to abide by the terms of the license.  

If you want to use one of my libraries that's under the GPL and
you don't want to release your source code, then do the right
thing:

  1) Release your code under the GPL.

  2) Write your own library.

  3) Ask me to let you use it under the LGPL or a different
     license.  [I've agreed everytime the request has been made.]

I've got no patience at all for people who sit around playing
word games and coming up with bad analogies to try to justify
using somebody else's software without author's permission.

I don't _care_ why somebody thinks they should be able to use
Trolltech's software for a non-GPL'ed program without paying
for it when Trolltech has stated explicitly that they're not
allowed to do that.

-- 
Grant Edwards                   grante             Yow!  I'm DESPONDENT... I
                                  at               hope there's something
                               visi.com            DEEP-FRIED under this
                                                   miniature DOMED STADIUM...


From kartic.krishnamurthy at gmail.com  Fri Feb  4 13:54:19 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 4 Feb 2005 10:54:19 -0800
Subject: newbie: Syntax error
In-Reply-To: <TrPMd.13383$3W3.8066@bignews4.bellsouth.net>
References: <TrPMd.13383$3W3.8066@bignews4.bellsouth.net>
Message-ID: <1107543259.359788.126670@f14g2000cwb.googlegroups.com>

Chad,

The usage is like this:
- if <cond1>:
-     <block 1>
- elif <cond2>:
-     <block 2>
- else:
-     <block 3>

So, your code should be:
if tries == 1:
....
elif tries == 2:
....

(You have 'else' followed by a condition...hence a syntax error. else
is what it means - "if no other condition is satisfied". You should use
'elif' for subsequent conditions after 'if'.)

Thanks,
-Kartic



From roy at panix.com  Tue Feb  8 08:29:23 2005
From: roy at panix.com (Roy Smith)
Date: Tue, 08 Feb 2005 08:29:23 -0500
Subject: Is Python as capable as Perl for sysadmin work?
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
Message-ID: <roy-A0C89A.08292308022005@reader2.panix.com>

In article <pan.2005.02.08.04.01.16.605059 at yahooz.com>,
 "John M. Gabriele" <john_sips_teaz at yahooz.com> wrote:

> I recently posted this sort of question to the c.l.p.m but
> didn't get much of a response. I know a little Perl and a
> little Python, but master neither at the moment.
> 
> I see that Python is a general purpose OO programming language
> that finds use among some system administrators, but my guess
> is that Perl is still more common in that area than Python.
> 
> For sysadmin-related tasks, is Python as useful as Perl, or
> does it get clumsy when often dealing with the stuff admins
> deal with on a regular basis?
> 
> At some point during some dingy job in the back boiler room
> of Unix, would you find yourself saying, "geez, I'd wish I
> started this with Perl -- Python just isn't cutting it." ?
> 
> Thanks,
> ---J

Given that Perl was *designed* for sysadmin work, it's not surprising that 
there are some features of it which make it very convenient to use in that 
arena.  For executing external commands, nothing really comes close to 
Perl's back-tick syntax.  For doing things like reading a sequence a files 
and filtering the combined contents with regular expressions, Perl is 
probably the tool that lets you do that in the most compact way.

As a general-purpose programming language, it sucks.  My personal opinion 
is that the general-purpose suckitude outweighs the domain-specific 
sysadmin convenience.


From usenet at mail-2-me.com  Wed Feb  9 08:51:17 2005
From: usenet at mail-2-me.com (Dirk Hagemann)
Date: 9 Feb 2005 05:51:17 -0800
Subject: Datatype of non-negative values
Message-ID: <a37aa972.0502090551.42319b92@posting.google.com>

Hi,

Is there a datatype in python which allows no negative values? I
subtract several times something from a value and I don't want to chek
everytime if this value is still bigger or equal 0.

Thanks for help!
Dirk Hagemann


From jzgoda at gazeta.usun.pl  Thu Feb  3 16:58:41 2005
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Thu, 03 Feb 2005 22:58:41 +0100
Subject: bytecode obfuscation
In-Reply-To: <mailman.1837.1107465982.22381.python-list@python.org>
References: <mailman.1837.1107465982.22381.python-list@python.org>
Message-ID: <ctu72f$fs3$1@nemesis.news.tpi.pl>

snacktime napisa?(a):

> Everything except the libraries that actually connect to the
> bank networks would be open source, and those libraries aren't
> something that you would even want to touch anyways.

This sounds suspicious to me. Really. Normal payment clearance programs 
have open-spec API's.

-- 
Jarek Zgoda
http://jpa.berlios.de/ | http://www.zgodowie.org/


From lbates at syscononline.com  Wed Feb  9 15:49:16 2005
From: lbates at syscononline.com (Larry Bates)
Date: Wed, 09 Feb 2005 14:49:16 -0600
Subject: two questions - no common theme
In-Reply-To: <e5063e96.0502091207.37b1dd54@posting.google.com>
References: <e5063e96.0502091207.37b1dd54@posting.google.com>
Message-ID: <KJadnfNJPOTR6pffRVn-tQ@comcast.com>

...how do I get hold of a list of its subdirectories?

This does what you asked for:

import os
targetpath='c:\\'
all=os.listdir(targetpath)
subdirs=[x for x in all
          if os.path.isdir(os.path.join(targetpath, x))]

But you may need to take a look at os.walk (as others
have suggested) also.

Larry Bates

Sean McIlroy wrote:
> And now for a pair of questions that are completely different:
> 
> 1) I'd like to be able to bind callbacks to presses of the arrow
> buttons on the keyboard. How do you say that in Tkinter?
> 
> 2) The function 'listdir' in os.path returns a list of all the files
> in the given directory - how do I get hold of a list of its
> subdirectories?
> 
> Any help will be greatly appreciated.
> 
> Peace,
> STM


From matternc at comcast.net  Fri Feb  4 16:39:24 2005
From: matternc at comcast.net (Chris Mattern)
Date: Fri, 04 Feb 2005 16:39:24 -0500
Subject: [perl-python] get web page programatically
References: <1107543599.362575.210730@o13g2000cwo.googlegroups.com>
Message-ID: <AKidnUp1n6ATdp7fRVn-jA@comcast.com>

Xah Lee wrote:

<snip>

Just the standard warnings for any novices unfamiliar with Mr. Lee.
Mr. Lee's posts are regularly riddled with severe errors (I found
the assertion that LWP::Simple and LWP::UserAgent aren't part of
the standard base perl install a particularly amusing one in this 
particular post).  Please be advised that you should get your
perl information from accurate sources.  http://learn.perl.org
is an excellent place to start, with pointers to excellent Perl
books and even some readable for free online (notably Beginning
Perl).
-- 
             Christopher Mattern

"Which one you figure tracked us?"
"The ugly one, sir."
"...Could you be more specific?"


From peter at engcorp.com  Wed Feb  9 17:49:04 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 09 Feb 2005 17:49:04 -0500
Subject: Newbie:  SWIG or SIP?
In-Reply-To: <ZL-dndtxrspB5ZffRVn-tg@comcast.com>
References: <cKKdnfEhSpyv65ffRVn-qg@comcast.com>
	<ZL-dndtxrspB5ZffRVn-tg@comcast.com>
Message-ID: <XL6dnQxrPefmDpffRVn-uw@powergate.ca>

Larry Bates wrote:
> You can call the .DLL file by using a solution
> I wrote (and donated) some time ago.  It is located here:
> 
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/146847
> 
> You will need calldll.pyd available here:
> 
> http://www.nightmare.com/software.html

While calldll works for this (and I greatly appreciated having
it in the past), I'm pretty sure that for pretty much all
purposes "ctypes" is the preferred approach at this point.
If nothing else, it is actively maintained, while calldll is not.
I'm pretty sure ctypes is also easier to use.

-Peter


From FBatista at uniFON.com.ar  Wed Feb 16 09:51:10 2005
From: FBatista at uniFON.com.ar (Batista, Facundo)
Date: Wed, 16 Feb 2005 11:51:10 -0300
Subject: Getting milliseconds in Python
Message-ID: <A128D751272CD411BC9200508BC2194D053C7FAF@escpl.tcp.com.ar>

[mjs7231]

#- I am trying to record how long an operation takes, but can't seem to
#- find a function that will allow me to record the timestamp in
#- milliseconds, maybe I am looking in the wrong place?

Use time.time().

>>> import time
>>> def f():
	t = time.time()
	[x**2 for x in range(50000)]
	t = time.time() - t
	print "%.2f msec" % (t*1000)

	
>>> f()
16.00 msec
>>> 


.    Facundo

Bit?cora De Vuelo: http://www.taniquetil.com.ar/plog
PyAr - Python Argentina: http://pyar.decode.com.ar/


  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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son para uso exclusivo del destinatario y pueden contener informaci?n
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Si Ud. No es uno de los destinatarios consignados o la persona responsable
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en cualquier medio magn?tico) que pueda haber realizado del mismo.
Todas las opiniones contenidas en este mail son propias del autor del
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From vincent at visualtrans.de  Tue Feb  1 16:26:22 2005
From: vincent at visualtrans.de (vincent wehren)
Date: Tue, 01 Feb 2005 22:26:22 +0100
Subject: Printing Filenames with non-Ascii-Characters
In-Reply-To: <36a3ikF4uk8r0U1@individual.net>
References: <36a3ikF4uk8r0U1@individual.net>
Message-ID: <ctos5r$t3b$1@news2.tilbu1.nb.home.nl>

Marian Aldenh?vel wrote:
> Hi,
> 
> I am very new to Python and have run into the following problem. If I do
> something like
> 
>   dir = os.listdir(somepath)
>   for d in dir:
>      print d
>             
> The program fails for filenames that contain non-ascii characters.
> 
>   'ascii' codec can't encode characters in position 33-34:

If you read this carefully, you'll notice that Python has tried and 
failed to *encode* a decoded ( = unicode) string using the 'ascii' 
codec. IOW, d seems to be bound to a unicode string. Which is unexpected 
unless maybe the argument passed to os.listdir (somepath) is a Unicode 
string, too. (If given a Unicode string as argument, os.listdir will 
return the list as a list of unicode names).

If you're printing to the console, modern Pythons will try to guess the 
console's encoding (e.g. cp850). I would expect a UnicodeEncodeError if 
the print fails because the characters do not map to the console's 
encoding, not the error you're seeing.

How *are* you running the program. In the console (cmd.exe)? Or from 
some IDE?

> 
> I have noticed that this seems to be a very common problem. I have read 
> a lot
> of postings regarding it but not really found a solution. Is there a simple
> one?
> 
> What I specifically do not understand is why Python wants to interpret the
> string as ASCII at all. Where is this setting hidden?

Don't be tempted to ever change sys.defaultencoding in site.py, this is 
site specific, meaning that if you ever distribute them, programs 
relying on this setting may fail on other people's Python installations.

--
Vincent Wehren

> 
> I am running Python 2.3.4 on Windows XP and I want to run the program on
> Debian sarge later.
> 
> Ciao, MM


From kent37 at tds.net  Sat Feb 19 08:54:38 2005
From: kent37 at tds.net (Kent Johnson)
Date: Sat, 19 Feb 2005 08:54:38 -0500
Subject: lambda closure question
In-Reply-To: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
Message-ID: <42174213_1@newspeer2.tds.net>

Ted Lilley wrote:
> What I want to do is pre-load functions with arguments by iterating
> through a list like so:
> 
> 
>>>>class myclass:
> 
> ...    pass
> 
>>>>def func(self, arg):
> 
> ...    print arg
> 
>>>>mylist = ["my", "sample", "list"]
>>>>for item in mylist:
> 
> ...    setattr(myclass, item, lamdba self: func(self, item))
> 
> This attaches a list of functions to the class, making them bound
> methods when called from a class instance.
> 
> 
>>>>obj = myclass()
>>>>obj.list()
> 
> list
> Unfortunately, it doesn't work.  It seems the closure keeps track of
> the variable fed to it dynamically - if the variable changes after the
> lambda is created, the lambda still references the _variable_ not the
> original _value_ and so gets the new value like so:
> 
> 
>>>>obj.sample()
> 
> list
> 
>>>>obj.my()
> 
> list

The closure isn't bound until the scope containing it is exited. A simple workaround is to bind item 
as a default argument to the lambda:
for item in mylist:
     setattr(myclass, item, lambda self, item=item: func(self, item))

You can also make a helper function that returns the closure, the closure will be bound each time 
the helper returns:

def make_f(item):
     def f(self): func(self, item)
     return f

mylist = ["my", "sample", "list"]
for item in mylist:
     setattr(myclass, item, make_f(item))

Kent


From tim.peters at gmail.com  Tue Feb  1 12:37:47 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Tue, 1 Feb 2005 12:37:47 -0500
Subject: Where are list methods documented?
In-Reply-To: <41ffba7d$0$15879$a1866201@visi.com>
References: <41ffba7d$0$15879$a1866201@visi.com>
Message-ID: <1f7befae050201093732daefb2@mail.gmail.com>

[Grant Edwards]
> I'm trying to figure out how to sort a list, and I've run into
> a problem that that I have tripped over constantly for years:
> where are the methods of basic types documented?

The methods on mutable sequence types are documented in the Library
manual's section on mutable sequence types:

    http://docs.python.org/lib/typesseq-mutable.html

> The only thing I can find on a list's sort() method is in the tutorial
> where it states:

You could have found the above by, e.g., looking up "sort" in the
Library manual's index.


From mwm at mired.org  Sat Feb 26 20:46:06 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 26 Feb 2005 19:46:06 -0600
Subject: Xlib in Python? I need XDrawString()
References: <pan.2005.02.27.00.09.22.178913@yahoo.com>
Message-ID: <86acpqg4gx.fsf@guru.mired.org>

Artificial Life <phark52 at yahoo.com> writes:

> All I really want is to write a few strings to the background of my X
> display. XDrawString() is what I need. The Xlib for Python shows it's out
> dated. Is there any alternative? 

If you're referring to <URL:
http://sourceforge.net/projects/python-xlib >, what makes you think
it's outdated? Development on a package sometimes stops when it
reaches a state that the authors are happy with - which is what's
happened here. It works just fine. If not, the authors can be reached
about bug fixes, etc.

      <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From tjreedy at udel.edu  Sat Feb 26 13:49:55 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 26 Feb 2005 13:49:55 -0500
Subject: Watermark on images
References: <1109403419.904324.115860@f14g2000cwb.googlegroups.com>
	<1109408051.728870.35790@f14g2000cwb.googlegroups.com>
Message-ID: <cvqg4i$18v$1@sea.gmane.org>


"Michele Simionato" <michele.simionato at gmail.com> wrote in message 
news:1109408051.728870.35790 at f14g2000cwb.googlegroups.com...

> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/362879

Googling "Python image watermark" and first hit is !!!
ASPN : Python Cookbook : Watermark with PIL ... Description: Apply a 
watermark to an image using the Python Imaging Library. Supports color, 
tiling, scaling, and opacity reduction. Source: Text Source. ...
      aspn.activestate.com/ASPN/Cookbook/Python/Recipe/362879 - 27k - Feb 
24, 2005 - Cached - Similar pages


Learn to use it folks.  Get a Google bar.  Faster and easier than posting 
here.

Terry J. Reedy





From http  Mon Feb 28 13:54:02 2005
From: http (Paul Rubin)
Date: 28 Feb 2005 10:54:02 -0800
Subject: Explicit or general importing of namespaces?
References: <1109588238.491145.52060@l41g2000cwc.googlegroups.com>
	<38gc2tF5o34sbU1@individual.net>
	<MZ6dnUVa97IJkr7fRVn-3w@powergate.ca>
Message-ID: <7x7jksplbp.fsf@ruckus.brouhaha.com>

Peter Hansen <peter at engcorp.com> writes:
> Ultimately more important than mere "pollution" are the
> latent problems this can cause if any of the names in
> the original module can ever be re-bound.

You know, this is another reason the compiler really ought to (at
least optionally) check for such shadowing and have a setting to
enforce user declarations, like perl's "use strict".


From deetsNOSPAM at web.de  Mon Feb  7 06:59:22 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 07 Feb 2005 12:59:22 +0100
Subject: Confused with methods
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<TL-dneoHycPA35vfRVn-qQ@rogers.com>
	<mailman.2027.1107713399.22381.python-list@python.org>
	<1grl578.1rmaukw1yyw0g4N%aleaxit@yahoo.com>
	<mailman.2059.1107774429.22381.python-list@python.org>
Message-ID: <36p3aaF4tdk23U1@individual.net>

> HOWEVER, what I ask is WHY don't we set the tp_descr_get of
> the boundmethod object to be the same as the func_descr_get???
> Or WHY do they *have* to differ in this specific part?
> 
> I quickly looked at the source of python and it seems that a
> one-liner would be enough to enable this. So it's not that it
> would be hard to implement it, or inefficient.
> 
> A bound method would *still* be a boundmethod.
> We could additionally have:
> 
>  >>>type(x)
>   <boundmethod of <boundmethod of <boundmethod of....<__main__.A
> instance at 0x>>>
> 
> If there a good reason that the __get__ of a boundmethod does not
> create a new boundmethod wrapper over the first boundmethod?

I already gave you the good reason:

class A:
   def callback(self, arg):
       print self, arg

def callback(arg):
    print arg

class DoSomethingWithCallback:
    def __init__(self, cb):
        self.cb = cb

    def run(self):
        for i in xrange(100):
             self.cb(i)

u = DoSomethingWithCallback(A().callback)
v = DoSomethingWithCallback(callback)

# would crash if your suggestion worked
u.run()
v.run()


Bound methods aren't a general purpose currying scheme - they exist sorely
for the OO-style implicit first argument. That they exist at all is a great
difference to e.g. C++, where you can't pass callbacks around that are
instance methods. 

If you are after currying - look at the cookbook, there are recipes for
that.
-- 
Regards,

Diez B. Roggisch


From steven.bethard at gmail.com  Mon Feb 21 00:02:08 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 20 Feb 2005 22:02:08 -0700
Subject: help please
In-Reply-To: <1108959170.585091.202240@z14g2000cwz.googlegroups.com>
References: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
	<TPKdnU2eEu9xPJPfRVn-vg@comcast.com>
	<1108260752.791847.180060@l41g2000cwc.googlegroups.com>
	<Z4ydnbKMDLVvEJLfRVn-hA@comcast.com>
	<1108324679.451793.147890@z14g2000cwz.googlegroups.com>
	<i_ydnb41nJ68IZLfRVn-gw@comcast.com>
	<1108329540.239064.144920@f14g2000cwb.googlegroups.com>
	<j7udnc1ZGqsAUZLfRVn-3w@comcast.com>
	<1108334012.336816.221460@g14g2000cwa.googlegroups.com>
	<joSdnbH-qqzBZpLfRVn-tg@comcast.com>
	<1108921146.274248.11500@g14g2000cwa.googlegroups.com>
	<hbydnV4bvrCxcIXfRVn-1w@comcast.com>
	<1108959170.585091.202240@z14g2000cwz.googlegroups.com>
Message-ID: <fOKdnTxVOKHT9oTfRVn-rg@comcast.com>

gargonx wrote:
> Even if i put it in exactly the way you did:
> 
>>>>import re
>>>>charmatcher = re.compile(r' [A-Z] [\d]?')
>>>>
>>>>ext = dict(D="V1", O="M1", G="S1")
>>>>std = dict(S="H")
>>>>
>>>>decode_replacements ={}
>>>>decode_replacements.update([(std[key], key) for key in std])
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AttributeError: keys

What version of Python are you using?  Here's what I get:

PythonWin 2.4 (#60, Nov 30 2004, 09:34:21) [MSC v.1310 32 bit (Intel)] 
on win32.
Portions Copyright 1994-2004 Mark Hammond (mhammond at skippinet.com.au) - 
see 'Help/About PythonWin' for further copyright information.
py>
py> import re
py> charmatcher = re.compile(r' [A-Z] [\d]?')
py>
py> ext = dict(D="V1", O="M1", G="S1")
py> std = dict(S="H")
py>
py> decode_replacements = {}
py> decode_replacements.update([(std[key], key) for key in std])

As you can see, I'm using Python 2.4.  I'm guessing you're using an 
earlier version.  I just checked the docs for dict.update:

"update() accepts either another mapping object or an iterable of 
key/value pairs (as a tuple or other iterable of length two). If keyword 
arguments are specified, the mapping is then is updated with those 
key/value pairs: "d.update(red=1, blue=2)". Changed in version 2.4: 
Allowed the argument to be an iterable of key/value pairs and allowed 
keyword arguments."

So dict.update() only accepts a list of key/value pairs as of 2.4 I 
guess.  Try:

py> decode_replacements.update(dict([(std[key], key) for key in std]))

I believe that, unlike dict.update, the dict constructor allowed a list 
of key/value pairs previous to Python 2.4.  If that doesn't work either, 
you can do the more verbose version:

py> for key in std:
...     decode_replacements[std[key]] = key
...

STeVe


From steven.bethard at gmail.com  Thu Feb 17 02:44:17 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 17 Feb 2005 00:44:17 -0700
Subject: difference between class methods and instance methods
In-Reply-To: <pan.2005.02.17.07.04.37.907754@yahooz.com>
References: <pan.2005.02.17.07.04.37.907754@yahooz.com>
Message-ID: <FcydnRLnuorM1onfRVn-2g@comcast.com>

John M. Gabriele wrote:
> 1. Are all of my class's methods supposed to take 'self' as their
> first arg?

If by "class's methods" you mean methods on which you called 
classmethod, then no, they shouldn't take a 'self' parameter, they 
should take a 'cls' parameter because the first argument to the function 
will be the class:

class C(object):
     @classmethod
     def f(cls, *args):
         # do stuff

Undecorated methods (e.g. those that are not wrapped with classmethod or 
staticmethod) should, on the other hand, take a 'self' parameter.

> 2. Am I then supposed to call them with MyClass.foo() or instead:
> 
>     bar = MyClass()
>     bar.foo()

Classmethods should be called from the class.  Python allows you to call 
them from the instance, but this almost never does what you want, e.g.:

py> d = {}
py> d.fromkeys(range(4))
{0: None, 1: None, 2: None, 3: None}
py> d
{}

Note that 'd' is not updated -- I called a classmethod, not an 
instancemethod.  If I had called dict.fromkeys instead, this would have 
been clearer.

> 3. Is "bound method" a synonym for instance method?
> 
> 4. Is "unbound method" a synonym for class method?

No.  To simplify things a little[1], a "bound method" is an instance 
method that has been associated with a specific instance, and an 
"unbound method" is an instance method that has not been associated with 
a specific instance.  Consider the difference between str.join and ''.join:

py> str.join
<method 'join' of 'str' objects>
py> ', '.join
<built-in method join of str object at 0x01233620>
py> str.join(['a', 'b', 'c'])
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
TypeError: descriptor 'join' requires a 'str' object but received a 'list'
py> ', '.join(['a', 'b', 'c'])
'a, b, c'
py> str.join(', ', ['a', 'b', 'c'])
'a, b, c'

In the example above, you can see that str.join is an "unbound method" 
-- when I try to call it without giving it an instance, it complains. 
On the other hand, ', '.join is a "bound method" because it has been 
bound to a specific instance of str (in this case, the instance ', '). 
When I call it without an instance, it doesn't complain because it's 
already been bound to an instance.

> Where do the so-called "static methods" fit into all this?
> By the name of them, it sounds like the same thing as class
> methods...

Staticmethods, like classmethods, are associated with the class object, 
not the instance objects.  The main difference is that when a 
staticmethod is called, no additional arguments are supplied, while when 
a classmethod is called, a first argument, the class, is inserted in the 
argument list:

py> class C(object):
...     @classmethod
...     def f(*args):
...         print args
...     @staticmethod
...     def g(*args):
...         print args
...
py> C.f(1, 2, 3)
(<class '__main__.C'>, 1, 2, 3)
py> C.g(1, 2, 3)
(1, 2, 3)

STeVe

[1] Technically, I think classmethods could also considered to be "bound 
methods" because in this case, the method is associated with a specific 
instance of 'type' (the class in which it resides) -- you can see this 
in the first argument that is supplied to the argument list of a 
classmethod.


From tundra at tundraware.com  Fri Feb  4 12:28:12 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 04 Feb 2005 12:28:12 EST
Subject: OT: why are LAMP sites slow?
In-Reply-To: <mailman.1887.1107526336.22381.python-list@python.org>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>	<kavad2-59d.ln1@eskimo.tundraware.com>
	<mailman.1887.1107526336.22381.python-list@python.org>
Message-ID: <nkncd2-jnm.ln1@eskimo.tundraware.com>

Fredrik Lundh wrote:

> Tim Daneliuk wrote:
> 
> 
>>THis is why, IMHO, things like SOAP a laughable - RPC is a poor
>>foundation for reliable, durable, and high-performance TP.  It might be
>>fine for sending an order or invoice now and then, but sustained through-
>>put of the sort I think of as "high" performance is likely never going to be
>>accomplished with session-oriented architectures.
> 
> 
> does 50 gigabytes per day, sustained, count as high performance in your book?
> 
> </F> 
> 
> 
> 

'Depends.  It is certainly a high-volume application.  But is it
transactional?  Is it online or batch?  Does it have correctness
guarantees and so forth ...   You can ftp 50 gigabytes in one
day with big enough network pipes, but that does not a transactional
system make, for example ...

-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From exogen at gmail.com  Mon Feb 14 06:34:05 2005
From: exogen at gmail.com (Brian Beck)
Date: Mon, 14 Feb 2005 06:34:05 -0500
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cuq084$r99$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr>
Message-ID: <cuq2h0$j2s$1@eeyore.INS.cwru.edu>

Ilias Lazaridis wrote:
 > this answer do not fit in most questions.
 >
 > please review them again.

Actually, it does. Please review them again.

> My questions:
 >
> a) Why does the Python Foundation not provide additionally a binary version, compiled with MinGW or another open-source compiler?

Because no one has yet volunteered their time and effort to get the job 
done.

> b) Why does the Python Foundation not ensure, that the python source-code is directly compilable with MinGW?

Because no one has yet volunteered their time and effort to get the job 
done.

> c) Why are the following efforts not _directly_ included in the python source code base?

Because no one has yet volunteered their time and effort to get the job 
done.

> d) Is it really neccessary that I dive into such adventures, to be able to do the most natural thing like: "developing python extensions with MinGW"?

Yes, because no one has yet volunteered their time and effort to get the 
job done.

> f) Are there any official (Python Foundation) statements / rationales available, which explain why the MinGW compiler is unsupported, although parts of the community obviously like to use it? 

The most likely response you will get is: Because no one has yet 
volunteered their time and effort to get the job done.

> I ask some questions and suggest some things.
> 
> Voluntarlily and without beeing paid.

What a martyr you are.

> There are many commercial systems around python.
> 
> So please stop this volunteerism-stuff.

If the support you're looking for is beneficial to your commercial 
application a.k.a. business, then why aren't you making it happen? 
Obviously the existing commercial development teams are doing fine 
without it, otherwise it would exist. Even then, a commercial developer 
providing their development work to enhance the standard Python 
distribution IS volunteering.

--
Brian Beck
Adventurer of the First Order


From nemesis at nowhere.invalid  Wed Feb  2 14:26:00 2005
From: nemesis at nowhere.invalid (Nemesis)
Date: Wed, 02 Feb 2005 19:26:00 GMT
Subject: Finding user's home dir
Message-ID: <5i9rtc.rq31.ln@orion.homeinvalid>

Hi all, I'm trying to write a multiplatform function that tries to
return the actual user home directory. I saw that
os.path.expanduser("~") works on Linux but on Windows2000 (at least on
the win I used) it returns %USERPROFILE%, so I tried os.environ["HOME"]
and it gave me the same results. So I ended up with
os.environ["USERPROFILE"], it doesn't work on Linux but (at least) on
Windows2000 it returns the correct information

I googled a little bit and it seems that there is no general solution,
so I tried to merge what I found, and I wrote this little function:

def getHomeDir():
    ''' Try to find user's home directory, otherwise return current directory.'''
    try:
        path1=os.path.expanduser("~")
    except:
        path1=""
    try:
        path2=os.environ["HOME"]
    except:
        path2=""
    try:
        path3=os.environ["USERPROFILE"]
    except:
        path3=""

    if not os.path.exists(path1):
        if not os.path.exists(path2):
            if not os.path.exists(path3):
                return os.getcwd()
            else: return path3
        else: return path2
    else: return path1

Please, could you test it on your systems and tell me what you got?
I'd like to know what it returns on different operating systems because
I'm developing a multiplatform software.

Thank you all.
-- 
Unauthorized amphibians will be toad away.
 
 |\ |       |HomePage   : http://nem01.altervista.org
 | \|emesis |XPN (my nr): http://xpn.altervista.org



From jgrahn-nntq at algonet.se  Sun Feb  6 12:33:48 2005
From: jgrahn-nntq at algonet.se (Jorgen Grahn)
Date: 6 Feb 2005 17:33:48 GMT
Subject: How do I enter/receive webpage information?
References: <1107560030.834943.174250@f14g2000cwb.googlegroups.com>
	<slrnd0a171.rr5.jgrahn-nntq@frailea.sa.invalid>
	<87oeeywr4j.fsf@pobox.com>
Message-ID: <slrnd0cl4p.rr5.jgrahn-nntq@frailea.sa.invalid>

On 05 Feb 2005 22:58:52 +0000, John J. Lee <jjl at pobox.com> wrote:
> Jorgen Grahn <jgrahn-nntq at algonet.se> writes:
> [...]
>> I did it this way successfully once ... it's probably the wrong approach in 
>> some ways, but It Works For Me.
>> 
>> - used httplib.HTTPConnection for the HTTP parts, building my own requests
>>   with headers and all, calling h.send() and h.getresponse() etc.
>> 
>> - created my own cookie container class (because there was a session
>>   involved, and logging in and such things, and all of it used cookies)
...

> I see little benefit and significant loss in using httplib instead of
> urllib2, unless and until you get a particulary stubborn problem and
> want to drop down a level to debug.  It's easy to see and modify
> urllib2's headers if you need to get low level.

That's quite possibly true. I remember looking at and rejecting
urllib/urllib2, but I cannot remember my reasons. Maybe I didn't feel they
were documented well enough (in Python 2.1, which is where I live).

[more useful info snipped]

/Jorgen

-- 
  // Jorgen Grahn <jgrahn@       Ph'nglui mglw'nafh Cthulhu
\X/                algonet.se>   R'lyeh wgah'nagl fhtagn!


From fredrik at pythonware.com  Tue Feb  1 02:26:11 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 1 Feb 2005 08:26:11 +0100
Subject: tkinter: Can You Underline More Than 1 Char In A Menu Title
References: <d00nc2-ctm.ln1@eskimo.tundraware.com><056uv054s4ionvjt2ii8fcnm3hvcqqm8g2@4ax.com>
	<eel3d2-ds3.ln1@eskimo.tundraware.com>
Message-ID: <ctnatj$aio$1@sea.gmane.org>

Tim Daneliuk wrote:

>>>However, I intend to actually have two separate keys invoke this menu
>>>to have it behave differently in different circumstances.
>>
>> You can, of course, CHANGE the underlined character to match the
>> circumstances.
>
> Yeah, I understand that ... what I want is two characters simulatenously
> underlined ... oh well, another solution will be arranged...

if you want a menu choice to have different behaviour depending on what
key you use to invoke them, you should use two different choices.

</F> 





From grante at visi.com  Thu Feb 10 12:45:37 2005
From: grante at visi.com (Grant Edwards)
Date: 10 Feb 2005 17:45:37 GMT
Subject: [N00B] What's %?
References: <614c778e.0502100938.6665cb52@posting.google.com>
Message-ID: <420b9dc1$0$29504$a1866201@visi.com>

On 2005-02-10, administrata <administrata at hotmail.com> wrote:

> I don't understand about % like...
>
> 107 % 4 = 3
> 7 % 3 = 1

It's the modulus operator.  It returns the remainder of integer
division.  As we used to say in second grade:

 4 goes into 107 26 times with 3 left over.

 3 goes into 4 2 times with 1 left over. 

-- 
Grant Edwards                   grante             Yow!  If I pull this SWITCH
                                  at               I'll be RITA HAYWORTH!! Or
                               visi.com            a SCIENTOLOGIST!


From mefjr75 at hotmail.com  Sat Feb  5 02:36:39 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 4 Feb 2005 23:36:39 -0800
Subject: PythonWin and PyWin32
In-Reply-To: <1107586934.983669.201020@z14g2000cwz.googlegroups.com>
References: <1107586934.983669.201020@z14g2000cwz.googlegroups.com>
Message-ID: <1107588999.408717.320580@z14g2000cwz.googlegroups.com>

Chris Lott wrote:
>More to the point, do I need to worry
>about this as I am learning about Python, since Idle and the Windows
>Installer seem to work fine on my XP box?
Relax this is Python :)
Not sure why you would worry at all about any IDE.
Especially when they your current IDE works fine.
To answer the other question PythonWin is written by Mark Hammond (
PyWin32 ) .
It contains a lot of really cool Python/Windows enhancements and has a
makepy utiity so you can wrap activex X controls with Python and use at
will from your windows machine.
Idle was written by GvR so it comes with Python.
hth ,
M.E.Farmer



From ncoghlan at iinet.net.au  Thu Feb 24 05:00:38 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Thu, 24 Feb 2005 20:00:38 +1000
Subject: Style guide for subclassing built-in types?
In-Reply-To: <1109208924.563510.212500@f14g2000cwb.googlegroups.com>
References: <ba1e306f.0502221846.70cb4d5c@posting.google.com>	<1109127834.660822.247120@g14g2000cwa.googlegroups.com>	<1109150091.356411.150460@l41g2000cwc.googlegroups.com>	<1109151417.903188.73790@f14g2000cwb.googlegroups.com>	<421c76cd$1_1@newspeer2.tds.net>	<1109163706.118457.53720@z14g2000cwz.googlegroups.com>	<mailman.2977.1109182909.22381.python-list@python.org>
	<1109208924.563510.212500@f14g2000cwb.googlegroups.com>
Message-ID: <421DA5C6.4020504@iinet.net.au>

janeaustine50 at hotmail.com wrote:
> Thank you but your advice doesn't fit in my case since I want to keep
> the memory usage and the initial time minimum. iterable[::-1] would
> build another list and it would take big memory and time during
> reversing if iterable were huge. (and the "iterable" wouldn't be
> garbage-collected because I want to keep a reference to it)

1. Do you have benchmark results or a mathematical analysis to show that 
duplicating the list uses too much memory, or is too slow to startup?

2. Do you have quantitative definitions for "too much" and "too slow", and 
rationale to back up those numbers?

3. Do you have a benchmark to determine if attempting to reduce memory 
consumption and start-up time has a detrimental effect on run-time performance?

If the answer to any of the above questions is 'no', then just do something like:

from itertools import islice, chain
def twisted_iter(orig):
     halfway, skip_middle = divmod(len(orig), 2)
     fwditr = islice(iter(orig), halfway + skip_middle, None)
     revitr = islice(reversed(orig), halfway, None)
     return chain(revitr, fwditr)

Py> from itertools import islice, chain
Py> def twisted_iter(orig):
...     halfway, skip_middle = divmod(len(orig), 2)
...     fwditr = islice(iter(orig), halfway + skip_middle, None)
...     revitr = islice(reversed(orig), halfway, None)
...     return chain(revitr, fwditr)
...
Py> list(twisted_iter(range(10)))
[4, 3, 2, 1, 0, 5, 6, 7, 8, 9]
Py> list(twisted_iter(range(11)))
[5, 4, 3, 2, 1, 0, 6, 7, 8, 9, 10]

Since twisted_iter is actually a highly-optimised twisted view of the original 
list, you may want to just leave the original list alone, and create 
twisted_iter's when you want them.

However, if you mainly use the twisted view, and only occasionally want the 
original view, then you can twist it once, store the result, discard the 
original, and twist it again to get the original back:

Py> list(twistediter(list(twistediter(range(10)))))
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
Py> list(twistediter(list(twistediter(range(11)))))
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

Those benchmarks I mentioned earlier will let you know which approach is best.

No-optimisations-without-measurements-'ly,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From google at vertigrated.com  Thu Feb 17 20:37:26 2005
From: google at vertigrated.com (fuzzylollipop)
Date: 17 Feb 2005 17:37:26 -0800
Subject: having troubleing finding package for Twisted 1.3 for Mac OS X
	10.3.x
Message-ID: <1108690646.289866.268380@l41g2000cwc.googlegroups.com>

just got a Powerbook and need to do twisted development on it, but I
can't find a simple straight foward instructions on installing Twisted
1.3 on it.

Also the package manager at undefined.org has 1.1.0 and it doesn't work
with 10.3.x ( pre-installed Python )

any help is welcome



From bigmaddrongo at yahoo.co.uk  Mon Feb  7 08:01:58 2005
From: bigmaddrongo at yahoo.co.uk (Russell Bungay)
Date: Mon, 07 Feb 2005 13:01:58 +0000
Subject: Tar module issue
In-Reply-To: <mailman.2060.1107775422.22381.python-list@python.org>
References: <mailman.2060.1107775422.22381.python-list@python.org>
Message-ID: <cu7or0$470$1@pump1.york.ac.uk>

Hello,

> I'm using tarfile module to create an archive. For my example I'm using
> Amsn file and directory tree.
> My variables are like these ones: 
> path = /home/chaica/downloads/amsn-0_94/skins/Tux/smileys/shades.gif
> fileName = amsn-0_94/skins/Tux/smileys/shades.gif
> tar.add( path, fileName )
> and while untaring my archive with tar jxvf I've random errors :
> tar: amsn-0_94/lang/genlangfiles.c: Cannot hard link to
> `amsn-0_94/lang/genlangfiles.c': No such file or directory
> I checked google and saw that errors like these ones could occur when
> you use global path while taring, but I'm not, using fileName which is
> local. 

I used tarfile for the first time at the weekend and noticed one thing 
that may help.  I don't know if it is a specific solution to your 
problem, but it might be worth a try.

I noticed that if I didn't explicitly close the tarfile with tar.close() 
after I had added the files, the resultant file would sometimes not be 
written properly (even with completed execution of the whole script). 
Explicitly closing the file would make these problems go away.

I hope that helps,

R


From mirandacascade at yahoo.com  Thu Feb 17 11:14:26 2005
From: mirandacascade at yahoo.com (mirandacascade at yahoo.com)
Date: 17 Feb 2005 08:14:26 -0800
Subject: newbie question - iterating through dictionary object
Message-ID: <1108656866.128912.109800@f14g2000cwb.googlegroups.com>

I am attempting to understand the difference between two techniques
that use a for/in loop to iterate through entries in a dictionary
object.  Copy/paste of interactive window illustrates.

>>> a = {}
>>> a.update({1:'a'})
>>> a.update({2:'b'})
>>> a
{1: 'a', 2: 'b'}
>>> for x in a:
... 	print x
... 	print a[x]
...
1
a
2
b
>>> y = a.keys()
>>> for z in y:
... 	print z
... 	print a[z]
...
1
a
2
b

The techniques appear to return the same results.  In the first
example, for each loop iteration, x appears to have the value of the
key of the dictionary object.  In the second example, z appears to have
the value of the key in the dictionary object.  Assuming that I want to
iterate through each dictionary entry, and I don't care about the order
in which the code iterates (i.e. I don't need to sort the list that
gets returned to y when it is assigned the value of the expression
a.keys()), my questions are:

1) Is there any advantage to use the

y = a.keys()
for z in y:

looping technique rather than the

for x in a:

looping technique?

2) What are the tradeoffs for using each of the techniques?



From lith.usenet at gmail.com  Fri Feb 18 03:17:01 2005
From: lith.usenet at gmail.com (Lith)
Date: 18 Feb 2005 00:17:01 -0800
Subject: Hello File.py
Message-ID: <1108714621.002948.226480@c13g2000cwb.googlegroups.com>


Here's a simple script, where I want to use a GUI to select a file.
(And eventually do something interesting with it.) Some problems
appear.

(1) Why does it call MenuOpen automatically?

(2) Why won't it open when I choose the menu item?

(3) Python Cookbook gave me the sys.exit call, if I run it from IDLE it
gives me a traceback. Should I be using something else?

(4) Does tkFileDialog have any useful official documentation? The main
google results for it don't even give the possible parameters for the
function calls, or sample code showing how to use.

(5) Is the 'parent = parent,' line just plain wrong?

Feel free to note any horrors you see.


..........................

import sys
from Tkinter import *
import tkFileDialog

def MenuOpen(parent):
    tkFileDialog.askopenfilename(
        defaultextension    = '.ctb',
        filetypes           = [
            ('AutoCAD Color-Dependent Style Table Files', '*.ctb'),
            ('AutoCAD Named Style Table Files', '*.stb'),
            ('All Files', '*.*')
                              ],
        initialdir          = '\\\\Desktop',
        initialfile         = '',
        parent              = parent,
        title               = 'Open Plot Style File...'
    )


def DoInterface():
    root        = Tk()

    menubar     = Menu(root)
    root.config(menu = menubar)

    menuFile    = Menu(menubar)
    menuFile.add_command(   label='Open',
command=MenuOpen(parent=root))
    menuFile.add_separator()
    menuFile.add_command(   label='Exit', command=sys.exit)

    menubar.add_cascade(    label='File', menu=menuFile);

    root.mainloop()

#----------------------------------------------------------------

DoInterface()



From andiwinkler2004 at yahoo.de  Mon Feb 28 17:00:50 2005
From: andiwinkler2004 at yahoo.de (Andreas Winkler)
Date: Mon, 28 Feb 2005 23:00:50 +0100 (CET)
Subject: Calling external text-files (newb)
Message-ID: <20050228220050.69027.qmail@web26002.mail.ukl.yahoo.com>

Hi
I tried to have python call an external 'Word'-file,
and the read the whole text into a single string with
the following code:
[CODE]
source = raw_input('file path')

File = open('source', 'r')
S = input.read()

print S
[/CODE]

But when I try to run it, it raises the following
error:

File = open('sorce', 'r')
IOError: [Errno 2] No such file or directory: 'sorce'

Is it something I am mimssing, or does python require
a special form of path?

Thanks in advance
Fred\\


	

	
		
___________________________________________________________ 
Gesendet von Yahoo! Mail - Jetzt mit 250MB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de


From chris.cavalaria at free.fr  Thu Feb 17 15:29:28 2005
From: chris.cavalaria at free.fr (Christophe Cavalaria)
Date: Thu, 17 Feb 2005 21:29:28 +0100
Subject: Why doesn't join() call str() on its arguments?
References: <mailman.2728.1108595128.22381.python-list@python.org>
Message-ID: <4214fea9$0$20394$636a15ce@news.free.fr>

Delaney, Timothy C (Timothy) wrote:

> John Roth wrote:
> 
>> result = "".join([str(x) for x in list])
> 
> As of 2.4, you should use a generator expression here instead (unless
> you require backwards-compatibility with 2.3).
> 
>     result = ''.join(str(x) for x in iterable)
> 
> Easier to read, more memory-efficient, potentially faster (depending on
> performance characteristics of building large lists).
> 
> Tim Delaney

Correct me if I'm wrong, but with a real generator expression, join can't
know in advance the final size of the resulting string. So, for big
strings, the fact that you know in advance the size of the list and of the
resulting string could lead to much better performance, even if the memory
usage is twice the one of the generator expression.


From ivoras at _-_fer.hr  Mon Feb 14 17:01:18 2005
From: ivoras at _-_fer.hr (Ivan Voras)
Date: Mon, 14 Feb 2005 23:01:18 +0100
Subject: 64 bit Python
In-Reply-To: <pjh7e2-8a8.ln1@valpo.de>
References: <1cd7e2-qu7.ln1@valpo.de> <cur339$c5q$1@bagan.srce.hr>
	<pjh7e2-8a8.ln1@valpo.de>
Message-ID: <cur73c$2sa$1@bagan.srce.hr>

Mathias Waack wrote:

> As I stated I wrote a simple C-program before. The c-program was able
> to allocate a bit more than 900MB in 32 bit mode. 

Sorry, I should've paid more attention :)


From deetsNOSPAM at web.de  Tue Feb  8 08:08:41 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Tue, 08 Feb 2005 14:08:41 +0100
Subject: Synchronizing methods of a class
References: <1107806222.385926.235060@o13g2000cwo.googlegroups.com>
Message-ID: <36rro1F53fbvrU1@individual.net>

> My Question:
> 
> If I decorate these function references in __class__.__dict__, am I
> doing it only for my specific instance of that class or the base class
> as well?

A class is a class - so yes, all instances are affected. You might want to
think about metaclasses for decorating.
-- 
Regards,

Diez B. Roggisch


From mwm at mired.org  Mon Feb 21 00:01:26 2005
From: mwm at mired.org (Mike Meyer)
Date: Sun, 20 Feb 2005 23:01:26 -0600
Subject: lambda closure question
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
	<1108808502.699333.66520@g14g2000cwa.googlegroups.com>
	<mailman.2831.1108814832.22381.python-list@python.org>
	<1108903184.145726.223480@l41g2000cwc.googlegroups.com>
Message-ID: <86k6p2h5g9.fsf@guru.mired.org>

"Carl Banks" <invalidemail at aerojockey.com> writes:

> Say you have a suite of functions, all of which are called by some main
> function and each other, and all of which need to access a lot of the
> same data.  The best, most straightforward way to do it is to have the
> common data be a local variable of the main function, and nest the
> suite inside it.  The other way to do it, passing around a common data
> structure, add complexity and hurts performance.

The third way to do it is to make the thing a class. Make all the
functions methods of the class, and all the data instance
variables. You may well want to make the main function the __call__
method of the class. In an OO environment, this may be a better, more
straightforward way than nesting fnctions.

See <URL:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52549 > for an
example of this.

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From dontwant at spam.com  Wed Feb  9 18:52:55 2005
From: dontwant at spam.com (Courageous)
Date: Wed, 09 Feb 2005 15:52:55 -0800
Subject: Is Python as capable as Perl for sysadmin work?
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
	<cu9k87$d80$1@panix2.panix.com>
	<110hqc5gu943d89@corp.supernews.com>
Message-ID: <cf8l01dl6911psj00hm5jnmo9jejul2kme@4ax.com>


>>  Well, that's where Python helps you out compared to
>> Perl.  Python can be a bit clumsier than Perl for dirt-simple tasks, but
>> you'll find that Python scales much better than Perl.

My opinion:

If "scales" refers to the /manageability/ of the code produced,
I'd say that Python scales better than C++. I would /much/ rather
manage a million lines of Python than a million lines of C++.

*checks self to see if self is wearing rose colored glasses*

*doesn't think so*

C//



From bpeng at rice.edu  Sun Feb  6 01:58:02 2005
From: bpeng at rice.edu (Bo Peng)
Date: Sun, 06 Feb 2005 00:58:02 -0600
Subject: changing local namespace of a function
In-Reply-To: <42057a48$1_2@newspeer2.tds.net>
References: <cu0lru$8ik$1@joe.rice.edu>
	<cu0sj5$sfk$1@sea.gmane.org>	<4204400C.5060608@iinet.net.au>
	<mailman.1948.1107575575.22381.python-list@python.org>
	<cu1l9o$3oq$1@joe.rice.edu> <cu3d3j$h09$1@joe.rice.edu>
	<42057a48$1_2@newspeer2.tds.net>
Message-ID: <cu4f5r$bu0$1@joe.rice.edu>

Kent Johnson wrote:
> Bo Peng wrote:
> 
>>> Exec is slow since compiling the string and calls to globals() use a 
>>> lot of time.  The last one is most elegant but __getattr__ and 
>>> __setattr__ are costly. The 'evil hack' solution is good since 
>>> accessing x and y takes no additional time.
>>
>>
>>
>> Previous comparison was not completely fair since I could pre-compile 
>> fun2 and I used indirect __setattr__. Here is the new one:
>>  >>> # solution two: use exec
>> ... def makeFunction(funcStr, name):
>> ...   code = compile(funcStr, name, 'exec')
>> ...   def f(d):
>> ...     exec code in d
>> ...   return f
>> ...
>>  >>> def fun2(d):
>> ...   myfun = makeFunction('z = x + y', 'myfun')
>> ...   for i in xrange(0,N):
>> ...     myfun(d)
>> ...   del d['__builtins__']
> 
> 
> You are still including the compile overhead in fun2. If you want to see 
> how fast the compiled code is you should take the definition of myfun 
> out of fun2:
> 
> myfun = makeFunction('z = x + y', 'myfun')
> def fun2(d):
>   for i in xrange(0,N):
>     myfun(d)
>   del d['__builtins__']
> 
> Kent

I assumed that most of the time will be spent on N times execution of 
myfunc.

 >>> myfun = makeFunction('z = x + y', 'myfun')
 >>> def fun2(d):
...   # myfun = makeFunction('z = x + y', 'myfun')
...   for i in xrange(0,N):
...     myfun(d)
...   del d['__builtins__']
 >>> def fun21(d):
...   myfun = makeFunction('z = x + y', 'myfun')
...   for i in xrange(0,N):
...     myfun(d)
...   del d['__builtins__']

 >>> profile.run('fun2(a)')
          200003 function calls in 1.930 CPU seconds

    Ordered by: standard name

    ncalls  tottime  percall  cumtime  percall filename:lineno(function)
         1    0.000    0.000    1.930    1.930 <string>:1(?)
    100000    0.460    0.000    0.460    0.000 myfun:1(?)
         1    0.000    0.000    1.930    1.930 profile:0(fun2(a))
         0    0.000             0.000          profile:0(profiler)
    100000    0.980    0.000    1.440    0.000 python-162616Io.py:4(f)
         1    0.490    0.490    1.930    1.930 python-16261Ud0.py:1(fun2)

 >>> profile.run('fun21(a)')
          200004 function calls in 1.920 CPU seconds

    Ordered by: standard name

    ncalls  tottime  percall  cumtime  percall filename:lineno(function)
         1    0.000    0.000    1.920    1.920 <string>:1(?)
    100000    0.390    0.000    0.390    0.000 myfun:1(?)
         1    0.000    0.000    1.920    1.920 profile:0(fun21(a))
         0    0.000             0.000          profile:0(profiler)
         1    0.000    0.000    0.000    0.000 
python-162616Io.py:2(makeFunction)
    100000    0.930    0.000    1.320    0.000 python-162616Io.py:4(f)
         1    0.600    0.600    1.920    1.920 python-16261huu.py:1(fun21)


From jeff at ccvcorp.com  Tue Feb 15 18:51:12 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Tue, 15 Feb 2005 15:51:12 -0800
Subject: Variables.
In-Reply-To: <42128842$0$15796$636a15ce@news.free.fr>
References: <614c778e.0502150429.1a2a4d8d@posting.google.com>
	<4211f87e$0$16331$636a15ce@news.free.fr>
	<1114m2urmov6ec7@corp.supernews.com>
	<42128842$0$15796$636a15ce@news.free.fr>
Message-ID: <11152l981q8oq59@corp.supernews.com>

Bruno Desthuilliers wrote:

> Jeff Shannon a ?crit :
> 
>> If running a console app from Explorer, the console will close as soon 
>> as the app terminates.  Using raw_input() at the end of the app means 
>> that it won't close until the user hits Enter.
> 
> So why dont you just open the console before running the app, then ?-)

Well, *I* generally do. ;)  But for those with relatively little 
computing experience that *hasn't* been through the Windows GUI, the 
thought of opening a console isn't necessarily an obvious one. 
(Modern versions of Windows seem to try to hide the console as much as 
they can....)

Jeff Shannon
Technician/Programmer
Credit International



From aleaxit at yahoo.com  Tue Feb  1 05:29:16 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Tue, 1 Feb 2005 11:29:16 +0100
Subject: how do i create such a thing?
References: <ctjl2u$2sc$1@mughi.cs.ubc.ca>
	<mailman.1605.1107124128.22381.python-list@python.org>
	<7vGdnTsopcKl-GDcRVn-rw@comcast.com>
	<1gr9b2q.1dlgnok1ayt2zsN%aleaxit@yahoo.com>
	<ctne9j$9jm$1@mughi.cs.ubc.ca>
Message-ID: <1graydy.kqcv8z136el9pN%aleaxit@yahoo.com>

Lowell Kirsh <lkirsh at cs.ubc.ca> wrote:

> What might these exceptions be?
> 
> > It's HIGHLY advisable to have your __getattr__ methods raise
> > AttributeError for any requested name that starts and ends with double
> > underscores, possibly with some specific and specifically designed
> > exceptions.

For example, delegation of such requests to some other object:
    def __getattr__(self, name):
        return getattr(self._delegate, name)

In such cases you may decide you do not need to block __specials__,
because you're OK with having self._delegate supply them or be
responsible to raise AttributeError if necessary.


Alex


From mefjr75 at hotmail.com  Sat Feb  5 02:25:45 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 4 Feb 2005 23:25:45 -0800
Subject: changing local namespace of a function
References: <cu0lru$8ik$1@joe.rice.edu>
	<1107550212.114358.281200@z14g2000cwz.googlegroups.com>
	<cu13vi$ji7$1@joe.rice.edu>
	<1107582027.700961.156800@f14g2000cwb.googlegroups.com>
	<cu1n1t$507$1@joe.rice.edu>
Message-ID: <1107588345.477870.98950@l41g2000cwc.googlegroups.com>

>It is ugly, unreadable and error prone. If I have to use this code, I
>would write
>   _z = func(_x + _y + _whatever['as'] + _a[0])
>and use a perl script to generate the real code. (See, I am not lazy
:-)
Ok laziness is an acceptable answer ;)
This is starting to make sense , you've been reading Perl's 'dense'
code and are not used to Python's explicitness.
 *Explicit is better than implicit!*
It is a Zen of Python. Also I notice you say you will probably use the
'evil hack'.
Uhmmm, it is labeled evil hack for a reason! So go ahead and make life
hard and save a few keystrokes. There is a reason for the verbosity of
Python.
I really don't completly follow what you are trying to construct here
but it seems like you need to create an adapter class of some sort and
use that ( much like Jeff Shannon or Michael Spencer mentioned )
As a general rule class abstraction is your friend in Python.
It looks like ultimatly you are just using dictionary's and want to do
inplace operations on some of the data and store the results in other
parts of the dictionary... If that is the case then why not creat a few
helper functions that do exactly one thing each and use them as your
interface.

Py> def fun_helper(d):
...   d['z'] = func(d['x']+d['y']+d['whatever']['as']+d[a][0])
...   return d

and use them as needed.

M.E.Farmer



From nick at craig-wood.com  Thu Feb 10 05:30:01 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 10 Feb 2005 10:30:01 GMT
Subject: convert list of tuples into several lists
References: <cud40u$vqb$01$1@news.t-online.com>
	<36uihlF58p63iU1@individual.net>
	<1107998078.610891.111510@z14g2000cwz.googlegroups.com>
Message-ID: <slrnd0mdhn.kvs.nick@irishsea.home.craig-wood.com>

Cappy2112 <cappy2112 at gmail.com> wrote:
>  What does the leading * do?

It causes the list/tuple following the * to be unpacked into function
arguments. Eg

>>> zip(*[(1, 2, 3), (4, 5, 6)])
[(1, 4), (2, 5), (3, 6)]

is the same as

>>> zip((1, 2, 3), (4, 5, 6))
[(1, 4), (2, 5), (3, 6)]

The * should make you think of dereferencing things (eg pointer
de-reference in C).

Its equivalent to the now deprecated apply function which does the
same thing in a more wordy fashion, ie apply the list as parameters to
the function.

>>> apply(zip, [(1, 2, 3), (4, 5, 6)])
[(1, 4), (2, 5), (3, 6)]

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


From snacktime at gmail.com  Thu Feb  3 18:14:34 2005
From: snacktime at gmail.com (snacktime)
Date: Thu, 3 Feb 2005 15:14:34 -0800
Subject: bytecode obfuscation
In-Reply-To: <1d6cdae3050203142816be07df@mail.gmail.com>
References: <1f060c4c05020313268582f6d@mail.gmail.com>
	<1d6cdae3050203142816be07df@mail.gmail.com>
Message-ID: <1f060c4c05020315146697ad0b@mail.gmail.com>

On Thu, 3 Feb 2005 17:28:50 -0500, Daniel Bickett <dbickett at gmail.com> wrote:
> snacktime wrote:
> > How difficult is it to turn python bytecode into it's original source?
> >  Is it that much different than java (this is what they will probably
> > compare it to) ?
> 
> As far as I know, that depends on how much money you're willing to
> pour into it ;)
> 
> http://www.crazy-compilers.com/decompyle/
> 
> Other than that link, which I stumbled upon at some point (at
> python-eggs), I'm decidedly uninformed on this subject.

I just stumbled on Pyrex which seems to be exactly what I needed.


From Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org  Sat Feb  5 05:31:37 2005
From: Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org (Alexander)
Date: Sat, 05 Feb 2005 13:31:37 +0300
Subject: variable declaration
References: <ctkp0b$ktu$00$1@news.t-online.com>
Message-ID: <MSGID_2=3A5025=2F3.131_4204cc14@fidonet.org>

?????? Peter!

31 ?????? 2005 ? 09:09, Peter Otten ? ????? ?????? ? All ?????:
 PO> pychecker may help you find misspelled variable names. You have to
 PO> move the code into a function, though:

 PO> $ cat epsilon.py
...skipped...
 PO> $ pychecker epsilon.py
 PO> epsilon.py:6: Local variable (epselon) not used

Well, I can change it a little to pass this check. Just add "print epselon"
line.

I think if as soon as I will make such error, I will write special checker. It
will take code like this:

def loop():
    #var S,epsilon
    epsilon=0
    S=0
    while epsilon<10:
        S=S+epsilon
        epselon=epsilon+1
        print S

Such checker will say "error:epselon is not declared!" if I will use something
not declared. If everything is ok, it will call pychecker. Simple and tasty,
isn't it?
Of cource, it may be difficult to handle fields of classes:
MyClass.epsElon=MyClass.epsilon+1
but it is solvable, I think. What do you think, is it a good idea?


Alexander, zatv at bk.ru


From fredrik at pythonware.com  Mon Feb 21 06:00:46 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 21 Feb 2005 12:00:46 +0100
Subject: unicode encoding usablilty problem
References: <opsmekm2ei6yt6e7@news.cisco.com><mailman.2811.1108751132.22381.python-list@python.org><opsmepfmcx6yt6e7@news.cisco.com><mailman.2839.1108835032.22381.python-list@python.org>
	<opsmi8a3z66yt6e7@news.cisco.com>
Message-ID: <cvceps$t8h$1@sea.gmane.org>

"aurora" <aurora00 at gmail.com> wrote:

>> if you don't know what a and b comes from, how can you be sure that
>> your program works at all?  how can you be sure they're both strings?
>
> a and b are both string.

how do you know that?

>> if you have unit tests, why don't they include Unicode tests?
>
> How do I structure the test cases to guarantee coverage? It is not  practical to test every 
> combinations of unicode/8-bit strings. Adding  non-ascii characters to test data probably make 
> problem pop up earlier. But it is arduous

sounds like you don't want to test for it.  sorry, cannot help.  I prefer
to design libraries so they can be tested, and design tests so they test all
important aspects of my libraries.  if you prefer another approach, there's
not much I can do, other than repeating what I said at the start: if you do
things the right way (decode on the way in, encode on the way out), it
just works.

</F> 





From dave at pythonapocrypha.com  Fri Feb 25 22:42:00 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Fri, 25 Feb 2005 20:42:00 -0700
Subject: Dealing with config files what's the options
In-Reply-To: <b54d04890502251854320996db@mail.gmail.com>
References: <mailman.2952.1109122710.22381.python-list@python.org>	<slrnd1v6rp.nhu.jgrahn-nntq@frailea.sa.invalid>	<421FA05C.4020700@pythonapocrypha.com>
	<b54d04890502251854320996db@mail.gmail.com>
Message-ID: <421FF008.8030704@pythonapocrypha.com>

Tom Willis wrote:
> On Fri, 25 Feb 2005 15:02:04 -0700, Dave Brueck
>>>How about writing them in Python?
>>
>>Depending on who will be editing the config files, this can be a great approach.
[snip]
> I actually thought of this, and I was kind of on the fence due to the
> intended audience.
> 
> I don't think it's too much to ask that they are comfy with the
> concept of variables. I mean, if it was a shell script they'd be at
> the top of the file anyway.
> 
> Then again I'm some what hesitant to help them make the connection
> that I'm giving them the ability to indirectly edit the code. Kind of
> like opening pandoras box. Once the figure out they can open any file
> (*.py) with notepad, there will be utter anarchy and I'll get the call
> at 4am that somethings wrong with the production data.

If you're giving them an executable (i.e. py2exe'd), then you can just exclude 
config.py from the exe.

Either way, if you're not so worried about malicious breakage but ignorant 
breakage, then you could always name your config file something like 
'options.cfg' and then:

import new, sys

# Do this at app startup
sys.modules['config'] = new.module('config')
exec file('options.cfg').read() in config.__dict__

# All other modules do this
import config
conn = config.maxConnections
... etc ...

-Dave


From aleaxit at yahoo.com  Tue Feb  8 12:34:10 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Tue, 8 Feb 2005 18:34:10 +0100
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4207fd24@fidonet.org>
	<UmSNd.104914$Jk5.59261@lakeread01>
	<4208178F.40804@po-box.mcgill.ca>
	<mailman.2137.1107832669.22381.python-list@python.org>
	<1grnpna.dwvqwdn50ot0N%aleaxit@yahoo.com>
	<1107882860.783420.251410@c13g2000cwb.googlegroups.com>
Message-ID: <1grognr.ll807511c4wlkN%aleaxit@yahoo.com>

top <alexandre.tp at gmail.com> wrote:

> Alex Martelli wrote:
> [snip]
> > I disagree: compile time is when the compiler is running (for
> example,
> > the compiler is the component which diagnoses syntax errors, while
> other
> > errors are diagnosed ``at runtime'').
> [snip]
> 
> That thing about syntax errors is news to me. I thought they were
> caught at runtime, since you can catch them as exceptions, as in:
> 
> try: prijnt projnt
> except SyntaxError: print "See, it gets caught"

Nope:

kallisti:~/cb alex$ cat a.py
try: prijnt projnt
except SyntaxError: print "See, it gets caught"

kallisti:~/cb alex$ python a.py 
  File "a.py", line 1
    try: prijnt projnt
                     ^
SyntaxError: invalid syntax
kallisti:~/cb alex$ 

> If this happens at compile-time, I'd like to know how.

You can catch SyntaxError when it happens (e.g) on an explicit call to
the built-in function ``compile'', or, say:

>>> try: import a
... except SyntaxError: print "caught!"
... 
caught!

Here, the compilation of a.py (which has the error, see the cat above)
happens AFTER the try/except itself has been compiled, and while the try
clause is executing (compiling happens as part of import of a .py unless
the .pyc file is already there & updated); so the exception handler can
of course catch the exception.


Alex


From http  Fri Feb  4 22:24:29 2005
From: http (Paul Rubin)
Date: 04 Feb 2005 19:24:29 -0800
Subject: how to send an int over a socket
References: <200502041827.45302.brown@esteem.com>
	<mailman.1943.1107572097.22381.python-list@python.org>
Message-ID: <7xhdkrpu36.fsf@ruckus.brouhaha.com>

Tom Brown <brown at esteem.com> writes:
> Ok, I think I've found what I was looking for. The marshal.dumps()
> function will convert my integer into a string representation of a
> fixed size. This way, on the other side, I know how many bytes to
> read to get the size of the string.

Think hard about whether that's really what you want.  marshal.dumps
is not guaranteed to result in a fixed sized string.  It's not even
guaranteed to use the same format between (say) Python 2.4 and Python
2.5.  So if the two ends of your network connection aren't running the
same version of Python, they might get differing numbers.  Marshal
really isn't what you want for that.

Why don't you look at the struct module instead.  You could also look
the xdr or xmlrpc libraries, which may be closer to what you want.


From fredrik at pythonware.com  Mon Feb 14 19:09:52 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 15 Feb 2005 01:09:52 +0100
Subject: is there a safe marshaler?
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl><1108051828.483222.62670@z14g2000cwz.googlegroups.com><7xmzu6q4cv.fsf@ruckus.brouhaha.com><4211185b$0$28982$e4fe514c@news.xs4all.nl><7xbramzt1c.fsf@ruckus.brouhaha.com><42112b1e$0$28978$e4fe514c@news.xs4all.nl><7xacq6sqej.fsf@ruckus.brouhaha.com><421130ae$0$28984$e4fe514c@news.xs4all.nl><7x3bvyiuin.fsf@ruckus.brouhaha.com>
	<42113b3b$0$28991$e4fe514c@news.xs4all.nl>
Message-ID: <curefd$nop$1@sea.gmane.org>

Irmen de Jong wrote:

>> I haven't looked at that bug carefully yet but yes, anything exposed
>> to the internet has to be done very carefully, and XML-RPC missed
>> something.
>
> What I know of it is that you had the possibility to arbitrarily follow
> attribute paths, including attributes that should rather be kept hidden.

the bug had nothing to do with the XML-RPC protocol itself; it was a
weakness in the SimpleXMLRPCServer framework which used reflection
to automatically publish instance methods (if you use getattr repeatedly on
an instance, you can access a lot more than just attributes and methods...)

how do you publish "RPC endpoints" in Pyro?

</F> 





From philippe at philippecmartin.com  Sat Feb 19 13:18:20 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Sat, 19 Feb 2005 18:18:20 GMT
Subject: could that be a mutable object issue ?
References: <1108835898.7186.3.camel@pcmsc>
	<mailman.2841.1108836796.22381.python-list@python.org>
Message-ID: <pan.2005.02.19.18.18.19.324614@philippecmartin.com>

Yes, and that is my initial problem: I seem to write correctly that
'pickle string' to a device, by when I read it back, the appended
information is gone.


On Sat, 19 Feb 2005 19:13:58 +0100, Fredrik Lundh wrote:

> Philippe C. Martin wrote:
> 
>> print 'LEN OF BOOK BEFORE APPEND: ', len(pickle.dumps(self.__m_rw))
>> self.__m_rw.books.append( [p_col1,p_col2,p_col3] )
>> print 'LEN OF BOOK AFTER APPEND: ', len(pickle.dumps(self.__m_rw))
>>
>> I get the same length before and after append.
>>
>> when I print self.__m_rw.books, I see my 'appends' in there, yet the
>> pickled object does not change.
> 
> instead of checking the length, have you checked what
> 
>     pickle.loads(pickle.dumps(self.__m_rw))
> 
> returns?
> 
> </F>



From mahs at telcopartners.com  Fri Feb  4 12:01:05 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 04 Feb 2005 09:01:05 -0800
Subject: Popularizing SimpleHTTPServer and CGIHTTPServer
In-Reply-To: <Q%xMd.3495$4D3.3076@news02.roc.ny>
References: <1107412654.121488.157070@c13g2000cwb.googlegroups.com>	<Xns95F25F64B1D31devnulljoreybumpcom@199.45.49.11>
	<Q%xMd.3495$4D3.3076@news02.roc.ny>
Message-ID: <cu09ip$cib$1@sea.gmane.org>

Jorey Bump wrote:
 > ... Is there a NotSoSimpleHTTPServer? ...

Steve Holden wrote:
 > ... You want ExtremelyBloodyComplicatedHTTPServer  :-)

Lee Harr wrote:
> ... I think I would point to twisted for that.


Michael :-)





From maxm at mxm.dk  Wed Feb  9 02:16:56 2005
From: maxm at mxm.dk (Max M)
Date: Wed, 09 Feb 2005 08:16:56 +0100
Subject: Is Python as capable as Perl for sysadmin work?
In-Reply-To: <mailman.2204.1107885796.22381.python-list@python.org>
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
	<mailman.2204.1107885796.22381.python-list@python.org>
Message-ID: <4209b8a4$0$223$edfadb0f@dread12.news.tele.dk>

Jeff Epler wrote:
> No.
> 
> Unlike Perl, Python implements only a *finite turning machine* model of
> computation.  An easy way to see this limitation is in the following
> code:
>     >>> 1.0 / 10.0
>     0.10000000000000001
> In an infinite Turning machine, there would be an unbounded number of
> zeros before the second 1, giving the exact result, not a numeric
> approximation.

Another thing is that in Perl it turns left, while in Python it turns 
right. hence the .rfind() string method.


> Well, if you ever
> have to threaten Python, just keep in mind that '... or die' just plain
> won't work.  You have to suggest that it 'try ... except', which is
> really offensive.  If I want to beg my computer to run programs, I know
> where to find Intercal with its "PLEASE" and "DO PLEASE" constructions.

Wasn't there talk about a "try harder" recently?

try:
     statement
tryharder:
     statement


-- 

hilsen/regards Max M, Denmark

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


From eee at nmt.edu  Wed Feb  9 16:41:58 2005
From: eee at nmt.edu (Earl Eiland)
Date: Wed, 09 Feb 2005 14:41:58 -0700
Subject: Can't get pcap file scanner to terminate normally
Message-ID: <1107985316.2416.79.camel@dulcevida>

I'm using pcapy to scan a packet capture file.  I've tried a variety of
tests to end the loop at EOF, but can't seem to avoid the program
terminating with a pcapy.PcapError.  I've tested for empty lists (while
Raw == [] or Passed == []:) and strings (while Raw ==""] or Passed ==
"":) as well as the test in the sample below.

while Raw and Passed :
	if Raw_IP != Passed_IP:
		Dropped.dump(Raw_hdr, Raw_data)
	else:
		Passed_hdr, Passed_data = Passed.next()
	Raw_hdr, Raw_data = Raw.next()




From pythonista at gmail.com  Wed Feb  9 13:22:34 2005
From: pythonista at gmail.com (Sean Blakey)
Date: Wed, 9 Feb 2005 10:22:34 -0800
Subject: python code with indention
In-Reply-To: <1107972416.931714.256210@l41g2000cwc.googlegroups.com>
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
	<110hq18fbebn0b1@news.supernews.com>
	<1107972416.931714.256210@l41g2000cwc.googlegroups.com>
Message-ID: <372a76240502091022d270693@mail.gmail.com>

On Wed, 09 Feb 2005 10:10:29 -0800 (PST), Xah Lee <xah at xahlee.org> wrote:
> i thought it is trivial for the Python parser to spit out a version
> with matching brackets. Similarly, perhaps some opensourcing student
> has modified a parser to read in a matching brackets delimited version
> of Python.
> 
>  Xah
>  xah at xahlee.org
>  http://xahlee.org/PageTwo_dir/more.html
> 

Well, there's always the pindent.py script. Get the python source, and
look at Tools/scripts/pindent.py

This isn't an alternate parser, but it can turn a python script with
end-block comments and no indentation into a correctly indented python
script.

-- 
Sean Blakey
Saint of Mild Amusement, Evil Genius, Big Geek
Python/Java/C++/C(Unix/Windows/Palm/Web) developer
quine = ['print "quine =",quine,"; exec(quine[0])"'] ; exec(quine[0])


From klachemin at comcast.net  Thu Feb 24 01:06:54 2005
From: klachemin at comcast.net (Kamilche)
Date: 23 Feb 2005 22:06:54 -0800
Subject: Shift Confusion
Message-ID: <1109225214.430739.259600@l41g2000cwc.googlegroups.com>

I'm trying to pack two characters into a single byte, and the shifting
in Python has me confused.

Essentially, it should be possible to use a 'packed string' format in
Python, where as long as the characters you're sending are in the ASCII
range 0 to 127, two will fit in a byte.

Here's the code. Can you tell what I'm doing wrong?

|import types
|
|def PackString(s):
|    if type(s) != types.StringType:
|        raise Exception("This routine only packs strings!")
|    l = len(s)
|    if l % 2 != 0:
|        s = s + '\0'
|        l += 1
|    chars = []
|    for i in range(0, l, 2):
|        x = ord(s[i])
|        y = ord(s[i+1])
|        chars.append(chr((y << 1) | x))
|    return ''.join(chars)
|
|def UnpackString(s):
|    if type(s) != types.StringType:
|        raise Exception("This routine only unpacks strings!")
|    l = len(s)
|    chars = []
|    for i in range(l):
|        temp = ord(s[i])
|        c = 0xf0 & temp
|        chars.append(chr(c))
|        c = 0x0f & temp
|        chars.append(chr(c))
|    return ''.join(chars)
|
|
|def main():
|    s = "Test string"
|    print s
|    packed = PackString(s)
|    print "This is the string packed:"
|    print packed
|    print "This is the string unpacked:"
|    print UnpackString(packed)
|
|main()



From harlinseritt at yahoo.com  Wed Feb  9 03:33:26 2005
From: harlinseritt at yahoo.com (Harlin)
Date: 9 Feb 2005 00:33:26 -0800
Subject: Success using Python .NET with py2exe?
Message-ID: <1107938006.074283.159590@c13g2000cwb.googlegroups.com>

Has anyone had any success using py2exe with anything you've written
using the Python .NET implementation? (This is the one from the Zope
website -- not ActiveState). I seem to be having trouble with py2exe
and anything I've written using the CLR modules. Has anyone encountered
this?

Thanks,

Harlin



From invalidemail at aerojockey.com  Wed Feb 23 14:53:14 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 23 Feb 2005 11:53:14 -0800
Subject: assert 0, "foo" vs. assert(0, "foo")
In-Reply-To: <pan.2005.02.23.09.57.43.578480@thomas-guettler.de>
References: <pan.2005.02.23.09.57.43.578480@thomas-guettler.de>
Message-ID: <1109188394.371571.238340@z14g2000cwz.googlegroups.com>


Thomas Guettler wrote:
> Is it possible to change future python versions, that
> assert accept parenthesis?


It's possible, but extremely unlikely that it will ever happen.  assert
is not a function, but a statement (like print).  Statements don't use
parentheses; when you use parentheses, it considers that a tuple.

For example, if you try this with print:

print ("hello","world")

you see that in prints out a tuple value, rather than treating "hello"
and "world" as arguments.  Same thing with assert.


-- 
CARL BANKS



From sjmachin at lexicon.net  Tue Feb 22 16:21:59 2005
From: sjmachin at lexicon.net (John Machin)
Date: 22 Feb 2005 13:21:59 -0800
Subject: Problem with the sort() function
In-Reply-To: <7204a5f80386fadd1afa4bc2509be849@localhost.talkaboutprogramming.com>
References: <64827323f7134aea810788b3ec6cf516@localhost.talkaboutprogramming.com>
	<mailman.2928.1109066131.22381.python-list@python.org>
	<7204a5f80386fadd1afa4bc2509be849@localhost.talkaboutprogramming.com>
Message-ID: <1109107319.225838.36000@o13g2000cwo.googlegroups.com>


clementine wrote:
> Thanx Nick...I forgot to mention im using python 2.2 and along with a
host
> of other things it doesnt seem to have the enumarate built in
function
> :(:(:(...is it possible to replace it by something else? I dont think
> simulating it will be feasible....

Faced with Nick's one line of code that uses 'enumerate', you have the
choice of building (and testing) an elaborate time machine to make a
SLOW 'enumerate' available for 2.2, or you can just patch Nick's
sorting gadget in a very straightforward manner:

modern as per Nick:
seq = [(key(elem), i, elem) for i, elem in enumerate(seq)]

ancient:
seq = [(key(seq[i]), i, seq[i]) for i in xrange(len(seq))]



From mwm at mired.org  Tue Feb 15 22:26:30 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 15 Feb 2005 21:26:30 -0600
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr> <37bkemF5a7s7vU1@individual.net>
	<cut6nh$rpk$1@usenet.otenet.gr> <86ll9piuj8.fsf@guru.mired.org>
	<cutf1h$576$1@usenet.otenet.gr> <86hdkdimfb.fsf@guru.mired.org>
	<cutoj0$g93$1@usenet.otenet.gr>
Message-ID: <868y5pi3rt.fsf@guru.mired.org>

Ilias Lazaridis <ilias at lazaridis.com> writes:

> Mike Meyer wrote:
>> Ilias Lazaridis <ilias at lazaridis.com> writes:
>>
>>>Mike Meyer wrote:
>>>
>>>>>It is an community need.
>>>>
>>>>Based on the evidence at hand, this is a false statement.
>>>
>>>It is an community need [at least partially]
>> Repeating a falsehood will not make it true.
>> Can you offer anything besides your own whining to back this claim
>> up?
>
> please review my initial posting.

Done. Now answer the question.

      <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From cdieterich at geosci.uchicago.edu  Tue Feb  1 16:17:04 2005
From: cdieterich at geosci.uchicago.edu (Christian Dieterich)
Date: Tue, 1 Feb 2005 15:17:04 -0600
Subject: variable declaration
In-Reply-To: <1grbjim.1pkh5toxl7g9dN%aleaxit@yahoo.com>
Message-ID: <9F391A4E-7496-11D9-BD1D-000A9582377C@geosci.uchicago.edu>

On D? M?irt, Feabh 1, 2005, at 12:19 America/Chicago, Alex Martelli 
wrote:

> Michael Tobis <mt at 3planes.com> wrote:
>    ...
>> I don't know that it's ever necessary to rebind, but it is, in fact,
>> common, and perhaps too easy. In numeric Python, avoiding rebinding
>> turns out to be a nontrivial skill.
>
> Well, a for-statement is BASED on rebinding, for example.  Maybe you
> don't mean to address rebinding per se, but rebinding in ``separate
> statements''?  The ``separation'' needs to be defined carefully to make
> while-loops work, too.  Normally, a while-statement's header clause
> would be something like:
>     while <expression>:
> where the expression depends on the values bound to some local
> variables.  For the first evaluation, the variables need to be bound by
> earlier statements; for the expression to eventually become false, it's
> likely (unless we're talking about mutable objects) that the variables
> need to be re-bound in the loop body.
>
> For example, consider:
>
> def f(a, b):
>     x = 0
>     while x < 100000:
>         print x,
>         x = a*x + b
>     print

I think you guys are talking about rebinding of quite different 
objects. Rebinding x in the above example is not what Michael Tobis is 
talking about, I presume, though x is prone to the 'epselon' error. 
But, C'est la vie.

If x was some sort of counter (time step, iteration) and there was a 
Numeric array y to be processed in that loop,

def f(a, b):
   y = Numeric.zeros((100, 100), 'd')
   x = 0
   while x < 100000:
     x = a*x + b
     y = a*y + b

it is actually important (e.g. in terms of performance) not to rebind 
y. Okay, in this case it is straightforward to change function f to 
function g, so that y does not get recreated (rebound).

def g(a, b):
   y = Numeric.zeros((100, 100), 'd')
   x = 0
   while x < 100000:
     x = a*x + b
     y *= a
     y += b

I don't know if y gets 'rebound' in a strict sense of the word. But y 
does not call it's constructor (which is expensive). And in terms of 
performance
y = Numeric.zeros((100, 100), 'd')
         1    0.010    0.010  574.050  574.050 profile:0(f(1,1))
         1   -0.000   -0.000  416.640  416.640 profile:0(g(1,1))
   y = numarray.zeros((100, 100), 'd')
         1    0.020    0.020  231.359  231.359 profile:0(f(1,1))
         1    0.010    0.010   27.899   27.899 profile:0(g(1,1))
it's quite a difference.

> would you require the programmer to find out a closed-form expression
> for this recurrence relation, in order to avoid having to rebind the
> name 'x'?  OK, in this particular case it may be OK, if you are willing

Using Numeric arrays or Numarrays, it might help to have some 
closed-form expression for the above (I'm quite sure there is, see 
daxpy in BLAS). But then, I'd say it's in the responsability of the 
programmer who did class Y to create y to prevent the user from using y 
= a*y + b. Either in the documentation or really strictly by not 
implementing + and * (only =+ and =*). This kind of 
restriction/declaration should not be in Python, but in the module that 
provides Y.

> to put competence in college-level algebra as a prerequisite for using
> Python.  But what if the rebinding in the body of the loop was to a 
> more

I believe those using Numeric/Numarray might have heard of algebra and 
in-place operations. So, one could even argue that it's up to the user 
to find an efficient way to avoid rebinding of y.

Christian



From vsapre80 at gmail.com  Fri Feb 11 18:43:43 2005
From: vsapre80 at gmail.com (vsapre80 at gmail.com)
Date: 11 Feb 2005 15:43:43 -0800
Subject: Python in EDA
Message-ID: <1108165423.522756.151000@z14g2000cwz.googlegroups.com>

Hi,

I am new to Python and coming from the EDA/VLSI Design background.

I wanted to know if there are some active projects going on EDA modules
written in Python.

Usually, use of scripting tools in VLSI Design is on a per-project
basis and rarely reaches the level of a general framework, mostly due
to extensibility and speed performance limitations. That Python
overcomes atleat one of them...may be a good reason to look at Python
based EDA.

I was interested in knowing if such efforts are on. Apart from that
also any input on EDA softwares using Python will be useful.

regards,
Vishal



From jbzsmith at lycos.com  Tue Feb  8 22:28:57 2005
From: jbzsmith at lycos.com (Jim Smith)
Date: Tue, 08 Feb 2005 20:28:57 -0700
Subject: Which IDE supports python and wxpython?
In-Reply-To: <oS8Nd.4231$bw.168035@phobos.telenet-ops.be>
References: <oS8Nd.4231$bw.168035@phobos.telenet-ops.be>
Message-ID: <MqedndCsWeFzH5TfRVn-sQ@comcast.com>

Selfimprover wrote:
> Hello all,
> 
> Is there a good IDE on the market which supports python and wxpython. Goal
> is to use it in a big distributed project.
> 
> Greetings
> 

Try wxDesigner!

http://www.roebling.de/


From mm at newsgroups.com  Mon Feb 14 18:14:21 2005
From: mm at newsgroups.com (MM)
Date: Tue, 15 Feb 2005 12:14:21 +1300
Subject: array of bits?
In-Reply-To: <mailman.2578.1108419693.22381.python-list@python.org>
References: <cur7k9$4g7$1@lust.ihug.co.nz>
	<mailman.2578.1108419693.22381.python-list@python.org>
Message-ID: <curad4$6jf$1@lust.ihug.co.nz>

Thanks people. List it is. matthew.


From fuzzyman at gmail.com  Mon Feb 28 08:48:28 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 28 Feb 2005 05:48:28 -0800
Subject: Hey, How Do I Distribute my New Completed Python Project?
In-Reply-To: <1109579904.014493.222540@o13g2000cwo.googlegroups.com>
References: <1109579904.014493.222540@o13g2000cwo.googlegroups.com>
Message-ID: <1109598508.839761.278740@f14g2000cwb.googlegroups.com>

As Swaroop mentions, there is a relatively simple standard for
distributing extension modules. For actual applications - convenience
is the only guideline :-)

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From polytechnique at gmail.com  Mon Feb 28 11:31:14 2005
From: polytechnique at gmail.com (DENG)
Date: 28 Feb 2005 08:31:14 -0800
Subject: Share your SciTEGlobal.properties pls~~~~
Message-ID: <1109608274.905138.19730@l41g2000cwc.googlegroups.com>

hi,
im new to Python, i chose SciTE as my Python editor. but the problem is
SciTE needs to be config carefully, are there anyone use SciTE too? can
you share your SciTEGlobal.properties file? black background solution
is prefered:)

thanks in advance

best regards



From mefjr75 at hotmail.com  Sun Feb  6 22:24:23 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 6 Feb 2005 19:24:23 -0800
Subject: newbie wants to compile python list of filenames in selected
	directories
In-Reply-To: <36n60uF520lfaU1@individual.net>
References: <36n60uF520lfaU1@individual.net>
Message-ID: <1107746663.376521.170050@o13g2000cwo.googlegroups.com>

anthonyberet wrote:
> Hi, I am new at Python, and very rusty at the one language I was good

> at, which was BASIC.
>
> I want to write a script to compare filenames in chosen directories,
on
> windows machines. Ideally it would compose a list of strings of all
the
> filenames in the directories, and those directories would be chosable
by
> the user of the script.
>
> I am quite happy to do my own legwork on this , I realise it is
simple
> stuff, but can anyone point me in the right direction to start?
>
> Thanks

Cool! I like your attitude ;)
Others have given you a good start with os. In case you don't know os
has a great many path manipulation methods. Always try to use them so
you can insulate yourself from cross platform path nightmares.
A few of the highlights are:

### split a path
py> parts = os.path.split(r'c:\windows\media\ding.wav')
py> print parts
('c:\\windows\\media', 'ding.wav')

### join a path and part and do it right on any platform
py> path = os.path.join('c:\\windows\\media', 'ding.wav')
'c:\\windows\\media\\ding.wav'

### get basename of the file
py> base = os.path.basename('c:\\windows\\media\\ding.wav')
py> print base
'ding.wav'

Plus many more, be sure to study the os module if you are doing any
path manipulations.

Ok and now for something sorta different( alright, I was really bored )

. def glob_dir(dir):
.     """Return a list of *.py* (.py, .pyc, .pyo, .pyw)
.        files from a given directory.
.     """
.     import glob, os
.     # Get a list of files that match *.py*
.     GLOB_PATTERN = os.path.join(dir, "*.[p][y]*")
.     pathlist = glob.glob(GLOB_PATTERN)
.     return pathlist
.
. def list_dir(dir):
.     ''' Another way to filter a dir '''
.     import os
.     pathlist = os.listdir(dir)
.     # Now filter out all but py and pyw
.     filterlist = [x for x in pathlist
.                        if x.endswith('.py')
.                        or x.endswith('.pyw')]
.    return filterlist
hth,
M.E.Farmer



From kuljo at freemail.hu  Tue Feb  1 19:49:27 2005
From: kuljo at freemail.hu (Lajos Kuljo)
Date: Wed, 02 Feb 2005 01:49:27 +0100
Subject: MySQLdb - Tuples
In-Reply-To: <4200097f$1@news.uni-ulm.de>
References: <3vTLd.19498$Of5.13133@nntpserver.swip.net>
	<4200097f$1@news.uni-ulm.de>
Message-ID: <ErVLd.19543$Of5.13128@nntpserver.swip.net>

Dennis Benzinger wrote:
> Lajos Kuljo wrote:
> 
>>Hallo,
>>ich bin voll neu im Python-Programming, deshalb ist mein Problem 
>>wahrscheinlich trivial:
>>
>>Wenn ich die Script
>>#########################################33
>>#! /usr/bin/env python
>>import MySQLdb
>>db=MySQLdb.connect(host='localhost', db='photum_0_6_2', user='root', 
>>passwd='thkhgfgd')
>>c=db.cursor()
>>c.execute('select person from persons order by person')
>>tup=c.fetchall()
>>for a in tup:
>>   print a
>>################################################
>>ausf?hre, erhalte ich Dinge wie
>>('Dieter',)
>>('Hulda',)
>>....
>>
>>Ich brauche die Klammern, Apostrphe und Kommas nicht (ich will nur die 
>>Inhalte) und kann ich sie nicht loswerden. Versucht habe ich u. a. print 
>>a[2:-3] was nur zwei Klammern bringt.
>>b=lstrip(a, "(") haut auch nicht hin.
>>Weiss jemand Rat?
> 
> 
> Hab gerade kein MySQL da, aber ?nder mal
> 
> for a in tup:
>     print a
> 
> in
> 
> for a in tup:
>     print a[0]  # Das erste Element des Tupels
> 
> 
> Dann wird statt des ganzen Tupels nur das erste Element ausgegeben.
> 
> 
> 
>>P.S. Woher kommen diese Klammern und Apostrophen, vom MySQLdb?
> 
> 
> Die Klammern und Apostrophe kommen daher, dass tup ein Tupel
> (http://docs.python.org/lib/typesseq.html) mit einem Element
> (der Person) ist.
> 
> 
> Dennis
Thank you Dennis,
it works!
Sorry for the wrong language. I'm getting older.
Kind regards Lajos


From justaskme at if.you.want.to.contact.me  Mon Feb 28 23:55:31 2005
From: justaskme at if.you.want.to.contact.me (Joe)
Date: Tue, 01 Mar 2005 05:55:31 +0100
Subject: ZoDB's capabilities
References: <d00640$1o6o$1@news.vol.cz>
Message-ID: <kct721hhsrv7eabnhu691foj7vd53ff61u@4ax.com>

On Mon, 28 Feb 2005 23:31:27 +0100, Almad <almad at include.cz> wrote:
>I'm going to write a custom CMS. I'd like to use some odbms, as code is then
>much more cleaner...

You should go ask for pratical infos on ZODB here:

http://www.zope.org/Products/StandaloneZODB

Joe.


From renelt at web.de  Sun Feb 27 11:33:21 2005
From: renelt at web.de (Alex Renelt)
Date: Sun, 27 Feb 2005 17:33:21 +0100
Subject: any Python equivalent of Math::Polynomial::Solve?
In-Reply-To: <38e9nqF5ndqt9U1@individual.net>
References: <just-420C1F.16423926022005@news1.news.xs4all.nl>
	<1109485184.587035.176540@l41g2000cwc.googlegroups.com>
	<just-5C6FB9.11103127022005@news1.news.xs4all.nl>
	<38e9nqF5ndqt9U1@individual.net>
Message-ID: <38eaemF5o7kfjU1@individual.net>

Alex Renelt wrote:

> in addition:
> I'm writing a class for polynomial manipulation. The generalization of 
> the above code is:
> 
> definitions:
> 1.) p = array([a_0, a_i, ..., a_n]) represents your polynomial
> P(x) = \sum _{i=0} ^n a_i x^i
> 
> 2.) deg(p) is its degree
> 
> 3.) monic(p) makes P monic, i.e. monic(p) = p / p[:-1]
> 
> then you get:
> from numarray import *
> import numarray.linear_algebra as la
> 
> def roots(p):
>     p = monic(p); n = deg(p)
>     M = asarray(zeros((n,n)), typecode = 'f8')
> # or 'c16' if you need complex coefficients
>     M[:-1,1:] = identity(n-1)
>     M[-1,:] = -p[:-1]
>     return la.eigenvalues(M)
> 
> Alex

uhh, I made a mistake:
under definitions, 3.)
its "monic(p) = p / p[-1]" of course

Alex


From mahs at telcopartners.com  Fri Feb  4 13:13:39 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 04 Feb 2005 10:13:39 -0800
Subject: returning True, False or None
In-Reply-To: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
Message-ID: <cu0dqq$see$1@sea.gmane.org>

Steven Bethard wrote:
> I have lists containing values that are all either True, False or None, 
> e.g.:
> 
>     [True,  None,  None,  False]
>     [None,  False, False, None ]
>     [False, True,  True,  True ]
>     etc.
> 
> For a given list:
> * If all values are None, the function should return None.
> * If at least one value is True, the function should return True.
> * Otherwise, the function should return False.
> 
> Right now, my code looks like:
> 
>     if True in lst:
>         return True
>     elif False in lst:
>         return False
>     else:
>         return None
> 
> This has a light code smell for me though -- can anyone see a simpler 
> way of writing this?
> 
> STeVe

max(lst)  ;-)

Michael




From ncoghlan at iinet.net.au  Wed Feb  2 08:01:11 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Wed, 02 Feb 2005 23:01:11 +1000
Subject: how to separate hexadecimal
In-Reply-To: <4200BA19.1010501@iinet.net.au>
References: <2cad209005020123107fb43105@mail.gmail.com>	<2cad2090050201232427cb97f2@mail.gmail.com>	<420082E4.7020605@iinet.net.au>	<mailman.1738.1107332394.22381.python-list@python.org>	<7xhdkvbca2.fsf@ruckus.brouhaha.com>
	<4200BA19.1010501@iinet.net.au>
Message-ID: <4200CF17.9040505@iinet.net.au>

Nick Coghlan wrote:
> When not working at the hardware level, just go with the definition:
> 
> Py> def complement(val, limit=256):
> ...   if val >= limit or val < 0:
> ...     raise ValueError("Value out of range for complemented format")
> ...   if val == 0:
> ...     return 0
> ...   return limit - val
> ...
> Py> hex(complement(0x55))
> '0xab'
> Py> hex(complement(0x55, 256*256))
> '0xffab'

Or there's the simplest definition:

Py> def complement(val, limit=256):
...   return (limit - val) % limit
...
Py> hex(complement(0x55))
'0xab'
Py> hex(complement(-0x55))
'0x55'
Py> hex(complement(0xab))
'0x55'
Py> hex(complement(-0xab))
'0xab'

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From jao at geophile.com  Sat Feb 26 10:34:06 2005
From: jao at geophile.com (Jack Orenstein)
Date: Sat, 26 Feb 2005 10:34:06 -0500
Subject: Threading and consuming output from processes
In-Reply-To: <donn-03556F.10244325022005@gnus01.u.washington.edu>
References: <1109278779.955986.193860@z14g2000cwz.googlegroups.com>	<1109283053.971905.27670@z14g2000cwz.googlegroups.com>	<1109295016.597170.21350@o13g2000cwo.googlegroups.com>	<YBwTd.38471$H05.20645@twister.nyroc.rr.com>	<mailman.3032.1109301798.22381.python-list@python.org>
	<donn-03556F.10244325022005@gnus01.u.washington.edu>
Message-ID: <422096EE.7080401@geophile.com>

I asked:

>> I am developing a Python program that submits a command to each node
>> of a cluster and consumes the stdout and stderr from each. I want all
>> the processes to run in parallel, so I start a thread for each
>> node. There could be a lot of output from a node, so I have a thread
>> reading each stream, for a total of three threads per node. (I could
>> probably reduce to two threads per node by having the process thread
>> handle stdout or stderr.)

Simon Wittber said:

 > In the past, I have used the select module to manage asynchronous
 > IO operations.
 >
 > I pass the select.select function a list of file-like objects, and it
 > returns a list of file-like objects which are ready for reading and
 > writing.

Donn Cave said:

> As I see another followup has already mentioned, the classic
> "pre threads" solution to multiple I/O sources is the select(2)
> function, ...

Thanks for your replies. The streams that I need to read contain
pickled data. The select call returns files that have available input,
and I can use read(file_descriptor, max) to read some of the input
data. But then how can I convert the bytes just read into a stream for
unpickling? I somehow need to take the bytes arriving for a given file
descriptor and buffer them until the unpickler has enough data to
return a complete unpickled object.

(It would be nice to do this without copying the bytes from one place
to another, but I don't even see how do solve the problem with
copying.)

Jack



From irmen.NOSPAM at xs4all.nl  Wed Feb  2 17:03:17 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Wed, 02 Feb 2005 23:03:17 +0100
Subject: Getting a module's byte code, how?
Message-ID: <42014e25$0$28975$e4fe514c@news.xs4all.nl>

What would be the best way, if any, to obtain
the bytecode for a given loaded module?

I can get the source:
import inspect
import os
src = inspect.getsource(os)

but there is no ispect.getbytecode()  ;-)

--Irmen


From albaalu at gmail.com  Mon Feb 14 21:19:51 2005
From: albaalu at gmail.com (PD)
Date: 14 Feb 2005 18:19:51 -0800
Subject: wxPython OGL future
In-Reply-To: <mailman.2602.1108430985.22381.python-list@python.org>
References: <1108428501.441786.154130@g14g2000cwa.googlegroups.com>
	<mailman.2602.1108430985.22381.python-list@python.org>
Message-ID: <1108433991.019759.83160@f14g2000cwb.googlegroups.com>

Hi Tom,

OGL is a library that is part of wxPython (wx.lib.ogl). I am trying to
put together some kind of schematic editor. It would be a block diagram
of modules and sometimes a statemachine type of figure. Similar to
something Visio does, but about a gazillion times simpler.

Thanks
Pouya



From junkmail at chipworks.net  Thu Feb 10 21:26:52 2005
From: junkmail at chipworks.net (Junkmail)
Date: 10 Feb 2005 18:26:52 -0800
Subject: Zope: Adding a layer causes valid output to become an object
	reference?
Message-ID: <1108088812.610093.95990@l41g2000cwc.googlegroups.com>

I've been playing with Zope for about a year and took the plunge last
week into making a product.

To keep it [arguably] simple I used a ZClass to wrap an external
method.  My ZClass works and returns the output I expect.

What doesn't work is when I refer to an object I've created from a
dtml-var or a tal:content or tal:replace statement.  Instead of the
proper output I receive: <TextileClass at home> where TextileClass is
my class name and home is the Object ID I'm referencing.  The fact that
the < and > surround the output make it invisible in the browser and
had me chasing ghosts for a while.  I'd bet I'm not groking something
here.

So if I call /home I get the proper HTML output: "<b>What I am looking
for</b>" but when in another object I reference <dtml-var home> I get:
"<TextileClass at home>".

Any thoughts are appreciated.

Mike

PS: Yes it is a wrapper for Textile ver 2 and I plan on publishing it.
It is however limited to Zope 2.7+ due to the implementation of Textile
requiring Python 2.3



From groleo at gmail.com  Tue Feb 22 04:12:33 2005
From: groleo at gmail.com (Groleo Marius)
Date: Tue, 22 Feb 2005 11:12:33 +0200
Subject: executea string
Message-ID: <a54d2e23050222011243d838c2@mail.gmail.com>

I have the folowing code:
 c=2
 e=3
 s="12"
 code.append('funtion ("c, e,s")')
 print "\n".join(code) + '\n'

The problem is when i call append.
The variables s, c, e are not replaced with their value, so in the end
i get the result:

funtion(" c, e, s");

The result that i want is :
funtion("2,3,12");



-- 
Regards,
 .''`.       # touch universe
: :'  :      # chmod +rwx universe
`. `'`     # ./universe
  `-  Debian - when you have better things to do than fix a system


From kartic.krishnamurthy at gmail.com  Tue Feb  8 11:01:00 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 8 Feb 2005 08:01:00 -0800
Subject: python connect to server using SSH protocol
In-Reply-To: <1107850655.289129.94880@o13g2000cwo.googlegroups.com>
References: <1107850655.289129.94880@o13g2000cwo.googlegroups.com>
Message-ID: <1107876297.696786.259240@g14g2000cwa.googlegroups.com>


ajikoe at gmail.com wrote:
> How can python connect to server which use SSH protocol?
> Is it easy since my python has to run third party vendor, write data,
> read data inside the server (supercomputer).
>
> Any suggestion?
>
> Sincerely Yours,
> Pujo Aji

Pujo,

There are two Python oriented SSH solutions.
1. pyssh (pyssh.sf.net) which is a library for programmatically
controlling ssh.
2. Paramiko (http://www.lag.net/paramiko/) which are python bindings
for the SSH2 protocol.

I have used neither of these packages, so I am in no position to
recommend anything.

Of course, you have the usual popen() functions that you can use to
invoke SSH.

Thanks,
-Kartic



From cookedm+news at physics.mcmaster.ca  Sat Feb 19 14:04:57 2005
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Sat, 19 Feb 2005 14:04:57 -0500
Subject: [ANN] Python 2.4 Quick Reference available
References: <cv79sj$mgk$1@aphrodite.grec.isp.9tel.net>
	<1108831318.290846.5930@z14g2000cwz.googlegroups.com>
Message-ID: <qnkll9kv09y.fsf@arbutus.physics.mcmaster.ca>

"Pete Havens" <peter.havens at gmail.com> writes:

> The is awesome! Thanks. I did notice one thing while reading it. In the
> "File Object" section, it states:
>
> "Created with built-in functions open() [preferred] or its alias
> file()."
>
> ...this seems to be the opposite of the Python documentation:
>
> "The file() constructor is new in Python 2.2. The previous spelling,
> open(), is retained for compatibility, and is an alias for file()."

Except if you look at the current development docs
(http://www.python.org/dev/doc/devel/lib/built-in-funcs.html) it says

"""
The file() constructor is new in Python 2.2 and is an alias for
open(). Both spellings are equivalent. The intent is for open() to
continue to be preferred for use as a factory function which returns a
new file object. The spelling, file is more suited to type testing
(for example, writing "isinstance(f, file)").
"""

... which more accurately reflects what I believe the consensus is
about the usage of open vs. file.

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From peter at somewhere.com  Wed Feb 16 02:54:12 2005
From: peter at somewhere.com (Peter Maas)
Date: Wed, 16 Feb 2005 08:54:12 +0100
Subject: [EVALUATION] - E02 - ULTIMATE RECIPE TO RESOLVE ALL ISSUES
In-Reply-To: <cuo71l$gig$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
Message-ID: <cuv1st$6um$1@swifty.westend.com>

Ilias Lazaridis schrieb:
> I'm a newcomer to python:

Sorry, I'm breaking my promise to post only once to this thread. But
I've found the ultimate recipe to resolve all issues of this and
other similar threads:

Please read

http://nobelprize.org/medicine/educational/pavlov/

and then do something useful :)

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From steven.bethard at gmail.com  Thu Feb  3 14:42:25 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 03 Feb 2005 12:42:25 -0700
Subject: Nested scopes and class variables
In-Reply-To: <t6ydnf4roKOAxmPcRVn-ug@comcast.com>
References: <slrncvrlne.a43.ramen@lackingtalent.com>
	<1gr97zk.1nm8ijn3art4cN%aleaxit@yahoo.com>
	<t6ydnf4roKOAxmPcRVn-ug@comcast.com>
Message-ID: <VrqdnZ50fYk945_fRVn-hw@comcast.com>

I wrote:
> Alex Martelli wrote:
>> See the difference?  In a function, the 'x = x' compiles into LOAD_FAST,
>> STORE_FAST, which only looks at locals and nowhere else.  In a
>> classbody, it compiles to LOAD_NAME, STORE_NAME, which looks at locals
>> AND globals -- but still not at closure cells...
> 
> Is there a reason why the class body doesn't look at closure cells? That 
> is, are there cases where this lookup scheme is preferred to one that 
> checks locals, closure cells and globals?

For anyone who's interested I found a long thread about this here:

http://mail.python.org/pipermail/python-dev/2002-April/023427.html

And a bug report here:

http://sourceforge.net/tracker/?func=detail&aid=532860&group_id=5470&atid=105470

Steve

[1] http://docs.python.org/ref/naming.html


From http  Mon Feb 14 17:55:16 2005
From: http (Paul Rubin)
Date: 14 Feb 2005 14:55:16 -0800
Subject: is there a safe marshaler?
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<1108051828.483222.62670@z14g2000cwz.googlegroups.com>
	<7xmzu6q4cv.fsf@ruckus.brouhaha.com>
	<4211185b$0$28982$e4fe514c@news.xs4all.nl>
	<7xbramzt1c.fsf@ruckus.brouhaha.com>
	<42112b1e$0$28978$e4fe514c@news.xs4all.nl>
Message-ID: <7xacq6sqej.fsf@ruckus.brouhaha.com>

Irmen de Jong <irmen.NOSPAM at xs4all.nl> writes:
> > What do you do about the security issue if you're using pickle?  Do
> > you have to trust the other end to not send you malicious pickles?
> 
> I do nothing about it.
> Yes, you have to trust the other end.
> So you have to use your own -or Pyro's- authentication/authorization
> logic to make sure that the other end can be trusted.
> You could use SSL with certificates for instance.

Well, ok, if you trust then other end then I think it's enough to just
authenticate all the pickles (say using hmac.py) without needing
something as heavyweight as SSL.  If you use SSL you need something
like m2crypto since the SSL option in the socket module doesn't check
certificates, IIRC.

> In fact, this is the reason why I started this thread.
> I wanted to discover some possibilities to replace pickle
> by another thing, so that Pyro becomes 'safe' at the wire
> protocol level.
> But further discussion on the Pyro mailing list sort of
> made it clear that this is not desirable.

Why do you say it's not desirable?  Don't competing protocols like RMI
try to stay safe from malicious peers?  Why should I not want to
expose a Pyro service to the internet?  It's a natural thing to want
to do.


From apardon at forel.vub.ac.be  Mon Feb 28 04:10:07 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 28 Feb 2005 09:10:07 GMT
Subject: Why do descriptors (and thus properties) only work on attributes.
Message-ID: <slrnd25nve.d87.apardon@rcpc42.vub.ac.be>

Can anyone explain why descriptors only work when they are an attribute
to an object or class.  I think a lot of interesting things one can
do with descriptors would be just as interesting if the object stood
on itself instead of being an attribute to an other object.

So what are the reasons for limiting this feature in such a way?

-- 
Antoon Pardon


From skip at pobox.com  Fri Feb 11 13:02:07 2005
From: skip at pobox.com (Skip Montanaro)
Date: Fri, 11 Feb 2005 12:02:07 -0600
Subject: Install MySQLdb on Mac OS X (10.3)
In-Reply-To: <420cc58a$0$27570$9b622d9e@news.freenet.de>
References: <420bf2f4$0$16553$9b622d9e@news.freenet.de>
	<mailman.2360.1108089047.22381.python-list@python.org>
	<420cc58a$0$27570$9b622d9e@news.freenet.de>
Message-ID: <16908.62239.846623.28054@montanaro.dyndns.org>


    >> Try a more recent version of mysql-python.  I think 1.1.7 is the latest.

    TK> It now works with MySQL-python-1.2.0

Andy's a busy guy... ;-)

Skip


From fredrik at pythonware.com  Tue Feb  8 07:23:11 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 13:23:11 +0100
Subject: how to convert 4 bytes into a float ?
References: <cua4gu$pf7$1@s1.news.oleane.net><1grny4s.18evsxl1g1c7eaN%aleaxit@yahoo.com><cua6ag$qj1$1@s1.news.oleane.net>
	<1gro09j.1e2e2kn1967308N%aleaxit@yahoo.com>
Message-ID: <cuaass$6pj$1@sea.gmane.org>

Alex Martelli wrote:

> I don't recall for sure (even though I did my thesis on a Vax, 25 years
> ago!) but I think you _might_ be lucky -- VAX used the binary format
> that became the IEEE standard, if I recall correctly.

iirc, you have to swap bytes around.  the code on this page might
be helpful:

http://www.octave.org/octave-lists/archive/octave-sources.2004/msg00033.html

> The problem would be there if you had, say, floats in old IBM 360/370
> formats, or Cray's original formats, or the like...

here's a IBM 360 converter (at least that's what I think it is; the code is taken
from a PIL format converter for a format that uses "IBM floats"):

    def ibm_f32s(c):
        a = ord(c[0]) & 127
        b = ord(c[3]) + (ord(c[2])<<8) + (ord(c[1])<<16)
        v = pow(2.0, -24) * b * pow(16.0, a-64)
        if ord(c[0]) > 127:
            return -v
        return v

many floating point formats are trivial variations on this theme.

</F> 





From tundra at tundraware.com  Thu Feb  3 20:28:13 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 03 Feb 2005 20:28:13 EST
Subject: OT: why are LAMP sites slow?
In-Reply-To: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
Message-ID: <kavad2-59d.ln1@eskimo.tundraware.com>

Paul Rubin wrote:

<SNIP>

> I've only worked on one serious site of this type and it was "SAJO"
> (Solaris Apache Java Oracle) rather than LAMP, but the concepts are
> the same.  I just feel like something bogus has to be going on.  I
> think even sites like Slashdot handle fewer TPS than a 1960's airline
> reservation that ran on hardware with a fraction of the power of one
> of today's laptops.

I worked for an Airline computer reservation system (CRS) for almost a
decade. There is nothing about today's laptops that remotely comes close
to the power of those CRS systems, even the old ones. CRS systems are
optimized for extremely high performance I/O and use an operating system
(TPF) specifically designed for high-performance transaction processing.

Web servers are very sessions oriented: make a connection-pass the unit
of work-drop the connection. This is inherently slow (and not how high
performance TP is done). Moreover, really high perfomance requires a
very fine level of I/O tuning on the server - at the CRS I worked for,
they performance people actually only populated part of the hard drives
to minimize head seeks.

The point is that *everything* has to be tuned for high performance
TP - the OS, the language constructs (we used assembler for most things),
the protocols, and the overall architecture.  THis is why, IMHO,
things like SOAP a laughable - RPC is a poor foundation for reliable,
durable, and high-performance TP.  It might be fine for sending an
order or invoice now and then, but sustained throughput of the sort
I think of as "high" performance is likely never going to be accomplished
with session-oriented architectures.

For a good overview of TP design, see Jim Gray's book, "Transaction Processing:
Concepts and Techniques".

P.S. AFAIK the first CRS systems of any note came into being in the 1970s not
      the 1960s, but I may be incorrect in the matter.
-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From efrat_regev at yahoo.com  Mon Feb 14 04:27:14 2005
From: efrat_regev at yahoo.com (Efrat Regev)
Date: Mon, 14 Feb 2005 03:27:14 -0600
Subject: Pythonic poker client
References: <1108334914.029293.14830@o13g2000cwo.googlegroups.com>
Message-ID: <Z6-dnb4BDfgrw43fRVn-uw@adelphia.com>

<hardieca at hotmail.com> wrote in message
news:1108334914.029293.14830 at o13g2000cwo.googlegroups.com...
> Hi all,
>
> My PC finally went belly up last week and I'm looking forward to
> playing with my new Mac. However, I play a bit of online poker, and
> there is no Mac client for my poker room.
>
> Ideally, instead of running Virtual PC, I'd much rather build a custom
> poker client with Python. It's an idea I've been kicking around for a
> while, as it would let me create logs and better analyze my playing.
> I'm hoping it would also help me improve my Python coding skills.
>
> I've mostly done web development, so I'm a little out of my element
> here, but I would certainly appreciate any help someone could offer.
> How would one go about porting a client like this?
>

    It's already built into Python :-)

import poker
import poker.holdem
import poker.omaha_eight
import poker.seven_stud
...

But, seriously, any Poker site (at least the commercial ones) go the
opposite direction from using an open protocol. Moreover, they somewhat
compete with themselves on using encryption techniques (Poker site reviews
take encryption into consideration). Finally, I think any Poker site
administrators would do anything possible to block your client, since once
you have a Python Poker client, the door is open to writing an automated
client - bringing on the doom of Poker websites.






From tchur at optushome.com.au  Tue Feb  8 15:04:45 2005
From: tchur at optushome.com.au (Tim Churches)
Date: Wed, 09 Feb 2005 07:04:45 +1100
Subject: Big development in the GUI realm
In-Reply-To: <cuahne$sje$1@sea.gmane.org>
References: <200502072347.j17NlPnh012281@mail07.syd.optusnet.com.au><cu9v2s$5eq$1@sea.gmane.org>	<4208C195.1000104@optushome.com.au>
	<cuahne$sje$1@sea.gmane.org>
Message-ID: <42091B5D.6090904@optushome.com.au>

Fredrik Lundh wrote:

>Tim Churches wrote:
>
>  
>
>>>except that if *you* set things up so the code is combined when run, *you* are
>>>copying, distributing, and/or modifying the program in order to mix, include and/or
>>>combine your work with the GPL:ed work.
>>>
>>>if you leave all that to the user, you're clear.
>>>
>>>      
>>>
>>Yes, that is what I, and others, have been saying, and doing, all along. Our Mozilla Public 
>>Licensed Python application imports (but contains no code from) a GPLed third-party Python module 
>>at runtime, but we don't distribute that module, we just tell users to obtain it independently and 
>>install it on their systems.
>>    
>>
>does your program work (in any way) without this module?
>  
>
Yes.

Tim C



From e at e.e  Tue Feb  8 20:43:32 2005
From: e at e.e (e)
Date: Tue, 8 Feb 2005 17:43:32 -0800
Subject: Lambda
Message-ID: <9VdOd.110$0b3.4668@news.uswest.net>

Question: WHAT IS LAMBDA? I can't figure out what it does from any 
documentation i've found anywhere. i doubt i need it but i still want to 
know what the heck it is/does/fixes/whatever! 




From steven.bethard at gmail.com  Mon Feb  7 15:31:20 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 07 Feb 2005 13:31:20 -0700
Subject: empty classes as c structs?
In-Reply-To: <mailman.2107.1107807729.22381.python-list@python.org>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>	<mailman.2006.1107658273.22381.python-list@python.org>	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>	<mailman.2049.1107750700.22381.python-list@python.org>	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com>
	<4207606E.4040806@iinet.net.au>	<mailman.2094.1107800398.22381.python-list@python.org>	<XYqdnb9bj4sVJZrfRVn-vw@comcast.com>
	<mailman.2107.1107807729.22381.python-list@python.org>
Message-ID: <yNWdnawgn_qPTZrfRVn-sg@comcast.com>

Carlos Ribeiro wrote:
> On Mon, 07 Feb 2005 11:50:53 -0700, Steven Bethard
> <steven.bethard at gmail.com> wrote:
> 
>>Michael Spencer wrote:
>>
>>>We could use __add__, instead for combining namespaces
>>
>>I don't think this is a good idea.  For the same reasons that dicts
>>don't have an __add__ (how should attributes with different values be
>>combined?), I don't think Bunch/Namespace should have an __add__.
> 
> For entirely unrelated reasons I did it for a bunch-like class of
> mine, and called it 'merge'. For this particular application it was a
> better name than update and append, but that's IMHO.

Did 'merge' have the same semantics as the 'update' being discussed? 
That is, did it modify the first 'bunch'?  Or did it create a new 
'bunch'?  To me, 'merge' sounds more like the second...

Steve


From fredrik at pythonware.com  Wed Feb 16 12:54:01 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 16 Feb 2005 18:54:01 +0100
Subject: renaming 'references' to functions can give recursive problems
References: <1108565645.179340.70600@o13g2000cwo.googlegroups.com>
Message-ID: <cv0164$3pj$1@sea.gmane.org>

"peter" <Peter.Vandersteegen at gmail.com> wrote
> ----------------------------------------------------------------------------
> PYTHON-CODE                   # REMARKS
> referenceA = SomeObject()     #  referenceA -> SomeObject()
>                              #       references to the memory space of
>                              #              some object
> referenceB = referenceA       #  referenceB -> SomeObject()
>                              #       is also a reference to ...
> referenceA = referenceB       #  referenceA references to SomeObject()
>
> # now for functions!
> fA = function                 #  fA references to memory space
>                              #  of a function

nope.  it refers to a function object.  function objects are no different
from ordinary objects.

> def newFA(input):             #  newFA references to a function

not yet.

>   return fA(input)           #  which holds a reference to fA.

nope.  the function does not hold a reference to fA.  fA is a global,
and will be resolved at runtime.

>                  #  Notice the important difference with objects!
>                  #  newFA holds a reference to the reference fA

no, it doesn't hold a reference to the reference.  it contains the name
"fA", and will look for that when you call it.

>                  #  When using object you reference to
>                  #  the memory space of fA!!!

you're confused.  resetting your brain and reading the documentation
again might help:

    http://docs.python.org/ref/objects.html
    http://docs.python.org/ref/naming.html

</F> 





From Hegedus.Tamas at mayo.edu  Wed Feb  9 19:22:12 2005
From: Hegedus.Tamas at mayo.edu (Tamas Hegedus)
Date: Wed, 09 Feb 2005 17:22:12 -0700
Subject: hard_decoding
Message-ID: <420AA934.6050206@mayo.edu>

Hi!

Do you have a convinient, easy way to remove special charachters from 
u'strings'?

Replacing:
?????? 	=> A
????	=> e
etc.
'L0xe1szl0xf3' => Laszlo
or something like that:
'L\xc3\xa1szl\xc3\xb3' => Laszlo

Thanks,
Tamas

-- 
Tamas Hegedus, Research Fellow | phone: (1) 480-301-6041
Mayo Clinic Scottsdale         | fax:   (1) 480-301-7017
13000 E. Shea Blvd             | mailto:hegedus at mayo.edu
Scottsdale, AZ, 85259          | http://hegedus.brumart.org


From tjreedy at udel.edu  Fri Feb  4 17:04:27 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 4 Feb 2005 17:04:27 -0500
Subject: Weekly Python Patch/Bug Summary
References: <mailman.1866.1107492129.22381.python-list@python.org>
	<ctvo2s$lio$1@ctb-nnrp2.saix.net>
Message-ID: <cu0rfo$6a3$1@sea.gmane.org>


"David Fraser" <davidf at sjsoft.com> wrote in message 
news:ctvo2s$lio$1 at ctb-nnrp2.saix.net...
> Kurt B. Kaiser wrote:
>> Patch / Bug Summary
>> ___________________
>>
>> Patches :  284 open ( +4) /  2748 closed ( +1) /  3032 total ( +5)
>> Bugs    :  804 open ( +1) /  4812 closed (+13) /  5616 total (+14)
>> RFE     :  167 open ( +0) /   142 closed ( +1) /   309 total ( +1)
>
> I wonder if it would be possible to include the status of the closed bugs 
> ... if a patch has been refused thats very different to it being 
> included. I usually end up opening the page to see what has happened, 
> would be nice if it was in the mail...

I agree that this would be nice.  However, if Kurt's summaries are derived 
from SF's summary lists, and not from individual tracker items, then doing 
so would require revision of the report script to essentially do the same 
thing you do -- open the item and scrap off the resolution field.  Easily 
done, I think, but more that 5 minutes of work.

Since these postings are copies of reports that used to only be posted in 
py-dev, Kurt may not see reponses here unless emailed to him directly or 
perhaps posted to py-dev.

Terry J. Reedy






From bvande at po-box.mcgill.ca  Mon Feb  7 11:10:08 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Mon, 07 Feb 2005 11:10:08 -0500
Subject: empty classes as c structs?
In-Reply-To: <1grl6r9.14ogjvkzi3r3iN%aleaxit@yahoo.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
	<MIadnXkLYul4hZjfRVn-2Q@comcast.com>
	<mailman.1991.1107637382.22381.python-list@python.org>
	<1grl6r9.14ogjvkzi3r3iN%aleaxit@yahoo.com>
Message-ID: <420792E0.5010900@po-box.mcgill.ca>

Alex Martelli said unto the world upon 2005-02-06 18:06:
> Brian van den Broek <bvande at po-box.mcgill.ca> wrote:
>    ...
> 
>>(I'm just a hobbyist, so if this suggestion clashes with some well 
>>established use of 'Bag' in CS terminology, well, never mind.)
> 
> 
> Yep: a Bag is a more common and neater name for a "multiset" -- a
> set-like container which holds each item ``a certain number of times''
> (you can alternatively see it as a mapping from items to counts of
> number of times the item is held).
> 
> 
> Alex

Thanks for that info. I've yet to check the link to the Bag cookbook 
recipe that Carlos Ribeiro posted for me 
<http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/259174>, but 
now I definitely will! (When I first learned of Python's set type, I 
was disappointed there wasn't also a multi-set type.)

Thanks and best,

Brian vdB



From douardda at free.fr  Wed Feb  2 18:43:19 2005
From: douardda at free.fr (David Douard)
Date: Thu, 03 Feb 2005 00:43:19 +0100
Subject: Basic file operation questions
References: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
	<mailman.1778.1107380998.22381.python-list@python.org>
Message-ID: <42016294$0$17053$626a14ce@news.free.fr>

Marcel van den Dungen wrote:

> alex wrote:
>> Hi,
>> 
>> I am a beginner with python and here is my first question:
>> How can I read the contents of a file using a loop or something? I open
>> the file with file=open(filename, 'r') and what to do then? Can I use
>> something like
>> 
>> for xxx in file:
>>    ....
>> 
>> 
>> Thanks for help
>> Alex
>> 
> take a look at this:
> http://www.devshed.com/c/a/Python/File-Management-in-Python/
> 
> HTH,
> -- Marcel

Or even have a look at the excellent Gnosis book on the subject (and very
much more further, but...):
http://gnosis.cx/TPiP/ which is freely available in text format.

David






From alanmk at hotmail.com  Thu Feb 10 19:55:22 2005
From: alanmk at hotmail.com (Alan Kennedy)
Date: Fri, 11 Feb 2005 00:55:22 +0000
Subject: is there a safe marshaler?
In-Reply-To: <420bedb4$0$28975$e4fe514c@news.xs4all.nl>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<9RMOd.47295$Z14.32810@news.indigo.ie>
	<420bd184$0$28994$e4fe514c@news.xs4all.nl>
	<DtROd.47310$Z14.32852@news.indigo.ie>
	<420bedb4$0$28975$e4fe514c@news.xs4all.nl>
Message-ID: <YjTOd.47318$Z14.32821@news.indigo.ie>

[Alan Kennedy]
 >> Well, the python JSON codec provided appears to use eval, which might
 >> make it *seem* unsecure.
 >>
 >> http://www.json-rpc.org/pyjsonrpc/index.xhtml
 >>
 >> But a more detailed examination of the code indicates, to this reader
 >> at least, that it can be made completely secure very easily. The
 >> designer of the code could very easily have not used eval, and
 >> possibly didn't do so simply because he wasn't thinking in security
 >> terms.

[Irmen de Jong]
 > I think we (?) should do this then, and send it to the author
 > of the original version so that he can make an improved version
 > available? I think there are more people interested in a secure
 > marshaling implementation than just me :)

I should learn to keep my mouth zipped :-L

OK, I really don't have time for a detailed examination of either the 
JSON spec or the python impl of same. And I *definitely* don't have time 
for a detailed security audit, much though I'd love to.

But I'll try to help: the code changes are really very simple. So I've 
edited the single affected file, json.py, and here's a patch: But be 
warned that I haven't even run this code!

Index: json.py
===================================================================
--- json.py	(revision 2)
+++ json.py	(working copy)
@@ -66,8 +66,10 @@

      def parseValue(self, tkns):
          (ttype, tstr, ps, pe, lne) = tkns.next()
-        if ttype in [token.STRING, token.NUMBER]:
-            return eval(tstr)
+        if ttype  == token.STRING:
+            return unicode(tstr)
+        if ttype  == token.NUMBER:
+            return float(tstr)
          elif ttype == token.NAME:
              return self.parseName(tstr)
          elif ttype == token.OP:
@@ -110,7 +112,12 @@
              while 1:
                  (ttype, tstr, ps, pe, lne) = tkns.next()
                  if ttype == token.STRING:
-                    nme =  eval(tstr)
+                    possible_ident = unicode(tstr)
+                    try:
+                        # Python identifiers have to be ascii
+                        nme =  possible_ident.encode('ascii')
+                    except UnicodeEncodeError:
+                        raise "Non-ascii identifier"
                      (ttype, tstr, ps, pe, lne) = tkns.next()
                      if tstr == ":":
                          v = self.parseValue(tkns)

I'll leave contacting the author to you, if you wish.

 > I'll still have to look at Twisted's Jelly.

Hmmm, s-expressions, interesting. But you'd have to write your own 
s-expression parser and jelly RPC client to get up and running in other 
languages.

regards,

-- 
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan


From BOOGIEMANPN at YAHOO.COM  Tue Feb 15 17:31:37 2005
From: BOOGIEMANPN at YAHOO.COM (BOOGIEMAN)
Date: Tue, 15 Feb 2005 23:31:37 +0100
Subject: Font size
References: <42126822@news.comindico.com.au>
Message-ID: <ldzqyx6byqdw$.wt8smryc0t3.dlg@40tude.net>

On Tue, 15 Feb 2005 21:22:43 GMT, Adam wrote:

> Please help me.
> How do you clear the screen and then display a number with an enlarged font 
> size (about 300).
> Adam.

To clear screen in windows :

#at the beggining of the program
import os

#when you want to clear the screen
os.system("cls")


From snail at objmedia.demon.co.uk  Mon Feb 14 16:07:59 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Mon, 14 Feb 2005 21:07:59 +0000
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<cup249$svu$1@gemini.csx.cam.ac.uk> <cupqb6$1oi$1@usenet.otenet.gr>
	<cups17$kbs$1@gemini.csx.cam.ac.uk> <cupvmh$os2$1@usenet.otenet.gr>
	<mailman.2520.1108379101.22381.python-list@python.org>
	<cuq32h$a3e$1@usenet.otenet.gr> <4210c5c3$0$41647$a1866201@visi.com>
	<cuqta4$4c1$2@usenet.otenet.gr>
Message-ID: <$V$QoHxvMRECFwFz@objmedia.demon.co.uk>

In message <cuqta4$4c1$2 at usenet.otenet.gr>, Ilias Lazaridis 
<ilias at lazaridis.com> writes
>I like to synchronize any efforts with the existing ones.

I assume the reason for doing that would be to avoid duplicating effort? 
If that is the case why do you want lots of people all to answer your 
questionnaire. Thats a huge duplication of effort.

A much more effective use of effort would be for you to do the research 
and when you are done to ask people to comment on the *results* of the 
research, not the questions.

This accomplishes several things:
o Reduction in duplication of effort.
o Demonstrates to everyone else that you are prepared to do some work 
before asking questions.
o When you find that the response is much more welcoming than you have 
had so far you will have learnt that you need to put some effort in to 
get some reward out (which is what most of us have been trying to tell 
you).

Of course, based on your behaviour here (and currently in comp.lang.ruby 
where you are spinning a nice yarn in not bothering to read up on the 
answers people give you, even when their answers are detailed), I have 
not much hope of you taking the above approach.

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From andyl at motorola.com  Fri Feb 18 13:03:08 2005
From: andyl at motorola.com (Andy Leszczynski)
Date: Fri, 18 Feb 2005 12:03:08 -0600
Subject: wxPython demo /Process does not open new demo
In-Reply-To: <cv5ahn$he7$1@avnika.corp.mot.com>
References: <cv5ahn$he7$1@avnika.corp.mot.com>
Message-ID: <cv5akl$he7$2@avnika.corp.mot.com>

Andy Leszczynski wrote:

> Try to run wxPython 2.5 (for python 2.3) demo. Then Open Process and 
> Events/Process. Type in "python -u demo.py" and wait. There is a splash 
> screen but nothing more. Why?
> 
> Regards,A.

Forgot to add that it happnes on Win2K.



From rkern at ucsd.edu  Wed Feb 16 04:55:49 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Wed, 16 Feb 2005 01:55:49 -0800
Subject: Variables.
In-Reply-To: <614c778e.0502160134.6bd72448@posting.google.com>
References: <614c778e.0502150429.1a2a4d8d@posting.google.com>
	<614c778e.0502160134.6bd72448@posting.google.com>
Message-ID: <cuv5b5$ij3$1@news1.ucsd.edu>

administrata wrote:
> sry, I mean the problem is... about lining
> 
> it doesn't look like this...
> 
> Allen woke up early in the morning. But, it was unusal by Allen.
> Allen's pillow was with Allen. Allen didn't want to wake up But, Allen
> tried my best and woke up. it was so amazing

In the future, please follow the advice given on this page:

   http://www.catb.org/~esr/faqs/smart-questions.html

Also, consider joining the tutor mailing list.

   http://mail.python.org/mailman/listinfo/tutor

For this problem, see the textwrap module in the standard library.

   http://docs.python.org/lib/module-textwrap.html

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From steven.bethard at gmail.com  Mon Feb 21 13:50:23 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 21 Feb 2005 11:50:23 -0700
Subject: [OT] Re: lambda closure question
In-Reply-To: <slrnd1jjo4.jkb.apardon@rcpc42.vub.ac.be>
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
	<slrnd1jjo4.jkb.apardon@rcpc42.vub.ac.be>
Message-ID: <Sc-dnXLwVtT3sIffRVn-tA@comcast.com>

Antoon Pardon wrote:
>>>>def F():
> ...   l = []
> ...   def pop():
> ...     return l.pop()
> ...   def push(e):
> ...     l.append(e)
> ...   return pop, push
> ... 

Just a side note to point out that another way of writing this is:

py> def F():
...     l = []
...     return l.pop, l.append
...

You'll get the same behavior:

py> pop, push = F()
py> push(1)
py> pop()
1
py> push(2)
py> push(3)
py> pop()
3
py> pop()
2

Hooray for bound methods! ;)

STeVe


From luismgz at gmail.com  Thu Feb  3 21:22:42 2005
From: luismgz at gmail.com (Luis M. Gonzalez)
Date: 3 Feb 2005 18:22:42 -0800
Subject: Is there a market for python developers?
In-Reply-To: <nqGdnWsrpaFJpZ_fRVn-qA@powergate.ca>
References: <1107440354.317628.221090@g14g2000cwa.googlegroups.com>
	<nqGdnWsrpaFJpZ_fRVn-qA@powergate.ca>
Message-ID: <1107483762.470622.114300@f14g2000cwb.googlegroups.com>


Peter Hansen wrote:
> Yes.

Man of few words...



From frengky at netcom.no  Wed Feb  2 15:40:04 2005
From: frengky at netcom.no (=?iso-8859-15?Q?=F8ystein?=)
Date: Wed, 02 Feb 2005 21:40:04 +0100
Subject: forms, xslt and python
Message-ID: <opslk7o2c1yqlbtb@frengky>

Hi!

I got an xml file that goes like this.

<question id=10 correct_answer=2>
<alternative>Answer 1</alternative>
<alternative>Answer 2</alternative>
<alternative>Answer 3</alternative>
<alternative>Answer 4</alternative>
</question>

I've made an xslt transformation and put the alternatives into radio  
buttons (html form) so the user can choose the correct answer by

I am able to list all the questions and the id's via via python and return  
them to the webpage. Put how can I get the value from the alternative  
element? How can I verify that the user have answered correct?


Regards
Frengky


From martin.sand.christensen at gmail.com  Sun Feb 13 11:56:58 2005
From: martin.sand.christensen at gmail.com (Martin Christensen)
Date: Sun, 13 Feb 2005 17:56:58 +0100
Subject: Suggesion for an undergrad final year project in Python
References: <1107241918.722156.123590@c13g2000cwb.googlegroups.com>
Message-ID: <87vf8wiejp.fsf@gmail.com>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

>>>>> "Sridhar" == Sridhar  <sridharinfinity at gmail.com> writes:
Sridhar> I am doing my undergrade CS course.  I am in the final year,
Sridhar> and would like to do my project involving Python.  Our
Sridhar> instructors require the project to have novel ideas.  Can the
Sridhar> c.l.p people shed light on this topic?

I'm arriving a bit late in this discussion, but might as well throw in
my bit anyway.

I did my master's thesis implementation thingy in Python, and still
managed, from what I can tell from available research material, to
make the fastest RDBMS search engine of its kind. :-)

But really, implementation language is, or should be, a fairly minor
issue compared to what exactly it is that you want to do. For some
things, your choice of language might be very important, but until you
know what you're going to do, there's really very little need to worry
about it, at least in my opinion.

Martin

- -- 
Homepage:       http://www.cs.auc.dk/~factotum/
GPG public key: http://www.cs.auc.dk/~factotum/gpgkey.txt
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.5 (GNU/Linux)
Comment: Using Mailcrypt+GnuPG <http://www.gnupg.org>

iEYEARECAAYFAkIPhtoACgkQYu1fMmOQldVWRACgxSDK80tc5iSFrqnHdi/Ydwg9
qmwAoOk4wiQ9LNUhteuTtbZrrzo6CJfh
=yO5X
-----END PGP SIGNATURE-----


From luc at pasdespams.fr  Sun Feb 27 09:31:03 2005
From: luc at pasdespams.fr (Luc)
Date: Sun, 27 Feb 2005 15:31:03 +0100
Subject: problem installing wxPython 2.5.3, wxWidgets installed ok
References: <1109344901.877838.71280@o13g2000cwo.googlegroups.com>
Message-ID: <4221d97a$0$19337$8fcfb975@news.wanadoo.fr>

timothy.williams at nvl.army.mil a ?crit:

> I'm trying to install wxPython 2.5.3.1 using Python 2.3.2 on a Fedora 2
> machine.
> 
> I have python in a non-standard place, but I'm using --prefix with the
> configure script to point to where I have everything. The make install
> in $WXDIR seemed to go fine. I have the libxw* libraries in my lib/
> directory
> 
> libwx_base-2.5.so@            libwx_gtk_adv-2.5.so.3.0.0*
> libwx_base-2.5.so.3@          libwx_gtk_core-2.5.so@
> libwx_base-2.5.so.3.0.0*      libwx_gtk_core-2.5.so.3@
> libwx_base_net-2.5.so@        libwx_gtk_core-2.5.so.3.0.0*
> libwx_base_net-2.5.so.3@      libwx_gtk_gl-2.4.so@
> libwx_base_net-2.5.so.3.0.0*  libwx_gtk_gl-2.4.so.0@
> libwx_base_xml-2.5.so@        libwx_gtk_gl-2.4.so.0.1.1*
> libwx_base_xml-2.5.so.3@      libwx_gtk_html-2.5.so@
> libwx_base_xml-2.5.so.3.0.0*  libwx_gtk_html-2.5.so.3@
> libwx_gtk-2.4.so@             libwx_gtk_html-2.5.so.3.0.0*
> libwx_gtk-2.4.so.0@           libwx_gtk_xrc-2.5.so@
> libwx_gtk-2.4.so.0.1.1*       libwx_gtk_xrc-2.5.so.3@
> libwx_gtk_adv-2.5.so@         libwx_gtk_xrc-2.5.so.3.0.0*
> libwx_gtk_adv-2.5.so.3@
> 
> I also have a wx/ directory under my lib. directory.
> 
> The problem is when I try to do a 'python setup.py install' in the
> ./wxPython directory.  I get a message about not finding a config file
> for wx-config and then several errors during gcc compiles.
> 
>> python setup.py build
> Found wx-config: /project/c4i/Users_Share/williams/Linux/bin/wx-config
>     Using flags:  --toolkit=gtk2 --unicode=no --version=2.5
> 
>   Warning: No config found to match:
> /project/c4i/Users_Share/williams/Linux/bin/wx-config --toolkit=gtk2
> --unicode=no --version=2.5 --cxxflags
>            in /project/c4i/Users_Share/williams/Linux/lib/wx/config
>   If you require this configuration, please install the desired
>   library build.  If this is part of an automated configuration
>   test and no other errors occur, you may safely ignore it.
>   You may use wx-config --list to see all configs available in
>   the default prefix.
> 
> ...
> 
> Preparing OGL...
> Preparing STC...
> Preparing GIZMOS...
> running build
> running build_py
> copying wx/__version__.py -> build-gtk2/lib.linux-i686-2.3/wx
> running build_ext
> building '_core_' extension
> creating build-gtk2/temp.linux-i686-2.3
> creating build-gtk2/temp.linux-i686-2.3/src
> creating build-gtk2/temp.linux-i686-2.3/src/gtk
> gcc -pthread -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
> -Wstrict-prototypes -fPIC -DSWIG_GLOBAL -DHAVE_CONFIG_H
> -DWXP_USE_THREAD=1 -UNDEBUG -DXTHREADS -D_REENTRANT -DXUSE_MTSAFE_API
> -Iinclude -Isrc -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include
> -I/usr/X11R6/include -I/usr/include/atk-1.0 -I/usr/include/pango-1.0
> -I/usr/include/freetype2 -I/usr/include/freetype2/config
> -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include
> -I/project/c4i/Users_Share/williams/Linux/include/python2.3 -c
> src/libpy.c -o build-gtk2/temp.linux-i686-2.3/src/libpy.o -O3
> gcc -pthread -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
> -Wstrict-prototypes -fPIC -DSWIG_GLOBAL -DHAVE_CONFIG_H
> -DWXP_USE_THREAD=1 -UNDEBUG -DXTHREADS -D_REENTRANT -DXUSE_MTSAFE_API
> -Iinclude -Isrc -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include
> -I/usr/X11R6/include -I/usr/include/atk-1.0 -I/usr/include/pango-1.0
> -I/usr/include/freetype2 -I/usr/include/freetype2/config
> -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include
> -I/project/c4i/Users_Share/williams/Linux/include/python2.3 -c
> src/gtk/_core_wrap.cpp -o
> build-gtk2/temp.linux-i686-2.3/src/gtk/_core_wrap.o -O3
> cc1plus: warning: command line option "-Wstrict-prototypes" is valid
> for Ada/C/ObjC but not for C++
> In file included from src/gtk/_core_wrap.cpp:400:
> include/wx/wxPython/wxPython_int.h:19:19: wx/wx.h: No such file or
> directory
> include/wx/wxPython/wxPython_int.h:21:25: wx/busyinfo.h: No such file
> or directory
> include/wx/wxPython/wxPython_int.h:22:22: wx/caret.h: No such file or
> directory
> include/wx/wxPython/wxPython_int.h:23:25: wx/choicebk.h: No such file
> or directory
> include/wx/wxPython/wxPython_int.h:24:24: wx/clipbrd.h: No such file or
> directory
> include/wx/wxPython/wxPython_int.h:25:25: wx/colordlg.h: No such file
> or directory
> include/wx/wxPython/wxPython_int.h:26:23: wx/config.h: No such file or
> directory
> include/wx/wxPython/wxPython_int.h:27:23: wx/cshelp.h: No such file or
> directory
> include/wx/wxPython/wxPython_int.h:28:25: wx/dcmirror.h: No such file
> or directory
> include/wx/wxPython/wxPython_int.h:29:21: wx/dcps.h: No such file or
> directory
> include/wx/wxPython/wxPython_int.h:30:24: wx/dirctrl.h: No such file or
> directory
> include/wx/wxPython/wxPython_int.h:31:23: wx/dirdlg.h: No such file or
> directory
> include/wx/wxPython/wxPython_int.h:32:20: wx/dnd.h: No such file or
> directory
> include/wx/wxPython/wxPython_int.h:33:24: wx/docview.h: No such file or
> directory
> include/wx/wxPython/wxPython_int.h:34:24: wx/encconv.h: No such file or
> directory
> include/wx/wxPython/wxPython_int.h:35:25: wx/fdrepdlg.h: No such file
> or direct
> 
> ...
> 
> Why isn't there a -I../include switch on the compile line, and how do I
> reconfigure it so it does?
> 
> Thanks for any help.
pay attention: some of your current applications will not work with that
version. In my case, all the apps I have wrotten before and with previous
2.4 as well with the boa-constructor IDE


From alan.mcintyre at esrgtech.com  Sun Feb 13 15:45:07 2005
From: alan.mcintyre at esrgtech.com (Alan McIntyre)
Date: Sun, 13 Feb 2005 15:45:07 -0500
Subject: changing __call__ on demand
In-Reply-To: <cuo1q1$m6h$2@gemini.csx.cam.ac.uk>
References: <cuo0e1$4l2$1@lnx107.hrz.tu-darmstadt.de>
	<AJLPd.107521$Jk5.31052@lakeread01>
	<cuo1q1$m6h$2@gemini.csx.cam.ac.uk>
Message-ID: <n%OPd.107653$Jk5.92897@lakeread01>

Thanks; I didn't read close enough. :)

-- 
Alan McIntyre
ESRG LLC
http://www.esrgtech.com

Michael Hoffman wrote:
> Alan McIntyre wrote:
> 
>> >>>class test(object):
>> ...    def __call1(self):
>> ...        print 1
>> ...    __call__ = __call1
>> Is that what you were looking for?
> 
> 
> That still only allows him to have one call function per class.


From steve at holdenweb.com  Wed Feb  2 17:26:30 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 02 Feb 2005 17:26:30 -0500
Subject: Getting a module's byte code, how?
In-Reply-To: <pan.2005.02.02.22.06.22.395829@freelance-developer.com>
References: <42014e25$0$28975$e4fe514c@news.xs4all.nl>
	<pan.2005.02.02.22.06.22.395829@freelance-developer.com>
Message-ID: <CxcMd.102641$Jk5.35575@lakeread01>

Mark Nenadov wrote:

> On Wed, 02 Feb 2005 23:03:17 +0100, Irmen de Jong wrote:
> 
> 
>>What would be the best way, if any, to obtain
>>the bytecode for a given loaded module?
>>
>>I can get the source:
>>import inspect
>>import os
>>src = inspect.getsource(os)
>>
>>but there is no ispect.getbytecode()  ;-)
>>
>>--Irmen
> 
> 
> The inspect API documentation says that code objects have "co_code", which
> is a string of raw compiled bytecode.
> 
> Hope that helps!
> 
Unfortunately co_code is an attribute of code objects, and a module 
doesn't *have* a code object, as far as I know - when it's imported its 
bytecode is executed in the scope of the module directory, but no 
attempt is made to keep the code around thereafter: what would be the point?

Having said which, if the module was loaded from a .pyc file then the 
bytecode is available from that - take everything but the first eight 
bytes and use marshal.loads() to turn it back into a code object:

  >>> mbc = file("/lib/python2.4/re.pyc", "rb").read()[8:]
  >>> import marshal
  >>> code = marshal.loads(mbc)
  >>> code
<code object ? at 0xa085d60, file 
"/tmp/python.2568/usr/lib/python2.4/re.py", line 1>
  >>>

Note that the ugly details *might* change, and that byte codes are 
version-dependent.

tadaaa-ly y'rs  - steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005          http://www.python.org/pycon/2005/
Steve Holden                           http://www.holdenweb.com/


From chris.cavalaria at free.fr  Fri Feb  4 14:43:47 2005
From: chris.cavalaria at free.fr (Christophe Cavalaria)
Date: Fri, 04 Feb 2005 20:43:47 +0100
Subject: ANN: PyDev 0.9.0 released
References: <mailman.1829.1107453373.22381.python-list@python.org>
Message-ID: <36i1jjF4k10ecU1@individual.net>

Fabio Zadrozny wrote:

> Hi All,
> 
> PyDev - Python IDE (Python development enviroment for Eclipse) version
> 0.9.0 has just been released.
> 
> This release supports python 2.4 and has PyLint 0.6 integrated.
> Code completion had some improvements too.
> 
> Check the homepage for more details (http://pydev.sourceforge.net/).
> 
> Regards,
> 
> Fabio Zadrozny
> ------------------------------------------------------
> Software Developer
> ESSS - Engineering Simulation and Scientific Software
> www.esss.com.br
It looks great but I couldn't get Eclipse to stop using tabs to ident my
code, despite the corresponding option in the PyDev preferences window. Is
there something I can do for that ?



From dotpyFE at gmail.com  Mon Feb 28 08:06:11 2005
From: dotpyFE at gmail.com (Lucas Raab)
Date: Mon, 28 Feb 2005 13:06:11 GMT
Subject: Python interfacing with other languages
In-Reply-To: <1109560856.234202.62790@l41g2000cwc.googlegroups.com>
References: <mailman.3125.1109548663.22381.python-list@python.org>
	<1109560856.234202.62790@l41g2000cwc.googlegroups.com>
Message-ID: <7HEUd.2078$wy3.201@newsread3.news.atl.earthlink.net>

wuhy80 wrote:
> Sure It can work with VB.
> you could use the python's com to work with VB.
> 

Take a look at Mark Hammond's Win32 suite of modules. 
http://starship.python.net/crew/mhammond/


From ville at spammers.com  Wed Feb  2 07:45:51 2005
From: ville at spammers.com (Ville Vainio)
Date: 02 Feb 2005 14:45:51 +0200
Subject: Python for S60 mentioned in a mainstream Finnish e-news website
References: <du7wttrb8wf.fsf@lehtori.cc.tut.fi>
	<du7sm4fb3dg.fsf@lehtori.cc.tut.fi> <651bduh8.fsf@python.net>
Message-ID: <du7r7jz5dvk.fsf@lehtori.cc.tut.fi>

>>>>> "Thomas" == Thomas Heller <theller at python.net> writes:

    >> (Yeah, ctypes will probably be a problem because of the way Symbian
    >> handles DLLs)

    Thomas> How *does* symbian handle DLLs?

By ordinal, so the dll does not include the symbol name (in order to
keep the size small). Linker finds the ordinals from the .LIB file
that corresponds to the DLL.

(Someone who knows better might want to correct me if I'm wrong).

-- 
Ville Vainio   http://tinyurl.com/2prnb


From fredrik at pythonware.com  Mon Feb 14 14:01:01 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 20:01:01 +0100
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr><1108398011.213872.321390@o13g2000cwo.googlegroups.com><mailman.2543.1108399510.22381.python-list@python.org>
	<1108405626.130007.320710@l41g2000cwc.googlegroups.com>
Message-ID: <cuqscc$toc$1@sea.gmane.org>

"Pat"wrote:

> I thought I was being as clear and specific as I needed to be.
> Apparently not.  I'm talking about compiling the original source code

the python source or the extension source?

    > The bottom line is that compiling C extension modules

would indicate the latter.  setup.py handles that just fine, if you have the
right tools.  no pain at all.

> Now, if you know something I don't, I'm all ears.  But I don't see how
> your suggestion solves my problem.

if your problem is compiling C extension modules, I suggest getting a
good compiler.  I've done that, and compiling C extension modules is
no problem at all.

if your problem is that you don't want to use a good compiler, or that
your company cannot afford to buy you a compiler, or you have other
reasons to chose the "pain in the ass" way over the "it just works" way,
I'm afraid I cannot help you.  my time's too precious to waste on inferior
tools.

</F> 





From jack at performancedrivers.com  Thu Feb 10 20:06:35 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Thu, 10 Feb 2005 20:06:35 -0500
Subject: [perl-python] combinatorics fun
In-Reply-To: <1108075884.250995.62520@g14g2000cwa.googlegroups.com>
References: <1108075884.250995.62520@g14g2000cwa.googlegroups.com>
Message-ID: <20050211010635.GD14175@performancedrivers.com>

On Thu, Feb 10, 2005 at 02:51:24PM -0800, Xah Lee wrote:
> a year ago i wrote this perl program as part of a larger program.
> 
> as a exercise of fun, let's do a python version. I'll post my version
> later today.

from probstat import Combination

There is something deeply wrong about plugging your own module when
responding to a troll.

-Jack

ps, Foxtrot Oscar Alpha Delta


From deetsNOSPAM at web.de  Wed Feb 16 11:41:45 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 16 Feb 2005 17:41:45 +0100
Subject: Getting milliseconds in Python
References: <1108565135.167562.196830@z14g2000cwz.googlegroups.com>
	<37h5epF5ck38lU2@individual.net>
	<1108571009.698970.152020@z14g2000cwz.googlegroups.com>
Message-ID: <37hbdlF5bn70kU1@individual.net>

mjs7231 wrote:

> "Return the time as a floating point number expressed in seconds since
> the epoch, in UTC. Note that even though the time is always returned as
> a floating point number, not all systems provide time with a better
> precision than 1 second. While this function normally returns
> non-decreasing values, it can return a lower value than a previous call
> if the system clock has been set back between the two calls. "
> 
> This is no good, I am looking for milliseconds, not seconds.. as stated
> above.

If your system _can_ provide better accuracy than seconds, it is returned as
fraction of a second. That is the whole point the result of time being a
float and not an int.

-- 
Regards,

Diez B. Roggisch


From steve at holdenweb.com  Fri Feb  4 08:10:03 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 04 Feb 2005 08:10:03 -0500
Subject: OT: why are LAMP sites slow?
In-Reply-To: <7xvf99ndfx.fsf@ruckus.brouhaha.com>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<mailman.1857.1107479377.22381.python-list@python.org>
	<7xis59qgaz.fsf@ruckus.brouhaha.com>
	<mailman.1864.1107490291.22381.python-list@python.org>
	<7xvf99ndfx.fsf@ruckus.brouhaha.com>
Message-ID: <ZzKMd.103062$Jk5.60987@lakeread01>

Paul Rubin wrote:

> Skip Montanaro <skip at pobox.com> writes:
> 
>>It's more than a bit unfair to compare Wikipedia with Ebay or
>>Google.  Even though Wikipedia may be running on high-performance
>>hardware, it's unlikely that they have anything like the underlying
>>network structure (replication, connection speed, etc), total number
>>of cpus or monetary resources to throw at the problem that both Ebay
>>and Google have.  I suspect money trumps LAMP every time.
> 
> 
> I certainly agree about the money and hardware resource comparison,
> which is why I thought the comparison with 1960's mainframes was
> possibly more interesting.  You could not get anywhere near the
> performance of today's servers back then, no matter how much money you
> spent.  Re connectivity, I wonder what kind of network speed is
> available to sites like Ebay that's not available to Jane Webmaster
> with a colo rack at some random big ISP.  Also, you and Tim Danieliuk
> both mentioned caching in the network (e.g. Akamai).  I'd be
> interested to know exactly how that works and how much difference it
> makes.
> 
It works by distributing content across end-nodes distributed throughout 
the infrastructure. I don't think Akamai make any secret of their 
architecture, so Google (:-) can help you there.

Of course it makes a huge difference, otherwise Google wouldn't have 
registered their domain name as a CNAME for an Akamai node set.

[OB PyCon] Jeremy Hylton, a Google employee and formerly a PythonLabs 
employee, will be at PyCon. Why don;t you come along and ask *him*?

> But the problems I'm thinking of are really obviously with the server
> itself.  This is clear when you try to load a page and your browser
> immediately get the static text on the page, followed by a pause while
> the server waits for the dynamic stuff to come back from the database.
> Serving a Slashdotting-level load of pure static pages on a small box
> with Apache isn't too terrible ("Slashdotting" = the spike in hits
> that a web site gets when Slashdot's front page links to it).  Doing
> that with dynamic pages seems to be much harder.  Something is just
> bugging me about this.  SQL servers provide a lot of capability (ACID
> for complicated queries and transactions, etc). that most web sites
> don't really need.  They pay the price in performance anyway.
> 
Well there's nothing wrong with caching dynamic content when the 
underlying database isn't terribly volatile and there is no critical 
requirement for the absolute latest data. Last I heard Google weren't 
promising that their searches are up-to-the-microsecond in terms of 
information content.

In terms on a network like Google's talking about "the server" doesn't 
really make sense: as Sun Microsystems have been saying for about twenty 
years now, "the network is the computer". There isn't "a server", it's 
"a distributed service with multiple centers of functionality".
> 
>>We also know Google has thousands of CPUs (I heard 5,000 at one point and
>>that was a couple years ago).
> 
> 
> It's at least 100,000 and probably several times that ;-).  I've heard
> every that search query does billions of cpu operations and crunches
> through 100's of megabytes of data (search on "apple banana" and there
> are hundreds of millions of pages with each word, so two lists of that
> size must be intersected).  100,000 was the published number of
> servers several years ago, and there were reasons to believe that they
> were purposely understating the real number.

So what's all this about "the server", then? ;-)

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From ncoghlan at iinet.net.au  Fri Feb  4 22:39:56 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 05 Feb 2005 13:39:56 +1000
Subject: changing local namespace of a function
In-Reply-To: <cu0sj5$sfk$1@sea.gmane.org>
References: <cu0lru$8ik$1@joe.rice.edu> <cu0sj5$sfk$1@sea.gmane.org>
Message-ID: <4204400C.5060608@iinet.net.au>

Michael Spencer wrote:
>> def fun(dict):
>>   # set dict as local namespace
>>   # locals() = dict?
>>   z = x + y
> 
> As you no doubt have discovered from the docs and this group, that isn't 
> doable with CPython.

Not entirely impossible:

Py> def f(d):
...   exec "locals().update(d)"
...   return x + y
...
Py> f(dict(x=1, y=2))
3

Due to the way 'exec' is implemented, modifications to locals() inside an exec 
statement actually take effect (basically, they're freeloading on the code which 
allows 'exec "x = 1"' to work properly).

This is an evil, evil hack and almost certainly not what anyone should be doing. 
Also, variables created this way will be slower than normal variables due to the 
way the associated code works.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From devries at idolstarastronomer.com  Thu Feb 24 16:51:22 2005
From: devries at idolstarastronomer.com (Christopher De Vries)
Date: Thu, 24 Feb 2005 16:51:22 -0500
Subject: Canonical way of dealing with null-separated lines?
In-Reply-To: <5aes11d4da95un1n78vtb04m43269hqo4m@4ax.com>
References: <lcll9efw8l.fsf@gaffa.mit.edu>
	<mailman.3006.1109264015.22381.python-list@python.org>
	<5aes11d4da95un1n78vtb04m43269hqo4m@4ax.com>
Message-ID: <20050224215122.GA16033@miyu.cjas.org>

On Fri, Feb 25, 2005 at 07:56:49AM +1100, John Machin wrote:
> Try this:
> !def readweird(f, line_end='\0', bufsiz=8192): 
> !    retain = '' 
> !    while True: 
> !        instr = f.read(bufsiz)
> !        if not instr:
> !            # End of file 
> !            break 
> !        splitstr = instr.split(line_end)
> !        if splitstr[-1]:
> !            # last piece not terminated
> !            if retain:
> !                splitstr[0] = retain + splitstr[0]
> !            retain = splitstr.pop()
> !        else:
> !            if retain:
> !                splitstr[0] = retain + splitstr[0]
> !                retain = ''
> !            del splitstr[-1]
> !        for element in splitstr: 
> !            yield element 
> !    if retain:
> !        yield retain
> 

I think this is a definite improvement... especially putting the buffer size
and line terminators as optional arguments, and handling empty files. I think,
however that the if splitstr[-1]: ... else: ... clauses aren't necessary, so I
would probably reduce it to this:

!def readweird(f, line_end='\0', bufsiz=8192):
!    retain = ''
!    while True:
!        instr = f.read(bufsiz)
!        if not instr:
!            # End of file
!            break
!        splitstr = instr.split(line_end)
!        if retain:
!            splitstr[0] = retain + splitstr[0]
!        retain = splitstr.pop()
!        for element in splitstr:
!            yield element
!    if retain:
!        yield retain 

Popping off that last member and then iterating over the rest of the list as
you suggested is so much more efficient, and it looks a lot better. 

Chris


From tim.golden at viacom-outdoor.co.uk  Tue Feb  8 09:09:27 2005
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 8 Feb 2005 14:09:27 -0000 
Subject: re-entrancy question
Message-ID: <9A28C052FF32734DACB0A288A3533991035A6F@vogbs009.gb.vo.local>

[dial#####$$NOSPAM##$#$##@gmail.com]
| 
| Tim Golden <tim.golden at viacom-outdoor.co.uk> wrote:
| 
| > Now *where* is there any mention of Twisted, either in the original
| > post or in my reply? As I read it, the OP is doing something which
| 
| Ya sorry. I thought this was crossposted but the OP posted 2 different
| emails to both python-list and twisted-python ML. This very 
| same message
| was posted on the twisted mailing list.
| 
| The answer anyway was already given on the other list: there are no
| re-entrancy problems :).
| 
| -- 
| Valentino Volonghi aka Dialtone

Ah, OK. I thought it was a bit bizarre.

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
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From mefjr75 at hotmail.com  Sun Feb  6 00:08:46 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 5 Feb 2005 21:08:46 -0800
Subject: CGI POST problem was: How to read POSTed data
In-Reply-To: <dMydnSAsTcgE2JjfRVn-oQ@rogers.com>
References: <mailman.1980.1107622913.22381.python-list@python.org>
	<dMydnSAsTcgE2JjfRVn-oQ@rogers.com>
Message-ID: <1107666525.996901.30980@l41g2000cwc.googlegroups.com>

Dan Perl wrote:
> I am piggybacking on Hakan's original posting because I am addressing
the
> same group of people (those with good knowledge in the standard web
> programming modules), on a related topic.  However, my question is
> independent of Hakan's.
>
> I have trouble getting a simple CGI script to work because it gets an
empty
> cgi.FieldStorage form.  I have looked into and tried to debug the
internals
> of the standard modules that are used but I cannot figure it out: how
is a
> multipart POST request parsed by CGIHTTPServer?  BTW, I am using
pyton 2.4.
>
> I found the parsing of the header in the rfc822 module used by
> BaseHTTPServer.BaseHTTPRequestHandler (through the mimetools module),
but
> that stops after the header (at the first empty line).  Where is the
parsing
> done for the POST data following the header?  I will appreciate any
pointers
> that will help me debug this problem.
>
> As a side note, I found other old reports of problems with cgi
handling POST
> requests, reports that don't seem to have had a resolution.  There is
even a
> bug reported just a few days ago (1112856) that is exactly about
multipart
> post requests.  If I understand the bug report correctly though, it
is only
> on the latest version in CVS and it states that what is in the 2.4
release
> works.  All this tells me that it could be a "fragile" part in the
standard
> library.  So it could be even a bug in the standard library, but for
now I
> am assuming that I'm doing something wrong.
>
> Thanks,
>
> Dan

Dan,
I was wondering how you were coming with your project.
I had wondered if i had missed something going the CherryPy route
instead of CGI. Now I see that you have had a bit of a snag , sorry to
hear that.
I am glad you are at least learning new things, 'cause if you had used
CherryPy2 you would have be done by now :P
M.E.Farmer



From mep_ at 163.com  Sat Feb 12 07:23:26 2005
From: mep_ at 163.com (mep)
Date: Sat, 12 Feb 2005 20:23:26 +0800
Subject: ActivePython 2.3.5.236 and ActivePython 2.4.0.244 are available
References: <mailman.2356.1108082006.22381.python-list@python.org><3736boF594g0kU1@individual.net>
	<mailman.2408.1108145312.22381.python-list@python.org>
Message-ID: <376atqF57u1p3U1@individual.net>

Got it. Thanks.I'm just curious.:)


"Trent Mick" <trentm at ActiveState.com> wrote in message
news:mailman.2408.1108145312.22381.python-list at python.org...
> mep wrote:
> > ActivePython-2.4.0-243-win32-ix86.msi : 29M
> > ActivePython-2.4.0-244-win32-ix86.msi : 18M
> > What make so much difference of the size of them, which distinct  monir
> > version number for 1 only.
> > Any explaination?
> >
>
>
> Yes, build 243 accidentally included some debug-build bits from
> the included PyWin32 build in the package. These debug bits are
> only intended for the separate Windows "debug" package. I fixed
> this for build 244.
>
> $ diff -qr ActivePython-2.4.0-243-win32-ix86
ActivePython-2.4.0-244-win32-ix86 | grep "Only in"
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/isapi:
PyISAPI_loader_d.dll
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/isapi:
PyISAPI_loader_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/pythonwin:
dde_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/pythonwin:
dde_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/pythonwin:
Pythonwin_d.exe
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/pythonwin:
Pythonwin_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/pythonwin:
scintilla_d.dll
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/pythonwin:
win32ui_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/pythonwin:
win32ui_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/pythonwin:
win32uiole_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/pythonwin:
win32uiole_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
dbi_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
dbi_d.pyd
> Only in
ActivePython-2.4.0-244-win32-ix86/INSTALLDIR/Lib/site-packages/win32/Demos:
BackupRead_BackupWrite.py
> Only in
ActivePython-2.4.0-244-win32-ix86/INSTALLDIR/Lib/site-packages/win32/Demos:
BackupSeek_streamheaders.py
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32/libs:
pywintypes_d.lib
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
mmapfile_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
mmapfile_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
odbc_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
odbc_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
perfmondata_d.dll
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
perfmondata_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
perfmon_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
perfmon_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
pythonservice_d.exe
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
pythonservice_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32/scripts
: setup_d.py
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
servicemanager_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
servicemanager_d.pyd
> Only in
ActivePython-2.4.0-244-win32-ix86/INSTALLDIR/Lib/site-packages/win32/test:
test_win32event.py
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
timer_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
timer_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win2kras_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win2kras_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32api_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32api_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32clipboard_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32clipboard_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32event_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32event_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32evtlog_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32evtlog_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32file_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32file_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32gui_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32gui_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32help_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32help_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32inet_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32inet_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32lz_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32lz_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32net_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32net_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32pdh_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32pdh_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32pipe_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32pipe_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32popenWin9x_d.exe
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32popenWin9x_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32print_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32print_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32process_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32process_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32ras_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32ras_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32security_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32security_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32service_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32service_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32trace_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32trace_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32wnet_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
win32wnet_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
winxpgui_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
winxpgui_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
_winxptheme_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32:
_winxptheme_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32com/libs
: pythoncom_d.lib
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/a
dsi: adsi_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/a
dsi: adsi_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/a
xcontrol: axcontrol_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/a
xcontrol: axcontrol_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/a
xdebug: axdebug_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/a
xdebug: axdebug_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/a
xscript: axscript_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/a
xscript: axscript_d.pyd
> Only in
ActivePython-2.4.0-244-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext:
directsound
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/i
filter: ifilter_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/i
filter: ifilter_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/i
nternet: internet_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/i
nternet: internet_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/m
api: mapi_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/m
api: mapi_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/s
hell: shell_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/s
hell: shell_d.pyd
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/t
askscheduler: taskscheduler_d.pdb
> Only in
ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/t
askscheduler: taskscheduler_d.pyd
> Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR: pythoncom24_d.dll
> Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR: pywintypes24_d.dll
> Only in ActivePython-2.4.0-243-win32-ix86/SystemFolder: pythoncom24_d.pdb
> Only in ActivePython-2.4.0-243-win32-ix86/SystemFolder: pywintypes24_d.pdb
>
>
>
> Cheers,
> Trent
>
> -- 
> Trent Mick
> trentm at activestate.com




From deetsNOSPAM at web.de  Fri Feb 11 09:33:15 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 11 Feb 2005 15:33:15 +0100
Subject: PyQt documentation
References: <1108088253.552834.44690@z14g2000cwz.googlegroups.com>
	<373it0F4uglf9U1@individual.net>
	<1108131643.216301.92510@o13g2000cwo.googlegroups.com>
Message-ID: <373u0qF58g57fU1@individual.net>

> The point is that if someone is familiar just to Python and not Qt, or
> the reverse, familiar to Qt and not to Python, it is difficult to see
> the *little* details of implementation.
> 
> I say this because I am familiar to Qt and not much to Python, and
> there are simple little mistake I do, that could be avoided if a simple
> example explained it. And a searchable API with examples would be
> perfect for rapid development.
> 
> Think about more *new* people using PyQt. I think PyQt if a great
> (actually the gratest ever, IMO) development "enviroment" and as more
> people use it, better it gets.
> 
> Thats the reason I want to know if there is a "Qtdoc-like" PyQt doc. If
> it does not exists, let's make it :)
> 
> Wanna join?

No. I did do some heavy qt development the last fall, and I never ran into
troubles because of lack of documentation. So at least for me, there is no
need for such a kind of documentation.

Above that I think that your desire for that docs stems from the need for
getting into pythonesque programming whilst developing a qt-app, I have to
say that I don't think that that's a too viable approach in general. Think
of trying to learn C++ using Qt. It's hard enough to grasp the gist of the
language itself - let alone the complications a elaborated - and in this
case even with special preprocessors equipped - library as qt. 

So maybe a better way for you would be to learn python by its own, then
trying to use it in conjunction with qt. 

Apart from that, I personally found that nearly _no_ python specific stuff
was necessary for my doings - at least out of my head I can't come up with
an example, except name clashes (exec renamed to exec_loop, as its a
keyword in python). All I had to do to make e.g. examples given in C++ work
was to strip curly braces and type declarations. So again: I don't see the
need for that doc. But that's IMHO, of course.

-- 
Regards,

Diez B. Roggisch


From mhartl at post.harvard.edu  Mon Feb 21 16:30:22 2005
From: mhartl at post.harvard.edu (Michael Hartl)
Date: 21 Feb 2005 13:30:22 -0800
Subject: Tuple index
References: <cvbcc6$b5f$1@news.netins.net>
	<1108951559.490554.305310@l41g2000cwc.googlegroups.com>
	<cvdian$ejs$1@news.netins.net>
Message-ID: <1109021422.351702.296640@o13g2000cwo.googlegroups.com>

I actually find it strange that tuples don't have an index function,
since finding the index doesn't involve any mutation.  Anyone know why
Python doesn't allow a statement like t.index('foo')?

In any case, you can use the index method of list objects if you
convert your tuple to a list first:

>>> t = ("fred", "barney", "foo")
>>> list(t).index("foo")
2
>>> def index(a_tuple, element):
...     return list(a_tuple).index(element)
...
>>> t[index(t, "foo")]
'foo'

(By the way, 'tuple' is a Python built-in type, so it's probably best
to avoid using it as a variable name.)


Michael

--
Michael D. Hartl, Ph.D.
CTO, Quark Sports LLC
http://quarksports.com/



From christiancoder at gmail.com  Fri Feb  4 23:21:07 2005
From: christiancoder at gmail.com (Grover)
Date: 4 Feb 2005 20:21:07 -0800
Subject: dynamic modules
Message-ID: <1107577267.475300.204060@f14g2000cwb.googlegroups.com>

What is the best way to add a modules loaded with __import__() to the
global namespace? Example:

  foo = __import__( 'foo', globals(), locals(), ['*'] )
  
PS: what exactly are the parameters globals and locals used for?



From tom.willis at gmail.com  Thu Feb 24 17:12:14 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Thu, 24 Feb 2005 17:12:14 -0500
Subject: Interesting decorator use.
In-Reply-To: <M5adncYw-5gT04PfRVn-ug@comcast.com>
References: <421e2398@nntp0.pdx.net>
	<mailman.3017.1109277781.22381.python-list@python.org>
	<M5adncYw-5gT04PfRVn-ug@comcast.com>
Message-ID: <b54d048905022414129645ab7@mail.gmail.com>

On Thu, 24 Feb 2005 15:00:46 -0700, Steven Bethard
<steven.bethard at gmail.com> wrote:
> Tom Willis wrote:
> > Question on decorators in general. Can you parameterize those?
> >
> > If I wanted to something and after the function call for example, I
> > would expect something like this would work.
> >
> > def prepostdecorator(function,pre,post):
> >     def wrapper(*args,**kwargs):
> >         pre()
> >         result =  function(*args,**kwargs)
> >         post()
> >         return result
> >     return wrapper
> >
> > def dopre():
> >     print "call pre"
> >
> > def dopost():
> >     print "call post"
> >
> > @prepostdecorator(pre,post)
> > def sayhello(Name):
> >     print "Hey %s, nice to meet you" % Name
> >
> > #sayhello = prepostdecorator(sayhello,dopre,dopost)
> >
> > if __name__=="__main__":
> >     sayhello("Dude")
> >
> > but I get ...
> > TypeError: prepostdecorator() takes exactly 3 arguments (2 given)
> 
> You get this TypeError for the same reason that I get the following
> TypeError:
> 
> py> def prepostdecorator(function, pre, post):
> ...     pass
> ...
> py> prepostdecorator(1, 2)
> Traceback (most recent call last):
>    File "<interactive input>", line 1, in ?
> TypeError: prepostdecorator() takes exactly 3 arguments (2 given)
> 
> The expression after @ is a _normal Python expression_.  So since you
> couldn't call prepostdecorator with 2 arguments in any other situation,
> you still can't.
> 
> If you want to call prepostdecorator with 2 arguments, you need to write
> it this way.  A few options:
> 
> (1) Use nested functions:
> 
> py> def prepostdecorator(pre,post):
> ...     def decorator(function):
> ...         def wrapper(*args,**kwargs):
> ...             pre()
> ...             result =  function(*args,**kwargs)
> ...             post()
> ...             return result
> ...         return wrapper
> ...     return decorator
> ...
> py> @prepostdecorator(dopre, dopost)
> ... def sayhello(name):
> ...     print "Hey %s, nice to meet you" % name
> ...
> py> sayhello('Tom')
> call pre
> Hey Tom, nice to meet you
> call post
> 
> (2) Use functional.partial (PEP 309[1])
> 
> py> def prepostdecorator(pre, post, function):
> ...     def wrapper(*args,**kwargs):
> ...         pre()
> ...         result =  function(*args,**kwargs)
> ...         post()
> ...         return result
> ...     return wrapper
> ...
> py> @partial(prepostdecorator, dopre, dopost)
> ... def sayhello(name):
> ...     print "Hey %s, nice to meet you" % name
> ...
> py> sayhello('Tom')
> call pre
> Hey Tom, nice to meet you
> call post
> 
> (3) Use a class:
> 
> py> class prepostdecorator(object):
> ...     def __init__(self, pre, post):
> ...         self.pre, self.post = pre, post
> ...     def __call__(self, function):
> ...         def wrapper(*args,**kwargs):
> ...             self.pre()
> ...             result = self.function(*args,**kwargs)
> ...             self.post()
> ...             return result
> ...         return wrapper
> py> @prepostdecorator(dopre, dopost)
> ... def sayhello(name):
> ...     print "Hey %s, nice to meet you" % name
> ...
> py> sayhello('Tom')
> call pre
> Hey Tom, nice to meet you
> call post
> 
> Note that in all of the above cases, the result of evaluating the
> expression after the @ is a callable object that takes _exactly one_
> argument, the function to be decorated.
> 
> HTH,
> 
> STeVe
> 
> [1] http://www.python.org/peps/pep-0309.html
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
Wow thanks for the explanation!! Some of it is a bit mind bending to
me at the moment , but I'm going to mess with it a bit.



-- 
Thomas G. Willis
http://paperbackmusic.net


From danperl at rogers.com  Sat Feb  5 17:15:52 2005
From: danperl at rogers.com (Dan Perl)
Date: Sat, 5 Feb 2005 17:15:52 -0500
Subject: CGI POST problem was: How to read POSTed data
References: <mailman.1980.1107622913.22381.python-list@python.org>
Message-ID: <dMydnSAsTcgE2JjfRVn-oQ@rogers.com>

I am piggybacking on Hakan's original posting because I am addressing the 
same group of people (those with good knowledge in the standard web 
programming modules), on a related topic.  However, my question is 
independent of Hakan's.

I have trouble getting a simple CGI script to work because it gets an empty 
cgi.FieldStorage form.  I have looked into and tried to debug the internals 
of the standard modules that are used but I cannot figure it out: how is a 
multipart POST request parsed by CGIHTTPServer?  BTW, I am using pyton 2.4.

I found the parsing of the header in the rfc822 module used by 
BaseHTTPServer.BaseHTTPRequestHandler (through the mimetools module), but 
that stops after the header (at the first empty line).  Where is the parsing 
done for the POST data following the header?  I will appreciate any pointers 
that will help me debug this problem.

As a side note, I found other old reports of problems with cgi handling POST 
requests, reports that don't seem to have had a resolution.  There is even a 
bug reported just a few days ago (1112856) that is exactly about multipart 
post requests.  If I understand the bug report correctly though, it is only 
on the latest version in CVS and it states that what is in the 2.4 release 
works.  All this tells me that it could be a "fragile" part in the standard 
library.  So it could be even a bug in the standard library, but for now I 
am assuming that I'm doing something wrong.

Thanks,

Dan 




From db3l at fitlinxx.com  Thu Feb  3 12:05:20 2005
From: db3l at fitlinxx.com (David Bolen)
Date: 03 Feb 2005 12:05:20 -0500
Subject: Redirecting stdout/err under win32 platform
References: <41fbd6b5$0$6098$626a14ce@news.free.fr>
	<1107149696.809645.56180@z14g2000cwz.googlegroups.com>
	<42000256$0$513$626a14ce@news.free.fr>
	<4201cf22$0$26608$636a15ce@news.free.fr>
Message-ID: <u7jlpbmlr.fsf@fitlinxx.com>

Pierre Barbier de Reuille <pierre.barbier at cirad.fr> writes:

> AFAIK, there is no working bidirectionnal pipes on Windows ! The
> functions exists in order for them to claim being POSIX, but they're
> not working properly. (...)

Can you clarify what you believe doesn't work properly?  The os.popen*
functions under Windows use native CreateProcess calls to create the
child process and connect stdin/out/err handles to that child process,
so should behave properly.  (Subject of course to the same risk of
deadlocks and what not due to buffering or queued up data that any
system would have with these calls)

-- David


From mahs at telcopartners.com  Fri Feb 25 13:03:20 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 25 Feb 2005 10:03:20 -0800
Subject: accessor/mutator functions
In-Reply-To: <1109346895.024524.77080@g14g2000cwa.googlegroups.com>
References: <1109315698.002207.245690@g14g2000cwa.googlegroups.com>	<mailman.3040.1109321620.22381.python-list@python.org>
	<1109346895.024524.77080@g14g2000cwa.googlegroups.com>
Message-ID: <cvnp1f$lbq$1@sea.gmane.org>

mirandacascade at yahoo.com wrote:
> If the class had two attributes--x and y--would the code look like
> something lik this:
> 
>  class C(object):
>         def __init__(self):
>             self.__x = 0
>             self.__y = 0
>         def getx(self):
>             return self.__x
>         def setx(self, x):
>             if x < 0: x = 0
>             self.__x = x
>         def gety(self):
>             return self.__y
>         def sety(self, y):
>             if y < 0: y = 0
>             self.__y = y
>         x = property(getx, setx)
>         y = property(gety, sety)

It could do - that works.  One feature of this solution is that it leaves the 
accessor/mutator functions in the namespace.  That may be a good or a bad thing. 
  If bad, you could simply delete them after the property call (which is 
probably better written as close as possible to the functions)

i.e., class C(object):
    def __init__(self):
        self.__x = 0
        self.__y = 0
    def getx(self):
        return self.__x
    def setx(self, x):
        if x < 0: x = 0
        self.__x = x
    x = property(getx, setx)
    del getx, setx
    def gety(self):
        return self.__y
    def sety(self, y):
        if y < 0: y = 0
        self.__y = y
    y = property(gety, sety)
    del gety, sety

There are also recipes in the cookbook for defining property "suites" more elegantly

Note, that it is also easy to "roll your own" descriptor, which may be 
worthwhile if you have a lot of similar properties, for example (not tested 
beyond what you see):

from weakref import WeakKeyDictionary

class Property(object):
     def __init__(self, adapter):
         """adapter is a single argument function that will be
             applied to the value before setting it"""
         self.objdict = WeakKeyDictionary()
         self.adapter = adapter
     def __get__(self, obj, cls):
         if isinstance(obj, cls):
             return self.objdict[obj]
         else:
             return self
     def __set__(self, obj, value):
         self.objdict[obj] = self.adapter(value)

class C(object):
     x = Property(lambda val: max(val, 0))
     y = Property(lambda val: val%2)
     z = Property(abs)

  >>> c= C()
  >>> c.x = -3
  >>> c.x
0
  >>> c.y = -3
  >>> c.y
1
  >>> c.z = -3
  >>> c.z
3
  >>>


Michael



From ncoghlan at iinet.net.au  Thu Feb 10 10:09:15 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 11 Feb 2005 01:09:15 +1000
Subject: variable declaration
In-Reply-To: <slrnd0mo2u.26q.apardon@rcpc42.vub.ac.be>
References: <4202A022.3050209@netscape.net>	<MSGID_2=3A5025=2F3.131_4204b0a9@fidonet.org>	<mailman.1978.1107622451.22381.python-list@python.org>	<slrnd0epjg.26q.apardon@rcpc42.vub.ac.be>	<mailman.2069.1107783321.22381.python-list@python.org>	<slrnd0esqn.26q.apardon@rcpc42.vub.ac.be>	<mailman.2152.1107854937.22381.python-list@python.org>	<slrnd0h3e9.26q.apardon@rcpc42.vub.ac.be>	<mailman.2156.1107859510.22381.python-list@python.org>	<slrnd0h9r8.26q.apardon@rcpc42.vub.ac.be>	<mailman.2239.1107951749.22381.python-list@python.org>	<slrnd0mg7t.26q.apardon@rcpc42.vub.ac.be>	<mailman.2304.1108039814.22381.python-list@python.org>
	<slrnd0mo2u.26q.apardon@rcpc42.vub.ac.be>
Message-ID: <420B791B.4090500@iinet.net.au>

Antoon Pardon wrote:
> I don't think that would be a big issue. Python uses '=' also
> differently from a number of languages. My preference would
> currently be for ':=' because I have the impression that if
> you don't leave spaces the period in '.=' tends to be obscured.
> 
>   x.=42   vs    x:=42
> 
> seems a clear win for the second IMO.
> 

I'm forced to agree. So I'll use the latter syntax if I end up writing anything 
further about rebinding :)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From olsongt at verizon.net  Mon Feb 28 22:15:39 2005
From: olsongt at verizon.net (Grant Olson)
Date: Mon, 28 Feb 2005 22:15:39 -0500
Subject: [ANN] pyasm 0.1 - x86 assembler for Python
Message-ID: <0ICN00A8LL7M3011@vms046.mailsrvcs.net>

pyasm 0.1 - x86 assembler for Python

This release is for early adopters only.  It is not properly packaged and
doesn't have very good documentation.  It is however a functional assembler
that should be of interest to some people.

Current output targets include Windows-style COFF files that can be
subsequently linked to produce executables, and more interestingly output
can target memory in an existing Python process and binding within a Python
namespace.  That's right, you can now generate dynamic inline assembly
straight from Python!  A simple hello world function implementation is
listed at the end of this message.


The files test\test_object_creation.py and test\test_winmem.py in the
distribution probably give the best examples of usage.

Future plans include targeting ELF file formats and Linux memory at runtime,
and of course real documentation.

The package is available at:
    http://mysite.verizon.net/olsongt/pyasm-0.1.zip

Enjoy,

-Grant

#############################################
# PYTHON HELLO WORLD IN ASSEMBLY
#############################################

import pyasm.winmem
from pyasm.x86asm import assembler, CDECL
from pyasm.x86cpToMemory import CpToMemory

nonePointer = id(None)


a = assembler()
a.ADStr("hello_world", "Hello world!\n\0")
a.AP("test_print", CDECL)
a.AddLocal("self")
a.AddLocal("args")
#a.AI("INT 3")
a.AI("PUSH hello_world")
a.AI("CALL PySys_WriteStdout")
#a.AI("INT 3")
a.AI("MOV EAX,%s" % id(None))
a.AI("ADD [EAX],0x1") #refcount manipulation
a.EP()


mem = CpToMemory(a.Compile(),pyasm.winmem)
mem.MakeMemory()
mem.BindPythonFunctions(globals())

test_print() # calls the assembly function



From Dennis.Benzinger at gmx.net  Tue Feb  8 17:59:54 2005
From: Dennis.Benzinger at gmx.net (Dennis Benzinger)
Date: Tue, 08 Feb 2005 23:59:54 +0100
Subject: Downloadable python-dev archive February 2005 contains only one
	mail?
Message-ID: <4209446a$1@news.uni-ulm.de>

Hi!

I just downloaded the archive of the python-dev mailing list for
February 2005 from

http://mail.python.org/pipermail/python-dev/2005-February.txt.gz

and there is only one mail in it.

Did anyone have this problem, too?

Bye,
Dennis


From jjl at pobox.com  Mon Feb 21 19:13:23 2005
From: jjl at pobox.com (John J. Lee)
Date: 22 Feb 2005 00:13:23 +0000
Subject: recommended way of generating HTML from Python
References: <1108889625.068929.88890@z14g2000cwz.googlegroups.com>
	<4218f506$0$1220$8fcfb975@news.wanadoo.fr>
	<1108965380.059565.200110@g14g2000cwa.googlegroups.com>
	<4219d2a5$1_1@newspeer2.tds.net>
	<mailman.2893.1108997539.22381.python-list@python.org>
Message-ID: <87mztxa1uk.fsf@pobox.com>

Matt Goodall <matt at pollenation.net> writes:
[...]
> Agreed. Although I would go further and say that it's important to
> choose a templating system that allows the Python developer to annotate
> XHTML templates using **valid XML**, i.e. no "for x in y" loops, no "if
> foo" conditionals, no "i = 0" variable setting, no expression
> evaluations, etc.
[...]

Why does use of a templating system whose documemts are valid XML
imply no loops, conditionals, expression evaluation etc.?

Or are you just talking about particular (non-XML) syntaxes for these
constructs?


John


From tdelaney at avaya.com  Tue Feb  1 17:27:59 2005
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Wed, 2 Feb 2005 09:27:59 +1100
Subject: Next step after pychecker
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE02520306@au3010avexu1.global.avaya.com>

huy wrote:

> do not yet have good coverage. TDD is a quite hard to practice as a
> beginner. 

It's even harder to bolt onto an existing codebase :(

Tim Delaney


From guettli at thomas-guettler.de  Thu Feb  3 06:35:40 2005
From: guettli at thomas-guettler.de (Thomas Guettler)
Date: Thu, 03 Feb 2005 12:35:40 +0100
Subject: Popularizing SimpleHTTPServer and CGIHTTPServer
References: <1107412654.121488.157070@c13g2000cwb.googlegroups.com>
Message-ID: <pan.2005.02.03.11.35.39.893213@thomas-guettler.de>

Am Wed, 02 Feb 2005 22:37:34 -0800 schrieb Michele Simionato:

> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/365606
>The standard library modules SimpleHTTPServer and CGIHTTPServer are
>extremely
>useful, but the documentation hides their virtues. I hope to improve the
>situation with this recipe.

Hi,

I used SimpleHTTPServer to serve debian packages you
get with apt-get. Unfortunately this did not work.
I recieved a lot of "connection reset by peer".

See:
http://mail.python.org/pipermail/python-list/2004-October/244173.html

Have other people this problem, too?
I got no response.

 Thomas

-- 
Thomas G?ttler, http://www.thomas-guettler.de/




From mmiller at tx3 dot com  Tue Feb  1 07:03:31 2005
From: mmiller at tx3 dot com (mmiller at tx3 dot com)
Date: Tue, 01 Feb 2005 04:03:31 -0800
Subject: "pickle" vs. f.write()
In-Reply-To: <mailman.1393.1106776145.22381.python-list@python.org>
References: <opsk7f4zcua89mar@condor>
	<mailman.1393.1106776145.22381.python-list@python.org>
Message-ID: <10vus0jskgpll18@corp.supernews.com>

On 1/26/05 at 1:48 pm, Terry Reedy wrote:
> For basic builtin objects, repr(ob) generally produces a string that when 
> eval()ed will recreate the object.  IE
> eval(repr(ob) == ob # sometimes

I've found extending this property to your own classes often fairly easy
to implement (and useful). For example:

> class person:
>     def __init__(self, name="", age=0, friends=None, comment=""):
>         if friends is None:
>             friends = []
>         self.name, self.age, self.friends, self.comment = name, age, friends, comment
> 
>     def __repr__(self):
>         return ("person(" + repr(self.name) + ", " + repr(self.age) + ", " +
>                 repr(self.friends) +  ", " + repr(self.comment) + ")")
> 
> me = person()
> 
> print "me =", repr(me)

Which produces the following output:
   me = person('', 0, [], '')


In addition, the following constructs are possible:

> family = [
>     person("Martin", 50, ["Matt"], "eldest son"),
>     person("Matt", 43, ["Martin"], "youngest son"),
>     person("Merry", 72, ["Martin", "Matt"], "mother"),
>     person("Luther", 82, ["Merry"], "father")
> ]
> 
> print "family =", repr(family)

Which output the following:
family = [person('Martin', 50, [], 'eldest son'), person('Matt', 43,
['Martin'], 'youngest son'), person('Merry', 72, ['Martin', 'Matt'],
'mother'), person('Luther', 82, ['Merry'], 'father')]

Basically this approach allows you to store your data in Python source
files -- which you can then import or execfile. The files can also
contain comments and are relatively easy to edit by hand. In addition
they're portable.

Best,
Martin


From caleb1 at telkomsa.net  Wed Feb  9 23:58:45 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Wed, 09 Feb 2005 23:58:45 -0500
Subject: Python and version control
References: <XNrOd.1657$Mw3.72@amstwist00>
Message-ID: <opslytf7tb1js0xs@news.telkomsa.net>

Carl

> What is the ultimate version control tool for Python if you are working  
> in a
> Windows environment?

We use JEDI VCS (open source, free).  To be fair, JEDI VCS actually  
integrates into the Delphi IDE, which is what we use mostly.  However, the  
standard installation also installs a standalone client (as opposed to the  
IDE client) that you can use for anything.  Actually, we use the  
standalone client for latex documentation, so I know it works well for  
non-Delphi stuff.

The JEDI VCS server download (now) contains an embedded firebird database,  
which makes setting up the whole server thing a total breeze.  I just did  
it a few days ago, took all of 2 minutes to set up the server and start  
the service (and send a mail out to everyone asking them to install the  
new client).  Firebird is based on Interbase, if that means anything to  
you.

You get full access controls (check-in/check-out), version history,  
rollbacks, milestones, integrated diff, check-in requests, per-file  
check-in/check-out comments, automated database backup, and so on.  I  
cannot recommend it highly enough actually :)  Though we use it all the  
time, we hardly think about it much, which is a really great feature for  
this type of thing.

Of course, I have only used JEDI VCS, so I have nothing to compare it to:  
ymmv.

keep well
Caleb


From ola.natvig at infosense.no  Wed Feb  2 10:11:38 2005
From: ola.natvig at infosense.no (Ola Natvig)
Date: Wed, 02 Feb 2005 16:11:38 +0100
Subject: new style exception handleing
Message-ID: <a677d2-h8g.ln1@pluto.i.infosense.no>

Hi all

Does anybody know why it's not possible to raise Exceptions which are 
types (new-style-classes). I know all standard exceptions are classic 
classes, but if you make a custom exception which both inherits from a 
exception class and a new-style one the it causes a type error when raised.

 >>> class b(Exception, object): pass

 >>> raise b

Traceback (most recent call last):
   File "<pyshell#2>", line 1, in -toplevel-
     raise b
TypeError: exceptions must be classes, instances, or strings 
(deprecated), not type

This is weird, I think. Are there any issues about raising types as 
exceptions that I can't think of ?


-- 
--------------------------------------
  Ola Natvig <ola.natvig at infosense.no>
  infoSense AS / development


From steven.bethard at gmail.com  Thu Feb  3 12:47:10 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 03 Feb 2005 10:47:10 -0700
Subject: Easy Q: dealing with object type
In-Reply-To: <just-A7B5B3.12500903022005@news1.news.xs4all.nl>
References: <420181b1$1@nntp.zianet.com>
	<1107396669.028096.301290@g14g2000cwa.googlegroups.com>
	<42019545$1@nntp.zianet.com> <SJmdnddykYoAOpzfRVn-hA@comcast.com>
	<just-A7B5B3.12500903022005@news1.news.xs4all.nl>
Message-ID: <nrWdnRI9Q6EB_p_fRVn-jw@comcast.com>

Just wrote:
> In article <SJmdnddykYoAOpzfRVn-hA at comcast.com>,
>  Steven Bethard <steven.bethard at gmail.com> wrote:
>>
>>py> class A:
>>...     pass
>>...
>>py> class B:
>>...     pass
>>...
>>py> a = A()
>>py> a.__class__ == A
>>True
>>py> a.__class__ == B
>>False
> 
> Uh, isinstance(a, A) works for both new-style and old-style classes. 
> Heck, isinstance() even works in Python 1.5.2...

The OP asked "Given some object ... how do you test its type?".  I 
interpreted this as a strict check, not a transitive check:

py> class A:
...     pass
...
py> class B(A):
...     pass
...
py> b = B()
py> isinstance(b, B)
True
py> isinstance(b, A)
True
py> b.__class__ == B
True
py> b.__class__ == A
False

Of course, if the OP doesn't need the strict check here, isinstance is, 
of course, the right answer.

STeve


From phark52 at yahoo.com  Sat Feb 26 00:40:30 2005
From: phark52 at yahoo.com (Artificial Life)
Date: Sat, 26 Feb 2005 05:40:30 GMT
Subject: sockets question
References: <mailman.3084.1109396160.22381.python-list@python.org>
Message-ID: <pan.2005.02.26.05.48.07.356084@yahoo.com>

On Sat, 26 Feb 2005 00:35:57 -0500, Mohammed Smadi wrote:

> hi;
> 
> i have the following piece of code:
> =============
> s = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
> s.bind(("",port))
> s.sendto(data,(MY_GW,port)) 
> data = s.recvfrom(1024)  
> ============
> 
> data contains some instructions which i am sending to MY_GW.  If the 
> reply arrives from the MY_GW quickly then things fine, otherwise the 
> program is going to freeze waiting for the reply.  I want to do the 
> following:
> 
> 1- Be able to impose a timeout after which i want to stop executing 
> the s.recvfrom statement.
> 
> rgds;
> m.smadi


That happens because those functions 'block.' Search for Non-blocking
sockets, and the 'select' module



From michael at stroeder.com  Tue Feb  8 12:20:38 2005
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Tue, 08 Feb 2005 18:20:38 +0100
Subject: User Identification
In-Reply-To: <mailman.2175.1107868710.22381.python-list@python.org>
References: <slrnd0hc3d.1pq.rparnes@debian.localdomain>
	<mailman.2175.1107868710.22381.python-list@python.org>
Message-ID: <609nd2-947.ln1@nb2.stroeder.com>

Gerhard Haering wrote:
> 
> os.getuid() will give you the user id, but I don't know if Python has
> methods to look up more information from that from /etc/passwd or
> whereever from.

 >>> import pwd,os
 >>> pwd.getpwuid(os.getuid())
('michael', 'x', 1234, 100, 'Michael Str\xf6der', '/home/michael', 
'/bin/bash')
 >>>

Ciao, Michael.


From fowlertrainer at citromail.hu  Mon Feb  7 03:58:34 2005
From: fowlertrainer at citromail.hu (fowlertrainer at citromail.hu)
Date: Mon, 07 Feb 2005 09:58:34 +0100
Subject: SOS Win - How to save metafile as Bitmap ? 
Message-ID: <42072DBA.4020409@citromail.hu>

Hi !

My problem is that: I have a program that copy pictures from Notes NSF file.
The format is METAFILE or METAFILEPICT.

I can save these pictures with this code:

import win32api
import win32con
import win32gui
...
mode=0
if mode==0:
   import win32clipboard, win32con
   win32clipboard.OpenClipboard()
   try:
       if 
win32clipboard.IsClipboardFormatAvailable(win32con.CF_ENHMETAFILE):
          print "METAFILE"
          hdl=win32clipboard.GetClipboardData(win32con.CF_ENHMETAFILE)
          f=open('c:\\test.emf','wb')
          f.write(hdl)
          f.close()
   finally:
       win32clipboard.CloseClipboard()
...

But I need to convert them to BMP files.
I have wxPython, and PIL, and win32api ext.

wxPython have wxMetaFile class, but I cannot found it's import path. 
import ????
PIL have clipboard tool, but it is make wrong palette for these copies.

So what is the better, "simplier" (have the english a word like this ?) 
solution to my problem ?

Thanx for the quick help:
 ft

PS:
 Do not use outer program for convert it. I have it same program, but I 
want to do it in python !!!


From everettcc at hotmail.com  Tue Feb 15 15:57:35 2005
From: everettcc at hotmail.com (Chad Everett)
Date: Tue, 15 Feb 2005 14:57:35 -0600
Subject: Newbie help
References: <lvUPd.10137$pE1.923@bignews3.bellsouth.net>
	<1108352018.381002.167260@o13g2000cwo.googlegroups.com>
	<1108352379.334089.148510@f14g2000cwb.googlegroups.com>
Message-ID: <_itQd.523$lI2.348@bignews5.bellsouth.net>

I got it,  thanks for the help.

Chad

"Michael Hartl" <mhartl at post.harvard.edu> wrote in message 
news:1108352379.334089.148510 at f14g2000cwb.googlegroups.com...
> Sorry about the code: Google Groups screwed up the formatting, but I
> hope you get the picture.
> 




From martin at v.loewis.de  Tue Feb 22 21:10:44 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 23 Feb 2005 03:10:44 +0100
Subject: compatbility of .pyc files
In-Reply-To: <421BCED0.2070206@irl.cri.nz>
References: <421BCED0.2070206@irl.cri.nz>
Message-ID: <421be625$0$8764$9b622d9e@news.freenet.de>

Blair Hall wrote:
> Are the .pyc's usable without recompilation between 'minor'
> releases of the interpretter (e.g., 2.3.1 -> 2.3.2 -> etc)?

Yes.

> I presume that the .pyc's are NOT compatible
> across more major releases (e.g., 2.3.x -> 2.4.x)?

Correct.

> Is there a hard and fast rule about compatibility across
> releases that I can rely on?

Each Python version uses a "magic", as returned by
imp.get_magic(). Whenever that changes (and it will at
worst change between 2.x, 2.x+1), you need to recompile
the .pyc files.

If you pass it an "old" pyc file (i.e. one with an
incorrect magic), Python will silently ignore the .pyc
file, use the source, and attempt to regenerate the
.pyc file.

Regards,
Martin


From peter at engcorp.com  Sat Feb 26 12:33:56 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 26 Feb 2005 12:33:56 -0500
Subject: function expression with 2 arguments
In-Reply-To: <1109419984.213993.49280@f14g2000cwb.googlegroups.com>
References: <1109419984.213993.49280@f14g2000cwb.googlegroups.com>
Message-ID: <98ydnSp0COmeLr3fRVn-jQ@powergate.ca>

Xah Lee wrote:
> is there a way to write a expression of a function with more than 1
> argument?
> 
> e.g., i want a expression that's equivalent to
> 
> def f(x,y)
>   return x+y

Since assignment is a statement in Python, not an expression,
and since "def f" is an assignment that binds a function
object to the name "f", you can't do exactly what you've
asked for.

On the other hand, this should be about equivalent, though
it's not merely an expression:

f = lambda x, y: x + y


From ola.natvig at infosense.no  Tue Feb  1 04:19:41 2005
From: ola.natvig at infosense.no (Ola Natvig)
Date: Tue, 01 Feb 2005 10:19:41 +0100
Subject: find isset() php function equivalent in python
In-Reply-To: <41ff435f$0$18835$8fcfb975@news.wanadoo.fr>
References: <41ff435f$0$18835$8fcfb975@news.wanadoo.fr>
Message-ID: <c6u3d2-b0q.ln1@pluto.i.infosense.no>

Olivier Noblanc ATOUSOFT wrote:
> Hello
> 
> 
> What is the equivalent function of php isset() in python
> 
> Thank you very much.
> 
> olivier noblanc
> http://www.logiciel-erp.fr 
> 
> 

try:
	if variable:
		# isset
		pass
except NameError:
	# not set
	pass
	
could work...

-- 
--------------------------------------
  Ola Natvig <ola.natvig at infosense.no>
  infoSense AS / development


From apardon at forel.vub.ac.be  Mon Feb 21 06:47:24 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 21 Feb 2005 11:47:24 GMT
Subject: combining several lambda equations
References: <2ae25c6b.0502180224.3d6164a7@posting.google.com>
	<ALqdnSMoh__WuIvfRVn-vA@comcast.com>
Message-ID: <slrnd1jiib.jkb.apardon@rcpc42.vub.ac.be>

Op 2005-02-18, Steven Bethard schreef <steven.bethard at gmail.com>:
> Paddy McCarthy wrote:
>> x=lambda : A < B
>> y=lambda : C+6 >= 7
>>
> [snip]
>>
>> Z=lambda : (A<B) and (C+6>=7)
>
> See "Inappropriate use of Lambda" in
> http://www.python.org/moin/DubiousPython
>
> Perhaps your real example is different, but notice that
>      <name> = lambda <args>: <expr>
> is equivalent to
>      def <name>(<args>):
>          return <expr>
> except that the latter will give your function a useful name.  No reason 
> to use the *anonymous* function construct to create a *named* function.

So and if I have code like this:

f = lamda x:x 
for g in some_iter:
  f = compose(g,f)


Do you still think that one should use a named function in this case?

-- 
Antoon Pardon


From kashmira_v_phalak at yahoo.com  Tue Feb 22 02:38:07 2005
From: kashmira_v_phalak at yahoo.com (clementine)
Date: Tue, 22 Feb 2005 02:38:07 -0500
Subject: Problem with the sort() function
Message-ID: <64827323f7134aea810788b3ec6cf516@localhost.talkaboutprogramming.com>

Hi,

I have an array of arrays in the form of 
list = [[3,'fork',0.3,1],[2,'fork,0.1,2],[3,'exec',0.2,2]]

The in-built sort(),list.sort() sorts on the first element, if the first
elts are equal then it sorts on the second elt and so on...But i really
dont want to search on the second elt if the first elts are equal...the
1-D lists shud be left in the same position i.e. i want the sorted list to
be [[2,'fork',0.1,2],[3,'fork,0.3,1],[3,'exec',0.2,2]] and not
[[2,'fork',0.1,2],[3,'exec',0.2,2],[3,'fork,0.3,1]].

I tried the following code:

def mysort(x,y):
    return x[0]-y[0]

list.sort(mysort)

This somehow seems to work for a small subset of my input...but not for my
real input which has more than 2000 sub-lists(and so obviously i cant trace
each pass..). Can someone tell me what i'm missing?
 



From xnews2 at fredp.lautre.net  Fri Feb  4 06:45:31 2005
From: xnews2 at fredp.lautre.net (Fred Pacquier)
Date: 04 Feb 2005 11:45:31 GMT
Subject: advice needed for simple python web app
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
	<ctv48p$75$1@eeyore.INS.cwru.edu>
	<N86dnZ7k56I3gJ7fRVn-tg@rogers.com>
Message-ID: <Xns95F3815003EECPaCmAnRDLM@212.27.42.74>

"Dan Perl" <danperl at rogers.com> said :

> This is exactly the kind of summary that I think should be in a 
> WebProgrammingShootOut (see another one of my postings in this thread)
> but I failed to find such a summary.  Thanks, Brian!  Anyone can add
> to the list? 

I myself am also into (very) simple web apps and hence simple, easy-to-
learn web frameworks.

CherryPy is a very nice kit, still simple enough but already (IMO) 
somewhat on the powerful, batteries-included side for a beginner -- and, 
as you noted, a bit under-documented at the moment.

There are a couple of others that will get you started without too much 
effort (in part because simplicity is one of their design points) and 
without limiting you too much either : Karrigell by Pierre Quentel and 
Snakelets by Irmen de Jong.

They're somewhat similar in scope and concept : it will be mostly a 
matter of which one 'fits your brain' best. Myself I settled on 
Snakelets, not least because it has some of the better docs out there.
 
> BTW, there are other people who seem to have been also confused by the
> wide spectrum of choices for this problem: 

That's an old debate in the Python world, yes. The "one true way to do 
it" motto of the language itself doesn't apply to its web frameworks :)

See the recent "Ruby on Rails" threads for a discussion of whether this 
is good or bad...

-- 
YAFAP : http://www.multimania.com/fredp/


From ted.lilley at gmail.com  Sat Feb 19 23:26:46 2005
From: ted.lilley at gmail.com (Ted Lilley)
Date: 19 Feb 2005 20:26:46 -0800
Subject: lambda closure question
In-Reply-To: <42174213_1@newspeer2.tds.net>
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<42174213_1@newspeer2.tds.net>
Message-ID: <1108873606.272605.62700@g14g2000cwa.googlegroups.com>

I replied a few minutes ago thanking everyone for their pointers.  Very
interesting reading.  I don't see my post yet, so I do hope it comes
through.  I'm using a new newsreading service and don't yet have
confidence in it.

In any case, the addition of the default-setting argument in the lambda
works famously and is only a slight modification to my code.  While I
don't think it's particularly intuitive (I would hate to be a
hypothetical programmer trying to puzzle out what my code does), it
gets the job done and is a heck of a lot easier than attaching the list
of attributes manually as I would've done without Python's FP
capabilities.

Thanks again,

Ted



From steven.bethard at gmail.com  Mon Feb 28 02:09:22 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 28 Feb 2005 00:09:22 -0700
Subject: Working with dbase files
In-Reply-To: <7MyUd.73116$911.65438@fe2.texas.rr.com>
References: <7MyUd.73116$911.65438@fe2.texas.rr.com>
Message-ID: <9fGdnaMkM4YAXr_fRVn-pg@comcast.com>

Stan Cook wrote:
> Does anyone know how I can access and read data from a dbase (.dbf) file?

I know nothing about them, but Raymond Hettinger recently posted a 
recipe that I believe should help:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/362715

STeVe


From mjs7231 at gmail.com  Wed Feb 16 09:45:35 2005
From: mjs7231 at gmail.com (mjs7231)
Date: 16 Feb 2005 06:45:35 -0800
Subject: Getting milliseconds in Python
Message-ID: <1108565135.167562.196830@z14g2000cwz.googlegroups.com>

I am trying to record how long an operation takes, but can't seem to
find a function that will allow me to record the timestamp in
milliseconds, maybe I am looking in the wrong place?



From fredrik at pythonware.com  Fri Feb  4 14:54:03 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 4 Feb 2005 20:54:03 +0100
Subject: string issue
References: <cu0i3o$jc6$1@solaris.cc.vt.edu><36QMd.103084$Jk5.36127@lakeread01>
	<cu0j92$kf7$2@solaris.cc.vt.edu>
Message-ID: <cu0jqp$fs4$1@sea.gmane.org>

"rbt" <rbt at athop1.ath.vt.edu> wrote:

>> You are modifying the list as you iterate over it. Instead, iterate over a copy by using:
>>
>> for ip in ips[:]:
>>   ...
>>
>> regards
>>  Steve
>
> Very neat. That's a trick that everyone should know about.

I suppose that's why it's included in the Python tutorial:

http://docs.python.org/tut/node6.html#SECTION006200000000000000000

    It is not safe to modify the sequence being iterated over in the loop
    (this can only happen for mutable sequence types, such as lists). If
    you need to modify the list you are iterating over (for example, to
    duplicate selected items) you must iterate over a copy. The slice
    notation makes this particularly convenient:

    >>> for x in a[:]: # make a slice copy of the entire list
    ...    if len(x) > 6: a.insert(0, x)

(slice notation is explained in an earlier chapter)

</F> 





From noreply at python.org  Tue Feb 15 07:13:43 2005
From: noreply at python.org (Post Office)
Date: Tue, 15 Feb 2005 13:13:43 +0100
Subject: MDaemon Warning - virus found: Returned mail: Data format error
Message-ID: <20050215121501.9908B1E4009@bag.python.org>


******************************* WARNING ******************************
Este mensaje ha sido analizado por MDaemon AntiVirus y ha encontrado 
un fichero anexo(s) infectado(s).  Por favor revise el reporte de abajo.

Attachment                    Virus name               Action taken
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**********************************************************************


The original message was received at Tue, 15 Feb 2005 13:13:43 +0100 from python.org [76.252.144.148]

----- The following addresses had permanent fatal errors -----
<python-list at python.org>




From tundra at tundraware.com  Tue Feb  1 04:08:15 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 01 Feb 2005 04:08:15 EST
Subject: tkinter: Can You Underline More Than 1 Char In A Menu Title
In-Reply-To: <mailman.1681.1107242771.22381.python-list@python.org>
References: <d00nc2-ctm.ln1@eskimo.tundraware.com><056uv054s4ionvjt2ii8fcnm3hvcqqm8g2@4ax.com>	<eel3d2-ds3.ln1@eskimo.tundraware.com>
	<mailman.1681.1107242771.22381.python-list@python.org>
Message-ID: <83t3d2-sn6.ln1@eskimo.tundraware.com>

Fredrik Lundh wrote:
> Tim Daneliuk wrote:
> 
> 
>>>>However, I intend to actually have two separate keys invoke this menu
>>>>to have it behave differently in different circumstances.
>>>
>>>You can, of course, CHANGE the underlined character to match the
>>>circumstances.
>>
>>Yeah, I understand that ... what I want is two characters simulatenously
>>underlined ... oh well, another solution will be arranged...
> 
> 
> if you want a menu choice to have different behaviour depending on what
> key you use to invoke them, you should use two different choices.
> 
> </F> 
> 
> 
> 

That is my intention.  I have a menu that lists a set of regular expressions
available for a particular task.  However, the regex are applied in two
different ways for this task.  I want a common menu for displaying all
the choices, but two separate "Accelerator Keys" to invoke it, depending
on the desired application...

-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From mahs at telcopartners.com  Thu Feb 17 00:21:23 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 16 Feb 2005 21:21:23 -0800
Subject: Iterator / Iteratable confusion
In-Reply-To: <1108515242.4371.9.camel@localhost.localdomain>
References: <420a5c1e$0$21630$a1866201@visi.com>	<slrnd0q67t.52v.curty@einstein.electron.net>	<200502131848.03655.francis.girard@free.fr>	<200502131958.27410.francis.girard@free.fr><cuolu7$qv7$1@sea.gmane.org>	<cuooip$1pd$1@sea.gmane.org><curt3v$lmf$1@sea.gmane.org>	<cuthdk$dnq$1@sea.gmane.org>
	<cuu3p0$55n$1@sea.gmane.org>
	<1108515242.4371.9.camel@localhost.localdomain>
Message-ID: <cv19f8$sel$1@sea.gmane.org>

Adam DePrince wrote:


> How is a spencerator [an iterator that doesn't return itself unmodified on iter]
 > different than itertools.tee?
> 
Taking your question literally, it changes the behavior of an itertools.tee 
object 'tee', so that iter(tee) returns tee.__copy__(), rather than tee itself.

It was created for rhetorical purposes and has no known practical application.

Depending on your point of view it is evidence either for (a) why the iterator 
protocol must be strictly adhered to, or (b) that iterators and iterables cannot 
be disjoint sets.


Michael





From pekka.niiranen at wlanmail.com  Fri Feb 11 07:51:54 2005
From: pekka.niiranen at wlanmail.com (pekka niiranen)
Date: Fri, 11 Feb 2005 12:51:54 GMT
Subject: Is this a bug? BOM decoded with UTF8
In-Reply-To: <420bc317$0$4925$9b622d9e@news.freenet.de>
References: <epMOd.357$7m.215@read3.inet.fi>
	<420bc317$0$4925$9b622d9e@news.freenet.de>
Message-ID: <KT1Pd.641$gz1.258@read3.inet.fi>

> pekka niiranen wrote:
> 
>> I have two files "my.utf8" and "my.utf16" which
>> both contain BOM and two "a" characters.
>>
>> Contents of "my.utf8" in HEX:
>>     EFBBBF6161
>>
>> Contents of "my.utf16" in HEX:
>>     FEFF6161
> 
> 
> This is not true: this byte string does not denote
> two "a" characters. Instead, it is a single character
> U+6161.
> 
Correct, I used hexeditor to create those files.

>> Is there a trick to read UTF8 encoded file with BOM not decoded?
> 
> 
> It's very easy: just drop the first character if it is the BOM.

I know its easy (string.replace()) but why does UTF-16 do
it on its own then? Is that according to Unicode standard or just
Python convention?

> 
> The UTF-8 codec will never do this on its own.


Never? Hmm, so that is not going to change in future versions?

> Regards,
> Martin


From benji at benjiyork.com  Wed Feb  9 11:09:49 2005
From: benji at benjiyork.com (Benji York)
Date: Wed, 09 Feb 2005 11:09:49 -0500
Subject: Reportlab and Barcodes
In-Reply-To: <1107894763.331701.26470@c13g2000cwb.googlegroups.com>
References: <1107894763.331701.26470@c13g2000cwb.googlegroups.com>
Message-ID: <420A35CD.8050308@benjiyork.com>

Josh wrote:
> I need someone to explain to me how to output a Code39 barcode to a
> Reportlab PDF. 

This may not help you directly, but I've made use of it in the past: a 
very nice and totally free 3 of 9 TrueType font.

http://www.barcodesinc.com/free-barcode-font/
--
Benji


From porterboy76 at yahoo.com  Fri Feb 25 05:30:52 2005
From: porterboy76 at yahoo.com (porterboy)
Date: 25 Feb 2005 02:30:52 -0800
Subject: automatic nesting and indentation in emacs
Message-ID: <c4b57fd0.0502250230.707e5950@posting.google.com>

CONTEXT:
I am using Emacs to edit Python code and sometimes also Matlab code.
When I hit <return> in a loop of some sort, Emacs usually gets the
nesting indentation right, which is particularly important in Python.
To ensure this I have used python-mode.el and matlab.el modes in
emacs.

QUESTION:
If I suddenly decide I want an outer loop, do I have to manually
readjust the indentation of all the inner loops? Or can emacs do it
automatically? I know the Matlab in-built editor has a tool called
"smart-indent" which will automatically align highlighted text to have
the correct indentation. Does Emacs have something similar?

Thanks
The Porterboy - "Lovely day for a Guinness"


From reinhold-birkenfeld-nospam at wolke7.net  Mon Feb 21 12:35:26 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Mon, 21 Feb 2005 18:35:26 +0100
Subject: exercise: partition a list by equivalence
In-Reply-To: <1108930946.798235.274580@z14g2000cwz.googlegroups.com>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<1108814276.680736.264380@l41g2000cwc.googlegroups.com>
	<37pb5jF5fnfivU1@individual.net> <37ribcF5er80rU1@individual.net>
	<1108930946.798235.274580@z14g2000cwz.googlegroups.com>
Message-ID: <37ukd8F5gt209U1@individual.net>

John Machin wrote:
> Reinhold Birkenfeld wrote:
>> Reinhold Birkenfeld wrote:
>>
>> > My solution (which may not be the fastest or most effective, but
> till
>> > now is the shortest <wink> and it works):
> 
> [snip RB]
>>
>> A recursive solution (around twice as fast as the above, though very
>> slow still...)
>>
> [snip RB2]
>>
>> Another one:
>>
> 
> [snip RB3]
> 
> Dunno what data you are using for timing, but my tests suggest that RB
> is fast enough, RB3 is slightly faster, but RB2 is a real dog and
> appears to be quadratic [hint: it has that same for-for-for-update
> signature found in phase 2 of Xah's effort]. Not only that, but it
> seems to be somewhat irregular. Below are some results on trivial test
> data:
[snip]

Yes, I don't know exactly how I timed this, and I just posted the
solutions to show that there are very different solutions possible. They
are surely not using the best algorithms, as bearophile's function showed.

Reinhold



From rkern at ucsd.edu  Mon Feb  7 20:47:30 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 07 Feb 2005 17:47:30 -0800
Subject: Big development in the GUI realm
In-Reply-To: <4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com>
References: <mailman.2123.1107820051.22381.python-list@python.org>
	<4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com>
Message-ID: <cu95nd$7cr$1@news1.ucsd.edu>

Luke Skywalker wrote:
> On Tue, 08 Feb 2005 10:47:25 +1100, Tim Churches
> <tchur at optushome.com.au> wrote:
> 
>>So there you have it: there must be some portion of the GPLed Program contained in 
>>the other work for it to fall under the scope of the GPL, and/or as defined as a 
>>derivative work in local copyright law (local because the GPL does not nominate a 
>>particular jurisdiction for covering law).
> 
> 
> Has someone worked with Qt for Windows before, and could tell us
> whether it involves static or dynamic linking?
> 
> If dynamic, then, it doesn't make sense that an EXE that builds on Qt
> should also be GPLed.

*shrug* To my knowledge, no court has ruled either way on the issue. The 
FSF holds the position that the new program *should* have a 
GPL-compatible license and that the GPL terms hold for the program as a 
whole. Trolltech also holds this position, I believe (and this is the 
important point if you want to avoid being sued, regardless of how a 
court would decide).

Now, that's not to say that they are correct in their interpretation of 
the GPL's terms. In fact, if I had to bet on an outcome, I'd probably 
wager that the court would hold that only static linking would force the 
program as a whole to follow the GPL terms. However, I certainly don't 
have the money to pony up to run a test case. Consequently, I try to 
follow the wishes of the copyright holder.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From ilias at lazaridis.com  Thu Feb 17 13:01:08 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Thu, 17 Feb 2005 20:01:08 +0200
Subject: [EVALUATION] - E02 - ULTIMATE RECIPE TO RESOLVE ALL ISSUES
In-Reply-To: <cuv1st$6um$1@swifty.westend.com>
References: <cuo71l$gig$1@usenet.otenet.gr> <cuv1st$6um$1@swifty.westend.com>
Message-ID: <cv2m54$hnf$1@usenet.otenet.gr>

Peter Maas wrote:
> Ilias Lazaridis schrieb:
> 
>> I'm a newcomer to python:
> 
> 
> Sorry, I'm breaking my promise to post only once to this thread.

I'm breaking my 'promise' to close this thread.

> But I've found the ultimate recipe to resolve all issues of this and 
> other similar threads:
> 
> Please read
> 
> http://nobelprize.org/medicine/educational/pavlov/
> 
> and then do something useful :)

I don't think that this would change the disastrous communication 
behaviour of the python community [1]. For sure it has not changed yours.

And I don't think that this would change anything on the huge amounts of 
off-topic posts [including yours, and of course my reply to yours].

This thread proofs simply the inability of this community [1] to focus 
on a simple essence.

-

[1] community: the publically writing, within c.l.python

.

-- 
http://lazaridis.com


From tom at dtsam.com  Tue Feb  8 15:39:14 2005
From: tom at dtsam.com (Thomas Bartkus)
Date: Tue, 8 Feb 2005 14:39:14 -0600
Subject: variable declaration
References: <cu2l5t$cf9$01$1@news.t-online.com>
	<MSGID_2=3A5025=2F3.131_4208c092@fidonet.org>
Message-ID: <j7Sdnby-pcHfvpTfRVn-jQ@telcove.net>

"Alexander Zatvornitskiy"
<Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org> wrote in message
news:MSGID_2=3A5025=2F3.131_4208c092 at fidonet.org...
<snip>
> The worst thing is that in such calculations you often receive plausible
results.
<snip>

Exactly so!

An ordinary spelling error gets promoted to a logic error that is damn
difficult to detect, let alone trace!  Before one even tries, it behooves
one to spell check his variables. An additional step that counters Python's
procedural simplicity.

"i" comes before "e" except after "c" OR whenever I make a typo!
Thomas Bartkus




From aleaxit at yahoo.com  Sun Feb  6 11:15:23 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 6 Feb 2005 17:15:23 +0100
Subject: Confused with methods
References: <mailman.2022.1107703890.22381.python-list@python.org>
Message-ID: <1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>

jfj <jfj at freemail.gr> wrote:

> I don't understand.
> We can take a function and attach it to an object, and then call it
> as an instance method as long as it has at least one argument:
> 
> #############
> class A:
>    pass
> 
> def foo(x):
>    print x
> 
> A.foo = foo
> a=A()
> a.foo()
> #############

Right.  If you want to understand how this happens, look at the
foo.__get__ special method, which makes foo (like every other function)
a *descriptor*.  One you've set foo as an attribute of class A, the
access a.foo calls foo.__get__(a, A) which returns an object of class
"instance method".


> However this is not possible for another instance method:
> 
> ############
> class A:
>   pass
> 
> class B:
>   def foo(x,y)
>       print x,y
> 
> b=B()
> A.foo = b.foo

What you're assigning here as an attribute of class A is not a
descriptor: it does not have a special method __get__.

> a=A()
> 
> # error!!!
> a.foo()

Since A.foo does not have a method __get__, it's just returned when you
access it (on instance a).  It's already an instance method -- but it's
bound to instance b of class B.

> ##############
> 
> Python complains that 'foo() takes exactly 2 arguments (1 given)'.
> But by calling "b.foo(1)" we prove that it is indeed a function which takes
> exactly one argument.

Calling something does not prove it's a function.  Python has a lot of
callable objects, and functions are just one callable types.  So, you're
mistaken if you think that by calling (whatever) you prove said whatever
is a function (of any kind).

The error message you're seeing does come from a function -- the im_func
attribute of b.foo, which is a function foo taking two arguments
(created and set into class B by the "def foo(x, y):" above, even though
you forgot the colon I'm sure you intended to type it).

 
> Isn't that inconsistent?

That Python has many callable types, not all of which are descriptors?
I don't see any inconsistency there.  Sure, a more generalized currying
(argument-prebinding) capability would be more powerful, but not more
consistent (there's a PEP about that, I believe).

If what you want is to focus on the error message, you can completely
separate it from the idea of having set b.foo as an attribute of class
A.  Just try calling b.foo() without arguments and you'll get exactly
the same error message -- from the underlying function foo, which is
also b.foo.im_func (the function's FIRST argument is bound to
b.foo.im_self, which is b; whence the error being about function foo
taking exactly two arguments and only one having been given).


Alex


From fredrik at pythonware.com  Fri Feb  4 09:12:19 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 4 Feb 2005 15:12:19 +0100
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<kavad2-59d.ln1@eskimo.tundraware.com>
Message-ID: <ctvvq4$bgs$1@sea.gmane.org>

Tim Daneliuk wrote:

> THis is why, IMHO, things like SOAP a laughable - RPC is a poor
> foundation for reliable, durable, and high-performance TP.  It might be
> fine for sending an order or invoice now and then, but sustained through-
> put of the sort I think of as "high" performance is likely never going to be
> accomplished with session-oriented architectures.

does 50 gigabytes per day, sustained, count as high performance in your book?

</F> 





From deetsNOSPAM at web.de  Wed Feb  9 10:39:24 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 09 Feb 2005 16:39:24 +0100
Subject: probably weird or stupid newbie dictionary question
References: <1107962661.011759.30100@f14g2000cwb.googlegroups.com>
Message-ID: <36up5bF564mc5U1@individual.net>

hawkmoon269 wrote:

> I've read in several places that a Python dictionary is analagous to
> some other languages' hash table (Perl's, for instance).  But FMU a
> dictionary's keys are *themselves* hashed so that a hash table exists
> that maps hashed key values to keys in the dictionary.  ISTM, then,
> that the analogy is at least somewhat faulty...except for the fact that
> a dictionary's keys could themselves be hashed redundantly...i.e., the
> values to be used as keys could be hashed, inserted into the dictionary
> (and mapped to their values, of course), and they would then be hashed
> (again) behind the scenes...IOW, ISTM that a dictionary is correctly
> understood generally as a mapping (as documentation indicates) and
> *could* be understood as a special case hash table itself...Is that
> accurate?

You're having a point that dicts are mappings. But you're somewhat lost on
your understanding of what gets hashed why and when.

Hashing is _one_ way of accomplishing a mapping - and usually the easiest,
as it has the minimum of requirements for the supported key objects. Other
techniques rely on a total order of keys - which can sometimes not be
reached. So it is used in most mapping implementations, and for some
languages like perl, the method of mapping became the synonym or name for
the mapping itself - thus the name "hash".

Take for example java: There one usually takes HashMap as the implementation
for the Map interface - TreeMap forces the objects to be either Comparable
or having an explicit comparison function be passed.

OTH every Object in java has a hashCode method that will allow its usage in
a HashMap

But what happens in case of a hash code clash? Then a list of (key, values)
is stored, and for a passed key, each key in that list is additionally
compared for being equal to the passed one. So another requirement of
hashable objecst is the comparability. In java, this is done using the
equals method.

So in the end, the actual mapping of key, value looks like this:

hash(key) -> [(key, value), ....]

HTH.
-- 
Regards,

Diez B. Roggisch


From tjreedy at udel.edu  Tue Feb 15 17:33:11 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 15 Feb 2005 17:33:11 -0500
Subject: Accessing Objects Based On Their ID
References: <uc39e2-63h1.ln1@eskimo.tundraware.com>
Message-ID: <cutt6d$bu6$1@sea.gmane.org>


"Tim Daneliuk" <tundra at tundraware.com> wrote in message 
news:uc39e2-63h1.ln1 at eskimo.tundraware.com...
> Given the ID of an object, is there a way to access it?
You got the right short answer already.
Another long answer 'yes' is to keep a dictionary mapping ids to objects, 
but as Diez pointed out, you need a real reason to do this.

In some respects, id() is like a siren (in the mythological sense) that 
Python would be better off without.

Terry J. Reedy





From http  Thu Feb 17 02:41:51 2005
From: http (Paul Rubin)
Date: 16 Feb 2005 23:41:51 -0800
Subject: Pausing a program - poll/sleep/threads?
References: <1108625477.222091.34680@l41g2000cwc.googlegroups.com>
Message-ID: <7xekffr5ts.fsf@ruckus.brouhaha.com>

"Simon John" <simoninusa2001 at yahoo.co.uk> writes:
> So, how would I make a Python program automatically call a function
> after a preset period of time, without the Python process running in
> the foreground (effectively single-tasking)?

See the signal module and use the alarm signal.


From petr at tpc.cz  Sat Feb 19 21:16:59 2005
From: petr at tpc.cz (McBooCzech)
Date: 19 Feb 2005 18:16:59 -0800
Subject: Fuzzy matching of postal addresses
In-Reply-To: <mailman.2791.1108709008.22381.python-list@python.org>
References: <mailman.875.1106093219.22381.python-list@python.org>
	<1108682472.028307.92060@o13g2000cwo.googlegroups.com>
	<mailman.2791.1108709008.22381.python-list@python.org>
Message-ID: <1108865819.020215.250110@o13g2000cwo.googlegroups.com>

Sorry for my "Ferbl typo". For the local anti-smoking campaign I am
trying to link some addresses which contain following "linkable"
informations (data fields) only:

RECORD_ID, Street + No., City, Post code,

All data are now w/o Unicode characters. Do you think it possible to
try to link it with Febrl w/o deep code modification?

I did try to link our data but the result is just a plenty of warning
messages but no links. What is your suggestion? Please understand I do
not want to bother you with my questions. I am just asking you your
comments or pointers before I will try to dig in to the code. You
probably know some "tricks" in data organization or something like
that, which can be much easier then code digging.

I can send our CSVs to you (they are small, just about 3204 records in
the A data-set and about 1241 records in the B data-set) and a log as
well.

I have tried to organized oru files as following:
       FEBRL reqirements : Our data
       ==============================
                 'rec_id': RECORD_ID,
             'given_name': ""
                'surname': ""
             'street_num': ""
         'address_part_1': ""
         'address_part_2': Street + No.
                 'suburb': City
               'postcode': Post code
                  'state': ""
          'date_of_birth': ""
             'soc_sec_id': ""

Thanks for your answer and suggestions

Petr



From dotpyFE at gmail.com  Sun Feb 13 17:46:06 2005
From: dotpyFE at gmail.com (Lucas Raab)
Date: Sun, 13 Feb 2005 22:46:06 GMT
Subject: AES crypto in pure Python?
In-Reply-To: <1108333363.915962.160440@z14g2000cwz.googlegroups.com>
References: <1108333363.915962.160440@z14g2000cwz.googlegroups.com>
Message-ID: <OMQPd.11918$oO.1424@newsread2.news.atl.earthlink.net>

andrew.fabbro at gmail.com wrote:
> I'm looking for an implementation of AES (the Advanced Encryption
> Standard) in pure Python.  I'm aware of pycrypto, but that uses C code.
>  I'm hoping to find something that only uses Python...I'm willing to
> trade speed for portability, since my application is designed for
> several different platforms.
> 
> Anyone know if this has been done?
> 
> Thanks,
> 
> 
> -AF
> 

Google....


From deetsNOSPAM at web.de  Fri Feb 11 12:10:34 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 11 Feb 2005 18:10:34 +0100
Subject: Is this a bug? BOM decoded with UTF8
References: <epMOd.357$7m.215@read3.inet.fi>	<420bc317$0$4925$9b622d9e@news.freenet.de>	<KT1Pd.641$gz1.258@read3.inet.fi>	<373p8vF57039vU1@individual.net>	<mailman.2392.1108129900.22381.python-list@python.org>
	<373sj3F590j6iU1@individual.net>
	<mailman.2394.1108134578.22381.python-list@python.org>
Message-ID: <cuioui$66g$03$1@news.t-online.com>

> They say that it makes no sense as an byte-order indicator but they
> indicate that it can be used as a file signature.
> 
> And I'm not sure what you mean about decoding a UTF-8 string given any
> 8-bit encoding. Of course the encoder must be know:

That every utf-8 string can be decoded in any byte-sized encoding. Does it
make sense? No. But does it fail (as decoding utf-8 frequently does)? No. 

So if you are in a situation where you _don't_ know the encoding, a decoding
can only be based on a heuristic. And a utf-8 BOM can be part of that
heuristic - but it still is only a hint. Besides that, lots of tools don't
produce it. E.g. everything that produces/consumes xml doesn't need it.

>  >>> u'T\N{LATIN SMALL LETTER U WITH DIAERESIS}r'
> ...   .encode('utf-8').decode('latin1').encode('latin1')
> 'T\xc3\xbcr'

If the encoder is to be known, using the BOM becomes obsolete.

> I can assume you that most Germans can differentiate between "T?r" and
> "T??r".

Oh, germans can. Computers oth can't. You could try and use common words
like "f?r" and so on for a heuristic. But that is no guarantee.

> Using a BOM with UTF-8 makes it easy to indentify it as such AND it
> shouldn't break any probably written Unicode-aware tools.

As the faq states, that can very well happen.

-- 
Regards,

Diez B. Roggisch


From fredrik at pythonware.com  Sun Feb 13 09:28:19 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 13 Feb 2005 15:28:19 +0100
Subject: goto, cls, wait  commands
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net><LGMOd.47294$Z14.32758@news.indigo.ie>
	<86k6pd7157.fsf@guru.mired.org>
Message-ID: <cuno1d$hqg$1@sea.gmane.org>

Mike Meyer wrote:

>>> Secondly, how do I clear screen (cls) from text and other content ?
>>
>> That depends on
>>
>> A: What type of display device you're using
>> B: What type of interface is being rendered on that display (command
>> line, GUI, IDE, etc)
>> C: Perhaps what operating system you are using.
>
> D: Whether or not you have a display device at all. I run Python
> scripts from Cron whose sole output functionality is via email. I run
> Python scripts as daemons whose sole output functionality is syslog.

are you the original poster?  if so, can you explain why you asked
how to clear the screen if you don't have a screen?

</F> 





From sjmachin at lexicon.net  Wed Feb  2 18:17:23 2005
From: sjmachin at lexicon.net (John Machin)
Date: 2 Feb 2005 15:17:23 -0800
Subject: Reference count question
In-Reply-To: <mailman.1766.1107367880.22381.python-list@python.org>
References: <003401c5090b$2f0f4fb0$90010d0a@umanis.com>
	<mailman.1766.1107367880.22381.python-list@python.org>
Message-ID: <1107386243.715419.122470@f14g2000cwb.googlegroups.com>


Fredrik Lundh wrote:
>
> >    PyList_SetItem(List,i,Str);
>
> you should check the return value, though.  PyList_SetItem may (in
> theory) fail.
>

:-)
Only a bot could say that. We mere mortals have been known to do things
like (a) pass a non-list as the first argument (b) pass an out-of-range
value for the second argument.
(-:



From mahs at telcopartners.com  Thu Feb 17 01:47:20 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 16 Feb 2005 22:47:20 -0800
Subject: sampling items from a nested list
In-Reply-To: <cv0r2m$ebh$1@sea.gmane.org>
References: <7_adnQhRBYDdV47fRVn-sA@comcast.com> <cv0r2m$ebh$1@sea.gmane.org>
Message-ID: <cv1egc$6fl$1@sea.gmane.org>

Michael Spencer wrote:

>  >>> def resample2(data):
>  ...     bag = {}
>  ...     random.shuffle(data)
>  ...     return [[(item, label)
>  ...                 for item, label in group
>  ...                     if bag.setdefault(label,[]).append(item)
>  ...                         or len(bag[label]) < 3]
>  ...                            for group in data if not 

...which failed to calculate the minimum count of labels, try this instead 
(while I was at it, I removed the insance LC)

  >>> def resample3(data):
  ...     bag = {}
  ...     sample = []
  ...     labels  = [label for group in data for item, label in group]
  ...     min_count = min(labels.count(label) for label in set(labels))
  ...     random.shuffle(data)
  ...     for subgroup in data:
  ...         random.shuffle(subgroup)
  ...         subgroupsample = []
  ...         for item, label in subgroup:
  ...             bag.setdefault(label,[]).append(item)
  ...             if len(bag[label]) <= min_count:
  ...                 subgroupsample.append((item,label))
  ...         sample.append(subgroupsample)
  ...     return sample
  ...
  >>>

Cheers

Michael



From fredrik at pythonware.com  Thu Feb 17 02:51:54 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 17 Feb 2005 08:51:54 +0100
Subject: Help with C extensions under VC6 / WinXP and Python 2.4
References: <mailman.2731.1108605453.22381.python-list@python.org><s30811dnlp51u3t1td3s6q0efp7b3m2ma0@4ax.com>
	<4214055E.2090408@cs.princeton.edu>
Message-ID: <cv1i8v$ef2$1@sea.gmane.org>

"Scott" <scott+python at CS.Princeton.EDU> wrote:

> >>The trouble I have is that there are no PC or PCbuild
> >>subdirectories in C:\Python24.  Where do I find these?
> >
> >
> > As the quoted URL says (2nd para):
> > """
> > To build extensions using these instructions, you need to have a copy
> > of the Python sources of the same version as your installed Python.
> > [snip]
> > The example files described here are distributed with the Python
> > sources in the PC\ example_nt\ directory
> > """
> >
> > i.e. you have to download a copy of the Python source distribution.
>
> Since I had an include directory, I assumed (incorrectly) that
> I already had the sources.  Thanks for the reiteration -- it's
> what I needed.

here's another iteration: the top of that page says:

    "There are two approaches to building extension modules on Windows,
    just as there are on Unix: use the distutils package to control the
    build process, or do things manually. The distutils approach works
    well for most extensions; documentation on using distutils to
    build and package extension modules is available in "Distributing
    Python Modules". This section describes the manual approach to
    building Python extensions written in C or C++. "

if you're not 100% sure what you're doing, and why you need to use the
manual approach (you don't), *please* use the distutils solution.  here's
a minimal setup script:

from distutils.core import setup, Extension

setup(
    name="mymodule",
    ext_modules = [Extension("mymodule", ["mymodule.c"])]
    )

to build, use "python setup.py build".  to build a local copy ("in place"), use
"python setup.py build_ext -i".  to build and install, use "python setup.py
install".

no need to download any extra stuff; it just works.

</F> 





From wittempj at hotmail.com  Wed Feb 16 11:47:20 2005
From: wittempj at hotmail.com (wittempj at hotmail.com)
Date: 16 Feb 2005 08:47:20 -0800
Subject: more os.walk() issues... probably user error
In-Reply-To: <cuvsmi$4bb$1@solaris.cc.vt.edu>
References: <cuvr5b$2ei$1@solaris.cc.vt.edu><cuvsmi$4bb$1@solaris.cc.vt.edu>
Message-ID: <1108572439.966901.279470@f14g2000cwb.googlegroups.com>

That's an easy one: fs_objects is not modified by your ode, so you get
it back as created by os.walk



From peter at somewhere.com  Tue Feb  1 09:54:19 2005
From: peter at somewhere.com (Peter Maas)
Date: Tue, 01 Feb 2005 15:54:19 +0100
Subject: Next step after pychecker
In-Reply-To: <tyffz0gmtpo.fsf@pcepsft001.cern.ch>
References: <41ff0308$0$6503$636a15ce@news.free.fr>
	<7xis5cq5bj.fsf@ruckus.brouhaha.com>
	<tyffz0gmtpo.fsf@pcepsft001.cern.ch>
Message-ID: <cto5b9$hpi$1@swifty.westend.com>

Jacek Generowicz schrieb:
> You also gain not having to clutter your code with all the type
> declarations. And you gain not having to decide what types you will
> use too early on in development.

But it can be useful to restrict type variety in certain situations
e.g. prime number calculation :) And it would probably also be useful
to check violations of restrictions before running the program in
normal mode.

This must not necessarily mean 'int this, float that'. E.g. the
following would be nice:

a := some_type_value  # "type fixing" assignment
a = other_type_value  # error: a is restricted to some_type
a := yet_another_type_value  # OK, another fixed type is set
del a # release type restriction; a can be recreated in normal
       # dynamic mode

The type fixing assignment could be used for optimization and for
checking the program with pychecker.

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From fredrik at pythonware.com  Sun Feb 20 06:51:13 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 20 Feb 2005 12:51:13 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr><42172136$0$27576$9b622d9e@news.freenet.de><cv7i57$d0v$1@usenet.otenet.gr><42185b05$0$15460$9b622d9e@news.freenet.de>
	<cv9sdo$69n$3@usenet.otenet.gr>
Message-ID: <cv9tcn$2o3$1@sea.gmane.org>

Ilias Lazaridis wrote:

> Should a professional developer take python serious?

yes.

</F> 





From deetsNOSPAM at web.de  Mon Feb 21 06:59:28 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 21 Feb 2005 12:59:28 +0100
Subject: Keyword Named Args
References: <1108984625.683340.121680@g14g2000cwa.googlegroups.com>
Message-ID: <37u0mvF5g5qvhU1@individual.net>

> What I can't easily see is any way of passing named keyword arguments
> to the function. Suppose we wanted to pass keyword=param to a function
> - is there any way of doing this ... obviously passing in
> 'keyword=param' as text has entirely the wrong result......

Im not sure if I understand you fully, but if what you are after is how to
pass named parameters analog to positional args, do it as dict:

def foo(name=None):
    print name

foo(**{name: "Fuzzy"})


-- 
Regards,

Diez B. Roggisch


From tbunce at mac.com  Tue Feb  1 19:41:53 2005
From: tbunce at mac.com (Thomas Bunce)
Date: Tue, 01 Feb 2005 16:41:53 -0800
Subject: How do you do arrays
References: <tbunce-0102051052450001@192.168.1.12>
	<-rWdnWyelepdn53fRVn-oQ@rogers.com>
Message-ID: <tbunce-0102051641530001@192.168.1.12>

Thanks 
   Tom
In article <-rWdnWyelepdn53fRVn-oQ at rogers.com>, "Dan Perl"
<danperl at mail-me.com> wrote:

> A solution that I haven't seen mentioned by other postings in the thread is 
> to implement the array as a dictionary:
> 
> iMatrix = {}
> for index in range(majorlop1):
>     k = random.choice(listvalues) + 1
>     iMatrix[index] = k
> 
> Mind you, a dictionary does not behave *exactly* like an array.  For 
> instance, in your example, you may later do a "del iMatrix[2]" and then you 
> wouldn't really be able to use iMatrix like an array anymore.  But, 
> depending on your application, a dictionary may be perfectly suitable.
> 
> Hope this helps.
> 
> Dan
> 
> "Thomas Bunce" <tbunce at mac.com> wrote in message 
> news:tbunce-0102051052450001 at 192.168.1.12...
> >I am new at Pyton and I am learning from book not classes
> > so please forgive my being slow
> >
> > The below does not work I get an Error of  File
> > "Matrix[index] = k
> > NameError: name 'iMatrix' is not defined"
> >
> > while  index < majorlop1:
> >   index = index + 1
> >   k = random.choice(listvalues) + 1
> >   iMatrix[index] = k
> >
> > The book statement of
> > array(typecode, initializer) does not make sence
> > to me how it henerates ore relaes to the org name
> > for the array.
> >
> > Thank You
> >     Tom


From pinard at iro.umontreal.ca  Sun Feb 20 13:43:24 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Sun, 20 Feb 2005 13:43:24 -0500
Subject: [ANN] Python 2.4 Quick Reference available
In-Reply-To: <cva8gd$3v7$1@gemini.csx.cam.ac.uk>
References: <cv79sj$mgk$1@aphrodite.grec.isp.9tel.net>
	<1108831318.290846.5930@z14g2000cwz.googlegroups.com>
	<qnkll9kv09y.fsf@arbutus.physics.mcmaster.ca>
	<37qaleF5gd7bcU1@individual.net> <421898CD.6040408@iinet.net.au>
	<mailman.2863.1108909421.22381.python-list@python.org>
	<cva8gd$3v7$1@gemini.csx.cam.ac.uk>
Message-ID: <20050220184324.GA19840@phenix.progiciels-bpi.ca>

[Michael Hoffman]

> To be honest I doubt open will be extended in this manner.

I did not read Guido's arguments for a while, so I may remember them
wrongly.  So, take me with a grain of salt.  I would not think Guido is
arguing for the sole sake of arguing.  Maybe his plans or visions will
change, but until such changes are announced, I've no reason to doubt
them :-). All in all, `file' is now probably to be considered safer than
`open', despite Guido advises to prefer `open'.

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From tom.willis at gmail.com  Thu Feb 10 21:41:32 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Thu, 10 Feb 2005 21:41:32 -0500
Subject: Unit Testing in Python
In-Reply-To: <roy-D161EC.21340610022005@reader2.panix.com>
References: <1108087841.271630.228970@o13g2000cwo.googlegroups.com>
	<roy-D161EC.21340610022005@reader2.panix.com>
Message-ID: <b54d048905021018416a31a125@mail.gmail.com>

Neat the original poster shows up as a potential Phisher with a nice
big red warning in gmail.

Due to some funky header fakedness.

Don't give them your SSN. :)

I have a related question. What is PyDoc? I see it come up alot in
searches for Unit testing and python, but I've never gotten around to
finding out why.


Maybe I'll do that now.



On Thu, 10 Feb 2005 21:34:06 -0500, Roy Smith <roy at panix.com> wrote:
> In article <1108087841.271630.228970 at o13g2000cwo.googlegroups.com>,
>  "rhat" <fakeadmin at gmail.com> wrote:
> 
> > Hi Everyone,
> > I've recently been reading some articles about unit-testing in Python
> > [1] [2], but I am a bit confused: where do I go to get started with
> > this? I tried googling for "unittest" but all I've found are some old
> > links to projects that already use it, and the older (as the articles
> > put it) PyUnit project. I'm sorry if this is a obvious question or one
> > that has already been answered, but unit-testing sounds interesting and
> > I'm not sure where to start.
> >
> > Thanks,
> > Ryan Kaulakis
> 
> PyUnit is indeed what I use.  It's included in current distributions as the
> "unittest" module.
> 
> The module docs aren't perfect (especially when it comes to the big
> picture), but there's a good tutorial at
> http://diveintopython.org/unit_testing/index.html
> 
> Once you get your head around how it works, it's really quite simple to
> use.  It also has the advantage of being one of a series of "X-unit"
> packages for different languages (Junit, C++Unit, etc) which all have the
> same organization (with allowances made for language-specific
> requirements).  This means once you've learned one, you've got a big head
> start one learning another one.
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
Thomas G. Willis
http://paperbackmusic.net


From gmane-schpam at joefrancia.com  Tue Feb 15 16:48:00 2005
From: gmane-schpam at joefrancia.com (Joe Francia)
Date: Tue, 15 Feb 2005 16:48:00 -0500
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cutk8f$qu2$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>	<cupstp$an7$2@ctb-nnrp2.saix.net>	<cupupa$kfs$2@usenet.otenet.gr>	<cupvhi$c15$1@news1.ucsd.edu>	<cuq084$r99$1@usenet.otenet.gr>	<cuq2h0$j2s$1@eeyore.INS.cwru.edu>	<cuq57b$j83$1@usenet.otenet.gr>	<37bkemF5a7s7vU1@individual.net>	<cut6nh$rpk$1@usenet.otenet.gr>	<86ll9piuj8.fsf@guru.mired.org>	<cutf1h$576$1@usenet.otenet.gr>	<mailman.2644.1108496325.22381.python-list@python.org>
	<cutk8f$qu2$1@usenet.otenet.gr>
Message-ID: <cutqhm$bs2$1@sea.gmane.org>

Ilias Lazaridis wrote:
> Joe Francia wrote:
> 
>> Ilias Lazaridis wrote:
> 
> [...]
> 
>>> MinGW compatibility is not [only] my need.
>>>
>>> It is an community need [at least partially]
>>
>>
>> You keep using that word "community". I do not think it means what you 
>> think it means.
> 
> 
> The community is everyone around python (including me at this moment).
> 
> We could call i userbase, too, but one needs not to be a actual user to 
> be a community member.
> 

Well, I'm glad you cleared that up (even though you clearly missed the 
"Princess Bride" reference).  As a member *and* user in the Python 
community, I hereby declare MinGW as unnecessary to the successful 
continuation of Python.  When I need to compile extensions on win32, 
VS.NET works splendidly.  (And gcc covers my FreeBSD & Linux extension 
compiling needs - I have no unusual demands or expectations that the 
Python "community" will support, say, the Intel C compiler on those 
platforms).

 > what do you think about?

Oh, different things at different times, but it's usually not about 
MinGW support for Python.

-- 
Soraia: http://www.soraia.com



From nytimes at swiftdsl.com.au  Fri Feb 18 01:16:17 2005
From: nytimes at swiftdsl.com.au (news.sydney.pipenetworks.com)
Date: Fri, 18 Feb 2005 17:16:17 +1100
Subject: [OT]: Re: Why doesn't join() call str() on its arguments?
In-Reply-To: <87hdka8rbc.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<37hqlrF59l2b2U1@individual.net>
	<873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<421450CC.9080504@swiftdsl.com.au>
	<87psyz8h9o.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<4214A800.4010509@swiftdsl.com.au>
	<pan.2005.02.17.15.13.36.917107@jerf.org>
	<42155DAF.4010806@swiftdsl.com.au>
	<87hdka8rbc.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
Message-ID: <42158831.9040207@swiftdsl.com.au>

Nick Vargish wrote:
> "news.sydney.pipenetworks.com" <nytimes at swiftdsl.com.au> writes:
> 
> 
>>I always wished computer science was more engineering then
>>philosophy. That way there'd always be an obvious answer.
> 
> 
> You don't have a lot of experience with philosophers, do you?

No

> Most of them are quite willing to go on at great length about the
> obvious answer to just about any question... You get a dozen obvious
> answers with every twelve philosophers.

Interesting. I guess its obvious once stated, because if it wasn't 
obvious, many people wouldn't agree. I'm sure theres got to be a few 
copy cats in those 12 though.

> Nick 
> 
> p.s. I've been working on a philosophy degree for about... 15 years
> now.

Does that mean you just haven't had time to finish ? or you have been 
studying philosophy for 15 years ?

Huy


From suryaprakashg at gmail.com  Wed Feb  9 15:25:35 2005
From: suryaprakashg at gmail.com (suryaprakashg at gmail.com)
Date: 9 Feb 2005 12:25:35 -0800
Subject: two questions - no common theme
In-Reply-To: <e5063e96.0502091207.37b1dd54@posting.google.com>
References: <e5063e96.0502091207.37b1dd54@posting.google.com>
Message-ID: <1107980735.251513.167820@o13g2000cwo.googlegroups.com>

 def walktree(self,top=".", depthfirst=False):
        """
        Walk a directory tree, starting from 'top'

        This code is based on os.path.walk, with the callback function
        replaced by a yield and recursion replaced by iteration
        """
        if type(top) != types.StringType:
            raise TypeError("top must be a string")

        # decide which end of the stack to pop
        if depthfirst:
            index = -1
        else:
            index = 0

        dirstack = [top]
        while dirstack:
            top = dirstack.pop(index)
            try:
                names = os.listdir(top)
            except os.error:
                 return
            yield top, names
            dirs = []
            for name in names:
                name = os.path.join(top, name)
                try:
                    st = os.lstat(name)
                except os.error:
                    continue
                if stat.S_ISDIR(st.st_mode):
                    dirs.append(name)
            # the depth-first results look 'backwards' to me
            # so I'm changing them to fit my expectations
            if depthfirst:
                dirs.reverse()
            dirstack.extend(dirs)


this function might be useful


Sean McIlroy wrote:
> And now for a pair of questions that are completely different:
>
> 1) I'd like to be able to bind callbacks to presses of the arrow
> buttons on the keyboard. How do you say that in Tkinter?
>
> 2) The function 'listdir' in os.path returns a list of all the files
> in the given directory - how do I get hold of a list of its
> subdirectories?
> 
> Any help will be greatly appreciated.
> 
> Peace,
> STM



From aleaxit at yahoo.com  Wed Feb  9 18:41:58 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Thu, 10 Feb 2005 00:41:58 +0100
Subject: empty classes as c structs?
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>
	<mailman.1973.1107618702.22381.python-list@python.org>
	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>
	<mailman.2006.1107658273.22381.python-list@python.org>
	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>
	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>
	<mailman.2049.1107750700.22381.python-list@python.org>
	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com>
	<4207606E.4040806@iinet.net.au> <cu8amb$ufa$1@sea.gmane.org>
	<mailman.2158.1107859833.22381.python-list@python.org>
	<1grnyld.1t8l5kw1nr5aqsN%aleaxit@yahoo.com>
	<E7CdnTFdo5S8AZffRVn-og@comcast.com>
Message-ID: <1grqs37.1sjjd0b162e5z4N%aleaxit@yahoo.com>

Steven Bethard <steven.bethard at gmail.com> wrote:

> I didn't know what to do for __setattr__...  Was that what you meant by
> "The best semantics for _bindings_ as opposed to lookups isn't clear 
> though"?

Yep.  __delattr__ ain't too obvious to me either, though I guess your
semantics for that are OK.


Alex


From fuzzyman at gmail.com  Wed Feb 23 04:17:01 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 23 Feb 2005 01:17:01 -0800
Subject: user interface for python
In-Reply-To: <1109131790.140672.209730@l41g2000cwc.googlegroups.com>
References: <1109131790.140672.209730@l41g2000cwc.googlegroups.com>
Message-ID: <1109150221.947518.209220@o13g2000cwo.googlegroups.com>

wax is a nice layer on top of wx - it maintains cross-platform-ability
and is easier to learn !

See http://zephyrfalcon.org

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From claird at lairds.us  Wed Feb  9 22:08:06 2005
From: claird at lairds.us (Cameron Laird)
Date: Thu, 10 Feb 2005 03:08:06 GMT
Subject: newbie question
References: <1107990182.516041.120410@o13g2000cwo.googlegroups.com>
	<seudnRY79e_AXJffRVn-pg@rogers.com>
Message-ID: <feuqd2-bqv.ln1@lairds.us>

In article <seudnRY79e_AXJffRVn-pg at rogers.com>,
Dan Perl <danperl at mail-me.com> wrote:
			.
			.
			.
>has the conciseness of the C statement.  The pre- and post-increment 
>and -decrement in C/C++/Java are very powerful and I miss them in python. 
>
>

Me, too.

Which is, I suspect, evidence for the incompleteness of our Pythonhood.
As Peter Hansen already hinted in this thread, an appetite for the
increment and related operators probably is a symptom that there's an
opportunity nearby to use an iterator or string method or such.  C++
and Java wish they had it so good.


From petite.abeille at gmail.com  Thu Feb  3 16:31:11 2005
From: petite.abeille at gmail.com (PA)
Date: Thu, 3 Feb 2005 22:31:11 +0100
Subject: The next Xah-lee post contest
In-Reply-To: <1107306365.509084.47890@z14g2000cwz.googlegroups.com>
References: <mailman.1568.1107005758.22381.python-list@python.org>
	<ctg6qn$q63$1@solaris.cc.vt.edu>
	<mailman.1572.1107009638.22381.python-list@python.org>
	<e9lpv0tk63k0v7v1lctt0d77f92ub48bl3@4ax.com>
	<20050130114008.797088857.whereU@now.com>
	<mailman.1602.1107115028.22381.python-list@python.org>
	<1107137465.973491.42050@f14g2000cwb.googlegroups.com>
	<fMpLd.101045$Jk5.4448@lakeread01>
	<sqasv0petsjfr0qb9u7e1i30n8mrjl3t78@4ax.com>
	<Q7ednbtYIue5LWLcRVn-2Q@powergate.ca>
	<1107277633.959477.302860@f14g2000cwb.googlegroups.com>
	<1107306365.509084.47890@z14g2000cwz.googlegroups.com>
Message-ID: <7b720e27bba50c8a06e1999c72a4614b@gmail.com>


On Feb 02, 2005, at 02:10, alex23 wrote:

> Which bits especially impress you, the rampant misogyny or the
> unwarranted intellectual arrogance?

A bit of both, really.

"Barbie Anthropology"
http://xahlee.org/Periodic_dosage_dir/20030919_barbie.html

Cheers

--
PA, Onnay Equitursay
http://alt.textdrive.com/



From ionel.mc at gmail.com  Tue Feb 15 04:20:31 2005
From: ionel.mc at gmail.com (ionel)
Date: Tue, 15 Feb 2005 11:20:31 +0200
Subject: How to implement a file lock ??
Message-ID: <b322b4e605021501206c98e05@mail.gmail.com>

is there a cross-platform library or module for file locking?
or at least a win32 implementation.

i'm trying to get a lock on some file in a cgi script. ( i got my data
erased a few times :P )


-- 
ionel.


From jeffshannon at gmail.com  Tue Feb 22 01:31:24 2005
From: jeffshannon at gmail.com (Jeff Shannon)
Date: Mon, 21 Feb 2005 22:31:24 -0800
Subject: global var
In-Reply-To: <mailman.2850.1108868141.22381.python-list@python.org>
References: <42152b84$0$15817$636a15ce@news.free.fr>	<cv3a9k$3eu$1@gemini.csx.cam.ac.uk>
	<mailman.2850.1108868141.22381.python-list@python.org>
Message-ID: <3801pvF5iedh4U1@individual.net>

Nick Coghlan wrote:

> Michael Hoffman wrote:
> 
>> raver2046 wrote:
>>
>>> How to have a global var in python ?
>>
>> "global var" will give you a global variable named "var".
> 
> Whether this advice is correct or not depends greatly on what the OP 
> means by 'global' :)
> 
> Module global, it's right, application global it's wrong. Given the 
> nature of the question, I suspect the latter.

And even there, one must be careful.  "global var" won't really give you 
a global variable; it will cause the name "var", when used locally, to 
refer to a pre-existing module-level reference "var".  No variables are 
actually created in the execution of "global var".

Jeff Shannon


From titus at caltech.edu  Fri Feb 11 13:13:21 2005
From: titus at caltech.edu (Titus Brown)
Date: Fri, 11 Feb 2005 10:13:21 -0800
Subject: mxCGIPython binaries for Python 2.3.5
In-Reply-To: <20050211154457.GA23787@phd.pp.ru>
References: <20050211154457.GA23787@phd.pp.ru>
Message-ID: <20050211181320.GA23241@caltech.edu>

what does mxCGIPython do?  I can't find anything at that Web site that
doesn't involve downloading & unpacking a file.

thanks,
--titus

On Fri, Feb 11, 2005 at 06:44:57PM +0300, Oleg Broytmann wrote:
-> http://phd.pp.ru/Software/Python/misc/mxCGI/
-> 
->    mxCGIPython binaries for Python 2.1.3, 2.2.3, 2.3.5 and 2.4.0 on
-> Linux, Solaris 2.5.2, FreeBSD 4.9 and FreeBSD 5.3.
-> 
-> Oleg.
-> -- 
->      Oleg Broytmann            http://phd.pp.ru/            phd at phd.pp.ru
->            Programmers don't die, they just GOSUB without RETURN.
-> -- 
-> http://mail.python.org/mailman/listinfo/python-announce-list
-> 
->         Support the Python Software Foundation:
->         http://www.python.org/psf/donations.html
-> 


From harlinseritt at yahoo.com  Wed Feb 16 07:31:05 2005
From: harlinseritt at yahoo.com (Harlin)
Date: 16 Feb 2005 04:31:05 -0800
Subject: [newbie]How to install python under DOS and is there any
	Wxpython can be installed under dos?
In-Reply-To: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
References: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
Message-ID: <1108557065.547230.254540@z14g2000cwz.googlegroups.com>

Any reason you're asking about wxPython for "DOS"? Just curious.



From essai1 at mci.local  Sat Feb  5 03:25:07 2005
From: essai1 at mci.local (News M Claveau /Hamster-P)
Date: Sat, 5 Feb 2005 09:25:07 +0100
Subject: who can tell me BASICS of Python
References: <1107588047.020906.321750@g14g2000cwa.googlegroups.com>
Message-ID: <42048844$0$18852$8fcfb975@news.wanadoo.fr>

Troll ?




From steve at holdenweb.com  Mon Feb 28 14:46:57 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 28 Feb 2005 14:46:57 -0500
Subject: cannot open file in write mode, no such file or directory
In-Reply-To: <1109619707.033450.227120@f14g2000cwb.googlegroups.com>
References: <1109618906.347448.218700@o13g2000cwo.googlegroups.com>
	<1109619707.033450.227120@f14g2000cwb.googlegroups.com>
Message-ID: <1zKUd.36580$%U2.35026@lakeread01>

Kartic wrote:
>>I'm having a problem where when trying to open a file in write mode,
> 
> I
> 
>>get an IOError stating no such file or directory.  I'm calling an
>>external program which takes an input file and produces an output
> 
> file
> 
>>repeatedly, simulating the input file separately for each replicate.
>>The error occurs when trying to open the input file to write out the
>>new data.  The problem is difficult to reproduce since it only shows
> 
> up
> 
>>once every few thousand replicates.  I've tried using both os.system
> 
> 
> I am afraid you need to give more information that just IOError,
> calling an external program.
> 
> Please post the exact message including the input filename at the time
> the program went down. If you don't print the filename, please modify
> your program to do so.
> 
> A shot in the dark solution to your problem might be that you are
> dynamically  generating a filename and that filename probably contains
> characters not allowed by the local file system OR you generate a path
> that does not exist. For open() to work with the 'w' flag, the path
> where the file you say should be created should exist.
> 
Another low-probability cause is that you are trying to create files in 
a non-existent directory.

regards
  Steve



From adam at cognitcorp.com  Tue Feb 15 15:04:17 2005
From: adam at cognitcorp.com (Adam DePrince)
Date: Tue, 15 Feb 2005 15:04:17 -0500
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cutibq$j8e$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<cupstp$an7$2@ctb-nnrp2.saix.net> <cupupa$kfs$2@usenet.otenet.gr>
	<cupvhi$c15$1@news1.ucsd.edu> <cuq084$r99$1@usenet.otenet.gr>
	<cuq2h0$j2s$1@eeyore.INS.cwru.edu> <cuq57b$j83$1@usenet.otenet.gr>
	<37bkemF5a7s7vU1@individual.net> <cut6nh$rpk$1@usenet.otenet.gr>
	<86ll9piuj8.fsf@guru.mired.org> <cutf1h$576$1@usenet.otenet.gr>
	<mailman.2643.1108495246.22381.python-list@python.org>
	<cutibq$j8e$1@usenet.otenet.gr>
Message-ID: <1108497857.4186.84.camel@localhost.localdomain>

On Tue, 2005-02-15 at 14:25, Ilias Lazaridis wrote:
> Adam DePrince wrote:
> > On Tue, 2005-02-15 at 13:29, Ilias Lazaridis wrote:
> >>Mike Meyer wrote:
> >>>Ilias Lazaridis <ilias at lazaridis.com> writes:
> [...]
> >>MinGW compatibility is not [only] my need.
> >>
> >>It is an community need [at least partially]
> > 
> > And herein lies the beauty of the noble meritocratic free software
> > movement.  
> > 
> > If the community needs it, a member of said community has both complete
> > unfettered freedom and a supportive environment to make it.   
> 
> Which is this "supportive environment"?

You're on it.  You drive a car?  You have to treat it right to get what
you want, right?  Same here.  Ask correctly, and you will get your
answers.  

> 
> > Any amount
> > of success at such an endeavor, even a feeble failure of an attempt,
> > would bring kudos the hero who attempts such a feat and possibly
> > organize unfathomable resources in the attendance of such a lofty goal.
> > 
> > Make us proud Ilias.  But whatever you do, don't beg.
> 
> I don't beg.


Really, remember this:

>  " My questions:   a) Why does the Python Foundation not provide
> additionally a binary version, compiled with MinGW or another
> open-source compiler?"

Many languages have the notion of the "rhetorical question."   Also
known as the "loaded question."  Your statement comes across partly as a
challenge, partly as a demand.  In English, American English at least,
if you want to challenge somebody over a perceived failure ask them why
they didn't do it.  English language culutres tend to be very
metrocratic.  American history glorifies the self capable (and somewhat
violent) cowboy.  Austrians have their love of "daisy cutting."  I could
go on, but language carriers its own cultural barriers. 

You didn't intent to, but you begging.   Sure, you save some face by not
obviously groveling, but that only makes the slight worse.  Now somebody
asked that you to read
http://www.catb.org/~esr/faqs/smart-questions.html.   Read it in its
entirety, and come back later.  

Now I have the *real* reason that they didn't do this.  Nobody cares,
except for you.  If you care enough, make the binary package yourself
and give it to the community.  Take home the source, compile it, get it
working, and *you* can become the hero of the Python Foundation that
provides this service.  Being that you have a need, if the binaries you
want don't just appear, it can either be assumed that you don't care
enough, or have the ability to do the work yourself.

Even if you fail miserably, come back, tell us what you tried, how you
failed, and the denizens of this site will happily (try to) guide you.

Good luck getting what you want by trolling.

Adam DePrince 




From jfj at freemail.gr  Sat Feb 19 14:50:45 2005
From: jfj at freemail.gr (jfj)
Date: Sat, 19 Feb 2005 11:50:45 -0800
Subject: lambda closure question
In-Reply-To: <1108802613.284686.200170@o13g2000cwo.googlegroups.com>
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
Message-ID: <42179895.6000104@freemail.gr>

Carl Banks wrote:
> Ted Lilley wrote:
> 
> 
>>Unfortunately, it doesn't work.  It seems the closure keeps track of
>>the variable fed to it dynamically - if the variable changes after
>  [...]
>>
>>At least, that's the explanation I'm deducing from this behavior.
> 
> 
> And that's the correct explanation, chief.

> 
> It is intended that way.  As an example of why that is: consider a
> nested function called "printvars()" that you could insert in various
> places within a function to print out the value of some local variable.
>  If you did that, you wouldn't want printvars to print the values at
> the time it was bound, would you?

Allow me to disagree (and start a new "confused with closures" thread:)

We know that python does not have references to variables. To some
newcomers this may seem annoying but eventually they understand the
pythonic way and they do without them. But in the case of closures
python supports references!

Nested functions, seem to do two independent things:
   1) reference variables of an outer local scoope
   2) are functions bound dynamically to constants

These two are independent because in:
##############
def foo():
     def nested():
          print x
     f = nested
     x = 'sassad'
     f()
     x = 'aafdss'
     f()
     return f
##################

once foo() returns there is no way to modify 'x'!
It becomes a kind of constant.

So IMVHO, one will never need both features. You either want to
return a function "bound to a local value" *xor* "use a local
function which has access to locals as if they were globals".

Supposing the default behaviour was that python does what Carl
suggests (closures don't keep track of variables), would there
be an elegant pythonic way to implement "nested functions that
reference variables from their outer scope"? (although if find
this little useful and un-pythonic)

Personally, i think that this is a problem with the way lisp
and other languages define the term "closure". But python is
different IMO, and the ability to reference variables is not
useful.


cheers,

jfj
---------------
# the president


From smitty_one_each at bigfoot.com  Tue Feb  1 21:19:34 2005
From: smitty_one_each at bigfoot.com (Chris Smith)
Date: Tue, 01 Feb 2005 21:19:34 -0500
Subject: [perl-python] string pattern matching
References: <1107290707.549792.199860@c13g2000cwb.googlegroups.com>
	<mailman.1716.1107300060.22381.python-list@python.org>
	<2uWdnWyp5M1Fip3fRVn-sQ@rogers.com>
	<mailman.1717.1107302883.22381.python-list@python.org>
Message-ID: <usm4fbt55.fsf@bigfoot.com>

>>>>> Stephen Thorne <stephen.thorne at gmail.com> writes:

    > On Tue, 1 Feb 2005 18:59:18 -0500, Dan Perl <danperl at rogers.com> wrote:
    >> Perhaps someone will write a program to automatically follow up
    >> on every [perl-python] posting?  The follow-up could just
    >> contain a statement like the one Daniel mentions.  Obviously
    >> the program would be written in python.  ;-)
    >> 
    >> Any suggestions on how to implement such a program?  How would
    >> it detect a new posting?  How would it send the follow-up?
    >> 
    >> Anyway, I agree with Daniel and I think that would not only
    >> warn newcomers to the group, but it would also allow many of us
    >> to move on without worrying about the effect that the
    >> perl-python postings may have on these newcomers.

    > I'd just like the python-list at python.org mailing list to drop
    > his posts on the floor so I don't have to read them.

    > But thats me.

    > Stephen.

Falls into the 'cure worse than the disease' category.
It's really just a prompt to explore the corners of Gnus, and
determine how to give X.L. the thorough ignoring he deserves.
R,
C 


From just at xs4all.nl  Wed Feb  2 14:09:11 2005
From: just at xs4all.nl (Just)
Date: Wed, 02 Feb 2005 20:09:11 +0100
Subject: XML with Unicode: what am I doing wrong?
References: <mailman.1767.1107368240.22381.python-list@python.org>
	<ctr7ae$ioj$03$1@news.t-online.com>
Message-ID: <just-279A4A.20091102022005@news1.news.xs4all.nl>

In article <ctr7ae$ioj$03$1 at news.t-online.com>,
 "Diez B. Roggisch" <deetsNOSPAM at web.de> wrote:

> > I started out working in the context of elementtidy, but now I am
> > running into trouble in general Python-XML areas, so I thought I'd toss
> > the question out here. The code below is fairly self-explanatory. I have
> > a small HTML snippet that is UTF-8 encoded and is not 7-bit ASCII
> > compatible. I use Tidy to convert it to XHTML, and this particular setup
> > returns a unicode instance rather than a string.
> > 
> > import _elementtidy as et
> > from xml.parsers import expat
> > 
> > data = unicode(open("snippetWithUnicode.html").read(), "utf-8")
> > html = et.fixup(data)[0]
> > parser = expat.ParserCreate()
> > parser.Parse(html)
> > 
> > UnicodeEncodeError: 'ascii' codec can't encode character '\ub5' in
> > position 542: ordinal not in range(128)
> > 
> > If I set my default encoding to utf8 in sitecustomize.py, it works just
> > fine. I'm thinking that I can't be the only one trying to pass unicode
> > to expat... Is there something else I need to do here?
> 
> you confuse unicode with utf8. Expat can parse the latter - the former is
> internal to python. And passing it to something that needs a string will
> result in a conversion - which fails because of the ascii encoding.
> 
> Do this:
> 
> parser.Parse(html.encode('utf-8'))

Possibly preceded by

  parser = expat.ParserCreate('utf-8')

..so there's no confusion with the declared encoding, in case that's not 
utf-8.

Just


From g.brandl-2005-01 at gmx.net  Sat Feb  5 14:40:45 2005
From: g.brandl-2005-01 at gmx.net (Georg Brandl)
Date: Sat, 05 Feb 2005 20:40:45 +0100
Subject: Alternative to standard C "for"
In-Reply-To: <1grj169.v9j8h341mmicN%aleaxit@yahoo.com>
References: <1107628331.816935.16760@o13g2000cwo.googlegroups.com>
	<mailman.1984.1107629393.22381.python-list@python.org>
	<36kjjqF52sv7lU1@individual.net>
	<1grj169.v9j8h341mmicN%aleaxit@yahoo.com>
Message-ID: <36klpkF50i94qU3@individual.net>

Alex Martelli wrote:
> Georg Brandl <g.brandl-2005-01 at gmx.net> wrote:
> 
>> Slight terminology glitch -- it does return an iterator, not a
>> generator. Generators are functions that return iterators.
> 
> xrange returns an ITERABLE, not an ITERATOR.  Videat:
> 
>>>> a = xrange(23, 43)
>>>> a.next()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AttributeError: 'xrange' object has no attribute 'next'
>>>> 
> 
> No next method -> not an iterator.  iter(xrange(...)) DOES return an
> iterator, btw.

Thanks! Somehow it's always these little corrections that contain errors.

And, considering your other posts today, I got away quite well...

Georg


From jerf at jerf.org  Tue Feb  8 08:41:43 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 08 Feb 2005 08:41:43 -0500
Subject: turing machine in an LC
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
	<87mzuf9gu8.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<s9zvf93ovp8.fsf@salmakis.intevation.de>
	<pan.2005.02.08.12.47.00.135408@jerf.org>
	<mailman.2205.1107887101.22381.python-list@python.org>
Message-ID: <pan.2005.02.08.13.41.41.716411@jerf.org>

On Tue, 08 Feb 2005 10:24:28 -0800, Michael Spencer wrote:

> How about:
> 
>  >>> def fact_ge(n):
> ...     f = [1]
> ...     f.extend(i*j for i,j in it.izip(xrange(1,1+n), f))
> ...     return f
> ...
>  >>> fact_ge(10)
> [1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800]
>  >>>
> 
> as a "stateful" genexp?

That's not a generator expression, that's a generator function. Nobody
contests they can reference earlier states, that's most of their point :-)

For context, we're trying to build Turing Completeness into Python without
indentation. I bailed out of a Xah Lee thread because people have
probably killed it :-) and this is entirely unrelated by now, except in
the vague sense he started with an (I'm sure entirely accidentally)
thought-provoking question.


From jyap80 at gmail.com  Sat Feb 12 20:03:45 2005
From: jyap80 at gmail.com (Julian Yap)
Date: Sun, 13 Feb 2005 12:03:45 +1100
Subject: Iterate through dictionary of file objects and file names
In-Reply-To: <cuku8r$q5s$1@eeyore.INS.cwru.edu>
References: <420deb18$1_1@news.iprimus.com.au>
	<cuku8r$q5s$1@eeyore.INS.cwru.edu>
Message-ID: <420EA771.2000403@gmail.com>

Brian Beck wrote:
> File objects as keys sounds pretty dangerous. I'm curious why the first 
> thought that popped into your head wasn't using the file NAMES as keys 
> instead? Here's my go at it. (Is Google Groups nice to indentation using 
> spaces? I can't remember.)
> 
> optionalFiles = dict.fromkeys(['areacode.11', 'build.11'], None)
> 
> # To open optionalFiles...
> for fileName in optionalFiles:
>     try:
>         optionalFiles[fileName] = open(fileName, "r")
>         print "Opened: %s" % fileName
>     except IOError:
>         # Values are already initialized to None.
>         print "File not found: %s" % fileName
> 
> # To close optionalFiles...
> for fileName, fileObject in optionalFiles.iteritems():
>     if fileObject:
>         fileObject.close()
>         print "Closed: %s" % fileName
>         # Rebinding fileObject here won't modify the dictionary,
>         # so access it through the key.
>         optionalFiles[fileName] = None

Brain,
Thanks for your help.  I never thought of it like that.

I guess in my original thinking, in the processing of the optional files 
I would start off each code block with something like:

if fileAreaCode:
     ...

But now I can just do:
if optionalFiles['areacode.11']:
     ...

I think I was just too much in the above mindset to think clearly about 
the dictionary.

Using a file object as a key!?  What was I thinking :P

Julian


From gh at ghaering.de  Fri Feb  4 05:31:05 2005
From: gh at ghaering.de (Gerhard Haering)
Date: Fri, 4 Feb 2005 11:31:05 +0100
Subject: Python 2.4 binaries for accessing PostgreSQL from Windows?
In-Reply-To: <1107512690.503191.8820@g14g2000cwa.googlegroups.com>
References: <1107512690.503191.8820@g14g2000cwa.googlegroups.com>
Message-ID: <20050204103105.GB2717@mylene.ghaering.de>

On Fri, Feb 04, 2005 at 02:24:50AM -0800, Frank Millman wrote:
> Hi all
> 
> The subject line says it all.
> 
> I have been using pypgsql to access PostgreSQL from Linux and from
> Windows, and it works fine.
> 
> I am upgrading to Python 2.4. I can recompile pypgsql for Linux, but I
> do not have a Windows compiler. SourceForge has a binary for Python
> 2.3, which is the one I have been using. It does not have one for 2.4.
> 
> I tried the psycopg site, but it does not seem to have binaries at all.
> 
> Does anyone know if either of these will be available in binary form
> for Python 2.4 on Windows?

http://ghaering.de/pypgsql/

These are SSL-enabled dynamically linked and need the PostgreSQL client
libraries installed. I recommend the ones from PgAdmin3, which have SSL
support. They were only tested with these.

-- Gerhard
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From irmen.NOSPAM at xs4all.nl  Mon Feb 14 18:15:07 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Tue, 15 Feb 2005 00:15:07 +0100
Subject: is there a safe marshaler?
In-Reply-To: <7xacq6sqej.fsf@ruckus.brouhaha.com>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<1108051828.483222.62670@z14g2000cwz.googlegroups.com>
	<7xmzu6q4cv.fsf@ruckus.brouhaha.com>
	<4211185b$0$28982$e4fe514c@news.xs4all.nl>
	<7xbramzt1c.fsf@ruckus.brouhaha.com>
	<42112b1e$0$28978$e4fe514c@news.xs4all.nl>
	<7xacq6sqej.fsf@ruckus.brouhaha.com>
Message-ID: <421130ae$0$28984$e4fe514c@news.xs4all.nl>

> Well, ok, if you trust then other end then I think it's enough to just
> authenticate all the pickles (say using hmac.py) without needing
> something as heavyweight as SSL. 

An interesting idea that hadn't crossed my mind yet.
Pyro *does* already have connection authentication that uses md5
(and hmac since 3.5beta) with a shared secret, but after that,
the communication is done in plaintext so to speak.

> If you use SSL you need something
> like m2crypto since the SSL option in the socket module doesn't check
> certificates, IIRC.

I'm using m2crypto for this kind of SSL, yes.
(sadly it has a bug in its API that is triggerd by the current
Pyro version on some platforms like Linux).

>>In fact, this is the reason why I started this thread.
>>I wanted to discover some possibilities to replace pickle
>>by another thing, so that Pyro becomes 'safe' at the wire
>>protocol level.
>>But further discussion on the Pyro mailing list sort of
>>made it clear that this is not desirable.
> 
> 
> Why do you say it's not desirable?  Don't competing protocols like RMI
> try to stay safe from malicious peers?  Why should I not want to
> expose a Pyro service to the internet?  It's a natural thing to want
> to do.

You should not want to expose a Pyro service to the internet because
Python doesn't have Java's security model and sandboxing, that are
used with RMI. Pyro has a few features that are very powerful
but also require the use of intrinsic insecure Python code (namely,
pickle, and marshal).
Just look at the recent security advisory about the XMLRPC server
that comes with Python.... it's much more primitive than Pyro is,
but even that one was insecure.

I wouldn't put a Java RMI server or xyz CORBA server or whatever
kind of unrestricted API open on the internet anyway.
Am I rational or paranoid?

--Irmen


From rbt at athop1.ath.vt.edu  Sun Feb 20 08:36:13 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Sun, 20 Feb 2005 08:36:13 -0500
Subject: How to wrap a class's methods?
In-Reply-To: <111a08n16gu9bb0@corp.supernews.com>
References: <4214f167$0$44618$a1866201@visi.com>
	<Hv-dnZ4dh7oHa4nfRVn-qA@comcast.com>
	<111a08n16gu9bb0@corp.supernews.com>
Message-ID: <4218924D.6060704@athop1.ath.vt.edu>

Jeff Shannon wrote:
> You could probably also do this as a factory function, rather than as a 
> class (also untested!):
> 
> def Wrapper(func):
>     def wrapped(self, *args, **kwargs):
>         s, r = func(self, *args, **kwargs)
>         if s != 'OK':
>             raise NotOK((s,r))
>         return r
>     return wrapped
> 
> I believe that this will be semantically almost equivalent, but 
> conceptually slightly simpler.
> 
> Jeff Shannon

This is a nice example. I have used sub-functions (functions within 
functions) recently with some code, but I've wondered how proper it is 
to do this. Is this type of thing frowned upon?


From sjmachin at lexicon.net  Thu Feb 24 16:27:27 2005
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 25 Feb 2005 08:27:27 +1100
Subject: Canonical way of dealing with null-separated lines?
References: <lcll9efw8l.fsf@gaffa.mit.edu>
	<mailman.3006.1109264015.22381.python-list@python.org>
	<lczmxtpyp3.fsf@gaffa.mit.edu>
	<mailman.3013.1109274671.22381.python-list@python.org>
Message-ID: <b2hs11dsbsu4p8gpon8g5u36o89ldv05eo@4ax.com>

On Thu, 24 Feb 2005 14:51:07 -0500, Christopher De Vries
<devries at idolstarastronomer.com> wrote:

>
>The other modification would be an option to ignore multiple nulls in a row,
>rather than returning empty strings, which could be done in a similar way.
>

Why not leave this to the caller? Efficiency?? Filtering out empty
lines is the least of your worries.

Try giving the callers options to do things they *can't* do
themselves, like a different line-terminator or a buffer size > 2048
[which could well enhance efficiency] or < 10 [which definitely
enhances testing]





From bh at intevation.de  Thu Feb  3 08:59:25 2005
From: bh at intevation.de (Bernhard Herzog)
Date: Thu, 03 Feb 2005 14:59:25 +0100
Subject: Finding user's home dir
References: <5i9rtc.rq31.ln@orion.homeinvalid>
	<mailman.1800.1107419518.22381.python-list@python.org>
	<GcKdnaOlaN41tJ_fRVn-rg@powergate.ca>
Message-ID: <s9zvf99218i.fsf@salmakis.intevation.de>

Peter Hansen <peter at engcorp.com> writes:

> Miki Tebeka wrote:
>>>Hi all, I'm trying to write a multiplatform function that tries to
>>>return the actual user home directory.
>>>...
>> What's wrong with:
>>     from user import home
>> which does about what your code does.
>
> :-)
>
> I suspect he simply didn't know about it.  I didn't either...

The purpose of the user module is executing ~/.pythonrc.py, which may
not desirable.  It definitely shouldn't be done by a library, for
instance.  Also, that the user's home directory is available as
user.home is not documented, and I for one wouldn't want to rely on
that.

   Bernhard

-- 
Intevation GmbH                                 http://intevation.de/
Skencil                                           http://skencil.org/
Thuban                                  http://thuban.intevation.org/


From joele at qalabs.com  Wed Feb  2 11:58:08 2005
From: joele at qalabs.com (Joel Eusebio)
Date: Wed, 2 Feb 2005 08:58:08 -0800
Subject: Newbie Question
In-Reply-To: <pan.2005.02.02.01.47.19.529221@jerf.org>
Message-ID: <20050202165152.A5F521E4003@bag.python.org>

Hi Jeremy & Robey

Acces_log:

172.16.38.6 - - [01/Feb/2005:17:36:14 -0800] "GET /test.py HTTP/1.1" 404 276
"-" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.1.4322)"
172.16.38.6 - - [01/Feb/2005:17:41:44 -0800] "GET /test/mptest.py/formLogin
HTTP/1.1" 404 293 "-" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2;
.NET CLR 1.1.4322)"

Error_log:

[Wed Feb 02 08:55:18 2005] [notice] mod_python: (Re)importing module
'mod_python.publisher'
[Wed Feb 02 08:55:18 2005] [notice] mod_python: (Re)importing module 'test'
with path set to '['/var/www/html']'

Httpd.conf:

LoadModule python_module modules/mod_python.so

#
    Order allow,deny
    Allow from all
    AddHandler mod_python .py
    Options Indexes Includes FollowSymlinks Multiviews
    PythonHandler mod_python.publisher
    PythonDebug On

</Directory>

<Directory /var/www/html/test>
       AddHandler mod_python .py
       AllowOverride None
       PythonHandler mod_python.publisher
       PythonDebug On

Thanks again,

Joel


-----Original Message-----
From: python-list-bounces+joele=qalabs.com at python.org
[mailto:python-list-bounces+joele=qalabs.com at python.org] On Behalf Of Jeremy
Bowers
Sent: Tuesday, February 01, 2005 5:47 PM
To: python-list at python.org
Subject: Re: Newbie Question

On Tue, 01 Feb 2005 17:47:39 -0800, Joel Eusebio wrote:
> Whenever I access test.py from my browser it says "The page cannot be
> found" , I have the file on /var/www/html, what did I miss?
> 
>  Thanks in advance,
> Joel

In general, you will need to post the relevant entries from your Apache
error log and access log. A lot of things can go wrong between your Python
script and final output. 

However, if you're getting a 404, it means that you haven't associated the
URL to the file correctly. Again, a lot of things can prevent this, so
you're also going to need to post the relevant Apache configuration files.
Without that, I can't be any more specific.

I'm also concerned that you are conflating mod_python with Python CGI,
which work completely differently when it comes to associating code to
URLs. In general, you won't access a mod_python script by typing in a
URL to a file; that will either try to run it as a CGI or just display it
(depending on the configuration). But we'll work on this when you post the
necessary information and we can see what you are trying to do.
-- 
http://mail.python.org/mailman/listinfo/python-list



From rbt at athop1.ath.vt.edu  Tue Feb 22 10:00:21 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Tue, 22 Feb 2005 10:00:21 -0500
Subject: searching pdf files for certain info
In-Reply-To: <cvfg5a$6g6$1@news.mch.sbs.de>
References: <cvfdgg$fr0$1@solaris.cc.vt.edu> <cvfg5a$6g6$1@news.mch.sbs.de>
Message-ID: <cvfhe5$lcv$1@solaris.cc.vt.edu>

Andreas Lobinger wrote:
> Aloha,
> 
> rbt wrote:
> 
>> Not really a Python question... but here goes: Is there a way to read 
>> the content of a PDF file and decode it with Python? I'd like to read 
>> PDF's, decode them, and then search the data for certain strings.
> 
> 
> First of all,
> http://groups.google.de/groups?selm=400CF2E3.29506EAE%40netsurf.de&output=gplain 
> 
> still applies here.
> 
> If you can deal with a very basic implementation of a pdf-lib you
> might be interested in
> http://sourceforge.net/projects/pdfplayground
> 
> In the CVS (or the current snapshot) you can find in
> ppg/Doc/text_extract.txt an example for text extraction.
> 
>  >>> import pdffile
>  >>> import pages
>  >>> import zlib
>  >>> pf = pdffile.pdffile('../pdf-testset1/a.pdf')
>  >>> pp = pages.pages(pf)
>  >>> c = zlib.decompress(pf[pp.pagelist[0]['/Contents']].stream)
>  >>> op = pdftool.parse_content(c)
>  >>> sop = [x[1] for x in op if x[0] in ["'", "Tj"]]
>  >>> for a in sop:
>         print a[0]
> 
> Wishing a happy day
>     LOBI

Thanks guys... what if I convert it to PS via printing it to a file or 
something? Would that make it easier to work with?


From deetsNOSPAM at web.de  Mon Feb  7 08:23:35 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 07 Feb 2005 14:23:35 +0100
Subject: Daemon module
References: <1107781381.495504.275960@o13g2000cwo.googlegroups.com>
Message-ID: <36p887F53uj0sU1@individual.net>

Did you see the daemonize recipe in the cookbook? Don't forget to checkout
the comments section.

-- 
Regards,

Diez B. Roggisch


From gry at ll.mit.edu  Thu Feb 17 18:44:40 2005
From: gry at ll.mit.edu (gry at ll.mit.edu)
Date: 17 Feb 2005 15:44:40 -0800
Subject: Postgres COPY Command with python 2.3 pg
In-Reply-To: <slrnd14pe4.dd1.michi@flocke.chester.at>
References: <slrnd14dni.2bu.michi@michi.si.eunet.at>
	<42124f26$0$22499$7b0f0fd3@mistral.news.newnet.co.uk>
	<slrnd14pe4.dd1.michi@flocke.chester.at>
Message-ID: <1108683880.838783.253880@c13g2000cwb.googlegroups.com>

import pg
db = pg.DB('bind9', '192.168.192.2', 5432, None, None, 'named', None)
db.query('create temp table fffz(i int,t text)')
db.query('copy fffz from stdin')
db.putline("3\t'the'")
db.putline("4\t'rain'")
db.endcopy()
db.query('commit')

Note that multiple columns must be separated by tabs ('\t') (unless you
specify "copy mytable with delimiter ...").



From Chris.Lott at gmail.com  Sat Feb  5 02:02:15 2005
From: Chris.Lott at gmail.com (Chris  Lott)
Date: 4 Feb 2005 23:02:15 -0800
Subject: PythonWin and PyWin32
Message-ID: <1107586934.983669.201020@z14g2000cwz.googlegroups.com>

Can someone elaborate for me what the pywin32 project is exactly? Is
PythonWin a replacement for idle? More to the point, do I need to worry
about this as I am learning about Python, since Idle and the Windows
Installer seem to work fine on my XP box?

c



From jfj at freemail.gr  Mon Feb 14 16:45:56 2005
From: jfj at freemail.gr (jfj)
Date: Mon, 14 Feb 2005 13:45:56 -0800
Subject: [newbie] Confused with raise w/o args
Message-ID: <42111C14.9010607@freemail.gr>

Hello.

I am a bit confused with 'raise' without any arguments.
Suppose the testcase below (i hope it's correct!):

##################################
import sys

class A:
   pass

class B:
   pass

def foo():
     try:
       raise B
     except:
       pass

def b1 ():
  try:
     raise A
  except:
     foo ()
  raise		# raises A

def b2 ():
  try:
    raise A
  except:
    try:
        raise B
    except:
	pass
  raise		# raises B

def b3 ():
   foo ()
   raise		# raises B

def b4 ():
  try:
     raise A
  except:
     pass
  foo ()
  raise		# raises A

#
try:
     b1 ()
except:
     print sys.exc_info()

try:
     b2 ()
except:
     print sys.exc_info()

try:
     b3 ()
except:
     print sys.exc_info()

try:
     b4 ()
except:
     print sys.exc_info()
################################

The semantics of raise without arguments are that the exceptions
of the current scope have a higer priority.  That can be seen
in functions b1() and b2(), where although an exception of type
'B' was the last handled by python, b1() raises 'A'.

Although, b3() shows that the exceptions from other scopes *are*
available.

The b4() case demonstrates the confusion better.

IMHO, a more clean operation of raise would be either:
   1) raise w/o args allowed *only* inside an except clause to
      re-raise the exception being handled by the clause.
   2) always re-raise the last exception no matter the scope.

It appears to me that this behaviour is a bit weird and I would
like to ask:  Are the semantics of 'raise w/o args' a result of
python's implementation?  If python was re-designed, would that
be different?  In python 3000, would you consider changing this
and if yes, to what semantics?  May this be changed in 2.5?


Thanks

jfj
-----------------
# don't hold back



From rbt at athop1.ath.vt.edu  Fri Feb  4 15:42:53 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Fri, 04 Feb 2005 15:42:53 -0500
Subject: string issue
In-Reply-To: <mailman.1917.1107549412.22381.python-list@python.org>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>	<36QMd.103084$Jk5.36127@lakeread01>
	<87lla4w0av.fsf@pobox.com>	<cu0ln1$o5t$1@solaris.cc.vt.edu>
	<mailman.1917.1107549412.22381.python-list@python.org>
Message-ID: <4203DE4D.2030400@athop1.ath.vt.edu>

Bill Mill wrote:
> On Fri, 04 Feb 2005 15:25:04 -0500, rbt <rbt at athop1.ath.vt.edu> wrote:
> 
>>John J. Lee wrote:
>>
>>>Steve Holden <steve at holdenweb.com> writes:
>>>[...]
>>>
>>>
>>>>You are modifying the list as you iterate over it. Instead, iterate
>>>>over a copy by using:
>>>>
>>>>for ip in ips[:]:
>>>>  ...
>>>
>>>
>>>Just to help popularise the alternative idiom, which IMO is
>>>significantly less cryptic (sane constructors of mutable objects
>>>almost always make a copy, and list is no exception: it's guaranteed
>>>to do so):
>>>
>>>for ip in list(ips):
>>>   ...
>>>
>>>
>>>Works back to at least Python 1.5.2.
>>>
>>>
>>>John
>>
>>I don't know that that approach is less cryptic. ips is already a
>>list... it looks cryptic to make it a list again, doesn't it? IMO, the
>>two are equally cryptic. The epitome of clarity would be copy(ips)...
>>now *that* makes sense, of course, ips[:] or list(ips) work equally well
>>to the programmer who has learned them.
> 
> 
> Howsabout:
> 
> 
>>>>from copy import copy
>>>>ips = ['255.255.255.255', '128.173.120.79', '198.82.247.98',
> 
> ... '127.0.0.1', '255.0.0.0', '255', '128.173.255.34']
> 
>>>>for ip in copy(ips):
> 
> ...     if '255' in ip:
> ...             ips.remove(ip)
> ...
> 
>>>>ips
> 
> ['128.173.120.79', '198.82.247.98', '127.0.0.1']
> 
> But I still think that the list comprehension is the best.
> 
> Peace
> Bill Mill
> bill.mill at gmail.com

Wow, I did not know that a copy module existed. I made all that up about 
copy being the perfect example here. Great minds think alike ;) I fell 
Guidoish.


From rigga at hasnomail.com  Sun Feb 27 12:51:24 2005
From: rigga at hasnomail.com (Rigga)
Date: Sun, 27 Feb 2005 17:51:24 GMT
Subject: Need help running external program
References: <c2nUd.3268977$B07.514197@news.easynews.com>
	<cvsvbb$nne$01$1@news.t-online.com>
Message-ID: <vMnUd.3552914$f47.637318@news.easynews.com>

Pink wrote:

> Rigga wrote:
> 
>> Hi,
>> 
>> I am running the line of code below from a shell script and it works
>> fine, however I am at a total loss on how i can run it from within a
>> Python script as every option I have tried fails and it appears to be
>> down to the escaping of certain characters.
>> 
>> wget -q www.anywebpage.com -O - | tr '\r' '\n' | tr \' \" | sed -n
>> 's/.*url="\([^"]*\)".*/\1/p'
> If your problem is getting a python string without worrying about how to
> escape the escape sequences, try:
> 
> r"""wget -q www.anywebpage.com -O - | tr '\r' '\n' | tr \' \" | sed -n
> 's/.*url="\([^"]*\)".*/\1/p'"""
> 
> You should be able to pass this directly to a popen() function.

Hi,

Thanks for replying however I have just tried that and it does not seem to
work, it doesnt return any results (i take it the r was a typo)

Thanks

RiGGa


From peter at engcorp.com  Mon Feb 28 07:23:26 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 28 Feb 2005 07:23:26 -0500
Subject: Problem When Unit Testing with PMock
In-Reply-To: <1109579739.175344.105600@z14g2000cwz.googlegroups.com>
References: <1109423274.660110.156140@f14g2000cwb.googlegroups.com>
	<1109483520.813509.171880@f14g2000cwb.googlegroups.com>
	<mailman.3122.1109540262.22381.python-list@python.org>
	<1109579739.175344.105600@z14g2000cwz.googlegroups.com>
Message-ID: <78edneIr3oagkL7fRVn-jQ@powergate.ca>

steven at lczmsoft.com wrote:
> Peter,
> 
> for a object foo who need a iterator to do a job,  i write test to make
> sure the foo correctlly used the iterator, so a simple empty iterator
> is not enough.  because in the case, i need to see if or not the foo
> called the iterator to get the proper data from it and do the proper
> translating on them.  so, the mock iterator i need should be such an
> iterator which can returns be iterated out a lot of test data as i
> willed.

See Terry's reply which referenced my posting to better understand
the point I was making.

> i guess you are not familar with unit testing.  

Your guess is wrong.

> we need mock objects
> not because they are hard to implemented, we need them to make the
> tests easy and fine.

Thanks for the tutorial. :-) I'm rather well acquainted
with unit testing and mock objects.

My point was merely that what Terry suggested did not act the
way I thought he was proposing that it acted, and I was
hoping to correct that.  Not having actually read and understood
your entire original question, I didn't know at the time and
still don't know what you *really* need, just that Terry's
suggestion looked like a bit of a brain fart. :-)

For what it's worth, I tend to be of the school that says that
overuse of mock objects is a "testing smell", and as part of
acting on that belief I avoid using generic mock objects.
Instead, I write minimal ones which are carefully customized
for a particular test, to make sure that the resulting mock
object's code clearly tells a reader of the test exactly what
it is trying to accomplish.  Generic mocks, on the other hand,
tend to get overused and rarely make the tests very readable,
IMHO.

-Peter


From ncoghlan at iinet.net.au  Fri Feb  4 08:18:32 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 04 Feb 2005 23:18:32 +1000
Subject: Why does super() require the class as the first argument?
In-Reply-To: <20050203140230680-0500@braeburn.themorgue.org>
References: <20050203140230680-0500@braeburn.themorgue.org>
Message-ID: <42037628.2040305@iinet.net.au>

Kevin Smith wrote:
> I can create a super() that does this as follows:
> 
> _super = super
> def super(obj, cls=None):
>     if cls is None:
>         return _super(type(obj), obj)
>     return super(cls, obj)
> 
> I guess I'm just not sure why it wasn't done that way in the first place.
> 

Because it doesn't work. As Chris pointed out, it leads to infinite recursion:

Py> class A(object):
...   def blow_the_stack(self):
...     print "Well, not yet"
...
Py> class B(A):
...   def blow_the_stack(self):
...     print "Perhaps here"
...     super(type(self), self).blow_the_stack()
...
Py> class C(B):
...   pass
...
Py> A().blow_the_stack()
Well, not yet
Py> B().blow_the_stack()
Perhaps here
Well, not yet
Py> C().blow_the_stack()
Perhaps here
<infinite recursion traceback snipped>
   File "<stdin>", line 4, in blow_the_stack
RuntimeError: maximum recursion depth exceeded

Basically, the first argument to super() says "find this type in the supplied 
objects method resolution order, and then move on to the next type in the 
order". Getting this wrong (e.g. by providing a type earlier in the MRO, as 
B.blow_the_stack does by providing type(C()) above) is what leads to the 
infinite recursion.

It *is* possible to eliminate the explicit class argument, but it takes a bit 
(*cough*) of work:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/286195

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From nav+posts at bandersnatch.org  Fri Feb 18 08:18:05 2005
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: Fri, 18 Feb 2005 08:18:05 -0500
Subject: [OT]: Re: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<37hqlrF59l2b2U1@individual.net>
	<873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<421450CC.9080504@swiftdsl.com.au>
	<87psyz8h9o.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<4214A800.4010509@swiftdsl.com.au>
	<pan.2005.02.17.15.13.36.917107@jerf.org>
	<42155DAF.4010806@swiftdsl.com.au>
	<87hdka8rbc.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<42158831.9040207@swiftdsl.com.au>
Message-ID: <87d5uy80s2.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>

"news.sydney.pipenetworks.com" <nytimes at swiftdsl.com.au> writes:

> I'm sure theres got to be a few copy cats in those 12 though.

Those that don't come up with original answers alter the existing
ones a bit and call it their own.

> Does that mean you just haven't had time to finish ? or you have been
> studying philosophy for 15 years ?

Sort of an extended break, really. Every year I plan to finish up, but
then can't find the time and/or money to do it.

Nick

-- 
#  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this to a python
print reduce(lambda x,y:x+chr(ord(y)-1),' Ojdl!Wbshjti!=obwAcboefstobudi/psh?')


From duncan.booth at invalid.invalid  Thu Feb 24 05:57:37 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 24 Feb 2005 10:57:37 GMT
Subject: LC_ALL and os.listdir()
References: <mailman.2959.1109142240.22381.python-list@python.org>
	<421cf088$0$8788$9b622d9e@news.freenet.de>
	<cvitch$111q$1@news.comcor-tv.ru>
	<421cff55$0$16589$9b622d9e@news.freenet.de>
Message-ID: <Xns96076F2D5A37Bduncanrcpcouk@127.0.0.1>

Martin v. L?wis wrote:

> Serge Orlov wrote:
>> Shouldn't os.path.join do that? If you pass a unicode string
>> and a byte string it currently tries to convert bytes to characters
>> but it makes more sense to convert the unicode string to bytes
>> and return two byte strings concatenated.
> 
> Sounds reasonable. OTOH, this would be the only (one of a very
> few?) occasion where Python combines byte+unicode => byte.
> Furthermore, it might be that the conversion of the Unicode
> string to a file name fails as well.
> 
> That said, I still think it is a good idea, so contributions
> are welcome.
> 
It would probably mess up those systems where filenames really are unicode 
strings and not byte sequences.

Windows (when using NTFS) stores all the filenames in unicode, and Python 
uses the unicode api to implement listdir (when given a unicode path). This 
means that the filename never gets encoded to a byte string either by the 
OS or Python. If you use a byte string path than the filename gets encoded 
by Windows and Python just returns what it is given.


From tego at adresu.nie.ma  Fri Feb  4 13:29:30 2005
From: tego at adresu.nie.ma (=?ISO-8859-1?Q?Maciej_Mr=F3z?=)
Date: Fri, 04 Feb 2005 19:29:30 +0100
Subject: OT: why are LAMP sites slow?
In-Reply-To: <YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
Message-ID: <cu0e33$jp6$1@achot.icm.edu.pl>

Kartic wrote:
> Paul Rubin said the following on 2/3/2005 7:20 PM:
> 
>> LAMP = Linux/Apache/MySQL/P{ython,erl,HP}.  Refers to the general
>> class of database-backed web sites built using those components.  This
>> being c.l.py, if you want, you can limit your interest to the case the
>> P stands for Python.
>>
>> I notice that lots of the medium-largish sites (from hobbyist BBS's to
>> sites like Slashdot, Wikipedia, etc.)  built using this approach are
>> painfully slow even using seriously powerful server hardware.  Yet
>> compared to a really large site like Ebay or Hotmail (to say nothing
>> of Google), the traffic levels on those sites is just chickenfeed.
>>
> 
> If you are talking about Wikipedia as a prime example, I agree with you 
> that it is *painfully* slow.
> 
> And the reason for that I probably because of the way the language is 
> used (PHP) (this is a shot in the dark as I have not looked into 
> Mediawiki code), and compounded by probably an unoptimized database. I 
> don't want to start flame wars here about PHP; I use PHP to build client 
> sites and like it for the "easy building of dynamic sites" but the 
> downside is that there is no "memory"...every page is compiled each time 
> a request is made. I doubt if Wikipedia site uses an optimizer (like 
> Zend) or caching mechanisms. Optimizers and/or PHP caches make a huge 
> performance difference.

Mmcache (which is both optimizer and shared memory caching library for 
php) can do _miracles_. One of my company servers uses Apache 
1.3/php/mmcache to serve about 100 GB of dynamic content a day (it could 
do more but website does not have enough visitors to stress it :) ).
There's also memcached, much more of interest to readers of this list - 
iirc it has Python API.


From ilias at lazaridis.com  Thu Feb  3 02:26:08 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Thu, 03 Feb 2005 09:26:08 +0200
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
Message-ID: <ctsjmg$75p$1@usenet.otenet.gr>

"
A cooperation between Sun Microsystems and IBM&Co. in conjunction with
liberal & high evolutive communities would result in an nearly
unbeatable programming platform.

My evaluation has shown: this is a non achievable goal, as stubborness
and egoism rules - instead of reason and cooperation.

Thus I leave all those ridiculous folks behind, which will continue to
do an excellent job in keeping the very promising JAVA platform far
below the technological level it could be
"

-

"
Of course It's a sad day.

Censorship (NetBeans, Eclipse) has forced me to move.

No platform is _really_ open, thus I cannot build on them:

http://lazaridis.com/core/project/open.html
"

-

"I'm sure there is one community out there which will realize immediatly 
the benefits of an high-evolutive system. "

-

source: [messages within thread]

[JAVA] [EVALUATION] - The Java Failure (Sorry: The Java(tm) Failure)
http://groups-beta.google.com/group/comp.lang.java.softwaretools/msg/ae6315fda51d50a1

-
-
-

During the 6 months evaluation i've extracted several constructs.

"How it should be to become high evolutive"

-

I don't know python.

Basicly I would like to do everything in C++.

But development must go quicker.

-

I've seen that Nokia has just integrated Python it in a platform.

-

Possibly it's time to structure python projects in a way similar to 
Sun's Java, NetBeans and especially IBM&Co's Eclipse (but of course more 
efficient and evolutive):

http://lazaridis.com/case/ide/project/index.html

www.osgi.org and similar standards should (whenever possible) be used.

E.g. Nokia should be intrested in an python osgi implementation.

[Note: i've not verified technical and legal applicability]

-

osgi is just a detail.

The goal would be: to make a high competitive andhigh evolutive 
programming platform / Rich Client Platform based on Python.

-

My question is essentially:

How many of those constructs are already supported by python (and the 
surrounding open-source-projects):

http://lazaridis.com/case/stack/index.html

-

I'll be possibly for some time off-line, as the evaluation has brought 
me to my financial limits, thus i'm loosing my phone-line in a few hours.

I'll try to communicate via internet-cafe, but cannot promise this.

-

Please notify the people within the relevant python communities about 
this thread.

.

-- 
http://lazaridis.com


From aleaxit at yahoo.com  Sat Feb  5 13:04:55 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 5 Feb 2005 19:04:55 +0100
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<mailman.1975.1107621941.22381.python-list@python.org>
Message-ID: <1grixdp.1ttyiwh1m4ydsiN%aleaxit@yahoo.com>

Nick Coghlan <ncoghlan at iinet.net.au> wrote:

> Alex Martelli wrote:
> > 'global' is an ugly wart, to all intents and purposes working "as if" it
> > was a declaration.  If I had to vote about the one worst formal defect
> > of Python, it would surely be 'global'.
> > 
> > Fortunately, it's reasonably easy to avoid the ugliness, by avoiding
> > rebinding (within functions) global variables, which tend to be easy.
> 
> Hear, hear! And if I could write "gbls = namespace(globals())" in order to
> deal with those rare cases where I *do* need to rebind globals, all uses
> of the keyword could be handled nicely, while entirely eliminating the
> need for the keyword itself.

I entirely agree with you on this.


> Would you be as violently opposed to a 'rebinding' augmented assignment
operator?

Not at all.  The only downside I can see, and it seems a minor one to
me, is having two "obvious ways" to re-bind a name, since '=' would keep
working for the purpose.  But making it explicit that one IS rebinding a
name rather than binding it anew could sometimes make certain code more
readable, I think; quite apart from possible advantages in catching
typos (which may be OK, but appear minor to me), the pure gain in
reaability might make it worth it.  Call my stance a +0.

> the problem of detecting typos in the right-most name in a compound name
(e.g.

It's not clear to me what semantics, exactly, x.y := z would be defined
to have (assuming := is the syntax sugar for ``rebinding'').  Perhaps,
by analogy with every other augmented operator, it should be equivalent
to:

    _temp = x.y
    x.y = type(temp).__irebind__(temp, z)

This makes it crystal-clear what happens when type(x).y is a descriptor
with/without __set__ and __get__, when type(x) defines __getattribute__
or __setattr__, etc, etc.  Giving type object an __irebind__ which just
returns the second operand would complete the semantics.  Of course,
doing it this way would open the issue of types overriding __irebind__,
and it's not clear to me that this is intended, or desirable.  So, maybe
some other semantics should be the definition.  But since "rebinding" is
not a primitive, the semantics do need to be somehow defined in terms of
elementary operations of getting and setting (of attributes, items, &c).

> Did I mention the possible incidental benefit of reducing the whinging
> about the lack of variable declarations?

It might, with some luck;-).  Probably worth a PEP, although I suspect
it will not be considered before 3.0.


Alex


From nospam at me.invalid  Mon Feb 28 20:07:29 2005
From: nospam at me.invalid (anthonyberet)
Date: Tue, 01 Mar 2005 01:07:29 +0000
Subject: TKinter
In-Reply-To: <_WGUd.36575$%U2.4921@lakeread01>
References: <38eb4lF5nldh7U1@individual.net> <_WGUd.36575$%U2.4921@lakeread01>
Message-ID: <38htioF5pbgdhU2@individual.net>

Steve Holden wrote:
> anthonyberet wrote:
> 
>> So, is it pronounced 'Tee-Kinter', or 'Tee-Kay-Inter'?
>> I don't want to appear as a dork down the pub.
> 
> 
> If anyone down your pub knows enough about Python to understand what 
> TKinter is I very much doubt they'll be rude enough to call you a dork 
> for displaying your ignorance.
> 
> that's-my-kind-of-pub-ly y'rs  - steve

I have never recovered from the time I said 'Lye-Nux' and 'Ess-Kyoo-Ell' 
in the same evening ;|)


From jerf at jerf.org  Fri Feb 11 08:12:44 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 11 Feb 2005 08:12:44 -0500
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<4207c8db$0$21623$a1866201@visi.com>
	<cub12p$pke$1@achot.icm.edu.pl>
	<36sip2F56jjmaU1@individual.net> <umzubw8xg.fsf@vh-s.de>
	<pan.2005.02.11.11.43.56.884015@jerf.org>
	<374826F5851cbU1@individual.net>
Message-ID: <pan.2005.02.11.13.12.44.276464@jerf.org>

On Fri, 11 Feb 2005 18:24:22 +0100, Damjan wrote:
> What you described is not ok according to the GPL - since you distributed
> a binary thats derived from GPL software (and you didn't publish it source
> code under the GPL too).

No you didn't. You distributed a binary completely free of any GPL code
whatsoever. The *user* combined your binary and the GPL to produce another
binary, which will never be distributed at all.

In copyright terms, which is what the GPL works under since that is the
law it has, what you distributed is completely unrelated to the GPL'ed
program; there's no grounds to call it "derived".

You may need to re-read the sequence more carefully, or I may have gotten
it wrong.


From stephen.thorne at gmail.com  Tue Feb  1 21:25:48 2005
From: stephen.thorne at gmail.com (Stephen Thorne)
Date: Wed, 2 Feb 2005 12:25:48 +1000
Subject: [perl-python] string pattern matching
In-Reply-To: <usm4fbt55.fsf@bigfoot.com>
References: <1107290707.549792.199860@c13g2000cwb.googlegroups.com>
	<mailman.1716.1107300060.22381.python-list@python.org>
	<2uWdnWyp5M1Fip3fRVn-sQ@rogers.com>
	<mailman.1717.1107302883.22381.python-list@python.org>
	<usm4fbt55.fsf@bigfoot.com>
Message-ID: <3e8ca5c80502011825218dfb8a@mail.gmail.com>

On Tue, 01 Feb 2005 21:19:34 -0500, Chris Smith
<smitty_one_each at bigfoot.com> wrote:
> Falls into the 'cure worse than the disease' category.
> It's really just a prompt to explore the corners of Gnus, and
> determine how to give X.L. the thorough ignoring he deserves.

*headdesk*

I'm using gmail, and I can set up the filter trivially
(from:xah at xahlee.org -> delete), but I just wasn't thinking clearly. I
was cursing not having the ability to use a procmail filter while the
solution was right in front of me.

Regards,
Stephen.


From deetsNOSPAM at web.de  Tue Feb  8 09:43:49 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Tue, 08 Feb 2005 15:43:49 +0100
Subject: [perl-python] text pattern matching, and expressiveness
References: <1107802850.999843.260520@c13g2000cwb.googlegroups.com>
	<Xns95F6917BFEEF4castleamber@130.133.1.4>
	<mailman.2185.1107873321.22381.python-list@python.org>
Message-ID: <36s1acF53kdejU1@individual.net>

> He (XL) is a troll and admits it.  If only he would include that
> information up-front in his (IMO worthless) [perl-python] posts, it would
> save a lot of effort.

He does - all of his posts start with [perl-python]. Now the big question is
which community comes up with a better/nicer/shorter/whatever filter -
pythonistas or perljunkies.

-- 
Regards,

Diez B. Roggisch


From sjmachin at lexicon.net  Mon Feb 21 19:45:53 2005
From: sjmachin at lexicon.net (John Machin)
Date: 21 Feb 2005 16:45:53 -0800
Subject: Accessing files installed with distutils
In-Reply-To: <mailman.2906.1109026485.22381.python-list@python.org>
References: <mailman.2906.1109026485.22381.python-list@python.org>
Message-ID: <1109033153.630066.175360@g14g2000cwa.googlegroups.com>


Frans Englich wrote:
> This is silly. How do I access data files I've installed with
distutils? In a
> portable, generic way, I want to find out what is the following path
on most
> systems:
>
> /usr/local/lib/python2.4/lib/site-packages/foo/bar.txt

Most systems? A tad *nix-centric, yes/no?

>
> How do I figure out the rest, if I know foo/bar.txt? sys.prefix
doesn't get me
> far.

This hint may be useful:

>>> import sys
>>> sys.modules['readline'].__file__
'c:\\Python24\\lib\\site-packages\\readline\\__init__.pyc'

but it may not work if the caller does "from yourmodule import ....."
or "import yourmodule as ym". Over to you.



From xah at xahlee.org  Wed Feb  9 13:06:56 2005
From: xah at xahlee.org (Xah Lee)
Date: 9 Feb 2005 10:06:56 -0800
Subject: python code with indention
In-Reply-To: <110hq18fbebn0b1@news.supernews.com>
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
	<110hq18fbebn0b1@news.supernews.com>
Message-ID: <1107972416.931714.256210@l41g2000cwc.googlegroups.com>

i thought it is trivial for the Python parser to spit out a version
with matching brackets. Similarly, perhaps some opensourcing student
has modified a parser to read in a matching brackets delimited version
of Python.

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From john_sips_teaz at yahooz.com  Thu Feb 17 11:35:06 2005
From: john_sips_teaz at yahooz.com (John)
Date: Thu, 17 Feb 2005 11:35:06 -0500
Subject: difference between class methods and instance methods
In-Reply-To: <37juh3F5d511mU1@individual.net>
References: <pan.2005.02.17.07.04.37.907754@yahooz.com>
	<Xns96005FE3164DAduncanrcpcouk@127.0.0.1>
	<1119g2rre5g610c@corp.supernews.com>
	<37juh3F5d511mU1@individual.net>
Message-ID: <1119htp837s5b9f@corp.supernews.com>

Diez B. Roggisch wrote:
> John wrote:
> 
>>... hmm... bound methods get created each time you make
>>a call to an instance method via an instance of the given class?
> 
> 
> No, they get created when you create an actual instance of an object. So
> only at construction time. Creating them means taking the unbound method
> and binding the created object as first argument to the method. Thus each
> instance of a class Foo with a method bar has its own instance of bar - the
> bound method bar. But only one per object. 
> 
> 

Ohhhhhhhh. Unlike C++, where methods are not first class objects
and you only have *one* that gets shared by all instances.

I'm getting it. Thanks for the reply. :)

---J

-- 
--- remove zees if replying via email ---


From pecora at anvil.nrl.navy.mil  Mon Feb  7 16:59:33 2005
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Mon, 07 Feb 2005 16:59:33 -0500
Subject: [noob] Questions about mathematical signs...
References: <614c778e.0502061226.5f40244c@posting.google.com>
	<v0wNd.104851$Jk5.6276@lakeread01>
Message-ID: <pecora-BE9B01.16593307022005@ra.nrl.navy.mil>

In article <v0wNd.104851$Jk5.6276 at lakeread01>,
 Steve Holden <steve at holdenweb.com> wrote:

> > 2. Inputing fractions like (a / b) + (c / d), It's tiring work too.
> >    Can it be simplified?

Can't this just be written as   a/b+c/d ?  How much simpler can it get?  
I would think you need at least one symbol per operation (ignoring 
possible algebraic simplifications and transformations for some 
expressions).

-- Lou Pecora  (my views are my own)


From mwm at mired.org  Thu Feb 17 20:34:58 2005
From: mwm at mired.org (Mike Meyer)
Date: Thu, 17 Feb 2005 19:34:58 -0600
Subject: [Fwd: Re: [Uuu-devel] languages] <-- Why Python
References: <mailman.2781.1108677768.22381.python-list@python.org>
	<1108678805.542584.171930@z14g2000cwz.googlegroups.com>
	<mailman.2783.1108679758.22381.python-list@python.org>
	<864qgaisoq.fsf@guru.mired.org>
	<mailman.2785.1108689484.22381.python-list@python.org>
Message-ID: <86vf8qhcql.fsf@guru.mired.org>

Arich Chanachai <macrocosm at fastmail.fm> writes:
> Mike Meyer wrote:
>>Arich Chanachai <macrocosm at fastmail.fm> writes:
>>>These last two points kind of diverge from the point, no?  What I mean
>>>is that we want to present the argument of why Python is the best
>>>choice as THE built-in programming language for the revolutionary uuu
>>>operating system.
>>
>>A new operating system shouldn't be picking "THE" built-in programming
>>language. It should instead be providing mechanisms to allow arbitrary
>>programming languages to be used wherever they are required. Tying the
>>users of the OS - or of some application - down to a specific language
>>is a disservice to the developers and users of that OS or application.
>>
>>While Python is an excellent language, and has a nice implementation
>>for embedding/extending applications, it's not necessarily the best
>>choice for all problems. You're be doing much better for your users to
>>allow them to choose the right language for the problem than to
>>dictate the language that has to be used.
>>
> There is no intention to dictate, but instead to provide
> out-of-the-box, built-into-the-architecture support for a single
> language or a wide array of languages.  For now, this will begin with
> a single language and the question is merely which one.

Whatever the intentions may be, the *act* is one of dictation. Since
the point of the underlying OS is to increase the interconnections
between applications (assuming I've found the correct web page and
interpreted it correctly), the underlying architecture should be
language-neutral. That allows as many applications as possible to play
in the environment.

I did this with CORBA (see http://www.mired.org/home/mwm/scripting/ )
just to show that Unix can play in this arena as well as various
desktop OS's. Plan 9 provides a much better mechanism that allows any
programming language that can do file I/O to be used for building
interconnections.

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From exogen at gmail.com  Wed Feb 16 07:50:08 2005
From: exogen at gmail.com (Brian Beck)
Date: Wed, 16 Feb 2005 07:50:08 -0500
Subject: super not working in __del__  ?
In-Reply-To: <Xns95FF6448A6AB0duncanrcpcouk@127.0.0.1>
References: <cuu0pu$t44$1@sea.gmane.org>
	<mailman.2678.1108537188.22381.python-list@python.org>
	<Xns95FF5DA14D6F0duncanrcpcouk@127.0.0.1>
	<hjgbe2-vqe.ln1@pluto.i.infosense.no>
	<Xns95FF6448A6AB0duncanrcpcouk@127.0.0.1>
Message-ID: <cuvfng$16p$1@eeyore.INS.cwru.edu>

Duncan Booth wrote:
> There was one, but for some reason you trimmed it out of your quote:
> 
> The original code before you trimmed it was:

Look carefully, he was commenting on the contents of class Base (which 
does omit the line he suggests), not class B. Whether he's correct or 
not, I'm not wizardly enough to comment on.

--
Brian Beck
Adventurer of the First Order


From invalidemail at aerojockey.com  Thu Feb  3 16:05:51 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 3 Feb 2005 13:05:51 -0800
Subject: remove duplicates from list *preserving order*
In-Reply-To: <BfmdnTjWquaJEZ_fRVn-3A@comcast.com>
References: <BfmdnTjWquaJEZ_fRVn-3A@comcast.com>
Message-ID: <1107464751.891049.45580@c13g2000cwb.googlegroups.com>


Steven Bethard wrote:
> I'm sorry, I assume this has been discussed somewhere already, but I
> found only a few hits in Google Groups...  If you know where there's
a
> good summary, please feel free to direct me there.
>
>
> I have a list[1] of objects from which I need to remove duplicates.
I
> have to maintain the list order though, so solutions like set(lst),
etc.
> will not work for me.  What are my options?  So far, I can see:
>
> def filterdups(iterable):
>      result = []
>      for item in iterable:
>          if item not in result:
>              result.append(item)
>      return result
>
> def filterdups(iterable):
>      result = []
>      seen = set()
>      for item in iterable:
>          if item not in seen:
>              result.append(item)
>              seen.add(item)
>      return result
>
> def filterdups(iterable):
>      seen = set()
>      for item in iterable:
>          if item not in seen:
>              seen.add(item)
>              yield item
>
> Does anyone have a better[2] solution?
>
> STeve
>
> [1] Well, actually it's an iterable of objects, but I can convert it
to
> a list if that's helpful.
>
> [2] Yes I know, "better" is ambiguous.  If it helps any, for my
> particular situation, speed is probably more important than memory,
so
> I'm leaning towards the second or third implementation.


from itertools import *
[ x for (x,s) in izip(iterable,repeat(set()))
  if (x not in s,s.add(x))[0] ]


that's-one-ambiguously-better-solution-ly yr's,

-- 
CARL BANKS



From fperez.net at gmail.com  Fri Feb  4 14:49:39 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Fri, 04 Feb 2005 12:49:39 -0700
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot>
	<1107487113.732375.110850@c13g2000cwb.googlegroups.com>
	<opslnmywarej1m1c@ashot>
	<mailman.1865.1107491434.22381.python-list@python.org>
	<opsln54fpwej1m1c@ashot> <36hculF51ho2sU1@individual.net>
	<1107530489.308497.103530@g14g2000cwa.googlegroups.com>
	<36hrjpF4ui8fbU1@individual.net>
Message-ID: <cu0jj2$doj$2@sea.gmane.org>

Claudio Grondi wrote:

> I use this one,
> http://heanet.dl.sourceforge.net/sourceforge/uncpythontools/readline-1.7.win
> 32.exe
> which I assume is the right one.

Try version 1.8, some coloring problems have been recently fixed.  If that
doesn't do it, let me know and I'll try to get in touch with the author to see
if he can help.

Cheers,

f



From sjmachin at lexicon.net  Sun Feb 20 13:35:58 2005
From: sjmachin at lexicon.net (John Machin)
Date: 20 Feb 2005 10:35:58 -0800
Subject: intersection of 2 list of pairs
In-Reply-To: <1108920276.253388.23590@f14g2000cwb.googlegroups.com>
References: <1108920276.253388.23590@f14g2000cwb.googlegroups.com>
Message-ID: <1108924558.626343.55810@f14g2000cwb.googlegroups.com>


les_an... at yahoo.com wrote:
> Hi,
> I have 2 lists of tuples that look like:
> E1=[('a','g'),('r','s')] and
> E2=[('g','a'),('r','q'),('f','h')].
> In this tuple, the ordering does not
> matter, i.e. (u,v) is the same as (v,u).
>
> What I want to do is the following:
> given 2 list of tuples, E1 and E2, I want to create another list with
> tuples that are common to both. So in the above example I would like
> to return ('a','g') as being common.
> So far I have the code below but it does not work out properly, I
would
> be grateful if someone can help me out .
[snip]

This is likely to do what you want, provided the types of the objects
in your tuples define an ordering. The idea is to change the
representation of the tuples to a canonical form (a, b) where a <= b.
By the way, have you considered that there might be duplicates *within*
each list?

>>> E1=[('a','g'),('r','s')]
>>> E2=[('g','a'),('r','q'),('f','h')]
>>> s1 = set((min(x,y),max(x,y)) for x, y in E1)
>>> s1
set([('a', 'g'), ('r', 's')])
>>> s2 = set((min(x,y),max(x,y)) for x, y in E2)
>>> s2
set([('a', 'g'), ('q', 'r'), ('f', 'h')])
>>> answer = s1 & s2
>>> answer
set([('a', 'g')])
>>>

Here's a hint: when you find yourself typing stuff like (x[0],x[1])
.... (x[1],x[0]) more than minimally, the 'wrong way, go back' sign
should flash up.

HTH,

John



From brian at sweetapp.com  Fri Feb 11 08:51:41 2005
From: brian at sweetapp.com (Brian Quinlan)
Date: Fri, 11 Feb 2005 14:51:41 +0100
Subject: Is this a bug? BOM decoded with UTF8
In-Reply-To: <373p8vF57039vU1@individual.net>
References: <epMOd.357$7m.215@read3.inet.fi>	<420bc317$0$4925$9b622d9e@news.freenet.de>	<KT1Pd.641$gz1.258@read3.inet.fi>
	<373p8vF57039vU1@individual.net>
Message-ID: <420CB86D.9090601@sweetapp.com>

Diez B. Roggisch wrote:
>>I know its easy (string.replace()) but why does UTF-16 do
>>it on its own then? Is that according to Unicode standard or just
>>Python convention?
> 
> 
> BOM is microsoft-proprietary crap. UTF-16 is defined in the unicode
> standard.

What are you talking about? The BOM and UTF-16 go hand-and-hand. 
Without a Byte Order Mark, you can't unambiguosly determine whether big 
or little endian UTF-16 was used. If, for example, you came across a 
UTF-16 text file containing this hexidecimal data: 2200

what would you  assume? That is is quote character in little-endian 
format or that it is a for-all symbol in big-endian format?

For more details, see:
http://www.unicode.org/faq/utf_bom.html#BOM

Cheers,
Brian


From jgrahn-nntq at algonet.se  Fri Feb 25 16:42:44 2005
From: jgrahn-nntq at algonet.se (Jorgen Grahn)
Date: 25 Feb 2005 21:42:44 GMT
Subject: Dealing with config files what's the options
References: <mailman.2952.1109122710.22381.python-list@python.org>
Message-ID: <slrnd1v6rp.nhu.jgrahn-nntq@frailea.sa.invalid>

On Tue, 22 Feb 2005 20:38:28 -0500, Tom Willis <tom.willis at gmail.com> wrote:
> How are the expert pythoneers dealing with config files?
...
> Any ideas?

How about writing them in Python?

I have no URL handy, but it would surprise me if there wasn't a lot written
about different techniques for doing this.

/Jorgen

-- 
  // Jorgen Grahn <jgrahn@       Ph'nglui mglw'nafh Cthulhu
\X/                algonet.se>   R'lyeh wgah'nagl fhtagn!


From xah at xahlee.org  Fri Feb 11 01:38:20 2005
From: xah at xahlee.org (Xah Lee)
Date: 10 Feb 2005 22:38:20 -0800
Subject: [perl-python] combinatorics fun
In-Reply-To: <1108075884.250995.62520@g14g2000cwa.googlegroups.com>
References: <1108075884.250995.62520@g14g2000cwa.googlegroups.com>
Message-ID: <1108103900.874115.41120@z14g2000cwz.googlegroups.com>

David Eppstein's code is very nice.

Here's the python version of the perl code:

?# -*- coding: utf-8 -*-
?# Python
?
?def combo (n):
?    '''returns all possible (unordered) pairs out of n numbers 1 to
n.
?
?    Returns a dictionary. The keys are of the form "n,m",
?    and their values are tuples. e.g. combo(4) returns
?    {'3,4': (3, 4), '1,4': (1, 4), '1,2': (1, 2),
?    '1,3': (1, 3), '2,4': (2, 4), '2,3': (2, 3)}'''
?    result={}
?    for j in range(1,n):
?        for i in range(1,n+1):
?            m = ((i+j)-1) % n + 1
?            if (i < m):
?                result["%d,%d"%(i,m)]=(i,m)
?    return result
?
?print combo(4)

So sweet.

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org  Thu Feb  3 18:47:10 2005
From: Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org (Alexander)
Date: Fri, 04 Feb 2005 02:47:10 +0300
Subject: dict indexed by lists - ?
Message-ID: <MSGID_2=3A5025=2F3.131_4202e613@fidonet.org>

Hello All!

I'am trying to make something like this:

CPT={ ['b0','c0']:1, ['b0','c1']:0, ['b1','c0']:3, ['b1','c1']:1 }

but python says "TypeError: list objects are unhashable"

I can replace list with touple: CPT={ ('b0','c0'):1, ('b0','c1'):0, ...and so
on. But, where is one problem: indexes (or, more precisely, keys) are generated
dynamically, like code below! I can't do it with touples.


    key=[]
    for up in uplinks:
      key.append(up.state(0))


and, later, modifying it like this:
  key[2]=up.next_state()
  ...
  print CPT[key]

Any suggestions?


Alexander, zatv at bk.ru


From deetsNOSPAM at web.de  Wed Feb  9 05:45:27 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 09 Feb 2005 11:45:27 +0100
Subject: strange behaviour with decorators.
References: <slrnd0jpc6.26q.apardon@rcpc42.vub.ac.be>
Message-ID: <36u7udF57ljlhU1@individual.net>

> Now although this behaviour was surprising after somethought
> I think I may understand why things go wrong, but I certainly
> don't understand the result I got. I would think an error like:
> 
> TypeError: call() takes exactly 2 arguments (1 given)
> 
> would have been more appropiate.
> 
> 
> Am I missing something?
> Is it a bug?
> Maybe both?

Maybe I'm missing something - but I exactly get that error if I don't use
that try: except: of yours:

For this 

-----------------
def positive(f):
  def call(self, u):

    if u < 1:
      print 'Not Positive'
      raise ValueError
    return f(self, u)

  return call

class Incrementor:
    def __init__(self, val=0):
        self.value = val

    @positive
    def __call__(self, term = 1):
        print 'incrementing'
        self.value += term
        return self.value

inc = Incrementor(0)

print inc(1)
print inc()
print inc(3)

--------------------

I get this result:
deets at kumquat:~$ python2.4 /tmp/test.py
incrementing
1
Traceback (most recent call last):
  File "/tmp/test.py", line 24, in ?
    print inc()
TypeError: call() takes exactly 2 arguments (1 give

-- 
Regards,

Diez B. Roggisch


From tonino.greco at gmail.com  Tue Feb 15 00:54:07 2005
From: tonino.greco at gmail.com (Tonino)
Date: 14 Feb 2005 21:54:07 -0800
Subject: gui scripting
In-Reply-To: <gm27e2-m6i.ln1@lairds.us>
References: <1108381881.828494.98340@c13g2000cwb.googlegroups.com>
	<gm27e2-m6i.ln1@lairds.us>
Message-ID: <1108446847.194414.50960@c13g2000cwb.googlegroups.com>

thanks - this helps ;))

will play with android ...



From ncoghlan at iinet.net.au  Fri Feb  4 23:28:15 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 05 Feb 2005 14:28:15 +1000
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <87hdksvzcr.fsf@pobox.com>
References: <dvOMd.33656$EG1.19314@lakeread04>	<mailman.1905.1107543558.22381.python-list@python.org>	<LYydnagbw4-vVZ7fRVn-pw@comcast.com>
	<87hdksvzcr.fsf@pobox.com>
Message-ID: <42044B5F.3070401@iinet.net.au>

John J. Lee wrote:
> Steven Bethard <steven.bethard at gmail.com> writes:
> 
> 
>>Mike C. Fletcher wrote:
> 
> [...]
> 
>>> >>> def changes( dataset ):
>>>...     last = None
>>>...     for value in dataset:
>>>...         if value != last:
>>>...             yield value
>>>...         last = value
>>>...        >>> print list(changes(data ))
>>>which is quite readable/elegant IMO.
>>
>>But fails if the list starts with None:
>>
>>py> lst = [None,0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5]
>>py> def changes(dataset):
>>...     last = None
>>...     for value in dataset:
>>...         if value != last:
>>...             yield value
>>...         last = value
>>...
>>py> list(changes(lst))
>>[0, 1, 2, 3, 2, 4, 5]
>>
>>A minor modification that does appear to work:
>>
>>py> def changes(dataset):
>>...     last = object()
>>...     for value in dataset:
>>...         if value != last:
>>...             yield value
>>...         last = value
>>...
>>py> list(changes(lst))
>>[None, 0, 1, 2, 3, 2, 4, 5]
> 
> 
> Unless the first object in the list has a weird __cmp__ (does
> happen...).  OK, weird __cmp__s are nasty anyway, but still, why
> compound it through cleverness when you can write a really plodding
> function that *always* does what it says on the tin?

In that case:

Py> def collapsed(iterable):
...   itr = iter(iterable)
...   last = itr.next()
...   yield last
...   for value in itr:
...     if value != last:
...       yield value
...       last = value
...
Py> from Tkinter import _flatten #**
Py> lst = list(_flatten([[i] * 5 for i in range(10)]))
Py> lst
[0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5
, 5, 5, 5, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9]
Py> list(collapsed(lst))
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

** Hmm, this function really is quite handy when generating test data. Maybe in 
Python 2.5 the line should be spelt "from itertools import flatten"

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From xifxif at gmail.com  Mon Feb 28 09:57:09 2005
From: xifxif at gmail.com (Xif)
Date: 28 Feb 2005 06:57:09 -0800
Subject: How do you control _all_ items added to a list?
References: <1109599026.828317.297700@z14g2000cwz.googlegroups.com>
	<1109599666.643466.239700@l41g2000cwc.googlegroups.com>
Message-ID: <1109602629.352857.71910@g14g2000cwa.googlegroups.com>

Quoting Fuzzyman:

"If you subclass list then you will need to override all methods that
can set items."


Overiding all those methods is too much of an effort. I don't really
need them.

I'll just have an object that uses a list internally, and define only
the two methods I really need: extend() and getItems().

That way I retain full control over what goes into the private
obj._list, without the superfluous work of overriding all those methods
I don't really need.

Thanks for your help,
Xif



From markus_wankusGETRIDOFALLCAPS at hotmail.com  Fri Feb  4 08:19:02 2005
From: markus_wankusGETRIDOFALLCAPS at hotmail.com (Markus Wankus)
Date: Fri, 04 Feb 2005 08:19:02 -0500
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
In-Reply-To: <mailman.1871.1107502855.22381.python-list@python.org>
References: <ctsjmg$75p$1@usenet.otenet.gr><pan.2005.02.03.19.10.39.349763@jerf.org>	<ueCMd.22177$Ck1.1629547@news20.bellglobal.com>
	<mailman.1871.1107502855.22381.python-list@python.org>
Message-ID: <lDKMd.4315$lw4.889432@news20.bellglobal.com>

Fredrik Lundh wrote:

> Markus Wankus wrote:
> 
> 
>>Google his name - he has been banned from Netbeans and Eclipse (and Hibernate, and others...) for 
>>good reason.  Can you imagine how much of a Troll you need to be to *actually* get "banned" from 
>>the newsgroups of open source projects such as those?
> 
> 
> have Pythoneers ever "banned" anyone from a public forum?  it's not like
> we haven't seen trolls and crackpots before, you know.
> 
> </F> 
> 

I know - which is why it is even more amazing he can get banned from 
other open source groups similarly tolerant as this one...

M.


From wyojustin at hotmail.com  Sun Feb 27 21:28:38 2005
From: wyojustin at hotmail.com (Justin Shaw)
Date: Sun, 27 Feb 2005 21:28:38 -0500
Subject: Using PIL with py2exe
References: <urgetv0v7n1eqoiffhi8533ql9ssmvcq8v@4ax.com>
Message-ID: <J42dnRNiG7N8HL_fRVn-3g@comcast.com>

"John Carter" <> wrote in message
news:urgetv0v7n1eqoiffhi8533ql9ssmvcq8v at 4ax.com...
> Does anyone know how to embed PIL into a py2exe program.
>
> As far as I can tell PIL is not finding its plugins for Image I/O,
> they are imported dynamically as required. So I cant load or save
> pictures
>
> I tried making a copy of the plugin files to the application
> directory, but I've had no luck in making the code see the files
> I'd be grateful for any suggestion.
>
> Please e-mail me, as well as posting a reply.
>
> John Carter
> jnc at ecs.soton.ac.uk

Just import all of the plugins.  I have this in a file called "plugins.py":


import JpegImagePlugin
import TgaImagePlugin
import PngImagePlugin
import GifImagePlugin
import PcxImagePlugin
import PpmImagePlugin
import BmpImagePlugin
import FliImagePlugin
import EpsImagePlugin
import DcxImagePlugin
import FpxImagePlugin
import ArgImagePlugin
import CurImagePlugin
import GbrImagePlugin
import IcoImagePlugin
import ImImagePlugin
import ImtImagePlugin
import IptcImagePlugin
import McIdasImagePlugin
import MicImagePlugin
import MspImagePlugin
import PcdImagePlugin
import PdfImagePlugin
import PixarImagePlugin
import PsdImagePlugin
import SgiImagePlugin
import SunImagePlugin
import TgaImagePlugin
import TiffImagePlugin
import WmfImagePlugin
import XVThumbImagePlugin
import XbmImagePlugin
import XpmImagePlugin

"John Carter" <> wrote in message
news:urgetv0v7n1eqoiffhi8533ql9ssmvcq8v at 4ax.com...
> Does anyone know how to embed PIL into a py2exe program.
>
> As far as I can tell PIL is not finding its plugins for Image I/O,
> they are imported dynamically as required. So I cant load or save
> pictures
>
> I tried making a copy of the plugin files to the application
> directory, but I've had no luck in making the code see the files
> I'd be grateful for any suggestion.
>
> Please e-mail me, as well as posting a reply.
>
> John Carter
> jnc at ecs.soton.ac.uk




From beliavsky at aol.com  Fri Feb 11 20:01:56 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 11 Feb 2005 17:01:56 -0800
Subject: exception handling for a function returning several values
Message-ID: <3064b51d.0502111701.1731fef3@posting.google.com>

If a function that normally returns N values raises an exception, what
should it return? N values of None seems reasonable to me, so I would
write code such as

def foo(x):
    try:
       # code setting y and z
       return y,z
    except:
       return None,None

y,z = foo(x)

If I try to use y or z inappropriately when they are None, the program
will stop. An alternative is to return an error flag in addition to y
and z from function foo and check the value of the error flag in the
calling program. This seems a bit awkward.


From irmen.NOSPAM at xs4all.nl  Thu Feb 10 18:26:44 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Fri, 11 Feb 2005 00:26:44 +0100
Subject: is there a safe marshaler?
In-Reply-To: <DtROd.47310$Z14.32852@news.indigo.ie>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<9RMOd.47295$Z14.32810@news.indigo.ie>
	<420bd184$0$28994$e4fe514c@news.xs4all.nl>
	<DtROd.47310$Z14.32852@news.indigo.ie>
Message-ID: <420bedb4$0$28975$e4fe514c@news.xs4all.nl>

Hi Alan

Alan Kennedy wrote:
> Well, the python JSON codec provided appears to use eval, which might 
> make it *seem* unsecure.
> 
> http://www.json-rpc.org/pyjsonrpc/index.xhtml
> 
> But a more detailed examination of the code indicates, to this reader at 
> least, that it can be made completely secure very easily. The designer 
> of the code could very easily have not used eval, and possibly didn't do 
> so simply because he wasn't thinking in security terms.
[...]

Very interesting indeed.

> So I don't think there any serious security issues here: the 
> "simplicity" of the JSON grammar is what attracted me to it in the first 
> place, especially since there are already robust and efficient lexers 
> and parsers already available built-in to python and javascript (and 
> javascript interpreters are getting pretty ubiquitous these days).

The cross-platform/language aspect is quite nice indeed.

> And it's certainly the case that if the only available python impl of 
> JSON/RPC is not secure, it is possible to write one that is both 
> efficient and secure.

I think we (?) should do this then, and send it to the author
of the original version so that he can make an improved version
available? I think there are more people interested in a secure
marshaling implementation than just me :)


I'll still have to look at Twisted's Jelly.


Thanks for your analysis,
--Irmen


From removethis.kartic.krishnamurthy at gmail.com  Thu Feb  3 21:46:16 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Fri, 04 Feb 2005 02:46:16 GMT
Subject: OT: why are LAMP sites slow?
In-Reply-To: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
Message-ID: <YlBMd.27277$MX2.19117@twister.nyroc.rr.com>

Paul Rubin said the following on 2/3/2005 7:20 PM:
> LAMP = Linux/Apache/MySQL/P{ython,erl,HP}.  Refers to the general
> class of database-backed web sites built using those components.  This
> being c.l.py, if you want, you can limit your interest to the case the
> P stands for Python.
> 
> I notice that lots of the medium-largish sites (from hobbyist BBS's to
> sites like Slashdot, Wikipedia, etc.)  built using this approach are
> painfully slow even using seriously powerful server hardware.  Yet
> compared to a really large site like Ebay or Hotmail (to say nothing
> of Google), the traffic levels on those sites is just chickenfeed.
> 

If you are talking about Wikipedia as a prime example, I agree with you 
that it is *painfully* slow.

And the reason for that I probably because of the way the language is 
used (PHP) (this is a shot in the dark as I have not looked into 
Mediawiki code), and compounded by probably an unoptimized database. I 
don't want to start flame wars here about PHP; I use PHP to build client 
sites and like it for the "easy building of dynamic sites" but the 
downside is that there is no "memory"...every page is compiled each time 
a request is made. I doubt if Wikipedia site uses an optimizer (like 
Zend) or caching mechanisms. Optimizers and/or PHP caches make a huge 
performance difference.

Also, PHP has put dynamic sites within easy reach of several programmers 
who slap together sites in no time. These sites may have spaghetti code 
and even the best infrastructure is not enough to support shabby design 
(code, db setup and even server tuning). I have seen people become 
programmers overnight! There are also LAMP sites that use Apache 1.3 
that is a resource hog; I guess production sites do not want to upgrade 
to Apache 2.x/PHP combo!

Coming to python, to be honest, I have not seen many LAMPy sites. I use 
blogspot.com frequently and it is pretty reliable; I hear that it is 
written in Python but I have no idea about the server and database software.

The way to go is to build around application servers, IMHO. I like the 
Twisted.web/Nevow methodology, though for simple situations it may be an 
overkill. I like the Webware with Apache-thru-Webware-Adapter setup - 
that is what I am considering implementing for my organization. (Even in 
the App Server arena, I have seen Websphere with JSP/Servelets sites to 
be soooo slow that I could finish my breakfast and still wait for the page)

 From my experience it is an overall tuning thing. Usual culprits are 
untuned Linux boxes, unoptimized database design, poorly designed 
queries and/or poor application logic...and ah! table-driven pages. 
Pages built on tables for the layout kill the browser. CSS is the way to go.

Thanks,
-Kartic


From ashot at removemolsoftthis.com  Fri Feb  4 19:32:28 2005
From: ashot at removemolsoftthis.com (Ashot)
Date: Fri, 04 Feb 2005 18:32:28 -0600
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot><1107487113.732375.110850@c13g2000cwb.googlegroups.com><opslnmywarej1m1c@ashot><mailman.1865.1107491434.22381.python-list@python.org><opsln54fpwej1m1c@ashot>
	<36hculF51ho2sU1@individual.net><1107530489.308497.103530@g14g2000cwa.googlegroups.com><36hrjpF4ui8fbU1@individual.net>
	<mailman.1911.1107546744.22381.python-list@python.org>
	<36i84qF52ce29U1@individual.net> <opslo127s7ej1m1c@ashot>
	<cu0umf$cja$1@sea.gmane.org>
	<mailman.1936.1107561113.22381.python-list@python.org>
Message-ID: <opslo7setjej1m1c@ashot>

One more thing I was wondering about: why not highlight the source code in  
the errors since you already have this functionality (with '??' command).   
It would be nice to have it highlighed on the prompt as well, but I  
imagine this may be more difficult.. I've been using IPython for about a  
week and thats one of the two things I miss..

.a
On Fri, 04 Feb 2005 16:51:26 -0700, Fernando Perez <fperez.net at gmail.com>  
wrote:

> Fernando Perez wrote:
>
>> Ashot wrote:
>>
>>> this is what it looks like:
>>>
>>> http://www.freshraisins.com/sand/ipythonscreen.PNG
>>>
>>> does cygwin have a readline utility in it?  Perhaps this is overriding  
>>> the
>>> correct one?  Thats the only thing I can think of.
>>
>> Hi folks,
>>
>> could you please test under windows the 1.9 version of readline?
>
> OK, make that 1.10:
>
> http://sourceforge.net/project/shownotes.php?release_id=302526
>
> Gary specifically targeted the light background problems with this one,  
> so
> please report here if the whole thing gets fixed.
>
> Regards,
>
> f
>



-- 
==============================
Ashot Petrosian
University of Texas at Austin, Computer Sciences
(views expressed are solely my own)
==============================


From programmer.py at gmail.com  Thu Feb 10 08:51:01 2005
From: programmer.py at gmail.com (Jaime Wyant)
Date: Thu, 10 Feb 2005 07:51:01 -0600
Subject: Reportlab and Barcodes
In-Reply-To: <1107976931.161073.258600@f14g2000cwb.googlegroups.com>
References: <1107894763.331701.26470@c13g2000cwb.googlegroups.com>
	<mailman.2252.1107964089.22381.python-list@python.org>
	<1107965379.046718.248000@c13g2000cwb.googlegroups.com>
	<1107976931.161073.258600@f14g2000cwb.googlegroups.com>
Message-ID: <d52c72d20502100551f842151@mail.gmail.com>

That looks cleaner than mine.  I had to do this ->

# Register the barcode true-type-font
# Don't want to push the font out to everyone in the office...
from reportlab.pdfbase import pdfmetrics
from reportlab.pdfbase.ttfonts import TTFont
pdfmetrics.registerFont( TTFont( 'barcode',
r'c:\inetpub\wwwroot\barcode\fre3of9x.ttf'))

# 'c' is the canvas
c.setFont( "barcode", 40  )
c.drawString( x * inch, y * inch, text )

jw

On Wed, 09 Feb 2005 11:25:22 -0800 (PST), Josh <JoshuaACohen at gmail.com> wrote:
> One of the users on the Reportlabs mailing list was kinda enough to
> offer me the solution.. A simple call to the drawOn function, e.g.:
> 
> bc = code39.Standard39("123",xdim = .015*inch)
> x = 6*inch
> y = -5*inch
> bc.drawOn(canvas,x,y)
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From m.bless at gmx.de  Tue Feb 22 17:29:37 2005
From: m.bless at gmx.de (Martin Bless)
Date: Tue, 22 Feb 2005 23:29:37 +0100
Subject: How to write a ping client
References: <1109039706.092671.137360@f14g2000cwb.googlegroups.com>
Message-ID: <9dcn1119u6q2r2a15q96npmuckka87l55a@4ax.com>

On 21 Feb 2005 18:35:06 -0800, "Harlin" <harlinseritt at yahoo.com>
wrote:

>Is there a way to write a ping client? I would like to be able to write
>a small ping client so that I dont have to do os.system('ping args')

I once followed the same line and used a py module by Jeremy Hylton if
I remember correctly. 

But only to find that on the Linux machine I wasn't allowed as non
root to ping from my script. So I went back to the os.system() call.

mb - Martin



From dominic.fox at gmail.com  Mon Feb 14 05:10:50 2005
From: dominic.fox at gmail.com (Dominic Fox)
Date: Mon, 14 Feb 2005 10:10:50 +0000
Subject: Concurrent Python
In-Reply-To: <Pine.LNX.4.44.0502121302130.1685-100000@pingu.thwackety.com>
References: <f278b213050211091151904389@mail.gmail.com>
	<Pine.LNX.4.44.0502121302130.1685-100000@pingu.thwackety.com>
Message-ID: <f278b2130502140210131f4ea3@mail.gmail.com>

> For an alternative approach (based on using generators forming a dataflow
> component system) you might find our project interesting - the core
> concurrency stuff is packaged up separately with API docs (and trivial
> example) here: http://kamaelia.sourceforge.net/Docs/Axon.html

Would it be correct to characterise this approach as co-operative
multithreading?

I have a feeling that in Python, at least, where threads and locks are
not so cheap, this approach will scale rather better - at the cost of
making some of the thread management explicit (I used to write WIMP
programs on the Acorn Archimedes that had the same basic structure:
message loop picks up messages, does some processing then explicitly
relinquishes control so that other applications can take their turn).
The syntax is also agreeably Pythonic.

I haven't investigated Stackless in much detail, but I believe it
makes a lot of these trade-offs moot - no need to simulate coroutines
when you have the real thing...

Anyway, thanks for this - I have linked it from the CTM in other
languages page of the CTM Wiki:

http://codepoetics.com/wiki/index.php?title=Topics:CTM_in_other_languages#Concurrency_in_Python

Dominic


From nick at craig-wood.com  Thu Feb 17 01:50:23 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 17 Feb 2005 06:50:23 GMT
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<37h194F50j4pkU1@individual.net>
	<7xfyzwehq7.fsf@ruckus.brouhaha.com>
	<37h2keF5a2ijjU1@individual.net>
	<7xwtt8a7vu.fsf@ruckus.brouhaha.com>
Message-ID: <slrnd17j2n.3k7.nick@irishsea.home.craig-wood.com>

Paul Rubin <http> wrote:
>  The issue with using an rdbms is not with the small amount of code
>  needed to connect to it and query it, but in the overhead of
>  installing the huge piece of software (the rdbms) itself, and keeping
>  the rdbms server running all the time so the infrequently used app can
>  connect to it.

I've found SQLobject to be a really good way of poking objects in an
SQL database with zero hassle.

It can also use SQLite (which I haven't tried) which gets rid of your
large rdbms process but also gives you a migration path should the
problem expand.

>  ZODB is also a big piece of software to install.  Is it at least
>  100% Python with no C modules required?  Does it need a separate
>  server process?  If it needs either C modules or a separate server,
>  it really can't be called a low-end strategy.

ZODB looks fun.  I just wish (being lazy) that there was a seperate
debian package for just it and not the whole of Zope.

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


From steve at holdenweb.com  Mon Feb  7 08:12:25 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 07 Feb 2005 08:12:25 -0500
Subject: def __init__ question in a class definition
In-Reply-To: <1107754489.980148.277690@c13g2000cwb.googlegroups.com>
References: <mailman.2048.1107750192.22381.python-list@python.org>
	<1107754489.980148.277690@c13g2000cwb.googlegroups.com>
Message-ID: <42076939.6020405@holdenweb.com>

M.E.Farmer wrote:

>>Jeffrey Borkent
>>Systems Specialist
>>Information Technology Services
> 
> 
> With that kind of credentials, and the fact that you claim you are a
> system specialists....
> I don't know you have me worried already.
> I guess for you I just say RTFM.
> If you think that is harsh then don't ask a 2nd grade question yet
> claim/pretend to be some sorta system specialists.

Hey, ease up, this is comp.lang.python, remember.

> You tried searching the archives first I am sure.
> Go here  http://www.python.org and *read*, come back when you are
> really stuck.
> M.E.Farmer
> P.S. YES the __ matter, they identify special methods ! __init__ is the
> class CONSTRUCTOR.
> 
Next time, could we try exchanging the body of the message and the PS? 
That way you could have omitted the PS when you got half way through it 
and realised you were just wasting your time and everyone else's ...

got-out-the-wrong-side-of-bed-ly y'rs  - steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From mahs at telcopartners.com  Tue Feb  8 13:50:24 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Tue, 08 Feb 2005 10:50:24 -0800
Subject: turing machine in an LC
In-Reply-To: <pan.2005.02.08.12.47.00.135408@jerf.org>
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>	<87mzuf9gu8.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>	<s9zvf93ovp8.fsf@salmakis.intevation.de>
	<pan.2005.02.08.12.47.00.135408@jerf.org>
Message-ID: <cub1f2$i4b$1@sea.gmane.org>

Jeremy Bowers wrote:
> On Tue, 08 Feb 2005 17:36:19 +0100, Bernhard Herzog wrote:

> 
> Now you *can* get at the previous state and write a state-transition
> expression in perfectly legal Python.
> 
> What do you know, generator comprehensions are Turing Complete and list
> comprehensions aren't. I wouldn't have expected that.
> 
I see no difference between LCs and GEs in this respect:

  >>> import itertools as it
  >>>
  >>> def fact_ge(n):
  ...     f = [1]
  ...     f.extend(i*j for i,j in it.izip(xrange(1,1+n), f))
  ...     return f
  ...
  >>> def fact_lc(n):
  ...     f = [1]
  ...     [f.append(i*j) for i,j in it.izip(xrange(1,1+n), f)]
  ...     return f
  ...
  ...
  >>> fact_ge(10)
[1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800]
  >>> fact_lc(10)
[1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800]

Michael





From randall at tnr.cc  Wed Feb  9 02:06:42 2005
From: randall at tnr.cc (Randall Smith)
Date: Wed, 09 Feb 2005 01:06:42 -0600
Subject: Name of type of object
In-Reply-To: <4209A52C.A1C40311@yahoo.com>
References: <4209A52C.A1C40311@yahoo.com>
Message-ID: <bEiOd.83727$Tf5.12604@lakeread03>

Jive Dadson wrote:
> The traceback routine prints out stuff like,
> 
> 	NameError: global name 'foo' is not defined
> 
> NameError is a standard exception type.
> 
> What if I want to print out something like that?
> I've determined that "global name 'foo' is not defined" comes 
> from the __str__ member of the exception object.
> Where does it find the string "NameError"?  In general, if I have 
> an object, is there a way to obtain the name of the type of the object?
> 
> Thankee.

type(object) ?

Randall


From brent.hughes at comcast.net  Fri Feb  4 15:10:10 2005
From: brent.hughes at comcast.net (Brent W. Hughes)
Date: Fri, 4 Feb 2005 13:10:10 -0700
Subject: Possibly OT:  Controlling winamp with Python
Message-ID: <JZOdnVLIY48-S57fRVn-hA@comcast.com>

I'm running Windows XP and I'm using winamp to listen to internet radio 
stations.  Occasionally, an annoying commercial will come on.  I would like 
to write a Python program that, when run, will, in essence, push on winamp's 
mute button.  Then, after say 20 seconds, it will push the mute button again 
to restore the sound.  Is such a thing possible?

Brent




From steven.bethard at gmail.com  Mon Feb 21 16:25:16 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 21 Feb 2005 14:25:16 -0700
Subject: iterative lambda construction
In-Reply-To: <1109018810.652908.93840@f14g2000cwb.googlegroups.com>
References: <1109018810.652908.93840@f14g2000cwb.googlegroups.com>
Message-ID: <zvOdneUkB6QqzIffRVn-jw@comcast.com>

markscottwright wrote:
> Just for the hell of it, I've been going through the old Scheme-based
> textbook "Structure and Interpretation of Computer Programs" and seeing
> what I can and can't do with python.  I'm trying to create a function
> that returns the function (not the results of the function, but a
> function object) that results from applying function f to it's (single)
> argument N times.  For example, if you have "def sq(x): return x*x",
> then repeated(sq, 2)(2) = 16, repeated(sq, 3)(2) = 256, etc.
> 
> I can do it recursively, like this:
> 
> def repeated(f, count):
>    if count == 1:
>        return f
>    else:
>        return lambda x: f(repeated(f, count - 1)(x)
> 
> But when I try to do it iteratively, it just hangs when I try to
> evaluate the results (for count > 1):
> 
> def repeated2(f, count):
>     newfun = f
>     for i in range(count-1):
>         newfun = lambda x: newfun(f(x))
>     return newfun
> 
> For the life of me, I can't figure out why.

Your problem is that lambdas (and defs) do late-binding.  Consider the 
following code:

py> newfun = (1).__add__
py> id(newfun)
18354384
py> newfun = lambda: sys.stdout.write('%s' % id(newfun))
py> id(newfun)
18217328
py> newfun()
18217328

Note that the id of 'newfun' is the same in the body of the lambda as 
the id of 'newfun' after the lambda is defined.  That is, if 'newfun' in 
the lambda were to be called, it would call the lambda function 
recursively, instead of calling the previous 'newfun'.  This is why 
you're getting infinite recursion.

The reason this happens is that, when a name is not bound by the 
argument list of a function, Python will look for that name in the 
enclosing scopes.  Since the lambda does not bind the name 'newfun', 
Python looks out to the enclosing scope to find 'newfun' (which, in this 
case, happens to be the funciton itself).

One solution to this problem is to bind the old function to a name in 
the argument list of your lambda[1]:

py> def repeated2(f, count):
...     newfun = f
...     for i in range(count - 1):
...         def newfun(x, oldfun=newfun):
...             return oldfun(f(x))
...     return newfun
...
py> def square(x):
...     return x**2
...
py> repeated2(square, 2)(2)
16
py> repeated2(square, 3)(2)
256

Another possibility would be to store the old function as part of a 
class instance:

py> class Composer(object):
...     def __init__(self, outerfunc, innerfunc):
...         self.outerfunc = outerfunc
...         self.innerfunc = innerfunc
...     def __call__(self, x):
...         return self.outerfunc(self.innerfunc(x))
...
py> def repeated2(f, count):
...     newfun = f
...     for _ in range(count - 1):
...         newfun = Composer(newfun, f)
...     return newfun
...
py> repeated2(square, 2)(2)
16
py> repeated2(square, 3)(2)
256

Note that either way, you need some means to store the old value of 
newfunc.  In the first case, it's stored by binding it as a default 
value of one of the the function's arguments.  In the second case, it's 
stored as an instance attribute of a class.

STeVe

[1] I use def instead of lambda.  See "Inappropriate use of Lambda" in 
http://www.python.org/moin/DubiousPython


From dbickett at gmail.com  Fri Feb  4 06:22:18 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Fri, 4 Feb 2005 06:22:18 -0500
Subject: Possible additions to the standard library? (WAS: About
	standard library improvement)
In-Reply-To: <ctv8h1$c25$1@sea.gmane.org>
References: <WorldClient-F200502031432.AA32333857@tesla.cujae.edu.cu>
	<1d6cdae3050203195251843db2@mail.gmail.com>
	<ctv8h1$c25$1@sea.gmane.org>
Message-ID: <1d6cdae305020403225eafdf80@mail.gmail.com>

Fredrik Lundh wrote:
> your DeleteKeyAll operation would fit nicely in such an interface, but I'm not
> sure it belongs in the low-level interface, and a higher-level interface consisting
> of just one helper would seem a bit odd.    on the other hand, it's about time
> someone wrote that "winreg" module... (hint).

I wasn't aware that was even on our plate ;) Is the intent for it just
to have wrappers around the _winreg functions, or were there things
planned for it?

-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From dbickett at gmail.com  Sun Feb  6 14:08:02 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Sun, 6 Feb 2005 14:08:02 -0500
Subject: pygame.mixer.music not playing
In-Reply-To: <36mvjkF54gvnrU1@individual.net>
References: <36mb0iF54udklU1@individual.net>
	<1107700800.258876.298010@z14g2000cwz.googlegroups.com>
	<36mvjkF54gvnrU1@individual.net>
Message-ID: <1d6cdae305020611087c52c0ec@mail.gmail.com>

Marian Aldenh?vel wrote:
> Maybe some way to remote control another player would be in order. Leave it
> to software that is specialized and all. But I would want something that runs
> on Windows and Linux which narrows down my options.

Perhaps Zinf?

http://www.zinf.org/

-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From xah at xahlee.org  Tue Feb  1 15:45:07 2005
From: xah at xahlee.org (Xah Lee)
Date: 1 Feb 2005 12:45:07 -0800
Subject: [perl-python] string pattern matching
Message-ID: <1107290707.549792.199860@c13g2000cwb.googlegroups.com>

# -*- coding: utf-8 -*-
# Python

# Matching string patterns
#
# Sometimes you want to know if a string is of
# particular pattern.  Let's say in your website
# you have converted all images files from gif
# format to png format. Now you need to change the
# html code to use the .png files. So, essentially
# you want to replace strings of the form
#
# img src="*.gif"
# to
# img src="*.png"
#
# Python provides string pattern matching by the
# "re" module.  (String Pattern Matching is
# inanely known as Regular Expression (regex) in
# the computing industry. It is a misnomer and
# causes great unnecessary confusion.)


?import re
?
?text='''<img src="../Icons_dir/icon_sum.gif" width="32"
height="32">'''
?
?pattern = r'''src="([^"]+)\.gif"'''
?
?result = re.search(pattern, text)
?
?if result:
?     print 'yes'
?     print result.expand(r"\1") # the captured pattern
?else:
?     print 'no'

#-------------
# if re.search(pattern, text) does not match, then the result is
None. If it matches, an object is returned. One can then use methods
such as .groups(), .expand(), .split() ... to find the matched parts,
or a given replacement string, or split the text into multiple part
by the regex...

# regex is quite confusing for beginners, but
# isn't really difficult to understand. It comes
# with practice.

# see
# http://python.org/doc/lib/module-re.html
# for detail.

# i'll have to study more to make complet example. Try it yourself.

-----------------

# in perl, regex is its mainstay.
# very expressive with syntax, but not so in semantic,
# when compared to Python.

# for syntax variability, for example the following are all the same.

$text = "what ever is here to be matched";

if ( $text =~ ever) { print 'yes'} else {print "no"}
if ( $text =~ /ever/) { print 'yes'} else {print "no";}
if ( $text =~ m/ever/) { print 'yes'} else {print "no"}
if ( $text =~ m(ever)) { print 'yes'} else {print "no"}
if ( $text =~ m at ever@) { print 'yes'} else {print "no"}

# for detail of its much ado about nothing nature,
# see perldoc perlre

--------
this is perl-python a-day mailing list. To subscribe, see
http://xahlee.org/perl-python/python.html
Xah
  xah at xahlee.org
  http://xahlee.org/PageTwo_dir/more.html



From mefjr75 at hotmail.com  Sat Feb 26 17:56:01 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 26 Feb 2005 14:56:01 -0800
Subject: Thread scheduling
In-Reply-To: <mailman.3100.1109457191.22381.python-list@python.org>
References: <1109456481.214243.140670@l41g2000cwc.googlegroups.com>
	<mailman.3100.1109457191.22381.python-list@python.org>
Message-ID: <1109458561.846060.285210@l41g2000cwc.googlegroups.com>

This may help.
http://linuxgazette.net/107/pai.html
Also be sure to google.
search strategy:
    Python threading
    Python threads
    Python thread tutorial
    threading.py example
    Python threading example
    Python thread safety
hth,
M.E.Farmer



From mail at tuxipuxi.org  Mon Feb  7 12:30:18 2005
From: mail at tuxipuxi.org (Michael Goettsche)
Date: Mon, 7 Feb 2005 18:30:18 +0100
Subject: Big development in the GUI realm
In-Reply-To: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
Message-ID: <200502071830.18644.mail@tuxipuxi.org>

On Monday 07 February 2005 17:52, RM wrote:
> For all you GUI developers, things just got a little more interesting.
> Trolltech will soon be offering the QT GUI toolkit for Windows under
> the GPL license.  That means that PyQt may become a much more popular
> option in the near future.  Unfortunately, some things available for
> the commercial customers of Trolltech are not available to the GPL
> users.  For example, from their FAQ, it seems that no precompiled
> binaries will be provided.  Support for comercial compilers will not be
> built in, only for gcc (through Cygwin?).  Also, their database drivers
> will not be available.  Oh, well, I guess you can't have it all.  Good
> news though!
>
> See more here:
>
> www.trolltech.com
>
> I wonder how this is going to affect the GUI landscape.

Not 100% right. Only drivers for commercial databases will not be included, 
mysql and co. are available.




From ncoghlan at iinet.net.au  Fri Feb 11 08:33:52 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 11 Feb 2005 23:33:52 +1000
Subject: Loading functions from a file during run-time
In-Reply-To: <1108091598.055004.24890@g14g2000cwa.googlegroups.com>
References: <1108091598.055004.24890@g14g2000cwa.googlegroups.com>
Message-ID: <420CB440.2080702@iinet.net.au>

Bryant Huang wrote:
> Hello!
> 
> I would like to read in files, during run-time, which contain plain
> Python function definitions, and then call those functions by their
> string name. In other words, I'd like to read in arbitrary files with
> function definitions, using a typical 'open()' call, but then have
> those functions available for use.
> 
> The 'import' keyword is not appropriate, AFAIK, because I want to be
> able to open any file, not one that I know ahead of time (and thus can
> import at design-time).

This usage is one of the reasons why the __import__ function exists (despite 
what its docs say). It's right there at the top of the library reference's 
'builtin functions' section:

http://www.python.org/dev/doc/devel/lib/built-in-funcs.html

Instead of writing "import foo as mod" you can write "mod = __import__('foo')". 
The first is better when you do know the name of the module you want at coding 
time, but the latter is handy when you want to be dynamic about it.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From manish.gupta at utstar.com  Thu Feb 17 15:16:03 2005
From: manish.gupta at utstar.com (Manish Gupta (BBS))
Date: Thu, 17 Feb 2005 15:16:03 -0500
Subject: TypeError: send() argument 1 must be string or read-only buffer,
 not int
Message-ID: <4214FB83.90209@utstar.com>


Hello

  invoking something like following -

       sock.send(100)

  generates the following error -

       TypeError: send() argument 1 must be string or read-only buffer, 
not int


  how can I work around this? I wish to write
  msg-length on a stream socket.

  thanks in advance.
  manish




From petr at tpc.cz  Thu Feb  3 19:52:55 2005
From: petr at tpc.cz (McBooCzech)
Date: 3 Feb 2005 16:52:55 -0800
Subject: how to generate SQL SELECT pivot table string
References: <1107475373.064794.155030@l41g2000cwc.googlegroups.com>
	<1107477657.906912.54080@z14g2000cwz.googlegroups.com>
Message-ID: <1107478375.650591.281210@g14g2000cwa.googlegroups.com>

Thanks for your comment but I am NOT looking for the answer to the
question: "Which SQL command will return requested pivot table"(anyway
it will be an OFF TOPIC question here). My SQL SELECT statement works
fine with Firebird 1.5! What I am looking how to generate this SELECT
using Python. Anyway thanks for tyring to help :)



From fredrik at pythonware.com  Thu Feb  3 02:36:59 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 3 Feb 2005 08:36:59 +0100
Subject: Reference count question
References: <003401c5090b$2f0f4fb0$90010d0a@umanis.com><mailman.1766.1107367880.22381.python-list@python.org>
	<1107386243.715419.122470@f14g2000cwb.googlegroups.com>
Message-ID: <ctsk97$og8$1@sea.gmane.org>

John Machin wrote:

>> you should check the return value, though.  PyList_SetItem may (in
>> theory) fail.
>
> :-)
> Only a bot could say that. We mere mortals have been known to do things
> like (a) pass a non-list as the first argument (b) pass an out-of-range
> value for the second argument.

even for trivial code fragments like the one in the original post?

</F> 





From k04jg02 at kzoo.edu  Thu Feb 17 18:18:18 2005
From: k04jg02 at kzoo.edu (dataangel)
Date: Thu, 17 Feb 2005 23:18:18 +0000
Subject: Python, Matlab and AI question
Message-ID: <4215263A.6000304@kzoo.edu>

I'm a student who's considering doing a project for a Machine Learning 
class on pathing (bots learning to run through a maze). The language 
primarily used by the class has been Matlab. I would prefer to do the 
bulk of the project in python because I'm familiar with pygame (for the 
visuals) but I already have a lot of AI code written in Matlab.

I'd like to be able to call Matlab code from within python. I'm not sure 
this is possible. My code runs in Octave just fine. I've heard about 
numerical python and scipy, but I'm not sure what tool is going to mean 
the least amount of recoding for me. At the very least I need to find a 
really fast package for matrix operations.

Anyone have any input on what the best tool for the job would be? I've 
googled, but I figure it's best to ask experience ;)


From erikbethke at gmail.com  Wed Feb  9 08:49:52 2005
From: erikbethke at gmail.com (Erik  Bethke)
Date: 9 Feb 2005 05:49:52 -0800
Subject: Trouble with the encoding of os.getcwd() in Korean Windows
In-Reply-To: <cud2nj$det$1@news6.zwoll1.ov.home.nl>
References: <1107953764.478501.176650@c13g2000cwb.googlegroups.com>
	<cud2nj$det$1@news6.zwoll1.ov.home.nl>
Message-ID: <1107956992.350460.12720@f14g2000cwb.googlegroups.com>

Thank you Vincent, I will try this...

I did get over my troubles with this new code snippet:

      encoding = locale.getpreferredencoding()
      htmlpath = os.getcwd()
      htmlpath = htmlpath.decode( encoding )


That seems to be working well too.  I can write to these files and I
can open them with the file dialog, but this is now failing with the
famous aschii error:

webbrowser.open( htmlpath, True, True )



From peter at engcorp.com  Tue Feb  1 15:01:24 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 01 Feb 2005 15:01:24 -0500
Subject: The next Xah-lee post contest
In-Reply-To: <1107277633.959477.302860@f14g2000cwb.googlegroups.com>
References: <mailman.1568.1107005758.22381.python-list@python.org>
	<ctg6qn$q63$1@solaris.cc.vt.edu>
	<mailman.1572.1107009638.22381.python-list@python.org>
	<e9lpv0tk63k0v7v1lctt0d77f92ub48bl3@4ax.com>
	<20050130114008.797088857.whereU@now.com>
	<mailman.1602.1107115028.22381.python-list@python.org>
	<1107137465.973491.42050@f14g2000cwb.googlegroups.com>
	<fMpLd.101045$Jk5.4448@lakeread01>
	<sqasv0petsjfr0qb9u7e1i30n8mrjl3t78@4ax.com>
	<Q7ednbtYIue5LWLcRVn-2Q@powergate.ca>
	<1107277633.959477.302860@f14g2000cwb.googlegroups.com>
Message-ID: <9sGdnUxGCYePfWLcRVn-pw@powergate.ca>

Luis M. Gonzalez wrote:
> Peter Hansen wrote:
>>Arthur wrote:
>>>And the rules of the game, if he shows?
>>
>>Arthur, if Xah Lee shows up at Pycon, he most definitely will
>>not be giving the best impression...
> 
> Have you visited his website?
> I kind of like this guy... it's like he has a few bugs in his brain,
> but other parts are surprisingly interesting.

Yes I have, though that's not really relevant to my point,
which was (in effect) that if he shows up still claiming to
be qualified to discuss Python -- such as how the tutorial
is not a tutorial, while his is -- then he would definitely
not make any better impression than he's made here.

It was also, though perhaps not successfully, and attempt
at humour, with a pun based on the double meaning of the
word "impression" in English.

But, yes, I visited the site.  And it saddened me in several
ways. :-(  I did not see (nor looked for) the "curves" page,
which from the sounds of it would do much to redeem the
fellow, if only he could learn and practice certain social
skills.**

-Peter

** Such as not massively cross-posting.  And others...


From tim.leslie at gmail.com  Tue Feb  8 20:53:40 2005
From: tim.leslie at gmail.com (Tim Leslie)
Date: Wed, 9 Feb 2005 12:53:40 +1100
Subject: Lambda
In-Reply-To: <9VdOd.110$0b3.4668@news.uswest.net>
References: <9VdOd.110$0b3.4668@news.uswest.net>
Message-ID: <d32b453505020817531c77883@mail.gmail.com>

Short answer:

lambda is a python keyword which allows you to create anonymous
functions which may be considered a useful thing to have in certain
cases*.

Long answer:

To be provided by someone else who isn't meant to be working right now.

Tim

* There is much debate as to just how useful lambda functions are and
they are likely to be removed from the language in the distant futute
(python 3)


On Tue, 8 Feb 2005 17:43:32 -0800, e <e at e.e> wrote:
> Question: WHAT IS LAMBDA? I can't figure out what it does from any
> documentation i've found anywhere. i doubt i need it but i still want to
> know what the heck it is/does/fixes/whatever!
> 
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From Scott.Daniels at Acm.Org  Wed Feb  9 20:48:53 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Wed, 09 Feb 2005 17:48:53 -0800
Subject: A great Alan Kay quote
In-Reply-To: <mailman.2270.1107980587.22381.python-list@python.org>
References: <420a5c1e$0$21630$a1866201@visi.com>	<mailman.2264.1107976858.22381.python-list@python.org>	<420a6491$0$29509$a1866201@visi.com>
	<mailman.2270.1107980587.22381.python-list@python.org>
Message-ID: <420ab9c9$1@nntp0.pdx.net>

Francis Girard wrote:
> ...
> It's also interesting to see GUIs with windows, mouse (etc.), which apparently 
> find their origin in is mind, probably comes from the desire to introduce 
> computers to children.

OK, presuming "origin in is mind" was meant to say "origin in his mind,"
I'd like to stick up for Doug Engelbart (holds the patent on the mouse)
here.  I interviewed with his group at SRI in the ancient past, when
they were working on the "Augmentation Research" project -- machine
augmentation of human intelligence.  They, at the time, were working on
input pointing devices and hadn't yet settled.  The helmet that read
brain waves was doing astoundingly well (90% correct on up, down, left,
right, don't move), but nowhere near well enough to use for positioning
on edits.  This work produced the mouse, despite rumors of Xerox Parc or
Apple inventing the mouse.

Xerox Parc, did, as far as I understand, do the early development on
interactive graphic display using a mouse for positioning on a
graphics screen.  Engelbart's mouse navigated on a standard 80x24
character screen.

Augment did real research on what might work, with efforts to measure
ease of use and reliability.  They did not simply start with a good
(or great) guess and charge forward.  They produced the mouse, and the
earliest "linked" documents that I know of.

     http://sloan.stanford.edu/MouseSite/1968Demo.html

--Scott David Daniels
Scott.Daniels at Acm.Org


From peter at engcorp.com  Tue Feb 22 08:34:10 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 22 Feb 2005 08:34:10 -0500
Subject: How to write a ping client
In-Reply-To: <1109068125.070219.54510@o13g2000cwo.googlegroups.com>
References: <1109039706.092671.137360@f14g2000cwb.googlegroups.com>
	<421a9d54$0$44652$a1866201@visi.com>
	<1109068125.070219.54510@o13g2000cwo.googlegroups.com>
Message-ID: <lI-dnU2WevDWqIbfRVn-hg@powergate.ca>

Harlin wrote:
> whoa... this is not in the standard library, is it? I never knew this
> was out there. Thanks!

You mean, Google?


From ilias at lazaridis.com  Fri Feb 18 13:13:57 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Fri, 18 Feb 2005 20:13:57 +0200
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <1108411893.940158.270090@c13g2000cwb.googlegroups.com>
References: <cuo71l$gig$1@usenet.otenet.gr><cupupa$kfs$2@usenet.otenet.gr>
	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>
	<1108411893.940158.270090@c13g2000cwb.googlegroups.com>
Message-ID: <42163065.8070708@lazaridis.com>

[this is a summary of a private conversation that I had with the 
developer of the phMinGW. It contains just my comments. I've send 
additionally a CC via email (private-to-public switch notification)]

-

A.B., Khalid wrote:
[...]

Khalid,

first of all I like to thank you for the efforts you have taken to
provide pyMinGW to the python community.

I would like to assist you with your efforts, see below.

> If passing all the regression tests of the official Windows Python 
> distribution is an indication of the quality of patch-- and pyMinGW 
> patched and MinGW built Python does pass all of them-- then one is 
> inclined to say that pyMinGW is a good patch.


=> {pyMinGW is a good patch}

> The reason why it is, on the other hand, not included in the official
>  distribution is threefold.
> 
> 1. Contrary to what many might imagine, I don't think enough people
> use MinGW to frankly justify any extra effort beyond pyMinGW.


The defined "extra effort" is the effort to provide the patches for the
main source-code base?

If you can send me an email of how to do this, I would take this effort.

of course I must first know, that the python-team would accept those
patches (technical applicability provided).

Thus this can wait, until an official response.

> 2. Given number 1 above, this patch, I believe, and I could be 
> mistaken, must not rush to be included in Python's core;


Of course you are right.

> people like your esteemed person should test it (note that it is
> designed not to interfere with your trusted and working official
> Python, if any);


=> {trusted and working official python}

: it is

> only when enough people do such testing that there will be a case for
>  it to be included in Python's core.


I agree with you.

If you are willing to extend your project, thus the intrested community
members can collaborate, I would like to assist you to do so.

I would try to take away all setup efforts from you.

> 3. Finally. there is nothing wrong with third-party patches if they
> get the job done, which I believe is the case with pyMinGW.


You have stated above: "trusted and working official python"

The main goal would be, to get a "trusted and working official python"
based on MinGW, _within_ the official source-code-base.

The secondary goal would be, to get a "trusted and working official
python" based on MinGW, _with_ a very close to the official
source-code-base (possibly with just one #define).

-

Please contact me vial email if you are intrested.

> Regards, Khalid


Best Regards,

ILIAS LAZARIDIS

-
-
-

After some comments, [which did not show to me an intrested of making 
the above happen (which is fully in the developers rights)], I've 
simplified my suggestions in the following message:


"
thank you for your comments.

I will express my suggestion more practically

   * as a first step, I would setup a pyMinGW mailinglist
     * intrested people can come together an communicate
   * as a second step, I would setup an SVN
     * intrested projects could get your patch via SVN
   * as a third step, I would find intrested contributors
     * which would help testing
     * which would help you with coding

All this could happen without (or with very low) efforts for you.
"

-
-
-

I got no answer.

-
-
-

.

-- 
http://lazaridis.com


From rnd at onego.ru  Mon Feb  7 07:03:03 2005
From: rnd at onego.ru (Roman Suzi)
Date: Mon, 7 Feb 2005 15:03:03 +0300 (MSK)
Subject: Is email package thread safe?
Message-ID: <Pine.LNX.4.62.0502071500200.13333@suzi.com.onego.ru>


Hi!

Just to be sure, is email package of Python 2.3 thread-safe or not
(to use, for example, in python-milter?)

Sincerely yours,
Roman A.Souzi



From martin at v.loewis.de  Mon Feb 21 17:52:46 2005
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 21 Feb 2005 23:52:46 +0100
Subject: unicode encoding usablilty problem
In-Reply-To: <opsmjaj4d26yt6e7@news.cisco.com>
References: <opsmekm2ei6yt6e7@news.cisco.com>	<42164d01$0$4676$9b622d9e@news.freenet.de>	<opsme4lcjo6yt6e7@news.cisco.com>	<42186016.7030309@v.loewis.de>
	<mailman.2857.1108901156.22381.python-list@python.org>
	<mailman.2860.1108908074.22381.python-list@python.org>
	<opsmjaj4d26yt6e7@news.cisco.com>
Message-ID: <421a663e$0$4938$9b622d9e@news.freenet.de>

aurora wrote:
> What is the processing of getting a PEP work out? Does the work and  
> discussion carry out in the python-dev mailing list? I would be glad to  
> help out especially on this particular issue.

See PEP 1 for the PEP process. The main point is that discussion is
*not* carried out on any specific forum. But instead, the PEP serves
as a container for all possible considerations people come up with,
formally by writing to the PEP author. Of course, they will use
comp.lang.python and python-dev (and perhaps SIG mailing lists)
instead of writing to the PEP author, so the PEP author may need to
track these as well.

The process is triggered by the author posting revisions of the
PEP at a moderate rate, each time claiming "now I think it is
complete". Then, if nobody comes up with a reasoning that is
not yet covered in the PEP, it becomes ready for BDFL
pronouncement. It better also has an implementation at some point
in time.

For a dormant PEP, the prospective author should contact the
original author, and offer co-authoring. Perhaps the original
author even proposes that you can take over the entire thing
sometime.

Notice that, at some point, a patch implementing the PEP will
be needed. So you should indicate from the beginning whether you
are also willing to work on the implementation. If not, there is
a good chance that the PEP again goes dormant after the
specification is complete.

Regards,
Martin



From devrim.erdem at gmail.com  Wed Feb 23 05:37:48 2005
From: devrim.erdem at gmail.com (DE)
Date: 23 Feb 2005 02:37:48 -0800
Subject: Attaching to a Python Interpreter a la Tcl
Message-ID: <1109155068.468295.121630@f14g2000cwb.googlegroups.com>

Hello,

Some long time ago, I used to use Tcl/Tk. I had an tcl embedded into my
app.

The coolest thing was however, I was able to attach to the interpreter
(built in to my app) via a tcl shell in which I could type in regular
tcl code which would be interpreted by the interpreter of my
application. Naturally, it was possible to call tcl functions of my
applications.

Some kind of rapid RPC.

Is this also possible with python ?

Thanks,



From antonmuhin at rambler.ru  Mon Feb 21 14:04:58 2005
From: antonmuhin at rambler.ru (anton muhin)
Date: Mon, 21 Feb 2005 22:04:58 +0300
Subject: multimethod (or rather overloading) in Python
In-Reply-To: <mailman.2849.1108867441.22381.python-list@python.org>
References: <37k236F5fdtu1U1@individual.net> <37k46qF5g7tt4U1@individual.net>
	<mailman.2849.1108867441.22381.python-list@python.org>
Message-ID: <37upmrF5g0ntlU1@individual.net>

Nick Coghlan wrote:
> anton muhin wrote:
> 
>> anton muhin wrote:
>>
>> Correction:
>>
>>> Of course, I can imagine some metaclasses magic that would allow to 
>>> code:
>>>
>>> class MyClass(WithOverloading):
>>>   @overloadMethod(A)
>>>   def someMetod(self, _): ...
>>>
>>> But it would rather convoluted: the best idea I have so far is to 
>>> mangle  methods name in the manner most of C++ compilers do.
> 
> 
> PEAK has a fairly sophisticated implementation of method dispatch you 
> may want to look at.
> 
> http://peak.telecommunity.com/Articles/WhatisPEAK.html
> http://dirtsimple.org/2004/11/generic-functions-have-landed.html
> http://peak.telecommunity.com/doc/src/dispatch/__init__.html
> 
> I'm compelled to point out that PEAK should still be considered a 'work 
> in progress', but PJE's ideas should help you out :)
> 
> Cheers,
> Nick.
> 

Thank you very much, Nick!

anton.


From bifacial at gmail.com  Sun Feb 20 09:18:30 2005
From: bifacial at gmail.com (bifacial at gmail.com)
Date: 20 Feb 2005 06:18:30 -0800
Subject: pyWrath project
In-Reply-To: <1108836599.994746.130750@l41g2000cwc.googlegroups.com>
References: <1108836599.994746.130750@l41g2000cwc.googlegroups.com>
Message-ID: <1108909110.428380.34700@f14g2000cwb.googlegroups.com>

As Felix pointed out, of course link should read

http://sourceforge.net/projects/pywrath

Sorry to everyone who tried to follow crappy link :)



From steven.bethard at gmail.com  Tue Feb  1 00:15:38 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 31 Jan 2005 22:15:38 -0700
Subject: Next step after pychecker
In-Reply-To: <41ff0308$0$6503$636a15ce@news.free.fr>
References: <41ff0308$0$6503$636a15ce@news.free.fr>
Message-ID: <vvadnbwi6_bqjWLcRVn-vQ@comcast.com>

Philippe Fremy wrote:
> I would like to develop a tool that goes one step further than pychecker 
> to ensure python program validity. The idea would be to get close to 
> what people get on ocaml: a static verification of all types of the 
> program, without any kind of variable declaration. This would definitely 
> brings a lot of power to python.

It's a very cool idea, and there was talk of including such a tool in 
Python 3.0, though as yet, no one has volunteered to solve this problem. 
=)  Note that you can't actually really ensure program validity, but you 
can make some educated guesses like pychecker does.  An example:

def f1(a):
     return a + 1

def f2():
     return f1([])

Your suggestion was that this code should be deemed invalid.  But if 
it's followed with:

f1 = ''.join
f2()

where f1 is rebound, then it's perfectly valid code.  That said, I think 
providing "suggestions" like pychecker does is definitely worth pursuing.

> What is in your opinion the best tool to achieve this ? I had an 
> extensive look at pychecker, and it could certainly be extended to do 
> the job. Things that still concern me are that it works on the bytecode, 
> which prevents it from working with jython and the new .NET python.

I don't know much about what pychecker does, but if it works with the 
bytecode, shouldn't it be fine for jython and IronPython?  I thought the 
bytecode was part of the language spec, and what was CPython specific 
was how the bytecodes were actually implemented...

> I am currently reading the documentation on AST and visitor, but I am 
> not sure that this will be the best tool either. The AST seems quite 
> deep and I am afraid that it will make the analysis quite slow and 
> complicated.

You should read up on the recent python-dev discussions about merging 
the AST branch.  I don't know too much about it, but apparently there's 
some work being done currently on how the AST is used in Python.  Sorry 
I don't know more about this...


Steve


From jaco.smuts at clover.co.za  Thu Feb 10 04:06:35 2005
From: jaco.smuts at clover.co.za (Jaco Smuts)
Date: Thu, 10 Feb 2005 11:06:35 +0200
Subject: SAP IDOC with python
Message-ID: <OF718426CA.688EA197-ON42256FA4.002B07CB-42256FA4.00320AF5@clover.co.za>

Hello there

I'm tinkering with parsing SAP IDOC's using Python. (initially reading 
possibly creating later on)

I can get a C header file someCode.h from SAP  describing the contents / 
structure of a document. I  wondered if this file in conjunction with 
SWIG will be any use?

Any one got any experience suggestions on this?

thanks in advance
jaco


From b at b.b  Sun Feb 13 18:37:40 2005
From: b at b.b (Roose)
Date: Sun, 13 Feb 2005 23:37:40 GMT
Subject: builtin functions for and and or?
References: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>
	<37a2i0F58gsbsU1@individual.net>
	<1108335152.338013.45530@z14g2000cwz.googlegroups.com>
Message-ID: <8xRPd.4678$ZZ.3668@newssvr23.news.prodigy.net>

Yeah, as we can see there are a million ways to do it.  But none of them are
as desirable as just having a library function to do the same thing.  I'd
argue that since there are so many different ways, we should just collapse
them into one: any() and all().  That is more in keeping with the python
philosophy I suppose -- having one canonical way to do things.  Otherwise
you could see any of these several ways of doing it in any program, and each
time you have to make sure it's doing what you think.  Each of them requies
more examination than is justified for such a trivial operation.  And this
definitely hurts the readability of the program.


<bearophileHUGS at lycos.com> wrote in message
news:1108335152.338013.45530 at z14g2000cwz.googlegroups.com...
> In Python there are so many ways to do things...
> This looks like another one, I haven't tested it:
>
> not False in imap(pred, iterable)
>
> As usual tests are required to measure the faster one.
> I agree with Roose, there are are some "primitive" operations (like
> this, and flatten, partition, mass removal of keys from a dictionary,
> and few others) that can be added to the language (but I'm still not
> capabable of doing it myself, and Python is free, so it's not right to
> ask people to work for free for us).
>
> Bear hugs,
> Bearophile
>




From snail at objmedia.demon.co.uk  Mon Feb 14 15:18:51 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Mon, 14 Feb 2005 20:18:51 +0000
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr>
	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>
	<guLnmSj92OECFw0L@objmedia.demon.co.uk>
	<1108408914.405899.129990@o13g2000cwo.googlegroups.com>
	<jN8Xe7rj$PECFwHF@objmedia.demon.co.uk>
	<1108411614.268293.61270@z14g2000cwz.googlegroups.com>
Message-ID: <UTO65jureQECFwRY@objmedia.demon.co.uk>

In message <1108411614.268293.61270 at z14g2000cwz.googlegroups.com>, Pat 
<pobrien at orbtech.com> writes
>> What configuration hassle? Can't be any harder than specifying a
>> different CRT surely?
>
>I don't want to have to ask users of my code to have to go through
>this:
>
>http://www.vrplumber.com/programming/mstoolkit/

OK. I misunderstood your original intent. I thought the original 
question was can we redistribute this DLL? I answered this bit. I wasn't 
attempting to answer the larger question about building extensions etc. 
My development environment has all the things in that article by default 
- I wouldn't even start work without them, so I had them "taken for 
granted" in my thoughts. I can see your problem :-) but I have no easy 
answer. Sorry.
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From Michael.Lang at jackal-net.at  Tue Feb 15 16:12:36 2005
From: Michael.Lang at jackal-net.at (Michael Lang)
Date: Tue, 15 Feb 2005 21:12:36 +0000 (UTC)
Subject: Postgres COPY Command with python 2.3 pg
References: <slrnd14dni.2bu.michi@michi.si.eunet.at>
	<42124f26$0$22499$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <slrnd14pe4.dd1.michi@flocke.chester.at>

On 2005-02-15, @(none) <""> wrote:
> Michael Lang wrote:
>> using psql it works fine, but i dont know how to get it working in python.
>> Ive already made the calls but the changes never apper, and no error.
>
> Which Postgres module are you using? I had the exct same problem when I 
> first started using pyPgSQL, until I figured out that I needed to do:
>
>      db = PgSQL.connect(DSN)
>      db.autocommit = 1
>      con = db.cursor()

Hi, 

im using PostgreSQL RPM from Fedora Core3 
$ rpm -q postgresql-python
postgresql-python-7.4.6-1.FC3.2

code looks like
Python 2.3.4 (#1, Oct 26 2004, 16:42:40)
[GCC 3.4.2 20041017 (Red Hat 3.4.2-6.fc3)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import pg
>>> db = pg.DB('bind9', '192.168.192.2', 5432, None, None, 'named', None)
>>> dir(db)
['_DB__args', '_DB__attnames', '_DB__pkeys', '__doc__', '__init__', '__module__', '_do_debug', 'clear', 'close', 'db', 'debug', 'delete', 'endcopy', 'fileno', 'get', 'get_attnames', 'get_databases', 'get_tables', 'getline', 'getlo', 'getnotify', 'insert', 'inserttable', 'locreate', 'loimport', 'pkey', 'putline', 'query', 'reopen', 'reset', 'source', 'transaction', 'update']

so theres no cursor i could try like your code does ... 
thanks for your response ...

>
> In my code.


From dontwant at spam.com  Mon Feb  7 23:56:44 2005
From: dontwant at spam.com (Courageous)
Date: Mon, 07 Feb 2005 20:56:44 -0800
Subject: Big development in the GUI realm
References: <mailman.2135.1107829480.22381.python-list@python.org>
	<e0ag011atnlt5b00klicjol93c7j8fe341@4ax.com>
Message-ID: <ndhg011h971bdl5o1i4k76j6n3tp15m38b@4ax.com>


>OK, so according to Linus, the GPL allows ....

No. Pay attention. Linus has his own revised version, to clarify
this point, and in fact /overruling/ the GPL if the point is
clarified differently by RMS or others.

That's the right of their community, it's /their/ code.

>make calls to the kernel, but TrollTech says the GPL doesn't allow a
>proprietary program to make calls to the Qt library.

That's their prerogative, although TrollTech's authority as an
/interpretational/ entity over the GPL means precisely zero. I
wouldn't push this, though, unless you've got a big litigation
budget.

>It's this double-standard that I find confusing, since both projects
>are said to be based on the same license.

Linus doesn't use "the" GPL, he uses "his" GPL, version-whatever.

Anyway, your safe bet:

Follow the copyright holder's wishes.

That's fair. After all, it's free, so they're doing you a damn
big favor.

C//



From g.brandl-2005-01 at gmx.net  Wed Feb  2 11:39:55 2005
From: g.brandl-2005-01 at gmx.net (Georg Brandl)
Date: Wed, 02 Feb 2005 17:39:55 +0100
Subject: MySQLdb - Tuples
In-Reply-To: <1107353472.796039.293100@g14g2000cwa.googlegroups.com>
References: <3vTLd.19498$Of5.13133@nntpserver.swip.net>
	<1107353472.796039.293100@g14g2000cwa.googlegroups.com>
Message-ID: <36ce2lF51nkkcU1@individual.net>

Andy Dustman wrote:
> #########################################33
> #! /usr/bin/env python
> import MySQLdb
> db=MySQLdb.connect(host='localhost', db='photum_0_6_2', user='root',
> passwd='thkhgfgd')
> c=db.cursor()
> c.execute('select person from persons order by person')
> for (person,) in c: # or c.fetchall() (may be more portable)
> print person
> ################################################
> 
> If you return more than one column, then you don't need the parentheses
> for the tuple unpacking.

You don't need the parentheses for one element either:

for person, in c:
    print person

works perfectly. Note the trailing comma.

Georg


From cam.ac.uk at mh391.invalid  Mon Feb 14 09:03:35 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Mon, 14 Feb 2005 14:03:35 +0000
Subject: goto, cls, wait commands
In-Reply-To: <1108310706.270392.161870@o13g2000cwo.googlegroups.com>
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
	<cuh6fc$ms2$1@gemini.csx.cam.ac.uk>
	<1108310706.270392.161870@o13g2000cwo.googlegroups.com>
Message-ID: <cuqb3q$ol0$1@gemini.csx.cam.ac.uk>

Erik Bethke wrote:
> At least I thought this was funny and cool! -Erik

Thanks. ;)
-- 
Michael Hoffman


From idadesub at gmail.com  Wed Feb  2 21:11:09 2005
From: idadesub at gmail.com (Erick)
Date: 2 Feb 2005 18:11:09 -0800
Subject: Easy Q: dealing with object type
References: <420181b1$1@nntp.zianet.com>
Message-ID: <1107396669.028096.301290@g14g2000cwa.googlegroups.com>

Ah, you're running into the "old-style classes vs. new style classes".
Try subclassing from "object".

For example:

>>> class A(object):
...   pass
...
>>> a=A()
>>> type(a)
<class '__main__.A'>
>>> type(a) == A
True
>>> type(a) is A
True
>>> b=A()
>>> type(a) == type(b)
True
>>> type(a) is type(b)
True


Check out the following article, it should answer your questions:
http://www.python.org/doc/2.2.3/whatsnew/sect-rellinks.html#SECTION000310000000000000000
-e



From fumanchu at amor.org  Fri Feb 18 14:15:25 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Fri, 18 Feb 2005 11:15:25 -0800
Subject: "Best" way to SIGHUP spamd from web page?
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E3398470@exchange.hqamor.amorhq.net>

stephen at theboulets.net wrote:
> Webmin (webmin.com) has a command shell module (cgi over 
> https?). Isn't this an example of a secure way to run
> commands via the internet?

Yes, if I wanted to write my app in Perl 5. ;) But as far as I can tell,
that relies heavily on Perl's taint-checking, which isn't available in
Python.

I ended up writing a daemon (running as root) which simply listens on a
local socket; when it receives any message, it HUPs spamd. Ugly but
effective.


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org


From snail at objmedia.demon.co.uk  Tue Feb 15 18:47:48 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Tue, 15 Feb 2005 23:47:48 +0000
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr> <37bkemF5a7s7vU1@individual.net>
	<cut6nh$rpk$1@usenet.otenet.gr> <86ll9piuj8.fsf@guru.mired.org>
	<cutf1h$576$1@usenet.otenet.gr>
Message-ID: <TS9rJnJkooECFwQs@objmedia.demon.co.uk>

In message <cutf1h$576$1 at usenet.otenet.gr>, Ilias Lazaridis 
<ilias at lazaridis.com> writes
>MinGW compatibility is not [only] my need.
>
>It is an community need [at least partially]

Clearly not. If it was, using your logic, it would already exist.
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From peter at engcorp.com  Mon Feb 28 07:33:25 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 28 Feb 2005 07:33:25 -0500
Subject: Explicit or general importing of namespaces?
In-Reply-To: <38gc2tF5o34sbU1@individual.net>
References: <1109588238.491145.52060@l41g2000cwc.googlegroups.com>
	<38gc2tF5o34sbU1@individual.net>
Message-ID: <MZ6dnUVa97IJkr7fRVn-3w@powergate.ca>

Diez B. Roggisch wrote:
>>I'm unable to tell a real difference other than in the code writing
>>:-).
> 
> The difference is that the from-syntax may cause name space pollution. See
> the FAQ:
> 
> http://www.python.org/doc/faq/programming.html#id12

Ultimately more important than mere "pollution" are the
latent problems this can cause if any of the names in
the original module can ever be re-bound.

Use of the "import *" technique creates module-global names
with bindings to the original objects referenced by the
names in the imported module.  If those names (in the imported
module) are rebound (reassigned) at any time by other
code, whether in the module or elsewhere, this has no
effect on the module-global names created in the _importing_
module, which is quite often a bug.

Small demo:

# module A
x = 5

# module B
import A
A.x = 6

# module C
from A import x
import B
print x


This will not print 5, of course.  In non-trivial code this
sort of problem is much harder to discover and debug.

In general, unless the names being imported are *guaranteed*
never to be rebound, it is a very bad idea to use "import *",
and it's still a bad idea in almost all cases anyway, for
reasons already given by others.

-Peter


From mhartl at post.harvard.edu  Wed Feb 23 22:29:25 2005
From: mhartl at post.harvard.edu (Michael Hartl)
Date: 23 Feb 2005 19:29:25 -0800
Subject: rounding problem
In-Reply-To: <gu6dnWNLB-FHuoDfRVn-tA@comcast.com>
References: <gu6dnWNLB-FHuoDfRVn-tA@comcast.com>
Message-ID: <1109215765.711318.201770@f14g2000cwb.googlegroups.com>

> Is it normal?

Yes.  The interpreter prints back the repr of a, which reflects the
imprecision inherent in floats.  If you want '1.1', use the string
returned by the str function.

>>> a = 1.1
>>> a
1.1000000000000001
>>> repr(a)
'1.1000000000000001'
>>> str(a)
'1.1'

Michael

--
Michael D. Hartl, Ph.D.
CTO, Quark Sports LLC
http://quarksports.com/



From rbt at athop1.ath.vt.edu  Tue Feb 22 20:07:50 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Tue, 22 Feb 2005 20:07:50 -0500
Subject: searching pdf files for certain info
In-Reply-To: <mailman.2950.1109120060.22381.python-list@python.org>
References: <cvfdgg$fr0$1@solaris.cc.vt.edu>
	<cvfg5a$6g6$1@news.mch.sbs.de>	<cvfhe5$lcv$1@solaris.cc.vt.edu>
	<cvfi2q$dto$1@news.mch.sbs.de>	<cvfk26$qb3$1@solaris.cc.vt.edu>	<mailman.2937.1109088725.22381.python-list@python.org>	<cvfmok$11l$1@solaris.cc.vt.edu>
	<mailman.2950.1109120060.22381.python-list@python.org>
Message-ID: <cvgl0k$fqq$1@solaris.cc.vt.edu>

Tom Willis wrote:
> Well sporadic spaces in strings would cause problems would it not?
> 
> an example....
> 
> 
> The String: "Patient Face Sheet"--->pdftotext--->"P a tie n t Face Sheet"
> 
> I'm just curious if you see anything like that, since I really have no
> clue about ps or pdf etc...but I have a strong desire to replace a
> really flaky commercial tool. And if I can do it with free stuff, all
> the better my boss will love me.

No, I do not see that type of behavior. I'm looking for strings that 
resemble SS numbers. So my strings look like this: nnn-nn-nnnn.

The ps2ascii util in ghostscript reproduces strings in the format that I 
expect. BTW, I'm not using pdftotext. I'm using *ps2ascii*.


From dan.gass at gmail.com  Tue Feb  1 13:56:41 2005
From: dan.gass at gmail.com (dan.gass at gmail.com)
Date: 1 Feb 2005 10:56:41 -0800
Subject: cfgparse v01_00 released
References: <mailman.1613.1107137102.22381.python-list@python.org>
	<ctncb6$6hg$1@ctb-nnrp2.saix.net>
Message-ID: <1107284201.877860.99050@f14g2000cwb.googlegroups.com>

> I like this, its really nice that it fits well with optparse.

Thanks.

> I read through the docs, mostly it seems very logical, the following
> things stood out to me as not really fitting:
>
> http://cfgparse.sourceforge.net/cfgparse-round-trip-set.html
> It doesn't seem logical that in order to modify the option in the
> desired section correctly, you need to pass the config file in. The
keys
> argument in the option itself should be able to determine this.

There is a lot of necessary flexibility built into the interfaces for
round trip and it sounds like it is tripping you up.  The user may
choose to split their configuration up into multiple files and use
<include> to pull it all together.  When you program your application
you have a choice.  Don't pass in a config file object and let it set
the option where ever the user has it --OR-- pass in the configuration
file object where you want it set and it won't matter where the user
put it.  BTW, since you may not know where the user put the setting,
the set() method returns the config file object that was updated so
that you may write its contents out.  I just noticed this is
undocumented and I will fix that in the next release.

> http://cfgparse.sourceforge.net/node24.html
> The use of <b> and <v> for quoting seems obscure. Would it not be
better
> to use pythonic triple-quoted strings?
> On first glance they look like markup tags rather than multi-line
> continuations (particularly <b> looks like "bold").

I did consider triple quotes but decided against it for the following
reasons:

1) I couldn't think of a good way to distinguish between blocks and
verbatim blocks without it being too subtle.
2) XML encapsulation may be more understandable to the majority of end
users (of which many are not Python programmers).
3) XML offers a style that will be extensible for future additions.

I'm not opposed to changing this area but it will need good a argument
and consensus.


> The fact that lines without an equals sign are ignored seems a bit
> lenient ...

Perhaps.  If I get good arguments as to why it should be more stringent
and a consensus is formed this could be changed.


> It also seems strange how different the structure is between the
> ini-style and the Python-style formats:
> http://cfgparse.sourceforge.net/cfgparse-python.html
>
> driver = 'ethernet'
> path = { 'DEFAULT' : '192.168.0.99',
>           'DEV0'    : '192.168.0.0',
>           'DEV1'    : '192.168.0.1' }
>
> Is equivalent to:
>
> [DEFAULT]
> driver = 'ethernet'
> path = 192.168.0.99
> [DEV0]
> path = 192.168.0.0
> [DEV1]
> path = 192.168.0.1
>
> I wonder whether it would be better to use Python classes to
represent
> the same thing:
>
> class DEFAULT:
>    driver = 'ethernet'
>    path = '192.168.0.99'
>
> class DEV0(DEFAULT):
>    path = '192.168.0.0'
>
> class DEV1(DEFAULT):
>    path = '192.168.0.1'
>
> This seems to me to bear more logical structure resemblance to the
> ini-style format.

Classes cannot be used because they have a restricted character set.
The INI style was implemented to be similar to what is already in the
standard library and has the benefits of simplicity yet maitains a lot
of flexibility.  Because of this I'm anticipating it to be the style of
choice by the vast majority.  The Python style is for power users.  I
believe both styles lend themselves to visualizing how all the settings
get blended together in a master dictionary.

I'm open to tweaking the Python syntax if there are good arguments and
concensus.


> Otherwise really cool!

Thanks again for your feedback.  It is appreciated.  I've spent a fair
amount of time implementing and testing features that I don't really
use in order to be able to contribute this to the Python community.  If
you would like to see it (or see specific features it has) in the
standard library I encourage you to make comments at
http://www.python.org/moin/ConfigParserShootout

Regards,
Dan Gass



From jeff at ccvcorp.com  Fri Feb  4 18:54:18 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Fri, 04 Feb 2005 15:54:18 -0800
Subject: changing local namespace of a function
In-Reply-To: <cu0lru$8ik$1@joe.rice.edu>
References: <cu0lru$8ik$1@joe.rice.edu>
Message-ID: <11082ntjhddo357@corp.supernews.com>

Bo Peng wrote:

> My function and dictionaries are a lot more complicated than these so I 
> would like to set dict as the default namespace of fun. 

This sounds to me like you're trying to re-implement object orientation.

Turn all of those functions into methods on a class, and instead of 
creating dictionaries that'll be passed into functions, create class 
instances.

class MyClass(object):
     def __init__(self, **kwargs):
         for key, val in kwargs:
             setattr(self, key, val)
     def fun(self):
         self.z = self.y + self.x

a = MyClass(x=1, y=2)
a.fun()
print a.z

Jeff Shannon
Technician/Programmer
Credit International




From onurb at xiludom.gro  Tue Feb 15 12:54:19 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Tue, 15 Feb 2005 18:54:19 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cut6t9$sla$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr>
	<XX+64LRqnLECFwAV@objmedia.demon.co.uk>
	<cut6t9$sla$1@usenet.otenet.gr>
Message-ID: <42123751$0$10042$626a14ce@news.free.fr>

Ilias Lazaridis wrote:
> 
> there are other reasons behind the decision to not support the MinGW 
> open-source-complier directly out of the main source-code base.
> 
Yes, of course. The reason is they are lying about their commitment to 
open source. They are currently trying to port Python to .NET, and when 
done they'll retire the current implementation and lock everyone to a 
proprietary platform. I know it's hard to believe, but there are clues...

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for 
p in 'onurb at xiludom.gro'.split('@')])"


From aurora00 at gmail.com  Fri Feb 25 12:54:22 2005
From: aurora00 at gmail.com (aurora)
Date: Fri, 25 Feb 2005 09:54:22 -0800
Subject: Unit testing - one test class/method, or test class/class
References: <87y8ddywr9.fsf@titan.staselog.com>
Message-ID: <opsmrlcwyz6yt6e7@news.cisco.com>

I do something more or less like your option b. I don't think there is any  
orthodox structure to follow. You should use a style that fit your taste.

What I really want to bring up is your might want to look at refactoring  
your module in the first place. 348 test cases for one module sounds like  
a large number. That reflects you have a fairly complex module to be  
tested to start with. Often the biggest benefit of doing automated unit  
testing is it forces the developers to modularize and decouple their code  
in order to make it testable. This action alone improve that code quality  
a lot. If breaking up the module make sense in your case, the test  
structure will follows.

>
> Hi,
>
> I just found py.test[1] and converted a large unit test module to py.test
> format (which is actually almost-no-format-at-all, but I won't get there
> now). Having 348 test cases in the module and huge test classes, I  
> started
> to think about splitting classes. Basically you have at least three  
> obvious
> choises, if you are going for consistency in your test modules:
>
> Choise a:
>
> Create a single test class for the whole module to be tested, whether it
> contains multiple classes or not.
>
> ...I dont think this method deserves closer inspection. It's probably  
> rather
> poor method to begin with. With py.test where no subclassing is required
> (like in Python unittest, where you have to subclass unittest.TestCase)
> you'd probably be better off with just writing a test method for each  
> class
> and each class method in the module.
>
> Choise b:
>
> Create a test class for each class in the module, plus one class for any
> non-class methods defined in the module.
>
> + Feels clean, because each test class is mapped to one class in the  
> module
> + It is rather easy to find all tests for given class
> + Relatively easy to create class skeleton automatically from test module
>   and the other way round
>
> - Test classes get huge easily
> - Missing test methods are not very easy to find[2]
> - A test method may depend on other tests in the same class
>
> Choise c:
>
> Create a test class for each non-class method and class method in the  
> tested
> module.
>
> + Test classes are small, easy to find all tests for given method
> + Helps in test isolation - having separate test class for single method
>   makes tested class less dependent of any other methods/classes
> + Relatively easy to create test module from existing class (but then you
>   are not doing TDD!) but not vice versa
>
> - Large number of classes results in more overhead; more typing, probably
>   requires subclassing because of common test class setup methods etc.
>
> What do you think, any important points I'm missing?
>
> Footnotes:
> [1]  In reality, this is a secret plot to advertise py.test, see
>      http://codespeak.net/py/current/doc/test.html
>
> [2] However, this problem disappears if you start with writing your tests
>     first: with TDD, you don't have untested methods, because you start  
> by
>     writing the tests first, and end up with a module that passes the  
> tests
>
> --
> # Edvard Majakari		Software Engineer
> # PGP PUBLIC KEY available    	Soli Deo Gloria!
> One day, when he was naughty, Mr Bunnsy looked over the hedge into Farmer
> Fred's field and it was full of fresh green lettuces. Mr Bunnsy,  
> however, was
> not full of lettuces. This did not seem fair.  --Mr Bunnsy has an  
> adventure



From jello at comics.com  Tue Feb  8 09:32:40 2005
From: jello at comics.com (rzed)
Date: Tue, 08 Feb 2005 14:32:40 GMT
Subject: Curses on Windows
References: <72c8d50d.0502060630.1c561599@posting.google.com>
	<1107862660.561823.111110@g14g2000cwa.googlegroups.com>
Message-ID: <Xns95F761FF87D3Ejreeder@63.223.5.95>

"Martin Miller" <marmille at gmail.com> wrote in 
news:1107862660.561823.111110 at g14g2000cwa.googlegroups.com:

> I just tried the flangy.com link and it appears to be OK now.
> 
> Martin
> 
> ============
> Peter wrote:
>> ...
>> One reply (in fact the only reply - thanks Tim Golden) suggested I
>> look at http://flangy.com/dev/python/curses/
> 

But this one is still forbidden, at least for me:
http://flangy.com/dev/python/curses/files/wcurses-0.1-py2.4.zip

-- 
rzed



From duncan.booth at invalid.invalid  Mon Feb  7 06:08:33 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 7 Feb 2005 11:08:33 GMT
Subject: Get importer module from imported module
References: <mailman.2058.1107773305.22381.python-list@python.org>
Message-ID: <Xns95F67153AE259duncanrcpcouk@127.0.0.1>

dody suria wijaya wrote:

> 
> I found this problem when trying to split a module into two.
> Here's an example:
> 
>==============
> #Module a (a.py):
> from b import *
> class Main: pass
>==============
> 
>==============
> #Module b (b.py)
> def How():
>     Main_instance = module_a.Main()
>     return Main_instance
>==============
> 
>> import a
>> a.How()
> 
> 
> the problem would show at How() function. I have been unable
> to get variable pointing to module a from inside module b.
> In short, I need to have a variable pointing to the module
> whose importing me.
> 
> 

'import a' will let you reference module 'a', unless 'a' was invoked as a 
script in which case you would need 'import __main__'.

#Module b (b.py)
import a
def How():
    Main_instance = a.Main()
    return Main_instance

But: keep in mind that all statements (except 'global') are executable in 
Python, so you must not call How() until after the Main class has actually 
been created. This is one reason why it is generally safer to import a 
module and do the lookup when you need it instead of using 'from 
amodule import *' which can only get at the names which exist at the time 
it is executed.

A better solution  would be to structure your code so that your modules 
don't have any mutual dependencies. If your function 'How()' is in module b 
then just call 'b.How()' wherever you use it and lose the import of 'b' 
from 'a' altogether.


From vinay_sajip at yahoo.co.uk  Fri Feb 25 16:21:10 2005
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: Fri, 25 Feb 2005 21:21:10 +0000 (UTC)
Subject: unicode encoding usablilty problem
References: <opsmekm2ei6yt6e7@news.cisco.com>	<mailman.2811.1108751132.22381.python-list@python.org>	<opsmepfmcx6yt6e7@news.cisco.com>
	<mailman.2813.1108754311.22381.python-list@python.org>
	<cv5j2o$ng5$1@atlantis.news.tpi.pl>
Message-ID: <loom.20050225T222023-599@post.gmane.org>

> This will help in your code, but there is big pile of modules in stdlib 
> that are not unicode-friendly. From my daily practice come shlex 
> (tokenizer works only with encoded strings) and logging (you cann't 
> specify encoding for FileHandler).

You can, of course, pass in a stream opened using codecs.open to StreamHandler.
Not quite as friendly, I'll grant you.

Regards,


Vinay Sajip 






From fredrik at pythonware.com  Mon Feb 14 09:46:11 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 15:46:11 +0100
Subject: safest way to open files on all platforms
References: <cuqbo6$hp6$1@solaris.cc.vt.edu><mailman.2532.1108390847.22381.python-list@python.org>
	<cuqcqn$jho$1@solaris.cc.vt.edu>
Message-ID: <cuqdf6$6s8$1@sea.gmane.org>

"rbt" wrote:

> I'm using 'rb' in a situation where all files on the drive are opened. I'm not checking how the 
> file is encoded before opening it (text, unicode, jpeg, etc.) That's why I though 'rb' would be 
> safest.

if "safest way to open files" meant "safest way to open binary files", why
didn't you say so in your first post?

> Can 'U' be used with 'rb'? Should it be?

"U" is for text files, "b" is for binary files.  binary files contain bytes, text
files contain text.  if you're opening a file to read it as text (readline, read-
lines, iteration, etc), use "r" or "rU".  if you're opening a file to read it as
binary bytes (read), use "rb".

</F> 





From jgrahn-nntq at algonet.se  Sat Feb 26 21:07:53 2005
From: jgrahn-nntq at algonet.se (Jorgen Grahn)
Date: 27 Feb 2005 02:07:53 GMT
Subject: Dealing with config files what's the options
References: <mailman.2952.1109122710.22381.python-list@python.org>
	<slrnd1v6rp.nhu.jgrahn-nntq@frailea.sa.invalid>
	<421FA05C.4020700@pythonapocrypha.com>
	<mailman.3076.1109386460.22381.python-list@python.org>
Message-ID: <slrnd22ap1.nhu.jgrahn-nntq@frailea.sa.invalid>

On Fri, 25 Feb 2005 21:54:16 -0500, Tom Willis <tom.willis at gmail.com> wrote:
> On Fri, 25 Feb 2005 15:02:04 -0700, Dave Brueck
> <dave at pythonapocrypha.com> wrote:
>> Jorgen Grahn wrote:
...
>> > How about writing them in Python?
...
> I actually thought of this, and I was kind of on the fence due to the
> intended audience.
>
> I don't think it's too much to ask that they are comfy with the
> concept of variables. I mean, if it was a shell script they'd be at
> the top of the file anyway.
> 
> Then again I'm some what hesitant to help them make the connection
> that I'm giving them the ability to indirectly edit the code. Kind of
> like opening pandoras box. Once the figure out they can open any file
> (*.py) with notepad, there will be utter anarchy and I'll get the call
> at 4am that somethings wrong with the production data.

There's two issues there.

One is about hiding knowledge from the users.  I'm against that; this isn't
the middle ages. If they shoot themselves in the foot, that is /their/
problem, not yours. You support /your/ code, not whatever they hack together.
And with 99.999% certainty, they won't touch it.

The other is about the config file messing up the environment for your main
program. Seems hard to do by mistake -- you'd have to write endless loops or
import modules and modify them, or someting. I seem to recall that you can
evaluate a piece of code in a separate environment/sandbox -- maybe that's
the way to go?

(Personally, I try to avoid designs which need config files. If I /did/ need
one I'd steal the design from some well-known Unix program, because that's
my primary target, and I'd prefer not to lock myself into Python -- I might
want to rewrite the thing in C, or Perl, or ...)

/Jorgen

-- 
  // Jorgen Grahn <jgrahn@       Ph'nglui mglw'nafh Cthulhu
\X/                algonet.se>   R'lyeh wgah'nagl fhtagn!


From rbt at athop1.ath.vt.edu  Tue Feb 22 08:53:20 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Tue, 22 Feb 2005 08:53:20 -0500
Subject: searching pdf files for certain info
Message-ID: <cvfdgg$fr0$1@solaris.cc.vt.edu>

Not really a Python question... but here goes: Is there a way to read 
the content of a PDF file and decode it with Python? I'd like to read 
PDF's, decode them, and then search the data for certain strings.

Thanks, rbt


From steven.bethard at gmail.com  Tue Feb 15 16:35:12 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 15 Feb 2005 14:35:12 -0700
Subject: Calling a function from module question.
In-Reply-To: <3LtQd.32674$6u.18210@fed1read02>
References: <UTsQd.32669$6u.27954@fed1read02>
	<42125d6d$0$28977$e4fe514c@news.xs4all.nl>
	<3LtQd.32674$6u.18210@fed1read02>
Message-ID: <c5SdndbH1vSS9o_fRVn-sQ@comcast.com>

Sean wrote:
>>Sean wrote:
>>
>>>Then I would have a script that uses the
>>>print_this function defined in the module
>>>without using the module name in the call.
>>
>>from module_name import print_this
>>
>>or, even:
>>
>>from module_name import print_this as other_nice_name
> 
> So what if I have a whole bunch of functions - say 25 of them.
> Is there a way to do this without naming each function?

Yes [1], but it's basically deprecated and you shouldn't use it. 
Consider refactoring your code.

Steve

[1] http://docs.python.org/ref/import.html


From andymac at bullseye.apana.org.au  Thu Feb 10 07:02:46 2005
From: andymac at bullseye.apana.org.au (Andrew MacIntyre)
Date: Thu, 10 Feb 2005 22:02:46 +1000
Subject: Freebsd thread/signal problem
In-Reply-To: <1f060c4c05020911385282d281@mail.gmail.com>
References: <1f060c4c05020911385282d281@mail.gmail.com>
Message-ID: <420B4D66.9050300@bullseye.apana.org.au>

snacktime wrote:

>  This is on freebsd 5.3-release-p2 with python 2.4 and twisted both
> installed from ports.  I tested it on Debian (sarge) and the signals
> work fine.

I don't have a 5.x system usable at the moment, but last time I looked 
there were 3 possible threading options - the 4.x libc_r, libksr and 
libthr.  You should determine which it is and see whether one of the 
alternatives changes the behaviour in your favour.

> It's like there is some sort of event loop that isn't working
> correctly.  Freebsd is obviously getting the signal, but it doesn't
> act on it until another request comes in from the client.

There are semantic differences between Linux & *BSD kernels regarding 
interruptability of certain system calls (at least in the presence of 
threads).

If the twisted reactor is using read() instead of recv() this may 
explain what you are seeing.  You may find some bits in the comments and 
attachments of SF #944119 which could be used to test the signal 
behaviour.  In particular the C test case could be used to verify the 
behaviour of the differing threads implementations (on FreeBSD 4.8 with 
libc_r, the test case must be SIGKILLed whereas without threads it works).

There is old wisdom that signals and threads should not be mixed, as the
behaviour is not well defined across platforms.

-------------------------------------------------------------------------
Andrew I MacIntyre                     "These thoughts are mine alone..."
E-mail: andymac at bullseye.apana.org.au  (pref) | Snail: PO Box 370
         andymac at pcug.org.au             (alt) |        Belconnen ACT 2616
Web:    http://www.andymac.org/               |        Australia


From whereU at now.com  Wed Feb  2 01:54:05 2005
From: whereU at now.com (Eric Pederson)
Date: Tue, 1 Feb 2005 22:54:05 -0800
Subject: variable declaration
In-Reply-To: <NLCdnUhyNdTjbGLcRVn-2A@telcove.net>
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<uImdnUAKxbKaFWPcRVn-2A@telcove.net>
	<1107205410.367521.50490@f14g2000cwb.googlegroups.com>
	<44SdnUZGopnrAWLcRVn-pg@telcove.net>
	<1107275364.730411.24710@c13g2000cwb.googlegroups.com>
	<1grbjim.1pkh5toxl7g9dN%aleaxit@yahoo.com>
	<1107290630.115616.322680@z14g2000cwz.googlegroups.com>
	<NLCdnUhyNdTjbGLcRVn-2A@telcove.net>
Message-ID: <20050201225405.1845559121.whereU@now.com>

"Thomas Bartkus" wrote

> As has been pointed out, it's not a big deal for a programmer who's 
> been
> there, done that. But the original posters example is a beginners trap 
> for
> certain.
> 
> *If* Python were a "beginners language", then it would be missing one 
> of
> it's training wheels.


If you put training wheels on your bicycle, it's not going to be any good for moderately serious cycling.  The OP was clearly not new to programming, and it was a hypothetical problem.

We're all adults here (even my 12 year old!) - and we have only beginners in my house.  This purported wart has never bothered me  -- Python is so friendly to develop in.  If this sort of code error bites my 12 year old, I'm sure he will be able to find it and feel good about fixing it.  It's not the kind of code error that has you shutting down your computer at 4AM, perplexed and frustrated - those feelings are usually attributable to subtle, complex, dastardly language features (unexpected behavoirs).  Just my opinion, of course.

Among the great and enlightening posts in this thread, I liked this:

QOTW?
"""We should concentrate on *real* problems, ones that exist in real code, not ones that mostly
exist in wild-eyed prose that consists of predictions of pain and death
that conspicuously fail to occur, no matter how many times they are
repeated or we are exhorted to heed them or face our doom. """

http://groups-beta.google.com/group/comp.lang.python/messages/178fef06830cc779?thread_id=a75da70b0845b6fe&mode=thread&noheader=1#doc_178fef06830cc779


[Go PyPy!]



Eric Pederson
http://www.songzilla.blogspot.com

:::::::::::::::::::::::::::::::::::
domainNot="@something.com"
domainIs=domainNot.replace("s","z")
ePrefix="".join([chr(ord(x)+1) for x in "do"])
mailMeAt=ePrefix+domainIs
:::::::::::::::::::::::::::::::::::



From zanesdad at bellsouth.net  Wed Feb  9 10:35:00 2005
From: zanesdad at bellsouth.net (Jeremy Jones)
Date: Wed, 09 Feb 2005 10:35:00 -0500
Subject: multi threading in multi processor (computer)
In-Reply-To: <420a2938$0$22987$626a14ce@news.free.fr>
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<420a2938$0$22987$626a14ce@news.free.fr>
Message-ID: <420A2DA4.3060708@bellsouth.net>

Pierre Barbier de Reuille wrote:

> ajikoe at gmail.com a ?crit :
>
>> Hello,
>>
>> Is anyone has experiance in running python code to run multi thread
>> parallel in multi processor. Is it possible ?
>>
>> Can python manage which cpu shoud do every thread?
>>
>> Sincerely Yours,
>> Pujo
>>
>
> There's just no way you can use Python in a multi-processor environment,

This isn't exactly correct.  There is no way with plain, out of the box 
Python (and writing plain Python code) to take full advantage of 
multiple processors using a single process.  A single plain vanilla 
Python process will saturate at most one CPU.  I think that's what you 
were trying to express, but I thought it would be best to clarify.  The 
machine I'm running on right now is a dual-CPU machine.  I can 
*definitely* run Python on it.  I haven't tried threading just yet since 
it's a new-to-me machine.  But if I were to watch gkrellm, I would 
expect to see a CPU intensive (multithreaded) process flip back and 
forth between the two CPUs, taking its turn totally saturating both of 
them, one at a time.


> because the GIL (Global Interpreter Lock) will prevent two threads 
> from running concurrently. When I saw this discussed, the Python 
> developper were more into multi-process systems when it comes to 
> multi-processors.
> I think I even heard some discussion about efficient inter-process 
> messaging system, but I can't remember where :o)
>
> Hope it'll help.
>
> Pierre

Jeremy Jones

From steven.bethard at gmail.com  Fri Feb 11 18:19:56 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 11 Feb 2005 16:19:56 -0700
Subject: check if object is number
In-Reply-To: <374s89F58hlbrU1@individual.net>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
	<374ho0F560ughU1@individual.net>
	<66WdnbJbuf5yj5DfRVn-iA@comcast.com>
	<374lklF5b20klU1@individual.net>
	<Rbydncek9t43qZDfRVn-sQ@comcast.com>
	<374s89F58hlbrU1@individual.net>
Message-ID: <0LKdnRi5pa8EoJDfRVn-hw@comcast.com>

George Sakkis wrote:
> For the record, here's the arbitrary and undocumented (?) order
> among some main builtin types:
> 
>>>>None < 0 == 0.0 < {} < [] < ""  < ()

If you're curious, you can check the source code.  Look for 
default_3way_compare in object.c.  Basically the rundown for dissimilar 
types is:

* None is smaller than anything
* Numbers (as defined by PyNumber_Check) are smaller than everything else
* All other types are compared by type name (and by the address of the 
type object if the type names are the same).

Pretty arbitrary, yeah. ;)

Steve


From steven.bethard at gmail.com  Sun Feb  6 17:44:21 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 06 Feb 2005 15:44:21 -0700
Subject: loops -> list/generator comprehensions
In-Reply-To: <1grl53q.ee7g9b1m2pfy9N%aleaxit@yahoo.com>
References: <1107718117.221204.80410@l41g2000cwc.googlegroups.com>
	<opsls54qat1js0xs@news.telkomsa.net>
	<4qCdnXI11-vhGJvfRVn-vQ@comcast.com>
	<opsls8buf21js0xs@news.telkomsa.net>
	<asSdncm4c9J1DJvfRVn-gw@comcast.com>
	<1grl53q.ee7g9b1m2pfy9N%aleaxit@yahoo.com>
Message-ID: <OJ6dnbGvcfRdAJvfRVn-ow@comcast.com>

Alex Martelli wrote:
> Steven Bethard <steven.bethard at gmail.com> wrote:
> 
> 
>>at the OP's original code, the line:
>>
>> [(x[0], x[2]) for x in os.walk(".")]
>>
>>is the equivalent of:
>>
>> [dirpath, filenames for dirpath, dirnames, filenames in os.walk('.')]
> 
> 
> Just a nit: you need parentheses in your second LC too, i.e.:
> 
>  [(dirpath, filenames) for dirpath, dirnames, filenames in os.walk('.')]

Yup, you're right (of course) ;)  Thanks for the catch!

Steve


From donn at u.washington.edu  Thu Feb  3 14:54:47 2005
From: donn at u.washington.edu (Donn Cave)
Date: Thu, 03 Feb 2005 11:54:47 -0800
Subject: debugging os.spawn*() calls
References: <16890.22749.899414.324589@montanaro.dyndns.org>
	<mailman.1515.1106926549.22381.python-list@python.org>
Message-ID: <donn-D19D2F.11544703022005@gnus01.u.washington.edu>

In article <mailman.1515.1106926549.22381.python-list at python.org>,
 Martin Franklin <mfranklin1 at gatwick.westerngeco.slb.com> wrote:

> Skip Montanaro wrote:
> > I have an os.spawnv call that's failing:
> > 
> >     pid = os.spawnv(os.P_NOWAIT, "ssh",
> >                     ["ssh", remote,
> >                      "PATH=%(path)s nice -20 make -C %(pwd)s" % locals()])
> > 
> > When I wait for it the status returned is 32512, indicating an exit status
> > of 127.  Unfortunately, I see no way to collect stdout or stderr from the
> > spawned process, so I can't tell what's going wrong.
> > 
> > The "ssh remotehost PATH=$PATH nice -20 make ..." command works fine from a
> > similar shell script.
...
> While not a 'real' answer - I use pexpect to automate my ssh scripts 
> these days as I had a few problems using ssh with the os.* family 
> perhaps you may find pexpect a wee bit easier...

Also, a "-n" can also improve reliability.  By default,
ssh assumes that you meant to copy data as input to the
remote command, and it does so if it can.  Very likely
at the expense of some other process that you expected
would be able to read that data later.  -n informs ssh
that you don't intend to provide any data to the remote
command.

But that's probably not the present problem.  (Not that
it's really all that "present" by now!)  127 seems to
mean that the "ssh" command couldn't be found or couldn't
be executed.

I guess if something like that were really getting me
down, I might rewrite os._spawnvef with a pipe.  On
entering the except clause I'd format the exception
and write it to the pipe;  otherwise, I'd just close
the pipe.  The parent could then read the pipe, even
for a NOWAIT case like this, and possibly contrive to
re-raise the fork's exception if one showed up.  This
would account for the class of errors that occurs between
the fork and the exec.  The _spawnvef I'm looking at
doesn't account for these very well - 127 covers a lot
of ground, and there wouldn't be much in the way of
error output.

   Donn Cave, donn at u.washington.edu


From pierre.barbier at cirad.fr  Sun Feb 27 09:00:45 2005
From: pierre.barbier at cirad.fr (Pierre Barbier de Reuille)
Date: Sun, 27 Feb 2005 15:00:45 +0100
Subject: Controlling Pc From Server?
In-Reply-To: <mailman.3116.1109511636.22381.python-list@python.org>
References: <mailman.3116.1109511636.22381.python-list@python.org>
Message-ID: <4221d223$0$31841$636a15ce@news.free.fr>

andrea_gavana at tin.it a ?crit :
> Hello Kartic & NG,
> 
>      Thank you for your prompt answer. In effect, I'm trying to work on
> a NT network of 6 PC (plus the server). Sorry to not have been clearer.
> Ideally, I'm trying to monitor the Internet activity of each client (PC)
> on this network (but I'm not a boss trying to control my emplyees, I'm just
> curious on it). I would like to know which PC is connected to Internet (by
> starting something like a "timer" for every PC, and then periodically check
> if a particular PC is connected or not). This should be done from the main
> server. 
> Did I make myself clear? Do you think it would be a huge task?
> 
> Sorry, it may be a very basic question, but thank you for your help.
> 
> Andrea.
> 
> 

If what you want is to monitor internet requests, the best place to do 
so is the gateway of your network. If you don't have access to the 
gateway, you can always set your server as the gateway for your machines 
and your server will need to redirect the IP flux to the real gateway. 
That way, you don't need anything on the client side. On the server, 
just look at the fluxes toward the internet and you can do wathever you 
want with it. After that, as I don't know the windows implementation of 
a gateway, I can't help you ...

Pierre


From gabriel.barros at gmail.com  Sat Feb 12 16:32:28 2005
From: gabriel.barros at gmail.com (Gabriel B.)
Date: Sat, 12 Feb 2005 19:32:28 -0200
Subject: tk resource file for geometry?
Message-ID: <5175a81c05021213322597c0d9@mail.gmail.com>

i'm using almost every widget property from my pyTk programs in the
form of resources, like:
  self.tk.option_add ( "*InputClass*background", "White" )

In the widget creation i have only the Class and the Command
attribute, but i'm having to add some tk options to the geometry
method, in the case, pack. Is there a way to overcome this?

For example, every single Frame i pack i use
  self.pack(fill='both', expand=1)
I'd love to have something like:
  self.tk.option_add ( "*Frame*fill", 'both' )
  self.tk.option_add ( "*Frame*expand", 'yes' )

Is there anything like it?

Thanks,


From jeff at ccvcorp.com  Wed Feb 16 18:00:46 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Wed, 16 Feb 2005 15:00:46 -0800
Subject: super not working in __del__  ?
In-Reply-To: <mailman.2721.1108588986.22381.python-list@python.org>
References: <cuu0pu$t44$1@sea.gmane.org>
	<cuuqrr$f1o$1@sea.gmane.org>	<mailman.2697.1108571847.22381.python-list@python.org>	<11171oljbbb5cd3@corp.supernews.com>
	<mailman.2721.1108588986.22381.python-list@python.org>
Message-ID: <1117k2oedccgidb@corp.supernews.com>

Christopher J. Bottaro wrote:


> So encapsulating your script in a main function fixes the problem:

Not necessarily.

> because all the objects instantiated in main() will be deleted when main
> ends, but before the interpreter shuts down, thus the objects will have
> access to all the symbols in module's __dict__ (or however that works).

What about default function parameters?  Those can't be cleaned up 
until the function is deleted.  What about class attributes, which 
can't be cleaned until the class is deleted?  What about objects which 
have had references passed to other modules?  What about sets of 
objects with cyclical references?

There's too many corner cases and special cases for this to be 
reliable.  Cutting down on module-global variables will help (and is a 
good idea anyhow), but it's not perfect.

I'm just guessing, here, but I'd imagine that it might be possible to 
modify the interpreter so that, at shutdown, it carefully builds 
dependency trees and then walks through them in reverse, deleting 
objects in the "proper" order, and trying to handle cycles as sanely 
as possible.  You could probably get the __del__ of almost every 
object to be fairly reliable.  But that's a lot of work to go to when 
99% of the time all you need to do is flush the entire block of 
memory.  (By 'a lot of work', I mean both in execution time causing 
the shutdown of Python to be notably slower, and in developer time 
writing such a fancy shutdown scheme.)  It's much more practical to 
just say that __del__() is not reliable (especially given some of the 
other issues with it, such as cyclic references, etc.) and suggest 
that people write their code in such a way that it isn't required.

Python's __del__() is not a C++/Java destructor.  Trying to make it 
into one is unlikely to give an overal benefit.

Jeff Shannon
Technician/Programmer
Credit International



From simonwittber at gmail.com  Tue Feb 22 00:05:10 2005
From: simonwittber at gmail.com (Simon Wittber)
Date: Tue, 22 Feb 2005 13:05:10 +0800
Subject: pyrex just in time compilation
In-Reply-To: <4e4a11f8050221193659c59e54@mail.gmail.com>
References: <4e4a11f8050221193659c59e54@mail.gmail.com>
Message-ID: <4e4a11f805022121057765f806@mail.gmail.com>

> Before I try this myself, has anyone else already written any code to do this?

Yes, someone has.

http://www.prescod.net/pyximport/

I should have googled more thoroughly before posting. :-)

sw.


From das69 at et.byu.edu  Fri Feb  4 13:08:06 2005
From: das69 at et.byu.edu (Dan Smyth)
Date: Fri, 4 Feb 2005 11:08:06 -0700
Subject: (no subject)
Message-ID: <006801c50ae4$7a1fc1d0$6671080a@et.byu.edu>

Hey,

I'm trying to compile a version of Python on an SGI machine that is running IRIX 6.5.  When I run the configure option for version 2.4 I get this error:

configure: WARNING: stropts.h: present but cannot be compiled
configure: WARNING: stropts.h:     check for missing prerequisite headers?
configure: WARNING: stropts.h: see the Autoconf documentation
configure: WARNING: stropts.h:     section "Present But Cannot Be Compiled"
configure: WARNING: stropts.h: proceeding with the preprocessor's result
configure: WARNING: stropts.h: in the future, the compiler will take precedence
configure: WARNING:     ## --------------------------------- ##
configure: WARNING:     ## Report this to the python lists.  ##
configure: WARNING:     ## --------------------------------- ##

and when I run the configure option for version 2.3.4 I get this same error plus this additional one:

configure: WARNING: stropts.h: present but cannot be compiled
configure: WARNING: stropts.h: check for missing prerequisite headers?
configure: WARNING: stropts.h: proceeding with the preprocessor's result
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to bug-autoconf at gnu.org. ##
configure: WARNING:     ## ------------------------------------ ##

Do you know what is happening here?  Thanks.

Dan Smyth
Brigham Young University

Dan Gaidin -- Tai Shar Phoenix
"Dovie'andi se tovya sagain"
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From shoot at the.moon  Wed Feb  9 18:18:54 2005
From: shoot at the.moon (Steve Horsley)
Date: Wed, 09 Feb 2005 23:18:54 +0000
Subject: check socket alive
In-Reply-To: <1107827319.700424.180790@f14g2000cwb.googlegroups.com>
References: <1107827319.700424.180790@f14g2000cwb.googlegroups.com>
Message-ID: <cue5nu$vhn$1@news.freedom2surf.net>

martinnitram at excite.com wrote:
> Dear all,
>    following are some piece of my code (mainly create a socket
> connection to server and loop to receive data):
<snip> 
>    # function to receive data
>    def recv_for_sock(sock):
>      sock.settimeout(25)
>      while 1:
>        if sock is None:
>          return 1
>        try:
>          recv_data = sock.recv(65535)
>          if recv_data:
>            .... # do something
>        except socket.timeout:
>          print "Socket Timeout"
>          time.sleep (10)
>          pass
>        except socket.error:
>          print "Socket Error"
>          time.sleep (10)
>          pass
> 
<snip> 
>   my question is, when the socket (create a main function) is
> disconnected by server (netstat status show close_wait), in
> "recv_for_sock" function, it can catch the timeout exception at first
> time. After then, the program will looping/hang within the
> "recv_for_sock" function (actually is the socket.recv function) and
> causing CPU usage to 99%. So, how to detect the socket connection is
> closed at this case? I tried to use exception/check socket is None but
> no help.
>     Thank for helping.
> 

There is no point in continuing round the loop once you have caught an
exception. I suggest two possibilities:

1) put a return statement in the catch blocks, and return an ppropriate
value that indicates an error.

Or better:

2) Don't catch the exception at this level (because this method doesn't
know how to deal with the situation properly). Instead, let the exception
bubble up the call stack, and catch and deal with the exception wherever
you ARE able to sensiby able to decide what on earth to do if the receive
goes wrong.

Steve


From cbudnick at gmail.com  Wed Feb 16 20:56:31 2005
From: cbudnick at gmail.com (Christopher)
Date: 16 Feb 2005 17:56:31 -0800
Subject: make_obcallback(): could not import mod_python.apache
Message-ID: <1108605391.072274.117170@g14g2000cwa.googlegroups.com>

I am running:

Fedora Core 1
Python 2.4
Apache 1.3.3
mod_python 2.7.11

When I try to access the test mptest.py file I receive:

> Internal Server Error

When starting apache in my error_log I find:

> [Wed Feb 16 20:41:44 2005] [warn] Loaded DSO libexec/mod_python.so
uses plain Apache 1.3 API, this module might crash under $

and

> make_obcallback(): could not import mod_python.apache.
> make_obcallback(): could not call init.
> [Wed Feb 16 20:43:31 2005] [error] [client x.x.x.x] python_handler:
make_obcallback returned no obCallBack!

from when I attempt access that file.

If I attempt to run Python on the command line and then import
mod_python I receive:

ImportError: No module named mod_apache.apache
>>> import mod_python.apache
Traceback (most recent call last):
 File "<stdin>", line 1, in ?
 File "/usr/local/lib/python2.4/site-packages/mod_python/apache.py",
line 55, in ?
   import _apache
ImportError: No module named _apache

Any guidance would be greatly appreciated.

Christopher



From frnknstn at iafrica.com  Thu Feb 10 07:23:58 2005
From: frnknstn at iafrica.com (frnknstn at iafrica.com)
Date: Thu, 10 Feb 2005 07:23:58 SAST
Subject: A 'Python like' language
Message-ID: <20050210072401.CA1F12E603@jellyfish.mweb.co.za>

> Well I considered writing a pep to move all that stuff to a module
> called __icky__, you know:
> 
> from __icky__ import *

I think that should be:

from __icky__ import import_asterisk
import_asterisk __icky__



Frnknstn

---------------------------------------------
This message was sent using MWEB Airmail.
JUST LIKE THAT
http://airmail.mweb.co.za/




From ashot at removemolsoftthis.com  Fri Feb  4 17:29:21 2005
From: ashot at removemolsoftthis.com (Ashot)
Date: Fri, 04 Feb 2005 16:29:21 -0600
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot><1107487113.732375.110850@c13g2000cwb.googlegroups.com><opslnmywarej1m1c@ashot><mailman.1865.1107491434.22381.python-list@python.org><opsln54fpwej1m1c@ashot>
	<36hculF51ho2sU1@individual.net><1107530489.308497.103530@g14g2000cwa.googlegroups.com><36hrjpF4ui8fbU1@individual.net>
	<mailman.1911.1107546744.22381.python-list@python.org>
	<36i84qF52ce29U1@individual.net>
Message-ID: <opslo127s7ej1m1c@ashot>

this is what it looks like:

http://www.freshraisins.com/sand/ipythonscreen.PNG

does cygwin have a readline utility in it?  Perhaps this is overriding the  
correct one?  Thats the only thing I can think of.

.a

On Fri, 4 Feb 2005 22:35:45 -0000, Claudio Grondi  
<claudio.grondi at freenet.de> wrote:

> I have installed version 1.8. It makes is even worse,
> because now also "In [1]:" gets black background
> and is unreadable (it had a grey background before).
> Re-installing 1.7 makes the background again
> gray. I use German Windows 2000 SP 4 as OS.
>
> Claudio
> P.S. In quote marks the parts with black background:
> "In [1]:" sdlfjf
> "---------------------------------------------------------------------------
> "
> "exceptions.NameError"                                 Traceback (most
> recent call last)
>
>
> "Fernando Perez" <fperez.net at gmail.com> schrieb im Newsbeitrag
> news:mailman.1911.1107546744.22381.python-list at python.org...
>> Claudio Grondi wrote:
>>
>> > I use this one,
>> >
> http://heanet.dl.sourceforge.net/sourceforge/uncpythontools/readline-1.7.win
>> > 32.exe
>> > which I assume is the right one.
>>
>> Try version 1.8, some coloring problems have been recently fixed.  If  
>> that
>> doesn't do it, let me know and I'll try to get in touch with the author  
>> to
> see
>> if he can help.
>>
>> Cheers,
>>
>> f
>>
>
>



-- 
==============================
Ashot Petrosian
University of Texas at Austin, Computer Sciences
(views expressed are solely my own)
==============================


From mad.mick at gmx.de  Fri Feb  4 21:20:54 2005
From: mad.mick at gmx.de (Mick Krippendorf)
Date: Sat, 5 Feb 2005 03:20:54 +0100
Subject: returning True, False or None
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com> <raRMd.9382$s16.4267@trndny02>
	<mailman.1922.1107553495.22381.python-list@python.org>
Message-ID: <36ioe7F545p0pU1@individual.net>

Daniel Bickett wrote:
> 
> >>> def boolhunt( items ):
> ...     falseExists = False
> ...     for item in items:
> ...         if item is True:
> ...             return True
> ...         elif item is False and not falseExists:
> ...             falseExists = True
> ...     if falseExists:
> ...         return False



Or even shorter:

 >>> def boolhunt(items):
 ...    result = None
 ...    for item in items:
 ...        if item:
 ...            return True
 ...        elif result is None and item is False:
 ...            result = False
 ...    return result 


Or like the Melmacians would do it:

 >>> def boolgen(items):
 ...     result = None
 ...     for item in items:
 ...         if result:
 ...             raise StopIteration
 ...         elif item is not None:
 ...             result = item
 ...         yield result

 >>> [item for item in boolgen(a_list)][-1]


Mick.


From sjmachin at lexicon.net  Fri Feb 18 15:49:41 2005
From: sjmachin at lexicon.net (John Machin)
Date: 18 Feb 2005 12:49:41 -0800
Subject: re.compile and very specific searches
In-Reply-To: <cv5chc$k27$01$1@news.t-online.com>
References: <cv5ba4$nvn$1@solaris.cc.vt.edu>
	<cv5chc$k27$01$1@news.t-online.com>
Message-ID: <1108759781.084277.64990@f14g2000cwb.googlegroups.com>


Diez B. Roggisch wrote:
>
> You could use another regular expressin, e.g. like this:
>
>
> rex = re.compile(r"^((\d)|(1\d{1,2})|(2[0-5]\d))$")

This approach would actually work without the need for subsequent
validation, if implemented properly. Not only as you noted does it let
"259" through, but also it doesn't cover 2-digit numbers starting with
2. Assuming excess leading zeroes are illegal, the components required
are:

\d
[1-9]\d
1\d\d
2[0-4]\d
25[0-5]

>
> This is of course only for one number. Extend it accordingly to the
ip4
> address format.
>



From cam.ac.uk at mh391.invalid  Mon Feb 14 04:47:30 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Mon, 14 Feb 2005 09:47:30 +0000
Subject: For American numbers
In-Reply-To: <37b8dfF5anl9bU1@individual.net>
References: <420e7376$1@nntp0.pdx.net>	<gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>	<420fb4e6$0$16575$9b622d9e@news.freenet.de>	<ZcKdnWy9_fFamI3fRVn-iA@powergate.ca>
	<mailman.2509.1108352149.22381.python-list@python.org>
	<37b8dfF5anl9bU1@individual.net>
Message-ID: <cups3k$kbs$2@gemini.csx.cam.ac.uk>

Peter Maas wrote:
> This kibi-mebi thing will probably fail because very few can manage
> to say "kibibyte" with a straight face :)

I agree, I can't do it yet. I can write kiB and MiB though with a
straight face, and find that useful.
-- 
Michael Hoffman


From rupole at hotmail.com  Tue Feb 15 07:32:07 2005
From: rupole at hotmail.com (Roger Upole)
Date: Tue, 15 Feb 2005 07:32:07 -0500
Subject: win32gui bug: where to report it?
References: <cusofn$f0n$1$8302bc10@news.demon.co.uk>
Message-ID: <4211ecb6_1@127.0.0.1>

Win32all is called Pywin32 now, and resides on SourceForge:
http://sourceforge.net/projects/pywin32/

        Roger


"George van den Driessche" <no-one at nowhere.com> wrote in message 
news:cusofn$f0n$1$8302bc10 at news.demon.co.uk...
> It's taken me ages to find out why my window, built out of win32all, 
> wasn't
> receiving any messages. Eventually I found the answer here:
>
> http://mail.python.org/pipermail/python-list/2001-October/069451.html
>
> The important point being:
>> IIRC you have to pass the return value of the RegisterClass() call (which
>> is an atom) to the CreateWindowEx() function as the second parameter
>> (lpClassName).
> ... in other words, you can pass the name of your window class as the 
> second
> parameter, but it will silently fail to work. (This holds for CreateWindow
> too.)
>
> This is a bug for which it is pretty much impossible to work out the
> workaround without being told it, so I'd like to put the workaround in a
> more easily-found place. But where? win32all doesn't seem to have much
> documentation, much less a bug database.
>
> In case anyone else needs to find this message by searching, some keywords
> are: win32all, win32gui, WNDCLASS, RegisterClass, CreateWindow,
> CreateWindowEx
>
> George
>
> 




----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! >100,000 Newsgroups
---= East/West-Coast Server Farms - Total Privacy via Encryption =---


From francis.girard at free.fr  Sun Feb  6 15:58:08 2005
From: francis.girard at free.fr (Francis Girard)
Date: Sun, 6 Feb 2005 21:58:08 +0100
Subject: returning True, False or None
In-Reply-To: <CN-dndOnZabPSp7fRVn-2w@comcast.com>
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
	<mailman.1914.1107547292.22381.python-list@python.org>
	<CN-dndOnZabPSp7fRVn-2w@comcast.com>
Message-ID: <200502062158.08562.francis.girard@free.fr>

I think it is evil to do something "at your own risk" ; I will certainly not 
embark some roller coaster at my own risk.

I also think it is evil to scan the whole list (as "max" ought to do) when 
only scanning the first few elements would suffice most of the time.

Regards

Francis Girard

Le vendredi 4 F?vrier 2005 21:13, Steven Bethard a ?crit?:
> Fredrik Lundh wrote:
> > Steven Bethard wrote:
> >> Raymond Hettinger wrote:
> >>> return max(lst)
> >>
> >> Very clever!  Thanks!
> >
> > too clever.  boolean > None isn't guaranteed by the language
> > specification:
>
> Yup.  I thought about mentioning that for anyone who wasn't involved in
> the previous thread discussing this behavior, but I was too lazy.  ;)
> Thanks for pointing it out again.
>
> This implementation detail was added in Python 2.1a1, with the following
> note[1]:
>
> "The outcome of comparing non-numeric objects of different types is
> not defined by the language, other than that it's arbitrary but
> consistent (see the Reference Manual).  An implementation detail changed
> in 2.1a1 such that None now compares less than any other object.  Code
> relying on this new behavior (like code that relied on the previous
> behavior) does so at its own risk."
>
> Steve
>
> [1] http://www.python.org/2.1/NEWS.txt



From cam.ac.uk at mh391.invalid  Sun Feb 27 17:45:36 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sun, 27 Feb 2005 22:45:36 +0000
Subject: xhtml-print parser
In-Reply-To: <mailman.3060.1109352514.22381.python-list@python.org>
References: <1109333074.548547.171090@f14g2000cwb.googlegroups.com>	<cvn6f6$pdv$1@gemini.csx.cam.ac.uk>	<mailman.3045.1109339038.22381.python-list@python.org>	<cvncj2$9rb$1@gemini.csx.cam.ac.uk>
	<mailman.3060.1109352514.22381.python-list@python.org>
Message-ID: <cvtiip$ln0$1@gemini.csx.cam.ac.uk>

Steve Holden wrote:

> I have no problem with that. Indeed I am often surprised that questions 
> that I regard as too incoherent to be understood are frequently not only 
> understood but also answered with patience and fortitude.

I am too.

> 
> Given that you couldn't spare the time to try to intuit the purpose of 
> the question, I was surprised you took the time to complain about its 
> incoherence. It's usually (IMHO) much more productive to ignore c.l.py 
> questions I don't have time for, and it's certainly more polite.

I usually ignore the questions I find incoherent myself, and like you I
am surprised when they can be answered. But the ones that I can't
imagine being answered by those with even the greatest intuition and
patience? I figure some response is better than none, and that's what
this question would have gotten otherwise.

> If more of us had ignored Iliardis Lazarus, or whatever his name was, 
> he'd have gone away a lot quicker :-)

I only responded a couple of times before I killfiled the thread, which
is what I should have done to start with. But I don't think it should
have passed without comment (not necessarily from me).
-- 
Michael Hoffman


From fredrik at pythonware.com  Fri Feb 11 14:00:40 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 11 Feb 2005 20:00:40 +0100
Subject: is there a safe marshaler?
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl><420b9135$0$28982$e4fe514c@news.xs4all.nl><3b091a1c.0502110634.5edb1987@posting.google.com><mailman.2405.1108144870.22381.python-list@python.org>
	<cuit7n$jje$1@panix3.panix.com>
Message-ID: <cuiv8k$j3r$1@sea.gmane.org>

Aahz wrote:

>>It's not clear to me that if marshal is unsafe how XML could be safe.  In
>>this context they are both just serializations of basic Python data
>>structures.
>
> The difference is that parsing XML -- even badly malformed -- won't
> crash Python.

optimist.

>>> import os
>>> os.path.getsize("BL.xml")
1302
>>> from xml.dom import minidom
>>> x = minidom.parse("BL.xml")

(have patience.  have lots of patience.)

</F>





From aahz at pythoncraft.com  Mon Feb 14 19:57:24 2005
From: aahz at pythoncraft.com (Aahz)
Date: 14 Feb 2005 19:57:24 -0500
Subject: Kill GIL
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<86y8dqixo6.fsf@guru.mired.org> <cur9q3$or$1@panix3.panix.com>
	<donn-98901F.16083114022005@gnus01.u.washington.edu>
Message-ID: <curhdk$6hb$1@panix2.panix.com>

In article <donn-98901F.16083114022005 at gnus01.u.washington.edu>,
Donn Cave  <donn at u.washington.edu> wrote:
>In article <cur9q3$or$1 at panix3.panix.com>, aahz at pythoncraft.com (Aahz) 
>wrote:
>>
>> Yes.  I just get a bit irritated with some of the standard lines that
>> people use.
>
>Hey, stop me if you've heard this one:  "I used threads to solve
>my problem - and now I have two problems!"

Point to you.  ;-)
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From jeff at ccvcorp.com  Thu Feb 17 12:41:43 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Thu, 17 Feb 2005 09:41:43 -0800
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <4214A543.2000006@swiftdsl.com.au>
References: <37hippF4gcimiU1@individual.net><qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com><37hqlrF59l2b2U1@individual.net><873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>	<421450CC.9080504@swiftdsl.com.au>
	<mailman.2744.1108629122.22381.python-list@python.org>
	<4214A543.2000006@swiftdsl.com.au>
Message-ID: <1119loiqgsn4392@corp.supernews.com>

news.sydney.pipenetworks.com wrote:

> Fredrik Lundh wrote:
> 
>> a certain "princess bride" quote would fit here, I think.
> 
> I'm not really familiar with it, can you enlighten please.

(Taking a guess at which quote /F had in mind...)


Vezzini:  "Inconceivable!"
Inigo:    "You keep using that word.  I do not think that it means 
what you think it means."

Jeff Shannon



From eppstein at ics.uci.edu  Fri Feb 18 21:39:44 2005
From: eppstein at ics.uci.edu (David Eppstein)
Date: Fri, 18 Feb 2005 18:39:44 -0800
Subject: exercise: partition a list by equivalence
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<mailman.2803.1108743668.22381.python-list@python.org>
	<1108768870.455974.244590@c13g2000cwb.googlegroups.com>
Message-ID: <eppstein-8851A4.18394418022005@news.service.uci.edu>

In article <1108768870.455974.244590 at c13g2000cwb.googlegroups.com>,
 "John Machin" <sjmachin at lexicon.net> wrote:

> You don't need to think. This problem has been extensively picked over
> by folk who are a lot smarter than us, starting from 30 years ago.
> Google for "disjoint set" and "union-find". One gets the impression
> that the best possible algorithm would be slightly *worse* than O(n).

It can be solved by union-find
(e.g. with UnionFind from <http://www.ics.uci.edu/~eppstein/PADS/>):

import UnionFind
import sets

def merge(pairs):
    uf = UnionFind.UnionFind()
    items = sets.Set()
    for a,b in pairs:
        uf.union(a,b)
        items.add(a)
        items.add(b)
    leaders = {}
    for a in items:
        leaders.setdefault(uf[a],sets.Set()).add(a)
    return [list(component) for component in leaders.values()]

If you do all the unions before all the finds, as in this algorithm, 
union-find is O(n).

However it might be easier to treat the input pairs as the edges of a 
graph and apply a depth-first-search based graph connected components 
algorithm.

-- 
David Eppstein
Computer Science Dept., Univ. of California, Irvine
http://www.ics.uci.edu/~eppstein/


From jeff at ccvcorp.com  Mon Feb 14 20:21:49 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Mon, 14 Feb 2005 17:21:49 -0800
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <1108408527.104275.46780@l41g2000cwc.googlegroups.com>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<4210a434$0$23451$626a14ce@news.free.fr>
	<mailman.2539.1108397140.22381.python-list@python.org>
	<37c1cgF35vfuvU1@individual.net>
	<1108405269.472669.172070@o13g2000cwo.googlegroups.com>
	<5tSR28oZUPECFwnQ@objmedia.demon.co.uk>
	<1108408527.104275.46780@l41g2000cwc.googlegroups.com>
Message-ID: <1112jj4jvj3ch47@corp.supernews.com>

Pat wrote:

> I think the same applies to developers.  Not every programmer is
> willing to go through a lot of pain and effort just to get something
> simple to work.  

True... but given I.L.'s insistence on a rather stringent set of 
requirements (fully open-source toolchain to produce closed-source 
software on proprietary OS), and his attitude ("Why haven't all of you 
done this for me already? WHY WHY WHY?"), he comes across as someone 
who's *insisting* that *someone else* should go to a lot of pain and 
effort on *his* behalf.  Indeed, he's insisting that the Python 
community should provide volunteer effort because it will (supposedly) 
assist him in his commercial endeavor.

Notably, when you've commented in a reasonable manner about having 
apparently similar needs, several people have offered suggestions as 
to how to solve your problems.  People have also offered I.L. 
suggestions, but he derides them as not being exactly what he wants 
and continues to insist that others should perform volunteer work for 
his benefit.

Now, there's nothing wrong with asking (politely) why certain things 
are the way they are, or suggesting that it'd be nice if someone 
changed a few things.  But the insistence that he's being horribly 
wronged because people aren't jumping at the chance to assist him is 
more than a little bit offensive -- especially when he's turning up 
his nose at solutions that are close (but not exact) matches to his 
"requirements".  Instead of saying "Hey, someone's done half my work 
for me -- great!", he's saying "Hey, why haven't you done the rest of 
my work!"

Jeff Shannon
Technician/Programmer
Credit International




From jpb at ApesSeekingKnowledge.net  Thu Feb  3 08:31:53 2005
From: jpb at ApesSeekingKnowledge.net (Joe Block)
Date: Thu, 03 Feb 2005 13:31:53 GMT
Subject: Reinstall python 2.3 on OSX 10.3.5?
References: <mailman.1792.1107403740.22381.python-list@python.org>
	<ctsl83$s1q$1@news1.ucsd.edu>
	<just-077D54.12422603022005@news1.news.xs4all.nl>
Message-ID: <jpb-6F6CED.08315003022005@news-server2.tampabay.rr.com>

In article <just-077D54.12422603022005 at news1.news.xs4all.nl>,
 Just <just at xs4all.nl> wrote:

> In article <ctsl83$s1q$1 at news1.ucsd.edu>, Robert Kern <rkern at ucsd.edu> 
> wrote:
> 
> > Christian Dieterich wrote:
> > > On D? C?adaoin, Feabh 2, 2005, at 17:48 America/Chicago, 
> > > moa at extrapolation.com wrote:
> > > 
> > >> Hi there
> > >>
> > >> I started a very long and roundabout process of attempting to install
> > >> python 2.3.4 along side my apple-installed 2.3 system. To make a long
> > >> story short, I have completely confabulated my environment ( i deleted
> > >> the 2.3 binaries and so forth from the system in an attempt to start
> > >> things fresh), and now I cannot figure out how to reinstall the base
> > >> 2.3 Apple python distribution.
> > >> Can somebody please point me in the right direction?
> > > 
> > > 
> > > You could use
> > > fink install python
> > > which makes you a Python installation under /sw.
> > 
> > But that doesn't solve his problem, which is to restore the 
> > Apple-supplied Python that he deleted.
> 
> Also: fink is evil. I wouldn't touch it with a ten-foot pole.

I'm curious, why do you not like fink? It's certainly easier than 
compiling things by hand.


From a at a.invalid  Wed Feb  9 16:58:21 2005
From: a at a.invalid (Timo Virkkala)
Date: Wed, 09 Feb 2005 21:58:21 GMT
Subject: Python and version control
In-Reply-To: <XNrOd.1657$Mw3.72@amstwist00>
References: <XNrOd.1657$Mw3.72@amstwist00>
Message-ID: <1IvOd.537$Sx6.28@read3.inet.fi>

Carl wrote:
> What is the ultimate version control tool for Python if you are working in a
> Windows environment? 

I would very much recommend Subversion. It's in no way specific to either 
Windows or Python, but it's a wonderful tool. If you've ever used CVS, you'll 
feel right at home. Or after 10 minutes of learning the commands, that is.

And as someone already suggested, TortoiseSVN is a great front-end for SVN. It 
integrates with the Windows shell very nicely.

http://subversion.tigris.org/
http://tortoisesvn.tigris.org/

--
Timo Virkkala


From maxm at mxm.dk  Tue Feb  1 04:39:31 2005
From: maxm at mxm.dk (Max M)
Date: Tue, 01 Feb 2005 10:39:31 +0100
Subject: find isset() php function equivalent in python
In-Reply-To: <c6u3d2-b0q.ln1@pluto.i.infosense.no>
References: <41ff435f$0$18835$8fcfb975@news.wanadoo.fr>
	<c6u3d2-b0q.ln1@pluto.i.infosense.no>
Message-ID: <41ff4e18$0$260$edfadb0f@dread12.news.tele.dk>

Ola Natvig wrote:
> Olivier Noblanc ATOUSOFT wrote:
> 
>> Hello
>>
>>
>> What is the equivalent function of php isset() in python
> 
> try:
>     if variable:
>         # isset
>         pass
> except NameError:
>     # not set
>     pass
>     

you could use:

 >>> 'variable' in vars()

But be aware that it is bad bad practice to do it like that.

If you need variables that you don't know that name of, you should put 
them in a dictionary. They are made for that exact purpose.

 >>> unkown_vars = {}
 >>> unkown_vars['variable'] = 42
 >>> 'variable' in unkown_vars
True


-- 

hilsen/regards Max M, Denmark

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


From peter at engcorp.com  Mon Feb 28 08:19:37 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 28 Feb 2005 08:19:37 -0500
Subject: Python - what is the fastest database ?
In-Reply-To: <mailman.3134.1109593203.22381.python-list@python.org>
References: <1109592623.116661.101880@g14g2000cwa.googlegroups.com>
	<mailman.3134.1109593203.22381.python-list@python.org>
Message-ID: <UKidnfNEBL36h77fRVn-2g@powergate.ca>

PA wrote:
> On Feb 28, 2005, at 13:10, martijn at gamecreators.nl wrote:
>> What type database do they use / software ?
> 
> Hmmm... they don't use a "database" in the traditional sense of the term.
> 
> http://www-db.stanford.edu/~backrub/google.html

Section "4.3 Crawling the Web" in that discusses the role Python
plays in Google, at least in the form it (Google) had when this
paper was written.

-Peter


From crystal1 at spamless.net  Fri Feb  4 11:20:46 2005
From: crystal1 at spamless.net (crystal1)
Date: Fri, 04 Feb 2005 09:20:46 -0700
Subject: Python CGI --> ASP Request
Message-ID: <cu07dq030l@enews3.newsguy.com>

This question may be simple, so please bear with me.

We have a mainly ASP VBScript website running on IIS. I've installed 
Python and created a CGI form which takes text input and produces a 
string of URLs. The CGI page works fine.

Currently, when submitting the form the user is redirected to the CGI 
file's embedded html page. I would like for the user to submit the form 
and be brought back to the originating VB/ASP page with the 
<%=Request("RESULT")%> tag filled in with the links generated in the CGI 
form.

This seems so simple, but I can't think of an alternative to a 
non-manual <form> submission in the CGI, or an ugly and slow redirect 
page...

TIA


From newstonne at web.de  Wed Feb  2 17:56:12 2005
From: newstonne at web.de (Roland Heiber)
Date: Wed, 02 Feb 2005 23:56:12 +0100
Subject: Generating .pyc/.pyo from a make file
In-Reply-To: <4308d2-0801.ln1@eskimo.tundraware.com>
References: <4308d2-0801.ln1@eskimo.tundraware.com>
Message-ID: <42015a85_1@news.arcor-ip.de>

Tim Daneliuk wrote:
> I use a makefile to create distribution tarballs of freestanding Python
> programs and their documentation.  I cannot seem to find the right
> command line option to just generate a pyc/pyo file from the program
> and then exit.  If I use 'python -OOOO -c"import myprog"' it creates
> the pyo file, but myprog starts up and keeps running.
> 
> IOW, I need a batch method for generating compiled python.  I know it
> exists, but I can't find it for some reason ...
> 
> TIA,
Hi,

take a look at http://docs.python.org/lib/module-compileall.html

HtH, Roland


From jepler at unpythonic.net  Tue Feb 15 20:47:27 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Tue, 15 Feb 2005 19:47:27 -0600
Subject: super not working in __del__  ?
In-Reply-To: <cuu0pu$t44$1@sea.gmane.org>
References: <cuu0pu$t44$1@sea.gmane.org>
Message-ID: <20050216014727.GB30409@unpythonic.net>

When a Python program exits, various steps of cleanup occur.  One of
them is that each entry in the __dict__ of each module is set to 'None'.
Imagine that your __del__ runs after this step of the cleanup.  The reference
to the module-level variable that names your class is no longer available

I looked around at the documentation and didn't immediately find where
this is documented.  The closest I saw was in the C API reference:
    void Py_Finalize(   )
        Undo all initializations made by Py_Initialize() and subsequent use of
        Python/C API functions, and destroy all sub-interpreters (see
        Py_NewInterpreter() below) that were created and not yet destroyed
        since the last call to Py_Initialize(). Ideally, this frees all memory
        allocated by the Python interpreter. This is a no-op when called for a
        second time (without calling Py_Initialize() again first). There is no
        return value; errors during finalization are ignored.

        This function is provided for a number of reasons. An embedding
        application might want to restart Python without having to restart the
        application itself. An application that has loaded the Python
        interpreter from a dynamically loadable library (or DLL) might want to
        free all memory allocated by Python before unloading the DLL. During a
        hunt for memory leaks in an application a developer might want to free
        all memory allocated by Python before exiting from the application.

*       Bugs and caveats: The destruction of modules and objects in modules is
*       done in random order; this may cause destructors (__del__() methods) to
*       fail when they depend on other objects (even functions) or modules.
        Dynamically loaded extension modules loaded by Python are not unloaded.
        Small amounts of memory allocated by the Python interpreter may not be
        freed (if you find a leak, please report it). Memory tied up in
        circular references between objects is not freed. Some memory allocated
        by extension modules may not be freed. Some extensions may not work
        properly if their initialization routine is called more than once; this
        can happen if an application calls Py_Initialize() and Py_Finalize()
        more than once. 
but this doesn't go into detail about exactly how modules are cleaned up.

If anybody knows if this is better-documented somewhere, please speak
up!

Jeff
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From michele.simionato at gmail.com  Fri Feb  4 00:44:55 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 3 Feb 2005 21:44:55 -0800
Subject: advice needed for simple python web app
In-Reply-To: <OqCdnWO5h9_ynp7fRVn-uA@rogers.com>
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
	<7xr7jxnddh.fsf@ruckus.brouhaha.com>
	<OqCdnWO5h9_ynp7fRVn-uA@rogers.com>
Message-ID: <1107495895.697731.183550@z14g2000cwz.googlegroups.com>

Dan Perl:
> The application is just something I'm playing with to learn a little
bit on
> web apps.  It uses an HTML form to send an email.  The form takes
inputs
> like the From:, To: and Subject: fields and a text field.

It is difficult to beat CGI + CGIHTTPServer for conceptual simplificity
and easy of use: however, Quixote comes close and it has a *much*
better support for forms. Here is an
example from the minidemo in the distribution, so you have an idea of
how the code looks
like:

> from quixote.publish import Publisher
> from quixote.directory import Directory

> class RootDirectory(Directory):

>    _q_exports = ['', 'hello']

>    def _q_index(self):
>        return '''<html>
>                    <body>Welcome to the Quixote demo.  Here is a
>                    <a href="hello">link</a>.
>                    </body>
>                  </html>
>                '''

>    def hello(self):
>        return '<html><body>Hello world!</body></html>'


> def create_publisher():
>    return Publisher(RootDirectory(),
>                     display_exceptions='plain')


> if __name__ == '__main__':
>    from quixote.server.simple_server import run
>    print 'creating demo listening on http://localhost:8080/'
>    run(create_publisher, host='localhost', port=8080)

The exported methods of your directory class corresponds to Web pages;
_q_index
returns the main page, hello an hello word page. This works out of the
box with
no configuration at all, you don't need to create a cgi-bin directory,
nothing.
It is trivial to replace simple_server with a more serious server
(twisted_server,
scgi_server, etc. )

Notice: this example works in Quixote 2.0 which is currently in alpha.
Don't let
the "alpha" scares you: that means that the documentation is still a
bit rough and
few things are not fully settled down, but the framework is very much
usable.


                  Michele Simionato



From benjamin.cordes at blawrc.de  Mon Feb 14 13:22:20 2005
From: benjamin.cordes at blawrc.de (benjamin.cordes at blawrc.de)
Date: 14 Feb 2005 10:22:20 -0800
Subject: nested lists as arrays
References: <b35e3308.0502140835.53d3d9b2@posting.google.com>
	<mailman.2545.1108401033.22381.python-list@python.org>
Message-ID: <1108405340.758305.309160@c13g2000cwb.googlegroups.com>

Allright. What difference in runtime and space would it make using
dictionaries instead?

Do you have a pointer for me concerning runtime of standard
manipulations in Pythons?

Thanks for the tip.



From anomousty at webwonders.org  Fri Feb 18 12:32:55 2005
From: anomousty at webwonders.org (m)
Date: Fri, 18 Feb 2005 11:32:55 -0600
Subject: Newbie CGI problem
In-Reply-To: <cv58qr$5n8$1@nntp.msstate.edu>
References: <mailman.2809.1108746657.22381.python-list@python.org>
	<cv58qr$5n8$1@nntp.msstate.edu>
Message-ID: <cv58sv$5n8$2@nntp.msstate.edu>

m wrote:

> 
> gives just one hi for me.

"
Content-type: text/html


hi
"
I get this


From moma at example.net  Sun Feb  6 10:08:18 2005
From: moma at example.net (moma)
Date: Sun, 06 Feb 2005 16:08:18 +0100
Subject: Python versus Perl ?
In-Reply-To: <36mmseF54e67mU1@individual.net>
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
	<36mmseF54e67mU1@individual.net>
Message-ID: <CpqNd.7447$Sl3.179029@news4.e.nsc.no>

Reinhold Birkenfeld wrote:
> surfunbear at yahoo.com wrote:
> 
>> I've read some posts on Perl versus Python and studied a bit of my
>>Python book.
>>
>> I'm a software engineer, familiar with C++ objected oriented
>>development, but have been using Perl because it is great for pattern
>>matching, text processing, and automated testing. Our company is really
>>fixated on risk managnemt and the only way I can do enough testing
>>without working overtime (which some people have ended up doing) is by
>>automating my testing. That's what got me started on Perl.
>>
>> I've read that many people prefer Python and that it is better than
>>Perl. However, I want to ask a few other questions.
> 
> 
> "Better than Perl" is a very general statement. In my personal opinion,
> this is true for every project being larger than one file of ~200 LOC.
> 
> 
>>1. Perl seems to have alot of packaged utilities available through
>>CPAN, the comprehensive perl network. These can aid in building
>>parsers, web development, perl DBI is heavily used. This seems to be a
>>very important benifit. I'm not sure that Python is as extenive at all
>>in that regard ?
> 
> 
> There are the Python Package Index (PyPI), the Vaults of Parnassus, and
> when you don't find a needed package there, just come and ask here;
> almost always a decent solution is found.
> 
> A thing similar to CPAN is being worked on by various people, though I
> don't know when it will become mature.
> 
> 
>>Perl also has excellent pattern matching compared to
>>sed, not sure about how Python measures up,
>> but this seems to make perl ideally suited to text processing.
> 
> 
> Python has regular expressions much like Perl. The only difference is
> that Perl carries syntactic support for them, while in Python regular
> expressions are ordinary objects with methods etc.
> 
> 
>>2. Python is apparantly better at object oriented. Perl has some kind
>>of name spacing, I have used that in a limited way. Does Perl use a
>>cheap and less than optimal Object oriented approach ?
>>That was what someone at work said, he advocates Python.
>>Is it likely that Perl will improve it's object oriented features
>>in the next few years ?
> 
> 
> There is the Perl 6 movement, but when you read some of the docs at
> http://dev.perl.org, you will come to the conclusion that
> 
> - Perl 6 lies at least 3-5 years in the future and
> - it will be a huge mess. Someone here once said "Perl 6 is the ultimate
> failure of Perl's philosophy". There may be split views about this...
> 
> 
>>3. Perl is installed on our system and alot of other systems.
>>You don't have to make sys admins go out of there way to make it
>>available. It's usualy allready there.
> 
> 
> Same goes with Python; it is installed per default on most modern
> Unices. Windows is a completely different chapter, however, Perl isn't
> more widespread there.
> 
> 
>>I also did a search of job
>>postings on a popular website. 108 jobs where listed that require
>>knowledge of Perl, only 17 listed required Python. Becomeing more
>>familiar with Perl might then be usefull for ones resume ?
> 
> 
> It doesn't harm, of course. Recent statistics about programmers'
> salaries indicate, however, that Python ranks top (I somehow lost the URL).
> 
> 
>>If Python is better than Perl, I'm curious how really significant
>>those advantages are ?
> 
> 
> Try to decide yourself. The Python tutorial and website are your friends.
> Reinhold


I like Ruby because it inherits so many (best) features from Python and 
Perl ;)  Someday all these languages will compile to a common 
intermediate representation (ref. YAML: http://yaml.kwiki.org  || 
http://yaml.org )

http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/79533

http://www.cs.washington.edu/homes/kd/courses/pythonruby.pdf

http://www.ntecs.de/old-hp/s-direktnet/rb/download_ruby.html

http://www.ruby-lang.org/en/


// moma


From roy at panix.com  Mon Feb 28 11:01:10 2005
From: roy at panix.com (Roy Smith)
Date: 28 Feb 2005 11:01:10 -0500
Subject: HELP: Python equivalent of UNIX command "touch"
References: <o2HUd.256$ac.161@read3.inet.fi>
Message-ID: <cvvf86$2en$1@panix2.panix.com>

pekka niiranen  <pekka.niiranen at wlanmail.com> wrote:
>Does anybody know Python recipe for changing the date
>of the directory or files in W2K to current date and time?
>In UNIX shell command "touch" does it.

You want os.utime()


From wenshengwang at gmail.com  Wed Feb  9 20:26:17 2005
From: wenshengwang at gmail.com (Wensheng)
Date: 9 Feb 2005 17:26:17 -0800
Subject: how can I replace a execfile with __import__ in class to use self
	variables
Message-ID: <1107998777.476599.7890@o13g2000cwo.googlegroups.com>

I have a py program below:
--------------------------------
class someclass:
	def __init__(self):
		self.var = "hell, world"

	def printitout(self):
		execfile("printit.py")
		#__import__("printit") #doesn't work

if __name__=="__main__":
	c = someclass()
	c.printitout()
-------------------------------------------

the file printit.py has only one line:
--------------
print self.var
--------------

executing someclass works, but I can't replace execfile with import.
what globals, locals should I use to make __import__() work in that
situation?

Thank you for any help.



From abuse at solumslekt.org  Thu Feb 17 12:02:59 2005
From: abuse at solumslekt.org (Leif B. Kristensen)
Date: Thu, 17 Feb 2005 18:02:59 +0100
Subject: Curses and Terminal DEC
Message-ID: <774Rd.9359$IW4.223549@news2.e.nsc.no>

I'm playing a little with curses (okay, call me a masochist) and have
found a small gotcha. When I do eg. a screen = stdscr.subwin(10,20,0,0)
and then a screen.border(), I end up with an ugly border where the
right side is seriously misaligned. 

I've figured out the reason: I love the Terminal DEC font in Linux, and
have set it as my preferred font in the KDE Konsole. When I switch to
the default font, everything looks dandy. But is there a way to get a
nice border with the Terminal DEC font?
-- 
Leif Biberg Kristensen



From danperl at rogers.com  Mon Feb  7 15:43:15 2005
From: danperl at rogers.com (Dan Perl)
Date: Mon, 7 Feb 2005 15:43:15 -0500
Subject: python code with indention
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
Message-ID: <dMKdnSk-aNR7T5rfRVn-3w@rogers.com>


"Xah Lee" <xah at xahlee.org> wrote in message 
news:1107805151.265680.165380 at o13g2000cwo.googlegroups.com...
> is it possible to write python code without any indentation?

I read just today in a tutorial that "Python on the other hand, does not 
even allow changes in code's indentation".  Maybe the author of that 
tutorial can help? 




From peter.havens at gmail.com  Sat Feb 19 11:41:58 2005
From: peter.havens at gmail.com (Pete Havens)
Date: 19 Feb 2005 08:41:58 -0800
Subject: [ANN] Python 2.4 Quick Reference available
In-Reply-To: <cv79sj$mgk$1@aphrodite.grec.isp.9tel.net>
References: <cv79sj$mgk$1@aphrodite.grec.isp.9tel.net>
Message-ID: <1108831318.290846.5930@z14g2000cwz.googlegroups.com>

The is awesome! Thanks. I did notice one thing while reading it. In the
"File Object" section, it states:

"Created with built-in functions open() [preferred] or its alias
file()."

...this seems to be the opposite of the Python documentation:

"The file() constructor is new in Python 2.2. The previous spelling,
open(), is retained for compatibility, and is an alias for file()."

...but I'm picking nits, because this is a fantastic piece of work and
will be very useful to me. Thanks again!



From steven.bethard at gmail.com  Wed Feb  9 15:16:40 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 09 Feb 2005 13:16:40 -0700
Subject: convert list of tuples into several lists
In-Reply-To: <36uihlF58p63iU1@individual.net>
References: <cud40u$vqb$01$1@news.t-online.com>
	<36uihlF58p63iU1@individual.net>
Message-ID: <_cWdnZN4wO418pffRVn-qA@comcast.com>

Diez B. Roggisch wrote:
> zip(*[(1,4),(2,5),(3,6)])

While this is also the approach I would use, it is worth noting that 
Guido thinks of this as an abuse of the argument passing machinery:

http://mail.python.org/pipermail/python-dev/2003-July/037346.html

Steve


From jfj at freemail.gr  Sun Feb  6 23:18:07 2005
From: jfj at freemail.gr (jfj)
Date: Sun, 06 Feb 2005 20:18:07 -0800
Subject: Confused with methods
In-Reply-To: <TL-dneoHycPA35vfRVn-qQ@rogers.com>
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<TL-dneoHycPA35vfRVn-qQ@rogers.com>
Message-ID: <4206EBFF.1060607@freemail.gr>

Dan Perl wrote:
> "jfj" <jfj at freemail.gr> wrote in message 
> news:mailman.2022.1107703890.22381.python-list at python.org...
>>
>>However this is not possible for another instance method:
>>
>>############
>>class A:
>> pass
>>
>>class B:
>> def foo(x,y)
>>     print x,y
>>
>>b=B()
>>A.foo = b.foo
>>a=A()
>>
>># error!!!
>>a.foo()
>>##############
>>
>>Python complains that 'foo() takes exactly 2 arguments (1 given)'.
>>But by calling "b.foo(1)" we prove that it is indeed a function which 
>>takes
>>exactly one argument.
>>
>>Isn't that inconsistent?
> 
> 
> You called b.foo(1) but a.foo().  Note one argument in the first call and no 
> arguments in the second call.  Would you have called a.foo(1), you would 
> have gotten the same result as with b.foo(1).  I suppose that was just a 
> small omission on your part, but what are you trying to do anyway?  It's a 
> very strange use of instance methods. 
> 
> 

No omission.
If I say:

x=b.foo
x(1)

Then, without looking at the previous code, one can say that "x" is a
function which takes one argument. Continuing with "x":

A.foo = x
# this is ok
A.foo(1)
a=A()
# this is not ok
a.foo()

I expected that when we add this "x" to a class's dictionary and
then we request it from an instance of that class, it will be
converted to an bound-method and receive its --one-- argument
from the referring instance.

So "a.foo()" == "A.foo(a)" == "x(a)" == "b.foo(a)" == "B.foo(b,a)",
or at least "why not?" (head exploded?:)

I'm not trying to do something specific with this though.


G.


From ncoghlan at iinet.net.au  Tue Feb  8 04:28:51 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Tue, 08 Feb 2005 19:28:51 +1000
Subject: variable declaration
In-Reply-To: <slrnd0esqn.26q.apardon@rcpc42.vub.ac.be>
References: <4202A022.3050209@netscape.net>	<MSGID_2=3A5025=2F3.131_4204b0a9@fidonet.org>	<mailman.1978.1107622451.22381.python-list@python.org>	<slrnd0epjg.26q.apardon@rcpc42.vub.ac.be>	<mailman.2069.1107783321.22381.python-list@python.org>
	<slrnd0esqn.26q.apardon@rcpc42.vub.ac.be>
Message-ID: <42088653.4090009@iinet.net.au>

Antoon Pardon wrote:ons already existing.
> The compilor might generate a RESTORE instruction.

Whether it is done as a LOAD/STORE or a RESTORE, it has to perform the same work 
- check the name exists in the local namespace, and throw an exception if it 
doesn't. If it the name does exist, perform a normal store operation.

>>but the optimiser should 
>>eventually be able to do something to eliminate the performance penalty due to 
>>the technically unnecessary LOAD. I doubt it will be able to beat a STORE_FAST 
>>when it comes to trying to get a performance improvement, though :)
> 
> 
> But maybe a RESTORE_FAST could.

STORE_FAST is set up to store a local as fast as is reasonably possible. The 
space for the local is preallocated in the fast locals C array. How is an 
instruction which does that *and something else* ever meant to be faster?

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From john at grulic.org.ar  Mon Feb  7 13:51:38 2005
From: john at grulic.org.ar (John Lenton)
Date: Mon, 7 Feb 2005 15:51:38 -0300
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <200502071907.12169.francis.girard@free.fr>
References: <dvOMd.33656$EG1.19314@lakeread04>
	<mailman.2034.1107725421.22381.python-list@python.org>
	<cu7532$er8$01$1@news.t-online.com>
	<200502071907.12169.francis.girard@free.fr>
Message-ID: <20050207185138.GA20602@grulic.org.ar>

On Mon, Feb 07, 2005 at 07:07:10PM +0100, Francis Girard wrote:
> Zut !
> 
> I'm very sorry that there is no good use case for the "reduce" function in 
> Python, like Peter Otten pretends. That's an otherwise very useful tool for 
> many use cases. At least on paper. 
> 
> Python documentation should say "There is no good use case for the reduce 
> function in Python and we don't know why we bother you offering it."

I am guessing you are joking, right? I think Peter exaggerates when he
says that "there will be no good use cases for reduce"; it is very
useful, in writing very compact code when it does exactly what you
want (and you have to go through hoops to do it otherwise). It also
can be the fastest way to do something. For example, the fastest way
to get the factorial of a (small enough) number in pure python is

  factorial = lambda n: reduce(operator.mul, range(1, n+1))

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
Laugh and the world thinks you're an idiot.
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From theller at python.net  Tue Feb  1 13:13:13 2005
From: theller at python.net (Thomas Heller)
Date: Tue, 01 Feb 2005 19:13:13 +0100
Subject: Where are list methods documented?
References: <41ffba7d$0$15879$a1866201@visi.com>
	<mailman.1703.1107279798.22381.python-list@python.org>
	<41ffc3c4$0$10772$a1866201@visi.com>
Message-ID: <r7k0f8sm.fsf@python.net>

Grant Edwards <grante at visi.com> writes:

> On 2005-02-01, Brian van den Broek <bvande at po-box.mcgill.ca> wrote:
>
>> I'm not positive I understand what you are looking for, but do these 
>> help?:
>>
>><http://www.python.org/doc/2.4/lib/built-in-funcs.html#l2h-15>
>><http://www.python.org/doc/2.4/lib/typesseq.html>
>><http://www.python.org/doc/2.4/lib/typesseq-mutable.html>
>
> Yes, that last page was the one I was looking for.  I didn't
> know enough to spell list as "mutable sequence type".
>
> -- 
> Grant Edwards                   grante             Yow!  I think my CAREER
>                                   at               is RUINED!!
>                                visi.com            

You could also have typed 'sort' in the box here:

http://starship.python.net/crew/theller/pyhelp.cgi

This search is also available in Mark Hammond's Mozilla Python sidebar.

Thomas


From BOOGIEMANPN at YAHOO.COM  Fri Feb 11 11:26:04 2005
From: BOOGIEMANPN at YAHOO.COM (BOOGIEMAN)
Date: Fri, 11 Feb 2005 17:26:04 +0100
Subject: Alternative to raw_input ?
Message-ID: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>

I need something like "Press any key to continue" code for my program.
Currently I use : raw_input("Press Enter to continue ") but it's lame.


From Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org  Mon Feb  7 15:43:11 2005
From: Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org (Alexander)
Date: Mon, 07 Feb 2005 23:43:11 +0300
Subject: variable declaration
References: <1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
Message-ID: <MSGID_2=3A5025=2F3.131_4207fd24@fidonet.org>

?????? Alex!

05 ??????? 2005 ? 17:00, Alex Martelli ? ????? ?????? ? All ?????:
 >>  AM> The fact that in Python there are ONLY statements, NO
 >>  AM> declarations,
 >> What is "global"? Statement? Ok, I fill lack of "var" statement:)
 AM> 'global' is an ugly wart,

Ok,
===
def hi():
  print "hello!"
===
What is it? Statement or declaration? After interpreter see this lines, it add
information about function "hi" and it's body to his memory. Look at this:
  var S
Interpreter see this line and add information about variable S to the memory. I
don't find big difference.
By the way keyword "def" is as bad as "var", from your point of view? :)

 AM> to all intents and purposes working "as if"
 AM> it was a declaration.  If I had to vote about the one worst formal
 AM> defect of Python, it would surely be 'global'.
Second worsest - 'def'? :)

 AM> What you keep demanding is a way to inject far worse ugliness, and in
 AM> a context in which the typical behavior of pointy-haired bosses will
 AM> be to make it unavoidable for many of the people who work with Python.
 AM> I am strongly convinced that, if you had your wish, the total amount
 AM> of happiness in the world would be quite substantially diminished, and
 AM> I will do anything I can to stop it from happening.

:) "Star Wars IX" :)
If your boss is rather smart, you can explain your position. Even if he is not
agree, he will give you freedom.
If your boss is stupid, find another one:)
Of course, if you will explain him in such a way "hey, boss, you will never
understand this language, go back to your playground", you have no chance:)

 AM> There IS no meaning to your (several) sentences above-quoted, that it
 AM> can help anybody to "try to undestand": it's simply an insanely bad
 AM> attempt at totally invalid parallels.
I understand your opinion. From my point of view, you don't even try to
understand.

 >>  AM> In brief: you're not just wrong, you're so totally, incredibly,
 >>  AM> utterly and irredeemably wrong that it's not even funny.
 >> Hey, take it easy! Relax, reread that piece of text. It was written
 >> with smile on my lips. Here it is for your convenience:
 AM> Do yourself a favor: don't even _try_ to be funny in a language you
 AM> have so much trouble with.  Your communication in English is badly
 AM> enough impaired even without such lame attempts at humor: don't made
 AM> bad things even worse -- the result is NOT funny, anyway, just totally
 AM> garbled.

But, I am friendly, even with my opponents. I think it is my good trait.

 AM> There IS no ``problem "in general"'': Python does a pretty good job
 AM> of
 AM> diagnosing as many errors as can be diagnosed ***without demanding
 AM> absurdities such as redundancy on the programmer's part***.  Period.

 >> again, the main idea:
 >> ========
 >> Or, maybe, we will ask interpreter to find and prevent as many
 >> errors as he can?

 AM> To show how absurd that would be: why not force every line of the
 AM> program to be written twice, then -- this would help diagnose typos,
 AM> because the interpreter could immediately mark as errors any case in
 AM> which the two copies aren't equal.  Heck, why stop at TWICE -- even
 AM> MORE errors will be caught if every line has to be written TEN times.
 AM> Or a million.  Why not?  *AS MANY ERRORS AS [it] CAN* is an
 AM> *ABSURD* objective, if you don't qualify it with *WHILE AVOIDING ANY
 AM> ENFORCED REDUNDANCY* introduced solely for that purpose.

Hmm. It's clever move. I can't resist here.
Well, I agree that keyword "var" is to long. Programs are not look pretty with
it, especialy in situations like this:
  for var x in xrange(10):...
But I still think declaration of variables is good idea. But with shorter
syntax. May be, smth like this: ~S, or `S or .S, or S`, S~ , S. , and so on. Of
course it must be optional feauture: use it if you want or don't use if you
don't want.


 >> You wrote about "substantial cost" of var declarations. Yes, you are
 >> write. But think about the cost of lack of var declarations. Compare
 >> time that programmer will waste on search for the reason of bug
 >> caused by such typo, plus time what programmer will waste while
 >> remembering exact variable name.
 AM> I've been programming essentially full-time in Python for about three
 AM> years, plus a few more years before then when I used Python as much
 AM> as
 AM> I could, even though my salary was mostly earned with C++, Visual
 AM> Basic, Java, perl, and so on.  My REAL LIFE EXPERIENCE programming in
 AM> Python temms me that the time I've "wasted on search" etc due to the
 AM> lack of variable declaration is ***FUNDAMENTALLY NOTHING AT ALL***.
 AM> Other hundreds of thousands of man-hours of similar Python programming
 AM> experience on the part of hundreds of other programmers essentially
 AM> confirm these findings.

 AM> Your, what, TENS?, of man-hours spent programming in Python tell you
 AM> otherwise.

Do you ever wrote programs for engineering calculations? Dozens of variables
with names like lambda_1, phi_k, epsilon, d2f_dx2, grad_z and so on. You wrote
it, start it and see that it work wrong. You start debugging. Look at every
line, and attentively compare written in the screen and in the paper: is it
correct? My experience say that often errors caused by typos in names of vars
(more precisely, writing one name instead of another).
You may say: give better names for your variables! Ha, I'am often don't
understand that they mean! They are written for me by an engineer! He is
thinking in that terms, they is natural for him. He and his collegues want to
see error messages as "lambda_1 must be between 2 and 75".
So I'am sure: any checking will help. If I'am sure that interpreter can't
create "epsElon" I will not check the left side of "=" operator. If I can't be
sure in it, I will check it. It will take time. That's all.
Recent years I'am not often work with engineering calculations, but I want to
use Python for them also - if they will be.

 AM> Fine, then *USE ANOTHER LANGUAGE* and be happy, and let US
 AM> be just as happy by continuing to use Python -- almost all languages
 AM> do things the way you want, so ***leave alone*** the few happy oases
 AM> such as Python and Ruby where programmers can happily avoid the
 AM> idiotic redundancy of variable declarations, and not even PHBs can
 AM> impose otherwise.

Bad boss will find a way to make your life worse:)  With, or without,
availibility of variable declarations.

 >> Compare it with time for looking on message:
 >> ===
 >> Traceback (most recent call last):
 >>   File "<pyshell#16>", line 5, in -toplevel-
 >>     epselon
 >> NameError: name 'epselon' is not defined, in strict mode
 >> ===
 >> and fixing it, plus time on typing three letters (or less).

 AM> Like experience shows in all cases of such idiotic redundancies, the
 AM> real waste of time comes in the BAZILLION cases where your program
 AM> WOULD be just fine -- except you missed one redundancy, so you have to
 AM> go and put it in to make the gods of redundancy happy again.  That
 AM> happens with VASTLY higher frequency than the cases where the enforced
 AM> redundancy saves you a comparable amount of time by catching some
 AM> error earlier.

 AM> Plus, the FALSE confidence coming from redundancy works against you by
 AM> kidding you into believing that a BAZILLION other typos can't still be
 AM> lurking in your code, just because you've eliminated one TINY subset
 AM> of such typos (typos in names of variables that happen to leave the
 AM> mangled names syntactically valid BUT different from any other
 AM> variable) -- and *ONLY* that tiny subset of such typos which happened
 AM> on the left of a plain '=' (since all others, happening on the RIGHT
 AM> of an '=' or on the left of an _augmented_ '=', were already caught),
 AM> and ONLY regarding barenames (such typos on any but the rightmost
 AM> component of compound names were already caught intrinsically, and
 AM> catching those on the rightmost component is trivially easier than
 AM> introducing a {YECCCCHH} 'vars' as you so stubbornly insist)...

 AM> Basically you're focusing on maybe ONE IN A MILLION of the errors you
 AM> could make and want to pervert the whole foundation of Python, and
 AM> seriously hamper the productivity of hundreds of thousands of Python
 AM> programmers in every normal case!, to save maybe two minutes in such a
 AM> one-in-a-million case.

 AM> I consider this one of the worst ideas to have been proposed on this
 AM> newsgroup over the years, which _IS_ saying something.  Oh, you're not
 AM> the only one, for sure -- there must have been a dozen before you, at
 AM> least.  Fortunately, even though almost each and every one of them has
 AM> wasted more of everybody's time with such ideas, than even their
 AM> scare-tactics claim of ``wastes of time'' due to lack of declarations
 AM> could account for, Python is still intact.  A few of the stubborn
 AM> lovers of declarations tried doing without, and, to their
 AM> astonishment, found out that everybody else, with years of Python
 AM> experience, was right, and they, without ANY such experience, were
 AM> wrong (just incredible, eh?!); others have gone away to find their
 AM> bliss in Perl, PHP, or whatever -- good riddance, and don't let the
 AM> door slam behind you as you go, please.

Don't be so ... I don't find the equivalent english word. Smth like: Take it
more easy.


Alexander, zatv at bk.ru


From unlearned at gmail.com  Tue Feb  8 09:36:50 2005
From: unlearned at gmail.com (Daniel Fackrell)
Date: Tue, 8 Feb 2005 07:36:50 -0700
Subject: [perl-python] text pattern matching, and expressiveness
References: <1107802850.999843.260520@c13g2000cwb.googlegroups.com>
	<Xns95F6917BFEEF4castleamber@130.133.1.4>
Message-ID: <cuaihe$vcu$1@sea.gmane.org>

"John Bokma" <postmaster at castleamber.com> wrote in message
news:Xns95F6917BFEEF4castleamber at 130.133.1.4...
> Xah Lee wrote:
>
> > Perl is a language of syntactical variegations. Python on the other
> > hand, does not even allow changes in code's indentation, but its
> > efficiency and power in expression, with respect to semantics (i.e.
> > algorithms), showcases Perl's poverty in specification.
>
> Clarify :-D.

Clarification:

He (XL) is a troll and admits it.  If only he would include that information
up-front in his (IMO worthless) [perl-python] posts, it would save a lot of
effort.

Daniel Fackrell





From aclarke11 at yahoo.co.uk  Sat Feb  5 07:36:12 2005
From: aclarke11 at yahoo.co.uk (Tony)
Date: 5 Feb 2005 04:36:12 -0800
Subject: "Collapsing" a list into a list of changes
References: <dvOMd.33656$EG1.19314@lakeread04>
Message-ID: <1107606972.861993.250330@f14g2000cwb.googlegroups.com>


Alan McIntyre wrote:
> Hi all,
>
> I have a list of items that has contiguous repetitions of values, but

> the number and location of the repetitions is not important, so I
just
> need to strip them out.  For example, if my original list is
> [0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5], I want to end up with
[0,1,2,3,2,4,5].
>
> Here is the way I'm doing this now:
>
> def straightforward_collapse(myList):
>      collapsed = [myList[0]]
>      for n in myList[1:]:
>          if n != collapsed[-1]:
>              collapsed.append(n)
>
>      return collapsed
>
> Is there an elegant way to do this, or should I just stick with the
code
> above?
>
> Thanks,
> Alan McIntyre
> http://www.esrgtech.com

Here is a version using dictionary properties, ie no duplication of
keys.

def condense(l):
 d={}
 for item in l:
    d[item]=1
 l=d.keys()
 return l

Cheers
Tony



From ods at strana.ru  Thu Feb 10 10:45:03 2005
From: ods at strana.ru (Denis S. Otkidach)
Date: Thu, 10 Feb 2005 18:45:03 +0300
Subject: sre is broken in SuSE 9.2
In-Reply-To: <cufu9t$j37$1@news.sap-ag.de>
References: <mailman.2299.1108029731.22381.python-list@python.org>
	<cufu9t$j37$1@news.sap-ag.de>
Message-ID: <20050210184503.5ffd2aa8.ods@strana.ru>

On Thu, 10 Feb 2005 16:23:09 +0100
Daniel Dittmar <daniel.dittmar at sap.corp> wrote:

> Denis S. Otkidach wrote:
> 
> > On all platfroms \w matches all unicode letters when used with flag
> > re.UNICODE, but this doesn't work on SuSE 9.2:
> 
> I think Python on SuSE 9.2 uses UCS4 for unicode strings (as does 
> RedHat), check sys.maxunicode.
> 
> This is not an explanation, but perhaps a hint where to look.

Yes, it uses UCS4.  But debian build with UCS4 works fine, so this is
not a problem.  Can --with-wctype-functions configure option be the
source of problem?

-- 
Denis S. Otkidach
http://www.python.ru/      [ru]


From tim.peters at gmail.com  Sat Feb  5 20:52:15 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Sat, 5 Feb 2005 20:52:15 -0500
Subject: Pickling and inheritance are making me hurt
In-Reply-To: <477dd2xhuk2.ln2@news.conpoint.com>
References: <477dd2xhuk2.ln2@news.conpoint.com>
Message-ID: <1f7befae050205175217d008a2@mail.gmail.com>

[Kirk Strauser]
> I have a module that defines a Search class and a SearchResult class.

Try posting a minimal self-contained code sample that fails.

> I use these classes by writing other modules that subclass both of them as
> needed to interface with particular search engines.
> 
> My problem is that Search defines a method (called automatically by __del__)
> to save its results between invocations:
>
>    def _saveresults(self):
>        self._oldresults = self._results
>        file = open(self._storefile(), 'w')
>        pickle.dump(self._oldresults, file)
>        file.close()
>
> The problem I'm having is the the pickle.dump call is failing whenever the
> objects in "self.data" are instances of derivatives of SearchResult rather
> than instances of SearchResult itself (which is pretty much always the
> case):
>
>    Exception pickle.PicklingError: <pickle.PicklingError instance at
> 0xb7f7ad6c> in <bound method Search.__del__ of <__main__.Search object at
> 0xb7ec954c>> ignored
> 
> Now, if I overload _saveresults inside a subclass of Search, then it works.
> It seems like the problem is that _saveresults is only looking inside the
> same namespace as Search (where it's originally defined), even if it's
> actually been inherited by another class in a different module.  Is there a
> way around this?

Not enough relevant information to say.  __del__ looks irrelevant
here, apart from that you happen to be pickling while __del__ is
executing.  Try pickling an instance of a subclass of Search directly
to see what happens.  There are many reasons for why PicklingError may
get raised.

It's certainly true that any function in Python (method or not)
executes with the globals of the module in which it's defined.  While
you mentioned that as a possible issue, it seemed to come out of the
blue (didn't seem to follow from anything said before it).


From phleum_nospam at chello.se  Wed Feb  9 12:33:31 2005
From: phleum_nospam at chello.se (Carl)
Date: Wed, 09 Feb 2005 18:33:31 +0100
Subject: Python and version control
Message-ID: <XNrOd.1657$Mw3.72@amstwist00>

Dear friends,

What is the ultimate version control tool for Python if you are working in a
Windows environment? 

When you work on a Visual C++ project then it's easy, use Visual Source Safe
for your source code! But when it comes to large Python projects and no
universal Python IDE with version control integration is available,
checking in and out files is not as simple. I am a keen user of Emacs, but
version control, which is very simple when you are in a Linux environment,
for example, is not a straightforward in Windows.

What is the most common adopted approach among Python developers working in
a Windows environment? 

Carl



From jerf at jerf.org  Fri Feb 11 06:44:00 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 11 Feb 2005 06:44:00 -0500
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<4207c8db$0$21623$a1866201@visi.com>
	<cub12p$pke$1@achot.icm.edu.pl>
	<36sip2F56jjmaU1@individual.net> <umzubw8xg.fsf@vh-s.de>
Message-ID: <pan.2005.02.11.11.43.56.884015@jerf.org>

On Fri, 11 Feb 2005 13:57:47 +0100, Josef Dalcolmo wrote:
> You can distribute GPL'ed code in binary form, you just have to make the
> sources available as well.  And, yes I would use this as a test: if your
> program needs gpl-ed code for some of it's functionality, you have to
> licence your program according to the GPL - unless you distribute the
> GPL'ed parts separately and your program is still basically functioning
> without the GPL'ed code.

The problem with this is what I've called the "patch hole" in another
context [1]. The problem with this definition is that I can *always*
distribute GPL'ed parts separately and re-combine them arbitrarily upon
execution, and it's not even particularly hard. Write your code with the
GPL'ed code embedded. At the end, before you distribute, extract it and
record the extraction so your program can "rewind it"; you're left with
nothing in your code that is GPLed. Later, the user will go get the GPL
software, and you software "rewinds" the extraction process, and the user
is left with something that is byte-for-byte identical to what you weren't
allowed to distribute by the GPL.... so what good was the GPL?

(Compiling issues can of course be extracted away, which is what a linker
does.)

If this is all the protection that the GPL provides, than it is utterly
useless. But truly nailing down what it means is even harder.

Nobody really knows what the GPL means when it gets down to it; the entire
copyright-based model is broken and unrepairable in a software context.
It's like nailing jello to a wall, you just can't hold it up there.

[1]:http://www.jerf.org/writings/communicationEthics/node10.html#SECTION000105000000000000000


From cam.ac.uk at mh391.invalid  Sun Feb 13 21:26:29 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Mon, 14 Feb 2005 02:26:29 +0000
Subject: Alternative to raw_input ?
In-Reply-To: <mailman.2486.1108315169.22381.python-list@python.org>
References: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>	<w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>	<cuio9f$13k8$1@ns.felk.cvut.cz>
	<mailman.2486.1108315169.22381.python-list@python.org>
Message-ID: <cup28p$svu$2@gemini.csx.cam.ac.uk>

Francis Girard wrote:
> [den]:
> 
>>import msvcrt
>>msvcrt.getch()
> 
> I frequently had the problem to have something similar but *portable*.
> Something as short and simple.

This has been brought up many times on this newsgroup. The answer is that
there is no simple way to do this portably. You could use Python's
exception handling to create a version that runs on multiple systems
though, falling back to another method if msvcrt can't be imported.
-- 
Michael Hoffman


From deetsNOSPAM at web.de  Thu Feb  3 15:30:15 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Thu, 03 Feb 2005 21:30:15 +0100
Subject: Calling a method using an argument
References: <ctth3v$o2r$1@ucsnew1.ncl.ac.uk> <36evn2F51nullU1@individual.net>
	<36f02uF51nullU2@individual.net>
	<Xns95F2A4C62E57Cduncanrcpcouk@127.0.0.1>
Message-ID: <ctu1km$v79$00$1@news.t-online.com>

> 
> def test(self, method, *args):
>     return getattr(self, method)(*args)

Yup, forgot abount that.

-- 
Regards,

Diez B. Roggisch


From steven.bethard at gmail.com  Tue Feb 22 14:45:18 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 22 Feb 2005 12:45:18 -0700
Subject: Problem with the sort() function
In-Reply-To: <421b4e54@nntp0.pdx.net>
References: <64827323f7134aea810788b3ec6cf516@localhost.talkaboutprogramming.com>
	<mailman.2928.1109066131.22381.python-list@python.org>
	<421b4e54@nntp0.pdx.net>
Message-ID: <S7idnbLvYoFTFobfRVn-tw@comcast.com>

Scott David Daniels wrote:
> or even (if you can't be bothered to look up when features happened):
> 
>     try:
>         test = enumerate
>     except NameError:
>         def enumerate(iterable):
>             ...
>     try:
>         test = sorted
>     except NameError:
>         def sorted(iterable, cmp=None, key=None, reverse=False):
>             ...

Ridiculously minor nit, but there's no reason to assign to test:

     try:
         enumerate
     except NameError:
         def enumerate(iterable):
             ...
     try:
         sorted
     except NameError:
         def sorted(iterable, cmp=None, key=None, reverse=False):
             ...

Just evaluating the expression 'enumerate' or 'sorted' should raise the 
NameError if they don't exist.

STeVe


From stefan.behnel-n05pAM at web.de  Sun Feb 13 06:47:10 2005
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Sun, 13 Feb 2005 12:47:10 +0100
Subject: [PATCH] Re: frozenset() without arguments should return a
	singleton
In-Reply-To: <L_wPd.19688$ya6.18125@trndny01>
References: <001701c51145$410e50c0$deae958d@oemcomputer>
	<culvhv$fgv$1@lnx107.hrz.tu-darmstadt.de>
	<L_wPd.19688$ya6.18125@trndny01>
Message-ID: <cunenl$u6f$1@lnx107.hrz.tu-darmstadt.de>



Raymond Hettinger wrote:
>>>It is not quite correct to say that this is what all immutables do:
>>>
>>>.>>>x = 500
>>>.>>>y = 600 - 100
>>>.>>>x is y
>>>False
> 
> That is an implementation detail, not guaranteed by the language (i.e. not
> necessarily true in future versions, in Jython, or other implementations).  It
> is just an optimization that made sense for tuples but not necessarily for other
> immutables.

Jp had another good example with long(). I take your point, not relying on it 
is a safer bet.


> That solution is reasonable and portable:
> 
> emptyset = frozenset()
> f('abc', emptyset)
> g('def', emtpyset)
> h(1, 2, emtpyset, True)
>  . . .
> 
> I also find it be more readable than:
> 
> f('abc', frozenset())
> g('def', frozenset())
> h(1, 2, emtpyset, frozenset())

I also find it more readable (it's the idiom I currently use) and normally the 
places where this is used are quite local in the code, usually at class level. 
I don't think, though, that your argument about faster local variable access 
holds for that level also.


>>Also, I don't know what else needs to be changed and what a difference that
>>makes. But if the added code is reasonably limited, I'd vote for it.
> 
> Will think about it for a while.  I'm not terribly opposed to the idea.  I just
> find the case for it to be somewhat weak.  Also, I'm not sure it warrants the
> effort, the code clutter, or introducing issues like having a semantic
> difference between the result of frozenset() and the result of frozenset([]).

.>>> tuple(i for i in [False] if i) is ()
False
.>>> tuple(i for i in []) is ()
False
.>>> tuple([]) is ()
True

I see the difference. And I guess it's the same argument you (?) recently had 
on c.l.py about propagating __len__ in builtin iterators. But still, it's not 
really about semantic differences but about implementation details that are 
there to make a difference in certain cases. So I was somewhat wrong about 
extrapolating features of immutable types.

Ok, I admit that the priority of this change is not very high. Admittedly, the 
set types are too recent in Python to claim 'major common use cases' that 
demand optimization. But I generally believe that many programmers will 
silently expect frozenset() to be (and become) more efficient than set() - in 
whatever regard: processing, memory, etc. - and use it when they think 
appropriate. We'll see.

Stefan


From xeoicq at netscape.net  Thu Feb 17 07:27:43 2005
From: xeoicq at netscape.net (xeoicq at netscape.net)
Date: 17 Feb 2005 04:27:43 -0800
Subject: keeping a COM server alive
References: <1108382003.358573.132710@c13g2000cwb.googlegroups.com>
	<42109641$0$6592$8fcfb975@news.wanadoo.fr>
	<mailman.2633.1108485376.22381.python-list@python.org>
Message-ID: <1108643263.450327.263010@f14g2000cwb.googlegroups.com>

Hi,

thanks, I 'll post the problem in python-win32 at python.org ...

   Frank



From marian at mba-software.de  Sun Feb  6 05:48:44 2005
From: marian at mba-software.de (=?ISO-8859-1?Q?Marian_Aldenh=F6vel?=)
Date: Sun, 06 Feb 2005 11:48:44 +0100
Subject: pygame.mixer.music not playing
Message-ID: <36mb0iF54udklU1@individual.net>

Hi,

I am trying to make pygame play music on windows. This simple program:

	import pygame,time
	pygame.init()
	print "Mixer settings", pygame.mixer.get_init()
	print "Mixer channels", pygame.mixer.get_num_channels()
	pygame.mixer.music.set_volume(1.0)
	pygame.mixer.music.load('file1.mp3)
	print "Play"
	pygame.mixer.music.play()

	while pygame.mixer.music.get_busy():
		print "Playing", pygame.mixer.music.get_pos()
		time.sleep(1)
	
	print "Done"

seems to work. It runs the loop and prints values that look like ms into the
file. After a reasonable time corresponding to the length of "file1.mp3" the
loop is exited and the program ends.

The same thing happens for .mp3 files, .ogg files and .wav files.

Fine. The only problem is that there is no sound :-).

What am I doing wrong? pyGame example games do play sound, but I have not
found an example that uses music.

My ultimate goal is to build a MP3 jukebox that runs on Windows and Linux. I
have chosen pyGame as I am making a graphical Frontend using OpenGL. I have
also tried to look at pymad (which I could not get to work on Windows, no
C-Compiler on this machine and I could not find binaries) and audiere (no
skipping, at least in the python binding. A feature I would like to have.)

Ciao, MM
-- 
Marian Aldenh?vel, Rosenhain 23, 53123 Bonn. +49 228 624013.
http://www.marian-aldenhoevel.de
"Wir brauchen keine Opposition, wir sind bereits Demokraten."


From stein at ife.no  Fri Feb 11 07:29:53 2005
From: stein at ife.no (Stein Morten Sandbech)
Date: Fri, 11 Feb 2005 13:29:53 +0100
Subject: THREAD_STACK_SIZE and python performance?
Message-ID: <ef836635d01c616fb2ec05f690c4cf9c@ife.no>

Hi,

I've been googling for any info on the (possible)
effects on python and python applications with
varying values on the THREAD_STACK_SIZE
with respect to performance etc.

The default 0x20000 is way to low when running
a Zope 2.7.4 and Plone 2.0.5 site.

The FreeBSD patch, setting the value to 0x100000
seems to be enough for most of our zope servers,
however, I've noticed that we get an occasional
server death even with this value. This is on normal
load, but handling many and large CMS operations
in zope/plone.

So, any thoughts on even larger thread stacks?

On beforehand, thank you

Stein M. Sandbech

--sms



From peter at engcorp.com  Tue Feb 22 13:23:08 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 22 Feb 2005 13:23:08 -0500
Subject: Comm. between Python and PHP
In-Reply-To: <lnsm11d91ug2gfh5gjvutga4dthhg0rjbf@4ax.com>
References: <lnsm11d91ug2gfh5gjvutga4dthhg0rjbf@4ax.com>
Message-ID: <nfWdnY2gUtSY5IbfRVn-tw@powergate.ca>

Nils Emil P. Larsen wrote:
> I'm building a daemon in Python. It will measure and control some
> physical devices on a serial bus. Since it is a daemon, it will never
> terminate and I can't interfere with the regulation of the devices by
> using command line parameters. I want to control the regulation by
> using a Internet browser.
> 
> What is the easiest way to make my threaded Python daemon communicate
> with a PHP-script running from Apache2 on localhost?

"Easiest" of course depends on lots of things, and mostly on
specifics that you haven't told us, and your personal preference.

Two obvious possibilities that come to mind are "write a file
somewhere from PHP and poll for updates from Python", and
"use sockets (TCP)" or "use UDP".

Maybe if you can describe more about what you need (e.g. what
form will this "control" take?) some even simpler suggestions
will come to mind.

-Peter


From noway at sorry.com  Fri Feb 11 03:43:43 2005
From: noway at sorry.com (Giovanni Bajo)
Date: Fri, 11 Feb 2005 08:43:43 GMT
Subject: PyINI : Cross-Platform INI parser
References: <cuhiak$2gl8$1@mail.cn99.com>
Message-ID: <3f_Od.26957$QG6.468964@twister2.libero.it>

SeSe wrote:

> hi, every one,
>
> I started a opensource project PyINI for corss-platform *.ini parsing
> at http://sourceforge.net/projects/pyini/
>
> I have released a simple alpha version, which can read *.ini, with
> some extended features such as "key=value1,value2,value3". I also
> made a c++ binding to PyINI with elmer toolkit.


The most useful feature would be to be able to write INI files back without
affecting their formatting, without removing user commands, etc. This is what
Windows APIs do, and it is what I am missing from most INI parsing libraries
out there.
-- 
Giovanni Bajo




From Selfimprover at nospam.com  Sat Feb  5 14:10:12 2005
From: Selfimprover at nospam.com (Selfimprover)
Date: Sat, 05 Feb 2005 19:10:12 GMT
Subject: Which IDE supports python and wxpython?
Message-ID: <oS8Nd.4231$bw.168035@phobos.telenet-ops.be>

Hello all,

Is there a good IDE on the market which supports python and wxpython. Goal
is to use it in a big distributed project.

Greetings




From __peter__ at web.de  Mon Feb  7 13:11:30 2005
From: __peter__ at web.de (Peter Otten)
Date: Mon, 07 Feb 2005 19:11:30 +0100
Subject: Unable to run IDLE Under Windows
References: <060220052259038640%eq_fidget@mac.com>
	<cu7t51$cic$02$1@news.t-online.com>
	<mailman.2091.1107796384.22381.python-list@python.org>
Message-ID: <cu8b0n$7ut$01$1@news.t-online.com>

Brian van den Broek wrote:

>> # IDLE reads several config files to determine user preferences.??This
>> # file is the default config file for general idle settings.
> 
> <SNIP details of config filenames and purposes>

> Thanks for posting that, Peter. It helped me work out my problem that
> I posted about a few days back <http://tinyurl.com/3s7gn>.

You're welcome.
 
> Could I ask where did you get the content from? I've searched my HDD
> for some of the contained phrases with the Windows tools I have at my
> disposal, but didn't manage to find the text you posted. (If I'd been
> able to find it, I'd have been able to solve my problem days ago.)

I guess the showstopper has been the unusual suffix .def for "default
configuration" :-)

On Linux it's in 

/usr/local/lib/python2.4/idlelib/config-main.def

Should be easy to translate for Windows. 

Peter



From deetsNOSPAM at web.de  Thu Feb 17 11:37:50 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Thu, 17 Feb 2005 17:37:50 +0100
Subject: difference between class methods and instance methods
References: <pan.2005.02.17.07.04.37.907754@yahooz.com>
	<Xns96005FE3164DAduncanrcpcouk@127.0.0.1>
	<1119g2rre5g610c@corp.supernews.com>
	<37juh3F5d511mU1@individual.net>
	<1119htp837s5b9f@corp.supernews.com>
Message-ID: <37jvi1F5cvtjqU1@individual.net>

> Ohhhhhhhh. Unlike C++, where methods are not first class objects
> and you only have *one* that gets shared by all instances.

Exactly - so unlike in c++, where you have to do ugly hacks if e.g. a C-lib
takes a callback and you want to pass an instance method, you can do that
in python. It's really great.

-- 
Regards,

Diez B. Roggisch


From donn at drizzle.com  Sat Feb 26 12:16:35 2005
From: donn at drizzle.com (Donn Cave)
Date: Sat, 26 Feb 2005 17:16:35 -0000
Subject: Threading and consuming output from processes
References: <1109278779.955986.193860@z14g2000cwz.googlegroups.com>
	<1109283053.971905.27670@z14g2000cwz.googlegroups.com>
	<1109295016.597170.21350@o13g2000cwo.googlegroups.com>
	<YBwTd.38471$H05.20645@twister.nyroc.rr.com>
	<mailman.3032.1109301798.22381.python-list@python.org>
	<donn-03556F.10244325022005@gnus01.u.washington.edu>
	<mailman.3090.1109432332.22381.python-list@python.org>
Message-ID: <1109438194.222125@yasure>

Quoth Jack Orenstein <jao at geophile.com>:
[ ... re alternatives to threads ]
| Thanks for your replies. The streams that I need to read contain
| pickled data. The select call returns files that have available input,
| and I can use read(file_descriptor, max) to read some of the input
| data. But then how can I convert the bytes just read into a stream for
| unpickling? I somehow need to take the bytes arriving for a given file
| descriptor and buffer them until the unpickler has enough data to
| return a complete unpickled object.
|
| (It would be nice to do this without copying the bytes from one place
| to another, but I don't even see how do solve the problem with
| copying.)

Note that the file object copies bytes from one place to another,
via C library stdio.  If we could only see the data in those
stdio buffers, it would be possible to use file objects with
select() in more applications.  (Though not with pickle.)  Since
input very commonly needs to be buffered for various reasons, we
end up writing our own buffer code, all because stdio has no
standard function that tells you how much data is in a buffer.

But unpickling consumes an I/O stream, as you observe, so as a
network data protocol by itself, it's unsuitable for use with
select.  I think the only option would be a packet protocol -
a count field followed by the indicated amount of pickle data.
I suppose I would copy the received data into a StringIO object,
and unpickle that when all the data has been received.

Incidentally, I think I read here yesterday, someone held a book
about Python programming up to some ridicule for suggesting that
pickles would be a good way to send data around on the network.
The problem with this was supposed to have something to do with
"overloading".  I have no idea what he was talking about, but you
might be interested in this issue.

	Donn Cave, donn at drizzle.com


From http  Mon Feb 21 12:25:05 2005
From: http (Paul Rubin)
Date: 21 Feb 2005 09:25:05 -0800
Subject: Unittest - testing properties (read-only attributes)
References: <uu0o5c0br.fsf@yahoo.co.uk>
	<roy-7E7A58.12112821022005@reader2.panix.com>
	<uaKdncr3ppCbhIffRVn-rA@powergate.ca>
Message-ID: <7xu0o5akr2.fsf@ruckus.brouhaha.com>

Peter Hansen <peter at engcorp.com> writes:
> > You want something like
> > self.assertRaises(AttributeError, lambda: self.combat.value = 1)
> 
> Or, combining the two responses and avoiding the lambda:
> 
>   self.assertRaises(AttributeError, setattr, self.combat, 'value', 1)
> 
> Hmm... this might be a case where the lambda form is actually the
> more readable one...

Yes, assignment expressions could make code more readable, if Python
supported them.


From amk at amk.ca  Sun Feb 27 17:37:51 2005
From: amk at amk.ca (A.M. Kuchling)
Date: Sun, 27 Feb 2005 16:37:51 -0600
Subject: Zeroconf article
Message-ID: <SLadnbs01agi1r_fRVn-2A@speakeasy.net>

I've written a little introductory article on using the Zeroconf protocol
with Python.  Zeroconf allows servers running on one machine to publish
their existence to other machines on the local network; applications can 
then locate available servers.

The article is:
    http://www.amk.ca/python/zeroconf

(Some people will have already seen this article on my weblog or on the
daily Python-URL.  The only change is that a new release of PyZeroconf has
been made, and the text has been updated to mention this.)

--amk


From les_ander at yahoo.com  Tue Feb 22 15:18:22 2005
From: les_ander at yahoo.com (les_ander at yahoo.com)
Date: 22 Feb 2005 12:18:22 -0800
Subject: a wrapper to invoke functions using argument
Message-ID: <1109103502.573234.46650@l41g2000cwc.googlegroups.com>

Hi,
support I have a library of function, called mylib.py, in which
there are 2 functions 'f1' and 'f2' (1 arguments in either one);

Now I want to write a wrapper that will invoke f1 or f2 using the
command line argument. So for example, I want to write a function
"call.py" and invoke it as

python call.py f1 arg1

So this is straight forward, but I don't know how to evaluate a
function.
any help would be much appreciate it.
les



From alex at psi.com.au  Sun Feb 27 19:54:19 2005
From: alex at psi.com.au (Alex Le Dain)
Date: Mon, 28 Feb 2005 08:54:19 +0800
Subject: Trees
Message-ID: <42226BBB.3010203@psi.com.au>

 > Would this be for a GUI toolkit or maybe using a standard
 > class scheme?

Sorry, yes I should have been more specific. I meant a non-GUI, standard 
class scheme. I want to use the scheme to hold a structure in memory and 
retrieve/add information to it.

I've had a couple of goes myself but get a bit confuesd about whether I 
should use recursion to be able to get the children (and all 
"sub"-children) of a/the parent.

cheers, Alex.

-- 
Poseidon Scientific Instruments Pty Ltd
1/95 Queen Victoria St
FREMANTLE  WA, AUSTRALIA

Ph: +61 8 9430 6639     Fx: +61 8 9335 4650
Website:  www.psi.com.au

PSI, an ISO-9001 Company

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attached files re-supplied.


From per.bergstrom at etx.ericsson.se  Tue Feb 22 08:34:57 2005
From: per.bergstrom at etx.ericsson.se (per.bergstrom at etx.ericsson.se)
Date: Tue, 22 Feb 2005 14:34:57 +0100
Subject: serial port server cnhd38
Message-ID: <421B3501.8050400@etx.ericsson.se>

To whom it may concern,

The serial port server 'cnhd38' has been terminated (on who's
initiative, I don't know).
It affects the users of the (at least) following nodes:
cnhd36, cnhd44, cnhd45, cnhd46, cnhd47.

The new terminal server to use is called 'msp-t01'. The port
numbers that are of interest for the nodes mentioned above are
as follows:

port 17: this port is shared between:
   cnhd44/etm4 serial port (via riscwatch), currently connected here.
   cnhd36/console port
port 18: this port goes to cnhd44/console port
port 19: this port goes to cnhd45/console port
port 20: this port goes to cnhd47/console port
port 21: this port goes to cnhd46/console port

To connect to a port, just enter the following command:

telnet msp-t01 <prefix><portnumber>

... an extra <enter> should give you the prompt.
<prefix> is always 20
<portnumber> is the port number...

example, connect to cnhd47/console port:
telnet msp-t01 2020

br
/Per


From tundra at tundraware.com  Fri Feb  4 03:28:13 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 04 Feb 2005 03:28:13 EST
Subject: OT: why are LAMP sites slow?
In-Reply-To: <7xmzukwz28.fsf@ruckus.brouhaha.com>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<kavad2-59d.ln1@eskimo.tundraware.com>
	<7xlla5t3lw.fsf@ruckus.brouhaha.com>
	<g9ibd2-kuf.ln1@eskimo.tundraware.com>
	<7xmzukwz28.fsf@ruckus.brouhaha.com>
Message-ID: <q6obd2-o0h.ln1@eskimo.tundraware.com>

Paul Rubin wrote:

> Tim Daneliuk <tundra at tundraware.com> writes:
> 
>>[other good stuff from Tim snipped]
>>
>>>Today I think most seeks can be eliminated by just using ram or SSD
>>>(solid state disks) instead of rotating disks.  But yeah, you wouldn't
>>>do that on a laptop.
>>
>>But that still does not solve the latency problem of session
>>establishment/ teardown over network fabric which is the Achilles
>>Heel of the web and web services.
> 
> 
> Well, HTTP 1.1 keepalives takes care of some of that, but really,
> really, most of this problem is server side, like when you browse a
> Wikipedia page it might take a few seconds, which isn't good, but when
> you update it, it takes most of a minute, which is awful.  The
> difference is that editing means server side web cache misses followed
> by a database update that affects numerous indices.

Noted and agreed.  However, also note that establishing/killing
sessions over a high-latency architecture is generally problematic.
The latency can come from any number of sources including servers
starving for memory/cache misses, as well as the network itself exhbiting
latency problems.  One of reasons the older CRS systems were so fast
was that, although the connection *speeds* were low, the networks were
private, polled fabric with very predictable performance characteristics.
Every terminal was guaranteed to be serviced at a regular interval.
Better customers (who were guaranteed better service levels) just got
their terminals serviced more frequently.

When I left Apollo in the mid-
1990s, there were customers running on this private network who were
guaranteed 3 second or better *round-trip* time (from Enter to transaction
results displayed).  This was in an environment with nearly 100,000
users and the core system peaking at something like 22,000 TPC/As
per second ... with 2 or 3 minutes of scheduled downtime per year.
This kind of performance comes from looking at the architecture as a whole,
not just pieces and parts.  One of the troublesome things about the web
is that this kind of systemic thinking about performance and reliability
seems to be rather rare.  For instance, he whole design of SOAP/RPC seems to be
oblivious to the 40+ years of history on these issues that preceded
the web.

With the advent of public/dynamic networks where a lot of discovery and
variable load exists, it is much harder to nail up a latency and
throughput guarantee.  This is part of the motiviation for adding QOS
facilities to IPV6.  However, as a practical matter, I think the explosion
of last-mile broadband as well as generally more lit up fiber in the backbones
may make QOS less necessary - we'll just throw bigger pipes at the problem.
It is well within the realm of possibility that we'll see OC3 class bandwidth
to the premise for reasonable cost in the foreseeable future.

> 
> Wikipedia keeps having these fundraising drives to buy more server CPU
> iron (I've donated a few times) but I wonder if they'd be better off
> spending it on solid state disks and/or software reorganization.

Since I do not use Wikipedia, I have no meaningful comment.  As someone
pointed out here, PHP is also suspect when seeing performance issues.

<OB Python Comment>

One of the things I love about Python is its facility for allowing you to do
things that are time-insensitive in a VHLL and then dive into C or even assembler
if needed for the time-critical stuff.  This fixes the language part of the
architecture problem, but does not, in and of itself, amerliorate the larger
systems architeture questions (nor would I expect it to)...
-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From kashmira_v_phalak at yahoo.com  Wed Feb 23 18:48:51 2005
From: kashmira_v_phalak at yahoo.com (clementine)
Date: Wed, 23 Feb 2005 18:48:51 -0500
Subject: Problem with the sort() function
References: <64827323f7134aea810788b3ec6cf516@localhost.talkaboutprogramming.com>
	<1109107319.225838.36000@o13g2000cwo.googlegroups.com>
Message-ID: <5217a8aaef41f0b7bae10561ff5d767c@localhost.talkaboutprogramming.com>

Thanks everyone!!:-) Nicks solution coupled with John's modifications
worked great for 2.2!! Yipeee...!!:):)




From williams13 at llnl.gov  Mon Feb 28 13:34:20 2005
From: williams13 at llnl.gov (Dean N. Williams)
Date: Mon, 28 Feb 2005 10:34:20 -0800
Subject: Building Python with Tcl/Tk on Cygwin_NT-5.1
In-Reply-To: <20050210120250.GA4084@tishler.net>
References: <41FF5A67.3090606@llnl.gov> <20050201125129.GA432@tishler.net>
	<41FFA7C9.4070308@llnl.gov> <20050202124435.GA2472@tishler.net>
	<4200D056.4010000@llnl.gov> <4200D22D.9070000@llnl.gov>
	<20050202133005.GE2472@tishler.net> <4208E247.8030706@llnl.gov>
	<20050208175514.GA3788@tishler.net> <420A372F.7020800@llnl.gov>
	<20050210120250.GA4084@tishler.net>
Message-ID: <4223642C.7000002@llnl.gov>



Hi Jason,

    I have a other Cygwin port question. It turns out that the 
auto-import for XtStrings an widgetClass didn't get resolved. This a 
similar auto-import resolving error that I got when trying to build 
Tcl/Tk. I ended up using the shared Tcl/Tk that came with Cygwin. But in 
this case I must be able to build my software. Can you tell me how to 
get around this problem? Or can you tell me which cygwin mail list to 
send my plea for help?

Thanks and best regards,
    Dean


gcc -shared -Wl,--enable-auto-image-base  -o gplot gplot.o cgm.o ccgm.o 
utils.o io.o carray.o devices.o hload.o emul.o tty.o ps.o cgmc.o 
xws_cla.o xws_color.o xws_delim.o xws_marker.o xws_polygon.o 
xws_polyline.o xws_setup.o xws_text.o drvcla.o    -L/usr/X11R6/lib -lXp 
-lXpm -lXaw -lXmu -lXext -lXt -lX11     /usr/lib/libm.a -lc
Info: resolving _XtStrings by linking to __imp__XtStrings (auto-import)
Info: resolving _widgetClass by linking to __imp__widgetClass (auto-import)
 >

P.S. "Platform Windows XP/Cygwin 1.5.1."



From pronovic at skyjammer.com  Wed Feb 23 13:08:49 2005
From: pronovic at skyjammer.com (Kenneth Pronovici)
Date: Wed, 23 Feb 2005 12:08:49 -0600
Subject: LC_ALL and os.listdir()
In-Reply-To: <20050223070348.GA7565@skyjammer.com>
References: <20050223070348.GA7565@skyjammer.com>
Message-ID: <20050223180848.GB25846@skyjammer.com>

On Wed, Feb 23, 2005 at 01:03:56AM -0600, Kenneth Pronovici wrote:
[snip]
> Today, I accidentally ran across a directory containing three "normal"
> files (with ASCII filenames) and one file with a two-character unicode
> filename.  My code, which was doing something like this:
>    
>    for entry in os.listdir(path):   # path is <type 'unicode'>
>       entrypath = os.path.join(path, entry)
> 
> suddenly started blowing up with the dreaded unicode error:
> 
>    UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in 
>    position 1: ordinal not in range(128)

Sorry to reply to my own note, but after sleeping on it, I think I've
come up with a reasonable solution.  Now that I've dug further and my
eyes are less bleery, everything seems to work as long as I only pass in
simple strings to the filesystem functions.  

I think that I can solve my problem by just converting any unicode
strings from configuration into utf-8 simple strings using encode().
Using this solution, all of my existing regression tests still pass, and
my code seems to make it past the unusual directory.

>    [u'README.strange-name', '\xe2\x99\xaa\xe2\x99\xac', 
>     u'utflist.long.gz', u'utflist.cp437.gz', u'utflist.short.gz']
> 
> Note that in this second result, element [1] is not a unicode string
> while the other three elements are.

I'm still confused as to why this happens, but since I work around it, I
guess I don't care so much.

Thanks,

KEN

-- 
Kenneth J. Pronovici <pronovic at ieee.org>


From opengeometry at yahoo.ca  Thu Feb 24 22:36:54 2005
From: opengeometry at yahoo.ca (William Park)
Date: Fri, 25 Feb 2005 03:36:54 GMT
Subject: Converting HTML to ASCII
References: <mailman.3027.1109294801.22381.python-list@python.org>
Message-ID: <q3xTd.1189$qZ5.1018@fe51.usenetserver.com>

gf gf <unknownsoldier93 at yahoo.com> wrote:
> Hi.  I'm looking for a Python lib to convert HTML to
> ASCII.  Of course, a quick Google search showed
> several options (although, I must say, less than I
> would expect, considering how easy this is to do in
> *other* languages... :| ), but, I have 2 requirements,
> which none of them seem to meet:
> 
> 1) Be able to handle badly formed, or illegal, HTML,
> as best as possible.  Some of the converters I tried
> ended up dieing on a weird character (that is, a high
> ascii char).  Others somehow got confused and dumped
> the JavaScript as well.
> 
> 2) Not embellish the text in any way - no asterisks,
> no bracket links, no __ for underlines.
> 
> Can anyone direct me to something which could help me
> for this?

man lynx
man links
man w3m

-- 
William Park <opengeometry at yahoo.ca>, Toronto, Canada
Slackware Linux -- because I can type.



From wpeterson1 at socal.rr.com  Fri Feb 25 14:38:22 2005
From: wpeterson1 at socal.rr.com (Bill)
Date: 25 Feb 2005 11:38:22 -0800
Subject: wxpython tutorials
References: <1109309093.384392.59230@l41g2000cwc.googlegroups.com>
Message-ID: <1109360302.619156.31130@z14g2000cwz.googlegroups.com>


Raghul wrote:
> hi,
>
>     I want to learn Wxpython to work in windows.Is there any
tutorials
> available?Pls specify the link that will be easy to learn for
beginers
> like me

An approach that I find useful is to use an IDE to build the base
application structure, then examine the generated code. This has an
advantage over trying to build something from scratch as a newbie - the
code will run straightaway. wxPython has Boa Constructor and wxGlade
available.

http://sourceforge.net/project/showfiles.php?group_id=1909&release_id=150280

http://wxglade.sourceforge.net/

Some depends on how much you want to learn wxPython vs. just use it. If
you learn more easily building from scratch then the other replies are
pointing you in the right direction.

Bill



From tchur at optushome.com.au  Mon Feb  7 21:24:35 2005
From: tchur at optushome.com.au (Tim Churches)
Date: Tue, 08 Feb 2005 13:24:35 +1100
Subject: Big development in the GUI realm
Message-ID: <200502080224.j182OZYu003578@mail13.syd.optusnet.com.au>

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From caleb1 at telkomsa.net  Thu Feb  3 23:06:38 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Thu, 03 Feb 2005 23:06:38 -0500
Subject: Basic file operation questions
References: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
	<opsllt9r191js0xs@news.telkomsa.net>
	<mailman.1808.1107431422.22381.python-list@python.org>
	<ctt53b$l5u$00$1@news.t-online.com>
Message-ID: <opslnm1cge1js0xs@news.telkomsa.net>

Peter

> Yes, you can even write
>
> f = open("data.txt")
> for line in f:
>     # do stuff with line
> f.close()
>
> This has the additional benefit of not slurping in the entire file at  
> once.

Is there disk access on every iteration?   I'm guessing yes?  It shouldn't  
be an issue in the vast majority of cases, but I'm naturally curious :)

thx
Caleb




From egrimleyevans at yahoo.co.uk  Mon Feb 28 03:15:21 2005
From: egrimleyevans at yahoo.co.uk (egrimleyevans at yahoo.co.uk)
Date: Mon, 28 Feb 2005 08:15:21 +0000 (GMT)
Subject: Yahoo! Auto Response
Message-ID: <20050228081521.A5F7E1E4003@bag.python.org>

Saluton!

Jen auxtomate sendita mesagxo kun gxenerala averto:

Mi tre malofte kontrolas mian posxtkeston cxe yahoo.co.uk. Kiam mi
kontrolos gxin, mi eble ne rimarkos vian mesagxon inter la miloj da
spamoj. Normale do pli indas skribi al edmundo cxe rano punkto org.

Edmundo


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From francis.girard at free.fr  Mon Feb 14 15:31:50 2005
From: francis.girard at free.fr (Francis Girard)
Date: Mon, 14 Feb 2005 21:31:50 +0100
Subject: Iterator / Iteratable confusion
In-Reply-To: <cuolu7$qv7$1@sea.gmane.org>
References: <420a5c1e$0$21630$a1866201@visi.com>
	<200502131958.27410.francis.girard@free.fr>
	<cuolu7$qv7$1@sea.gmane.org>
Message-ID: <200502142131.53265.francis.girard@free.fr>

Le dimanche 13 F?vrier 2005 23:58, Terry Reedy a ?crit?:
> Iterators are a subgroup of iterables. ?Being able to say iter(it) without
> having to worry about whether 'it' is just an iterable or already an
> iterator is one of the nice features of the new iteration design.
>
> Terry J. Reedy

Hi,

I have difficulties to represent an iterator as a subspecie of an iteratable 
as they seem profoundly different to me. But it just might be that my mind is 
too strongly influenced by the C++ STL where there is a clear (I resist to 
say "clean") distinction between iteratable and iterator.

One of the result of not distinguishing them is that, at some point in your 
programming, you are not sure anymore if you have an iterator or an 
iteratable ; and you might very well end up calling "iter()" or "__iter__()" 
everywhere.

I am not concerned with the small performance issue involved here (as I very 
seldom am) but with clarity. After all, why should you have to call __iter__ 
on an iterator you just constructed (as in my dummy "example 2") ? One might 
wonder, "what ? isn't this already the iterator ?" But this, I agree, might 
very well just be a beginner (as I am) question, trying to learn the new 
iterator semantics.

I have a strong feeling that the problem arises from the difficulty to marry 
the familiar ""for ... in ..."" construct with iterators. If you put an 
iteratable in the second argument place of the construct (as is traditionally 
done) then the syntax construct itself is an implicit iterator. Now, if you 
have explicit iterators then they don't fit well with the implicit iterator 
hidden in the syntax.

To have iterators act as iteratables might very well had been a compromise to 
solve the problem.

I am not sure at all that this is a "nice feature" to consider an iterator at 
the same level that an iteratable. It makes it a bit more akward to have the 
"mind impulse", so to speak, to build iterators on top of other iterators to 
slightly modify the way iteration is done. But I think I'm getting a bit too 
severe here as I think that the compomise choice made by Python is very 
acceptable.

Regards,

PS : I am carefully reading Micheal Spencer very interesting reply.

Thank you,

Francis Girard







From steven.bethard at gmail.com  Fri Feb 11 18:51:18 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 11 Feb 2005 16:51:18 -0700
Subject: namespaces module (a.k.a. bunch, struct, generic object, etc.)
 PEP
In-Reply-To: <mailman.2383.1108124347.22381.python-list@python.org>
References: <GaudndOHLML3M5bfRVn-vg@comcast.com>
	<mailman.2383.1108124347.22381.python-list@python.org>
Message-ID: <LvSdnbe2vZhv2ZDfRVn-tQ@comcast.com>

Nick Coghlan wrote:
> Steven Bethard wrote:
>>     >>> ns = Namespace(eggs=1)
>>     >>> Namespace.update(ns, [('spam', 2)], ham=3)
>>     >>> ns
>>     Namespace(eggs=1, ham=3, spam=2)
>>
>> Note that update should be used through the class, not through the
>> instances, to avoid the confusion that might arise if an 'update'
>> attribute added to a Namespace instance hid the update method.
> 
> I'd like to see the PEP text itself encourage the more inheritance 
> friendly style used in the __init__ method:
>   type(ns).update(ns, [('spam', 2)], ham=3)

Where in the PEP do you think this belongs?  Or did you mean you wanted 
it in the docstrings of the Namespace functions?

>> Note that support for the various mapping methods, e.g.
>> __(get|set|del)item__, __len__, __iter__, __contains__, items, keys,
>> values, etc. was intentionally omitted as these methods did not seem
>> to be necessary for the core uses of an attribute-value mapping.  If
>> such methods are truly necessary for a given use case, this may
>> suggest that a dict object is a more appropriate type for that use.
> 
> The 'vars' builtin also makes it trivial to use dictionary style 
> operations to manipulate the contents of a Namespace.

Right, I had meant to mention that.  Thanks!

>> Should namespace chaining be supported?  One suggestion would add a
>> NamespaceChain object to the module::
> 
> This does have the advantage of keeping the basic namespace simple. 
> However, it may also be worth having native chaining support in Namespace:

I think I prefer the separate NamespaceChain object because it allows 
you to chain namespaces other than just Namespace objects -- any object 
that supports getattr is okay.  If chaining is builtin, all namespaces 
(except the last one?) have to be Namespace objects...

>>     class NamespaceChain(object):
>>         """NamespaceChain(*objects) -> new attribute lookup chain
>>
>>         The new NamespaceChain object's attributes are defined by the
>>         attributes of the provided objects.  When an attribute is
>>         requested, the sequence is searched sequentially for an object
>>         with such an attribute.  The first such attribute found is
>>         returned, or an AttributeError is raised if none is found.
>>
>>         Note that this chaining is only provided for getattr and delattr
>>         operations -- setattr operations must be applied explicitly to
>>         the appropriate objects.
> 
> Hmm, I'm not so sure about this. I think that the right model is the way 
> that a class instance is currently chained with its class.
> 
> That is, assume we have the following:
>   c = cls()
>   ns = Namespace(vars(c), vars(cls)) # Using modified NS above
>   nc = NamespaceChain(Namespace(vars(c)), Namespace(vars(cls)))
> 
> I would expect modification of attributes on ns or nc to behave 
> similarly to modification of attributes on c - attribute retrieval 
> follows the chain, but attribute modification (set/del) always operates 
> on the first namespace in the chain.

Yeah, that makes sense.  I hadn't quite wrapped my head around what 
setattr _aught_ to do in these cases, so I wasn't willing to commit to 
anything yet. ;)  I'll update NamespaceChain to work like classes do...

Steve


From FBatista at uniFON.com.ar  Tue Feb 15 15:45:27 2005
From: FBatista at uniFON.com.ar (Batista, Facundo)
Date: Tue, 15 Feb 2005 17:45:27 -0300
Subject: os.walk() usage
Message-ID: <A128D751272CD411BC9200508BC2194D053C7F97@escpl.tcp.com.ar>

[rbt]

#- The problem I'm encountering is passing the list to other functions. 
#- It's almost as if each function needs to build the list 
#- itself (walk the 
#- filesystem)... which gets in the way of what I was asked to 
#- do (break 
#- this thing up into modular, maintainable pieces).

You should use a class, which has the different functions you told as
methods, but those methods share the "self" namespace.

So, you could do something like:

  mw = MyWalk(path)
  mw.skip_files(...)
  mw.skip_dirs(...)
  mw.search()

.    Facundo

Bit?cora De Vuelo: http://www.taniquetil.com.ar/plog
PyAr - Python Argentina: http://pyar.decode.com.ar/


  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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From bignose-hates-spam at and-benfinney-does-too.id.au  Wed Feb 16 19:39:00 2005
From: bignose-hates-spam at and-benfinney-does-too.id.au (Ben Finney)
Date: Thu, 17 Feb 2005 11:39:00 +1100
Subject: Test for structure
In-Reply-To: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
References: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
Message-ID: <4213e6f9$1@duster.adelaide.on.net>

alex wrote On 17/02/05 02:08:
> how can I check if a variable is a structure (i.e. a list)? For my 
> special problem the variable is either a character string OR a list 
> of character strings line ['word1', 'word2',...]

You're trying to apply the LBYL principle.  My bet is that your "special
problem" can be solved by the EAFP principle.  (These terms are
explained in the Glossary of the tutorial,
<http://www.python.org/doc/current/tut/node18.html>.)

If you test for a specific set of types, your code will not work with
types that you have not considered yet behave like lists.  As you 
discover more object types that you want the code to work with, it will 
sprout more cruft for checking those types.

If you want to use some list behaviour of the object, don't check first.
Use it, and catch the TypeError exception in the event that it's not.
This way, *any* object that implements the functionality you need will
work, regardless of its type.


From klachemin at comcast.net  Thu Feb 24 21:28:12 2005
From: klachemin at comcast.net (Kamilche)
Date: 24 Feb 2005 18:28:12 -0800
Subject: Shift Confusion
In-Reply-To: <cvl3jj$j7m$1@news.astound.net>
References: <1109225214.430739.259600@l41g2000cwc.googlegroups.com>
	<pj0s11p3dn5o9nldsiklptce6j9ts26utf@4ax.com>
	<cvl3jj$j7m$1@news.astound.net>
Message-ID: <1109298492.809550.141790@l41g2000cwc.googlegroups.com>

> Quite. Although you can sort of see how one might naively arrive at
this
> conclusion: one 7-bit char takes 0...127, which when you put it into
an
> 8-bit byte leaves 128...255 unused for a second char....
>
> James

Yep, that's what I was doing. Guess I was too tired to program usefully
last night. 

Thanks for clearing that up, guys!



From grante at visi.com  Mon Feb  7 23:40:41 2005
From: grante at visi.com (Grant Edwards)
Date: 08 Feb 2005 04:40:41 GMT
Subject: Big development in the GUI realm
References: <mailman.2123.1107820051.22381.python-list@python.org>
	<4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com>
	<cu95nd$7cr$1@news1.ucsd.edu>
	<6h7g0113up1v76k7qkad7bt17os1q73510@4ax.com>
	<4208237b$0$21623$a1866201@visi.com> <cu98n4$833$1@news1.ucsd.edu>
	<4208373e$0$21620$a1866201@visi.com> <cu9eg0$9jb$1@news1.ucsd.edu>
Message-ID: <420842c9$0$21626$a1866201@visi.com>

On 2005-02-08, Robert Kern <rkern at ucsd.edu> wrote:

> Believe me, I share your frustration every time this issue comes up. 
> However, I think it's best to follow Robert Heinlein's maxim:
>
>  "Never attribute to malice what can adequately be explained
>   by stupidity."

Of course you are right.

> It seems to me that "Luke" is confused and ignorant. He has shown no 
> indication that he intends to write proprietary software using Qt.

I'm sure he isn't.  

I'd apologize to him as well, but I just can bring myself to 
apologize to somebody named "Luke Skywalker" with an e-mail
address of "luke at tatooine.planet".

-- 
Grant Edwards                   grante             Yow!  Excuse me, but didn't
                                  at               I tell you there's NO HOPE
                               visi.com            for the survival of OFFSET
                                                   PRINTING?


From kylotan at gmail.com  Mon Feb 28 21:04:14 2005
From: kylotan at gmail.com (Ben Sizer)
Date: 28 Feb 2005 18:04:14 -0800
Subject: Sound and music libraries?
Message-ID: <1109642654.301821.21330@o13g2000cwo.googlegroups.com>

Are there any decent sound and music libraries for Python that are
suitable for game use? Pygame is too closely tied to SDL, PyFMOD seems
to no longer be maintained, and ALPY 1.0 has disappeared and is GPL
anyway (not suitable for my purposes). I'd settle for DirectSound
bindings but DirectX use in Python doesn't seem to be done for some
reason.

-- 
Ben Sizer.



From max at alcyone.com  Sat Feb 26 19:08:54 2005
From: max at alcyone.com (Erik Max Francis)
Date: Sat, 26 Feb 2005 16:08:54 -0800
Subject: generic equivalence partition
In-Reply-To: <1109462806.608717.309810@o13g2000cwo.googlegroups.com>
References: <1109245733.261643.219420@f14g2000cwb.googlegroups.com>
	<1109419631.693212.236890@z14g2000cwz.googlegroups.com>
	<1109453893.313217.66290@f14g2000cwb.googlegroups.com>
	<1109462806.608717.309810@o13g2000cwo.googlegroups.com>
Message-ID: <CamdnSDfBvYLkrzfRVn-sg@speakeasy.net>

Xah Lee wrote:

> ... sorry for the latching on on this broadside issue, but it is
> impotant ...

You made a typo in that last word there.  Obviously you meant to write 
an _e_ instead of an _a_.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   All bad poetry springs from genuine feeling.
   -- Oscar Wilde


From danb_83 at yahoo.com  Tue Feb  8 22:34:46 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 8 Feb 2005 19:34:46 -0800
Subject: negative integer division
References: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
	<cu91bf$9nk$1@news.wrc.xerox.com>
Message-ID: <1107920086.888725.228090@l41g2000cwc.googlegroups.com>

Mark Jackson wrote:
> Imbaud Pierre <pierre.imbaud at wanadoo.fr> writes:
> > integer division and modulo gives different results in c and
python,
> > when negative numbers
> > are involved. take gdb as a widely available c interpreter
> >   print -2 /3
> > 0 for c, -1 for python.
> > more amazing, modulos of negative number give negative values! (in
c).
> > from an algebraic point of view, python seems right, but I thought
> > python conformity to the underlying c compiler was a strong
commitment,
>
> AIUI the C standard is silent on the issue, and hence the C behavior
is
> implementation-dependent.

The *original* C standard is silent on the issue, but the current
standard requires the wrong behavior.



From removethis.kartic.krishnamurthy at gmail.com  Sun Feb 27 08:15:10 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Sun, 27 Feb 2005 13:15:10 GMT
Subject: Controlling Pc From Server?
In-Reply-To: <mailman.3115.1109497447.22381.python-list@python.org>
References: <mailman.3115.1109497447.22381.python-list@python.org>
Message-ID: <yJjUd.54225$H05.9663@twister.nyroc.rr.com>

andrea_gavana at tin.it said the following on 2/27/2005 4:44 AM:
> Hello NG,
> 
>         I am trying to find some information about the possibility to control
> two (or more) clients (PCs) via a Python application running on a main server.
> Ideally, this application should be able to monitor (almost in real time)
> the "activity" of these clients (which applications are launched, closed
> and so on, if this is even possible, obviously). Does anyone have to share
> some information/pointer?
> 
> Thank you a lot.
> 
> Andrea.


Andrea,

Since you have not specified any operating system, my suggestion is for 
you to go for a generic solution like pyheartbeat. Pyheartbeat is a 
program with server and client components and uses UDP to monitor which 
client computers are down and which, active.

You can modify pyheartbeat to do what you are wanting, by wrapping your 
monitoring functions and sending that information back to the server. To 
make things more elegant, you could probably come up with an XML schema 
(or other formatted text like JSON or use Pickle to 
serialize/de-serialze data structures) so that the information is 
machine-friendly but you still can translate the XML for a pretty 
display on the server.

Pyheartbeat can be found at 
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52302

If you are using Windows NT-based technology, you can setup your clients 
so that all activity is logged to the server; I believe there are 3rd 
pary applications available that can do this for you. Sorry, I don't 
know the specifics on how to do it.

For *nix OSes, you can have the syslog daemon log to a remote machine 
instead of the local. So, you can log all activity to the UNIX server. 
(Though, to me, it appears that you are looking for remote top like 
functionality for networked PCs).

Thanks,
-Kartic


From jstroud at mbi.ucla.edu  Tue Feb 15 16:46:49 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 15 Feb 2005 13:46:49 -0800
Subject: Access function defaults
In-Reply-To: <1gqsn7o.qyazai1nh7smmN%aleaxit@yahoo.com>
References: <972ec5bd050119111359e358f5@mail.gmail.com>
	<797fe3d405011911465ab59acd@mail.gmail.com>
	<mailman.904.1106165377.22381.python-list@python.org>
	<1106177050.630141.33090@c13g2000cwb.googlegroups.com>
	<972ec5bd0501191641166972b0@mail.gmail.com>
	<mailman.922.1106193225.22381.python-list@python.org>
	<7xis5szpdj.fsf@ruckus.brouhaha.com>
	<mailman.923.1106196903.22381.python-list@python.org>
	<7xekggbrns.fsf@ruckus.brouhaha.com> <SXOHd.82817$Jk5.62292@lakeread01>
	<7x651rwbib.fsf@ruckus.brouhaha.com> <lr1Id.83348$Jk5.73956@lakeread01>
	<mailman.1038.1106337274.22381.python-list@python.org>
	<7xfz0uqe1d.fsf@ruckus.brouhaha.com> <bbnId.4971$ry.3995@fed1read05>
	<7xu0p9lk4h.fsf@ruckus.brouhaha.com>
	<1gqsn7o.qyazai1nh7smmN%aleaxit@yahoo.com>
Message-ID: <1108504009.3892.51.camel@lipscomb.mbi.ucla.edu>

Hello all,

I'm curious--How do I access a function defaults by name?

for example

def bob(wife, wives=[]):
  # add wife to wives if applicable
  if (can_add_wife(wife,wives)):
    wives.append(wife)
  return len(wives)


Say the bob function is adding to wives. What if you want to see what
the wives default is that's being held by the function?

I see you can get at wives with bob.func_defaults, but only if you know
in advance which position it is in in the func_defaults tuple. What if I
want to get at wives by name? bob.wives seems logical but of course
doesn't work. bob.func_code.co_varnames looks like it may work, but
won't because it can't tell you where in func_defaults you you want.
Other than that, I can't seem to find anything.

By the way, I already know a million "better" ways to do this, so no
need for the "why would you want to do that?" responses. I am just
curious about python functions here.

Thanks in advance for any insight.

James
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From fuzzyman at gmail.com  Fri Feb 25 04:32:21 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 25 Feb 2005 01:32:21 -0800
Subject: wxpython tutorials
In-Reply-To: <1109309093.384392.59230@l41g2000cwc.googlegroups.com>
References: <1109309093.384392.59230@l41g2000cwc.googlegroups.com>
Message-ID: <1109323941.960260.289320@f14g2000cwb.googlegroups.com>


Raghul wrote:
> hi,
>
>     I want to learn Wxpython to work in windows.Is there any
tutorials
> available?Pls specify the link that will be easy to learn for
beginers
> like me

I'm just learning wxPython, but rather than do it directly I'm using
wax. wax is another layer that sits on top of wxPython and greatly
simplifies using it in practise.

It's written by Hans Nowak and you can find it over at
http://zephyrfalcon.org

The documentation sin't brilliant (but improving), but the examples are
very good. I'm finding it quite easy - but I did learn Tkinter first,
so I'm familiar with concepts like parent frames, event oriented
programming, call backs, packing widgets, etc.  YMMV :-)

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From stefan.behnel-n05pAM at web.de  Sat Feb 12 17:21:58 2005
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Sat, 12 Feb 2005 23:21:58 +0100
Subject: [PATCH] Re: frozenset() without arguments should return a
	singleton
In-Reply-To: <001701c51145$410e50c0$deae958d@oemcomputer>
References: <001701c51145$410e50c0$deae958d@oemcomputer>
Message-ID: <culvhv$fgv$1@lnx107.hrz.tu-darmstadt.de>



Raymond Hettinger wrote:
 >Stefan Behnel wrote:
>>I stumbled over the fact that 'frozenset()' doesn't return a constant but
>>creates a new object everytime. Since it is immutable, I wrote to  c.l.py 
>>that this behaviour is different from what tuple() & Co do.
> 
> It is not quite correct to say that this is what all immutables do:
> 
> 
>.>>>x = 500
>.>>>y = 600 - 100
>.>>>x is y
> False

I know. The same is true for concateneted strings, etc. But whenever an 
immutable object is created directly ('by hand'), it holds. It also holds, 
btw, for tuple() - as opposed to ().


> For tuples, it is an optimization of a frequent use case (internally,
> empty tuples are passed around for empty argument lists).

I definitely see the use. When I tried to figure out how to implement the 
patch, I looked at the source of tuple objects and saw that there is quite a 
bunch of cached constants. I'm pretty sure such optimizations are not 
necessary for sets.


> Do you have real use cases for frequent creation of frozenset([])?  I
> would be interested in seeing how the application.  As designed, the
> principal use case for frozensets was in implementing sets of sets.  The
> secondary case was for using sets as dictionary keys.  Neither of those
> use cases entails storing more than one instance of frozenset([]).

I actually use frozensets whenever I know that my set is going to be immutable 
(I thought that was what they were meant for).

And similar to the usage of tuples as replacements for empty lists, I 
definitely pass a frozenset whenever I need a dummy set-like object.

If I know that frozenset() is not constant, I may end up with keeping a dummy 
reference around somewhere that is passed instead of a 'new' frozenset(). But 
that is definitely more ugly than making frozenset() constant internally.

I actually see the difference between
constant frozenset()
and
constant frozenset([])
and the like. Just imagine things like
frozenset(for i in [False]*1000 if i)
I wouldn't want a guarantee that that one returns a singleton. I guess that 
check would really make it inefficient: create the object, start adding 
nothing, finish adding nothing, check if anything was added, discard object, 
return singleton. Brrrrr...

But frozenset() should still be the most common case of creating empty sets.

I think the main use case is passing them instead of sets whenever a method 
interface demands a set-like object for read-only access or wants to return an 
empty set. Tuples cannot always replace this.

I started using sets rather frequently in my source and frozenset() tends to 
turn up relatively often.


> I'll ponder your idea for a bit.  As it stands, the patch needs more
> work (to remove the singleton just before Python exits -- see similar
> operations for freelists).

I kinda figured that. Would have been too easy, then... :)


> I don't mind finishing the patch but am not
> sure it is the right thing to do.  It is essentially an optimization of
> one case at the expense of added code and of slightly de-optimizing
> other cases.

Very slightly, I'd say. The only case that eats a couple of instructions at 
creation time is 'new' being called from a subclass. I wouldn't expect many 
people to subclass frozenset - but then, that's just me...

Also, I don't know what else needs to be changed and what a difference that 
makes. But if the added code is reasonably limited, I'd vote for it.

Stefan


From enleverlesO.OmcO at OmclaveauO.com  Mon Feb 21 12:15:40 2005
From: enleverlesO.OmcO at OmclaveauO.com (Do Re Mi chel La Si Do)
Date: Mon, 21 Feb 2005 18:15:40 +0100
Subject: detecting the change in desktop resolution - how?
References: <1109003814.313466.85180@l41g2000cwc.googlegroups.com>
Message-ID: <421a176f$0$11691$8fcfb975@news.wanadoo.fr>

Hi !

On windows, and PyWin, this script give the H/V current resolution :



    import win32com.client
    oWMI = win32com.client.Dispatch("WbemScripting.SWbemLocator")
    owbem = oWMI.ConnectServer(".","root\cimv2")
    collec = owbem.ExecQuery("Select * from Win32_PrinterConfiguration")
    print "Horizontal Resolution: ", collec[0].HorizontalResolution
    print "Vertical Resolution: ", collec[0].VerticalResolution




@-salutations
-- 
Michel Claveau







From raghulj at gmail.com  Wed Feb 23 00:02:44 2005
From: raghulj at gmail.com (Raghul)
Date: 22 Feb 2005 21:02:44 -0800
Subject: reading only new messages in imaplib
In-Reply-To: <mailman.2956.1109133949.22381.python-list@python.org>
References: <ECBA357DDED63B4995F5C1F5CBE5B1E8022289B2@its-xchg4.massey.ac.nz>
	<mailman.2956.1109133949.22381.python-list@python.org>
Message-ID: <1109134964.542053.286920@g14g2000cwa.googlegroups.com>

eceived: from web50
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it prints something like this. what it actually display.And pls tell me
what it actually does? I can't understand



From aleaxit at yahoo.com  Wed Feb  2 03:03:58 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Wed, 2 Feb 2005 09:03:58 +0100
Subject: Next step after pychecker
References: <41ff0308$0$6503$636a15ce@news.free.fr>
	<7xis5cq5bj.fsf@ruckus.brouhaha.com>
	<tyffz0gmtpo.fsf@pcepsft001.cern.ch>
	<cto5b9$hpi$1@swifty.westend.com> <369mivF4ubv6mU1@individual.net>
	<mailman.1708.1107288807.22381.python-list@python.org>
	<420010a0$0$27056$626a14ce@news.free.fr>
Message-ID: <1grcmbw.jprgqm179uih1N%aleaxit@yahoo.com>

Philippe Fremy <phil at freehackers.org> wrote:

> Any other idea of a fun python improvement project I could join without
> too much hassle ? I can't help but thinking that pychecker ought to be
> able to do a better job.

Have a look at pypy -- around the key idea of reimplementing Python's
runtime in Python, type inferencing on a somewhat restricted ("not too
dynamic/meta at runtime") subset of Python plays a key role there.


Alex


From ncoghlan at iinet.net.au  Fri Feb 11 06:22:35 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 11 Feb 2005 21:22:35 +1000
Subject: deepcopy chokes with TypeError on dynamically assigned instance
 method
In-Reply-To: <mn0o01hsaq59bg93cfoonej8ocjsnksgal@4ax.com>
References: <698m01djeu9jqpnvvk64vmc488e5c026im@4ax.com>
	<mn0o01hsaq59bg93cfoonej8ocjsnksgal@4ax.com>
Message-ID: <420C957B.8010709@iinet.net.au>

Kanenas wrote:
> On Thu, 10 Feb 2005 00:54:04 -0800, Kanenas <kanenas @t comcast d.t
> net> wrote:
> 
> 
>>When an instance has a dynamically assigned instance method, deepcopy
>>throws a TypeError with the message "TypeError: instancemethod
>>expected at least 2 arguments, got 0".  
> 
> 
> I forgot to mention that the TypeError is thrown only when
> constructing an instance from another instance in the same class, e.g.
> Foo('bar') is fine but Foo(Foo('bar')) will fail.

Interesting. The problem appears to be that bound methods are not copyable:

 >>> x = Foo('bar')
 >>> x
Foo([b,a,r])
 >>> x.bar
<bound method Foo.bar of Foo([b,a,r])>
 >>> copy(x.bar)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "C:\Python24\lib\copy.py", line 95, in copy
     return _reconstruct(x, rv, 0)
   File "C:\Python24\lib\copy.py", line 320, in _reconstruct
     y = callable(*args)
   File "C:\Python24\lib\copy_reg.py", line 92, in __newobj__
     return cls.__new__(cls, *args)
TypeError: instancemethod expected at least 2 arguments, got 0
 >>> x.__repr__
<bound method Foo.__repr__ of Foo([b,a,r])>
 >>> copy(x.__repr__)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "C:\Python24\lib\copy.py", line 95, in copy
     return _reconstruct(x, rv, 0)
   File "C:\Python24\lib\copy.py", line 320, in _reconstruct
     y = callable(*args)
   File "C:\Python24\lib\copy_reg.py", line 92, in __newobj__
     return cls.__new__(cls, *args)
TypeError: instancemethod expected at least 2 arguments, got 0

Normally, the methods live in the class dictionary, so they don't cause a 
problem with copying the instance.

It turns out this exception actually makes sense, since you *don't* want to copy 
these atributes to the new instance. If you actually copied them, they'd be 
bound to the *old* instance, rather than the new one.

So I expect you'll need to provide a __deepcopy__ in order to correctly generate 
the instancemethods bound to the new instance.

I also realised that the reason the use of a mutable default is OK here is 
because you're deepcopying it.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From mhartl at post.harvard.edu  Sun Feb  6 02:29:30 2005
From: mhartl at post.harvard.edu (Michael Hartl)
Date: 5 Feb 2005 23:29:30 -0800
Subject: How do I convert arithemtic string (like "2+2") to a number?
References: <mailman.1996.1107640917.22381.python-list@python.org>
	<1107641467.104883.177850@c13g2000cwb.googlegroups.com>
	<mailman.2010.1107673611.22381.python-list@python.org>
Message-ID: <1107674970.152776.164170@c13g2000cwb.googlegroups.com>

Adam brings up a good point: eval is a very general function which
evaluates an arbitrary Python expression.  As a result, it (and its
close cousin exec) should be used with caution if security is an issue.

Michael



From andrew.fabbro at gmail.com  Sun Feb 13 17:22:43 2005
From: andrew.fabbro at gmail.com (andrew.fabbro at gmail.com)
Date: 13 Feb 2005 14:22:43 -0800
Subject: AES crypto in pure Python?
Message-ID: <1108333363.915962.160440@z14g2000cwz.googlegroups.com>

I'm looking for an implementation of AES (the Advanced Encryption
Standard) in pure Python.  I'm aware of pycrypto, but that uses C code.
 I'm hoping to find something that only uses Python...I'm willing to
trade speed for portability, since my application is designed for
several different platforms.

Anyone know if this has been done?

Thanks,


-AF



From apardon at forel.vub.ac.be  Mon Feb 21 07:07:33 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 21 Feb 2005 12:07:33 GMT
Subject: lambda closure question
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
Message-ID: <slrnd1jjo4.jkb.apardon@rcpc42.vub.ac.be>

Op 2005-02-19, jfj schreef <jfj at freemail.gr>:
> Carl Banks wrote:
>> Ted Lilley wrote:
>> 
>> 
>>>Unfortunately, it doesn't work.  It seems the closure keeps track of
>>>the variable fed to it dynamically - if the variable changes after
>>  [...]
>>>
>>>At least, that's the explanation I'm deducing from this behavior.
>> 
>> 
>> And that's the correct explanation, chief.
>
>> 
>> It is intended that way.  As an example of why that is: consider a
>> nested function called "printvars()" that you could insert in various
>> places within a function to print out the value of some local variable.
>>  If you did that, you wouldn't want printvars to print the values at
>> the time it was bound, would you?
>
> Allow me to disagree (and start a new "confused with closures" thread:)
>
> We know that python does not have references to variables. To some
> newcomers this may seem annoying but eventually they understand the
> pythonic way and they do without them. But in the case of closures
> python supports references!
>
> Nested functions, seem to do two independent things:
>    1) reference variables of an outer local scoope
>    2) are functions bound dynamically to constants
>
> These two are independent because in:
> ##############
> def foo():
>      def nested():
>           print x
>      f = nested
>      x = 'sassad'
>      f()
>      x = 'aafdss'
>      f()
>      return f
> ##################
>
> once foo() returns there is no way to modify 'x'!
> It becomes a kind of constant.

In this particular case yes. But not in general, what about
this:

>>> def F():
...   l = []
...   def pop():
...     return l.pop()
...   def push(e):
...     l.append(e)
...   return pop, push
... 
>>> pop, push = F()
>>> push(1)
>>> pop()
1
>>> push(2)
>>> push(3)
>>> pop()
3
>>> pop()
2

-- 
Antoon Pardon


From pu.news.001 at gmail.com  Sat Feb 26 17:53:10 2005
From: pu.news.001 at gmail.com (Patrick Useldinger)
Date: Sat, 26 Feb 2005 23:53:10 +0100
Subject: fdups: calling for beta testers
In-Reply-To: <1109451464.546948.174830@z14g2000cwz.googlegroups.com>
References: <421f97eb$1@news.vo.lu>
	<1109380525.262724.275780@g14g2000cwa.googlegroups.com>
	<422044b9$1@news.vo.lu>
	<1109451464.546948.174830@z14g2000cwz.googlegroups.com>
Message-ID: <4220fdd7$1@news.vo.lu>

John Machin wrote:

> Yes. Moreover, "WinZip", the most popular archive-handler, doesn't grok
> bzip2.

I've added a zip file. It was made in Linux with the zip command-line 
tool, the man pages say it's compatible with the Windows zip tools. I 
have also added .py extentions to the 2 programs. I did however not use 
distutils, because I'm not sure it is really adapted to module-less scripts.

> You should consider a fall-back method to be used in this case and in
> the case of too many files for your 1Mb (default) buffer pool. BTW 1Mb
> seems tiny; desktop PCs come with 512MB standard these days, and Bill
> does leave a bit more than 1MB available for applications.

I've added it to the TODO list.

> The question was rhetorical. Your irony detector must be on the fritz.
> :-)

I always find it hard to detect irony by mail with people I do not know. ..

>>Did you actually run it on your
>>Windows box?
> 
> 
> Yes, with trepidation, after carefully reading the source. It detected
> some highly plausible duplicates, which I haven't verified yet.

I would have been reluctant too. But I've tested it intensively, and 
there's strictly no statement that actually alters the file system.

Thanks for your feedback!

-pu


From LionKimbro at gmail.com  Fri Feb 18 17:31:18 2005
From: LionKimbro at gmail.com (Lion Kimbro)
Date: 18 Feb 2005 14:31:18 -0800
Subject: unicode and socket
References: <1108753426.318777.275250@c13g2000cwb.googlegroups.com>
Message-ID: <1108765878.215091.176130@z14g2000cwz.googlegroups.com>

You probably want to use UTF-16 or UTF-8 on both sides of the socket.

See http://www.python.org/moin/Unicode for more information.

So, we have a Unicode string...
>>> mystring=u'eggs and ham'
>>> mystring
u'eggs and ham'

Now, we want to send it over:
>>> to_send=mystring.encode('utf-8')
>>> to_send
'eggs and ham'

It's encoded in UTF-8 now.

On the other side, (result=to_send,) we decode:

>>> result=received.decode('utf-8')
>>> result
u'eggs and ham'

You have transfered a unicode string. {:)}=



From mt at 3planes.com  Tue Feb  1 11:05:34 2005
From: mt at 3planes.com (Michael Tobis)
Date: 1 Feb 2005 08:05:34 -0800
Subject: variable declaration
In-Reply-To: <mailman.1679.1107241098.22381.python-list@python.org>
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1107213835.138613.117620@c13g2000cwb.googlegroups.com>
	<mailman.1679.1107241098.22381.python-list@python.org>
Message-ID: <1107273587.759441.22650@f14g2000cwb.googlegroups.com>

Given the behavior, the documentation is gratifyingly correct.

Given that the syntax is legal, though, the behavior is not what one
would intuitively expect, and is therefore unPythonic by (rather
dramatically) violating the principle of least surprise.

It's also, to me, understandable why it's difficult for the language
design to avoid this behavior.

This little discovery of mine sheds some considerable light on the
awkwardness of what you guys will deign to call "declarations". This
being the case, I can understand the resistance to "declarations" in
Python.

I had thought, until the current conversation and this experiment, that
the globals statement, er, declaration was just another executable,
especially given all the stress on Python's being purely executable.

I still see "global" and "@" as expressions of the same fundamental
problem, even though decorators are not implemented as declarations.
They both take effect in a non-intuitive sequence and they both affect
the reference rather than the referent.

This points out the problem that Python has in qualifying references
rather than referents.

Since BDFL is contemplating some optional typing, does this also imply
qualifying the references?

Maybe you wizard types can agree that there is a useful abstraction
that I'm talking about here, whether you wish to call it "declarations"
or not, and try to factor out some sort of consistent strategy for
dealing with it, perhaps in P3K. (I will try to be in a position to
help someday, but I have a long way to go.)

Language features that modify references rather than referents appear
to be problematic. Python clearly chafes at these. Yet there are at
least a few compelling reasons to want them. 

--
mt



From rkern at ucsd.edu  Mon Feb 14 05:46:09 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 14 Feb 2005 02:46:09 -0800
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cupupa$kfs$2@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr>
Message-ID: <cupvhi$c15$1@news1.ucsd.edu>

Ilias Lazaridis wrote:
> David Fraser wrote:
> 
>> Ilias Lazaridis wrote:
> 
> [...]
> 
>> Just to add to all the other answers:
>>
>> Don't just complain, submit patches and work at keeping them 
>> maintained. If this is done for a while it may be more of an argument 
>> for having them included
> 
> 
> I do not "just complain".
> 
> I've spend already hours with writing down the questionaire [which you 
> have successfully ignored].

Why don't you spend hours writing code and submitting working patches, 
instead? That's what I did years ago in the original effort to get mingw 
to compile Python extensions (one of the, woefully out-dated, web-pages 
you cite is mine. I have now edited it to clarify the situation so 
others do not come away from it as you did).

Just writing "questionnaires" *is* actually "just complaining."

The answer to most of your questions is, "Because no one has yet 
volunteered their time and effort to get the job done."

If this is important to you, you need to step up yourself and get it 
done and not expect other people to volunteer their unpaid time to 
satisfy your whims.

The open source Python community is driven by volunteerism, not a sense 
of entitlement. If this does not appeal to you, then perhaps the Python 
community is not the right one for you.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From deetsNOSPAM at web.de  Wed Feb  2 04:30:25 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 02 Feb 2005 10:30:25 +0100
Subject: Python Code Auditing Tool
References: <pan.2005.02.02.05.47.52.827795@flaminglunchbox.net>
	<7xhdkvbjab.fsf@ruckus.brouhaha.com>
	<pan.2005.02.02.06.14.14.516276@flaminglunchbox.net>
Message-ID: <36bko9F4mft0dU1@individual.net>

> I suppose that I am willing to lessen my expectations from _all_ to most.
> ;-) Regarding your example I could also do:
> 
>     if something():
>         def nothing(): return 0
>     else:
>         def nothing(): return 1
> 
> But this doesn't stop IDEs from attempting to do auto-completion.  I'm not
> trying to find hidden exceptions... just trying to easily get an idea of
> what could go wrong on each line of code.

There is AFAIK only one language that this can de accomplished - java, and
that's because of these checked exceptions of theirs. But checked
exceptions are considered harmful:

http://www.gcek.net/ref/books/sw/ooad/tip/#_Toc41169682

I totally agree with that - in java, I tend to throw SystemExceptions to rid
myself of endless try/catch clauses that obscure the real problem.

So - there is no way of knowing this. The only thing I can think of is to
keep some docs around that specify what exceptions to be expected, and that
tool of yours could try and see if it can identify a function/method by
name and notify you of the possible exceptions thrown. Might actually work
out quite well for the standardlib, if one does the work for annotating all
functions/methods properly.

-- 
Regards,

Diez B. Roggisch


From aleaxit at yahoo.com  Sun Feb  6 17:36:07 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 6 Feb 2005 23:36:07 +0100
Subject: Confused with methods
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<TL-dneoHycPA35vfRVn-qQ@rogers.com>
	<mailman.2027.1107713399.22381.python-list@python.org>
Message-ID: <1grl578.1rmaukw1yyw0g4N%aleaxit@yahoo.com>

jfj <jfj at freemail.gr> wrote:

> If I say:
> 
> x=b.foo
> x(1)
> 
> Then, without looking at the previous code, one can say that "x" is a
> function which takes one argument.

One can say whatever one wishes, but saying it does not make it true.

One can say that x is a green frog, but that's false: x is a
boundmethod.

One can say that x is a function, but that's false: x is a boundmethod.

One can say that x is a spade, but that's false: x is a boundmethod.


You can call green frogs (with a suitable whistling), you can call
functions, and you can call a spade (a spade).  The fact that they're
all callable (since you can call them), and a boundmethod is also
callable, does not necessarily make them equivalent to each other, nor
any of them equivalent to a boundmethod, in any other way whatsoever.


Alex


From danb_83 at yahoo.com  Fri Feb 11 03:03:52 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 11 Feb 2005 00:03:52 -0800
Subject: goto, cls, wait commands
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
	<1108075277.078837.106170@o13g2000cwo.googlegroups.com>
Message-ID: <1108109032.304717.140300@c13g2000cwb.googlegroups.com>

Harlin wrote:
> No goto needed. If this makes no sense (which it may not if all
you've
> been exposed to is BASIC) it wouldn't be a bad idea to Google why you
> should never use a goto statement.

"GOTO" isn't even needed in QBasic (except for "ON ERROR GOTO").



From gurpreet.sachdeva at gmail.com  Wed Feb  2 13:43:05 2005
From: gurpreet.sachdeva at gmail.com (Gurpreet Sachdeva)
Date: Thu, 3 Feb 2005 00:13:05 +0530
Subject: Two classes problem
Message-ID: <a3cc95f005020210435396de12@mail.gmail.com>

I have two classes;

a.py -->

#!/usr/bin/python
global test
test =''
class a(b):
        def __init__(self,test):
                print test
print 'Outside: '+test

b.py -->

#!/usr/bin/python
import a
a.a('Garry')

I want to pass this string (or any object later) to a.py and that too
outside the scope of class a.
Is that possible??? If yes, how???

Thanks,

Garry


From spam at nospam.org  Fri Feb 11 20:56:22 2005
From: spam at nospam.org (Erik Johnson)
Date: Fri, 11 Feb 2005 18:56:22 -0700
Subject: PHP session equivalent?
Message-ID: <420d6010$1@nntp.zianet.com>


    There are a lot of things about PHP I was not too keen on and hence why
my company is primarily doing Python these days, but one thing I was quite
impressed with was the ease with which it provided session functionality...

<?php

    session_start();
    session_register['my_var'];

    $my_var = "whatever";

?>

    And then in another CGI script do basically the same thing and get the
value of $my_var back. Setting of a session ID cookie happens automagically.
This is quite handy and simple.

    I don't think it's quite so simple in Python (which is not to say I
think PHP is better than Python). Doing a little extra work is no big deal,
but could someone be so kind as to lay out what needs to be done for a
Python CGI script to get essentially the same functionality? Are there
Python modules that implement a lot of this already?

    We are currently running under an Apache server (on SuSE Linux 8.2). I'm
not clear on whether some session functionality is provided there? We may be
moving to Zope before too long (trying to find some time to evaluate it), so
a method that is not strictly dependent on Apache would be preferable (in
the short term that may suffice).

Thanks for taking the time to read my post! :)

-ej




From just at xs4all.nl  Thu Feb  3 10:42:41 2005
From: just at xs4all.nl (Just)
Date: Thu, 03 Feb 2005 16:42:41 +0100
Subject: Hey, get this!
References: <mailman.1509.1106923923.22381.python-list@python.org>
	<ctdlpq$ukf$00$1@news.t-online.com>
	<k%WKd.98003$Jk5.87621@lakeread01> <4200E5CB.6020508@holdenweb.com>
	<s9z4qgvrpaj.fsf@salmakis.intevation.de>
	<s9zr7jx213w.fsf@salmakis.intevation.de>
	<just-9045B1.15374303022005@news1.news.xs4all.nl>
	<42023B66.9020309@holdenweb.com>
Message-ID: <just-E82529.16424103022005@news1.news.xs4all.nl>

In article <42023B66.9020309 at holdenweb.com>,
 Steve Holden <steve at holdenweb.com> wrote:

> > If it's a path importer, it could be a cookie, specific to the importer. 
> > I think in Steve's case initializing __path__ to ["*db*"] should work.
> > 
> > Just
> 
> And that's exactly the conclusion I came to when import of the package's 
> submodules didn't work as anticipated.
> 
> Coming to the question of writing a customer importer from the 
> documentation I discovered there is a huge amount of layered cruft in 
> the import scheme going all the way back to the days of the "ni" module. 
> It took me two aborted attempts just to realize I should be using PEP 
> 302 and not ihooks or some wrapper around __import__().

Yes. PEP 302 came about when I tried to reimplement PEP 273 (zip import) 
in a "sane" way ("saner" is probably as far as I got...).

Import is indeed very confusing, especially because of packages. I tried 
to convince Guido at some point to simplfy package imports by getting 
rid of __path__ altogether (and then simply search for 
"packagename/submodule.py" on sys.path) but he disliked the idea of 
widening submodule imports that much. On the other hand, __path__ is a 
mutable list so people can get the same effect by adding stuff to it.

> While this may be interesting history it's very confusing, and I'm 
> encouraging Alex Martelli to describe the current PEP-302-based scheme a 
> little more fully in his forthcoming revision to the Nutshell. The PEP 
> is just a little terse in places, I feel.

Yeah, it's a PEP, not official documentation, but since there isn't any 
official documentation, all you've got is the PEP :(

> I'm also wondering if the inspect module shouldn't have a facility to 
> hook into custom importers, since its code is pretty much filestore 
> based at present. This should probably be via an *optional* API to avoid 
> breakage in existing custom importers.

Probably.

Just


From steven.bethard at gmail.com  Wed Feb 16 14:39:30 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 16 Feb 2005 12:39:30 -0700
Subject: Test for structure
In-Reply-To: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
References: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
Message-ID: <Q5idne-AU8PsPI7fRVn-3A@comcast.com>

alex wrote:
> So how can I test if a variable 'a' is either a single character string
> or a list?

py> def test(x):
...     return (isinstance(x, list) or
...             isinstance(x, basestring) and len(x) == 1)
...
py> test('a')
True
py> test('ab')
False
py> test([])
True
py> test(['a', 'b'])
True

But definitely read Simon Brunning's post - you probably don't actually 
want to do this test.  Why do you think you want to test this?  What's 
your use case?

STeVe


From tim.golden at viacom-outdoor.co.uk  Mon Feb 28 06:09:31 2005
From: tim.golden at viacom-outdoor.co.uk (Tim G)
Date: 28 Feb 2005 03:09:31 -0800
Subject: simple input that can understand special keys?
In-Reply-To: <mailman.3114.1109486792.22381.python-list@python.org>
References: <mailman.3114.1109486792.22381.python-list@python.org>
Message-ID: <1109588970.963645.187330@g14g2000cwa.googlegroups.com>

Gabriel B. wrote:
> i'm writting an application that will use Tinker in a newer future.
> Now it's console only. I simply ommit some data on the display,
> print() some other and go on. The problem is that i can't test the
> actions tiggered by special keys, like Page Up/Down or the F1...12
>
> Right now i'm using raw_input() since even the Tk version will have
> only one input place, and for debuging i'm literally writting pageup,
> pagedow and the F's. But i want to put it in test while i write the
> GUI.
>
> is there any hope for me? I wanted to stay only with the console for
> now. And it's windows by the way :)
>
> Thanks

This is a notoriously un-cross-platform sort of issue.
Don't know about Tk, but for Windows, you could
use one of the existing console/curses packages:

Chris Gonnerman's WConIO:
http://newcenturycomputers.net/projects/wconio.html

The effbot's console module:
http://effbot.org/zone/console-index.htm

or a Win32 curses port:
http://flangy.com/dev/python/curses/

or you could splash out a bit and go for Pygame,
which gives you pretty much complete control over
pretty much everything:
http://pygame.org

or you could use the part-of-the-batteries mscvrt
module:
http://www.python.org/doc/2.4/lib/msvcrt-console.html


TJG



From uche.ogbuji at gmail.com  Mon Feb 28 22:03:16 2005
From: uche.ogbuji at gmail.com (uche.ogbuji at gmail.com)
Date: 28 Feb 2005 19:03:16 -0800
Subject: best XSLT processor?
In-Reply-To: <mailman.3135.1109595858.22381.python-list@python.org>
References: <yvgUd.9678$_G.5042@clgrps12>
	<mailman.3135.1109595858.22381.python-list@python.org>
Message-ID: <1109646196.351284.77630@z14g2000cwz.googlegroups.com>

Xalan is certainly faster, but it is almost certainly not more
compliant than 4Suite.  Xalan actually has a bit of a reputation among
XSLT processors in its carelessness with compliance.  But I suppoose in
order to settle these counter-claims, one of us will have to come up
with specific compliance examples.  You fired the first shot.  Can you
back it up?

--Uche



From jerf at jerf.org  Wed Feb  2 11:56:13 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Wed, 02 Feb 2005 11:56:13 -0500
Subject: Apache & Python 500 Error
References: <36bkqfF4sjt0oU1@individual.net>
Message-ID: <pan.2005.02.02.16.56.13.530859@jerf.org>

On Wed, 02 Feb 2005 10:28:46 +0100, Christian wrote:

> Hello,
> 
> i have an apache 1.3 server with python on debian. Python works fine but
>   the scripts wont?t work.

I know what your problem is.

But first, check your apache error log. Then you will know what your error
is, too.

If you can't fix it after you try to fix the error in the log, or you
don't understand the log entry, post your program and all relevant log
entries. You did good posting your Apache configuration, but we also need
the log entries.

That said, fuzzyman is right, but keep this in mind for future help
requests.


From ericjardim at gmail.com  Wed Feb 23 13:14:53 2005
From: ericjardim at gmail.com (Eric Jardim)
Date: 23 Feb 2005 10:14:53 -0800
Subject: PyQt and Python 2.4 - also WinXP LnF?
In-Reply-To: <1108065099.593832.314470@f14g2000cwb.googlegroups.com>
References: <1108003471.242829.297030@o13g2000cwo.googlegroups.com>
	<mailman.2295.1108027117.22381.python-list@python.org>
	<1108065099.593832.314470@f14g2000cwb.googlegroups.com>
Message-ID: <1109182493.199194.33270@l41g2000cwc.googlegroups.com>

Simon John - Feb 10, 11:51 am:
> I've just read the Qt4 GPL for Windows will only support gcc (and
maybe
> MinGW) anyway, not BCC or VisualC++ (or it's free equivalents), so it
> looks like it would be a daunting task to actually build PyQt....

Why? I think that it is fair. Why a Free Software developer should buy
VC++ licenses to build free Qt? It is nonsense. "gcc" works under
Windows, and that is enough.


> I guess a lot of this licensing crap will change when Qt4 GPL is
> actually released, but it's still looking like commercial Qt is the
> only "easy" way to go, and the Trolls are just making a "difficult"
GPL
> version to shut people up!

What is the matter with you? When Qt is released GPL for Windows, with
the support from Trolltech, if they do not  give you a ".exe" version
of Qt, then someone should compile it. There is no need to compile it
every time.

I think Trolltech is right. If can afford Windows and VisualStudio, you
can also afford Qt. Or maybe you are a "pirate".



From adykes at panix.com  Fri Feb  4 08:48:12 2005
From: adykes at panix.com (Al Dykes)
Date: 4 Feb 2005 08:48:12 -0500
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<kavad2-59d.ln1@eskimo.tundraware.com>
Message-ID: <ctvues$kvd$1@panix5.panix.com>

In article <kavad2-59d.ln1 at eskimo.tundraware.com>,
Tim Daneliuk  <tundra at tundraware.com> wrote:
>Paul Rubin wrote:
>
><SNIP>
>
>> I've only worked on one serious site of this type and it was "SAJO"
>> (Solaris Apache Java Oracle) rather than LAMP, but the concepts are
>> the same.  I just feel like something bogus has to be going on.  I
>> think even sites like Slashdot handle fewer TPS than a 1960's airline
>> reservation that ran on hardware with a fraction of the power of one
>> of today's laptops.
>
>I worked for an Airline computer reservation system (CRS) for almost a
>decade. There is nothing about today's laptops that remotely comes close
>to the power of those CRS systems, even the old ones. CRS systems are
>optimized for extremely high performance I/O and use an operating system
>(TPF) specifically designed for high-performance transaction processing.
>
>Web servers are very sessions oriented: make a connection-pass the unit
>of work-drop the connection. This is inherently slow (and not how high
>performance TP is done). Moreover, really high perfomance requires a
>very fine level of I/O tuning on the server - at the CRS I worked for,
>they performance people actually only populated part of the hard drives
>to minimize head seeks.
>
>The point is that *everything* has to be tuned for high performance
>TP - the OS, the language constructs (we used assembler for most things),
>the protocols, and the overall architecture.  THis is why, IMHO,
>things like SOAP a laughable - RPC is a poor foundation for reliable,
>durable, and high-performance TP.  It might be fine for sending an
>order or invoice now and then, but sustained throughput of the sort
>I think of as "high" performance is likely never going to be accomplished
>with session-oriented architectures.
>
>For a good overview of TP design, see Jim Gray's book, "Transaction Processing:
>Concepts and Techniques".
>
>P.S. AFAIK the first CRS systems of any note came into being in the 1970s not
>      the 1960s, but I may be incorrect in the matter.
>-- 
>----------------------------------------------------------------------------
>Tim Daneliuk     tundra at tundraware.com
>PGP Key:         http://www.tundraware.com/PGP/




My recollection is that online reservations were in use ca. 1970, and I
know that the operating system was called ACP, renamed to TPF.
Googleing for that finds that online reservation systems stared in the
50's and ran on 7000 gear in the 60's.  

http://www.blackbeard.com/tpf/Sabre_off_TPF/some_highlights_from_sabre_history.htm

I was in banking in th 80's. I recall that circa 1990 hitting 1000 DB
trans/sec was the holy grail on a million $ mainframe.  My bank bought
what was called "the last TPF sale" about 1991.  It was used as a
"message router" to conect transactions from thousands ATMs and
teller stations to the right backend system necessary to make a bank
merger work.  


-- 

a d y k e s @ p a n i x . c o m 

Don't blame me. I voted for Gore.


From lars-www at lycos.com  Sun Feb 13 12:03:17 2005
From: lars-www at lycos.com (Lars)
Date: 13 Feb 2005 09:03:17 -0800
Subject: goto, cls, wait commands
In-Reply-To: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
Message-ID: <1108314197.673122.71250@c13g2000cwb.googlegroups.com>

You sir are a troll for sure. QBasic?! When was the last time you did
any programming, 1989?  Gave me a laugh though.

Lars



From brent.hughes at comcast.net  Mon Feb 28 13:51:31 2005
From: brent.hughes at comcast.net (Brent W. Hughes)
Date: Mon, 28 Feb 2005 11:51:31 -0700
Subject: Pythonwin: Red squiggley underline and syntax error
Message-ID: <juadnQtUmsOo9b7fRVn-tQ@comcast.com>

I copied and pasted some text into my Python code and then Pythowin put a 
red squiggley underline under the two tabs at the beginning of the line. 
What does that mean?  I've tried various things including deleting the white 
space in front of the line and reinserting the tabs.  I've also tried 
retyping the entire line.  Sometimes, I can get the red line to go away but 
when I try to run the program, it gives me a syntax error on the line that 
had the red underline.  Help!

Brent




From fuzzyman at gmail.com  Mon Feb 14 04:55:38 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 14 Feb 2005 01:55:38 -0800
Subject: saving a text file
In-Reply-To: <mailman.2514.1108368515.22381.python-list@python.org>
References: <mailman.2514.1108368515.22381.python-list@python.org>
Message-ID: <1108374938.594311.279670@l41g2000cwc.googlegroups.com>

Hmmm...... I can't guess what format you will create the 'tables' in,
or what format you want to save them in. You need the pyserial module
to read data from the serial port - I assume you have already
discovered that ?

Writing a text file to disc is *extremely* trivial....   Turning a
table - (list ?) - into a single string for writing to file is also
*extremely* trivial....

Are you familiar with the basic python data types, built-in functions,
and string methods ?

If not - please try the Python tutorial at www.python.org - it won't be
very long before you can do this. If your real problem is more
difficult (i.e. related to pyserial or choosing a data format) then
please provide more details.

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From ncoghlan at iinet.net.au  Tue Feb  1 22:07:01 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Wed, 02 Feb 2005 13:07:01 +1000
Subject: a sequence question
In-Reply-To: <MpmdnV3CyoAeumLcRVn-2g@comcast.com>
References: <lzrKd.138680$K7.56500@news-server.bigpond.net.au>	<Xns95EC9DCBC6294duncanrcpcouk@127.0.0.1>	<mailman.1553.1106960946.22381.python-list@python.org>
	<MpmdnV3CyoAeumLcRVn-2g@comcast.com>
Message-ID: <420043D5.60803@iinet.net.au>

Steven Bethard wrote:
> I think you can write that second one so that it works for iterables 
> without a __len__:
> 
> py> def padded_partition(iterable, part_len, pad_val=None):
> ...     itr = itertools.chain(
> ...         iter(iterable), itertools.repeat(pad_val, part_len - 1))
> ...     return itertools.izip(*[itr]*part_len)
> ...
> py> list(padded_partition(itertools.islice(itertools.count(), 10), 2))
> [(0, 1), (2, 3), (4, 5), (6, 7), (8, 9)]
> py> list(padded_partition(itertools.islice(itertools.count(), 10), 3))
> [(0, 1, 2), (3, 4, 5), (6, 7, 8), (9, None, None)]
> 
> I just unconditionally pad the iterable with 1 less than the partition 
> size...  I think that works right, but I haven't tested it any more than 
> what's shown.

I think you're right - I was looking at padding unconditionally, but because I 
was padding with the actual partition length, it didn't work correctly when the 
padding wasn't needed.

Padding with one less than the partition length fixes that quite neatly.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From paddy3118 at netscape.net  Wed Feb 23 14:32:51 2005
From: paddy3118 at netscape.net (Paddy)
Date: 23 Feb 2005 11:32:51 -0800
Subject: On eval and its substitution of globals
References: <1108828170.372593.150790@g14g2000cwa.googlegroups.com>
	<1109136736.670038.236040@z14g2000cwz.googlegroups.com>
	<421c7423$1_1@newspeer2.tds.net>
Message-ID: <1109187171.586056.216950@l41g2000cwc.googlegroups.com>

Thanks Kent for your reply.
I had to do as you suggest but I was thinking either it was a kludge,
and there should be a 'deep' substitution of globals, or that there was
a good reason for it to work as it does and some magician would tell
me.
Oh, the third reason could be that it was first implimented that way
and no-one has submitted a patch of course.

Could someone clue me in?

Ta,  Paddy.



From jerf at jerf.org  Thu Feb  3 18:27:58 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 03 Feb 2005 18:27:58 -0500
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
References: <ctsjmg$75p$1@usenet.otenet.gr>
	<pan.2005.02.03.19.10.39.349763@jerf.org>
	<ueCMd.22177$Ck1.1629547@news20.bellglobal.com>
Message-ID: <pan.2005.02.03.23.27.58.418172@jerf.org>

On Thu, 03 Feb 2005 22:46:24 -0500, Markus Wankus wrote:
> I realize your admirable intentions and the fact that you are simply 
> trying to help (the beauty of this community), but I beg you all 
> now...PLEASE...do not feed this troll.  Any responses to his posts will 
> simply snowball into the biggest waste of time and energy this newsgroup 
> has ever seen.    I'll let Google fill in the rest of the picture.  You 
> can decide whether or not you want to respond to his posts.

Actually, based on the web pages I had already been thinking that from
this point on out I'd only cover highly specific questions about actual
code; you can smell that in the last paragraph, and the general theme that
what you want exists but you're going to have to put it together yourself.

Thanks for the warning, though.


From zerdna1 at yahoo.com  Wed Feb  9 19:28:50 2005
From: zerdna1 at yahoo.com (Andre)
Date: Wed, 9 Feb 2005 19:28:50 -0500
Subject: Help: retrieving e-mail from yahoo pop server. what's wrong?
References: <q6idnUufKYXN8pffRVn-pA@rcn.net>
	<1107983472.417329.292750@l41g2000cwc.googlegroups.com>
Message-ID: <SPudnZsg_LtcN5ffRVn-iQ@rcn.net>

Thank, Kartic

I actually tried doing it with several other accounts, notably mail.com and
netscape.com
When i do it with netscape the dialog goes like the following:

>>> POPHOST = 'pop3.isp.netscape.com'
>>> pop = poplib.POP3(POPHOST)
>>> POPUSER = "myusername"
>>> pop.user(POPUSER)
'+OK'
>>> pop.pass_("mypassword")
Traceback (most recent call last):
  File "<pyshell#5>", line 1, in ?
    pop.pass_("123456")
  File "D:\Python24\lib\poplib.py", line 202, in pass_
    return self._shortcmd('PASS %s' % pswd)
  File "D:\Python24\lib\poplib.py", line 165, in _shortcmd
    return self._getresp()
  File "D:\Python24\lib\poplib.py", line 141, in _getresp
    raise error_proto(resp)
error_proto: -ERR invalid username or password

The username and password are naturally valid, but something else is wrong.
Do you know if Netscape also doesn't allow POP access? Is there a free
e-mail provider who does?
Thanks a mil,

Andre

"Kartic" <kartic.krishnamurthy at gmail.com> wrote in message
news:1107983472.417329.292750 at l41g2000cwc.googlegroups.com...
> Andre,
>
> Do you have a premium Yahoo account? Only premium users can access
> Yahoo mail via POP3. If you are a premium account holder and it still
> is not working, print out your password to see if you typed the correct
> password.
>
> Have you tried accessing your Yahoo from an email client? Does that
> work?
>
> Thanks,
> -Kartic
>




From grahamd at dscpl.com.au  Mon Feb 21 05:40:16 2005
From: grahamd at dscpl.com.au (grahamd at dscpl.com.au)
Date: 21 Feb 2005 02:40:16 -0800
Subject: Moving to Python from PHP - 3 questions
References: <mailman.2873.1108931203.22381.python-list@python.org>
Message-ID: <1108982416.634106.293180@f14g2000cwb.googlegroups.com>


Michal Migurski wrote:
> 3) Structured request variables. PHP has a really handy feature where

> request variables with name like "foo[]", "foo[bar]", or
> "foo[bar][baz]" are automatically structured into nested associative
> arrays. I can see that the python cgi module will make a list of
> MiniFieldStorage objects when more than one variable with the same
name

Someone already piped in by suggesting Vampire for mod_python, so
would add that Vampire supports structured form variables by making
use of:

  http://svn.colorstudy.com/trunk/Validator/validator/variabledecode.py

Thus, if you follow the form naming conventions this code supports,
then data can be turned into lists and dictionaries as appropriate. The
only thing is the naming convention is different to what you list
above.
Read the comments in linked code to see what it does actually use.



From http  Mon Feb 14 23:25:41 2005
From: http (Paul Rubin)
Date: 14 Feb 2005 20:25:41 -0800
Subject: newbie question convert C to python
References: <1108440952.526232.234130@c13g2000cwb.googlegroups.com>
Message-ID: <7xr7jixxdm.fsf@ruckus.brouhaha.com>

doodle4 at gmail.com writes:
> How do i handle this piece of code in python:
> 
> # define vZero 15
> # define vOne  20
> 
> unsigned int vTable[Zero][One]
> 
> if(vGroup[vZero][vOne] == 0)
>     {
>          vGroup[vZero][vOne]--
>          .....
>          .....
>     }

Simplest might be with a dictionary:

vGroup = {}    # I assume you meant vGroup not vTable
if vGroup[(vZero, vOne)] == 0:
   vGroup[(vZero, vOne)] -= 1
   .....
   .....


From danperl at rogers.com  Tue Feb  1 18:59:18 2005
From: danperl at rogers.com (Dan Perl)
Date: Tue, 1 Feb 2005 18:59:18 -0500
Subject: [perl-python] string pattern matching
References: <1107290707.549792.199860@c13g2000cwb.googlegroups.com>
	<mailman.1716.1107300060.22381.python-list@python.org>
Message-ID: <2uWdnWyp5M1Fip3fRVn-sQ@rogers.com>

Perhaps someone will write a program to automatically follow up on every 
[perl-python] posting?  The follow-up could just contain a statement like 
the one Daniel mentions.  Obviously the program would be written in python. 
;-)

Any suggestions on how to implement such a program?  How would it detect a 
new posting?  How would it send the follow-up?

Anyway, I agree with Daniel and I think that would not only warn newcomers 
to the group, but it would also allow many of us to move on without worrying 
about the effect that the perl-python postings may have on these newcomers.

BTW, I think Daniel's suggestion for the statement sounds pretty fair and 
pretty impartial.  Maybe it should just not use terms like "blatant".  And I 
would include something like "we support everyone's freedom to post to this 
newsgroup but we feel that python and perl beginners need to be warned about 
the quality of these tutorials".

Dan

"Daniel Fackrell" <unlearned at gmail.com> wrote in message 
news:mailman.1716.1107300060.22381.python-list at python.org...
> Perhaps a message to the effect of "These messages are specifically 
> disowned
> by the groups to which they are posted, have historically been riddled 
> with
> blatant errors, and are assumed to continue in the same quality." should 
> be
> posted as a follow-up to each of these messages by XL in order to avoid
> having to spend the time to find the inaccuracies in each one 
> individually.
>
> Considering the response so far, a list of frequent posters and
> not-so-frequent posters who will vouch for the accuracy of the disclaimer
> might even be added.
>
> Daniel Fackrell
>
>
> 




From fredrik at pythonware.com  Fri Feb 18 13:24:10 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 18 Feb 2005 19:24:10 +0100
Subject: unicode encoding usablilty problem
References: <opsmekm2ei6yt6e7@news.cisco.com>
Message-ID: <cv5bm1$acv$1@sea.gmane.org>

anonymous coward <aurora00 at gmail.com> wrote:

> This brings up another issue. Most references and books focus exclusive on  entering unicode 
> literal and using the encode/decode methods. The fallacy  is that string is such a basic data type 
> use throughout the program, you  really don't want to make a individual decision everytime when 
> you use  string (and take a penalty for any negligence). The Java has a much more  usable model 
> with unicode used internally and encoding/decoding decision  only need twice when dealing with 
> input and output.

that's how you should do things in Python too, of course.  a unicode string
uses unicode internally. decode on the way in, encode on the way out, and
things just work.

the fact that you can mess things up by mixing unicode strings with binary
strings doesn't mean that you have to mix unicode strings with binary strings
in your program.

> Even for those who choose to use unicode, it is almost impossible  to ensure their program work 
> correctly.

well, if you use unicode the way it was intended to, it just works.

</F> 





From fredrik at pythonware.com  Fri Feb  4 02:44:10 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 4 Feb 2005 08:44:10 +0100
Subject: Awkwardness of C API for making tuples
References: <dave.opstad-E4D4C4.07281701022005@reader0900.news.uu.net><1107289261.185768.116790@f14g2000cwb.googlegroups.com>	<pRhMd.6933$i6.60496@nasal.pacific.net.au><mailman.1799.1107417054.22381.python-list@python.org>
	<M6pMd.102686$Jk5.100791@lakeread01>
Message-ID: <ctv92d$d3g$1@sea.gmane.org>

Steve Holden wrote:

>> in theory, if PyInt_FromLong succeeds, and PyTuple_SetItem fails, you'll leak
>> an object.
>
> And in practice this will only happen during a period when you are relying critically on it *not* 
> to ...

yeah, but if PyTuple_SetItem fails in this case, you better move that
computer out of the radiation chamber.

</F> 





From mauriceling at acm.org  Sun Feb 13 08:41:02 2005
From: mauriceling at acm.org (Maurice LING)
Date: Sun, 13 Feb 2005 21:41:02 +0800
Subject: Considering python - have a few questions.
In-Reply-To: <eZAPd.21496$Ka6.148459@news1.mts.net>
References: <eZAPd.21496$Ka6.148459@news1.mts.net>
Message-ID: <420f58d7$1@news.starhub.net.sg>

Hi,

I feel that you have a consideration if Python is suitable from the 
perspective that you hadn't programmed for a long time. Assuming that 
you had been convinced that Python is a suitable language in terms of 
functionalities you need, please allow me to ensure that Python is 
simple enough to learn. So please do not let your apparent "lack of 
programming experiences" be a mental hinderance to your progress.

Cheers
Maurice


From tzot at sil-tec.gr  Thu Feb 10 17:41:02 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Fri, 11 Feb 2005 00:41:02 +0200
Subject: Python and version control
References: <XNrOd.1657$Mw3.72@amstwist00>
	<avOdnSfqFtw2z5ffRVn-1w@powergate.ca>
Message-ID: <tnon01pqep6idn81mhhrtjf8an1p07ut3p@4ax.com>

On Wed, 09 Feb 2005 13:13:01 -0500, rumours say that Peter Hansen
<peter at engcorp.com> might have written:

>BTW, as a general caution: while Visual Source Safe may be
>"easy", it's also dangerous and has been known to corrupt
>many a code base, mine included.  I wouldn't touch the product
>with a virtual ten-foot pole

Are you sure you got the acronym right?-)  It seems that VSS provides viRTual
source-safety...
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From administrata at hotmail.com  Mon Feb 14 16:54:54 2005
From: administrata at hotmail.com (administrata)
Date: 14 Feb 2005 13:54:54 -0800
Subject: [NooB] a Variable in multiple quotes...
References: <614c778e.0502130204.5824cddf@posting.google.com>
	<378onnF5aoj75U1@individual.net>
Message-ID: <614c778e.0502141354.53d6675b@posting.google.com>

Leif K-Brooks <eurleif at ecritters.biz> wrote in message news:<378onnF5aoj75U1 at individual.net>...
> administrata wrote:
> > Is it possible? 
> > 
> > I tried...
> > 
> > I = "John"
> > print \
> > """
> > I used to love pizza"""
> > 
> > 
> > Error occurs!!!
> 
> No error occurs; it prints "I used to love pizza", as would be expected.
> 
> Oh: from the subject line, I'm guessing that you want it to say "John 
> used to love pizza" instead? In that case, try doing this:
> 
> I = "John"
> print "%s used to love pizza" % I

How can I do it with several variables?

About 10 or more...

HELP plz :)


From bac at OCF.Berkeley.EDU  Mon Feb 28 22:18:20 2005
From: bac at OCF.Berkeley.EDU (Brett C)
Date: Mon, 28 Feb 2005 19:18:20 -0800
Subject: python-dev Summary for 2005-01-16 through 2005-01-31
Message-ID: <4223DEFC.3050101@ocf.berkeley.edu>

=====================
Summary Announcements
=====================

-----------------------------------------
School sure likes to destroy my free time
-----------------------------------------

A month late, that much closer to having this hectic quarter being over.  Sorry 
for being so delinquent with this summary but school has kept me busy and 
obviously the Real World has to take precedence over volunteer work.  Now if I 
could only get paid for doing this... =)

And if you hate the summaries being late, you could do it yourself.  This is 
not meant to be a flippant comment!  I am always willing to hand over 
development of the summaries to anyone who is willing to do a comparable job. 
If you are interested feel free to email me.  I have now made this a permanent 
offer in the header in case someone comes along later and decides they want to 
do this.


----------------------
RSS feed now available
----------------------

Thanks entirely to one of my predecessors, A.M. Kuchling, the python-dev 
Summaries are available as an `RSS feed`_.  The feed contains the titles of 
every summary and so will be updated with the newest summaries as soon as they 
are posted online.  A full text feed will eventually be available.


----------
New format
----------

I have done a thorough restructuring of the boilerplate and the Summary 
Announcements section for the Summaries.  The purpose of this is to make 
finding information in the boilerplate much easier.  It also keeps consistency 
by sectioning off everything as in the Summary section.

The other reason is for the ``contents`` directive in reST_.  This will provide 
a more thorough table of contents for the web version of the summary at the 
very top of the summaries.  This will allow people to jump directly to the 
section of the Summary they care about the most.  Obviously this perk only 
exists in the HTML version.

Lastly, the typical boilerplate for each Summary has now been moved to the 
bottom.  This was at the request of a regular reader who I would like to keep 
happy.  =)  It also seems reasonable since once you have read through it once 
chances are you are not going to read it again so might as well move it out of 
the way.

Then again I could be totally wrong about all of this and manage to alienate 
every person who reads the summaries regularly.  =)




=======
Summary
=======

---------------------
Python 2.3.5 released
---------------------

Consider how late this summary is I bet you already knew Python 2.3.5 was 
already out the door.  =)

With Python 2.4 out in the world this means there is a very high probability 
2.3.6 will never exist and this marks the end of the 2.3 branch.

Contributing threads:
   - `2.3.5 delayed til next week 
<http://mail.python.org/pipermail/python-dev/2005-January/051140.html>`__
   - `2.3 BRANCH FREEZE imminent! 
<http://mail.python.org/pipermail/python-dev/2005-January/051277.html>`__
   - `RELEASED Python 2.3.5, release candidate 1 
<http://mail.python.org/pipermail/python-dev/2005-January/051304.html>`__


------------------------------------------------------
Making magic type conversion methods act like __str__
------------------------------------------------------

Walter D?rwald discovered that when you subclass 'unicode' and call unicode() 
on an instance of the subclass it will not call the implementation of 
__unicode__ of the subclass but instead will call unicode.__unicode__ .  When 
in the same scenario with strings, though, str() calls the subclass' __str__ 
method.  Turns out 'int' and 'float' act like 'unicode' while 'complex' acts 
like 'str'.

So who is right?  Docs say 'str' is wrong, but this is mainly an artifact of 
pre-2.2 inability to subclass types.  Turns out 'str' is acting properly. 
`Patch #1109424`_ implements the proper semantics and will eventually go in for 
2.5 (won't touch 2.4 since it is a semantic change).

.. _Patch #1109424: http://www.python.org/sf/1109424

Contributing threads:
   - `__str__ vs. __unicode__ 
<http://mail.python.org/pipermail/python-dev/2005-January/051175.html>`__


---------------------------------------------
Speeding up function calls to C API functions
---------------------------------------------

Neal Norwitz posted the patch found at http://www.python.org/sf/1107887 to help 
with function calls to C code.  The idea is to expand the family of values used 
in PyMethodDef.ml_flags for argument types to include specifying the number of 
minimum and maximum number of arguments.  This can provide a speedup by 
allowing the eval loop to unpack everything in the C stack and skip packing 
arguments in a tuple.

But not everyone was sure it was worth the extra need to specify all of this 
for functions.  Regardless of that and any other objections this would be more 
of a Python 3000 thing.

Which also led to a quick shift in topic to how Python 3.0 will be developed. 
Guido said it would be piece-meal.  Read 
http://joelonsoftware.com/articles/fog0000000069.html for why.

Contributing threads:
   - `Speed up function calls 
<http://mail.python.org/pipermail/python-dev/2005-January/051251.html>`__
   - `Moving towards Python 3.0 
<http://mail.python.org/pipermail/python-dev/2005-January/051355.html>`__


------------------------------------------------------------
How to handle memory allocation with the presence of threads
------------------------------------------------------------

Evan Jones has been working on a patch to allow the garbage collector to free 
up memory of small objects.  This led him to ask questions in terms of memory 
usage in the face of threading at the C level.  While the GIL usually needs to 
be held for any operation that touches Python code, he was not sure if this 
held for the memory API.

Tim Peters clarified all of this by pointing out the documentation in the C API 
manual about the GIL.  In a nutshell the memory API is not exempt from needing 
to hold the GIL, so hold it.

It was also pointed out there was a bunch of code to allow people to mix usage 
of PyMem_* functions with PyObject_* functions.  That was purely done for 
backwards-compatibility back in the day.  Mixing these two APIs for memory is 
very bad.  Don't do it!

Contributing threads:
   - `Improving the Python Memory Allocator 
<http://mail.python.org/pipermail/python-dev/2005-January/051255.html>`__
   - `Python Interpreter Thread Safety? 
<http://mail.python.org/pipermail/python-dev/2005-January/051335.html>`__


--------------------------
Slicing iterators rejected
--------------------------

Nick Coghlan proposed allowing iterators to be sliced liked other sequence 
types.  That way something like ``enumerate("ABCD")[1:]`` would work.

But Guido rejected it.  With itertools.islice existence it does not provide new 
functionality.  Plus "Iterators are for single sequential access" according to 
Guido, and thus should not be confused with sequences.

Contributing threads:
   - `Allowing slicing of iterators 
<http://mail.python.org/pipermail/python-dev/2005-January/051257.html>`__


===============
Skipped Threads
===============

- redux: fractional seconds in strptime
- how to test behavior wrt an extension type?
- Strange segfault in Python threads and linux kernel 2.6
- Unix line endings required for PyRun* breaking embedded Python
- Zen of Python
- PyCon: The Spam Continues ;-)
- Patch review: [ 1094542 ] add Bunch type to collections module



========
Epilogue
========

------------
Introduction
------------

This is a summary of traffic on the `python-dev mailing list`_ from
January 16, 2005 through January 31, 2005.
It is intended to inform the wider Python community of on-going
developments on the list on a semi-monthly basis.  An archive_ of
previous summaries is available online.

An `RSS feed`_ of the titles of the summaries is available.
You can also watch comp.lang.python or comp.lang.python.announce for
new summaries (or through their email gateways of python-list or
python-announce, respectively, as found at http://mail.python.org).

This is the fifty-seventh summary written by Brett Cannon (grad schools are 
actually crazy enough to accept me  =).

To contact me, please send email to brett at python.org.  Do *not*
post to comp.lang.python if you wish to reach me.

The `Python Software Foundation`_ is the non-profit organization that
holds the intellectual property for Python.  It also tries to advance
the development and use of Python.  If you find the python-dev Summary
helpful please consider making a donation.  You can make a donation at
http://python.org/psf/donations.html .  Every penny helps so even a
small donation with a credit card, check, or by PayPal helps.

If you are looking for a way to expand your knowledge of Python's
development and inner-workings, consider writing the python-dev
Summaries yourself!  I am willing to hand over the reins to someone
who is willing to do a comparable or better job of writing the
Summaries.  If you are interested, please email me at
brett at python.org.


--------------------
Commenting on Topics
--------------------

To comment on anything mentioned here, just post to
`comp.lang.python`_ (or email python-list at python.org which is a
gateway to the newsgroup) with a subject line mentioning what you are
discussing.  All python-dev members are interested in seeing ideas
discussed by the community, so don't hesitate to take a stance on
something.  And if all of this really interests you then get involved
and join `python-dev`_!


-------------------------
How to Read the Summaries
-------------------------

The in-development version of the documentation for Python can be
found at http://www.python.org/dev/doc/devel/ and should be used when
looking up any documentation for new code; otherwise use the current
documentation as found at http://docs.python.org/ .  PEPs (Python
Enhancement Proposals) are located at http://www.python.org/peps/ .
To view files in the Python CVS online, go to
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/python/ .  Reported
bugs and suggested patches can be found at the SourceForge_ project
page.

Please note that this summary is written using reStructuredText_.
Any unfamiliar punctuation is probably markup for reST_ (otherwise it
is probably regular expression syntax or a typo =); you can safely
ignore it.  I do suggest learning reST, though; it's simple and is
accepted for `PEP markup`_ and can be turned into many different
formats like HTML and LaTeX.  Unfortunately, even though reST is
standardized, the wonders of programs that like to reformat text do
not allow me to guarantee you will be able to run the text version of
this summary through Docutils_ as-is unless it is from the
`original text file`_.

.. _python-dev: http://www.python.org/dev/
.. _SourceForge: http://sourceforge.net/tracker/?group_id=5470
.. _python-dev mailing list: http://mail.python.org/mailman/listinfo/python-dev
.. _comp.lang.python: http://groups.google.com/groups?q=comp.lang.python
.. _PEP Markup: http://www.python.org/peps/pep-0012.html

.. _Docutils: http://docutils.sf.net/
.. _reST:
.. _reStructuredText: http://docutils.sf.net/rst.html
.. _PSF:
.. _Python Software Foundation: http://python.org/psf/

.. _last summary: http://www.python.org/dev/summary/2005-01-01_2005-01-15.html
.. _original text file: http://www.python.org/dev/summary/2005-01-16_2005-01-31.ht
.. _archive: http://www.python.org/dev/summary/
.. _RSS feed: http://www.python.org/dev/summary/channews.rdf



From gdamjan at gmail.com  Mon Feb  7 18:53:15 2005
From: gdamjan at gmail.com (Damjan)
Date: Tue, 08 Feb 2005 00:53:15 +0100
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<4207E843.7070403@swiftdsl.com.au>
Message-ID: <36qdbbF3bo8s9U1@individual.net>

> Isn't this just the same thing with a different spin. There was always
> an available distribution for linux for non-commercial use. Windows was
> always the problem. You still can't use it for windows without knowing
> how to compile the thing on windows.
 
There'll be people that know how to compile :), and they'll be able to
release & distibute binaries... Previously you couldn't even compile the
GPL QT on windows, since it lacks the low-level win32 api calls that do all
the work.

-- 
damjan


From ed at leafe.com  Fri Feb 11 22:07:22 2005
From: ed at leafe.com (Ed Leafe)
Date: Fri, 11 Feb 2005 22:07:22 -0500
Subject: connecting to Sybase/MsSQL from python
In-Reply-To: <OJcPd.4065$aW6.3986@newssvr22.news.prodigy.net>
References: <OJcPd.4065$aW6.3986@newssvr22.news.prodigy.net>
Message-ID: <8cf8c817269a8dad42fba2111ed4a8c5@leafe.com>

On Feb 11, 2005, at 8:12 PM, John Fabiani wrote:

> So is there a kind sole out there that can help with instructions on 
> what is
> needed to get python talking to MsSQL.

	Has anyone ever used this product: 
http://www.object-craft.com.au/projects/mssql/

	Any feedback, positive or negative?

      ___/
     /
    __/
   /
  ____/
  Ed Leafe
  http://leafe.com/
  http://dabodev.com/
  Come to PyCon!!!!  http://www.python.org/pycon/2005/



From steven.bethard at gmail.com  Fri Feb  4 12:48:44 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 04 Feb 2005 10:48:44 -0700
Subject: returning True, False or None
Message-ID: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>

I have lists containing values that are all either True, False or None, 
e.g.:

     [True,  None,  None,  False]
     [None,  False, False, None ]
     [False, True,  True,  True ]
     etc.

For a given list:
* If all values are None, the function should return None.
* If at least one value is True, the function should return True.
* Otherwise, the function should return False.

Right now, my code looks like:

     if True in lst:
         return True
     elif False in lst:
         return False
     else:
         return None

This has a light code smell for me though -- can anyone see a simpler 
way of writing this?

STeVe


From deetsNOSPAM at web.de  Mon Feb 14 05:59:49 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 14 Feb 2005 11:59:49 +0100
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108370491.792820.142200@z14g2000cwz.googlegroups.com>
	<cuprg2$6rt$1@usenet.otenet.gr> <37bcdkF5bg7knU1@individual.net>
	<cupumi$kfs$1@usenet.otenet.gr>
Message-ID: <37bel6F59jvkgU1@individual.net>

>> Where does that requirement come from? If you want to create large
>> scale apps, the price for a msvc++ compiler shouldn't matter. And:
>> Windows is a non-free platform at first. If you have to or want to
>> develop on top of it, be prepared to pay. Its as simple as that. If
>> you want something cheaper - you'll have to put some effort into it.
>> Or use linux.
> 
> I will not go into this 'twisting' games.

Because it renders your point moot?

> the requirement "Use of an open-source tool-chain" is nothing special.

There is a OS-tool-chain supported on windows, cygwin. 

> MinGW is not "every imaginable platform/compliler".

Certainly not - but its one more dependency on an otherwise perfectly
working platform. Now why should there be any need to introduce this
dependency, if not a wide communitity desire is behind it - which seems not
to be the case. And recently, MS released a free version of its compiler.
I'm not sure if that's working for python - but if not, I think it would be
the more important thing to support on _windows_.

> I'm not intrested in creating an distribution.

Obviously nobody else is. 

> 
> I provide an analysis of the situation, context: newcomer, disapointed
> from JAVA.

That doesn't belong here. You don't get points for not liking java. And
beside that: I don't like it too, but if I have to use it because my
requirements analysis shows that it is the tool for the job - I use it.
Hopefully with jython somewhere. 

So if you find that missing mingw support renders python useless for you,
don't use it. But that would only be the case if you _actually_ create an
extension - something  I personally haven't the need for. And I developed
quite large python apps.

>>> c) Why are the following efforts not _directly_ included in the
>>> python source code base?
>>> 
>>> http://jove.prohosting.com/iwave/ipython/pyMinGW.html

Ask the author of the patch. We can't read minds here.

-- 
Regards,

Diez B. Roggisch


From mahs at telcopartners.com  Fri Feb 25 14:58:17 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 25 Feb 2005 11:58:17 -0800
Subject: Converting HTML to ASCII
In-Reply-To: <20050225185147.43095.qmail@web20703.mail.yahoo.com>
References: <20050225185147.43095.qmail@web20703.mail.yahoo.com>
Message-ID: <cvnvou$b6o$1@sea.gmane.org>

gf gf wrote:
> [wants to extract ASCII from badly-formed HTML and thinks BeautifulSoup is too complex]

You haven't specified what you mean by "extracting" ASCII, but I'll assume that 
you want to start by eliminating html tags and comments, which is easy enough 
with a couple of regular expressions:

  >>> import re
  >>> comments = re.compile('<!--.*?-->', re.DOTALL)
  >>> tags = re.compile('<.*?>', re.DOTALL)
  ...
  >>> def striptags(text):
  ...     text = re.sub(comments,'', text)
  ...     text = re.sub(tags,'', text)
  ...     return text
  ...
  >>> def collapsenewlines(text):
  ...     return "\n".join(line for line in text.splitlines() if line)
  ...
  >>> import urllib2
  >>> f = urllib2.urlopen('http://www.python.org/')
  >>> source = f.read()
  >>> text = collapsenewlines(striptags(source))
  >>>

This will of course fail if there is a "<" without a ">", probably in other 
cases too.  But it is indifferent to whether the html is well-formed.

This leaves you with the additional task of substituting the html escaped 
characters e.g., "&nbsp;", not all of which will have ASCII representations.

HTH

Michael





From jerf at jerf.org  Thu Feb 10 12:14:22 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 10 Feb 2005 12:14:22 -0500
Subject: namespaces module (a.k.a. bunch, struct, generic object,
	etc.) PEP
References: <GaudndOHLML3M5bfRVn-vg@comcast.com>
	<pan.2005.02.10.15.10.26.594432@jerf.org>
	<tdidnQsgbbTiW5bfRVn-pA@comcast.com>
Message-ID: <pan.2005.02.10.17.14.21.836748@jerf.org>

On Thu, 10 Feb 2005 13:39:29 -0700, Steven Bethard wrote:
> Yeah, I guess that was really the motivation of this module.  I 
> personally wouldn't use it all that often -- certainly not with the 
> frequency that I use, say, Python 2.4's set type -- but I think there 
> are enough of us out here who have written essentially the same module 
> enough times that it merits a little bit of standardization and addition 
> to the standard library.

If it expands past what was basically a slight elaboration on

class Bunch: pass

to actually do real work, I'd be much more impressed, as long as simple
things stay simple. A hierarchy-aware get might be a good start:

>>> config = Namespace()
>>> myParm = config.get("myapp.wrapping.line", constants.STRICT)
>>> someParms = config.get("myapp.settings.printer", Namespace())

which would create the necessary namespaces or something.


From martin at v.loewis.de  Tue Feb 22 01:51:33 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 22 Feb 2005 07:51:33 +0100
Subject: UTF-8 / German,
 Scandinavian letters - is it really this difficult??
 Linux & Windows XP
In-Reply-To: <cve1vh$c37$1@phys-news1.kolumbus.fi>
References: <cve1vh$c37$1@phys-news1.kolumbus.fi>
Message-ID: <421ad676$0$4903$9b622d9e@news.freenet.de>

Mike Dee wrote:
> If I have this in the beginning of my Python script in Linux:
> 
> #!/usr/bin/env python
> # -*- coding: UTF-8 -*-
> 
> should I - or should I not - be able to use non-ASCII characters 
> in strings and in Tk GUI button labels and GUI window titles and in 
> raw_input data without Python returning wrong case in manipulated 
> strings and/or gibberished characters in Tk GUI title? 

If you use byte strings, you should expect moji-bake. The coding
declaration primarily affects Unicode literals, and has little
effect on byte string literals. So try putting a "u" in front
of each such string.

> With non-ASCII characters I mean ( ISO-8859-1 ??) stuff like the 
> German / Swedish / Finnish / etc "umlauted" letter A  (= a diaresis; 
> that is an 'A' with two dots above it, or an O with two dots above.)

You explicitly requested that these characters are *not* ISO-8859-1,
by saying that you want them as UTF-8. The LATIN CAPITAL LETTER A WITH
DIAERESIS can be encoded in many different character sets, e.g.
ISO-8859-15, windows1252, UTF-8, UTF-16, euc-jp, T.101, ...

In different encodings, different byte sequences are used to represent
the same character. If you pass a byte string to Tk, it does not know
which encoding you meant to use (this is known in the Python source,
but lost on the way to Tk). So it guesses ISO-8859-1; this guess is
wrong because it really is UTF-8 in your case.

OTOH, if you use a Unicode string, it is very clear what internal
representation each character has.

> How would you go about making a script where a) the user types in any text 
> (that might or might not include umlauted characters) and b) that text then 
> gets uppercased, lowercased or "titled" and c) printed? 

Use Unicode.

> Isn't it enough to have that 'UTF-8 encoding declaration' in the beginning,
> and then just like get the user's raw_input, mangle it about with .title() 
> or some such tool, and then just spit it out with a print statement?

No.

> One can hardly expect the users to type characters like unicode('\xc3\
> xa4\xc3\xb6\xc3\xbc', 'utf-8')u'\xe4\xf6\xfc' u"???".encode('utf-8') or 
> whatnot, and encode & decode to and fro till the cows come home just to 
> get a letter or two in their name to show up correctly. 

This is not necessary.

> Am I beyond hope?

Perhaps not. You should, however, familiarize yourself with the notion
of character encodings, and how the same character can have different
byte represenations, and the same byte representation can have different
interpretations as a character. If libraries disagree on how to
interpret bytes as characters, you get moji-bake (ghost characters;
a Japanese term for the problem, as Japanese users are familiar with
the problem for a long time)

The Python Unicode type solves these problems for good, but you
need to use it correctly.

Regards,
Martin


From mahs at telcopartners.com  Sat Feb 12 16:05:47 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sat, 12 Feb 2005 13:05:47 -0800
Subject: Hack with os.walk()
In-Reply-To: <200502120000.12086.frans.englich@telia.com>
References: <200502120000.12086.frans.englich@telia.com>
Message-ID: <culqu5$582$1@sea.gmane.org>

Frans Englich wrote:
> Hello,
> 
> Have a look at this recursive function:
> 
> def walkDirectory( directory, element ):
> 
>     element = element.newChild( None, "directory", None ) # automatically 
> appends to parent
>     element.setProp( "name", os.path.basename(directory))
> 
>     for root, dirs, files in os.walk( directory ):
> 
>         for fileName in files:
>             element.addChild( parseFile( os.path.join( root, fileName ))
> 
>         for dirName in filter( acceptDirectory, dirs):
>             walkDirectory( os.path.join( root, dirName ), element )
> 
>         return ### Note, this is inside for loop
> 
> What it does, is it recurses through all directories, and, with libxml2's 
> bindings, builds an XML document which maps directly to the file hierarchy. 
> For every file is parseFile() called, which returns a "file element" which is 
> appended; the resulting structure looks the way one expect -- like a GUI tree 
> view.
> 
> The current code works, but I find it hackish, and it probably is inefficient, 
> considering that os.walk() is not called once(as it usually is), but for 
> every directory level.
> 
> My problem, AFAICT, with using os.walk() the usual way, is that in order to 
> construct the /hierarchial/ XML document, I need to be aware of the directory 
> depth, and a recursive function handles that nicely; os.walk() simply 
> concentrates on figuring out paths to all files in a directory, AFAICT.
> 
> I guess I could solve it with using os.walk() in a traditional way, by somehow 
> pushing libxml2 nodes on a stack, after keeping track of the directory levels 
> etc(string parsing..). Or, one could write ones own recursive directory 
> parser..
> 
> My question is: what is the least ugly? What is the /proper/ solution for my 
> problem? How would you write it in the cleanest way?
> 
> 
> Cheers,
> 
> 		Frans
> 
The path module by Jorendorff: http://www.jorendorff.com/articles/python/path/

wraps various os functions into an interface that can make this sort of thing 
cleaner

Michael



From johnfabel at btinternet.com  Sat Feb 19 19:30:13 2005
From: johnfabel at btinternet.com (John Abel)
Date: Sun, 20 Feb 2005 00:30:13 +0000
Subject: Annoying Socket Problem
In-Reply-To: <42160575.1000008@pa.press.net>
References: <mailman.2797.1108737330.22381.python-list@python.org>
	<42160090$0$28988$e4fe514c@news.xs4all.nl>
	<42160575.1000008@pa.press.net>
Message-ID: <969d22ac727fe67fea5397abdc5b47e1@btinternet.com>

Never mind, sorted now.

On 18 Feb 2005, at 15:10, John Abel wrote:

> Read/tried that before posting.  Even with a flush, everything hangs  
> until I kill the client.
>
> Irmen de Jong wrote:
>
>> John Abel wrote:
>>
>>> I'm hoping this is something simple, and someone can point me in the  
>>> right direction here.  I have a class based on SocketServer  
>>> (ThreadingTCPServer), and I've used makefile on the socket so I use  
>>> the "for in " routine.  My client sends it a small amount of data.   
>>> However, both programs appear to hang once the data has been sent,  
>>> obviously something to do with flushing.
>>
>>
>> http://www.amk.ca/python/howto/sockets/ 
>> sockets.html#SECTION000400000000000000000
>>
>> --Irmen
>
>
> -- 
> *John Abel
> Senior Unix Administrator*
> PA News Limited
> www.pa.press.net <http://www.pa.press.net>
> E-Mail address: john.abel at pa.press.net <mailto:john.abel at pa.press.net>
> Telephone Number : 01430 455553
> Fax Number : 0870 1240192
> Mobile Number : 07971 611356
> The Bishop's Manor, Market Place, Howden, DN14 7BL
> PA News Limited, 292 Vauxhall Bridge Road, London SW1V 1AE. Registered  
> in England No. 3891053.
> -- 
> http://mail.python.org/mailman/listinfo/python-list
>



From DrColombes at yahoo.com  Thu Feb 10 10:56:38 2005
From: DrColombes at yahoo.com (Dr. Colombes)
Date: 10 Feb 2005 07:56:38 -0800
Subject: Variable size plot symbols,
	variable hue plot colors in Python (MatPlotLib) ?
Message-ID: <1108050998.189066.201440@c13g2000cwb.googlegroups.com>

Using MatPlotLib plot function, is there a way to get variable size
plot symbols?  For example, using symbol strings like 'o' (circle), 's'
(square), 'x' (cross), etc., is there a way to specify other plot
symbols such a small circle, Medium square, LARGE cross, etc.?

Similarly, using the MatPlotLib plot function, is there a way to get
variable hue (RGB-specified) plot colors?  For example, using symbol
strings like 'b' (blue), 'g' (green), 'red' (red), etc., is there a way
to specify other colors such as light blue, dark green, pink, etc.?

Or perhaps is there some other Python MatPlotLib or other Python module
functions that allow variable size plot symbols and variable hue plot
colors in Python ?

Thank you for your suggestions.



From max at alcyone.com  Sun Feb 13 16:12:57 2005
From: max at alcyone.com (Erik Max Francis)
Date: Sun, 13 Feb 2005 13:12:57 -0800
Subject: For American numbers
In-Reply-To: <1108299336.079209.275420@c13g2000cwb.googlegroups.com>
References: <420e7376$1@nntp0.pdx.net><gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
	<slrnd0u8fd.c2l.nick@irishsea.home.craig-wood.com>
	<1108299336.079209.275420@c13g2000cwb.googlegroups.com>
Message-ID: <Uq-dnffn27FEX5LfRVn-ug@speakeasy.net>

Dan Bishop wrote:

> They must have gotten the idea from floppy disks, which also use a
> 1024000-byte "megabyte".

It's pretty common industry-wide.  Memory is measured in binary prefixes 
(x 1024), but disk space and bandwidth are measured in decimal prefixes 
(x 1000).

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   I'm not worried about anything. I'm not fearing any man.
   -- Dr. Martin Luther King, Jr.


From R.Brodie at rl.ac.uk  Thu Feb 24 09:22:59 2005
From: R.Brodie at rl.ac.uk (Richard Brodie)
Date: Thu, 24 Feb 2005 14:22:59 -0000
Subject: Shift Confusion
References: <1109225214.430739.259600@l41g2000cwc.googlegroups.com>
	<u81r111a8v82rt2uqfqd5me0obbua40k2p@4ax.com>
Message-ID: <cvko04$hu9$1@blackmamba.itd.rl.ac.uk>


"John Machin" <sjmachin at lexicon.net> wrote in message
news:u81r111a8v82rt2uqfqd5me0obbua40k2p at 4ax.com...

> >Essentially, it should be possible to use a 'packed string' format in
> >Python, where as long as the characters you're sending are in the ASCII
> >range 0 to 127, two will fit in a byte.
>
> It should be possible, but only in a realm where phlogiston and
> perpetual motion machines exist.

alt.sys.pdp10 ?




From levub137 at wi.rr.com  Sat Feb 26 19:02:48 2005
From: levub137 at wi.rr.com (Raymond L. Buvel)
Date: Sun, 27 Feb 2005 00:02:48 GMT
Subject: any Python equivalent of Math::Polynomial::Solve?
In-Reply-To: <just-D38ED0.21594026022005@news1.news.xs4all.nl>
References: <just-420C1F.16423926022005@news1.news.xs4all.nl>
	<cvqgn5$n0b$1@e250.ripco.com>
	<just-8EF886.20462126022005@news1.news.xs4all.nl>
	<cvqmvt$2rm$1@e250.ripco.com>
	<just-D38ED0.21594026022005@news1.news.xs4all.nl>
Message-ID: <I68Ud.577$Cg6.256@twister.rdc-kc.rr.com>

Just wrote:
<snip>
> 
> SciPy indeed appear to contain a solver, but I'm currently stuck in 
> trying to _get_ it for my platform (OSX). I'm definitely not going to 
> install a Fortran compiler just to evaluate it (even though my name is 
> not "Ilias" ;-). Also, SciPy is _huge_, so maybe a Python translation of 
> that Fortran code or your Perl code will turn out to be more attractive 
> after all...
> 
> Just

The GNU Scientific Library has a nice root finder for polynomials with 
real coefficients.  I have wrapped this with Pyrex to work with my 
ratfun module see:

http://calcrpnpy.sourceforge.net/ratfun.html

If this will suit your needs, I can send you an alpha release of the 
package with the root finder.  It is not pure Python.  I requires Pyrex 
and a C compiler to install.  My guess is that it will work on OSX as 
well as it does on Linux.  This functionality will be included in the 
next release of the ratfun package but I still have to unit test a 
number of components and update the documentation.  Consequently, an 
official release will not happen soon.

Ray


From Serge.Orlov at gmail.com  Sun Feb 13 08:00:00 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: Sun, 13 Feb 2005 16:00:00 +0300
Subject: writing unicode apps in python - some beginner questions.
References: <hEAPd.12154$504.1040055@news20.bellglobal.com>
Message-ID: <cunj0g$2ro3$1@news.comcor-tv.ru>

WX wrote:
> (#2) Hindi is not displayed correctly on the screen when the
> "Suplemental language support" parts for Windows XP are not installed,
> in particular in the Regional and Languages  Options panel in the
> Control Panel, you have to check "Install files for complex script and
> right-to-left languages (including Thai)".  This adds Thai, and Indic
> language support.  Does anyone know a programmatic way in Python to
> check for this,so I can pop up a message telling users that support
> for this script hasn't been installed in Windows?

I suspect it's hidden in the windows registry. To find out where it's
hidden try the following:
1. Before installing supplemental language support export
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Nls
into a text file using regedit
2. Install supplemental language support
3. Export the same registry branch into another file and compare with
the first file.

If there are no changes try doing the same for other registry branches:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows
HKEY_LOCAL_MACHINE\SYSTEM\

After you find out what's going on you can use python's module
_winreg to read the registry from your python program. Good luck.

  Serge.

 




From __peter__ at web.de  Fri Feb 18 07:01:00 2005
From: __peter__ at web.de (Peter Otten)
Date: Fri, 18 Feb 2005 13:01:00 +0100
Subject: combining several lambda equations
References: <2ae25c6b.0502180224.3d6164a7@posting.google.com>
	<mailman.2794.1108722811.22381.python-list@python.org>
	<1108724265.565392.192590@c13g2000cwb.googlegroups.com>
Message-ID: <cv4ldh$2q4$04$1@news.t-online.com>

paddy3118 at netscape.net wrote:

> I actually have a set of lambdas so my use will be more like:

A set of lambdas gains you nothing.

>>> (lambda: a > 0) in set([lambda: a > 0])
False

is probably not what you expected. So you might want to go back to strings
containing expressions. Anyway, here is a way to "and" an arbitrary number
of functions (they all must take the same arguments):

>>> def make_and(*functions):
...     def all_true(*args, **kw):
...             for f in functions:
...                     if not f(*args, **kw):
...                             return False
...             return True
...     return all_true
...
>>> abc = make_and(lambda: a > 0, lambda: b < 0, lambda: c == 0)
>>> a, b, c = 1, -1, 0
>>> abc()
True
>>> c = 1
>>> abc()
False

For a set/list of lambdas/functions, you would call make_and() with a
preceding star:

and_all = make_and(*some_set_of_functions)

> - Gosh, isn't life fun!

I seem to remember that the manual clearly states otherwise :-)

Peter




From jjl at pobox.com  Sat Feb 12 08:40:49 2005
From: jjl at pobox.com (John J. Lee)
Date: 12 Feb 2005 13:40:49 +0000
Subject: Commerical graphing packages?
References: <420d1595$1@nntp.zianet.com>
	<1108163937.533683.162220@g14g2000cwa.googlegroups.com>
Message-ID: <87650x28wu.fsf@pobox.com>

18k11tm001 at sneakemail.com writes:

> Check out GRACE. It's not specifically designed for Python, but I've
> been using with Python for a couple of years or more. I'm very happy
> with it, and it's free. It works both interactively and in batch mode.
> Do a google on GRACE.

If you're generating lots of graphs programatically, eg. on a web
server, grace is not what you want.  Yes, it has a command language,
but IIRC it depends on X11, and windows even pop up as it runs in
batch mode.  Bleh.

Gets the job done for interactive editing of publication-quality
scientific graphs, though.


John


From dbickett at gmail.com  Sat Feb  5 13:53:41 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Sat, 5 Feb 2005 13:53:41 -0500
Subject: Alternative to standard C "for"
In-Reply-To: <1107628331.816935.16760@o13g2000cwo.googlegroups.com>
References: <1107628331.816935.16760@o13g2000cwo.googlegroups.com>
Message-ID: <1d6cdae305020510535ee2f194@mail.gmail.com>

adomas.paltanavicius at gmail.com wrote:
> Are there other good ways for this simple problem? Generators?

Very interesting problem :) That never occured to me.

To prevent python from loading that entire list into memory, one
could, as you suggested, use a generator:

>>> def genrange( start , stop , step = 1 ):
	while start < stop:
		yield start
		start += step
		
>>> for x in range( 5 ):
	print "%s " % str( x ),

0  1  2  3  4 

>>> for x in genrange( 0 , 5 ):
	print "%s " % str( x ),
	
0  1  2  3  4 

-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From dave at pythonapocrypha.com  Fri Feb  4 08:51:04 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Fri, 04 Feb 2005 06:51:04 -0700
Subject: OT: why are LAMP sites slow?
In-Reply-To: <ZzKMd.103062$Jk5.60987@lakeread01>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>	<mailman.1857.1107479377.22381.python-list@python.org>	<7xis59qgaz.fsf@ruckus.brouhaha.com>	<mailman.1864.1107490291.22381.python-list@python.org>	<7xvf99ndfx.fsf@ruckus.brouhaha.com>
	<ZzKMd.103062$Jk5.60987@lakeread01>
Message-ID: <42037DC8.6030303@pythonapocrypha.com>

Steve Holden wrote:
> Paul Rubin wrote:
> 
>> Skip Montanaro <skip at pobox.com> writes:
>>
>>> It's more than a bit unfair to compare Wikipedia with Ebay or
>>> Google.  Even though Wikipedia may be running on high-performance
>>> hardware, it's unlikely that they have anything like the underlying
>>> network structure (replication, connection speed, etc), total number
>>> of cpus or monetary resources to throw at the problem that both Ebay
>>> and Google have.  I suspect money trumps LAMP every time.
>>
>>
>>
>> I certainly agree about the money and hardware resource comparison,
>> which is why I thought the comparison with 1960's mainframes was
>> possibly more interesting.  You could not get anywhere near the
>> performance of today's servers back then, no matter how much money you
>> spent.  Re connectivity, I wonder what kind of network speed is
>> available to sites like Ebay that's not available to Jane Webmaster
>> with a colo rack at some random big ISP.  Also, you and Tim Danieliuk
>> both mentioned caching in the network (e.g. Akamai).  I'd be
>> interested to know exactly how that works and how much difference it
>> makes.
>>
> It works by distributing content across end-nodes distributed throughout 
> the infrastructure. I don't think Akamai make any secret of their 
> architecture, so Google (:-) can help you there.

They definitely didn't make it a secret - they patented it. The gist of their 
approach was to put web caches all over the place and then have their DNS 
servers resolve based on where the request was coming from - when your browser 
asks their DNS server where whatever.akamai.com is, they try to respond with a 
web cache that is topologically close.

> Of course it makes a huge difference, otherwise Google wouldn't have 
> registered their domain name as a CNAME for an Akamai node set.

Yes and no - web caching can be very beneficial. Web caching with Akamai may or 
may not be worth the price; their business was originally centered around the 
idea that quality bandwidth is expensive - while still true to a degree, prices 
have fallen a ton in the last few years and continue to fall.

And who knows what sort of concessions they made to win the Google contract (not 
saying that's bad, just realize that Akamai would probably even take a loss on 
the Google contract because having Google as a customer makes people conclude 
that their service must make a huge difference ;-) ).

-Dave


From peet.morris at comlab.ox.ac.uk  Mon Feb  7 12:20:00 2005
From: peet.morris at comlab.ox.ac.uk (peetm)
Date: Mon, 7 Feb 2005 17:20:00 -0000
Subject: Python Binary and Windows
Message-ID: <cu8805$emv$2@news.ox.ac.uk>

Hi.

I'd like to compile (?) the DiffLib Python code into a binary form that can
be called by other Windows apps - like, I'd like to compile it into a DLL.

Is this possible?

Many thanks!




From adijkstra at baandersconsultancy.nl  Tue Feb 22 05:06:03 2005
From: adijkstra at baandersconsultancy.nl (Arjen Dijkstra)
Date: Tue, 22 Feb 2005 11:06:03 +0100
Subject: executea string
In-Reply-To: <mailman.2923.1109063557.22381.python-list@python.org>
References: <mailman.2923.1109063557.22381.python-list@python.org>
Message-ID: <cvf06k$5ls$1@azure.qinip.net>

Groleo Marius wrote:
> I have the folowing code:
>  c=2
>  e=3
>  s="12"
>  code.append('funtion ("c, e,s")')
>  print "\n".join(code) + '\n'
> 
> The problem is when i call append.
> The variables s, c, e are not replaced with their value, so in the end
> i get the result:
> 
> funtion(" c, e, s");
> 
> The result that i want is :
> funtion("2,3,12");
> 
> 
> 

I don't know exactly what you want, but try this:

 >>> code.append('funtion ("%s, %s,%s")' % (c, e, s))
 >>> print "\n".join(code) + '\n'
funtion ("2, 3,12")


HTH,

Arjen


From jepler at unpythonic.net  Sat Feb 12 20:44:25 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Sat, 12 Feb 2005 19:44:25 -0600
Subject: Why Tk treat F10, F11, F12 diferently from F1...F9?
In-Reply-To: <5175a81c05021216415204de93@mail.gmail.com>
References: <5175a81c05021216415204de93@mail.gmail.com>
Message-ID: <20050213014425.GB24076@unpythonic.net>

The reason that F10 does nothing is because there is already a binding
on all for <F10>.  In Motif apps, F10 moves focus to the menu bar, like
pressing and releasing Alt does on Windows.  When there is a binding for
a key, the handling of the event "event add" never takes place.

If you want to get rid of this binding, you would do it with something
like
    w.bind_all("<F10>", "")
for some widget w.

I don't know why you see the "L1" and "L2" keysyms.  I don't on my
system (Fedora Core 2)

Jeff
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From ccjpb at shark.cse.bris.ac.uk  Tue Feb 22 07:38:12 2005
From: ccjpb at shark.cse.bris.ac.uk (JP. Baker)
Date: Tue, 22 Feb 2005 12:38:12 GMT
Subject: Sequence of empty lists
Message-ID: <ICBCFo.LG3@bath.ac.uk>

I give up (and have prepared myself for replies telling
me which search strings to use on Google etc)!

How *should* I create a sequence of N empty lists (buckets)?

I obviously can't use

a = [[]]*N

and I have found various solutions and am currently using

a = map(lambda x: [], range(N))

but can't help feeling that I have missed something obvious.

nhoJ
-- 
John P Baker


From john at grulic.org.ar  Tue Feb  1 10:24:00 2005
From: john at grulic.org.ar (John Lenton)
Date: Tue, 1 Feb 2005 12:24:00 -0300
Subject: import doesn't work as i want
In-Reply-To: <41fe5438$0$18865$8fcfb975@news.wanadoo.fr>
References: <41fe5438$0$18865$8fcfb975@news.wanadoo.fr>
Message-ID: <20050201152400.GB5205@grulic.org.ar>

On Mon, Jan 31, 2005 at 04:52:24PM +0100, Olivier Noblanc ATOUSOFT wrote:
> Hello,
> 
> In the botom of this post you will see my source code.
> 
> The problem is when i launch main.py that doesn't make anything why
> ?

I'm guessing you don't have an __init__.py in inc/

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
/* now make a new head in the exact same spot */
             -- Larry Wall in cons.c from the perl source code
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From raghulj at gmail.com  Tue Feb 22 00:10:46 2005
From: raghulj at gmail.com (Raghul)
Date: 21 Feb 2005 21:10:46 -0800
Subject: Copy functio in imaplib
Message-ID: <1109049046.015244.121070@l41g2000cwc.googlegroups.com>

What is message_set in the python documentation for copy in imaplib? Is
they referring message set  to the particular mail message in my inbox
or something else.

copy(  	message_set, new_mailbox)
    Copy message_set messages onto end of new_mailbox.



From mm at newsgroups.com  Mon Feb 14 17:26:59 2005
From: mm at newsgroups.com (MM)
Date: Tue, 15 Feb 2005 11:26:59 +1300
Subject: array of bits?
Message-ID: <cur7k9$4g7$1@lust.ihug.co.nz>

Hi,

What is the best structure/way to create an array of bits (actually 
true/false flags) of an arbitrary length ranging from about 20 upto 
about 500. Speed of access more of an issue than compactness.

eg:
[0] 0
[1] 0
[2] 1
[3] 0
[4] 1
...
[n] 0
etc.

Thanks for your input and advice. matthew.


From rjgruet at yahoo.com  Sat Feb 19 07:00:59 2005
From: rjgruet at yahoo.com (Richard Gruet)
Date: Sat, 19 Feb 2005 13:00:59 +0100
Subject: [ANN] Python 2.4 Quick Reference available
Message-ID: <cv79sj$mgk$1@aphrodite.grec.isp.9tel.net>

Hi Pythoners,

An updated version of the Python Quick Reference is available for Python 2.4
at http://rgruet.free.fr/#QuickRef.
It is a single looonnng html page (30 printed A4 pages) with a choice of 4
different CSS styles; also available in PDF.

Richard




From fredrik at pythonware.com  Sun Feb 13 03:05:35 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 13 Feb 2005 09:05:35 +0100
Subject: writing unicode apps in python - some beginner questions.
References: <hEAPd.12154$504.1040055@news20.bellglobal.com>
Message-ID: <cun1jr$4do$1@sea.gmane.org>

"WX" wrote:

> The character set I am using is the Hindi/Devanagari character set at
> unicode range U+901.)
>
> (#1) If I paste some unicode stuff from the clipboard into IDLE, it accepts it, but it can't 
> execute a PRINT command like this:
>
> >>> print u"?????? ??????"
> Unsupported characters in input
>
> Should I report this as a bug or is it an essential limitation of the Python console/immediate 
> mode?

I don't see why it couldn't be fixed, so feel free to report it to the bug tracker.

</F> 





From aleaxit at yahoo.com  Thu Feb 10 03:29:41 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Thu, 10 Feb 2005 09:29:41 +0100
Subject: empty classes as c structs?
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>
	<mailman.1973.1107618702.22381.python-list@python.org>
	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>
	<mailman.2006.1107658273.22381.python-list@python.org>
	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>
	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>
	<mailman.2049.1107750700.22381.python-list@python.org>
	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com>
	<4207606E.4040806@iinet.net.au> <cu8amb$ufa$1@sea.gmane.org>
	<mailman.2158.1107859833.22381.python-list@python.org>
	<1grnyld.1t8l5kw1nr5aqsN%aleaxit@yahoo.com>
	<E7CdnTFdo5S8AZffRVn-og@comcast.com>
	<1grqs37.1sjjd0b162e5z4N%aleaxit@yahoo.com>
	<H4ednd10C8QmP5ffRVn-tw@comcast.com>
Message-ID: <1grrgjh.ntgjzn167kxpyN%aleaxit@yahoo.com>

Steven Bethard <steven.bethard at gmail.com> wrote:

> I'm not sure how much _I_ like them... =) It makes me uneasy that
> 
>      del b.x
>      print b.x
> 
> doesn't throw an AttributeError.  OTOH, if you're using namespaces as
> the equivalent of nested scopes, deleting all 'x' attributes is probably
> not what you want...

Right.  Besides, you can easily get such effects today:

>>> b.x = 15
>>> print b.x
15
>>> del b.x
>>> print b.x
23
>>> del b.x
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: x


All you need is to have (e.g.) the following few lines before these:

>>> class B(object):
...   x = 23
... 
>>> b=B()


> I like the idea of chain, though, so I'll probably add the class with
> just __init__ and __getattribute__ to the current implementation.  I'm
> willing to be persuaded, of course, but for the moment, since I can see
> a few different options, I'm refusing the temptation to guess on the 
> "most natural" behavior for __delattr__ and __setattr__...  =)

That's probably best in terms of API.  Not too sure about the
implementation (why wouldn't __getattr__ suffice, holding the bunches in
an attribute with a magicname?) but that's a secondary issue.


Alex


From grante at visi.com  Thu Feb 10 13:31:21 2005
From: grante at visi.com (Grant Edwards)
Date: 10 Feb 2005 18:31:21 GMT
Subject: goto, cls, wait  commands
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
	<420b89f2$0$21601$a1866201@visi.com>
	<420ba000$0$29241$626a14ce@news.free.fr>
Message-ID: <420ba879$0$29513$a1866201@visi.com>

On 2005-02-10, Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote:
> Grant Edwards a ?crit :
>> On 2005-02-10, BOOGIEMAN <BOOGIEMANPN at YAHOO.COM> wrote:
>> 
>> 
>>>First of all, what's Python command equivalent to QBasic's "goto" ?
>> 
>> 
>> There isn't one.  
>> 
>> One defines functions and calls them. One uses for and while
>> loops.  One uses list comprehensions.  One uses if/elif/else.
>
> and even sometimes break, continue, and return !-)

I forgot to mention try/except.  When I do use goto in C
programming it's almost always to impliment what would have
been a try/except block in Python.

-- 
Grant Edwards                   grante             Yow!  ... the MYSTERIANS
                                  at               are in here with my
                               visi.com            CORDUROY SOAP DISH!!


From bvande at po-box.mcgill.ca  Sat Feb 19 05:34:10 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Sat, 19 Feb 2005 05:34:10 -0500
Subject: duplicate docstrings
In-Reply-To: <R5mdnTmEiaIop4vfRVn-hw@comcast.com>
References: <R5mdnTmEiaIop4vfRVn-hw@comcast.com>
Message-ID: <42171622.5000103@po-box.mcgill.ca>

Steven Bethard said unto the world upon 2005-02-18 13:58:
> I have two classes that implement the same interface, e.g. something like:
> 
> class C(object):
>     def foo(self):
>         """Foo things"""
>         ...
>     def bar(self):
>         """Bar things"""
>         ...
>     def baz(self):
>         """Baz things in a C manner"""
>         ...
> 
> class D(object):
>     def foo(self):
>         """Foo things"""
>         ...
>     def bar(self):
>         """Bar things"""
>         ...
>     def baz(self):
>         """Baz things in a D manner"""
>         ...
> 
> It bothers me that I'm basically writing the same docstrings multiple 
> times.  I guess what I really want to do is just write the docstrings 
> for the interface I'm describing, and only supply docstrings in the 
> classes when they need to differ from the interface docstrings.
> 
> Is there a good way to do this?  If it's necessary, I can have C and D 
> inherit from another class...
> 
> STeVe

Hi, I'm new to thinking in classes, and may not have understood your 
need. But does this help:

IDLE 1.1
 >>> class Spam:
	'''I'm a very spammy docstring'''
	pass

 >>> class Ham:
	__doc__ = Spam.__doc__

	
 >>> help(Ham)
Help on class Ham in module __main__:

class Ham
  |  I'm a very spammy docstring

 >>>

best,

Brian vdB



From peter at engcorp.com  Fri Feb 11 21:38:47 2005
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 11 Feb 2005 21:38:47 -0500
Subject: Alternative to raw_input ?
In-Reply-To: <ckkuclxhhrv7$.1lqqmenvnqvg5$.dlg@40tude.net>
References: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>
	<mailman.2400.1108139722.22381.python-list@python.org>
	<w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>
	<cuio9f$13k8$1@ns.felk.cvut.cz>
	<ckkuclxhhrv7$.1lqqmenvnqvg5$.dlg@40tude.net>
Message-ID: <MKSdnYiccMgv8ZDfRVn-hg@powergate.ca>

BOOGIEMAN wrote:
> On Fri, 11 Feb 2005 18:00:08 +0100, den wrote:
> 
> 
>>Did you try this:
>>
>>import msvcrt
>>msvcrt.getch()
> 
> 
> Yes, that's what I need. Thank you.
> BTW, sometimes program continues 
> without me pressing any button, why ? 

Probably because you had already hit a key earlier, and
it was still in the keyboard queue.

You can flush it first:

print prompt
while msvcrt.kbhit():
     msvcrt.getch()
msvcrt.getch()

Pack that up in a subroutine and call it when
you need to pause and continue only when the user
has seen your prompt.  Any previous keystrokes
will be discarded by the loop, then it will wait
for a new one to be hit.


-Peter


From efrat_regev at yahoo.com  Sun Feb 13 14:25:02 2005
From: efrat_regev at yahoo.com (Efrat Regev)
Date: Sun, 13 Feb 2005 13:25:02 -0600
Subject: Q: Portable Way to Make Files Read Only
Message-ID: <X4SdnT6W257MBJLfRVn-2Q@adelphia.com>

    Hello,

    I would like to recurse through a directory and make files (which match
a specific criteria) read only. From searching the Internet, I found
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/303343
    which shows how to change file attributes to read only using the
win32api module. That's great, but I was hoping there's a more portable way
to do so. Is there a more portable API call to make files read only?

    Many Thanks,

    Efrat




From tjreedy at udel.edu  Mon Feb  7 16:42:05 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 7 Feb 2005 16:42:05 -0500
Subject: Word for a non-iterator iterable?
References: <36lu1cF516qtdU1@individual.net>
	<cf052f0d.0502071110.4e9611e0@posting.google.com>
Message-ID: <cu8n90$b5b$1@sea.gmane.org>


"Oren Tirosh" <oren at REMOVETHIS1.hishome.net> wrote in message 
news:cf052f0d.0502071110.4e9611e0 at posting.google.com...
> But when iter() returns the same object - well, that's a
> sign that the object is definitely not reiterable.

Unless, of course, __iter__ resets the iteration variable to its starting 
value.  But it would definitely not be simultaneously doubly iterable, as 
one would want to compute a self crossproduct.  And one could object that 
such an __iter__ is not proper for an iterator (return self and do nothing 
else).  So such an __iter__ should better be written, perhap as a generator 
function, to return an independent object with independently initialized 
iteration variable.

Terry J. Reedy





From duncan.booth at invalid.invalid  Tue Feb  8 11:59:35 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 8 Feb 2005 16:59:35 GMT
Subject: pass named parameters to python
References: <4412dd31.0502080854.6d98223@posting.google.com>
Message-ID: <Xns95F7ACDAB909Eduncanrcpcouk@127.0.0.1>

John Leslie wrote:

> I am converting a korn shell script to python and want to be able to
> pass named arguments into python e.g -firstparam -secondparam
> 
> Can this be done?
> 

See the module 'optparse'.
http://www.python.org/doc/current/lib/module-optparse.html


From dannyant at kingkong.me.berkeley.edu  Tue Feb 22 18:23:37 2005
From: dannyant at kingkong.me.berkeley.edu (Danny)
Date: Tue, 22 Feb 2005 15:23:37 -0800
Subject: python tutorial/projects
Message-ID: <cvgf2o$u42$1@agate.berkeley.edu>

Does anyone know of a good python tutorial?
I was also looking for some non-trivial projects to do in python.


Basically I would like to claim on my resume, that I know python, with 
out bad karma.

Danny


From ilias at lazaridis.com  Tue Feb 15 14:33:10 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 21:33:10 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <421244f0$0$30339$636a15ce@news.free.fr>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr>
	<XX+64LRqnLECFwAV@objmedia.demon.co.uk>
	<cut6t9$sla$1@usenet.otenet.gr>
	<42123751$0$10042$626a14ce@news.free.fr>
	<cutem3$2t6$2@usenet.otenet.gr>
	<421244f0$0$30339$636a15ce@news.free.fr>
Message-ID: <cutipk$l5a$1@usenet.otenet.gr>

bruno modulix wrote:
> Ilias Lazaridis wrote:
>> bruno modulix wrote:
>>> Ilias Lazaridis wrote:
>>>
>>>> there are other reasons behind the decision to not support the MinGW 
>>>> open-source-complier directly out of the main source-code base.
>>>>
>>> Yes, of course. The reason is they are lying about their commitment 
>>> to open source. They are currently trying to port Python to .NET, and 
>>> when done they'll retire the current implementation and lock everyone 
>>> to a proprietary platform. I know it's hard to believe, but there are 
>>> clues...
>>
>> impressive.
>>
>> but things are much simpler.
> 
> Could you be more prolific ?

Please explain the word "prolific".

.

-- 
http://lazaridis.com


From martin at v.loewis.de  Sun Feb 13 17:06:51 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 13 Feb 2005 23:06:51 +0100
Subject: win32 extension install hiccup
In-Reply-To: <cuoh3s$87u$1@lust.ihug.co.nz>
References: <cuoh3s$87u$1@lust.ihug.co.nz>
Message-ID: <420fcf7b$0$8812$9b622d9e@news.freenet.de>

MM wrote:
> I downloaded the latest win32all build 202 and tried to install under 
> win2000 with Py2.4. Install complains about 'couldn't open py2.4 to run 
> script pywin32-preinstall.py'. I checked the directories and there was 
> no sign of this file (preinstall.py) so I presume this is why it bombed. 
> How do I fix this? 

Most likely, by not installing Python into a path that has spaces in it.

Regards,
Martin


From alan.mcintyre at esrgtech.com  Sat Feb  5 09:07:45 2005
From: alan.mcintyre at esrgtech.com (Alan McIntyre)
Date: Sat, 05 Feb 2005 09:07:45 -0500
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <1gribme.1b8vjvuz98jhkN%aleaxit@yahoo.com>
References: <dvOMd.33656$EG1.19314@lakeread04>
	<xqCdnQlfh-iEJ57fRVn-sw@comcast.com>
	<1gribme.1b8vjvuz98jhkN%aleaxit@yahoo.com>
Message-ID: <Sq4Nd.103635$Jk5.46996@lakeread01>

Alex,

Wow, that method turns out to be the fastest so far in a simple 
benchmark on Python2.3 (on my machine, of course, YMMV); it takes 14% 
less time than the one that I deemed most straightforward. :)

Thanks,
Alan

Alex Martelli wrote:
> Hmmmm, what role does the enumeration play here?  I don't see how you're
> using it, at all.  Why not just:
> 
> def collapse(iterable):
>     it = iter(iterable)
>     lastitem = it.next()
>     yield lastitem
>     for item in it:
>         if item != lastitem:
>             yield item
>             lastitem = item
> 
> that's basically just the same as your code but without the strangeness
> of making an enumerate for the purpose of ignoring what the enumerate
> adds to an ordinary iterator.
> 
> 
> Alex


From "kanenas\" at t comcast d.t net  Sat Feb 12 19:12:02 2005
From: "kanenas\" at t comcast d.t net (@t comcast d.t net)
Date: Sat, 12 Feb 2005 16:12:02 -0800
Subject: deepcopy chokes with TypeError on dynamically assigned instance
 method
In-Reply-To: <mailman.2379.1108120960.22381.python-list@python.org>
References: <698m01djeu9jqpnvvk64vmc488e5c026im@4ax.com>	<mn0o01hsaq59bg93cfoonej8ocjsnksgal@4ax.com>
	<mailman.2379.1108120960.22381.python-list@python.org>
Message-ID: <haCdnXB6cZOZBpPfRVn-1w@comcast.com>

On Fri, 11 Feb 2005 21:22:35 +1000, Nick Coghlan <ncoghlan at iinet.net.au> 
wrote:
 >
 >Interesting. The problem appears to be that bound methods are not 
copyable:
 >
Curiosity got the better of me and I started diggin about in copy.py. 
Turns out that return values of reductors for functions don't include a 
code object or global dict, and reductors for instancemethods don't 
return a function or instance, hence the complaint that instancemethod 
(or function, as below) didn't get enough arguments.

  >>> f = Foo('foo')
  >>> fbrc,fbargs = f.bar.__reduce_ex__(2)[:2]
  >>> fbargs
(<type 'instancemethod'>,)
  >>> fbrc(*fbargs)
  Traceback (most recent call last):
    File "<pyshell#2>", line 1, in -toplevel-
      fbrc(*fbargs)
    File "C:\DEVEL\PYTHON\2.4\lib\copy_reg.py", line 92, in __newobj__
      return cls.__new__(cls, *args)
  TypeError: instancemethod expected at least 2 arguments, got 0
  >>> fbrc(fbargs[0], f.bar, f, type(f))
<bound method Foo.bar of Foo([f,o,o])>
  >>> def bar(a, b):
      return (a,b)
  >>> info = bar.__reduce_ex__(2)
  >>> rc,args = info[:2]
  >>> args
  (<type 'function'>,)
  >>> rc(*args)
  Traceback (most recent call last):
    File "<pyshell#9>", line 1, in -toplevel-
      rc(*args)
    File "C:\DEVEL\PYTHON\2.4\lib\copy_reg.py", line 92, in __newobj__
      return cls.__new__(cls, *args)
  TypeError: function() takes at least 2 arguments (0 given)
  >>> baz=rc(args[0], bar.func_code, bar.func_globals)
  >>> baz(1,2)
  (1,2)

Note 'args' is not something like :
  (<type 'function'>, <function bar at 0xXXXXXXXX>, { ... })

As an aside, what is the tuple returned by a reductor called?  What are 
its components called?

 >Normally, the methods live in the class dictionary, so they don't cause a
 >problem with copying the instance.
 >
But a dynamically assigned instance method lives in the intance 
dictionary, making deepcopy choke when it deepcopies the instance state. 
  That makes sense now.

 >It turns out this exception actually makes sense, since you *don't* 
want to copy
 >these atributes to the new instance. If you actually copied them, 
they'd be
 >bound to the *old* instance, rather than the new one.
 >
True.  It wouldn't cause a problem within my __init__, since the 
attribute is reassigned after the deepcopy, though should anyone else 
deepcopy an instance...  Definitely better that the deepcopy throws the 
TypeError.  But why shouldn't we be able to copy a non-method function?

 >So I expect you'll need to provide a __deepcopy__ in order to 
correctly generate
 >the instancemethods bound to the new instance.
 >
That's what I've decided, too.


From robey at flaminglunchbox.net  Wed Feb  2 00:57:12 2005
From: robey at flaminglunchbox.net (Robey Holderith)
Date: Wed, 02 Feb 2005 00:57:12 -0500
Subject: curl and popen2
References: <1107308933.196121.8330@l41g2000cwc.googlegroups.com>
Message-ID: <pan.2005.02.02.05.57.11.134717@flaminglunchbox.net>

On Tue, 01 Feb 2005 17:48:53 -0800, lists04 wrote:

> Hi,
> 
> I have a problem with a curl request and running it under popen2.
> 
> If I run this request from the command line:
> curl -i http://www.yahoo.com/test --stderr errfile
> (also tried redirecting stdderr to a file 2>, nothing) the file errfile
> is empty indicating no error with the request.
> 
> However, when I do something similar in python:
>>>> cmd="curl -i http://www.yahoo.com/test"
>>>> output, input, err = popen2.popen3(cmd)
>>>> error = err.readlines()
>>>> error
> ['  % Total    % Received % Xferd  Average Speed          Time
> Curr.\n', '                                 Dload  Upload Total
> Current  Left    Speed\n', '\r100   981    0   981    0     0  24525
> 0 --:--:--  0:00:00 --:--:-- 24525\r100  2484    0  2484    0     0
> 62100      0 --:--:--  0:00:00 --:--:-- 1467k\n']
> 
> I looked in the man page for curl, it doesnt say that it writes some
> bandwidth statistics to stderr. Am I missing something or is this
> better directed to some other newsgroup? 
> 

Many of the more "sophisticated" command line applications use stderr to
write things that are intended directly for the user's eyes.  The idea is
that it is often useful to have the file itself be written to stdout so
that pipes can be used, but the user still needs to see what is going on. 
Try using "curl --silent -i http://www.yahoo.com/test".  That should turn
off all of the "user-friendly" updates to stderr.

-Robey Holderith

> TIA
> 
> Hari




From haynesc at gmail.com  Mon Feb 28 14:50:12 2005
From: haynesc at gmail.com (haynesc at gmail.com)
Date: 28 Feb 2005 11:50:12 -0800
Subject: cannot open file in write mode, no such file or directory
References: <1109618906.347448.218700@o13g2000cwo.googlegroups.com>
	<1109619707.033450.227120@f14g2000cwb.googlegroups.com>
Message-ID: <1109620212.056771.77930@o13g2000cwo.googlegroups.com>

Kartic wrote:
> > I'm having a problem where when trying to open a file in write
mode,
> I
> > get an IOError stating no such file or directory.  I'm calling an
> > external program which takes an input file and produces an output
> file
> > repeatedly, simulating the input file separately for each
replicate.
> > The error occurs when trying to open the input file to write out
the
> > new data.  The problem is difficult to reproduce since it only
shows
> up
> > once every few thousand replicates.  I've tried using both
os.system
>
> I am afraid you need to give more information that just IOError,
> calling an external program.
>
> Please post the exact message including the input filename at the
time
> the program went down. If you don't print the filename, please modify
> your program to do so.
>
> A shot in the dark solution to your problem might be that you are
> dynamically  generating a filename and that filename probably
contains
> characters not allowed by the local file system OR you generate a
path
> that does not exist. For open() to work with the 'w' flag, the path
> where the file you say should be created should exist.
>
> Thanks,
> -Kartic

Sorry, here is the exact error:

Traceback (most recent call last):
 File "hapSim.py", line 415, in ?
   run(REPLICATES, dsSelection, permuteStatus, sigThreshold
 File "hapSim.py", line 354, in run
   createInput(dt)
 File "hapSim.py", line 178, in createInput
   inF = open(IN_FNAME, "w")
IOError: [Errno 2] No such file or directory: 'prog.input'

I am using the same file name repeatedly, it works fine the first few
thousand times, but eventually gives this error.



From kent37 at tds.net  Mon Feb 21 07:24:54 2005
From: kent37 at tds.net (Kent Johnson)
Date: Mon, 21 Feb 2005 07:24:54 -0500
Subject: How Do I get Know What Attributes/Functions In A Class?
In-Reply-To: <d1c02$42182841$a228dd19$19743@ispnews.usenetserver.com>
References: <1108870842.095282.54200@z14g2000cwz.googlegroups.com>
	<d1c02$42182841$a228dd19$19743@ispnews.usenetserver.com>
Message-ID: <4219d002$1_2@newspeer2.tds.net>

Hans Nowak wrote:
> steven at lczmsoft.com wrote:
> 
>> Hi,
>>
>> I'm new to python.  Given a class, how can I get know what
>> attributes/functins in it without dig into the source?
> 
> 
> Use the dir function:
> 
>  >>> from smtplib import SMTP
>  >>> dir(SMTP)
> ['__doc__', '__init__', '__module__', 'close', 'connect', 'data', 
> 'debuglevel', 'docmd', 'does_esmtp', 'ehlo', 'ehlo_resp', 'expn', 
> 'file', 'getreply', 'has_extn', 'helo', 'helo_resp', 'help', 'login', 
> 'mail', 'noop', 'putcmd', 'quit', 'rcpt', 'rset', 'send', 'sendmail', 
> 'set_debuglevel', 'starttls', 'verify', 'vrfy']
> 
> To get more detailed information than just a list of names, see the 
> inspect module.

Or use 'help' (which is build on top of inspect):
  >>> from smtplib import SMTP
  >>> help(SMTP)
Help on class SMTP in module smtplib:

class SMTP
  |  This class manages a connection to an SMTP or ESMTP server.
  |  SMTP Objects:
  |      SMTP objects have the following attributes:
  |          helo_resp
  |              This is the message given by the server in response to the
  |              most recent HELO command.
etc.

Kent



From ncoghlan at iinet.net.au  Wed Feb  9 07:22:21 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Wed, 09 Feb 2005 22:22:21 +1000
Subject: variable declaration
In-Reply-To: <slrnd0h9r8.26q.apardon@rcpc42.vub.ac.be>
References: <4202A022.3050209@netscape.net>	<MSGID_2=3A5025=2F3.131_4204b0a9@fidonet.org>	<mailman.1978.1107622451.22381.python-list@python.org>	<slrnd0epjg.26q.apardon@rcpc42.vub.ac.be>	<mailman.2069.1107783321.22381.python-list@python.org>	<slrnd0esqn.26q.apardon@rcpc42.vub.ac.be>	<mailman.2152.1107854937.22381.python-list@python.org>	<slrnd0h3e9.26q.apardon@rcpc42.vub.ac.be>	<mailman.2156.1107859510.22381.python-list@python.org>
	<slrnd0h9r8.26q.apardon@rcpc42.vub.ac.be>
Message-ID: <420A007D.3060409@iinet.net.au>

Antoon Pardon wrote:
> Op 2005-02-08, Nick Coghlan schreef <ncoghlan at iinet.net.au>:
>>The CPython *_FAST opcodes relate to functions' local variables. Behind the 
>>scenes they are implemented as integer indexing operations into a pre-sized C 
>>array. Operations don't come much faster than that :)
> 
> 
> I don't follow. AFAIR my remark here above was about the STORE opcode.
> But you seem to react to it as if I am talking about STORE_FAST.

I've been talking about rebinding function local variables all along - which 
means STORE_FAST. I may not have made that explicit, though.

However, even in the general case, "check it already exists and overwrite it if 
it does" is going to be slower than "just store it".

The reason is that, if checking for the existence of the name first somehow 
provides a speed advantage (I still can't see how it could), then the latter 
case of unconditional storage can check for the names existence *just to get the 
speed advantage* (the difference being that the name gets bound irrespective of 
whether it originally existed or not).

Anything that could be used to speed up a rebinding, could most likely be used 
to speed up a standard binding at the same point in the code. So, while it might 
be possible to get rebinding code which isn't any slower than a standard 
binding, it seems practically impossible to do anything to get rebinding code to 
be *faster*.

Cheers,
Nick.

P.S. FWIW, there is no such thing as a STORE opcode, there are only STORE_* opcodes:

Py> print "\n".join([oc for oc in opcode.opname if "STORE" in oc])
STORE_SLICE+0
STORE_SLICE+1
STORE_SLICE+2
STORE_SLICE+3
STORE_SUBSCR
STORE_NAME
STORE_ATTR
STORE_GLOBAL
STORE_FAST
STORE_DEREF

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From dalke at dalkescientific.com  Mon Feb 28 18:08:04 2005
From: dalke at dalkescientific.com (Andrew Dalke)
Date: Mon, 28 Feb 2005 23:08:04 GMT
Subject: accessor/mutator functions
References: <1109315698.002207.245690@g14g2000cwa.googlegroups.com>
	<mailman.3038.1109319115.22381.python-list@python.org>
	<slrnd25qu6.cvr.nick@irishsea.home.craig-wood.com>
	<m2wtssl88h.fsf@unique.fully.qualified.domain.name.yeah.right>
Message-ID: <pan.2005.02.28.23.08.23.223910@dalkescientific.com>

On Mon, 28 Feb 2005 15:50:22 -0500, Dan Sommers wrote:
> The reason their code is so inflexible is that they've filled their
> classes with boiler plate get/set methods.
> 
> Why do users of classes need such access anyway?  If my class performs
> useful functions and returns useful results, no user of my class should
> care about its attributes.  If I "have to" allow access to my attributes
> in order that my users be happy, then I did something else wrong when I
> designed the class and its public interface in the first place.

Consider an interface to a temperature controller.  It will
have several properties:

  - current temperature (read only)
  - target temperature (read/write)
  - various tuning parameters that affect the rate of change,
     stability, etc.; eg, lookup details on a PID controller

These are properties of the temperature controller object.
In Python these properties are traditionally mapped to attributes.
Under languages that don't have a __getattr__/"property" mechanism
for separating interface from implementation these are implemented
via get/set accessor methods.

It is very often useful to change the temperature setting of
a controller over time.  Eg, a chemical protocol might say
"warm from 50 to 80 over a period of 30 minutes, 1 degree
per minute".

In Python that might be written as:

  temp_controller = TemperatureController("/dev/com3")
  temp_controller.target = 50
  print "Bringing reactor to", temp_controller.target
  while 1:
    print "Current temperature is", temp_controller.current
    if abs(temp_controller.current - temp_controller.target) < 0.1:
      break
    time.sleep(30)

  raw_input("Insert sample and press the <enter> key: ")

  for temp in range(51, 81):
    print "Raising reactor temperature to", temp
    temp_controller.target = temp
    time.sleep(60)
    if abs(temp_controller.current - temp) > 0.1:
      print "Variance too high!", temp_controller.current

  print "DONE!"


What's wrong with the use of attributes in this case and how
would you write your interface?

				Andrew
				dalke at dalkescientific.com



From grante at visi.com  Thu Feb 10 12:43:43 2005
From: grante at visi.com (Grant Edwards)
Date: 10 Feb 2005 17:43:43 GMT
Subject: Newbie: SWIG or SIP?
References: <cKKdnfEhSpyv65ffRVn-qg@comcast.com>
	<mailman.2297.1108027503.22381.python-list@python.org>
	<1108056823.384640.133250@f14g2000cwb.googlegroups.com>
Message-ID: <420b9d4f$0$29504$a1866201@visi.com>

On 2005-02-10, suryaprakashg at gmail.com <suryaprakashg at gmail.com> wrote:
> Phil Thompson wrote:
>>> I have a third-party DLL and it's associated .h file.  The DLL
>>> was written in C.  I have neither the associated .c files nor
>>> the .obj files for the DLL.  Can I use SWIG or SIP to build
>>> something that will allow me to use the DLL with Python?  And
>>> what is that something, an .obj file, another DLL or what?
>>
>> Yes, you can use either SWIG or SIP. C (as opposed to C++)
>> support was added with SIP v4. The something is another DLL,
>> conventionally given a .pyd extenstion.
>
> Look at this , this might be more simple to use
>
> http://starship.python.net/crew/theller/ctypes/

ctypes completely rocks.  I'm guessing it's a little more
overhead than using a swigified DLL, but it's dead-easy to use
and doesn't require a C or C++ compiler.  For the stuff I do, a
bit of extra overhead when calling DLL's is completely
negligible.

-- 
Grant Edwards                   grante             Yow!  By MEER biz doo
                                  at               SCHOIN...
                               visi.com            


From news at slalomsk8er.ch  Thu Feb 17 12:20:09 2005
From: news at slalomsk8er.ch (Slalomsk8er)
Date: Thu, 17 Feb 2005 18:20:09 +0100
Subject: Help needed for to build a CGI shell interface.
In-Reply-To: <37jjk4F5eefr4U1@individual.net>
References: <mailman.2755.1108644567.22381.python-list@python.org>
	<37jjk4F5eefr4U1@individual.net>
Message-ID: <4214d128$0$145$fb624d75@newsspool.solnet.ch>

Diez B. Roggisch wrote:
> Slalomsk8er wrote:
> 
> 
>>I don't get it with the popen (popen3 or subprocess).
>>
>>1. How do I establish my pipes?
>>
>>2. And how do I interact with the pipes (interactive CGI-page)?
> 
> 
> There are plenty of python + http frameworks out there - from simple
> cgi-like ones like mod_python to full fledged app servers like zope. As
> usual, google is your friend. No need to dig into the things you mentioned
> above - at least not for what you want to do right now.
What do I want to do? I am building an admintool (deamon and client) and 
for this I need to script a interface to the shell, with the console 
ansi escape sequences, whitch is fully transparent for the user.

I do not want Zope or Plone. I want Python and XUL.

Google is my friend but I did not found the answers I need to understand 
the concepts behind the parts (python internals and shell/terminal things).

Please point me to the info, I can not find it (tryed for some days) or 
post code so I can reverse engenieer ;) and adapt it.

Thanks, Dominik


From harlinseritt at yahoo.com  Wed Feb 16 07:39:16 2005
From: harlinseritt at yahoo.com (Harlin)
Date: 16 Feb 2005 04:39:16 -0800
Subject: some qustions on python
In-Reply-To: <mailman.2640.1108491417.22381.python-list@python.org>
References: <mailman.2640.1108491417.22381.python-list@python.org>
Message-ID: <1108557556.036587.91160@l41g2000cwc.googlegroups.com>

Can you be a bit more specific about what you're wanting? A design
process will be very similar across languages no matter which language
it is. If you'd like a "small evaluation" of Python you're best served
by reading the official summary:

http://www.python.org/doc/Summary.html

Else you'll always be directed to Eric Raymond's How To Ask Smart
Questions FAQ ;-)



From cappy2112 at gmail.com  Wed Feb  9 19:59:34 2005
From: cappy2112 at gmail.com (Cappy2112)
Date: 9 Feb 2005 16:59:34 -0800
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<36q48uF55o5c6U1@individual.net>
Message-ID: <1107997174.490065.272850@g14g2000cwa.googlegroups.com>

Damjan wrote:
> > For all you GUI developers, things just got a little more
interesting.
> > Trolltech will soon be offering the QT GUI toolkit for Windows
under
> > the GPL license.  That means that PyQt may become a much more
popular
> > option in the near future.
>
> This  applies to QT-4 only.
> I wonder how much of PyQT is ready for QT4?
>
> Anyway its time for a PyQT based VB-killer [ a GPL one :) ].


> Anyway its time for a PyQT based VB-killer [ a GPL one :) ].
I aggree, and for now, it's Eric3, AND it can be compiled & run under
windows, without Cygwin.

Ok, it's not exactly a VB-Killer, but it's the closest thing for now.

VB has it's drawbacks, but can you image the how much more acceptance
python would get, if we had *more* a VB-like designer, for multiple GUI
toolkits, no less?



From cpmcdaniel at gmail.com  Wed Feb 16 16:46:17 2005
From: cpmcdaniel at gmail.com (kowboy)
Date: 16 Feb 2005 13:46:17 -0800
Subject: Using 'in' with a Dict
In-Reply-To: <1108590222.589358.7310@o13g2000cwo.googlegroups.com>
References: <1108590222.589358.7310@o13g2000cwo.googlegroups.com>
Message-ID: <1108590377.263790.196130@c13g2000cwb.googlegroups.com>

I posted too quickly. A little performance testing told me that has_key
is somewhat slower than "in". I used a large number of string keys in
my test.



From skip at pobox.com  Thu Feb  3 13:12:01 2005
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 3 Feb 2005 12:12:01 -0600
Subject: managing multiple subprocesses
In-Reply-To: <1107389416.531437.227160@l41g2000cwc.googlegroups.com>
References: <1107389416.531437.227160@l41g2000cwc.googlegroups.com>
Message-ID: <16898.26993.886906.50574@montanaro.dyndns.org>

>>>>> "Marcos" == Marcos  <seejadee at gmail.com> writes:

    Marcos> I have tried all sorts of popens / excevs / os.systems /
    Marcos> commands etc etc. 

I think os.spawn* and os.wait will do what you want.  I have trouble with
os.spawn* myself, so may just fall back to fork/exec + os.wait in the
parent.

Skip


From cjbottaro at alumni.cs.utexas.edu  Thu Feb 17 16:58:05 2005
From: cjbottaro at alumni.cs.utexas.edu (Christopher J. Bottaro)
Date: Thu, 17 Feb 2005 15:58:05 -0600
Subject: super not working in __del__  ?
References: <cuu0pu$t44$1@sea.gmane.org>
	<cuuqrr$f1o$1@sea.gmane.org>	<mailman.2697.1108571847.22381.python-list@python.org>	<11171oljbbb5cd3@corp.supernews.com>
	<mailman.2721.1108588986.22381.python-list@python.org>
	<1117k2oedccgidb@corp.supernews.com>
Message-ID: <cv33s9$tb7$1@sea.gmane.org>

Jeff Shannon wrote:

> Python's __del__() is not a C++/Java destructor.

Learn something new everyday...  What is it then?  Excuse my ignorance, but
what are you suppose to do if your object needs to clean up when its no
longer used (like close open file handles, etc)?  Are you use supposed to
make a method called Destroy() or something and require users to call it
when the object is about to be deleted?  That seems to put the burdon of
ref counting on the user.  I read in the programming FAQ about making an
explicit close() method that can be called multiple times.  It just seems
like kinda a pain when a C++/Java style destructor would nicely do what is
desired.  Should I just stop digging and chalk it up to a limitation of
Python?

I'm just trying to understand all this...

Thanks,
-- C



From carribeiro at gmail.com  Mon Feb  7 15:22:06 2005
From: carribeiro at gmail.com (Carlos Ribeiro)
Date: Mon, 7 Feb 2005 18:22:06 -0200
Subject: empty classes as c structs?
In-Reply-To: <XYqdnb9bj4sVJZrfRVn-vw@comcast.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>
	<mailman.2006.1107658273.22381.python-list@python.org>
	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>
	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>
	<mailman.2049.1107750700.22381.python-list@python.org>
	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com> <4207606E.4040806@iinet.net.au>
	<mailman.2094.1107800398.22381.python-list@python.org>
	<XYqdnb9bj4sVJZrfRVn-vw@comcast.com>
Message-ID: <864d370905020712222c24771b@mail.gmail.com>

On Mon, 07 Feb 2005 11:50:53 -0700, Steven Bethard
<steven.bethard at gmail.com> wrote:
> Michael Spencer wrote:
> > We could use __add__, instead for combining namespaces
> 
> I don't think this is a good idea.  For the same reasons that dicts
> don't have an __add__ (how should attributes with different values be
> combined?), I don't think Bunch/Namespace should have an __add__.

For entirely unrelated reasons I did it for a bunch-like class of
mine, and called it 'merge'. For this particular application it was a
better name than update and append, but that's IMHO.

-- 
Carlos Ribeiro
Consultoria em Projetos
blog: http://rascunhosrotos.blogspot.com
blog: http://pythonnotes.blogspot.com
mail: carribeiro at gmail.com
mail: carribeiro at yahoo.com


From prabhu_r at users.sf.net  Wed Feb  2 14:22:08 2005
From: prabhu_r at users.sf.net (Prabhu Ramachandran)
Date: Thu, 3 Feb 2005 00:52:08 +0530
Subject: ANN: MayaVi-1.4 released
Message-ID: <16897.10336.441595.936112@monster.linux.in>

Hi,

This is to announce the availability of the (long overdue) MayaVi Data
Visualizer version 1.4.

MayaVi is a free, easy to use, scientific data visualizer.  It is
written in Python, uses the Visualization Toolkit (VTK) for the
graphics and provides a GUI written using Tkinter.  MayaVi is
distributed under a BSD license.  It is also cross platform and should
run on any platform where both Python and VTK are available.

For more information, sources, binaries, screenshots, installation
instructions, documentation etc. visit the MayaVi home page at:

	http://mayavi.sourceforge.net

Also bundled with MayaVi is a VTK pipeline browser written in Python
and a utility module that makes using VTK easier from the Python
interpreter.

New in this release:

    * Support for data files belonging to a time series.  It is also
      possible to sweep through the time series.  Thanks to Gerard
      Gorman for an initial patch!

    * Support for user defined modules and filters.  A search path may
      be specified in the preferences.  User defined modules and
      filters are searched for in these directories and automatically
      picked up by MayaVi.  Thanks to Fernando Perez for an initial
      patch!

    * Fixed critical bugs in the Volume module.  Anyone using the
      Volume module from the 1.3 release should upgrade!

    * Miscellaneous enhancements: allow the user to disable rendering
      temporarily, user can specify geometry of the MayaVi window.
      
    * Several other bug fixes and minor enhancements.


Acknowledgements:

 Many thanks to SourceForge for their continued support in hosting
 MayaVi.  Thanks also to various users who provided patches, bug
 reports, support and suggestions.


Have fun!
prabhu


From removethis.kartic.krishnamurthy at gmail.com  Fri Feb  4 08:21:21 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Fri, 04 Feb 2005 13:21:21 GMT
Subject: OT: why are LAMP sites slow?
In-Reply-To: <7xy8e5jagh.fsf@ruckus.brouhaha.com>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
	<7xy8e5jagh.fsf@ruckus.brouhaha.com>
Message-ID: <lFKMd.22186$8H2.13787@twister.nyroc.rr.com>

Paul Rubin said the following on 2/3/2005 10:00 PM:
> I have the idea that the Wikipedia implementers know what they're doing,
> but I haven't looked into it super closely.

Absolutely, hence my disclaimer about not viewing the Mediawiki code.

> Hmm, I wasn't aware that Apache 2.x gave any significant speedups
> over 1.3 except under Windows.  Am I missing something?

Architectural differences. Apache 1.3 spawns a new process for every 
request and before you know, it brings your resources to their knees. I 
don't know what effect Apache 1.3-Win32 has on Windows. Apache 2.x from 
what little I have used is pretty stable on windows and resource 
friendly. (I use Freebsd for serious work)

> Hmm, I'm not familiar with Nevow.  Twisted is pretty neat, though
> confusing.  I don't see how to scale it to multiple servers though.
> 
> I'm asking this question mainly as it relates to midrange or larger
> sites, not the very simplest ones (e.g. on my personal site I just use
> Python cgi's, which are fine for the few dozen or so hits a week that
> they get).  So, the complexity of twisted is acceptable.


True - That is why I can't wait for the twisted sessions during PyCon 
'05 :-)


> Yes, good point about html tables, though I'm concerned primarily
> about server response.  (It's off-topic, but how do you use CSS to get
> the effect of tables?)

My thinking is that all these pieces must fit in well. For example, your 
server response might have been good but the table-driven site could be 
slowing your browser down. The best way to test whether it is the server 
  response that is slow and/or table-driven page is to load that page in 
Lynx.

The CSS way is using <div> placement of the elements. Actually <div> 
gives better control over placement than with HTML tables. And with CSS, 
since you style the various HTML tags, you can create different "skins" 
for your site too. This is definitely OT, like you said, but if you are 
interested, please contact me directly. I don't pretend to be a CSS 
expert but I can help you as much as I can.

Thanks,
--Kartic


From alan.mcintyre at esrgtech.com  Fri Feb  4 13:11:39 2005
From: alan.mcintyre at esrgtech.com (Alan McIntyre)
Date: Fri, 04 Feb 2005 13:11:39 -0500
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <pan.2005.02.04.12.55.01.685657@jerf.org>
References: <dvOMd.33656$EG1.19314@lakeread04>
	<pan.2005.02.04.12.55.01.685657@jerf.org>
Message-ID: <zVOMd.33659$EG1.2536@lakeread04>

I think you're right; sometimes I'm susceptible to the "I can do that in 
one line of code" temptation. :)

Since this current bit of code will probably end up in something that's 
going to be maintained, I will probably stick with the straightforward 
method just to be nice to the maintainer (especially if it's me!).

Jeremy Bowers wrote:
> I think that's pretty elegant; I read it and immediately understood what
> you were doing. There may be some performance tweaks you could make if you
> were doing this to large lists, and my instincts say to re-write it as an
> iterator if you use it a lot like:
> 
> for item in collapse(yourList):
> 
> but other than that which may not even apply, "straightforward" is
> generally a *good* thing, don't you think? :-)
> 


From mahs at telcopartners.com  Fri Feb 25 01:59:29 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 24 Feb 2005 22:59:29 -0800
Subject: [perl-python] generic equivalence partition
In-Reply-To: <eppstein-CDFABC.20594724022005@news.service.uci.edu>
References: <1109245733.261643.219420@f14g2000cwb.googlegroups.com>
	<eppstein-CDFABC.20594724022005@news.service.uci.edu>
Message-ID: <cvmi4l$tef$1@sea.gmane.org>

David Eppstein wrote:
> In article <1109245733.261643.219420 at f14g2000cwb.googlegroups.com>,
>  "Xah Lee" <xah at xahlee.org> wrote:
>>given a list aList of n elements, we want to return a list that is a
>>range of numbers from 1 to n, partition by the predicate function of
>>equivalence equalFunc. 

> In the worst case, this is going to have to take quadratic time 
> (consider an equalFunc that always returns false) so we might as well do 
> something really simple rather than trying to be clever.
> 
> def parti(aList,equalFunc):
>     eqv = []
>     for i in range(len(aList)):
>         print i,eqv
>         for L in eqv:
>             if equalFunc(aList[i],aList[L[0]]):
>                 L.append(i)
>                 break;
>         else:
>             eqv.append([i])
> 
> 
Unless we can inspect the predicate function and derive a hash function such 
that hash(a) == hash(b) => predicate(a,b) is True.  Then the partition can take 
linear time
i.e.,
  >>> def equal(a,b):
  ...     return a[-1] == b[-1]
  ...
  >>> def hashFunc(obj):
  ...     return hash(obj[-1])
  ...
  >>> def parti(aList, hashFunc):
  ...     eqv = {}
  ...     for i,obj in enumerate(aList):
  ...         eqv.setdefault(hashFunc(obj),[]).append(i)
  ...     return eqv.values()
  ...

In the case where the predicate is a "black box", would a logistic regression 
over a sample of inputs enable a hash function to be derived experimentally?

Michael



From R.Brodie at rl.ac.uk  Fri Feb  4 06:45:17 2005
From: R.Brodie at rl.ac.uk (Richard Brodie)
Date: Fri, 4 Feb 2005 11:45:17 -0000
Subject: walktree browser filenames problem
References: <mailman.1877.1107516622.22381.python-list@python.org>
Message-ID: <ctvn8e$9hv$1@blackmamba.itd.rl.ac.uk>


"dimitri pater" <dimitri.pater at gmail.com> wrote in message
news:mailman.1877.1107516622.22381.python-list at python.org...

> The problem is that the filenames are cut off in the status bar of the
> browser because of the white space (eg 'hello.pdf' works, but 'hello
> there.pdf' is displayed as hello).

urllib.quote() should do the trick. You need to follow the rules for
encoding URIs as well as the HTML ones.




From Scott.Daniels at Acm.Org  Mon Feb 14 17:10:34 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Mon, 14 Feb 2005 14:10:34 -0800
Subject: Newbie help
In-Reply-To: <mailman.2568.1108413446.22381.python-list@python.org>
References: <lvUPd.10137$pE1.923@bignews3.bellsouth.net>
	<mailman.2568.1108413446.22381.python-list@python.org>
Message-ID: <42111dfa$1@nntp0.pdx.net>

Francis Girard wrote:
> Mmm. This very much look like a homework from school. Right ?
> Francis Girard
> 
> Le lundi 14 F?vrier 2005 04:03, Chad Everett a ?crit :
> 
>>Hey guys, Hope you can help me again with another problem.  I am
 >>trying to learn Python on my own and need some help with ...

It could also be a task from a tutorial page.  I'd just make sure
to hand out clues rather than answers, and wait for evidence of work
between clues.

--Scott David Daniels
Scott.Daniels at Acm.Org


From me at privacy.net  Mon Feb 28 21:01:29 2005
From: me at privacy.net (Dan Sommers)
Date: 28 Feb 2005 21:01:29 -0500
Subject: accessor/mutator functions
References: <m2mztokzxo.fsf@unique.fully.qualified.domain.name.yeah.right>
	<pan.2005.03.01.00.39.13.16769@ID-174572.user.uni-berlin.de>
Message-ID: <m2acpo6s5i.fsf@unique.fully.qualified.domain.name.yeah.right>

On Tue, 01 Mar 2005 01:39:13 +0100,
Thomas Lotze <thomas at thomas-lotze.de> wrote:

> Dan Sommers wrote:

>> I think I'd add a change_temperature_to method that accepts the
>> target temperature and some sort of timing information, depending on
>> how the rest of the program and/or thread is structured.

> But then you put application logic into a library function. Doing this
> consistently leads to a monster of a library that tries to account for
> all possible applications. Where does this leave the KISS principle?

Maybe I'm "old school," but I usually end up with lots of layers in
between library functions and application logic.  If I think my
"library" layer is too big, yes, I will add another layer of abstraction
around it.  Nothing says that my application has to talk directly to
every low-level library function.

>> In the case of simply reading the current temperature, and not
>> knowing what's inside that device driver, I'd still lean away from
>> exposing a current temperature attribute directly.  I think part of
>> my thinking comes from my old Pascal days, when it made me cringe to
>> think that "x:=b;" might actually execute a subroutine rather than
>> just copy some memory around.

> Then you also avoid lists, dicts and, ironically, methods. Accessing
> methods means to access a callable attribute, after all, with all the
> stuff going on behind the scenes on attribute access.

By that logic, I'd also avoid Python, which, obviously, I'm don't.

When I see a simple construct like "a = b," or "a = b[ 2 ]," or even
"a.b.c = d.e.f," I would like to think that nothing "magic" (for some
suitable definition of "magic") is happening.  Yes, in a language like
Python, a lot more is happening (and a whole lot more *could* happen)
under the hood than in the extremely roughly equivalent "move.l d1,d2"
in assembly language.

I guess we all have our own personal tolerances for "Explicit is better
than implicit."

Regards,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>
?? ? ?? ? c? = 1


From dima at trit.invalid  Thu Feb 17 19:54:21 2005
From: dima at trit.invalid (Dima Dorfman)
Date: 18 Feb 2005 00:54:21 GMT
Subject: Why doesn't join() call str() on its arguments?
References: <mailman.2728.1108595128.22381.python-list@python.org>
	<4214fea9$0$20394$636a15ce@news.free.fr>
	<1108686001.198554.21520@g14g2000cwa.googlegroups.com>
Message-ID: <slrnd1af5t.16s3.dima@beaver.trit.org>

On 2005-02-18, Andy Dustman <farcepest at gmail.com> wrote:
> The reason it does this is exactly why you said: It iterates over the
> sequence and gets the sum of the lengths, adds the length of n-1
> separators, and then allocates a string this size. Then it iterates
> over the list again to build up the string.

The other (and, I suspect, the real) reason for materializing the
argument is to be able to call unicode.join if it finds Unicode
elements in the sequence. If it finds such an element, unicode.join
has to be called on the entire sequence; the part already accumulated
can't be used because unicode.join wants to call PyUnicode_FromObject
on all the elements. Since it can't know whether the original argument
is reiterable, it has to keep around the materialized sequence.

> For generators, you'd have to make a trial allocation and start
> appending stuff as you go, periodically resizing. This *might* end up
> being more efficient in the case of generators, but the only way to
> know for sure is to write the code and benchmark it.

Even if it's not faster, it should use about half as much memory for
non-sequence arguments. That can be a big win if elements are being
generated on the fly (e.g., it's a generator that does something other
than just iterate over an existing sequence).


From glc at well.com  Mon Feb 21 09:13:35 2005
From: glc at well.com (Greg Chapman)
Date: Mon, 21 Feb 2005 14:13:35 GMT
Subject: segfault when calling Python from C thread
References: <mailman.2845.1108863127.22381.python-list@python.org>
	<TA1Sd.1558$873.1345@newsread3.news.pas.earthlink.net>
	<mailman.2864.1108912333.22381.python-list@python.org>
Message-ID: <j0mSd.2601$873.2125@newsread3.news.pas.earthlink.net>

Fredrik Lundh wrote:

> Greg Chapman wrote:
> 
> > Your callback function needs to hold the Python GIL (and have a
> > vaild threadstate) before it calls any Python C-API functions.
> > Change the last part of it to:
> > 
> >    PyGILState_STATE state;
> > 
> >    /* ... */
> > 
> >    /* Time to call the callback */
> > 
> >    state = PyGILState_Ensure();
> > 
> >    arglist = Py_BuildValue("(s)", str);
> >    result = PyEval_CallObject(my_callback, arglist);
> >    Py_DECREF(arglist);
> >    if(result == NULL)
> >        return;
> >    Py_DECREF(result);
> > 
> >    PyGILState_Release(state);
> > }
> 
> you might wish to make sure you release the GIL even if the callback
> raises an exception...
> 
> </F> 

Argh, thanks for catching that.  You probably put that too politely
though (in case anyone sees this who might think that is optional): one
should absolutely make sure all code paths which call PyGILState_Ensure
have a matching call to PyGILState_Release.

---
Greg Chapman


From lbates at syscononline.com  Wed Feb  9 15:55:56 2005
From: lbates at syscononline.com (Larry Bates)
Date: Wed, 09 Feb 2005 14:55:56 -0600
Subject: Newbie:  SWIG or SIP?
In-Reply-To: <cKKdnfEhSpyv65ffRVn-qg@comcast.com>
References: <cKKdnfEhSpyv65ffRVn-qg@comcast.com>
Message-ID: <ZL-dndtxrspB5ZffRVn-tg@comcast.com>

You can call the .DLL file by using a solution
I wrote (and donated) some time ago.  It is located here:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/146847

You will need calldll.pyd available here:

http://www.nightmare.com/software.html

I've used this solution a LOT and it has worked with .DLLs
from many different manufacturers.  Tricky part is having a
full definition of API to dll (e.g. argument types) and using
struct module to communicate between Python and the .DLL.

Larry Bates



Brent W. Hughes wrote:
> I have a third-party DLL and it's associated .h file.  The DLL was written 
> in C.  I have neither the associated .c files nor the .obj files for the 
> DLL.  Can I use SWIG or SIP to build something that will allow me to use the 
> DLL with Python?  And what is that something, an .obj file, another DLL or 
> what?
> 
> Brent
> 
> 


From jonas at freesources.org  Thu Feb 24 12:31:20 2005
From: jonas at freesources.org (Jonas Meurer)
Date: Thu, 24 Feb 2005 18:31:20 +0100
Subject: update images inside a mysql database
Message-ID: <20050224173120.GF4724@resivo.mejo.net>

hello,

i develop a project with a mysql interface. one mysql table holds all
the images for my project.

everything works quite well so far, except i'm not able to upload images
into the database. the following function does the mysql UPDATE, it
requires the image and the image ID as arguments.

additionally it dumps the image to my filesystem ('/tmp/image.gif') -
i test this with gif images.

for some reason, the file dumped to /tmp/image.gif is exactly the same
as uploaded, but in mysql the file is corrupted, far to small and not
even viewable.

here is my function:

def i_update(image, imgid):
        image = "%s" % (image)
        sql_exec = """UPDATE Images SET Image='%s' WHERE ImgID = '%s'
                """ % (image, imgid)
        o = open("/tmp/file.jpg", "w")
        o.write(image)
        o.close()
        db_connect.cursor.execute(sql_exec)


i've the strong feeling that the substitution makes problems. if the
string 'image' conains ' or " for example, the sql_exec is broken.

what do you suggest?

bye
 jonas


From gmane-schpam at joefrancia.com  Sun Feb 20 18:04:35 2005
From: gmane-schpam at joefrancia.com (Joe Francia)
Date: Sun, 20 Feb 2005 18:04:35 -0500
Subject: Moving to Python from PHP - 3 questions
In-Reply-To: <f2582bbd378120970423d611a09d2789@teczno.com>
References: <mailman.2873.1108931203.22381.python-list@python.org>	<cvat62$9h0$05$1@news.t-online.com>
	<f2582bbd378120970423d611a09d2789@teczno.com>
Message-ID: <42191783.2000608@joefrancia.com>

Michal Migurski wrote:
> Thank you. My impression of Zope in the past has been that it does what 
> I need, along with 10,000 other things I don't (built in WebDAV 
> server?!), but clearly I owe it another chance. I've been initially 
> attracted to mod_python because of its raw simplicity and its apparent 
> similarity to mod_php and mod_perl, which I am familiar with. I'll give 
> Zope a try.
> 

I am moving my band's website from an antiquated and horrible PHPNuke 
site to a Python-based site, and so have done quite a bit of research 
about this (though I never considered myself a PHP expert).  Here's what 
I've come up with...

Zope is excellent (especially with Plone), but if you are not building 
applications that require lots of levels of access and permissions and 
collaborations, as well as the 10,000 other things you speak of, you 
probably would like something simpler than Zope, such as CherryPy or 
Quixote.  Both are excellent and light-weight frameworks that give you 
session support and easy access to request variables (as well as full 
access to the entire Python language).  Conceptually, the two are very 
close, but I am slightly more biased towards CherryPy lately.  Quixote 
has better built in form support, but now that I've discovered FormKit, 
this seems to becoming a non-issue.  Also, both are pure Python so 
should run anywhere Python does (though Quixote has a C extension, it 
will fallback to a somewhat slower pure-Python version if your platform 
cannot compile the extension).

There are other good frameworks out there, like Nevow and Webware, but 
have a somewhat larger conceptual overhead which doesn't rest as easy 
with me.  You'll also want to probably look at some of the templating 
kits, of which Cheetah and/or ElementTree work best for me.  (Well, 
ElementTree isn't exactly a templating kit - it's a general-purpose XML 
tookit - but it is easily used for templating.)

General Python web programming:
http://www.python.org/topics/web/

Frameworks/toolkits:
[CherryPy] http://www.cherrypy.org/
[Quixote] http://www.mems-exchange.com/software/quixote
[FormKit] http://dalchemy.com/opensource/formkit/
[Cheetah] http://www.cheetahtemplate.org/
[ElementTree] http://effbot.org/zone/element-index.htm
[Nevow] http://nevow.com/
[Webware] http://www.webwareforpython.org/

For more comparisons of some of the various frameworks:
[PyWebOff] http://pyre.third-bit.com/pyweb/index.html
[Python Web Shootout (older)] http://www.colorstudy.com/docs/shootout.html

-- 
Soraia: http://www.soraia.com



From philippe at philippecmartin.com  Sat Feb 19 19:29:36 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Sun, 20 Feb 2005 00:29:36 GMT
Subject: could that be a mutable object issue ?
References: <mailman.2840.1108835906.22381.python-list@python.org>
	<4217a3b9$1_1@newspeer2.tds.net>
Message-ID: <pan.2005.02.20.00.29.34.854766@philippecmartin.com>

You are correct and I still don't know Python (sigh).

Thanks

Philippe


On Sat, 19 Feb 2005 15:51:18 -0500, Kent Johnson wrote:

> Philippe C. Martin wrote:
>> If I do this:
>> 
>> 
>> 
>> print 'LEN OF BOOK BEFORE APPEND: ', len(pickle.dumps(self.__m_rw))
>> self.__m_rw.books.append( [p_col1,p_col2,p_col3] )
>> print 'LEN OF BOOK AFTER APPEND: ', len(pickle.dumps(self.__m_rw))
>> 
>> I get the same length before and after append.
>> 
>> when I print self.__m_rw.books, I see my 'appends' in there, yet the
>> pickled object does not change.
> 
> How is __m_rw.books defined? If it is a class attribute of the class of __m_rw you will see this 
> behavior. e.g.
> 
>   >>> class Mrw:
>   ...   books = []
>   ...
>   >>> m=Mrw()
>   >>> class Mrw:
>   ...   books = []
>   ...
>   >>> __m_rw = Mrw()
>   >>> __m_rw.books.append(1)
>   >>> __m_rw.books
> [1]
> 
> but __m_rw.books will not be pickled with __m_rw because it belongs to the class, not the instance.
> 
> The fix is to declare books as an instance attribute:
> 
> class Mrw:
>    def __init__(self):
>      self.books = []
> 
> Kent
> 
>> 
>> Any clue ?
>> 
>> Thanks
>> 
>> 
>> Philippe
>> 
>> 
>>



From duncan.booth at invalid.invalid  Thu Feb  3 11:11:55 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 3 Feb 2005 16:11:55 GMT
Subject: Calling a method using an argument
References: <ctth3v$o2r$1@ucsnew1.ncl.ac.uk> <36evn2F51nullU1@individual.net>
	<36f02uF51nullU2@individual.net>
Message-ID: <Xns95F2A4C62E57Cduncanrcpcouk@127.0.0.1>

Diez B. Roggisch wrote:

> If you have more args, do this:
> 
> def test(self, *args):
>     return getattr(self, args[0])(*args[1:])
> 

This would be cleaner written as:

def test(self, method, *args):
    return getattr(self, method)(*args)

and for complete generality:

def test(self, method, *args, **kw):
    return getattr(self, method)(*args, **kw)


From della at toglimi.linux.it  Mon Feb  7 16:23:39 2005
From: della at toglimi.linux.it (Matteo Dell'Amico)
Date: Mon, 07 Feb 2005 21:23:39 GMT
Subject: returning True, False or None
In-Reply-To: <1107574705.956498.219490@c13g2000cwb.googlegroups.com>
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
	<1107573625.439409.100870@o13g2000cwo.googlegroups.com>
	<1107574705.956498.219490@c13g2000cwb.googlegroups.com>
Message-ID: <v%QNd.21132$lB4.569880@twister1.libero.it>

nghoffma wrote:
> sorry, that should have been:
> 
> py>>import sets
> py>>def doit(thelist):
> ...     s = sets.Set(thelist)
> ...     if  s == sets.Set([None]):
> ...             return None
> ...     else:
> ...             return max(s - sets.Set([None]))
> 

Since a function that doesn't return is equivalent to one that returns 
None, you can write it as:

 >>> def doit(lst):
...     s = set(lst) - set([None])
...     if s: return max(s)

that looks to me as the most elegant so far, but this is just because 
it's mine :-)

You can also filter out Nones with a list/generator comprehension, but 
sets are just more elegant...

-- 
Ciao,
Matteo


From http  Sun Feb 20 21:59:11 2005
From: http (Paul Rubin)
Date: 20 Feb 2005 18:59:11 -0800
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<mailman.2735.1108616299.22381.python-list@python.org>
	<1108622622.119311.43200@f14g2000cwb.googlegroups.com>
	<mailman.2746.1108629315.22381.python-list@python.org>
	<1108629775.800508.3400@f14g2000cwb.googlegroups.com>
	<mailman.2777.1108674138.22381.python-list@python.org>
	<1108702957.327528.22010@z14g2000cwz.googlegroups.com>
	<mailman.2790.1108704152.22381.python-list@python.org>
	<1108707658.105102.298300@z14g2000cwz.googlegroups.com>
Message-ID: <7xpsyu8vpc.fsf@ruckus.brouhaha.com>

"Michele Simionato" <michele.simionato at gmail.com> writes:
> Ok, I have yet another question: what is the difference between
> fcntl.lockf and fcntl.flock? The man page of my Linux system says
> that flock is implemented independently of fcntl, however it does
> not say if I should use it in preference over fcntl or not.

It looks to me like flock is 4.2-BSD-style locking and fcntl.lockf is
Sys V style.  I'm not sure exactly what the differences are, but
generally speaking, BSD did this type of thing better than Sys V.  On
the other hand, it looks like lockf has more features, like the
ability to ask for a SIGIO notification if someone tries opening a
file that you have locked.  In Python, flock is certainly easier to
use, since you pass an integer mode flag instead of building up the
weird fcntl structure.

There's one subtlety, which is that I'm not sure locking your file
before updating it is guaranteed to do the right thing.  You may have
to use a second file as a lock.  E.g., suppose the data file is small,
like a few dozen bytes.  So maybe:
  1) process A opens the file.  The contents get read into a cache buffer.
  2) Process B opens the file, locks it, updates it, releases the lock.
  3) Process A locks and updates the file.  Is the cached stuff guaranteed
     to get invalidated even in some awful RFS environment?  Or could
     A clobber B's changes?


From apardon at forel.vub.ac.be  Mon Feb 21 09:20:37 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 21 Feb 2005 14:20:37 GMT
Subject: lambda closure question
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
	<slrnd1jjo4.jkb.apardon@rcpc42.vub.ac.be>
	<mailman.2891.1108988864.22381.python-list@python.org>
	<slrnd1jlne.jkb.apardon@rcpc42.vub.ac.be>
	<37u4dpF5cboqvU1@individual.net>
Message-ID: <slrnd1jrhj.jkb.apardon@rcpc42.vub.ac.be>

Op 2005-02-21, Diez B. Roggisch schreef <deetsNOSPAM at web.de>:
>> But I'll get back at what seems you actually wanted to say:
>> That there is no way to rebind 'x' or in my case 'l' and
>> with that I have to agree although I personnaly find that
>> a lack in python
>
> It's not only that way in python, but in java too. So it seems that there is
> a fundamental principle behind it: In a language that allows sideeffects,
> these will actually happen.
>
> If you're after side-effect free programming, I recommend using a functional
> programming language like ocaml or haskell. In these, you can't mutate
> objects at all, only recreate them and rebind them to new variables. This
> prevents whole classes of errors - but of course it also introduces all
> kinds of other constraints on your programming style, e.g. using monads and
> so on.
>

I have the impression that you misunderstood me. I'm not after a
side-effect free language. I just think python could be nicer in
allowing some side-effects.

-- 
Antoon Pardon


From Flory at fdu.edu  Wed Feb 23 12:14:16 2005
From: Flory at fdu.edu (Flory at fdu.edu)
Date: Wed, 23 Feb 2005 12:14:16 -0500
Subject: PyEphem on Win32 -- 2nd try
Message-ID: <!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAA48bIjzpX0xGAzADAT0HvxsKAAAAQAAAABQ9Ug5ifKUCnMOagrEOglgEAAAAA@fdu.edu>

 
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

A second request for help... 

Has anyone run the PyEphem ephemeris application under WinXP?
http://rhodesmill.org/brandon/projects/pyephem.html 
I have compiled it with Visual Studio 6 and it crashes Python with a
simple

>>> import ephem
>>> ephem.date('1994/7/16')

Identical code works fine under Linux. I suspect that the problem has
to do with a parser built into the c shell for the c code that the
app wraps around.  However, I am not good enough at c to spot the
error.

I am running ActivePython 2.3.5 Build 236 on a WinXP SP2 system with
Visual Studio 6 patched to sp6.

I would appreciate either help from a c guru who knows how to wrap
python around c or a pointer to another list where experts might
reside.
- -------------------------------------------
Cheers, David Flory

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rir+BKqfDqZ0P+lKcwfgdQPu
=5+at
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From dalke at dalkescientific.com  Tue Feb 15 21:19:48 2005
From: dalke at dalkescientific.com (Andrew Dalke)
Date: Wed, 16 Feb 2005 02:19:48 GMT
Subject: hard_decoding
References: <420AA934.6050206@mayo.edu>
	<mailman.2349.1108074761.22381.python-list@python.org>
Message-ID: <pan.2005.02.16.02.19.47.406754@dalkescientific.com>

Coming in a few days late to this one ...

Skip
> See if my latscii codec works for you:
> 
>     http://www.musi-cal.com/~skip/python/latscii.py

for another variation see that "Unicode Hammer" at
  http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/251871

It doesn't do the registry hooks that Skip does, and I see
I need to learn more about the functions in the codes module.

				Andrew
				dalke at dalkescientific.com



From fredrik at pythonware.com  Tue Feb 15 04:51:38 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 15 Feb 2005 10:51:38 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr><4210a434$0$23451$626a14ce@news.free.fr>
	<42115AFC.9040806@freemail.gr>
Message-ID: <cusgim$12o$1@sea.gmane.org>

"jfj" <jfj at freemail.gr> wrote:

> 5. nobody is a troll and there is no trolling going on.

    http://tinyurl.com/6xmfz

</F> 





From merman at o2online.de  Thu Feb 10 18:50:26 2005
From: merman at o2online.de (TK)
Date: Fri, 11 Feb 2005 00:50:26 +0100
Subject: Install MySQLdb on Mac OS X (10.3)
Message-ID: <420bf2f4$0$16553$9b622d9e@news.freenet.de>

Hi,

I can't install MySQLdb on Mac OS X (Ver. 10.3) properly. Here's my 
environment:

1. MySQL-python-1.0.0

2. Python 2.3

3. mysql -V

/usr/local/mysql-standard-4.1.9-apple-darwin7.7.0-powerpc/bin/mysql  Ver 
14.7 Distrib 4.1.9, for apple-darwin7.7.0 (po
werpc)


4. platform.platform() -> 'Darwin-7.6.0-Power_Macintosh-powerpc-32bit'


5. python setup.py build
...
running build_ext
building '_mysql' extension
creating build/temp.darwin-7.6.0-Power_Macintosh-2.3
gcc -fno-strict-aliasing -Wno-long-double -no-cpp-precomp 
-mno-fused-madd -fno-common -dynamic -DNDEBUG -g -O3 -Wall -
Wstrict-prototypes -I/usr/include/mysql -I/usr/local/include/mysql 
-I/usr/local/mysql/include -I/usr/local/mysql/inclu
de/mysql -I/sw/include/mysql 
-I/System/Library/Frameworks/Python.framework/Versions/2.3/include/python2.3 
-c _mysql.c
-o build/temp.darwin-7.6.0-Power_Macintosh-2.3/_mysql.o
_mysql.c: In function `_mysql_ConnectionObject_shutdown':
_mysql.c:1545: error: too few arguments to function `mysql_shutdown'
error: command 'gcc' failed with exit status 1


Can anybody enlighten me?

Thanks for help.

o-o

Thomas


From jepler at unpythonic.net  Sun Feb 27 16:51:38 2005
From: jepler at unpythonic.net (jepler at unpythonic.net)
Date: Sun, 27 Feb 2005 15:51:38 -0600
Subject: os.stat('<filename>')[stat.ST_INO] on Windows
In-Reply-To: <422238b3$1@news.vo.lu>
References: <422238b3$1@news.vo.lu>
Message-ID: <20050227215136.GA21020@unpythonic.net>


On Sun, Feb 27, 2005 at 10:16:34PM +0100, Patrick Useldinger wrote:
> What does the above yield on Windows? Are inodes supported on Windows 
> NTFS, FAT, FAT32?

Refer to the operating system documentation (msdn.microsoft.com?).  os.stat is
mostly a wrapper around whatever the OS provides.  A quick glance at Python
source code shows that maybe _stati64() or _wistat64() is the actual function
used on windows.

Jeff
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From golux at comcast.net  Wed Feb  2 23:40:40 2005
From: golux at comcast.net (Stephen Waterbury)
Date: Wed, 02 Feb 2005 23:40:40 -0500
Subject: IDLE history, Python IDE, and Interactive Python with Vim
In-Reply-To: <1d6cdae305020219434e814e86@mail.gmail.com>
References: <opsllommgvb1cml1@ashot>
	<1d6cdae305020219434e814e86@mail.gmail.com>
Message-ID: <4201AB48.7030202@comcast.net>

Daniel Bickett wrote:
> This is certainly a worthy topic. There are several IDEs for Python
> (one I like very much being Komodo) that have plenty of fancy
> debugging features and advanced operations, however I have yet to
> encounter (elsewhere) the convenience that comes with being able to
> press F5 and have an interactive interpreter load my code and be ready
> for testing.

*Sigh*, I too am a vi kinda guy, and I keep badgering the WingIDE
gang to give Wing a vi mode ... :)  They keep saying "it's coming",
but it's been a while ... and in fairness to them, I don't think
there is exactly a huge horde of vi barbarians at their gate!
Probably a pretty tiny horde, and not very noisy.  ;)

Steve


From guettli at thomas-guettler.de  Wed Feb 16 08:49:44 2005
From: guettli at thomas-guettler.de (Thomas Guettler)
Date: Wed, 16 Feb 2005 14:49:44 +0100
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
Message-ID: <pan.2005.02.16.13.49.43.77741@thomas-guettler.de>

Am Tue, 15 Feb 2005 18:57:47 -0800 schrieb Paul Rubin:

> I've started a few threads before on object persistence in medium to
> high end server apps.  This one is about low end apps, for example, a
> simple cgi on a personal web site that might get a dozen hits a day.
> The idea is you just want to keep a few pieces of data around that the
> cgi can update.
[cut]
> Anyway, something like dbm or shelve coupled with flock-style file
> locking and a version of dbmopen that automatically retries after 1
> second if the file is locked would do the job nicely, plus there could
> be a cleanup mechanism for detecting stale locks.
> 
> Is there a standard approach to something like that, or should I just
> code it the obvious way?

Hi,

I would use the pickle module and access to the
pickle files could be serialized (one after the other
is allowed to read or write) with file locking.

This means your cgi application can only serve one request
after the other.

HTH,
 Thomas

-- 
Thomas G?ttler, http://www.thomas-guettler.de/




From apardon at forel.vub.ac.be  Wed Feb  9 05:27:19 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 9 Feb 2005 10:27:19 GMT
Subject: strange behaviour with decorators.
Message-ID: <slrnd0jpc6.26q.apardon@rcpc42.vub.ac.be>


I tried the following program:

def positive(f):

  def call(self, u):

    if u < 1:
      print 'Not Positive'
      raise ValueError
    return f(self, u)

  return call

class Incrementor:

  def __init__(self, val=0):
    self.value = val

  @positive
  def __call__(self, term = 1):
    print 'incrementing'
    self.value += term
    return self.value

inc = Incrementor(0)
try:
  print inc(1)
  print inc()
  print inc(3)
  print inc(-2)
except:
  pass


And it gave me the following result:

incrementing
1


Now although this behaviour was surprising after somethought
I think I may understand why things go wrong, but I certainly
don't understand the result I got. I would think an error like:

TypeError: call() takes exactly 2 arguments (1 given)

would have been more appropiate.


Am I missing something?
Is it a bug?
Maybe both?

-- 
Antoon Pardon


From jdhunter at ace.bsd.uchicago.edu  Fri Feb  4 10:46:42 2005
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Fri, 04 Feb 2005 09:46:42 -0600
Subject: exporting mesh from image data
In-Reply-To: <ctv7ir$adq$1@sea.gmane.org> (Fernando Perez's message of "Fri,
	04 Feb 2005 00:18:21 -0700")
References: <m3wttpwo49.fsf@peds-pc311.bsd.uchicago.edu>
	<ctv7ir$adq$1@sea.gmane.org>
Message-ID: <m31xbwnx99.fsf@peds-pc311.bsd.uchicago.edu>

>>>>> "Fernando" == Fernando Perez <fperez.net at gmail.com> writes:

    Fernando> I hope you posted this on the VTK list with a CC to
    Fernando> Prabhu as well...  The hopes of a positive reply there
    Fernando> are, I suspect, a fair bit higher.  The scipy list would
    Fernando> be a good idea, too.

Hey Fernando, 

I did get some help from Prabu off list.  The suggestion was to use a
vtkDelaunay3D to mesh the isosurface points into a volume, which
returns an unstructured grid, and then iterate over this structure to
get the volume, face, vertex and connectivity information out.  I've
implemented this and we're in the process of testing it with some
simple geometries.  If/when I get something tested and working, I'll
post it.

Thanks for the links,
JDH


From tdickenson at devmail.geminidataloggers.co.uk  Tue Feb 22 09:11:53 2005
From: tdickenson at devmail.geminidataloggers.co.uk (Toby Dickenson)
Date: Tue, 22 Feb 2005 14:11:53 +0000
Subject: Flow chart (function tree) & cross references
In-Reply-To: <2ab23d7a.0502220527.5d5bba2d@posting.google.com>
References: <2ab23d7a.0502220527.5d5bba2d@posting.google.com>
Message-ID: <200502221411.54034.tdickenson@devmail.geminidataloggers.co.uk>

On Tuesday 22 February 2005 13:27, qwweeeit wrote:

> Does someone knows something about function tree generation and cross
> references?

for trees of *module* dependencies:
http://www.tarind.com/depgraph.html

-- 
Toby Dickenson


From robin at reportlab.com  Wed Feb  2 07:27:10 2005
From: robin at reportlab.com (Robin Becker)
Date: Wed, 02 Feb 2005 12:27:10 +0000
Subject: python and visual C++
In-Reply-To: <ctqdtb$lm7$1@news.univ-rennes1.fr>
References: <ctqdtb$lm7$1@news.univ-rennes1.fr>
Message-ID: <4200C71E.1080900@chamonix.reportlab.co.uk>

Olivier Ravard wrote:
....... use another compilator
> 
> Is there anyone that have experienced this "free" problem and is there a
> solution
> that I did not note. I don't want to buy MSVC...
> 
> Thanks
> 
> O.R.
> 
> 
> 
Googled mingw lib for python brings me to

http://www.mingw.org/MinGWiki/index.php/Python%20extensions

which may help

-- 
Robin Becker



From fusionary_2000 at yahoo.com  Mon Feb 28 02:01:05 2005
From: fusionary_2000 at yahoo.com (Gensek)
Date: 27 Feb 2005 23:01:05 -0800
Subject: wxGrid
Message-ID: <1109574065.613518.241750@l41g2000cwc.googlegroups.com>

I have a grid. I want to sort it when a column label is clicked. I know
about the EVT_GRID_LABEL_LEFT_DCLICK event, but that is not enough. I
do not merely need to know that a label was clicked. I need to know
which label was clicked. I do not know how to do that. I suspect you
might know. I request that you tell me.

I also wish to know some other things: how to find out the location of
a mouse pointer in a wxWindow (or at least the frame), and how to
change the color of a single specified pixel in a bitmap.

I use Python 2.3, wxPython 2.4.2.



From tjreedy at udel.edu  Wed Feb 16 20:52:13 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 16 Feb 2005 20:52:13 -0500
Subject: adding new functionality to a function non-intrusively!
References: <1108564620.657526.301320@g14g2000cwa.googlegroups.com><1108566348.660335.224170@g14g2000cwa.googlegroups.com><mailman.2713.1108579364.22381.python-list@python.org>
	<1108591505.670637.258590@c13g2000cwb.googlegroups.com>
Message-ID: <cv0t79$vlq$1@sea.gmane.org>


"peter" <Peter.Vandersteegen at gmail.com> wrote in message 
news:1108591505.670637.258590 at c13g2000cwb.googlegroups.com...
> indeed it does,  so basically everything works except my original
> solution:
>
> def myfunction(a,b):
>    return a+b
>
> def _myfunction(a,b):
>       return myfunction(a,b)
> myfunction = _myfunction
>
> oh well, it was enough to puzzle my tiny brain....

For newbies reading this, the point is that names within functions, 
including global function names, are looked up when and each time the 
function is *called*, not when it is defined.  So even though _myfunction 
does not *look* recursive, since it appears to call some other function, 
the name rebinding after *makes* it recursive.  Conversely, we can make a 
recursive-looking function not recursive.
>>> def f(): return f() # sure looks infinitely recursive
...
>>> g = f
>>> f = int # arbitrary choice of function that will accept no args
>>> f()
0
>>> g()
0

Moral: be careful about rebinding function names, and the order in which 
you do so.

Terry J. Reedy





From almondb at gmail.com  Fri Feb 25 03:39:17 2005
From: almondb at gmail.com (Brian)
Date: 25 Feb 2005 00:39:17 -0800
Subject: wxpython tutorials
In-Reply-To: <1109309093.384392.59230@l41g2000cwc.googlegroups.com>
References: <1109309093.384392.59230@l41g2000cwc.googlegroups.com>
Message-ID: <1109320757.421003.46430@l41g2000cwc.googlegroups.com>

Raghul,

The second link Harlin gave is to the wxPython wiki - it has a variety
of pages with information about the toolkit including a number of
tutorial pages.  The "Getting Started" document linked on the main page
is pretty thorough.  Once you comfortable with some of the basic
concepts, I'd suggest looking through the wxPython demo code.  Find
something interesting in the demo, then look at the associated "Demo
Code" tab to see how it's implemented.

In case you have any questions, the wxpython-users list is a great
source of information for wxpython beginners as well as more advanced
users.  It's archived in a few different locations (some are easier to
read or search than others):

Via wxwidgets.org
http://lists.wxwidgets.org/cgi-bin/ezmlm-cgi/11

Via ActiveState
http://aspn.activestate.com/ASPN/Mail/Browse/Threaded/wxPython-users

Via Gmane
http://dir.gmane.org/gmane.comp.python.wxpython



From grante at visi.com  Sun Feb 20 12:46:58 2005
From: grante at visi.com (Grant Edwards)
Date: 20 Feb 2005 17:46:58 GMT
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr>
	<42185b05$0$15460$9b622d9e@news.freenet.de>
	<cv9sdo$69n$3@usenet.otenet.gr>
	<42189527$0$6260$9b622d9e@news.freenet.de>
	<cvadcj$mqc$1@usenet.otenet.gr>
	<mailman.2866.1108917759.22381.python-list@python.org>
	<cvafgu$2lk$1@usenet.otenet.gr>
Message-ID: <4218cd12$0$46529$a1866201@visi.com>

On 2005-02-20, Ilias Lazaridis <ilias at lazaridis.com> wrote:

>> If you would have written:
>> 
>> """
>> Should I take answers serious? Answer from people which do not respect 
>> coherence of writings?
>> """
>> 
>> it would have been much more coherent.
>
> I understand.

I doubt it.

> I still detect the coherence.
>
> As most people in this group will detect the coherence.

You, sir, are a loon.

I've detected little coherence in _any_ of your postings.

-- 
Grant Edwards                   grante             Yow!  I want to TAKE IT
                                  at               HOME and DRESS IT UP in
                               visi.com            HOT PANTS!!


From jzgoda at gazeta.usun.pl  Sat Feb 19 15:34:38 2005
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Sat, 19 Feb 2005 21:34:38 +0100
Subject: Pausing a program - poll/sleep/threads?
In-Reply-To: <1108843518.024709.139640@f14g2000cwb.googlegroups.com>
References: <1108625477.222091.34680@l41g2000cwc.googlegroups.com>
	<1119nf8qqj5gfbe@corp.supernews.com>
	<1108666816.520517.91390@o13g2000cwo.googlegroups.com>
	<1119v7o1h4k8be5@corp.supernews.com>
	<1108699641.787642.310960@f14g2000cwb.googlegroups.com>
	<1108839864.101293.184050@o13g2000cwo.googlegroups.com>
	<1108843518.024709.139640@f14g2000cwb.googlegroups.com>
Message-ID: <cv87u2$k27$1@atlantis.news.tpi.pl>

Simon John napisa?(a):

> Damn, seems Qt GUI objects (windgets) aren't thread-safe:
> 
> http://doc.trolltech.com/3.3/threads.html#11

Like most (if not all) others GUI toolkits.

> So I'm going to have to find a way of using a thread to fetch the data,
> and then using the main program to update the GUI... Someone suggested
> using events:
> 
> http://mail.python.org/pipermail/python-list/2002-February/089360.html

See http://www.informit.com/articles/printerfriendly.asp?p=30708

-- 
Jarek Zgoda
http://jpa.berlios.de/ | http://www.zgodowie.org/


From ajikoe at gmail.com  Fri Feb  4 09:03:52 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 4 Feb 2005 06:03:52 -0800
Subject: regular expression match collection
Message-ID: <1107525832.015932.286300@f14g2000cwb.googlegroups.com>

Hello,

For example I have a string : "Halo by by by"
Then I want to take and know the possition of every "by"
how can I do it in python?

I tried to use:

  p = re.compile(r"by")
  m = p.search("Helo by by by")
  print m.group() # result "by"
  print m.span()  # result (5,7)

How can I get the information of the other by ?

Sincerely Yours,
Pujo Aji



From fouff at fouff.com  Thu Feb 10 11:09:42 2005
From: fouff at fouff.com (Fouff)
Date: Thu, 10 Feb 2005 17:09:42 +0100
Subject: goto, cls, wait  commands
In-Reply-To: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
Message-ID: <420b8757$0$9481$626a14ce@news.free.fr>

BOOGIEMAN a ?crit :
> I've just finished reading Python turtorial for non-programmers
> and I haven't found there anything about some usefull commands I used in
> QBasic. First of all, what's Python command equivalent to QBasic's "goto" ?
I had a professor that told me that using goto in prog is that there is 
a mistake in the algorythm.
If I remember, I think there is no goto instruction in python !

> Secondly, how do I clear screen (cls) from text and other content ?
I don't understand well what you exactly want to do. Can you explain 
more please.

> And last, how do I put program to wait certain amount of seconds ?
> If I remeber correctly I used to type "Wait 10" and QBasic waits 
> 10 seconds before proceeding to next command.
import time
    time.sleep(10)


From danperl at rogers.com  Thu Feb  3 23:14:52 2005
From: danperl at rogers.com (Dan Perl)
Date: Thu, 3 Feb 2005 23:14:52 -0500
Subject: advice needed for simple python web app
Message-ID: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>

I have a pretty simple python script and I would like to turn it into a web 
application but web apps are a domain I know very little about.  I know that 
Twisted, CherryPy, Plone and Zope exist but not exactly what they do.  I 
need only advice on a direction to take.  For instance a suggestion on which 
application/framework to use would be great.

Basically, what I'm looking for is a web server that accepts an HTTP request 
and invokes a python script.  But I would like a "pythonic" solution so a 
web server like Apache is a solution that I would like to avoid.  The server 
should also be as simple as possible to administrate.

I would be even interested in building a very simple web app server if there 
is a framework that has all the basic components and there is good 
documentation for how to use it.

Thanks,

Dan 




From ajikoe at gmail.com  Tue Feb  1 08:41:19 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 1 Feb 2005 05:41:19 -0800
Subject: type of simple object
In-Reply-To: <tyfhdkwl9u3.fsf@pcepsft001.cern.ch>
References: <1107255752.258025.50870@z14g2000cwz.googlegroups.com>
	<1107257264.146280.89560@c13g2000cwb.googlegroups.com>
	<1107258136.815344.145380@c13g2000cwb.googlegroups.com>
	<tyfy8e8lcef.fsf@pcepsft001.cern.ch>
	<1107261198.943087.80960@z14g2000cwz.googlegroups.com>
	<tyfhdkwl9u3.fsf@pcepsft001.cern.ch>
Message-ID: <1107265279.327793.26430@z14g2000cwz.googlegroups.com>

Hello Jacek,

Thanks for the answer,

Can you tell me how can I check if an object is a sequence (you are
right, this is actually what I want)?



From steven.bethard at gmail.com  Mon Feb  7 12:37:24 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 07 Feb 2005 10:37:24 -0700
Subject: Confused with methods
In-Reply-To: <mailman.2075.1107792148.22381.python-list@python.org>
References: <mailman.2022.1107703890.22381.python-list@python.org>	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>	<slrnd0enor.26q.apardon@rcpc42.vub.ac.be>	<1grmd4z.1tlm4e61650vedN%aleaxit@yahoo.com>	<slrnd0f07t.26q.apardon@rcpc42.vub.ac.be>	<1grmg8s.17t7tj4180jdj6N%aleaxit@yahoo.com>
	<mailman.2075.1107792148.22381.python-list@python.org>
Message-ID: <INednSf1ioDSOprfRVn-jg@comcast.com>

jfj wrote:
> I think the problem is that you know python so well that you are used
> to the way things are and everything seems natural the way it is.
> For a newbie, the behaviour I mentioned seems indeed a bit inconsistent.
> "Inconsistent" not as in mathematics but as in "wow! I'd thought this
> should work like this". Like you have a perception of the language
> and then this feature changes everything. It's a different kind of
> "inconsistency" and it doesn't give python a bad name or something,
> nor does it break the mathematical laws of the universe.

Yup, this kind of discovery happens all the time.  When you ask about it 
though, you should try to be clear that you're asking a question, not 
making an assertion.  Your post said things like:

...this is not possible...
...we prove that it is indeed a function...
...Isn't that inconsistent?...

This makes you sound very certain of yourself.  If you're willing to 
acknowledge that your understanding of Python is incomplete and ask 
questions instead of making assertions, you'll get a lot fewer hostile 
responses to your posts.

For your benefit, and the benefit of others who make this same mistake, 
I'll rewrite your original post in a manner that won't seem so 
self-important and confrontational[1].

Here's your original post:

----------------------------------------------------------------------
I don't understand.
We can take a function and attach it to an object, and then call it
as an instance method as long as it has at least one argument:

[snip example assigning function to class]

However this is not possible for another instance method:

[snip example assigning instancemethod to class]

Python complains that 'foo() takes exactly 2 arguments (1 given)'.
But by calling "b.foo(1)" we prove that it is indeed a function which takes
exactly one argument.

Isn't that inconsistent?
----------------------------------------------------------------------

And here it is rewritten to sound less confrontational:

----------------------------------------------------------------------
I don't understand.
I can take a function and attach it to an object, and then call it
as an instance method as long as it has at least one argument:

[snip example assigning function to class]

But I don't know how to do the same thing when I get the function from 
an instance:

[snip example assigning instancemethod to class]

Python complains that 'foo() takes exactly 2 arguments (1 given)'.

Can someone explain this behavior to me?  How would I get a function 
from an instance and assign it to a class?
----------------------------------------------------------------------

I've left most of the terminological errors in the question since they 
were probably inevitably part of the question.  Note however, that my 
rewrite of your post makes it clear that you are asking questions, not 
making assertions.  If you don't make assertions about things you don't 
fully understand, you'll have a much easier time on this newsgroup.

Steve

[1] This was probably not the intended air, but that's how it came across.


From jeff at ccvcorp.com  Thu Feb 17 13:38:13 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Thu, 17 Feb 2005 10:38:13 -0800
Subject: [newbie]How to install python under DOS and is there any
 Wxpython can be installed under dos?
In-Reply-To: <WeZQd.9284$IW4.222365@news2.e.nsc.no>
References: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
	<mailman.2685.1108553200.22381.python-list@python.org>
	<b9-dnTUOwoYK647fRVn-2Q@rogers.com>
	<WeZQd.9284$IW4.222365@news2.e.nsc.no>
Message-ID: <1119p2gm0mhhcf9@corp.supernews.com>

Leif B. Kristensen wrote:
> john san skrev:
> 
>>pure DOS, old pc, used for teaching . want show some "windows" under
>>DOS (under Python).
> 
> curses is a text-based interface that will let you build windowed
> applications like you could with the crt unit in Turbo Pascal of those
> golden days. I've no idea if anyone's compiled it for the 16-bits DOS
> platform, though.

Curses is a *nix interface.  There are attempts at a work-alike 
package for Windows, which by all reports are not very successful. 
Whether any of those would maintain their already-limited 
functionality under DOS is questionable.

There *are* similar-but-not-compatible libraries for DOS... or perhaps 
I should say *were*, because I have no idea where one might find such 
a thing now.  (Though I presume that Google would be the best starting 
place.)  One would then need to find/create a Python wrapper for that 
library...

Jeff Shannon



From ilias at lazaridis.com  Sun Feb 20 11:20:33 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sun, 20 Feb 2005 18:20:33 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <42189527$0$6260$9b622d9e@news.freenet.de>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr>
	<42185b05$0$15460$9b622d9e@news.freenet.de>
	<cv9sdo$69n$3@usenet.otenet.gr>
	<42189527$0$6260$9b622d9e@news.freenet.de>
Message-ID: <cvadcj$mqc$1@usenet.otenet.gr>

Martin v. L?wis wrote:
> Ilias Lazaridis wrote:
> 
>> Should I take answers serious?
> 
> If not, why are you asking questions in the first place?

simply read the next question, which limits the scope of the first one.

>> Answer from people which do not respect coherence of writings?
> 
> Coherence of writings?

An example:

they above 2 questions are coherent, thus answering isolated [as you've 
done] makes not much sense.

"
 >> Should I take answers serious?
 >> Answer from people which do not respect coherence of writings?
"

[answering here makes sense]

>> Should a professional developer take python serious?
> 
> Yes.
> 
>> I mean, if the team does not manage at least the foundation of a 
>> multi-target automated-build-process?
> 
> If the team *would* not manage at least the foundation of a
> multi-target automated-build-process, a professional developer
> *should* not take python serious.

Very nice.

At this point, we agree very much.

> However, since the team *does* manage at least the foundation of
> a multi-target automated-build-process, a professional developer
> *might* take python serious.

here our disagreement:

=> {"managing the foundation of a multi-target automated-build-process"}

What are the requirements for fulfilling this?

> [a false premise can imply anything]

again you ignore coherent writings.

-

You have omitted the following part of my writings:

"[targets need not to be supported directly by the python team. They 
could be added/managed/maintained by community members]"

in which I essentially define a few requirements for "managing the 
foundation of a multi-target automated-build-process".

-

The python team should provide the fundamental infrastructure for the 
community, thus it can add/manage/maintain build targets.

Additionally:
   * The python-team should detect any efforts made for different 
build-targets
   * The python-team should attract/engourage the authors to include 
them in the main build-system [incubation section].

The python-community and the PSF supports the python-team to take the 
above actions.

> Regards,
> Martin

.

-- 
http://lazaridis.com


From stefan.behnel-n05pAM at web.de  Wed Feb  2 07:55:24 2005
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 02 Feb 2005 13:55:24 +0100
Subject: Prepending to traceback
Message-ID: <ctqijj$q6t$1@lnx107.hrz.tu-darmstadt.de>

Hi!

I'm writing a parser using pyparsing and I would like to augment the 
ParserException tracebacks with information about the actual error line *in 
the parsed text*. Pyparsing provides me with everything I need (parsed line 
and column), but is there a way to push that information on the traceback?


To make it a bit clearer, tracebacks currently look like this:

Traceback (most recent call last):
  ...
   File "/usr/lib/python2.4/site-packages/pyparsing.py", line 456, in parse
     loc,tokens = self.parseImpl( instring, loc, doActions )
   File "/usr/lib/python2.4/site-packages/pyparsing.py", line 727, in parseImpl
     raise exc
ParseException: Expected "SOMEOTHERTERM" (146), (5,9)


I want them to look like this:

Traceback (most recent call last):
  ...
   File "/usr/lib/python2.4/site-packages/pyparsing.py", line 456, in parse
     loc,tokens = self.parseImpl( instring, loc, doActions )
   File "/usr/lib/python2.4/site-packages/pyparsing.py", line 727, in parseImpl
     raise exc
   PyParsing, line 5, in SomeStatement
     PARSER TEST FOR TESTING MISSING TERM
ParseException: Expected "SOMEOTHERTERM" (146), (5,9)


where "PARSER TEST FOR TESTING MISSING TERM" is a line parsed by pyparsing 
that leads to raising a ParseException. I wouldn't mind too much not having 
the original traceback, though I'd prefer it. I remember having read somewhere 
that there is a way to embed an exceptions in another one, that might help.

How can I alter or create such Tracebacks?

Thanks,
Stefan


From __peter__ at web.de  Thu Feb  3 07:25:06 2005
From: __peter__ at web.de (Peter Otten)
Date: Thu, 03 Feb 2005 13:25:06 +0100
Subject: Basic file operation questions
References: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
	<opsllt9r191js0xs@news.telkomsa.net>
	<mailman.1808.1107431422.22381.python-list@python.org>
Message-ID: <ctt53b$l5u$00$1@news.t-online.com>

Peter Nuttall wrote:

> On Wed, Feb 02, 2005 at 11:47:41PM -0500, Caleb Hattingh wrote:
>> Hi Alex
>> 
>> Assuming you have a file called "data.txt":
>> 
>> ***
>> f = open('data.txt','r')
>> lines = f.readlines()
>> f.close()
>> for line in lines:
>>     print line
>> ***
>>
> 
> Can you not write this:
> 
> f=open("data.txt", "r")
> for line in f.readlines():
> #do stuff to line
> f.close()
> 
> Pete

Yes, you can even write

f = open("data.txt")
for line in f:
    # do stuff with line
f.close()

This has the additional benefit of not slurping in the entire file at once.
Be aware, though, that this (newer) style of using a file as an iterator
doesn't mix well with seek() operations.

Peter


From samantha7395 at hotmail.com  Thu Feb 17 19:51:41 2005
From: samantha7395 at hotmail.com (Samantha)
Date: Thu, 17 Feb 2005 16:51:41 -0800
Subject: Probably over my head... Trying to get Font Names
Message-ID: <B8KdneiuyLaKoYjfRVn-vQ@adelphia.com>

I am attempting to extract the Font Names from the installed windows fonts. 
I am having a heck of a time getting these rather than the file names. 
Examples can be seen by going to Control Panel > Fonts

Any help or direction is appreciated.
S 




From tjreedy at udel.edu  Wed Feb 16 13:33:03 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 16 Feb 2005 13:33:03 -0500
Subject: adding new functionality to a function non-intrusively!
References: <1108564620.657526.301320@g14g2000cwa.googlegroups.com><1108565730.135442.174550@l41g2000cwc.googlegroups.com>
	<1108566348.660335.224170@g14g2000cwa.googlegroups.com>
Message-ID: <cv03fu$c8u$1@sea.gmane.org>


"peter" <Peter.Vandersteegen at gmail.com> wrote in message 
news:1108566348.660335.224170 at g14g2000cwa.googlegroups.com...
> so my problem in fact  is:
> BEFORE:
> def myfunction(a,b):
>      return (a+b)
> AFTER:
> def myfunction(a,b, op="add"):
>       if (op == "add"):
>              # some function which calls the old code for myfunction

Is this wrapping what you want?

_myfunction = myfunction
def myfunction(a,b, op='add'):
  if (op == 'add'): return _myfunction(a,b)
  # else do new stuff and return

Terry J. Reedy





From caleb1 at telkomsa.net  Tue Feb  8 22:44:52 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Tue, 08 Feb 2005 22:44:52 -0500
Subject: Python versus Perl ?
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
	<hkhc01dnpmmhn980quijqil40653qipdki@4ax.com>
	<cuavn1$bag$1@nntp.msstate.edu>
Message-ID: <opslwvc2wx1js0xs@news.telkomsa.net>

Hi m

Speed is a contentious issue here.  Point is, if you really need raw  
speed, why stop only at Perl and Python?  There are plenty of statically  
compiled languages that will produce native binaries.

The relative difference in speed between Perl and Python, whatever it is,  
is completely washed out by the enormous jump using, say, C for example  
[please, everyone else, I am aware of all the mitigating circumstances  
regarding, e.g. parts of the standard library written in C, etc.  That is  
not my point.]

A Good Reason for thinking along these lines (Perl/Python) is more  
something like speed and reliability of development.  Another one is  
maintaintability.  I must confess that I know pretty much nothing about  
Perl, so I can't comment about that.  My opinion about Python is that it  
is very, very good for these things.

The problem domains in which I do most of my work (chemical process  
modelling and simulation) really do require speed.  That's why I mostly  
use Delphi (i.e. reasonably fast code) at work.   I believe I know when  
speed is and is not an issue, and (by far) most of the time, my experience  
is that it is *not*.  So I use Delphi for numerical code and python for  
everything else.

You really will have to convince people here that execution speed is a  
real issue for your programming task (in order to continue this  
discussion).  Otherwise the debate will go south real quick.

Keep well
Caleb


On Tue, 08 Feb 2005 12:17:05 -0600, m <m at m.com> wrote:

> Courageous wrote:
>>
>>> If Python is better than Perl, I'm curious how really significant
>>> those advantages are ?
>
> speedwise, i think perl is faster than python and python performed the  
> slowest as shown in http://www.flat222.org/mac/bench/



From steven.bethard at gmail.com  Wed Feb 16 17:05:10 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 16 Feb 2005 15:05:10 -0700
Subject: Using 'in' with a Dict
In-Reply-To: <1108590222.589358.7310@o13g2000cwo.googlegroups.com>
References: <1108590222.589358.7310@o13g2000cwo.googlegroups.com>
Message-ID: <JY-dneaAzdAJXo7fRVn-iQ@comcast.com>

cpmcdaniel at gmail.com wrote:
> I was wondering if the following two "if" statements compile down to
> the same bytecode for a standard Dictionary type:
> 
> m = {"foo": 1, "blah": 2}
> 
> if "foo" in m:
>   print "sweet"
> 
> if m.has_key("foo"):
>   print "dude"

To answer the question you actually asked, you can use dis.dis:

py> def f1(s, m):
...     if s in m:
...         pass
...
py> def f2(s, m):
...     if m.has_key(s):
...         pass
...
py> import dis
py> dis.dis(f1)
   2           0 LOAD_FAST                0 (s)
               3 LOAD_FAST                1 (m)
               6 COMPARE_OP               6 (in)
               9 JUMP_IF_FALSE            4 (to 16)
              12 POP_TOP

   3          13 JUMP_FORWARD             1 (to 17)
         >>   16 POP_TOP
         >>   17 LOAD_CONST               0 (None)
              20 RETURN_VALUE
py> dis.dis(f2)
   2           0 LOAD_FAST                1 (m)
               3 LOAD_ATTR                1 (has_key)
               6 LOAD_FAST                0 (s)
               9 CALL_FUNCTION            1
              12 JUMP_IF_FALSE            4 (to 19)
              15 POP_TOP

   3          16 JUMP_FORWARD             1 (to 20)
         >>   19 POP_TOP
         >>   20 LOAD_CONST               0 (None)
              23 RETURN_VALUE

Note that in the *bytecode*, f1 uses COMPARE_OP, while f2 uses LOAD_ATTR 
and CALL_FUNCTION.  So no, the bytecode is different.

If the question you meant to as was "Do Python's builtin dicts use the 
same code for 'in' and 'has_key'?", you can check dictobject.c:

static PyMethodDef mapp_methods[] = {
	{"__contains__",(PyCFunction)dict_has_key,      METH_O | METH_COEXIST,
	 contains__doc__},
	...
	{"has_key",	(PyCFunction)dict_has_key,      METH_O,
	 has_key__doc__},
	...
};

Note that both __contains__ and has_key are mapped to dict_has_key.  So 
yes, the same C code will be executed in both cases[1].

STeVe

[1] modulo the different lookup paths to find these methods


From jordan2856977 at 163.com  Sun Feb  6 01:03:12 2005
From: jordan2856977 at 163.com (jordan2856977)
Date: 5 Feb 2005 22:03:12 -0800
Subject: sos!
References: <6d2e4eef.0502050342.d8744cb@posting.google.com>
	<StKdnVdY3-KK2pjfRVn-uw@rogers.com>
	<1107643244.510478.261130@o13g2000cwo.googlegroups.com>
	<NIWdne_Ope4t0JjfRVn-hw@rogers.com>
Message-ID: <6d2e4eef.0502052203.14ed0068@posting.google.com>

"Dan Perl" <danperl at rogers.com> wrote in message news:<NIWdne_Ope4t0JjfRVn-hw at rogers.com>...
> <mensanator at aol.com> wrote in message 
> news:1107643244.510478.261130 at o13g2000cwo.googlegroups.com...
> >
> > Dan Perl wrote:
> >> [...]
> > Aren't you in the wrong newsgroup? :-)
> 
> Aren't you funny?
i think i have solve
the problem thank you


From efrat_regev at yahoo.com  Thu Feb 24 12:11:07 2005
From: efrat_regev at yahoo.com (Efrat Regev)
Date: Thu, 24 Feb 2005 11:11:07 -0600
Subject: Python Modules for Various Internet Protocols?
Message-ID: <PLidnd5RcOYwYYDfRVn-3w@adelphia.com>

    Hello,

    I was wondering whether there are any Python modules for various
Internet protocols, e.g., is there something similar to

import ftp

client = ftpopen(...)

    and so on.

    Thanks,

    Efrat




From cam.ac.uk at mh391.invalid  Thu Feb 10 21:49:14 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Fri, 11 Feb 2005 02:49:14 +0000
Subject: goto, cls, wait  commands
In-Reply-To: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
Message-ID: <cuh6fc$ms2$1@gemini.csx.cam.ac.uk>

BOOGIEMAN wrote:
> First of all, what's Python command equivalent to QBasic's "goto" ?

You can only use the goto function if you use Python with line numbers,
thusly:

"""
10 import sys
20 real_stdout = sys.stdout
30 class fake_stdout(object): pass
40 fake_stdout.write = lambda x, y: None
50 sys.stdout = fake_stdout()
60 import this
70 sys.stdout = real_stdout
80 d = {}
90 c = 65
100 i = 0
110 d[chr(i+c)] = chr((i+13) % 26 + c)
120 if i == 26: goto(150)
130 i += 1
140 goto(110)
150 if c == 97: goto(180)
160 c = 97
170 goto(100)
180 print "How zen it is:"
190 print "".join([d.get(c, c) for c in this.s])
"""

z = dict((int(x[0]), " ".join(x[1:])) for x in (y.split() for y in (__doc__ or _).strip().splitlines())); k = [0] + sorted(z.keys()); m = dict((b,a) for a,b in enumerate(k)); l = k[1]

def goto(n): global l; l = k[m[n]-1]

while l and l <= k[-1]: exec z[l]; l = l != k[-1] and k[m[l]+1]

-- 
Michael Hoffman


From pobrien at orbtech.com  Mon Feb 14 13:27:06 2005
From: pobrien at orbtech.com (Pat)
Date: 14 Feb 2005 10:27:06 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2543.1108399510.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>
	<mailman.2543.1108399510.22381.python-list@python.org>
Message-ID: <1108405626.130007.320710@l41g2000cwc.googlegroups.com>

I thought I was being as clear and specific as I needed to be.
Apparently not.  I'm talking about compiling the original source code,
per the recommendations made by Mike Fletcher and documented here:

Python 2.4 Extensions w/ the MS Toolkit Compiler

http://www.vrplumber.com/programming/mstoolkit/

Now, if you know something I don't, I'm all ears.  But I don't see how
your suggestion solves my problem.  But I'll be thrilled if that is the
case.  Care to enlighten me?

--
Patrick K. O'Brien
Orbtech    http://www.orbtech.com
Schevo     http://www.schevo.org
Pypersyst  http://www.pypersyst.org



From danb_83 at yahoo.com  Fri Feb  4 14:41:17 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 4 Feb 2005 11:41:17 -0800
Subject: Converting strings to dates
References: <mailman.1902.1107541483.22381.python-list@python.org>
Message-ID: <1107546077.445591.24030@z14g2000cwz.googlegroups.com>

Chermside, Michael wrote:
> I'm trying to convert a string back into a datetime.date.
>
> First I'll create the string:
>
>
> Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)]
on
> win32
> Type "help", "copyright", "credits" or "license" for more
information.
> >>> import time, datetime
> >>> a_date = datetime.date.today()
> >>> s = str(a_date)
> >>> print s
> 2005-02-04
>
> Now I convert it back:
>
> >>> new_date = datetime.date.fromtimestamp(
> ...     time.mktime(time.strptime(s, '%Y-%m-%d')))
> >>> new_date
> datetime.date(2005, 2, 4)
>
>
> WOW, that's ugly. Is there a more concise way to do this?

datetime.date(*map(int, s.split("-")))



From tzot at sil-tec.gr  Thu Feb 24 11:39:39 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 24 Feb 2005 18:39:39 +0200
Subject: duplicate file finder (was: how can I make this script shorter?)
References: <cveqr1$a47$1@mughi.cs.ubc.ca>
	<nftl11tfimccjktktnj7oohbcvkfcjpe7f@4ax.com>
	<cvhjvj$142$1@mughi.cs.ubc.ca>
Message-ID: <3vvr11dvtbu030065pj9ptmj1i2eelodq8@4ax.com>

On Wed, 23 Feb 2005 01:56:02 -0800, rumours say that Lowell Kirsh
<lkirsh at cs.ubc.ca> might have written:

>Good idea about hashing part of the file before comparing entire files. 
>It will make the script longer but the speed increase will most likely 
>make it worth it.

My dupefind module was one of the first modules I wrote in python (it was a
shell script once...), so it's not appropriate to post.  However, rewriting it
was in my RSN list; after your post, I said, "what the heck" :)

I wouldn't describe it as /clean/ Python code, so any comments on style,
methodology (and of course, bugs!) are mostly welcome.  If you have any ideas
how to make it more "Pythonic" in style, perhaps we can even send it to ASPN.
On the upside, it's a good demo of Python dynamism and therefore power.

All first spaces are converted to pipe symbols to keep code indents, and sorry
for the assignment operators lacking spacing at the left, but it helped me know
what I meant in C, so I kept the habit in Python.



"""dupefinder.py -- a module to find duplicate files.

find_duplicate_files(*paths):
.   A function returning an iterable of lists of duplicate files
.   To be used as
.   for duplicate_files in dupefinder.find_duplicate_files(dir1, dir2...):
.       # process every group of duplicates
"""

import os, md5, errno, sys

IGNORED_ERROR_CODES= frozenset( [errno.EACCES, errno.ENOENT] )

class File(object):
.   """A wrapper for files to facilitate their comparison.
.   
.   Interface:
.   -   .get_hash(level) returns appropriate key for the current cmp level
.   -   .filename
.   -   .size"""

.   __slots__= "filename", "size", "_hashes",

.   def __init__(self, filename):
.       self.filename= filename
.       self.size= os.path.getsize(filename)
.       if self.size == 0:
.           self._hashes= [0, None, None]
.       else:
.           self._hashes= [self.size]

.   def __repr__(self):
.       return "%s('%s')" % (self.__class__.__name__, self.filename)

.   def get_hash(self, level):
.       """Return appropriate key for level of comparison.
.       level == 0 returns file size
.       level == 1 returns hash of first few kb
.       level == 2 returns md5 sum of whole file"""
.       if level >= len(self._hashes):
.           if 1 <= len(self._hashes):
.               self._hashes.append(self._get_partial_hash())
.           if 2 <= len(self._hashes):
.               self._hashes.append(self._get_full_hash())
.       return self._hashes[level]

.   def _get_partial_hash(self):
.       fp= open(self.filename)
.       try:
.           return hash(fp.read(8192))
.       finally:
.           fp.close()

.   def _get_full_hash(self):
.       fp= open(self.filename, "rb")
.       full_hash= md5.new()
.       while 1:
.           data= fp.read(65536)
.           if not data: break
.           full_hash.update(data)
.       fp.close()
.       return full_hash.digest()

class GenericFilesDict(dict):
.   """A virtual wrapper for the dictionaries of file comparisons.
.   Not to be used on its own, but through subclassing.
.   
.   Each subclass should define a _level class attribute to be used with the
.   File.get_hash method, and a _next_class attribute pointing to the class
.   managing the next level comparisons."""
.   __slots__= ()

.   def add_file(self, fileobj):
.       """Add a File object to self keyed by the appropriate key based on
.       self._level. If another file object exists in the same spot, replace it
.       by a _next_level_class instance containing the pre-existing and new file
.       obj."""

.       this_hash= fileobj.get_hash(self._level)

.       try:
.           result = self[this_hash]
.       except KeyError:
.           self[this_hash]= fileobj
.           return

.       try: # there was something in slot [this_hash]
.           result.add_file(fileobj) # so add fileobj to it
.       except AttributeError: # it has no add_file method, so it's a File
.           _= self[this_hash]= self._next_class() # make an instance
.           _.add_file(result) # add pre-existing
.           _.add_file(fileobj) # add new

.   def __repr__(self):
.       return "%s%s" % (self.__class__.__name__, dict.__repr__(self))

.   def __iter__(self):
.       "Return all instances of SameFiles (subclass of list)."
.       for item, value in self.iteritems():
.           try: _next_class= value._next_class
.           except AttributeError: continue
.           if _next_class is None:
.               yield value
.           else:
.               for item in value:
.                   yield item

class SameFiles(list):
.   "A list of duplicate files."
.   __slots__= ()
.   _level= 3
.   _next_class= None # search stops here

.   def add_file(self, fileobj):
.       self.append(fileobj)

class FilesByFullHash(GenericFilesDict):
.   """A dictionary keyed on md5 hash of whole file.

.   The algorithm assures that all File objects in this dict
.   have the same size and the same hash of first few kiB."""
.   __slots__= ()
.   _level= 2
.   _next_class= SameFiles

class FilesByPartialHash(GenericFilesDict):
.   """A dictionary keyed on hosh of first few kiB of file.

.   The algorithm assures that all File objects in this dict
.   have the same size."""
.   __slots__= ()
.   _level= 1
.   _next_class= FilesByFullHash

class FilesBySize(GenericFilesDict):
.   """A dictionary keyed on file size."""
.   __slots__= ()
.   _level= 0
.   _next_class= FilesByPartialHash

def find_duplicate_files(*directories):
.   """Find all duplicate files in the specified directories.

.   The returned object can be iterated on, yielding a list of
.   duplicate files every time."""
.   dupefinder= FilesBySize()
##  count= 0
.   for path in directories:
.       for dirname, dirnames, filenames in os.walk(path):
.           for filename in filenames:
.               try:
.                   dupefinder.add_file(File(os.path.join(dirname, filename)))
.               except EnvironmentError, exc:
.                   if exc.errno not in IGNORED_ERROR_CODES: # deleted or b0rken
symlink
.                       raise
##              count += 1
##              if count & 15 == 0:
##                  sys.stderr.write("\r%d" % count)

.   return dupefinder

def pprint(obj, level=0):
.   """For testing purposes."""
.   indent= "  "*level
.   if isinstance(obj, File):
.       print `obj`
.   elif isinstance(obj, list):
.       print "list"
.       for subobj in obj:
.           print indent, "-", repr(subobj)
.   else:
.       print obj.__class__.__name__
.       for key, subobj in obj.iteritems():
.           print indent, "+(%r)" % key,
.           pprint(subobj, level+1)

if __name__=="__main__":
.   result= find_duplicate_files(*sys.argv[1:])
.   import pprint
.   for group in result:
.       pprint.pprint(group)

-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From pu at luxemburg.lu  Fri Feb 25 16:26:02 2005
From: pu at luxemburg.lu (Patrick Useldinger)
Date: Fri, 25 Feb 2005 22:26:02 +0100
Subject: fdups: calling for beta testers
Message-ID: <421f97eb$1@news.vo.lu>

Hi all,

I am looking for beta-testers for fdups.

fdups is a program to detect duplicate files on locally mounted 
filesystems. Files are considered equal if their content is identical, 
regardless of their filename. Also, fdups ignores symbolic links and is 
able to detect and ignore hardlinks, where available.

In contrast to similar programs, fdups does not rely on md5 sums or 
other hash functions to detect potentially identical files. Instead, it 
does a direct blockwise comparison and stops reading as soon as 
possible, thus reducing the file reads to a maximum.

fdups has been developed on Linux but should run on all platforms that 
support Python.

fdups' homepage is at http://www.homepages.lu/pu/fdups.html, where 
you'll also find a link to download the tar.

I am primarily interested in getting feedback if it produces correct 
results. But as I haven't been programming in Python for a year or so, 
I'd also be interested in comments on code if you happen to look at it 
in detail.

Your help is much appreciated.

-pu


From frans.englich at telia.com  Tue Feb  1 00:31:16 2005
From: frans.englich at telia.com (Frans Englich)
Date: Tue, 1 Feb 2005 05:31:16 +0000
Subject: variable declaration
In-Reply-To: <cke3d2-i4k.ln1@lairds.us>
References: <mailman.1645.1107188128.22381.python-list@python.org>
	<1gr9ltj.1tiisn018pnse6N%aleaxit@yahoo.com>
	<cke3d2-i4k.ln1@lairds.us>
Message-ID: <200502010531.16765.frans.englich@telia.com>

On Tuesday 01 February 2005 05:08, Cameron Laird wrote:

> We learned long ago to treat you, Alex, as an exception.
> While it's rather unpythonic to have implicit rules, let's
> forgive Robert for failing to mention the one that regards
> you as an outlier for inferential purposes.

Excellent timing! I thought I would miss the next episode of "Xah Lee -- will 
you flee?" but I think I will manage to zap back in time.

You see, my friends think I am different from them when I ignore the soap 
operas on TV, to go for the daily read of python-list. They couldn't be more 
wrong.


Cheers,

		Frans




From deetsNOSPAM at web.de  Thu Feb  3 09:20:37 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Thu, 03 Feb 2005 15:20:37 +0100
Subject: Python-list Digest, Vol 17, Issue 54
References: <20050203134542.CC5741E4009@bag.python.org>
	<mailman.1814.1107439832.22381.python-list@python.org>
Message-ID: <36eq43F4sdgp6U1@individual.net>

Hi,

first of all - please quote appropriately - especially if you receive the
postings as digest. That prevents the signal-to-noise-ratio dropping to
unknown lows...

> Your responses will give me the required lifetime for my variables, but
> not the required access at all levels of code (unless req is a global
> variable?).
> 
> Do you have any other suggestions as to how this might be implemented?

If the code you showed us _is_ what you use - then req seems to be a global
variable. Otherwise it won't work. 


-- 
Regards,

Diez B. Roggisch


From ncoghlan at iinet.net.au  Sat Feb  5 11:58:40 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 06 Feb 2005 02:58:40 +1000
Subject: changing local namespace of a function
In-Reply-To: <cu2qlm$34d$1@joe.rice.edu>
References: <cu0lru$8ik$1@joe.rice.edu>	<cu0sj5$sfk$1@sea.gmane.org>	<4204400C.5060608@iinet.net.au>	<mailman.1948.1107575575.22381.python-list@python.org>	<cu1l9o$3oq$1@joe.rice.edu>	<mailman.1962.1107593815.22381.python-list@python.org>
	<cu2qlm$34d$1@joe.rice.edu>
Message-ID: <4204FB40.3030505@iinet.net.au>

Bo Peng wrote:
> I can not say enough thank you for this.

Don't thank me, thank Guido. He created the property machinery - I just let you 
know it was there :)

But yes, Python's OO is OO the way it should be - something that helps you get 
the job done quickly and cleanly, rather than making you jump through irrelevant 
hoops.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From toby at rcsreg.com  Thu Feb 24 11:29:59 2005
From: toby at rcsreg.com (Tobiah)
Date: Thu, 24 Feb 2005 08:29:59 -0800
Subject: Font size
In-Reply-To: <4213e033$1@news.comindico.com.au>
References: <42126822@news.comindico.com.au>
	<ldzqyx6byqdw$.wt8smryc0t3.dlg@40tude.net>
	<42129ea1@news.comindico.com.au> <4213e033$1@news.comindico.com.au>
Message-ID: <1109262471.754d94cc3b3725c8b11ba4f02594dfab@teranews>


> from random import randint
> rand = randint(0,36)
> print rand


Don't forget about the double zero slot.

Tobiah


From maxwell at ldc.upenn.edu  Thu Feb 17 10:59:04 2005
From: maxwell at ldc.upenn.edu (maxwell at ldc.upenn.edu)
Date: 17 Feb 2005 07:59:04 -0800
Subject: Problem using/installing numarray
In-Reply-To: <mailman.2743.1108627420.22381.python-list@python.org>
References: <1108609122.631534.50720@g14g2000cwa.googlegroups.com>
	<mailman.2743.1108627420.22381.python-list@python.org>
Message-ID: <1108655943.970937.101970@f14g2000cwb.googlegroups.com>

Thanks, that explains why the CygWin Python will not import the .pyd
files:

>>> imp.get_suffixes()
[('.dll', 'rb', 3), ('module.dll', 'rb', 3), ('.py', 'U', 1), ('.pyc',
'rb', 2)]

Doesn't look like there's a way to get the CygWin Python to load .pyd
files.  So I guess I have to figure out why the build isn't working...



From smitty_one_each at bigfoot.com  Fri Feb 25 07:50:33 2005
From: smitty_one_each at bigfoot.com (Chris Smith)
Date: Fri, 25 Feb 2005 07:50:33 -0500
Subject: automatic nesting and indentation in emacs
References: <c4b57fd0.0502250230.707e5950@posting.google.com>
	<k6owvs0n.fsf@python.net>
Message-ID: <upsyoby7a.fsf@bigfoot.com>

>>>>> Thomas Heller <theller at python.net> writes:

    > porterboy76 at yahoo.com (porterboy) writes:
    >> CONTEXT: I am using Emacs to edit Python code and sometimes
    >> also Matlab code.  When I hit <return> in a loop of some sort,
    >> Emacs usually gets the nesting indentation right, which is
    >> particularly important in Python.  To ensure this I have used
    >> python-mode.el and matlab.el modes in emacs.
    >> 
    >> QUESTION: If I suddenly decide I want an outer loop, do I have
    >> to manually readjust the indentation of all the inner loops? Or
    >> can emacs do it automatically? I know the Matlab in-built
    >> editor has a tool called "smart-indent" which will
    >> automatically align highlighted text to have the correct
    >> indentation. Does Emacs have something similar?

    > Mark the lines to be readjusted, then hit 'C-c >' or 'C-c <'.
    > Or hit 'C-h m' to get an overview for Python mode.

    > Thomas
I've liked the XEmacs python mode, as it is doesn't trigger the nasty
readline dependency.  Possibly fixed.
At any rate, with a region selected, "C-c >" and "C-c <" do the
obvious.
Two other killer features of the One True Editor are rectangles,
e.g. "C-x r o" with a highlighted region, align-regexp, and registers.
Three!  Three killer features of TOTE are rectangles, align-regexp,
registers, and PyMacs.
Oh! I'll just give up on the feeble Spanish Inquisition reference and
send you to http://www.emacswiki.org , where these and other righteous
goodies will, indeed, sanctify you within the bosom of the only editor
that has its own house of worship.
Best,
Chris


From siona at chiark.greenend.org.uk  Tue Feb 22 07:32:12 2005
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 22 Feb 2005 12:32:12 +0000 (GMT)
Subject: Problem with the sort() function
References: <64827323f7134aea810788b3ec6cf516@localhost.talkaboutprogramming.com>
	<mailman.2928.1109066131.22381.python-list@python.org>
	<7204a5f80386fadd1afa4bc2509be849@localhost.talkaboutprogramming.com>
Message-ID: <iRz*tMSHq@news.chiark.greenend.org.uk>

clementine <kashmira_v_phalak at yahoo.com> wrote:
>Thanx Nick...I forgot to mention im using python 2.2 and along with a host
>of other things it doesnt seem to have the enumarate built in function
>:(:(:(...is it possible to replace it by something else? I dont think
>simulating it will be feasible....

Here's one I prepared earlier:

if sys.version_info < (2,3):
    def enumerate(l):
        return zip(range(len(l)), l)

which will suck somewhat on large lists compared to being able to
do it with iterators.

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From mahs at telcopartners.com  Thu Feb 17 16:04:51 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 17 Feb 2005 13:04:51 -0800
Subject: How to wrap a class's methods?
In-Reply-To: <4214fd15$0$44645$a1866201@visi.com>
References: <4214f167$0$44618$a1866201@visi.com>	<lcSdnQIG9cWZZ4nfRVn-vw@comcast.com>
	<4214fd15$0$44645$a1866201@visi.com>
Message-ID: <cv30o4$ikp$1@sea.gmane.org>

Grant Edwards wrote:
> On 2005-02-17, Steven Bethard <steven.bethard at gmail.com> wrote:
> 
> 
>>py> class C(object):
>>...     def f(self, *args):
>>...         print "f:", args
>>...     def g(self, *args):
>>...         print "g:", args
>>...
>>py> class D(C):
>>...     pass
>>...
>>py> class Wrapper(object):
>>...     def __init__(self, func):
>>...         self.func = func
>>...     def __call__(self, *args):
>>...         print "wrapped"
>>...         return self.func(*args)
>>...
>>py> for name in ['f', 'g']:
>>...     wrapper = Wrapper(getattr(C, name))
>>...     setattr(D, name, new.instancemethod(wrapper, None, D))
> 
> 
> Thanks.  The stuff provided by the "new" module is what I was
> missing.
> 
No magic in the 'new' module - new.instancemethod is just a synonym for the 
method type:

  >>> import new, types
  >>> new.instancemethod is types.MethodType
True

Michael



From m.bless at gmx.de  Sun Feb 13 17:09:29 2005
From: m.bless at gmx.de (Martin Bless)
Date: Sun, 13 Feb 2005 23:09:29 +0100
Subject: Second posting - Howto connect to MsSQL
References: <iyMPd.4612$ZZ.1645@newssvr23.news.prodigy.net>
Message-ID: <tpjv015sh4muurqc47l4q86mmcrj3ri117@4ax.com>

On Sun, 13 Feb 2005 17:57:34 GMT, John Fabiani <jfabiani at yolo.com>
wrote:

>Are there others using Python to connect MsSQL?

Hi,

direct your attention to
http://www.object-craft.com.au/projects/mssql/

I once tried it as a little test - it worked.

I would love to use it these days - unfortunately the (Windows)
binaries for Python24 are missing. Somebody succeeded in compiling?
Please let me know, if the binaries are somewhere out there.

mb - Martin



From cam.ac.uk at mh391.invalid  Fri Feb 25 07:42:12 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Fri, 25 Feb 2005 12:42:12 +0000
Subject: xhtml-print parser
In-Reply-To: <1109333074.548547.171090@f14g2000cwb.googlegroups.com>
References: <1109333074.548547.171090@f14g2000cwb.googlegroups.com>
Message-ID: <cvn6f6$pdv$1@gemini.csx.cam.ac.uk>

p.nagarajkumar at gmail.com wrote:

> my question is i have parsed the xhtml data stream using c

That's not a question. And this is a language for discussing
Python, not C.

> i need to diplay the content present in the command prompt as the data
> present in the webpage as links how it can be done?

http://www.catb.org/~esr/faqs/smart-questions.html
-- 
Michael Hoffman


From sjmachin at lexicon.net  Sun Feb 20 15:22:26 2005
From: sjmachin at lexicon.net (John Machin)
Date: 20 Feb 2005 12:22:26 -0800
Subject: exercise: partition a list by equivalence
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<1108814276.680736.264380@l41g2000cwc.googlegroups.com>
	<37pb5jF5fnfivU1@individual.net> <37ribcF5er80rU1@individual.net>
Message-ID: <1108930946.798235.274580@z14g2000cwz.googlegroups.com>


Reinhold Birkenfeld wrote:
> Reinhold Birkenfeld wrote:
>
> > My solution (which may not be the fastest or most effective, but
till
> > now is the shortest <wink> and it works):

[snip RB]
>
> A recursive solution (around twice as fast as the above, though very
> slow still...)
>
[snip RB2]
>
> Another one:
>

[snip RB3]

Dunno what data you are using for timing, but my tests suggest that RB
is fast enough, RB3 is slightly faster, but RB2 is a real dog and
appears to be quadratic [hint: it has that same for-for-for-update
signature found in phase 2 of Xah's effort]. Not only that, but it
seems to be somewhat irregular. Below are some results on trivial test
data:

prototype input: python -m timeit -s "import
merge;n=3000;inp=((x,x+1)for x in xrange(0,n,2))"
"merge.merge_RB3(inp)"
100000 loops, best of 3: 3.98 usec per loop

n=3000;RB2  64.9 msec per loop
n=3000;RB3  3.98 usec per loop
n=3000;RB  3.06 usec per loop
n=3000;JM3  2.73 usec per loop

n=1000;RB2  4.92 usec per loop
n=1250;RB2  5.34 usec per loop
n=1500;RB2  20.4 usec per loop
n=1750;RB2  22.1 msec per loop
n=2000;RB2  28.8 msec per loop
n=2500;RB2  44.9 msec per loop
n=3000;RB2  64.9 msec per loop

[background: Python 2.4, Win2000, 1.4GHz Athlon chip, 768Mb memory]

Here's a function to generate some serious timing data:
!def mktimedata(n,lev):
!    res = []
!    d = 1
!    for k in range(lev):
!        res.extend(zip(xrange(0, n, 2*d), xrange(d, n, 2*d)))
!        d *= 2
!    return res

Try that with n=3000 and lev=5 ...

Cheers,
John



From a_nuther at geek.org  Mon Feb 21 23:23:50 2005
From: a_nuther at geek.org (a_nuther at geek.org)
Date: Tue, 22 Feb 2005 04:23:50 GMT
Subject: which parser to use
Message-ID: <87ll9hmdd6.fsf@subopt.house-net>


I'm building something that requires parsing a rather complex
language. I'd like to do the whole application, including the
lex/parse phase, in Python (for development/debug speed), and only
move parts of it to a compiled language if execution speed absolutely
dictates. So, what i'm looking for in a Python parser is:

    1) reliability (don't want to debug a parser)
    1) flexibility (i do a lot of refactoring)
    2) E/BNF friendliness (working from a spec)
    3) speed (moderate speed will do; glacial won't)

Does anyone have any familiarity with some of the several Python
parsers out there? Any pointers to comparisons (as opposed to surveys)
of _several_ of the Python parsers would be much appereciated. (I've
seen the YAPPS/Spark comparison.) If none of the Python parsers really
fit the bill, any thoughts on ANTLR, Spirit, etc?

Thanks in advance,
E



From steve at holdenweb.com  Thu Feb  3 07:56:25 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 03 Feb 2005 07:56:25 -0500
Subject: Basic file operation questions
In-Reply-To: <slrnd0459o.nde.michi@michi.si.eunet.at>
References: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
	<opsllt9r191js0xs@news.telkomsa.net>
	<mailman.1808.1107431422.22381.python-list@python.org>
	<slrnd0459o.nde.michi@michi.si.eunet.at>
Message-ID: <7hpMd.102687$Jk5.81732@lakeread01>

Michael.Lang at jackal-net.at wrote:

> In article <mailman.1808.1107431422.22381.python-list at python.org>, Peter Nuttall wrote:
> 
>>On Wed, Feb 02, 2005 at 11:47:41PM -0500, Caleb Hattingh wrote:
>>
>>>Hi Alex
>>>
>>>Assuming you have a file called "data.txt":
>>>
>>>***
>>>f = open('data.txt','r')
>>>lines = f.readlines()
>>>f.close()
>>>for line in lines:
>>>    print line
>>>***
>>>
>>
>>Can you not write this:
>>
>>f=open("data.txt", "r")
>>for line in f.readlines():
>>	#do stuff to line
>>f.close()
> 
> 
> sure you can 
> 
> f = open("data.txt", "rb")
> while [ 1 ]:
> 	line = f.readlines()
> 	if not line:	break
> 	line = somethingelse ...
> f.close()
> 
Shall we charitably assume this was untested code? For a non-empty file 
it executes the loop body twice, once to read the whole content of the 
file and throw it away, the second time to do something else 
unspecified. The intention wasn't, therefore, entirely clear, but 
newbies should not be using it as any kind of model.

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From JoshuaACohen at gmail.com  Tue Feb  8 15:32:43 2005
From: JoshuaACohen at gmail.com (Josh)
Date: 8 Feb 2005 12:32:43 -0800
Subject: Reportlab and Barcodes
Message-ID: <1107894763.331701.26470@c13g2000cwb.googlegroups.com>

Hi All,

I need someone to explain to me how to output a Code39 barcode to a
Reportlab PDF. As far as I can tell, there is no means to do this with
the Canvas object, and the demo that is included with the libraries is
using the platypus Frame to place the barcode on the form. I do not
wish to use this method. I'm guessing that it needs to be placed on the
form as some type of graphic. It's obviously not going to work with the
drawText method. Any ideas? 

Thanks

Josh



From sjmachin at lexicon.net  Thu Feb  3 19:01:32 2005
From: sjmachin at lexicon.net (John Machin)
Date: 3 Feb 2005 16:01:32 -0800
Subject: Crashing Python interpreter! (windows XP, python2.3.4, 2.3.5rc1,
	2.4.0)
References: <mailman.1810.1107433431.22381.python-list@python.org>
Message-ID: <1107474970.119588.201320@o13g2000cwo.googlegroups.com>


Leeuw van der, Tim wrote:
> >
> >
> > -----Original Message-----
> > From: python-list-bounces+tim.leeuwvander=nl.unisys.com at python.org
on behalf of John Machin
> > Sent: Thu 2/3/2005 12:00 PM
> > To: python-list at python.org
> > Subject: Re: Crashing Python interpreter! (windows XP, python2.3.4,
2.3.5rc1,2.4.0)
> >
> >
> > Leeuw van der, Tim wrote:
> > >
> > >> > Do you have a file called drwtsn32.log anywhere on your
computer?
> > >
> > > No, unfortunately I cannot find such file anywhere on my
computer....
> > >
> > > What do I do to get such file? Or anything equally useful?
> > >
> >
> > On my Windows 2000 box, just crash something :-)
> >
> >
> > Perhaps this may help:
> >
> >
http://www.windowsnetworking.com/kbase/WindowsTips/Windows2000/RegistryTips/RegistryTools/DrWatson.html
> >
>
> Using this URL, I found the log file and it's about 1Gb big...

Yeah, well, it's a *LOG* file -- unless you fiddle with the registry
settings (not recommended), you get one lot of guff per crash. But 1
Gb????

> I'll have to find out what is the useful part of it (or remove it and
crash again).

The useful part would be the tail of the file. Remove it? It may
contain evidence useful for other problems (that you didn't know you
were having). Try rename.

> I don't know why searching all drives using windows 'search' did not
find the file!

Possibilities:
1. You have a virus that renames the drwtsn32.log file for the duration
of a search.
2. Emanations from UFOs are affecting computer circuitry in your
neighbourhood.
3. Microsoft programmers stuffed up.
4. You had a typo.

>
> When I have a usefull crashdump, what should I do? Attach to e-mail
and post it here?

You could eyeball it to see if it gave you a clue first. Failing that,
just post a copy of the part(s) from just ONE crash that look something
like this:

*----> Stack Back Trace <----*

FramePtr ReturnAd Param#1  Param#2  Param#3  Param#4  Function Name
0012D6F8 77F8819B 7803A700 7C34F639 7803A730 7C36B42C
ntdll!RtlpWaitForCriticalSection
0012D73C 1E0A73CE 7803A710 00000000 00AE0900 00000000
ntdll!ZwCreateThread
7C36C576 E87C3822 FFFD5D89 E80C75FF FFFE3081 FC658359
!PyTime_DoubleToTimet
B8680C6A 00000000 00000000 00000000 00000000 00000000 <nosymbols>


> Should I include the user.dmp file too?

Look at it; how big is it? [my latest is 13MB for @#$% sake] Is it in
ascii or binary? Does it look useful? What proportion of people who get
this newsgroup/mailing-list via *E-MAIL* will be overjoyed to receive
it?
Are you sure you will not be splattering company-confidential data all
over the Internet?

>
> Should I do the same for both python 2.3.5r1 and python 2.4? Or is it
sufficient to do so for Python 2.4?

If you are sending only stack back trace snippets as above, then send
both just in case they are different.



From jeffrey.borkent at adelaide.edu.au  Sun Feb  6 23:23:08 2005
From: jeffrey.borkent at adelaide.edu.au (Jeffrey Borkent)
Date: Mon, 07 Feb 2005 14:53:08 +1030
Subject: def __init__ question in a class definition
Message-ID: <1107750187.3795.9.camel@batfink.its.adelaide.edu.au>

Hi There,

I have an open source program which i am trying to add to.

class classname(member,member)

	def __init__(self,list)
		self.__list = list
		self.refresh = 360

my question is what is the __ (double underscore) represent, if
anything, in this bliock of assignmeents? I wish to add some more names
but do not know if i need the __ or not?

IE: is there any special significance to the __ in this case.

Cheers






-- 
Jeffrey Borkent
Systems Specialist
Information Technology Services
University of Adelaide
Level 7, 10 Pultney Street
Adelaide. 5005
Ph: 8303 3000
jeffrey.borkent at adelaide.edu.au


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From zsolt-googleP6463 at mailblocks.com  Thu Feb 17 17:48:31 2005
From: zsolt-googleP6463 at mailblocks.com (pythonUser_07)
Date: 17 Feb 2005 14:48:31 -0800
Subject: [Fwd: Re: [Uuu-devel] languages] <-- Why Python
In-Reply-To: <mailman.2783.1108679758.22381.python-list@python.org>
References: <mailman.2781.1108677768.22381.python-list@python.org>
	<1108678805.542584.171930@z14g2000cwz.googlegroups.com>
	<mailman.2783.1108679758.22381.python-list@python.org>
Message-ID: <1108680511.518929.242210@z14g2000cwz.googlegroups.com>

I see your point.

Consider points 2 and 3 a nice side effect.

The language I favor actually ties into the environment I am working
in: Python for rapid prototyping, java for larger projects where the
eclipse IDE comes in very handy.



From justscott at gmail.com  Mon Feb 14 15:48:44 2005
From: justscott at gmail.com (Scott  Whitney)
Date: 14 Feb 2005 12:48:44 -0800
Subject: [Errno 18] Invalid cross-device link using os.rename
Message-ID: <1108414124.890402.109480@z14g2000cwz.googlegroups.com>

oldName=/backup/backups/data/WWW_httpd.conf_backups/20050204.httpd.conf

newName=/backup_old/data/WWW_httpd.conf_backups/20050204.httpd.conf

os.rename(oldName,newName) gives:

OSError: [Errno 18] Invalid cross-device link

mv from the shell works fine.

This is Python 2.2.3 from RedHat 9.0.

Any suggestions (other than os.system('mv %s %s')?)



From alexander.dietz at mpi-hd.mpg.de  Wed Feb 16 10:08:17 2005
From: alexander.dietz at mpi-hd.mpg.de (alex)
Date: 16 Feb 2005 07:08:17 -0800
Subject: Test for structure
Message-ID: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>

Hi there,

how can I check if a variable is a structure (i.e. a list)? For my
special problem the variable is either a character string OR a list of
character strings line ['word1', 'word2',...]

So how can I test if a variable 'a' is either a single character string
or a list? I tried:

if a is list:


but that does not work. I also looked in the tutorial and used google
to find an answer, but I did not.

Has anyone an idea about that?

Alex



From mirandacascade at yahoo.com  Sun Feb 20 09:45:11 2005
From: mirandacascade at yahoo.com (mirandacascade at yahoo.com)
Date: 20 Feb 2005 06:45:11 -0800
Subject: introspection inquiry
Message-ID: <1108910710.985704.264430@c13g2000cwb.googlegroups.com>

Where in the language would one find the intropsection capability to
answer the question: what class am I in?

Example:

class ExistentialCrisis:
    def __init__(self, text):
        self.spam = text
        print 'In the constructor of the %s class' % <whatever>

When the constructor method is invoked, would like to see the following
message:

In the constructor of the ExistentialCrisis class

and I would like to be able to do it without substituting the literal
string 'ExistentialCrisis' for <whatever>.

My question is this: what can be substituted for <whatever> that will
make the example above work?



From dan.gass at gmail.com  Fri Feb 25 13:42:10 2005
From: dan.gass at gmail.com (dan.gass at gmail.com)
Date: 25 Feb 2005 10:42:10 -0800
Subject: wanted: C++ parser written in Python
In-Reply-To: <mukr11t39khpd8od53im9jic3s6qjcl3j2@4ax.com>
References: <mukr11t39khpd8od53im9jic3s6qjcl3j2@4ax.com>
Message-ID: <1109356930.827462.167680@g14g2000cwa.googlegroups.com>

You can look at the techniques and regular expressions in the
testgen.c.unit test module that is part of a generic test framework
called TestGen.  TestGen uses a parser to automatically stub / copy
functions for testing purposes.  The parser is capable of identifying
the function/method name as well as the parameters and return type.
The only caveat with using regular expressions is the function/method's
closing } must be in column zero.  If you figure out a different way to
get around the restriction or other improvements to the parser let me
know.

I'm about to release a newer version, but the area that you would be
looking at is not changing so I would go ahead and download the latest
that is there.  TestGen can be found at
sourceforge.net/projects/testgen

Regards,
Dan Gass



From cam.ac.uk at mh391.invalid  Sat Feb 12 08:52:31 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sat, 12 Feb 2005 13:52:31 +0000
Subject: Alternative to raw_input ?
In-Reply-To: <mailman.2407.1108145024.22381.python-list@python.org>
References: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>	<mailman.2400.1108139722.22381.python-list@python.org>	<w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>
	<mailman.2407.1108145024.22381.python-list@python.org>
Message-ID: <cul1n1$8t8$1@gemini.csx.cam.ac.uk>

Skip Montanaro wrote:

> How about modifying it to
> 
>     raw_input("Press ENTER to continue ")

You want him to just capitalize ENTER in the current message?
-- 
Michael Hoffman


From apardon at forel.vub.ac.be  Thu Feb 10 03:32:19 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 10 Feb 2005 08:32:19 GMT
Subject: strange behaviour with decorators.
References: <mailman.2275.1107986708.22381.python-list@python.org>
Message-ID: <slrnd0m70j.26q.apardon@rcpc42.vub.ac.be>

Op 2005-02-09, Delaney, Timothy C (Timothy) schreef <tdelaney at avaya.com>:
> Antoon Pardon wrote:
>
>> Ah, yes, the penny dropped. The try: except where there because
>> originally there were other statements I wanted to test and I
>> didn't want the raise exception by the inc(-2) stop the script.
>> I completely forget to consider it would also catch the
>> error I was expecting.
>
> A very good example of why you should (almost) never use a bare except:
> ...
>

Well in this case I would say the fault was not with the bare except:
The intention was to put the following.

except:
  print sys.excepthook(*sys.exc_info())


But I always forget this idiom, one with full "except" the other
abrviated to "exc", one in one word the other with an underscore
I always forget which is which and being in a hurry I just put
a pass thinking I would look it up and replace it later.

But before I did so I tested it a first time and was so surprised
I forgot.


From eugene at boardkulture.com  Sun Feb  6 01:17:44 2005
From: eugene at boardkulture.com (EuGeNe)
Date: Sun, 06 Feb 2005 07:17:44 +0100
Subject: bicyclerepairman python24 windows idle :(
In-Reply-To: <1107577226.960946.106580@l41g2000cwc.googlegroups.com>
References: <cu0f45$knq$1@aphrodite.grec.isp.9tel.net>
	<1107577226.960946.106580@l41g2000cwc.googlegroups.com>
Message-ID: <cu4csf$d22$1@apollon.grec.isp.9tel.net>

Kim Changjune wrote:
> EuGeNe wrote:
> 
>>Hi there,
>>
>>I am no expert but wanted to give bicyclerepairman 0.9 a go just to
> 
> see
> 
>>what a refactoring browser is and does. Followed every step of the
>>install, I think, but idle doesn't start with the RepairMan section
> 
> in
> 
>>config-extensions.def ... is it incompatible with 2.4?
>>
>>Thanks for your help.
>>
>>--
>>EuGeNe
> 
> 
> There seems to be a change in idlelib in Python 2.4.
> 
> Apply following patch to BicycleRepairMan_Idle.py:
> 
> @@ -87,6 +87,7 @@
>              mbar = editwin.menubar
>              editwin.menudict[name] = menu = Menu(mbar, name = name)
>              mbar.add_cascade(label = label, menu = menu, underline =
> underline)
> +            self.editwin.fill_menus(self.menudefs)
> 
>              # Initialize Bicyclerepairman and import the code
>              path = self.editwin.io.filename
> 

sorry but it didn't make any difference ... idle doens't start :(

-- 
EuGeNe

[----
www.boardkulture.com
www.actiphot.com
www.xsbar.com
----]


From apardon at forel.vub.ac.be  Mon Feb 28 04:37:41 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 28 Feb 2005 09:37:41 GMT
Subject: Why do descriptors (and thus properties) only work on
	attributes.
References: <slrnd25nve.d87.apardon@rcpc42.vub.ac.be>
	<7xoee5kpiv.fsf@ruckus.brouhaha.com>
Message-ID: <slrnd25pj4.d87.apardon@rcpc42.vub.ac.be>

Op 2005-02-28, Paul Rubin schreef <http>:
> Antoon Pardon <apardon at forel.vub.ac.be> writes:
>> Can anyone explain why descriptors only work when they are an attribute
>> to an object or class.  I think a lot of interesting things one can
>> do with descriptors would be just as interesting if the object stood
>> on itself instead of being an attribute to an other object.
>
> How would that work?

Well AFAIU a descriptor is an object with at least one method out of
__get__, __set__ or __del__. I don see why implicitly calling one
of these methods would be any more difficult when they are autonomous
objects than when they are attributes.

-- 
Antoon Pardon


From steven.bethard at gmail.com  Thu Feb 10 15:39:29 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 10 Feb 2005 13:39:29 -0700
Subject: namespaces module (a.k.a. bunch, struct, generic object, etc.)
 PEP
In-Reply-To: <pan.2005.02.10.15.10.26.594432@jerf.org>
References: <GaudndOHLML3M5bfRVn-vg@comcast.com>
	<pan.2005.02.10.15.10.26.594432@jerf.org>
Message-ID: <tdidnQsgbbTiW5bfRVn-pA@comcast.com>

Jeremy Bowers wrote:
> On Thu, 10 Feb 2005 11:56:45 -0700, Steven Bethard wrote:
>> In the "empty classes as c structs?" thread, we've been talking in some
>> detail about my proposed "generic objects" PEP.  Based on a number of
>> suggestions, I'm thinking more and more that instead of a single
>> collections type, I should be proposing a new "namespaces" module instead.
> 
> Context: I've never been excited by this proposal.
> 
> But I am intrigued to note that with a couple of differences, you've now
> converged on a module I've already written for my own use, which I called
> a Registry.

Yeah, I guess that was really the motivation of this module.  I 
personally wouldn't use it all that often -- certainly not with the 
frequency that I use, say, Python 2.4's set type -- but I think there 
are enough of us out here who have written essentially the same module 
enough times that it merits a little bit of standardization and addition 
to the standard library.

Steve


From mark at freelance-developer.com  Wed Feb  2 14:44:26 2005
From: mark at freelance-developer.com (Mark Nenadov)
Date: Wed, 02 Feb 2005 14:44:26 -0500
Subject: Finding user's home dir
References: <5i9rtc.rq31.ln@orion.homeinvalid>
Message-ID: <pan.2005.02.02.19.44.26.248863@freelance-developer.com>

On Wed, 02 Feb 2005 19:26:00 +0000, Nemesis wrote:

> Please, could you test it on your systems and tell me what you got?
> I'd like to know what it returns on different operating systems because
> I'm developing a multiplatform software.
> 
> Thank you all.

I tried your function in my environment (Python 2.3.3 on Linux) and it
returned the home directory properly

- -
Mark Nenadov
Python Byte Solutions
http://www.pythonbyte.com/


From alan.mcintyre at esrgtech.com  Fri Feb 11 21:16:24 2005
From: alan.mcintyre at esrgtech.com (Alan McIntyre)
Date: Fri, 11 Feb 2005 21:16:24 -0500
Subject: listerator clonage
In-Reply-To: <mailman.2429.1108173429.22381.python-list@python.org>
References: <mailman.2429.1108173429.22381.python-list@python.org>
Message-ID: <0GdPd.106654$Jk5.83039@lakeread01>

Cyril,

Here's some code that (I think) does what you want:

l = [1, 7, 3, 4, 3, 2, 1]
s, dups = set(), set()
for x in i:
     if x in s:
         dups.add(x)
     s.add(x)

print dups


I'm sure there are more elegant ways to do it, but this seemed to be the 
most straightforward way I could think of.

Hope this helps,
Alan McIntyre
ESRG LLC
http://www.esrgtech.com


Cyril BAZIN wrote:
> Hello, 
> 
> I want to build a function which return values which appear two or
> more times in a list:
> 
> So, I decided to write a little example which doesn't work:
> #l = [1, 7, 3, 4, 3, 2, 1]
> #i = iter(l)
> #for x in i:
> #    j = iter(i)
> #    for y in j:
> #        if x == y:
> #            print x
> 
> In thinked that the instruction 'j= iter(i)' create a new iterator 'j'
> based on 'i' (some kind of clone). I wrote this little test which show
> that 'j = iter(i)' is the same as 'j = i' (that makes me sad):
> 
> #l = [1, 7, 3, 4, 2]
> #i = iter(l)
> #j = iter(i)
> #k = i
> #i, j, k
> (<listiterator object at 0x02167B50>, <listiterator object at
> 0x02167B50>, <listiterator object at 0x02167B50>)
> 
> Just in order to test, I wrote these little test:
> #l = [1, 7, 3, 4, 2]
> #i = iter(l)
> #import pickle
> #j = pickle.loads(pickle.dumps(i))
> Traceback (most recent call last):
>   File "<input>", line 1, in ?
>   File "C:\Python24\lib\pickle.py", line 1386, in dumps
>     Pickler(file, protocol, bin).dump(obj)
>   File "C:\Python24\lib\pickle.py", line 231, in dump
>     self.save(obj)
>   File "C:\Python24\lib\pickle.py", line 313, in save
>     rv = reduce(self.proto)
>   File "C:\Python24\lib\copy_reg.py", line 69, in _reduce_ex
>     raise TypeError, "can't pickle %s objects" % base.__name__
> TypeError: can't pickle listiterator objects
> 
> #import copy
> #j = copy.copy(i)
> Traceback (most recent call last):
>   File "<input>", line 1, in ?
>   File "C:\Python24\lib\copy.py", line 95, in copy
>     return _reconstruct(x, rv, 0)
>   File "C:\Python24\lib\copy.py", line 320, in _reconstruct
>     y = callable(*args)
>   File "C:\Python24\lib\copy_reg.py", line 92, in __newobj__
>     return cls.__new__(cls, *args)
> TypeError: object.__new__(listiterator) is not safe, use listiterator.__new__()
> 
> So, I would like to know if there is a way to 'clone' a 'listiterator'
> object. I know that is possible in Java for example...
> 
> If it is impossible, have you better ideas to find duplicate entries
> in a list...
> 
> Thanks,
> 
> Cyril



From timh at zute.net  Sun Feb  6 06:17:44 2005
From: timh at zute.net (Tim Hoffman)
Date: Sun, 06 Feb 2005 19:17:44 +0800
Subject: WYSIWYG wxPython "IDE"....?
In-Reply-To: <1107560658.584623.303310@o13g2000cwo.googlegroups.com>
References: <1107560658.584623.303310@o13g2000cwo.googlegroups.com>
Message-ID: <4205fcd9@news.highway1.com.au>

Have you tried Boa Constructor ?

http://boa-constructor.sourceforge.net/


Simon John wrote:
> I'm writing my 2nd large wxPython program, and after the problems I
> found doing the first's layout in code, I'd like to look at using a
> 'WYSIWYG' IDE, like VisualStudio does for MFC.
> 
> I've tried a few that I found, wxGlade is probably the best, although
> it seems to be not 100% WYSIWYG (like the widgets in the preview are
> not much like the final program), wxDesigner has a horrid GUI for a GUI
> designer! VisualWX gave me the 'now what?' feeling when I started a new
> project.....
> 
> I find the sizer layout thing is what's holding these programs back, is
> there another wxWidgets layout system, so that I could just drag'n'drop
> widgets wherever I want in a window, more like Qt or MFC?
> 
> I'd like to just put a TextCtrl with a few buttons underneath it
> without having to create two boxsizers or a gridsizer!
> 
> I'd like to create something like the main XMMS (or Winamp) window:
> 
> http://xmms.org/files/Skins/images/winamp_x_xmms.png
> 
> But that would be a 3-way vertical sizer, a 2-way horizontal and a
> 2-way vertical at least just for the main (top left) window.
> 


From steven.bethard at gmail.com  Mon Feb  7 13:25:59 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 07 Feb 2005 11:25:59 -0700
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <mailman.2093.1107799636.22381.python-list@python.org>
References: <dvOMd.33656$EG1.19314@lakeread04>	<mailman.2034.1107725421.22381.python-list@python.org>	<cu7532$er8$01$1@news.t-online.com>
	<mailman.2093.1107799636.22381.python-list@python.org>
Message-ID: <6uSdnfAuvOkvL5rfRVn-3Q@comcast.com>

Francis Girard wrote:
> I'm very sorry that there is no good use case for the "reduce" function in 
> Python, like Peter Otten pretends. That's an otherwise very useful tool for 
> many use cases. At least on paper. 

Clarity aside[1], can you give an example of where reduce is as 
efficient as the eqivalent loop in Python?

Steve

[1] I generally find most reduce solutions much harder to read, but 
we'll set aside my personal limitations for the moment. ;)


From ncoghlan at iinet.net.au  Wed Feb  2 02:36:04 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Wed, 02 Feb 2005 17:36:04 +1000
Subject: how to separate hexadecimal
In-Reply-To: <2cad2090050201232427cb97f2@mail.gmail.com>
References: <2cad209005020123107fb43105@mail.gmail.com>
	<2cad2090050201232427cb97f2@mail.gmail.com>
Message-ID: <420082E4.7020605@iinet.net.au>

jrlen balane wrote:
> i have a 4 digit hex number (2 bytes) and i want to separate it into 2
> digit hex (1 byte each) meaning i want to get the upper byte and the
> lower byte since i am going to add this two.
> how am i going to do this?
> should i treat it just like a normal string?
> please help, thanks.
> 
> ex. hexa = '0x87BE"  # what i want to do is:
>       a = 0x87, b = 0xBE    # so that i could do this:
>       c = a + b            #which should be equal to 0x145

divmod does what you want:

Py> val = 0x87be
Py> hi, lo = divmod(val, 0x100)
Py> hex(hi), hex(lo)
('0x87', '0xbe')
Py> hex(hi + lo)
'0x145'

Cheers,
Nick.


-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From steven.bethard at gmail.com  Tue Feb 15 11:24:03 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 15 Feb 2005 09:24:03 -0700
Subject: Copying data between file-like objects
In-Reply-To: <pan.2005.02.15.09.01.29.555879@ID-174572.user.uni-berlin.de>
References: <pan.2005.02.15.09.01.29.555879@ID-174572.user.uni-berlin.de>
Message-ID: <O_KdnUOIV6i-v4_fRVn-jQ@comcast.com>

Thomas Lotze wrote:
> another question: What's the most efficient way of copying data between
> two file-like objects?
> 
> f1.write(f2.read()) doesn't seem to me as efficient as it might be, as a
> string containing all the contents of f2 will be created and thrown away.

You could try f1.writelines(f2).

Steve


From jerf at jerf.org  Thu Feb 17 22:27:11 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 17 Feb 2005 22:27:11 -0500
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<37hqlrF59l2b2U1@individual.net>
	<873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<421450CC.9080504@swiftdsl.com.au>
	<87psyz8h9o.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<4214A800.4010509@swiftdsl.com.au>
	<pan.2005.02.17.15.13.36.917107@jerf.org>
	<42155DAF.4010806@swiftdsl.com.au>
Message-ID: <pan.2005.02.18.03.27.10.730881@jerf.org>

On Fri, 18 Feb 2005 14:14:55 +1100, news.sydney.pipenetworks.com wrote:
> I always wished computer science was more engineering then philosophy. 
> That way there'd always be an obvious answer.

I hear that!

To be fair, computer *science* is more like mathematics than philosophy;
once a correctly-framed question has been asked there is only one answer,
or at least the answers are definite, or definite in their indefiniteness.
(For the most part.) 

We're programming here though, and there we are groping through the
formless void, arguing about whether my infinitesimal is better than your
infinitesimal. 

Sorry, I was Zenning it out too, I guess. :-)

By the way, just to be clear, my infinitesimal's dad can beat up your
infinitesimal's dad any day of the week.

(Looks like the Zen mood has passed...)


From jerf at jerf.org  Thu Feb 17 19:09:44 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 17 Feb 2005 19:09:44 -0500
Subject: Help with research
References: <1108684307.612656.92010@c13g2000cwb.googlegroups.com>
Message-ID: <pan.2005.02.18.00.09.44.250691@jerf.org>

On Thu, 17 Feb 2005 15:51:47 -0800, elena wrote:
> I can go to my friends, however it occurred to me that it might be
> better to post in a newsgroup and get a larger, more diverse, and
> random sample. 

Larger, yes, more diverse, yes, more random, probably not in the
statistical/scientific sense. Caveat emptor.


From tchur at optushome.com.au  Sat Feb 19 21:33:17 2005
From: tchur at optushome.com.au (Tim Churches)
Date: Sun, 20 Feb 2005 13:33:17 +1100
Subject: Fuzzy matching of postal addresses
In-Reply-To: <1108865819.020215.250110@o13g2000cwo.googlegroups.com>
References: <mailman.875.1106093219.22381.python-list@python.org>	<1108682472.028307.92060@o13g2000cwo.googlegroups.com>	<mailman.2791.1108709008.22381.python-list@python.org>
	<1108865819.020215.250110@o13g2000cwo.googlegroups.com>
Message-ID: <4217F6ED.1030901@optushome.com.au>

McBooCzech wrote:

>Sorry for my "Ferbl typo". 
>
No offense was caused, I was just joking.

>For the local anti-smoking campaign 
>
As a public health epidemiologist, that's the sort of application of our 
project I like to see! And judging by the reports by Martin Mcgee and 
colleagues at the European Public Health Observatory, such campaigns are 
sorely needed in most of eastern Europe. I am sure Vaclav Havel is 
convinced of the need for anti-smoking campaigns.

>I am
>trying to link some addresses which contain following "linkable"
>informations (data fields) only:
>
>RECORD_ID, Street + No., City, Post code,
>
>All data are now w/o Unicode characters. Do you think it possible to
>try to link it with Febrl w/o deep code modification?
>  
>
Yes.

>I did try to link our data but the result is just a plenty of warning
>messages but no links. What is your suggestion? Please understand I do
>not want to bother you with my questions. I am just asking you your
>comments or pointers before I will try to dig in to the code. You
>probably know some "tricks" in data organization or something like
>that, which can be much easier then code digging.
>
>I can send our CSVs to you (they are small, just about 3204 records in
>the A data-set and about 1241 records in the B data-set) and a log as
>well.
>
>I have tried to organized oru files as following:
>       FEBRL reqirements : Our data
>       ==============================
>                 'rec_id': RECORD_ID,
>             'given_name': ""
>                'surname': ""
>             'street_num': ""
>         'address_part_1': ""
>         'address_part_2': Street + No.
>                 'suburb': City
>               'postcode': Post code
>                  'state': ""
>          'date_of_birth': ""
>             'soc_sec_id': ""
>
>Thanks for your answer and suggestions
>  
>
We would be pleased to assist - but off-list. Please send the exact text 
of the error messages (the log) directly to Peter Christen and myself in 
the first instance. Further discussion of these applictaon-specific 
issues is not appropriate for the general Python list - but you could 
report back to the Python list on your overall experience after we have 
solved the problems with you.

Regards,

Tim C



From noelle.quemener at edf.fr  Mon Feb 21 09:10:34 2005
From: noelle.quemener at edf.fr (Noelle QUEMENER)
Date: Mon, 21 Feb 2005 15:10:34 +0100
Subject: Yet Another BLT/TkInter Install Question
Message-ID: <OF4CB07E84.AA75EF4B-ONC1256FAF.004DA49F-C1256FAF.004DE23C@notes.edfgdf.fr>

I have just installed BLT: I effectively had some problems - the same you had.
I found this:

Python GUI Setup

Here is the procedure I used to get "Fourier" working on Windows and Linux.

I wanted to use BLT for xy-plotting, partly because we used it with tcl in the sss project, and partly because I couldn't understand how to position the plots in wxPython (the
main alternative).

The only interface to BLT from Python seemed to be through Pmw (now it is claimed that you can get to BLT directly, but I haven't figured out how). So, I

    * Downloaded the most recent version of Python (2.2) into C:\Python22 (Windows)
    * Downloaded the required packages (Numeric, FFT, etc.) and noticed that they installed into C:\Python22\Lib\site-packages
    * Downloaded the corresponding release of Pmw into C:\Python22\Lib\site-packages

On the Debian Linux Windows system in B3 set up by Dan Freedman, this sufficed. On the CCMR RedHat system I've yet to get it to work. On Windows, I had to install the current
version of BLT. Following instructions from http://www.ifi.uio.no/~hpl/Pmw.Blt/doc/links.html, as suggested by Peter Brown at phbrown at acm.org, I

    * installed BLT into C:/Python22 using its installer: this made bin, include, and lib subdirectories of C:/Python22/tcl
    * copied the directory C:/Python22/tcl/lib/blt2.4 into C:/Python22/tcl/tcl8.3
    * copied the BLT DLL's into my PATH, specifically C:\Program Files\Tcl\bin.

Now my scripts worked on Windows. I now wished to roll them into a binary form that I could distribute. Chris Myers advised me to try the more advanced "Freeze" methods
developed at http://www.mcmillan-inc.com/install1.html. This took some time, until I read the documentation: on the first page of the Pmw documentation, it says that freezing
is tricky, and gives a link to doc/dynamicloader.html.

    * Downloaded the installer and installed it in the Fourier directory (Linux) or into C:\Python22\Lib\site-packages (Windows)
    * Make directory FourierFreeze in that same directory
    * Make Pmw.py in that directory: python ..\Pmw\Pmw_0_8_5\bin\bundlepmw.py ..\Pmw\Pmw_0_8_5\lib
    * copy Fourier.py, PmwBlt.py and PmwColor.py into FourierFreeze (instructions from dynamicloader?)
    * MAKE SURE for Linux that you remove all ^M's from the file. Also, the freeze program doesn't like tabs mixed with spaces, I think. The error message is inscrutable
    * python ../Installer/Makespec.py --onefile --tk --debug --noconsole Fourier.py
    * python ../Installer/Build.py Fourier.spec


AND IT WORKS!!!
adapt Python22 to your version (I personnally have Python 2.3.5 and blt24z-for-tcl84.exe)




From francis.girard at free.fr  Sun Feb  6 16:30:25 2005
From: francis.girard at free.fr (Francis Girard)
Date: Sun, 6 Feb 2005 22:30:25 +0100
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <LYydnagbw4-vVZ7fRVn-pw@comcast.com>
References: <dvOMd.33656$EG1.19314@lakeread04>
	<mailman.1905.1107543558.22381.python-list@python.org>
	<LYydnagbw4-vVZ7fRVn-pw@comcast.com>
Message-ID: <200502062230.25693.francis.girard@free.fr>

This is a prefect use case for the good old "reduce" function:

--BEGIN SNAP

a_lst = [None,0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5]

def straightforward_collapse(lst):
  return reduce(lambda v,e: v[-1]!=e and v+[e] or v, lst[1:], [lst[0]])

def straightforward_collapse_secu(lst):
  return lst and reduce(lambda v,e: v[-1]!=e and v+[e] or v, lst[1:], 
[lst[0]]) or []
  
print straightforward_collapse(a_lst)
print straightforward_collapse_secu([])

--END SNAP

Regards

Francis Girard

Le vendredi 4 F?vrier 2005 20:08, Steven Bethard a ?crit?:
> Mike C. Fletcher wrote:
> > Alan McIntyre wrote:
> > ...
> >
> >> I have a list of items that has contiguous repetitions of values, but
> >> the number and location of the repetitions is not important, so I just
> >> need to strip them out.  For example, if my original list is
> >> [0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5], I want to end up with
> >> [0,1,2,3,2,4,5].
> >
> > ...
> >
> >> Is there an elegant way to do this, or should I just stick with the
> >> code above?
> >>
> >  >>> def changes( dataset ):
> >
> > ...     last = None
> > ...     for value in dataset:
> > ...         if value != last:
> > ...             yield value
> > ...         last = value
> > ...        >>> print list(changes(data ))
> >
> > which is quite readable/elegant IMO.
>
> But fails if the list starts with None:
>
> py> lst = [None,0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5]
> py> def changes(dataset):
> ...     last = None
> ...     for value in dataset:
> ...         if value != last:
> ...             yield value
> ...         last = value
> ...
> py> list(changes(lst))
> [0, 1, 2, 3, 2, 4, 5]
>
> A minor modification that does appear to work:
>
> py> def changes(dataset):
> ...     last = object()
> ...     for value in dataset:
> ...         if value != last:
> ...             yield value
> ...         last = value
> ...
> py> list(changes(lst))
> [None, 0, 1, 2, 3, 2, 4, 5]
>
> STeVe



From dave at pythonapocrypha.com  Wed Feb 16 10:33:54 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Wed, 16 Feb 2005 08:33:54 -0700
Subject: ZODB performance (was Re: low-end persistence strategies?)
In-Reply-To: <f03f4fdf05021607103339fe7@mail.gmail.com>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>	<37h194F50j4pkU1@individual.net>
	<7xfyzwehq7.fsf@ruckus.brouhaha.com>	<37h2keF5a2ijjU1@individual.net>
	<f03f4fdf05021607103339fe7@mail.gmail.com>
Message-ID: <421367E2.8090807@pythonapocrypha.com>

Chris Cioffi wrote:
> I'd like to second this one...ZODB is *extremely* easy to use.  I use
> it in projects with anything from a couple dozen simple objects all
> the way up to a moderately complex system with several hundred
> thousand stored custom objects.  (I would use it for very complex
> systems as well, but I'm not working on any right now...)

Chris (or anyone else), could you comment on ZODB's performance? I've Googled 
around a bit and haven't been able to find anything concrete, so I'm really 
curious to know how ZODB does with a few hundred thousand objects.

Specifically, what level of complexity do your ZODB queries/searches have? Any 
idea on how purely ad hoc searches perform? Obviously it will be affected by the 
nature of the objects, but any insight into ZODB's performance on large data 
sets would be helpful. What's the general ratio of reads to writes in your 
application?

I'm starting on a project in which we'll do completely dynamic (generated on the 
fly) queries into the database (mostly of the form of "from the set of all 
objects, give me all that have property A AND have property B AND property B's 
value is between 10 and 100, ..."). The objects themselves are fairly dynamic as 
well, so building it on top of an RDBMS will require many joins across property 
and value tables, so in the end there might not be any performance advantage in 
an RDBMS (and it would certainly be a lot work to use an object database - a 
huge portion of the work is in the object-relational layer).

Anyway, thanks for any info you can give me,
-Dave


From Serge.Orlov at gmail.com  Fri Feb 11 09:48:59 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: 11 Feb 2005 06:48:59 -0800
Subject: sre is broken in SuSE 9.2
References: <mailman.2299.1108029731.22381.python-list@python.org>
	<1108060527.378911.146240@o13g2000cwo.googlegroups.com>
	<cugc2v$i8u$1@swifty.westend.com>
	<1108064973.719544.228970@z14g2000cwz.googlegroups.com>
	<mailman.2372.1108115088.22381.python-list@python.org>
Message-ID: <1108133339.401022.272310@f14g2000cwb.googlegroups.com>

Denis S. Otkidach wrote:
> On 10 Feb 2005 11:49:33 -0800
> "Serge Orlov" <Serge.Orlov at gmail.com> wrote:
>
> > This thread is about problems only with LANG=C or LANG=POSIX, it's
not
> > about other locales. Other locales are working as expected.
>
> You are not right.  I have LANG=de_DE.UTF-8, and the Python
test_re.py
> doesn't pass.

I meant "only with C or POSIX locales" when I wrote "only with LANG=C
or LANG=POSIX". My bad.

> $LANG doesn't matter if I don't call setlocale.

Sure.

> Fortunately setting any non-C locale solves the problem for all (I
> believe) unicode character:
>
> >>> re.compile(ur'\w+', re.U).findall(u'\xb5\xba\xe4\u0430')
> [u'\xb5\xba\xe4\u0430']

I can't find the strict definition of isalpha, but I believe average
C program shouldn't care about the current locale alphabet, so isalpha
is a union of all supported characters in all alphabets

  Serge.



From peter at engcorp.com  Tue Feb 15 07:33:01 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 15 Feb 2005 07:33:01 -0500
Subject: win32gui bug: where to report it?
In-Reply-To: <cusofn$f0n$1$8302bc10@news.demon.co.uk>
References: <cusofn$f0n$1$8302bc10@news.demon.co.uk>
Message-ID: <HJidnc1JA9rocYzfRVn-sQ@powergate.ca>

George van den Driessche wrote:
> This is a bug for which it is pretty much impossible to work out the
> workaround without being told it, so I'd like to put the workaround in a
> more easily-found place. But where? win32all doesn't seem to have much
> documentation, much less a bug database.

http://sourceforge.net/projects/pywin32/


From douardda at free.fr  Wed Feb  2 18:51:33 2005
From: douardda at free.fr (David Douard)
Date: Thu, 03 Feb 2005 00:51:33 +0100
Subject: Basic file operation questions
References: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
	<mailman.1778.1107380998.22381.python-list@python.org>
	<42016294$0$17053$626a14ce@news.free.fr>
Message-ID: <42016483$0$17053$626a14ce@news.free.fr>

David Douard wrote:

> Marcel van den Dungen wrote:
> 
>> alex wrote:
>>> Hi,
>>> 
>>> I am a beginner with python and here is my first question:
>>> How can I read the contents of a file using a loop or something? I open
>>> the file with file=open(filename, 'r') and what to do then? Can I use
>>> something like
>>> 
>>> for xxx in file:
>>>    ....
>>> 
>>> 
>>> Thanks for help
>>> Alex
>>> 
>> take a look at this:
>> http://www.devshed.com/c/a/Python/File-Management-in-Python/
>> 
>> HTH,
>> -- Marcel
> 
> Or even have a look at the excellent Gnosis book on the subject (and very
> much more further, but...):
> http://gnosis.cx/TPiP/ which is freely available in text format.
> 
> David

Just to tell (it's not clear at all in my message): the author of the book
and creator of Gnosis Software is  David Mertz, and the book is published
by Addison Wesley.
Sorry

David



From olivier.ravard at novagrid.com  Thu Feb  3 03:43:59 2005
From: olivier.ravard at novagrid.com (Olivier Ravard)
Date: Thu, 3 Feb 2005 09:43:59 +0100
Subject: python and visual C++
References: <ctqdtb$lm7$1@news.univ-rennes1.fr>
	<opsllp87k61js0xs@news.telkomsa.net>
Message-ID: <ctsold$i5u$1@news.univ-rennes1.fr>


"Caleb Hattingh" <caleb1 at telkomsa.net> a ?crit dans le message de news:
opsllp87k61js0xs at news.telkomsa.net...
> Olivier
>
> If you consider using the ctypes module, you can write a dll (windows) or
> a shared object (linux) using anything that can make one of those.
>
> For example, I have successfully used FreePascal to make a dynamic library
> on both windows and linux and use that library within python on both
> platforms.

Yes. I do this too. I make my own modules with C++/BOOST and compile them
with gcc under Linux and Windows.

But the problem is about modules thats are developped from others with
distutils...


>
> Heck, even the objectpascal code for the dll was unchanged on both
> platforms.  I simply needed to recompile the objectpascal file on each
> using FreePascal.  Also FreePascal is available on many more platforms
> (though not quite as many as python, I'll wager).

>
> This is the only way I ever intend making native binary additions to my
> own programs.
>
> Regards
> Caleb
>
>
> On Wed, 2 Feb 2005 12:35:08 +0100, Olivier Ravard
> <olivier.ravard at novagrid.com> wrote:
>
> > Hi,
> >
> > When I tryed to compile a python module using distutils under windows,
> > and there is an error message if we do not have Microsoft Visual C++ 6
> > installed.
> > This is because python have been compiled with MSVC6 and distutils wants
> > it
> > in order to compile C++ python modules.
> >
> > One of the reasons why I use python is because this is a free language.
> > But
> > I need
> > a non free compilator to compile my C++ module !!! Choosing MSVC to
> > compile
> > python is a strange choice since there are other free compilators like
> > MinGW.
> >
> > I think that using another compilator should be possible in order to
> > compile
> > python
> > modules since I use BOOST/MinGW to develop my own modules...
> >
> > Diffrerent solutions appears :
> >     - peoples who compile python for windows should use a free
compilator
> >         (MinGW or Microsoft Visual C++ Toolkit 2003 for example)
> >     - modify distutils in order to use another compilator
> >
> > Is there anyone that have experienced this "free" problem and is there a
> > solution
> > that I did not note. I don't want to buy MSVC...
> >
> > Thanks
> >
> > O.R.
> >
> >
> >
>




From tony at tcapp.com  Mon Feb  7 20:02:38 2005
From: tony at tcapp.com (Tony Cappellini)
Date: Mon, 7 Feb 2005 17:02:38 -0800 (PST)
Subject: [Baypiggies] BayPIGgies: January 13, 7:30pm
In-Reply-To: <20050207234850.GA28157@panix.com>
References: <20050207234850.GA28157@panix.com>
Message-ID: <20050207170202.S96328@yamato.yamato.com>


I'll be there, if I can only find where I parked my Tardis :-)




From bac at OCF.Berkeley.EDU  Wed Feb  2 16:25:39 2005
From: bac at OCF.Berkeley.EDU (Brett C.)
Date: Wed, 02 Feb 2005 13:25:39 -0800
Subject: python-dev Summary for 2004-12-16 through 2004-12-31
Message-ID: <42014553.30601@ocf.berkeley.edu>

This is a summary of traffic on the `python-dev mailing list`_ from December 
16, 2004 through December 31, 2004.  It is intended to inform the wider Python 
community of on-going developments on the list.  To comment on anything 
mentioned here, just post to `comp.lang.python`_ (or email 
python-list at python.org which is a gateway to the newsgroup) with a subject line 
mentioning what you are discussing. All python-dev members are interested in 
seeing ideas discussed by the community, so don't hesitate to take a stance on 
something.  And if all of this really interests you then get involved and join 
`python-dev`_!

This is the fifty-fifth summary written by Brett Cannon (I have been doing this
for too long...).

To contact me, please send email to brett at python.org ; I do not have the 
time to keep up on comp.lang.python and thus do not always catch follow-ups 
posted there.

All summaries are archived at http://www.python.org/dev/summary/ .

Please note that this summary is written using reStructuredText_ which can be 
found at http://docutils.sf.net/rst.html .  Any unfamiliar punctuation is 
probably markup for reST_ (otherwise it is probably regular expression syntax 
or a typo =); you can safely ignore it, although I suggest learning reST; it's 
simple and is accepted for `PEP markup`_ and gives some perks for the HTML 
output.  Also, because of the wonders of programs that like to reformat text, I 
cannot guarantee you will be able to run the text version of this summary 
through Docutils_ as-is unless it is from the `original text file`_.

.. _PEP Markup: http://www.python.org/peps/pep-0012.html

The in-development version of the documentation for Python can be found at
http://www.python.org/dev/doc/devel/ and should be used when looking up any
documentation on new code; otherwise use the current documentation as found at
http://docs.python.org/ .  PEPs (Python Enhancement Proposals) are located at 
http://www.python.org/peps/ .  To view files in the Python CVS online, go to 
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/python/ .  Reported bugs and 
suggested patches can be found at the SourceForge_ project page.

The `Python Software Foundation`_ is the non-profit organization that holds the 
intellectual property for Python.  It also tries to forward the development and 
use of Python.  But the PSF_ cannot do this without donations.  You can make a 
donation at http://python.org/psf/donations.html .  Every penny helps so even a 
small donation (you can donate through PayPal or by check) helps.

.. _python-dev: http://www.python.org/dev/
.. _SourceForge: http://sourceforge.net/tracker/?group_id=5470
.. _python-dev mailing list: http://mail.python.org/mailman/listinfo/python-dev
.. _comp.lang.python: http://groups.google.com/groups?q=comp.lang.python
.. _Docutils: http://docutils.sf.net/
.. _reST:
.. _reStructuredText: http://docutils.sf.net/rst.html
.. _PSF:
.. _Python Software Foundation: http://python.org/psf/

.. contents::

.. _last summary: http://www.python.org/dev/summary/2004-12-01_2004-12-15.html
.. _original text file: http://www.python.org/dev/summary/2004-12-16_2004-12-31.ht



=====================
Summary Announcements
=====================
You can still `register <http://www.python.org/pycon/2005/register.html>`__ for 
`PyCon`_.  The `schedule of talks`_ is now online.  Jim Hugunin is lined up to 
be the keynote speaker on the first day with Guido being the keynote on 
Thursday.  Once again PyCon looks like it is going to be great.

On a different note, as I am sure you are all aware I am still about a month 
behind in summaries.  School this quarter for me has just turned out hectic.  I 
think it is lack of motivation thanks to having finished my 14 doctoral 
applications just a little over a week ago (and no, that number is not a typo). 
  I am going to for the first time in my life come up with a very regimented 
study schedule that will hopefully allow me to fit in weekly Python time so as 
to allow me to catch up on summaries.

And this summary is not short because I wanted to finish it.  2.4 was released 
just before the time this summary covers so most stuff was on bug fixes 
discovered after the release.

.. _PyCon: http://www.pycon.org/
.. _schedule of talks: http://www.python.org/pycon/2005/schedule.html


=======
Summary
=======
-------------
PEP movements
-------------
I introduced a `proto-PEP 
<http://mail.python.org/pipermail/python-dev/2005-January/050753.html>`__ to 
the list on how one can go about changing CPython's bytecode.  It will need 
rewriting once the AST branch is merged into HEAD on CVS.  Plus I need to get a 
PEP number assigned to me.  =)

Contributing threads:
   - `proto-pep: How to change Python's bytecode 
<http://mail.python.org/pipermail/python-dev/2004-December/050542.html>`__

------------------------------------
Handling versioning within a package
------------------------------------
The suggestion of extending import syntax to support explicit version 
importation came up.  The idea was to have something along the lines of 
``import foo version 2, 4`` so that one can have packages that contain 
different versions and to provide an easy way to specify which version was desired.

The idea didn't fly, though.  The main objection was that import-as support was 
all you really needed; ``import foo_2_4 as foo``.  And if you had a ton of 
references to a specific package and didn't want to burden yourself with 
explicit imports, one can always have a single place before code starts 
executing doing ``import foo_2_4; sys.modules["foo"] = foo_2_4``.  And that 
itself can even be lower by creating a foo.py file that does the above for you.

You can also look at how wxPython handles it at 
http://wiki.wxpython.org/index.cgi/MultiVersionInstalls .

Contributing threads:
   - `Re: [Pythonmac-SIG] The versioning question... 
<http://mail.python.org/pipermail/python-dev/2004-December/050551.html>`__


===============
Skipped Threads
===============
- Problems compiling Python 2.3.3 on Solaris 10 with gcc 3.4.1
- 2.4 news reaches interesting places
      see `last summary`_ for coverage of this thread
- RE: [Python-checkins] python/dist/src/Modules posixmodule.c, 2.300.8.10, 
2.300.8.11
- mmap feature or bug?
- Re: [Python-checkins]	python/dist/src/Pythonmarshal.c, 1.79, 1.80
- Latex problem when trying to build documentation
- Patches: 1 for the price of 10.
- Python for Series 60 released
- Website documentation - link to descriptor information
- Build extensions for windows python 2.4 what are the compiler rules?
- Re: [Python-checkins] python/dist/src setup.py, 1.208, 1.209
- Zipfile needs?
     fake 32-bit unsigned int overflow with ``x = x & 0xFFFFFFFFL`` and signed 
ints with the additional ``if x & 0x80000000L: x -= 0x100000000L`` .
- Re: [Python-checkins] python/dist/src/Mac/OSX	fixapplepython23.py, 1.1, 1.2


From peter at engcorp.com  Thu Feb  3 09:44:36 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 03 Feb 2005 09:44:36 -0500
Subject: Is there a market for python developers?
In-Reply-To: <1107440354.317628.221090@g14g2000cwa.googlegroups.com>
References: <1107440354.317628.221090@g14g2000cwa.googlegroups.com>
Message-ID: <nqGdnWsrpaFJpZ_fRVn-qA@powergate.ca>

Mabon Dane wrote:
> I am new to python and took my first attempts at working with this
> language today.  Is there a market for people who work with Python?

Yes.


From m at m.com  Tue Feb  8 13:17:05 2005
From: m at m.com (m)
Date: Tue, 08 Feb 2005 12:17:05 -0600
Subject: Python versus Perl ?
In-Reply-To: <hkhc01dnpmmhn980quijqil40653qipdki@4ax.com>
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
	<hkhc01dnpmmhn980quijqil40653qipdki@4ax.com>
Message-ID: <cuavn1$bag$1@nntp.msstate.edu>

Courageous wrote:
> 
>>If Python is better than Perl, I'm curious how really significant
>>those advantages are ?

speedwise, i think perl is faster than python and python performed the 
slowest as shown in http://www.flat222.org/mac/bench/


From fperez.net at gmail.com  Mon Feb 14 18:58:00 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Mon, 14 Feb 2005 16:58:00 -0700
Subject: graphing
References: <c78fcbdc05021309186684d3a6@mail.gmail.com>
Message-ID: <curdpo$khj$1@sea.gmane.org>

Jan Rienyer Gadil wrote:

> i'm currently using python 2.3(enthought edition) on win 2000/xp.
> i'm using boa constructor on the GUI part and matplotlib 0.71 on
> plotting the graph.

You should post this on the matplotlib list directly, where your chances of a
reply are much better.  I use matplotlib, but not in the context of GUI
embedding, so I can't help.

best,

f



From davidschein at alumni.tufts.edu  Wed Feb 16 15:49:11 2005
From: davidschein at alumni.tufts.edu (David S.)
Date: Wed, 16 Feb 2005 20:49:11 +0000 (UTC)
Subject: huge help for interactive python
Message-ID: <loom.20050216T213315-348@post.gmane.org>

If you are using ipython on Windows then you will
have made sure you have Gary Bishop's readline 
library as instructed in the ipython install 
directions found at:
http://ipython.scipy.org/

Even if you use the standard commandline tool, 
installing readline makes the basic command line a 
lot easier to use.  (For some reason, I much
prefer it to IDLE or any of the other GUI-wrapped
interpreters.)

I could not find a list of the keyboard commands 
that readline supports, so I generated:

http://fsinnovations.net/share/keymap.pdf

NOTES:
You can checkout the script that generates this at:
http://fsinnovations.net/share/readlinekeymap.py
This uses Ken Seehof's Python Cookbook recipe found at:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/81982
I am sure it can be improved, but it was easy.  By the 
way, it generates LaTeK.

To install readline, get it at:
http://sourceforge.net/projects/uncpythontools.
You will also need the ctypes library by 
Thomas Heller, found at:
http://starship.python.net/crew/theller/ctypes





From jjl at pobox.com  Sat Feb  5 18:10:08 2005
From: jjl at pobox.com (John J. Lee)
Date: 05 Feb 2005 23:10:08 +0000
Subject: How do I enter/receive webpage information?
References: <1107560030.834943.174250@f14g2000cwb.googlegroups.com>
	<slrnd0a171.rr5.jgrahn-nntq@frailea.sa.invalid>
Message-ID: <87k6pmwqlr.fsf@pobox.com>

Jorgen Grahn <jgrahn-nntq at algonet.se> writes:
[...]
> - subclassed sgmllib.SGMLParser once for each kind of page I expected to
>   receive. This class knew how to pull the information from a HTML document,
>   provided it looked as I expected it to.  Very tedious work. It can be easier
>   and safer to just use module re in some cases.
[...]

BeautifulSoup is often recommended (never tried it myself).

Remember HTMLtidy and its offshoots (eg. tidylib, mxTidy) are
available for cleaning horrid HTML while-u-scrape, too.

Alternatively, some people swear by automating Internet Explorer;
other people would rather be hit on the head with a ball-peen hammer
(not only the MS-haters)...


John


From caleb1 at telkomsa.net  Wed Feb  2 23:47:41 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Wed, 02 Feb 2005 23:47:41 -0500
Subject: Basic file operation questions
References: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
Message-ID: <opsllt9r191js0xs@news.telkomsa.net>

Hi Alex

Assuming you have a file called "data.txt":

***
f = open('data.txt','r')
lines = f.readlines()
f.close()
for line in lines:
     print line
***
Will print each line of the file.

You can make a huge investment by setting 2 or 3 hours aside to go through  
the Python tutorial, which gets installed as part of the documentation.   
That tutorial can get you much of the knowledge you will ever need with  
Python.

thx
Caleb


On 2 Feb 2005 13:27:49 -0800, alex <alexander.dietz at mpi-hd.mpg.de> wrote:

> Hi,
>
> I am a beginner with python and here is my first question:
> How can I read the contents of a file using a loop or something? I open
> the file with file=open(filename, 'r') and what to do then? Can I use
> something like
>
> for xxx in file:
>    ....
>
>
> Thanks for help
> Alex
>



From luc at pasdespams.fr  Sat Feb 12 09:18:07 2005
From: luc at pasdespams.fr (Luc)
Date: Sat, 12 Feb 2005 15:18:07 +0100
Subject: Web interface GUI??
References: <420deeea$0$19443$8fcfb975@news.wanadoo.fr>
	<420df186$0$28979$e4fe514c@news.xs4all.nl>
Message-ID: <420e0fff$0$19398$8fcfb975@news.wanadoo.fr>

Irmen de Jong a ?crit:

> Luc wrote:
> 
>> So I am looking for another solution with a web interface that should
>> work with linux and windows XP.
>> I had a look to zope but was afraid with the complexity and debug
>> difficulties.
>> Are there some other solutions?
> 
> Yes. A lot: http://www.python.org/moin/WebProgramming
> I know someone who successfully created a web application
> that runs from CD-ROM, using Snakelets. So you may want
> to have a look at that one first, because this is quite
> similar to what you want to do, right?
> Then again I'm biased ofcourse.
> Just have a quick look at the available libraries and
> decide which one fits your needs most.
> 
> --Irmen
Thanks. It seems to be a good starting point


From python-url at phaseit.net  Wed Feb 23 23:06:37 2005
From: python-url at phaseit.net (Cameron Laird)
Date: Thu, 24 Feb 2005 04:06:37 +0000
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Feb 24)
Message-ID: <mailman.3003.1109259540.22381.python-announce-list@python.org>

QOTW:  "Who's 'Guido'?" -- Ilias Lazaridis

"I know this document.  It has no relevance to me." -- Ilias
Lazaridis, on <URL: http://www.catb.org/~esr/faqs/smart-questions.html >

"Nobody asked them to do this (AFAIK), it's more that nobody could
_stop_ them from doing it." -- timbot, on the work of Jason Tishler
and Andrew MacIntyre with Cygwin and OS/2 EMX, respectively


    Hot off the virtual press:  Py2.4 Quick Reference:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/5be203da13eafdd2/

    For a decade now, confident people have declaimed in 
    managers' meetings and conferences that {local,Web}
    applications are {dead,utterly triumphant}, in all
    combinations (and sometimes at the same venues) (and
    sometimes by the same people!) (although not by the
    same people at the same time).  Real Programmers know
    they need judgment and expertise on both sides.  The
    principal implications for Python:  client-side Web
    scripting is one of the few domains where Python is
    *not* nearly ideal (although not for technical reasons);
    but the best "Weblications" still can result from co-
    operation between Python and other languages:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/b0085890efa29780/

    Kartic and Tony Meyer provide nice two-minute tutorials
    on imaplib, and, more generally, network programming:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/c8f87f28f00a9c93/

    Tkinter has modal dialogues:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/8fce072f149f13c0/

    Ron Stephens entertainingly advertises pyGoogle:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/e28557ad49b4619a/

    Peaceful coexistence:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/3adfa3b1148aaa8e/
	http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/3775e1b575d8fb67/


========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Brett Cannon continues the marvelous tradition established by 
    Andrew Kuchling and Michael Hudson of intelligently summarizing
    action on the python-dev mailing list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    The Python Business Forum "further[s] the interests of companies
    that base their business on ... Python."
	http://www.python-in-business.org

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topics/pythonurl/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.




From steven.bethard at gmail.com  Wed Feb 16 14:49:53 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 16 Feb 2005 12:49:53 -0700
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <37hippF4gcimiU1@individual.net>
References: <37hippF4gcimiU1@individual.net>
Message-ID: <uvydnfy2d-J9Po7fRVn-uQ@comcast.com>

Leo Breebaart wrote:
> I'm not complaining as such -- sep.join(str(i) for i in seq) is
> not *that* ugly, but what annoys me is that I don't understand
> *why* this was never changed.

py> chars = [u'?', u'?']
py> ', '.join(chars)
u'\xe4, \xe5'
py> ', '.join(str(c) for c in chars)
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
   File "<interactive input>", line 1, in <generator expression>
UnicodeEncodeError: 'ascii' codec can't encode character u'\xe4' in 
position 0: ordinal not in range(128)
py> u', '.join(chars)
u'\xe4, \xe5'
py> u', '.join(unicode(c) for c in chars)
u'\xe4, \xe5'

Currently, str.join will return a unicode object if any of the items to 
be joined are unicode.  That means that str.join accepts unicode objects 
as well as str objects.  So you couldn't just call str on all the objects...

Maybe you could call str or unicode on each object as appropriate 
though...  If str.join already determines that it must return a unicode 
object, it could call unicode on all the items instead of str...  I 
don't know the code well enough though to know if this is feasible...

STeVe


From claudio.grondi at freenet.de  Fri Feb  4 09:51:33 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Fri, 4 Feb 2005 14:51:33 -0000
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot>
	<1107487113.732375.110850@c13g2000cwb.googlegroups.com>
	<opslnmywarej1m1c@ashot>
	<mailman.1865.1107491434.22381.python-list@python.org>
	<opsln54fpwej1m1c@ashot>
Message-ID: <36hculF51ho2sU1@individual.net>

Hi,

I have watched this thread hoping to get an
hint on my problem, but it seems I didn't.

My problem is, that the background of part of
the error messages is always black
(e.g. after typing In [1]: sdfsdf)
and my monitor failes to show the red, green
texts on black background clearly enough
to see it (I can read it after selection, which
inverts the colors).
I have tried to play with PyColorize.py,
LightBGColors = ColorScheme(
    'LightBG',{
    token.NUMBER     : Colors.Cyan,
    token.OP         : Colors.Blue,
    token.STRING     : Colors.Blue,
    tokenize.COMMENT : Colors.Red,
    token.NAME       : Colors.White, # Colors.Black,
    token.ERRORTOKEN : Colors.Red,

    _KEYWORD         : Colors.Green,
    _TEXT            : Colors.Blue,

    'normal'         : Colors.White # Colors.Normal  # color off (usu.
Colors.Normal)
    }
but without success.
How can I get rid of the black background
"---------------------------------------------------------------------------
"
"exceptions.NameError"                                 Traceback (most
recent call last)
in with quotation marks marked areas?
Where is the color of the background of this
areas defined?
The color scheme seems to handle only the
text colors, not the background.

Claudio

"Ashot" <ashot at removemolsoftthis.com> schrieb im Newsbeitrag
news:opsln54fpwej1m1c at ashot...
> yea, I've done that. It must be something subtle, as the colors and tab
> completion works.
> On Thu, 03 Feb 2005 20:31:37 -0800, DogWalker <forestiero at qwest.net>
wrote:
>
> > "Ashot" <ashot at removemolsoftthis.com> said:
> >
> >> On 3 Feb 2005 19:18:33 -0800, James <fphsml at gmail.com> wrote:
> >>
> >>>
> >>> Ashot wrote:
> >>>> I am using IPython in windows and the LightBG setting doesn't
> >>> correctly
> >>>> because the background of the text is black even if the console
> >>> background
> >>>> is white.  Anyone know whats going on?  Thanks.
> >>>>
> >>>> --
> >>>> ==============================
> >>>> Ashot Petrosian
> >>>> University of Texas at Austin, Computer Sciences
> >>>> (views expressed are solely my own)
> >>>> ==============================
> >>>
> >>> Did you try installing readline for windows?
> >>> http://newcenturycomputers.net/projects/readline.html
> >>>
> >>
> >> yea I've installed that and ctypes.  The color and tab completion work,
> >> its just that colored get displayed with black background, it almost
> >> works
> >> so its very frustrating..
> >>
> >
> > Did you try the following (from the manual)?:
> >
> > Input/Output prompts and exception tracebacks
> >
> >
> > You can test whether the colored prompts and tracebacks work on your
> > system interactively by typing '%colors Linux' at the prompt (use
> > '%colors LightBG' if your terminal has a light background). If the input
> > prompt shows garbage like:
> > [0;32mIn [[1;32m1[0;32m]: [0;00m
> >  instead of (in color) something like:
> >  In [1]:
> >   this means that your terminal doesn't properly handle color escape
> > sequences. You can go to a 'no color' mode by typing '%colors NoColor'.
> >
> >
> >   You can try using a different terminal emulator program. To
> > permanently set your color preferences, edit the file
> > $HOME/.ipython/ipythonrc and set the colors option to the desired value.
>
>
>
> --
> ==============================
> Ashot Petrosian
> University of Texas at Austin, Computer Sciences
> (views expressed are solely my own)
> ==============================




From jeff at ccvcorp.com  Wed Feb  9 21:19:53 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Wed, 09 Feb 2005 18:19:53 -0800
Subject: Is Python as capable as Perl for sysadmin work?
In-Reply-To: <cf8l01dl6911psj00hm5jnmo9jejul2kme@4ax.com>
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
	<cu9k87$d80$1@panix2.panix.com>
	<110hqc5gu943d89@corp.supernews.com>
	<cf8l01dl6911psj00hm5jnmo9jejul2kme@4ax.com>
Message-ID: <110lh3oteq71ge3@corp.supernews.com>

Courageous wrote:

> 
> *checks self to see if self is wearing rose colored glasses*
> 

assert(self.glasses.color != 'rose')

;)

Jeff Shannon
Technician/Programmer
Credit International



From glc at well.com  Sun Feb 20 09:58:59 2005
From: glc at well.com (Greg Chapman)
Date: Sun, 20 Feb 2005 14:58:59 GMT
Subject: segfault when calling Python from C thread
References: <mailman.2845.1108863127.22381.python-list@python.org>
Message-ID: <TA1Sd.1558$873.1345@newsread3.news.pas.earthlink.net>

Travis Berg wrote:

> 
> I'm running into a problem when trying to perform a callback to a
> Python function from a C extension.  Specifically, the callback is
> being made by a pthread that seems to cause the problem.  If I call
> the callback from the parent process, it works fine.  The PyObject is
> static, and holds the same value in both Parent and thread, so I'm at
> a loss as to what would be different in the pthread from the parent
> that would cause a segfault on the callback.  The machine specifics
> are an x86 intel processor with RedHat linux.
> 
> 
> /* calling callback */
> void callback(char * str) {
>     PyObject *arglist;
>     PyObject *result;
>     if(str == NULL)
>         return;
> 
>     if(my_callback == NULL) {
>         printf("no callback function provided, returning...\n");
>         return;
>     }
> 
>     /* Time to call the callback */
>     arglist = Py_BuildValue("(s)", str);
>     result = PyEval_CallObject(my_callback, arglist);
>     Py_DECREF(arglist);
>     if(result == NULL)
>         return;
>     Py_DECREF(result);
> }

Your callback function needs to hold the Python GIL (and have a vaild
threadstate) before it calls any Python C-API functions.  Change the
last part of it to:

    PyGILState_STATE state;

    /* ... */

    /* Time to call the callback */

    state = PyGILState_Ensure();

    arglist = Py_BuildValue("(s)", str);
    result = PyEval_CallObject(my_callback, arglist);
    Py_DECREF(arglist);
    if(result == NULL)
        return;
    Py_DECREF(result);

    PyGILState_Release(state);
}

Also, somewhere in your main thread you should call PyEval_InitThreads
before any of the callback threads execute.  (This call is made
automatically if you are creating new threads using Python's thread
module, but if the new threads are created by some C code, you need to
call it yourself.)

---
Greg Chapman


From wweston at att.net  Mon Feb 28 11:37:10 2005
From: wweston at att.net (wes weston)
Date: Mon, 28 Feb 2005 16:37:10 GMT
Subject: String Replace Problem...
In-Reply-To: <mailman.3138.1109605552.22381.python-list@python.org>
References: <mailman.3138.1109605552.22381.python-list@python.org>
Message-ID: <WMHUd.86946$Th1.11160@bgtnsc04-news.ops.worldnet.att.net>

andrea.gavana at agip.it wrote:
> Hello NG,
> 
>       probably this is a basic question, but I'm going crazy... I am unable
> to find an answer. Suppose that I have a file (that I called "Errors.txt")
> which contains these lines:
> 
> MULTIPLY
>   'PERMX'  @PERMX1  1 34  1  20  1 6     /
>   'PERMX'  @PERMX2  1 34  21 41  1 6     /
>   'PERMX'  @PERMX3  1 34  1  20  7 14    /
>   'PERMX'  @PERMX4  1 34  21 41  7 14    /
>   'PERMX'  @PERMX5  1 34  1  20 15 26    /
>   'PERMX'  @PERMX6  1 34  21 41 15 26    /
>   'PERMX'  @PERMX7  1 34  1  20 27 28    /
>   'PERMX'  @PERMX8  1 34  21 41 27 28    /
>   'PERMX'  @PERMX9  1 34  1  20 29 34    /
>   'PERMX'  @PERMX10  1 34  21 41 29 34    /
>   'PERMX'  @PERMX11  1 34  1  20 35 42    /
>   'PERMX'  @PERMX12  1 34  21 41 35 42    /
>   'PERMX'  @PERMX13  1 34  1  20 43 53    /
>   'PERMX'  @PERMX14  1 34  21 41 43 53    /
>   'PERMX'  @PERMX15  1 34  1  20 54 61    /
>   'PERMX'  @PERMX16  1 34  21 41 54 61    /
> /
> 
> I would like to replace all the occurrencies of the "keywords" (beginning
> with the @ (AT) symbol) with some floating point value. As an example, this
> is what I do:
> 
> #  --- CODE BEGIN
> 
> import re
> import string
> 
> # Set Some Dummy Parameter Values
> parametervalues = range(1, 17)
> 
> # Open And Read The File With Keywords
> fid = open("Errors.txt","rt")
> onread = fid.read()
> fid.close()
> 
> # Find All Keywords Starting with @ (AT)
> regex = re.compile("[\@]\w+", re.IGNORECASE)
> keywords = regex.findall(onread)
> 
> counter = 0
> 
> # Try To Replace The With Floats
> for keys in keywords:
>     pars = parametervalues[counter]
>     onread = string.replace(onread, keys, str(float(pars)))
>     counter = counter + 1
> 
> # Write A New File With Replaced Values
> fid = open("Errors_2.txt","wt")
> fid.write(onread)
> fid.close()
> 
> #  --- CODE END
> 
> 
> Now, I you try to run this little script, you will see that for keywords
> starting from "@PERMX10", the replaced values are WRONG. I don't know why,
> Python replace only the "@PERMX1" leaving out the last char of the keyword
> (that are 0, 1, 2, 3, 4, 5, 6 ). These values are left in the file and I
> don't get the expected result.
> 
> Does anyone have an explanation? What am I doing wrong?
> 
> Thanks to you all for your help.
> 
> Andrea.
> 
> ------------------------------------------------------------------------------------------------------------------------------------------
>  Message for the recipient only, if received in error, please notify the
> sender and read http://www.eni.it/disclaimer/
> 
> 

andrea,
    If you put in "keywords.reverse()" after getting
keywords, things may work better. Though not a good
fix, it illustrates part of the problem. If you replace
"@PERMX1" you also replace part of "@PERMX10".
    Wouldn't it be better to read the file as lines
instead of strings?
wes



From wenshengwang at gmail.com  Thu Feb 17 11:51:55 2005
From: wenshengwang at gmail.com (Wensheng)
Date: 17 Feb 2005 08:51:55 -0800
Subject: Loading functions from a file during run-time
In-Reply-To: <1108580150.436813.227870@o13g2000cwo.googlegroups.com>
References: <1108091598.055004.24890@g14g2000cwa.googlegroups.com>
	<1108576067.140194.115620@c13g2000cwb.googlegroups.com>
	<1108580150.436813.227870@o13g2000cwo.googlegroups.com>
Message-ID: <1108659115.244291.110860@l41g2000cwc.googlegroups.com>

f=open("bar.txt")
import imp
fs=imp.new_module("fs")
exec f in fs.__dict__
.... rests are the same

althought why use anything other than .py, when you import .py, it get
compiled into .pyc and it load faster next time



From debianfreak at freenet.de  Tue Feb 22 17:21:15 2005
From: debianfreak at freenet.de (Jochen Kaechelin)
Date: Tue, 22 Feb 2005 23:21:15 +0100
Subject: newbie help for mod_python
Message-ID: <200502222321.15273.debianfreak@freenet.de>

I run debian sid and apache2 with libapache2-mod-python2.3
and I added these lines

<Directory /var/www>
   AddHandler mod_python .py
   PythonDebug On
</Directory>

in a virtualhost container.

and I have the following python-file:

from mod_python import apache
def requesthandler(req):
 req.content_type = "text/plain"
 req.write("HELLO")
 return apache.OK

But the file is not executed - instead a download-dialog
is opened.

Any suggestions?

Thanx.


-- 
Jochen Kaechelin


From mefjr75 at hotmail.com  Sun Feb  6 09:40:00 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 6 Feb 2005 06:40:00 -0800
Subject: pygame.mixer.music not playing
In-Reply-To: <36mb0iF54udklU1@individual.net>
References: <36mb0iF54udklU1@individual.net>
Message-ID: <1107700800.258876.298010@z14g2000cwz.googlegroups.com>

Marian Aldenh?vel wrote:
> Hi,
>
> I am trying to make pygame play music on windows. This simple
program:
>
> 	import pygame,time
> 	pygame.init()
> 	print "Mixer settings", pygame.mixer.get_init()
> 	print "Mixer channels", pygame.mixer.get_num_channels()
> 	pygame.mixer.music.set_volume(1.0)
> 	pygame.mixer.music.load('file1.mp3)
> 	print "Play"
> 	pygame.mixer.music.play()
>
> 	while pygame.mixer.music.get_busy():
> 		print "Playing", pygame.mixer.music.get_pos()
> 		time.sleep(1)
>
> 	print "Done"
>
> seems to work. It runs the loop and prints values that look like ms
into the
> file. After a reasonable time corresponding to the length of
"file1.mp3" the
> loop is exited and the program ends.
>
> The same thing happens for .mp3 files, .ogg files and .wav files.
>
> Fine. The only problem is that there is no sound :-).
>
> What am I doing wrong? pyGame example games do play sound, but I have
not
> found an example that uses music.
>
> My ultimate goal is to build a MP3 jukebox that runs on Windows and
Linux. I
> have chosen pyGame as I am making a graphical Frontend using OpenGL.
I have
> also tried to look at pymad (which I could not get to work on
Windows, no
> C-Compiler on this machine and I could not find binaries) and audiere
(no
> skipping, at least in the python binding. A feature I would like to
have.)
>
> Ciao, MM
> --
> Marian Aldenh?vel, Rosenhain 23, 53123 Bonn. +49 228 624013.
> http://www.marian-aldenhoevel.de
> "Wir brauchen keine Opposition, wir sind bereits Demokraten."

Hello Marian,
First thing out i must tell you that pygame is ok for games but the
music quality is sometimes sketchy, you must set the bit rate to get
good sound quality and there are many other pitfalls. Search the net.
You are not the first to try and build a jukebox out of pygame ;)

Py> import pygame
Py> pygame.mixer.init()
Py> pygame.mixer.music.load('c:/everyday.mp3')
Py> pygame.mixer.play()
Py> pygame.mixer.music.fadeout(4000)

You have a typo in the code you posted that may be your problem.
M.E.Farmer



From ole.anders.walseth at telemed.no  Mon Feb 14 09:30:02 2005
From: ole.anders.walseth at telemed.no (oleaw)
Date: Mon, 14 Feb 2005 09:30:02 -0500
Subject: Problem using win32com
References: <ac6548cbb0a5423510758fc94cd067d6@localhost.talkaboutprogramming.com>
Message-ID: <ce4231b61b18acfb3bd280f3c9220385@localhost.talkaboutprogramming.com>

I am having a similar problem with a com+ API created in delphi. is this a
win32com problem?






From petr at tpc.cz  Fri Feb  4 03:47:40 2005
From: petr at tpc.cz (McBooCzech)
Date: 4 Feb 2005 00:47:40 -0800
Subject: how to generate SQL SELECT pivot table string
In-Reply-To: <1107482610.883260.21660@o13g2000cwo.googlegroups.com>
References: <1107475373.064794.155030@l41g2000cwc.googlegroups.com>
	<1107482610.883260.21660@o13g2000cwo.googlegroups.com>
Message-ID: <1107506860.230103.4380@g14g2000cwa.googlegroups.com>

Tahnks a lot. Michalels sequence works flawlessly. And it is really
elegant :)

John Machin wrote:
>A few quick silly questions:
>Have you read the Python tutorial?
>Do you read this newsgroup (other than answers to your own questions)?
>Could you have done this yourself in a language other than Python?
Of course I have read (or still reading) Python tuorial and newsgroup
(No kidding:). And I am able to done this in VBA for example. But I am
not able to write such a elegant construction. Tanks a lot.



From skip at pobox.com  Thu Feb  3 23:12:14 2005
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 3 Feb 2005 22:12:14 -0600
Subject: OT: why are LAMP sites slow?
In-Reply-To: <7xis59qgaz.fsf@ruckus.brouhaha.com>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<mailman.1857.1107479377.22381.python-list@python.org>
	<7xis59qgaz.fsf@ruckus.brouhaha.com>
Message-ID: <16898.63006.78208.922627@montanaro.dyndns.org>


    Paul> I'm talking about the very familiar experience of clicking a link
    Paul> and then waiting, waiting, waiting for the page to load.  You
    Paul> rarely see that happen with Ebay or Google.  It happens all the
    Paul> time with Wikipedia.

It's more than a bit unfair to compare Wikipedia with Ebay or Google.  Even
though Wikipedia may be running on high-performance hardware, it's unlikely
that they have anything like the underlying network structure (replication,
connection speed, etc), total number of cpus or monetary resources to throw
at the problem that both Ebay and Google have.  I suspect money trumps LAMP
every time.

Just as a quick comparison, I executed

    host www.wikipedia.org
    host www.google.com

on two different machines, my laptop here on Comcast's network in Chicago,
and at Mojam's co-lo server in Colorado Springs.  I got the same results for
Wikipedia:

    www.wikipedia.org has address 207.142.131.203
    www.wikipedia.org has address 207.142.131.204
    www.wikipedia.org has address 207.142.131.205
    www.wikipedia.org has address 207.142.131.202

but different results for Google.  Laptop/Chicago:

    www.google.com is a nickname for www.google.akadns.net
    www.google.akadns.net has address 64.233.161.104
    www.google.akadns.net has address 64.233.161.99
    www.google.akadns.net has address 64.233.161.147

Co-Lo server/Colorado Springs:

    www.google.com is an alias for www.google.akadns.net.
    www.google.akadns.net has address 64.233.187.99
    www.google.akadns.net has address 64.233.187.104

We also know Google has thousands of CPUs (I heard 5,000 at one point and
that was a couple years ago).  I doubt Wikipedia has more than a handful of
CPUs and they are probably all located in the same facility.  Google's
front-end web servers are clearly distributed around the Internet.  I
wouldn't be surprised if their back-end servers were widely distributed as
well.

Here's a link to an IEEE Micro article about Google's cluster architecture:

    http://www.search3w.com/Siteresources/data/MediaArchive/files/Google%2015000%20servers%20secrest.pdf

It was published in 2003 and gives a figure of 15,000 commodity PCs.

Here's one quote from the beginning of the article:

    To provide sufficient capacity to handle query traffic, our service
    consists of multiple clusters distributed worldwide. Each cluster has
    around a few thousand machines, and the geographically distributed setup
    protects us against catastrophic data center failures (like those
    arising from earthquakes and large-scale power failures).

Skip


From mfranklin1 at gatwick.westerngeco.slb.com  Thu Feb  3 06:20:22 2005
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Thu, 03 Feb 2005 11:20:22 +0000
Subject: convert ftp.retrbinary to file object? - Python language lacks
 expression?
In-Reply-To: <ctt0l1$o66$1@sea.gmane.org>
References: <19804fd8.0502030208.10ace31e@posting.google.com>
	<ctt0l1$o66$1@sea.gmane.org>
Message-ID: <ctt1cj$q2n$1@sea.gmane.org>

Martin Franklin wrote:
> Robert wrote:
> 
>> I just tried to convert a (hugh size) ftp.retrbinary run into a
>> pseudo-file object with .read(bytes) method in order to not consume
>> 500MB on a copy operation.

[snip]

> 
> 
> Hmmmm this is nearly there I think...:

whoops... spoke too soon..

> 
> import ftplib
> 
> class TransferAbort(Exception): pass
> 
> class FTPFile:
>     def __init__(self, server, filename):
>         self.server = server
>         self.filename = filename
>         self.offset = 0
> 
>     def callback(self, data):
>         self.offset = self.offset + len(data)
>         self.data = data
>         ## now quit the RETR command?
>         raise TransferAbort("stop right now")
> 
>     def read(self, amount):
>         self.ftp = ftplib.FTP(self.server)
>         self.ftp.login()


I needed to insert a time.sleep(0.1) here as the connections were
falling over themselves - I guess testing with a blocksize of 24
is a little silly.


>         try:
>             self.ftp.retrbinary("RETR %s" %self.filename, self.callback,
>                 blocksize=amount,
>                 rest=self.offset)
>         except TransferAbort:
>             return self.data
> 
> 
> f = FTPFile("HOSTNAME", "FILENAME")
> 
> print f.read(24)
> print f.read(24)
> 

## new test...

f = FTPFile("HOSTNAME", "FILENAME")

while 1:
     data = f.read(24)
     if not data:
         break
     print data,


> 
> I open the ftp connection inside the read method as it caused an error 
> (on the second call to read) when I opened it in  __init__ ???
> 
> HTH
> Martin
> 
> 












From tanghaibao at gmail.com  Thu Feb 10 23:32:22 2005
From: tanghaibao at gmail.com (Haibao Tang)
Date: 10 Feb 2005 20:32:22 -0800
Subject: Performance Issues of MySQL with Python
In-Reply-To: <1107954472.246556.258030@g14g2000cwa.googlegroups.com>
References: <1107954472.246556.258030@g14g2000cwa.googlegroups.com>
Message-ID: <1108096342.787772.269670@f14g2000cwb.googlegroups.com>

There are no performance overhead except when you are dragging a huge
chunk of information out of the database, in that case, python is
converting the data to its tuple data type which adds one more
processing.

I found this when I didn't have the priviledge to do "mysql> SELECT *
FROM TBL INTO OUTFILE;", I used python MySQLdb first, which I later
found sufficiently slower enough than using >>>system("echo 'USE db;
SELECT * FROM TBL;' |mysql >outfile")

But this is the minor case.



From aclarke11 at yahoo.co.uk  Sat Feb  5 14:48:43 2005
From: aclarke11 at yahoo.co.uk (Tony)
Date: 5 Feb 2005 11:48:43 -0800
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <Ge4Nd.103631$Jk5.74253@lakeread01>
References: <dvOMd.33656$EG1.19314@lakeread04>
	<1107606972.861993.250330@f14g2000cwb.googlegroups.com>
	<Ge4Nd.103631$Jk5.74253@lakeread01>
Message-ID: <1107632923.585796.254130@z14g2000cwz.googlegroups.com>


Alan McIntyre wrote:
> Tony,
>
> Actually I only want to remove a certain kind of duplication; <snip>

How about this one liner?
def condense(m):
                    print [m[0]]+[m[k] for k in range(1,len(m)) if
m[k]!=m[k-1]]
b=[1,1,1,2,2,2,1,1,1]
condense(b)
Tony Clarke



From kent37 at tds.net  Wed Feb 16 12:08:47 2005
From: kent37 at tds.net (Kent Johnson)
Date: Wed, 16 Feb 2005 12:08:47 -0500
Subject: more os.walk() issues... probably user error
In-Reply-To: <cuvsmi$4bb$1@solaris.cc.vt.edu>
References: <cuvr5b$2ei$1@solaris.cc.vt.edu> <cuvsmi$4bb$1@solaris.cc.vt.edu>
Message-ID: <42137b28$1_3@newspeer2.tds.net>

rbt wrote:
> rbt wrote:
> 
>> This function is intended to remove unwanted files and dirs from 
>> os.walk(). It will return correctly *IF* I leave the 'for fs in 
>> fs_objects' statement out (basically leave out the entire purpose of 
>> the function).
>>
>> It's odd, when the program goes into that statment... even when only a 
>> 'pass', and nothing else is present, nothing is returned. Why is that? 
>> I'm testing Python 2.4 on Linux x86 and WinXP. Results are the same on 
>> either platform.
>>
>>     def build_clean_list(self, path):
>>
>>         file_skip_list = ['search_results.txt']
>>         dir_skip_list = ['dev', 'proc', 'Temporary Internet Files']
>>
>>         fs_objects = os.walk(path, topdown=True)

fs_objects is a generator, not a list. This loop is exhausting fs_objects, so when you return 
fs_objects is at the end of iteration, there is nothing left.

>> ##      for fs in fs_objects:
>> ##
>> ##            for f in fs[2]:
>> ##                if f in file_skip_list:
>> ##                    print f
>> ##                    fs[2].remove(f)
>> ##
>> ##            for d in fs[1]:
>> ##                if d in dir_skip_list:
>> ##                    print d
>> ##                    fs[1].remove(d)

Add this here:
                  yield fs

and take out the return. This turns build_clean_list() into a generator function and you will be 
able to iterate the result.

Kent

>>
>>         return fs_objects
>>
>>
> 
> Just to clarify, it's wrong of me to say that 'nothing is returned'... 
> in either case, this is what is returned:
> 
> Here's what was returned and its type:
> ----------------------------------------
> <generator object at 0x407dbe4c>
> <type 'generator'>
> ----------------------------------------
> 
> But, I can't iterate over the returned object when I descend into the 
> for statement I mentioned above.
> 


From bifacial at gmail.com  Sat Feb 19 14:01:15 2005
From: bifacial at gmail.com (bifacial at gmail.com)
Date: 19 Feb 2005 11:01:15 -0800
Subject: pyWrath project
Message-ID: <1108836599.994746.130750@l41g2000cwc.googlegroups.com>

Privet!

I am bifacial, admin of the pywrath project
(http://sourcefoge.net/projects/pywrath). PyWrath is PBeM game/emgine
for python, based on principles of futuristic warfare.

PyWrath is still in very early fase of development, and we are in
constant need of developers. We are accepting each and every
man/woman/elf/alien/cyborg/whatelse who is capable to do some basic
(sometimes advanced) Python tasks.

Interested? Contact me at bifacial at users.sourceforge.net or
bifacial at gmail.com.

Regards,
BiFacial

P. S. Sorry for crappy English. I am Russian, after all :)



From postmaster at castleamber.com  Mon Feb  7 15:18:06 2005
From: postmaster at castleamber.com (John Bokma)
Date: 7 Feb 2005 20:18:06 GMT
Subject: [perl-python] text pattern matching, and expressiveness
References: <1107802850.999843.260520@c13g2000cwb.googlegroups.com>
Message-ID: <Xns95F6917BFEEF4castleamber@130.133.1.4>

Xah Lee wrote:

> Perl is a language of syntactical variegations. Python on the other
> hand, does not even allow changes in code's indentation, but its
> efficiency and power in expression, with respect to semantics (i.e.
> algorithms), showcases Perl's poverty in specification.

Clarify :-D.

-- 
John                   Small Perl scripts: http://johnbokma.com/perl/
               Perl programmer available:     http://castleamber.com/
            Happy Customers: http://castleamber.com/testimonials.html
                        


From mefjr75 at hotmail.com  Fri Feb  4 15:50:12 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 4 Feb 2005 12:50:12 -0800
Subject: changing local namespace of a function
In-Reply-To: <cu0lru$8ik$1@joe.rice.edu>
References: <cu0lru$8ik$1@joe.rice.edu>
Message-ID: <1107550212.114358.281200@z14g2000cwz.googlegroups.com>

Hello Bo,
Don't use dict it is a builtin ;)

Also try this stuff out in an interpreter session it is easy and fast
to get your own answers.

>>> def fun(d):
...     __dict__ = d
...     return __dict__
hth,
M.E.Farmer



From ilias at lazaridis.com  Tue Feb 15 13:23:01 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 20:23:01 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <42123751$0$10042$626a14ce@news.free.fr>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr>
	<XX+64LRqnLECFwAV@objmedia.demon.co.uk>
	<cut6t9$sla$1@usenet.otenet.gr>
	<42123751$0$10042$626a14ce@news.free.fr>
Message-ID: <cutem3$2t6$2@usenet.otenet.gr>

bruno modulix wrote:
> Ilias Lazaridis wrote:
> 
>>
>> there are other reasons behind the decision to not support the MinGW 
>> open-source-complier directly out of the main source-code base.
>>
> Yes, of course. The reason is they are lying about their commitment to 
> open source. They are currently trying to port Python to .NET, and when 
> done they'll retire the current implementation and lock everyone to a 
> proprietary platform. I know it's hard to believe, but there are clues...

impressive.

but things are much simpler.

.

-- 
http://lazaridis.com


From M.Waack at gmx.de  Thu Feb 17 15:30:49 2005
From: M.Waack at gmx.de (Mathias Waack)
Date: Thu, 17 Feb 2005 21:30:49 +0100
Subject: How to wrap a class's methods?
References: <4214f167$0$44618$a1866201@visi.com>
Message-ID: <pgbfe2-gl8.ln1@valpo.de>

Grant Edwards wrote:

> I want to subclass an IMAP connection so that most of the
> methods raise an exception if the returned status isn't 'OK'.
> This works, but there's got to be a way to do it that doesn't
> involve so much duplication:
> 
> class MyImap4_ssl(imaplib.IMAP4_SSL):
> 
>     def login(*args):
>         s,r = imaplib.IMAP4_SSL.login(*args)
>         if s!='OK':
>             raise NotOK((s,r))
>         return r
>         
>     def list(*args):
>         s,r = imaplib.IMAP4_SSL.list(*args)
>         if s!='OK':
>             raise NotOK((s,r))
>         return r
>         
>     def search(*args):
>         s,r = imaplib.IMAP4_SSL.search(*args)
>         if s!='OK':
>             raise NotOK((s,r))
>         return r
>         
>     [and so on for another dozen methods]

How about using a delegator: 

class Wrapper:
  funcs = ("login", "list", "search")
  def __init__(self, classobj):
    self.__wrapped = classobj()
  def __getattr__(self, attr):
    if attr in Wrapper.funcs:
      def f(*args):
        f1 = getattr(self.__wrapped, attr)
        s,r = f1(args)
        if s != 'OK': raise NotOk((s,r))
        return r
      return f
    # raise some exception here
imap = Wrapper(imaplib.IMAP4_SSL)

If you wrap all methods you can ignore the if-test. Instead of the
class object you can pass instances to the wrapper if you need
special arguments for initialization. 

I don't like subclassing;)

Mathias

PS: note that we're wrapping the instance's methods, not the class's
methods!


From invalidemail at aerojockey.com  Mon Feb 28 19:14:48 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 28 Feb 2005 16:14:48 -0800
Subject: Scoping issue with import
In-Reply-To: <mailman.3157.1109635002.22381.python-list@python.org>
References: <mailman.3157.1109635002.22381.python-list@python.org>
Message-ID: <1109636088.554435.232960@z14g2000cwz.googlegroups.com>


James Stroud wrote:
> Say I have a module, we'll call it "my_imported_mod". It contains a
function
> in it that calls another function, "myfun". The "myfun" function is
in the
> module "my_main_mod", that imports "my_imported_mod".

[snip]

> How to rectify this with minimal code change? How to let imported
modules know
> about the namespace they are getting imported into? I do not want to
> restructure my code right now.
>
> Thanks in advance for help.


Change it so that my_imported_mod imports my_main_mod.  If A depends on
B, then A should import B, not the other way around.

If there's some good reason why B imports A despite this (and there
could be--say if myfun is some kind of a callback), then you should
probably pass myfun to the function in the imported module as an
argument.  If that's not practical, put myfun into a third module, and
have my_imported_mod import that.

If you want to live dangerously, you could do something like this from
my_main_mod:

   import my_imported_mod
   my_imported_mod.myfun = myfun

I don't recommend it, though, because my_imported_mod is no longer
self-contained (i.e., it's a module not modular).


-- 
CARL BANKS



From ashot at removemolsoftthis.com  Fri Feb  4 19:27:05 2005
From: ashot at removemolsoftthis.com (Ashot)
Date: Fri, 04 Feb 2005 18:27:05 -0600
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot><1107487113.732375.110850@c13g2000cwb.googlegroups.com><opslnmywarej1m1c@ashot><mailman.1865.1107491434.22381.python-list@python.org><opsln54fpwej1m1c@ashot>
	<36hculF51ho2sU1@individual.net><1107530489.308497.103530@g14g2000cwa.googlegroups.com><36hrjpF4ui8fbU1@individual.net>
	<mailman.1911.1107546744.22381.python-list@python.org>
	<36i84qF52ce29U1@individual.net> <opslo127s7ej1m1c@ashot>
	<cu0umf$cja$1@sea.gmane.org>
	<mailman.1936.1107561113.22381.python-list@python.org>
Message-ID: <opslo7jfhqej1m1c@ashot>

whoa, that was quick, looks like it works for me.  Thanks a lot!
It would be nice to be able to set the colors in the prefs file, although  
its possible to edit the pyColorize file as Claudio mentioned.

.a

On Fri, 04 Feb 2005 16:51:26 -0700, Fernando Perez <fperez.net at gmail.com>  
wrote:

> Fernando Perez wrote:
>
>> Ashot wrote:
>>
>>> this is what it looks like:
>>>
>>> http://www.freshraisins.com/sand/ipythonscreen.PNG
>>>
>>> does cygwin have a readline utility in it?  Perhaps this is overriding  
>>> the
>>> correct one?  Thats the only thing I can think of.
>>
>> Hi folks,
>>
>> could you please test under windows the 1.9 version of readline?
>
> OK, make that 1.10:
>
> http://sourceforge.net/project/shownotes.php?release_id=302526
>
> Gary specifically targeted the light background problems with this one,  
> so
> please report here if the whole thing gets fixed.
>
> Regards,
>
> f
>



-- 
==============================
Ashot Petrosian
University of Texas at Austin, Computer Sciences
(views expressed are solely my own)
==============================


From duncan.booth at invalid.invalid  Mon Feb 14 07:27:21 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 14 Feb 2005 12:27:21 GMT
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108370491.792820.142200@z14g2000cwz.googlegroups.com>
	<cuprg2$6rt$1@usenet.otenet.gr> <37bcdkF5bg7knU1@individual.net>
	<cupumi$kfs$1@usenet.otenet.gr> <37bel6F59jvkgU1@individual.net>
	<cuq4d6$fqp$1@usenet.otenet.gr>
Message-ID: <Xns95FD7EAD8A162duncanrcpcouk@127.0.0.1>

Ilias Lazaridis wrote:

>> There is a OS-tool-chain supported on windows, cygwin. 
> 
> this depends on cygwin.dll, which is GPL licensed
> 
> [or am I wrong?]

It is GPL licensed with an amendment which prevents the GPL spreading to 
other open source software with which it is linked.

"In accordance with section 10 of the GPL, Red Hat, Inc. permits programs 
whose sources are distributed under a license that complies with the Open 
Source definition to be linked with libcygwin.a without libcygwin.a itself 
causing the resulting program to be covered by the GNU GPL."


From simon.brunning at gmail.com  Fri Feb 11 06:11:31 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Fri, 11 Feb 2005 11:11:31 +0000
Subject: Python and version control
In-Reply-To: <jHROd.47313$Z14.32739@news.indigo.ie>
References: <XNrOd.1657$Mw3.72@amstwist00>
	<avOdnSfqFtw2z5ffRVn-1w@powergate.ca>
	<tnon01pqep6idn81mhhrtjf8an1p07ut3p@4ax.com>
	<jHROd.47313$Z14.32739@news.indigo.ie>
Message-ID: <8c7f10c605021103114fc1f317@mail.gmail.com>

On Thu, 10 Feb 2005 23:03:43 +0000, Alan Kennedy <alanmk at hotmail.com> wrote:
> In my circles, VSS is most often referred to as Visual Source Unsafe.

I always find it amusing that VSS's icon is a safe - with the door wide open.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From fbasegmezatbcdidotcom  Fri Feb  4 22:54:53 2005
From: fbasegmezatbcdidotcom (Fahri Basegmez)
Date: Fri, 4 Feb 2005 22:54:53 -0500
Subject: returning True, False or None
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com><6Z6dnVfTmdUDopnfRVn-1A@rcn.net>
	<mailman.1946.1107575241.22381.python-list@python.org>
Message-ID: <jvudndJ_-tb53pnfRVn-hQ@rcn.net>


"Michael Spencer" <mahs at telcopartners.com> wrote in message 
news:mailman.1946.1107575241.22381.python-list at python.org...
> Fahri Basegmez wrote:
>> reduce(lambda x, y: x or y, lst)
>>
>> works but when I tried
>>
>> import operator
>> reduce(operator.or_, lst)
>>
>> this did not work.  It pukes
>>
>> Traceback (most recent call last):
>>   File "<interactive input>", line 1, in ?
>> TypeError: unsupported operand type(s) for |: 'NoneType' and 'bool'
>>
>> Any comments?
>>
>> Fahri
>>
>>
> TypeError: unsupported operand type(s) for |: 'NoneType' and 'bool'
>
> operator.or_ is "|" i.e., bitwise, not logical or
>
> Michael
>

That explains it.  Is there a logical or we can use with reduce?

Fahri 




From jimmy at retzlaff.com  Sun Feb  6 09:57:03 2005
From: jimmy at retzlaff.com (Jimmy Retzlaff)
Date: Sun, 6 Feb 2005 06:57:03 -0800
Subject: bad generator performance
Message-ID: <A7B5C22F20EE3C4E95744E2F03F1887F21D3AE@MAYOR.retzlaff.com>

Johannes Ahl-mann wrote:
> i just wondered if there was a concise, clean way of doing this with
> generators which i had overlooked, or whether there was some blatant
> mistake in my code.

Aside from the recursion question...

You don't really give the complete story so it's hard to tell what
exactly is going on. For example, I would assume the recursion is
calling the same method (i.e., depthFirstIterator1 or
depthFirstIterator2), but then you posted separate timing information
for a "recursive helper function" so I'm not so sure. Also there is not
much of a hint as to the nature of your data.

Below is a test where each of your 2 methods calls itself recursively.
To make it work I had to build a data tree - I used the files and
folders in my C:\Python23 directory. In my testing (on Python 2.3.4 on
Windows XP), the generator version takes about 1/4 of the time that the
list version takes. If both versions call the list version of the method
recursively (i.e., you're only getting the benefit of the generator at
the top level of the recursion), the generator version is still about
20% faster.

Timing differences could potentially depend on your data also - things
like how deep vs. wide your tree is.

Jimmy


import os
import time

class Node:
    def __init__(self, pathname):
        self.thisIsAFolder = os.path.isdir(pathname)
        self.children = []
        if self.isFolder():
            for filename in os.listdir(pathname):
                childpathname = os.path.join(pathname, filename)
                self.children.append(Node(childpathname))

    def isFolder(self):
        return self.thisIsAFolder

    def depthFirstIterator1(self, depth = 0):
        ret = [[self, True, depth]]

        if self.isFolder():
          for c in self.children:
            ret = ret + c.depthFirstIterator1(depth = depth + 1)

        return ret + [[self, False, depth]]

    def depthFirstIterator2(self, depth = 0):
        yield [self, True, depth]

        if self.isFolder():
          for c in self.children:
            for y in c.depthFirstIterator2(depth = depth + 1):
              yield y

        yield [self, False, depth]


x = Node(r'C:\Python23')
for iterator in (x.depthFirstIterator1, x.depthFirstIterator2):
    print iterator.__name__,
    start = time.time()
    for item in iterator():
        pass
    print round(time.time()-start, 2)


From xah at xahlee.org  Sat Feb 26 16:38:13 2005
From: xah at xahlee.org (Xah Lee)
Date: 26 Feb 2005 13:38:13 -0800
Subject: generic equivalence partition
In-Reply-To: <1109419631.693212.236890@z14g2000cwz.googlegroups.com>
References: <1109245733.261643.219420@f14g2000cwb.googlegroups.com>
	<1109419631.693212.236890@z14g2000cwz.googlegroups.com>
Message-ID: <1109453893.313217.66290@f14g2000cwb.googlegroups.com>

folks:

when using google to post a reply, it sometimes truncates the subject
line. i.e. [perl-python] is lost. This software error is obvious, they
could not have not noticed it.

another thing more egregious is that google _intentionally_ edit with
people's posts. (e.g. they change email address lines without author's
permission, and they also change program codes so it no longer run).
Please spread these google irresponsibility to all related forums on
software responsibility and online forum issues.

Ostensible incorrect behavior like these by google is egregious enough
to generate a law suit and if such company do not take software
correctness seriously, we must punish them.

Please spread this awareness.

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From Peter.Vandersteegen at gmail.com  Wed Feb 16 10:27:54 2005
From: Peter.Vandersteegen at gmail.com (peter)
Date: 16 Feb 2005 07:27:54 -0800
Subject: renaming 'references' to functions can give recursive problems
In-Reply-To: <1108565645.179340.70600@o13g2000cwo.googlegroups.com>
References: <1108565645.179340.70600@o13g2000cwo.googlegroups.com>
Message-ID: <1108567674.763938.283400@l41g2000cwc.googlegroups.com>

see the topic:
 adding new functionality to a function non-intrusively! and decorators
if you want to add functionality to a function!



From simoninusa2001 at yahoo.co.uk  Sun Feb 20 19:52:55 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 20 Feb 2005 16:52:55 -0800
Subject: Pausing a program - poll/sleep/threads?
In-Reply-To: <cv87u2$k27$1@atlantis.news.tpi.pl>
References: <1108625477.222091.34680@l41g2000cwc.googlegroups.com>
	<1119nf8qqj5gfbe@corp.supernews.com>
	<1108666816.520517.91390@o13g2000cwo.googlegroups.com>
	<1119v7o1h4k8be5@corp.supernews.com>
	<1108699641.787642.310960@f14g2000cwb.googlegroups.com>
	<1108839864.101293.184050@o13g2000cwo.googlegroups.com>
	<1108843518.024709.139640@f14g2000cwb.googlegroups.com>
	<cv87u2$k27$1@atlantis.news.tpi.pl>
Message-ID: <1108947175.673016.205840@c13g2000cwb.googlegroups.com>

Ah yes, that Informit article helped endlessly - I'm all done now - got
the backend to fetch the info from the server every 2secs using a
QThread, then it pass the data back to the GUI frontend by raising a
custom event!

Thanks for all the help folks, now I'm off to compile the new PyQt 3.14
;-)



From ashot at removemolsoftthis.com  Mon Feb  7 02:06:11 2005
From: ashot at removemolsoftthis.com (Ashot)
Date: Mon, 07 Feb 2005 01:06:11 -0600
Subject: IDLE history, Python IDE, and Interactive Python with Vim
References: <opsllommgvb1cml1@ashot>
	<mailman.1983.1107626882.22381.python-list@python.org>
	<opsltet5kmej1m1c@ashot>
Message-ID: <opsltfclp1ej1m1c@ashot>

On Mon, 07 Feb 2005 00:55:07 -0600, Ashot <ashot at removemolsoftthis.com> wrote:

> On Sat, 05 Feb 2005 11:07:40 -0700, Fernando Perez <fperez.net at gmail.com> wrote:
>
>> Hi,
>>
>> Ashot wrote:
>>
>>> This is sort of both Python and Vim related (which is why I've posted to
>>> both newsgroups).
>>
>> [...]
>>
>> I know you've been using ipython recently (the readline color bugs), so perhaps
>> my reply is a bit redundant.  Forgive me if that's the case, I just want to
>> give you some useful info.
>>
>> Just in case you haven't come across these features (the manual is kind of long
>> and dry), I should note that ipython has pretty much everything you've asked
>> for here.  %hist -n dumps your history without line numbers (for copy/paste),
>> %logstart gives you an incremental log (valid python code) of your current
>> session, %save allows you to save a selected group of lines to a file, and
>> %edit will open up $EDITOR (or vi in Unix by default) at the source of any
>> accessible object.  With %pdb, you can even trigger automatically pdb at any
>> uncaught exception (in Emacs, you'll even get the source simultaneously opened,
>> I'm sure something similar could be done for vi).
>
> yup, this is why I've been using it, its (almost exactly :) what I was looking for.  I had tried it before, but was reluctant to use it because the windows terminal is not very appealing.
> Some things I've noticed so far that I think could be improved, some of which are minor but annoying:
>
> 	edit doesn't work with classes even though it says it should, you have to point it to a function in the class (perhaps only in windows)
>
> 	under windows vim/gvim doesn't jump to the line of the function.. you said that this should work in vi, but I'm guessing its a Windows thing
>
> 	**the biggest problem for me is edit forgets code  in which there were errors. for example:"ed" type some nonsense, and ed -p doesn't remember.  Thats putting an awful lot of pressure on getting the syntax right everytime =]  Perhaps I am missing something here?
>
> 	it would be really great if the code executed on save rather than exit, but I'm not sure if this is possible.  This would be very useful for people using an editor not in the console.. that way you wouldn't have to keep opening/closing new editor windows.
>
> 	this isn't a big deal, but it would be nice if there was an easy way to refer to the entire history (for edit/save/etc)
>
> 	would be nice if you could send stuff to the clipboard.

	Sorry, a few more things I forgot to mention having to do with editing multiline entries in the console:

	Autotab setting doesn't seem to have any effect, I have to type "ctrl-o" manually

	Is there a setting that treats multiline entries as a single command, as IDLE does? In otherwords, allowing you to edit the entire entry, going up to previous lines, and treating as one when cycling through the history?  It seems like ipython recognizes these through the hist command, but not when editing or cycling.

	Is it possible to use the "set editing-mode vi" option in ipython since it uses readline?  From reading online, it seems like this should be possible, however it doesn't work for me.   It works in bash, but once I enter either ipython or just regular python the keybindings don't work anymore.

	Again, thanks for your  help.

.a


From M.Waack at gmx.de  Wed Feb 16 16:58:24 2005
From: M.Waack at gmx.de (Mathias Waack)
Date: Wed, 16 Feb 2005 22:58:24 +0100
Subject: Multiple initialization methods?
References: <1108589491.301007.174370@z14g2000cwz.googlegroups.com>
Message-ID: <09sce2-999.ln1@valpo.de>

alex wrote:

> it is possible to define multiple initialization methods so that
> the method is used that fits?
> 
> I am thinking of something like this:
> 
>   def __init__(self, par1, par2):
>     self.init(par1, par2);
> 
>   def __init__(self, par1):
>     self.init(par1, None)
> 
>   def init(self, par1, par2):
>      ...
>      ...
> 
> So if the call is with one parameter only the second class is
> executed (calling the 'init' method with the second parameter set
> to 'None' or whatever. But this example does not work.
> 
> How to get it work?

You have to do the method dispatching by yourself. For variable
length parameter list you could choose this solution: 

def __init__(self, *args):
        if len(args) == 1: self.__setup1(*args)
        elif len(args) == 2: self.__setup2(*args)
        ...
def   __setup1(self, arg1):
        print "setup1"

def __setup2(self, arg1, arg2):
        print "setup2"


Or for different parameter lists which may have the same length my
suggestion would be: 

def __init__(self, **kw):
        self.__dict__.update(kw)

Mathias

PS: anyone working on a patch for multimethod dispatching for python?


From birdfamily at gmail.com  Tue Feb 22 14:34:54 2005
From: birdfamily at gmail.com (Birdman)
Date: 22 Feb 2005 11:34:54 -0800
Subject: 'modal dialogs' with Tkinter
In-Reply-To: <e5063e96.0502220603.4163be98@posting.google.com>
References: <e5063e96.0502220603.4163be98@posting.google.com>
Message-ID: <1109100893.962886.141450@g14g2000cwa.googlegroups.com>

You could try using: EasyGUI    http://www.ferg.org/easygui/

 EasyGUI is different from other GUIs in that EasyGUI is NOT
event-driven. It allows you to program in a traditional linear fashion,
and to put up dialogs for simple input and output when you need to. If
you have not yet learned the event-driven paradigm for GUI programming,
EasyGUI will allow you to be productive with very basic tasks
immediately. Later, if you wish to make the transition to an
event-driven GUI paradigm, you can do so with a more powerful GUI
package such as anygui, PythonCard, Tkinter, wxPython, etc.

It works for me and is easy to modify to your needs.



From philippe at philippecmartin.com  Sun Feb  6 12:12:24 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Sun, 06 Feb 2005 17:12:24 GMT
Subject: pickle/marshal internal format 'life
	expectancy'/backward	compatibility
References: <1107640264.7097.5.camel@localhost>
	<1f7befae05020514046ab10822@mail.gmail.com>
	<mailman.2011.1107674438.22381.python-list@python.org>
Message-ID: <pan.2005.02.06.17.12.19.603193@philippecmartin.com>

> How complicated is your data structure?  Might you just store:

that's the thing: I don't want to know: My goal is to be able to design
my SC applications without having to change the file system every time I
wish to add/subtract data to be store - I should say 'constant' data to be
stored for this pickle solution would only work with data that the SC
application just stores but does not understand/nor needs to.
For instance, the data structure could simple have a name and address to
start with (when the cards get issued) then the customer might want to add
the person's pictures. In such a case, I would not have to release a new
smart card application (could be burned in the silicon) but simply load
the new structure at issuance time.

> Of course, the security of this scheme is dependent on a lot, including
> the strength of sha, your ability to keep your secret key secret, the
> correctness of what I'm saying, etc etc etc.

The crypto/mutual authentification scheme is handled by the smart
card/HSM or in some _very_ light applications, by the smart card and
pycrypto (no HSM or batch card on the "terminal" side)

Regards,

Philippe





On Sun, 06 Feb 2005 02:20:34 -0500, Adam DePrince wrote:

> On Sat, 2005-02-05 at 17:04, Tim Peters wrote:
>> [Philippe C. Martin]
>> > I am looking into using the pickle format to store object/complex data
>> > structures into a smart card as it would make the design of the embedded
>> > application very simple.
>> >
>> > Yet the card might have to stay in the pocket of the customer for a few
>> > years, during which the back office application responsible for
>> > retrieving the information from the card might evolve as well as the
>> > python release it relies upon.
>> >
>> > Is there a commitment for python releases to be able to interpret
>> > 'older' pickle/marshal internal formats ?
>> 
>> Pickle and marshal have nothing in common, and there's no
>> cross-release guarantee about marshal behavior.  Pickles are safe in
>> this respect; indeed, each Python released to date has been able to
>> load pickles created by all earlier Python releases.  Of course a
>> pickle produced by a later Python may not be loadable by an earlier
>> Python, although even in that direction you can get cross-release
>> portability by forcing the newer Python to restrict itself to produce
>> obsolete pickle formats.  Reading Lib/pickletools.py in a current
>> release will explain all this.
> 
> 
> How complicated is your data structure?  Might you just store:
> 
> repr( <mydatastructure> )
> 
> and eval it later?  Trust is an issue; you are vulnerable to malicious
> code, but no more so than with pickle or marshal.
> 
> One quick and dirty way to be a little safer is to "sign" the data you
> store.
> 
> # To save your data
> import sha
> import cPickle
> mysecret = "abc"
> mydata = {"what":"my data structure"}
> f = open( "/tmp/myfile.txt", "w+" )
> mydata = cPickle.dumps( mydata, protocol=0 )
> # I'm assuming this is a flash device ... lets be safe and not assume
> # that write is buffered ... 
> f.write( sha.new( mysecret + mydata ).digest() + mydata)
> 
> 
> 
> # To load your data
> import sha
> import cPickle
> mysecret = "abc
> f = open( "/tmp/myfile.txt", "w+" )
> hash = f.read( sha.digest_size )
> mydata = f.read()
> if sha.new( mysecret + mydata ).digest() != hash:
> 	raise "Somebody is tring to hack you!" 
> mydata = cPickle.loads( mydata )
> 
> Of course, the security of this scheme is dependent on a lot, including
> the strength of sha, your ability to keep your secret key secret, the
> correctness of what I'm saying, etc etc etc.
> 
> 
> 
> 
> Adam DePrince



From ncoghlan at iinet.net.au  Sat Feb  5 10:06:01 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 06 Feb 2005 01:06:01 +1000
Subject: a type without a __mro__?
In-Reply-To: <cu2dem$t7p$1@sea.gmane.org>
References: <1grid1l.7goks6hh1l6yN%aleaxit@yahoo.com>
	<cu2dem$t7p$1@sea.gmane.org>
Message-ID: <4204E0D9.7050102@iinet.net.au>

Fredrik Lundh wrote:
> Alex Martelli wrote:
> 
> 
>>Can anybody suggest where to find (within the standard library) or how
>>to easily make (e.g. in a C extension) a type without a __mro__, except
>>for those (such as types.InstanceType) which are explicitly recorded in
>>the dispatch table copy._deepcopy_dispatch...?
> 
> 
> something like this?
> 
> 
>>>>import re
>>>>x = re.compile("")
>>>>x
> 
> <_sre.SRE_Pattern object at 0x00B2F7A0>
> 
>>>>x.__mro__
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AttributeError: __mro__
> 
>>>>import copy
>>>>type(x) in copy._deepcopy_dispatch
> 
> False
> 
> </F> 

Unfortunately, it *does* have a __deepcopy__ method, so I don't think it 
actually triggers the bug Alex is interested in:

Py> import re
Py> x = re.compile("")
Py> x.__mro__
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
AttributeError: __mro__
Py> from copy import deepcopy
Py> deepcopy(x)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "C:\Python24\lib\copy.py", line 172, in deepcopy
     y = copier(memo)
TypeError: cannot deepcopy this pattern object
Py> x.__deepcopy__
<built-in method __deepcopy__ of _sre.SRE_Pattern object at 0x00B242C0>

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From peter at engcorp.com  Tue Feb 22 17:03:28 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 22 Feb 2005 17:03:28 -0500
Subject: how to interrupt time.sleep ?
In-Reply-To: <19k4miq1ddzn9.11addj27xoc2w$.dlg@40tude.net>
References: <19k4miq1ddzn9.11addj27xoc2w$.dlg@40tude.net>
Message-ID: <T46dnS7Q9eU0MYbfRVn-1Q@powergate.ca>

BOOGIEMAN wrote:
> I have line  "time.sleep(60)"  in my code
> 
> How do I cancel waiting 60 seconds if I want to continue with program 
> imediately? Like "Press some button if you don't want to wait"

You cannot.

> If it can't be canceled what's the other solution to 
> "wait certain time/or press any button to continue" problem ?

Generally you can just use a much shorter sleep time, and a loop
that checks for the condition which interests you.

while True:
     if userWantsToContinue():
         break
     time.sleep(0.25)	# wait a short time


The implementation of userWantsToContinue() depends of course on
what you want it to do.  If you need help with that, be sure to
indicate what platform you're on so the answers can be meaningful
if the solution (as is likely in this case) is not platform-
independent.

-Peter


From irmen.NOSPAM at xs4all.nl  Wed Feb  2 17:46:43 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Wed, 02 Feb 2005 23:46:43 +0100
Subject: Getting a module's byte code, how?
In-Reply-To: <CxcMd.102641$Jk5.35575@lakeread01>
References: <42014e25$0$28975$e4fe514c@news.xs4all.nl>
	<pan.2005.02.02.22.06.22.395829@freelance-developer.com>
	<CxcMd.102641$Jk5.35575@lakeread01>
Message-ID: <42015854$0$28986$e4fe514c@news.xs4all.nl>

Steve Holden wrote:
> Having said which, if the module was loaded from a .pyc file then the 
> bytecode is available from that - take everything but the first eight 
> bytes and use marshal.loads() to turn it back into a code object:

Yup. As I explained in the other message, this is basically
what I'm doing at the moment (with a few twists; it reads the .py
file if no .pyc is available).
But I also want the bytecode of modules that don't have a .pyc file,
possibly because they have already been 'dynamically' loaded from
another bytecode string ;-)

Now, I could ofcourse store the bytecode string that I started
with *inside* the module itself, in a special attribute or so.
This just occurred to me and I think it's a possible solution.
But the bytecodes must be stored by Python itself somewhere
already... because Python is able to execute my module... right?
I want them! :-)

> Note that the ugly details *might* change, and that byte codes are 
> version-dependent.

I know, but this fact was not yet mentioned in the Pyro manual.
Thanks for reminding me, I'll add it.

--Irmen


From philippecmartin at sbcglobal.net  Mon Feb  7 12:11:43 2005
From: philippecmartin at sbcglobal.net (Philippe C. Martin)
Date: Mon, 07 Feb 2005 11:11:43 -0600
Subject: socket question
Message-ID: <1107796303.7067.11.camel@localhost>

Hi,

I am following a few tutorial and this howto:


*************************************************************
...........
What happens in the web server is a bit more complex. First, the web
server creates a "server socket".

    #create an INET, STREAMing socket
    serversocket = socket.socket(
        socket.AF_INET, socket.SOCK_STREAM)
    #bind the socket to a public host, 
    # and a well-known port
    serversocket.bind((socket.gethostname(), 80))
    #become a server socket
    serversocket.listen(5)

A couple things to notice: we used socket.gethostname() so that the
socket would be visible to the outside world. If we had used s.bind(('',
80)) or s.bind(('localhost', 80)) or s.bind(('127.0.0.1', 80)) we would
still have a "server" socket, but one that was only visible within the
same machine.
...........
*************************************************************

My problem is that I cannot connect to my server if the client is not on
the same PC (although I'm doing the above).
Also:
1) my server has more than one IP addresses
2) my server does not have any DNS name


... so I want to connect to an IP address that I can ping but has no
name.


How can I do that ?

Regards,

Philippe
















-- 
***************************
Philippe C. Martin
SnakeCard LLC
www.snakecard.com
***************************



From davidf at sjsoft.com  Tue Feb  1 02:49:57 2005
From: davidf at sjsoft.com (David Fraser)
Date: Tue, 01 Feb 2005 09:49:57 +0200
Subject: [Python-Announce] cfgparse v01_00 released
In-Reply-To: <mailman.1613.1107137102.22381.python-list@python.org>
References: <mailman.1613.1107137102.22381.python-list@python.org>
Message-ID: <ctncb6$6hg$1@ctb-nnrp2.saix.net>

Dan Gass wrote:
> I'm pleased to announce the initial release of cfgparse (V01_00)
>  
> Background
> -------------------------------------------------------------
> cfgparse is a more convenient, flexible, and powerful module for
> parsing configuration files than the standard library ConfigParser
> module. cfgparse uses a more declarative style modelled after the
> popular optparse standard library module.
> 
> cfgparse can optionally cooperate with the optparse module to provide
> coordination between command line and configuration file options. In
> addition, the cooperation can be used to allow the user to control
> features of the parser from the command line.

I like this, its really nice that it fits well with optparse.
I read through the docs, mostly it seems very logical, the following 
things stood out to me as not really fitting:

http://cfgparse.sourceforge.net/cfgparse-round-trip-set.html
It doesn't seem logical that in order to modify the option in the 
desired section correctly, you need to pass the config file in. The keys 
argument in the option itself should be able to determine this.

http://cfgparse.sourceforge.net/node24.html
The use of <b> and <v> for quoting seems obscure. Would it not be better 
to use pythonic triple-quoted strings?
On first glance they look like markup tags rather than multi-line 
continuations (particularly <b> looks like "bold").

The fact that lines without an equals sign are ignored seems a bit 
lenient ...

It also seems strange how different the structure is between the 
ini-style and the Python-style formats:
http://cfgparse.sourceforge.net/cfgparse-python.html

driver = 'ethernet'
path = { 'DEFAULT' : '192.168.0.99',
          'DEV0'    : '192.168.0.0',
          'DEV1'    : '192.168.0.1' }

Is equivalent to:

[DEFAULT]
driver = 'ethernet'
path = 192.168.0.99
[DEV0]
path = 192.168.0.0
[DEV1]
path = 192.168.0.1

I wonder whether it would be better to use Python classes to represent 
the same thing:

class DEFAULT:
   driver = 'ethernet'
   path = '192.168.0.99'

class DEV0(DEFAULT):
   path = '192.168.0.0'

class DEV1(DEFAULT):
   path = '192.168.0.1'

This seems to me to bear more logical structure resemblance to the 
ini-style format.

Otherwise really cool!

David


From jeff at ccvcorp.com  Tue Feb  8 15:41:12 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Tue, 08 Feb 2005 12:41:12 -0800
Subject: variable declaration
In-Reply-To: <MSGID_2=3A5025=2F3.131_4208c092@fidonet.org>
References: <cu2l5t$cf9$01$1@news.t-online.com>
	<MSGID_2=3A5025=2F3.131_4208c092@fidonet.org>
Message-ID: <110i8st7n7n084a@corp.supernews.com>

Alexander Zatvornitskiy wrote:

> Another example. Let say you have variable PowerOfGenerator in your program.
> But, it is only active power, so you have to (1)rename PowerOfGenerator to
> ActivePowerOfGenerator, (2)calculate ReactivePowerOfGenerator, and (3)calculate
> new PowerOfGenerator by formula
>   PowerOfGenerator=sqrt(ReactivePowerOfGenerator**2+ActivePowerOfGenerator**2)
> With var declarations, on step (1) you just rename PowerOfGenerator to
> ActivePowerOfGenerator in the place of its declaration, and compile your
> program. Compiler will show you all places where you have to rename variables.
> After it, on step (3) you can safely and peacefully add new PowerOfGenerator
> variable.

You can also get all places where said variable exists by using grep, 
or your editor's search feature.  I don't see how a var declaration 
gains you anything over 'grep PowerOfGenerator *.py' ...

Jeff Shannon
Technician/Programmer
Credit International




From steven.bethard at gmail.com  Wed Feb 16 16:54:12 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 16 Feb 2005 14:54:12 -0700
Subject: Multiple initialization methods?
In-Reply-To: <1108589491.301007.174370@z14g2000cwz.googlegroups.com>
References: <1108589491.301007.174370@z14g2000cwz.googlegroups.com>
Message-ID: <Q7SdncXm4ZifXI7fRVn-gg@comcast.com>

alex wrote:
> I am thinking of something like this:
> 
>   def __init__(self, par1, par2):
>     self.init(par1, par2);
> 
>   def __init__(self, par1):
>     self.init(par1, None)
> 
>   def init(self, par1, par2):
>      ...
>      ...
> 
> So if the call is with one parameter only the second class is executed
> (calling the 'init' method with the second parameter set to 'None' or
> whatever. But this example does not work. 

Why don't you just write this as:

def __init__(self, par1, par2=None):
     self.init(par1, par2)

STeVe


From eugene at boardkulture.com  Sat Feb  5 23:53:07 2005
From: eugene at boardkulture.com (EuGeNe)
Date: Sun, 06 Feb 2005 05:53:07 +0100
Subject: bicyclerepairman python24 windows idle :(
In-Reply-To: <1107577226.960946.106580@l41g2000cwc.googlegroups.com>
References: <cu0f45$knq$1@aphrodite.grec.isp.9tel.net>
	<1107577226.960946.106580@l41g2000cwc.googlegroups.com>
Message-ID: <cu47u3$l9q$1@aphrodite.grec.isp.9tel.net>

Kim Changjune wrote:
> EuGeNe wrote:
> 
>>Hi there,
>>
>>I am no expert but wanted to give bicyclerepairman 0.9 a go just to
> 
> see
> 
>>what a refactoring browser is and does. Followed every step of the
>>install, I think, but idle doesn't start with the RepairMan section
> 
> in
> 
>>config-extensions.def ... is it incompatible with 2.4?
>>
>>Thanks for your help.
>>
>>--
>>EuGeNe
> 
> 
> There seems to be a change in idlelib in Python 2.4.
> 
> Apply following patch to BicycleRepairMan_Idle.py:
> 
> @@ -87,6 +87,7 @@
>              mbar = editwin.menubar
>              editwin.menudict[name] = menu = Menu(mbar, name = name)
>              mbar.add_cascade(label = label, menu = menu, underline =
> underline)
> +            self.editwin.fill_menus(self.menudefs)
> 
>              # Initialize Bicyclerepairman and import the code
>              path = self.editwin.io.filename
> 

thanks for the tip ... unfortunately it doesn't work either. IDLE 
doesn't start.

-- 
EuGeNe

[----
www.boardkulture.com
www.actiphot.com
www.xsbar.com
----]


From rson at new.rr.com  Wed Feb  9 15:36:52 2005
From: rson at new.rr.com (hawkmoon269)
Date: 9 Feb 2005 12:36:52 -0800
Subject: probably weird or stupid newbie dictionary question
In-Reply-To: <36up5bF564mc5U1@individual.net>
References: <1107962661.011759.30100@f14g2000cwb.googlegroups.com>
	<36up5bF564mc5U1@individual.net>
Message-ID: <1107981412.850268.270580@c13g2000cwb.googlegroups.com>

That makes sense.  Thanks. :-)

h



From jgamble at ripco.com  Sat Feb 26 15:42:37 2005
From: jgamble at ripco.com (John M. Gamble)
Date: Sat, 26 Feb 2005 20:42:37 +0000 (UTC)
Subject: any Python equivalent of Math::Polynomial::Solve?
References: <just-420C1F.16423926022005@news1.news.xs4all.nl>
	<cvqgn5$n0b$1@e250.ripco.com>
	<just-8EF886.20462126022005@news1.news.xs4all.nl>
Message-ID: <cvqmvt$2rm$1@e250.ripco.com>

In article <just-8EF886.20462126022005 at news1.news.xs4all.nl>,
Just  <just at xs4all.nl> wrote:
>
>Heh, how big are the odds you find the author of an arbitrary Perl 
>module on c.l.py...
>

Hey, that's why it's called lurking.

>
>Any will do. As I wrote in another post, I'm currently only looking for 
>a quintic equation solver, which your module does very nicely.
>
>> The
>> original source for the algorithm used in the module is
>> from Hiroshi Murakami's Fortran source, and it shouldn't
>> be too difficult to repeat the translation process to python.
>
>Ah ok, I'll try to locate that (following the instruction in Solve.pm 
>didn't work for me :( ).
>

Ouch.  I just did a quick search and found that that site has undergone
a few changes, and the code that i reference is missing.  A few other
links in the docs are stale too.  I need to update the documentation.

Anyway, doing a search for 'hqr' and Eispack got me a lot of sites.
In particular, this one is pretty friendly:

<http://netlib.enseeiht.fr/eispack/>

Look at the source for balanc.f (does the prep-work) and hqr.f
(does the solving).  Minor annoyance: the real and imaginary
parts of the roots are in separate arrays.  I combined them into
complex types in my perl source, in case you want to make a
comparison.

Of course, all this may be moot if the other suggestions
work out.

-- 
	-john

February 28 1997: Last day libraries could order catalogue cards
from the Library of Congress.


From gsakkis at rutgers.edu  Sat Feb 19 21:23:39 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: Sat, 19 Feb 2005 21:23:39 -0500
Subject: [ANN] Python 2.4 Quick Reference available
References: <cv79sj$mgk$1@aphrodite.grec.isp.9tel.net>
	<1108831318.290846.5930@z14g2000cwz.googlegroups.com>
	<qnkll9kv09y.fsf@arbutus.physics.mcmaster.ca>
Message-ID: <37qaleF5gd7bcU1@individual.net>


"David M. Cooke" <cookedm+news at physics.mcmaster.ca> wrote in message
news:qnkll9kv09y.fsf at arbutus.physics.mcmaster.ca...
> "Pete Havens" <peter.havens at gmail.com> writes:
>
> > The is awesome! Thanks. I did notice one thing while reading it. In the
> > "File Object" section, it states:
> >
> > "Created with built-in functions open() [preferred] or its alias
> > file()."
> >
> > ...this seems to be the opposite of the Python documentation:
> >
> > "The file() constructor is new in Python 2.2. The previous spelling,
> > open(), is retained for compatibility, and is an alias for file()."
>
> Except if you look at the current development docs
> (http://www.python.org/dev/doc/devel/lib/built-in-funcs.html) it says
>
> """
> The file() constructor is new in Python 2.2 and is an alias for
> open(). Both spellings are equivalent. The intent is for open() to
> continue to be preferred for use as a factory function which returns a
> new file object. The spelling, file is more suited to type testing
> (for example, writing "isinstance(f, file)").
> """
>
> ... which more accurately reflects what I believe the consensus is
> about the usage of open vs. file.
>
> -- 
> |>|\/|<
> /--------------------------------------------------------------------------\
> |David M. Cooke
> |cookedm(at)physics(dot)mcmaster(dot)ca


Still the word "open" sounds too general if the meaning is "open a file-like object"; OTOH this
could be a good thing if in some future version "open('http://www.python.org')" was e.g. an alias to
urllib2.urlopen.

George






From onurb at xiludom.gro  Tue Feb 15 13:38:26 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Tue, 15 Feb 2005 19:38:26 +0100
Subject: os.walk() usage
In-Reply-To: <cut8ur$3v6$1@solaris.cc.vt.edu>
References: <cut8ur$3v6$1@solaris.cc.vt.edu>
Message-ID: <421241a3$0$17730$626a14ce@news.free.fr>

rbt wrote:
> I'm trying to write very small, modular code as functions to break up a 
> big monolithic script that does a file system search for particular 
> strings. The script works well, but it's not easy to maintain or add 
> features to.
> 
> I'd like to have a function that builds a list of files with os.walk() 
> and then have other functions accept that list as a parameter and modify 
> it as needed. For example, if the user has specified that certain files 
> and folders be excluded from the walk, I'd like to have functions like 
> this:
> 
> def build_list(path):
>     fs_list = os.walk(path)
>     return fs_list
> 
> def skip_files(fs_list):
>     remove files
>     return fs_list
> 
> def skip_dirs(fs_list):
>     remove dirs
>     return fs_list
> 
> def search(fs_list):
>     pass
> 
> The problem I'm encountering is passing the list to other functions. 

err...

search(skip_files(skip_dirs(build_list(path)))) ?

What's your problem *exactly* ?-)

BTW, you may want to have a look at the path module :
http://www.jorendorff.com/articles/python/path/

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for 
p in 'onurb at xiludom.gro'.split('@')])"


From fredrik at pythonware.com  Tue Feb  8 07:39:17 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 13:39:17 +0100
Subject: User Identification
References: <slrnd0hc3d.1pq.rparnes@debian.localdomain>
Message-ID: <cuabr1$9hf$1@sea.gmane.org>

Bob Parnes wrote:

>I have a python program on a server of an all-linux network. It needs to
> record the user name running it. Is there a way for the program to extract
> the name from the system without a separate log-in dialog?

how about:

>>> import getpass
>>> getpass.getuser()
'gromit'

</F> 





From gsakkis at rutgers.edu  Fri Feb 11 16:13:52 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: Fri, 11 Feb 2005 16:13:52 -0500
Subject: check if object is number
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
	<374ho0F560ughU1@individual.net>
	<66WdnbJbuf5yj5DfRVn-iA@comcast.com>
	<1108155272.438423.177460@l41g2000cwc.googlegroups.com>
Message-ID: <374lgtF57uvn2U1@individual.net>


"Michael Hartl" <mhartl at post.harvard.edu> wrote in message
news:1108155272.438423.177460 at l41g2000cwc.googlegroups.com...
> As luck would have it, isnumber is a built-in Python function:
>
> >>> isnumber(1)
> True
> >>> isnumber(1.0)
> True
> >>> isnumber('1')
> False
>
> Michael
>
> --
> Michael D. Hartl, Ph.D.
> Chief Technology Officer
> http://quarksports.com/
>

Huh ? What python version has this ? Surely not 2.3 and 2.4.

George





From mirandacascade at yahoo.com  Fri Feb 25 03:01:04 2005
From: mirandacascade at yahoo.com (mirandacascade at yahoo.com)
Date: 25 Feb 2005 00:01:04 -0800
Subject: accessor/mutator functions
Message-ID: <1109315698.002207.245690@g14g2000cwa.googlegroups.com>

When I look at how classes are set up in other languages (e.g. C++), I
often observe the following patterns:
1) for each data member, the class will have an accessor member
function (a Get<whatever> function)
2) for each data member, the class will have a mutator member function
(a Set<whatver> function)
3) data members are never referenced directly; they are always
referenced with the accessor and mutator functions

My questions are:
a) Are the three things above considered pythonic?
b) What are the tradeoffs of using getattr() and setattr() rather than
creating accessor and mutator functions for each data member?



From zsolt-googleP6463 at mailblocks.com  Thu Feb 17 16:32:00 2005
From: zsolt-googleP6463 at mailblocks.com (pythonUser_07)
Date: 17 Feb 2005 13:32:00 -0800
Subject: Whats up with re module vs pre
Message-ID: <1108675920.201110.81250@z14g2000cwz.googlegroups.com>

This is a very generic observation as I don't have a lot of specifics
with me right now.  I have noticed over the past two years that the
python "re" module is somewhat unreliable.  At the suggestion of
someone quite some time ago, I started to use the deprecated "pre"
module. "import pre as re". All my problems went away.

So here I am two years later, writing another script and I had
forgotten about "pre" and wallah

$ python proc.py
Traceback (most recent call last):
  File "proc.py", line 39, in ?
    c = collect("nohup.out")
  File "proc.py", line 20, in collect
    m = p.search(cont)
RuntimeError: maximum recursion limit exceeded

As soon as I switched "import re" to "import pre as re" my program
worked as expected.   In the words of Jerry Sienfeld, what's up with
that?



From steven.bethard at gmail.com  Wed Feb  2 23:25:02 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 02 Feb 2005 21:25:02 -0700
Subject: Easy Q: dealing with object type
In-Reply-To: <42019545$1@nntp.zianet.com>
References: <420181b1$1@nntp.zianet.com>
	<1107396669.028096.301290@g14g2000cwa.googlegroups.com>
	<42019545$1@nntp.zianet.com>
Message-ID: <SJmdnddykYoAOpzfRVn-hA@comcast.com>

Erik Johnson wrote:
> "Erick" <idadesub at gmail.com> wrote in message
> news:1107396669.028096.301290 at g14g2000cwa.googlegroups.com...
> 
>>Ah, you're running into the "old-style classes vs. new style classes".
>>Try subclassing from "object".
>>
>>For example:
>>
>>>>>class A(object):
> 
> That works! :) I guess I am fortunate to be running 2.2 - looks kinda ugly
> prior to that.

It's not horrible:

py> class A:
...     pass
...
py> class B:
...     pass
...
py> a = A()
py> a.__class__ == A
True
py> a.__class__ == B
False

Still, if you can use new-style classes, you should.

Also, you should probably Google for "duck typing".  Generally, in 
Python it is frowned upon to check the type of an object.  There are 
times when it's necessary, but if you're just starting off, my guess is 
that you haven't discovered one of these times yet...

Steve


From fredrik at pythonware.com  Wed Feb 16 12:54:43 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 16 Feb 2005 18:54:43 +0100
Subject: Getting milliseconds in Python
References: <1108565135.167562.196830@z14g2000cwz.googlegroups.com><37h5epF5ck38lU2@individual.net><1108571009.698970.152020@z14g2000cwz.googlegroups.com>
	<cv0100$715$1@eeyore.INS.cwru.edu>
Message-ID: <cv017f$3u9$1@sea.gmane.org>

Brian Beck wrote:

> That IS what you want.
>
> seconds * 100 = milliseconds

are you sure you know what a millisecond is?

(duck) 





From mike at skew.org  Wed Feb 23 01:56:30 2005
From: mike at skew.org (Mike Brown)
Date: Tue, 22 Feb 2005 23:56:30 -0700 (MST)
Subject: unicode(obj, errors='foo') raises TypeError - bug?
Message-ID: <200502230656.j1N6uUWd018521@chilled.skew.org>

This works as expected (this is on an ASCII terminal):

>>> unicode('asdf\xff', errors='replace')
u'asdf\ufffd'


This does not work as I expect it to:

>>> class C:
...   def __str__(self):
...      return 'asdf\xff'
...
>>> o = C()
>>> unicode(o, errors='replace')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: coercing to Unicode: need string or buffer, instance found



Shouldn't it work the same as calling unicode(str(self), errors='replace')?

It doesn't matter what value you use for 'errors' (ignore, replace, strict);
you'll get the same TypeError.

What am I doing wrong? Is this a bug in Python?


From steven at lczmsoft.com  Mon Feb 28 03:38:24 2005
From: steven at lczmsoft.com (steven at lczmsoft.com)
Date: 28 Feb 2005 00:38:24 -0800
Subject: Hey, How Do I Distribute my New Completed Python Project?
Message-ID: <1109579904.014493.222540@o13g2000cwo.googlegroups.com>

I'v just completed a small python project, which includes a main py
file and a couple of classes in seperated py files.  I can run it under
the development directory, but how to distribute them?  Is there any
good practice here?

Thanks in advance.

-
narke



From t-meyer at ihug.co.nz  Sun Feb 13 20:19:06 2005
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Mon, 14 Feb 2005 14:19:06 +1300
Subject: OS env for Windows
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E802107861@its-xchg4.massey.ac.nz>
Message-ID: <ECBA357DDED63B4995F5C1F5CBE5B1E801DAFE5C@its-xchg4.massey.ac.nz>

> Is there any other way
> of distinguishing between XP and 2000 I wonder?

WinXP SP2:

>>> import win32api
>>> major, minor, spack, platform, ver_str = win32api.GetVersionEx()
>>> print major, minor, spack, platform, ver_str
5 1 2600 2 Service Pack 2

WinNT SP4:

>>> import win32api
>>> major, minor, spack, platform, ver_str = win32api.GetVersionEx()
>>> print major, minor, spack, platform, ver_str
5 0 2195 2 Service Pack 4

=Tony.Meyer



From ncoghlan at iinet.net.au  Sat Feb  5 02:29:31 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 05 Feb 2005 17:29:31 +1000
Subject: PythonWin and PyWin32
In-Reply-To: <1107586934.983669.201020@z14g2000cwz.googlegroups.com>
References: <1107586934.983669.201020@z14g2000cwz.googlegroups.com>
Message-ID: <420475DB.1070907@iinet.net.au>

Chris Lott wrote:
> Can someone elaborate for me what the pywin32 project is exactly? Is
> PythonWin a replacement for idle? More to the point, do I need to worry
> about this as I am learning about Python, since Idle and the Windows
> Installer seem to work fine on my XP box?

Python and IDLE work fine on Windows.

pywin32 is about better support for Windows specific idioms (e.g. easier COM 
support, more convenient registry access).

Pythonwin is a windows native Python IDE built using MFC. Idle uses TKinter and 
doesn't really feel like a standard Windows app.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From simoninusa2001 at yahoo.co.uk  Fri Feb  4 18:44:18 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 4 Feb 2005 15:44:18 -0800
Subject: WYSIWYG wxPython "IDE"....?
Message-ID: <1107560658.584623.303310@o13g2000cwo.googlegroups.com>

I'm writing my 2nd large wxPython program, and after the problems I
found doing the first's layout in code, I'd like to look at using a
'WYSIWYG' IDE, like VisualStudio does for MFC.

I've tried a few that I found, wxGlade is probably the best, although
it seems to be not 100% WYSIWYG (like the widgets in the preview are
not much like the final program), wxDesigner has a horrid GUI for a GUI
designer! VisualWX gave me the 'now what?' feeling when I started a new
project.....

I find the sizer layout thing is what's holding these programs back, is
there another wxWidgets layout system, so that I could just drag'n'drop
widgets wherever I want in a window, more like Qt or MFC?

I'd like to just put a TextCtrl with a few buttons underneath it
without having to create two boxsizers or a gridsizer!

I'd like to create something like the main XMMS (or Winamp) window:

http://xmms.org/files/Skins/images/winamp_x_xmms.png

But that would be a 3-way vertical sizer, a 2-way horizontal and a
2-way vertical at least just for the main (top left) window.



From robin at SPAMREMOVEjessikat.fsnet.co.uk  Sun Feb 20 09:58:01 2005
From: robin at SPAMREMOVEjessikat.fsnet.co.uk (Robin Becker)
Date: Sun, 20 Feb 2005 14:58:01 +0000
Subject: introspection inquiry
In-Reply-To: <1108910710.985704.264430@c13g2000cwb.googlegroups.com>
References: <1108910710.985704.264430@c13g2000cwb.googlegroups.com>
Message-ID: <4218A579.2060503@jessikat.fsnet.co.uk>

mirandacascade at yahoo.com wrote:
...
> 
> My question is this: what can be substituted for <whatever> that will
> make the example above work?
> 

self.__class__.__name__
-- 
Robin Becker


From cjbottaro at alumni.cs.utexas.edu  Wed Feb 16 11:36:38 2005
From: cjbottaro at alumni.cs.utexas.edu (Christopher J. Bottaro)
Date: Wed, 16 Feb 2005 10:36:38 -0600
Subject: super not working in __del__  ?
References: <cuu0pu$t44$1@sea.gmane.org> <cuuqrr$f1o$1@sea.gmane.org>
Message-ID: <cuvslt$ii5$1@sea.gmane.org>

Fredrik Lundh wrote:

>     "Warning: Due to the precarious circumstances under which __del__()
>     methods are invoked, exceptions that occur during their execution are
>     ignored, and a warning is printed to sys.stderr instead. Also, when
>     __del__() is invoked in response to a module being deleted (e.g.,
>     when execution of the program is done), other globals referenced by
>     the __del__() method may already have been deleted. For this
>     reason, __del__() methods should do the absolute minimum needed
>     to maintain external invariants."

Jeff Epler wrote:

> *???????Bugs?and?caveats:?The?destruction?of?modules?and?objects?in
> modules?is *???????done?in?random?order;?this?may?cause?destructors
> (__del__()?methods)?to *???????fail?when?they?depend?on?other?objects
> (even?functions)?or?modules.

2 Questions...
1)  Why does this never happen in C++?  Or does it, its just never happened
to me?
2)  I can understand random destruction of instantiated objects, but I find
it weird that class definitions (sorry, bad terminology) are destroyed at
the same time.  So __del__ can't safely instantiate any classes if its
being called as a result of interpreter shutdown?  Boo...

Oh well, thanks for the help...now I know.



From dave at pythonapocrypha.com  Sun Feb 13 22:30:38 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Sun, 13 Feb 2005 20:30:38 -0700
Subject: Kill GIL
In-Reply-To: <86sm405d38.fsf@guru.mired.org>
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>	<cum62t$3fb$1@panix2.panix.com>	<mailman.2463.1108256227.22381.python-list@python.org>	<868y5t6sal.fsf@guru.mired.org>
	<cumoue$9ur$1@panix2.panix.com> <86sm405d38.fsf@guru.mired.org>
Message-ID: <42101B5E.1090702@pythonapocrypha.com>

Mike Meyer wrote:
> aahz at pythoncraft.com (Aahz) writes:
> 
> 
>>In article <868y5t6sal.fsf at guru.mired.org>, Mike Meyer  <mwm at mired.org> wrote:
>>
>>>Here here. I find that threading typically introduces worse problems
>>>than it purports to solve.
>>
>>Threads are also good for handling blocking I/O.
> 
> 
> Actually, this is one of the cases I was talking about. I find it
> saner to convert to non-blocking I/O and use select() for
> synchronization. That solves the problem, without introducing any of
> the headaches related to shared access and locking that come with
> threads.

This whole tangent to the original thread intrigues me - I've found that if 
you're going to use threads in any language, Python is the one to use because 
the GIL reduces so many of the problems common to multithreaded programming (I'm 
not a huge fan of the GIL, but its presence effectively prevents a pure Python 
multithreaded app from corrupting the interpreter, which is especially handy for 
those just learning Python or programming).

I've done a lot of networking applications using select/poll (usually for 
performance reasons) and found that going that route *can* in some cases 
simplify things but it requires looking at the problem differently, often from 
perspectives that seem unnatural to me - it's not just an implementation detail 
but one you have to consider during design.

One nice thing about using threads is that components of your application that 
are logically separate can remain separate in the code as well - the 
implementations don't have to be tied together at some common dispatch loop, and 
a failure to be completely non-blocking in one component doesn't necessarily 
spell disaster for the entire app (I've had apps in production where one thread 
would die or get hung but I was relieved to find out that the main service 
remained available).

Another related benefit is that a lot of application state is implicitly and 
automatically managed by your local variables when the task is running in a 
separate thread, whereas other approaches often end up forcing you to think in 
terms of a state machine when you don't really care* and as a by-product you 
have to [semi-]manually track the state and state transitions - for some 
problems this is fine, for others it's downright tedious.

Anyway, if someone doesn't know about alternatives to threads, then that's a 
shame as other approaches have their advantages (often including a certain 
elegance that is just darn *cool*), but I wouldn't shy away from threads too 
much either - especially in Python.

-Dave

* Simple case in point: a non-blocking logging facility. In Python you can just 
start up a thread that pops strings off a Queue object and writes them to an 
open file. A non-threaded version is more complicated to implement, debug, and 
maintain.


From sjmachin at lexicon.net  Sat Feb 26 21:06:32 2005
From: sjmachin at lexicon.net (John Machin)
Date: Sun, 27 Feb 2005 13:06:32 +1100
Subject: fdups: calling for beta testers
References: <421f97eb$1@news.vo.lu>
	<1109380525.262724.275780@g14g2000cwa.googlegroups.com>
	<422044b9$1@news.vo.lu>
	<1109451464.546948.174830@z14g2000cwz.googlegroups.com>
	<4220fdd7$1@news.vo.lu>
Message-ID: <4r8221tlstaq55j9uv7qls8r63jqgr38nu@4ax.com>

On Sat, 26 Feb 2005 23:53:10 +0100, Patrick Useldinger
<pu.news.001 at gmail.com> wrote:

> I've tested it intensively

"Famous Last Words" :-)

>Thanks for your feedback!

Here's some more:

(1) Manic s/w producing lots of files all the same size: the Borland
C[++] compiler produces a debug symbol file (.tds) that's always
384KB; I have 144 of these on my HD, rarely more than 1 in the same
directory.

Here's a snippet from a duplicate detection run:

DUP|393216|2|\devel\delimited\build\lib.win32-1.5\delimited.tds|\devel\delimited\build\lib.win32-2.1\delimited.tds
DUP|393216|2|\devel\delimited\build\lib.win32-2.3\delimited.tds|\devel\delimited\build\lib.win32-2.4\delimited.tds

(2) There appears to be a flaw in your logic such that it will find
duplicates only if they are in the *SAME* directory and only when
there are no other directories with two or more files of the same
size. The above duplicates were detected only when I made the
following changes to your script:


--- fdups       Sat Feb 26 06:41:36 2005
+++ fdups_jm.py Sun Feb 27 12:18:04 2005
@@ -29,13 +29,14 @@
         self.count = self.totalsize     = self.inodecount =
self.slinkcount = 0
         self.gain  = self.bytescompared = self.bytesread  =
self.inodecount = 0
         for toplevel in args:
-            os.path.walk(toplevel, self.buildList, None)
+            os.path.walk(toplevel, self.updateDict, None)
         if self.count > 0:
             self.compare()

-    def buildList(self,arg,dirpath,namelist):
-        """ build a dictionnary of files to be analysed, indexed by
length """
-        files = {}
+    def updateDict(self,arg,dirpath,namelist):
+        """ update a dictionary of files to be analysed, indexed by
length """
+        # files = {}
+        files = self.compfiles
         for filepath in namelist:
             fullpath = os.path.join(dirpath,filepath)
             if os.path.isfile(fullpath):
@@ -51,20 +52,23 @@
                         if  size >= MIN_FILESIZE:
                             self.count += 1
                             self.totalsize += size
+                            # is above totalling in the wrong place?
                             if size not in files:
                                 files[size]=[fullpath]
                             else:
                                 files[size].append(fullpath)
-        for size in files:
-            if len(files[size]) != 1:
-                self.compfiles[size]=files[size]
+        # for size in files:
+        #     if len(files[size]) != 1:
+        #         self.compfiles[size]=files[size]

     def compare(self):
         """ compare all files of the same size  - outer loop """
         sizes=self.compfiles.keys()
         sizes.sort()
         for size in sizes:
-            self.comparefiles(size,self.compfiles[size])
+            list_of_filenames = self.compfiles[size]
+            if len(list_of_filenames) > 1:
+               self.comparefiles(size, list_of_filenames)

     def comparefiles(self,size,filelist):
         """ compare all files of the same size  - inner loop """


(3) Your fdups-check gadget doesn't work on Windows; the commands
module works only on Unix but is supplied with Python on all
platforms. The results might just confuse a newbie:

(1, "'{' is not recognized as an internal or external
command,\noperable program or batch file.")

Why not use the Python filecmp module?

Cheers,
John


From jdhunter at ace.bsd.uchicago.edu  Mon Feb 21 21:06:40 2005
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Mon, 21 Feb 2005 20:06:40 -0600
Subject: MatPlotLib.MatLab troubles (how to install/run
 matplotlib.PyLab?)
In-Reply-To: <1109033814.888677.286240@c13g2000cwb.googlegroups.com> ("Dr.
	Colombes"'s message of "21 Feb 2005 16:56:54 -0800")
References: <1109033814.888677.286240@c13g2000cwb.googlegroups.com>
Message-ID: <m3r7j9z6tr.fsf@peds-pc311.bsd.uchicago.edu>

>>>>> "Colombes" == Colombes  <DrColombes at yahoo.com> writes:

    Colombes> matplotlib.matlab deprecated, please import
    Colombes> matplotlib.pylab or simply pylab instead.  See
    Colombes> http://matplotlib.sf.net/matplotlib_to_pylab.py for a
    Colombes> script which explains this change and will automatically
    Colombes> convert your python scripts that use matplotlib.matlab.
    Colombes> This change was made because we were concerned about
    Colombes> trademark infringement on The Mathwork's trademark of
    Colombes> matlab.

    Colombes> Unfortunately, the above URL does not exist.

Oops -- that should be
http://matplotlib.sourceforge.net/matlab_to_pylab.py

In a nutshell, wherever you previously imported matplotlib.matlab you
can import matplotlib.pylab or equivalently, simply pylab

OLD:
from matplotlib.matlab import plot

NEW:
from pylab import plot

The script linked above will recursively search and replace these
strings for you in your scripts directory.

JDH


From cam.ac.uk at mh391.invalid  Mon Feb 21 02:50:20 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Mon, 21 Feb 2005 07:50:20 +0000
Subject: python2.4 generator expression > python2.3 list expression
In-Reply-To: <mailman.2882.1108961815.22381.python-list@python.org>
References: <mailman.2882.1108961815.22381.python-list@python.org>
Message-ID: <cvc3rv$1mn$1@gemini.csx.cam.ac.uk>

snacktime wrote:
> I need to convert a generator expression to a list expression so it
> will work under python 2.3.
> 
> I rewrote this:
> 
> for c in range(128):
>   even_odd = (sum(bool(c & 1<<b) for b in range(8))) & 1
> 
> As this:
> 
> for c in range(128):
>   bo = [bool(c & 1<<b) for b in range(8)]
>   even_odd = sum(bo) & 1
> 
> 
> Seems to work, is there a better way to do this?

If you want to keep it as a generator that doesn't build a list
in memory, you can use itertools:

import itertools

for c in range(128):
     def _even_odd_func(b): return bool(c & 1<<b)
     even_odd = (sum(itertools.imap(_even_odd_func, xrange(8)))) & 1

The fact that you used range() instead of xrange() indicates that
you may not care about this, though. ;-)
-- 
Michael Hoffman


From dbickett at gmail.com  Fri Feb  4 17:54:21 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Fri, 4 Feb 2005 17:54:21 -0500
Subject: returning True, False or None
In-Reply-To: <pan.2005.02.04.17.42.00.550123@jerf.org>
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com> <raRMd.9382$s16.4267@trndny02>
	<mailman.1922.1107553495.22381.python-list@python.org>
	<pan.2005.02.04.17.42.00.550123@jerf.org>
Message-ID: <1d6cdae305020414547e2b277b@mail.gmail.com>

Jeremy Bowers wrote:
> The defense rests, your honor. :-)

I stand corrected :-) My apologies.

-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From gargonx at gmail.com  Sun Feb 13 16:19:00 2005
From: gargonx at gmail.com (gargonx)
Date: 13 Feb 2005 13:19:00 -0800
Subject: help please
In-Reply-To: <i_ydnb41nJ68IZLfRVn-gw@comcast.com>
References: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
	<TPKdnU2eEu9xPJPfRVn-vg@comcast.com>
	<1108260752.791847.180060@l41g2000cwc.googlegroups.com>
	<Z4ydnbKMDLVvEJLfRVn-hA@comcast.com>
	<1108324679.451793.147890@z14g2000cwz.googlegroups.com>
	<i_ydnb41nJ68IZLfRVn-gw@comcast.com>
Message-ID: <1108329540.239064.144920@f14g2000cwb.googlegroups.com>

Well that seems to work like a champion, but my prob then would be; how
do i get the double character values of ext to turn back to the single
character keys. The reversed (decode if you will). Thanks a lot Steve
this has been a great learning!



From samantha7395 at hotmail.com  Fri Feb 18 13:10:49 2005
From: samantha7395 at hotmail.com (Samantha)
Date: Fri, 18 Feb 2005 10:10:49 -0800
Subject: Probably over my head... Trying to get Font Names
References: <B8KdneiuyLaKoYjfRVn-vQ@adelphia.com>	<mailman.2786.1108689703.22381.python-list@python.org><8oydnSIY04Xby4jfRVn-iA@adelphia.com>
	<mailman.2810.1108749030.22381.python-list@python.org>
Message-ID: <JpydncCe2to2sovfRVn-og@adelphia.com>

Mike,
Not sure why that email bounced.
I downloaded these files:
WinTTX2.0b1.exe
TTFQuery-1.0.0.win32.exe
numarray-1.1.1.win32-py2.4.exe

They all seemed to install. Is WinTTX2.0b1.exe not the fontTools file?
S

"Mike C. Fletcher" <mcfletch at rogers.com> wrote in message 
news:mailman.2810.1108749030.22381.python-list at python.org...
> [Samantha: your email has been bouncing, might want to clear your inbox]
>
> Samantha wrote:
>
>>Thanks Mike. I must have not installed the ttfquery and font tools 
>>correctly. I get an error. This error:
>>
> ...
>
>>ImportError: No module named fontTools
>>
>>Like I said I think I am way in over my short head.
>>S
>>
> Does look as though you missed getting FontTools installed.  You realise
> it's a separate package from TTFQuery, right?
>
>    http://sourceforge.net/projects/fonttools/
>
> You'll have to do the standard:
>
>    python setup.py install
>
> to get it installed on your system.
>
> HTH,
> Mike
>
> ________________________________________________
>  Mike C. Fletcher
>  Designer, VR Plumber, Coder
>  http://www.vrplumber.com
>  http://blog.vrplumber.com
>                              PyCon is coming...
>
> 




From ncoghlan at iinet.net.au  Fri Feb 25 20:34:30 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 26 Feb 2005 11:34:30 +1000
Subject: Code evaluation at function definition execution time (was Re:
 Compile time evaluation (aka eliminating default argument hacks))
In-Reply-To: <ceGdnSLOHIvbfIDfRVn-jg@comcast.com>
References: <mailman.2997.1109243714.22381.python-list@python.org>
	<ceGdnSLOHIvbfIDfRVn-jg@comcast.com>
Message-ID: <421FD226.2060006@iinet.net.au>

Steven Bethard wrote:
> So just to clarify, the issue you're trying to address is when you want 
> early binding like function default arguments get, but you don't want to 
> declare the names as function arguments?

Basically, yeah. Although I later realised I got the name of the feature I want 
wrong - default arguments are evaluated when the def statement is executed, not 
when the code is compiled. So it's a matter of being able to execute some code 
in the functions local namespace at compile time.

I have my doubts about the feasibility of the syntax I posted, too. A version 
which the Python compiler and parser should actually be able to handle would be 
to tack an optional clause on to the front of the function definition statement:

using x, y from:
     # Again, the right syntax for early binding is not clear
     y = x + 2
def f():
     print x, y

(Similar to some of the ideas about statement local namespaces that were kicking 
around a while back, but in this case specific to function definitions)

Anyway, if others agree that the ability to execute a suite at def exeuction 
time to preinitialise a function's locals without resorting to bytecode hacks is 
worth having, finding a decent syntax is the next trick :)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From deetsNOSPAM at web.de  Wed Feb  2 07:59:33 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 02 Feb 2005 13:59:33 +0100
Subject: access to serial port
References: <ctqh3j$nj$1@news.onet.pl>
Message-ID: <36c10bF4v4o0fU1@individual.net>

> How to take access to serial port (rs232) ??
> Is't possible??  Just tell me guy's where I can take o look
> Now I work under Windows XP but finally I need to make script to
> communicate witch
> GSM modem under Linux. There will be a typical AT commands

As always: Google is your friend:

google: python serial port

-- 
Regards,

Diez B. Roggisch


From jason at tishler.net  Thu Feb 10 07:02:50 2005
From: jason at tishler.net (Jason Tishler)
Date: Thu, 10 Feb 2005 07:02:50 -0500
Subject: Building Python with Tcl/Tk on Cygwin_NT-5.1
In-Reply-To: <420A372F.7020800@llnl.gov>
References: <41FF5A67.3090606@llnl.gov> <20050201125129.GA432@tishler.net>
	<41FFA7C9.4070308@llnl.gov> <20050202124435.GA2472@tishler.net>
	<4200D056.4010000@llnl.gov> <4200D22D.9070000@llnl.gov>
	<20050202133005.GE2472@tishler.net> <4208E247.8030706@llnl.gov>
	<20050208175514.GA3788@tishler.net> <420A372F.7020800@llnl.gov>
Message-ID: <20050210120250.GA4084@tishler.net>

Dean,

On Wed, Feb 09, 2005 at 08:15:43AM -0800, Dean N. Williams wrote:
> The "$ TMP=/tmp rebaseall" command worked! Thank you.

You are quite welcome.

> When a new Cygwin is available w/ your changes please let me know...

Sorry, but the above does not scale.  If you subscribe to
cygwin-announce@, then you will be notified when rebase and other Cygwin
packages are released.

Jason

-- 
PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6


From michele.simionato at gmail.com  Mon Feb 28 23:02:59 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 28 Feb 2005 20:02:59 -0800
Subject: python-dev Summary for 2005-01-16 through 2005-01-31
In-Reply-To: <mailman.3160.1109647106.22381.python-list@python.org>
References: <mailman.3160.1109647106.22381.python-list@python.org>
Message-ID: <1109649779.890523.249560@o13g2000cwo.googlegroups.com>

Brett Cannon:
>Lastly, the typical boilerplate for each Summary has now been moved to
the
>bottom.  This was at the request of a regular reader who I would like
to keep
>happy.  =)  It also seems reasonable since once you have read through
it once
>chances are you are not going to read it again so might as well move
it out of
>the way.

+1 for this idea. The summary looks much better now :)
Keep the good work going,

                          Michele Simionato



From http  Tue Feb 15 21:57:47 2005
From: http (Paul Rubin)
Date: 15 Feb 2005 18:57:47 -0800
Subject: low-end persistence strategies?
Message-ID: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>

I've started a few threads before on object persistence in medium to
high end server apps.  This one is about low end apps, for example, a
simple cgi on a personal web site that might get a dozen hits a day.
The idea is you just want to keep a few pieces of data around that the
cgi can update.

Immediately, typical strategies like using a MySQL database become too
big a pain.  Any kind of compiled and installed 3rd party module (e.g.
Metakit) is also too big a pain.  But there still has to be some kind
of concurrency strategy, even if it's something like crude file
locking, or else two people running the cgi simultaneously can wipe
out the data store.  But you don't want crashing the app to leave a
lock around if you can help it.

Anyway, something like dbm or shelve coupled with flock-style file
locking and a version of dbmopen that automatically retries after 1
second if the file is locked would do the job nicely, plus there could
be a cleanup mechanism for detecting stale locks.

Is there a standard approach to something like that, or should I just
code it the obvious way?

Thanks.


From tjreedy at udel.edu  Tue Feb 15 00:37:24 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 15 Feb 2005 00:37:24 -0500
Subject: ValueError: invalid literal for int(): 1.0000000000e+00
References: <4210D979.4000709@ribosome.natur.cuni.cz><cuqo51$e2t$1@sea.gmane.org>
	<cuqp0k$h80$1@sea.gmane.org>
Message-ID: <cus1m2$u5u$1@sea.gmane.org>


"Fredrik Lundh" <fredrik at pythonware.com> wrote in message 
news:cuqp0k$h80$1 at sea.gmane.org...
> Terry Reedy wrote:
>> int(somestring) without a radix argument requires that somestring be an 
>> decimal integer literal and nothing more and nothing else.
>
> but specifying a radix won't help you, though:

My statement as intended to be read, in its totality, is exactly true. 
Remove 'without a radix argument', which is the case under discussion, and 
it becomes false unless 'decimal' is also removed.  But then one must 
specify that the radix match the literal.  If somestring is a non-decimal 
integer literal (something else), then radix is necessary, and not just 
helpful, for correct execution.

>>> int('033')
33
>>> int('033', 8)
27

>>> int('1a3')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: invalid literal for int(): 1a3
>>> int('1a3',16)
419

>>> int('4',3)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: invalid literal for int(): 4

I presume you know this.  I also would have thought that you would know 
better than to think that I am so ignorant and foolish as to think that 
explicitly giving a default parameter value (which is a no-op of no effect) 
would somehow magically fix an invalid input.

The essential point of my post was to clarify for the OP that the reason 
int(1.0) does not work is not because 1.0 is a float literal (which is 
irrelevant to int) but because it is something more (and not 'nothing 
more') than a decimal integer literal.  And so I gave the additional 
example of int(1x) not working.

Knowing that int stops scanning at the first invalid-for-the-radix 'digit' 
explains why it cannot autoconvert a string whose unseen continuation makes 
it float literal.  If one mistakingly assumes that int uses the same lexer 
as Python itself, then one will mistakenly conclude the int will be 
informed that the string constitutes a float literal.  If this were true, 
then expecting the int of the corresponding float value would be 
reasonable.

Even when people know that scanning stops, they often are surprised by the 
exception being raised.  (Indeed, the design could have been otherwise.) 
Clp periodically gets posts like "My string s equal to '123abc' starts with 
a valid decimal integer literal, so why does int(s) fail?" and "You mean I 
really have slice the int away from the rest?"  So I thought it worthwhile 
to reiterate 'nothing more'.

Terry J.Reedy





From aleaxit at yahoo.com  Wed Feb  2 03:33:57 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Wed, 2 Feb 2005 09:33:57 +0100
Subject: How do you do arrays
References: <tbunce-0102051052450001@192.168.1.12>
	<1107284817.848551.79000@c13g2000cwb.googlegroups.com>
	<tbunce-0102051218150001@192.168.1.12>
	<1107292879.436151.47030@c13g2000cwb.googlegroups.com>
Message-ID: <1grcmpa.100fuiwbegwliN%aleaxit@yahoo.com>

Kartic <kartic.krishnamurthy at gmail.com> wrote:
   ...
> I am not sure what book you are using but I don't think it is a very
> good one.

Hmmm, considering he said it's "Python in a Nutshell", I disagree with
you;-).  If he had understood that he probably wanted to use lists, not
arrays, the top paragraph on p. 47 might have helped him -- "Assigning
to an item with an invalid index also raises an exception", and list
comprehensions are on p. 56.

But considering that in the first post he was just trying to assign to
an indexing on a name he had never bound at all, it seems to me that
starting with the Nutshell may simply have been a bit of "running before
you can walk".  The Nutshell does mention that names (variables) spring
into existence when you bind them, which implies they don't exist
previously, and thus you can't perform any operation on them (such as
binding an indexing on them) before you're bound them; but the Nutshell
doesn't extensively belabor the point.

I tried to explain this issue to another poster who recently appeared to
want to turn the Nutshell into a lay version of the Heart Sutra
("Therefore, Shariputra, in Python there are no declarations.  There is
no use strict, no option explicit, no implicit none; no type of a name
and no declaring of a name so that it can't be rebound, no defining of a
name's type and no omitting to define a name's type, ...").  In a quick
reference, there just isn't enough space to repeat every key point, much
less to belabor the implications of each; even if space were free,
having to skip through such repetitions would _waste_ time for the main
target audience -- people who know some Python and want to get reminded
of every detail about a certain subject, or just look up something
specific.  Trying to make a book that's both a hand-holding tutorial
_and_ a quick reference would produce a book that is not very good at
either task, IMHO.


Alex


From abuse at solumslekt.org  Sun Feb 27 13:17:34 2005
From: abuse at solumslekt.org (Leif B. Kristensen)
Date: Sun, 27 Feb 2005 19:17:34 +0100
Subject: Need help running external program
References: <c2nUd.3268977$B07.514197@news.easynews.com>
Message-ID: <29oUd.10465$IW4.263519@news2.e.nsc.no>

I'm using wget from Python to get extactly one line from a reports page.
I made this function that works for me:

def wgetline(exp):  # see Python Cookbook p. 228
    print "Getting result from server ..."
    command = 'wget -q -O - \
        http://www.foobar.com/report.pl\?UserID=xxx\&UserPW=xxx \
        | grep ' + exp
    child = os.popen(command)
    data = child.read()
    return data

I had to escape the ? and & in the url, or the CGI script at the other
end would refuse to cooperate with "Invalid UserID or UserPW".
-- 
Leif Biberg Kristensen


From sjmachin at lexicon.net  Tue Feb  1 15:21:01 2005
From: sjmachin at lexicon.net (John Machin)
Date: 1 Feb 2005 12:21:01 -0800
Subject: Awkwardness of C API for making tuples
In-Reply-To: <dave.opstad-E4D4C4.07281701022005@reader0900.news.uu.net>
References: <dave.opstad-E4D4C4.07281701022005@reader0900.news.uu.net>
Message-ID: <1107289261.185768.116790@f14g2000cwb.googlegroups.com>

Dave Opstad wrote:
> One of the functions in a C extension I'm writing needs to return a
> tuple of integers, where the length of the tuple is only known at
> runtime. I'm currently doing a loop calling PyInt_FromLong to make
the
> integers,

What is the purpose of this first loop?

In what variable-length storage are you storing these (Python) integers
during this first loop? Something you created with (a) PyMem_Malloc (b)
malloc (c) alloca (d) your_own_malloc?

> then PyTuple_New, and finally a loop calling PyTuple_SET_ITEM
> to set the tuple's items. Whew.

Whew indeed.

> Does anyone know of a simpler way? I can't use Py_BuildValue because
I
> don't know at compile-time how many values there are going to be. And

> there doesn't seem to be a PyTuple_FromArray() function.
>
> If I'm overlooking something obvious, please clue me in!

1. Determine the length of the required tuple; this may need a loop,
but only to _count_ the number of C longs that you have.
2. Use PyTuple_New.
3. Loop to fill the tuple, using PyInt_FromLong and PyTuple_SetItem.

Much later, after thoroughly testing your code, gingerly change
PyTuple_SetItem to PyTuple_SET_ITEM. Benchmark the difference. Is it
anywhere near what you saved by cutting out the store_in_temp_array
thing in the first loop?



From mblume at socha.net  Wed Feb  2 12:35:04 2005
From: mblume at socha.net (Martin Blume)
Date: Wed, 2 Feb 2005 18:35:04 +0100
Subject: continuous plotting with Tkinter
Message-ID: <42010f48$0$3408$5402220f@news.sunrise.ch>

I have a number-crunching application that spits out 
a lot of numbers. Now I'd like to pipe this into a python
app and plot them using Tkinter, such as:
$ number_cruncher | myplot.py
But with Tkinter once  I call Tkinter's mainloop() I
give up my control of the app and I can't continue to
read in data from stdin.  Or can I? If so, how?

Regards
Martin





From osv at javad.ru  Wed Feb  9 13:01:52 2005
From: osv at javad.ru (Sergei Organov)
Date: 09 Feb 2005 21:01:52 +0300
Subject: Python and version control
References: <XNrOd.1657$Mw3.72@amstwist00>
Message-ID: <cudj6o$s6p$1@n6.co.ru>

Carl <phleum_nospam at chello.se> writes:

[...]
> I am a keen user of Emacs, but version control, which is very simple
> when you are in a Linux environment, for example, is not a
> straightforward in Windows.

Emacs + CVS (or CVSNT) should work just fine in Windows either.

-- 
Sergei.


From maxm at mxm.dk  Fri Feb 11 08:44:16 2005
From: maxm at mxm.dk (Max M)
Date: Fri, 11 Feb 2005 14:44:16 +0100
Subject: Big development in the GUI realm
In-Reply-To: <umzubw8xg.fsf@vh-s.de>
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<4207c8db$0$21623$a1866201@visi.com>
	<cub12p$pke$1@achot.icm.edu.pl>
	<36sip2F56jjmaU1@individual.net> <umzubw8xg.fsf@vh-s.de>
Message-ID: <420cb65f$0$238$edfadb0f@dread12.news.tele.dk>

Josef Dalcolmo wrote:
> You can distribute GPL'ed code in binary form, you just have to make
> the sources available as well.  And, yes I would use this as a test:
> if your program needs gpl-ed code for some of it's functionality, you
> have to licence your program according to the GPL - unless you
> distribute the GPL'ed parts separately and your program is still
> basically functioning without the GPL'ed code.
> 
> Besides this, why not putting your code under the GPL? 


GPL is not suitable for all kinds of software. It's nice if you are 
sharing code with others, but if you are developing something like a 
desktop application that you want to sell for money, using the GPL is a 
bad idea.


-- 

hilsen/regards Max M, Denmark

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


From administrata at hotmail.com  Fri Feb 11 06:29:46 2005
From: administrata at hotmail.com (administrata)
Date: 11 Feb 2005 03:29:46 -0800
Subject: [NooB] Using Escape Sesquences with Strings...
Message-ID: <614c778e.0502110329.2d4e7e73@posting.google.com>

Hello! :)
I've reading 'Python Programmin for the Absolute beginner'.
I got questions which is...

print "\t - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "

rock = """
Igneous          Sedimentary          Metamorphic

Lava             Grains               Marble
Ramdom crystals  Layer                Bands
Granite          Salt                 Schist
Intrusive        Weathering           Heat + Pressure
                 Deposition           Change"""
print \trock

print "\t - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "

error occurs!

I don't know how to \t The variable.

Help!


From mefjr75 at hotmail.com  Fri Feb 11 21:30:57 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 11 Feb 2005 18:30:57 -0800
Subject: listerator clonage
References: <mailman.2429.1108173429.22381.python-list@python.org>
Message-ID: <1108175457.435899.82540@o13g2000cwo.googlegroups.com>

Cyril BAZIN wrote:
> Hello,
>
> I want to build a function which return values which appear two or
> more times in a list:
>
> So, I decided to write a little example which doesn't work:
> #l = [1, 7, 3, 4, 3, 2, 1]
> #i = iter(l)
> #for x in i:
> #    j = iter(i)
> #    for y in j:
> #        if x == y:
> #            print x

Py> i = [1,2,5,4,3,3,6,8,2,2,6]
Py> o = []
Py> for item in i:
...     if i.count(item) > 1 and item not in o:
...         o.append(item)
...
Py> print o
[2, 3, 6]

> In thinked that the instruction 'j= iter(i)' create a new iterator
'j'
> based on 'i' (some kind of clone). I wrote this little test which
show
> that 'j = iter(i)' is the same as 'j = i' (that makes me sad):
>
> #l = [1, 7, 3, 4, 2]
> #i = iter(l)
> #j = iter(i)
> #k = i
> #i, j, k
> (<listiterator object at 0x02167B50>, <listiterator object at
> 0x02167B50>, <listiterator object at 0x02167B50>)
Generally speaking Python sequence objects are iterable already no need
to cast them like java.
And yes iter() does create an iterator object.
Py> i = [1,2,5,4,3,3,6,8,2,2,6]
Py> e = iter(i)
Py> e
<stackless.iterator object at 0x010779E0>
Py> e.next()
1
Py> e.next()
2
Py> e.next()
5
Py> for item in e:
...     print item
...
4
3
3
6
8
2
2
6
But if you want a copy of a list then you can do it many other ways.
Py> i = [1,2,5,4,3,3,6,8,2,2,6]
Py> l = list(i)
Py>l
[1, 2, 5, 4, 3, 3, 6, 8, 2, 2, 6]
Py>i
[1, 2, 5, 4, 3, 3, 6, 8, 2, 2, 6]
Or,
Py> i = [1,2,5,4,3,3,6,8,2,2,6]
Py> l = i[:]
Py>l
[1, 2, 5, 4, 3, 3, 6, 8, 2, 2, 6]
Py>i
[1, 2, 5, 4, 3, 3, 6, 8, 2, 2, 6]
or you can even use copy,
Py> import copy
Py> i = [1,2,5,4,3,3,6,8,2,2,6]
Py> l = copy.copy(i)
Py> l
[1, 2, 5, 4, 3, 3, 6, 8, 2, 2, 6]

> Just in order to test, I wrote these little test:
> #l = [1, 7, 3, 4, 2]
> #i = iter(l)
> #import pickle
> #j = pickle.loads(pickle.dumps(i))
> Traceback (most recent call last):
>   File "<input>", line 1, in ?
>   File "C:\Python24\lib\pickle.py", line 1386, in dumps
>     Pickler(file, protocol, bin).dump(obj)
>   File "C:\Python24\lib\pickle.py", line 231, in dump
>     self.save(obj)
>   File "C:\Python24\lib\pickle.py", line 313, in save
>     rv = reduce(self.proto)
>   File "C:\Python24\lib\copy_reg.py", line 69, in _reduce_ex
>     raise TypeError, "can't pickle %s objects" % base.__name__
> TypeError: can't pickle listiterator objects
>
> #import copy
> #j = copy.copy(i)
> Traceback (most recent call last):
>   File "<input>", line 1, in ?
>   File "C:\Python24\lib\copy.py", line 95, in copy
>     return _reconstruct(x, rv, 0)
>   File "C:\Python24\lib\copy.py", line 320, in _reconstruct
>     y = callable(*args)
>   File "C:\Python24\lib\copy_reg.py", line 92, in __newobj__
>     return cls.__new__(cls, *args)
> TypeError: object.__new__(listiterator) is not safe, use
listiterator.__new__()
>
> So, I would like to know if there is a way to 'clone' a
'listiterator'
> object. I know that is possible in Java for example...
Just pickle the list not the iterator.

> If it is impossible, have you better ideas to find duplicate entries
> in a list...
See code example above.
> Thanks,
> 
> Cyril
Hth, 
M.E.Farmer



From irmen.NOSPAM at xs4all.nl  Mon Feb 14 20:05:06 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Tue, 15 Feb 2005 02:05:06 +0100
Subject: is there a safe marshaler?
In-Reply-To: <7xbramejkc.fsf@ruckus.brouhaha.com>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<1108051828.483222.62670@z14g2000cwz.googlegroups.com>
	<7xmzu6q4cv.fsf@ruckus.brouhaha.com>
	<4211185b$0$28982$e4fe514c@news.xs4all.nl>
	<7xbramzt1c.fsf@ruckus.brouhaha.com>
	<42112b1e$0$28978$e4fe514c@news.xs4all.nl>
	<7xacq6sqej.fsf@ruckus.brouhaha.com>
	<421130ae$0$28984$e4fe514c@news.xs4all.nl>
	<7x3bvyiuin.fsf@ruckus.brouhaha.com>
	<42113b3b$0$28991$e4fe514c@news.xs4all.nl>
	<7xbramejkc.fsf@ruckus.brouhaha.com>
Message-ID: <42114a75$0$28989$e4fe514c@news.xs4all.nl>

Paul Rubin wrote:

> Hmm, you also want a random blob in each packet (including the session
> start) included in the authentication of the next packet, so the
> attacker can't cut and paste messages from old sessions into the
> current ones.  You know, by the time you're through designing this you
> may be better off just using SSL and getting it over with.  It's very
> easy to make mistakes designing these types of protocols.  There are
> some reasonable examples in "Applied Cryptography", but maybe you
> don't want to deal with this stuff.

Heh, indeed I rather don't.
I know a bit about this stuff, but not nearly enough to come
up with a water tight design by myself, so it's much easier
and safer to rely on trusted work by others.


>>I label things like SOAP and XML-RPC much different than RMI or Pyro,
>>because they (SOAP) are much more "distant" from the actual
>>programming language and environment beneath them. I don't know if
>>this is good thinking or not but the fact that RMI and Pyro expose
>>language features directly, and SOAP not, makes that I reason about them
>>differently.
> 
> 
> Hmm, I sort of understand this, but not completely.  Does DCOM or .NET
> expose language features directly?

.NET: no idea
DCOM: as it is based on DCE/RPC, I would say: no. There's this MIDL
thing sitting in between and stuff like that. There's no such thing
as a specific class id and/or method name and/or parameter list that
directly maps onto an object.method in the programming environment.

I must confess, this stuff is getting all rather messy and probably not
worth to try to make such a distinction between all the RPC protocols :-)

> I've been meaning to look at Pyro and will certainly let you know if I
> spot any problems, but of course there might be some that I don't find.

I would appreciate it.


>>Furthermore there are practical issues such as having to
>>open a buch of new ports in your firewall. In my experience
>>this is very hard to get done, sadly, in contrast to just
>>exposing a "web-service" (in whatever form) on port 80 HTTP.
> 
> 
> Yes, though RMI requires the same.

Precisely. There is this tunneling thing, but I never got it to work.
In the end, using a SSH tunnel may prove to be even easier :-D
(just let sshd listen on port 80 and you're set)


--Irmen



From fuzzyman at gmail.com  Tue Feb 22 08:21:52 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 22 Feb 2005 05:21:52 -0800
Subject: UTF-8 / German,
	Scandinavian letters - is it really this difficult?? Linux &
	Windows XP
In-Reply-To: <cve1vh$c37$1@phys-news1.kolumbus.fi>
References: <cve1vh$c37$1@phys-news1.kolumbus.fi>
Message-ID: <1109078512.094288.316030@z14g2000cwz.googlegroups.com>


Mike Dee wrote:
> A very very basic UTF-8 question that's driving me nuts:
>
> If I have this in the beginning of my Python script in Linux:
>
> #!/usr/bin/env python
> # -*- coding: UTF-8 -*-
>
> should I - or should I not - be able to use non-ASCII characters
> in strings and in Tk GUI button labels and GUI window titles and in
> raw_input data without Python returning wrong case in manipulated
> strings and/or gibberished characters in Tk GUI title?
>
>
>
[snip..]

Yet another reply... :-)

My understanding is that the encoding declaration (as above) only
applies to the source code - and will not make your string literals
into unicode objects, nor set the default encoding for the interpreter.


This will mean string literals in your source code will be encoded as
UTF8 - if you handle them with normal string operations you might get
funny results.


Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From duncan.booth at invalid.invalid  Thu Feb 10 11:13:00 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 10 Feb 2005 16:13:00 GMT
Subject: goto, cls, wait  commands
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
Message-ID: <Xns95F9A4E32D0CBduncanrcpcouk@127.0.0.1>

BOOGIEMAN wrote:

> I've just finished reading Python turtorial for non-programmers
> and I haven't found there anything about some usefull commands I used
> in QBasic. First of all, what's Python command equivalent to QBasic's
> "goto" ?

There isn't one. Why do you think you need this?

> Secondly, how do I clear screen (cls) from text and other
> content ?

That depends on your computer, and how you are running your program.
One way which *might* work is:

   import os
   os.system("cls")

> And last, how do I put program to wait certain amount of
> seconds ? If I remeber correctly I used to type "Wait 10" and QBasic
> waits 10 seconds before proceeding to next command.

   import time
   time.sleep(10)


From danperl at rogers.com  Sun Feb  6 01:34:21 2005
From: danperl at rogers.com (Dan Perl)
Date: Sun, 6 Feb 2005 01:34:21 -0500
Subject: sos!
References: <6d2e4eef.0502050342.d8744cb@posting.google.com>
	<StKdnVdY3-KK2pjfRVn-uw@rogers.com>
	<1107643244.510478.261130@o13g2000cwo.googlegroups.com>
	<NIWdne_Ope4t0JjfRVn-hw@rogers.com>
	<6d2e4eef.0502052203.14ed0068@posting.google.com>
Message-ID: <G-KdnZ3X26HzJ5jfRVn-oA@rogers.com>


"jordan2856977" <jordan2856977 at 163.com> wrote in message 
news:6d2e4eef.0502052203.14ed0068 at posting.google.com...
> "Dan Perl" <danperl at rogers.com> wrote in message 
> news:<NIWdne_Ope4t0JjfRVn-hw at rogers.com>...
>> <mensanator at aol.com> wrote in message
>> news:1107643244.510478.261130 at o13g2000cwo.googlegroups.com...
>> >
>> > Dan Perl wrote:
>> >> [...]
>> > Aren't you in the wrong newsgroup? :-)
>>
>> Aren't you funny?
> i think i have solve
> the problem thank you

Jordan, neither my posting nor the posting I followed up to were referring 
to you.  mensanator was trying to be funny about my last name and I followed 
up with a comeback. 




From john_sips_teaz at yahooz.com  Mon Feb  7 23:01:18 2005
From: john_sips_teaz at yahooz.com (John M. Gabriele)
Date: Mon, 07 Feb 2005 23:01:18 -0500
Subject: Is Python as capable as Perl for sysadmin work?
Message-ID: <pan.2005.02.08.04.01.16.605059@yahooz.com>

I recently posted this sort of question to the c.l.p.m but
didn't get much of a response. I know a little Perl and a
little Python, but master neither at the moment.

I see that Python is a general purpose OO programming language
that finds use among some system administrators, but my guess
is that Perl is still more common in that area than Python.

For sysadmin-related tasks, is Python as useful as Perl, or
does it get clumsy when often dealing with the stuff admins
deal with on a regular basis?

At some point during some dingy job in the back boiler room
of Unix, would you find yourself saying, "geez, I'd wish I
started this with Perl -- Python just isn't cutting it." ?

Thanks,
---J

-- 
--- if replying via email, remove zees ---




From josh at yucs.org  Mon Feb  7 11:24:20 2005
From: josh at yucs.org (josh at yucs.org)
Date: Mon, 7 Feb 2005 11:24:20 -0500
Subject: time + timedelta
Message-ID: <20050207162420.GA19677@yucs.org>

datetime.time should support timedelta arithmetic, patch attached.

Times greater than 24 hours should not raise an exception, but always
wrap around. Any other behavior is too surprising. (People expect to be
able to call you up at 11pm, and say "meet me in two hours" (if you're a
night person)).

Clock time is cyclical. Though it's convenient to assign hours numbers,
an unqualified hour 23.5 is not naturally "greater than" hour 0.5.
(Though I'm not suggesting that we break this.)

The special meaning for hour 0 is only relevant for datetimes. When
dates are not involved, it shouldn't get any special treatment.
When dates are involved, it's easy to "assert datetime1.date() ==
datetime2.date()"

If this change is made however, maybe datetime.timedelta(hours=-1)
should no longer normalize to datetime.timedelta(-1, 82800)



From aleaxit at yahoo.com  Tue Feb  8 03:24:09 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Tue, 8 Feb 2005 09:24:09 +0100
Subject: Confused with methods
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>
	<slrnd0enor.26q.apardon@rcpc42.vub.ac.be>
	<1grmd4z.1tlm4e61650vedN%aleaxit@yahoo.com>
	<slrnd0f07t.26q.apardon@rcpc42.vub.ac.be>
	<1grmg8s.17t7tj4180jdj6N%aleaxit@yahoo.com>
	<mailman.2075.1107792148.22381.python-list@python.org>
	<INednSf1ioDSOprfRVn-jg@comcast.com>
	<mailman.2115.1107815482.22381.python-list@python.org>
	<mailman.2128.1107820469.22381.python-list@python.org>
Message-ID: <1grnq8x.eok1jw1l4lweeN%aleaxit@yahoo.com>

jfj <jfj at freemail.gr> wrote:

> I just realized that I'm trolling.

I'm glad you're retracting your earlier assertion that "There is no
trolling involved here".  Everybody can err, but to admit and apologize
takes character: may I offer my warmest handshake.

Back when I was a Python newbie (and identified as such even in the
Subject of my early posts) I had my ideas about how Python should
change, too: it should grow a '__contains__' special method to let a
container optimize membership tests (the `in' operator); it should have
a specialized iterator protocol, rather than always relying on indexing
for iteration; it should be possible to subclass builtin types, e.g.
dictionary; ... you can read all about it on google, including my
request to """Please consider "IMHO"'s to be liberally inserted in what
follows, of course!-)."""

It turned out that __contains__ was already in the plans (which I did
not know about): I had even guessed the *name*!  The iterator protocol
and subclassing builtin types took a bit longer to appear (and the
eventual name was __iter__ while my original idea was __enum__; and it's
still not fully possible insert a subclassed dict anywhere a dict may be
used) but eventually they did.

And yet for all of this I ended up in a flamewar with the timbot
anyway... it solved itself and we made friends, but still, I'm quite
familiar with the pickles a newbie can get into;-).


Alex


From ilias at lazaridis.com  Mon Feb 14 06:46:26 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Mon, 14 Feb 2005 13:46:26 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2520.1108379101.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr>	<cup249$svu$1@gemini.csx.cam.ac.uk><cupqb6$1oi$1@usenet.otenet.gr>	<cups17$kbs$1@gemini.csx.cam.ac.uk>
	<cupvmh$os2$1@usenet.otenet.gr>
	<mailman.2520.1108379101.22381.python-list@python.org>
Message-ID: <cuq32h$a3e$1@usenet.otenet.gr>

Fredrik Lundh wrote:
> Ilias Lazaridis wrote
> 
>>The idea that the Python Foundation cares about user needs would affect that.
> 
> please let the users speak for themselves.

I have.

I've review several threads,publications, actions etc., that show that 
the users have this need.

please review the initial thread with care, i've pointed to some 
documents/thread.

.

-- 
http://lazaridis.com


From dial#####$$NOSPAM##$#$## at gmail.com  Tue Feb  8 07:44:06 2005
From: dial#####$$NOSPAM##$#$## at gmail.com (Valentino Volonghi aka Dialtone)
Date: Tue, 8 Feb 2005 13:44:06 +0100
Subject: re-entrancy question
References: <mailman.2160.1107860625.22381.python-list@python.org>
Message-ID: <1gro31a.cnlxbq4rze4eN%dial#####$$NOSPAM##$#$##@gmail.com>

Tim Golden <tim.golden at viacom-outdoor.co.uk> wrote:

> No doubt there are more pertinent answers, but unless this is
> a learning exercise, you'd be better off investigating Pyro:
> http://pyro.sf.net

AFAIK pyro is just a RPC implementation for python whereas Twisted is a
completely different beast that happens to have its own implementation
of RPC.

How would the OP be better investigating something different, that he
probably doesn't even need?

Your comment would be pertinent only if it considered Perspective Broker
against pyro, and I admit I don't know how they compare.

-- 
Valentino Volonghi aka Dialtone
Now Running MacOSX 10.3.7
Blog: http://vvolonghi.blogspot.com
http://weever.berlios.de


From doodle4 at gmail.com  Mon Feb 14 23:15:52 2005
From: doodle4 at gmail.com (doodle4 at gmail.com)
Date: 14 Feb 2005 20:15:52 -0800
Subject: newbie question convert C to python
Message-ID: <1108440952.526232.234130@c13g2000cwb.googlegroups.com>

How do i handle this piece of code in python:

# define vZero 15
# define vOne  20

unsigned int vTable[Zero][One]

if(vGroup[vZero][vOne] == 0)
    {
         vGroup[vZero][vOne]--
         .....
         .....
    }

Thanks,
-d4



From fperez.net at gmail.com  Tue Feb 15 04:01:46 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Tue, 15 Feb 2005 02:01:46 -0700
Subject: [ANN] IPython 0.6.11 is out.
Message-ID: <cusdm5$ok3$1@sea.gmane.org>

Hi all,

I'm glad to announce the release of IPython 0.6.11.  IPython's homepage is at:

http://ipython.scipy.org

and downloads are at:

http://ipython.scipy.org/dist

I've provided RPMs (for Python 2.3 and 2.4, built under Fedora Core 3), plus
source downloads (.tar.gz).  We now also have a native win32 installer which
should work correctly for both Python 2.3 and 2.4.

NOTE: Win32 users who grabbed the 0.6.11 which I put in testing last week
should still update, since today's release is actually quite different, and it
has a few win32-specific fixes (plus the big new backgrounding feature).

Debian, Fink and BSD packages for this version should be coming soon, as the
respective maintainers (many thanks to Jack Moffit, Andrea Riciputi and Dryice
Liu) have the time to follow their packaging procedures.

Many thanks to Enthought for their continued hosting support for IPython, and
to all the users who contributed ideas, fixes and reports.


WHAT is IPython?
----------------

1. An interactive shell superior to Python's default. IPython has many
features for object introspection, system shell access, and its own special
command system for adding functionality when working interactively.

2. An embeddable, ready to use interpreter for your own programs. IPython can
be started with a single call from inside another program, providing access to
the current namespace.

3. A flexible framework which can be used as the base environment for other
systems with Python as the underlying language.


Release notes
-------------

As always, the NEWS file can be found at http://ipython.scipy.org/NEWS, and
the full ChangeLog at http://ipython.scipy.org/ChangeLog.

* A new subsystem has been added to IPython for background execution (in a
separate thread) of commands and function calls.  This system is by no means
perfect, and some of its limitations are unavoidable due to the nature of
python threads.  But it can still be useful to put in the background
long-running commands and regain control of the prompt to continue doing other
things.  The new jobs builtin has extensive docstrings, and the new %bg magic
complements it.  Please type %bg? and jobs? for further details.

The user-level API of this system is brand new, so I am very open to
suggestions and comments.  While a threads-based model has limitations, this
is also a testbed for future integration into ipython of other models of
background execution, including parallel processing both on local
(multiprocessor/multicore) machines and on remote clusters.  So please
consider this an exploratory feature where we can test these ideas and better
understand what works and what doesn't.

This system was inspired by discussions with Brian Granger <bgranger at scu.edu>
and the BackgroundCommand class described in the book Python Scripting for
Computational Science, by H. P. Langtangen:

http://folk.uio.no/hpl/scripting

(although ultimately no code from this text was used, as IPython's system is a
separate implementation).

* Tab completion now shows all possible completions, both for python names and
files/directories.  This is different from the old behavior, but in practice
much more convenient (thanks to John Hunter for the request).

* The readline_omit__names rc option now allows you to fine-tune the behavior
of tab-completion.  You can filter out names starting with one underscore or
two separately.  If set to 1, you only filter double-underscore names (like
before), but if set to 2, you also filter out single-underscore names.  Thanks
to a patch by Brian Wong <BrianWong at AirgoNetworks.Com>.

* Improvements for win32 users continue.  The installer bug for 2.4 has been
fixed by the Python team, so the provided binary installer should now complete
without problems (let me know otherwise).  Just in case, a manual
post-installer for win32 still ships with the .tar.gz sources, though it
should never be needed.

Gary Bishop also squashed a number of readline bugs, so if you update to his
most recent release from

http://sourceforge.net/projects/uncpythontools

you should benefit from fully correct source highlighting under Win32.  Thanks
to Vivian De Smedt, autoindent now also works under win32.

As far as I know, at this point (for the first time ever, fingers crossed...),
all of ipython's features exist in a win32 environment.  Many thanks to all
the patient users who have helped with this task.

I would appreciate reports of any problems from Win32 users.

* Fix issue28 in the bug tracker by disabling the startup output traps.  This
subsystem, while nice when it works (it organizes startup error messages
neatly) can lead to mysterious, impossible to debug problems during
initialization.

* Fix 'ed -p' not working when the previous call produced a syntax error.

* Fix crash when inspecting classes without constructor.

* Other small fixes and cleanups.


Enjoy, and as usual please report any problems.

Regards,

Fernando.



From sjmachin at lexicon.net  Mon Feb 21 18:01:05 2005
From: sjmachin at lexicon.net (John Machin)
Date: 21 Feb 2005 15:01:05 -0800
Subject: Tuple index
In-Reply-To: <cvdnn3$eao$1@news.netins.net>
References: <cvbcc6$b5f$1@news.netins.net>
	<1108951559.490554.305310@l41g2000cwc.googlegroups.com>
	<cvdian$ejs$1@news.netins.net> <zvOdneQkB6SyzoffRVn-jw@comcast.com>
	<cvdll3$f4u$1@news.netins.net>
	<1109023881.232830.183100@o13g2000cwo.googlegroups.com>
	<cvdnn3$eao$1@news.netins.net>
Message-ID: <1109026865.523218.214010@g14g2000cwa.googlegroups.com>


Steve M wrote:
> John Machin wrote:
>
> >
> > Steve M wrote:
> >> I'm actually doing this as part of an exercise from a book. What
the
> > program
> >> is supposed to do is be a word guessing game. The program
automaticly
> >> randomly selects a word from a tuple.
> >
> > Care to tell us which book is using a tuple for this, but hasn't
got to
> > lists yet?
> >
> > Cheers,
> > John
>
> Python Programming for the absoulte beginner by Michael Dawson

In a review I found on the web:
http://www.skattabrain.com/css-books-plain/1592000738.html
"Dawson will take you by the hand and lead you down the garden path."

Malapropism? Intentional humour?



From enleverlesO.OmcO at OmclaveauO.com  Sat Feb  5 06:07:07 2005
From: enleverlesO.OmcO at OmclaveauO.com (Do Re Mi chel La Si Do)
Date: Sat, 5 Feb 2005 12:07:07 +0100
Subject: Python Processes for Win32
References: <1107596511.843557.98180@z14g2000cwz.googlegroups.com>
Message-ID: <4204b8f0$0$10485$8fcfb975@news.wanadoo.fr>

Hi !

Look for "service" in PyWin


@-salutations
-- 
Michel Claveau





From mahs at telcopartners.com  Sat Feb 12 19:54:03 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sat, 12 Feb 2005 16:54:03 -0800
Subject: Hack with os.walk()
In-Reply-To: <1f7befae05021216052c742a14@mail.gmail.com>
References: <200502120000.12086.frans.englich@telia.com>
	<1f7befae05021216052c742a14@mail.gmail.com>
Message-ID: <cum8a2$qf9$1@sea.gmane.org>

Tim Peters wrote:
> [Frans Englich]
> ...
> 
[snip]
> 
> class HasPath:
>     def __init__(self, path):
>         self.path = path
> 
>     def __lt__(self, other):
>         return self.path < other.path
> 
> class Directory(HasPath):
>     def __init__(self, path):
>         HasPath.__init__(self, path)
>         self.files = [] # list of File objects
>         self.subdirs =  [] # list of sub-Directory objects
> 
> class File(HasPath):
>     pass
> 
[snip]
> 
> def build_tree(path, Directory=Directory, File=File):
>     top = Directory(path)
>     path2dir = {path: top}
>     for root, dirs, files in os.walk(path):
>         dirobj = path2dir[root]
>         for name in dirs:
>             subdirobj = Directory(os.path.join(root, name))
>             path2dir[subdirobj.path] = subdirobj
>             dirobj.subdirs.append(subdirobj)
>         for name in files:
>             dirobj.files.append(File(os.path.join(root, name)))
>     return top
> 
> That looks short and sweet to me.  It could be made shorter, but not
> without losing clarity to my eyes.

The aforementioned path class makes this even easier.  No need to build the tree 
- that is done automatically by the path constuctor:

ListingDirectory can then inherit from path.path with few changes:

from path import path

libpath = r"C:\Python24\Lib"

class ListingDirectory(path):
     # Display directory tree as a tree, with 4-space indents.
     # Files listed before subdirectories, both in alphabetical order.
     # Full path displayed for topmost directory, base names for all
     # other entries.  Directories listed with trailing os.sep.
     def display(self, level=0):

         name = self.abspath()   # path method
         if level:
             name = self.basename() # path method
         print "%s%s%s" % (' ' * level, name, os.sep)
         for f in self.files():
             print "%s%s" % (' ' * (level + 4), f.basename())  path method
         for d in self.dirs():  # path.dirs returns an iterator over path objects
             ListingDirectory(d).display(level + 4)

mytree = ListingDirectory(libpath)
mytree.display()

[snip about 15000 lines...]

Michael



From cedric.dev at tele2.fr  Wed Feb  2 04:40:07 2005
From: cedric.dev at tele2.fr (cedric paille)
Date: Wed, 2 Feb 2005 09:40:07 -0000
Subject: Reference count question
Message-ID: <003401c5090b$2f0f4fb0$90010d0a@umanis.com>

Hi all, i'm working on an app that embed python 2.3 with Gnu/Linux, and i'd like to have some precisions:

I'm making python's modules to extend my application's functions with a built in script editor.
At now all works very well, but i'd like to know if i'm not forgetting some references inc/dec....

Here is a portion of my code:

static PyObject *
Scene_GetNodeGraph(PyObject *self, PyObject *args)
{
  NodeGraph* Ng = NodeGraph::GetInstance();
  std::vector<String> NodG;
  Ng->GetNodeGraph(NodG);
  PyObject* List = PyList_New(NodG.size());
  PyObject* Str = NULL;
  std::vector<String>::iterator it = NodG.begin();
  int i = 0;
  for (;it != NodG.end();it++)
  {
    Str = PyString_FromString(it->AsChar());
    PyList_SetItem(List,i,Str);
     i++;
  }
  return List;
}

Can someone take a look at this and tell me if i must add some inc/decref ?

Thanks.
-------------- next part --------------
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From belred at gmail.com  Wed Feb  2 01:48:05 2005
From: belred at gmail.com (Bryan)
Date: Tue, 01 Feb 2005 22:48:05 -0800
Subject: Where are list methods documented?
In-Reply-To: <16896.17539.299517.40541@montanaro.dyndns.org>
References: <41ffba7d$0$15879$a1866201@visi.com>
	<16896.17539.299517.40541@montanaro.dyndns.org>
Message-ID: <ctpt2e$5it$1@sea.gmane.org>

Skip Montanaro wrote:
>     Grant> where are the methods of basic types documented?  
> 
> The other day I suggested the most valuable doc page to bookmark is the
> global module index.  Here's a demonstration.  Start at:
> 
>     http://www.python.org/dev/doc/devel/modindex.html
> 
> Click "__builtin__", which takes you to
> 
>     http://www.python.org/dev/doc/devel/lib/module-builtin.html
> 
> Click the "2" in "See Chapter 2", which takes you to
> 
>     http://www.python.org/dev/doc/devel/lib/builtin.html#builtin
> 
> Scroll down to section 2.3.6 and choose your sequence poison.
> 
> I use the dev docs instead of the latest release docs because I generally
> run from CVS on my system, however in this case it has the added advantage
> that the link on the __builtin__ page is more useful.
> 
> Skip
> 
> 
>     


wow, that's pretty obscure.  i barely even saw the link to chapter 2.  i always 
the modules index page open and i always wished there was an explicit link to 
lists, tuples, dict, set, etc.  maybe these explicit links could be at the top 
of the __builtins__ page.

bryan



From shoot at the.moon  Mon Feb  7 16:24:12 2005
From: shoot at the.moon (Steve Horsley)
Date: Mon, 07 Feb 2005 21:24:12 +0000
Subject: python under java2
In-Reply-To: <4206b2a0$0$6301$5fc30a8@news.tiscali.it>
References: <4206b2a0$0$6301$5fc30a8@news.tiscali.it>
Message-ID: <cu8m95$gv6$1@news.freedom2surf.net>

motokoit wrote:
> For some reason i need to start a python script from inside a java code. The
> main part of the code is something like this
> 
> try{
>    Runtime rt = Runtime.getRuntime();
>    System.out.println("start");
>    Process proc =  Runtime.getRuntime().exec("python myscript.py");
>    proc.waitFor();
>    System.out.println("end");
> } catch (Exception e){
>    e.printStackTrace();
> }
> 
> and so worked for months....but since some days ago the same instruction
> does not work but execute without any exception, that is print either
> "start" and "end"; the strangest thing happen when I call just
> 
> Process proc =  Runtime.getRuntime().exec("python myscript.py");
> 
> the execution looks like stalled and does not comes to an end printing just
> the "start".
> 
> Some suggestion?
> My machine is a Linux Mandrake64 10.1
> 
I think this is probably really a java question. I suspect that your
python script is issuing too much output either on stdout or stderr,
and because you are not reading these streams, the process is blocking
because the output buffers are full. If this is the case, you need to 
get your java program to read the streams (Process.getInputStream()
and Process.getErrorStream()), which is something you should be doing
anyway. In order to read both streams, you either need two threads, or
to use java.nio and select.

A short term fix might be to run theh python script by hand and see if
it throws out a long stack trace (this could block an unread error stream).

HTH
Steve


From mefjr75 at hotmail.com  Sat Feb  5 02:27:40 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 4 Feb 2005 23:27:40 -0800
Subject: who can tell me BASICS of Python
In-Reply-To: <1107588047.020906.321750@g14g2000cwa.googlegroups.com>
References: <1107588047.020906.321750@g14g2000cwa.googlegroups.com>
Message-ID: <1107588460.116716.324480@o13g2000cwo.googlegroups.com>

I guess it depends :)
Let us know what works for you.

M.E.Farmer



From steven.bethard at gmail.com  Fri Feb  4 18:00:46 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 04 Feb 2005 16:00:46 -0700
Subject: string issue
In-Reply-To: <cu0ln1$o5t$1@solaris.cc.vt.edu>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
	<36QMd.103084$Jk5.36127@lakeread01> <87lla4w0av.fsf@pobox.com>
	<cu0ln1$o5t$1@solaris.cc.vt.edu>
Message-ID: <BIKdnV8t8O8GY57fRVn-og@comcast.com>

rbt wrote:
> John J. Lee wrote:
> 
>> Steve Holden <steve at holdenweb.com> writes:
>> [...]
>>
>>> You are modifying the list as you iterate over it. Instead, iterate
>>> over a copy by using:
>>>
>>> for ip in ips[:]:
>>>   ...
>>
>> Just to help popularise the alternative idiom, which IMO is
>> significantly less cryptic (sane constructors of mutable objects
>> almost always make a copy, and list is no exception: it's guaranteed
>> to do so):
>>
>> for ip in list(ips):
>>    ...
>>
>> Works back to at least Python 1.5.2.
> 
> I don't know that that approach is less cryptic. ips is already a 
> list... it looks cryptic to make it a list again, doesn't it? IMO, the 
> two are equally cryptic. The epitome of clarity would be copy(ips)... 
> now *that* makes sense, of course, ips[:] or list(ips) work equally well 
> to the programmer who has learned them.


This probably seems cryptic until you realize that almost all builtin 
mutable objects work this way:

py> def copy(obj):
...     return type(obj)(obj)
...

py> lst = range(5)
py> copy(lst)
[0, 1, 2, 3, 4]
py> lst is copy(lst)
False

py> dct = dict(a=1, b=2)
py> copy(dct)
{'a': 1, 'b': 2}
py> dct is copy(dct)
False

py> st = set(range(5))
py> copy(st)
set([0, 1, 2, 3, 4])
py> st is copy(st)
False

py> from collections import deque
py> dq = deque(range(5))
py> copy(dq)
deque([0, 1, 2, 3, 4])
py> dq is copy(dq)
False

If you're uncomfortable with this form, I'd suggest spending some time 
playing around with it -- Python is pretty consistent about this usage 
of a builtin type.

Steve


From mechanicalamit at yahoo.co.uk  Mon Feb 14 12:11:22 2005
From: mechanicalamit at yahoo.co.uk (Amit Dhingra)
Date: Mon, 14 Feb 2005 12:11:22 -0500
Subject: [newbie] - How to remain at prompt after script execution?
Message-ID: <DZ4Qd.1411$UN1.71@news.itd.umich.edu>

I am a total newbie learning the very basics
I would like to excute a script and upon completion, how can I just a python
prompt with the functions and variables already defined.

I know you can do this in the window gui(IDLE). I was wondering if this can
be done in POSIX systems as well.




From samantha7395 at hotmail.com  Fri Feb 25 01:25:25 2005
From: samantha7395 at hotmail.com (Samantha)
Date: Thu, 24 Feb 2005 22:25:25 -0800
Subject: Output File
References: <Xa2dnWeU9v84KYPfRVn-jQ@adelphia.com>
	<67-dndUDN9NiIoPfRVn-3A@comcast.com>
Message-ID: <St6dnZapJZNNWYPfRVn-jA@adelphia.com>

Thanks Steve. Appreciate it!
S
"Steven Bethard" <steven.bethard at gmail.com> wrote in message 
news:67-dndUDN9NiIoPfRVn-3A at comcast.com...
> Samantha wrote:
>> input = open(r'C:\Documents and 
>> Settings\Owner\Desktop\somefile.html','r')
>> L = input.readlines()
>> input.close
>>
>> output = open(r'C:\Documents and 
>> Settings\Owner\Desktop\somefile_test.html','w')
>> for t in range(len(L)):
>>  output.writelines(L[t])
>> output.close
>
> I think you want to do [1]:
>
> input = open(r'somefile.html', 'r')
> lst = input.readlines()
> input.close() # note the () -- this is a method call
>
> output = open(r'somefile_test.html', 'w')
> output.writelines(lst) # not in a for-loop
> output.close() # note the () -- this is a method call
>
> If you really want to use a for-loop, the code should look like:
>
> for line in L:
>     output.write(line)
>
> If you call writelines when you only want to write one line, you're going 
> to get odd behavior -- Python's going to interpret each character in your 
> line as a "line" itself.
>
>> Also is there a way to test for EOF in Python?
>
> file.read() or file.readline() will return '' if you have reached the end 
> of the file.
>
> STeVe
>
> [1] In fact, what you really probably want to do is to take advantage of 
> the fact that a file is an iterator.  You can write:
>
> input = open(r'somefile.html', 'r')
> output = open(r'somefile_test.html', 'w')
> output.writelines(input)
>
> And the lines of somefile.html will be written to somefile_test.html. You 
> might also look at the shutil module. 




From nick at craig-wood.com  Wed Feb  9 05:31:22 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 09 Feb 2005 10:31:22 GMT
Subject: Efficient checksum calculating on lagre files
References: <5o2nd2-5hl.ln1@pluto.i.infosense.no>
	<4208E537.4070901@chamonix.reportlab.co.uk>
	<mailman.2199.1107881519.22381.python-list@python.org>
Message-ID: <slrnd0jm1s.l3u.nick@irishsea.home.craig-wood.com>

Fredrik Lundh <fredrik at pythonware.com> wrote:
>  on my machine, Python's md5+mmap is a little bit faster than
>  subprocess+md5sum:
> 
>      import os, md5, mmap
> 
>      file = open(fn, "r+")
>      size = os.path.getsize(fn)
>      hash = md5.md5(mmap.mmap(file.fileno(), size)).hexdigest()
> 
>  (I suspect that md5sum also uses mmap, so the difference is
>  probably just the subprocess overhead)

But you won't be able to md5sum a file bigger than about 4 Gb if using
a 32bit processor (like x86) will you?  (I don't know how the kernel /
user space VM split works on windows but on linux 3Gb is the maximum
possible size you can mmap.)

$ dd if=/dev/zero of=z count=1 bs=1048576 seek=8192
$ ls -l z
-rw-r--r--  1 ncw ncw 8590983168 Feb  9 09:26 z

>>> fn="z"
>>> import os, md5, mmap
>>> file = open(fn, "rb")
>>> size = os.path.getsize(fn)
>>> size
8590983168L
>>> hash = md5.md5(mmap.mmap(file.fileno(), size)).hexdigest()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
OverflowError: memory mapped size is too large (limited by C int)
>>> 

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


From apardon at forel.vub.ac.be  Fri Feb 18 03:00:07 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 18 Feb 2005 08:00:07 GMT
Subject: difference between class methods and instance methods
References: <pan.2005.02.17.07.04.37.907754@yahooz.com>
	<Xns96005FE3164DAduncanrcpcouk@127.0.0.1>
	<1119g2rre5g610c@corp.supernews.com>
	<37juh3F5d511mU1@individual.net>
Message-ID: <slrnd1b847.jkb.apardon@rcpc42.vub.ac.be>

Op 2005-02-17, Diez B. Roggisch schreef <deetsNOSPAM at web.de>:
> John wrote:
>> ... hmm... bound methods get created each time you make
>> a call to an instance method via an instance of the given class?
>
> No, they get created when you create an actual instance of an object.

I'm not so sure about that. Take the following code:

>>> class A:
...   def m():
...     pass
... 
>>> a = A()
>>> u = a.m
>>> u is a.m
False

If bound methods were created at instance creation one would expect
a True result here instead of False.

-- 
Antoon Pardon


From simoninusa2001 at yahoo.co.uk  Sat Feb 19 15:05:18 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 19 Feb 2005 12:05:18 -0800
Subject: Pausing a program - poll/sleep/threads?
In-Reply-To: <1108839864.101293.184050@o13g2000cwo.googlegroups.com>
References: <1108625477.222091.34680@l41g2000cwc.googlegroups.com>
	<1119nf8qqj5gfbe@corp.supernews.com>
	<1108666816.520517.91390@o13g2000cwo.googlegroups.com>
	<1119v7o1h4k8be5@corp.supernews.com>
	<1108699641.787642.310960@f14g2000cwb.googlegroups.com>
	<1108839864.101293.184050@o13g2000cwo.googlegroups.com>
Message-ID: <1108843518.024709.139640@f14g2000cwb.googlegroups.com>

Damn, seems Qt GUI objects (windgets) aren't thread-safe:

http://doc.trolltech.com/3.3/threads.html#11

So I'm going to have to find a way of using a thread to fetch the data,
and then using the main program to update the GUI... Someone suggested
using events:

http://mail.python.org/pipermail/python-list/2002-February/089360.html



From jgrahn-nntq at algonet.se  Tue Feb  1 12:21:51 2005
From: jgrahn-nntq at algonet.se (Jorgen Grahn)
Date: 1 Feb 2005 17:21:51 GMT
Subject: Browsing text ; Python the right tool?
References: <bce7fd55.0501250623.7b3230ed@posting.google.com>
	<1106674835.862387.79030@z14g2000cwz.googlegroups.com>
Message-ID: <slrncvvei8.rr5.jgrahn-nntq@frailea.sa.invalid>

On 25 Jan 2005 09:40:35 -0800, beliavsky at aol.com <beliavsky at aol.com> wrote:
> Here is an elementary suggestion. It would not be difficult to write a
> Python script to make a csv file from your text files, adding commas at
> the appropriate places to separate fields. Then the csv file can be
> browsed in Excel (or some other spreadsheet).

I'd create text files like someone else suggested, because I'm more
comfortable with at least three text editors/viewers than with Excel.

But the bottom line is that it's a waste of time to design a new GUI around
a file format, when you can tweak the data enough to reuse something that
exists, and /has/ all the features you will eventually want.

> A0 and C1 records could
> be written to separate csv files.

(Assuming that's OK, I wonder why they shared a file to begin with. Is the
order between A0 and C1 records important?)

/Jorgen

-- 
  // Jorgen Grahn <jgrahn@       Ph'nglui mglw'nafh Cthulhu
\X/                algonet.se>   R'lyeh wgah'nagl fhtagn!


From frans.englich at telia.com  Mon Feb 21 18:02:42 2005
From: frans.englich at telia.com (Frans Englich)
Date: Mon, 21 Feb 2005 23:02:42 +0000
Subject: Accessing files installed with distutils
Message-ID: <200502212302.42707.frans.englich@telia.com>


This is silly. How do I access data files I've installed with distutils? In a 
portable, generic way, I want to find out what is the following path on most 
systems:

/usr/local/lib/python2.4/lib/site-packages/foo/bar.txt

How do I figure out the rest, if I know foo/bar.txt? sys.prefix doesn't get me 
far.

I've googled, and looked in the python reference. I must be blind if the 
distutils section[1] covers this.


Cheers,

		Frans

1.
http://www.python.org/doc/current/dist/dist.html


From steven.bethard at gmail.com  Mon Feb 14 18:35:03 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 14 Feb 2005 16:35:03 -0700
Subject: Inheritance error in python 2.3.4???
In-Reply-To: <1108422852.332215.165790@o13g2000cwo.googlegroups.com>
References: <1108422852.332215.165790@o13g2000cwo.googlegroups.com>
Message-ID: <u_ednVww8IA8qIzfRVn-tg@comcast.com>

friedmud at gmail.com wrote:
> class baseClass(object):
>         __Something = "Dumb!"
> 
>         def getSomething( self ):
>                 return self.__Something
> 
> class subClass(baseClass):
>         def setSomething( self , aSomething ):
>                 self.__Something = aSomething
> 
> 
> anObject = subClass()
> anObject.setSomething("Cool!")
> print anObject.getSomething()

Your mistake is using '__' names when they aren't necessary.  '__' names 
are mangled with the class name:

py> class B(object):
...     __x = False
...     def __init__(self):
...         self.__x = 1
...     def getx(self):
...         return self.__x
...
py> class C(object):
...     def setx(self, x):
...         self.__x = x
...
py> vars(B())
{'_B__x': 1}
py> vars(C())
{}

Note that C instances don't get __x variables because of the mangling.

> Someone please show me the pythonish way to do this!

A number of suggestions:

(1) Generally, you don't need getters and setters.  If you think you do, 
you probably want property instead.

(2) Don't use __ names.  They're a hack that doesn't really make things 
private, and doesn't even avoid name collisions all the time.  There are 
probably a few cases where they're useful, but this is not one of them. 
  If you don't want attributes to show up in automatically generated 
documentation, simply prefix them with a single underscore.

(3) Don't use class-level attributes as defaults for instance-level 
attributes.  If it's part of the instance, set it on the instance.  If 
it's part of the class, set it on the class.  Hiding a class-level 
attribute with an instance-level attribute will most likely lead to 
confusion unless you *really* know what you're doing in Python.

Something like this would probably be best:

py> class BaseClass(object):
...     def __init__(self, something='Dumb!'):
...         self._something = something
...     def _getsomething(self):
...         return self._something
...     something = property(_getsomething)
...
py> class SubClass(BaseClass):
...     def _setsomething(self, something):
...         self._something = something
...     something = property(BaseClass._getsomething, _setsomething)
...
py> b = BaseClass()
py> b.something
'Dumb!'
py> b.something = 1
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
AttributeError: can't set attribute
py> s = SubClass()
py> s.something
'Dumb!'
py> s.something = 'Cool!'
py> s.something
'Cool!'

STeVe


From aleaxit at yahoo.com  Wed Feb  9 18:16:05 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Thu, 10 Feb 2005 00:16:05 +0100
Subject: Vectors in Visual Python
References: <1107944975.498403.225950@f14g2000cwb.googlegroups.com>
	<pbvj01tiob4v5i6usnkr08j10s9koeh5kn@4ax.com>
Message-ID: <1grqqa2.1cnkkbv1l5mrrxN%aleaxit@yahoo.com>

Arthur <ajsiegel at optonline.com> wrote:

> is that VPython "vectors" are in effect flat 3 element Numeric arrays,
> and Numeric ararys can be constructed with Float64 specified as the
> datatype.  (wonder if that speciufication is a "declaration", and if
> so whether that would indicate some conflict between Python's ideology
> (Alex's version) and that of its defacto standard numerical processing
> library - but I digress) .

That ``speciufication'' (sic) is no more ``a "declaration"'' than any
other parameter you can pass to a constructor (or any other factory
callable).  I find it hard to believe that this can be less than
totally, entirely, and utterly obvious to anybody with a 3-digits IQ.


Trying to subdivide the issue into sub-issues that I hope will be pretty
obvious even for most 2-digits IQs...:

I can pass parameters when I call something -- do you think ``that's a
declaration''?!

Some of the calls I perform build and return new objects -- do you
REALLY think ``that's a declaration''?!

Obviously, the parameters I pass will normally affect the results of my
calls -- do you TRULY, SERIOUSLKY think ``that's a declaration''?!

*WHAT ON EARTH* could *POSSIBLY* make you "wonder" if any of these
aspects make a perfectly ordinary executable statement into what's
instead ``a declaration''?!?!


Please clarify if you were making a lame joke without smilies, are
utterly confused about what "declaration" *MEANS*, or what other folly
prompted you to this astounding remark, thanks.  Having found out how to
build a lasting killfile, I'd like to see if using it liberally on
people who appear to post here just to provoke flamewars, rather than to
offer and receive help, and participate in interesting discussion, can
make the newsgroup decently usable to me again.  It's a pity that any
newbie reading the group will be confused and damaged by tons of
unchallenged idiocies posted there by large number of fools, but, ah
well, I can't fix that, obviously -- I can just hope and trust that the
fools' karma suffers in proportion to the stupid harm they inflict.


Alex


From neutrinman at myrealbox.com  Sat Feb 26 03:41:16 2005
From: neutrinman at myrealbox.com (neutrinman at myrealbox.com)
Date: 26 Feb 2005 00:41:16 -0800
Subject: error: db type could not be determined
Message-ID: <1109407276.520167.190630@f14g2000cwb.googlegroups.com>

why does the following error occur?

def quit_time():
	data_file = shelve.open("data.dat", "c")
	data_file["quit_time"] = datetime.datetime.today()
	print data_file["quit_time"]
	raw_input("enter")


Traceback (most recent call last):
  File "D:\a\TEXT\Py\going_over\going_over.py", line 192, in -toplevel-
    main()
  File "D:\a\TEXT\Py\going_over\going_over.py", line 190, in main
    quit_time()
  File "D:\a\TEXT\Py\going_over\going_over.py", line 156, in quit_time
    data_file = shelve.open("data.dat", "c")
  File "D:\A\UTILITIES\PYTHON\PYTHON23J\lib\shelve.py", line 231, in
open
    return DbfilenameShelf(filename, flag, protocol, writeback, binary)
  File "D:\A\UTILITIES\PYTHON\PYTHON23J\lib\shelve.py", line 212, in
__init__
    Shelf.__init__(self, anydbm.open(filename, flag), protocol,
writeback, binary)
  File "D:\A\UTILITIES\PYTHON\PYTHON23J\lib\anydbm.py", line 80, in
open
    raise error, "db type could not be determined"
error: db type could not be determined



From __peter__ at web.de  Tue Feb  8 02:03:31 2005
From: __peter__ at web.de (Peter Otten)
Date: Tue, 08 Feb 2005 08:03:31 +0100
Subject: "Collapsing" a list into a list of changes
References: <dvOMd.33656$EG1.19314@lakeread04><mailman.2034.1107725421.22381.python-list@python.org><cu7532$er8$01$1@news.t-online.com><200502071907.12169.francis.girard@free.fr><mailman.2097.1107802306.22381.python-list@python.org><cu8jlk$5v9$00$1@news.t-online.com><mailman.2109.1107809699.22381.python-list@python.org>
	<cu8ogo$t3o$01$1@news.t-online.com>
	<mailman.2122.1107819716.22381.python-list@python.org>
Message-ID: <cu9o86$4lh$02$1@news.t-online.com>

Fredrik Lundh wrote:

> Peter Otten wrote:
> 
>> *You* are cheating when you take a predefined function implemented in C
>> (operator.mul) and then claim you are using pure Python.
> 
> operator is a standard module in Python.  if you have a desperate need
> to be pointless in public, consider using another newsgroup.
> 
> </F>

No.

Peter



From frans.englich at telia.com  Fri Feb 11 19:00:12 2005
From: frans.englich at telia.com (Frans Englich)
Date: Sat, 12 Feb 2005 00:00:12 +0000
Subject: Hack with os.walk()
Message-ID: <200502120000.12086.frans.englich@telia.com>


Hello,

Have a look at this recursive function:

def walkDirectory( directory, element ):

    element = element.newChild( None, "directory", None ) # automatically 
appends to parent
    element.setProp( "name", os.path.basename(directory))

    for root, dirs, files in os.walk( directory ):

        for fileName in files:
            element.addChild( parseFile( os.path.join( root, fileName ))

        for dirName in filter( acceptDirectory, dirs):
            walkDirectory( os.path.join( root, dirName ), element )

        return ### Note, this is inside for loop

What it does, is it recurses through all directories, and, with libxml2's 
bindings, builds an XML document which maps directly to the file hierarchy. 
For every file is parseFile() called, which returns a "file element" which is 
appended; the resulting structure looks the way one expect -- like a GUI tree 
view.

The current code works, but I find it hackish, and it probably is inefficient, 
considering that os.walk() is not called once(as it usually is), but for 
every directory level.

My problem, AFAICT, with using os.walk() the usual way, is that in order to 
construct the /hierarchial/ XML document, I need to be aware of the directory 
depth, and a recursive function handles that nicely; os.walk() simply 
concentrates on figuring out paths to all files in a directory, AFAICT.

I guess I could solve it with using os.walk() in a traditional way, by somehow 
pushing libxml2 nodes on a stack, after keeping track of the directory levels 
etc(string parsing..). Or, one could write ones own recursive directory 
parser..

My question is: what is the least ugly? What is the /proper/ solution for my 
problem? How would you write it in the cleanest way?


Cheers,

		Frans



From ncoghlan at iinet.net.au  Fri Feb 11 22:34:15 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 12 Feb 2005 13:34:15 +1000
Subject: a sequence question
In-Reply-To: <Ft5Pd.26094$uc.8481@trnddc03>
References: <lzrKd.138680$K7.56500@news-server.bigpond.net.au><Xns95EC9DCBC6294duncanrcpcouk@127.0.0.1>	<mailman.1553.1106960946.22381.python-list@python.org><WYXOd.16353$uc.1671@trnddc02>	<mailman.2388.1108127294.22381.python-list@python.org>
	<Ft5Pd.26094$uc.8481@trnddc03>
Message-ID: <420D7937.4070503@iinet.net.au>

David Isaac wrote:
> If that is right, I still cannot extract it from the doc cited above.
> So where should I have looked?

Ouch. The terminology's evolved, and it looks to me like the docs for the older 
builtins haven't been updated to track it.

The terminology has pretty much settled to 'iterable' for anything which returns 
a sensible result from iter(obj), 'iterator' for any iterable which returns 
itself from iter(obj), 'reiterable' for any iterable which is not an iterator, 
and 'sequence' for any reiterable which supports len(obj) and integer indexing.

That's not the terminology the older docs use, though, even in the most recent 
versions of that page [1].

For most of them it's OK, since the text clarifies what the term means in 
context (e.g. that 'sequence' actually means 'iterable' for some function 
signatures). zip() doesn't do that though - it actually accepts iterables, but 
only talks about sequences.

A bug report on Sourceforge would help in getting the problem fixed for the 2.5 
docs (possibly even the 2.4.1 docs if it happens soon). 2.3's a lost cause 
though, since 2.3.5 is already out the door and only another security bug is 
likely to trigger a new 2.3 release.

For the 'left-to-right' evaluation thing, that's technically an implementation 
artifact of the CPython implementation, since the zip() docs don't make any 
promises. So updating the docs to include that information would probably be a 
bigger issue, as it involves behaviour which is currently not defined by the 
library.

Cheers,
Nick.

[1] http://www.python.org/dev/doc/devel/lib/built-in-funcs.html
-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From exarkun at divmod.com  Sat Feb 12 18:18:26 2005
From: exarkun at divmod.com (Jp Calderone)
Date: Sat, 12 Feb 2005 23:18:26 GMT
Subject: [PATCH] Re: frozenset() without arguments should return a
	singleton
In-Reply-To: <culvhv$fgv$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <20050212231826.21318.1157555454.divmod.quotient.13637@ohm>

On Sat, 12 Feb 2005 23:21:58 +0100, Stefan Behnel <stefan.behnel-n05pam at web.de> wrote:
>
> 
> Raymond Hettinger wrote:
>  >Stefan Behnel wrote:
> >>I stumbled over the fact that 'frozenset()' doesn't return a constant but
> >>creates a new object everytime. Since it is immutable, I wrote to  c.l.py 
> >>that this behaviour is different from what tuple() & Co do.
> > 
> > It is not quite correct to say that this is what all immutables do:
> > 
> > 
> >.>>>x = 500
> >.>>>y = 600 - 100
> >.>>>x is y
> > False
> 
> I know. The same is true for concateneted strings, etc. But whenever an 
> immutable object is created directly ('by hand'), it holds. It also holds, 
> btw, for tuple() - as opposed to ().
> 

    $ python
    Python 2.3.5c1 (#2, Feb  4 2005, 10:10:56) 
    [GCC 3.3.5 (Debian 1:3.3.5-8)] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> long() is long()
    False
    >>> 

  Jp


From irmen.NOSPAM at xs4all.nl  Fri Feb  4 15:45:58 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Fri, 04 Feb 2005 21:45:58 +0100
Subject: ANN: Frog 1.3 released (python 'blog' application)
In-Reply-To: <Xns95F373835F61Ddevnulljoreybumpcom@199.45.49.11>
References: <41fcf53b$0$28986$e4fe514c@news.xs4all.nl>
	<Xns95F373835F61Ddevnulljoreybumpcom@199.45.49.11>
Message-ID: <4203df05$0$28985$e4fe514c@news.xs4all.nl>

Jorey Bump wrote:
> Irmen de Jong <irmen at -nospam-remove-this-xs4all.nl> wrote in news:41fcf53b
> $0$28986$e4fe514c at news.xs4all.nl:
> 
> 
>>I've just uploaded the Frog 1.3 release.
>>
>>Frog is a blog (web log) system written in 100% Python.
>>It is a web application written for Snakelets.
>>It outputs XHTML, is fully unicode compatible, small,
>>and doesn't require a database.
>>
>>Frog 1.3 uses the same storage format as 1.2 so no conversion
>>is required. If you encounter bugs or problems, or want to give
>>some feedback, please let me know.
> 
> 
> Very nice. I downloaded the complete version and ran it within Cygwin 
> without any problems, except that the simple file browser is not included. 
> The Files link returns a 404 error.

Ah yes. I simply forgot to include it, sorry about that.

> Are there any plans to include a per user file manager? This would allow 
> file management for a large user base, where ftp uploads would be 
> impractical and unsafe. 

I've added a 'filemgr' package to the files section; you can
get the file manager separately from there.
Or re-download the Frog-complete package (I've replaced it
with a version where the file manager is included).

http://sourceforge.net/project/showfiles.php?group_id=41175

Read the README file first.

Please let me know what you think of Frog and the FileMgr.

--Irmen de Jong.


From rbt at athop1.ath.vt.edu  Fri Feb  4 14:55:01 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Fri, 04 Feb 2005 14:55:01 -0500
Subject: string issue
In-Reply-To: <R4QMd.33663$EG1.10366@lakeread04>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu> <R4QMd.33663$EG1.10366@lakeread04>
Message-ID: <cu0jul$lm5$1@solaris.cc.vt.edu>

Alan McIntyre wrote:
> I think it's because you're modifying the list as you're iterating over 
> it.  

One last clarification on this. It's OK to modify the elements of a 
list, but not the list itself while iterating over it... is that the 
correct way to think about this?


From steven.bethard at gmail.com  Fri Feb 11 20:12:37 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 11 Feb 2005 18:12:37 -0700
Subject: exception handling for a function returning several values
In-Reply-To: <3064b51d.0502111701.1731fef3@posting.google.com>
References: <3064b51d.0502111701.1731fef3@posting.google.com>
Message-ID: <uumdnZWx69icxZDfRVn-hA@comcast.com>

beliavsky at aol.com wrote:
> If a function that normally returns N values raises an exception, what
> should it return?

Depends on what you want to do with the result of the function.

> N values of None seems reasonable to me, so I would
> write code such as
> 
> def foo(x):
>     try:
>        # code setting y and z
>        return y,z
>     except:
>        return None,None
> 
> y,z = foo(x)

You almost never want a bare except.  What exception are you catching?

My suspicion is that the code would be better written as:

def foo(x):
     # code settying y and z
     return y, z

try:
     y, z = foo(x)
except FooError:
     y, z = None, None

but I'm not sure if you really want y and z to be None if foo fails. 
What do you do with y and z?

Steve


From pythongnome at hotmail.com  Tue Feb  1 16:39:11 2005
From: pythongnome at hotmail.com (Lucas Raab)
Date: Tue, 01 Feb 2005 21:39:11 GMT
Subject: Suggesion for an undergrad final year project in Python
In-Reply-To: <pan.2005.02.01.13.29.34.553770@autismuk.muralichucks.freeserve.co.uk>
References: <1107241918.722156.123590@c13g2000cwb.googlegroups.com>
	<7mKLd.18577$MX2.6627@twister.nyroc.rr.com>
	<pan.2005.02.01.13.29.34.553770@autismuk.muralichucks.freeserve.co.uk>
Message-ID: <3GSLd.6641$Ix.3218@newsread3.news.atl.earthlink.net>

Paul Robson wrote:
> On Tue, 01 Feb 2005 12:11:47 +0000, Kartic wrote:
> 
> 
>>Sridhar said the following on 2/1/2005 2:11 AM:
>>
>>>Hi,
>>>
>>>I am doing my undergrade CS course.  I am in the final year, and would
>>>like to do my project involving Python.  Our instructors require the
>>>project to have novel ideas.  Can the c.l.p people shed light on this
>>>topic?
>>
>>You try and implement some CS concepts you have learnt using Python. For 
>>example, if you had a course on parsing and compiler design, try to 
>>implement a simple language in Python.
> 
> 
> Could I suggest going for an area that particularly interests you ; rather
> than saying "what sort of project ...." come up with an area of interest -
> this'll mean you probably have more knowledge and will put in more
> effort - and then ask for ideas - ideally about something that is missing.
> 

Exactly. If you have an interest in mathematics, then look into 
Numarray. Graphics: Panda3d, Blender, pygame... The list goes on. Feel 
free to append.


From aurora00 at gmail.com  Mon Feb 21 01:20:18 2005
From: aurora00 at gmail.com (aurora)
Date: Sun, 20 Feb 2005 22:20:18 -0800
Subject: unicode encoding usablilty problem
References: <opsmekm2ei6yt6e7@news.cisco.com>	<42164d01$0$4676$9b622d9e@news.freenet.de>	<opsme4lcjo6yt6e7@news.cisco.com>	<42186016.7030309@v.loewis.de>
	<mailman.2857.1108901156.22381.python-list@python.org>
	<mailman.2860.1108908074.22381.python-list@python.org>
Message-ID: <opsmjaj4d26yt6e7@news.cisco.com>

On Sun, 20 Feb 2005 15:01:09 +0100, Martin v. L?wis <martin at v.loewis.de>  
wrote:

> Nick Coghlan wrote:
>> Having "", u"", and r"" be immutable, while b"" was mutable would seem  
>> rather inconsistent.
>
> Yes. However, this inconsistency might be desirable. It would, of  
> course, mean that the literal cannot be a singleton. Instead, it has
> to be a display (?), similar to list or dict displays: each execution
> of the byte string literal creates a new object.
>
>> An alternative would be to have "bytestr" be the immutable type  
>> corresponding to the current str (with b"" literals producing  
>> bytestr's), while reserving the "bytes" name for a mutable byte  
>> sequence.
>
> Indeed. This maze of options has caused the process to get stuck.
> People also argue that with such an approach, we could as well
> tell users to use array.array for the mutable type. But then,
> people complain that it doesn't have all the library support that
> strings have.
>
>> The main point being, the replacement for 'str' needs to be immutable  
>> or the upgrade process is going to be a serious PITA.
>
> Somebody really needs to take this in his hands, completing the PEP,
> writing a patch, checking applications to find out what breaks.
>
> Regards,
> Martin

What is the processing of getting a PEP work out? Does the work and  
discussion carry out in the python-dev mailing list? I would be glad to  
help out especially on this particular issue.


From jelleferinga at gmail.com  Wed Feb  2 04:16:06 2005
From: jelleferinga at gmail.com (jelle)
Date: 2 Feb 2005 01:16:06 -0800
Subject: pythonic equivalent of Mathematica's FixedPoint function
In-Reply-To: <mailman.1711.1107294069.22381.python-list@python.org>
References: <1107273234.276714.272890@z14g2000cwz.googlegroups.com>
	<1107273715.614766.32810@f14g2000cwb.googlegroups.com>
	<mailman.1711.1107294069.22381.python-list@python.org>
Message-ID: <1107335766.734539.281770@l41g2000cwc.googlegroups.com>

>You could probably write your own FixedPoint function without too much
>difficulty, with the only tricky part being for it to know when to
stop!

It would be quite interesting to have this kind of function. But
likely its far from trivial.
FixedPoint seems to be one of the core functions in Mathematica, where
many other functions are based on. Some additions such as FixedPoint
would make functional programming in Python more functional is suppose.
Or would anyone consider it sugar syntax for ??



From smadim2 at grads.ece.mcmaster.ca  Sat Feb 26 00:35:57 2005
From: smadim2 at grads.ece.mcmaster.ca (Mohammed Smadi)
Date: Sat, 26 Feb 2005 00:35:57 -0500 (EST)
Subject: sockets question
Message-ID: <Pine.LNX.4.44.0502260028410.32042-100000@grads.ece.mcmaster.ca>

hi;

i have the following piece of code:
=============
s = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
s.bind(("",port))
s.sendto(data,(MY_GW,port)) 
data = s.recvfrom(1024)  
============

data contains some instructions which i am sending to MY_GW.  If the 
reply arrives from the MY_GW quickly then things fine, otherwise the 
program is going to freeze waiting for the reply.  I want to do the 
following:

1- Be able to impose a timeout after which i want to stop executing 
the s.recvfrom statement.

rgds;
m.smadi



From Felix.Wiemann at gmx.net  Sat Feb 19 08:04:13 2005
From: Felix.Wiemann at gmx.net (Felix Wiemann)
Date: Sat, 19 Feb 2005 14:04:13 +0100
Subject: duplicate docstrings
References: <R5mdnTmEiaIop4vfRVn-hw@comcast.com>
Message-ID: <87psywem5u.fsf@news2.ososo.de>

Steven Bethard wrote:

> class C(object):
>      def foo(self):
>          """Foo things"""
>          ...
>
> class D(object):
>      def foo(self):
>          """Foo things"""
>          ...
>
> It bothers me that I'm basically writing the same docstrings multiple
> times.  I guess what I really want to do is just write the docstrings
> for the interface I'm describing, and only supply docstrings in the
> classes when they need to differ from the interface docstrings.
>
> Is there a good way to do this?  If it's necessary, I can have C and D
> inherit from another class...

Use a common interface type and a metaclass which copies method
docstrings from base classes:

------------------------------------------------------------------------------
#!/usr/bin/env python

import inspect


class DocstringMetaclass(type):
    
    """Copy method docstrings."""
    
    def __init__(cls, *args):
        super(DocstringMetaclass, cls).__init__(*args)
        for name, method in cls.__dict__.iteritems():
            # method is a function, not a method, so we use isfunction().
            if not inspect.isfunction(method) or method.__doc__ is not None:
                continue
            for c in cls.mro():
                if hasattr(c, name):
                    m = getattr(c, name)
                    if inspect.ismethod(m) and m.__doc__ is not None:
                        method.__doc__ = m.__doc__
                        break


class Interface(object):

    __metaclass__ = DocstringMetaclass

    def foo(self):
        """Foo things"""

    def bar(self):
        """Bar things"""

    def baz(self):
        """Baz things in a C manner"""


class Implementation(Interface):

    def foo(self):
        pass

    def bar(self):
        pass

    def baz(self):
        pass


print Implementation.foo.__doc__
print Implementation.bar.__doc__
print Implementation.baz.__doc__
------------------------------------------------------------------------------

Output:

Foo things
Bar things
Baz things in a C manner

-- 
Felix Wiemann -- http://www.ososo.de/


From jeff at ccvcorp.com  Wed Feb  9 21:10:40 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Wed, 09 Feb 2005 18:10:40 -0800
Subject: newbie question
In-Reply-To: <1107992130.921664.68860@z14g2000cwz.googlegroups.com>
References: <1107990182.516041.120410@o13g2000cwo.googlegroups.com>
	<xfOdnUnRLYukB5ffRVn-tA@powergate.ca>
	<1107992130.921664.68860@z14g2000cwz.googlegroups.com>
Message-ID: <110lgig2to6r139@corp.supernews.com>

doodle4 at gmail.com wrote:

> Thanks for the reply.
> 
> I am trying to convert some C code to python and i was not sure what
> the equivalent python code would be.
> 
> I want to postdecrement the value in the while loop. Since i cannot use
> assignment in while statements is there any other way to do it in
> python?

Roughly speaking, if you have a loop in C like

while (n--) {
     func(n);
}

then the mechanical translation to Python would look like this:

while True:
     n -= 1
     if not n:
         break
     func(n)

However, odds are fairly decent that a mechanical translation is not 
the best approach, and you may (as just one of many examples) be much 
better off with something more like:

for i in range(n)[::-1]:
     func(n)

The '[::-1]' iterates over the range in a reverse (decreasing) 
direction; this may or may not be necessary depending on the 
circumstances.

Jeff Shannon
Technician/Programmer
Credit International



From aleaxit at yahoo.com  Sun Feb  6 11:07:31 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 6 Feb 2005 17:07:31 +0100
Subject: Python versus Perl ?
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
	<36mmseF54e67mU1@individual.net>
Message-ID: <1grkmt8.3lwu941n35dalN%aleaxit@yahoo.com>

Reinhold Birkenfeld <reinhold-birkenfeld-nospam at wolke7.net> wrote:
   ...
> > Perl also has excellent pattern matching compared to
> > sed, not sure about how Python measures up,
> >  but this seems to make perl ideally suited to text processing.
> 
> Python has regular expressions much like Perl. The only difference is
> that Perl carries syntactic support for them, while in Python regular
> expressions are ordinary objects with methods etc.

In many ways, Python's modularity is advantageous here.  However, since
(I believe) about Perl 5.2 or so, Perl's regular expressions aren't --
they're more powerful than regular expressions, because you can embed
arbitrary Perl code in them as part of the matching process.  Python's
regular expressions are very close to those of Perl 5.X for some X<2 (I
think it was 5.2 where the code-embedding trick was introduced, but
that's something of a guess on my part).

> > I also did a search of job
> > postings on a popular website. 108 jobs where listed that require
> > knowledge of Perl, only 17 listed required Python. Becomeing more
> > familiar with Perl might then be usefull for ones resume ?
> 
> It doesn't harm, of course. Recent statistics about programmers'
> salaries indicate, however, that Python ranks top (I somehow lost the URL).

"Software Development" magazine has run such polls for years, and the
fact that Pythonistas' salaries are at the top has been true since the
first such poll -- not a huge difference, but statistically significant.
What this finding _means_ is, of course, somewhat of a mystery
(correlation isn't causation), as is, of course, the OP's less formal
observation about job postings.


Alex


From ngps at netmemetic.com  Tue Feb  1 17:04:50 2005
From: ngps at netmemetic.com (Ng Pheng Siong)
Date: Tue, 1 Feb 2005 22:04:50 +0000 (UTC)
Subject: Using HTTPSConnection and verifying server's CRT
References: <41fe5357@epflnews.epfl.ch> <ctlmds$g64$2@nobel.pacific.net.sg>
	<41fe5fb7@epflnews.epfl.ch> <41ff4157@epflnews.epfl.ch>
Message-ID: <ctoue2$glc$1@nobel.pacific.net.sg>

According to Marc Poulhi?s  <marc.poulhies at NO-SP44Mepfl.ch>:
> Btw, thanks for your answer (this will save me from using Perl!)

You're welcome.

> ## what are the diff between these two??
> #ctx.load_verify_info(cafile="/tmp/ca.crt")
> ctx.load_verify_locations(cafile="/tmp/ca.crt")

None. One is an alias for the other, to adhere to OpenSSL's naming
convention.

> $ ./ssl_peer_verif.py 
> Enter passphrase:
> send: 'GET / HTTP/1.1\r\nHost:
> my.ssl.server.domain:443\r\nAccept-Encoding: identity\r\n\r\n'
> reply: 'HTTP/1.1 200 OK\r\n'
> header: Date: Tue, 01 Feb 2005 08:41:51 GMT
> header: Server: Apache/2.0.46 (Red Hat)
> header: Last-Modified: Mon, 31 Jan 2005 14:50:50 GMT
> header: ETag: "4297-13-24658680"
> header: Accept-Ranges: bytes
> header: Content-Length: 19
> header: Connection: close
> header: Content-Type: text/html; charset=UTF-8
> THIS IS WORKING =)

Excellent! ;-)


-- 
Ng Pheng Siong <ngps at netmemetic.com> 

http://sandbox.rulemaker.net/ngps -+- M2Crypto, ZServerSSL for Zope, Blog
http://www.sqlcrypt.com -+- Database Engine with Transparent AES Encryption


From tim.golden at viacom-outdoor.co.uk  Thu Feb 17 03:35:08 2005
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Thu, 17 Feb 2005 08:35:08 -0000
Subject: huge help for interactive python
Message-ID: <9A28C052FF32734DACB0A288A3533991035AFC@vogbs009.gb.vo.local>

[David S.]

[... snip recommendation of Gary Bishop's readline ...]

| 
| I could not find a list of the keyboard commands 
| that readline supports, so I generated:
| 
| http://fsinnovations.net/share/keymap.pdf

Brilliant! Thanks very much. I've half-used ipython
for several months, but I'm so keyboard-aware in
the normal Windows cmd shell that I found it a hard 
switch, no matter how well- motivated I was. Now I 
hope to make the best of both worlds.

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________


From onurb at xiludom.gro  Mon Feb 14 05:02:01 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Mon, 14 Feb 2005 11:02:01 +0100
Subject: Newbie help
In-Reply-To: <lvUPd.10137$pE1.923@bignews3.bellsouth.net>
References: <lvUPd.10137$pE1.923@bignews3.bellsouth.net>
Message-ID: <4210771a$0$14530$626a14ce@news.free.fr>

Chad Everett wrote:
> Hey guys,
> 
> Hope you can help me again with another problem.  I am trying to learn 
> Python on my own and need some help with the following.
> 
> I am writing a program that lets has the pc pick a number and the user 
> has five guess to get the number.
> 1. BUG:  If the number is say 35 and I guess 41 the program tells me 
> that I guessed the correct number and tells me I guessed 31.
> 
> 2.When I do get the correct number I can not get the program to stop 
> asking me for the number.
> 
> 
> Your help is greatly appreciated.
> 
> Chad
> 
> # Five Tries to Guess My Number
> #
> # The computer picks a random number between 1 and 100
> # The player gets Five tries to guess it and the computer lets
> # the player know if the guess is too high, too low
> # or right on the money
> #
> # Chad Everett 2/10/2005
> 
> import random
> 
> print "\tWelcome to 'Guess My Number'!"
> print "\nI'm thinking of a number between 1 and 100."
> print "You Only Have Five Guesses.\n"
> 
> # set the initial values
> number = random.randrange(100) + 1
> guess = int(raw_input("Go Ahead and Take a guess: "))
> tries = 1
> 
> 
> # guessing loop
> 
> 
> while guess != number:

You actually need a second condition : tries >= 5

> 
>     if (guess > number):
>         print "Guess Lower..."
>     else:
>         print "Guess Higher..."

The fact that guess is not strictly greater than number doesn't mean 
it's strictly lower... You should handle 3 cases :
1/ guess > number
2/ guess < number
3/ guess == number

Here the 2/ and /3 are handled by the same branch...

>     guess = int(raw_input("Take Another guess: "))
>     tries += 1

>     print "You guessed it!  The number was", number
>     print "And it only took you", tries, "tries!\n"

This will be executed whatever ! This code should be *outside* the loop. 
(remember that in Python, whitespace is significative...)

(snip)

HTH
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for 
p in 'onurb at xiludom.gro'.split('@')])"


From jyap80 at gmail.com  Sat Feb 12 06:40:09 2005
From: jyap80 at gmail.com (Julian Yap)
Date: Sat, 12 Feb 2005 22:40:09 +1100
Subject: Iterate through dictionary of file objects and file names
Message-ID: <420deb18$1_1@news.iprimus.com.au>

Hi all,
I'm trying to get some ideas on the best way to do this.

In this particular coding snippet, I was thinking of creating a 
dictionary of file objects and file names.  These would be optional 
files that I could open and parse.  At the end, I would easily close off 
the files by iterating through the dictionary.

---< CODE FOLLOWS >---
optionalfiles = {fileAreaCode: "areacode.11", fileBuild: "build.11"}

# Try to see if optional file exists, if so, open.
try:
     for key, optionalFile in optionalFiles.iteritems():
         key = open(optionalFile, "r")
except IOError:
     key = False

...

# Close optionally open files
for key, optionalFile in optionalFiles.iteritems():
     if optionalFile:
         print "Closing: %s" % optionalFile
         key.close()

---< END CODE >---

My questions are:
Is this even possible in a dictionary to have a key of a file object?
If so, how do I initialise an empty file object?  I mean, something 
along the lines of:
fileAreaCode = open("", "r")
If not, any suggestions on achieving openning optional files in a loop? 
  Otherwise I'm stuck with:

---< BEGIN >---

# Optional input files
try:
     fileAreaCode = open("areacode.11", "r")
except:
     fileAreaCode = False

try:
     fileBuild = open("build.11", "r")
except:
     fileBuild = False

...

# Close files
for optionalFile in [fileAreaCode, fileBuild]:
     if optionalFile:
         print "Closing: %s" % str(optionalFile)
         optionalFile.close()

---< END >---

Thanks,
Julian


From jtp11 at att.net  Wed Feb  9 21:38:51 2005
From: jtp11 at att.net (Jim)
Date: 9 Feb 2005 18:38:51 -0800
Subject: Loop in list.
In-Reply-To: <mailman.2214.1107900378.22381.python-list@python.org>
References: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
	<3e8ca5c805020813074e975a4d@mail.gmail.com>
	<mailman.2214.1107900378.22381.python-list@python.org>
Message-ID: <1108003131.605166.309350@c13g2000cwb.googlegroups.com>

Wow!  All I wanted to do was write the equivalence
of the Fortran statement:  Real*4 matrix(n,n).

I'm going to have to go to the intrepreter to see what
your saying.

Thanks for all the help.

Jim



From michele.simionato at gmail.com  Fri Feb  4 07:01:25 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 4 Feb 2005 04:01:25 -0800
Subject: making symlinks with distutils
In-Reply-To: <pan.2005.02.04.10.59.14.434381@logilab.fr>
References: <1107513934.428944.257820@z14g2000cwz.googlegroups.com>
	<pan.2005.02.04.10.59.14.434381@logilab.fr>
Message-ID: <1107518485.557475.312410@c13g2000cwb.googlegroups.com>

>From what I see in the docs, registering a script just normalize the
shebang line, but does not install it in
/usr/bin, nor make any symbolic links, so it is not
what I am looking for.
I guess I need to add a os.link(src, dst) somewhere in the
setup.py script or in a postinstallation script but I am not exactly
sure where.

 M.S.



From tim at upperorbit.com  Mon Feb 21 19:17:37 2005
From: tim at upperorbit.com (Tim Knauf)
Date: Tue, 22 Feb 2005 13:17:37 +1300
Subject: Mixing Txinter and Pygame
Message-ID: <421A7A21.8030001@upperorbit.com>

Hi everyone, I'm glad to have found this list.

I've written a small script for my own use which, amongst other things, 
captures mouse click information from a window containing an image. I 
used Pygame to manage the image window, as it was the easiest way to 
implement the functionality I needed. The surrounding interface windows 
(there are two) are constructed with Tkinter.

Despite their unholy union, Pygame and Tkinter seem, generally, to 
cooperate. I'm using this main loop to update one, then the other:

while 1:
    gameLoop() # This function pumps the Pygame events and checks for 
mouse and keyboard events
    pygame.time.wait(10)
    mainwin.update() # mainwin is an instance of Application class, 
which is a child of Tkinter.frame

I have my interface set up so that when *any* of the windows' close 
boxes are clicked, this function will be called:

# This portion of the Pygame loop calls doquit() when it gets a 'QUIT' 
event...
def gameLoop():
    pygame.event.pump()
    for event in pygame.event.get():
        if event.type == QUIT:
            doquit()
            # Etc.

    # And this portion of the Tkinter interface sets the 
WM_DELETE_WINDOW protocol to call doquit()
    def createWidgets(self):
        self.title("Region Management")
        self.geometry('+830+8')
        self.protocol("WM_DELETE_WINDOW", doquit)
        # Etc.

# A temporary file is removed, and both Pygame and Tkinter are 
instructed to quit
def doquit():
    if os.access('recalc.tmp', os.F_OK):
        os.remove('recalc.tmp')
    pygame.quit()
    mainwin.master.destroy()

Perhaps you've begun to see where I might be having problems. You see, 
if I close the script by closing the Pygame window, I get this exception:

Traceback (most recent call last):
  File "D:\Development\Python\sludge helpers\addScreenRegion 
helper.pyw", line 363, in ?
    mainwin.update()
  File "C:\Python24\lib\lib-tk\Tkinter.py", line 859, in update
    self.tk.call('update')
TclError: can't invoke "update" command:  application has been destroyed

Conversely, if I close the application by closing a Tkinter window, I 
get this exception:

Traceback (most recent call last):
  File "D:\Development\Python\sludge helpers\addScreenRegion 
helper.pyw", line 361, in ?
    gameLoop()
  File "D:\Development\Python\sludge helpers\addScreenRegion 
helper.pyw", line 203, in gameLoop
    pygame.event.pump()
error: video system not initialized

Obviously, Pygame doesn't like Tkinter telling it to quit (when it's 
trying to do something from its internal loop) and vice versa. Is there 
a simple way that I can avoid getting these exceptions on exit, or have 
I taken the wrong approach? Everything else appears to work fine. Please 
do excuse me if this seems a silly question, as I'm fairly new to Python 
and Pygame, and a total novice when it comes to Tkinter.

On a side note, has anyone else found the Tkinter documentation awfully 
obscure? I've found Python a joy to learn about, and Pygame's tutorials 
are a lot of fun. I can't say the same for Tkinter, and found myself 
having to do many Google searches before I uncovered information I could 
put to use. Has anyone found any high-quality (online) documentation 
that proves me wrong? :^)

Thanks in advance,
Tim Knauf


From mwm at mired.org  Mon Feb 14 17:47:04 2005
From: mwm at mired.org (Mike Meyer)
Date: Mon, 14 Feb 2005 16:47:04 -0600
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cup249$svu$1@gemini.csx.cam.ac.uk>
	<cupqb6$1oi$1@usenet.otenet.gr>
Message-ID: <86u0oeiwt3.fsf@guru.mired.org>

Ilias Lazaridis <ilias at lazaridis.com> writes:
> If it is a programming language, the requirement "using an open-source
> toolchain" is a rational and valid one.

It is. However, mingW has nothing to do with "using an open-sourcer
toolchain".

Python runs in an environment with a full, open-source tool chain. You
can use it on Linux or any of the various BSDs. It also runs in an
environment where you can't have an open-source toolchain: Windows.

Once you've given up on an open-source environment, arguing about
trivia like which free compiler you are going to use is a waste of
time. Either use a real open-source environment, or live with the
closed-source tools/environment that someone is willing to support.

Or, of course, support the environment you want yourself.

    <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From steven.bethard at gmail.com  Thu Feb  3 19:42:21 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 03 Feb 2005 17:42:21 -0700
Subject: dict indexed by lists - ?
In-Reply-To: <MSGID_2=3A5025=2F3.131_4202e613@fidonet.org>
References: <MSGID_2=3A5025=2F3.131_4202e613@fidonet.org>
Message-ID: <jZ6dnRF_r-5xWZ_fRVn-hA@comcast.com>

Alexander Zatvornitskiy wrote:
> Hello All!
> 
> I'am trying to make something like this:
> 
> CPT={ ['b0','c0']:1, ['b0','c1']:0, ['b1','c0']:3, ['b1','c1']:1 }
> 
> but python says "TypeError: list objects are unhashable"
> 
> I can replace list with touple: CPT={ ('b0','c0'):1, ('b0','c1'):0, ...and so
> on. But, where is one problem: indexes (or, more precisely, keys) are generated
> dynamically, like code below! I can't do it with touples.
> 
> 
>     key=[]
>     for up in uplinks:
>       key.append(up.state(0))
> 
> 
> and, later, modifying it like this:
>   key[2]=up.next_state()
>   ...
>   print CPT[key]
> 
> Any suggestions?

You can manually add the tuple calls:

     CPT = {('b0','c0'):1, ('b0','c1'):0, ('b1','c0'):3, ('b1','c1'):1}
     ...
     key = [up.state(0) for up in uplinks]
     ...
     key[2] = up.next_state()
     ...
     print CPT[tuple(key)]

I've only added the tuple call when you actually access CPT, but 
depending on your code, you might find that you can make the tuple call 
earlier.  For example, the following code should work:

     CPT={('b0','c0'):1, ('b0','c1'):0, ('b1','c0'):3, ('b1','c1'):1}
     ...
     key = tuple([up.state(0) for up in uplinks])
     ...
     print CPT[key]

where basically you convert key back to a tuple any time it's changed.

STeVe


From Scott.Daniels at Acm.Org  Wed Feb  9 20:21:38 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Wed, 09 Feb 2005 17:21:38 -0800
Subject: negative integer division
In-Reply-To: <420A98C7.103157A@yahoo.com>
References: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
	<42096EAD.879E8A5F@yahoo.com> <86wtti76cp.fsf@guru.mired.org>
	<420A916C.94F7F175@yahoo.com> <420a9513$0$29477$a1866201@visi.com>
	<420A98C7.103157A@yahoo.com>
Message-ID: <420ab366@nntp0.pdx.net>

Jive Dadson wrote:
> ....
> I've forgotten what we are arguing about, but I'm sure I'm right.

^^^ QOTW

--Scott David Daniels
Scott.Daniels at Acm.Org


From ville at spammers.com  Mon Feb 21 03:28:25 2005
From: ville at spammers.com (Ville Vainio)
Date: 21 Feb 2005 10:28:25 +0200
Subject: [Fwd: Re: [Uuu-devel] languages] <-- Why Python
References: <mailman.2781.1108677768.22381.python-list@python.org>
	<1108678805.542584.171930@z14g2000cwz.googlegroups.com>
	<mailman.2783.1108679758.22381.python-list@python.org>
	<864qgaisoq.fsf@guru.mired.org>
	<mailman.2785.1108689484.22381.python-list@python.org>
	<86vf8qhcql.fsf@guru.mired.org>
	<mailman.2787.1108691319.22381.python-list@python.org>
	<86r7jdh5vw.fsf@guru.mired.org>
	<5339b60d.0502200139.63509594@posting.google.com>
	<86braeh2i2.fsf@guru.mired.org>
Message-ID: <du7fyzquxjq.fsf@lehtori.cc.tut.fi>

>>>>> "Mike" == Mike Meyer <mwm at mired.org> writes:

    Mike> I've actually done some work on using CORBA as a COM for
    Mike> Unix (or, as I think of it, an ARexx for Unix). After being
    Mike> exposed to Plan 9, I've decided that's a better
    Mike> solution. CORBA has the advantage that you can work on it
    Mike> without getting buy-in from kernel vendors.

The problem w/ CORBA is the alleged lack of speed. ISTR there was lots
of controversy w/ the way Gnome used CORBA (Bonobo) and how it was too
slow for Desktop apps. I don't know what the current status is - CORBA
has always seemed more than fast enough for me.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From nessus at mit.edu  Sat Feb 26 18:07:39 2005
From: nessus at mit.edu (Douglas Alan)
Date: Sat, 26 Feb 2005 18:07:39 -0500
Subject: Canonical way of dealing with null-separated lines?
References: <lcll9efw8l.fsf@gaffa.mit.edu>
	<mailman.3006.1109264015.22381.python-list@python.org>
	<5aes11d4da95un1n78vtb04m43269hqo4m@4ax.com>
	<mailman.3020.1109281886.22381.python-list@python.org>
	<lc7jkvdcxq.fsf@gaffa.mit.edu>
Message-ID: <lcis4esyx0.fsf@gaffa.mit.edu>

I wrote:

> Okay, here's the definitive version (or so say I).  Some good doobie
> please make sure it makes its way into the standard library:

Oops, I just realized that my previously definitive version did not
handle multi-character newlines.  So here is a new definition
version.  Oog, now my brain hurts:

def fileLineIter(inputFile, newline='\n', leaveNewline=False, readSize=8192):
   """Like the normal file iter but you can set what string indicates newline.

   The newline string can be arbitrarily long; it need not be restricted to a
   single character. You can also set the read size and control whether or not
   the newline string is left on the end of the iterated lines.  Setting
   newline to '\0' is particularly good for use with an input file created with
   something like "os.popen('find -print0')".
   """
   isNewlineMultiChar = len(newline) > 1
   outputLineEnd = ("", newline)[leaveNewline]

   # 'partialLine' is a list of strings to be concatinated later:
   partialLine = []

   # Because read() might unfortunately split across our newline string, we
   # have to regularly check to see if the newline string appears in what we
   # previously thought was only a partial line.  We do so with this generator:
   def linesInPartialLine():
      if isNewlineMultiChar:
         linesInPartialLine = "".join(partialLine).split(newline)
         if linesInPartialLine > 1:
            partialLine[:] = [linesInPartialLine.pop()]
            for line in linesInPartialLine:
               yield line + outputLineEnd

   while True:
      charsJustRead = inputFile.read(readSize)
      if not charsJustRead: break
      lines = charsJustRead.split(newline)
      if len(lines) > 1:
         for line in linesInPartialLine(): yield line
         partialLine.append(lines[0])
         lines[0] = "".join(partialLine)
         partialLine[:] = [lines.pop()]
      else:
         partialLine.append(lines.pop())
         for line in linesInPartialLine(): yield line
      for line in lines: yield line + outputLineEnd
   for line in linesInPartialLine(): yield line
   if partialLine and partialLine[-1] != '':
      yield "".join(partialLine)


|>oug


From theller at python.net  Tue Feb  8 06:22:51 2005
From: theller at python.net (Thomas Heller)
Date: Tue, 08 Feb 2005 12:22:51 +0100
Subject: Choosing the right parser for parsing C headers
References: <1107861023.254610.14310@g14g2000cwa.googlegroups.com>
Message-ID: <6513gut0.fsf@python.net>

"Jean  de Largentaye" <jlargentaye at gmail.com> writes:

> Hi,
>
> I need to parse a subset of C (a header file), and generate some unit
> tests for the functions listed in it. I thus need to parse the code,
> then rewrite function calls with wrong parameters. What I call "shaking
> the broken tree" :)

IMO, for parsing 'real-world' C header files, nothing can beat gccxml.

Thomas


From nytimes at swiftdsl.com.au  Thu Feb 10 17:32:44 2005
From: nytimes at swiftdsl.com.au (news.sydney.pipenetworks.com)
Date: Fri, 11 Feb 2005 09:32:44 +1100
Subject: Python v.s. c++
In-Reply-To: <mailman.2331.1108060722.22381.python-list@python.org>
References: <mailman.2331.1108060722.22381.python-list@python.org>
Message-ID: <420BE10C.5090407@swiftdsl.com.au>

xiaobin yang wrote:
> Hi,  if i am already skillful with c++.  Is it useful to learn python? thanks!

Does skillful mean you can do anything with ease and quick enough for 
you and your clients ? Are your results bug free and easy to maintain ? 
If the answer to all this is yes then probably not. If the answer to any 
of this is no then the answer is *yes*; in which case many c++ 
programmers might disagree that you are skillful enough ;-)

Joking aside, you will love python and is well worth it since you can 
still use your c++ skills. Actually I wished I was skillful in c++, then 
I wouldn't be so lost when interfacing to windows shite.


Huy


From crankycoder at gmail.com  Fri Feb 25 10:22:32 2005
From: crankycoder at gmail.com (Victor Ng)
Date: Fri, 25 Feb 2005 10:22:32 -0500
Subject: Is there way to determine which class a method is bound to?
In-Reply-To: <vueu115tqf6dbbakaedt2148vjj3hc84j5@4ax.com>
References: <a8bfd74c05022506466cd6d3fc@mail.gmail.com>
	<vueu115tqf6dbbakaedt2148vjj3hc84j5@4ax.com>
Message-ID: <a8bfd74c050225072261fb329d@mail.gmail.com>

No - that doesn't work, im_class gives me the current class - in the
case of inheritance, I'd like to get the super class which provides
'bar'.

I suppose I could walk the __bases__ to find the method using the
search routine outlined in:

http://www.python.org/2.2/descrintro.html

but I was hoping for an automatic way of resolving this.

vic

On Fri, 25 Feb 2005 14:54:34 +0000, Richie Hindle <richie at entrian.com> wrote:
> 
> [vic]
> > I'm doing some evil things in Python and I would find it useful to
> > determine which class a method is bound to when I'm given a method
> > pointer.
> 
> Here you go:
> 
> >>> class Foo:
> ...   def bar(self):
> ...     pass
> ...
> >>> Foo.bar.im_class
> <class __main__.Foo at 0x008ED720>
> >>> Foo().bar.im_class
> <class __main__.Foo at 0x008ED720>
> >>>
> 
> --
> Richie Hindle
> richie at entrian.com
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From danb_83 at yahoo.com  Fri Feb 11 05:44:51 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 11 Feb 2005 02:44:51 -0800
Subject: Python in Makefile Question
References: <MK-dnXqPBfzkHZHfRVn-qw@adelphia.com>
Message-ID: <1108118691.412169.127760@l41g2000cwc.googlegroups.com>

Efrat Regev wrote:
> Hello,
>
>     I'd like to ask a question concerning a python script in a
makefile.
> Suppose I have a C++ project (sorry for raising this in a Python
newsgroup),
> with some makefile for it. Before compiling the code, I'd like to
check that
> there are no C++ convention violations (e.g., identifiers beginning
with an
> underscore). So my makefile looks something like this:
>
> target: ...
>     verify.py
>     $(CC) ...
>
> verify.py is a python script that checks for convention violations,
i.e.,
> its first line is
>
> #! /usr/bin/env python
>
> I can't figure out the following:
> 1. How can I get the python script to return a value to make, so that
if it
> decides that there are convention violations make will fail?

raise SystemExit(1)

> 2. How can I pass information from the makefile to the python script,
e.g.,
> the base directory to check?

Use command-line arguments.  The Python equivalent of "argv" is
"sys.argv".



From ilias at lazaridis.com  Sun Feb  6 09:34:05 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sun, 06 Feb 2005 16:34:05 +0200
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
In-Reply-To: <mailman.1999.1107644058.22381.python-list@python.org>
References: <ctsjmg$75p$1@usenet.otenet.gr><pan.2005.02.03.19.10.39.349763@jerf.org>	<cu2m3q$km1$1@usenet.otenet.gr>
	<mailman.1999.1107644058.22381.python-list@python.org>
Message-ID: <cu59sr$rqm$1@usenet.otenet.gr>

> "Ilias Lazaridis" <ilias at lazaridis.com> wrote in message 
[...]
>>I want to add metadata to everything within my design (functions, data,
>>classes, ...), if possible with a standard way.
[...]
>>I want to generate things (code, txt, html etc.) out of my object-model,
>> whilst using with a flexible generator, if possible a standard one.

Example: ArcheTypes, autogeneration of forms and pages

"The creation of a new Type using Archetypes involves a main text file 
(python) that defines the fields and other objects within your type, 
their properties, and their behavior. Archetypes uses this information 
to auto generate on demand all forms and pages needed to add, edit, and 
view your types data. When you have written this file, you then have a 
product that you would install just like any other CMF/Plone product."

source: http://plone.org/documentation/archetypes/

-

Archetype is defined within a python file.

Does this include  metadata?

If yes: in a standard way (e.g. usable in other developments, too)?

Archetypes uses a generator.

Is this a standard generator (thus I don't have to learn/use another one 
in another context)?

.


-- 
http://lazaridis.com


From snail at objmedia.demon.co.uk  Wed Feb 23 17:25:10 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Wed, 23 Feb 2005 22:25:10 +0000
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cvaoft$av6$1@usenet.otenet.gr>
	<874qg6937w.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<cvcv9b$nbm$1@usenet.otenet.gr> <37uk2kF5gv38bU1@individual.net>
	<nmSSd.25321$Am3.782245@news20.bellglobal.com>
	<cvi2c5$ibu$1@usenet.otenet.gr> <421c91c8$0$44647$a1866201@visi.com>
	<cvi5s1$4l5$1@usenet.otenet.gr> <383qkkF5k6rf4U1@individual.net>
	<8BIQdyL$iLHCFw9a@objmedia.demon.co.uk>
	<421CC14A.4050708@lazaridis.com>
Message-ID: <fI2I$ZDGLQHCFwod@objmedia.demon.co.uk>

In message <421CC14A.4050708 at lazaridis.com>, Ilias Lazaridis 
<ilias at lazaridis.com> writes
>Stephen Kellett wrote:
>[...]
>> Who's Guido?
>
>Guido is the one, who should care by time about the status of the 
>python-community.

Who is care by time?
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From rkern at ucsd.edu  Mon Feb  7 21:38:32 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 07 Feb 2005 18:38:32 -0800
Subject: Big development in the GUI realm
In-Reply-To: <4208237b$0$21623$a1866201@visi.com>
References: <mailman.2123.1107820051.22381.python-list@python.org>
	<4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com>
	<cu95nd$7cr$1@news1.ucsd.edu>
	<6h7g0113up1v76k7qkad7bt17os1q73510@4ax.com>
	<4208237b$0$21623$a1866201@visi.com>
Message-ID: <cu98n4$833$1@news1.ucsd.edu>

Grant Edwards wrote:

> Spare us your clueless, junior-high legal analyses 

[etc.]

Hey! There's no need for name-calling. This is a tricky legal area that 
can be very confusing even to the most legal-minded of us. While I think 
"Luke" is incorrect in several respects and is somewhat uninformed about 
others, he doesn't deserve this vitriol.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From aahz at pythoncraft.com  Wed Feb 16 14:47:16 2005
From: aahz at pythoncraft.com (Aahz)
Date: 16 Feb 2005 14:47:16 -0500
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net>
	<111773qkev2r045@corp.supernews.com>
	<mailman.2716.1108582538.22381.python-list@python.org>
Message-ID: <cv0804$hul$1@panix1.panix.com>

In article <mailman.2716.1108582538.22381.python-list at python.org>,
Fredrik Lundh <fredrik at pythonware.com> wrote:
>
>I've proposed adding a "join" built-in that knows about the available
>string types, and does the right thing for non-string objects.
>unfortunately, the current crop of py-dev:ers don't seem to use strings
>much, so they prioritized really important stuff like sum() and
>reversed() instead...

You know where the patch tracker is....  ;-)
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From http  Fri Feb  4 01:09:49 2005
From: http (Paul Rubin)
Date: 03 Feb 2005 22:09:49 -0800
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<opslnkqsjo6yt6e7@news.cisco.com>
	<7xhdktt36q.fsf@ruckus.brouhaha.com>
	<opslnr3rbs6yt6e7@news.cisco.com>
Message-ID: <7xacqkc0uq.fsf@ruckus.brouhaha.com>

aurora <aurora00 at gmail.com> writes:
> I'm lost. So what do you compares against when you said LAMP is slow?
> What  is the reference point? Is it just a general observation that
> slashdot is  slower than we like it to be?

Yes, that's the basic observation, not specifically Slashdot but for
lots of LAMP sites (some PHPBB sites are other examples) have the same
behavior.  You send a url and the server has to grind for quite a
while coming up with the page, even though it's pretty obvious what
kinds of dynamic stuff it needs to find.  Just taking a naive approach
with no databases but just doing everything with in-memory structures
(better not ever crash!) would make me expect a radically faster site.
For a site like Slashdot, which gets maybe 10 MB of comments a day,
keeping them all in RAM isn't excessive.  (You'd also dump them
serially to a log file, no seeking or index overhead as this happened.
On server restart you'd just read the log file back into ram).

> If you mean MySQL or SQL database in general is slow, there are truth
> in  it. The best thing about SQL database is concurrent access,
> transactional  semantics and versatile querying. Turns out a lot of
> application can  really live without that. If you can rearchitect the
> application using  flat files instead of database it can often be a
> big bloom.

This is the kind of answer I had in mind.

> A lot of these is just implementation. Find the right tool and the
> right design for the job. I still don't see a case that LAMP based
> solution is inherently slow.

I don't mean LAMP is inherently slow, I just mean that a lot of
existing LAMP sites are observably slow.


From ark at acm.org  Mon Feb 21 16:16:12 2005
From: ark at acm.org (Andrew Koenig)
Date: Mon, 21 Feb 2005 21:16:12 GMT
Subject: iterative lambda construction
References: <1109018810.652908.93840@f14g2000cwb.googlegroups.com>
Message-ID: <vcsSd.256520$w62.221096@bgtnsc05-news.ops.worldnet.att.net>

"markscottwright" <markscottwright at gmail.com> wrote in message 
news:1109018810.652908.93840 at f14g2000cwb.googlegroups.com...
> Just for the hell of it, I've been going through the old Scheme-based
> textbook "Structure and Interpretation of Computer Programs" and seeing
> what I can and can't do with python.  I'm trying to create a function
> that returns the function (not the results of the function, but a
> function object) that results from applying function f to it's (single)
> argument N times.  For example, if you have "def sq(x): return x*x",
> then repeated(sq, 2)(2) = 16, repeated(sq, 3)(2) = 256, etc.
>
> I can do it recursively, like this:
>
> def repeated(f, count):
>   if count == 1:
>       return f
>   else:
>       return lambda x: f(repeated(f, count - 1)(x)
>
> But when I try to do it iteratively, it just hangs when I try to
> evaluate the results (for count > 1):
>
> def repeated2(f, count):
>    newfun = f
>    for i in range(count-1):
>        newfun = lambda x: newfun(f(x))
>    return newfun

The trouble is that Python's scoping rules are subtly different from 
Schemes, so you're binding to the wrong instance of newfun.  You should do 
this:

    def repeated2(f, count):
        newfun = f
        for i in range(count-1):
            newfun = lambda x, g=newfun: g(f(x))
        return newfun

Alternatively, you could do it this way:

    def repeated3(f, count):
        def g(x):
            for i in range(count):
                x = f(x)
            return x
        return g




From brent.hughes at comcast.net  Mon Feb  7 01:59:32 2005
From: brent.hughes at comcast.net (Brent W. Hughes)
Date: Sun, 6 Feb 2005 23:59:32 -0700
Subject: WYSIWYG wxPython "IDE"....?
References: <1107560658.584623.303310@o13g2000cwo.googlegroups.com>
	<4205fcd9@news.highway1.com.au>
	<1107751731.066796.295170@g14g2000cwa.googlegroups.com>
Message-ID: <XcCdnVNCYYxOjJrfRVn-vw@comcast.com>

I've also tried Boa Constructor a couple of times and keep having problems 
using it.  So I've got it stuck in the back of my mind for when it finally 
becomes ready for prime time.  (One of the problems was that the tutorial 
didn't quite match the program.)  I really like the concept.  It's a lot 
like Delphi, and I LOVE Delphi.  So one of these days I hope to love Boa 
Constructor for when I need to write GUI apps.

Brent




From irmen.NOSPAM at xs4all.nl  Wed Feb  2 18:23:08 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Thu, 03 Feb 2005 00:23:08 +0100
Subject: Getting a module's byte code, how?
In-Reply-To: <42015C0F.7040803@holdenweb.com>
References: <42014e25$0$28975$e4fe514c@news.xs4all.nl>
	<pan.2005.02.02.22.06.22.395829@freelance-developer.com>
	<CxcMd.102641$Jk5.35575@lakeread01>
	<42015854$0$28986$e4fe514c@news.xs4all.nl>
	<42015C0F.7040803@holdenweb.com>
Message-ID: <420160dc$0$28987$e4fe514c@news.xs4all.nl>

Steve Holden wrote:

>> But I also want the bytecode of modules that don't have a .pyc file,
>> possibly because they have already been 'dynamically' loaded from
>> another bytecode string ;-)
>>
> Aah, right, I suspect in these cases (which *are* pretty far from the 
> ordinary run of things) you'd sometimes be up the creek without a paddle.

I was afraid of that.
The whole mobile code stuff in Pyro is very powerful, for the
cases where it works and makes sense, I think.
However it is also fairly messy.
In the end perhaps it introduces more problems than it solves,
but its really nice to see it work for the simple cases :)


>> I want them! :-)
>>
> Well I'm afraid there's no guarantee that they haven't already been 
> garbage collected, and stamping your foot isn't going to do any good :-)

Heh, that was funny :D

> A pleasure. Thanks for Pyro! (and thanks for reminding me indirectly 
> that I need to guard that execution of hte module's code against 
> exceptions).

Pyro happily throws these exceptions in your face.
Like I said, rather messy.

--Irmen


From jicman at gmail.com  Wed Feb  9 12:45:33 2005
From: jicman at gmail.com (jicman)
Date: 9 Feb 2005 09:45:33 -0800
Subject: Java Integer.ParseInt translation to python
In-Reply-To: <slrnd0jnmm.l3u.nick@irishsea.home.craig-wood.com>
References: <008d01c507f4$451d9b30$2820790d@stso.xcdg.xerox.com>
	<372a762405013116263a4e93b7@mail.gmail.com>
	<mailman.2222.1107909486.22381.python-list@python.org>
	<slrnd0jnmm.l3u.nick@irishsea.home.craig-wood.com>
Message-ID: <1107971133.023128.205480@o13g2000cwo.googlegroups.com>

Nick Craig-Wood wrote:
> When I try your code I get this...
...
[clip]
...
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "<stdin>", line 4, in PrepareHash
> TypeError: 'str' object is not callable
> >>>
>
> You cant do byte(int(byte,16)) - byte is a string!  So you haven't
> posted the actual code you ran...

you're right... What I ran was this:

def PrepareHash(HashStr):
  while len(HashStr) > 0:
    byte = HashStr[0:2]
    print byte,int(byte,16),chr(int(byte,16)) # & 0xff
    HashStr = HashStr[2:]
  return byte

def Main():
  HashStr = "c17ce186ab94eeb0de8ae3b5b751a7c4d8e9edeb"
  HashStr = PrepareHash(HashStr)
  print "Prepared HashStr :",HashStr

Main()


> Java bytes are signed also just to add to the confusion.

Exactly... which is the problem.  I don't know what the heck the [byte]
in front of a variable does.  I may have to get into the java list.
YUK!

thanks.

jos?



From steve at holdenweb.com  Mon Feb  7 16:24:16 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 07 Feb 2005 16:24:16 -0500
Subject: Big development in the GUI realm
In-Reply-To: <5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
Message-ID: <s5RNd.104904$Jk5.38565@lakeread01>

Luke Skywalker wrote:

> On Mon, 7 Feb 2005 18:30:18 +0100, Michael Goettsche.
> <mail at tuxipuxi.org> wrote:
> 
>>Not 100% right. Only drivers for commercial databases will not be included, 
>>mysql and co. are available.
> 
> 
> What I find weird, is that I always understood the GPL meaning that
> you must give back any contribution you made to the source code of the
> GPLed code, but not if you're just using either a binary distribution
> (eg. a DLL) or if you copy/pasted the code as is, with no changes on
> your own.
> 
> If this is true, then the fact that Qt is now GPLed for Windows means
> that I should be able to use this widget set even in commercial apps
> since I'm not making any change to Qt, just using it.
> 
> Am I totally off-target?
> 
Yes.

The GPL only dictates what you *must* do when you re-distribute GPL'd 
code, or code derived from GPL'd code - and there's substantial room for 
disagreement about what is and what is';t a derived product, with a 
recent opinion suggesting that the FSF would regard importing a GPL'd 
Python module as making your Python program constitute a "derived product".

As long as you don't redistribute anything you are free to do whatever 
you want with GPL'd code. The intent of the license is essentially to 
stop proprietary freeloaders from benefiting from GPL'd code without 
giving anything back to the community. Microsoft choose to call this 
"viral", but as usual they are talking out of their wallet.

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From henryho at NO__SPAMM_.telus.net  Tue Feb 15 05:02:12 2005
From: henryho at NO__SPAMM_.telus.net (fanbanlo)
Date: Tue, 15 Feb 2005 10:02:12 GMT
Subject: os.rename() doesn't work w/unicode??
In-Reply-To: <cus335$2p0$1@news.comcor-tv.ru>
References: <UtfQd.58964$L_3.26017@clgrps13> <cus335$2p0$1@news.comcor-tv.ru>
Message-ID: <EMjQd.43504$K54.24414@edtnps84>

Serge Orlov wrote:
> fanbanlo wrote:
> 
>>C:\MP3\001.txt -> 0.txt
>>C:\MP3\01. ??? - ????(???).mp3 -> 1.mp3
>>
>>Traceback (most recent call last):
>>  File
>>"C:\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
>>line 310, in RunScript
>>    exec codeObject in __main__.__dict__
>>  File "C:\MP3\!RenameNum.py", line 40, in ?
>>    renameFiles(os.path.dirname(sys.argv[0]))
>>  File "C:\MP3\!RenameNum.py", line 26, in renameFiles
>>    os.rename(os.path.join(path, filenames), new_filename)
>>OSError: [Errno 22] Invalid argument
> 
> 
> os.rename works with unicode, you're getting this error because
> question marks are not allowed in file names on Windows.
> 
>   Serge.
> 
> 
The filename is supposed to be in Chinese, on NTFS (WinXP).  However, 
when i print it, they are all '???', and that caused os.rename() to break.

How to force os.walk to return a list of unicode filename?


From jzgoda at gazeta.usun.pl  Fri Feb 11 15:44:39 2005
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Fri, 11 Feb 2005 21:44:39 +0100
Subject: PyQt documentation
In-Reply-To: <cuj2b4$h9d$1@news.vcd.hp.com>
References: <1108088253.552834.44690@z14g2000cwz.googlegroups.com>
	<cuj2b4$h9d$1@news.vcd.hp.com>
Message-ID: <cuj5nq$2oi$1@nemesis.news.tpi.pl>

djw napisa?(a):

> 6. Convert QStrings with str() from Qt functions/methods if you want to 
> work with them with std. Python string functions

No, no, no, don't do it, don't use str()! Your python will choke in any 
non-ascii character! Use unicode objects and you will be safe from those 
non-anglosaxons who use all these rubbish european characters such as 
umlauts, cedillas, ogoneks and so on.

-- 
Jarek Zgoda
http://jpa.berlios.de/ | http://www.zgodowie.org/


From steve at holdenweb.com  Wed Feb  2 10:25:19 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 02 Feb 2005 10:25:19 -0500
Subject: Hey, get this!
In-Reply-To: <s9z4qgvrpaj.fsf@salmakis.intevation.de>
References: <mailman.1509.1106923923.22381.python-list@python.org>
	<ctdlpq$ukf$00$1@news.t-online.com>
	<k%WKd.98003$Jk5.87621@lakeread01> <4200E5CB.6020508@holdenweb.com>
	<s9z4qgvrpaj.fsf@salmakis.intevation.de>
Message-ID: <4200F0DF.9070204@holdenweb.com>

Bernhard Herzog wrote:

> Steve Holden <steve at holdenweb.com> writes:
> 
> 
>>What *I* would like to know is: who is allowing the import of bsddb.os,
>>thereby somehow causing the code of the os library module to be run a
>>second time.
> 
> 
> I would guess (without actually running the code) that this part is
> responsible:
> 
> 
>>         if package:
>>             module.__path__ = sys.path
> 
> 
> You usually should initialize a package's __path__ to an empty list.
> The __init__ module will take care of modifying it if necessary.
> 
>    Bernhard
> 
Thanks, Bernhard, that appeared to fix the problem. The error certainly 
went away, anyway ... now I can do more experimentation.

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005          http://www.python.org/pycon/2005/
Steve Holden                           http://www.holdenweb.com/


From administrata at hotmail.com  Thu Feb 10 11:44:24 2005
From: administrata at hotmail.com (administrata)
Date: 10 Feb 2005 08:44:24 -0800
Subject: [noob] Questions about mathematical signs...
References: <614c778e.0502061226.5f40244c@posting.google.com>
	<v0wNd.104851$Jk5.6276@lakeread01>
Message-ID: <614c778e.0502100844.319842d5@posting.google.com>

Steve Holden <steve at holdenweb.com> wrote in message news:<v0wNd.104851$Jk5.6276 at lakeread01>...
> administrata wrote:
> 
> > Hi! I'm programming maths programs.
> > And I got some questions about mathematical signs.
> > 
> > 1. Inputing suqare like a * a, It's too long when I do time-consuming
> >    things. Can it be simplified?
> > 
> You mean you have to write a*a*a*a when you want the fourth power? You 
> need the exponentiation operator ** :
> 
>   >>> for i in range(6):
>   ...   print 2 ** i
>   ...
> 1
> 2
> 4
> 8
> 16
> 32
> 
> > 2. Inputing fractions like (a / b) + (c / d), It's tiring work too.
> >    Can it be simplified?
> > 
> Surely you jest. Can you suggest a simplification, or have you come 
> across one in some other language?
> 
> > 3. How can i input root?
> > 
> Fractional exponents give you roots (sorry about the tiring division):
> 
>   >>> for i in range(1,7):
>   ...   print i, 64 ** (1.0/i)
>   ...
> 1 64.0
> 2 8.0
> 3 4.0
> 4 2.82842712475
> 5 2.29739670999
> 6 2.0
> 
> > thx 4 reading :)
> 
> regards
>   Steve

Helpful! :)


From tonino.greco at gmail.com  Tue Feb 15 02:02:15 2005
From: tonino.greco at gmail.com (Tonino)
Date: 14 Feb 2005 23:02:15 -0800
Subject: gui scripting
References: <1108381881.828494.98340@c13g2000cwb.googlegroups.com>
	<gm27e2-m6i.ln1@lairds.us>
Message-ID: <1108450935.501630.62770@l41g2000cwc.googlegroups.com>

hmm - there is a problem - Android uses Xtest extensions - this is BAD
;)

I Need to be able to get values from the form that is returned ... and
the Xtest stuff does not allow you to access the values of a returned
form in the GUI ...

example :

if the GUI has a form that is returned and in this form it has columns
on the left expressing names for values on the right - you cannot get
the text for the columns on the left or the associated values ...

Thanks



From mhartl at post.harvard.edu  Sun Feb 13 22:39:39 2005
From: mhartl at post.harvard.edu (Michael Hartl)
Date: 13 Feb 2005 19:39:39 -0800
Subject: Newbie help
References: <lvUPd.10137$pE1.923@bignews3.bellsouth.net>
	<1108352018.381002.167260@o13g2000cwo.googlegroups.com>
Message-ID: <1108352379.334089.148510@f14g2000cwb.googlegroups.com>

Sorry about the code: Google Groups screwed up the formatting, but I
hope you get the picture.



From jfj at freemail.gr  Mon Feb 14 22:25:18 2005
From: jfj at freemail.gr (jfj)
Date: Mon, 14 Feb 2005 19:25:18 -0800
Subject: [newbie] Confused with raise w/o args
In-Reply-To: <mailman.2528.1108386979.22381.python-list@python.org>
References: <mailman.2523.1108381045.22381.python-list@python.org>	<421128EC.5080108@freemail.gr>
	<mailman.2528.1108386979.22381.python-list@python.org>
Message-ID: <42116B9E.6090101@freemail.gr>

Fredrik Lundh wrote:

> "jfj" <jfj at freemail.gr> wrote:
> 
> 
>>Wait! second that. We would like to
> 
> 
> hmm.  are you seconding yourself, and refering to you and yourself as we?
> 

:)
"we" refers to all python users.

> no.  your foo() function raises B, and is called from the exception
> handler in b1.  exception handlers are free to raise new exceptions
> at any time.

Yes but 'B' has been handled while the handler of 'A' has not finished yet.
Here is a better example:
##################
# comment out one of the two
# raise statements to test this
import traceback
def foo():
     raise     # this raises an 'A'
     try:
        raise B
     except:
        pass
     raise     # this raises a 'B'. I find this peculiar

try:
  try:
     raise A
  except:
     foo()
except:
  traceback.print_exc()
##################


It seems that there are no uses of this "feature".
I guess that's the easy way to implement re-raise in CPython.

I quickly grepped through the sources (;)) and it seems that
perhaps it would be possible to introduce a new opcode
JUMP_FORWARD_CLEANUP_EXC which would be used to leave except clauses.
Then, RAISE_VARARGS would push exceptions on to an "exception stack"
and JUMP_FORWARD_CLEANUP_EXC would pop them.
The bottom element in such an exception stack would be the
UnhandledException.  're-raise' would use the stack-top exception.

However, there are no bytecode changes until AST is merged, so this
will have to wait..


jfj



From mefjr75 at hotmail.com  Mon Feb  7 21:09:02 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 7 Feb 2005 18:09:02 -0800
Subject: def __init__ question in a class definition
References: <mailman.2048.1107750192.22381.python-list@python.org>
	<1107754489.980148.277690@c13g2000cwb.googlegroups.com>
	<42076939.6020405@holdenweb.com>
Message-ID: <1107828542.466555.27160@o13g2000cwo.googlegroups.com>

Steve Holden wrote:
> M.E.Farmer wrote:
>
> >>Jeffrey Borkent
> >>Systems Specialist
> >>Information Technology Services
> >
> >
> > With that kind of credentials, and the fact that you claim you are
a
> > system specialists....
> > I don't know you have me worried already.
> > I guess for you I just say RTFM.
> > If you think that is harsh then don't ask a 2nd grade question yet
> > claim/pretend to be some sorta system specialists.
>
> Hey, ease up, this is comp.lang.python, remember.
>
> > You tried searching the archives first I am sure.
> > Go here  http://www.python.org and *read*, come back when you are
> > really stuck.
> > M.E.Farmer
> > P.S. YES the __ matter, they identify special methods ! __init__ is
the
> > class CONSTRUCTOR.
> >
> Next time, could we try exchanging the body of the message and the
PS?
> That way you could have omitted the PS when you got half way through
it
> and realised you were just wasting your time and everyone else's ...
>
> got-out-the-wrong-side-of-bed-ly y'rs  - steve
> --
> Meet the Python developers and your c.l.py favorites March 23-25
> Come to PyCon DC 2005                      http://www.pycon.org/
> Steve Holden                           http://www.holdenwewb.com
P.S. And in an effort to keep on topic...PYCON!!
steve,
I stand by what I said.
Teach a man to fish feed him for a lifetime.
Re-read it, memorize it, and keep it near.
I read comp.lang.py for 3 years before I posted anything, and then i
posted an ANSWER!
I don't go around asking dirt simple questions that would be solved
with a quick read of the docs, usenet archives , Google, books that
have been written about Python,etc.... He should have been *reading*
not *posting*.
I can not understand why you have a problem with me pointing out he
should read the documentation. Why do you think RTFM exist, for people
like that, they are a timesink. He can redeem himself if he just goes
and reads a little and comes back looking like he made some effort.
This guy has a 6 mile sig that says he ought to know better. Had he
come with a different sig *maybe* and a question that did not scream
'''HEY I WANT YOU TO ANSWER EVERYTHING FOR ME BECAUSE I CAN NOT EVEN
READ THE BASIC DOCUMENTATION ON MY OWN'''.

> Next time, could we try exchanging the body of the message and the
PS?
> That way you could have omitted the PS when you got half way through
it
> and realised you were just wasting your time and everyone else's ...

I tell him where he is wrong first then I answer the question, sounds
like *YOU* ....Now I have your attention.
What do you think that post was meant to do? Snap him off at the root?
Make him cry? Maybe it was to nudge him to read the docs, so he can
*learn* on his own.
Next time you could just write my post for me! That way I can only
waste as much time as you deem acceptable! Now that I think about it,
if we just answer every question every poster has about any detail of
Python, then we can all sing along and hold hands, who needs to write
documentation or even books about Python look at all the time we will
save...

> got-out-the-wrong-side-of-bed-ly y'rs  - steve
Which-side is-the wrong-side-ly yr's - M.E.Farmer



From lbates at syscononline.com  Mon Feb 28 19:48:39 2005
From: lbates at syscononline.com (Larry Bates)
Date: Mon, 28 Feb 2005 18:48:39 -0600
Subject: ZoDB's capabilities
In-Reply-To: <d00640$1o6o$1@news.vol.cz>
References: <d00640$1o6o$1@news.vol.cz>
Message-ID: <SdOdnSrOKuxBJr7fRVn-qQ@comcast.com>

There is a VERY large website that uses Zope/ZODB that takes up to
9000 hits per second when it gets busy.  ZODB is very fast and
holds up well under load.

You should probably look at Plone.  It is CMS already built on
top of Zope.  Might safe you a LOT of work.

Larry Bates


Almad wrote:
> Hello, 
> 
> I'm going to write a custom CMS. I'd like to use some odbms, as code is then
> much more cleaner...however, i'm a little bit scared about capabilities of
> ZoDB, when compared with f. e. Firebird. 
> How much instances is Zodb able to handle? Under "handle" I mean "in real
> time", not "theoretically". I'd like to use it for dynamic portal with
> about 2000 - 3000 UIP / day. 
> 
> And, how is it with stability and crash recovery? I can't find some more
> sources about zodb, when there are some other sources then those on Zope,
> please tell me. Or, please tell me if you knew some better odbms engine ^_^
> 
> Thanks, 


From darragh.sherwin at gmail.com  Wed Feb 23 10:31:42 2005
From: darragh.sherwin at gmail.com (Darragh Sherwin)
Date: Wed, 23 Feb 2005 15:31:42 +0000
Subject: [OT] [Job] Open Python/Zope/Plone Positions in Ireland
In-Reply-To: <8abf170205022307173c810376@mail.gmail.com>
References: <8abf170205022307173c810376@mail.gmail.com>
Message-ID: <8abf170205022307314a6e7e88@mail.gmail.com>

Propylon is looking to recruit people with Python or Zope experience
for several projects that we are involved in.

We are seeking candidates with varying amount of experience in Python
and all who are interested in learning in Python are encouraged to apply
for the positions.

Experience with Zope or Plone is an advantage but not necessary.

For more information on Propylon, please visit http://www.propylon.com .

All positions would be in our Irish office in Dublin.

All candidates would have to be eligible to work in the EU and have the 
appropriate visas, etc.

If you or anyone you know is interested, please forward a CV,
preferably in the OpenOffice.org or RTF format to both
darragh.sherwin at propylon.com and martin.mangan at propylon.com

Regards,
--
Darragh Sherwin
PWB Implementations Manager
http://www.propylon.com/ solutions/parliament/index.html
+353-1-4927456
+353-87-1204654


From apardon at forel.vub.ac.be  Wed Feb  9 06:41:45 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 9 Feb 2005 11:41:45 GMT
Subject: strange behaviour with decorators.
References: <slrnd0jpc6.26q.apardon@rcpc42.vub.ac.be>
	<36u7udF57ljlhU1@individual.net>
Message-ID: <slrnd0jtnn.26q.apardon@rcpc42.vub.ac.be>

Op 2005-02-09, Diez B. Roggisch schreef <deetsNOSPAM at web.de>:
>> Now although this behaviour was surprising after somethought
>> I think I may understand why things go wrong, but I certainly
>> don't understand the result I got. I would think an error like:
>> 
>> TypeError: call() takes exactly 2 arguments (1 given)
>> 
>> would have been more appropiate.
>> 
>> 
>> Am I missing something?
>> Is it a bug?
>> Maybe both?
>
> Maybe I'm missing something - but I exactly get that error if I don't use
> that try: except: of yours:

Ah, yes, the penny dropped. The try: except where there because
originally there were other statements I wanted to test and I
didn't want the raise exception by the inc(-2) stop the script.
I completely forget to consider it would also catch the
error I was expecting.

Thanks.

-- 
Antoon Pardon


From just at xs4all.nl  Sun Feb 27 05:10:31 2005
From: just at xs4all.nl (Just)
Date: Sun, 27 Feb 2005 11:10:31 +0100
Subject: any Python equivalent of Math::Polynomial::Solve?
References: <just-420C1F.16423926022005@news1.news.xs4all.nl>
	<1109485184.587035.176540@l41g2000cwc.googlegroups.com>
Message-ID: <just-5C6FB9.11103127022005@news1.news.xs4all.nl>

In article <1109485184.587035.176540 at l41g2000cwc.googlegroups.com>,
 "Carl Banks" <invalidemail at aerojockey.com> wrote:

> Just wrote:
> > While googling for a non-linear equation solver, I found
> > Math::Polynomial::Solve in CPAN. It seems a great little module,
> except
> > it's not Python... I'm especially looking for its poly_root()
> > functionality (which solves arbitrary polynomials). Does anyone know
> of
> > a Python module/package that implements that?
> 
> If you don't have a great need for speed, you can accomplish this
> easily with the linear algebra module of Numeric/numarray.   Suppose
> your quintic polynomial's in the form
> 
>    a + b*x + c*x**2 + d*x**3 + e*x**4 + x**5
> 
> The roots of it are equal to the eigenvalues of the companion matrix:
> 
>   0   1   0   0   0
>   0   0   1   0   0
>   0   0   0   1   0
>   0   0   0   0   1
>  -a  -b  -c  -d  -e
> 
> It should be pretty easy to set up a Numeric matrix and call
> LinearAlgebra.eigenvalues.  For example, here is a simple quintic
> solver:
> 
> . from Numeric import *
> . from LinearAlgebra import *
> .
> . def quinticroots(p):
> .     cm = zeros((5,5),Float32)
> .     cm[0,1] = cm[1,2] = cm[2,3] = cm[3,4] = 1.0
> .     cm[4,0] = -p[0]
> .     cm[4,1] = -p[1]
> .     cm[4,2] = -p[2]
> .     cm[4,3] = -p[3]
> .     cm[4,4] = -p[4]
> .     return eigenvalues(cm)
> 
> 
> now-you-can-find-all-five-Lagrange-points-ly yr's,

Wow, THANKS. This was the answer I was secretly hoping for... "Great 
need for speed", no, not really, but this Numeric-based version is about 
9 times faster than what I translated from Perl code yesterday, so from 
where I'm standing your version is blazingly fast...

Thanks again,

Just


From lkoski at sandisk.com  Tue Feb 22 04:46:25 2005
From: lkoski at sandisk.com (Liat Koski)
Date: Tue, 22 Feb 2005 01:46:25 -0800
Subject: pydoc documentation
Message-ID: <5A581EC513B13048BE69A41625506074592854@ilex1.sandisk.local>


> 
> 
> Hellow all,
> 
> I need to use pydoc mosule in order to get documentation to programs i made
> I can't find a good source explaning how to use this module
> I work on linux OS but this documentation can be made also on my windows OS
> If anyone knows how to use it, and maybe has some source code he wrote using this module,
> I'll be glade to use this help
> 
> Thanks in advanced
> 
> Liat


From snail at objmedia.demon.co.uk  Sun Feb  6 06:46:25 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Sun, 6 Feb 2005 11:46:25 +0000
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
References: <ctsjmg$75p$1@usenet.otenet.gr>
	<pan.2005.02.03.19.10.39.349763@jerf.org>
	<cu2m3q$km1$1@usenet.otenet.gr>
	<mailman.1999.1107644058.22381.python-list@python.org>
	<cu4ahl$a0s$1@usenet.otenet.gr>
	<mailman.2015.1107678627.22381.python-list@python.org>
	<cu4p2e$edq$1@usenet.otenet.gr>
Message-ID: <IIFNPRCROgBCFw7W@objmedia.demon.co.uk>

In message <cu4p2e$edq$1 at usenet.otenet.gr>, Ilias Lazaridis 
<ilias at lazaridis.com> writes
>Can one please point me to a downloadable version of the 2 reference 
>manuals (did not found them)?

Well, there is an obvious website address to visit and you can see the 
word "documentation" on that website without scrolling.

Use Google or a different search engine to find the obvious website.

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From essai1 at mci.local  Sun Feb 13 03:27:11 2005
From: essai1 at mci.local (News M Claveau /Hamster-P)
Date: Sun, 13 Feb 2005 09:27:11 +0100
Subject: writing unicode apps in python - some beginner questions.
References: <hEAPd.12154$504.1040055@news20.bellglobal.com>
Message-ID: <420f0f7c$0$807$8fcfb975@news.wanadoo.fr>

Hi!

XP unicode view depend, also, of the uniscribe motor version. The last 
version come with SP-2.
Other element : is the font "Arial Unicode MS" installed ?

@-salutations
-- 
Michel Claveau




From martin at v.loewis.de  Wed Feb 23 15:45:27 2005
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Wed, 23 Feb 2005 21:45:27 +0100
Subject: unicode(obj, errors='foo') raises TypeError - bug?
In-Reply-To: <_vOdnZ_efPnIM4HfRVn-qQ@comcast.com>
References: <mailman.2958.1109141791.22381.python-list@python.org>
	<ydWdndBX1-sXrYHfRVn-vQ@comcast.com>
	<421c786a$1_1@newspeer2.tds.net>
	<_vOdnZ_efPnIM4HfRVn-qQ@comcast.com>
Message-ID: <421ceb68$0$7105$9b622d9e@news.freenet.de>

Steven Bethard wrote:
> Yeah, I agree it's weird.  I suspect if someone supplied a patch for 
> this behavior it would be accepted -- I don't think this should break 
> backwards compatibility (much).

Notice that the "right" thing to do would be to pass encoding and errors
to __unicode__. If the string object needs to be told what encoding it
is in, why not any other other object as well?

Unfortunately, this apparently was overlooked, and now it is too late
to change it (or else the existing __unicode__ methods would all break
if they suddenly get an encoding argument).

As for using encoding and errors on the result of str() conversion
of the object: how can the caller know what encoding the result of
str() is in, reasonably? It seems more correct to assume that the
str() result in in the system default encoding.

If you can follow so far(*): if it is the right thing to ignore the
encoding argument for the case that the object was str() converted,
why should the errors argument not be ignored? It is inconsistent
to ignore one parameter to the decoding but not the other.

Regards,
Martin

(*) I admit that the reasoning for ignoring the encoding is
somewhat flawed. There are some types (e.g. numbers) where
str() always uses the system encoding (i.e. ASCII - actually,
it always uses ASCII, no matter what the system encoding is).
There may be types where the encoding of the str() result
is not ASCII, and the caller happens to know what it is,
but I'm not aware of any such type.


From adam at eden.com  Tue Feb 15 16:22:43 2005
From: adam at eden.com (Adam)
Date: Tue, 15 Feb 2005 21:22:43 GMT
Subject: Font size
Message-ID: <42126822@news.comindico.com.au>

Please help me.
How do you clear the screen and then display a number with an enlarged font 
size (about 300).
Adam. 




From mahs at telcopartners.com  Wed Feb 16 20:15:42 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 16 Feb 2005 17:15:42 -0800
Subject: sampling items from a nested list
In-Reply-To: <7_adnQhRBYDdV47fRVn-sA@comcast.com>
References: <7_adnQhRBYDdV47fRVn-sA@comcast.com>
Message-ID: <cv0r2m$ebh$1@sea.gmane.org>

Steven Bethard wrote:
> So, I have a list of lists, where the items in each sublist are of 
> basically the same form.  It looks something like:
> 
...
> 
> Can anyone see a simpler way of doing this?
> 
> Steve

You just make these up to keep us amused, don't you? ;-)

If you don't need to preserve the ordering, would the following work?:

  >>> data = [[('a', 0),
  ...          ('b', 1),
  ...          ('c', 2)],
  ...
  ...         [('d', 2),
  ...          ('e', 0)],
  ...
  ...         [('f', 0),
  ...          ('g', 2),
  ...          ('h', 1),
  ...          ('i', 0),
  ...          ('j', 0)]]
  ...
  >>> def resample2(data):
  ...     bag = {}
  ...     random.shuffle(data)
  ...     return [[(item, label)
  ...                 for item, label in group
  ...                     if bag.setdefault(label,[]).append(item)
  ...                         or len(bag[label]) < 3]
  ...                            for group in data if not random.shuffle(group)]
  ...
  >>> resample2(data)
[[('a', 0), ('c', 2), ('b', 1)], [('h', 1), ('g', 2), ('i', 0)], []]
  >>> resample2(data)
[[('h', 1), ('f', 0), ('j', 0), ('g', 2)], [('b', 1), ('c', 2)], []]
  >>> resample2(data)
[[('e', 0), ('d', 2)], [('i', 0), ('h', 1), ('g', 2)], [('b', 1)]]
  >>>

Michael



From fuzzyman at gmail.com  Tue Feb 22 03:00:10 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 22 Feb 2005 00:00:10 -0800
Subject: functions and named keyword arguments
In-Reply-To: <37u1mcF5hu7ohU1@individual.net>
References: <1108987745.605901.75090@l41g2000cwc.googlegroups.com>
	<37u1mcF5hu7ohU1@individual.net>
Message-ID: <1109059210.665279.160690@o13g2000cwo.googlegroups.com>


Diez B. Roggisch wrote:
> > Sorry if this is a duplicate - I use the google interface and
sometiems
> > it screws up (not showing stuff you've posted *or* not posting it).
> > Before you ask it's because at work I have no NNTP and *heavily*
> > restricted http.
>
> It is - so I requote my answer :)
>
>
> Im not sure if I understand you fully, but if what you are after is
how to
> pass named parameters analog to positional args, do it as dict:
>
> def foo(name=None):
>     print name
>
> foo(**{name: "Fuzzy"})
>

Brilliant - that's exactly what I was looking for.... thanks.

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml

> -- 
> Regards,
> 
> Diez B. Roggisch



From pobrien at orbtech.com  Mon Feb 14 15:06:54 2005
From: pobrien at orbtech.com (Pat)
Date: 14 Feb 2005 12:06:54 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <jN8Xe7rj$PECFwHF@objmedia.demon.co.uk>
References: <cuo71l$gig$1@usenet.otenet.gr><cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr>
	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>
	<guLnmSj92OECFw0L@objmedia.demon.co.uk>
	<1108408914.405899.129990@o13g2000cwo.googlegroups.com>
	<jN8Xe7rj$PECFwHF@objmedia.demon.co.uk>
Message-ID: <1108411614.268293.61270@z14g2000cwz.googlegroups.com>

Stephen Kellett wrote:
> In message <1108408914.405899.129990 at o13g2000cwo.googlegroups.com>,
Pat
> <pobrien at orbtech.com> writes
> >That answers the cost question (assuming that your interpretation of
> >the licensing is correct, since I'm not a lawyer nor qualified to
> >render much of an opinion on that).  But there is still the issue of
> >going through a bunch of configuration hassle that scares me away
from
>
> What configuration hassle? Can't be any harder than specifying a
> different CRT surely?

I don't want to have to ask users of my code to have to go through
this:

http://www.vrplumber.com/programming/mstoolkit/

What I want is to provide everything a user would need within my own
Subversion repository.  Any C code would be compiled behind the scenes
using free tools that I'm able to include in my repository (without
having to hire a lawyer first).

Having to tell users that they need to download, install, and configure
all this additional compiler stuff is asking too much from my potential
user base, since I'm also targeting novices and developers from other
languages for whom C compiler stuff is going to be a barrier to entry.

I hope that makes sense.  :-)

--
Patrick K. O'Brien
Orbtech    http://www.orbtech.com
Schevo     http://www.schevo.org
Pypersyst  http://www.pypersyst.org



From snail at objmedia.demon.co.uk  Mon Feb 14 13:28:13 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Mon, 14 Feb 2005 18:28:13 +0000
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr>
	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>
Message-ID: <guLnmSj92OECFw0L@objmedia.demon.co.uk>

In message <1108398011.213872.321390 at o13g2000cwo.googlegroups.com>, Pat 
<pobrien at orbtech.com> writes
>Wow!  I must say, I'm less than impressed with the responses so far.  I
>know Ilias can give the impression that he is just trolling, but I can
>assure you he is not.  At least, not in this case.  ;-)

He deserves what he gets. He appears to put no effort in, other than to
o Write his own document for his own needs that no one else is 
interested in
o Answer people's comments to him in a way that does not demonstrate he 
has put any effort in.
o Based on his answers it seems pretty clear to me (and it seems many 
others) that he has not put any effort in and has no intention of doing 
so.

>In addition, there are some unresolved licensing questions concerning
>the .NET runtime file for extensions (msvcr71.dll):

To quote that URL;
<QUOTE>
The 2.4 python.org installer installs msvcr71.dll on the target system.

If someone uses py2exe or a similar tool to create a frozen application,
is he allowed to redistribute this msvcr71.dll to other users together
with his application or not, even if he doesn't own MSVC?
</END QUOTE>

msvcr71.dll is a redistributable for applications written using their 
compiler. You can redistribute that. If that answer is not good enough 
for you there is now a free version of Microsofts Visual Studio called 
Visual Studio Express (downloadable from the Microsoft's website). This 
DLL is (to my understanding) part of Visual Studio 7.1 and Visual Studio 
Express.

No licensing problem exists. Microsoft will not get upset about 
msvcr71.dll being distributed. They will if you distribute msvcr71d.dll 
though - don't do that!

I'm not a lawyer, so take this as you would any other free advice and 
download Visual Studio Express and read the redistribution sections in 
the license/help file to verify. Alternatively search msdn.microsoft.com 
for "redistributable".

Look at this from Microsoft's perspective - Python is a language that 
can be used on Windows operating systems. msvcr71.dll is required to 
make some versions of Python work. Microsoft are not stupid - they know 
that to encourage uptake of their OS they shouldn't put needless 
restrictions on certain technology - the C runtime being on of those 
technologies. It is in Microsoft's own best interests to allow 
msvcr71.dll to be used for Python.

>users.  I can't expect them to purchase a .NET compiler or go through a

See above.

Regards

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From lkirsh at cs.ubc.ca  Tue Feb  1 20:39:52 2005
From: lkirsh at cs.ubc.ca (Lowell Kirsh)
Date: Tue, 01 Feb 2005 17:39:52 -0800
Subject: how do i create such a thing?
In-Reply-To: <1graydy.kqcv8z136el9pN%aleaxit@yahoo.com>
References: <ctjl2u$2sc$1@mughi.cs.ubc.ca>
	<mailman.1605.1107124128.22381.python-list@python.org>
	<7vGdnTsopcKl-GDcRVn-rw@comcast.com>
	<1gr9b2q.1dlgnok1ayt2zsN%aleaxit@yahoo.com>
	<ctne9j$9jm$1@mughi.cs.ubc.ca>
	<1graydy.kqcv8z136el9pN%aleaxit@yahoo.com>
Message-ID: <ctpb18$qpr$1@mughi.cs.ubc.ca>

I'm not sure I get it. What's the purpose of using a delegate rather 
than having the object itself supply the return value?

Alex Martelli wrote:
> Lowell Kirsh <lkirsh at cs.ubc.ca> wrote:
> 
> 
>>What might these exceptions be?
>>
>>
>>>It's HIGHLY advisable to have your __getattr__ methods raise
>>>AttributeError for any requested name that starts and ends with double
>>>underscores, possibly with some specific and specifically designed
>>>exceptions.
> 
> 
> For example, delegation of such requests to some other object:
>     def __getattr__(self, name):
>         return getattr(self._delegate, name)
> 
> In such cases you may decide you do not need to block __specials__,
> because you're OK with having self._delegate supply them or be
> responsible to raise AttributeError if necessary.
> 
> 
> Alex


From firemoth at gmail.com  Wed Feb  2 21:47:31 2005
From: firemoth at gmail.com (Timothy Fitz)
Date: Wed, 2 Feb 2005 21:47:31 -0500
Subject: Python AST Sprint
Message-ID: <972ec5bd05020218477d5afaf1@mail.gmail.com>

I am interested in helping Python, however my knowledge of Abstract
Syntax Trees is lacking. Where should I turn to educate myself? Any
books or websites would be appreciated.


From Mark.English at liffe.com  Mon Feb 14 06:06:34 2005
From: Mark.English at liffe.com (Mark English)
Date: Mon, 14 Feb 2005 11:06:34 -0000
Subject: check if object is number
Message-ID: <40E605146701DE428FAF21286A97D309022FC96E@wphexa02.corp.lh.int>

Not sure if anyone's mentioned this yet, but just in case they haven't:
---- Start bit o' Python ----
>>> import operator
>>> operator.isNumberType(1)
True
>>> operator.isNumberType(1.01)
True
>>> operator.isNumberType('a')
False
>>> operator.isNumberType('1')
False
---- End bit o' Python ----
Haven't looked at the implementation (or the docs for a while) but for
everyday usage (not that I do this everyday) it's all the implementation
I need.


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From hans at zephyrfalcon.org  Sun Feb 13 13:19:03 2005
From: hans at zephyrfalcon.org (Hans Nowak)
Date: Sun, 13 Feb 2005 13:19:03 -0500
Subject: changing __call__ on demand
In-Reply-To: <cuo0e1$4l2$1@lnx107.hrz.tu-darmstadt.de>
References: <cuo0e1$4l2$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <tSMPd.263$7O6.88@fe61.usenetserver.com>

Stefan Behnel wrote:
> Hi!
> 
> This somewhat puzzles me:
> 
> Python 2.4 (#1, Feb  3 2005, 16:47:05)
> [GCC 3.3.4 (pre 3.3.5 20040809)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> 
> .>>> class test(object):
> ...   def __init__(self):
> ...     self.__call__ = self.__call1
> ...   def __call1(self):
> ...     print 1
> ...   def __call__(self):
> ...     print 2
> ...
> .>>> t = test()
> .>>> t()
> 2
> 
> If I take out the __call__ method completely and only set it in 
> __init__, I get a TypeError saying that test is not callable.

Note that it works just fine if you don't use a new-style class:

 >>> class Test:
...     def __init__(self):
...         self.__call__ = self.foobar
...     def foobar(self, *args, **kwargs):
...         print "Called with:", args, kwargs
...
 >>> t = Test()
 >>> t()
Called with: () {}
 >>> t(3, 4)
Called with: (3, 4) {}
 >>> t(42, x=0)
Called with: (42,) {'x': 0}

-- 
Hans Nowak
http://zephyrfalcon.org/



From bearophileHUGS at lycos.com  Wed Feb  2 07:54:32 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 2 Feb 2005 04:54:32 -0800
Subject: set, dict and other structures
References: <1107214762.198058.55680@f14g2000cwb.googlegroups.com>
	<JgALd.1731$sR5.1418@trndny05>
	<pan.2005.02.01.03.09.37.49281@jerf.org>
Message-ID: <1107348872.587834.24150@g14g2000cwa.googlegroups.com>

Leif K-Brooks:

>They look exactly the same speed-wise to me:

There's a little overhead, you can see it with a bigger test:

.from time import clock
.n = 1*10**6
.
.t1 = clock()
.d = set()
.for i in xrange(n):
.  d.add(i)
.t2 = clock()
.for i in xrange(n):
.  d.remove(i)
.t3 = clock()
.d = set(xrange(n))
.t4 = clock()
.print round(t2-t1,2), round(t3-t2,2), round(t4-t3,2), round(t4-t1,2)
.
.t1 = clock()
.d = {}
.for i in xrange(n):
.  d[i] = None
.t2 = clock()
.for i in xrange(n):
.  del d[i]
.t3 = clock()
.d = {}.fromkeys(xrange(n))
.t4 = clock()
.print round(t2-t1,2), round(t3-t2,2), round(t4-t3,2), round(t4-t1,2)

----------------------

Jeremy Bowers:

>I don't see a success pattern for it; I'd say they foundered on trying
to shoot for the moon in advance, instead of starting to write code and
incrementally improving it.<

I agree, their ideas seem too much abstract and big (and the resulting
code looks sloow); I am aiming to something quite simpler, like the
"sets" python module of Py2.3 (but the after the python version
development & testing, a C version can be useful, just like the set
objects in Py2.4).
My (simple) graph module is already nearly done ^_^

>Trying to create a graph library that meets any significant percentage
of
the needs of the people who would use it is quite non-trivial.<

This is right. But:
1) I've found some implementations of graphs:
- One inside Gato: http://www.zpr.uni-koeln.de/~gato/About/
- http://pygraphlib.sourceforge.net/dist/
- http://pygraphlib.sourceforge.net/doc/public/pygraphlib-module.html
- http://www.ics.uci.edu/~eppstein/PADS/
Some modules from Julien Burdy can be found, etc. I think I can find 5
different graph python modules, this number tells me that there's some
people that need/want them.
2) A graph data structure written in C probably cannot be the right one
for every person, because there are so many kinds of graphs... but if
it's fast and general enough and it's already there (and simple
enough!), then most people will start using it, adjusting their needs
to it...

----------------------

Giovanni Bajo:

>In fact, for a moment I wondered if dict.keys() was already of type
set in 2.4, because it could have made sense.<

Well, I presume sometimes you need a list, so maybe something like
dict.keysset() can be a better idea.


>Of course, there are some nitpicks.<

Yes.


>For instance, in the last case the dictionary at the intersection
should probably hold a tuple of two values, one coming from each
dictionary (since the intersection finds the items whose key is present
in both dictionaries, but the value can obviously be different).<

There are other possibilities.


>Another solution would be to say that set-like operations, like (d1 &
d2),
return an iterator to a sequence of keys *only*, in this case the
sequence of
keys available in both dictionaries.<

Right ^_^

Then let's see something:

a = {}.fromkeys(range(10),0)
b = {}.fromkeys(range(5,13),1)

1) a - b ==> dict
Its meaning can be something like:
r = {}
for k in set(a).difference(b): r[k] = a[k]

For functional programming people, it can even mean something like:
r = {}
scan(curry(r.__setitem__(Blank, a[k])), set(a).difference(b))
(Unlike map, scan does not build up a new expression to return.)


2) a + b ==> dict
Its meaning:
r = a.copy()
r.update(b)


3) The intersection is a bit tricky. I don't like the idea of resulting
a dict with tuple values, with both the values of the shared keys. The
other idea is nicer:
a.intersection(b)
Its possible meaning:
3a) set(a).intersection(b)
Alternative meaning:
3b) list(set(a).intersection(b))
(Instead of adding this intersection to dicts, it can just be made a
quite faster dict=>set conversion to make set(a).intersection(b) fast.)


4) Another possibility is less common, but easy to implement, so this
is optional:
a.xor(b)
Its meaning:
r = {}
for x in a: if x not in b: r[x] = r[a]
for x in b: if x not in a: r[x] = r[b]

(Probably there are better ways to implement them, here I've just used
python as a kind of pseudocode).

Bear hugs,
Bearophile



From itsme at yahoo.com  Tue Feb 22 09:20:25 2005
From: itsme at yahoo.com (It's me)
Date: Tue, 22 Feb 2005 14:20:25 GMT
Subject: problem with PythonCard -> wxPython -> _core.py -> class point ->
	__getitem__
Message-ID: <JcHSd.6192$OU1.2605@newssvr21.news.prodigy.com>

I've built a Python application using PythonCard 1.9 and Python 2.3 running
under Windows XP.   Everything works except that when I use the keyboard
instead of the mouse to do certain operations in a data entry field (like
Shift-Home), the
program stops at line 1014 of wx-2.5.3-msw.ansi\wx\_core.py.

    def __getitem__(self, index):
        try:
            x = self.Get()[index]
        except IndexError:
            raise IndexError, "tuple index %d out of range of %d"
%(index,len(self.Get()))
        return x

I downloaded the current version of wxPython (2.5.3.1) and tried again.
Same problem except that they've removed the exception handler and simply go
with:

    def __getitem__(self, index):        return self.Get()[index]

at line 1012.   The debugging shows that someone is calling this routine
repeatedly with index greater then the left of self.Get().   That's the best
I can do.

Any help?

(I can report to the wxPython list if nobody knows how to get around this)

Thanks,





From spam at nospam.org  Wed Feb  2 22:27:17 2005
From: spam at nospam.org (Erik Johnson)
Date: Wed, 2 Feb 2005 20:27:17 -0700
Subject: streaming a file object through re.finditer
References: <1107396145.400036.271010@g14g2000cwa.googlegroups.com>
	<1107396614.888869.94640@f14g2000cwb.googlegroups.com>
Message-ID: <420197f2@nntp.zianet.com>


    Is it not possible to wrap your loop below within a loop doing
file.read([size]) (or readline() or readlines([size]),
reading the file a chunk at a time then running your re on a per-chunk
basis?

-ej


"Erick" <idadesub at gmail.com> wrote in message
news:1107396614.888869.94640 at f14g2000cwb.googlegroups.com...
> Ack, typo. What I meant was this:
> cat a b c > blah
>
> >>> import re
> >>> for m in re.finditer('\w+', file('blah')):
>
> ...   print m.group()
> ...
> Traceback (most recent call last):
> File "<stdin>", line 1, in ?
> TypeError: buffer object expected
>
> Of course, this works fine, but it loads the file completely into
> memory (right?):
> >>> for m in re.finditer('\w+', file('blah').read()):
> ...   print m.group()
> ...
> a
> b
> c
>




From john_sips_teaz at yahooz.com  Thu Feb 17 10:38:50 2005
From: john_sips_teaz at yahooz.com (John)
Date: Thu, 17 Feb 2005 10:38:50 -0500
Subject: difference between class methods and instance methods
In-Reply-To: <FcydnRLnuorM1onfRVn-2g@comcast.com>
References: <pan.2005.02.17.07.04.37.907754@yahooz.com>
	<FcydnRLnuorM1onfRVn-2g@comcast.com>
Message-ID: <1119eklfad9v292@corp.supernews.com>

Steven Bethard wrote:
> John M. Gabriele wrote:
> 
>> 1. Are all of my class's methods supposed to take 'self' as their
>> first arg?
> 
> 
> If by "class's methods" you mean methods on which you called 
> classmethod, then no, they shouldn't take a 'self' parameter, they 
> should take a 'cls' parameter because the first argument to the function 
> will be the class:
> 
> class C(object):
>     @classmethod
>     def f(cls, *args):
>         # do stuff

Sorry -- I'm not as far along as you suspect. :) I've
never yet seen this "@classmethod" syntax. I'm supposing that
it's part of this so-called "new-style" class syntax.

When I ask "are all my class's methods...", I mean, when
I'm writing a class statement and the def's therein -- are
all those def's supposed to take 'self' as their first arg.

 From your reply, I gather that, unless I'm using this special
syntax (@classmethod or @staticmethod), all my def's are supposed
to take 'self' as their first arg.

> Undecorated methods (e.g. those that are not wrapped with classmethod or 
> staticmethod) should, on the other hand, take a 'self' parameter.

Ok. Check.

So then, are all def's -- that take 'self' as their first --
argument -- in a class statement, instance methods?


>> 2. Am I then supposed to call them with MyClass.foo() or instead:
>>
>>     bar = MyClass()
>>     bar.foo()
> 
> 
> Classmethods should be called from the class.  Python allows you to call 
> them from the instance, but this almost never does what you want, e.g.:
> 
> py> d = {}
> py> d.fromkeys(range(4))
> {0: None, 1: None, 2: None, 3: None}
> py> d
> {}
> 
> Note that 'd' is not updated -- I called a classmethod, not an 
> instancemethod.  If I had called dict.fromkeys instead, this would have 
> been clearer.

Right. An important lesson in C++ as well.


>> 3. Is "bound method" a synonym for instance method?
>>
>> 4. Is "unbound method" a synonym for class method?
> 
> 
> No.  To simplify things a little[1], a "bound method" is an instance 
> method that has been associated with a specific instance, and an 
> "unbound method" is an instance method that has not been associated with 
> a specific instance. 

Ok! Now I'm making some headway. *This* is getting
at the crux of the biscuit.


> Consider the difference between str.join and ''.join:
> 
> py> str.join
> <method 'join' of 'str' objects>
 >
> py> ', '.join
> <built-in method join of str object at 0x01233620>
 >

Hmm... weird.

> py> str.join(['a', 'b', 'c'])
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> TypeError: descriptor 'join' requires a 'str' object but received a 'list'
 >

Right -- 'cause there's no actual instance of a string
to do the joining. Check.

> py> ', '.join(['a', 'b', 'c'])
> 'a, b, c'

Check.

> py> str.join(', ', ['a', 'b', 'c'])
> 'a, b, c'

Ack! Now you're creeping me out. Looking at the doc for str.join:

| py> help( str.join )
| Help on method_descriptor:
|
| join(...)
|     S.join(sequence) -> string
|
|     Return a string which is the concatenation of the strings in the
|     sequence.  The separator between elements is S.
|

It says that you didn't call that method correctly. Yet
it works anyway!? What's happening here?


> In the example above, you can see that str.join is an "unbound method" 
> -- when I try to call it without giving it an instance, it complains. On 
> the other hand, ', '.join is a "bound method" because it has been bound 
> to a specific instance of str (in this case, the instance ', '). When I 
> call it without an instance, it doesn't complain because it's already 
> been bound to an instance.

Ok. I see that distinction. Thanks.



>> Where do the so-called "static methods" fit into all this?
>> By the name of them, it sounds like the same thing as class
>> methods...
> 
> 
> Staticmethods, like classmethods, are associated with the class object, 
> not the instance objects. 

That makes sense.

> The main difference is that when a 
> staticmethod is called, no additional arguments are supplied, while when 
> a classmethod is called, a first argument, the class, is inserted in the 
> argument list:
> 
> py> class C(object):
> ...     @classmethod
> ...     def f(*args):
> ...         print args
> ...     @staticmethod
> ...     def g(*args):
> ...         print args
> ...
> py> C.f(1, 2, 3)
> (<class '__main__.C'>, 1, 2, 3)
> py> C.g(1, 2, 3)
> (1, 2, 3)
> 
> STeVe

Thanks for that nice example. It looks like you're always
supposed to call both class and static methods via the class
name (rather than an instance name). I'll read up on what
this new @classmethod and @staticmethod syntax means.

> [1] Technically, I think classmethods could also considered to be "bound 
> methods" because in this case, the method is associated with a specific 
> instance of 'type' (the class in which it resides) -- you can see this 
> in the first argument that is supplied to the argument list of a 
> classmethod.



-- 
--- remove zees if replying via email ---


From bdesth.quelquechose at free.quelquepart.fr  Sat Feb  5 09:50:46 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 05 Feb 2005 15:50:46 +0100
Subject: sos!
In-Reply-To: <6d2e4eef.0502050342.d8744cb@posting.google.com>
References: <6d2e4eef.0502050342.d8744cb@posting.google.com>
Message-ID: <4204db04$0$14112$626a14ce@news.free.fr>

jordan2856977 a ?crit :
> hellow everybody! I'm from china. I'm a beginner of python. in china,
> python is not a fashionable language, so it's difficult to find some
> books about python. finally,I find a book named "python how to
> program" wrote by H.M.Deitel . who can tell me where can I find some
> interesting source code about python. otherwise, I will fell boring
> about study!

Well, if you want to study some interesting source code, you have the 
whole Python standard lib, and *many* open source programs (Zope, 
Twisted, etc...)

You can also find some good free books online, like Dive Into Python, or 
  Text Processing With Python. (google should find relevant URLs).

HTH, and welcome.


From tom.willis at gmail.com  Tue Feb 22 18:56:24 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Tue, 22 Feb 2005 18:56:24 -0500
Subject: python tutorial/projects
In-Reply-To: <56190b6c050222154816a2e2a3@mail.gmail.com>
References: <cvgf2o$u42$1@agate.berkeley.edu>
	<56190b6c050222154816a2e2a3@mail.gmail.com>
Message-ID: <b54d048905022215561560447@mail.gmail.com>

I found this one helpful

http://diveintopython.org/

and this one

http://ibiblio.org/obp/thinkCS/python/english/


Just found this one
http://hetland.org/python/instant-python

and this page has links to many more.

http://www.python.org/doc/Intros.html

And because I'm a huge Bruce Eckel fan.

Thinking in Python
http://mindview.net/Books/TIPython

It's old, but I still go through it every now and then.


-- 
Thomas G. Willis
http://paperbackmusic.net



On Tue, 22 Feb 2005 16:48:48 -0700, Steve Juranich <sjuranic at gmail.com> wrote:
> I think the tutorial offered at www.python.org/tut/tut.html is as good
> a starting place as any.
> 
> I wouldn't be able to suggest a "non-trivial" project without knowing
> more about your background.  Can you do a flashcard program? recipe
> organizer? SETI at Home client? (I think you see where this is going).
> 
> Good luck.
> 
> On Tue, 22 Feb 2005 15:23:37 -0800, Danny
> <dannyant at kingkong.me.berkeley.edu> wrote:
> > Does anyone know of a good python tutorial?
> > I was also looking for some non-trivial projects to do in python.
> >
> > Basically I would like to claim on my resume, that I know python, with
> > out bad karma.
> >
> > Danny
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From deetsNOSPAM at web.de  Fri Feb 18 08:26:38 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 18 Feb 2005 14:26:38 +0100
Subject: difference between class methods and instance methods
References: <pan.2005.02.17.07.04.37.907754@yahooz.com>
	<Xns96005FE3164DAduncanrcpcouk@127.0.0.1>
	<1119g2rre5g610c@corp.supernews.com>
	<37juh3F5d511mU1@individual.net>
	<Xns9600AE4FC946duncanrcpcouk@127.0.0.1>
Message-ID: <37m8n9F5dkf4kU1@individual.net>

> This is badly wrong. John was correct.
> 
> Bound methods get created whenever you reference a method of an instance.
> If you are calling the method then the bound method is destroyed as soon
> as the call returns. You can have as many different bound methods created
> from the same unbound method and the same instance as you want:

That did escape me so far - interesting. Why is it that way? I'd expect that
creating a bound method from the class and then storing it in the objects
dictionary is what happens. 

-- 
Regards,

Diez B. Roggisch


From jmeile at hotmail.com  Fri Feb 25 13:24:26 2005
From: jmeile at hotmail.com (Josef Meile)
Date: Fri, 25 Feb 2005 19:24:26 +0100
Subject: split a directory string into a list
In-Reply-To: <Xns96089DC274CF8duncanrcpcouk@127.0.0.1>
References: <4D97153E7D88F44FB6B534C661EE42900300A89C@medexch1.medplus.com>	<mailman.3048.1109342286.22381.python-list@python.org>
	<Xns96089DC274CF8duncanrcpcouk@127.0.0.1>
Message-ID: <421F6D5A.1000907@hotmail.com>

Hi Duncan,

> This should work reasonably reliably on Windows and Unix:
> 
> 
>>>>somestring = '/foo/bar/beer/sex/cigarettes/drugs/alcohol/'
>>>>os.path.normpath(somestring).split(os.path.sep)
> 
> ['', 'foo', 'bar', 'beer', 'sex', 'cigarettes', 'drugs', 'alcohol']
> 
> However a better solution is probably to call os.path.split repeatedly 
> until it won't split anything more:
> 
> 
>>>>somestring = r'C:\foo\bar\beer'
>>>>def splitpath(p):
> 
> 	res = []
> 	while 1:
> 		p, file = os.path.split(p)
> 		if not file:
> 			break
> 		res.append(file)
> 	res.append(p)
> 	res.reverse()
> 	return res
> 
> 
>>>>splitpath(somestring)
> 
> ['C:\\', 'foo', 'bar', 'beer']
> 
>>>>splitpath('foo/bar')
> 
> ['', 'foo', 'bar']
> 
> The first component is an empty string for relative paths, a drive letter 
> or \ for absolute Windows paths, \\ for UNC paths, / for unix absolute 
> paths.

I don't understand why the second approach is better than the first
one. In my opinion it is the contrary:

On the first approach, you only scan the string twice:
when you do "os.path.normpath(somestring)" and finally when splitting
the string. On the other hand, the second approach goes through the
string several times, when doing the os.path.split. Finally when doing
the res.reverse(). Or am I wrong? I also saw you said:
"This should work ***reasonably*** reliably on Windows and Unix". Are
there any cases when it does not work?

Regards,
Josef


From jdadson at yahoo.com  Tue Feb  8 22:29:34 2005
From: jdadson at yahoo.com (Jive Dadson)
Date: Wed, 09 Feb 2005 03:29:34 GMT
Subject: interactive execution
References: <42096A7A.2D8CF4E1@yahoo.com> <110isa55vfvhr79@corp.supernews.com>
	<42098308.7F0C6A41@yahoo.com>
Message-ID: <4209845C.EB468DC1@yahoo.com>

Yeah.  I got it.

exec "foo = 555" in globals(), locals() does the trick.


From aahz at pythoncraft.com  Wed Feb  9 14:09:06 2005
From: aahz at pythoncraft.com (Aahz)
Date: 9 Feb 2005 14:09:06 -0500
Subject: multi threading in multi processor (computer)
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
Message-ID: <cudn4i$5jd$1@panix1.panix.com>

In article <1107961698.225373.247440 at l41g2000cwc.googlegroups.com>,
ajikoe at gmail.com <ajikoe at gmail.com> wrote:
>
>Is anyone has experiance in running python code to run multi thread
>parallel in multi processor. Is it possible ?

Yes.  The GIL prevents multiple Python threads from running
simultaneously, but C extensions can release the GIL; all I/O functions
in the standard library do, so threading Python makes sense for e.g. web
spiders.  See the slides on my website for more info.

>Can python manage which cpu shoud do every thread?

Nope.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From lbates at syscononline.com  Sun Feb 20 20:18:53 2005
From: lbates at syscononline.com (Larry Bates)
Date: Sun, 20 Feb 2005 19:18:53 -0600
Subject: Tuple index
In-Reply-To: <cvbcc6$b5f$1@news.netins.net>
References: <cvbcc6$b5f$1@news.netins.net>
Message-ID: <IrSdncAaerNlq4TfRVn-hw@comcast.com>

Tuples don't have all the nice methods that lists have
so convert it to a list.

tuple=('a','b','c','d')
l=list(tuple)

now you can do:

list.index('c')

which returns 2

Remember index returns -1 when nothing is found.

Larry Bates


Steve M wrote:
> Hello,
> 
>         I'm trying to figure out the index position of a tuple member. 
> I know the member name, but I need to know the members index position. I
> know that if I use the statement print tuple[4] that it will print the
> contents of that location. What I don't understand is if I know that foo is
> a member of tuple, how do I get foo's index position.
> Thanks-in-Advance
> Steve


From mwm at mired.org  Wed Feb 23 14:28:28 2005
From: mwm at mired.org (Mike Meyer)
Date: Wed, 23 Feb 2005 13:28:28 -0600
Subject: user interface for python
References: <1109131790.140672.209730@l41g2000cwc.googlegroups.com>
	<pan.2005.02.23.09.45.55.878755@thomas-guettler.de>
	<421c9031$1@nntp0.pdx.net>
Message-ID: <86mztvf543.fsf@guru.mired.org>

Scott David Daniels <Scott.Daniels at Acm.Org> writes:

> Thomas Guettler wrote:
> You can write portable programs (if you test across platforms).   The
> only truly portable programs in any language are abstract.  Once you
> start dealing with I/O and the real world, you inevitably have to face
> issues one circumstance at a time.  Both Tkinter and wxPython spend a
> lot of effort in reducing the work you have to do.  Don't fool
> yourself with a manager-friendly slogan; programs must be tested to
> work.  Any I/O heavy (or threaded, or ....) application running on two
> platforms will take more work than on a single platform.  Python and
> wxPython or Tkinter, for example, _allow_ you to write portable
> programs, but they don't _guarantee_ it.


"There are no portable programs, only ported programs."

       -- John Gilmore (?)
       
        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From tjreedy at udel.edu  Wed Feb  9 15:00:26 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 9 Feb 2005 15:00:26 -0500
Subject: Vectors in Visual Python
References: <1107944975.498403.225950@f14g2000cwb.googlegroups.com>
	<pbvj01tiob4v5i6usnkr08j10s9koeh5kn@4ax.com>
Message-ID: <cudq1r$v64$1@sea.gmane.org>


"Arthur" <ajsiegel at optonline.com> wrote in message 
news:pbvj01tiob4v5i6usnkr08j10s9koeh5kn at 4ax.com...
> is that VPython "vectors" are in effect flat 3 element Numeric arrays,
> and Numeric ararys can be constructed with Float64 specified as the
> datatype.  (wonder if that speciufication is a "declaration", and if
> so whether that would indicate some conflict between Python's ideology
> (Alex's version) and that of its defacto standard numerical processing
> library - but I digress) .

I (and I believe Alex) object to name declaration *statements* and/or the 
strong typing of *names*.

I (and I believe Alex) approve of the strong typing of *objects*, which 
must somehow be indicated in the object creation *expression*.  This is 
absolutely fundamental to Python.  There are at least three ways to 
indicate the desired object type: literal type, constuctor (and other 
function) identity, and constructor (and other function) arguments.

When constructor arguments only specifiy the type of members of a 
homogeneous collection object, the visible type() of the collection itself 
may not be affected.  I believe member type specifications for numerical 
and num- arrays are like this, as they are for stdlib array.arrays.

Sorry, no conflict ;-)

Terry J. Reedy





From benjamin.cordes at blawrc.de  Mon Feb 14 13:22:06 2005
From: benjamin.cordes at blawrc.de (benjamin.cordes at blawrc.de)
Date: 14 Feb 2005 10:22:06 -0800
Subject: nested lists as arrays
In-Reply-To: <mailman.2545.1108401033.22381.python-list@python.org>
References: <b35e3308.0502140835.53d3d9b2@posting.google.com>
	<mailman.2545.1108401033.22381.python-list@python.org>
Message-ID: <1108405326.819090.219970@l41g2000cwc.googlegroups.com>

Allright. What difference in runtime and space would it make using
dictionaries instead?

Do you have a pointer for me concerning runtime of standard
manipulations in Pythons?

Thanks for tip.



From rkern at ucsd.edu  Mon Feb  7 23:17:09 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 07 Feb 2005 20:17:09 -0800
Subject: Big development in the GUI realm
In-Reply-To: <4208373e$0$21620$a1866201@visi.com>
References: <mailman.2123.1107820051.22381.python-list@python.org>
	<4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com>
	<cu95nd$7cr$1@news1.ucsd.edu>
	<6h7g0113up1v76k7qkad7bt17os1q73510@4ax.com>
	<4208237b$0$21623$a1866201@visi.com> <cu98n4$833$1@news1.ucsd.edu>
	<4208373e$0$21620$a1866201@visi.com>
Message-ID: <cu9eg0$9jb$1@news1.ucsd.edu>

Grant Edwards wrote:

> Sorry if I was a bit blunt, but I'm sick of people trying to
> weasle their way around a license by creative interpretation of
> the license terms when the licensors made their intentions as
> clear as possible.

Believe me, I share your frustration every time this issue comes up. 
However, I think it's best to follow Robert Heinlein's maxim:

  "Never attribute to malice what can adequately be explained by stupidity."

And I think we can also replace the word "stupidity" with "ignorance" if 
you like.

It seems to me that "Luke" is confused and ignorant. He has shown no 
indication that he intends to write proprietary software using Qt.

In any case, he may be right, and the FSF, Trolltech, and you could all 
be wrong. Your intention when you use the GPL may be moot if a judge 
determines that the text itself and copyright law does not support your 
interpretation.

I think that it is almost always best to obey the intentions of the 
copyright holder and to ask for clarification when it is unclear. On the 
other hand, if the copyright holder is *clearly* off-base with his 
interpretation (and to me this would require actual case law, not just 
the opinion of a lawyer), then I might consider disregarding the 
author's interpretation and going with what case law and my lawyer 
suggests. I don't believe that this situation holds with respect to this 
issue, of course.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From ncoghlan at iinet.net.au  Fri Feb 11 21:02:24 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 12 Feb 2005 12:02:24 +1000
Subject: namespaces module (a.k.a. bunch, struct, generic object, etc.)
 PEP
In-Reply-To: <Xns95FA7C434508Cjreeder@63.223.5.95>
References: <GaudndOHLML3M5bfRVn-vg@comcast.com>	<pan.2005.02.10.15.10.26.594432@jerf.org>	<4edc17eb.0502110255.1554217b@posting.google.com>	<mailman.2384.1108124642.22381.python-list@python.org>	<pan.2005.02.11.11.49.35.869566@jerf.org>
	<Xns95FA7C434508Cjreeder@63.223.5.95>
Message-ID: <420D63B0.1050800@iinet.net.au>

rzed wrote:
> I would bet that subclassing is *still* going to be common, though, 
> as each of us individually roll our own version to get that one 
> vital feature the standard doesn't cover (for me, it's update with 
> numerous other types)

This is certainly what I expect to happen. It's the main reason I think the 
relevant documentation (including the PEP and docstrings) should encourage the 
type(self).method() style of accessing class methods to avoid shadowing problems 
while still properly supporting inheritance.

The other important aspect is for the classes to be designed to be inheritance 
friendly.

> 
> Though I'd like it to have a shorter name. I'm lazy.

'from namespaces import Namespace as ns' :)

I thought about suggesting simply 'space' as a name, but I think that's way too 
vague. We're using it as a namespace, so we might as well call it one :)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From steven at lczmsoft.com  Sun Feb 27 00:52:00 2005
From: steven at lczmsoft.com (steven at lczmsoft.com)
Date: 26 Feb 2005 21:52:00 -0800
Subject: Problem When Unit Testing with PMock
In-Reply-To: <mailman.3095.1109443491.22381.python-list@python.org>
References: <1109423274.660110.156140@f14g2000cwb.googlegroups.com>
	<mailman.3095.1109443491.22381.python-list@python.org>
Message-ID: <1109483520.813509.171880@f14g2000cwb.googlegroups.com>

> def mockit(): raise StopIteration
> now pass mockit()

but it behaviors differenctly when pass in a mockit()  and pass in an
iterator with empty.  so i think the code emulates nothing.

> def intit(k):
>  for i in range(k): yield i

Now you mean define my own iteration without the help of pmock.   but
there are still so many other methods in the iterator for pass in,  i
have to mock them one by one totally manually, its boring and thats the
reason why i want pmock.



From fredrik at pythonware.com  Tue Feb 15 03:07:40 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 15 Feb 2005 09:07:40 +0100
Subject: calculate with date
References: <opsl8dlkqreybkhy@ze14.gg>
Message-ID: <cusaf5$g95$1@sea.gmane.org>

Detlef Jockheck wrote:

> I have a date-string given in format "dd.mm.yyyy". Now I would like to add  100 days. How can this 
> be solved in python?

>>> from datetime import date, timedelta
>>> d = date(2005, 2, 15)
>>> d
datetime.date(2005, 2, 15)
>>> d + timedelta(days=100)
datetime.date(2005, 5, 26)

more here:

    http://docs.python.org/lib/module-datetime.html

</F> 





From mhartl at post.harvard.edu  Sun Feb 13 16:34:21 2005
From: mhartl at post.harvard.edu (Michael Hartl)
Date: 13 Feb 2005 13:34:21 -0800
Subject: builtin functions for and and or?
In-Reply-To: <cuofcj$jvt$02$1@news.t-online.com>
References: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>
	<cuofcj$jvt$02$1@news.t-online.com>
Message-ID: <1108330461.853575.273700@g14g2000cwa.googlegroups.com>

I warmly recommend downloading Peter Norvig's Python utilities file
(http://aima.cs.berkeley.edu/python/utils.py) and putting it on your
Python path.  (E.g., in bash, put a line like

export PYTHONPATH="/path/to/utilities_directory"

in your .bashrc file.)  The utils.py file defines many useful
functions, including the ones you want:

# def every(predicate, seq):
#     """True if every element of seq satisfies predicate.
#     Ex: every(callable, [min, max]) ==> 1; every(callable, [min, 3])
==> 0
#     """
#     for x in seq:
#         if not predicate(x): return False
#     return True
#
# def some(predicate, seq):
#     """If some element x of seq satisfies predicate(x), return
predicate(x).
#     Ex: some(callable, [min, 3]) ==> 1; some(callable, [2, 3]) ==> 0
#     """
#     for x in seq:
#         px = predicate(x)
#         if px: return px
#     return False

Michael

--
Michael D. Hartl, Ph.D.
Chief Technology Officer
http://quarksports.com/



From steven.bethard at gmail.com  Mon Feb 21 16:31:32 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 21 Feb 2005 14:31:32 -0700
Subject: Tuple index
In-Reply-To: <cvdian$ejs$1@news.netins.net>
References: <cvbcc6$b5f$1@news.netins.net>
	<1108951559.490554.305310@l41g2000cwc.googlegroups.com>
	<cvdian$ejs$1@news.netins.net>
Message-ID: <zvOdneQkB6SyzoffRVn-jw@comcast.com>

Steve M wrote:
> I guess I explained my problem incorrectly. Let me try again.
> 
> tuple = ("fred", "barney", "foo")
> 
> I know that foo is an element of tuple, but what I need to know is what
> the index of foo is, tuple[?].

Larry Bates's solution is probably the best way to go here:

py> t = ("fred", "barney", "foo")
py> list(t).index("foo")
2
py> t[2]
'foo'

But note that if you're doing this often, you're probably using tuple 
for the wrong things.  Check out:

http://www.python.org/doc/faq/general.html#why-are-there-separate-tuple-and-list-data-types

If you're iterating over the items of something and the items are all of 
  the same type, you probably want a list, not a tuple.

What's the use case in which you want to do this?

STeVe


From vze4rx4y at verizon.net  Fri Feb  4 15:46:15 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Fri, 04 Feb 2005 20:46:15 GMT
Subject: returning True, False or None
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
Message-ID: <raRMd.9382$s16.4267@trndny02>

"Steven Bethard"
> For a given list:
> * If all values are None, the function should return None.
> * If at least one value is True, the function should return True.
> * Otherwise, the function should return False.

One more approach, just for grins:

    s = set(lst)
    return True in s or s == set([None]) and None


Raymond Hettinger




From peter at engcorp.com  Thu Feb  3 09:43:31 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 03 Feb 2005 09:43:31 -0500
Subject: Finding user's home dir
In-Reply-To: <s9zvf99218i.fsf@salmakis.intevation.de>
References: <5i9rtc.rq31.ln@orion.homeinvalid>
	<mailman.1800.1107419518.22381.python-list@python.org>
	<GcKdnaOlaN41tJ_fRVn-rg@powergate.ca>
	<s9zvf99218i.fsf@salmakis.intevation.de>
Message-ID: <nqGdnWgrpaEPpZ_fRVn-qA@powergate.ca>

Bernhard Herzog wrote:
> Peter Hansen <peter at engcorp.com> writes:
>>Miki Tebeka wrote:
>>
>>>>Hi all, I'm trying to write a multiplatform function that tries to
>>>>return the actual user home directory.
>>>>...
>>>
>>>What's wrong with:
>>>    from user import home
>>>which does about what your code does.
>>
>>:-)
>>
>>I suspect he simply didn't know about it.  I didn't either...
> 
> The purpose of the user module is executing ~/.pythonrc.py, which may
> not desirable.  It definitely shouldn't be done by a library, for
> instance.  Also, that the user's home directory is available as
> user.home is not documented, and I for one wouldn't want to rely on
> that.

Then please interpret my "please use the above recipe"
as suggesting he should do what the equivalent code in
the user.py module does in terms of finding the "home folder"
of the user, rather than his own home-grown approach.

-Peter


From elh at cs.pdx.edu  Fri Feb 18 10:39:17 2005
From: elh at cs.pdx.edu (Eric Hanson)
Date: Fri, 18 Feb 2005 15:39:17 +0000
Subject: 3d graphics
Message-ID: <20050218153917.GA53264@aquameta.com>

Hi,

I'm interested in doing some work with 3d graphics
visualizations of XML/RDF data in Python.  I know Python is
strong on the XML front but what about 3d graphics?  Is there a
graphics library out there with graphics library with a fairly
gradual learning curve?  Do people actually use Python for games
programming and the likes?

Thanks,
Eric


From invalidemail at aerojockey.com  Mon Feb 21 06:26:57 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 21 Feb 2005 03:26:57 -0800
Subject: lambda closure question
In-Reply-To: <mailman.2869.1108921769.22381.python-list@python.org>
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
	<1108808502.699333.66520@g14g2000cwa.googlegroups.com>
	<mailman.2831.1108814832.22381.python-list@python.org>
	<1108903184.145726.223480@l41g2000cwc.googlegroups.com>
	<1108904798.377200.313970@g14g2000cwa.googlegroups.com>
	<mailman.2869.1108921769.22381.python-list@python.org>
Message-ID: <1108985217.728665.252680@z14g2000cwz.googlegroups.com>


jfj wrote:
> The costly extra feature is this:
> ###############
>   def foo():
>      def f():
>         print x
>      x=1
>      f()
>      x=2
>      f()
>      return f
> foo()()
> #############
> which prints '1 2 2'
>
> The fractal code runs a little _slower_ because of this ability.
> Although the specific program does not take advantage of it!

True, in this case.  (Although it's not that much slower; I think it's
only one extra dereference per access plus a little overhead.)  But try
to extend your mind a bit and imagine that the recursive nested
function is called as part of a larger routine.  Say, for example,
something that seeks a certain shape for the fractal.

. def ifs(transformations,maxdepth):
.     def add_point(...):
.         ...
.     def test_shape():
.         ...
.     while True:
.         add_point(0,0,0,0)
.         x = test_shape()
.         if x < THRESHOLD:
.             break
.         transformations = adjust(transformation)

transformations gets rebound, so you'd need a reference to it.

I realize that this is getting more and more situationally specific (I
wouldn't yet say contrived, though; I have referenced changing bindings
a few times).  Maybe you have a point.


-- 
CARL BANKS



From ilias at lazaridis.com  Thu Feb 17 12:44:13 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Thu, 17 Feb 2005 19:44:13 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <868y5pi3rt.fsf@guru.mired.org>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr> <37bkemF5a7s7vU1@individual.net>
	<cut6nh$rpk$1@usenet.otenet.gr> <86ll9piuj8.fsf@guru.mired.org>
	<cutf1h$576$1@usenet.otenet.gr> <86hdkdimfb.fsf@guru.mired.org>
	<cutoj0$g93$1@usenet.otenet.gr> <868y5pi3rt.fsf@guru.mired.org>
Message-ID: <cv2l5d$cat$3@usenet.otenet.gr>

Mike Meyer wrote:
[...]

closing thread
http://groups-beta.google.com/group/comp.lang.python/msg/f2ae9cdbe16676d1

.

-- 
http://lazaridis.com


From vetter at lincom-asg.com  Mon Feb  7 17:18:05 2005
From: vetter at lincom-asg.com (Keith)
Date: 7 Feb 2005 14:18:05 -0800
Subject: PHP Embedded In Python
Message-ID: <1107814685.908990.58410@z14g2000cwz.googlegroups.com>

I am a python and php newbie.  Newbie is even pushing it.

I need to take the contents of my_cgi.py and evaluate it with the
php_module.  Is this possible.  I think that pyPHP goes the other way.

The only reason I need this is because the header that all the html
pages use on our website uses a php include and I really don't want to
rewrite all the php in python.

Thanks,
Keith



From alanmk at hotmail.com  Thu Feb 10 17:49:07 2005
From: alanmk at hotmail.com (Alan Kennedy)
Date: Thu, 10 Feb 2005 22:49:07 +0000
Subject: is there a safe marshaler?
In-Reply-To: <420bd184$0$28994$e4fe514c@news.xs4all.nl>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<9RMOd.47295$Z14.32810@news.indigo.ie>
	<420bd184$0$28994$e4fe514c@news.xs4all.nl>
Message-ID: <DtROd.47310$Z14.32852@news.indigo.ie>

[Irmen de Jong]
 >>> I need a fast and safe (secure) marshaler.

[Alan Kennedy]
 >> ...., would something JSON be suitable for your need?
 >>
 >> http://json.org

[Irmen de Jong]
 > Looks very interesting indeed, but in what way would this be
 > more secure than say, pickle or marshal?
 > A quick glance at some docs reveal that they are using eval
 > to process the data... ouch.

Well, the python JSON codec provided appears to use eval, which might 
make it *seem* unsecure.

http://www.json-rpc.org/pyjsonrpc/index.xhtml

But a more detailed examination of the code indicates, to this reader at 
least, that it can be made completely secure very easily. The designer 
of the code could very easily have not used eval, and possibly didn't do 
so simply because he wasn't thinking in security terms.

The codec uses tokenize.generate_tokens to split up the JSON string into 
tokens to be interpreted as python objects. tokenize.generate_tokens 
generates a series of textual name/value pairs, so nothing insecure 
there: the content of the token/strings is not executed.

Each of the tokens is then passed to a "parseValue" function, which is 
defined thusly:

#===================

   def parseValue(self, tkns):
     (ttype, tstr, ps, pe, lne) = tkns.next()
     if ttype in [token.STRING, token.NUMBER]:
       return eval(tstr)
     elif ttype == token.NAME:
       return self.parseName(tstr)
     elif ttype == token.OP:
       if tstr == "-":
        return - self.parseValue(tkns)
       elif tstr == "[":
        return self.parseArray(tkns)
       elif tstr == "{":
        return self.parseObj(tkns)
       elif tstr in ["}", "]"]:
        return EndOfSeq
       elif tstr == ",":
        return SeqSep
       else:
        raise "expected '[' or '{' but found: '%s'" % tstr
     else:
       return EmptyValue

#===================

As you can see, eval is *only* called when the next token in the stream 
is either a string or a number, so it's really just a very simple code 
shortcut to get a value from a string or number.

If one defined the function like this (not tested!), to remove the eval, 
I think it should be safe.

#===================

default_number_type = float
#default_number_type = int

   def parseValue(self, tkns):
     (ttype, tstr, ps, pe, lne) = tkns.next()
     if ttype in [token.STRING]:
       return tstr
     if ttype in [token.NUMBER]:
       return default_number_type(tstr)
     elif ttype == token.NAME:
       return self.parseName(tstr)
     elif ttype == token.OP:
       if tstr == "-":
        return - self.parseValue(tkns)
       elif tstr == "[":
        return self.parseArray(tkns)
       elif tstr == "{":
        return self.parseObj(tkns)
       elif tstr in ["}", "]"]:
        return EndOfSeq
       elif tstr == ",":
        return SeqSep
       else:
        raise "expected '[' or '{' but found: '%s'" % tstr
     else:
       return EmptyValue

#===================

The only other use of eval is also only for string types, i.e. in the 
parseObj function:

#===================
   def parseObj(self, tkns):
     obj = {}
     nme =""
     try:
       while 1:
         (ttype, tstr, ps, pe, lne) = tkns.next()
         if ttype == token.STRING:
           nme =  eval(tstr)
           (ttype, tstr, ps, pe, lne) = tkns.next()
           if tstr == ":":
             v = self.parseValue(tkns)
      # Remainder of this function elided
#===================

Which could similarly be replaced with direct use of the string itself, 
rather than eval'ing it. (Although one might want to look at encoding 
issues: I haven't looked at JSON-RPC enough to know how it proposes to 
handle string encodings.)

So I don't think there any serious security issues here: the 
"simplicity" of the JSON grammar is what attracted me to it in the first 
place, especially since there are already robust and efficient lexers 
and parsers already available built-in to python and javascript (and 
javascript interpreters are getting pretty ubiquitous these days).

And it's certainly the case that if the only available python impl of 
JSON/RPC is not secure, it is possible to write one that is both 
efficient and secure.

Hopefully there isn't some glaring security hole that I've missed: 
doubtless I'll find out real soon ;-) Gotta love full disclosure.

regards,

-- 
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan


From irmen.NOSPAM at xs4all.nl  Wed Feb  2 17:50:30 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Wed, 02 Feb 2005 23:50:30 +0100
Subject: Getting a module's byte code, how?
In-Reply-To: <bEcMd.102642$Jk5.69613@lakeread01>
References: <42014e25$0$28975$e4fe514c@news.xs4all.nl>
	<pan.2005.02.02.22.06.22.395829@freelance-developer.com>
	<420153cb$0$28984$e4fe514c@news.xs4all.nl>
	<bEcMd.102642$Jk5.69613@lakeread01>
Message-ID: <42015936$0$28984$e4fe514c@news.xs4all.nl>

Steve Holden wrote:

> I'm not sure why you think the module's code would be needed once it's 
> been executed. That assigns all necessary code blocks to the functions 
> defined therein, so the code, once the import has been executed, is 
> garbage (from the interpreter's rather process-centric view of things).

Ah, ofcourse. Thanks for this insight.
I may have to rethink some of this...

> I am presuming that this feature of Pyro won't allow a 2.3 system to 
> talk to a 2.4 one, since the byte codes are incompatible.

Correct. However, when you're not using mobile code (the default),
you're fine.

--Irmen


From eppstein at ics.uci.edu  Wed Feb 16 17:24:54 2005
From: eppstein at ics.uci.edu (David Eppstein)
Date: Wed, 16 Feb 2005 14:24:54 -0800
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net>
Message-ID: <eppstein-211DEC.14245416022005@news.service.uci.edu>

In article <37hippF4gcimiU1 at individual.net>,
 Leo Breebaart <leo at lspace.org> wrote:

> What I can't find an explanation for is why str.join() doesn't
> automatically call str() on its arguments, so that e.g.
> str.join([1,2,4,5]) would yield "1245", and ditto for e.g.
> user-defined classes that have a __str__() defined.

That would be the wrong thing to do when the arguments are unicodes.

-- 
David Eppstein
Computer Science Dept., Univ. of California, Irvine
http://www.ics.uci.edu/~eppstein/


From JoshuaACohen at gmail.com  Tue Feb  1 11:48:19 2005
From: JoshuaACohen at gmail.com (Josh)
Date: 1 Feb 2005 08:48:19 -0800
Subject: Handling MySQL connection
In-Reply-To: <gr9uv01engeb3mrbhs9100ud64hgflhiva@4ax.com>
References: <1107202241.789216.224920@c13g2000cwb.googlegroups.com>
	<gr9uv01engeb3mrbhs9100ud64hgflhiva@4ax.com>
Message-ID: <1107276499.419175.110000@c13g2000cwb.googlegroups.com>

Thanks for the help! I was able to work through it based on you
example. It was lack of knowledge of the object class that was throwing
me off.  

Josh



From jack at performancedrivers.com  Wed Feb 16 01:44:40 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Wed, 16 Feb 2005 01:44:40 -0500
Subject: "perl -p -i -e" trick in Python?
In-Reply-To: <3e8ca5c8050215223851664ca5@mail.gmail.com>
References: <cuuol5$2ri$1@news1.kornet.net>
	<3e8ca5c8050215223851664ca5@mail.gmail.com>
Message-ID: <20050216064440.GA16093@performancedrivers.com>

On Wed, Feb 16, 2005 at 04:38:03PM +1000, Stephen Thorne wrote:
> On Wed, 16 Feb 2005 15:18:57 +0900, Wonjae Lee <shotgunlee at hotmail.com> wrote:
> > I read the comment of
> > http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/277753.
> > (Title : Find and replace string in all files in a directory)
> > 
> > "perl -p -i -e 's/change this/..to this/g'" trick looks handy.
> > Does Python have a similar trick? Or, is there a shorter Python recipe for
> > the given problem?
> 
> sure.
> 
> python -c 'import os; os.system("sed -i s/change this/...tothis/g")'

You beat me to it, but you can cut a few more characters out of that.

/tmp/> python
Python 2.3.4 (#2, Jan  5 2005, 08:24:51) 
Type "help", "copyright", "credits" or "license" for more information.
>>> ^D
/tmp/> sed -i 's/change this/...tothis/g'


-Jack


From nvhengr at gmail.com  Thu Feb 10 14:09:27 2005
From: nvhengr at gmail.com (nvhengr at gmail.com)
Date: 10 Feb 2005 11:09:27 -0800
Subject: Python COM Makepy Excel 9.0 error
Message-ID: <1108062567.928124.219200@g14g2000cwa.googlegroups.com>

Has anyone seen this?  When I run the COM Makepy utility and choose
Microsoft Excel 9.0 Object Library (1.3), I get an application error
message:

PythonWin: Pythonwin.exe - Application Error
The instruction at "0x77fcc87" referenced memory at "0x0307a705".  The
memory could not be "read".

I do not get this error when I choose the Microsoft Office 9.0 Object
Library (2.1).

I have tried this from one other computer and got a similar error
message.  I looked all over the 'net for enlightenment and have so far
been unsuccessful.  Does anyone have an idea what can be going on and
how to get around it?

I am using Python 2.4 under Windows 2000SP4.  I have also installed
pywin32 (build 203 for Python 2.4) and py2exe-0.5.4 for Python 2.4.

Python 2.3 and the COM Makepy utility (Python 2.3 version) seems to run
okay.

I am writing a rather complicated set of instructions to manipulate a
series of Excel 2000 spreadsheets and have already added quite a few of
the features from Python 2.4, so I hope I do not have to revert back to
Python 2.3.  Any suggestions?

Thank you, in advance,
Christopher D. Morgan, P.E., Ph.D.



From fredrik at pythonware.com  Mon Feb 14 15:18:03 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 21:18:03 +0100
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr><cupstp$an7$2@ctb-nnrp2.saix.net><cupupa$kfs$2@usenet.otenet.gr><1108398011.213872.321390@o13g2000cwo.googlegroups.com><guLnmSj92OECFw0L@objmedia.demon.co.uk><1108408914.405899.129990@o13g2000cwo.googlegroups.com><jN8Xe7rj$PECFwHF@objmedia.demon.co.uk>
	<1108411614.268293.61270@z14g2000cwz.googlegroups.com>
Message-ID: <cur0sp$dph$1@sea.gmane.org>

"Pat" wrote:

> Having to tell users that they need to download, install, and configure
> all this additional compiler stuff is asking too much from my potential
> user base, since I'm also targeting novices and developers from other
> languages for whom C compiler stuff is going to be a barrier to entry.
>
> I hope that makes sense.  :-)

telling them to download and configure subversion just to be able to use
your stuff doesn't make much sense, no.

(not that subversion is hard to install, though, but it's a lot harder than just
running a bdist installer).

</F> 





From michele.simionato at gmail.com  Mon Feb 28 11:29:03 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 28 Feb 2005 08:29:03 -0800
Subject: Chinese curses,
	again (was Re: Why do descriptors (and thus properties) only work
	on attributes.)
In-Reply-To: <cvvcq8$mtp$1@panix1.panix.com>
References: <slrnd25nve.d87.apardon@rcpc42.vub.ac.be>
	<7xoee5kpiv.fsf@ruckus.brouhaha.com>
	<slrnd25pj4.d87.apardon@rcpc42.vub.ac.be>
	<cvuqhc$e02$1@news.sap-ag.de> <cvvcq8$mtp$1@panix1.panix.com>
Message-ID: <1109608143.482514.69560@f14g2000cwb.googlegroups.com>

Aahz:

> Not so Chinese:

> http://www.noblenet.org/reference/inter.htm

That page is incredible!
Me too I have a gut feeling that the citation is from the XX century
and from
some Western country (even if till now I had not questioned its
attribution).
I wish I could say more about its origin ...

            Michele Simionato



From phil at riverbankcomputing.co.uk  Tue Feb 22 04:17:37 2005
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Tue, 22 Feb 2005 09:17:37 -0000 (GMT)
Subject: PyQt Python Bindings for Qt v3.14 Released
In-Reply-To: <cvdfo2$krv$1@atlantis.news.tpi.pl>
References: <mailman.2854.1108891957.22381.python-list@python.org>
	<cvdfo2$krv$1@atlantis.news.tpi.pl>
Message-ID: <57371.82.68.80.137.1109063857.squirrel@river-bank.demon.co.uk>

> Phil Thompson napisa?(a):
>
>> Riverbank Computing is pleased to announce the release of PyQt v3.14
>> available
>> from http://www.riverbankcomputing.co.uk/.
>
> Classes generated by puyic 3.13 are not compatible with PyQt 3.14 (some
> method signature incompatibilities). I cann't provide more details, as I
> regenerated all classes from *.ui files, but this may be reproductible.

Yes - but this is a bug in pyuic 3.13 and earlier which is tickled by SIP
4.2.

Phil



From itsme at yahoo.com  Wed Feb 23 01:36:19 2005
From: itsme at yahoo.com (It's me)
Date: Wed, 23 Feb 2005 06:36:19 GMT
Subject: PythonCard and Py2Exe
References: <1109108628.859879.121020@g14g2000cwa.googlegroups.com>
Message-ID: <DvVSd.6435$OU1.4090@newssvr21.news.prodigy.com>

It's:

    from PythonCard.components import radiogroup

not just:

    from PythonCard import radiogroup


"PipedreamerGrey" <pipedreamergrey at gmail.com> wrote in message
news:1109108628.859879.121020 at g14g2000cwa.googlegroups.com...
> I'm trying to create a standalone version (.exe) of PythonCard's Custdb
> sample using Py2Exe version 0.5.0.  Everytime I attempt to compile the
> program, I get an error during compilation.  This is the exact code I'm
> using in the setup file:
>
> from distutils.core import setup
> import py2exe
> setup( name = "custdb",
>        console = ["custdb.py"],
>        data_files = [ (".", ["custdb.ini", "custdb.de.rsrc.py",
> "custdb.rsrc.py", "customerdata.csv"]) ]
>        )
>
> This is the error message I get when I run custdb.exe:
>
> Traceback (most recent call last):
>   File "custdb.py", line 202, in ?
>     app = model.Application(CustDbStack)
>   File "PythonCard\model.pyc", line 337, in __init__
>   File "PythonCard\resource.pyc", line 48, in getResource
>   File "PythonCard\resource.pyc", line 86, in __init__
>   File "PythonCard\resource.pyc", line 91, in __init__
>   File "PythonCard\resource.pyc", line 91, in __init__
>   File "PythonCard\resource.pyc", line 96, in __init__
>   File "PythonCard\resource.pyc", line 139, in enforceSpec
>   File "PythonCard\resource.pyc", line 30, in loadComponentModule
> ImportError: cannot import module 'radiogroup
>
> When I add "radiogroup" to the imports at the top of custdb.py, I get
> this error message:
>
> Traceback (most recent call last):
>   File "custdb.py", line 18, in ?
> ImportError: cannot import name radiogroup
>
> This is line 18 in Custdb.py: from PythonCard import dialog, model,
> radiogroup
>




From grante at visi.com  Mon Feb 14 19:03:10 2005
From: grante at visi.com (Grant Edwards)
Date: 15 Feb 2005 00:03:10 GMT
Subject: parsing IMAP responses?
References: <mailman.2585.1108423477.22381.python-list@python.org>
Message-ID: <42113c3e$0$44602$a1866201@visi.com>

On 2005-02-14, Tony Meyer <t-meyer at ihug.co.nz> wrote:
>> Is there a library somewhere that impliments the IMAP protocol 
>> syntax?
>
> Twisted has pretty good IMAP support (particularly client), and it's much
> higher level than imaplib.  It probably does what you're after.

I'll take a look.

> Of course, the catch is that you have to use twisted <0.5 wink>.

There's always a catch...

-- 
Grant Edwards                   grante             Yow!  I'm thinking about
                                  at               DIGITAL READ-OUT systems
                               visi.com            and computer-generated
                                                   IMAGE FORMATIONS...


From steven.bethard at gmail.com  Wed Feb 16 16:50:42 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 16 Feb 2005 14:50:42 -0700
Subject: Test for structure
In-Reply-To: <1108585957.015878.52530@f14g2000cwb.googlegroups.com>
References: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
	<Q5idne-AU8PsPI7fRVn-3A@comcast.com>
	<1108585957.015878.52530@f14g2000cwb.googlegroups.com>
Message-ID: <Q7Sdncrm4ZitXY7fRVn-gg@comcast.com>

Michael Hartl wrote:
> I use a function isListLike in cases such as this one:
> 
> # def isListLike(L):
> #     """Return True if L is list-like, False otherwise."""
> #     try:
> #         L + []
> #         return True
> #     except:
> #         return False
> 
> Then you can use a standard if-else construct:
> 
> # if isListLike(myvar):
> #     <do something>
> # else:
> #     <do something else>

What kind of situations do you use this for?  I almost never have to do 
this kind of typechecking.  If it's supposed to be a list, I just use it 
as a list...

STeVe


From alan.gauld at btinternet.com  Mon Feb 28 03:55:52 2005
From: alan.gauld at btinternet.com (Alan Gauld)
Date: Mon, 28 Feb 2005 08:55:52 +0000 (UTC)
Subject: lambda strangeness??
References: <v73321hkh2v7bhrnj7enet296entdj5drb@4ax.com>
	<FzgUd.21875$_n3.2717739@phobos.telenet-ops.be>
Message-ID: <jum521tc2bmfqkm86fi0cdubk5s4aa4d94@4ax.com>

On Sun, 27 Feb 2005 09:39:49 GMT, Roel Schroeven
<rschroev_nospam_ml at fastmail.fm> wrote:

> >>>>adds = [lambda y: (y + n) for n in range(10)]

> You're picking it up not as y but as n, since n in the lambda is
> evaluated when you call the lambde, not when you define it.

> >>> for n in range(10):
> 	def f(y, n=n): return y+n
> 	adds.append(f)

>>> adds = [lambda x, y=n: (x + y) for n in range(10)]

Works perfectly, thanks Roel.
I knew I'd got this to work in the past with a for loop
so I knew it should be possible in a comprehension. I
just forgot the default argument trick! And then confused myself
by coincidentally using n both inside and outside the LC, thus
apparently getting inconsistent results!

Thanks again,

Alan G.

Author of the Learn to Program website
http://www.freenetpages.co.uk/hp/alan.gauld


From danperl at rogers.com  Fri Feb  4 14:21:42 2005
From: danperl at rogers.com (Dan Perl)
Date: Fri, 4 Feb 2005 14:21:42 -0500
Subject: [perl-python] get web page programatically
References: <1107543599.362575.210730@o13g2000cwo.googlegroups.com>
Message-ID: <w4GdnVm39bLRVp7fRVn-pg@rogers.com>


"Xah Lee" <xah at xahlee.org> wrote in message 
news:1107543599.362575.210730 at o13g2000cwo.googlegroups.com...
# note the line
# from <library_name> import <function_name1,function_name2...>
# it reads the library and import the function name
# to see available functions in a module one can use "dir"
# import urllib; print dir(urllib)

After about a month, this tutorial has finally reached the syntax of the 
"import" statement!

And word of advice to python beginners, "print dir(urllib)" is not very 
useful in the sense mentioned here (it prints all the names defined in the 
module with no explanations, and those names are not only functions, BTW). 
But "help(urllib)" is much more useful.  Even with such a simple script, 
this tutorial still managed to give some bad advice. 




From ilias at lazaridis.com  Tue Feb 15 11:07:15 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 18:07:15 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <37bkemF5a7s7vU1@individual.net>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr> <37bkemF5a7s7vU1@individual.net>
Message-ID: <cut6nh$rpk$1@usenet.otenet.gr>

Diez B. Roggisch wrote:
>>One of the most funny things within open-source is that switching:
>>
>>first:
>>"we have powerfull solutions which beat this and that"
>>
>>then:
>>"hey, this is just volunteer work"
> 
> I don't see the contradiction here. It beats a great deal of commercial
> solutions in a lot of ways. But not on every single one of these. And the
> _reason_ for beating commercial software in certain aspects is exactly that
> somebody stood up and volunteered. Obviously you aren't interested in the
> more labour-intensive parts of the os-development.

Sometimes the core-team must provide infrastructure for volunteers to 
contribute (as in this MinGW case).

http://lazaridis.com/core/product/case.html

>>But if those answers above were of official nature, I must seriously
>>rethink if I can rely on _any_ system which is based on python, as the
>>foundation and the community do not care about essential needs and
>>requirements.
> 
> They might not care about _your_ perceived essential needs. But as lots of
> people use python and python based solutions with great commercial success,
> you might think of reviewing your needs more critical. After all, there is
> no _perfect_ system for all needs.

MinGW compatibility is not my need.

It is an community need.

.

-- 
http://lazaridis.com


From shitizb at yahoo.com  Fri Feb 25 13:33:32 2005
From: shitizb at yahoo.com (Shitiz Bansal)
Date: Fri, 25 Feb 2005 10:33:32 -0800 (PST)
Subject: [Tutor] threads
In-Reply-To: <797fe3d405022509045048272d@mail.gmail.com>
Message-ID: <20050225183333.81275.qmail@web53807.mail.yahoo.com>

> >Can anyone guide me on how to spawn
> >simultaneously( or
> > pseudo simultaneously) running microthreads using
> > stackless.
> > 
> > Here is what i tried..
> > 
> > def gencars(num,origin,dest,speed):
> >     global adjls
> >     global cars
> >     global juncls
> >     for i in range(num):
> > 
> >              cars.append(car(orig,dest,speed)
> >              task=tasklet(cars[i].run())
> >              task.setup('Bind using Setup')
> > 
> > Now this is what i copied from somewhere...i dont
> > claim to understand fully what is happening.Here
> > car.run() is a process which takes a long time to
> > execute.
> > 
> > What happens on execution is....One car is
> >initialised
> > and then the program waits for its run method to
> > complete before proceeding.
> > 
> >How is it different from :
> > for i in cars:
       i.run()



> > I also feel that there is no clear documentation
> > on
> > stackless.
> > 
> > Show me the light.
> > 


		
__________________________________ 
Do you Yahoo!? 
Read only the mail you want - Yahoo! Mail SpamGuard. 
http://promotions.yahoo.com/new_mail 


From harlinseritt at yahoo.com  Thu Feb 10 18:02:25 2005
From: harlinseritt at yahoo.com (Harlin)
Date: 10 Feb 2005 15:02:25 -0800
Subject: [N00B] What's %?
In-Reply-To: <614c778e.0502100938.6665cb52@posting.google.com>
References: <614c778e.0502100938.6665cb52@posting.google.com>
Message-ID: <1108074594.398184.252120@f14g2000cwb.googlegroups.com>

In the mode of anticipating another question... I get these all the
time at work of all places! You'd think IT workers would know the
answer to these...

What good is the modulus operator? What would I ever need it for?

* A quick way of testing whether an integer is even and odd
* For that matter, a quick way of testing whether a the variable is a
factor of any other arbitrary number.
* In some programs (a weight control program I worked on comes to mind)
it's necessary to get a remainder so that you can get the results of a
leftover evenly divisible number.

Regards,

Harlin


administrata wrote:
> Hi! it's been about a week learning python!
> I've read 'python programming for the absolute begginer'
> I don't understand about % like...
>
> 107 % 4 = 3
> 7 % 3 = 1
>
> I'm confused with division :/
> Please help me...
> 
> thx 4 reading.



From http  Mon Feb 28 04:22:16 2005
From: http (Paul Rubin)
Date: 28 Feb 2005 01:22:16 -0800
Subject: Why do descriptors (and thus properties) only work on
	attributes.
References: <slrnd25nve.d87.apardon@rcpc42.vub.ac.be>
Message-ID: <7xoee5kpiv.fsf@ruckus.brouhaha.com>

Antoon Pardon <apardon at forel.vub.ac.be> writes:
> Can anyone explain why descriptors only work when they are an attribute
> to an object or class.  I think a lot of interesting things one can
> do with descriptors would be just as interesting if the object stood
> on itself instead of being an attribute to an other object.

How would that work?


From snail at objmedia.demon.co.uk  Mon Feb 14 13:59:37 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Mon, 14 Feb 2005 18:59:37 +0000
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<4210a434$0$23451$626a14ce@news.free.fr>
	<mailman.2539.1108397140.22381.python-list@python.org>
	<37c1cgF35vfuvU1@individual.net>
	<1108405269.472669.172070@o13g2000cwo.googlegroups.com>
Message-ID: <5tSR28oZUPECFwnQ@objmedia.demon.co.uk>

In message <1108405269.472669.172070 at o13g2000cwo.googlegroups.com>, Pat 
<pobrien at orbtech.com> writes
>now it feels like I'm in the company of a bunch of hell-bent school
>bullies.

 From my experience of bully behaviour that isn't what is happening here. 
Bullying usually involves abusive behaviour and language and isn't much 
to do with the topic as the person. The responses he has got are to do 
with how he is behaving, not who he is. I haven't seen any abusive 
language. As for behaviour, people are being as blunt with him as he is 
with them. Many have also told him what he should do in order to get a 
better response. He has ignored them.

Many societies around the world shun people that won't fit the norm. The 
norm in the newsgroups he is causing trouble in is that "You look for 
yourself first, do some research, then ask". He isn't even willing to 
use a search engine, let alone read the documentation or heaven forbid, 
read the source code himself. Sooner or later he'll give up, or realise 
that if he does a bit of the work himself he'll get much more back. Its 
up to him.

You'll notice that I've answered your question in another reply as its 
obvious you have put some effort in before making your comments. In 
other words I am not behaving in a contradictory way to what I specified 
above.

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From P at draigBrady.com  Tue Feb  8 11:56:37 2005
From: P at draigBrady.com (P at draigBrady.com)
Date: Tue, 08 Feb 2005 16:56:37 +0000
Subject: graph visualisation
In-Reply-To: <MSGID_2=3A5025=2F3.131_420910b1@fidonet.org>
References: <MSGID_2=3A5025=2F3.131_420910b1@fidonet.org>
Message-ID: <bb6Od.47135$Z14.32303@news.indigo.ie>

Alexander Zatvornitskiy wrote:
> Hello, All!
> 
> I need routines for visualization of graphs, like this for Matlab:

You could output the dot language, parsed by graphviz
See: http://dkbza.org/pydot.html

P?draig.


From paul at subsignal.org  Tue Feb 22 15:04:10 2005
From: paul at subsignal.org (paul koelle)
Date: Tue, 22 Feb 2005 21:04:10 +0100
Subject: recommended way of generating HTML from Python
In-Reply-To: <1109007020.958323.93140@z14g2000cwz.googlegroups.com>
References: <1108889625.068929.88890@z14g2000cwz.googlegroups.com>
	<4218f506$0$1220$8fcfb975@news.wanadoo.fr>
	<1108965380.059565.200110@g14g2000cwa.googlegroups.com>
	<4219d2a5$1_1@newspeer2.tds.net>
	<1109007020.958323.93140@z14g2000cwz.googlegroups.com>
Message-ID: <380gnaF5jg5uaU1@individual.net>

Michele Simionato wrote:
>  Also, one could argue that the designer should
> not get in touch with the HTML, but just play with the CSS.
> Finally, you can achieve separation between logic and presentation just
> putting the routines generating the HTML pages in a separate module, no need to use
> a different language.

Yea, why can't we start using xHTML like any other GUI toolkit, its just 
a tree of widgets. The layout is completely up to CSS... One could write 
  Form classes with automatic generation of client(javascript) and 
server side(python) validators ;)

greetings
  Paul


From stephen.thorne at gmail.com  Wed Feb 23 20:58:56 2005
From: stephen.thorne at gmail.com (Stephen Thorne)
Date: Thu, 24 Feb 2005 11:58:56 +1000
Subject: Attaching to a Python Interpreter a la Tcl
In-Reply-To: <1109155068.468295.121630@f14g2000cwb.googlegroups.com>
References: <1109155068.468295.121630@f14g2000cwb.googlegroups.com>
Message-ID: <3e8ca5c8050223175816188aaf@mail.gmail.com>

On 23 Feb 2005 02:37:48 -0800, DE <devrim.erdem at gmail.com> wrote:
> Hello,
> 
> Some long time ago, I used to use Tcl/Tk. I had an tcl embedded into my
> app.
> 
> The coolest thing was however, I was able to attach to the interpreter
> (built in to my app) via a tcl shell in which I could type in regular
> tcl code which would be interpreted by the interpreter of my
> application. Naturally, it was possible to call tcl functions of my
> applications.
> 
> Some kind of rapid RPC.
> 
> Is this also possible with python ?

Yes, using something like twisted's 'Manhole', which allows you to
execute code in the server process.

It may require twisted-ising your application however.

Stephen


From junkmail at chipworks.net  Tue Feb 15 11:28:39 2005
From: junkmail at chipworks.net (Junkmail)
Date: 15 Feb 2005 08:28:39 -0800
Subject: Zope: Adding a layer causes valid output to become an object
	reference?
References: <1108088812.610093.95990@l41g2000cwc.googlegroups.com>
	<x73bw1imyh.fsf@handshake.de>
Message-ID: <1108484919.421842.55420@l41g2000cwc.googlegroups.com>

Dieter,

Thanks for the reply.  I ran across an article in the Zope FAQ that
nailed the problem on the head.  Basically it said the same thing you
are saying.  For those that follow in my footsteps one day...

ZPublisher Implicitly calls the method of a url which in the case of a
zclass is a call to index_html.  From ZPT and DTML however you must
Explicitly call the method of your zclass, for example:

  <dtml-var "get_users.index_html()">

The paren () on the end are important!!

To make matters worse my external script references parameters in the
actual object I'm calling, but since I'm not calling a DTML method and
I have to explicitly reference the method I want to call, the DTML
namespace gets shipped to my external method instead of the namespace
of my called object.  I read "groking acquisition" 4 times before I
groked it.  To fix that I changed the index_html of my zclass to a
python script and call my external script from there so I can pass the
proper namespaces to the external script.  I suppose I can do that from
a DTML method, but the python script makes it absolutely clear what the
intention is.

I think the proper thing for the long term is re-write this as a
Product and emulate the way a DTML method accepts a call so I can avoid
all the "blah.index_html()" references and provide something a bit less
error prone (more standard).

I'm highly tempted to hack the existing DTML method into a new product
and leave DTML in it so I can combine Textile with DTML in a single
object.

Thanks,

Mike



From steven.bethard at gmail.com  Wed Feb 16 17:33:38 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 16 Feb 2005 15:33:38 -0700
Subject: sampling items from a nested list
Message-ID: <7_adnQhRBYDdV47fRVn-sA@comcast.com>

So, I have a list of lists, where the items in each sublist are of 
basically the same form.  It looks something like:

py> data = [[('a', 0),
...          ('b', 1),
...          ('c', 2)],
...
...         [('d', 2),
...          ('e', 0)],
...
...         [('f', 0),
...          ('g', 2),
...          ('h', 1),
...          ('i', 0),
...          ('j', 0)]]

Now, I'd like to sample down the number of items in each sublist in the 
following manner.  I need to count the occurrences of each 'label' (the 
second item in each tuple) in all the items of all the sublists, and 
randomly remove some items until the number of occurrences of each 
'label' is equal.  So, given the data above, one possible resampling 
would be:

     [[('b', 1),
       ('c', 2)],

      [('e', 0)],

      [('g', 2),
       ('h', 1),
       ('i', 0)]]

Note that there are now only 2 examples of each label.  I have code that 
does this, but it's a little complicated:

py> import random
py> def resample(data):
...     # determine which indices are associated with each label
...     label_indices = {}
...     for i, group in enumerate(data):
...         for j, (item, label) in enumerate(group):
...             label_indices.setdefault(label, []).append((i, j))
...     # sample each set of indices down
...     min_count = min(len(indices)
...                     for indices in label_indices.itervalues())
...     for label, indices in label_indices.iteritems():
...         label_indices[label] = random.sample(indices, min_count)
...     # return the resampled data
...     return [[(item, label)
...              for j, (item, label) in enumerate(group)
...              if (i, j) in label_indices[label]]
...             for i, group in enumerate(data)]
...
py>
py> resample(data)
[[('b', 1), ('c', 2)], [('d', 2), ('e', 0)], [('h', 1), ('i', 0)]]
py> resample(data)
[[('b', 1), ('c', 2)], [('d', 2)], [('f', 0), ('h', 1), ('j', 0)]]

Can anyone see a simpler way of doing this?

Steve


From les_ander at yahoo.com  Sun Feb 20 12:24:36 2005
From: les_ander at yahoo.com (les_ander at yahoo.com)
Date: 20 Feb 2005 09:24:36 -0800
Subject: intersection of 2 list of pairs
Message-ID: <1108920276.253388.23590@f14g2000cwb.googlegroups.com>

Hi,
I have 2 lists of tuples that look like:
E1=[('a','g'),('r','s')] and
E2=[('g','a'),('r','q'),('f','h')].
In this tuple, the ordering does not
matter, i.e. (u,v) is the same as (v,u).

What I want to do is the following:
given 2 list of tuples, E1 and E2, I want to create another list with
tuples that are common to both. So in the above example I would like
to return ('a','g') as being common.
So far I have the code below but it does not work out properly, I would
be grateful if someone can help me out .
thanks

def list_of_tuples_intersect(E1,E2):

	S1=Set()
	S2=Set()
	for e in E1:
		S1.add((e[0],e[1]))
		S1.add((e[1],e[0]))
	for e in E2:
		S2.add((e[0],e[1]))
		S2.add((e[1],e[0]))
	S= S1 & S2
	SS=Set()
	done=Set()

	for e in S:
		if ((e[0],e[1])  in done) or ((e[1],e[0])  in done):
			continue
		else:
			SS.add((e[0],e[1]))
			done.add((e[0],e[1]))
			done.add((e[1],e[0]))
	return SS



From rigga at hasnomail.com  Wed Feb 16 16:03:19 2005
From: rigga at hasnomail.com (Rigga)
Date: Wed, 16 Feb 2005 21:03:19 GMT
Subject: How can I Fill in web form and post back
References: <LJtQd.2010133$B07.305765@news.easynews.com>
	<mailman.2655.1108504446.22381.python-list@python.org>
	<3QMQd.2109818$B07.322065@news.easynews.com>
	<mailman.2718.1108586475.22381.python-list@python.org>
Message-ID: <ryOQd.2123777$B07.324533@news.easynews.com>

Joe Francia wrote:

> On Wed, 16 Feb 2005 19:05:35 GMT, Rigga <rigga at hasnomail.com> wrote:
> 
>> Joe Francia wrote:
>>
>>> Rigga wrote:
>>>> Hi,
>>>>
>>>> I am looking for the best way to use Python to get a web page, look for
>>>> some particular fields on a form, fill in the fields and submit the
>>>> form
>>>> but I have no idea where to start - any pointers appreciated
>>>>
>>>> many thanks
>>>>
>>>> Rigga
>>>
>>> Here's a pretty good resource:
>>> http://www.google.com/search?q=python+fill+web+forms
>>>
>> Thanks but I already checked there and didnt come up with much
> 
> Really?  The second link is for ClientForm, the description of which
> reads:
> 
> "ClientForm is a Python module for handling HTML forms on the client side,
> useful for parsing HTML forms, filling them in and returning the completed
> forms to the server."
> 
> That seems to exactly fulfil your requirements.  Are you sure you really
> looked?
> 
Yep definately looked, but overlooked that, wasnt really looking for a
premade routine to do it all but I can learn from that! thanks for pointing
it out, looks like what I need 

Thanks


From tony_barratt at hotmail.com  Thu Feb 17 04:05:21 2005
From: tony_barratt at hotmail.com (tony barratt)
Date: Thu, 17 Feb 2005 09:05:21 +0000
Subject: performance increase rpm v compile
Message-ID: <BAY101-F34EBDA906D432C07E9F1C2FE6D0@phx.gbl>

Hello,

I am working on a python app which does quite a lot of database manipulation 
via berkeley db.
An increase in performance would be welcome, although ait is pretty quick it 
just has a lot to do.
Currently it runs on RH 8.0, FC2 or 3 coming. And it is installed from an 
(rpm python-2.2.1-17).
It runs on a dual processor xeon. My experience with X leads me to believe 
you can get a performance increase of 10-20% from compiling it.
Is this likely to be true for python?


TIA

Tony




From steven at lczmsoft.com  Wed Feb 23 22:56:13 2005
From: steven at lczmsoft.com (steven at lczmsoft.com)
Date: 23 Feb 2005 19:56:13 -0800
Subject: How Do I get Know What Attributes/Functions In A Class?
In-Reply-To: <4219d002$1_2@newspeer2.tds.net>
References: <1108870842.095282.54200@z14g2000cwz.googlegroups.com>
	<d1c02$42182841$a228dd19$19743@ispnews.usenetserver.com>
	<4219d002$1_2@newspeer2.tds.net>
Message-ID: <1109217373.209741.149690@g14g2000cwa.googlegroups.com>

Thank you All !



From kdahlhaus at yahoo.com  Thu Feb 17 09:21:06 2005
From: kdahlhaus at yahoo.com (kdahlhaus at yahoo.com)
Date: 17 Feb 2005 06:21:06 -0800
Subject: pyFMOD writing a callback function in Python
In-Reply-To: <373e7eF55ufldU1@individual.net>
References: <370m88F525p5uU1@individual.net><brasff8a.fsf@python.net>
	<373e7eF55ufldU1@individual.net>
Message-ID: <1108650065.948558.114850@z14g2000cwz.googlegroups.com>

Any opinion on pyFMOD vs. pySonic?



From fumanchu at amor.org  Thu Feb 17 03:43:47 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Thu, 17 Feb 2005 00:43:47 -0800
Subject: "Best" way to SIGHUP spamd from web page?
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E3398459@exchange.hqamor.amorhq.net>

I'd like to be able to restart spamd (the SpamAssassin daemon) from a
web page, so that it will reload its system config files. Currently, I'm
only worried about Debian; my SA is from the testing (Sarge) distro, and
I'm running Apache 1.3. I don't have any other signals to send, or
commands, and no dynamic values other than the pid (which I can read
just fine from /var/run/spamd.pid).

Basically, there are half-a-dozen different ways to get this to happen,
but all of them spend 3/4 of their documentation saying "DON'T EVER DO
THIS". I'm just wondering if anyone has recommendations for whose advice
to ignore first. ;) Detailed explanations of your choice would be much
appreciated, of course.


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org


From webmaster at python.org  Thu Feb 10 16:25:57 2005
From: webmaster at python.org (webmaster at python.org)
Date: Thu, 10 Feb 2005 16:25:57 -0500
Subject: www.python.org down
Message-ID: <20050210212557.GA14386@panix.com>

Yes, we know that www.python.org is down.  Please be patient.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From fredrik at pythonware.com  Sat Feb 19 12:39:04 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 19 Feb 2005 18:39:04 +0100
Subject: unicode and socket
References: <1108753426.318777.275250@c13g2000cwb.googlegroups.com><opsmeqf1w76yt6e7@news.cisco.com>
	<1108782636.359541.99450@z14g2000cwz.googlegroups.com>
Message-ID: <cv7tc6$55l$1@sea.gmane.org>

anonymous coward <zyqnews at 163.net> wrote:

> It's really funny, I cannot send a unicode stream throuth socket with
> python while all the other languages as perl,c and java can do it.

Are you sure you understand what Unicode is, and how sockets work?

Sockets are used to transfer byte streams.  If you want to transfer
a python-level object, you have to decide how to encode it as a
byte stream.  For integers, you have to decide whether to use a single
byte, a string of decimal ascii characters, netstring syntax, etc.  For
text, you have to decide what character encoding to use.  For arbitrary
objects, you have to decide what serialisation protocol to use.  etc.

(and yes, the same applies to all other languages.  Java sockets and C
sockets are no different from Python sockets...)

</F> 





From exogen at gmail.com  Sun Feb 13 16:40:23 2005
From: exogen at gmail.com (Brian Beck)
Date: Sun, 13 Feb 2005 16:40:23 -0500
Subject: builtin functions for and and or?
In-Reply-To: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>
References: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>
Message-ID: <cuohlp$ev8$1@eeyore.INS.cwru.edu>

Roose wrote:
> I need this a lot: a one line way to do a n-ary and or 'or'.

Looks like there are itertools recipes for those, similar to what 
Michael just posted. Taken from here: 
http://docs.python.org/lib/itertools-recipes.html

def all(seq, pred=bool):
     "Returns True if pred(x) is True for every element in the iterable"
     for elem in ifilterfalse(pred, seq):
         return False
     return True

def any(seq, pred=bool):
     "Returns True if pred(x) is True for at least one element in the 
iterable"
     for elem in ifilter(pred, seq):
         return True
     return False


--
Brian Beck
Adventurer of the First Order


From steven.bethard at gmail.com  Mon Feb  7 01:52:59 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 06 Feb 2005 23:52:59 -0700
Subject: overwriting method in baseclass
In-Reply-To: <Xns95F64CD37EEF7cpl19ghumspamgourmet@195.20.224.116>
References: <Xns95F64CD37EEF7cpl19ghumspamgourmet@195.20.224.116>
Message-ID: <vaednS_w9N3YjZrfRVn-sA@comcast.com>

Harald Massa wrote:
> Hello!
> 
> I am using a library (= code of so else) within Python. Somewhere in this 
> library there is:
> 
> class foo:
>     	def baa(self, parameters):
>          print "something"
>          self.baazanan(some other parameters)
> 
> 
> class mirbo(foo):
>       def baazanan(self, lalala):
>           print "heylo tada"
> 
> class fujiko(foo):
>       def baazanan(self, ltara):
>           print "sing a song with me"
> 
> 
> ....
> 
> 
> now I want to change the common baa-method. so that
> 
> def baa(self, parameters):
>       print "soemthing special"
>       self.baazanan(some other parameters)
> 
> Of course, I use a Python- and GPL-Licence compatible library, I can 
> change the source of foo, and use my changed library.
> 
> But someday, it happened before, there will be an update by the publisher 
> to that library.... and I have to do all again.
> 
> So, what is the most elegant solution to administer these changes? 

Given these classes:

py> class foo:
...     def baa(self):
...         print "something"
...         self.baazanan()
...
py> class mirbo(foo):
...     def baazanan(self):
...         print "heylo tada"
...
py> class fujiko(foo):
...     def baazanan(self):
...         print "sing a song with me"
...

You should be able to redefine the method and assign it to the foo class:

py> def new_baa(self):
...     print "soemthing special"
...     self.baazanan()
...
py> foo.baa = new_baa

Then any instances created after this assignment should use the new baa 
method you defined:

py> mirbo().baa()
soemthing special
heylo tada
py> fujiko().baa()
soemthing special
sing a song with me

You also might bring up this point to the maintainer of the library -- 
if they know your intents, they can make this easier for you...

STeVe


From mirandacascade at yahoo.com  Thu Feb  3 01:43:04 2005
From: mirandacascade at yahoo.com (mirandacascade at yahoo.com)
Date: 2 Feb 2005 22:43:04 -0800
Subject: python-2.4.msi installation issue
Message-ID: <1107412984.087664.308590@o13g2000cwo.googlegroups.com>

O/S: Windows XP Home (with Service Pack 2)
Downloaded python-2.4.msi from python.org (10,632KB).  When I double
click on the file from Windows Explorer, the installation process
presents the window in which I am prompted to either install for all
users (the default) or install for just me.  I selected the defaulted
value.  Installation process presents a window in which the user may
select the directory for python 2.4 files.  I selected the default
value of the Python24 folder.  After clicking Next, the process
presents a window with the message, "Python 2.4 installer ended
prematurely.  Python 2.4 ended prematurely because of an error.  Your
system has not been modified.  To install this program at a later time,
please run the installation again."

My question is this: how do I determine what the error was that caused
the installation process to end prematurely?



From exogen at gmail.com  Thu Feb 17 10:32:43 2005
From: exogen at gmail.com (Brian Beck)
Date: Thu, 17 Feb 2005 10:32:43 -0500
Subject: Getting milliseconds in Python
In-Reply-To: <slrnd19d00.1ep.curty@einstein.electron.net>
References: <1108565135.167562.196830@z14g2000cwz.googlegroups.com>
	<37h5epF5ck38lU2@individual.net>
	<1108571009.698970.152020@z14g2000cwz.googlegroups.com>
	<cv0100$715$1@eeyore.INS.cwru.edu>
	<mailman.2706.1108577006.22381.python-list@python.org>
	<cv0gru$802$1@eeyore.INS.cwru.edu>
	<slrnd19d00.1ep.curty@einstein.electron.net>
Message-ID: <cv2dkb$97g$1@eeyore.INS.cwru.edu>

Curt wrote:
> Oh, you meant 'seconds / 100 = milliseconds'?
> 
> (canard)

I assume you're suggesting that there are two typos in my original post 
(the * and the 100)...

Despite a millisecond being a thousandth of a second, given the number 
of seconds provided by the time module, he does have to *multiply* by a 
thousand to get the number of milliseconds.

2 seconds * 1000 = 2000 milliseconds

So, aside from the 100 in the original post, it may look misleading, but 
that is what he would need to do...

--
Brian Beck
Adventurer of the First Order


From mahs at telcopartners.com  Thu Feb 17 00:40:47 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 16 Feb 2005 21:40:47 -0800
Subject: renaming 'references' to functions can give recursive problems
In-Reply-To: <1108577159.661733.104710@g14g2000cwa.googlegroups.com>
References: <1108565645.179340.70600@o13g2000cwo.googlegroups.com>	<mailman.2703.1108576441.22381.python-list@python.org>
	<1108577159.661733.104710@g14g2000cwa.googlegroups.com>
Message-ID: <cv1ajk$uvv$1@sea.gmane.org>

peter wrote:
> brain reset and understood 
> 
> thx a lot for all your answers
> 
> Peter
> 
Now that you've got reset, you might want to consider an alternative solution:

def fA(input):
   return input

oldfA = fA   # Hold a reference to the the old function

def newFA(input):
    "Do something new"
    return oldfA(input)

fA = newFA


The advantage of this is that you don't need to change the function newfA at all 
when you're ready to rename it.

Michael



From deetsNOSPAM at web.de  Wed Feb  9 05:18:36 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 09 Feb 2005 11:18:36 +0100
Subject: Confused with methods
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>
	<slrnd0enor.26q.apardon@rcpc42.vub.ac.be>
	<1grmd4z.1tlm4e61650vedN%aleaxit@yahoo.com>
	<slrnd0f07t.26q.apardon@rcpc42.vub.ac.be>
	<1grmg8s.17t7tj4180jdj6N%aleaxit@yahoo.com>
	<slrnd0gsel.26q.apardon@rcpc42.vub.ac.be>
	<cubdtf$cue$04$1@news.t-online.com>
	<slrnd0jhi9.26q.apardon@rcpc42.vub.ac.be>
Message-ID: <36u6bsF574ia3U1@individual.net>

> It doesn't. As Alex has already explained, the above is equivallent to:
> 
> def h(): pass
> 
> class A:
>   l = []
>   f = h
> 
> a = A()
> print a.l is A.l
> print a.f is A.f

So what - the difference is between bound and unbound method, which is what
were talking here about after all - so in the end, its a question of how a
bound method gets created. I'm pretty sure there are plenty of other ways
to create one - try the new module, metaclasses and what not. But that they
exist and are different from unbound methods or functions is not
inconsistent. In the same spirit you could call instance methods in
languages like java or c++ inconsistent - as the have an implicit first
argument, which "normal" functions don't have. So either way round - its a
bit of magic for having oo-style method dispatch. If you want to get rid of
it, don't use OO or at least don't use classes. Nobody prevents you from
doing that.

 
> If I told you that this detail, well not this particular one but
> one that is close to it, will break one of my applications in
> the transition from python 2.3 to 2.4, do you still think
> it is irrelevant?

If its not _this_ detail, its not relevant for _this_ thread. And a general
assertion that transitional changes between versions of python create
problems might be worth a discussion - but that's not what were talking
about here. Instead, we're talking about inconsistencies in _one_ certain
version of python - inconsistencies that no one except you seems to
perceive.

> 
> I would also argue that if a particular detail is a stumbling block
> for someone to understand something it is not that irrelevant
> and that claiming something is inconsistent while it is not,
> is not a good way to remove such a stumbling block.

The OP very well understood the difference between bound and unbound
methods. His confusion was that there was no general currying mechanism
behind it that would create subsequent argument bindings if he stuffed a
method into another class. He now understands better.
> This did bother someone, it was a stumbling block for him understanding
> what was going on.

It did bother him because he didn't understand it in the first place - and
he now does understand it.

Well, I'm well prepared to agree to disagree with you on this. If you feel
its inconsistent, I'm not trying to convince you otherwise. But as I said
before: Even if it _is_ - its still of no practical impact. Also the OP
didn't have any further problems after seeing whats getting on. So lets
move along.

-- 
Regards,

Diez B. Roggisch


From rory at campbell-lange.net  Sun Feb 20 17:30:55 2005
From: rory at campbell-lange.net (Rory Campbell-Lange)
Date: Sun, 20 Feb 2005 22:30:55 +0000
Subject: Newbie CGI problem
In-Reply-To: <cv5920$frm$05$1@news.t-online.com>
References: <mailman.2809.1108746657.22381.python-list@python.org>
	<cv5920$frm$05$1@news.t-online.com>
Message-ID: <20050220223054.GB14977@campbell-lange.net>

On 18/02/05, Peter Otten (__peter__ at web.de) wrote:
> Rory Campbell-Lange wrote:
> 
> > #!/usr/bin/python
> > import cgi
> > print "Content-type: text/html\n\n"
> > print "hi"
> > 
> > Gives me the following in my browser:
> > 
> > '''
> > hi
> > Content-type: text/html
> > 
> > 
> > hi
> > '''
> > 
> > Why are there two 'hi's?
> 
> You have chosen a bad name for your script: cgi.py.
> It is now self-importing. Rename it to something that doesn't clash with the
> standard library, and all should be OK.

Thanks very much. Ouch!
Rory

-- 
Rory Campbell-Lange 
<rory at campbell-lange.net>
<www.campbell-lange.net>


From mahs at telcopartners.com  Mon Feb  7 13:10:08 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Mon, 07 Feb 2005 10:10:08 -0800
Subject: empty classes as c structs?
In-Reply-To: <4207606E.4040806@iinet.net.au>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<7rSdne7BcbDeV57fRVn-jg@comcast.com>	<mailman.1963.1107594941.22381.python-list@python.org>	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>	<mailman.1973.1107618702.22381.python-list@python.org>	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>	<mailman.2006.1107658273.22381.python-list@python.org>	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>	<mailman.2049.1107750700.22381.python-list@python.org>	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com>
	<4207606E.4040806@iinet.net.au>
Message-ID: <cu8amb$ufa$1@sea.gmane.org>

Nick Coghlan wrote:
> Steven Bethard wrote:
> 
>> It was because these seem like two separate cases that I wanted two 
>> different functions for them (__init__ and, say, dictview)...
I see this, but I think it weakens the case for a single implementation, given 
that each implementation is essentially one method.
> 
> The other issue is that a namespace *is* a mutable object, so the 
> default behaviour should be to make a copy
> 
I don't follow this argument.  Why does mutability demand copy?  Given that 
somedict here is either a throwaway (in the classic bunch application ) or a 
dict that must be updated (the wrap-dict case), copying doesn't make much sense 
to me.

OTOH, dict.__init__(dict) copies.  hmmmm....


> I think Michael's implementation also fell into a trap whereby 'E' 
> couldn't be used as an attribute name. The version below tries to avoid 
> this (using magic-style naming for the other args in the methods which 
> accept keyword dictionaries).

You're right - I hadn't considered that.  In case it wasn't obvious, I was 
matching the argspec of dict.  Your solution avoids the problem.
> 
> To limit the special casing in update, I've switched to only using 
> __dict__ for the specific case of instances of namespace

That seems a pity to me.
  (otherwise the
> semantics are too hard to explain). This is to allow easy copying of an 
> existing namespace - 

Can't this be spelled namespace(somenamespace).__copy__()?

 > for anything else, invoking vars() is easy enough.

If there is potential for confusion, I'd be tempted to disallow namespaces as an 
argument to update/__update__

We could use __add__, instead for combining namespaces

> 
> And I was reading Carlos's page on MetaTemplate, so I threw in an extra 
> class "record" which inherits from namespace and allows complex data 
> structures to be defined via class syntax (see the record.__init__ 
> docstring for details). That bit's entirely optional, but I thought it 
> was neat.

Good idea.  The implementation ought to be tested against several plausible 
specializations.
> 
> Finally, I've just used normal names for the functions. I think the 
> issue of function shadowing is best handled by recommending that all of 
> the functions be called using the class explicitly - this works just as 
> well for instance methods as it does for class or static methods.

I don't like the sound of that.  The whole point here - whether as Steven's nice 
straightforward bunch, as originally conceived, or the other cases you and I and 
others have been 'cluttering' the discussion with ;-)  is convenience, and 
readability.  If there are hoops to jump through to use it, then the benefit is 
quickly reduced to zero.

Regards

Michael

> 
> Cheers,
> Nick.
> 
> +++++++++++++++++++++++++++++++++++++++++++++
> 
> from types import ClassType
> 
> class namespace(object):
>     """
>     namespace([namespace|dict]) => object
> 
>     namespace objects provide attribute access to their __dict__
>     Complement of vars:  vars(object) => object.__dict__
> 
>     Non-magic methods should generally be invoked via the class to
>     avoid inadvertent shadowing by instance attributes
> 
>     Using attribute names that look like magic attributes is not
>     prohibited but can lead to surprising behaviour.
> 
>     In general, operations on namespace equate to the operations
>     on namespace.__dict__
>     """
> 
>     def __init__(__self__, __orig__ = None, **__kwds__):
>         """__init__([namespace|dict], **kwds) -> None"""
>         type(__self__).update(__self__, __orig__, **__kwds__)
> 
>     @classmethod
>     def view(cls, orig):
>         """namespace.view(dict) -> namespace
> 
>         Creates a namespace that is a view of the original
>         dictionary. Allows modification of an existing
>         dictionary via namespace syntax"""
>         new = cls()
>         new.__dict__ = orig
>         return new
> 
>     def __repr__(self):
>         return "%s(%s)" % (self.__class__.__name__, repr(self.__dict__))
> 
>     # Recommend calling non-magic methods via class form to
>     # avoid problems with inadvertent attribute shadowing
>     def _checked_update(self, other):
>         try:
>             self.__dict__.update(other)
>         except (TypeError):
>             raise TypeError("Namespace update requires mapping "
>                             "keyed with valid Python identifiers")
> 
>     def update(__self__, __other__ = None, **__kwds__):
>         """type(self).update(self, [namespace|dict], **kwds) -> None
>         equivalent to self.__dict__.update"""
>         # Handle direct updates
>         if __other__ is not None:
>              if isinstance(__other__, namespace):
>                  type(__self__)._checked_update(__self__, 
> __other__.__dict__)
>              else:
>                  type(__self__)._checked_update(__self__, __other__)
>         # Handle keyword updates
>         if __kwds__ is not None:
>             type(__self__)._checked_update(__self__, __kwds__)
> 
> 
> class record(namespace):
>     def __init__(self, definition=None):
>         """record([definition]) -> record
> 
>         Constructs a namespace based on the given class definition
>         Nested classes are created as sub-records
>         Fields starting with an underscore are ignored
>         If definition is not given, uses current class
>         This is handy with subclasses
>         Using subclasses this way has the advantage that the
>         created records are also instances of the subclass.
> 
>         For example:
>         Py> from ns import namespace, record
>         Py> class Record:
>         ...   a = 1
>         ...   b = ""
>         ...   class SubRecord:
>         ...     c = 3
>         ...
>         Py> x = record(Record)
>         Py> x
>         record({'a': 1, 'b': '', 'SubRecord': record({'c': 3})})
>         Py> class Record2(record):
>         ...   a = 1
>         ...   b = ""
>         ...   class SubRecord2(record):
>         ...     c =3
>         ...
>         Py> x = Record2()
>         Py> x
>         Record2({'a': 1, 'b': '', 'SubRecord2': SubRecord2({'c': 3})})
>         """
>         cls = type(self)
>         if definition is None:
>             definition = cls
>         cls.update_from_definition(self, definition)
> 
>     def update_from_definition(self, definition):
>         """type(self).update_from_definition(self, definition) -> None
> 
>         Updates the namespace based on the given class definition
>         Nested classes are created as sub-records
>         Fields starting with an underscore are ignored"""
>         try:
>             for field, default in definition.__dict__.iteritems():
>                 if field.startswith("_"):
>                     continue
>                 if (isinstance(default, (type, ClassType))
>                     and issubclass(default, record)):
>                     # It's a record, so make it an instance of itself
>                     self.__dict__[field] = default()
>                 else:
>                     try:
>                         # If we can make a record of it, do so
>                         self.__dict__[field] = record(default)
>                     except TypeError:
>                         # Throw it in a standard field
>                         self.__dict__[field] = default
>         except AttributeError:
>             raise TypeError("Namespace definition must have __dict__ 
> attribute")
> 



From steven.bethard at gmail.com  Fri Feb 18 18:18:19 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 18 Feb 2005 16:18:19 -0700
Subject: selecting dictionaries to maximize counts
In-Reply-To: <1108761278.019612.279220@l41g2000cwc.googlegroups.com>
References: <oPGdnQfZXPnD0YvfRVn-oQ@comcast.com>
	<1108761278.019612.279220@l41g2000cwc.googlegroups.com>
Message-ID: <cYedne4PLvkq6ovfRVn-vA@comcast.com>

John Machin wrote:
> Steven Bethard wrote:
> 
>> I have a list of dictionaries.  Each dictionary holds counts of
>> various 'words'...
>> ...
>> Basically, I use a greedy approach -- adding a dict each time if I
>> can.
>> ... 
>> This leads to some suboptimal solutions given that, while the total
>> counts must not exceed MAX_VALUE, I'd like them to be as close to
>> MAX_VALUE as possible.  An example of data on which my select
>> function produces such a suboptimal solution:
>>
>> py> countdicts = [
>> ...     dict(a=9, b=9, c=9),
>> ...     dict(a=8, b=7),
>> ...     dict(a=4, b=5, c=12)]
>> py> select(countdicts, 12)
>> [{'a': 9, 'c': 9, 'b': 9}]
>>
>> The better solution would have been to select the second two dicts --
>> then all 'words' would have count 12.
>>
>> I don't need an optimal solution; in fact, the solution I have right
>> now is tolerable.  But if anyone knows a simple way to improve my
>> performance, I'd appreciate it.  Thanks!
> 
> You should specify a function that assigns a score to valid solutions;
> it's not apparent from the wording above and the example exactly what
> that function might be. Thinking through the alternatives might help
> you solve the problem yourself :-)

Yeah, I guess that's a good idea.  Here's a scoring function that should 
give the right range of scores (where 1.0 is perfect and 0.0 is failure):

py> from __future__ import division
py> def score(origdicts, selecteddicts, n):
...     origwords = set(word for d in origdicts for word in d)
...     counts = {}
...     for d in selecteddicts:
...         for word, count in d.iteritems():
...             counts[word] = counts.get(word, 0) + count
...             if counts[word] > n:
...                 return 0.0
...     return sum(counts.itervalues())/len(origwords)/n
...
py> countdicts = [
...     dict(a=9, b=9, c=9),
...     dict(a=8, b=7),
...     dict(a=4, b=5, c=12)]
py> score(countdicts, countdicts, 12)
0.0
py> score(countdicts, select(countdicts, 12), 12)
0.75
py> score(countdicts, [dict(a=8, b=7), dict(a=4, b=5, c=12)], 12)
1.0

It's pretty easy to build a configuration that can't be solved with a 
perfect score:

py> def subsets(lst):
...     if not lst:
...         yield []
...     else:
...         first = lst[:1]
...         for subset in subsets(lst[1:]):
...             yield subset
...             yield first + subset
...
py> countdicts = [
...     dict(a=1, b=2, c=3),
...     dict(a=4, b=5, c=6),
...     dict(a=7, b=8, c=9)]
py> for dicts in subsets(countdicts):
...     print score(countdicts, dicts, 9), dicts
...
0.0 []
0.222222222222 [{'a': 1, 'c': 3, 'b': 2}]
0.555555555556 [{'a': 4, 'c': 6, 'b': 5}]
0.777777777778 [{'a': 1, 'c': 3, 'b': 2}, {'a': 4, 'c': 6, 'b': 5}]
0.888888888889 [{'a': 7, 'c': 9, 'b': 8}]
0.0 [{'a': 1, 'c': 3, 'b': 2}, {'a': 7, 'c': 9, 'b': 8}]
0.0 [{'a': 4, 'c': 6, 'b': 5}, {'a': 7, 'c': 9, 'b': 8}]
0.0 [{'a': 1, 'c': 3, 'b': 2}, {'a': 4, 'c': 6, 'b': 5}, {'a': 7, 'c': 
9, 'b': 8}]

Hmmm...  I can't do an exhaustive search like this one here -- I have 
~8000 dicts, so 2**N is definitely too large of a space to search.  Now 
that I have a scoring routine maybe I could do an A* search though...

Thanks for the input!

STeVe


From jeff at ccvcorp.com  Tue Feb  8 16:18:41 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Tue, 08 Feb 2005 13:18:41 -0800
Subject: Big development in the GUI realm
In-Reply-To: <cub12p$pke$1@achot.icm.edu.pl>
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<4207c8db$0$21623$a1866201@visi.com>
	<cub12p$pke$1@achot.icm.edu.pl>
Message-ID: <110ib3bm4hrbna6@corp.supernews.com>

Maciej Mr?z wrote:

> However, imagine simple situation:
> 1. I write proprietary program with open plugin api. I even make the api 
> itself public domain. Program works by itself, does not contain any 
> GPL-ed code.
> 2. Later someone writes plugin using the api (which is public domain so 
> is GPL compatible), plugin gets loaded into my software, significantly 
> affecting its functionality (UI, operations, file formats, whatever).
> 3. Someone downloads the plugin and loads it into my program

I believe that in this case, the key is *distribution*.

You are not violating the GPL, because you are not distributing a 
program that is derived (according to the GPL's definition of derived) 
from GPL code.

The plugin author *is* distributing GPL-derived code, but is doing so 
under a GPL license.  That's fine too.

The end user is now linking (dynamically) GPL code with your 
proprietary code.  However, he is *not* distributing the linked 
assemblage.  This is allowed under the GPL; its terms only apply when 
distribution takes place.

If the end user is a repackager, and then turns around and distributes 
both sets of code together, then that would (potentially) violate GPL 
terms.  But as long as they're not distributed together, then it's 
okay.  This should even extend to distributing a basic (proprietary) 
plugin and including a document describing where & how to get the 
more-featureful GPL replacement plugin.  (Distributing both programs 
as separate packages on a single installation medium would be a tricky 
edge case.  I suspect it *could* be done in a GPL-acceptable way, but 
one would need to take care about it.)

Of course, this is only my own personal interpretation and opinion -- 
IANAL, TINLA, YMMV, etc, etc.

Jeff Shannon
Technician/Programmer
Credit International



From snacktime at gmail.com  Thu Feb  3 17:10:55 2005
From: snacktime at gmail.com (snacktime)
Date: Thu, 3 Feb 2005 14:10:55 -0800
Subject: bytecode obfuscation
In-Reply-To: <ctu72f$fs3$1@nemesis.news.tpi.pl>
References: <mailman.1837.1107465982.22381.python-list@python.org>
	<ctu72f$fs3$1@nemesis.news.tpi.pl>
Message-ID: <1f060c4c05020314102106374@mail.gmail.com>

> 
> > Everything except the libraries that actually connect to the
> > bank networks would be open source, and those libraries aren't
> > something that you would even want to touch anyways.
> 
> This sounds suspicious to me. Really. Normal payment clearance programs
> have open-spec API's.
> 

I think you might be thinking of api's from companies like Verisign,
which are online payment processors.  Online payment processors in
turn connect to direct processors such as Firstdata, Vital, Global
Payment, etc..  Those direct processors do not have open-spec API's,
at least none of them that I have worked with and I've certified with
most of them at one point or another.


From snail at objmedia.demon.co.uk  Mon Feb 14 18:12:20 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Mon, 14 Feb 2005 23:12:20 +0000
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq1he$cd7$1@news1.ucsd.edu>
	<cuq5du$k7g$1@usenet.otenet.gr> <Xn86U7RhrLECFwD4@objmedia.demon.co.uk>
	<cur8m5$g8h$1@news.freedom2surf.net>
Message-ID: <CmhvEE2UBTECFwBc@objmedia.demon.co.uk>

In message <cur8m5$g8h$1 at news.freedom2surf.net>, Steve Horsley 
<shoot at the.moon> writes
>Stephen Kellett wrote:
>>> Who's "Guido"?
>>   LOL Falling off my chair!!!!!!
>
>I think the expression you are looking for is ROFL!

:-) Yes, but with that I could've been standing up before ending up on 
the floor. I wrote it as I felt it!. Its a really good demonstration as 
to the depth of the research performed by Illias.

I'm waiting for the "Who's Matz?" comment in comp.lang.ruby....

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From miki.tebeka at zoran.com  Mon Feb  7 02:46:02 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Mon, 7 Feb 2005 09:46:02 +0200
Subject: Display subprocess progress
Message-ID: <20050207074541.GH3476@zoran.com>

Hello All,

Any ideas on how to show subprocess progress?

I have a GUI application that launches a subprocess which does some lengthy
work.
What is a good way for the two to communicate so that the GUI can show the
subprocess progress?
(A cross platform solution is best, but windows only OK).

Thanks.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys


From tom.willis at gmail.com  Fri Feb 25 21:54:16 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Fri, 25 Feb 2005 21:54:16 -0500
Subject: Dealing with config files what's the options
In-Reply-To: <421FA05C.4020700@pythonapocrypha.com>
References: <mailman.2952.1109122710.22381.python-list@python.org>
	<slrnd1v6rp.nhu.jgrahn-nntq@frailea.sa.invalid>
	<421FA05C.4020700@pythonapocrypha.com>
Message-ID: <b54d04890502251854320996db@mail.gmail.com>

On Fri, 25 Feb 2005 15:02:04 -0700, Dave Brueck
<dave at pythonapocrypha.com> wrote:
> Jorgen Grahn wrote:
> > On Tue, 22 Feb 2005 20:38:28 -0500, Tom Willis <tom.willis at gmail.com> wrote:
> >
> >>How are the expert pythoneers dealing with config files?
> >
> > ...
> >
> >>Any ideas?
> >
> >
> > How about writing them in Python?
> 
> Depending on who will be editing the config files, this can be a great approach.
> 
> At the simplest level, a config.py file like this is so easy to use:
> 
> # Net settings
> timeoutSec = 5.3
> maxConnections = 3
> 
> # Other stuff
> foo = 'bar'
> 
> This type of a format is easy to use for just about anybody who has ever had to
> use config files before. What's nice is that the code to use it is
> straightforward too:
> 
> import config
> conn = config.maxConnections
> ...
> 
> A few times I've tried to use accessor functions to ensure that the values are
> present or valid or whatever, but I stopped doing that because in practice it's
> just not needed (again, for users who are familiar with the concept of config
> files).
> 
> A slightly more elaborate approach gives you full structure:
> 
> class Net:
>      maxConnections = 12
> 
> class System:
>      class Logging:
>          root = '/var/logs'
> 
> This prevents individual setting names from getting unwieldy, and the code that
> uses it can be pretty readable too:
> 
> logRoot = config.System.Logging.root
> 
> or, if there are lots of retrievals to do:
> 
> Logging = config.System.Logging
> logRoot = Logging.root
> ... etc ...
> 
> Using classes asks a little bit more of the users (they can break it a little
> more easily), but again, in practice it really hasn't been a problem at all.
> 
> -Dave
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
I actually thought of this, and I was kind of on the fence due to the
intended audience.

I don't think it's too much to ask that they are comfy with the
concept of variables. I mean, if it was a shell script they'd be at
the top of the file anyway.

Then again I'm some what hesitant to help them make the connection
that I'm giving them the ability to indirectly edit the code. Kind of
like opening pandoras box. Once the figure out they can open any file
(*.py) with notepad, there will be utter anarchy and I'll get the call
at 4am that somethings wrong with the production data.



-- 
Thomas G. Willis
http://paperbackmusic.net


From circusrat at gmail.com  Thu Feb 17 13:31:31 2005
From: circusrat at gmail.com (jr)
Date: 17 Feb 2005 10:31:31 -0800
Subject: msnp, friends list
Message-ID: <1108665091.090003.59630@c13g2000cwb.googlegroups.com>

I'm currently using the msnp.py code from Manish Jethani's project. I
havn't been able to get the friends list to update like it should. it
works once out of about every 25 times the program loads.

Has anyone been able to implement his code and get the friends list to
actively update? Or have any suggestions?

Any info would be great.
Thanks.



From kanibal at urbanet.ch  Fri Feb  4 07:05:48 2005
From: kanibal at urbanet.ch (Fabrice H)
Date: 4 Feb 2005 04:05:48 -0800
Subject: what version of pyQt are compatible with QT 3.1.1 educational ?
Message-ID: <ca136d6.0502040405.4e12bb48@posting.google.com>

hello
I have QT 3.1.1 educational on my computer (Win XP)
I tried to install several version of pyQt (PyQt edu 3.13 Edu, PyQt
edu 3.6, PyQT non-commercial 4.13, but I still can't import qt module.

when I enter :
import qt
I have the following message :
Import Error : DLL Load failed : cannot find the specified module

do you have any idea please ?

thanks a million in advance !!

Fabrice


From guettli at thomas-guettler.de  Wed Feb 23 10:29:04 2005
From: guettli at thomas-guettler.de (Thomas Guettler)
Date: Wed, 23 Feb 2005 16:29:04 +0100
Subject: running a shell command from a python program
References: <1109170831.815278.243270@f14g2000cwb.googlegroups.com>
Message-ID: <pan.2005.02.23.15.29.04.698760@thomas-guettler.de>

Am Wed, 23 Feb 2005 07:00:31 -0800 schrieb Sandman:

> Hi,
>    I'm a newbie, so please be gentle :-)
> 
> How would I run a shell command in Python?
[cut]
> Is popen the answer? Also, where online would I get access to good
> sample code that I could peruse?

Yes, popen is the answer. I recommend popen4 because it avoids
deadlocks if there is output on stdout and stderr.

Example:
stdout, stdin = popen2.popen4("tidy -q -errors '%s'" % htmlfile)

HTH,
 Thomas

-- 
Thomas G?ttler, http://www.thomas-guettler.de/




From tzot at sil-tec.gr  Fri Feb  4 09:31:12 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Fri, 04 Feb 2005 16:31:12 +0200
Subject: making symlinks with distutils
References: <1107513934.428944.257820@z14g2000cwz.googlegroups.com>
	<pan.2005.02.04.10.59.14.434381@logilab.fr>
	<1107518485.557475.312410@c13g2000cwb.googlegroups.com>
Message-ID: <bm170193tqeu3jfqqkgaelbjlmj3kgn1ok@4ax.com>

On 4 Feb 2005 04:01:25 -0800, rumours say that "Michele Simionato"
<michele.simionato at gmail.com> might have written:

>I guess I need to add a os.link(src, dst) somewhere in the
>setup.py script or in a postinstallation script but I am not exactly
>sure where.

Since you want to make a symbolic link, you probably want to use os.symlink()
and not os.link(), but that seems to be the least of your troubles.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From lars-www at lycos.com  Thu Feb  3 08:49:25 2005
From: lars-www at lycos.com (Lars)
Date: 3 Feb 2005 05:49:25 -0800
Subject: Finding user's home dir
In-Reply-To: <5i9rtc.rq31.ln@orion.homeinvalid>
References: <5i9rtc.rq31.ln@orion.homeinvalid>
Message-ID: <1107438565.585468.260300@f14g2000cwb.googlegroups.com>

Works great with Python 2.3.4 on...
dare I say it...
windows xp

>>> getHomeDir()
'C:\\Documents and Settings\\Lars'

Regards
Lars


Nemesis wrote:
> (..)
> Please, could you test it on your systems and tell me what you got?
> (..)



From apardon at forel.vub.ac.be  Mon Feb  7 07:29:15 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 7 Feb 2005 12:29:15 GMT
Subject: Confused with methods
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>
Message-ID: <slrnd0enor.26q.apardon@rcpc42.vub.ac.be>

Op 2005-02-06, Alex Martelli schreef <aleaxit at yahoo.com>:
>  
>> Isn't that inconsistent?
>
> That Python has many callable types, not all of which are descriptors?
> I don't see any inconsistency there.  Sure, a more generalized currying
> (argument-prebinding) capability would be more powerful, but not more
> consistent (there's a PEP about that, I believe).

I think python is a bit inconsistent here, by using 'def' for
two different things. I think it would have been more consistent
if def always produces a function to be used as such and that
methods had there own keyword. That would make the magic of
bound methods more explicit.

-- 
Antoon Pardon


From nav+posts at bandersnatch.org  Tue Feb  8 11:04:12 2005
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: Tue, 08 Feb 2005 11:04:12 -0500
Subject: Is Python as capable as Perl for sysadmin work?
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
Message-ID: <87r7jr9gxv.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>

"John M. Gabriele" <john_sips_teaz at yahooz.com> writes:

> At some point during some dingy job in the back boiler room
> of Unix, would you find yourself saying, "geez, I'd wish I
> started this with Perl -- Python just isn't cutting it." ?

Sometimes I have to write a quick script in Perl because Python isn't
ubiquitous enough around here, and I often find myself thinking I
the opposite... "Perl just isn't cutting it."

And I spent several years putting food on the table with Perl, so it's
not like I'm a noob with Perl.

Nick

-- 
#  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this to a python
print reduce(lambda x,y:x+chr(ord(y)-1),' Ojdl!Wbshjti!=obwAcboefstobudi/psh?')


From chris.stromberger at gmail.com  Wed Feb  9 09:55:15 2005
From: chris.stromberger at gmail.com (chris)
Date: 9 Feb 2005 06:55:15 -0800
Subject: Python versus Perl ?
In-Reply-To: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
Message-ID: <1107960915.669487.248560@f14g2000cwb.googlegroups.com>

surfunbear at yahoo.com wrote:
> I've read some posts on Perl versus Python and studied a bit of my
> Python book.
>
>  I'm a software engineer, familiar with C++ objected oriented
> development, but have been using Perl because it is great for pattern
> matching, text processing, and automated testing. Our company is
really
> fixated on risk managnemt and the only way I can do enough testing
> without working overtime (which some people have ended up doing) is
by
> automating my testing. That's what got me started on Perl.
>
>  I've read that many people prefer Python and that it is better than
> Perl. However, I want to ask a few other questions.
>

This doesn't directly address your questions, but may be useful for
you, being a C++ programmer.

http://www.strombergers.com/python/

It is biased towards Python, obviously, but shows some practical
differences between Python and Perl that may be of interest.

-Chris



From peter at somewhere.com  Fri Feb 11 08:01:41 2005
From: peter at somewhere.com (Peter Maas)
Date: Fri, 11 Feb 2005 14:01:41 +0100
Subject: PyINI : Cross-Platform INI parser
In-Reply-To: <cuhiak$2gl8$1@mail.cn99.com>
References: <cuhiak$2gl8$1@mail.cn99.com>
Message-ID: <cuhvud$7gm$1@swifty.westend.com>

SeSe schrieb:
> I started a opensource project PyINI for corss-platform *.ini parsing at
> http://sourceforge.net/projects/pyini/
> 
> I have released a simple alpha version, which can read *.ini, with some
> extended features such as "key=value1,value2,value3". I also made a
> c++ binding to PyINI with elmer toolkit.

I suggest that you have a look at Tim Daneliuk's tconfpy serving a
similar purpose. Perhaps you can join forces.

I'd like to see a configuration tool that for Python programmers
is as easy as config.py, i.e. you you have config object and can
write/read it to/from some storage, e.g.

- .ini files
- Java config files
- xml files
- LDAP server
- win32 registry
- ...

It would be nice to make this not a Python only thing but accessible
by other languages like Perl, Ruby, Java, C/C++ ...

I think that a new config utility is worth the effort if it has the
potential to put an end to roll-your-own config formats and parsers.

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From efrat_regev at yahoo.com  Fri Feb 11 07:26:27 2005
From: efrat_regev at yahoo.com (Efrat Regev)
Date: Fri, 11 Feb 2005 06:26:27 -0600
Subject: Python in Makefile Question
References: <MK-dnXqPBfzkHZHfRVn-qw@adelphia.com>
Message-ID: <d86dnaFugamgCZHfRVn-iQ@adelphia.com>


"Efrat Regev" <efrat_regev at yahoo.com> wrote in message
news:MK-dnXqPBfzkHZHfRVn-qw at adelphia.com...
>     Hello,
>
>     I'd like to ask a question concerning a python script in a makefile.
> ...


    Many thanks for the very useful (and very quick) answers!

    Efrat




From john at grulic.org.ar  Tue Feb  1 10:20:58 2005
From: john at grulic.org.ar (John Lenton)
Date: Tue, 1 Feb 2005 12:20:58 -0300
Subject: implicit conversion
In-Reply-To: <41FE2C44.20205@gmx.de>
References: <41FE2C44.20205@gmx.de>
Message-ID: <20050201152058.GA5205@grulic.org.ar>

On Mon, Jan 31, 2005 at 02:01:56PM +0100, Benjamin Schmeling wrote:
> Hi,
> 
> I am working on exposing a bigint class to python.  Now I've got the 
> problem that methods which take an bigint as
> an parameter do not accept Python longs.
> 
> For example:
> import _PythonLiDIA
> x=123L;
> c=_PythonLiDIA.bigint();
> _PythonLiDIA.gcd(c,x);
> 
> 
> Traceback (most recent call last):
> File "test.py", line 132, in ?
>  _PythonLiDIA.gcd(a,x);
> Boost.Python.ArgumentError: Python argument types in
>  _PythonLiDIA.gcd(bigint, long)
> did not match C++ signature:
>  gcd(LiDIA::bigint, LiDIA::bigint)
> 
> I don't know how to achieve implicit conversion at this point, turning an
> long automatically into an bigint. The other way round, turning an bigint
> into long can be realized by defining __long__.
> 
> Can someone help me please?

as later on you say you have a constructor to convert longs into your
bigints, you should add a __coerce__ method to your class.

General description of __coerce__:

  http://docs.python.org/ref/numeric-types.html#l2h-303

details on coercion rules:

  http://docs.python.org/ref/coercion-rules.html

enjoy.

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
BOFH excuse #309:

firewall needs cooling
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From fredrik at pythonware.com  Mon Feb 14 08:19:09 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 14:19:09 +0100
Subject: custom classes in sets
References: <mailman.2510.1108363259.22381.python-list@python.org>
	<1108384013.322546.176060@z14g2000cwz.googlegroups.com>
Message-ID: <cuq8c0$h7q$1@sea.gmane.org>

John Machin wrote:

> Then before you rush and implement something, google around and look in
> the Tools and Scripts directories in the Python distribution; I'm quite
> sure I've seen something like a "duplicate file detector" written in
> Python somewhere.

first google hit:

    http://sebsauvage.net/python/doublesdetector.py

</F> 





From deetsNOSPAM at web.de  Sat Feb 19 13:18:21 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sat, 19 Feb 2005 19:18:21 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr> <cv7k8e$4pa$03$1@news.t-online.com>
	<cv7m2m$gp$1@usenet.otenet.gr> <cv7nh1$b57$03$1@news.t-online.com>
	<cv7r15$lhm$1@usenet.otenet.gr>
Message-ID: <cv7vte$t1g$01$1@news.t-online.com>

> Thank you for the links.
> 
> They are irrelevant for me.

As usual. 

>> Just out of curiousity: How many python extensions are you planning to
>> write?
> 
> I estimate 10 to 100, depending on abstractional capabilities of the
> extension system.
> 
>> And how many lines of pure python code have you written in your life?
> 
> 0 (zero).

Awesome. Without any lines of code written, you have already identified the
areas where python lacks features that have to be overcome with C-written
extensions. As usual, I stand with my mouth agape over your near-psychic
abilities to analyze even the complexest matters without any actual
fiddling with the nitty gritty details. 

The day where you team up with Uri Geller - who will make even the worst
code running by just putting a printout of it on top of an image of the
master himself - is to be feared by all of us humble developers who
actually _deal_ with problems.

-- 
Regards,

Diez B. Roggisch


From bcannon at gmail.com  Tue Feb  1 17:19:15 2005
From: bcannon at gmail.com (IncessantRanting)
Date: 1 Feb 2005 14:19:15 -0800
Subject: Crude statistics on the standard library
In-Reply-To: <41fe5fc7$0$29873$636a15ce@news.free.fr>
References: <41fe5fc7$0$29873$636a15ce@news.free.fr>
Message-ID: <1107296355.304042.81950@z14g2000cwz.googlegroups.com>


F. Petitjean wrote:
[snip]
> Conclusion :
>  sre_compile and sre_parse should be coded with a __all__ attribute

Problem with this is that it would change the API for the two modules.
And the main reason for the dependencies is that sre_constants is
import-star'ed; same with sre_constants.

But yes, it wouldn't hurt to lower them.  But then again people are not
supposed to be using these modules directly; they are there to provide
support to the re module.

>  The standard library contains a module 'tzparse' which cannot be
imported !

It can, but you must have the 'TZ' environment variable set.  It's
deprecated and has been moved to lib-old as of Python 2.5 .

>  Most library modules do not begin with #!/usr/bin/env python and a
> coding cookie.
>

Not all modules are meant to be run as a script.  Plus, with the advent
of the '-m' argument for the interpreter it really isn't necessary.
And as for the encoding cookie, most modules have been around much
longer than that feature so they are almost all ASCII encoded.

-Brett



From fperez.net at gmail.com  Sun Feb  6 15:45:20 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Sun, 06 Feb 2005 13:45:20 -0700
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot><1107487113.732375.110850@c13g2000cwb.googlegroups.com><opslnmywarej1m1c@ashot><mailman.1865.1107491434.22381.python-list@python.org><opsln54fpwej1m1c@ashot>
	<36hculF51ho2sU1@individual.net><1107530489.308497.103530@g14g2000cwa.googlegroups.com><36hrjpF4ui8fbU1@individual.net>
	<mailman.1911.1107546744.22381.python-list@python.org>
	<36i84qF52ce29U1@individual.net> <opslo127s7ej1m1c@ashot>
	<cu0umf$cja$1@sea.gmane.org>
	<mailman.1936.1107561113.22381.python-list@python.org>
	<opslo7jfhqej1m1c@ashot> <36l1dgF52b9d6U1@individual.net>
Message-ID: <cu5vj9$13r$1@sea.gmane.org>

Claudio Grondi wrote:

> It works for me as it is now, so probably it is better to wait for the
> next release of IPython with a cleaner implementation of color
> schemes before further efforts towards support for choosing
> of background colors for each colorized text output in IPython
> via extension of Console.py of the readline module.

Just to clarify something: there's essentially zero chance that the next ipython
version will provide for user-level color scheme customizations in a clean,
friendly way.  I simply have more important improvements I need to work on,
with a very finite amount of time for it all.  If you send me a patch, I'll be
delighted to include it, but otherwise this will take a back seat.

The main reason for this is that I'm starting to play with a rewrite of the
config file system, to move away from a special plain text format, into using
regular python files.  This will bring multiple advantages, and once a true
python syntax is available to users, these kinds of changes can be allowed with
a far cleaner interface than the hacks required right now.

So for now, I'd suggest you live with the hacks, while a better, permanent
solution arrives.  But don't expect that improvement right away.

Regards,

f



From jjl at pobox.com  Sat Feb  5 19:18:01 2005
From: jjl at pobox.com (John J. Lee)
Date: 06 Feb 2005 00:18:01 +0000
Subject: Pickling and inheritance are making me hurt
References: <477dd2xhuk2.ln2@news.conpoint.com>
Message-ID: <87fz0awngm.fsf@pobox.com>

Kirk Strauser <kirk at strauser.com> writes:

> I have a module that defines a Search class and a SearchResult class.  I use
> these classes by writing other modules that subclass both of them as needed
> to interface with particular search engines.
> 
> My problem is that Search defines a method (called automatically by __del__)
                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Don't Do That.  __del__ methods are bad.  They mess up cyclic garbage
collection, IIRC.  ISTR other problems with them, too...


[...]
>     Exception pickle.PicklingError: <pickle.PicklingError instance at
> 0xb7f7ad6c> in <bound method Search.__del__ of <__main__.Search object at
> 0xb7ec954c>> ignored
[...]

...yeah, there's one: thanks for reminding me ;-)

You may want to read up on __getstate__ and __setstate__, BTW.


John


From dieter at handshake.de  Sat Feb 12 14:43:02 2005
From: dieter at handshake.de (Dieter Maurer)
Date: 12 Feb 2005 20:43:02 +0100
Subject: Zope: Adding a layer causes valid output to become an object
	reference?
References: <1108088812.610093.95990@l41g2000cwc.googlegroups.com>
Message-ID: <x73bw1imyh.fsf@handshake.de>

"Junkmail" <junkmail at chipworks.net> writes on 10 Feb 2005 18:26:52 -0800:
> I've been playing with Zope for about a year and took the plunge last
> week into making a product.

You should send Zope related questions to the Zope mailing list.
You will need to subcribe. You can do this at "http://www.zope.org".

> ...
> What doesn't work is when I refer to an object I've created from a
> dtml-var or a tal:content or tal:replace statement.  Instead of the
> proper output I receive: <TextileClass at home> where TextileClass is
> my class name and home is the Object ID I'm referencing.

There is a fundamental difference when you "call" an object
with ZPublisher (i.e. via the Web) and when you use it
in a template.

ZPublisher effectively "calls" "index_html" and if
this is "None", it calls the object.

A template (usually) calls the object (if it is callable) and
then converts the result into a string.


Apparently, your ZInstance is not callable.
Therefore, it is converted into a string.
Apparently, it does not have a custom "__str__",
therefore, you get the standard string conversion for instances
(that's what you see).

> The fact that
> the < and > surround the output make it invisible in the browser and
> had me chasing ghosts for a while.  I'd bet I'm not groking something
> here.

This should not happen in ZPT (unless you use "structure").

> So if I call /home I get the proper HTML output: "<b>What I am looking
> for</b>" but when in another object I reference <dtml-var home> I get:
> "<TextileClass at home>".
> 
> Any thoughts are appreciated.

Call a method on your ZInstance.

To get the same result as via ZPublisher (the Web),
call its "index_html". This may need arguments (I do not know).


Dieter


From danperl at rogers.com  Tue Feb  1 17:29:18 2005
From: danperl at rogers.com (Dan Perl)
Date: Tue, 1 Feb 2005 17:29:18 -0500
Subject: How do you do arrays
References: <tbunce-0102051052450001@192.168.1.12>
Message-ID: <-rWdnWyelepdn53fRVn-oQ@rogers.com>

A solution that I haven't seen mentioned by other postings in the thread is 
to implement the array as a dictionary:

iMatrix = {}
for index in range(majorlop1):
    k = random.choice(listvalues) + 1
    iMatrix[index] = k

Mind you, a dictionary does not behave *exactly* like an array.  For 
instance, in your example, you may later do a "del iMatrix[2]" and then you 
wouldn't really be able to use iMatrix like an array anymore.  But, 
depending on your application, a dictionary may be perfectly suitable.

Hope this helps.

Dan

"Thomas Bunce" <tbunce at mac.com> wrote in message 
news:tbunce-0102051052450001 at 192.168.1.12...
>I am new at Pyton and I am learning from book not classes
> so please forgive my being slow
>
> The below does not work I get an Error of  File
> "Matrix[index] = k
> NameError: name 'iMatrix' is not defined"
>
> while  index < majorlop1:
>   index = index + 1
>   k = random.choice(listvalues) + 1
>   iMatrix[index] = k
>
> The book statement of
> array(typecode, initializer) does not make sence
> to me how it henerates ore relaes to the org name
> for the array.
>
> Thank You
>     Tom 




From wenshengwang at gmail.com  Fri Feb 11 20:29:04 2005
From: wenshengwang at gmail.com (Wensheng)
Date: 11 Feb 2005 17:29:04 -0800
Subject: Loading functions from a file during run-time
References: <1108091598.055004.24890@g14g2000cwa.googlegroups.com>
	<mailman.2389.1108128837.22381.python-list@python.org>
	<1108145070.732098.253550@o13g2000cwo.googlegroups.com>
Message-ID: <1108171744.376627.295890@l41g2000cwc.googlegroups.com>

if the file you want to include is not txt, but instead py, it should
be easy.
for example you have fs.py

you just
-------------------------------------
fs=__import__("fs")
f=[a for a in dir(fs) if a[0:2]!='__']
#no you have f1(),f2(),f3() as f[0],f[1],f[2]
then excute desired function, for example f2():
exec("fs."+f[1]+"()")


if you have top level variable in that file, just modify this to test
typs.FunctionType(import types first)



From mwm at mired.org  Sat Feb 12 19:29:40 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 12 Feb 2005 18:29:40 -0600
Subject: goto, cls, wait  commands
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
	<LGMOd.47294$Z14.32758@news.indigo.ie>
Message-ID: <86k6pd7157.fsf@guru.mired.org>

Alan Kennedy <alanmk at hotmail.com> writes:
>> Secondly, how do I clear screen (cls) from text and other content ?
>
> That depends on
>
> A: What type of display device you're using
> B: What type of interface is being rendered on that display (command
> line, GUI, IDE, etc)
> C: Perhaps what operating system you are using.

D: Whether or not you have a display device at all. I run Python
scripts from Cron whose sole output functionality is via email. I run
Python scripts as daemons whose sole output functionality is syslog.

"Clear screen" doesn't make sense in thsoe two contexts.

       <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From pobrien at orbtech.com  Tue Feb 15 11:52:55 2005
From: pobrien at orbtech.com (Pat)
Date: 15 Feb 2005 08:52:55 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108413376.110181.240600@o13g2000cwo.googlegroups.com>
	<mailman.2574.1108416449.22381.python-list@python.org>
Message-ID: <1108486375.580658.303040@z14g2000cwz.googlegroups.com>

Fredrik Lundh wrote:
> "Pat" wrote:
>
> > A few things.  Primarily the fact that I'm not very experienced in
C
> > (the extensions that I need to have compiled are not written by
me).
> > Secondarily, the fact that the discussion threads I read made it
seem
> > much more complicated than what you just described.
>
> from two posts at the top of this thread:
>
>     "Writing a setup.py and running
>         python setup.py build_ext --compiler=mingw32
>     works for me *without* any more work. Things can't get much
>     simpler."
>
> and
>
>     "The mingw compiler *is* supported through distutils. distutils
>     can straightforwardly be configured to build extensions with
>     mingw."

In my defense, the threads I was referring to were prior to this thread
and did not include the two snippets that you've quoted.  Besides,
there *was* additional work that needed to be done, specifically adding
the python23.dll or python24.dll to the \mingw\lib directory, as you
mentioned in one of your previous posts.  Now, I'm not saying any of
this is rocket science, or isn't fairly easy to overcome.  But it is a
definite stumbling block for someone like myself who is less fluent
with C that you are.

> (now go read Ilias replies to those posts)

I'm not Ilias.  He'll have to fend for himself.  I just happen to have
a similar need to understand how to simplify the process of compiling
extensions for Python in light of the recent changes with Python 2.4.

> > Third, the fact that some of the code we've tried to compile didn't
compile
> > cleanly, the way your cElementTree did (but I can't remember what
exactly
> > the problem was and I didn't do the compiling).
>
> was that code tested under gcc?  code that compiles under visual C
doesn't
> necessarily compile silently under gcc, but fixing that is usually
pretty trivial
> (no worse than porting mostly portable code between platforms).

The code was not written by me.  Specifically, we are making use of
PEAK and the "unofficial" GPL port of Qt for Windows (not the upcoming
GPL version from Trolltech).  I just want it to work.  ;-)

> > And, finally, an aversion to trial-and-error solutions.  I prefer
to Google and
> > ask questions when I'm out of my element.
>
> sure didn't sound that way when you entered this thread:
>
>     "So in an effort to make some headway, I'm going to try to
summarize the
>     current state of affairs.  The bottom line is that compiling C
extension modules
>     on the Windows platform for Python 2.4 is, today, a royal pain in
the ass.
>     Period.  Here's why. /.../"

Okay, I suppose I could have done a better job phrasing that.  I should
have said something like "in my personal opinion, finding definitive,
documented information on the proper way to compile C extensions for
Python in light of the recent changes to Python 2.4 is a royal pain in
the ass."  To that I would now add "But Fredrik Lundh thinks things
can't get much simpler, and if you ask him nicely he'll show you the
error of your ways."  ;-)

> now go download MinGW and figure out what's wrong with your C code.

It isn't my C code.  I'm only including it as a dependency in my
project and trying to make the use of it by my users "simpler than
could ever be conceived by someone who thinks things can't get much
simpler".  ;-)

> if you get stuck, post the error messages, and I'm sure some
c.l.pythoneer
> will help you sort it out.

Thanks.  In all seriousness, you're posts have helped.  When we ran
into snags we tried to compile cElementTree, got a bunch of errors,
figured out we hadn't copied python23.dll into /mingw/lib, and were
able to compile everything we needed.  We still haven't tried that for
Python 2.4 yet, due to other constraints that we haven't worked out.
But I think we are getting closer and your help is greatly appreciated.
 :-)

--
Patrick K. O'Brien
Orbtech    http://www.orbtech.com
Schevo     http://www.schevo.org
Pypersyst  http://www.pypersyst.org



From erikbethke at gmail.com  Mon Feb 21 09:30:08 2005
From: erikbethke at gmail.com (Erik  Bethke)
Date: 21 Feb 2005 06:30:08 -0800
Subject: Detecting the change of screen resolution with SDL or PyGame
Message-ID: <1108996208.418141.56410@c13g2000cwb.googlegroups.com>

Hello All,

I am trying to clean up some polish bugs with the Shanghai game I am
working on and I am currently stuck on trying to get the right event
for detecting when the user has changed the desktop resolution.

I have tried trapping the following events:

1) SDL_ACTIVEEVENT
2) SDL_VIDEOEXPOSE
3) SDL_VIDEORESIZE

These are the events that are passed through to pygame as
pygame.ACTIVEEVENT and so on...

#3 - SDL_VIDEORESIZE  This is what I looked at first and I was wrong,
this is only for the WINDOW being resized... not the desktop resoltion

#2 - SDL_VIDEOEXPOSE  After watching the events in a debugger when I
change the desktop resolution I find out that this IS the event that is
generated from changing the desktop resolution.  Okay no problem right?
 Time to call:

self.screen = self.pygame.display.set_mode( size )

and draw() again right?

Well sure, now my game repaints properly when the desktop resolution
changes.  So What is the problem?  Well now EVERY TIME another window
draws on top of my game's window a SDL_VIDEOEXPOSE event is triggered.
There does not appear to be any flags associated with this event.  So I
am having trouble distinguishing from an overlapping window and
changing the desktop resolution.

So I tried this:

1) call pygame.display.Info() at the startup of my game and save off
this structure
2) call it again after getting a SDL_VIDEOEXPOSE event and comparing to
see if it has changed at all.

The problem with this is that apparantly the VidInfo structure DOES NOT
change when changing desktop resolution...

So then I tried using SDL_ACTIVEEVENT and simply leaving the display
black and unpainted after the user changes the resolution until the
user rolls the mouse over the game window and bringing it back to
focus.

This works.  However, it gets annoying watching the screen repaint
everytime the window gains focus....

Do you guys have any leads for me to try?  This HAS to be a problem
solved many times before...

Thank you,
-Erik



From miki.tebeka at zoran.com  Wed Feb 16 04:05:51 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Wed, 16 Feb 2005 11:05:51 +0200
Subject: "perl -p -i -e" trick in Python?
In-Reply-To: <cuuol5$2ri$1@news1.kornet.net>
References: <cuuol5$2ri$1@news1.kornet.net>
Message-ID: <20050216090549.GI372@zoran.com>

Hello Wonjae,

> I read the comment of
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/277753.
> (Title : Find and replace string in all files in a directory)
> 
> "perl -p -i -e 's/change this/..to this/g'" trick looks handy.
> Does Python have a similar trick? Or, is there a shorter Python recipe for
> the given problem?
See the "fileinput" module.

HTH.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys


From guettli at thomas-guettler.de  Wed Feb 23 04:57:44 2005
From: guettli at thomas-guettler.de (Thomas Guettler)
Date: Wed, 23 Feb 2005 10:57:44 +0100
Subject: assert 0, "foo" vs. assert(0, "foo")
Message-ID: <pan.2005.02.23.09.57.43.578480@thomas-guettler.de>

Hi,

Python 2.3.3 (#1, Feb  5 2005, 16:22:10) [GCC 3.3.3 (SuSE Linux)] on linux2
>>> assert 0, "foo"
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AssertionError: foo
>>> assert(0, "foo")
>>> 

If you use parenthesis for the assert statement, it never
raises an exception.

Up to now I raised strings, but since this is deprecated,
I switched to use the second argument for the assert
statement.

Is it possible to change future python versions, that
assert accept parenthesis?

 Thomas

-- 
Thomas G?ttler, http://www.thomas-guettler.de/




From uche.ogbuji at gmail.com  Mon Feb 28 22:14:09 2005
From: uche.ogbuji at gmail.com (uche.ogbuji at gmail.com)
Date: 28 Feb 2005 19:14:09 -0800
Subject: best XSLT processor?
In-Reply-To: <yvgUd.9678$_G.5042@clgrps12>
References: <yvgUd.9678$_G.5042@clgrps12>
Message-ID: <1109646849.928780.275800@z14g2000cwz.googlegroups.com>

This is a good way to kick off a tussle among interested parties, but
hinestly, at this point, most packages work fine.  In my opinion your
rade-off right now is raw speed (e.g. libxslt) versus flexibility (e.g.
4Suite).  All are bug-free enough that you'd have to be doing somethign
*very* exotic to run into trouble.

Just pick one or two and try them.

http://uche.ogbuji.net/tech/akara/nodes/2003-01-01/python-xslt

--Uche



From nytimes at swiftdsl.com.au  Thu Feb 17 22:50:02 2005
From: nytimes at swiftdsl.com.au (news.sydney.pipenetworks.com)
Date: Fri, 18 Feb 2005 14:50:02 +1100
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <pan.2005.02.18.03.27.10.730881@jerf.org>
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<37hqlrF59l2b2U1@individual.net>
	<873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<421450CC.9080504@swiftdsl.com.au>
	<87psyz8h9o.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<4214A800.4010509@swiftdsl.com.au>
	<pan.2005.02.17.15.13.36.917107@jerf.org>
	<42155DAF.4010806@swiftdsl.com.au>
	<pan.2005.02.18.03.27.10.730881@jerf.org>
Message-ID: <421565EA.5030508@swiftdsl.com.au>

Jeremy Bowers wrote:

> By the way, just to be clear, my infinitesimal's dad can beat up your
> infinitesimal's dad any day of the week.

Ouch....it's getting personal :-). Your dad may be infinitesimal but my 
dad is a complex number (I'm not joking, he really has a real and 
imaginary part).

> (Looks like the Zen mood has passed...)

:-)

Huy


From ods at strana.ru  Thu Feb 10 07:20:13 2005
From: ods at strana.ru (Denis S. Otkidach)
Date: Thu, 10 Feb 2005 15:20:13 +0300
Subject: sre is broken in SuSE 9.2
In-Reply-To: <20050210130042.0f3e49fb.ods@strana.ru>
References: <20050210130042.0f3e49fb.ods@strana.ru>
Message-ID: <20050210152013.146a37a6.ods@strana.ru>

On Thu, 10 Feb 2005 13:00:42 +0300
"Denis S. Otkidach" <ods at strana.ru> wrote:

> On all platfroms \w matches all unicode letters when used with flag
> re.UNICODE, but this doesn't work on SuSE 9.2:
> 
> Python 2.3.4 (#1, Dec 17 2004, 19:56:48) 
> [GCC 3.3.4 (pre 3.3.5 20040809)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import re
> >>> re.compile(ur'\w+', re.U).match(u'\xe4')
> >>> 
> 
> BTW, is correctly recognize this character as lowercase letter:
> >>> import unicodedata
> >>> unicodedata.category(u'\xe4')
> 'Ll'
> 
> I've looked through all SuSE patches applied, but found nothing
> related. What is the reason for broken behavior?  Incorrect configure
> options?

Just a bit more information. test_re.py fails in SuSE 9.2 with the
following errors:

<snip>
Running re_tests test suite
=== Failed incorrectly ('(?u)\\b.\\b', u'\xc4', 0, 'found', u'\xc4')
=== Failed incorrectly ('(?u)\\w', u'\xc4', 0, 'found', u'\xc4')

-- 
Denis S. Otkidach
http://www.python.ru/      [ru]


From irmen.NOSPAM at xs4all.nl  Thu Feb 10 16:55:10 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Thu, 10 Feb 2005 22:55:10 +0100
Subject: XDR? (was Re: is there a safe marshaler?)
In-Reply-To: <mailman.2344.1108071535.22381.python-list@python.org>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>	<mailman.2327.1108055983.22381.python-list@python.org>	<420bd06f$0$28991$e4fe514c@news.xs4all.nl>
	<mailman.2344.1108071535.22381.python-list@python.org>
Message-ID: <420bd83e$0$28990$e4fe514c@news.xs4all.nl>

PA wrote:
> Sorry if this is off-topic, I didn't follow the thread from the very 
> beginning, but wouldn't something like YAML work for you perhaps?
> 
> http://yaml.org/

Perhaps, but the spec makes my skin crawl.
Also, it seems ill-fit for  efficient machine-to-machine
communication (yaml seems to be designed to be easily (?) read/edited
by humans, a thing which I don't require at all).

> https://alt.textdrive.com/pl/

Naah.

--Irmen


From bvande at po-box.mcgill.ca  Sat Feb  5 15:59:00 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Sat, 05 Feb 2005 15:59:00 -0500
Subject: empty classes as c structs?
In-Reply-To: <MIadnXkLYul4hZjfRVn-2Q@comcast.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
	<MIadnXkLYul4hZjfRVn-2Q@comcast.com>
Message-ID: <42053394.6020203@po-box.mcgill.ca>

Steven Bethard said unto the world upon 2005-02-05 14:05:
> Nick Coghlan wrote:
> 
>> Steven Bethard wrote:
>>
>>> Yes -- help me rally behind my generic object PEP which proposes a 
>>> Bunch type (probably to be renamed) for the Python standard lib. =)
>>
>>
>> Did you see the suggestion of 'namespace' as a name?
> 
> 
> Yup, it's in the current PEP draft.  See the "Open Issues" section:
> 
> 
> PEP: XXX
> Title: Generic Object Data Type
> Version: $Revision: 1.0 $
> Last-Modified: $Date: 2004/11/29 16:00:00 $
> Author: Steven Bethard <steven.bethard at gmail.com>
> Status: Draft
> Type: Standards Track
> Content-Type: text/x-rst
> Created: 29-Nov-2004
> Python-Version: 2.5
> Post-History: 29-Nov-2004

<SNIP>

> Open Issues
> ===========
> What should the type be named?  Some suggestions include 'Bunch',
> 'Record', 'Struct' and 'Namespace'.

A quick check of the google groups archive didn't lead me to believe 
that I'm repeating old suggestions, so: how about 'Bag'?

It's has the small virtue of being short and the great virtue of 
employing a good metaphor, I think. A (loose enough) bag takes 
whatever shape you impose on it by the things that you stick into it. 
If I understand the PEP draft aright, the idea is quite similar -- a 
python object with no internal structure other than that imposed by 
what the programmer decides to put into it.

(I'm just a hobbyist, so if this suggestion clashes with some well 
established use of 'Bag' in CS terminology, well, never mind.)

Best to all,

Brian vdB




From mahs at telcopartners.com  Tue Feb  8 22:42:29 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Tue, 08 Feb 2005 19:42:29 -0800
Subject: A ListComp that maintains its own state (Was: Re: turing machine
 in an LC)
In-Reply-To: <1107916460.775437.72320@c13g2000cwb.googlegroups.com>
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>	<87mzuf9gu8.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>	<s9zvf93ovp8.fsf@salmakis.intevation.de>	<pan.2005.02.08.12.47.00.135408@jerf.org>	<s9z8y5yq1fp.fsf@salmakis.intevation.de>	<mailman.2215.1107900386.22381.python-list@python.org>
	<1107916460.775437.72320@c13g2000cwb.googlegroups.com>
Message-ID: <cuc0o8$vtm$1@sea.gmane.org>

Carl Banks wrote:
> 
> Pay attention, chief.  I suggested this days ago to remove duplicates
> from a list.
> 
> from itertools import *
> [ x for (x,s) in izip(iterable,repeat(set()))
>   if (x not in s,s.add(x))[0] ]
> 
> ;)
Sorry,  I gave up on that thread after the first 10 Million* posts.  Who knows 
what other pearls I may have missed?

Anyway, the good news is that you appear to have identified a new design 
pattern, and will soon become very famous:

According to:
http://www.cmcrossroads.com/bradapp/docs/patterns-nutshell.html#Patterns_What

A "pattern" is ...

     * An abstraction from a concrete form which keeps recurring in specific, 
non-arbitrary contexts. [twice in one week]

     * A recurring solution to a common problem [perl-python spam] in a given 
context and system of forces.

     * A named "nugget" of instructive insight, conveying the essence of a 
proven solution to a recurring problem in a given context amidst competing 
concerns. [who could doubt it?]

     * A successfully recurring "best practice" that has proven itself in the 
"trenches". [of this list anyway]

     * A literary format for capturing the wisdom and experience of expert 
designers, and communicating it to novices [I think we're 5 for 5]


So, I would get the book out without further delay, before some other 
Johnny-come-lately lays claim.

BTW, Do you have a 1-line-LC-wiki yet?

Michael


* with due respect to Marvin




From sjuranic at gmail.com  Tue Feb 22 18:49:49 2005
From: sjuranic at gmail.com (Steve Juranich)
Date: Tue, 22 Feb 2005 16:49:49 -0700
Subject: python tutorial/projects
In-Reply-To: <56190b6c050222154816a2e2a3@mail.gmail.com>
References: <cvgf2o$u42$1@agate.berkeley.edu>
	<56190b6c050222154816a2e2a3@mail.gmail.com>
Message-ID: <56190b6c050222154927207e53@mail.gmail.com>

Oops.  The correct URL is http://docs.python.org/tut/tut.html


On Tue, 22 Feb 2005 16:48:48 -0700, Steve Juranich <sjuranic at gmail.com> wrote:
> I think the tutorial offered at www.python.org/tut/tut.html is as good
> a starting place as any.
> 
> I wouldn't be able to suggest a "non-trivial" project without knowing
> more about your background.  Can you do a flashcard program? recipe
> organizer? SETI at Home client? (I think you see where this is going).
> 
> Good luck.
> 
> On Tue, 22 Feb 2005 15:23:37 -0800, Danny
> <dannyant at kingkong.me.berkeley.edu> wrote:
> > Does anyone know of a good python tutorial?
> > I was also looking for some non-trivial projects to do in python.
> >
> > Basically I would like to claim on my resume, that I know python, with
> > out bad karma.
> >
> > Danny
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>


From macrocosm at fastmail.fm  Fri Feb 11 18:14:06 2005
From: macrocosm at fastmail.fm (Arich Chanachai)
Date: Fri, 11 Feb 2005 18:14:06 -0500
Subject: Big development in the GUI realm
In-Reply-To: <18174288.akFrdXrZLZ@jupiter.g2ctech>
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>	<mailman.2092.1107797420.22381.python-list@python.org>	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>	<mailman.2095.1107801722.22381.python-list@python.org>	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>	<4207c8db$0$21623$a1866201@visi.com>	<cub12p$pke$1@achot.icm.edu.pl>	<36sip2F56jjmaU1@individual.net>
	<umzubw8xg.fsf@vh-s.de>	<420cb65f$0$238$edfadb0f@dread12.news.tele.dk>
	<18174288.akFrdXrZLZ@jupiter.g2ctech>
Message-ID: <420D3C3E.3040507@fastmail.fm>

Jorge Luiz Godoy Filho wrote:

>Max M wrote:
>
>  
>
>>GPL is not suitable for all kinds of software. It's nice if you are
>>sharing code with others, but if you are developing something like a
>>desktop application that you want to sell for money, using the GPL is a
>>bad idea.
>>    
>>
>
>If you're earning money, why not pay for the libraries that allowed you to
>do so?
>  
>
Exactly.  But what about those who know how to program but have not a 
cent of money?  I have never seen a commercial license for a library 
which stated that you did not have to pay the license fee until you have 
made that much money in sales from the software which you created, in 
part, from that library.  I would be in favor of such a license, but I 
haven't seen anything of the sort.

>
>Be seeing you,
>Godoy.
>  
>
Be seeing you too, lol. 

- Arich


From Serge.Orlov at gmail.com  Sat Feb 19 06:02:37 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: Sat, 19 Feb 2005 14:02:37 +0300
Subject: Access to formatting controls from within __repr__ or __str__?
References: <m2braiwy23.fsf@unique.fully.qualified.domain.name.yeah.right>
	<1108718706.649402.264600@o13g2000cwo.googlegroups.com>
	<m2zmy1vclh.fsf@unique.fully.qualified.domain.name.yeah.right>
Message-ID: <cv76cr$iuf$1@news.comcor-tv.ru>

Dan Sommers wrote:
> On 18 Feb 2005 01:25:06 -0800,
> "Serge Orlov" <Serge.Orlov at gmail.com> wrote:
>
>> Dan Sommers wrote:
>
>>> So my question is:  Is there a way to pass options "through" a
>>> format string to the __str__ and __repr__ functions?  For example,
>>> can I define my own alternate form for use with the '#' formatting
>>> character, so that '%#s' generates output according to SI
>>> guidelines?
>
>> You can create your own class FmtTemplate like string.Template was
>> done in python 2.4: http://docs.python.org/lib/node105.html
>
> That looks interesting.  Perhaps that will push me into upgrading to
> 2.4 sooner rather than later (I'm *not* looking forward to rebuilding
> all my extensions...).

You don't need to upgrade to Python 2.4. string.Template is a pure
Python code (about 130 lines) and it looks like it's Python 2.2
compatible. My suggestion was to grab it and hack it to add the
feature you want and then keep it in your own library.

  Serge.




From aahz at pythoncraft.com  Sun Feb 13 00:35:10 2005
From: aahz at pythoncraft.com (Aahz)
Date: 13 Feb 2005 00:35:10 -0500
Subject: Kill GIL
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<cum62t$3fb$1@panix2.panix.com>
	<mailman.2463.1108256227.22381.python-list@python.org>
	<868y5t6sal.fsf@guru.mired.org>
Message-ID: <cumoue$9ur$1@panix2.panix.com>

In article <868y5t6sal.fsf at guru.mired.org>, Mike Meyer  <mwm at mired.org> wrote:
>
>Here here. I find that threading typically introduces worse problems
>than it purports to solve.

Depends what you're trying to do with threads.  Threads are definitely a
good technique for managing long-running work in a GUI application.
Threads are also good for handling blocking I/O.  Threads can in theory
be useful for computational processing, but Python provides almost no
support for that.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From circusrat at gmail.com  Thu Feb 17 17:35:23 2005
From: circusrat at gmail.com (jr)
Date: 17 Feb 2005 14:35:23 -0800
Subject: msnp, friends list
In-Reply-To: <mailman.2771.1108671855.22381.python-list@python.org>
References: <1108665091.090003.59630@c13g2000cwb.googlegroups.com>
	<mailman.2771.1108671855.22381.python-list@python.org>
Message-ID: <1108679723.100970.322170@c13g2000cwb.googlegroups.com>

Sorry, I guess what I meant to ask was the status of the friends in the
friends list begin updated. Right now we have a friends list which is
being populated with the correct users, but their status (online,
offline) is never getting set. For some reason the events aren't being
fired??



From wenshengwang at gmail.com  Wed Feb  9 22:37:00 2005
From: wenshengwang at gmail.com (Wensheng)
Date: 9 Feb 2005 19:37:00 -0800
Subject: how can I replace a execfile with __import__ in class to use
	self variables
In-Reply-To: <1107998777.476599.7890@o13g2000cwo.googlegroups.com>
References: <1107998777.476599.7890@o13g2000cwo.googlegroups.com>
Message-ID: <1108006620.737336.166370@o13g2000cwo.googlegroups.com>

I just realized I can pass the object itself:
like
p=__import__("printit")
p.pr(self)

in printit.py
-------------
def pr(self):
    print self.var
-------------------



From dbickett at gmail.com  Wed Feb  2 06:58:45 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Wed, 2 Feb 2005 06:58:45 -0500
Subject: Go visit Xah Lee's home page
In-Reply-To: <200502011540.40216.mail@tuxipuxi.org>
References: <opslhry3yp6yt6e7@news.cisco.com>
	<200502011540.40216.mail@tuxipuxi.org>
Message-ID: <1d6cdae3050202035817a666b7@mail.gmail.com>

I thought we had resolved to stop giving this troll so much negative
attention. Most of us know that that only increases the problem, and
yet now I see a handful of topics at the top-most of this list devoted
solely to him. I think we should go with the idea of a program that
tags his perl-python threads, and simply put him out of mind.

As for your statement in his defense, Michael, his "views" (if one
chooses to give him that much credit) are by no means profound. It
happens to be somewhat of a bandwagon to criticize Bush and cite those
very same "facts". Every now and then I'll get amused by what he is
doing with perl-python, and how he intentionally makes those mistakes,
but then when we have a real conversation it just makes me angry.

-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From pobrien at orbtech.com  Mon Feb 14 14:56:57 2005
From: pobrien at orbtech.com (Pat)
Date: 14 Feb 2005 11:56:57 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2561.1108409059.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108405626.130007.320710@l41g2000cwc.googlegroups.com>
	<mailman.2561.1108409059.22381.python-list@python.org>
Message-ID: <1108411017.507814.229600@c13g2000cwb.googlegroups.com>

Fredrik Lundh wrote:
> "Pat"wrote:
>
> > I thought I was being as clear and specific as I needed to be.
> > Apparently not.  I'm talking about compiling the original source
code
>
> the python source or the extension source?
>
>     > The bottom line is that compiling C extension modules
>
> would indicate the latter.  setup.py handles that just fine, if you
have the
> right tools.  no pain at all.
>
> > Now, if you know something I don't, I'm all ears.  But I don't see
how
> > your suggestion solves my problem.
>
> if your problem is compiling C extension modules, I suggest getting a
> good compiler.  I've done that, and compiling C extension modules is
> no problem at all.
>
> if your problem is that you don't want to use a good compiler, or
that
> your company cannot afford to buy you a compiler, or you have other
> reasons to chose the "pain in the ass" way over the "it just works"
way,
> I'm afraid I cannot help you.  my time's too precious to waste on
inferior
> tools.

Okay, I think we are pretty much talking about the same thing.  My
problem is not that I'm unable or unwilling to purchase a good
compiler.  My problem is that I don't want to make it a requirement of
my users.  The twist is that my users will be working out of a
Subversion repository that includes source code for extensions written
in C.  Those extensions need to be compiled, and the code changes too
frequently for me to want to deal with supplying compiled binaries.

So I'm looking for options for Windows users who do not have, and are
unwilling to get, a Microsoft compiler.  For some users, minGW is an
attractive option.  For those who want to use minGW, I'm trying to
establish whether or not minGW is a viable option, particularly for
Python 2.4.  I was under the impression that there were possible
advantages to compiling Python itself using minGW, but that that
required some patches that hadn't been applied to Python (for reasons
unknown to me).  Said patches are available here:

http://jove.prohosting.com/iwave/ipython/pyMinGW.html

I'm also under the impression that there are possible disadvantages to
compiling Python itself with anything other than the Microsoft's
optimizing compiler, such as performance.  But I haven't seen any
numbers on that, so I don't have information one way or the other.

It may also be the case that minGW can now correctly compile extension
that link to the newer runtime used by Python 2.4, but that wasn't
always the case.  If that's true, that would eliminate the primary
reason for wanting to compile Python itself with minGW, though
philosophical differences with MS might motivate some to want to avoid
the MS compilers altogether.

Perhaps the only thing that's a mess is my understanding of the
situation.  But even if that's the case, I don't think I'm alone, based
on all the threads I've read over the past couple of days.  ;-)

Thanks in advance for any help anyone can offer to reduce my confusion.

Patrick K. O'Brien
Orbtech    http://www.orbtech.com
Schevo     http://www.schevo.org
Pypersyst  http://www.pypersyst.org



From petr at tpc.cz  Thu Feb 17 18:21:12 2005
From: petr at tpc.cz (McBooCzech)
Date: 17 Feb 2005 15:21:12 -0800
Subject: Fuzzy matching of postal addresses
In-Reply-To: <mailman.875.1106093219.22381.python-list@python.org>
References: <mailman.875.1106093219.22381.python-list@python.org>
Message-ID: <1108682472.028307.92060@o13g2000cwo.googlegroups.com>

Tim,

do you think Ferbel can parse properly with non English data-sets? I
mean do you think it will work properly with data they include non
English characters as well? As we live in Europe, we have to solve such
a problems here :)))) If the software needs some changes, I am ready,
according to your suggestions, to try to do it.

Regards

Petr Jakes



From alan.gauld at btinternet.com  Mon Feb 28 16:52:09 2005
From: alan.gauld at btinternet.com (Alan Gauld)
Date: Mon, 28 Feb 2005 21:52:09 +0000 (UTC)
Subject: Newbie question
References: <cvv8k2$19ov$1@newsreader02.ops.uunet.co.za>
Message-ID: <7i4721hieium1hls578fmjhs2et8ugc18j@4ax.com>

On Mon, 28 Feb 2005 16:17:03 +0200, "Ryan White"
<greenmonkey at foo.com> wrote:

> How do I display an image in Python? - I've run over Tkinter, but obviously
> in all the wrong places.

Someone else suggested PIL.

But in Tkinter you create a PhotoImage object then insert it into
either a Canvas or a Text widget.

> Any help or sample code would be much appreciated.

If you find the file hmgui.zip on Useless Python you will find
the code for my games framework with an example Hangman game in
Tkinter. It includes the display of a set of images(the hanged
man)

HTH,

Alan G.
Author of the Learn to Program website
http://www.freenetpages.co.uk/hp/alan.gauld


From surfunbear at yahoo.com  Sun Feb  6 08:19:09 2005
From: surfunbear at yahoo.com (surfunbear at yahoo.com)
Date: 6 Feb 2005 05:19:09 -0800
Subject: Python versus Perl ?
Message-ID: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>


 I've read some posts on Perl versus Python and studied a bit of my
Python book.

 I'm a software engineer, familiar with C++ objected oriented
development, but have been using Perl because it is great for pattern
matching, text processing, and automated testing. Our company is really
fixated on risk managnemt and the only way I can do enough testing
without working overtime (which some people have ended up doing) is by
automating my testing. That's what got me started on Perl.

 I've read that many people prefer Python and that it is better than
Perl. However, I want to ask a few other questions.


1. Perl seems to have alot of packaged utilities available through
CPAN, the comprehensive perl network. These can aid in building
parsers, web development, perl DBI is heavily used. This seems to be a
very important benifit. I'm not sure that Python is as extenive at all
in that regard ? Perl also has excellent pattern matching compared to
sed, not sure about how Python measures up,
 but this seems to make perl ideally suited to text processing.

2. Python is apparantly better at object oriented. Perl has some kind
of name spacing, I have used that in a limited way. Does Perl use a
cheap and less than optimal Object oriented approach ?
That was what someone at work said, he advocates Python.
Is it likely that Perl will improve it's object oriented features
in the next few years ?

3. Perl is installed on our system and alot of other systems.
You don't have to make sys admins go out of there way to make it
available. It's usualy allready there. I also did a search of job
postings on a popular website. 108 jobs where listed that require
knowledge of Perl, only 17 listed required Python. Becomeing more
familiar with Perl might then be usefull for ones resume ?



 If Python is better than Perl, I'm curious how really significant
those advantages are ?



From kp8 at mac.com  Tue Feb  1 18:55:54 2005
From: kp8 at mac.com (kpp9c)
Date: 1 Feb 2005 15:55:54 -0800
Subject: permutations, patterns, and probability
Message-ID: <1107302154.447284.100740@o13g2000cwo.googlegroups.com>

Greetings,

I am working on a program to produce patterns. What would like is for
it to  exhaustively produce all possible permutations of a sequence of
items but for each permutation produce variations, and also a sort of
stutter based on probability / weighted randomess.

Let us say we have tiles of four primary colors: ['Red', 'Blue',
'Green', 'Yellow']. Now we also have 4 alternatives or substitutes for
each color ['Maroon', 'Navy_Blue', 'Forest_Green', 'Dark_Brown']

We pick a unique permutation, say: ['Red', 'Blue', 'Yellow', 'Green']

Now I would like to pick the primary colors substitute (say 30% chance
for each element) so instead of our plain

['Red', 'Blue', 'Yellow', 'Green']

we might end up with:

['Red', 'Navy_Blue', 'Yellow', 'Forest_Green']

or

['Maroon', 'Navy_Blue', 'Yellow', 'Green']

Whatever... The main point is that sometimes the original color is
retained and sometimes the dark color is substituted.

Now I want to take this list and sometimes stutter an element so that
there is, let us say a 50% chance for each element, that it is
stuttered, and it may be repeated 1 (34%), 2(66%), or 3(33%) times. So
that we could get:

['Maroon','Maroon','Navy_Blue', 'Yellow','Yellow','Yellow','Yellow',
'Green']

The program would quit when all 24 (in the case of 4 elements) was
exhausted.

I have code that makes weighted randomness. I have code that makes
permutations, but I am having trouble putting this all together...
While i work on it though that i might ask for help... I'd like for the
code to be reusable and am building a library of functions for
patterns.

cheers,
kevin


### This is not mine, it is from a python book... I believe the Lutz
book

def permute(list):
if not list:                                        # shuffle any
sequence
return [list]                                   # empty
sequence
else:
res = []
for i in range(len(list)):
rest = list[:i] + list[i+1:]                # delete
current node
for x in permute(rest):                     # permute the
others
res.append(list[i:i+1] + x)             # add node at
front
return res

mport random

### This this is mine, but seems to work anyway hee hee

def windex(lst):
'''an attempt to make a random.choose() function that makes
weighted choices

accepts a list of tuples with the item and probability as a
pair
like: >>> x = [('one', 0.25), ('two', 0.25), ('three', 0.5)]
>>> y=windex(x)'''
n = random.uniform(0, 1)
for item, weight in lst:
if n < weight:
break
n = n - weight
        return item



From jello at comics.com  Fri Feb 11 12:07:34 2005
From: jello at comics.com (rzed)
Date: Fri, 11 Feb 2005 17:07:34 GMT
Subject: namespaces module (a.k.a. bunch, struct, generic object,
	etc.) PEP
References: <GaudndOHLML3M5bfRVn-vg@comcast.com>
	<pan.2005.02.10.15.10.26.594432@jerf.org>
	<4edc17eb.0502110255.1554217b@posting.google.com>
	<mailman.2384.1108124642.22381.python-list@python.org>
	<pan.2005.02.11.11.49.35.869566@jerf.org>
Message-ID: <Xns95FA7C434508Cjreeder@63.223.5.95>

Jeremy Bowers <jerf at jerf.org> wrote in
news:pan.2005.02.11.11.49.35.869566 at jerf.org: 

> On Fri, 11 Feb 2005 22:23:58 +1000, Nick Coghlan wrote:
>> This is one of the reasons why Steven's idea of switching to
>> proposing a new module is a good one. It then provides a
>> natural location for any future extensions of the idea such as
>> Records (i.e. namespaces with a defined set of legal fields)
>> and NamedTuples and NamedLists (i.e. namespaces with a defined
>> field order) 
> 
> I'm not very good at reading Guido's mind, but it might be worth
> feeling out whether mentioning this will improve the chances of
> this passing or not, because while I do not know, can not know,
> and am not trying to predict, it is at least possible that Guido
> may feel as I have been: That this proposal on its own isn't
> that exciting, but as the foundation of some *other* standard
> functionality as described it might be very good. In that case
> that should be emphasized. 
> 
> See, now it still doesn't make me jump up and down because I can
> write what I need fairly easily, but it would be a great boon to
> beginners or people who just want to do work and re-write this
> again, but slightly differently, and would also provide some
> standardization where otherwise we all roll our
> not-quite-similar-enough implementations, which would help us
> read each other's code. 
> 
> Y'all are bringing me around, slowly but surely :-)

Yes, it seems that the main benefit is to provide a Python-standard 
way of doing something that many individuals see as useful. Like 
many others, I've implemented my own variation (a class I call 
Data) to do essentially the same thing as the bunch/namespace 
proposal. If there had already been an existing standard way to do 
it, I would at most have needed to subclass the standard method. 

I would bet that subclassing is *still* going to be common, though, 
as each of us individually roll our own version to get that one 
vital feature the standard doesn't cover (for me, it's update with 
numerous other types), so the net effect may actually not be all 
that different from what happens now. Still, I could happily give 
up some features as long as the functionality is still available 
and presuming I intended the code for public consumption, and for 
that, Namespace would be most useful. 

Though I'd like it to have a shorter name. I'm lazy.

-- 
rzed



From luke at tatooine.planet  Mon Feb  7 08:01:20 2005
From: luke at tatooine.planet (Luke Skywalker)
Date: Mon, 07 Feb 2005 14:01:20 +0100
Subject: WYSIWYG wxPython "IDE"....?
References: <1107560658.584623.303310@o13g2000cwo.googlegroups.com>
	<4205fcd9@news.highway1.com.au>
	<1107751731.066796.295170@g14g2000cwa.googlegroups.com>
	<cu7hcf$1ek$1@online.de>
Message-ID: <47pe019efj34ua4o5pjjarlv3i85pa9048@4ax.com>

On Mon, 07 Feb 2005 11:54:08 +0100, Uwe Grauer <news at grauer-online.de>
wrote:
>Most People don't realize, that they have to use the cvs-version
>instead.

It's rather that most people prefer to use the latest stable version,
since stuff under CVS is still under development. Does someone know
why the Boa people didn't extract a newer, stable version from CVS?

To the OP: This topic comes up about every week, and the conclusion I
drew after taking a look, is that Python is not a good solution to
build GUI apps, although it's an excellent command-line, text
scripting tool.

To me, the very fact that the only solution if you don't want to carry
a multi-megabyte widget set with you (either wxWidgets or QT is to go
the MFC way (which a lot of C developers seem to hate) through
PyWin32, and the absence of a really good GUI builder like VB or
Delphi shows that it's just not a good solution to build big GUI apps,
although good enough for smaller apps like BitTorrent etc. Sad, but
true. I guess it just shows that building a GUI development tool like
those two takes quite a lot of work, hence money, but there doesn't
seem to be a demand high enough to warrant this venture.

My conclusion: If you want to write GUI apps that require a very rich
interface while keeping the installer small (and raw performance is
important), Python is currently not a good solution. YMMV :-)

Luke.


From tzot at sil-tec.gr  Thu Feb 10 17:41:00 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Fri, 11 Feb 2005 00:41:00 +0200
Subject: Pioneers of WIMPishness (was: A great Alan Kay quote)
References: <420a5c1e$0$21630$a1866201@visi.com>
	<420a6491$0$29509$a1866201@visi.com>
	<mailman.2270.1107980587.22381.python-list@python.org>
	<420ab9c9$1@nntp0.pdx.net> <c6vqd2-bqv.ln1@lairds.us>
Message-ID: <dnon01hldebbrmvvj97hchfq4sl1s4atmm@4ax.com>

On Thu, 10 Feb 2005 03:08:11 GMT, rumours say that claird at lairds.us (Cameron
Laird) might have written:

>I entirely agree that Engelbart deserves full recognition for his
>achievements.  At the same time, I think we also should note that
>Ted Nelson was publishing articles about "hypertext" in '65, and
>Vannevar Bush lucidly explained his vision for textual linking in
>'45.  With a little provocation, I can push the ideas of "mechanical"
>or "machine" referencing back at least to the Enlightenment, and
>arguably much farther.

Like ??????????
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From steven.bethard at gmail.com  Mon Feb  7 15:59:15 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 07 Feb 2005 13:59:15 -0700
Subject: loops -> list/generator comprehensions
In-Reply-To: <opslu02rho1js0xs@news.telkomsa.net>
References: <1107718117.221204.80410@l41g2000cwc.googlegroups.com>
	<opsls54qat1js0xs@news.telkomsa.net>
	<4qCdnXI11-vhGJvfRVn-vQ@comcast.com>
	<opsls8buf21js0xs@news.telkomsa.net>
	<asSdncm4c9J1DJvfRVn-gw@comcast.com>
	<opslu02rho1js0xs@news.telkomsa.net>
Message-ID: <H8adndOeq8AAS5rfRVn-3A@comcast.com>

Caleb Hattingh wrote:
>> Would
>>
>>      filenames = [os.path.join(dirpath, filename)
>>                   for dirpath, dirnames, filenames in os.walk('.')
>>                   for filename in filenames]
>>
>> have been clearer for you?  Then all you have to do is remember the  
>> order of the for-loop execution:
> 
> Bizarre as this may sound, it was the '_' that was throwing me off the  
> whole thing (at the 'grok' level I generally read the newsgroup,  
> anyway).   For some weird reason, I can read *this* comprehension 
> pretty  easily!  Does that make sense at all?  I figure a little bit of  
> uncertainty along the way probably derails understanding of the whole  
> thing a little bit

Yup, actually, that's what I kinda suspected happened.  But if it 
happened for you, it probably happened for a dozen other folks who read 
the same thing, so I'm glad to hear rewriting it and explaining the '_' 
was helpful.

STeVe


From fbasegmezatbcdidotcom  Fri Feb  4 22:38:46 2005
From: fbasegmezatbcdidotcom (Fahri Basegmez)
Date: Fri, 4 Feb 2005 22:38:46 -0500
Subject: returning True, False or None
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
Message-ID: <6Z6dnVfTmdUDopnfRVn-1A@rcn.net>

reduce(lambda x, y: x or y, lst)

works but when I tried

import operator
reduce(operator.or_, lst)

this did not work.  It pukes

Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
TypeError: unsupported operand type(s) for |: 'NoneType' and 'bool'

Any comments?

Fahri




From sjmachin at lexicon.net  Wed Feb 16 21:30:01 2005
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 17 Feb 2005 13:30:01 +1100
Subject: Help with C extensions under VC6 / WinXP and Python 2.4
References: <mailman.2731.1108605453.22381.python-list@python.org>
Message-ID: <s30811dnlp51u3t1td3s6q0efp7b3m2ma0@4ax.com>

On Wed, 16 Feb 2005 20:57:18 -0500, Scott
<scott+python at CS.Princeton.EDU> wrote:

>I've installed Python 2.4 under WinXP and am attempting to
>create an extension module using the steps outlined here:
>http://python.org/doc/2.4/ext/win-cookbook.html
>
>I'm specifically trying to perform step 6. Creating a brand
>new project using VC6.
>
>The trouble I have is that there are no PC or PCbuild
>subdirectories in C:\Python24.  Where do I find these?

As the quoted URL says (2nd para):
"""
To build extensions using these instructions, you need to have a copy
of the Python sources of the same version as your installed Python.
[snip]
The example files described here are distributed with the Python
sources in the PC\ example_nt\ directory
"""

i.e. you have to download a copy of the Python source distribution.

>
>Ultimately, what I want to do is interface some Python
>code with a DLL that controls an A/D board.  I expect
>I'll need to write an extension module to act as a shim
>between this DLL and the Python code.

Possibly not; check out the ctypes module --
http://starship.python.net/crew/theller/ctypes/

but *do* please read the docs before posting :-)

HTH,
John


From __peter__ at web.de  Mon Feb  7 17:01:55 2005
From: __peter__ at web.de (Peter Otten)
Date: Mon, 07 Feb 2005 23:01:55 +0100
Subject: "Collapsing" a list into a list of changes
References: <dvOMd.33656$EG1.19314@lakeread04>
	<mailman.2034.1107725421.22381.python-list@python.org>
	<cu7532$er8$01$1@news.t-online.com>
	<200502071907.12169.francis.girard@free.fr>
	<mailman.2097.1107802306.22381.python-list@python.org>
	<cu8jlk$5v9$00$1@news.t-online.com>
	<mailman.2109.1107809699.22381.python-list@python.org>
Message-ID: <cu8ogo$t3o$01$1@news.t-online.com>

John Lenton wrote:

> On Mon, Feb 07, 2005 at 09:39:11PM +0100, Peter Otten wrote:
>> John Lenton wrote:
>> >                                         For example, the fastest way
>> > to get the factorial of a (small enough) number in pure python is
>> > 
>> >   factorial = lambda n: reduce(operator.mul, range(1, n+1))
>>  
>> I see that you are seduced by the beauty of the expression. Otherwise, if
>> you would really care for speed:
>> 
>> [...]
> 
> that's cheating: you moved the calculation into the setup. You aren't
> timing what you say you are.

*You* are cheating when you take a predefined function implemented in C
(operator.mul) and then claim you are using pure Python. This gives you the
extra 50 percent that overcompensate the inefficiency of reduce() -- but
only by a hair's breadth:

$ python2.4 -m timeit -s'mul = lambda x, y: x * y' -s'a=1' 'mul(a, a)'
1000000 loops, best of 3: 0.522 usec per loop
$ python2.4 -m timeit -s'from operator import mul' -s'a=1' 'mul(a, a)'
1000000 loops, best of 3: 0.345 usec per loop


Peter






From nessus at mit.edu  Mon Feb 28 18:25:51 2005
From: nessus at mit.edu (Douglas Alan)
Date: Mon, 28 Feb 2005 18:25:51 -0500
Subject: yield_all needed in Python
Message-ID: <lck6osnu68.fsf@gaffa.mit.edu>

While writing a generator, I was just thinking how Python needs a
"yield_all" statement.  With the help of Google, I found a
pre-existing discussion on this from a while back in the Lightweight
Languages mailing list.  I'll repost it here in order to improve the
chances of this enhancement actually happening someday.  The original
poster from the LL mailing list seems mostly concerned with
algorithmic efficiency, while I'm concerned more about making my
programs shorter and easier to read.  The ensuing discussion on the LL
list talks about how yield_all would be somewhat difficult to
implement if you want to get the efficiency gain desired, but I don't
think it would be very difficult to implement if that goal weren't
required, and the goal were limited to just the expressive elegance:

     A Problem with Python's 'yield'

         * To: LL1 Mailing List <address at hidden>
         * Subject: A Problem with Python's 'yield'
         * From: Eric Kidd <address at hidden>
         * Date: 27 May 2003 11:15:20 -0400
         * Organization:
         * Sender: address at hidden

     I'm going to pick on Python here, but only because the example code will
     be short and sweet. :-) I believe several other implementations of
     generators have the same problem.

     Python's generator system, used naively, turns an O(N) tree traversal
     into an O(N log N) tree traversal:

       class Tree:
           def __init__(self, value, left=None, right=None):
               self.value = value
               self.left = left
               self.right = right

           def in_order(self):
               if self.left is not None:
                   for v in self.left.in_order():
                       yield v
               yield self.value
               if self.right is not None:
                   for v in self.right.in_order():
                       yield v

       t=Tree(2, Tree(1), Tree(3))
       for v in yield_bug.t.in_order():
           print v

     This prints:
       1
       2
       3

     Unfortunately, this snippet calls 'yield' 5 times, because the leaf
     values must be yielded twice on their way back up the tree.

     We can shorten the code--and make it run in O(N) time--by adding a new
     keyword to replace the "for v in ...: yield v" pattern:

       def in_order(self):
           if self.left is not None:
               yield_all self.left.in_order():
           yield self.value
           if self.right is not None:
               yield_all self.right.in_order():

     Interestingly enough, this allows you define notions such as
     "tail-recursive generation", and apply the usual bag of
     recursion-optimization techniques.

     Cheers,
     Eric

|>oug


From pipedreamergrey at gmail.com  Thu Feb 17 01:28:21 2005
From: pipedreamergrey at gmail.com (pipedreamergrey at gmail.com)
Date: 16 Feb 2005 22:28:21 -0800
Subject: PythonCard and Py2Exe
In-Reply-To: <jOCdnY_u55-Ta47fRVn-3w@powergate.ca>
References: <1108476282.790371.155670@l41g2000cwc.googlegroups.com>
	<mailman.2620.1108476543.22381.python-list@python.org>
	<1108484617.908022.280320@l41g2000cwc.googlegroups.com>
	<acq57pnf.fsf@python.net>
	<1108604319.052270.170430@l41g2000cwc.googlegroups.com>
	<jOCdnY_u55-Ta47fRVn-3w@powergate.ca>
Message-ID: <1108621701.919626.136070@o13g2000cwo.googlegroups.com>

The Error:

(Most recent call last):
C:\Documents and Settings\Gateway User\ Desktop\custdb\setup.py", line
1,

name = "custdb",
     'setup' is not defined


There may be a single word infront of 'setup' on the fourth line, it
scramble on my screen because I have to use a screen capture to read
the error (it pops up for just a second before the window shuts down.
Here's the full setup.py script I ran to get the error:

from distutils.core import setup
import py2exe

setup( name = "custdb",
       console = ["custdb.py"],
       data_files = [ (".", ["custdb.ini", "custdb.de.rsrc.py"
"custdb.rsrc.py", "customerdata.csv"]) ]
       ) 

*note: "data_files" is all one line in my Python IDLE



From trentm at ActiveState.com  Thu Feb 10 19:31:07 2005
From: trentm at ActiveState.com (Trent Mick)
Date: Thu, 10 Feb 2005 16:31:07 -0800
Subject: ANN: ActivePython 2.3.5.236 and ActivePython 2.4.0.244 are available
Message-ID: <420BFCCB.2020207@activestate.com>

I'm pleased to announce that ActivePython 2.3.5 build 236 and
ActivePython 2.4.0 build 244 are now available from:

     http://www.ActiveState.com/Products/ActivePython

ActivePython 2.3.5.236 is a bug-fix release matching core Python 2.3.5.
ActivePython 2.4.0.244 is a bug-fix release matching core Python 2.4.0.
Both of these releases contain an important security fix for
SimpleXMLRPCServer as detailed here:

     http://www.activestate.com/Products/ActivePython/advisory.plex
     http://www.python.org/security/PSF-2005-001/

Builds for Linux, Solaris and Windows are available.

We would welcome any and all feedback to:
     ActivePython-feedback at ActiveState.com
Please file bugs against ActivePython at:
     http://bugs.ActiveState.com/ActivePython


What is ActivePython?
---------------------

ActivePython is ActiveState's quality-assured binary build of Python.
Builds for Windows, Linux and Solaris and made freely available.

ActivePython includes the Python core and core extensions (zlib 1.2.1,
bzip2 1.0.2, bsddb 4.2.52, Tk 8.4.4, and Tix 8.1.4). On Windows,
ActivePython includes the PyWin32 suite of Windows tools developed by
Mark Hammond, including bindings to the Win32 API and Windows COM, the
Pythonwin IDE, and more.

ActivePython also includes a wealth of Python documentation, including:
- the core Python docs
- Andrew Kuchling's "What's New in Python" series
- the Non-Programmer's Tutorial for Python
- Mark Pilgrim's excellent "Dive into Python", and
- a snapshot of the Python FAQs, HOWTOs and PEPs.

An online version of the docs can be found here:
     http://aspn.activestate.com/ASPN/docs/ActivePython/2.3/welcome.html
     http://aspn.activestate.com/ASPN/docs/ActivePython/2.4/welcome.html
In particular the Release Notes:
     http://aspn.activestate.com/ASPN/docs/ActivePython/2.3/relnotes.html
     http://aspn.activestate.com/ASPN/docs/ActivePython/2.4/relnotes.html
and the Installation Guide:
http://aspn.activestate.com/ASPN/docs/ActivePython/2.3/installnotes.html
http://aspn.activestate.com/ASPN/docs/ActivePython/2.4/installnotes.html


Extra Bits
----------

This release of ActivePython also includes the following packages:

- a Windows "debug" package: debug-built binaries for ActivePython
   users building debug versions of their binary Python extensions
- ActivePython23.chm & ActivePython24.chm: an MS compiled help
   collection of the full ActivePython documentation set. Linux
   users of applications such as xCHM might find this useful.

These packages are available from:
     ftp://ftp.activestate.com/ActivePython/etc/

On behalf of the team at ActiveState,
Thanks, and enjoy!

-- 
Trent Mick
trentm at activestate.com







From steven.bethard at gmail.com  Tue Feb 15 11:21:22 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 15 Feb 2005 09:21:22 -0700
Subject: check if object is number
In-Reply-To: <slrnd13cj0.u1q.apardon@rcpc42.vub.ac.be>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
	<374ho0F560ughU1@individual.net>
	<66WdnbJbuf5yj5DfRVn-iA@comcast.com>
	<slrnd13cj0.u1q.apardon@rcpc42.vub.ac.be>
Message-ID: <O_KdnUCIV6gfvI_fRVn-jQ@comcast.com>

Antoon Pardon wrote:
> Op 2005-02-11, Steven Bethard schreef <steven.bethard at gmail.com>:
> 
>>George Sakkis wrote:
>>
>>>"Steven Bethard" <steven.bethard at gmail.com> wrote in message
>>>news:gcidnb9g_ojxnpDfRVn-tA at comcast.com...
>>>
>>>
>>>>Is there a good way to determine if an object is a numeric type?
>>>
>>>In your example, what does your application consider to be numeric?
>>
>>Well, here's the basic code:
>>
>>def f(max=None):
>>     ...
>>     while max is None or n <= max:
>>         ...
>>         # complicated incrementing of n
>>
>>So for 'max', technically all I need is <= support.  However, the code 
>>also depends on the fact that after incrementing 'n' enough, it will 
>>eventually exceed 'max'.  Currently, ints, longs, floats, and Decimals 
>>will all meet this behavior.
> 
> Actually no, floats don't meet this behaviour or more specifically
> floats don't guarantee this behaviour. It depends of course on
> your implementation of f, but it is possible with floats to keep
> incrementing and never reach a maximum.

My code won't hit this corner case.  I'm incrementing with integers.

Steve


From Serge.Orlov at gmail.com  Thu Feb 24 07:05:25 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: 24 Feb 2005 04:05:25 -0800
Subject: LC_ALL and os.listdir()
In-Reply-To: <Xns96076F2D5A37Bduncanrcpcouk@127.0.0.1>
References: <mailman.2959.1109142240.22381.python-list@python.org>
	<421cf088$0$8788$9b622d9e@news.freenet.de>
	<cvitch$111q$1@news.comcor-tv.ru>
	<421cff55$0$16589$9b622d9e@news.freenet.de>
	<Xns96076F2D5A37Bduncanrcpcouk@127.0.0.1>
Message-ID: <1109246725.904797.17110@g14g2000cwa.googlegroups.com>

Duncan Booth wrote:
> Martin v. L?wis wrote:
>
> > Serge Orlov wrote:
> >> Shouldn't os.path.join do that? If you pass a unicode string
> >> and a byte string it currently tries to convert bytes to
> >> characters
> >> but it makes more sense to convert the unicode string to bytes
> >> and return two byte strings concatenated.
> >
> > Sounds reasonable. OTOH, this would be the only (one of a very
> > few?) occasion where Python combines byte+unicode => byte.
> > Furthermore, it might be that the conversion of the Unicode
> > string to a file name fails as well.
> >
> > That said, I still think it is a good idea, so contributions
> > are welcome.
> >
> It would probably mess up those systems where filenames really are
> unicode strings and not byte sequences.
>
> Windows (when using NTFS) stores all the filenames in unicode, and
> Python uses the unicode api to implement listdir (when given a
> unicode path). This means that the filename never gets encoded to
> a byte string either by the OS or Python. If you use a byte string
> path than the filename gets encoded by Windows and Python just
> returns what it is given.

Sorry for being not clear, but I meant posixpath.join since the whole
discussion is about posix systems.

  Serge.



From mike at teczno.com  Sun Feb 20 16:03:59 2005
From: mike at teczno.com (Michal Migurski)
Date: Sun, 20 Feb 2005 13:03:59 -0800
Subject: Moving to Python from PHP - 3 questions
In-Reply-To: <cvat62$9h0$05$1@news.t-online.com>
References: <mailman.2873.1108931203.22381.python-list@python.org>
	<cvat62$9h0$05$1@news.t-online.com>
Message-ID: <f2582bbd378120970423d611a09d2789@teczno.com>

> The python-based zope application server has session management. 
> Togther
> with a built-in user and access rights management.
> ...
> This can be done in zope if you name a variable <name>:list. That then 
> will
> give you the variable as list regardless of the number of occurences.

Thank you. My impression of Zope in the past has been that it does what 
I need, along with 10,000 other things I don't (built in WebDAV 
server?!), but clearly I owe it another chance. I've been initially 
attracted to mod_python because of its raw simplicity and its apparent 
similarity to mod_php and mod_perl, which I am familiar with. I'll give 
Zope a try.

------------------------------------------------------
michal migurski- contact info, blog, and pgp key:
sf/ca            http://mike.teczno.com/contact.html



From bob at passcal.nmt.edu  Sun Feb 13 17:31:18 2005
From: bob at passcal.nmt.edu (Bob Greschke)
Date: Sun, 13 Feb 2005 15:31:18 -0700
Subject: Tkinter option_add for menu radiobutton
Message-ID: <hIOdnRP2Rei7SJLfRVn-1g@nmt.edu>

Root.option_add("*Menu.Font", "Veranda 9")

as an example, works fine in my program.

Root.option_add("*Radiobutton*selectColor", "black")

also works fine for regular radiobuttons.  What I can't
do is get the selectColor of the radiobutton's in the
menu to be black...the x.add_radiobutton() ones.

Root.option_add("*Menu.Radiobutton*selectColor", "black")...nope
Root.option_add("*Menu*selectColor", "black")...no change
Others...no luck yet.

What would the correct command be?  I can do a selectcolor = "black"
in the declaration of each button, but...

Thanks!

Bob




From nghoffma at gmail.com  Fri Feb  4 22:20:25 2005
From: nghoffma at gmail.com (nghoffma)
Date: 4 Feb 2005 19:20:25 -0800
Subject: returning True, False or None
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
Message-ID: <1107573625.439409.100870@o13g2000cwo.googlegroups.com>

Is it cheating to use a Set?

py>>def doit(thelist):
...     s = sets.Set(thelist)
...     if s == sets.Set([None]):
...             return None
...     else:
...             return max(s)
...
py>>print doit([ True , None , None , False ] )
True
py>>print doit([ None , False , False , None ] )
False
py>>print doit([ False , True , True , True ] )
True
py>>print doit( [None, None, None, None] )
None



From eric_brunel at despammed.com  Tue Feb 22 04:12:47 2005
From: eric_brunel at despammed.com (Eric Brunel)
Date: Tue, 22 Feb 2005 10:12:47 +0100
Subject: Mixing Txinter and Pygame
References: <mailman.2908.1109031345.22381.python-list@python.org>
Message-ID: <opsmlc7ld2rqur0o@eb.pragmadev>

On Tue, 22 Feb 2005 13:17:37 +1300, Tim Knauf <tim at upperorbit.com> wrote:
> Hi everyone, I'm glad to have found this list.
>
> I've written a small script for my own use which, amongst other things,
> captures mouse click information from a window containing an image. I
> used Pygame to manage the image window, as it was the easiest way to
> implement the functionality I needed. The surrounding interface windows
> (there are two) are constructed with Tkinter.
>
> Despite their unholy union, Pygame and Tkinter seem, generally, to
> cooperate. I'm using this main loop to update one, then the other:
>
> while 1:
>     gameLoop() # This function pumps the Pygame events and checks for
> mouse and keyboard events
>     pygame.time.wait(10)
>     mainwin.update() # mainwin is an instance of Application class,
> which is a child of Tkinter.frame
>
> I have my interface set up so that when *any* of the windows' close
> boxes are clicked, this function will be called:
>
> # This portion of the Pygame loop calls doquit() when it gets a 'QUIT'
> event...
> def gameLoop():
>     pygame.event.pump()
>     for event in pygame.event.get():
>         if event.type == QUIT:
>             doquit()
>             # Etc.
>
>     # And this portion of the Tkinter interface sets the
> WM_DELETE_WINDOW protocol to call doquit()
>     def createWidgets(self):
>         self.title("Region Management")
>         self.geometry('+830+8')
>         self.protocol("WM_DELETE_WINDOW", doquit)
>         # Etc.
>
> # A temporary file is removed, and both Pygame and Tkinter are
> instructed to quit
> def doquit():
>     if os.access('recalc.tmp', os.F_OK):
>         os.remove('recalc.tmp')
>     pygame.quit()
>     mainwin.master.destroy()
>
> Perhaps you've begun to see where I might be having problems. You see,
> if I close the script by closing the Pygame window, I get this exception:
>
> Traceback (most recent call last):
>   File "D:\Development\Python\sludge helpers\addScreenRegion
> helper.pyw", line 363, in ?
>     mainwin.update()
>   File "C:\Python24\lib\lib-tk\Tkinter.py", line 859, in update
>     self.tk.call('update')
> TclError: can't invoke "update" command:  application has been destroyed
>
> Conversely, if I close the application by closing a Tkinter window, I
> get this exception:
>
> Traceback (most recent call last):
>   File "D:\Development\Python\sludge helpers\addScreenRegion
> helper.pyw", line 361, in ?
>     gameLoop()
>   File "D:\Development\Python\sludge helpers\addScreenRegion
> helper.pyw", line 203, in gameLoop
>     pygame.event.pump()
> error: video system not initialized
>
> Obviously, Pygame doesn't like Tkinter telling it to quit (when it's
> trying to do something from its internal loop) and vice versa. Is there
> a simple way that I can avoid getting these exceptions on exit, or have
> I taken the wrong approach? Everything else appears to work fine. Please
> do excuse me if this seems a silly question, as I'm fairly new to Python
> and Pygame, and a total novice when it comes to Tkinter.

Well, since these are just exceptions, a simple try... except block would be fine, and you can even figure out the reason for the exception. Here is what I'd do:
- when you create your Tkinter main window, initialize an attribute that you'll use to see if the application has quit, e.g mainwin.hasQuit = False
- rewrite doquit this way:
def doquit():
     if os.access('recalc.tmp', os.F_OK):
         os.remove('recalc.tmp')
     mainwin.hasQuit = True
     pygame.quit()
- rewrite your custom event loop this way:
while 1:
     gameLoop()
     pygame.time.wait(10)
     try:
       mainwin.update()
     except TclError:
       if not mainwin.hasQuit:
         raise

And: (1) your problem should go away; (2) the "real" exceptions you may get from Tkinter windows should not passed unnoticed.

> On a side note, has anyone else found the Tkinter documentation awfully
> obscure? I've found Python a joy to learn about, and Pygame's tutorials
> are a lot of fun. I can't say the same for Tkinter, and found myself
> having to do many Google searches before I uncovered information I could
> put to use. Has anyone found any high-quality (online) documentation
> that proves me wrong? :^)

Incomplete, but very useful: http://www.pythonware.com/library/tkinter/introduction/index.htm
But the best reference documentation you'll ever find is the tcl/tk man pages, on-line here: http://www.tcl.tk/man/tcl8.4/TkCmd/contents.htm
It unfortunately requires to know how to convert the tcl/tk syntax to Python/Tkinter syntax, but it is actually quite easy (mainly read "option=value" when the tcl/tk documentation says "-option value")

HTH
  - Eric Brunel -


From __peter__ at web.de  Mon Feb 21 03:14:05 2005
From: __peter__ at web.de (Peter Otten)
Date: Mon, 21 Feb 2005 09:14:05 +0100
Subject: python2.4 generator expression > python2.3 list expression
References: <mailman.2882.1108961815.22381.python-list@python.org>
Message-ID: <cvc57v$7iv$01$1@news.t-online.com>

snacktime wrote:

> I need to convert a generator expression to a list expression so it
> will work under python 2.3.
> 
> I rewrote this:
> 
> for c in range(128):
>   even_odd = (sum(bool(c & 1<<b) for b in range(8))) & 1
> 
> As this:
> 
> for c in range(128):
>   bo = [bool(c & 1<<b) for b in range(8)]
>   even_odd = sum(bo) & 1
> 
> 
> Seems to work, is there a better way to do this?

Summing over zeros seems pointless, so

>>> for c in range(128):
...     print len([1 for b in range(8) if c & 1 << b]) & 1,
...
0 1 1 0 1 0 0 1 1 0 0 1 0 1 1 0 1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1 1 0 0 1 0 1
1 0 0 1 1 0 1 0 0 1 0 1 1 0 1 0 0 1 1 0 0 1 0 1 1 0 1 0 0 1 0 1 1 0 0 1 1 0
1 0 0 1 0 1 1 0 1 0 0 1 1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1 1 0 0 1 0 1 1 0 1 0
0 1 0 1 1 0 0 1 1 0 1 0 0 1

The same simplification works for genexps, but you have to use sum() there
instead of len(). Another optimization would be to precalculate the
bitmasks [1 << b for b in range(8)] outside the loop.

Peter



From michael at stroeder.com  Sat Feb 12 02:53:53 2005
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Sat, 12 Feb 2005 08:53:53 +0100
Subject: kerberos extension module
In-Reply-To: <mailman.2404.1108144165.22381.python-list@python.org>
References: <mailman.2404.1108144165.22381.python-list@python.org>
Message-ID: <h9p0e2-r13.ln1@nb2.stroeder.com>

John Reuning wrote:
> I'm interested in updating the very old kerberos extension module.
> [..]
> http://www.python.org/ftp/python/contrib-09-
> Dec-1999/System/krb5module-0.1.tar.gz
> http://www.python.org/ftp/python/contrib-09-
> Dec-1999/System/krb5module.README

Will it build against heimdal or is this module only available
for MIT Kerberos?

Ciao, Michael.


From tim.golden at viacom-outdoor.co.uk  Tue Feb  1 06:52:35 2005
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 1 Feb 2005 11:52:35 -0000 
Subject: Python's idiom for function overloads
Message-ID: <9A28C052FF32734DACB0A288A3533991035A25@vogbs009.gb.vo.local>

[Jacek Generowicz]
| 
| To each his own, and vice versa.

Vice versa? :)

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
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From vze4rx4y at verizon.net  Sat Feb 26 06:51:13 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Sat, 26 Feb 2005 11:51:13 GMT
Subject: Which module is "set " in?
References: <xN-dnQs_WL5Tnb3fRVn-3g@comcast.com>
	<mailman.3081.1109394085.22381.python-list@python.org>
	<1109401096.625038.51050@l41g2000cwc.googlegroups.com>
Message-ID: <RoZTd.43867$t46.23478@trndny04>

[Michael Hartl]
> It's good that you're using Python 2.3, which does have sets available,
> as a previous poster mentioned.  Users of Python 2.2 or earlier can get
> most of the Set functionality using the following class (from Peter
> Norvig's utils.py file):

Py2.3's set module also works under Py2.2.  Get a copy from viewcvs:

  http://tinyurl.com/6lqr3

or


http://cvs.sourceforge.net/viewcvs.py/*checkout*/python/python/dist/src/Lib/sets.py?content-type=text%2Fplain&rev=1.43.4.2

Of course, if upgrading to Py2.4 is an option, that is the way to go.  If you're
living in a pre 2.2 world without iterators and generators, you're really
missing out.


Raymond Hettinger








From peter at somewhere.com  Tue Feb  8 03:54:22 2005
From: peter at somewhere.com (Peter Maas)
Date: Tue, 08 Feb 2005 09:54:22 +0100
Subject: An Ode To My Two Loves
In-Reply-To: <slrnd0cn2e.rr5.jgrahn-nntq@frailea.sa.invalid>
References: <mailman.1982.1107624858.22381.python-list@python.org>
	<slrnd0cn2e.rr5.jgrahn-nntq@frailea.sa.invalid>
Message-ID: <cu9usa$180$1@swifty.westend.com>

Jorgen Grahn schrieb:
> It's something that worries me frequently -- I feel guilty when I introduce
> Python into ("force Python upon") an organization. Because I hate having
> /other/ people's favorite toy languages forced down /my/ throat ...

The solution is a multi language glue layer. Software interfaces are
defined in a  language independent way so that they can be used by
many  languages.I wonder why COM is so dominant on Windows and most
Unixish systems don't use CORBA (with GNOME as an exception).
Microsoft's .net takes this one step further by defining a multi
language implementation layer.

I hope these ideas will become more influential in Unix like systems
as well just to stop this resource wasting source code issue.

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From danperl at rogers.com  Sun Feb  6 12:19:21 2005
From: danperl at rogers.com (Dan Perl)
Date: Sun, 6 Feb 2005 12:19:21 -0500
Subject: CGI POST problem was: How to read POSTed data
References: <mailman.1980.1107622913.22381.python-list@python.org>
	<dMydnSAsTcgE2JjfRVn-oQ@rogers.com>
	<1107659974.048175.221770@z14g2000cwz.googlegroups.com>
Message-ID: <N9edndiJCtIBzJvfRVn-jg@rogers.com>


<and-google at doxdesk.com> wrote in message 
news:1107659974.048175.221770 at z14g2000cwz.googlegroups.com...
> Dan Perl wrote:
>
>> how is a multipart POST request parsed by CGIHTTPServer?
> [...]
> CGIHTTPServer, on the other hand, I have never really trusted. I would
> suspect that fella.

It turns out I was wrong thinking that the POST requests I was handling were 
multipart.  Blame that on my limited knowledge of HTTP.  At least the 
content-type header in the request doesn't say that they are multipart.  I 
checked with the an Ethereal sniffer and my Firefox browser on Windows sends 
a request with 'content-type: application/x-www-form-urlencoded' and the 
form data in the body of the request, after the headers.  I'll assume for 
now that this is a valid HTTP POST request as I believe that Firefox is 
responsible for it alone and that it is not determined by my HTML form.

Pierre Quentel's suggestion for an implementation of do_POST in the "How to 
read POSTed data" seems to handle requests of this kind, although I didn't 
personally try it.  But the run_cgi method in CGIHTTPServer expects the form 
data to be only in the POST header line, in the path of the URL, like in a 
GET request.  I cannot find form data being parsed any other way if the 
content-type is x-www-form-urlencoded.  Am I missing something?  Also, I 
don't know if this means anything, but shouldn't CGIHTTPServer use the cgi 
module if cgi has all those useful parsing utilities?

Dan 




From P.Rozycki at elka.pw.edu.pl  Sun Feb 27 13:47:19 2005
From: P.Rozycki at elka.pw.edu.pl (=?ISO-8859-2?Q?Przemys=B3aw_R=F3=BFycki?=)
Date: Sun, 27 Feb 2005 19:47:19 +0100
Subject: Pyallegro status (is it dead?). What about pygame.
Message-ID: <cvt44c$s4f$1@julia.coi.pw.edu.pl>

Hi.

Has anyone used pyallegro? - I want to give allegro library a chance - 
but it seems that python bindings for this library are not maintained 
anymore.
How does pygame compare to pyallegro - both in maturity and convenience 
of usage in python?


From xeoicq at netscape.net  Mon Feb 14 06:53:23 2005
From: xeoicq at netscape.net (xeoicq at netscape.net)
Date: 14 Feb 2005 03:53:23 -0800
Subject: keeping a COM server alive
Message-ID: <1108382003.358573.132710@c13g2000cwb.googlegroups.com>

I have implemented a local COM Server with win32com framework where all
clients
use the same global object (test_obj). So far it works, but when the
last client
is closed the gobal object is deleted because the pythonw.exe is
closed. When I
create a new client a new pythonw process is started. I need that the
new client
gets the same global object. How can I prevent the Python COM
enviornment
(pythonw.exe) to close when no client exist. I figured out a
workaround, but
there must be real solution to the problem.



The code looks like:

class test:
    ...

test_obj=test()


class test_F:

    _reg_clsid_ = ...
    _reg_progid_ = "test.cl"
    _reg_clsctx_ = pythoncom.CLSCTX_LOCAL_SERVER
    _public_methods_ = ...


    def __init__(self):
        self.delegate=test_obj
        ....
    ...


####Workaround to keep the local server alive
if not __name__=='__main__':
    import win32com.client
    dummy=win32com.client.Dispatch("test.cl")
##########################################################


if __name__=='__main__':
    import win32com.server.register
    win32com.server.register.UseCommandLine(test_F, debug=0)



From ajikoe at gmail.com  Wed Feb  9 10:08:18 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 9 Feb 2005 07:08:18 -0800
Subject: multi threading in multi processor (computer)
Message-ID: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>

Hello,

Is anyone has experiance in running python code to run multi thread
parallel in multi processor. Is it possible ?

Can python manage which cpu shoud do every thread?

Sincerely Yours,
Pujo



From pierre.barbier at cirad.fr  Thu Feb  3 03:59:14 2005
From: pierre.barbier at cirad.fr (Pierre Barbier de Reuille)
Date: Thu, 03 Feb 2005 09:59:14 +0100
Subject: IDLE history, Python IDE, and Interactive Python with Vim
In-Reply-To: <1107419485.368275.45240@l41g2000cwc.googlegroups.com>
References: <opsllommgvb1cml1@ashot>
	<1107419485.368275.45240@l41g2000cwc.googlegroups.com>
Message-ID: <4201e761$0$606$636a15ce@news.free.fr>

Fuzzyman a ?crit :
> If you use IPython for your interactive mode stuff, you'll have a nice
> history...
> Regards,
> 
> Fuzzy
> http://www.voidspace.org.uk/python/index.shtml
> 

Best event : if your "EDITOR" system variable in "vim", using the "ed" 
command in ipython will bring "vim" with (eventually) the code you want 
to edit :)

Now, I wonder if you could embed ipython inside vim ...

Pierre


From miki.tebeka at zoran.com  Sun Feb  6 02:23:17 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Sun, 6 Feb 2005 09:23:17 +0200
Subject: Trouble converting hex to decimal?
In-Reply-To: <1107611491.18588.26.camel@dulcevida>
References: <1107611491.18588.26.camel@dulcevida>
Message-ID: <20050206072316.GD2552@zoran.com>

Hello Earl,

> I'm trying to process the IP packet length field, as recorded by pcap
> (Ethereal) and recovered using pcapy.  When I slice out those bytes, I
> get a value that shows in '\x00' format, rather than '0x00'.  Neither
> int() nor eval() are working.  How do I handle this?
Try using "array" or "struct" modules.

HTH.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys


From franz.steinhaeusler at utanet.at  Fri Feb 25 05:06:58 2005
From: franz.steinhaeusler at utanet.at (Franz Steinhaeusler)
Date: Fri, 25 Feb 2005 11:06:58 +0100
Subject: wanted: C++ parser written in Python
References: <mukr11t39khpd8od53im9jic3s6qjcl3j2@4ax.com>
	<3881hvF5jg6qrU1@individual.net>
Message-ID: <91ut11pi7s6acj2pthj2crnh6n96o6raqs@4ax.com>

On Fri, 25 Feb 2005 15:10:06 +0800, "mep" <mep_ at 163.com> wrote:

>Try ANTLR with python code generation:
>http://www.antlr.org/
>
>And C++ grammers:
>http://www.antlr.org/grammar/cpp
>
>You can generate a c++ parser in python with the above.

Thank you, but it is too big.

Anyway:
I'm looking for some (simple) "rules" to parse (regex) 
and try to implement myself, if nothing is available.

It don't have to be perfect.

Maybe I look for some code in for example 
Dev-Cpp from Bloodshed (there is also a c++ class browser).
-- 
Franz Steinhaeusler


From fuzzyman at gmail.com  Mon Feb 21 07:09:05 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 21 Feb 2005 04:09:05 -0800
Subject: functions and named keyword arguments
Message-ID: <1108987745.605901.75090@l41g2000cwc.googlegroups.com>

Sorry if this is a duplicate - I use the google interface and sometiems
it screws up (not showing stuff you've posted *or* not posting it).
Before you ask it's because at work I have no NNTP and *heavily*
restricted http.

A colleague and I have built a Validator object for use with ConfigObj
and other general schema situations. A config file is used to store a
schema that specifies how to test a value that it is valid.

keyword=function(param1, param2)

e.g. you could specify :
size = range(30, 50)

This means that the keyword 'size' must be an integer between 30 and
50. There is a matching function stored in a dictionary that is called
and the relavant arguments passed to it.

The function name and parameters are parsed from the config file that
defines the schema.

args, fname = parsefunction('range(30,50)')
test = funcdict[fname](*args)

What I can't easily see is any way of passing named keyword arguments
to the function. Suppose we wanted to pass keyword=param to a function
- is there any way of doing this ... obviously passing in
'keyword=param' as text has entirely the wrong result......

Anyone got any clues ? I suspect compiling the function into a code
object will help.... but this is a slightly black art for me.

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From programmer.py at gmail.com  Thu Feb 24 21:31:55 2005
From: programmer.py at gmail.com (Jaime Wyant)
Date: Thu, 24 Feb 2005 20:31:55 -0600
Subject: Best IDe
In-Reply-To: <1109295091.836841.78690@z14g2000cwz.googlegroups.com>
References: <0bvTd.52404$wc.42219@trnddc07>
	<1109295091.836841.78690@z14g2000cwz.googlegroups.com>
Message-ID: <d52c72d20502241831619cfd42@mail.gmail.com>

I demo'd wing ide and have to say it's the best commercial offering. 
The only other one I'm aware of is Komodo and it really can't touch
Wing.

But for me, wingide was slugish.  I have a 1/2 gig of memory and a
pretty hefty CPU - i think its a 1.6 Pentium M [it's a company issued
laptop -- so im not sure of the specs].  I found that as  wing tried
to autocomplete identifiers in large name spaces that it would take a
second or so.  This was really painful when working with wxPython.

What wing does have going for it is a REALLY good auto-completion
system.  Yeah it's slow, but its good.  You wing hints as to what
objects are by using isinstance().  For example, the code below tells
wing that frame is a wx.Frame ->

# make_frame returns a wx.Frame
frame = make_frame()

isinstance(frame, wx.Frame)

Once wing has a hint, it'll autocomplete the methods / properties for
you.  But again, it is slow.

As far as free software goes, I really like stani's python editor.  It
seems to *watch* methods that you call on an object and autocomplete
based on that.  For example suppose it sees this code:

# make another wx.Frame
frame = make_frame()
frame.method1()
frame.method2()

...

# Below, stani will autocomplete showing you method1 and method 2.
# No they aren't valid wx.Frame methods!
frame.

HTH,
jw

On 24 Feb 2005 17:31:31 -0800, Harlin Seritt <harlinseritt at yahoo.com> wrote:
> IDLE, PytonWin and SPE are all free and offer all of the important
> features you'll see even in commercial IDE's.
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From jeffrey.borkent at adelaide.edu.au  Mon Feb  7 17:59:34 2005
From: jeffrey.borkent at adelaide.edu.au (Jeffrey Borkent)
Date: Tue, 08 Feb 2005 09:29:34 +1030
Subject: def __init__ question in a class definition rephrased
Message-ID: <1107817173.3795.51.camel@batfink.its.adelaide.edu.au>

Hi There,

Please let me rephrase the problem as many people misunderstood
what i was trying to ask.

I know that the __init__ is the class constructor, that was not my
question.

under the def __init__ are several assignments

self.__list = list
self.refresh = 360

i wish to add some more assignments of this type to this function.

what is the significance ( if any ) of the __ in these self.xxxxxx
assignments.


If i look at chapter 9.5 in the tutorial (v2.3.4) then it talks
about private variables.... is this the same thing


Cheers






-- 
Jeffrey Borkent
Systems Specialist
Information Technology Services
University of Adelaide
Level 7, 10 Pultney Street
Adelaide. 5005
Ph: 8303 3000
jeffrey.borkent at adelaide.edu.au


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From newsgroups at jhrothjr.com  Sat Feb 12 07:47:21 2005
From: newsgroups at jhrothjr.com (John Roth)
Date: Sat, 12 Feb 2005 06:47:21 -0600
Subject: Unittesting for web applications
References: <mailman.2443.1108204994.22381.python-list@python.org>
Message-ID: <110ruo9bcbus08@news.supernews.com>

I believe there are xUnit clones named
Httpunit and Htmlunit, as well as a number
of variants. See the huge list of xUnit
clones on:

http://www.xprogramming.com/

in the downloads section. I don't think
any of them are Python based, though.

You might also want to look at some of
the Htmlunit integration into FIT and
Fitnesse.

You can frequently get discussions on
the Yahoo TDD list.

John Roth


"Sandip Bhattacharya" <sandip at lug-delhi.org> wrote in message 
news:mailman.2443.1108204994.22381.python-list at python.org...
> Can someone suggest me some good resources for learning how to use
> unittests for web applications? Do we always have to cook up our own
> webpage scrapers to test the code?
>
> - Sandip
>
> -- 
> Sandip Bhattacharya    *    Puroga Technologies   *     sandip at puroga.com
> Work: http://www.puroga.com   *    Home/Blog: http://www.sandipb.net/blog
>
> PGP/GPG Signature: 51A4 6C57 4BC6 8C82 6A65 AE78 B1A1 2280 A129 0FF3
>
>
> 



From fperez.net at gmail.com  Fri Feb  4 17:59:13 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Fri, 04 Feb 2005 15:59:13 -0700
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot><1107487113.732375.110850@c13g2000cwb.googlegroups.com><opslnmywarej1m1c@ashot><mailman.1865.1107491434.22381.python-list@python.org><opsln54fpwej1m1c@ashot>
	<36hculF51ho2sU1@individual.net><1107530489.308497.103530@g14g2000cwa.googlegroups.com><36hrjpF4ui8fbU1@individual.net>
	<mailman.1911.1107546744.22381.python-list@python.org>
	<36i84qF52ce29U1@individual.net> <opslo127s7ej1m1c@ashot>
Message-ID: <cu0umf$cja$1@sea.gmane.org>

Ashot wrote:

> this is what it looks like:
> 
> http://www.freshraisins.com/sand/ipythonscreen.PNG
> 
> does cygwin have a readline utility in it?  Perhaps this is overriding the
> correct one?  Thats the only thing I can think of.

Hi folks,

could you please test under windows the 1.9 version of readline?

http://sourceforge.net/project/showfiles.php?group_id=82407&package_id=84552&release_id=302513

This was just put up a moment ago by the developer, let me know if it fixes
these problems.

Cheers,

f



From beliavsky at aol.com  Thu Feb  3 10:10:53 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 3 Feb 2005 07:10:53 -0800
Subject: Is there a market for python developers?
References: <1107440354.317628.221090@g14g2000cwa.googlegroups.com>
Message-ID: <1107443452.965779.129760@l41g2000cwc.googlegroups.com>

Mabon Dane wrote:
> I am new to python and took my first attempts at working with this
> language today.  Is there a market for people who work with Python?

You can Google this newsgroup for "beliavsky at aol.com jobs" to find two
messages I posted with statistics.



From jerf at jerf.org  Thu Feb 17 10:03:14 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 17 Feb 2005 10:03:14 -0500
Subject: namespace collisions
References: <4214e074$0$32617$db0fefd9@news.zen.co.uk>
Message-ID: <pan.2005.02.17.15.03.13.630011@jerf.org>

On Thu, 17 Feb 2005 18:20:36 +0000, Will McGugan wrote:
> I'm accumulating a number of small functions, which I have sensibly put 
> in a single file called 'util.py'. But it occurs to me that with such a 
> generic name it could cause problems with other modules not written by 
> myself. Whats the best way of handling this? If I put it in a common 
> location in my Python path, should I call it willsutil.py?

Yes, something like that would be best. Two modules with the same name can
cause problems because once one is imported, the other will never be;
'import' just returns the first out of the cache.

Looking on my system, I see 6 "utils.py" files; one in the xmlproc parser,
two in twisted, one in docutils, one in a program called "sgmltools", and
one in the xblproc parser in Jython, which I didn't even know I had
installed(!). While I don't think you should have a problem because those
are submodules (that is, you can't 'import utils', you have to 'import
docutils.utils' and that doesn't create a 'utils' module), I'd say that
in general, that's a scary enough name that you are likely to encounter
trouble later.



From greenmonkey at foo.com  Mon Feb 28 09:17:03 2005
From: greenmonkey at foo.com (Ryan White)
Date: Mon, 28 Feb 2005 16:17:03 +0200
Subject: Newbie question
Message-ID: <cvv8k2$19ov$1@newsreader02.ops.uunet.co.za>

Hi all

I'm wanting to use python to display some jpeg images, maybe present them at
a percentage of their actual size etc.

How do I display an image in Python? - I've run over Tkinter, but obviously
in all the wrong places.

Any help or sample code would be much appreciated.

Ryan




From pierre.barbier at cirad.fr  Wed Feb  2 07:35:51 2005
From: pierre.barbier at cirad.fr (Pierre Barbier de Reuille)
Date: Wed, 02 Feb 2005 13:35:51 +0100
Subject: Is this a contradiction in the docs ?
In-Reply-To: <1107342032.273119.194120@o13g2000cwo.googlegroups.com>
References: <1107342032.273119.194120@o13g2000cwo.googlegroups.com>
Message-ID: <4200c8a6$0$518$626a14ce@news.free.fr>

Fuzzyman a ?crit :
> The following two passages from the python documentation *appear* to
> contradict each other. Equally possible (or more likely !) is that I
> misunderstand it :
> 
> eval :
> This function can also be used to execute arbitrary code objects (such
> as those created by compile()). In this case pass a code object instead
> of a string. The code object must have been compiled passing 'eval' as
> the kind argument.
> 
> 
> compile:
> The kind argument specifies what kind of code must be compiled; it can
> be 'exec' if string consists of a sequence of statements, 'eval' if it
> consists of a single expression, or 'single' if it consists of a single
> interactive statement (in the latter case, expression statements that
> evaluate to something else than None will be printed).
> 
> The docs for compile say that if you are creating a code object from a
> sequence of statements you must use the kind argument 'exec'. Eval says
> that if you are using the eval function you must use 'eval' as your
> kind argument.
> 
> In practise I have found that using the eval function with code objects
> compiled with 'exec' as the kind argument works fine. Is this a 'bug'
> in the docs ?
> Regards,
> 
> Fuzzy
> http://www.voidspace.org.uk/python/index.shtml
> 

IMO, it's just logical the code sent to "eval" was compiled with "eval" 
as the kind argument. But don't forget the documentation is kind of 
"abstract" and that CPython is _just_ an implementation (ok, it's the 
reference implementation) of python. You'd better follow the doc if you 
want your code to work on other Python implementation (ie. JPython, ...).

Pierre


From kraus at hagen-partner.de  Wed Feb 23 03:00:40 2005
From: kraus at hagen-partner.de (Wolfram Kraus)
Date: Wed, 23 Feb 2005 09:00:40 +0100
Subject: display VARCHAR(mysql) and special chars in html
In-Reply-To: <mailman.2900.1109014601.22381.python-list@python.org>
References: <mailman.2900.1109014601.22381.python-list@python.org>
Message-ID: <cvhd74$6be$1@ork-un.noris.net>

Jonas Meurer wrote:
> hello,
> 
> my script selects a comment saved as VARCHAR in MySQL and displays it
> inside an html page.
> 
> the problem is, that the comment contains several special characters, as
> mysterious utf-8 hyphens, german umlauts, etc.
> 
> i could write a function to parse the comment and substitute special
> chars with the relevant html code, but maybe this already exists in some
> module?
> 
> if not, it'll be hard work, as i've to consider many special chars, and
> at least iso-8859-1* and utf-8 as charmaps.
> 
> bye
>  jonas
If I understand you correctly, just put

<meta http-equiv="CONTENT-TYPE" content="text/html; charset=utf-8">

somewhere in the <head>-section of you HTML-Page.

HTH,
Wolfram


From friedmud at gmail.com  Mon Feb 14 18:43:13 2005
From: friedmud at gmail.com (friedmud at gmail.com)
Date: 14 Feb 2005 15:43:13 -0800
Subject: Inheritance error in python 2.3.4???
In-Reply-To: <mailman.2587.1108423573.22381.python-list@python.org>
References: <1108422852.332215.165790@o13g2000cwo.googlegroups.com>
	<mailman.2587.1108423573.22381.python-list@python.org>
Message-ID: <1108424593.009391.187930@z14g2000cwz.googlegroups.com>

The problem is that I actually do need them to be private to the
outside world... but not to subclasses.  I guess what I actually need
is something like "protected" in C++.... but I don't think I'm going to
get that luxury.

I think what's happening in my example is that the name mangling is
looking at the defining class instead of looking at "self"... which is
not what I expected.  Which means it is accessing two different
variables (_subclass_something on the set and _baseclass__something on
the get)

Anyone know of a workaround for that?? (other than renaming the
variable so it doesn't have the two underscores?)

I guess I could just use one underscore.... but that means it is easier
for other people to get at my implementation details (which, coming
from a C++ background really bothers me).

Friedmud



From irmen.NOSPAM at xs4all.nl  Tue Feb 15 15:37:01 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Tue, 15 Feb 2005 21:37:01 +0100
Subject: Calling a function from module question.
In-Reply-To: <UTsQd.32669$6u.27954@fed1read02>
References: <UTsQd.32669$6u.27954@fed1read02>
Message-ID: <42125d6d$0$28977$e4fe514c@news.xs4all.nl>

Sean wrote:

> Then I would have a script that uses the
> print_this function defined in the module
> without using the module name in the call.



from module_name import print_this

or, even:

from module_name import print_this as other_nice_name

--Irmen


From ajikoe at gmail.com  Tue Feb  8 03:17:35 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 8 Feb 2005 00:17:35 -0800
Subject: python connect to server using SSH protocol
Message-ID: <1107850655.289129.94880@o13g2000cwo.googlegroups.com>

How can python connect to server which use SSH protocol?
Is it easy since my python has to run third party vendor, write data,
read data inside the server (supercomputer).

Any suggestion?

Sincerely Yours,
Pujo Aji



From jdadson at yahoo.com  Tue Feb  8 20:51:23 2005
From: jdadson at yahoo.com (Jive Dadson)
Date: Wed, 09 Feb 2005 01:51:23 GMT
Subject: What's wrong with `is not None`?
References: <mailman.2219.1107903975.22381.python-list@python.org>
Message-ID: <42096CD0.D6EA3300@yahoo.com>



Frans Englich wrote:
> 
> That's what PyChecker tells me, at least.
> 
> A line of:
> 
> if testReport is not None:
> 
> results in:
> 
> runner.py:587: Using is not None, may not always work
> 
> In what circumstances can `is not None` fail? How and why does it fail?
> 
> What is the equivalent expression which is more secure; `!= None`?

Yeah, that'll do it.

Incredibly, Microsoft has patented the "isnot" operator.  I kid you not.
They are amassing an incredible number of patents, many with no more
merit than the "isnot" one.  I'll leave it to your imagination as to
why.


From plb at iotk.com  Tue Feb  8 08:01:53 2005
From: plb at iotk.com (plb)
Date: 8 Feb 2005 05:01:53 -0800
Subject: Handling import conflicts when module has the same name as a
	library module that it needs to import?
Message-ID: <1107866016.064921.22300@o13g2000cwo.googlegroups.com>

All:

I am struggling with an import problem...

In my package, myapp, there is a module called logging. This module,
naturally, imports the standard library module logging.  However, when
I try 'import myapp.logging', the 'import logging' statement appears to
be finding the myapp.logging module instead of the one in the standard
library.

How can I ensure that my logging module doesn't try to import itself?

--PLB



From sean_mcilroy at yahoo.com  Tue Feb  1 19:15:51 2005
From: sean_mcilroy at yahoo.com (Sean McIlroy)
Date: 1 Feb 2005 16:15:51 -0800
Subject: Save the Canvas!
Message-ID: <e5063e96.0502011615.2d182c77@posting.google.com>

I'd like to be able to save a Tkinter Canvas in a format other than
postscript (preferably gif). Is there a tool out there for
accomplishing that? Any help will be much appreciated.

Peace,
STM


From phil_nospam_schmidt at yahoo.com  Tue Feb  1 16:46:24 2005
From: phil_nospam_schmidt at yahoo.com (phil_nospam_schmidt at yahoo.com)
Date: 1 Feb 2005 13:46:24 -0800
Subject: Suggesion for an undergrad final year project in Python
References: <1107241918.722156.123590@c13g2000cwb.googlegroups.com>
Message-ID: <1107294384.830957.148140@c13g2000cwb.googlegroups.com>

How about a tool that can compute the intersection/union/disjunction of
boolean expressions, and return the result as a boolean expression?
This is something I've had on my plate for awhile, but haven't been
able to get around to doing.

As a simple example, assume we have the following expressions:

e1 = (y)
e2 = ((not x) and (not y)) or ((not x) and (y) and (z))

The union of these two would be ((not x) or (y)). The simplest
representation of the result would be best.


To make it harder consider the following additional requirements:

1) Instead of just boolean variables, allow variables with more than
two discrete values (i.e., True and False). For example, if a variable
x can represent the values 1, 2, and 3, then an expression could test
for x!=3, or x>1, or even x in [1,3].

2) Use Python's native data structures to represent expressions. Using
the example above, we might have something like this:

e1 = [{'y':True}]
e2 = [{'x':False, 'y':False}, {'x':False, 'y':True, 'z':True}]

How you might extend this to non-boolean expressions would be up to
you.

3) Make it fast, and scalable to many variables (up to at least 50). I
haven't studied this extensively, but I believe a Quine-McKlusky method
is order n^2 with n being the number of variables, so this will quickly
blow up as the number of variables increases.

4) As my example in (2) suggested, make variable names strings. This
allows arbitrary names. For non-boolean discrete variables, allow any
arbitrary list of numbers or strings as elements.

5) Since a side-effect of the program will (probably) be the ability to
reduce expressions to their simplest representation, make this
capability a part of the public API, since that's a useful function in
itself.



From steven.bethard at gmail.com  Fri Feb 18 12:17:54 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 18 Feb 2005 10:17:54 -0700
Subject: difference between class methods and instance methods
In-Reply-To: <Xns9601963496890duncanrcpcouk@127.0.0.1>
References: <pan.2005.02.17.07.04.37.907754@yahooz.com>
	<Xns96005FE3164DAduncanrcpcouk@127.0.0.1>
	<1119g2rre5g610c@corp.supernews.com>
	<37juh3F5d511mU1@individual.net>
	<Xns9600AE4FC946duncanrcpcouk@127.0.0.1>
	<37m8n9F5dkf4kU1@individual.net>
	<Xns9601963496890duncanrcpcouk@127.0.0.1>
Message-ID: <JqWdnY5jiNeivovfRVn-jA@comcast.com>

Duncan Booth wrote:
> Diez B. Roggisch wrote:
>> Duncan Booth wrote:
>>> Bound methods get created whenever you reference a method of an
>>> instance.
>>
>> That did escape me so far - interesting. Why is it that way? I'd
>> expect that creating a bound method from the class and then storing it
>> in the objects dictionary is what happens. 
> 
> If you had a class with 50,000 methods it could take quite a while to 
> create instances, consider Zope as an example where every object acquires 
> large numbers of methods most of which are completely irrelevant. Even 
> outside Zope most objects never have all their methods called: dict, for 
> example, has 38 methods but most of them get little or no use.

So why couldn't bound methods be created like lazy properties:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/363602

So that they're not created at instance creation time, but they're only 
created once, when first accessed?

Not that I've ever had any problems with the speed or memory usage of 
bound methods -- I'm just curious about the design decision.

STeVe


From nytimes at swiftdsl.com.au  Mon Feb  7 17:14:27 2005
From: nytimes at swiftdsl.com.au (huy)
Date: Tue, 08 Feb 2005 09:14:27 +1100
Subject: Big development in the GUI realm
In-Reply-To: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
Message-ID: <4207E843.7070403@swiftdsl.com.au>

RM wrote:
> For all you GUI developers, things just got a little more interesting.
> Trolltech will soon be offering the QT GUI toolkit for Windows under
> the GPL license.  That means that PyQt may become a much more popular
> option in the near future.  Unfortunately, some things available for
> the commercial customers of Trolltech are not available to the GPL
> users.  For example, from their FAQ, it seems that no precompiled
> binaries will be provided.  Support for comercial compilers will not be
> built in, only for gcc (through Cygwin?). 

Isn't this just the same thing with a different spin. There was always 
an available distribution for linux for non-commercial use. Windows was 
always the problem. You still can't use it for windows without knowing 
how to compile the thing on windows.

huy


From stefan.behnel-n05pAM at web.de  Fri Feb 11 14:10:54 2005
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Fri, 11 Feb 2005 20:10:54 +0100
Subject: frozenset() without arguments should return a singleton
Message-ID: <cuivvp$ep2$1@lnx107.hrz.tu-darmstadt.de>

Hi!

frozenset() doesn't behave as the other immutable empty data types in 2.4:

.>>> '' is ''
True
.>>> () is ()
True
.>>> frozenset() is frozenset()
False

.>>> id(()),id(())
(1077579820, 1077579820)
.>>> id(())
1077579820
.>>> id(frozenset()),id(frozenset())
(1077581296, 1077581296)
.>>> id(frozenset())
1077581440
.>>> id(frozenset(()))
1077582256

frozenset() called without arguments (or on empty sequences) should always
return a singleton object. It is immutable, so I can see no reason why it
should take up more resources than necessary.

Stefan


From joakim.storck at home.se  Wed Feb  2 14:46:33 2005
From: joakim.storck at home.se (Joakim Storck)
Date: 2 Feb 2005 11:46:33 -0800
Subject: Hash of class from instance
In-Reply-To: <UqidnSE1QIXrtJzfRVn-ug@comcast.com>
References: <1107363342.531396.238350@g14g2000cwa.googlegroups.com>
	<Xns95F1AE4AFCC36duncanrcpcouk@127.0.0.1>
	<1107364617.371795.13740@l41g2000cwc.googlegroups.com>
	<36cj80F4ue5biU1@individual.net>
	<UqidnSE1QIXrtJzfRVn-ug@comcast.com>
Message-ID: <1107373593.789905.168850@o13g2000cwo.googlegroups.com>

So I guess it might be a little bit less unwise to use id() instead
then...

/Joakim



From steven.bethard at gmail.com  Fri Feb 11 14:48:36 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 11 Feb 2005 12:48:36 -0700
Subject: check if object is number
In-Reply-To: <1108150251.289441.170680@c13g2000cwb.googlegroups.com>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
	<1108150251.289441.170680@c13g2000cwb.googlegroups.com>
Message-ID: <Avydnb0b37qNkZDfRVn-rg@comcast.com>

Dan Bishop wrote:
> Steven Bethard wrote:
> 
>>Is there a good way to determine if an object is a numeric type?
> 
> How about this?
> 
> ... def is_number(x):
> ...    try:
> ...       x + 1
> ...       return True
> ...    except TypeError:
> ...       return False

Great, thanks!  That's the kind of thing I was looking for!

Steve


From peter at engcorp.com  Thu Feb 24 21:17:27 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 24 Feb 2005 21:17:27 -0500
Subject: A few q's on python files.
In-Reply-To: <inbo11llkop2ag6oea38771qoj43jbivg5@4ax.com>
References: <mailman.2907.1109030036.22381.python-list@python.org>
	<inbo11llkop2ag6oea38771qoj43jbivg5@4ax.com>
Message-ID: <jaCdnVctMt4qF4PfRVn-oQ@powergate.ca>

Tim Roberts wrote:
> There are packages (like py2exe) that can convert your script into an
> executable, but they are essentially installers.  They package your script,
> and all the scripts and libraries it needs, into a single file along with
> the interpreter.  When the .exe is executed, it extracts the interpreter
> and the scripts into a temp directory, and fires up the interpreter.

Correction: py2exe doesn't really do that at all.  At least,
not any of the "single file" or "extracting" stuff.

Py2exe packages all the Python bytecode into a single zip
file (library.zip) and also includes all .pyd and .dll
files required to run the program, along with a stub
.exe file which instantiates an interpreter (from pythonXX.dll)
and runs the main script.

Installers such as InnoSetup are what you use to do the
"single file" stuff, and when you run them they do the
usual Windows installer stuff like extracting files to the
installation directory, creating icons, etc.

Finally there are tools (names don't come to mind since I don't
use them, but they're easy to find) which *can* do that
"extract to temporary directory" thing rather than the InnoSetup
type of installer, but they're relatively rarely used I think.

-Peter


From kent37 at tds.net  Wed Feb 23 17:36:31 2005
From: kent37 at tds.net (Kent Johnson)
Date: Wed, 23 Feb 2005 17:36:31 -0500
Subject: unicode(obj, errors='foo') raises TypeError - bug?
In-Reply-To: <421ceb68$0$7105$9b622d9e@news.freenet.de>
References: <mailman.2958.1109141791.22381.python-list@python.org>
	<ydWdndBX1-sXrYHfRVn-vQ@comcast.com>
	<421c786a$1_1@newspeer2.tds.net>
	<_vOdnZ_efPnIM4HfRVn-qQ@comcast.com>
	<421ceb68$0$7105$9b622d9e@news.freenet.de>
Message-ID: <421d024c$1_1@newspeer2.tds.net>

Martin v. L?wis wrote:
> Steven Bethard wrote:
> 
>> Yeah, I agree it's weird.  I suspect if someone supplied a patch for 
>> this behavior it would be accepted -- I don't think this should break 
>> backwards compatibility (much).
> 
> 
> Notice that the "right" thing to do would be to pass encoding and errors
> to __unicode__. If the string object needs to be told what encoding it
> is in, why not any other other object as well?
> 
> Unfortunately, this apparently was overlooked, and now it is too late
> to change it (or else the existing __unicode__ methods would all break
> if they suddenly get an encoding argument).

Could this be handled with a try / except in unicode()? Something like this:
  >>> class A:
  ...   def u(self):  # __unicode__ with no args
  ...     print 'A.u()'
  ...
  >>> class B:
  ...   def u(self, enc, err):  # __unicode__ with two args
  ...     print 'B.u()', enc, err
  ...
  >>> def convert(obj, enc='ascii', err='strict'): # unicode() function delegates to u()
  ...   try:
  ...     obj.u(enc, err)
  ...   except TypeError:
  ...     obj.u()
  ...
  >>> convert(a)
A.u()
  >>> convert(a, 'utf-8', 'replace')
A.u()
  >>> convert(b)
B.u() ascii strict
  >>> convert(b, 'utf-8', 'replace')
B.u() utf-8 replace

> 
> As for using encoding and errors on the result of str() conversion
> of the object: how can the caller know what encoding the result of
> str() is in, reasonably? 

The same way that the caller will know the encoding of a byte string, or of the result of 
str(some_object) - in my experience, usually by careful detective work on the source of the string 
or object followed by attempts to better understand and control the encoding used throughout the 
application.

It seems more correct to assume that the
> str() result in in the system default encoding.

To assume that in absence of any guidance, sure, that is consistent. But to ignore the guidance the 
programmer attempts to provide?


One thing that hasn't been pointed out in this thread yet is that the OP could just define 
__unicode__() on his class to do what he wants...

Kent


From cam.ac.uk at mh391.invalid  Tue Feb 22 19:16:35 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Wed, 23 Feb 2005 00:16:35 +0000
Subject: Writting to specific location in a file
In-Reply-To: <1109116948.068647.147540@f14g2000cwb.googlegroups.com>
References: <1109116948.068647.147540@f14g2000cwb.googlegroups.com>
Message-ID: <cvgi18$h59$1@gemini.csx.cam.ac.uk>

artixan at gmail.com wrote:

> My chanllenge  is that each field needs to have a exact specific
> position in the output file.
> For instance a_field needs to start at position 2 in the line, b_fields
> at position 18 and so on, for all the fields on each line.

You can use string formatting operations:

row = ("a", "b")
print "  %-16s%-16s" % row

http://docs.python.org/lib/typesseq-strings.html
-- 
Michael Hoffman


From grante at visi.com  Mon Feb  7 15:00:27 2005
From: grante at visi.com (Grant Edwards)
Date: 07 Feb 2005 20:00:27 GMT
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
Message-ID: <4207c8db$0$21623$a1866201@visi.com>

On 2005-02-07, Luke Skywalker <luke at tatooine.planet> wrote:
> On Mon, 7 Feb 2005 19:41:11 +0100, "Fredrik Lundh"
><fredrik at pythonware.com> wrote:
>>> Am I totally off-target?
>>
>>yes.  for details, see the "Combining work with code released under the
>>GPL" section on this page:
>
> Mmmm.. The FAQ isn't very clear about whether it's allowed to write a
> proprietary EXE that calls a GPLed DLL:

Yes it is allowed.  You are always allowed to write proprietary
programs that incorporate GPL code.  What you are not allowed
to do is distribute those programs under a license that's not
the GPL.

> Considering the fact that the Qt DLL exist by themselves, that the
> version used is the one provided by Qt, and that the EXE uses a
> standard, open way to communicate with it, the above does seem to say
> this use would be valid. Anybody knows of a similar case and the
> output?

My understanding is that what you propose is not valid.  An EXE
that uses a GPL'd DLL must be distributed according to the
terms of the GPL.  Were that not the case, the LGPL would not
have been needed.

-- 
Grant Edwards                   grante             Yow!  Yow! Maybe I should
                                  at               have asked for my Neutron
                               visi.com            Bomb in PAISLEY--


From danperl at rogers.com  Fri Feb  4 09:20:30 2005
From: danperl at rogers.com (Dan Perl)
Date: Fri, 4 Feb 2005 09:20:30 -0500
Subject: advice needed for simple python web app
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
	<ctv48p$75$1@eeyore.INS.cwru.edu>
	<N86dnZ7k56I3gJ7fRVn-tg@rogers.com>
	<7xis58reac.fsf@ruckus.brouhaha.com>
Message-ID: <zsKdnThuwKcpGZ7fRVn-hA@rogers.com>


"Paul Rubin" <http://phr.cx at NOSPAM.invalid> wrote in message 
news:7xis58reac.fsf at ruckus.brouhaha.com...
> If you're just trying to get a conceptual understanding of web
> programming, I suggest you start with cgi.
>
> Next you might want to read Philip and Alex's Guide to Web Publishing:
>
>  http://philip.greenspun.com/panda/
>
> It's out of date and the examples use Tcl and Oracle instead of
> Python, but it's still a good explanation of how database-driven web
> sites work.  The rest (like languages frameworks) is just a matter of
> picking some implementation parameters.

This matches pretty much what I've decided to do.  I'll start with cgi and 
CGIHTTPServer because I'll learn more from that and then move to a 
framework, quite likely CherryPy, although by that time I may change my 
choice.  Philip Greenspun's book looks good and I'll have to go through it. 
Thanks for the advice. 




From Scott.Daniels at Acm.Org  Sat Feb 26 12:55:32 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 26 Feb 2005 09:55:32 -0800
Subject: strange SyntaxError
In-Reply-To: <mailman.3083.1109395955.22381.python-list@python.org>
References: <mailman.3044.1109338441.22381.python-list@python.org>	<421f39c7$1@nntp0.pdx.net>
	<mailman.3083.1109395955.22381.python-list@python.org>
Message-ID: <4220b3df$1@nntp0.pdx.net>

Attila Szabo wrote:
> 2005, Feb 25 -> Scott David Daniels wrote :
>>Attila Szabo wrote:
 >>...    lambda x: 'ABC%s' % str(x) ...
>>OK, to no real effect, in main you define an unnamed function that
>>you can never reference.  Pretty silly, but I'll bite.

> This code was simplified, the lambda was part of a map, ...

I'm sorry, upon re-reading my reply, I see how it looks like a
snide comment.  I apologize.  I didn't mean to malign you, and
I did indeed appreciate that the code was obviously boiled down.
I just thought:
          def named(x):
              return 'ABC%s' % str(x)
provides a function name to talk about, exhibits the same problem,
and is "simpler".

--Scott David Daniels
Scott.Daniels at Acm.Org




From ggrp1.20.martineau at dfgh.net  Wed Feb 16 16:47:53 2005
From: ggrp1.20.martineau at dfgh.net (Martin)
Date: 16 Feb 2005 13:47:53 -0800
Subject: Can __new__ prevent __init__ from being called?
References: <87is4tldea.fsf@news2.ososo.de>
	<1108590024.760668.31280@z14g2000cwz.googlegroups.com>
Message-ID: <1108590473.780148.299240@g14g2000cwa.googlegroups.com>

I meant to say:

Although the base class __new__ does have to check to see if the
                        ^^^^^^^
instance is initialized, ...

not:

> Although the base class __init__ does have to check to see if the
> instance is initialized, ...



From gerrit at nl.linux.org  Mon Feb  7 04:55:47 2005
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Mon, 7 Feb 2005 10:55:47 +0100
Subject: Memory Allocation?
In-Reply-To: <8GCNd.9880$ya6.9761@trndny01>
References: <8GCNd.9880$ya6.9761@trndny01>
Message-ID: <20050207095547.GA29991@topjaklont.student.utwente.nl>

Chris S. wrote:
> Is it possible to determine how much memory is allocated by an arbitrary 
> Python object? There doesn't seem to be anything in the docs about this, 
> but considering that Python manages memory allocation, why would such a 
> module be more difficult to design than say, the GC?

Why do you want it?

regards,
Gerrit.

-- 
In the councils of government, we must guard against the acquisition of
unwarranted influence, whether sought or unsought, by the
military-industrial complex. The potential for the disastrous rise of
misplaced power exists and will persist.
    -Dwight David Eisenhower, January 17, 1961


From frank at chagford.com  Fri Feb  4 05:24:50 2005
From: frank at chagford.com (Frank Millman)
Date: 4 Feb 2005 02:24:50 -0800
Subject: Python 2.4 binaries for accessing PostgreSQL from Windows?
Message-ID: <1107512690.503191.8820@g14g2000cwa.googlegroups.com>

Hi all

The subject line says it all.

I have been using pypgsql to access PostgreSQL from Linux and from
Windows, and it works fine.

I am upgrading to Python 2.4. I can recompile pypgsql for Linux, but I
do not have a Windows compiler. SourceForge has a binary for Python
2.3, which is the one I have been using. It does not have one for 2.4.

I tried the psycopg site, but it does not seem to have binaries at all.

Does anyone know if either of these will be available in binary form
for Python 2.4 on Windows?

Thanks

Frank Millman



From ncoghlan at iinet.net.au  Sat Feb 19 21:22:21 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 20 Feb 2005 12:22:21 +1000
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <42155B60.3020808@swiftdsl.com.au>
References: <mailman.2744.1108629122.22381.python-list@python.org>	<4214A543.2000006@swiftdsl.com.au>	<Xns96009AC157257duncanrcpcouk@127.0.0.1>
	<42155B60.3020808@swiftdsl.com.au>
Message-ID: <4217F45D.8080805@iinet.net.au>

news.sydney.pipenetworks.com wrote:
> I see your point but I'm not totally convinced  I don't understand 
> unicode that well so I'll just be quiet now.

Unicode is horrible, but better than the available alternatives when it comes to 
character sets with more than 128 characters :)

> Your point about int and long vs str and unicode is interesting though. 
> Does it mean str and unicode will some time in the future be unified 
> once all the differences are sorted out ?

Eventually, all Python text strings will be unicode, with a separate type for 
manipulating a sequence of bytes. That's a long way away, though.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From aleaxit at yahoo.com  Sat Feb  5 10:17:10 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 5 Feb 2005 16:17:10 +0100
Subject: a type without a __mro__?
References: <1grid1l.7goks6hh1l6yN%aleaxit@yahoo.com>
	<mailman.1966.1107605854.22381.python-list@python.org>
Message-ID: <1griq2d.1ohw9vw10u40ljN%aleaxit@yahoo.com>

Fredrik Lundh <fredrik at pythonware.com> wrote:

> Alex Martelli wrote:
> 
> > Can anybody suggest where to find (within the standard library) or how
> > to easily make (e.g. in a C extension) a type without a __mro__, except
                                           ^^^^^^
> > for those (such as types.InstanceType) which are explicitly recorded in
> > the dispatch table copy._deepcopy_dispatch...?
> 
> something like this?
> 
> >>> import re
> >>> x = re.compile("")
> >>> x
> <_sre.SRE_Pattern object at 0x00B2F7A0>
> >>> x.__mro__
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AttributeError: __mro__

Alas, no -- wish it were so easy!  It does need to be a TYPE, not just
any object, to reproduce the bug that was reported about 2.3.5c1's
copy.py.  The relevant code in copy.py does the equivalent of:

>>> type(x).__mro__
(<type '_sre.SRE_Pattern'>, <type 'object'>)
>>> 

not of just x.__mro__, which would easily be made to fail.

How a type(whatever) can end up without a __mro__ in 2.3.* is rather
murky to me; looks like something strange must be happening wrt the
type's flags, or something.  Normal types such as _sre.SRE_Pattern, or
the Copyable type I put in _testcapi, just sprout an __mro__ without
even trying.  Ah well, thanks anyway -- guess I'll commit the fix (using
inspect.getmro(cls) rather than cls.__mro__) even though I don't have a
unit test to show it's necessary and sufficient:-(


Alex


From lbates at syscononline.com  Fri Feb  4 10:00:59 2005
From: lbates at syscononline.com (Larry Bates)
Date: Fri, 04 Feb 2005 09:00:59 -0600
Subject: mounting a filesystem?
In-Reply-To: <pan.2005.02.03.02.15.29.529501@dcs.nac.uci.edu>
References: <pan.2005.02.03.02.15.29.529501@dcs.nac.uci.edu>
Message-ID: <UtSdnWaxEbO4E57fRVn-sA@comcast.com>

There is smbmount, but I don't know what type of
filesystem you are looking for.

http://redclay.altervista.org/

Larry Bates


Dan Stromberg wrote:
> Is there a python module that can mount a filesystem?
> 
> More specifically, a loopback filesystem with a particular offset, under
> linux?
> 
> Thanks!
> 


From alan.mcintyre at esrgtech.com  Fri Feb  4 13:15:12 2005
From: alan.mcintyre at esrgtech.com (Alan McIntyre)
Date: Fri, 04 Feb 2005 13:15:12 -0500
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <mailman.1898.1107540160.22381.python-list@python.org>
References: <dvOMd.33656$EG1.19314@lakeread04>
	<mailman.1898.1107540160.22381.python-list@python.org>
Message-ID: <RYOMd.33660$EG1.3638@lakeread04>

Jack,

I'm not using 2.4 yet; still back in 2.3x. :)  Thanks for the examples, 
though - they are clear enough that I will probably use them when I upgrade.

Thanks,
Alan

Jack Diederich wrote:
> If you are using python2.4,
> 
> 
>>>>import itertools as it
>>>>[x[0] for (x) in it.groupby([0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5])]
> 
> [0, 1, 2, 3, 2, 4, 5]
> 
> 
> Since this is 2.4 you could also return a generator expression.
> 
> 
>>>>def iter_collapse(myList):
> 
> ...   return (x[0] for (x) in it.groupby([0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5]))
> ... 
> 
>>>>i = iter_collapse([0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5])
>>>>i
> 
> <generator object at 0xb7df6b2c>
> 
>>>>list(i)
> 
> [0, 1, 2, 3, 2, 4, 5]
> 
> 
> 
> -Jack
> 


From peter at engcorp.com  Sat Feb 19 20:38:18 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 19 Feb 2005 20:38:18 -0500
Subject: controlling a qbasic program on a windows98 or example of rs-232
 commanded through python
In-Reply-To: <1108850253.479488.78650@l41g2000cwc.googlegroups.com>
References: <1108850253.479488.78650@l41g2000cwc.googlegroups.com>
Message-ID: <2oGdnTWUGNAZd4rfRVn-1A@powergate.ca>

serpent17 at gmail.com wrote:
> Can python be installed on a win98 system ? 

Yes.  The Windows version of Python works on most versions of Windows
including Win98.

> if so, how do I control a qbasic program from python ?

Given the rest of your posting, I would say "don't bother".

> the qbasic program controls input to an RS-232 so I am enclined to
> follow the win98 system + qbasic route in order to be quick, or I guess
> the question could be, can I control a device through rs-232 from a
> newer version of windows using python (actually for the last part of
> the question I know this is feasible, but I 'd like to see an example,
> any pointers ?)

Download PySerial and you'll easily be able to do this.  There
are doubtless numerous examples you could find easily with
Google, but if you really want to look at an example of one
that is too complex to be of much use for basic learning purposes,
check this out: http://web.engcorp.com/main/projects/CavroCom .

There's a lot more here than just the serial port stuff, but it
*is* an example of working code that is in actual use, so
perhaps it's better in some ways than some snippets you might
find.  Still, PySerial is pretty darn easy to use, so don't
waste too much time looking at the above project.  The following
shows how to send data to a device using PySerial and receive
a reply:

 >>> import serial
 >>> s = serial.Serial('COM1')
 >>> s.timeout = 1
 >>> s.write('some command\r\n')
 >>> s.read(50)
'some reply\r\n'
 >>>

It's about that easy...

-Peter


From deetsNOSPAM at web.de  Wed Feb  2 05:50:32 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 02 Feb 2005 11:50:32 +0100
Subject: Python Code Auditing Tool
References: <pan.2005.02.02.05.47.52.827795@flaminglunchbox.net>	<7xhdkvbjab.fsf@ruckus.brouhaha.com>	<pan.2005.02.02.06.14.14.516276@flaminglunchbox.net>
	<36bko9F4mft0dU1@individual.net>
	<mailman.1744.1107339178.22381.python-list@python.org>
Message-ID: <36bpefF4uci0mU1@individual.net>

Hi,

>    I'm afraid that the only reliable way to gather what exceptions are
> raised is to read docs and/or come up with test cases.  This has been a
> bugbear of mine in Python as it's not common to find a nice :Exceptions:
> IOError <desc>, IllegalArgumentError <desc> type of description in the
> docs.
> 
>     However if you want an incomplete test, you could parse the code and
> check for raises and retrieve the class name of the exception - however
> this would be patchy at best.  Therefore it would sort of negate the
> point of doing the analysis in the first place.

I don't want that  - the OP wants. I agree with you.
 
>           Even in Java you cannot find every exception that will be
> thrown, only 'checked' exceptions but this is a percentage of all the
> exceptions (BTW why do you throw SystemException - it's a CORBA
> exception!  OK, it's a runtime exception but why not just simply extend
> RuntimeException?).  Also, if someone ever puts - catch (Exception e){}
> in their code they deserve to be kneecapped, IMHO the fault is with
> sloppy coding not with the supplied tools.

Most probably I throw RuntimeException - that was out of my head, I luckily
I haven't been coding java too much lately :)

>     Unfortunately its docs and testing again, that's why we get paid (if
> you're doing a job) or not paid (if you're doing it for fun!).  Although
> one language which comes closer is Eiffel which has require and ensure
> clauses on every method (following Meyer's Programming by contract
> philosophy).

Full ack again. 

-- 
Regards,

Diez B. Roggisch


From ktm-void at altern.org  Wed Feb 23 14:28:08 2005
From: ktm-void at altern.org (Ktm)
Date: Wed, 23 Feb 2005 20:28:08 +0100
Subject: select + ssl
Message-ID: <cvilj2$p8u$1@aphrodite.grec.isp.9tel.net>

Hello,

I don't have the same behaviour with two codes who are quite the same,
one using SSL, the other not. I tested the programs with stunnel and
telnet , respectively.

Here are the first code :
------------------------------------------------------------------------------------------------------------------------------------------------
#!/usr/bin/python

from select import select
import socket

if __name__ == '__main__':
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.bind(('', 6001))
    s.listen(5)

    ready_read = {}
    ready_send = {}

    ready_read[s] = s
    while True:
        rs, ws, _ = select(ready_read.keys(), ready_send.keys(), [], 2)
        print '.'
        for r in rs:
            if r == s:
                (cli, addr) = s.accept()
                ready_send[cli] = cli
                ready_read[cli] = cli
            else:
                ret = r.recv(1000)
                print 'ret =', ret
        for w in ws:
            w.send('you have to give up')
------------------------------------------------------------------------------------------------------------------------------------------------ 


  The client receive the 'you have to give up' sentence every two seconds.

The second code is :
------------------------------------------------------------------------------------------------------------------------------------------------ 


#!/usr/bin/python

from select import select
import socket
from   OpenSSL import SSL
import os

def verify_cb():
    return ok

if __name__ == '__main__':
    dir = ''
    ctx = SSL.Context(SSL.SSLv23_METHOD)
    ctx.set_options(SSL.OP_NO_SSLv2)
    ctx.set_verify(SSL.VERIFY_NONE, verify_cb)
    ctx.use_privatekey_file (os.path.join(dir, 'server.pkey'))
    ctx.use_certificate_file(os.path.join(dir, 'server.cert'))
    ctx.load_verify_locations(os.path.join(dir, 'CA.cert'))

    s = SSL.Connection(ctx, socket.socket(socket.AF_INET,
socket.SOCK_STREAM))
    #s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.bind(('', 6000))
    s.listen(5)
    s.setblocking(0)

    ready_read = {}
    ready_send = {}

    ready_read[s] = s
    while True:
        rs, ws, _ = select(ready_read.keys(), ready_send.keys(), [], 2)
        print '.'
        for r in rs:
            if r == s:
                (cli, addr) = s.accept()
                ready_send[cli] = cli
                ready_read[cli] = cli
            else:
                ret = r.recv(1000)
                print 'ret =', ret
        for w in ws:
            w.send('you have to give up')

------------------------------------------------------------------------------------------------------------------------------------------------ 



The server blocks on recv here.

In both case I don't send anything with the client. (Perhaps stunnel
send something that I don't see ?)

Why does the server block ?

Kototama


From removethis.kartic.krishnamurthy at gmail.com  Fri Feb 11 21:54:18 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Sat, 12 Feb 2005 02:54:18 GMT
Subject: Python UPS / FedEx Shipping Module
In-Reply-To: <mailman.2411.1108149803.22381.python-list@python.org>
References: <mailman.2411.1108149803.22381.python-list@python.org>
Message-ID: <udePd.660$nC5.453@twister.nyroc.rr.com>

Gabriel Cooper said the following on 2/11/2005 2:23 PM:
> I've made UPS and FedEx shipping rate request modules in python using 
> XML. Is there an interest in putting this on the web?

I am interested in it for educational value, if not anything else. 
Please post the web address from which to download.

Thanks!
-Kartic


From dbickett at gmail.com  Wed Feb  2 22:22:27 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Wed, 2 Feb 2005 22:22:27 -0500
Subject: streaming a file object through re.finditer
In-Reply-To: <1107397107.667600.326820@o13g2000cwo.googlegroups.com>
References: <1107396145.400036.271010@g14g2000cwa.googlegroups.com>
	<mailman.1785.1107396839.22381.python-list@python.org>
	<1107397107.667600.326820@o13g2000cwo.googlegroups.com>
Message-ID: <1d6cdae3050202192254dcb3d0@mail.gmail.com>

Erick wrote:
> True, but it doesn't work with multiline regular expressions :(

If your intent is for the expression to traverse multiple lines (and
possibly match *across* multiple lines,) then, as far as I know, you
have no choice but to load the whole file into memory.

-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From bearophileHUGS at lycos.com  Tue Feb 22 16:53:43 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 22 Feb 2005 13:53:43 -0800
Subject: intersection of 2 list of pairs
In-Reply-To: <1109025988.849629.318130@z14g2000cwz.googlegroups.com>
References: <1108920276.253388.23590@f14g2000cwb.googlegroups.com>
	<4219d31b$0$17249$8fcfb975@news.wanadoo.fr>
	<1109025988.849629.318130@z14g2000cwz.googlegroups.com>
Message-ID: <1109109223.632208.191040@o13g2000cwo.googlegroups.com>

The use of frozenset can okay when sub-sequences are longer, but for
this problem it's slow, and anyway there are situations of repeated
data like this that have to be considered:

frozenset( ('a', 'a') )
==>
frozenset(['a'])

For Py2.4 the faster and better solution seems Peter Otten one.
James Stroud solution is O(n^2) and it can become slow for long
lists...

Bear hugs,
Bearophile



From mdraghi at prosud.com  Tue Feb 22 07:51:35 2005
From: mdraghi at prosud.com (Mariano Draghi)
Date: Tue, 22 Feb 2005 09:51:35 -0300
Subject: UTF-8 / German,
 Scandinavian letters - is it really this difficult??
 Linux &   Windows XP
In-Reply-To: <cve1vh$c37$1@phys-news1.kolumbus.fi>
References: <cve1vh$c37$1@phys-news1.kolumbus.fi>
Message-ID: <cvf9mk$r6o$1@sea.gmane.org>

Hace mucho tiempo en una galaxia muy, muy lejana, Mike Dee escribi?:
>    A very very basic UTF-8 question that's driving me nuts:
> 
> If I have this in the beginning of my Python script in Linux:
> 
> #!/usr/bin/env python
> # -*- coding: UTF-8 -*-
> 
> should I - or should I not - be able to use non-ASCII characters 
> in strings and in Tk GUI button labels and GUI window titles and in 
> raw_input data without Python returning wrong case in manipulated 
> strings and/or gibberished characters in Tk GUI title? 
...

I'd recommend reading "The Absolute Minimum Every Software Developer 
Absolutely, Positively Must Know About Unicode and Character Sets (No 
Excuses!)", by Joel Spolsky:
- http://www.joelonsoftware.com/articles/Unicode.html

It's not based on Python (nor any other language either...), but I find 
it *very* useful.

Regards,

-- 
Mariano



From dotpyFE at gmail.com  Fri Feb 25 20:34:32 2005
From: dotpyFE at gmail.com (Lucas Raab)
Date: Sat, 26 Feb 2005 01:34:32 GMT
Subject: weird strings question
Message-ID: <ImQTd.7095$Ba3.1886@newsread2.news.atl.earthlink.net>

Is it possible to assign a string a numerical value?? For example, in 
the string "test" can I assign a number to each letter as in "t" = 45, 
"e" =  89, "s" = 54, and so on and so forth??

TIA


From danb_83 at yahoo.com  Fri Feb 11 14:30:51 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 11 Feb 2005 11:30:51 -0800
Subject: check if object is number
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
Message-ID: <1108150251.289441.170680@c13g2000cwb.googlegroups.com>

Steven Bethard wrote:
> Is there a good way to determine if an object is a numeric type?
> Generally, I avoid type-checks in favor of try/except blocks, but I'm

> not sure what to do in this case:
>
>      def f(i):
>          ...
>          if x < i:
>              ...
>
> The problem is, no error will be thrown if 'i' is, say, a string:
>
> py> 1 < 'a'
> True
> py> 10000000000 < 'a'
> True
>
> But for my code, passing a string is bad, so I'd like to provide an
> appropriate error.
>
> I thought about calling int() on the value, but this will also allow
> some strings (e.g. '1').  I guess this isn't horrible, but it seems
> somewhat suboptimal...

How about this?

... def is_number(x):
...    try:
...       x + 1
...       return True
...    except TypeError:
...       return False



From erikbethke at gmail.com  Wed Feb  9 08:17:56 2005
From: erikbethke at gmail.com (Erik  Bethke)
Date: 9 Feb 2005 05:17:56 -0800
Subject: Trouble with the encoding of os.getcwd() in Korean Windows
In-Reply-To: <1107953764.478501.176650@c13g2000cwb.googlegroups.com>
References: <1107953764.478501.176650@c13g2000cwb.googlegroups.com>
Message-ID: <1107955076.538121.23830@z14g2000cwz.googlegroups.com>

Hello All,

Well as usual, after I post I keep on digging and I found the answer...

http://cjkpython.i18n.org/

Has the encodings for Chinese, Korean and Japanese... and I took the
hint that I found from the foundationstore and tried cp949 and wa-la!
it works...

Now, the question remains, how do I write windows python code that will
work on all flavors of windows languages?  The wxPython demo works,
because I have installed it on a path on my machine that does not have
Hangul in the path.  But if I distribute something to end users, they
most certainly have Hangul in their path, or Japanese or Chinese, or
some other encoding... so how do you get the correct encoding from the
system?

Thanks,
-Erik



From skip at pobox.com  Wed Feb 16 15:24:02 2005
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 16 Feb 2005 14:24:02 -0600
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
Message-ID: <16915.44002.242405.91388@montanaro.dyndns.org>


    John> 4. For consistency, would you like "1" + 2 to produce "12"?

No, the correct answer is obviously 3. ;-)

S


From Serge.Orlov at gmail.com  Sat Feb 19 05:51:13 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: Sat, 19 Feb 2005 13:51:13 +0300
Subject: unicode and socket
References: <1108753426.318777.275250@c13g2000cwb.googlegroups.com>
	<opsmeqf1w76yt6e7@news.cisco.com>
	<1108782636.359541.99450@z14g2000cwz.googlegroups.com>
Message-ID: <cv75n2$ij9$1@news.comcor-tv.ru>

zyqnews at 163.net wrote:
> It's really funny, I cannot send a unicode stream throuth socket with
> python while all the other languages as perl,c and java can do it.

You may really start laughing loudly <wink> after you find out that you
can  send arbitrary python objects over sockets. If you want language
specific way of sending objects, see Irmen's first answer: use pickle.

> then, how about converting the unicode string to a binary stream?

Sure, there are already three answers in this thread that suggest you
to do that. Use encode method of unicode strings.

> It is possible to send a binary through socket with python?

Sure. If it wouldn't be possible to send bytes through sockets with Python
what else do you think could be sent? Perhaps you're confused that
bytes are stored in byte strings in Python, which are often called strings in
documentation and conversations? It will be fixed in Python 3.0, but
these days you have to store bytes in str type.

  Serge.






From steven.bethard at gmail.com  Fri Feb 11 17:41:43 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 11 Feb 2005 15:41:43 -0700
Subject: check if object is number
In-Reply-To: <374lklF5b20klU1@individual.net>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
	<374ho0F560ughU1@individual.net>
	<66WdnbJbuf5yj5DfRVn-iA@comcast.com>
	<374lklF5b20klU1@individual.net>
Message-ID: <Rbydncek9t43qZDfRVn-sQ@comcast.com>

George Sakkis wrote:
>>George Sakkis wrote:
>>
>>>"Steven Bethard" <steven.bethard at gmail.com> wrote in message
>>>news:gcidnb9g_ojxnpDfRVn-tA at comcast.com...
>>>
>>>>Is there a good way to determine if an object is a numeric type?
>>>
>>>In your example, what does your application consider to be numeric?
>>
>>Well, here's the basic code:
>>
>>def f(max=None):
>>     ...
>>     while max is None or n <= max:
>>         ...
>>         # complicated incrementing of n
>>
>>So for 'max', technically all I need is <= support.  However, the code
>>also depends on the fact that after incrementing 'n' enough, it will
>>eventually exceed 'max'.  Currently, ints, longs, floats, and Decimals
>>will all meet this behavior.  But I'd rather not specify only those 4
>>(e.g. with a typecheck), since someone could relatively easily create
>>their own new numeric type with the same behavior.  Do you know a better
>>way to test for this kind of behavior?
> 
> The problem is more conceptional rather than technical.

Yup.

> So what you're saying is that 3 <= "3.0" should not be allowed, but
> 3 <= SomeUserDefinedNumericClass(3) is ok, although your program knows
> nothing a priori about SomeUserDefinedNumericClass. The idea suggested
> before, try if "x+1" fails or not does not get you far; any class that
> overrides __add__ may fool this test:
> 
> class Dummy:
>     def __add__(self,other):
>         return 0

Right but by the same logic, we can fool protocols that are builtin to 
Python:

py> class C(object):
...     def __iter__(self):
...         return 0
...
py> for x in C():
...     print x
...
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
TypeError: iter() returned non-iterator of type 'int'

I'm not trying to catch the case where someone is deliberately violating 
the protocol.  Only the case where they've provided an object that 
doesn't conform to the protcol.


Clearly, complex objects don't conform to the protocol I want -- they 
don't support comparisons to ints.  This is easy to check:

try:
     x <= 1
except TypeError:
     raise TypeError('%s does not support comparisons to ints' %
                     type(x).__name__)

Now str objects also don't conform my protocol -- they aren't comparable 
to integers in any meaningful sense.  Ideally, I should be able to use 
the same code as above for str objects (and get a TypeError like "str 
objects cannot be compared with int objects"), but unfortunately, the 
Python wart of cross-type default comparisons gets in the way.  I look 
forward to the day when Python 3.0 removes such comparisons.  =)

Steve


From nick at craig-wood.com  Wed Feb  9 05:31:22 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 09 Feb 2005 10:31:22 GMT
Subject: Is Python as capable as Perl for sysadmin work?
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
	<mailman.2204.1107885796.22381.python-list@python.org>
Message-ID: <slrnd0jmo5.l3u.nick@irishsea.home.craig-wood.com>

Jeff Epler <jepler at unpythonic.net> wrote:
>  Finally, Python just doesn't respond to threats as well as Perl does.
>  I have run into many Perl programs that just didn't quite work right
>  until I wrote '... or die "$!"' in the right places.

I find

  '... or die "You $@$!"'

works even better ;-)

Thanks for a very amusing post!
-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From aleaxit at yahoo.com  Sat Feb  5 04:37:11 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 5 Feb 2005 10:37:11 +0100
Subject: changing local namespace of a function
References: <cu0lru$8ik$1@joe.rice.edu> <cu0sj5$sfk$1@sea.gmane.org>
	<4204400C.5060608@iinet.net.au>
	<mailman.1948.1107575575.22381.python-list@python.org>
	<cu1l9o$3oq$1@joe.rice.edu>
Message-ID: <1griamw.a425vd8qqrklN%aleaxit@yahoo.com>

Bo Peng <bpeng at rice.edu> wrote:
   ...
> Thank again for everyone's help. I have learned a lot from the posts,
> especially the wrapdict class.

Hmmm, you do realize that wrapdict uses a lot of indirection while my
equivalent approach, just posted, is very direct, right?  To reiterate
the latter, and dress it up nicely too, it's

class wrapwell(object):
    def __init__(self, somedict):
        self.__dict__ = somedict

and use d=wrapwell(whateverdict) to make the wrapper.  Now, reading or
writing d.x is just like reading or writing whateverdict['x'], etc etc.


Alex


From fuzzyman at gmail.com  Wed Feb 16 04:04:40 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 16 Feb 2005 01:04:40 -0800
Subject: [newbie]How to install python under DOS and is there any
	Wxpython can be installed under dos?
In-Reply-To: <mailman.2672.1108527494.22381.python-list@python.org>
References: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
	<mailman.2672.1108527494.22381.python-list@python.org>
Message-ID: <1108544680.151935.214420@o13g2000cwo.googlegroups.com>

Hans Nowak built some old DOS binaries... although I believe on his
website he points to a more 'modern' projects. Sorry - restricted
internet or I would check for you.

Try http://zephyrfalcon.org

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From chrisks at NOSPAM.udel.edu  Mon Feb  7 19:26:18 2005
From: chrisks at NOSPAM.udel.edu (Chris S.)
Date: Tue, 08 Feb 2005 00:26:18 GMT
Subject: Memory Allocation?
In-Reply-To: <donn-0E17FC.09400107022005@gnus01.u.washington.edu>
References: <8GCNd.9880$ya6.9761@trndny01>
	<donn-0E17FC.09400107022005@gnus01.u.washington.edu>
Message-ID: <KGTNd.14501$f%5.7760@trndny03>

Donn Cave wrote:
> In article <8GCNd.9880$ya6.9761 at trndny01>,
>  "Chris S." <chrisks at NOSPAM.udel.edu> wrote:
> 
> 
>>Is it possible to determine how much memory is allocated by an arbitrary 
>>Python object? There doesn't seem to be anything in the docs about this, 
>>but considering that Python manages memory allocation, why would such a 
>>module be more difficult to design than say, the GC?
> 
> 
> Sorry, I didn't follow that - such a module as what?

GC == Garbage Collector (http://docs.python.org/lib/module-gc.html)

> Along with the kind of complicated internal implementation
> details, you may need to consider the possibility that the
> platform malloc() may reserve more than the allocated amount,
> for its own bookkeeping but also for alignment.  It isn't
> a reliable guide by any means, but something like this might
> be at least entertaining -
> 
>    >>> 
>    >>> class A:
>    ...     def __init__(self, a):
>    ...             self.a = a
>    ... 
>    >>> d = map(id, map(A, [0]*32))
>    >>> d.sort()
>    >>> k = 0
>    >>> for i in d:
>    ...     print i - k
>    ...     k = i
>    ... 
> 
> This depends on the fact that id(a) returns a's storage
> address.
> 
> I get very different results from one platform to another,
> and I'm not sure what they mean, but at a guess, I think
> you will see a fairly small number, like 40 or 48, that
> represents the immediate allocation for the object, and
> then a lot of intervals three or four times larger that
> represent all the memory allocated in the course of creating
> it.  It isn't clear that this is all still allocated -
> malloc() doesn't necessarily reuse a freed block right
> away, and in fact the most interesting thing about this
> experiment is how different this part looks on different
> platforms.  Of course we're still a bit in the dark as
> to how much memory is really allocated for overhead.
> 
>    Donn Cave, donn at u.washington.edu

Are you referring to Python's general method of memory management? I was 
under the impression that the ISO C specification for malloc() dictates 
allocation of a fixed amount of memory. free(), not malloc(), handles 
deallocation. Am I wrong? Does Python use a custom non-standard 
implementation of malloc()?


From nav+posts at bandersnatch.org  Thu Feb 17 22:44:55 2005
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: Thu, 17 Feb 2005 22:44:55 -0500
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<37hqlrF59l2b2U1@individual.net>
	<873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<421450CC.9080504@swiftdsl.com.au>
	<87psyz8h9o.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<4214A800.4010509@swiftdsl.com.au>
	<pan.2005.02.17.15.13.36.917107@jerf.org>
	<42155DAF.4010806@swiftdsl.com.au>
Message-ID: <87hdka8rbc.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>

"news.sydney.pipenetworks.com" <nytimes at swiftdsl.com.au> writes:

> I always wished computer science was more engineering then
> philosophy. That way there'd always be an obvious answer.

You don't have a lot of experience with philosophers, do you?

Most of them are quite willing to go on at great length about the
obvious answer to just about any question... You get a dozen obvious
answers with every twelve philosophers.

Nick 

p.s. I've been working on a philosophy degree for about... 15 years
now.

-- 
#  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this to a python
print reduce(lambda x,y:x+chr(ord(y)-1),' Ojdl!Wbshjti!=obwAcboefstobudi/psh?')


From anthra.norell at tiscalinet.ch  Fri Feb 11 06:55:32 2005
From: anthra.norell at tiscalinet.ch (Anthra Norell)
Date: Fri, 11 Feb 2005 12:55:32 +0100
Subject: Speed of IDLE output degrades to 'unusable' after upgrade to Python
	2.4
Message-ID: <001101c51030$975175e0$0201a8c0@mcuf7>

Upgraded from 2.2.2 to 2.4 and all seems to work as before except the output to the IDLE window is now twenty times slower than it was before. The statement 
   for i in range (100): print i
now takes about forty-five seconds to complete! It used to be two seconds.
Python 2.4 on Windows ME.
Hints will be received gratefully by

Frederic





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From mjackson at alumni.caltech.edu  Mon Feb  7 19:32:47 2005
From: mjackson at alumni.caltech.edu (Mark Jackson)
Date: 8 Feb 2005 00:32:47 GMT
Subject: negative integer division
References: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
Message-ID: <cu91bf$9nk$1@news.wrc.xerox.com>

Imbaud Pierre <pierre.imbaud at wanadoo.fr> writes:
> integer division and modulo gives different results in c and python, 
> when negative numbers
> are involved. take gdb as a widely available c interpreter
>   print -2 /3
> 0 for c, -1 for python.
> more amazing, modulos of negative number give negative values! (in c).
> from an algebraic point of view, python seems right, but I thought 
> python conformity to the underlying c compiler was a strong commitment, 

AIUI the C standard is silent on the issue, and hence the C behavior is
implementation-dependent.  Anyway back in 2000 I found and fixed a
Y2K-related problem in an open-source C program (xvtdl) which was down
to precisely this misbehavior.  While diagnosing the problem I
implemented the algorithm in Python for test purposes, and was led
astray for a while by the fact that it *didn't* fail!

A:  42

Q:  What multiple of 7 did I add to the critical expression in the Zeller
    algorithm so it would remain nonnegative for the next few centuries?

-- 
Mark Jackson - http://www.alumni.caltech.edu/~mjackson
	People who write obscurely are either unskilled in writing
	or up to mischief.		- Sir Peter Medawar




From ilias at lazaridis.com  Sat Feb 19 09:23:35 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sat, 19 Feb 2005 16:23:35 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <42172136$0$27576$9b622d9e@news.freenet.de>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
Message-ID: <cv7i57$d0v$1@usenet.otenet.gr>

Martin v. L?wis wrote:
> Ilias Lazaridis wrote:
> 
>> My questions:
> 
> It appears that nobody has answered the questions, yet.
> 
>> a) Why does the Python Foundation not provide additionally a binary 
>> version, compiled with MinGW or another open-source compiler?
> 
> We don't have the resources to do that.

Should a professional developer take python serious?

I mean, if the team does not manage at least the foundation of a 
multi-target automated-build-process?

[targets need not to be supported directly by the python team. They 
could be added/managed/maintained by community members]

>> b) Why does the Python Foundation not ensure, that the python 
>> source-code is directly compilable with MinGW?
> 
> In the past, we did not do that because we did not know how to do it.
> With Python 2.4.1, we now had a contribution that should allow direct
> compilation of extensions using MingW.

I'm refering to compile the main python source-code with MigGW.

[As a result, compilation of extensions under MinGW becomes trivial]

>> c) Why are the following efforts not _directly_ included in the python 
>> source code base?
>>
>> http://jove.prohosting.com/iwave/ipython/pyMinGW.html
> 
> I believe this was because it was never contributed to Python.

ok

You should possibly engourage the author to create an collaborative project.

>> d) Is it really neccessary that I dive into such adventures, to be 
>> able to do the most natural thing like: "developing python extensions 
>> with MinGW"?
>>
>> http://starship.python.net/crew/kernr/mingw32/Notes.html
> 
> No. These instructions are outdated.

ok

[the author has placed a remark now, avoiding this way further 
missunderstandings.]

>> e) Is there any official statement available regarding the msvcr71.dll 
>> and other MS licensing issues?
>>
>> [see several threads "[Python-Dev] Is msvcr71.dll re-redistributable?"]
>>
>> http://mail.python.org/pipermail/python-dev/2005-February/thread.html
> 
> No, there isn't.

Seeing the discussions which raise around this topic, I think the 
foundation should provide an official statement [e.g. contact MS to get 
an official statement].

>> f) Are there any official (Python Foundation) statements / rationales 
>> available, which explain why the MinGW compiler is unsupported, 
>> although parts of the community obviously like to use it?
>>
>> http://groups-beta.google.com/group/comp.lang.python/msg/dc3474e6c8053336
> 
> The official statement is that the MingW compiler is supported, indeed.

Thus the official statement should be possibly corrected.

  * Compiling Python source-code under MinGW is not directly supported.
  * Compliling extensions under MinGW leads possibly to problems.

> Regards,
> Martin

.

-- 
http://lazaridis.com


From vze4rx4y at verizon.net  Fri Feb  4 13:03:45 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Fri, 04 Feb 2005 18:03:45 GMT
Subject: returning True, False or None
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
Message-ID: <5OOMd.12446$W16.3365@trndny07>

"Steven Bethard"
> For a given list:
> * If all values are None, the function should return None.
> * If at least one value is True, the function should return True.
> * Otherwise, the function should return False.
 . . .
> Right now, my code looks like:
>
>      if True in lst:
>          return True
>      elif False in lst:
>          return False
>      else:
>          return None
>
> This has a light code smell for me though -- can anyone see a simpler
> way of writing this?


return max(lst)


Raymond Hettinger




From sjmachin at lexicon.net  Thu Feb 24 15:59:39 2005
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 25 Feb 2005 07:59:39 +1100
Subject: Mapping operator tokens to special methods
References: <1109271478.871224.272750@g14g2000cwa.googlegroups.com>
Message-ID: <v0gs11thcis6m6l4lb8cb95f4j2jrctdi0@4ax.com>

On 24 Feb 2005 10:57:58 -0800, jamesthiele.usenet at gmail.com wrote:

>I was starting to write a dictionary to map operator strings to their
>equivalent special methods such as:
>{
>  '+' : 'add',
>  '&' : 'and_'
>}
>
>The idea is to build a simple interactive calculator.
>
>and was wondering if there is already something like this builtin?

>>> eval('1+2')
3




From adam at cognitcorp.com  Sun Feb  6 03:02:14 2005
From: adam at cognitcorp.com (Adam DePrince)
Date: Sun, 06 Feb 2005 03:02:14 -0500
Subject: bytecode obfuscation
In-Reply-To: <ctu72f$fs3$1@nemesis.news.tpi.pl>
References: <mailman.1837.1107465982.22381.python-list@python.org>
	<ctu72f$fs3$1@nemesis.news.tpi.pl>
Message-ID: <1107676933.3948.71.camel@localhost.localdomain>

On Thu, 2005-02-03 at 16:58, Jarek Zgoda wrote:
> snacktime napisa?(a):
> 
> > Everything except the libraries that actually connect to the
> > bank networks would be open source, and those libraries aren't
> > something that you would even want to touch anyways.
> 
> This sounds suspicious to me. Really. Normal payment clearance programs 
> have open-spec API's.

Dare I suggest that closed source is a plea for rounding fraud?

No amount of obfuscation is going to help you.  Just look at the battles
between virii authors and anti-virus software firms.  Even as early as
the 80's, viruses were employing elaborate encryption schemes to "hide"
from virus scanners; virus scanners in return emulated the cpu for the
first couple thousand cycles in hopes of finishing the decryption and
seeing the virus.  Of course, virus authors responded with
for(x=0;x<1000000;x++) and the halting problem inspired game of chicken
raged on ... the difference with your situation is if somebody is using
obscurity as a form of security, then it means that your system is
reachable, and it is only a matter of money and time before the
obscurity becomes not very obscure.  

My humble recommendation is to put your efforts into educating those you
work with that if they secure their communication channel  it won't
matter if the protocol spec leaks to the world.  Your adversary won't
have an opportunity to talk to your service no matter how good their
implementation of your protocol.

The worst case if you depend on obscurity:  The bad guys are rounding
off your pennies as you read this.

The worse case if you depend on encryption and open your spec:  You get
to publish your code, but might get competition.

Just my $0.02.

Adam DePrince 




From greg at cosc.canterbury.ac.nz  Wed Feb  9 18:32:42 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Thu, 10 Feb 2005 12:32:42 +1300
Subject: Python as a machine tool (Re: Is Python as capable as Perl for
 sysadmin work?)
In-Reply-To: <mailman.2204.1107885796.22381.python-list@python.org>
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
	<mailman.2204.1107885796.22381.python-list@python.org>
Message-ID: <36vkt4F56h89lU1@individual.net>

Jeff Epler wrote:
> 
> Unlike Perl, Python implements only a *finite turning machine*

That's interesting -- I didn't know Python could be
used as a lathe. You learn something new every day!

I suppose an "infinite turning machine" would
be a really *big* lathe...

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From peter at somewhere.com  Tue Feb 15 11:55:56 2005
From: peter at somewhere.com (Peter Maas)
Date: Tue, 15 Feb 2005 17:55:56 +0100
Subject: replacing ASP/VBScript with Python
In-Reply-To: <cusnon$qhd$1@swifty.westend.com>
References: <cusnon$qhd$1@swifty.westend.com>
Message-ID: <cusv5l$4hl$1@swifty.westend.com>

Peter Maas schrieb:
> I have inherited an extremely messy ASP/VBScript application which
> is a pain for me to support. Now the customer is thinking about a
> redesign. I'd like to rewrite the whole thing in Python but the app
> has to meet some conditions like
> 
> - IIS frontend
> - MSSQL db server
> - Win32 authentication
> - No 'ugly' URLs like http://server/cgi-bin/frontend.cgi?main.py
> - Performance: intranet with ~ 1000 users

In the meantime I have searched the internet and found plenty of options:

- plain cgi with fastcgi and mod_rewrite for IIS to transform the URL
- quixote cgi with fastcgi and mod_rewrite
- Webware + wkcgi
- Python ASP (registering Python with Pywin32 as ASP language)
- mxODBC + SQL ODBC driver
- pyADO + SQL MDAC driver

I'm now confident that it is doable and keen on finding out. The usual
question: what is the one and best way to do it? ;)

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From gargonx at gmail.com  Sun Feb 13 17:33:32 2005
From: gargonx at gmail.com (gargonx)
Date: 13 Feb 2005 14:33:32 -0800
Subject: help please
In-Reply-To: <j7udnc1ZGqsAUZLfRVn-3w@comcast.com>
References: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
	<TPKdnU2eEu9xPJPfRVn-vg@comcast.com>
	<1108260752.791847.180060@l41g2000cwc.googlegroups.com>
	<Z4ydnbKMDLVvEJLfRVn-hA@comcast.com>
	<1108324679.451793.147890@z14g2000cwz.googlegroups.com>
	<i_ydnb41nJ68IZLfRVn-gw@comcast.com>
	<1108329540.239064.144920@f14g2000cwb.googlegroups.com>
	<j7udnc1ZGqsAUZLfRVn-3w@comcast.com>
Message-ID: <1108334012.336816.221460@g14g2000cwa.googlegroups.com>

let's take the word "dogs"

   ext = dict("D":"V1",  "O":"M1", "G":"S1")
   std = dict("S":"H")

encode("DOGS") # proc()
we'll get: "V1M1S1H"

let's say i want to do just the opposite
word: "V1M1S1H"
decode("V1M1S1H")
    #how do i decode "V1" to "D", how do i keep the "V1" together?
and get: "DOGS"

#everything gets changed to uppercase



From mefjr75 at hotmail.com  Sat Feb  5 00:49:42 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 4 Feb 2005 21:49:42 -0800
Subject: WYSIWYG wxPython "IDE"....?
In-Reply-To: <1107560658.584623.303310@o13g2000cwo.googlegroups.com>
References: <1107560658.584623.303310@o13g2000cwo.googlegroups.com>
Message-ID: <1107582582.315879.187850@f14g2000cwb.googlegroups.com>

Yes you can use absolute positioning.
You do not need sizers ( but they are very nice )
Most all the widgets have a pos keyword in there constructor. Just use
them.

M.E.Farmer



From duncan.booth at invalid.invalid  Wed Feb 16 08:28:08 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 16 Feb 2005 13:28:08 GMT
Subject: super not working in __del__  ?
References: <cuu0pu$t44$1@sea.gmane.org>
	<mailman.2678.1108537188.22381.python-list@python.org>
	<Xns95FF5DA14D6F0duncanrcpcouk@127.0.0.1>
	<hjgbe2-vqe.ln1@pluto.i.infosense.no>
Message-ID: <Xns95FF88EC27E9Eduncanrcpcouk@127.0.0.1>

Ola Natvig wrote:
> Duncan Booth wrote:
>>>>>class Base(object):
>> 
>>      def __del__(self):
> 
> There should be a super(self.__class__, self)._del__() here if I'm not
> totaly wong, which could be the case here ;)
> 
> 
>>           print "Base.__del__"
>> 
>>           
> 

Thanks to Brian Beck for pointing out I hadn't read your question 
correctly.

There must not be a super call from the class Base. This is a common 
problem when using super: if the method you are propagating isn't defined 
by 'object' (and most aren't), then you must provide some way to terminate 
the chain of calls. One way to do this is to ensure that you have some base 
class which does not attempt to pass the call upwards. Then all you have to 
do is ensure that everything that has the method is a subclass of Base and 
this will ensure that the Base method will be the last method called in the 
super chain.

If I had included a super call:

>>> class Base(object):
	def __del__(self):
		print "Base.__del__"
		super(self.__class__, self).__del__()

		
>>> x = Base()
>>> del x
Base.__del__
Exception exceptions.AttributeError: "'super' object has no attribute 
'__del__'" in <bound method Base.__del__ of <__main__.Base object at 
0x00B43D90>> ignored
>>> 



From abkhd at earth.co.jp  Sat Feb 19 14:24:49 2005
From: abkhd at earth.co.jp (A.B., Khalid)
Date: 19 Feb 2005 11:24:49 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr> <cv7k8e$4pa$03$1@news.t-online.com>
	<cv7m2m$gp$1@usenet.otenet.gr> <cv7nh1$b57$03$1@news.t-online.com>
	<cv7r15$lhm$1@usenet.otenet.gr>
Message-ID: <1108841089.636568.292320@c13g2000cwb.googlegroups.com>

Ilias Lazaridis wrote:
> A.B., Khalid wrote:
> > Ilias Lazaridis wrote:
> >
> >>The first step is to make a pyMinGW project.
> >
> > You are mistaken. The first steps are the following:
> [...] - (nonrelevant comments)
>
> > 3) Realizing that there _is_ already a project called pyMinGW! That
it
> > does not fit your requirements-- whatever these maybe-- is an
> > altogether different issue. The fact of the matter remains that a
> > project _does_ exist, one which people (including myself) do in
fact
> > use; and because it does exist there is no reason to "make" it.
> [...]
>
> I've already understood your viewpoint.


You just say that you do. Your repeating the same arguments using the
same logic testifies that you don't.


>
> My requirements about an open-source project (or sub-project) are
very
> simple:


Your "requirements" are just what they are, _your_ requirements. And
since they are so, maybe you'd like to address them yourself instead of
continuing to complain how "your requirements" (simple or otherwise)
are not being met and that hence the author of this project is this,
and/or the entire language is that. Enough said here.


> You have the right to refuse this.
>
> I (and any other reader) have the right to derive our conclusions
about
> you and the reasons that you refuse a _real_ collaborative work.


Of course I have the right to do what I like (and as regards pyMinGW
this was explained earlier in this thread); your mere pronunciation
that I have that right neither subtracts nor adds to it one iota. And
it seems to me that the community has indeed reached some conclusions
which any reasonable person with a fair grasp of English can quickly
identify from the nature of their responses to you, here and elsewhere.


> > You already found the mingw-patch for building python. It is
> > added/managed/maintained by community members.
>
> This is a one-man-show, which does not invite to open collaboration
> (feedback is requested to closed email):
>
>
http://groups-beta.google.com/group/comp.lang.python/msg/98fa42dabff68db2
>
> python [foundation, crew, dictator, ...] should engourage open
> collaboration, should engourage _collaboration_.


Oh well, I hope it would not come as a shock to you that pyMinGW does
allow collaboration. Here is a quote from the pyMinGW-24 changes
document:

	---------------------
	pyMinGW-24-0064: Dec 11th, 2004
	---------------------
	[1] Included \PC\pyconfig.h in the Python24.iss. Thanks to Matthias
	    Gondan for the report and the fix.
	Quoted from http://jove.prohosting.com/iwave/ipython/pyMinGW-24.html


So you see, the collaborative effort is there. It is just not
responding to "your requirements" to your liking that is bothering you!
Now if you want to continue complaining about how "your requirements"
are not being met, by volunteers who make their work available for free
in their spare time, to your liking, go ahead. Knock yourself out.


Khalid



--
pyMinGW:
http://jove.prohosting.com/iwave/ipython/pyMinGW.html



From noreply at python.org  Tue Feb 15 10:03:16 2005
From: noreply at python.org (Bounced mail)
Date: Tue, 15 Feb 2005 16:03:16 +0100
Subject: Mail System Error - Returned Mail
Message-ID: <200502151505.j1FF5lux003066@phoenix.szarvas.hu>

The original message was received at Tue, 15 Feb 2005 16:03:16 +0100 from 193.83.236.20

----- The following addresses had permanent fatal errors -----
python-list at python.org



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From ilias at lazaridis.com  Sun Feb 20 14:30:06 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sun, 20 Feb 2005 21:30:06 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cuo71l$gig$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
Message-ID: <cvaoft$av6$1@usenet.otenet.gr>

Summarized Suggestions for the Python Team, PSF, Community):

-
-
-

An automated-build-process-system should allow community-members to add 
their targets (e.g. MinGW) into an special "incubation section", which 
does not in any way affect the "main section" (which contains the 
official production targets, e.g. MSVC).

If an "incubation section" target proves over time as stable and 
supported (by community contributions), it is moved to the 
"official-auto-build".

-


The python-team should
  * detect any efforts made within the community to support different 
build-targets
  * attract/engourage the authors/teams to include the patches/sources 
into the main build-system
  * attract/engourage the authors/teams to have open projects with an 
collaboration infrastructure.

-

The python-community and the PSF should support the python-team to 
fulfill the above tasks, thus the python-teams effort is limited to 
provide the infrastructure (incubation-build-targets).

-
-
-

Practical example:

Engourage the current pyMinGW project to become a open collaborative 
project:

http://jove.prohosting.com/iwave/ipython/pyMinGW.html

   * as a first step, setup a pyMinGW mailinglist
     * intrested people can come together an communicate
   * as a second step, setup an SVN
     * intrested projects could get your patch via SVN
   * as a third step, find intrested contributors
     * which would help testing
     * which would help you with coding

The python-team setups a build-target, which the collaborative pyMinGW 
project tries to make valid.

-
-
-

Now it's really time to close this thread.

.

-- 
http://lazaridis.com


From bvande at po-box.mcgill.ca  Tue Feb  1 12:42:44 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Tue, 01 Feb 2005 12:42:44 -0500
Subject: Where are list methods documented?
In-Reply-To: <41ffba7d$0$15879$a1866201@visi.com>
References: <41ffba7d$0$15879$a1866201@visi.com>
Message-ID: <41FFBF94.2010309@po-box.mcgill.ca>

Grant Edwards said unto the world upon 2005-02-01 12:21:
> I'm trying to figure out how to sort a list, and I've run into
> a problem that that I have tripped over constantly for years:
> where are the methods of basic types documented?  The only
> thing I can find on a list's sort() method is in the tutorial
> where it states:
> 
>    sort()
>        Sort the items of the list, in place. 
> 
> Doesn't the list method would accept a callable to be used as a
> comparison function?  Where is that sort of thing in the
> documentation?  I've looking in the library reference, the
> language reference, the global module index.
> 
> I have figured out I can do 
> 
> 
>>>>list.sort.__doc__
> 
> 'L.sort(cmpfunc=None) -- stable sort *IN PLACE*; cmpfunc(x, y) -> -1, 0, 1'
> 

Hi,

I'm not positive I understand what you are looking for, but do these 
help?:

<http://www.python.org/doc/2.4/lib/built-in-funcs.html#l2h-15>
<http://www.python.org/doc/2.4/lib/typesseq.html>
<http://www.python.org/doc/2.4/lib/typesseq-mutable.html>

Best,
Brian vdB


From jfabiani at yolo.com  Fri Feb 11 20:12:14 2005
From: jfabiani at yolo.com (John Fabiani)
Date: Sat, 12 Feb 2005 01:12:14 GMT
Subject: connecting to Sybase/MsSQL from python
Message-ID: <OJcPd.4065$aW6.3986@newssvr22.news.prodigy.net>

Hi,
I'm hoping someone on the list has connected to sybase/MsSQL with something
that works with DBAPI 2.0 from a linux box (SUSE 9.2) because I can't seem
to get it done.  I found Object Craft's python code that uses FreeTDS.  But
I can't get it compiled.  The code is looking for "sybdb.h" (first error) -
of course I don't have "sybdb.h".  It is not in Object Crafts code nor in
the FreeTDS source.  I'm guessing that I need sybase develop lib's but I
don't know where they are to be found.  

So is there a kind sole out there that can help with instructions on what is
needed to get python talking to MsSQL.

jOHN


From paul at westpoint.ltd.uk  Mon Feb  7 08:03:01 2005
From: paul at westpoint.ltd.uk (paul at westpoint.ltd.uk)
Date: 7 Feb 2005 05:03:01 -0800
Subject: Daemon module
Message-ID: <1107781381.495504.275960@o13g2000cwo.googlegroups.com>

Hi,

I find myself writing quite a few daemons in Python and have finally
gotten round to abstracting out a lot of the common code. You can find
my first attempt at a generic daemon module at:

  http://www.westpoint.ltd.uk/dist/daemon.py

It's not perfect, but it does work reliably for my purposes.

It would be great if people can use this as a starting point to develop
further features. I'd also be very interested in feedback about whether
the code does the right sequence of calls to start a daemon.

Best wishes,

Paul



From mt at 3planes.com  Mon Feb  7 11:52:15 2005
From: mt at 3planes.com (Michael Tobis)
Date: 7 Feb 2005 08:52:15 -0800
Subject: declarations summary
References: <1107750862.485179.61980@c13g2000cwb.googlegroups.com>
	<1grm033.wnee8f9w790oN%aleaxit@yahoo.com>
	<1107779276.262575.138240@f14g2000cwb.googlegroups.com>
Message-ID: <1107795135.135124.72850@l41g2000cwc.googlegroups.com>

Well, many scientists and engineers don't have the time, motivation or
ability to master the intricacies of recent fortran vintages either.
That's the problem.

Very large codes written by teams of software engineers for
well-delimited application spaces will continue to be written in some
version of Fortran. I hope the follwoing will explain why this causes
me difficulty.

Toy codes will probably move from Matlab to Python soon enough, if only
because Python, iPython and Matplotlib are free. It's the middle
ground, large codes as modified by single researchers, where much of
the real work of research gets done, and the infrastructure for this
use case is abysmal.

The near-term solution I'm coming to is code generation. As much as
possible I intend to present a clean Python interface to the scientist
and generate efficient compilable code behind their back.

Among the questions I'm trying to address is whether Python can or will
ever be so efficient that much of my work in this direction will be
abandoned. In that case, I can focus on the expression side, and leave
the efficiency question alone in the expectation that PyPy (or
something) will take care of it someday.

Another question is which language I should use as the back end. C or
even F77 can be coupled into the interactive environment on the fly.
Actual production work, of course, gains nothing from interactivity,
but we are still envisioning a significant scientist/developer use
case; in fact, that's the point.

Whether I like it or not, the group I work with is interested in is in
F90 source. (CCSM) This has proven awkward to integrate into Python,
though not impossible for some compilers thanks to the work of the
Babel and Chasm groups.

In practice, had the professional coders developing CCSM used C++
rather than Fortran90 (or even had they stuck to F77), we would be in a
better position to expose a well-defined low-complexity high-efficiency
layer to the non-CS specialist physical scientist. That's a mouthful, I
admit, but (trust me) the world would be a better place if it were
done.

So such advantages as do exist for a professional full-time
computational science group in developing CCSM in F90 have ended up as
a hindrance to what my constituency regards as the most important use
case.

Beliavsky's summary of what is available is a taxonomy of distinct
islands of production with tenuous connections between them. I don't
want quick-code slow-run "alternatives" to slow-code high-performance
production codes. I want, and my users need, a unified scientific
software environment which provides powerful expression without
sacrificing performance or interoperability.

Do I expect Fortran to go away? Not anytime soon. Do I expect an
alternative to emerge? Indeed I do, and I hope to be part of said
emergence. In fact, I don't know what the high-performance scientific
computer language of the year 2020 will look like, but I, for one,
would like it to be called "Python".

mt



From fredrik at pythonware.com  Mon Feb  7 15:04:24 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 7 Feb 2005 21:04:24 +0100
Subject: managing multiple subprocesses
References: <1107389416.531437.227160@l41g2000cwc.googlegroups.com>
	<cf052f0d.0502071145.1c0c9ee@posting.google.com>
Message-ID: <cu8hh9$neo$1@sea.gmane.org>

Oren Tirosh wrote:

>> os.systems / commands etc etc. I realise the subprocess module may have
>> what I need but I can't get python 2.4 on the Mac so I need a 2.3 based
>> solution. Any help is much appreciated. Cheers.
>
> The Python 2.4 subprocess module by Peter Astrand is pure python for
> posix systems (a small C extension module is required only for win32
> systems). You can bundle it with your code and use it with older
> Python versions. It even contains backward compatibility code to
> replace True and False if not found so it can run on Python 2.2.

footnote: a stand-alone distribution is available here:

    http://www.lysator.liu.se/~astrand/popen5/

direct link to the latest subprocess.py source:

    http://tinyurl.com/3mmka

</F> 





From helmi03 at gmail.com  Wed Feb 23 01:13:55 2005
From: helmi03 at gmail.com (helmi03 at gmail.com)
Date: 22 Feb 2005 22:13:55 -0800
Subject: user interface for python
In-Reply-To: <1109131790.140672.209730@l41g2000cwc.googlegroups.com>
References: <1109131790.140672.209730@l41g2000cwc.googlegroups.com>
Message-ID: <1109139235.733555.22960@l41g2000cwc.googlegroups.com>

Yes, wxpython is cross-platform. I also suggest pygtk for another
toolkit.



From jerf at jerf.org  Tue Feb  1 20:47:20 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 01 Feb 2005 20:47:20 -0500
Subject: Newbie Question
References: <mailman.1718.1107308479.22381.python-list@python.org>
Message-ID: <pan.2005.02.02.01.47.19.529221@jerf.org>

On Tue, 01 Feb 2005 17:47:39 -0800, Joel Eusebio wrote:
> Whenever I access test.py from my browser it says "The page cannot be
> found" , I have the file on /var/www/html, what did I miss?
> 
>  Thanks in advance,
> Joel

In general, you will need to post the relevant entries from your Apache
error log and access log. A lot of things can go wrong between your Python
script and final output. 

However, if you're getting a 404, it means that you haven't associated the
URL to the file correctly. Again, a lot of things can prevent this, so
you're also going to need to post the relevant Apache configuration files.
Without that, I can't be any more specific.

I'm also concerned that you are conflating mod_python with Python CGI,
which work completely differently when it comes to associating code to
URLs. In general, you won't access a mod_python script by typing in a
URL to a file; that will either try to run it as a CGI or just display it
(depending on the configuration). But we'll work on this when you post the
necessary information and we can see what you are trying to do.


From Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org  Mon Feb  7 16:11:33 2005
From: Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org (Alexander)
Date: Tue, 08 Feb 2005 00:11:33 +0300
Subject: variable declaration
References: <mailman.1978.1107622451.22381.python-list@python.org>
Message-ID: <MSGID_2=3A5025=2F3.131_420804dd@fidonet.org>

?????? Nick!

06 ??????? 2005 ? 02:54, Nick Coghlan ? ????? ?????? ? Python List ?????:
 NC> An alternate proposal, where the decision to request rebinding
 NC> semantics is made at the point of assignment:

 NC> epsilon = 0
 NC> S = 0
 NC> while epsilon < 10:
 NC>    S .= S + epsilon
 NC>    epselon .= epsilon + 1 #interpreter should show error here
 NC> print S
Well, I think

epsilon. = 0
S. = 0
while epsilon < 10:
  S = S + epsilon
  epselon = epsilon + 1 #interpreter should show error here
print S

will be little bit more pretty, from my point of view. Or may be smth like
this:
`S=0
~S=0
S~=0
S`=0
and so on. But, I think, your idea look more preaty than my previous (with var
keyword)


Alexander, zatv at bk.ru


From efrat_regev at yahoo.com  Fri Feb 11 06:02:09 2005
From: efrat_regev at yahoo.com (Efrat Regev)
Date: Fri, 11 Feb 2005 05:02:09 -0600
Subject: Python in Makefile Question
Message-ID: <MK-dnXqPBfzkHZHfRVn-qw@adelphia.com>

    Hello,

    I'd like to ask a question concerning a python script in a makefile.
Suppose I have a C++ project (sorry for raising this in a Python newsgroup),
with some makefile for it. Before compiling the code, I'd like to check that
there are no C++ convention violations (e.g., identifiers beginning with an
underscore). So my makefile looks something like this:

target: ...
    verify.py
    $(CC) ...

verify.py is a python script that checks for convention violations, i.e.,
its first line is

#! /usr/bin/env python

I can't figure out the following:
1. How can I get the python script to return a value to make, so that if it
decides that there are convention violations make will fail?
2. How can I pass information from the makefile to the python script, e.g.,
the base directory to check?

    Thanks,

    Efrat





From daniel at bowettsolutions.com  Wed Feb 16 06:18:26 2005
From: daniel at bowettsolutions.com (Daniel Bowett)
Date: Wed, 16 Feb 2005 11:18:26 +0000
Subject: [newbie]How to install python under DOS and is there any
 Wxpython can be installed under dos?
In-Reply-To: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
References: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
Message-ID: <cuvae0$lvv$1@sea.gmane.org>

john san wrote:
> How to install python under DOS and is there any Wxpython-like can be
> installed under dos?
> 
> Thanks.
> 
> 

Are you actually still running a pure DOS machine? Or are you running 
the dos prompt through Windows?



From john at grulic.org.ar  Thu Feb 17 03:35:11 2005
From: john at grulic.org.ar (John Lenton)
Date: Thu, 17 Feb 2005 05:35:11 -0300
Subject: low-end persistence strategies?
In-Reply-To: <1108622622.119311.43200@f14g2000cwb.googlegroups.com>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<mailman.2735.1108616299.22381.python-list@python.org>
	<1108622622.119311.43200@f14g2000cwb.googlegroups.com>
Message-ID: <20050217083511.GC12437@grulic.org.ar>

On Wed, Feb 16, 2005 at 10:43:42PM -0800, Michele Simionato wrote:
> <snip simple example with flock>
> 
> What happens if for any reason the application crashes?
> Locked files will stay locked or not? And if yes, how do I
> unlock them?

the operating system cleans up the lock.

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
Linux ext2fs has been stable for a long time, now it's time to break it
	-- Linuxkongre? '95 in Berlin
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From tzot at sil-tec.gr  Thu Feb 10 18:17:07 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Fri, 11 Feb 2005 01:17:07 +0200
Subject: Pioneers of WIMPishness (was: A great Alan Kay quote)
References: <420a5c1e$0$21630$a1866201@visi.com>
	<420a6491$0$29509$a1866201@visi.com>
	<mailman.2270.1107980587.22381.python-list@python.org>
	<420ab9c9$1@nntp0.pdx.net> <c6vqd2-bqv.ln1@lairds.us>
Message-ID: <8kqn0155lubkfmj38829051dvnu97pcb91@4ax.com>

On Thu, 10 Feb 2005 03:08:11 GMT, rumours say that claird at lairds.us (Cameron
Laird) might have written:

[more snipping]

>With a little provocation, I can push the ideas of "mechanical"
>or "machine" referencing back at least to the Enlightenment, and
>arguably much farther.

Please ignore my earlier post, since it was mistakenly sent incomplete.

about "arguably much farther":

http://www.ancient-mysteries.com/greece2000/Main/Main2/Main3/Anti-Main/anti-main.html

and

http://www.smith.edu/hsc/museum/ancient_inventions/battery2.html

and

http://www.smith.edu/hsc/museum/ancient_inventions/steamengine2.html


Nice page, this:

http://www.smith.edu/hsc/museum/ancient_inventions/hsclist.htm
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From elena at monmouth.com  Fri Feb 18 15:44:23 2005
From: elena at monmouth.com (elena at monmouth.com)
Date: 18 Feb 2005 12:44:23 -0800
Subject: Help with research
References: <1108684307.612656.92010@c13g2000cwb.googlegroups.com>
	<pan.2005.02.18.00.09.44.250691@jerf.org>
	<mailman.2805.1108745579.22381.python-list@python.org>
Message-ID: <1108759463.702994.260360@z14g2000cwz.googlegroups.com>

Thanks for input. You're right. Programmers would probably look for the
abolute value of an answer. That's one reason why people sometimes get
annoyed with us (I guess I'm thinking of the product managers I've
worked with). In any case, this is an existing instrument and was not
developed specifically for programmers. I will be very careful. But I
will be using it to compare groups of progammers, so the results should
have some value.

I know I promised not to discuss, but I couldn't resist. I like
discussing our culture.

Elena



From jlargentaye at gmail.com  Tue Feb  8 06:10:23 2005
From: jlargentaye at gmail.com (Jean  de Largentaye)
Date: 8 Feb 2005 03:10:23 -0800
Subject: Choosing the right parser for parsing C headers
Message-ID: <1107861023.254610.14310@g14g2000cwa.googlegroups.com>

Hi,

I need to parse a subset of C (a header file), and generate some unit
tests for the functions listed in it. I thus need to parse the code,
then rewrite function calls with wrong parameters. What I call "shaking
the broken tree" :)
I chose to make my UT-generator in Python 2.4. However, I am now
encountering problems in choosing the right parser for the job. I
struggle in choosing between the inappropriate, the out-of-date, the
alpha, or the too-big-for-the task...

So far I've indentified 9(!) potential candidates (Mostly taken from
the http://www.python.org/moin/LanguageParsing page) :

- Plex:
Only a lexical analyser as far as I understand. Kinda RE++, no syntax
processing
- ply:
Lex / Yacc for python! Tackle the Beast! Syntax processing looks
complex..
- Pyggy:
Lex / Yacc -styled too. More recent, but will a 0.4 version be good
enough?
- PyLR:
fast parser with core functions in C... hasn't moved since '97
- Pyparsing:
quick and easy parser... but I don't think it does more than lexical
analysis
- spark:
Here's some wood. Now build your house.
- yapps2 :
yapps2+ (I hesitate to call it yapps3):
chosen by http://www.python.org/sigs/parser-sig/towards-standard.html.
Is the choice up-to-date?
But will it do for parsing C?
- TPG (Toy Parser Generator):
looks cool
- ANTLR (latest version from Jan 28 produces Python code) :
Seems powerful and has a lot of support, but I don't want to have to
use an exterior Java tool. Furthermore, does it let me control what
happens at each stage easily, or does it just make me a compiler?

I've omitted these: shlex, kwparsing (webpage?), PyBison, Trap
(webpage?), DParser, and SimpleParse (I don't want the extra
dependancy).

I was hoping for a quick and easy choice, but got caught in the tar pit
of Too Much Information. Parsing is a large and complex field. As an
added handicap, I'm new to the dark minefield of parsers... I've had
some experience with Lex/Yacc, and have some knowledge of parser
theory, through a course on compilators. I am thus used to EBNF-style
grammar.
I was disappointed to see that Parser-SIG has died out.
Would you have any ideas on which parser is best suited for the task?

John



From vibroverb at hotmail.com  Thu Feb 24 00:13:02 2005
From: vibroverb at hotmail.com (Deltones)
Date: 23 Feb 2005 21:13:02 -0800
Subject: Pythoncard - Mistake in walkthrough?
References: <e0f0f902.0502230849.3441e26a@posting.google.com>
	<rq5Td.6562$OU1.2627@newssvr21.news.prodigy.com>
Message-ID: <e0f0f902.0502232113.2711a809@posting.google.com>

> As stated in the on-line WalkThrough, the information there was written for
> an older version of the program.
> 
<snipped for brevity>

Hi,

I understand, but the walkthrough I'm doing comes from the doc folder
of the latest windows package. I thought that the walkthrough were
updated to fit the newest version. Thanks though.

Denis


From fredrik at pythonware.com  Mon Feb  7 13:47:17 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 7 Feb 2005 19:47:17 +0100
Subject: Confused with methods
References: <mailman.2022.1107703890.22381.python-list@python.org><TL-dneoHycPA35vfRVn-qQ@rogers.com><mailman.2027.1107713399.22381.python-list@python.org><1grl578.1rmaukw1yyw0g4N%aleaxit@yahoo.com><mailman.2059.1107774429.22381.python-list@python.org><36p3aaF4tdk23U1@individual.net>
	<42080681.7050201@freemail.gr>
Message-ID: <cu8d0n$79p$1@sea.gmane.org>

"jfj" <jfj at freemail.gr> wrote:

>> u = DoSomethingWithCallback(A().callback)
>   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> Oops!!!
> I think it would be more obvious to somebody who doesn't know
> the python internals, to say:
>  # take the callback from A and install it to DSWC
>  u=DoSomethingWithCallback( A.callback)

that's not the same thing.

>  u=DoSomethingWithCallback (A().callback.im_func)

that's not the same thing.

>  u=DoSomethingWithCallback (A().im_class.callback)

that's not the same thing.

if you cannot tell the difference between a class and an instance, you should
spend more time learning how Python works, and less time telling everyone
how things can be made more "obvious".

</F> 





From Peter.Vandersteegen at gmail.com  Wed Feb 16 11:58:34 2005
From: Peter.Vandersteegen at gmail.com (peter)
Date: 16 Feb 2005 08:58:34 -0800
Subject: renaming 'references' to functions can give recursive problems
References: <1108565645.179340.70600@o13g2000cwo.googlegroups.com>
	<slrnd16pt6.enl.apardon@rcpc42.vub.ac.be>
Message-ID: <1108573114.574794.201470@g14g2000cwa.googlegroups.com>

Hello, nice solution:
but it puzzles me :)

can anyone tell me why
-----------correct solution----------------
def fA(input):
  return input

def newFA(input, f= fA):
   return f(input)

fA = newFA

is correct and:
-------------infinite loop-----------------

def fA(input):
  return input

def newFA(input):
   return fA(input)

fA = newFA

gives an infinite recursive loop?

kind regards

Peter

Antoon Pardon wrote:
> Op 2005-02-16, peter schreef <Peter.Vandersteegen at gmail.com>:
> > Hello all,
> >
> > Recently I've started to refactor my code ...(I'm using python
2.3.4)
> > I tried to add extra functionality to old functions
non-intrusively.
> > When I used a construct, which involves renaming functions etc... I
> > came across some recursive problems.  (a basic construct can be
found
> > under the section BASIC CODE)
> >
> > These problems do not occur when renaming objects.  (see section
EXTRA
> > CODE)
> > My question now is:
> > I do not know the underlying idea of functions.  Is this the way
they
> > should behave? Or should they work the same way as objects do?
> > (My preferences goes to this last option)
> >
> > BASIC CODE:
> >
---------------------------------------------------------------------------
> > def fA(input): # starting point: function named fA
> >     return input
> >
> > def newFA(input): # new function with added functionality
> >     #does something extra with a!
> >     return fA(input)
> > fA = newFA
> >      # this should allow to add functionality without
> >      # breaking older code which uses the name fA!
> > fA() # execute fA()
>
> Try this:
>
> def fA(input):
>   return input
>
>
> def newFA(input, f= fA):
>   return f(input)
> 
> fA = newFA
> 
> -- 
> Antoon Pardon



From g.brandl-2005-01 at gmx.net  Sat Feb  5 14:03:32 2005
From: g.brandl-2005-01 at gmx.net (Georg Brandl)
Date: Sat, 05 Feb 2005 20:03:32 +0100
Subject: Alternative to standard C "for"
In-Reply-To: <mailman.1984.1107629393.22381.python-list@python.org>
References: <1107628331.816935.16760@o13g2000cwo.googlegroups.com>
	<mailman.1984.1107629393.22381.python-list@python.org>
Message-ID: <36kjjqF52sv7lU1@individual.net>

BJ?rn Lindqvist wrote:
>> I am quite new to Python, and have a straight & simple question.
>> In C, there is for (init; cond; advance). We all know that.
>> In Python there are two ways to loop over i=A..B (numerical.):
>> 1) i = A
>>    while i<B:
>>       ...do something...
>>       i+=STEP
> 
> This is indeed quite ugly. You rarely need such loops in Python and
> with some thinking you can often translate the C-equivalent to
> something more pythonic. As you guessed, your second problem is best
> solved with a generator function - xrange(). It is completely equal to
> range() except that it returns a generator instead of a list.

Slight terminology glitch -- it does return an iterator, not a
generator. Generators are functions that return iterators.

regards,
Georg


From petite.abeille at gmail.com  Thu Feb 10 12:20:07 2005
From: petite.abeille at gmail.com (PA)
Date: Thu, 10 Feb 2005 18:20:07 +0100
Subject: XDR? (was Re: is there a safe marshaler?)
In-Reply-To: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
Message-ID: <085206ea1fd7b273b5681472edafc457@gmail.com>


On Feb 10, 2005, at 15:01, Irmen de Jong wrote:

> Is xdrlib the only option?
> I would expect that it is fast and safe because
> it (the xdr spec) has been around for so long.

XDR? Like Sun's "XDR: External Data Representation standard"?

http://www.faqs.org/rfcs/rfc1014.html
http://www.faqs.org/rfcs/rfc1832.html

How does XDR copes with Unicode these days?

Alternatively, perhaps there is a ASN.1 DER library in python?

http://asn1.elibel.tm.fr/en/standards/index.htm

Cheers

--
PA, Onnay Equitursay
http://alt.textdrive.com/



From steven.bethard at gmail.com  Mon Feb  7 00:34:15 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 06 Feb 2005 22:34:15 -0700
Subject: remove duplicates from list *preserving order*
In-Reply-To: <1107737601.781459.279200@o13g2000cwo.googlegroups.com>
References: <BfmdnTjWquaJEZ_fRVn-3A@comcast.com>
	<mailman.2030.1107719436.22381.python-list@python.org>
	<1107737601.781459.279200@o13g2000cwo.googlegroups.com>
Message-ID: <9rmdnVd1lr9MYJvfRVn-gg@comcast.com>

John Machin wrote:
> So, just to remove ambiguity, WHICH one of the bunch should be
> retained? Short answer: "the first seen" is what the proverbial "man in
> the street" would expect

For my purposes, it doesn't matter which instance is retained and which 
are removed, so yes, retaining the first one is quite acceptable.  (That 
was also the simplest thing to do, so that's why all my solutions did that.)

Steve


From jeremy+plusnews at jeremysanders.net  Fri Feb 25 11:44:45 2005
From: jeremy+plusnews at jeremysanders.net (Jeremy Sanders)
Date: Fri, 25 Feb 2005 16:44:45 +0000
Subject: Splitting strings - by iterators?
References: <pan.2005.02.25.15.55.31.77881@jeremysanders.net>
	<38913oF5mi8arU2@individual.net>
Message-ID: <pan.2005.02.25.16.44.45.546125@jeremysanders.net>

On Fri, 25 Feb 2005 17:14:24 +0100, Diez B. Roggisch wrote:

> Maybe [c]StringIO can be of help. I don't know if it's iterator is lazy. But
> at least it has one, so you can try and see if it improves performance :)

Excellent! I somehow missed that module. StringIO speeds up the iteration
by a factor of 20!

Thanks

Jeremy


From fredrik at pythonware.com  Thu Feb 17 03:32:07 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 17 Feb 2005 09:32:07 +0100
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net><qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com><37hqlrF59l2b2U1@individual.net><873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<421450CC.9080504@swiftdsl.com.au>
Message-ID: <cv1kkc$kav$1@sea.gmane.org>

"news.sydney.pipenetworks.com" wrote:

>> Nick "Explicit is better than Implicit"
>
> Really ? Then why are you using python. Python or most dynamic languages are are so great because 
> of their common sense towards the "implicit". You must have heard of "never say never" but "never 
> say always" (as in "always better") is more appropriate here. There are many cases of python's 
> implicitness.

a certain "princess bride" quote would fit here, I think.

> What about
>
> a = "string"
> b = 2
> c = "%s%s" % (a, b)
>
> There is an implicit str(b) here.

nope.   it's explicit: %s means "convert using str()".

from the documentation:

          %s     String (converts any python object using str()).


> ''.join(["string", 2]) to me is no different then the example above.

so where's the "%s" in your second example?

</F> 





From steve at holdenweb.com  Thu Feb  3 13:24:23 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 03 Feb 2005 13:24:23 -0500
Subject: Easy Q: dealing with object type
In-Reply-To: <42026b7e$1@nntp.zianet.com>
References: <420181b1$1@nntp.zianet.com>
	<1107396669.028096.301290@g14g2000cwa.googlegroups.com>
	<42019545$1@nntp.zianet.com> <SJmdnddykYoAOpzfRVn-hA@comcast.com>
	<just-A7B5B3.12500903022005@news1.news.xs4all.nl>
	<42026b7e$1@nntp.zianet.com>
Message-ID: <D4uMd.102706$Jk5.84177@lakeread01>

Erik Johnson wrote:
>> Steven Bethard <steven.bethard at gmail.com> wrote:
>>
>>>py> class A:
>>>...     pass
>>>...
>>>py> class B:
>>>...     pass
>>>...
>>>py> a = A()
>>>py> a.__class__ == A
>>>True
>>>py> a.__class__ == B
>>>False
> 
> 
>  "Just" <just at xs4all.nl> wrote
> 
>>Uh, isinstance(a, A) works for both new-style and old-style classes.
>>Heck, isinstance() even works in Python 1.5.2...
> 
> 
>     Oh, there! Not that there is anything wrong with new classes, but that
> is just the sort of thing that I expected to find. No, neither of these is
> bad at all. I was looking for something like the obj.__class__ attribute,
> but I couldn't see it under dir(obj). So, why is _class__ magically tucked
> away where you can't see it? That doesn't seem very "Pythonic".
> 
>     I also looked in my two python books for instance(), or instanceof()
> functions - wasn't seeing anything. Actually, now that I check the indices
> of  "Learning Python" 1E & "Programming Python" 2E, I don't see isinstance()
> either.  How unfortunate. :(
> 
Unfortunate but, given that this "introspection" is normally considered 
to be a fairly advanced language feature, hardly surprising.

>     As an aside, I notice a lot of other people's interpreters actually
> print 'True' or 'False' where my system prints 0 or 1. Is that a
> configuration that can easily set somewhere?
> 
Nope, it's a version thing. I believe Booleans were introduced at some 
odd point like 2.2.1. Until then "True" and "False" were just names like 
any other.

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From steven.bethard at gmail.com  Thu Feb  3 13:00:36 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 03 Feb 2005 11:00:36 -0700
Subject: Computing class variable on demand?
In-Reply-To: <1107445682.239962.284660@o13g2000cwo.googlegroups.com>
References: <1107410898.260491.203090@l41g2000cwc.googlegroups.com>
	<6eydnSAjiuofW5zfRVn-sw@comcast.com>
	<1107445682.239962.284660@o13g2000cwo.googlegroups.com>
Message-ID: <mY2dnU6Tjq1e-5_fRVn-hg@comcast.com>

fortepianissimo wrote:
> This seems to be what I need. My use case is to do lengthy
> intialization as late as possible. In this case this is to initialize
> class variables. Does this make sense?

Yup.  If they definitely have to be class variables, then yeah, you 
probably need to use a metaclass.  If you're looking for late 
initialization, Scott David Daniels has a nice descriptor recipe for this:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/363602

Probably this is a better call than using __getattr__.  With it, your 
code might look like[1]:

py> class LazyAttribute(object):
...     def __init__(self, calculate_function):
...         self._calculate = calculate_function
...     def __get__(self, obj, _=None):
...         if obj is None:
...             return self
...         value = self._calculate(obj)
...         setattr(obj, self._calculate.func_name, value)
...         return value
...
py> class Foo(object):
...     class __metaclass__(type):
...         @LazyAttribute
...         def bar(self):
...             print 'slow initialization'
...             return 'apple'
...
py> Foo.bar
slow initialization
'apple'
py> Foo.bar
'apple'

That way, you define all the attributes that need to be lazily 
initialized in the __metaclass__ class.  If all your classes will have 
the same lazily initialized attributes, you could also write this like:

py> class BarType(type):
...     @LazyAttribute
...     def bar(self):
...         print 'slow initialization'
...         return 'apple'
...
py> class Foo(object):
...     __metaclass__ = BarType
...
py> class Baz(object):
...     __metaclass__ = BarType
...
py> Foo.bar
slow initialization
'apple'
py> Foo.bar
'apple'
py> Baz.bar
slow initialization
'apple'
py> Baz.bar
'apple'

But I suspect the former is what you want...

Steve

[1] If you're using Python < 2.4, you'll have to make the decorator call 
manually, e.g.

     def bar(self):
        ...
     bar = LazyAttribute(bar)


From mhartl at post.harvard.edu  Mon Feb 28 17:12:33 2005
From: mhartl at post.harvard.edu (Michael Hartl)
Date: 28 Feb 2005 14:12:33 -0800
Subject: Calling external text-files (newb)
In-Reply-To: <mailman.3154.1109628053.22381.python-list@python.org>
References: <mailman.3154.1109628053.22381.python-list@python.org>
Message-ID: <1109628753.490163.30720@l41g2000cwc.googlegroups.com>

There are two problems: (1) by quoting 'source', you refer to a string
literal, not the variable you defined via raw_input; (2) you have not
defined the variable 'input', so there's no way to call the 'read'
method on it.

Try this instead:

source_path = raw_input('file path: ')
s = open(source_path).read()
print s

The default behavior of 'open' includes 'r' implicitly.

You can also use the function 'file', which is a synonym for 'open':

s = file(source).read()

Be warned that using the same syntax when writing files is dangerous;
in that case you should create a file object and explicitly close it.

f = file('a_copy', 'w')
f.write(s)
f.close()

HTH,

Michael

--
Michael D. Hartl, Ph.D.
CTO, Quark Sports LLC
http://quarksports.com/



From bdesth.quelquechose at free.quelquepart.fr  Sat Feb  5 09:58:38 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 05 Feb 2005 15:58:38 +0100
Subject: Error!
In-Reply-To: <BB3Nd.103625$Jk5.20748@lakeread01>
References: <614c778e.0502041459.39da55c1@posting.google.com>
	<1107563070.861085.180680@g14g2000cwa.googlegroups.com>
	<614c778e.0502050402.4c6f46eb@posting.google.com>
	<BB3Nd.103625$Jk5.20748@lakeread01>
Message-ID: <4204dcdc$0$14112$626a14ce@news.free.fr>

Steve Holden a ?crit :
(snip)
> So, for example, your program might look like this:
> 
> base_price = int(raw_input(...))
> tax_rate = int(raw_input(...)
> tax_amount = base_price * ((100+tax_amount)/...)
s/(100+tax_amount)/(100 + tax_rate)/, I guess ?


From grante at visi.com  Tue Feb  1 12:59:22 2005
From: grante at visi.com (Grant Edwards)
Date: 01 Feb 2005 17:59:22 GMT
Subject: Where are list methods documented?
References: <41ffba7d$0$15879$a1866201@visi.com>
	<mailman.1702.1107279469.22381.python-list@python.org>
Message-ID: <41ffc37a$0$15874$a1866201@visi.com>

On 2005-02-01, Tim Peters <tim.peters at gmail.com> wrote:
> [Grant Edwards]
>> I'm trying to figure out how to sort a list, and I've run into
>> a problem that that I have tripped over constantly for years:
>> where are the methods of basic types documented?
>
> The methods on mutable sequence types are documented in the
> Library manual's section on mutable sequence types:
>
>     http://docs.python.org/lib/typesseq-mutable.html

> You could have found the above by, e.g., looking up "sort" in the
> Library manual's index.

I did.  I looked up sort in the library index, and it took me
to 3.3.5 Emulating container types, which said:

   Mutable sequences should provide methods append(), count(),
   index(), extend(), insert(), pop(), remove(), reverse() and
   sort(), like Python standard list objects.

I also looked at quite a few "list" links in the index.

I don't think it's at all obvious that the documentation for
list.sort would be under "mutable sequence object".
   
-- 
Grant Edwards                   grante             Yow!  YOW!! Everybody out
                                  at               of the GENETIC POOL!
                               visi.com            


From Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org  Tue Feb  8 05:11:28 2005
From: Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org (Alexander)
Date: Tue, 08 Feb 2005 13:11:28 +0300
Subject: variable declaration
References: <cu2l5t$cf9$01$1@news.t-online.com>
Message-ID: <MSGID_2=3A5025=2F3.131_4208c092@fidonet.org>

Hi, Peter!

05 feb 2005 at 15:28, Peter Otten wrote:

 >> variable names. You have to move the code into a function, though: $
 >> cat epsilon.py ...skipped... $ pychecker epsilon.py epsilon.py:6:
 >> Local variable (epselon) not used Well, I can change it a little to
 >> pass this check. Just add "print epselon" line.

 PO> You are now on a slippery slope. I'd rather think of ways to write my
 PO> code in a way for it to succeed or at least fail in an obvious way.
Ok, fixed.
 PO> I don't consider a scenario likely where you both misspell a name
 PO> nearly as often as you write it correctly, and do that in a situation
 PO> where the program enters an infinite loop instead of just complaining
 PO> with an exception, which is by far the most likely reaction to a
 PO> misspelt name.
Let say, you have variable or class field 'PowerOfGenerator', or 'lambda_k'.
You decide to rename it to 'ReactivePowerOfGenerator' or 'lambda_kx'. But, for
some reasons, you forget to do it everywhere, for example in function with
first lines like this:

  PowerOfGenerator=TakeFromSensor()
  if PowerOfGenerator>xxx:
    ....
  RecalcPower(PowerOfGenerator)
  PutToTheDatabase(PowerOfGenerator)
  ....
Here, python will not help you. The worst thing is that in such calculations
you often receive plausible results.

Another example. Let say you have variable PowerOfGenerator in your program.
But, it is only active power, so you have to (1)rename PowerOfGenerator to
ActivePowerOfGenerator, (2)calculate ReactivePowerOfGenerator, and (3)calculate
new PowerOfGenerator by formula
  PowerOfGenerator=sqrt(ReactivePowerOfGenerator**2+ActivePowerOfGenerator**2)
With var declarations, on step (1) you just rename PowerOfGenerator to
ActivePowerOfGenerator in the place of its declaration, and compile your
program. Compiler will show you all places where you have to rename variables.
After it, on step (3) you can safely and peacefully add new PowerOfGenerator
variable.

Of course, I am trying to use more short variable names, but its just an
example.

 PO> Code not written is always errorfree, and in that spirit I'd rather
 PO> strive to write the function more concisely as

 PO> def loop2():
 PO>     s = 0
 PO>     for delta in range(10):
 PO>         s += delta
 PO>         print s

 PO> This illustrates another problem with your approach: would you have
 PO> to declare globals/builtins like range(), too?
if I understand you right, it can be done this way (with '~' instead of 'var'):
  ~s=0
  for ~delta in range(10)
    s+=delta

[skip]

 PO> I suggested pychecker more as a psychological bridge while you gain
 PO> trust in the Python way of ensuring reliable programs, i. e. writing
 PO> small and readable functions/classes that do one thing well and can
 PO> easily be tested. Administrative overhead -- as well as excessive
 PO> comments -- only serve to bury what is actually going on.

Your explanation is most "non-religious" in comparison with all others I see in
this newsgroup. Thank you, now I see that lack of var declarations is not
stupid oversight, but it may have reasons.
>From the other side, I still think that optional var declaration is good idea,
for example in functions which are big and operate with tens of variables,
non-decomposable by their nature. Such functions occurs in some domains. And,
in situations like above.

 PO> I guess that means no, not a good idea.

 PO> On the other hand, taking all names used in a function and looking
 PO> for similar ones, e. g. by calculating the Levenshtein distance,
 PO> might be worthwhile...

Hmm, what is the Levenshtein distance between 'x1' and 'x2'? Or between kappa_i
and kappa_j? :)

Alexander, zatv at bk.ru


From idadesub at gmail.com  Wed Feb  2 21:02:25 2005
From: idadesub at gmail.com (Erick)
Date: 2 Feb 2005 18:02:25 -0800
Subject: streaming a file object through re.finditer
Message-ID: <1107396145.400036.271010@g14g2000cwa.googlegroups.com>

Hello,

I've been looking for a while for an answer, but so far I haven't been
able to turn anything up yet. Basically, what I'd like to do is to use
re.finditer to search a large file (or a file stream), but I haven't
figured out how to get finditer to work without loading the entire file
into memory, or just reading one line at a time (or more complicated
buffering).

For example, say I do this:
cat a b c > blah

Then run this python script:
>>> import re
>>> for m in re.finditer('\w+', buffer(file('blah'))):
...   print m.group()
...
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: buffer object expected

Of course, this works fine, but it loads the file completely into
memory (right?):
>>> for m in re.finditer('\w+', buffer(file('blah').read())):
...   print m.group()
...
a
b
c

So, is there any way to do this?

Thanks,

-e



From theller at python.net  Fri Feb 18 15:43:52 2005
From: theller at python.net (Thomas Heller)
Date: Fri, 18 Feb 2005 21:43:52 +0100
Subject: unicode encoding usablilty problem
References: <opsmekm2ei6yt6e7@news.cisco.com>
	<42164d01$0$4676$9b622d9e@news.freenet.de>
Message-ID: <7jl5zjhz.fsf@python.net>

=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?= <martin at v.loewis.de> writes:

> Eventually, the primary string type should be the Unicode
> string. If you are curious how far we are still off that goal,
> just try running your program with the -U option.

Not very far - can't even call functions ;-)

c:\>py -U
Python 2.5a0 (#60, Dec 29 2004, 11:27:13) [MSC v.1310 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> def f(**kw):
...   pass
...
>>> f(**{"a": 0})
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: f() keywords must be strings
>>>

Thomas


From dontwant at spam.com  Mon Feb  7 20:44:59 2005
From: dontwant at spam.com (Courageous)
Date: Mon, 07 Feb 2005 17:44:59 -0800
Subject: Big development in the GUI realm
References: <mailman.2123.1107820051.22381.python-list@python.org>
	<4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com>
Message-ID: <a96g01trlndjpl6udigjhegq3h8da9k263@4ax.com>


>If dynamic, then, it doesn't make sense that an EXE that builds on Qt
>should also be GPLed.

I'm hoping you're referring to the owners choice of license. For example,
if someone, owning rights to a thing that was a dynamic library, decided
to have a license akin to the GPL, it would easily qualify. It's a question
of /distribution/. If you copy parts of the work, and redestribute those
copies, you are caught by the rule of law. After that the license is a
matter of reduction to practice.

C//



From jeff at ccvcorp.com  Tue Feb 15 17:24:50 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Tue, 15 Feb 2005 14:24:50 -0800
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cutld5$30s$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>	<cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr>	<cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr>	<cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr>	<37bkemF5a7s7vU1@individual.net>
	<cut6nh$rpk$1@usenet.otenet.gr>	<86ll9piuj8.fsf@guru.mired.org>
	<cutf1h$576$1@usenet.otenet.gr>	<mailman.2643.1108495246.22381.python-list@python.org>	<cutibq$j8e$1@usenet.otenet.gr>
	<mailman.2647.1108497874.22381.python-list@python.org>
	<cutld5$30s$1@usenet.otenet.gr>
Message-ID: <1114tjagfelgrd9@corp.supernews.com>

Ilias Lazaridis wrote:

> Adam DePrince wrote:
> [...]
>> You're on it.  You drive a car?  You have to treat it right to get what
>> you want, right?  Same here.  Ask correctly, and you will get your
>> answers.  
> 
> Your interpretation/definition of "asking correctly" is irrelevant to me.


"Interpretation is irrelevant.  Logic is irrelevant.  You will be 
assimilated."

Jeff Shannon
Technician/Programmer
Credit International



From mahs at telcopartners.com  Mon Feb  7 20:33:29 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Mon, 07 Feb 2005 17:33:29 -0800
Subject: empty classes as c structs?
In-Reply-To: <XYqdnb9bj4sVJZrfRVn-vw@comcast.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<7rSdne7BcbDeV57fRVn-jg@comcast.com>	<mailman.1963.1107594941.22381.python-list@python.org>	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>	<mailman.1973.1107618702.22381.python-list@python.org>	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>	<mailman.2006.1107658273.22381.python-list@python.org>	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>	<mailman.2049.1107750700.22381.python-list@python.org>	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com>	<4207606E.4040806@iinet.net.au>	<mailman.2094.1107800398.22381.python-list@python.org>
	<XYqdnb9bj4sVJZrfRVn-vw@comcast.com>
Message-ID: <cu94ld$fau$1@sea.gmane.org>

Steven Bethard wrote:

> Do you mean there should be a separate Namespace and Bunch class?  Or do 
> you mean that an implementation with only a single method is less useful?

The former.
> 
> If the former, then you either have to repeat the methods __repr__, 
> __eq__ and update for both Namespace and Bunch, or one of Namespace and 
> Bunch can't be __repr__'d, __eq__'d or updated.

I see no problem in repeating the methods, or inheriting the implementation. 
However, if namespace and bunch are actually different concepts (one with 
reference semantics, the other with copy), then __repr__ at least would need to 
be specialized, to highlight the difference.

So, on balance, if copy semantics are important to bunch uses, and references 
for namespace (though Nick changed his mind on this, and I don't yet know why) I 
think they would be better as two small implementations.  I remain unsure about 
why you need or want copying, aside from matching the behavior of the builtins.

> 
> If the latter (setting aside the fact that the implementation provides 4 
> methods, not 1), I would argue that even if an implementation is only 
> one method, if enough users are currently writing their own version, 
> adding such an implementation to the stdlib is still a net benefit.

Yes, I agree with this: I was not picking on the class size ;-)

...
> 
> Another way to avoid the problem is to use *args, like the current Bunch 
> implementation does:
> 
>     def update(*args, **kwargs):
>         """bunch.update([bunch|dict|seq,] **kwargs) -> None

Sure - nice trick to avoid shadowing self too

...
> Is it that much worse to require the following code:
> 
>     Namespace.update(namespace, obj.__dict__) 
> or:
>     namespace.udpate(obj.__dict__)
> 
> if you really want to update a Namespace object with the attributes of a 
> non-Namespace object?

No problem at all - just a question of what the class is optimized for, and 
making the interface as convenient as possible, given the use case.  I agree 
that for straight attribute access to a dictionary, your update interface is 
clearly superior.

> 
> For that matter, do you have a use-case for where this would be useful? 
>  I definitely see the view-of-a-dict example, but I don't see the 
> view-of-an-object example since an object already has dotted-attribute 
> style access...


Yes, I have various cases in mind relating to argument-passing, dispatching, 
interface-checking and class composition.  Here the class becomes useful if it 
grows some namespace-specific semantics.

For example, I could write something like:
namespace(obj1) >= namespace(obj2) to mean obj1 has at least the attributes of obj2

implemented like:

def __ge__(self, other):
     for attrname in other.__dict__.keys():
         if not attrname in self.__dict__:
             return False
     return True

I realize that interfaces may be addressed formally by a current PEP, but, even 
if they are, this "cheap and cheerful" approach appeals to me for duck-typing.


However, as I think more about this, I realize that I am stretching your concept 
past its breaking point, and that whatever the merits of this approach, it's not 
helping you with bunch.  Thanks for knocking the ideas around with me.

Cheers

Michael



From ncoghlan at iinet.net.au  Sat Feb 19 21:55:35 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 20 Feb 2005 12:55:35 +1000
Subject: global var
In-Reply-To: <cv3a9k$3eu$1@gemini.csx.cam.ac.uk>
References: <42152b84$0$15817$636a15ce@news.free.fr>
	<cv3a9k$3eu$1@gemini.csx.cam.ac.uk>
Message-ID: <4217FC27.5060808@iinet.net.au>

Michael Hoffman wrote:
> raver2046 wrote:
> 
>> How to have a global var in python ?
> 
> 
> "global var" will give you a global variable named "var".

Whether this advice is correct or not depends greatly on what the OP means by 
'global' :)

Module global, it's right, application global it's wrong. Given the nature of 
the question, I suspect the latter.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From sjmachin at lexicon.net  Mon Feb 21 17:46:28 2005
From: sjmachin at lexicon.net (John Machin)
Date: 21 Feb 2005 14:46:28 -0800
Subject: intersection of 2 list of pairs
In-Reply-To: <4219d31b$0$17249$8fcfb975@news.wanadoo.fr>
References: <1108920276.253388.23590@f14g2000cwb.googlegroups.com>
	<4219d31b$0$17249$8fcfb975@news.wanadoo.fr>
Message-ID: <1109025988.849629.318130@z14g2000cwz.googlegroups.com>


Pierre Quentel wrote:
> Another method is to build two sets of sets, one for E1 and one for
E2,
> then make the intersection of these sets
>
> - with Python 2.3
>
>  >>> E1=[('a','g'),('r','s')]
>  >>> E2=[('g','a'),('r','q'),('f','h')]
>  >>> from sets import Set,ImmutableSet
>  >>> f=Set([ImmutableSet(s) for s in E1])& Set([ImmutableSet(s) for s
in
> E2])
>  >>> [tuple(x) for x in f]
> [('a', 'g')]
>
> - with Python 2.4
>
>  >>> E1=[('a','g'),('r','s')]
>  >>> E2=[('g','a'),('r','q'),('f','h')]
>  >>> f=set([frozenset(s) for s in E1]) & set([frozenset(s) for s in
E2])
>  >>> [tuple(x) for x in f]
> [('a', 'g')]
>
> You must use ImmutableSet or frozenset to be able to create a set of
sets
>
> Pierre

The problem with using frozenset([x,y)) -- as compared to
(min(x,y),max(x,y))-- is that you don't get an *understandable*
canonical representation of the pair:

>>> frozenset(('a','b'))
frozenset(['a', 'b'])
>>> frozenset(('b','c'))
frozenset(['c', 'b'])

i.e. it depends on the Python hash function for the type/class being
used. Try explaining that to the first person you meet at the bus stop.
Exceptions prove the rule: if the OP regularly caught the same bus as
the timbot he wouldn't be asking questions like this :-)

In any case the OP still has a problem; when ('a','g') -- or ('g', 'a')
--pops out as the answer, he still doesn't know which list(s) the
duplicates are in, nor which way they are represented. To do something
useful, the output would have to be a list of lists, with the inner
list representing a cluster of duplicates. Each duplicate would be
represented by a unique identifier -- such as a tuple: (list_number,
index_in_that_list) -- so that it can be retrieved, inspected,
jettisoned, ...



From steven.bethard at gmail.com  Wed Feb 16 17:14:31 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 16 Feb 2005 15:14:31 -0700
Subject: Using 'in' with a Dict
In-Reply-To: <1108590377.263790.196130@c13g2000cwb.googlegroups.com>
References: <1108590222.589358.7310@o13g2000cwo.googlegroups.com>
	<1108590377.263790.196130@c13g2000cwb.googlegroups.com>
Message-ID: <hcSdnWdMVchYWI7fRVn-3w@comcast.com>

kowboy wrote:
> I posted too quickly. A little performance testing told me that has_key
> is somewhat slower than "in". I used a large number of string keys in
> my test.

See my other post, but the reason has_key is slower is almost certainly 
that it has to do a LOAD_ATTR:

$ python -m timeit -s "m = dict.fromkeys(xrange(100, 200))" "[i in m for 
i in xrange(300)]"
10000 loops, best of 3: 102 usec per loop

$ python -m timeit -s "m = dict.fromkeys(xrange(100, 200)); 
has_key=m.has_key" "[has_key(i) for i in xrange(300)]"
10000 loops, best of 3: 107 usec per loop

For this data at least, the difference is negligible.  (I actually found 
has_key to be faster in some other datasets.)

STeVe


From jfj at freemail.gr  Mon Feb 21 20:50:08 2005
From: jfj at freemail.gr (jfj)
Date: Mon, 21 Feb 2005 17:50:08 -0800
Subject: lambda closure question
In-Reply-To: <1108985217.728665.252680@z14g2000cwz.googlegroups.com>
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
	<1108808502.699333.66520@g14g2000cwa.googlegroups.com>
	<mailman.2831.1108814832.22381.python-list@python.org>
	<1108903184.145726.223480@l41g2000cwc.googlegroups.com>
	<1108904798.377200.313970@g14g2000cwa.googlegroups.com>
	<mailman.2869.1108921769.22381.python-list@python.org>
	<1108985217.728665.252680@z14g2000cwz.googlegroups.com>
Message-ID: <421A8FD0.6090506@freemail.gr>

Carl Banks wrote:

> transformations gets rebound, so you'd need a reference to it.

That certainly is an application.  I guess it depends on one's
programming background.

I'd only use nested (function, class) definition to accomplish
such a feature:

########################
def genclass(x,y):
     class myclass:
         M = x
         def f(self, z):
             return self.M + y + z
     return myclass

A=genclass(1,2)
a=A()
#########################

where i would prefer python to expand this as a template to:

     class myclass:
         M = 1
         def f(self, z):
             return self.M + 2 + z
     A = myclass
     a = A()

IOW, I'd like nested (function, class) definitions to
be used *only* for dynamic code generation with runtime
constants, and OOP *forced* for other applications like
the fractal example:)

jf
---------------
# if you're dissatisfied with the situation on the planet
# slow down the circulation of money



From steensen101 at yahoo.com  Sun Feb 13 18:22:13 2005
From: steensen101 at yahoo.com (steen)
Date: 13 Feb 2005 15:22:13 -0800
Subject: win32 extension install hiccup
References: <cuoh3s$87u$1@lust.ihug.co.nz>
Message-ID: <1108336933.685715.108590@o13g2000cwo.googlegroups.com>


MM wrote:
> Hi,
>
> I downloaded the latest win32all build 202 and tried to install under

> win2000 with Py2.4. Install complains about 'couldn't open py2.4 to
run
> script pywin32-preinstall.py'. I checked the directories and there
was
> no sign of this file (preinstall.py) so I presume this is why it
bombed.
> How do I fix this? Thanks, matthew.

Build 202 is not the latest build. Build 203 is available at
Sourceforge http://sourceforge.net/projects/pywin32/



From john_sips_teaz at yahooz.com  Thu Feb 17 13:37:01 2005
From: john_sips_teaz at yahooz.com (John)
Date: Thu, 17 Feb 2005 13:37:01 -0500
Subject: difference between class methods and instance methods
In-Reply-To: <Xns9600AE4FC946duncanrcpcouk@127.0.0.1>
References: <pan.2005.02.17.07.04.37.907754@yahooz.com>
	<Xns96005FE3164DAduncanrcpcouk@127.0.0.1>
	<1119g2rre5g610c@corp.supernews.com>
	<37juh3F5d511mU1@individual.net>
	<Xns9600AE4FC946duncanrcpcouk@127.0.0.1>
Message-ID: <1119p2o72976500@corp.supernews.com>

Duncan Booth wrote:
> [snip]
> 
> Bound methods get created whenever you reference a method of an instance. 
> If you are calling the method then the bound method is destroyed as soon as 
> the call returns. You can have as many different bound methods created from 
> the same unbound method and the same instance as you want:
> 
> 
>inst = C()
>f1 = inst.foo
>f2 = inst.foo
>f1, f2
> 
> (<bound method C.foo of <__main__.C instance at 0x00B03F58>>, <bound method 
> C.foo of <__main__.C instance at 0x00B03F58>>)
> 

I just wanted to interject, although those two hex
numbers in the above line are the same, calling
id() on f1 and f2 produces two *different* numbers,
which agrees with the point you made.

>>>>f1 is f2
> 
> False
> 
>>>>f1 is inst.foo
> 
> False
> 
> 
> Every reference to inst.foo is a new bound method.



-- 
--- remove zees if replying via email ---


From jason at tishler.net  Wed Feb  2 08:30:05 2005
From: jason at tishler.net (Jason Tishler)
Date: Wed, 2 Feb 2005 08:30:05 -0500
Subject: Building Python with Tcl/Tk on Cygwin_NT-5.1
In-Reply-To: <4200D22D.9070000@llnl.gov>
References: <41FF5A67.3090606@llnl.gov> <20050201125129.GA432@tishler.net>
	<41FFA7C9.4070308@llnl.gov> <20050202124435.GA2472@tishler.net>
	<4200D056.4010000@llnl.gov> <4200D22D.9070000@llnl.gov>
Message-ID: <20050202133005.GE2472@tishler.net>

Dean,

Please keep your replies on-list.

On Wed, Feb 02, 2005 at 05:14:21AM -0800, Dean N. Williams wrote:
> I am trying to do the following according to your notes:
> 
> 3. Due to issues with Cygwin's fork() and DLL base address conflicts,
> one should rebase their Cygwin system to prevent fork() failures.  Use
> the following procedure to rebase your system:
> 
>    a. install the Cygwin rebase package (if necessary)
>    b. shutdown all Cygwin processes
>    c. start bash (do not use rxvt)
>    d. execute rebaseall (in the bash window)
> 
> I think this is why idle fails. So I did the above:
> 
> [Dean Williams at ippc ...ASD_work/bin]$ rebaseall
> ReBaseImage (/usr/bin/cygexpat-0.dll) failed with last error = 6
> 
> What am I doing wrong here?

It appears you did not follow step b above.  Did you shutdown *all*
Cygwin processes include services?

Jason

-- 
PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6


From markscottwright at gmail.com  Mon Feb 21 15:46:50 2005
From: markscottwright at gmail.com (markscottwright)
Date: 21 Feb 2005 12:46:50 -0800
Subject: iterative lambda construction
Message-ID: <1109018810.652908.93840@f14g2000cwb.googlegroups.com>

Just for the hell of it, I've been going through the old Scheme-based
textbook "Structure and Interpretation of Computer Programs" and seeing
what I can and can't do with python.  I'm trying to create a function
that returns the function (not the results of the function, but a
function object) that results from applying function f to it's (single)
argument N times.  For example, if you have "def sq(x): return x*x",
then repeated(sq, 2)(2) = 16, repeated(sq, 3)(2) = 256, etc.

I can do it recursively, like this:

def repeated(f, count):
   if count == 1:
       return f
   else:
       return lambda x: f(repeated(f, count - 1)(x)

But when I try to do it iteratively, it just hangs when I try to
evaluate the results (for count > 1):

def repeated2(f, count):
    newfun = f
    for i in range(count-1):
        newfun = lambda x: newfun(f(x))
    return newfun

For the life of me, I can't figure out why.  It seems like for count =
2, for example, the results from repeated2 should be lambda x: f(f(x)),
but it doesn't seem to be.



From gabriel.barros at gmail.com  Sat Feb 12 21:10:35 2005
From: gabriel.barros at gmail.com (Gabriel B.)
Date: Sun, 13 Feb 2005 00:10:35 -0200
Subject: Why Tk treat F10, F11, F12 diferently from F1...F9?
In-Reply-To: <20050213014425.GB24076@unpythonic.net>
References: <5175a81c05021216415204de93@mail.gmail.com>
	<20050213014425.GB24076@unpythonic.net>
Message-ID: <5175a81c05021218106824374b@mail.gmail.com>

On Sat, 12 Feb 2005 19:44:25 -0600, Jeff Epler <jepler at unpythonic.net> wrote:
> The reason that F10 does nothing is because there is already a binding
> on all for <F10>. [...]
> If you want to get rid of this binding, you would do it with something
> like
>     w.bind_all("<F10>", "")
> for some widget w.

That was it. thanks.

For the record: 
The virtual bidings with <<keys>> doesn't work. You have to manually
specify the <key>. Seems like a bugged behaviour to me. Or at least,
just very odd and intuitive.


> I don't know why you see the "L1" and "L2" keysyms.  I don't on my
> system (Fedora Core 2)

i'm on windowsXP (what makes the F10 biding by "default" even more
weird). Well, for now using the keysym_num will be more safe since i'm
still getting they correct.


From deetsNOSPAM at web.de  Tue Feb 22 08:58:47 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Tue, 22 Feb 2005 14:58:47 +0100
Subject: searching pdf files for certain info
References: <cvfdgg$fr0$1@solaris.cc.vt.edu>
Message-ID: <380s2cF5cn72lU1@individual.net>

rbt wrote:

> Not really a Python question... but here goes: Is there a way to read
> the content of a PDF file and decode it with Python? I'd like to read
> PDF's, decode them, and then search the data for certain strings.

There is a commercial tool pdflib availabla, that might help. It has  a free
evaluation version, and python bindings.

If it's only about text, maybe pdf2text helps.
-- 
Regards,

Diez B. Roggisch


From guettli at thomas-guettler.de  Fri Feb 18 03:35:30 2005
From: guettli at thomas-guettler.de (Thomas Guettler)
Date: Fri, 18 Feb 2005 09:35:30 +0100
Subject: how can i randomly choose keys in dictionary
References: <1108692826.040660.71750@g14g2000cwa.googlegroups.com>
Message-ID: <pan.2005.02.18.08.35.30.188839@thomas-guettler.de>

Am Thu, 17 Feb 2005 18:13:46 -0800 schrieb neutrinman:

> Hi,there. How can I choose a key in dictionary randomly?
> 
> Say, random.choice() in lists,
> 
> or in lists:
> lists = [1,2,3,4]
> position = random.range(len(lists))
> word = lists[position]

Hi, try this:

import random

mydict={1: "one", 2: "two"}
print mydict[random.choice(mydict.keys())]


-- 
Thomas G?ttler, http://www.thomas-guettler.de/




From raghulj at gmail.com  Tue Feb 22 02:40:12 2005
From: raghulj at gmail.com (Raghul)
Date: 21 Feb 2005 23:40:12 -0800
Subject: how can i read a mail using uid?
Message-ID: <1109058012.189388.302630@g14g2000cwa.googlegroups.com>

I want to read the content of the mail and split it words using uid.If
the word is found in my database I want to delete the mail using  its
uid.



From wittempj at hotmail.com  Mon Feb  7 05:00:46 2005
From: wittempj at hotmail.com (wittempj at hotmail.com)
Date: 7 Feb 2005 02:00:46 -0800
Subject: Dumb glob question
References: <Xns95F6E0341861PDuncesomewhereinval@204.153.244.156>
Message-ID: <1107770445.983406.64730@g14g2000cwa.googlegroups.com>

code like below willprint all files ending on 'par2', except tose not
containong 'vol' from the 5th position. is that what you need?
-import glob
-for nuke in glob.glob(r"""c:\temp\*.par2"""):
-    try:
-        nuke.index('vol', 5)
-        print nuke
-    except ValueError, e:
-        print e



From irmen.NOSPAM at xs4all.nl  Sun Feb  6 14:36:31 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sun, 06 Feb 2005 20:36:31 +0100
Subject: ANN: Frog 1.3 released (python 'blog' application)
In-Reply-To: <Xns95F3EE9DC44FEdevnulljoreybumpcom@199.45.49.11>
References: <41fcf53b$0$28986$e4fe514c@news.xs4all.nl>
	<Xns95F373835F61Ddevnulljoreybumpcom@199.45.49.11>
	<4203df05$0$28985$e4fe514c@news.xs4all.nl>
	<Xns95F3EE9DC44FEdevnulljoreybumpcom@199.45.49.11>
Message-ID: <420671ea$0$28994$e4fe514c@news.xs4all.nl>

Jorey Bump wrote:

> Thanks, I'm impressed. However, I feel as though the file manager should be 
> integrated with Frog in a such a way that it is enabled automatically for 
> users when they are created. The mkuser.py script felt a bit awkward, 
> especially when creating users was so easy in the administrative interface. 

I can only agree with this :)

> And once logged in, a user shouldn't need to authenticate to the file 
> manager separately. 

That is a feature that Snakelets (the web server) doesn't provide yet.
You can only be authenticated on a per-webapp basis.
It is on my to-do list to add a centralized login thing.

> I understand that the file manager was developed as a standalone webapp, 
> but the virtual user support is a big plus in Frog, and it would be great 
> to start uploading images to blogfiles/user/ right away.

Agreed, and I think it will be better integrated in a future version.
For now, you'll just have to login twice or hack your own centralized
logon thing ;-)

Have fun,

--Irmen de Jong


From siona at chiark.greenend.org.uk  Thu Feb 17 09:50:46 2005
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 17 Feb 2005 14:50:46 +0000 (GMT)
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<37hqlrF59l2b2U1@individual.net>
	<873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
Message-ID: <U-e*rVsHq@news.chiark.greenend.org.uk>

In article <873bvw9nqh.fsf at localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>,

!

Nick Vargish  <nav+posts at bandersnatch.org> wrote:
> If a non-string-type has managed to
>get into my list-of-strings, then something has gone wrong and I would
>like to know about this potential problem.

Thinking about where I use join(), I agree. If there's something
other than a string in my list, either I know about it and can
explicitly convert it ("Explicit is better than implicit.") or
it's an error, and "Errors should never pass silently."

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From greg at cosc.canterbury.ac.nz  Wed Feb  9 18:55:36 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Thu, 10 Feb 2005 12:55:36 +1300
Subject: turing machine in an LC
In-Reply-To: <pan.2005.02.08.12.47.00.135408@jerf.org>
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
	<87mzuf9gu8.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<s9zvf93ovp8.fsf@salmakis.intevation.de>
	<pan.2005.02.08.12.47.00.135408@jerf.org>
Message-ID: <36vm80F554hv7U1@individual.net>

Jeremy Bowers wrote:
> I can't figure out how to write a TM in a Python List Comprehension
> without one of either "variable binding" (so we can store the last symbol
> list and manipulate it in the next iteration) or "recursive function" (to
> express the whole tape as a recursive function), both of which require
> statements.

Lambdas can give you one-line functions, local variable
binding, if-then-else capabilities, and recursion. Everything
else should be possible from there.

As a fellow named Church once pointed out, lambdas are really
*all* you need in a language...

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From vibroverb at hotmail.com  Tue Feb 22 11:37:29 2005
From: vibroverb at hotmail.com (Deltones)
Date: 22 Feb 2005 08:37:29 -0800
Subject: Sizers VS window size
Message-ID: <e0f0f902.0502220837.16a22ead@posting.google.com>

Hi,

I'm trying to understand one of the wiki wxPython tutorial, and I must
admit I`m a bit baffled by sizers. If I run the following relevant
piece of code, I get the result I expect, i.e a 800x600 window being
opened (sorry for the formatting):

objFrame = MainWindow(None, -1, "Small Editor", (800, 600))

def __init__(self, parent, id, title, custom_size):
        wx.Frame.__init__(self, parent, wx.ID_ANY, title, size =
custom_size,
                          style = wx.DEFAULT_FRAME_STYLE |
wx.NO_FULL_REPAINT_ON_RESIZE)

However, if I add this part from the tutorial, I get a much smaller
window. Why is there an interference with the result I want when
adding the sizer code?

Here's the code:

# Sizer section to understand
self.sizer2 = wx.BoxSizer(wx.HORIZONTAL)
self.buttons = []

for nI in range(0, 6):
    self.buttons.append(wx.Button(self, ID_BUTTON + nI, "Button &" +
`nI`))
    self.sizer2.Add(self.buttons[nI], 1, wx.EXPAND)

self.sizer = wx.BoxSizer(wx.VERTICAL)
self.sizer.Add(self.control, 1, wx.EXPAND)
self.sizer.Add(self.sizer2, 0, wx.EXPAND)

self.SetSizer(self.sizer)
self.SetAutoLayout(1)
self.sizer.Fit(self)
# End of sizer section

Thanks

Denis


From abkhd at earth.co.jp  Mon Feb 14 03:12:16 2005
From: abkhd at earth.co.jp (A.B., Khalid)
Date: 14 Feb 2005 00:12:16 -0800
Subject: ANN: pyMinGW support for Python 2.3.5 (final) is available
References: <1108189500.707806.316520@g14g2000cwa.googlegroups.com>
	<slrnd0rmep.n4l.nick@irishsea.home.craig-wood.com>
Message-ID: <1108368736.287181.237060@o13g2000cwo.googlegroups.com>

Nick Craig-Wood wrote:
> A.B., Khalid <abkhd at earth.co.jp> wrote:
> >  This is to inform those interested in compiling Python in MinGW
that
> >  an updated version of pyMinGW is now available.
>
> Ha anyone tried cross compiling python with mingw?  At work we
compile
> our software for lots of platforms (including windows) on a linux
> build host.  The windows builds are done with a mingw cross compiler.
> It would be interesting if we could do this with python + extensions
> also.
>
> --
> Nick Craig-Wood <nick at craig-wood.com> --
http://www.craig-wood.com/nick


Hello Nick,


I haven't tried it; but could this be of any help?

http://tinyurl.com/58n5k



From jack at performancedrivers.com  Mon Feb 21 16:33:06 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Mon, 21 Feb 2005 16:33:06 -0500
Subject: iterative lambda construction
In-Reply-To: <7xy8dhd3af.fsf@ruckus.brouhaha.com>
References: <1109018810.652908.93840@f14g2000cwb.googlegroups.com>
	<7xy8dhd3af.fsf@ruckus.brouhaha.com>
Message-ID: <20050221213306.GH9263@performancedrivers.com>

On Mon, Feb 21, 2005 at 01:14:00PM -0800, Paul Rubin wrote:
> "markscottwright" <markscottwright at gmail.com> writes:
> > But when I try to do it iteratively, it just hangs when I try to
> > evaluate the results (for count > 1):
> > 
> > def repeated2(f, count):
> >     newfun = f
> >     for i in range(count-1):
> >         newfun = lambda x: newfun(f(x))
> >     return newfun
> > 
> > For the life of me, I can't figure out why.  It seems like for count =
> > 2, for example, the results from repeated2 should be lambda x: f(f(x)),
> > but it doesn't seem to be.
> 
> It's Python's scoping madness.  Try:
> 
>   def repeated2(f, count):
>      newfun = lambda x: x   # identity
>      for i in range(count):
>          newfun = lambda x, g=newfun: g(f(x))
>      return newfun

Ahh, but not sufficienty evil or pernicious.

def evil(f, count):
  def apply_evil(accum, func):
      return func(accum)
  def pernicious(x):
    return reduce(apply_evil, [f]*count, x)
  return pernicious

def f(x):
    return x+x

print evil(f, 3)(2)

More seriously I'd go without the recursion and just make a wrapper
that applies the function count times in a wrapper.

def benign(f, count):
  def wrap(x):
    result = f(x)
    for (i) in range(count-1):
      result = f(result)
    return result
  return wrap

print benign(f, 3)(2)

-Jack


From pgarcia at scpf.com  Mon Feb  7 06:24:51 2005
From: pgarcia at scpf.com (pgarcia at scpf.com)
Date: Mon, 7 Feb 2005 12:24:51 +0100
Subject: MDaemon Warning - virus found: Returned mail: Data format error
Message-ID: <20050207112625.95BA31E4009@bag.python.org>


******************************* WARNING ******************************
Este mensaje ha sido analizado por MDaemon AntiVirus y ha encontrado 
un fichero anexo(s) infectado(s).  Por favor revise el reporte de abajo.

Attachment                    Virus name               Action taken
----------------------------------------------------------------------
text.zip                      Email-Worm.Win32.Mydoom.m Removed


**********************************************************************


The original message was received at Mon, 7 Feb 2005 12:24:51 +0100 from 133.205.181.39

----- The following addresses had permanent fatal errors -----
python-list at python.org

----- Transcript of session follows -----
... while talking to 45.171.116.200:
>>> RCPT To:<python-list at python.org>
<<< 550 MAILBOX NOT FOUND


From snacktime at gmail.com  Sun Feb 20 23:56:52 2005
From: snacktime at gmail.com (snacktime)
Date: Sun, 20 Feb 2005 20:56:52 -0800
Subject: python2.4 generator expression > python2.3 list expression
Message-ID: <1f060c4c050220205648b83d83@mail.gmail.com>

I need to convert a generator expression to a list expression so it
will work under python 2.3.

I rewrote this:

for c in range(128):
  even_odd = (sum(bool(c & 1<<b) for b in range(8))) & 1

As this:

for c in range(128):
  bo = [bool(c & 1<<b) for b in range(8)]
  even_odd = sum(bo) & 1


Seems to work, is there a better way to do this?


From ggrp1.20.martineau at dfgh.net  Tue Feb 22 04:11:34 2005
From: ggrp1.20.martineau at dfgh.net (Martin Miller)
Date: 22 Feb 2005 01:11:34 -0800
Subject: Test for structure
References: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
	<mailman.2824.1108792560.22381.python-list@python.org>
	<1108937287.079367.276910@g14g2000cwa.googlegroups.com>
	<HIqdnYQVyeBCjYTfRVn-oQ@comcast.com>
	<1109012415.692798.185750@l41g2000cwc.googlegroups.com>
	<X-qdnXWyq9aDr4ffRVn-tg@comcast.com>
Message-ID: <1109063494.704440.115220@c13g2000cwb.googlegroups.com>

At the end of his last post, Steve Bethard wrote:
> That said, I find that in most cases, the better option is to use
*args
> in the original function though.  For example:
>
>      def f(arg):
>          args = aslist(arg)
>          ...
>      f(42)
>      f(['spam', 'eggs', 'ham'])
>
> could probably be more easily written as:
>
>      def f(*args):
>          ...
>      f(42)
>      f('spam', 'eggs', 'ham')
>
> Of course this won't work if you have multiple list arguments.

Very interesting, but it also doesn't let you specify a default
argument value...however this gave me the idea that it would be
possible to use the *args idea to greatly simplify the proposed
aslist() function -- when one was needed to allow default argument
values and/or for handling multiple list arguments. Namely:

def aslist(*args):
    return list(args)

def f(arg=None):
    args = aslist(arg)
    ...

f()
f(42)
f('tanstaafl')
f(['spam', 'eggs', 'ham'])

This seems fairly lean and mean, with no if, isinstance, hasattr, or
try/excepts required -- although aslist() might need a check for the
single argument of None case, depending on whether it should return []
or something besides [None] in that situation.

Best,
Martin



From claudio.grondi at freenet.de  Thu Feb  3 06:39:47 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Thu, 3 Feb 2005 11:39:47 -0000
Subject: CONTEST - What is the (best) solution?
References: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
Message-ID: <36edbdF51gkl6U1@individual.net>

> {Key11: Value11
> ....
> {Keyn1: Valuen1
> Keyn2: Valuen2
> ...
> Keynn:Valuenn}
>
> Each pair in a dictionary is separated by CRLF and in each dictionary
> numbers of pairs can be different.
> I need to read only the last dictionary.What is a
> best solution?
> Thanks
> Lad

What about (not tested):

stmFile = file(r"Path\FileNameOfTheFileWithDictionaries")
strFile = stmFile.read()
strLastDict = strFile[strFile.rfind('\n{"):]

?

Claudio






From nav+posts at bandersnatch.org  Thu Feb 17 08:09:39 2005
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: Thu, 17 Feb 2005 08:09:39 -0500
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<37hqlrF59l2b2U1@individual.net>
	<873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<421450CC.9080504@swiftdsl.com.au>
Message-ID: <87psyz8h9o.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>

"news.sydney.pipenetworks.com" <nytimes at swiftdsl.com.au> writes:

> Really ? Then why are you using python.

Try "import this" at a Python prompt. I didn't invent "Explicit is
better than implicit."

> Python or most dynamic languages are are so great because of their
> common sense towards the "implicit".

Python is not "most dynamic languages", and does not seem to
implicitly "cast" objects into other types. Python may be "dynamic",
but it's also "strongly typed", a feature I consider a benefit, though
you are of course free to disagree.

> c = "%s%s" % (a, b)
> There is an implicit str(b) here.

Not if you read the docs, as another poster has pointed out.

> ''.join(["string", 2]) to me is no different then the example above.

TypeError: sequence item 1: expected string, int found

Which pretty much supports my initial argument -- if a non-string got
into the list, something needs to be fixed, and it isn't the behavior
of the join() method!

Nick

-- 
#  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this to a python
print reduce(lambda x,y:x+chr(ord(y)-1),' Ojdl!Wbshjti!=obwAcboefstobudi/psh?')


From trentm at ActiveState.com  Fri Feb 11 13:06:05 2005
From: trentm at ActiveState.com (Trent Mick)
Date: Fri, 11 Feb 2005 10:06:05 -0800
Subject: ActivePython 2.3.5.236 and ActivePython 2.4.0.244 are available
In-Reply-To: <3736boF594g0kU1@individual.net>
References: <mailman.2356.1108082006.22381.python-list@python.org>
	<3736boF594g0kU1@individual.net>
Message-ID: <420CF40D.7000006@activestate.com>

mep wrote:
> ActivePython-2.4.0-243-win32-ix86.msi : 29M
> ActivePython-2.4.0-244-win32-ix86.msi : 18M
> What make so much difference of the size of them, which distinct  monir
> version number for 1 only.
> Any explaination?
> 


Yes, build 243 accidentally included some debug-build bits from
the included PyWin32 build in the package. These debug bits are
only intended for the separate Windows "debug" package. I fixed
this for build 244.

$ diff -qr ActivePython-2.4.0-243-win32-ix86 ActivePython-2.4.0-244-win32-ix86 | grep "Only in"
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/isapi: PyISAPI_loader_d.dll
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/isapi: PyISAPI_loader_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/pythonwin: dde_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/pythonwin: dde_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/pythonwin: Pythonwin_d.exe
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/pythonwin: Pythonwin_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/pythonwin: scintilla_d.dll
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/pythonwin: win32ui_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/pythonwin: win32ui_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/pythonwin: win32uiole_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/pythonwin: win32uiole_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: dbi_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: dbi_d.pyd
Only in ActivePython-2.4.0-244-win32-ix86/INSTALLDIR/Lib/site-packages/win32/Demos: BackupRead_BackupWrite.py
Only in ActivePython-2.4.0-244-win32-ix86/INSTALLDIR/Lib/site-packages/win32/Demos: BackupSeek_streamheaders.py
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32/libs: pywintypes_d.lib
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: mmapfile_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: mmapfile_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: odbc_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: odbc_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: perfmondata_d.dll
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: perfmondata_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: perfmon_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: perfmon_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: pythonservice_d.exe
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: pythonservice_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32/scripts: setup_d.py
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: servicemanager_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: servicemanager_d.pyd
Only in ActivePython-2.4.0-244-win32-ix86/INSTALLDIR/Lib/site-packages/win32/test: test_win32event.py
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: timer_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: timer_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win2kras_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win2kras_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32api_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32api_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32clipboard_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32clipboard_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32event_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32event_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32evtlog_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32evtlog_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32file_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32file_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32gui_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32gui_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32help_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32help_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32inet_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32inet_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32lz_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32lz_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32net_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32net_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32pdh_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32pdh_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32pipe_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32pipe_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32popenWin9x_d.exe
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32popenWin9x_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32print_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32print_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32process_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32process_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32ras_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32ras_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32security_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32security_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32service_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32service_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32trace_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32trace_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32wnet_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: win32wnet_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: winxpgui_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: winxpgui_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: _winxptheme_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32: _winxptheme_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32com/libs: pythoncom_d.lib
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/adsi: adsi_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/adsi: adsi_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/axcontrol: axcontrol_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/axcontrol: axcontrol_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/axdebug: axdebug_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/axdebug: axdebug_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/axscript: axscript_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/axscript: axscript_d.pyd
Only in ActivePython-2.4.0-244-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext: directsound
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/ifilter: ifilter_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/ifilter: ifilter_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/internet: internet_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/internet: internet_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/mapi: mapi_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/mapi: mapi_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/shell: shell_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/shell: shell_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/taskscheduler: taskscheduler_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR/Lib/site-packages/win32comext/taskscheduler: taskscheduler_d.pyd
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR: pythoncom24_d.dll
Only in ActivePython-2.4.0-243-win32-ix86/INSTALLDIR: pywintypes24_d.dll
Only in ActivePython-2.4.0-243-win32-ix86/SystemFolder: pythoncom24_d.pdb
Only in ActivePython-2.4.0-243-win32-ix86/SystemFolder: pywintypes24_d.pdb



Cheers,
Trent

-- 
Trent Mick
trentm at activestate.com


From sector119 at gmail.com  Wed Feb 16 15:54:18 2005
From: sector119 at gmail.com (sector119)
Date: 16 Feb 2005 12:54:18 -0800
Subject: PIL question. draw string with angle?
Message-ID: <1108587258.528854.260740@o13g2000cwo.googlegroups.com>

How am I able to draw a sting with some angle on image?



From simon.brunning at gmail.com  Mon Feb 14 08:23:20 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Mon, 14 Feb 2005 13:23:20 +0000
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <4210a3d9$0$23451$626a14ce@news.free.fr>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr>
	<mailman.2527.1108384715.22381.python-list@python.org>
	<4210a3d9$0$23451$626a14ce@news.free.fr>
Message-ID: <8c7f10c605021405233e9af6a9@mail.gmail.com>

On Mon, 14 Feb 2005 14:12:57 +0100, bruno modulix <onurb at xiludom.gro> wrote:
> 
> Why do you hate Perl and Ruby community that much ?

Oh, I don't. But fair's fair - we've carried our share of the burden, surely?

But-don't-get-me-started-on-those-Groovy-bastards-ly Y'rs,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From adam at eden.com  Tue Feb 15 20:15:14 2005
From: adam at eden.com (Adam)
Date: Wed, 16 Feb 2005 01:15:14 GMT
Subject: Font size
References: <42126822@news.comindico.com.au>
	<ldzqyx6byqdw$.wt8smryc0t3.dlg@40tude.net>
Message-ID: <42129ea1@news.comindico.com.au>


"BOOGIEMAN" <BOOGIEMANPN at YAHOO.COM> wrote in message 
news:ldzqyx6byqdw$.wt8smryc0t3.dlg at 40tude.net...
> On Tue, 15 Feb 2005 21:22:43 GMT, Adam wrote:
>
>> Please help me.
>> How do you clear the screen and then display a number with an enlarged 
>> font
>> size (about 300).
>> Adam.
>
> To clear screen in windows :
>
> #at the beggining of the program
> import os
>
> #when you want to clear the screen
> os.system("cls")

Thanks
I'll try that.
Adam. 




From exogen at gmail.com  Sun Feb  6 07:11:03 2005
From: exogen at gmail.com (Brian Beck)
Date: Sun, 06 Feb 2005 07:11:03 -0500
Subject: OT: why are LAMP sites slow?
In-Reply-To: <mailman.1892.1107532773.22381.python-list@python.org>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>	<opslnkqsjo6yt6e7@news.cisco.com>	<7xhdktt36q.fsf@ruckus.brouhaha.com>	<opslnr3rbs6yt6e7@news.cisco.com>	<7xacqkc0uq.fsf@ruckus.brouhaha.com>
	<mailman.1892.1107532773.22381.python-list@python.org>
Message-ID: <cu51m5$c6j$1@eeyore.INS.cwru.edu>

> Refactoring a database on a live system is a giant pain in the ass,
> simpler file-based approaches make incremental updates easier.
> 
> The Wikipedia example has been thrown around, I haven't looked at the
> code either;  except for search why would they need a database to
> look up an individual WikiWord?  Going to the database requires reading
> an index when pickle.load(open('words/W/WikiWord')) would seem sufficient.

I'm not so sure about this. If whatever is at, for example, 
words/W/WikiWord is just the contents of the entry, sure. But what about 
all the metadeta that goes along with that record? If you were to add a 
new field that is mandatory for all word records, you'd have to traverse 
the words directory and update each file, and that would require your 
own home-spun update scripts (of questionable quality). Worse, if the 
modifications are conditional.

As much as I hate working with relational databases, I think you're 
forgetting the reliability even the most poorly-designed database 
provides. Continuing with the words example: assuming all words would 
otherwise be stored in a table, consider the process of updating the 
database schema--all entries are guaranteed to conform to the new 
schema. With separate files on a filesystem, there is a much higher 
chance of malformed or outdated entries. Of course, this all depends on 
how reliable your implementation is, but consider which aspect you'd 
rather leave open to experimentation: loss of data integrity and 
possibly even data itself, or speed and efficiency?

--
Brian Beck
Adventurer of the First Order



From rson at new.rr.com  Wed Feb  9 15:38:22 2005
From: rson at new.rr.com (hawkmoon269)
Date: 9 Feb 2005 12:38:22 -0800
Subject: probably weird or stupid newbie dictionary question
In-Reply-To: <cudbch$hkb$1@lnx107.hrz.tu-darmstadt.de>
References: <1107962661.011759.30100@f14g2000cwb.googlegroups.com>
	<cudbch$hkb$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <1107981502.277980.169870@l41g2000cwc.googlegroups.com>

Very.  Thanks much. :-)

h



From fredrik at pythonware.com  Tue Feb  8 04:06:58 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 10:06:58 +0100
Subject: variable declaration
References: <1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com><MSGID_2=3A5025=2F3.131_4207fd24@fidonet.org><UmSNd.104914$Jk5.59261@lakeread01><4208178F.40804@po-box.mcgill.ca>
	<cu9ask$r81$1@sea.gmane.org>
Message-ID: <cu9vce$694$1@sea.gmane.org>

Terry Reedy wrote:

>>At compile time (by which I mean when the Python bytecode is built)
>
> Compile time is when the def statement is executed

no, that's run time.  "def" is an executable statement, just like "print", "for",
assignments, "import", etc.

the entire module is compiled (to bytecode) before any part of it is executed.
the compiler handles "global" and "from __future__", everything else is done
at runtime.

</F> 





From ilias at lazaridis.com  Sat Feb 12 08:04:34 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sat, 12 Feb 2005 15:04:34 +0200
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
In-Reply-To: <ctsjmg$75p$1@usenet.otenet.gr>
References: <ctsjmg$75p$1@usenet.otenet.gr>
Message-ID: <cukut2$94s$1@usenet.otenet.gr>

Ilias Lazaridis wrote:
[...]
> My question is essentially:
> 
> How many of those constructs are already supported by python (and the 
> surrounding open-source-projects):
> 
> http://lazaridis.com/case/stack/index.html
[...]

The Signal/Noise ratio of this thread was very disapointing to me.

I've expected better things from the python community.

Thanks to everyone which has provided in-topic replies.

.

-- 
http://lazaridis.com


From eric_brunel at despammed.com  Wed Feb 23 03:55:24 2005
From: eric_brunel at despammed.com (Eric Brunel)
Date: Wed, 23 Feb 2005 09:55:24 +0100
Subject: Mixing Txinter and Pygame
References: <mailman.2908.1109031345.22381.python-list@python.org>
	<opsmlc7ld2rqur0o@eb.pragmadev>
	<mailman.2941.1109107307.22381.python-list@python.org>
Message-ID: <opsmm62mlerqur0o@eb.pragmadev>

On Wed, 23 Feb 2005 10:23:09 +1300, Tim Knauf <bulk at upperorbit.com> wrote:
[snip]
> (When I'm starting on a language feature, though, I usually find I learn
> a lot more from worked examples than from straight command information.

You may be interested in Tkinter best kept secret: the example scripts in the Demo/tkinter sub-directory of the Python source installation. It mainly covers the basics, but may be quite helpful when you start.

HTH
  - eric -


From DanielChandran at comcast.net  Wed Feb 23 10:29:35 2005
From: DanielChandran at comcast.net (Daniel Chandran)
Date: 23 Feb 2005 07:29:35 -0800
Subject: Socks-4 Client Example in Twisted
Message-ID: <1109172575.620402.15740@f14g2000cwb.googlegroups.com>

I am looking for examples on how to write a Socks-4 client example
using the Twisted framework.  Has anybody attempted this or aware of
examples?

Thanks,
Daniel



From harlinseritt at yahoo.com  Sat Feb 26 06:48:16 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 26 Feb 2005 03:48:16 -0800
Subject: Polling selections from a listbox (Tkinter)
Message-ID: <1109418496.454931.302810@z14g2000cwz.googlegroups.com>

I am trying to poll selections from a listbox but can't seem to get it
to work correctly.

class pollstuff:
   def __init__(self, master):
      self.listbox = Listbox(master)
      self.listbox.pack()

      names = ['Bob', 'Neal', 'Mike']
      for n in names:
         self.listbox.insert(END, n)
      self.listbox.select_set(0)

      LabelStr = StringVar()
      self.label = Label(master, textvariable=LabelStr)
      self.label.pack()
      LabelStr.set(names[map(int, self.listbox.curselection())])

root = Tk()
app = pollstuff(root)
root.mainloop()

Obviously when this starts up this is going to show selection #0 inside
the label box. How do I make sure that whatever is arbitrarily selected
ends up in the label box as this gui runs? I tried doing a bind:

self.listbox.bind("<Button-1>", self.changelabel)

This did not work as intended as the changelabel's text option only
showed what the selection index was BEFORE the event took place. Does
anyone know of any special thing I need to do in order to poll the
listbox items?

Thanks,

Harlin



From Serge.Orlov at gmail.com  Thu Feb 24 04:53:02 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: 24 Feb 2005 01:53:02 -0800
Subject: Style guide for subclassing built-in types?
In-Reply-To: <1109208924.563510.212500@f14g2000cwb.googlegroups.com>
References: <ba1e306f.0502221846.70cb4d5c@posting.google.com>
	<1109127834.660822.247120@g14g2000cwa.googlegroups.com>
	<1109150091.356411.150460@l41g2000cwc.googlegroups.com>
	<1109151417.903188.73790@f14g2000cwb.googlegroups.com>
	<421c76cd$1_1@newspeer2.tds.net>
	<1109163706.118457.53720@z14g2000cwz.googlegroups.com>
	<mailman.2977.1109182909.22381.python-list@python.org>
	<1109208924.563510.212500@f14g2000cwb.googlegroups.com>
Message-ID: <1109238782.502807.13130@l41g2000cwc.googlegroups.com>

janeaustine50 at hotmail.com wrote:
> Thank you but your advice doesn't fit in my case since I want to keep
> the memory usage and the initial time minimum. iterable[::-1] would
> build another list and it would take big memory and time during
> reversing if iterable were huge. (and the "iterable" wouldn't be
> garbage-collected because I want to keep a reference to it)

You need to implement __iter__ method to pass your assert statement:
def __iter__(self):
    return reversed(self)

With regards to style guide:

1. write empty subclass
class rev_subclass(list):
    pass

2. print dir(rev_subclass) and write unit tests for every method. There
are 41 of them :) There is also __doc__ attribute you need to override.

3. Implement all the methods of rev_subclass to pass the tests.

  Serge.



From dyoo at hkn.eecs.berkeley.edu  Mon Feb 14 13:22:48 2005
From: dyoo at hkn.eecs.berkeley.edu (Daniel Yoo)
Date: Mon, 14 Feb 2005 18:22:48 +0000 (UTC)
Subject: webbrowser._iscommand(): is there a public version?
Message-ID: <cuqq9o$l6g$1@agate.berkeley.edu>

Hi everyone,


I was curious to know: does the functionality of webbrowser._iscommand()
live anywhere else in the Standard Library?

webbrowser._iscommand() is a helper function that searches through
PATH, and seems useful enough that I was surprised that it didn't live
in a more public place like os.path.

Thanks!


From klachemin at comcast.net  Fri Feb 25 02:26:31 2005
From: klachemin at comcast.net (Kamilche)
Date: 24 Feb 2005 23:26:31 -0800
Subject: web status display for long running program
References: <509534af.0502241737.5f62992@posting.google.com>
	<uvudnX-pwMGcCIPfRVn-iw@powergate.ca>
Message-ID: <1109316391.203166.119700@z14g2000cwz.googlegroups.com>

Cute! Thanks for posting that. I too like the 'web interface' concept,
it has made SmoothWall a pleasure to use, even on older machines.

I was inspired to enhance your code, and perform a critical bug-fix.
Your code would not have sent large files out to dialup users, because
it assumed all data was sent on the 'send' command. I added code to
check for the number of bytes sent, and loop until it's all gone. I
also turned it into a class, and made it 'command' based.

Have fun with it, Brian!

'''
miniweb: microscopic web server by Peter Hansen

This is a simple web server that handles one request at
a time. Therefore, it's useful mainly for administrative
tasks that have one person connected at a time.

It doesn't actually serve pages, it executes commands
based on the web page you request. The commands it
currently includes are:

    time      -  Send the time
    header    -  Echo back the original header
    largefile -  Test sending a large file back to the person
    quit      -  Shut down the web server

To add more commands, add new functions prefixed with
'request_' similar to the sample functions below.
As you add functions, the menu choices displayed to
the user are automatically updated.

I fixed the 'send' feature so it could send large files.
Before, it would send the first X bytes, then stop
without checking to make sure all bytes were went.
I also made it a class, created the 'command based'
feature, and added the auto-updating menu choices.

Have fun with it!

--Kamilche

'''

import socket
import select
import datetime

_HEADER = '\r\n'.join([
    'HTTP/1.0 %s',
    'Server: Miniweb-0.1',
    'Content-Type: text/html',
    'Connection: close',
    'Content-Length: %d',
    '',
    '',
    ])

_BODY = '\r\n'.join([
    '<html><head><title>%s</title></head>',
    '<body><h3>%s</h3>\r\n%s\r\n</body></html>',
    ])

_QUIT = False


class WebServer(object):

    def __init__(self, port):
        ' Start listening on the specified port'
        self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.socket.bind(('', port))
        self.socket.listen(5)

        ' Build the list of menu choices'
        self.menu = '<pre>\n'
        for key, value in self.__class__.__dict__.items():
            if key[:8] == 'request_':
                self.menu += "%-10s- %s\r\n" % (key[8:], value.__doc__)
        self.menu += '</pre>\n'

    def Timer(self):
        ' Process new requests'
        r, w, e = select.select([self.socket], [], [], 0.0)
        if not r:
            return
        cs = self.socket.accept()[0]
        header = ''
        while not '\r\n\r\n' in header:
            r, w, e = select.select([cs], [], [cs], 2.0)
            if not r or e:
                break
            header += cs.recv(1024)
        status = '200 OK'
        title = "Miniweb!"
        if not '\r\n\r\n' in header:
            status = '408 Request Timeout'
            body = ['Your request was not received in time.']
        else:
            lines = header.split('\r\n')
            words = lines[0].split(' ')
            request = ' '.join(words[1:-1])
            request = request[1:]
            if request == '':
                fn = self.default
            else:
                fn = getattr(self, 'request_' + request, None)
                if not fn:
                    status = '404 Not Found'
                    fn = self.notfound
            body = fn(header, request)

        body = _BODY % (title, title,
               ''.join([str(arg) for arg in body]))
        header = _HEADER % (status, len(body))
        data = header + body
        while len(data) > 0:
            cc = cs.send(data)
            data = data[cc:]
        cs.close()

    def default(self, header, request):
        ' Print the available choices'
        return ('Welcome to Miniweb!',
                'Available commands are:<p>',
                self.menu)

    def notfound(self, header, request):
        ' Handle unknown requests'
        return ('Unknown request <pre>', request, '</pre>',
            'Your header was:<br><pre>', header, '</pre>',
            'Available commands are:<p>', self.menu)

    def request_time(self, header, request):
        ' Send the time'
        return ('The time is ', datetime.datetime.now(), '<p>')

    def request_header(self, header, request):
        ' Echo back the original header'
        return ('Your header was:<br><pre>', header, '</pre>')

    def request_largefile(self, header, request):
        ' Test sending a large file back to the person'
        temp = ['<pre>\r\n']
        for i in range(10000):
            temp.append("This is line %d of the result.\r\n" % i)
        temp.append('</pre>')
        return temp

    def request_quit(self, header, request):
        ' Shut down the web server'
        global _QUIT
        _QUIT = True
        return ('Web server shut down at ', datetime.datetime.now())


def main():
    ' Main loop'
    server = WebServer(80)
    while not _QUIT:
        server.Timer()
    print "Done!"

main()



From ncoghlan at iinet.net.au  Fri Feb 11 05:11:57 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 11 Feb 2005 20:11:57 +1000
Subject: namespaces module (a.k.a. bunch, struct, generic object, etc.)
 PEP
In-Reply-To: <740c3aec05021016372f22168@mail.gmail.com>
References: <GaudndOHLML3M5bfRVn-vg@comcast.com>	<pan.2005.02.10.15.10.26.594432@jerf.org>	<tdidnQsgbbTiW5bfRVn-pA@comcast.com>	<pan.2005.02.10.17.14.21.836748@jerf.org>
	<740c3aec05021016372f22168@mail.gmail.com>
Message-ID: <420C84ED.7000708@iinet.net.au>

BJ?rn Lindqvist wrote:
> I like it alot! My only minor complaint is that the name is to long.
> Also I *really wish* the Namespace could do this:
> 
> r, g, b = col = Namespace(r = 4, g = 3, b = 12)
> 
> But alas, I guess that's not doable within the scope of the Namespace PEP. 

You can almost spell that already, it just won't do what you want:

   r, g, b = col = dict(r = 4, g = 3, b = 12).values()

The dict-based implementation means named tuples they ain't :)

However, the namespaces module *would* provide a natural location for a 
NamedTuple class.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From kirk at strauser.com  Fri Feb  4 16:48:52 2005
From: kirk at strauser.com (Kirk Strauser)
Date: Fri, 04 Feb 2005 15:48:52 -0600
Subject: Pickling and inheritance are making me hurt
Message-ID: <477dd2xhuk2.ln2@news.conpoint.com>

I have a module that defines a Search class and a SearchResult class.  I use
these classes by writing other modules that subclass both of them as needed
to interface with particular search engines.

My problem is that Search defines a method (called automatically by __del__)
to save its results between invocations:

    def _saveresults(self):
        self._oldresults = self._results
        file = open(self._storefile(), 'w')
        pickle.dump(self._oldresults, file)
        file.close()

The problem I'm having is the the pickle.dump call is failing whenever the
objects in "self.data" are instances of derivatives of SearchResult rather
than instances of SearchResult itself (which is pretty much always the
case):

    Exception pickle.PicklingError: <pickle.PicklingError instance at
0xb7f7ad6c> in <bound method Search.__del__ of <__main__.Search object at
0xb7ec954c>> ignored


Now, if I overload _saveresults inside a subclass of Search, then it works. 
It seems like the problem is that _saveresults is only looking inside the
same namespace as Search (where it's originally defined), even if it's
actually been inherited by another class in a different module.  Is there a
way around this?

-- 
Kirk Strauser


From simonwittber at gmail.com  Sun Feb 27 21:02:33 2005
From: simonwittber at gmail.com (Simon Wittber)
Date: Mon, 28 Feb 2005 10:02:33 +0800
Subject: Pyallegro status (is it dead?). What about pygame.
In-Reply-To: <cvt44c$s4f$1@julia.coi.pw.edu.pl>
References: <cvt44c$s4f$1@julia.coi.pw.edu.pl>
Message-ID: <4e4a11f8050227180243ddd40@mail.gmail.com>

> How does pygame compare to pyallegro - both in maturity and convenience
> of usage in python?


I have not used pyallegro, and therefore cannot compare it to pygame.

However, I can tell you that the pygame community is quite active and
friendly. They're currently testing the pygame 1.7 release.  As for
maturity and ease of use... I suggest you check out the 'gamelets'
sections on the pygame website for some short examples of python code
which uses pygame.

Sw.


From tundra at tundraware.com  Tue Feb  1 14:48:14 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 01 Feb 2005 14:48:14 EST
Subject: Nokia Chooses Python
Message-ID: <6035d2-o8e.ln1@eskimo.tundraware.com>

http://press.nokia.com/PR/200501/978226_5.html
-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/



From duncan.booth at invalid.invalid  Tue Feb 22 04:14:50 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 22 Feb 2005 09:14:50 GMT
Subject: python2.4 generator expression > python2.3 list expression
References: <mailman.2882.1108961815.22381.python-list@python.org>
	<m2oeee5e2k.fsf@unique.fully.qualified.domain.name.yeah.right>
Message-ID: <Xns960552849F9ACduncanrcpcouk@127.0.0.1>

Dan Sommers wrote:

>> Seems to work, is there a better way to do this?
> 
> for c in range( 128 ):
>     even_odd = 0
>     print '%3d' % c,
>     while c:
>         c &= c - 1
>         even_odd = not even_odd
>     print int( even_odd )
> 
> Okay, so your inner loop is only counting to 8, but IMO this is a good
> example of how to use a better algorithm instead of optimizing the code
> of a na??ve one.  My inner loop only iterates over 1-bits.
> 

Here's yet another way to achieve the same results. This version doesn't 
iterate over any bits at all:

>>> import operator
>>> parity = [ False ]
>>> for i in range(7):
        parity += map(operator.not_, parity)

And if you want the same output:

>>> for even_odd in parity:
        print int(even_odd)


From ncoghlan at iinet.net.au  Wed Feb  9 06:56:54 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Wed, 09 Feb 2005 21:56:54 +1000
Subject: empty classes as c structs?
In-Reply-To: <1grnyld.1t8l5kw1nr5aqsN%aleaxit@yahoo.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<7rSdne7BcbDeV57fRVn-jg@comcast.com>	<mailman.1963.1107594941.22381.python-list@python.org>	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>	<mailman.1973.1107618702.22381.python-list@python.org>	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>	<mailman.2006.1107658273.22381.python-list@python.org>	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>	<mailman.2049.1107750700.22381.python-list@python.org>	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com>	<4207606E.4040806@iinet.net.au>
	<cu8amb$ufa$1@sea.gmane.org>	<mailman.2158.1107859833.22381.python-list@python.org>
	<1grnyld.1t8l5kw1nr5aqsN%aleaxit@yahoo.com>
Message-ID: <4209FA86.2060009@iinet.net.au>

Alex Martelli wrote:
> One thing I'd like to see in namespaces is _chaining_ -- keeping each
> namespace separate but having lookups proceed along the chain.  (The
> best semantics for _bindings_ as opposed to lookups isn't clear though).

Hmm, so if it doesn't find it in the current namespace, it looks in the parent?

For bindings, you could just go with standard Python semantics - normal name 
binding always happens in the innermost scope, so binding a name in a namespace 
should happen in the directly referenced namespace. Then you can shadow names 
from outer scopes, and later regain access to them using 'del'.

Rough concept:
   Have a '__fallback__'** attribute that is initialised to None
   Have a custom __getattr__ that falls back to the containing namespace if the 
result is not found in the current namespace.
   Have a class method which allows a namespace to be 'put inside' another 
namespace.

** Blech. Trying to add *any* state to namespace instances is going to suck. 
Maybe it would be better to just have a single __impl__ attribute and have any 
implementation related variables hang off it. This could make life easier when 
subclassing. I'm tempted to say update() should just ignore any field with a 
leading underscore by default (then we can just use normal private attributes, 
which are altered at the user's risk), but that may be too draconian.


On a complete tangent, I thought it might be worthwhile summarising the ideas 
that have come up in this thread

  - using type(self).method(self,...) as a polymorphism friendly way to access a 
class method.

  - a 'view' alternate constructor to allow manipulation of an existing 
dictionary such as globals()

  - a 'record' data type that allows the use of class definition syntax for 
simple data structures

  - lookup chaining, allowing fallback to an 'outer scope'.


Even though we'll probably end up dropping the last couple as overengineering 
things for the first pass, they're still interesting ideas to kick around.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From marco at server.escape.org  Fri Feb 25 15:25:53 2005
From: marco at server.escape.org (Marco Nicosia)
Date: Fri, 25 Feb 2005 20:25:53 GMT
Subject: File descriptor open in one thread, closed in another?!
Message-ID: <lRLTd.9382$Pz7.4018@newssvr13.news.prodigy.com>

Hello gang,

My coworker and I are writing a Python class for the other developers
within our team. This class is supposed to encapsulate several things,
including daemonizing, setting up logging, and spawning a thread to
host an XML-RPC server.

I'm having a real problem with logging.Logger and threading.Thread. In
the main thread, we set up two loggers, each with file handlers. We
then spawn the xml-rpc server thread, and allow the parent thread to
continue. At some point, the stream of the file handlers appears to be
closed from the xml-rpc server's thread, but still open from the POV
of the parent thread?! How is this possible?

Here's the POV from the child thread:
--------------------
> /Users/marco/work/cam/services/common/lib/camService.py(226)__run_xr_server()
-> self.loggers['main'].info("ABOUT TO WAIT FOR START")
(Pdb) self._camBaseService__serviceLog._camLog__handlers['file']['main']['handler'].stream
<closed file '/Users/marco/work/cam/services/camd/var/logs/camd-main.log', mode 'a' at 0x142d890>
(Pdb) n
Traceback (most recent call last):
  File "/export/crawlspace/cam/python/builds/current/python-2.4-cam/lib/python2.4/logging/handlers.py", line 62, in emit
    if self.shouldRollover(record):
  File "/export/crawlspace/cam/python/builds/current/python-2.4-cam/lib/python2.4/logging/handlers.py", line 132, in shouldRollover
    self.stream.seek(0, 2)  #due to non-posix-compliant Windows feature
ValueError: I/O operation on closed file
--------------------

And here's the POV from the parent thread:
--------------------
(Pdb) camd._camBaseService__serviceLog._camLog__handlers['file']['main']['handler'].stream
<open file '/Users/marco/work/cam/services/camd/var/logs/camd-main.log', mode 'a' at 0x142e890>
--------------------


Obviously, these are two different pdb runs, but I've stepped through
the parent very carefully, and stream.close() is NEVER called, either
by the child nor the parent. BUT, while it continues to appear open to
the parent, it clearly IS changed in the child. How is this even
possible?! They're the same file handle!

Here are some code snippets. Unfortunately, we have a considerable
amount of inheritance going on.

>From the parent:
--------------------
if __name__ == "__main__":
    camd = camBaseService("camd", parsedOptions.configFile, configDef)
    if not camd.start():
        print "Start failed, exiting..."
        sys.exit(1)

    camd.loggers['main'].info("Main loop waiting for XML-RPC Server to quit.")
--------------------

Any call to that info() method will continue to work forever.

camBaseService does some initialziation in that camd object:
--------------------
        # Flags for communicating to the XRServer thread
        self.xrStart       = False
        self.xrInitialized = False
        self.__initialize_logging()
            self.loggers['xr-server'] = self.__serviceLog.add_logger('xr-server')
            self.loggers['main'] = self.__serviceLog.add_logger('main')
        self.xrSvcThread = threading.Thread(target=self.__run_xr_server)
--------------------

camd.start (see __main__, above) spawns the thread, so it runs this
code in the parent thread:
--------------------
        self.xrSvcThread.start()
        i = 0
        while i < 10 and not self.xrInitialized:
            if not self.xrInitialized:
                i = i + 1
                time.sleep(1)
        if self.xrInitialized:
            self.xrStart = True
            return True
--------------------

In the child thread:
--------------------
        # some misc configuration goo
        self.xrInitialized = True

        self.loggers['main'].info("ABOUT TO WAIT FOR START")
--------------------

I've isolated the switch from open to closed (from the POV of the
child ONLY) to that exchange of flags xrInitiated (child says, "I'm
ready to go!") to the parent thread's setting xrStart (ok! go!).


Can anyone PLEASE help me understand what's going on here?
-- 
_______________________________________________________________________
Marco E. Nicosia  |  http://www.escape.org/~marco/  |  marco at escape.org


From tjreedy at udel.edu  Mon Feb 28 20:54:39 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 28 Feb 2005 20:54:39 -0500
Subject: yield_all needed in Python
References: <lck6osnu68.fsf@gaffa.mit.edu>
Message-ID: <d00hoc$7jj$1@sea.gmane.org>


"Douglas Alan" <nessus at mit.edu> wrote in message 
news:lck6osnu68.fsf at gaffa.mit.edu...
>     We can shorten the code--and make it run in O(N) time--by adding a 
> new
>     keyword to replace the "for v in ...: yield v" pattern:

Maybe.  Until you define the semantics of yield_all and at least outline an 
implementation, I am not convinced of 'run in o(n) time'.  There was once a 
several-post discussion of a related idea of having yield somehow, 
magically, skip intermediate generators that only yielded value on up, 
without tranformation.  But it was never clear how to do this practically 
without negatively impacting all generators.  Cetainly, if <yield_all 
iterator> == <for i in iterator: yield i>, I don't see how anything is 
gained except for a few keystrokes.  If <yield_all iterator> == <yield 
list(i for i in iterator)> then the replacement is a semantic change.

>       def in_order(self):
>           if self.left is not None:
>               yield_all self.left.in_order():
>           yield self.value
>           if self.right is not None:
>               yield_all self.right.in_order():

If and when I write a text-based double-recursion to iteration transformer, 
a pseudokeyword might be be an idea for indicating that stacked yields are 
identify functions and therefore bypassable.

Terry J. Reedy





From rory at campbell-lange.net  Tue Feb 15 12:43:37 2005
From: rory at campbell-lange.net (Rory Campbell-Lange)
Date: Tue, 15 Feb 2005 17:43:37 +0000
Subject: Newbie question about class operator overloading
Message-ID: <20050215174336.GA24104@campbell-lange.net>

Hi. I'm just starting to use python.

I am anxious about how best to set and access items one level down in a
data structure if I am using __setitem__ and __getitem__.

At the moment I can do

for a data structure Data:

    object.Data = { 'one' : [1, 2, {}, 4],
                    'two' : [5, 6, {}, 8]}

I can use normal __setitem__ and __getitem__ to address Data keys very
easily

However, if I wish to access object.Data['one'][0] for instance, I am
using the following:

object['three'] = [0, 'val0'] # set
x =  object['three'][0]       # get

Is this advisable? I'm worried the syntax is very odd.

Extract from an example class:

	def __setitem__ (self,key,value): 
		if type(value) == list and type(value[0]) == int:
			if key not in self.data:
				self.data[key] = {} 
			self.data[key][value[0]] = value[1]
		else:
			self.data[key] = value

	def __getitem__ (self,key,value=None): 
		if not value==None:
			return self.data[key][value]
		else:
			return self.data[key]

-- 
Rory Campbell-Lange 
<rory at campbell-lange.net>
<www.campbell-lange.net>


From t-meyer at ihug.co.nz  Tue Feb 22 23:45:37 2005
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Wed, 23 Feb 2005 17:45:37 +1300
Subject: reading only new messages in imaplib
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E8022289B2@its-xchg4.massey.ac.nz>
Message-ID: <ECBA357DDED63B4995F5C1F5CBE5B1E801DAFEBE@its-xchg4.massey.ac.nz>

> Is it posssible to read only the new messages or unread 
> messages using imaplib in python? If it is possible pls 
> specify the module or give a sample code.

This will print out the first 20 chars of each undeleted message.  You
should be able to figure out how to do what you want from it.

>>> import imaplib
>>> i = imaplib.IMAP4("mail.example.com")
>>> i.login("username", "password")
('OK', ['[CAPABILITY IMAP4REV1 IDLE NAMESPACE MAILBOX-REFERRALS BINARY
UNSELECT SCAN SORT THREAD=REFERENCES THREAD=ORDEREDSUBJECT MULTIAPPEND] User
username authenticated'])
>>> i.select()
('OK', ['12'])
>>> for msg_num in i.search(None, "UNDELETED")[1][0].split():
... 	msg = i.fetch(str(msg_num), "RFC822")
... 	print msg[1][0][1][:20]
... 
Return-Path: <kelly_
Return-Path: <J.M.La
Return-Path: <H.L.Sc
Return-Path: <elenat
[etc]

Simply playing around with an imaplib.IMAP4 class in an interactive prompt,
with imaplib.debug set to 4 and a copy of the RFC handy is the best way to
learn.

=Tony.Meyer



From michele.simionato at gmail.com  Thu Feb 17 03:42:55 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 17 Feb 2005 00:42:55 -0800
Subject: low-end persistence strategies?
In-Reply-To: <mailman.2746.1108629315.22381.python-list@python.org>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<mailman.2735.1108616299.22381.python-list@python.org>
	<1108622622.119311.43200@f14g2000cwb.googlegroups.com>
	<mailman.2746.1108629315.22381.python-list@python.org>
Message-ID: <1108629775.800508.3400@f14g2000cwb.googlegroups.com>

John Lenton:
> the operating system cleans up the lock.

So, are you effectively saying than a custom made solution based on
flock
can be quite reliable and it could be a reasonable choice to use
shelve+flock
for small/hobbysts sites? I always thought locking was a bad beast and
feared
to implement it myself, but maybe I was wrong afterall ...

         Michele Simionato



From ncoghlan at iinet.net.au  Sat Feb 26 11:21:35 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 27 Feb 2005 02:21:35 +1000
Subject: any Python equivalent of Math::Polynomial::Solve?
In-Reply-To: <just-420C1F.16423926022005@news1.news.xs4all.nl>
References: <just-420C1F.16423926022005@news1.news.xs4all.nl>
Message-ID: <4220A20F.6080605@iinet.net.au>

Just wrote:
> While googling for a non-linear equation solver, I found 
> Math::Polynomial::Solve in CPAN. It seems a great little module, except 
> it's not Python... I'm especially looking for its poly_root() 
> functionality (which solves arbitrary polynomials). Does anyone know of 
> a Python module/package that implements that?
> 
> Just

Does SciPy do what you want? Specifically Scientific.Functions.FindRoot [1] & 
Scientific.Functions.Polynomial [2]

Regards,
Nick.

[1]
http://starship.python.net/~hinsen/ScientificPython/ScientificPythonManual/Scientific_9.html
[2]
http://starship.python.net/~hinsen/ScientificPython/ScientificPythonManual/Scientific_13.html


-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From usenet_spam at janc.invalid  Fri Feb 18 17:44:36 2005
From: usenet_spam at janc.invalid (JanC)
Date: Fri, 18 Feb 2005 22:44:36 GMT
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq1he$cd7$1@news1.ucsd.edu>
Message-ID: <Xns9601F1875C75CJanC@213.118.75.209>

Robert Kern schreef:

> And yet there is not one company that has someone devoted full-time to 
> developing Python.

Except for 'future Python' aka PyPy...
<http://codespeak.net/pipermail/pypy-dev/2004q4/001696.html>

   :)

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From tjreedy at udel.edu  Thu Feb  3 23:52:00 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 3 Feb 2005 23:52:00 -0500
Subject: Where are list methods documented?
References: <41ffba7d$0$15879$a1866201@visi.com>
	<cpasm4esggs.fsf@cabernet.nelson.monkey.org>
Message-ID: <ctuv04$rj5$1@sea.gmane.org>


"Nelson Minar" <nelson at monkey.org> wrote in message 
news:cpasm4esggs.fsf at cabernet.nelson.monkey.org...
> You're not the only one with a hard time finding the list
> documentation. It's even crazier for string docs.

To repeat the advice I gave someone asking about dict methods:

Read or at least skim thru chapter 2 of the Library Reference Manual on 
builtin functions and types so you have a general idea of what is where. 
And either before or after, look at the table of contents for general 
organization and index availability

Terry J. Reedy





From eurleif at ecritters.biz  Mon Feb 14 04:43:00 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Mon, 14 Feb 2005 04:43:00 -0500
Subject: multi threading in multi processor (computer)
In-Reply-To: <420e7ee4$0$28976$e4fe514c@news.xs4all.nl>
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<420a2938$0$22987$626a14ce@news.free.fr>
	<1107964587.818199.223980@g14g2000cwa.googlegroups.com>
	<mailman.2254.1107966236.22381.python-list@python.org>
	<7xr7jlwieq.fsf@ruckus.brouhaha.com>
	<420e7ee4$0$28976$e4fe514c@news.xs4all.nl>
Message-ID: <37ba2dF5b8slrU1@individual.net>

Irmen de Jong wrote:
> the GIL must die.
> 
> I couldn't resist:
> http://www.razorvine.net/img/GIL.jpg

Neither could I:

http://ecritters.biz/diegil.png

(In case it's not entirely obvious, the stick figure just slices the GIL 
into two pieces with his sword, causing its blood to splatter on the wall.)


From kent37 at tds.net  Wed Feb 23 23:28:30 2005
From: kent37 at tds.net (Kent Johnson)
Date: Wed, 23 Feb 2005 23:28:30 -0500
Subject: On eval and its substitution of globals
In-Reply-To: <1109204271.132781.252070@o13g2000cwo.googlegroups.com>
References: <1108828170.372593.150790@g14g2000cwa.googlegroups.com>
	<1109136736.670038.236040@z14g2000cwz.googlegroups.com>
	<421c7423$1_1@newspeer2.tds.net>
	<1109187171.586056.216950@l41g2000cwc.googlegroups.com>
	<3847qgF5l61aqU1@individual.net>
	<1109204271.132781.252070@o13g2000cwo.googlegroups.com>
Message-ID: <421d54c9$1_1@newspeer2.tds.net>

Paddy wrote:
> I do in fact have the case you mention. I am writing a module that will
> manipulate functions of global variables where the functions are
> defined in another module.

Would it be possible to have your functions take arguments instead of globals? That would seem to be 
a better design.

Kent


From aleaxit at yahoo.com  Tue Feb  1 13:19:15 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Tue, 1 Feb 2005 19:19:15 +0100
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<uImdnUAKxbKaFWPcRVn-2A@telcove.net>
	<1107205410.367521.50490@f14g2000cwb.googlegroups.com>
	<44SdnUZGopnrAWLcRVn-pg@telcove.net>
	<1107275364.730411.24710@c13g2000cwb.googlegroups.com>
Message-ID: <1grbjim.1pkh5toxl7g9dN%aleaxit@yahoo.com>

Michael Tobis <mt at 3planes.com> wrote:
   ...
> I don't know that it's ever necessary to rebind, but it is, in fact,
> common, and perhaps too easy. In numeric Python, avoiding rebinding
> turns out to be a nontrivial skill. 

Well, a for-statement is BASED on rebinding, for example.  Maybe you
don't mean to address rebinding per se, but rebinding in ``separate
statements''?  The ``separation'' needs to be defined carefully to make
while-loops work, too.  Normally, a while-statement's header clause
would be something like:
    while <expression>:
where the expression depends on the values bound to some local
variables.  For the first evaluation, the variables need to be bound by
earlier statements; for the expression to eventually become false, it's
likely (unless we're talking about mutable objects) that the variables
need to be re-bound in the loop body.

For example, consider:

def f(a, b):
    x = 0 
    while x < 100000:
        print x,
        x = a*x + b
    print

would you require the programmer to find out a closed-form expression
for this recurrence relation, in order to avoid having to rebind the
name 'x'?  OK, in this particular case it may be OK, if you are willing
to put competence in college-level algebra as a prerequisite for using
Python.  But what if the rebinding in the body of the loop was to a more
complicated expression on x?  What if it was something like x=g(x)?  I'm
afraid we'd end up with weird constructs such as:

def ff(g):
    x = [0]
    while x[-1] < 100000:
        print x[-1],
        x.append(g(x[-1]))
    print

if we had to avoid rebinding completely.  Or, you could force the
iteration to be changed into a recursion... but then you'd better be
prepared to remove the current 'recursion limit' AND offer tail-call
optimization possibilities, at the very least.

All in all, I fail to see what gains would be expected by making Python
into a single-assignment or single-binding language, even on a module by
module basis, to repay this kind of awkwardness.


Alex


From usenet_spam at janc.invalid  Mon Feb 21 07:53:55 2005
From: usenet_spam at janc.invalid (JanC)
Date: Mon, 21 Feb 2005 12:53:55 GMT
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr>
	<42185b05$0$15460$9b622d9e@news.freenet.de>
	<cv9sdo$69n$3@usenet.otenet.gr>
	<42189527$0$6260$9b622d9e@news.freenet.de>
	<cvadcj$mqc$1@usenet.otenet.gr>
	<mailman.2866.1108917759.22381.python-list@python.org>
	<cvafgu$2lk$1@usenet.otenet.gr>
	<4218cafe$0$8790$9b622d9e@news.freenet.de>
	<1108922969.140196.304380@z14g2000cwz.googlegroups.com>
	<878y5i9ayp.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
Message-ID: <Xns96048D62E3A07JanC@213.118.32.254>

Nick Vargish schreef:

> Please consider a visit to
> tinyurl.com before posting a monster like that... :^)

As long as he also posts the full URL...

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From littlejohn.75 at news.free.fr  Fri Feb  4 13:57:36 2005
From: littlejohn.75 at news.free.fr (F. Petitjean)
Date: 04 Feb 2005 18:57:36 GMT
Subject: newbie: Syntax error
References: <TrPMd.13383$3W3.8066@bignews4.bellsouth.net>
Message-ID: <4203c5a0$0$504$626a14ce@news.free.fr>

Le Fri, 4 Feb 2005 12:49:51 -0600, Chad Everett a ?crit :
> Hi Everyone,
> 
> I am new to Python and programming in general.  I bought the book "Python
> Programming for the Absolute Beginner" by michael Dawson.
> 
> I am trying to make a coin flip program and keep geting a Synax Error
> "invalid syntax".
> 
> If anyone has a moment could you please look at it and tell me what I am
> doing wrong.
> 
> thanks for your time and patience.
> 
> Chad
> 
> # Coin Flip Program
> # This program flips a coin 100 times and tells the number of heads and
> tails.
> # Chad Everett 2/3/2005
> 
> 
> print "\t\t********Coin Flip Game*********\n"
> import random
> 
> # heads = 1
> # tails = 2
> 
> tries = random.randrange(2) + 1
> count = 1
> 
> while count != 100:
>     if tries == 1:
>         heads = 1
>         count += 1
> 
>     else tries == 2:  # I AM GETTING THE SYNTAX ERROR HERE
      elif tries == 2:  # should be better
>         tails = 1
>         count += 1
> 
> print "heads: " + heads
> print "tails: " + tails
> 
> raw_input("Press enter to quit") 
> 
> 


From steven.bethard at gmail.com  Wed Feb  2 19:23:40 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 02 Feb 2005 17:23:40 -0700
Subject: global variables
In-Reply-To: <1107388493.465599.140480@g14g2000cwa.googlegroups.com>
References: <1107385488.822768.317250@l41g2000cwc.googlegroups.com>
	<1107388493.465599.140480@g14g2000cwa.googlegroups.com>
Message-ID: <3YSdnYVEmOCW8pzfRVn-sg@comcast.com>

M.E.Farmer wrote:
> alex wrote:
>> is it possible to create 'global' variables that can be seen in all
>> other classes?
>
> What about using a class?
> 
> Py> class globalVar:
> ...    pass
> 
> Py> globals = globalVar()

Probably naming it something other than 'globals' would be a good idea 
-- otherwise you'll hide the builtin globals() function.

But I agree that the attributes of a class instance (as you suggest) or 
the attributes of a module (as Steve Holden suggests) is probably the 
right way to go.

Steve


From petr at tpc.cz  Mon Feb 14 16:39:41 2005
From: petr at tpc.cz (McBooCzech)
Date: 14 Feb 2005 13:39:41 -0800
Subject: Considering python - have a few questions.
In-Reply-To: <eZAPd.21496$Ka6.148459@news1.mts.net>
References: <eZAPd.21496$Ka6.148459@news1.mts.net>
Message-ID: <1108417180.958329.290800@z14g2000cwz.googlegroups.com>

I am trying to find answers to the similar problem for nearly two
months. After this time it looks for me like this:

language: Python 2.3 or 2.4

IDE: Eric3

GUI toolkit: Qt (commercial but free under GPL for Linux and Mac)
http://www.trolltech.com/products/qt/index.html
(version 4 will be released soon according their web and will be
released for free as well (GPL)
http://www.trolltech.com/newsroom/announcements/00000192.html

binding for Python to Qt: PyQt
http://www.riverbankcomputing.co.uk/pyqt/index.php

Database: Firebird 1.5

Some guys here are talking good about and Boa as well, but I would
like to prefer some professional solution.

All of course IMHO :))
HTH

Petr Jakes



From sjmachin at lexicon.net  Fri Feb 11 18:00:02 2005
From: sjmachin at lexicon.net (John Machin)
Date: 11 Feb 2005 15:00:02 -0800
Subject: newbie question
References: <1107990182.516041.120410@o13g2000cwo.googlegroups.com>
	<seudnRY79e_AXJffRVn-pg@rogers.com>
Message-ID: <1108162802.851817.123590@f14g2000cwb.googlegroups.com>


Dan Perl wrote:
> <doodle4 at gmail.com> wrote in message
> news:1107990182.516041.120410 at o13g2000cwo.googlegroups.com...
> > Hello All,
> > What is the python equivalent of the following statement?
> >
> > while (n--)
>
> Like other posters said, you should give more details with your
question.
> What do you mean by equivalent?  The following is *functionally*
equivalent:
>     for n in range(start, 0, -1):
>
> Of course, there is always:
>     while n:
>         ...
>         n -= 1

errrmmm it's a C while stmt with post-decrement; that's NOT the same
as:

for (; n; n--) ...

If n is initially 3, the loop body is executed with n set to 2,1,0 and
after exit n is -1.

The nearest Python equivalents of "while (n--) func(n);" are
(making the charitable assumption that initially n >= 0):

! while n:
!     n -= 1
!     func(n)

and

! for n in range(n-1, -1, -1):
!     func(n)

>
> But unfortunately, no, I don't think there is an equivalent in python
that
> has the conciseness of the C statement.  The pre- and post-increment
> and -decrement in C/C++/Java are very powerful and I miss them in
python.

Unfortunately?? What are you missing? The ability to write cryptic crap
that you don't understand & that's so "powerful" that you can get into
deep kaka really quickly? Hope you weren't writing software for
embedded devices -- like heart pacemakers :-)



From kartic.krishnamurthy at gmail.com  Tue Feb  1 14:41:01 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 1 Feb 2005 11:41:01 -0800
Subject: How do you do arrays
In-Reply-To: <tbunce-0102051052450001@192.168.1.12>
References: <tbunce-0102051052450001@192.168.1.12>
Message-ID: <1107286861.714451.288010@f14g2000cwb.googlegroups.com>

Tom,

It has to be iMatrix.append(k), not iMatrix[index] = k. Python will
give an error - list assignment index out of range - for that.
Just curious - what book are you following?

-Kartic



From mechanicalamit at yahoo.co.uk  Mon Feb 14 12:55:31 2005
From: mechanicalamit at yahoo.co.uk (Amit Dhingra)
Date: Mon, 14 Feb 2005 12:55:31 -0500
Subject: [newbie] - How to remain at prompt after script execution?
References: <DZ4Qd.1411$UN1.71@news.itd.umich.edu>
	<mailman.2551.1108402459.22381.python-list@python.org>
Message-ID: <2D5Qd.1413$UN1.28@news.itd.umich.edu>

Thanx Fredrik, that works and thats what I wanted.

Amit

"Fredrik Lundh" <fredrik at pythonware.com> wrote in message
news:mailman.2551.1108402459.22381.python-list at python.org...
> Amit Dhingra wrote:
>
> > I would like to excute a script and upon completion, how can I just a
python
> > prompt with the functions and variables already defined.
> >
> > I know you can do this in the window gui(IDLE). I was wondering if this
can
> > be done in POSIX systems as well.
>
> does "python -i" do what you want?
>
> $ python -h
> usage: python [option] ... [-c cmd | -m mod | file | -] [arg] ...
> Options and arguments (and corresponding environment variables):
> -c cmd : program passed in as string (terminates option list)
> -d     : debug output from parser (also PYTHONDEBUG=x)
> -E     : ignore environment variables (such as PYTHONPATH)
> -h     : print this help message and exit
> -i     : inspect interactively after running script, (also
PYTHONINSPECT=x)
>          and force prompts, even if stdin does not appear to be a terminal
> ...
>
> $ more myprogram.py
> message = "hello, world"
> print messae
> $ python -i myprogram.py
> hello, world
> >>> print message.upper()
> HELLO, WORLD
>
> </F>
>
>
>




From steve at holdenweb.com  Wed Feb  2 18:22:16 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 02 Feb 2005 18:22:16 -0500
Subject: Generating .pyc/.pyo from a make file
In-Reply-To: <4201607f_2@news.arcor-ip.de>
References: <4308d2-0801.ln1@eskimo.tundraware.com>
	<42015a85_1@news.arcor-ip.de>
	<dh38d2-at71.ln1@eskimo.tundraware.com>
	<4201607f_2@news.arcor-ip.de>
Message-ID: <RldMd.102645$Jk5.24461@lakeread01>

Roland Heiber wrote:

> Tim Daneliuk wrote:
> 
>> It does - thanks.  One more question:  Are pyc and pyo file portable
>> across operating systems?  I suspect not since I generated a pyo
>> on a FreeBSD machine that will not run on a Win32 machine.  I was
>> under the impression that "compiled" meant optimized byte code that
>> was portable across implementations, but it looks to not be the case...
>>
> 
> Hi,
> 
> ..pyc's should be, cause it's standard python-bytecode, if you use 
> massive optimizations it depends not on the os but on the underlying 
> cpu/architecture ...
> 
> So long, Roland

You probably tried to use a bytecode file from *one* version of Python 
with an interpreter of another version. Python actually checks the first 
four bytes of the .pyc file for a compatible "magic number" before 
accepting the file for execution.

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005          http://www.python.org/pycon/2005/
Steve Holden                           http://www.holdenweb.com/


From aisomurs at paju.oulu.fi  Fri Feb 18 10:12:13 2005
From: aisomurs at paju.oulu.fi (Antti Isomursu)
Date: 18 Feb 2005 07:12:13 -0800
Subject: How to save an image created from multiple images?
Message-ID: <b5f9523.0502180712.4489cdd1@posting.google.com>

Ok, this is my problem:

I have succesfully created an image by pasting smaller images into
area, created with canvas method:
>>> canvas = Canvas(win, width=canvasX, height=canvasY,
background='white')
""" Then I add images to picture using line below """
>>> canvas.create_image(ax, yy, anchor='nw', image=testi)

So, I got the image i wanted. How can I now save that picture as an
jpeg?


From rschroev_nospam_ml at fastmail.fm  Sat Feb 26 04:50:41 2005
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sat, 26 Feb 2005 09:50:41 GMT
Subject: netmask arithmetic?
In-Reply-To: <pan.2005.02.26.01.21.59.135616@dcs.nac.uci.edu>
References: <pan.2005.02.26.01.21.59.135616@dcs.nac.uci.edu>
Message-ID: <RDXTd.21126$2G7.2687044@phobos.telenet-ops.be>

Dan Stromberg wrote:
> Before I go and reinvent the wheel, does anyone already have python code
> that can do netmask arithmetic - for example, determining if a list of
> hostnames are on subnets described by a list of networks+netmasks like:
> 
> 128.200.34.0/24
> 128.195.16.128/25
> 
> ...and so on?

http://pynms.sourceforge.net/ipv4.html

-- 
"Codito ergo sum"
Roel Schroeven


From pyguy2 at gmail.com  Fri Feb 18 12:42:59 2005
From: pyguy2 at gmail.com (pyguy2 at gmail.com)
Date: 18 Feb 2005 09:42:59 -0800
Subject: low-end persistence strategies?
In-Reply-To: <7x7jl7g9sa.fsf@ruckus.brouhaha.com>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<Xns95FFF321AD909PaCmAnRDLM@212.27.42.70>
	<7xbrakjeu1.fsf@ruckus.brouhaha.com>
	<9sTQd.33120$XY5.31311@fe2.columbus.rr.com>
	<7x7jl7g9sa.fsf@ruckus.brouhaha.com>
Message-ID: <1108748578.980799.163740@l41g2000cwc.googlegroups.com>

You do not need to use a  24/7 process for low end persistance, if you
rely on the fact that only one thing can ever succeed in making a
directory. If haven't seen a filesystem where this isn't the case. This
type of locking works cross-thread/process whatever.

An example of that type of locking can be found at:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/252495

The only problem with this locking is if a process dies w/out cleaning
up the lock, how do you know when to remove them?
If you have the assumption that the write to the database is quick
(ok for low end), just have the locks time out after a minute. And if
you need to keep the lock longer, unpeel  appropriately and reassert
them.

With 2 lock directories, 2 files and 1 temporary file, you end up with
a hard to break system. The cost is disk space, which for low end
should be fine.

Basically, the interesting question is, how far can one,
cross-platform, actually go in building a persistence system with long
term process business.

john



From dbickett at gmail.com  Fri Feb 11 06:43:46 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Fri, 11 Feb 2005 06:43:46 -0500
Subject: [NooB] Using Escape Sesquences with Strings...
In-Reply-To: <614c778e.0502110329.2d4e7e73@posting.google.com>
References: <614c778e.0502110329.2d4e7e73@posting.google.com>
Message-ID: <1d6cdae305021103437ed56b6c@mail.gmail.com>

administrata wrote:
> print \trock

Your problem lies in this line. The escape sequence \t is not a
variable, so to speak. It is just that, an escape sequence, so it must
be located inside of a string:

print "\t" + rock

-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From simonwittber at gmail.com  Thu Feb  3 20:09:34 2005
From: simonwittber at gmail.com (Simon Wittber)
Date: Fri, 4 Feb 2005 09:09:34 +0800
Subject: OT: why are LAMP sites slow?
In-Reply-To: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
Message-ID: <4e4a11f80502031709cedcfe6@mail.gmail.com>

> I notice that lots of the medium-largish sites (from hobbyist BBS's to
> sites like Slashdot, Wikipedia, etc.)  built using this approach are
> painfully slow even using seriously powerful server hardware.

Slow is such an ambiguous term. Do you mean the pages are slow to
render in a browser, or slow to be fetched from the server, or the
server is slow to respond to requests? What is slow?


From xah at xahlee.org  Mon Feb  7 14:00:51 2005
From: xah at xahlee.org (Xah Lee)
Date: 7 Feb 2005 11:00:51 -0800
Subject: [perl-python] text pattern matching, and expressiveness
Message-ID: <1107802850.999843.260520@c13g2000cwb.googlegroups.com>

20050207 text pattern matching

# -*- coding: utf-8 -*-
# Python

# suppose you want to replace all strings of the form
# <img src="some.gif" width="30" height="20">
# to
# <img src="some.png" width="30" height="20">
# in your html files.

# you can use the "re" module.

import re

text = r'''<html>
blab blab
<P> look at this <img src="./some.gif" width="30" height="20"> pict
and this one <img class="float-right" src="../that.gif">, both are
beautiful, but also look: <img src ="my.gif">, and sequel
 <img src=
"girl.gif"> yeah! </p>
'''

new = re.sub(r'''src\s*=\s*"([^"]+)\.gif"''', r'''src="\1.png"''',
text)

print new

# the first argument to re.sub is a regex pattern.
# the second argument is the replacement string,
# which can contain captured pattern (the \1)
# the third argument is the text to be checked.
# an optional 4th argument is number of replacement
# to make. If ommitted, it replace all occurances of matches.

# see
# http://python.org/doc/lib/module-re.html

--------------------
# similar code in perl is s///. For example,
$text = "123";
$text =~ s/2/9/;
print $text;

----------------------
In languages human or computer, there's a notion of expressiveness.

English for example, is very expressive in manifestation, witness all
the poetry and implications and allusions and connotations and
dictions. There are a myriad ways to say one thing, fuzzy and warm and
all. But when we look at what things it can say, its power of
expression with respect to meaning, or its efficiency or precision, we
find natural languages incapable.

These can be felt thru several means. A sure way is thru logic,
linguistics, and or what's called Philosophy of Languages. One can also
glean directly the incapacity and inadequacy of natural languages by
studying the artificial language lojban, where one realizes, not only
are natural languages incapable in precision and lacking in efficiency,
but simply a huge number of things are near impossible to express thru
them.

One thing commonly misunderstood in computing industry is the notion of
expressiveness. If a language has a vocabulary of (smile, laugh, grin,
giggle, chuckle, guffaw, cackle), then that language will not be as
expressive, as a language with just (severe, slight, laugh, cry). The
former is "expressive" in terms of fluff, where the latter is
expressive with respect to meaning.

Similarly, in computer languages, expressiveness is significant with
respect to semantics, not syntactical variation.

These two contrasting ideas can be easily seen thru Perl vs Python
languages, and as one specific example of their text pattern matching
abilities.

Perl is a language of syntactical variegations. Python on the other
hand, does not even allow changes in code's indentation, but its
efficiency and power in expression, with respect to semantics (i.e.
algorithms), showcases Perl's poverty in specification.

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From fphsml at gmail.com  Fri Feb 11 02:27:17 2005
From: fphsml at gmail.com (James)
Date: 10 Feb 2005 23:27:17 -0800
Subject: goto, cls, wait commands
In-Reply-To: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
Message-ID: <1108106837.960891.235020@o13g2000cwo.googlegroups.com>

On Windows, I use WConio
http://newcenturycomputers.net/projects/wconio.html

It provides other screen functions you might have gotten used to in
QBasic as well.

On unix/cygwin, use curses.

I am not aware of any portable library though.
I used to use cls a lot in my QBasic days. Now I just don't.



From jfj at freemail.gr  Tue Feb  8 05:02:37 2005
From: jfj at freemail.gr (jfj)
Date: Tue, 08 Feb 2005 02:02:37 -0800
Subject: Confused with methods
In-Reply-To: <mailman.2115.1107815482.22381.python-list@python.org>
References: <mailman.2022.1107703890.22381.python-list@python.org>	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>	<slrnd0enor.26q.apardon@rcpc42.vub.ac.be>	<1grmd4z.1tlm4e61650vedN%aleaxit@yahoo.com>	<slrnd0f07t.26q.apardon@rcpc42.vub.ac.be>	<1grmg8s.17t7tj4180jdj6N%aleaxit@yahoo.com>	<mailman.2075.1107792148.22381.python-list@python.org>	<INednSf1ioDSOprfRVn-jg@comcast.com>
	<mailman.2115.1107815482.22381.python-list@python.org>
Message-ID: <42088E3D.2070107@freemail.gr>


I just realized that I'm trolling.

We all sometimes get into a trollwar despite our intensions
(even FL). So, I would like to apologize on behalf
of all those who participated in it. I'm sorry you had to witness
that.


jfj



From mzhangyh at yahoo.com  Fri Feb 18 15:22:25 2005
From: mzhangyh at yahoo.com (Michael Zhang)
Date: Fri, 18 Feb 2005 12:22:25 -0800 (PST)
Subject: help for xml parsing error
Message-ID: <20050218202226.76414.qmail@web53701.mail.yahoo.com>

Hi,

I got a strange error of my python program.  The
program is trying to load some data from server (also
built in Python).  the data is in xml format.  After
calling xml parser, I got the following error:

 File "ShowAll.py", line 156, in ?
    main(sys.argv)
  File "ShowAll.py", line 129, in main
    win = MainWindow()
  File "ShowAll.py", line 63, in __init__
    videoInfo =
CaMLDocumentParser.getVideoInfo(GenericParser.parse(StringIO(result)))
  File
"/home/vraid1/mzhang/CaMLServer3/lib/GenericParser.py",
line 39, in parse
    xml.sax.parse (file, g)
  File
"/usr/lib/python2.2/site-packages/_xmlplus/sax/__init__.py",
line 31, in parse
    parser.parse(filename_or_stream)
  File
"/usr/lib/python2.2/site-packages/_xmlplus/sax/expatreader.py",
line 109, in parse
    xmlreader.IncrementalParser.parse(self, source)
  File
"/usr/lib/python2.2/site-packages/_xmlplus/sax/xmlreader.py",
line 123, in parse
    self.feed(buffer)
  File
"/usr/lib/python2.2/site-packages/_xmlplus/sax/expatreader.py",
line 220, in feed
    self._err_handler.fatalError(exc)
  File
"/usr/lib/python2.2/site-packages/_xmlplus/sax/handler.py",
line 38, in fatalError
    raise exception
xml.sax._exceptions.SAXParseException: <unknown>:1:0:
not well-formed (invalid token)

PS. I have tried to view the content which should be
some text, but it prints some chars that not read to
human at all.

Thank you in advance,

Michael

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 


From http  Tue Feb 22 20:20:47 2005
From: http (Paul Rubin)
Date: 22 Feb 2005 17:20:47 -0800
Subject: basic tkinter/Windows question
References: <421BCED0.2070206@irl.cri.nz>
Message-ID: <7xwtt0ysuo.fsf@ruckus.brouhaha.com>

I find myself having to write some code on Windows :-(.  To alleviate
the pain, at least I get to use Python for some of it.

I'm trying to write a simple application, say "eggs.py".  It pops a
tkinter gui and lets the user do some stuff.  The system has Python
installed so I don't care about wrapping it in a .exe file or anything
like that.  But I'd like to make a desktop icon for eggs.py and let the
user double-click it and run the app without also getting a DOS box on
the screen.

Is there a simple way to do that?  I didn't see anything in the Python
docs about it.  I suspect that this is really a dumb Windows question,
but I avoid Windows whenever I can, so most anything I can ask about it
is probably dumb.

Thanks much.


From jacek.generowicz at cern.ch  Tue Feb  1 05:08:25 2005
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 01 Feb 2005 11:08:25 +0100
Subject: Python's idiom for function overloads
References: <mailman.1677.1107230965.22381.python-list@python.org>
	<41ff066c$0$6473$636a15ce@news.free.fr>
Message-ID: <tyfoef4mw2u.fsf@pcepsft001.cern.ch>

Philippe Fremy <phil at freehackers.org> writes:

> 	Hi Frans,
> 
> > Since Python doesn't have static typing, how is the same result as
> > traditional function overloads results in acheived?
> 
> 
> With dynamic typing obviously. :-)
> 
> You can not reproduce the C++ overload idiom

Of course you can. Use a multimethod of some sort.

The canonical answer to the OQ, of course, includes things like
"Consider whether you really want/need to do this" and "duck typing".

Frequently, in Python, code which checks for types, rather than
checking for features, ends up being excessively restrictive and
insufficiently general.


From apardon at forel.vub.ac.be  Tue Feb 15 03:27:13 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 15 Feb 2005 08:27:13 GMT
Subject: check if object is number
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
	<374ho0F560ughU1@individual.net>
	<66WdnbJbuf5yj5DfRVn-iA@comcast.com>
Message-ID: <slrnd13cj0.u1q.apardon@rcpc42.vub.ac.be>

Op 2005-02-11, Steven Bethard schreef <steven.bethard at gmail.com>:
> George Sakkis wrote:
>> "Steven Bethard" <steven.bethard at gmail.com> wrote in message
>> news:gcidnb9g_ojxnpDfRVn-tA at comcast.com...
>> 
>>>Is there a good way to determine if an object is a numeric type?
>> 
>> In your example, what does your application consider to be numeric?
>
> Well, here's the basic code:
>
> def f(max=None):
>      ...
>      while max is None or n <= max:
>          ...
>          # complicated incrementing of n
>
> So for 'max', technically all I need is <= support.  However, the code 
> also depends on the fact that after incrementing 'n' enough, it will 
> eventually exceed 'max'.  Currently, ints, longs, floats, and Decimals 
> will all meet this behavior.

Actually no, floats don't meet this behaviour or more specifically
floats don't guarantee this behaviour. It depends of course on
your implementation of f, but it is possible with floats to keep
incrementing and never reach a maximum.

-- 
Antoon Pardon


From kanenas at tcomcastd.tnet  Thu Feb 10 19:59:17 2005
From: kanenas at tcomcastd.tnet (Kanenas)
Date: Thu, 10 Feb 2005 16:59:17 -0800
Subject: deepcopy chokes with TypeError on dynamically assigned instance
	method
References: <698m01djeu9jqpnvvk64vmc488e5c026im@4ax.com>
Message-ID: <mn0o01hsaq59bg93cfoonej8ocjsnksgal@4ax.com>

On Thu, 10 Feb 2005 00:54:04 -0800, Kanenas <kanenas @t comcast d.t
net> wrote:

>When an instance has a dynamically assigned instance method, deepcopy
>throws a TypeError with the message "TypeError: instancemethod
>expected at least 2 arguments, got 0".  

I forgot to mention that the TypeError is thrown only when
constructing an instance from another instance in the same class, e.g.
Foo('bar') is fine but Foo(Foo('bar')) will fail.


From vibroverb at hotmail.com  Wed Feb 23 11:49:06 2005
From: vibroverb at hotmail.com (Deltones)
Date: 23 Feb 2005 08:49:06 -0800
Subject: Pythoncard - Mistake in walkthrough?
Message-ID: <e0f0f902.0502230849.3441e26a@posting.google.com>

Hi all,

I'm just getting into Python/wxPython/Pythoncard and I'm trying the
tutorial from this page:
http://pythoncard.sourceforge.net/walkthrough1.html

Is it me who's totally dense or there's some sort of confusion with
this tutorial?

Here's what is said in the tutorial:

Open the file starter1.py in your Python-aware editor of choice. The
Python script is, as you'd expect, brief and to the point. Here's the
important part to focus on:

def on_menuFileExit_select(self, event):
    pass


But here's the starter1.py code:

#!/usr/bin/python

from PythonCard import model

class Minimal(model.Background):
    pass

if __name__ == '__main__':
    app = model.Application(Minimal)
    app.MainLoop()


As you can see, the on_menu line is not in the starter1.py original
script, so I guessed that it should be a part of the Minimal class.

Then the tutorial ask me to replace the on_menu "pass" line with:

result = dialog.alertDialog(self, 'It works!', 'Showing Off')

but when you run the script, it runs, but clicking on Exit does not
display any dialog box. I did change the import line to include
dialog.

Is there something I'm not seeing here or there is really a mistake
with the walkthrough?

Thanks

Denis


From shoot at the.moon  Mon Feb 14 17:29:18 2005
From: shoot at the.moon (Steve Horsley)
Date: Mon, 14 Feb 2005 22:29:18 +0000
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <Xn86U7RhrLECFwD4@objmedia.demon.co.uk>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq1he$cd7$1@news1.ucsd.edu>
	<cuq5du$k7g$1@usenet.otenet.gr>
	<Xn86U7RhrLECFwD4@objmedia.demon.co.uk>
Message-ID: <cur8m5$g8h$1@news.freedom2surf.net>

Stephen Kellett wrote:
> In message <cuq5du$k7g$1 at usenet.otenet.gr>, Ilias Lazaridis 
> <ilias at lazaridis.com> writes
> 
>>>  And yet there is not one company that has someone devoted full-time 
>>> to  developing Python. Not even Guido.
>>
>>
>> Who's "Guido"?
> 
> 
> LOL Falling off my chair!!!!!!

I think the expression you are looking for is ROFL!


From noreply at python.org  Wed Feb  9 06:45:11 2005
From: noreply at python.org (The Post Office)
Date: Wed, 9 Feb 2005 12:45:11 +0100
Subject: MDaemon Warning - virus found: Returned mail: see transcript for
	details
Message-ID: <20050209114611.867091E4003@bag.python.org>


******************************* WARNING ******************************
Este mensaje ha sido analizado por MDaemon AntiVirus y ha encontrado 
un fichero anexo(s) infectado(s).  Por favor revise el reporte de abajo.

Attachment                    Virus name               Action taken
----------------------------------------------------------------------
Attachment.scr                Email-Worm.Win32.Mydoom.m Removed


**********************************************************************


Your message was undeliverable due to the following reason(s):

Your message was not delivered because the destination computer was
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a message is queued before it is returned depends on local configura-
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Most likely there is a network problem that prevented delivery, but
it is also possible that the computer is turned off, or does not
have a mail system running right now.

Your message was not delivered within 6 days:
Host 9.219.64.136 is not responding.

The following recipients did not receive this message:
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Please reply to postmaster at python.org
if you feel this message to be in error.


From janeaustine50 at hotmail.com  Tue Feb 22 22:03:54 2005
From: janeaustine50 at hotmail.com (janeaustine50 at hotmail.com)
Date: 22 Feb 2005 19:03:54 -0800
Subject: Style guide for subclassing built-in types?
In-Reply-To: <ba1e306f.0502221846.70cb4d5c@posting.google.com>
References: <ba1e306f.0502221846.70cb4d5c@posting.google.com>
Message-ID: <1109127834.660822.247120@g14g2000cwa.googlegroups.com>

Jane Austine wrote:
> Please see the following code:
> --------------------------------
> class rev_wrap(object):
>     def __init__(self,l):
>         self.l=l
>     def __getitem__(self,i):
>         return self.l[-i-1]
>
> class rev_subclass(list):
>     def __getitem__(self,i):
>         return list.__getitem__(self,-i-1)
>
> if __name__=='__main__':
>     l=rev_wrap([1,2,3])
>     assert l[0]==3
>     assert list(l)==[3,2,1]
>
>     l=rev_subclass([1,2,3])
>     assert l[0]==3
>     assert list(l)==[3,2,1]

Oh... I forgot one. assert l==[3,2,1] at this point doesn't pass
either. "print l" outputs the wrong one([1,2,3]) as well.



From http  Thu Feb 24 22:05:24 2005
From: http (Paul Rubin)
Date: 24 Feb 2005 19:05:24 -0800
Subject: web status display for long running program
References: <509534af.0502241737.5f62992@posting.google.com>
Message-ID: <7xll9d2vbf.fsf@ruckus.brouhaha.com>

brian at mirror.org (Brian Roberts) writes:
> - I don't want to embed a full web server into the application or
> require any special PC setup.

That's not a big deal, just use the standard library's http server class.

> - I think I know how to listen on a socket, but not sure how to send
> stuff to to a web browser -- just start with <HTML>?  Or like a CGI
> script with the header stuff like text/html?  (I don't care if I have
> to write the HTML by hand or can use a toolkit -- not important).

You'd have to send a full http response, but the http server class
does some of it for you.

> - Do I need a separate thread to listen and send the HTML?  The
> application is currently single threaded.  I'm confortable with
> threads, but would prefer to avoid them if possible.

Separate thread is the obvious way to do it.  


From fperez.net at gmail.com  Sat Feb 12 17:52:09 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Sat, 12 Feb 2005 15:52:09 -0700
Subject: Hack with os.walk()
References: <200502120000.12086.frans.englich@telia.com>
	<culqu5$582$1@sea.gmane.org>
Message-ID: <cum17a$c7m$1@sea.gmane.org>

Michael Spencer wrote:

> The path module by Jorendorff: http://www.jorendorff.com/articles/python/path/
> 
> wraps various os functions into an interface that can make this sort of thing
> cleaner

Wow, many thanks for the pointer.  This has to be one of the single most useful
small python modules out there, and it seems to address (from reading the docs)
most of the things that annoy the hell out of me when doing filesystem
scripting in python.

I've always felt that filesystem-related scripting, in python, is unnecessarily
complicated.  It is perhaps the only part of the stdlib (note: I don't claim to
have used it all) which positively, unfailingly, manages to piss me off every
time I use it.

The main problem is that things which are conceptually related, are scattered
all over the stdlib.  Do you know, off the top of your head, whether a
file-related function is in os, os.path, shutil, glob, dircache, etc?  I've
actually considered writing a PEP requesting this, but such an effort would
obviously mean writing an implementation.  Not hard, but I just don't have the
time for it.

Perhaps this path.py could be considered for inclusion in the stdlib?  I've only
read the page linked above, so perhaps it can use some polishing.  But it
certainly looks like a big improvement over the scatterblast which the stdlib
is on this particular topic.

Best,

f



From rigga at hasnomail.com  Wed Feb 16 14:05:35 2005
From: rigga at hasnomail.com (Rigga)
Date: Wed, 16 Feb 2005 19:05:35 GMT
Subject: How can I Fill in web form and post back
References: <LJtQd.2010133$B07.305765@news.easynews.com>
	<mailman.2655.1108504446.22381.python-list@python.org>
Message-ID: <3QMQd.2109818$B07.322065@news.easynews.com>

Joe Francia wrote:

> Rigga wrote:
>> Hi,
>> 
>> I am looking for the best way to use Python to get a web page, look for
>> some particular fields on a form, fill in the fields and submit the form
>> but I have no idea where to start - any pointers appreciated
>> 
>> many thanks
>> 
>> Rigga
> 
> Here's a pretty good resource:
> http://www.google.com/search?q=python+fill+web+forms
> 
Thanks but I already checked there and didnt come up with much


From michele.simionato at gmail.com  Fri Feb 18 10:57:21 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 18 Feb 2005 07:57:21 -0800
Subject: low-end persistence strategies?
In-Reply-To: <mailman.2798.1108737792.22381.python-list@python.org>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<mailman.2735.1108616299.22381.python-list@python.org>
	<1108622622.119311.43200@f14g2000cwb.googlegroups.com>
	<mailman.2746.1108629315.22381.python-list@python.org>
	<1108629775.800508.3400@f14g2000cwb.googlegroups.com>
	<mailman.2777.1108674138.22381.python-list@python.org>
	<1108702957.327528.22010@z14g2000cwz.googlegroups.com>
	<mailman.2790.1108704152.22381.python-list@python.org>
	<1108707658.105102.298300@z14g2000cwz.googlegroups.com>
	<mailman.2798.1108737792.22381.python-list@python.org>
Message-ID: <1108742241.070703.197260@z14g2000cwz.googlegroups.com>

Uhm ... I reading /usr/src/linux-2.4.27/Documentation/mandatory.txt
The last section says:

"""
6. Warning!
-----------

Not even root can override a mandatory lock, so runaway processes can
wreak
havoc if they lock crucial files. The way around it is to change the
file
permissions (remove the setgid bit) before trying to read or write to
it.
Of course, that might be a bit tricky if the system is hung :-(
"""

so lockf locks do not look completely harmless ...

      Michele Simionato



From maxerickson at gmail.com  Thu Feb 17 10:06:31 2005
From: maxerickson at gmail.com (Max  Erickson)
Date: 17 Feb 2005 07:06:31 -0800
Subject: os.walk()
References: <cv29o3$ror$1@solaris.cc.vt.edu>
Message-ID: <1108652791.298787.26720@o13g2000cwo.googlegroups.com>

<snip>

os.walk() is a generator. When you iterate over it, like in a for loop,
as
for r,ds,fs in os.walk(...):
r, ds and fs are set to new values at the beginning of each iteration.
If you want to end up with a list of files or dirs, rather than
processing them in the bodies of the file and dir for loops, you need
to keep a list of the files and dirs that os.walk gives you:

>>> import os
>>> dir_skip_list = ['sub2']
>>> file_skip_list = []
>>> keptfiles = list()
>>> keptdirs = list()
>>> for root, ds, fs in os.walk('c:\\bin\\gtest\\'):
	for f in fs:
		if f not in file_skip_list:
			keptfiles.append(f)
	for d in ds:
		if d in dir_skip_list:
			ds.remove(d)
		else:
			keptdirs.append(d)


>>> keptfiles
['P4064013.JPG', 'P4064015.JPG', 'Thumbs.db', 'P4064060.JPG',
'P4064061.JPG', 'Thumbs.db', 'PC030088.JPG', 'P4224133.JPG',
'Thumbs.db']
>>> keptdirs
['sub1', 'sub5', 'sub6']

There is something going on above that I don't quite understand, there
should be more directories, so if you can't get something working with
that, this gives you lists of files and dirs that you can then filter:

>>> keptfiles = list()
>>> keptdirs = list()
>>> for r, ds, fs in os.walk('c:\\bin\\gtest'):
	keptfiles.extend(fs)
	keptdirs.extend(ds)

>>> keptfiles
['P4064013.JPG', 'P4064015.JPG', 'Thumbs.db', 'P4064026.JPG',
'Thumbs.db', 'Thumbs.db', 'Thumbs.db', 'P4064034.JPG', 'Thumbs.db',
'P3123878.JPG', 'P4064065.JPG', 'Thumbs.db', 'P4064060.JPG',
'P4064061.JPG', 'Thumbs.db', 'PC030088.JPG', 'P4224133.JPG',
'Thumbs.db']
>>> keptdirs
['sub1', 'sub2', 'sub3', 'sub5', 'sub6', 'sub8', 'SubA', 'sub9',
'sub6']
>>> #filter away...

Hope this helps, 
max



From administrata at hotmail.com  Fri Feb 11 17:21:25 2005
From: administrata at hotmail.com (administrata)
Date: 11 Feb 2005 14:21:25 -0800
Subject: [NooB] Using Escape Sesquences with Strings...
References: <614c778e.0502110329.2d4e7e73@posting.google.com>
	<420cbe89$0$526$636a15ce@news.free.fr>
Message-ID: <614c778e.0502111421.7747db01@posting.google.com>

bruno modulix <onurb at xiludom.gro> wrote in message news:<420cbe89$0$526$636a15ce at news.free.fr>...
> administrata wrote:
> > Hello! :)
> > I've reading 'Python Programmin for the Absolute beginner'.
> > I got questions which is...
> > 
> > print "\t - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "
> > 
> > rock = """
> > Igneous          Sedimentary          Metamorphic
> > 
> > Lava             Grains               Marble
> > Ramdom crystals  Layer                Bands
> > Granite          Salt                 Schist
> > Intrusive        Weathering           Heat + Pressure
> >                  Deposition           Change"""
> > print \trock
> > 
> > print "\t - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "
> > 
> > error occurs!
> > 
> > I don't know how to \t The variable.
> 
> see Daniel's answer for the why.
> Now for the how, I guess you want a tab on each line so you have two 
> solutions :
> 1/ putting the tabs in the string:
> rock = """
> \tIgneous          Sedimentary          Metamorphic
> 
> \tLava             Grains               Marble
> \tRamdom crystals  Layer                Bands
> \tGranite          Salt                 Schist
> \tIntrusive        Weathering           Heat + Pressure
> \t                 Deposition           Change"""
> 
> print rock
> 
> 2/ adding the tabs before printing:
> rock = """
> Igneous          Sedimentary          Metamorphic
> 
> Lava             Grains               Marble
> Ramdom crystals  Layer                Bands
> Granite          Salt                 Schist
> Intrusive        Weathering           Heat + Pressure
>                   Deposition           Change"""
> 
> 
> for line in rock.split("\n"):
>    print "\t%s" % line
> 
> HTH,

thx 4 your helpful msg.

I'll input 1 instead of 2 which is a bit complicated for me.


From pu.news.001 at gmail.com  Sat Feb 26 17:57:00 2005
From: pu.news.001 at gmail.com (Patrick Useldinger)
Date: Sat, 26 Feb 2005 23:57:00 +0100
Subject: fdups: calling for beta testers
In-Reply-To: <cvqksu$25it$1@news.comcor-tv.ru>
References: <421f97eb$1@news.vo.lu>
	<1109380525.262724.275780@g14g2000cwa.googlegroups.com>
	<422044b9$1@news.vo.lu> <AaidnagE7Yd2Lb3fRVn-qg@powergate.ca>
	<cvqksu$25it$1@news.comcor-tv.ru>
Message-ID: <4220febd$1@news.vo.lu>

Serge Orlov wrote:

> Or use exemaker, which IMHO is the best way to handle this
> problem.

Looks good, but I do not use Windows.

-pu


From grante at visi.com  Thu Feb 10 23:31:27 2005
From: grante at visi.com (Grant Edwards)
Date: 11 Feb 2005 04:31:27 GMT
Subject: Loading functions from a file during run-time
References: <1108091598.055004.24890@g14g2000cwa.googlegroups.com>
Message-ID: <420c351f$0$29514$a1866201@visi.com>

On 2005-02-11, Bryant Huang <735115 at gmail.com> wrote:

> I would like to read in files, during run-time, which contain
> plain Python function definitions, and then call those
> functions by their string name. In other words, I'd like to
> read in arbitrary files with function definitions, using a
> typical 'open()' call, but then have those functions available
> for use.

that's pretty simple:

  $ cat foo.txt
  def foo():
      print "foo here"
  def bar():
      print "bar here"
      
  $ cat foo.py
  filename = 'foo.txt'
  execfile(filename)
  foo()
  bar()
  
  $ python foo.py
  foo here
  bar here

> The 'import' keyword is not appropriate, AFAIK, because I want to be
> able to open any file, not one that I know ahead of time (and thus can
> import at design-time).

This will import a module name determined at run-time:

  exec('import %s' % moduleName)

> The following is a toy example of what I'm doing so far.

[...]

> I'm not sure exactly what happens below the surface, but I'm
> guessing the 'compile()' and 'exec()' commands load in
> 'negate()' and 'square()' as functions in the global scope of
> 'foo.py'. I find that when I run 'compile()' and 'exec()' from
> within a function, say 'f()', the functions I read in from
> 'bar.txt' are no longer accessible since they are in global
> scope, and not in the scope of 'f()'.

Huh?  I'm lost.  What, exactly, are you trying to accomplish?

Did your example program do what you intended or not?

Is this what you're trying to do?

  $ cat foo.txt
  def foo():
      print "foo here"
  def bar():
      print "bar here"
  
  $ cat bar.py
  def testing():
      filename = 'foo.txt'
      execfile(filename,globals())
      foo()
      bar()
  testing()    
  foo()    
  bar()
  
  $ python bar.py
  foo here
  bar here
  foo here
  bar here

-- 
Grant Edwards                   grante             Yow!  Clear the
                                  at               laundromat!! This
                               visi.com            whirl-o-matic just had a
                                                   nuclear meltdown!!


From steve at holdenweb.com  Sat Feb  5 08:12:30 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 05 Feb 2005 08:12:30 -0500
Subject: An interesting python problem using Zope 2.7.3
In-Reply-To: <2f00792c.0502050253.d8f1997@posting.google.com>
References: <2f00792c.0502050253.d8f1997@posting.google.com>
Message-ID: <jI3Nd.103626$Jk5.64256@lakeread01>

ranjith g p wrote:

> Greetings!!!
> 
> I ran the following simple string commands in Linux + Python and the results are:
> 
> [root at localhost root]# python
> Python 2.2.2 (#1, Feb 24 2003, 19:13:11)
> [GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-4)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> 
>>>>"<a>A"
> 
> '<a>A'
> 
>>>>"<a>A/"
> 
> '<a>A/'
> 
>>>>"A</>"
> 
> 'A</>'
> 
> 
> 
> Now when the same is run from Zope273 + python + Linux or windows,
> the results are,
> 
> 1.  '<a>A'
> 2.   A/
> 3.  A    
>  
> 
> respectively. Any suggestions?
> 
> thanx

Define "is run from"?

When you enter an expression-statement at the interpreter's interactive 
prompt the interpreter computers the result and, if the result is not 
None, prints its repr().

How are you getting Zope to print the results? If they are coming 
through a web browser, for example, there will be obvious difficulties 
with unquoted "<" and ">" characters,

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From pobrien at orbtech.com  Mon Feb 14 13:21:09 2005
From: pobrien at orbtech.com (Pat)
Date: 14 Feb 2005 10:21:09 -0800
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <37c1cgF35vfuvU1@individual.net>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<4210a434$0$23451$626a14ce@news.free.fr>
	<mailman.2539.1108397140.22381.python-list@python.org>
	<37c1cgF35vfuvU1@individual.net>
Message-ID: <1108405269.472669.172070@o13g2000cwo.googlegroups.com>

So what if someone appears to be a troll?  Suck it up and rise above
it.  This thread started with legitimate questions. Unfortunately,
almost every response has been dismissive, petty, and a complete waste
of time and effort.  Please respond to the issue or simply ignore it.
The issue is real and I'd like to find a solution to it as well.  Right
now it feels like I'm in the company of a bunch of hell-bent school
bullies.  I'm ashamed of the behavior I'm witnessing on this list.

--
Patrick K. O'Brien
Orbtech    http://www.orbtech.com
Schevo     http://www.schevo.org
Pypersyst  http://www.pypersyst.org



From cpl.19.ghum at spamgourmet.com  Mon Feb  7 12:50:52 2005
From: cpl.19.ghum at spamgourmet.com (Harald Massa)
Date: Mon, 7 Feb 2005 17:50:52 +0000 (UTC)
Subject: overwriting method in baseclass
References: <Xns95F64CD37EEF7cpl19ghumspamgourmet@195.20.224.116>
	<420791a7$0$17127$626a14ce@news.free.fr>
Message-ID: <Xns95F6BFBF27210cpl19ghumspamgourmet@195.20.224.116>

bruno modulix <onurb at xiludom.gro> wrote in
> 
>> So, what is the most elegant solution to administer these changes? 
> 
> <ot>
> Use a version control system (svn is quite fine...).
> </ot>

Thanks for that recommendation, I really do use subversion for some time. 
But how can I use it to solve this problem? I do changes to the common 
baseclass which is OUTSIDE my development. I quite correctly assume that 
the developers of the classlib also use Subversion, alas, having no public 
access.

So HOW can SVN be of any use for THIS prob?

Harald


From P at draigBrady.com  Tue Feb  8 08:13:27 2005
From: P at draigBrady.com (P at draigBrady.com)
Date: Tue, 08 Feb 2005 13:13:27 +0000
Subject: python connect to server using SSH protocol
In-Reply-To: <1107850655.289129.94880@o13g2000cwo.googlegroups.com>
References: <1107850655.289129.94880@o13g2000cwo.googlegroups.com>
Message-ID: <4208BAF7.8010907@draigBrady.com>

ajikoe at gmail.com wrote:
> How can python connect to server which use SSH protocol?
> Is it easy since my python has to run third party vendor, write data,
> read data inside the server (supercomputer).
> 
> Any suggestion?

you can use popen around the ssh binary.
You man need the pty module if you want to deal with password prompts
If you want lower level control, use the twisted module.

-- 
P?draig Brady - http://www.pixelbeat.org
--


From jacek.generowicz at cern.ch  Tue Feb  1 06:22:42 2005
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 01 Feb 2005 12:22:42 +0100
Subject: Python's idiom for function overloads
References: <mailman.1677.1107230965.22381.python-list@python.org>
	<41ff066c$0$6473$636a15ce@news.free.fr>
	<tyfoef4mw2u.fsf@pcepsft001.cern.ch>
	<41ff63bb$0$21348$636a15ce@news.free.fr>
Message-ID: <tyf7jlsmsn1.fsf@pcepsft001.cern.ch>

Philippe Fremy <phil at freehackers.org> writes:

> Enforcing types also brings the benefit that the program is more
> deterministic. In my experience, there is a lot more benefits to have
> an object whose type is clearly identified than to have function that
> accepts generic objects.
> 
> 
> I would go as far as saying that variables should have immutable
> types.

If you really believe this, then I would go as far as saying that you
would be happier in a language other than Python.

> It is more restricting that what python provides currently, but
> leads to clearer programming practice: the intent of the developer
> shows up in the type he uses.

Not in my opinion or experience.

To each his own, and vice versa.


From gabriel.barros at gmail.com  Sat Feb 12 19:41:04 2005
From: gabriel.barros at gmail.com (Gabriel B.)
Date: Sat, 12 Feb 2005 16:41:04 -0800
Subject: Why Tk treat F10, F11, F12 diferently from F1...F9?
Message-ID: <5175a81c05021216415204de93@mail.gmail.com>

This is completely odd to me...

# Bind F1...F12 to <<TabKeys>>
self.tk.event_add( '<<TabKeys>>', # keys used to switch between the tabs 
	'<KeyPress-F1>','<KeyPress-F2>','<KeyPress-F3>','<KeyPress-F4>','<KeyPress-F5>',
	'<KeyPress-F6>','<KeyPress-F7>','<KeyPress-F8>','<KeyPress-F9>','<KeyPress-F10>',
	'<KeyPress-F11>','<KeyPress-F12>'
)

self.master.bind_all('<<TabKeys>>', self.__functionKeysPressed )

def __functionKeysPressed(self, event):
	print event.keysym


Now, i run the program and press from F1 to F12, and i get:
F1
F2
F3
F4
F5
F6
F7
F8
F9
L1
L2


F10 simply does nothing!
F11 prints L1
F12 prints L2

The only place google takes is not very elucidating :)
http://64.233.161.104/search?q=cache:t2CnLTHob0sJ:stuff.mit.edu/afs/sipb/project/tcl/linuxbin/dpwish+tk+bind+F12%7CF11+L1%7CL2&hl=fr

Anyone has any ideia why is that?
I surely didn't mind about this if it wasn't for F10 showing nothing.
I get the return code just to use the same function (and same biding)
for the 12 buttons since i can't pass arguments to the Command option
in tk. ...And i'm already considering adding a L1 and L2 check instead
of F11 and F12 and a 'empty' check for the F10... But that would be
plain ugly.

Thanks,
Gabriel


From vincent at visualtrans.de  Sat Feb 12 02:21:49 2005
From: vincent at visualtrans.de (vincent wehren)
Date: Sat, 12 Feb 2005 08:21:49 +0100
Subject: connecting to Sybase/MsSQL from python
References: <OJcPd.4065$aW6.3986@newssvr22.news.prodigy.net>
Message-ID: <cukaod$ukt$1@news5.zwoll1.ov.home.nl>


"John Fabiani" <jfabiani at yolo.com> schrieb im Newsbeitrag 
news:OJcPd.4065$aW6.3986 at newssvr22.news.prodigy.net...
> Hi,
> I'm hoping someone on the list has connected to sybase/MsSQL with 
> something
> that works with DBAPI 2.0 from a linux box (SUSE 9.2) because I can't seem
> to get it done.  I found Object Craft's python code that uses FreeTDS. 
> But
> I can't get it compiled.  The code is looking for "sybdb.h" (first 
> error) -
> of course I don't have "sybdb.h".  It is not in Object Crafts code nor in
> the FreeTDS source.  I'm guessing that I need sybase develop lib's but I
> don't know where they are to be found.
>
> So is there a kind sole out there that can help with instructions on what 
> is
> needed to get python talking to MsSQL.
>
> jOHN

Use mxODBC?

--

Vincent Wehren




From mmokrejs at ribosome.natur.cuni.cz  Mon Feb 14 12:01:45 2005
From: mmokrejs at ribosome.natur.cuni.cz (=?ISO-8859-2?Q?Martin_MOKREJ=A9?=)
Date: Mon, 14 Feb 2005 18:01:45 +0100
Subject: ValueError: invalid literal for int(): 1.0000000000e+00
Message-ID: <4210D979.4000709@ribosome.natur.cuni.cz>

Hi,
  is this a bug or "feature" that I have to use float() to make int() autoconvert
from it?

$ python
Python 2.3.4 (#1, Feb 14 2005, 10:00:27) 
[GCC 3.3.5  (Gentoo Linux 3.3.5-r1, ssp-3.3.2-3, pie-8.7.7.1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> a = 1
>>> "%5.10e" % (a)
'1.0000000000e+00'
>>> int("%5.10e" % (a))
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: invalid literal for int(): 1.0000000000e+00
>>> int(float("%5.10e" % (a)))
1
>>> 


From danb_83 at yahoo.com  Sun Feb 13 07:55:36 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 13 Feb 2005 04:55:36 -0800
Subject: For American numbers
References: <420e7376$1@nntp0.pdx.net><gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
	<slrnd0u8fd.c2l.nick@irishsea.home.craig-wood.com>
Message-ID: <1108299336.079209.275420@c13g2000cwb.googlegroups.com>

Nick Craig-Wood wrote:
> Peter Hansen <peter at engcorp.com> wrote:
> >  Only for hard drive manufacturers, perhaps.
> >
> >  For the rest of the computer world, unless I've missed
> >  a changing of the guard or something, "kilo" is 1024
> >  and "mega" is 1024*1024 and so forth...
>
> Yes.  Unless you work in the telcoms industry, where, for example if
> you order a 2 Mbit/s line you'll get
>
>   2 * 1024 * 1000 bits / s

They must have gotten the idea from floppy disks, which also use a
1024000-byte "megabyte".



From martin.sand.christensen at gmail.com  Thu Feb 17 11:40:29 2005
From: martin.sand.christensen at gmail.com (Martin Christensen)
Date: Thu, 17 Feb 2005 17:40:29 +0100
Subject: newbie question - iterating through dictionary object
References: <1108656866.128912.109800@f14g2000cwb.googlegroups.com>
Message-ID: <87650rywaq.fsf@gmail.com>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

>>>>> "Miranda" == mirandacascade  <mirandacascade at yahoo.com> writes:
Miranda> 1) Is there any advantage to use the
Miranda> y = a.keys()
Miranda> for z in y:

While you're at it, you could save y altogether and just use

for z in a.keys():
    ...

Miranda> looping technique rather than the
Miranda> for x in a:
Miranda> looping technique?

I certainly don't see any advatages.

Miranda> 2) What are the tradeoffs for using each of the techniques?

'for x in a:' is prettier to look at. :-) As you can see, it's also
slightly faster (at least for very small dictionaries), but unless
you're doing a _lot_ of them, it won't matter.

% python2.4 -m timeit -c "a = {1:1, 2:2, 3:3, 4:4, 5:5}" "for x in a: pass"
1000000 loops, best of 3: 1.63 usec per loop
% python2.4 -m timeit -c "a = {1:1, 2:2, 3:3, 4:4, 5:5}" "for x in a.keys(): pass"
100000 loops, best of 3: 2.1 usec per loop


Martin

- -- 
Homepage:       http://www.cs.auc.dk/~factotum/
GPG public key: http://www.cs.auc.dk/~factotum/gpgkey.txt
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.5 (GNU/Linux)
Comment: Using Mailcrypt+GnuPG <http://www.gnupg.org>

iEYEARECAAYFAkIUyPwACgkQYu1fMmOQldWV8ACdEZOgwwtOyp7c+hDVtQe+0LX1
yRoAoITJGZA6zA0iE9G4lp2cP/GinlZC
=njlP
-----END PGP SIGNATURE-----


From http  Thu Feb  3 21:54:13 2005
From: http (Paul Rubin)
Date: 03 Feb 2005 18:54:13 -0800
Subject: [Fwd: [gnu.org #220719] Re: python and gpl]
References: <mailman.1861.1107484943.22381.python-list@python.org>
Message-ID: <7x3bwdkpbe.fsf@ruckus.brouhaha.com>

Tim Churches <tchur at optushome.com.au> writes:
> See also this article, in which Lawrence Rosen, the attorney for
> OSI, admits that it is impossible for anyone to properly interpret
> the application of various open source licenses under the various
> national laws: http://www.devx.com/opensource/Article/27171
> 
> I suspect that this issue applies equally to the FSF.

Correct.  Neither a GPL compliance engineer, the FSF's legal counsel,
an attorney for OSI, a defendant or potential defendant, or anyone
else except a judge presiding over a court of law having jurisdiction
over an actual case or controversy involving the license, can
interpret the application of a license under the law in a legally
binding way.

The FSF is sticking to its guns and has not yet had to drag anyone
before an actual judge to get the matter decided.  Various possible
candidates for such dragging have apparently decided that their
chances weren't too good.

As for the copying-from-disk doctrine, that's purely guesswork on my
part.  The FSF has not publicly disclosed its legal strategy for if
and when a case comes up.


From paddy3118 at netscape.net  Sat Feb 19 10:49:30 2005
From: paddy3118 at netscape.net (Paddy)
Date: 19 Feb 2005 07:49:30 -0800
Subject: On eval and its substitution of globals
Message-ID: <1108828170.372593.150790@g14g2000cwa.googlegroups.com>

Hi,
I got tripped up on the way eval works with respect to modules and
so wrote a test.

It seems that a function carries around knowledge of the globals()
present
when it was defined. (The .func_globals attribute)?

When evaluated using eval(...) the embedded globals can be overridden
with
the one passed through the eval(...) call

If however you create a new function that calls the first then eval's
global argument is only substituted in the outer call!

TEST:
=====

Python 2.4 (#2, Jan  8 2005, 20:18:03)
[GCC 3.3.5 (Debian 1:3.3.5-5)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> globals().has_key('A')
False
>>> globals().has_key('B')
False
>>> def f1(): return A < B
...
>>> def z(): return f1()
...
>>> eval(f1.func_code,dict(A=1,B=2))
True
>>> eval(z.func_code,dict(A=1,B=2, f1=f1))
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 1, in z
  File "<stdin>", line 1, in f1
NameError: global name 'A' is not defined
>>>

ENDTEST
=======

Is there a way to do a deep substitution of the globals?

I should add that f1 is given as-is. I can modify z,
and f1 is just one of many functions given and function z
is some boolean function of the f<n>'s


Thanks, Pad.



From gmane-schpam at joefrancia.com  Wed Feb  9 23:09:54 2005
From: gmane-schpam at joefrancia.com (Joe Francia)
Date: Wed, 09 Feb 2005 23:09:54 -0500
Subject: Python and version control
In-Reply-To: <MPG.1c74478bc8221768989695@news2.atlantic.net>
References: <XNrOd.1657$Mw3.72@amstwist00>	<mailman.2266.1107978884.22381.python-list@python.org>
	<MPG.1c74478bc8221768989695@news2.atlantic.net>
Message-ID: <cuemnc$33t$1@sea.gmane.org>

Chris wrote:
> 
> Hi Joe,
> 
> I'm curious. Why do you only use Eclipse for big projects? 

Habit, mainly; plus it's easier for one-offs and single-file scripts to 
just right-click a file in Explorer and "Edit with ScITE" and work from 
there.  And to further complicate matters, when in FreeBSD or Linux, 
Eric3 and Kate fill the same roles as Eclipse and SciTE in Windows-land.

Peace,
Joe
--
Soraia - http://www.soraia.com



From mefjr75 at hotmail.com  Fri Feb  4 00:03:39 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 3 Feb 2005 21:03:39 -0800
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
	<7xy8e5jagh.fsf@ruckus.brouhaha.com>
Message-ID: <1107490117.881310.167010@f14g2000cwb.googlegroups.com>

Paul Rubin wrote:
> Yes, good point about html tables, though I'm concerned primarily
> about server response.  (It's off-topic, but how do you use CSS to
get
> the effect of tables?)
To emulate a table you use the div and span tag.
(really you can do just about anything with div and span)
Div is a block level tag and span isn't.
You can also group them  together and nest them.
div and span have little meaning but the can be styled.
In the CSS declaration we create styles and then just use them later as
needed.
Try to always focus on layout first and actual style later. (CSS is all
about seperation of concerns)
You will find the verbosity of CSS is not as annoying as you might
think it might be, it is quite easy to learn and well worth the effort.
Ok here is a bad example ( do a search on Google for CSS tables ).
( this was torn out of a webapp I am working on )
.<div class='panel'>
.  <div class="archivehead"><strong>
.    <span class="leftspace">Archive</span>
.    <span class="rightspace">Entry Date</span>
.    </strong>
.  </div>
.      <div class="archivelite">
.        <span class="bold">%s</span><span>
.        <strong>%s</strong>
.        </span><span class="right">%s</span>
.      </div>
.      <div class="archivedark">
.        &nbsp &nbsp &nbsp &nbsp posted by: %s
.        <span class="right">
.        <strong>text </strong>
.        <strong> %s</strong>
.        </span>
.      </div>
.</div>
And here is some of the CSS
( these are classes the dot in front of the name tells you that, when
combined with div or span just about anything is possible. )
.  .panel {
.        border: solid thin #666677;
.        margin: 2em 4em 2em 4em;}
.  .leftspaces {
.        letter-spacing:.5em;
.        text-decoration:none;
.        color:#EEEEff;}
.  .rightspaces {
.        letter-spacing:.5em;
.        position: absolute;
.        right: 5em;
.        text-decoration: none;
.        color:#EEEEff;}
.
.  .archivehead {
.         text-indent:.5em;
.         background-color:#333333;}
.  .archivelite {
.         color:#777777;
.         text-indent:.5em;
.         background-color:#222222;}
.  .archivedark {
.         color:#777777; text-indent:.5em;
.         background-color:#111111;}
.  .archivelite a{
.         color:#BBBBDD;
.         text-decortation:none;
.         background-color:#222222;}
.  .archivedark a{
.         color:#BBBBDD;
.         text-decortation:none;
.         background-color:#111111;}
hth,
M.E.Farmer



From deetsNOSPAM at web.de  Wed Feb  2 13:48:47 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 02 Feb 2005 19:48:47 +0100
Subject: XML with Unicode: what am I doing wrong?
References: <mailman.1767.1107368240.22381.python-list@python.org>
Message-ID: <ctr7ae$ioj$03$1@news.t-online.com>

> I started out working in the context of elementtidy, but now I am
> running into trouble in general Python-XML areas, so I thought I'd toss
> the question out here. The code below is fairly self-explanatory. I have
> a small HTML snippet that is UTF-8 encoded and is not 7-bit ASCII
> compatible. I use Tidy to convert it to XHTML, and this particular setup
> returns a unicode instance rather than a string.
> 
> import _elementtidy as et
> from xml.parsers import expat
> 
> data = unicode(open("snippetWithUnicode.html").read(), "utf-8")
> html = et.fixup(data)[0]
> parser = expat.ParserCreate()
> parser.Parse(html)
> 
> UnicodeEncodeError: 'ascii' codec can't encode character '\ub5' in
> position 542: ordinal not in range(128)
> 
> If I set my default encoding to utf8 in sitecustomize.py, it works just
> fine. I'm thinking that I can't be the only one trying to pass unicode
> to expat... Is there something else I need to do here?

you confuse unicode with utf8. Expat can parse the latter - the former is
internal to python. And passing it to something that needs a string will
result in a conversion - which fails because of the ascii encoding.

Do this:

parser.Parse(html.encode('utf-8'))

-- 
Regards,

Diez B. Roggisch


From gabriel.cooper at mediapulse.com  Wed Feb  2 13:43:52 2005
From: gabriel.cooper at mediapulse.com (Gabriel Cooper)
Date: Wed, 02 Feb 2005 13:43:52 -0500
Subject: Remove HTML tags (except anchor tag) from a string using regular
 expressions
In-Reply-To: <41FF8B56.5020109@mxm.dk>
References: <mailman.1687.1107259469.22381.python-list@python.org>
	<41FF8B56.5020109@mxm.dk>
Message-ID: <42011F68.80602@mediapulse.com>


Max M wrote:

> If it's not to learn, and you simply want it to work, try out this 
> library:
>
> http://zope.org/Members/chrisw/StripOGram/readme
>
>
 >>> stripogram.html2safehtml('''first > last''',valid_tags=('i','a','br'))
'first > last'
 >>> stripogram.html2safehtml('''first < last''',valid_tags=('i','a','br'))
'first first '


keeping in mind that bare ">" and "<" are invalid HTML (should be &gt; 
and &lt;), why'd it leave the greater than and why are there two "first"'s ?


From martin at v.loewis.de  Thu Feb 24 10:12:24 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 24 Feb 2005 16:12:24 +0100
Subject: LC_ALL and os.listdir()
In-Reply-To: <Xns96076F2D5A37Bduncanrcpcouk@127.0.0.1>
References: <mailman.2959.1109142240.22381.python-list@python.org>
	<421cf088$0$8788$9b622d9e@news.freenet.de>
	<cvitch$111q$1@news.comcor-tv.ru>
	<421cff55$0$16589$9b622d9e@news.freenet.de>
	<Xns96076F2D5A37Bduncanrcpcouk@127.0.0.1>
Message-ID: <421DEED8.6030101@v.loewis.de>

Duncan Booth wrote:
> Windows (when using NTFS) stores all the filenames in unicode, and Python 
> uses the unicode api to implement listdir (when given a unicode path). This 
> means that the filename never gets encoded to a byte string either by the 
> OS or Python. If you use a byte string path than the filename gets encoded 
> by Windows and Python just returns what it is given.

Serge's answer is good: you might only want to apply this algorithm to
posixpath. OTOH, in the specific case, it would not have caused problems
if it were applied to ntpath as well: the path was a Unicode string, so
listdir would have returned only Unicode strings (on Windows), and the
code in path.join dealing with mixed string types would not have been
triggered.

Again, I think the algorithm should be this:
- if both are the same kind of string, just concatenate them
- if not, try to coerce the byte string to a Unicode string, using
   sys.getfileencoding()
- if that fails, try the other way 'round
- if that fails, let join fail.

The only drawback I can see with that approach is that it would "break"
environments where the system encoding is "undefined", i.e. implicit
string/unicode coercions are turned off. In such an environment, it
is probably desirable that os.path.join performs no coercion as well,
so this might need to get special-cased.

Regards,
Martin


From grante at visi.com  Wed Feb  9 18:18:39 2005
From: grante at visi.com (Grant Edwards)
Date: 09 Feb 2005 23:18:39 GMT
Subject: A great Alan Kay quote
References: <420a5c1e$0$21630$a1866201@visi.com>
	<XL6dnQ1rPechD5ffRVn-uw@powergate.ca>
Message-ID: <420a9a4f$0$21623$a1866201@visi.com>

On 2005-02-09, Peter Hansen <peter at engcorp.com> wrote:

>>     I characterized one way of looking at languages in this
>>     way: a lot of them are either the agglutination of features
>>     or they're a crystallization of style. Languages such as
>>     APL, Lisp, and Smalltalk are what you might call style
>>     languages, where there's a real center and imputed style to
>>     how you're supposed to do everything.

> Then Perl is an "agglutination of styles", while Python might
> be considered a "crystallization of features"...

Exactly.

-- 
Grant Edwards                   grante             Yow!  NOW, I'm supposed
                                  at               to SCRAMBLE two, and HOLD
                               visi.com            th' MAYO!!


From aljosa at fluidmedia.hr  Fri Feb  4 01:55:46 2005
From: aljosa at fluidmedia.hr (Aljosa Mohorovic)
Date: Fri, 04 Feb 2005 06:55:46 +0000
Subject: dynamic func. call
Message-ID: <ctvrdk$evf$1@bagan.srce.hr>

can i do something like this:

s = "myFunction"
a = s() # equals to: a = myFunction()




From john_sips_teaz at yahooz.com  Thu Feb 17 02:04:39 2005
From: john_sips_teaz at yahooz.com (John M. Gabriele)
Date: Thu, 17 Feb 2005 02:04:39 -0500
Subject: difference between class methods and instance methods
Message-ID: <pan.2005.02.17.07.04.37.907754@yahooz.com>

I've done some C++ and Java in the past, and have recently learned
a fair amount of Python. One thing I still really don't get though
is the difference between class methods and instance methods. I
guess I'll try to narrow it down to a few specific questions, but
any further input offered on the subject is greatly appreciated:

1. Are all of my class's methods supposed to take 'self' as their
first arg?

2. Am I then supposed to call them with MyClass.foo() or instead:

    bar = MyClass()
    bar.foo()
?

3. Is "bound method" a synonym for instance method?

4. Is "unbound method" a synonym for class method?

And if anyone's *really* daring:
Where do the so-called "static methods" fit into all this?
By the name of them, it sounds like the same thing as class
methods...

Much thanks,
---J

-- 
--- if replying via email, remove zees ---




From nick at craig-wood.com  Wed Feb  9 05:31:23 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 09 Feb 2005 10:31:23 GMT
Subject: Java Integer.ParseInt translation to python
References: <008d01c507f4$451d9b30$2820790d@stso.xcdg.xerox.com>
	<372a762405013116263a4e93b7@mail.gmail.com>
	<mailman.2222.1107909486.22381.python-list@python.org>
Message-ID: <slrnd0jnmm.l3u.nick@irishsea.home.craig-wood.com>

jose isaias cabrera <jicman at cinops.xerox.com> wrote:
[java output]
>  StringLength = 40
>  c1 193 -63
>  7c 124 124
>  e1 225 -31
>  86 134 -122
>  ab 171 -85
>  94 148 -108
>  ee 238 -18
>  b0 176 -80
>  de 222 -34
>  8a 138 -118
>  e3 227 -29
>  b5 181 -75
>  b7 183 -73
>  51 81 81
>  a7 167 -89
>  c4 196 -60
>  d8 216 -40
>  e9 233 -23
>  ed 237 -19
>  eb 235 -21
>  [B at 1616c7
> 
>  But, here is what I have for python,
> 
>  def PrepareHash(HashStr):
>    while len(HashStr) > 0:
>      byte = HashStr[0:2]
>      print byte,int(byte,16),byte(int(byte,16)) # & 0xff
>      HashStr = HashStr[2:]
>    return byte
> 
>  def Main():
>    HashStr = "c17ce186ab94eeb0de8ae3b5b751a7c4d8e9edeb"
>    HashStr = PrepareHash(HashStr)
>    print "Prepared HashStr :",HashStr
> 
>  Main()

When I try your code I get this...

>>> def PrepareHash(HashStr):
...     while len(HashStr) > 0:
...             byte = HashStr[0:2]
...             print byte,int(byte,16),byte(int(byte,16)) # & 0xff
...             HashStr = HashStr[2:]
...     return byte
... 
>>> HashStr = "c17ce186ab94eeb0de8ae3b5b751a7c4d8e9edeb"
>>> print PrepareHash(HashStr)
c1 193
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 4, in PrepareHash
TypeError: 'str' object is not callable
>>> 

You cant do byte(int(byte,16)) - byte is a string!  So you haven't
posted the actual code you ran...

Anyway what you want is this

>>> decoded = HashStr.decode('hex')
>>> for i,c in enumerate(decoded): print "%2d %02x" % (i,ord(c))
... 
 0 c1
 1 7c
 2 e1
 3 86
 4 ab
 5 94
 6 ee
 7 b0
 8 de
 9 8a
10 e3
11 b5
12 b7
13 51
14 a7
15 c4
16 d8
17 e9
18 ed
19 eb

>  and it results to,
> 
>  mulo 19:32:06-> python test.py
>  c1 193 ?
>  7c 124 |
>  e1 225 ?
>  86 134
>  ab 171 ?
>  94 148
>  ee 238 ?
>  b0 176 ?
>  de 222 ?
>  8a 138
>  e3 227 ?
>  b5 181 ?
>  b7 183 ?
>  51 81 Q
>  a7 167 ?
>  c4 196 ?
>  d8 216 ?
>  e9 233 ?
>  ed 237 ?
>  eb 235 ?
> 
>  which is not even close, and yes, I know that it's not the same
>  code.

Actually the hex digits are the same in all 3 cases, so the strings
are the same.  The reason the characters look different is because
you've got a different encoding for the python and java output I would
guess.

Java bytes are signed also just to add to the confusion.

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


From irmen.NOSPAM at xs4all.nl  Mon Feb 14 19:36:35 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Tue, 15 Feb 2005 01:36:35 +0100
Subject: is there a safe marshaler?
In-Reply-To: <mailman.2592.1108426198.22381.python-list@python.org>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl><1108051828.483222.62670@z14g2000cwz.googlegroups.com><7xmzu6q4cv.fsf@ruckus.brouhaha.com><4211185b$0$28982$e4fe514c@news.xs4all.nl><7xbramzt1c.fsf@ruckus.brouhaha.com><42112b1e$0$28978$e4fe514c@news.xs4all.nl><7xacq6sqej.fsf@ruckus.brouhaha.com><421130ae$0$28984$e4fe514c@news.xs4all.nl><7x3bvyiuin.fsf@ruckus.brouhaha.com>	<42113b3b$0$28991$e4fe514c@news.xs4all.nl>
	<mailman.2592.1108426198.22381.python-list@python.org>
Message-ID: <421143c5$0$28990$e4fe514c@news.xs4all.nl>

Fredrik Lundh wrote:

> the bug had nothing to do with the XML-RPC protocol itself;

True, sorry for the confusion. I should have written it more precisely.

> it was a
> weakness in the SimpleXMLRPCServer framework which used reflection
> to automatically publish instance methods (if you use getattr repeatedly on
> an instance, you can access a lot more than just attributes and methods...)
> 
> how do you publish "RPC endpoints" in Pyro?

By reflection :-)   return getattr(self,method) (*args,**keywords)
But Pyro currently treats attribute lookups differently.
It either ignores them completely (you have to enable remote-attribute
access explicitly) or returns attributes as 'local' objects.
What I mean is that you can access a remote attribute of a Pyro object,
but only one level deep. There is no repeated (nested) remote attribute
lookup. It's quite difficult to explain, if you want more details please
read the relevant section in the Pyro manual:
http://pyro.sourceforge.net/manual/7-features.html#nestedattrs
As far as I can see, Pyro is safe from the XMLRPCServer weakness.

Interestingly, I have been thinking for a long time to add nested
remote attribute lookup to Pyro. I know know that this is perhaps
not a really good idea :)


--Irmen


From simonwittber at gmail.com  Fri Feb 25 03:41:23 2005
From: simonwittber at gmail.com (Simon Wittber)
Date: Fri, 25 Feb 2005 16:41:23 +0800
Subject: web status display for long running program
In-Reply-To: <1109316391.203166.119700@z14g2000cwz.googlegroups.com>
References: <509534af.0502241737.5f62992@posting.google.com>
	<uvudnX-pwMGcCIPfRVn-iw@powergate.ca>
	<1109316391.203166.119700@z14g2000cwz.googlegroups.com>
Message-ID: <4e4a11f805022500411f00216e@mail.gmail.com>

> I was inspired to enhance your code, and perform a critical bug-fix.
> Your code would not have sent large files out to dialup users, because
> it assumed all data was sent on the 'send' command. I added code to
> check for the number of bytes sent, and loop until it's all gone. 

Another solution is to simply use the socket.sendall method, which
will continue to send all data until all the bytes have been sent.

Sw.


From jepler at unpythonic.net  Tue Feb  8 13:03:04 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Tue, 8 Feb 2005 12:03:04 -0600
Subject: Is Python as capable as Perl for sysadmin work?
In-Reply-To: <pan.2005.02.08.04.01.16.605059@yahooz.com>
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
Message-ID: <20050208180302.GG26239@unpythonic.net>

No.

Unlike Perl, Python implements only a *finite turning machine* model of
computation.  An easy way to see this limitation is in the following
code:
    >>> 1.0 / 10.0
    0.10000000000000001
In an infinite Turning machine, there would be an unbounded number of
zeros before the second 1, giving the exact result, not a numeric
approximation.

There's another little-known fact about Python:  No string is permitted
to end with a backslash!  You might think that variations like
    r'\'
or
    """"""\\\\\""""""
would allow you to create this elusive value, but you'd mistaken!
Now, this may not bother Unix sysadmins, but the honest truth is that
you'll be administrating Windows systems, too, anywhere you work!

Finally, Python just doesn't respond to threats as well as Perl does.
I have run into many Perl programs that just didn't quite work right
until I wrote '... or die "$!"' in the right places.  Well, if you ever
have to threaten Python, just keep in mind that '... or die' just plain
won't work.  You have to suggest that it 'try ... except', which is
really offensive.  If I want to beg my computer to run programs, I know
where to find Intercal with its "PLEASE" and "DO PLEASE" constructions.

Jeff
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From ncoghlan at iinet.net.au  Tue Feb  8 05:50:25 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Tue, 08 Feb 2005 20:50:25 +1000
Subject: empty classes as c structs?
In-Reply-To: <cu8amb$ufa$1@sea.gmane.org>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<7rSdne7BcbDeV57fRVn-jg@comcast.com>	<mailman.1963.1107594941.22381.python-list@python.org>	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>	<mailman.1973.1107618702.22381.python-list@python.org>	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>	<mailman.2006.1107658273.22381.python-list@python.org>	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>	<mailman.2049.1107750700.22381.python-list@python.org>	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com>	<4207606E.4040806@iinet.net.au>
	<cu8amb$ufa$1@sea.gmane.org>
Message-ID: <42089971.2010706@iinet.net.au>

Michael Spencer wrote:
> Nick Coghlan wrote:
>> The other issue is that a namespace *is* a mutable object, so the 
>> default behaviour should be to make a copy
>>
> I don't follow this argument.  Why does mutability demand copy?  Given 
> that somedict here is either a throwaway (in the classic bunch 
> application ) or a dict that must be updated (the wrap-dict case), 
> copying doesn't make much sense to me.
> 
> OTOH, dict.__init__(dict) copies.  hmmmm....

As you noticed, it's a precedent from the other builtins and objects in the 
standard library. The mutable ones (dict, list, set, etc) all make a copy of 
whatever you pass in.

>> This is to allow easy copying of 
>> an existing namespace - 
> 
> Can't this be spelled namespace(somenamespace).__copy__()?

Again, as Steven mentioned, this is based on precedent from other objects in the 
interpreter. To get your own copy of a mutable type, you invoke the constructor 
with the original as the sole argument.

>  > for anything else, invoking vars() is easy enough.
> 
> If there is potential for confusion, I'd be tempted to disallow 
> namespaces as an argument to update/__update__

Limiting confusion is why I decided to restrict the special-case of querying the 
__dict__ to instances of namespace. Again, as Steven pointed out, the semantics 
get screwed up when the object supplied is usable as a dictionary, but also has 
a __dict__ attribute.

For a namespace, the special case means that namespace(ns_obj) and 
namespace(vars(ns_obj)) have the same result. Just don't go creating a namespace 
subclass which provides a direct mapping interface to anything other than it's 
own __dict__ and expect to affect namespaces created using the normal 
constructor. I figure that limitation is obscure enough that we can live with it :)

For an arbitrary object, you can poke around in its __dict__ by doing:
   namespace.view(vars(obj))

> We could use __add__, instead for combining namespaces

Update already let's us combine namespaces. To create a new object that merges 
two namespaces do:
   namespace.update(namespace(ns_1), ns_2)

> Good idea.  The implementation ought to be tested against several 
> plausible specializations.

One thing I'm going to drop is the ability to use an arbitrary class as a 
subrecord. I realised it screws up storage of classes and class instances which 
have a __dict__ attribute.

Instead, I'll change it so that the optional argument allows you to set some of 
the attributes.

> I don't like the sound of that.  The whole point here - whether as 
> Steven's nice straightforward bunch, as originally conceived, or the 
> other cases you and I and others have been 'cluttering' the discussion 
> with ;-)  is convenience, and readability.  If there are hoops to jump 
> through to use it, then the benefit is quickly reduced to zero.

Yes, once I realised that the polymorphism friendly 'type(self).update(self, 
other)' works with a classmethod, I realised it made sense to go with Steven's 
classmethod approach.

I'll also revert to his *args based solution to the keyword argument problem, too.

Time to go play cricket, so I won't actually be posting any of the above changes 
tonight :)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From dfcruz at student.dei.uc.pt  Wed Feb 23 12:40:17 2005
From: dfcruz at student.dei.uc.pt (Daniel Alexandre)
Date: Wed, 23 Feb 2005 17:40:17 +0000
Subject: Arrow-keys bug.
Message-ID: <3e6bc6407074ab0ade0720735c2c32d7@student.dei.uc.pt>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi there.

I'm making a talker's base in python and i'm with a serious bug in it.
Everytime a client connects to the talker and presses for ex. the arrow 
key lets say twice, the following characters appears in it's screen: 
?[[A?[[A, if he presses enter to send that characters to all the users 
in the talker, the user's screen will go up two lines, and the input 
line will be there, replacing older text, instead of being where it 
should, in the bottom of the screen; this also works for the down key 
and for home, end, etc. Does anyone here knows how I can strip those 
keys? Thanks in advance.
- -- 
Cumprimentos,
Daniel Alexandre ( dfcruz at student.dei.uc.pt )
Chave p?blica PGP: http://student.dei.uc.pt/~dfcruz/pubring.html
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (Darwin)

iD8DBQFCHMAEL3+DjgQV3LgRApyBAJ9iPL428OkF1vHwTu61F6zQIz0SeQCg03D+
NAp+hY/10+IPUQa0T1fGjGY=
=ooz8
-----END PGP SIGNATURE-----



From abpillai at gmail.com  Tue Feb  1 08:27:05 2005
From: abpillai at gmail.com (Anand)
Date: 1 Feb 2005 05:27:05 -0800
Subject: Remove HTML tags (except anchor tag) from a string using
	regular expressions
In-Reply-To: <1107261791.167726.53110@c13g2000cwb.googlegroups.com>
References: <mailman.1687.1107259469.22381.python-list@python.org>
	<1107261791.167726.53110@c13g2000cwb.googlegroups.com>
Message-ID: <1107264425.250797.40210@f14g2000cwb.googlegroups.com>

I meant
content = re.sub ('<[^!(a>)]([^>]|\n)*[^!(/a)]>', '', content)

Sorry for the mistake.
However this seems to also print tags like <b>, <p> etc
also.

-Anand



From and-google at doxdesk.com  Thu Feb 24 06:38:11 2005
From: and-google at doxdesk.com (and-google at doxdesk.com)
Date: 24 Feb 2005 03:38:11 -0800
Subject: Problem with minidom and special chars in HTML
References: <421b5b8c$1@news.uni-klu.ac.at>
Message-ID: <1109245091.826710.208010@g14g2000cwa.googlegroups.com>

Horst Gutmann wrote:

> I currently have quite a big problem with minidom and special chars
> (for example &uuml;)  in HTML.

Yes. Ignoring the issue of the wrong doctype, minidom is a pure XML
parser and knows nothing of XHTML and its doctype's entities 'uuml' and
the like. Only the built-in entities (&amp; etc.) will work.

Unfortunately the parser minidom uses won't read external entities -
including the external subset of the DTD (which is where all the stuff
about what "&uuml;" means is stored). And because minidom does not
support EntityReference nodes, the information that there was an entity
reference there at all gets thrown away as it is replaced with the
empty string. Which is kind of bad.

Possible workarounds:

1. pass minidom a different parser to use, one which supports external
entities and which will parse all the DTD stuff. I don't know if there
is anything suitable available, though...

2. use a DOM implementation with the option to support external
entities. For example, with pxdom, one can use DOM Level 3 LS methods,
or pxdom.parse(f, {'pxdom-external-entities': True}).

However note that reading and parsing an external entity will introduce
significant slowdown, especially in the case of the rather complex
multi-file XHTML DTD. Other possibilities:

3. hack the content on the way into the parser to replace the DOCTYPE
declaration with one including entity definitions in the internal
subset:

  <!DOCTYPE html PUBLIC "..." "..." [
    <!ENTITY uuml "&#252;">
    ...
  ]>
  <html>...

4. hack the content on the way into the parser to replace entity
references with character references, eg. &uuml; -> &#252;. This is
'safe' for simple documents without an internal subset; charrefs and
entrefs can be used in the same places with the same meaning, except
for some issues in the internal subset.

5. use a DOM implementation that supports EntityReference nodes, such
as pxdom. Entity references with no replacement text (or all entity
references if the DOM Level 3 LS parameter 'entities' is set) will
exist as EntityReference DOM objects instead of being flattened to
text. They can safely be reserialized as &uuml; without the
implementation having to know what text they represent.

Entities are a big source of complication and confusion, which I wish
had not made it into XML!

-- 
Andrew Clover
mailto:and at doxdesk.com
http://www.doxdesk.com/



From evan at tokenexchange.com  Tue Feb  1 11:58:42 2005
From: evan at tokenexchange.com (Evan Simpson)
Date: Tue, 01 Feb 2005 10:58:42 -0600
Subject: one infinite leap and you thought the bible code was somthing!!
In-Reply-To: <1107274549.913265.89980@f14g2000cwb.googlegroups.com>
References: <1107274549.913265.89980@f14g2000cwb.googlegroups.com>
Message-ID: <41FFB542.2030507@tokenexchange.com>

zetasum wrote:
> One Small step one infinite leap

I think this is what you're looking for:

   import itertools
   for x in itertools.chain('step', itertools.cycle('leap')):
       print markov_chain_text(net_loon_compendium, seed=x)

Cheers,

Evan @ 4-am



From peter at somewhere.com  Tue Feb  8 15:20:25 2005
From: peter at somewhere.com (Peter Maas)
Date: Tue, 08 Feb 2005 21:20:25 +0100
Subject: Is Python as capable as Perl for sysadmin work?
In-Reply-To: <mailman.2204.1107885796.22381.python-list@python.org>
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
	<mailman.2204.1107885796.22381.python-list@python.org>
Message-ID: <36slc5F54d2sjU1@individual.net>

Jeff Epler schrieb:
> There's another little-known fact about Python:  No string is permitted
> to end with a backslash! 

Sure you meant string literals. But that is wrong, too:

 >>> a = '\\'
 >>> print a
\

A Python string mustn't end with an *odd* number of backslashes. Other-
wise a literal using backslash escapes like 'don\'t do that' couldn't
be parsed.

> Now, this may not bother Unix sysadmins, but the honest truth is that
> you'll be administrating Windows systems, too, anywhere you work!

This is no problem, thanks to os.path.join() ;)

> Well, if you ever
> have to threaten Python, just keep in mind that '... or die' just plain
> won't work.  You have to suggest that it 'try ... except', which is
> really offensive.  If I want to beg my computer to run programs, I know
> where to find Intercal with its "PLEASE" and "DO PLEASE" constructions.

Sysadmin work with Intercal? Go ahead! ;) But what's wrong with a
protecting try .. except block vs. "... or die" for every command
to be protected?

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From siona at chiark.greenend.org.uk  Fri Feb 11 10:50:25 2005
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 11 Feb 2005 15:50:25 +0000 (GMT)
Subject: Install MySQLdb on Mac OS X (10.3)
References: <420bf2f4$0$16553$9b622d9e@news.freenet.de>
	<mailman.2360.1108089047.22381.python-list@python.org>
Message-ID: <jyb*quZGq@news.chiark.greenend.org.uk>

Skip Montanaro  <skip at pobox.com> wrote:
>Try a more recent version of mysql-python.  I think 1.1.7 is the latest.

1.2.0 -- it appears to be moving extremely rapidly (especially given
how long it was at 0.9.2 -- although "Waiting for MySQL 4.1 to become
stable" would be a good explanation for that).

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From amand at alrj.org  Wed Feb 16 13:12:27 2005
From: amand at alrj.org (Amand Tihon)
Date: Wed, 16 Feb 2005 19:12:27 +0100
Subject: Getting milliseconds in Python
References: <1108565135.167562.196830@z14g2000cwz.googlegroups.com>
	<37h5epF5ck38lU2@individual.net>
	<1108571009.698970.152020@z14g2000cwz.googlegroups.com>
	<cv0100$715$1@eeyore.INS.cwru.edu>
Message-ID: <42138d0b$0$2018$6c56d894@feed0.news.be.easynet.net>

Brian Beck wrote:
> That IS what you want.
> 
> seconds * 100 = milliseconds

May I assume that this IS what you want ?

          ()___
        ()//__/)_________________()
        ||(___)//#/_/#/_/#/_/#()/||
        ||----|#| |#|_|#|_|#|_|| ||
        ||____|_|#|_|#|_|#|_|#||/||
        ||    |#|_|#|_|#|_|#|_||

:)

(credits to jgs, found on http://www.ascii-art.de/ascii/ab/bed.txt)

-- 
Amand Tihon


From peter at engcorp.com  Mon Feb 14 09:08:52 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 14 Feb 2005 09:08:52 -0500
Subject: For American numbers
In-Reply-To: <cups3k$kbs$2@gemini.csx.cam.ac.uk>
References: <420e7376$1@nntp0.pdx.net>	<gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>	<420fb4e6$0$16575$9b622d9e@news.freenet.de>	<ZcKdnWy9_fFamI3fRVn-iA@powergate.ca>
	<mailman.2509.1108352149.22381.python-list@python.org>
	<37b8dfF5anl9bU1@individual.net>
	<cups3k$kbs$2@gemini.csx.cam.ac.uk>
Message-ID: <kNWdnbAjTNbwLI3fRVn-qg@powergate.ca>

Michael Hoffman wrote:
> Peter Maas wrote:
> 
>> This kibi-mebi thing will probably fail because very few can manage
>> to say "kibibyte" with a straight face :)
> 
> I agree, I can't do it yet. I can write kiB and MiB though with a
> straight face, and find that useful.

And here I thought MiB meant "Men In Black"... ;-)


From aahz at pythoncraft.com  Wed Feb 23 20:10:23 2005
From: aahz at pythoncraft.com (Aahz)
Date: 23 Feb 2005 20:10:23 -0500
Subject: rounding problem
References: <gu6dnWNLB-FHuoDfRVn-tA@comcast.com>
Message-ID: <cvj9hv$llt$1@panix2.panix.com>

In article <gu6dnWNLB-FHuoDfRVn-tA at comcast.com>,
Andy Leszczynski  <leszczynscy at nospamyahoo.com> wrote:
>It is on Windows, Linux, Python 2.3:
>
>[GCC 3.3.2 (Mandrake Linux 10.0 3.3.2-6mdk)] on linux2
>Type "help", "copyright", "credits" or "license" for more information.
> >>> a=1.1
> >>> a
>1.1000000000000001
> >>>
>
>
>Is it normal?

http://www.python.org/doc/current/tut/node16.html
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From tdelaney at avaya.com  Mon Feb 14 18:56:23 2005
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Tue, 15 Feb 2005 10:56:23 +1100
Subject: Inheritance error in python 2.3.4???
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE02520362@au3010avexu1.global.avaya.com>

friedmud at gmail.com wrote:

> I guess I could just use one underscore.... but that means it is
> easier for other people to get at my implementation details (which,
> coming from a C++ background really bothers me).

This is the correct solution, and getting over being bothered about it
is the correct thing to do.

Getting at private members is simple in C++ too if anyone wants to do
that.

Tim Delaney


From steven.bethard at gmail.com  Mon Feb 14 15:37:54 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 14 Feb 2005 13:37:54 -0700
Subject: changing __call__ on demand
In-Reply-To: <421105e8$0$374$626a14ce@news.free.fr>
References: <cuo0e1$4l2$1@lnx107.hrz.tu-darmstadt.de>
	<tSMPd.263$7O6.88@fe61.usenetserver.com>
	<421105e8$0$374$626a14ce@news.free.fr>
Message-ID: <FJidnQPMULCBkYzfRVn-hQ@comcast.com>

F. Petitjean wrote:
> Le Sun, 13 Feb 2005 13:19:03 -0500, Hans Nowak a ?crit :
>>Note that it works just fine if you don't use a new-style class:
>>
>>>>>class Test:
>>
>>...     def __init__(self):
>>...         self.__call__ = self.foobar
>>...     def foobar(self, *args, **kwargs):
>>...         print "Called with:", args, kwargs
>>...
>>
>>>>>t = Test()
>>>>>t()
>>
>>Called with: () {}
>>
>>>>>t(3, 4)
>>
>>Called with: (3, 4) {}
>>
>>>>>t(42, x=0)
>>
>>Called with: (42,) {'x': 0}
> 
> Are you sure that if you add a __call__() method, it will still work
> fine ?

Simple enough to check, isn't it?

py> class C:
...     def __init__(self):
...         self.__call__ = lambda: "__init__"
...     def __call__(self):
...         return "__call__"
...
py> C()()
'__init__'

Old-style classes lookup methods like __call__ on the instance[1]. 
New-style classes look them up on the type:

py> class C:
...     def __init__(self):
...         self.__iter__ = lambda: iter(["__init__"])
...     def __iter__(self):
...         return iter(["__call__"])
...
py> list(C())
['__init__']
py> class C(object):
...     def __init__(self):
...         self.__iter__ = lambda: iter(["__init__"])
...     def __iter__(self):
...         return iter(["__call__"])
...
py> list(C())
['__call__']

AFAICT, non-magic methods are looked up on instance first:

py> class C:
...     def __init__(self):
...         self.f = lambda: "__init__"
...     def f(self):
...         return "__call__"
...
py> C().f()
'__init__'
py> class C(object):
...     def __init__(self):
...         self.f = lambda: "__init__"
...     def f(self):
...         return "__call__"
...
py> C().f()
'__init__'

STeVe

[1] Well, they look there first.


From oliver.eichler at dspsolutions.de  Thu Feb 10 04:16:35 2005
From: oliver.eichler at dspsolutions.de (Oliver Eichler)
Date: Thu, 10 Feb 2005 10:16:35 +0100
Subject: convert list of tuples into several lists
References: <cud40u$vqb$01$1@news.t-online.com>
	<36uihlF58p63iU1@individual.net>
	<cudcad$2bu$03$1@news.t-online.com>
	<420a37fd$0$12847$626a14ce@news.free.fr>
Message-ID: <cuf8pk$ftp$00$1@news.t-online.com>

Pierre Barbier de Reuille wrote:
> Best answer is : try it :)
> use the "timeit" module (in the standard lib) to do so ...

Ok,

import timeit

s = """\
a,b,c1,c2 = zip(*[(x[2],x[4], x[2]-x[1], x[2] - x[3]) for x in z])
"""

t = timeit.Timer(stmt=s,setup="z = [(1,2,3,4,5)]*1000")
print "%.2f usec/pass" % (1000000 * t.timeit(number=100000)/100000)

s ="""\
for x in z:
  a = x[2]
  b = x[4]
  c1 = x[2] - x[1]
  c2 = x[2] - x[3]
"""

t = timeit.Timer(stmt=s,setup="z = [(1,2,3,4,5)]*1000")
print "%.2f usec/pass" % (1000000 * t.timeit(number=100000)/100000)

for 30 elements:
oeichler at frog:~/tmp> python test.py
32.90 usec/pass
21.53 usec/pass

for 100 elements:
oeichler at frog:~/tmp> python test.py
103.32 usec/pass
70.91 usec/pass

for 100 elements:
oeichler at frog:~/tmp> python test.py
1435.43 usec/pass
710.55 usec/pass

What do we learn? It might look elegant but it is slow. I guess mainly
because I do the iteration twice with the zip command. The 1000 element run
seems to show what Guido means with "abuse of the argument passing
machinery"

Learned my lesson :)

Thanks to all

Oliver




From xah at xahlee.org  Wed Feb  2 11:44:31 2005
From: xah at xahlee.org (Xah Lee)
Date: 2 Feb 2005 08:44:31 -0800
Subject: how to write a tutorial
In-Reply-To: <1107354540.608556.305540@z14g2000cwz.googlegroups.com>
References: <1106305730.361540.21010@f14g2000cwb.googlegroups.com>
	<1106472508.591411.40140@c13g2000cwb.googlegroups.com>
	<1106723545.429728.308620@f14g2000cwb.googlegroups.com>
	<1107354540.608556.305540@z14g2000cwz.googlegroups.com>
Message-ID: <1107362671.182505.22180@c13g2000cwb.googlegroups.com>

i've noticed that in Python official doc
http://python.org/doc/lib/module-re.html
and also How-To doc
http://www.amk.ca/python/howto/regex/

both mentions the book "Mastering Regular Expressions" by Jeffrey
Friedl.

I suggest it be dropped in both places. The mentioning of this book in
the Perl/Python community is mostly a fawning behavior and confession
that the author is among "in the know". This book and its mentioning is
a cultish behavior among OpenSource morons.

Most of the time, its mentioning as a reference is irrelevant. 99% uses
of regex are the simplest uses. Spending time to read this book of
specialization, from economy perspective, is a waste of time.
Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From idadesub at gmail.com  Wed Feb  2 21:10:14 2005
From: idadesub at gmail.com (Erick)
Date: 2 Feb 2005 18:10:14 -0800
Subject: streaming a file object through re.finditer
In-Reply-To: <1107396145.400036.271010@g14g2000cwa.googlegroups.com>
References: <1107396145.400036.271010@g14g2000cwa.googlegroups.com>
Message-ID: <1107396614.888869.94640@f14g2000cwb.googlegroups.com>

Ack, typo. What I meant was this:
cat a b c > blah

>>> import re
>>> for m in re.finditer('\w+', file('blah')):

...   print m.group()
...
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: buffer object expected

Of course, this works fine, but it loads the file completely into
memory (right?):
>>> for m in re.finditer('\w+', file('blah').read()):
...   print m.group()
...
a
b
c



From ilias at lazaridis.com  Tue Feb 15 11:10:19 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 18:10:19 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <XX+64LRqnLECFwAV@objmedia.demon.co.uk>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr>
	<XX+64LRqnLECFwAV@objmedia.demon.co.uk>
Message-ID: <cut6t9$sla$1@usenet.otenet.gr>

Stephen Kellett wrote:
> In message <cuq084$r99$1 at usenet.otenet.gr>, Ilias Lazaridis 
> <ilias at lazaridis.com> writes
> 
>>> The answer to most of your questions is, "Because no one has yet 
>>> volunteered their time and effort to get the job done."
>>
>> this answer do not fit in most questions.
>>
>> please review them again.
> 
> There you go. Failed the test. He is an AI. A human wouldn't make this 
> mistake.

Even an simple AI would detect:

there are other reasons behind the decision to not support the MinGW 
open-source-complier directly out of the main source-code base.

> Stephen

.

-- 
http://lazaridis.com


From dave at pythonapocrypha.com  Mon Feb 14 08:53:21 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Mon, 14 Feb 2005 06:53:21 -0700
Subject: Kill GIL
In-Reply-To: <1108358757.577366@yasure>
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>	<cum62t$3fb$1@panix2.panix.com>	<mailman.2463.1108256227.22381.python-list@python.org>	<868y5t6sal.fsf@guru.mired.org>
	<cumoue$9ur$1@panix2.panix.com>	<86sm405d38.fsf@guru.mired.org>	<mailman.2508.1108351865.22381.python-list@python.org>
	<1108358757.577366@yasure>
Message-ID: <4210AD51.6040609@pythonapocrypha.com>

Donn Cave wrote:
> Quoth Dave Brueck <dave at pythonapocrypha.com>:
> ...
> | Another related benefit is that a lot of application state is implicitly and 
> | automatically managed by your local variables when the task is running in a 
> | separate thread, whereas other approaches often end up forcing you to think in
> | terms of a state machine when you don't really care* and as a by-product you 
> | have to [semi-]manually track the state and state transitions - for some 
> | problems this is fine, for others it's downright tedious.
> 
> I don't know if the current Stackless implementation has regained any
> of this ground, but at least of historical interest here, the old one's
> ability to interrupt, store and resume a computation could be used to
> 
> As you may know, it used to be, in Stackless Python, that you could have
> both.  Your function would suspend itself, the select loop would resume it,
> for something like serialized threads.  (The newer version of Stackless
> lost this continuation feature, but for all I know there may be new
> features that regain some of that ground.)

Yep, I follow Stackless development for this very reason. Last I heard, a more 
automatic scheduler was in the works, without which in can be a little confusing 
about when non-I/O tasks should get resumed (and by who), but it's not 
insurmountable. Ideally with Stackless you'd avoid OS threads altogether since 
the interpreter takes a performance hit with them, but this can be tough if 
you're e.g. also talking to a database via a blocking API.

> I put that together with real OS threads once, where the I/O loop was a
> message queue instead of select.  A message queueing multi-threaded
> architecture can end up just as much a state transition game.  

Definitely, but for many cases it does not - having each thread represent a 
distinct "worker" that pops some item of work off one queue, processes it, and 
puts it on another queue can really simplify things. Often this maps to 
real-world objects quite well, additional steps can be inserted or removed 
easily (and dynamically), and each worker can be developed, tested, and debugged 
independently.

> I like threads when they're used in this way, as application components
> that manage some device-like thing like a socket or a graphic user interface
> window, interacting through messages.  Even then, though, there tend to
> be a lot of undefined behaviors in events like termination of the main
> thread, receipt of signals, etc.

That's how I tend to like using threads too. In practice I haven't found the 
undefined behaviors to be too much trouble though, e.g. deciding on common 
shutdown semantics for all child threads and making them daemon threads pretty 
much takes care of both expected and unexpected shutdown of the main thread.

Usings threads and signals can be confusing and troublesome, but often in cases 
where I would use them I end up wanting a richer interface anyway so something 
besides signals is a better fit.

-Dave


From peter at engcorp.com  Tue Feb 15 17:41:31 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 15 Feb 2005 17:41:31 -0500
Subject: How do I make my program start fullscreen ?
In-Reply-To: <17smpt9l5tn7z.1744dg3zal7hj.dlg@40tude.net>
References: <17smpt9l5tn7z.1744dg3zal7hj.dlg@40tude.net>
Message-ID: <R_mdncpcU_OJ5o_fRVn-gQ@powergate.ca>

BOOGIEMAN wrote:
> os = windows xp 
> How do I make "myprogram.py" start fullscreen at windows command prompt ?
> Also I made it as "myprogram.exe" with py2exe,but how to start fullscreen ?

For an EXE, one approach is to create a shortcut (I believe making a
PIF file will also work, but haven't tried that) and modify the
Options tab under Properties, in a way that will be obvious
when you get there...

Did you know that switching to full-screen requires a mere
"Alt+Enter", however?  Maybe you don't need to force it there
to begin with.

-Peter


From ilias at lazaridis.com  Tue Feb 15 11:02:56 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 18:02:56 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <qno1UWSxtLECFwEp@objmedia.demon.co.uk>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr>
	<qno1UWSxtLECFwEp@objmedia.demon.co.uk>
Message-ID: <cut6fe$ovt$3@usenet.otenet.gr>

Stephen Kellett wrote:
> In message <cuq57b$j83$1 at usenet.otenet.gr>, Ilias Lazaridis 
> <ilias at lazaridis.com> writes
> 
>> the community do not care about essential needs and requirements.
> 
> Wrong. They do. They just don't care about *your* essential needs and 
> requirements which *you* want *others* to fulfill at *their* cost. As 
> others have said, "do some work yourself".

your accousations are false.

please review my initial message.

> Stephen

.

-- 
http://lazaridis.com


From tom.willis at gmail.com  Tue Feb 22 21:12:20 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Tue, 22 Feb 2005 21:12:20 -0500
Subject: Dealing with config files what's the options
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E801DAFEB4@its-xchg4.massey.ac.nz>
References: <ECBA357DDED63B4995F5C1F5CBE5B1E80222896D@its-xchg4.massey.ac.nz>
	<ECBA357DDED63B4995F5C1F5CBE5B1E801DAFEB4@its-xchg4.massey.ac.nz>
Message-ID: <b54d04890502221812474515db@mail.gmail.com>

Thanks,

I'm not too keen on the ini layout. But it's good to know it's there.


On Wed, 23 Feb 2005 14:50:27 +1300, Tony Meyer <t-meyer at ihug.co.nz> wrote:
> > How are the expert pythoneers dealing with config files?
> [...]
> 
> You can just "import ConfigParser", or look at the various alternatives:
> 
> <http://www.python.org/moin/ConfigParserShootout>
> 
> =Tony.Meyer
> 
> 


-- 
Thomas G. Willis
http://paperbackmusic.net


From JoshuaACohen at gmail.com  Wed Feb 16 14:14:14 2005
From: JoshuaACohen at gmail.com (Josh)
Date: 16 Feb 2005 11:14:14 -0800
Subject: Win32api shellexecute Bshow
In-Reply-To: <1108579563.115168.170120@f14g2000cwb.googlegroups.com>
References: <1108572241.817012.219940@z14g2000cwz.googlegroups.com>
	<1108579563.115168.170120@f14g2000cwb.googlegroups.com>
Message-ID: <1108581254.694073.325350@o13g2000cwo.googlegroups.com>

Thanks,

I'll take a look at using GhostScript and GSPrint instead. 

Josh



From adam at eden.com  Fri Feb 18 16:53:01 2005
From: adam at eden.com (Adam)
Date: Fri, 18 Feb 2005 21:53:01 GMT
Subject: Font size
References: <42126822@news.comindico.com.au><ldzqyx6byqdw$.wt8smryc0t3.dlg@40tude.net><42129ea1@news.comindico.com.au><4213e033$1@news.comindico.com.au>
	<mailman.2740.1108626296.22381.python-list@python.org>
Message-ID: <421663bc@news.comindico.com.au>

Thanks Fredrik,
I got your program running (with a couple of tweaks) with just a quarter of 
an hour to spare before using it at our happy hour yesterday.
The old ladies loved it.
I can now adapt it for bingo.
Thanking you
Adam. 




From rbt at athop1.ath.vt.edu  Tue Feb 22 10:45:09 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Tue, 22 Feb 2005 10:45:09 -0500
Subject: searching pdf files for certain info
In-Reply-To: <cvfi2q$dto$1@news.mch.sbs.de>
References: <cvfdgg$fr0$1@solaris.cc.vt.edu> <cvfg5a$6g6$1@news.mch.sbs.de>
	<cvfhe5$lcv$1@solaris.cc.vt.edu> <cvfi2q$dto$1@news.mch.sbs.de>
Message-ID: <cvfk26$qb3$1@solaris.cc.vt.edu>

Andreas Lobinger wrote:
> Aloha,
> 
> rbt wrote:
> 
>> Thanks guys... what if I convert it to PS via printing it to a file or 
>> something? Would that make it easier to work with?
> 
> 
> Not really...
> The classical PS Drivers (f.e. Acroread4-Unix print-> ps) simply
> define the pdf graphics and text operators as PS commands and
> copy the pdf content directly.
> 
> Wishing a happy day
>     LOBI

I downloaded ghostscript for Win32 and added it to my PATH 
(C:\gs\gs8.15\lib AND C:\gs\gs8.15\bin). I found that ps2ascii works 
well on PDF files and it's entirely free.

Usage:

ps2ascii PDF_file.pdf > ASCII_file.txt

However, bundling a 9+ MB package with a 5K script and convincing users 
to install it is another matter altogether.


From spam at nospam.org  Wed Feb  2 20:52:16 2005
From: spam at nospam.org (Erik Johnson)
Date: Wed, 2 Feb 2005 18:52:16 -0700
Subject: Easy Q: dealing with object type
Message-ID: <420181b1$1@nntp.zianet.com>


    I quickly browsed through section 9 of the Tutorial, tried some simple
Google searches: I'm not readily seeing how to test class type.  Given some
object (might be an instance of a user-created class, might be None, might
be list, might be some other "standard" type object instance), how do you
test its type?


Python 2.2.2 (#1, Mar 17 2003, 15:17:58)
[GCC 3.3 20030226 (prerelease) (SuSE Linux)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> class A:
...   pass
...
>>> obj = A()
>>> obj
<__main__.A instance at 0x81778d4>

# Here, it's fairly obvious its an A-type object. A as defined in module
'__main__'.

# Some of the comparisons against "Python primitives", work as you might
expect...
>>> int
<type 'int'>
>>> type(3) == int
1
>>> ls = range(3)
>>> ls
[0, 1, 2]
>>> type(ls)
<type 'list'>
>>> type(ls) == list
1
>>> type({}) == dict
1
>>> type(3.14) == float
1


# but this doesn't seem to extend to user-defined classes.
>>> dir(obj)
['__doc__', '__module__']
>>> obj.__module__
'__main__'
>>> type(obj)
<type 'instance'>
>>> type(obj) == A
0
>>> type(obj) is A
0

# The following "works", but I don't want to keep a set of instances to
compare against
>>> obj2 = A()
>>> type(obj) == type(obj2)
1





From tzot at sil-tec.gr  Fri Feb  4 05:18:48 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Fri, 04 Feb 2005 12:18:48 +0200
Subject: List mapping question
References: <g-mdnXrKqZd2Ap_fRVn-rw@midcoast.com>
	<vvxMd.102714$Jk5.11242@lakeread01>
	<YrCdnTL0BbmkOJ_fRVn-iw@gwi.net>
Message-ID: <45i601h3i7m45v0lvvu01jjsulg6l9hvj7@4ax.com>

On Thu, 03 Feb 2005 17:27:05 -0500, rumours say that Marc Huffnagle
<mhuffnagle at knowtechnology.net> might have written:

>Thanks ... so there's no way to pass an actual variable into a list 
>mapping, instead of its value?  I guess I'm thinking of something the 
>equivalent of call by reference.

No, there is no way (the way you mean it).  Python variables are 'names', not
'lvalues'.  Everything in Python is an object, and you just name objects.

By doing

a = 1

you are just giving the name 'a' in the current namespace to the integer object
with value 1.

PS this might confuse you, but in python, all function calls are by value, and
all values passed are references to objects.

http://groups-beta.google.com/groups?q=group%3Acomp.lang.python+value+reference
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From ville at spammers.com  Wed Feb  2 06:36:11 2005
From: ville at spammers.com (Ville Vainio)
Date: 02 Feb 2005 13:36:11 +0200
Subject: Python for S60 mentioned in a mainstream Finnish e-news website
References: <du7wttrb8wf.fsf@lehtori.cc.tut.fi>
Message-ID: <du7sm4fb3dg.fsf@lehtori.cc.tut.fi>

Of course there is the whole hog and more in the official Nokia press
release, this time in English:

http://press.nokia.com/PR/200501/978226_5.html

It also paints an accurate and quite positive picture of Python. Now
we just need ctypes or Symbianic Swig and world domination will be
ours ;-).

(Yeah, ctypes will probably be a problem because of the way Symbian
handles DLLs)

-- 
Ville Vainio   http://tinyurl.com/2prnb


From http  Wed Feb 16 22:11:49 2005
From: http (Paul Rubin)
Date: 16 Feb 2005 19:11:49 -0800
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<Xns95FFF321AD909PaCmAnRDLM@212.27.42.70>
	<7xbrakjeu1.fsf@ruckus.brouhaha.com>
	<9sTQd.33120$XY5.31311@fe2.columbus.rr.com>
Message-ID: <7x7jl7g9sa.fsf@ruckus.brouhaha.com>

Jamey Cribbs <jcribbs at twmi.rr.com> writes:
> Either of these server scripts would have to be running as a process
> either on your web server or on another server on your network in
> order for them to work.  I don't know if that would be an issue for you.

Yes, that's the whole point.  I don't want to run a server process 24/7
just to look up two or three numbers a few times a day.


From steven.bethard at gmail.com  Sat Feb  5 14:07:25 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 05 Feb 2005 12:07:25 -0700
Subject: empty classes as c structs?
In-Reply-To: <mailman.1973.1107618702.22381.python-list@python.org>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<7rSdne7BcbDeV57fRVn-jg@comcast.com>	<mailman.1963.1107594941.22381.python-list@python.org>	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>
	<mailman.1973.1107618702.22381.python-list@python.org>
Message-ID: <MIadnXgLYun0hJjfRVn-2Q@comcast.com>

Nick Coghlan wrote:
> Alex Martelli wrote:
> 
>> Nick Coghlan <ncoghlan at iinet.net.au> wrote:
>>    ...
>>
>>> Michael Spencer also posted an interesting idea recently about 
>>> setting up
>>> a view of an existing dictionary, rather than as a separate object:
>>>
>>> class attr_view(object):
>>>   def __init__(self, data):
>>>     object.__setattr__(self, "_data", data)
>>>   def __getattr__(self, attrname):
>>>     return self._data[attrname]
>>>   def __setattr__(self, attrname, value):
>>>     self._data[attrname] = value
>>
>> Wasted indirection, IMHO.  A better implementation:
>>
>> class attr_view(object):
>>     def __init__(self, data):
>>         self.__dict__ = data
> 
> I think the idea definitely deserves mention as a possible 
> implementation strategy in the generic objects PEP, with the data 
> argument made optional:

That's basically what the current implementation does (although I use 
'update' instead of '=').  The code is complicated because the 
implementation also takes all the argument types that dicts take.

STeVe


From johnleslie at madasafish.com  Tue Feb  8 11:54:38 2005
From: johnleslie at madasafish.com (John Leslie)
Date: 8 Feb 2005 08:54:38 -0800
Subject: pass named parameters to python
Message-ID: <4412dd31.0502080854.6d98223@posting.google.com>

I am converting a korn shell script to python and want to be able to
pass named arguments into python e.g -firstparam -secondparam

Can this be done?


From dalius.dobravolskas at gmail.com  Fri Feb 11 04:19:52 2005
From: dalius.dobravolskas at gmail.com (Dalius Dobravolskas)
Date: Fri, 11 Feb 2005 11:19:52 +0200
Subject: PyINI : Cross-Platform INI parser
In-Reply-To: <cuhiak$2gl8$1@mail.cn99.com>
References: <cuhiak$2gl8$1@mail.cn99.com>
Message-ID: <98dd087e05021101191a1e81d6@mail.gmail.com>

Hello,

> I started a opensource project PyINI for corss-platform *.ini parsing at
> http://sourceforge.net/projects/pyini/
How it is different from http://docs.python.org/lib/module-ConfigParser.html?

Dalius


From gabriel.cooper at mediapulse.com  Tue Feb 15 09:41:40 2005
From: gabriel.cooper at mediapulse.com (Gabriel Cooper)
Date: Tue, 15 Feb 2005 09:41:40 -0500
Subject: Python UPS / FedEx Shipping Module
In-Reply-To: <b54d0489050214072447c17920@mail.gmail.com>
References: <mailman.2411.1108149803.22381.python-list@python.org>	<udePd.660$nC5.453@twister.nyroc.rr.com>	<b54d0489050212123430ed621d@mail.gmail.com>	<4210BAF7.9030106@mediapulse.com>
	<b54d0489050214072447c17920@mail.gmail.com>
Message-ID: <42120A24.60609@mediapulse.com>



Tom Willis wrote:

>On one hand you are helping them indirectly sell their services,  On
>the other, you are sort of competing with them, so, those companies
>have plenty of reason to screw with you by changing the specs, lot's
>of hoops to jump through to contiuously be certified.
>

Well before we make it out to be more than it is, what I have here is 
merely a module for getting rate requests. Basically we wanted a 
UPS/FedEx module to price-check shipping costs for eCommerce websites. 
The other types of requests could be implemented with no problem, but 
that's all that has been done so far.

Gabriel.


From chrisks at NOSPAM.udel.edu  Mon Feb  7 19:18:39 2005
From: chrisks at NOSPAM.udel.edu (Chris S.)
Date: Tue, 08 Feb 2005 00:18:39 GMT
Subject: Memory Allocation?
In-Reply-To: <1107758745.493713.190530@z14g2000cwz.googlegroups.com>
References: <8GCNd.9880$ya6.9761@trndny01>
	<1107758745.493713.190530@z14g2000cwz.googlegroups.com>
Message-ID: <zzTNd.16814$s16.3620@trndny02>

M.E.Farmer wrote:
> Hello Chris,
> I am sure there are many inaccuracies in this story  but hey you asked
> instead of seeking your owns answers so....
> In general you need not worry about  memory allocation.
> Too be more specific objects have a size and most of them are known (at
> least to a wizard named Tim) , but it doesn't really matter  because it
> doesn't work like that in Python.
> CPython interpreter( I have never read a lick of the source this all
> from late nite memory  ) just grabs a chunk of memory and uses it as it
> sees fit . Jython uses Java's GC . and etc..
> Now tell me do you really want to take out the garbage or look at it?
> Python does it for you so you don't have too.

Using similar logic, we shouldn't need access to the Garbage Collector 
or Profiler. After all, why would anyone need to know how fast their 
program is running or whether or not their garbage has been collected. 
Python takes care of it.


From jdhunter at ace.bsd.uchicago.edu  Mon Feb 28 11:40:52 2005
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Mon, 28 Feb 2005 10:40:52 -0600
Subject: Minor, but annoying legend problem in matplotlib
In-Reply-To: <3899dfF5n29uuU1@individual.net> (Jorl Shefner's message of
	"Fri, 25 Feb 2005 13:35:09 -0500")
References: <3899dfF5n29uuU1@individual.net>
Message-ID: <m31xb07i3v.fsf@peds-pc311.bsd.uchicago.edu>

>>>>> "Jorl" == Jorl Shefner <v451v at yahoo.com> writes:

    Jorl>    The obvious solution is to plot the lines and symbols in
    Jorl> two different commands: _______________________________


You want to explicitly pass the lines you want to legend into the
    legend command, as in 

    Symb= ['wo','ws','w^']
    LineType= ['k-','k--','k-.']

    leglines = []    
    for index,d in enumerate(DataSets):
        
        plot(x,DataSets[index],LineType[index])
        lines = plot(x,DataSets[index],Symb[index])
        leglines.extend(lines)


        
    legend(leglines, ["a","b","c"])    

    Jorl> to have it available for the second loop.  I've gotten
    Jorl> around this before for somewhat similar cases using
    Jorl> suggestions from this group of explicitly defining the
    Jorl> values the legend will use:

    Jorl> L1= plot(x,y,...

    Jorl>  but I can't figure how to do this here because of the
    Jorl> looping over the data sets.

Hope the above example helps here.

    Jorl>    On a related note, is there any way to increase the size
    Jorl> of the markers within the legend?

You can access the lines of the legend instance

leg = legend(lines, labels)
lines = leg.get_lines()
set(lines, markersize=10, markeredgewidth=2)  # etc

See http://matplotlib.sourceforge.net/examples/legend_demo.py

JDH


From press.xpress at tiscali.co.uk  Tue Feb 15 03:58:46 2005
From: press.xpress at tiscali.co.uk (press.xpress at tiscali.co.uk)
Date: Tue, 15 Feb 2005 09:58:46 +0100
Subject: MDaemon Warning - virus found: Mail System Error - Returned Mail
Message-ID: <20050215090003.4DBFC1E4005@bag.python.org>


******************************* WARNING ******************************
Este mensaje ha sido analizado por MDaemon AntiVirus y ha encontrado 
un fichero anexo(s) infectado(s).  Por favor revise el reporte de abajo.

Attachment                    Virus name               Action taken
----------------------------------------------------------------------
transcript.zip                Email-Worm.Win32.Mydoom.m Removed


**********************************************************************


The original message was received at Tue, 15 Feb 2005 09:58:46 +0100
from 125.124.237.58

----- The following addresses had permanent fatal errors -----
python-list at python.org




From harlinseritt at yahoo.com  Thu Feb 24 20:30:16 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 24 Feb 2005 17:30:16 -0800
Subject: Python Online Programming Contest
In-Reply-To: <1109283053.971905.27670@z14g2000cwz.googlegroups.com>
References: <1109278779.955986.193860@z14g2000cwz.googlegroups.com>
	<1109283053.971905.27670@z14g2000cwz.googlegroups.com>
Message-ID: <1109295016.597170.21350@o13g2000cwo.googlegroups.com>

Actually MIT is an abbreviation and not an acronym in the true sense of
the word :)



From everettcc at hotmail.com  Tue Feb 15 15:44:15 2005
From: everettcc at hotmail.com (Chad Everett)
Date: Tue, 15 Feb 2005 14:44:15 -0600
Subject: Newbie help
References: <lvUPd.10137$pE1.923@bignews3.bellsouth.net>
	<mailman.2568.1108413446.22381.python-list@python.org>
	<Le8Qd.605$3b7.602@bignews3.bellsouth.net>
	<421152d0$1_1@newspeer2.tds.net> <42115641$1_3@newspeer2.tds.net>
Message-ID: <e6tQd.521$lI2.137@bignews5.bellsouth.net>

No problem,  I need all the help and insruction I can get.
Thanks,
Chad

"Kent Johnson" <kent37 at tds.net> wrote in message 
news:42115641$1_3 at newspeer2.tds.net...
> Kent Johnson wrote:
>> You might be interested in the Python tutor mailing list which is 
>> specifically intended for beginners.
>> http://mail.python.org/mailman/listinfo/tutor
>
> Ah, I don't mean to imply that this list is unfriendly to beginners, or 
> that you are not welcome here! Just pointing out another resource.
>
> Kent 




From gmane-schpam at joefrancia.com  Tue Feb 15 16:52:15 2005
From: gmane-schpam at joefrancia.com (Joe Francia)
Date: Tue, 15 Feb 2005 16:52:15 -0500
Subject: How can I Fill in web form and post back
In-Reply-To: <LJtQd.2010133$B07.305765@news.easynews.com>
References: <LJtQd.2010133$B07.305765@news.easynews.com>
Message-ID: <cutqpl$bru$1@sea.gmane.org>

Rigga wrote:
> Hi,
> 
> I am looking for the best way to use Python to get a web page, look for some
> particular fields on a form, fill in the fields and submit the form but I
> have no idea where to start - any pointers appreciated
> 
> many thanks
> 
> Rigga

Here's a pretty good resource:
http://www.google.com/search?q=python+fill+web+forms

-- 
Soraia: http://www.soraia.com



From steven.bethard at gmail.com  Mon Feb 28 14:24:30 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 28 Feb 2005 12:24:30 -0700
Subject: Pythonwin: Red squiggley underline and syntax error
In-Reply-To: <juadnQtUmsOo9b7fRVn-tQ@comcast.com>
References: <juadnQtUmsOo9b7fRVn-tQ@comcast.com>
Message-ID: <Kfudne3HApR08r7fRVn-2A@comcast.com>

Brent W. Hughes wrote:
> I copied and pasted some text into my Python code and then Pythowin put a 
> red squiggley underline under the two tabs at the beginning of the line. 
> What does that mean?  I've tried various things including deleting the white 
> space in front of the line and reinserting the tabs.  I've also tried 
> retyping the entire line.  Sometimes, I can get the red line to go away but 
> when I try to run the program, it gives me a syntax error on the line that 
> had the red underline.  Help!

You've probably mixed tabs with spaces in your indentation somewhere. 
Either replace all tabs with spaces or replace all spaces with tabs.

STeVe


From gdamjan at gmail.com  Mon Feb  7 13:02:43 2005
From: gdamjan at gmail.com (Damjan)
Date: Mon, 07 Feb 2005 19:02:43 +0100
Subject: Python on WWW - beginners question: what to choose?
References: <cu82v8$2f17$1@news.vol.cz>
Message-ID: <36poq3F53ll2aU1@individual.net>

> I'm satisfied with concept of mps, however It's fine that author hate
> writing HTML, but I want to; or better, I want to use Cheetah Templates -
> i think they are better for bigger sites (then homepage) as the one I want
> to write.

Also, check out simpletal (http://www.owlfish.com/software/simpleTAL/) 


-- 
damjan


From ed-no at spam-eepatents.com  Mon Feb 14 16:05:23 2005
From: ed-no at spam-eepatents.com (Ed Suominen)
Date: Mon, 14 Feb 2005 13:05:23 -0800
Subject: Scan document pages to a compressed PDF
References: <p_WdnW4O8bHNfI3fRVn-ow@centurytel.net>
Message-ID: <-7WdnW24ssPjj4zfRVn-3Q@centurytel.net>

Replying to my own post, this looks like a very promising tool:

"Pytiff is a library for using TIFF files and advanced imaging in Python."
http://pubweb.northwestern.edu/~omh221/software_projects/pytiff/pytiff.html

Ed Suominen wrote:

> I'd like to write a Python-based commandline tool that will scan pages
> with SANE, applying CCITT Group 4 compression during scanning, and produce
> a single PDF file. I would release it under GPL. Right now, I'm relying on
> a workable but inflexible shell script that pipes stuff between scanimage,
> tiffcp, tiff2ps, and ps2pdf.
> 
> What's the best way currently to do CCITT4 compression (e.g., of
> intermediate TIFF-format images) from Python? PIL doesn't seem to support
> CCITT4 compression, and the read-only patch [1] that's available won't
> help in my case. I'd like to incorporate as much as possible into the
> Python code and imported packages, rather than relying on pipes to a bunch
> of external programs.
> 
> Same question regarding SANE -- I can't seem to find the supposed PIL
> support for SANE in the release on my system. Anyone know about that, or
> alternatives?
> 
> ---
> Ed Suominen
> Registered Patent Agent
> Open-Source Software Author (yes, both...)
> Web Site: http://www.eepatents.com
> 
> [1] http://mail.python.org/pipermail/image-sig/2003-July/002354.html



From davidschein at alumni.tufts.edu  Tue Feb 15 21:05:24 2005
From: davidschein at alumni.tufts.edu (David S.)
Date: Wed, 16 Feb 2005 02:05:24 +0000 (UTC)
Subject: subprocess problem on Windows in IDLE and PythonWin
Message-ID: <loom.20050215T224329-424@post.gmane.org>

Python 2.4 on Windows XP
In the python command-line the following works fine:

>>> from subprocess import *
>>> p = Popen('dir', stdout=PIPE)

>From within IDLE or PythonWin I get the following exception:

Traceback (most recent call last):
  File "<pyshell#13>", line 1, in -toplevel-
    p = Popen('dir', stdout=PIPE)
  File "c:\python24\lib\subprocess.py", line 545, in __init__
    (p2cread, p2cwrite,
  File "c:\python24\lib\subprocess.py", line 605, in _get_handles
    p2cread = self._make_inheritable(p2cread)
  File "c:\python24\lib\subprocess.py", line 646, in _make_inheritable
    DUPLICATE_SAME_ACCESS)
TypeError: an integer is required

Note it works fine on Linux also.  I tested it with 
>>> p = Popen('ls', stdout=PIPE)
... and had no trouble.



From onurb at xiludom.gro  Mon Feb 21 05:18:55 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Mon, 21 Feb 2005 11:18:55 +0100
Subject: Moving to Python from PHP - 3 questions
In-Reply-To: <mailman.2875.1108933444.22381.python-list@python.org>
References: <mailman.2873.1108931203.22381.python-list@python.org>	<cvat62$9h0$05$1@news.t-online.com>
	<mailman.2875.1108933444.22381.python-list@python.org>
Message-ID: <4219b591$0$20680$636a15ce@news.free.fr>

Michal Migurski wrote:
>> The python-based zope application server has session management. Togther
>> with a built-in user and access rights management.
>> ...
>> This can be done in zope if you name a variable <name>:list. That then 
>> will
>> give you the variable as list regardless of the number of occurences.
> 
> 
> Thank you. My impression of Zope in the past has been that it does what 
> I need, along with 10,000 other things I don't (built in WebDAV 
> server?!),

Our web designer just *loves* it (and ZopePageTemplates too, since they 
work quite ok with it's favorite html editor...). Might not be useful to 
you, but...

> but clearly I owe it another chance. I've been initially 
> attracted to mod_python because of its raw simplicity and its apparent 
> similarity to mod_php and mod_perl, which I am familiar with. I'll give 
> Zope a try.

Zope is a great product, but hard to get into, and it's sometime just 
too big and fat for some simple things. So while it may be worth giving 
it a try, I would not recommend it for all and any project.

Now when it comes to session management and the like, there are many 
other libs/frameworks/etc based on mod_python.

This might be a good start :
http://www.python.org/topics/web/

HTH
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for 
p in 'onurb at xiludom.gro'.split('@')])"


From max at alcyone.com  Sun Feb 20 20:03:22 2005
From: max at alcyone.com (Erik Max Francis)
Date: Sun, 20 Feb 2005 17:03:22 -0800
Subject: Bug in email package?
In-Reply-To: <mailman.2876.1108934604.22381.python-list@python.org>
References: <mailman.2876.1108934604.22381.python-list@python.org>
Message-ID: <KKOdnSNVU7_HroTfRVn-3w@speakeasy.net>

Roman Suzi wrote:

> I think that if any object (from standard library at least) doesn't support
> iteration, it should clearly state so.
> 
> My guess is that 'for' causes the use of 'm[0]', which is (rightfully) an 
> error...
> 
> Can this behaviour of email be considered a bug?
> Is there a good case to iterate over something useful in a message

Why would it be a bug if the documentation never stated that the object 
was iterable?

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   Wyrd has swept all my kin / all the brave chiefs away! / Now I must
   follow them! -- Beowulf


From M.Waack at gmx.de  Mon Feb 14 16:25:45 2005
From: M.Waack at gmx.de (Mathias Waack)
Date: Mon, 14 Feb 2005 22:25:45 +0100
Subject: 64 bit Python
References: <1cd7e2-qu7.ln1@valpo.de> <cur339$c5q$1@bagan.srce.hr>
Message-ID: <pjh7e2-8a8.ln1@valpo.de>

Ivan Voras wrote:

> Mathias Waack wrote:
>> amounts of data. I figured out that a 32 bit application on HP-UX
>> cannot address more than 1 GB of memory. In fact (I think due to
>> the overhead of memory management done by python) a python
>> application cannot use much more than 500 MB of "real" data. For
>> this reason
> 
> I don't thik this is likely. Don't know about HP-UX but on some
> platforms, FreeBSD for example, there is a soft memory-cap for
> applications. By default, a single application on FreeBSD cannot
> use more than 512MB of memory, period. The limit can be modified by
> root (probably involves rebooting).

As I stated I wrote a simple C-program before. The c-program was able
to allocate a bit more than 900MB in 32 bit mode. 

My python script allocates a bunch of strings each of 1024 characters
and writes it in a cStringIO. And it fails after writing 512K of
strings. Don't know how python restricts the heap size - but I'm
fairly sure its not a restriction of the OS. 

But thats not the point, I don't want to talk about one or two
megabytes - I'm just missing some GB of heap;)

Mathias


From http  Fri Feb 18 09:34:56 2005
From: http (Paul Rubin)
Date: 18 Feb 2005 06:34:56 -0800
Subject: Solution for architecure dependence in Numeric ?
References: <67ll9mymqu.fsf@achernar.i-did-not-set--mail-host-address--so-shoot-me>
Message-ID: <7xacq2j5rj.fsf@ruckus.brouhaha.com>

Johannes Nix |Johannes.Nix at uni-oldenburg.de> writes:
> So what would you suggest ? Can I hack Numeric to assume non-native
> 32 bit integer numbers ?

I think it would be better to fix the pickle/cPickle module to
correctly unpack the 32-bit ints on your 64 bit machine.


From grante at visi.com  Wed Feb 23 09:23:04 2005
From: grante at visi.com (Grant Edwards)
Date: 23 Feb 2005 14:23:04 GMT
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cvaoft$av6$1@usenet.otenet.gr>
	<874qg6937w.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<cvcv9b$nbm$1@usenet.otenet.gr> <37uk2kF5gv38bU1@individual.net>
	<nmSSd.25321$Am3.782245@news20.bellglobal.com>
	<cvi2c5$ibu$1@usenet.otenet.gr>
Message-ID: <421c91c8$0$44647$a1866201@visi.com>

On 2005-02-23, Ilias Lazaridis <ilias at lazaridis.com> wrote:

>>>> The Essence is this one, as stated before:
>>>>
>>>> [huge copy paste of previous post]
>>>
>>> The Essence is irrelevant.
>>> -
>>> All your thread are belong to us.
>>> -
>> 
>> For great justice!
>> 
>> ;o)
>
> [EVALUATION] - E02 - Support for MinGW Open Source Compiler
> Essence:
> http://groups-beta.google.com/group/comp.lang.python/msg/5ba2a0ba55d4c102

Um, you realize that nobody in this thread takes you the least
bit seriously and people are just poking you with a stick to
watch you jump?

-- 
Grant Edwards                   grante             Yow!  An INK-LING? Sure --
                                  at               TAKE one!! Did you BUY any
                               visi.com            COMMUNIST UNIFORMS??


From steve at holdenweb.com  Thu Feb  3 08:31:24 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 03 Feb 2005 08:31:24 -0500
Subject: ModPython: passing variables between handlers?
In-Reply-To: <mailman.1813.1107436865.22381.python-list@python.org>
References: <mailman.1813.1107436865.22381.python-list@python.org>
Message-ID: <WNpMd.102689$Jk5.71154@lakeread01>

Andrew James wrote:

> Hi all,
> I'm writing an application which runs within Apache and uses mod_python 
> to provide basic authentication and return content to the user, 
> something like:
> 
> import modpython
> .....
> def handler():
>   # main part of the application starts here
>   ...
> 
> def authenhandler():
>   ...
>   # Store information about the user in an object
>   u = new User(req.user, pass)
> 
> I'd like to be able to pass the u object somehow from authenhandler to 
> handler in an elegant fashion, but without using global variables (as I 
> understand it these persist for the life of the child process which will 
> be more than one request, which is not what I want, and could be a 
> security hole).
> 
> I suppose that I could use session variables, but since this part of my 
> application provides a WebDAV server, basic authentication credentials 
> are passed on each request (so I don't really want to have to look after 
> keeping track of sessions when I don't have to). I would rather not 
> modify all my existing classes to support an  extra parameter in their 
> constructors.
> 
> What I'm really looking for is some sort of global dictionary like PHP's 
> $REQUEST or $SESSION, which I can assign freely to during the life of 
> the request *from anywhere in my application* and which gets cleaned up 
> for me automatically afterwards. Does something like this exist in 
> mod_python?
> 
> If the approach above isn't possible, what would your recommendations be 
> for a solution to this issue?
> 
RTFM ;-)

If you want these values to have the same lifetime as your requests then 
it would appear to make sense to have them be request attributes, no?

Section 4.5.3 of the mod_python docs says little else about the request 
object but """You can dynamically assign attributes to it as a way to 
communicate between handlers.""".

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From 2004b at usenet.alexanderweb.de  Sat Feb 19 11:12:55 2005
From: 2004b at usenet.alexanderweb.de (Alexander Schremmer)
Date: Sat, 19 Feb 2005 17:12:55 +0100
Subject: unicode encoding usablilty problem
References: <opsmekm2ei6yt6e7@news.cisco.com>
	<42164d01$0$4676$9b622d9e@news.freenet.de>
	<7jl5zjhz.fsf@python.net>
Message-ID: <96yte0etytwe.dlg@usenet.alexanderweb.de>

On Fri, 18 Feb 2005 21:43:52 +0100, Thomas Heller wrote:

>> Eventually, the primary string type should be the Unicode
>> string. If you are curious how far we are still off that goal,
>> just try running your program with the -U option.
> 
> Not very far - can't even call functions ;-)
> 
>>>> def f(**kw):
> ...   pass
> ...
>>>> f(**{"a": 0})
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> TypeError: f() keywords must be strings

That is possible:
>>> f(**{chr(ord("a")): 0})
>>>

WFM. SCNR,
Alexander


From tom.willis at gmail.com  Tue Feb 22 20:30:47 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Tue, 22 Feb 2005 20:30:47 -0500
Subject: searching pdf files for certain info
In-Reply-To: <cvgl0k$fqq$1@solaris.cc.vt.edu>
References: <cvfdgg$fr0$1@solaris.cc.vt.edu> <cvfg5a$6g6$1@news.mch.sbs.de>
	<cvfhe5$lcv$1@solaris.cc.vt.edu> <cvfi2q$dto$1@news.mch.sbs.de>
	<cvfk26$qb3$1@solaris.cc.vt.edu>
	<mailman.2937.1109088725.22381.python-list@python.org>
	<cvfmok$11l$1@solaris.cc.vt.edu>
	<mailman.2950.1109120060.22381.python-list@python.org>
	<cvgl0k$fqq$1@solaris.cc.vt.edu>
Message-ID: <b54d0489050222173076b62906@mail.gmail.com>

Ah that makes sense. I only see the behavior in pdftotext. ps2ascii
doesn't give me the layout , which for my purposes, I certainly need.

Thanks for the info, Looks like I'll keep searching for that silver bullet.:(


On Tue, 22 Feb 2005 20:07:50 -0500, rbt <rbt at athop1.ath.vt.edu> wrote:
> Tom Willis wrote:
> > Well sporadic spaces in strings would cause problems would it not?
> >
> > an example....
> >
> >
> > The String: "Patient Face Sheet"--->pdftotext--->"P a tie n t Face Sheet"
> >
> > I'm just curious if you see anything like that, since I really have no
> > clue about ps or pdf etc...but I have a strong desire to replace a
> > really flaky commercial tool. And if I can do it with free stuff, all
> > the better my boss will love me.
> 
> No, I do not see that type of behavior. I'm looking for strings that
> resemble SS numbers. So my strings look like this: nnn-nn-nnnn.
> 
> The ps2ascii util in ghostscript reproduces strings in the format that I
> expect. BTW, I'm not using pdftotext. I'm using *ps2ascii*.
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
Thomas G. Willis
http://paperbackmusic.net


From ola.natvig at infosense.no  Mon Feb  7 10:13:42 2005
From: ola.natvig at infosense.no (Ola Natvig)
Date: Mon, 07 Feb 2005 16:13:42 +0100
Subject: xmlentities
Message-ID: <66dkd2-6f2.ln1@pluto.i.infosense.no>

Hi all

Does anyone know a good library for transfering non standard characters 
to enity characters in html. I want characters like < and > to be 
transformed to &lt; and &gt;. And the norwegian ? to &oslash;

ola
-- 
--------------------------------------
  Ola Natvig <ola.natvig at infosense.no>
  infoSense AS / development


From stan0934 at yahoo.com  Mon Feb 28 01:21:55 2005
From: stan0934 at yahoo.com (Stan Cook)
Date: Mon, 28 Feb 2005 06:21:55 GMT
Subject: Working with dbase files
Message-ID: <7MyUd.73116$911.65438@fe2.texas.rr.com>

Does anyone know how I can access and read data 
from a dbase (.dbf) file?

Regards,

Stan


From john at grulic.org.ar  Mon Feb  7 10:23:54 2005
From: john at grulic.org.ar (John Lenton)
Date: Mon, 7 Feb 2005 12:23:54 -0300
Subject: Confused with methods
In-Reply-To: <slrnd0f07t.26q.apardon@rcpc42.vub.ac.be>
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>
	<slrnd0enor.26q.apardon@rcpc42.vub.ac.be>
	<1grmd4z.1tlm4e61650vedN%aleaxit@yahoo.com>
	<slrnd0f07t.26q.apardon@rcpc42.vub.ac.be>
Message-ID: <20050207152354.GB15714@grulic.org.ar>

On Mon, Feb 07, 2005 at 02:53:49PM +0000, Antoon Pardon wrote:
> The fact that a function in a class performs a lot of magic if
> it is called through an instance, that isn't performed otherwise,
> makes python inconsistent here. You may like the arrangement
> (and it isn't such a big deal IMO) but that doesn't make it consistent.

I vote for accepting the fact (it goes with the "practicality beats
purity" bit, because otherwise all our methods would have to start
with an @instancemethod). This doesn't justify (IMVVHO) a new keyword,
like you (was it you?) seemed to imply (do you really mean for
instancemethod (or somesuch) and classmethod to become keywords?). I
think it's fine the way it is: there's an implicit @instancemethod,
and @staticmethod (which you'd have be the default if I read you
right) has to be explicit, when in classes. I think __new__ being an
exception to this is a (minor) wart, in fact it feels like premature
optimization (how many __new__s do you write, that you can't stick a
@staticmethod in front of them?

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
Fun Facts, #14:
	In table tennis, whoever gets 21 points first wins.  That's how
	it once was in baseball -- whoever got 21 runs first won.
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From invalidemail at aerojockey.com  Sun Feb 27 01:19:44 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 26 Feb 2005 22:19:44 -0800
Subject: any Python equivalent of Math::Polynomial::Solve?
References: <just-420C1F.16423926022005@news1.news.xs4all.nl>
Message-ID: <1109485184.587035.176540@l41g2000cwc.googlegroups.com>

Just wrote:
> While googling for a non-linear equation solver, I found
> Math::Polynomial::Solve in CPAN. It seems a great little module,
except
> it's not Python... I'm especially looking for its poly_root()
> functionality (which solves arbitrary polynomials). Does anyone know
of
> a Python module/package that implements that?

If you don't have a great need for speed, you can accomplish this
easily with the linear algebra module of Numeric/numarray.   Suppose
your quintic polynomial's in the form

   a + b*x + c*x**2 + d*x**3 + e*x**4 + x**5

The roots of it are equal to the eigenvalues of the companion matrix:

  0   1   0   0   0
  0   0   1   0   0
  0   0   0   1   0
  0   0   0   0   1
 -a  -b  -c  -d  -e

It should be pretty easy to set up a Numeric matrix and call
LinearAlgebra.eigenvalues.  For example, here is a simple quintic
solver:

. from Numeric import *
. from LinearAlgebra import *
.
. def quinticroots(p):
.     cm = zeros((5,5),Float32)
.     cm[0,1] = cm[1,2] = cm[2,3] = cm[3,4] = 1.0
.     cm[4,0] = -p[0]
.     cm[4,1] = -p[1]
.     cm[4,2] = -p[2]
.     cm[4,3] = -p[3]
.     cm[4,4] = -p[4]
.     return eigenvalues(cm)


now-you-can-find-all-five-Lagrange-points-ly yr's,

-- 
CARL BANKS



From sjmachin at lexicon.net  Thu Feb  3 18:58:01 2005
From: sjmachin at lexicon.net (John Machin)
Date: 3 Feb 2005 15:58:01 -0800
Subject: Crashing Python interpreter! (windows XP, python2.3.4, 2.3.5rc1,
	2.4.0)
References: <mailman.1810.1107433431.22381.python-list@python.org>
Message-ID: <1107475081.100242.242920@f14g2000cwb.googlegroups.com>


Leeuw van der, Tim wrote:
> >
> >
> > -----Original Message-----
> > From: python-list-bounces+tim.leeuwvander=nl.unisys.com at python.org
on behalf of John Machin
> > Sent: Thu 2/3/2005 12:00 PM
> > To: python-list at python.org
> > Subject: Re: Crashing Python interpreter! (windows XP, python2.3.4,
2.3.5rc1,2.4.0)
> >
> >
> > Leeuw van der, Tim wrote:
> > >
> > >> > Do you have a file called drwtsn32.log anywhere on your
computer?
> > >
> > > No, unfortunately I cannot find such file anywhere on my
computer....
> > >
> > > What do I do to get such file? Or anything equally useful?
> > >
> >
> > On my Windows 2000 box, just crash something :-)
> >
> >
> > Perhaps this may help:
> >
> >
http://www.windowsnetworking.com/kbase/WindowsTips/Windows2000/RegistryTips/RegistryTools/DrWatson.html
> >
>
> Using this URL, I found the log file and it's about 1Gb big...

Yeah, well, it's a *LOG* file -- unless you fiddle with the registry
settings (not recommended), you get one lot of guff per crash. But 1
Gb????

> I'll have to find out what is the useful part of it (or remove it and
crash again).

The useful part would be the tail of the file. Remove it? It may
contain evidence useful for other problems (that you didn't know you
were having). Try rename.

> I don't know why searching all drives using windows 'search' did not
find the file!

Possibilities:
1. You have a virus that renames the drwtsn32.log file for the duration
of a search.
2. Emanations from UFOs are affecting computer circuitry in your
neighbourhood.
3. Microsoft programmers stuffed up.
4. You had a typo.

>
> When I have a usefull crashdump, what should I do? Attach to e-mail
and post it here?

You could eyeball it to see if it gave you a clue first. Failing that,
just post a copy of the part(s) from just ONE crash that look something
like this:

*----> Stack Back Trace <----*

FramePtr ReturnAd Param#1  Param#2  Param#3  Param#4  Function Name
0012D6F8 77F8819B 7803A700 7C34F639 7803A730 7C36B42C
ntdll!RtlpWaitForCriticalSection
0012D73C 1E0A73CE 7803A710 00000000 00AE0900 00000000
ntdll!ZwCreateThread
7C36C576 E87C3822 FFFD5D89 E80C75FF FFFE3081 FC658359
!PyTime_DoubleToTimet
B8680C6A 00000000 00000000 00000000 00000000 00000000 <nosymbols>


> Should I include the user.dmp file too?

Look at it; how big is it? [my latest is 13MB for @#$% sake] Is it in
ascii or binary? Does it look useful? What proportion of people who get
this newsgroup/mailing-list via *E-MAIL* will be overjoyed to receive
it?
Are you sure you will not be splattering company-confidential data all
over the Internet?

>
> Should I do the same for both python 2.3.5r1 and python 2.4? Or is it
sufficient to do so for Python 2.4?

If you are sending only stack back trace snippets as above, then send
both just in case they are different.



From tundra at tundraware.com  Wed Feb  2 18:38:13 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 02 Feb 2005 18:38:13 EST
Subject: Generating .pyc/.pyo from a make file
In-Reply-To: <RldMd.102645$Jk5.24461@lakeread01>
References: <4308d2-0801.ln1@eskimo.tundraware.com>
	<42015a85_1@news.arcor-ip.de>
	<dh38d2-at71.ln1@eskimo.tundraware.com>
	<4201607f_2@news.arcor-ip.de> <RldMd.102645$Jk5.24461@lakeread01>
Message-ID: <2h48d2-8481.ln1@eskimo.tundraware.com>

Steve Holden wrote:

> Roland Heiber wrote:
> 
>> Tim Daneliuk wrote:
>>
>>> It does - thanks.  One more question:  Are pyc and pyo file portable
>>> across operating systems?  I suspect not since I generated a pyo
>>> on a FreeBSD machine that will not run on a Win32 machine.  I was
>>> under the impression that "compiled" meant optimized byte code that
>>> was portable across implementations, but it looks to not be the case...
>>>
>>
>> Hi,
>>
>> ..pyc's should be, cause it's standard python-bytecode, if you use 
>> massive optimizations it depends not on the os but on the underlying 
>> cpu/architecture ...
>>
>> So long, Roland
> 
> 
> You probably tried to use a bytecode file from *one* version of Python 
> with an interpreter of another version. Python actually checks the first 
> four bytes of the .pyc file for a compatible "magic number" before 
> accepting the file for execution.
> 
> regards
>  Steve

Aha!  Exactly ... and that makes perfect sense too.  D'oh!  I guess a better
distribution strategy would be to have the installation program generate the pyo
file at installation time...

Thanks -

-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From bdesth.quelquechose at free.quelquepart.fr  Wed Feb  2 08:38:59 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 02 Feb 2005 14:38:59 +0100
Subject: CONTEST - What is the (best) solution?
In-Reply-To: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
References: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
Message-ID: <4200d5c5$0$535$636a15ce@news.free.fr>

python at hope.cz a ?crit :
> In a file there can be several dictionaries like this
(snip)
> I need to read only the the first and the last dictionaries.What is a
> best solution?

Depends on your definition of 'best solution'.


From mad.mick at gmx.de  Fri Feb  4 18:14:50 2005
From: mad.mick at gmx.de (Mick Krippendorf)
Date: Sat, 5 Feb 2005 00:14:50 +0100
Subject: returning True, False or None
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com><5OOMd.12446$W16.3365@trndny07><5sydnV6im6jgJp7fRVn-qQ@comcast.com>
	<mailman.1914.1107547292.22381.python-list@python.org>
Message-ID: <36idhbF52h68aU1@individual.net>

Fredrik Lundh wrote:
> Steven Bethard wrote:
>> Raymond Hettinger wrote:
>>> 
>>> return max(lst)
>> 
>> Very clever!  Thanks!
> 
> too clever.  boolean > None isn't guaranteed by the language
> specification: 
> 
>     http://docs.python.org/ref/comparisons.html
> 
>     "... objects of different types always compare unequal, and are
>     ordered consistently but arbitrarily. /.../ In the future, the
>     comparison rules for objects of different types are likely to
>     change. ..." 

Then maybe like this:

 >>> def max_of_two_with_None_less_than_any_other_object(e1, e2):
 ...     if e1 == None:
 ...         return e2
 ...     elif e2 == None:
 ...         return e1
 ...     else:
 ...         return max(e1, e2)

 >>> reduce(max_of_two_with_None_less_than_any_other_object, lst)

Mick.


From kbk at shore.net  Thu Feb  3 23:41:59 2005
From: kbk at shore.net (Kurt B. Kaiser)
Date: Thu, 3 Feb 2005 23:41:59 -0500 (EST)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200502040442.j144fxhi015740@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  284 open ( +4) /  2748 closed ( +1) /  3032 total ( +5)
Bugs    :  804 open ( +1) /  4812 closed (+13) /  5616 total (+14)
RFE     :  167 open ( +0) /   142 closed ( +1) /   309 total ( +1)

New / Reopened Patches
______________________

Patch for Lib/bsddb/__init__.py to work with modulefinder  (2005-01-31)
       http://python.org/sf/1112812  opened by  Tony Meyer

New tutorial tests in test_generators.py  (2005-01-31)
       http://python.org/sf/1113421  opened by  Francis Girard

Add SSL certificate validation  (2005-02-01)
       http://python.org/sf/1114345  opened by  James Eagan

support PY_LONGLONG in structmember  (2005-02-02)
       http://python.org/sf/1115086  opened by  Sam Rushing

Add SSL certificate validation  (2005-02-03)
       http://python.org/sf/1115631  opened by  James Eagan

Patches Closed
______________

Make history recall a-cyclic  (2004-03-11)
       http://python.org/sf/914546  closed by  kbk

New / Reopened Bugs
___________________

Cannot ./configure on FC3 with gcc 3.4.2  (2005-01-26)
CLOSED http://python.org/sf/1110007  reopened by  liturgist

cgi.FieldStorage memory usage can spike in line-oriented ops  (2005-01-30)
       http://python.org/sf/1112549  opened by  Chris McDonough

patch 1079734 broke cgi.FieldStorage w/ multipart post req.  (2005-01-31)
       http://python.org/sf/1112856  opened by  Irmen de Jong

ioctl has problems on 64 bit machines  (2005-01-31)
       http://python.org/sf/1112949  opened by  Stephen Norris

move_file()'s return value when dry_run=1 unclear  (2005-01-31)
       http://python.org/sf/1112955  opened by  Eelis

Please add do-while guard to Py_DECREF etc.  (2005-01-31)
       http://python.org/sf/1113244  opened by  Richard Kettlewell

OSATerminology still semi-broken  (2005-01-31)
       http://python.org/sf/1113328  opened by  has

document {m} regex matcher wrt empty matches  (2005-01-31)
       http://python.org/sf/1113484  opened by  Wummel

keywords in keyword_arguments not possible  (2005-02-01)
CLOSED http://python.org/sf/1113984  opened by  Christoph Zwerschke

inicode.decode  (2005-02-01)
CLOSED http://python.org/sf/1114093  opened by  Manlio Perillo

copy.py bug  (2005-02-02)
       http://python.org/sf/1114776  opened by  Vincenzo Di Somma

webbrowser doesn't start default Gnome browser by default  (2005-02-02)
       http://python.org/sf/1114929  opened by  Jeremy Sanders

eval !  (2005-02-02)
CLOSED http://python.org/sf/1115039  opened by  Andrew Collier

Built-in compile function with PEP 0263 encoding bug  (2005-02-03)
       http://python.org/sf/1115379  opened by  Christoph Zwerschke

os.path.splitext don't handle unix hidden file correctly  (2005-02-04)
       http://python.org/sf/1115886  opened by  Jeong-Min Lee

Bugs Closed
___________

broken link in tkinter docs  (2005-01-24)
       http://python.org/sf/1108490  closed by  jlgijsbers

recursion core dumps  (2005-01-26)
       http://python.org/sf/1110055  closed by  tim_one

install_lib fails under Python 2.1  (2004-11-02)
       http://python.org/sf/1058960  closed by  loewis

Double __init__.py executing  (2004-06-22)
       http://python.org/sf/977250  closed by  loewis

Cannot ./configure on FC3 with gcc 3.4.2  (2005-01-26)
       http://python.org/sf/1110007  closed by  liturgist

IDLE hangs due to subprocess  (2004-12-28)
       http://python.org/sf/1092225  closed by  kbk

Empty curses module is loaded in win32  (2004-07-12)
       http://python.org/sf/989333  closed by  tebeka

Tab / Space Configuration Does Not Work in IDLE  (2003-08-05)
       http://python.org/sf/783887  closed by  kbk

Negative numbers to os.read() cause segfault  (2004-12-01)
       http://python.org/sf/1077106  closed by  mwh

Time module missing from latest module index  (2005-01-25)
       http://python.org/sf/1109523  closed by  montanaro

keywords in keyword_arguments not possible  (2005-02-01)
       http://python.org/sf/1113984  closed by  rhettinger

unicode.decode  (2005-02-01)
       http://python.org/sf/1114093  closed by  lemburg

eval !  (2005-02-02)
       http://python.org/sf/1115039  closed by  rhettinger

New / Reopened RFE
__________________

All Statements Should Have Return Values (Syntax Proposal)  (2005-02-01)
CLOSED http://python.org/sf/1114404  opened by  Lenny Domnitser

RFE Closed
__________

All Statements Should Have Return Values (Syntax Proposal)  (2005-02-01)
       http://python.org/sf/1114404  closed by  goodger



From Serge.Orlov at gmail.com  Tue Feb  1 15:10:59 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: 1 Feb 2005 12:10:59 -0800
Subject: Printing Filenames with non-Ascii-Characters
In-Reply-To: <36a3ikF4uk8r0U1@individual.net>
References: <36a3ikF4uk8r0U1@individual.net>
Message-ID: <1107288659.244692.40390@c13g2000cwb.googlegroups.com>

Marian Aldenh?vel wrote:
> Hi,
>
> I am very new to Python and have run into the following problem. If I
do
> something like
>
>    dir = os.listdir(somepath)
>    for d in dir:
>       print d
>
> The program fails for filenames that contain non-ascii characters.
>
>    'ascii' codec can't encode characters in position 33-34:
>
> I have noticed that this seems to be a very common problem. I have
read a lot
> of postings regarding it but not really found a solution. Is there a
simple
> one?

No :) You're trying to deal with legacy terminals, you can't reliably
print unicode characters across various terminals. It's not really
Python's fault.

>
> What I specifically do not understand is why Python wants to
interpret the
> string as ASCII at all. Where is this setting hidden?

http://www.python.org/moin/PrintFails Let me know if it's not clear. It
would be great if other people fixed/improved this page.

> I am running Python 2.3.4 on Windows XP and I want to run the program
on
> Debian sarge later.

You need cross platform terminal that supports unicode output.
Sergey.



From http  Thu Feb  3 22:18:19 2005
From: http (Paul Rubin)
Date: 03 Feb 2005 19:18:19 -0800
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<kavad2-59d.ln1@eskimo.tundraware.com>
Message-ID: <7xlla5t3lw.fsf@ruckus.brouhaha.com>

Tim Daneliuk <tundra at tundraware.com> writes:
> I worked for an Airline computer reservation system (CRS) for almost a
> decade. There is nothing about today's laptops that remotely comes close
> to the power of those CRS systems, even the old ones. CRS systems are
> optimized for extremely high performance I/O and use an operating system
> (TPF) specifically designed for high-performance transaction processing.

Yeah, I've been interested for a while in learning a little bit about
how TPF worked.  Does Gray's book that you mention say much about it?

I think that the raw hardware of today's laptops dwarfs the old big
iron.  An S/360 channel controller may have basically been a mainframe
in its own right, but even a mainframe in those days was just a few
MIPS.  The i/o systems and memory are lots faster too, though not by
nearly the ratio by which storage capacity and cpu speed have
increased.  E.g., a laptop disk these days has around 10 msec latency
and 20 MB/sec native transfer speed, vs 50+ msec and a few MB/sec for
a 3330-level drive (does that sound about right?.  

> Web servers are very sessions oriented: make a connection-pass the
> unit of work-drop the connection. This is inherently slow (and not
> how high performance TP is done). Moreover, really high perfomance
> requires a very fine level of I/O tuning on the server - at the CRS
> I worked for, they performance people actually only populated part
> of the hard drives to minimize head seeks.

Today I think most seeks can be eliminated by just using ram or SSD
(solid state disks) instead of rotating disks.  But yeah, you wouldn't
do that on a laptop.

> For a good overview of TP design, see Jim Gray's book, "Transaction
> Processing: Concepts and Techniques".

Thanks, I'll look for this book.  Gray of course is one of the
all-time database gurus and that book is probably something every
serious nerd should read.  I've probably been a bad boy just for
having not gotten around to it years ago.

> P.S. AFAIK the first CRS systems of any note came into being in the 1970s not
>       the 1960s, but I may be incorrect in the matter.

>From <http://en.wikipedia.org/wiki/Sabre_%28computer_system%29>:

    The system [SABRE] was created by American Airlines and IBM in the
    1950s, after AA president C. R. Smith sat next to an IBM sales
    representative on a transcontinental flight in 1953. Sabre's first
    mainframe in Briarcliff Manor, New York went online in 1960. By
    1964, Sabre was the largest private data processing system in the
    world. Its mainframe was moved to an underground location in
    Tulsa, Oklahoma in 1972.

    Originally used only by American, the system was expanded to travel
    agents in 1976. It is currently used by a number of companies,
    including Eurostar, SNCF, and US Airways. The Travelocity website is
    owned by Sabre and serves as a consumer interface to the system.


From sjmachin at lexicon.net  Thu Feb 24 03:29:18 2005
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 24 Feb 2005 19:29:18 +1100
Subject: Shift Confusion
References: <1109225214.430739.259600@l41g2000cwc.googlegroups.com>
Message-ID: <u81r111a8v82rt2uqfqd5me0obbua40k2p@4ax.com>

On 23 Feb 2005 22:06:54 -0800, "Kamilche" <klachemin at comcast.net>
wrote:

>I'm trying to pack two characters into a single byte, and the shifting
>in Python has me confused.
>
>Essentially, it should be possible to use a 'packed string' format in
>Python, where as long as the characters you're sending are in the ASCII
>range 0 to 127, two will fit in a byte.

It should be possible, but only in a realm where phlogiston and
perpetual motion machines exist.

To hold one ASCII character 0 <= ord(c) < 128, you need log2(128) == 7
bits. There are 8 bits in a byte. Therefore you can hold only 8/7.0 ==
1.14... ASCII characters in a standard 8-bit byte. If there is such a
thing as a 14-bit byte, that's news to me.

Other things you are doing wrong:

1. Using "L".lower() as a variable name. Some fonts make it extremely
hard to work out what is what in "l1l1l1l1l1l1ll1l1l" -- can you read
that???

2. Hmmm:
 >>> "chr((y << 1) | x))".upper()
'CHR((Y << 1) | X))'

OK so that's a one, not the length of your string, as augmented.
Either would be be wrong. Shifting a character left ONE bit (or,
changing the emphasis, one BIT) and then ORing in another character
would be vaguely reasonable only if you were writing a hash function.

3. Supposing this modern alchemy had worked: when unpacking, how would
you know whether the string was originally (say) seven characters long
or 8 characters long?

4. Your unpacking routine appears to be trying to unpack two 4-bit
items (nibbles) out of a byte, but is not doing (temp & 0xf0) >> 4 for
the top nibble as one might expect ..... aaahhh!!?? are you trying to
emulate packed decimal???

5. Not writing down a clear statement of what you are trying to do,
followed by examples of input and expected output. This latter goes by
fancy names like "test-driven development"; when I started programming
it was known as "common sense".

6. Not using Python interactively to explore what's going on:

>>> ord('x')
120
>>> ord('y')
121
>>> (120 << 1)
240
>>> (120 << 1) | 121
249
>>>

HTH,
John


From crankycoder at gmail.com  Fri Feb 25 10:39:56 2005
From: crankycoder at gmail.com (Victor Ng)
Date: Fri, 25 Feb 2005 10:39:56 -0500
Subject: Is there way to determine which class a method is bound to?
In-Reply-To: <cvng80$780$00$1@news.t-online.com>
References: <mailman.3053.1109342775.22381.python-list@python.org>
	<cvng80$780$00$1@news.t-online.com>
Message-ID: <a8bfd74c050225073975c5c350@mail.gmail.com>

Awesome!  I didn't see the getmro function in inspect - that'll do the
trick for me.  I should be able to just look up the methodname in each
of the class's __dict__ attributes.

vic


On Fri, 25 Feb 2005 16:29:25 +0100, Peter Otten <__peter__ at web.de> wrote:
> Victor Ng wrote:
> 
> > I'm doing some evil things in Python and I would find it useful to
> > determine which class a method is bound to when I'm given a method
> > pointer.
> >
> > For example:
> >
> > class Foo(object):
> >     def somemeth(self):
> >         return 42
> >
> > class Bar(Foo):
> >     def othermethod(self):
> >         return 42
> >
> >
> > Is there some way I can have something like :
> >
> >    findClass(Bar.somemeth)
> >
> > that would return the 'Foo' class, and
> >
> >    findClass(Bar.othermethod)
> >
> > would return the 'Bar' class?
> >
> > vic
> 
> >>> import inspect
> >>> class Foo(object):
> ...     def foo(self): pass
> ...
> >>> class Bar(Foo):
> ...     def bar(self): pass
> ...
> >>> def get_imp_class(method):
> ...     return [t for t in inspect.classify_class_attrs(method.im_class) if
> t[-1] is method.im_func][0][2]
> ...
> >>> [get_imp_class(m) for m in [Bar().foo, Bar().bar, Bar.foo, Bar.bar]]
> [<class '__main__.Foo'>, <class '__main__.Bar'>, <class '__main__.Foo'>,
> <class '__main__.Bar'>]
> 
> but with this approach you will get into trouble as soon as you are using
> the same function to define multiple methods. There may be something in the
> inspect module more apt to solve the problem -- getmro() perhaps?
> 
> Peter
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From gabriel.barros at gmail.com  Tue Feb  8 18:19:58 2005
From: gabriel.barros at gmail.com (Gabriel B.)
Date: Tue, 8 Feb 2005 21:19:58 -0200
Subject: Big development in the GUI realm
In-Reply-To: <cub12p$pke$1@achot.icm.edu.pl>
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<4207c8db$0$21623$a1866201@visi.com> <cub12p$pke$1@achot.icm.edu.pl>
Message-ID: <5175a81c05020815194228af51@mail.gmail.com>

> However, imagine simple situation:
> 1. I write proprietary program with open plugin api. I even make the api
> itself public domain. Program works by itself, does not contain any
> GPL-ed code.

No need to continue. You write something that uses a plugin, Eolas
sues you. Don't have to mind about trolltech


From rkern at ucsd.edu  Tue Feb  8 04:23:42 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Tue, 08 Feb 2005 01:23:42 -0800
Subject: Big development in the GUI realm
In-Reply-To: <mailman.2149.1107853311.22381.python-list@python.org>
References: <mailman.2123.1107820051.22381.python-list@python.org><4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com><cu95nd$7cr$1@news1.ucsd.edu><6h7g0113up1v76k7qkad7bt17os1q73510@4ax.com><4208237b$0$21623$a1866201@visi.com>	<cu98n4$833$1@news1.ucsd.edu><4208373e$0$21620$a1866201@visi.com>	<cu9eg0$9jb$1@news1.ucsd.edu>
	<mailman.2149.1107853311.22381.python-list@python.org>
Message-ID: <cua0eq$ecj$1@news1.ucsd.edu>

Fredrik Lundh wrote:
> Robert Kern wrote:
> 
> 
>>Believe me, I share your frustration every time this issue comes up. However, I think it's best to 
>>follow Robert Heinlein's maxim:
>>
>> "Never attribute to malice what can adequately be explained by stupidity."
> 
> 
> that's Hanlon, not Heinlein.  to be on the safe side, I won't attempt to
> attribute your mistake to anything.

Fair enough. The only time I've seen it in dead-tree print was in 
Heinlein's _Time Enough For Love_, unattributed to anyone else. 
Googlespace seems to be not entirely sure whether "Hanlon" is real or is 
a corruption of "Heinlein". Googling for quote attributions is a tricky 
proposition at best, though.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From subopt at gmail.com  Mon Feb 28 13:49:08 2005
From: subopt at gmail.com (subopt at gmail.com)
Date: 28 Feb 2005 10:49:08 -0800
Subject: module/import question
Message-ID: <1109616548.886268.211820@z14g2000cwz.googlegroups.com>

I'm trying to import Logilab's constraint module like this:

    from logilab.constraint import *

from within a Python interactive session. The module is not installed
correctly on our system, and it won't be, so i adjusted my PYTHONPATH,
added an empty __init__.py file, then started up an interactive
session.
When i do the above import i get:

    Traceback (most recent call last):
      File "<stdin>", line 1, in ?
      File "/afs/big/long/freakin/path/to/dl/__init__.py",line 23,in ?

    ImportError: No module named constraint.propagation

the first time i do it, then the 2nd time it succeeds w/o a complaint.
The adjustment to my PYTHONPATH var was to append :

    afs/big/long/freakin/path/to/dl

to the previous value. Any idea what i'm doing wrong?

thanks in advance,
E



From lordchaica at free.fr  Mon Feb  7 07:23:49 2005
From: lordchaica at free.fr (chaica)
Date: Mon, 07 Feb 2005 12:23:49 +0000
Subject: Tar module issue
Message-ID: <1107779029.4774.19.camel@desktop>

Hi, 

chaica at desktop chaica $ python
Python 2.4 (#1, Jan 10 2005, 22:28:10) 
[GCC 3.2.3 20030422 (Gentoo Linux 1.4 3.2.3-r3, propolice)] on linux2

I'm using tarfile module to create an archive. For my example I'm using
Amsn file and directory tree.
My variables are like these ones: 
path = /home/chaica/downloads/amsn-0_94/skins/Tux/smileys/shades.gif
fileName = amsn-0_94/skins/Tux/smileys/shades.gif
tar.add( path, fileName )

and while untaring my archive with tar jxvf I've random errors :
tar: amsn-0_94/lang/genlangfiles.c: Cannot hard link to
`amsn-0_94/lang/genlangfiles.c': No such file or directory

I checked google and saw that errors like these ones could occur when
you use global path while taring, but I'm not, using fileName which is
local. 

Thx

-- 
chaica <lordchaica at free.fr>



From daniel.dittmar at sap.corp  Mon Feb 28 11:38:16 2005
From: daniel.dittmar at sap.corp (Daniel Dittmar)
Date: Mon, 28 Feb 2005 17:38:16 +0100
Subject: My C module crashes
In-Reply-To: <mailman.3139.1109606120.22381.python-list@python.org>
References: <mailman.3139.1109606120.22381.python-list@python.org>
Message-ID: <cvvhf2$664$1@news.sap-ag.de>

Egil Moeller wrote:
> I've written a C-module for Python, and it works as intended, but
> obviously does something wrong with its memmory management (refference
> counting), as it causes Python to segfault now and then (randomly,
> whey :S)

You can atry to use the Python function sys.getrefcount. Print the 
refcount of the parameter values before and after your extension gets 
called and print the refcount of the return value (s). I once forgot to 
increment the refcount of the None object which was put into the return 
tuple.

If you pass a list as a parameter, you should also print the refcounts 
of the list elements etc.

Daniel Dittmar


From jdhunter at ace.bsd.uchicago.edu  Wed Feb 16 11:19:37 2005
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Wed, 16 Feb 2005 10:19:37 -0600
Subject: Getting milliseconds in Python
In-Reply-To: <1108571009.698970.152020@z14g2000cwz.googlegroups.com>
	("mjs7231"'s message of "16 Feb 2005 08:23:29 -0800")
References: <1108565135.167562.196830@z14g2000cwz.googlegroups.com>
	<37h5epF5ck38lU2@individual.net>
	<1108571009.698970.152020@z14g2000cwz.googlegroups.com>
Message-ID: <m3oeekjx46.fsf@peds-pc311.bsd.uchicago.edu>

>>>>> "mjs7231" == mjs7231  <mjs7231 at gmail.com> writes:

    mjs7231> This is no good, I am looking for milliseconds, not
    mjs7231> seconds.. as stated above.

Well seconds/1000.0 = millseconds -- or are you worries about floating
point error?

7 >>> from datetime import datetime
8 >>> dt = datetime.now()
9 >>> dt.microsecond
Out[9]: 20222

Converting to milliseconds is left as an exercise for the reader...

See also the timeit module...


JDH


From grante at visi.com  Wed Feb  2 21:01:48 2005
From: grante at visi.com (Grant Edwards)
Date: 03 Feb 2005 02:01:48 GMT
Subject: how about writing some gui to a known console application
References: <1107294520.224155.131640@f14g2000cwb.googlegroups.com>
	<41fffb59$0$21637$a1866201@visi.com>
	<pan.2005.02.01.23.06.38.622308@jerf.org>
Message-ID: <4201860c$0$21602$a1866201@visi.com>

On 2005-02-01, Jeremy Bowers <jerf at jerf.org> wrote:
> On Tue, 01 Feb 2005 21:57:45 +0000, Grant Edwards wrote:
>
>> On 2005-02-01, alexrait1 <alexrait at gmail.com> wrote:
>> 
>>> Do something useful... (at least for me) For instance I need a gtk
>>> frontend for pgp. So here you can have an opportunity to learn both
>>> pyGTK and pgp. A lot of python code... :)
>> 
>> Um, to whom are you addressing your commands?
>
> Presumably the "Suggesion[sic] for an undergrad final year project in
> Python" thread.

Ah yes. The article to which I posted a follow-up wasn't part
of a thread.  I now see there was a different thread with the
same topic.

-- 
Grant Edwards                   grante             Yow!  I have a very good
                                  at               DENTAL PLAN. Thank you.
                               visi.com            


From michele.simionato at gmail.com  Fri Feb 11 05:55:28 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 11 Feb 2005 02:55:28 -0800
Subject: namespaces module (a.k.a. bunch, struct, generic object,
	etc.) PEP
References: <GaudndOHLML3M5bfRVn-vg@comcast.com>
	<pan.2005.02.10.15.10.26.594432@jerf.org>
Message-ID: <4edc17eb.0502110255.1554217b@posting.google.com>

Jeremy Bowers <jerf at jerf.org> wrote in message news:<pan.2005.02.10.15.10.26.594432 at jerf.org>...
> On Thu, 10 Feb 2005 11:56:45 -0700, Steven Bethard wrote:
> 
> > In the "empty classes as c structs?" thread, we've been talking in some
> > detail about my proposed "generic objects" PEP.  Based on a number of
> > suggestions, I'm thinking more and more that instead of a single
> > collections type, I should be proposing a new "namespaces" module instead.
> 
> Context: I've never been excited by this proposal.
> 
> But I am intrigued to note that with a couple of differences, you've now
> converged on a module I've already written for my own use, which I called
> a Registry. I actually subclassed 'dict', added some methods to use
> dotted-access as you describe, and added some methods for accessing and
> initializing a deeper key (basically a "get" that can handle hierarchy)
> and a couple of other things.
> 
> There are worse things for application config storing than a pickled
> Namespace. (Not human readable, but if you don't care about that, as I
> generally don't, it's close to usable.)

FWIW, you can count me about the people who (re)wrote this same thing
(actually with some difference, since I wanted to keep the order, so
I used nested lists instead of nested dictionaries, but the idea was
similar). I would welcome some module in the standard library to store
hierarchical data.

     Michele Simionato


From ncoghlan at iinet.net.au  Fri Feb  4 08:29:13 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 04 Feb 2005 23:29:13 +1000
Subject: Is there a market for python developers?
In-Reply-To: <7x3bwdxzya.fsf@ruckus.brouhaha.com>
References: <1107440354.317628.221090@g14g2000cwa.googlegroups.com>
	<7x3bwdxzya.fsf@ruckus.brouhaha.com>
Message-ID: <420378A9.6020905@iinet.net.au>

Paul Rubin wrote:
> 2) Can using Python make you more marketable as a programmer?
> Certainly it can.  You can often get things done faster in Python than
> in other languages, and getting things done always helps your
> marketability.  Lots of times the customer just needs to get some task
> completed, and they don't care whether you use Python or some other
> language.  And using Python can result in such a big productivity gain
> as to really help you score points with your employer or customer.

Hear, hear! I'm primarily working as a hardware interface engineer, yet a lot of 
the code I write at the moment is in Python. . .

Why?

Because I can write powerful test apps *really* quickly, and nobody really cares 
what language they're written in (the important thing is whether or not the 
hardware is doing the right thing, and Python makes it possible to automate both 
the execution of the tests and the post-analysis of the generated data).

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From xah at xahlee.org  Thu Feb 10 17:51:24 2005
From: xah at xahlee.org (Xah Lee)
Date: 10 Feb 2005 14:51:24 -0800
Subject: [perl-python] combinatorics fun
Message-ID: <1108075884.250995.62520@g14g2000cwa.googlegroups.com>

a year ago i wrote this perl program as part of a larger program.

as a exercise of fun, let's do a python version. I'll post my version
later today.

=pod

combo(n) returns a collection with elements of pairs that is all
possible combinations of 2 things from n. For example, combo(4)
returns {'3,4' => ['3',4],'1,2' => [1,2],'1,3' => [1,3],'1,4' =>
[1,4],'2,3' => ['2',3],'2,4' => ['2',4]}; Hash form is returned
instead of array for this program.

=cut

sub combo ($) {
    my $max=$_[0];
    my %hh=();
    for (my $j=1; $j < $max; ++$j) {
        for (my $i=1; $i <= $max; ++$i) {
            my $m = (($i+$j)-1)%$max+1;
            if ($i < $m){ $hh{"$i,$m"}=[$i,$m];}
        }
    }
    return \%hh;
}


use Data::Dumper;
$Data::Dumper::Indent=0;
print Dumper combo(5);


This is Perl-Python a-day. To subscribe, see
http://xahlee.org/perl-python/python.html

Xah
xah at xahlee.org
http://xahlee.org/PageTwo_dir/more.html



From removethis.kartic.krishnamurthy at gmail.com  Fri Feb 25 08:45:09 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Fri, 25 Feb 2005 13:45:09 GMT
Subject: how to use property
In-Reply-To: <1109327145.250209.203720@o13g2000cwo.googlegroups.com>
References: <1109327145.250209.203720@o13g2000cwo.googlegroups.com>
Message-ID: <FZFTd.39518$H05.29813@twister.nyroc.rr.com>

neutrinman at myrealbox.com said the following on 2/25/2005 5:25 AM:
> My question is how should I use "property" which wraps up
> __get_channel() and __set_channel()in the following program.
> I tried the program that written below, and it worked. Then I tried:
>     channel = property(__get_channel,__set_channel) as in comment 1, 2,
> and 3,
> 
> but it generates the error:
>     Traceback (most recent call last):
>   File "C:/WINDOWS/desktop/test.py", line 41, in -toplevel-
>     main()
>   File "C:/WINDOWS/desktpo/test.py", line 37, in main
>     tv.change_channel(choice)
>   File "C:/WINDOWS/desktop/test.py", line 27, in change_channel
>     self.channel(choice)
> TypeError: 'int' object is not callable
> 
> I am now studying class, so want to use property.
> This program simulates changing channel number 1 through 10 on TV.
> How should I use property here?
> 
> 	def change_channel(self, choice):
>                 self.__set_channel(choice)
>                 print self.__get_channel()
> 
>                 #comment2: self.channel(choice)


You see comment#2... You say self.channel(choice). self.channel is an
int object that you are trying to call - channel(choice) - and that is
what your exception states when it says 'int object is not callable'.

You probably meant self.channel = choice

Also, there is a problem in your posted version. You have not defined
volume before usage. So I added it to __init__(..,.., volume=120) to
make it work.

Cheers,
-Kartic


From idadesub at gmail.com  Wed Feb  2 21:18:27 2005
From: idadesub at gmail.com (Erick)
Date: 2 Feb 2005 18:18:27 -0800
Subject: streaming a file object through re.finditer
In-Reply-To: <mailman.1785.1107396839.22381.python-list@python.org>
References: <1107396145.400036.271010@g14g2000cwa.googlegroups.com>
	<mailman.1785.1107396839.22381.python-list@python.org>
Message-ID: <1107397107.667600.326820@o13g2000cwo.googlegroups.com>

True, but it doesn't work with multiline regular expressions :(

-e



From deetsNOSPAM at web.de  Tue Feb  1 10:49:23 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Tue, 01 Feb 2005 16:49:23 +0100
Subject: Next step after pychecker
References: <41ff0308$0$6503$636a15ce@news.free.fr>
	<7xis5cq5bj.fsf@ruckus.brouhaha.com>
	<tyffz0gmtpo.fsf@pcepsft001.cern.ch>
	<cto5b9$hpi$1@swifty.westend.com>
Message-ID: <369mivF4ubv6mU1@individual.net>

> But it can be useful to restrict type variety in certain situations
> e.g. prime number calculation :) And it would probably also be useful
> to check violations of restrictions before running the program in
> normal mode.

But that's what (oca)ml and the like do - they exactly don't force you to
specify a type, but a variable has an also variable type, that gets
inferned upon the usage and is then fixed.

-- 
Regards,

Diez B. Roggisch


From nav+posts at bandersnatch.org  Sun Feb 20 19:16:51 2005
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: Sun, 20 Feb 2005 19:16:51 -0500
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cvaoft$av6$1@usenet.otenet.gr>
Message-ID: <874qg6937w.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>

Ilias Lazaridis <ilias at lazaridis.com> writes:

> Now it's really time to close this thread.

I suspect this will fall of deaf ears, but I have to mention that you
do not get to "close threads" on Usenet. You can excuse yourself from
this one and stop replying to comments, but you don't get to
unilaterally declare a discussion over.

Just not how it works, though in this case an exception might be
welcomed...

Nick

-- 
#  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this to a python
print reduce(lambda x,y:x+chr(ord(y)-1),' Ojdl!Wbshjti!=obwAcboefstobudi/psh?')


From tdelaney at avaya.com  Mon Feb 14 01:51:54 2005
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Mon, 14 Feb 2005 17:51:54 +1100
Subject: custom classes in sets
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE0252035E@au3010avexu1.global.avaya.com>

vegetax wrote:

>   def __hashcode__(s): return s.path.__hashcode__()

Try __hash__ ...

Tim Delaney


From Kevin.Smith at sas.com  Thu Feb  3 14:02:12 2005
From: Kevin.Smith at sas.com (Kevin Smith)
Date: 3 Feb 2005 19:02:12 GMT
Subject: Why does super() require the class as the first argument?
Message-ID: <20050203140230680-0500@braeburn.themorgue.org>

I like the idea of the super() function, but it doesn't seem to solve 
the problem that I'm trying to fix.  I don't like hard-coding in calls 
to super classes using their names:

class A(object):
    def go(self):
        ...

class B(A):
    def go(self):
        ...
        A.go(self)

I don't like this because if I ever change the name of 'A', I have to go 
through all of the methods and change the names there too.  super() has 
the same problem, but I'm not sure why.  It seems like I should be able 
to do:

class B(A):
    def go(self):
        ...
        super(self).go()

I can create a super() that does this as follows:

_super = super
def super(obj, cls=None):
    if cls is None:
        return _super(type(obj), obj)
    return super(cls, obj)

I guess I'm just not sure why it wasn't done that way in the first place.

-- 
Kevin Smith
Kevin.Smith at sas.com


From tdelaney at avaya.com  Sun Feb  6 18:50:38 2005
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Mon, 7 Feb 2005 10:50:38 +1100
Subject: Alternative to standard C "for"
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE02520313@au3010avexu1.global.avaya.com>

adomas.paltanavicius at gmail.com wrote:

> 2) for i in range(A, B, STEP):
>      ...do something...

Note that the most common use of this is something like:

    t = 1, 2, 3

    for i in range(len(t)):
        print i, t[i]

This is best accomplished as:

    t = 1, 2, 3

    for i, e in enumerate(t):
        print i, e

Tim Delaney


From peter at engcorp.com  Sat Feb 12 22:31:44 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 12 Feb 2005 22:31:44 -0500
Subject: help please
In-Reply-To: <1108255681.026407.315710@f14g2000cwb.googlegroups.com>
References: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
	<1108255681.026407.315710@f14g2000cwb.googlegroups.com>
Message-ID: <gOOdnTRZnaYHV5PfRVn-3w@powergate.ca>

wittempj at hotmail.com wrote:
> add just below the procedure declaration 'global t2'  as you're
> referring to a global variable ...

More specifically, *modifying* it.  Just referring to it
doesn't require a "global" declaration...

-Peter


From fredrik at pythonware.com  Mon Feb 14 13:03:33 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 19:03:33 +0100
Subject: ValueError: invalid literal for int(): 1.0000000000e+00
References: <4210D979.4000709@ribosome.natur.cuni.cz>
	<cuqo51$e2t$1@sea.gmane.org>
Message-ID: <cuqp0k$h80$1@sea.gmane.org>

Terry Reedy wrote:

> int(somestring) without a radix argument requires that somestring be an decimal integer literal 
> and nothing more and nothing else.

but specifying a radix won't help you, though:

>>> int("1.0", 10)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: invalid literal for int(): 1.0
>>> int("1e+10", 10)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: invalid literal for int(): 1e+10
>>> int("1.0000000000e+10", 10)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: invalid literal for int(): 1.0000000000e+10

</F> 





From tundra at tundraware.com  Tue Feb 15 14:28:05 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 15 Feb 2005 14:28:05 EST
Subject: Accessing Objects Based On Their ID
In-Reply-To: <37e5ioF5brmq1U1@individual.net>
References: <uc39e2-63h1.ln1@eskimo.tundraware.com>
	<37e5ioF5brmq1U1@individual.net>
Message-ID: <lru9e2-c7l1.ln1@eskimo.tundraware.com>

Diez B. Roggisch wrote:

>>Given the ID of an object, is there a way to access it?  For example,
>>if we have the ID of a class instance, is there a way to invoke its
>>methods and attributes knowning only that ID?  Similarly, if we have the
>>ID of a function, is there a way to call it?
> 
> 
> No. 
> 
> 
>>This comes up because of an implementation I had in mind wherein I
>>would store the IDs of a notionally linked-list of objects - but without
>>the link - I just want to store their IDs in the desired order.  But
>>later, when I want to actually use the objects I need a way to get from ID
>>back to something accessible in the namespace...
> 
> 
> Why only the id? A list only stores a reference to the object anyway - no
> copy of it. So you don't gain anything by using the id.

Point taken... thanks.

-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From fredrik at pythonware.com  Mon Feb 14 15:21:26 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 21:21:26 +0100
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr><cupupa$kfs$2@usenet.otenet.gr><1108398011.213872.321390@o13g2000cwo.googlegroups.com><cuqqqi$ep1$1@ctb-nnrp2.saix.net><1108407625.250592.104280@c13g2000cwb.googlegroups.com><jN0XedqDmPECFwnz@objmedia.demon.co.uk>
	<1108409476.874751.16600@l41g2000cwc.googlegroups.com>
Message-ID: <cur135$ed6$1@sea.gmane.org>

"Pat" wrote:

> If you are telling me that minGW can compile extensions that are
> compatible with the Python 2.4 that uses msvcr71.dll, then that is good
> news indeed.  Is there anything that needs to be configured or patched
> to make this happen?  And how does minGW know which dll to link?  What
> if I have both versions of Python installed - 2.3.5 and 2.4?  Is there
> an easy way to detect this and switch between the two dlls?

just use the right Python to run the setup.py script, and distutils will take
care of the rest.

</F> 





From removethis.kartic.krishnamurthy at gmail.com  Thu Feb 24 08:09:53 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Thu, 24 Feb 2005 13:09:53 GMT
Subject: Working FTP server based on Twisted framework.
In-Reply-To: <cvhj87$5n0$1@inews.gazeta.pl>
References: <cvhj87$5n0$1@inews.gazeta.pl>
Message-ID: <BmkTd.27510$vK5.25032@twister.nyroc.rr.com>

Mateusz So?tysek said the following on 2/23/2005 4:45 AM:
> Hi call,
> 
> Does anybody know, if there is any opensource, working FTP server 
> implementation based on Twisted framework?
> 
> Greetings

Mateusz,

I don't believe there is a ready-to-go FTP server in Twisted (actually 
google did not return anything obvious for my search string).

If you are looking a simple implementation of FTP server in Twisted, you 
can create an FTP server in seconds in mktap (or the GUI equivalent). 
Both of these are installed when you install the Twisted framework.

For help on mktap, see : 
http://twisted.sourceforge.net/TwistedDocs-1.1.0/man/mktap-man.html
(ftp is explained)

If you have no reason to use Twisted, may be you can take a look at 
http://www.mythi.cx/python/pyFTPdrop.py but this is for UNIXish 
operating systems.

HTH!
-Kartic


From birdfamily at gmail.com  Wed Feb 16 09:37:05 2005
From: birdfamily at gmail.com (Birdman)
Date: 16 Feb 2005 06:37:05 -0800
Subject: Stable GUI
In-Reply-To: <c0e7fd79.0502160619.565eb40e@posting.google.com>
References: <c0e7fd79.0502160619.565eb40e@posting.google.com>
Message-ID: <1108564625.043540.83000@o13g2000cwo.googlegroups.com>

Check out EasyGui. It's easy to use/modify Tinker:

http://www.ferg.org/easygui/

>From the web page:
" Experienced Pythonistas need support for quick and dirty GUI
features. New Python programmers need GUI capabilities that don't
require any knowledge of Tkinter, frames, widgets, callbacks or lambda.
This is what EasyGUI provides. Using EasyGUI, all GUI interactions are
invoked by simple function calls.

" EasyGUI is different from other GUIs in that EasyGUI is NOT
event-driven. It allows you to program in a traditional linear fashion,
and to put up dialogs for simple input and output when you need to. If
you have not yet learned the event-driven paradigm for GUI programming,
EasyGUI will allow you to be productive with very basic tasks
immediately. Later, if you wish to make the transition to an
event-driven GUI paradigm, you can do so with a more powerful GUI
package such as anygui, PythonCard, Tkinter, wxPython, etc."



From timr at probo.com  Thu Feb 17 23:50:42 2005
From: timr at probo.com (Tim Roberts)
Date: Thu, 17 Feb 2005 20:50:42 -0800
Subject: How do I make my program start fullscreen ?
References: <17smpt9l5tn7z.1744dg3zal7hj.dlg@40tude.net>
Message-ID: <60ta11t02f3duhtvdjkde5ps5m72265lq0@4ax.com>

BOOGIEMAN <BOOGIEMANPN at YAHOO.COM> wrote:
>
>os = windows xp 
>How do I make "myprogram.py" start fullscreen at windows command prompt ?
>Also I made it as "myprogram.exe" with py2exe,but how to start fullscreen ?

Which GUI toolkit are you using?  wxPython?  tk?  The answer depends on
that.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From removethis.kartic.krishnamurthy at gmail.com  Thu Feb 24 17:54:52 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Thu, 24 Feb 2005 22:54:52 GMT
Subject: Python Online Programming Contest
In-Reply-To: <1109283053.971905.27670@z14g2000cwz.googlegroups.com>
References: <1109278779.955986.193860@z14g2000cwz.googlegroups.com>
	<1109283053.971905.27670@z14g2000cwz.googlegroups.com>
Message-ID: <0XsTd.38278$H05.9488@twister.nyroc.rr.com>

Will Stuyvesant said the following on 2/24/2005 5:10 PM:
>>[Varun]
>>For details about samhita http://www.samhita.info/
> 
> 
> "The Madras Institute of Technology (MIT)" it says there.
> 
> The MIT acronym is taken already guys..
> 

Will - It is a local acronym!


From jdhunter at ace.bsd.uchicago.edu  Sat Feb 19 21:11:36 2005
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Sat, 19 Feb 2005 20:11:36 -0600
Subject: Matplotlib, py2exe and pytz
In-Reply-To: <1108776896.490620.249130@f14g2000cwb.googlegroups.com> ("scott"'s
	message of "18 Feb 2005 18:02:18 -0800")
References: <1108776896.490620.249130@f14g2000cwb.googlegroups.com>
Message-ID: <m3sm3sdlpj.fsf@peds-pc311.bsd.uchicago.edu>

>>>>> "scott" == scott  <sh_snyder at yahoo.com> writes:

    scott> I am trying to convert a python app that uses matplotlib to
    scott> a standalone executable using py2exe.

    scott> After running py2exe and executing my app I get the
    scott> following stack trace:

    scott> Traceback (most recent call last): File "gcToCsv.py", line
    scott> 5, in ?  File "plot_output.pyc", line 1, in ?  File
    scott> "pylab.pyc", line 1, in ?  File "matplotlib\pylab.pyc",
    scott> line 194, in ?  File "matplotlib\axes.pyc", line 46, in ?
    scott> File "matplotlib\dates.pyc", line 94, in ?  File
    scott> "pytz\__init__.pyc", line 53, in timezone KeyError: 'UTC'

    scott> It appears that the instructions on the matplotlib web site
    scott> and wiki are incomplete and the pytz.zoneinfo package is
    scott> not being included in the finished dist directory.

In your script that you are trying to freeze, do, 

  import pytz
  import dateutil

as a hint to py2exe that you want these modules.  Does this help?

Does the script you are trying to freeze explicitly use matplotlib
date functionality?

JDH


From raghulj at gmail.com  Mon Feb 28 23:59:07 2005
From: raghulj at gmail.com (Raghul)
Date: 28 Feb 2005 20:59:07 -0800
Subject: enter key event in wxpython
Message-ID: <1109653147.082810.151090@o13g2000cwo.googlegroups.com>

hi,
   I am developing a jabber client.What I need is whrn i enter text in
the text area and when I press return key. The following text should be
send.I found the way to send the message, the only thing is I want to
handle the enter key event.how to do this? so that when i press enter
key, The key id or the event to be handled. Help me pls.



From jstroud at mbi.ucla.edu  Thu Feb 17 13:22:01 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 17 Feb 2005 10:22:01 -0800
Subject: Alternative to standard C "for"
In-Reply-To: <1108620618.3892.85.camel@lipscomb.mbi.ucla.edu>
References: <1107628331.816935.16760@o13g2000cwo.googlegroups.com>
	<740c3aec050205104924a82d23@mail.gmail.com>
	<1108620618.3892.85.camel@lipscomb.mbi.ucla.edu>
Message-ID: <1108664521.3892.88.camel@lipscomb.mbi.ucla.edu>

On Sat, 2005-02-05 at 10:49, BJ?rn Lindqvist wrote:
> > I am quite new to Python, and have a straight & simple question.
> > In C, there is for (init; cond; advance). We all know that.
> > In Python there are two ways to loop over i=A..B (numerical.):
> > 1) i = A
> >    while i<B:
> >       ...do something...
> >       i+=STEP
> 
> This is indeed quite ugly. You rarely need such loops in Python and
> with some thinking you can often translate the C-equivalent to
> something more pythonic. As you guessed, your second problem is best
> solved with a generator function - xrange(). It is completely equal to
> range() except that it returns a generator instead of a list.

It seems I need constructs like this all of the time

i = 0
while i < len(somelist):
  if oughta_pop_it(somelist[i]):
    somelist.pop(i)
  else:
    i += 1

There has to be a better way...

Any thoughts?

James

-----------------
7. Obsession with National Security
Fear is used as a motivational tool by the government over the masses.



From eppstein at ics.uci.edu  Sat Feb 19 14:13:13 2005
From: eppstein at ics.uci.edu (David Eppstein)
Date: Sat, 19 Feb 2005 11:13:13 -0800
Subject: exercise: partition a list by equivalence
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<mailman.2803.1108743668.22381.python-list@python.org>
	<1108768870.455974.244590@c13g2000cwb.googlegroups.com>
	<eppstein-8851A4.18394418022005@news.service.uci.edu>
	<1108837453.883740.309270@f14g2000cwb.googlegroups.com>
Message-ID: <eppstein-A683E6.11131319022005@news.service.uci.edu>

In article <1108837453.883740.309270 at f14g2000cwb.googlegroups.com>,
 bearophileHUGS at lycos.com wrote:

> David Eppstein:
> > However it might be easier to treat the input pairs as the edges of a
> > graph and apply a depth-first-search based graph connected components
> > algorithm. || This would be O(n), though.
> 
> Is the DFS the best one here (instead of BFS)?

I'm not sure it makes much difference.

> With the graph implementation that I've just shown here it becomes:
> 
> . import graph
> . def merge(l):
> .     g = graph.Graph()
> .     g.addArcs(l)
> .     return g.connectedComponents()
> . print merge( [ [1,2], [2,4], [5,6] ] )
> 
> I presume the complexity is O(n+a); n (the nodes) is proportional to
> the number of pairs, and
> a (the arcs) depends on the "intricacy" of the input pairs. For a
> complete graph, this can
> become slow (but there is a high probably that all the pairs are in the
> same connected component).

It's still linear in the input size, which is the best you could hope 
for.

-- 
David Eppstein
Computer Science Dept., Univ. of California, Irvine
http://www.ics.uci.edu/~eppstein/


From harlinseritt at yahoo.com  Wed Feb 23 04:31:40 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 23 Feb 2005 01:31:40 -0800
Subject: Creating Button arrays with different commands using Tkinter
In-Reply-To: <mailman.2938.1109088848.22381.python-list@python.org>
References: <1109077464.543960.282830@o13g2000cwo.googlegroups.com>
	<mailman.2938.1109088848.22381.python-list@python.org>
Message-ID: <1109151100.436645.212110@l41g2000cwc.googlegroups.com>

Thanks Frederik. I knew it was not binding the way I intended to, but
just had no idea why or how to make it do so... thanks for the quick
lambda lesson :-)



From ilias at lazaridis.com  Wed Feb 23 09:01:41 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Wed, 23 Feb 2005 16:01:41 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <nmSSd.25321$Am3.782245@news20.bellglobal.com>
References: <cuo71l$gig$1@usenet.otenet.gr> <cvaoft$av6$1@usenet.otenet.gr>
	<874qg6937w.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<cvcv9b$nbm$1@usenet.otenet.gr> <37uk2kF5gv38bU1@individual.net>
	<nmSSd.25321$Am3.782245@news20.bellglobal.com>
Message-ID: <cvi2c5$ibu$1@usenet.otenet.gr>

Markus Wankus wrote:
> George Sakkis wrote:
>> "Ilias Lazaridis" <ilias at lazaridis.com> wrote in message 
[...]
>>> The Essence is this one, as stated before:
>>>
>>> [huge copy paste of previous post]
>>
>> The Essence is irrelevant.
>> -
>> -
>> -
>> All your thread are belong to us.
>> -
>> -
>> -
> 
> For great justice!
> 
> ;o)

[EVALUATION] - E02 - Support for MinGW Open Source Compiler
Essence:
http://groups-beta.google.com/group/comp.lang.python/msg/5ba2a0ba55d4c102

.

-- 
http://lazaridis.com


From invalidemail at aerojockey.com  Wed Feb  9 17:05:52 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 9 Feb 2005 14:05:52 -0800
Subject: A ListComp that maintains its own state
In-Reply-To: <s9zr7jqauup.fsf@salmakis.intevation.de>
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
	<87mzuf9gu8.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<s9zvf93ovp8.fsf@salmakis.intevation.de>
	<pan.2005.02.08.12.47.00.135408@jerf.org>
	<s9z8y5yq1fp.fsf@salmakis.intevation.de>
	<mailman.2215.1107900386.22381.python-list@python.org>
	<s9zr7jqauup.fsf@salmakis.intevation.de>
Message-ID: <1107986752.919387.58670@z14g2000cwz.googlegroups.com>


Bernhard Herzog wrote:
> Michael Spencer <mahs at telcopartners.com> writes:
>
> > So, here's factorial in one line:
> > # state refers to list of state history - it is initialized to [1]
> > # on any iteration, the previous state is in state[-1]
> > # the expression also uses the trick of list.append() => None
> > # to both update the state, and return the last state
> >
> >  >>> [state.append(state[-1] * symbol) or state[-1]
> > ...         for symbol, state in
it.izip(range(1,10),it.repeat([1]))
> > ...             ]
> > [1, 2, 6, 24, 120, 720, 5040, 40320, 362880]
> >  >>>
>
> There's no need for repeat:
>
> >>> [state.append(state[-1] * symbol) or state[-1]
>         for state in [[1]]
>         for symbol in range(1, 10)]
> [1, 2, 6, 24, 120, 720, 5040, 40320, 362880]


Nope, that's just too convenient.  Now I'm going to end up doing this
all the time.


-- 
CARL BANKS



From rkern at ucsd.edu  Thu Feb 10 19:08:06 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Thu, 10 Feb 2005 16:08:06 -0800
Subject: Python-libnjb on macosx
In-Reply-To: <mailman.2336.1108069213.22381.python-list@python.org>
References: <mailman.2336.1108069213.22381.python-list@python.org>
Message-ID: <cugt16$p1t$1@news1.ucsd.edu>

Timothy Grant wrote:
> I was working on some things that use Glenn Strong's excellent libnjb
> wrapper on my Linux box. I have since bought a PowerBook and have been
> trying to get everything working correctly under OS/X.
> 
> This morning I got Python-libnjb to build without errors using the
> following command:
> 
> ld -dynamic -dylib -L/sw/lib -L/sw/lib/python2.3/config njb_c_wrap.o
> -o _njb_c.dylib -lpython2.3 -lnjb -lSystem -framework IOKit -ldylib1.o

Try to write a distutils setup.py script. It should take care of the 
correct linker arguments for you.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From alanmk at hotmail.com  Thu Feb 10 18:01:43 2005
From: alanmk at hotmail.com (Alan Kennedy)
Date: Thu, 10 Feb 2005 23:01:43 +0000
Subject: Python and version control
In-Reply-To: <mailman.2348.1108074749.22381.python-list@python.org>
References: <3A81C87DC164034AA4E2DDFE11D258E33983C0@exchange.hqamor.amorhq.net>	<mailman.2279.1107989113.22381.python-list@python.org>
	<mailman.2348.1108074749.22381.python-list@python.org>
Message-ID: <qFROd.47312$Z14.32918@news.indigo.ie>

[Carl]
>>>>> What is the ultimate version control tool for Python if you are 
>>>>> working in a Windows environment? 

[Peter Hansen]
>>>> I never liked coupling the two together like that.  Instead
>>>> I use tools like TortoiseCVS or (now) TortoiseSVN with a
>>>> Subversion repository.  These things let you access revision
>>>> control features from context (right-button) menus right in
>>>> Windows Explorer, as you browse the file system.

[Robert Brewer]
>>> Seconded.

[Johann C. Rocholl]
>> Thirded.

[Roger]
> Fourth-ed!

I suppose that leaves me a Fifth Column subversionist.

I couldn't work without svn and TortoiseSVN now: superb tools.

-- 
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan


From fernandestb at gmail.com  Thu Feb  3 11:50:45 2005
From: fernandestb at gmail.com (fernandestb at gmail.com)
Date: 3 Feb 2005 08:50:45 -0800
Subject: Sendmail with many attach and recipients
Message-ID: <81b88e49.0502030850.490952c9@posting.google.com>

Here, my code of sendmail 
If Somebody had a doubt please contact me? 
fernandestb at gmail.com

# -*- coding: cp1252 -*-
## Faz o import das bibliotecas necessarias.
import mimetypes
import os.path
import smtplib
import sys

from email.Encoders import encode_base64
from email.MIMEAudio import MIMEAudio
from email.MIMEBase import MIMEBase
from email.MIMEImage import MIMEImage
from email.MIMEMultipart import MIMEMultipart
from email.MIMEText import MIMEText

## Funcao para criar lista baseada nos argumentos
## Isto vai ser utilizado para os destinatarios
## como para os arquivos anexados.
def cria_lista(arg):
    lista=[]
    for elemento in arg.split():
        lista.append(elemento)

    return lista


##Faz o anexo dos arquivos a mensagem
##os parametros ? o caminho completo do arquivo e o nome do arquivo
##para fazer o anexo.
def getAttachment(path, filename):
     ctype, encoding = mimetypes.guess_type(path)
     if ctype is None or encoding is not None:
         ctype = 'application/octet-stream'
     maintype, subtype = ctype.split('/', 1)
     fp = open(path, 'rb')
     if maintype == 'text':
         attach = MIMEText(fp.read(),_subtype=subtype,
_charset="iso-8859-15")
     elif maintype == 'message':
         attach = email.message_from_file(fp)
     elif maintype == 'image':
         attach = MIMEImage(fp.read(),_subtype=subtype)
     elif maintype == 'audio':
         attach = MIMEAudio(fp.read(),_subtype=subtype)
     else:
         print maintype, subtype
         attach = MIMEBase(maintype, subtype)
         attach.set_payload(fp.read())
         encode_base64(attach)
     fp.close
     attach.add_header('Content-Disposition',
'attachment',filename=filename)
     return attach

## Verifica se o primeiro parametro passado para o programa e --h
## chama o help.
if sys.argv[1] == '--h' :
    print 'sendmail <servidor de email> <From> <To> [Assunto]
[Mensagem] [Anexos] [Arquivo de log]\n'
    print '<servidor>: Servidor SMTP de email.\n'
    print '<From>: Quem esta enviando o email. (Ex.: "fx at fx.com.br")
\n '
    print '<To>: lista de destinatarios do email. (Ex.:
"Jose.Salles at sfw.com.br Francisco.Moreira at sfw.com.br") \n'
    print '[Assunto]: Assunto do email \n'
    print '[Mensagem]: Mesangem do corpo do email \n'
    print '[Anexos]: Lista de arquivos anexos
(Ex:"C:\\relatorios\\rel1.pdf C:\\relatorios\\rel2.pdf") \n'
    print '[Arquivo de log] Diret?rio onde ser? gerado o log da
aplica??o ex: "C:\\temp\\sendmail.log"'
    print 'Ex: sendmail "smtp.fx.com.br" "fx at fx.com.br"
"Jose.Salles at sfw.com.br Francisco.Moreira at sfw.com.br" "teste de email"
"isto e apenas um teste" "C:\\temp\\rel2.pdf C:\\temp\\rel1.pdf"
"C:\\temp\\sendmail.log" \n'
    print 'Par?metros entre chaves[] s?o opcionais, os outros
par?metros s?o obrigat?rios'

else:  
    msg = MIMEMultipart()
    ## o 1? parametro e o servidor SMTP.
    servidor_smtp=sys.argv[1]
    ## o 2? parametro e quem esta enviando o anexo.
    msg['From']=sys.argv[2]
    ## o 3? parametro e a lista de destinat?rios.
    toaddrs=cria_lista(sys.argv[3])
    ## o 4? parametro e o assunto da mensagem.
    msg['Subject'] = sys.argv[4]
    ## o 5? parametro e a mensagem do corpo do email.
    mensagem=sys.argv[5]
    ## o 6? parametro cria a lista de arquivos.
    arquivos=cria_lista(sys.argv[6])
    ## o 7? parametro especifica onde ser? gerado o arquivo de log
    dir_log=sys.argv[7]
    ##Verifica se ? vazio o arquivo
    if dir_log == "":
        dir_log="C:\\temp\\sendmail.log"
        
    ## executa um loop na lista de arquivos
    ## e chama a funcao que anexa os arquivos.
    for arq in arquivos:
        path = arq
        filename = os.path.basename(arq)
        attach = getAttachment(path, filename)
        msg.attach(attach)
        
    ## texto do corpo do email que sera anexado.   
    text=MIMEText(mensagem,_charset="iso-8859-15")
    msg.attach(text)

    ## Busca o servidor de SMTP e faz a conexao.
    try:
        server = smtplib.SMTP(servidor_smtp)
        ## Faz o envio do email.
        server.sendmail(msg['From'],toaddrs,msg.as_string())
        ## Fecha a conex?o com o servidor.
        server.quit()

    except  Exception, e:
        arq=open(dir_log,'a')
        print >> arq, "Falha no envio da mensagem de email, n?o foi
possivel a conex?o ao servidor %s" % servidor_smtp
        arq.close


From guettli at thomas-guettler.de  Wed Feb  2 10:35:17 2005
From: guettli at thomas-guettler.de (Thomas Guettler)
Date: Wed, 02 Feb 2005 16:35:17 +0100
Subject: Prepending to traceback
References: <ctqijj$q6t$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <pan.2005.02.02.15.35.16.482697@thomas-guettler.de>

Am Wed, 02 Feb 2005 13:55:24 +0100 schrieb Stefan Behnel:

> Hi!
> 
> I'm writing a parser using pyparsing and I would like to augment the 
> ParserException tracebacks with information about the actual error line *in 
> the parsed text*. Pyparsing provides me with everything I need (parsed line 
> and column), but is there a way to push that information on the traceback?

Hi,

have a look at the source of ParseException. I guess there
is attribute which holds the string. If the attribute is "msg",
you could do it like this:

try:
    ....
except ParseException, e:
    e.msg="Textbefore %s" % e.msg
    raise e

(code is not tested)

 Thomas
 

-- 
Thomas G?ttler, http://www.thomas-guettler.de/




From davidf at sjsoft.com  Tue Feb  1 02:58:24 2005
From: davidf at sjsoft.com (David Fraser)
Date: Tue, 01 Feb 2005 09:58:24 +0200
Subject: Suggesion for an undergrad final year project in Python
In-Reply-To: <1107241918.722156.123590@c13g2000cwb.googlegroups.com>
References: <1107241918.722156.123590@c13g2000cwb.googlegroups.com>
Message-ID: <ctncr0$75q$1@ctb-nnrp2.saix.net>

Sridhar wrote:
> Hi,
> 
> I am doing my undergrade CS course.  I am in the final year, and would
> like to do my project involving Python.  Our instructors require the
> project to have novel ideas.  Can the c.l.p people shed light on this
> topic?
> 
You could write a Python program that writes novels.


From sjmachin at lexicon.net  Mon Feb 28 15:25:04 2005
From: sjmachin at lexicon.net (John Machin)
Date: 28 Feb 2005 12:25:04 -0800
Subject: My C module crashes
In-Reply-To: <mailman.3139.1109606120.22381.python-list@python.org>
References: <mailman.3139.1109606120.22381.python-list@python.org>
Message-ID: <1109622304.781138.282050@l41g2000cwc.googlegroups.com>


Egil Moeller wrote:
> Hi!
>
> I've written a C-module for Python, and it works as intended, but
> obviously does something wrong with its memmory management
(refference
> counting), as it causes Python to segfault now and then (randomly,
> whey :S)
>
> The module source code is available at
> http://grimoire.takeit.se/files/CReader.c
>
> The code isn't _that_ long, so someone experienced with writing
Python C
> modules should probably not have that hard a time finding what I do
> wrong :)

What you are doing wrong:

1. Unless getting the source to/from a web page has stuffed up the
indentation [which you should have checked before posting your
message], it appears to be indented only ONE space per level. Are you
using tabs? Don't. They are intrinsically evil.

2. Your code's over 1200 lines long, and even after allowing for the
indentation problem it certainly doesn't read like the poetry of your
namesake, Skalla-Grim's son.

3. Expecting people to debug your code remotely when it exhibits
problems (1) and (2)

4. Not stating what (if anything) you have tried yourself before
posting.

5. Using system free() and realloc() instead the Python-supplied memory
API functions.

6. Using *ANY* free() or realloc() function on memory that has *NOT*
been allocated with the allocator function from the same family.

7. Not checking whether a buffer has even been allocated before trying
to deallocate it.



From daniel at bowettsolutions.com  Thu Feb 17 06:33:21 2005
From: daniel at bowettsolutions.com (Daniel Bowett)
Date: Thu, 17 Feb 2005 11:33:21 +0000
Subject: MYSQL - how to install ?
In-Reply-To: <1108635996.165520.132960@o13g2000cwo.googlegroups.com>
References: <1108547199.260223.211450@f14g2000cwb.googlegroups.com>	<1108556905.444394.210020@l41g2000cwc.googlegroups.com>	<1108562949.825258.297260@f14g2000cwb.googlegroups.com>	<mailman.2686.1108564423.22381.python-list@python.org>
	<1108635996.165520.132960@o13g2000cwo.googlegroups.com>
Message-ID: <cv1vln$jr5$1@sea.gmane.org>

export at hope.cz wrote:
> Daniel Bowett wrote:
> 
>>Lad wrote:
>>
>>>I am sorry it was my fault I did not say that clearly.
>>> I do not have a problem to install MySQL  server but I do not know
> 
> how
> 
>>>to install MySQLdb module on my windowsXP so that I can work  with
>>>MySQL server via Python 2.3.
>>>Thanks for help
>>>Lad
>>>
>>
>>Try this installer, if you want a newer version you will need to
> 
> compile
> 
>>it yourself.
>>
>>
> 
> http://prdownloads.sourceforge.net/mysql-python/MySQL-python.exe-1.0.0.win32-my4.1-py2.3.exe?download
> 
> Thank you I will try. As far as I understand I can install the latest
> MySQL server and then MySQLdb module on my windowsXP with the
> installer( the link you provided above).
> Is it so?
> Lad.
> 
Thats correct.



From DrColombes at yahoo.com  Tue Feb 22 18:19:02 2005
From: DrColombes at yahoo.com (Dr. Colombes)
Date: 22 Feb 2005 15:19:02 -0800
Subject: MatPlotLib.MatLab troubles (how to install/run
	matplotlib.PyLab?)
In-Reply-To: <mailman.2909.1109038689.22381.python-list@python.org>
References: <1109033814.888677.286240@c13g2000cwb.googlegroups.com>
	<mailman.2909.1109038689.22381.python-list@python.org>
Message-ID: <1109114342.782633.31240@o13g2000cwo.googlegroups.com>


John Hunter wrote:
> >>>>> "Colombes" == Colombes  <DrColombes at yahoo.com> writes:
>
>     Colombes> matplotlib.matlab deprecated, please import
>     Colombes> matplotlib.pylab or simply pylab instead.  See
>     Colombes> http://matplotlib.sf.net/matplotlib_to_pylab.py for a
>     Colombes> script which explains this change and will
automatically
>     Colombes> convert your python scripts that use matplotlib.matlab.
>     Colombes> This change was made because we were concerned about
>     Colombes> trademark infringement on The Mathwork's trademark of
>     Colombes> matlab.
>
>     Colombes> Unfortunately, the above URL does not exist.
>
> Oops -- that should be
> http://matplotlib.sourceforge.net/matlab_to_pylab.py
>
> In a nutshell, wherever you previously imported matplotlib.matlab you
> can import matplotlib.pylab or equivalently, simply pylab
>
> OLD:
> from matplotlib.matlab import plot
>
> NEW:
> from pylab import plot
>
> The script linked above will recursively search and replace these
> strings for you in your scripts directory.
>
> JDH


John:

   Thanks for the help with the MatLab --> PyLab conversion.

   Now I only need to figure out how to install the correct "Numeric"
module(s).  I'm making progress, almost have my home laptop fully
capable with the MatLab-like (PyLab) graphs, plots.



From mike-dekrunjil at mailblocks.com  Mon Feb 21 20:30:25 2005
From: mike-dekrunjil at mailblocks.com (Mike Dee)
Date: Tue, 22 Feb 2005 03:30:25 +0200
Subject: UTF-8 / German,
	Scandinavian letters - is it really this difficult?? Linux &
	Windows XP
Message-ID: <cve1vh$c37$1@phys-news1.kolumbus.fi>


   A very very basic UTF-8 question that's driving me nuts:

If I have this in the beginning of my Python script in Linux:

#!/usr/bin/env python
# -*- coding: UTF-8 -*-

should I - or should I not - be able to use non-ASCII characters 
in strings and in Tk GUI button labels and GUI window titles and in 
raw_input data without Python returning wrong case in manipulated 
strings and/or gibberished characters in Tk GUI title? 



With non-ASCII characters I mean ( ISO-8859-1 ??) stuff like the 
German / Swedish / Finnish / etc "umlauted" letter A  (= a diaresis; 
that is an 'A' with two dots above it, or an O with two dots above.)

In Linux in the Tk(?) GUI of my 'program' I get an uppercase "A" 
with a tilde above - followed by a general currency symbol ['spider']. 
That is, two wrong characters where a small umlauted letter "a" 
should be. 

But in Windows XP exactly the *same* code (The initiating "#!/usr/bin
/env python" and all..) works just fine in the Tk GUI - non-ascii 
characters showing just as they should. (The code in both cases is 
without any u' prefixes in strings.)



I have UTF-8 set as the encoding of my Suse 9.2 / KDE localization, I 
have saved my 'source code' in UTF-8 format and I have tried to read
*a lot* of information about Unicode and I have heard it said many 
times that Python handles unicode very well -- so why can it be so 
bl**dy difficult to get an umlauted (two-dotted) letter a to be 
properly handled by Python 2.3? In Windows I have Python 2.4 - but the 
following case-insanity applies for Windows-Python as well:

For example, if I do this in my Linux konsole (no difference whether it 
be in KDE Konsole window or the non-gui one via CTRL-ALT-F2):

>>>aoumlautxyz="12xyz"       # number 1 = umlauted a, number 2 = uml o 
>>>print aoumlautxyz.(upper)

then the resulting string is NOT all upper case - it is a lowercase 
umlauted a, then a lowercase umlauted o then uppercase XYZ

And command:

>>> print aoumlautxyz.title()

..results in a string where a-umlaut, o-umlaut and yz are lowercase and 
only the Z in the middle is uppercase.  

this >>>print aoumlautxyz.lower()      

.. prints o.k. 


Am I missing something very basic here? Earlier there was a difference in 
my results between running the scripts in the CTRL ALT F2-konsole and the 
KDE-one, but I think running unicode_start & installing an unicode console
font at some point of time ironed that one out.

If this is due to some strange library, could someone please give me a 
push to a spot where to read about fixing it? Or am I just too stupid, 
and that's it. (I bet that really is what it boils down to..)


<rant>

I cannot be the only (non-pro) person in Europe who might need to use non-
ASCII characters in GUI titles / button labels, in strings provided by the 
users of the software with raw_input (like person's name that begins with 
an umlauted letter or includes one or several of them) ..in comments, and 
so on.

How would you go about making a script where a) the user types in any text 
(that might or might not include umlauted characters) and b) that text then 
gets uppercased, lowercased or "titled" and c) printed? 

Isn't it enough to have that 'UTF-8 encoding declaration' in the beginning,
and then just like get the user's raw_input, mangle it about with .title() 
or some such tool, and then just spit it out with a print statement?

One can hardly expect the users to type characters like unicode('\xc3\
xa4\xc3\xb6\xc3\xbc', 'utf-8')u'\xe4\xf6\xfc' u"???".encode('utf-8') or 
whatnot, and encode & decode to and fro till the cows come home just to 
get a letter or two in their name to show up correctly. 

It's a shame that the Linux Cookbook, Learning Python 2nd ed, Absolute 
beginners guide to Python, Running Linux, Linux in a Nutshell, Suse 9.2 
Pro manuals and the online documentation I have bumped into with Google
(like in unicode.org or python.org or even the Python Programming Faq 
1.3.9 / Unicode error) do not contain enough - or simple enough - 
information for a Python/Linux newbie to get 'it'.

For what it's worth, in Kmail my encoding iso ISO8859-1. I tried that 
coding one in my KDE and my Python scripts, earlier too, but it was 
no better; actually that was why I started this Unicode sh..  ..thing. 


Am I beyond hope?

</rant>


Mike     d 




From mad.mick at gmx.de  Wed Feb  2 13:15:23 2005
From: mad.mick at gmx.de (Mick Krippendorf)
Date: Wed, 2 Feb 2005 19:15:23 +0100
Subject: Hash of class from instance
References: <1107363342.531396.238350@g14g2000cwa.googlegroups.com>
	<Xns95F1AE4AFCC36duncanrcpcouk@127.0.0.1>
	<1107364617.371795.13740@l41g2000cwc.googlegroups.com>
Message-ID: <36cj80F4ue5biU1@individual.net>

Joakim Storck wrote:
> [...] the hash values of classes will be used as
> keys in a dictionary that serve as an object pool. [...]

That does seem unwise (as Teal'c would have uttered). The spec says:

----
      hash( object)

Return the hash value of the object (if it has one). Hash values are
integers. They are used to quickly compare dictionary keys during a
dictionary lookup. Numeric values that compare equal have the same hash
value (even if they are of different types, as is the case for 1 and
1.0).
----

Normally the following should hold (not mentioned in the above spec but
true for Java, e.g.): if a and b are objects such that a equals b then
hash(a) equals hash(b). This does not imply that if hash(a) equals
hash(b) also a equals b. More formally: (a == b) -> (hash(a) ==
hash(b)).

In Python there seems to be no guarantee that different objects also
have different hash values. So let's assume we have class objects Foo
and Bar, which by some unlikely incident happen to have the same hash
values, then storing them in a dictonary under their respective hash
values (which are identical) would most probably lead into a problem,
secifically the problem that you'd end up accessing Foo when you indeed
think you are accessing Bar, or vice versa. Just try this:

 >>> my_pseudo_hash_code = 1
 >>> my_dict = {my_pseudo_hash_code:"gnarf",
my_pseudo_hash_code:"snarf"}
 >>> print my_dict

Mick.



From peter at engcorp.com  Wed Feb  9 18:42:58 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 09 Feb 2005 18:42:58 -0500
Subject: A great Alan Kay quote
In-Reply-To: <mailman.2280.1107992388.22381.python-list@python.org>
References: <420a5c1e$0$21630$a1866201@visi.com>	<XL6dnQ1rPechD5ffRVn-uw@powergate.ca>
	<mailman.2280.1107992388.22381.python-list@python.org>
Message-ID: <2qWdnTwel8K4PZffRVn-oA@powergate.ca>

Fran?ois Pinard wrote:
> [Peter Hansen]
> 
> 
>>Then Perl is an "agglutination of styles", while Python might
>>be considered a "crystallization of features"...
> 
> 
> Grosso modo, yes.  Yet, we should recognise that Python agglutinated
> a few crystals in the recent years. :-)
> 
> It gave up some of its purity for practical reasons.  We got rather far
> from the "There is only one way to do it!" that once was Python motto.

I would call a "pure" language one that had a crystallized style.

Python, on the other hand, is just plain practical.  Thus my
half-humorous attempt at defining it in terms of the features
(with its wide-ranging library and extension modules) rather
than in termso of its style (which as you know can range
from procedural to functional, stopping briefly at object
oriented and "newbie" along the way ;-) ).

-Peter


From ajsiegel at optonline.com  Sun Feb  6 07:30:33 2005
From: ajsiegel at optonline.com (Arthur)
Date: Sun, 06 Feb 2005 07:30:33 -0500
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<qb1a01lk3mv4vp852q88prqb9al336h9r2@4ax.com>
	<1grj036.r13xcy1d72inbN%aleaxit@yahoo.com>
	<2qba01d1men2ai48gp4cojo2e28rd5g9ob@4ax.com>
	<1grjzia.1a4qr9q1t3p77bN%aleaxit@yahoo.com>
Message-ID: <pt1c015297m7t64cu2g27dbjbrl2ehacbi@4ax.com>

On Sun, 6 Feb 2005 08:47:31 +0100, aleaxit at yahoo.com (Alex Martelli)
wrote:

>
>Even the various "success stories" we've collected (both on websites,
>and, more impressive to PHBs, into paper booklets O'Reilly has printed)
>play a role.  ``NASA uses it for space missions, so of course we must
>use it to control our hot dog franchises'' -- we DID say we're talking
>about stupid firms, right?

>This is a good development, overall.  Against stupidity, the gods
>themselves contend in vain; Python's entrance into stupid firms broadens
>its potential appeal from less than 10% to around 100% of the market,
>which is good news for sellers of books, tools, training, consultancy
>services, and for Python programmers everywhere -- more demand always
>helps.  *BUT* the price is eternal vigilance...

What if:

There was a well conducted market survey conclusive to the effect that
adding optional strict variable declaration would, in the longer run,
increase Python's market share dramatically.

It just would. 

More books. more jobs, etc.

Why would it?

My sense of how the real world works is that there is going to be one
anti-Python advocate lying in wait for the first bug he can find that
he can say would have been caught if Python had strict variable
declaration, as he always knew it should. 

He wants to be the PHB someday. The current PHB knows that, and since
being sensitive to these kinds of realities is how he got to be the
PHB, he is too smart to open himself up to this kind of risk.

The PHB can pretty safely make the use of the option optional.  As
long as he is a position to jump down the throat of the programmer who
created the bug.   

"The option is there, why the hell didn't you use it".

What is the correct language design decision in light of these
realities?

My answer is, I think, the same as your answer. In fact, its simpler
for me - I don't write Python books.

But isn't this kind of where Python is at the moment?

Art 




From gurpreet.sachdeva at gmail.com  Sat Feb 26 04:14:34 2005
From: gurpreet.sachdeva at gmail.com (Gurpreet Sachdeva)
Date: Sat, 26 Feb 2005 14:44:34 +0530
Subject: Error in pywordnet
Message-ID: <a3cc95f00502260114694d24be@mail.gmail.com>

I am using pywordnet and when ever I import the package
from wordnet import *, I get an error:

"Exception exceptions.AttributeError: "DbfilenameShelf instance has no
attribute 'writeback'" in  ignored"

Now the package works fine until I tried to use that in Apache via
CGI. Apache is showing a Server Error and the error_logs states that:

[Fri Feb 25 16:06:08 2005] [error] [client 192.168.1.125]     from
wordnet import *, referer: http://garry/cgi-bin/test.py
[Fri Feb 25 16:06:08 2005] [error] [client 192.168.1.125] ImportError:
No module named wordnet, referer: http://garry/cgi-bin/test.py

While googling, I found:
"It is a simple fix that adds the writeback argument to shelve.open calls."

Source:
http://www-128.ibm.com/developerworks/forums/dw_thread.jsp?forum=185&thread=72747&cat=11

Do anyone have any idea about that? Is there any fix or workaround?

Thanks and Regards,
Garry

http://garrythegambler.blogspot.com/


From fuzzyman at gmail.com  Tue Feb 22 09:17:26 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 22 Feb 2005 06:17:26 -0800
Subject: UTF-8 / German,
	Scandinavian letters - is it really this difficult?? Linux &
	Windows XP
In-Reply-To: <421b385e$0$230$edfadb0f@dread12.news.tele.dk>
References: <cve1vh$c37$1@phys-news1.kolumbus.fi>
	<1109078512.094288.316030@z14g2000cwz.googlegroups.com>
	<421b385e$0$230$edfadb0f@dread12.news.tele.dk>
Message-ID: <1109081846.102735.167730@z14g2000cwz.googlegroups.com>


Max M wrote:
> Fuzzyman wrote:
> > Mike Dee wrote:
>
> >>#!/usr/bin/env python
> >># -*- coding: UTF-8 -*-
>
> > This will mean string literals in your source code will be encoded
as
> > UTF8 - if you handle them with normal string operations you might
get
> > funny results.
>
> It means that you don't have to explicitely set the encoding on
strings.
>
> If your coding isn't set you must write:
>
> ust = '???'.decode('utf-8')
>

Which is now deprecated isn't it ? (including encoded string literals
in source without declaring an encoiding).

> If it is set, you can just write:
>
> ust = u'???'
>
> And this string will automatically be utf-8 encoded:
>
> st = '???'
>
> So you should be able to convert it to unicode without giving an
encoding:
>
> ust = unicode(st)
>

So all your non unicode string literals will be utf-8 encoded. Normal
string operations will handle them with the default encoding, which is
likely to be something else. A likely source of confusion, unless you
handle everything as unicode.

But then I suppose if you have any non-ascii characters in your source
code you *must* be explicit about what encoding they are in, or you are
asking for trouble.

Regards,


Fuzzy
http://www.voidspace.org.uk/python/index.shtml

> --
>
> hilsen/regards Max M, Denmark
> 
> http://www.mxm.dk/
> IT's Mad Science



From steve at holdenweb.com  Thu Feb  3 20:31:02 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 03 Feb 2005 20:31:02 -0500
Subject: [Fwd: [gnu.org #220719] Re: python and gpl]
Message-ID: <4202D056.2040108@holdenweb.com>

In the absence of other information I Cc'd gnu at gnu.org to ask their 
opinion about the relationship between GPL'd Python modules and programs 
that imported them

-------- Original Message --------

> [steve at holdenweb.com - Mon Jan 31 15:49:28 2005]:
> 
> Scott Robinson wrote:
> 
> > On 30 Jan 2005 21:59:25 -0800, Paul Rubin
> > <http://phr.cx at NOSPAM.invalid> wrote:
> > 
> > 
> >>John Hunter <jdhunter at ace.bsd.uchicago.edu> writes:
> >>
> >>>The question is: does shipping a backend which imports a module that
> >>>links with GPL code make some or all of the library GPL.
> >>
> >>Literally speaking, no, not automatically, any more than driving a car
> >>makes you into a licensed driver if you weren't one already.  But if
> >>you weren't licensed, then you've broken the law by driving the car.
> >>So your question should be: 1) is shipping that backend one of the
> >>things you need the GPL to license you to legally do, and 2) if so,
> >>does the GPL in fact give you that license?
> >>
> >>If you're asking in terms of legal enforcement, the answer is 1) maybe
> >>and 2) almost certainly not.  I think it's better to ask in terms of
> >>the GPL's spirit.  I would say that it's not in the GPL's spirit and
> >>that GPL die-hards would consider that use objectionable, though they
> >>might make exceptions for specific cases (so it doesn't hurt to ask).
> >>Some authors who use the GPL are less strict about how they interpret
> >>it, so again, the friendly thing to do is ask the author.
> >>
> >> * If a backend module somebackend does
> >>
> >>    import somelib
> >>
> >>   where somelib is a python wrapper of GPL code, is somebackend GPLd?
> >>
> >>It's GPL'd if you GPL it.  If you don't GPL it, then distributing it
> >>it may be a GPL violation that could get you taken to court.  I
> >>believe the FSF's view is that it is fact a violation; however, the
> >>courts have not yet established this.  The law doesn't have a
> >>black-and-white boundary.  It's more like a fractal.  The only way to
> >>find out what a court will decide is to actually try a case there.
> >>
> >>Rather than try to probe how closely you can dance around the
> >>boundaries of the GPL, you might just ask the author of the GPL'd
> >>library whether what you want to do is ok with him or her.  If s/he
> >>says no and you do it anyway, you're both inviting trouble over the
> >>possible infringement, and also inviting people to try to use your
> >>code in ways you don't like.  Since the free software movement depends
> >>on a spirit of cooperation, I think it's best to avoid trying to press
> >>too hard against the boundaries of anyone's licenses.
> >>
> >>http://www.gnu.org/licenses/gpl-faq.html
> > 
> > 
> > If you read the GPL, it claims everything it can (any "work" created
> > using GPLed "work").  My guess is that anything that calls the code in
> > a way not specifically allowed by the author is going to get you into
> > trouble.  IANAL, but from what I can remember about earlier licensing
> > issues, any code specific for a GPLed library (especially "import")
> > will get you into to trouble.  Having a non-free library with an
> > identical API and issuing 
> > 	exec("import "+sys.argv[1])
> > where the user can supply sys.argv as the name of the gpl'ed library
> > will work (I think there is a free/non-free library out there that is
> > never run, but exists for exactly this condition).
> > 
> > Scott Robinson
> > 
> I presume the appropriate way to answer this question is to ask the Gnu, 
> since under these circumstances the Python zen would advise "refuse the 
> temptation to guess". So I am Cc'ing gnu at gnu.org with a request for an 
> answer to the (apparently relatively simple) question:
> 
> If a Python program imports a module licensed under the GPL, in your 
> opinion does the Python program become a derivative work of the GPL'd 
> software?

Generally, yes.

-- 
-Dave "Novalis" Turner
GPL Compliance Engineer
Free Software Foundation

So, there we have it, not a legal opinion but at least what a GPL 
compliance engineer thinks. I must add, I can't remember when I saw a 
dafter title.

regards
  Steve
-- 
Steve Holden               http://www.holdenweb.com/
Holden Web LLC      +1 703 861 4237  +1 800 494 3119
Python Web Programming  http://pydish.holdenweb.com/



From timh at zute.net  Sat Feb  5 05:12:11 2005
From: timh at zute.net (Tim Hoffman)
Date: Sat, 05 Feb 2005 18:12:11 +0800
Subject: FW: executing VBScript from Python and vice versa
In-Reply-To: <mailman.1921.1107551340.22381.python-list@python.org>
References: <mailman.1921.1107551340.22381.python-list@python.org>
Message-ID: <42049bfc$1@news.highway1.com.au>

PythonWin 2.3.4 (#53, May 25 2004, 21:17:02) [MSC v.1200 32 bit (Intel)] 
on win32.
Portions Copyright 1994-2004 Mark Hammond (mhammond at skippinet.com.au) - 
see 'Help/About PythonWin' for further copyright information.
 >>> from win32com.client import Dispatch
 >>> x = Dispatch("MSScriptControl.ScriptControl")
 >>> x.Language='VBScript'
 >>> x.AddCode("""Function HelloWorld
... HelloWorld = "hello world"
... End Function
... """)
 >>>
 >>> x.Eval("HelloWorld")
u'hello world'
 >>>

Valentina Boycheva wrote:
> Thanks for the reply. I already have "Learning Python" from Mark Lutz and
> David Ascher, which covers 2.3 (I am in 2.4). However, it seems like heavy
> artillery to me. What I want is, for instance, run a VBScript to get a
> function output and feed it to the Python script that called it. The reason
> is that because I feel more comfortable with VBScript and have written a
> small library of useful utilities, I don't want it to become obsolete. In
> the mean time I did more reading and found a couple of prospective
> alternatives - popen and os.system(command). Still need to work out how to
> use them...
> 
> -----Original Message-----
> From: aurora [mailto:aurora00 at gmail.com] 
> Sent: Friday, February 04, 2005 3:28 PM
> To: python-list at python.org
> Subject: Re: executing VBScript from Python and vice versa
> 
> Go to the bookstore and get a copy of Python Programming on Win32
> by Mark Hammond, Andy Robinson today.
> 
>    http://www.oreilly.com/catalog/pythonwin32/
> 
> It has everything you need.
> 
> 
>>Is there a way to make programs written in these two languages  
>>communicate
>>with each other? I am pretty sure that VBScript can access a Python  
>>script
>>because Python is COM compliant. On the other hand, Python might be able  
>>to
>>call a VBScript through WSH. Can somebody provide a simple example? I  
>>have
>>exactly 4 days of experience in Python (and fortunately, much more in  
>>VB6)
>>
>>Thanks.
>>
> 
> 
> 


From steven.bethard at gmail.com  Fri Feb 11 15:17:55 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 11 Feb 2005 13:17:55 -0700
Subject: check if object is number
In-Reply-To: <374ho0F560ughU1@individual.net>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
	<374ho0F560ughU1@individual.net>
Message-ID: <66WdnbJbuf5yj5DfRVn-iA@comcast.com>

George Sakkis wrote:
> "Steven Bethard" <steven.bethard at gmail.com> wrote in message
> news:gcidnb9g_ojxnpDfRVn-tA at comcast.com...
> 
>>Is there a good way to determine if an object is a numeric type?
> 
> In your example, what does your application consider to be numeric?

Well, here's the basic code:

def f(max=None):
     ...
     while max is None or n <= max:
         ...
         # complicated incrementing of n

So for 'max', technically all I need is <= support.  However, the code 
also depends on the fact that after incrementing 'n' enough, it will 
eventually exceed 'max'.  Currently, ints, longs, floats, and Decimals 
will all meet this behavior.  But I'd rather not specify only those 4 
(e.g. with a typecheck), since someone could relatively easily create 
their own new numeric type with the same behavior.  Do you know a better 
way to test for this kind of behavior?

Steve


From davidf at sjsoft.com  Mon Feb 14 13:40:00 2005
From: davidf at sjsoft.com (David Fraser)
Date: Mon, 14 Feb 2005 20:40:00 +0200
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <1108398011.213872.321390@o13g2000cwo.googlegroups.com>
References: <cuo71l$gig$1@usenet.otenet.gr><cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr>
	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>
Message-ID: <cuqqqi$ep1$1@ctb-nnrp2.saix.net>

Pat wrote:
> Wow!  I must say, I'm less than impressed with the responses so far.  I
> know Ilias can give the impression that he is just trolling, but I can
> assure you he is not.  At least, not in this case.  ;-)
> 
> So in an effort to make some headway, I'm going to try to summarize the
> current state of affairs.  The bottom line is that compiling C
> extension modules on the Windows platform for Python 2.4 is, today, a
> royal pain in the ass.  Period.  Here's why.
> 
> The main challenge is that extensions must be compiled using the same
> runtime dll as that used by the Python interpreter itself.

Actually compiling extensions with mingw seems to work fine. Have you 
tried it?

David


From swaroop at swaroopch.info  Tue Feb 22 03:13:58 2005
From: swaroop at swaroopch.info (Swaroop C H)
Date: Tue, 22 Feb 2005 13:43:58 +0530
Subject: Execute a list
In-Reply-To: <a54d2e2305022200123efce04f@mail.gmail.com>
References: <a54d2e2305022200123efce04f@mail.gmail.com>
Message-ID: <421AE9C6.7070908@swaroopch.info>

Groleo Marius wrote:
> How can i execute a string in python?
> How can I execute the code that "s" keeps inside, considering that the
> code is correct?

Use the exec statement : `exec s`
Details at http://www.python.org/doc/ref/exec.html

Regards,
-- 
Swaroop C H
Blog: http://www.swaroopch.info
Book: http://www.byteofpython.info



From xah at xahlee.org  Sat Feb 19 20:26:51 2005
From: xah at xahlee.org (Xah Lee)
Date: 19 Feb 2005 17:26:51 -0800
Subject: exercise: partition a list by equivalence
In-Reply-To: <1108856859.576211.178480@l41g2000cwc.googlegroups.com>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<1108814276.680736.264380@l41g2000cwc.googlegroups.com>
	<37pb5jF5fnfivU1@individual.net>
	<1108856859.576211.178480@l41g2000cwc.googlegroups.com>
Message-ID: <1108862810.984641.234950@f14g2000cwb.googlegroups.com>

an interesting problem so developed now is to write a function that
generate test cases for the purpose of testing performance. (just for
fun)

the design of this function could be interesting. We want to be able to
give parameters in this function so as to spit out all possible screw
test cases. First of all, a range of n (some millions) numbers. Then, a
fraction that specifies the percentage of these number are equivalent.
1 being all equivalent. 0 being all "distinct" (having only one
equivalent member (since the input comes in pairs)). Then we want to
have a parameter that says something like the sizes of the equivalence
groups. Suppose 50% of number are equal among themselves (i.e. have
more than one equivalent member). 1 would be all in one group. 0 would
mean all partitions have size 3 or 2. (there are more to it here...
since this is a distribution) ... Then, we need to turn this range of
integers into pairs. That's something more to think about.

So with this function at hand, we'll be able to say for sure which code
performs better (and under what type of input)

the Order notion in computing mathematics is fairly useless for finer
details.

PS it is not trivial to design this pair generating function. I don't
know if the above is on the right track, but essentially we want to
categorize the type of inputs according to the mathematical operational
performance aspect of partition by equivalence, and distill them into
parameters.

another func to write is one that canonicalize the output. Such as
sorting. So that all results can be compared simply by = in Python.

failing to design a elaborate pair_gen, we can just have pairs of
random numbers. But exactly what nature is such input... is more to
think about.

(in my original application, each number represent a computer file,
there are up to tens of thousands of files, and much less than 0.1% is
same as another, and for files that are same, each equivalent group
number no more than 10 or so.)

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html


John Machin wrote:
> FWIW, here's a brief UAT report:
> 
> Appears to work: Reinhold, David, Xah...
> Has bug(s): ...



From aleaxit at yahoo.com  Sat Feb  5 05:07:11 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 5 Feb 2005 11:07:11 +0100
Subject: empty classes as c structs?
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
Message-ID: <1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>

Nick Coghlan <ncoghlan at iinet.net.au> wrote:
   ...
> Michael Spencer also posted an interesting idea recently about setting up
> a view of an existing dictionary, rather than as a separate object:
> 
> class attr_view(object):
>    def __init__(self, data):
>      object.__setattr__(self, "_data", data)
>    def __getattr__(self, attrname):
>      return self._data[attrname]
>    def __setattr__(self, attrname, value):
>      self._data[attrname] = value

Wasted indirection, IMHO.  A better implementation:

class attr_view(object):
    def __init__(self, data):
        self.__dict__ = data


Alex


From as006d4848 at blueyonder.co.uk  Sun Feb  6 06:36:00 2005
From: as006d4848 at blueyonder.co.uk (Philip Smith)
Date: Sun, 06 Feb 2005 11:36:00 GMT
Subject: Multiple constructors
References: <6SjNd.38337$K7.21639@fe2.news.blueyonder.co.uk>
Message-ID: <AinNd.38406$K7.14757@fe2.news.blueyonder.co.uk>

Thanks to all of you

Some useful ideas in there, even if some of them stretch my current 
knowledge of the language.

C++ to Python is a steep 'unlearning' curve...

Phil

"Philip Smith" <as006d4848 at blueyonder.co.uk> wrote in message 
news:6SjNd.38337$K7.21639 at fe2.news.blueyonder.co.uk...
> Call this a C++ programmers hang-up if you like.
>
> I don't seem to be able to define multiple versions of __init__ in my 
> matrix class (ie to initialise either from a list of values or from 2 
> dimensions (rows/columns)).
>
> Even if Python couldn't resolve the __init__ to use on the basis of 
> argument types surely it could do so on the basis of argument numbers???
>
> At any rate - any suggestions how I code this????
>
> Thanks
>
> Phil
> 




From steven.bethard at gmail.com  Sun Feb 20 20:21:47 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 20 Feb 2005 18:21:47 -0700
Subject: Bug in email package?
In-Reply-To: <KKOdnSNVU7_HroTfRVn-3w@speakeasy.net>
References: <mailman.2876.1108934604.22381.python-list@python.org>
	<KKOdnSNVU7_HroTfRVn-3w@speakeasy.net>
Message-ID: <EtKdnQe9w542qoTfRVn-pw@comcast.com>

Erik Max Francis wrote:
> Roman Suzi wrote:
> 
>> I think that if any object (from standard library at least) doesn't 
>> support
>> iteration, it should clearly state so.
>>
>> My guess is that 'for' causes the use of 'm[0]', which is (rightfully) 
>> an error...
>>
>> Can this behaviour of email be considered a bug?
>> Is there a good case to iterate over something useful in a message
> 
> Why would it be a bug if the documentation never stated that the object 
> was iterable?

I think the bug is not that an error is produced, but that the _wrong_ 
error is produced.  Trying to iterate over something that is not 
iterable should produce a TypeError saying so (not an Attribute error):

py> class C(object):
... 	pass
...
py> iter(C())
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
TypeError: iteration over non-sequence

I've actually seen something like this come up before (I think with 
email.Message even...)  I say call it a bug and submit a patch.  It's 
pretty easy to fix -- just add an __iter__ method to Message that raises 
a TypeError.  That makes it clear that Message doesn't intend to support 
the getitem protocol -- it just does so accidentally because it provides 
__getitem__.

STeVe


From kartic.krishnamurthy at gmail.com  Wed Feb 16 16:44:25 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 16 Feb 2005 13:44:25 -0800
Subject: problem with tutor mailing
In-Reply-To: <614c778e.0502161311.619e98bf@posting.google.com>
References: <614c778e.0502161311.619e98bf@posting.google.com>
Message-ID: <1108590265.138068.227580@g14g2000cwa.googlegroups.com>

> but, i frequently get mails which aren't related with my question.

You mean spam?! This is not the first time you are using email, is it?

> how should i stop it?

Well, it depends. If you are on *nix machine, you can install
Spamassassin locally for your id and filter emails out.

If you are on a Windows machine and use outlook, you can install
Spambayes for Outlook. See http://starship.python.net/crew/mhammond/
for more info.

If you are using OE, I would recommend installing Thunderbird and using
the built-in junk mail controls. It is pretty cool and works well.

I am sure you will get a lot of other ideas from the other fine people
on this list.

HTH!
-Kartic



From steven.bethard at gmail.com  Tue Feb 15 17:21:52 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 15 Feb 2005 15:21:52 -0700
Subject: Newbie question about class operator overloading
In-Reply-To: <mailman.2637.1108489440.22381.python-list@python.org>
References: <mailman.2637.1108489440.22381.python-list@python.org>
Message-ID: <o_udndekQvmR64_fRVn-tg@comcast.com>

Rory Campbell-Lange wrote:
> Hi. I'm just starting to use python.
> 
> I am anxious about how best to set and access items one level down in a
> data structure if I am using __setitem__ and __getitem__.
> 
> At the moment I can do
> 
> for a data structure Data:
> 
>     object.Data = { 'one' : [1, 2, {}, 4],
>                     'two' : [5, 6, {}, 8]}

What is the goal of this data structure?  I have a feeling this needs to 
be refactored...

> However, if I wish to access object.Data['one'][0] for instance, I am
> using the following:
> 
> object['three'] = [0, 'val0'] # set
> x =  object['three'][0]       # get

Seems like you'd do much better with names for the items rather than an 
index.  Maybe something like:

py> class Record(object):
...     def __init__(self, foo, bar, dict, baz):
...         self.foo = foo
...         self.bar = bar
...         self.dict = dict
...         self.baz = baz
...     def __repr__(self):
...         return 'Record(%r, %r, %r, %r)' % ( 

...             self.foo, self.bar, self.dict, self.baz)
...
py> data = dict(one=Record(1, 2, {}, 4),
...             two=Record(5, 6, {}, 8))
py> data
{'two': Record(5, 6, {}, 8), 'one': Record(1, 2, {}, 4)}
py> data['one'].foo = 'val0'
py> data
{'two': Record(5, 6, {}, 8), 'one': Record('val0', 2, {}, 4)}
py> data['one'].foo
'val0'

> Is this advisable? I'm worried the syntax is very odd.

Yes it is odd.  If you want to be more consistent with other Python 
syntax, but you don't want to use a Record, check for keys as tuples:

py> class C(object):
...     def __init__(self):
...         self.data = {}
...     def __setitem__(self, x, value):
...         try:
...             name, index = x
...             self.data.setdefault(name, {})[index] = value
...         except ValueError:
...             self.data[x] = value
...     def __getitem__(self, x):
...         try:
...             name, index = x
...             return self.data[name][index]
...         except ValueError:
...             return self.data[x]
...
py> c = C()
py> c.data
{}
py> c['one', 0] = 1
py> c['one', 3] = 4
py> c['two', 1] = 6
py> c['two', 2] = {}
py> c.data
{'two': {1: 6, 2: {}}, 'one': {0: 1, 3: 4}}
py>

As you can see, Python has builin syntax support to allow tuples to be 
used as dict keys.  (The parentheses can be omitted.)

Still, I think the class-based solution is much better than the 
__getitem__/__setitem__ one.

STeVe


From http  Mon Feb 21 16:14:00 2005
From: http (Paul Rubin)
Date: 21 Feb 2005 13:14:00 -0800
Subject: iterative lambda construction
References: <1109018810.652908.93840@f14g2000cwb.googlegroups.com>
Message-ID: <7xy8dhd3af.fsf@ruckus.brouhaha.com>

"markscottwright" <markscottwright at gmail.com> writes:
> But when I try to do it iteratively, it just hangs when I try to
> evaluate the results (for count > 1):
> 
> def repeated2(f, count):
>     newfun = f
>     for i in range(count-1):
>         newfun = lambda x: newfun(f(x))
>     return newfun
> 
> For the life of me, I can't figure out why.  It seems like for count =
> 2, for example, the results from repeated2 should be lambda x: f(f(x)),
> but it doesn't seem to be.

It's Python's scoping madness.  Try:

  def repeated2(f, count):
     newfun = lambda x: x   # identity
     for i in range(count):
         newfun = lambda x, g=newfun: g(f(x))
     return newfun


From kartic.krishnamurthy at gmail.com  Mon Feb  7 17:27:50 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 7 Feb 2005 14:27:50 -0800
Subject: Big development in the GUI realm
In-Reply-To: <s5RNd.104904$Jk5.38565@lakeread01>
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<s5RNd.104904$Jk5.38565@lakeread01>
Message-ID: <1107815270.149109.80420@c13g2000cwb.googlegroups.com>

Is there a "GPL for Dummies" out there??? :-)

Sorry if I am asking a question that has already been asked/answered in
another form.

In any case, let's say I use Python to create an application that uses
some module that is GPL. So what are my options?
1. Distribute my app as closed source but with source, available upon
request and clearly stated so in my license, for the GPL'ed module. But
the code to my app only is not available as it is closed source.
2. Distribute my app with the source code available upon request, along
with the code of any other GPL'ed modules that my app uses.

I don't know if any other option is possible. Do my stated options
cover the possibilities and if so, which of these are the correct legal
one that I would follow?

Thanks,
-Kartic



From dodysw at gmail.com  Tue Feb  8 00:01:02 2005
From: dodysw at gmail.com (dody suria wijaya)
Date: Tue, 8 Feb 2005 12:01:02 +0700
Subject: Get importer module from imported module
In-Reply-To: <Xns95F67CB7E70AEduncanrcpcouk@127.0.0.1>
References: <mailman.2058.1107773305.22381.python-list@python.org>
	<Xns95F67153AE259duncanrcpcouk@127.0.0.1>
	<mailman.2062.1107776648.22381.python-list@python.org>
	<Xns95F67CB7E70AEduncanrcpcouk@127.0.0.1>
Message-ID: <222875600.20050208120102@asp.co.id>

Yup, Got it.

New problem though. On line:

newclass = new.classobj(classname + '_' + food, (mixin, main), {})

received "TypeError: metaclass conflict: the metaclass of a
derived class must be a (non-strict) subclass of the
metaclasses of all its bases". This had not happened when
was written using 'normal' style like:

class (SaltyMixIn, Main): pass

-- 
  dody suria wijaya
  YahooMsgr ID: dody

Monday, February 7, 2005, 7:20:14 PM, you wrote:

DB> dody suria wijaya wrote:

>> "import a" inside b would not solve the problem, since there
>> are many "module a" and module b does not know beforehand
>> which module had imported it.

DB> Ok, I understand now what you are trying to
DB> achieve, but there isn't any 
DB> concept relating a module back to the first module which tried to import
DB> it. Instead you'll have to specify the relationship yourself.

DB> How about this:

>> #Module c
DB> import sys
DB> food_no = sys.argv[1]
DB> m = __import__(food_no)
DB> goodie = b.Salty(m)

>> #Module b
DB> ...
DB> def Salty(module):
DB>     class Food(SaltyMixIn,module.Main): pass
DB>     return Food()
DB> ...

DB> In fact, it looks like the importing isn't really
DB> something module c should 
DB> be concerned about. I haven't tested the following code (so it will have
DB> bugs), but it should give you some ideas. It remembers classes it has
DB> created so as not to duplicate them, and it also gives each class a
DB> sensible name.

>> #Module c
DB> import sys
DB> food_no = sys.argv[1]
DB> goodie = b.Salty(food_no)

>> #Module b
DB> ...
DB> import new
DB> Classes = {}

DB> def makeFood(classname, food, mixin):
DB>     m = __import__(food)
DB>     main = m.Main
DB>     if (mixin, main) in Classes:
DB>       return Classes[mixin, main]()

DB>     newclass = new.classobj(classname + '_' + food, (mixin, main), {})
DB>     Classes[mixin, main] = newclass
DB>     return newclass
    

DB> def Salty(food):
DB>     return makeFood('Salty', food, SaltyMixIn)
DB> ...




From fredrik at pythonware.com  Mon Feb 14 08:15:59 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 14:15:59 +0100
Subject: [newbie] Confused with raise w/o args
References: <mailman.2523.1108381045.22381.python-list@python.org>
	<421128EC.5080108@freemail.gr>
Message-ID: <cuq863$gf2$1@sea.gmane.org>

"jfj" <jfj at freemail.gr> wrote:

> Wait! second that. We would like to

hmm.  are you seconding yourself, and refering to you and yourself as we?

> here is another confusing case:
>
> ###################
> import sys
>
> class A:
>  pass
>
> class B:
>  pass
>
> def foo ():
>     try:
> raise B
>     except:
> pass
>     raise
>
> def b1():
>  try:
>    raise A
>  except:
>    foo()
>
> try:
>     b1 ()
> except:
>     print sys.exc_info()[0]
> ##################
>
> This reports that __main__.B is raised but wouldn't it be better
> to raise an 'A' since this is the currently handled exception?

no.  your foo() function raises B, and is called from the exception
handler in b1.  exception handlers are free to raise new exceptions
at any time.

maybe you should take a deep breath, and try to figure out exactly
what's confusing to you before posting more examples.

(btw, using traceback.print_exc() instead of print sys.exc_info may
give you more clues about what's really going on.)

</F> 





From apardon at forel.vub.ac.be  Wed Feb  9 03:14:01 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 9 Feb 2005 08:14:01 GMT
Subject: Confused with methods
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>
	<slrnd0enor.26q.apardon@rcpc42.vub.ac.be>
	<1grmd4z.1tlm4e61650vedN%aleaxit@yahoo.com>
	<slrnd0f07t.26q.apardon@rcpc42.vub.ac.be>
	<1grmg8s.17t7tj4180jdj6N%aleaxit@yahoo.com>
	<slrnd0gsel.26q.apardon@rcpc42.vub.ac.be>
	<cubdtf$cue$04$1@news.t-online.com>
Message-ID: <slrnd0jhi9.26q.apardon@rcpc42.vub.ac.be>

Op 2005-02-08, Diez B. Roggisch schreef <deetsNOSPAM at web.de>:
>> No python is not consistent and your continuous repetion doesn't
>> make it so. To illustrate, here the following code:
>> 
>> class A:
>>   l = []
>>   def f(): pass
>> 
>> a = A()
>> print a.l is A.l
>> print a.f is A.f
>> 
>> which produces:
>> 
>> True
>> False
>
> Thats only inconsistent from your POV because you refuse to accept that the
> scope of a function definition does matter.

It doesn't. As Alex has already explained, the above is equivallent to:

def h(): pass

class A:
  l = []
  f = h

a = A()
print a.l is A.l
print a.f is A.f


And such great error would surely brand you a Troll in his eyes.
Scope of definition has nothing to do with it. The only factor
that matters in this case is if the function is a class atribute
or not.

> And as usual its a topic of
> totally unrelevant practical impact and an expression of your strangely
> deeprooted desire to nitpick at such unrelevant details. 

If I told you that this detail, well not this particular one but
one that is close to it, will break one of my applications in
the transition from python 2.3 to 2.4, do you still think
it is irrelevant?

I would also argue that if a particular detail is a stumbling block
for someone to understand something it is not that irrelevant
and that claiming something is inconsistent while it is not,
is not a good way to remove such a stumbling block.


> Why don't you pick something that really bothers people and see if your
> skills (that I'm sure exist) can be of use there?

This did bother someone, it was a stumbling block for him understanding
what was going on.

-- 
Antoon Pardon


From francis.girard at free.fr  Mon Feb 14 16:19:17 2005
From: francis.girard at free.fr (Francis Girard)
Date: Mon, 14 Feb 2005 22:19:17 +0100
Subject: Newbie help
In-Reply-To: <Le8Qd.605$3b7.602@bignews3.bellsouth.net>
References: <lvUPd.10137$pE1.923@bignews3.bellsouth.net>
	<mailman.2568.1108413446.22381.python-list@python.org>
	<Le8Qd.605$3b7.602@bignews3.bellsouth.net>
Message-ID: <200502142219.17566.francis.girard@free.fr>

Sorry.
You have my cheers.

I'm suggesting you to use the python debugger through some GUI ("Eric3" 
http://www.die-offenbachs.de/detlev/eric3.html for example is a nice and easy 
to use GUI). It will greatly help you appreciate Python control flow in 
execution and you will learn a lot more trying to find your bugs that way. It 
sometimes help to suffer a little. But, of course, I think you will always 
find an helping hand if needed.

Regards

Francis Girard

Le lundi 14 F??vrier 2005 21:58, Chad Everett a ??crit??:
> Nope,  I am trying to learn it on my own.  I am using the book by Michael
> Dawson.
>
> Thanks,
> "Francis Girard" <francis.girard at free.fr> wrote in message
> news:mailman.2568.1108413446.22381.python-list at python.org...
> Mmm. This very much look like a homework from school. Right ?
> Francis Girard
>
> Le lundi 14 F?vrier 2005 04:03, Chad Everett a ?crit :
> > Hey guys,
> >
> > Hope you can help me again with another problem.  I am trying to learn
> > Python on my own and need some help with the following.
> >
> > I am writing a program that lets has the pc pick a number and the user
> > has five guess to get the number.
> > 1. BUG:  If the number is say 35 and I guess 41 the program tells me
> > that I guessed the correct number and tells me I guessed 31.
> >
> > 2.When I do get the correct number I can not get the program to stop
> > asking me for the number.
> >
> >
> > Your help is greatly appreciated.
> >
> > Chad
> >
> > # Five Tries to Guess My Number
> > #
> > # The computer picks a random number between 1 and 100
> > # The player gets Five tries to guess it and the computer lets
> > # the player know if the guess is too high, too low
> > # or right on the money
> > #
> > # Chad Everett 2/10/2005
> >
> > import random
> >
> > print "\tWelcome to 'Guess My Number'!"
> > print "\nI'm thinking of a number between 1 and 100."
> > print "You Only Have Five Guesses.\n"
> >
> > # set the initial values
> > number = random.randrange(100) + 1
> > guess = int(raw_input("Go Ahead and Take a guess: "))
> > tries = 1
> >
> >
> > # guessing loop
> >
> >
> > while guess != number:
> >
> >      if (guess > number):
> >          print "Guess Lower..."
> >      else:
> >          print "Guess Higher..."
> >
> >      guess = int(raw_input("Take Another guess: "))
> >      tries += 1
> >
> >      print "You guessed it!  The number was", number
> >      print "And it only took you", tries, "tries!\n"
> >
> >      if tries == 5:
> >          print "Sorry You Lose!!!!"
> >          print "The Number was ", number
> >
> > raw_input("\n\nPress the enter key to exit.")
> >
> > THIS IS WHAT THE RESULTS LOOKS LIKE WHEN I RUN THE PROGRAM
> >
> > Welcome to 'Guess My Number'!
> >
> > I'm thinking of a number between 1 and 100.
> > You Only Have Five Guesses.
> >
> > Go Ahead and Take a guess: 99
> > Guess Lower...
> > Take Another guess: 98
> > You guessed it!  The number was 85
> > And it only took you 2 tries!
> >
> > Guess Lower...
> > Take Another guess: 44
> > You guessed it!  The number was 85
> > And it only took you 3 tries!
> >
> > Guess Higher...
> > Take Another guess: 55
> > You guessed it!  The number was 85
> > And it only took you 4 tries!
> >
> > Guess Higher...
> > Take Another guess: 33
> > You guessed it!  The number was 85
> > And it only took you 5 tries!
> >
> > Sorry You Lose!!!!
> > The Number was  85
> > Guess Higher...
> > Take Another guess:



From francis.girard at free.fr  Mon Feb  7 13:58:51 2005
From: francis.girard at free.fr (Francis Girard)
Date: Mon, 7 Feb 2005 19:58:51 +0100
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <6uSdnfAuvOkvL5rfRVn-3Q@comcast.com>
References: <dvOMd.33656$EG1.19314@lakeread04>
	<mailman.2093.1107799636.22381.python-list@python.org>
	<6uSdnfAuvOkvL5rfRVn-3Q@comcast.com>
Message-ID: <200502071958.51561.francis.girard@free.fr>

No. Just wanted to naively use one of the base tool Python had to offer. I 
tought it was very usable and very readable. I might be wrong.

Is there someone on this list using this tool and happy with it ? Or is my 
mind too much targeted on FP paradigm and most of you really think that all 
the functions that apply another function to each and every elements of a 
list are bad (like "reduce", "map", "filter") ?

Francis Girard

Le lundi 7 F?vrier 2005 19:25, Steven Bethard a ?crit?:
> Francis Girard wrote:
> > I'm very sorry that there is no good use case for the "reduce" function
> > in Python, like Peter Otten pretends. That's an otherwise very useful
> > tool for many use cases. At least on paper.
>
> Clarity aside[1], can you give an example of where reduce is as
> efficient as the eqivalent loop in Python?
>
> Steve
>
> [1] I generally find most reduce solutions much harder to read, but
> we'll set aside my personal limitations for the moment. ;)



From aahz at pythoncraft.com  Tue Feb  1 13:51:16 2005
From: aahz at pythoncraft.com (Aahz)
Date: 1 Feb 2005 13:51:16 -0500
Subject: Where are list methods documented?
References: <41ffba7d$0$15879$a1866201@visi.com>
	<mailman.1703.1107279798.22381.python-list@python.org>
	<41ffc3c4$0$10772$a1866201@visi.com> <r7k0f8sm.fsf@python.net>
Message-ID: <ctoj34$a6s$1@panix2.panix.com>

In article <r7k0f8sm.fsf at python.net>,
Thomas Heller  <theller at python.net> wrote:
>
>You could also have typed 'sort' in the box here:
>
>http://starship.python.net/crew/theller/pyhelp.cgi
>
>This search is also available in Mark Hammond's Mozilla Python sidebar.

...and as a link from python.org's documentation pages.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Given that C++ has pointers and typecasts, it's really hard to have a serious 
conversation about type safety with a C++ programmer and keep a straight face.
It's kind of like having a guy who juggles chainsaws wearing body armor 
arguing with a guy who juggles rubber chickens wearing a T-shirt about who's 
in more danger."  --Roy Smith, c.l.py, 2004.05.23


From sjmachin at lexicon.net  Wed Feb  2 18:03:07 2005
From: sjmachin at lexicon.net (John Machin)
Date: 2 Feb 2005 15:03:07 -0800
Subject: Crashing Python interpreter! (windows XP, python2.3.4, 2.3.5rc1,
	2.4.0)
In-Reply-To: <mailman.1763.1107365590.22381.python-list@python.org>
References: <mailman.1763.1107365590.22381.python-list@python.org>
Message-ID: <1107385387.320173.263380@o13g2000cwo.googlegroups.com>


Leeuw van der, Tim TOP-POSTED:
> Hi all,
>
> I can use this version of gtk and PyGtk to run simple programs. There
seems to be no problem with the code-completion in PythonWin.
> I can do: dir(gtk) without problems after importing the gtk module of
PyGtk, when I use idle or console. (Python version for this test:
python2.4, python 2.3.5rc1)
>
> I already knew that I could run simple PyGtk programs with this
combination of Python, PyGtk, and Gtk. Also knew already, that the code
completion in the PythonWin IDE works.
> The crash comes when invoked from pydev under eclipse. So I can't
remove them from the equation (I mentioned the problem also on the
Pydev Sourceforge-forum, but decided to post here since it's the
interpreter crashing).
>
> It's the "send/don't send" type of error box, so I choose "don't
send" at that point since that will only send crash info to
Microsoft... no point in that! :-)
>
> It could of course be a problem in the GTK DLLs and I haven't yet had
time to test with older GTK versions. Hopefully I can try that
tomorrow.
>
> cheers,
>
> --Tim
>
>
> -----Original Message-----
> From: python-list-bounces+tim.leeuwvander=nl.unisys.com at python.org
[mailto:python-list-bounces+tim.leeuwvander=nl.unisys.com at python.org]On
Behalf Of Stefan Behnel
> Sent: Wednesday, February 02, 2005 3:59 PM
> To: python-list at python.org
> Subject: Re: Crashing Python interpreter! (windows XP, python2.3.4,
2.3.5rc1, 2.4.0)
>
> Leeuw van der, Tim schrieb:
> > I'm using the following combination of software:
> > - Pydev Eclipse plugin (pydev 0.8.5)
> > - eclipse 3.0.1
> > - windows XP SP1
> > - pygtk 2.4.1
> > - GTK 2.6.1 (for windows32 native)
>
> > When trying to get a list of possible completions for the 'gtk'
import object, the python interpreter crashes. Happens with all
versions listed in the subject: python 2.3.4, 2.3.5rc1, 2.4.0.
> 

Do you have a file called drwtsn32.log anywhere on your computer?



From adam at cognitcorp.com  Tue Feb 15 19:06:41 2005
From: adam at cognitcorp.com (Adam DePrince)
Date: Tue, 15 Feb 2005 19:06:41 -0500
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <1114tjagfelgrd9@corp.supernews.com>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<cupstp$an7$2@ctb-nnrp2.saix.net> <cupupa$kfs$2@usenet.otenet.gr>
	<cupvhi$c15$1@news1.ucsd.edu> <cuq084$r99$1@usenet.otenet.gr>
	<cuq2h0$j2s$1@eeyore.INS.cwru.edu> <cuq57b$j83$1@usenet.otenet.gr>
	<37bkemF5a7s7vU1@individual.net> <cut6nh$rpk$1@usenet.otenet.gr>
	<86ll9piuj8.fsf@guru.mired.org> <cutf1h$576$1@usenet.otenet.gr>
	<mailman.2643.1108495246.22381.python-list@python.org>
	<cutibq$j8e$1@usenet.otenet.gr>
	<mailman.2647.1108497874.22381.python-list@python.org>
	<cutld5$30s$1@usenet.otenet.gr>  <1114tjagfelgrd9@corp.supernews.com>
Message-ID: <1108512400.3859.87.camel@localhost.localdomain>

On Tue, 2005-02-15 at 17:24, Jeff Shannon wrote:
> Ilias Lazaridis wrote:
> 
> > Adam DePrince wrote:
> > [...]
> >> You're on it.  You drive a car?  You have to treat it right to get what
> >> you want, right?  Same here.  Ask correctly, and you will get your
> >> answers.  
> > Your interpretation/definition of "asking correctly" is irrelevant to me.
> "Interpretation is irrelevant.  Logic is irrelevant.  You will be 
> assimilated."

Oy!  Logic is relevant ... let me explain.

Let this be a gentle reminder to all, the primary hazard of generosity
is that the recipient will lack a corresponding sense of appreciation. 
I've heard others around here say that they will risk feeding a troll on
the off chance that they may actually enlighten someone.  

Further investigation (http://lazaridis.com/core/project/email) suggests
that it is the Python community that is at fault.  There is a scepter
haunting the python-list.  Ilias, we misjudged you and mistook your
hyper efficiency and superior cognitive capacity for rudeness.  As I
reflect upon this exchange I now see the inefficient absence of
terseness and lack of condescending ridicule.  I call forth on all
Pythoners to adopt your style of thought, learn to spell Nietzsche, put
aside their personal consideration and accept their subservience to the
common good (as defined by Ilias) and the nubile newbie.  Think of what
we could acheive.  We could be just like gwbasic!  As hip and modern as
the Kondrad Zuse's Z3.  Pythoner's Unite!

Ilias, I ceed.  You are a superman in the most misinterpreted sense of
the word.  I invoke Gershwin's law and end this thread.   May I bear
your children?


Adam DePrince 




From jjreavis at gmail.com  Mon Feb  7 12:54:00 2005
From: jjreavis at gmail.com (Jeff  Reavis)
Date: 7 Feb 2005 09:54:00 -0800
Subject: Python on WWW - beginners question: what to choose?
References: <cu82v8$2f17$1@news.vol.cz>
Message-ID: <1107798840.675820.79680@o13g2000cwo.googlegroups.com>

Spyce has support for Cheetah Templates:
http://spyce.sourceforge.net/doc-mod_template.html
as well as pooling:
http://spyce.sourceforge.net/doc-mod_pool.html

Spyce templates are converted into python before execution, and you can
enable caching in the Spyce configuration file.  Spyce also comes with
a script that will let you compile the templates on the command line so
you can see the resulting python code (run_spyceCmd.py I believe).

hope that helps,
-jjr



From newsgroups at jhrothjr.com  Sun Feb 20 10:47:48 2005
From: newsgroups at jhrothjr.com (John Roth)
Date: Sun, 20 Feb 2005 09:47:48 -0600
Subject: introspection inquiry
References: <1108910710.985704.264430@c13g2000cwb.googlegroups.com>
	<4218A579.2060503@jessikat.fsnet.co.uk>
	<cvaaae$77q$1@gemini.csx.cam.ac.uk>
Message-ID: <111hcaqc26f3bbf@news.supernews.com>


"Michael Hoffman" <cam.ac.uk at mh391.invalid> wrote in message 
news:cvaaae$77q$1 at gemini.csx.cam.ac.uk...
> Robin Becker wrote:
>> self.__class__.__name__
>
> Unless I misunderstood the question, that won't work. That will
> give you the name of the class the object is an instance is of.
> I think he wants the name of the class the method was defined in.

If that's the case, then the inspect module should give
the tools to do it without a great deal of angst. Unfortunately,
it doesn't give you the class that defined the method, just
the class that invoked it.

John Roth




From bac at OCF.Berkeley.EDU  Mon Feb  7 18:35:45 2005
From: bac at OCF.Berkeley.EDU (Brett C)
Date: Mon, 07 Feb 2005 15:35:45 -0800
Subject: python-dev Summary for 2005-01-01 through 2005-01-15
Message-ID: <4207FB51.2020702@ocf.berkeley.edu>

This is a summary of traffic on the `python-dev mailing list`_ from January 01, 
2005 through January 15, 2005.  It is intended to inform the wider Python 
community of on-going developments on the list.  To comment on anything 
mentioned here, just post to `comp.lang.python`_ (or email 
python-list at python.org which is a gateway to the newsgroup) with a subject line 
mentioning what you are discussing. All python-dev members are interested in 
seeing ideas discussed by the community, so don't hesitate to take a stance on 
something.  And if all of this really interests you then get involved and join 
`python-dev`_!

This is the fifty-sixth summary written by Brett Cannon (I don't want to do my
homework).

To contact me, please send email to brett at python.org ; I do not have the 
time to keep up on comp.lang.python and thus do not always catch follow-ups 
posted there.

All summaries are archived at http://www.python.org/dev/summary/ .

Please note that this summary is written using reStructuredText_ which can be 
found at http://docutils.sf.net/rst.html .  Any unfamiliar punctuation is 
probably markup for reST_ (otherwise it is probably regular expression syntax 
or a typo =); you can safely ignore it, although I suggest learning reST; it's 
simple and is accepted for `PEP markup`_ and gives some perks for the HTML 
output.  Also, because of the wonders of programs that like to reformat text, I 
cannot guarantee you will be able to run the text version of this summary 
through Docutils_ as-is unless it is from the `original text file`_.

.. _PEP Markup: http://www.python.org/peps/pep-0012.html

The in-development version of the documentation for Python can be found at
http://www.python.org/dev/doc/devel/ and should be used when looking up any
documentation on new code; otherwise use the current documentation as found at
http://docs.python.org/ .  PEPs (Python Enhancement Proposals) are located at 
http://www.python.org/peps/ .  To view files in the Python CVS online, go to 
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/python/ .  Reported bugs and 
suggested patches can be found at the SourceForge_ project page.

The `Python Software Foundation`_ is the non-profit organization that holds the 
intellectual property for Python.  It also tries to forward the development and 
use of Python.  But the PSF_ cannot do this without donations.  You can make a 
donation at http://python.org/psf/donations.html .  Every penny helps so even a 
small donation (you can donate through PayPal or by check) helps.

.. _python-dev: http://www.python.org/dev/
.. _SourceForge: http://sourceforge.net/tracker/?group_id=5470
.. _python-dev mailing list: http://mail.python.org/mailman/listinfo/python-dev
.. _comp.lang.python: http://groups.google.com/groups?q=comp.lang.python
.. _Docutils: http://docutils.sf.net/
.. _reST:
.. _reStructuredText: http://docutils.sf.net/rst.html
.. _PSF:
.. _Python Software Foundation: http://python.org/psf/

.. contents::

.. _last summary: http://www.python.org/dev/summary/2004-12-16_2004-12-31.html
.. _original text file: http://www.python.org/dev/summary/2005-01-01_2005-01-15.ht



=====================
Summary Announcements
=====================
PyCon_ will be upon us come late March!  Still time to plan to go.

A warning on the thoroughness off this summary is in order.  While trying to 
delete a single thread of email I managed to accidentally delete my entire 
python-dev mailbox.  I did the best I could to retrieve the emails but it's 
possible I didn't resuscitate all of my emails, so I may have overlooked something.

.. _PyCon: http://www.pycon.org/

=======
Summary
=======
-------------
PEP movements
-------------
tip:: PEP updates by email are available as a topic from the `Python-checkins`_ 
mailing list.

`PEP 246`_ was a major topic of discussion during the time period covered by 
this summary.  This all stemmed from `Guido's blog`_ entries on optional type 
checking. This led to a huge discussion on many aspects of protocols, 
interfaces, and adaptation and the broadening of this author's vocabulary to 
include "Liskov violation".

"Monkey typing" also became a new term to know thanks to Phillip J. Eby's 
proto-PEP on the topic (found at 
http://peak.telecommunity.com/DevCenter/MonkeyTyping).  Stemming from the 
phrase "monkey see, monkey do", it's Phillip version of taking PEP 246 
logically farther (I think; the whole thing is more than my currently 
burned-out-on-school brain can handle right now).

.. _Python-checkins: http://mail.python.org/mailman/listinfo/python-checkins
.. _PEP 246: http://www.python.org/peps/pep-0246.html
.. _Guido's blog: http://www.artima.com/weblogs/index.jsp?blogger=guido

Contributing threads:
   - `getattr and __mro__ 
<http://mail.python.org/pipermail/python-dev/2005-January/050907.html>`__
   - `Son of PEP 246, redux 
<http://mail.python.org/pipermail/python-dev/2005-January/050972.html>`__
   - `PEP 246: lossless and stateless 
<http://mail.python.org/pipermail/python-dev/2005-January/051023.html>`__
   - `PEP 246: LiskovViolation as a name 
<http://mail.python.org/pipermail/python-dev/2005-January/050878.html>`__
   - `"Monkey Typing" pre-PEP, partial draft 
<http://mail.python.org/pipermail/python-dev/2005-January/051124.html>`__


------------------------------------------------------------------------------------
Optional type checking: how to inadvertently cause a flame war worse than 
decorators
------------------------------------------------------------------------------------
`Guido's blog`_ had comments on the idea of adding optional static type 
checking to Python.  While just comments in a blog, it caused a massive 
response from people, mostly negative from what I gathered.  After Guido 
discussed things some more it culminated in a blog entry found at 
http://www.artima.com/weblogs/viewpost.jsp?thread=87182 that lays out what his 
actual plans are.  I highly recommend reading it since it suggests adding 
optional run-time type checking for function arguments along with some other 
proposals.

All of this led to `PEP 246`_ getting updated.  For some more details on that 
see the `PEP movements`_ section of this summary.

And if there is a lesson to be learned from all of this, it's that when Alex 
Martelli and Phillip J. Eby start a technical discussion it's going to be long, 
in-depth, complex, and lead to my inbox being brimming in python-dev email.


------------------------------
Let's get the AST branch done!
------------------------------
Guido posted an email to the list stating he would like to to make progress 
towards integrating "things like type inferencing, integrating PyChecker, or 
optional static type checking" into Python.  In order to make that easier he 
put out a request that people work on the AST branch and finish it.

For those that don't know about Python's back-end, the compiler as it stands 
now takes the parse tree from the parser and emits bytecode directly from that. 
  This is far from optimal since the parse tree is more verbose than needed and 
it is not the easiest thing to work with.

The AST branch attempts to fix this by taking a more traditional approach to 
compiling.  This means the parse tree is used to generate an AST (abstract 
syntax tree; and even more technically could be considered a control flow graph 
in view of how it is implemented) which in turn is used to emit bytecode.  The 
AST itself is much easier to work with when compared to the parse tree; better 
to know you are working with an 'if' guard thanks to it being an 'if' node in 
the AST than checking if the parse tree statement you are working with starts 
with 'if' and ends with a ':'.

While all of this sounds great, the issue is the AST branch is not finished 
yet.  It is not entirely far off, but new features from 2.4 (decorators and 
generator expressions) need to be added along with more bug fixing and clean up.

This means the AST branch is going to get finished for 2.5 somehow.  But help 
is needed.  While the usual suspects who have previously contributed to the 
branch are hoping to finish it, more help is always appreciated.  If you care 
to get involved, check out the AST branch (tagged as 'ast-branch' in CVS; see 
the `python-dev FAQ`_ on how to do a tagged branch checkout), read 
Python/compile.txt and just dive in!  There will also be a sprint on the AST 
branch at PyCon.

.. _python-dev FAQ: http://www.python.org/dev/devfaq.html

Contributing threads:
   - `Please help complete the AST branch 
<http://mail.python.org/pipermail/python-dev/2005-January/050606.html>`__
   - `Will ASTbranch compile on windows yet? 
<http://mail.python.org/pipermail/python-dev/2005-January/050633.html>`__
   - `ast branch pragmatics 
<http://mail.python.org/pipermail/python-dev/2005-January/050690.html>`__
   - `Re: [Python-checkins] python/dist/src/Python pythonrun.c, 2.161.2.15, 
2.161.2.16 
<http://mail.python.org/pipermail/python-dev/2005-January/050786.html>`__


--------------------------------
Ditching unbound methods in Py3k
--------------------------------
Guido suggested removing unbound methods from Python since their usefulness of 
checking their first argument and other slight differences from functions just 
didn't seem worth keeping around and complicating the language.  So the idea 
seems sound.

But then people with uses for the extra information kept in unbound methods 
(im_func and im_self) popped up.  To make the long thread short, enough people 
stepped up mentioning uses they had for the information for Guido to retract 
the suggestion in the name of backwards compatibility.

But unbound methods are now on the list of things to go in Python 3000.

Contributing threads:
   - `Let's get rid of unbound methods 
<http://mail.python.org/pipermail/python-dev/2005-January/050625.html>`__
   - `Getting rid of unbound methods: patch available 
<http://mail.python.org/pipermail/python-dev/2005-January/051128.html>`__
   - `PEP 246 - concrete assistance to developers of new	adapter classes 
<http://mail.python.org/pipermail/python-dev/2005-January/051246.html>`__


------------------------------------------
Getting exceptions to be new-style classes
------------------------------------------
A patch to allow exceptions to be new-style classes is currently at 
http://www.python.org/1104669 .  The plan is to get that patch in order, apply 
it, and as long as a ton of code does not break from exceptions moving from 
classic to new-style classes it will be made permanent in 2.5 .

This in no way touches on the major changes as touched upon in a `previous 
summary 
<http://www.python.org/dev/summary/2004-09-01_2004-09-15.html#cleaning-the-exception-house>`__ 
which will need a PEP to get the hierarchy cleaned up and discuss any possible 
changes to bar 'except' statements.

Contributing threads:
   - `Exceptions *must*? be old-style classes? 
<http://mail.python.org/pipermail/python-dev/2005-January/051097.html>`__

-----------------------------
Recent IBM patents and Python
-----------------------------
note:: contributed by Jim Jewett

Current python policy is that all submissions must be unemcumbered
by intellectual property claims.  See 
http://www.python.org/psf/psf-contributor-agreement.html

IBM has recently released several patents for use in Open Source
Software, with the restriction that they can revoke the grant if you
sue to enforce any Intellectual Property rights against any Open
Source project.

Is this an acceptable license restriction, or should code covered by
these patents be rejected?  No explicit decision was made.

Contributing threads:
   - `Recent IBM Patent releases 
<http://mail.python.org/pipermail/python-dev/2005-January/050919.html>`__

===============
Skipped Threads
===============
- Mac questions
- 2.3.5 schedule, and something I'd like to get in
-  csv module TODO list
- an idea for improving struct.unpack api
- Minor change to behaviour of csv module
- PATCH/RFC for AF_NETLINK support
- logging class submission
- frame.f_locals is writable
- redux: fractional seconds in strptime
- Darwin's realloc(...) implementation never shrinks allocations


From steven.bethard at gmail.com  Fri Feb 11 14:35:29 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 11 Feb 2005 12:35:29 -0700
Subject: check if object is number
In-Reply-To: <mailman.2412.1108150299.22381.python-list@python.org>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
	<mailman.2412.1108150299.22381.python-list@python.org>
Message-ID: <q_GdnbOXEIVhlZDfRVn-2Q@comcast.com>

Bill Mill wrote:
> On Fri, 11 Feb 2005 12:11:44 -0700, Steven Bethard
> <steven.bethard at gmail.com> wrote:
> 
>>Is there a good way to determine if an object is a numeric type?
> 
> How about:
> if type(variable) == type(1):
>     print "is an integer"
> else:
>     print "please input an integer" 

This checks if it is an integer, not if it is a numeric type:

py> x = 1
py> type(x) == type(1)
True
py> # using int instead of type(1)
py> type(x) == int
True
py> x = 1.0
py> type(x) == int
False

Steve


From newsgroups at jhrothjr.com  Wed Feb 16 16:39:14 2005
From: newsgroups at jhrothjr.com (John Roth)
Date: Wed, 16 Feb 2005 15:39:14 -0600
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net>
Message-ID: <1117fdndk3pi74@news.supernews.com>


"Leo Breebaart" <leo at lspace.org> wrote in message 
news:37hippF4gcimiU1 at individual.net...
> I've tried Googling for this, but practically all discussions on
> str.join() focus on the yuck-ugly-shouldn't-it-be-a-list-method?
> issue, which is not my problem/question at all.
>
> What I can't find an explanation for is why str.join() doesn't
> automatically call str() on its arguments, so that e.g.
> str.join([1,2,4,5]) would yield "1245", and ditto for e.g.
> user-defined classes that have a __str__() defined.
>
> All I've been able to find is a 1999 python-dev post by Tim
> Peters which would seem to indicate he doesn't understand it
> either:
>
>    "string.join(seq) doesn't currently convert seq elements to
>     string type, and in my vision it would. At least three of us
>     admit to mapping str across seq anyway before calling
>     string.join, and I think it would be a nice convenience
>     [...]"
>
> But now it's 2005, and both string.join() and str.join() still
> explicitly expect a sequence of strings rather than a sequence of
> stringifiable objects.
>
> I'm not complaining as such -- sep.join(str(i) for i in seq) is
> not *that* ugly, but what annoys me is that I don't understand
> *why* this was never changed. Presumably there is some
> counter-argument involved, some reason why people preferred the
> existing semantics after all. But for the life of me I can't
> think what that counter-argument might be...
>
> -- 
> Leo Breebaart  <leo at lspace.org> 



From pedro.werneck at terra.com.br  Sat Feb  5 11:52:44 2005
From: pedro.werneck at terra.com.br (Pedro Werneck)
Date: Sat, 5 Feb 2005 14:52:44 -0200
Subject: Trouble converting hex to decimal?
In-Reply-To: <1107611491.18588.26.camel@dulcevida>
References: <1107611491.18588.26.camel@dulcevida>
Message-ID: <20050205145244.0a474ae1.pedro.werneck@terra.com.br>

Hi

The problem is that '\x00' is a escape sequence... 

Try something like this:


>>> x = '\x00'
>>> int(repr(x)[3:-1], 16)
0
>>> x = '\x15'
>>> int(repr(x)[3:-1], 16)
21
>>> 



On Sat, 05 Feb 2005 06:51:32 -0700
Earl Eiland <eee at nmt.edu> wrote:

> I'm trying to process the IP packet length field, as recorded by pcap
> (Ethereal) and recovered using pcapy.  When I slice out those bytes, I
> get a value that shows in '\x00' format, rather than '0x00'.  Neither
> int() nor eval() are working.  How do I handle this?
> 
> Earl Eiland
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list


From tjreedy at udel.edu  Fri Feb 11 17:50:11 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 11 Feb 2005 17:50:11 -0500
Subject: frozenset() without arguments should return a singleton
References: <cuj06r$ep5$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <cujcne$4cq$1@sea.gmane.org>


"Stefan Behnel" <stefan.behnel-n05pAM at web.de> wrote in message 
news:cuj06r$ep5$1 at lnx107.hrz.tu-darmstadt.de...
> Hi!
>
> frozenset() doesn't behave as the other immutable empty data types in 
> 2.4:
>
> .>>> '' is ''
> True
> .>>> () is ()
> True

I believe the reference manual describes this sort of behavior for 
immutables as an *optional* optimization.  0 is 0 and has been since at 
least 1.3.  I am not sure both of your statements above have been true as 
long, but I not longer have 1.3 to check ;-).

> .>>> frozenset() is frozenset()
> False

> frozenset() called without arguments (or on empty sequences)
> should always return a singleton object.

If we interpret 'should' as 'preferably by me', ok.

>It is immutable, so I can't see a reason why it should take up more 
>resources than necessary.

It will take some programmer's time to add the special case check and run 
the test suite, and check in the changes.  Yours?  And perhaps some 
execution time for each frozenset call.  Since frozenset is not much used, 
and multiple empty frozensets very rare, and the difference mostly 
invisible, the frozenset implementor probably went on to other things.

Terry J. Reedy






From junk at mdibb.net  Tue Feb  1 18:19:49 2005
From: junk at mdibb.net (Matt D)
Date: Tue, 01 Feb 2005 23:19:49 +0000
Subject: web camera or else ? 15-30 fps processing of camera videos.
In-Reply-To: <1107295229.657375.318750@o13g2000cwo.googlegroups.com>
References: <1107295229.657375.318750@o13g2000cwo.googlegroups.com>
Message-ID: <36ah30F4tlp7bU1@individual.net>

Newbie wrote:
> I am doing some robotics projects but my main area of interest is
> trying out several algorithms for the processing of the stream of data
> coming from the video.

<snip>

Same for me!  From what I can tell, a cheap webcam will "just work" with 
a recent version of windows - i.e. plug it in using USB and then you can 
have programmatic access to the data and grab frames very easily.  This 
setup works fine with my digital camera working as a webcam - real ?10 
webcams should be the same.  Not sure what Linux compatibility is like 
these days - for that I know for a fact that the Hauppauge USB WinTV 
thing works (or at least the hardware version I have works) with Linux.

For linux I found this (now on the wayback archive - original page is 
now 404): 
http://web.archive.org/web/20020322015936/http://staff.aist.go.jp/naoyuki.ichimura/research/tips/v4ln_e.htm

Hopefully that is some help.

Oh by the way, speed on a modern machine shouldn't be an issue - my 
badly written prototype in visual basic of all things (dont laugh - 
seemed like a good idea at the time!) was tracking a single coloured 
object reliably at significantly greater than 30fps (it automatically 
altered the window it searched in based on size and amount of movement 
of the object - at times it was approaching 100fps) on a modest by 
today's standards 1.4ghz pc, using a 320x240 stream.



From rkern at ucsd.edu  Tue Feb  8 03:22:25 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Tue, 08 Feb 2005 00:22:25 -0800
Subject: Big development in the GUI realm
In-Reply-To: <mailman.2145.1107846160.22381.python-list@python.org>
References: <mailman.2123.1107820051.22381.python-list@python.org>	<4208373e$0$21620$a1866201@visi.com>
	<cu9eg0$9jb$1@news1.ucsd.edu>
	<mailman.2145.1107846160.22381.python-list@python.org>
Message-ID: <cu9srs$dif$1@news1.ucsd.edu>

Francis Girard wrote:
[I wrote:]
>>In any case, he may be right, and the FSF, Trolltech, and you could all
>>be wrong. Your intention when you use the GPL may be moot if a judge
>>determines that the text itself and copyright law does not support your
>>interpretation.
> 
> 
> I'm sorry to jump into this thread without any knowledge of these issues. I 
> was just wondering if it did happen. Did some law court, over the past 
> decade, had to make a decision about GPL on some real issue ? 

Not about this issue, I don't believe. There was some flap between MySQL 
AB and NuSphere Corporation concerning *static* linking, but that case 
was settled before the judge ruled on whether static linking creates a 
derivative work[1].

Larry Rosen's book _Open Source Licensing_ covers these issues (and 
their lack of case law) pretty thoroughly[2].

[1] http://www.mysql.com/news-and-events/press-release/release_2002_14.html
[2] http://www.rosenlaw.com/oslbook.htm

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From mogmios at mlug.missouri.edu  Thu Feb  3 12:14:51 2005
From: mogmios at mlug.missouri.edu (Michael)
Date: Thu, 03 Feb 2005 09:14:51 -0800
Subject: Finding user's home dir
In-Reply-To: <s9zvf99218i.fsf@salmakis.intevation.de>
References: <5i9rtc.rq31.ln@orion.homeinvalid>	<mailman.1800.1107419518.22381.python-list@python.org>	<GcKdnaOlaN41tJ_fRVn-rg@powergate.ca>
	<s9zvf99218i.fsf@salmakis.intevation.de>
Message-ID: <42025C0B.1070807@mlug.missouri.edu>

My own, less than perfect, way of finding the users home directory is 
like this:

def personal_directory ( default = None ):
    pdir = None
    if sys.platform.startswith ( 'win' ):
        import _winreg
        reg = _winreg.ConnectRegistry ( None, _winreg.HKEY_CURRENT_USER )
        pkey = _winreg.OpenKey ( reg, 
r"Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders" )
        pdir = _winreg.QueryValueEx ( pkey, 'Personal' )[0]
        _winreg.CloseKey ( pkey )
        _winreg.CloseKey ( reg )
    else:
        pdir = os.getenv ( 'HOME' )
    if not pdir:
        pdir = default
    return pdir

--
Michael <mogmios at mlug.missouri.edu>
http://kavlon.org



From python-list at outershell.co.uk  Sat Feb 19 05:34:47 2005
From: python-list at outershell.co.uk (Phil Jackson)
Date: Sat, 19 Feb 2005 10:34:47 +0000
Subject: Can I get message filename from a Maildir mailbox stream?
In-Reply-To: <1108778311.300124.56920@f14g2000cwb.googlegroups.com>
	(noah@noah.org's message of "18 Feb 2005 17:58:31 -0800")
References: <1108778311.300124.56920@f14g2000cwb.googlegroups.com>
Message-ID: <87bragn8hk.fsf@outershell.co.uk>

noah at noah.org writes:

> Is there a way to figure out what filename an email object points to
> in a qmail style Maildir directory?

What do you mean bu "email object"? Surely if you are iterating a
Maildir then you should have the filename. Or am I misunderstanding
what you mean?

Phil


From grig.gheorghiu at gmail.com  Sat Feb 12 12:41:48 2005
From: grig.gheorghiu at gmail.com (Grig Gheorghiu)
Date: 12 Feb 2005 09:41:48 -0800
Subject: Unittesting for web applications
References: <mailman.2443.1108204994.22381.python-list@python.org>
Message-ID: <1108230108.900837.187660@c13g2000cwb.googlegroups.com>

There's another current thread on c.l.py talking about testing Web
applications. Somenone suggested Jython in conjunction with HttpUnit, a
combination that worked for me too -- but the name HttpUnit is
misleading, since it does functional/black box testing and not unit
testing. It beats scraping Web pages though, so it may be sufficient
for what you need. You can see a mini-tutorial I wrote at
http://agiletesting.blogspot.com/2005/02/web-app-testing-with-jython-and.html

I don't know any Python-specific frameworks for Web app unit testing.
In the Java world, there's Cactus at http://jakarta.apache.org/cactus/.
To quote from that page, "Cactus is a simple test framework for unit
testing server-side java code (Servlets, EJBs, Tag Libs, Filters,
...)." So this is pretty much Java-centric and may not help you much.



From VBoycheva at jea.net  Thu Feb 10 11:50:20 2005
From: VBoycheva at jea.net (Valentina Boycheva)
Date: Thu, 10 Feb 2005 11:50:20 -0500
Subject: executing VBScript from Python and vice versa
Message-ID: <51B182D9911B914EA2243227834E86C005CB0774@jeamail.jea.net>

A while ago I asked how VBScript can be called from Python. The two answers
I received suggested using win32com.client and
MSScriptControl.ScriptControl. This solution required embedding the VBScript
code inside the Python script.

Here's  a shell approach that runs an existing VBScript file:

Python script
import os
import sys
os.system("F:\Projects\Doc\Scripts\VBScript\WriteDataToTextFile.vbs")

VBScript:
' WriteDataToTextFile.vbs
Const ForAppending = 8
Set objFSO = CreateObject("Scripting.FileSystemObject")
Set objTextFile = objFSO.OpenTextFile _
    ("c:\temp\temp.txt", ForAppending, True)
Set objNetwork = CreateObject("Wscript.Network")
objComputerName = objNetwork.ComputerName
objTextFile.WriteLine("My computer's name is")
objTextFile.WriteLine(objComputerName)
objTextFile.Close



From fuzzyman at gmail.com  Wed Feb  2 08:29:43 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 2 Feb 2005 05:29:43 -0800
Subject: CONTEST - What is the (best) solution?
In-Reply-To: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
References: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
Message-ID: <1107350983.411793.146600@g14g2000cwa.googlegroups.com>

Can your dictionaries contain dictionaries ?

If not you can read the file and cut at the first '}' and the last '{'.
The two chunks will then be a single dictionary which can be eval'd.

*However* your example above does not show ',' between all of the
pairs... but only some. This will bugger you royally (because you can't
even replace '\n' with ','). You'd then need to parse the two chunks
and correct.....
Regards,


Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From quentel.pierre at wanadoo.fr  Sun Feb  6 03:23:49 2005
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Sun, 06 Feb 2005 09:23:49 +0100
Subject: How to read POSTed data
In-Reply-To: <mailman.1980.1107622913.22381.python-list@python.org>
References: <mailman.1980.1107622913.22381.python-list@python.org>
Message-ID: <4205d419$0$6610$8fcfb975@news.wanadoo.fr>

Here is an example of how to get the POST data :

#    def do_POST(self):
#        ctype, pdict = 
cgi.parse_header(self.headers.getheader('content-type'))
#        length = int(self.headers.getheader('content-length'))
#        if ctype == 'multipart/form-data':
#            self.body = cgi.parse_multipart(self.rfile, pdict)
#        elif ctype == 'application/x-www-form-urlencoded':
#            qs = self.rfile.read(length)
#            self.body = cgi.parse_qs(qs, keep_blank_values=1)
#        else:
#            self.body = {}                   # Unknown content-type
#        # throw away additional data [see bug #427345]
#        while select.select([self.rfile._sock], [], [], 0)[0]:
#            if not self.rfile._sock.recv(1):
#                break
#        self.handle_data()

where handle_data() is the method where you will process the data received

The part related to bug #427345 is copied from CGIHTTPServer

For an example of use you can take a look at the CustomHTTPServer in 
Karrigell (http://karrigell.sourceforge.net)

A+,
Pierre


From martin at v.loewis.de  Wed Feb 16 18:48:59 2005
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 17 Feb 2005 00:48:59 +0100
Subject: supress creation of .pyc files
In-Reply-To: <pan.2005.02.16.13.53.22.459631@thomas-guettler.de>
References: <pan.2005.02.16.13.53.22.459631@thomas-guettler.de>
Message-ID: <4213dbeb$0$27559$9b622d9e@news.freenet.de>

Thomas Guettler wrote:
> Is there a way to import a file without creating
> a .pyc file?

That is part of PEP 304, which is not implemented
yet, and apparently currently stalled due to lack
of interest.

Regards,
Martin


From socheat-news at iomanip.com  Tue Feb  1 12:12:15 2005
From: socheat-news at iomanip.com (Socheat Sou)
Date: Tue, 01 Feb 2005 12:12:15 -0500
Subject: Advice on OSX cocoa app with Python backend
In-Reply-To: <41FF8310.7050801@holdenweb.com>
References: <1107242909.3662.10.camel@temp.ant>
	<41FF8310.7050801@holdenweb.com>
Message-ID: <1107277936.7968.19.camel@temp.ant>

On Tue, 2005-02-01 at 08:24 -0500, Steve Holden wrote:

> Who told you that MySQL was OO? It's a bog-standard relational back-end 
> with transactional capabilities.

After re-reading my message, I saw how unclear I was. :)  I didn't mean
to say that MySQL was OO.  I meant that, we were going to use MySQL as
the RDBMS, but some have suggested looking into OODBMS, like PostgreSQL,
but from what I know of OODBMS they don't seem like the right fit for
this project.

Thanks for the advice guys!  So it sounds like I have the general idea
right, but there isn't anything (in the way of already written programs)
that will ease the creation of the backend app.  Just get my hands dirty
with the frameworks and write it myself, eh?

Socheat



From nospam at me.invalid  Tue Feb  8 15:10:47 2005
From: nospam at me.invalid (anthonyberet)
Date: Tue, 08 Feb 2005 20:10:47 +0000
Subject: newbie wants to compile python list of filenames in selected
 directories
In-Reply-To: <1107746663.376521.170050@o13g2000cwo.googlegroups.com>
References: <36n60uF520lfaU1@individual.net>
	<1107746663.376521.170050@o13g2000cwo.googlegroups.com>
Message-ID: <36skmbF567us8U1@individual.net>

M.E.Farmer wrote:
> anthonyberet wrote:
> 
>>Hi, I am new at Python, and very rusty at the one language I was good
> 
> 
>>at, which was BASIC.
>>
>>I want to write a script to compare filenames in chosen directories,
> 
> on
> 
>>windows machines. Ideally it would compose a list of strings of all
> 
> the
> 
>>filenames in the directories, and those directories would be chosable
> 
> by
> 
>>the user of the script.
>>
>>I am quite happy to do my own legwork on this , I realise it is
> 
> simple
> 
>>stuff, but can anyone point me in the right direction to start?
>>
>>Thanks
> 
> 
> Cool! I like your attitude ;)
> Others have given you a good start with os. In case you don't know os
> has a great many path manipulation methods. Always try to use them so
> you can insulate yourself from cross platform path nightmares.
> A few of the highlights are:
> 
> ### split a path
> py> parts = os.path.split(r'c:\windows\media\ding.wav')
> py> print parts
> ('c:\\windows\\media', 'ding.wav')
> 
> ### join a path and part and do it right on any platform
> py> path = os.path.join('c:\\windows\\media', 'ding.wav')
> 'c:\\windows\\media\\ding.wav'
> 
> ### get basename of the file
> py> base = os.path.basename('c:\\windows\\media\\ding.wav')
> py> print base
> 'ding.wav'
> 
> Plus many more, be sure to study the os module if you are doing any
> path manipulations.
> 
> Ok and now for something sorta different( alright, I was really bored )
> 
> . def glob_dir(dir):
> .     """Return a list of *.py* (.py, .pyc, .pyo, .pyw)
> .        files from a given directory.
> .     """
> .     import glob, os
> .     # Get a list of files that match *.py*
> .     GLOB_PATTERN = os.path.join(dir, "*.[p][y]*")
> .     pathlist = glob.glob(GLOB_PATTERN)
> .     return pathlist
> .
> . def list_dir(dir):
> .     ''' Another way to filter a dir '''
> .     import os
> .     pathlist = os.listdir(dir)
> .     # Now filter out all but py and pyw
> .     filterlist = [x for x in pathlist
> .                        if x.endswith('.py')
> .                        or x.endswith('.pyw')]
> .    return filterlist
> hth,

Thanks to everyone who responded - I feel on my way now, just being able 
to tap 'os python' and 'lisdir python' into Google has netted me plenty 
of reading material - but I would have taken a long time to find that 
out without your tips!
I will surely come back, but not until I get I get stuck :)


From http  Mon Feb 14 19:46:43 2005
From: http (Paul Rubin)
Date: 14 Feb 2005 16:46:43 -0800
Subject: is there a safe marshaler?
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<1108051828.483222.62670@z14g2000cwz.googlegroups.com>
	<7xmzu6q4cv.fsf@ruckus.brouhaha.com>
	<4211185b$0$28982$e4fe514c@news.xs4all.nl>
	<7xbramzt1c.fsf@ruckus.brouhaha.com>
	<42112b1e$0$28978$e4fe514c@news.xs4all.nl>
	<7xacq6sqej.fsf@ruckus.brouhaha.com>
	<421130ae$0$28984$e4fe514c@news.xs4all.nl>
	<7x3bvyiuin.fsf@ruckus.brouhaha.com>
	<42113b3b$0$28991$e4fe514c@news.xs4all.nl>
Message-ID: <7xbramejkc.fsf@ruckus.brouhaha.com>

Irmen de Jong <irmen.NOSPAM at xs4all.nl> writes:
> > Note you should also put sequence numbers in the messages, to stop
> > the attacker from fooling you by selectively deleting or replaying
> > messages.
> 
> Thanks for the tip. I'll think about this.

Hmm, you also want a random blob in each packet (including the session
start) included in the authentication of the next packet, so the
attacker can't cut and paste messages from old sessions into the
current ones.  You know, by the time you're through designing this you
may be better off just using SSL and getting it over with.  It's very
easy to make mistakes designing these types of protocols.  There are
some reasonable examples in "Applied Cryptography", but maybe you
don't want to deal with this stuff.

> Well, my experience with RMI is very limited (and from a few years ago)
> but I remember that you are required to set a security manager on your
> RMI objects. I always used Java's default rmi security manager but I
> honestly don't know what it actually does :-D

Thanks, I should try to find out more about this.  I'm about to be
doing some stuff with an existing RMI app and I better make sure it's
not already vulnerable.

> I label things like SOAP and XML-RPC much different than RMI or Pyro,
> because they (SOAP) are much more "distant" from the actual
> programming language and environment beneath them. I don't know if
> this is good thinking or not but the fact that RMI and Pyro expose
> language features directly, and SOAP not, makes that I reason about them
> differently.

Hmm, I sort of understand this, but not completely.  Does DCOM or .NET
expose language features directly?

> Then again, Pyro allows you to use two forms of XML serialization
> on the wire (instead of pickle), which may or may not move it much closer
> to SOAP and the likes. But there are other reasons for not wanting
> a Pyro server exposed on the internet. Such as the lack of a good
> security analisys of Pyro. Perhaps it suffers from similar holes
> as XMLRPC until recently...

I've been meaning to look at Pyro and will certainly let you know if I
spot any problems, but of course there might be some that I don't find.

> Furthermore there are practical issues such as having to
> open a buch of new ports in your firewall. In my experience
> this is very hard to get done, sadly, in contrast to just
> exposing a "web-service" (in whatever form) on port 80 HTTP.

Yes, though RMI requires the same.


From lbates at syscononline.com  Fri Feb 25 09:37:48 2005
From: lbates at syscononline.com (Larry Bates)
Date: Fri, 25 Feb 2005 08:37:48 -0600
Subject: web status display for long running program
In-Reply-To: <509534af.0502241737.5f62992@posting.google.com>
References: <509534af.0502241737.5f62992@posting.google.com>
Message-ID: <9uqdnUbE4NyopYLfRVn-vQ@comcast.com>

Not exactly on point, but this is what I use in many of my
programs to show progress on long running console apps.

Larry Bates


class progressbarClass:
    def __init__(self, finalcount, progresschar=None):
        import sys
        self.finalcount=finalcount
        self.blockcount=0
        #
        # See if caller passed me a character to use on the
        # progress bar (like "*").  If not use the block
        # character that makes it look like a real progress
        # bar.
        #
        if not progresschar: self.block=chr(178)
        else:                self.block=progresschar
        #
        # Get pointer to sys.stdout so I can use the write/flush
        # methods to display the progress bar.
        #
        self.f=sys.stdout
        #
        # If the final count is zero, don't start the progress gauge
        #
        if not self.finalcount : return
        self.f.write('\n------------------ % Progress -------------------1\n')
        self.f.write('    1    2    3    4    5    6    7    8    9    0\n')
        self.f.write('----0----0----0----0----0----0----0----0----0----0\n')
        return

    def progress(self, count):
        #
        # Make sure I don't try to go off the end (e.g. >100%)
        #
        count=min(count, self.finalcount)
        #
        # If finalcount is zero, I'm done
        #
        if self.finalcount:
            percentcomplete=int(round(100*count/self.finalcount))
            if percentcomplete < 1: percentcomplete=1
        else:
            percentcomplete=100

        #print "percentcomplete=",percentcomplete
        blockcount=int(percentcomplete/2)
        #print "blockcount=",blockcount
        if blockcount > self.blockcount:
            for i in range(self.blockcount,blockcount):
                self.f.write(self.block)
                self.f.flush()

        if percentcomplete == 100: self.f.write("\n")
        self.blockcount=blockcount
        return

if __name__ == "__main__":
    from time import sleep
    pb=progressbarClass(8,"*")
    count=0
    while count<9:
        count+=1
        pb.progress(count)
        sleep(0.2)

    pb=progressbarClass(100)
    pb.progress(20)
    sleep(0.2)
    pb.progress(47)
    sleep(0.2)
    pb.progress(90)
    sleep(0.2)
    pb.progress(100)
    print "testing 1:"
    pb=progressbarClass(1)
    pb.progress(1)

Brian Roberts wrote:
> I have a command line Python program that sometimes takes a bit
> (several minutes) to run.  I want to provide an optional method for an
> impatient user (me!) to check the status of the program.  The type and
> amount of status information doesn't fit nicely into a --verbose or
> logger -- either too little or too much information at different
> points.
> 
> I think an optional web page would be convenient interface.  The
> Python program would listen on some port, and if queried (by me
> browsing to localhost:12345 for example) would return a pretty status
> display.  Hitting reload would update the status etc.
> 
> My problem is that I'm not sure how to do this:
> - I don't want to embed a full web server into the application or
> require any special PC setup.
> - I think I know how to listen on a socket, but not sure how to send
> stuff to to a web browser -- just start with <HTML>?  Or like a CGI
> script with the header stuff like text/html?  (I don't care if I have
> to write the HTML by hand or can use a toolkit -- not important).
> - Do I need a separate thread to listen and send the HTML?  The
> application is currently single threaded.  I'm confortable with
> threads, but would prefer to avoid them if possible.
> 
> Or is there a better/different way of doing this?  Any general advice
> or pointers to some code that already does this would be very much
> appreciated.
> 
> Python 2.3, under both Linux & Windows if that makes a difference.
> 
> Thanks,
> Brian.


From jhs at oes.co.th  Wed Feb  9 00:48:25 2005
From: jhs at oes.co.th (Jason Smith)
Date: Wed, 09 Feb 2005 12:48:25 +0700
Subject: ANN: Constrict 0.1.0 DNS message parsing library
Message-ID: <1107928105.967.23.camel@sushi>

This message is to announce a new Python module, Constrict, which is
useful for examining DNS messages that you receive either from a network
capture or from a socket.  While other DNS-related Python projects
exist, none provide flexible message parsing and inspection.

  http://www.oes.co.th/projects/Constrict

Constrict is BIND for Python: it is a Python library for parsing DNS
messages using ISC's libbind. Constrict allows you to see DNS messages
in two ways:

      * Direct access to the libbind parsing functions
      * A Python object with various meaningful attributes

This software is available under the GNU General Public License, version
2.

This is the initial release.  Constrict evolved from an internal project
development, so it has already seen much real-world testing.  The
wrapper to the BIND C API is thorough enough for most development, and
the object-oriented view is quite intuitive for day-to-day queries and
responses.

Constrict is known to work with Python 2.3 and BIND 9 on Linux/i386 and
Linux/ppc.

-- 
Jason Smith
Open Enterprise Systems
Bangkok, Thailand
http://www.oes.co.th



From ola.natvig at infosense.no  Thu Feb  3 03:33:51 2005
From: ola.natvig at infosense.no (Ola Natvig)
Date: Thu, 03 Feb 2005 09:33:51 +0100
Subject: new style exception handleing
In-Reply-To: <2LydnVuDKZ32iZzfRVn-qg@powergate.ca>
References: <a677d2-h8g.ln1@pluto.i.infosense.no>
	<2LydnVuDKZ32iZzfRVn-qg@powergate.ca>
Message-ID: <f849d2-8h.ln1@pluto.i.infosense.no>

Peter Hansen wrote:
> Ola Natvig wrote:
> 
>> Does anybody know why it's not possible to raise Exceptions which are 
>> types (new-style-classes). I know all standard exceptions are classic 
>> classes, but if you make a custom exception which both inherits from a 
>> exception class and a new-style one the it causes a type error when 
>> raised.
>>
>>  >>> class b(Exception, object): pass
> 
> 
> This might not help you, but have you considered just making
> your old-style class *contain a reference* to an instance
> of whatever new-style class you want it to contain?  Then
> the issue goes away.
> 
> I can't actually think of a reason to need to base an
> exception on a new-style class, but perhaps you have a
> good one...
> 
> -Peter

It's quite simple to bypass the problem, it was more the reason I was 
wondering about too.

-- 
--------------------------------------
  Ola Natvig <ola.natvig at infosense.no>
  infoSense AS / development


From peter at engcorp.com  Tue Feb 22 08:39:58 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 22 Feb 2005 08:39:58 -0500
Subject: Sequence of empty lists
In-Reply-To: <380obbF5g1lfrU1@individual.net>
References: <ICBCFo.LG3@bath.ac.uk> <380obbF5g1lfrU1@individual.net>
Message-ID: <lI-dnUyWevA6q4bfRVn-hg@powergate.ca>

Diez B. Roggisch wrote:
> seq = [[] for i in xrange(10)]

And the reason you need that approach is given in the FAQ:
http://www.python.org/doc/faq/programming.html#how-do-i-create-a-multidimensional-list

It's a very good idea to read the entire FAQ as soon as you've gotten
past the very basic Python level, so that you can save yourself
and others a lot of time stumbling over the traditional problems
that everyone goes through.  You'll learn a lot of useful things
in the process.

-Peter


From rkern at ucsd.edu  Fri Feb 11 18:22:47 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Fri, 11 Feb 2005 15:22:47 -0800
Subject: Big development in the GUI realm
In-Reply-To: <mailman.2425.1108163801.22381.python-list@python.org>
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>	<mailman.2092.1107797420.22381.python-list@python.org>	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>	<mailman.2095.1107801722.22381.python-list@python.org>	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>	<4207c8db$0$21623$a1866201@visi.com>	<cub12p$pke$1@achot.icm.edu.pl>	<36sip2F56jjmaU1@individual.net>	<umzubw8xg.fsf@vh-s.de>	<420cb65f$0$238$edfadb0f@dread12.news.tele.dk>	<18174288.akFrdXrZLZ@jupiter.g2ctech>
	<mailman.2425.1108163801.22381.python-list@python.org>
Message-ID: <cujeo7$p8f$1@news1.ucsd.edu>

Arich Chanachai wrote:
 > I have never seen a commercial license for a library
> which stated that you did not have to pay the license fee until you have 
> made that much money in sales from the software which you created, in 
> part, from that library.  I would be in favor of such a license, but I 
> haven't seen anything of the sort.

http://www.fastio.com/licensePlain.html

See their license option for shareware developers.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From jack at performancedrivers.com  Sat Feb  5 11:53:56 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Sat, 5 Feb 2005 11:53:56 -0500
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <42044C0C.5080409@iinet.net.au>
References: <dvOMd.33656$EG1.19314@lakeread04>
	<20050204180236.GD1607@performancedrivers.com>
	<42044C0C.5080409@iinet.net.au>
Message-ID: <20050205165356.GJ1607@performancedrivers.com>

On Sat, Feb 05, 2005 at 02:31:08PM +1000, Nick Coghlan wrote:
> Jack Diederich wrote:
> >Since this is 2.4 you could also return a generator expression.
> >
> >
> >>>>def iter_collapse(myList):
> >
> >...   return (x[0] for (x) in 
> >it.groupby([0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5]))
> >... 
> 
> But why write a function that returns a generator expression, when you 
> could just turn the function itself into a generator?
> 
> Py>def iter_collapse(myList):
> ...   for x in it.groupby(myList):
> ...     yield x[0]
> 
Here is where I say, "because it is faster!"
except it isn't.  maybe.  The results are unexpected, anyway.

import timeit
import itertools as it

def collapse1(myl):
  for x in it.groupby(myl):
    yield x[0]

def collapse2(myl):
  return (x[0] for (x) in it.groupby(myl))

list_str = '[0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5]'

print "collapse1", timeit.Timer('collapse1(%s)' % (list_str), 'from __main__ import collapse1').timeit()
print "collapse2", timeit.Timer('collapse2(%s)' % (list_str), 'from __main__ import collapse2').timeit()
print "list(collapse1)", timeit.Timer('list(collapse1(%s))' % (list_str), 'from __main__ import collapse1').timeit()
print "list(collapse2)", timeit.Timer('list(collapse2(%s))' % (list_str), 'from __main__ import collapse2').timeit()

collapse1 1.06855082512
collapse2 3.40627384186
list(collapse1) 8.31489896774
list(collapse2) 9.49903011322

The overhead of creating the generator expression seems much higher than
creating the equivalent function.  If you subtract our the setup difference
actually running through the whole iterator is slightly faster for genexps
than functions that yield.  At a guess it has something to do with how
they handle lexical scope and some byte code differences.

I said guess, right?

-Jack


From ilias at lazaridis.com  Tue Feb 15 10:08:54 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 17:08:54 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <86u0oeiwt3.fsf@guru.mired.org>
References: <cuo71l$gig$1@usenet.otenet.gr> <cup249$svu$1@gemini.csx.cam.ac.uk>
	<cupqb6$1oi$1@usenet.otenet.gr> <86u0oeiwt3.fsf@guru.mired.org>
Message-ID: <cut3a4$dad$1@usenet.otenet.gr>

Mike Meyer wrote:
> Ilias Lazaridis <ilias at lazaridis.com> writes:
> 
>>If it is a programming language, the requirement "using an open-source
>>toolchain" is a rational and valid one.
> 
> It is. However, mingW has nothing to do with "using an open-sourcer
> toolchain".
> 
> Python runs in an environment with a full, open-source tool chain. You
[...] - (twisting context and personal requirements)

sorry, no further comment.

.

-- 
http://lazaridis.com


From blake.garretson at gmail.com  Mon Feb 28 15:11:33 2005
From: blake.garretson at gmail.com (Blake T. Garretson)
Date: 28 Feb 2005 12:11:33 -0800
Subject: Decimal, __radd__, and custom numeric types...
Message-ID: <1109621493.829061.189990@o13g2000cwo.googlegroups.com>

I'm having some issues with decimal.Decimal objects playing nice with
custom data types.  I have my own matrix and rational classes which
implement __add__ and __radd__.  They know what to do with Decimal
objects and react appropriately.

The problem is that they only work with Decimals if the custom type is
on the left (and therefore __add__ gets called), but NOT if the Decimal
is on the left.  The Decimal immediately throws the usual "TypeError:
You can interact Decimal only with int, long or Decimal data types."
without even trying my __radd__ method to see if my custom type can
handle Decimals.

>From the Python docs (specifically sections 3.3.7 and 3.3.8), I thought
that the left object should try its own __add__, and if it doesn't know
what to do, THEN try the right object's __radd__ method.  I guess
Decimal objects don't do this?  Is there a way to change this behavior?
 If Decimal objects prematurely throw a TypeError before trying the
__rop__, is Decimal broken, or was it designed this way?  I think I'm
missing something...

Thanks,
Blake



From kartic.krishnamurthy at gmail.com  Tue Feb  1 14:13:04 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 1 Feb 2005 11:13:04 -0800
Subject: How do you do arrays
In-Reply-To: <1107284817.848551.79000@c13g2000cwb.googlegroups.com>
References: <tbunce-0102051052450001@192.168.1.12>
	<1107284817.848551.79000@c13g2000cwb.googlegroups.com>
Message-ID: <1107285184.141252.104600@c13g2000cwb.googlegroups.com>

and it is called a "List" in Python parlance.



From xah at xahlee.org  Wed Feb 23 03:24:07 2005
From: xah at xahlee.org (Xah Lee)
Date: 23 Feb 2005 00:24:07 -0800
Subject: exercise: partition a list by equivalence
In-Reply-To: <87ekfclprv.fsf@sinken.local.csis.hku.hk>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<87ekfclprv.fsf@sinken.local.csis.hku.hk>
Message-ID: <1109147047.707182.269960@l41g2000cwc.googlegroups.com>

I started to collect i believe the 4 or so solutions by different
people... but seems it's gonna take some an hour or more... So far the
only other one i've run and find alright is Reinhold Birkenfeld's
original. Others worth noting i'm aware of is David Epsteinn, improved
versions from Reinhold Birkenfeld, the one using graphs by bearophile
...

since many of you have already collected and tested these... i wonder
if anyone'd be interested to put together all the (working) code in a
single message? (or even a webpage.)

thanks.

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From vincent at visualtrans.de  Wed Feb  2 15:21:26 2005
From: vincent at visualtrans.de (vincent wehren)
Date: Wed, 02 Feb 2005 21:21:26 +0100
Subject: Printing Filenames with non-Ascii-Characters
In-Reply-To: <36bka5F4vp17cU1@individual.net>
References: <36a3ikF4uk8r0U1@individual.net>
	<ctos5r$t3b$1@news2.tilbu1.nb.home.nl>
	<36bka5F4vp17cU1@individual.net>
Message-ID: <ctrco7$uvs$1@news2.tilbu1.nb.home.nl>

Marian Aldenh?vel wrote:
> 
> But wouldn't that be correct in my case?
> 

This is what I get inside Eclipse using pydev when I run:

<code>
import os
dirname = "c:/test"
print dirname
for fname in os.listdir(dirname):
     print fname
     if os.path.isfile(fname):
         print fname
</code>:

c:/test
stra?enschild.png
test.py
?bersetzung.rtf


This is what I get passing a unicode argument to os.listdir:

<code>
import os
dirname = u"c:/test"
print dirname # will print fine, all ascii subset compatible
for fname in os.listdir(dirname):
     print fname
     if os.path.isfile(fname):
         print fname
</code>

c:/test
Traceback (most recent call last):
   File "C:\Programme\eclipse\workspace\myFirstProject\pythonFile.py", 
line 5, in ?
     print fname
UnicodeEncodeError: 'ascii' codec can't encode character u'\xdf' in 
position 4: ordinal not in range(128)

which is probably what you are getting, right?

You are trying to write *Unicode* objects containing characters outside 
of the 0-128 to a multi byte-oriented output without telling Python the 
appropriate encoding to use. Inside eclipse, Python will always use 
ascii and never guess.

import os
dirname = u"c:/test"
print dirname
for fname in os.listdir(dirname):
     print type(fname)

c:/test
<type 'unicode'>
<type 'unicode'>
<type 'unicode'>



so finally:
<code>
import os
dirname = u"c:/test"
print dirname
for fname in os.listdir(dirname):
     print fname.encode("mbcs")
</code>

gives:

c:/test
stra?enschild.png
test.py
?bersetzung.rtf

Instead of "mbcs", which should be available on all Windows systems, you 
could have used "cp1252" when working on a German locale; inside Eclipse 
even "utf-16-le" would work, underscoring that the way the 'output 
device' handles encodings is decisive. I know this all seems awkward at 
first, but Python's drive towards uncompromising explicitness pays off 
big time when you're dealing with multilingual data.

--
Vincent Wehren






From gmane-schpam at joefrancia.com  Wed Feb 23 03:22:46 2005
From: gmane-schpam at joefrancia.com (Joe Francia)
Date: Wed, 23 Feb 2005 03:22:46 -0500
Subject: a wrapper to invoke functions using argument
In-Reply-To: <1109103502.573234.46650@l41g2000cwc.googlegroups.com>
References: <1109103502.573234.46650@l41g2000cwc.googlegroups.com>
Message-ID: <cvhe9i$eb8$1@sea.gmane.org>

les_ander at yahoo.com wrote:
> Hi,
> support I have a library of function, called mylib.py, in which
> there are 2 functions 'f1' and 'f2' (1 arguments in either one);
> 
> Now I want to write a wrapper that will invoke f1 or f2 using the
> command line argument. So for example, I want to write a function
> "call.py" and invoke it as
> 
> python call.py f1 arg1
> 
> So this is straight forward, but I don't know how to evaluate a
> function.
> any help would be much appreciate it.
> les
> 
There is a FAQ about this:
http://www.python.org/doc/faq/programming.html#how-do-i-use-strings-to-call-functions-methods

-- 
Soraia: http://www.soraia.com



From ilias at lazaridis.com  Mon Feb 14 05:38:23 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Mon, 14 Feb 2005 12:38:23 +0200
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cupsgb$lem$1@gemini.csx.cam.ac.uk>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108370491.792820.142200@z14g2000cwz.googlegroups.com>
	<cuprg2$6rt$1@usenet.otenet.gr> <cupsgb$lem$1@gemini.csx.cam.ac.uk>
Message-ID: <cupv2t$kfs$3@usenet.otenet.gr>

Michael Hoffman wrote:
> Ilias Lazaridis wrote:
> 
>> "The Python Foundation could create an official sub-project to create 
>> an automated build target based on the MinGW toolchain. I am sure that 
>> many community members would be more than happy to contribute."
> 
> An "official sub-project" for something like this is not necessary. 

It is.

I hope the officials from the Python Foundation detect that:

  * source code should be _directly_ compilable under major compilers.
  * community efforts for such a important functionality should be
    channelized and organized

> Identify
> what needs to be done and create a patch, and it will be accepted if it is
> a good patch.

[REQUOTE]
 >> c) Why are the following efforts not _directly_ included in the
 >> python source code base?
 >>
 >> http://jove.prohosting.com/iwave/ipython/pyMinGW.html
[/REQUOTE]

.

-- 
http://lazaridis.com


From almad at include.cz  Mon Feb  7 14:15:45 2005
From: almad at include.cz (Almad)
Date: Mon, 07 Feb 2005 20:15:45 +0100
Subject: Python on WWW - beginners question: what to choose?
References: <cu82v8$2f17$1@news.vol.cz>
	<1107798840.675820.79680@o13g2000cwo.googlegroups.com>
Message-ID: <cu8ep1$2m68$1@news.vol.cz>

Jeff  Reavis wrote:

> Spyce has support for pooling

True, but as covered by this message:
http://sourceforge.net/mailarchive/forum.php?thread_id=6381534&forum_id=10008,
for my purpose, Spyce must run as proxy server. However, when running as
proxy, it seems that I can't (really) run virtual hosts (no "sandboxing" as
specified by me in (1)). This is described by my (unreplied) message:
http://sourceforge.net/mailarchive/forum.php?thread_id=6460778&forum_id=10008
 
> -jjr

-- 

Lukas "Almad" Linhart

[:: http://www.almad.net/ ::]
[:: The stars are constantly shining, but often we do not see them until the
dark hours. ::]
[:: PGP/GNUPg key: http://www.almad.net/download/pubkey.asc ::]


From python at hope.cz  Wed Feb  2 05:35:03 2005
From: python at hope.cz (python at hope.cz)
Date: 2 Feb 2005 02:35:03 -0800
Subject: CONTEST - What is the (best) solution?
Message-ID: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>

In a file there can be several dictionaries like this
{Key11: Value11
Key12: Value12
Key13: Value13,
...
...
Key1n:Value1n}
{Key21: Value21
Key22: Value22
Key23: Value23,
...
...
Key2n:Value2n}
{Key31: Value31
Key32: Value32
Key33: Value33,
...
...
Key3n:Value3n}
....
....
....
{Keyn1: Valuen1
Keyn2: Valuen2
Keyn3: Value3,
...
...
Keynn:Valuenn}

Each pair in a dictionary is separated by CRLF and in each dictionary
numbers of pairs can be different.
I need to read only the the first and the last dictionaries.What is a
best solution?
Thanks
Lad



From PDunce at somewhere.invalid  Mon Feb  7 20:06:11 2005
From: PDunce at somewhere.invalid (Python Dunce)
Date: 08 Feb 2005 01:06:11 GMT
Subject: Dumb glob question
References: <Xns95F6E0341861PDuncesomewhereinval@204.153.244.156>
	<1107770445.983406.64730@g14g2000cwa.googlegroups.com>
Message-ID: <Xns95F6C256797C0PDuncesomewhereinval@204.153.244.156>

"wittempj at hotmail.com" <wittempj at hotmail.com> wrote in comp.lang.python:

> code like below willprint all files ending on 'par2', except tose not
> containong 'vol' from the 5th position. is that what you need?
> -import glob
> -for nuke in glob.glob(r"""c:\temp\*.par2"""):
> -    try:
> -        nuke.index('vol', 5)
> -        print nuke
> -    except ValueError, e:
> -        print e

Not quite.  I'm sorry my example wasn't very clear.  While working with any 
single file I need to be able to build a list of all the other files in a 
particular set.  Basically I just need globbing of the base filename.

glob.glob(basename+'.*some_extension')

So if I was working with 'foo.par2' at the moment...

glob.glob(filename[:-5]+'.*par2')

would catch all of the files belonging to the set including 'foo.par2' 
'foo.vol0+1.par2' 'foo.vol1+1.par2' etc.

This works great (as expected) until you are working with a filename with 
brackets '[]' in it.  Then glob just returns an empty list.  So if I happen 
to be processing 'foo [bar].par2'

glob.glob(filename[:-5]+'.*par2')

doesn't return anything.  Using win32api.FindFiles(filename[:-5]+'.*par2') 
works perfectly, but I don't want to rely on win32api functions.  I hope 
that made more sense :).



From dwelch at vcd.hp.com  Fri Feb 11 14:49:48 2005
From: dwelch at vcd.hp.com (djw)
Date: Fri, 11 Feb 2005 11:49:48 -0800
Subject: PyQt documentation
In-Reply-To: <1108088253.552834.44690@z14g2000cwz.googlegroups.com>
References: <1108088253.552834.44690@z14g2000cwz.googlegroups.com>
Message-ID: <cuj2b4$h9d$1@news.vcd.hp.com>

Eric Jardim wrote:
> Hi,
> 
> Is there any site that gather all the documentation about PyQt?
> 
> The docs of the Riverbank site is poor, and I have found separate
> tutorials on the net.
> 
> I know that the Kompany have made a "Qtdoc"-like to PyQt. But it is not
> free doc.
> 
> Does anybody know anything about any project for making PyQt
> development more easy?
> 
> thanks,
> 
> [Eric Jardim]
> 

If you follow a few simple rules, you can use the C++ Qt docs as-is:

1. Replace ::'s with .'s
2. Replace ->'s with .'s
3. Access to things like .text member variables have to be done with .text()
4. .exec() becomes .exec_loop()
5. Follow the PyQt instructions on how to do signals and slots with 
connect()
6. Convert QStrings with str() from Qt functions/methods if you want to 
work with them with std. Python string functions

I'm sure there's a few more, but those are the main ones. Its actually 
very easy to convert in your head as you go to the proper Pythonic usage 
of Qt.

-Don


From francis.girard at free.fr  Mon Feb 14 15:37:30 2005
From: francis.girard at free.fr (Francis Girard)
Date: Mon, 14 Feb 2005 21:37:30 +0100
Subject: Newbie help
In-Reply-To: <lvUPd.10137$pE1.923@bignews3.bellsouth.net>
References: <lvUPd.10137$pE1.923@bignews3.bellsouth.net>
Message-ID: <200502142137.30476.francis.girard@free.fr>

Mmm. This very much look like a homework from school. Right ?
Francis Girard

Le lundi 14 F?vrier 2005 04:03, Chad Everett a ?crit?:
> Hey guys,
>
> Hope you can help me again with another problem.  I am trying to learn
> Python on my own and need some help with the following.
>
> I am writing a program that lets has the pc pick a number and the user
> has five guess to get the number.
> 1. BUG:  If the number is say 35 and I guess 41 the program tells me
> that I guessed the correct number and tells me I guessed 31.
>
> 2.When I do get the correct number I can not get the program to stop
> asking me for the number.
>
>
> Your help is greatly appreciated.
>
> Chad
>
> # Five Tries to Guess My Number
> #
> # The computer picks a random number between 1 and 100
> # The player gets Five tries to guess it and the computer lets
> # the player know if the guess is too high, too low
> # or right on the money
> #
> # Chad Everett 2/10/2005
>
> import random
>
> print "\tWelcome to 'Guess My Number'!"
> print "\nI'm thinking of a number between 1 and 100."
> print "You Only Have Five Guesses.\n"
>
> # set the initial values
> number = random.randrange(100) + 1
> guess = int(raw_input("Go Ahead and Take a guess: "))
> tries = 1
>
>
> # guessing loop
>
>
> while guess != number:
>
>      if (guess > number):
>          print "Guess Lower..."
>      else:
>          print "Guess Higher..."
>
>      guess = int(raw_input("Take Another guess: "))
>      tries += 1
>
>      print "You guessed it!  The number was", number
>      print "And it only took you", tries, "tries!\n"
>
>      if tries == 5:
>          print "Sorry You Lose!!!!"
>          print "The Number was ", number
>
> raw_input("\n\nPress the enter key to exit.")
>
> THIS IS WHAT THE RESULTS LOOKS LIKE WHEN I RUN THE PROGRAM
>
> Welcome to 'Guess My Number'!
>
> I'm thinking of a number between 1 and 100.
> You Only Have Five Guesses.
>
> Go Ahead and Take a guess: 99
> Guess Lower...
> Take Another guess: 98
> You guessed it!  The number was 85
> And it only took you 2 tries!
>
> Guess Lower...
> Take Another guess: 44
> You guessed it!  The number was 85
> And it only took you 3 tries!
>
> Guess Higher...
> Take Another guess: 55
> You guessed it!  The number was 85
> And it only took you 4 tries!
>
> Guess Higher...
> Take Another guess: 33
> You guessed it!  The number was 85
> And it only took you 5 tries!
>
> Sorry You Lose!!!!
> The Number was  85
> Guess Higher...
> Take Another guess:



From paschott at no.yahoo.spamm.com  Thu Feb 10 17:22:00 2005
From: paschott at no.yahoo.spamm.com (Peter A. Schott)
Date: Thu, 10 Feb 2005 22:22:00 GMT
Subject: ftplib - file.write,
	file.close() - verify finished writing locally before delete source?
Message-ID: <j7nn01dkv6d6b7aigdqsd1u91ihfed8j8p@4ax.com>

If I want to verify that a file has finished writing before deleting the remote
file, what would be the best method?

Current code on Python 2.4:

#filename - remote FTP server File Name
#NewFile - local file copy of the remote file
#objFTP - standard ftplib.FTP object

NewFile = open(os.path.join(InputPath, RemoteFileName), "wb")
objFTP.retrbinary("RETR " + filename, NewFile.write)
NewFile.close()

#Here is my problem - when I call this directly after NewFile.close(), I end up
#with 0-byte local file and successfully delete the remote file.

objFTP.delete(filename)


Any ideas on how to keep the remote file from being deleted if the local file
isn't finished writing?  Any ideas on why I might be retrieving a 0-byte file
locally when I call like this?  If I remove the delete statement, it seems to
work.

TIA,

-Pete Schott


From the.ech0 at gmail.com  Tue Feb  1 06:27:44 2005
From: the.ech0 at gmail.com (ech0)
Date: 1 Feb 2005 03:27:44 -0800
Subject: type of simple object
In-Reply-To: <1107255752.258025.50870@z14g2000cwz.googlegroups.com>
References: <1107255752.258025.50870@z14g2000cwz.googlegroups.com>
Message-ID: <1107257264.146280.89560@c13g2000cwb.googlegroups.com>

use the type function!

>>> s = 'test'
>>> i = 25
>>> type(s)
<type 'str'>
>>> type(i)
<type 'int'>



From deetsNOSPAM at web.de  Mon Feb 28 06:05:02 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 28 Feb 2005 12:05:02 +0100
Subject: Explicit or general importing of namespaces?
References: <1109588238.491145.52060@l41g2000cwc.googlegroups.com>
Message-ID: <38gc2tF5o34sbU1@individual.net>

> Is there really a major performance difference between doing the

No.

> I'm unable to tell a real difference other than in the code writing
> :-).

The difference is that the from-syntax may cause name space pollution. See
the FAQ:

http://www.python.org/doc/faq/programming.html#id12

-- 
Regards,

Diez B. Roggisch


From jerf at jerf.org  Thu Feb  3 14:10:40 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 03 Feb 2005 14:10:40 -0500
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
References: <ctsjmg$75p$1@usenet.otenet.gr>
Message-ID: <pan.2005.02.03.19.10.39.349763@jerf.org>

On Thu, 03 Feb 2005 09:26:08 +0200, Ilias Lazaridis wrote:
> My question is essentially:
> 
> How many of those constructs are already supported by python (and the 
> surrounding open-source-projects):
> 
> http://lazaridis.com/case/stack/index.html

This post is hard to follow, but I'm going to assume this is the core
question, as it is labelled as such.

The first thing that leaps to mind is that you need to play with Python
for a bit to get a full analysis of it. Due to the nature of Python, some
of the things you have in that list don't really apply. 

The most obvious example of this is "code generation": Assuming you mean
what I think you mean, the sort of thing you have in the C++ or Java world
where you click a couple of boxes, push "next" a few times, and have
several hundred kilobytes of impenetrable source code pop out as your
project's "framework", it doesn't generally apply. In Python, you can
actually write frameworks that can be made to do useful things in a small
handful of lines.

For a good example of that, I'd recommend the Twisted tutorial:
http://twistedmatrix.com/documents/current/howto/tutorial/index . In
Python, if a framework makes you write reams of boilerplate... it's
probably because someone just came from Java and isn't thinking in Python
yet. :-) Code generation in Python is generally a non-starter. (Few rare
counterexamples, but it's nothing like the Necessary Crutch it is in the
C++ world.) Generally, every line in that Twisted tutorial, even in the
final program, is *doing something*, not satisfying the framework with
necessary boilerplate.

As for the rest of your requirements, you have specified your "technology
stack" in terms of *goals*, not capabilities, so for quite a lot of them,
there is no answer except, "Yes, Python can do that, and generally easier
than most anything else". For instance, "Use of metadata within the design
(on text level [code file])" can mean a thousand things. For what it's
worth, Python tends to make it so easy I do it all the time, but for any
given way you mean it, I can't promise there exists a pre-rolled framework
for you.

So I can only speak generally. Given your list, you may find that Python
is weak in the "graphical programming" department; drop-and-drop GUI
generation isn't as well-tuned as VB. (I, for one, consider that
development methodology toxic and actively dangerous, but I can understand
why you miss it.)

Skipping down to your evaluation sequence:

* Create a class: Well, I'll show you this one:

class Something: pass

There, a class.

* Simple GUI: You may wish to check out Boa Constructor, as the closest
thing to the GUI generator you probably want. There are at least 3 major
viable GUI toolkits for Python and several other minor (but still capable)
ones.

* Embedded DBs: I don't know, Google for your embedded DB name + Python.
Failing that, there are several ways to wrap your embedded DB such that a
Python program can use it.

* Web GUI: There are more Python web frameworks than you can shake a stick
at, and I don't mean "some guys hacked together templating system" either;
there are a lot of very mature systems out there, expressing a lot of
different philosophies. Given some of your other requirements, for a
web-based application I'd recommend examining Zope.

* Deployment: I don't generally have enough problems with this to be worth
thinking about. I don't know what the state of the remote debugging is on
Python; Google "remote debugging Python".

* For your "complex updates", I see two distinct things there; half of the
depend on the database, not Python. For the other half, it depends on if
you mean "while the program is still running". If so, they are
challenging. If not, they are trivial.

* I'd recommend adding "testability" to your stack, and refer you to the
"unittest" module; others can suggest their preferred testing modules, but
I tend to stick with that as the general framework is available in a lot
of languages that I use. If by evolutive development you are including the
ideas behind "agile software development" (hard to tell if you mean that,
or a community open to change*)

Based on what I see here, I have two basic comments. First, yes, Python is
probably as close as you are going to get in an existing system to what I
think you are looking for. It isn't perfect, but you will also be able to
reasonably extend it for your needs. Second, Python has a different
philosophy; you recognize the need for a different philosophy and I
extremely strongly suggest that you take the time with Python to sort out
what you truly need from what you think you need due to still thinking
with your old philosophy. (For example, given my aforementioned
reasons why code generation isn't an issue in Python, I strongly suggest
you embrace Python and give it a chance, rather than force 'code
generation' on top of it.)

You've got some exciting learning to do, and some interesting philosophy
shifts to absorb, but I think you'll find, as a lot of use have, that even
if it isn't perfect it's a helluva lot better than Java!

*: Community open to change: One caveat, from what I've seen when other
people talk about this. The Python community is open to change, but it is
still a meritocracy, and you will still need to convince others your
change is good. For example, getting something into the standard library
is not something that everybody does routinely. But as it is open source,
if you want to take responsibility for your changes, you can do as you
like. I *think*, based on your reading, that you are focussing on the
latter, in which case you are OK. But do not expect to be able to dump
things off onto "the Python community". 

Also, not getting into the standard library isn't that big a deal anyhow;
a lot of very powerful and popular frameworks and modules don't go in,
often because they conflict with the needs of a Python release (slow rate
of change, mature interface, general utility, need to prevent a Python
download ballooning to 250 MB, etc.). 


From caleb1 at telkomsa.net  Sun Feb  6 22:47:04 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Sun, 06 Feb 2005 22:47:04 -0500
Subject: loops -> list/generator comprehensions
References: <1107718117.221204.80410@l41g2000cwc.googlegroups.com>
Message-ID: <opsls54qat1js0xs@news.telkomsa.net>

I would be interested to see an example of code that is more concise but  
yet as *clear* as the one you already have.  I can actually read and  
understand what you've got there.   That's cool :)


On 6 Feb 2005 11:28:37 -0800, <jamesthiele.usenet at gmail.com> wrote:

> I wrote this little piece of code to get a list of relative paths of
> all files in or below the current directory (*NIX):
>
>     walkList  = [(x[0], x[2]) for x in os.walk(".")]
>     filenames = []
>     for dir, files in walkList:
>         filenames.extend(["/".join([dir, f]) for f in files])
>
> It works fine, I don't need to change it, but I know there is a one
> liner list/generator comprehension to do this - I'm just not well
> enough versed in comprehensions to figure it out. Can someone please
> show me what it is?
>
> Even better, is there a generalized way to transform simple loops into
> comprehensions that someone can point me to?
>
> james
>



From mahs at telcopartners.com  Sat Feb 12 18:03:42 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sat, 12 Feb 2005 15:03:42 -0800
Subject: check if object is number
In-Reply-To: <mLKdnbj4O4gQH5DfRVn-iA@comcast.com>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>	<374t0mF4te5vbU1@individual.net>	<7tOdnYs6NtrV7JDfRVn-vQ@powergate.ca>
	<mLKdnbj4O4gQH5DfRVn-iA@comcast.com>
Message-ID: <cum1r6$dou$1@sea.gmane.org>

Steven Bethard wrote:
> Peter Hansen wrote:
> 
>> Of course, most of the other definitions of "is a number" that
>> have been posted may likewise fail (defined as not doing what the
>> OP would have wanted, in this case) with a numarray arange.
>> Or maybe not.  (Pretty much all of them will call an arange a
>> number... would the OP's function work properly with that?)
> 
> 
> No, but it will fail properly since my code basically looks like:
> 
> def f(max=None):
>     ...
>     while max is None or n <= max:
>         ...
>         # complicated incrementing of n
> 
> So if max is an array, though all of the proposed isnumber checks will 
> call it a number, my code will (rightly) fail when the array (n <= max) 
> gets __nonzero__ called in the while condition.  I guess I'd prefer it 
> to fail in the isnumber check, but overall, I'm more concerned that 
> _some_ error is produced, not necessarily which one.  (I'm also not 
> thrilled that bool(array) raises a RuntimeError instead of a TypeError...)
> 
> Steve
Steve,

How about explicitly calling an adapter in your function, e.g.?

 > def f(max=None):
 >     max = number(max)
 >     while max is None or n <= max:
 >         ...
 >         # complicated incrementing of n

then you can define number to document the required behavior and return more 
useful exceptions if the object fails.  At the same time, anyone who wants to 
use a custom number class with your function has a ready-made unittest.

  >>> def number(obj):
  ...     """Adapts obj to be numeric, or fails helpfully"""
  ...     if isinstance(obj, (int, float, long, )): # these types conform
  ...        return obj
  ...     elif isinstance(obj, basestring): # these types have a known adaptation
  ...        return int(obj)
  ...     else: # check the object exhibits the required behavior
  ...        try:
  ...            assert obj+1 >= 1
  ...        except Exception, err:
  ...            raise TypeError, "obj does not support addition and comparisons 
with numbers (%s)" % err
  ...        return obj
  ...
  >>> class MyNumber(object):
  ...     def __init__(self, data):
  ...        self.data = data
  ...     def __add__(self, other):
  ...        return MyNumber(self.data + other)
  ...     def __cmp__(self, other):
  ...        return self.data.__cmp__(other)
  ...
  >>> a = MyNumber(42)
  >>> a is number(a)
True
  >>>
  >>> number(1+2j)
Traceback (most recent call last):
   File "<input>", line 1, in ?
   File "<input>", line 11, in number
TypeError: obj does not support addition and comparisons with numbers (cannot 
compare complex numbers using <, <=, >, >=)
  >>> number(array.array("i",[1]))
Traceback (most recent call last):
   File "<input>", line 1, in ?
   File "<input>", line 11, in number
TypeError: obj does not support addition and comparisons with numbers (can only 
append array (not "int") to array)
  >>>

Cheers
Michael



From SSchukat at dspace.de  Thu Feb 17 04:22:31 2005
From: SSchukat at dspace.de (Stefan Schukat)
Date: Thu, 17 Feb 2005 10:22:31 +0100
Subject: keeping a COM server alive
Message-ID: <B4EFCCAD2646F6449166007B3EAA5EC303462E@exchange2003.dspace.de>

Hi, 

there is no real solution if you are using a standard local server.
The server is as a COM object reference counted. So if the
reference count reaches 0 (no client) it will shutdown itself which
is done by design. If you want a different behavior you should write
either a service which exports COM objects and is started by the
operating system or a Python script which you start by hand, 
registers the class factories and then does not shut down.

	Stefan

> -----Original Message-----
> From: python-list-bounces+sschukat=dspace.de at python.org
> [mailto:python-list-bounces+sschukat=dspace.de at python.org]On Behalf Of
> xeoicq at netscape.net
> Sent: Monday, February 14, 2005 12:53 PM
> To: python-list at python.org
> Subject: keeping a COM server alive
> 
> 
> I have implemented a local COM Server with win32com framework 
> where all
> clients
> use the same global object (test_obj). So far it works, but when the
> last client
> is closed the gobal object is deleted because the pythonw.exe is
> closed. When I
> create a new client a new pythonw process is started. I need that the
> new client
> gets the same global object. How can I prevent the Python COM
> enviornment
> (pythonw.exe) to close when no client exist. I figured out a
> workaround, but
> there must be real solution to the problem.
> 
> 
> 
> The code looks like:
> 
> class test:
>     ...
> 
> test_obj=test()
> 
> 
> class test_F:
> 
>     _reg_clsid_ = ...
>     _reg_progid_ = "test.cl"
>     _reg_clsctx_ = pythoncom.CLSCTX_LOCAL_SERVER
>     _public_methods_ = ...
> 
> 
>     def __init__(self):
>         self.delegate=test_obj
>         ....
>     ...
> 
> 
> ####Workaround to keep the local server alive
> if not __name__=='__main__':
>     import win32com.client
>     dummy=win32com.client.Dispatch("test.cl")
> ##########################################################
> 
> 
> if __name__=='__main__':
>     import win32com.server.register
>     win32com.server.register.UseCommandLine(test_F, debug=0)
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 


From steven.bethard at gmail.com  Thu Feb  3 01:55:05 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 02 Feb 2005 23:55:05 -0700
Subject: Two classes problem
In-Reply-To: <mailman.1795.1107409780.22381.python-list@python.org>
References: <mailman.1768.1107369788.22381.python-list@python.org>	<opsllpombg1js0xs@news.telkomsa.net>
	<mailman.1795.1107409780.22381.python-list@python.org>
Message-ID: <-9qdna9r6d1VV5zfRVn-oA@comcast.com>

Gurpreet Sachdeva wrote:
> The purpose is, I pass a list to a class in a module but I want to use
> that list out of the scope of that class and that too not in any other
> class or a function but in the main program...
> The problem is that when I import that, the statements in the module
> which are not in the class are executed first and then the variable
> gets intiallised...
> I will explain with the example...
> 
> -global test
> -
> -class a:
> -        def __init__(self,test):
> -                global test
> -                print test
> -
> -print 'Outside: '+test
> 
> I want to print that variable test which I am giving to the class as
> an argument, in the scope of main...
> I know it is not a good way of programming but my situation is like this...
> But is this possible or not? If I pass test as 'Garry' can I (by any
> way) print 'Outside: Garry' with that print statement... (in the main
> scope)

Probably a better approach for this would be something like:

     class A(object):
         def __init__(self, test):
             self.test = test
         def printtest(self):
             print 'Outside: %s' % self.test

where your code in your main module looks something like:

     import amodule
     a = amodule.A('Garry')
     a.printtest()

The __init__ method is used for initializing *instances* of a class, so 
using the __init__ method to initialize a module-level variable doesn't 
really make much sense.  If you really want to play around with 
module-level variables, you probably want to modify them with 
module-level functions, e.g.:

     test = 'default'
     def a(val):
         global test
         test = val
     def printtest():
         print 'Outside: %s' % test

where your code in your main module looks something like:

     import amodule
     amodule.a('Garry')
     amodule.printtest()

Note that I've moved all your code that would normally be executed at 
module import time into the 'printtest' function.  This way you can 
execute this code after import.

If you really need to have the code executed at the same time as the 
module is imported, another option would be to exec your code in an 
empty module instead of importing it:

     py> a_module_str = """print 'Outside: %s' % test"""
     py> a_module = new.module('a')
     py> a_module.test = 'Garry'
     py> exec a_module_str in a_module.__dict__
     Outside: Garry

Here I create an empty module, set its 'test' attribute to 'Garry', and 
then execute the rest of your code (e.g. the print statement).  This is 
certainly my least favorite approach, but it seems to do the closest 
thing to what you're asking for.

Steve


From pf_moore at yahoo.co.uk  Fri Feb 25 15:19:40 2005
From: pf_moore at yahoo.co.uk (Paul Moore)
Date: Fri, 25 Feb 2005 20:19:40 +0000
Subject: [perl-python] generic equivalence partition
References: <1109245733.261643.219420@f14g2000cwb.googlegroups.com>
	<eppstein-CDFABC.20594724022005@news.service.uci.edu>
Message-ID: <uwtsw8k9v.fsf@yahoo.co.uk>

David Eppstein <eppstein at ics.uci.edu> writes:

> In article <1109245733.261643.219420 at f14g2000cwb.googlegroups.com>,
>  "Xah Lee" <xah at xahlee.org> wrote:
>
>> parti(aList, equalFunc)
>> 
>> given a list aList of n elements, we want to return a list that is a
>> range of numbers from 1 to n, partition by the predicate function of
>> equivalence equalFunc. (a predicate function is a function that
>> takes two arguments, and returns either True or False.)
>
> In Python it is much more natural to use ranges from 0 to n-1.
> In the worst case, this is going to have to take quadratic time 
> (consider an equalFunc that always returns false) so we might as well do 
> something really simple rather than trying to be clever.

As you say, with the spec as it stands, you can't do better than
quadratic time (although it's O(n*m) where m is the number of
partitions, rather than O(n^2)).

You can do a lot better if you can use a "key" function, rather than
an "equivalence" function, much as list.sort has a "key" argument, and
itertools.groupby (which is pretty close in function to this
partitioning problem) uses a key argument.

In fact, I'd have difficulty thinking of an example where I'd want a
partition function as specified, in Python. In Perl, it makes a lot of
sense, as Perl's array indexing operations lend themselves to slinging
round lists of indices like this. But in Python, I'd be far more
likely to use list.sort followed by itertools.groupby - sort is stable
(so doesn't alter the relative order within equivalence classes), and
groupby then picks out the equivalence classes:

>>> elements = [['x', 'x', 'x', '1'],
...             ['x', 'x', 'x', '2'],
...             ['x', 'x', 'x', '2'],
...             ['x', 'x', 'x', '2'],
...             ['x', 'x', 'x', '3'],
...             ['x', 'x', 'x', '4'],
...             ['x', 'x', 'x', '5'],
...             ['x', 'x', 'x', '5']]

>>> # No need to sort here, as the elements are already sorted!

>>> from pprint import pprint
>>> pprint([(k, list(v)) for k, v in groupby(elements, itemgetter(3))])
[('1', [['x', 'x', 'x', '1']]),
 ('2', [['x', 'x', 'x', '2'], ['x', 'x', 'x', '2'], ['x', 'x', 'x', '2']]),
 ('3', [['x', 'x', 'x', '3']]),
 ('4', [['x', 'x', 'x', '4']]),
 ('5', [['x', 'x', 'x', '5'], ['x', 'x', 'x', '5']])]

If you avoid the sort, the whole thing is highly memory efficient, as
well, because by using iterators, we don't ever take a copy of the
original list.

Having cleverly redefined the question so that it fits the answer I
wanted to give, I'll shut up now :-)

Paul.
-- 
To attain knowledge, add things every day; to attain wisdom, remove
things every day. -- Lao-Tse


From benjamin.cordes at blawrc.de  Sun Feb 20 16:32:28 2005
From: benjamin.cordes at blawrc.de (benjamin.cordes at blawrc.de)
Date: 20 Feb 2005 13:32:28 -0800
Subject: [long] nested lists as arrays
In-Reply-To: <42114db9$0$6837$626a14ce@news.free.fr>
References: <1108384089.804375.179130@f14g2000cwb.googlegroups.com>
	<42109efc$0$23451$626a14ce@news.free.fr>
	<1108402043.941832.34110@f14g2000cwb.googlegroups.com>
	<42114db9$0$6837$626a14ce@news.free.fr>
Message-ID: <1108935148.931728.9430@o13g2000cwo.googlegroups.com>

great thanks



From m at m.com  Tue Feb  8 14:18:54 2005
From: m at m.com (m)
Date: Tue, 08 Feb 2005 13:18:54 -0600
Subject: Python versus Perl ?
In-Reply-To: <mailman.2207.1107888646.22381.python-list@python.org>
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com><hkhc01dnpmmhn980quijqil40653qipdki@4ax.com>	<cuavn1$bag$1@nntp.msstate.edu>
	<mailman.2207.1107888646.22381.python-list@python.org>
Message-ID: <cub3av$dso$1@nntp.msstate.edu>

Fredrik Lundh wrote:

> if you use Python mostly to write empty loops, your programming license
> should be revoked.  the benchmark author seems to have realized that, as
> can be seen from the "it's dead" paragraph at the top of the page, which
> makes me wonder why you posted this link...
> 
> </F> 

i was trying to decide whether i needed perl or python for some work 
that i had to get done and was seeing which was faster. and came across 
this link which i tht was pertinent. is python as fast as perl for the 
nonempty loops that the author wrote?


From abpillai at gmail.com  Tue Feb  1 07:43:11 2005
From: abpillai at gmail.com (Anand)
Date: 1 Feb 2005 04:43:11 -0800
Subject: Remove HTML tags (except anchor tag) from a string using
	regular expressions
In-Reply-To: <mailman.1687.1107259469.22381.python-list@python.org>
References: <mailman.1687.1107259469.22381.python-list@python.org>
Message-ID: <1107261791.167726.53110@c13g2000cwb.googlegroups.com>

How about...

import re
content = re.sub('<([^!(a>)]([^(/a>)]|\n)*)>', '', content)
Seems to work for me.

HTH

-Anand



From newsgroups at jhrothjr.com  Wed Feb  2 18:17:40 2005
From: newsgroups at jhrothjr.com (John Roth)
Date: Wed, 2 Feb 2005 17:17:40 -0600
Subject: Integrated Testing - Peppable?
References: <1107373949.960435.212020@z14g2000cwz.googlegroups.com>
Message-ID: <1102ntulmp5sud3@news.supernews.com>

<carl.manaster at gmail.com> wrote in message 
news:1107373949.960435.212020 at z14g2000cwz.googlegroups.com...
> Hi,
>
> Please excuse the intrusion from an admirer, but not a user, of Python.
>
> I've got an idea that I think could improve the language and might be
> relatively simple to implement.  I've developed a prototype with a toy
> language here: <https://sourceforge.net/projects/zbt/>, with screenshot
> here: <https://sourceforge.net/project/screenshots.php?group_id=130278>
>
> The idea is that if the language had testing built into it, editors
> could take advantage of that to highlight, not by syntax, but by
> correctness (as defined by the tests).  As a side effect, coverage
> coloring is also possible.
>
> So far, I see the need for three keywords: "expect", "returns", and
> "archetype".  "expect" and "returns" get used together, as an
> expression of what the function should return, given certain inputs.
> "archetype" would define edit-type instantiable objects that could be
> used in the tests.  The biggest lack at present is support for void
> functions.
>
> So...  Should I turn this into a PEP?

I'd say no, for a couple of reasons. One is that there
are Eclipse plugins that do this for JUnit; they don't
require any changes to Java in order to function. They
just require JUnit, which is pretty ubuquitous.

Second, is that the IDEs aren't part of Python proper.

Outside of that, it's might be quite a good idea to
do something similar with unittest, doctest or py.test.

John Roth

>
> Peace,
> --Carl
> 



From fredrik at pythonware.com  Wed Feb 23 04:55:05 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 23 Feb 2005 10:55:05 +0100
Subject: [Python-Dev] RE: Nested scopes resolution -- you can breathe again!
References: <XFMail.010223104112.mikael@isy.liu.se>
Message-ID: <01c301c5198d$c6bcc3f0$0900a8c0@SPIFF>

Mikael Olofsson wrote:
> There really is a time machine. So I guess I can get the full Python 3k
> functionality by doing
> 
> from __future__ import *

I wouldn't do that: it imports both "warnings_are_errors" and
"from_import_star_is_evil", and we've found that it's impossible
to catch ParadoxErrors in a platform independent way.

Cheers /F




From roy at panix.com  Wed Feb  9 08:56:57 2005
From: roy at panix.com (Roy Smith)
Date: Wed, 09 Feb 2005 08:56:57 -0500
Subject: Is Python as capable as Perl for sysadmin work?
References: <pan.2005.02.08.04.01.16.605059@yahooz.com>
	<mailman.2204.1107885796.22381.python-list@python.org>
	<4209b8a4$0$223$edfadb0f@dread12.news.tele.dk>
Message-ID: <roy-F580D1.08565709022005@reader2.panix.com>

In article <4209b8a4$0$223$edfadb0f at dread12.news.tele.dk>,
 Max M <maxm at mxm.dk> wrote:

> Jeff Epler wrote:
> > No.
> > 
> > Unlike Perl, Python implements only a *finite turning machine* model of
> > computation.  An easy way to see this limitation is in the following
> > code:
> >     >>> 1.0 / 10.0
> >     0.10000000000000001
> > In an infinite Turning machine, there would be an unbounded number of
> > zeros before the second 1, giving the exact result, not a numeric
> > approximation.
> 
> Another thing is that in Perl it turns left, while in Python it turns 
> right. hence the .rfind() string method.
> 
> 
> > Well, if you ever
> > have to threaten Python, just keep in mind that '... or die' just plain
> > won't work.  You have to suggest that it 'try ... except', which is
> > really offensive.  If I want to beg my computer to run programs, I know
> > where to find Intercal with its "PLEASE" and "DO PLEASE" constructions.
> 
> Wasn't there talk about a "try harder" recently?
> 
> try:
>      statement
> tryharder:
>      statement

How about the Yoda version:

do:
   statement
do not do:
   statement


From davidschein at alumni.tufts.edu  Wed Feb 16 16:01:18 2005
From: davidschein at alumni.tufts.edu (David S.)
Date: Wed, 16 Feb 2005 21:01:18 +0000 (UTC)
Subject: huge help for interactive python
References: <loom.20050216T213315-348@post.gmane.org>
Message-ID: <loom.20050216T220041-910@post.gmane.org>

David S. <davidschein <at> alumni.tufts.edu> writes:


> I am sure it can be improved, but it was easy.  By the 
> way, it generates LaTeK.

LaTeX, rather.



From wilberforce at gmail.com  Wed Feb 16 22:56:33 2005
From: wilberforce at gmail.com (xtian)
Date: 16 Feb 2005 19:56:33 -0800
Subject: Multiple initialization methods?
References: <1108589491.301007.174370@z14g2000cwz.googlegroups.com>
Message-ID: <1108612593.903848.48280@z14g2000cwz.googlegroups.com>

Several people have told you about dispatching to the different methods
based on the different parameters. Another technique is to have the
different initialisation methods be static or class methods. For
example, the python dictionary type can be instantiated in a variety of
ways:

dict(a=1, b=2, c=3) -> {'a': 1, 'c': 3, 'b': 2}

dict([('a',1), ('b',2), ('c',3)])  -> {'a': 1, 'c': 3, 'b': 2}

These are examples of dispatching to different initialisers based on
the passed parameters, but there's also the fromkeys() class method,
which accepts a list of keys and will return a new dictionary with the
elements of the list as keys:

dict.fromkeys(['a','b','c']) -> {'a': None, 'c': None, 'b': None}

This could be implemented as follows:

class dict(object):
.   def __init__(self, *args, **kws):
.       # standard initialisation...
.
.   def fromkeys(cls, keys):
.       # transform the list of keys into a list of (key, value) pairs,
.       # then delegate to the standard initialiser
.       return cls([(k, None) for k in keys])
.       # or:
.       result = cls()
.       for k in keys:
.           result[k] = None
.       return result
.   fromkeys = classmethod(fromkeys)

(In 2.4, this could use decorators and generator comprehensions
instead.)

I often use this (even in languages like Java which support
overloading) when instantiating domain objects that might be retrieved
in many different ways, for example getting an instance of a user by
database id or by login details:

u = User.getById(1234)
u = User.getByLogin(username, password)

Cheers,
xtian



From raver2046 at gmail.com  Thu Feb 17 18:41:04 2005
From: raver2046 at gmail.com (raver2046)
Date: Fri, 18 Feb 2005 00:41:04 +0100
Subject: global var
Message-ID: <42152b84$0$15817$636a15ce@news.free.fr>

hello,

How to have a global var in python ?

thank you.

raver2046
http://raver2046.ath.cx




From administrata at hotmail.com  Fri Feb 11 04:54:05 2005
From: administrata at hotmail.com (administrata)
Date: 11 Feb 2005 01:54:05 -0800
Subject: [N00B] What's %?
References: <614c778e.0502100938.6665cb52@posting.google.com>
Message-ID: <614c778e.0502110154.4d53d97a@posting.google.com>

administrata at hotmail.com (administrata) wrote in message news:<614c778e.0502100938.6665cb52 at posting.google.com>...
> Hi! it's been about a week learning python!
> I've read 'python programming for the absolute begginer'
> I don't understand about % like...
> 
> 107 % 4 = 3
> 7 % 3 = 1
> 
> I'm confused with division :/
> Please help me...
> 
> thx 4 reading.

sry, i don't know much about maths

What is % used for?

such as?


From timr at probo.com  Tue Feb  1 00:50:44 2005
From: timr at probo.com (Tim Roberts)
Date: Mon, 31 Jan 2005 21:50:44 -0800
Subject: tkinter: Can You Underline More Than 1 Char In A Menu Title
References: <d00nc2-ctm.ln1@eskimo.tundraware.com>
Message-ID: <056uv054s4ionvjt2ii8fcnm3hvcqqm8g2@4ax.com>

Tim Daneliuk <tundra at tundraware.com> wrote:
>
>I am currently underling the first character of a menu title (to indicate
>its shortcut/accelerator key) like this:
>
>    self.WildBtn = Menubutton(self.mBar, text=WILDMENU, underline=0, state=DISABLED)
>
>However, I intend to actually have two separate keys invoke this menu
>to have it behave differently in different circumstances.

You can, of course, CHANGE the underlined character to match the
circumstances.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From nemesis at nowhere.invalid  Thu Feb  3 15:26:39 2005
From: nemesis at nowhere.invalid (Nemesis)
Date: Thu, 03 Feb 2005 20:26:39 GMT
Subject: Finding user's home dir
References: <5i9rtc.rq31.ln@orion.homeinvalid>
	<mailman.1800.1107419518.22381.python-list@python.org>
	<GcKdnaOlaN41tJ_fRVn-rg@powergate.ca>
Message-ID: <s1pttc.1q12.ln@orion.homeinvalid>

Mentre io pensavo ad una intro simpatica "Peter Hansen" scriveva:

> Miki Tebeka wrote:
>>>Hi all, I'm trying to write a multiplatform function that tries to
>>>return the actual user home directory.
>>>...
>> 
>> What's wrong with:
>>     from user import home
>> which does about what your code does.
>
> :-)
>
> I suspect he simply didn't know about it.  I didn't either...

That's true :-D
But as I said in the other post os.environ["HOME"] doesn't work on my
Win2000 box.

> Nemesis, please use the above recipe instead, as it makes
> the more reasonable (IMHO) choice of checking for a HOME
> environment variable before trying the expanduser("~")
> approach.  This covers folks like me who, though stuck
> using Windows, despise the ridiculous Microsoft convention
> of "user folders" named like "C:\Documents and Settings\Peter"
> and prefer to create sensible folder like c:\users\peter
> and set a HOME variable to point to it.  Your approach
> ignores our HOME variable.

If you look at ntpath.py (I think this is the 'path' module on
Windows 2000) in you Lib dir you'll see that expanduser does try
os.environ["HOME"]
So I'm not ignoring it, maybe it is redundant in my function.
The problem is that expanduser and user.home doesn't test if the value
returned is really a directory.

> c:\>python
> Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on win32
>  >>> from user import home
>  >>> print home
> c:\users\peter
>
> Yay! :-)

on my box it returns "%USERPROFILE%" ;-)

-- 
Forgive your enemies, but never forget their names.
 
 |\ |       |HomePage   : http://nem01.altervista.org
 | \|emesis |XPN (my nr): http://xpn.altervista.org



From snacktime at gmail.com  Wed Feb  9 14:38:27 2005
From: snacktime at gmail.com (snacktime)
Date: Wed, 9 Feb 2005 11:38:27 -0800
Subject: Freebsd thread/signal problem
Message-ID: <1f060c4c05020911385282d281@mail.gmail.com>

I have a client/server application written in python/twisted and on
freebsd the server won't shut down correctly with SIGINT or SIGTERM,
instead requiring a SIGKILL.  The twist is that if I send the server a
signal, it will shut down on the next request from the client.  In
that case it shuts down immediately when the client connects and
closes the connection before it's fully established.

The server will also shut down correctly if it hasn't yet accepted any
connections from a client.

 This is on freebsd 5.3-release-p2 with python 2.4 and twisted both
installed from ports.  I tested it on Debian (sarge) and the signals
work fine.

It's like there is some sort of event loop that isn't working
correctly.  Freebsd is obviously getting the signal, but it doesn't
act on it until another request comes in from the client.

Below is some simple code that will run if you have twisted.  Sorry I
don't have a more simple test case, but I'm fairly new to python (and
threads), and writing something from scratch would take a while.

Server (save server to test.tac and start with twistd -noy test.tac)
---------------------------------------------------
from twisted.application import service,internet
from twisted.internet.protocol import Protocol, Factory
from twisted.internet import defer, reactor
from twisted.python import threadable
from twisted.internet import threads
from twisted.python import log
threadable.init(1)
import sys

class ProcessTransaction:

  def Do(self,data):
      return 'Done'


### Protocol Implementation

class OT(Protocol):
    def dataReceived(self, data):
      """As soon as any data is received, process it in a thread."""
      reactor.callLater(0, self.Start,data)

    def PrintData(self,data):
      self.transport.write("%s\r\n" % data)
      self.transport.loseConnection()

    def Start(self,data):
      c = ProcessTransaction()
      d = threads.deferToThread(c.Do,data)
      d.addCallback(self.PrintData)
      d.addErrback(log.err)


application = service.Application("otransact")
OTService = service.IServiceCollection(application)
OTfactory = Factory()
OTfactory.protocol = OT
OTServer = internet.TCPServer(8000, OTfactory)
OTServer.setServiceParent(OTService)



Client (just run as python test.py)
--------------------------------------------------------------
import sys
import time

from twisted.internet.protocol import ClientFactory
from twisted.protocols.basic import LineReceiver
from twisted.internet import reactor

class EchoClient(LineReceiver):
    end="GoodBye"
    def connectionMade(self):
        self.sendLine("Testing")

    def connectionLost(self, reason):
        print 'connection lost (protocol)'
        reactor.stop()

    def lineReceived(self, line):
        print "receive:", line
        self.transport.loseConnection()

class EchoClientFactory(ClientFactory):
    protocol = EchoClient

    def clientConnectionFailed(self, connector, reason):
        print 'connection failed:', reason.getErrorMessage()
        reactor.stop()

    def clientConnectionLost(self, connector, reason):
        print 'connection lost:', reason.getErrorMessage()
        reactor.stop()


def main():
    factory = EchoClientFactory()
    reactor.connectTCP('localhost', 8000, factory)
    reactor.run()


if __name__ == '__main__':
    main()


From alecw at pobox.com  Wed Feb  9 10:06:27 2005
From: alecw at pobox.com (Alec Wysoker)
Date: Wed, 09 Feb 2005 10:06:27 -0500
Subject: Finding user's home dir
Message-ID: <6.1.2.0.0.20050209095758.0254b1a8@mail.comcast.net>

Could you explain a little more clearly what the problem is?  In the implementation of expanduser in Python 2.3.4, it uses the value of HOME env var if it exists, otherwise, it uses HOMEDRIVE + HOMEPATH.  I don't have access to a Win 2K machine right now, but my recollection is that when I did, HOMEDRIVE and HOMEPATH were set by Windows, so the right thing should happen.

Do you not have HOMEDRIVE + HOMEPATH set in your environment, e.g. if you open a CMD.exe window?

When you say that it returned %USERPROFILE%, do you mean that it returned that actual string, or the value of that env var?  

Or is it that you want it to return the path to your My Documents directory, which is not necessarily the same thing as %HOME%?

Thanks, Alec

> Hi all, I'm trying to write a multiplatform function that tries to
> return the actual user home directory. I saw that
> os.path.expanduser("~") works on Linux but on Windows2000 (at least on
> the win I used) it returns %USERPROFILE%, so I tried os.environ["HOME"]
> and it gave me the same results. So I ended up with
> os.environ["USERPROFILE"], it doesn't work on Linux but (at least) on
> Windows2000 it returns the correct information
> 
> I googled a little bit and it seems that there is no general solution,
> so I tried to merge what I found, and I wrote this little function:
> 
> def getHomeDir():
>     ''' Try to find user's home directory, otherwise return current directory.'''
>     try:
>         path1=os.path.expanduser("~")
>     except:
>         path1=""
>     try:
>         path2=os.environ["HOME"]
>     except:
>         path2=""
>     try:
>         path3=os.environ["USERPROFILE"]
>     except:
>         path3=""
> 
>     if not os.path.exists(path1):
>         if not os.path.exists(path2):
>             if not os.path.exists(path3):
>                 return os.getcwd()
>             else: return path3
>         else: return path2
>     else: return path1




From qwweeeit at yahoo.it  Sat Feb 26 18:08:59 2005
From: qwweeeit at yahoo.it (qwweeeit)
Date: 26 Feb 2005 15:08:59 -0800
Subject: remove strings from source
References: <2ab23d7a.0502260638.311cc5e9@posting.google.com>
	<mailman.3091.1109433365.22381.python-list@python.org>
Message-ID: <2ab23d7a.0502261508.5bf50b49@posting.google.com>

Thank you for your suggestion, but it is too complicated for me...
I decided to proceed in steps:
1. Take away all commented lines
2. Rebuild the multi-lines as single lines

I have already written the code and now I can face the problem of
mouving string definitions into a data base file...
Hopefully I will then build cross reference tables of the variables.
My project is also to implement the code for building functions' tree
.


From newsgroups at louisianablogs.org  Mon Feb 14 19:22:13 2005
From: newsgroups at louisianablogs.org (Charles Stricklin)
Date: Mon, 14 Feb 2005 18:22:13 -0600
Subject: How can I tell if my host supports Python?
Message-ID: <NcbQd.1350$3b7.1098@bignews3.bellsouth.net>

I'd like to use Planet (http://planetplanet.org/) to aggregate my members
blogs into one big blog, and my host (http://www.bodhost.com) says they
support Python, but I see nothing anywhere on their web site including my
control panel that leads me to believe they do.

Is there any way to determine if they do?
-- 
Charles Stricklin




From mefjr75 at hotmail.com  Sun Feb 20 03:06:46 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 20 Feb 2005 00:06:46 -0800
Subject: newbie question - exception processing
References: <1108883612.511033.154920@o13g2000cwo.googlegroups.com>
Message-ID: <1108886806.076691.29000@c13g2000cwb.googlegroups.com>

mirandacascade at yahoo.com wrote:
> O/S: Windows XP Service Pack 2
> Python version: 2.4
>
> Unable to understand how to build a class to handle an exception.
>
> Contents of sample01.py:
> import exceptions
> class SampleMain:
>     try:
>         def __init__(self):
>             print 'in SampleMain constructor'
>
>         def Allowed(self):
>             print 'in allowed'
>
>         def NotYetAllowed(self):
>             UCError = UnderConstructionError('not yet ready')
>             raise UCError
>
>     except UnderConstructionError, e:
>         print e.msg
>
> class Error(exceptions.Exception):
>     def __init__(self):
>         print 'in base class constructor'
>
> class UnderConstructionError(Error):
>     def __init__(self, message):
>         print 'in UnderConstructionError constructor'
>         self.msg = message
>
> Copy/paste of interactive window:
> PythonWin 2.4 (#60, Nov 30 2004, 09:34:21) [MSC v.1310 32 bit
(Intel)]
> on win32.
> Portions Copyright 1994-2004 Mark Hammond (mhammond at skippinet.com.au)
-
> see 'Help/About PythonWin' for further copyright information.
> >>> import sample01
> >>> x = sample01.SampleMain()
> in SampleMain constructor
> >>> x.NotYetAllowed()
> in UnderConstructionError constructor
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
>   File "C:\Python24\sample01.py", line 12, in NotYetAllowed
>     raise UCError
> UnderConstructionError: <unprintable instance object>
> >>>
>
> My questions are:
> 1) What is causing the error described in the Traceback?
> 2) Given that what I want to happen when the NotYetAllowed() method
is
> called is:
>     a) an exception to be raised
>     b) the exception results in a message getting printed; the
message
> should come from the place where the exception was raised, and it
> should be passed to the exception class as a string object; so in
this
> case the message that should be printed is 'not yet ready'
>     c) the exception gets handled with the try/except within the
> SampleMain class
>
> My question is: what changes must I make to the code to make that
> happen?
>
> Thank you.
Hello ,
This is originally snagged from the standard library.
Spend time reading thru the modules they will show you how to do a lot
of things.
# Exception example
class PSCError(Exception):
    # Base for custom errors
    def __init__(self, msg=''):
        self._msg = msg
        Exception.__init__(self, msg)
    def __repr__(self):
        return self._msg
    __str__ = __repr__

class PathError(PSCError):
    def __init__(self, msg):
       PSCError.__init__(self,
         'Path error! : %s'% msg)

class InputError(PSCError):
   def __init__(self, msg):
       PSCError.__init__(self,
         'Input error! : %s'% msg)

# and you use it like this
raise PathError, 'Please check path'
raise InputError, 'Improper input try again'

hth,
M.E.Farmer



From tjreedy at udel.edu  Tue Feb 15 16:49:21 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 15 Feb 2005 16:49:21 -0500
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<cupstp$an7$2@ctb-nnrp2.saix.net><cupupa$kfs$2@usenet.otenet.gr>
	<cupvhi$c15$1@news1.ucsd.edu><cuq084$r99$1@usenet.otenet.gr><XX+64LRqnLECFwAV@objmedia.demon.co.uk><cut6t9$sla$1@usenet.otenet.gr><42123751$0$10042$626a14ce@news.free.fr><cutem3$2t6$2@usenet.otenet.gr><421244f0$0$30339$636a15ce@news.free.fr>
	<cutipk$l5a$1@usenet.otenet.gr>
Message-ID: <cutqk7$c39$1@sea.gmane.org>

In his 15 post on this thread within 5 hours,
"Ilias Lazaridis" <ilias at lazaridis.com> wrote in message
> Please explain the word "prolific".







From snail at objmedia.demon.co.uk  Fri Feb 18 05:52:22 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Fri, 18 Feb 2005 10:52:22 +0000
Subject: [EVALUATION] - E02 - ULTIMATE RECIPE TO RESOLVE ALL ISSUES
References: <cuo71l$gig$1@usenet.otenet.gr> <cuv1st$6um$1@swifty.westend.com>
	<cv2m54$hnf$1@usenet.otenet.gr>
	<oTF1JdVCdOFCFwep@objmedia.demon.co.uk>
	<cv4bjd$m15$1@ctb-nnrp2.saix.net>
Message-ID: <VFcacTFmjcFCFw42@objmedia.demon.co.uk>

In message <cv4bjd$m15$1 at ctb-nnrp2.saix.net>, David Fraser 
<davidf at sjsoft.com> writes
>Actually I suspect Ilias is trying to carry out his own sort of 
>'survey' on how various communities respond to questions asked in the 
>kind of way he asked them ... See his web site.

Its as unreadable as his network news postings. One of the first things 
I did was check out his website. I didn't gain a lot as it is written in 
his typical automaton style. It actively discourages you from engaging. 
Thats quite an achievement for a static piece of text.

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From jdhunter at ace.bsd.uchicago.edu  Mon Feb 14 16:03:59 2005
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Mon, 14 Feb 2005 15:03:59 -0600
Subject: Commerical graphing packages?
In-Reply-To: <200502142143.58961.francis.girard@free.fr> (Francis Girard's
	message of "Mon, 14 Feb 2005 21:43:58 +0100")
References: <420d1595$1@nntp.zianet.com> <cupsik$an7$1@ctb-nnrp2.saix.net>
	<200502142143.58961.francis.girard@free.fr>
Message-ID: <m3acq6lups.fsf@peds-pc311.bsd.uchicago.edu>

>>>>> "Francis" == Francis Girard <francis.girard at free.fr> writes:

    Francis> PyX might also be interesting, depending on your needs.

While pyx is a very nice package, it is probably not a good choice for
web app developers simply because it generates postscript, which is
not very browser friendly.  Once could send the PS through a converter
such as ImageMagick, but it would probably be better to use a library
that generates browser friendly output natively.

matplotlib on the other hand, *does* work in web app servers, and
generates PNG/SVG natively.  See
http://matplotlib.sourceforge.net/faq.html#APPSERVER

Although it is a free and open source package, I think that the image
quality and support is on par with if not superior to what you find in
many commercial solutions.  If the OP wants commercial support, he
might consider contacting the developer off-list :-)

JDH


From kent37 at tds.net  Tue Feb  8 07:47:47 2005
From: kent37 at tds.net (Kent Johnson)
Date: Tue, 08 Feb 2005 07:47:47 -0500
Subject: Big development in the GUI realm
In-Reply-To: <mailman.2154.1107858003.22381.python-list@python.org>
References: <mailman.2123.1107820051.22381.python-list@python.org><4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com><cu95nd$7cr$1@news1.ucsd.edu><6h7g0113up1v76k7qkad7bt17os1q73510@4ax.com><4208237b$0$21623$a1866201@visi.com>	<cu98n4$833$1@news1.ucsd.edu><4208373e$0$21620$a1866201@visi.com>	<cu9eg0$9jb$1@news1.ucsd.edu><mailman.2149.1107853311.22381.python-list@python.org>	<cua0eq$ecj$1@news1.ucsd.edu>
	<mailman.2154.1107858003.22381.python-list@python.org>
Message-ID: <4208b224$1_1@newspeer2.tds.net>

Fredrik Lundh wrote:
> Robert Kern wrote:
> 
> 
>>Fair enough. The only time I've seen it in dead-tree print was in Heinlein's _Time Enough For 
>>Love_, unattributed to anyone else.

Amazon.com "search inside the book" finds no hits for "malice" in this book.
http://www.amazon.com/gp/reader/0441810764/102-7636110-6481700?v=search-inside&keywords=malice

> 
> 
> if that's true, it would seem that it predates the Hanlon reference by a
> couple of years:
> 
>     http://www.statusq.org/archives/2001/12/04
> 
> on the other hand, Google tells me that "Time Enough For Love" con-
> tains a couple of other famous stupidity quotes, including:
> 
>     "Never underestimate the power of human stupidity"

"Search inside the book" finds this *twice* in "Time Enough For Love".

Kent


From unknownsoldier93 at yahoo.com  Thu Feb 24 20:50:35 2005
From: unknownsoldier93 at yahoo.com (gf gf)
Date: Thu, 24 Feb 2005 17:50:35 -0800 (PST)
Subject: Flushing print()
Message-ID: <20050225015035.29386.qmail@web20701.mail.yahoo.com>

Is there any way to make Python's print() flush
automatically, similar to...mmm...that other
language's $|=1 ?

If not, how can I flush it manually? 
sys.stdout.flush() didn't seem to work.


		
__________________________________ 
Do you Yahoo!? 
Yahoo! Mail - now with 250MB free storage. Learn more.
http://info.mail.yahoo.com/mail_250


From tundra at tundraware.com  Fri Feb  4 01:48:13 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 04 Feb 2005 01:48:13 EST
Subject: OT: why are LAMP sites slow?
In-Reply-To: <7xlla5t3lw.fsf@ruckus.brouhaha.com>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<kavad2-59d.ln1@eskimo.tundraware.com>
	<7xlla5t3lw.fsf@ruckus.brouhaha.com>
Message-ID: <g9ibd2-kuf.ln1@eskimo.tundraware.com>

Paul Rubin wrote:

> Tim Daneliuk <tundra at tundraware.com> writes:
> 
>>I worked for an Airline computer reservation system (CRS) for almost a
>>decade. There is nothing about today's laptops that remotely comes close
>>to the power of those CRS systems, even the old ones. CRS systems are
>>optimized for extremely high performance I/O and use an operating system
>>(TPF) specifically designed for high-performance transaction processing.
> 
> 
> Yeah, I've been interested for a while in learning a little bit about
> how TPF worked.  Does Gray's book that you mention say much about it?

I honestly do not recall.  TPF/PAARS is an odd critter unto itself
that may not be covered by much of anything other than IBM docs.

> 
> I think that the raw hardware of today's laptops dwarfs the old big
> iron.  An S/360 channel controller may have basically been a mainframe
> in its own right, but even a mainframe in those days was just a few
> MIPS.  The i/o systems and memory are lots faster too, though not by
> nearly the ratio by which storage capacity and cpu speed have
> increased.  E.g., a laptop disk these days has around 10 msec latency
> and 20 MB/sec native transfer speed, vs 50+ msec and a few MB/sec for
> a 3330-level drive (does that sound about right?.  

Again, I don't know.  The stuff we had was much newer (and faster) than
that.

> 
> 
>>Web servers are very sessions oriented: make a connection-pass the
>>unit of work-drop the connection. This is inherently slow (and not
>>how high performance TP is done). Moreover, really high perfomance
>>requires a very fine level of I/O tuning on the server - at the CRS
>>I worked for, they performance people actually only populated part
>>of the hard drives to minimize head seeks.
> 
> 
> Today I think most seeks can be eliminated by just using ram or SSD
> (solid state disks) instead of rotating disks.  But yeah, you wouldn't
> do that on a laptop.

But that still does not solve the latency problem of session establishment/
teardown over network fabric which is the Achilles Heel of
the web and web services.

> 
> 
>>For a good overview of TP design, see Jim Gray's book, "Transaction
>>Processing: Concepts and Techniques".
> 
> 
> Thanks, I'll look for this book.  Gray of course is one of the
> all-time database gurus and that book is probably something every
> serious nerd should read.  I've probably been a bad boy just for
> having not gotten around to it years ago.
> 
> 
>>P.S. AFAIK the first CRS systems of any note came into being in the 1970s not
>>      the 1960s, but I may be incorrect in the matter.
> 
> 
> From <http://en.wikipedia.org/wiki/Sabre_%28computer_system%29>:
> 
>     The system [SABRE] was created by American Airlines and IBM in the
>     1950s, after AA president C. R. Smith sat next to an IBM sales
>     representative on a transcontinental flight in 1953. Sabre's first
>     mainframe in Briarcliff Manor, New York went online in 1960. By
>     1964, Sabre was the largest private data processing system in the
>     world. Its mainframe was moved to an underground location in
>     Tulsa, Oklahoma in 1972.
> 
>     Originally used only by American, the system was expanded to travel
>     agents in 1976. It is currently used by a number of companies,
>     including Eurostar, SNCF, and US Airways. The Travelocity website is
>     owned by Sabre and serves as a consumer interface to the system.

I stand (sit) corrected ;)
-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From nessus at mit.edu  Mon Feb 28 20:11:55 2005
From: nessus at mit.edu (Douglas Alan)
Date: Mon, 28 Feb 2005 20:11:55 -0500
Subject: Canonical way of dealing with null-separated lines?
References: <lcll9efw8l.fsf@gaffa.mit.edu>
	<mailman.3006.1109264015.22381.python-list@python.org>
	<5aes11d4da95un1n78vtb04m43269hqo4m@4ax.com>
	<mailman.3020.1109281886.22381.python-list@python.org>
	<lc7jkvdcxq.fsf@gaffa.mit.edu> <lcis4esyx0.fsf@gaffa.mit.edu>
Message-ID: <lcr7j0uq3o.fsf@gaffa.mit.edu>

I wrote:

> Oops, I just realized that my previously definitive version did not
> handle multi-character newlines.  So here is a new definitive
> version.  Oog, now my brain hurts:

I dunno what I was thinking.  That version sucked!  Here's a version
that's actually comprehensible, a fraction of the size, and works in
all cases.  (I think.)

def fileLineIter(inputFile, newline='\n', leaveNewline=False, readSize=8192):
   """Like the normal file iter but you can set what string indicates newline.
   
   The newline string can be arbitrarily long; it need not be restricted to a
   single character. You can also set the read size and control whether or not
   the newline string is left on the end of the iterated lines.  Setting
   newline to '\0' is particularly good for use with an input file created with
   something like "os.popen('find -print0')".
   """
   outputLineEnd = ("", newline)[leaveNewline]
   partialLine = ''
   while True:
       charsJustRead = inputFile.read(readSize)
       if not charsJustRead: break
       lines = (partialLine + charsJustRead).split(newline)
       partialLine = lines.pop()
       for line in lines: yield line + outputLineEnd
   if partialLine: yield partialLine

|>oug


From rupole at hotmail.com  Thu Feb  3 10:32:35 2005
From: rupole at hotmail.com (Roger Upole)
Date: Thu, 3 Feb 2005 10:32:35 -0500
Subject: Where is WSAEnumNetworkEvents???
References: <1107376894.420724.260230@c13g2000cwb.googlegroups.com>
Message-ID: <420244a7$1_2@127.0.0.1>

>From a quick look, it wouldn't be too difficult to wrap this function.
Both the input arguments can be already be handled by Swig,
and the outputs would just be an int and a fixed size tuple of ints.

            Roger

<elbertlev at hotmail.com> wrote in message 
news:1107376894.420724.260230 at c13g2000cwb.googlegroups.com...
>I was trying to write an asyncronous TCP server for win32 using
> WSAEventSelect (which lives if win32file). Such events require
> WaitForMultipleObjects (which lives if win32event) and
> WSAEnumNetworkEvents WHICH IS NOT EXPOSED. This makes WSAEventSelect
> useless. Does somebody know how to add the WSAEnumNetworkEvents and
> WSANetwotkEvents structure win32file?
>
> Maybe I'm missing something?
> 




----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! >100,000 Newsgroups
---= East/West-Coast Server Farms - Total Privacy via Encryption =---


From Peter.Vandersteegen at gmail.com  Wed Feb 16 10:14:21 2005
From: Peter.Vandersteegen at gmail.com (peter)
Date: 16 Feb 2005 07:14:21 -0800
Subject: adding new functionality to a function non-intrusively!
In-Reply-To: <1108565856.655370.255590@f14g2000cwb.googlegroups.com>
References: <1108564620.657526.301320@g14g2000cwa.googlegroups.com>
	<1108565856.655370.255590@f14g2000cwb.googlegroups.com>
Message-ID: <1108566861.580030.275620@f14g2000cwb.googlegroups.com>

thx a lot for the information on decorators

this will be very usefull... (sounds like a little step towards aspect
orientated programming,:) )

Because I use libraries which rely on boost-python I  can not jump into
python 2.4

but I understand the main idea and can also use it in python 2.3
(it will only cost a little bit more extra coding)



From petite.abeille at gmail.com  Thu Feb 10 17:10:10 2005
From: petite.abeille at gmail.com (PA)
Date: Thu, 10 Feb 2005 23:10:10 +0100
Subject: XDR? (was Re: is there a safe marshaler?)
In-Reply-To: <420bd83e$0$28990$e4fe514c@news.xs4all.nl>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>	<mailman.2327.1108055983.22381.python-list@python.org>	<420bd06f$0$28991$e4fe514c@news.xs4all.nl>
	<mailman.2344.1108071535.22381.python-list@python.org>
	<420bd83e$0$28990$e4fe514c@news.xs4all.nl>
Message-ID: <a3069f5269d75f3dfeb9766f1ebd4c98@gmail.com>


On Feb 10, 2005, at 22:55, Irmen de Jong wrote:

> Also, it seems ill-fit for  efficient machine-to-machine
> communication...

Well, then, if you are looking for industrial strength quality, ASN.1 
is the way to go. After all, a good chunk of the telecom infrastructure 
is using it.

Cheers

--
PA, Onnay Equitursay
http://alt.textdrive.com/



From jimmy at retzlaff.com  Sat Feb 26 21:15:34 2005
From: jimmy at retzlaff.com (Jimmy Retzlaff)
Date: Sat, 26 Feb 2005 18:15:34 -0800
Subject: string methods (warning, newbie)
Message-ID: <A7B5C22F20EE3C4E95744E2F03F1887F380869@MAYOR.retzlaff.com>

Anthonyberet wrote:
> Is there a string mething to return only the alpha characters of a
string?
> eg 'The Beatles - help - 03 - Ticket to ride', would be
> 'TheBeatlesTickettoride'
> 
> If not then how best to approach this?
> I have some complicated plan to cut the string into individual
> characters and then concatenate a new string with the ones that return
> true with the .isalpha string method.
> 
> Is there an easier way?

The approach you are considering may be easier than you think:

>>> filter(str.isalpha, 'The Beatles - help - 03 - Ticket to ride')
'TheBeatleshelpTickettoride'

Jimmy


From wittempj at hotmail.com  Wed Feb  9 15:15:46 2005
From: wittempj at hotmail.com (wittempj at hotmail.com)
Date: 9 Feb 2005 12:15:46 -0800
Subject: two questions - no common theme
In-Reply-To: <e5063e96.0502091207.37b1dd54@posting.google.com>
References: <e5063e96.0502091207.37b1dd54@posting.google.com>
Message-ID: <1107980146.833690.87590@l41g2000cwc.googlegroups.com>

os.walk gives an object with all files in a tree, e.g.
f = os.walk('c:\\temp')
for i in f:
	print i



From deetsNOSPAM at web.de  Mon Feb 21 17:23:28 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 21 Feb 2005 23:23:28 +0100
Subject: high resolution time needed
References: <cvdmnv$jbe$1@news2.rz.uni-karlsruhe.de>
Message-ID: <cvdn0u$ibf$00$1@news.t-online.com>

> I need a function returning a time value with a higher resolution that the
> standard 1sec unix timestamp. I found the clock() function in the time
> module, but that seems to return the same value (in the Python shell) each
> time I call it (Debian Linux speaking here).

Standard unix is a millisecond. And time.time() actually delivers a float
with sub-second precision. 


------------
import time
t = time.time()
time.sleep(.25)
print time.time() - t
------------

gives for me (also debian) 0.249767065048 secs.

-- 
Regards,

Diez B. Roggisch


From everettcc at hotmail.com  Mon Feb 14 15:58:07 2005
From: everettcc at hotmail.com (Chad Everett)
Date: Mon, 14 Feb 2005 14:58:07 -0600
Subject: Newbie help
References: <lvUPd.10137$pE1.923@bignews3.bellsouth.net>
	<mailman.2568.1108413446.22381.python-list@python.org>
Message-ID: <Le8Qd.605$3b7.602@bignews3.bellsouth.net>

Nope,  I am trying to learn it on my own.  I am using the book by Michael 
Dawson.

Thanks,
"Francis Girard" <francis.girard at free.fr> wrote in message 
news:mailman.2568.1108413446.22381.python-list at python.org...
Mmm. This very much look like a homework from school. Right ?
Francis Girard

Le lundi 14 F?vrier 2005 04:03, Chad Everett a ?crit :
> Hey guys,
>
> Hope you can help me again with another problem.  I am trying to learn
> Python on my own and need some help with the following.
>
> I am writing a program that lets has the pc pick a number and the user
> has five guess to get the number.
> 1. BUG:  If the number is say 35 and I guess 41 the program tells me
> that I guessed the correct number and tells me I guessed 31.
>
> 2.When I do get the correct number I can not get the program to stop
> asking me for the number.
>
>
> Your help is greatly appreciated.
>
> Chad
>
> # Five Tries to Guess My Number
> #
> # The computer picks a random number between 1 and 100
> # The player gets Five tries to guess it and the computer lets
> # the player know if the guess is too high, too low
> # or right on the money
> #
> # Chad Everett 2/10/2005
>
> import random
>
> print "\tWelcome to 'Guess My Number'!"
> print "\nI'm thinking of a number between 1 and 100."
> print "You Only Have Five Guesses.\n"
>
> # set the initial values
> number = random.randrange(100) + 1
> guess = int(raw_input("Go Ahead and Take a guess: "))
> tries = 1
>
>
> # guessing loop
>
>
> while guess != number:
>
>      if (guess > number):
>          print "Guess Lower..."
>      else:
>          print "Guess Higher..."
>
>      guess = int(raw_input("Take Another guess: "))
>      tries += 1
>
>      print "You guessed it!  The number was", number
>      print "And it only took you", tries, "tries!\n"
>
>      if tries == 5:
>          print "Sorry You Lose!!!!"
>          print "The Number was ", number
>
> raw_input("\n\nPress the enter key to exit.")
>
> THIS IS WHAT THE RESULTS LOOKS LIKE WHEN I RUN THE PROGRAM
>
> Welcome to 'Guess My Number'!
>
> I'm thinking of a number between 1 and 100.
> You Only Have Five Guesses.
>
> Go Ahead and Take a guess: 99
> Guess Lower...
> Take Another guess: 98
> You guessed it!  The number was 85
> And it only took you 2 tries!
>
> Guess Lower...
> Take Another guess: 44
> You guessed it!  The number was 85
> And it only took you 3 tries!
>
> Guess Higher...
> Take Another guess: 55
> You guessed it!  The number was 85
> And it only took you 4 tries!
>
> Guess Higher...
> Take Another guess: 33
> You guessed it!  The number was 85
> And it only took you 5 tries!
>
> Sorry You Lose!!!!
> The Number was  85
> Guess Higher...
> Take Another guess:




From andrewjt at applecomm.net  Tue Feb 22 18:56:39 2005
From: andrewjt at applecomm.net (Andrew Thomson)
Date: Wed, 23 Feb 2005 10:56:39 +1100
Subject: python tutorial/projects
In-Reply-To: <cvgf2o$u42$1@agate.berkeley.edu>
References: <cvgf2o$u42$1@agate.berkeley.edu>
Message-ID: <1109116599.33907.1.camel@itouch-1011.prv.au.itouchnet.net>

On Tue, 2005-02-22 at 15:23 -0800, Danny wrote:
> Does anyone know of a good python tutorial?

I found this one most helpful.

http://www.ibiblio.org/obp/thinkCSpy/

ajt.

> I was also looking for some non-trivial projects to do in python.
> 
> 
> Basically I would like to claim on my resume, that I know python, with 
> out bad karma.
> 
> Danny
-- 
Andrew Thomson <andrewjt at applecomm.net>



From ods at strana.ru  Sat Feb 12 03:43:38 2005
From: ods at strana.ru (Denis S. Otkidach)
Date: Sat, 12 Feb 2005 11:43:38 +0300
Subject: sre is broken in SuSE 9.2
In-Reply-To: <cuir3t$tlf$1@sea.gmane.org>
References: <mailman.2299.1108029731.22381.python-list@python.org>
	<1108060527.378911.146240@o13g2000cwo.googlegroups.com>
	<cugc2v$i8u$1@swifty.westend.com>
	<1108064973.719544.228970@z14g2000cwz.googlegroups.com>
	<mailman.2372.1108115088.22381.python-list@python.org>
	<1108133339.401022.272310@f14g2000cwb.googlegroups.com>
	<cuir3t$tlf$1@sea.gmane.org>
Message-ID: <20050212114338.6fc75b9c.ods@strana.ru>

On Fri, 11 Feb 2005 18:49:53 +0100
"Fredrik Lundh" <fredrik at pythonware.com> wrote:

> >> >>> re.compile(ur'\w+', re.U).findall(u'\xb5\xba\xe4\u0430')
> >> [u'\xb5\xba\xe4\u0430']
> >
> > I can't find the strict definition of isalpha, but I believe average
> > C program shouldn't care about the current locale alphabet, so isalpha
> > is a union of all supported characters in all alphabets
> 
> btw, what does isalpha have to do with this example?

The same problem is with isalpha.  In most distributions:
>>> for c in u'\xb5\xba\xe4\u0430': print c.isalpha(),
... 
True True True True

And in SuSE 9.2:
>>> for c in u'\xb5\xba\xe4\u0430': print c.isalpha(),
... 
False False False False

-- 
Denis S. Otkidach
http://www.python.ru/      [ru]


From mesteve_bpleaseremovethis at hotmail.com  Sun Feb 13 20:57:52 2005
From: mesteve_bpleaseremovethis at hotmail.com (StvB)
Date: Mon, 14 Feb 2005 01:57:52 GMT
Subject: OS env for Windows
References: <mailman.2503.1108343952.22381.python-list@python.org>
Message-ID: <AATPd.4729$aW6.2305@newssvr22.news.prodigy.net>

If Cary Grant's ghost was into Python and saw this good info, he'd say: 
"That's just ducky."
But he's probably not.

Ok Thanks Tony - I've always wanted to try out win32api module. Just what I 
need.

"Tony Meyer" <t-meyer at ihug.co.nz> wrote in message 
news:mailman.2503.1108343952.22381.python-list at python.org...
>> Is there any other way
>> of distinguishing between XP and 2000 I wonder?
>
> WinXP SP2:
>
>>>> import win32api
>>>> major, minor, spack, platform, ver_str = win32api.GetVersionEx()
>>>> print major, minor, spack, platform, ver_str
> 5 1 2600 2 Service Pack 2
>
> WinNT SP4:
>
>>>> import win32api
>>>> major, minor, spack, platform, ver_str = win32api.GetVersionEx()
>>>> print major, minor, spack, platform, ver_str
> 5 0 2195 2 Service Pack 4
>
> =Tony.Meyer
> 




From jjl at pobox.com  Fri Feb  4 15:13:44 2005
From: jjl at pobox.com (John J. Lee)
Date: 04 Feb 2005 20:13:44 +0000
Subject: string issue
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
	<36QMd.103084$Jk5.36127@lakeread01>
Message-ID: <87lla4w0av.fsf@pobox.com>

Steve Holden <steve at holdenweb.com> writes:
[...]
> You are modifying the list as you iterate over it. Instead, iterate
> over a copy by using:
> 
> for ip in ips[:]:
>    ...

Just to help popularise the alternative idiom, which IMO is
significantly less cryptic (sane constructors of mutable objects
almost always make a copy, and list is no exception: it's guaranteed
to do so):

for ip in list(ips):
   ...


Works back to at least Python 1.5.2.


John


From tmj at SPAMLESSjarmania.com  Fri Feb  4 09:19:48 2005
From: tmj at SPAMLESSjarmania.com (Tim Jarman)
Date: Fri, 04 Feb 2005 14:19:48 +0000
Subject: dynamic func. call
References: <ctvrdk$evf$1@bagan.srce.hr>
Message-ID: <36hek4F4vq3gpU1@individual.net>

Aljosa Mohorovic wrote:

> can i do something like this:
> 
> s = "myFunction"
> a = s() # equals to: a = myFunction()

Functions are first-class objects in Python, so you can do:

def myFunction():
    # whatever

which creates a function object and binds the name myFunction to it. Then:

s = myFunction

just binds the name s to your function object, and therefore:

a = s()

is the same as:

a = myFunction()


-- 
Website: www DOT jarmania FULLSTOP com


From tjreedy at udel.edu  Wed Feb  2 16:57:25 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 2 Feb 2005 16:57:25 -0500
Subject: pythonic equivalent of Mathematica's FixedPoint function
References: <1107273234.276714.272890@z14g2000cwz.googlegroups.com><1107273715.614766.32810@f14g2000cwb.googlegroups.com><mailman.1711.1107294069.22381.python-list@python.org>
	<1107335766.734539.281770@l41g2000cwc.googlegroups.com>
Message-ID: <ctrib5$hoe$1@sea.gmane.org>


"jelle" <jelleferinga at gmail.com> wrote in message 
news:1107335766.734539.281770 at l41g2000cwc.googlegroups.com...
> >You could probably write your own FixedPoint function without too much
>>difficulty, with the only tricky part being for it to know when to
> stop!
>
> It would be quite interesting to have this kind of function. But
> likely its far from trivial.

Fixed point iteration is a standard technique in numerical analysis --  
floating point calculations as approximation of real-number functions.  The 
first problem is getting an equation form that will converge  -- which has 
a stable, preferably unique fixed point.  The second is how to start --  
getting a first approximation that leads to convergence.  For stopping, one 
must choose between relative and absolute changes in the variable or 
expression (in x or y) or some combiniation thereof.

> FixedPoint seems to be one of the core functions in Mathematica, where
> many other functions are based on. Some additions such as FixedPoint
> would make functional programming in Python [easier].

It belongs in a module of floating-point equation solvers.  Perhaps one is 
already in scipy.

Terry J. Reedy





From ggrp1.20.martineau at dfgh.net  Wed Feb 16 16:40:24 2005
From: ggrp1.20.martineau at dfgh.net (Martin)
Date: 16 Feb 2005 13:40:24 -0800
Subject: Can __new__ prevent __init__ from being called?
References: <87is4tldea.fsf@news2.ososo.de>
Message-ID: <1108590024.760668.31280@z14g2000cwz.googlegroups.com>

Felix Wiemann wrote:
> Sometimes (but not always) the __new__ method of one of my classes
> returns an *existing* instance of the class.  However, when it does
> that, the __init__ method of the existing instance is called
> nonetheless, so that the instance is initialized a second time.

[snip]

> How can I prevent __init__ from being called on the
already-initialized
> object?
>
> I do not want to have any code in the __init__ method which checks if
> the instance is already initialized (like "if self.initialized:
return"
> at the beginning) because that would mean I'd have to insert this
> checking code in the __init__ method of every subclass.
>
> Is there an easier way than using a metaclass and writing a custom
> __call__ method?

Yes. You could move all your initalization logic from __init__ to a
separate init method and use the following simple recipe that does not
involve metaclasses and overriding __call__.

Although the base class __init__ does have to check to see if the
instance is initialized, you don't have to repeat the code in derived
classes:

class C(object):
    def __new__(cls, *args, **kwds):
        it = cls.__dict__.get("__it__")
        if it is not None:
            return it
        cls.__it__ = it = object.__new__(cls)
        it.init(*args, **kwds)
        return it

    def init(self, *args, **kwds):  # only called once
        print 'In C init.'
        pass

    def __init__(self):             # called each time
        print 'In C __init__.'

class D(C):
    def init(self, *args, **kwds):  # only called once
        print 'In D init.'
        pass

    def __init__(self):             # called each time
        print 'In D __init__.'

>>> C()
In C init.
In C __init__.

>>> C()
In C __init__.

>>> D()
In D init.
In D __init__.

>>> D()
In D __init__.

-Martin



From sylvain.thenault at nospam.logilab.fr  Wed Feb  2 04:29:37 2005
From: sylvain.thenault at nospam.logilab.fr (Sylvain Thenault)
Date: Wed, 02 Feb 2005 10:29:37 +0100
Subject: Next step after pychecker
References: <41ff0308$0$6503$636a15ce@news.free.fr>
	<pan.2005.02.01.10.21.23.762637@nospam.logilab.fr>
	<11000kcim8pvh6c@news.supernews.com>
Message-ID: <pan.2005.02.02.09.29.36.668226@nospam.logilab.fr>

On Tue, 01 Feb 2005 16:27:48 -0600, John Roth wrote:

> 
> "Sylvain Thenault" <sylvain.thenault at nospam.logilab.fr> wrote in message
> news:pan.2005.02.01.10.21.23.762637 at nospam.logilab.fr...
>> On Tue, 01 Feb 2005 05:18:12 +0100, Philippe Fremy wrote:
>>
>> Did you take a look at the starkiller [1] and pypy projects [2] ?
> 
> Has anything happened to Starkiller since PyCon 2004? The latest mention I
> can find on Google is a blog entry (by Ted Leung) on Aug 30 saying he
> wished someone would give the author some money to finish it and publish
> it.

nothing I'm aware of. Some people talked about it, but no news from
starkiller's author. However some posts mention that it already has some
usable output now.

-- 
Sylvain Th?nault                               LOGILAB, Paris (France).

http://www.logilab.com   http://www.logilab.fr  http://www.logilab.org




From jerf at jerf.org  Fri Feb  4 07:55:01 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 04 Feb 2005 07:55:01 -0500
Subject: "Collapsing" a list into a list of changes
References: <dvOMd.33656$EG1.19314@lakeread04>
Message-ID: <pan.2005.02.04.12.55.01.685657@jerf.org>

On Fri, 04 Feb 2005 12:43:37 -0500, Alan McIntyre wrote:
> def straightforward_collapse(myList):
>      collapsed = [myList[0]]
>      for n in myList[1:]:
>          if n != collapsed[-1]:
>              collapsed.append(n)
> 
>      return collapsed
> 
> Is there an elegant way to do this, or should I just stick with the code 
> above?

I think that's pretty elegant; I read it and immediately understood what
you were doing. There may be some performance tweaks you could make if you
were doing this to large lists, and my instincts say to re-write it as an
iterator if you use it a lot like:

for item in collapse(yourList):

but other than that which may not even apply, "straightforward" is
generally a *good* thing, don't you think? :-)



From http  Wed Feb 16 10:03:45 2005
From: http (Paul Rubin)
Date: 16 Feb 2005 07:03:45 -0800
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<mailman.2688.1108566050.22381.python-list@python.org>
Message-ID: <7xpsz04kdq.fsf@ruckus.brouhaha.com>

Tom Willis <tom.willis at gmail.com> writes:
> Sounds like you want pickle or cpickle. 

No, the issue is how to handle multiple clients trying to update the
pickle simultaneously.


From maxm at mxm.dk  Thu Feb 17 11:00:19 2005
From: maxm at mxm.dk (Max M)
Date: Thu, 17 Feb 2005 17:00:19 +0100
Subject: tiff via email-module
In-Reply-To: <mailman.2756.1108646172.22381.python-list@python.org>
References: <mailman.2756.1108646172.22381.python-list@python.org>
Message-ID: <4214bebe$0$218$edfadb0f@dread12.news.tele.dk>

Arenz, Ralph wrote:
> hi all,
> 
> my problem is to get a tiff-file-attachment out of an email sent by a
> fax-server.
> When i try this with "get_payload(decode='True')" i get additional 
> informations, looks like binary-mixed header-information, enveloping the 
> tiff-data. 

get_payload(decode=1) returns the decoded data. eg. the "binary" value 
of a file attachement.

If you get additional information there is most likely something wrong 
with your message, or you are not traversing it correctly.

You should do something like::

# untested

def getAttachments(message):
     "Returns attachments from message"
     maintype = message.get_type()
     if maintype == 'application/octet-stream' :
         return [message.get_payload(decode=1)]
     if message.is_multipart():
         attachments = []
         for part in message.walk():
             attachments.append(part.get_payload(decode=1))
         return attachments
     return []


-- 

hilsen/regards Max M, Denmark

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


From danperl at rogers.com  Thu Feb 10 09:38:12 2005
From: danperl at rogers.com (Dan Perl)
Date: Thu, 10 Feb 2005 09:38:12 -0500
Subject: newbie question
References: <1107990182.516041.120410@o13g2000cwo.googlegroups.com>
	<seudnRY79e_AXJffRVn-pg@rogers.com> <feuqd2-bqv.ln1@lairds.us>
	<9tidneo6EZm1QpffRVn-sg@rogers.com>
	<dsWdnSiaAL8u9JbfRVn-sg@powergate.ca>
Message-ID: <WKGdnYOLbtRE7JbfRVn-rg@rogers.com>


"Peter Hansen" <peter at engcorp.com> wrote in message 
news:dsWdnSiaAL8u9JbfRVn-sg at powergate.ca...
> Dan Perl wrote:
>> OTOH, I was thinking of saying in my previous posting that I prefer
>>     for n in range(start, 0, -1):
>> to
>>     n = start
>>     while (n--)
>> I think that the first form is more readable, although that may be just 
>> me. I would actually even prefer the 'for' statement in C to the 'while' 
>> statement:
>>     for (n=start; n<=0; n--)
>
> I'm not sure if it's just picking nits, but I'd like to
> point out that neither of your alternatives is actually
> equivalent to the while (n--) form...  nor was Jeff
> Shannon's attempt (in that case it leaves the loop with
> n equal to 0, not -1).

You're right in your nit picking.  I have to go back to using some C/C++ and 
Java also, I don't want to forget them completely. 




From ericjardim at gmail.com  Fri Feb 11 17:19:46 2005
From: ericjardim at gmail.com (Eric Jardim)
Date: 11 Feb 2005 14:19:46 -0800
Subject: PyQt documentation
References: <1108088253.552834.44690@z14g2000cwz.googlegroups.com>
	<373it0F4uglf9U1@individual.net>
	<1108131643.216301.92510@o13g2000cwo.googlegroups.com>
	<373u0qF58g57fU1@individual.net>
	<1108157806.674018.58490@l41g2000cwc.googlegroups.com>
	<cuj9bh$uea$02$1@news.t-online.com>
Message-ID: <1108160386.303328.327060@f14g2000cwb.googlegroups.com>

[...]
> No having said that, I totally agree that such information is surely
needed
> - but I doubt that it really makes sense to create full docs at a api
> level. It would be hard to be in sync with the qt development itself.

I agree with that. But there are alternative ways of doing this without
being perfectly sync with Qt API.


> Instead a wiki which captures the various pitfalls would be cool. And
it
> appears it exists:
> http://www.diotavelli.net/PyQtWiki

Fine, we finnaly got the point. A Wiki is perfect for "imperfect"
tasks.


> So maybe enhancing that would be an option for you?

Yes, maybe. I'll take  look.

thanks again,


[Eric Jardim]



From ville at spammers.com  Sun Feb 20 11:38:50 2005
From: ville at spammers.com (Ville Vainio)
Date: 20 Feb 2005 18:38:50 +0200
Subject: [Fwd: Re: [Uuu-devel] languages] <-- Why Python
References: <mailman.2781.1108677768.22381.python-list@python.org>
	<1108678805.542584.171930@z14g2000cwz.googlegroups.com>
	<mailman.2783.1108679758.22381.python-list@python.org>
	<864qgaisoq.fsf@guru.mired.org>
	<mailman.2785.1108689484.22381.python-list@python.org>
	<86vf8qhcql.fsf@guru.mired.org>
	<mailman.2787.1108691319.22381.python-list@python.org>
	<86r7jdh5vw.fsf@guru.mired.org>
	<mailman.2852.1108869628.22381.python-list@python.org>
	<1108877742.416530@yasure>
Message-ID: <du7ll9j2nl1.fsf@amadeus.cc.tut.fi>

>>>>> "Donn" == Donn Cave <donn at drizzle.com> writes:

    Donn> I don't know what the Windows version is like, but for all
    Donn> the UNIX shell's weaknesses, it's very well suited to its
    Donn> role.  The Plan 9

I don't know about that - I don't see anything in shell that couldn't
be done better in Python (well, launching subshells perhaps, and the
smaller size == faster launch). The Windows incarnation is obviously
so horrible that it hardly deserves mention, but the scripts done with
unix shell also always have this "hackish" flavour.

(I'm aware that this is an unpopular opinion that is likely to collect
some flames, but some people never learn ;-).


    Donn> shell (rc) is similar with much improved syntax, and has a
    Donn> distant relative "es" that I think is the closest thing I've
    Donn> ever seen to a 1st class language that works as a shell

I assume you've tried IPython ('ipython -p pysh')? I just apt-getted
es and it seems to be like ipython, only for scheme.

    Donn> Well, honestly I think that's stretching it.  Your order
    Donn> issue here seems to apply only to operators, and they don't
    Donn> really figure that heavily in the kinds of things we
    Donn> normally do with the OS.  The only

I think they do - summing sets of files, adding extensions to
filenames, etc. 

    Donn> Now, we Python users know very well that's not true, Python's as clear
    Donn> as could be.  But theoretically, if you wanted to talk about order
    Donn> issues, for example ... is it really easier to understand when a language
    Donn> sometimes expresses a function f over x and y this way
    Donn> f(x, y)
    Donn> sometimes this way (+ is a function, really)
    Donn> x f y
    Donn> and sometimes this way
    Donn> x.f(y)
    Donn> ?

Yes - operators like + and - are very intuitive to everybody. Having
only one way to call functions is more orthogonal and "cleaner" in a
theoretical sense, but noi in practical sense.

    Donn> I don't know, I'm just thinking that while Python's notation
    Donn> might be just fine for people who've gotten here the way
    Donn> most of us have, it's not obvious from this that it's just
    Donn> fine 4 everyone.

Perhaps not for everyone but for the majority I guess the python
notation would be more suitable.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From deetsNOSPAM at web.de  Sun Feb 20 09:28:34 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sun, 20 Feb 2005 15:28:34 +0100
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr> <cv7k8e$4pa$03$1@news.t-online.com>
	<cv7m2m$gp$1@usenet.otenet.gr> <cv7nh1$b57$03$1@news.t-online.com>
	<cv7r15$lhm$1@usenet.otenet.gr> <cv7vte$t1g$01$1@news.t-online.com>
	<1108849567.136885.141960@z14g2000cwz.googlegroups.com>
Message-ID: <cva6qj$kou$04$1@news.t-online.com>

> If you put yourself into the shoes of someone who decides to use a
> Python product that requires compiling, and that product contains C
> extensions that also need compiling, you'll see that it doesn't matter
> whether or not that individual has actually written a single line of
> Python themselves.  If the compiling process is not easy, then that
> user will be forced to fiddle with nitty gritty details about which
> they'd rather remain ignorant.

If an extension for python is written in C, usually the extension will be
available in binary form. As the porting from unix to windows takes some
effort, an extension needs testing on windows anyway. So unless you develop
extensions yourself, you don't need a compiler at all.

> On Linux, I've installed and used/compiled products in a variety of
> languages in which I've never written a single line of source code
> myself.  In most cases the process works fairly well.  When it doesn't,
> I'm forced to fiddle with nitty gritty details about which I'd rather
> remain ignorant.  The result is usually a good deal of frustration and
> anger on my part.

> On Windows, most users are used to installing precompiled binary
> packages, rather than compiling from source.  When you do have to
> compile from source, it often requires you to fiddle with nitty gritty
> details about which you'd rather remain ignorant.  The less fiddling
> required, the happier the user will be, and the easier it will be for
> that product to get adopted on that platform.  No psychic abilities are
> required.  No Python abilities are required, either, for that matter.
> ;-)

We're not talking end users here. If you have a product developed, you can
ship that - including binary parts compiled for windows.

If I recall your earlier post correctly, you wanted to use qt-x11 under
windows. So you want to use a piece of software which explicitely is not
supposed to run under windows - as there is a commercial version available
for windows. While I can understand the desire to have GPL version of Qt
for windows (which will become reality with qt4), I can't avoid to think
that you chose a deliberately rough path to follow. So there you are. If
you want things easy, pay for a msvc compiler + qt windows version. Then
things will be pretty straightforward. As others (including me) have stated
before: windows is a commercial product. You have to pay to use it, and you
have to pay to develop for it. That's the way MS wants it. The alternatives
are there - but you can't have your cake and eat it.

-- 
Regards,

Diez B. Roggisch


From cdieterich at geosci.uchicago.edu  Wed Feb  2 22:35:53 2005
From: cdieterich at geosci.uchicago.edu (Christian Dieterich)
Date: Wed, 2 Feb 2005 21:35:53 -0600
Subject: Reinstall python 2.3 on OSX 10.3.5?
In-Reply-To: <1107388080.703032.116150@g14g2000cwa.googlegroups.com>
Message-ID: <B51D311C-7594-11D9-AA01-000A9582377C@geosci.uchicago.edu>

On D? C?adaoin, Feabh 2, 2005, at 17:48 America/Chicago, 
moa at extrapolation.com wrote:

> Hi there
>
> I started a very long and roundabout process of attempting to install
> python 2.3.4 along side my apple-installed 2.3 system. To make a long
> story short, I have completely confabulated my environment ( i deleted
> the 2.3 binaries and so forth from the system in an attempt to start
> things fresh), and now I cannot figure out how to reinstall the base
> 2.3 Apple python distribution.
> Can somebody please point me in the right direction?

You could use
fink install python
which makes you a Python installation under /sw.

Christian



From steven.bethard at gmail.com  Fri Feb  4 11:45:01 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 04 Feb 2005 09:45:01 -0700
Subject: Possible additions to the standard library? (WAS: About standard
 library improvement)
In-Reply-To: <mailman.1863.1107489145.22381.python-list@python.org>
References: <WorldClient-F200502031432.AA32333857@tesla.cujae.edu.cu>
	<mailman.1863.1107489145.22381.python-list@python.org>
Message-ID: <baadnfYp3sIWO57fRVn-rg@comcast.com>

Daniel Bickett wrote:
> |    def setreplace( self , set ):
> |        """
> |        Do multiple replaces at once, using dictionary `set' as a legend,
> |        where each instance of each key is to be replaced with that key's
> |        value.
> |        """
> |        if type( set ) == dict:
> |            result = self.__str__()
> |            for key, value in set.iteritems():
> |                if type( key ) == str and type( key ) == str:
> |                    result = result.replace( key , value )
> |                else:
> |                    raise TypeError, "All items of parameter set must
> be strings"
> |            return result
> |        else:
> |            raise TypeError, "Parameter set must be a dictionary"

Yeah, the type-checking is probably not the way to go.  If you want to 
give useful error messages, use try/except statements, e.g.:

py> def setreplace(self, mapping):
...     result = self
...     try:
...         keys = iter(mapping)
...     except TypeError:
...         raise TypeError('first argument to setreplace must '
...                         'be mapping')
...     for key in keys:
...         try:
...             value = mapping[key]
...         except TypeError:
...             raise TypeError('first argument to setreplace must '
...                             'be mapping')
...         try:
...             result = result.replace(key, value)
...         except TypeError:
...             raise TypeError('mapping items must be strings')
...     return result
...

Note that also, instead of iteritems, I use the mapping protocol.  This 
means users of your class can supply any mapping type.

Of course, the str object is written in C, so if you want this added to 
Python standard, you'll need to write a patch using the C API...

> |    def reverse( self ):
> |        """
> |        Return a reversed copy of string.
> |        """
> |        string = [ x for x in self.__str__() ]
> |        string.reverse()
> |        return ''.join( string )

Simpler version for Python 2.4:

py> def reverse(self):
...     return ''.join(reversed(self))
...

Simpler version for Python < 2.4:

py> def reverse(self):
...     lst = list(self)
...     lst.reverse()
...     return ''.join(lst)
...

Note that you shouldn't need to invoke self.__str__ to iterate -- just 
use self.  And the list comprehension:

     [x for x in y]

can generally be reduced to:

     list(y)



As far as usefulness is concerned, I would most likely make use of 
str.setreplace (though I'd perhaps prefer a name like 'mappingreplace'), 
but I probably wouldn't have much of a use for str.reverse.  Of course, 
YMMV.

Steve


From nemesis at nowhere.invalid  Thu Feb  3 15:26:38 2005
From: nemesis at nowhere.invalid (Nemesis)
Date: Thu, 03 Feb 2005 20:26:38 GMT
Subject: Finding user's home dir
References: <5i9rtc.rq31.ln@orion.homeinvalid>
	<mailman.1800.1107419518.22381.python-list@python.org>
Message-ID: <s1pttc.1q11.ln@orion.homeinvalid>

Mentre io pensavo ad una intro simpatica "Miki Tebeka" scriveva:

>> Hi all, I'm trying to write a multiplatform function that tries to
>> return the actual user home directory.
>> ...
> What's wrong with:
>     from user import home
> which does about what your code does.

On my Win2000 box it returns "%USERPROFILE%". That's no surprise because
if you look at the code it try to use os.environ["HOME"] (as
os.path.expanduser() does). And on my Win2000 system this information
points to "%USERPROFILE%" field (I don't know why, I'm not the
administrator of that machine).

-- 
Reality is for people who can't face science fiction.
 
 |\ |       |HomePage   : http://nem01.altervista.org
 | \|emesis |XPN (my nr): http://xpn.altervista.org



From kashmira_v_phalak at yahoo.com  Tue Feb 22 05:55:14 2005
From: kashmira_v_phalak at yahoo.com (clementine)
Date: Tue, 22 Feb 2005 05:55:14 -0500
Subject: Problem with the sort() function
References: <64827323f7134aea810788b3ec6cf516@localhost.talkaboutprogramming.com>
	<mailman.2928.1109066131.22381.python-list@python.org>
Message-ID: <7204a5f80386fadd1afa4bc2509be849@localhost.talkaboutprogramming.com>

Thanx Nick...I forgot to mention im using python 2.2 and along with a host
of other things it doesnt seem to have the enumarate built in function
:(:(:(...is it possible to replace it by something else? I dont think
simulating it will be feasible....



From chrisks at NOSPAM.udel.edu  Mon Feb  7 00:05:08 2005
From: chrisks at NOSPAM.udel.edu (Chris S.)
Date: Mon, 07 Feb 2005 05:05:08 GMT
Subject: Memory Allocation?
Message-ID: <8GCNd.9880$ya6.9761@trndny01>

Is it possible to determine how much memory is allocated by an arbitrary 
Python object? There doesn't seem to be anything in the docs about this, 
but considering that Python manages memory allocation, why would such a 
module be more difficult to design than say, the GC?


From lbates at syscononline.com  Mon Feb 21 20:41:52 2005
From: lbates at syscononline.com (Larry Bates)
Date: Mon, 21 Feb 2005 19:41:52 -0600
Subject: A few q's on python files.
In-Reply-To: <mailman.2907.1109030036.22381.python-list@python.org>
References: <mailman.2907.1109030036.22381.python-list@python.org>
Message-ID: <yO2dnYFuhNJDEIffRVn-sQ@comcast.com>

On windows there's py2exe which packs a python program
so that it can be distributed "like" and .exe, but Python
is a bytecode language (a la Java) so it is never actually
compiled into machine language.  The .pyc files are the
bytecode that is actually executed.  For C programmers
this takes some getting accustomed to.

Larry Bates

Joseph Quigley wrote:
> hiya,
> i'm new to python (by a week) but am learning fast (that's what I like
> about python--it's simplicity). I got disgusted with C and C++ (i was
> learning) probably because of a bad copy of Visual C++ 6.0 that gave me
> errors.
> 
> I noticed that IDLE doesn't have an option to allow you to convert a .py
> or pyc. file into an executable. Why? Am i wrong? Where can I find one
> (if I'm right)?
> 


From gmane-schpam at joefrancia.com  Wed Feb  9 14:54:10 2005
From: gmane-schpam at joefrancia.com (Joe Francia)
Date: Wed, 09 Feb 2005 14:54:10 -0500
Subject: Python and version control
In-Reply-To: <XNrOd.1657$Mw3.72@amstwist00>
References: <XNrOd.1657$Mw3.72@amstwist00>
Message-ID: <cudpm2$tta$1@sea.gmane.org>

Carl wrote:
> Dear friends,
> 
> What is the ultimate version control tool for Python if you are working in a
> Windows environment? 
> 
> When you work on a Visual C++ project then it's easy, use Visual Source Safe
> for your source code! But when it comes to large Python projects and no
> universal Python IDE with version control integration is available,
> checking in and out files is not as simple. I am a keen user of Emacs, but
> version control, which is very simple when you are in a Linux environment,
> for example, is not a straightforward in Windows.
> 
> What is the most common adopted approach among Python developers working in
> a Windows environment? 
> 
> Carl
> 

I don't know that you'll find a common approach.  I use Subversion for 
version control.  For larger projects, I use Eclipse with the Pydev 
plugin for editing, and the Subclipse plugin for talking to Subversion. 
  For smaller things, I usually just edit with SciTE and use the 
TortoiseSVN Explorer extension or the command-line utilities for 
checkins and updates.

Peace,
Joe



From bvdeenen at xs-four-all.nl.invalid  Wed Feb 23 13:57:33 2005
From: bvdeenen at xs-four-all.nl.invalid (Bart van Deenen)
Date: Wed, 23 Feb 2005 19:57:33 +0100
Subject: Don't understand global variables between modules
References: <4219ba1f$0$162$e4fe514c@dreader14.news.xs4all.nl>
	<mailman.2887.1108982912.22381.python-list@python.org>
Message-ID: <1gsgclv.5vh64iat4ry8N%bvdeenen@xs-four-all.nl.invalid>

Fredrik Lundh <fredrik at pythonware.com> wrote:

> because running a script isn't the same thing as importing it.  try adding
> "print __name__" lines before your other print statements so you can see
> who's printing what.
> 
> > Is there more than one global space?
> 
> in this case, there are more module namespaces than you think.
> this page might help (especially the "Using Modules as Scripts" section):
>     http://effbot.org/zone/import-confusion.htm

Thanks for your answer, and also thanks for effbot. Lots of good tips. 

Bart


From grante at visi.com  Wed Feb  9 18:27:55 2005
From: grante at visi.com (Grant Edwards)
Date: 09 Feb 2005 23:27:55 GMT
Subject: negative integer division
References: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
	<42096EAD.879E8A5F@yahoo.com> <86wtti76cp.fsf@guru.mired.org>
	<420A916C.94F7F175@yahoo.com> <420a9513$0$29477$a1866201@visi.com>
	<420A98C7.103157A@yahoo.com>
Message-ID: <420a9c7b$0$21598$a1866201@visi.com>

On 2005-02-09, Jive Dadson <jdadson at yahoo.com> wrote:

>>>> [C] isn't - it's a portable assembler.
>>>
>>> I've heard that many times, but it makes no sense to me.
>> 
>> I think the point is that C is a low-level, hardware twiddling
>> language to be used by people writing things like kernel code --
>
> And Python interpreters?

No. That's my point.  C isn't a good language in which to write
user applications such as a Python language.  One uses C when
the other choice is assembly, not when the other choice is
"real" high level language like Python, or Modula-3, or
Smalltalk, or whatever.

>> The fact that C ended up in the rather inappropriate role of
>> a user-land application language is different problem.
>
> In the early 80's, either C was the "appropriate language" or
> there was none ... and that's coming from someone who wrote a
> commercial Pascal compiler, runtime support, and debugger. I
> did it all in C. Pascal, as we all know, was ill-conceived.

I never thought so.  I did embedded systems development using
Pascal and quite enjoyed it.  Later when Pascal waned and C
waxed, I thought C was a definite step backwards.  I thought
Modula-2 and Modula-3 were both good languages as well.  

> C++ was a momentous advance,

Now C++ _was_ ill-conceived.  It's more of an agglomeration of
features than Perl.  And dangerous to boot: at least Perl tries
to protect you from memory leaks and stray pointers.

> but it intensionally inherited many of C's warts.

And added a bunch of it's own.

This is pretty much completely off-topic now.  :)

-- 
Grant Edwards                   grante             Yow!  I'm definitely not
                                  at               in Omaha!
                               visi.com            


From steven.bethard at gmail.com  Fri Feb  4 11:56:09 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 04 Feb 2005 09:56:09 -0700
Subject: Computing class variable on demand?
In-Reply-To: <1107501071.325170.168620@z14g2000cwz.googlegroups.com>
References: <1107410898.260491.203090@l41g2000cwc.googlegroups.com>
	<6eydnSAjiuofW5zfRVn-sw@comcast.com>
	<1107445682.239962.284660@o13g2000cwo.googlegroups.com>
	<mY2dnU6Tjq1e-5_fRVn-hg@comcast.com>
	<1107501071.325170.168620@z14g2000cwz.googlegroups.com>
Message-ID: <YfCdnf0-fb26NJ7fRVn-3g@comcast.com>

fortepianissimo wrote:
> Thank you so much about this useful tip! I learned the new decorator
> feature of 2.4 simply because of your post.
> 
> Unfortunately I don't have luxury right now to run Python 2.4 (for what
> I'm doing anyways). You mentioned the way to do decorator in 2.3. Still
> I have a question here. Here is Scott David Daniels's code for lazy
> initialization:
> 
> class Lazy (object):
>     def __init__ (self, calculate_function):
>         self._calculate = calculate_function
> 
>     def __get__ (self, obj, _=None):
>         if obj is None:
>             return self
>         value = self._calculate(obj)
>         setattr(obj, self._calculate.func_name, value)
>         return value
> 
> The problem I run into using this for *instance* variables is: the
> setattr() call won't work with a class with __slots__ defined - it
> simply produces error that the attribute we want to modify is
> read-only. Is there a workaround of this problem?

Sounds like you're declaring the class variables in your __slots__ too. 
  Is this true?  I don't think that's necessary -- __slots__ is only for 
used for instances.  So, for example, this code should work okay:

py> class Foo(object):
...     __slots__ = ['baz']
...     class __metaclass__(type):
...         def bar(self):
...             print 'slow initialization'
...             return 'apple'
...         bar = LazyAttribute(bar)
...     def __init__(self, baz):
...         self.baz = baz
...
py> f = Foo(1)
py> f.baz
1
py> f.bar
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
AttributeError: 'Foo' object has no attribute 'bar'
py> f.__class__.bar
slow initialization
'apple'
py> Foo.bar
'apple'

Note that if you want to reference the class variable, you have to 
specficially go through the class, instead of counting on the instance 
lookup as classes without __slots__ can.  But as long as you don't 
declare 'bar' as a slot, you should still be able to access Foo.bar.

Note that you probably don't want to have 'bar' as both a class variable 
and an instance variable -- then the instance variable will just hide 
the class variable...

HTH,

Steve


From rkern at ucsd.edu  Mon Feb 14 19:15:40 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 14 Feb 2005 16:15:40 -0800
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cuq5du$k7g$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq1he$cd7$1@news1.ucsd.edu>
	<cuq5du$k7g$1@usenet.otenet.gr>
Message-ID: <curevc$p6r$1@news1.ucsd.edu>

Ilias Lazaridis wrote:
> Robert Kern wrote:
> 
>> Ilias Lazaridis wrote:
>>
>>> Robert Kern wrote:
>>
>> [snip]
>>
>>>> The answer to most of your questions is, "Because no one has yet 
>>>> volunteered their time and effort to get the job done."
>>>
>>>
>>> this answer do not fit in most questions.
>>>
>>> please review them again.
>>
>>
>> Against my better judgement, I have.
>>
>> It certainly fits a, b, and c. It also fits d if you place an implicit 
>> "Yes, " in front of the answer. 4/6. I stick with my assessment.
> 
> 
> see below.
> 
> [...]
> 
>>> I ask some questions and suggest some things.
>>>
>>> Voluntarlily and without beeing paid.
>>
>>
>> Questions and suggestions are don't count for much in this community. 
>> Code and well-written patches do.
>>
>> Stop wasting time on c.l.py and get to work! If you can't do that, 
>> then this is not the community you are looking for.
> 
> 
> Please speak for yourself.

I think that my participation in the community for the past six years 
and a rational examination of the responses you have received so far 
qualify me, just a little bit, to conclude that this community does not 
tolerate your kind of behaviour well.

If you want one that does so tolerate your behaviour, you need to keep 
looking.

>>> There are many commercial systems around python.
>>
>>
>> And yet there is not one company that has someone devoted full-time to 
>> developing Python. Not even Guido. 
> 
> 
> Who's "Guido"?

The guy who wrote Python originally and is still the head developer.

>> Most of core-Python development happens in people's spare, unpaid time.
>>
>> Volunteerism is the core of this community. Trust me.
> 
> 
> even if:
> 
> Volunteerism does not exclude Professionalism.

Volunteerism does not, indeed, exclude professionalism. However, being 
professional does not entail satisfying the desires of everyone who 
asks. Being professional does not mean that volunteerism is not the 
driving force of this community.

If this does not appeal to you, then this is not the community that you 
are looking for.

>>> So please stop this volunteerism-stuff.
>>
>>
>> No. You are asking others to volunteer their time, or perhaps, 
>> alternately, the PSF and other businesses to volunteer their money to 
>> fund people's time to satisfy *your* wants. I am asking you to 
>> volunteer *your* time to satisfy *your* wants, 
> 
> 
> I'm already doing this.

Okay, let me clarify: I am asking you to volunteer your time with 
something that is going to be productive. Continuing here on c.l.py as 
you have been will not be productive. I've seen dozens of people who act 
like you do come in to this newsgroup and leave again unsatisfied.

>> or alternately, stop writing questionnaires and bothering us.
> 
> 
> Feel free to ignore the threads.

I would have been more than happy to until my web page was used. Now I 
feel some obligation to correct some things.

> And please speak for yourself.

I am speaking as a member of this community, not necessarily for this 
community. But I do have some experience with how this community behaves 
and how it responds to people who behave like you do. I know that they 
do not mix well at all.

If you want a community that does tolerate this behaviour, you need to 
keep looking.

>> Note that this reaction is pretty specific to you and not to other 
>> newcomers. Most newcomers do not carry around a sense of entitlement 
>> that could flatten a small village. Thus, they are treated with 
>> respect and helpfulness. We would appreciate it if you would emulate 
>> these people. On a purely pragmatic note, you have to admit that they 
>> are getting much better help than you are.
> 
> 
> I get the help that I want.

You could do it much more efficiently. And in a way that does not 
generate the obvious ill-will that you have generated. This thread 
*could* have been completely technical and addressed your real concerns 
quite quickly. However, you have acted in a way that *invites* the 
accusation of trolling, that immediately disinclines people to help you, 
that ruins your credibility here.

You *can* act differently, and we *will* respond better.

If you don't want to act differently, then your interaction with this 
community will continue to be counterproductive, and I would advise you 
to look for some other community that is more responsive.

>>> If you like to help me and other newcomers, please give me simple 
>>> some answers on the initial questions.
>>
>>
>> I did provide some answers. Please review them again.
> 
> 
> Please have the gentleness [against me and the current/future readers] 
> to answer within the context of the original writings.

I will be more careful in the future.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From john at grulic.org.ar  Mon Feb  7 09:49:35 2005
From: john at grulic.org.ar (John Lenton)
Date: Mon, 7 Feb 2005 11:49:35 -0300
Subject: Confused with methods
In-Reply-To: <1grmd4z.1tlm4e61650vedN%aleaxit@yahoo.com>
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>
	<slrnd0enor.26q.apardon@rcpc42.vub.ac.be>
	<1grmd4z.1tlm4e61650vedN%aleaxit@yahoo.com>
Message-ID: <20050207144935.GA15714@grulic.org.ar>

On Mon, Feb 07, 2005 at 03:24:11PM +0100, Alex Martelli wrote:
>                                                 def always produces a
> function object and binds it to the name coming after keyword 'def'.
> Any such function object, no matter how produced and how bound hither
> and thither, always behaves in exactly the same way.

This isn't exactly true:

    >>> class C(object):
    ...   def __new__(*a): pass
    ... 
    >>> C.__new__
    <function __new__ at 0x40088d4c>
    >>> class D(object): pass
    ... 
    >>> def __new__(*a): pass
    ... 
    >>> D.__new__ = __new__
    >>> D.__new__
    <unbound method D.__new__>

of course, __new__ is special-cased (*some*body should've read "import
this", especially the part "explicit is better than implicit").

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
Al fre?r ser? el re?r. 
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From fredrik at pythonware.com  Wed Feb 16 01:59:55 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 16 Feb 2005 07:59:55 +0100
Subject: super not working in __del__  ?
References: <cuu0pu$t44$1@sea.gmane.org>
Message-ID: <cuuqrr$f1o$1@sea.gmane.org>

Christopher J. Bottaro wrote:

>I get this exception when I run the following code:
>
> Exception exceptions.TypeError: 'super() argument 1 must be type, not None'
> in <bound method Txrposdn.__del__ of <__main__.Txrposdn object at
> 0xf6f7118c>> ignored

reading the documentation never hurts:

    http://docs.python.org/ref/customization.html

    "Warning: Due to the precarious circumstances under which __del__()
    methods are invoked, exceptions that occur during their execution are
    ignored, and a warning is printed to sys.stderr instead. Also, when
    __del__() is invoked in response to a module being deleted (e.g.,
    when execution of the program is done), other globals referenced by
    the __del__() method may already have been deleted. For this
    reason, __del__() methods should do the absolute minimum needed
    to maintain external invariants."

in this case,

  def __del__(self):
    super(self.__class__, self).__del__()

should do the trick.

in other cases, you may have to store references to important globals to class
or instance variables, or in bound arguments:

  def __del__(self, name=name):
    name(...)

or you could just wrap the cleanup in a try/except clause, since this only happens
when the interpreter is shutting down.

for cleanup details, see:

    http://www.python.org/doc/essays/cleanup.html

</F> 





From http  Thu Feb  3 22:27:25 2005
From: http (Paul Rubin)
Date: 03 Feb 2005 19:27:25 -0800
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<opslnkqsjo6yt6e7@news.cisco.com>
Message-ID: <7xhdktt36q.fsf@ruckus.brouhaha.com>

aurora <aurora00 at gmail.com> writes:
> Slow compares to what? For a large commerical site with bigger budget,
> better infrastructure, better implementation, it is not surprising
> that  they come out ahead compares to hobbyist sites.

Hmm, as mentioned, I'm not sure what the commercial sites do that's
different.  I take the view that the free software world is capable of
anything that the commercial world is capable of, so I'm not awed just
because a site is commercial.  And sites like Slashdot have pretty big
budgets by hobbyist standards.

> Putting implementation aside, is LAMP inherently performing worst than
> commerical alternatives like IIS, ColdFusion, Sun ONE or DB2? Sounds
> like  that's your perposition.

I wouldn't say that.  I don't think Apache is a bottleneck compared
with other web servers.  Similarly I don't see an inherent reason for
Python (or whatever) to be seriously slower than Java servlets.  I
have heard that MySQL doesn't handle concurrent updates nearly as well
as DB2 or Oracle, or for that matter PostgreSQL, so I wonder if busier
LAMP sites might benefit from switching to PostgreSQL (LAMP => LAPP?).

> I don't know if there is any number to support this perposition. Note
> that  many largest site have open source components in them. Google,
> Amazon,  Yahoo all run on unix variants. Ebay is the notable
> exception, which uses  IIS. Can you really say ebay is performing
> better that amazon (or vice  versa)?

I don't know how much the OS matters.  I don't know how much the web
server matters.  My suspicion is that the big resource sink is the SQL
server.  But I'm wondering what people more experienced than I am say
about this.  Google certainly doesn't use SQL for its web search index.

> I think the chief factor that a site performing poorly is in the
> implementation. It is really easy to throw big money into expensive
> software and hardware and come out with a performance dog. Google's
> infrastructure relies on a large distributed network of commodity
> hardware, not a few expensive boxes. LAMP based infrastructure, if
> used  right, can support the most demanding applications.

Google sure doesn't use LAMP!  I've heard that when you enter a Google
query, about sixty different computers work on it.  The search index
is distributed all over the place and they use a supercomputer-like
interconnect strategy (but based on commodity ethernet switches) to
move stuff around between the processors.


From nospam at me.invalid  Sat Feb 26 21:08:38 2005
From: nospam at me.invalid (anthonyberet)
Date: Sun, 27 Feb 2005 02:08:38 +0000
Subject: string methods (warning, newbie)
In-Reply-To: <38co9sF5lgss3U1@individual.net>
References: <38co9sF5lgss3U1@individual.net>
Message-ID: <38cod3F5lgss3U2@individual.net>

anthonyberet wrote:
> Is there a string mething [method] to return only the alpha characters of a string?
> eg 'The Beatles - help - 03 - Ticket to ride', would be 
> 'TheBeatlesTickettoride' 
> 
erm, no it wouldn't, it would be 'TheBeatleshelpTickettoride', but you 
get me, I am sure.

> If not then how best to approach this?
> I have some complicated plan to cut the string into individual 
> characters and then concatenate a new string with the ones that return 
> true with the .isalpha string method.
> 
> Is there an easier way?


From R.Brodie at rl.ac.uk  Fri Feb  4 05:57:38 2005
From: R.Brodie at rl.ac.uk (Richard Brodie)
Date: Fri, 4 Feb 2005 10:57:38 -0000
Subject: [Fwd: [gnu.org #220719] Re: python and gpl]
References: <mailman.1861.1107484943.22381.python-list@python.org>
Message-ID: <ctvkf2$853$1@blackmamba.itd.rl.ac.uk>


"Tim Churches" <tchur at optushome.com.au> wrote in message
news:mailman.1861.1107484943.22381.python-list at python.org...

> 1) In Australia and Europe at least, loading program code from disc into memory in
> order to execute it is not considered as making an infringing copy under copyright law.

I don't think it's as clear cut as that. Sony won their modchip case in Britain
for exactly that reason. They lost in Australia and elsewhere in Europe.




From http  Tue Feb 22 08:57:37 2005
From: http (Paul Rubin)
Date: 22 Feb 2005 05:57:37 -0800
Subject: Sequence of empty lists
References: <ICBCFo.LG3@bath.ac.uk>
Message-ID: <7xoeecd7e6.fsf@ruckus.brouhaha.com>

ccjpb at shark.cse.bris.ac.uk (JP. Baker) writes:
> How *should* I create a sequence of N empty lists (buckets)?

a = [[] for i in xrange(N)]


From onurb at xiludom.gro  Fri Feb 11 09:10:41 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Fri, 11 Feb 2005 15:10:41 +0100
Subject: Python v.s. c++
In-Reply-To: <mailman.2331.1108060722.22381.python-list@python.org>
References: <mailman.2331.1108060722.22381.python-list@python.org>
Message-ID: <420cbce2$0$535$626a14ce@news.free.fr>

xiaobin yang wrote:
> Hi,  if i am already skillful with c++.  Is it useful to learn python? thanks!

Q : If I'm already skillfull with driving a big truck, is it useful to 
learn driving a motorcycle?

(tip : Have you ever tried driving a big truck in a big city at rush 
hour?-)

-- 
bruno desthuilliers
ruby -e "print 'onurb at xiludom.gro'.split('@').collect{|p| 
p.split('.').collect{|w| w.reverse}.join('.')}.join('@')"
--


From ptmcg at austin.rr.com  Wed Feb 23 03:21:29 2005
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 23 Feb 2005 00:21:29 -0800
Subject: which parser to use
References: <87ll9hmdd6.fsf@subopt.house-net>
Message-ID: <1109146889.913740.239100@z14g2000cwz.googlegroups.com>

a_nuther at geek.org wrote:
> I'm building something that requires parsing a rather complex
> language. I'd like to do the whole application, including the
> lex/parse phase, in Python (for development/debug speed), and only
> move parts of it to a compiled language if execution speed absolutely
> dictates. So, what i'm looking for in a Python parser is:
>
>     1) reliability (don't want to debug a parser)
>     1) flexibility (i do a lot of refactoring)
>     2) E/BNF friendliness (working from a spec)
>     3) speed (moderate speed will do; glacial won't)
>
> Does anyone have any familiarity with some of the several Python
> parsers out there? Any pointers to comparisons (as opposed to
surveys)
> of _several_ of the Python parsers would be much appereciated. (I've
> seen the YAPPS/Spark comparison.) If none of the Python parsers
really
> fit the bill, any thoughts on ANTLR, Spirit, etc?
>
> Thanks in advance,
> E

Depending on just *how* complex your EBNF is, pyparsing may be
suitable.  It has been used for Verilog, DOT, TeX, and agent language
parsing.  Pyparsing is a "combinator", in which you assemble the
grammar using expression objects such as Literal, Word, OneOrMore,
etc., all in pure Python code - no separate lex/yacc syntax, or code
generation/synchronization steps.  It *may* be somewhat slow for your
purposes, but I find the grammars to be readable and easily maintained
and extended.

Download pyparsing at http://pyparsing.sourceforge.net.

-- Paul



From gandalf at geochemsource.com  Tue Feb  8 07:42:32 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Tue, 08 Feb 2005 13:42:32 +0100
Subject: User Identification
In-Reply-To: <slrnd0hc3d.1pq.rparnes@debian.localdomain>
References: <slrnd0hc3d.1pq.rparnes@debian.localdomain>
Message-ID: <4208B3B8.3000003@geochemsource.com>

Bob Parnes wrote:

>I have a python program on a server of an all-linux network. It needs to 
>record the user name running it. Is there a way for the program to extract
>the name from the system without a separate log-in dialog?
>
>Bob Parnes
>
>  
>
What about:

import os
username = os.getlogin()

Please see other functions at:

http://docs.python.org/lib/os-procinfo.html

Best,

   Laci 2.0



-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From dbickett at gmail.com  Thu Feb  3 17:28:50 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Thu, 3 Feb 2005 17:28:50 -0500
Subject: bytecode obfuscation
In-Reply-To: <1f060c4c05020313268582f6d@mail.gmail.com>
References: <1f060c4c05020313268582f6d@mail.gmail.com>
Message-ID: <1d6cdae3050203142816be07df@mail.gmail.com>

snacktime wrote:
> How difficult is it to turn python bytecode into it's original source?
>  Is it that much different than java (this is what they will probably
> compare it to) ?

As far as I know, that depends on how much money you're willing to
pour into it ;)

http://www.crazy-compilers.com/decompyle/

Other than that link, which I stumbled upon at some point (at
python-eggs), I'm decidedly uninformed on this subject.

-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From mhartl at post.harvard.edu  Sat Feb  5 17:11:07 2005
From: mhartl at post.harvard.edu (Michael Hartl)
Date: 5 Feb 2005 14:11:07 -0800
Subject: How do I convert arithemtic string (like "2+2") to a number?
In-Reply-To: <mailman.1996.1107640917.22381.python-list@python.org>
References: <mailman.1996.1107640917.22381.python-list@python.org>
Message-ID: <1107641467.104883.177850@c13g2000cwb.googlegroups.com>

Use the eval function:

>>> eval("30/(6+9)")
2

Michael



From michele.simionato at gmail.com  Thu Feb  3 01:37:34 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 2 Feb 2005 22:37:34 -0800
Subject: Popularizing SimpleHTTPServer and CGIHTTPServer
Message-ID: <1107412654.121488.157070@c13g2000cwb.googlegroups.com>

Just submitted a recipe with this goal in mind:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/365606
Michele Simionato



From mwm at mired.org  Tue Feb 22 01:58:43 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 22 Feb 2005 00:58:43 -0600
Subject: [Fwd: Re: [Uuu-devel] languages] <-- Why Python
References: <mailman.2781.1108677768.22381.python-list@python.org>
	<1108678805.542584.171930@z14g2000cwz.googlegroups.com>
	<mailman.2783.1108679758.22381.python-list@python.org>
	<864qgaisoq.fsf@guru.mired.org>
	<mailman.2785.1108689484.22381.python-list@python.org>
	<86vf8qhcql.fsf@guru.mired.org>
	<mailman.2787.1108691319.22381.python-list@python.org>
	<86r7jdh5vw.fsf@guru.mired.org>
	<mailman.2852.1108869628.22381.python-list@python.org>
	<86fyzqh3xb.fsf@guru.mired.org> <du7k6p2uy31.fsf@lehtori.cc.tut.fi>
Message-ID: <86y8dhf5cs.fsf@guru.mired.org>

Ville Vainio <ville at spammers.com> writes:

>>>>>> "Mike" == Mike Meyer <mwm at mired.org> writes:
>
>     Mike> IPython's pysh seems a little clumsy for interactive use, as
>     Mike> it requires special characters to distinguish between
>     Mike> commands to be passed to the shell and commands to be passed
>     Mike> to the scripting language. This should be contrasted with
>
> What do you mean by "the commands to be passed to the shell"? Commands
> on the path (the normal situation in Unix) can be executed directly
> just like in bash et al. Ditto for "magic" functions if "automagic" is
> on.

Ok, I missed that. My bad.
>
>     Mike> I'll say it again - if you're arguing about which language
>     Mike> to use, you're arguing about the wrong thing.
>
> In a sense C is the native language of Unix and Windows (system calls
> are in C). It might make sense to expose the OS as Python objects.

Ugh. It would make more sense to expose it as (say) CORBA objects, so
you aren't tied to a specific language. Following the Plan 9 approach
and exposing it as a file system would probably require more work, but
would allow more flexibility. Then again, both approaches get you into
a recursion when you start trying to expose the facilities that are
used by the exposing infrastructure.

      <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From no at spam.invalid  Thu Feb  3 15:41:19 2005
From: no at spam.invalid (Russell E. Owen)
Date: Thu, 03 Feb 2005 12:41:19 -0800
Subject: Reinstall python 2.3 on OSX 10.3.5?
References: <1107388080.703032.116150@g14g2000cwa.googlegroups.com>
Message-ID: <ctu29f$4i1$1@gnus01.u.washington.edu>

In article <1107388080.703032.116150 at g14g2000cwa.googlegroups.com>,
 moa at extrapolation.com wrote:

>Hi there
>
>I started a very long and roundabout process of attempting to install
>python 2.3.4 along side my apple-installed 2.3 system. To make a long
>story short, I have completely confabulated my environment ( i deleted
>the 2.3 binaries and so forth from the system in an attempt to start
>things fresh), and now I cannot figure out how to reinstall the base
>2.3 Apple python distribution.
>Can somebody please point me in the right direction?

Archive and Install of the operating system is the safest.

But if you have some kind a backup or know somebody with a similar Mac, 
you could try reinstalling /System/Library/Frameworks/Python.framework. 
You'd have to do this in a way that preserved ownership and permissions.
That would probably still leave a few unresolved symbolic links and/or 
aliases lying around, but is worth a try (especially if you can examine 
that system and see where the links go). In particular 
"/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/s
ite-packages" points to "/Library/Python/2.3" and /usr/bin/python and 
/usr/bin/pythonw point somewhere useful.

But...archive and install is really the safest and it's a chance to 
clean up a bit of cruft. (But it messes with /usr/local and your web 
site, so back all that up first).

-- Russell

P.S. I installed a separate unix/x11 Python 2.4 in /usr/local with no 
problem using the default install process. However, I wanted X11 Tk 
support for that, so I first:
- moved the aqua Tk (in /Library/Frameworks/Tk.framework, and 
Tcl.framework) so the installers could not find them
- installed unix/x11 tcl and tk (again using the default install process)
This results in a perfectly workable python that uses the X11 Tk stuff.

It's a minor headache having two pythons -- every package has to be 
installed twice if you want it available in both pythons.


From fumanchu at amor.org  Thu Feb 17 13:42:48 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Thu, 17 Feb 2005 10:42:48 -0800
Subject: Calling a function from module question.
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E339845D@exchange.hqamor.amorhq.net>

JRCondon wrote:
> Sean, if you are asking what I think you are asking (I don't 
> think name hiding is the issue), you can use
> 
> from module_name import *

Sssssshh! We're obviously going to great lengths to not tell him about
*.

;)


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org


From michele.simionato at gmail.com  Fri Feb  4 05:45:34 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 4 Feb 2005 02:45:34 -0800
Subject: making symlinks with distutils
Message-ID: <1107513934.428944.257820@z14g2000cwz.googlegroups.com>

I want to distribute a pure Python package with this structure:

>    mypackage
>         __init__.py
>         module1.py
>         module2.py
>         ...
>         myexecutable.py

In particular, myexecutable.py is a script which is intended to be used
from the command line via the shebang trick. I want to distribute on
Unices.
and I want a symlink

/usr/bin/myexecutable -> <package-path>/mypackage/myexecutable.py

to be made at installation time, when the user runs "python setup.py
install".

What is the recommanded way to do that? Do I need a postinstallation
script or something like that?

I could do that in various way, but I don't see the obvious one,
maybe because I am not a Dutch ;)


         Michele Simionato



From breamoreboy at aol.com  Sun Feb 20 20:26:19 2005
From: breamoreboy at aol.com (Mark Lawrence)
Date: 20 Feb 2005 17:26:19 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <878y5i9ayp.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr>
	<42185b05$0$15460$9b622d9e@news.freenet.de>
	<cv9sdo$69n$3@usenet.otenet.gr>
	<42189527$0$6260$9b622d9e@news.freenet.de>
	<cvadcj$mqc$1@usenet.otenet.gr>
	<mailman.2866.1108917759.22381.python-list@python.org>
	<cvafgu$2lk$1@usenet.otenet.gr>
	<4218cafe$0$8790$9b622d9e@news.freenet.de>
	<1108922969.140196.304380@z14g2000cwz.googlegroups.com>
	<878y5i9ayp.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
Message-ID: <1108949179.015323.273580@c13g2000cwb.googlegroups.com>


Nick Vargish wrote:
> "BrainDead" <breamoreboy at aol.com> writes:
>
> > I believe that you are wasting your time.  Looking at your email
> > address, this may well be relevant.
>   [ 4-line URL snipped ]
>
> Thanks for the historical reference. Please consider a visit to
> tinyurl.com before posting a monster like that... :^)
>
> Nick
>
> --
> #  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this
to a python
> print reduce(lambda x,y:x+chr(ord(y)-1),'
Ojdl!Wbshjti!=obwAcboefstobudi/psh?')

Nick,

Sorry about that, forgot to engage brain before doing cut and paste.
At least I can learn, unlike some well known people.:)

Regards.

Mark Lawrence.



From bobby.owens at ntlworld.com  Sun Feb  6 16:42:22 2005
From: bobby.owens at ntlworld.com (Bobby Owens)
Date: 6 Feb 2005 13:42:22 -0800
Subject: New to unix/python. How to install
Message-ID: <ea314a5f.0502061342.489708e8@posting.google.com>

Hi,

Please excuse what is probably a completely newbie question, but my
situation is as follows.

I'm a windows/.NET developer but have now been asked to take over part
of the project which is written in python and runs on Unix.

I've muddled through the python code and figured out parts of it. I've
now installed Sun Solaris 10 on a VM ware installation successfully
and can muddle thorough the basics of the o/s. I cant figure out how
to install python. From looking online I've found what I think I need:

- python-2.3.3-sol9-intel-local
- libgcc-3.3-sol10-intel-local

I know the python looks like from only v9 of solaris but it was within
a sol10 package I found online.

>From what I understand, I need the "libgcc" to compile the python
intstall. I cant figure out how to install them both however. Could
any kind souls please lend a hand. It would be much appreciated.

Either post here or pm me.

Regards

Bobby
bobby.owens at ntlworld.com


From m at m.com  Tue Feb  8 16:02:31 2005
From: m at m.com (m)
Date: Tue, 08 Feb 2005 15:02:31 -0600
Subject: Python versus Perl ?
In-Reply-To: <opslwvc2wx1js0xs@news.telkomsa.net>
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
	<hkhc01dnpmmhn980quijqil40653qipdki@4ax.com>
	<cuavn1$bag$1@nntp.msstate.edu>
	<opslwvc2wx1js0xs@news.telkomsa.net>
Message-ID: <cub9d9$ikj$1@nntp.msstate.edu>

<snip>
You really will have to convince people here that execution speed is a
> real issue for your programming task (in order to continue this  
> discussion).  Otherwise the debate will go south real quick.
> 
> Keep well
> Caleb
> 
> 
> On Tue, 08 Feb 2005 12:17:05 -0600, m <m at m.com> wrote:
> 
>> Courageous wrote:
>>
>>>
>>>> If Python is better than Perl, I'm curious how really significant
>>>> those advantages are ?
>>
>>
>> speedwise, i think perl is faster than python and python performed 
>> the  slowest as shown in http://www.flat222.org/mac/bench/
> 
> 

i have nothing else to add. thanks caleb!


From steven.bethard at gmail.com  Fri Feb  4 15:13:08 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 04 Feb 2005 13:13:08 -0700
Subject: returning True, False or None
In-Reply-To: <mailman.1914.1107547292.22381.python-list@python.org>
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com><5OOMd.12446$W16.3365@trndny07>	<5sydnV6im6jgJp7fRVn-qQ@comcast.com>
	<mailman.1914.1107547292.22381.python-list@python.org>
Message-ID: <CN-dndOnZabPSp7fRVn-2w@comcast.com>

Fredrik Lundh wrote:
> Steven Bethard wrote:
>> Raymond Hettinger wrote: 
>>>
>>> return max(lst)
>>
>> Very clever!  Thanks!
> 
> too clever.  boolean > None isn't guaranteed by the language specification:

Yup.  I thought about mentioning that for anyone who wasn't involved in 
the previous thread discussing this behavior, but I was too lazy.  ;) 
Thanks for pointing it out again.

This implementation detail was added in Python 2.1a1, with the following 
note[1]:

"The outcome of comparing non-numeric objects of different types is
not defined by the language, other than that it's arbitrary but
consistent (see the Reference Manual).  An implementation detail changed
in 2.1a1 such that None now compares less than any other object.  Code
relying on this new behavior (like code that relied on the previous
behavior) does so at its own risk."

Steve

[1] http://www.python.org/2.1/NEWS.txt


From sylvain.thenault at logilab.fr  Fri Feb  4 07:43:05 2005
From: sylvain.thenault at logilab.fr (Sylvain Thenault)
Date: Fri, 04 Feb 2005 13:43:05 +0100
Subject: making symlinks with distutils
References: <1107513934.428944.257820@z14g2000cwz.googlegroups.com>
	<pan.2005.02.04.10.59.14.434381@logilab.fr>
	<1107518485.557475.312410@c13g2000cwb.googlegroups.com>
Message-ID: <pan.2005.02.04.12.43.05.772727@logilab.fr>

On Fri, 04 Feb 2005 04:01:25 -0800, Michele Simionato wrote:

>>From what I see in the docs, registering a script just normalize the
> shebang line, but does not install it in /usr/bin, nor make any symbolic
> links, so it is not what I am looking for.

Actually it does install it is $PREFIX/bin.

-- 
Sylvain Th?nault                               LOGILAB, Paris (France).

http://www.logilab.com   http://www.logilab.fr  http://www.logilab.org




From xnews2 at fredp.lautre.net  Wed Feb 16 17:51:49 2005
From: xnews2 at fredp.lautre.net (Fred Pacquier)
Date: 16 Feb 2005 22:51:49 GMT
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
Message-ID: <Xns95FFF321AD909PaCmAnRDLM@212.27.42.70>

KirbyBase sounds like something that could fit the bill.


From vincent at visualtrans.de  Wed Feb  9 08:20:54 2005
From: vincent at visualtrans.de (Vincent Wehren)
Date: Wed, 09 Feb 2005 14:20:54 +0100
Subject: Trouble with the encoding of os.getcwd() in Korean Windows
In-Reply-To: <1107953764.478501.176650@c13g2000cwb.googlegroups.com>
References: <1107953764.478501.176650@c13g2000cwb.googlegroups.com>
Message-ID: <cud2nj$det$1@news6.zwoll1.ov.home.nl>

Erik Bethke wrote:
> Hello All,
> 
> I have found much help in the google archives but I am still stuck...
> 
> here is my code snippet:
> 	path = os.getcwd()
>         path = path.decode('UTF8')
> 
> Now the trouble is I am getting that darn UnicodeDecodeError, where it
> is tripping up on the Korean hangul for My Desktop.  Now I have tried
> utf8 and utf16 and neither of these works.


> 
> So is this my question?:  What encoding does windows use for Korean
> Windows?  

Try "mbcs". This is a built-in encoding avalaible only on Windows and 
that equals the system's default ANSI codepage. Using "mbcs", which is 
short for "multi-byte character set", the conversions to and from 
Unicode (decode/encode) are internally handled by the corresponding 
win32 api functions.

--
Vincent Wehren

I thought it might be and so I surfed around
> (http://foundationstone.com.au/HtmlSupport/OnlineHelp/Localisation/SupportedEncodings.html)
> and there appears to be an encoding called: windows-949 labeled to be
> Korean Windows, which of couse is *not* one of the encodings to be
> found in the encodings package... which would suck.
> 
> But then I thought about it some more, how could you make software to
> do things like read the current directory work on different language
> machines???  It would be madness to have a try statement for each and
> every encoding under the sun...
> 
> Why isn't there a get system encoding method?
> 
> Or am I on the entirely wrong track?
> 
> Thanks,
> -Erik
> 


From ilias at lazaridis.com  Mon Feb 21 10:38:19 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Mon, 21 Feb 2005 17:38:19 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <874qg6937w.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
References: <cuo71l$gig$1@usenet.otenet.gr> <cvaoft$av6$1@usenet.otenet.gr>
	<874qg6937w.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
Message-ID: <cvcv9b$nbm$1@usenet.otenet.gr>

Nick Vargish wrote:
> Ilias Lazaridis <ilias at lazaridis.com> writes:
> 
>> Now it's really time to close this thread.
> 
> I suspect this will fall of deaf ears, but I have to mention that you
>  do not get to "close threads" on Usenet.

this is obvious.

> You can excuse yourself from this one and stop replying to comments,
> but you don't get to unilaterally declare a discussion over.
[...]

The discussion is over.

At least the in-topic one.

Everything else is babbling, hairsplitting, playing an AI which does not 
understand writings and all this unproductive garbage.

The Essence is this one, as stated before:

"
Summarized Suggestions for the Python Team, PSF, Community):

-
-
-

An automated-build-process-system should allow community-members to add 
their targets (e.g. MinGW) into an special "incubation section", which 
does not in any way affect the "main section" (which contains the 
official production targets, e.g. MSVC).

If an "incubation section" target proves over time as stable and 
supported (by community contributions), it is moved to the 
"official-auto-build".

-


The python-team should
  * detect any efforts made within the community to support different 
build-targets
  * attract/engourage the authors/teams to include the patches/sources 
into the main build-system
  * attract/engourage the authors/teams to have open projects with an 
collaboration infrastructure.

-

The python-community and the PSF should support the python-team to 
fulfill the above tasks, thus the python-teams effort is limited to 
provide the infrastructure (incubation-build-targets).

-
-
-

Practical example:

Engourage the current pyMinGW project to become a open collaborative 
project:

http://jove.prohosting.com/iwave/ipython/pyMinGW.html

   * as a first step, setup a pyMinGW mailinglist
     * intrested people can come together an communicate
   * as a second step, setup an SVN
     * intrested projects could get your patch via SVN
   * as a third step, find intrested contributors
     * which would help testing
     * which would help you with coding

The python-team setups a build-target, which the collaborative pyMinGW 
project tries to make valid.

-
-
-

Now it's really time to close this thread.

.
"

.

-- 
http://lazaridis.com


From irmen.NOSPAM at xs4all.nl  Sat Feb 12 17:12:01 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sat, 12 Feb 2005 23:12:01 +0100
Subject: multi threading in multi processor (computer)
In-Reply-To: <7xr7jlwieq.fsf@ruckus.brouhaha.com>
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<420a2938$0$22987$626a14ce@news.free.fr>
	<1107964587.818199.223980@g14g2000cwa.googlegroups.com>
	<mailman.2254.1107966236.22381.python-list@python.org>
	<7xr7jlwieq.fsf@ruckus.brouhaha.com>
Message-ID: <420e7ee4$0$28976$e4fe514c@news.xs4all.nl>

Paul Rubin wrote:
> John Lenton <john at grulic.org.ar> writes:
> 
>>and buying more, cheap computers gives you more processing power than
>>buying less, multi-processor computers. 
> 
> 
> The day is coming when even cheap computers have multiple cpu's.
> See hyperthreading and the coming multi-core P4's, and the finally
> announced Cell processor.
> 
> Conclusion: the GIL must die.

I think I agree with this.
And I couldn't resist:
http://www.razorvine.net/img/GIL.jpg

;-)

--Irmen


From hardieca at hotmail.com  Sun Feb 13 17:48:34 2005
From: hardieca at hotmail.com (hardieca at hotmail.com)
Date: 13 Feb 2005 14:48:34 -0800
Subject: Pythonic poker client
Message-ID: <1108334914.029293.14830@o13g2000cwo.googlegroups.com>

Hi all,

My PC finally went belly up last week and I'm looking forward to
playing with my new Mac. However, I play a bit of online poker, and
there is no Mac client for my poker room.

Ideally, instead of running Virtual PC, I'd much rather build a custom
poker client with Python. It's an idea I've been kicking around for a
while, as it would let me create logs and better analyze my playing.
I'm hoping it would also help me improve my Python coding skills.

I've mostly done web development, so I'm a little out of my element
here, but I would certainly appreciate any help someone could offer.
How would one go about porting a client like this?

I'm assuming that I need to figure out the port it uses, find the
server, analyze the packets for commands, and then build an app that
masquerades as the real client.

Anyone have any experience with this?

Many thanks!

Chris



From lesmou at hotmail.com  Sun Feb 20 23:14:14 2005
From: lesmou at hotmail.com (les)
Date: Mon, 21 Feb 2005 15:14:14 +1100
Subject: Python/Rexx Interface Now Available
Message-ID: <42196000$0$5190$afc38c87@news.optusnet.com.au>

A Python Rexx Interface is now available to allow Python scripting to access
REXX libraries and utilities.
See http://www.lestec.com.au for details

Regards,
Les




From steve at holdenweb.com  Thu Feb  3 07:45:22 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 03 Feb 2005 07:45:22 -0500
Subject: Awkwardness of C API for making tuples
In-Reply-To: <mailman.1799.1107417054.22381.python-list@python.org>
References: <dave.opstad-E4D4C4.07281701022005@reader0900.news.uu.net><1107289261.185768.116790@f14g2000cwb.googlegroups.com>	<pRhMd.6933$i6.60496@nasal.pacific.net.au>
	<mailman.1799.1107417054.22381.python-list@python.org>
Message-ID: <M6pMd.102686$Jk5.100791@lakeread01>

Fredrik Lundh wrote:

> Dave Cole wrote:
> 
> 
>>    for (i = 0; i < num_values; i++) {
>>PyObject *obj;
>>
>>obj = PyInt_FromLong(value[i]);
>>if (obj == NULL
>>            || PyTuple_SetItem(tuple, i, obj) != 0) {
>>    Py_DECREF(tuple);
>>    return NULL;
>>}
>>    }
> 
> 
> in theory, if PyInt_FromLong succeeds, and PyTuple_SetItem fails, you'll leak
> an object.
> 
> </F> 
> 
> 
> 
And in practice this will only happen during a period when you are 
relying critically on it *not* to ...

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From john at grulic.org.ar  Wed Feb 16 23:58:13 2005
From: john at grulic.org.ar (John Lenton)
Date: Thu, 17 Feb 2005 01:58:13 -0300
Subject: low-end persistence strategies?
In-Reply-To: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
Message-ID: <20050217045813.GB12437@grulic.org.ar>

On Tue, Feb 15, 2005 at 06:57:47PM -0800, Paul Rubin wrote:
> I've started a few threads before on object persistence in medium to
> high end server apps.  This one is about low end apps, for example, a
> simple cgi on a personal web site that might get a dozen hits a day.
> The idea is you just want to keep a few pieces of data around that the
> cgi can update.
> 
> Immediately, typical strategies like using a MySQL database become too
> big a pain.  Any kind of compiled and installed 3rd party module (e.g.
> Metakit) is also too big a pain.  But there still has to be some kind
> of concurrency strategy, even if it's something like crude file
> locking, or else two people running the cgi simultaneously can wipe
> out the data store.  But you don't want crashing the app to leave a
> lock around if you can help it.
> 
> Anyway, something like dbm or shelve coupled with flock-style file
> locking and a version of dbmopen that automatically retries after 1
> second if the file is locked would do the job nicely, plus there could
> be a cleanup mechanism for detecting stale locks.
> 
> Is there a standard approach to something like that, or should I just
> code it the obvious way?

one easy way would be something along the lines of

    from ConfigParser import ConfigParser
    from fcntl import flock, LOCK_SH, LOCK_EX, LOCK_UN

    class LockedParser(ConfigParser):
        def _read(self, fp, fpname):
            flock(fp, LOCK_SH) # block until can read
            try:
                rv = super(LockedParser, self)._read(fp, fpname)
            finally:
                flock(fp, LOCK_UN)
            return rv

        def write(self, fp):
            flock(fp, LOCK_EX) # block until can write
            try:
                rv = super(LockedParser, self).write(fp)
            finally:
                flock(fp, LOCK_UN)
            return rv

although you could do the same kind of stuff with csv, or even
Pickle. Of course this doesn't work if what you're wanting to
implement is a hit counter, but that is much easier: just grab a
LOCK_EX, read in, write out, LOCK_UN. If you care about (not)
overwriting changes, but fear you'll hold the lock for too long with
the simple 'grab the lock and run' approach, you could save a version
of the original file and compare before writing out. Complexity grows
a lot, and you suddenly would be better off using pybsddb or somesuch.

Of course I'm probably overlooking something, because it really can't
be this easy, can it?

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
BOFH excuse #44:

bank holiday - system operating credits  not recharged
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From bearophileHUGS at lycos.com  Fri Feb 18 18:09:54 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 18 Feb 2005 15:09:54 -0800
Subject: Graph
Message-ID: <1108768194.065544.297680@l41g2000cwc.googlegroups.com>

This is the first version of the graph module I was developing... In
the meantime I've seen that there are already lots of graph
implementations, even a compiled one:
ftp://xray.imsb.au.dk/pub/python/packages/Python2.1/RPMS/python-kjbuckets-2.2-7.i686.rpm
(This makes my work less important, but it also tells me that "many"
people can appreciate a graph data structure module.)

Raymond Hettinger recently told me:
> Start by posting a module outside the standard library; gathering
user
> feedback; and, if popular, propose it for inclusion in the standard
library.

I think my module will never become popular, but I show it here
anyway...
More algorithms can surely be added. It uses a lot of memory, but its
speed seems good enough for me. It used few collected parts (like the
dijkstra module). A testing module can be added. This is my first
"serious" program in Python, so comments are appreciated.
The zip can be found here for some time:
http://www.fantascienza.net/animalia/graph.zip
Psyco and MatPlotLib are optional.

Bear hugs,
Bearophile



From baas at ira.uka.de  Tue Feb  1 15:26:04 2005
From: baas at ira.uka.de (Matthias Baas)
Date: Tue, 01 Feb 2005 21:26:04 +0100
Subject: msvcp71.dll and Python 2.4 C++ extensions
References: <gk2tv0pbal8jd1qpaoj2hd5b5pq1esecaa@4ax.com>
	<41FEBBD6.4010402@v.loewis.de>
Message-ID: <6snvv0pj0bdjhvvsvqkmj52hmmbi6kap0p@4ax.com>

On Tue, 01 Feb 2005 00:14:30 +0100, "Martin v. L?wis"
<martin at v.loewis.de> wrote:
>> are there any guidelines about what to do if a Windows extension for
>> Python 2.4  requires the C++ runtime (msvcp71.dll)? 
>
>No; it should "just work fine". [...]

I fully agree with that. :) And that was actually the reason why I
posted here, because in my case it did not just work fine...

>> It doesn't
>> sound like a good idea to me if every package places another copy of
>> this dll somewhere in the Python directory.
>
>Why not? If your installer follows Windows logo compliance rules, it
>should check whether the DLL is already present; if it is, it should
>check whether the version installed is newer than the one it would
>install, and if so, should skip installation.

I'm creating the installer via the distutils by calling "setup.py
bdist_wininst". How can I configure distutils to have it create an
installer that does the above things?

How should an installer check if a DLL is already present? Are DLLs
registered with Windows so I can query a database? Or should the
installer search for the DLL in the directories specified in the PATH
variable and see if the DLL is there?
And what's the preferred location for such a DLL? Should it be placed
in a local directory that only belongs to the package or in a
directory where other C++ extension packages might also be able to use
it? But where would this be then? The Windows system directory seems
to be discouraged by Microsoft:

"An application should use and redistribute msvcr71.dll, and it should
avoid placing a copy or using an existing copy of msvcr71.dll in the
system directory. Instead, the application should keep a copy of
msvcr71.dll in its application directory with the program executable."
(see
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_crt_c_run.2d.time_libraries.asp)
I suppose the same applies for msvcp71.dll.

>> Python 2.4 does install the C runtime (msvcr71.dll) in the Windows
>> system32 directory, doesn't it?
>
>It depends. If this is an allusers installation, it does so. For a
>per-user installation, the user might not have sufficient privileges
>to install into system32, so the installer won't install it there.

Ah, ok. And yes, I did a "all users" installation.

>> (btw, shouldn't this be installed in
>> the Python directory instead?)
>
>No. If you install the DLL into the Python directory, Python
>will not work anymore because python24.dll (installed into system32)
>will not find this DLL. If you then also move python24.dll into
>the Python directory, COM components that require python24.dll will
>fail to run.

ok, I see.

>> So would it be possible that future
>> Python releases would also install the C++ runtime? 
>
>Why should it? Nothing in the Python distribution requires C++.

Well, yes, I know. But I don't see Python as a standalone application.
One of the great things about Python is that there are so many
extension modules for every kinds of purposes. So, making available
the C++ runtime would just pave the way for more of those extension
modules by making it easier to distribute binary packages that are
implemented in C++.

>> I think it's
>> better if the dll would only be installed once by Python instead of
>> several times by every extension that uses C++.
>
>Why is that better? The DLL versioning rules, and the shared DLL
>refcounting mechanisms will make sure that the installation works
>just fine.

I was referring to the possibility that the DLL might get installed
several times at several different locations which would be a waste of
disk space. If there's only one file, then I agree with the above
(however, what happens if I uninstall one package and this package
removes the DLL even when there are other packages installed that
still require the DLL?).

>> Currently, I do not package the C++ runtime and leave it up to the
>> user to install the dll if it isn't already somewhere on his system.
>> But this really is not a satisfying solution...
>
>Then you should probably include the DLL, or rewrite your extension
>to not use C++.

I'm afraid the latter will hardly ever be an option... ;)

For one smaller package I was compiling I solved the problem by
linking against the static versions of the C/C++ runtime. This will
also satisfy the "It-Should-Just-Work" constraint... :)  (however,
there still could be situations where this is not possible (the
sources might not be available, for example)).

- Matthias -



From amonje_avon at hotmail.com  Fri Feb 25 23:21:01 2005
From: amonje_avon at hotmail.com (amonje_avon at hotmail.com)
Date: 25 Feb 2005 20:21:01 -0800
Subject: It's worth a Try!
Message-ID: <1109391660.983619.301100@o13g2000cwo.googlegroups.com>

Please read and believe: Turn $6 into $60,000 in 90 days,
GUARANTEED
I found this in a news group and decided to try
it. A little while back,
I was browsing through news groups, just like you
are now and came
across a message just like this, that said you
could make thousands of
dollars within weeks with only an initial
investment of $6.00!!!
So I thought yeah right, this must be a scam!!!
But like most of us, I
was curious, so I kept reading. Anyway, it said
that you send $1.00 to
each of the 6 names and addresses stated in the
message. You then place
your own name and address at the bottom of the
list at #6 and post the
message in at least 200 news groups. (There are
thousands). No catch,
that was it.
So after thinking it over, and talking to a few
people first. I thought
about trying it. I figured, what have I got to
lose except 6 stamps and
$6.00, right? So I invested the measly $6.00!!!
Guess what? Within 7
days I started getting money in the mail!!! I was
shocked!!! I figured
it would end soon, but the money just kept coming
in!!! In my first
week, I had made about $25.00. By the end of the
second week, I had made
a total of over $1,000.00!!! In the third week, I
had over $10,000.00
and it is still growing!!! This is now my fourth
week and I have made a
total of just over $42,000.00 and it is still
coming in rapidly!!! It's
certainly worth $6.00 and 6 stamps!!! I have
spent more than that on the
Lottery!!!
Let me tell you how this works and most
importantly, why it works!!!
Also, make sure you
print a copy of this message now. So you can get
the information off of
it as you need it. I promise you that if you
follow the directions
exactly, that you will start making more money
than you thought possible
by doing something so easy!!!
Suggestion: Read this entire message carefully!!!
(Print it out or
download it.) Follow the simple directions and
watch the money come
in!!! It's easy!!! It's legal!!! Your investment
is only $6.00 (plus
postage).
IMPORTANT: This is not a rip-off!!! It is not
illegal!!! ? It is almost entirely risk free and
it really works!!! If
all of the following instructions are adhered to,
you will receive
extraordinary dividends!!!
Please note: Follow these directions EXACTLY, and
$60,000.00 or more can
be yours in 20 to 90 days!!! This program remains
successful because of
the honesty and the integrity of the
participants!!! Please continue its
success by carefully adhering to the
instructions.

Here are the 4 easy steps to success:
Step 1: Get 6 separate pieces of paper and write
the following on each
piece of paper.
PLEASE PUT ME ON YOUR MAILING LIST
Now get 6 U.S. dollar bills and place ONE inside
each of the 6 pieces of
paper so the bills will not be seen through the
envelopes (to prevent
mail theft). Next, place one paper in each of the
6 envelopes and seal
them, you should now have 6 sealed envelopes.
Each with a piece of paper
stating the above phrase, your name and address,
and a $1.00 bill.
THIS IS ABSOLUTELY LEGAL!!! YOU ARE REQUESTING A
LEGITIMATE SERVICE AND
YOU ARE PAYING FOR IT!!!
Like most of us, I was a little skeptical and a
little worried about the
legal aspect of it all. So I checked it out with
the U.S. Postal Service
and they confirmed that it is indeed legal!!!
Mail the 6 envelopes to the following addresses:



J.J Maxey
355 N. Manila Ave.
Fresno, CA 93727
USA

Kyle Pate
P.o. Box 2046
Great Falls, MT 59403-2046
USA

D Tyrrell
501 CR 219
Melrose, FL 32666
USA

G.GIBSON
905 S.JENNINGS AVE.2307
FT.WORTH,TX.76104
USA

W.M Alexander
P.O Box 702552
Dallas, TX 75370
USA

A.Monje
8536-24 Avenue
Edmonton, AB T6K3C8
Canada

Step 2: Now take the #1 name off the list that
you see above, move the
other names up (6 becomes 5, 5 becomes 4, etc.)
and add your name as
number 6 on the list.
Step 3: Change anything you need to, but try to
keep this message as
close to what you see as possible. Now, post your
amended message to at
least 200 news groups. I think there are close to
24,000 groups!!! All
you need is 200, but remember, the more you post,
the more money you
make!!! This is perfectly legal!! If you have any
doubts, refer to
Title18 sec. 1302 & 1341 of the postal lottery
laws. Keep a copy of
these steps for yourself and whenever you need
money, you can use it
again.
Please remember that this program remains
successful because of the
honesty and the integrity of the participants and
by their carefully
adhering to the directions!!!
Look at it this way. If you are of integrity, the
program will continue
and the money that so many others have received
will come your way!!!
Note: it might be a
good Idea to wrap the $1 bills in dark paper to
reduce the risk of mail
theft.
So, as each post is downloaded and the directions
carefully followed,
six members will be reimbursed for their
participation as a list
developer with one dollar each. Your name will
move up the list
geometrically so that when your name reaches the
#1 position, you will
be receiving thousands of dollars in cash!!! What
an opportunity for
only $6.00!!! ($1.00
for each of the first six people listed above).
Send it now, add your own name to the list and
your in business!!!
DIRECTIONS FOR HOW TO POST TO A NEWS GROUP!!!
Step 1: You do not need to re-type this entire
message to do your own
posting. Simply put your cursor at the beginning
of this message and
drag your cursor to the bottom of this message
and select copy from the
edit menu. This will copy the entire message into
the computer memory.
Step 2: Open a blank note pad file and place your
cursor at the top of
the blank page. From
the edit menu select paste. This will paste a
copy of the message into
notepad so that you
can add your name to the list.
Step 3: Save your new notepad file as a txt file.
If you want to do your
posting in a different setting, you'll always
have this file to go back
to.
Step 4: Use Netscape or Internet Explorer and try
searching for various
news groups (on-line forums, message boards, chat
sites, discussions,
etc.)
Step 5: Visit these message boards and post this
message as a new
message by highlighting the text of this message
from your notepad and
selecting paste from the edit menu. Fill in the
subject, this will be
the header that everybody sees as they scroll
through the list of
postings in a particular group. Click the post
message button. You've
done your first one! Congratulations!!! All You
have to do is jump to
different news groups and post away, after you
get the hang of it, it
will take about 30 seconds for each news group!
REMEMBER, THE MORE NEWS GROUPS YOU POST IN, THE
MORE MONEY YOU WILL
MAKE!!!! (But you have to post a minimum of 200).
That's it!!! You will begin receiving money from
around the world within
days!!! You may eventually want to rent a P.O.
Box due to the large
amount of mail you will receive. If you
wish to stay anonymous, you can invent a name to
use, as long as the
postman will deliver it.
JUST MAKE SURE ALL THE ADDRESSES ARE CORRECT!!!
Now the why part. Out of 200 postings, say you
receive only 5 replies (a
very low example). So then you made $5.00 with
your name at #6 on the
letter. Now, each of the 5 persons who sent you
$1.00 make the minimum
200 postings, each with your name at #5 and only
5 persons respond to
each of the original 5, that is another $25.00
for you. Now those 25
each make 200 MINIMUM posts with your name at #4
and only 5 replies
each, you will bring in an additional $125.00!!!!
Now, those 125 persons
turn around and post the minimum 200 with your
name at #3 and only
receive 5 replies each, you will make an
additional $625.00!!! OK, now
here is the fun part, each of those 625 persons
post a minimum 200
messages with your name at #2 and they each only
receive 5 replies, that
just made you $3,125.00!!! Those 3,125 persons
will all deliver this
message to 200 news groups, If just 5 more reply
you will receive
$15,625.00!!! All with an original investment of
only $6.00!!! Amazing
isn't it!!!! When your name is no longer on the
list, you just take the
latest posting in the news groups and send out
another $6.00 to the
names on the list, putting your name at number 6
again.
You must realize that thousands of people all
over the world are joining
the internet and reading these messages every
day!!! Just like you are
now!!! So, can you afford $6.00 and see if it
really works? I'm glad I
did!!! People have said, "what if the plan is
played out and no one
sends you the money?" So what!!! What are the
chances of that happening,
when there are tons of new honest users and new
honest people who are
joining the internet and news groups everyday and
are willing to give it
a try? Estimates are at 20,000 to 50,000 new
users, every day!!!
REMEMBER PLAY HONESTLY AND FAIRLY AND THIS WILL
REALLY WORK!!!



From hehe at re.de  Wed Feb 23 15:06:22 2005
From: hehe at re.de (Jacques Daussy)
Date: Wed, 23 Feb 2005 21:06:22 +0100
Subject: Communication between JAVA and python
Message-ID: <421ce234$0$12950$626a14ce@news.free.fr>

Hello
How can I transfert information between a JAVA application and a python 
script application. I can't use jython because, I must use python 
interpreter.I think to socket or semaphore, but can I use it on Windows 
plateform ?

thanks a lot

jack 




From simoninusa2001 at yahoo.co.uk  Wed Feb  9 21:44:31 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 9 Feb 2005 18:44:31 -0800
Subject: PyQt and Python 2.4 - also WinXP LnF?
Message-ID: <1108003471.242829.297030@o13g2000cwo.googlegroups.com>

After quite a while of wxPython I'm getting back into PyQt, mainly due
to the announcement by Trolltech that they will make a GPL version of
Qt4 for Windows (and Phil-T said he will make a PyQt to go with it
eventually!)

I'm currently using PyQt 3.12 that comes with the BlackAdder demo, it
seems to work fine with Python 2.3.5 except that it doesn't support the
WinXP look'n'feel, the QStyle "WindowsXP" isn't included, and using a
manifest file doesn't seem to fix this.

Does anyone know if the latest PyQt (3.13?) is built with this support?
I thought this had been supported since 3.10 or earlier, is it just the
BlackAdder build that's "broken"?

I'm writing an XMMS remote control program, so it will be GPL when
released (if it's ever good enough to release!) so I'm looking at
buying the commercial PyQt3 or BlackAdder whilst waiting for the GPL
PyQt4

Can I use the commercial PyQt without a commercial Qt - I guess I could
as long as I don't distribute the qt-mt333.dll? I have no use for Qt
itself, not interested in C++, so it seems a bit much to have to buy a
license just for a DLL!

Also, would I have to build it all myself or does Riverbank/TheKompany
provide binaries like PyQt 3.13 for Python 2.4, as I don't have Visual
Studio I can't build it myself.

OK, I'm off to check on my build of PyQt on my Fedora2/Python 2.4
machine ;-)



From ncoghlan at iinet.net.au  Sun Feb 13 20:31:11 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Mon, 14 Feb 2005 11:31:11 +1000
Subject: For American numbers
In-Reply-To: <86zmy85dig.fsf@guru.mired.org>
References: <420e7376$1@nntp0.pdx.net>
	<gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>	<mailman.2474.1108266888.22381.python-list@python.org>
	<86zmy85dig.fsf@guru.mired.org>
Message-ID: <420FFF5F.8000406@iinet.net.au>

Mike Meyer wrote:
>>From what I found <URL: http://physics.nist.gov/cuu/Units/binary.html
> 
>>, it's not clear those are ISO prefixes yet - but they have been
> 
> adapted by some standards agencies. 
> 
> Possibly you have better references?

My mistake - IEC, not ISO :)

And I did get one wrong in my sample code - it's 'exbi' not 'ebi':
http://en.wikipedia.org/wiki/Binary_prefix#IEC_standard_prefixes

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From jerf at jerf.org  Thu Feb  3 14:25:15 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 03 Feb 2005 14:25:15 -0500
Subject: Awkwardness of C API for making tuples
References: <dave.opstad-E4D4C4.07281701022005@reader0900.news.uu.net>
	<1107289261.185768.116790@f14g2000cwb.googlegroups.com>
	<pRhMd.6933$i6.60496@nasal.pacific.net.au>
	<mailman.1799.1107417054.22381.python-list@python.org>
	<M6pMd.102686$Jk5.100791@lakeread01>
Message-ID: <pan.2005.02.03.19.25.14.118316@jerf.org>

On Thu, 03 Feb 2005 07:45:22 -0500, Steve Holden wrote:

> Fredrik Lundh wrote:
>> in theory, if PyInt_FromLong succeeds, and PyTuple_SetItem fails, you'll leak
>> an object.
>> 
>> </F> 
>> 
> And in practice this will only happen during a period when you are 
> relying critically on it *not* to ...

One of the steps to attaining the Tao of Programming is to entirely stop
caring what happens when your program runs, thus completely eliminating
this class of bugs. A programmer who has the Tao never critically relies
on a program, and thus the program, knowing that it can not spite the
programmer in this way, does not try.



*.5-wink* - I meant it as a joke but as I thought about it it started to
make sense, especially the first clause of the last sentence, which I
suppose means the Tao may actually be speaking through me without my
knowledge or intent...


From cdieterich at geosci.uchicago.edu  Fri Feb 11 00:31:27 2005
From: cdieterich at geosci.uchicago.edu (Christian Dieterich)
Date: Thu, 10 Feb 2005 23:31:27 -0600
Subject: Python-libnjb on macosx
In-Reply-To: <cugt16$p1t$1@news1.ucsd.edu>
Message-ID: <2D56F081-7BEE-11D9-8405-000A9582377C@geosci.uchicago.edu>

On D?ardaoin, Feabh 10, 2005, at 18:08 America/Chicago, Robert Kern 
wrote:

> Timothy Grant wrote:
>> I was working on some things that use Glenn Strong's excellent libnjb
>> wrapper on my Linux box. I have since bought a PowerBook and have been
>> trying to get everything working correctly under OS/X.
>> This morning I got Python-libnjb to build without errors using the
>> following command:
>> ld -dynamic -dylib -L/sw/lib -L/sw/lib/python2.3/config njb_c_wrap.o
>> -o _njb_c.dylib -lpython2.3 -lnjb -lSystem -framework IOKit -ldylib1.o
>
> Try to write a distutils setup.py script. It should take care of the 
> correct linker arguments for you.

I (distutils) usually include

-bundle -flat_namespace -undefined suppress

to build .so files. Maybe this helps in your case too. But the setup.py 
is definitively the safer way.

Christian



From timr at probo.com  Sun Feb 27 02:49:26 2005
From: timr at probo.com (Tim Roberts)
Date: Sat, 26 Feb 2005 23:49:26 -0800
Subject: Is it possible to pass a parameter by reference?
References: <mailman.3112.1109480634.22381.python-list@python.org>
Message-ID: <ult221lrij88e6p82u81gk4a0bobhoi6hm@4ax.com>

Anthony Liu <antonyliu2002 at yahoo.com> wrote:
>
>I defined two functions, f1 and f2.  
>
>f1 modifies the value of a variable called apple.
>
>I want to pass the modified value of apple to f2.
>
>How can I do this?  I got stuck.

It depends on the data type.  Essentially, all objects are passed by
reference.  However, some objects can be modified, and some cannot.  Lists
can, strings and tuples cannot.

This is one of the most important thing to understand about Python, in my
opinion.  There is a fundamental separation between an object and whatever
names it is known by.

Here's an example:

   def xxx(yyy):
      yyy[1] = 3

   zzz = [ 0, 1, 2 ]
   xxx(zzz)

After this code runs, zzz will be [0,3,2].  Note that, while xxx is
running, the list that was created as [0,1,2] has two names.

However, this code will fail within xxx, because the string cannot be
modified:
   aaa = "abcde"
   xxx(aaa)

However, watch this:

   def xxx(yyy):        # 0
      yyy = [ 3, 4, 5]  # 1

   zzz = [ 0, 1, 2 ]    # 2
   xxx(zzz)             # 3

After this runs, zzz will still be [0,1,2].  At line 2, a list object is
created containing [0,1,2].  The variable name zzz is bound to that list.
When we get to lines 3 and 0, the variable name yyy within function xxx is
bound to that exact same object.

However, in line 1, a NEW list object is created, containing [3,4,5].  The
variable yyy is then bound to this NEW object, and its binding to the other
list is lost.  However, the variable zzz is still bound to [0,1,2].

If you need to create a new object and return it to the mainline, do that:

    def xxx(yyy):
        yyy = [ 3, 4, 5 ]
        return yyy

    zzz = [ 0, 1, 2 ]
    zzz = xxx(zzz)
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From petite.abeille at gmail.com  Sun Feb 13 06:28:28 2005
From: petite.abeille at gmail.com (PA)
Date: Sun, 13 Feb 2005 12:28:28 +0100
Subject: SCons build tool speed
In-Reply-To: <zEGPd.159460$K7.151265@news-server.bigpond.net.au>
References: <SBsPd.4406$ZZ.3056@newssvr23.news.prodigy.net>
	<zEGPd.159460$K7.151265@news-server.bigpond.net.au>
Message-ID: <a7e6322a4a891491833cb69d1943176f@gmail.com>


On Feb 13, 2005, at 12:20, Neil Hodgson wrote:

> http://www.scons.org/cgi-bin/wiki/GoFastButton

Out of curiosity, why does scons uses MD5 by default? Is that not, er, 
somewhat heavy handed for most practical purpose?

Would not some sort of lightweight CRC be "good enough" to start with?

http://samba.anu.edu.au/rsync/tech_report/node3.html

Cheers

--
PA, Onnay Equitursay
http://alt.textdrive.com/



From edvard+news at majakari.net  Fri Feb 25 14:31:02 2005
From: edvard+news at majakari.net (Edvard Majakari)
Date: Fri, 25 Feb 2005 21:31:02 +0200
Subject: Unit testing - one test class/method, or test class/class
References: <87y8ddywr9.fsf@titan.staselog.com>
	<111uqqgag7eb253@news.supernews.com>
Message-ID: <87fyzkfnd5.fsf@titan.staselog.com>

"John Roth" <newsgroups at jhrothjr.com> writes:

> I tend to write one test class per class, but that's
> just the way I got started. My feeling is that the
> methods in a test class should tell a story if you
> read the names in the order they were written,
> so I'd split the tests for a class into several
> classes if they had different stories to tell.

Well, that's one of the things I forgot to mention. Often I use

TestSomeClassA:
    # test for normal, legal inputs

TestSomeClassB:
    # test for extreme/border cases, still legal inputs

TestSomeClassC:
    # test cases with illegal input, eg. negative integer when only positive
    # inputs make sense etc.

Just like you said, they tell a bit different story each, so it probably
makes sense to separate those.
   
>
> John Roth
>
> "Edvard Majakari" <edvard+news at majakari.net> wrote in message
> news:87y8ddywr9.fsf at titan.staselog.com...
>>
>> Hi,
>>
>> I just found py.test[1] and converted a large unit test module to py.test
>> format (which is actually almost-no-format-at-all, but I won't get there
>> now). Having 348 test cases in the module and huge test classes, I started
>> to think about splitting classes. Basically you have at least three
>> obvious
>> choises, if you are going for consistency in your test modules:
>>
>> Choise a:
>>
>> Create a single test class for the whole module to be tested, whether it
>> contains multiple classes or not.
>>
>> ...I dont think this method deserves closer inspection. It's probably
>> rather
>> poor method to begin with. With py.test where no subclassing is required
>> (like in Python unittest, where you have to subclass unittest.TestCase)
>> you'd probably be better off with just writing a test method for each
>> class
>> and each class method in the module.
>>
>> Choise b:
>>
>> Create a test class for each class in the module, plus one class for any
>> non-class methods defined in the module.
>>
>> + Feels clean, because each test class is mapped to one class in the
>>   module
>> + It is rather easy to find all tests for given class
>> + Relatively easy to create class skeleton automatically from test module
>>  and the other way round
>>
>> - Test classes get huge easily
>> - Missing test methods are not very easy to find[2]
>> - A test method may depend on other tests in the same class
>>
>> Choise c:
>>
>> Create a test class for each non-class method and class method in the
>> tested
>> module.
>>
>> + Test classes are small, easy to find all tests for given method
>> + Helps in test isolation - having separate test class for single method
>>  makes tested class less dependent of any other methods/classes
>> + Relatively easy to create test module from existing class (but then you
>>  are not doing TDD!) but not vice versa
>>
>> - Large number of classes results in more overhead; more typing, probably
>>  requires subclassing because of common test class setup methods etc.
>>
>> What do you think, any important points I'm missing?
>>
>> Footnotes:
>> [1]  In reality, this is a secret plot to advertise py.test, see
>>     http://codespeak.net/py/current/doc/test.html
>>
>> [2] However, this problem disappears if you start with writing your tests
>>    first: with TDD, you don't have untested methods, because you start by
>>    writing the tests first, and end up with a module that passes the tests
>>
>>
>> --
>> # Edvard Majakari Software Engineer
>> # PGP PUBLIC KEY available    Soli Deo Gloria!
>> One day, when he was naughty, Mr Bunnsy looked over the hedge into Farmer
>> Fred's field and it was full of fresh green lettuces. Mr Bunnsy, however,
>> was
>> not full of lettuces. This did not seem fair.  --Mr Bunnsy has an
>> adventure

-- 
# Edvard Majakari		Software Engineer
# PGP PUBLIC KEY available    	Soli Deo Gloria!

$_ = '456476617264204d616a616b6172692c20612043687269737469616e20'; print
join('',map{chr hex}(split/(\w{2})/)),uc substr(crypt(60281449,'es'),2,4),"\n";


From fredrik at pythonware.com  Tue Feb  8 03:53:47 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 09:53:47 +0100
Subject: Big development in the GUI realm
References: <mailman.2123.1107820051.22381.python-list@python.org><4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com><cu95nd$7cr$1@news1.ucsd.edu><6h7g0113up1v76k7qkad7bt17os1q73510@4ax.com><4208237b$0$21623$a1866201@visi.com>
	<cu98n4$833$1@news1.ucsd.edu><4208373e$0$21620$a1866201@visi.com>
	<cu9eg0$9jb$1@news1.ucsd.edu>
Message-ID: <cu9ujn$452$1@sea.gmane.org>

Robert Kern wrote:

> Believe me, I share your frustration every time this issue comes up. However, I think it's best to 
> follow Robert Heinlein's maxim:
>
>  "Never attribute to malice what can adequately be explained by stupidity."

that's Hanlon, not Heinlein.  to be on the safe side, I won't attempt to
attribute your mistake to anything.

</F> 





From benn at cenix-bioscience.com  Thu Feb  3 05:56:21 2005
From: benn at cenix-bioscience.com (Neil Benn)
Date: Thu, 03 Feb 2005 11:56:21 +0100
Subject: Logging
In-Reply-To: <36dtueF4q3m3gU1@individual.net>
References: <4200BF14.5010408@cenix-bioscience.com>	<mailman.1750.1107345636.22381.python-list@python.org>
	<36dtueF4q3m3gU1@individual.net>
Message-ID: <42020355.3010807@cenix-bioscience.com>

Samuel Kilchenmann wrote:

> "<snip>

>
> .>>> logging._handlers.clear()
> .>>> logging.root.handlers = []
> .>>> for l in logging.Logger.manager.loggerDict.values():
> .>>>     l.handlers = []
> after logging.shutdown() and before getting the new logger, your 
> script will probably run without errors.

<snip>
Hello,

          Yeah, I worked that out after a bit, I solved it by keeping a 
record of all the handlers and then calling flush on the handler 
followed by removeHandler from the logger.  It's a bit of a pain but I'd 
prefer to do that rather than go poking around inside the logging 
package but I will put the cleaning up of the dict on a shutdown() call 
as a feature request for logging.

    Thanks for the comm.

Cheers,

Neil

-- 

Neil Benn
Senior Automation Engineer
Cenix BioScience
BioInnovations Zentrum
Tatzberg 46
D-01307
Dresden
Germany

Tel : +49 (0)351 4173 154
e-mail : benn at cenix-bioscience.com
Cenix Website : http://www.cenix-bioscience.com



From peter at engcorp.com  Mon Feb 28 11:13:24 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 28 Feb 2005 11:13:24 -0500
Subject: String Replace Problem...
In-Reply-To: <mailman.3138.1109605552.22381.python-list@python.org>
References: <mailman.3138.1109605552.22381.python-list@python.org>
Message-ID: <cq2dnfMHAJe-3r7fRVn-hA@powergate.ca>

andrea.gavana at agip.it wrote:
>   'PERMX'  @PERMX1  1 34  1  20  1 6     /
...
>   'PERMX'  @PERMX10  1 34  21 41 29 34    /
...
> 
> I would like to replace all the occurrencies of the "keywords" (beginning
> with the @ (AT) symbol) with some floating point value. As an example, this
> is what I do:
> 
> # Find All Keywords Starting with @ (AT)
> regex = re.compile("[\@]\w+", re.IGNORECASE)

You don't need the [, \ or ] around the "@" as it is
not a special character... (but that's not your problem here).

> keywords = regex.findall(onread)

Here you get a list, in order, of all the matches, including
these: "@PERMX1" and "@PERMX10"

> # Try To Replace The With Floats
> for keys in keywords:
>     onread = string.replace(onread, keys, str(float(pars)))

Here you iterate through the list, replacing *all*
occurrences of each of them, one at a time, in the
full string.

Now imagine what happens to things like "@PERMX10" in the
full string when you are replacing "@PERMX1"....

> Now, I you try to run this little script, you will see that for keywords
> starting from "@PERMX10", the replaced values are WRONG. I don't know why,
> Python replace only the "@PERMX1" leaving out the last char of the keyword
> (that are 0, 1, 2, 3, 4, 5, 6 ). These values are left in the file and I
> don't get the expected result.
> 
> Does anyone have an explanation? What am I doing wrong?

Basically, you are replacing things in the string one by one without
taking into account the fact that some of those things contain
others of those things.

Looking into "re.sub" might help, although in this case you
could solve the problem by doing one of several other things.

The simplest one that comes to mind is to sort the list of
keywords in reverse order by length of string, so that you
replace the longest items first.

-Peter


From me at privacy.net  Tue Feb 22 17:04:26 2005
From: me at privacy.net (Dan Sommers)
Date: 22 Feb 2005 17:04:26 -0500
Subject: how to interrupt time.sleep ?
References: <19k4miq1ddzn9.11addj27xoc2w$.dlg@40tude.net>
Message-ID: <m24qg4fdzp.fsf@unique.fully.qualified.domain.name.yeah.right>

On Tue, 22 Feb 2005 22:37:28 +0100,
BOOGIEMAN <BOOGIEMANPN at YAHOO.COM> wrote:

> I have line  "time.sleep(60)"  in my code
> How do I cancel waiting 60 seconds if I want to continue with program 
> imediately  ? Like "Press some button if you don't want to wait"

> If it can't be canceled what's the other solution to 
> "wait certain time/or press any button to continue" problem ?

Use the select module.

HTH,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>
?? ? ?? ? c? = 1


From bpeng at rice.edu  Fri Feb  4 19:46:32 2005
From: bpeng at rice.edu (Bo Peng)
Date: Fri, 04 Feb 2005 18:46:32 -0600
Subject: changing local namespace of a function
In-Reply-To: <mailman.1926.1107555819.22381.python-list@python.org>
References: <cu0lru$8ik$1@joe.rice.edu>
	<mailman.1926.1107555819.22381.python-list@python.org>
Message-ID: <cu1518$ld6$1@joe.rice.edu>

Michael Spencer wrote:

> As you no doubt have discovered from the docs and this group, that isn't 
> doable with CPython.

Too bad to know this.

>  >>> a = {'x':1, 'y':2}
>  >>> b = {'x':3, 'y':3}
>  ...
>  >>> def funa(x,y, **kw):
>  ...     del kw     #Careful of unwanted names in locals with this approach
>  ...     z = x + y
>  ...     return locals()

There are hundreds of items in the dictionary (that will be needed in 
the calculation) so passing the whole dictionary is a lot better than 
passing individual items.

> Alternatively, you could use exec:

Yes. I thought of using exec or eval. If there are a dozen statements,

def fun(d):
   exec 'z = x + y' in globals(), d

seems to be more readable than

def fun(d):
   d['z'] = d['x'] + d['y']

But how severe will the performance penalty be?

Bo



From steve at holdenweb.com  Thu Feb  3 10:09:59 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 03 Feb 2005 10:09:59 -0500
Subject: ModPython: passing variables between handlers?
In-Reply-To: <36eq43F4sdgp6U1@individual.net>
References: <20050203134542.CC5741E4009@bag.python.org>
	<mailman.1814.1107439832.22381.python-list@python.org>
	<36eq43F4sdgp6U1@individual.net>
Message-ID: <42023EC7.9060003@holdenweb.com>

Diez B. Roggisch wrote:

> Hi,
> 
> first of all - please quote appropriately - especially if you receive the
> postings as digest. That prevents the signal-to-noise-ratio dropping to
> unknown lows...
> 
> 
>>Your responses will give me the required lifetime for my variables, but
>>not the required access at all levels of code (unless req is a global
>>variable?).
>>
>>Do you have any other suggestions as to how this might be implemented?
> 
> 
> If the code you showed us _is_ what you use - then req seems to be a global
> variable. Otherwise it won't work. 
> 
> 
Yes, I've changed the subject line to try and avoid too much further 
confusion.

Andrew, you are aware, I take it, that the request object is provided as 
an argument to each handler that's called for a request?

Using any kind of global in mos_python code is dangerous because of the 
potential for one request's changes to overwrite another's. I've had to 
deal with similar complications in my own code, but you may want to 
think about biting the bullet. Globals are almost always a bad idea in 
multi-user contexts like this.

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From jamesthiele.usenet at gmail.com  Sun Feb  6 15:54:40 2005
From: jamesthiele.usenet at gmail.com (jamesthiele.usenet at gmail.com)
Date: 6 Feb 2005 12:54:40 -0800
Subject: loops -> list/generator comprehensions
References: <1107718117.221204.80410@l41g2000cwc.googlegroups.com>
	<yZOdnSUV0umX5ZvfRVn-vQ@comcast.com>
Message-ID: <1107723280.515023.61000@l41g2000cwc.googlegroups.com>

> HTH, 

It does. Thanks.



From exogen at gmail.com  Sun Feb 13 16:51:32 2005
From: exogen at gmail.com (Brian Beck)
Date: Sun, 13 Feb 2005 16:51:32 -0500
Subject: builtin functions for and and or?
In-Reply-To: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>
References: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>
Message-ID: <cuoiam$hfv$1@eeyore.INS.cwru.edu>

Roose wrote:
> I need this a lot: a one line way to do a n-ary and or 'or'.

Here's a one-liner for the n-ary and:

bool(min(bool(x) for x in L))


py> bool(min(bool(x) for x in [1, 1, 1, 0]))
False
py> bool(min(bool(x) for x in [1, 1, 1, 1]))
True
py> bool(min(bool(x) for x in ['a', '', 'b', 'c']))
False
py> bool(min(bool(x) for x in ['a', 'b', 'c', 'd']))
True

--
Brian Beck
Adventurer of the First Order


From danperl at rogers.com  Sun Feb  6 00:32:03 2005
From: danperl at rogers.com (Dan Perl)
Date: Sun, 6 Feb 2005 00:32:03 -0500
Subject: CGI POST problem was: How to read POSTed data
References: <mailman.1980.1107622913.22381.python-list@python.org>
	<dMydnSAsTcgE2JjfRVn-oQ@rogers.com>
	<1107666525.996901.30980@l41g2000cwc.googlegroups.com>
Message-ID: <pbadnWW9dqRINpjfRVn-uw@rogers.com>


"M.E.Farmer" <mefjr75 at hotmail.com> wrote in message 
news:1107666525.996901.30980 at l41g2000cwc.googlegroups.com...

> Dan,
> I was wondering how you were coming with your project.
> I had wondered if i had missed something going the CherryPy route
> instead of CGI. Now I see that you have had a bit of a snag , sorry to
> hear that.
> I am glad you are at least learning new things, 'cause if you had used
> CherryPy2 you would have be done by now :P
> M.E.Farmer

I chose to go first through the cgi module and later CherryPy exactly 
because I thought I will learn more this way.  And I guess I am learning 
more. 




From bdesth.quelquechose at free.quelquepart.fr  Mon Feb 14 20:33:07 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 15 Feb 2005 02:33:07 +0100
Subject: DHTML control from Python?
In-Reply-To: <140220051803075043%kenneth.m.mcdonald@sbcglobal.net>
References: <140220051355142173%kenneth.m.mcdonald@sbcglobal.net>
	<opsl7jxcz26yt6e7@news.cisco.com>
	<140220051803075043%kenneth.m.mcdonald@sbcglobal.net>
Message-ID: <42114ecf$0$6837$626a14ce@news.free.fr>

Kenneth McDonald a ?crit :
> In article <opsl7jxcz26yt6e7 at news.cisco.com>, aurora <aurora00 at gmail.com> wrote:
> 
> What are the win 32 modules? Searching "OS X win 32" on Google gave me a bit
> too much...
> 

I guess Aurora did not took time to read your whole post. Win32 modules 
are for Windows, of course...


From martin at v.loewis.de  Sun Feb 20 09:01:09 2005
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 20 Feb 2005 15:01:09 +0100
Subject: unicode encoding usablilty problem
In-Reply-To: <mailman.2857.1108901156.22381.python-list@python.org>
References: <opsmekm2ei6yt6e7@news.cisco.com>	<42164d01$0$4676$9b622d9e@news.freenet.de>	<opsme4lcjo6yt6e7@news.cisco.com>	<42186016.7030309@v.loewis.de>
	<mailman.2857.1108901156.22381.python-list@python.org>
Message-ID: <42189825.9090506@v.loewis.de>

Nick Coghlan wrote:
> Having "", u"", and r"" be immutable, while b"" was mutable would seem 
> rather inconsistent.

Yes. However, this inconsistency might be desirable. It would, of 
course, mean that the literal cannot be a singleton. Instead, it has
to be a display (?), similar to list or dict displays: each execution
of the byte string literal creates a new object.

> An alternative would be to have "bytestr" be the immutable type 
> corresponding to the current str (with b"" literals producing 
> bytestr's), while reserving the "bytes" name for a mutable byte 
> sequence.

Indeed. This maze of options has caused the process to get stuck.
People also argue that with such an approach, we could as well
tell users to use array.array for the mutable type. But then,
people complain that it doesn't have all the library support that
strings have.

> The main point being, the replacement for 'str' needs to be immutable or 
> the upgrade process is going to be a serious PITA.

Somebody really needs to take this in his hands, completing the PEP,
writing a patch, checking applications to find out what breaks.

Regards,
Martin


From bdesth.quelquechose at free.quelquepart.fr  Tue Feb 15 18:36:06 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 16 Feb 2005 00:36:06 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cutipk$l5a$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr>
	<XX+64LRqnLECFwAV@objmedia.demon.co.uk>
	<cut6t9$sla$1@usenet.otenet.gr>
	<42123751$0$10042$626a14ce@news.free.fr>
	<cutem3$2t6$2@usenet.otenet.gr>
	<421244f0$0$30339$636a15ce@news.free.fr>
	<cutipk$l5a$1@usenet.otenet.gr>
Message-ID: <421284dc$0$14312$626a14ce@news.free.fr>

Ilias Lazaridis a ?crit :
> bruno modulix wrote:
> 
>> Ilias Lazaridis wrote:
>>
(snip)
>>>
>>> impressive.
>>>
>>> but things are much simpler.
>>
>> Could you be more prolific ?

> Please explain the word "prolific".
> 
Say more


From jeff at ccvcorp.com  Tue Feb 15 17:31:48 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Tue, 15 Feb 2005 14:31:48 -0800
Subject: Calling a function from module question.
In-Reply-To: <o2uQd.32681$6u.27667@fed1read02>
References: <UTsQd.32669$6u.27954@fed1read02>
	<42125d6d$0$28977$e4fe514c@news.xs4all.nl>
	<3LtQd.32674$6u.18210@fed1read02>
	<c5SdndbH1vSS9o_fRVn-sQ@comcast.com>
	<o2uQd.32681$6u.27667@fed1read02>
Message-ID: <1114u0d3foc8593@corp.supernews.com>

Sean wrote:

>>>So what if I have a whole bunch of functions - say 25 of them.
>>>Is there a way to do this without naming each function?
>>
>>Yes [1], but it's basically deprecated and you shouldn't use it. Consider 
>>refactoring your code.
> 
> Refactoring my code?  Sorry, I am not sure what you mean here.

'Refactoring' is just a fancy way of saying 'reorganizing'.  What it 
means in this case is to look at the reason that you have 25 functions 
in this other module whose name you don't want to type.  Perhaps 
reassembling those functions into a class or two will let you have 
fewer names to import, or perhaps there's no compelling reason for 
them to be in a different module to begin with.  (Or, more likely, you 
should just not worry about using the module name.  It's really better 
to keep track of where all of your names come from, and fully 
qualified names do that nicely.  What do you see as the harm of using it?)

Jeff Shannon
Technician/Programmer
Credit International



From mahs at telcopartners.com  Fri Feb  4 22:49:32 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 04 Feb 2005 19:49:32 -0800
Subject: returning True, False or None
In-Reply-To: <6Z6dnVfTmdUDopnfRVn-1A@rcn.net>
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
	<6Z6dnVfTmdUDopnfRVn-1A@rcn.net>
Message-ID: <cu1fia$bvh$1@sea.gmane.org>

Fahri Basegmez wrote:
> reduce(lambda x, y: x or y, lst)
> 
> works but when I tried
> 
> import operator
> reduce(operator.or_, lst)
> 
> this did not work.  It pukes
> 
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> TypeError: unsupported operand type(s) for |: 'NoneType' and 'bool'
> 
> Any comments?
> 
> Fahri
> 
> 
TypeError: unsupported operand type(s) for |: 'NoneType' and 'bool'

operator.or_ is "|" i.e., bitwise, not logical or

Michael



From ianb at colorstudy.com  Wed Feb  9 12:01:16 2005
From: ianb at colorstudy.com (Ian Bicking)
Date: Wed, 09 Feb 2005 11:01:16 -0600
Subject: Prepending to traceback
In-Reply-To: <ctqijj$q6t$1@lnx107.hrz.tu-darmstadt.de>
References: <ctqijj$q6t$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <420A41DC.9060504@colorstudy.com>

Stefan Behnel wrote:
> I want them to look like this:
> 
> Traceback (most recent call last):
>  ...
>   File "/usr/lib/python2.4/site-packages/pyparsing.py", line 456, in parse
>     loc,tokens = self.parseImpl( instring, loc, doActions )
>   File "/usr/lib/python2.4/site-packages/pyparsing.py", line 727, in 
> parseImpl
>     raise exc
>   PyParsing, line 5, in SomeStatement
>     PARSER TEST FOR TESTING MISSING TERM
> ParseException: Expected "SOMEOTHERTERM" (146), (5,9)

This query's a little old now, but I found this through the Weekly URL.

Anyway, Zope's ExceptionFormatter has one answer to this; you put a 
local variable like:

     __traceback_info__ = ('PyParsing, line %i, in %s\n  %s'
         % (line, statement, message))

And then that will show up in the traceback, much like you want.  The 
formatter looks through all the frames for this local variable and 
prints it out when found.  It's used in Zope for showing line numbers 
and other information when its interpreting scripts like Zope Page 
Templates or Python Scripts -- so that instead of just seeing the 
traceback from the interpreter, you also see information about what the 
interpreter is doing.  This sounds similar to what you want.

It's pretty simple to use and it doesn't depend on the rest of Zope: 
http://cvs.zope.org/Products/ErrorReporter/ExceptionFormatter.py?rev=HEAD&content-type=text/vnd.viewcvs-markup


-- 
Ian Bicking  /  ianb at colorstudy.com  /  http://blog.ianbicking.org


From ncoghlan at iinet.net.au  Mon Feb  7 07:54:17 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Mon, 07 Feb 2005 22:54:17 +1000
Subject: Multiple constructors
In-Reply-To: <opsls67jst1js0xs@news.telkomsa.net>
References: <6SjNd.38337$K7.21639@fe2.news.blueyonder.co.uk>	<AinNd.38406$K7.14757@fe2.news.blueyonder.co.uk>
	<opsls67jst1js0xs@news.telkomsa.net>
Message-ID: <420764F9.9010507@iinet.net.au>

Caleb Hattingh wrote:
> Though Alex indicated differently earlier, I intend to always use an 
> "if"  statment inside one constructor to initialise any class in the 
> situation  where the arguments may be different in number and type.  I 
> don't have the  years of experience that Alex has, however, so I may end 
> up regretting it  but right now, it seems to me to be the clearest 
> approach in this  situation.

It varies, and often depends on the *promises* a class can make regarding a set 
of inputs. If you can get a similar effect from a bunch of different types of 
inputs, then putting the functionality all in one method is reasonable.

On the other hand, if there is a significant semantic difference associated with 
certain inputs, but you *can* do something useful with them, then a separate 
method may be called for.

The above applies to both ordinary methods and constructors. The builtins and 
the standard library offer many examples of both situations.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From mattabat at hotmail.com  Wed Feb 23 06:55:45 2005
From: mattabat at hotmail.com (mattabat at hotmail.com)
Date: 23 Feb 2005 03:55:45 -0800
Subject: Making pygopherd working with Mac OS X
In-Reply-To: <41d18a3d$0$20146$45beb828@newscene.com>
References: <36b480ff.0412272333.4d6e3805@posting.google.com>
	<41d18a3d$0$20146$45beb828@newscene.com>
Message-ID: <1109159745.330385.66490@o13g2000cwo.googlegroups.com>

Sorry, can anyone tell me whether the complete.org mailing list is
still alive or not?
I believe I tried subscribing but nothing came back :)
Been a while since I looked at getting pygopherd going, but it appeared
to be a non-trivial task..
Anyone with the time to look at it might be interested :)

--
mattabat

Cameron Kaiser wrote:
> mattabat at hotmail.com (mattabat) writes:
>
> >I attempted to use pygopherd 2.0.9 work with MacPython 2.3 under Mac
> >OS X 10.3.7 but I'm afraid I hit a brick wall trying to make it run.
> >Does anyone know how to make this work?
> >I obtained pygopherd from
> >gopher://gopher.quux.org/1/devel/gopher/pygopherd - or for the
gopher
> >client deprived, from
http://gopher.quux.org:70/devel/gopher/pygopherd
> >Has anyone managed to get pygopherd running with MacPython?
>
> You might subscribe to the complete.org mailing list; John Goerzen
reads
> there. See
>
> 	gopher://gopher.quux.org/0/Software/Gopher/Mailing%20List.txt
>
> --
>       Cameron Kaiser * ckaiser at floodgap.com * posting with a
Commodore 128
>                 personal page: http://www.armory.com/%7Espectre/
>   ** Computer Workshops: games, productivity software and more for
C64/128! **
>                   ** http://www.armory.com/%7Espectre/cwi/ **



From s.varun at gmail.com  Thu Feb 24 15:05:49 2005
From: s.varun at gmail.com (Varun)
Date: Thu, 24 Feb 2005 20:05:49 -0000
Subject: Python Online Programming Contest
Message-ID: <cvlc2t+i91s@eGroups.com>


Hi Friends,
Department of Information Technology, Madras Institute of Technology,
Anna University, India is conducting a technical symposium, Samhita.
As a part of samhita, an
Online Programming Contest is scheduled on Sunday, 27 Feb 2005.

This is the first Online Programming Contest in India to support
Python !!!!.
Other languages supported are C and C++.

For Registration and Rules of the contest, http://www.samhita.info/opc
For details about samhita http://www.samhita.info/

Regards,
-Online Programming Contest team





From tim.golden at viacom-outdoor.co.uk  Tue Feb  8 07:57:44 2005
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 8 Feb 2005 12:57:44 -0000 
Subject: re-entrancy question
Message-ID: <9A28C052FF32734DACB0A288A3533991035A6C@vogbs009.gb.vo.local>

| Tim Golden <tim.golden at viacom-outdoor.co.uk> wrote:
| 
| > No doubt there are more pertinent answers, but unless this is
| > a learning exercise, you'd be better off investigating Pyro:
| > http://pyro.sf.net
| 
| AFAIK pyro is just a RPC implementation for python whereas 
| Twisted is a
| completely different beast that happens to have its own implementation
| of RPC.
| 
| How would the OP be better investigating something different, that he
| probably doesn't even need?
| 
| Your comment would be pertinent only if it considered 
| Perspective Broker
| against pyro, and I admit I don't know how they compare.


Here's the original post, quoted in its entirety:

<quote>
I have a program that instantiates some objects and runs a main loop. 
Before the main loop starts, I create a thread that listens to TCP 
connections on a port.  If any connections are made, and depending on 
the data, I call methods on some of those objects.

I am worried that calling methods on objects from outside the main loop, 
but that are also operated on in the main loop, could cause problems.

My questions:
1) is this safe?
2) what kind of problems could occur?
3) how do I safely handle this?
</quote>

Now *where* is there any mention of Twisted, either in the original
post or in my reply? As I read it, the OP is doing something which
creates local objects (instances, whatever) and has them available
remotely. He's then -- justifiably -- concerned about possible
re-entrancy if more than one outside agent makes a connection on
his TCP port.

It seemed to me that this was -- approximately -- what Pyro does:
you created objects locally and listen on a TCP port for incoming
requests. Since Pyro's author has already solved a number of the
problems associated with doing this kind of thing, I thought it
might be helpful to point this out.

Tim

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________


From sylvain.thenault at logilab.fr  Fri Feb  4 08:16:56 2005
From: sylvain.thenault at logilab.fr (Sylvain Thenault)
Date: Fri, 04 Feb 2005 14:16:56 +0100
Subject: making symlinks with distutils
References: <1107513934.428944.257820@z14g2000cwz.googlegroups.com>
	<pan.2005.02.04.10.59.14.434381@logilab.fr>
	<1107518485.557475.312410@c13g2000cwb.googlegroups.com>
	<pan.2005.02.04.12.43.05.772727@logilab.fr>
	<1107521991.596192.190310@c13g2000cwb.googlegroups.com>
Message-ID: <pan.2005.02.04.13.16.56.562409@logilab.fr>

On Fri, 04 Feb 2005 04:59:51 -0800, Michele Simionato wrote:

> Sylvain Thenault:
>> Actually it does install it is $PREFIX/bin.
> 
> Aha! And how do I set $PREFIX? Is it a Unix environment variable or is it
> a keyword argument in setup? Something like setup( prefix="/usr") ?

it's a command line argument of the "install" command:

python setup.py install --prefix=~/

or

python setup.py install --home=~/

(the difference between --home and --prefix is that the former will
install library in $PREFIX/lib/pythonX.Y/site-packages while the latter
will install it in $PREFIX/lib/python/

-- 
Sylvain Th?nault                               LOGILAB, Paris (France).

http://www.logilab.com   http://www.logilab.fr  http://www.logilab.org




From brown at esteem.com  Fri Feb  4 21:27:45 2005
From: brown at esteem.com (Tom Brown)
Date: Fri, 4 Feb 2005 18:27:45 -0800
Subject: how to send an int over a socket
Message-ID: <200502041827.45302.brown@esteem.com>

Hi,

I have what seems to be a simple problem. But I can not for the life of me 
find a way to send an integer over a socket. The send method will only accept 
strings. Here is what I am trying to do:

testmessage = 'test message'
msglen = len(testmessage)
sock.send(msglen)
sock.send(testmessage)

Now, I know I can do this:

testmessage = 'test message'
sock.send('\xC') # send hard coded length of testmessage in hex in string
sock.send(testmessage)

However, in my actual program I will not know the length of testmessage in 
advance. So how do I convert msglen into a suitable format for the send 
method?

Thanks,
Tom


From jfj at freemail.gr  Mon Feb  7 19:23:29 2005
From: jfj at freemail.gr (jfj)
Date: Mon, 07 Feb 2005 16:23:29 -0800
Subject: Confused with methods
In-Reply-To: <36p3aaF4tdk23U1@individual.net>
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<TL-dneoHycPA35vfRVn-qQ@rogers.com>
	<mailman.2027.1107713399.22381.python-list@python.org>
	<1grl578.1rmaukw1yyw0g4N%aleaxit@yahoo.com>
	<mailman.2059.1107774429.22381.python-list@python.org>
	<36p3aaF4tdk23U1@individual.net>
Message-ID: <42080681.7050201@freemail.gr>


Hello Diez.
I sent a reply to the previous message requesting an example of
what would break, but unfortunatelly it didn't make it in python-list.
Here it is for the record [
> Diez B. Roggisch wrote:
> 
>>If things worked as you wanted it to, that would mean that passing bound
>>method as argument to a class and storing it there to an instance variable
>>that would "eat up" the arguments - surely not the desired behaviour.
> 
> 
> Could you please give an example of this ?
> 
> If you mean:
> 
>    class A:
>       def f(x):
>          print x
> 
>    class B:
>       pass
> 
>    a=A()
>    B.f = a.f
>    b=B()
>    b.f()     #surprise: it works!!
> 
> then that is equally "weird" as my case. "eat up" sounds
> rather bad but all what will happen is an argument number
> mismatch.
> In fact is seems more appropriate to use a.f.im_func in this
> case to "convert the bound method to an unbound one".
> 
> Maybe this happens more often?
> 
> 
> Thanks,
> 
> G.
> 
]

Diez B. Roggisch wrote:

>>If there a good reason that the __get__ of a boundmethod does not
>>create a new boundmethod wrapper over the first boundmethod?
> 
> 
> I already gave you the good reason:
> 
> class A:
>    def callback(self, arg):
>        print self, arg
> 
> def callback(arg):
>     print arg
> 
> class DoSomethingWithCallback:
>     def __init__(self, cb):
>         self.cb = cb
> 
>     def run(self):
>         for i in xrange(100):
>              self.cb(i)
> 
> u = DoSomethingWithCallback(A().callback)
   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oops!!!
I think it would be more obvious to somebody who doesn't know
the python internals, to say:
  # take the callback from A and install it to DSWC
  u=DoSomethingWithCallback( A.callback)
or
  u=DoSomethingWithCallback (A().callback.im_func)
or
  u=DoSomethingWithCallback (A().im_class.callback)


> v = DoSomethingWithCallback(callback)
> 
> # would crash if your suggestion worked
> u.run()
> v.run()
> 

It would complain about not enough arguments.
As it does in the case I'm confused about!

> If you are after currying - look at the cookbook, there are recipes for
> that.

I'm satistfied with Alex's response that it is like that for backwards
compatibility, but in Python 3000 it may be the other way around.


Thanks all.

jfj



From hans at zephyrfalcon.org  Tue Feb  1 22:31:53 2005
From: hans at zephyrfalcon.org (Hans Nowak)
Date: Tue, 01 Feb 2005 22:31:53 -0500
Subject: Where are list methods documented?
In-Reply-To: <slrncvvp7s.ccc.nick@irishsea.home.craig-wood.com>
References: <41ffba7d$0$15879$a1866201@visi.com>
	<mailman.1702.1107279469.22381.python-list@python.org>
	<41ffc37a$0$15874$a1866201@visi.com>
	<mailman.1704.1107282139.22381.python-list@python.org>
	<slrncvvp7s.ccc.nick@irishsea.home.craig-wood.com>
Message-ID: <420049A9.8040705@zephyrfalcon.org>

Nick Craig-Wood wrote:

> Since I'm a unix person, I would have typed
> 
>   pydoc -k sort
> 
> But it doesn't come up with anything useful :-(

FYI, you can get this info using the not-very-intuitive

   pydoc __builtin__.list.sort

e.g.

(C:\Python23\Lib) $ pydoc __builtin__.list.sort
Help on method_descriptor in __builtin__.list:

__builtin__.list.sort = sort(...)
     L.sort(cmpfunc=None) -- stable sort *IN PLACE*; cmpfunc(x, y) -> 
-1, 0, 1

(Rather terse...)

Info on the sort function (together with all the other list methods) is 
also available if you do

   pydoc list

...but for some reason, "pydoc list.sort" doesn't work on my machine 
(Python 2.3.4, Windows XP).

-- 
Hans Nowak
http://zephyrfalcon.org/



From ajsiegel at optonline.com  Wed Feb  9 07:30:08 2005
From: ajsiegel at optonline.com (Arthur)
Date: Wed, 09 Feb 2005 07:30:08 -0500
Subject: Vectors in Visual Python
References: <1107944975.498403.225950@f14g2000cwb.googlegroups.com>
Message-ID: <pbvj01tiob4v5i6usnkr08j10s9koeh5kn@4ax.com>

On 9 Feb 2005 02:29:35 -0800, "FLChamp" <ben.champion at gmail.com>
wrote:

>SOrry if this message is a little confused, it most probably reflects
>the state of the author!

One bit of confusion is in names.  There was a name space clash early
on.  As things shook out "Visual Python" is ActiveState's Python
developement environment for Visual Studio .Net
http://www.activestate.com/Products/Visual_Python/ 
and the  3d programming environmnet to which you question refers
became " VPython".  Just a point of information.  Certainly no great
confusion in the context of your question, but there could be in other
contexts.
>
>I have made a small program that plots the orbit of a planet in visual
>python using visual.vector for all values. If i run the program it is
>clear that the orbit is non-keplerian as the planets gradually moves
>away from the sun. I am pretty sure the orbit should be keplerian so i
>guess there must be some source of error in the program.
>
>I am using "from __future__ import division" and the initial conditions
>I have are from NASA's horizons system, all values are accuracte to
>more than 10 decimal places.
>
>I was wondering if there was a way to specify the type of number used
>by visual.vector, for example, when using an array it is possible to
>specify the type as float64. If visual.vector was using a smaller
>amount of memory to store the number could this be the source of the
>error I am finding? If not what else could be the culprit?

My understanding:

is that VPython "vectors" are in effect flat 3 element Numeric arrays,
and Numeric ararys can be constructed with Float64 specified as the
datatype.  (wonder if that speciufication is a "declaration", and if
so whether that would indicate some conflict between Python's ideology
(Alex's version) and that of its defacto standard numerical processing
library - but I digress) .

Have you tried feeding the VPython the vectors,  arrays declared as
Float64 types.  

May, or may not, get you somewhere.

Art



From aleaxit at yahoo.com  Mon Feb  7 06:50:55 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 7 Feb 2005 12:50:55 +0100
Subject: Confused with methods
In-Reply-To: <4207DA63.8000604@freemail.gr>
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<TL-dneoHycPA35vfRVn-qQ@rogers.com>
	<mailman.2027.1107713399.22381.python-list@python.org>
	<1grl578.1rmaukw1yyw0g4N%aleaxit@yahoo.com>
	<4207DA63.8000604@freemail.gr>
Message-ID: <a7b98294be1918c715e50d5acfe83b56@yahoo.com>


On 2005 Feb 07, at 22:15, jfj wrote:

> Alex Martelli wrote:
>> jfj <jfj at freemail.gr> wrote:
>>> Then, without looking at the previous code, one can say that "x" is a
>>> function which takes one argument.
>> One can say whatever one wishes, but saying it does not make it true.
>> One can say that x is a green frog, but that's false: x is a
>> boundmethod.
>> One can say that x is a function, but that's false: x is a 
>> boundmethod.
>> One can say that x is a spade, but that's false: x is a boundmethod.
>
> I understand that a function and a boundmethod are *different* things.
> For one a *boundmethod* has the attributes im_self, im_class, which
> a function does not have (a green frog neither). Thus they are not
> the same thing.

Great!  So, do *NOT* ``say that "x" is a function'', when you know that 
is false.

> HOWEVER, what I ask is WHY don't we set the tp_descr_get of
> the boundmethod object to be the same as the func_descr_get???
> Or WHY do they *have* to differ in this specific part?

Why we don't change boundmethods' binding behavior NOW is obvious -- 
can't break backwards compatibility.  If you're talking about Python 
3.0, which _will_ be allowed to break backwards compatibility when it 
comes, then I, personally, have no special objection to changing that 
binding behavior; a PEP may be necessary, of course, but it may also be 
possible to get the idea into the existing PEP 3000 by presenting a 
good case on python-dev (not here -- no decisions on Python's future 
are made here).

> I quickly looked at the source of python and it seems that a
> one-liner would be enough to enable this. So it's not that it

You looked too quickly.  Currently, PyMethod objects are used to 
implement both bound and unbound methods, and function 
instancemethod_descr_get (around line 2430 of classobject.c) has the 
logic to implement the differences in __get__ behavior between them.  
Recently GvR mused about doing away with unbound-methods per se, but 
after some discussion on python-dev he currently seems to have 
withdrawn the proposal; you may want to read that discussion in the 
python-dev archives since it's relevant to prototyping your idea.  In 
any case, a one-liner would not be enough, although:

> would be hard to implement it, or inefficient.

...that doesn't necessarily make it either hard or inefficient.

> If there a good reason that the __get__ of a boundmethod does not
> create a new boundmethod wrapper over the first boundmethod?

There might be some inefficiencies in the multiple indirections, but 
that remains to be proven until we have a prototype.  Besides, if there 
are, the right approach would probably be to have some generalization 
of boundmethods able to bind the first N arguments rather than one at a 
time.


Alex



From tbunce at mac.com  Tue Feb  1 17:29:12 2005
From: tbunce at mac.com (Thomas Bunce)
Date: Tue, 01 Feb 2005 14:29:12 -0800
Subject: How do you do arrays
References: <tbunce-0102051052450001@192.168.1.12>
	<1107288521.396952.154000@z14g2000cwz.googlegroups.com>
Message-ID: <tbunce-0102051429120001@192.168.1.12>


It was when I saw a use of complex numbers as a usable statement I became
interested in Python

        Tom


In article <1107288521.396952.154000 at z14g2000cwz.googlegroups.com>,
beliavsky at aol.com wrote:

> If you want do numerical calculations with vectors and matrices, you
> should probably use the Numarray module. Python's built-in lists are
> not intended for heavy numerical computations. They are more flexible
> than the arrays in languages like C and Fortran in that they can store
> elements of different types. One can write, for example,
> x = ["dog",1,2.3] .


From steven.bethard at gmail.com  Wed Feb  2 15:09:11 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 02 Feb 2005 13:09:11 -0700
Subject: CONTEST - What is the (best) solution?
In-Reply-To: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
References: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
Message-ID: <ZMqdnaWd8v37rpzfRVn-sA@comcast.com>

python at hope.cz wrote:
> In a file there can be several dictionaries like this
> {Key11: Value11
> Key12: Value12
> Key13: Value13,
> ...
> ...
> Key1n:Value1n}
> {Key21: Value21
> Key22: Value22
> Key23: Value23,
> ...
> ...
> Key2n:Value2n}
> {Key31: Value31
> Key32: Value32
> Key33: Value33,
> ...
> ...
> Key3n:Value3n}
> ....
> ....
> ....
> {Keyn1: Valuen1
> Keyn2: Valuen2
> Keyn3: Value3,
> ...
> ...
> Keynn:Valuenn}
> 
> Each pair in a dictionary is separated by CRLF and in each dictionary
> numbers of pairs can be different.
> I need to read only the the first and the last dictionaries.What is a
> best solution?

Assumption:
File is small enough to be read into memory at once.  Contents of the 
file have been read into the variable "testdata":

py> # your data
py> testdata="""
... {Key11: Value11
... Key12: Value12,
... Key13: Value13}
... {Key21: Value21,
... Key22: Value22
... Key23: Value23}
... {Key31: Value31
... Key32: Value32,
... Key33: Value33}
... """
py>
py> # get the contents of the first and last dict
py> content_strs = testdata.strip('{}\n\t ').split('}\n{')
py> content_strs = content_strs[0], content_strs[1]
py> print content_strs
('Key11: Value11\nKey12: Value12,\nKey13: Value13', 'Key21: 
Value21,\nKey22: Value22\nKey23: Value23')
py>
py> # correct missing commas and add braces
py> dict_strs = ['{%s}' % s.replace('\n', ',\n').replace(',,\n', ',\n')
...              for s in content_strs]
py> print dict_strs
['{Key11: Value11,\nKey12: Value12,\nKey13: Value13}', '{Key21: 
Value21,\nKey22: Value22,\nKey23: Value23}']
py>
py> # build mapping of names to values
py> names = {}
py> for i in range(1, 4):
...     for j in range(1, 4):
...         s = '%i%i' % (i, j)
...         names['Key%s' % s] = int(s)
...         names['Value%s' % s] = 'V%s' % s
...
py>
py> # eval strings to get dicts
py> first_dict, last_dict = [eval(s, names) for s in dict_strs]
py> first_dict
{11: 'V11', 12: 'V12', 13: 'V13'}
py> last_dict
{21: 'V21', 22: 'V22', 23: 'V23'}


From deetsNOSPAM at web.de  Mon Feb  7 12:23:28 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 07 Feb 2005 18:23:28 +0100
Subject: socket question
References: <mailman.2089.1107796309.22381.python-list@python.org>
Message-ID: <36pm9uF53qlqdU1@individual.net>

> A couple things to notice: we used socket.gethostname() so that the
> socket would be visible to the outside world. If we had used s.bind(('',
> 80)) or s.bind(('localhost', 80)) or s.bind(('127.0.0.1', 80)) we would
> still have a "server" socket, but one that was only visible within the
> same machine.

This is wrong. There is a difference between passing '' and 'localhost'. The
latter  binds the socket only to the ip 127.0.0.1, where '' binds it to all
available ips.

> My problem is that I cannot connect to my server if the client is not on
> the same PC (although I'm doing the above).
> Also:
> 1) my server has more than one IP addresses
> 2) my server does not have any DNS name
> ... so I want to connect to an IP address that I can ping but has no
> name.
> How can I do that ?

Pass the ip as hostname (as string like "192.168.1.10") 

-- 
Regards,

Diez B. Roggisch


From mirandacascade at yahoo.com  Fri Feb 25 10:54:55 2005
From: mirandacascade at yahoo.com (mirandacascade at yahoo.com)
Date: 25 Feb 2005 07:54:55 -0800
Subject: accessor/mutator functions
References: <1109315698.002207.245690@g14g2000cwa.googlegroups.com>
	<mailman.3040.1109321620.22381.python-list@python.org>
Message-ID: <1109346895.024524.77080@g14g2000cwa.googlegroups.com>

If the class had two attributes--x and y--would the code look like
something lik this:

 class C(object):
        def __init__(self):
            self.__x = 0
            self.__y = 0
        def getx(self):
            return self.__x
        def setx(self, x):
            if x < 0: x = 0
            self.__x = x
        def gety(self):
            return self.__y
        def sety(self, y):
            if y < 0: y = 0
            self.__y = y
        x = property(getx, setx)
        y = property(gety, sety)

?

Because if so, does the term 'lazy evaluation' refer to the fact that
instead of:

C().getx()
C().gety()
C().setx(10)
C().sety(10)

one would substitute:

C().x
C().y
C().x = 10
C().y = 10

?



From nytimes at swiftdsl.com.au  Fri Feb 11 08:38:00 2005
From: nytimes at swiftdsl.com.au (news.sydney.pipenetworks.com)
Date: Sat, 12 Feb 2005 00:38:00 +1100
Subject: Testing web applications
In-Reply-To: <cui0pe$r0c$04$1@news.t-online.com>
References: <cui0pe$r0c$04$1@news.t-online.com>
Message-ID: <420CB538.1060108@swiftdsl.com.au>

Achim Domma (Procoders) wrote:
> Hi,
> 
> I'm looking for frameworks to make testing web applications - i.e. 
> parsing and filling out forms - easier. I found Puffin, which looks good 
> but not very usable in the current state. I know that I once read about 
> other nice frameworks, but could not find one via google. Any hints?
> 
> regards,
> Achim

I've used Jython and a java package called httpunit to great effect. It 
even supports javascript on your pages.

Huy


From tedNO95050SPAM at sbcglobal.net  Sat Feb 12 14:16:02 2005
From: tedNO95050SPAM at sbcglobal.net (ted)
Date: Sat, 12 Feb 2005 19:16:02 GMT
Subject: SCons build tool speed
Message-ID: <SBsPd.4406$ZZ.3056@newssvr23.news.prodigy.net>

How does the speed of the Scons build tool compare with Ant? Right now with 
out Ant builds take around an hour. Hoping to speed that up.

TIA,
Ted 




From ajsiegel at optonline.com  Mon Feb  7 10:29:05 2005
From: ajsiegel at optonline.com (Arthur)
Date: Mon, 07 Feb 2005 10:29:05 -0500
Subject: declarations summary
References: <1107750862.485179.61980@c13g2000cwb.googlegroups.com>
	<08re01tp7d9eh7j9pgi3u1672nbhuamaua@4ax.com>
Message-ID: <d62f01l6uf3e2nt1intcl62vit53tatevt@4ax.com>

On Mon, 07 Feb 2005 08:52:40 -0500, Arthur <ajsiegel at optonline.com>
wrote:
> I happen to think Guido's choice was a good and
>courageous one.

which given my perceived track record (in some quarters), is probably
not a very good sign.

Or else by agreeing with Guido sometimes, I get to be right sometimes.

;)

Art


From deetsNOSPAM at web.de  Thu Feb 17 10:44:13 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Thu, 17 Feb 2005 16:44:13 +0100
Subject: [newbie]How to install python under DOS and is there any
	Wxpython can be installed under dos?
References: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
	<1108557065.547230.254540@z14g2000cwz.googlegroups.com>
	<b9-dnTQOwoYK647fRVn-2Q@rogers.com>
	<11172sa1sg2svc8@corp.supernews.com>
	<l4OdneC_7ZH2oInfRVn-3A@rogers.com>
	<zkZQd.9062$Sl3.275762@news4.e.nsc.no>
	<WC0Rd.5165$VI5.2979@newsread3.news.atl.earthlink.net>
	<4K6dneoBWMc4KInfRVn-rA@rogers.com>
Message-ID: <37jsdgF5e56jeU1@individual.net>

john san wrote:

> yes. u need mod-xbox. since its be easy done and we already have OS,
> "Python" support what we need now is only that "Python" can easy to coding
> and show "window" program just like wt we can do under Windows.

You can't. DOS does not allow for graphical output - at least not in a way
python supports it by standard toolkits like wxPython. That has nothing to
do with python, btw. You won't find anything else that can do that - apart
from some really old legacy toolkits that certainly aren't available today. 

Use either Linux with frambuffer output (see freevo) or a "real" Windows
that is capable of showing a graphical ui. 

Maybe somehow the pygame sdl wrapper can be used for gui-stuff. SDL has had
a DOS mode. But it is discontinued.
-- 
Regards,

Diez B. Roggisch


From simon.brunning at gmail.com  Fri Feb 11 11:35:19 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Fri, 11 Feb 2005 16:35:19 +0000
Subject: Alternative to raw_input ?
In-Reply-To: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>
References: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>
Message-ID: <8c7f10c605021108352fe591f5@mail.gmail.com>

On Fri, 11 Feb 2005 17:26:04 +0100, BOOGIEMAN <BOOGIEMANPN at yahoo.com> wrote:
> I need something like "Press any key to continue" code for my program.
> Currently I use : raw_input("Press Enter to continue ") but it's lame.

Err, why?

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From p.nagarajkumar at gmail.com  Fri Feb 25 07:04:34 2005
From: p.nagarajkumar at gmail.com (p.nagarajkumar at gmail.com)
Date: 25 Feb 2005 04:04:34 -0800
Subject: xhtml-print parser
Message-ID: <1109333074.548547.171090@f14g2000cwb.googlegroups.com>

my question is i have parsed the xhtml data stream using c
i need to diplay the content present in the command prompt as the data
present in the webpage as links how it can be done?



From benji at benjiyork.com  Mon Feb 28 16:02:37 2005
From: benji at benjiyork.com (Benji York)
Date: Mon, 28 Feb 2005 16:02:37 -0500
Subject: naming convention for scalars, lists, dictionaries ...
In-Reply-To: <20050228190504.GV9263@performancedrivers.com>
References: <1109613115.760962.292360@z14g2000cwz.googlegroups.com>	<3YydnR3xNd4k_r7fRVn-3g@comcast.com>
	<20050228190504.GV9263@performancedrivers.com>
Message-ID: <422386ED.60007@benjiyork.com>

Jack Diederich wrote:
> Ditto for me, plural implies list and singular implies instance, 
> for (contact) in contacts:
>    # do something with contact

May I ask why you place the parenthesis in the for statement?
--
Benji


From jgrahn-nntq at algonet.se  Sat Feb  5 05:23:44 2005
From: jgrahn-nntq at algonet.se (Jorgen Grahn)
Date: 5 Feb 2005 10:23:44 GMT
Subject: how to send an int over a socket
References: <200502041827.45302.brown@esteem.com>
	<mailman.1943.1107572097.22381.python-list@python.org>
	<7xhdkrpu36.fsf@ruckus.brouhaha.com>
Message-ID: <slrnd097i7.rr5.jgrahn-nntq@frailea.sa.invalid>

On 04 Feb 2005 19:24:29 -0800, Paul Rubin <> wrote:
> Tom Brown <brown at esteem.com> writes:
...
> Why don't you look at the struct module instead.  You could also look
> the xdr or xmlrpc libraries, which may be closer to what you want.

Or look at existing, successful standards like HTTP, SMTP, etc. Most of them
are text-based -- which wastes a small bit of bandwidth and CPU cycles, but
helps debugging and interoperability a lot.

The xdr module which P.R. refers to implements a simple, standard way of
passing binary datatypes over a network, and is available everywhere, for
all languages. Don't know anything about xmlrpc, except that it is
magnitudes more complex and powerful.

/Jorgen

-- 
  // Jorgen Grahn <jgrahn@       Ph'nglui mglw'nafh Cthulhu
\X/                algonet.se>   R'lyeh wgah'nagl fhtagn!


From steven.bethard at gmail.com  Tue Feb  1 19:44:31 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 01 Feb 2005 17:44:31 -0700
Subject: permutations, patterns, and probability
In-Reply-To: <1107302154.447284.100740@o13g2000cwo.googlegroups.com>
References: <1107302154.447284.100740@o13g2000cwo.googlegroups.com>
Message-ID: <5OqdnblLevntv53fRVn-ow@comcast.com>

kpp9c wrote:
> Greetings,
> 
> I am working on a program to produce patterns. What would like is for
> it to  exhaustively produce all possible permutations of a sequence of
> items but for each permutation produce variations, and also a sort of
> stutter based on probability / weighted randomess.
> 
> Let us say we have tiles of four primary colors: ['Red', 'Blue',
> 'Green', 'Yellow']. Now we also have 4 alternatives or substitutes for
> each color ['Maroon', 'Navy_Blue', 'Forest_Green', 'Dark_Brown']
> 
> We pick a unique permutation, say: ['Red', 'Blue', 'Yellow', 'Green']
> 
> Now I would like to pick the primary colors substitute (say 30% chance
> for each element) so instead of our plain
> 
> ['Red', 'Blue', 'Yellow', 'Green']
> 
> we might end up with:
> 
> ['Red', 'Navy_Blue', 'Yellow', 'Forest_Green']
> 
> or
> 
> ['Maroon', 'Navy_Blue', 'Yellow', 'Green']
> 
> Whatever... The main point is that sometimes the original color is
> retained and sometimes the dark color is substituted.
> 
> Now I want to take this list and sometimes stutter an element so that
> there is, let us say a 50% chance for each element, that it is
> stuttered, and it may be repeated 1 (34%), 2(66%), or 3(33%) times. So
> that we could get:
> 
> ['Maroon','Maroon','Navy_Blue', 'Yellow','Yellow','Yellow','Yellow',
> 'Green']
> 
> The program would quit when all 24 (in the case of 4 elements) was
> exhausted.

Playing around with this:

py> def alt_color(color, color_map=dict(Red='Maroon',
...                                     Blue='Navy_Blue',
...                                     Yellow='Forest_Green',
...                                     Green='Dark_Brown')):
...     if random.random() <= 0.3:
...         return color_map[color]
...     return color
...
py> def reps():
...     if random.random() < 0.5:
...         return 1
...     return random.randint(2, 4)
...
py> def combinations(items, n):
...     if n==0:
...         yield []
...     else:
...         for i in xrange(len(items)):
...             item_slice = items[i:i+1]
...             for c in combinations(items[:i]+items[i+1:], n-1):
...                 yield item_slice + c
...
py> colors = ['Red', 'Blue', 'Yellow', 'Green']
py> some_colors = combinations(colors, len(colors)).next()
py> some_colors
['Red', 'Blue', 'Yellow', 'Green']
py> alt_colors = [alt_color(c) for c in some_colors]
py> alt_colors
['Red', 'Navy_Blue', 'Yellow', 'Green']
py> rep_colors = [c for color in alt_colors for c in [color]*reps()]
py> rep_colors
['Red', 'Red', 'Navy_Blue', 'Navy_Blue', 'Navy_Blue', 'Yellow', 'Green', 
'Green']

Hope some of that is helpful.

Steve


From 735115 at gmail.com  Thu Feb 10 22:13:18 2005
From: 735115 at gmail.com (Bryant Huang)
Date: 10 Feb 2005 19:13:18 -0800
Subject: Loading functions from a file during run-time
Message-ID: <1108091598.055004.24890@g14g2000cwa.googlegroups.com>

Hello!

I would like to read in files, during run-time, which contain plain
Python function definitions, and then call those functions by their
string name. In other words, I'd like to read in arbitrary files with
function definitions, using a typical 'open()' call, but then have
those functions available for use.

The 'import' keyword is not appropriate, AFAIK, because I want to be
able to open any file, not one that I know ahead of time (and thus can
import at design-time).

I already have some code that I cobbled together from many newsgroup
posts, but I wonder if there's a cleaner/simpler way to do it.

The following is a toy example of what I'm doing so far. I have a file
called 'bar.txt' that contains two function definitions. I have a main
driver program called 'foo.py' which reads in 'bar.txt' (but should be
able to read any file it hasn't seen before), then calls the two
functions specified in 'bar.txt'.

===== [bar.txt] =====

def negate(x):
	return -x

def square(x):
	return x*x


===== [foo.py] =====

# open functions file
foo_file = open("bar.txt")
foo_lines = foo_file.readlines()
foo_file.close()
foo_str = "".join(foo_lines)

# compile code
foo_code = compile(foo_str, "<string>", "exec")
foo_ns = {}
exec(foo_code) in foo_ns

# use functions
k = 5
print foo_ns["negate"](k)  // outputs -5
print foo_ns["square"](k)  // outputs 25


I'm not sure exactly what happens below the surface, but I'm guessing
the 'compile()' and 'exec()' commands load in 'negate()' and 'square()'
as functions in the global scope of 'foo.py'. I find that when I run
'compile()' and 'exec()' from within a function, say 'f()', the
functions I read in from 'bar.txt' are no longer accessible since they
are in global scope, and not in the scope of 'f()'.

Any pointers would be very welcome.

Thanks!
Bryant



From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Thu Feb  3 09:37:22 2005
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Thu, 03 Feb 2005 15:37:22 +0100
Subject: Popularizing SimpleHTTPServer and CGIHTTPServer
In-Reply-To: <Xns95F25F64B1D31devnulljoreybumpcom@199.45.49.11>
References: <1107412654.121488.157070@c13g2000cwb.googlegroups.com>
	<Xns95F25F64B1D31devnulljoreybumpcom@199.45.49.11>
Message-ID: <42023723$0$28987$e4fe514c@news.xs4all.nl>

Jorey Bump wrote:
> Does anyone know how to use SimpleHTTPServer to:
> 
> 1. Support virtual hosts?
> 
> 2. Support SSL?
> 
> I'd like to use SimpleHTTPServer to create some simple reporting utilities, 
> but can't get past these two points. Is there a NotSoSimpleHTTPServer?

Give Snakelets a try (snakelets.sf.net).
I started it based on SimpleHTTPServer (but it has grown quite a bit 
since), it supports virtual hosts, though not SSL (yet).

Maybe it strikes a good balance for you between features and complexity
(or simplicity, if you like).

--Irmen


From caleb1 at telkomsa.net  Wed Feb  2 22:20:57 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Wed, 02 Feb 2005 22:20:57 -0500
Subject: python and visual C++
References: <ctqdtb$lm7$1@news.univ-rennes1.fr>
Message-ID: <opsllp87k61js0xs@news.telkomsa.net>

Olivier

If you consider using the ctypes module, you can write a dll (windows) or  
a shared object (linux) using anything that can make one of those.

For example, I have successfully used FreePascal to make a dynamic library  
on both windows and linux and use that library within python on both  
platforms.

Heck, even the objectpascal code for the dll was unchanged on both  
platforms.  I simply needed to recompile the objectpascal file on each  
using FreePascal.  Also FreePascal is available on many more platforms  
(though not quite as many as python, I'll wager).

This is the only way I ever intend making native binary additions to my  
own programs.

Regards
Caleb


On Wed, 2 Feb 2005 12:35:08 +0100, Olivier Ravard  
<olivier.ravard at novagrid.com> wrote:

> Hi,
>
> When I tryed to compile a python module using distutils under windows,
> and there is an error message if we do not have Microsoft Visual C++ 6
> installed.
> This is because python have been compiled with MSVC6 and distutils wants  
> it
> in order to compile C++ python modules.
>
> One of the reasons why I use python is because this is a free language.  
> But
> I need
> a non free compilator to compile my C++ module !!! Choosing MSVC to  
> compile
> python is a strange choice since there are other free compilators like
> MinGW.
>
> I think that using another compilator should be possible in order to  
> compile
> python
> modules since I use BOOST/MinGW to develop my own modules...
>
> Diffrerent solutions appears :
>     - peoples who compile python for windows should use a free compilator
>         (MinGW or Microsoft Visual C++ Toolkit 2003 for example)
>     - modify distutils in order to use another compilator
>
> Is there anyone that have experienced this "free" problem and is there a
> solution
> that I did not note. I don't want to buy MSVC...
>
> Thanks
>
> O.R.
>
>
>



From ilias at lazaridis.com  Mon Feb 14 07:26:39 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Mon, 14 Feb 2005 14:26:39 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cuq1he$cd7$1@news1.ucsd.edu>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq1he$cd7$1@news1.ucsd.edu>
Message-ID: <cuq5du$k7g$1@usenet.otenet.gr>

Robert Kern wrote:
> Ilias Lazaridis wrote:
>> Robert Kern wrote:
> [snip]
> 
>>> The answer to most of your questions is, "Because no one has yet 
>>> volunteered their time and effort to get the job done."
>>
>> this answer do not fit in most questions.
>> 
>> please review them again.
> 
> Against my better judgement, I have.
> 
> It certainly fits a, b, and c. It also fits d if you place an implicit 
> "Yes, " in front of the answer. 4/6. I stick with my assessment.

see below.

[...]
>> I ask some questions and suggest some things.
>>
>> Voluntarlily and without beeing paid.
> 
> Questions and suggestions are don't count for much in this community. 
> Code and well-written patches do.
> 
> Stop wasting time on c.l.py and get to work! If you can't do that, then 
> this is not the community you are looking for.

Please speak for yourself.

>> There are many commercial systems around python.
> 
> And yet there is not one company that has someone devoted full-time to 
> developing Python. Not even Guido. 

Who's "Guido"?

> Most of core-Python development happens in people's spare, unpaid time.
> 
> Volunteerism is the core of this community. Trust me.

even if:

Volunteerism does not exclude Professionalism.

>> So please stop this volunteerism-stuff.
> 
> No. You are asking others to volunteer their time, or perhaps, 
> alternately, the PSF and other businesses to volunteer their money to 
> fund people's time to satisfy *your* wants. I am asking you to volunteer 
> *your* time to satisfy *your* wants, 

I'm already doing this.

> or alternately, stop writing questionnaires and bothering us.

Feel free to ignore the threads.

And please speak for yourself.

> Note that this reaction is pretty specific to you and not to other 
> newcomers. Most newcomers do not carry around a sense of entitlement 
> that could flatten a small village. Thus, they are treated with respect 
> and helpfulness. We would appreciate it if you would emulate these 
> people. On a purely pragmatic note, you have to admit that they are 
> getting much better help than you are.

I get the help that I want.

>> If you like to help me and other newcomers, please give me simple some 
>> answers on the initial questions.
> 
> I did provide some answers. Please review them again.

Please have the gentleness [against me and the current/future readers] 
to answer within the context of the original writings.

.

-- 
http://lazaridis.com


From tzot at sil-tec.gr  Mon Feb 28 16:46:16 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Mon, 28 Feb 2005 23:46:16 +0200
Subject: string methods (warning, newbie)
References: <A7B5C22F20EE3C4E95744E2F03F1887F380869@MAYOR.retzlaff.com>
	<mailman.3111.1109477697.22381.python-list@python.org>
	<-_KdnbUPBttz8r_fRVn-ow@comcast.com>
Message-ID: <u84721d6n792e9bmvvcig8v67hapv121eq@4ax.com>

On Sun, 27 Feb 2005 18:12:17 -0700, rumours say that Steven Bethard
<steven.bethard at gmail.com> might have written:

[snip Nick Coghlan's list comprehension]

[STeVe]
>On the other hand, filter doesn't do the same thing:
>
>py> s = u'The Beatles - help - 03 - Ticket to ride'
>py> filter(str.isalpha, s)
>Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
>TypeError: descriptor 'isalpha' requires a 'str' object but received a 
>'unicode'
>py> ''.join(c for c in s if c.isalpha())
>u'TheBeatleshelpTickettoride'

This works though:

.>> filter(type(s).isalpha, s)

-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From fredrik at pythonware.com  Mon Feb 14 17:42:51 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 23:42:51 +0100
Subject: parsing IMAP responses?
References: <42111b20$0$44604$a1866201@visi.com><7x7jlazsyf.fsf@ruckus.brouhaha.com>
	<4211261c$0$44604$a1866201@visi.com>
Message-ID: <cur9c9$9s5$1@sea.gmane.org>

Grant Edwards wrote:

>>> Is there a library somewhere that impliments the IMAP protocol
>>> syntax?
>>
>> It's very messy.
>
> It sure is.  You'd think something intended to be machine-readable
> would be easier to parse.

nobody knows what the IMAP protocol designers intended...

(it's not quite as bad as Netscape's Mork format, but it's pretty close)

</F> 





From redhog at takeit.se  Mon Feb 28 12:52:29 2005
From: redhog at takeit.se (Egil Moeller)
Date: Mon, 28 Feb 2005 18:52:29 +0100
Subject: My C module crashes
Message-ID: <1109613150.3064.78.camel@ystra.clients.takeit.se>

Hi!

I've written a C-module for Python, and it works as intended, but
obviously does something wrong with its memmory management (refference
counting), as it causes Python to segfault now and then (randomly,
whey :S)

The module source code is available at
http://grimoire.takeit.se/files/CReader.c

The code isn't _that_ long, so someone experienced with writing Python C
modules should probably not have that hard a time finding what I do
wrong :)

Thanks in advance,
Egil M?ller




From onurb at xiludom.gro  Mon Feb 14 05:08:23 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Mon, 14 Feb 2005 11:08:23 +0100
Subject: saving a text file
In-Reply-To: <mailman.2514.1108368515.22381.python-list@python.org>
References: <mailman.2514.1108368515.22381.python-list@python.org>
Message-ID: <42107899$0$16280$636a15ce@news.free.fr>

Jan Rienyer Gadil wrote:
> any idea how to automatically save to a text file?

What does 'automatically' mean ?-)

AFAIK, the best way to write something to a file is to
* open the file in write mode
* write your data to the file
* close the file

Hopefully this is quite simple.

f = File('myfile.txt', 'w')
f.write(my_data)
f.close()

You'll of course need to add some code to handle IOErrors...

(snip)

HTH
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for 
p in 'onurb at xiludom.gro'.split('@')])"


From __peter__ at web.de  Mon Feb  7 09:14:52 2005
From: __peter__ at web.de (Peter Otten)
Date: Mon, 07 Feb 2005 15:14:52 +0100
Subject: Unable to run IDLE Under Windows
References: <060220052259038640%eq_fidget@mac.com>
Message-ID: <cu7t51$cic$02$1@news.t-online.com>

Jonathan Polley wrote:

> I have one account on a WindowsXP machine that refuses to run IDLE (or
> any other python script that uses Tk).  Other people can login to that
> PC and IDLE runs just fine, so it is not an installation issue.  When
> the person who has the problem logs into another PC the problem follows
> them.  Any ideas as to what might me wrong?

Perhaps your configuration files contain bad data:

"""
# IDLE reads several config files to determine user preferences.  This
# file is the default config file for general idle settings.
#
# When IDLE starts, it will look in
# the following two sets of files, in order:
#
#     default configuration
#     ---------------------
#     config-main.def         the default general config file
#     config-extensions.def   the default extension config file
#     config-highlight.def    the default highlighting config file
#     config-keys.def         the default keybinding config file
#
#     user configuration
#     -------------------
#     ~/.idlerc/config-main.cfg            the user general config file
#     ~/.idlerc/config-extensions.cfg      the user extension config file
#     ~/.idlerc/config-highlight.cfg       the user highlighting config file
#     ~/.idlerc/config-keys.cfg            the user keybinding config file
#
# On Windows2000 and Windows XP the .idlerc directory is at 
#       Documents and Settings\<username>\.idlerc       
#
# On Windows98 it is at c:\.idlerc
"""

This is from a newer version of python, but your configuration may have a
similar layout. The easiest way to test whether I guessed the cause of your
troubles correctly should be to rename the .idlerc directory so that idle
cannot find it anymore and then try to start it again.

Peter



From pu.news.001 at gmail.com  Sun Feb 27 16:16:34 2005
From: pu.news.001 at gmail.com (Patrick Useldinger)
Date: Sun, 27 Feb 2005 22:16:34 +0100
Subject: os.stat('<filename>')[stat.ST_INO] on Windows
Message-ID: <422238b3$1@news.vo.lu>

What does the above yield on Windows? Are inodes supported on Windows 
NTFS, FAT, FAT32?


From aurora00 at gmail.com  Fri Feb 18 19:21:02 2005
From: aurora00 at gmail.com (aurora)
Date: Fri, 18 Feb 2005 16:21:02 -0800
Subject: unicode encoding usablilty problem
References: <opsmekm2ei6yt6e7@news.cisco.com>
	<42164d01$0$4676$9b622d9e@news.freenet.de>
Message-ID: <opsme4lcjo6yt6e7@news.cisco.com>

On Fri, 18 Feb 2005 21:16:01 +0100, Martin v. L?wis <martin at v.loewis.de>  
wrote:

> I'd like to point out the
> historical reason: Python predates Unicode, so the byte string type
> has many convenience operations that you would only expect of
> a character string.
>
> We have come up with a transition strategy, allowing existing
> libraries to widen their support from byte strings to character
> strings. This isn't a simple task, so many libraries still expect
> and return byte strings, when they should process character strings.
> Instead of breaking the libraries right away, we have defined
> a transitional mechanism, which allows to add Unicode support
> to libraries as the need arises. This transition is still in
> progress.

I understand. So I wasn't yelling "why can't Python be more like Java". On  
the other hand I also want to point out making individual decision for  
each string wasn't practical and is very error prone. The fact that  
unicode and 8 bit string look alike and work alike in common situation but  
only run into problem with non-ASCII is very confusing for most people.


> Eventually, the primary string type should be the Unicode
> string. If you are curious how far we are still off that goal,
> just try running your program with the -U option.

Lots of errors. Amount them are gzip (binary?!) and strftime??

I actually quite appriciate Python's power in processing binary data as  
8-bit strings. But perhaps we should transition to use unicode as text  
string as treat binary string as exception. Right now we have

   '' - 8bit string; u'' unicode string

How about

   b'' - 8bit string; '' unicode string

and no automatic conversion. Perhaps this can be activated by something  
like the encoding declarations, so that transition can happen module by  
module.


> Regards,
> Martin



From enleverlesO.OmcO at OmclaveauO.com  Mon Feb 14 16:12:07 2005
From: enleverlesO.OmcO at OmclaveauO.com (Do Re Mi chel La Si Do)
Date: Mon, 14 Feb 2005 22:12:07 +0100
Subject: DHTML control from Python?
References: <140220051355142173%kenneth.m.mcdonald@sbcglobal.net>
	<421111c4$0$6595$8fcfb975@news.wanadoo.fr>
Message-ID: <4211143a$0$6602$8fcfb975@news.wanadoo.fr>

Oh, Sorry, I had read too fast.
I see, now, the word "Mac".
Apologies.

Michel Claveau





From tchur at optushome.com.au  Fri Feb  4 17:37:02 2005
From: tchur at optushome.com.au (Tim Churches)
Date: Sat, 05 Feb 2005 09:37:02 +1100
Subject: [Fwd: [gnu.org #220719] Re: python and gpl]
In-Reply-To: <4203F1E1.2000001@optushome.com.au>
References: <mailman.1861.1107484943.22381.python-list@python.org>	<ctvkf2$853$1@blackmamba.itd.rl.ac.uk>
	<4203F1E1.2000001@optushome.com.au>
Message-ID: <4203F90E.4090408@optushome.com.au>

Tim Churches wrote:
 > Can't get much clearer than that.

Whoops! Sorry about all the embedded HTML links, making it most unclear. 
Here is the relevant Australian law in a clearer form:

>      COPYRIGHT ACT 1968 (as amended by the Copyright Amendment Act
>      2000) - SECT 47B
>
> *Reproduction for normal use or study of computer programs*
>
>             (1)   Subject to subsection (2), the copyright  in a 
> literary work  that is a computer program  is not infringed by the 
> making of a reproduction of the work  if:
>                     (a)   the reproduction  is incidentally and 
> automatically made as part of the technical process of running a copy 
> of the program for the purposes for which the program was designed; and
>                     (b)   the running of the copy  is done by, or on 
> behalf of, the owner or licensee of the copy .
>             (2)   Subsection (1) does not apply to the making of a 
> reproduction of a computer program:
>                     (a)   from an infringing copy of the computer 
> program ; or
>                     (b)   contrary to an express direction  or 
> licence  given by, or on behalf of, the owner of the copyright in the 
> computer program to the owner or licensee of the copy from which the 
> reproduction is made when the owner or licensee of that copy acquired it.

I see no express directions or other provisions in the GPL which would 
invoke section 47(2). Indeed, the GPL says: "The act of running the 
Program is not restricted".

Tim C



From tjreedy at udel.edu  Mon Feb 21 16:20:05 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 21 Feb 2005 16:20:05 -0500
Subject: Don't understand global variables between modules
References: <4219ba1f$0$162$e4fe514c@dreader14.news.xs4all.nl>
Message-ID: <cvdj3l$osu$1@sea.gmane.org>


"Bart" <bvdeenen at access-four-all.nl.invalid> wrote in message 
news:4219ba1f$0$162$e4fe514c at dreader14.news.xs4all.nl...
> I don't understand globals between multiple modules in a python program.

Because there are not any.  All names are bound to objects in a module 
global namespace, a function local namespace, or an object attribute 
namespace.

The builtins seem like and act like intermodule 'globals', but their names 
are bound in a hidden module which is imported to all other modules and 
treated like an extension of each module's namespace.  Users can do 
something similar by defining a 'myglobals' module and importing it 
everywhere.

> I've narrowed it down to the following two very simple
> programs a.py and b.py. When I run a.py I get the following output:
>
> inc:  2
> A:  2
> inc:  3
> B:  3
> C:  1
> I don't understand the last line at all.

Don't feel too bad.  While I 'know' the answer -- running anyfile.py 
creates a module named '__main__' while importing it (in another module) 
creates a separate module named 'anyfile' -- it did not 'click' until 
reading Fredrik's hint.  You created a nice, memorable example that shows 
that __main__ is not anotherfile.anyfile (in this case, not b.a)!

Terry J. Reedy





From peter at engcorp.com  Sat Feb 12 22:29:46 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 12 Feb 2005 22:29:46 -0500
Subject: For American numbers
In-Reply-To: <420e7376$1@nntp0.pdx.net>
References: <420e7376$1@nntp0.pdx.net>
Message-ID: <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>

Scott David Daniels wrote:
> Kind of fun exercise (no good for British English).
> 
>     def units(value, units='bytes'):
>         magnitude = abs(value)
>         if magnitude >= 1000:
>             for prefix in ['kilo mega giga tera peta '
>                            'exa zetta yotta').split():
>                 magnitude /= 1000.
>                 if magnitude < 1000.:
>                     break

Only for hard drive manufacturers, perhaps.

For the rest of the computer world, unless I've missed
a changing of the guard or something, "kilo" is 1024
and "mega" is 1024*1024 and so forth...

-Peter


From kent37 at tds.net  Mon Feb 21 07:36:09 2005
From: kent37 at tds.net (Kent Johnson)
Date: Mon, 21 Feb 2005 07:36:09 -0500
Subject: recommended way of generating HTML from Python
In-Reply-To: <1108965380.059565.200110@g14g2000cwa.googlegroups.com>
References: <1108889625.068929.88890@z14g2000cwz.googlegroups.com>
	<4218f506$0$1220$8fcfb975@news.wanadoo.fr>
	<1108965380.059565.200110@g14g2000cwa.googlegroups.com>
Message-ID: <4219d2a5$1_1@newspeer2.tds.net>

Michele Simionato wrote:
> The problem is a problem of standardization, indeed. There plenty of
> recipes to
> do the same job, I just would like to use a blessed one (I am teaching
> a Python
> course and I do not know what to recommend to my students).

Why not teach your students to use a template system?

> FWIW, here is a my version of the recipe (stripped down to the bare
> essentials)
> 
> .def makeattr(dict_or_list_of_pairs):
> .    dic = dict(dict_or_list_of_pairs)
> .    return " ".join("%s=%r" % (k, dic[k]) for k in dic)
> 
> .class HTMLTag(object):
> .    def __getattr__(self, name):
> .        def tag(value, **attr):
> .            """value can be a string or a sequence of strings."""
> .            if hasattr(value, "__iter__"): # is iterable
> .                value = " ".join(value)
> .            return "<%s %s>%s</%s>\n" % (name, makeattr(attr), value,
> name)
> .        return tag
> 
> # example:
> .html = HTMLTag()
> 
> .tableheader = ["field1", "field2"]
> .tablebody = [["a1", "a2"],
> .         ["b1", "b2"]]
> 
> .html_header = [html.tr(html.th(el) for el in tableheader)]
> .html_table = [html.tr(html.td(el) for el in row) for row in tablebody]
> .print html.table(html_header + html_table)

*Shudder*

I've written web pages this way (using a pretty nice Java HTML generation package) and I don't 
recommend it. In my experience, this approach has several drawbacks:
- as soon as the web page gets at all complex, the conceptual shift from HTML to code and back is 
difficult.
- It is hard to work with a designer. The designer will give you sample web pages which then have to 
be hand-translated to code. Changes to the web page have to be located in the code.
- There is no separation of content and presentation

IMO templating systems are a much better solution. They let you express HTML in HTML directly; you 
communicate with a designer in a language the designer understands; you can separate content and 
presentation.

Kent

>     
>           Michele Simionato
> 


From just at xs4all.nl  Mon Feb 28 15:41:37 2005
From: just at xs4all.nl (Just)
Date: Mon, 28 Feb 2005 21:41:37 +0100
Subject: naming convention for scalars, lists, dictionaries ...
References: <1109613115.760962.292360@z14g2000cwz.googlegroups.com>
	<3YydnR3xNd4k_r7fRVn-3g@comcast.com>
	<20050228190504.GV9263@performancedrivers.com>
	<422386ED.60007@benjiyork.com>
	<mailman.3152.1109622405.22381.python-list@python.org>
Message-ID: <just-F282AF.21413728022005@news1.news.xs4all.nl>

In article <mailman.3152.1109622405.22381.python-list at python.org>,
 Jack Diederich <jack at performancedrivers.com> wrote:

> On Mon, Feb 28, 2005 at 04:02:37PM -0500, Benji York wrote:
> > Jack Diederich wrote:
> > >Ditto for me, plural implies list and singular implies instance, 
> > >for (contact) in contacts:
> > >   # do something with contact
> > 
> > May I ask why you place the parenthesis in the for statement?
> 
> I like the tuple-ness feel of it and frequently unpack multiple
> values in for loops.  I also like the visual feel, it makes it
> easy to see what is being unpacked and what is the source.
> 
> "for (one, two, three) in somelist:"
> versus
> "for one, two, three in sometlist:"
> 
> Even with a colorizing editor (emacs) I find the first version
> easier to read.  YMMV.

But you're using it for _single_ values. That's like writing

      (val) = someFunction(...)

Just


From timr at probo.com  Sun Feb  6 23:43:04 2005
From: timr at probo.com (Tim Roberts)
Date: Sun, 06 Feb 2005 20:43:04 -0800
Subject: Converting a string to a function pointer
References: <mailman.1875.1107514850.22381.python-list@python.org>
Message-ID: <sbsd01p4m7b6upko072lmvuadblr1ct5jd@4ax.com>

H?kan Persson <hakan at zyberit.com> wrote:
>
>I am trying to "convert" a string into a function pointer.
>Suppose I have the following:
>
>from a import a
>from b import b
>from c import c
>
>funcString = GetFunctionAsString()
>
>and funcString is a string that contains either "a", "b" or "c".
>How can I simply call the correct function?
>I have tried using getattr() but I don't know what the first (object) 
>argument should be in this case.

You've received a lot of hi-tech answers, but don't overlook the simple
(and possibly more secure) answer:

lookup = {
  'a': a,
  'b': b,
  'c': c,
}

if lookup.has_key(myFunction):
    return lookup[myFunction]()
else:
    print "Couldn't find", myFunction
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From dmarcusanu at yahoo.com  Tue Feb  1 22:23:12 2005
From: dmarcusanu at yahoo.com (Dana Marcusanu)
Date: Tue, 1 Feb 2005 19:23:12 -0800 (PST)
Subject: getting data from a port in use
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E801DAFDE4@its-xchg4.massey.ac.nz>
Message-ID: <20050202032312.16389.qmail@web52906.mail.yahoo.com>

Yes. It hangs at accept. I always end up doing end task because it never
passes the "accept" statement. When I set the port I use netstat (netstat
-bn) to get the ports that are in use. I use PythonWin 2.4. I am still
puzzled about the fact that it runs fine for you.
You are right about using the work_socket instead of s. My program never
ran to that line so I did not notice the error.

Thank you, Dana
--- Tony Meyer <t-meyer at ihug.co.nz> wrote:

> > I am trying to use Python to get the data received at a 
> > specific port (in use) on my computer. I already tried below
> > code which seems to hang at the statement accepting
> > connections. 
> 
> Seems to hang, or does hang?  Using print statements will tell you
> whether
> that's where it's getting stuck or not.
> 
> > I don't know what else I can try. Any
> > suggestions will be welcome.
> > 
> > import socket, select, os 
> > 
> > PORT = 2005
> > s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> > s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) 
> > s.bind((socket.gethostname(), PORT))
> > s.listen(1)
> > work_socket, addr = s.accept() 
> > data = s.recv(1024)
> [...]
> 
> This should be 'data = work_socket.recv(1024)'.
> 
> This script works for me with that change.  (i.e. I can run it with port
> 2005 already in use, connect to the port, and it will finish without
> error).
> 
> =Tony.Meyer
> 
> 



		
__________________________________ 
Do you Yahoo!? 
Take Yahoo! Mail with you! Get it on your mobile phone. 
http://mobile.yahoo.com/maildemo 


From ncoghlan at iinet.net.au  Mon Feb  7 07:40:35 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Mon, 07 Feb 2005 22:40:35 +1000
Subject: variable declaration
In-Reply-To: <roy-6A286B.10055306022005@reader2.panix.com>
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>	<qb1a01lk3mv4vp852q88prqb9al336h9r2@4ax.com>	<1grj036.r13xcy1d72inbN%aleaxit@yahoo.com>	<2qba01d1men2ai48gp4cojo2e28rd5g9ob@4ax.com>	<1grjzia.1a4qr9q1t3p77bN%aleaxit@yahoo.com>
	<roy-6A286B.10055306022005@reader2.panix.com>
Message-ID: <420761C3.6040103@iinet.net.au>

Roy Smith wrote:
> I'm not sure what that last sentence is supposed to mean, but I have 
> visions (nightmares?) of someday having ANSI, ISO, IEEE, or some other such 
> organization notice that something useful exists which they haven't yet 
> standardized/broken and decide to form a committee to do it.

So long as the committee consists of one member who has the initials GvR and is 
known as the Python BDFL, we should be OK ;)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From invalidemail at aerojockey.com  Sun Feb 20 07:39:44 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 20 Feb 2005 04:39:44 -0800
Subject: lambda closure question
In-Reply-To: <mailman.2831.1108814832.22381.python-list@python.org>
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
	<1108808502.699333.66520@g14g2000cwa.googlegroups.com>
	<mailman.2831.1108814832.22381.python-list@python.org>
Message-ID: <1108903184.145726.223480@l41g2000cwc.googlegroups.com>


jfj wrote:
> Yes, but according to the python philosophy one could pass locals()
> to the nested function and grab the values from there. Seems
practical
> for the rareness of this...

First of all, I really don't agree that it's a rare need.  I use it
pretty often.

Second of all, the whole point of referencing the outer scope is so you
don't *have* to pass stuff around.  Saying that you can accomplish the
same thing by passing locals() isn't right, because the thing you were
accomplishing was not having to pass anything around.

Say you have a suite of functions, all of which are called by some main
function and each other, and all of which need to access a lot of the
same data.  The best, most straightforward way to do it is to have the
common data be a local variable of the main function, and nest the
suite inside it.  The other way to do it, passing around a common data
structure, add complexity and hurts performance.

And it's a pretty common situation; a lot of recursive algorithms can
make very good use of this.


-- 
CARL BANKS



From news at NOwillmcguganSPAM.com  Sat Feb 19 19:34:46 2005
From: news at NOwillmcguganSPAM.com (Will McGugan)
Date: Sun, 20 Feb 2005 00:34:46 +0000
Subject: PIL Expand Canvas
In-Reply-To: <mailman.2842.1108851124.22381.python-list@python.org>
References: <mailman.2842.1108851124.22381.python-list@python.org>
Message-ID: <4217db27$0$32617$db0fefd9@news.zen.co.uk>

Daniel Bowett wrote:
> I'm new to the PIL module but think it would be useful for dealing with 
> all the product images for the sites I work on. I can see how to do most 
> things I need apart from expanding the canvas.
> 
> By that I mean if I have an image which is 200 pixels high and 180 
> pixels wide - I will want to pad it left and right by 10 pixels with 
> white space to make it a 200x200 square.
> 
> Is this possible?

You could create a new canvas of the larger dimensions, then copy the 
smaller one to the centre of it..

Will McGugan


From mwm at mired.org  Mon Feb 21 01:05:09 2005
From: mwm at mired.org (Mike Meyer)
Date: Mon, 21 Feb 2005 00:05:09 -0600
Subject: [Fwd: Re: [Uuu-devel] languages] <-- Why Python
References: <mailman.2781.1108677768.22381.python-list@python.org>
	<1108678805.542584.171930@z14g2000cwz.googlegroups.com>
	<mailman.2783.1108679758.22381.python-list@python.org>
	<864qgaisoq.fsf@guru.mired.org>
	<mailman.2785.1108689484.22381.python-list@python.org>
	<86vf8qhcql.fsf@guru.mired.org>
	<mailman.2787.1108691319.22381.python-list@python.org>
	<86r7jdh5vw.fsf@guru.mired.org>
	<5339b60d.0502200139.63509594@posting.google.com>
Message-ID: <86braeh2i2.fsf@guru.mired.org>

paul at boddie.org.uk (Paul Boddie) writes:

> Mike Meyer <mwm at mired.org> wrote in message news:<86r7jdh5vw.fsf at guru.mired.org>...
>> Arich Chanachai <macrocosm at fastmail.fm> writes:
>> 
>> > When the CLR is integrated, it will allow a wide array of problem
>> > solving choices for uuu users.
>> 
>> You've missed the point. Allowing a wide array of problem solving
>> choices is a goal, not a means. Instead of concentrating on adding
>> langauges, you should be provding an infrastructure that makes adding
>> langauges simple.  The Plan 9 example does this best, as any language
>> that can do file I/O is supported.
>
> This discussion collides quite nicely with two of the more quoted
> articles on software development:
>
> http://primates.ximian.com/~miguel/bongo-bong.html

I've actually done some work on using CORBA as a COM for Unix (or, as
I think of it, an ARexx for Unix). After being exposed to Plan 9, I've
decided that's a better solution. CORBA has the advantage that you can
work on it without getting buy-in from kernel vendors.

> In contrast, the standard UNIX model of interprocess communication and
> introspection, extended substantially by Plan 9 and more
> conservatively by modern UNIX variants, is said to leave something to
> be desired, and those wishing more informative details about the
> interfaces exposed by programs and services usually end up putting
> something more complicated on top - see the emergence of Bonobo, DCOP
> and D-BUS.

The crucial question isn't whether the underlying mechanism is
complete, but whether it's sufficient. The underlying Unix facilities
provide byte streams - because that's what Unix does. What that leaves
to be desired is a standard high-level way for applications to
interact with each other, passing back and forth things that are more
complicated than byte streams. Having standars for these high-level
objects allows for code reuse and data sharing. This is a good thing,
and there's nothing inherently wrong with doing things this way.

    <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From mcfletch at rogers.com  Tue Feb  1 09:13:31 2005
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Tue, 01 Feb 2005 09:13:31 -0500
Subject: PyCon signature advertising
In-Reply-To: <lELLd.101987$Jk5.75234@lakeread01>
References: <lELLd.101987$Jk5.75234@lakeread01>
Message-ID: <41FF8E8B.5070505@rogers.com>

Steve Holden wrote:
...

> I appreciate that not everyone has control over their .sig,

...

Take control of your sigs, my sisters and brothers!  Viva la 
Revolution!  Follow the Steve into the heat and light of PyCon.  You can 
achieve enlightenment if only you go to the District on the Eastern Edge 
of the new continents when the spring arrives.  It is only there that 
all will be revealed.  It is only there that you shall find peace.

Joy to the Python world!
Mike

________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com
                              PyCon is coming...



From ncoghlan at iinet.net.au  Sat Feb  5 22:03:52 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 06 Feb 2005 13:03:52 +1000
Subject: Insane import behaviour and regrtest.py: heeelp
In-Reply-To: <87sm4aws3v.fsf@pobox.com>
References: <87sm4aws3v.fsf@pobox.com>
Message-ID: <42058918.5090002@iinet.net.au>

John J. Lee wrote:
> The only change I made to regrtest other than the print statements was
> to add Lib to sys.path, so I pick up modules from CVS instead of the
> installed 2.4 versions (yeah, I know I should build and install a
> python2.5 executable from CVS, but I don't see how that's relevant here).

I didn't read your whole message so I may be off track here, but regrtest.py has 
some arguably demented path handling behaviour, and it's driven mainly by the 
physical location of regrtest.py. In particular:

def findtestdir():
     if __name__ == '__main__':
         file = sys.argv[0]
     else:
         file = __file__
     testdir = os.path.dirname(file) or os.curdir
     return testdir

So intead of adding anything to sys.path, tweak the call to 'main' on the final 
line to set "testdir" appropriately.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From jdadson at yahoo.com  Wed Feb  9 17:39:48 2005
From: jdadson at yahoo.com (Jive Dadson)
Date: Wed, 09 Feb 2005 22:39:48 GMT
Subject: negative integer division
References: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
	<42096EAD.879E8A5F@yahoo.com> <86wtti76cp.fsf@guru.mired.org>
Message-ID: <420A916C.94F7F175@yahoo.com>



Mike Meyer wrote:
> 
> Jive Dadson <jdadson at yahoo.com> writes:
> 
> > Python does it right.  C is allowed to do it anyway it likes, which was
> > a stupifyingly horrible decision, IMHO.
> 
> C only does it wrong if you think that C is a high level language. 

I didn't say it does it wrong.  I said it does it anyway it likes --
maybe right, maybe wrong.  There *is* a right way, IMHO.  Python does it
that way.

> [C] isn't - it's a portable assembler.

I've heard that many times, but it makes no sense to me.  By definition,
the syntax of an assembly language closely resembles the format of
individual hardware instructions for a particular processor.  An
assembler assembles individual hardware instructions.  Back in the day,
Unix (written largely in C) and Steve Johnson's pcc (the *portable* C
compiler) together constituted a big leap forward.  Implementing Unix on
new processors was infinitely easier than porting OS's written in
assembly language.  So I disagree on two counts: C code is not entirely
portable, (for example, division and mod may not work the same on two
different machines), and a C compiler is most certainly not an
assembler.


> Now, I'll agree with you if you want to argue that some machines do
> negative integer division in stupifyingly horrible ways.

That's why I think it was a stupifyingly horrible decision. 
Understandable, but in the end an s.h.d. nonetheless.  It would have
been okay to define / and % correctly, in the mathematical sense, but
also provide functions quick_div() and quick_mod() that were guaranteed
to work correctly only when both arguments were positive.  The way they
did it is just too error prone, akin to early optimization.  It's bitten
me before, when I was called on to port code (which I did not write)
from one machine to another.  Having standard operators with
under-defined behavior is just inviting trouble: long debugging
sessions, or worse, unexplained failures in the field.  Of course you
and I would avoid all the pitfalls at the start. :-)

... and now back to your regularly scheduled Python newsgroup.


From theller at python.net  Wed Feb 16 16:14:46 2005
From: theller at python.net (Thomas Heller)
Date: Wed, 16 Feb 2005 22:14:46 +0100
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<mailman.2717.1108585355.22381.python-list@python.org>
Message-ID: <oeek5hrt.fsf@python.net>

Skip Montanaro <skip at pobox.com> writes:

>     John> 4. For consistency, would you like "1" + 2 to produce "12"?
>
> No, the correct answer is obviously 3. ;-)
>
> S

No, '"1"2' is correct.  Or '"1"+2'.


From adykes at panix.com  Fri Feb  4 09:12:56 2005
From: adykes at panix.com (Al Dykes)
Date: 4 Feb 2005 09:12:56 -0500
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<kavad2-59d.ln1@eskimo.tundraware.com>
	<7xlla5t3lw.fsf@ruckus.brouhaha.com>
	<g9ibd2-kuf.ln1@eskimo.tundraware.com>
Message-ID: <ctvvt8$d14$1@panix5.panix.com>

In article <g9ibd2-kuf.ln1 at eskimo.tundraware.com>,
Tim Daneliuk  <tundra at tundraware.com> wrote:
>Paul Rubin wrote:
>
>> Tim Daneliuk <tundra at tundraware.com> writes:
>> 
>>>I worked for an Airline computer reservation system (CRS) for almost a
>>>decade. There is nothing about today's laptops that remotely comes close
>>>to the power of those CRS systems, even the old ones. CRS systems are
>>>optimized for extremely high performance I/O and use an operating system
>>>(TPF) specifically designed for high-performance transaction processing.
>> 
>> 
>> Yeah, I've been interested for a while in learning a little bit about
>> how TPF worked.  Does Gray's book that you mention say much about it?
>
>I honestly do not recall.  TPF/PAARS is an odd critter unto itself
>that may not be covered by much of anything other than IBM docs.

I've seen it covered in some textbook, possibly something by Tanenbaum. 
I imagine it's in the ACM literature and the IBM Systems Journal.  

If we move this thread to alt.folklore.computers we'll get lots of
good info.

-- 

a d y k e s @ p a n i x . c o m 

Don't blame me. I voted for Gore.


From fperez.net at gmail.com  Fri Feb  4 02:09:34 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Fri, 04 Feb 2005 00:09:34 -0700
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot>
Message-ID: <ctv72a$8vs$1@sea.gmane.org>

Ashot wrote:

> I am using IPython in windows and the LightBG setting doesn't correctly
> because the background of the text is black even if the console background
> is white.  Anyone know whats going on?  Thanks.

It's quite possible that it's a bug in the UNC readline implementation proper. 
How do you set the background to white?  Is this something that can be done for
the normal winxp terminal, or do you use a different terminal emulator?

I'd like to have more detailed info before I contact the readline author.  He's
done a great job of providing ANSI-compliant color escape handling for the
piece of junk which MS ships as a terminal, but it's quite possible that he may
have missed something for the case of light backgrounds.

Regards,

f (ipython author)



From jmeile at hotmail.com  Fri Feb 18 14:19:25 2005
From: jmeile at hotmail.com (Josef Meile)
Date: Fri, 18 Feb 2005 20:19:25 +0100
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <42163065.8070708@lazaridis.com>
References: <cuo71l$gig$1@usenet.otenet.gr><cupupa$kfs$2@usenet.otenet.gr>	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>	<1108411893.940158.270090@c13g2000cwb.googlegroups.com>
	<42163065.8070708@lazaridis.com>
Message-ID: <42163FBD.1040707@hotmail.com>

It looks like here the only worth words are yours. Didn't
you close this thread?

I will refresh your mind with your own unpolite way:

"""
Ilias Lazaridis wrote:
[...]

closing thread
http://groups-beta.google.com/group/comp.lang.python/msg/f2ae9cdbe16676d1
"""

Anyway, I will add some comments:

> The defined "extra effort" is the effort to provide the patches for the
> main source-code base?
> 
> If you can send me an email of how to do this, I would take this effort.
Good for you.

> of course I must first know, that the python-team would accept those
> patches (technical applicability provided).
There is no guaranty. Did you forget the reply from Tim Peters:

 > [...] A problem is that a
 > patch won't get reviewed unless a volunteer does a review, and we've
 > got an increasing backlog of unreviewed patches because of that.  The
 > most effective way for a person P to get their patch reviewed now is
 > for P to volunteer to review 5 other patches first.  There are a few
 > Python developers who have promised, in return, to review P's patch
 > then.
So, you will have to review some patches first.


 >Ilias> Now, can you please tell me the process I have to follow to
 >Ilias> suggest the following (to the PSF or to the programmers or to
 >Ilias> the decision takers),possibly to get at least a vote on it:

 >Tim> No such thing will happen -- forget that.  For MinGW to be
 >Tim> supported forever, it's necessary and sufficient that a specific
 >Tim> person volunteer to support MinGW forever.  If that person goes
 >Tim> away, so does the support they provided; it's the same story for
 >Tim> Cygwin, and even for Linux and native Windows.
So, it is not just making the patch. You will have to compromise to
support it and not just go away.


Regards,
Josef


From removethis.kartic.krishnamurthy at gmail.com  Sun Feb 27 08:54:44 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Sun, 27 Feb 2005 13:54:44 GMT
Subject: Controlling Pc From Server?
In-Reply-To: <mailman.3116.1109511636.22381.python-list@python.org>
References: <mailman.3116.1109511636.22381.python-list@python.org>
Message-ID: <EikUd.39425$nC5.37142@twister.nyroc.rr.com>

andrea_gavana at tin.it said the following on 2/27/2005 8:40 AM:
> Hello Kartic & NG,
> 
>      Thank you for your prompt answer. In effect, I'm trying to work on
> a NT network of 6 PC (plus the server). Sorry to not have been clearer.
> Ideally, I'm trying to monitor the Internet activity of each client (PC)
> on this network (but I'm not a boss trying to control my emplyees, I'm just
> curious on it). I would like to know which PC is connected to Internet (by
> starting something like a "timer" for every PC, and then periodically check
> if a particular PC is connected or not). This should be done from the main
> server. 
> Did I make myself clear? Do you think it would be a huge task?
> 
> Sorry, it may be a very basic question, but thank you for your help.
> 
> Andrea.


Sounds like you are spying :-D

Your requirement may sound basic but I don't *think* it is simple to do. 
  Since you are using NT, you can probably see if there is some Network 
Usage auditing tool. This might cost you some $$ or may be you can find 
some shareware.

For a homegrown solution, if I am not mistaken, you will have to use 
libpcap (or pypcap) to monitor the packets being sent and received, 
taking care to exclude the local subnet (or your reporting will be 
skewed as packets sent to the monitoring server will also be included!). 
You can check http://www.monkey.org/~dugsong/pypcap/ for more 
details...and may be for more ideas.

Thanks,
-Kartic


From recruitment.it at motorola.com  Fri Feb 18 02:19:07 2005
From: recruitment.it at motorola.com (Recruitment Italy-ZIT05)
Date: Fri, 18 Feb 2005 08:19:07 +0100
Subject: Out of Office AutoReply: Mail Delivery (failure recruitment.it@mo
	torola.com)
Message-ID: <0B072DCDF0F4D511A7EA00805FA784C806815D0D@zit05exm01.mtci.mot.com>

Grazie per avere inviato il suo CV. 
 
Stiamo per disattivare la presente casella di posta elettronica e pertanto non avremo la possibilit? di archiviare la sua candidatura. Le suggeriamo di visitare il nostro portale di recruitment  www.motorolacareers.com dove potr?, se interessato,  informarsi sulle selezioni in corso in Italia e nel resto del mondo. 
Per permetterci di valutare la sua applicazione a fronte delle opportunit? di inserimento, compili i campi proposti e alleghi dettagliato CV in formato word, comprendente motivazione alla posizione e autorizzazione al trattamento dei dati personali ai sensi della L. 196/03. 
Verranno prese in considerazione soltanto le applicazioni in linea con il profilo atteso. 
Motorola rivolge le sue ricerche a candidature di entrambi i sessi ai sensi della L. 903/77. 
 

Cordiali saluti,
 
Motorola Electronics SpA
Ufficio Risorse Umane - Selezione del Personale
www.motorolacareers.com



From alefnula at gmail.com  Wed Feb 16 10:56:16 2005
From: alefnula at gmail.com (Viktor)
Date: 16 Feb 2005 07:56:16 -0800
Subject: Stable GUI
In-Reply-To: <1108564589.069982.71680@o13g2000cwo.googlegroups.com>
References: <c0e7fd79.0502160619.565eb40e@posting.google.com>
	<1108564589.069982.71680@o13g2000cwo.googlegroups.com>
Message-ID: <1108569376.721830.67370@o13g2000cwo.googlegroups.com>

Lars wrote:
> Maybe you should describe your particular application and the reasons
> why you really need lightspeed widget rendering ? Stability goes
> without saying:)

It's a GUI for some database input, output routines. It sopouse to wark
24h/day, and about 150 input-outputs/h.

Fast: Because it's going to work on some old machines PI or PII, so I
don't need any *lightspeed*, but I don't wan't to wait 5s to open a new
Frame or something like that.
Stable: I tought that thay are, but wxPython broke on some simple test
programs that came with wxPython-demo. Tkinter newer broke, but neather
the programs I wrote were somthing complicated.

Thanks



From adam at cognitcorp.com  Sun Feb  6 23:21:52 2005
From: adam at cognitcorp.com (Adam DePrince)
Date: Sun, 06 Feb 2005 23:21:52 -0500
Subject: pickle/marshal internal format 'life
	expectancy'/backward	compatibility
In-Reply-To: <pan.2005.02.06.17.12.19.603193@philippecmartin.com>
References: <1107640264.7097.5.camel@localhost>
	<1f7befae05020514046ab10822@mail.gmail.com>
	<mailman.2011.1107674438.22381.python-list@python.org>
	<pan.2005.02.06.17.12.19.603193@philippecmartin.com>
Message-ID: <1107750112.3850.49.camel@localhost.localdomain>

On Sun, 2005-02-06 at 12:12, Philippe C. Martin wrote:
> > How complicated is your data structure?  Might you just store:
> 
> that's the thing: I don't want to know: My goal is to be able to design

You must know.  Marshal and pickle both have limits on what they can
serialize.  

> my SC applications without having to change the file system every time I
> wish to add/subtract data to be store - I should say 'constant' data to be
> stored for this pickle solution would only work with data that the SC
> application just stores but does not understand/nor needs to.
> For instance, the data structure could simple have a name and address to
> start with (when the cards get issued) then the customer might want to add
> the person's pictures. In such a case, I would not have to release a new
> smart card application (could be burned in the silicon) but simply load
> the new structure at issuance time.

I don't see the problem.  What I proposed was merely a different way of
serializing your data.  The purpose of my simple signing scheme was not
to replace whatever services might be offered by the card, but to make
sure that the data you are reading into your python application was
written by you as a hedge against malicious data.   Can I, as a user of
said card, change the data in the pickle?  If so, when you load the
pickle back into python you need to confirm that it is a sane pickle
that you wrote earlier.  

- Adam

Adam DePrince 




From deetsNOSPAM at web.de  Sat Feb 19 10:01:40 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sat, 19 Feb 2005 16:01:40 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr> <cv7k8e$4pa$03$1@news.t-online.com>
Message-ID: <cv7kci$4pa$03$2@news.t-online.com>

> Unnecessary and deliberately provoking question - python is taken
> seriously, e.g. by multi-billion dollar companies like google and zope.

Of course zope corporation is not amongst the multi-billion dollar companies
- by now. But who knows :)

-- 
Regards,

Diez B. Roggisch


From onurb at xiludom.gro  Fri Feb 11 09:17:44 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Fri, 11 Feb 2005 15:17:44 +0100
Subject: [NooB] Using Escape Sesquences with Strings...
In-Reply-To: <614c778e.0502110329.2d4e7e73@posting.google.com>
References: <614c778e.0502110329.2d4e7e73@posting.google.com>
Message-ID: <420cbe89$0$526$636a15ce@news.free.fr>

administrata wrote:
> Hello! :)
> I've reading 'Python Programmin for the Absolute beginner'.
> I got questions which is...
> 
> print "\t - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "
> 
> rock = """
> Igneous          Sedimentary          Metamorphic
> 
> Lava             Grains               Marble
> Ramdom crystals  Layer                Bands
> Granite          Salt                 Schist
> Intrusive        Weathering           Heat + Pressure
>                  Deposition           Change"""
> print \trock
> 
> print "\t - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "
> 
> error occurs!
> 
> I don't know how to \t The variable.

see Daniel's answer for the why.
Now for the how, I guess you want a tab on each line so you have two 
solutions :
1/ putting the tabs in the string:
rock = """
\tIgneous          Sedimentary          Metamorphic

\tLava             Grains               Marble
\tRamdom crystals  Layer                Bands
\tGranite          Salt                 Schist
\tIntrusive        Weathering           Heat + Pressure
\t                 Deposition           Change"""

print rock

2/ adding the tabs before printing:
rock = """
Igneous          Sedimentary          Metamorphic

Lava             Grains               Marble
Ramdom crystals  Layer                Bands
Granite          Salt                 Schist
Intrusive        Weathering           Heat + Pressure
                  Deposition           Change"""


for line in rock.split("\n"):
   print "\t%s" % line

HTH,
-- 
bruno desthuilliers
ruby -e "print 'onurb at xiludom.gro'.split('@').collect{|p| 
p.split('.').collect{|w| w.reverse}.join('.')}.join('@')"
--


From fredrik at pythonware.com  Thu Feb 10 14:37:48 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 10 Feb 2005 20:37:48 +0100
Subject: sre is broken in SuSE 9.2
References: <mailman.2299.1108029731.22381.python-list@python.org><1108060527.378911.146240@o13g2000cwo.googlegroups.com>
	<cugc2v$i8u$1@swifty.westend.com>
Message-ID: <cugd2h$f6i$1@sea.gmane.org>

Peter Maas wrote:

>> To summarize the discussion: either it's a bug in glibc or there is an
>> option to specify modern POSIX locale. POSIX locale consist of
>> characters from the portable character set, unicode is certainly
>> portable.
>
> What about the environment variable LANG? I have SuSE 9.1 and
> LANG = de_DE.UTF-8. Your example is running well on my computer.

Python's Unicode subsystem shouldn't depend on the system's LANG
setting.

</F> 





From pinard at iro.umontreal.ca  Fri Feb 25 08:22:52 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Fri, 25 Feb 2005 08:22:52 -0500
Subject: Trees
In-Reply-To: <421EBF0B.8050902@psi.com.au>
References: <421EBF0B.8050902@psi.com.au>
Message-ID: <20050225132252.GA28914@phenix.progiciels-bpi.ca>

[Alex Le Dain]

> Is there a generic "tree" module that can enable me to sort and use
> trees (and nodes). Basically having methods such as .AddNode(),
> .GetAllChildren(), .FindNode() etc.

> Is this handled natively with any of the core modules?

Using only standard Python, look at the suite of `xml...' modules.

> cheers, Alex.

P.S. - Your signature and company disclaimer use more than 30 lines.
That's really a lot.  I hope you can bring them down to reason! :-)

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From ncoghlan at iinet.net.au  Fri Feb 11 06:03:23 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 11 Feb 2005 21:03:23 +1000
Subject: convert list of tuples into several lists
In-Reply-To: <YZadnQP52-Gs55bfRVn-qQ@powergate.ca>
References: <cud40u$vqb$01$1@news.t-online.com>	<36uihlF58p63iU1@individual.net>	<_cWdnZN4wO418pffRVn-qA@comcast.com>	<XL6dnRJrPeesD5ffRVn-uw@powergate.ca>	<Z9ednTx4E-VaC5ffRVn-2Q@comcast.com>	<mailman.2315.1108045657.22381.python-list@python.org>
	<YZadnQP52-Gs55bfRVn-qQ@powergate.ca>
Message-ID: <420C90FB.5010405@iinet.net.au>

Peter Hansen wrote:
> Is there some unexpected limit to the number of arguments that may be
> passed with the *args format (say, "256 function arguments maximum are
> supported by Python"), or is this concern just because of the raw
> memory inherently used by the tuple?
> 
> In other words, if one is confident that one can whip tuples of the
> required size around without using up available memory, would there
> still be such a concern about the *args "abuse"?

I'm not aware of any arbitrary limits in that code, since it does pass real 
tuple objects around. Then again, it's not an area of the code I'm particularly 
familiar with. . .

However, if there was a limit other than the amount of available memory though, 
I expect Guido would have said so explicitly. As it is, the concern seems to be 
that there is a potentially large copy operation triggered by an innocent 
looking function call.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From http  Thu Feb  3 20:12:20 2005
From: http (Paul Rubin)
Date: 03 Feb 2005 17:12:20 -0800
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<mailman.1857.1107479377.22381.python-list@python.org>
Message-ID: <7xis59qgaz.fsf@ruckus.brouhaha.com>

Simon Wittber <simonwittber at gmail.com> writes:
> Slow is such an ambiguous term. Do you mean the pages are slow to
> render in a browser, or slow to be fetched from the server, or the
> server is slow to respond to requests? What is slow?

The server is slow to respond to requests.  Browser rendering is
independent of the server architecture and "slow to be fetched from
the server" sounds like it means low network speed.  I'm talking about
the very familiar experience of clicking a link and then waiting,
waiting, waiting for the page to load.  You rarely see that happen
with Ebay or Google.  It happens all the time with Wikipedia.


From ilias at lazaridis.com  Sun Feb 20 13:28:37 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sun, 20 Feb 2005 20:28:37 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <4218cafe$0$8790$9b622d9e@news.freenet.de>
References: <cuo71l$gig$1@usenet.otenet.gr>	<42172136$0$27576$9b622d9e@news.freenet.de>	<cv7i57$d0v$1@usenet.otenet.gr>	<42185b05$0$15460$9b622d9e@news.freenet.de>	<cv9sdo$69n$3@usenet.otenet.gr>	<42189527$0$6260$9b622d9e@news.freenet.de>	<cvadcj$mqc$1@usenet.otenet.gr>
	<mailman.2866.1108917759.22381.python-list@python.org>
	<cvafgu$2lk$1@usenet.otenet.gr>
	<4218cafe$0$8790$9b622d9e@news.freenet.de>
Message-ID: <cvaksm$q0o$1@usenet.otenet.gr>

Martin v. L?wis wrote:
> Ilias Lazaridis wrote:
> 
>> Should I take answers serious?
[...]
>> Answer from people which do not respect coherence of writings?
[...]
>> I still detect the coherence.
>>
>> As most people in this group will detect the coherence.
> 
> I don't. The second fragment is not even correct English
[...] - (limits of AI)

.

-- 
http://lazaridis.com


From http  Mon Feb 14 18:36:32 2005
From: http (Paul Rubin)
Date: 14 Feb 2005 15:36:32 -0800
Subject: is there a safe marshaler?
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<1108051828.483222.62670@z14g2000cwz.googlegroups.com>
	<7xmzu6q4cv.fsf@ruckus.brouhaha.com>
	<4211185b$0$28982$e4fe514c@news.xs4all.nl>
	<7xbramzt1c.fsf@ruckus.brouhaha.com>
	<42112b1e$0$28978$e4fe514c@news.xs4all.nl>
	<7xacq6sqej.fsf@ruckus.brouhaha.com>
	<421130ae$0$28984$e4fe514c@news.xs4all.nl>
Message-ID: <7x3bvyiuin.fsf@ruckus.brouhaha.com>

Irmen de Jong <irmen.NOSPAM at xs4all.nl> writes:
> > Well, ok, if you trust then other end then I think it's enough to just
> > authenticate all the pickles (say using hmac.py) without needing
> > something as heavyweight as SSL.
> 
> An interesting idea that hadn't crossed my mind yet.  Pyro *does*
> already have connection authentication that uses md5 (and hmac since
> 3.5beta) with a shared secret, but after that, the communication is
> done in plaintext so to speak.

Yes, that's what I meant, using hmac to authenticate using a shared secret,
sending the rest in the clear.  Note you should also put sequence numbers
in the messages, to stop the attacker from fooling you by selectively
deleting or replaying messages.
> 
> You should not want to expose a Pyro service to the internet because
> Python doesn't have Java's security model and sandboxing, that are
> used with RMI. Pyro has a few features that are very powerful
> but also require the use of intrinsic insecure Python code (namely,
> pickle, and marshal).

Can you say some more about this?  Does RMI really rely on sandboxes,
if you don't send code around, but just expose operations on server
side objects?

I don't think marshal is inherently insecure, since the unmarshaller
doesn't itself execute any marshalled code.  It apparently has some
bugs that can confuse it if you send it a malformed marshalled string,
but those can be fixed.  Pickle is inherently insecure because of how
it calls class constructors.

> Just look at the recent security advisory about the XMLRPC server
> that comes with Python.... it's much more primitive than Pyro is,
> but even that one was insecure.

I haven't looked at that bug carefully yet but yes, anything exposed
to the internet has to be done very carefully, and XMLRPC missed something.

> I wouldn't put a Java RMI server or xyz CORBA server or whatever
> kind of unrestricted API open on the internet anyway.
> Am I rational or paranoid?

I haven't used Java enough to advise you on this, but I thought they
were supposed to be ok to expose to the internet.  Certainly the whole
idea of .NET is to let you securely provide RPC services (excuse me
for a moment while I try to stop laughing for mentioning security and
Microsoft in the same sentence).  And lots of people use things like
SOAP for that.


From hans at zephyrfalcon.org  Sun Feb 20 01:03:44 2005
From: hans at zephyrfalcon.org (Hans Nowak)
Date: Sun, 20 Feb 2005 01:03:44 -0500
Subject: How Do I get Know What Attributes/Functions In A Class?
In-Reply-To: <1108870842.095282.54200@z14g2000cwz.googlegroups.com>
References: <1108870842.095282.54200@z14g2000cwz.googlegroups.com>
Message-ID: <d1c02$42182841$a228dd19$19743@ispnews.usenetserver.com>

steven at lczmsoft.com wrote:
> Hi,
> 
> I'm new to python.  Given a class, how can I get know what
> attributes/functins in it without dig into the source?

Use the dir function:

 >>> from smtplib import SMTP
 >>> dir(SMTP)
['__doc__', '__init__', '__module__', 'close', 'connect', 'data', 
'debuglevel', 'docmd', 'does_esmtp', 'ehlo', 'ehlo_resp', 'expn', 
'file', 'getreply', 'has_extn', 'helo', 'helo_resp', 'help', 'login', 
'mail', 'noop', 'putcmd', 'quit', 'rcpt', 'rset', 'send', 'sendmail', 
'set_debuglevel', 'starttls', 'verify', 'vrfy']

To get more detailed information than just a list of names, see the 
inspect module.

-- 
Hans Nowak
http://zephyrfalcon.org/


From mefjr75 at hotmail.com  Sat Feb 26 16:23:27 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 26 Feb 2005 13:23:27 -0800
Subject: remove strings from source
References: <2ab23d7a.0502260638.311cc5e9@posting.google.com>
Message-ID: <1109453007.696658.227900@g14g2000cwa.googlegroups.com>

qwweeeit wrote:
> For a python code I am writing I need to remove all strings
> definitions from source and substitute them with a place-holder.
>
> To make clearer:
> line 45  sVar="this is the string assigned to sVar"
> must be converted in:
> line 45 sVar=s00001
>
> Such substitution is recorded in a file under:
> s0001[line 45]="this is the string assigned to sVar"
>
> For curious guys:
> I am trying to implement a cross variable reference tool and the
> variability (in lenght) of the string definitions (expecially if
> multi-line) can cause display problems.
>
> I need your help in correctly identifying the strings (also embedding
> the r'xx..' or u'yy...' as part of the string definition). The
problem
> is mainly on the multi-line definitions or in cached strings
> (embedding chr() definitions or escape sequences).

Hello,
I have written a few python parsers before.
Here is my attempt :)
# string_mapper.py
from __future__ import generators# python 2.2
import keyword, os, sys, traceback
import cStringIO, token, tokenize

def StringNamer(num=0):
    '''This is a name creating generator'''
    while 1:
        num += 1
        stringname = 's'+str(num).zfill(6)
        yield stringname

class ReplaceParser(object):
    """
>>> filein = open('yourfilehere.py').read()
>>> replacer = ReplaceParser(filein, out=sys.stdout)
>>> replacer.format()
>>> replacer.StringMap
    """

    def __init__(self, raw, out=sys.stdout):
        ''' Store the source text.
        '''
        self.raw =raw.expandtabs().strip()
        self.out = out
        self.StringName = StringNamer()
        self.StringMap = {}

    def format(self):
        ''' Parse and send the source.
        '''
        self.lines = [0, 0]
        pos = 0
        self.temp = cStringIO.StringIO()
        while 1:
            pos = self.raw.find('\n', pos) + 1
            if not pos: break
            self.lines.append(pos)
        self.lines.append(len(self.raw))
        self.pos = 0
        text = cStringIO.StringIO(self.raw)
        try:
            tokenize.tokenize(text.readline, self)
        except tokenize.TokenError, ex:
            traceback.print_exc()

    def __call__(self, toktype, toktext, (srow,scol),
                   (erow,ecol), line):
        ''' Token handler.
        '''
        oldpos = self.pos
        newpos = self.lines[srow] + scol
        self.pos = newpos + len(toktext)
        if toktype in [token.NEWLINE, tokenize.NL]:
            self.out.write('\n')
            return
        if newpos > oldpos:
            self.out.write(self.raw[oldpos:newpos])
        if toktype in [token.INDENT, token.DEDENT]:
            self.pos = newpos
            return
        if (toktype == token.STRING):
            sname = self.StringName.next()
            self.StringMap[sname] = toktext
            toktext = sname
        self.out.write(toktext)
        self.out.flush()
        return

hth,
M.E.Farmer



From alexrait at gmail.com  Thu Feb  3 05:48:58 2005
From: alexrait at gmail.com (alexrait1)
Date: 3 Feb 2005 02:48:58 -0800
Subject: pyGTK warning
Message-ID: <1107427738.301191.209900@z14g2000cwz.googlegroups.com>

Hello,
GtkWarning: gtk_widget_grab_default: assertion `GTK_WIDGET_CAN_DEFAULT
(widget)' failed

I am using python gtk binding with glade.

All I did was to create a gui interface with glade (Stored as xml) and
to load it with
gtk.glade.XML("filename.glade");
Then I run it with gkt.main() and got this warning..
what can it possible be, since google seems not to know about it.
thanx.



From vegeta.z at gmail.com  Mon Feb 14 01:40:44 2005
From: vegeta.z at gmail.com (vegetax)
Date: Mon, 14 Feb 2005 02:40:44 -0400
Subject: custom classes in sets
Message-ID: <cuph15$esp$1@sea.gmane.org>

How can i make my custom class an element of a set?

class Cfile:
  def __init__(s,path): s.path = path

  def __eq__(s,other):
   print 'inside equals'
   return not os.popen('cmp %s %s' % (s.path,other.path)).read()

  def __hashcode__(s): return s.path.__hashcode__()

the idea is that it accepts file paths and construct a set of unique 
files (the command "cmp" compares files byte by byte.),the files can
have different paths but the same content

but the method __eq__ is never called



From deetsNOSPAM at web.de  Wed Feb  9 06:46:36 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 09 Feb 2005 12:46:36 +0100
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Feb  9)
References: <cucodb$g0b$1@lairds.us>
Message-ID: <36ubgrF56cad1U1@individual.net>

> "We should concentrate on *real* problems, ones that exist in real code,
> not ones that mostly exist in wild-eyed prose that consists of
> predictions of pain and death that conspicuously fail to occur, no matter
> how many times they are  repeated or we are exhorted to heed them or face
> our doom." -- Jeremy Bowers

Amen.

-- 
Regards,

Diez B. Roggisch


From reinhold-birkenfeld-nospam at wolke7.net  Sun Feb  6 09:11:26 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Sun, 06 Feb 2005 15:11:26 +0100
Subject: Python versus Perl ?
In-Reply-To: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
Message-ID: <36mmseF54e67mU1@individual.net>

surfunbear at yahoo.com wrote:
>  I've read some posts on Perl versus Python and studied a bit of my
> Python book.
> 
>  I'm a software engineer, familiar with C++ objected oriented
> development, but have been using Perl because it is great for pattern
> matching, text processing, and automated testing. Our company is really
> fixated on risk managnemt and the only way I can do enough testing
> without working overtime (which some people have ended up doing) is by
> automating my testing. That's what got me started on Perl.
> 
>  I've read that many people prefer Python and that it is better than
> Perl. However, I want to ask a few other questions.

"Better than Perl" is a very general statement. In my personal opinion,
this is true for every project being larger than one file of ~200 LOC.

> 1. Perl seems to have alot of packaged utilities available through
> CPAN, the comprehensive perl network. These can aid in building
> parsers, web development, perl DBI is heavily used. This seems to be a
> very important benifit. I'm not sure that Python is as extenive at all
> in that regard ?

There are the Python Package Index (PyPI), the Vaults of Parnassus, and
when you don't find a needed package there, just come and ask here;
almost always a decent solution is found.

A thing similar to CPAN is being worked on by various people, though I
don't know when it will become mature.

> Perl also has excellent pattern matching compared to
> sed, not sure about how Python measures up,
>  but this seems to make perl ideally suited to text processing.

Python has regular expressions much like Perl. The only difference is
that Perl carries syntactic support for them, while in Python regular
expressions are ordinary objects with methods etc.

> 2. Python is apparantly better at object oriented. Perl has some kind
> of name spacing, I have used that in a limited way. Does Perl use a
> cheap and less than optimal Object oriented approach ?
> That was what someone at work said, he advocates Python.
> Is it likely that Perl will improve it's object oriented features
> in the next few years ?

There is the Perl 6 movement, but when you read some of the docs at
http://dev.perl.org, you will come to the conclusion that

- Perl 6 lies at least 3-5 years in the future and
- it will be a huge mess. Someone here once said "Perl 6 is the ultimate
failure of Perl's philosophy". There may be split views about this...

> 3. Perl is installed on our system and alot of other systems.
> You don't have to make sys admins go out of there way to make it
> available. It's usualy allready there.

Same goes with Python; it is installed per default on most modern
Unices. Windows is a completely different chapter, however, Perl isn't
more widespread there.

> I also did a search of job
> postings on a popular website. 108 jobs where listed that require
> knowledge of Perl, only 17 listed required Python. Becomeing more
> familiar with Perl might then be usefull for ones resume ?

It doesn't harm, of course. Recent statistics about programmers'
salaries indicate, however, that Python ranks top (I somehow lost the URL).

> If Python is better than Perl, I'm curious how really significant
> those advantages are ?

Try to decide yourself. The Python tutorial and website are your friends.

Reinhold


From fredrik at pythonware.com  Thu Feb 17 02:53:22 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 17 Feb 2005 08:53:22 +0100
Subject: Problem using/installing numarray
References: <1108609122.631534.50720@g14g2000cwa.googlegroups.com>
Message-ID: <cv1ibn$ek3$1@sea.gmane.org>

<maxwell at ldc.upenn.edu> wrote:

>   ImportError: No module named _conv
> The file _conf.pyd exists, but my guess is that the .pyd suffix is not
> recognized under the CygWin version of Python.  (But that doesn't make
> sense...)

you can use imp.get_suffixes() to get a list of supported extensions.
here's the output from a stock python.org stock interpreter on WinXP:

>>> import imp
>>> imp.get_suffixes()
[('.pyd', 'rb', 3), ('.dll', 'rb', 3), ('.py', 'U', 1), ('.pyw', 'U', 1), ('.pyc', 'rb', 2)]

</F> 





From harlinseritt at yahoo.com  Thu Feb 24 20:31:31 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 24 Feb 2005 17:31:31 -0800
Subject: Best IDe
In-Reply-To: <0bvTd.52404$wc.42219@trnddc07>
References: <0bvTd.52404$wc.42219@trnddc07>
Message-ID: <1109295091.836841.78690@z14g2000cwz.googlegroups.com>

IDLE, PytonWin and SPE are all free and offer all of the important
features you'll see even in commercial IDE's.



From FBatista at uniFON.com.ar  Mon Feb 14 15:43:17 2005
From: FBatista at uniFON.com.ar (Batista, Facundo)
Date: Mon, 14 Feb 2005 17:43:17 -0300
Subject: two questions - no common theme
Message-ID: <A128D751272CD411BC9200508BC2194D053C7F88@escpl.tcp.com.ar>

[sean_mcilroy at yahoo.com]

#- Any help will be greatly appreciated.

It's always better to address two different questions in two different
mails, with appropiate subjects.

.    Facundo

Bit?cora De Vuelo: http://www.taniquetil.com.ar/plog
PyAr - Python Argentina: http://pyar.decode.com.ar/


  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
ADVERTENCIA.

La informaci?n contenida en este mensaje y cualquier archivo anexo al mismo,
son para uso exclusivo del destinatario y pueden contener informaci?n
confidencial o propietaria, cuya divulgaci?n es sancionada por la ley.
Si Ud. No es uno de los destinatarios consignados o la persona responsable
de hacer llegar este mensaje a los destinatarios consignados, no est?
autorizado a divulgar, copiar, distribuir o retener informaci?n (o parte de
ella) contenida en este mensaje. Por favor notif?quenos respondiendo al
remitente, borre el mensaje original y borre las copias (impresas o grabadas
en cualquier medio magn?tico) que pueda haber realizado del mismo.
Todas las opiniones contenidas en este mail son propias del autor del
mensaje y no necesariamente coinciden con las de Telef?nica Comunicaciones
Personales S.A. o alguna empresa asociada.
Los mensajes electr?nicos pueden ser alterados, motivo por el cual
Telef?nica Comunicaciones Personales S.A. no aceptar? ninguna obligaci?n
cualquiera sea el resultante de este mensaje.
Muchas Gracias.
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From williams13 at llnl.gov  Tue Feb  8 11:01:11 2005
From: williams13 at llnl.gov (Dean N. Williams)
Date: Tue, 08 Feb 2005 08:01:11 -0800
Subject: Building Python with Tcl/Tk on Cygwin_NT-5.1
In-Reply-To: <20050202133005.GE2472@tishler.net>
References: <41FF5A67.3090606@llnl.gov> <20050201125129.GA432@tishler.net>
	<41FFA7C9.4070308@llnl.gov> <20050202124435.GA2472@tishler.net>
	<4200D056.4010000@llnl.gov> <4200D22D.9070000@llnl.gov>
	<20050202133005.GE2472@tishler.net>
Message-ID: <4208E247.8030706@llnl.gov>



Dear Jason,

    I installed Cygwin on another Windows XP platform, this time I 
selected "ALL" for the setup installation. Everything appears to have 
been install just fine, except for when I do the "rebaseall" command. I 
am receiving the following error messages when I do the "rebaseall" 
command at the prompt:

$ rebaseall
/usr/bin/rebaseall: line 70: [: too many arguments
/usr/bin/rebaseall: line 75: [: too many arguments
/usr/bin/rebaseall: line 94: $TmpFile: ambiguous redirect
cannot read /cygdrive/c/Documents


    On my laptop installation everything works just fine. What is the 
difference?

    Thanks in advance and best regards,
                Dean

>Dean,
>
>Please keep your replies on-list.
>
>On Wed, Feb 02, 2005 at 05:14:21AM -0800, Dean N. Williams wrote:
>  
>
>>I am trying to do the following according to your notes:
>>
>>3. Due to issues with Cygwin's fork() and DLL base address conflicts,
>>one should rebase their Cygwin system to prevent fork() failures.  Use
>>the following procedure to rebase your system:
>>
>>   a. install the Cygwin rebase package (if necessary)
>>   b. shutdown all Cygwin processes
>>   c. start bash (do not use rxvt)
>>   d. execute rebaseall (in the bash window)
>>
>>I think this is why idle fails. So I did the above:
>>
>>[Dean Williams at ippc ...ASD_work/bin]$ rebaseall
>>ReBaseImage (/usr/bin/cygexpat-0.dll) failed with last error = 6
>>
>>What am I doing wrong here?
>>    
>>
>
>It appears you did not follow step b above.  Did you shutdown *all*
>Cygwin processes include services?
>
>Jason
>
>  
>



From xnews2 at fredp.lautre.net  Tue Feb  8 04:49:42 2005
From: xnews2 at fredp.lautre.net (Fred Pacquier)
Date: 08 Feb 2005 09:49:42 GMT
Subject: Big development in the GUI realm
References: <mailman.2149.1107853311.22381.python-list@python.org>
	<cua0eq$ecj$1@news1.ucsd.edu>
Message-ID: <Xns95F76DB6B1FD1PaCmAnRDLM@212.27.42.67>

Robert Kern <rkern at ucsd.edu> said :

>> that's Hanlon, not Heinlein.  to be on the safe side, I won't attempt
>> to attribute your mistake to anything.
> 
> Fair enough. The only time I've seen it in dead-tree print was in 
> Heinlein's _Time Enough For Love_, unattributed to anyone else. 
> Googlespace seems to be not entirely sure whether "Hanlon" is real or
> is a corruption of "Heinlein". Googling for quote attributions is a
> tricky proposition at best, though.
 
I don't know who Mr Hanlon is, but I've previously seen it attributed to 
Napoleon Buonaparte. Never been able to verify that either, though.

-- 
YAFAP : http://www.multimania.com/fredp/


From johann at rocholl.net  Thu Feb  3 18:31:02 2005
From: johann at rocholl.net (Johann C. Rocholl)
Date: Fri, 4 Feb 2005 00:31:02 +0100
Subject: Regular expression match objects - compact syntax?
Message-ID: <20050203233102.GA8445@rocholl.net>

Hello python-list,

I have a question about the match objects that are returned from the
match() method of compiled regular expression objects from the 're'
module. To parse Postscript T1 fonts that were disassembled into
plaintext, I came up with the following code:

import re
rmoveto = re.compile('^\s*(-?\d+)\s+(-?\d+)\s+rmoveto$')
rlineto = re.compile('^\s*(-?\d+)\s+(-?\d+)\s+rlineto$')
# ... other expressions with up to six paren groups

f = open(filename, 'r')
for line in f.readlines():
	
    m = rmoveto.match(line)
    if m:
        x = x + int(m.group(1))
        y = y + int(m.group(2))
        glyph.append(('move', (x, y)))
	continue

    m = rlineto.match(line)
    if m:
        x = x + int(m.group(1))
        y = y + int(m.group(2))
        glyph.append(('line', (x, y)))
	continue

    # ... and so forth for the other expressions

Now here is my question: is there a simple way to join the following
two python code lines:
    m = rmoveto.match(line)
    if m:
into one single line like in the following:
    if rmoveto.match(line):
        x = x + int(rmoveto.group(1))
        y = y + int(rmoveto.group(2))
        glyph.append(('move', (x, y)))
    elif rlineto.match(line):
        # ...

The above syntax does not work because the compiled regular expression
object rmoveto doesn't provide a method called group(), as it comes
from module 're'. The obsolete package 'regex' did provide this, if I
read the docs correctly.

As a workaround, I also tried to use a nested function like this:

def match(expr):
    m = expr.match(line)
    return m

if match(rmoveto):
    x = x + int(m.group(1))
    # ...

This approach failed because the match function has its own local m,
so it didn't update the outer m. I couldn't use 'global m' either
because the whole thing, including the outer m, happens to be inside a
function, too.

How do you people handle this?

Thanks for your time,
Johann C. Rocholl


From just at xs4all.nl  Sat Feb 26 11:36:43 2005
From: just at xs4all.nl (Just)
Date: Sat, 26 Feb 2005 17:36:43 +0100
Subject: any Python equivalent of Math::Polynomial::Solve?
References: <just-420C1F.16423926022005@news1.news.xs4all.nl>
	<mailman.3092.1109434899.22381.python-list@python.org>
Message-ID: <just-ACE943.17364326022005@news1.news.xs4all.nl>

In article <mailman.3092.1109434899.22381.python-list at python.org>,
 Nick Coghlan <ncoghlan at iinet.net.au> wrote:

> Just wrote:
> > While googling for a non-linear equation solver, I found 
> > Math::Polynomial::Solve in CPAN. It seems a great little module, except 
> > it's not Python... I'm especially looking for its poly_root() 
> > functionality (which solves arbitrary polynomials). Does anyone know of 
> > a Python module/package that implements that?
> > 
> > Just
> 
> Does SciPy do what you want? Specifically Scientific.Functions.FindRoot [1] & 
> Scientific.Functions.Polynomial [2]
> 
> Regards,
> Nick.
> 
> [1]
> http://starship.python.net/~hinsen/ScientificPython/ScientificPythonManual/Sci
> entific_9.html
> [2]
> http://starship.python.net/~hinsen/ScientificPython/ScientificPythonManual/Sci
> entific_13.html

(Hm, I had the impression that scipy != Konrad Hinsen's Scientific 
module.)

I had played with [1], but it "only" calculates one root, and I need all 
roots (specifically, for a quintic equation). [2] doesn't seem to be a 
solver?

Just


From ods at strana.ru  Thu Feb 10 12:16:30 2005
From: ods at strana.ru (Denis S. Otkidach)
Date: Thu, 10 Feb 2005 20:16:30 +0300
Subject: sre is broken in SuSE 9.2
In-Reply-To: <cug30s$smu$1@sea.gmane.org>
References: <mailman.2299.1108029731.22381.python-list@python.org>
	<cufu9t$j37$1@news.sap-ag.de>
	<20050210184503.5ffd2aa8.ods@strana.ru>
	<cug30s$smu$1@sea.gmane.org>
Message-ID: <20050210201630.512afe78.ods@strana.ru>

On Thu, 10 Feb 2005 17:46:06 +0100
"Fredrik Lundh" <fredrik at pythonware.com> wrote:

> > Can --with-wctype-functions configure option be the
> > source of problem?
> 
> yes.
> 
> that option disables Python's own Unicode database, and relies on the C library's
> wctype.h (iswalpha, etc) to behave properly for Unicode characters.  this isn't true
> for all environments.
> 
> is this an official SuSE release?  do they often release stuff that hasn't been tested
> at all?

Yes, it's official release:
# rpm -qi python
Name        : python                       Relocations: (not relocatable)
Version     : 2.3.4                             Vendor: SUSE LINUX AG, Nuernberg, Germany
Release     : 3                             Build Date: Tue Oct  5 02:28:25 2004
Install date: Fri Jan 28 13:53:49 2005      Build Host: gambey.suse.de
Group       : Development/Languages/Python   Source RPM: python-2.3.4-3.src.rpm
Size        : 15108594                         License: Artistic License, Other License(s), see package
Signature   : DSA/SHA1, Tue Oct  5 02:42:38 2004, Key ID a84edae89c800aca
Packager    : http://www.suse.de/feedback
URL         : http://www.python.org/
Summary     : Python Interpreter
<snip>

BTW, where have they found something with Artistic License in Python?

-- 
Denis S. Otkidach
http://www.python.ru/      [ru]


From thomas at thomas-lotze.de  Tue Feb 15 12:25:14 2005
From: thomas at thomas-lotze.de (Thomas Lotze)
Date: Tue, 15 Feb 2005 18:25:14 +0100
Subject: Copying data between file-like objects
References: <pan.2005.02.15.09.01.29.555879@ID-174572.user.uni-berlin.de>
	<mailman.2634.1108486380.22381.python-list@python.org>
Message-ID: <pan.2005.02.15.17.25.13.828572@ID-174572.user.uni-berlin.de>

Fredrik Lundh wrote:

> if f2 isn't too large, reading lots of data in one operation is often the most
> efficient way (trust me, the memory system is a lot faster than your disk)

Sure.

> if you don't know how large f2 can be, use shutil.copyfileobj:
> 
>     >>> help(shutil.copyfileobj)
>     Help on function copyfileobj in module shutil:
> 
>     copyfileobj(fsrc, fdst, length=16384)
>         copy data from file-like object fsrc to file-like object fdst

This sounds like what I was looking for. Thanks for the pointer.
However, the following doesn't seem like anything is being copied:

>>> from StringIO import StringIO
>>> from shutil import copyfileobj
>>> s = StringIO()
>>> s2 = StringIO()
>>> s.write('asdf')
>>> copyfileobj(s, s2)
>>> s2.getvalue()
''

> to copy stringio objects, you can use f1 = StringIO(f2.getvalue()).

But this should have the same problem as using read(): a string will be
created on the way which contains all the content.

> why you
> would want/need to do this is more than I can figure out, though...

Because I want to manipulate a copy of the data and be able to compare it
to the original afterwards.

Another thing I'd like to do is copy parts of a StringIO object's content
to another object. This doesn't seem possible with any shutil method. Any
idea on that?

What one can really wonder, I admit, is why the difference between holding
data two or three times in memory matters that much, especially if the
latter is only for a short time. But as I'm going to use the code that
handles the long string as a core component to some application, I'd like
to make it behave as well as possible.

-- 
Thomas




From simoninusa2001 at yahoo.co.uk  Thu Feb 17 12:02:41 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 17 Feb 2005 09:02:41 -0800
Subject: Pausing a program - poll/sleep/threads?
In-Reply-To: <1108642815.203982.140210@g14g2000cwa.googlegroups.com>
References: <1108625477.222091.34680@l41g2000cwc.googlegroups.com>
	<7xekffr5ts.fsf@ruckus.brouhaha.com>
	<1108642815.203982.140210@g14g2000cwa.googlegroups.com>
Message-ID: <1108659761.226825.178390@f14g2000cwb.googlegroups.com>

I don't think time.sleep() will work too well, I think it will cause
the program to hang around in the foreground, and prevent the GUI
updating.

I'll give it a try just to make sure, as I can't figure out the
signal/alarm thing (the alarm only seems to trigger when I click a
button, not after n-seconds....



From snail at objmedia.demon.co.uk  Mon Feb 14 16:01:18 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Mon, 14 Feb 2005 21:01:18 +0000
Subject: - E02 - Support for MinGW Open Source Compiler
References: <ECBA357DDED63B4995F5C1F5CBE5B1E802107A93@its-xchg4.massey.ac.nz>
	<mailman.2567.1108413263.22381.python-list@python.org>
Message-ID: <ZCTpt0veGRECFwBP@objmedia.demon.co.uk>

In message <mailman.2567.1108413263.22381.python-list at python.org>, Tony 
Meyer <t-meyer at ihug.co.nz> writes
>There are also other conditions, to do with what you are redistributing it
>with (it can't be alone), and including a particular type of license with
>your redistribution.  (It appears that Python 2.4 doesn't correctly follow
>this at the moment, IIRC).

Lots of points from Tony stating a different point of view. I'll assume 
you are correct. However, surely if you Python 2.4 installed they'll 
have this DLL anyway, so the point is moot, unless of course, Python 2.4 
is in breach as well.
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From aleaxit at yahoo.com  Mon Feb  7 09:24:11 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 7 Feb 2005 15:24:11 +0100
Subject: Confused with methods
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>
	<slrnd0enor.26q.apardon@rcpc42.vub.ac.be>
Message-ID: <1grmd4z.1tlm4e61650vedN%aleaxit@yahoo.com>

Antoon Pardon <apardon at forel.vub.ac.be> wrote:

> Op 2005-02-06, Alex Martelli schreef <aleaxit at yahoo.com>:
> >  
> >> Isn't that inconsistent?
> >
> > That Python has many callable types, not all of which are descriptors?
> > I don't see any inconsistency there.  Sure, a more generalized currying
> > (argument-prebinding) capability would be more powerful, but not more
> > consistent (there's a PEP about that, I believe).
> 
> I think python is a bit inconsistent here, by using 'def' for
> two different things.

It doesn't.

> I think it would have been more consistent
> if def always produces a function

It does.

def g(self): pass
class A(object):
  f = g

class B(object):
  def f(self): pass

class C(object): pass
C.f = g

class D(object):
  f = B.f

These four classes are essentially equivalent.  def always produces a
function object and binds it to the name coming after keyword 'def'.
Any such function object, no matter how produced and how bound hither
and thither, always behaves in exactly the same way.

You're free to like or dislike this arrangement, but calling it
"inconsistent" is a madman's folly, as it is TOTALLY consistent.


Alex
 


From fumanchu at amor.org  Fri Feb  4 13:31:19 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Fri, 4 Feb 2005 10:31:19 -0800
Subject: Persistence design [was: RE: OT: why are LAMP sites slow?]
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E3398367@exchange.hqamor.amorhq.net>

Jack Diederich wrote:
> *ding*ding*ding*  The biggest mistake I've made most 
> frequently is using
> a database in applications.  YAGNI.  Using a database at all has it's
> own overhead.  Using a database badly is deadly.  Most sites would
> benefit from ripping out the database and doing something simpler.
> Refactoring a database on a live system is a giant pain in the ass,
> simpler file-based approaches make incremental updates easier.
> 
> The Wikipedia example has been thrown around, I haven't looked at the
> code either;  except for search why would they need a database to
> look up an individual WikiWord?  Going to the database 
> requires reading
> an index when pickle.load(open('words/W/WikiWord')) would 
> seem sufficient.
> 
...
> 
> If there is interest I'll follow up with some details on my own LAMP
> software which does live reports on gigs of data and - you 
> guessed it -
> I regret it is database backed.  That story also involves why 
> I started
> using Python (the prototype was in PHP).

I'd be interested, if only selfishly to hear more potential use cases
for *my* projects. ;)

One of my goals for Dejavu* (my ORM) is to abstract persistence to the
point that you can easily test your actual, live dataset against many
potential storage mechanisms (i.e. multiple DB's, but also shelve,
etc.). I need to finish the migration tools, but it's well on the way.


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org

* http://www.aminus.org/rbre/python


From fuzzyman at gmail.com  Mon Feb 14 03:45:28 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 14 Feb 2005 00:45:28 -0800
Subject: AES crypto in pure Python?
In-Reply-To: <1108333363.915962.160440@z14g2000cwz.googlegroups.com>
References: <1108333363.915962.160440@z14g2000cwz.googlegroups.com>
Message-ID: <1108370728.858491.270220@l41g2000cwc.googlegroups.com>


andrew.fabbro at gmail.com wrote:
> I'm looking for an implementation of AES (the Advanced Encryption
> Standard) in pure Python.  I'm aware of pycrypto, but that uses C
code.
>  I'm hoping to find something that only uses Python...I'm willing to
> trade speed for portability, since my application is designed for
> several different platforms.
>
> Anyone know if this has been done?
>

I'm afraid my internet is heavily restricted, so I can't check for you.
*But* there is a 'tlslite' module which implements several encryption
methods in pure python. I *think* AES is one of them.

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml


> Thanks,
> 
> 
> -AF



From usenet_spam at janc.invalid  Wed Feb  9 06:58:58 2005
From: usenet_spam at janc.invalid (JanC)
Date: Wed, 09 Feb 2005 11:58:58 GMT
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<4207c8db$0$21623$a1866201@visi.com>
	<cub12p$pke$1@achot.icm.edu.pl>
	<pan.2005.02.08.14.02.31.939729@jerf.org>
Message-ID: <Xns95F88411F1E3AJanC@213.118.79.171>

Jeremy Bowers schreef:

> Copyright-based models can't handle modern computer programs,

Most countries have computer program specific parts in their copyright 
laws...

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From plb at iotk.com  Tue Feb  8 10:14:44 2005
From: plb at iotk.com (plb)
Date: 8 Feb 2005 07:14:44 -0800
Subject: How to keep a module with the same name as a module it is
	importing from importing itself?
In-Reply-To: <mailman.2177.1107868949.22381.python-list@python.org>
References: <1107866562.822745.53480@o13g2000cwo.googlegroups.com>
	<mailman.2177.1107868949.22381.python-list@python.org>
Message-ID: <1107875684.415519.133450@c13g2000cwb.googlegroups.com>

Good call!  The following snippet solved my problems portably.

path = sys.path[1:]
file, filename, description = imp.find_module('logging', path)
logging = imp.load_module('logging', file, filename, description)

Thanks!

--Peter



From peter at engcorp.com  Thu Feb  3 08:39:52 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 03 Feb 2005 08:39:52 -0500
Subject: Finding user's home dir
In-Reply-To: <mailman.1800.1107419518.22381.python-list@python.org>
References: <5i9rtc.rq31.ln@orion.homeinvalid>
	<mailman.1800.1107419518.22381.python-list@python.org>
Message-ID: <GcKdnaOlaN41tJ_fRVn-rg@powergate.ca>

Miki Tebeka wrote:
>>Hi all, I'm trying to write a multiplatform function that tries to
>>return the actual user home directory.
>>...
> 
> What's wrong with:
>     from user import home
> which does about what your code does.

:-)

I suspect he simply didn't know about it.  I didn't either...

Nemesis, please use the above recipe instead, as it makes
the more reasonable (IMHO) choice of checking for a HOME
environment variable before trying the expanduser("~")
approach.  This covers folks like me who, though stuck
using Windows, despise the ridiculous Microsoft convention
of "user folders" named like "C:\Documents and Settings\Peter"
and prefer to create sensible folder like c:\users\peter
and set a HOME variable to point to it.  Your approach
ignores our HOME variable.

c:\>python
Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on win32
 >>> from user import home
 >>> print home
c:\users\peter

Yay! :-)

-Peter


From claird at lairds.us  Wed Feb 16 15:19:32 2005
From: claird at lairds.us (Cameron Laird)
Date: Wed, 16 Feb 2005 20:19:32 GMT
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
Message-ID: <mrobe2-uqh.ln1@lairds.us>

In article <7xll9pus7o.fsf_-_ at ruckus.brouhaha.com>,
Paul Rubin  <http://phr.cx at NOSPAM.invalid> wrote:
>I've started a few threads before on object persistence in medium to
>high end server apps.  This one is about low end apps, for example, a
>simple cgi on a personal web site that might get a dozen hits a day.
>The idea is you just want to keep a few pieces of data around that the
>cgi can update.
>
>Immediately, typical strategies like using a MySQL database become too
>big a pain.  Any kind of compiled and installed 3rd party module (e.g.
>Metakit) is also too big a pain.  But there still has to be some kind
>of concurrency strategy, even if it's something like crude file
>locking, or else two people running the cgi simultaneously can wipe
>out the data store.  But you don't want crashing the app to leave a
>lock around if you can help it.
>
>Anyway, something like dbm or shelve coupled with flock-style file
>locking and a version of dbmopen that automatically retries after 1
>second if the file is locked would do the job nicely, plus there could
>be a cleanup mechanism for detecting stale locks.
>
>Is there a standard approach to something like that, or should I just
>code it the obvious way?
>
>Thanks.

I have a couple of oblique, barely-helpful reactions; I
wish I knew better solutions.

First:  I'm using Metakit and SQLite; they give me more
confidence and fewer surprises than dbm.

Second:  Locking indeed is a problem, and I haven't 
found a good global solution for it yet.  I end up with
local fixes, that is, rather project-specific locking
schemes that exploit knowledge that, for example, there
are no symbolic links to worry about, or NFS mounts, or
...

Good luck.


From rkern at ucsd.edu  Tue Feb 15 00:35:24 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 14 Feb 2005 21:35:24 -0800
Subject: Commerical graphing packages?
In-Reply-To: <mailman.2572.1108415688.22381.python-list@python.org>
References: <420d1595$1@nntp.zianet.com>
	<cupsik$an7$1@ctb-nnrp2.saix.net>	<200502142143.58961.francis.girard@free.fr>
	<mailman.2572.1108415688.22381.python-list@python.org>
Message-ID: <cus1mt$lf$1@news1.ucsd.edu>

John Hunter wrote:

> Although it is a free and open source package, I think that the image
> quality and support is on par with if not superior to what you find in
> many commercial solutions.

Amen to that. The ChartDirector demos looked very ugly to my eye. 
matplotlib plots usually look quite good without any tweaking.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From steven.bethard at gmail.com  Thu Feb 24 09:14:31 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 24 Feb 2005 07:14:31 -0700
Subject: Compile time evaluation (aka eliminating default argument hacks)
In-Reply-To: <mailman.2997.1109243714.22381.python-list@python.org>
References: <mailman.2997.1109243714.22381.python-list@python.org>
Message-ID: <ceGdnSLOHIvbfIDfRVn-jg@comcast.com>

Nick Coghlan wrote:
> Time for another random syntax idea. . .
> 
> So, I was tinkering in the interactive interpreter, and came up with the 
> following one-size-fits-most default argument hack:
>
[snip]
> 
> But consider a syntax like the following:
> 
>     def f():
>         use x, y from:
>             y = x + 1  # [1]
>         print x, y
>
[snip]
> 
> Essentially, the function is compiled as usual, and emits code at the 
> location of the 'use' statement equivalent to that for "x, y = <const>". 
> The relevant entry in co_consts is populated by executing the body of 
> the 'use' statement with an implicit "return x, y" at the end. The 
> environment for that execution is the same as that for any function 
> defined at the same level as the containing scope of the 'use' statement 
> (e.g. module level in the example).

So just to clarify, the issue you're trying to address is when you want 
early binding like function default arguments get, but you don't want to 
declare the names as function arguments?

If I understand you right, I like the idea, though I'm undecided on your 
syntax for it at the moment...

STeVe


From theller at python.net  Fri Feb 18 15:18:17 2005
From: theller at python.net (Thomas Heller)
Date: Fri, 18 Feb 2005 21:18:17 +0100
Subject: unicode encoding usablilty problem
References: <opsmekm2ei6yt6e7@news.cisco.com>
	<mailman.2811.1108751132.22381.python-list@python.org>
	<opsmepfmcx6yt6e7@news.cisco.com>
	<mailman.2813.1108754311.22381.python-list@python.org>
Message-ID: <is4pzkom.fsf@python.net>

=?ISO-8859-15?Q?Walter_D=F6rwald?= <walter at livinglogic.de> writes:

> aurora wrote:
>
>  > [...]
>> In Java they are distinct data type and the compiler would catch all
>> incorrect usage. In Python, the interpreter seems to 'help' us to
>> promote  binary string to unicode. Things works fine, unit tests
>> pass, all until  the first non-ASCII characters come in and then the
>> program breaks.
>> Is there a scheme for Python developer to use so that they are safe
>> from  incorrect mixing?
>
> Put the following:
>
> import sys
> sys.setdefaultencoding("undefined")
>
> in a file named sitecustomize.py somewhere in your Python path and
> Python will complain whenever there's an implicit conversion between
> str and unicode.

Sounds cool, so I did it.
And started a program I was currently working on.
The first function in it is this:

if sys.platform == "win32":

    def _locate_gccxml():
        import _winreg
        for subkey in (r"Software\gccxml", r"Software\Kitware\GCC_XML"):
            for root in (_winreg.HKEY_CURRENT_USER, _winreg.HKEY_LOCAL_MACHINE):
                try:
                    hkey = _winreg.OpenKey(root, subkey, 0, _winreg.KEY_READ)
                except WindowsError, detail:
                    if detail.errno != 2:
                        raise
                else:
                    return _winreg.QueryValueEx(hkey, "loc")[0] + r"\bin"

    loc = _locate_gccxml()
    if loc:
        os.environ["PATH"] = loc

All strings in that snippet are text strings, so the first approach was
to convert them to unicode literals.  Doesn't work.  Here is the final,
working version (changes are marked):

if sys.platform == "win32":

    def _locate_gccxml():
        import _winreg
        for subkey in (r"Software\gccxml", r"Software\Kitware\GCC_XML"):
            for root in (_winreg.HKEY_CURRENT_USER, _winreg.HKEY_LOCAL_MACHINE):
                try:
                    hkey = _winreg.OpenKey(root, subkey, 0, _winreg.KEY_READ)
                except WindowsError, detail:
                    if detail.errno != 2:
                        raise
                else:
                    return _winreg.QueryValueEx(hkey, "loc")[0] + ur"\bin"
#-----------------------------------------------------------------^
    loc = _locate_gccxml()
    if loc:
        os.environ["PATH"] = loc.encode("mbcs")
#--------------------------------^

So, it appears that:

- the _winreg.QueryValue function is strange: it takes ascii strings,
  but returns a unicode string.
- _winreg.OpenKey takes ascii strings
- the os.environ["PATH"] accepts an ascii string.

And I won't guess what happens when there are registry entries with
unlauts (ok, they could be handled by 'mbcs' encoding), and with chinese
or japanese characters (no way to represent them in ascii strings with a
western locale and mbcs encoding, afaik).


I suggest that 'sys.setdefaultencoding("undefined")' be the standard
setting for the core developers ;-)

Thomas


From ola.natvig at infosense.no  Tue Feb  1 08:28:56 2005
From: ola.natvig at infosense.no (Ola Natvig)
Date: Tue, 01 Feb 2005 14:28:56 +0100
Subject: equivelant of Java's toString() method? (not repr)
In-Reply-To: <WeLLd.29107$B5.4126@fe1.news.blueyonder.co.uk>
References: <WeLLd.29107$B5.4126@fe1.news.blueyonder.co.uk>
Message-ID: <opc4d2-9eu.ln1@pluto.i.infosense.no>

Alex Hunsley wrote:
> Pretty simple seeming question, but can't find answer via google or docs...
> 
> I am using urllib2 as follows:
> 
>  handle = urlopen(req, postdata)         # and URL to return a handle on
>  ...
>  print handle.info()
> 
> the print statement prints out the headers:
> 
> Content-Type: text/html;charset=ISO-8859-1
> Content-Length: 2845
> Date: Tue, 01 Feb 2005 12:40:28 GMT
> Server: Apache Coyote/1.0
> Connection: close
> 
> which is the string I want to use.
> However, if I write a function call using this:
> 
>   log(handle.info())
> 
> I get this:
> 
>  TypeError: cannot concatenate 'str' and 'instance' objects
> 
> (The log function expects a string)
> What is the magic incantation to get the string I want so I can pass it 
> to my function?
> I've tried repr() but that isn't it (I suspected it wouldn't be).
> I suppose I'm looking for the equivelant of Java's toString() method...
> 
> thanks!
> alex
> 
> 
> 
> 

use:

log(str(handle.info()))

str creates a string object from a supplied object with a __str__ 
method. I think print calls str on what it is going to print



-- 
--------------------------------------
  Ola Natvig <ola.natvig at infosense.no>
  infoSense AS / development


From benjamin.cordes at blawrc.de  Mon Feb 14 11:35:36 2005
From: benjamin.cordes at blawrc.de (naturalborncyborg)
Date: 14 Feb 2005 08:35:36 -0800
Subject: nested lists as arrays
Message-ID: <b35e3308.0502140835.53d3d9b2@posting.google.com>

Hi, I'm using nested lists as arrays and having some problems with
that approach. In my puzzle class there is a swapelement method which
doesn't work out. Any help and comments on the code will be
appreciated. Thanks.

# Puzzle.py
# class for a sliding block puzzle

# an starting state of a 8-puzzle could look like the following:
# where X is an empty space and the move up in the example would move
6 to X
# X is represented as -1 in the array
# ------------
# | 7  2  4  |
# |          |
# | 5  X  6  |
# |          |
# | 8  3  1  |
# ------------

# the goal is to reach this state:
# ------------
# | X  1  2  |
# |          |
# | 3  4  5  |
# |          |
# | 6  7  8  |
# ------------

import copy

class Puzzle:
    
    def __init__(self, dim):
       self.dim = dim
       self.elements = [[0 for column in range(dim)] for row in
range(dim) ]
 
    def getEmptySlot(self):
        i = 0
        j = 0
        while i  <= self.dim-1:
            while j  <= self.dim-1:
                if self.elements[j][i] == -1:
                    return [j, i]
                j = j+1
            j = 0
            i = i + 1
            
    def performMove(self, direction):
        slot = self.getEmptySlot()

        if (direction == "up"):
            self.swapElements(slot[1], slot[0], slot[1]+1, slot[0])
        elif (direction == "down"):
            self.swapElements(slot[1], slot[0], slot[1]-1, slot[0])
        elif direction == "left":
            self.swapElements(slot[1], slot[0], slot[1], slot[0]-1)
        elif (direction == "right"):
            self.swapElements(slot[1], slot[0], slot[1], slot[0]+1)
            
    def swapElements(self, fromx, fromy, tox, toy):         
        dummy = self.elements[toy][tox]

        self.elements[toy][tox] = self.elements[fromy][fromx]
        self.elements[fromy][fromx] = dummy
            
    def getPossibleMoves(self):    
        emptySlot = self.getEmptySlot()           
        y = emptySlot[1]
        x = emptySlot[0]
        north = (y == 0)
        south = (y == (self.dim-1))
        west = (x == 0)
        east = (x == (self.dim-1))
        
        middle = not(north or south or west or east)
        
        northwest = north and west
        northeast = north and east
        southwest = south and west
        southeast = south and east
        # orientation has to be distinct
        # save original values
        orignorth = north
        origsouth = south
        # original north or south
        orignors = north or south

        north = north and not (west or east)
        south = south and not (west or east)
        west = west and not (orignors)
        east = east and not (orignors)                
        
        if middle:
            return ["up", "down", "left", "right"]
        elif north:
            return ["up", "left", "right"]
        elif south:
            return ["down", "left", "right"]
        elif west:
            return ["up", "down", "left"]
        elif east:            
            return ["up", "down", "right"]
        elif northwest:
            return ["up", "left"]
        elif northeast:
            return ["up", "right"]
        elif southwest:
            return ["down", "left"]
        elif southeast:
            return ["down", "right"]
               
# ~Puzzle.py


From roccomoretti at hotpop.com  Sat Feb 19 23:51:44 2005
From: roccomoretti at hotpop.com (Rocco Moretti)
Date: Sat, 19 Feb 2005 22:51:44 -0600
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <1119loiqgsn4392@corp.supernews.com>
References: <37hippF4gcimiU1@individual.net><qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com><37hqlrF59l2b2U1@individual.net><873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>	<421450CC.9080504@swiftdsl.com.au>
	<mailman.2744.1108629122.22381.python-list@python.org>
	<4214A543.2000006@swiftdsl.com.au>
	<1119loiqgsn4392@corp.supernews.com>
Message-ID: <cv950s$45r$1@news.doit.wisc.edu>

Jeff Shannon wrote:
> news.sydney.pipenetworks.com wrote:
> 
>> Fredrik Lundh wrote:
>>
>>> a certain "princess bride" quote would fit here, I think.
>>
>> I'm not really familiar with it, can you enlighten please.
> 
> (Taking a guess at which quote /F had in mind...)
> 
> Vezzini:  "Inconceivable!"
> Inigo:    "You keep using that word.  I do not think that it means what 
> you think it means."
> 
> Jeff Shannon

With all the talk about "never"s, my initial thought was:

Vezzini: Haha.. you fool! You fell victim to one of the classic 
blunders. The most famous is: Never get involved in a land war in Asia. 
Only slightly less well know is this: Never go in against a Sicilian 
when death is on the line! Ha ha, Ha ha, Ha <thunk>

I think yours makes more sense in context, though.


From fortepianissimo at gmail.com  Thu Feb  3 01:08:18 2005
From: fortepianissimo at gmail.com (fortepianissimo)
Date: 2 Feb 2005 22:08:18 -0800
Subject: Computing class variable on demand?
Message-ID: <1107410898.260491.203090@l41g2000cwc.googlegroups.com>

We all know that using __getattr__() we can compute an instance
variable on demand, for example:

class Foo:
def __getattr__ (self, name):
if name == 'bar':
self.bar = 'apple'
return self.bar
else:
raise AttributeError()

Then we can

f = Foo()
s1 = f.bar
s2 = f.bar   # this uses the "cached" result

My question is can we do the same with class variables? I can't find a
class-equivalent __getattr__ for this purpose. The key is to allow the
use of the following statement

Foo.bar   # bar is a class variable of Foo computed on demand
without unnecessary fudge. Thanks.



From tdelaney at avaya.com  Thu Feb 10 18:13:46 2005
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Fri, 11 Feb 2005 10:13:46 +1100
Subject: [N00B] What's %?
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE72123F@au3010avexu1.global.avaya.com>

Harlin wrote:

> In the mode of anticipating another question... I get these all the
> time at work of all places! You'd think IT workers would know the
> answer to these...
> 
> What good is the modulus operator? What would I ever need it for?

# Print a summary every 100 rows
for i in range(1, 1001):
    if i % 100 == 0:
        print 'Summary: %s rows' % (i,)

There are two examples of using the modulo operator in the above - one
is using it in it's intended integer form, and the other is using it in
its overloaded string formatting form.

Note that the range is from 1 (inclusive) to 1001 (exclusive). If you
used the normal range(1000) you would get a summary on the first time
round the loop, and wouldn't get one for the last 99. Why is for you to
work out ;)

Tim Delaney


From apardon at forel.vub.ac.be  Tue Feb  8 03:01:25 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 8 Feb 2005 08:01:25 GMT
Subject: Confused with methods
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>
	<slrnd0enor.26q.apardon@rcpc42.vub.ac.be>
	<1grmd4z.1tlm4e61650vedN%aleaxit@yahoo.com>
	<slrnd0f07t.26q.apardon@rcpc42.vub.ac.be>
	<1grmg8s.17t7tj4180jdj6N%aleaxit@yahoo.com>
Message-ID: <slrnd0gsel.26q.apardon@rcpc42.vub.ac.be>

Op 2005-02-07, Alex Martelli schreef <aleaxit at yahoo.com>:
> Antoon Pardon <apardon at forel.vub.ac.be> wrote:
>
>> Yes it is inconsistent with the rest of python. That you found
>> a subset in which it is consistent doesn't change that.
>> 
>> And what if you do:
>> 
>>   c = C()
>>   c.f = g
>> 
>> 
>> The fact that a function in a class performs a lot of magic if
>> it is called through an instance, that isn't performed otherwise,
>> makes python inconsistent here. You may like the arrangement
>> (and it isn't such a big deal IMO) but that doesn't make it consistent.
>
> Any descriptor (be it a function or otherwise) has its __get__ method
> called, when _accessed_ by attribute syntax, if and only if that
> descriptor is in a class.  _ALL_ of Python is perfectly consistent on
> this point, and if I didn't already know the kind of crazy and obviously
> false assertions that you post *QUITE* consistently, I would be
> astonished to see you claim otherwise.  Knowing your posts, this latest
> idiocy is perfectly "par for the course".

No python is not consistent and your continuous repetion doesn't
make it so. To illustrate, here the following code:

class A:
  l = []
  def f(): pass

a = A()
print a.l is A.l
print a.f is A.f

which produces:

True
False


>
> "A lot of magic" is simply a stupid and imprecise way to describe "the
> __get__ method gets called".

So what? That is an implementation detail. 

> Saying that any of this happens when the
> function is CALLED is a definitely more serious mistake, since it's
> absolutely obvious that the __get__ method is called when the function
> (or any other attribute) is *ACCESSED* -- the call operation (on
> whatever object __get__ returns) happens AFTERWARDS.

Fine, I was imprecise. But your harping on my impression doesn't
change the fact that python doesn't work consistent here.

> Why you, and a few other habitual trolls, keep lowering the signal to
> noise ratio of this newsgroup with your blatherings, I don't know;

Well you can think me a troll, I think you are a zealot who gets
overly defensive if the "wrong" people try to suggest python has
some failing.

> I'm
> sure this behavior must be giving you guys some kind of satisfaction.
> Whether the damage you do to the clarity of the issues, and to the
> understanding of newbies who are unfortunate enough to read and trust
> the many imprecise and/or utterly false assertions you keep making,

Look we are all people, we all are imprecise at moments, including you.
But when the "wrong" people get imprecise you get into a fit on how
these people are trolls and try to get python into a bad daylight
instead of trying to understand what they really are trying to say
and reacting to that and maybe in the mean time correcting the
imprecession.

In this case the way python accesses class functions from an instance
is not consistent with how python accesses other class attributes
from an instance. I know it is designed that way and I can understand
hwy it was done. But this inconsistency can be a stumbling block for
a newcomer and I think that explaining why the inconsistency is present
is a better option than declaring there is no inconsistency.

> with
> totally unjustified airs of competence, is part of your jollies, or just
> a side effect you don't care a whit about, I don't know either.  Guess
> I'll just killfile you for another month now -- wish MacSOUP had a
> simple way to to permanent killfiling, since it's pretty obvious by now
> that it's quite unlikely you'll even post anything worthwhile at all.

Well whether I post something that is worthwhile to you, can only be
decided by you. I sometimes have my doubts about you too.

-- 
Antoon Pardon


From kent37 at tds.net  Mon Feb 14 15:39:37 2005
From: kent37 at tds.net (Kent Johnson)
Date: Mon, 14 Feb 2005 15:39:37 -0500
Subject: Can't subclass datetime.datetime?
In-Reply-To: <421100b4$0$41671$a1866201@visi.com>
References: <421100b4$0$41671$a1866201@visi.com>
Message-ID: <42110996$1_1@newspeer2.tds.net>

Grant Edwards wrote:
> Is it true that a datetime object can convert itself into a
> string, but not the other way around?  IOW, there's no simple
> way to take the output from str(d) and turn it back into d?

According to this thread, a patch has been checked in that adds strptime() to datetime. So there is 
something to look forward to...
http://tinyurl.com/4fbkb

Kent


From rkern at ucsd.edu  Wed Feb  2 23:34:50 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Wed, 02 Feb 2005 20:34:50 -0800
Subject: Atlas and NumPy Problems
In-Reply-To: <ctp8ss$mls$1@news1.ucsd.edu>
References: <mailman.1715.1107298278.22381.python-list@python.org>
	<ctp8ss$mls$1@news1.ucsd.edu>
Message-ID: <cts9la$p53$1@news1.ucsd.edu>

Robert Kern wrote:
> Justin Lemkul wrote:
> 
>> Hello all,
>>
>> I am hoping someone out there will be able to help me.  I am trying to 
>> install a program that utilizes NumPy.  In installing NumPy, I 
>> realized that I was lacking Atlas.  I ran into the following problems 
>> installing Atlas and NumPy, as I realized that NumPy could be 
>> installed using the Mac OSX veclib already built in.  If anyone has 
>> any ideas on how to fix either of these, I would be most grateful.
>>
>> I am fairly new to Python (I've been learning it myself), so I 
>> apologize if these questions are a bit foolish.  I've been fighting 
>> these problems for days, and I'm out of ideas.
>>
>> I am running OS X v10.3, gcc v3.3, Python v2.3, ScientificPython 
>> v2.4.3, and am attempting to install NumPy 23.7
> 
> 
> Did you try to follow my advice from the other thread? What does your 
> setup.py look like?

For the record, he did in fact follow my advice (removing the 
ATLAS-specific defaults and letting setup.py autodetect the vecLib 
framework), and it turns out my advice was incomplete.

One also needs to add

   extra_link_args=extra_link_args,

to the argument list of the Extension() call for the _dotblas module.

It worked fine on my machine because I had modified my Python config to 
use "-undefined dynamic_lookup" instead of explicit -framework arguments 
(this change is necessary for the neighborly cohabitation of different 
Python versions, I believe. See the PythonMac-SIG archives for more 
information).

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From sparda713 at hotmail.com  Wed Feb 23 17:09:32 2005
From: sparda713 at hotmail.com (sparda713 at hotmail.com)
Date: 23 Feb 2005 14:09:32 -0800
Subject: msnp group chats
Message-ID: <1109196572.552653.189620@l41g2000cwc.googlegroups.com>

I'm currently using the msnp.py module in a project.  We are trying to
implement a group chats feature.  Has anyone had any success in doing
this or know how to do this?  We have it doing single chats, but we
can't figure out how MSN is adding the multiple invites.  Any help
would be greatly appreciated!



From snacktime at gmail.com  Tue Feb  8 00:33:52 2005
From: snacktime at gmail.com (snacktime)
Date: Mon, 7 Feb 2005 21:33:52 -0800
Subject: Problems with python and threads under Freebsd
In-Reply-To: <1f060c4c05020720136cf5b3f@mail.gmail.com>
References: <mailman.2101.1107803855.22381.python-list@python.org>
	<cu8p1f$g9n$1@online.de> <1f060c4c05020720136cf5b3f@mail.gmail.com>
Message-ID: <1f060c4c05020721333542e5ee@mail.gmail.com>

After debugging this some more I narrowed it down to an encryption
function in pycrypto that is triggering the segfault.  I posted a bug
report.  Don't really know enough about threading to know whether it's
a python bug or a pycrypto bug, but I'll let someone else sort that
out now..

Chris


From mefjr75 at hotmail.com  Mon Feb  7 22:28:56 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 7 Feb 2005 19:28:56 -0800
Subject: Memory Allocation?
References: <8GCNd.9880$ya6.9761@trndny01>
	<1107758745.493713.190530@z14g2000cwz.googlegroups.com>
	<zzTNd.16814$s16.3620@trndny02>
Message-ID: <1107833336.626176.175720@l41g2000cwc.googlegroups.com>

Chris S. wrote:
>Using similar logic, we shouldn't need access to the Garbage Collector
>or Profiler. After all, why would anyone need to know how fast their
>program is running or whether or not their garbage has been collected.
>Python takes care of it.
Exactly! Even though there are a few who just won't listen ;)
I answered earlier that the *way* CPython allocates and uses memory it
was kinda useless. Similar objects  in CPython and Jython and .etc..
have different implementions and consequently have different memory
footprints. Do you just want to keep track of average memory? Or do you
want know exactly when an object is collected and the memory is freed?
 If so, that is also one of those grey areas of Python, objects are
collected and memory is freed at differing times , depending on several
factors plus the phase of the moon.
Lots of devils and plenty of details. If I am wrong someone correct me
;)
If you search around you can find many pointers to memory effecient
coding style in Python( never add a string together, use a list and
append then join, etc.)
Stick to profiling it will serve you better. But do not let me stop you
from writing  a  memory profiler ;)
M.E.Farmer



From pierre.barbier at cirad.fr  Wed Feb  2 08:50:37 2005
From: pierre.barbier at cirad.fr (Pierre Barbier de Reuille)
Date: Wed, 02 Feb 2005 14:50:37 +0100
Subject: type of simple object
In-Reply-To: <DY3Md.102584$Jk5.85065@lakeread01>
References: <1107255752.258025.50870@z14g2000cwz.googlegroups.com>
	<1107257264.146280.89560@c13g2000cwb.googlegroups.com>
	<1107258136.815344.145380@c13g2000cwb.googlegroups.com>
	<tyfy8e8lcef.fsf@pcepsft001.cern.ch>
	<1107261198.943087.80960@z14g2000cwz.googlegroups.com>
	<42008044$0$14171$626a14ce@news.free.fr>
	<DY3Md.102584$Jk5.85065@lakeread01>
Message-ID: <4200da2b$0$21736$626a14ce@news.free.fr>

Steve Holden a ?crit :
> Pierre Barbier de Reuille wrote:
> 
>> ajikoe at gmail.com a ?crit :
>>
>>> Thank you guys.
>>>
>>> My function should multiply every element  of a list, for example
>>> "something"
>>> and "something" can be an integer or another list.
>>> If it deals with integer than it is ok, but
>>> If it deals with list than it become false for example list*2 =
>>> listlist, and what I really want is to mutlitply its member.
>>> That's why I need to know the type of my data in "something".
>>
>>
>>
>> As stated by another comment, I would do something like :
>>
>> def multiply(object, factor):
>>   try:
>>     return [ multiply(i,factor) for i in object ]
>>   except TypeError:
>>     return object*factor
>>
>> This function will, recursively multiply a nested list of numbers by 
>> "factor" ...
>>
> As a matter of good practice it's usually considered unwise to shadow 
> names of system types like "dict" and "object", though there wouldn't be 
> any problems in this case except the infinite recursion. Which 
> definitely *would* be a problem.

Oops ... indeed, I usually try not to do so ^_^
That's why I usually use "obj" more than "object" and that most of the 
time I use a name more _on the topic_ ...

Thx for the correction :)

Pierre

> 
> regards
>  Steve


From firstname.lastname at iki.fi-spam  Wed Feb  2 17:18:27 2005
From: firstname.lastname at iki.fi-spam (Simo Melenius)
Date: 03 Feb 2005 00:18:27 +0200
Subject: set, dict and other structures
References: <1107214762.198058.55680@f14g2000cwb.googlegroups.com>
	<JgALd.1731$sR5.1418@trndny05>
	<XmBLd.10042$lB4.283875@twister1.libero.it>
Message-ID: <87pszi38ss.fsf@sme.intra.citec.fi>

"Giovanni Bajo" <noway at sorry.com> writes:

> Just today I was writing some code where I wanted to use sets for
> the abstraction (intersection, etc.), but also carry some values
> with them to process. So, yes, I believe that having set-like
> abstraction for dictionaries would be great. In fact, for a moment I
> wondered if dict.keys() was already of type set in 2.4, because it
> could have made sense.

Which sets you need depends on each case, so a generic set-ified
extension would be both limited and potentially confusing. For
example, a set of (key,value) tuples is the simplest and unambiguous.
On the other hand, if the values differ you really just need a set of
keys and then you can do the value lookup and collision handling
yourself using the result set as keys to both of your dictionaries.
You could subclass dict to provide aliases such as:

dict.itemset ()
dict.keyset ()
dict.valueset ()

for the following if these look overly bloated to you:

set (dict.iteritems ())
set (dict.iterkeys ())
set (dict.itervalues ())

For example:

py> for k,v in set (d1.iteritems ()) - set (d2.iteritems ()):
py>   print k, v

looks quite concise and self-explanatory to me already. A _notable_
performance gain would probably justify native set-ifying getters,
especially if there indeed were implementation-level data structures
to share.


br,
S


From haynesc at gmail.com  Mon Feb 28 14:28:26 2005
From: haynesc at gmail.com (haynesc at gmail.com)
Date: 28 Feb 2005 11:28:26 -0800
Subject: cannot open file in write mode, no such file or directory
Message-ID: <1109618906.347448.218700@o13g2000cwo.googlegroups.com>

Hi,

I'm having a problem where when trying to open a file in write mode, I
get an IOError stating no such file or directory.  I'm calling an
external program which takes an input file and produces an output file
repeatedly, simulating the input file separately for each replicate.
The error occurs when trying to open the input file to write out the
new data.  The problem is difficult to reproduce since it only shows up
once every few thousand replicates.  I've tried using both os.system
and os.popen to invoke the external program.  Originally I was running
this on cygwin, but also tried under windows.

I'm confused as to why the error would state no such file when opening
in write mode, it should just create the file if it can't find it.  I
imagine it has something to do with the external program (its mostly
likely not written very well), but I'm hoping theres a solution to this
that doesn't involve modifying that program.  Is it possible that the
file isn't being closed properly?  If so, how can I ensure it is
available?

Thanks



From evan at tokenexchange.com  Thu Feb 24 17:44:50 2005
From: evan at tokenexchange.com (Evan Simpson)
Date: Thu, 24 Feb 2005 16:44:50 -0600
Subject: Python and "Ajax technology collaboration"
In-Reply-To: <1109193970.029421.213490@l41g2000cwc.googlegroups.com>
References: <1109193970.029421.213490@l41g2000cwc.googlegroups.com>
Message-ID: <421E58E2.6070408@tokenexchange.com>

John Willems wrote:
> Interesting GUI developments, it seems. Anyone developed a "Ajax"
> application using Python? Very curious....

Not what you meant, perhaps, but http://weboggle.shackworks.com has a 
Javascript/HTML/CSS one-page client that uses XMLHttpRequest to talk to 
a Python back-end.  The requests are very crude, though, and the server 
is utterly specialized (no framework, not even asyncore).

Cheers,

Evan @ 4-am



From kristian.zoerhoff at gmail.com  Wed Feb  9 22:44:53 2005
From: kristian.zoerhoff at gmail.com (Kristian M Zoerhoff)
Date: Thu, 10 Feb 2005 03:44:53 +0000 (UTC)
Subject: Help: retrieving e-mail from yahoo pop server. what's wrong?
References: <q6idnUufKYXN8pffRVn-pA@rcn.net>
Message-ID: <slrnd0lm3q.69r.zoerhoff@ukato.freeshell.org>

In article <q6idnUufKYXN8pffRVn-pA at rcn.net>, Andre wrote:
> 
> import getpass, poplib, re
> POPHOST = "pop.mail.yahoo.com"
> POPUSER = "mylogin"
> POPPASS = "mypass"
> pop = poplib.POP3(POPHOST)
> pop.user(POPUSER)
> 
> 
> up to this point evertything proceeds fine, but when i do
> 
> 
> if not POPPASS:> 
> POPPASS = getpass.getpass("Password for %s@%s:" % (POPUSER, POPHOST))
> pop.pass_(POPPASS)

Wait a tic. The 'if not POPPASS' should only work if POPPASS is set to '',
not if it's set to 'mypass'. Are you really being prompted for your 
password in this case? If you really are being prompted, then either you
don't have a valid POP3 account at Yahoo (you have to pay or be using
SBC Yahoo DSL to have it), or you haven't enabled it (you have to do this
in your Yahoo mail options).

Make double sure you can access POP3 mail via another client like Outlook
or Thunderbird as well, to ensure that POP3 works at all. If you can't get
it to work in those clients, you won't get it to work in Python, either.

-- 
zoerhoff(AT)sdf.lonestar.org 
kristian.zoerhoff(AT)gmail.com


From ajikoe at gmail.com  Tue Feb  1 06:42:16 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 1 Feb 2005 03:42:16 -0800
Subject: type of simple object
In-Reply-To: <1107257264.146280.89560@c13g2000cwb.googlegroups.com>
References: <1107255752.258025.50870@z14g2000cwz.googlegroups.com>
	<1107257264.146280.89560@c13g2000cwb.googlegroups.com>
Message-ID: <1107258136.815344.145380@c13g2000cwb.googlegroups.com>

The result <type 'str'>
How can I check it since it is not a string right?

Pujo



From leo at lspace.org  Wed Feb 16 13:47:21 2005
From: leo at lspace.org (Leo Breebaart)
Date: 16 Feb 2005 18:47:21 GMT
Subject: Why doesn't join() call str() on its arguments?
Message-ID: <37hippF4gcimiU1@individual.net>

I've tried Googling for this, but practically all discussions on
str.join() focus on the yuck-ugly-shouldn't-it-be-a-list-method?
issue, which is not my problem/question at all.

What I can't find an explanation for is why str.join() doesn't
automatically call str() on its arguments, so that e.g.
str.join([1,2,4,5]) would yield "1245", and ditto for e.g.
user-defined classes that have a __str__() defined.

All I've been able to find is a 1999 python-dev post by Tim
Peters which would seem to indicate he doesn't understand it
either:

    "string.join(seq) doesn't currently convert seq elements to
     string type, and in my vision it would. At least three of us
     admit to mapping str across seq anyway before calling
     string.join, and I think it would be a nice convenience
     [...]"

But now it's 2005, and both string.join() and str.join() still
explicitly expect a sequence of strings rather than a sequence of
stringifiable objects.

I'm not complaining as such -- sep.join(str(i) for i in seq) is
not *that* ugly, but what annoys me is that I don't understand
*why* this was never changed. Presumably there is some
counter-argument involved, some reason why people preferred the
existing semantics after all. But for the life of me I can't
think what that counter-argument might be...

-- 
Leo Breebaart  <leo at lspace.org>


From dave.opstad at monotypeimaging.com  Tue Feb  1 10:28:17 2005
From: dave.opstad at monotypeimaging.com (Dave Opstad)
Date: Tue, 01 Feb 2005 07:28:17 -0800
Subject: Awkwardness of C API for making tuples
Message-ID: <dave.opstad-E4D4C4.07281701022005@reader0900.news.uu.net>

One of the functions in a C extension I'm writing needs to return a 
tuple of integers, where the length of the tuple is only known at 
runtime. I'm currently doing a loop calling PyInt_FromLong to make the 
integers, then PyTuple_New, and finally a loop calling PyTuple_SET_ITEM 
to set the tuple's items. Whew.

Does anyone know of a simpler way? I can't use Py_BuildValue because I 
don't know at compile-time how many values there are going to be. And 
there doesn't seem to be a PyTuple_FromArray() function.

If I'm overlooking something obvious, please clue me in!

Thanks,
Dave Opstad


From gsakkis at rutgers.edu  Wed Feb 23 11:51:28 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: Wed, 23 Feb 2005 11:51:28 -0500
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cvaoft$av6$1@usenet.otenet.gr>
	<874qg6937w.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<cvcv9b$nbm$1@usenet.otenet.gr> <37uk2kF5gv38bU1@individual.net>
	<nmSSd.25321$Am3.782245@news20.bellglobal.com>
	<cvi2c5$ibu$1@usenet.otenet.gr>
	<421c91c8$0$44647$a1866201@visi.com>
	<cvi5s1$4l5$1@usenet.otenet.gr>
Message-ID: <383qkkF5k6rf4U1@individual.net>

"Ilias Lazaridis" <ilias at lazaridis.com> wrote in message news:cvi5s1$4l5$1 at usenet.otenet.gr...
> Grant Edwards wrote:
> [...]
> > Um, you realize that nobody in this thread takes you the least
> > bit seriously and people are just poking you with a stick to
> > watch you jump?
>
> jump:
>
> [EVALUATION] - E02 - Support for MinGW Open Source Compiler
> Essence:
> http://groups-beta.google.com/group/comp.lang.python/msg/5ba2a0ba55d4c102


Lol, this guy is hopeless :-)

George




From luke at tatooine.planet  Mon Feb  7 14:42:38 2005
From: luke at tatooine.planet (Luke Skywalker)
Date: Mon, 07 Feb 2005 20:42:38 +0100
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com><mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
Message-ID: <ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>

On Mon, 7 Feb 2005 19:41:11 +0100, "Fredrik Lundh"
<fredrik at pythonware.com> wrote:
>> Am I totally off-target?
>
>yes.  for details, see the "Combining work with code released under the
>GPL" section on this page:

Mmmm.. The FAQ isn't very clear about whether it's allowed to write a
proprietary EXE that calls a GPLed DLL:

"However, in many cases you can distribute the GPL-covered software
alongside your proprietary system. To do this validly, you must make
sure that the free and non-free programs communicate at arms length,
that they are not combined in a way that would make them effectively a
single program. The difference between this and "incorporating" the
GPL-covered software is partly a matter of substance and partly form.
The substantive part is this: if the two programs are combined so that
they become effectively two parts of one program, then you can't treat
them as two separate programs. So the GPL has to cover the whole
thing."

Considering the fact that the Qt DLL exist by themselves, that the
version used is the one provided by Qt, and that the EXE uses a
standard, open way to communicate with it, the above does seem to say
this use would be valid. Anybody knows of a similar case and the
output?

Luke.



From skip at pobox.com  Thu Feb  3 17:32:50 2005
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 3 Feb 2005 16:32:50 -0600
Subject: python-mode tab completion problem
In-Reply-To: <1107467959.821309.102850@z14g2000cwz.googlegroups.com>
References: <1107467959.821309.102850@z14g2000cwz.googlegroups.com>
Message-ID: <16898.42642.530502.108487@montanaro.dyndns.org>


    test1dellboy3> I am exploring python-mode on emacs. When I open foo.py
    test1dellboy3> in emacs and hit C-!, it starts the python interpreter in
    test1dellboy3> another window. Next, I execute -

    ...

That's not really intended to be used as an interactive session with all
sorts of bells and whistles.  If you want a true terminal emulator within
Emacs, try

    M-x terminal-emulator RET

You can do tab completion and command recall just like a normal terminal.
(In fact, you can run Emacs within Emacs using terminal-emulator.)

Skip


From roy at panix.com  Fri Feb 25 11:09:14 2005
From: roy at panix.com (Roy Smith)
Date: 25 Feb 2005 11:09:14 -0500
Subject: Is there way to determine which class a method is bound to?
References: <a8bfd74c05022506466cd6d3fc@mail.gmail.com>
	<vueu115tqf6dbbakaedt2148vjj3hc84j5@4ax.com>
	<mailman.3055.1109344955.22381.python-list@python.org>
Message-ID: <cvnija$oq8$1@panix2.panix.com>

In article <mailman.3055.1109344955.22381.python-list at python.org>,
Victor Ng  <crankycoder at gmail.com> wrote:
>No - that doesn't work, im_class gives me the current class - in the
>case of inheritance, I'd like to get the super class which provides
>'bar'.

Oh my.  You said you were doing something evil, but didn't say *how*
evil.  What are you trying to do that you need to know this?


From fuzzyman at gmail.com  Wed Feb 23 07:10:36 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 23 Feb 2005 04:10:36 -0800
Subject: Style guide for subclassing built-in types?
In-Reply-To: <1109151417.903188.73790@f14g2000cwb.googlegroups.com>
References: <ba1e306f.0502221846.70cb4d5c@posting.google.com>
	<1109127834.660822.247120@g14g2000cwa.googlegroups.com>
	<1109150091.356411.150460@l41g2000cwc.googlegroups.com>
	<1109151417.903188.73790@f14g2000cwb.googlegroups.com>
Message-ID: <1109160636.698533.219350@f14g2000cwb.googlegroups.com>


janeaustine50 at hotmail.com wrote:
> Fuzzyman wrote:
> > I guess print is using the __repr__ (or __str__ ?) methods of lsit
-
> > which you will need to override as well.
> >
> > Regards,
> >
> > Fuzzy
> > http://www.voidspace.org.uk/python/index.shtml
>
> Thank you but the problem is that I have to express my intention in
> duplicate places -- __iter__(along with "next"), __str__, __eq__ and
so
> on.
>

If you are sublassing the built in types  I guess you will have to
change all methods that have changed..

an alternative wuld be to not subclass object and override __getattr__
:

class rev_wrap:
    def __init__(self,l):
        self.l=l
    def __getitem__(self,i):
        return self.l[-i-1]
    def __getattr__(self, attr):
        return getattr(self.l, attr)

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml

> p.s. the reason I'm not sticking to reversed or even reverse :
suppose
> the size of the list is huge.



From wangtianthu at gmail.com  Wed Feb  2 18:15:16 2005
From: wangtianthu at gmail.com (Tian)
Date: 2 Feb 2005 15:15:16 -0800
Subject: pyFMOD problem
Message-ID: <39d7536d.0502021515.6c9c5c07@posting.google.com>

I am trying to use pyfmod in python to manipulate sound.
i have installed pyfmod, ctype, numarray (if they are necessary), i
also copied fmod.dll to python/DLLs as well as windows/system32, but
when i tried

   import pyFMOD

I got:

Traceback (most recent call last):
  File "<pyshell#0>", line 1, in -toplevel-
    import pyFMOD
  File "C:\Python24\Lib\site-packages\pyFMOD.py", line 177, in
-toplevel-
    _FSOUND_Sample_Load = getattr(fmod, "_FSOUND_Sample_Load at 16")
  File "C:\Python24\Lib\site-packages\ctypes\__init__.py", line 323,
in __getattr__
    func = self._StdcallFuncPtr(name, self)
AttributeError: function '_FSOUND_Sample_Load at 16' not found
-------------------------------------
How can I deal with this?
Thanks!


From raghulj at gmail.com  Tue Feb 22 06:24:09 2005
From: raghulj at gmail.com (Raghul)
Date: 22 Feb 2005 03:24:09 -0800
Subject: imaplib.error: command COPY illegal in state AUTH
Message-ID: <1109071449.141166.165710@l41g2000cwc.googlegroups.com>

I am getting this error while copying n number of messages to the
folder using imaplib.What to do to copy n number of folders in mail

 The error i got is

imaplib.error: command COPY illegal in state AUTH

I am executing the lines

for i in alluids:
		print i
		print alluids
		copymsg(obj,res,alluids[n],'INBOX') #copy to folder
		deletemsg(ss,alluids[n])  # delete from folder
		n+=1



From ilias at lazaridis.com  Mon Feb 14 05:48:51 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Mon, 14 Feb 2005 12:48:51 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cups17$kbs$1@gemini.csx.cam.ac.uk>
References: <cuo71l$gig$1@usenet.otenet.gr> <cup249$svu$1@gemini.csx.cam.ac.uk>
	<cupqb6$1oi$1@usenet.otenet.gr> <cups17$kbs$1@gemini.csx.cam.ac.uk>
Message-ID: <cupvmh$os2$1@usenet.otenet.gr>

Michael Hoffman wrote:
> Ilias Lazaridis wrote:
> 
>> Michael Hoffman wrote:
>>
>> Can you please point me (and the readers) to this resource?
> 
> http://www.cygwin.com/

thank you.

as far as I know, the created executables are bounded to the GPL.

Thus this is not intresting to me.

>>> Why don't you solve this problem and produce a patched version of 
>>> Python that does what you want.
>>
>> I'm not intrested in patching.
>>
>> I'm intrested in a stable environment, supported by the original
>> implementors.
> 
> And the core developers [...]

please let them speak for themselves.

>> This does not increase my trust in python [e.g. as an exchange for JAVA].
> 
> You cannot run all Java programs on an open source compiler, so I guess
> it's an imperfect world for you. And to get GCJ to run on MinGW you have to
> add a lot of patches.

Python is from its nature open-source.

The requirement "open-source-tool-chain" fits naturally.

>>> Now why haven't *you* produced a version of Python that is directly 
>>> compileable with MinGW? Time's a-wasting.
>>
>> I have stated already that I am a newcomer to python.
>>
>> [you should really avoid this tenor.
> 
> And you should avoid yours. Your sense of entitlement is palpable.

Entitlements result out of reason.

I'm just pointing out.

I've stated simple questions [which are still unanswered]

And I've stated rationales.

>> Python is not an open-source project of a few teenies. It's a serious
>> programming-language, which could be adopted by e.g. more
>> phone-manufacturers (after Nokia)]
> 
> The idea that MinGW support would affect that is laughable.

The idea that the Python Foundation cares about user needs would affect 
that.

The idea that the Python Foundation manages to serve (out of one 
source-code-base) many platforms/compilers with binaries, due to an 
automated, community-supported build system.

This would affect that.

.

-- 
http://lazaridis.com


From alecw at pobox.com  Fri Feb 18 14:33:22 2005
From: alecw at pobox.com (Alec Wysoker)
Date: 18 Feb 2005 11:33:22 -0800
Subject: Trouble with mysql-python 1.2.0 on Solaris 8 sparc
Message-ID: <1108755202.574729.293610@g14g2000cwa.googlegroups.com>

I need to be able to access mySQL 4.0 and 4.1 databases from python.  I
was hoping to find mysql-python 1.2.0 already built for Sparc, but no
such luck.  I've been struggling trying to get it build.  First, I had
to hack setup.py because mysql_config --cflags was returning -m64,
which wasn't right because this is on a 32-bit processor.  Then I got a
warning:

ld: warning: file /usr/local/mysql/lib/libmysqlclient_r.a(libmysql.o):
wrong ELF class: ELFCLASS64

No idea if this is causing my current problem.

Finally, I seemed to get the thing built and installed, but why I try
to import MySQLdb, I get the following:

  File "/usr/local/lib/python2.3/site-packages/MySQLdb/__init__.py",
line 27, in ?
    import _mysql
ImportError: ld.so.1: /usr/local/bin/python: fatal: relocation error:
file /usr/local/lib/python2.3/site-packages/_mysql.so: symbol
mysql_errno: referenced symbol not found

Any advice would be greatly appreciated.

Thanks, 

Alec Wysoker



From grig.gheorghiu at gmail.com  Fri Feb 11 09:31:55 2005
From: grig.gheorghiu at gmail.com (Grig Gheorghiu)
Date: 11 Feb 2005 06:31:55 -0800
Subject: Unit Testing in Python
References: <1108087841.271630.228970@o13g2000cwo.googlegroups.com>
Message-ID: <1108132315.824409.298500@o13g2000cwo.googlegroups.com>

A great place to start for TDD-related stuff is testdriven.com. On the
topic of Python-specific unit testing, there's also a recent thread on
the newly-created extreme-python google group:
http://groups-beta.google.com/group/extreme-python/browse_thread/thread/f39844c4cf6c844f?tvc=2

Grig

====
http://agiletesting.blogspot.com



From gvanrossum at gmail.com  Thu Feb 10 11:10:28 2005
From: gvanrossum at gmail.com (guido@python.org)
Date: 10 Feb 2005 08:10:28 -0800
Subject: is there a safe marshaler?
In-Reply-To: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
Message-ID: <1108051828.483222.62670@z14g2000cwz.googlegroups.com>

Irmen de Jong wrote:
> Pickle and marshal are not safe. They can do harmful
> things if fed maliciously constructed data.
> That is a pity, because marshal is fast.

I think marshal could be fixed; the only unsafety I'm aware of is that
it doesn't always act rationally when confronted with incorrect input
like bad type codes or truncated input. It only receives instances of
the built-in types and it never executes user code as a result of
unmarshalling.

Perhaps someone would be interested in submitting a patch to the
unmarshalling code? Since this is a security fix we'd even accept a fix
for 2.3.

> I need a fast and safe (secure) marshaler.
> Is xdrlib the only option?
> I would expect that it is fast and safe because
> it (the xdr spec) has been around for so long.

I don't expect that to be particularly fast, since it mostly operates
at Python speed.  I think it could be safe but I would still do a
thorough code review if I were you -- the code is older than my
awareness of the vulnerabilities inherent in this kind of remote data
transfer.

--Guido



From brown at esteem.com  Tue Feb  8 19:41:37 2005
From: brown at esteem.com (Tom Brown)
Date: Tue, 8 Feb 2005 16:41:37 -0800
Subject: win32 service and sockets
Message-ID: <200502081641.37483.brown@esteem.com>

Hi,

I created a win32 service for XPPro called N4010ATestService.py (see below). 
The service runs as a particular user with administrative rights. It starts a 
thread that creates a simple socket server (N4010ASocketServer.py -- also 
below) that just waits for 20 character string. When I run the socket server 
by itself the test client can connect to the server and send a 20 character 
string just fine. When I run the service, the server will bind to the port 
but the client cannot connect. I verified the server was listening on the 
given port using netstat -an. The client eventually times out. Why isn't the 
server accepting connections when run in a service?

Thanks,
Tom

N4010ATestService.py:
---------------------
import win32serviceutil
import win32service
import win32event
import N4010ASocketServer
from thread import start_new_thread

class N4010ATestService(win32serviceutil.ServiceFramework):
  _svc_name_ = "N4010ATestService"
  _svc_display_name_ = "N4010A Test Service"
  def __init__(self, args):
    win32serviceutil.ServiceFramework.__init__(self, args)

  def SvcDoRun(self):
     start_new_thread(N4010ASocketServer.main, ())
     N4010ASocketServer.waitfor()

  def SvcStop(self):
    # Before we do anything, tell the SCM we are starting the stop process.
    self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)
    N4010ASocketServer.stop()

if __name__ == '__main__':
  win32serviceutil.HandleCommandLine(N4010ATestService)


N4010ASocketServer.py:
----------------------
from socket import socket
from select import select
from time import sleep
import win32evtlogutil

applicationName = 'N4010ASocketServer'
messageDll = 'C:\Python24\Lib\site-packages\win32\pythonservice.exe'
running = True
stopped = False

def registerWithEventViewer():
  win32evtlogutil.AddSourceToRegistry(applicationName, messageDll)

def stop():
  import servicemanager
  servicemanager.LogInfoMsg('stopping')
  global running
  running = False

def waitfor():
  while not stopped:
    sleep(0.5)

def main():
  import servicemanager
  registerWithEventViewer()
  servicemanager.LogInfoMsg('creating socket')
  sock = socket()
  servicemanager.LogInfoMsg('binding to port 48777')
  sock.bind(('0.0.0.0', 48777))
  servicemanager.LogInfoMsg('listening')
  sock.listen(5)
  while running:
    servicemanager.LogInfoMsg('Waiting for connection.')
    readyRead, readyWrite, inerror = select([sock], [], [], 0)
    while (not readyRead) and running:
      sleep(0.5)
      readyRead, readyWrite, inerror = select([sock], [], [], 0)
    if running:
      conn, address = sock.accept()
      msg = conn.recv(20)
      servicemanager.LogInfoMsg('Recvd msg: %s' % msg)
      conn.close()
  global stopped
  stopped = True


From steven.bethard at gmail.com  Sat Feb 12 19:40:17 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 12 Feb 2005 17:40:17 -0700
Subject: help please
In-Reply-To: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
References: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
Message-ID: <TPKdnU2eEu9xPJPfRVn-vg@comcast.com>

gargonx at gmail.com wrote:
> t2=""
> 
> def Proc(text): # "text" is some random text or use OrigText
>     for word in text:
>         for letter in word:
>             if letter in std.keys():
>                 letter=std[letter]
>                 t2=t2+letter  # the problem is referene to this
>             elif letter in ext.keys():
>                 letter=ext[letter]
>                 t2=t2+letter
>             elif letter in punc.keys():
>                 letter=punc[letter]
>                 t2=t2+letter

As written, t2 is a global because of the statement at the top:

t2=""

Inside Proc, the statement:

                  t2=t2+letter  # the problem is referene to this

declares t2 as local to the function.  (Assignment to a name inside a 
function declares that name as local to the function.)  You could use 
the global keyword, but a better approach would be something like:

replacements = std.items() + ext.items() + punc.items()

def proc(text):
     result = []
     for word in text:
         for k, v in replacements:
             word = word.replace(k, v)
         result.append(word)
     return ''.join(result)

Now, instead of using a global 't2', I simply create a string and return 
it.  Note that I've also replaced your inefficient string addition with 
the more efficient list-append and list-join.

Steve


From mahs at telcopartners.com  Sun Feb  6 23:33:39 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sun, 06 Feb 2005 20:33:39 -0800
Subject: empty classes as c structs?
In-Reply-To: <1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<7rSdne7BcbDeV57fRVn-jg@comcast.com>	<mailman.1963.1107594941.22381.python-list@python.org>	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>	<mailman.1973.1107618702.22381.python-list@python.org>	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>	<mailman.2006.1107658273.22381.python-list@python.org>	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>
	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>
Message-ID: <cu6qrp$nro$1@sea.gmane.org>

Alex Martelli wrote:
> Steven Bethard <steven.bethard at gmail.com> wrote:
> 
> 
>>Hmm... interesting.  This isn't the main intended use of 
>>Bunch/Struct/whatever, but it does seem like a useful thing to have...
>>I wonder if it would be worth having, say, a staticmethod of Bunch that
>>produced such a view, e.g.:
>>
>>class Bunch(object):
>>     ...
>>     @staticmethod
>>     def view(data):
>>         result = Bunch()
>>         result.__dict__ = data
>>         return result
>>
>>Then you could write your code as something like:
>>
>>gbls = Bunch.view(globals())
>>
>>I'm probably gonna need more feedback though from people though to know
>>if this is a commonly desired use case...
> 
> 
> Reasonably so, is my guess.  Witness the dict.fromkeys classmethod -- it
> gives you, on dict creation, the same kind of nice syntax sugar that
> wrapping a dict in a bunch gives you for further getting and setting
> (and with similar constraints: all keys must be identifiers and not
> happen to clash with reserved words).
> 
> I think this ``view'' or however you call it should be a classmethod
> too, for the same reason -- let someone handily subclass Bunch and still
> get this creational pattern w/o extra work.  Maybe a good factoring
> could be something like:
> 
> class Bunch(object):
> 
>     def __init__(self, *a, **k):
>         self.__dict__.update(*a, **k)
> 
>     def getDict(self):
>         return self.__dict__
> 
>     def setDict(self, adict):
>         self.__dict__ = adict
> 
>     theDict = property(getDict, setDict, None, 
>                        "direct access to the instance dictionary"
>                       )
> 
>     @classmethod
>     def wrapDict(cls, adict, *a, **k):
>         result = cls.__new__(cls, *a, **k)
>         result.setDict(adict)
>         cls.__init__(result, *a, **k)
>         return result
> 
> I'm thinking of use cases where a subclass of Bunch might override
> setDict (to do something else in addition to Bunch.setDict, e.g.
> maintain some auxiliary data structure for example) -- structuring
> wrapDict as a classmethod in a ``Template Method'' DP might minimize the
> amount of work, and the intrusiveness, needed for the purpose.  (I don't
> have a real-life use case for such a subclass, but it seems to cost but
> little to provide for it as a possibility anyway).
> 
> [[given the way property works, one would need extra indirectness in
> getDict and setDict -- structuring THEM as Template Methods, too -- to
> fully support such a subclass; but that's a well-known general issue
> with property, and the cost of the extra indirection -- mostly in terms
> of complication -- should probably not be borne here, it seems to me]]
> 
> 
> Alex

Steven et al

I like the idea of making the 'bunch' concept a little more standard.
I also like the suggestion Nick Coghlan cited (not sure who suggested the term 
in this context) of calling this 'namespace' in part because it can lead to 
easily-explained semantics.

ISTM that 'bunch' or 'namespace' is in effect the complement of vars i.e., while 
vars(object) => object.__dict__, namespace(somedict) gives an object whose 
__dict__ is somedict.

Looked at this way, namespace (or bunch) is a minimal implementation of an 
object that implements the hasattr(object,__dict__) protocol.  The effect of the 
class is to make operations on __dict__ simpler.  namespace instances can be 
compared with any other object that has a __dict__.  This differs from the PEP 
reference implementation which compares only with other bunch instances.  In 
practice, comparisons with module and class may be useful.

The class interface implements the protocol and little else.

For 'bunch' applications, namespace can be initialized or updated with keyword 
args (just like a dict)
i.e.,
  >>> bunch = namespace({"a":1,"b":2})
can also be written as
  >>> bunch = namespace(a=1,b=2)

For dict-wrapping applications:
  >>> wrappeddict = namespace(bigdict)
but, unlike the PEP implmentation, this sets wrappeddict.__dict__ = bigdict

I think that this interface allows for either use case, without introducing 
'fromdict' classmethod.

Some dict-operations e.g., __copy__ might carry over to the namespace class

Michael


An implementation follows:


# An alternative implementation of Steven Bethard's PEP XXX 'bunch' with
# slightly different interface and semantics:

class namespace(object):
     """
     namespace(somedict) => object (with object.__dict__ = somedict)
     NB, complement of vars:  vars(object) => object.__dict__

     namespace objects provide attribute access to their __dict__

     In general, operations on namespace equate to the operations
     on namespace.__dict__

     """

     def __init__(self, E = None, **F):
         """__init__([namespace|dict], **kwds) -> None"""
         if isinstance(E, dict):
             self.__dict__ = E
         elif hasattr(E, "__dict__"):
             self.__dict__ = E.__dict__
         self.__dict__.update(**F)

     # define only magic methods to limit pollution
     def __update__(self, E = None, **F):
         """update([namespace|dict], **kwds) -> None
         equivalent to self.__dict__.update
         with the addition of namespace as an acceptable operand"""
         if hasattr(other, "keys"):
             self.__dict__.update(E)
         elif hasattr(other, "__dict__"):
             self.__dict__.update(E.__dict__)
         self.__dict__.update(**F)
     def __repr__(self):
         return "namespace(%s)" % repr(self.__dict__)

     # Possible additional methods:  (All are conveniences for dict operations
     # An operation on namespace translates operation on namespace.__dict__
     # So A op B => A.__dict__ op B.__dict__)

     def __copy__(self):
         return namespace(self.__dict__.__copy__)
     def __eq__(self, other):
         return self.__dict__ == other.__dict__

     def __contains__(self, key):
         return self.__dict__.__contains__(key)
     def __iter__(self):
         return iter(self.__dict__)
     # etc...



From steven.bethard at gmail.com  Tue Feb  1 00:02:18 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 31 Jan 2005 22:02:18 -0700
Subject: Python's idiom for function overloads
In-Reply-To: <mailman.1677.1107230965.22381.python-list@python.org>
References: <mailman.1677.1107230965.22381.python-list@python.org>
Message-ID: <wu6dnUJZeOHJkGLcRVn-3g@comcast.com>

Frans Englich wrote:
> But in Python, when one wants to be able to pass different data types into a 
> single "entry point" for functionality, how is that best done? To in a 
> function do an if statement with the type() function? 

It often depends a lot on the specific use case...  Do you have a 
particular example in mind?

Steve


From rnd at onego.ru  Mon Feb 14 13:25:53 2005
From: rnd at onego.ru (Roman Suzi)
Date: Mon, 14 Feb 2005 21:25:53 +0300 (MSK)
Subject: Recursive __cmp__ in different Python versions
Message-ID: <Pine.LNX.4.62.0502142123060.7861@rnd.onego.ru>


#The following Python code:

class X:
   def __cmp__(self, y):
     print "cmp", self, y
     return cmp(self, y)

x = X()
print x < 10

# gives interesting results under different Python version.
The most common sense in the result in Python 2.4: recursion
limit reached.

Python 2.3 tries 20+ times and then give up.

Python1.5 gives segmentation fault...


Sincerely yours, Roman Suzi
-- 
rnd at onego.ru =\= My AI powered by GNU/Linux RedHat 7.3


From harlinseritt at yahoo.com  Sat Feb  5 04:41:51 2005
From: harlinseritt at yahoo.com (harlinseritt at yahoo.com)
Date: 5 Feb 2005 01:41:51 -0800
Subject: Python Processes for Win32
Message-ID: <1107596511.843557.98180@z14g2000cwz.googlegroups.com>

I have a daemon type script (daemon.py -- we'll say) that I would like
to have run continuously. I'd like to be able to do something like
this:

daemon.py start

... and then to have it stop I'd like to do this:

daemon.py stop

I am having a hard time googling for a clue as to how to accomplish
this. If anyone can point me in the right direction, I'd really
appreciate it.

thanks,

Harlin



From tjreedy at udel.edu  Sun Feb  6 23:16:53 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 6 Feb 2005 23:16:53 -0500
Subject: Word for a non-iterator iterable?
References: <36lu1cF516qtdU1@individual.net>
	<cu4kjo$d8s$1@news2.tilbu1.nb.home.nl>
Message-ID: <cu6q1c$ma6$1@sea.gmane.org>


"vincent wehren" <vincent at visualtrans.de> wrote in message 
news:cu4kjo$d8s$1 at news2.tilbu1.nb.home.nl...
> Leif K-Brooks wrote:
>> Is there a word for an iterable object which isn't also an iterator, and 
>> therefor can be iterated over multiple times without being exhausted?

The 'therefor' above is a non sequitor.  A non-iterator iterable can also 
be non-reiterable.

> How about 'reiterable'?

I agree.  Reiterability is essential for some algorithms, while I am hard 
put to think of a situation in which non-iterator-ness, by itself, is.

Terry J. Reedy






From dformosa at zeta.org.au  Fri Feb 18 23:20:14 2005
From: dformosa at zeta.org.au (? the Platypus {aka David Formosa})
Date: 19 Feb 2005 15:20:14 +1100
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108370491.792820.142200@z14g2000cwz.googlegroups.com>
	<cuprg2$6rt$1@usenet.otenet.gr> <37bcdkF5bg7knU1@individual.net>
	<cupumi$kfs$1@usenet.otenet.gr> <37bel6F59jvkgU1@individual.net>
	<cuq4d6$fqp$1@usenet.otenet.gr>
	<Xns95FD7EAD8A162duncanrcpcouk@127.0.0.1>
	<curb0t$67k$2@usenet.otenet.gr>
Message-ID: <m3hdk9yydd.fsf@dformosa.zeta.org.au>

Ilias Lazaridis <ilias at lazaridis.com> writes:

> Duncan Booth wrote:
[...]

> > It is GPL licensed with an amendment which prevents the GPL
> > spreading to other open source software with which it is linked.
> > "In accordance with section 10 of the GPL, Red Hat, Inc. permits
> > programs whose sources are distributed under a license that complies
> > with the Open Source definition to be linked with libcygwin.a
> > without libcygwin.a itself causing the resulting program to be
> > covered by the GNU GPL."
> 
> If I understand this right, I cannot produce commercial software with
> the cygwin toolset.

You cannot produce proprietary software with that toolset.

-- 
Please excuse my spelling as I suffer from agraphia. See
http://dformosa.zeta.org.au/~dformosa/Spelling.html to find out more.
Free the Memes.


From jfj at freemail.gr  Sun Feb 13 06:34:35 2005
From: jfj at freemail.gr (jfj)
Date: Sun, 13 Feb 2005 03:34:35 -0800
Subject: THREAD_STACK_SIZE and python performance?
In-Reply-To: <mailman.2385.1108124886.22381.python-list@python.org>
References: <mailman.2385.1108124886.22381.python-list@python.org>
Message-ID: <420F3B4B.9030502@freemail.gr>

Stein Morten Sandbech wrote:
> 
> The FreeBSD patch, setting the value to 0x100000
> seems to be enough for most of our zope servers,
> however, I've noticed that we get an occasional
> server death even with this value. This is on normal
> load, but handling many and large CMS operations
> in zope/plone.
> 

Just curious. How much recursion are we talking about here???
Those CMS operations. 100 calls? 1000 calls?

If it's not near that, then the problem should be somewhere else.

> So, any thoughts on even larger thread stacks?

Generally there should be no problems. The only case where the
stack size *may* matter AFAIK, may be threads. Because each thread
has its own stack --in non-stackless python-- stack size may be an issue
if it's too much and there are **many** threads. Otherwise, it should
not have any impact on performance.

jfj

# cure to insomnia: when you lay down, try to figure out
# WTF is wrong with you.




From mahs at telcopartners.com  Fri Feb 25 03:11:52 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 25 Feb 2005 00:11:52 -0800
Subject: accessor/mutator functions
In-Reply-To: <1109315698.002207.245690@g14g2000cwa.googlegroups.com>
References: <1109315698.002207.245690@g14g2000cwa.googlegroups.com>
Message-ID: <cvmmca$7j3$1@sea.gmane.org>

mirandacascade at yahoo.com wrote:
> When I look at how classes are set up in other languages (e.g. C++), I
> often observe the following patterns:
> 1) for each data member, the class will have an accessor member
> function (a Get<whatever> function)
> 2) for each data member, the class will have a mutator member function
> (a Set<whatver> function)
> 3) data members are never referenced directly; they are always
> referenced with the accessor and mutator functions
> 
> My questions are:
> a) Are the three things above considered pythonic?

No

> b) What are the tradeoffs of using getattr() and setattr() rather than
> creating accessor and mutator functions for each data member?

Use property descriptors instead:
http://www.python.org/2.2.1/descrintro.html#property
http://users.rcn.com/python/download/Descriptor.htm#properties

Michael



From mf1987 at arcor.de  Fri Feb 25 14:39:13 2005
From: mf1987 at arcor.de (Markus Franz)
Date: 25 Feb 2005 11:39:13 -0800
Subject: Handle user abort
Message-ID: <576fb15a.0502251139.5cfe4033@posting.google.com>

Hallo!

I use Python mostly for CGI (using Apache). And now I habe a problem:
How can I handle the situation if a user clicks on ?abort? in the
browser?
It seems that a CGI-script is NOT stopped at this point. Is there any
signal send to the CGI-process if the user clicks on ?abort??
Thank you.

Best regards

Markus


From grante at visi.com  Thu Feb 17 14:32:55 2005
From: grante at visi.com (Grant Edwards)
Date: 17 Feb 2005 19:32:55 GMT
Subject: How to wrap a class's methods?
Message-ID: <4214f167$0$44618$a1866201@visi.com>

I want to subclass an IMAP connection so that most of the
methods raise an exception if the returned status isn't 'OK'.
This works, but there's got to be a way to do it that doesn't
involve so much duplication:

class MyImap4_ssl(imaplib.IMAP4_SSL):

    def login(*args):
        s,r = imaplib.IMAP4_SSL.login(*args)
        if s!='OK':
            raise NotOK((s,r))
        return r
        
    def list(*args):
        s,r = imaplib.IMAP4_SSL.list(*args)
        if s!='OK':
            raise NotOK((s,r))
        return r
        
    def search(*args):
        s,r = imaplib.IMAP4_SSL.search(*args)
        if s!='OK':
            raise NotOK((s,r))
        return r
        
    [and so on for another dozen methods]

-- 
Grant Edwards                   grante             Yow!  I OWN six pink
                                  at               HIPPOS!!
                               visi.com            


From sridharinfinity at gmail.com  Tue Feb  1 02:11:58 2005
From: sridharinfinity at gmail.com (Sridhar)
Date: 31 Jan 2005 23:11:58 -0800
Subject: Suggesion for an undergrad final year project in Python
Message-ID: <1107241918.722156.123590@c13g2000cwb.googlegroups.com>

Hi,

I am doing my undergrade CS course.  I am in the final year, and would
like to do my project involving Python.  Our instructors require the
project to have novel ideas.  Can the c.l.p people shed light on this
topic?



From fredrik at pythonware.com  Wed Feb 16 12:40:15 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 16 Feb 2005 18:40:15 +0100
Subject: Getting milliseconds in Python
References: <1108565135.167562.196830@z14g2000cwz.googlegroups.com><37h5epF5ck38lU2@individual.net>
	<1108571009.698970.152020@z14g2000cwz.googlegroups.com>
Message-ID: <cv00cb$kg$1@sea.gmane.org>

"mjs7231" <mjs7231 at gmail.com> wrote:

> "Return the time as a floating point number expressed in seconds since
> the epoch, in UTC. Note that even though the time is always returned as
> a floating point number, not all systems provide time with a better
> precision than 1 second. While this function normally returns
> non-decreasing values, it can return a lower value than a previous call
> if the system clock has been set back between the two calls. "
>
> This is no good, I am looking for milliseconds, not seconds.. as stated
> above.

are you sure you know what a millisecond is?

can you spot the milliseconds here:

>>> import time
>>> time.time()
1108575508.234
>>> time.time()
1108575515.062

or here:

>>> time.clock()
1.6349019714375455
>>> time.clock()
2.2402415685960024
>>> time.clock()
2.7715522631434739

</F> 





From administrata at hotmail.com  Mon Feb 14 17:13:59 2005
From: administrata at hotmail.com (administrata)
Date: 14 Feb 2005 14:13:59 -0800
Subject: [NewBie] Tut0r Thing
Message-ID: <614c778e.0502141413.6b19c091@posting.google.com>

I logged in.

But, don't know how to use it.

and What the hell is digest thing?

Is Tutor Thing like i send questions to someone by e-mailing

and get answers?

HELP :)


From theller at python.net  Fri Feb 25 05:43:52 2005
From: theller at python.net (Thomas Heller)
Date: Fri, 25 Feb 2005 11:43:52 +0100
Subject: automatic nesting and indentation in emacs
References: <c4b57fd0.0502250230.707e5950@posting.google.com>
Message-ID: <k6owvs0n.fsf@python.net>

porterboy76 at yahoo.com (porterboy) writes:

> CONTEXT:
> I am using Emacs to edit Python code and sometimes also Matlab code.
> When I hit <return> in a loop of some sort, Emacs usually gets the
> nesting indentation right, which is particularly important in Python.
> To ensure this I have used python-mode.el and matlab.el modes in
> emacs.
>
> QUESTION:
> If I suddenly decide I want an outer loop, do I have to manually
> readjust the indentation of all the inner loops? Or can emacs do it
> automatically? I know the Matlab in-built editor has a tool called
> "smart-indent" which will automatically align highlighted text to have
> the correct indentation. Does Emacs have something similar?

Mark the lines to be readjusted, then hit 'C-c >' or 'C-c <'.
Or hit 'C-h m' to get an overview for Python mode.

Thomas


From steven.bethard at gmail.com  Mon Feb  7 16:53:17 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 07 Feb 2005 14:53:17 -0700
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <mailman.2112.1107811696.22381.python-list@python.org>
References: <dvOMd.33656$EG1.19314@lakeread04>	<mailman.2105.1107807115.22381.python-list@python.org>	<6sidnS8u8dgsUJrfRVn-2w@comcast.com>
	<mailman.2112.1107811696.22381.python-list@python.org>
Message-ID: <5LidnYdVFsfafprfRVn-qA@comcast.com>

Francis Girard wrote:
> I see. I personnaly use them frequently to bind an argument of a function with 
> some fixed value. Modifying one of the example in 
> http://mail.python.org/pipermail/python-list/2004-December/257990.html
> I frequently have something like :
> 
> SimpleXMLRPCServer.py:  server.register_1arg-place_function(lambda x: x+2, 
> 'add2')

PEP 309 has already been accepted, so I assume it will appear in Python 2.5:

     http://www.python.org/peps/pep-0309.html

Your code could be written as:

     server.register_1arg-place_function(partial(operator.add, 2))

If your task is actually what you describe above -- "to bind an argument 
of a function with some fixed value"[1] -- then in general, you should 
be able to write this as[2]:

     function_with_fixed_value = partial(function, fixed_value)


Steve

[1] As opposed to binding a name to be used in an _expression_ as you do 
in your example.

[2] The partial function can also be used to fix multiple argument 
values and keyword argument values, if that's necessary for your purposes.


From john at except.com.ar  Thu Feb 24 21:53:30 2005
From: john at except.com.ar (John Lenton)
Date: Thu, 24 Feb 2005 23:53:30 -0300
Subject: web status display for long running program
In-Reply-To: <509534af.0502241737.5f62992@posting.google.com>
References: <509534af.0502241737.5f62992@posting.google.com>
Message-ID: <421E932A.9040205@except.com.ar>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Brian Roberts wrote:
| I have a command line Python program that sometimes takes a bit
| (several minutes) to run.  I want to provide an optional method for an
| impatient user (me!) to check the status of the program.  The type and
| amount of status information doesn't fit nicely into a --verbose or
| logger -- either too little or too much information at different
| points.

dd and pppd (and probably others) solve this problem by registering
a signal handler that either toggles debug or prints status
information to stderr.

- --
John Lenton (john at except.com.ar) -- Random fortune:
Work consists of whatever a body is obliged to do.
Play consists of whatever a body is not obliged to do.
		-- Mark Twain
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Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org

iD8DBQFCHpMZcxEeCh6qRm8RAg11AKCek0hV6QCHw6fm3TM3KAJIXPb1RQCg4qhy
HMr5y+w7fxESkJ2vQ0GEmm0=
=c4bs
-----END PGP SIGNATURE-----


From alan.mcintyre at esrgtech.com  Fri Feb  4 12:43:37 2005
From: alan.mcintyre at esrgtech.com (Alan McIntyre)
Date: Fri, 04 Feb 2005 12:43:37 -0500
Subject: "Collapsing" a list into a list of changes
Message-ID: <dvOMd.33656$EG1.19314@lakeread04>

Hi all,

I have a list of items that has contiguous repetitions of values, but 
the number and location of the repetitions is not important, so I just 
need to strip them out.  For example, if my original list is 
[0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5], I want to end up with [0,1,2,3,2,4,5].

Here is the way I'm doing this now:

def straightforward_collapse(myList):
     collapsed = [myList[0]]
     for n in myList[1:]:
         if n != collapsed[-1]:
             collapsed.append(n)

     return collapsed

Is there an elegant way to do this, or should I just stick with the code 
above?

Thanks,
Alan McIntyre
http://www.esrgtech.com


From dfcruz at student.dei.uc.pt  Thu Feb 24 12:17:40 2005
From: dfcruz at student.dei.uc.pt (Daniel Alexandre)
Date: Thu, 24 Feb 2005 17:17:40 +0000
Subject: arrow keys bug
In-Reply-To: <Pine.LNX.4.44.0502241722420.3429-100000@se-126.se.wtb.tue.nl>
References: <Pine.LNX.4.44.0502241722420.3429-100000@se-126.se.wtb.tue.nl>
Message-ID: <52bf187bf9112d42dd7cd9807ea5e112@student.dei.uc.pt>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi there,

On Feb 24, 2005, at 16:25, A.T. Hofkamp wrote:

>> and for home, end, etc. Does anyone here knows how I can strip those
>> keys? Thanks in advance.
>
> One solution is to read the input yourself character by character, and
> delete anything that is not printable.
> Another solution may be to prevent sending non-ASCII to the server, ie 
> check
> such things after enter is pressed.

Thanks for your quick answer, however I'm not sure how I can do any of 
those things.
I would appreciate if you could tell me how to do that, give-me a link 
to a how-to about
that or the location of that in the python-docs, as I can't seem to 
find anything about that.
Thanks in advance.

- -- 
Best Regards,
Daniel Alexandre ( dfcruz at student.dei.uc.pt )
PGP Public Key: http://student.dei.uc.pt/~dfcruz/pubring.html
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=j+Yb
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From ncoghlan at iinet.net.au  Fri Feb  4 22:51:48 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 05 Feb 2005 13:51:48 +1000
Subject: changing local namespace of a function
In-Reply-To: <cu15eq$lso$1@joe.rice.edu>
References: <cu0lru$8ik$1@joe.rice.edu> <11082ntjhddo357@corp.supernews.com>
	<cu15eq$lso$1@joe.rice.edu>
Message-ID: <420442D4.8000308@iinet.net.au>

Bo Peng wrote:
> Jeff Shannon wrote:
> 
>>
>> This sounds to me like you're trying to re-implement object orientation.
>>
> 
> I have no control over the big dictionaries. All I need to do is 
> processing them in situ --- that is to say, go into each map and 
> manipulate numbers. Parameter passing should be avoid whenever possible 
> since involved number of items are huge.

No, all parameter passing does is pass a pointer to the dictionary - it doesn't 
copy the dictionary itself.

> It is basically like
> 
>   exec 'statements' in d
> 
> but a function with local dictionary d would be best.

Why? How do you know that the performance is unacceptable?

If you *really* want to execute a function with different locals, then you can do:

Py> def f():
...   print x + y
...
Py> exec f.func_code in dict(x=1, y=2)
3

This is unreliable though, since name binding doesn't work correctly:

Py> def f():
...   z = x + y
...
Py> d = dict(x=1, y=2)
Py> exec f.func_code in d
Py> d['z]
Py> d['z']
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
KeyError: 'z'
Py> exec "z = x + y" in d
Py> d['z']
3

An approach like Michael's is going to be much easier to debug, much easier to 
understand later, and far more reliable all the way along. The performance is 
almost certainly going to be acceptable.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From python at hope.cz  Wed Feb  2 10:12:31 2005
From: python at hope.cz (python at hope.cz)
Date: 2 Feb 2005 07:12:31 -0800
Subject: CONTEST - What is the (best) solution?
In-Reply-To: <1107350983.411793.146600@g14g2000cwa.googlegroups.com>
References: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
	<1107350983.411793.146600@g14g2000cwa.googlegroups.com>
Message-ID: <1107357151.234804.187440@g14g2000cwa.googlegroups.com>


Fuzzyman wrote:
> Can your dictionaries contain dictionaries ?
>
> If not you can read the file and cut at the first '}' and the last
'{'.
> The two chunks will then be a single dictionary which can be eval'd.
>
> *However* your example above does not show ',' between all of the
> pairs... but only some. This will bugger you royally (because you
can't
> even replace '\n' with ','). You'd then need to parse the two chunks
> and correct.....
> Regards,
>
>
Hi Fuzzy,
dictionaries can NOT contain dictionaries.
I re-checked and I would need only the last dictionary.
Any idea how I could do that?
Thanks
Lad.



From pobrien at orbtech.com  Mon Feb 14 14:31:16 2005
From: pobrien at orbtech.com (Pat)
Date: 14 Feb 2005 11:31:16 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr><cupupa$kfs$2@usenet.otenet.gr>
	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>
	<cuqqqi$ep1$1@ctb-nnrp2.saix.net>
	<1108407625.250592.104280@c13g2000cwb.googlegroups.com>
	<jN0XedqDmPECFwnz@objmedia.demon.co.uk>
Message-ID: <1108409476.874751.16600@l41g2000cwc.googlegroups.com>

Stephen Kellet said:

<quote>
Pat, could you include some context in your replies? I have no idea if
you are replying to my comments about Visual Studio Express or someone
else? The only text I see in your replies is what you write, no text
from the posting you are replying to. As it is I've ignored all your
replies so far as I'm not sure I'm the person you are addressing (until
I saw the above, now I'm confused).
</quote>

Sorry about that.  I'm replying using Google Groups and making a total
mess of things.  :-(

David Fraser asked if I had tried to compile a Python extension for
Python 2.4 using minGW.  I said that I had not (but I have for Python
2.3.5).  Here is the rest of my reply, for future reference:

We ran into some issues with Python 2.4 that caused us
to return to Python 2.3.5.  But I would really like to upgrade to
Python 2.4.  So I started researching the subject before I did
anything.

If you are telling me that minGW can compile extensions that are
compatible with the Python 2.4 that uses msvcr71.dll, then that is good
news indeed.  Is there anything that needs to be configured or patched
to make this happen?  And how does minGW know which dll to link?  What
if I have both versions of Python installed - 2.3.5 and 2.4?  Is there
an easy way to detect this and switch between the two dlls?

If I'm asking questions already answered elsewhere, I'd love a link to
that resource, if you have it.

Patrick K. O'Brien
Orbtech    http://www.orbtech.com
Schevo     http://www.schevo.org
Pypersyst  http://www.pypersyst.org



From fuzzyman at gmail.com  Mon Feb 28 09:11:23 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 28 Feb 2005 06:11:23 -0800
Subject: Newbie question
In-Reply-To: <cvv8k2$19ov$1@newsreader02.ops.uunet.co.za>
References: <cvv8k2$19ov$1@newsreader02.ops.uunet.co.za>
Message-ID: <1109599883.324733.115400@z14g2000cwz.googlegroups.com>

Functions for manipulating images are contained in the 'PIL' extension
- the Python Imaging Library. You'll find it with google.

regards,

Fuzzy
http://www.voidsapce.org.uk/python/index.shtml



From grante at visi.com  Tue Feb  1 22:49:59 2005
From: grante at visi.com (Grant Edwards)
Date: 02 Feb 2005 03:49:59 GMT
Subject: getting data from a port in use
References: <mailman.1731.1107314935.22381.python-list@python.org>
Message-ID: <42004de7$0$21660$a1866201@visi.com>

On 2005-02-02, Dana Marcusanu <dmarcusanu at yahoo.com> wrote:

> Yes. I want to write a very small web sniffer that gets data
> from a specified port.

OK, know we know what you're actually trying to do.  You should
have told us that to start with rather than leading us down the
wrong path with your little Python program.  When asking for
help, always clearly describe your _problem_ first.  Asking
what's wrong with a proposed solution without clearly
describing the problem you're trying to solve just wastes time:

http://www.catb.org/~esr/faqs/smart-questions.html

> I already looked at some of the existing ones on Internet, but
> they are not in Python (I am trying to learn Python!)

You picked a rather tricky little project.

> and they have a lot more features that I want. Thanks for your
> suggestion. I will check out pcap library.

Pcap is your only hope unless you want to do a lot of rather
nasty low level stuff (for which you'll probably have to write
a bunch of C code that does all the things that libpcap does).

You can't use the normal Python socket API to sniff data.  

You _could_ use popen to run tcpdump (which in turn uses pcap)
and then parse the output from pcap. I've done both, and IMO
using pcap directly is a lot easier.  It's also your only hope
of keeping up with any amount of traffic.

http://sourceforge.net/projects/pylibpcap
http://sourceforge.net/project/showfiles.php?group_id=14007&package_id=13826

Once upon a time, there was a rumor that somebody had a Win32
version of pylibpcap.

Good luck.  :)

-- 
Grant Edwards                   grante             Yow!  Did an Italian CRANE
                                  at               OPERATOR just experience
                               visi.com            uninhibited sensations in
                                                   a MALIBU HOT TUB?


From scottmallory at gmail.com  Tue Feb 22 16:42:02 2005
From: scottmallory at gmail.com (scottmallory at gmail.com)
Date: 22 Feb 2005 13:42:02 -0800
Subject: Grid issues
Message-ID: <1109108522.556064.279490@z14g2000cwz.googlegroups.com>

Greetings,
I am new to Python...and I am having some difficulty updating a grid
(wx.grid.PyGridTableBase). Everything works just fine (adding
/deleting/ resizing rows, cols) except updating individual cells.

I am using the grids to display data from a database (which is working
fine), I am trying to use the SetValue (as well as self.data[r][c] =
string and others ) method but it does not seem to work. I am at a
lost.

Here is the call to the UpdateRowData function:

self.frame.grid_4.GetTable().UpdateRowData(ndata, ndata[0][0],
len(ndata[0]))

frame id wxFrame
ndata is a list
ndata[0][0] is the row number to update
len(ndata[0]) is the number of columns for the table

Here is the class for your review.

Any help would be most appreciated.
Scott




#-----------------------------------------------------------------
class DataTable(wx.grid.PyGridTableBase):

    def __init__(self, headers=(['h','h','h']),
data=(['a','a','a'],['b','b','b'])):
        wx.grid.PyGridTableBase.__init__(self)
        self.headers = headers
        self.data = data


    def GetNumberRows(self):                            #  Called from
__init__
        return len(self.data)


    def GetNumberCols(self):                            #  Called from
__init__
        return len(self.headers)


    def GetColLabelValue(self, col):                    #  Called from
__init__
        return self.headers[col]


    def GetValue(self, row, col):                        # Called from
__init__
        # Get Value is for updating the Table on screen
        try:
            return self.data[row][col]
        except KeyError:
            pass

    def IsEmptyCell(self, row, col):                     # Called from
__init__
        #print "empty Cell", row, col
        try:
            if self.data[row][col] != "":
                return True
            else:
                return False
        except:
            return False

#--------- END __INIT__ Calls


    #def RemoveData(self,rowNum):
    #    self.data.pop()
    #    msg = wx.grid.GridTableMessage(self,
wx.grid.GRIDTABLE_NOTIFY_ROWS_DELETED,  len(self.data),  1)
    #    self.GetView().ProcessTableMessage(msg)

    def AddData(self, ndata):
        #print "Add Data"
        for i in ndata:
            self.data.append(i)

        msg1 = wx.grid.GridTableMessage(
self,wx.grid.GRIDTABLE_NOTIFY_ROWS_APPENDED, len(ndata) )
        msg2 = wx.grid.GridTableMessage(
self,wx.grid.GRIDTABLE_REQUEST_VIEW_GET_VALUES )

        for msg in [ msg1, msg2]:
            self.GetView().ProcessTableMessage(msg)


    def UpdateRowData(self, ndata, row, col):
        num = self.GetNumberRows()

        if row <= num:
            for i in range(col):
                #print ndata[i]
                sr = ndata[0][i]
                print i, sr
                self.SetValue(row, i, str(sr))
                #self.SetCellValue(row, i, str(sr))  ?????
        else:
            for i in ndata:
                self.data.append(i)

            msg1 = wx.grid.GridTableMessage(
self,wx.grid.GRIDTABLE_NOTIFY_ROWS_APPENDED, len(ndata) )
            self.GetView().ProcessTableMessage(msg1)

        msg = wx.grid.GridTableMessage(
self,wx.grid.GRIDTABLE_REQUEST_VIEW_GET_VALUES )
        self.GetView().ProcessTableMessage(msg)


    def SetValue(self, row, col, value):
        try:
            self.data[row][col] = value

            msg = wx.grid.GridTableMessage(
self,wx.grid.GRIDTABLE_REQUEST_VIEW_GET_VALUES )
            self.GetView().ProcessTableMessage(msg)
        except IndexError:
            print "FAIL"
#------------------------------ End DataTable Class



From ajsiegel at optonline.com  Sat Feb  5 13:04:22 2005
From: ajsiegel at optonline.com (Arthur)
Date: Sat, 05 Feb 2005 13:04:22 -0500
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
Message-ID: <qb1a01lk3mv4vp852q88prqb9al336h9r2@4ax.com>

On Sat, 5 Feb 2005 17:00:15 +0100, aleaxit at yahoo.com (Alex Martelli)
wrote:
>
>I consider this one of the worst ideas to have been proposed on this
>newsgroup over the years, which _IS_ saying something. \

I would disagree, but only to the extent that nothing that is only a
request for an option toggle should qualify for this award.  For
anyone not interested in it's effects, it's business as usual.  

They can even reward themselves with the knowledge that among the time
and typing they did not waste was in asking for the toggle to be on.

It is also true that mplementation might be a diversion of efforts
from the implementation of features solving more generally recognized
problems. There *are* a lot of bad things to say about the idea. 

But I think it worth mentioning that the OP is requesting only a
toggle.

Why is it worth mentioning?

Because maybe one needs to save the heaviest rhetoric for when this is
not the case.

There was a simple answer to those who hate decorators - don't use
them. I won't.

And the most controversial suggestions about optional static typing
all perserve their sanity by remaining suggestions about something
defined as optional.

Generally speaking, it might then be said to be good community poilcy
to hold one's fire at least a bit if a feature request, or accepted
PEP, will not impact one's own code writing beyond the extent one
might choose  it to.

Though I  do think there *should* be a worst feature request contest
at PyCon,   

What is with this white space business, anyway?

;)

Art


From Serge.Orlov at gmail.com  Thu Feb 10 06:59:51 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: 10 Feb 2005 03:59:51 -0800
Subject: sre is broken in SuSE 9.2
References: <mailman.2299.1108029731.22381.python-list@python.org>
Message-ID: <1108036791.098550.306310@g14g2000cwa.googlegroups.com>

Denis S. Otkidach wrote:
> On all platfroms \w matches all unicode letters when used with flag
> re.UNICODE, but this doesn't work on SuSE 9.2:
>
> Python 2.3.4 (#1, Dec 17 2004, 19:56:48)
> [GCC 3.3.4 (pre 3.3.5 20040809)] on linux2
> Type "help", "copyright", "credits" or "license" for more
information.
> >>> import re
> >>> re.compile(ur'\w+', re.U).match(u'\xe4')
> >>>
>
> BTW, is correctly recognize this character as lowercase letter:
> >>> import unicodedata
> >>> unicodedata.category(u'\xe4')
> 'Ll'
>
> I've looked through all SuSE patches applied, but found nothing
related.
> What is the reason for broken behavior?  Incorrect configure options?

I can get the same results on RedHat's python 2.2.3 if I pass re.L
option, it looks like this option is implicitly set in Suse.

  Serge



From marian at mba-software.de  Wed Feb 16 04:27:19 2005
From: marian at mba-software.de (=?ISO-8859-1?Q?Marian_Aldenh=F6vel?=)
Date: Wed, 16 Feb 2005 10:27:19 +0100
Subject: pyFMOD writing a callback function in Python
In-Reply-To: <420bab9a_1@news.unc.edu>
References: <370m88F525p5uU1@individual.net> <brasff8a.fsf@python.net>
	<420bab9a_1@news.unc.edu>
Message-ID: <37gi02F56u5rfU1@individual.net>

Hi,

> Check out pySonic, a new FMOD wrapper written with Pyrex. Much more Pythonic.

I have only found Win32-Downloads. The same is true for pyFMOD. What options
do I have to make it work on Linux?

Ciao, MM
-- 
Marian Aldenh?vel, Rosenhain 23, 53123 Bonn. +49 228 624013.
http://www.marian-aldenhoevel.de
"Wir brauchen keine Opposition, wir sind bereits Demokraten."


From hc at hoersch.de  Fri Feb 25 02:33:41 2005
From: hc at hoersch.de (=?ISO-8859-1?Q?HC_H=F6rsch?=)
Date: Fri, 25 Feb 2005 08:33:41 +0100
Subject: Converting HTML to ASCII
In-Reply-To: <mailman.3027.1109294801.22381.python-list@python.org>
References: <mailman.3027.1109294801.22381.python-list@python.org>
Message-ID: <cvmkmq$qh$04$1@news.t-online.com>

Try Beautiful Soup!

> 1) Be able to handle badly formed, or illegal, HTML,
> as best as possible. 
 From the description:
"It won't choke if you give it ill-formed markup: it'll just give you access to 
a correspondingly ill-formed data structure."

> Can anyone direct me to something which could help me
> for this?
http://www.crummy.com/software/BeautifulSoup/

Hans Christian


From steven.bethard at gmail.com  Thu Feb 24 17:00:46 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 24 Feb 2005 15:00:46 -0700
Subject: Interesting decorator use.
In-Reply-To: <mailman.3017.1109277781.22381.python-list@python.org>
References: <421e2398@nntp0.pdx.net>
	<mailman.3017.1109277781.22381.python-list@python.org>
Message-ID: <M5adncYw-5gT04PfRVn-ug@comcast.com>

Tom Willis wrote:
> Question on decorators in general. Can you parameterize those?
> 
> If I wanted to something and after the function call for example, I
> would expect something like this would work.
> 
> def prepostdecorator(function,pre,post):
>     def wrapper(*args,**kwargs):
>         pre()
>         result =  function(*args,**kwargs)
>         post()
>         return result
>     return wrapper
> 
> def dopre():
>     print "call pre"
> 
> def dopost():
>     print "call post"
> 
> @prepostdecorator(pre,post)
> def sayhello(Name):
>     print "Hey %s, nice to meet you" % Name
> 
> #sayhello = prepostdecorator(sayhello,dopre,dopost)
> 
> if __name__=="__main__":
>     sayhello("Dude")
> 
> but I get ...
> TypeError: prepostdecorator() takes exactly 3 arguments (2 given)

You get this TypeError for the same reason that I get the following 
TypeError:

py> def prepostdecorator(function, pre, post):
...     pass
...
py> prepostdecorator(1, 2)
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
TypeError: prepostdecorator() takes exactly 3 arguments (2 given)

The expression after @ is a _normal Python expression_.  So since you 
couldn't call prepostdecorator with 2 arguments in any other situation, 
you still can't.

If you want to call prepostdecorator with 2 arguments, you need to write 
it this way.  A few options:

(1) Use nested functions:

py> def prepostdecorator(pre,post):
...     def decorator(function):
...         def wrapper(*args,**kwargs):
...             pre()
...             result =  function(*args,**kwargs)
...             post()
...             return result
...         return wrapper
...     return decorator
...
py> @prepostdecorator(dopre, dopost)
... def sayhello(name):
...     print "Hey %s, nice to meet you" % name
...
py> sayhello('Tom')
call pre
Hey Tom, nice to meet you
call post

(2) Use functional.partial (PEP 309[1])

py> def prepostdecorator(pre, post, function):
...     def wrapper(*args,**kwargs):
...         pre()
...         result =  function(*args,**kwargs)
...         post()
...         return result
...     return wrapper
...
py> @partial(prepostdecorator, dopre, dopost)
... def sayhello(name):
...     print "Hey %s, nice to meet you" % name
...
py> sayhello('Tom')
call pre
Hey Tom, nice to meet you
call post

(3) Use a class:

py> class prepostdecorator(object):
...     def __init__(self, pre, post):
...         self.pre, self.post = pre, post
...     def __call__(self, function):
...         def wrapper(*args,**kwargs):
...             self.pre()
...             result = self.function(*args,**kwargs)
...             self.post()
...             return result
...         return wrapper
py> @prepostdecorator(dopre, dopost)
... def sayhello(name):
...     print "Hey %s, nice to meet you" % name
...
py> sayhello('Tom')
call pre
Hey Tom, nice to meet you
call post

Note that in all of the above cases, the result of evaluating the 
expression after the @ is a callable object that takes _exactly one_ 
argument, the function to be decorated.

HTH,

STeVe

[1] http://www.python.org/peps/pep-0309.html


From bearophileHUGS at lycos.com  Wed Feb  2 08:04:30 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 2 Feb 2005 05:04:30 -0800
Subject: set, dict and other structures
In-Reply-To: <1107348872.587834.24150@g14g2000cwa.googlegroups.com>
References: <1107214762.198058.55680@f14g2000cwb.googlegroups.com>
	<JgALd.1731$sR5.1418@trndny05>
	<pan.2005.02.01.03.09.37.49281@jerf.org>
	<1107348872.587834.24150@g14g2000cwa.googlegroups.com>
Message-ID: <1107349470.083741.138140@f14g2000cwb.googlegroups.com>

r = {}
for x in a: if x not in b: r[x] = r[a]
for x in b: if x not in a: r[x] = r[b]

I know, this is wrong :-]
This looks better:
r = {}
for x in a: if x not in b: r[x] = a[x]
for x in b: if x not in a: r[x] = b[x]

Bearophile



From benn at cenix-bioscience.com  Wed Feb  2 05:16:30 2005
From: benn at cenix-bioscience.com (Neil Benn)
Date: Wed, 02 Feb 2005 11:16:30 +0100
Subject: Save the Canvas!
In-Reply-To: <e5063e96.0502011615.2d182c77@posting.google.com>
References: <e5063e96.0502011615.2d182c77@posting.google.com>
Message-ID: <4200A87E.8040604@cenix-bioscience.com>

Sean McIlroy wrote:

>I'd like to be able to save a Tkinter Canvas in a format other than
>postscript (preferably gif). Is there a tool out there for
>accomplishing that? Any help will be much appreciated.
>
>Peace,
>STM
>  
>
I was massively disappointed, I thought this was a lead up to a protest 
march!

Save the Canvas!
Long live the ComboBox!!
Free the ScrollPane!!

    Sorry.... in a funny mood.

Cheers,

Neil

-- 

Neil Benn
Senior Automation Engineer
Cenix BioScience
BioInnovations Zentrum
Tatzberg 46
D-01307
Dresden
Germany

Tel : +49 (0)351 4173 154
e-mail : benn at cenix-bioscience.com
Cenix Website : http://www.cenix-bioscience.com



From luke at tatooine.planet  Mon Feb  7 21:07:06 2005
From: luke at tatooine.planet (Luke Skywalker)
Date: Tue, 08 Feb 2005 03:07:06 +0100
Subject: Big development in the GUI realm
References: <mailman.2123.1107820051.22381.python-list@python.org>
	<4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com>
	<cu95nd$7cr$1@news1.ucsd.edu>
Message-ID: <6h7g0113up1v76k7qkad7bt17os1q73510@4ax.com>

On Mon, 07 Feb 2005 17:47:30 -0800, Robert Kern <rkern at ucsd.edu>
wrote:
>Now, that's not to say that they are correct in their interpretation of 
>the GPL's terms. In fact, if I had to bet on an outcome, I'd probably 
>wager that the court would hold that only static linking would force the 
>program as a whole to follow the GPL terms. However, I certainly don't 
>have the money to pony up to run a test case. Consequently, I try to 
>follow the wishes of the copyright holder.

It's strange that something so central hasn't been clarified yet, but
maybe it's part of the changes meant for V.3.

When you think about it, it'd be like banning any closed-source apps
from being developed for Linux, since any application makes syscalls
to the kernel and its libraries.

But the fact is that there are now closed-source apps for that
platform, and are considered legit since those apps don't include code
from the kernel, but instead, merely make calls to binary objects. I
fail to see the difference between making calls to the kernel API and
making calls to Qt libraries.

Luke.


From newstonne at web.de  Wed Feb  2 18:21:43 2005
From: newstonne at web.de (Roland Heiber)
Date: Thu, 03 Feb 2005 00:21:43 +0100
Subject: Generating .pyc/.pyo from a make file
In-Reply-To: <dh38d2-at71.ln1@eskimo.tundraware.com>
References: <4308d2-0801.ln1@eskimo.tundraware.com>
	<42015a85_1@news.arcor-ip.de>
	<dh38d2-at71.ln1@eskimo.tundraware.com>
Message-ID: <4201607f_2@news.arcor-ip.de>

Tim Daneliuk wrote:
> It does - thanks.  One more question:  Are pyc and pyo file portable
> across operating systems?  I suspect not since I generated a pyo
> on a FreeBSD machine that will not run on a Win32 machine.  I was
> under the impression that "compiled" meant optimized byte code that
> was portable across implementations, but it looks to not be the case...
> 

Hi,

.pyc's should be, cause it's standard python-bytecode, if you use 
massive optimizations it depends not on the os but on the underlying 
cpu/architecture ...

So long, Roland


From phil at freehackers.org  Wed Feb  2 04:27:43 2005
From: phil at freehackers.org (Philippe Fremy)
Date: Wed, 02 Feb 2005 10:27:43 +0100
Subject: Next step after pychecker
In-Reply-To: <mailman.1726.1107313882.22381.python-list@python.org>
References: <41ff0308$0$6503$636a15ce@news.free.fr>	<cto5b9$hpi$1@swifty.westend.com>
	<369mivF4ubv6mU1@individual.net>	<200502012113.26393.francis.girard@free.fr>
	<mailman.1726.1107313882.22381.python-list@python.org>
Message-ID: <42009d13$0$24304$636a15ce@news.free.fr>

Skip Montanaro wrote:
>     Francis> "Every well-formed expression of the language can be assigned a
>     Francis> type that can be deduced from the constituents of the
>     Francis> expression alone." Bird and Wadler, Introduction to Functional
>     Francis> Programming, 1988
> 
>     Francis> This is certainly not the case for Python since one and the
>     Francis> same variable can have different types depending upon the
>     Francis> execution context. Example :
> 
>     Francis> 1- if a is None:
>     Francis> 2-   b = 1
>     Francis> 3- else:
>     Francis> 4-   b = "Phew"
>     Francis> 5- b = b + 1
> 
>     Francis> One cannot statically determine the type of b by examining the
>     Francis> line 5- alone.
> 
> Do you have an example using a correct code fragment?  It makes no sense to
> infer types in code that would clearly raise runtime errors:

On the contrary, the point of type inference is to detect such errors. 
If the program was always well-formed, there would be no point in 
developing a type inference tool.

	Philippe


From googlinggoogler at hotmail.com  Sat Feb 12 18:17:32 2005
From: googlinggoogler at hotmail.com (googlinggoogler at hotmail.com)
Date: 12 Feb 2005 15:17:32 -0800
Subject: Text files read multiple files into single file,
	and then recreate the multiple files
Message-ID: <1108250252.479092.298670@z14g2000cwz.googlegroups.com>

Hiya,

The title says it all really, but im a newbie to python sort of. I can
read in files and write files no probs.

But what I want to do is read in a couple of files and output them to
one single file, but then be able to take this one single file and
recreate the files I put into it.

Im really at a loss as to how I go about recovering the files?
obviously if i scan for a string that specifys the start and end of
each file, theres the chance that the file might contain this term to
which would split the files into unwanted chucks of file, which wouldnt
be wanted.

Any ideas? code snippets? 

Im very grateful!



From greg at invalid.invalid  Sun Feb  6 13:41:27 2005
From: greg at invalid.invalid (Greg Krohn)
Date: Sun, 06 Feb 2005 18:41:27 GMT
Subject: newbie wants to compile python list of filenames in selected
 directories
In-Reply-To: <36n60uF520lfaU1@individual.net>
References: <36n60uF520lfaU1@individual.net>
Message-ID: <rxtNd.1848$mG6.132@newsread1.news.pas.earthlink.net>

anthonyberet wrote:
> Hi, I am new at Python, and very rusty at the one language I was good 
> at, which was BASIC.
> 
> I want to write a script to compare filenames in chosen directories, on 
> windows machines. Ideally it would compose a list of strings of all the 
> filenames in the directories, and those directories would be chosable by 
> the user of the script.
> 
> I am quite happy to do my own legwork on this , I realise it is simple 
> stuff, but can anyone point me in the right direction to start?
> 
> Thanks

os.listdir does almost exactly what you are asking for. For a little 
more flexibility, you can use os.path.walk, although it's not quite as 
newb friendly.

-greg


From bulk at upperorbit.com  Tue Feb 22 16:23:09 2005
From: bulk at upperorbit.com (Tim Knauf)
Date: Wed, 23 Feb 2005 10:23:09 +1300
Subject: Mixing Txinter and Pygame
In-Reply-To: <opsmlc7ld2rqur0o@eb.pragmadev>
References: <mailman.2908.1109031345.22381.python-list@python.org>
	<opsmlc7ld2rqur0o@eb.pragmadev>
Message-ID: <421BA2BD.8050105@upperorbit.com>

Eric Brunel wrote:

>
> Well, since these are just exceptions, a simple try... except block 
> would be fine, and you can even figure out the reason for the 
> exception. Here is what I'd do:
> - when you create your Tkinter main window, initialize an attribute 
> that you'll use to see if the application has quit, e.g 
> mainwin.hasQuit = False
> - rewrite doquit this way:
> def doquit():
>     if os.access('recalc.tmp', os.F_OK):
>         os.remove('recalc.tmp')
>     mainwin.hasQuit = True
>     pygame.quit()
> - rewrite your custom event loop this way:
> while 1:
>     gameLoop()
>     pygame.time.wait(10)
>     try:
>       mainwin.update()
>     except TclError:
>       if not mainwin.hasQuit:
>         raise
>
> And: (1) your problem should go away; (2) the "real" exceptions you 
> may get from Tkinter windows should not passed unnoticed.
>
>
I adapted your suggestion slightly, and my final event loop looks like this:

while not mainwin.hasQuit:
    try:
        gameLoop()
    except pygame.error:
        if not mainwin.hasQuit:
            raise
    pygame.time.wait(10)
    try:
        mainwin.update()
    except Tkinter.TclError:
        if not mainwin.hasQuit:
            raise

That seems to work perfectly. Thanks, Eric!

> Incomplete, but very useful: 
> http://www.pythonware.com/library/tkinter/introduction/index.htm
> But the best reference documentation you'll ever find is the tcl/tk 
> man pages, on-line here: http://www.tcl.tk/man/tcl8.4/TkCmd/contents.htm
> It unfortunately requires to know how to convert the tcl/tk syntax to 
> Python/Tkinter syntax, but it is actually quite easy (mainly read 
> "option=value" when the tcl/tk documentation says "-option value")

Ah, yes, I had managed to find the pythonware.com pages in my travels, 
and they proved quite helpful. Good to know about the man pages, too. 
(When I'm starting on a language feature, though, I usually find I learn 
a lot more from worked examples than from straight command information. 
I have friends who are just the opposite, so I suppose it's just a 
learning styles thing.)

wxPython seems to be highly regarded. I might experiment with that for 
my next project, and see which framework I like the best. Thanks again.


From harlinseritt at yahoo.com  Thu Feb 17 07:09:40 2005
From: harlinseritt at yahoo.com (Harlin)
Date: 17 Feb 2005 04:09:40 -0800
Subject: MYSQL - how to install ?
In-Reply-To: <mailman.2753.1108640484.22381.python-list@python.org>
References: <1108547199.260223.211450@f14g2000cwb.googlegroups.com>
	<1108556905.444394.210020@l41g2000cwc.googlegroups.com>
	<1108562949.825258.297260@f14g2000cwb.googlegroups.com>
	<mailman.2686.1108564423.22381.python-list@python.org>
	<1108635996.165520.132960@o13g2000cwo.googlegroups.com>
	<mailman.2753.1108640484.22381.python-list@python.org>
Message-ID: <1108642180.928733.112360@c13g2000cwb.googlegroups.com>

Sorry about the mis-read. Keep in mind that if you're doing this on
win32 (and it looks like you are), you can use ODBC a bit easier. :)



From maxm at mxm.dk  Tue Feb  1 08:59:50 2005
From: maxm at mxm.dk (Max M)
Date: Tue, 01 Feb 2005 14:59:50 +0100
Subject: Remove HTML tags (except anchor tag) from a string using regular
 expressions
In-Reply-To: <mailman.1687.1107259469.22381.python-list@python.org>
References: <mailman.1687.1107259469.22381.python-list@python.org>
Message-ID: <41FF8B56.5020109@mxm.dk>

Nico Grubert wrote:

If it's not to learn, and you simply want it to work, try out this library:

http://zope.org/Members/chrisw/StripOGram/readme


-- 

hilsen/regards Max M, Denmark

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


From harlinseritt at yahoo.com  Sun Feb 27 10:05:00 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 27 Feb 2005 07:05:00 -0800
Subject: How to define a window's position (Tkinter)
Message-ID: <1109516700.351898.72850@l41g2000cwc.googlegroups.com>

I am trying to use the geometry() method with the toplevel window
called root. I know that one can do the following:

root.geometry('400x400+200+200')

This will put the window in 200, 200 position with a size of 400x400.
Now, I don't really want to set the size. I simply want to set the
position of the window. I've tried this:

root.geometry('200+200')

However, this doesn't seem to work. What can I do to set the position
of the window without actually setting the size?

Thanks,

Harlin



From tom.willis at gmail.com  Wed Feb 16 11:04:13 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Wed, 16 Feb 2005 11:04:13 -0500
Subject: low-end persistence strategies?
In-Reply-To: <7xpsz04kdq.fsf@ruckus.brouhaha.com>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<mailman.2688.1108566050.22381.python-list@python.org>
	<7xpsz04kdq.fsf@ruckus.brouhaha.com>
Message-ID: <b54d0489050216080428180150@mail.gmail.com>

Oops missed that sorry.

Carry on.

On Wed, 16 Feb 2005 07:29:58 -0800 (PST), Paul Rubin
<"http://phr.cx"@nospam.invalid> wrote:
> Tom Willis <tom.willis at gmail.com> writes:
> > Sounds like you want pickle or cpickle.
> 
> No, the issue is how to handle multiple clients trying to update the
> pickle simultaneously.
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
Thomas G. Willis
http://paperbackmusic.net


From newsgroups at jhrothjr.com  Wed Feb 16 16:47:48 2005
From: newsgroups at jhrothjr.com (John Roth)
Date: Wed, 16 Feb 2005 15:47:48 -0600
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net>
Message-ID: <1117ftnc7vqh0d5@news.supernews.com>

"Leo Breebaart" <leo at lspace.org> wrote in message 
news:37hippF4gcimiU1 at individual.net...
> I've tried Googling for this, but practically all discussions on
> str.join() focus on the yuck-ugly-shouldn't-it-be-a-list-method?
> issue, which is not my problem/question at all.
>
> What I can't find an explanation for is why str.join() doesn't
> automatically call str() on its arguments, so that e.g.
> str.join([1,2,4,5]) would yield "1245", and ditto for e.g.
> user-defined classes that have a __str__() defined.
>
> All I've been able to find is a 1999 python-dev post by Tim
> Peters which would seem to indicate he doesn't understand it
> either:
>
>    "string.join(seq) doesn't currently convert seq elements to
>     string type, and in my vision it would. At least three of us
>     admit to mapping str across seq anyway before calling
>     string.join, and I think it would be a nice convenience
>     [...]"
>
> But now it's 2005, and both string.join() and str.join() still
> explicitly expect a sequence of strings rather than a sequence of
> stringifiable objects.
>
> I'm not complaining as such -- sep.join(str(i) for i in seq) is
> not *that* ugly, but what annoys me is that I don't understand
> *why* this was never changed. Presumably there is some
> counter-argument involved, some reason why people preferred the
> existing semantics after all. But for the life of me I can't
> think what that counter-argument might be...

I was originally going to say performance, but I don't think
that's all that much of an issue.

For me, at least, I've already got a way of taking just about
anything and turning it into a string: the % operator. It's
powerful enough that there have been attempts to make
a less powerful and simpler to understand version.

The limitation here is that you have to know how many
elements you want to join, although even that isn't the
world's hardest issue. Consider:

(untested)
result = ("%s" * len(list)) % list

Not the most obvious code in the world, but it might
work.

And as someone else (you?) pointed out, this will
also work:

(untested)
result = "".join([str(x) for x in list])

and it's got the advantage that it will handle separators
properly.

John Roth

>
> -- 
> Leo Breebaart  <leo at lspace.org> 



From grante at visi.com  Mon Feb 14 12:22:19 2005
From: grante at visi.com (Grant Edwards)
Date: 14 Feb 2005 17:22:19 GMT
Subject: ValueError: invalid literal for int(): 1.0000000000e+00
References: <mailman.2544.1108400507.22381.python-list@python.org>
Message-ID: <4210de4b$0$41646$a1866201@visi.com>

On 2005-02-14, Martin MOKREJ? <mmokrejs at ribosome.natur.cuni.cz> wrote:

> is this a bug or "feature" that I have to use float() to make int() autoconvert
> from it?

It's a feature.  Integers don't have decimal points...

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


From fuzzyman at gmail.com  Wed Feb 23 07:46:00 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 23 Feb 2005 04:46:00 -0800
Subject: Attaching to a Python Interpreter a la Tcl
In-Reply-To: <1109155068.468295.121630@f14g2000cwb.googlegroups.com>
References: <1109155068.468295.121630@f14g2000cwb.googlegroups.com>
Message-ID: <1109162760.147702.326770@o13g2000cwo.googlegroups.com>

Do you mean making the interpreter available from within a Python app ?

There are various ways of doing that - you can see the SPE editor which
uses pycrust as one example. http://spe.pycs.net

You could also embed IPython for a good interface to the interpreter.
http://ipython.scipy.net

Regards,


Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From jzgoda at gazeta.usun.pl  Thu Feb 17 05:02:45 2005
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Thu, 17 Feb 2005 11:02:45 +0100
Subject: Stable GUI
In-Reply-To: <1108632340.607048.119820@l41g2000cwc.googlegroups.com>
References: <c0e7fd79.0502160619.565eb40e@posting.google.com>
	<1108564589.069982.71680@o13g2000cwo.googlegroups.com>
	<1108569376.721830.67370@o13g2000cwo.googlegroups.com>
	<1108632340.607048.119820@l41g2000cwc.googlegroups.com>
Message-ID: <cv1qcn$59o$1@nemesis.news.tpi.pl>

Lars napisa?(a):

> The only problem I've ever encountered was with updating Tk widgets
> from threads in a threaded app - it won't work. The solution was
> nothing worse than using an output queue, and having an event check the
> output buffer every second or so.

I know literally no GUI toolkit, that allows direct updating of GUI 
objects from any other thread that the one which created them. Some even 
do not allow updating from any other thread than main application thread 
and this may be really painful.

-- 
Jarek Zgoda
http://jpa.berlios.de/ | http://www.zgodowie.org/


From http  Tue Feb  1 00:38:33 2005
From: http (Paul Rubin)
Date: 31 Jan 2005 21:38:33 -0800
Subject: python and gpl
References: <m3oef6xm1l.fsf@peds-pc311.bsd.uchicago.edu>
	<mailman.1661.1107206116.22381.python-list@python.org>
Message-ID: <7xy8e8vnza.fsf@ruckus.brouhaha.com>

Tim Churches <tchur at optushome.com.au> writes:
> >The question is: does shipping a backend which imports a module that
> > links with GPL code make some or all of the library GPL.
> We sought formal legal advice on this issue from a lawyer with
> expertise in open source licensing ...> 
> The answer was that the GPL does not apply to combination of code at
> run-time. Specifically, Section 0., Para 1 (assuming zero-based
> paragraph numbering...) says:> 
> "Activities other than copying, distribution and modification are not
> covered by this License; they are outside its scope. The act of
> running the Program is not restricted,..."

My IANAL amateur reading is that the GPL does in fact apply, at least
in the US.  Running the program is not restricted, but loading the
program from disk to memory before you can run it counts as copying
it, which invokes the license, Computer Associates v. Altai, 982 F.2d
693.  I personally believe that doctrine is insane, but that's what
software companies pushed through the courts in order to make
shrink-wrap EULA's enforceable.  (Otherwise they'd only be enforceable
if you agreed to the terms before the vendor got your money).

> Furthermore, Section 2 para 1 says: "These requirements apply to the
> modified work as a whole. If identifiable sections of that work are
> not derived from the Program, and can be reasonably considered
> independent and separate works in themselves, then this License, and
> its terms, do not apply to those sections when you distribute them
> as separate works. ..."

That means you can run your separate program all by itself without
needing to load the GPL module.

> and Section 2 para 3 says:
> 
> "In addition, mere aggregation of another work not based on the
> Program with the Program (or with a work based on the Program) on a
> volume of a storage or distribution medium does not bring the other
> work under the scope of this License."

That means the two programs have nothing to do with each other.

> On the basis of these clauses, the legal advice to us was that merely
> including "import rpy" and making calls to RPy-wrapped R functions
> does not invoke the provisions of the GPL because these calls only
> relate to run-time linking, which is not covered by the GPL. 

According to the FSF, it doesn't matter whether the linking is static
or dynamic; the GPL applies to both cases.

> Note that the formal advice was specific to Australian law, 

Oh ok, that might be different from US law.  Do you have EULA's there
that are considered enforceable?

> The other, informal advice, was to ignore the FAQs and other opinions
> on the FSF web site regarding intepretation of the GPL - it's only the
> license text which counts.

Ultimately, what really counts are court decisions.  The FSF enforces
the GPL against infringers all the time, and in each case so far, the
infringer has backed down voluntarily because they didn't like their
chances in court.


From paddy3118x at netscape.net  Thu Feb  3 16:58:01 2005
From: paddy3118x at netscape.net (Paddy McCarthy)
Date: Thu, 03 Feb 2005 21:58:01 GMT
Subject: variable declaration
In-Reply-To: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
Message-ID: <4202A022.3050209@netscape.net>

Alexander Zatvornitskiy wrote:
> Hello All!
> 
> I'am novice in python, and I find one very bad thing (from my point of view) in
> language. There is no keyword or syntax to declare variable, like 'var' in
> Pascal, or special syntax in C. It can cause very ugly errors,like this:
> 
> epsilon=0
> S=0
> while epsilon<10:
>   S=S+epsilon
>   epselon=epsilon+1
> print S
> 
> It will print zero, and it is not easy to find such a bug!
> 
> Even Visual Basic have 'Option Explicit' keyword! May be, python also have such
> a feature, I just don't know about it?
> 
> Alexander, zatv at bk.ru
Advocates always say Type Checking, but so often it seems like Type 
Constriction. - To hell with it!
I don't believe I would be more productive by cluttering Python with the 
Type schemes and variable declarations found in languages like Pascal, 
C, Basic, C++ and Java.
People have said that there may be a more intelligent way, maybe type 
inferencing? But no, please, nothing like the above, it would just get 
in the way.

-- Paddy.


From shotgunlee at hotmail.com  Wed Feb 16 01:18:57 2005
From: shotgunlee at hotmail.com (Wonjae Lee)
Date: Wed, 16 Feb 2005 15:18:57 +0900
Subject: "perl -p -i -e" trick in Python?
Message-ID: <cuuol5$2ri$1@news1.kornet.net>

I read the comment of
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/277753.
(Title : Find and replace string in all files in a directory)

"perl -p -i -e 's/change this/..to this/g'" trick looks handy.
Does Python have a similar trick? Or, is there a shorter Python recipe for
the given problem?





From plumpy321 at yahoo.com  Fri Feb 18 04:07:05 2005
From: plumpy321 at yahoo.com (plumpy321 at yahoo.com)
Date: 18 Feb 2005 01:07:05 -0800
Subject: wxPython and thread memory problems?
Message-ID: <1108717625.695249.128610@l41g2000cwc.googlegroups.com>

Hi,

       I took an example from wxPython with the IE web browser and
created a refresh button to automatically refresh a web page in 5
second intervals.  But I notice that the memory utilization in Python
keeps increasing over time.  Can anyone tell me why this is happening?
Here is my code:

============================================================================

import wx, re
import time, thread
from urlparse import *

if wx.Platform == '__WXMSW__':
    import  wx.lib.iewin    as  iewin

refresh = 0

#----------------------------------------------------------------------

class TestPanel(wx.Panel):
    def __init__(self, parent, frame=None):
        wx.Panel.__init__(
            self, parent, -1,
            style = wx.TAB_TRAVERSAL |
                    wx.CLIP_CHILDREN |
                    wx.NO_FULL_REPAINT_ON_RESIZE
            )

        self.current = "http://www.google.com"
        self.frame = frame

        if frame:
            self.titleBase = frame.GetTitle()

        sizer = wx.BoxSizer(wx.VERTICAL)
        btnSizer = wx.BoxSizer(wx.HORIZONTAL)

        self.ie = iewin.IEHtmlWindow(self, -1, style =
wx.NO_FULL_REPAINT_ON_RESIZE)

        btn = wx.Button(self, -1, "Open", style=wx.BU_EXACTFIT)
        self.Bind(wx.EVT_BUTTON, self.OnOpenButton, btn)
        btnSizer.Add(btn, 0, wx.EXPAND|wx.ALL, 2)

        btn = wx.Button(self, -1, "Home", style=wx.BU_EXACTFIT)
        self.Bind(wx.EVT_BUTTON, self.OnHomeButton, btn)
        btnSizer.Add(btn, 0, wx.EXPAND|wx.ALL, 2)

        btn = wx.Button(self, -1, "<--", style=wx.BU_EXACTFIT)
        self.Bind(wx.EVT_BUTTON, self.OnPrevPageButton, btn)
        btnSizer.Add(btn, 0, wx.EXPAND|wx.ALL, 2)

        btn = wx.Button(self, -1, "-->", style=wx.BU_EXACTFIT)
        self.Bind(wx.EVT_BUTTON, self.OnNextPageButton, btn)
        btnSizer.Add(btn, 0, wx.EXPAND|wx.ALL, 2)

        btn = wx.Button(self, -1, "Stop", style=wx.BU_EXACTFIT)
        self.Bind(wx.EVT_BUTTON, self.OnStopButton, btn)
        btnSizer.Add(btn, 0, wx.EXPAND|wx.ALL, 2)

        btn = wx.Button(self, -1, "Search", style=wx.BU_EXACTFIT)
        self.Bind(wx.EVT_BUTTON, self.OnSearchPageButton, btn)
        btnSizer.Add(btn, 0, wx.EXPAND|wx.ALL, 2)

        btn = wx.Button(self, -1, "Refresh", style=wx.BU_EXACTFIT)
        self.Bind(wx.EVT_BUTTON, self.OnRefreshPageButton, btn)
        btnSizer.Add(btn, 0, wx.EXPAND|wx.ALL, 2)

        btn = wx.Button(self, -1, "AutoRefresh", style=wx.BU_EXACTFIT)
        self.Bind(wx.EVT_BUTTON, self.OnAutoRefreshPageButton, btn)
        btnSizer.Add(btn, 0, wx.EXPAND|wx.ALL, 2)

        txt = wx.StaticText(self, -1, "Location:")
        btnSizer.Add(txt, 0, wx.CENTER|wx.ALL, 2)

        self.location = wx.TextCtrl(self, -1, "",
style=wx.TE_PROCESS_ENTER)

        self.location.Bind(wx.EVT_CHAR, self.OnLocationReturn)
        btnSizer.Add(self.location, 1, wx.EXPAND|wx.ALL, 2)

        sizer.Add(btnSizer, 0, wx.EXPAND)
        sizer.Add(self.ie, 1, wx.EXPAND)

        self.ie.LoadUrl(self.current)

        self.SetSizer(sizer)
        # Since this is a wxWindow we have to call Layout ourselves
        self.Bind(wx.EVT_SIZE, self.OnSize)

        # Hook up the event handlers for the IE window
        self.Bind(iewin.EVT_DocumentComplete, self.OnDocumentComplete,
self.ie)

        thread.start_new_thread(self.refresh_url, (5,))

    def OnSize(self, evt):
        self.Layout()

    def OnLocationReturn(self, evt):
        if evt.KeyCode() == wx.WXK_RETURN:
            self.ie.Navigate(self.location.GetValue(),
                 iewin.NAV_NoReadFromCache | iewin.NAV_NoWriteToCache)
        else:
            evt.Skip()

    def OnOpenButton(self, event):
        dlg = wx.TextEntryDialog(self, "Open Location",
                                "Enter a full URL or local path",
                                self.current, wx.OK|wx.CANCEL)
        dlg.CentreOnParent()

        if dlg.ShowModal() == wx.ID_OK:
            self.current = dlg.GetValue()
            self.ie.Navigate(self.current,
                 iewin.NAV_NoReadFromCache | iewin.NAV_NoWriteToCache)

        dlg.Destroy()

    def OnHomeButton(self, event):
        self.ie.GoHome()    ## ET Phone Home!

    def OnPrevPageButton(self, event):
        self.ie.GoBack()

    def OnNextPageButton(self, event):
        self.ie.GoForward()

    def OnStopButton(self, evt):
        self.ie.Stop()

    def OnSearchPageButton(self, evt):
        self.ie.GoSearch()

    def OnRefreshPageButton(self, evt):
        self.ie.RefreshPage(iewin.REFRESH_COMPLETELY)

    def OnAutoRefreshPageButton(self, evt):
        global refresh
        refresh = not refresh

    def refresh_url(self, delay):
        global refresh
        while (1):
            time.sleep(delay)
            if refresh:
                self.ie.Navigate(self.ie._get_LocationURL(),
                    iewin.NAV_NoReadFromCache |
iewin.NAV_NoWriteToCache)

    def OnDocumentComplete(self, evt):
        self.current = evt.URL
        self.location.SetValue(self.current)

class Frame(wx.Frame):
    def __init__(self, parent=None, id=-1, title='Title',
                 pos=wx.DefaultPosition, size=(640, 480)):
        wx.Frame.__init__(self, parent, id, title, pos, size)

        self.attr = {}
        self.attr['panel'] = TestPanel(self)

class App(wx.App):
    def OnInit(self):
        self.attr = {}

        self.attr['frame'] = Frame(title='My Window')
        self.attr['frame'].Show()
        self.SetTopWindow(self.attr['frame'])

        return True

def main():
    app = App()
    app.MainLoop()

if __name__ == '__main__':
    main()


#----------------------------------------------------------------------



From m at m.com  Tue Feb  8 16:04:10 2005
From: m at m.com (m)
Date: Tue, 08 Feb 2005 15:04:10 -0600
Subject: Python versus Perl ?
In-Reply-To: <42091b9c$0$28977$e4fe514c@news.xs4all.nl>
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com><hkhc01dnpmmhn980quijqil40653qipdki@4ax.com>	<cuavn1$bag$1@nntp.msstate.edu>
	<mailman.2207.1107888646.22381.python-list@python.org>
	<cub3av$dso$1@nntp.msstate.edu>
	<42091b9c$0$28977$e4fe514c@news.xs4all.nl>
Message-ID: <cub9gb$ikj$2@nntp.msstate.edu>

Irmen de Jong wrote:
> m wrote:

> Why do you care?
> Have you read http://www.python.org/moin/PythonSpeed ?
> 
> --Irmen
i had not read it. thanks for pointing it out!



From foo at bar.com  Wed Feb 23 20:15:34 2005
From: foo at bar.com (Steve Menard)
Date: Wed, 23 Feb 2005 20:15:34 -0500
Subject: Communication between JAVA and python
In-Reply-To: <421ce234$0$12950$626a14ce@news.free.fr>
References: <421ce234$0$12950$626a14ce@news.free.fr>
Message-ID: <ZU9Td.136989$Rg.2555986@weber.videotron.net>

Jacques Daussy wrote:
> Hello
> How can I transfert information between a JAVA application and a python 
> script application. I can't use jython because, I must use python 
> interpreter.I think to socket or semaphore, but can I use it on Windows 
> plateform ?
> 
> thanks a lot
> 
> jack 
> 
> 

Well, it all depends on the exact deployment scenario you;re facing.

If you're java program can be embedded dinside hte python scripts, then 
JPype (see my sig at the bottom of this post) can certainly help you.

Otherwise ... Is there a java way to "access" you java program from 
outside it's process? I mean things like RMI servers, or EJBs. If so, 
again JPype can take the place of a "java" client.

If not, there is no magic. You must first find a way to contact you Java 
process. If that remote-call technology is "standard", i.e. Something 
like SOAP or XML-RPC, then you can find a python technology to access 
it. If its not standard, but tehre is a Java way to use it, Again jpype 
can be your friend.

If you can tell us more about the nature of each program (Python and 
Java) we may be better able to help you.

-- 
Steve Menard
--------------------
Maintainer of http://jpype.sourceforge.net


From rschroev_nospam_ml at fastmail.fm  Sun Feb 13 09:35:57 2005
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sun, 13 Feb 2005 14:35:57 GMT
Subject: For American numbers
In-Reply-To: <sYSdnX7Zq4NGwZLfRVn-uA@powergate.ca>
References: <420e7376$1@nntp0.pdx.net> <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
	<%DBPd.10409$Lf6.440348@phobos.telenet-ops.be>
	<sYSdnX7Zq4NGwZLfRVn-uA@powergate.ca>
Message-ID: <hBJPd.10842$JM2.669756@phobos.telenet-ops.be>

Peter Hansen wrote:
> Roel Schroeven wrote:
> 
>> Peter Hansen wrote:
>>
>>> Scott David Daniels wrote:
>>>
>>>> Kind of fun exercise (no good for British English).
>>>>
>>>>     def units(value, units='bytes'):
>>>>         magnitude = abs(value)
>>>>         if magnitude >= 1000:
>>>>             for prefix in ['kilo mega giga tera peta '
>>>>                            'exa zetta yotta').split():
>>>>                 magnitude /= 1000.
>>>>                 if magnitude < 1000.:
>>>>                     break
>>>
>>>
>>>
>>>
>>> Only for hard drive manufacturers, perhaps.
>>
>>
>>
>> And physicists and chemists and engineers and all other kinds of 
>> scientists all over the world. Plus those of us in the computer world 
>> who agree that 'kilo == 1024' is an abomination that should never have 
>> existed and which we should get rid of as fast as possible.
> 
> 
> Physicists and chemists (and most engineers) don't go around
> talking about "kilobytes" all that often, and when they do
> it's generally unimportant whether they mean 1000 or 1024.

Scientists and engineers use kilo as a prefix for all kinds of units, 
and it means 1000 regardless of what unit it is used with. Except when 
used with bytes and some other units, and I feel that that is a 
historical misfeature.

> Given the clear "units='bytes'" default above, and my restricting
> my comments to "the rest of the computer world", it should be
> clear I was talking about a very limited subset of the planet.

"units='bytes'" means that 'bytes' is the default, but also that the 
function can be called with any other unit.

> A subset, however, which has an extremely strong attachment to
> 1024 instead of 1000 (for very good reasons),

Well, in computer science 1024 is often more practical than 1000, I'm 
not going to argue that. My point is that 1024 is not 1000 (though it is 
quite close, unfortunately), so another prefix should have been chosen 
to represent it. I don't mind interchanging 1000 and 1024 in informal 
contexts, but I think a clear distinction is needed in other cases:

- the difference between 1000 and 1024 is only 2.4%, but the difference 
between 1 GB and 1GiB is 7.4. That can IMO no longer be looked at as 
insignificant.
- computer scientists are used to having everyting just right. We're 
used to compilers that cannot deal with the slightest typo, TCP doesn't 
work right if we're ACKing the wrong sequence numbers. In the view of 
that, it feels ackward that we're so sloppy with unit prefixes.

History has tought is that standardization is a good thing, and I think 
we should start using the existing standard (SI) as it is inteded to be 
used: k as a prefix equals 1000, regardless of the context. I agree that 
'kibi', 'mebi' and 'gibi' sound silly, but I think it's better to use 
silly sounding units than units of which you can never be really sure 
what they mean.

> less likely to abandon backwards compatibility and widely accept
> 1000 than the US is likely to adopt metric widely in the near
> future...

I'm afraid you're right, but I think we should at least try.

In fact, I don't really understand that: computer science is a modern 
science, computers and other digital devices are modern stuff, but still 
the computer world is super tradionalist about this. The worst part is 
that it's a tradition we invented ourselves which is in contradiction 
with an older, commonly accepted tradition.

-- 
"Codito ergo sum"
Roel Schroeven


From fredrik at pythonware.com  Mon Feb 14 15:58:08 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 21:58:08 +0100
Subject: [Errno 18] Invalid cross-device link using os.rename
References: <1108414124.890402.109480@z14g2000cwz.googlegroups.com>
Message-ID: <cur37u$lj9$1@sea.gmane.org>

Scott Whitney wrote:

> os.rename(oldName,newName) gives:
>
> OSError: [Errno 18] Invalid cross-device link
>
> mv from the shell works fine.
>
> This is Python 2.2.3 from RedHat 9.0.
>
> Any suggestions (other than os.system('mv %s %s')?)

catch exception and copy if error == errno.EXDEV.

(this is what "mv" does, of course)

or use shutil.move:

>>> import shutil
>>> help(shutil.move)
Help on function move in module shutil:

move(src, dst)
    Recursively move a file or directory to another location.

    If the destination is on our current filesystem, then simply use
    rename.  Otherwise, copy src to the dst and then remove src.
    A lot more could be done here...  A look at a mv.c shows a lot of
    the issues this implementation glosses over.

</F> 





From kent37 at tds.net  Wed Feb 23 07:29:55 2005
From: kent37 at tds.net (Kent Johnson)
Date: Wed, 23 Feb 2005 07:29:55 -0500
Subject: On eval and its substitution of globals
In-Reply-To: <1109136736.670038.236040@z14g2000cwz.googlegroups.com>
References: <1108828170.372593.150790@g14g2000cwa.googlegroups.com>
	<1109136736.670038.236040@z14g2000cwz.googlegroups.com>
Message-ID: <421c7423$1_1@newspeer2.tds.net>

Paddy wrote:
> Hi,
> I got tripped up on the way eval works with respect to modules and
> so wrote a test.
> 
> It seems that a function carries around knowledge of the globals()
> present
> when it was defined. (The .func_globals attribute)?
> 
> When evaluated using eval(...) the embedded globals can be overridden
> with
> the one passed through the eval(...) call
> 
> If however you create a new function that calls the first then eval's
> global argument is only substituted in the outer call!
> 
> TEST:
> =====
> 
>>>>def f1(): return A < B
> 
> ...
> 
>>>>def z(): return f1()
> 
> ...
> 
>>>>eval(f1.func_code,dict(A=1,B=2))
> 
> True
> 
>>>>eval(z.func_code,dict(A=1,B=2, f1=f1))
> 
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "<stdin>", line 1, in z
>   File "<stdin>", line 1, in f1
> NameError: global name 'A' is not defined
> 
> 
> ENDTEST
> =======
> 
> Is there a way to do a deep substitution of the globals?

A workaround is to implement z() using eval() again, this forces f1() to use the same globals passed 
to z():
  >>> def z(): return eval(f1.func_code)
  ...
  >>> eval(z.func_code,dict(A=1,B=2, f1=f1))
True

Kent

> 
> I should add that f1 is given as-is. I can modify z,
> and f1 is just one of many functions given and function z
> is some boolean function of the f<n>'s
> 
> Thanks, Pad.
> 


From jgrahn-nntq at algonet.se  Fri Feb 25 16:27:54 2005
From: jgrahn-nntq at algonet.se (Jorgen Grahn)
Date: 25 Feb 2005 21:27:54 GMT
Subject: Converting HTML to ASCII
References: <mailman.3066.1109357511.22381.python-list@python.org>
Message-ID: <slrnd1v5vv.nhu.jgrahn-nntq@frailea.sa.invalid>

On Fri, 25 Feb 2005 10:51:47 -0800 (PST), gf gf <unknownsoldier93 at yahoo.com> wrote:
> Hans,
> 
> Thanks for the tip.  I took a look at Beatiful Soup,
> and it looked like it was a framework to parse HTML. 

This is my understanding, too.

> I'm not really interetsed in going through it tag by
> tag - just to get it converted to ASCII.  How can I do
> this with B. Soup?

You should probably do what some other poster suggested -- download lynx or
some other text-only browser and make your code execute it in -dump mode to
get the text-formatted html. You'll get that working in an hour or so, and
then you can see if you need something more complicated.

/Jorgen

-- 
  // Jorgen Grahn <jgrahn@       Ph'nglui mglw'nafh Cthulhu
\X/                algonet.se>   R'lyeh wgah'nagl fhtagn!


From http  Fri Feb  4 02:42:55 2005
From: http (Paul Rubin)
Date: 03 Feb 2005 23:42:55 -0800
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<kavad2-59d.ln1@eskimo.tundraware.com>
	<7xlla5t3lw.fsf@ruckus.brouhaha.com>
	<g9ibd2-kuf.ln1@eskimo.tundraware.com>
Message-ID: <7xmzukwz28.fsf@ruckus.brouhaha.com>

Tim Daneliuk <tundra at tundraware.com> writes:
> [other good stuff from Tim snipped]
> > Today I think most seeks can be eliminated by just using ram or SSD
> > (solid state disks) instead of rotating disks.  But yeah, you wouldn't
> > do that on a laptop.
> 
> But that still does not solve the latency problem of session
> establishment/ teardown over network fabric which is the Achilles
> Heel of the web and web services.

Well, HTTP 1.1 keepalives takes care of some of that, but really,
really, most of this problem is server side, like when you browse a
Wikipedia page it might take a few seconds, which isn't good, but when
you update it, it takes most of a minute, which is awful.  The
difference is that editing means server side web cache misses followed
by a database update that affects numerous indices.

Wikipedia keeps having these fundraising drives to buy more server CPU
iron (I've donated a few times) but I wonder if they'd be better off
spending it on solid state disks and/or software reorganization.


From deetsNOSPAM at web.de  Mon Feb 28 05:04:48 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 28 Feb 2005 11:04:48 +0100
Subject: Why do descriptors (and thus properties) only work on
	attributes.
References: <slrnd25nve.d87.apardon@rcpc42.vub.ac.be>
	<7xoee5kpiv.fsf@ruckus.brouhaha.com>
	<slrnd25pj4.d87.apardon@rcpc42.vub.ac.be>
Message-ID: <38g8hvF5oc44qU1@individual.net>

Antoon Pardon wrote:

> Op 2005-02-28, Paul Rubin schreef <http>:
>> Antoon Pardon <apardon at forel.vub.ac.be> writes:
>>> Can anyone explain why descriptors only work when they are an attribute
>>> to an object or class.  I think a lot of interesting things one can
>>> do with descriptors would be just as interesting if the object stood
>>> on itself instead of being an attribute to an other object.
>>
>> How would that work?
> 
> Well AFAIU a descriptor is an object with at least one method out of
> __get__, __set__ or __del__. I don see why implicitly calling one
> of these methods would be any more difficult when they are autonomous
> objects than when they are attributes.

I still don't see how that is supposed to work for "a lot of interesting
things". Can you provide examples for one of these interesting things?

-- 
Regards,

Diez B. Roggisch


From bearophileHUGS at lycos.com  Sun Feb 20 11:09:14 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 20 Feb 2005 08:09:14 -0800
Subject: Real-Time Fluid Dynamics for Games...
In-Reply-To: <cv9oum$7og$1@newsreader.mailgate.org>
References: <cv9oum$7og$1@newsreader.mailgate.org>
Message-ID: <1108915754.064554.62100@z14g2000cwz.googlegroups.com>

Your two email addresses bouce emails back, so I post a shortened
version of my comment here.
I haven't installed:
PyOpenGL-2.0.2.01.py2.4-numpy23
glut-3.7.6
Therefore at the moment I cannot try your interesting code.
What's the speed of this Python code on your computer?
I'd like to see a screenshoot of the running Python Program...

Some people are doing in Python some things that require lots of
computations, like:
http://www.joachim-bauch.de/projects/python/pytrace

Bye,
Bearophile



From mwm at mired.org  Sun Feb 13 17:06:51 2005
From: mwm at mired.org (Mike Meyer)
Date: Sun, 13 Feb 2005 16:06:51 -0600
Subject: Kill GIL
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<cum62t$3fb$1@panix2.panix.com>
	<mailman.2463.1108256227.22381.python-list@python.org>
	<868y5t6sal.fsf@guru.mired.org> <cumoue$9ur$1@panix2.panix.com>
Message-ID: <86sm405d38.fsf@guru.mired.org>

aahz at pythoncraft.com (Aahz) writes:

> In article <868y5t6sal.fsf at guru.mired.org>, Mike Meyer  <mwm at mired.org> wrote:
>>
>>Here here. I find that threading typically introduces worse problems
>>than it purports to solve.
> Threads are also good for handling blocking I/O.

Actually, this is one of the cases I was talking about. I find it
saner to convert to non-blocking I/O and use select() for
synchronization. That solves the problem, without introducing any of
the headaches related to shared access and locking that come with
threads.

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From steven.bethard at gmail.com  Fri Feb 11 18:07:48 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 11 Feb 2005 16:07:48 -0700
Subject: check if object is number
In-Reply-To: <mailman.2424.1108162312.22381.python-list@python.org>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>	<374ho0F560ughU1@individual.net>	<66WdnbJbuf5yj5DfRVn-iA@comcast.com>
	<mailman.2424.1108162312.22381.python-list@python.org>
Message-ID: <2qqdncYQ5aBdp5DfRVn-ow@comcast.com>

John Lenton wrote:
> On Fri, Feb 11, 2005 at 01:17:55PM -0700, Steven Bethard wrote:
> 
>>George Sakkis wrote:
>>
>>>"Steven Bethard" <steven.bethard at gmail.com> wrote in message
>>>news:gcidnb9g_ojxnpDfRVn-tA at comcast.com...
>>>
>>>
>>>>Is there a good way to determine if an object is a numeric type?
>>>
>>>In your example, what does your application consider to be numeric?
>>
>>Well, here's the basic code:
>>
>>def f(max=None):
>>    ...
>>    while max is None or n <= max:
>>        ...
>>        # complicated incrementing of n
>>
>>So for 'max', technically all I need is <= support.  However, the code 
>>also depends on the fact that after incrementing 'n' enough, it will 
>>eventually exceed 'max'.  Currently, ints, longs, floats, and Decimals 
>>will all meet this behavior.  But I'd rather not specify only those 4 
>>(e.g. with a typecheck), since someone could relatively easily create 
>>their own new numeric type with the same behavior.  Do you know a better 
>>way to test for this kind of behavior?
> 
> 
> Why don't you express just this need as an assertion?
> 
>     assert 0 <= max <= max + 1, 'Argument must not be zany'

Well a TypeError might be raised in executing the expression:

py> max = complex(0, 1)
py> assert 0 <= max <= max + 1, 'Argument must not be zany'
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
TypeError: cannot compare complex numbers using <, <=, >, >=

but I do like the max <= max + 1 idea.  Maybe I should do something like:

py> def assertnumber(x):
...     try:
...         1 < x
...     except TypeError:
...         raise TypeError('%s is not comparable to int' %
...                         type(x).__name__)
...     try:
...         if not x <= x + 1:
...             raise TypeError
...     except TypeError:
...         raise TypeError('%s is not monotonic' %
...                         type(x).__name__)
...
py> assertnumber(1)
py> assertnumber(1.0)
py> assertnumber(complex(0, 1))
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
   File "<interactive input>", line 5, in assertnumber
TypeError: complex is not comparable to int
py> assertnumber('a')
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
   File "<interactive input>", line 11, in assertnumber
TypeError: str is not monotonic
py> class C(object):
...     def __add__(self, other):
...         return 0
...     def __lt__(self, other):
...         return True
...
py> assertnumber(C())
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
   File "<interactive input>", line 11, in assertnumber
TypeError: C is not monotonic

Steve


From HotHOT2 at comcast.net  Sun Feb 13 16:54:50 2005
From: HotHOT2 at comcast.net (Hottime)
Date: Sun, 13 Feb 2005 16:54:50 -0500
Subject: Wow!, This chick is HOT!                        LZl6:Tu
Message-ID: <L-ednSRgss61oY3fRVn-vg@comcast.com>

          .
----------------------------------

Want to get laid tonight??  Find local girls now

http://www.youandmeswing.com/index.php?ref_id=130


----------------------------------






,iy^3aQvw


From Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org  Sat Feb  5 03:31:43 2005
From: Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org (Alexander)
Date: Sat, 05 Feb 2005 11:31:43 +0300
Subject: variable declaration
References: <4202A022.3050209@netscape.net>
Message-ID: <MSGID_2=3A5025=2F3.131_4204b0a9@fidonet.org>

Hi Paddy!

03 Feb 2005 at 21:58, Paddy McCarthy wrote:
 >> Explicit' keyword! May be, python also have such a feature, I just
 >> don't know about it? Alexander, zatv at bk.ru
 PM> Advocates always say Type Checking, but so often it seems like Type
 PM> Constriction. - To hell with it!
 PM> I don't believe I would be more productive by cluttering Python with
 PM> the Type schemes and variable declarations found in languages like
 PM> Pascal, C, Basic, C++ and Java. People have said that there may be a
 PM> more intelligent way, maybe type inferencing? But no, please, nothing
 PM> like the above, it would just get in the way.
No, I don't even think about compulsory type checking, and so on. I just want
something like this:

var epsilon=0
var S
S=0
while epsilon<10:
  S=S+epsilon
  epselon=epsilon+1#interpreter should show error here,if it's in "strict mode"
print S

It is easy, and clean-looking.

Alexander, zatv at bk.ru


From no at spam.invalid  Mon Feb 28 17:53:43 2005
From: no at spam.invalid (Russell E. Owen)
Date: Mon, 28 Feb 2005 14:53:43 -0800
Subject: How to define a window's position (Tkinter)
References: <1109516700.351898.72850@l41g2000cwc.googlegroups.com>
Message-ID: <d007do$bvp$1@gnus01.u.washington.edu>

In article <1109516700.351898.72850 at l41g2000cwc.googlegroups.com>,
 "Harlin Seritt" <harlinseritt at yahoo.com> wrote:

>I am trying to use the geometry() method with the toplevel window
>called root. I know that one can do the following:
>
>root.geometry('400x400+200+200')
>
>This will put the window in 200, 200 position with a size of 400x400.
>Now, I don't really want to set the size. I simply want to set the
>position of the window. I've tried this:
>
>root.geometry('200+200')
>
>However, this doesn't seem to work. What can I do to set the position
>of the window without actually setting the size?

You were almost there, but you need an initial "+":
root.geometry("+200+200").

-- Russell


From kartic.krishnamurthy at gmail.com  Wed Feb 16 16:54:48 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 16 Feb 2005 13:54:48 -0800
Subject: Using 'in' with a Dict
In-Reply-To: <1108590222.589358.7310@o13g2000cwo.googlegroups.com>
References: <1108590222.589358.7310@o13g2000cwo.googlegroups.com>
Message-ID: <1108590888.319501.117330@g14g2000cwa.googlegroups.com>

This is what I did ....

>>> import compiler
>>> exec1 = compiler.compile('''if "foo" in m:  print "sweet"''', '',
'exec')
>>> exec2 = compiler.compile('''if m.has_key("foo"):  print "dude"''',
'', 'exec')
>>> exec1.co_code
'd\x01\x00e\x00\x00j\x06\x00o\t\x00\x01d\x02\x00GHn\x01\x00\x01d\x00\x00S'
>>> exec2.co_code
'e\x00\x00i\x01\x00d\x01\x00\x83\x01\x00o\t\x00\x01d\x02\x00GHn\x01\x00\x01d\x00\x00S'
>>> exec2 = compiler.compile('''if m.has_key("foo"):  print "sweet"''',
'', 'exec')
>>> exec2.co_code
'e\x00\x00i\x01\x00d\x01\x00\x83\x01\x00o\t\x00\x01d\x02\x00GHn\x01\x00\x01d\x00\x00S'
>>> exec(exec2)
sweet
>>> exec(exec1)
sweet
>>> exec1.co_varnames
('m',)
>>> exec2.co_varnames
('m', 'has_key')
>>>

The code generated with the has_key() version is slightly large (3
bytes) than the one with the membership test. The co_varnames for the
two code objects vary, as the second one has the has_key method also,
which the other version does not.

Thanks,
-Kartic



From http  Wed Feb  2 02:35:46 2005
From: http (Paul Rubin)
Date: 01 Feb 2005 23:35:46 -0800
Subject: how to separate hexadecimal
References: <2cad209005020123107fb43105@mail.gmail.com>
	<mailman.1735.1107329095.22381.python-list@python.org>
Message-ID: <7xy8e7fm7h.fsf@ruckus.brouhaha.com>

jrlen balane <nbbalane at gmail.com> writes:
> ex. hexa = '0x87BE"  # what i want to do is:
>       a = 0x87, b = 0xBE    # so that i could do this:
>       c = a + b            #which should be equal to 0x145

Assuming you really want hexa to begin with the characters '0x', the
string slicing way is:

    a, b = hexa[2:4], hexa[4:6]   # a = '87', b = 'BE'
    c = int(a,16) + int(b, 16)

A more direct arithmetic way is:

   x = int(hexa, 16)     # x = the integer 0x87be
   c = (x >> 8) + (x & 0xff)


From steven.bethard at gmail.com  Tue Feb 15 17:01:10 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 15 Feb 2005 15:01:10 -0700
Subject: Can __new__ prevent __init__ from being called?
In-Reply-To: <87is4tldea.fsf@news2.ososo.de>
References: <87is4tldea.fsf@news2.ososo.de>
Message-ID: <3LOdncHRa6C77I_fRVn-rA@comcast.com>

Felix Wiemann wrote:
> Sometimes (but not always) the __new__ method of one of my classes
> returns an *existing* instance of the class.  However, when it does
> that, the __init__ method of the existing instance is called
> nonetheless, so that the instance is initialized a second time.
>
[snip]
> 
> How can I prevent __init__ from being called on the already-initialized
> object?

The short answer: you can't:
     http://www.python.org/2.2.3/descrintro.html#__new__
Note that in the Singleton example there, subclasses are told to 
override init, not __init__ for exactly this reason.

If it's okay that __init__ never be called, you could do something like:

py> class C(object):
...     class __metaclass__(type):
...         def __call__(cls, *args, **kwargs):
...             return cls.__new__(cls, *args, **kwargs)
...     instance = None
...     def __new__(cls):
...         if cls.instance is None:
...             print 'Creating instance'
...             cls.instance = object.__new__(cls)
...             print 'Created'
...         return cls.instance
...     def __init__(self):
...         print 'In init'
...
py> C()
Creating instance
Created
<__main__.C object at 0x011F2E30>
py> C()
<__main__.C object at 0x011F2E30>

If __init__ needs to be called, I might go with something like:

py> class C(object):
...     class __metaclass__(type):
...         def __call__(cls, *args, **kwargs):
...             if cls.instance is None:
...                 print 'Creating instance'
...                 cls.instance = cls.__new__(cls, *args, **kwargs)
...                 print 'Created'
...                 cls.instance.__init__(*args, **kwargs)
...             return cls.instance
...     instance = None
...     def __init__(self):
...         print 'In init'
...
py> C()
Creating instance
Created
In init
<__main__.C object at 0x011F2E50>
py> C()
<__main__.C object at 0x011F2E50>

where all the work is done in the metaclass and you don't even define 
__new__.  I would probably also create the 'instance' attribute as part 
of the metaclass work, like:

py> class SingletonMetaclass(type):
...     def __call__(cls, *args, **kwargs):
...         try:
...             return cls.__instance__
...         except AttributeError:
...             cls.__instance__ = cls.__new__(cls, *args, **kwargs)
...             cls.__instance__.__init__(*args, **kwargs)
...             return cls.__instance__
...
py> class C(object):
...     __metaclass__ = SingletonMetaclass
...     def __init__(self):
...         print '__init__'
...
py> C()
__init__
<__main__.C object at 0x011F3210>
py> C()
<__main__.C object at 0x011F3210>
py> C() is C()
True

But none of these solutions is particularly simple...  Sorry!

STeVe


From john at grulic.org.ar  Thu Feb 17 12:24:38 2005
From: john at grulic.org.ar (John Lenton)
Date: Thu, 17 Feb 2005 14:24:38 -0300
Subject: low-end persistence strategies?
In-Reply-To: <1108629775.800508.3400@f14g2000cwb.googlegroups.com>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<mailman.2735.1108616299.22381.python-list@python.org>
	<1108622622.119311.43200@f14g2000cwb.googlegroups.com>
	<mailman.2746.1108629315.22381.python-list@python.org>
	<1108629775.800508.3400@f14g2000cwb.googlegroups.com>
Message-ID: <20050217172438.GC2366@grulic.org.ar>

On Thu, Feb 17, 2005 at 12:42:55AM -0800, Michele Simionato wrote:
> John Lenton:
> > the operating system cleans up the lock.
> 
> So, are you effectively saying than a custom made solution based on
> flock can be quite reliable and it could be a reasonable choice to
> use shelve+flock for small/hobbysts sites? I always thought locking
> was a bad beast and feared to implement it myself, but maybe I was
> wrong afterall ...

locking works very well, when it works. If you're on Linux, the
manpage for flock has a NOTES section you should read. I don't know
how direct the mapping between python's flock/lockf and the OSs
flock/lockf are, you might want to look into that as well (but you'd
only really care if you are in one of the corner cases mentioned in
the referred NOTES section).

In some weird corner cases you'd have to revert to some other locking
scheme, but the same pattern applies, however: subclass whatever it is
you want to use, wrapping the appropriate methods in try/finally
lock/unlocks; you just want to change the flock to some other thing.

Also, if you use something where the process doesn't terminate between
calls (such as mod_python, I guess), you have to be sure to write the
try/finallys around your locking code, because the OS only cleans up
the lock when the process exits.

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
Keep emotionally active.  Cater to your favorite neurosis.
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From exogen at gmail.com  Fri Feb 18 20:10:57 2005
From: exogen at gmail.com (Brian Beck)
Date: Fri, 18 Feb 2005 20:10:57 -0500
Subject: [perl-python] exercise: partition a list by equivalence
In-Reply-To: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
Message-ID: <cv63sg$11k$1@eeyore.INS.cwru.edu>

Xah Lee wrote:
> merge($pairings) takes a list of pairs, each pair indicates the
> sameness
> of the two indexes. Returns a partitioned list of same indexes.
> 
> For example, if the input is
> merge( [ [1,2], [2,4], [5,6] ] );
> 
> that means 1 and 2 are the same. 2 and 4 are the same. Therefore
> 1==2==4. The result returned is
> 
> [[4,2,1],[6,5]];

Not sure how efficient this is, but I decided to take advantage of the 
operations provided by sets:

def merge(pairs):
     pairs = set(tuple(sorted(p)) for p in pairings)
     merged = []
     # Each loop will result in a new, complete sublist in the result.
     while pairs:
         p = set(pairings.pop())
         remove = set([])
         for pair in pairs:
             pairSet = set(pair)
             if pairSet & p:
                 p |= pairSet
                 remove.add(pair)
         pairs -= remove
         merged.append(list(p))
     return merged

--
Brian Beck
Adventurer of the First Order


From steven.bethard at gmail.com  Sun Feb 20 15:13:22 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 20 Feb 2005 13:13:22 -0700
Subject: How to wrap a class's methods?
In-Reply-To: <4218924D.6060704@athop1.ath.vt.edu>
References: <4214f167$0$44618$a1866201@visi.com>
	<Hv-dnZ4dh7oHa4nfRVn-qA@comcast.com>
	<111a08n16gu9bb0@corp.supernews.com>
	<4218924D.6060704@athop1.ath.vt.edu>
Message-ID: <-5udncZsw_bCcoXfRVn-og@comcast.com>

rbt wrote:
> Jeff Shannon wrote:
> 
>> You could probably also do this as a factory function, rather than as 
>> a class (also untested!):
>>
>> def Wrapper(func):
>>     def wrapped(self, *args, **kwargs):
>>         s, r = func(self, *args, **kwargs)
>>         if s != 'OK':
>>             raise NotOK((s,r))
>>         return r
>>     return wrapped
>>
>> I believe that this will be semantically almost equivalent, but 
>> conceptually slightly simpler.
>>
>> Jeff Shannon
> 
> This is a nice example. I have used sub-functions (functions within 
> functions) recently with some code, but I've wondered how proper it is 
> to do this. Is this type of thing frowned upon?

Nope.  If it was frowned upon, Python wouldn't support it. ;)  Sometimes 
it's even faster:

-------------------- test.py --------------------
def wrapper(func):
     def wrapped(*args, **kwargs):
         return bool(func(*args, **kwargs))
     return wrapped

class Wrapper(object):
     def __init__(self, func):
         self.func = func
     def __call__(self, *args, **kwargs):
         return bool(self.func(*args, **kwargs))
-------------------------------------------------

$ python -m timeit -s "import test; w = test.wrapper(sum)" "w([]); w([1,2])"
100000 loops, best of 3: 4.77 usec per loop

$ python -m timeit -s "import test; w = test.Wrapper(sum)" "w([]); w([1,2])"
100000 loops, best of 3: 6.52 usec per loop

Personally, I still tend towards the class-based version, but I'm sure 
in many cases the nested function version would work just as well.

STeVe


From cam.ac.uk at mh391.invalid  Sun Feb 20 18:13:32 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sun, 20 Feb 2005 23:13:32 +0000
Subject: [ANN] Python 2.4 Quick Reference available
In-Reply-To: <mailman.2871.1108925059.22381.python-list@python.org>
References: <cv79sj$mgk$1@aphrodite.grec.isp.9tel.net>	<1108831318.290846.5930@z14g2000cwz.googlegroups.com>	<qnkll9kv09y.fsf@arbutus.physics.mcmaster.ca>	<37qaleF5gd7bcU1@individual.net>
	<421898CD.6040408@iinet.net.au>	<mailman.2863.1108909421.22381.python-list@python.org>	<cva8gd$3v7$1@gemini.csx.cam.ac.uk>
	<mailman.2871.1108925059.22381.python-list@python.org>
Message-ID: <cvb5j0$26q$1@gemini.csx.cam.ac.uk>

Fran?ois Pinard wrote:
> [Michael Hoffman]
> 
>>To be honest I doubt open will be extended in this manner.
> 
> I did not read Guido's arguments for a while, so I may remember them
> wrongly.

No, I think you remember them the same way I do.

> So, take me with a grain of salt.  I would not think Guido is
> arguing for the sole sake of arguing.  Maybe his plans or visions will
> change, but until such changes are announced, I've no reason to doubt
> them :-).

Well I'd hope they would. :)

> All in all, `file' is now probably to be considered safer than
> `open', despite Guido advises to prefer `open'.

Definitely. :)
-- 
Michael Hoffman


From jgrahn-nntq at algonet.se  Sat Feb  5 12:53:28 2005
From: jgrahn-nntq at algonet.se (Jorgen Grahn)
Date: 5 Feb 2005 17:53:28 GMT
Subject: Trouble converting hex to decimal?
References: <mailman.1968.1107611497.22381.python-list@python.org>
Message-ID: <slrnd0a1tk.rr5.jgrahn-nntq@frailea.sa.invalid>

On Sat, 05 Feb 2005 06:51:32 -0700, Earl Eiland <eee at nmt.edu> wrote:
> I'm trying to process the IP packet length field, as recorded by pcap
> (Ethereal) and recovered using pcapy.  When I slice out those bytes, I
> get a value that shows in '\x00' format, rather than '0x00'.  Neither
> int() nor eval() are working.  How do I handle this?

>From my unpublished protocol analyzing hack:

class Ip:
    "IPv4 header"
    def __init__(self, frame):
        (vi, tos, tlen,
         id, ffoff,
         ttl, proto, checksum,
         source,
         dest) = struct.unpack('! BBH HH BBH LL', frame[:20])
        self.len = 4 * (vi & 0xf)
        if proto==6:
            self.proto=Tcp
        elif proto==17:
            self.proto=Udp
        elif proto==1:
            self.proto=Icmp
        self.source = Address(source)
        self.dest = Address(dest)

That doesn't take IP options into account (or are they part of Ip.len? I
forget.), but it has the nifty feature that IP.proto tells the caller what
factory function (if any) she should feed the rest of the frame into.

/Jorgen

-- 
  // Jorgen Grahn <jgrahn@       Ph'nglui mglw'nafh Cthulhu
\X/                algonet.se>   R'lyeh wgah'nagl fhtagn!


From ksenia.marasanova at gmail.com  Fri Feb 18 15:28:24 2005
From: ksenia.marasanova at gmail.com (Ksenia Marasanova)
Date: Fri, 18 Feb 2005 22:28:24 +0200
Subject: extracting HTML fragments and counting words
Message-ID: <130df19305021812282bffb8bc@mail.gmail.com>

Hi,

I want to show preview  of several HTML formatted newsitems on one
page, preserving markup (and images) intact, but showing not more
thatn X first _readable_ words of every page. Is anyone aware of some
Python library that makes programming this easy? I already started to
program it with Beautiful Soup, but maybe there is a more easy way...

Thanks!
-- 
Ksenia


From sjmachin at lexicon.net  Thu Feb 24 17:57:57 2005
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 25 Feb 2005 09:57:57 +1100
Subject: Canonical way of dealing with null-separated lines?
References: <lcll9efw8l.fsf@gaffa.mit.edu>
	<mailman.3006.1109264015.22381.python-list@python.org>
	<5aes11d4da95un1n78vtb04m43269hqo4m@4ax.com>
	<mailman.3020.1109281886.22381.python-list@python.org>
Message-ID: <73ms1190hrldde9ql8bc659igro3eqd9lf@4ax.com>

On Thu, 24 Feb 2005 16:51:22 -0500, Christopher De Vries
<devries at idolstarastronomer.com> wrote:

[snip]

>I think this is a definite improvement... especially putting the buffer size
>and line terminators as optional arguments, and handling empty files. I think,
>however that the if splitstr[-1]: ... else: ... clauses aren't necessary,

Indeed. Any efficiency gain would be negated by the if test and it's
only once per buffer-full anyway. I left all that stuff in to show
that I had actually analyzed the four cases i.e. it wasn't arrived at
by lucky accident.

> so I
>would probably reduce it to this:
>
[snip]
>
>Popping off that last member and then iterating over the rest of the list as
>you suggested is so much more efficient, and it looks a lot better. 

Yeah. If it looks like a warthog, it is a warthog. The converse is of
course not true; examples of elegant insufficiency abound.

Cheers,
John



From abkhd at earth.co.jp  Sat Feb 12 01:25:00 2005
From: abkhd at earth.co.jp (A.B., Khalid)
Date: 11 Feb 2005 22:25:00 -0800
Subject: ANN: pyMinGW support for Python 2.3.5 (final) is available
Message-ID: <1108189500.707806.316520@g14g2000cwa.googlegroups.com>

This is to inform those interested in compiling Python in MinGW that
an updated version of pyMinGW is now available.


Get it from here:
http://jove.prohosting.com/iwave/ipython/pyMinGW.html


Regards
Khalid



From fredrik at pythonware.com  Tue Feb  8 06:22:39 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 12:22:39 +0100
Subject: Choosing the right parser for parsing C headers
References: <1107861023.254610.14310@g14g2000cwa.googlegroups.com>
Message-ID: <cua7bc$shm$1@sea.gmane.org>

Jean de Largentaye wrote:

> I need to parse a subset of C (a header file), and generate some unit
> tests for the functions listed in it. I thus need to parse the code,
> then rewrite function calls with wrong parameters. What I call "shaking
> the broken tree" :)
>
> I chose to make my UT-generator in Python 2.4. However, I am now
> encountering problems in choosing the right parser for the job. I
> struggle in choosing between the inappropriate, the out-of-date, the
> alpha, or the too-big-for-the task...

why not use a real compiler?

    http://www.boost.org/libs/python/pyste/
    http://www.gccxml.org/HTML/Index.html

</F> 





From ggrp1.20.martineau at dfgh.net  Mon Feb 21 14:00:15 2005
From: ggrp1.20.martineau at dfgh.net (Martin Miller)
Date: 21 Feb 2005 11:00:15 -0800
Subject: Test for structure
References: <1108566497.848623.45360@c13g2000cwb.googlegroups.com>
	<mailman.2824.1108792560.22381.python-list@python.org>
	<1108937287.079367.276910@g14g2000cwa.googlegroups.com>
	<HIqdnYQVyeBCjYTfRVn-oQ@comcast.com>
Message-ID: <1109012415.692798.185750@l41g2000cwc.googlegroups.com>

Testing for the '__iter__' (or even '__getitem__') attribute doesn't
really address the problem, nor does trying to execute the statement
'itr = iter(a)'.

To use EAPF and answer the OP's original question, which was

> So how can I test if a variable 'a' is either a single character
> string or a list?

I think the best answer would be to use Robin Munn's suggestion (see
http://groups-beta.google.com/group/comp.lang.python/msg/c8befd4bed517bbc)
as mentioned in the link in Simon Brunning's post) namely:

    try:
        a + ''
    except TypeError:
        pass
    else:
        a = [a]

However, to handle the more general problem of allow *any* argument to
be either a single item or a list seems to require a combination of
both EAPF and LBYL. This is the best solution I've been able to come up
with so far:

def asList(arg):
    """Makes sure the argument it is passed is a Python list.
    If it is, it is just returned, otherwise a (possibly empty)
    list is created and returned with the single item in it.

    asList() can used to create flexible interfaces which allow
    arguments to be passed to them that are either single items or
    lists of items. By applying this function before using the
    values in arguments, single and multi-valued cases can be
    handled by general list-handling code in the function or
    method.

    As a special case, a single argument with the value None is
    converted into an empty list (instead of converted into the
    list [None]).

    asList(arg) ==> list
    """

    if arg is None:
        return []
    elif isinstance(arg, basestring): # special case strings (to
                                      # avoid list(<string>))
        return [arg]
    else:
        try:
            return list(arg)
        except TypeError:
            return [arg]


if __name__ == "__main__":

    def example(items=None):
        """Sample function that can be called with a single argument
        that can be a single or list of items.
        """
        itemList = asList(items)
        if not itemList:
            print "example() called with empty list or None argument"
        else:
            print "example() called with argument containing %d " \
                  "thing%s" % \
                  (len(itemList), ('','s')[len(itemList)>1])
        for i, item in enumerate(itemList):
            print "  items[%d] = %s" % (i, repr(item))

    example(42)
    example((1,2,3))
    example([4,5,6,7])
    example('abc')
    example(u'def')
    example(["aaa", 111, (4,5), 2.01])
    example(None) #  Note that this will become an empty list
    example()     #  same in this case

Which produces the following output:

example() called with argument containing 1 thing
  items[0] = 42
example() called with argument containing 3 things
  items[0] = 1
  items[1] = 2
  items[2] = 3
example() called with argument containing 4 things
  items[0] = 4
  items[1] = 5
  items[2] = 6
  items[3] = 7
example() called with argument containing 1 thing
  items[0] = 'abc'
example() called with argument containing 1 thing
  items[0] = u'def'
example() called with argument containing 4 things
  items[0] = 'aaa'
  items[1] = 111
  items[2] = (4, 5)
  items[3] = 2.0099999999999998
example() called with empty list or None argument
example() called with empty list or None argument

Can this be improved or is there anything wrong or overly limiting
about it?

TIA,
Martin


=====================
Steven Bethard wrote:
> Terry Hancock wrote:
>  > But you probably shouldn't do that. You should probably just test
to
>  > see if the object is iterable --- does it have an __iter__ method?
>  >
>  > Which might look like this:
>  >
>  > if hasattr(a, '__iter__'):
>  >     print "'a' quacks like a duck"
>
> Martin Miller top-posted:
> > I don't believe you can use the test for a __iter__ attribute in
this
> > case, for the following reason:
> >
> >>>>c1 = 'abc'
> >>>>c2 = ['de', 'fgh', 'ijkl']
> >>>>hasattr(c1, '__iter__')
> > False
> >
> >>>>hasattr(c2, '__iter__')
> > True
>
> Right.  str and unicode objects support iteration through the old
> __getitem__ protocol, not the __iter__ protocol.  If you want to use
> something as an iterable, just use it and catch the exception:
>
> try:
>      itr = iter(a)
> except TypeError:
>      # 'a' is not iterable
> else:
>      # 'a' is iterable
>
> Another lesson in why EAPF is often better than LBYL in Python[1].
> 
> STeVe
> 
> [1] http://www.python.org/moin/PythonGlossary



From raghulj at gmail.com  Sun Feb 27 23:24:23 2005
From: raghulj at gmail.com (Raghul)
Date: 27 Feb 2005 20:24:23 -0800
Subject: closing tabs in wxpython
Message-ID: <1109564663.573537.246800@z14g2000cwz.googlegroups.com>

hi,
  Can anybody help in closing tabs in wxpython.Pls give me a sample
program for explaining this.Thanx in advance



From removethis.kartic.krishnamurthy at gmail.com  Sun Feb  6 09:26:37 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Sun, 06 Feb 2005 14:26:37 GMT
Subject: Python versus Perl ?
In-Reply-To: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
Message-ID: <xOpNd.31333$MX2.17074@twister.nyroc.rr.com>

surfunbear at yahoo.com said the following on 2/6/2005 8:19 AM:
>  I've read some posts on Perl versus Python and studied a bit of my
> Python book.
> 
>  I'm a software engineer, familiar with C++ objected oriented
> development, but have been using Perl because it is great for pattern
> matching, text processing, and automated testing. Our company is really
> fixated on risk managnemt and the only way I can do enough testing
> without working overtime (which some people have ended up doing) is by
> automating my testing. That's what got me started on Perl.

Python is great for pattern matching using the re module. If you are 
talking about the ~= operator, that is not available in Python but you 
can your favorite Regexp matches/searches/replacements using the re 
module. And actually I like Python re sub better as it has a clean 
syntax. One can provide a replacement function to the sub method where 
one can manipulate the matched groups. Please see 
http://www.amk.ca/python/howto/regex/ for more info.

Automated testing - One of the best languages to create automated test 
cases and still remember after a few months what your test cases... that 
is how clean Python syntax is. And you have not specified exactly what 
kind of automation you do. I code test cases for Win32 as well as 
testing data exchange over FTP and Telnet.

I know a lot of toy and serious parsers written in Python. Heck, there 
is even a Python implementation in Python. Text Processing is simply 
superb, combined the the re module. I am not too qualified to talk about 
text processing but lets say life is a breeze! You can read about Python 
Text Processing at http://gnosis.cx/TPiP/ - this is a whole book 
dedicated to text processing in Python. Also see 
http://www.python.org/moin/LanguageParsing


> 1. Perl seems to have alot of packaged utilities available through
> CPAN, the comprehensive perl network. These can aid in building
> parsers, web development, perl DBI is heavily used. This seems to be a
> very important benifit. I'm not sure that Python is as extenive at all
> in that regard ? Perl also has excellent pattern matching compared to
> sed, not sure about how Python measures up,
>  but this seems to make perl ideally suited to text processing.

While, AFAIK, there is no CPANish library, Python comes with "batteries" 
included, i.e., almost everything you would need to churn out the 
programs you need. For everything else, there are independent projects. 
But take a look at the Vault of Parnassus for a BIG collection of Python 
modules/projects/applications.

Python has a DBI compliant API which means all compliant modules support 
the same syntax. And Python has modules supports all major databases. 
See http://www.python.org/topics/database/

> 2. Python is apparantly better at object oriented. Perl has some kind
> of name spacing, I have used that in a limited way. Does Perl use a
> cheap and less than optimal Object oriented approach ?
> That was what someone at work said, he advocates Python.
> Is it likely that Perl will improve it's object oriented features
> in the next few years ?

Well, Perl's lack of a decent OO approach is one reason I converted to 
Python. Another was Perl's syntax; I could not read my own code unless I 
had put copious amounts of comments. Python enforces clean coding using 
indentation levels that associates blocks of code; so no need of a {} or 
BEGIN/END and you will be amazed at how indentation, which IMHO, any 
programmer should anyway practice for readability, can make the code 
easy to comprehend.

> 3. Perl is installed on our system and alot of other systems.
> You don't have to make sys admins go out of there way to make it


That actually depends on the OS. I believe Sun OS comes with Perl and 
that is because of the historic use of Perl for sys admin work. Redhat 8 
onwards comes with Python installed because Redhat's install process is 
written in Python. Windows comes with neither. And for your sysadmins, 
installing Python should not be difficult at all. As long as you 
identify the need and tell them that is what they must do for your 
accomplish your tasks efficiently, I don't see this a stumbling block at 
all!

 > available. It's usually allready there. I also did a search of job
 > postings on a popular website. 108 jobs where listed that require
 > knowledge of Perl, only 17 listed required Python. Becomeing more
 > familiar with Perl might then be usefull for ones resume ?

I don't see the correlation between the number of jobs available and 
fashion-statement of a language, if that is what you are insinuating. My 
job does not require me to know Python, but I use it and effectively. 
So, how does one account for that? And since you already have a job and 
are considering using Python for your current job, it should not matter 
to you. Moreover you increase your marketability by learning both Perl 
and Python...you have access to 108 + 17 jobs :-)

True, there are a few Python "shops" but there are many jobs that ask 
for knowledge of Python, especially testing positions. The few Python 
shops are places you will die to work for - like Google may be?

Other aspects that support adoption of Python are consistent syntax, 
great OO, code maintainability and short development time (proportional 
to the complexity of the design).

Good that you asked this question as part of due diligence. These are 
the factors I can point out. If I have missed something or misquoted, 
gurus out there can correct me.

Hope that helped!
-Kartic


From easeway.hu at sap.com  Mon Feb 28 22:42:53 2005
From: easeway.hu at sap.com (Easeway)
Date: Tue, 01 Mar 2005 11:42:53 +0800
Subject: java crashes in python thread
Message-ID: <pan.2005.03.01.03.42.51.837693@sap.com>

I use os.system invoking java VM, when running in python thread, 
the java application crashes.  But it works properly when thread is
not used.

Has any body come across with this problem?

Python 2.3.3
J2SDK 1.4.2_05
SuSE Linux Enterprise Server 9

The following is source file:
#!/usr/bin/env python

import os, sys, threading

class ThreadTask(threading.Thread) :

    def __init__(self, shellcmd) :
        threading.Thread.__init__(self)
        self.command = shellcmd

    def isStopped(self) :
        self.join(0.01)
        return not self.isAlive()

    def run(self) :
        os.system(self.command)
    
def test() :
    commands = [
                    "/usr/lib/java/bin/javac",
                    "/usr/lib/java/bin/java",
               ]
    tasks = []    
    for a in commands :
        tasks.append(ThreadTask(a))
    
    for a in tasks :
        a.start()
        
    endcnt = 0
    while endcnt < len(tasks) :
        endcnt = 0
        for a in tasks :
            if a.isStopped() : endcnt += 1
    print("DONE")

test()



From as006d4848 at blueyonder.co.uk  Thu Feb 10 08:51:21 2005
From: as006d4848 at blueyonder.co.uk (Philip Smith)
Date: Thu, 10 Feb 2005 13:51:21 GMT
Subject: lambda and for that matter goto not forgetting sugar
Message-ID: <tFJOd.38794$68.10179@fe1.news.blueyonder.co.uk>

I've read with interest the continuing debate about 'lambda' and its place 
in Python.

Just to say that personally I think its an elegant and useful construct for 
many types of programming task (particularly number theory/artificial 
intelligence/genetic algorithms)

I can't think why anyone would be proposing to do away with it.  Sometimes 
an anonymous function is just what you need and surely it just reflects the 
python philosophy of everything being an object (in this case a code 
object).

Mind you my particular programming interest is algorithmic programming, I 
have no idea whether Lambda is of any relevance to eg client server 
programming.

For that matter I would find implementing the classical algorithms far 
easier if python had 'goto' (I'll wait for the guffaws to subside before 
mentioning that no lesser guru than Donald Knuth writes his algorithms that 
way - naturally so because it reflects what the machine does at the base 
level).  Please don't suggest using try/except as an alternative as the 
ugliness and inappropriateness of that to achieve a simple 'goto' is utterly 
out of keeping with the 'cleanliness' which is Python's most appealing 
feature.

(And yes - I do like spaghetti but only to eat, not in my code).

Following on naturally from that last point I would also like to 'deprecate' 
the use of the expression 'syntactic sugar' on these pages.  All high level 
languages (Python included) are nothing but syntactic sugar designed to 
conceal the ugliness of what actually gets sent to the CPU to make it all 
happen.

On a positive note though - I have found this newsgroup an invaluable aid to 
learning Python over the last few weeks and the response to queries has been 
as quick as it has been informative.

I've decided I like Python - in fact I think of it more as syntactic maple 
syrup than sugar.

Competition:  Has anyone found anything you can't do in the language?

regards to all

Phil 




From ncoghlan at iinet.net.au  Sat Feb 12 22:49:30 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 13 Feb 2005 13:49:30 +1000
Subject: For American numbers
In-Reply-To: <420e7376$1@nntp0.pdx.net>
References: <420e7376$1@nntp0.pdx.net>
Message-ID: <420ECE4A.5000705@iinet.net.au>

Scott David Daniels wrote:
> Kind of fun exercise (no good for British English).
> 
>     def units(value, units='bytes'):
>         magnitude = abs(value)
>         if magnitude >= 1000:
>             for prefix in :
>                 magnitude /= 1000.
>                 if magnitude < 1000.:
>                     break
>         elif magnitude < 1:
>             for prefix in :
>                 magnitude *= 1000.
>                 if magnitude >= 1.0:
>                     break
>             if magnitude < .001:
>                 return 'zero %s' % units
>         else:
>             prefix = ''
>         if value < 0:
>             return '-%.3f %s%s' % (magnitude, prefix, units)
>         return '%.3f %s%s' % (magnitude, prefix, units)
> 
> --Scott David Daniels
> Scott.Daniels at Acm.Org
> 

Because I can't resist generalising this. . .

def units(value, units='bytes', base=1000.0,
           super_prefixes = ('kilo mega giga tera peta ' 

                             'exa zetta yotta').split(),
           sub_prefixes = ('milli micro nano pico femto '
                           'atto zepto yocto').split()):
     magnitude = abs(value)
     if magnitude >= base:
         for prefix in super_prefixes:
             magnitude /= base
             if magnitude < base:
                 break
     elif magnitude < 1.0:
         for prefix in sub_prefixes:
             magnitude *= base
             if magnitude >= 1.0:
                 break
         if not sub_prefixes or magnitude < .001:
             return 'zero %s' % units
     else:
         prefix = ''
     if value < 0:
         return '-%.3f %s%s' % (magnitude, prefix, units)
     return '%.3f %s%s' % (magnitude, prefix, units)

def bytecount(value):
     # Should check if these prefixes are right. . .
     return units(value, 'bytes', 1024.0,
            'kibi mebi gibi tebi pebi ebi zebi yobi'.split(), [])

Py> for i in range(1, 28, 3):
...     print units(10**i)
...     print bytecount(10**i)
...
10.000 bytes
10.000 bytes
10.000 kilobytes
9.766 kibibytes
10.000 megabytes
9.537 mebibytes
10.000 gigabytes
9.313 gibibytes
10.000 terabytes
9.095 tebibytes
10.000 petabytes
8.882 pebibytes
10.000 exabytes
8.674 ebibytes
10.000 zettabytes
8.470 zebibytes
10.000 yottabytes
8.272 yobibytes

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From aurora00 at gmail.com  Thu Feb  3 22:17:06 2005
From: aurora00 at gmail.com (aurora)
Date: Thu, 03 Feb 2005 19:17:06 -0800
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
Message-ID: <opslnkqsjo6yt6e7@news.cisco.com>

Slow compares to what? For a large commerical site with bigger budget,  
better infrastructure, better implementation, it is not surprising that  
they come out ahead compares to hobbyist sites.

Putting implementation aside, is LAMP inherently performing worst than  
commerical alternatives like IIS, ColdFusion, Sun ONE or DB2? Sounds like  
that's your perposition.

I don't know if there is any number to support this perposition. Note that  
many largest site have open source components in them. Google, Amazon,  
Yahoo all run on unix variants. Ebay is the notable exception, which uses  
IIS. Can you really say ebay is performing better that amazon (or vice  
versa)?

I think the chief factor that a site performing poorly is in the  
implementation. It is really easy to throw big money into expensive  
software and hardware and come out with a performance dog. Google's  
infrastructure relies on a large distributed network of commodity  
hardware, not a few expensive boxes. LAMP based infrastructure, if used  
right, can support the most demanding applications.



> LAMP = Linux/Apache/MySQL/P{ython,erl,HP}.  Refers to the general
> class of database-backed web sites built using those components.  This
> being c.l.py, if you want, you can limit your interest to the case the
> P stands for Python.
>
> I notice that lots of the medium-largish sites (from hobbyist BBS's to
> sites like Slashdot, Wikipedia, etc.)  built using this approach are
> painfully slow even using seriously powerful server hardware.  Yet
> compared to a really large site like Ebay or Hotmail (to say nothing
> of Google), the traffic levels on those sites is just chickenfeed.
>
> I wonder what the webheads here see as the bottlenecks.  Is it the
> application code?  Disk bandwidth at the database side, that could be
> cured with more ram caches or solid state disks?  SQL just inherently
> slow?
>
> I've only worked on one serious site of this type and it was "SAJO"
> (Solaris Apache Java Oracle) rather than LAMP, but the concepts are
> the same.  I just feel like something bogus has to be going on.  I
> think even sites like Slashdot handle fewer TPS than a 1960's airline
> reservation that ran on hardware with a fraction of the power of one
> of today's laptops.
>
> How would you go about building such a site?  Is LAMP really the right
> approach?



From ajikoe at gmail.com  Fri Feb  4 12:08:48 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 4 Feb 2005 09:08:48 -0800
Subject: dynamic func. call
In-Reply-To: <ctvrdk$evf$1@bagan.srce.hr>
References: <ctvrdk$evf$1@bagan.srce.hr>
Message-ID: <1107536928.150898.114000@o13g2000cwo.googlegroups.com>

Try this:

def myfunc():
  print "helo"

s = "myfunc()"
a = eval(s)



From chromeclouds at yahoo.co.uk  Fri Feb 25 18:51:05 2005
From: chromeclouds at yahoo.co.uk (Mark)
Date: 25 Feb 2005 15:51:05 -0800
Subject: Yet another logo design...
Message-ID: <6c9897c2.0502251551.2b8feb@posting.google.com>

Hi, I'm relatively new to python and have been reading some of the
topics on the Python logo and marketing issues etc. Long story short
here is a contemporary logo design by myself:

http://www.imagezilla.com/img.php?im=1182129642_logo.png

Any comments welcome...

*runs*


From x at y.z  Tue Feb 15 00:58:20 2005
From: x at y.z (D H)
Date: Mon, 14 Feb 2005 23:58:20 -0600
Subject: wxPython OGL future
In-Reply-To: <1108444794.127721.326970@f14g2000cwb.googlegroups.com>
References: <1108428501.441786.154130@g14g2000cwa.googlegroups.com>
	<aP-dnUwXT5aB7ozfRVn-ug@powergate.ca>
	<1108444794.127721.326970@f14g2000cwb.googlegroups.com>
Message-ID: <j-udnax-2JAdEozfRVn-1g@comcast.com>

PD wrote:
> I don't think I want that much out of it necessarily. I just feel
> really weird writing new software with deprecated libraries. By the
> time Im done with my project, I have to put all these disclaimers on
> how the new versions of wxWidgets might not work. The thing I am really
> concerened about is if wxPython decides to drop OGL because it is
> deprecated... anyhow thats my 2 cents.

Actually, I think the information on the wxpython wiki is now out of 
date.  OGL was implemented in C and wxpython provided a wrapper.  That 
version is now dead.  But they rewrote OGL in pure python.  So it isn't 
obsolete yet I believe.  Since it is written in python you can easily 
extend it or whatever.

Instead of saying "import wx.ogl as ogl", say
"import wx.lib.ogl as ogl".


From miki.tebeka at Zoran.com  Tue Feb 22 07:55:14 2005
From: miki.tebeka at Zoran.com (Miki Tebeka)
Date: Tue, 22 Feb 2005 14:55:14 +0200
Subject: which parser to use
In-Reply-To: <87ll9hmdd6.fsf@subopt.house-net>
References: <87ll9hmdd6.fsf@subopt.house-net>
Message-ID: <20050222125514.GA4000@zoran.com>

Hello E,

> I'm building something that requires parsing a rather complex
> language. I'd like to do the whole application, including the
> lex/parse phase, in Python (for development/debug speed), and only
> move parts of it to a compiled language if execution speed absolutely
> dictates. So, what i'm looking for in a Python parser is:
> 
>     1) reliability (don't want to debug a parser)
>     1) flexibility (i do a lot of refactoring)
>     2) E/BNF friendliness (working from a spec)
>     3) speed (moderate speed will do; glacial won't)
> 
> Does anyone have any familiarity with some of the several Python
> parsers out there? Any pointers to comparisons (as opposed to surveys)
> of _several_ of the Python parsers would be much appereciated. (I've
> seen the YAPPS/Spark comparison.) If none of the Python parsers really
> fit the bill, any thoughts on ANTLR, Spirit, etc?
I'm very happy with PLY (http://systems.cs.uchicago.edu/ply/).
I was used in several small parsers here and it's easy to maintain, works
in acceptable speed and IMO the code is very readable.
Also I find the documentation very good.

HTH.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys


From ville at spammers.com  Wed Feb  2 04:36:48 2005
From: ville at spammers.com (Ville Vainio)
Date: 02 Feb 2005 11:36:48 +0200
Subject: Python for S60 mentioned in a mainstream Finnish e-news website
Message-ID: <du7wttrb8wf.fsf@lehtori.cc.tut.fi>

http://digitoday.fi/showPage.php?page_id=9&news_id=40179

Literal translation for those who can't read Finnish:

Nokia has published the Open Source Python language for Series 60
based mobile devices. The company states that the language makes it
easy for the wordwide Python community to execute commands and run
scripts and apps in the devices.

The language is available for free from the Nokia developer pages and
can be installed on a S60 device with an installation package.

- Python makes the mobile app devepment easy for the programmers who
  are looking for a rapid and developer friendly way to develop
  mobile applications, says Director Lee Epting from Forum Nokia.

Nokia believes that Python for Series 60 is a good fit for developing
prototype- and proof-of-concept apps. The company characterizes the
language as efficient and relatively easy to learn.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From marian at mba-software.de  Mon Feb  7 01:18:35 2005
From: marian at mba-software.de (=?ISO-8859-1?Q?Marian_Aldenh=F6vel?=)
Date: Mon, 07 Feb 2005 07:18:35 +0100
Subject: pygame.mixer.music not playing
In-Reply-To: <1107753030.904833.179800@z14g2000cwz.googlegroups.com>
References: <36mb0iF54udklU1@individual.net>
	<1107700800.258876.298010@z14g2000cwz.googlegroups.com>
	<36mvjkF54gvnrU1@individual.net>
	<1107748705.808825.319270@f14g2000cwb.googlegroups.com>
	<36o9dvF53a94mU1@individual.net>
	<1107753030.904833.179800@z14g2000cwz.googlegroups.com>
Message-ID: <36ofi4F55jevuU1@individual.net>

Hi,

> Just curious what is not suitable about FMOD?

Nothing. See my other posting. It just took me some time...

Ciao, MM
-- 
Marian Aldenh?vel, Rosenhain 23, 53123 Bonn. +49 228 624013.
http://www.marian-aldenhoevel.de
"Wir brauchen keine Opposition, wir sind bereits Demokraten."


From martin at v.loewis.de  Sun Feb 20 12:38:05 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 20 Feb 2005 18:38:05 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cvafgu$2lk$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>	<42172136$0$27576$9b622d9e@news.freenet.de>	<cv7i57$d0v$1@usenet.otenet.gr>	<42185b05$0$15460$9b622d9e@news.freenet.de>	<cv9sdo$69n$3@usenet.otenet.gr>	<42189527$0$6260$9b622d9e@news.freenet.de>	<cvadcj$mqc$1@usenet.otenet.gr>
	<mailman.2866.1108917759.22381.python-list@python.org>
	<cvafgu$2lk$1@usenet.otenet.gr>
Message-ID: <4218cafe$0$8790$9b622d9e@news.freenet.de>

Ilias Lazaridis wrote:
> Should I take answers serious?
> 
> .
> 
> .
> 
> .
> 
> .
> 
> Answer from people which do not respect coherence of writings?
> 
> -
> -
> -
> 
> I still detect the coherence.
> 
> As most people in this group will detect the coherence.

I don't. The second fragment is not even correct English
(it does not have a verb in the main phrase, and Answer
is lacking an article).
So I have to guess what you could have meant. If you want
to be understood, you might have phrased the question like
this:

"Should I take answers from people which do not respect coherence
of writings serious?"

Or, if this splits the adjective too much from the verb, you
could also write

"Should I take answers serious if they come from people which
do not respect coherence of writings?"

This *still* would not have meant that I had understood the
question, since I still don't know what coherence of
writings is (as you failed to give a definition when I
last asked), but atleast I would have realized that I
don't understand the question, and refrained from answering
it. Perhaps the question was meant rhetoric.

Regards,
Martin


From exogen at gmail.com  Sun Feb 20 17:30:54 2005
From: exogen at gmail.com (Brian Beck)
Date: Sun, 20 Feb 2005 17:30:54 -0500
Subject: Moving to Python from PHP - 3 questions
In-Reply-To: <mailman.2875.1108933444.22381.python-list@python.org>
References: <mailman.2873.1108931203.22381.python-list@python.org>	<cvat62$9h0$05$1@news.t-online.com>
	<mailman.2875.1108933444.22381.python-list@python.org>
Message-ID: <cvb38c$dk0$1@eeyore.INS.cwru.edu>

Maybe this can help you get it working on OS X:
http://thread.gmane.org/gmane.comp.python.mod-python/4039

But as stated in my other post, you may want to take a look at your 
other options first. Web development with Python is really nothing like 
PHP, unless you really want it to be.

--
Brian Beck
Adventurer of the First Order


From tzot at sil-tec.gr  Mon Feb 28 16:43:46 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Mon, 28 Feb 2005 23:43:46 +0200
Subject: string methods (warning, newbie)
References: <A7B5C22F20EE3C4E95744E2F03F1887F380869@MAYOR.retzlaff.com>
	<mailman.3111.1109477697.22381.python-list@python.org>
	<-_KdnbUPBttz8r_fRVn-ow@comcast.com>
Message-ID: <jp27211nihjcc91c1f3sasmphdaoaq2as2@4ax.com>

On Sun, 27 Feb 2005 18:12:17 -0700, rumours say that Steven Bethard
<steven.bethard at gmail.com> might have written:

[snip Nick Coghlan's list comprehension]

[STeVe]
>On the other hand, filter doesn't do the same thing:
>
>py> s = u'The Beatles - help - 03 - Ticket to ride'
>py> filter(str.isalpha, s)
>Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
>TypeError: descriptor 'isalpha' requires a 'str' object but received a 
>'unicode'
>py> ''.join(c for c in s if c.isalpha())
>u'TheBeatleshelpTickettoride'

This works though:

.>> filter(type(s).isalpha, s)

As a function just for clarity.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From achrist at easystreet.com  Sun Feb 20 16:19:17 2005
From: achrist at easystreet.com (Al Christians)
Date: Sun, 20 Feb 2005 13:19:17 -0800
Subject: Article on Hi-Fi Myths
Message-ID: <111hvnra44hgr03@corp.supernews.com>

I learned Friday night that the hi-fi talk is our most popular tape.
This page:

http://www.belt.demon.co.uk/product/Cable_Controversy/Cable_Controversy.htm

Gives a somewhat different take on the controversy, almost certainly 
bizarre.  It's a long page and the interesting part is near the end.
The conclusion is:

	"you just need to know what techniques to use to create a 		 
'friendly', 'relaxing', energy pattern."

Al


From claird at lairds.us  Wed Feb  9 22:08:11 2005
From: claird at lairds.us (Cameron Laird)
Date: Thu, 10 Feb 2005 03:08:11 GMT
Subject: Pioneers of WIMPishness (was: A great Alan Kay quote)
References: <420a5c1e$0$21630$a1866201@visi.com>
	<420a6491$0$29509$a1866201@visi.com>
	<mailman.2270.1107980587.22381.python-list@python.org>
	<420ab9c9$1@nntp0.pdx.net>
Message-ID: <c6vqd2-bqv.ln1@lairds.us>

In article <420ab9c9$1 at nntp0.pdx.net>,
Scott David Daniels  <Scott.Daniels at Acm.Org> wrote:
			.
		[thoroughly appropriate
		focus on Engelbart and
		his Augment colleagues]
			.
			.
>(or great) guess and charge forward.  They produced the mouse, and the
>earliest "linked" documents that I know of.
>
>     http://sloan.stanford.edu/MouseSite/1968Demo.html
			.
			.
			.
I entirely agree that Engelbart deserves full recognition for his
achievements.  At the same time, I think we also should note that
Ted Nelson was publishing articles about "hypertext" in '65, and
Vannevar Bush lucidly explained his vision for textual linking in
'45.  With a little provocation, I can push the ideas of "mechanical"
or "machine" referencing back at least to the Enlightenment, and
arguably much farther.


From tchur at optushome.com.au  Mon Feb  7 22:08:56 2005
From: tchur at optushome.com.au (Tim Churches)
Date: Tue, 08 Feb 2005 14:08:56 +1100
Subject: Big development in the GUI realm
Message-ID: <200502080308.j1838u3x015843@mail24.syd.optusnet.com.au>

An embedded and charset-unspecified text was scrubbed...
Name: not available
URL: <http://mail.python.org/pipermail/python-list/attachments/20050208/c64827a8/attachment.ksh>

From tim.leeuwvander at nl.unisys.com  Wed Feb  2 12:32:53 2005
From: tim.leeuwvander at nl.unisys.com (Leeuw van der, Tim)
Date: Wed, 2 Feb 2005 18:32:53 +0100
Subject: Crashing Python interpreter! (windows XP, python2.3.4, 2.3.5rc1,
	2.4.0)
Message-ID: <BF88DF69D9E2884B9BE5160DB2B97A85010D703E@nlshl-exch1.eu.uis.unisys.com>

Hi all,

I can use this version of gtk and PyGtk to run simple programs. There seems to be no problem with the code-completion in PythonWin.
I can do: dir(gtk) without problems after importing the gtk module of PyGtk, when I use idle or console. (Python version for this test: python2.4, python 2.3.5rc1)

I already knew that I could run simple PyGtk programs with this combination of Python, PyGtk, and Gtk. Also knew already, that the code completion in the PythonWin IDE works.
The crash comes when invoked from pydev under eclipse. So I can't remove them from the equation (I mentioned the problem also on the Pydev Sourceforge-forum, but decided to post here since it's the interpreter crashing).

It's the "send/don't send" type of error box, so I choose "don't send" at that point since that will only send crash info to Microsoft... no point in that! :-)

It could of course be a problem in the GTK DLLs and I haven't yet had time to test with older GTK versions. Hopefully I can try that tomorrow.

cheers,

--Tim


-----Original Message-----
From: python-list-bounces+tim.leeuwvander=nl.unisys.com at python.org [mailto:python-list-bounces+tim.leeuwvander=nl.unisys.com at python.org]On Behalf Of Stefan Behnel
Sent: Wednesday, February 02, 2005 3:59 PM
To: python-list at python.org
Subject: Re: Crashing Python interpreter! (windows XP, python2.3.4, 2.3.5rc1, 2.4.0)



Leeuw van der, Tim schrieb:
> I'm using the following combination of software:
> - Pydev Eclipse plugin (pydev 0.8.5)
> - eclipse 3.0.1 
> - windows XP SP1
> - pygtk 2.4.1
> - GTK 2.6.1 (for windows32 native)

First of all, try tightening the field. Are all of these packages needed to 
reproduce the error? Try to start the interpreter in a command line window and 
see if it happens there, too. That eliminates Eclipse.


> When trying to get a list of possible completions for the 'gtk' import object, the python interpreter crashes. Happens with all versions listed in the subject: python 2.3.4, 2.3.5rc1, 2.4.0.

Might be a problem with GTK for Windows, I don't know.

Type
import gtk
Does that crash? Or is it something like
dir(gtk)

Try different versions of GTK and pygtk. Look at the pygtk homepage to see 
which combination is known to work.

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


From whereU at now.com  Wed Feb  9 00:58:06 2005
From: whereU at now.com (Eric Pederson)
Date: Tue, 8 Feb 2005 21:58:06 -0800
Subject: variable declaration
In-Reply-To: <pt1c015297m7t64cu2g27dbjbrl2ehacbi@4ax.com>
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<qb1a01lk3mv4vp852q88prqb9al336h9r2@4ax.com>
	<1grj036.r13xcy1d72inbN%aleaxit@yahoo.com>
	<2qba01d1men2ai48gp4cojo2e28rd5g9ob@4ax.com>
	<1grjzia.1a4qr9q1t3p77bN%aleaxit@yahoo.com>
	<pt1c015297m7t64cu2g27dbjbrl2ehacbi@4ax.com>
Message-ID: <20050208215806.1895703321.whereU@now.com>

Arthur artfully argued:

> What if:
> 
> There was a well conducted market survey conclusive to the effect that
> adding optional strict variable declaration would, in the longer run,
> increase Python's market share dramatically.


It's always good to examine one's objectives and motives.  I am an enthusiast for marketing Python, but why?  Would I get something out of Python being the language du jour?  If everyone starts using Python when I am an old hand with the language, will it elevate me?  Is a world where people use a programming language called "Python" necessarily a better world?

For me the answer to those questions is no.

So what would I like?

Just the option to use Python when and where it suits me and my tasks  - and the continued excellent quality development and maintenance of Python and Python libraries.


> It just would. 

Right!

All the cool kids (and if you want to be popular you need to):

    smoke/smoke dope/get tatoo'd/fight/climb the water tower/get pierced/get drunk/call their girlsfriends a b!#ch/shop lift/ditch school/put their fingers into an electrical outlet


Declare variables?

Hey, what's one more compromise to get popular?!


(I shudder thinking where that slippery slope leads)




[Nothing above is meant to imply I haven't done stupid things; rather perhaps that I've already done more than enough to know better; and, by the way, I'm still not "popular".  I'd hope GvR and the crew "keep Python Python"]




Eric Pederson
http://www.songzilla.blogspot.com



From as006d4848 at blueyonder.co.uk  Sun Feb  6 02:40:50 2005
From: as006d4848 at blueyonder.co.uk (Philip Smith)
Date: Sun, 06 Feb 2005 07:40:50 GMT
Subject: Multiple constructors
Message-ID: <6SjNd.38337$K7.21639@fe2.news.blueyonder.co.uk>

Call this a C++ programmers hang-up if you like.

I don't seem to be able to define multiple versions of __init__ in my matrix 
class (ie to initialise either from a list of values or from 2 dimensions 
(rows/columns)).

Even if Python couldn't resolve the __init__ to use on the basis of argument 
types surely it could do so on the basis of argument numbers???

At any rate - any suggestions how I code this????

Thanks

Phil 




From rynt at yahoo9.com  Mon Feb 28 10:21:07 2005
From: rynt at yahoo9.com (Ruben Baumann)
Date: Mon, 28 Feb 2005 07:21:07 -0800
Subject: TKinter
References: <38eb4lF5nldh7U1@individual.net>
Message-ID: <LtmdndXp_YV5q77fRVn-ug@megapath.net>

"anthonyberet" <nospam at me.invalid> wrote in message 
news:38eb4lF5nldh7U1 at individual.net...
> So, is it pronounced 'Tee-Kinter', or 'Tee-Kay-Inter'?
> I don't want to appear as a dork down the pub.

How about Tic-Inter.  :-)





From arvid at linux.se  Sat Feb  5 17:02:18 2005
From: arvid at linux.se (Arvid Andersson)
Date: Sat, 05 Feb 2005 23:02:18 +0100
Subject: How do I convert arithemtic string (like "2+2") to a number?
Message-ID: <4205426A.5050805@linux.se>

Hello, I need to convert a string to a number, but the string can 
contain +,-,* and / as well as parenthesis. For example, if I have the 
string "30/(6+9)" I would like a function that returned the number 2.

I actually wrote a java function that did this a couple of years ago, in 
school, as an excersise in "binary trees". I lost it, and most of my 
programming knowledge, but I figured perhaps there is a way to do this 
easily in python? It seems to me like it could be a common problem.

/Arvid Andersson


From ilias at lazaridis.com  Tue Feb 15 10:43:41 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 17:43:41 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <curevc$p6r$1@news1.ucsd.edu>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq1he$cd7$1@news1.ucsd.edu>
	<cuq5du$k7g$1@usenet.otenet.gr> <curevc$p6r$1@news1.ucsd.edu>
Message-ID: <cut5ba$lsq$1@usenet.otenet.gr>

Robert Kern wrote:
> Ilias Lazaridis wrote:
[...]
>>> Questions and suggestions are don't count for much in this
>>> community. Code and well-written patches do.
>>> 
>>> Stop wasting time on c.l.py and get to work! If you can't do
>>> that, then this is not the community you are looking for.
>> 
>> Please speak for yourself.
> 
> I think that my participation in the community for the past six years
>  and a rational examination of the responses you have received so far
>  qualify me, just a little bit, to conclude that this community does
> not tolerate your kind of behaviour well.

I do tolerate their behaviour.

I have to.

This is a public resource.

> If you want one that does so tolerate your behaviour, you need to
> keep looking.

I don't need to look.

They read, silently, deriving their conclusions.

About me.

About you.

About the python community.

[It is of course sad, that the "bad manners" / "missing focusation on 
the context" of the actively writing part reflects directly to the whole 
community.]

>>>> There are many commercial systems around python.
>>> 
>>> And yet there is not one company that has someone devoted
>>> full-time to developing Python. Not even Guido.
>> 
>> Who's "Guido"?
> 
> The guy who wrote Python originally and is still the head developer.

ok

http://www.python.org/~guido/

>>> Most of core-Python development happens in people's spare, unpaid
>>> time.
>>> 
>>> Volunteerism is the core of this community. Trust me.
>> 
>> even if:
>> 
>> Volunteerism does not exclude Professionalism.
> 
> Volunteerism does not, indeed, exclude professionalism. However,
> being professional does not entail satisfying the desires of everyone
> who asks. Being professional does not mean that volunteerism is not
> the driving force of this community.
> 
> If this does not appeal to you, then this is not the community that
> you are looking for.

I've not understood what you've written.

But I understand that it is not relevant to the topic.

>>>> So please stop this volunteerism-stuff.
>>> 
>>> No. You are asking others to volunteer their time, or perhaps, 
>>> alternately, the PSF and other businesses to volunteer their
>>> money to fund people's time to satisfy *your* wants. I am asking
>>> you to volunteer *your* time to satisfy *your* wants,
>> 
>> I'm already doing this.
> 
> Okay, let me clarify: 
[...] - (processing model)

Your suggestions affecting my processing model are irrelevant.

>>> or alternately, stop writing questionnaires and bothering us.
>> 
>> Feel free to ignore the threads.
> 
> I would have been more than happy to until my web page was used. Now
> I feel some obligation to correct some things.

You webpage is a public resource.

And it was terribly outdated.

Now you have corrected your website.

Thank you.

>> And please speak for yourself.
> 
> I am speaking as a member of this community, not necessarily for this
>  community. But I do have some experience with how this community
> behaves and how it responds to people who behave like you do. I know
> that they do not mix well at all.
> 
> If you want a community that does tolerate this behaviour, you need
> to keep looking.

I'm not looking for such a community.

>>> Note that this reaction is pretty specific to you and not to
>>> other newcomers. Most newcomers do not carry around a sense of
>>> entitlement that could flatten a small village. Thus, they are
>>> treated with respect and helpfulness. We would appreciate it if
>>> you would emulate these people. On a purely pragmatic note, you
>>> have to admit that they are getting much better help than you
>>> are.
>> 
>> I get the help that I want.
> 
> You could do it much more efficiently.
[...] - (processing suggestions detected, not readed)

sorry, my processing is not the topic here.

>>>> If you like to help me and other newcomers, please give me
>>>> simple some answers on the initial questions.
>>> 
>>> I did provide some answers. Please review them again.
>> 
>> Please have the gentleness [against me and the current/future
>> readers] to answer within the context of the original writings.
> 
> I will be more careful in the future.

You can still give your answers within the main thread, thus they don't
get lost in this huge thread.

.

-- 
http://lazaridis.com


From autismuk at autismuk.muralichucks.freeserve.co.uk  Tue Feb  1 08:29:35 2005
From: autismuk at autismuk.muralichucks.freeserve.co.uk (Paul Robson)
Date: Tue, 01 Feb 2005 13:29:35 +0000
Subject: Suggesion for an undergrad final year project in Python
References: <1107241918.722156.123590@c13g2000cwb.googlegroups.com>
	<7mKLd.18577$MX2.6627@twister.nyroc.rr.com>
Message-ID: <pan.2005.02.01.13.29.34.553770@autismuk.muralichucks.freeserve.co.uk>

On Tue, 01 Feb 2005 12:11:47 +0000, Kartic wrote:

> Sridhar said the following on 2/1/2005 2:11 AM:
>> Hi,
>> 
>> I am doing my undergrade CS course.  I am in the final year, and would
>> like to do my project involving Python.  Our instructors require the
>> project to have novel ideas.  Can the c.l.p people shed light on this
>> topic?
> 
> You try and implement some CS concepts you have learnt using Python. For 
> example, if you had a course on parsing and compiler design, try to 
> implement a simple language in Python.

Could I suggest going for an area that particularly interests you ; rather
than saying "what sort of project ...." come up with an area of interest -
this'll mean you probably have more knowledge and will put in more
effort - and then ask for ideas - ideally about something that is missing.



From manatlan_no_s_p_a_m at free.fr  Tue Feb  1 02:48:31 2005
From: manatlan_no_s_p_a_m at free.fr (manatlan)
Date: Tue, 01 Feb 2005 08:48:31 +0100
Subject: "Mail receiver server"
In-Reply-To: <f4BLd.13506$8H2.2643@twister.nyroc.rr.com>
References: <41feaff2$0$2068$626a14ce@news.free.fr> <opslhnnyv6dob4us@ibis>
	<41feb541$0$27942$636a15ce@news.free.fr>
	<f4BLd.13506$8H2.2643@twister.nyroc.rr.com>
Message-ID: <41ff344f$0$2067$626a14ce@news.free.fr>

Kartic a ?crit :
> manatlan said the following on 1/31/2005 5:46 PM:
> 
>>
>> I like the idea, but how to connect the virtual smtp and a python 
>> script ?
>>
>> but ... There should be a way to be python only ... because i don't 
>> want to be very complex, i just want to get the subject of the email, 
>> to run some commands (and perhaps get a attachment file) ... but 
>> that's all
>> i am pretty sure that a recipe exists ... that a man has already done 
>> that !
>> But i don't know what to query on google ...
> 
> 
> Hi,
> 
> What you are trying to do is what is called a mail filter. So google for 
> python mail filter and see what you get.
> 
> With this setup, lets say Computer B sends an email to user controluser 
> on Computer  A , the email is actually passed off to a script (in your 
> case python script) to process the incoming email, instead of actually 
> delivering the email to the user's inbox on "A".
> 
> I don't have the faintest the idea how you would do this on IIS's 
> virtual SMTP server; there is probably a setup user panel. In any case, 
> on UNIXish systems, there are a few ways of doing it of which one way is 
> to setup a user in a file called /etc/aliases and put an entry like this:
> 
> controluser: | /usr/local/bin/mailprocessor.py
> 
> which tells the SMTP server to pass off the email to script after the | 
> (pipe) when controluser gets an email.
> 
> So, see if the SMTP control panel provides you with some such feature. 
> If IIS does not, my suggestion to you will be to install Cygwin from 
> cygwin.com and use the Exim Mail transfer agent available with Cygwin 
> (You will have to choose that when installing Cygwin, it is not 
> automatically installed) or please google for Windows SMTP Server and 
> see if something piques your interest.
> 
> Now, coming to the Python related part. Your SMTP server will invoke 
> your script by sending the incoming email data on your script's sysin.
> 
> So, from python you will do...
> 
> #!/usr/local/bin/python
> import sys, email, os
> 
> em = email.message_from_file(sys.stdin) # Read message from Std Input
> subject = em.get('Subject')             # Get the subject from em object
> if subject.startswith('reboot'):
>    os.system('shutdown -r') # reboot the Server
> 
> For more information, please read the email module in the Python Module 
> Docs.
> 
> Hope that will help you get started!
> 
> Thanks,
> --Kartic

thanx a lot for yours informations ...
it was very interesting ...

in fact, i've already built a "smtp filter" with the virtual smtp server 
of iis ... (3 years ago)
But with techno of microsoft ... with event sink and vbs ...
and i think there is no way to do it with python ...
it could be possible to do it again with dot.net ...

but i've found what i wanted here :
http://www-106.ibm.com/developerworks/webservices/library/ws-pyth12.html

it seems it could be possible to build its own smtpd with python ... and 
interact in a simple way ...

i will choose this solution ... i'm fed up with microsoft way
and could be reused on my linux box too ;-)

i will have a look ...


From steven.bethard at gmail.com  Sat Feb 12 19:43:09 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 12 Feb 2005 17:43:09 -0700
Subject: help please
In-Reply-To: <a-ydnSC3VNPaPJPfRVn-jQ@speakeasy.net>
References: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
	<a-ydnSC3VNPaPJPfRVn-jQ@speakeasy.net>
Message-ID: <TPKdnUyeEu8KP5PfRVn-vg@comcast.com>

Erik Max Francis wrote:
> gargonx at gmail.com wrote:
> 
>> UnboundLocalError: local variable 't2' referenced before assignment
> 
>     ...
> 
>> t2=""
>>
>> def Proc(text): # "text" is some random text or use OrigText
>>     ...
>
> The fix is to declare t2 global at the top of Proc:
> 
>     def Proc(text):
>         global t2
>         ...

But please don't.  The global declaration is a wart of Python, and in 
most cases, your code will be much cleaner if you avoid it.  Certainly 
in this case, making t2 a local of the function is much more sensible. 
If you stick with your current implementation (which I advise against), 
you should write it something like:

def proc(text):
     t2 = ""
     ...
     # your Proc code here
     ...
     return t2

Steve


From paddy3118x at netscape.net  Tue Feb  8 14:58:33 2005
From: paddy3118x at netscape.net (Paddy McCarthy)
Date: Tue, 08 Feb 2005 19:58:33 GMT
Subject: Choosing the right parser for parsing C headers
In-Reply-To: <1107861023.254610.14310@g14g2000cwa.googlegroups.com>
References: <1107861023.254610.14310@g14g2000cwa.googlegroups.com>
Message-ID: <JR8Od.58261$K7.15138@fe2.news.blueyonder.co.uk>

Jean de Largentaye wrote:
> Hi,
> 
> I need to parse a subset of C (a header file), and generate some unit
> tests for the functions listed in it. I thus need to parse the code,
> then rewrite function calls with wrong parameters. What I call "shaking
> the broken tree" :)
> I chose to make my UT-generator in Python 2.4. However, I am now
> encountering problems in choosing the right parser for the job. I
> struggle in choosing between the inappropriate, the out-of-date, the
> alpha, or the too-big-for-the task...

Why not see if the output from a tags file generator such as ctags or 
etags will do what you want.

I often find that some simpler tools do 95% of the work and it is easier 
to treat the other five percent as broken-input.

try http://ctags.sourceforge.net/


- Paddy.


From gandalf at geochemsource.com  Tue Feb  8 09:20:20 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Tue, 08 Feb 2005 15:20:20 +0100
Subject: python connect to server using SSH protocol
In-Reply-To: <4208bdfa$1@sia.uibk.ac.at>
References: <1107850655.289129.94880@o13g2000cwo.googlegroups.com>	<mailman.2174.1107867553.22381.python-list@python.org>
	<4208bdfa$1@sia.uibk.ac.at>
Message-ID: <4208CAA4.3080104@geochemsource.com>


>
> import os
> fi, foe = os.popen4 ('ssh dopey')
> print >>fi, 'ls'
> fi.close ()  # <-- this is annoying
> for line in foe:
>    print line,
> foe.close ()
>
> The above connects to a server, passes the command 'ls', which is 
> executed there, and prints the returned result.
>
> However, reading from foe succeeds only if fin has been closed before. 
> An fi.flush() seems to be not sufficient. 

Hmm. Is it possible to use ssh for simple port forwarding (-L option) 
and write a server program on the remote machine?



-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From zyqnews at 163.net  Fri Feb 18 22:10:36 2005
From: zyqnews at 163.net (zyqnews at 163.net)
Date: 18 Feb 2005 19:10:36 -0800
Subject: unicode and socket
In-Reply-To: <opsmeqf1w76yt6e7@news.cisco.com>
References: <1108753426.318777.275250@c13g2000cwb.googlegroups.com>
	<opsmeqf1w76yt6e7@news.cisco.com>
Message-ID: <1108782636.359541.99450@z14g2000cwz.googlegroups.com>

It's really funny, I cannot send a unicode stream throuth socket with
python while all the other languages as perl,c and java can do it.
then, how about converting the unicode string to a binary stream? It is
possible to send a binary through socket with python?



From jacek.generowicz at cern.ch  Tue Feb  1 11:31:03 2005
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 01 Feb 2005 17:31:03 +0100
Subject: type of simple object
References: <1107255752.258025.50870@z14g2000cwz.googlegroups.com>
	<1107257264.146280.89560@c13g2000cwb.googlegroups.com>
	<1107258136.815344.145380@c13g2000cwb.googlegroups.com>
	<tyfy8e8lcef.fsf@pcepsft001.cern.ch>
	<1107261198.943087.80960@z14g2000cwz.googlegroups.com>
	<tyfhdkwl9u3.fsf@pcepsft001.cern.ch>
	<1107265279.327793.26430@z14g2000cwz.googlegroups.com>
Message-ID: <tyfd5vkkzso.fsf@pcepsft001.cern.ch>

"ajikoe at gmail.com" <ajikoe at gmail.com> writes:

> Hello Jacek,
> 
> Thanks for the answer,
> 
> Can you tell me how can I check if an object is a sequence (you are
> right, this is actually what I want)?

You try to use it as a sequence. If it works, then it was a
sequence. If it was not a sequence, you handle the exception and do
something appropriate.

For example:

>>> def f(seq, something):
...     try:
...             number = sum(something)
...     except TypeError:
...             number = something
...     return [number*item for item in seq]
... 
>>> f([1,2,3], 4)
[4, 8, 12]
>>> f([1,2,3], [1,2,3])
[6, 12, 18]
>>> f([1,2,3], (1,2,3))
[6, 12, 18]
>>> f([1,2,3], {1:'one', 2:'two', 3:'three'})
[6, 12, 18]


From jonas at freesources.org  Sun Feb 20 12:21:21 2005
From: jonas at freesources.org (Jonas Meurer)
Date: Sun, 20 Feb 2005 18:21:21 +0100
Subject: questions concerning cgi.FieldStorage(keep_blank_values=1)
In-Reply-To: <37rtmjF5gk5l2U1@individual.net>
References: <mailman.2865.1108917022.22381.python-list@python.org>
	<37rtmjF5gk5l2U1@individual.net>
Message-ID: <20050220172120.GB4727@resivo.mejo.net>

On 20/02/2005 Daniel Lichtenberger wrote:
> > any suggestions about how to make form.keys() contain the blank keys
> > as well?
> 
> "key1" isn't a valid parameter, to supply an empty key you would write
> script.py?key1=&key2=foo
> 
> Then cgi.FieldStorage also includes key1.

great, it works. but is there no way to use single keywords as GET
argument?

bye
 jonas


From sjmachin at lexicon.net  Fri Feb 25 20:51:31 2005
From: sjmachin at lexicon.net (John Machin)
Date: 25 Feb 2005 17:51:31 -0800
Subject: weird strings question
In-Reply-To: <ImQTd.7095$Ba3.1886@newsread2.news.atl.earthlink.net>
References: <ImQTd.7095$Ba3.1886@newsread2.news.atl.earthlink.net>
Message-ID: <1109382691.597327.50470@f14g2000cwb.googlegroups.com>


Lucas Raab wrote:
> Is it possible to assign a string a numerical value?? For example, in

> the string "test" can I assign a number to each letter as in "t" =
45,
> "e" =  89, "s" = 54, and so on and so forth??
>
> TIA

>>> for c in 'abcd':
...    print c, ord(c)
...
a 97
b 98
c 99
d 100

If that isn't what you mean, you may need to rephrase your question.



From peter at engcorp.com  Wed Feb  9 18:02:09 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 09 Feb 2005 18:02:09 -0500
Subject: Crash in thread on program termination
In-Reply-To: <mailman.2278.1107987899.22381.python-list@python.org>
References: <mailman.2278.1107987899.22381.python-list@python.org>
Message-ID: <0cKdnbPXN5sTC5ffRVn-qQ@powergate.ca>

Alec Wysoker wrote:
> I have several programs that have two or more threads.  The threads 
 > that are not the main thread are daemon threads, i.e. the fact
 > that they are running should not stop the program from terminating
 > if the main thread (the only non-daemon thread) terminates.
> 
> Traceback (most recent call last):
[...]
>   File "C:\Python23\lib\threading.py", line 238, in notify
>     currentThread() # for side-effect
> TypeError: 'NoneType' object is not callable
> 
> What seems to be happening is that at the time the thread is stopped, the threading 
 > module object is no longer in an unhealthy state.
> I.e. threading.currentThread is None.

In a nutshell, the interpreter is dismantling itself while the
daemon threads merrily continue to run -- or attempt to.  During
one of the steps in this dismantling process, the interpreter
goes through and rebinds all the globals in all modules to the
None object.  You're seeing the effect of a daemon thread
encountering the inevitable bad effects of this.

For background, search the list archives and focus on messages
written by Tim Peters.  Also try Googling the web for, say,
"python interpreter daemon thread shutdown nonetype" or
something... there are various not entirely conclusive threads
on the subject here and there.

I'm not sure there is a generally acceptable solution.  You'll
notice that the ultimate response of the code in __bootstrap()
is still to try to print to stderr... which is a harmless but
otherwise perhaps distracting thing to do.

In my own code where this was a bother, I have something like
the following at the highest levels of the run() method of
my daemon threads:

     def run(self):
         try:
             # do real stuff here
         except Exception, ex:
             if (self.isDaemon() and
                 isinstance(ex, AttributeError) and
                 ex[0].startswith("'NoneType'")):
                 pass

In other words, I'm attempting to catch those specific types of
spurious error and avoid letting __bootstrap() have its say.
At the moment, 98% of the spurious messages are gone and that's
good enough for my purposes...

-Peter


From francis.girard at free.fr  Sun Feb 13 12:19:31 2005
From: francis.girard at free.fr (Francis Girard)
Date: Sun, 13 Feb 2005 18:19:31 +0100
Subject: Alternative to raw_input ?
In-Reply-To: <cuio9f$13k8$1@ns.felk.cvut.cz>
References: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>
	<w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>
	<cuio9f$13k8$1@ns.felk.cvut.cz>
Message-ID: <200502131819.32613.francis.girard@free.fr>

Le vendredi 11 F?vrier 2005 18:00, den a ?crit?:
> import msvcrt
> msvcrt.getch()

I frequently had the problem to have something similar but *portable*.
Something as short and simple.

Someone have an idea ?

Thank you

Francis Girard



From jdadson at yahoo.com  Tue Feb  8 22:23:56 2005
From: jdadson at yahoo.com (Jive Dadson)
Date: Wed, 09 Feb 2005 03:23:56 GMT
Subject: interactive execution
References: <42096A7A.2D8CF4E1@yahoo.com> <110isa55vfvhr79@corp.supernews.com>
Message-ID: <42098308.7F0C6A41@yahoo.com>



Jeff Shannon wrote:
> 
> Jive Dadson wrote:
> 
> > How does one execute arbitrary text as code within a module's context?
> >
> > I've got some code that compiles some text and then executes it.  When
> > the string is "print 'Hello'", it prints "Hello".  I get no exception
> > when I compile and execute "foo = 555".  If I then compile and exec
> > "print foo", I get a name error. The variable foo is undefined. My
> > assumption is that the "exec" command created a new namespace, put "foo"
> > in that namespace, and then threw the namespace away.  Or something.
> 
> You can do
> 
>     exec codestring in globaldict, localdict
> 
> (Or something like that, this is from unused memory and is untested.)
>   The net effect is that exec uses the subsequent dictionaries as its
> globals and locals, reading from and writing to them as necessary.
> 
> (Note that this doesn't get you any real security, because malicious
> code can still get to __builtins__ from almost any object...)
> 
> Jeff Shannon
> Technician/Programmer
> Credit International

Promising, but,

Traceback (most recent call last):
  File "F:/C++ Projects/zardude/temp.py", line 9, in -toplevel-
    exec "foo = 555" in globaldict, localdict
NameError: name 'globaldict' is not defined


From irmen.NOSPAM at xs4all.nl  Fri Feb 11 16:29:36 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Fri, 11 Feb 2005 22:29:36 +0100
Subject: is there a safe marshaler?
In-Reply-To: <mailman.2418.1108156947.22381.python-list@python.org>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl><420b9135$0$28982$e4fe514c@news.xs4all.nl><3b091a1c.0502110634.5edb1987@posting.google.com><mailman.2405.1108144870.22381.python-list@python.org>	<cuit7n$jje$1@panix3.panix.com>
	<mailman.2418.1108156947.22381.python-list@python.org>
Message-ID: <420d23bf$0$28991$e4fe514c@news.xs4all.nl>

Fredrik Lundh wrote:

>>>>import os
>>>>os.path.getsize("BL.xml")
> 
> 1302
> 
>>>>from xml.dom import minidom
>>>>x = minidom.parse("BL.xml")
> 
> 
> (have patience.  have lots of patience.)

Hehe, the XML killer file "BillionLaughs"... correct?

--Irmen


From gabriel.barros at gmail.com  Tue Feb  8 09:09:04 2005
From: gabriel.barros at gmail.com (Gabriel B.)
Date: Tue, 8 Feb 2005 12:09:04 -0200
Subject: trolltech comitment (was:Big development in the GUI realm)
In-Reply-To: <ndhg011h971bdl5o1i4k76j6n3tp15m38b@4ax.com>
References: <mailman.2135.1107829480.22381.python-list@python.org>
	<e0ag011atnlt5b00klicjol93c7j8fe341@4ax.com>
	<ndhg011h971bdl5o1i4k76j6n3tp15m38b@4ax.com>
Message-ID: <5175a81c05020806093b2a1578@mail.gmail.com>

On Mon, 07 Feb 2005 20:56:44 -0800, Courageous <dontwant at spam.com> wrote:
> Follow the copyright holder's wishes.
> 
> That's fair. After all, it's free, so they're doing you a damn
> big favor.

I'm terrible sorry to extend this topic even furter, but it's silly,
not to say dull to think like that.

in the first place, it's not that they're doing charity. they have
plans. if they release Qt under GPL for non-comercial use, it's
because they want to increase the user base and so be able to earn
money with the comercial fee later.

And if i'm going to write software for it, when there's plenty of
alternative that actualy works flawless under windows, why should i
stick with an option that i don't even know to wich extends i can use
the damn thing? What it they revoke this license? what it windows
longhorn has a non-backwardcompatible GDI API and a newer version of
Qt must be used, and that newer version does not have a gpl version?

If i'm going to commit to something, i like to know the lengths the
other side gona commit also.

What you said was like "Hey! it's free food! who cares if it's
rotten?" sorry, but it's just too homer simpson for me.


From devries at idolstarastronomer.com  Mon Feb  7 16:15:51 2005
From: devries at idolstarastronomer.com (Christopher De Vries)
Date: Mon, 7 Feb 2005 16:15:51 -0500
Subject: python code with indention
In-Reply-To: <dMKdnSk-aNR7T5rfRVn-3w@rogers.com>
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
	<dMKdnSk-aNR7T5rfRVn-3w@rogers.com>
Message-ID: <20050207211551.GA9442@miyu.cjas.org>

On Mon, Feb 07, 2005 at 03:43:15PM -0500, Dan Perl wrote:
> 
> "Xah Lee" <xah at xahlee.org> wrote in message 
> news:1107805151.265680.165380 at o13g2000cwo.googlegroups.com...
> > is it possible to write python code without any indentation?
> 
> I read just today in a tutorial that "Python on the other hand, does not 
> even allow changes in code's indentation".  Maybe the author of that 
> tutorial can help? 

And to think he posted both on the same day. It'd be funny if it weren't so
sad... actually it's just funny. 

Anyway, in response to the question see
http://docs.python.org/ref/indentation.html#l2h-9 

A sequence of statements without any looping or function or class definitions
can probably be done without any indenting. 

Chris


From nospam at me.com  Sun Feb 13 22:16:29 2005
From: nospam at me.com (Jim Wallace)
Date: Mon, 14 Feb 2005 03:16:29 GMT
Subject: Help with embedding fully qualified script name
Message-ID: <hKUPd.12218$oO.7293@newsread2.news.atl.earthlink.net>

I'm trying to call a method in a script file given a fully qualified file 
name, e.g. c:\myscript\test.py.  I find that PyImport_Import("test") works 
fine, with c:\myscript is set as the first item in the PYTHONPATH.

I tried PyRun_Simple and that does run my specific file, but then when I try 
to use the calls below that I used on PyImport_Import, I get a null function 
returned.  I've tried the other methods that use a FILE and they do the same 
thing.

pDict = PyModule_GetDict ( pModule );
pFunc = PyDict_GetItemString ( pDict, "MyFunction" );

I also tried doing things like creating a new module, etc. since I thought 
that may work, but suspect that I was missing some steps.

The basic flow I want to do is this, with only the first step being my 
problem.

1) Load the script file ??
2) Get the function "MyFunction" from the script (PyModule_GetDict, 
PyDict_GetItemString)
3) Call that function PyObject_CallObject

I appreciate any help since I've spent quite a bit of time searching and 
trying things.

Jim W.





From lbates at syscononline.com  Wed Feb  9 08:53:55 2005
From: lbates at syscononline.com (Larry Bates)
Date: Wed, 09 Feb 2005 07:53:55 -0600
Subject: Performance Issues of MySQL with Python
In-Reply-To: <1107954472.246556.258030@g14g2000cwa.googlegroups.com>
References: <1107954472.246556.258030@g14g2000cwa.googlegroups.com>
Message-ID: <nZSdnTg8WJtuiJffRVn-rQ@comcast.com>

Wow, you give us too much credit out here.  From your
post we can't determine anything about what you plan
to do (how is your data structured, how much data do
you have, can it be indexed to speed up searching...).

Python and MySQL work together beautifully.  ANY SQL
database's performance is more about properly defining
the tables and indexes where appropriate than about
language uses to it.  You can write compiled C (or any
other language for that matter) that calls a poorly
designed database that gets terrible performance.  A
well thought out database structure with good choices
for indexes can give you outstanding performance when
called from any language.  Ultimately it comes down
to building a SQL query and passing it to the SQL
database and getting back results.  Front end language
isn't all that important (unless you must post-process
the data in the program a lot).  It is not uncommon
to get 100x or 1000x speed increases due to adding
proper indexes to tables or refactoring master-detail
table relationships in any SQL database.  You can't
get that by changing languages or even purchasing
faster hardware.

MySQL is particularly good when your read operations
outnumber your writes.  US Census Bureau uses MySQL
because they have static data that gets read over and
over (even though my understanding is that they have
an Oracle site license).  Databases that are transaction
oriented (e.g. accounting, etc.) can sometimes benefit
from the highly transactional nature of an Oracle or
DB2 or Postgres.  Later versions of MySQL have added
transactions, but the support is IMHO a step behind
the big guys in this area.  Also, if you want to be
highly scalable so as to provide for clustering, of
database servers, etc.  MySQL doesn't do that well
in this area, YET.

I hope my random thoughts are helpful.

Larry Bates


sandy wrote:
> Hi All,
> 
> I am a newbie to MySQL and Python. At the first place, I would like to
> know what are the general performance issues (if any) of using MySQL
> with Python.
> 
> By performance, I wanted to know how will the speed be, what is the
> memory overhead involved, etc during database specific operations
> (retrieval, update, insert, etc) when MySQL is used with Python.
> 
> Any solutions to overcome these issues (again, if any)?
> 
> Thanks and Regards,
> Sandeep
> 


From steven.bethard at gmail.com  Mon Feb 28 16:03:38 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 28 Feb 2005 14:03:38 -0700
Subject: String Replace Problem...
In-Reply-To: <e5063e96.0502281129.5e129061@posting.google.com>
References: <mailman.3138.1109605552.22381.python-list@python.org>
	<e5063e96.0502281129.5e129061@posting.google.com>
Message-ID: <8KqdnUR88Z-4Gr7fRVn-2A@comcast.com>

Sean McIlroy wrote:
> f = lambda x: (x[0]=='@' and x[6:] + '.0') or (x=='/' and x + '\n') or
> x

See "Inappropriate use of Lambda" in 
http://www.python.org/moin/DubiousPython.

You're creating a named function, so there's no reason to use the 
anonymous function syntax.  Try:

def f(x):
     return (x[0]=='@' and x[6:] + '.0') or (x=='/' and x + '\n') or x

or if it must be on one line:

def f(x): return (x[0]=='@' and x[6:] + '.0') or (x=='/' and x + '\n') or x

Personally, I would probably write this as IMHO more readable:

infile, outfile = open("Errors.txt"), open("Errors_2.txt")
for i, line in enumerate(infile):
     permx, atpermx, rest = line.split(None, 2)
     outfile.write('  '.join([permx, str(parameter_values[i]), rest]))


In action:

py> s = """\
...   'PERMX'  @PERMX1  1 34  1  20  1 6
...   'PERMX'  @PERMX2  1 34  21 41  1 6
...   'PERMX'  @PERMX3  1 34  1  20  7 14
...   'PERMX'  @PERMX4  1 34  21 41  7 14
...   'PERMX'  @PERMX5  1 34  1  20 15 26
...   'PERMX'  @PERMX6  1 34  21 41 15 26
...   'PERMX'  @PERMX7  1 34  1  20 27 28
...   'PERMX'  @PERMX8  1 34  21 41 27 28
...   'PERMX'  @PERMX9  1 34  1  20 29 34
...   'PERMX'  @PERMX10  1 34  21 41 29 34
...   'PERMX'  @PERMX11  1 34  1  20 35 42
...   'PERMX'  @PERMX12  1 34  21 41 35 42
...   'PERMX'  @PERMX13  1 34  1  20 43 53
...   'PERMX'  @PERMX14  1 34  21 41 43 53
...   'PERMX'  @PERMX15  1 34  1  20 54 61
...   'PERMX'  @PERMX16  1 34  21 41 54 61
... """
py> parameter_values = range(1, 17)
py> for i, line in enumerate(s.splitlines()):
...     permx, atpermx, rest = line.split(None, 2)
...     print '  '.join([permx, str(parameter_values[i]), rest])
...
'PERMX'  1  1 34  1  20  1 6
'PERMX'  2  1 34  21 41  1 6
'PERMX'  3  1 34  1  20  7 14
'PERMX'  4  1 34  21 41  7 14
'PERMX'  5  1 34  1  20 15 26
'PERMX'  6  1 34  21 41 15 26
'PERMX'  7  1 34  1  20 27 28
'PERMX'  8  1 34  21 41 27 28
'PERMX'  9  1 34  1  20 29 34
'PERMX'  10  1 34  21 41 29 34
'PERMX'  11  1 34  1  20 35 42
'PERMX'  12  1 34  21 41 35 42
'PERMX'  13  1 34  1  20 43 53
'PERMX'  14  1 34  21 41 43 53
'PERMX'  15  1 34  1  20 54 61
'PERMX'  16  1 34  21 41 54 61

STeVe


From fuzzyman at gmail.com  Wed Feb  2 08:08:14 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 2 Feb 2005 05:08:14 -0800
Subject: Apache & Python 500 Error
In-Reply-To: <36bkqfF4sjt0oU1@individual.net>
References: <36bkqfF4sjt0oU1@individual.net>
Message-ID: <1107349694.737290.92240@l41g2000cwc.googlegroups.com>

What does the error log report ?

It is *possible*  that you are getting an error 500 because your are
not emitting valid headers.

Try this instead :

#!/usr/bin/python

print 'Content-Type: text/plain\r'
print '\r'
import os
print os.getcwd()
Regards,


Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From jaydonnell at gmail.com  Wed Feb  2 01:08:36 2005
From: jaydonnell at gmail.com (Jay  donnell)
Date: 1 Feb 2005 22:08:36 -0800
Subject: a quick question about namespaces
Message-ID: <1107324516.561056.164020@o13g2000cwo.googlegroups.com>

in the code below 'print locals()' shows mc2. What is the equivalent
way to see the namespace that mc resides in?


class myClass:
--def func1(self):
----self.mc = 1
----mc2 = 3
----print 'in myClass.func1'
----print 'printing locals'
----print locals()
----print

Google mungs up the spacing so I put a - in place of spaces. Does
anyone know how to get around this spacing issue on google groups?



From lee at example.com  Sun Feb  6 19:25:37 2005
From: lee at example.com (Lee Harr)
Date: Mon, 07 Feb 2005 00:25:37 GMT
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<opslnkqsjo6yt6e7@news.cisco.com>
	<7xhdktt36q.fsf@ruckus.brouhaha.com>
	<opslnr3rbs6yt6e7@news.cisco.com>
	<7xacqkc0uq.fsf@ruckus.brouhaha.com>
	<mailman.1892.1107532773.22381.python-list@python.org>
	<cu51m5$c6j$1@eeyore.INS.cwru.edu>
	<a4rNd.3807$Sw3.2134@news02.roc.ny>
	<LnvNd.104848$Jk5.61851@lakeread01>
Message-ID: <5AyNd.3878$pU3.330@news02.roc.ny>

>> Not only that, but with a well-design RDBMS you can put your
>> schema changes inside of a transaction and make sure everything
>> is right before committing.
>> 
> Bear in mind, however, that *most* common RDBMS will treat each DDL 
> statement as implicitly committing, so transactional change abilities 
> *don't* extend to schema changes.
>


I only use the free PostgreSQL which can make most schema
changes inside of transaction blocks. I believe that in 8.0
you can even change the type of a column in a transaction.

Free and easy to install (even on NT now in 8.0).

Very easy to use from python using psycopg or SQLObject.


From nsucvtw2module at mozilla.org  Sun Feb 13 06:48:12 2005
From: nsucvtw2module at mozilla.org (nsucvtw2module at mozilla.org)
Date: Sun, 13 Feb 2005 12:48:12 +0100
Subject: Python-list@python.org
Message-ID: <200502131150.j1DBovux023297@phoenix.szarvas.hu>

This message was not delivered due to the following reason:

Your message was not delivered because the destination computer was
unreachable within the allowed queue period. The amount of time
a message is queued before it is returned depends on local configura-
tion parameters.

Most likely there is a network problem that prevented delivery, but
it is also possible that the computer is turned off, or does not
have a mail system running right now.

Your message was not delivered within 1 days:
Mail server 116.3.148.74 is not responding.

The following recipients did not receive this message:
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Please reply to postmaster at mozilla.org
if you feel this message to be in error.

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From snail at objmedia.demon.co.uk  Sat Feb  5 10:51:34 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Sat, 5 Feb 2005 15:51:34 +0000
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
References: <ctsjmg$75p$1@usenet.otenet.gr>
	<pan.2005.02.03.19.10.39.349763@jerf.org>
	<cu2m3q$km1$1@usenet.otenet.gr>
Message-ID: <pXQ1YUGGuOBCFwee@objmedia.demon.co.uk>

In message <cu2m3q$km1$1 at usenet.otenet.gr>, Ilias Lazaridis 
<ilias at lazaridis.com> writes
>[I like to avoid interaction with google.]

Well, use a different search engine.

>I've not evaluated Java.

That is strange - the title of this thread indicates that you have 
evaluated Java. You have posted similar threads in comp.lang.ruby and 
comp.lang.java.*.

You are a troll.

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From tim.peters at gmail.com  Sat Feb 12 19:05:28 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Sat, 12 Feb 2005 19:05:28 -0500
Subject: Hack with os.walk()
In-Reply-To: <200502120000.12086.frans.englich@telia.com>
References: <200502120000.12086.frans.englich@telia.com>
Message-ID: <1f7befae05021216052c742a14@mail.gmail.com>

[Frans Englich]
...
> My problem, AFAICT, with using os.walk() the usual way, is that in order to
> construct the /hierarchial/ XML document, I need to be aware of the directory
> depth, and a recursive function handles that nicely; os.walk() simply
> concentrates on figuring out paths to all files in a directory, AFAICT.

walk() does a pre- (default) or post-order traversal of a directory
tree; that's it.

> I guess I could solve it with using os.walk() in a traditional way, by somehow
> pushing libxml2 nodes on a stack, after keeping track of the directory levels
> etc(string parsing..). Or, one could write ones own recursive directory
> parser..
>
> My question is: what is the least ugly? What is the /proper/ solution for my
> problem? How would you write it in the cleanest way?

Well, it's enough just to keep a dict mapping directory path to
directory object.  That doesn't require parsing anything.  For
example, here are some dumb base classes (not XML -- the XML part
distracts from the essence for me):

class HasPath:
    def __init__(self, path):
        self.path = path

    def __lt__(self, other):
        return self.path < other.path

class Directory(HasPath):
    def __init__(self, path):
        HasPath.__init__(self, path)
        self.files = [] # list of File objects
        self.subdirs =  [] # list of sub-Directory objects

class File(HasPath):
    pass

Then a generic build_tree function.  It accepts optional arguments to
specify factory functions for creating directory and file objects. 
The guts require that a directory object have .path, .files and
.subdirs attributes; you probably want to season to taste, to require
XML-ish spellings.  It returns a directory-ish object, representing
the path passed to it:

def build_tree(path, Directory=Directory, File=File):
    top = Directory(path)
    path2dir = {path: top}
    for root, dirs, files in os.walk(path):
        dirobj = path2dir[root]
        for name in dirs:
            subdirobj = Directory(os.path.join(root, name))
            path2dir[subdirobj.path] = subdirobj
            dirobj.subdirs.append(subdirobj)
        for name in files:
            dirobj.files.append(File(os.path.join(root, name)))
    return top

That looks short and sweet to me.  It could be made shorter, but not
without losing clarity to my eyes.

As a concrete example, here's a subclass of Directory (to be passed as
the Directory factory to build_tree) with a display() method that
dumps a sensibly indented listing of the tree; note that sort() gets
the intended order via the inherited HasPath.__lt__() implementation:

class ListingDirectory(Directory):
    # Display directory tree as a tree, with 4-space indents.
    # Files listed before subdirectories, both in alphabetical order.
    # Full path displayed for topmost directory, base names for all
    # other entries.  Directories listed with trailing os.sep.
    def display(self, level=0):
        self.subdirs.sort()
        self.files.sort()
        name = self.path
        if level:
            name = os.path.basename(name)
        print "%s%s%s" % (' ' * level, name, os.sep)
        for f in self.files:
            print "%s%s" % (' ' * (level + 4),
                            os.path.basename(f.path))
        for d in self.subdirs:
            d.display(level + 4)


From usenet_spam at janc.invalid  Sun Feb 13 23:11:05 2005
From: usenet_spam at janc.invalid (JanC)
Date: Mon, 14 Feb 2005 04:11:05 GMT
Subject: For American numbers
References: <420e7376$1@nntp0.pdx.net> <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
	<%DBPd.10409$Lf6.440348@phobos.telenet-ops.be>
	<sYSdnX7Zq4NGwZLfRVn-uA@powergate.ca>
Message-ID: <Xns95FD34BE57C77JanC@213.118.38.125>

Peter Hansen schreef:

> Given the clear "units='bytes'" default above, and my restricting
> my comments to "the rest of the computer world", it should be
> clear I was talking about a very limited subset of the planet.
> 
> A subset, however, which has an extremely strong attachment to
> 1024 instead of 1000 (for very good reasons), and which is
> less likely to abandon backwards compatibility and widely accept
> 1000 than the US is likely to adopt metric widely in the near
> future...

The problem is that that 'subset' uses kilo for both 1000 (at least hard 
disks & some network transmission speeds) and 1024 in computer science.


-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From ncoghlan at iinet.net.au  Sat Feb  5 10:49:28 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 06 Feb 2005 01:49:28 +1000
Subject: empty classes as c structs?
In-Reply-To: <1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<7rSdne7BcbDeV57fRVn-jg@comcast.com>	<mailman.1963.1107594941.22381.python-list@python.org>
	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>
Message-ID: <4204EB08.1030405@iinet.net.au>

Alex Martelli wrote:
> Nick Coghlan <ncoghlan at iinet.net.au> wrote:
>    ...
> 
>>Michael Spencer also posted an interesting idea recently about setting up
>>a view of an existing dictionary, rather than as a separate object:
>>
>>class attr_view(object):
>>   def __init__(self, data):
>>     object.__setattr__(self, "_data", data)
>>   def __getattr__(self, attrname):
>>     return self._data[attrname]
>>   def __setattr__(self, attrname, value):
>>     self._data[attrname] = value
> 
> 
> Wasted indirection, IMHO.  A better implementation:
> 
> class attr_view(object):
>     def __init__(self, data):
>         self.__dict__ = data
> 
> 
> Alex

Yeah, I caught your comment in the other thread. It was something I'd wondered 
about, but never followed up .

And any time you want real dictionary behaviour, a quick call to "vars(x)" will 
do nicely.

I think the idea definitely deserves mention as a possible implementation 
strategy in the generic objects PEP, with the data argument made optional:

class namespace(object):
     def __init__(self, data=None):
         if data is not None:
              self.__dict__ = data
     # Remainder as per Bunch in the PEP. . .

Py> result = namespace()
Py> result.x = 1
Py> result.y = 2
Py> vars(result)
{'y': 2, 'x': 1}
Py> gbls = namespace(globals())
Py> gbls.result
<__main__.namespace object at 0x00B2E370>
Py> gbls.result.x
1
Py> gbls.result.y
2
Py> gbls.gbls
<__main__.namespace object at 0x00B2E410>

This does mean construction using keywords or a sequence of pairs requires an 
extra call to dict() at the invocation point. However, it means that the class 
can also be used to manipulate an existing dictionary, which the current PEP 
version doesn't allow.

namespace(existing_dict) would mean that the namespace should manipulate the 
original dictionary.

namespace() would create a new, initially empty, dict to work on.

namespace(dict(<whatever>)) would create a new, non-empty, dict based on the 
standard arguments to the dictionary constructor.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From dbeech at bigpond.net.au  Thu Feb 10 04:15:01 2005
From: dbeech at bigpond.net.au (Dave Beech)
Date: Thu, 10 Feb 2005 19:45:01 +1030
Subject: Python-list Digest, Vol 13, Issue 85
References: <20041005200537.9AE831E401B@bag.python.org>
Message-ID: <03e101c50f51$0481a4e0$0100000a@vic.bigpond.net.au>


----- Original Message -----
From: <python-list-request at python.org>
To: <python-list at python.org>
Sent: Wednesday, October 06, 2004 6:35 AM
Subject: Python-list Digest, Vol 13, Issue 85


> Send Python-list mailing list submissions to
> python-list at python.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://mail.python.org/mailman/listinfo/python-list
> or, via email, send a message with subject or body 'help' to
> python-list-request at python.org
>
> You can reach the person managing the list at
> python-list-owner at python.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Python-list digest..."
>


----------------------------------------------------------------------------
----


> Today's Topics:
>
>    1. Re: New to Python: Features (Grant Edwards)
>    2. Re: Python Macros (Jeff Shannon)
>    3. Re: Python Macros (Lonnie Princehouse)
>    4. [ANN] PySQLite 1.0 (Gerhard Haering)
>    5. Python concatenation Question problem (Kory Wheatley)
>    6. Re: re bug (Gustavo Niemeyer)
>    7. Re: Data/File Structure and Algorithm for Retrieving Sorted
>       Data Chunk Efficiently (William Park)
>    8. Re: [ANN] PySQLite 1.0 (Irmen de Jong)
>    9. Retrieving the full path of Unix apps (Lorin Hochstein)
>   10. Re: New to Python: Features (Alex Drummond)
>   11. Re: New to Python: Features (Neuruss)
>


----------------------------------------------------------------------------
----


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




From fredrik at pythonware.com  Mon Feb 14 16:27:21 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 22:27:21 +0100
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr><1108411017.507814.229600@c13g2000cwb.googlegroups.com><mailman.2562.1108412196.22381.python-list@python.org>
	<1108413376.110181.240600@o13g2000cwo.googlegroups.com>
Message-ID: <cur4up$rlm$1@sea.gmane.org>

"Pat" wrote:

> A few things.  Primarily the fact that I'm not very experienced in C
> (the extensions that I need to have compiled are not written by me).
> Secondarily, the fact that the discussion threads I read made it seem
> much more complicated than what you just described.

from two posts at the top of this thread:

    "Writing a setup.py and running
        python setup.py build_ext --compiler=mingw32
    works for me *without* any more work. Things can't get much
    simpler."

and

    "The mingw compiler *is* supported through distutils. distutils
    can straightforwardly be configured to build extensions with
    mingw."

(now go read Ilias replies to those posts)

> Third, the fact that some of the code we've tried to compile didn't compile
> cleanly, the way your cElementTree did (but I can't remember what exactly
> the problem was and I didn't do the compiling).

was that code tested under gcc?  code that compiles under visual C doesn't
necessarily compile silently under gcc, but fixing that is usually pretty trivial
(no worse than porting mostly portable code between platforms).

> And, finally, an aversion to trial-and-error solutions.  I prefer to Google and
> ask questions when I'm out of my element.

sure didn't sound that way when you entered this thread:

    "So in an effort to make some headway, I'm going to try to summarize the
    current state of affairs.  The bottom line is that compiling C extension modules
    on the Windows platform for Python 2.4 is, today, a royal pain in the ass.
    Period.  Here's why. /.../"

now go download MinGW and figure out what's wrong with your C code.
if you get stuck, post the error messages, and I'm sure some c.l.pythoneer
will help you sort it out.

</F> 





From rbt at athop1.ath.vt.edu  Wed Feb 16 14:43:11 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Wed, 16 Feb 2005 14:43:11 -0500
Subject: more os.walk() issues... probably user error
In-Reply-To: <42137b28$1_3@newspeer2.tds.net>
References: <cuvr5b$2ei$1@solaris.cc.vt.edu> <cuvsmi$4bb$1@solaris.cc.vt.edu>
	<42137b28$1_3@newspeer2.tds.net>
Message-ID: <4213A24F.1020209@athop1.ath.vt.edu>

Kent Johnson wrote:
> rbt wrote:
> 
>> rbt wrote:
>>
>>> This function is intended to remove unwanted files and dirs from 
>>> os.walk(). It will return correctly *IF* I leave the 'for fs in 
>>> fs_objects' statement out (basically leave out the entire purpose of 
>>> the function).
>>>
>>> It's odd, when the program goes into that statment... even when only 
>>> a 'pass', and nothing else is present, nothing is returned. Why is 
>>> that? I'm testing Python 2.4 on Linux x86 and WinXP. Results are the 
>>> same on either platform.
>>>
>>>     def build_clean_list(self, path):
>>>
>>>         file_skip_list = ['search_results.txt']
>>>         dir_skip_list = ['dev', 'proc', 'Temporary Internet Files']
>>>
>>>         fs_objects = os.walk(path, topdown=True)
> 
> 
> fs_objects is a generator, not a list. This loop is exhausting 
> fs_objects, so when you return fs_objects is at the end of iteration, 
> there is nothing left.

That makes sense. Thanks for the explanation. I've never used generators 
before.

> 
>>> ##      for fs in fs_objects:
>>> ##
>>> ##            for f in fs[2]:
>>> ##                if f in file_skip_list:
>>> ##                    print f
>>> ##                    fs[2].remove(f)
>>> ##
>>> ##            for d in fs[1]:
>>> ##                if d in dir_skip_list:
>>> ##                    print d
>>> ##                    fs[1].remove(d)
> 
> 
> Add this here:
>                  yield fs
> 
> and take out the return. This turns build_clean_list() into a generator 
> function and you will be able to iterate the result.

I'll try this.

Will the changes I made (file and dir removals from os.walk()) be 
reflected in the generator object? Is it safe to remove objects this way 
and pass the results in a generator on to another function? Sorry for 
all the questions, I just like to fully understand something before I 
start doing it with confidence.

rbt


> 
> Kent
> 
>>>
>>>         return fs_objects
>>>
>>>
>>
>> Just to clarify, it's wrong of me to say that 'nothing is returned'... 
>> in either case, this is what is returned:
>>
>> Here's what was returned and its type:
>> ----------------------------------------
>> <generator object at 0x407dbe4c>
>> <type 'generator'>
>> ----------------------------------------
>>
>> But, I can't iterate over the returned object when I descend into the 
>> for statement I mentioned above.
>>


From jeff at ccvcorp.com  Wed Feb 16 13:07:11 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Wed, 16 Feb 2005 10:07:11 -0800
Subject: [newbie]How to install python under DOS and is there any
 Wxpython can be installed under dos?
In-Reply-To: <b9-dnTQOwoYK647fRVn-2Q@rogers.com>
References: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
	<1108557065.547230.254540@z14g2000cwz.googlegroups.com>
	<b9-dnTQOwoYK647fRVn-2Q@rogers.com>
Message-ID: <11172sa1sg2svc8@corp.supernews.com>

john san wrote:

> Just want to show "windows" under dos without MsWindows. Also find some
> difficulty to simply install WxPython under directory(DOS) and then run,
> which is very good thing if it is just like Java.

I don't think you'll have any luck finding wxPython for DOS.  A bit of 
a looksee around the wxWidgets website (wxPython is a wrapper for 
wxWidgets) mentions being available for Win3.1 and up, as well as 
various levels of *nix installs (wxGTK, wxMotif, wxX11), but no 
mention of DOS.  I suppose that a very ambitious person could perhaps 
get the wxUniversal port to run on DOS, but I presume that this would 
be far from trivial.

On the other hand, you probably could find and/or create some sort of 
basic text-only windowing library.  It won't be wxPython, nor anything 
even close to that level of sophistication, but that's what happens 
when you insist on using an OS that's been obsolete for a decade or 
more. ;)

Jeff Shannon
Technician/Programmer
Credit International



From Scott.Daniels at Acm.Org  Wed Feb 23 09:44:43 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Wed, 23 Feb 2005 06:44:43 -0800
Subject: assert 0, "foo" vs. assert(0, "foo")
In-Reply-To: <pan.2005.02.23.09.57.43.578480@thomas-guettler.de>
References: <pan.2005.02.23.09.57.43.578480@thomas-guettler.de>
Message-ID: <421c92bc$1@nntp0.pdx.net>

Thomas Guettler wrote:
> Hi,
> 
> Python 2.3.3 (#1, Feb  5 2005, 16:22:10) [GCC 3.3.3 (SuSE Linux)] on linux2
> 
>>>>assert 0, "foo"
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AssertionError: foo
> 
>>>>assert(0, "foo")
>>>>
> 
> 
> If you use parenthesis for the assert statement, it never
> raises an exception.
> 
> Up to now I raised strings, but since this is deprecated,
> I switched to use the second argument for the assert
> statement.
> 
> Is it possible to change future python versions, that
> assert accept parenthesis?
You are confusing assert with raise.

     assert test, text

behaves like:

     if __debug__ and test:
         raise AssertionError, text

As far as raise goes, where you have been writing:

     raise "some complaint"

you could simply use:

     raise ValueError, "some complaint"

or:

     raise ValueError("some complaint")

--Scott David Daniels
Scott.Daniels at Acm.Org


From mwm at mired.org  Sun Feb 13 16:57:43 2005
From: mwm at mired.org (Mike Meyer)
Date: Sun, 13 Feb 2005 15:57:43 -0600
Subject: For American numbers
References: <420e7376$1@nntp0.pdx.net> <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
	<mailman.2474.1108266888.22381.python-list@python.org>
Message-ID: <86zmy85dig.fsf@guru.mired.org>

Nick Coghlan <ncoghlan at iinet.net.au> writes:

> Peter Hansen wrote:
>> Only for hard drive manufacturers, perhaps.
>> For the rest of the computer world, unless I've missed
>> a changing of the guard or something, "kilo" is 1024
>> and "mega" is 1024*1024 and so forth...
>
> Given that there are perfectly good ISO prefixes for the multiples of
> 2**10, I don't see any reason to continue misusing the 10**3 prefixes
> for the purpose.

>From what I found <URL: http://physics.nist.gov/cuu/Units/binary.html
>, it's not clear those are ISO prefixes yet - but they have been
adapted by some standards agencies. 

Possibly you have better references?

         <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From nospam at me.invalid  Sun Feb  6 13:29:34 2005
From: nospam at me.invalid (anthonyberet)
Date: Sun, 06 Feb 2005 18:29:34 +0000
Subject: newbie wants to compile python list of filenames in selected
	directories
Message-ID: <36n60uF520lfaU1@individual.net>

Hi, I am new at Python, and very rusty at the one language I was good 
at, which was BASIC.

I want to write a script to compare filenames in chosen directories, on 
windows machines. Ideally it would compose a list of strings of all the 
filenames in the directories, and those directories would be chosable by 
the user of the script.

I am quite happy to do my own legwork on this , I realise it is simple 
stuff, but can anyone point me in the right direction to start?

Thanks


From sjmachin at lexicon.net  Fri Feb 18 19:52:46 2005
From: sjmachin at lexicon.net (John Machin)
Date: 18 Feb 2005 16:52:46 -0800
Subject: exercise: partition a list by equivalence
In-Reply-To: <mailman.2819.1108771744.22381.python-list@python.org>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<mailman.2803.1108743668.22381.python-list@python.org>
	<1108768870.455974.244590@c13g2000cwb.googlegroups.com>
	<mailman.2819.1108771744.22381.python-list@python.org>
Message-ID: <1108774366.122896.293720@l41g2000cwc.googlegroups.com>


John Lenton wrote:
> On Fri, Feb 18, 2005 at 03:21:10PM -0800, John Machin wrote:
> > Not robust in the face of input like:
> > [[1,1]]
> > or
> > [[1,2], [1,2]]
> > or
> > [[1,2], [2,1]]
> > or
> > [[1,2], [2,3], [3,1]]
>
> oops, my bad.
>
> >
> > needs "if first == second: continue" here
> >
> > >             if has_first and has_second:
> >
> > needs "if rev[first] == rev[second]: continue" here
>
> an 'is' is enough, and better.

Good point. You're redeeming yourself :-)

>
> > >                 rev[first].extend(rev[second])
> > >                 rev[second][:] = []
> > >                 rev[second] = rev[first]
> > >             elif has_first:
> > >                 rev[first].append(second)
> > >                 rev[second] = rev[first]
> > >             elif has_second:
> > >                 rev[second].append(first)
> > >                 rev[first] = rev[second]
> > >             else:
> > >                 copy = [first, second]
> > >                 res.append(copy)
> >
> > My reaction to the "magic" by which res grows was "omigod that's
the
> > most horrible thing I've seen for quite a while" but there was
worse to
> > come :-)
>
> what is magic about it? is it really that horrible?

Try explaining to the newbies over on the tutor list how despite "res"
only ever *explicitly* having little bits like [3, 4] appended to it,
it (or more properly the thing to which it refers) is actually
festering and growing and being mutated under the surface until at the
finale it bursts out dripping slime just like the creature from the
black lagoon ...



From nytimes at swiftdsl.com.au  Thu Feb 17 09:08:03 2005
From: nytimes at swiftdsl.com.au (news.sydney.pipenetworks.com)
Date: Fri, 18 Feb 2005 01:08:03 +1100
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <mailman.2744.1108629122.22381.python-list@python.org>
References: <37hippF4gcimiU1@individual.net><qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com><37hqlrF59l2b2U1@individual.net><873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>	<421450CC.9080504@swiftdsl.com.au>
	<mailman.2744.1108629122.22381.python-list@python.org>
Message-ID: <4214A543.2000006@swiftdsl.com.au>

Fredrik Lundh wrote:
> "news.sydney.pipenetworks.com" wrote:
> 
> 
>>>Nick "Explicit is better than Implicit"
>>
>>Really ? Then why are you using python. Python or most dynamic languages are are so great because 
>>of their common sense towards the "implicit". You must have heard of "never say never" but "never 
>>say always" (as in "always better") is more appropriate here. There are many cases of python's 
>>implicitness.
> 
> 
> a certain "princess bride" quote would fit here, I think.

I'm not really familiar with it, can you enlighten please.

>>What about
>>
>>a = "string"
>>b = 2
>>c = "%s%s" % (a, b)
>>
>>There is an implicit str(b) here.
> 
> 
> nope.   it's explicit: %s means "convert using str()".

ok you got me there, although it must be bad practice compared to

c = "%s%d" % (a, b)

because this is much more explicit and will tell you if b is ever 
anything other then an integer even though you may not care.

> from the documentation:
> 
>           %s     String (converts any python object using str()).
> 
> 
>>''.join(["string", 2]) to me is no different then the example above.
> 
> 
> so where's the "%s" in your second example?
> 
> </F> 

I'm not sure if this has been raised in the thread but I sure as heck 
always convert my join arguments using str(). When does someone use 
.join() and not want all arguments to be strings ? Any examples ?

Regards,

Huy



From mwm at mired.org  Sat Feb 12 22:33:40 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 12 Feb 2005 21:33:40 -0600
Subject: Text files read multiple files into single file, and then
 recreate the multiple files
References: <1108250252.479092.298670@z14g2000cwz.googlegroups.com>
	<420e90fb$0$28978$e4fe514c@news.xs4all.nl>
	<1108251619.636256.85030@z14g2000cwz.googlegroups.com>
Message-ID: <86d5v56smj.fsf@guru.mired.org>

googlinggoogler at hotmail.com writes:

> Would like to use text files, its really for my own learning,
>
> but I suppose a Zip would work 

How about outputing a file as:

LENGTH=######
<file-contents>

in your joined file? That's a minimalistic archive format - one ASCII
header line that provides just enough information to extract the
file. Be sure to open all files [rw]b, though.

      <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From sjmachin at lexicon.net  Tue Feb  8 13:19:32 2005
From: sjmachin at lexicon.net (John Machin)
Date: 8 Feb 2005 10:19:32 -0800
Subject: ANN: Zeus Programmers Editor V3.94
In-Reply-To: <mailman.2186.1107874124.22381.python-list@python.org>
References: <4207843C.26FB@zeusedit.com>
	<mailman.2186.1107874124.22381.python-list@python.org>
Message-ID: <1107886772.595845.172190@c13g2000cwb.googlegroups.com>


Gabriel Cooper wrote:
> Jussi Jumppanen wrote:
>
> >The latest release of the Zeus for Windows programmer's
> >editor is now available.
> >
> So is this mentioned here on the Python mailing list because Zeus was

> written in Python, or is this just targeted spam for a commerical
product?

Targeted like William Tell's arrow; the features page says "Built in
spell checker".



From caleb1 at telkomsa.net  Tue Feb  8 23:07:09 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Tue, 08 Feb 2005 23:07:09 -0500
Subject: Loop in list.
References: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
Message-ID: <opslwwd7g71js0xs@news.telkomsa.net>

Jim

Someone on this list (SteveB) helped me quite a bit with a list  
comprehension on a recent thread.  Roy said it can be hard to read, and I  
agree in part because I always thought they were hard to read, when in  
actual fact I had just never bothered to learn properly.  Here is a  
mini-tutorial:

e.g. 1: The theory

'>>> a = [ <item1> for i in <item2> ]

item2 is iterable (like "range()" in your example)
item1 is the thing that is going to fill up the resulting list, and item1  
is evaluated at each step of the "for" loop.

This is the same as
'>>> a = []
'>>> for i in <item2>:
'>>>     a.append(<item1>)

e.g. 2: A real example

'>>> a = [i*2 for i in range(3)]
'>>> a
[0, 2, 4]

so "i*2" gets evaluated for each step in the "for" loop.  The values of  
"i" at each step are [0,1,2], according to how "range" works, so "i*2" is  
what you end up with in the resulting list.

e.g. 3: They can be nested

'>>> a = [i*2*b for i in range(3) for b in range(4)]
'>>> a
[0, 0, 0, 0, 0, 2, 4, 6, 0, 4, 8, 12]

Might take you a while to correlate the answer with the loop, but you  
should be able to see after a while that this nesting is the same as

'>>> a = []
'>>> for b in range(4):
'>>>     for i in range(3):
'>>>         a.append(i*2*b)

keep well
Caleb




From b.hall at irl.cri.nz  Tue Feb 22 19:31:12 2005
From: b.hall at irl.cri.nz (Blair Hall)
Date: Wed, 23 Feb 2005 13:31:12 +1300
Subject: compatbility of .pyc files
Message-ID: <421BCED0.2070206@irl.cri.nz>

I have a requirement to prevent 'accidental' tampering
with some software written in Python. If I ensure that all
of the modules concerned are compiled into .pyc's, and remove
the .py's to another location, then I should be safe until
the next upgrade of the Python interpretter.

My questions:

Are the .pyc's usable without recompilation between 'minor'
releases of the interpretter (e.g., 2.3.1 -> 2.3.2 -> etc)?

I presume that the .pyc's are NOT compatible
across more major releases (e.g., 2.3.x -> 2.4.x)?

Is there a hard and fast rule about compatibility across
releases that I can rely on?



From madsurfer2000 at hotmail.com  Sat Feb 26 11:37:52 2005
From: madsurfer2000 at hotmail.com (madsurfer2000 at hotmail.com)
Date: 26 Feb 2005 08:37:52 -0800
Subject: cgi: getting at raw POST data?
In-Reply-To: <421fbaf9$1@nntp.zianet.com>
References: <421fbaf9$1@nntp.zianet.com>
Message-ID: <1109435872.032671.285260@f14g2000cwb.googlegroups.com>

Erik Johnson wrote:
> I am trying to work with a program that is trying make an HTTP POST
of text
> data without any named form parameter. (I don't know - is that a
normal
> thing to do?) I need to write a CGI program that accepts and
processes that
> data. I'm not seeing how to get at data that's not a named form
parameter.
>

Got this from a quick search with Google. Haven't tried it, but it
looks like it does what you want.

http://mail.python.org/pipermail/python-list/2002-September/122977.html



From das69 at et.byu.edu  Tue Feb  1 14:30:25 2005
From: das69 at et.byu.edu (Dan Smyth)
Date: Tue, 1 Feb 2005 12:30:25 -0700
Subject: (no subject)
Message-ID: <002a01c50894$7d00beb0$6671080a@et.byu.edu>

Hey,

I'm trying to compile python 2.4 on an SGI machine.  The configure program shot back this error and told me to post it to the Python lists.  Anyone know what's going on?

configure: WARNING: stropts.h: present but cannot be compiled
configure: WARNING: stropts.h:     check for missing prerequisite headers?
configure: WARNING: stropts.h: see the Autoconf documentation
configure: WARNING: stropts.h:     section "Present But Cannot Be Compiled"
configure: WARNING: stropts.h: proceeding with the preprocessor's result
configure: WARNING: stropts.h: in the future, the compiler will take precedence
configure: WARNING:     ## --------------------------------- ##
configure: WARNING:     ## Report this to the python lists.  ##
configure: WARNING:     ## --------------------------------- ##

Dan Smyth

Dan Gaidin -- Tai Shar Phoenix
"Dovie'andi se tovya sagain"
-------------- next part --------------
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From garabik at kassiopeia.juls.savba.sk  Fri Feb 25 08:49:42 2005
From: garabik at kassiopeia.juls.savba.sk (Radovan Garabik)
Date: 25 Feb 2005 13:49:42 GMT
Subject: ANN: T602Parser 0.1
Message-ID: <mailman.3052.1109342473.22381.python-announce-list@python.org>

Text602 was a very popular word processor for IBM PC MS DOS 
compatibles, used in Czechoslovakia. T602Parser provides a 
simple class modelled after HTMLParser that can be used to 
parse Text602 documents (MS DOS version, not Win602) and 
to extract/convert data contained in them.

Version: 0.1 (initial release)
Author: Radovan Garab?k 
License: GPL
URL: http://kassiopeia.juls.savba.sk/~garabik/software/602/


-- 
 -----------------------------------------------------------
| Radovan Garab?k http://melkor.dnp.fmph.uniba.sk/~garabik/ |
| __..--^^^--..__    garabik @ kassiopeia.juls.savba.sk     |
 -----------------------------------------------------------
Antivirus alert: file .signature infected by signature virus.
Hi! I'm a signature virus! Copy me into your signature file to help me spread!


From mefjr75 at hotmail.com  Fri Feb  4 14:46:33 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 4 Feb 2005 11:46:33 -0800
Subject: OT: why are LAMP sites slow?
In-Reply-To: <11076nqn1ats421@corp.supernews.com>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
	<7xy8e5jagh.fsf@ruckus.brouhaha.com>
	<1107490052.542546.285950@c13g2000cwb.googlegroups.com>
	<11076nqn1ats421@corp.supernews.com>
Message-ID: <1107546393.106014.149290@g14g2000cwa.googlegroups.com>

Jeffery Froman wrote:
> One caveat here -- I don't believe you can (should) nest
> a <div> inside a
> <span>, or for that matter, nest any block-level element
> inside an inline element.

Jeffrey,
Actually I have not shown that in the example.
But for the sake of clarity, I am glad you mentioned it.
Overall I agree with your statement you *should* not nest div inside of
span, BUT...
Div *can* be nested inside a span. I just tried it in Firefox , I.E. ,
and Opera to be sure and it does work ;)
Probably not w3c compliant though.
M.E.Farmer



From pipedreamergrey at gmail.com  Tue Feb 22 16:51:58 2005
From: pipedreamergrey at gmail.com (PipedreamerGrey)
Date: 22 Feb 2005 13:51:58 -0800
Subject: Py2Exe Import Error
Message-ID: <1109109118.808024.109810@f14g2000cwb.googlegroups.com>

I'm trying to create a standalone version (.exe) of PythonCard's Custdb
sample using Py2Exe version 0.5.0.  Everytime I attempt to compile the
program, I get an error during compilation.  This is the exact code I'm
using in the setup file:

from distutils.core import setup
import py2exe
setup( name = "custdb",
       console = ["custdb.py"],
       data_files = [ (".", ["custdb.ini", "custdb.de.rsrc.py",
"custdb.rsrc.py", "customerdata.csv"]) ]
       )

This is the error message I get when I run custdb.exe:

Traceback (most recent call last):
  File "custdb.py", line 202, in ?
    app = model.Application(CustDbStack)
  File "PythonCard\model.pyc", line 337, in __init__
  File "PythonCard\resource.pyc", line 48, in getResource
  File "PythonCard\resource.pyc", line 86, in __init__
  File "PythonCard\resource.pyc", line 91, in __init__
  File "PythonCard\resource.pyc", line 91, in __init__
  File "PythonCard\resource.pyc", line 96, in __init__
  File "PythonCard\resource.pyc", line 139, in enforceSpec
  File "PythonCard\resource.pyc", line 30, in loadComponentModule
ImportError: cannot import module 'radiogroup

When I add "radiogroup" to the imports at the top of custdb.py, I get
this error message:

Traceback (most recent call last):
  File "custdb.py", line 18, in ?
ImportError: cannot import name radiogroup

This is line 18 in Custdb.py: from PythonCard import dialog, model,
radiogroup



From dieter at handshake.de  Mon Feb 21 14:02:41 2005
From: dieter at handshake.de (Dieter Maurer)
Date: 21 Feb 2005 20:02:41 +0100
Subject: unicode encoding usablilty problem
References: <opsmekm2ei6yt6e7@news.cisco.com>
	<mailman.2811.1108751132.22381.python-list@python.org>
	<opsmepfmcx6yt6e7@news.cisco.com>
	<mailman.2839.1108835032.22381.python-list@python.org>
Message-ID: <x7bradvir2.fsf@handshake.de>

"Fredrik Lundh" <fredrik at pythonware.com> writes on Sat, 19 Feb 2005 18:44:27 +0100:
> "aurora" <aurora00 at gmail.com> wrote:
> 
> > I don't want to mix them. But how could I find them? How do I know this  statement can be 
> > potential problem
> >
> >   if a==b:
> >
> > where a and b can be instantiated individually far away from this line of  code that put them 
> > together?

I do understand aurora's problems very well.

Me, too, I had suffered from this occasionally:

   * some library decides to use unicode (without I had asked it to do so)

   * Python decides then to convert other strings to unicode
     and bum: "Unicode decode error".

I solve these issues with a "sys.setdefaultencoding(ourDefaultEncoding)"
in "sitecustomize.py".

I know that almost all the characters I have to handle
are encoded in "ourDefaultEncoding" and if something
converts to Unicode without being asked for, then this
is precisely the correct encoding.

I know that Unicode fanatists do not like "setdefaultencoding"
but until we will have completely converted to Unicode (which we probably
will do in the farer future), this is essential to keep sane...


Dieter


From jaydonnell at gmail.com  Wed Feb  9 12:19:40 2005
From: jaydonnell at gmail.com (jdonnell)
Date: 9 Feb 2005 09:19:40 -0800
Subject: PHP Embedded In Python
In-Reply-To: <1107962008.512216.314990@f14g2000cwb.googlegroups.com>
References: <1107814685.908990.58410@z14g2000cwz.googlegroups.com>
	<1107818262.741563.266050@c13g2000cwb.googlegroups.com>
	<1107872763.019447.281670@c13g2000cwb.googlegroups.com>
	<1107899088.967746.48530@g14g2000cwa.googlegroups.com>
	<1107962008.512216.314990@f14g2000cwb.googlegroups.com>
Message-ID: <1107969580.130936.275570@z14g2000cwz.googlegroups.com>

Ok, I'm still a little confused. You mention header.html and
access.php.

For access.php use the os call. You'll probably want to use popen, and
you also need to change your php script slightly. In order to run php
scripts from the command line you have to put
#!/usr/bin/php
as the first line in the php script. You then need to make sure that
it's executable. Run this from the command line:
chmod 755 access.php
Now you can call it from python with os.popen('/path/to/access.php')



From martin at v.loewis.de  Sun Feb 20 04:50:30 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 20 Feb 2005 10:50:30 +0100
Subject: unicode encoding usablilty problem
In-Reply-To: <d5uxzk7q.fsf@python.net>
References: <opsmekm2ei6yt6e7@news.cisco.com>
	<42164d01$0$4676$9b622d9e@news.freenet.de>
	<d5uxzk7q.fsf@python.net>
Message-ID: <42185D66.1020203@v.loewis.de>

Thomas Heller wrote:
> Is it possible to specify a byte string literal when running with the -U option?

Not literally. However, you can specify things like

bytes = [0x47, 0x49, 0x4f, 0x50, 0x01, 0x00]
bytes = ''.join((chr(x) for x in bytes))

Alternatively, you could rely on the 1:1 feature of Latin-1:

bytes = "GIOP\x01\0".encode("l1")

Regards,
Martin


From farcepest at gmail.com  Fri Feb 11 12:03:47 2005
From: farcepest at gmail.com (Andy Dustman)
Date: 11 Feb 2005 09:03:47 -0800
Subject: Performance Issues of MySQL with Python
In-Reply-To: <1108096342.787772.269670@f14g2000cwb.googlegroups.com>
References: <1107954472.246556.258030@g14g2000cwa.googlegroups.com>
	<1108096342.787772.269670@f14g2000cwb.googlegroups.com>
Message-ID: <1108141427.333215.291890@f14g2000cwb.googlegroups.com>

Well, it does more than that. It converts each column from a string
(because MySQL returns all columns as strings) into the appropriate
Python type. Then you were converting all the Python types back into
strings. So it's no mystery that using the command line client is
faster, since it would take the string results and write them out
directly. (I assume it does this; there's no rational reason for it to
do otherwise.)



From jeff at ccvcorp.com  Tue Feb  8 21:12:32 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Tue, 08 Feb 2005 18:12:32 -0800
Subject: interactive execution
In-Reply-To: <42096A7A.2D8CF4E1@yahoo.com>
References: <42096A7A.2D8CF4E1@yahoo.com>
Message-ID: <110isa55vfvhr79@corp.supernews.com>

Jive Dadson wrote:

> How does one execute arbitrary text as code within a module's context?
> 
> I've got some code that compiles some text and then executes it.  When
> the string is "print 'Hello'", it prints "Hello".  I get no exception
> when I compile and execute "foo = 555".  If I then compile and exec
> "print foo", I get a name error. The variable foo is undefined. My
> assumption is that the "exec" command created a new namespace, put "foo"
> in that namespace, and then threw the namespace away.  Or something.

You can do

    exec codestring in globaldict, localdict

(Or something like that, this is from unused memory and is untested.) 
  The net effect is that exec uses the subsequent dictionaries as its 
globals and locals, reading from and writing to them as necessary.

(Note that this doesn't get you any real security, because malicious 
code can still get to __builtins__ from almost any object...)

Jeff Shannon
Technician/Programmer
Credit International



From http  Sat Feb 12 16:57:33 2005
From: http (Paul Rubin)
Date: 12 Feb 2005 13:57:33 -0800
Subject: multi threading in multi processor (computer)
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<420a2938$0$22987$626a14ce@news.free.fr>
	<1107964587.818199.223980@g14g2000cwa.googlegroups.com>
	<mailman.2254.1107966236.22381.python-list@python.org>
Message-ID: <7xr7jlwieq.fsf@ruckus.brouhaha.com>

John Lenton <john at grulic.org.ar> writes:
> and buying more, cheap computers gives you more processing power than
> buying less, multi-processor computers. 

The day is coming when even cheap computers have multiple cpu's.
See hyperthreading and the coming multi-core P4's, and the finally
announced Cell processor.

Conclusion: the GIL must die.


From francis.girard at free.fr  Mon Feb  7 16:28:03 2005
From: francis.girard at free.fr (Francis Girard)
Date: Mon, 7 Feb 2005 22:28:03 +0100
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <6sidnS8u8dgsUJrfRVn-2w@comcast.com>
References: <dvOMd.33656$EG1.19314@lakeread04>
	<mailman.2105.1107807115.22381.python-list@python.org>
	<6sidnS8u8dgsUJrfRVn-2w@comcast.com>
Message-ID: <200502072228.04018.francis.girard@free.fr>

Le lundi 7 F?vrier 2005 21:21, Steven Bethard a ?crit?:
> Francis Girard wrote:
> > Le lundi 7 F?vrier 2005 20:30, Steven Bethard a ?crit :
> >>especially since I avoid lambda usage, and would have to write these as:
> >
> > Why avoid "lambda" usage ? You find them too difficult to read (I mean in
> > general) ?
>
> Yup, basically a readability thing.  I also tend to find that if I
> actually declare the function, I can often find a way to refactor things
> to make that function useful in more than one place.
>
> Additionally, 'lambda' is on Guido's regrets list, so I'm avoiding it's
> use in case it gets yanked for Python 3.0.  I think most code can be
> written now without it, and in most cases code so written is clearer.
> Probably worth looking at is a thread I started that went through some
> stdlib uses of lambda and how they could be rewritten:
>
> http://mail.python.org/pipermail/python-list/2004-December/257990.html
>
> Many were rewritable with def statements, list comprehensions, the
> operator module functions, or unbound or bound methods.
>
> Steve

I see. I personnaly use them frequently to bind an argument of a function with 
some fixed value. Modifying one of the example in 
http://mail.python.org/pipermail/python-list/2004-December/257990.html
I frequently have something like :

SimpleXMLRPCServer.py:  server.register_1arg-place_function(lambda x: x+2, 
'add2')

If "Guido" don't like lambdas, he would have to give me some way to easily do 
this. Something like (or similar to fit Python syntax) :

SimpleXMLRPCServer.py:  server.register_1arg-place_function(\+2, 'add2')

This would be great.

Regards

Francis Girard



     server.register_function(operator.add, 'add')




From s_t_a_n_i at yahoo.com  Thu Feb 24 06:51:23 2005
From: s_t_a_n_i at yahoo.com (http://www.stani.be)
Date: 24 Feb 2005 03:51:23 -0800
Subject: ANN: SPE 0.7.2.C Python IDE with wxGlade, UML & Blender support
Message-ID: <1109245883.805769.104080@z14g2000cwz.googlegroups.com>

Spe is a python IDE with auto-indentation, auto completion, call tips,
syntax coloring, uml viewer, syntax highlighting, class explorer,
source index, auto todo list, sticky notes, integrated pycrust shell,
python file browser, recent file browser, drag&drop, context help, ...
Special is its blender support with a blender 3d object browser and its
ability to run interactively inside blender. Spe ships with wxGlade
(gui designer), PyChecker (source code doctor) and Kiki (regular
expression console). Spe is extensible with wxGlade.

If you like SPE, please contribute by coding, writing documentation or
donating. I would like to thank especially Mike of Partner2Partner, who

gave a nice donation to SPE.

Also I would like to thank Michael Foord, who made SPE part of a new
Python
distribution, called "movable python". It gives you the possibility to
carry your
favorite developping environment on a USB stick. So you can continue
your work on
any computer or test your modules for different python versions. This
distribution
opens a lot of new possibilities, check it out!! For more info, visit
http://www.voidspace.org.uk/python/programs.shtml#movpy

:Batteries included:
  - Kiki:
      Regular Expression (regex) console. For more info:
      http://project5.freezope.org/kiki/index.html
  - PyChecker:
      PyChecker is a tool for finding bugs in python source code. It
      finds problems that are typically caught by a compiler for
      less dynamic languages, like C and C++. It is similar to lint.
      For more info: http://pychecker.sourceforge.net
  - wxGlade:
      wxGlade is a GUI designer written in Python with the
      popular GUI toolkit wxPython, that helps you create
      wxWindows/wxPython user interfaces. As you can guess by the
      name, its model is Glade, the famous GTK+/GNOME GUI builder,
      with which wxGlade shares the philosophy and the look & feel
      (but not a line of code). For more info:
      http://wxglade.sourceforge.net

:Bug fixes:
    - right click menu

:Donations(50 euro):
    - Mike (Partner2partner)

:Contributors:
  - Thurston Stone

:Requirements:
  - full python 2.3+
  - wxpython 2.5.3.8+
  - optional blender 2.35+

:Links:
    - Homepage:     http://spe.pycs.net
    - Website:      http://projects.blender.org/projects/spe/
    - Screenshots:  http://spe.pycs.net/pictures/index.html
    - Forum:        http://projects.blender.org/forum/?group_id=30
    - RSS feed:     http://spe.pycs.net/weblog/rss.xml



From penglish1 at gmail.com  Fri Feb 11 20:31:29 2005
From: penglish1 at gmail.com (penglish1 at gmail.com)
Date: 11 Feb 2005 17:31:29 -0800
Subject: xmlrpc username/password failures
Message-ID: <1108171889.717864.232940@o13g2000cwo.googlegroups.com>

Hi,

 I'm trying to get xmlrpc working with usernames and passwords and
 having some issues. This is on Linux (WBEL3.0R1).

First of all with python 2.2.3 which comes with WBEL the following
simple code fails (passwords & server names altered to protect the
innocent):

#!/usr/bin/python

import xmlrpclib
from xmlrpclib import *

test =
Server('http://3tier:My&Passw6 at www.server.net/Forecast')

print test.ReturnSimpleInt()

Returns the following error:

Traceback (most recent call last):
  File "./testCondon.py", line 8, in ?
    print test.ReturnSimpleInt()
  File "/usr/lib/python2.2/xmlrpclib.py", line 821, in __call__
    return self.__send(self.__name, args)
  File "/usr/lib/python2.2/xmlrpclib.py", line 975, in __request
    verbose=self.__verbose
  File "/usr/lib/python2.2/xmlrpclib.py", line 833, in request
    h = self.make_connection(host)
  File "/usr/lib/python2.2/xmlrpclib.py", line 862, in make_connection
    return httplib.HTTP(host)
  File "/usr/lib/python2.2/httplib.py", line 969, in __init__
    self._setup(self._connection_class(host, port, strict))
  File "/usr/lib/python2.2/httplib.py", line 491, in __init__
    self._set_hostport(host, port)
  File "/usr/lib/python2.2/httplib.py", line 502, in _set_hostport
    raise InvalidURL("nonnumeric port: '%s'" % host[i+1:])
httplib.InvalidURL: nonnumeric port:
'My&Passw6 at sd-portal.prasentia.net'

Strangely enough, the URL is not considered invalid by Python 2.4
(compiled fresh on WBEL), but I get 401 Unauthorized even though I can
cut/paste the URL into my browser (firefox 1.0) and I'm given
access...so I *know* it is not a typo:

Traceback (most recent call last):
  File "./testCondon.py", line 8, in ?
    print test.ReturnSimpleInt()
  File "/usr/lib/python2.4/xmlrpclib.py", line 1096, in __call__
    return self.__send(self.__name, args)
  File "/usr/lib/python2.4/xmlrpclib.py", line 1383, in __request
    verbose=self.__verbose
  File "/usr/lib/python2.4/xmlrpclib.py", line 1137, in request
    headers
xmlrpclib.ProtocolError: <ProtocolError for
  3tier:My&Passw6 at www.server.net/Forecast: 401 Unauthorized>

The _only_ thing I was able to find in google about this is this one
bug:
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=944396&group_id=5470

which seems to indicate that username:password at hostname is not
*actually* an RFC valid syntax. However the xmlrpclib documenation
clearly indicates that that is *the* syntax to use:

http://docs.python.org/lib/module-xmlrpclib.html

What gives? What is the "right" way to do it?

Thanks,
Paul



From BOOGIEMANPN at YAHOO.COM  Tue Feb 22 16:37:28 2005
From: BOOGIEMANPN at YAHOO.COM (BOOGIEMAN)
Date: Tue, 22 Feb 2005 22:37:28 +0100
Subject: how to interrupt time.sleep ?
Message-ID: <19k4miq1ddzn9.11addj27xoc2w$.dlg@40tude.net>

I have line  "time.sleep(60)"  in my code

How do I cancel waiting 60 seconds if I want to continue with program 
imediately  ? Like "Press some button if you don't want to wait"

If it can't be canceled what's the other solution to 
"wait certain time/or press any button to continue" problem ?


From bhv1 at psu.edu  Tue Feb 22 11:59:40 2005
From: bhv1 at psu.edu (Brian Victor)
Date: Tue, 22 Feb 2005 10:59:40 -0600
Subject: Sizers VS window size
References: <e0f0f902.0502220837.16a22ead@posting.google.com>
Message-ID: <slrnd1mp6p.t0p.bhv1@pa-steclge-u3-c3b-133.stcgpa.adelphia.net>

Deltones wrote:
> However, if I add this part from the tutorial, I get a much smaller
> window. Why is there an interference with the result I want when
> adding the sizer code?
[snip]
> self.sizer.Fit(self)

As noted in the the docs for Fit(): "Tell the sizer to resize the window
to match the sizer's minimal size."  Take this call out and the size
should be as you expect.

-- 
Brian


From steve at myplace.com  Mon Feb 21 17:29:22 2005
From: steve at myplace.com (Steve M)
Date: Mon, 21 Feb 2005 16:29:22 -0600
Subject: Tuple index
References: <cvbcc6$b5f$1@news.netins.net>
	<1108951559.490554.305310@l41g2000cwc.googlegroups.com>
	<cvdian$ejs$1@news.netins.net> <zvOdneQkB6SyzoffRVn-jw@comcast.com>
	<cvdll3$f4u$1@news.netins.net>
	<1109023881.232830.183100@o13g2000cwo.googlegroups.com>
Message-ID: <cvdnn3$eao$1@news.netins.net>

John Machin wrote:

> 
> Steve M wrote:
>> I'm actually doing this as part of an exercise from a book. What the
> program
>> is supposed to do is be a word guessing game. The program automaticly
>> randomly selects a word from a tuple.
> 
> Care to tell us which book is using a tuple for this, but hasn't got to
> lists yet?
> 
> Cheers,
> John

Python Programming for the absoulte beginner by Michael Dawson

Steve


From mefjr75 at hotmail.com  Sun Feb 13 12:44:35 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 13 Feb 2005 09:44:35 -0800
Subject: Text files read multiple files into single file,
	and then recreate the multiple files
References: <1108250252.479092.298670@z14g2000cwz.googlegroups.com>
Message-ID: <1108316675.944338.102340@z14g2000cwz.googlegroups.com>

googlinggoogler at hotmail.com wrote:
> Hiya,
>
> The title says it all really, but im a newbie to python sort of. I
can
> read in files and write files no probs.
>
> But what I want to do is read in a couple of files and output them to
> one single file, but then be able to take this one single file and
> recreate the files I put into it.
>
> Im really at a loss as to how I go about recovering the files?
> obviously if i scan for a string that specifys the start and end of
> each file, theres the chance that the file might contain this term to
> which would split the files into unwanted chucks of file, which
wouldnt
> be wanted.
>
> Any ideas? code snippets?
>
> Im very grateful!
Ok, for the seperating of the records you could something like this.
This function returns a generator that can iterate thru your records.
Py> #Single file multi-record seperator
... def recordbreaker(record, seperator='#NextRecord#'):
...   seplen = len(seperator)
...   rec = open(record ,'rb')
...   a =[]
...   for line in rec:
...       sep = line.find(seperator)
...       if  sep != -1:
...           a.append(line[:sep])
...           out = ''.join(a)
...           a =[]
...           a.append(line[sep+seplen:].lstrip())
...           yield out
...       else:
...           a.append(line)
...   if a:
...       yield ''.join(a)
...   rec.close()
...
Py> # to use it directly
Py> records = recordbreaker('myrecords.txt')
Py> first_record = records.next()
Py> second_record = records.next()
Py> # or you can do this
Py> for record in records:
Py>     print record

Getting them in a single file is easy, and will be an excercise left to
the reader.
The fileinput module is your friend it is in the standard library.
Be sure to check it out if you haven't already.
hth,
M.E.Farmer



From danperl at rogers.com  Wed Feb  9 21:05:14 2005
From: danperl at rogers.com (Dan Perl)
Date: Wed, 9 Feb 2005 21:05:14 -0500
Subject: newbie question
References: <1107990182.516041.120410@o13g2000cwo.googlegroups.com>
Message-ID: <seudnRY79e_AXJffRVn-pg@rogers.com>


<doodle4 at gmail.com> wrote in message 
news:1107990182.516041.120410 at o13g2000cwo.googlegroups.com...
> Hello All,
> What is the python equivalent of the following statement?
>
> while (n--)

Like other posters said, you should give more details with your question. 
What do you mean by equivalent?  The following is *functionally* equivalent:
    for n in range(start, 0, -1):

Of course, there is always:
    while n:
        ...
        n -= 1

But unfortunately, no, I don't think there is an equivalent in python that 
has the conciseness of the C statement.  The pre- and post-increment 
and -decrement in C/C++/Java are very powerful and I miss them in python. 




From marian at mba-software.de  Sun Feb  6 23:52:08 2005
From: marian at mba-software.de (=?ISO-8859-1?Q?Marian_Aldenh=F6vel?=)
Date: Mon, 07 Feb 2005 05:52:08 +0100
Subject: pygame.mixer.music not playing
In-Reply-To: <mailman.2029.1107716891.22381.python-list@python.org>
References: <36mb0iF54udklU1@individual.net>	<1107700800.258876.298010@z14g2000cwz.googlegroups.com>	<36mvjkF54gvnrU1@individual.net>
	<mailman.2029.1107716891.22381.python-list@python.org>
Message-ID: <36oag0F54d5caU1@individual.net>

Hi,

> Perhaps Zinf?

I could not find anything about remote-controlling it. Did not install
it, however.

Ciao, MM
-- 
Marian Aldenh?vel, Rosenhain 23, 53123 Bonn. +49 228 624013.
http://www.marian-aldenhoevel.de
"Wir brauchen keine Opposition, wir sind bereits Demokraten."


From jordan2856977 at 163.com  Sat Feb  5 06:42:26 2005
From: jordan2856977 at 163.com (jordan2856977)
Date: 5 Feb 2005 03:42:26 -0800
Subject: sos!
Message-ID: <6d2e4eef.0502050342.d8744cb@posting.google.com>

hellow everybody! I'm from china. I'm a beginner of python. in china,
python is not a fashionable language, so it's difficult to find some
books about python. finally,I find a book named "python how to
program" wrote by H.M.Deitel . who can tell me where can I find some
interesting source code about python. otherwise, I will fell boring
about study!


From sjmachin at lexicon.net  Tue Feb  8 18:49:12 2005
From: sjmachin at lexicon.net (John Machin)
Date: 8 Feb 2005 15:49:12 -0800
Subject: Choosing the right parser for parsing C headers
References: <1107861023.254610.14310@g14g2000cwa.googlegroups.com>
Message-ID: <1107906552.023074.291470@o13g2000cwo.googlegroups.com>


Jean  de Largentaye wrote:
> Hi,
>
> I need to parse a subset of C (a header file), and generate some unit
> tests for the functions listed in it. I thus need to parse the code,
> then rewrite function calls with wrong parameters. What I call
"shaking
> the broken tree" :)

I was thinking "cdecl", and googling brought up this:

http://arrowtheory.com/software/python/

Another option, which I used recently when I had to parse a whole bunch
of Oracle 'create table' scripts [with semi-structured comments which
had to be mined for additional info]: write a recursive descent parser
-- but maybe the grammar of C function declarations is too complicated
for this.

HTH,
John



From mwm at mired.org  Mon Feb 21 01:19:27 2005
From: mwm at mired.org (Mike Meyer)
Date: Mon, 21 Feb 2005 00:19:27 -0600
Subject: Article on Hi-Fi Myths
References: <111hvnra44hgr03@corp.supernews.com>
Message-ID: <867jl2h1u8.fsf@guru.mired.org>

Al Christians <achrist at easystreet.com> writes:

> I learned Friday night that the hi-fi talk is our most popular tape.
> This page:
>
> http://www.belt.demon.co.uk/product/Cable_Controversy/Cable_Controversy.htm
>
> Gives a somewhat different take on the controversy, almost certainly
> bizarre.  It's a long page and the interesting part is near the end.
> The conclusion is:
>
> 	"you just need to know what techniques to use to create a
> 	'friendly', 'relaxing', energy pattern."


I find that playing back Python code over multi-stranded copper
produces the best results.

         <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From mefjr75 at hotmail.com  Tue Feb  1 22:47:17 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 1 Feb 2005 19:47:17 -0800
Subject: web camera or else ? 15-30 fps processing of camera videos.
In-Reply-To: <1107303983.662065.93580@c13g2000cwb.googlegroups.com>
References: <1107295229.657375.318750@o13g2000cwo.googlegroups.com>
	<420006a5$0$714$c3e8da3@news.astraweb.com>
	<1107303983.662065.93580@c13g2000cwb.googlegroups.com>
Message-ID: <1107316037.959415.101810@g14g2000cwa.googlegroups.com>

JGCASEY wrote:
> The Artist Formerly Known as Kap'n Salty wrote:
> > Newbie wrote:
> > > I am doing some robotics projects but my main area of interest is
> > > trying out several algorithms for the processing of the stream of
> data
> > > coming from the video.
> > >
> > > I am wondering what type of camera I should invest in. Either I
> could
> > > buy a web cam and hope I can find a driver I could either modify
or
> > > use. i.e. every frame is somehow stored on the computer
> automagically
> > > or I could buy a camera not unlike the AVRcam
> > > (http://www.jrobot.net/Projects/AVRcam.html) or the CMUcam and
try
> to
> > > do the processing once the data has been streamed to the nearest
> > > computer ? or should I use an expensive video card, some CCTV
> camera
> > > and a frame grabber to digitize photos so they can be processed
> > > afterwards. I expect my processing algorithms to handle at least
15
> > > frames per second framerate once they are working ont the final
> set-up.
> > >
> > > My constraints are that I would like to avoid as much as possible
> > > complex set-ups even if that means buying a more expensive camera
> > > set-up. For the prototyping, I would like to try my algorithms
out
> > > using a combination of python and matlab (all very slow) and then
> > > expect the same architecture (image files location and flow) with
> > > speedier set-up like python+psyco or C. All the processing would
be
> > > done on a computer dedicated for that. Windows or Linux are
> possible.
> > >
> >
> > An easy approach to this is to use a wireless camera on your robot,
> with
> > the receiver attached to a frame grabber on a remote host. This
> allows
> > you your choice of camera (stand alone video transmitters are
widely
> > available), and you are not limited to only processing hardware you
> can
> > carry on board your robot. You also get full FPS. Frame-grabber
cards
>
> > are inexpensive and widely available for both Windows and Linux.
>
> I wanted to go down that path but cannot get
> information on how to access the images from
> the tv receiver card in real time using my
> own software.
>
> Do you use Java?
>
> John Casey
Ever do search on Google?
This was number 1 and 2 ;). I searched for "python video capture".
I have used this module and it works well, it also has a really nifty
ftp uploader demo script.
http://videocapture.sourceforge.net/

hth,
M.E.Farmer



From evenprimes at gmail.com  Thu Feb  3 15:24:59 2005
From: evenprimes at gmail.com (Chris Cioffi)
Date: Thu, 3 Feb 2005 15:24:59 -0500
Subject: Why does super() require the class as the first argument?
In-Reply-To: <20050203140230680-0500@braeburn.themorgue.org>
References: <20050203140230680-0500@braeburn.themorgue.org>
Message-ID: <f03f4fdf050203122428297400@mail.gmail.com>

At runtime there is nothing to say that the class hasn't been
subclassed again.

example:

class A(someclass):
    def __init__(self):
        super(self).__init__()
        do_something()

class B(A):
    """No __init__"""
    def blah(self):
        pass

When you use class B, how does the super we inheirited from A know
where to call?  Without the class name in super you end up with
infinite recursion.  (Which can be kinda fun to watch as it
crashes...)

Chris

On Thu, 03 Feb 2005 12:05:27 -0800 (PST), Kevin Smith
<Kevin.Smith at sas.com> wrote:
> I like the idea of the super() function, but it doesn't seem to solve
> the problem that I'm trying to fix.  I don't like hard-coding in calls
> to super classes using their names:
> 
> class A(object):
>    def go(self):
>        ...
> 
> class B(A):
>    def go(self):
>        ...
>        A.go(self)
> 
> I don't like this because if I ever change the name of 'A', I have to go
> through all of the methods and change the names there too.  super() has
> the same problem, but I'm not sure why.  It seems like I should be able
> to do:
> 
> class B(A):
>    def go(self):
>        ...
>        super(self).go()
> 
> I can create a super() that does this as follows:
> 
> _super = super
> def super(obj, cls=None):
>    if cls is None:
>        return _super(type(obj), obj)
>    return super(cls, obj)
> 
> I guess I'm just not sure why it wasn't done that way in the first place.
> 
> --
> Kevin Smith
> Kevin.Smith at sas.com
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
"It is our responsibilities, not ourselves, that we should take
seriously." -- Peter Ustinov


From albaalu at gmail.com  Mon Feb 14 19:48:21 2005
From: albaalu at gmail.com (PD)
Date: 14 Feb 2005 16:48:21 -0800
Subject: wxPython OGL future
Message-ID: <1108428501.441786.154130@g14g2000cwa.googlegroups.com>

Hi Everyone,

I am sort of a new developer to python and working in an academic
environment. I climbed the learning curve on wxPython far enough to get
the functionality I want out of it so far... Now Im in need of a
diagramming library (something visio-like) to use for my software and
the only option I have seen is OGL. Yet I read that OGL is dead, no
longer maintained, obsucure and lacking documentation. Instead of
taking a leap of faith and walking off a cliff, Ide appreciate if some
people out there who have come across a similar problem have any
solutions or suggestions for me...

I am so disappointed at the moment I think Im about ready to throw in
the towel and crawl back to java. I love python, but it has some real
difficulties when it comes to making library choices on what _to_ and
_not to_ get yourself into.

I appreciate your guidance,
Pouya



From pierre.imbaud at wanadoo.fr  Mon Feb  7 19:11:27 2005
From: pierre.imbaud at wanadoo.fr (Imbaud Pierre)
Date: Tue, 08 Feb 2005 01:11:27 +0100
Subject: negative integer division
Message-ID: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>

integer division and modulo gives different results in c and python, 
when negative numbers
are involved. take gdb as a widely available c interpreter
  print -2 /3
0 for c, -1 for python.
more amazing, modulos of negative number give negative values! (in c).
from an algebraic point of view, python seems right, but I thought 
python conformity to the underlying c compiler was a strong commitment, 
obviously not here, and I found no explanation whatsoever in python doc.
no actual programming challenge for me here, I just had this bug, after 
confidently translating from python to c.



From dbickett at gmail.com  Wed Feb  2 21:13:48 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Wed, 2 Feb 2005 21:13:48 -0500
Subject: streaming a file object through re.finditer
In-Reply-To: <1107396145.400036.271010@g14g2000cwa.googlegroups.com>
References: <1107396145.400036.271010@g14g2000cwa.googlegroups.com>
Message-ID: <1d6cdae3050202181374887bce@mail.gmail.com>

The following example loads the file into memory only one line at a
time, so it should suit your purposes:

>>> data = file( "important.dat" , "w" )
>>> data.write("this\nis\nimportant\ndata")
>>> data.close()

now read it....

>>> import re
>>> data = file( "important.dat" , "r" )
>>> line = data.readline()
>>> while line:
	for x in re.finditer( "\w+" , line):
		print x.group()
	line = data.readline()

	
this
is
important
data
>>> 


-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From steven.bethard at gmail.com  Fri Feb  4 14:47:41 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 04 Feb 2005 12:47:41 -0700
Subject: string issue
In-Reply-To: <36QMd.103084$Jk5.36127@lakeread01>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
	<36QMd.103084$Jk5.36127@lakeread01>
Message-ID: <ZvydndGa1PDHTJ7fRVn-ow@comcast.com>

Steve Holden wrote:
> You are modifying the list as you iterate over it. Instead, iterate over 
> a copy by using:
> 
> for ip in ips[:]:
>   ...

Also worth noting, you can write this like:

     for ip in list(ips):
         ...

if you're afraid of smiley-faces [:] in your code. ;)

Steve


From michele.simionato at gmail.com  Tue Feb 22 07:57:20 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 22 Feb 2005 04:57:20 -0800
Subject: pydoc documentation- referred to Michele answer
In-Reply-To: <mailman.2931.1109072702.22381.python-list@python.org>
References: <mailman.2931.1109072702.22381.python-list@python.org>
Message-ID: <1109077040.118735.270380@l41g2000cwc.googlegroups.com>

It works for any module in your path, including your
current directory. Supposer you have

/home/myname/mymodule.py

do the following:

$ cd /home/myname
$ pydoc -g

open the browser and you will see the documentation
for mymodule.py just below the documentation for
the builtin modules.

           Michele Simionato



From fredrik at pythonware.com  Sat Feb 19 11:55:10 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 19 Feb 2005 17:55:10 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr><42172136$0$27576$9b622d9e@news.freenet.de><cv7i57$d0v$1@usenet.otenet.gr>
	<cv7k8e$4pa$03$1@news.t-online.com> <cv7m2m$gp$1@usenet.otenet.gr>
Message-ID: <cv7qqt$uaf$1@sea.gmane.org>

Ilias Lazaridis wrote:

> Should a professional developer take python serious?

yes.

</F> 





From davidf at sjsoft.com  Tue Feb 15 04:23:39 2005
From: davidf at sjsoft.com (David Fraser)
Date: Tue, 15 Feb 2005 11:23:39 +0200
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <1108407625.250592.104280@c13g2000cwb.googlegroups.com>
References: <cuo71l$gig$1@usenet.otenet.gr><cupupa$kfs$2@usenet.otenet.gr>
	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>
	<cuqqqi$ep1$1@ctb-nnrp2.saix.net>
	<1108407625.250592.104280@c13g2000cwb.googlegroups.com>
Message-ID: <cusegg$nbb$2@ctb-nnrp2.saix.net>

Pat wrote:
> Actually, no.  We ran into some issues with Python 2.4 that caused us
> to return to Python 2.3.5.  But I would really like to upgrade to
> Python 2.4.  So I started researching the subject before I did
> anything.
> 
> If you are telling me that minGW can compile extensions that are
> compatible with the Python 2.4 that uses msvcr71.dll, then that is good
> news indeed.  Is there anything that needs to be configured or patched
> to make this happen?  And how does minGW know which dll to link?  What
> if I have both versions of Python installed - 2.3.5 and 2.4?  Is there
> an easy way to detect this and switch between the two dlls?
> 
> If I'm asking questions already answered elsewhere, I'd love a link to
> that resource, if you have it.

I use MinGW myself to compile extensions for Python 2.3.x so you should 
have no problems there. And it seems like from the rest of the thread 
that it works for Python 2.4 as well.
But please just download it, try it out, and report any problems in a 
separate thread here - I'm sure you'll find people more than willing to 
help. The actual error messages etc will yield more valuable discussion 
than any speculation now - or you might find it just working

David


From bradd+news at szonye.com  Wed Feb  2 12:21:38 2005
From: bradd+news at szonye.com (Bradd W. Szonye)
Date: Wed, 02 Feb 2005 17:21:38 GMT
Subject: what's OOP's jargons and complexities?
References: <1106953849.915440.134710@f14g2000cwb.googlegroups.com>
	<1107060381.623163.19850@z14g2000cwz.googlegroups.com>
	<873bwjj8fe.fsf@thalassa.informatimago.com>
	<ctnckn$462$1@news-rocq.inria.fr>
Message-ID: <slrnd02312.nk0.bradd+news@szonye.com>

Grumble <devnull at kma.eu.org> wrote:
> Pascal Bourguignon wrote:
> 
>> You forgot to mention the coordinates of your secret mountain compound:
>> 
>>                    28 deg 5 min N, 86 deg 58 min E
> 
> Mount Everest?

Shhh!
-- 
Bradd W. Szonye
http://www.szonye.com/bradd


From steve at holdenweb.com  Sat Feb  5 08:05:20 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 05 Feb 2005 08:05:20 -0500
Subject: Error!
In-Reply-To: <614c778e.0502050402.4c6f46eb@posting.google.com>
References: <614c778e.0502041459.39da55c1@posting.google.com>
	<1107563070.861085.180680@g14g2000cwa.googlegroups.com>
	<614c778e.0502050402.4c6f46eb@posting.google.com>
Message-ID: <BB3Nd.103625$Jk5.20748@lakeread01>

administrata wrote:

> "John Machin" <sjmachin at lexicon.net> wrote in message news:<1107563070.861085.180680 at g14g2000cwa.googlegroups.com>...
> 
>>administrata wrote:
>>
>>>I'm programming Car Salesman Program.
>>>It's been "3 days" learning python...
>>
>>>From whom or what book or what tutorial?
>>
>>
>>>But, i got problem
>>
>>You got problemS. What Jeff & Brian wrote, plus:
>>
>>You have "change" instead of "charge".
>>
>>You forgot to add in the base price -- "actual price" according to you
>>comprises only the taxes and fees. Where is your car yard? We'd each
>>like to order a nice shiny red Ferrari :-)
>>
>>Cheers,
>>John
> 
> 
> erm... sry i don't get it :\
> 
He's referring to the fact that your calculations, probably through 
inexperience with programming, don't appear to add tax to the base price 
but rather simply compute tax from it.

Don't worry, it wasn't *that* funny :-)

> can you modify actual_price?
> 
> actual_price = (((base_price * tax / 100) + license1 / 100) + dealer +
> charge

It would be much simpler if, having read the base price and the license 
(which I presume you are expecting to be percentages) you then 
separately computed the tax *amount* and the license *amount*, then just 
added everything together.

So, for example, your program might look like this:

base_price = int(raw_input(...))
tax_rate = int(raw_input(...)
tax_amount = base_price * ((100+tax_amount)/...)
  ...
actual_price = (base_price +
                 tax_amount +
                 license_amount +
                 dealer +
                 charge)
print "Please hand over", actual_price

Obviously the "..." are the bits you fill in to complete the program. 
Good luck!

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From raghulj at gmail.com  Mon Feb 21 23:58:29 2005
From: raghulj at gmail.com (Raghul)
Date: 21 Feb 2005 20:58:29 -0800
Subject: copying or moving the mail message using imaplib
In-Reply-To: <421ab853$0$44647$a1866201@visi.com>
References: <1109044151.869953.187270@c13g2000cwb.googlegroups.com>
	<mailman.2918.1109045457.22381.python-list@python.org>
	<1109046578.692118.24350@l41g2000cwc.googlegroups.com>
	<421ab853$0$44647$a1866201@visi.com>
Message-ID: <1109048308.986644.27870@c13g2000cwb.googlegroups.com>

Thanx I got some clear view about this. In the above program I used uid
method to copy thje mail to "Inbox".This shows the out put of my mail
messages and In the copy of messages I got the output
when printing the "dat"

('OK', [None])
('OK', ['2 (UID 16 FLAGS (\\Seen))'])
2

I cannot see the message in the INBOX. Can anyone give me a solution.



From josh at yucs.org  Mon Feb  7 11:34:26 2005
From: josh at yucs.org (josh at yucs.org)
Date: Mon, 7 Feb 2005 11:34:26 -0500
Subject: time + timedelta
In-Reply-To: <20050207162420.GA19677@yucs.org>
References: <20050207162420.GA19677@yucs.org>
Message-ID: <20050207163425.GA21261@yucs.org>

sorry, patch really attached to this message.

On Mon, Feb 07, 2005 at 11:24:20AM -0500, josh wrote:
> datetime.time should support timedelta arithmetic, patch attached.
> 
> Times greater than 24 hours should not raise an exception, but always
> wrap around. Any other behavior is too surprising. (People expect to be
> able to call you up at 11pm, and say "meet me in two hours" (if you're a
> night person)).
> 
> Clock time is cyclical. Though it's convenient to assign hours numbers,
> an unqualified hour 23.5 is not naturally "greater than" hour 0.5.
> (Though I'm not suggesting that we break this.)
> 
> The special meaning for hour 0 is only relevant for datetimes. When
> dates are not involved, it shouldn't get any special treatment.
> When dates are involved, it's easy to "assert datetime1.date() ==
> datetime2.date()"
> 
> If this change is made however, maybe datetime.timedelta(hours=-1)
> should no longer normalize to datetime.timedelta(-1, 82800)
> 
-------------- next part --------------
*** Doc/lib/libdatetime.tex1	2005-02-03 21:53:06.000000000 -0500
--- Doc/lib/libdatetime.tex	2005-02-03 22:11:52.000000000 -0500
***************
*** 1059,1069 ****
  
  Supported operations:
  
! \begin{itemize}
!   \item
!     comparison of \class{time} to \class{time},
!     where \var{a} is considered less than \var{b} when \var{a} precedes
!     \var{b} in time.  If one comparand is naive and the other is aware,
      \exception{TypeError} is raised.  If both comparands are aware, and
      have the same \member{tzinfo} member, the common \member{tzinfo}
      member is ignored and the base times are compared.  If both
--- 1059,1122 ----
  
  Supported operations:
  
! \begin{tableii}{c|l}{code}{Operation}{Result}
!   \lineii{\var{time2} = \var{time1} + \var{timedelta}}{(1)}
! 
!   \lineii{\var{time2} = \var{time1} - \var{timedelta}}{(2)}
! 
!   \lineii{\var{timedelta} = \var{time1} - \var{time2}}{(3)}
! 
!   \lineii{\var{time1} < \var{time2}}
!    {Compares \class{time} to \class{time}.
!     (4)}
! 
! \end{tableii}
! 
! \begin{description}
! 
! \item[(1)]
! 
!     time2 is a duration of timedelta removed from time1, moving
!     forward in time if \code{\var{timedelta}.seconds} > 0, or backward if
!     \code{\var{timedelta}.seconds} < 0.  The result has the same \member{tzinfo} member
!     as the input time, and time2 - time1 == timedelta after.
!     Note that no time zone adjustments are done even if the input is an
!     aware object.
! 
! \item[(2)]
!     Computes the time2 such that time2 + timedelta == time1.
!     As for addition, the result has the same \member{tzinfo} member
!     as the input time, and no time zone adjustments are done even
!     if the input is aware.
!     This isn't quite equivalent to time1 + (-timedelta), because
!     -timedelta in isolation can overflow in cases where
!     time1 - timedelta does not.
! 
! \item[(3)]
!     Subtraction of a \class{time} from a
!     \class{time} is defined only if both
!     operands are naive, or if both are aware.  If one is aware and the
!     other is naive, \exception{TypeError} is raised.
! 
!     If both are naive, or both are aware and have the same \member{tzinfo}
!     member, the \member{tzinfo} members are ignored, and the result is
!     a \class{timedelta} object \var{t} such that
!     \code{\var{time2} + \var{t} == \var{time1}}.  No time zone
!     adjustments are done in this case.
! 
!     If both are aware and have different \member{tzinfo} members,
!     \code{a-b} acts as if \var{a} and \var{b} were first converted to
!     naive UTC times first.  The result is
!     \code{(\var{a}.replace(tzinfo=None) - \var{a}.utcoffset()) -
!           (\var{b}.replace(tzinfo=None) - \var{b}.utcoffset())}
!     except that the implementation never overflows.
! 
! \item[(4)]
! 
! \var{time1} is considered less than \var{time2}
! when \var{time1} precedes \var{time2} in time.
! 
!     If one comparand is naive and the other is aware,
      \exception{TypeError} is raised.  If both comparands are aware, and
      have the same \member{tzinfo} member, the common \member{tzinfo}
      member is ignored and the base times are compared.  If both
***************
*** 1076,1093 ****
      raised unless the comparison is \code{==} or \code{!=}.  The latter
      cases return \constant{False} or \constant{True}, respectively.
  
!   \item
!     hash, use as dict key
  
!   \item
!     efficient pickling
! 
!   \item
!     in Boolean contexts, a \class{time} object is considered to be
!     true if and only if, after converting it to minutes and
!     subtracting \method{utcoffset()} (or \code{0} if that's
!     \code{None}), the result is non-zero.
! \end{itemize}
  
  Instance methods:
  
--- 1129,1141 ----
      raised unless the comparison is \code{==} or \code{!=}.  The latter
      cases return \constant{False} or \constant{True}, respectively.
  
! \end{description}
  
! \class{time} objects are hashable (usable as dictionary keys),
! support efficient pickling, and in Boolean contexts, a \class{time}
! object is considered to be true if and only if, after converting it to
! minutes and subtracting \method{utcoffset()} (or \code{0} if that's
! \code{None}), the result is non-zero.
  
  Instance methods:
  
*** Modules/datetimemodule.c1	2005-02-03 21:50:40.000000000 -0500
--- Modules/datetimemodule.c	2005-02-03 21:51:07.000000000 -0500
***************
*** 559,564 ****
--- 559,577 ----
  	return result;
  }
  
+ /* Force all the time fields into range.  The parameters are both
+  * inputs and outputs.  Cannot fail.
+  */
+ static void
+ normalize_time(int *day, int *hour, int *minute, int *second,
+                    int *microsecond)
+ {
+ 	normalize_pair(second, microsecond, 1000000);
+ 	normalize_pair(minute, second, 60);
+ 	normalize_pair(hour, minute, 60);
+ 	normalize_pair(day, hour, 24);
+ }
+ 
  /* Force all the datetime fields into range.  The parameters are both
   * inputs and outputs.  Returns < 0 on error.
   */
***************
*** 567,576 ****
                     int *hour, int *minute, int *second,
                     int *microsecond)
  {
! 	normalize_pair(second, microsecond, 1000000);
! 	normalize_pair(minute, second, 60);
! 	normalize_pair(hour, minute, 60);
! 	normalize_pair(day, hour, 24);
  	return normalize_date(year, month, day);
  }
  
--- 580,586 ----
                     int *hour, int *minute, int *second,
                     int *microsecond)
  {
! 	normalize_time(day, hour, minute, second, microsecond);
  	return normalize_date(year, month, day);
  }
  
***************
*** 3276,3281 ****
--- 3286,3398 ----
  }
  
  /*
+  * Time arithmetic.
+  */
+ 
+ /* time + timedelta -> time.  If arg negate is true, subtract the timedelta
+  * instead.
+  */
+ static PyObject *
+ add_time_timedelta(PyDateTime_Time *time, PyDateTime_Delta *delta, int negate)
+ {
+ 	int delta_s = GET_TD_SECONDS(delta);
+ 	int delta_us = GET_TD_MICROSECONDS(delta);
+ 	int day; /* ignored */
+ 	int hour = TIME_GET_HOUR(time);
+ 	int minute = TIME_GET_MINUTE(time);
+ 	int second = TIME_GET_SECOND(time) + (negate ? -delta_s : delta_s);
+ 	int microsecond = TIME_GET_MICROSECOND(time) + (negate ? -delta_us : delta_us);
+ 	
+ 	normalize_time(&day, &hour, &minute, &second, &microsecond);
+ 	return new_time(hour, minute, second, microsecond,
+ 			    HASTZINFO(time) ? time->tzinfo : Py_None);
+ }
+ 
+ static PyObject *
+ time_add(PyObject *left, PyObject *right)
+ {
+ 	if (PyDateTime_Check(left) || PyDateTime_Check(right)) {
+ 		Py_INCREF(Py_NotImplemented);
+ 		return Py_NotImplemented;
+ 	}
+ 	if (PyTime_Check(left)) {
+ 		/* time + ??? */
+ 		if (PyDelta_Check(right))
+ 			/* time + delta */
+ 			return add_time_timedelta((PyDateTime_Time *) left,
+ 						  (PyDateTime_Delta *) right,
+ 						  0);
+ 	}
+ 	else {
+ 		/* ??? + time
+ 		 * 'right' must be one of us, or we wouldn't have been called
+ 		 */
+ 		if (PyDelta_Check(left))
+ 			/* delta + time */
+ 			return add_time_timedelta((PyDateTime_Time *) right,
+ 						  (PyDateTime_Delta *) left,
+ 						  0);
+ 	}
+ 	Py_INCREF(Py_NotImplemented);
+ 	return Py_NotImplemented;
+ }
+ 
+ static PyObject *
+ time_subtract(PyObject *left, PyObject *right)
+ {
+ 	if (PyDateTime_Check(left) || PyDateTime_Check(right)) {
+ 		Py_INCREF(Py_NotImplemented);
+ 		return Py_NotImplemented;
+ 	}
+ 	if (PyTime_Check(left)) {
+ 		if (PyTime_Check(right)) {
+ 			/* time - time */
+ 			naivety n1, n2;
+ 			int offset1, offset2;
+ 			int delta_s, delta_us;
+ 			if (classify_two_utcoffsets(left, &offset1, &n1, left,
+ 						    right, &offset2, &n2,
+ 						    right) < 0)
+ 				return NULL;
+ 			assert(n1 != OFFSET_UNKNOWN && n2 != OFFSET_UNKNOWN);
+ 			if (n1 != n2) {
+ 				PyErr_SetString(PyExc_TypeError,
+ 					"can't subtract offset-naive and "
+ 					"offset-aware times");
+ 				return NULL;
+ 			}
+ 
+ 			/* These can't overflow, since the values are
+ 			 * normalized.  At most this gives the number of
+ 			 * seconds in one day.
+ 			 */
+ 			delta_s = (TIME_GET_HOUR(left) -
+ 				   TIME_GET_HOUR(right)) * 3600 +
+ 			          (TIME_GET_MINUTE(left) -
+ 			           TIME_GET_MINUTE(right)) * 60 +
+ 				  (TIME_GET_SECOND(left) -
+ 				   TIME_GET_SECOND(right));
+ 			delta_us = TIME_GET_MICROSECOND(left) -
+ 				   TIME_GET_MICROSECOND(right);
+ 			/* (left - offset1) - (right - offset2) =
+ 			 * (left - right) + (offset2 - offset1)
+ 			 */
+ 			delta_s += (offset2 - offset1) * 60;
+ 
+ 			return new_delta(0, delta_s, delta_us, 1);
+ 		}
+ 		if (PyDelta_Check(right)) {
+ 			/* time - delta */
+ 			return add_time_timedelta((PyDateTime_Date *) left,
+ 						  (PyDateTime_Delta *) right,
+ 						  1);
+ 		}
+ 	}
+ 	Py_INCREF(Py_NotImplemented);
+ 	return Py_NotImplemented;
+ }
+ 
+ /*
   * Miscellaneous methods.
   */
  
***************
*** 3502,3509 ****
  a tzinfo subclass. The remaining arguments may be ints or longs.\n");
  
  static PyNumberMethods time_as_number = {
! 	0,					/* nb_add */
! 	0,					/* nb_subtract */
  	0,					/* nb_multiply */
  	0,					/* nb_divide */
  	0,					/* nb_remainder */
--- 3619,3626 ----
  a tzinfo subclass. The remaining arguments may be ints or longs.\n");
  
  static PyNumberMethods time_as_number = {
! 	time_add,				/* nb_add */
! 	time_subtract,				/* nb_subtract */
  	0,					/* nb_multiply */
  	0,					/* nb_divide */
  	0,					/* nb_remainder */

From tim.peters at gmail.com  Sun Feb  6 16:53:17 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Sun, 6 Feb 2005 16:53:17 -0500
Subject: Insane import behaviour and regrtest.py: heeelp
In-Reply-To: <87wttlh2jx.fsf@pobox.com>
References: <87sm4aws3v.fsf@pobox.com>
	<mailman.2007.1107659039.22381.python-list@python.org>
	<876515ixj0.fsf@pobox.com>
	<mailman.2026.1107710574.22381.python-list@python.org>
	<87wttlh2jx.fsf@pobox.com>
Message-ID: <1f7befae050206135347f649d9@mail.gmail.com>

[John J. Lee]
> I'm still puzzled, though.  Reading the -vv output, I see that when
> importing test_cookielib (which is currently the only line in my
> regrtest.py -f file), Python doesn't appear to look in Lib/test to
> find module "test.test_cookielib" (the actual string passed by
> regrtest.py to __import__): see the output below.
>
> Why does Python not look in
>
> /usr/local/src/python/python/dist/src/Lib/test
>
> for test_cookielib.py{,c,o}??

Can't guess from here, from what you've shown.  Obvious possibilities:

1. /usr/local/src/python/python/dist/src/Lib
    isn't on sys.path

2. /usr/local/src/python/python/dist/src/Lib
   is on sys.path but directory
   /usr/local/src/python/python/dist/src/Lib/test
   doesn't exist

3. /usr/local/src/python/python/dist/src/Lib
   is on sys.path and directory
   /usr/local/src/python/python/dist/src/Lib/test
   exists but one of these files doesn't exist:
   a. /usr/local/src/python/python/dist/src/Lib/test/test_cookielib.py
   b. /usr/local/src/python/python/dist/src/Lib/test/__init__.py

> Snippet to show print statements I added to my regrtest.py :
>
> .     try:
> .         save_stdout = sys.stdout
> .         try:
> .             if cfp:
> .                 sys.stdout = cfp
> .                 print test              # Output file starts with test name
> .             if test.startswith('test.'):
> .                 abstest = test
> .             else:
> .                 # Always import it from the test package
> .                 abstest = 'test.' + test
> .+            print >> sys.stderr, ">>>>>>>sys.path", sys.path
> .             the_package = __import__(abstest, globals(), locals(), [])
> .+            print >> sys.stderr, ">>>>>>>the_package.__path__", the_package.__path__
> .             the_module = getattr(the_package, test)
> .             # Most tests run to completion simply as a side-effect of
> 
> Only other change to regrtest.py:
> 
> . if __name__ == '__main__':
> .     # Remove regrtest.py's own directory from the module search path.  This
> .     # prevents relative imports from working, and relative imports will screw
> .     # up the testing framework.  E.g. if both test.test_support and
> .     # test_support are imported, they will not contain the same globals, and
> .     # much of the testing framework relies on the globals in the
> .     # test.test_support module.
> .     mydir = os.path.abspath(os.path.normpath(os.path.dirname(sys.argv[0])))
> .     i = pathlen = len(sys.path)
> .     while i >= 0:
> .         i -= 1
> .         if os.path.abspath(os.path.normpath(sys.path[i])) == mydir:
> .             del sys.path[i]
> .     if len(sys.path) == pathlen:
> .         print 'Could not find %r in sys.path to remove it' % mydir
> .+    lib = "/usr/local/src/python/python/dist/src/Lib"
> .+    sys.path.insert(0, lib)
> .-    main()
> .+    main(testdir=lib)
> 
> Here's what I've got in my CVS checkout:
> 
> Lib[0]$ pwd
> /hda/usr/local/buf/python/python/dist/src/Lib

That doesn't look to be the same thing as the

    /usr/local/src/python/python/dist/src/Lib

you're asking about, right?

> Lib[0]$ ls test/test_cookielib* | grep -v 'patch\|latest\|~'
> test/test_cookielib.py
> test/test_cookielib.pyc

Since those files are apparenlty

    /hda/usr/local/buf/python/python/dist/src/Lib/test/test_cookielib.py
    /hda/usr/local/buf/python/python/dist/src/Lib/test/test_cookielib.pyc

and

    /hda/usr/local/buf/python/python/dist/src/Lib

isn't in your sys.path:

['/usr/local/src/python/python/dist/src/Lib',
  '/home/john/lib/python',
  '/usr/local/lib/python24.zip',
  '/usr/local/lib/python2.4',
  '/usr/local/lib/python2.4/plat-linux2',
  '/usr/local/lib/python2.4/lib-tk',
  '/usr/local/lib/python2.4/lib-dynload',
 '/usr/local/lib/python2.4/site-packages'
]

I don't understand why you think that "ls" output is (or should be) relevant.

> And the output:
> 
> Lib[0]$ python2.4 -u -vv test/regrtest.py -f test/torun -v 2>&1 | less
> [...long snip...]
> test_cookielib
> >>>>>>>sys.path ['/usr/local/src/python/python/dist/src/Lib', '/home/john/lib/python', '/usr/local/lib/python24.zip', '/usr/local/lib/python2.4', '/usr/local/lib/python2.4/plat-linux2', '/usr/local/lib/python2.4/lib-tk', '/usr/local/lib/python2.4/lib-dynload', '/usr/local/lib/python2.4/site-packages']
> # trying /usr/local/lib/python2.4/test/test_cookielib.so
> # trying /usr/local/lib/python2.4/test/test_cookielibmodule.so
> # trying /usr/local/lib/python2.4/test/test_cookielib.py
> import test.test_cookielib # from /usr/local/lib/python2.4/test/test_cookielib.py
> # can't create /usr/local/lib/python2.4/test/test_cookielib.pyc
...

See #2 and #3 above for some obvious possiblities not ruled out by
anything shown here.  I just don't see any mystery here, but might if
both of these displayed something interesting:

$ ls -l /usr/local/src/python/python/dist/src/Lib/test/test_cookielib.py
$ ls -l /usr/local/src/python/python/dist/src/Lib/test/__init__.py


From roy at panix.com  Fri Feb 25 11:06:11 2005
From: roy at panix.com (Roy Smith)
Date: 25 Feb 2005 11:06:11 -0500
Subject: Is there way to determine which class a method is bound to?
References: <mailman.3053.1109342775.22381.python-list@python.org>
Message-ID: <cvnidj$4si$1@panix2.panix.com>

In article <mailman.3053.1109342775.22381.python-list at python.org>,
Victor Ng  <crankycoder at gmail.com> wrote:
>I'm doing some evil things in Python and I would find it useful to
>determine which class a method is bound to when I'm given a method
>pointer.

I don't know where (or if) it's documented, but im_class seems to give
you what you want.

------
class Foo(object):
    def x(self):
        return 42

f = Foo()
print f.x.im_class
------

king:play$ ./x.py
<class '__main__.Foo'>

I have no idea why it's not __imclass__ or some such, but poking
around with dir() is a great way to explore little nooks and crannies
like this.  I just printed dir(Foo().x) and tried stuff that looked
interesting until I found what I (you) wanted.



From ggg at zzz.it  Thu Feb 24 11:45:58 2005
From: ggg at zzz.it (deelan)
Date: Thu, 24 Feb 2005 17:45:58 +0100
Subject: what is wrong?
In-Reply-To: <1109262977.742242.179610@l41g2000cwc.googlegroups.com>
References: <1109262977.742242.179610@l41g2000cwc.googlegroups.com>
Message-ID: <uh4lvc.iuj.ln@news1.interplanet.it>

neutrinman at myrealbox.com wrote:
(...)
>     self.feed = feed            # I wrote this
> AttributeError: can't set attribute
> 
> I add some codes to a program on a book. The lines that have "I wrote
> this" comment is the added codes. Could anyone tell me what is worng
> here?

the line:

feed = property(__get_feed)     # I wrote this

makes "feed" a *readonly* attribute.

cheers,
deelan.

-- 
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
<#me> a foaf:Person ; foaf:nick "deelan" ;
foaf:weblog <http://blog.deelan.com/> .


From kartic.krishnamurthy at gmail.com  Fri Feb  4 13:32:03 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 4 Feb 2005 10:32:03 -0800
Subject: Converting strings to dates
In-Reply-To: <mailman.1902.1107541483.22381.python-list@python.org>
References: <mailman.1902.1107541483.22381.python-list@python.org>
Message-ID: <1107541923.354901.45570@f14g2000cwb.googlegroups.com>

py>  import time
py> date_str = time.strftime('%Y-%m-%d', time.localtime())
py> date_str
'2005-02-04'
py> time.strptime(date_str, '%Y-%m-%d')
(2005, 2, 4, 0, 0, 0, 4, 35, -1)

That work?



From pipedreamergrey at gmail.com  Fri Feb 18 04:26:52 2005
From: pipedreamergrey at gmail.com (PipedreamerGrey)
Date: 18 Feb 2005 01:26:52 -0800
Subject: PythonCard and Py2Exe
In-Reply-To: <As6dnbvPDqwbEonfRVn-og@powergate.ca>
References: <1108476282.790371.155670@l41g2000cwc.googlegroups.com>
	<mailman.2620.1108476543.22381.python-list@python.org>
	<1108484617.908022.280320@l41g2000cwc.googlegroups.com>
	<acq57pnf.fsf@python.net>
	<1108604319.052270.170430@l41g2000cwc.googlegroups.com>
	<jOCdnY_u55-Ta47fRVn-3w@powergate.ca>
	<1108621701.919626.136070@o13g2000cwo.googlegroups.com>
	<As6dnbvPDqwbEonfRVn-og@powergate.ca>
Message-ID: <1108718812.161718.298260@o13g2000cwo.googlegroups.com>

I am using the command prompt.  What I realized after reading your
entry, Peter, is that if I use "setup.py py2exe" instead of "start
setup.py py2exe"  I can see the error in the same window without it
closing.

I went into the script and double spaced everything in case Notebook
smashed the lines together while I was tweaking the code.  After that,
the code resumed packing.  Now, however, it seems I'm back where I
started.  Running the .Exe returned this error:


Traceback (most recent call last):
  File "custdb.py", line 202, in ?
    app = model.Application(CustDbStack)
  File "PythonCard\model.pyc", line 337, in __init__
  File "PythonCard\resource.pyc", line 48, in getResource
  File "PythonCard\resource.pyc", line 86, in __init__
  File "PythonCard\resource.pyc", line 91, in __init__
  File "PythonCard\resource.pyc", line 91, in __init__
  File "PythonCard\resource.pyc", line 96, in __init__
  File "PythonCard\resource.pyc", line 139, in enforceSpec
  File "PythonCard\resource.pyc", line 30, in loadComponentModule
ImportError: cannot import module 'radiogroup


Cannot import module 'radiogroup' was the initial problem I was having.
 This is just a more detailed error message.



From steve at holdenweb.com  Sat Feb  5 07:48:16 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 05 Feb 2005 07:48:16 -0500
Subject: returning True, False or None
In-Reply-To: <8u6801pkc3m856jgh88cjb1f3dglqiqhbi@4ax.com>
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
	<PTOMd.103076$Jk5.19984@lakeread01>
	<8u6801pkc3m856jgh88cjb1f3dglqiqhbi@4ax.com>
Message-ID: <Bl3Nd.103624$Jk5.569@lakeread01>

Christos TZOTZIOY Georgiou wrote:

> On Fri, 04 Feb 2005 13:04:16 -0500, rumours say that Steve Holden
> <steve at holdenweb.com> might have written:
> 
> [STeVe]
> 
>>>For a given list:
>>>* If all values are None, the function should return None.
>>>* If at least one value is True, the function should return True.
>>>* Otherwise, the function should return False.
> 
> 
> [Stevbe]
> 
>>If you wanted to get clever you could write something like
>>
>>for i in True, False:
>>  if i in lst:
>>    return i
>>return False
> 
> 
> [!Steve]
> 
> You mistyped None as False in the last line.  Your typos are getting worse every
> day :)

That wasn't a *type*, it was a *thinko*

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From aleaxit at yahoo.com  Tue Feb  8 06:01:23 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Tue, 8 Feb 2005 12:01:23 +0100
Subject: empty classes as c structs?
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>
	<mailman.1973.1107618702.22381.python-list@python.org>
	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>
	<mailman.2006.1107658273.22381.python-list@python.org>
	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>
	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>
	<mailman.2049.1107750700.22381.python-list@python.org>
	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com>
	<4207606E.4040806@iinet.net.au> <cu8amb$ufa$1@sea.gmane.org>
	<mailman.2158.1107859833.22381.python-list@python.org>
Message-ID: <1grnyld.1t8l5kw1nr5aqsN%aleaxit@yahoo.com>

Nick Coghlan <ncoghlan at iinet.net.au> wrote:

> > We could use __add__, instead for combining namespaces
> 
> Update already let's us combine namespaces. To create a new object that merges
> two namespaces do:
>    namespace.update(namespace(ns_1), ns_2)

One thing I'd like to see in namespaces is _chaining_ -- keeping each
namespace separate but having lookups proceed along the chain.  (The
best semantics for _bindings_ as opposed to lookups isn't clear though).


Alex


From stefan.behnel-n05pAM at web.de  Wed Feb  2 09:58:31 2005
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 02 Feb 2005 15:58:31 +0100
Subject: Crashing Python interpreter! (windows XP, python2.3.4, 2.3.5rc1,
 2.4.0)
In-Reply-To: <mailman.1757.1107354582.22381.python-list@python.org>
References: <mailman.1757.1107354582.22381.python-list@python.org>
Message-ID: <ctqpqf$t2f$1@lnx107.hrz.tu-darmstadt.de>


Leeuw van der, Tim schrieb:
> I'm using the following combination of software:
> - Pydev Eclipse plugin (pydev 0.8.5)
> - eclipse 3.0.1 
> - windows XP SP1
> - pygtk 2.4.1
> - GTK 2.6.1 (for windows32 native)

First of all, try tightening the field. Are all of these packages needed to 
reproduce the error? Try to start the interpreter in a command line window and 
see if it happens there, too. That eliminates Eclipse.


> When trying to get a list of possible completions for the 'gtk' import object, the python interpreter crashes. Happens with all versions listed in the subject: python 2.3.4, 2.3.5rc1, 2.4.0.

Might be a problem with GTK for Windows, I don't know.

Type
import gtk
Does that crash? Or is it something like
dir(gtk)

Try different versions of GTK and pygtk. Look at the pygtk homepage to see 
which combination is known to work.

Stefan


From terti at mighty.co.za  Sat Feb 12 18:02:56 2005
From: terti at mighty.co.za (tertius)
Date: Sun, 13 Feb 2005 01:02:56 +0200
Subject: exec function
In-Reply-To: <1108245800.126709.8900@g14g2000cwa.googlegroups.com>
References: <1108245800.126709.8900@g14g2000cwa.googlegroups.com>
Message-ID: <JsKdnU6Mpq2uFpPfRVn-sA@is.co.za>

scottmallory at gmail.com wrote:

> I'm a newbie to pthyon and I am creating an app with wxPython.
> I have 7 tables (more on the way... they are feed from a database) that
> need to be formatted in a certain way (DataTable() does this) and I am
> just looking for a cleaner way to pass all of the Grids (grid_1,
> grid_2, etc) through the same function.
> I am currently doing this (ugly, but it works):
> 
> for i in tables.keys():
>     if datadict.has_key(i):
>          t = tables.get(i)
>          d = datadict.get(i)
>          r = rowdata.get(i)
>          exec('self.frame.%s.SetTable(DataTable(d, r[0]), True)' % t)
> 
> 
> It works (slowly) and I have read that exec is very slow and bad
> form...Can any one give me any pointers to clean this mess up?
> 
> frame = a wx.Frame (another file which is imported).
> 
> Thanks,
> Scott
> 
def getUniqueCustomer(self,idcustomer):             #,cols = "*"):
         sql = """select * from customer where idcustomer=%d"""%(idcustomer)
         self.db.sql_exec(sql)
         if self.db.crsr.rowcount == 0:
             return None
         cols = list([i[0] for i in self.db.crsr.description])
         vals = self.db.sql_fetchone()
         return  dict(zip(cols,vals))


From wittempj at hotmail.com  Thu Feb  3 17:01:15 2005
From: wittempj at hotmail.com (wittempj at hotmail.com)
Date: 3 Feb 2005 14:01:15 -0800
Subject: remove duplicates from list *preserving order*
In-Reply-To: <BfmdnTjWquaJEZ_fRVn-3A@comcast.com>
References: <BfmdnTjWquaJEZ_fRVn-3A@comcast.com>
Message-ID: <1107464469.629178.135880@l41g2000cwc.googlegroups.com>

You could create a class based on a list which takes a list as
argument, like this:
-class uniquelist(list):
-    def __init__(self, l):
-        for item in l:
-            self.append(item)
-
-    def append(self, item):
-        if item not in self:
-            list.append(self, item)
-
-l = [1, 1, 2, 3, 3, 4]
-print l
-m = uniquelist(l)
-print m

will print
py:[1, 1, 2, 3, 3, 4]
py:[1, 2, 3, 4]



From gustavo at grahal.net  Mon Feb 21 10:02:33 2005
From: gustavo at grahal.net (Gustavo Rahal)
Date: Mon, 21 Feb 2005 12:02:33 -0300
Subject: Platform independent adduser script?
In-Reply-To: <1108739886.550370.231620@g14g2000cwa.googlegroups.com>
References: <1108739886.550370.231620@g14g2000cwa.googlegroups.com>
Message-ID: <cvct1a$c21$1@sea.gmane.org>

Hi

On redhat you can use a libuser module that provides some highlevel 
system tasks.
redhat-tools use this module all the time.. look at some sources

Gustavo


morphex wrote:
> Hi there,
> 
> does anyone here know of a script that enables adding of users on UNIX
> platforms via python?
> 
> Thanks,
> 
> Morten
> 



From jepler at unpythonic.net  Thu Feb 24 08:49:47 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Thu, 24 Feb 2005 07:49:47 -0600
Subject: Attaching to a Python Interpreter a la Tcl
In-Reply-To: <1109155068.468295.121630@f14g2000cwb.googlegroups.com>
References: <1109155068.468295.121630@f14g2000cwb.googlegroups.com>
Message-ID: <20050224134947.GB21541@unpythonic.net>

Cameron Laird mentioned Tk's send working with Python; if you are writing your
app with Tkinter, here is some code to let you use tcl commands like
    send <appname> python <expression or statement>
for remote control.  You could build a more sophisticated front-end for this,
and you'll probably also want to add stuff like sending the text of an
exception as the result of the 'send' command.

Jeff

#------------------------------------------------------------------------
import Tkinter

__all__ = 'python', 'setup_send'
def makecommand(master, name, func, subst=None, needcleanup=0):
    f = Tkinter.CallWrapper(func, subst, master).__call__
    master.tk.createcommand(name, f)
    if needcleanup:
        if master._tclCommands is None:
            master._tclCommands = []
        master._tclCommands.append(name)
    return name


def setup_send(app, ns, name="python"):
    def python(*args):
        s = " ".join(args)
        print args
        try:
            code = compile(s, '<send>', 'eval')
            return eval(code, ns)
        except SyntaxError:
            code = compile(s, '<send>', 'exec')
            exec code in ns
    makecommand(app, name, python)

if __name__ == '__main__':
    app = Tkinter.Tk()
    setup_send(app, {})
    app.mainloop()
#------------------------------------------------------------------------
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From sjmachin at lexicon.net  Fri Feb 25 20:15:25 2005
From: sjmachin at lexicon.net (John Machin)
Date: 25 Feb 2005 17:15:25 -0800
Subject: fdups: calling for beta testers
In-Reply-To: <421f97eb$1@news.vo.lu>
References: <421f97eb$1@news.vo.lu>
Message-ID: <1109380525.262724.275780@g14g2000cwa.googlegroups.com>


Patrick Useldinger wrote:
>
> fdups' homepage is at http://www.homepages.lu/pu/fdups.html, where
> you'll also find a link to download the tar.
>

"""fdups has no installation program. Just change into a temporary
directory, and type "tar xfj fdups.tar.bz". You should also chown the
files according to your needs, and then copy the executables to your
PATH."""

(1) It's actually .bz2, not .bz (2) Why annoy people with the
not-widely-known bzip2 format just to save a few % of a 12KB file?? (3)
Typing that on Windows command line doesn't produce a useful result (4)
Haven't you heard of distutils?

(5) if files[subgroup[j]]['flag'] and files[subgroup[i]]['buffer'] ==
files[subgroup[j]]['buffer']:

That's not the most readable code I've ever seen.

(6) You are keeping open handles for all files of a given size -- have
you actually considered the possibility of an exception like this:
IOError: [Errno 24] Too many open files: 'foo509'

Once upon a time, max 20 open files was considered as generous as 640KB
of memory. Looks like Bill thinks 512 (open files, that is) is about
right these days.

(7)

!   def compare(self):
!        """ compare all files of the same size  - outer loop """
!        sizes=self.compfiles.keys()
!        sizes.sort()
!        for size in sizes:
!            self.comparefiles(size,self.compfiles[size])

Why sort? What's wrong with just two lines:

! for size, file_list in self.compfiles.iteritems():
!     self.comparefiles(size, file_list)

(8)     global
MIN_FILESIZE,MAX_ONEBUFFER,MAX_ALLBUFFERS,BLOCKSIZE,INODES

That doesn't sit very well with the 'everything must be in a class'
religion seemingly espoused by the following:

! class fDups:
!     """ encapsulates the whole logic """

(9) Any good reason why the "executables" don't have ".py" extensions
on their names?

All in all, a very poor "out-of-the-box" experience. Bear in mind that
very few Windows users would have even heard of bzip2, let alone have a
bzip2.exe on their machine. They wouldn't even be able to *open* the
box.
And what is "chown" -- any relation of Perl's "chomp"?



From ramen at lackingtalent.com  Thu Feb 17 15:36:28 2005
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Thu, 17 Feb 2005 13:36:28 -0700
Subject: namespace collisions
In-Reply-To: <4214e074$0$32617$db0fefd9@news.zen.co.uk>
References: <4214e074$0$32617$db0fefd9@news.zen.co.uk>
Message-ID: <Uf7Rd.6894$zs.3477@okepread04>

Will McGugan wrote:
> I'm accumulating a number of small functions, which I have sensibly put 
> in a single file called 'util.py'. But it occurs to me that with such a 
> generic name it could cause problems with other modules not written by 
> myself. Whats the best way of handling this? If I put it in a common 
> location in my Python path, should I call it willsutil.py?

I find that it's beneficial in the long run to create a package for your 
project. This will insure you against name collisions in general, should 
you later need to combine projects::

   import myproject.util
   myproject.util.myhandyfunction()
   etc.

The potential downside is that if you really need to reuse util.py in 
multiple projects, you'll have to copy the file to each package, or 
create a central package that the other projects' packages link to. But 
it's been my experience that the type of stuff that goes in "util" 
modules is pretty miscellaneous in nature, and not as reusable as it 
seems. Not worth creating additional dependencies, anyway.

There's really no one right answer to your question, but I've been 
(mildly) bitten by naming collisions, and as a result I use packages for 
every project now.

Dave


From tjreedy at udel.edu  Wed Feb  2 19:10:43 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 2 Feb 2005 19:10:43 -0500
Subject: Is this a contradiction in the docs ?
References: <1107342032.273119.194120@o13g2000cwo.googlegroups.com>
Message-ID: <ctrq52$7pu$1@sea.gmane.org>


"Fuzzyman" <fuzzyman at gmail.com> wrote in message 
news:1107342032.273119.194120 at o13g2000cwo.googlegroups.com...
> Equally possible (or more likely !) is that I misunderstand it :

Or that you did not sufficiently test the indicated difference ;-)

> The docs for compile say that if you are creating a code object from a
> sequence of statements you must use the kind argument 'exec'. Eval says
> that if you are using the eval function you must use 'eval' as your
> kind argument.

And I believe that if you use the eval function as a function, rather than 
as a subroutine, the latter *is* true.

 > In practise I have found that using the eval function with code objects
> compiled with 'exec' as the kind argument works fine.

A minimal code example backing your claim would have been illuminative.
Eval'ing exec-compiled expressions does NOT work fine, as least not in 2.2, 
and, I suspect, in all other versions:

>>> def test():
...   print 'in test'
...   return 1
...
>>> coex = compile('test()', '', 'exec')
>>> coev = compile('test()', '', 'eval')
>>> print eval(coex)
in test
None    # wrong due to exex-compile-eval mismatch bug
>>> print eval(coev)
in test
1

The compile flag affects the code generation, but it does not get attached 
to the resulting code object.  Eval runs the code object without knowing 
whether the correct flag was used.  Therefore, 'must use the correct flag' 
means 'must, in order to get correct functioning' (in particular, the 
return of the expression value rather than None), and not 'must, in order 
to run at all'.  A 'practise' that only tests running and ignores incorrect 
value returning is not a complete test.

Terry J. Reedy







From paddy3118 at netscape.net  Wed Feb 23 00:32:16 2005
From: paddy3118 at netscape.net (Paddy)
Date: 22 Feb 2005 21:32:16 -0800
Subject: On eval and its substitution of globals
References: <1108828170.372593.150790@g14g2000cwa.googlegroups.com>
Message-ID: <1109136736.670038.236040@z14g2000cwz.googlegroups.com>

I have had no reply so on revisiting this I thought I would re-submit
it  and point out that there is a question way down at the end :-)

Thanks.

===== Original Post =====
Hi,
I got tripped up on the way eval works with respect to modules and
so wrote a test.

It seems that a function carries around knowledge of the globals()
present
when it was defined. (The .func_globals attribute)?

When evaluated using eval(...) the embedded globals can be overridden
with
the one passed through the eval(...) call

If however you create a new function that calls the first then eval's
global argument is only substituted in the outer call!

TEST:
=====

Python 2.4 (#2, Jan  8 2005, 20:18:03)
[GCC 3.3.5 (Debian 1:3.3.5-5)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> globals().has_key('A')
False
>>> globals().has_key('B')
False
>>> def f1(): return A < B
...
>>> def z(): return f1()
...
>>> eval(f1.func_code,dict(A=1,B=2))
True
>>> eval(z.func_code,dict(A=1,B=2, f1=f1))

Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 1, in z
  File "<stdin>", line 1, in f1
NameError: global name 'A' is not defined


ENDTEST
=======

Is there a way to do a deep substitution of the globals?

I should add that f1 is given as-is. I can modify z,
and f1 is just one of many functions given and function z
is some boolean function of the f<n>'s

Thanks, Pad.



From rbt at athop1.ath.vt.edu  Fri Feb  4 14:38:55 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Fri, 04 Feb 2005 14:38:55 -0500
Subject: string issue
In-Reply-To: <mailman.1909.1107545682.22381.python-list@python.org>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
	<mailman.1909.1107545682.22381.python-list@python.org>
Message-ID: <cu0j0f$kf7$1@solaris.cc.vt.edu>

Thanks guys... list comprehension it is!

Bill Mill wrote:
> On Fri, 04 Feb 2005 14:23:36 -0500, rbt <rbt at athop1.ath.vt.edu> wrote:
> 
>>Either I'm crazy and I'm missing the obvious here or there is something
>>wrong with this code. Element 5 of this list says it doesn't contain the
>>string 255, when that's *ALL* it contains... why would it think that???
>>
>>import time
>>
>>ips = ['255.255.255.255', '128.173.120.79', '198.82.247.98',
>>'127.0.0.1', '255.0.0.0', '255', '128.173.255.34']
>>
>>for ip in ips:
>>     if '255' in ip:
>>         try:
>>             print "Removing", ip
>>             ips.remove(ip)
>>         except Exception, e:
>>             print e
>>
>>print ips
>>time.sleep(5)
>>
> 
> 
> You're gong crazy:
> 
> 
>>>>ips = ['255.255.255.255', '128.173.120.79', '198.82.247.98',
> 
> ... '127.0.0.1', '255.0.0.0', '255', '128.173.255.34']
> 
>>>>for ip in ips:
> 
> ...     if '255' in ip: print ip
> ...
> 255.255.255.255
> 255.0.0.0
> 255
> 128.173.255.34
> 
> The problem is that you're operating in-place on an array while it's
> being iterated over. Since the iterator is only created once, you're
> can't change the array while you're iterating over it. Instead, try a
> list comprehension:
> 
> 
>>>>ips = [ip for ip in ips if '255' not in ip]
>>>>ips
> 
> ['128.173.120.79', '198.82.247.98', '127.0.0.1']
> 
> Peace
> Bill Mill
> bill.mill at gmail.com


From jepler at unpythonic.net  Mon Feb 14 19:28:31 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 14 Feb 2005 18:28:31 -0600
Subject: 64 bit Python
In-Reply-To: <1cd7e2-qu7.ln1@valpo.de>
References: <1cd7e2-qu7.ln1@valpo.de>
Message-ID: <20050215002831.GB6339@unpythonic.net>

There's not enough information to guess the "real problem", but it could
be this:

"variable size" objects (declared with PyObject_VAR_HEAD) are limited to
INT_MAX items since the ob_size field is declared as 'int'.

This means that a Python string, tuple, or list (among other types) may
be limited to about 2 billion items on ILP32 and LP64 architectures.

Dicts and probably sets are also limited to INT_MAX elements, because
the "ma_fill" and "ma_used" fields are ints.

If you don't mind recompiling all your extensions, you could change the
type of ob_size to long in the "#define PyObject_VAR_HEAD".  I don't
know what breaks when you do this, but maybe a few google or google
groups searches could help you find others who have tried this.

Jeff
PS the limit of 500MB of "real data" in the 32-bit system may be because
a realloc may temporarily require (old size + new size) storage when it
does the equivalent of
    new_ptr = malloc(new_size)
    memcpy(new_ptr, old_ptr, old_size)
    free(old_size)
which will temporarily use >900MB of data when resizing a ~450MB object.
Python frequently uses realloc() to grow structures like lists.  If you
are working with strings, then
    s = s + t
doesn't ever use realloc (in 2.3.x anyway) but always allocates and
fills the result 's+t', only freeing the old value of s later when it is
no longer reacahable (which could be as soon as the assignment statement
completes)
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From ranjithgp at gmail.com  Sat Feb  5 05:53:23 2005
From: ranjithgp at gmail.com (ranjith g p)
Date: 5 Feb 2005 02:53:23 -0800
Subject: An interesting python problem using Zope 2.7.3
Message-ID: <2f00792c.0502050253.d8f1997@posting.google.com>

Greetings!!!

I ran the following simple string commands in Linux + Python and the results are:

[root at localhost root]# python
Python 2.2.2 (#1, Feb 24 2003, 19:13:11)
[GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> "<a>A"
'<a>A'
>>> "<a>A/"
'<a>A/'
>>> "A</>"
'A</>'
>>>


Now when the same is run from Zope273 + python + Linux or windows,
the results are,

1.  '<a>A'
2.   A/
3.  A    
 

respectively. Any suggestions?

thanx


From stephen.thorne at gmail.com  Wed Feb  2 17:56:35 2005
From: stephen.thorne at gmail.com (Stephen Thorne)
Date: Thu, 3 Feb 2005 08:56:35 +1000
Subject: Python's idiom for function overloads
In-Reply-To: <87lla6386k.fsf@sme.intra.citec.fi>
References: <mailman.1677.1107230965.22381.python-list@python.org>
	<41ff066c$0$6473$636a15ce@news.free.fr>
	<87lla6386k.fsf@sme.intra.citec.fi>
Message-ID: <3e8ca5c805020214567666a1d3@mail.gmail.com>

On Wed, 02 Feb 2005 14:45:35 -0800 (PST), Simo Melenius
<firstname.lastname at iki.fi-spam> wrote:
> Philippe Fremy <phil at freehackers.org> writes:
> 
> > You can not reproduce the C++ overload idiom but you can get something
> > close with manual type testing.
> >
> >  > To in a
> >  > function do an if statement with the type() function?
> >
> > I am not aware of any other method.
> >
> > def a( arg1 ):
> >       if type(arg1) == types.IntType: return aWithInt(arg1)
> >       if type(arg1) == types.ListType: return aWithList(arg1)
> >       ...
> 
> Or:
> 
> def a_overloader (arg1):
>     return my_typed_a_func_dict[type (arg1)] (arg1)
> 
> Next I'd put my hands in automating the creation of these wrappers and
> the my_typed_a_func_dict map based on my implementation written so
> far. Then I'd think of parameterizing on any arbitrary destructuring
> of arguments like def foo ((a,b), c) and also on classes to which
> instance methods are bound to. At this point, a preprocessor might be
> handy to avoid seeing all the internals after which things would
> probably start looking sick enough to either switch languages or
> thinking of the right problem first and then come up with a pythonic
> solution to _that_.

Pah.

Use a decorator. 

Code is available here:
Jack Diederich posted a good multimethod snippet here, in response to
my own clumsy effort.

http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/5b50153e3fb84862
http://tinyurl.com/4awat

type(arg1) == types.IntType
def multi_type(t):
  return multi(lambda x:type(x) == t)

@multi_type(types.IntType)
def foo(x):
  return someOperationOnInt(x)

@multi_type(types.FloatType)
def foo(x):
  return someOperationOnFloat(x)

Regards,
Stephen Thorne.

"Just because it is possible doesn't make a good idea *wink*", 
-Jack Diederich, Aug 2004


From spam at nospam.org  Wed Feb  2 22:15:53 2005
From: spam at nospam.org (Erik Johnson)
Date: Wed, 2 Feb 2005 20:15:53 -0700
Subject: Easy Q: dealing with object type
References: <420181b1$1@nntp.zianet.com>
	<1107396669.028096.301290@g14g2000cwa.googlegroups.com>
Message-ID: <42019545$1@nntp.zianet.com>


"Erick" <idadesub at gmail.com> wrote in message
news:1107396669.028096.301290 at g14g2000cwa.googlegroups.com...
> Ah, you're running into the "old-style classes vs. new style classes".
> Try subclassing from "object".
>
> For example:
>
> >>> class A(object):

That works! :) I guess I am fortunate to be running 2.2 - looks kinda ugly
prior to that.

> Check out the following article, it should answer your questions:
>
http://www.python.org/doc/2.2.3/whatsnew/sect-rellinks.html#SECTION000310000000000000000


Thank you both for your replies! :)
-ej




From fperez.net at gmail.com  Sat Feb  5 13:07:40 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Sat, 05 Feb 2005 11:07:40 -0700
Subject: IDLE history, Python IDE, and Interactive Python with Vim
References: <opsllommgvb1cml1@ashot>
Message-ID: <cu31vl$ap4$1@sea.gmane.org>

Hi,

Ashot wrote:

> This is sort of both Python and Vim related (which is why I've posted to
> both newsgroups).

[...]

I know you've been using ipython recently (the readline color bugs), so perhaps
my reply is a bit redundant.  Forgive me if that's the case, I just want to
give you some useful info.

Just in case you haven't come across these features (the manual is kind of long
and dry), I should note that ipython has pretty much everything you've asked
for here.  %hist -n dumps your history without line numbers (for copy/paste),
%logstart gives you an incremental log (valid python code) of your current
session, %save allows you to save a selected group of lines to a file, and
%edit will open up $EDITOR (or vi in Unix by default) at the source of any
accessible object.  With %pdb, you can even trigger automatically pdb at any
uncaught exception (in Emacs, you'll even get the source simultaneously opened, 
I'm sure something similar could be done for vi).

Ipython is not an IDE, but it does offer an extensible command-line environment
which tries hard to be very efficient.  Hopefully this year I'll be able to
work on integrating it (optionally, since it will never lose its command-line
functionality) with GUIs as well.

Regards,

f



From idadesub at gmail.com  Wed Feb  2 21:08:07 2005
From: idadesub at gmail.com (Erick)
Date: 2 Feb 2005 18:08:07 -0800
Subject: Easy Q: dealing with object type
References: <420181b1$1@nntp.zianet.com>
Message-ID: <1107396487.885136.311110@z14g2000cwz.googlegroups.com>

Ah, you're running into the "old-style classes vs. new style classes".
Try subclassing from "object".

For example:

>>> class A(object):
...   pass
...
>>> a=A()
>>> type(a)
<class '__main__.A'>
>>> type(a) == A
True
>>> type(a) is A
True
>>> b=A()
>>> type(a) == type(b)
True
>>> type(a) is type(b)
True


Check out the following article, it should answer your questions:
http://www.python.org/doc/2.2.3/whatsnew/sect-rellinks.html#SECTION000310000000000000000
-e



From tdickenson at devmail.geminidataloggers.co.uk  Wed Feb  9 05:32:20 2005
From: tdickenson at devmail.geminidataloggers.co.uk (Toby Dickenson)
Date: Wed, 9 Feb 2005 10:32:20 +0000
Subject: python connect to server using SSH protocol
In-Reply-To: <4208bdfa$1@sia.uibk.ac.at>
References: <1107850655.289129.94880@o13g2000cwo.googlegroups.com>
	<mailman.2174.1107867553.22381.python-list@python.org>
	<4208bdfa$1@sia.uibk.ac.at>
Message-ID: <200502091032.20834.tdickenson@devmail.geminidataloggers.co.uk>

On Tuesday 08 February 2005 13:26, Simon Anders wrote:

> This is what I was about to reply as well. But I did a short test 
> program and encountered a problem:
> 
> import os
> fi, foe = os.popen4 ('ssh dopey')
> print >>fi, 'ls'
> fi.close ()  # <-- this is annoying
> for line in foe:
>     print line,
> foe.close ()
> 
> The above connects to a server, passes the command 'ls', which is 
> executed there, and prints the returned result.
> 
> However, reading from foe succeeds only if fin has been closed before. 
> An fi.flush() seems to be not sufficient. 

But this version below does work. Im not sure whats happening when using the 
file as an iterator to make a difference.

import os, sys
fi, foe = os.popen4 ('ssh xxxxx')
print >>fi, 'ls'
fi.flush ()  # <-- this is annoying
while 1:
    b = foe.readline()
    sys.stdout.write(b)


> But if one wants Python to  
> interactivly communicate with some shell on a remote machine, it is 
> inconvenient to have to close and reopen the connection all the time.

But this route carries a big deadlock risk. the rsync program can tunnel over 
ssh this way, but have first hand experience of
http://www.google.com/search?q=rsync+ssh+deadlock

In the script above, if 'ls' is replaced with a longer input then there is 
every chance that the fi stream will block before all of it is written, 
because this script hasnt started draining foe.

For a real python program using ssh (but not 'interactive'... data written to 
fi does not depend on data read from foe) see
http://dirstorage.sourceforge.net/replica.html
-- 
Toby Dickenson


From sh_snyder at yahoo.com  Fri Feb 18 21:02:18 2005
From: sh_snyder at yahoo.com (scott)
Date: 18 Feb 2005 18:02:18 -0800
Subject: Matplotlib, py2exe and pytz
Message-ID: <1108776896.490620.249130@f14g2000cwb.googlegroups.com>

I am trying to convert a python app that uses matplotlib to a
standalone executable using py2exe.

After running py2exe and executing my app I get the following stack
trace:

Traceback (most recent call last):
  File "gcToCsv.py", line 5, in ?
  File "plot_output.pyc", line 1, in ?
  File "pylab.pyc", line 1, in ?
  File "matplotlib\pylab.pyc", line 194, in ?
  File "matplotlib\axes.pyc", line 46, in ?
  File "matplotlib\dates.pyc", line 94, in ?
  File "pytz\__init__.pyc", line 53, in timezone
KeyError: 'UTC'

It appears that the instructions on the matplotlib web site and wiki
are incomplete and the pytz.zoneinfo package is not being included in
the finished dist directory.

I tried adding an opt line to setup.py
opts = {"py2exe": {"packages": ["pytz\zoneinfo"] } }
but still no joy.

Can someone tell me the correct setup.py file to use for including
matplotlib with an app using py2exe?

Thanks,

Scott



From fredrik at pythonware.com  Thu Feb 10 02:47:44 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 10 Feb 2005 08:47:44 +0100
Subject: Testing conditions.
References: <cues7q$mg7$1@news7.svr.pol.co.uk>
Message-ID: <cuf3fa$q14$1@sea.gmane.org>

Ray Gibbon wrote:

> This is NOT another request for statements to be accepted as expressions for
> two reasons:-
> 1. I've seen enough arguments on the subject where I've found myself firmly
> on the anti change side.
> 2. I now realise that it might scratch the itch, but it would not cure it.
>
> e.g. 1
> |    while new_data = get_more_data(source):
> |        process_data(new_data)
>
> is obviously the sort of thing I'm missing, but it is not a general solution
> because :-
>
> e.g. 2
> |    while new_data, environment = get_more_data(source):
> |        process_data(new_data, environment)
>
> is something I'm equally likely to want to do, but I can't express it's
> meaning.

that's spelled

    for new_data, environment in get_data(source):
        process_data(new_data, environment)

in Python.  if you have existing get_first_data and get_more_data
functions, add a wrapper function:

    def get_data(source):
        data = get_first_data(source)
        while data:
            yield data
            data = get_more_data(source)

</F> 





From dalke at dalkescientific.com  Mon Feb 28 21:27:03 2005
From: dalke at dalkescientific.com (Andrew Dalke)
Date: Tue, 01 Mar 2005 02:27:03 GMT
Subject: accessor/mutator functions
References: <slrnd25qu6.cvr.nick@irishsea.home.craig-wood.com>
	<m2wtssl88h.fsf@unique.fully.qualified.domain.name.yeah.right>
	<pan.2005.02.28.23.08.23.223910@dalkescientific.com>
	<m2mztokzxo.fsf@unique.fully.qualified.domain.name.yeah.right>
Message-ID: <pan.2005.03.01.02.27.22.202606@dalkescientific.com>

Me:
>> What's wrong with the use of attributes in this case and how
>> would you write your interface?

Dan Sommers:
> I think I'd add a change_temperature_to method that accepts the target
> temperature and some sort of timing information, depending on how the
> rest of the program and/or thread is structured.

Hmmm.  I wonder if this is mostly a question of how the
process decomposition occurs.  I think in objects ("thingys
with state") whereas you think in tasks ("thingys that do stuff")?
I say that somewhat surprisingly in that I'm not a deep OO
person - functions are fine with me and I don't like the
Java/Ruby "everything is in a class" world view.

> It might turn into two
> or three methods, depending on whether I can afford to block while
> waiting, or what kind of intermediate feedback and/or error handling I
> want (or one method with some carefully chosen default arguments).

In the case I'm hypothesizing (haven't worked with a temperature
controller in about 15 years) it's hard to put a layer above
everything because there could be so many different protocols
(chemical protocols, not I/O ones) with different rates.  Eg,
it could be an exponential decay, or step-wise approximation
thereof.

The note about errors is interesting.  For example, if the
cable to the controller was disconnected then someone, especially
someone used to memory lookups for attributes, might not expect

  temp_controller.current

to possibly raise an I/O error exception.  On the other hand,
at the C level that could be memory mapped I/O, so that

  int x = temp_controller.current;

could also have all sorts of side effects.  That case
is dangerous in C because of its poor exception mechanism.
I think in Python it's much less of a problem.


> I don't know how that device driver works, but it might look something
> like this:
> 
>     def change_temperature_to( self, target, seconds_between_checks ):
>         print 'target temperature:', target
>         tell_the_device_to_change( )
>         while 1:
>             current = read_the_temperature_from_the_device( )
>             print 'current temperature:', current
>             if abs( current - target ) < 0.1:
>                 break
>             time.sleep( seconds_between_checks )

Your "tell_the_device_to_change" is my "self.target" and your
"read_the_temperature_from_the_device" is "self.current_temperature".
In some sense it comes down to style.

BTW, had I done this for real I would have two layers, one
which is communications oriented ("send 'get current temperature'
message to device") and my object model which uses the messaging
interface underneath.

>  I think part of my thinking
> comes from my old Pascal days, when it made me cringe to think that
> "x:=b;" might actually execute a subroutine rather than just copy some
> memory around.

To give a more recent example for me, which I covered here some
years back, I wrote an OO interface to an "OO-ish" C library
for doing chemistry.  In the data model, atoms have an atomic
symbol, a charge and a list of bonds (and many other things).
Bonds have a bond type and the two atoms at the ends of the bonds
(and many other things).

I liked being able to say:

print atom.symbol, "with charge", atom.charge, "has", \
      len(atom.bonds), "bonds"

for i, bond in enumerate(bonds):
  print "bond", i, "has type", bond.bondtype

To me this is a very natural way of querying the data and
traversing the data structure.

Now underneath the covers it looks like this:

  atom.charge fails so use __getattr__(atom, "charge")
  __getattr__ uses a dispatch table to get the underlying C function
      which is "dt_getcharge"
  return dt_getcharge(self.handle)

where "handle" is the handle used by the C library.

I figured though that this example might be more esoteric
than my PID controller example, though in retrospect it
looks like it might be a better justification.

			Andrew
			dalke at dalkescientific.com



From jgrahn-nntq at algonet.se  Sun Feb  6 13:30:43 2005
From: jgrahn-nntq at algonet.se (Jorgen Grahn)
Date: 6 Feb 2005 18:30:43 GMT
Subject: Python versus Perl ?
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
Message-ID: <slrnd0cofg.rr5.jgrahn-nntq@frailea.sa.invalid>

On 6 Feb 2005 05:19:09 -0800, surfunbear at yahoo.com <surfunbear at yahoo.com> wrote:
...
>  I'm a software engineer, familiar with C++ objected oriented
> development, but have been using Perl because it is great for pattern
> matching, text processing, and automated testing. Our company is really
> fixated on risk managnemt and the only way I can do enough testing
> without working overtime (which some people have ended up doing) is by
> automating my testing. That's what got me started on Perl.
> 
>  I've read that many people prefer Python and that it is better than
> Perl. However, I want to ask a few other questions.

I could go on and on, but this essay by Eric Raymond says it better:

  http://www.linuxjournal.com/article/3882

> 3. Perl is installed on our system and alot of other systems.
> You don't have to make sys admins go out of there way to make it
> available. It's usualy allready there.

Python is in most Linux installations ... but it's much more rare than perl
elsewhere. Yes, this is a reason to write smaller text-processing and
automation hacks in perl.

/Jorgen

-- 
  // Jorgen Grahn <jgrahn@       Ph'nglui mglw'nafh Cthulhu
\X/                algonet.se>   R'lyeh wgah'nagl fhtagn!


From jao at geophile.com  Sat Feb 26 21:23:51 2005
From: jao at geophile.com (Jack Orenstein)
Date: Sat, 26 Feb 2005 21:23:51 -0500
Subject: Thread scheduling
In-Reply-To: <G_WdnU5rv57SsbzfRVn-vg@powergate.ca>
References: <1109456481.214243.140670@l41g2000cwc.googlegroups.com>	<mailman.3100.1109457191.22381.python-list@python.org>	<09Kdndga9dgQkrzfRVn-hg@powergate.ca>	<mailman.3103.1109465231.22381.python-list@python.org>
	<G_WdnU5rv57SsbzfRVn-vg@powergate.ca>
Message-ID: <42212F37.8080905@geophile.com>

> On my machines (one Py2.4 on WinXP, one Py2.3.4 on RH9.0) I don't
> see this behaviour.  Across about fifty runs each.

Thanks for trying this.

> One thing you might try is experimenting with sys.setcheckinterval(),
> just to see what effect it might have, if any.

That does seem to have an impact. At 0, the problem was completely
reproducible. At 100, I couldn't get it to occur.

> 
> It's also possible there were some threading bugs in Py2.2 under
> Linux.  Maybe you could repeat the test with a more recent
> version and see if you get different behaviour.  (Not that that
> proves anything conclusively, but at least it might be a good
> solution for your immediate problem.)

2.3 (on the same machine) does seem better, even with setcheckinterval(0).

Thanks for your suggestions.

Can anyone with knowledge of Python internals comment on these results?
(Look earlier in the thread for details. But basically, a very simple
program with the thread module, running two threads, shows that on
occasion, one thread finishes and the other never runs again. python2.3
seems better, as does python2.2 with  sys.setcheckinterval(100).)

Jack


From administrata at hotmail.com  Tue Feb 15 05:13:34 2005
From: administrata at hotmail.com (administrata)
Date: 15 Feb 2005 02:13:34 -0800
Subject: [NewBie] Tut0r Thing
References: <614c778e.0502141413.6b19c091@posting.google.com>
	<mailman.2579.1108419986.22381.python-list@python.org>
	<curbsq$qh5$1@agate.berkeley.edu>
Message-ID: <614c778e.0502150213.51250b94@posting.google.com>

Daniel Yoo <dyoo at hkn.eecs.berkeley.edu> wrote in message news:<curbsq$qh5$1 at agate.berkeley.edu>...
> : if you're talking about the "tutor at python.org" mailing list, it's a mailing list
> : that you send mail to and get mails from, as explained on the tutor mailing
> : list page:
> 
> :    http://mail.python.org/mailman/listinfo/tutor
> 
> 
> Hello,
> 
> Also, from the odd spelling of the subject line, I suspect that the
> original poster thinks that we're some kind of cracking group.
> 
> 
> I hope not, but just to make sure it's clear: when we in the Python
> community talk about "hacking", we usually mean it in the constructive
> sense: we like building software systems and helping people learn how
> to program.
> 
> ESR has a good summary here:
> 
>     http://www.catb.org/~esr/faqs/hacker-howto.html#what_is
> 
> I always feel silly about bringing this up, but it has to be said,
> just to avoid any misunderstanding.
> 
> 
> Best of wishes to you.

I'm not clever to hack though, :)


From stephen.thorne at gmail.com  Wed Feb 16 01:38:03 2005
From: stephen.thorne at gmail.com (Stephen Thorne)
Date: Wed, 16 Feb 2005 16:38:03 +1000
Subject: "perl -p -i -e" trick in Python?
In-Reply-To: <cuuol5$2ri$1@news1.kornet.net>
References: <cuuol5$2ri$1@news1.kornet.net>
Message-ID: <3e8ca5c8050215223851664ca5@mail.gmail.com>

On Wed, 16 Feb 2005 15:18:57 +0900, Wonjae Lee <shotgunlee at hotmail.com> wrote:
> I read the comment of
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/277753.
> (Title : Find and replace string in all files in a directory)
> 
> "perl -p -i -e 's/change this/..to this/g'" trick looks handy.
> Does Python have a similar trick? Or, is there a shorter Python recipe for
> the given problem?

sure.

python -c 'import os; os.system("sed -i s/change this/...tothis/g")'

Using-the-right-tool-for-the-job-ly-y'rs
Stephen


From ncoghlan at iinet.net.au  Mon Feb 14 07:27:18 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Mon, 14 Feb 2005 22:27:18 +1000
Subject: [PATCH] allow partial replace in string.Template
In-Reply-To: <cuq0dl$opq$1@lnx107.hrz.tu-darmstadt.de>
References: <cuq0dl$opq$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <42109926.4050205@iinet.net.au>


a) Patches are more likely to be looked at if placed on the SF patch tracker.

b) I don't quite see the point, given how easy these are to spell using the 
basic safe_substitute. You're replacing one liners with one-liners.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From jeff at ccvcorp.com  Wed Feb 16 13:19:22 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Wed, 16 Feb 2005 10:19:22 -0800
Subject: renaming 'references' to functions can give recursive problems
In-Reply-To: <1108573114.574794.201470@g14g2000cwa.googlegroups.com>
References: <1108565645.179340.70600@o13g2000cwo.googlegroups.com>
	<slrnd16pt6.enl.apardon@rcpc42.vub.ac.be>
	<1108573114.574794.201470@g14g2000cwa.googlegroups.com>
Message-ID: <11173j77ooi80bb@corp.supernews.com>

peter wrote:

> Hello, nice solution:
> but it puzzles me :)
> 
> can anyone tell me why
> -----------correct solution----------------
> def fA(input):
>   return input
> 
> def newFA(input, f= fA):
>    return f(input)

This saves a reference to the original function in the new function's 
default argument.

> -------------infinite loop-----------------
> 
> def fA(input):
>   return input
> 
> def newFA(input):
>    return fA(input)

This does not save any reference to the original function; it simply 
does a run-time lookup of the name, and uses whatever object is 
currently bound to that name.  Since you later rebind the name to this 
new function, it's simply calling itself.

Jeff Shannon
Technician/Programmer
Credit International




From jepler at unpythonic.net  Sat Feb 12 17:17:28 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Sat, 12 Feb 2005 16:17:28 -0600
Subject: exec function
In-Reply-To: <1108245800.126709.8900@g14g2000cwa.googlegroups.com>
References: <1108245800.126709.8900@g14g2000cwa.googlegroups.com>
Message-ID: <20050212221726.GA24076@unpythonic.net>

In this case, you can use getattr() instead of the exec statement:
    getattr(self.frame, t).SetTable(DataTable(d, r[0]), True)

Jeff
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From http  Thu Feb  3 23:50:16 2005
From: http (Paul Rubin)
Date: 03 Feb 2005 20:50:16 -0800
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
	<7xy8e5jagh.fsf@ruckus.brouhaha.com>
	<pan.2005.02.03.23.34.45.544501@jerf.org>
Message-ID: <7xis59nd2v.fsf@ruckus.brouhaha.com>

Jeremy Bowers <jerf at jerf.org> writes:
> > Hmm, I'm not familiar with Nevow.  Twisted is pretty neat, though
> > confusing.  I don't see how to scale it to multiple servers though.
> 
> Same way you'd scale any webserver, load balancing in hardware, store all
> user state in a database, and tell the load balancer to try to "persist"
> a user's connection to a machine, so Twisted doesn't even have to go back
> to the server then?

I understood the Twisted suggestion as meaning avoiding database
traffic by keeping both user and server state resident in the
application.  Yes, if you use a database for that, you get multiple
app servers instead of a heavily loaded centralized one.  But you now
have a heavily loaded centralized database server instead.  You
haven't really solved your scaling problem, you've just moved it back
a layer.


From tjreedy at udel.edu  Sat Feb  5 17:54:02 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 5 Feb 2005 17:54:02 -0500
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
References: <ctsjmg$75p$1@usenet.otenet.gr><pan.2005.02.03.19.10.39.349763@jerf.org>
	<cu2m3q$km1$1@usenet.otenet.gr>
Message-ID: <cu3iod$8q6$1@sea.gmane.org>


"Ilias Lazaridis" <ilias at lazaridis.com> wrote in message 
news:cu2m3q$km1$1 at usenet.otenet.gr...

If you ask too much that other people do your searching for you, answers 
will dry up.  But here are a couple that you might not find on google 
anyway, at least not easily.

> I want to add metadata to everything within my design (functions, data,
> classes, ...), if possible with a standard way.

You can annotate, by adding attributes to, modules, functions, classes, and 
class instances.  You can not directly do so with 'basic' types: numbers, 
sequences, and dicts -- and some others.  You can, however, either extend 
or wrap anything with your own classes to get something you can annotate 
(but don't ask me for the details).

> I want to generate things (code, txt, html etc.) out of my object-model,
>  whilst using with a flexible generator, if possible a standard one.

One standard way to generate text from objects is to use custom classes, 
each with a custom __str__ method.  Assuming you have a hierachical model 
without loops, each such method can recursively call each data attribute 
object of the instancefor it to generate its substring.  (With loops you 
need a loop-cutting mechanism to prevent infinite recursion.)  I know this 
has been done for html (but again, I won't google for you).  Define a class 
for each type of element and give each instance a list of element instances 
it contains.  Then 'print html_doc_instance' can print the html doc 
corresponding to the object model.

Like others, I recommend you spend a day with Python if you wish to learn 
more.

Terry J. Reedy






From olivier.ravard at novagrid.com  Wed Feb  2 06:35:08 2005
From: olivier.ravard at novagrid.com (Olivier Ravard)
Date: Wed, 2 Feb 2005 12:35:08 +0100
Subject: python and visual C++
Message-ID: <ctqdtb$lm7$1@news.univ-rennes1.fr>

Hi,

When I tryed to compile a python module using distutils under windows,
and there is an error message if we do not have Microsoft Visual C++ 6
installed.
This is because python have been compiled with MSVC6 and distutils wants it
in order to compile C++ python modules.

One of the reasons why I use python is because this is a free language. But
I need
a non free compilator to compile my C++ module !!! Choosing MSVC to compile
python is a strange choice since there are other free compilators like
MinGW.

I think that using another compilator should be possible in order to compile
python
modules since I use BOOST/MinGW to develop my own modules...

Diffrerent solutions appears :
    - peoples who compile python for windows should use a free compilator
        (MinGW or Microsoft Visual C++ Toolkit 2003 for example)
    - modify distutils in order to use another compilator

Is there anyone that have experienced this "free" problem and is there a
solution
that I did not note. I don't want to buy MSVC...

Thanks

O.R.





From steve at holdenweb.com  Wed Feb  2 07:41:00 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 02 Feb 2005 07:41:00 -0500
Subject: type of simple object
In-Reply-To: <42008044$0$14171$626a14ce@news.free.fr>
References: <1107255752.258025.50870@z14g2000cwz.googlegroups.com>
	<1107257264.146280.89560@c13g2000cwb.googlegroups.com>
	<1107258136.815344.145380@c13g2000cwb.googlegroups.com>
	<tyfy8e8lcef.fsf@pcepsft001.cern.ch>
	<1107261198.943087.80960@z14g2000cwz.googlegroups.com>
	<42008044$0$14171$626a14ce@news.free.fr>
Message-ID: <DY3Md.102584$Jk5.85065@lakeread01>

Pierre Barbier de Reuille wrote:

> ajikoe at gmail.com a ?crit :
> 
>> Thank you guys.
>>
>> My function should multiply every element  of a list, for example
>> "something"
>> and "something" can be an integer or another list.
>> If it deals with integer than it is ok, but
>> If it deals with list than it become false for example list*2 =
>> listlist, and what I really want is to mutlitply its member.
>> That's why I need to know the type of my data in "something".
> 
> 
> As stated by another comment, I would do something like :
> 
> def multiply(object, factor):
>   try:
>     return [ multiply(i,factor) for i in object ]
>   except TypeError:
>     return object*factor
> 
> This function will, recursively multiply a nested list of numbers by 
> "factor" ...
> 
As a matter of good practice it's usually considered unwise to shadow 
names of system types like "dict" and "object", though there wouldn't be 
any problems in this case except the infinite recursion. Which 
definitely *would* be a problem.

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005          http://www.python.org/pycon/2005/
Steve Holden                           http://www.holdenweb.com/


From lee at example.com  Thu Feb  3 17:49:58 2005
From: lee at example.com (Lee Harr)
Date: Thu, 03 Feb 2005 22:49:58 GMT
Subject: About standard library improvement
References: <mailman.1831.1107455790.22381.python-list@python.org>
	<4kuMd.102708$Jk5.100022@lakeread01>
	<mailman.1849.1107470297.22381.python-list@python.org>
Message-ID: <qUxMd.3494$4D3.485@news02.roc.ny>

On 2005-02-03, BJ?rn Lindqvist <bjourne at gmail.com> wrote:
> The process seem slow. I've submitted two patches and haven't gotten
> any response so far, but it has only been three weeks. Other patches
> seem to be idling for months. I'm not complaining, just want to know
> why the process is so slow and what you can do when you submit
> patches/bug reports to speed it up?
>

I am certainly no expert, but I follow the lists. I recall
reading something recently that a lot of the logjam is the
need for people to look over other patches that have been
submitted. Something along the lines of ... if everyone
who submits a patch will just go through and check over
10 other patches we will have this backup sorted quickly.

So, if there are patches in the tracker that are in the
same general area as yours, or in another area about which
you have some knowledge, you chould check them out, and
comment on them and help out the process.


From onurb at xiludom.gro  Thu Feb 10 04:38:56 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Thu, 10 Feb 2005 10:38:56 +0100
Subject: Some questions...
In-Reply-To: <mailman.2277.1107987487.22381.python-list@python.org>
References: <mailman.2277.1107987487.22381.python-list@python.org>
Message-ID: <420b2bb3$0$487$626a14ce@news.free.fr>

Mario Lacunza wrote:
> Hello,
> 
> Im new in Python, please  I need some information:
> 
> - Somebody know if: is possible use Python within Net Framework in
> windows environment??

http://www.ironpython.com/
http://www.zope.org/Members/Brian/PythonNet/

> - Where found info about reports in Python? exist some program like
> Crystal Reports??
ReportLab is probably the place to go
http://www.reportlab.org/

> -  Database access: Firebird , I dont found correct information about
> this tools and his conection/working with Python.
http://kinterbasdb.sourceforge.net/


> Thanks!!!
> 
HTH

-- 
bruno desthuilliers
ruby -e "print 'onurb at xiludom.gro'.split('@').collect{|p| 
p.split('.').collect{|w| w.reverse}.join('.')}.join('@')"
--


From devries at idolstarastronomer.com  Thu Feb 24 14:51:07 2005
From: devries at idolstarastronomer.com (Christopher De Vries)
Date: Thu, 24 Feb 2005 14:51:07 -0500
Subject: Canonical way of dealing with null-separated lines?
In-Reply-To: <lczmxtpyp3.fsf@gaffa.mit.edu>
References: <lcll9efw8l.fsf@gaffa.mit.edu>
	<mailman.3006.1109264015.22381.python-list@python.org>
	<lczmxtpyp3.fsf@gaffa.mit.edu>
Message-ID: <20050224195107.GC13386@miyu.cjas.org>

On Thu, Feb 24, 2005 at 02:03:52PM -0500, Douglas Alan wrote:
> Thanks for the generator.  It returns an extra blank line at the end
> when used with "find -print0", which is probably not ideal, and is
> also not how the normal file line iterator behaves.  But don't worry
> -- I can fix it.

Sorry... I forgot to try it with a null terminated string. I guess it further
illustrates the power of writing good test cases. Something like this would
help: 

    # yield anything left over
    if retain[0]:
        yield retain[0]

The other modification would be an option to ignore multiple nulls in a row,
rather than returning empty strings, which could be done in a similar way.

Chris


From steven.bethard at gmail.com  Wed Feb  9 18:26:26 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 09 Feb 2005 16:26:26 -0700
Subject: empty classes as c structs?
In-Reply-To: <1grnyld.1t8l5kw1nr5aqsN%aleaxit@yahoo.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>
	<mailman.1973.1107618702.22381.python-list@python.org>
	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>
	<mailman.2006.1107658273.22381.python-list@python.org>
	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>
	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>
	<mailman.2049.1107750700.22381.python-list@python.org>
	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com>
	<4207606E.4040806@iinet.net.au> <cu8amb$ufa$1@sea.gmane.org>
	<mailman.2158.1107859833.22381.python-list@python.org>
	<1grnyld.1t8l5kw1nr5aqsN%aleaxit@yahoo.com>
Message-ID: <E7CdnTFdo5S8AZffRVn-og@comcast.com>

Alex Martelli wrote:
> Nick Coghlan <ncoghlan at iinet.net.au> wrote:
> 
> 
>>>We could use __add__, instead for combining namespaces
>>
>>Update already let's us combine namespaces. To create a new object that merges
>>two namespaces do:
>>   namespace.update(namespace(ns_1), ns_2)
> 
> 
> One thing I'd like to see in namespaces is _chaining_ -- keeping each
> namespace separate but having lookups proceed along the chain.  (The
> best semantics for _bindings_ as opposed to lookups isn't clear though).

I'm not sure I understand exactly what you're looking for here...  Is 
this what you want?

py> b = Bunch.chain(Bunch(x=1), Bunch(x=2, y=2), Bunch(y=3))
py> b.x
1
py> del b.x
py> b.x
2
py> del b.x
py> b.x
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
   File "D:\Steve\My Programming\python\bunch.py", line 104, in 
__getattribute__
     raise AttributeError(name)
AttributeError: x
py> b.y
2
py> del b.y
py> b.y
3
py> del b.y
py> b.y
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
   File "D:\Steve\My Programming\python\bunch.py", line 104, in 
__getattribute__
     raise AttributeError(name)
AttributeError: y

Or should 'del b.x' remove all 'x' attributes from all the bunches in 
the chain?


The code I used for this looks like:

class Bunch(object):
     ...
     class chain(object):
         def __init__(self, *bunches):
             self._bunches = bunches
         def __getattribute__(self, name):
             getattribute = super(Bunch.chain, self).__getattribute__
             try:
                 return getattribute(name)
             except AttributeError:
                 for bunch in getattribute('_bunches'):
                     try:
                         return getattr(bunch, name)
                     except AttributeError:
                         pass
                 raise AttributeError(name)
         def __delattr__(self, name):
             for bunch in self._bunches:
                 try:
                     return delattr(bunch, name)
                 except AttributeError:
                     pass
             raise AttributeError(name)

I didn't know what to do for __setattr__...  Was that what you meant by 
"The best semantics for _bindings_ as opposed to lookups isn't clear 
though"?

Steve


From steven.bethard at gmail.com  Tue Feb  1 01:53:54 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 31 Jan 2005 23:53:54 -0700
Subject: a sequence question
In-Reply-To: <mailman.1553.1106960946.22381.python-list@python.org>
References: <lzrKd.138680$K7.56500@news-server.bigpond.net.au>	<Xns95EC9DCBC6294duncanrcpcouk@127.0.0.1>
	<mailman.1553.1106960946.22381.python-list@python.org>
Message-ID: <MpmdnV3CyoAeumLcRVn-2g@comcast.com>

Nick Coghlan wrote:
> I'd definitely recommend hiding this trick inside a function. Perhaps 
> something like (using Michael's function name):
> 
> from itertools import izip, repeat, chain
> 
> def partition(seq, part_len):
>   return izip(*((iter(seq),) * part_len))
> 
> def padded_partition(seq, part_len, pad_val=None):
>   itr = iter(seq)
>   if (len(seq) % part_len != 0):
>     padding = repeat(pad_val, part_len)
>     itr = chain(itr, padding)
>   return izip(*((itr,) * part_len))

I think you can write that second one so that it works for iterables 
without a __len__:

py> def padded_partition(iterable, part_len, pad_val=None):
...     itr = itertools.chain(
...         iter(iterable), itertools.repeat(pad_val, part_len - 1))
...     return itertools.izip(*[itr]*part_len)
...
py> list(padded_partition(itertools.islice(itertools.count(), 10), 2))
[(0, 1), (2, 3), (4, 5), (6, 7), (8, 9)]
py> list(padded_partition(itertools.islice(itertools.count(), 10), 3))
[(0, 1, 2), (3, 4, 5), (6, 7, 8), (9, None, None)]

I just unconditionally pad the iterable with 1 less than the partition 
size...  I think that works right, but I haven't tested it any more than 
what's shown.

Steve


From jdhunter at ace.bsd.uchicago.edu  Wed Feb 23 11:32:13 2005
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Wed, 23 Feb 2005 10:32:13 -0600
Subject: MatPlotLib.MatLab troubles (how to install/run
 matplotlib.PyLab?)
In-Reply-To: <1109114342.782633.31240@o13g2000cwo.googlegroups.com> ("Dr.
	Colombes"'s message of "22 Feb 2005 15:19:02 -0800")
References: <1109033814.888677.286240@c13g2000cwb.googlegroups.com>
	<mailman.2909.1109038689.22381.python-list@python.org>
	<1109114342.782633.31240@o13g2000cwo.googlegroups.com>
Message-ID: <m3hdk3nsoi.fsf@peds-pc311.bsd.uchicago.edu>

>>>>> "Colombes" == Colombes  <DrColombes at yahoo.com> writes:

    Colombes>    Now I only need to figure out how to install the
    Colombes> correct "Numeric" module(s).  I'm making progress,
    Colombes> almost have my home laptop fully capable with the
    Colombes> MatLab-like (PyLab) graphs, plots.

You can get either Numeric or numarray from
http://sourceforge.net/projects/numpy.  matplotlib works transparently
with either (and provides a unified interface to both), but if you
choose numarray you need to change the "numerix" variable to numarray
in your matplotlib configuration file, which is described at
http://matplotlib.sf.net/.matplotlibrc

Good luck!
JDH



From aleaxit at yahoo.com  Sun Feb  6 17:56:07 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 6 Feb 2005 23:56:07 +0100
Subject: Confused with methods
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<1grknb0.ygwohl17y6j5yN%aleaxit@yahoo.com>
	<mailman.2028.1107713638.22381.python-list@python.org>
Message-ID: <1grl5cn.1k7qrmm1ondzhpN%aleaxit@yahoo.com>

jfj <jfj at freemail.gr> wrote:

> >>Isn't that inconsistent?
> > 
> > That Python has many callable types, not all of which are descriptors?
> > I don't see any inconsistency there.  Sure, a more generalized currying
> > (argument-prebinding) capability would be more powerful, but not more
> > consistent (there's a PEP about that, I believe).
> 
> Thanks for the explanation.
> 
> The inconsistency I see is that if I wanted this kind of behavior
> I would've used the staticmethod() builtin (which in a few words
> alters __get__ to return the function unmodified).

The staticmethod builtin would NOT have given you the behavior: "bind
the first argument".  I do not know what you mean by "this kind of
behavior", but making a boundmethod most assuredly DOES give you
extremely different behavior from wrapping a function in staticmethod.

I still wouldn't see any "inconsistency" even if two different ways of
proceeding gave the same result in a certain case.  That would be like
saying that having x-(-y) give the same result as x+y (when x and y are
numbers) is ``inconsistent''... the word ``inconsistent'' just doesn't
MEAN that!

"Inconsistent" means sort of the reverse: one way of proceeding giving
different results.  But the fact that the same operation on objects of
different types may well give different results isn't _inconsistent_ --
it's the sole purpose of HAVING different types in the first place...!


Alex


From greg.lindstrom at novasyshealth.com  Fri Feb 11 11:45:45 2005
From: greg.lindstrom at novasyshealth.com (Greg Lindstrom)
Date: Fri, 11 Feb 2005 10:45:45 -0600
Subject: Postgres and SSL
Message-ID: <420CE139.5060302@novasyshealth.com>

I'm on a Linux box running python 2.3 and would like to connect to a 
postgres database via SSL, but have not been able to find a module to do 
this (or haven't figured out the syntax).  Can anyone help me out?

Thanks,
--greg

-- 
Greg Lindstrom               501 975.4859
Computer Programmer          greg.lindstrom at novasyshealth.com
NovaSys Health
Little Rock, Arkansas

"We are the music makers, and we are the dreamers of dreams."  W.W.

Confidentiality Notice
----------------------
This email and any attachments to it are privileged and confidential and are intended solely for use of the individual or entity to which they are addressed. If the reader of this message is not the intended recipient, any use, distribution, or copying of this communication, or disclosure of all or any part of its content to any other person, is strictly prohibited. If you have received this communication in error, please notify the sender by replying to this message and destroy this message and delete any copies held in your electronic files. Thank you.



From jeff at wave.no  Mon Feb 28 12:39:19 2005
From: jeff at wave.no (Jeffrey A. Zelt)
Date: Mon, 28 Feb 2005 18:39:19 +0100
Subject: Newbie question: Uninstalling Python Package Manager packages
Message-ID: <324b4fb91c2ed786b426279002b13157@wave.no>

I am new to python, but am very enthusiastic about the language and 
hope to start using it for serious work soon (after I am more 
comfortable with all the details).

I have installed a package via the Python Package Manager program on 
Mac OS X 10.3 (http://www.python.org/packman/).

My question is:


How do I UNinstall the package?  Is there somewhere I can find what has 
been installed and where it was installed so I can delete the file(s) 
manually?  Or is there a simpler procedure to uninstall, similar to how 
the package manager performs the install?

Nothing horrible has occurred yet, but I feel uncomfortable installing 
something when I don't know where the files will end up, nor how to 
uninstall it.

Any help would be appreciated.  Thanks in advance.

Jeff

=====================
  Jeffrey A. Zelt
  jeff at wave.no
  http://www.jeff.wave.no/
=====================



From aleaxit at yahoo.com  Sun Feb  6 04:17:31 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 6 Feb 2005 10:17:31 +0100
Subject: Multiple constructors
References: <6SjNd.38337$K7.21639@fe2.news.blueyonder.co.uk>
Message-ID: <1grk3du.3zpb0h62fjd1N%aleaxit@yahoo.com>

Philip Smith <as006d4848 at blueyonder.co.uk> wrote:

> Call this a C++ programmers hang-up if you like.
> 
> I don't seem to be able to define multiple versions of __init__ in my matrix

Indeed, you can never define ``multiple versions'' of the same name in
the same scope: one scope + one name -> one object.

That's what a name (in a given scope, which I won't keep repeating)
MEANS -- in Python as well as in common sense.

> class (ie to initialise either from a list of values or from 2 dimensions
> (rows/columns)).
> 
> Even if Python couldn't resolve the __init__ to use on the basis of argument
> types surely it could do so on the basis of argument numbers???

It could, if it didn't think a name is a name is a name.  By sticking to
resolution JUST BY NAME, instead of by name plus who knows what else,
however, Python gains a lot of conceptual simplicity without any loss of
functionality.  Therefore, it's a great design choice.


> At any rate - any suggestions how I code this????

My preferred suggestion is to accept that one name === one object: you
want two different objects (constructors), give them two different
names.  One, if you wish, can be __init__ -- the other could be a
staticmethod or even better a classmethod.  Or, have two named methods.

class Matrix(object):
    def __init__(self, values):
        " init self from values "
    @classmethod
    def withDimensions(cls, x, y):
        return cls([0.0]*x for i in xrange(y))
    @classmethod
    def fromValues(cls, values):
        return cls(values)

Now, Matrix.withDimensions(3, 4) and Matrix.fromValues([[1,2],[3,4]])
are both available and maximally clear, and the latter you can also call
as Matrix([[1,2],[3,4]]) if you wish.  The advantage of using
classmethod is that if you later go and subclass

class SpecialMatrix(Matrix):
   ...

you can call the classmethods on this subclass and get an instance of
the subclass, which can sometimes be handy -- better than using
staticmethods (or factory functions ``outside the class'') and
``hardwiring'' what class they instantiate.


I don't particularly like the concept of a function or method which does
drastically different things -- I'd rather see one function have ONE
function (taking the second repetition as meaning ``role'', ``task'').
This goes for __init__, too.  Still, if you're keen on the idea, you can
of course have your __init__ take optional arguments, check their
presence and/or type, and whatever other devilry; I just think it's not
a very good design, but it does end up with just the same effect as C++
overloaded constructors, which you seem to like.  If you want to do this
all the time, you could even build appropriate infrastructure for this
task -- a little custom descriptor and metaclass, and/or decorators.
Such infrastructure building is in fact fun and instructive -- as long
as you don't fall into the trap of *using* such complications in
production code, where Python's simplicity rules;-).


Alex
 


From cappy2112 at gmail.com  Wed Feb  2 20:45:04 2005
From: cappy2112 at gmail.com (Cappy2112)
Date: 2 Feb 2005 17:45:04 -0800
Subject: CONTEST - What is the (best) solution?
In-Reply-To: <1107357151.234804.187440@g14g2000cwa.googlegroups.com>
References: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
	<1107350983.411793.146600@g14g2000cwa.googlegroups.com>
	<1107357151.234804.187440@g14g2000cwa.googlegroups.com>
Message-ID: <1107395104.361373.206140@o13g2000cwo.googlegroups.com>



> dictionaries can NOT contain dictionaries.

Who told you this?
In my python, they can.

d1={1:"one"}
>>> d2={2:"two"}
>>> d1
{1: 'one'}
>>> d2
{2: 'two'}
>>> d3={3:d2}
>>> d3
{3: {2: 'two'}}

python at hope.cz wrote:
> Fuzzyman wrote:
> > Can your dictionaries contain dictionaries ?
> Hi Fuzzy,
> dictionaries can NOT contain dictionaries.
> I re-checked and I would need only the last dictionary.
> Any idea how I could do that?
> Thanks
> Lad.



From cyril.bazin at gmail.com  Tue Feb 22 08:50:22 2005
From: cyril.bazin at gmail.com (Cyril BAZIN)
Date: Tue, 22 Feb 2005 14:50:22 +0100
Subject: executea string
In-Reply-To: <cvf06k$5ls$1@azure.qinip.net>
References: <mailman.2923.1109063557.22381.python-list@python.org>
	<cvf06k$5ls$1@azure.qinip.net>
Message-ID: <a10b8d6205022205503a42407@mail.gmail.com>

> >  c=2
> >  e=3
> >  s="12"
> >  code.append('funtion ("c, e,s")')
> >  print "\n".join(code) + '\n'
> >

Hello, 

You could try this: 

-----------------------
from string import Template
code = ""
c=2
e=3
s="12"
code.append(Template('function ("$c, $e, $s")').substitute(vars()))
print "\n".join(code) + '\n'
------------------------

For more informations about templates, see:
http://docs.python.org/lib/node105.html
Note that is new in version 2.4...


Cyril


From michele.simionato at gmail.com  Mon Feb 21 00:56:20 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 20 Feb 2005 21:56:20 -0800
Subject: recommended way of generating HTML from Python
In-Reply-To: <4218f506$0$1220$8fcfb975@news.wanadoo.fr>
References: <1108889625.068929.88890@z14g2000cwz.googlegroups.com>
	<4218f506$0$1220$8fcfb975@news.wanadoo.fr>
Message-ID: <1108965380.059565.200110@g14g2000cwa.googlegroups.com>

The problem is a problem of standardization, indeed. There plenty of
recipes to
do the same job, I just would like to use a blessed one (I am teaching
a Python
course and I do not know what to recommend to my students).

FWIW, here is a my version of the recipe (stripped down to the bare
essentials)

.def makeattr(dict_or_list_of_pairs):
.    dic = dict(dict_or_list_of_pairs)
.    return " ".join("%s=%r" % (k, dic[k]) for k in dic)

.class HTMLTag(object):
.    def __getattr__(self, name):
.        def tag(value, **attr):
.            """value can be a string or a sequence of strings."""
.            if hasattr(value, "__iter__"): # is iterable
.                value = " ".join(value)
.            return "<%s %s>%s</%s>\n" % (name, makeattr(attr), value,
name)
.        return tag

# example:
.html = HTMLTag()

.tableheader = ["field1", "field2"]
.tablebody = [["a1", "a2"],
.         ["b1", "b2"]]

.html_header = [html.tr(html.th(el) for el in tableheader)]
.html_table = [html.tr(html.td(el) for el in row) for row in tablebody]
.print html.table(html_header + html_table)
    
          Michele Simionato



From jfj at freemail.gr  Mon Feb  7 16:15:15 2005
From: jfj at freemail.gr (jfj)
Date: Mon, 07 Feb 2005 13:15:15 -0800
Subject: Confused with methods
In-Reply-To: <1grl578.1rmaukw1yyw0g4N%aleaxit@yahoo.com>
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<TL-dneoHycPA35vfRVn-qQ@rogers.com>
	<mailman.2027.1107713399.22381.python-list@python.org>
	<1grl578.1rmaukw1yyw0g4N%aleaxit@yahoo.com>
Message-ID: <4207DA63.8000604@freemail.gr>

Alex Martelli wrote:
> jfj <jfj at freemail.gr> wrote:
> 
>>Then, without looking at the previous code, one can say that "x" is a
>>function which takes one argument.
> 
> 
> One can say whatever one wishes, but saying it does not make it true.
> 
> One can say that x is a green frog, but that's false: x is a
> boundmethod.
> 
> One can say that x is a function, but that's false: x is a boundmethod.
> 
> One can say that x is a spade, but that's false: x is a boundmethod.
> 

I understand that a function and a boundmethod are *different* things.
For one a *boundmethod* has the attributes im_self, im_class, which
a function does not have (a green frog neither). Thus they are not
the same thing.

HOWEVER, what I ask is WHY don't we set the tp_descr_get of
the boundmethod object to be the same as the func_descr_get???
Or WHY do they *have* to differ in this specific part?

I quickly looked at the source of python and it seems that a
one-liner would be enough to enable this. So it's not that it
would be hard to implement it, or inefficient.

A bound method would *still* be a boundmethod.
We could additionally have:

 >>>type(x)
  <boundmethod of <boundmethod of <boundmethod of....<__main__.A 
instance at 0x>>>

If there a good reason that the __get__ of a boundmethod does not
create a new boundmethod wrapper over the first boundmethod?


G.


From aurora00 at gmail.com  Fri Feb 18 13:53:36 2005
From: aurora00 at gmail.com (aurora)
Date: Fri, 18 Feb 2005 10:53:36 -0800
Subject: unicode encoding usablilty problem
References: <opsmekm2ei6yt6e7@news.cisco.com>
	<mailman.2811.1108751132.22381.python-list@python.org>
Message-ID: <opsmepfmcx6yt6e7@news.cisco.com>

On Fri, 18 Feb 2005 19:24:10 +0100, Fredrik Lundh <fredrik at pythonware.com>  
wrote:

> that's how you should do things in Python too, of course.  a unicode  
> string
> uses unicode internally. decode on the way in, encode on the way out, and
> things just work.
>
> the fact that you can mess things up by mixing unicode strings with  
> binary
> strings doesn't mean that you have to mix unicode strings with binary  
> strings
> in your program.

I don't want to mix them. But how could I find them? How do I know this  
statement can be potential problem

   if a==b:

where a and b can be instantiated individually far away from this line of  
code that put them together?

In Java they are distinct data type and the compiler would catch all  
incorrect usage. In Python, the interpreter seems to 'help' us to promote  
binary string to unicode. Things works fine, unit tests pass, all until  
the first non-ASCII characters come in and then the program breaks.

Is there a scheme for Python developer to use so that they are safe from  
incorrect mixing?


From tzot at sil-tec.gr  Sat Feb  5 04:06:58 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Sat, 05 Feb 2005 11:06:58 +0200
Subject: returning True, False or None
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
	<PTOMd.103076$Jk5.19984@lakeread01>
Message-ID: <8u6801pkc3m856jgh88cjb1f3dglqiqhbi@4ax.com>

On Fri, 04 Feb 2005 13:04:16 -0500, rumours say that Steve Holden
<steve at holdenweb.com> might have written:

[STeVe]
>> For a given list:
>> * If all values are None, the function should return None.
>> * If at least one value is True, the function should return True.
>> * Otherwise, the function should return False.

[Stevbe]
>If you wanted to get clever you could write something like
>
>for i in True, False:
>   if i in lst:
>     return i
>return False

[!Steve]

You mistyped None as False in the last line.  Your typos are getting worse every
day :)
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From fuzzyman at gmail.com  Tue Feb 15 10:00:51 2005
From: fuzzyman at gmail.com (fuzzyman at gmail.com)
Date: 15 Feb 2005 07:00:51 -0800
Subject: [ANN] ConfigObj update - v3.2.5
Message-ID: <mailman.2632.1108484369.22381.python-announce-list@python.org>

ConfigObj has had another update - now version 3.2.5

This update includes 3 bugfixes and several new features. Because of
the bugfixes it's reccomended for all users. New features include -
lines can now be broken over two or more lines, initial and final
comments in a config file are preserved (or can be set) when using the
write method, we can now read/write config files directly to and from a
StringIO object, and empty values are now valid (like 'value=' as per
ini files).

Homepage : http://www.voidspace.org.uk/python/configobj.html
For downloading, see the download section of the homepage.


What is ConfigObj
==================

A python module (class) for ultra simple reading and writing of simple
config files, including config files with sections. Designed to allow
the greatest flexibility in the config files it will read (and your
users will create).

Many flexible features - but you don't need to use them !


What's New ?
=============

The last announced release was 3.2.3, changes since then include :

   2005/02/15        Version 3.2.5
   Changes so that ConfigObj can work with StringIO instances, by Wayne
Wiitanen
       (for a project that receives a configuration file over a socket
as a string.
       It is used as the source text for a StringIO object)
   Lines can be extended across more than one line, with the '\'
character
       (must be final character on line - it escapes the newline)
   Empty values can be written 'value=' (like the ini file - but read
only currently)
   Errors whilst parsing now report the line they occurred in
   Duplicate keys and sections are now reported as errors (bug fix)
   isflatfile can now handle '[' inside '\*.. *\' comments (bug fix)
   Fixed bug in handling of final line of '\*.. *\' comments
   If the first and last non empty lines of a config file are comments
they will be preserved as config.initial_comment and self.final_comment
      These are written out when the write method is called (but not
the writein method)
      New list attributes self.initial_comment and self.final_comment
   self.sectionfile is always set to the opposite of self.flatfile
         2005/01/07        Version 3.2.4
   Use absolute paths for stored filename. Avoids problems when cwd is
changed.


There have also been a few other improvements to voidspace modules.
Hopefully I'll soon be announcing upgrades to approx,
approxClientproxy, and downman.py.

There is now more detailed information on customizing Movable Python
distributions. See http://www.voidspace.org.uk/python/movpy

Regards,


Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From fredrik at pythonware.com  Tue Feb  8 03:50:11 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 09:50:11 +0100
Subject: Subclassing cElementTree.Element
References: <4207f801$1_2@newspeer2.tds.net>
Message-ID: <cu9ud0$3i0$1@sea.gmane.org>

Kent Johnson wrote:

> Is it possible to subclass cElementTree.Element? I tried
>  >>> import cElementTree as et
>  >>> class Elt(et.Element):
>  ...   pass
>  ...
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> TypeError: Error when calling the metaclass bases
>     cannot create 'builtin_function_or_method' instances

Nope.

This is by design; Elements are intended to be contained, not subclassed. (you
cannot subclass ElementTree Elements either; Element is a factory function, not
a class).

To solve the navigation issue, you could either use a dictionary that keeps track
of child-parent relations, or use a proxy wrapper.  Or see if you can structure your
code so you always work from parents (that's usually easier than you may think).

</F> 





From listserver at tdw.net  Thu Feb  3 12:22:35 2005
From: listserver at tdw.net (Tim Williams)
Date: Thu, 3 Feb 2005 17:22:35 -0000
Subject: Sendmail with many attach and recipients
Message-ID: <006c01c50a15$02eaa410$5aeda8c0@twilliams>

<fernandestb at gmail.com> wrote in message
news:81b88e49.0502030850.490952c9 at posting.google.com...
Here, my code of sendmail
If Somebody had a doubt please contact me?
fernandestb at gmail.com

[snip]

If you have multiple recipients,  you need to modify

server.sendmail(msg['From'],toaddrs,msg.as_string())

to

failed = server.sendmail(msg['From'],toaddrs,msg.as_string())
# exception is only raised if ALL recips fail
# failed is a list of failed recips, or empty

You could also expand your smtplib exception handling
[not tested]

    try:
        server = smtplib.SMTP(servidor_smtp)
        ## Faz o envio do email.
        try:
            failed = server.sendmail(msg['From'],toaddrs,msg.as_string())
            if failed:
                do something
            ## Fecha a conex?o com o servidor
        except smtplib.SMTPRecipientsRefused, x :  #all recips failed before
data sent = MSG failed
            do something
        except smtplip.SMTPDataError, x: # an error at the end of the
message body receipt =  MSG Failed
            do something
        except smtplib.SMTPSenderRefused, x : # the sender was refused = MSG
failed
            do something
        except: #can't connect
            do something
        finally
            server.quit()
    except  Exception, e:
        arq=open(dir_log,'a')
        print >> arq, "Falha no envio da mensagem de email, n?o foi

-- 

=================================
Tim Williams



From vetter at lincom-asg.com  Wed Feb  9 10:13:28 2005
From: vetter at lincom-asg.com (Keith)
Date: 9 Feb 2005 07:13:28 -0800
Subject: PHP Embedded In Python
In-Reply-To: <1107899088.967746.48530@g14g2000cwa.googlegroups.com>
References: <1107814685.908990.58410@z14g2000cwz.googlegroups.com>
	<1107818262.741563.266050@c13g2000cwb.googlegroups.com>
	<1107872763.019447.281670@c13g2000cwb.googlegroups.com>
	<1107899088.967746.48530@g14g2000cwa.googlegroups.com>
Message-ID: <1107962008.512216.314990@f14g2000cwb.googlegroups.com>

> Well it depends on how php is installed. Is it a linux system? Do you
> know how to run a php script from the command line?

I'm running on Fedora Core 3.

To run php command line I just ran:
% php <php.script>
It spit something back at me.

Maybe I should lay out what I am doing a little more.

I have a website.

At the top of each html page in the website it looks like:
------------------
<?php
   include "header.html"
?>

.... HTML CODE ....

<?php
  include "footer.html"
?>
-------------------



In "header.html" it looks like:
-------------------
<?php
  include "access.php";    // A login cookie type thingy
?>
... HTML CODE FOR LOGO, COMMON MENU ETC...
-------------------


As the story goes... I decided to put a Wiki on the website.  I got
MoinMoin which is a Python based Wiki.  It's really cool.  MoinMoin
uses a python cgi to generate html pages.  MoinMoin configuration
allows you to put an optional header and footer for each displayed
page.  Straight html works fine; however, my "header.html" and
"footer.html" do not with the embedded php.  The resulting python
generated pages have the literal string <?php include "access.php"; ?>.

Maybe the answer is still to use the os call.

Thanks for your help.  My little brush with the Python community gives
me the feeling that you guys are friendly.  It's nice.



From irmen.NOSPAM at xs4all.nl  Tue Feb  8 15:05:48 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Tue, 08 Feb 2005 21:05:48 +0100
Subject: Python versus Perl ?
In-Reply-To: <cub3av$dso$1@nntp.msstate.edu>
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com><hkhc01dnpmmhn980quijqil40653qipdki@4ax.com>	<cuavn1$bag$1@nntp.msstate.edu>
	<mailman.2207.1107888646.22381.python-list@python.org>
	<cub3av$dso$1@nntp.msstate.edu>
Message-ID: <42091b9c$0$28977$e4fe514c@news.xs4all.nl>

m wrote:
> Fredrik Lundh wrote:
> 
>> if you use Python mostly to write empty loops, your programming license
>> should be revoked.  the benchmark author seems to have realized that, as
>> can be seen from the "it's dead" paragraph at the top of the page, which
>> makes me wonder why you posted this link...
>>
>> </F> 
> 
> 
> i was trying to decide whether i needed perl or python for some work 
> that i had to get done and was seeing which was faster. and came across 
> this link which i tht was pertinent. is python as fast as perl for the 
> nonempty loops that the author wrote?

Why do you care?
Have you read http://www.python.org/moin/PythonSpeed ?

--Irmen


From sjmachin at lexicon.net  Sun Feb 20 05:29:33 2005
From: sjmachin at lexicon.net (John Machin)
Date: 20 Feb 2005 02:29:33 -0800
Subject: exercise: partition a list by equivalence
In-Reply-To: <1108890925.941814.45860@g14g2000cwa.googlegroups.com>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<1108814276.680736.264380@l41g2000cwc.googlegroups.com>
	<37pb5jF5fnfivU1@individual.net>
	<1108890925.941814.45860@g14g2000cwa.googlegroups.com>
Message-ID: <1108895373.013257.192310@l41g2000cwc.googlegroups.com>


Xah Lee wrote:
> when i try to run the following program, Python complains about some
> global name frozenset is not defined. Is set some new facility in
> Python 2.4?

http://www.python.org/doc/2.3/whatsnew/
http://www.python.org/doc/2.4/whatsnew/whatsnew24.html

You must be running 2.3. If you persist in running 2.3, put the
following at the top of the file:

import sys
PY_VERSION = sys.version_info[:2]
if PY_VERSION == (2,3):
    from sets import Set as set
    from sets import ImmutableSet as frozenset

That will get Reinhold's gadget working under 2.3. The bearophile's
function uses collections.deque which is built-in to 2.4.

> it would be nice if the two working programs do not use some package.
> This problem shouldn't need to.

Look at the newsgroup again. By my count there are apparently-working
versions from SIX people: Reinhold, bear.+, Brian Beck, David Eppstein,
yourself, and me. Only David's uses stuff that's not in the Python 2.4
off-the-shelf distribution.



From tzot at sil-tec.gr  Tue Feb  8 13:40:47 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Tue, 08 Feb 2005 20:40:47 +0200
Subject: Efficient checksum calculating on lagre files
References: <5o2nd2-5hl.ln1@pluto.i.infosense.no>
	<4208E537.4070901@chamonix.reportlab.co.uk>
	<mailman.2199.1107881519.22381.python-list@python.org>
Message-ID: <9r1i01d9m28skagr93mi3ttnpgutabduh5@4ax.com>

On Tue, 8 Feb 2005 17:26:07 +0100, rumours say that "Fredrik Lundh"
<fredrik at pythonware.com> might have written:

>on my machine, Python's md5+mmap is a little bit faster than
>subprocess+md5sum:
>
>    import os, md5, mmap
>
>    file = open(fn, "r+")
[snip]

My first reaction was that "r+" should be "r+b"... but then one presumes that an
mmap'ed file does not care about stdio text-binary conventions (on platforms
that matters).
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From steve at holdenweb.com  Thu Feb  3 09:55:34 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 03 Feb 2005 09:55:34 -0500
Subject: Hey, get this!
In-Reply-To: <just-9045B1.15374303022005@news1.news.xs4all.nl>
References: <mailman.1509.1106923923.22381.python-list@python.org>
	<ctdlpq$ukf$00$1@news.t-online.com>
	<k%WKd.98003$Jk5.87621@lakeread01> <4200E5CB.6020508@holdenweb.com>
	<s9z4qgvrpaj.fsf@salmakis.intevation.de>
	<s9zr7jx213w.fsf@salmakis.intevation.de>
	<just-9045B1.15374303022005@news1.news.xs4all.nl>
Message-ID: <42023B66.9020309@holdenweb.com>

Just wrote:
> In article <s9zr7jx213w.fsf at salmakis.intevation.de>,
>  Bernhard Herzog <bh at intevation.de> wrote:
> 
> 
>>Bernhard Herzog <bh at intevation.de> writes:
>>
>>
>>>Steve Holden <steve at holdenweb.com> writes:
>>>
>>>>         if package:
>>>>             module.__path__ = sys.path
>>>
>>>You usually should initialize a package's __path__ to an empty list.
>>
>>Actually, normally it's a list that contains the name of the package
>>directory as its only item.  I'm not sure what you should do when you do
>>not import from a file system.
> 
> 
> If it's a path importer, it could be a cookie, specific to the importer. 
> I think in Steve's case initializing __path__ to ["*db*"] should work.
> 
> Just

And that's exactly the conclusion I came to when import of the package's 
submodules didn't work as anticipated.

Coming to the question of writing a customer importer from the 
documentation I discovered there is a huge amount of layered cruft in 
the import scheme going all the way back to the days of the "ni" module. 
It took me two aborted attempts just to realize I should be using PEP 
302 and not ihooks or some wrapper around __import__().

While this may be interesting history it's very confusing, and I'm 
encouraging Alex Martelli to describe the current PEP-302-based scheme a 
little more fully in his forthcoming revision to the Nutshell. The PEP 
is just a little terse in places, I feel.

I'm also wondering if the inspect module shouldn't have a facility to 
hook into custom importers, since its code is pretty much filestore 
based at present. This should probably be via an *optional* API to avoid 
breakage in existing custom importers.

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From bvande at po-box.mcgill.ca  Sat Feb  5 00:00:29 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Sat, 05 Feb 2005 00:00:29 -0500
Subject: returning True, False or None
In-Reply-To: <s-qdnUN84dx82pnfRVn-hQ@rcn.net>
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
	<6Z6dnVfTmdUDopnfRVn-1A@rcn.net> <36iv03F4urakqU1@individual.net>
	<s-qdnUN84dx82pnfRVn-hQ@rcn.net>
Message-ID: <420452ED.3090106@po-box.mcgill.ca>

Fahri Basegmez said unto the world upon 2005-02-04 23:14:
> "Mick Krippendorf" <mad.mick at gmx.de> wrote in message 
> news:36iv03F4urakqU1 at individual.net...
> 
>>Fahri Basegmez wrote:
>>
>>>reduce(lambda x, y: x or y, lst)
>>
>>This doesn't solve the OPs problem since
>>
>>
>>>>>reduce(lambda x, y: x or y, [False, None])
>>
>>returns None instead of False.
>>
>>Mick.
>>
> 
> 
> You are right.
> I tested None or False and it worked. I assumed order did not matter for or 
> operator.
> 
> None or False returns False
> False or None returns None
> 
> You know what they say about assumptions. Live and learn.
> 
> Fahri

Hi Fahri,

I don't have a reference at hand, but you might want to check the 
docs' index or do a google for short circuit python or something similar.

or works by evaluating the first value and returning it if it 
evaluates to True. Otherwise it returns the second.
 >>> 0 or 42
42
 >>>

Likewsie, and returns the first if it evaluates to False, otherwise it 
returns the second.
 >>> [] and 42
[]
 >>>

The idea is that the evaluation breaks out as soon as it has seen 
enough to determine the result. Hence, short circuit. And, instead of 
returning a Boolean, it returns the actual object flanking the 
operator. Hence, the behaviour observed.

HTH,

Brian vdB



From doodle4 at gmail.com  Wed Feb  9 18:03:02 2005
From: doodle4 at gmail.com (doodle4 at gmail.com)
Date: 9 Feb 2005 15:03:02 -0800
Subject: newbie question
Message-ID: <1107990182.516041.120410@o13g2000cwo.googlegroups.com>

Hello All,
What is the python equivalent of the following statement?

while (n--)

Thank you.
-d4



From apardon at forel.vub.ac.be  Thu Feb 10 06:09:50 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 10 Feb 2005 11:09:50 GMT
Subject: variable declaration
References: <4202A022.3050209@netscape.net>
	<MSGID_2=3A5025=2F3.131_4204b0a9@fidonet.org>
	<mailman.1978.1107622451.22381.python-list@python.org>
	<slrnd0epjg.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2069.1107783321.22381.python-list@python.org>
	<slrnd0esqn.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2152.1107854937.22381.python-list@python.org>
	<slrnd0h3e9.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2156.1107859510.22381.python-list@python.org>
	<slrnd0h9r8.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2239.1107951749.22381.python-list@python.org>
Message-ID: <slrnd0mg7t.26q.apardon@rcpc42.vub.ac.be>

Op 2005-02-09, Nick Coghlan schreef <ncoghlan at iinet.net.au>:
> Antoon Pardon wrote:
>> Op 2005-02-08, Nick Coghlan schreef <ncoghlan at iinet.net.au>:
>>>The CPython *_FAST opcodes relate to functions' local variables. Behind the 
>>>scenes they are implemented as integer indexing operations into a pre-sized C 
>>>array. Operations don't come much faster than that :)
>> 
>> 
>> I don't follow. AFAIR my remark here above was about the STORE opcode.
>> But you seem to react to it as if I am talking about STORE_FAST.
>
> I've been talking about rebinding function local variables all along - which 
> means STORE_FAST. I may not have made that explicit, though.
>
> However, even in the general case, "check it already exists and overwrite it if 
> it does" is going to be slower than "just store it".
>
> The reason is that, if checking for the existence of the name first somehow 
> provides a speed advantage (I still can't see how it could), then the latter 
> case of unconditional storage can check for the names existence *just to get the 
> speed advantage* (the difference being that the name gets bound irrespective of 
> whether it originally existed or not).
>
> Anything that could be used to speed up a rebinding, could most likely be used 
> to speed up a standard binding at the same point in the code. So, while it might 
> be possible to get rebinding code which isn't any slower than a standard 
> binding, it seems practically impossible to do anything to get rebinding code to 
> be *faster*.

Well it seems you have some fair points. I'll just stop here stating
that I would like to have it, even if it proved to be slower. Speed
is not that big a factor in the things I write. I just would like
to ask a question relating semantics. Supose the following code.

x = 42

def f():
  x := 21   #  or x .= 42  I don't remember what you used exactly

f()
print x


What do you feel should happen. I can think of two possibilities.

1) It raises an exception because x is not locally bound.

2) it prints 21.


I think the second option would be the more interesting one as
it would allow to get rid of the global statement and it would
allow for rebinding names within nested scopes.

-- 
Antoon Pardon


From tanghaibao at gmail.com  Thu Feb 10 23:19:54 2005
From: tanghaibao at gmail.com (Haibao Tang)
Date: 10 Feb 2005 20:19:54 -0800
Subject: [perl-python] combinatorics fun
In-Reply-To: <cuh4fq$p2l$1@news.xmission.com>
References: <1108075884.250995.62520@g14g2000cwa.googlegroups.com>
	<cuh4fq$p2l$1@news.xmission.com>
Message-ID: <1108095593.988957.22550@c13g2000cwb.googlegroups.com>

I am no longer resisting. As time goes, the nausea when I first saw Mr.
Lee's smelly "technical posts" is starting to fade. The discussion
group should have a high tolerance towards polymorphic people these
days.



From myzhang at gmail.com  Sat Feb 19 19:53:14 2005
From: myzhang at gmail.com (myzhang at gmail.com)
Date: 19 Feb 2005 16:53:14 -0800
Subject: Error when display socekt content
Message-ID: <1108860794.259189.11830@l41g2000cwc.googlegroups.com>

Hello all,

The displayed string looks like some wierd chars (unreadable to human
being at all), when I tried to display the received message by socket.
I read by this line:
  body = self.io.blockingRead (int(header.getFieldCN
('Content-Length')))
  print "socket content: " + body

I am new to python, could you tell me where I did wrong?

Thank you,

Michael



From swaroop at swaroopch.info  Mon Feb 28 06:17:00 2005
From: swaroop at swaroopch.info (Swaroop C H)
Date: Mon, 28 Feb 2005 16:47:00 +0530
Subject: Hey, How Do I Distribute my New Completed Python Project?
In-Reply-To: <1109579904.014493.222540@o13g2000cwo.googlegroups.com>
References: <1109579904.014493.222540@o13g2000cwo.googlegroups.com>
Message-ID: <cvuuhu$q1l$1@sea.gmane.org>

steven at lczmsoft.com wrote:
> I'v just completed a small python project, which includes a main py
> file and a couple of classes in seperated py files.  I can run it under
> the development directory, but how to distribute them?  Is there any
> good practice here?

"Distributing Python Modules"
http://docs.python.org/dist/dist.html

Excerpt:
" This document describes the Python Distribution Utilities
('Distutils') from the module developer's point of view, describing how
to use the Distutils to make Python modules and extensions easily
available to a wider audience with very little overhead for
build/release/install mechanics."

Regards,
-- 
Swaroop C H
Blog: http://www.swaroopch.info
Book: http://www.byteofpython.info



From lard at tardis.ed.ac.molar.uk  Tue Feb  1 08:12:22 2005
From: lard at tardis.ed.ac.molar.uk (Alex Hunsley)
Date: Tue, 01 Feb 2005 13:12:22 GMT
Subject: equivelant of Java's toString() method? (not repr)
Message-ID: <WeLLd.29107$B5.4126@fe1.news.blueyonder.co.uk>

Pretty simple seeming question, but can't find answer via google or docs...

I am using urllib2 as follows:

  handle = urlopen(req, postdata)         # and URL to return a handle 
on
  ...
  print handle.info()

the print statement prints out the headers:

Content-Type: text/html;charset=ISO-8859-1
Content-Length: 2845
Date: Tue, 01 Feb 2005 12:40:28 GMT
Server: Apache Coyote/1.0
Connection: close

which is the string I want to use.
However, if I write a function call using this:

   log(handle.info())

I get this:

  TypeError: cannot concatenate 'str' and 'instance' objects

(The log function expects a string)
What is the magic incantation to get the string I want so I can pass it 
to my function?
I've tried repr() but that isn't it (I suspected it wouldn't be).
I suppose I'm looking for the equivelant of Java's toString() method...

thanks!
alex






From thomas at thomas-lotze.de  Wed Feb 16 03:36:25 2005
From: thomas at thomas-lotze.de (Thomas Lotze)
Date: Wed, 16 Feb 2005 09:36:25 +0100
Subject: Copying data between file-like objects
References: <pan.2005.02.15.09.01.29.555879@ID-174572.user.uni-berlin.de>
	<mailman.2634.1108486380.22381.python-list@python.org>
	<pan.2005.02.15.17.25.13.828572@ID-174572.user.uni-berlin.de>
	<mailman.2680.1108541776.22381.python-list@python.org>
Message-ID: <pan.2005.02.16.08.36.24.538283@ID-174572.user.uni-berlin.de>

Fredrik Lundh wrote:

> copyfileobj copies from the current location, and write leaves the file
> pointer at the end of the file.  a s.seek(0) before the copy fixes that.

Damn, this cannot be read from the documentation, and combined with the
fact that there's no length parameter for a portion to copy either, I
thought copying would mean copying all.

> getvalue() returns the contents of the f2 file as a string, and f1 will
> use that string as the buffer.  there's no extra copying.

Oh, good to know. Then StringIO(f2.getvalue()) or StringIO(f2.read())
would be the way to go.

>> Because I want to manipulate a copy of the data and be able to compare
>> it to the original afterwards.
> 
> why not just use a plain string (or a list of strings)?  your focus on
> StringIO sounds like a leftover from some C library you've been using in
> an earlier life ;-)

Because the data can be a lot, and modifying long strings means a lot of
slicing and copying partial strings around, if I understand right.
Modifying a StringIO buffer is possible in-place. Plus, it's easier to
teach an algorithm that works on a StringIO to use a file instead, so I
may be able to avoid reading stuff into memory altogether in certain
places without worrying about special cases.

> use a plain string and slicing.  (if you insist on using StringIO, use
> seek and read)

OK.

-- 
Thomas




From plb at iotk.com  Tue Feb  8 07:42:42 2005
From: plb at iotk.com (plb)
Date: 8 Feb 2005 04:42:42 -0800
Subject: How to keep a module with the same name as a module it is importing
	from importing itself?
Message-ID: <1107866562.822745.53480@o13g2000cwo.googlegroups.com>


All:

I am struggling with an import problem...

In my package, myapp, I have a module, logging.py.  That module,
naturally, imports the library module logging with an 'import logging'
statement.  However, when I use 'import myapp.logging' in my script,
the myapp.logging module tries to import itself rather than the library
logging module.

How can I prevent this from happening other than using a name that
doesn't conflict?

--PLB



From claudio.grondi at freenet.de  Sat Feb  5 18:54:59 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Sat, 5 Feb 2005 23:54:59 -0000
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot><1107487113.732375.110850@c13g2000cwb.googlegroups.com><opslnmywarej1m1c@ashot><mailman.1865.1107491434.22381.python-list@python.org><opsln54fpwej1m1c@ashot>
	<36hculF51ho2sU1@individual.net><1107530489.308497.103530@g14g2000cwa.googlegroups.com><36hrjpF4ui8fbU1@individual.net>
	<mailman.1911.1107546744.22381.python-list@python.org>
	<36i84qF52ce29U1@individual.net> <opslo127s7ej1m1c@ashot>
	<cu0umf$cja$1@sea.gmane.org>
	<mailman.1936.1107561113.22381.python-list@python.org>
	<opslo7jfhqej1m1c@ashot>
Message-ID: <36l1dgF52b9d6U1@individual.net>

"Ashot" <ashot at removemolsoftthis.com> schrieb im Newsbeitrag
news:opslo7jfhqej1m1c at ashot...
> whoa, that was quick, looks like it works for me.  Thanks a lot!
> It would be nice to be able to set the colors in the prefs file, although
> its possible to edit the pyColorize file as Claudio mentioned.
To get the coloured texts on a grey (instead of white) background
I have extended the Console.py to accept sequences as e.g.
  "0;33;47" (see attachment)
have extended also the
  def make_color_table(in_class):
in the ColorANSI.py of IPython
and adjusted the pyColorize.py file, but it had not the desired effect.
IPython seems not to be sending to Console.py the sequences
defined in the
 LightBGColors = ColorScheme( ... )
section of pyColorize.py (or there is a problem with the
extension I have done to Console.py)
I have just forced Console.py to treat "0;33" as "0;33;47", to
achieve the result I want (see attachment).
It seems, that the  problem with Console.py of the readline module,
is not the only one which existed - there is maybe also a problem
with IPython color schemes handling, so I gave up to try to achieve
a clean nice solution supporting also selection of background colors
for any colorized text output in IPython.
It works for me as it is now, so probably it is better to wait for the
next release of IPython with a cleaner implementation of color
schemes before further efforts towards support for choosing
of background colors for each colorized text output in IPython
via extension of Console.py of the readline module.

Claudio

attachment:
  # Mapping of ANSI color escape sequences into  wAttributes  (Windows
Console
  # Attributes) according to constants #define(d) in WinCon.h for usage
with:
  #   WINBASEAPI BOOL WINAPI SetConsoleTextAttribute(
  #     IN HANDLE hConsoleOutput,
  #     IN WORD wAttributes );
  escape_to_color = {
     '0'   :                     None                        # reset colors
to default setting
  # text color (color of characters):
    # #                Foreground           Background
    # #               I , R , G , B        I , R , G , B       #
Intensified, Red, Green, Blue
    # ,'0;30':      (            0x0)                          # (dark)black
(#000000)
    # ,'0;31':      (    0x4        )                          # (dark)red
(#800000)
    # ,'0;32':      (        0x2    )                          # (dark)green
(#008000)
    # ,'0;33':      (    0x4+0x2    )                          #
(dark)yellow (#808000)
    # ,'0;34':      (            0x1)                          # (dark)blue
(#000080)
    # ,'0;35':      (    0x4+    0x1)                          #
(dark)purple (#800080)
    # ,'0;36':      (    0x4+0x2    )                          # (dark)cyan
(#808000)
    # ,'0;37':      (    0x4+0x2+0x1)                          # (dark)white
(#C0C0C0)
    # #                Foreground           Background
    # #               I , R , G , B        I , R , G , B       #
Intensified, Red, Green, Blue
    # ,'1;30':      (0x8            )                          # light black
(#808080)
    # ,'1;31':      (0x8+0x4        )                          # light red
(#FF0000)
    # ,'1;32':      (0x8+    0x2    )                          # light green
(#00FF00)
    # ,'1;33':      (0x8+0x4+0x2    )                          # light
yellow (#FFFF00)
    # ,'1;34':      (0x8+        0x1)                          # light blue
(#0000FF)
    # ,'1;35':      (0x8+0x4+    0x1)                          # light
purple (#FF00FF)
    # ,'1;36':      (0x8+0x4+0x2    )                          # light cyan
(#FFFF00)
    # ,'1;37':      (0x8+0x4+0x2+0x1)                          # light white
(#FFFFFF)
  # text background color (color of rectangles in which text characters are
displayed):
    #                Foreground           Background
    #               I , R , G , B        I , R , G , B       # Intensified,
Red, Green, Blue
    ,'0;40':                          ((            0x0)<<4) # dark  black
(#000000)
    ,'0;41':                          ((    0x4        )<<4) # dark  red
(#800000)
    ,'0;42':                          ((        0x2    )<<4) # dark  green
(#008000)
    ,'0;43':                          ((    0x4+0x2    )<<4) # dark  yellow
(#808000)
    ,'0;44':                          ((            0x1)<<4) # dark  blue
(#000080)
    ,'0;45':                          ((    0x4+    0x1)<<4) # dark  purple
(#800080)
    ,'0;46':                          ((    0x4+0x2    )<<4) # dark  cyan
(#808000)
    ,'0;47':                          ((    0x4+0x2+0x1)<<4) # dark  white
(#C0C0C0)
    #                Foreground           Background
    #               I , R , G , B        I , R , G , B       # Intensified,
Red, Green, Blue
    ,'1;40':                          ((0x8            )<<4) # light black
(#808080)
    ,'1;41':                          ((0x8+0x4        )<<4) # light red
(#FF0000)
    ,'1;42':                          ((0x8+    0x2    )<<4) # light green
(#00FF00)
    ,'1;43':                          ((0x8+0x4+0x2    )<<4) # light yellow
(#FFFF00)
    ,'1;44':                          ((0x8+        0x1)<<4) # light blue
(#0000FF)
    ,'1;45':                          ((0x8+0x4+    0x1)<<4) # light purple
(#FF00FF)
    ,'1;46':                          ((0x8+0x4+0x2    )<<4) # light cyan
(#FFFF00)
    ,'1;47':                          ((0x8+0x4+0x2+0x1)<<4) # light white
(#FFFFFF)
  # text color (color of characters) on grey background:
    #                Foreground           Background
    #               I , R , G , B        I , R , G , B       # Intensified,
Red, Green, Blue
    ,'0;30;47':   (            0x0) + ((0x8            )<<4) # light black
(#808080)
    ,'0;31;47':   (    0x4        ) + ((    0x4+0x2+0x1)<<4) # (dark)red
(on light grey #C0C0C0)
    ,'0;32;47':   (        0x2    ) + ((    0x4+0x2+0x1)<<4) # (dark)green
(on light grey #C0C0C0)
    ,'0;33;47':   (    0x4+0x2    ) + ((    0x4+0x2+0x1)<<4) # (dark)yellow(
on light grey #C0C0C0)
    ,'0;34;47':   (            0x1) + ((    0x4+0x2+0x1)<<4) # (dark)blue
(on light grey #C0C0C0)
    ,'0;35;47':   (    0x4+    0x1) + ((    0x4+0x2+0x1)<<4) #
(dark)purple(on light grey #C0C0C0)
    ,'0;36;47':   (    0x4+0x2    ) + ((    0x4+0x2+0x1)<<4) # (dark)cyan
(on light grey #C0C0C0)
    ,'0;37;47':   (    0x4+0x2+0x1) + ((    0x4+0x2+0x1)<<4) # (dark)white
(on light grey #C0C0C0)
    #                Foreground           Background
    #               I , R , G , B        I , R , G , B       # Intensified,
Red, Green, Blue
    ,'1;30;40':   (0x8            ) + ((0x8            )<<4) # light black
(#808080)
    ,'1;31;40':   (0x8+0x4        ) + ((0x8            )<<4) # light red
(on dark grey #808080)
    ,'1;32;40':   (0x8+    0x2    ) + ((0x8            )<<4) # light green
(on dark grey #808080)
    ,'1;33;40':   (0x8+0x4+0x2    ) + ((0x8            )<<4) # light yellow
(on dark grey #808080)
    ,'1;34;40':   (0x8+        0x1) + ((0x8            )<<4) # light blue
(on dark grey #808080)
    ,'1;35;40':   (0x8+0x4+    0x1) + ((0x8            )<<4) # light purple
(on dark grey #808080)
    ,'1;36;40':   (0x8+0x4+0x2    ) + ((0x8            )<<4) # light cyan
(on dark grey #808080)
    ,'1;37;40':   (0x8+0x4+0x2+0x1) + ((0x8            )<<4) # light white
(on dark grey #808080)
    #                Foreground           Background
    #               I , R , G , B        I , R , G , B       # Intensified,
Red, Green, Blue
    ,'1;30;0;47': (0x8            ) + ((0x8            )<<4) # light black
(#808080)
    ,'1;31;0;47': (0x8+0x4        ) + ((0x8            )<<4) # light red
(on dark grey #808080)
    ,'1;32;0;47': (0x8+    0x2    ) + ((0x8            )<<4) # light green
(on dark grey #808080)
    ,'1;33;0;47': (0x8+0x4+0x2    ) + ((0x8            )<<4) # light yellow
(on dark grey #808080)
    ,'1;34;0;47': (0x8+        0x1) + ((0x8            )<<4) # light blue
(on dark grey #808080)
    ,'1;35;0;47': (0x8+0x4+    0x1) + ((0x8            )<<4) # light purple
(on dark grey #808080)
    ,'1;36;0;47': (0x8+0x4+0x2    ) + ((0x8            )<<4) # light cyan
(on dark grey #808080)
    ,'1;37;0;47': (0x8+0x4+0x2+0x1) + ((0x8            )<<4) # light white
(on dark grey #808080)
    #                Foreground           Background
    #               I , R , G , B        I , R , G , B       # Intensified,
Red, Green, Blue
    ,'0;30':      (            0x0) + ((    0x4+0x2+0x1)<<4) # (dark)black
(on light grey #C0C0C0)
    ,'0;31':      (    0x4        ) + ((    0x4+0x2+0x1)<<4) # (dark)red
(on light grey #C0C0C0)
    ,'0;32':      (        0x2    ) + ((    0x4+0x2+0x1)<<4) # (dark)green
(on light grey #C0C0C0)
    ,'0;33':      (    0x4+0x2    ) + ((    0x4+0x2+0x1)<<4) #
(dark)yellow(on light grey #C0C0C0)
    ,'0;34':      (            0x1) + ((    0x4+0x2+0x1)<<4) # (dark)blue
(on light grey #C0C0C0)
    ,'0;35':      (    0x4+    0x1) + ((    0x4+0x2+0x1)<<4) #
(dark)purple(on light grey #C0C0C0)
    ,'0;36':      (    0x4+0x2    ) + ((    0x4+0x2+0x1)<<4) # (dark)cyan
(on light grey #C0C0C0)
    ,'0;37':      (    0x4+0x2+0x1) + ((    0x4+0x2+0x1)<<4) # (dark)white
(on light grey #C0C0C0)
    #                Foreground           Background
    #               I , R , G , B        I , R , G , B       # Intensified,
Red, Green, Blue
    ,'1;30':      (0x8            ) + ((    0x4+0x2+0x1)<<4) # light black
(on light grey #C0C0C0)
    ,'1;31':      (0x8+0x4        ) + ((    0x4+0x2+0x1)<<4) # light red
(on light grey #C0C0C0)
    ,'1;32':      (0x8+    0x2    ) + ((    0x4+0x2+0x1)<<4) # light green
(on light grey #C0C0C0)
    ,'1;33':      (0x8+0x4+0x2    ) + ((    0x4+0x2+0x1)<<4) # light
yellow(on light grey #C0C0C0)
    ,'1;34':      (0x8+        0x1) + ((    0x4+0x2+0x1)<<4) # light blue
(on light grey #C0C0C0)
    ,'1;35':      (0x8+0x4+    0x1) + ((    0x4+0x2+0x1)<<4) # light
purple(on light grey #C0C0C0)
    ,'1;36':      (0x8+0x4+0x2    ) + ((    0x4+0x2+0x1)<<4) # light cyan
(on light grey #C0C0C0)
    ,'1;37':      (0x8+0x4+0x2+0x1) + ((    0x4+0x2+0x1)<<4) # light white
(on light grey #C0C0C0)
  }




From adam at eden.com  Wed Feb 16 19:07:16 2005
From: adam at eden.com (Adam)
Date: Thu, 17 Feb 2005 00:07:16 GMT
Subject: Font size
References: <42126822@news.comindico.com.au>
	<ldzqyx6byqdw$.wt8smryc0t3.dlg@40tude.net>
	<42129ea1@news.comindico.com.au>
Message-ID: <4213e033$1@news.comindico.com.au>


"Adam" <adam at eden.com> wrote in message 
news:42129ea1 at news.comindico.com.au...
>
> "BOOGIEMAN" <BOOGIEMANPN at YAHOO.COM> wrote in message 
> news:ldzqyx6byqdw$.wt8smryc0t3.dlg at 40tude.net...
>> On Tue, 15 Feb 2005 21:22:43 GMT, Adam wrote:
>>
>>> Please help me.
>>> How do you clear the screen and then display a number with an enlarged 
>>> font
>>> size (about 300).
>>> Adam.
>>
>> To clear screen in windows :
>>
>> #at the beggining of the program
>> import os
>>
>> #when you want to clear the screen
>> os.system("cls")
>
> Thanks
> I'll try that.
> Adam.
>
Unfortunately that didn't work.
Here's what I'm trying to do.
We are running a numbers game at our retirement village and using a roulette 
wheel to generate the numbers. but this wheel is only about 12 in diameter 
and is little more than a toy. So we came up with the idea of using a random 
number generator to generate numbers from 0 to 36 and display them in large 
figures on my laptop. This is for the benefit of those people who are hard 
of hearing. They like to see what is happening.
I was an RPG programmer before retirement but am new to Python. So I used 
the following code to generate the numbers but I don't know how to display 
them in large figures (about 3 ins high) or get rid of the idle text.

from random import randint
rand = randint(0,36)
print rand

my os = XP
Can you help?
Adam. 




From gabriel.barros at gmail.com  Tue Feb  8 08:43:39 2005
From: gabriel.barros at gmail.com (Gabriel B.)
Date: Tue, 8 Feb 2005 11:43:39 -0200
Subject: Big development in the GUI realm
In-Reply-To: <4207E843.7070403@swiftdsl.com.au>
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<4207E843.7070403@swiftdsl.com.au>
Message-ID: <5175a81c05020805432f12219e@mail.gmail.com>

> > users.  For example, from their FAQ, it seems that no precompiled
> > binaries will be provided.  Support for comercial compilers will not be
> > built in, only for gcc (through Cygwin?).
> 
> Isn't this just the same thing with a different spin. There was always
> an available distribution for linux for non-commercial use. Windows was
> always the problem. You still can't use it for windows without knowing
> how to compile the thing on windows.

Well, if it's GPLed, can't i simply compile it and distribute a GPLed
.DLL with the source code for everyone?


From m.bless at gmx.de  Wed Feb 23 11:06:24 2005
From: m.bless at gmx.de (Martin Bless)
Date: Wed, 23 Feb 2005 16:06:24 GMT
Subject: Can somebody help compiling 'mssqldb.pyd' for Python24 [win]?
Message-ID: <421ca4ee.27298109@news.versatel.de>

I need to access a MSSQL database (MS-Sql, not MySQL!)and would very
much like to use mssql-0.09.tar.gz which is available from 

http://www.object-craft.com.au/projects/mssql/download.html

Unfortunately the binary for Python-2.4 isn't available yet and I'd
hate to step back to a previous version.

I'm glad I managed to set up my XP machine to being able to compile
extensions using the VC++ toolkit which freely availbale from MS. See
my posting "Step by step: Compiling extensions with MS Visual C++
Toolkit 2003" in this group.

The problem is that compiling stops with an error in this case.

Two additional header files are needed: sqlfront.h and sqldb.h. They
can be downloaded as file 'Ptk_I386.exe' here:

<http://support.microsoft.com/default.aspx?scid=kb;en-us;Q186893#kb2>

The problem I have in compiling is:

[...]
c:\Python24-extra-modules\MSSQL-0.09\sqlfront.h(312) : error C2373:
'LPCBYTE' : redefinition; different type modifiers

c:\Programme\Microsoft Platform SDK for Windows XP
SP2\Include\WinSCard.h(43) : see declaration of 'LPCBYTE'

error: command '"c:\programme\Microsoft Visual C++ Toolkit
2003\bin\cl.exe"' failed with exit status 2

Currently I'm not C-Guru enough to find out what's wrong. I'm hoping
somebody else succeeds in compiling and can provide compiled module.

I think the object-craft.com.au staff would gladly accept the binary
as well, as they don't have the appropriate environment right now.

Thanks in advance

mb - Martin


From ajsiegel at optonline.com  Wed Feb  9 20:05:00 2005
From: ajsiegel at optonline.com (Arthur)
Date: Wed, 09 Feb 2005 20:05:00 -0500
Subject: Vectors in Visual Python
References: <1107944975.498403.225950@f14g2000cwb.googlegroups.com>
	<pbvj01tiob4v5i6usnkr08j10s9koeh5kn@4ax.com>
	<1grqqa2.1cnkkbv1l5mrrxN%aleaxit@yahoo.com>
Message-ID: <fccl01heao67ciaekpbk76uooo81nntsg3@4ax.com>

On Thu, 10 Feb 2005 00:16:05 +0100, aleaxit at yahoo.com (Alex Martelli)
wrote:

>Arthur <ajsiegel at optonline.com> wrote:
>
>
>Please clarify if you were making a lame joke without smilies, are
>utterly confused about what "declaration" *MEANS*, or what other folly
>prompted you to this astounding remark, thanks.  

Interesting pedagogical technique all-in-all  Mr. Martelli.

What point is there in trying to help you understand the basis of my
confusion, if my confusion is nothing more than a point of ridicule.

I know exactly what "declaration" is - a fucking word, nothing more
nothing less.

Art



From ajsiegel at optonline.com  Thu Feb 10 08:00:51 2005
From: ajsiegel at optonline.com (Arthur)
Date: Thu, 10 Feb 2005 08:00:51 -0500
Subject: Vectors in Visual Python
References: <1107944975.498403.225950@f14g2000cwb.googlegroups.com>
	<pbvj01tiob4v5i6usnkr08j10s9koeh5kn@4ax.com>
	<1grqqa2.1cnkkbv1l5mrrxN%aleaxit@yahoo.com>
	<isdl015rjvuf7o8gs6ig895m0npefj4aos@4ax.com>
	<1grrgt7.rje1681dh98itN%aleaxit@yahoo.com>
Message-ID: <ovjm01pk59rahm7hilhgrddg560e6oe3h9@4ax.com>

On Thu, 10 Feb 2005 09:59:41 +0100, aleaxit at yahoo.com (Alex Martelli)
wrote:

>Arthur <ajsiegel at optonline.com> wrote:
>
>> thinking that the visciousness with wihich you were attacking someone
>> suggesting a proposal for an optional feature - even if an iill
>> adivised proposal for and ill advised optional feature (I frankly
>> don't care much about that part of the discussion one way or another)
>
>While in my case it's essentially ALL that I care about in this
>discussion: the technical aspects of Python.

Then *only * talk about the technical aspects of Python,  Is my, or
anybody else's stupidity, a technical aspect of Python?
>
>> - was unwarranted, and more importantly *unwise* for someone in a
>
>If, like you, I didn't care about the technical aspects of Python, it
>sure would be unwise to get upset -- I could let the language go to hell
>in a handbasket, as long as I made sure I looked good myself.

Save your fire for real threats - was the exact point I was trying to
make.

Is the questionaing of a newbie on a list Guido doesn't even read a
threat to the fate of Python - technical or otherwise.  Not in the
slightest, tiniest way . What is much more a threat to Python is an
inhospitable, dogmatic.and intimidating community ethos.

Let's not get to Altamont  before we need to.

>
>Caring deeply and passionately about something greater than oneself,
>particularly something which may seem dry and abstract to those who
>don't care a whit for it, might no doubt be deemed intrinsically unwise
>-- and yet, there is much to be said for such passion.  Without the
>ability to get passionate and inflamed, we might perhaps be wiser, but
>we'd be Vulcans, not humans.  Moreover, unless some of us felt such
>passion for certain technical issues, you guys who don't care would not
>get the benefits of the time and energy we freely devote to them -- so
>it's unwise, even from a strictly selfish viewpoint, to try to turn us
>firebrands into such coolly calculating Vulcans.

I appreciate your books indeed,Alex.  They are calm .I'm a customer. I
can study expositions. Not rants.

>
>> postion of community leadership - considering past, recent, and
>> undoubtedly future issues that have and will arise. 
>> 
>> What don't *you* understand about that??
>
>Could you _really_ believe, considering the many years of consistent
>history of my posts on this group, that by reviving the issue you could
>get *any* other effect but fanning the flames all over again?  THAT is
>what I don't understand: whether you're doing that _deliberately_, or
>out of almost-unbelievable levels of cluelessness.

What issue was being "revived"?  There was no issue there being
discussed that is on the table in any serious way.  In that sense it
was a harmless discussion, inititated by someone new to Python, and in
the almost inevitable why this? why that? exploratory assessment
stage.  I think you were candid enough to admit you had had such a
stage yourself. 

Being hardcoded less into any alternative view of the universe when
coming to Python  - i.e. ignorant - I faced much less of this.
Knowing little, I had a very smalll unlearning curve.

My struggle has been almost the opposite - and my lament has not been
why this?, why that?  - but why change this? and why change that?

>
>> We all have are own kinds of stupidities, it seems to me.
>
>This is no doubt the case.  For example, many of us instinctively brake
>and swerve when a small animal jumps into the road in front of the car
>they're driving, seriously endangering themselves and the passengers
>thereby.  If we were presented the issue in a context giving us time to
>reflect and react rationally -- "To how much danger to life and limb
>would you subject yourself, your wife, and your children, to increase
>the likelihood of survival for some stupid cat who can't wait to cross
>the road?" -- we'd probably react quite differently.  And yet, while it
>IS objectively stupid to behave that way, it _is_ one of the stupidities
>that make us human.

If that is your way of admitting perhaps some human overreaction -
attacking as a threat something that rationally is or was not - its
appreciated that you are able to do so.

>
>A _deliberate_ and consistent preference can be disagreed with, but it's
>pretty pointless to call it "stupid" or "unwise"; there is just no
>accounting for tastes.  If you _prefer_ the flame about declarations to
>continue for its own sake (or because you believe it makes you look
>good, whatever), while not caring about its contents, I may consider
>that evil and hateful, but it's neither intelligent nor stupid _per se_.
>If your preferences are otherwise, and yet your behavior is easily seen
>to be such as to have that effect, then THIS is indeed very stupid.


When Guido started thinking out loud about optional static typing he
came under attack most specifcally with the argument that optional
static typing will be technically optional, but in practice will
become mandatory and will therefore fundamentally change Python and
its culture.  

I tried to make the argument that a proposed "optional" feature should
at least find its own range of rhetorical excess, as compared to other
kinds of discussions of possible language design decisions, partly
with that discussion resonating in the background. 

You respnd by pontificating about how the world works.  My instinct is
to go toe-to-toe with you or anybody else on the subject of how the
world works - maybe having a little more time to spend on the subject
in the last 53 years, having spent *less* time on the subject of how
Python works.

We are in a strange culture in Pythonland.  He who knows the most
about Python internals knows all.  A little bizarre.  If Pythonl;and
is to be an innovative  - or even intersting place - it needs, IMO, to
get past this kind of adolescence.

Art  


From john_sips_teaz at yahooz.com  Fri Feb 18 10:14:45 2005
From: john_sips_teaz at yahooz.com (John)
Date: Fri, 18 Feb 2005 10:14:45 -0500
Subject: having troubleing finding package for Twisted 1.3 for Mac OS
 X 10.3.x
In-Reply-To: <1108690646.289866.268380@l41g2000cwc.googlegroups.com>
References: <1108690646.289866.268380@l41g2000cwc.googlegroups.com>
Message-ID: <111c1jbfgb1vl5a@corp.supernews.com>

fuzzylollipop wrote:
> just got a Powerbook and need to do twisted development on it, but I
> can't find a simple straight foward instructions on installing Twisted
> 1.3 on it.
> 
> Also the package manager at undefined.org has 1.1.0 and it doesn't work
> with 10.3.x ( pre-installed Python )
> 
> any help is welcome
> 

I'm pretty sure the package manager at undefined.org had
lapsed into disrepair. IIRC, the author has not updated
it in a long time and doesn't plan to.

Have you tried building from source? It should just be
a simple './configure', 'make', and 'sudo make install',
no?

---J

-- 
--- remove zees if replying via email ---


From notelsie at thorne.id.au  Tue Feb  8 23:44:33 2005
From: notelsie at thorne.id.au (Elspeth Thorne)
Date: Wed, 09 Feb 2005 14:44:33 +1000
Subject: variable declaration
In-Reply-To: <MSGID_2=3A5025=2F3.131_4207fd24@fidonet.org>
References: <1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4207fd24@fidonet.org>
Message-ID: <cuc4fh$25gg$1@bunyip2.cc.uq.edu.au>

Alexander Zatvornitskiy wrote:
 > You may say: give better names for your variables! Ha, I'am often don't
 > understand that they mean! They are written for me by an engineer!


Hang on, though - if you don't understand what you are programming, then 
how can you check if it's correct? Regardless of variable names, 
declarations, or anything else. And besides which - is/was there 
anything preventing you from using different variable names within the 
code (which are understandable to you), then  displaying different names 
to the user (eg an engineer) when an error occurs?

You'd hit the same issues (precisely the same issues) with any language, 
if you flat-out do not know what you are doing - or trying to do.


Admittedly, I have somewhat limited experience, so my word is not 
gospel, or even necessarily well-informed.

But it seems to me that declaring your variables would not fix the 
underlying problem here - the programmer's lack of understanding of the 
task.


Elspeth.


From fredrik at pythonware.com  Sat Feb 12 12:13:52 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 12 Feb 2005 18:13:52 +0100
Subject: Docs. for logging module typo
References: <420e36f6$0$38041$bed64819@news.gradwell.net>
Message-ID: <culdc2$2mn$1@sea.gmane.org>

Peter Mott wrote:

> The documentation for SMTPHandler say "The toaddrs should be a list of strings without domain 
> names (That's what the mailhost is for)." which does not seem to be correct. The toaddr should be 
> a list of strings like 'john at somewhere.com'.

please report bugs and other issues via Python's issue tracker:

    www.python.org => bugs

</F> 





From ben.champion at gmail.com  Thu Feb 24 12:10:03 2005
From: ben.champion at gmail.com (FLChamp)
Date: 24 Feb 2005 09:10:03 -0800
Subject: Vectors in Visual Python
In-Reply-To: <ovjm01pk59rahm7hilhgrddg560e6oe3h9@4ax.com>
References: <1107944975.498403.225950@f14g2000cwb.googlegroups.com>
	<pbvj01tiob4v5i6usnkr08j10s9koeh5kn@4ax.com>
	<1grqqa2.1cnkkbv1l5mrrxN%aleaxit@yahoo.com>
	<isdl015rjvuf7o8gs6ig895m0npefj4aos@4ax.com>
	<1grrgt7.rje1681dh98itN%aleaxit@yahoo.com>
	<ovjm01pk59rahm7hilhgrddg560e6oe3h9@4ax.com>
Message-ID: <1109265003.912263.291520@o13g2000cwo.googlegroups.com>

Thanks for all your help everyone, if only it had addressed what I had
asked I may have actually learned something about Python!!

If anything was addressed to my problem then it has completely passed
me by as most points were clearly made by a computer scientist and I am
not one of those in the slightest. My experience of using any type of
programming language is limited to the little we are taught in my
non-computing subject and hence I have no idea what the below is all
about!! In future example code may be more useful to help newbies like
me :)

"That ``speciufication'' (sic) is no more ``a "declaration"'' than any
other parameter you can pass to a constructor (or any other factory
callable)."



From snail at objmedia.demon.co.uk  Mon Feb 14 09:58:17 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Mon, 14 Feb 2005 14:58:17 +0000
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr>
	<mailman.2527.1108384715.22381.python-list@python.org>
	<4210a3d9$0$23451$626a14ce@news.free.fr>
	<mailman.2530.1108387404.22381.python-list@python.org>
Message-ID: <jn230NTJyLECFwlQ@objmedia.demon.co.uk>

In message <mailman.2530.1108387404.22381.python-list at python.org>, Simon
Brunning <simon.brunning at gmail.com> writes
>On Mon, 14 Feb 2005 14:12:57 +0100, bruno modulix <onurb at xiludom.gro> wrote:
>>
>> Why do you hate Perl and Ruby community that much ?
>
>Oh, I don't. But fair's fair - we've carried our share of the burden, surely?

He is already badgering the Ruby guys. Without about as much success as
this newsgroup. When he doesn't get what he wants a post along the lines
of

        "XXXX lang is only suited to small projects and not real world
        industrial projects"
or
        "the community doesn't care"
will appear.

Its quite incredible - in the time he has spent complaining he could
have done his own research and written some useful tools. I know how
long it took me to write my first major C++ app that interfaced with
Python and Ruby. It was less time than he has spent complaining - and
that included rebuilding Python/Ruby, inspecting the source for what I
needed and performing many experiments before I succeeded.

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From nhodgson at bigpond.net.au  Fri Feb 18 18:31:51 2005
From: nhodgson at bigpond.net.au (Neil Hodgson)
Date: Fri, 18 Feb 2005 23:31:51 GMT
Subject: unicode encoding usablilty problem
References: <opsmekm2ei6yt6e7@news.cisco.com>
	<42164d01$0$4676$9b622d9e@news.freenet.de>
Message-ID: <HVuRd.166413$K7.113158@news-server.bigpond.net.au>

Martin v. L?wis:

> Eventually, the primary string type should be the Unicode
> string. If you are curious how far we are still off that goal,
> just try running your program with the -U option.

   Tried both -U and sys.setdefaultencoding("undefined") on a couple of my
most used programs and saw a few library problems. One program reads job
advertisements from a mailing list, ranks them according to keywords, and
displays them using unicode to ensure that HTML entities like &bull; are
displayed correctly. That program worked without changes.

   The second program reads my spam filled mail box removing messages that
match a set of header criteria. It uses decode_header and make_header from
the email.Header library module to convert each header from a set of encoded
strings into a single unicode string. As email.Header is strongly concerned
with unicode, I expected it would be able to handle the two modifications
well.

   With -U, there was one bug in my code assuming that a string would be 8
bit and that was easily fixed. In email.Charset, __init__ expects a
non-unicode argument as it immediately calls unicode(input_charset, 'ascii')
which fails when the argument is unicode. This can be fixed explicitly in
the __init__ but I would argue for a more lenient approach with unicode(u,
enc, err) always ignoring the enc and err arguments when the input is
already in unicode. Next sre breaks when building a mapping array because
array.array can not have a unicode type code. This should probably be fixed
in array rather than sre as mapping = array.array('b'.encode('ascii'),
mapping).tostring() is too ugly. The final issue was in encodings.idna where
there is ace_prefix = "xn--"; uace_prefix = unicode(ace_prefix, "ascii")
which again could avoid breakage if unicode was more lenient.

   With sys.setdefaultencoding("undefined"), there were more problems and
they were harder to work around. One addition that could help would be a
function similar to str but with an optional encoding that would be used
when the input failed to convert to string because of a UnicodeError.
Something like

def stri(x, enc='us-ascii'):
    try:
        return str(x)
    except UnicodeError:
        return unicode(x).encode(enc)

   Neil




From steve at myplace.com  Mon Feb 21 16:54:10 2005
From: steve at myplace.com (Steve M)
Date: Mon, 21 Feb 2005 15:54:10 -0600
Subject: Tuple index
References: <cvbcc6$b5f$1@news.netins.net>
	<1108951559.490554.305310@l41g2000cwc.googlegroups.com>
	<cvdian$ejs$1@news.netins.net> <zvOdneQkB6SyzoffRVn-jw@comcast.com>
Message-ID: <cvdll3$f4u$1@news.netins.net>

Steven Bethard wrote:

> Steve M wrote:
>> I guess I explained my problem incorrectly. Let me try again.
>> 
>> tuple = ("fred", "barney", "foo")
>> 
>> I know that foo is an element of tuple, but what I need to know is what
>> the index of foo is, tuple[?].
> 
> Larry Bates's solution is probably the best way to go here:
> 
> py> t = ("fred", "barney", "foo")
> py> list(t).index("foo")
> 2
> py> t[2]
> 'foo'
> 
> But note that if you're doing this often, you're probably using tuple
> for the wrong things.  Check out:
> 
> http://www.python.org/doc/faq
general.html#why-are-there-separate-tuple-and-list-data-types
> 
> If you're iterating over the items of something and the items are all of
>   the same type, you probably want a list, not a tuple.
> 
> What's the use case in which you want to do this?
> 
> STeVe

I'm actually doing this as part of an exercise from a book. What the program
is supposed to do is be a word guessing game. The program automaticly
randomly selects a word from a tuple. You then have the oportunity to ask
for a hint. I created another tuple of hints, where the order of the hints
correspond to the word order. I was thinking if I could get the index
position of the randomly selected word, I pass that to the hints tuple to
display the correct hint from the hints tuple. I'm trying to do it this way
as the book I'm using has not gotten to lists yet. As you may have guessed,
I'm just learning Python. I do appreciate your help, Thank you.

Steve


From donn at drizzle.com  Fri Feb  4 02:16:07 2005
From: donn at drizzle.com (Donn Cave)
Date: Fri, 04 Feb 2005 07:16:07 -0000
Subject: managing multiple subprocesses
References: <1107389416.531437.227160@l41g2000cwc.googlegroups.com>
	<mailman.1830.1107454279.22381.python-list@python.org>
Message-ID: <1107501365.522574@yasure>

Quoth Skip Montanaro <skip at pobox.com>:
| >>>>> "Marcos" == Marcos  <seejadee at gmail.com> writes:
|
|     Marcos> I have tried all sorts of popens / excevs / os.systems /
|     Marcos> commands etc etc. 
|
| I think os.spawn* and os.wait will do what you want.  I have trouble with
| os.spawn* myself, so may just fall back to fork/exec + os.wait in the
| parent.

That's probably the ticket.  There are endless variations on how you
can use these functions (especially if you include pipe() and the dup
fcntls), and in a way it may be simpler to write your own variation
than work with a packaged one that does approximately what you need.
As long as it doesn't need to run on Windows.

By the way, I never ever use the *p versions of these functions, and
always specify the full path of the executable.  I don't use the the
C library versions, and I don't use the Python versions.  The latter
aren't actually C library function wrappers, but rather like I think
most shells they contrive to look through PATH themselves, and at any
rate it's difficult to deal with the lookup failure in a useful way
in the child fork.  No doubt there are situations where a path lookup
is essential, but it just hasn't been happening to me.

	Donn Cave, donn at drizzle.com


From carribeiro at gmail.com  Sat Feb  5 10:05:10 2005
From: carribeiro at gmail.com (Carlos Ribeiro)
Date: Sat, 5 Feb 2005 13:05:10 -0200
Subject: empty classes as c structs?
In-Reply-To: <36jb88F521hqhU1@individual.net>
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<6%PMd.33662$EG1.31801@lakeread04> <36jb88F521hqhU1@individual.net>
Message-ID: <864d37090502050705219c7a6@mail.gmail.com>

On Sat, 05 Feb 2005 02:38:13 -0500, Leif K-Brooks <eurleif at ecritters.biz> wrote:
> Actually, in Python, class definitions are runtime executable statements
> just like any other. You can do this:
> 
>  >>> def make_class(with_spam=True):
> ...  if with_spam:
> ...   class TheClass(object):
> ...    def dostuff(self):
> ...     print 'Spam, spam, spam, spam!'
> ...  else:
> ...   class TheClass(object):
> ...    def dostuff(self):
> ...     print "I don't like spam!"
> ...  return TheClass

The real power of the class statement is that you can code it this way:

class TheClass(object):
    if with_spam:
        def dostuff(self):
            print 'Spam, spam, spam, spam!'
    else:
        def dostuff(self):
            print "I don't like spam!"

Instead of creating two classes in separate branches of the if
statement, you can as well use the if inside the class statement. It's
perfectly valid. Of course, one still has to feed it with the
'with_spam' argument - but if 'with_spam' is a global, or if the class
statement wrapped inside a function that defines 'with_spam', it will
work just as fine.

-- 
Carlos Ribeiro
Consultoria em Projetos
blog: http://rascunhosrotos.blogspot.com
blog: http://pythonnotes.blogspot.com
mail: carribeiro at gmail.com
mail: carribeiro at yahoo.com


From abuse at solumslekt.org  Tue Feb 22 19:02:59 2005
From: abuse at solumslekt.org (Leif B. Kristensen)
Date: Wed, 23 Feb 2005 01:02:59 +0100
Subject: python tutorial/projects
References: <cvgf2o$u42$1@agate.berkeley.edu>
Message-ID: <TKPSd.9826$Sl3.304799@news4.e.nsc.no>

Danny skrev:

> Does anyone know of a good python tutorial?
> I was also looking for some non-trivial projects to do in python.
 
There's a lot of projects on Sourceforge that are written in Python,
where you're free to study the code and maybe participate, if you've
got what it takes.
 
> Basically I would like to claim on my resume, that I know python, with
> out bad karma.

Your stance is a difficult one, and one that is hard to conciliate with
the Zen of Hacking. Search for enlightenment first, my son, and the
rest will be given to you freely.
-- 
Leif Biberg Kristensen


From mesteve_bpleaseremovethis at hotmail.com  Sun Feb 13 19:58:39 2005
From: mesteve_bpleaseremovethis at hotmail.com (StvB)
Date: Mon, 14 Feb 2005 00:58:39 GMT
Subject: OS env for Windows
Message-ID: <3JSPd.4708$aW6.1365@newssvr22.news.prodigy.net>

Hi, have wxHtmlWindow question here.

On my OnLinkClicked handler, I do the following:
---------------

def OnLinkClicked(self,linkinfo):
    f = wx.TheMimeTypesManager.GetFileTypeFromExtension('.html')
    if not f:
       return

    try:
        cmd = wx.FileType.GetOpenCommand(f,linkinfo.GetHref())
        wx.Execute(cmd)
    except:
        wxMessageBox("Something unexpected 
happened","MyApp",wxOK|wxICON_INFORMATION )

---------------

If I'm on my Windows 2000 machine at work, when I attempt to execute the 
default browser action,
 with wx.Execute,  I first get a freeze on my app ( with the About box 
showing, where I have the html
window situated). And the browser is trying to open, but instead, after a 
long delay:

"dde execute request failed: a request for a synchronous execute transaction 
has timed out"


On my XP system at home, Firefox comes up fine, and very quickly.

Main question:
I tried to add an If condition, to test for the 'OS' env variable, but this 
won't work I realize,after
noticing that *both* 2000 and XP have the value: WINDOWS_NT.

Is there any other way
of distinguishing between XP and 2000 I wonder?

Steve 




From luismgz at gmail.com  Tue Feb  8 21:35:09 2005
From: luismgz at gmail.com (Luis M. Gonzalez)
Date: 8 Feb 2005 18:35:09 -0800
Subject: Pypy - Which C modules still need converting to py?
In-Reply-To: <opslwus5w41js0xs@news.telkomsa.net>
References: <opslwus5w41js0xs@news.telkomsa.net>
Message-ID: <1107916509.526038.319820@l41g2000cwc.googlegroups.com>

Also you can browse the Pypy-Dev archives here:
http://codespeak.net/pipermail/pypy-dev/
and post messages here: pypy-dev at codespeak.net

regards,
Luis



From aleaxit at yahoo.com  Sat Feb  5 14:02:44 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 5 Feb 2005 20:02:44 +0100
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<qb1a01lk3mv4vp852q88prqb9al336h9r2@4ax.com>
Message-ID: <1grj036.r13xcy1d72inbN%aleaxit@yahoo.com>

Arthur <ajsiegel at optonline.com> wrote:

> On Sat, 5 Feb 2005 17:00:15 +0100, aleaxit at yahoo.com (Alex Martelli)
> wrote:
> >
> >I consider this one of the worst ideas to have been proposed on this
> >newsgroup over the years, which _IS_ saying something. \
> 
> I would disagree, but only to the extent that nothing that is only a
> request for an option toggle should qualify for this award.  For
> anyone not interested in it's effects, it's business as usual.

You must have lead a charmed life, I think, unusually and blissfully
free from pointy-haired bosses (PHBs).  In the sublunar world that most
of us inhabit, ``optional'' idiocies of this kind soon become absolutely
mandatory -- thanks to micromanagement by PHBs.

For the last few years I've been working as a consultant -- mostly
(thanks be!) for a wonderful Swedish customer whose managers are in fact
great techies, but otherwise for a fair sample of typical development
shops.  Such "fair samples" have weaned me from my own mostly-charmed
blissful life, confirming that the amount of utter stupidity in this
world is REALLY high, and far too much is that is in management
positions.

Now, I've recently had a great offer to work, doing mostly Python, for
another incredibly great firm, and, visa issues permitting, I'll gladly
leave the life of consultants' joys and sorrows behind me again -- I've
spent most of my life working as a full-time employee for a few great
firms, and the last few years have confirmed to me that this fits my
character and personality far better than being a consultant does (just
like the years between my two marriages have confirmed to me that I'm
better suited to be a husband, rather than a roving single... I guess
there's a correlation there!-).  So, I'm not speaking for selfish
reasons: at my soon-to-be employer, techies rule, and optional idiocies
won't matter much.  I _am_ speaking on behalf of maybe half of the
million or so Python programmers in the world, who are NOT so lucky as
to be working in environments free from the blight of micromanagement.


Alex


From eq_fidget at mac.com  Sun Feb  6 23:59:04 2005
From: eq_fidget at mac.com (Jonathan Polley)
Date: Mon, 07 Feb 2005 04:59:04 GMT
Subject: Unable to run IDLE Under Windows
Message-ID: <060220052259038640%eq_fidget@mac.com>

I have one account on a WindowsXP machine that refuses to run IDLE (or
any other python script that uses Tk).  Other people can login to that
PC and IDLE runs just fine, so it is not an installation issue.  When
the person who has the problem logs into another PC the problem follows
them.  Any ideas as to what might me wrong?

This is the traceback from IDLE:

C:\Python20\Tools\idle>..\..\python.exe idle.py
Traceback (most recent call last):
  File "idle.py", line 12, in ?
    PyShell.main()
  File "C:\Python20\Tools\idle\PyShell.py", line 732, in main
    root = Tk(className="Idle")
  File "c:\python20\lib\lib-tk\Tkinter.py", line 1482, in __init__
    self.tk = _tkinter.create(screenName, baseName, className)
TclError: unknown color name "white "

C:\Python20\Tools\idle>

Thanks in advance,

Jonathan Polley

jwpolley rockwellcollins com


From v451v at yahoo.com  Fri Feb 25 13:35:09 2005
From: v451v at yahoo.com (Jorl Shefner)
Date: Fri, 25 Feb 2005 13:35:09 -0500
Subject: Minor, but annoying legend problem in matplotlib
Message-ID: <3899dfF5n29uuU1@individual.net>


   I have a problem that I run into a lot with the 'legend' command's 
default behavior.  I've found a work-around but I wonder if there's a 
better way.

   For a simple example, take the following:
________________________________

    x= [1,2,3,4,5,6,7,8]
    a= [5,3,2,4,6,5,8,7]
    b= [4,1,3,5,2,8,3,6]
    c= [8,4,9,6,7,3,9,4]
    
    DataSets= [a,b,c]
      
    Symb= ['k-o','k--s','k-.^']
              
    for index,d in enumerate(DataSets):
              
        plot(x,DataSets[index],Symb[index])
              
    legend(["a","b","c"])
_______________________________

   This behaves just as I would want it to.  Normally, though I want 
'open' markers, which (AFAIK) require me to set the color to 'w' 
(white), and so the (white-on-white) lines won't show up in this case 
(the markers still have black outlines).  I tried using two colors in 
one marker definition, 'k-wo', but that didn't work.

   The obvious solution is to plot the lines and symbols in two 
different commands:
_______________________________

    Symb= ['wo','ws','w^']
    LineType= ['k-','k--','k-.']
    
    for index,d in enumerate(DataSets):
        
        plot(x,DataSets[index],LineType[index])
        plot(x,DataSets[index],Symb[index])
        
    legend(["a","b","c"])    
_______________________________

   This produces the correct plot, but the legend here alternates 
between symbol and marker in its what uses for designating each dataset 
(a uses 'marker a', b uses 'line b', c uses 'marker c').
   Is there some rationale for this being the default behavior?  

   The workaround I've found has been to use two separate loops for the 
symbol and line plotting:

_______________________________


    Symb= ['wo','ws','w^']
    LineType= ['k-','k--','k-.']
    
    #Loop 1
    for index,d in enumerate(DataSets):
        
        plot(x,DataSets[index],LineType[index])

    # Loop 2
    for index,d in enumerate(DataSets):
        
        plot(x,DataSets[index],Symb[index])
        
    legend(["a","b","c"]) 
_______________________________ 

   This works and will give me a legend that uses only marker symbols in 
it, as desired.   It's not an ideal solution though as I often have some 
moderate amount of processing within the loop that I'd rather not have 
to repeat or write out to some temporary variable just in order to have 
it available for the second loop.
   I've gotten around this before for somewhat similar cases using 
suggestions from this group of explicitly defining the values the legend 
will use:

L1= plot(x,y,...

 but I can't figure how to do this here because of the looping over the 
data sets.  

   On a related note, is there any way to increase the size of the 
markers within the legend? 

TIA,

J.S.

-- 
Actual e-mail:  <Firstname> 'dot' <Lastname> @comcast.net


From peter at engcorp.com  Wed Feb 16 15:48:41 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 16 Feb 2005 15:48:41 -0500
Subject: web spider and password protected pages
In-Reply-To: <1108580601.884193.263890@g14g2000cwa.googlegroups.com>
References: <1108580601.884193.263890@g14g2000cwa.googlegroups.com>
Message-ID: <_LudnUg0vJIsLI7fRVn-rA@powergate.ca>

jdonnell wrote:
> I've been writing a simple web spider for fun, and I've run into a
> problem I can't figure out. The spider hangs (waits for username and
> pass) when I hit a page that requires .htaccess authentication.
> 
> self.f = urllib.urlopen('http://blogbloc.com/~jay/test/')
> #nothing below here gets executed
> print self.f.info()
> ...
> 
> It hangs as soon as I call urllib.urlopen(). I was going to try to read
> the info and break for pages that require authentication, but it hangs
> before I can call self.f.info()
> 
> Any ideas?

I tried Google.  First I looked for "python urlopen authentication".
I scanned the top page for the word "authentication" and found a
few references, then something called FancyURLOpener.  Adding that
to my search, skipping down a couple of links, I quickly found
a page that starts "Here is an explanation about how to handle password
protected sites."

Another approach that often works is to throw in the word
"recipe", hoping perhaps to get a hit in the Python Cookbook
page: try "python http authentication recipe", for example.

I hope that teaches you a bit about how to fish, rather than
just giving you one. ;-)

-Peter


From wuwei23 at gmail.com  Thu Feb 17 20:44:21 2005
From: wuwei23 at gmail.com (alex23)
Date: 17 Feb 2005 17:44:21 -0800
Subject: [perl-python] exercise: partition a list by equivalence
In-Reply-To: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
Message-ID: <1108691061.880747.95210@l41g2000cwc.googlegroups.com>

>For those of you unfamiliar with math lingoes, partition a list means
> to create sublists, based on some criteria.

Typical moronic mathematicians with their exclusionary lingoes...why
can't they just say "create sublists based on some criteria" like
normal people?

- alex23



From A.Schmolck at ex.ac.uk  Sat Feb 19 09:07:06 2005
From: A.Schmolck at ex.ac.uk (Alexander Schmolck)
Date: Sat, 19 Feb 2005 14:07:06 +0000
Subject: [ANN] mlabwrap v0.9b3
References: <mailman.2836.1108821105.22381.python-announce-list@python.org>
Message-ID: <yfswtt4iqyd.fsf@black4.ex.ac.uk>

Alexander Schmolck <a.schmolck at gmx.net> writes:

> I'd very much like to hear some feedback (even if it's just "works fine").

Sorry to anyone who got a bounce -- obviously just on the day I write this my
email account gets "temporarily deactivated" -- till I sort this out, please
send feedback to <a.schmolck at ex.ac.uk> instead.

There also will be a user mailing list at
<mlabwrap-user at lists.sourceforge.net>

'as


From aahz at pythoncraft.com  Fri Feb 11 13:23:51 2005
From: aahz at pythoncraft.com (Aahz)
Date: 11 Feb 2005 13:23:51 -0500
Subject: is there a safe marshaler?
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<420b9135$0$28982$e4fe514c@news.xs4all.nl>
	<3b091a1c.0502110634.5edb1987@posting.google.com>
	<mailman.2405.1108144870.22381.python-list@python.org>
Message-ID: <cuit7n$jje$1@panix3.panix.com>

In article <mailman.2405.1108144870.22381.python-list at python.org>,
Skip Montanaro  <skip at pobox.com> wrote:
>
>    Carl> but can't effbot's fast cElementree be used for PYROs XML_PICKLE
>    Carl> and would it be safe and fast enough?
>
>It's not clear to me that if marshal is unsafe how XML could be safe.  In
>this context they are both just serializations of basic Python data
>structures.

The difference is that parsing XML -- even badly malformed -- won't
crash Python.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From fperez.net at gmail.com  Sun Feb  6 18:38:46 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Sun, 06 Feb 2005 16:38:46 -0700
Subject: empty classes as c structs?
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<7rSdne7BcbDeV57fRVn-jg@comcast.com>
	<mailman.1963.1107594941.22381.python-list@python.org>
	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>
	<mailman.1973.1107618702.22381.python-list@python.org>
	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>
	<mailman.2006.1107658273.22381.python-list@python.org>
	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>
	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>
	<4qCdnXM11-uVGJvfRVn-vQ@comcast.com>
	<1grl4od.1niw3nhvo753cN%aleaxit@yahoo.com>
	<OJ6dnbavcfTpAJvfRVn-ow@comcast.com>
Message-ID: <cu69oc$lg4$1@sea.gmane.org>

Steven Bethard wrote:

> The complications with attribute hiding is one of main reasons I've
> tried to minimize the number of methods associated with Bunch...

in order for bunches to be fully useful in general, open contexts, I think that
number of methods should be exactly zero (at least without leading
underscores).  Otherwise, as soon as someone loads a config file into a bunch
and they assign randomname_which_you'd_used, the whole thing breaks.

I see two ways to implement additional (needed) functionality into bunches:

1. The class/staticmethod approach.  This has clean syntax, though it may make
inheritance issues tricky, I'm not too sure.

2. To break with pythonic convention a bit, and make the public API of Bunch
consist of methods which all start with a leading _.  You can even (via
__setattr__ or metaclass tricks) block assignment to these, and state up front
that Bunches are meant to hold public data only in attributes starting with a
letter.  I think that would be a reasonable compromise, allowing you to do:

b = Bunch()
b.update = 'yes'
b._update(somedict)
b.copy = 'no'
c = b._copy()

# BUT:
c._update = 'no' ## an exception is raised

etc.

It's not very pretty, and it does break with pythonic convention.  But a Bunch
class which simultaneously provides certain non-trivial functionality
(otherwise the usual 'class Bunch:pass' idiom would be enough), while allowing
users to store arbitrarily named attributes in it, is inevitably going to need
to play namespace tricks somewhere.  

FWIW, I personally could live with #2 as an acceptable compromise.

Cheers,

f



From Serge.Orlov at gmail.com  Wed Feb 23 16:42:43 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: Wed, 23 Feb 2005 21:42:43 +0000 (UTC)
Subject: LC_ALL and os.listdir()
References: <mailman.2959.1109142240.22381.python-list@python.org>
	<421cf088$0$8788$9b622d9e@news.freenet.de>
Message-ID: <cvitch$111q$1@news.comcor-tv.ru>

"Martin v. L?wis" wrote:
>> My goal is to build generalized code that consistently works with all
>> kinds of filenames.
>
> Then it is best to drop the notion that file names are
> character strings (because some file names aren't). You
> do so by converting your path variable into a byte
> string. To do that, you could try
>
> path = path.encode(sys.getfilesystemencoding())

Shouldn't os.path.join do that? If you pass a unicode string
and a byte string it currently tries to convert bytes to characters
but it makes more sense to convert the unicode string to bytes
and return two byte strings concatenated.

  Serge.




From lkoski at sandisk.com  Tue Feb 22 06:44:36 2005
From: lkoski at sandisk.com (Liat Koski)
Date: Tue, 22 Feb 2005 03:44:36 -0800
Subject: pydoc documentation- referred to Michele answer
Message-ID: <5A581EC513B13048BE69A41625506074592856@ilex1.sandisk.local>

Hellow Michele,
This systax is working only with bulid in modules, like 'sys' for example
But not for personal programs.
Am i wrong??
Can you please send me some syntax example you have? cause i'm getting syntax error that i don't know how to solve

Thanks
Liat

-----Original Message-----
From: Michele Simionato [mailto:michele.simionato at gmail.com]
Sent: Tuesday, February 22, 2005 12:16 PM
To: python-list at python.org
Subject: Re: pydoc documentation


$ pydoc -g


        M.S.




From friedmud at gmail.com  Mon Feb 14 22:53:10 2005
From: friedmud at gmail.com (friedmud at gmail.com)
Date: 14 Feb 2005 19:53:10 -0800
Subject: Inheritance error in python 2.3.4???
In-Reply-To: <mailman.2593.1108426522.22381.python-list@python.org>
References: <338366A6D2E2CA4C9DAEAE652E12A1DE02520362@au3010avexu1.global.avaya.com>
	<mailman.2593.1108426522.22381.python-list@python.org>
Message-ID: <1108439590.724675.252900@f14g2000cwb.googlegroups.com>

Thanks guys for all your input!  I really appreciate the prompt
replies!

As you can tell I'm having a bit of trouble throwing out old habits...
I'm not new to loosely typed languages (I'm a big PHP fan) but learning
a new object model has been a little tough... I'm trying to make my old
ideas fit a new language (which is a bad idea in general).

So thanks for setting me straight.  I hadn't yet heard of "properties"
it looks like it does what I want... so I will check them out further.
But if they don't do what I want I will probably just use a single
underscore and ummmm trust my users ;-)    (In general, C++ people
aren't a trusting bunch.... Auto Garbage collection!!?!???!
What!?!???!  ;-)

Thanks again for the replies,
Friedmud



From jason at tishler.net  Tue Feb  1 07:51:29 2005
From: jason at tishler.net (Jason Tishler)
Date: Tue, 1 Feb 2005 07:51:29 -0500
Subject: Building Python with Tcl/Tk on Cygwin_NT-5.1
In-Reply-To: <41FF5A67.3090606@llnl.gov>
References: <41FF5A67.3090606@llnl.gov>
Message-ID: <20050201125129.GA432@tishler.net>

Dean,

On Tue, Feb 01, 2005 at 02:31:03AM -0800, Dean N. Williams wrote:
> I am trying to build Python with Tcl/Tk under the Cygwin_NT-5.1 OS. 
> Has anyone done this?

Yes, Cygwin Python with _tkinter has been part of the standard Cygwin
distribution for over three years:

    http://www.cygwin.com/ml/cygwin-announce/2001/msg00118.html
    
> Do I need to build tcl8.4.9 and tk8.4.9 under the unix directory or
> the win directory.

No, Tcl/Tk is part of the standard Cygwin distribution too.

> I found that the Tcl/Tk unix directories compiled just fine and built
> the libtcl8.4.a and libtk8.4.a libraries for use. But I don't think
> that Python is looking for this. If you've built Python with Tcl/Tck,
> is it possible for you to send me instructions on how you did it?

See the Cygwin Python README:

    http://www.tishler.net/jason/software/python/python-2.4.README

BTW, why don't you just use the pre-built Cygwin Python?

Jason

-- 
PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6


From enleverlesO.OmcO at OmclaveauO.com  Mon Feb 14 07:14:40 2005
From: enleverlesO.OmcO at OmclaveauO.com (Do Re Mi chel La Si Do)
Date: Mon, 14 Feb 2005 13:14:40 +0100
Subject: keeping a COM server alive
References: <1108382003.358573.132710@c13g2000cwb.googlegroups.com>
Message-ID: <42109641$0$6592$8fcfb975@news.wanadoo.fr>

Hi !

I had also make a Python-COM-server.
But, when I launch several clients, I obtain several instances of my
COM-server.

Finally, there are advantages and disadvantages in this established fact.
But I can't use this way for to exchange data between several clients. For
that, I use a TCP local server.

@-salutations
-- 
Michel Claveau



note : the same problem come with Microsoft's dictionnary COM server.






From ncoghlan at iinet.net.au  Fri Feb 11 09:42:00 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 12 Feb 2005 00:42:00 +1000
Subject: Is this a bug? BOM decoded with UTF8
In-Reply-To: <373sj3F590j6iU1@individual.net>
References: <epMOd.357$7m.215@read3.inet.fi>	<420bc317$0$4925$9b622d9e@news.freenet.de>	<KT1Pd.641$gz1.258@read3.inet.fi>	<373p8vF57039vU1@individual.net>	<mailman.2392.1108129900.22381.python-list@python.org>
	<373sj3F590j6iU1@individual.net>
Message-ID: <420CC438.1020605@iinet.net.au>

Diez B. Roggisch wrote:
> So they admit that it makes no sense - especially as decoding a utf-8 string
> given any 8-bit encoding like latin1 will succeed.
> 
> So in the end, I stand corrected. But I still think its crap - But not MS
> crap. :)

Oh, good. I'm not the only person who went "A BOM in UTF-8 data? WTF do you need 
a byte order marker for when you have 8-bit data?"

It also clarifies Martin's comment about the UTF-8 codec ignoring the existence 
of this piece of silliness :)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From mwm at mired.org  Tue Feb  8 20:24:55 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 08 Feb 2005 19:24:55 -0600
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<cu8h8k$md4$1@sea.gmane.org> <4207D64F.2000709@optushome.com.au>
	<mailman.2184.1107872445.22381.python-list@python.org>
Message-ID: <86acqe8qzc.fsf@guru.mired.org>

"Gabriel B." <gabriel.barros at gmail.com> writes:

>> >>Considering the fact that the Qt DLL exist by themselves, that the
>> >>version used is the one provided by Qt, and that the EXE uses a
>> >>standard, open way to communicate with it, the above does seem to say
>> >>this use would be valid.
>> >>
>> >>
>> >
>> >    http://www.gnu.org/licenses/gpl-faq.html#MereAggregation
>> >
>> >    "/.../ If modules are designed to run linked together in a shared address
>> >    space, that almost surely means combining them into one program.
>> >
>> >    By contrast, pipes, sockets and command-line arguments are
>> >    communication mechanisms normally used between two separate
>> >    programs. So when they are used for communication, the modules
>> >    normally are separate programs. But if the semantics of the
>> >    communication are intimate enough, exchanging complex internal
>> >    data structures, that too could be a basis to consider the two parts
>> >    as combined into a larger program."
>> >
>> ></F>
>
> This is odd. They claim it's a GPL'ed version, but it's a trolltech
> license that forces you to release your code under gpl even tought
> their's not!
>
> I'm not against a company getting it's share with their product.
> that's what motivated them in the first place. but DONT LIE! don't
> call it gpl when it's not.
>
> Gpl make it very explicity it deals with the program as a whole, in
> the meaning of a executable code. What they're trying to achive here
> is that, by adding this paragraph, they will cover the "dll use" under
> the gpl.
>
> By that cover-all definition they came up, i can't use Internet
> Explorer to see a site hosted with a gpl'ed server! i can't even use a
> BSD program to grep a file!

Now the latter isn't true, because the BSD license isn't viral.

On the other hand, you're conflating data and code. If that stands,
then you'd be only be allowed to distribute code written with GNU
Emacs under the GPL, which is goes against long-standing position of
the FSF on GNU Emacs.

    <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From jkjone2002 at att.net  Thu Feb 17 10:08:44 2005
From: jkjone2002 at att.net (john san)
Date: Thu, 17 Feb 2005 10:08:44 -0500
Subject: [newbie]How to install python under DOS and is there any
	Wxpython can be installed under dos?
References: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
	<1108557065.547230.254540@z14g2000cwz.googlegroups.com>
	<b9-dnTQOwoYK647fRVn-2Q@rogers.com>
	<11172sa1sg2svc8@corp.supernews.com>
	<l4OdneC_7ZH2oInfRVn-3A@rogers.com>
	<zkZQd.9062$Sl3.275762@news4.e.nsc.no>
Message-ID: <BdudnbUFX6GHKYnfRVn-3Q@rogers.com>

Of course you can install Linux on xbox but its too "heavy" to the box.
Since the box  already has the OS and we have the prog which support the
"Python" , what we need now is only let that "Python" can be easy to coding
and to show windows-like program.



"Leif B. Kristensen" <abuse at solumslekt.org> ????
news:zkZQd.9062$Sl3.275762 at news4.e.nsc.no...
> john san skrev:
>
> > Actually the "windows" running very good under the xbox-NTOS via
> > xboxmediacenter. its just limited functions(not easy to programming
> > the "windows" prog.), if we can find WxPython-like can be ported (I
> > can import *
> > from it  to my xboxPython) )it will be a great great ......... You
> > will have HD screen and web surfing on HDTV and computing on HDTV.
> > think about it! That is a real thing the python-like lang. should to
> > do otherwise just a garbage(toy).
>
> You can run Linux with MythTV on an XBox. Does all the things you want,
> and of course it will run WxPython.
> -- 
> Leif Biberg Kristensen
>




From michele.simionato at gmail.com  Wed Feb 16 11:56:28 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 16 Feb 2005 08:56:28 -0800
Subject: low-end persistence strategies?
In-Reply-To: <7x7jl8bhii.fsf@ruckus.brouhaha.com>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<1108570047.677348.146850@f14g2000cwb.googlegroups.com>
	<7x7jl8bhii.fsf@ruckus.brouhaha.com>
Message-ID: <1108572988.341139.126020@z14g2000cwz.googlegroups.com>

The documentation hides this fact (I missed that) but actually python
2.3+ ships
with the pybsddb module which has all the functionality you allude too.
Check at the test directory for bsddb.

              Michele Simionato



From harlinseritt at yahoo.com  Thu Feb 24 21:46:28 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 24 Feb 2005 18:46:28 -0800
Subject: Default value for Listbox (Tkinter)
Message-ID: <1109299588.575892.244990@g14g2000cwa.googlegroups.com>

Whenever I set up something similar:

vals = ['1', '2','3']
for v in vals:
   listbox.inset(END, v)

I notice that when this listbox is displayed, there is never a default
value. How can I make sure that one of the indices is selected by
default?

Thanks,

Harlin



From bill.mill at gmail.com  Fri Feb  4 14:34:39 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Fri, 4 Feb 2005 14:34:39 -0500
Subject: string issue
In-Reply-To: <cu0i3o$jc6$1@solaris.cc.vt.edu>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
Message-ID: <797fe3d4050204113422f4d19c@mail.gmail.com>

On Fri, 04 Feb 2005 14:23:36 -0500, rbt <rbt at athop1.ath.vt.edu> wrote:
> Either I'm crazy and I'm missing the obvious here or there is something
> wrong with this code. Element 5 of this list says it doesn't contain the
> string 255, when that's *ALL* it contains... why would it think that???
> 
> import time
> 
> ips = ['255.255.255.255', '128.173.120.79', '198.82.247.98',
> '127.0.0.1', '255.0.0.0', '255', '128.173.255.34']
> 
> for ip in ips:
>      if '255' in ip:
>          try:
>              print "Removing", ip
>              ips.remove(ip)
>          except Exception, e:
>              print e
> 
> print ips
> time.sleep(5)
> 

You're gong crazy:

>>> ips = ['255.255.255.255', '128.173.120.79', '198.82.247.98',
... '127.0.0.1', '255.0.0.0', '255', '128.173.255.34']
>>> for ip in ips:
...     if '255' in ip: print ip
...
255.255.255.255
255.0.0.0
255
128.173.255.34

The problem is that you're operating in-place on an array while it's
being iterated over. Since the iterator is only created once, you're
can't change the array while you're iterating over it. Instead, try a
list comprehension:

>>> ips = [ip for ip in ips if '255' not in ip]
>>> ips
['128.173.120.79', '198.82.247.98', '127.0.0.1']

Peace
Bill Mill
bill.mill at gmail.com


From zoerhoff at ukato.freeshell.org  Thu Feb 10 13:02:11 2005
From: zoerhoff at ukato.freeshell.org (Kristian M Zoerhoff)
Date: Thu, 10 Feb 2005 18:02:11 +0000 (UTC)
Subject: [N00B] What's %?
References: <614c778e.0502100938.6665cb52@posting.google.com>
Message-ID: <slrnd0n8b7.du4.zoerhoff@ukato.freeshell.org>

In article <614c778e.0502100938.6665cb52 at posting.google.com>, administrata wrote:
> I don't understand about % like...
> 
> 107 % 4 = 3
> 7 % 3 = 1
> 

That's the modulo operation; it returns the remainder, rather than the quotient.

-- 
zoerhoff(AT)sdf.lonestar.org 
kristian.zoerhoff(AT)gmail.com


From deetsNOSPAM at web.de  Tue Feb 15 07:44:48 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Tue, 15 Feb 2005 13:44:48 +0100
Subject: replacing ASP/VBScript with Python
References: <cusnon$qhd$1@swifty.westend.com> <cusq6o$t30$1@swifty.westend.com>
Message-ID: <37e95mF5biov1U1@individual.net>

> Just noticed that this posting doesn't contain any questions. Here
> they are:
> 
> Any comments? Has anybody done something comparable successfully and
> give some advice?
> 
> Thanks in advance.

You did not really give much information of what your application does -
e.g. for a CMS, I'd strongly recommend a zope based solution. Other apps
might be better written in other frameworks.


-- 
Regards,

Diez B. Roggisch


From john_sips_teaz at yahooz.com  Thu Feb 24 00:56:23 2005
From: john_sips_teaz at yahooz.com (John M. Gabriele)
Date: Thu, 24 Feb 2005 00:56:23 -0500
Subject: Like overloading __init__(), but how?
References: <pan.2005.02.24.03.20.40.119047@yahooz.com>
	<n9udnV8BV5ZpxYDfRVn-vg@comcast.com>
Message-ID: <pan.2005.02.24.05.56.21.729399@yahooz.com>

On Wed, 23 Feb 2005 21:32:52 -0700, Steven Bethard wrote:

> [snip]
> Another possibility is to play around with *args:
> 
> class Vector3d(object):
>      def __init__(self, *args):
>          if not args:
>              # constructor with no arguments
>          elif len(args) == 6:
>              # constructor with xyz coords
>          elif len(args) == 2:
>              # constructor with points
>          elif len(args) == 1:
>              # copy constructor
>          else:
>              raise TypeError('expected 0, 1, 2 or 6 args, got %i' %
>                              len(args))
> 
> But this can get really ugly really quick.
> 
> HTH,
> 
> STeVe

Thanks STeVe. I think, for now, I'll probably stick with
the easier but less elegant way of checking *args. I guess
I could compare args[0].__class__.__name__  against 'Point3d',
'Vector3d', or just 'float'.

Didn't realize this topic came up recently. Sorry for the
duplication.

---J

-- 
--- if replying via email, remove zees ---




From john at grulic.org.ar  Thu Feb 17 14:49:11 2005
From: john at grulic.org.ar (John Lenton)
Date: Thu, 17 Feb 2005 16:49:11 -0300
Subject: How to wrap a class's methods?
In-Reply-To: <4214f167$0$44618$a1866201@visi.com>
References: <4214f167$0$44618$a1866201@visi.com>
Message-ID: <20050217194911.GF2366@grulic.org.ar>

On Thu, Feb 17, 2005 at 07:32:55PM +0000, Grant Edwards wrote:
> I want to subclass an IMAP connection so that most of the
> methods raise an exception if the returned status isn't 'OK'.
> This works, but there's got to be a way to do it that doesn't
> involve so much duplication:
> 
> class MyImap4_ssl(imaplib.IMAP4_SSL):
> 
>     def login(*args):
>         s,r = imaplib.IMAP4_SSL.login(*args)
>         if s!='OK':
>             raise NotOK((s,r))
>         return r
>         
>     def list(*args):
>         s,r = imaplib.IMAP4_SSL.list(*args)
>         if s!='OK':
>             raise NotOK((s,r))
>         return r
>         
>     def search(*args):
>         s,r = imaplib.IMAP4_SSL.search(*args)
>         if s!='OK':
>             raise NotOK((s,r))
>         return r
>         
>     [and so on for another dozen methods]
> 

something like this:

    def NotOKVerified(orig):
        def f(*args):
            s, r = orig(*args)
            if s != 'OK':
                raise NotOK((s,r))
            return r
        return f

    class MyImap4_ssl(IMAP4_SSL):
        pass

    for method_name in ('login', 'list', 'search'):
        setattr(MyImap4_ssl, method_name, getattr(IMAP4_SSL, method_name))

?

I'd usually put big fat warnings around this code, and explain exaclty
why I need to do things this way...

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
"To vacillate or not to vacillate, that is the question ... or is it?"
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From dodysw at gmail.com  Mon Feb  7 05:48:03 2005
From: dodysw at gmail.com (dody suria wijaya)
Date: Mon, 7 Feb 2005 17:48:03 +0700
Subject: Get importer module from imported module
Message-ID: <1377423714.20050207174803@asp.co.id>


I found this problem when trying to split a module into two.
Here's an example:

==============
#Module a (a.py):
from b import *
class Main: pass
==============

==============
#Module b (b.py)
def How():
    Main_instance = module_a.Main()
    return Main_instance
==============

> import a
> a.How()


the problem would show at How() function. I have been unable
to get variable pointing to module a from inside module b.
In short, I need to have a variable pointing to the module
whose importing me.


-- 
  dody s wijaya <dodysw at gmail.com>, YM: dody, [36932B53]



From mhartl at post.harvard.edu  Fri Feb 11 17:59:51 2005
From: mhartl at post.harvard.edu (Michael Hartl)
Date: 11 Feb 2005 14:59:51 -0800
Subject: check if object is number
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
	<374ho0F560ughU1@individual.net>
	<66WdnbJbuf5yj5DfRVn-iA@comcast.com>
	<1108155272.438423.177460@l41g2000cwc.googlegroups.com>
	<374lgtF57uvn2U1@individual.net>
Message-ID: <1108162791.677142.309490@g14g2000cwa.googlegroups.com>

Oops, my bad.  The utilities file I use gets loaded automatically when
I start my interpreter, so I mistook isnumber for a built-in function.
A battle-tested isnumber function is defined in Peter Norvig's utils.py
(http://aima.cs.berkeley.edu/python/utils.py):

#def isnumber(x):
#    "Is x a number? We say it is if it has an __int__ method."
#    return hasattr(x, '__int__')

Michael

--
Michael D. Hartl, Ph.D.
Chief Technology Officer
http://quarksports.com/



From fredrik at pythonware.com  Tue Feb 15 10:57:23 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 15 Feb 2005 16:57:23 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <mailman.2583.1108421758.22381.python-list@python.org>
	<cut5rq$o4d$1@usenet.otenet.gr>
Message-ID: <cut60d$4e4$1@sea.gmane.org>

Ilias Lazaridis wrote:

>> http://www.catb.org/~esr/faqs/smart-questions.html
>
> I know this document.
>
> It has no relevance to me.

QOTW! 





From tjreedy at udel.edu  Mon Feb 14 12:48:34 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 14 Feb 2005 12:48:34 -0500
Subject: ValueError: invalid literal for int(): 1.0000000000e+00
References: <4210D979.4000709@ribosome.natur.cuni.cz>
Message-ID: <cuqo51$e2t$1@sea.gmane.org>


"Martin MOKREJ?" <mmokrejs at ribosome.natur.cuni.cz> wrote in message 
news:4210D979.4000709 at ribosome.natur.cuni.cz...

int(somestring) without a radix argument requires that somestring be an 
decimal integer literal and nothing more and nothing else.

>>> int('1')
1
>>> int('1.0')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: invalid literal for int(): 1.0
>>> int('1x')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: invalid literal for int(): 1x

Terry J. Reedy





From exogen at gmail.com  Sat Feb 12 07:50:48 2005
From: exogen at gmail.com (Brian Beck)
Date: Sat, 12 Feb 2005 07:50:48 -0500
Subject: Iterate through dictionary of file objects and file names
In-Reply-To: <420deb18$1_1@news.iprimus.com.au>
References: <420deb18$1_1@news.iprimus.com.au>
Message-ID: <cuku8r$q5s$1@eeyore.INS.cwru.edu>

Julian Yap wrote:
> In this particular coding snippet, I was thinking of creating a 
> dictionary of file objects and file names.  These would be optional 
> files that I could open and parse.  At the end, I would easily close off 
> the files by iterating through the dictionary.

Hi,

File objects as keys sounds pretty dangerous. I'm curious why the first 
thought that popped into your head wasn't using the file NAMES as keys 
instead? Here's my go at it. (Is Google Groups nice to indentation using 
spaces? I can't remember.)

optionalFiles = dict.fromkeys(['areacode.11', 'build.11'], None)

# To open optionalFiles...
for fileName in optionalFiles:
     try:
         optionalFiles[fileName] = open(fileName, "r")
         print "Opened: %s" % fileName
     except IOError:
         # Values are already initialized to None.
         print "File not found: %s" % fileName

# To close optionalFiles...
for fileName, fileObject in optionalFiles.iteritems():
     if fileObject:
         fileObject.close()
         print "Closed: %s" % fileName
         # Rebinding fileObject here won't modify the dictionary,
         # so access it through the key.
         optionalFiles[fileName] = None


--
Brian Beck
Adventurer of the First Order


From erikbethke at gmail.com  Wed Feb  9 07:56:04 2005
From: erikbethke at gmail.com (Erik  Bethke)
Date: 9 Feb 2005 04:56:04 -0800
Subject: Trouble with the encoding of os.getcwd() in Korean Windows
Message-ID: <1107953764.478501.176650@c13g2000cwb.googlegroups.com>

Hello All,

I have found much help in the google archives but I am still stuck...

here is my code snippet:
	path = os.getcwd()
        path = path.decode('UTF8')

Now the trouble is I am getting that darn UnicodeDecodeError, where it
is tripping up on the Korean hangul for My Desktop.  Now I have tried
utf8 and utf16 and neither of these works.

So is this my question?:  What encoding does windows use for Korean
Windows?  I thought it might be and so I surfed around
(http://foundationstone.com.au/HtmlSupport/OnlineHelp/Localisation/SupportedEncodings.html)
and there appears to be an encoding called: windows-949 labeled to be
Korean Windows, which of couse is *not* one of the encodings to be
found in the encodings package... which would suck.

But then I thought about it some more, how could you make software to
do things like read the current directory work on different language
machines???  It would be madness to have a try statement for each and
every encoding under the sun...

Why isn't there a get system encoding method?

Or am I on the entirely wrong track?

Thanks,
-Erik



From francis.girard at free.fr  Wed Feb  9 14:55:51 2005
From: francis.girard at free.fr (Francis Girard)
Date: Wed, 9 Feb 2005 20:55:51 +0100
Subject: convert list of tuples into several lists
In-Reply-To: <36uihlF58p63iU1@individual.net>
References: <cud40u$vqb$01$1@news.t-online.com>
	<36uihlF58p63iU1@individual.net>
Message-ID: <200502092055.52045.francis.girard@free.fr>

Le mercredi 9 F?vrier 2005 14:46, Diez B. Roggisch a ?crit?:
> zip(*[(1,4),(2,5),(3,6)])
>
> --
> Regards,
>
> Diez B. Roggisch

That's incredibly clever! I would had never thought to use "zip" to do this ! 
I would had only think to use it for the contrary, i.e.

>>> zip([1,2,3], [4,5,6])
[(1, 4), (2, 5), (3, 6)]

Notice though that the solution doesn't yield the exact contrary as we end up 
with a list of tuples instead of a list of lists :

>>> zip(*[(1,4),(2,5),(3,6)])
[(1, 2, 3), (4, 5, 6)]

But this can be easily fix if lists are really wanted :

>>> map(list, zip(*[(1,4),(2,5),(3,6)]))
[[1, 2, 3], [4, 5, 6]]


Anyway, I find Diez solution brillant ! I'm always amazed to see how skilled a 
programmer can get when comes the time to find a short and sweet solution.

One can admire that zip(*zip(*a_list_of_tuples)) == a_list_of_tuples

Thank you
You gave me much to enjoy

Francis girard




From nick at craig-wood.com  Thu Feb 10 05:30:02 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 10 Feb 2005 10:30:02 GMT
Subject: probably weird or stupid newbie dictionary question
References: <1107962661.011759.30100@f14g2000cwb.googlegroups.com>
	<36up5bF564mc5U1@individual.net>
Message-ID: <slrnd0mdqm.kvs.nick@irishsea.home.craig-wood.com>

Diez B. Roggisch <deetsNOSPAM at web.de> wrote:
>  But what happens in case of a hash code clash? Then a list of (key, values)
>  is stored, and for a passed key, each key in that list is additionally
>  compared for being equal to the passed one. So another requirement of
>  hashable objecst is the comparability. In java, this is done using the
>  equals method.
> 
>  So in the end, the actual mapping of key, value looks like this:
> 
>  hash(key) -> [(key, value), ....]

Thats called hashing with chaining.

See Knuth: Sorting and Searching if you want to know more!

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


From jdadson at yahoo.com  Wed Feb  9 00:49:34 2005
From: jdadson at yahoo.com (Jive Dadson)
Date: Wed, 09 Feb 2005 05:49:34 GMT
Subject: Name of type of object
Message-ID: <4209A52C.A1C40311@yahoo.com>

The traceback routine prints out stuff like,

	NameError: global name 'foo' is not defined

NameError is a standard exception type.

What if I want to print out something like that?
I've determined that "global name 'foo' is not defined" comes 
from the __str__ member of the exception object.
Where does it find the string "NameError"?  In general, if I have 
an object, is there a way to obtain the name of the type of the object?

Thankee.


From ktm-void at altern.org  Mon Feb 14 15:25:21 2005
From: ktm-void at altern.org (Ktm)
Date: Mon, 14 Feb 2005 21:25:21 +0100
Subject: pb ssl  + select
Message-ID: <cur1hp$27u$1@apollon.grec.isp.9tel.net>

Hi,

the following code (just taken on the example) blocks on recv unless I 
uncomment the 'send' function. I tested it with stunnel. Select seems to 
tell that there is something to read whereas there is nothing. Moreover 
why does it block since I am in non blocking mode ?


-----

from OpenSSL import SSL
import sys, os, select, socket


def verify_cb(conn, cert, errnum, depth, ok):
   # This obviously has to be updated
   print 'Got certificate: %s' % cert.get_subject()
   return ok

if len(sys.argv) < 2:
   print 'Usage: python[2] server.py PORT'
   sys.exit(1)

dir = os.path.dirname(sys.argv[0])
if dir == '':
   dir = os.curdir

# Initialize context
ctx = SSL.Context(SSL.SSLv23_METHOD)
ctx.set_options(SSL.OP_NO_SSLv2)
ctx.set_verify(SSL.VERIFY_NONE, verify_cb) # Demand a certificate
ctx.use_privatekey_file (os.path.join(dir, 'cert/server.pkey'))
ctx.use_certificate_file(os.path.join(dir, 'cert/server.cert'))
ctx.load_verify_locations(os.path.join(dir, 'cert/CA.cert'))

# Set up server
server = SSL.Connection(ctx, socket.socket(socket.AF_INET, 
socket.SOCK_STREAM))
server.bind(('', int(sys.argv[1])))
server.listen(3)
server.setblocking(0)

clients = {}
writers = {}

def dropClient(cli, errors=None):
   if errors:
       print 'Client %s left unexpectedly:' % (clients[cli],)
       print '  ', errors
   else:
       print 'Client %s left politely' % (clients[cli],)
   del clients[cli]
   if writers.has_key(cli):
       del writers[cli]
   if not errors:
       cli.shutdown()
   cli.close()
__cli = None
while 1:
   print 'select'
   try:
       r,w,_ = select.select([server]+clients.keys(), writers.keys(), 
[], 1)          except:
       break
   print '[ OK ]'
   for cli in r:
       if cli == server:
           cli,addr = server.accept()
           __cli = cli
           print 'Connection from %s' % (addr,)
           clients[cli] = addr

       else:
           try:
               print 'recv...'
               ######## we block here ###########
               ret = cli.recv(1024)
               print '[ OK ]'
           except (SSL.WantReadError, SSL.WantWriteError, 
SSL.WantX509LookupError):
               pass
           except SSL.ZeroReturnError:
               dropClient(cli)
           except SSL.Error, errors:
               dropClient(cli, errors)
           else:
               if not writers.has_key(cli):
                   writers[cli] = ''
               writers[cli] = writers[cli] + ret
   # if we decomment this it is ok
   ###if __cli:
       ###print 'send'
       ###__cli.send('test\n')              ###print '[ OK ]'
         for cli in w:
       try:
           ret = cli.send(writers[cli])
       except (SSL.WantReadError, SSL.WantWriteError, 
SSL.WantX509LookupError):
           pass
       except SSL.ZeroReturnError:
           dropClient(cli)
       except SSL.Error, errors:
           dropClient(cli, errors)
       else:
           writers[cli] = writers[cli][ret:]
           if writers[cli] == '':
               del writers[cli]

for cli in clients.keys():
   cli.close()
server.close()




From jgrahn-nntq at algonet.se  Tue Feb  1 15:31:10 2005
From: jgrahn-nntq at algonet.se (Jorgen Grahn)
Date: 1 Feb 2005 20:31:10 GMT
Subject: Suggesion for an undergrad final year project in Python
References: <1107241918.722156.123590@c13g2000cwb.googlegroups.com>
Message-ID: <slrncvvpl9.rr5.jgrahn-nntq@frailea.sa.invalid>

On 31 Jan 2005 23:11:58 -0800, Sridhar <sridharinfinity at gmail.com> wrote:
> Hi,
> 
> I am doing my undergrade CS course.  I am in the final year, and would
> like to do my project involving Python.  Our instructors require the
> project to have novel ideas.  Can the c.l.p people shed light on this
> topic?

Seems to me you should find this novel idea and /then/ find the tools to
implement it. Hopefully Python would be one such good tool.

I don't have novel ideas anymore, so I can't help ...

The type interference engine for Python they talk about in some other
threads here would be a cool and useful, and "hard CS", project, but I
suspect it's too big a task. And it has been done for SML and other
languages so I don't know if it's strictly "novel".

/Jorgen

-- 
  // Jorgen Grahn <jgrahn@       Ph'nglui mglw'nafh Cthulhu
\X/                algonet.se>   R'lyeh wgah'nagl fhtagn!


From onurb at xiludom.gro  Fri Feb 11 05:05:28 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Fri, 11 Feb 2005 11:05:28 +0100
Subject: [perl-python] combinatorics fun
In-Reply-To: <cuh4fq$p2l$1@news.xmission.com>
References: <1108075884.250995.62520@g14g2000cwa.googlegroups.com>
	<cuh4fq$p2l$1@news.xmission.com>
Message-ID: <420c836e$0$19204$626a14ce@news.free.fr>

YYUsenet wrote:
> Xah Lee wrote:
> 
(snip insanities)
>>
> 
> Why are you posting this to comp.lang.python? This obviously has nothing 
> to do with python at all.  If you are trying to teach people python, 
> claiming that "...let's do a python version. I'll post my version later 
> today."  Isn't really the proper way to do it.  An even better method 
> would be to set up a website dedicated to nothing but it, and stop 
> posting here with garbage code that no one wants to read, and that helps 
> no one.  Please, consider others a little bit when you go off on your 
> wild hope that you might be able to teach other people what you 
> obviously know nothing about, teaching people from a language that you 
> know nothing about.   *PLEASE STOP POSTING*!! *NOBODY WANTS YOU TO POST*!!
> 

The guy is an obvious, well-known and self-proclaimed troll. Dont feed 
the troll.

-- 
bruno desthuilliers
ruby -e "print 'onurb at xiludom.gro'.split('@').collect{|p| 
p.split('.').collect{|w| w.reverse}.join('.')}.join('@')"
--


From davidf at sjsoft.com  Fri Feb 18 04:32:49 2005
From: davidf at sjsoft.com (David Fraser)
Date: Fri, 18 Feb 2005 11:32:49 +0200
Subject: [EVALUATION] - E02 - ULTIMATE RECIPE TO RESOLVE ALL ISSUES
In-Reply-To: <oTF1JdVCdOFCFwep@objmedia.demon.co.uk>
References: <cuo71l$gig$1@usenet.otenet.gr> <cuv1st$6um$1@swifty.westend.com>
	<cv2m54$hnf$1@usenet.otenet.gr>
	<oTF1JdVCdOFCFwep@objmedia.demon.co.uk>
Message-ID: <cv4bjd$m15$1@ctb-nnrp2.saix.net>

Stephen Kellett wrote:
> In message <cv2m54$hnf$1 at usenet.otenet.gr>, Ilias Lazaridis 
> <ilias at lazaridis.com> writes
> 
>> This thread proofs simply the inability of this community [1] to focus 
>> on a simple essence.
> 
> 
> Incorrect analysis. This thread proves that you have no concept of how 
> to interact with the community. If you had done what many people asked 
> you to do, which is do some work yourself, then ask questions about the 
> few answers you didn't discover yourself, you would have got lots of 
> helpful answers. You were told this many times by many people. Also on 
> the odd occasion someone did proffer some on-topic advice, sometimes in 
> long articles that must have taken some time to produce you'd dismiss 
> the article with "It is not on topic, I have not read it". How could you 
> know if it is not on topic if you don't read it? Apart from the gross 
> rudeness in such an attitude it demonstrates your arrogance, selfishness 
> and utter contempt for those replying to you.
> 
> And then you have the gall to blame your failure on others...
> 
> Next you'll be telling me the world is flat and held up by an infinite 
> array of tortoises.

Actually I suspect Ilias is trying to carry out his own sort of 'survey' 
on how various communities respond to questions asked in the kind of way 
he asked them ... See his web site.

David


From sxanth at ceid.upatras.gr  Thu Feb 10 22:37:03 2005
From: sxanth at ceid.upatras.gr (Stelios Xanthakis)
Date: Thu, 10 Feb 2005 19:37:03 -0800
Subject: Big development in the GUI realm
In-Reply-To: <1grnxs8.1y1tcqq1d0o2bsN%aleaxit@yahoo.com>
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<cu8h8k$md4$1@sea.gmane.org> <4207D64F.2000709@optushome.com.au>
	<mailman.2118.1107818151.22381.python-list@python.org>
	<mailman.2123.1107820051.22381.python-list@python.org>
	<4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com>
	<cu95nd$7cr$1@news1.ucsd.edu>
	<6h7g0113up1v76k7qkad7bt17os1q73510@4ax.com>
	<mailman.2135.1107829480.22381.python-list@python.org>
	<e0ag011atnlt5b00klicjol93c7j8fe341@4ax.com>
	<c1rg0110sqmiqm28ka301bj9a506rdfoqt@4ax.com>
	<1grnxs8.1y1tcqq1d0o2bsN%aleaxit@yahoo.com>
Message-ID: <420C285F.3060004@ceid.upatras.gr>

Alex Martelli wrote:

> Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
> 
> 
>>hassle to code, but if your application could dynamically select from
>>whatever toolkit is available on the machine, you (and I should emphasis
>>that this is an impersonal/generic "you" I reference) might be able to
>>argue an exemption from the QT license.
> 
> 
> So maybe it's time to resurrect anygui, maybe in a simplified version
> which can only interface to, say, PyQt or Tkinter -- 'eithergui' maybe.
> 
> 
> Alex

Done already: 'Twilight GUI'!

http://students.ceid.upatras.gr/~sxanth/twgui/


However, it's very furstrating working on 4 toolkits in parallel
and because some of the don't have good documentation, I'm doing
other things right now:)


Stelios



From dan.eloff at gmail.com  Wed Feb 23 23:05:48 2005
From: dan.eloff at gmail.com (Dan Eloff)
Date: Wed, 23 Feb 2005 20:05:48 -0800
Subject: How Do I get Know What Attributes/Functions In A Class?
References: <1108870842.095282.54200@z14g2000cwz.googlegroups.com>
	<d1c02$42182841$a228dd19$19743@ispnews.usenetserver.com>
	<4219d002$1_2@newspeer2.tds.net>
	<1109217373.209741.149690@g14g2000cwa.googlegroups.com>
Message-ID: <opsmoobywucq4h53@rr-22.mshome.net>

Use the dir() function

dir(myClass)

returns a list of strings

-Dan




From john at grulic.org.ar  Fri Feb 18 18:54:48 2005
From: john at grulic.org.ar (John Lenton)
Date: Fri, 18 Feb 2005 20:54:48 -0300
Subject: exercise: partition a list by equivalence
In-Reply-To: <1108768870.455974.244590@c13g2000cwb.googlegroups.com>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<mailman.2803.1108743668.22381.python-list@python.org>
	<1108768870.455974.244590@c13g2000cwb.googlegroups.com>
Message-ID: <20050218235448.GA6719@grulic.org.ar>

On Fri, Feb 18, 2005 at 03:21:10PM -0800, John Machin wrote:
> Not robust in the face of input like:
> [[1,1]]
> or
> [[1,2], [1,2]]
> or
> [[1,2], [2,1]]
> or
> [[1,2], [2,3], [3,1]]

oops, my bad.

> 
> needs "if first == second: continue" here
> 
> >             if has_first and has_second:
> 
> needs "if rev[first] == rev[second]: continue" here

an 'is' is enough, and better.

> >                 rev[first].extend(rev[second])
> >                 rev[second][:] = []
> >                 rev[second] = rev[first]
> >             elif has_first:
> >                 rev[first].append(second)
> >                 rev[second] = rev[first]
> >             elif has_second:
> >                 rev[second].append(first)
> >                 rev[first] = rev[second]
> >             else:
> >                 copy = [first, second]
> >                 res.append(copy)
> 
> My reaction to the "magic" by which res grows was "omigod that's the
> most horrible thing I've seen for quite a while" but there was worse to
> come :-)

what is magic about it? is it really that horrible?

> List appending is O(1) only in the amortised sense. Extending is not
> O(1) in any sense. Neither is the list comparison that is necessary for
> robustness (using your data structure, that is).
> 
> You don't need to think. This problem has been extensively picked over
> by folk who are a lot smarter than us, starting from 30 years ago.
> Google for "disjoint set" and "union-find". One gets the impression
> that the best possible algorithm would be slightly *worse* than O(n).

Of course! I'd forgotten clean about union-find. And yes, it's
O(n*log(n)) union and find, and my implementation is O(n**2) for
union, O(1) for find; I'm pleased that, in spite of having forgotten
about union-find, I "reinvented" (heh) something that is better than
the "naive" implementation we saw in class.

Now I'm even more worried about your dismissal of this as magic and
horrible.

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
Why don't you fix your little problem... and light this candle?
		-- Alan Shepherd, the first man into space, Gemini program
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From anthony at python.org  Wed Feb  9 02:27:49 2005
From: anthony at python.org (Anthony Baxter)
Date: Wed, 9 Feb 2005 18:27:49 +1100
Subject: RELEASED Python 2.3.5, final
Message-ID: <200502091827.56277.anthony@python.org>


On behalf of the Python development team and the Python community, I'm
happy to announce the release of Python 2.3.5 (final).

Python 2.3.5 is a bug-fix release. See the release notes at the website
(also available as Misc/NEWS in the source distribution) for details of
the bugs squished in this release.

Python 2.3.5 contains an important security fix for SimpleXMLRPCServer -
for more, see the announcement of PSF-2005-001 at:

    http://www.python.org/security/PSF-2005-001/ 

Python 2.3.5 is the last planned release in the Python 2.3 series, and
is being released for those people who still need to run Python 2.3.
Python 2.4 is a newer release, and should be preferred if possible. From
here, bugfix releases are switching to the Python 2.4 branch - 2.4.1
will be the next Python release.

For more information on Python 2.3.5, including download links for
various platforms, release notes, and known issues, please see:

    http://www.python.org/2.3.5

Highlights of this new release include:

  - Bug fixes. According to the release notes, more than 50 bugs 
    have been fixed, including a couple of bugs that could cause 
    Python to crash. 

Highlights of the previous major Python release (2.3) are available     
from the Python 2.3 page, at                                            

    http://www.python.org/2.3/highlights.html

Enjoy the new release,
Anthony

Anthony Baxter
anthony at python.org
Python Release Manager
(on behalf of the entire python-dev team)
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From martin at v.loewis.de  Wed Feb 23 17:10:29 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 23 Feb 2005 23:10:29 +0100
Subject: LC_ALL and os.listdir()
In-Reply-To: <cvitch$111q$1@news.comcor-tv.ru>
References: <mailman.2959.1109142240.22381.python-list@python.org>
	<421cf088$0$8788$9b622d9e@news.freenet.de>
	<cvitch$111q$1@news.comcor-tv.ru>
Message-ID: <421cff55$0$16589$9b622d9e@news.freenet.de>

Serge Orlov wrote:
> Shouldn't os.path.join do that? If you pass a unicode string
> and a byte string it currently tries to convert bytes to characters
> but it makes more sense to convert the unicode string to bytes
> and return two byte strings concatenated.

Sounds reasonable. OTOH, this would be the only (one of a very
few?) occasion where Python combines byte+unicode => byte.
Furthermore, it might be that the conversion of the Unicode
string to a file name fails as well.

That said, I still think it is a good idea, so contributions
are welcome.

Regards,
Martin


From jerf at jerf.org  Thu Feb  3 14:28:31 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 03 Feb 2005 14:28:31 -0500
Subject: Calling a method using an argument
References: <ctth3v$o2r$1@ucsnew1.ncl.ac.uk>
Message-ID: <pan.2005.02.03.19.28.31.341663@jerf.org>

On Thu, 03 Feb 2005 15:48:05 +0000, C Gillespie wrote:

> Dear All,
> 
> I have a simple class
> class hello:
>     def world(self):
>         return 'hello'
>     def test(self,arg):
>         return self.arg
> 
> When I want to do is:
>>hello.test('world')
> 'hello'
> 
> i.e. pass the method name as an argument. How should I do this?

In addition to Diez's point, I'd also point out you can do that from
outside the class:

Python 2.3.4 (#1, Jan 25 2005, 21:29:33) 
[GCC 3.4.3  (Gentoo Linux 3.4.3, ssp-3.4.3-0, pie-8.7.6.6)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> class Simple:
...     def hello(self):        
...             print "hello"
... 
>>> s = Simple()
>>> getattr(s, "hello")()
hello
>>> 

which may be more useful depending on what you are doing. I mention this
because you are essentially re-implementing 'getattr' as a method of your
object and it is likely you don't *really* want to do that, but I don't
know, since we don't know what you are doing with this.


From paolo_veronelli at yahoo.it  Fri Feb 18 11:28:40 2005
From: paolo_veronelli at yahoo.it (paolo_veronelli)
Date: Fri, 18 Feb 2005 16:28:40 +0000
Subject: interface  like behavior for mudules
Message-ID: <421617B8.4050204@yahoo.it>

Hello  pyple,

I have two modules :remote.py  and local.py which have some classes with 
the same names specifically one we can call Model.So it exist 
remote.Model class and local.Model class

A third module called uri.py  derives some of its classes from a not 
better specified repository.Model

at the beginning of uri.py I can write 'import local as repository' or 
'import remote as repository'. In either cases the module uri is ready 
to be imported from a fourth module

Now I have two applications ,say applocal.py and appremote.py. Both 
import uri as a module ,but the first wants uri to have imported local 
as repository and the second wants uri to have imported remote as 
repository.

In pseudo language applocal.py would have 'import uri with local as 
repository'  at the beginning and appremote.py would have 'import uri 
with remote as repository'

I wonder if there is a way to keep uri unique,because as it is now I 
have to keep two modules,say urilocal and uriremote which differs only 
for a line at the top.

I suppose __import__ is there to help me, but I have no idea on how.

Hope I have been clear,thanks for considerations and help

Yours Paolino



From oliver.eichler at dspsolutions.de  Thu Feb 10 04:35:03 2005
From: oliver.eichler at dspsolutions.de (Oliver Eichler)
Date: Thu, 10 Feb 2005 10:35:03 +0100
Subject: convert list of tuples into several lists
References: <cud40u$vqb$01$1@news.t-online.com>
	<36uihlF58p63iU1@individual.net>
	<cudcad$2bu$03$1@news.t-online.com>
	<420a37fd$0$12847$626a14ce@news.free.fr>
Message-ID: <cuf9s7$hn2$00$1@news.t-online.com>

Pierre Barbier de Reuille wrote:
> 
> Best answer is : try it :)
> use the "timeit" module (in the standard lib) to do so ...

Ok, (a second time. I hope the first post was cancelled as it was false)

import timeit

s = """\
a,b,c1,c2 = zip(*[(x[2],x[4], x[2]-x[1], x[2] - x[3]) for x in z])
"""

t = timeit.Timer(stmt=s,setup="z = [(1,2,3,4,5)]*1000")
print "%.2f usec/pass" % (1000000 * t.timeit(number=100000)/100000)

s ="""\
a = []
b = []
c1 = []
c2 = []
for x in z:
  a.append(x[2])
  b.append(x[4])
  c1.append(x[2] - x[1])
  c2.append(x[2] - x[3])
"""

t = timeit.Timer(stmt=s,setup="z = [(1,2,3,4,5)]*1000")
print "%.2f usec/pass" % (1000000 * t.timeit(number=100000)/100000)

for 100 elements:
oeichler at frog:~/tmp> python test.py
104.67 usec/pass
180.19 usec/pass

for 1000 elements:
oeichler at frog:~/tmp> python test.py
1432.06 usec/pass
1768.58 usec/pass


What do we learn? The zip-thingy is even faster than the for loop

Learned my lesson :)

Thanks to all

Oliver



From jcribbs at twmi.rr.com  Wed Feb 16 21:37:57 2005
From: jcribbs at twmi.rr.com (Jamey Cribbs)
Date: Thu, 17 Feb 2005 02:37:57 GMT
Subject: low-end persistence strategies?
In-Reply-To: <7xbrakjeu1.fsf@ruckus.brouhaha.com>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<Xns95FFF321AD909PaCmAnRDLM@212.27.42.70>
	<7xbrakjeu1.fsf@ruckus.brouhaha.com>
Message-ID: <9sTQd.33120$XY5.31311@fe2.columbus.rr.com>

Paul Rubin wrote:
> Fred Pacquier <xnews2 at fredp.lautre.net> writes:
> 
>>KirbyBase sounds like something that could fit the bill.
> 
> 
> Hmm, this looks kind of nice.  However, when used in embedded mode,
> the overview blurb doesn't say anything about concurrency control.
> I don't want to use it in client/server mode, for reasons already stated.

The KirbyBase distribution comes with two small scripts that each 
implement a server.

kbsimpleserver.py allows multi-user access to KirbyBase tables.  It 
takes care of concurrent update issues by being single-threaded and 
blocking.  Client requests are handled sequentially.  It works fine for 
small tables that don't have a lot of concurrent access.

kbthreadedserver.py also allows for multi-user access.  It creates a 
multi-threaded, non-blocking server.  Each client gets it's own thread. 
    The only time one thread will block the others is when it is going 
to write to a table, and then it only blocks other write requests to 
that same table.  Reads never are blocked.  This server script has 
worked ok for me in limited testing.

Either of these server scripts would have to be running as a process 
either on your web server or on another server on your network in order 
for them to work.  I don't know if that would be an issue for you.

HTH,

Jamey Cribbs


From tom.willis at gmail.com  Wed Feb 23 16:40:52 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Wed, 23 Feb 2005 16:40:52 -0500
Subject: Dealing with config files what's the options
In-Reply-To: <87oeebvxqk.fsf@outershell.co.uk>
References: <b54d0489050222173810d9ac75@mail.gmail.com>
	<87oeebvxqk.fsf@outershell.co.uk>
Message-ID: <b54d0489050223134014d4a23a@mail.gmail.com>

On Wed, 23 Feb 2005 20:15:47 +0000, Phil Jackson
<python-list at outershell.co.uk> wrote:
> Tom Willis <tom.willis at gmail.com> writes:
> 
> > How are the expert pythoneers dealing with config files?
> 
> You could use the cPickle module if you don't mind your config files
> being unreadable by humans. There is also the shlex module for more
> powerful config file needs:
> 
> http://docs.python.org/lib/module-shlex.html
> 
> While I'm replying to you, would you mind if I take the opportunity to
> ask you to stop top-posting?
> 
> Thanks,
> 
> Phil
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

<sigh>


I guess. 

It's just so inconvenient in gmail. 

But anything for you. I'll try to try. :)


Thanks for the info.

-- 
Thomas G. Willis
http://paperbackmusic.net


From abkhd at earth.co.jp  Fri Feb 18 17:49:00 2005
From: abkhd at earth.co.jp (A.B., Khalid)
Date: 18 Feb 2005 14:49:00 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>
	<1108411893.940158.270090@c13g2000cwb.googlegroups.com>
	<42163065.8070708@lazaridis.com>
	<mailman.2815.1108754385.22381.python-list@python.org>
	<cv5fnc$ll9$1@usenet.otenet.gr>
Message-ID: <1108766939.959180.273760@z14g2000cwz.googlegroups.com>

Ilias Lazaridis wrote:
> The first step is to make a pyMinGW project.
>

You are mistaken. The first steps are the following:

1) Realizing that a project _must_ start not because you want it to,
but because those who are willing to work on it think it is worth the
extra effort for it to.

2) Realizing that what best scratches your back is non other than your
own nails. No one is going to do any extra effort for you (or anyone
else for that matter) if they have some good reason not to. And both
the author of pyMinGW and Tim have already given enough reasons for
those who wondered why there is no official Python support for the
MinGW compiler earlier in this very thread.

3) Realizing that there _is_ already a project called pyMinGW! That it
does not fit your requirements-- whatever these maybe-- is an
altogether different issue. The fact of the matter remains that a
project _does_ exist, one which people (including myself) do in fact
use; and because it does exist there is no reason to "make" it.


> If one is intrested, he has possibly more luck [than I had] to
convince
> the author of pyMinGW.

Of what? To make pyMinGW? To do extra work to your liking that was
shown to be nnnecessary especially when pyMinGW can currently get the
job done? Let alone the free compiler available for all to use?

Whether you realize it or not, those who are interested will download
pyMinGW and will test it and they will use it if they find it useful.
It is their choice to do so. It is apparent that not only have you not
done that, but that you also seem not interested in doing so. That too
is your choice. I suspect that no one is going to lose sleep over
either choice. I hope I don't come across as condescending, which I
hope I never am, but I know I won't. Life goes on.


Khalid



--
pyMinGW:
http://jove.prohosting.com/iwave/ipython/pyMinGW.html



From erikbethke at gmail.com  Tue Feb  8 11:32:17 2005
From: erikbethke at gmail.com (Erik  Bethke)
Date: 8 Feb 2005 08:32:17 -0800
Subject: Effbot's SimpleXMLWriter fails when py2exe'd
Message-ID: <1107880337.524216.180440@g14g2000cwa.googlegroups.com>

Hello All,

So I have been using Effbot's XML stuff a lot!  And I have been using
py2exe, pygame and wxPython all mixed together...

I am getting this strange error log when writing XML files with his XML
writer.  It appears to be fouling up on the encoding, ONLY in the exe
version.  Runs fine and great as a python script.

What this does is leave the file hanging open...

I could write out the XML myself, but I would rather use his class...
any ideas why it broke?

Thank you,
-Erik

code snippet:
def SaveVocabTree( self ):
    ElementTree( self.vocabXMLTree ).write(self.currentPath,
encoding='utf-8')

error log:
Traceback (most recent call last):
  File "vocab.py", line 457, in OnAdd
  File "vocab.py", line 483, in AddWord
  File "vocab.py", line 494, in SaveVocabTree
  File "elementtree\ElementTree.pyc", line 666, in write
  File "elementtree\ElementTree.pyc", line 684, in _write
  File "elementtree\ElementTree.pyc", line 754, in _encode
LookupError: unknown encoding: utf-8



From rbt at athop1.ath.vt.edu  Fri Feb  4 14:23:36 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Fri, 04 Feb 2005 14:23:36 -0500
Subject: string issue
Message-ID: <cu0i3o$jc6$1@solaris.cc.vt.edu>

Either I'm crazy and I'm missing the obvious here or there is something 
wrong with this code. Element 5 of this list says it doesn't contain the 
string 255, when that's *ALL* it contains... why would it think that???

import time

ips = ['255.255.255.255', '128.173.120.79', '198.82.247.98', 
'127.0.0.1', '255.0.0.0', '255', '128.173.255.34']

for ip in ips:
     if '255' in ip:
         try:
             print "Removing", ip
             ips.remove(ip)
         except Exception, e:
             print e

print ips
time.sleep(5)

Someone tell me I'm going crazy ;)


From peter at engcorp.com  Wed Feb 16 20:42:20 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 16 Feb 2005 20:42:20 -0500
Subject: web spider and password protected pages
In-Reply-To: <1108604043.434727.266180@f14g2000cwb.googlegroups.com>
References: <1108580601.884193.263890@g14g2000cwa.googlegroups.com>
	<_LudnUg0vJIsLI7fRVn-rA@powergate.ca>
	<1108592930.373112.90560@c13g2000cwb.googlegroups.com>
	<RbCdnaiwxvdCb47fRVn-qg@powergate.ca>
	<1108604043.434727.266180@f14g2000cwb.googlegroups.com>
Message-ID: <jOCdnY7u558ta47fRVn-3w@powergate.ca>

jdonnell wrote:
> "Nevertheless, perhaps you'll still post the answer here so
> that others who come along later can benefit from your
> experience in the same way that you benefited from reading
> whatever page you found (even if you didn't benefit from
> my suggestions...). "
> 
> Your funny :) Perhaps you should take your own advice. My guess is that
> the google search you described will return different results in a few
> months. Your first post won't benefit those who "come along later".

Sure it will, for those with the wits to understand that I
was trying to show someone how he can *search* for the
information himself, rather than having to beg for others
to do his work for his.  Whatever results Google shows in
a few months is irrelevant... it's the technique that mattered.

If there'd been the slightest sign that you'd actually tried
to find the answer yourself before you asked, your criticism
would be far more effective.

-Peter


From beefens_skasuj_ at o2.pl  Wed Feb  2 07:29:41 2005
From: beefens_skasuj_ at o2.pl (Pawe³ Chrobak)
Date: Wed, 2 Feb 2005 13:29:41 +0100
Subject: access to serial port
Message-ID: <ctqh3j$nj$1@news.onet.pl>

Hi

How to take access to serial port (rs232) ??
Is't possible??  Just tell me guy's where I can take o look
Now I work under Windows XP but finally I need to make script to communicate 
witch
GSM modem under Linux. There will be a typical AT commands

Thanks 




From __peter__ at web.de  Sat Feb  5 09:28:05 2005
From: __peter__ at web.de (Peter Otten)
Date: Sat, 05 Feb 2005 15:28:05 +0100
Subject: variable declaration
References: <ctkp0b$ktu$00$1@news.t-online.com>
	<MSGID_2=3A5025=2F3.131_4204cc14@fidonet.org>
Message-ID: <cu2l5t$cf9$01$1@news.t-online.com>

Alexander Zatvornitskiy wrote:

> ?????? Peter!
> 
> 31 ?????? 2005 ? 09:09, Peter Otten ? ????? ?????? ? All ?????:
>  PO> pychecker may help you find misspelled variable names. You have to
>  PO> move the code into a function, though:
> 
>  PO> $ cat epsilon.py
> ...skipped...
>  PO> $ pychecker epsilon.py
>  PO> epsilon.py:6: Local variable (epselon) not used
> 
> Well, I can change it a little to pass this check. Just add "print
> epselon" line.

You are now on a slippery slope. I'd rather think of ways to write my code
in a way for it to succeed or at least fail in an obvious way. I don't
consider a scenario likely where you both misspell a name nearly as often
as you write it correctly, and do that in a situation where the program
enters an infinite loop instead of just complaining with an exception,
which is by far the most likely reaction to a misspelt name.

> I think if as soon as I will make such error, I will write special
> checker. It will take code like this:
> 
> def loop():
>     #var S,epsilon
>     epsilon=0
>     S=0
>     while epsilon<10:
>         S=S+epsilon
>         epselon=epsilon+1
>         print S

Code not written is always errorfree, and in that spirit I'd rather strive
to write the function more concisely as

def loop2():
    s = 0
    for delta in range(10):
        s += delta
        print s

This illustrates another problem with your approach: would you have to
declare globals/builtins like range(), too?

> Such checker will say "error:epselon is not declared!" if I will use
> something not declared. If everything is ok, it will call pychecker.
> Simple and tasty, isn't it?

That your program compiles in a somewhat stricter environment doesn't mean
that it works correctly.

> Of cource, it may be difficult to handle fields of classes:
> MyClass.epsElon=MyClass.epsilon+1

MyClass.epsilon += 1

reduces the risk of a spelling error by 50 percent. I doubt that variable
declarations reduce the likelihood of erroneous infinite loops by even 5
percent.

> but it is solvable, I think. What do you think, is it a good idea?
 
I suggested pychecker more as a psychological bridge while you gain trust in
the Python way of ensuring reliable programs, i. e. writing small and
readable functions/classes that do one thing well and can easily be tested. 
Administrative overhead -- as well as excessive comments -- only serve to
bury what is actually going on. 

I guess that means no, not a good idea.

On the other hand, taking all names used in a function and looking for
similar ones, e. g. by calculating the Levenshtein distance, might be
worthwhile...

Peter




From jb_perin at yahoo.fr  Tue Feb  8 05:53:12 2005
From: jb_perin at yahoo.fr (Jean-Baptiste PERIN)
Date: Tue, 08 Feb 2005 11:53:12 +0100
Subject: how to convert 4 bytes into a float ?
In-Reply-To: <1grny4s.18evsxl1g1c7eaN%aleaxit@yahoo.com>
References: <cua4gu$pf7$1@s1.news.oleane.net>
	<1grny4s.18evsxl1g1c7eaN%aleaxit@yahoo.com>
Message-ID: <cua6ag$qj1$1@s1.news.oleane.net>

Alex Martelli a ?crit :

> Jean-Baptiste PERIN <jb_perin at yahoo.fr> wrote:
> 
> 
>>I read 4 bytes from a binary file.
>>
>>These bytes represent a floating point number (mantisse exponent form)
>>
>>How can I get a float from these bytes ?
> 
> 
> See the docs for module struct, specifically the struct.unpack function,
> if the float is in the binary format your machine expects (or possibly
> that but with the wrong endianity).  If the float's binary format is
> different from what your machine uses, you're in for a lot of painful
> bit-twiddling.
> 
> 
> Alex

I'll have to handle Intel-PC, DEC-VAX and MIPS-SUN/SGI numbers
So I can't escape the painful bit-twiddling

Anyway, struct.unpack will undoubtedly be an incredibly valuable help

thank you very very very much ..

JiB?


From steven.bethard at gmail.com  Wed Feb  2 01:53:41 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 01 Feb 2005 23:53:41 -0700
Subject: a quick question about namespaces
In-Reply-To: <1107324516.561056.164020@o13g2000cwo.googlegroups.com>
References: <1107324516.561056.164020@o13g2000cwo.googlegroups.com>
Message-ID: <GsedneiBnfBp5Z3fRVn-tQ@comcast.com>

Jay donnell wrote:
> in the code below 'print locals()' shows mc2. What is the equivalent
> way to see the namespace that mc resides in?
> 
> 
> class myClass:
> --def func1(self):
> ----self.mc = 1
> ----mc2 = 3
> ----print 'in myClass.func1'
> ----print 'printing locals'
> ----print locals()
> ----print

I think you're looking for vars(self) or self.__dict__:

py> class MyClass(object):
...     def func1(self):
...         self.mc = 1
...         mc2 = 3
...         print locals()
...         print vars(self)
...         print self.__dict__
...
py> MyClass().func1()
{'self': <__main__.MyClass object at 0x027D8550>, 'mc2': 3}
{'mc': 1}
{'mc': 1}

HTH,

Steve


From irmen.NOSPAM at xs4all.nl  Thu Feb 10 11:52:04 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Thu, 10 Feb 2005 17:52:04 +0100
Subject: is there a safe marshaler?
In-Reply-To: <420b6e98$0$23018$626a14ce@news.free.fr>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<420b6e98$0$23018$626a14ce@news.free.fr>
Message-ID: <420b9135$0$28982$e4fe514c@news.xs4all.nl>

Pierre Barbier de Reuille wrote:
> Irmen de Jong a ?crit :
> 
>> Pickle and marshal are not safe. They can do harmful
>> things if fed maliciously constructed data.
>> That is a pity, because marshal is fast.
>> I need a fast and safe (secure) marshaler.
>> Is xdrlib the only option?
>> I would expect that it is fast and safe because
>> it (the xdr spec) has been around for so long.
>>
>> Or are there better options (perhaps 3rd party libraries)?
>>
>> Thanks
>>
>> Irmen.
> 
> 
> What exactly do you mean by "safe" ? Do you want to ensure your objects 
> cannot receive corrupted data ? Do you want to ensure no code will be 
> evaluated during the unmarshalling ?

"safe (secure)"
But to be more precise, let's look at the security warning that
is in the marshal documentation:
"The marshal module is not intended to be secure against erroneous or 
maliciously constructed data. Never unmarshal data received from an 
untrusted or unauthenticated source."

So essentially I want the opposite of that ;-)

I want a marshalar that is okay to use where the data it processes
comes from unknown, external sources (untrusted). It should not crash
on corrupt data and it should not execute arbitrary code when
unmarshaling, so that it is safe against hacking attempts.

Oh, preferrably, it should be fast :)
Some XML-ish thing may be secure but is likely to be not fast at all.

Ideally it should be able to transfer user defined Python types,
but if it is like marshal (can only marshal builtin types) that's
okay too.

--Irmen


From s.varun at gmail.com  Thu Feb 24 15:20:41 2005
From: s.varun at gmail.com (Varun)
Date: Thu, 24 Feb 2005 20:20:41 -0000
Subject: Python Online Programming Contest
Message-ID: <cvlcup+ammi@eGroups.com>


Hi Friends,
Department of Information Technology, Madras Institute of Technology,
Anna University, India
is conducting a technical symposium, Samhita. As a part of samhita, an
Online Programming Contest is scheduled on Sunday, 27 Feb 2005.

This is the first Online Programming Contest in India to support
Python !!!!.
Other languages supported are C and C++.

For Registration and Rules of the contest, http://www.samhita.info/opc
For details about samhita http://www.samhita.info/

Regards,
-Online Programming Contest team





From steve at holdenweb.com  Thu Feb  3 07:37:06 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 03 Feb 2005 07:37:06 -0500
Subject: IDLE history, Python IDE, and Interactive Python with Vim
In-Reply-To: <mailman.1807.1107431067.22381.python-list@python.org>
References: <opsllommgvb1cml1@ashot>
	<mailman.1807.1107431067.22381.python-list@python.org>
Message-ID: <0%oMd.102684$Jk5.10686@lakeread01>

Richie Hindle wrote:

> [Ashot]
> 
>>I have been frustrated for quite some time with a lack of a history  
>>command in IDLE
> 
> 
> To recall a line from your history in IDLE, cursor up to that line and hit
> Enter.
> 
The history is required to be available in a chunk, to copy and paste 
into a file.

> 
>>I've tried something called pyCrust, but this too didn't have history
> 
> 
> To recall a line from your history in PyCrust, press Ctrl+UpArrow.
> 
Ditto

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From dial#####$$NOSPAM##$#$## at gmail.com  Wed Feb 23 17:47:08 2005
From: dial#####$$NOSPAM##$#$## at gmail.com (Valentino Volonghi aka Dialtone)
Date: Wed, 23 Feb 2005 23:47:08 +0100
Subject: Python and "Ajax technology collaboration"
References: <1109193970.029421.213490@l41g2000cwc.googlegroups.com>
	<opsmn8bcnw6yt6e7@news.cisco.com>
Message-ID: <1gsgn7j.1sr4el39la6ctN%dial#####$$NOSPAM##$#$##@gmail.com>

aurora <aurora00 at gmail.com> wrote:

> It was discussed in the last Bay Area Python Interest Group meeting.
> 
> Thursday, February 10, 2005
> Agenda: Developing Responsive GUI Applications Using HTML and HTTP
> Speakers: Donovan Preston
> http://www.baypiggies.net/
> 
> The author has a component LivePage for this. You may find it from  
> http://nevow.com/. Similar idea from the Javascript stuff but very Python
> centric.

As an example for that technology (LivePage) I have this:

http://vercingetorix.dyndns.org:20080/

Which is an online forum where the "Quote & Reply" function is done with
XMLHttpRequest and Python.

Implementing this stuff in the forum with Nevow ( the framework created
by Donovan who I help to develop ) was almost effortless. 

-- 
Valentino Volonghi aka Dialtone
Now Running MacOSX 10.3.8
Blog: http://vvolonghi.blogspot.com
http://weever.berlios.de


From flupke at nonexistingdomain.com  Thu Feb 10 10:35:22 2005
From: flupke at nonexistingdomain.com (flupke)
Date: Thu, 10 Feb 2005 15:35:22 GMT
Subject: python equivalent to access reports
In-Reply-To: <D9LOd.8257$yJ7.474177@phobos.telenet-ops.be>
References: <D9LOd.8257$yJ7.474177@phobos.telenet-ops.be>
Message-ID: <_aLOd.8259$yJ7.474177@phobos.telenet-ops.be>

flupke wrote:
> Hi,
> 
> a lot of applications here a made with access. Tables, forms, reports 
> and the like. Now i rather use Python to do this but i'm not sure how to 
> proceed. I can use wxPython for a gui via wxGlade for rapid testing and 
> design (forms), MySQL as db (tables) but the report part is what's 
> bothering me.
> The only semi easy way that i see is by making html files with the 
> results in and then opening a browser to display the result.
> But this would lack nice printing as there is no way to cleanly start a 
> new page.
> 
> Any other ideas?
> 
> Thanks,
> Benedict

I just saw a reference too http://www.reportlab.org/
This might do what i want.

Benedict


From pinard at iro.umontreal.ca  Wed Feb  9 18:38:56 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Wed, 9 Feb 2005 18:38:56 -0500
Subject: A great Alan Kay quote
In-Reply-To: <XL6dnQ1rPechD5ffRVn-uw@powergate.ca>
References: <420a5c1e$0$21630$a1866201@visi.com>
	<XL6dnQ1rPechD5ffRVn-uw@powergate.ca>
Message-ID: <20050209233856.GA26688@alcyon.progiciels-bpi.ca>

[Peter Hansen]

> Then Perl is an "agglutination of styles", while Python might
> be considered a "crystallization of features"...

Grosso modo, yes.  Yet, we should recognise that Python agglutinated
a few crystals in the recent years. :-)

It gave up some of its purity for practical reasons.  We got rather far
from the "There is only one way to do it!" that once was Python motto.

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From leo at lspace.org  Wed Feb 16 16:01:47 2005
From: leo at lspace.org (Leo Breebaart)
Date: 16 Feb 2005 21:01:47 GMT
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
Message-ID: <37hqlrF59l2b2U1@individual.net>


John Machin <sjmachin at lexicon.net> writes:


> On 16 Feb 2005 18:47:21 GMT, Leo Breebaart <leo at lspace.org> wrote:
> 
> >What I can't find an explanation for is why str.join() doesn't
> >automatically call str() on its arguments, so that e.g.
> >str.join([1,2,4,5]) would yield "1245", and ditto for e.g.
> >user-defined classes that have a __str__() defined.
> 
> For a start, I think you meant ''.join([1,2,4,5]) to yield
> "1245".

Yep. Sorry. Bad example.
 

> Secondly, concatenating arbitrary types with a null separator doesn't
> appear to be a good use case.
> E.g.
> >>> ''.join([str(x) for x in [1,2,1./3,4]])
> '120.3333333333334'

Okay:

>>> ', '.join(str(x) for x in [1,2,1./3,4])
'1, 2, 0.333333333333, 4'

Isn't that better?

I am not claiming that *all* uses of calling join() on arbitrary
types are useful. But then neither are *all* uses of calling
join() on actual strings, or all uses of adding arbitrarily typed
elements to a list, or...

It's just that in my experience so far, whenever I have felt a
need for the 'join()' function, it has *always* been in a
situation where I also have to do the str(x) thing. That suggests
to me an "obvious default" of the kind that exists elsewhere in
Python as well.

It is entirely possible that my experience is not shared (or not
to the same extent) by others, but part of my reason for asking
this question here is investigating precisely that.


> Some possible explanations:
> 
> 1. Explicit is better than implicit.

Sure. But it's always a tradeoff -- list comprehensions are more
implicit than for loops...


> 2. It would only be a good "trick" IMHO with a non-null
> separator and types with a 'clean' str() result (unlike float)
> -- like int; I can't think of more at the moment.

I don't agree that the str() result for a float isn't clean.
Sometimes it can be exactly what you need, or even just
sufficient. If you want more control, then pure join() isn't what
you need, anyway. Right?


> 3. It would be one step on the slippery downwards path to
> perlishness.

I think you're exaggerating, and I really would prefer to have
this discussion without gratuitous swipes against other
languages, please?


> 4. For consistency, would you like "1" + 2 to produce "12"?

No. A foolish consistency etc. etc. I sincerely do like the fact
that Python does not try to second-guess the programmer, I do
value explicit over implicit, and I have no desire to open the
can of worms that would be the changing the semantics of +.


I think my main dissatisfaction with your four possible
explanations stems from the fact that a join() function that
would be a bit more type-agnostic strikes me as *more* Pythonic,
not *less*. Isn't that what duck typing is about? Why does join()
care that its arguments should be actual strings only? If the
function of join() is to produce a string, why isn't it
sufficient for its arguments to have a string representation --
why do they have to *be* strings? Isn't that sort of thing
exactly how we are taught *not* to write our own argument
handling when we learn Python?

-- 
Leo Breebaart  <leo at lspace.org>


From harlinseritt at yahoo.com  Wed Feb 23 04:35:56 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 23 Feb 2005 01:35:56 -0800
Subject: user interface for python
References: <1109131790.140672.209730@l41g2000cwc.googlegroups.com>
	<1109150221.947518.209220@o13g2000cwo.googlegroups.com>
Message-ID: <1109151356.896348.58940@g14g2000cwa.googlegroups.com>

Tkinter!
Ease            *****     Well-documented? Easy to Learn?
Functionality   *****     Can I get it to do what I need it to do?
Looks           ***       Does it look good?

Well, beauty is after all in the eye of the beholder. Anything I can
get to work on either platform with minimum effort and quick writing
looks good to me :-)



From dyoo at hkn.eecs.berkeley.edu  Mon Feb 14 18:28:10 2005
From: dyoo at hkn.eecs.berkeley.edu (Daniel Yoo)
Date: Mon, 14 Feb 2005 23:28:10 +0000 (UTC)
Subject: Multidimensional arrays - howto?
References: <1108423310.463006.318320@f14g2000cwb.googlegroups.com>
Message-ID: <curc6a$qm8$1@agate.berkeley.edu>

doodle4 at gmail.com wrote:
: Hello all,

: I am trying to convert some C code into python. Since i am new to
: python, i would like to know how to deal with multidimensional arrays?


Here you go:


http://python.org/doc/faq/programming.html#how-do-i-create-a-multidimensional-list


Also, if your table is relatively sparse, you might even be able to
use a dictionary, because a 2-d array can be considered as a mapping
between (index1, index2) keys and its values.


From ajikoe at gmail.com  Tue Feb  1 06:02:32 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 1 Feb 2005 03:02:32 -0800
Subject: type of simple object
Message-ID: <1107255752.258025.50870@z14g2000cwz.googlegroups.com>

Hi,

How do I know type of simple object is tuple or list or integer, for
example my function should understand what is the object type passed in
its argument

Pujo



From ville at spammers.com  Mon Feb 21 03:16:50 2005
From: ville at spammers.com (Ville Vainio)
Date: 21 Feb 2005 10:16:50 +0200
Subject: [Fwd: Re: [Uuu-devel] languages] <-- Why Python
References: <mailman.2781.1108677768.22381.python-list@python.org>
	<1108678805.542584.171930@z14g2000cwz.googlegroups.com>
	<mailman.2783.1108679758.22381.python-list@python.org>
	<864qgaisoq.fsf@guru.mired.org>
	<mailman.2785.1108689484.22381.python-list@python.org>
	<86vf8qhcql.fsf@guru.mired.org>
	<mailman.2787.1108691319.22381.python-list@python.org>
	<86r7jdh5vw.fsf@guru.mired.org>
	<mailman.2852.1108869628.22381.python-list@python.org>
	<86fyzqh3xb.fsf@guru.mired.org>
Message-ID: <du7k6p2uy31.fsf@lehtori.cc.tut.fi>

>>>>> "Mike" == Mike Meyer <mwm at mired.org> writes:

    Mike> IPython's pysh seems a little clumsy for interactive use, as
    Mike> it requires special characters to distinguish between
    Mike> commands to be passed to the shell and commands to be passed
    Mike> to the scripting language. This should be contrasted with

What do you mean by "the commands to be passed to the shell"? Commands
on the path (the normal situation in Unix) can be executed directly
just like in bash et al. Ditto for "magic" functions if "automagic" is
on.

I only use ! for calling commands that are in the current directory. A
*real* deficiency with ipython/pysh under Linux is the lack of job
control (in the sense that ^z suspends the whole ipython). I don't see
why pysh would not be able to match and exceed the capabilities of
shell in job control as well. It's not a priority for fperez himself
ATM, but we'll see how easy it is to add shellish job control in the
future after the refactoring...

    Mike> I'll say it again - if you're arguing about which language
    Mike> to use, you're arguing about the wrong thing.

In a sense C is the native language of Unix and Windows (system calls
are in C). It might make sense to expose the OS as Python objects.

I work w/ Symbian OS in my day job, with the OS API in C++. I'm not
sure whether it's a good idea or not, but at least some people are
doing it :).

-- 
Ville Vainio   http://tinyurl.com/2prnb


From matthew_shomphe at countrywide.com  Fri Feb  4 13:56:06 2005
From: matthew_shomphe at countrywide.com (Matt)
Date: 4 Feb 2005 10:56:06 -0800
Subject: newbie: Syntax error
References: <TrPMd.13383$3W3.8066@bignews4.bellsouth.net>
Message-ID: <1107543366.863177.281430@c13g2000cwb.googlegroups.com>


Chad Everett wrote:
> Hi Everyone,
>
> I am new to Python and programming in general.  I bought the book
"Python
> Programming for the Absolute Beginner" by michael Dawson.
>
> I have been working through it but am having trouble.
> I am trying to make a coin flip program and keep geting a Synax Error
> "invalid syntax".
>
> If anyone has a moment could you please look at it and tell me what I
am
> doing wrong.
>
> thanks for your time and patience.
>
> Chad
>
> # Coin Flip Program
> # This program flips a coin 100 times and tells the number of heads
and
> tails.
> # Chad Everett 2/3/2005
>
>
> print "\t\t********Coin Flip Game*********\n"
> import random
>
> # heads = 1
> # tails = 2
>
> tries = random.randrange(2) + 1
> count = 1
>
> while count != 100:
>     if tries == 1:
>         heads = 1
>         count += 1
>
>     else tries == 2:  # I AM GETTING THE SYNTAX ERROR HERE
>         tails = 1
>         count += 1
>
> print "heads: " + heads
> print "tails: " + tails
>
> raw_input("Press enter to quit")

Chad,

The problem is that you have the statement "tries == 2" after "else".
The proper syntax is:
>     elif tries == 2:  # note "elif"
>         tails = 1
>         count += 1

Here's an example of if/elif/else statements in Python:
http://www.network-theory.co.uk/docs/pytut/tut_21.html

Enjoy learning!



From gsakkis at rutgers.edu  Sat Feb 19 20:22:15 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: Sat, 19 Feb 2005 20:22:15 -0500
Subject: Distutils: relative paths
References: <mailman.2843.1108854701.22381.python-list@python.org>
Message-ID: <37q72aF5gpb40U1@individual.net>


"Frans Englich" <frans.englich at telia.com> wrote in message
news:mailman.2843.1108854701.22381.python-list at python.org...
>
> Hello,
>
> I have trouble installing a data directory which is not a child of my package
> directory in the source directory.
>
> My source directory looks like this:
>
> ./setup.py
> schemas/*.xsd
> foo/*.py
>
> And when it's installed, it should look like:
>
> site-packages/foo/*.py
> site-packages/foo/schemas/*.xsd
>
> In other words, schemas, from being a sibling of foo, became a child of foo.
>
> Now, how is this expressed in the setup.py?
>
> I tried this:
>
> setup( name="Foo",
>     packages=["foo"],
>     package_data={ "foo": ["../schemas/*.xsd"] },
>     package_dir={ "foo": "foo"},
> [...]
>
> but it resulted in schemas being a package, not child of foo(!).
>
> I've read the relevant page in the reference manual,
> http://www.python.org/doc/current/dist/node11.html
>
> but I can't find the trick. Any ideas?
>
>
> Cheers,
>
> Frans
>

If I interpret it correctly, "the files are expected to be part of the package in the source
directories" means that you cannot specify a sibling directory as package data, so the easiest way
is to make "schemas" child of foo. If this is not possible, you may check the 'data_files' option
(http://www.python.org/doc/current/dist/node12.html).

George




From gharper at medplus.com  Fri Feb 25 09:09:23 2005
From: gharper at medplus.com (Harper, Gina)
Date: Fri, 25 Feb 2005 09:09:23 -0500
Subject: split a directory string into a list
Message-ID: <4D97153E7D88F44FB6B534C661EE42900300A89C@medexch1.medplus.com>

I would start with something like this:
somestring = '/foo/bar/beer/sex/cigarettes/drugs/alcohol/'
somelist = somestring.split('/')
print somelist
This is close to what you seem to want.  Good luck.
*gina*

-----Original Message-----
From: porterboy76 at yahoo.com [mailto:porterboy76 at yahoo.com] 
Sent: Friday, February 25, 2005 8:36 AM
To: python-list at python.org
Subject: split a directory string into a list


QUESTION:

How do I split a directory string into a list in Python, eg.

'/foo/bar/beer/sex/cigarettes/drugs/alcohol/'

becomes

['foo','bar','beer','sex','cigarettes','drugs','alcohol']

I was looking at the os.path.split command, but it only seems to
separate the filename from the path (or am I just using it wrong?). I
don't want to do it manually if I can help it, as there will have to be
exceptions for the cases where there is (not) a trailing (leading)
slash, or escape sequences involving /. Is there a built in command for
this?




From tom.willis at gmail.com  Thu Feb 24 18:15:15 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Thu, 24 Feb 2005 18:15:15 -0500
Subject: Interesting decorator use.
In-Reply-To: <A-2dnebKq7ywzoPfRVn-tQ@comcast.com>
References: <421e2398@nntp0.pdx.net>
	<mailman.3017.1109277781.22381.python-list@python.org>
	<M5adncYw-5gT04PfRVn-ug@comcast.com>
	<mailman.3022.1109283136.22381.python-list@python.org>
	<A-2dnebKq7ywzoPfRVn-tQ@comcast.com>
Message-ID: <b54d04890502241515275e2fed@mail.gmail.com>

On Thu, 24 Feb 2005 15:20:30 -0700, Steven Bethard
<steven.bethard at gmail.com> wrote:
> Tom Willis wrote:
> >>> Question on decorators in general. Can you parameterize those?
> >
> > Wow thanks for the explanation!! Some of it is a bit mind bending to
> > me at the moment , but I'm going to mess with it a bit.
> 
> Oh, I also should have mentioned that there's some explanation at:
> 
> http://www.python.org/peps/pep-0318.html
> 
> Specifically on parameterizing:
> 
> """The current syntax also allows decorator declarations to call a
> function that returns a decorator:
> 
> @decomaker(argA, argB, ...)
> def func(arg1, arg2, ...):
>      pass
> 
> This is equivalent to:
> 
> func = decomaker(argA, argB, ...)(func)
> 
> The rationale for having a function that returns a decorator is that the
> part after the @ sign can be considered to be an expression (though
> syntactically restricted to just a function), and whatever that
> expression returns is called. See declaration arguments [15]."""
> 
> But playing around with it is, IMHO, definitely the best way to figure
> it out. =)
> 
> STeVe
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
 Getting back to your recipe. Through the explanation of how to get
parameters in there, I see how it is possible to get a logger in
there.

Pretty slick that python can have AOP-like features sort of out of the box.


Thanks again, off to check out the link... 




-- 
Thomas G. Willis
http://paperbackmusic.net


From hebdemnobad at verizon.net  Sun Feb 20 12:57:05 2005
From: hebdemnobad at verizon.net (verizon account)
Date: Sun, 20 Feb 2005 12:57:05 -0500
Subject: help wanted: poser to ogre 3d python script
Message-ID: <001901c51775$973ff210$6401a8c0@mikonmobile2>

a community of online 3d developers is looking for a python script writer to write a script to export from poser to ogre3d .mesh/.skeleton formats, using the poser python script interpretor. please reply to hebdemnobad at verizon.net.

thanks!! 
-------------- next part --------------
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From Felix.Wiemann at gmx.net  Tue Feb 15 16:30:21 2005
From: Felix.Wiemann at gmx.net (Felix Wiemann)
Date: Tue, 15 Feb 2005 22:30:21 +0100
Subject: Can __new__ prevent __init__ from being called?
Message-ID: <87is4tldea.fsf@news2.ososo.de>

Sometimes (but not always) the __new__ method of one of my classes
returns an *existing* instance of the class.  However, when it does
that, the __init__ method of the existing instance is called
nonetheless, so that the instance is initialized a second time.  For
example, please consider the following class (a singleton in this case):

>>> class C(object):
...   instance = None
...   def __new__(cls):
...     if C.instance is None:
...       print 'Creating instance.'
...       C.instance = object.__new__(cls)
...       print 'Created.'
...     return cls.instance
...   def __init__(self):
...     print 'In init.'
...
>>> C()
Creating instance.
Created.
In init.
<__main__.C object at 0x4062526c>
>>> C()
In init.   <---------- Here I want __init__ not to be executed.
<__main__.C object at 0x4062526c>
>>>

How can I prevent __init__ from being called on the already-initialized
object?

I do not want to have any code in the __init__ method which checks if
the instance is already initialized (like "if self.initialized: return"
at the beginning) because that would mean I'd have to insert this
checking code in the __init__ method of every subclass.

Is there an easier way than using a metaclass and writing a custom
__call__ method?

-- 
Felix Wiemann -- http://www.ososo.de/


From ncoghlan at iinet.net.au  Sat Feb  5 11:26:11 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 06 Feb 2005 02:26:11 +1000
Subject: variable declaration
In-Reply-To: <MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
References: <1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
Message-ID: <4204F3A3.1020801@iinet.net.au>

Alexander Zatvornitskiy wrote:
> You wrote about "substantial cost" of var declarations. Yes, you are write. But
> think about the cost of lack of var declarations. Compare time that programmer
> will waste on search for the reason of bug caused by such typo, plus time what
> programmer will waste while remembering exact variable name.

This is a problem better solved through a decent editor with code completion 
than through redundant variable declarations, which waste *far* more programmer 
time than typos do.

The *only* time the typo is a potential problem is if a variable name gets 
rebound to something different. This is because, in Python, the name binding 
operation ('=') *is* the declaration of the variable.

Rebinding a name often begs the question, "why are you using the same name for 
two different things in the one function?" It's not like using a different name 
for the second thing will cost much in terms of program size (unless you have 
some freakishly long functions) and it surely does little for readability. 
(Granted, iteration can be an exception, but even then the name generally only 
gets bound twice at most - once before the loop, and once in the loop body)

Consider all of the following cases which are detected while still preserving 
the convenience of 'name binding is declaration':
Py> def f():
...   x = y
...
Py> f()
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "<stdin>", line 2, in f
NameError: global name 'y' is not defined
Py> def f():
...   x += 1
...
Py> f()
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "<stdin>", line 2, in f
UnboundLocalError: local variable 'x' referenced before assignment
Py> def f():
...   oops = 1
...   print ooops
...
Py> f()
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "<stdin>", line 3, in f
NameError: global name 'ooops' is not defined
Py> def f():
...   class C: pass
...   c = C()
...   print c.x
...
Py> f()
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "<stdin>", line 4, in f
AttributeError: C instance has no attribute 'x'

Now, if someone were to suggest a *rebinding* operator, that worked just like 
regular name binding, but expected the name to be already bound, that would be 
an entirely different kettle of fish - you keep all the benefits of the current 
system, but gain the typo-checking that the rest of the augmented assignment 
operators benefit from.

Hell, '@' just acquired rebinding semantics through its use in function 
decorator syntax, so how does it look?:

   S=0
   for eps in xrange(10):
     S @= S + ups

Meh. At symbols are still ugly. A full stop might work better, since the 
semantics aren't very different from a reader's point of view:

   S=0
   for eps in xrange(10):
     S .= S + ups

Anyway, the exact syntax isn't as important as the concept :)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From michele.simionato at gmail.com  Wed Feb  9 00:11:55 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 8 Feb 2005 21:11:55 -0800
Subject: Definitive documentation on newstyle classes? (WAS: Pickling
	and inheritance are making me hurt)
In-Reply-To: <4208FBFD.6000303@sympatico.ca>
References: <1d6cdae305020516467620aa0@mail.gmail.com>
	<mailman.2002.1107653711.22381.python-list@python.org>
	<4208FBFD.6000303@sympatico.ca>
Message-ID: <1107925915.042588.43000@c13g2000cwb.googlegroups.com>

> It would be good to have a clear exposition of the pros and cons of
> __new__ usage.

It is there mostly because __init__ would not work on immutable types.
OTOH, you probably do not want to use __new__ on mutable types
(once I was caught by this trap, google for "overriding list.__new__"
if you are interested).
 
   Michele Simionato



From eppstein at ics.uci.edu  Fri Feb 18 22:17:30 2005
From: eppstein at ics.uci.edu (David Eppstein)
Date: Fri, 18 Feb 2005 19:17:30 -0800
Subject: exercise: partition a list by equivalence
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<mailman.2803.1108743668.22381.python-list@python.org>
	<1108768870.455974.244590@c13g2000cwb.googlegroups.com>
	<eppstein-8851A4.18394418022005@news.service.uci.edu>
Message-ID: <eppstein-E14CB1.19173018022005@news.service.uci.edu>

In article <eppstein-8851A4.18394418022005 at news.service.uci.edu>,
 David Eppstein <eppstein at ics.uci.edu> wrote:

> It can be solved by union-find
> (e.g. with UnionFind from <http://www.ics.uci.edu/~eppstein/PADS/>):

Here's a cleaned up version, after I added a proper iter() method to the 
UnionFind data structure:

import UnionFind

def merge(pairs):
    uf = UnionFind.UnionFind()
    for a,b in pairs:
        uf.union(a,b)
    components = {}
    for a in uf:
        components.setdefault(uf[a],[]).append(a)
    return components.values()

> If you do all the unions before all the finds, as in this algorithm, 
> union-find is O(n).

That was a little too sloppy.  It is possible to solve the union find 
problem, with all unions before all finds, in time O(n).  However the 
usual union find data structure takes more time, O(n alpha(n)).

> However it might be easier to treat the input pairs as the edges of a 
> graph and apply a depth-first-search based graph connected components 
> algorithm.

This would be O(n), though.

-- 
David Eppstein
Computer Science Dept., Univ. of California, Irvine
http://www.ics.uci.edu/~eppstein/


From b at b.b  Sun Feb 13 19:05:10 2005
From: b at b.b (Roose)
Date: Mon, 14 Feb 2005 00:05:10 GMT
Subject: builtin functions for and and or?
References: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>	<37a2i0F58gsbsU1@individual.net>	<1108335152.338013.45530@z14g2000cwz.googlegroups.com><8xRPd.4678$ZZ.3668@newssvr23.news.prodigy.net>
	<mailman.2498.1108338626.22381.python-list@python.org>
Message-ID: <WWRPd.4686$ZZ.1221@newssvr23.news.prodigy.net>

> Previous discussion on this topic:
> http://groups-beta.google.com/group/comp.lang.python/msg/a76b4c2caf6c435c
>
> Michael
>

OK, well then.  That's really the exact same thing, down to the names of the
functions.  So what ever happened to that?  That was over a year ago!  I
don't see any mention of it in PEP 289?

http://www.python.org/peps/pep-0289.html

It would be hard to imagine such a trivial change being rejected, if it were
in its own namespace.  Did it just happen that no one implemented it?

Or it looks like no one could agree on the names?  From that thread, I see
any/all, anytrue/alltrue, forall/exists.  Either of the first two is fine
with me.





From francis.girard at free.fr  Thu Feb 10 13:43:36 2005
From: francis.girard at free.fr (Francis Girard)
Date: Thu, 10 Feb 2005 19:43:36 +0100
Subject: A great Alan Kay quote
In-Reply-To: <cpkl01hg54cbp9mjnnkevbn0chps4psam2@4ax.com>
References: <420a5c1e$0$21630$a1866201@visi.com>
	<mailman.2270.1107980587.22381.python-list@python.org>
	<cpkl01hg54cbp9mjnnkevbn0chps4psam2@4ax.com>
Message-ID: <200502101943.36347.francis.girard@free.fr>

Le jeudi 10 F?vrier 2005 04:37, Arthur a ?crit?:
> On Wed, 9 Feb 2005 21:23:06 +0100, Francis Girard
>
> <francis.girard at free.fr> wrote:
> >I love him.
>
> I don't.
>
> >It's also interesting to see GUIs with windows, mouse (etc.), which
> > apparently find their origin in is mind, probably comes from the desire
> > to introduce computers to children.
>
> Alfred Bork, now
> Professor Emeritus
> Information and Computer Science
> University of California, Irvine 92697
>
> had written an article in 1980 called
>
> "Interactive Learning" which began
>
> "We are at the onset of a major revolution in education, a revolution
> unparalleled since the invention of the printing press. The computer
> will be the instrument of this revolution."
>
> In 2000 he published:
>
> "Interactive Learning: Twenty Years Later"
>
> looking back on his orignal article and its optimistic predictions and
> admitting "I was not a very good prophet"
>
> What went wrong?
>
> Among other things he points (probably using a pointing device) at the
> pointing device
>
> """
> Another is the rise of the mouse as a computer device. People had the
> peculiar idea that one could deal with the world of learning purely by
> pointing.
>
> """
> The articles can be found here:
>
> http://www.citejournal.org/vol2/iss4/seminal.cfm
>
> One does not need to agree or disagree, it seems to me about this or
> that point on interface, or influence, or anything else. What one does
> need to do is separate hope from actuality, and approach the entire
> subject area with some sense of what is at stake, and with some true
> sense of the complexity of the issues, in such a  way that at this
> stage of the game the only authentic stance is one of humility,
>
> Kay fails the humility test, dramatically. IMO.

I think I've been enthouasistic too fast. While reading the article I grew 
more and more uncomfortable with sayings like :

- Intel and Motorola don't know how to do micro-processors and did not 
understand anything in our own architecture
- Languages of today are features filled doggy bags
- Java failed where I succeeded
- I think beautifully like a mathematician while the rest is pop culture
- etc.

I'm not sure at all he likes Python. Python is too pragmmatic for him. And its 
definition does not hold in the palm of his hand. 

I think he's a bit nostalgic.

Francis Girard
or




>
> Art



From steve at holdenweb.com  Thu Feb  3 13:00:02 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 03 Feb 2005 13:00:02 -0500
Subject: Is there a market for python developers?
In-Reply-To: <1107443452.965779.129760@l41g2000cwc.googlegroups.com>
References: <1107440354.317628.221090@g14g2000cwa.googlegroups.com>
	<1107443452.965779.129760@l41g2000cwc.googlegroups.com>
Message-ID: <NJtMd.102704$Jk5.10592@lakeread01>

beliavsky at aol.com wrote:

> Mabon Dane wrote:
> 
>>I am new to python and took my first attempts at working with this
>>language today.  Is there a market for people who work with Python?
> 
> 
> You can Google this newsgroup for "beliavsky at aol.com jobs" to find two
> messages I posted with statistics.
> 
Also, take a look at http://www.python.org/Jobs.html

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From grante at visi.com  Mon Feb 14 18:04:24 2005
From: grante at visi.com (Grant Edwards)
Date: 14 Feb 2005 23:04:24 GMT
Subject: parsing IMAP responses?
References: <42111b20$0$44604$a1866201@visi.com>
	<42112bb4$0$17746$626a14ce@news.free.fr>
Message-ID: <42112e78$0$44604$a1866201@visi.com>

On 2005-02-14, Damien Wyart <damien.wyart at free.fr> wrote:
> * Grant Edwards <grante at visi.com> in comp.lang.python:
>> Is there a library somewhere that impliments the IMAP protocol syntax?
>
> Maybe the "core" part of getmail could be reused, it seems
> cleanly written.
> http://www.qcc.ca/~charlesc/software/getmail-4/

Thanks -- I'll take a look.

-- 
Grant Edwards                   grante             Yow!  Mary Tyler Moore's
                                  at               SEVENTH HUSBAND is wearing
                               visi.com            my DACRON TANK TOP in a
                                                   cheap hotel in HONOLULU!


From raghulj at gmail.com  Tue Feb 22 00:06:30 2005
From: raghulj at gmail.com (Raghul)
Date: 21 Feb 2005 21:06:30 -0800
Subject: UID python reading mail
Message-ID: <1109048790.342769.180020@o13g2000cwo.googlegroups.com>

I am totally confused of using uid .Can anyone help me in giving a
sample code for reading mail nad printing their uid's. I think this
would be more useful for freshers like me.

Thanks  in advance



From aurora00 at gmail.com  Wed Feb 23 17:19:50 2005
From: aurora00 at gmail.com (aurora)
Date: Wed, 23 Feb 2005 14:19:50 -0800
Subject: Python and "Ajax technology collaboration"
References: <1109193970.029421.213490@l41g2000cwc.googlegroups.com>
Message-ID: <opsmn8bcnw6yt6e7@news.cisco.com>

It was discussed in the last Bay Area Python Interest Group meeting.

Thursday, February 10, 2005
Agenda: Developing Responsive GUI Applications Using HTML and HTTP
Speakers: Donovan Preston
http://www.baypiggies.net/

The author has a component LivePage for this. You may find it from  
http://nevow.com/. Similar idea from the Javascript stuff but very Python  
centric.


>
> Interesting GUI developments, it seems. Anyone developed a "Ajax"
> application using Python? Very curious....
>
> thx
>
> (Ajax stands for:
> XHTML and CSS;
> dynamic display and interaction using the Document Object Model;
> data interchange and manipulation using XML and XSLT;
> asynchronous data retrieval using XMLHttpRequest;
> and JavaScript binding everything together
>
> ie Google has used these technologies to build Gmail, Google Maps etc.
>
> more info:
> http://www.adaptivepath.com/publications/essays/archives/000385.php)
>



From pu at luxemburg.lu  Sat Feb 26 04:43:21 2005
From: pu at luxemburg.lu (Patrick Useldinger)
Date: Sat, 26 Feb 2005 10:43:21 +0100
Subject: fdups: calling for beta testers
In-Reply-To: <1109380525.262724.275780@g14g2000cwa.googlegroups.com>
References: <421f97eb$1@news.vo.lu>
	<1109380525.262724.275780@g14g2000cwa.googlegroups.com>
Message-ID: <422044b9$1@news.vo.lu>

John Machin wrote:

> (1) It's actually .bz2, not .bz (2) Why annoy people with the
> not-widely-known bzip2 format just to save a few % of a 12KB file?? (3)
> Typing that on Windows command line doesn't produce a useful result (4)
> Haven't you heard of distutils?

(1) Typo, thanks for pointing it out
(2)(3) In the Linux world, it is really popular. I suppose you are a 
Windows user, and I haven't given that much thought. The point was not 
to save space, just to use the "standard" format. What would it be for 
Windows - zip?
(4) Never used them, but are very valid point. I will look into it.

> (6) You are keeping open handles for all files of a given size -- have
> you actually considered the possibility of an exception like this:
> IOError: [Errno 24] Too many open files: 'foo509'

(6) Not much I can do about this. In the beginning, all files of equal 
size are potentially identical. I first need to read a chunk of each, 
and if I want to avoid opening & closing files all the time, I need them 
open together.
What would you suggest?

> Once upon a time, max 20 open files was considered as generous as 640KB
> of memory. Looks like Bill thinks 512 (open files, that is) is about
> right these days.

Bill also thinks it is normal that half of service pack 2 lingers twice 
on a harddisk. Not sure whether he's my hero ;-)

> (7)
> Why sort? What's wrong with just two lines:
> 
> ! for size, file_list in self.compfiles.iteritems():
> !     self.comparefiles(size, file_list)

(7) I wanted the output to be sorted by file size, instead of being 
random. It's psychological, but if you're chasing dups, you'd want to 
start with the largest ones first. If you have more that a screen full 
of info, it's the last lines which are the most interesting. And it will 
produce the same info in the same order if you run it twice on the same 
folders.

> (8)     global
> MIN_FILESIZE,MAX_ONEBUFFER,MAX_ALLBUFFERS,BLOCKSIZE,INODES
> 
> That doesn't sit very well with the 'everything must be in a class'
> religion seemingly espoused by the following:

(8) Agreed. I'll think about that.

> (9) Any good reason why the "executables" don't have ".py" extensions
> on their names?

(9) Because I am lazy and Linux doesn't care. I suppose Windows does?

> All in all, a very poor "out-of-the-box" experience. Bear in mind that
> very few Windows users would have even heard of bzip2, let alone have a
> bzip2.exe on their machine. They wouldn't even be able to *open* the
> box.

As I said, I did not give Windows users much thought. I will improve this.

> And what is "chown" -- any relation of Perl's "chomp"?

chown is a Unix command to change the owner or the group of a file. It 
has to do with controlling access to the file. It is not relevant on 
Windows. No relation to Perl's chomp.

Thank you very much for your feedback. Did you actually run it on your 
Windows box?

-pu


From nhodgson at bigpond.net.au  Sun Feb 20 18:12:19 2005
From: nhodgson at bigpond.net.au (Neil Hodgson)
Date: Sun, 20 Feb 2005 23:12:19 GMT
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>	<42172136$0$27576$9b622d9e@news.freenet.de>	<cv7i57$d0v$1@usenet.otenet.gr>	<42185b05$0$15460$9b622d9e@news.freenet.de>	<cv9sdo$69n$3@usenet.otenet.gr>	<42189527$0$6260$9b622d9e@news.freenet.de>	<cvadcj$mqc$1@usenet.otenet.gr>
	<mailman.2866.1108917759.22381.python-list@python.org>
	<cvafgu$2lk$1@usenet.otenet.gr>
	<4218cafe$0$8790$9b622d9e@news.freenet.de>
Message-ID: <nP8Sd.168927$K7.31366@news-server.bigpond.net.au>

Martin v. L?wis:

> So I have to guess what you could have meant. If you want
> to be understood, you might have phrased the question like
> this:
>
> "Should I take answers from people which do not respect coherence
> of writings serious?"

   The main grammatical problem with the question is the use of an adjective
("serious") rather than an adverb ("seriously") to modify the verb "take".

Should I take answers seriously?

   I'd also add in an article to point to the particular answers to be
disregarded.

Should I take these answers seriously?

   Next problem is the disagreement in number between "answers" and "answer"
which breaks the connection just as separating the questions does.

Answers from people which do not respect coherence of writings?

   There are more problems to fix but this is a start. Grammatical errors
are often perceived as rudeness.

> Perhaps the question was meant rhetoric.

   Aghhh! He's got you doing it too.

   Neil -- Aussie ear for the foreign guy




From 735115 at gmail.com  Sat Feb 19 22:58:23 2005
From: 735115 at gmail.com (Bryant Huang)
Date: 19 Feb 2005 19:58:23 -0800
Subject: Loading functions from a file during run-time
In-Reply-To: <1108659115.244291.110860@l41g2000cwc.googlegroups.com>
References: <1108091598.055004.24890@g14g2000cwa.googlegroups.com>
	<1108576067.140194.115620@c13g2000cwb.googlegroups.com>
	<1108580150.436813.227870@o13g2000cwo.googlegroups.com>
	<1108659115.244291.110860@l41g2000cwc.googlegroups.com>
Message-ID: <1108871903.762163.302350@f14g2000cwb.googlegroups.com>

Ah, thank you, Wensheng and T.J.! I have drawn bits and pieces from
what you have suggested. Both of your solutions work well.



From ncoghlan at iinet.net.au  Thu Feb 10 09:27:32 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 11 Feb 2005 00:27:32 +1000
Subject: convert list of tuples into several lists
In-Reply-To: <Z9ednTx4E-VaC5ffRVn-2Q@comcast.com>
References: <cud40u$vqb$01$1@news.t-online.com>	<36uihlF58p63iU1@individual.net>	<_cWdnZN4wO418pffRVn-qA@comcast.com>	<XL6dnRJrPeesD5ffRVn-uw@powergate.ca>
	<Z9ednTx4E-VaC5ffRVn-2Q@comcast.com>
Message-ID: <420B6F54.5090703@iinet.net.au>

Steven Bethard wrote:
> Peter Hansen wrote:
> 
>> Steven Bethard wrote:
>>
>>> Diez B. Roggisch wrote:
>>>
>>>> zip(*[(1,4),(2,5),(3,6)])
>>>
>>>
>>> While this is also the approach I would use, it is worth noting that 
>>> Guido thinks of this as an abuse of the argument passing machinery:
>>>
>>> http://mail.python.org/pipermail/python-dev/2003-July/037346.html
>>
>>
>> I'm not sure that's the same thread I already read where he
>> dissed zip like that, but what I'm wondering is what is the
>> alternative?  Is there an equally elegant approach that
>> doesn't "abuse" the argument passing machinery?
> 
> 
> I know I found it in another thread before.  I think he's said it a few 
> times.
> 
> Personally, I wish that, if we're not to use zip like this, that Python 
> would provide a builtin 'unzip' to do the corresponding thing.

I never really got the impression that Guido was particularly *strongly* opposed 
to this use of the extended call syntax. Merely that he was concerned that it 
would break down if the relevant list turned out to be large (that is, the abuse 
is using *args with a list when the list may turn out to be large, not a problem 
specifically with using the star syntax with zip()).

Maybe he's been more explicit somewhere, and I just never saw it.

Anyway, his concern seems justified, as my understanding is that func(*iterable) 
is roughly equivalent to func(*tuple(iterable)), which can be rather expensive 
when the iterable is a long list of tuples.

So zip(*zip(*iterable)) is actually zip(*tuple(zip(*tuple(iterable)))). That's 
potentially an awful lot of data copying for an identity operation :)

Anyway, I think it does make a decent case for an itertools.iunzip or some such 
beast.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From alexander.dietz at mpi-hd.mpg.de  Wed Feb 16 16:31:31 2005
From: alexander.dietz at mpi-hd.mpg.de (alex)
Date: 16 Feb 2005 13:31:31 -0800
Subject: Multiple initialization methods?
Message-ID: <1108589491.301007.174370@z14g2000cwz.googlegroups.com>

Hi,

it is possible to define multiple initialization methods so that the
method is used that fits?

I am thinking of something like this:

  def __init__(self, par1, par2):
    self.init(par1, par2);

  def __init__(self, par1):
    self.init(par1, None)

  def init(self, par1, par2):
     ...
     ...

So if the call is with one parameter only the second class is executed
(calling the 'init' method with the second parameter set to 'None' or
whatever. But this example does not work. 

How to get it work?

Alex



From maxm at mxm.dk  Mon Feb 28 06:27:08 2005
From: maxm at mxm.dk (Max M)
Date: Mon, 28 Feb 2005 12:27:08 +0100
Subject: Explicit or general importing of namespaces?
In-Reply-To: <cvuu66$jvu$1@gemini.csx.cam.ac.uk>
References: <1109588238.491145.52060@l41g2000cwc.googlegroups.com>
	<38gc2tF5o34sbU1@individual.net>
	<cvuu66$jvu$1@gemini.csx.cam.ac.uk>
Message-ID: <42230003$0$300$edfadb0f@dread12.news.tele.dk>

Michael Hoffman wrote:

> But don't do "from Tkinter import *" for the reasons Diez has
> identified in the FAQ.

It is so annoying to read some code and having to guess from where the 
do_complicated_stuff() function is imported from.

Explicit importing is by far the moste preferable.

-- 

hilsen/regards Max M, Denmark

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


From danperl at rogers.com  Wed Feb  2 12:22:24 2005
From: danperl at rogers.com (Dan Perl)
Date: Wed, 2 Feb 2005 12:22:24 -0500
Subject: how to write a tutorial
References: <1106305730.361540.21010@f14g2000cwb.googlegroups.com>
	<1106472508.591411.40140@c13g2000cwb.googlegroups.com>
	<1106723545.429728.308620@f14g2000cwb.googlegroups.com>
	<1107354540.608556.305540@z14g2000cwz.googlegroups.com>
	<1107362671.182505.22180@c13g2000cwb.googlegroups.com>
Message-ID: <IrednbfqvqXOkZzfRVn-1A@rogers.com>


"Xah Lee" <xah at xahlee.org> wrote in message 
news:1107362671.182505.22180 at c13g2000cwb.googlegroups.com...
> i've noticed that in Python official doc
> http://python.org/doc/lib/module-re.html
> and also How-To doc
> http://www.amk.ca/python/howto/regex/
>
> both mentions the book "Mastering Regular Expressions" by Jeffrey
> Friedl.
>
> I suggest it be dropped in both places. The mentioning of this book in
> the Perl/Python community is mostly a fawning behavior and confession
> that the author is among "in the know". This book and its mentioning is
> a cultish behavior among OpenSource morons.
>
> Most of the time, its mentioning as a reference is irrelevant. 99% uses
> of regex are the simplest uses. Spending time to read this book of
> specialization, from economy perspective, is a waste of time.
> Xah

We should drop the olympics too.  99% of  people don't practice any of those 
sports at a competitive level.  Who the hell does pole vaulting or throws a 
javelin?

Sorry, maybe I should have posted this in the "next Xah Lee post contest" 
thread.

Dan 




From ashot at removemolsoftthis.com  Fri Feb  4 05:58:53 2005
From: ashot at removemolsoftthis.com (Ashot)
Date: Fri, 04 Feb 2005 04:58:53 -0600
Subject: IPython colors in windows
References: <opslndb7l9ej1m1c@ashot>
	<1107487113.732375.110850@c13g2000cwb.googlegroups.com>
	<opslnmywarej1m1c@ashot>
	<mailman.1865.1107491434.22381.python-list@python.org>
Message-ID: <opsln54fpwej1m1c@ashot>

yea, I've done that. It must be something subtle, as the colors and tab  
completion works.
On Thu, 03 Feb 2005 20:31:37 -0800, DogWalker <forestiero at qwest.net> wrote:

> "Ashot" <ashot at removemolsoftthis.com> said:
>
>> On 3 Feb 2005 19:18:33 -0800, James <fphsml at gmail.com> wrote:
>>
>>>
>>> Ashot wrote:
>>>> I am using IPython in windows and the LightBG setting doesn't
>>> correctly
>>>> because the background of the text is black even if the console
>>> background
>>>> is white.  Anyone know whats going on?  Thanks.
>>>>
>>>> --
>>>> ==============================
>>>> Ashot Petrosian
>>>> University of Texas at Austin, Computer Sciences
>>>> (views expressed are solely my own)
>>>> ==============================
>>>
>>> Did you try installing readline for windows?
>>> http://newcenturycomputers.net/projects/readline.html
>>>
>>
>> yea I've installed that and ctypes.  The color and tab completion work,
>> its just that colored get displayed with black background, it almost  
>> works
>> so its very frustrating..
>>
>
> Did you try the following (from the manual)?:
>
> Input/Output prompts and exception tracebacks
>
>
> You can test whether the colored prompts and tracebacks work on your  
> system interactively by typing '%colors Linux' at the prompt (use  
> '%colors LightBG' if your terminal has a light background). If the input  
> prompt shows garbage like:
> [0;32mIn [[1;32m1[0;32m]: [0;00m
>  instead of (in color) something like:
>  In [1]:
>   this means that your terminal doesn't properly handle color escape  
> sequences. You can go to a 'no color' mode by typing '%colors NoColor'.
>
>
>   You can try using a different terminal emulator program. To  
> permanently set your color preferences, edit the file  
> $HOME/.ipython/ipythonrc and set the colors option to the desired value.



-- 
==============================
Ashot Petrosian
University of Texas at Austin, Computer Sciences
(views expressed are solely my own)
==============================


From grante at visi.com  Wed Feb  9 17:56:19 2005
From: grante at visi.com (Grant Edwards)
Date: 09 Feb 2005 22:56:19 GMT
Subject: negative integer division
References: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
	<42096EAD.879E8A5F@yahoo.com> <86wtti76cp.fsf@guru.mired.org>
	<420A916C.94F7F175@yahoo.com>
Message-ID: <420a9513$0$29477$a1866201@visi.com>

On 2005-02-09, Jive Dadson <jdadson at yahoo.com> wrote:

>> [C] isn't - it's a portable assembler.
>
> I've heard that many times, but it makes no sense to me.

I think the point is that C is a low-level, hardware twiddling
language to be used by people writing things like kernel code --
something that was always done in assembler before C came
along.

>> Now, I'll agree with you if you want to argue that some
>> machines do negative integer division in stupifyingly horrible
>> ways.
>
> That's why I think it was a stupifyingly horrible decision.

For a language meant to write user-space applications where one
probably cares what happens when a division results in a
negative integer, it is a horrible decision.  For a "portable
assembler" used to write device drivers it makes sense.  People
writing that sort of code presumably know how their hardware
behaves, don't expect that everything write is portable, and
just don't do division with negative numbers.  When they do
division, it's with postive numbers and they don't want to
waste the extra clock cycles to do it in a way that's
machine-independant for negative numbers.

The fact that C ended up in the rather inappropriate role of
a user-land application language is different problem.

-- 
Grant Edwards                   grante             Yow!  ... I think I'd
                                  at               better go back to my
                               visi.com            DESK and toy with a few
                                                   commonMISAPPREHENSIONS...


From john at grulic.org.ar  Thu Feb 10 08:19:04 2005
From: john at grulic.org.ar (John Lenton)
Date: Thu, 10 Feb 2005 10:19:04 -0300
Subject: hard_decoding
In-Reply-To: <420AA934.6050206@mayo.edu>
References: <420AA934.6050206@mayo.edu>
Message-ID: <20050210131903.GA3969@grulic.org.ar>

On Wed, Feb 09, 2005 at 05:22:12PM -0700, Tamas Hegedus wrote:
> Hi!
> 
> Do you have a convinient, easy way to remove special charachters from 
> u'strings'?
> 
> Replacing:
> ?????? 	=> A
> ????	=> e
> etc.
> 'L0xe1szl0xf3' => Laszlo
> or something like that:
> 'L\xc3\xa1szl\xc3\xb3' => Laszlo

for the examples you have given, this works:

    from unicodedata import normalize

    def strip_composition(unichar):
        """
        Return the first character from the canonical decomposition of
        a unicode character. This wil typically be the unaccented
        version of the character passed in (in Latin regions, at
        least).
        """
        return normalize('NFD', unichar)[0]

    def remove_special_chars(anystr):
        """
        strip_composition of the whole string
        """
        return ''.join(map(strip_composition, unicode(anystr)))

    for i in ('??????', '????',
              u'L\xe1szl\xf3',
              'L\xc3\xa1szl\xc3\xb3'):
        print i, '->', remove_special_chars(i)

produces:

    ?????? -> AAAAAA
    ???? -> eeee
    L?szl? -> Laszlo
    L?szl? -> Laszlo

although building a translation mapping is, in general, faster. You
could use the above to build that map automatically, like this:

    def build_translation(sample, table=None):
        """
        Return a translation table that strips composition characters
        out of a sample unicode string. If a table is supplied, it
        will be updated.
        """
        assert isinstance(sample, unicode), 'sample must be unicode'
        if table is None:
            table = {}
        for i in set(sample) - set(table):
            table[ord(i)] = ord(strip_composition(i))
        return table

this is much faster on larger strings, or if you have many strings,
but know the alphabet (so you compute the table once). You might also
try to build the table incrementally,

    for i in strings:
        i = i.translate(table)
        try:
            i.encode('ascii')
        except UnicodeEncodeError:
            table = build_translation(i, table)
            i = i.translate(table)
        stripped.append(i)

of course this won't work if you have other, non-ascii but
non-composite, chars in your strings.

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
El que est? en la ace?a, muele; que el otro va y viene. 
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From jzgoda at gazeta.usun.pl  Fri Feb 18 15:26:28 2005
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Fri, 18 Feb 2005 21:26:28 +0100
Subject: unicode encoding usablilty problem
In-Reply-To: <mailman.2813.1108754311.22381.python-list@python.org>
References: <opsmekm2ei6yt6e7@news.cisco.com>	<mailman.2811.1108751132.22381.python-list@python.org>	<opsmepfmcx6yt6e7@news.cisco.com>
	<mailman.2813.1108754311.22381.python-list@python.org>
Message-ID: <cv5j2o$ng5$1@atlantis.news.tpi.pl>

Walter D?rwald napisa?(a):

>> Is there a scheme for Python developer to use so that they are safe 
>> from  incorrect mixing?
> 
> 
> Put the following:
> 
> import sys
> sys.setdefaultencoding("undefined")
> 
> in a file named sitecustomize.py somewhere in your Python path and
> Python will complain whenever there's an implicit conversion between
> str and unicode.

This will help in your code, but there is big pile of modules in stdlib 
that are not unicode-friendly. From my daily practice come shlex 
(tokenizer works only with encoded strings) and logging (you cann't 
specify encoding for FileHandler).

-- 
Jarek Zgoda
http://jpa.berlios.de/ | http://www.zgodowie.org/


From gabriel.cooper at mediapulse.com  Thu Feb 24 13:01:15 2005
From: gabriel.cooper at mediapulse.com (Gabriel Cooper)
Date: Thu, 24 Feb 2005 13:01:15 -0500
Subject: update images inside a mysql database
In-Reply-To: <20050224173120.GF4724@resivo.mejo.net>
References: <20050224173120.GF4724@resivo.mejo.net>
Message-ID: <421E166B.20505@mediapulse.com>



Jonas Meurer wrote:

>def i_update(image, imgid):
>        image = "%s" % (image)
>        sql_exec = """UPDATE Images SET Image='%s' WHERE ImgID = '%s'
>                """ % (image, imgid)
>        o = open("/tmp/file.jpg", "w")
>        o.write(image)
>        o.close()
>        db_connect.cursor.execute(sql_exec)
>
I've never tried extensively to use images inside a database (too slow 
for most of my uses), but I thought I'd drop in to point out that you 
should, for security reasons, be using place holders on your sql. It 
might just fix your image problem as well, but I don't know. Also, 
converting a binary image into a string doesn't seem like it would be 
wise, but like I said, I've never tried it. At any rate, your function 
would look like this:

def i_update(image, imgid):
        image = "%s" % (image)
        o = open("/tmp/file.jpg", "w")
        o.write(image)
        o.close()
        db_connect.cursor.execute("""UPDATE Images SET Image=%s WHERE ImgID=%s""", 
				  (image, imgid))




From sjmachin at lexicon.net  Fri Feb 18 15:33:30 2005
From: sjmachin at lexicon.net (John Machin)
Date: 18 Feb 2005 12:33:30 -0800
Subject: re.compile and very specific searches
In-Reply-To: <cv5chc$k27$01$1@news.t-online.com>
References: <cv5ba4$nvn$1@solaris.cc.vt.edu>
	<cv5chc$k27$01$1@news.t-online.com>
Message-ID: <1108758810.163024.169750@g14g2000cwa.googlegroups.com>

Diez B. Roggisch wrote:


> So I'd suggest you dump re and do it like this:
>
> address = "192.168.1.1"
>
> def validate_ip4(address):
>     digits = address.split(".")
>     if len(digits) == 4:
>         for d in digits:
>             if int(d) < 0 or int(d) > 255:
>                   return False
>     return True
>

The OP wanted to "find" IP addresses -- unclear whether re.search or
re.match is required. Your solution doesn't address the search case.
For the match case, it needs some augmentation. It will fall apart if
presented with something like "..." or "comp.lang.python.announce". AND
while I'm at it ... in the event of a valid string of digits, it will
evaluate int(d) twice, rather unnecessarily & uglily.

So: match case:

! for s in strings_possibly_containing_digits:
! #   if not(s.isdigit() and 0 <= int(s) <= 255): # prettier, but test
on zero is now redundant
!     if not s.isdigit() or int(s) > 255:

and the search case: DON'T dump re; it can find highly probable
candidates (using a regexp like the OP's original or yours) a damn
sight faster than anything else this side of C or Pyrex. Then you
validate the result, with a cut-down validator that relies on the fact
that there are 4 segments and they contain only digits:

! # no need to test length == 4
! for s in address.split('.'):
!     if int(s) > 255:

HTH,
John



From vegeta.z at gmail.com  Wed Feb  9 12:27:34 2005
From: vegeta.z at gmail.com (vegetax)
Date: Wed, 09 Feb 2005 13:27:34 -0400
Subject: wrapper classes question..
Message-ID: <cudv50$e3m$1@sea.gmane.org>


Hi i made a wrapper class for handling file and dir operations and i wonder,
?whats?the?performance?penalty?for?making?such?wrapper?classes??is it ok to
make a lot of these wrappers? here?it?is:

#################
import os

class File(object):

????#access?modes
????F_OK?=?os.F_OK,
????W_OK?=?os.W_OK,
????R_OK?=?os.R_OK,
????X_OK?=?os.X_OK
?????
????????
????def?__init__(s,pathToFile):

?s.path?=?pathToFile
?s.name?=?os.path.basename(s.path)
?s.dirName?=?os.path.dirname(s.path)
?#s.size?=?path.getsize(s.path)

????
????def?size(s):
?return?os.path.getsize(s.path)
????
????def?open(s,mode='r'):
?return?open(s.path,mode)

????def?openw(s):
?return?open(s.path,'w')

????def?access(s,mode):
?return?os.access(s.path,mode)
????
????def?abspath(s):
?return?os.path.abspath(s.path)

????def?getatime(s):
?return?os.path.getatime(s.path)
????
????def?getctime(s):
?return?os.path.getctime(s.path)
????
????def?isabs(s):
?return?os.path.isabs(s.path)

????def?isfile(s):
?return?os.path.isfile(s.path)

????def?isdir(s):
?return?os.path.isdir(s.path)

????def?ext(s):
?return?os.path.splitext(s.path)[1]

????def?stat(s):
?return?os.stat(s.path)
????
????def?access(s,mode):
?return?os.access(s.path,mode)

def chdir(path) : os.chdir(path)

def cwd() : return os.getcwd()

def chmod(path,mode): return os.chmod(path,mode)

def chown(path,uid,gid): os.chown(path,uid,gid)

def ln(src,dest): os.symlink(src,dest)

def ls(path): return os.listdir(path)

def mkdir(path,rec=False,mode = 0777) : 
????if?not?rec:
????????os.mkdir(path,mode)
????else:
?os.makedirs(path,mode)

def rm(path):????os.remove(path)

def rename(old,new): os.rename(old,new)

def rmdir(path): os.rmdir(path)

def xremove(path) : 
????'just?unix'
????os.system('rm?-rf?%s'?%?path)

def utime(path,times=None):
????'set?times?of?a?file\
????times?=?tuple?like?(atime,ctime)?'
????os.utime(path,times)

if __name__ == '__main__':
????
????f?=?File('/tmp')
????print?f.isfile()
????print?f.isdir()
????print?f.size()
????print?ls('/tmp')



From deetsNOSPAM at web.de  Fri Feb 25 07:54:33 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 25 Feb 2005 13:54:33 +0100
Subject: Vectors in Visual Python
References: <1107944975.498403.225950@f14g2000cwb.googlegroups.com>
	<pbvj01tiob4v5i6usnkr08j10s9koeh5kn@4ax.com>
	<1grqqa2.1cnkkbv1l5mrrxN%aleaxit@yahoo.com>
	<isdl015rjvuf7o8gs6ig895m0npefj4aos@4ax.com>
	<1grrgt7.rje1681dh98itN%aleaxit@yahoo.com>
	<ovjm01pk59rahm7hilhgrddg560e6oe3h9@4ax.com>
	<1109265003.912263.291520@o13g2000cwo.googlegroups.com>
Message-ID: <388ld3F5ftditU1@individual.net>

FLChamp wrote:

> If anything was addressed to my problem then it has completely passed
> me by as most points were clearly made by a computer scientist and I am
> not one of those in the slightest. My experience of using any type of
> programming language is limited to the little we are taught in my
> non-computing subject and hence I have no idea what the below is all
> about!! In future example code may be more useful to help newbies like
> me :)

I think it has been addressed, by Art:

"""
My understanding:

is that VPython "vectors" are in effect flat 3 element Numeric arrays,
and Numeric ararys can be constructed with Float64 specified as the
datatype.
"""

It was embedded in some disgressing comments (he himself says so, btw.) so
you might have missed it.

-- 
Regards,

Diez B. Roggisch


From deetsNOSPAM at web.de  Fri Feb 11 08:12:15 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 11 Feb 2005 14:12:15 +0100
Subject: Is this a bug? BOM decoded with UTF8
References: <epMOd.357$7m.215@read3.inet.fi>
	<420bc317$0$4925$9b622d9e@news.freenet.de>
	<KT1Pd.641$gz1.258@read3.inet.fi>
Message-ID: <373p8vF57039vU1@individual.net>

> I know its easy (string.replace()) but why does UTF-16 do
> it on its own then? Is that according to Unicode standard or just
> Python convention?

BOM is microsoft-proprietary crap. UTF-16 is defined in the unicode
standard.
-- 
Regards,

Diez B. Roggisch


From brown at esteem.com  Wed Feb  9 18:51:06 2005
From: brown at esteem.com (Tom Brown)
Date: Wed, 9 Feb 2005 15:51:06 -0800
Subject: win32 service and sockets
In-Reply-To: <uy8dxin85.fsf@fitlinxx.com>
References: <200502081641.37483.brown@esteem.com>
	<mailman.2257.1107969537.22381.python-list@python.org>
	<uy8dxin85.fsf@fitlinxx.com>
Message-ID: <200502091551.06517.brown@esteem.com>

On Wednesday 09 February 2005 10:48, David Bolen wrote:
> Tom Brown <brown at esteem.com> writes:
> > Well, I have found that it works if I launch the client on the same
> > machine as the service. It will not work from a remote machine. Any
> > ideas?
>
> Since you mentioned Xp, could any of it's built-in firewall support be
> enabled, and perhaps blocking access to your server's port?
>

David,

That was it. It was the built-in firewall that was getting me.

Thanks!
Tom


From fredrik at pythonware.com  Tue Feb  8 09:58:18 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 15:58:18 +0100
Subject: Loop in list.
References: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
Message-ID: <cuajvm$4in$1@sea.gmane.org>

"Jim" <jtp11 at att.net> wrote:

> Where did this type of structure come from:
>
> mat = ['a' for i in range(3)]    ?
>
> This will produce a list of three elements but
> I don't see reference for it in any of the books.

it's called "list comprehension", and was added in Python 2.0.

    http://www.amk.ca/python/2.0/index.html#SECTION000600000000000000000
    http://docs.python.org/tut/node7.html#SECTION007140000000000000000
    http://docs.python.org/ref/lists.html

Python 2.4 introduces a variation called "generator expressions":

    http://www.python.org/doc/2.4/whatsnew/node4.html
    http://www.python.org/peps/pep-0289.html
    http://docs.python.org/ref/genexpr.html

</F> 





From kra at monkey.org  Tue Feb 22 17:47:27 2005
From: kra at monkey.org (Karl Anderson)
Date: 22 Feb 2005 14:47:27 -0800
Subject: lambda closure question
In-Reply-To: "Ted Lilley"'s message of "18 Feb 2005 23:42:31 -0800"
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
Message-ID: <m3fyzoky9s.fsf@localhost.localdomain>

"Ted Lilley" <ted.lilley at gmail.com> writes:

> What I want to do is pre-load functions with arguments by iterating
> through a list like so:
> 
> >>>class myclass:
> ...    pass
> >>>def func(self, arg):
> ...    print arg
> >>>mylist = ["my", "sample", "list"]
> >>>for item in mylist:
> ...    setattr(myclass, item, lamdba self: func(self, item))

I just found myself doing something similar to deal with unittest.py's
test loaders/runners, which have to be able to find attributes on a
class before the class is instantiated.

def addItemStateTransTest(klass):
    """
    For each item generator and transition test, add a method to klass
    to test that combo.
    """
    for ig_name in klass.item_generators:
       for tt_name in klass.transition_tests.keys():
           test_name = "test" + ig_name + tt_name
           test_fun = (lambda self,
                       ig_name=ig_name, tt_name=tt_name:
                       self.doTestItemStateTrans(ig_name, tt_name))
           setattr(klass, test_name, test_fun)

-- 
Karl Anderson      kra at monkey.org           http://monkey.org/~kra/


From peter at somewhere.com  Thu Feb 10 17:16:38 2005
From: peter at somewhere.com (Peter Maas)
Date: Thu, 10 Feb 2005 23:16:38 +0100
Subject: sre is broken in SuSE 9.2
In-Reply-To: <1108060527.378911.146240@o13g2000cwo.googlegroups.com>
References: <mailman.2299.1108029731.22381.python-list@python.org>
	<1108060527.378911.146240@o13g2000cwo.googlegroups.com>
Message-ID: <cugc2v$i8u$1@swifty.westend.com>

Serge Orlov schrieb:
> Denis S. Otkidach wrote:
> To summarize the discussion: either it's a bug in glibc or there is an
> option to specify modern POSIX locale. POSIX locale consist of
> characters from the portable character set, unicode is certainly
> portable. 

What about the environment variable LANG? I have SuSE 9.1 and
LANG = de_DE.UTF-8. Your example is running well on my computer.

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From eddie at holyrood.ed.ac.uk  Mon Feb  7 13:28:35 2005
From: eddie at holyrood.ed.ac.uk (Eddie Corns)
Date: Mon, 7 Feb 2005 18:28:35 +0000 (UTC)
Subject: Tar module issue
References: <mailman.2060.1107775422.22381.python-list@python.org>
	<cu7or0$470$1@pump1.york.ac.uk>
	<mailman.2080.1107794394.22381.python-list@python.org>
Message-ID: <cu8c0j$eo4$1@scotsman.ed.ac.uk>

I don't have the original query any more but I think your problem is related
to mixing absolute and relative file paths.  That is the filenames themselves,
I think I recall in your original message you were mixing up the idea of
global variables in your code versus the filenames stored in the TAR archive.

When tar restores files it will either be doing them as relative paths
(directory + filename) or absolute paths, I think relative is the default.
This is relative to where you are now when you extract NOT where you were when
you archived them.  I think there may be extra confusion to do with the way
tar stores hard links  What might be happening is that some paths are actually
links to other files, you would need to figure out how tar is dealing with
this - is it converting links back to relative paths (unlikely I suspect)?
Either way it might be trying to create a link to a file that either doesn't
exist on the system you are restoring to or not from the directory where you
now are.

I hope that makes sense.

Eddie


From jfj at freemail.gr  Mon Feb 14 17:40:44 2005
From: jfj at freemail.gr (jfj)
Date: Mon, 14 Feb 2005 14:40:44 -0800
Subject: [newbie] Confused with raise w/o args
In-Reply-To: <mailman.2523.1108381045.22381.python-list@python.org>
References: <mailman.2523.1108381045.22381.python-list@python.org>
Message-ID: <421128EC.5080108@freemail.gr>

jfj wrote:
> IMHO, a more clean operation of raise would be either:
>   1) raise w/o args allowed *only* inside an except clause to
>      re-raise the exception being handled by the clause.

Wait! second that. We would like to

###############
def bar():
      raise

def b5():
     try:
         raise A
     except:
         bar ()
#################

So, restricting raise into except clauses only, is not good.
Change the proposal to:
 >   1) raise w/o args re-raises the exception being handled
 >      or UnhandledException.

here is another confusing case:

###################
import sys

class A:
  pass

class B:
  pass

def foo ():
     try:
	raise B
     except:
	pass
     raise


def b1():
  try:
    raise A
  except:
    foo()

try:
     b1 ()
except:
     print sys.exc_info()[0]
##################

This reports that __main__.B is raised but wouldn't it be better
to raise an 'A' since this is the currently handled exception?

jf



From psn at compsoc.dur.ac.uk  Thu Feb  3 06:50:21 2005
From: psn at compsoc.dur.ac.uk (Peter Nuttall)
Date: Thu, 3 Feb 2005 11:50:21 +0000
Subject: Basic file operation questions
In-Reply-To: <opsllt9r191js0xs@news.telkomsa.net>
References: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
	<opsllt9r191js0xs@news.telkomsa.net>
Message-ID: <20050203115021.GB23999@compsoc.dur.ac.uk>

On Wed, Feb 02, 2005 at 11:47:41PM -0500, Caleb Hattingh wrote:
> Hi Alex
> 
> Assuming you have a file called "data.txt":
> 
> ***
> f = open('data.txt','r')
> lines = f.readlines()
> f.close()
> for line in lines:
>     print line
> ***
>

Can you not write this:

f=open("data.txt", "r")
for line in f.readlines():
	#do stuff to line
f.close()

Pete


From mailer at pymailer.com  Tue Feb  8 12:07:28 2005
From: mailer at pymailer.com (Mailer)
Date: Wed, 9 Feb 2005 01:07:28 +0800
Subject: Python mail filter 
Message-ID: <4208f1d0$1@news.starhub.net.sg>

Hello, all,

Well, I need to write a mail filter in Python. The filter will be used in
shared web hosting environment, so the control over MTA configuration etc is
limited.

The basic premise, as I understand is this:

Read mail from stdin
Parse headers etc using rfc822 or email module
Process

# Now I need to do one of the following:

# Discard mail
# Pass through
# Forward to another account, possibly modifying the mail

Now that I have coded up some stuff, the first looks easy - mails are
getting lost. So the question is (may not be entirely specific to Python),
how do I achieve the other two?

Currently, I have set up a .forward that pipes the mail to my script. I can
verify that this works by dumping the contents to a file. If I write to
stdout, however, the mail is not delivered. That doesn't quite look right
either - it's probably too late for the MTA to pick up. What I want to do is
to pass the processed mail back to Postfix so it can deliver it to the
correct local mail box.

FYI, the setup is Sendmail/Postfix.

(P.S. I am very much aware of the existence of procmail, TMDA etc. My
requirements are very specific and requires integration with another
program, so I am only interested in getting a custom solution).

TIA,
Mika




From mediocre_person at hotmail.com  Wed Feb  2 19:40:56 2005
From: mediocre_person at hotmail.com (Nick)
Date: Wed, 02 Feb 2005 18:40:56 -0600
Subject: Finding user's home dir
In-Reply-To: <5i9rtc.rq31.ln@orion.homeinvalid>
References: <5i9rtc.rq31.ln@orion.homeinvalid>
Message-ID: <42017300$1_4@alt.athenanews.com>

Python 2.4 (#1, Jan  1 2005, 21:33:55)
[GCC 3.3.4] on linux2
Slackware 10 Current

Works! Nice.


From duncan.booth at invalid.invalid  Mon Feb 21 08:13:04 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 21 Feb 2005 13:13:04 GMT
Subject: lambda closure question
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
	<slrnd1jjo4.jkb.apardon@rcpc42.vub.ac.be>
	<mailman.2891.1108988864.22381.python-list@python.org>
	<slrnd1jlne.jkb.apardon@rcpc42.vub.ac.be>
Message-ID: <Xns96048671A7BADduncanrcpcouk@127.0.0.1>

Antoon Pardon wrote:

> But I'll get back at what seems you actually wanted to say:
> That there is no way to rebind 'x' or in my case 'l' and
> with that I have to agree although I personnaly find that
> a lack in python

'no way' is a bit strong. You can use hacks such as the one I posted a 
couple of weeks back:

>>> import hack
>>> def F():
	l = 'hello there'
	def get():
		return l
	return hack.mksetter(lambda: l), get

>>> set, get = F()
>>> get()
'hello there'
>>> set('testing')
'testing'
>>> get()
'testing'

'no official, supported, or portable way' would be more accurate.

I've never actually felt the need to set variables from inside a nested 
function, and I wouldn't use a hack like this in production code unless 
there was a *very* good reason for it, but since I figured out how to 
actually do it I'm suprised just how many things could actually be 
simplified if there was an official way to do this.


From Florian.Lindner at xgm.de  Sun Feb 27 13:10:03 2005
From: Florian.Lindner at xgm.de (Florian Lindner)
Date: 27 Feb 2005 10:10:03 -0800
Subject: Lib for RSS/Atom parsing
Message-ID: <7eb83f4a.0502271010.1cb40fa1@posting.google.com>

Hello,
what is a good python library for parsing of RSS and/or Atom feeds. It
should be able to handle most of the common protocols.
Thanks,

Florian


From aurora00 at gmail.com  Fri Feb 18 18:56:41 2005
From: aurora00 at gmail.com (aurora)
Date: Fri, 18 Feb 2005 15:56:41 -0800
Subject: unicode encoding usablilty problem
References: <opsmekm2ei6yt6e7@news.cisco.com>	<mailman.2811.1108751132.22381.python-list@python.org>
	<opsmepfmcx6yt6e7@news.cisco.com>
	<mailman.2813.1108754311.22381.python-list@python.org>
Message-ID: <opsme3grw86yt6e7@news.cisco.com>

On Fri, 18 Feb 2005 20:18:28 +0100, Walter D?rwald <walter at livinglogic.de>  
wrote:

> aurora wrote:
>
>  > [...]
>> In Java they are distinct data type and the compiler would catch all   
>> incorrect usage. In Python, the interpreter seems to 'help' us to  
>> promote  binary string to unicode. Things works fine, unit tests pass,  
>> all until  the first non-ASCII characters come in and then the program  
>> breaks.
>>  Is there a scheme for Python developer to use so that they are safe  
>> from  incorrect mixing?
>
> Put the following:
>
> import sys
> sys.setdefaultencoding("undefined")
>
> in a file named sitecustomize.py somewhere in your Python path and
> Python will complain whenever there's an implicit conversion between
> str and unicode.
>
> HTH,
>     Walter D?rwald

That helps! Running unit test caught quite a few potential problems (as  
well as a lot of safe of ASCII string promotion).


From fredrik at pythonware.com  Tue Feb  1 01:58:21 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 1 Feb 2005 07:58:21 +0100
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org><1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com><1107188359.375703.110590@f14g2000cwb.googlegroups.com><1gr9lyc.1rrm543162uefN%aleaxit@yahoo.com>
	<1107213835.138613.117620@c13g2000cwb.googlegroups.com>
Message-ID: <ctn99d$74f$1@sea.gmane.org>

Michael Tobis wrote:

> This is definitely a wart:
>
> ... z = 42.3
> ...
> ... def f():
> ...    if False:
> ...       global z
> ...    z = -666
> ...
> ... f()
> ... print z

no, it's a declaration.  from the documentation:

    http://docs.python.org/ref/global.html

    "The global statement is a declaration which holds for the entire
    current code block."

    "the global is a directive to the parser. It applies only to code
    parsed at the same time as the global statement"

</F> 





From tmj at SPAMLESSjarmania.com  Fri Feb 11 08:34:25 2005
From: tmj at SPAMLESSjarmania.com (Tim Jarman)
Date: Fri, 11 Feb 2005 13:34:25 +0000
Subject: PyQt documentation
References: <1108088253.552834.44690@z14g2000cwz.googlegroups.com>
Message-ID: <373qj1F58q62aU1@individual.net>

Eric Jardim wrote:

> Hi,
> 
> Is there any site that gather all the documentation about PyQt?
> 
> The docs of the Riverbank site is poor, and I have found separate
> tutorials on the net.
> 

Check out http://www.opendocs.org/pyqt/

> I know that the Kompany have made a "Qtdoc"-like to PyQt. But it is not
> free doc.
> 
> Does anybody know anything about any project for making PyQt
> development more easy?
>

Someone else already referred you to the excellent Eric IDE.
 
> thanks,
> 
> [Eric Jardim]

-- 
Website: www DOT jarmania FULLSTOP com


From reinhold-birkenfeld-nospam at wolke7.net  Sun Feb  6 05:15:52 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Sun, 06 Feb 2005 11:15:52 +0100
Subject: How do I convert arithemtic string (like "2+2") to a number?
In-Reply-To: <1107674970.152776.164170@c13g2000cwb.googlegroups.com>
References: <mailman.1996.1107640917.22381.python-list@python.org>
	<1107641467.104883.177850@c13g2000cwb.googlegroups.com>
	<mailman.2010.1107673611.22381.python-list@python.org>
	<1107674970.152776.164170@c13g2000cwb.googlegroups.com>
Message-ID: <36m92pF52msqlU1@individual.net>

Michael Hartl wrote:
> Adam brings up a good point: eval is a very general function which
> evaluates an arbitrary Python expression.  As a result, it (and its
> close cousin exec) should be used with caution if security is an issue.

To get a secure eval for simple mathematical expressions, it should
suffice to check the string in the following way:

It does not contain characters other than operators, numbers, dots and
parentheses (perhaps you want to allow 'e' for floats, but you should
make sure that the 'e' is surrounded by numbers or optionally followed
by a +/- sign).

If you want to go a step further, you could parse the string to eval
with the parser/tokenize/... modules and verify the parse tree that it
contains nothing except operators and numbers.

Reinhold


From fredrik at pythonware.com  Mon Feb 14 09:20:32 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 15:20:32 +0100
Subject: safest way to open files on all platforms
References: <cuqbo6$hp6$1@solaris.cc.vt.edu>
Message-ID: <cuqbv4$ukc$1@sea.gmane.org>

"rbt" wrote:

>I believe that this is the safest way to open files on Windows, Linux, Mac and Unix, but I wanted 
>to ask here just to be sure:
>
> fp = file('filename', 'rb')
>
> The 'b' on the end being the most important ingredient (especially on Windows as a simple 'r' on a 
> binary file might cause some sort of corruption).
>
> Anyway, am I right in saying this? That 'rb' is the safest way to open files for reading and that 
> it should work well on *all* Python supported platforms?

"rb" works on all platforms, yes.  but it doesn't work well if you're reading a text file.

(when reading text files, the "U" option may also be useful.  see doc for details)

</F> 





From fredrik at pythonware.com  Tue Feb 15 02:14:58 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 15 Feb 2005 08:14:58 +0100
Subject: regular expression question
References: <mailman.2598.1108429453.22381.python-list@python.org>
	<42115020$0$15705$626a14ce@news.free.fr>
Message-ID: <cus7cc$9ai$1@sea.gmane.org>

Bruno Desthuilliers wrote:

>> match = STX + '(.*)' + ETX
>>
>> # Example 1
>> # This appears to work, but I'm not sure if the '+' is being used in
>> the regular expression, or if it's just joining STX, '(.*)', and ETX.
>>
>> if re.search(STX + '(.*)' + ETX,data):
>>   print "Matches"
>>
>> # Example 2
>> # This also appears to work
>> if re.search(match,data):
>>   print "Matches"

> You may want something like:
> if re.search('%s(.*)%s' % (STX, ETX), data):
>   ...

that's of course the same thing as examples 1 and 2.

a tip to the original poster: if you're not sure what an expression does,
try printing the result.  use "print repr(v)" if the value may contain odd
characters.  try adding this to your test script:

    print repr(match)
    print repr(STX + '(.*)' + ETX)
    print repr('%s(.*)%s' % (STX, ETX))

</F> 





From franz.steinhaeusler at utanet.at  Fri Feb 25 06:16:40 2005
From: franz.steinhaeusler at utanet.at (Franz Steinhaeusler)
Date: Fri, 25 Feb 2005 12:16:40 +0100
Subject: wanted: C++ parser written in Python
References: <mukr11t39khpd8od53im9jic3s6qjcl3j2@4ax.com>
	<3881hvF5jg6qrU1@individual.net>
	<91ut11pi7s6acj2pthj2crnh6n96o6raqs@4ax.com>
	<du7k6ow7wle.fsf@amadeus.cc.tut.fi>
Message-ID: <ev1u111chcfetcf9dudfr41n26l5q7t3se@4ax.com>

On 25 Feb 2005 12:38:53 +0200, Ville Vainio <ville at spammers.com> wrote:

Hello Ville,

>>>>>> "Franz" == Franz Steinhaeusler <franz.steinhaeusler at utanet.at> writes:
>
>    Franz> Thank you, but it is too big.
>
>    Franz> Anyway:
>
>    Franz> I'm looking for some (simple) "rules" to parse (regex) and
>    Franz> try to implement myself, if nothing is available.
>
>Check out
>
>http://pyparsing.sourceforge.net/

Thank you for this information!

Also a little to complicated, I'm looking for 
a quick solution.

>
>Before you start implementing one yourself. Regexp solution would
>probably be a bit flakier. And do share your results when you get
>some; I'm in need of a c++ parser myself.

I don't want to scan a whole project,
only the currently open file.

class definition
method/function
ignore comment lines
show #includes would be enough at first.


I will inform again :)

-- 
Franz Steinhaeusler


From steve at holdenweb.com  Wed Feb  2 18:41:10 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 02 Feb 2005 18:41:10 -0500
Subject: Newbie alert
In-Reply-To: <mailman.1781.1107387840.22381.python-list@python.org>
References: <mailman.1781.1107387840.22381.python-list@python.org>
Message-ID: <yDdMd.102652$Jk5.15197@lakeread01>

Valone, Toren W. wrote:

> Ok, new to Python and Tkinter.. Following along examples in book, got to
> dialog windows example coded this
> 
> # dialog1.py
> 
> from Tkinter import *
> 
> class Mydialog:
         ^^^^^^^^
> 
[...]
> 
> d = MyDialog(root)
       ^^^^^^^^
> 
> root.wait_window(d.top)               
> 
> When I run it IDLE 
> 
> gives me this
> 
> Traceback (most recent call last):
>   File "C:/Python24/dialog1.py", line 29, in -toplevel-
>     d = MyDialog(root)
> NameError: name 'MyDialog' is not defined
> 
> I have a feeling this is something very simple, but I cannot figure it out.
> Help!

Python is case-sensitive!

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From trial at ugyvitelszolgaltato.hu  Sat Feb 26 00:32:32 2005
From: trial at ugyvitelszolgaltato.hu (Attila Szabo)
Date: Sat, 26 Feb 2005 06:32:32 +0100
Subject: strange SyntaxError
In-Reply-To: <421f39c7$1@nntp0.pdx.net>
References: <mailman.3044.1109338441.22381.python-list@python.org>
	<421f39c7$1@nntp0.pdx.net>
Message-ID: <20050226053232.GB27290@csola.ugyvitelszolgaltato.hu>

2005, Feb 25 -> Scott David Daniels wrote :
> Attila Szabo wrote:
> >Hi,
> >def main():
> >        lambda x: 'ABC%s' % str(x)
> >        for k in range(2): exec('print %s' % k)
> OK, to no real effect, in main you define an unnamed function that
> you can never reference.  Pretty silly, but I'll bite.

This code was simplified, the lambda was part of a map,
and the exec line is different too, I just wrote
this to picture the situation, but it's ok now...
At first I was surprised, but I read a bit and it's clear now...

Thanks
--

A t t i l a :: trial at ugyvitelszolgaltato.hu :: S z a b o


From VBoycheva at jea.net  Fri Feb  4 15:19:55 2005
From: VBoycheva at jea.net (Valentina Boycheva)
Date: Fri, 4 Feb 2005 15:19:55 -0500 
Subject: executing VBScript from Python and vice versa
Message-ID: <51B182D9911B914EA2243227834E86C005CB075D@jeamail.jea.net>

Is there a way to make programs written in these two languages communicate
with each other? I am pretty sure that VBScript can access a Python script
because Python is COM compliant. On the other hand, Python might be able to
call a VBScript through WSH. Can somebody provide a simple example? I have
exactly 4 days of experience in Python (and fortunately, much more in VB6)

Thanks.



From bvande at po-box.mcgill.ca  Fri Feb  4 19:10:34 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Fri, 04 Feb 2005 19:10:34 -0500
Subject: [noob] Error!
In-Reply-To: <614c778e.0502041459.39da55c1@posting.google.com>
References: <614c778e.0502041459.39da55c1@posting.google.com>
Message-ID: <42040EFA.9020802@po-box.mcgill.ca>

administrata said unto the world upon 2005-02-04 17:59:
> I'm programming Car Salesman Program.
> It's been "3 days" learning python...
> But, i got problem
> 
> 
> Write a Car Salesman program where the user enters the base price of a
> car. The program should add on a bunch of extra fees such as tax,
> license, dealer prep, and destination charge. Make tax and license a
> percent of the base price. The other fees should be set values.
> Display the actual price of the car once all the extras are applied.
 >
> print "CAR SALESMAN PROGRAM"
> print "\nEnter data."
> base_price = int(raw_input("Base Price: "))
> 
> tax = int(raw_input("/nTax: "))
> license1 = int(raw_input("License: "))
> dealer = 30
> charge = 5
> print "Dealer Prep: ", dealer
> print "Destination Charge: ", charge
> 
> actual_price = (((base_price * tax / 100) + license1 / 100) + dealer +
> change
> print "\n\nActual price: ", actual_price
> 
> raw_input("")
> 
> error occurs, i think the problem is in actual_price. but,
> I don't know how to comebine percentage and raw_input.
> help me...
> 
> thx 4 reading... :)

Hi,

a couple of general tips for seeking help:

1) "error occurs" isn't helpful. What's the error? How do you know? Is 
it that you don't get the expected output? Then show what you get and 
say what you expected. Is it that you get a traceback giving detailed 
and helpful information to track down the error? Then include those 
details in your post. (They might not make sense to you, but they will 
help helpers help you.)

2) This smells like a homework problem. If it is, say so. That way, no 
one will think you are trying to get someone to do your homework for 
you, and will be much more receptive to request for a push in the 
right direction.

Looking at the line:

actual_price = (((base_price * tax / 100) + license1 / 100) + dealer + 
change

I see you've 3 '('s, but only 2 ')'s.

Also, because of point (1), I cannot know if this is relevant to your 
sense that there is an error, but in:

(base_price * tax / 100)

you might try changing 100 to 100.0. Run these through the interpreter:
1 / 10
1 / 10.0
and consult the FAQ on www.python.org for an explanation of the 
difference.

Best,

Brian vdB



From grante at visi.com  Thu Feb 10 14:48:11 2005
From: grante at visi.com (Grant Edwards)
Date: 10 Feb 2005 19:48:11 GMT
Subject: [N00B] What's %?
References: <614c778e.0502100938.6665cb52@posting.google.com>
	<420b9dc1$0$29504$a1866201@visi.com>
	<rs6dnX6Htfz3JJbfRVn-vg@powergate.ca>
Message-ID: <420bba7b$0$29476$a1866201@visi.com>

On 2005-02-10, Peter Hansen <peter at engcorp.com> wrote:
> Grant Edwards wrote:
>> It's the modulus operator.  It returns the remainder of integer
>> division.  As we used to say in second grade:
>> 
>>  4 goes into 107 26 times with 3 left over.
>> 
>>  3 goes into 4 2 times with 1 left over. 
>
> How long were you stuck in second grade, Grant?  <grin>

What? 50% wasn't a passing grade when you were in 2nd grade?

> P.S.  You're correct, for large values of four.... ;-)

and for small values of 3.

-- 
Grant Edwards                   grante             Yow!  I'm a GENIUS! I
                                  at               want to dispute sentence
                               visi.com            structure with SUSAN
                                                   SONTAG!!


From wenshengwang at gmail.com  Wed Feb 16 12:47:47 2005
From: wenshengwang at gmail.com (Wensheng)
Date: 16 Feb 2005 09:47:47 -0800
Subject: Loading functions from a file during run-time
References: <1108091598.055004.24890@g14g2000cwa.googlegroups.com>
Message-ID: <1108576067.140194.115620@c13g2000cwb.googlegroups.com>

#--- file bar.py
def negate(n):
	return -n

def square(n):
	return n*n
#--- end bar.py

>>> foo="bar"
>>> fs=__import__(foo)
>>> import types
>>> f=[a for a in dir(fs) if a[0:2]!='__' and
type(getattr(fs,a))==types.FunctionType]
>>> f
['negate', 'square']
>>> n=5
>>> exec("print fs."+f[0]+"(n)")
-5
>>> exec("print fs."+f[1]+"(n)")
25


Isn't the problem solved?



From vincent at visualtrans.de  Sun Feb  6 07:22:10 2005
From: vincent at visualtrans.de (vincent wehren)
Date: Sun, 06 Feb 2005 13:22:10 +0100
Subject: Multiple constructors
In-Reply-To: <36m98tF52msqlU2@individual.net>
References: <6SjNd.38337$K7.21639@fe2.news.blueyonder.co.uk>
	<cu4ka0$72c$1@news2.tilbu1.nb.home.nl>
	<36m98tF52msqlU2@individual.net>
Message-ID: <cu525h$t12$1@news2.tilbu1.nb.home.nl>

Reinhold Birkenfeld wrote:
> vincent wehren wrote:
> 
>>Philip Smith wrote:
>>
>>>Call this a C++ programmers hang-up if you like.
>>>
>>>I don't seem to be able to define multiple versions of __init__ in my matrix 
>>>class (ie to initialise either from a list of values or from 2 dimensions 
>>>(rows/columns)).
>>>
>>>Even if Python couldn't resolve the __init__ to use on the basis of argument 
>>>types surely it could do so on the basis of argument numbers???
>>>
>>>At any rate - any suggestions how I code this????
>>
>>Checking the number of arguments ain't all that hard:
>>
>>class Klass:
>>    def __init__(*args):
>>        self.args = args
>>        if len(self.args) == 1:
>>            # etc.
>>
>>This feels rather unpythonic, though. 
> 
> 
> And it won't work, as `self' is not defined. ;)

You're right of course!

Note to self: Must stop shooting from the hip ;)


--
Vincent




> 
> Reinhold


From martin at v.loewis.de  Wed Feb 23 16:08:44 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 23 Feb 2005 22:08:44 +0100
Subject: LC_ALL and os.listdir()
In-Reply-To: <mailman.2975.1109182132.22381.python-list@python.org>
References: <20050223070348.GA7565@skyjammer.com>
	<mailman.2975.1109182132.22381.python-list@python.org>
Message-ID: <421CF0DC.5030007@v.loewis.de>

Kenneth Pronovici wrote:
> I think that I can solve my problem by just converting any unicode
> strings from configuration into utf-8 simple strings using encode().
> Using this solution, all of my existing regression tests still pass, and
> my code seems to make it past the unusual directory.

See my other post. UTF-8 might be the wrong choice: the path might be
encoded as, say, ISO-8859-1 on disk, in which case an UTF-8-encoded
path would not be found.

Regards,
Martin


From removethis.kartic.krishnamurthy at gmail.com  Thu Feb 24 22:05:28 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Fri, 25 Feb 2005 03:05:28 GMT
Subject: Python Online Programming Contest
In-Reply-To: <1109295016.597170.21350@o13g2000cwo.googlegroups.com>
References: <1109278779.955986.193860@z14g2000cwz.googlegroups.com>
	<1109283053.971905.27670@z14g2000cwz.googlegroups.com>
	<1109295016.597170.21350@o13g2000cwo.googlegroups.com>
Message-ID: <YBwTd.38471$H05.20645@twister.nyroc.rr.com>

Harlin Seritt said the following on 2/24/2005 8:30 PM:
> Actually MIT is an abbreviation and not an acronym in the true sense of
> the word :)
> 

Yes...I was caught unawares by the previous poster. But in a strange way 
  I was using the abbreviation MIT to talk about the acronym MIT (M* 
Institute of Technology) :-D


From jerf at jerf.org  Wed Feb  9 20:01:03 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Wed, 09 Feb 2005 20:01:03 -0500
Subject: Testing conditions.
References: <cues7q$mg7$1@news7.svr.pol.co.uk>
Message-ID: <pan.2005.02.10.01.01.02.650691@jerf.org>

On Thu, 10 Feb 2005 05:38:54 +0000, Ray Gibbon wrote:
> e.g. 2
> |    while new_data, environment = get_more_data(source):
> |        process_data(new_data, environment)
> 
> is something I'm equally likely to want to do, but I can't express it's
> meaning.

I think we'd usually phrase that as 

for new_data, environment in data(source):
	process_data(new_data, environment)

and if data(source) isn't already an iterator of one form or another (a
list, a generator, etc.), you can easily write it to be one; most of the
time it already is.

I use while, but much, much more rarely than for, even for things I'd
write as "while" in other languages, and the majority of the "while"s are
infinite generators, e.g.:

def counter():
  i = 0
  while True:
    yield i
    i += 1



From dickey at saltmine.radix.net  Sun Feb 27 06:51:29 2005
From: dickey at saltmine.radix.net (Thomas Dickey)
Date: Sun, 27 Feb 2005 11:51:29 -0000
Subject: Converting HTML to ASCII
References: <mailman.3066.1109357511.22381.python-list@python.org>
	<slrnd1v5vv.nhu.jgrahn-nntq@frailea.sa.invalid>
	<7xk6ovbob4.fsf@ruckus.brouhaha.com>
	<42212cd7$0$44617$a1866201@visi.com>
Message-ID: <1123d219gti4df7@corp.supernews.com>

Grant Edwards <grante at visi.com> wrote:
> First, make it work.  Then make it work right.  Then worry
> about how fast it is.  

> "Premature optimization..."

That could be - but then again, most of the comments I've seen for that
particular issue are for rather old releases.

>> It seems to use a quadratic algorithm for remembering where
>> the links point, or something.  I wrote a very crude but very
>> fast renderer in C that I can post if someone wants it, which
>> is what I use for this purpose.

> If lynx really is too slow, try w3m or links.  Both do a better
> job of rendering anyway.

They lay out tables more/less as expected (though navigation in tables
for links seems to be an afterthought).

-- 
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net


From fredrik at pythonware.com  Tue Feb  8 04:01:51 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 10:01:51 +0100
Subject: Big development in the GUI realm
References: <200502072347.j17NlPnh012281@mail07.syd.optusnet.com.au>
Message-ID: <cu9v2s$5eq$1@sea.gmane.org>

Tim Churches wrote:

>> and how exactly are you going to load a DLL from an EXE file with-
>> out "mixing, including, or combining" the two?
>
> You can't, but as long as that "mixing, including, or combining" only occurs at runtime,
> the GPL itself specifically says that is out of scope and the GPL does not apply. Their
> words, not mine - to quote (yet again):
>
> "Activities other than copying, distribution and modification are not covered by this
> License; they are outside its scope. The act of running the Program is not restricted,..."

except that if *you* set things up so the code is combined when run, *you* are
copying, distributing, and/or modifying the program in order to mix, include and/or
combine your work with the GPL:ed work.

if you leave all that to the user, you're clear.

(relying on word games is a lousy legal strategy in most parts of the world)

</F> 





From xah at xahlee.org  Wed Feb 16 17:06:27 2005
From: xah at xahlee.org (Xah Lee)
Date: 16 Feb 2005 14:06:27 -0800
Subject: [perl-python] problem: reducing comparison (erratum)
In-Reply-To: <1108471704.220626.27530@g14g2000cwa.googlegroups.com>
References: <1108450348.253772.158120@z14g2000cwz.googlegroups.com>
	<1108471704.220626.27530@g14g2000cwa.googlegroups.com>
Message-ID: <1108591587.564859.281090@o13g2000cwo.googlegroups.com>

Xah Lee wrote:
> In imperative languages such as Perl and Python
> and Java, in general it is not safe to delete
> elements when looping thru a list-like entity.
> (it screws up the iteration) One must make a
> copy first, and work with the copy.

Correction:
When looping thru a list-like entity and delete elements in the vary
list, there's a question whether it will change the iteration. (For
example, if one loops thru 1 to 9, and deleted 8 while at 2, should the
loop still do 8?) For some languages and or list entities, the answer
may be yes or no. However, in imperative languages such as Perl and
Python and Java, often this is not allowed, justified as a protection
to safeguard programers as ignoramuses, but partially because the
internal issues of these languages. (These languages have molded a
generation of programers to question and discourse man-made issues.)

The work around in these languages is always to make a copy of the
list-entity, and work with the copy.

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From steven.bethard at gmail.com  Thu Feb  3 12:41:09 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 03 Feb 2005 10:41:09 -0700
Subject: global variables
In-Reply-To: <pqpMd.102688$Jk5.95091@lakeread01>
References: <1107385488.822768.317250@l41g2000cwc.googlegroups.com>
	<1107388493.465599.140480@g14g2000cwa.googlegroups.com>
	<3YSdnYVEmOCW8pzfRVn-sg@comcast.com>
	<1107391350.933650.321440@z14g2000cwz.googlegroups.com>
	<1107392092.290042.221600@c13g2000cwb.googlegroups.com>
	<pqpMd.102688$Jk5.95091@lakeread01>
Message-ID: <nrWdnRM9Q6Gu_5_fRVn-jw@comcast.com>

Steve Holden wrote:
> M.E.Farmer wrote:
> 
>> Ok it has been a long day,
>> In my reply to Steven Bethard , Steve should read Steven ;)
>>
>> M.E.Farmer
>>
> Well, since he signs himself "Steve" too I guess we'll just have to put 
> up with the ambiguities. Or perhaps, given my (lack of) typing skill, I 
> should just start signing myself "Stvev"?
> 
> regards
>  Steve

Or I can stop correcting it every time I type STeve[1]. ;)

STeve

[1] But of course, you probably do the same thing too. ;)


From kent37 at tds.net  Mon Feb 14 21:06:44 2005
From: kent37 at tds.net (Kent Johnson)
Date: Mon, 14 Feb 2005 21:06:44 -0500
Subject: Newbie help
In-Reply-To: <421152d0$1_1@newspeer2.tds.net>
References: <lvUPd.10137$pE1.923@bignews3.bellsouth.net>
	<mailman.2568.1108413446.22381.python-list@python.org>
	<Le8Qd.605$3b7.602@bignews3.bellsouth.net>
	<421152d0$1_1@newspeer2.tds.net>
Message-ID: <42115641$1_3@newspeer2.tds.net>

Kent Johnson wrote:
> You might be interested in the Python tutor mailing list which is 
> specifically intended for beginners.
> http://mail.python.org/mailman/listinfo/tutor

Ah, I don't mean to imply that this list is unfriendly to beginners, or that you are not welcome 
here! Just pointing out another resource.

Kent


From beliavsky at aol.com  Tue Feb  1 16:03:12 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 1 Feb 2005 13:03:12 -0800
Subject: How do you do arrays
References: <tbunce-0102051052450001@192.168.1.12>
	<1107284817.848551.79000@c13g2000cwb.googlegroups.com>
	<tbunce-0102051218150001@192.168.1.12>
	<JRRLd.132071$w62.80266@bgtnsc05-news.ops.worldnet.att.net>
Message-ID: <1107291792.287774.90620@z14g2000cwz.googlegroups.com>

wes weston wrote:
> Thomas,
>     If you were allowed to do what you're doing, the
> list first element would be getting skipped as "index"
> is always > 0. The thing is, you don't want the "index"
> var at all for adding to the list; just do jMatrix.append(k).
>     You can iterate over the list with
> for x in jMatrix:
>     print x
>
>     Is it basic that indexes from 1 vs. 0? 'just about
> completely forgotten basic.
> wes

I think most versions of Basic have arrays that by default start with
1, as did their ancestor, Fortran, although other lower bounds can be
specified. VB.NET, Microsoft's successor to Visual Basic, requires
arrays to start with zero.



From mahs at telcopartners.com  Tue Feb  8 14:44:25 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Tue, 08 Feb 2005 11:44:25 -0800
Subject: turing machine in an LC
In-Reply-To: <pan.2005.02.08.13.57.21.519105@jerf.org>
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>	<87mzuf9gu8.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>	<s9zvf93ovp8.fsf@salmakis.intevation.de>	<pan.2005.02.08.12.47.00.135408@jerf.org>	<mailman.2206.1107888580.22381.python-list@python.org>
	<pan.2005.02.08.13.57.21.519105@jerf.org>
Message-ID: <cub4o4$sgj$1@sea.gmane.org>

Jeremy Bowers wrote:

> 
> OK then, I still don't quite see how you can build a Turing Machine in one
> LC, but an LC and one preceding list assignment should be possible,
> although the resulting list from the LC is garbage; 

Not necessarily garbage - could be anything, say a copy of the results:

  >>> results = [0]
  >>> [(results.append(lastresult+1) or lastresult) for i, lastresult in 
it.izip(xrange(5),results)]
[0, 1, 2, 3, 4]
  >>> # ok, missing the 5, but close!

I don't think the assignment is avoidable though.

I should clarify a point I made earlier

> I see no difference between LCs and GEs in this respect:

What I meant was that both LCs and GEs can reference their prior state in the 
same way.  Of course, there is an important difference in that the LC returns 
its list as soon as it is executed whereas the executing the genexp returns an 
iterator that can delay the evaluation of all but the outer loop until its 
next() is called.  This makes a genexp equivalent to (at least some) functions, 
and perhaps that was part of your point that I missed.

Michael



From guettli at thomas-guettler.de  Thu Feb 17 09:30:19 2005
From: guettli at thomas-guettler.de (Thomas Guettler)
Date: Thu, 17 Feb 2005 15:30:19 +0100
Subject: Stable GUI
References: <c0e7fd79.0502160619.565eb40e@posting.google.com>
Message-ID: <pan.2005.02.17.14.30.19.63644@thomas-guettler.de>

Am Wed, 16 Feb 2005 06:19:27 -0800 schrieb Viktor:

> Which GUI is the most stable one? I don't need any fancy looking
> widgets (look and feel doesn't realy matter to me), I "just" need it
> to be rock stable and fast...

Hi,

For me pygtk is enough stable and fast.

The reference is good:
http://www.pygtk.org/pygtk2reference/index.html


 Thomas

-- 
Thomas G?ttler, http://www.thomas-guettler.de/




From mahs at telcopartners.com  Sun Feb 13 18:51:02 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sun, 13 Feb 2005 15:51:02 -0800
Subject: builtin functions for and and or?
In-Reply-To: <8xRPd.4678$ZZ.3668@newssvr23.news.prodigy.net>
References: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>	<37a2i0F58gsbsU1@individual.net>	<1108335152.338013.45530@z14g2000cwz.googlegroups.com>
	<8xRPd.4678$ZZ.3668@newssvr23.news.prodigy.net>
Message-ID: <cuoov9$2kr$1@sea.gmane.org>

Roose wrote:
> Yeah, as we can see there are a million ways to do it.  But none of them are
> as desirable as just having a library function to do the same thing.  I'd
> argue that since there are so many different ways, we should just collapse
> them into one: any() and all().  That is more in keeping with the python
> philosophy I suppose -- having one canonical way to do things.  Otherwise
> you could see any of these several ways of doing it in any program, and each
> time you have to make sure it's doing what you think.  Each of them requies
> more examination than is justified for such a trivial operation.  And this
> definitely hurts the readability of the program.
> 
> 
Previous discussion on this topic:
http://groups-beta.google.com/group/comp.lang.python/msg/a76b4c2caf6c435c

Michael



From bdesth.quelquechose at free.quelquepart.fr  Sat Feb  5 20:35:55 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 06 Feb 2005 02:35:55 +0100
Subject: Definitive documentation on newstyle classes? (WAS: Pickling
 and inheritance are making me hurt)
In-Reply-To: <mailman.2001.1107650814.22381.python-list@python.org>
References: <mailman.2001.1107650814.22381.python-list@python.org>
Message-ID: <42057236$0$599$636a15ce@news.free.fr>

Daniel Bickett a ?crit :
> I was reading the "Pickling and inheritance are making me hurt"
> thread, and the latest suggestion (as of this posting) was to do with
> the __setstate__ and __getstate__ methods. They caught my attention
> because I hadn't encountered them before, and it reminded me that in
> the past I've never been able to very good, definitive documentation
> on newstyle classes. 

Well, the fact is that __[get|set]state__() have nothing to do with new 
style classes, but with the Pickle protocol:
http://www.python.org/doc/2.3.4/lib/pickle-inst.html

(snip)
Bruno


From grante at visi.com  Mon Feb 14 14:49:08 2005
From: grante at visi.com (Grant Edwards)
Date: 14 Feb 2005 19:49:08 GMT
Subject: Can't subclass datetime.datetime?
Message-ID: <421100b4$0$41671$a1866201@visi.com>

Is it true that a datetime object can convert itself into a
string, but not the other way around?  IOW, there's no simple
way to take the output from str(d) and turn it back into d?

So, I tried to create a class that knows how to do that, but I
don't seem to be able to subclass datetime.datetime:

import datetime

class MyDatetime(datetime.datetime):
    def __init__(self,s):
            s1,s2 = s.split(' ')
            v = s1.split('-') + s2.split(':')
            v = map(int,v)
            datetime.datetime.__init__(self,v[0],v[1],v[2],v[3],v[4],v[5])

s = '2005-02-14 12:34:56'
d = MyDatetime(s)

Running the above yields:

  Traceback (most recent call last):
    File "dt.py", line 11, in ?
      d = MyDatetime(s)
  TypeError: function takes at least 3 arguments (1 given)

What's going on?
  
-- 
Grant Edwards                   grante             Yow!  I'm in a twist
                                  at               contest!! I'm in a
                               visi.com            bathtub! It's on Mars!! I'm
                                                   in tip-top condition!


From vegeta.z at gmail.com  Mon Feb 14 03:13:49 2005
From: vegeta.z at gmail.com (vegetax)
Date: Mon, 14 Feb 2005 04:13:49 -0400
Subject: custom classes in sets
References: <mailman.2510.1108363259.22381.python-list@python.org>
	<EYOdnUHqx-UVzY3fRVn-og@comcast.com>
Message-ID: <cupmfn$psj$1@sea.gmane.org>

Steven Bethard wrote:

> vegetax wrote:
>> How can i make my custom class an element of a set?
>> 
>> class Cfile:
>>   def __init__(s,path): s.path = path
>> 
>>   def __eq__(s,other):
>>    print 'inside equals'
>>    return not os.popen('cmp %s %s' % (s.path,other.path)).read()
>> 
>>   def __hashcode__(s): return s.path.__hashcode__()
>> 
>> the idea is that it accepts file paths and construct a set of unique
>> files (the command "cmp" compares files byte by byte.),the files can
>> have different paths but the same content
>> 
>> but the method __eq__ is never called
> 
> Seems to be called fine for me:
> 
> py> class Cfile:
> ...     def __eq__(self, other):
> ...         print 'inside equals'
> ...         return False
> ...     def __hash__(self):
> ...         return 0
> ...
> py> {Cfile():1, Cfile():2}
> inside equals
> {<__main__.Cfile instance at 0x01166490>: 1, <__main__.Cfile instance at
> 0x01166760>: 2}
> 
> Note that __eq__ won't be called if the hashes are different:

I just tried and it wont be called =(, so how can i generate a hash code for
the CFile class? note that the comparitions(__eq__) are done based on the
contents of a file using the command 'cmp', i guess thats not posible but 
thanks.

 




From curty at free.fr  Mon Feb 28 09:45:02 2005
From: curty at free.fr (Curt)
Date: 28 Feb 2005 14:45:02 GMT
Subject: TKinter
References: <38eb4lF5nldh7U1@individual.net>
	<mailman.3124.1109544498.22381.python-list@python.org>
Message-ID: <slrnd26b41.1ip.curty@einstein.electron.net>

On 2005-02-27, James Stroud <jstroud at mbi.ucla.edu> wrote:

> I thought the T was silent.

Kay-Inner, nasally?

>> So, is it pronounced 'Tee-Kinter', or 'Tee-Kay-Inter'?
>> I don't want to appear as a dork down the pub.

-- 
There is no intelligence without being.  I believe the inverse
to be equally true.  It appears then that I have somehow 
misinterpreted your status.
- G.C. Manstalz, in conversation


From mwm at mired.org  Mon Feb 21 00:34:24 2005
From: mwm at mired.org (Mike Meyer)
Date: Sun, 20 Feb 2005 23:34:24 -0600
Subject: [Fwd: Re: [Uuu-devel] languages] <-- Why Python
References: <mailman.2781.1108677768.22381.python-list@python.org>
	<1108678805.542584.171930@z14g2000cwz.googlegroups.com>
	<mailman.2783.1108679758.22381.python-list@python.org>
	<864qgaisoq.fsf@guru.mired.org>
	<mailman.2785.1108689484.22381.python-list@python.org>
	<86vf8qhcql.fsf@guru.mired.org>
	<mailman.2787.1108691319.22381.python-list@python.org>
	<86r7jdh5vw.fsf@guru.mired.org>
	<mailman.2852.1108869628.22381.python-list@python.org>
Message-ID: <86fyzqh3xb.fsf@guru.mired.org>

Nick Coghlan <ncoghlan at iinet.net.au> writes:

> Mike Meyer wrote:
>> Arich Chanachai <macrocosm at fastmail.fm> writes:
>>
>>>Mike Meyer wrote:
>>>
>>>>Whatever the intentions may be, the *act* is one of dictation. Since
>>>>the point of the underlying OS is to increase the interconnections
>>>>between applications (assuming I've found the correct web page and
>>>>interpreted it correctly), the underlying architecture should be
>>>>language-neutral. That allows as many applications as possible to play
>>>>in the environment.
>
> *Allowing* other languages is one thing, but that shouldn't preclude
> having a 'default' language. On other OS's, the default language is
> some form of shell scripting (i.e. Unix shell scripts, or Windows
> batch files). It would be good to have a real language to fill that
> role.

Um - I'd say Unix has no default language. Traditional Eunices come
with a nice selection of languages (sh, awk, sed, C), and modern ones
include more (C++, Perl, Python, Ruby, Lua). Tagging one as the
"default" does a disservice to the other languages, and to the OS as a
whole.

For that matter, I'd say that these days the default on Windows is VB,
unless there are hooks to talk to COM from batch files, since COM is
the standard scripting mechanism on Windows. Note that by providing a
scripting mechanism instead of a scripting language, you can script
applications with Python as or more easily than you can script them
with the MS provided solution of VB.

>> You've missed the point. Allowing a wide array of problem solving
>> choices is a goal, not a means. Instead of concentrating on adding
>> langauges, you should be provding an infrastructure that makes adding
>> langauges simple.  The Plan 9 example does this best, as any language
>> that can do file I/O is supported.
> Still, the builtin shell is going to need *some* form of scripting
> support. And if that looks like IPython's shell mode, so much the
> better.

Scripting support shouldn't "look like" a language, it should look
like a mechanism for hooking languages up to the system being
scripted. Shells are a particularly easy hookup, as they have only
three types of objects to deal with - commands, command results, and
text streams. Any language which lets you invoke commands and
manipulate the results of those commands and text streams is
sufficient for shell scripting.

IPython's pysh seems a little clumsy for interactive use, as it
requires special characters to distinguish between commands to be
passed to the shell and commands to be passed to the scripting
language. This should be contrasted with languages designed for
working in a command environment, like Rexx, sh and rc.

> Anyway, the reason to prefer Python to LISP for something like this,
> is that Python reads much more naturally for most people, whereas LISP
> requires that you write things 'out of order'.

I'll say it again - if you're arguing about which language to use,
you're arguing about the wrong thing.

       <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From steven.bethard at gmail.com  Thu Feb 17 01:32:36 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 16 Feb 2005 23:32:36 -0700
Subject: sampling items from a nested list
In-Reply-To: <mailman.2729.1108602951.22381.python-list@python.org>
References: <7_adnQhRBYDdV47fRVn-sA@comcast.com>
	<mailman.2729.1108602951.22381.python-list@python.org>
Message-ID: <8t2dnQq5sJIZp4nfRVn-tA@comcast.com>

Michael Spencer wrote:
> Steven Bethard wrote:
> 
>> So, I have a list of lists, where the items in each sublist are of 
>> basically the same form.  It looks something like:
>>
> ...
>>
>> Can anyone see a simpler way of doing this?
>>
>> Steve
> 
> You just make these up to keep us amused, don't you? ;-)

Heh heh.  I wish.  It's actually about resampling data read in the 
Yamcha data format:

http://chasen.org/~taku/software/yamcha/

So each sublist is a "sentence" and each tuple is the feature vector for 
a "word".  The point is to even out the number of positive and negative 
examples because support vector machines typically work better with 
balanced data sets.

> If you don't need to preserve the ordering, would the following work?:
> 
[snip]
>
>  >>> def resample2(data):
>  ...     bag = {}
>  ...     random.shuffle(data)
>  ...     return [[(item, label)
>  ...                 for item, label in group
>  ...                     if bag.setdefault(label,[]).append(item)
>  ...                         or len(bag[label]) < 3]
>  ...                            for group in data if not 
> random.shuffle(group)]

It would be preferable to preserve ordering, but it's not absolutely 
crucial.  Thanks for the suggestion!

STeVe


From ramen at lackingtalent.com  Thu Feb 17 16:00:59 2005
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Thu, 17 Feb 2005 14:00:59 -0700
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <pan.2005.02.17.15.13.36.917107@jerf.org>
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<37hqlrF59l2b2U1@individual.net>
	<873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<421450CC.9080504@swiftdsl.com.au>
	<87psyz8h9o.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<4214A800.4010509@swiftdsl.com.au>
	<pan.2005.02.17.15.13.36.917107@jerf.org>
Message-ID: <TC7Rd.6895$zs.432@okepread04>

Jeremy Bowers wrote:
> I'd point out that the Zen that can be comprehended by checking off items
> in a list is not the true Zen.

The Zen that can be imported is not the eternal Zen. =)


From rkern at ucsd.edu  Mon Feb 14 06:20:14 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 14 Feb 2005 03:20:14 -0800
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cuq084$r99$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr>
Message-ID: <cuq1he$cd7$1@news1.ucsd.edu>

Ilias Lazaridis wrote:
> Robert Kern wrote:

[snip]

>> The answer to most of your questions is, "Because no one has yet 
>> volunteered their time and effort to get the job done."
> 
> 
> this answer do not fit in most questions.
 >
> please review them again.

Against my better judgement, I have.

It certainly fits a, b, and c. It also fits d if you place an implicit 
"Yes, " in front of the answer. 4/6. I stick with my assessment.

>> If this is important to you, you need to step up yourself and get it 
>> done and not expect other people to volunteer their unpaid time to 
>> satisfy your whims.
>>
>> The open source Python community is driven by volunteerism, not a 
>> sense of entitlement. If this does not appeal to you, then perhaps the 
>> Python community is not the right one for you.
> 
> 
> I ask some questions and suggest some things.
> 
> Voluntarlily and without beeing paid.

Questions and suggestions are don't count for much in this community. 
Code and well-written patches do.

Stop wasting time on c.l.py and get to work! If you can't do that, then 
this is not the community you are looking for.

> There are many commercial systems around python.

And yet there is not one company that has someone devoted full-time to 
developing Python. Not even Guido. Most of core-Python development 
happens in people's spare, unpaid time.

Volunteerism is the core of this community. Trust me.

> So please stop this volunteerism-stuff.

No. You are asking others to volunteer their time, or perhaps, 
alternately, the PSF and other businesses to volunteer their money to 
fund people's time to satisfy *your* wants. I am asking you to volunteer 
*your* time to satisfy *your* wants, or alternately, stop writing 
questionnaires and bothering us.

Note that this reaction is pretty specific to you and not to other 
newcomers. Most newcomers do not carry around a sense of entitlement 
that could flatten a small village. Thus, they are treated with respect 
and helpfulness. We would appreciate it if you would emulate these 
people. On a purely pragmatic note, you have to admit that they are 
getting much better help than you are.

> If you like to help me and other newcomers, please give me simple some 
> answers on the initial questions.

I did provide some answers. Please review them again.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From steve at holdenweb.com  Sat Feb  5 09:56:43 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 05 Feb 2005 09:56:43 -0500
Subject: Error!
In-Reply-To: <4204dcdc$0$14112$626a14ce@news.free.fr>
References: <614c778e.0502041459.39da55c1@posting.google.com>
	<1107563070.861085.180680@g14g2000cwa.googlegroups.com>
	<614c778e.0502050402.4c6f46eb@posting.google.com>
	<BB3Nd.103625$Jk5.20748@lakeread01>
	<4204dcdc$0$14112$626a14ce@news.free.fr>
Message-ID: <1e5Nd.103641$Jk5.88921@lakeread01>

Bruno Desthuilliers wrote:

> Steve Holden a ?crit :
> (snip)
> 
>> So, for example, your program might look like this:
>>
>> base_price = int(raw_input(...))
>> tax_rate = int(raw_input(...)
>> tax_amount = base_price * ((100+tax_amount)/...)
> 
> s/(100+tax_amount)/(100 + tax_rate)/, I guess ?

Oops.

Let's try

tax_amount = base_price*(tax_rate/100.0)

Clearly I was right about simplification being a good idea :-)

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From lars-www at lycos.com  Fri Feb 25 05:42:16 2005
From: lars-www at lycos.com (Lars)
Date: 25 Feb 2005 02:42:16 -0800
Subject: Shift Confusion
References: <1109225214.430739.259600@l41g2000cwc.googlegroups.com>
Message-ID: <1109328136.460034.71780@z14g2000cwz.googlegroups.com>

Hi Kamilche,

Aside from the 7bit confusion you should take a look at the 'struct'
module. I bet it will simplify your life considerably.

#two chars
>>> import struct
>>> struct.pack('cc','A','B')
'AB'

#unsigned short + two chars
>>> struct.pack('Hcc',65535,'a','b')
'\xff\xffab'


Cheers
Lars



From bdesth.quelquechose at free.quelquepart.fr  Tue Feb 15 18:50:35 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 16 Feb 2005 00:50:35 +0100
Subject: Variables.
In-Reply-To: <1114m2urmov6ec7@corp.supernews.com>
References: <614c778e.0502150429.1a2a4d8d@posting.google.com>
	<4211f87e$0$16331$636a15ce@news.free.fr>
	<1114m2urmov6ec7@corp.supernews.com>
Message-ID: <42128842$0$15796$636a15ce@news.free.fr>

Jeff Shannon a ?crit :
> bruno modulix wrote:
> 
>> administrata wrote:
>>
>>> I wrote this, It's a bit lame though
>>>
>> (snip code - see other answers in this thread)
>>
>>> raw_input("\n\\t\t\t- The End -")
>>
>>
>>
>> Why on earth are you using raw_input() here ?
> 
> 
> This is a fairly common idiom, on Windows at least.  

Windows only, I guess...

> If running a 
> console app from Explorer, the console will close as soon as the app 
> terminates.  Using raw_input() at the end of the app means that it won't 
> close until the user hits Enter.

So why dont you just open the console before running the app, then ?-)

Bruno


From fredrik at pythonware.com  Fri Feb 11 12:49:53 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 11 Feb 2005 18:49:53 +0100
Subject: sre is broken in SuSE 9.2
References: <mailman.2299.1108029731.22381.python-list@python.org><1108060527.378911.146240@o13g2000cwo.googlegroups.com><cugc2v$i8u$1@swifty.westend.com><1108064973.719544.228970@z14g2000cwz.googlegroups.com><mailman.2372.1108115088.22381.python-list@python.org>
	<1108133339.401022.272310@f14g2000cwb.googlegroups.com>
Message-ID: <cuir3t$tlf$1@sea.gmane.org>

Serge Orlov wrote:

>> >>> re.compile(ur'\w+', re.U).findall(u'\xb5\xba\xe4\u0430')
>> [u'\xb5\xba\xe4\u0430']
>
> I can't find the strict definition of isalpha, but I believe average
> C program shouldn't care about the current locale alphabet, so isalpha
> is a union of all supported characters in all alphabets

btw, what does isalpha have to do with this example?

</F> 





From martin at v.loewis.de  Wed Feb 23 16:07:19 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 23 Feb 2005 22:07:19 +0100
Subject: LC_ALL and os.listdir()
In-Reply-To: <mailman.2959.1109142240.22381.python-list@python.org>
References: <mailman.2959.1109142240.22381.python-list@python.org>
Message-ID: <421cf088$0$8788$9b622d9e@news.freenet.de>

Kenneth Pronovici wrote:
>    1) Why LC_ALL has any effect on the os.listdir() result? 

The operating system (POSIX) does not have the inherent notion
that file names are character strings. Instead, in POSIX, file
names are primarily byte strings. There are some bytes which
are interpreted as characters (e.g. '\x2e', which is '.',
or '\x2f', which is '/'), but apart from that, most OS layers
think these are just bytes.

Now, most *people* think that file names are character strings.
To interpret a file name as a character string, you need to know
what the encoding is to interpret the file names (which are byte
strings) as character strings.

There is, unfortunately, no operating system API to carry
the notion of a file system encoding. By convention, the locale
settings should be used to establish this encoding, in particular
the LC_CTYPE facet of the locale. This is defined in the
environment variables LC_CTYPE, LC_ALL, and LANG (searched
in this order).

>    2) Why only 3 of the 4 files come back as unicode strings?

If LANG is not set, the "C" locale is assumed, which uses
ASCII as its file system encoding. In this locale,
'\xe2\x99\xaa\xe2\x99\xac' is not a valid file name (atleast
it cannot be interpreted as characters, and hence not
be converted to Unicode).

Now, your Python script has requested that all file names
*should* be returned as character (ie. Unicode) strings, but
Python cannot comply, since there is no way to find out what
this byte string means, in terms of characters.

So we have three options:
1. skip this string, only return the ones that can be
    converted to Unicode. Give the user the impression
    the file does not exist.
2. return the string as a byte string
3. refuse to listdir altogether, raising an exception
    (i.e. return nothing)

Python has chosen alternative 2, allowing the application
to implement 1 or 3 on top of that if it wants to (or
come up with other strategies, such as user feedback).

> 3) The proper "general" way to deal with this situation?

You can chose option 1 or 3; you could tell the user
about it, and then ignore the file, you could try to
guess the encoding (UTF-8 would be a reasonable guess).

> My goal is to build generalized code that consistently works with all
> kinds of filenames.

Then it is best to drop the notion that file names are
character strings (because some file names aren't). You
do so by converting your path variable into a byte
string. To do that, you could try

path = path.encode(sys.getfilesystemencoding())

This should work in most cases; Python will try to
determine the file system encoding from the environment,
and try to encode the file. Notice, however:

- on some systems, getfilesystemencoding may return None,
   if the encoding could not be determined. Fall back
   to sys.getdefaultencoding in this case.
- depending on where you got path from, this may
   raise a UnicodeError, if the user has entered a
   path name which cannot be encoding in the file system
   encoding (the user may well believe that she has
   such a file on disk).

So your code would read

try:
   path = path.encode(sys.getfilesystemencoding() or
                      sys.getdefaultencoding())
except UnicodeError:
   print >>sys.stderr, "Invalid path name", repr(path)
   sys.exit(1)

> Ultimately, all I'm trying to do is copy some files
> around.  I'd really prefer to find a programmatic way to make this work
> that was independent of the user's configured locale, if possible.

As long as you manage to get a byte string from the path
entered, all should be fine.

Regards,
Martin


From mhartl at post.harvard.edu  Fri Feb 11 15:54:32 2005
From: mhartl at post.harvard.edu (Michael Hartl)
Date: 11 Feb 2005 12:54:32 -0800
Subject: check if object is number
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>
	<374ho0F560ughU1@individual.net>
	<66WdnbJbuf5yj5DfRVn-iA@comcast.com>
Message-ID: <1108155272.438423.177460@l41g2000cwc.googlegroups.com>

As luck would have it, isnumber is a built-in Python function:

>>> isnumber(1)
True
>>> isnumber(1.0)
True
>>> isnumber('1')
False

Michael

--
Michael D. Hartl, Ph.D.
Chief Technology Officer
http://quarksports.com/



From ncoghlan at iinet.net.au  Sat Feb  5 11:45:33 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 06 Feb 2005 02:45:33 +1000
Subject: variable declaration
In-Reply-To: <1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
Message-ID: <4204F82D.7070704@iinet.net.au>

Alex Martelli wrote:
> 'global' is an ugly wart, to all intents and purposes working "as if" it
> was a declaration.  If I had to vote about the one worst formal defect
> of Python, it would surely be 'global'.
> 
> Fortunately, it's reasonably easy to avoid the ugliness, by avoiding
> rebinding (within functions) global variables, which tend to be easy. 

Hear, hear! And if I could write "gbls = namespace(globals())" in order to deal 
with those rare cases where I *do* need to rebind globals, all uses of the 
keyword could be handled nicely, while entirely eliminating the need for the 
keyword itself.

> *ONLY* that tiny subset of such typos which happened on the left of a
> plain '=' (since all others, happening on the RIGHT of an '=' or on the
> left of an _augmented_ '=', were already caught), and ONLY regarding
> barenames (such typos on any but the rightmost component of compound
> names were already caught intrinsically, and catching those on the
> rightmost component is trivially easier than introducing a {YECCCCHH}
> 'vars' as you so stubbornly insist)...

Would you be as violently opposed to a 'rebinding' augmented assignment operator?

Since bare assignment statements essentially serve the purpose of variable 
declarations, I sometimes *would* like a way to say 'bind this existing name to 
something different'. A rebinding operation would provide a way to make that 
intention explicit, without cluttering the language with useless declarations.

In addition to detecting typos in local variable names, it would *also* address 
the problem of detecting typos in the right-most name in a compound name (e.g. 
making a habit of always using the rebinding operator when modifying member 
variables outside of __init__ would make it easier to avoid inadvertently 
creating a new instance variable instead of modifying an existing one)

With a rebinding operator available, the only typos left to slip through the net 
are those which match an existing visible name and those where the programmer 
has explicitly requested an unconditional name binding by using '=' and then 
made a typo on the left hand side.

Cheers,
Nick.
Did I mention the possible incidental benefit of reducing the whinging about the 
lack of variable declarations?

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From jjl at pobox.com  Sun Feb 13 09:58:49 2005
From: jjl at pobox.com (John J. Lee)
Date: 13 Feb 2005 14:58:49 +0000
Subject: Commerical graphing packages?
References: <420d1595$1@nntp.zianet.com>
	<1108163937.533683.162220@g14g2000cwa.googlegroups.com>
	<87650x28wu.fsf@pobox.com>
	<1108242489.958991.92060@o13g2000cwo.googlegroups.com>
Message-ID: <87ll9sjyl2.fsf@pobox.com>

18k11tm001 at sneakemail.com writes:

> >If you're generating lots of graphs programatically, eg. on a web
> >server, grace is not what you want.  Yes, it has a command language,
> >but IIRC it depends on X11, and windows even pop up as it runs in
> >batch mode.  Bleh.
> 
> I don't understand what you're talking about. I've been using GRACE in
> batch mode for years and I've never had a window pop up. The only time
> a window "pops up" is when you start GRACE interactively.

Hmm, I guess I was actually using grace_np.py rather than batch
mode... it was a few years ago I last used it.


> The GRACE command language is not the greatest, but it gets the job
> done. It may have improved lately too (I run a fairly old version).
> 
> Another nice feature of GRACE is a fairly active user community and a
> mailing list for help. They helped get me unstuck several times a while
> back.

...and some nasty features are the rather nasty GUI (at least, I found
it awkward) and the fact that it's the only X11 application I've used
that ever managed to crash my whole X desktop.


John


From mahs at telcopartners.com  Mon Feb 14 12:13:06 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Mon, 14 Feb 2005 09:13:06 -0800
Subject: nested lists as arrays
In-Reply-To: <b35e3308.0502140835.53d3d9b2@posting.google.com>
References: <b35e3308.0502140835.53d3d9b2@posting.google.com>
Message-ID: <cuqm2j$6hc$1@sea.gmane.org>

naturalborncyborg wrote:
> Hi, I'm using nested lists as arrays and having some problems with
> that approach. In my puzzle class there is a swapelement method which
> doesn't work out.

What "doesn't work out"?  On casual inspection that method seems to "work":

  >>> p = Puzzle(2)
  >>> p.elements[0][0] = 1
  >>> p.elements[1][1] = 2
  >>> p.elements
[[1, 0], [0, 2]]
  >>> p.swapElements(0,0,1,1)
  >>> p.elements
[[2, 0], [0, 1]]
  >>>

What should it do instead?

Michael



From essai1 at mci.local  Sat Feb  5 03:45:40 2005
From: essai1 at mci.local (News M Claveau /Hamster-P)
Date: Sat, 5 Feb 2005 09:45:40 +0100
Subject: executing VBScript from Python and vice versa
References: <mailman.1915.1107548562.22381.python-list@python.org>
	<yNUMd.11829$sr1.11672@fe2.texas.rr.com>
Message-ID: <42048841$0$18852$8fcfb975@news.wanadoo.fr>

Cool.  :-)

And it's OK, also, for JScript (MS-Javascript) :


import win32com.client

vbs = win32com.client.Dispatch("ScriptControl")
vbs.language = "vbscript"
scode="""Function mul2(x)
mul2=x*2
End Function
"""
vbs.addcode(scode)
print vbs.eval("mul2(123)")

js = win32com.client.Dispatch("ScriptControl")
js.language = "jscript"
scode="""function mul3(x){
   vret=x*3;
   return(vret);
}
function mul4(x){
   vret=x*4;
   return(vret);
}
"""
js.addcode(scode)
print js.eval("mul3(123);")
print js.eval("mul4(121);")





@-salutations
-- 
Michel Claveau





From eppstein at ics.uci.edu  Thu Feb 24 23:59:48 2005
From: eppstein at ics.uci.edu (David Eppstein)
Date: Thu, 24 Feb 2005 20:59:48 -0800
Subject: [perl-python] generic equivalence partition
References: <1109245733.261643.219420@f14g2000cwb.googlegroups.com>
Message-ID: <eppstein-CDFABC.20594724022005@news.service.uci.edu>

In article <1109245733.261643.219420 at f14g2000cwb.googlegroups.com>,
 "Xah Lee" <xah at xahlee.org> wrote:

> parti(aList, equalFunc)
> 
> given a list aList of n elements, we want to return a list that is a
> range of numbers from 1 to n, partition by the predicate function of
> equivalence equalFunc. (a predicate function is a function that
> takes two arguments, and returns either True or False.)

In Python it is much more natural to use ranges from 0 to n-1.
In the worst case, this is going to have to take quadratic time 
(consider an equalFunc that always returns false) so we might as well do 
something really simple rather than trying to be clever.

def parti(aList,equalFunc):
    eqv = []
    for i in range(len(aList)):
        print i,eqv
        for L in eqv:
            if equalFunc(aList[i],aList[L[0]]):
                L.append(i)
                break;
        else:
            eqv.append([i])

If you really want the ranges to be 1 to n, add one to each number in 
the returned list-of-lists.

-- 
David Eppstein
Computer Science Dept., Univ. of California, Irvine
http://www.ics.uci.edu/~eppstein/


From irmen.NOSPAM at xs4all.nl  Sat Feb 12 14:19:34 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sat, 12 Feb 2005 20:19:34 +0100
Subject: is there a safe marshaler?
In-Reply-To: <hCrPd.47388$Z14.33161@news.indigo.ie>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<9RMOd.47295$Z14.32810@news.indigo.ie>
	<420bd184$0$28994$e4fe514c@news.xs4all.nl>
	<DtROd.47310$Z14.32852@news.indigo.ie>
	<420bedb4$0$28975$e4fe514c@news.xs4all.nl>
	<YjTOd.47318$Z14.32821@news.indigo.ie>
	<420d2441$0$28991$e4fe514c@news.xs4all.nl>
	<hCrPd.47388$Z14.33161@news.indigo.ie>
Message-ID: <420e567a$0$28983$e4fe514c@news.xs4all.nl>

Alan Kennedy wrote:
> [Irmen de Jong]
> 
>> Interestingly enough, I just ran across "Flatten":
>> http://sourceforge.net/project/showfiles.php?group_id=82591&package_id=91311 
>>
>> "...which aids in serializing/unserializing networked data securely,
>> without having to fear execution of code or the like."
>>
>> Sounds promising!
> 
> 
> Well, I'm always dubious of OSS projects that don't even have any bugs 
> reported, let alone fixed: no patches submitted, etc, etc.
> 
> http://sourceforge.net/tracker/?group_id=82591
> 
> Though maybe I'm missing something obvious?

Perhaps the SF trackers are simply not used for that project?
Consider my own project:
http://sourceforge.net/tracker/?group_id=18837
I can assure you that I have fixed and applied a huge
amount of bugs and patches during the lifetime of the project.
They are just not entered in the trackers, except for a few.

--Irmen




From steven.bethard at gmail.com  Sun Feb  6 14:15:29 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 06 Feb 2005 12:15:29 -0700
Subject: empty classes as c structs?
In-Reply-To: <mailman.2006.1107658273.22381.python-list@python.org>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<7rSdne7BcbDeV57fRVn-jg@comcast.com>	<mailman.1963.1107594941.22381.python-list@python.org>	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>	<mailman.1973.1107618702.22381.python-list@python.org>	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>
	<mailman.2006.1107658273.22381.python-list@python.org>
Message-ID: <BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>

Nick Coghlan wrote:
> By assigning to __dict__ directly, you can use the attribute view either 
> as it's own dictionary (by not supplying one, or supplying a new one), 
> or as a convenient way to programmatically modify an existing one. For 
> example, you could use it to easily bind globals without needing the 
> 'global' keyword:
> 
> Py> class attr_view(object):
> ...     def __init__(self, data):
> ...         self.__dict__ = data
> ...
> Py> def f():
> ...   gbls = attr_view(globals())
> ...   gbls.x = 5
> ...
> Py> x
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> NameError: name 'x' is not defined
> Py> f()
> Py> x
> 5

Hmm... interesting.  This isn't the main intended use of 
Bunch/Struct/whatever, but it does seem like a useful thing to have... 
I wonder if it would be worth having, say, a staticmethod of Bunch that 
produced such a view, e.g.:

class Bunch(object):
     ...
     @staticmethod
     def view(data):
         result = Bunch()
         result.__dict__ = data
         return result

Then you could write your code as something like:

gbls = Bunch.view(globals())

I'm probably gonna need more feedback though from people though to know 
if this is a commonly desired use case...

Steve


From breamoreboy at aol.com  Sun Feb 20 11:22:47 2005
From: breamoreboy at aol.com (BrainDead)
Date: 20 Feb 2005 08:22:47 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2859.1108907636.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr> <cv7k8e$4pa$03$1@news.t-online.com>
	<cv7m2m$gp$1@usenet.otenet.gr> <cv7nh1$b57$03$1@news.t-online.com>
	<cv7r15$lhm$1@usenet.otenet.gr> <cv7vte$t1g$01$1@news.t-online.com>
	<1108849567.136885.141960@z14g2000cwz.googlegroups.com>
	<mailman.2859.1108907636.22381.python-list@python.org>
Message-ID: <1108916567.822311.64550@f14g2000cwb.googlegroups.com>

[snip, Ilias would not understand it]

> P.S. if Ilias volunteers, or offers to pay someone to do this,
instead of just
> complaining, will hell freeze over?)

Nick,

There is about as much chance of hell freezing over as there is of
England beating Australia in the cricket this summer. [I'am a
half-caste, English father, Welsh mother.  Makes it worse when you are
watching rugby :)]

To get back to Ilias, people on c.l.py have already pointed out that he
has been banned from other mailing lists, responds to 99% of assistance
with "not relevant", "off topic", or some similar garbage, and
obviously has no intention of actually delivering anything to anybody.
See c.l.clipper.visual-objects amognst other ngs for their opinion on
this megastar.

Me, I use Python to write simple programs to suit my own needs.  I have
never in the last three/four years needed to ask a question because the
documentation provided is perfectly adequate for me, failing which
Google this ng for an answer.

Ilias,

If you can't stand the heat, get out of the server room.

Kindest regards.

Mark Lawrence.



From rkern at ucsd.edu  Mon Feb  7 19:30:48 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 07 Feb 2005 16:30:48 -0800
Subject: negative integer division
In-Reply-To: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
References: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
Message-ID: <cu917l$699$1@news1.ucsd.edu>

Imbaud Pierre wrote:
> integer division and modulo gives different results in c and python, 
> when negative numbers
> are involved. take gdb as a widely available c interpreter
>  print -2 /3
> 0 for c, -1 for python.
> more amazing, modulos of negative number give negative values! (in c).
> from an algebraic point of view, python seems right, but I thought 
> python conformity to the underlying c compiler was a strong commitment, 
> obviously not here, and I found no explanation whatsoever in python doc.
> no actual programming challenge for me here, I just had this bug, after 
> confidently translating from python to c.

I don't think there's much *commitment* to follow the behaviour of your 
C compiler. It's more of a default stance when the issues get too 
complicated for Python to implement itself. Thus, much of the floating 
point behaviour defaults to the behaviour of your platform because 
floating point math is hard and getting consistent behaviour on lots of 
platforms is really hard.

Integers are a piece of cake, relatively speaking, and I think that it's 
worth fixing up a few warts from the C behaviour.

As for documentation, see 
http://www.python.org/doc/current/lib/typesnumeric.html

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From wilberforce at gmail.com  Sun Feb 20 16:07:13 2005
From: wilberforce at gmail.com (xtian)
Date: 20 Feb 2005 13:07:13 -0800
Subject: recommended way of generating HTML from Python
References: <1108889625.068929.88890@z14g2000cwz.googlegroups.com>
Message-ID: <1108933633.259271.182890@o13g2000cwo.googlegroups.com>

Stan (part of nevow, which is part of twisted) is a nice python syntax
for building HTML - I like the use of () and [] to separate attributes
from sub-elements.

For example:

class Greeter(rend.Page):
    def greet(self, context, data):
        return random.choice(["Hello", "Greetings", "Hi"]), " ", data

    docFactory = loaders.stan(
    tags.html[
    tags.head[ tags.title[ "Greetings!" ]],
    tags.body[
        tags.h1(style="font-size: large")[ "Now I will greet you:" ],
        greet
    ]
])

(From http://nevow.com/releases/0.3.0/nevow-intro.html)

I don't know how detachable it is from the rest of nevow. I'd assume it
wouldn't be too difficult to implement in a standalone fashion.

xtian



From k.robert at gmx.de  Thu Feb  3 05:08:23 2005
From: k.robert at gmx.de (Robert)
Date: 3 Feb 2005 02:08:23 -0800
Subject: convert ftp.retrbinary to file object? - Python language lacks
	expression?
Message-ID: <19804fd8.0502030208.10ace31e@posting.google.com>

I just tried to convert a (hugh size) ftp.retrbinary run into a
pseudo-file object with .read(bytes) method in order to not consume
500MB on a copy operation.

First I thought, its easy as usual with python using something like
'yield' or so.

Yet I didn't manage to do (without using threads or rewriting
'retrbinary')? Any ideas?

#### I tried a pattern like:
    .... 
    def open(self,ftppath,mode='rb'):
        class FTPFile: #TODO
            ...
            def iter_retr()
                ...
                def callback(blk):
                    how-to-yield-from-here-to-iter_retr blk???
                ftp.retrbinary("RETR %s" % relpath,callback)
            def read(self, bytes=-1):
                ... 
                self.buf+=self.iter.next()
            ...
        ....


From marian at mba-software.de  Wed Feb  2 04:12:05 2005
From: marian at mba-software.de (=?ISO-8859-15?Q?Marian_Aldenh=F6vel?=)
Date: Wed, 02 Feb 2005 10:12:05 +0100
Subject: Printing Filenames with non-Ascii-Characters
In-Reply-To: <opslja1wpv6yt6e7@news.cisco.com>
References: <36a3ikF4uk8r0U1@individual.net> <opslja1wpv6yt6e7@news.cisco.com>
Message-ID: <36bjrgF4s9bg8U1@individual.net>

Hi,

Thank you very much, you have collectively cleared up some of the confusion.

> English windows command prompt uses cp437 charset.

To be exact my Windows is german but I am not outputting to the command prompt
window. I am using eclipse with the pydev plugin as development platform and
the output is redirected to the console view in the IDE. I am not sure how
this affects the problem and have since tried a vanilla console too. The
problem stays the same, though.

I wonder what surprises are waiting for me when I first move this to my
linux-box :-). I believe it uses UTF-8 throughout.

 > print d.encode('cp437')

So I would have to specify the encoding on every call to print? I am sure to
forget and I don't like the program dying, in my case garbled output would be
much more acceptable.

Is there some global way of forcing an encoding instead of the default
'ascii'? I have found references to setencoding() but this seems to have gone
away.

> The issue is a terminal only understand certain character set.

I have experimented a bit now and I can make it work using encode(). The
eclipse console uses a different encoding than my windows command prompt, by
the way. I am sure this can be configured somewhere but I do not really care
at the moment.

 > If you have  unicode string, like d in your case, you have to encode it before
> it can be printed.

I got that now.

So encode() is a method of a unicode string, right?. I come from a background
of statically typed languages so I am a bit queasy when I am not allowed to
explicitly specify type.

How can I, maybe by print()-ing something, find out what type d actually is
of? Just to make sure and get a better feeling for the system?

Should d at any time not be a unicode string but some other flavour of string,
will encode() still work? Or do I need to write a function myPrint() that
distinguishes them by type and calls encode() only for unicode strings?

> So how did you get a unicoded d to start with?

I have asked myself this question before after reading the docs for
os.listdir(). But I have no way of finding out what type d really is (see
question above :-)). So I was dead-reckoning.

Can I force a string to be of a certain type? Like

     nonunicode=unicode.encode("specialencoding")

How would I do it the other way round? From encoded representation to full
unicode?

> If 'somepath' is unicode,  os.listdir returns a list of unicode. 
 > So why is somepath unicode?

 > One possible source is XML parser, which returns string in unicode.

I get a root-directory from XML and I walk the filesystem from there. That
explains it.

> Windows NT support unicode filename. I'm not sure about Linux. The 
> result maybe slightly differ.

I think I will worry about that later. I can create files using german umlauts
on the linux box. I am sure I will find a way to move those names into my
Python program.

I will not move data between the systems so there will not be much of
a problem.

Ciao, MM
-- 
Marian Aldenh?vel, Rosenhain 23, 53123 Bonn. +49 228 624013.
http://www.marian-aldenhoevel.de
"There is a procedure to follow in these cases, and if followed it can
  pretty well guarantee a generous measure of success, success here
  defined as survival with major extremities remaining attached."


From mt at 3planes.com  Tue Feb  1 15:43:50 2005
From: mt at 3planes.com (Michael Tobis)
Date: 1 Feb 2005 12:43:50 -0800
Subject: variable declaration
In-Reply-To: <1grbjim.1pkh5toxl7g9dN%aleaxit@yahoo.com>
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<uImdnUAKxbKaFWPcRVn-2A@telcove.net>
	<1107205410.367521.50490@f14g2000cwb.googlegroups.com>
	<44SdnUZGopnrAWLcRVn-pg@telcove.net>
	<1107275364.730411.24710@c13g2000cwb.googlegroups.com>
	<1grbjim.1pkh5toxl7g9dN%aleaxit@yahoo.com>
Message-ID: <1107290630.115616.322680@z14g2000cwz.googlegroups.com>

> All in all, I fail to see what gains would be expected by making
Python
> into a single-assignment or single-binding language, even on a module
by
> module basis, to repay this kind of awkwardness.

Just to be clear, if anyone was suggesting that, it wasn't me.

It would be helpful on occasion in a numarray development context to
have *specific* refererences be bound only once, and I wouldn't be
surprised if the compiler couldn't use that information to good
advantage too.

However, this subthread is about whether rebinding is completely
avoidable. Others including you have come up with better reasons than I
did that it's not.

If rebinding is normal, I think the 'epselon' bug can't be dismissed as
completely avoidable. This is something that I gather you disagree with
on the presumption that everyone who writes Python is sufficently
talented that they can use their skills to avoid getting too far into
this trap.

Since I'm very much a believer in Python as a beginner's language, that
doesn't satisfy me. "Declarations are impractical" would satisfy me,
but so far I'm not completely convinced of that.

mt



From sjmachin at lexicon.net  Mon Feb 21 17:11:21 2005
From: sjmachin at lexicon.net (John Machin)
Date: 21 Feb 2005 14:11:21 -0800
Subject: Tuple index
In-Reply-To: <cvdll3$f4u$1@news.netins.net>
References: <cvbcc6$b5f$1@news.netins.net>
	<1108951559.490554.305310@l41g2000cwc.googlegroups.com>
	<cvdian$ejs$1@news.netins.net> <zvOdneQkB6SyzoffRVn-jw@comcast.com>
	<cvdll3$f4u$1@news.netins.net>
Message-ID: <1109023881.232830.183100@o13g2000cwo.googlegroups.com>


Steve M wrote:
> I'm actually doing this as part of an exercise from a book. What the
program
> is supposed to do is be a word guessing game. The program automaticly
> randomly selects a word from a tuple.

Care to tell us which book is using a tuple for this, but hasn't got to
lists yet?

Cheers,
John



From enleverlesO.OmcO at OmclaveauO.com  Tue Feb 15 14:57:14 2005
From: enleverlesO.OmcO at OmclaveauO.com (Do Re Mi chel La Si Do)
Date: Tue, 15 Feb 2005 20:57:14 +0100
Subject: keeping a COM server alive
References: <1108382003.358573.132710@c13g2000cwb.googlegroups.com><42109641$0$6592$8fcfb975@news.wanadoo.fr>
	<mailman.2633.1108485376.22381.python-list@python.org>
Message-ID: <42125abd$0$819$8fcfb975@news.wanadoo.fr>

Hi !

Sorry, but I receive the mailing list, I had readed THE book (Prog...Win32),
I questioned M.Hammond, I traversed the archives...
But I have no solution.

And, also, a COM server which answers several clients is very smart to
design; in particular because of the temporal re-entry  (re-entrance ?)

@-salutations
-- 
Michel Claveau





From luc at pasdespams.fr  Sat Feb 12 06:56:56 2005
From: luc at pasdespams.fr (Luc)
Date: Sat, 12 Feb 2005 12:56:56 +0100
Subject: Web interface GUI??
Message-ID: <420deeea$0$19443$8fcfb975@news.wanadoo.fr>

I am a newbye. I am looking for a multi-platform user interface solution
(windows, linux).
Untill now, I used wxPython which worked fine at the beginning (MDK9,
Windows NT4). Nevertheless, I was very disapointed when I noticed that my
applications did not work with recent linux distributions (MDK10.1, FC3).
This was because of the wxPython version...and it seemed to be very
difficult to come back to an older wxPython version with these new
distributions, because of dependencies problems.
So I am looking for another solution with a web interface that should work
with linux and windows XP.
I had a look to zope but was afraid with the complexity and debug
difficulties.
Are there some other solutions?



From tchur at optushome.com.au  Tue Feb  1 02:03:50 2005
From: tchur at optushome.com.au (Tim Churches)
Date: Tue, 01 Feb 2005 18:03:50 +1100
Subject: python and gpl
Message-ID: <200502010704.j1174ZsB003649@mail17.syd.optusnet.com.au>

An embedded and charset-unspecified text was scrubbed...
Name: not available
URL: <http://mail.python.org/pipermail/python-list/attachments/20050201/6e0ce2ef/attachment.ksh>

From fumanchu at amor.org  Thu Feb  3 00:29:39 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Wed, 2 Feb 2005 21:29:39 -0800
Subject: Python AST Sprint
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E339833D@exchange.hqamor.amorhq.net>

Timothy Fitz wrote:
> I am interested in helping Python, however my knowledge of Abstract
> Syntax Trees is lacking. Where should I turn to educate myself? Any
> books or websites would be appreciated.

Follow the links and advice in this python-dev thread:
http://marc.free.net.ph/thread/20050104.014254.b2978a88.en.html#20050104
.014254.b2978a88

That should hold you until the sprint ;)


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org


From gmane-schpam at joefrancia.com  Wed Feb  9 22:46:01 2005
From: gmane-schpam at joefrancia.com (Joe Francia)
Date: Wed, 09 Feb 2005 22:46:01 -0500
Subject: PyQt and Python 2.4 - also WinXP LnF?
In-Reply-To: <1108003471.242829.297030@o13g2000cwo.googlegroups.com>
References: <1108003471.242829.297030@o13g2000cwo.googlegroups.com>
Message-ID: <cuelaj$11o$1@sea.gmane.org>

Simon John wrote:
> Also, would I have to build it all myself or does Riverbank/TheKompany
> provide binaries like PyQt 3.13 for Python 2.4, as I don't have Visual
> Studio I can't build it myself.

There is a GPLed version of Qt that will build on win32, and free 
compilers to build it with.  Despite it coming from the KDE-Cygwin 
project, it does not require Cygwin to build or run.

http://kscraft.sourceforge.net/convert_xhtml.php?doc=pyqt-windows-install.xhtml
http://kde-cygwin.sourceforge.net/qt3-win32/compile-msvc-2005.php
http://kde-cygwin.sourceforge.net/qt3-win32/compile-mingw.php

Peace,
Joe



From deetsNOSPAM at web.de  Wed Feb 16 09:11:46 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 16 Feb 2005 15:11:46 +0100
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<37h194F50j4pkU1@individual.net>
	<7xfyzwehq7.fsf@ruckus.brouhaha.com>
Message-ID: <37h2keF5a2ijjU1@individual.net>

Paul Rubin wrote:

> "Diez B. Roggisch" <deetsNOSPAM at web.de> writes:
>> Maybe ZODB helps.
> 
> I think it's way too heavyweight for what I'm envisioning, but I
> haven't used it yet.  I'm less concerned about object persistence
> (just saving strings is good enough) than finding the simplest
> possible approach to dealing with concurrent update attempts.

And that's exactly where zodb comes into play. It has full ACID support.
Opening a zodb is a matter of three lines of code - not to be compared to
rdbms'ses. And apart from some standard subclassing, you don't have to do
anything to make your objects persistable. Just check the tutorial.
-- 
Regards,

Diez B. Roggisch


From sjmachin at lexicon.net  Fri Feb 18 16:14:38 2005
From: sjmachin at lexicon.net (John Machin)
Date: 18 Feb 2005 13:14:38 -0800
Subject: selecting dictionaries to maximize counts
In-Reply-To: <oPGdnQfZXPnD0YvfRVn-oQ@comcast.com>
References: <oPGdnQfZXPnD0YvfRVn-oQ@comcast.com>
Message-ID: <1108761278.019612.279220@l41g2000cwc.googlegroups.com>


Steven Bethard wrote:
> I have a list of dictionaries.  Each dictionary holds counts of
various
> 'words', e.g.:

> Basically, I use a greedy approach -- adding a dict each time if I
can.
>   This leads to some suboptimal solutions given that, while the total

> counts must not exceed MAX_VALUE, I'd like them to be as close to
> MAX_VALUE as possible.  An example of data on which my select
function
> produces such a suboptimal solution:
>
> py> countdicts = [
> ...     dict(a=9, b=9, c=9),
> ...     dict(a=8, b=7),
> ...     dict(a=4, b=5, c=12)]
> py> select(countdicts, 12)
> [{'a': 9, 'c': 9, 'b': 9}]
>
> The better solution would have been to select the second two dicts --

> then all 'words' would have count 12.
>
> I don't need an optimal solution; in fact, the solution I have right
now
> is tolerable.  But if anyone knows a simple way to improve my
> performance, I'd appreciate it.  Thanks!

This is more than a bit OT but you've sucked me in :-)

You should specify a function that assigns a score to valid solutions;
it's not apparent from the wording above and the example exactly what
that function might be. Thinking through the alternatives might help
you solve the problem yourself :-)



From deetsNOSPAM at web.de  Fri Feb 11 15:20:15 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 11 Feb 2005 21:20:15 +0100
Subject: problem with tk and pass by refference (I think :)
References: <cuitgv$r4i$1@vegh.ks.cc.utah.edu>
	<cuiv3n$681$04$1@news.t-online.com>
	<cuj3os$1t2$1@vegh.ks.cc.utah.edu>
Message-ID: <cuj41r$muq$02$1@news.t-online.com>

> I tried it but I got a syntax error. The interpreter didn't like the
> equals sign in the lambda. I am using python 2.3.4. Is there another way
> of writing that?

Strange. This script works and shows the desired behaviour - python is also
2.3.4:

def foo(x):
    print x


fs = [lambda: foo(i) for i in xrange(5)]
for f in fs:
    f()

fs = [lambda x=i: foo(x) for i in xrange(5)]
for f in fs:
    f()


-- 
Regards,

Diez B. Roggisch


From __peter__ at web.de  Fri Feb 25 10:29:25 2005
From: __peter__ at web.de (Peter Otten)
Date: Fri, 25 Feb 2005 16:29:25 +0100
Subject: Is there way to determine which class a method is bound to?
References: <mailman.3053.1109342775.22381.python-list@python.org>
Message-ID: <cvng80$780$00$1@news.t-online.com>

Victor Ng wrote:

> I'm doing some evil things in Python and I would find it useful to
> determine which class a method is bound to when I'm given a method
> pointer.
> 
> For example:
> 
> class Foo(object):
>     def somemeth(self):
>         return 42
> 
> class Bar(Foo):
>     def othermethod(self):
>         return 42
> 
> 
> Is there some way I can have something like :
>   
>    findClass(Bar.somemeth)
> 
> that would return the 'Foo' class, and
> 
>    findClass(Bar.othermethod)
> 
> would return the 'Bar' class?
> 
> vic

>>> import inspect
>>> class Foo(object):
...     def foo(self): pass
...
>>> class Bar(Foo):
...     def bar(self): pass
...
>>> def get_imp_class(method):
...     return [t for t in inspect.classify_class_attrs(method.im_class) if
t[-1] is method.im_func][0][2]
...
>>> [get_imp_class(m) for m in [Bar().foo, Bar().bar, Bar.foo, Bar.bar]]
[<class '__main__.Foo'>, <class '__main__.Bar'>, <class '__main__.Foo'>,
<class '__main__.Bar'>]

but with this approach you will get into trouble as soon as you are using
the same function to define multiple methods. There may be something in the
inspect module more apt to solve the problem -- getmro() perhaps?

Peter





From steven.bethard at gmail.com  Sun Feb 13 15:44:23 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 13 Feb 2005 13:44:23 -0700
Subject: help please
In-Reply-To: <1108324679.451793.147890@z14g2000cwz.googlegroups.com>
References: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
	<TPKdnU2eEu9xPJPfRVn-vg@comcast.com>
	<1108260752.791847.180060@l41g2000cwc.googlegroups.com>
	<Z4ydnbKMDLVvEJLfRVn-hA@comcast.com>
	<1108324679.451793.147890@z14g2000cwz.googlegroups.com>
Message-ID: <i_ydnb41nJ68IZLfRVn-gw@comcast.com>

gargonx wrote:
> yes the items in std are always single to single, and ext single to
> double. basicly the ext are refernce to the std itmes. the second
> character in ext is a number depending on how far it is from the item
> in std. this is just a simple encoding program.

If your keys are always single characters (as this description seems to 
suggest) then the last code I posted should do what you want.  Repeated 
here for your enjoyment:

# merge mappings:
# std has highest precedence, then ext, then punc
replacements = {}
replacements.update(punc)
replacements.update(ext)
replacements.update(std)

# define encoding procedure
def proc(text):
     # replace each character with its replacement
     # or leave character unchanged if not in the mapping
     return ''.join([replacements.get(c, c) for c in text])

Steve


From xah at xahlee.org  Fri Feb  4 14:01:10 2005
From: xah at xahlee.org (Xah Lee)
Date: 4 Feb 2005 11:01:10 -0800
Subject: [perl-python] get web page programatically
Message-ID: <1107543599.362575.210730@o13g2000cwo.googlegroups.com>

# -*- coding: utf-8 -*-
# Python

# suppose you want to fetch a webpage.
from urllib import urlopen
print
urlopen('http://xahlee.org/Periodic_dosage_dir/_p2/russell-lecture.html').read()

# note the line
# from <library_name> import <function_name1,function_name2...>
# it reads the library and import the function name
# to see available functions in a module one can use "dir"
# import urllib; print dir(urllib)

# for more about this module import syntax, see
# http://python.org/doc/tut/node8.html

#---------------------
# sometimes in working with html pages, you need to creat links
# In url, some chars need to be encoded.
# the "quote" function does it. "unquote" function reverses it. Very
nice.

from urllib import quote
print quote("~joe's home page")
print 'http://www.google.com/search?q=' + quote("m?nage ? trois")
# (rely on the French to teach us interesting words)

# for more about the urllib module, see
# http://python.org/doc/lib/module-urllib.html

----------------------------
in perl, it's messy as usual. Long story short the simplest way is to
use the perl program HEAD or GET in /usr/bin or /usr/local/bin. When
one of the networking module is installed, perl contaminate your bin
dirs with these programs. In the unix shell, try
GET 'http://yahoo.com/'
should do the job. HEAD is similar for http
head. (assuming they are installed.)

if you need more complexty, perl has LWP::Simple and LWP::UserAgent to
begin with. (there are a host of spaghetti others) Both of these needs
to be installed extra. Perhaps consult your sys admin. The last time i
used them was some 2 years ago, so the following code is untested, but
should be it. I don't recall which one can't do what. Your milage may
vary.

use strict;
# use LWP::Simple;
use LWP::UserAgent;
my $ua = new LWP::UserAgent;
$ua->timeout(120);
my $url='http://yahoo.com/';
my $request = new HTTP::Request('GET', $url);
my $response = $ua->request($request);
my $content = $response->content();
print $content;
__END__

# note the above perl code. In many perl codes, they sport the Object
Oriented syntax, often concomitantly with a normal syntax version as
well.

----------------
this post is from the perl-python a-day mailing list. Please see
http://xahlee.org/perl-python/python.html

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From Scott.Daniels at Acm.Org  Tue Feb 22 10:40:24 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Tue, 22 Feb 2005 07:40:24 -0800
Subject: Problem with the sort() function
In-Reply-To: <mailman.2928.1109066131.22381.python-list@python.org>
References: <64827323f7134aea810788b3ec6cf516@localhost.talkaboutprogramming.com>
	<mailman.2928.1109066131.22381.python-list@python.org>
Message-ID: <421b4e54@nntp0.pdx.net>

Nick Coghlan wrote:
> 
> def mysort(iterable, cmp=None, key=None, reverse=False):
>     "return a sorted copy of its input"
>     if sys.version_info >= (2,4):
>         return sorted(iterable, cmp, key, reverse)
>     seq = list(iterable)
>     if reverse:
>         seq.reverse()        # preserve stability
>     if key is not None:
>         seq = [(key(elem), i, elem) for i, elem in enumerate(seq)]
>     seq.sort(cmp)
>     if key is not None:
>         seq = [elem for (key, i, elem) in seq]
>     if reverse:
>         seq.reverse()
>     return seq
> 

You'd be better off defining things once (and using the standard name)
rather than doing a test every time your function is called.
Something like:

     import sys
     ...
     if sys.version_info < (2, 3):
         def enumerate(iterable): # iterators not yet invented
             return zip(range(len(iterable)), iterable)

     if sys.version_info < (2, 4):
         def sorted(iterable, cmp=None, key=None, reverse=False):
             "return a sorted copy of its input"
             seq = list(iterable)
             if reverse:
                 seq.reverse()        # preserve stability
             if key is not None:
                 seq = [(key(elem), i, elem) for i, elem
                        in enumerate(seq)]
                 seq.sort(cmp)
             if key is not None:
                 seq = [elem for (key, i, elem) in seq]
             if reverse:
                 seq.reverse()
             return seq

If you like your names better, you can use:

     if sys.version_info >= (2, 4):
         mysort = sorted
     else:
         def mysort(iterable, cmp=None, key=None, reverse=False):
             ...

or even (if you can't be bothered to look up when features happened):

     try:
         test = enumerate
     except NameError:
         def enumerate(iterable):
             ...
     try:
         test = sorted
     except NameError:
         def sorted(iterable, cmp=None, key=None, reverse=False):
             ...


--Scott David Daniels
Scott.Daniels at Acm.Org


From bkc at Murkworks.com  Sat Feb 26 14:32:11 2005
From: bkc at Murkworks.com (Brad Clements)
Date: Sat, 26 Feb 2005 14:32:11 -0500
Subject: Leo 4.3-a3 Outlining IDE
References: <JcFTd.21785$Sl7.19428@fe03.lga>
Message-ID: <cvqik5$7dh$1@sea.gmane.org>

FYI,

After install and you run it for the first time (and if it asks for your
initials), then expect the plug-in manager to throw a bad window name error
in TK.

You must exit, then restart Leo before running the plugin manager after the
initial install.


-- 
Novell DeveloperNet Sysop #5





From exogen at gmail.com  Sun Feb 13 17:19:31 2005
From: exogen at gmail.com (Brian Beck)
Date: Sun, 13 Feb 2005 17:19:31 -0500
Subject: builtin functions for and and or?
In-Reply-To: <W4ydnarlcv0_TJLfRVn-3A@comcast.com>
References: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>
	<cuoiam$hfv$1@eeyore.INS.cwru.edu>
	<W4ydnarlcv0_TJLfRVn-3A@comcast.com>
Message-ID: <cuojv6$jnn$1@eeyore.INS.cwru.edu>

Steven Bethard wrote:
> Another alternative:
> 
> not False in (bool(x) for x in L)
> 
> Note that this should short-circuit, where min won't.
> 
> Steve

Whoops, for some reason the thought that short-circuiting didn't apply 
to And entered my mind while trying to post a nice solution. Hard to say 
why considering I have to do stuff like this on a daily basis!

Ignore mine except as a novelty, then.

--
Brian Beck
Adventurer of the First Order


From mahs at telcopartners.com  Mon Feb 14 18:43:03 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Mon, 14 Feb 2005 15:43:03 -0800
Subject: nested lists as arrays
In-Reply-To: <curap1$drt$1@sea.gmane.org>
References: <1108384089.804375.179130@f14g2000cwb.googlegroups.com><42109efc$0$23451$626a14ce@news.free.fr>	<1108402043.941832.34110@f14g2000cwb.googlegroups.com>
	<curap1$drt$1@sea.gmane.org>
Message-ID: <curcti$js2$1@sea.gmane.org>

Terry Reedy wrote:
> <benjamin.cordes at blawrc.de> wrote in message 
> news:1108402043.941832.34110 at f14g2000cwb.googlegroups.com...
> 
>>   def setRandomState(self):
>>      # container for the elements to pick from
>>      container = [1,2,3,4,5,6,7,8,-1]
>>
>>      # create elements of puzzle randomly
>>      i = 0
>>      j = 0
>>      while i <= self.dim-1:
>>          while j <= self.dim-1:
>>              if len(container) > 0:
>>                  randomindex = random.randint(0,len(container)-1)
>>                  self.elements[j][i] = container[randomindex]
>>                  del container[randomindex]
>>                  j=j+1
>>              else:
>>                  break
>>          j=0
>>          i=i+1
> 
> 
> Without reading closely, I believe that the above can generate any possible 
> position.  Are you aware that half are unsolvable?  If that matters, you 
> need to either find a book or site that explains the parity test for 
> solvability or generate the start position from the goal position by a 
> series of random moves.
> 
> Terry J. Reedy
> 
This covers the test for solvability - enjoy ;-): 
http://www.cs.tcd.ie/publications/tech-reports/reports.01/TCD-CS-2001-24.pdf

BTW, just because your puzzle looks like a grid doesn't neceesarily mean that 
representing the data as nested arrays is easiest.  A flat list might be just as 
good here.  It simplifies some of the operations (creating a random ordering 
becomes a one-liner), at the expense of a little more complexity in some others:

import random
class n2grid(object):
     """A grid for the n squared puzzle"""
     def __init__(self,dim = 4):
        self.cells = range(dim*dim)
        self.dim = dim
        self.pos = (0,0)
     def shuffle(self):
         random.shuffle(self.cells)
         self.pos = divmod(self.cells.index(0),self.dim)
     def show(self):
         for row in self._asarray():
             print "".join("[%2s]" % (cell or "") for cell in row)
     def _move(self,dy,dx):
         dim = self.dim
         cells = self.cells
         oldy, oldx = self.pos
         newy, newx = oldy + dy, oldx + dx
         if 0 <= newx < dim and 0 <= newy < dim:
             ix = newy * dim + newx
             ox = oldy * dim + oldx
             cells[ix], cells[ox] = cells[ox], cells[ix]
             self.pos = newy,newx
         else:
             raise Exception, "Illegal move to: (%s,%s)" % (newy, newx)
     def move(self, dx, dy):
         try:
             self._move(dx,dy)
             self.show()
         except:
             pass

     def _asarray(self): #create the array representation when needed
         cells = iter(self.cells)
         dim = self.dim
         return [[cells.next() for j in range(dim)] for i in range(dim)]

     def __repr__(self):
         return repr(self._asarray())




  >>> p = n2grid()
  >>> p.show()
  ...
[  ][ 1][ 2][ 3]
[ 4][ 5][ 6][ 7]
[ 8][ 9][10][11]
[12][13][14][15]
  >>> p.shuffle()
  >>> p.show()
[ 3][15][ 6][ 7]
[10][  ][12][ 5]
[ 4][ 1][14][ 8]
[ 2][11][13][ 9]
  >>> p.move(1,1)
[ 3][15][ 6][ 7]
[10][14][12][ 5]
[ 4][ 1][  ][ 8]
[ 2][11][13][ 9]
  >>> p.move(1,0)
[ 3][15][ 6][ 7]
[10][14][12][ 5]
[ 4][ 1][13][ 8]
[ 2][11][  ][ 9]
  >>> p.move(1,0) # illegal (does nothing)
  >>>

Cheers
Michael



From dave at pythonapocrypha.com  Fri Feb  4 15:57:46 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Fri, 04 Feb 2005 13:57:46 -0700
Subject: Possibly OT:  Controlling winamp with Python
In-Reply-To: <JZOdnVLIY48-S57fRVn-hA@comcast.com>
References: <JZOdnVLIY48-S57fRVn-hA@comcast.com>
Message-ID: <4203E1CA.3060705@pythonapocrypha.com>

Brent W. Hughes wrote:
> I'm running Windows XP and I'm using winamp to listen to internet radio 
> stations.  Occasionally, an annoying commercial will come on.  I would like 
> to write a Python program that, when run, will, in essence, push on winamp's 
> mute button.  Then, after say 20 seconds, it will push the mute button again 
> to restore the sound.  Is such a thing possible?

Yes - IIRC WinAmp supports some "global" Windows messages that any app can send 
to make WinAmp do different things. Don't know if there's a "mute" command, but 
at the very leasy you could control the volume. You'd have to read their SDK and 
then use something like ctypes to fire the Windows message - very doable.

If that doesn't do what you want, then you could go the more hacky route and 
grab the WinAmp window and fire a button click in the precise location. 
Something like AutoIt (which is controllable via Python) could work as well.

Another route would be to just mute all audio in the system for 20 seconds - 
that might be the easiest approach of all. Again, ctypes is your friend - figure 
out what APIs you'd need to call and people here can help you come up with the 
Python code to call those APIs.

-Dave


From fumanchu at amor.org  Sat Feb  5 16:01:40 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Sat, 5 Feb 2005 13:01:40 -0800
Subject: Python Processes for Win32
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E3398372@exchange.hqamor.amorhq.net>

harlinseritt at yahoo.com wrote:
> I have a daemon type script (daemon.py -- we'll say) that I would like
> to have run continuously. I'd like to be able to do something like
> this:
> 
> daemon.py start
> 
> ... and then to have it stop I'd like to do this:
> 
> daemon.py stop
> 
> I am having a hard time googling for a clue as to how to accomplish
> this. If anyone can point me in the right direction, I'd really
> appreciate it.

Write a Windows service (natively, see
http://www.python.org/windows/win32 or using py2exe, see
http://starship.python.net/crew/theller/py2exe/).

Then use:

net start daemonsvc
net stop daemonsvc


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org


From gb at cs.unc.edu  Thu Feb 10 13:44:42 2005
From: gb at cs.unc.edu (Gary Bishop)
Date: 10 Feb 2005 13:44:42 -0500
Subject: pyFMOD writing a callback function in Python
References: <370m88F525p5uU1@individual.net> <brasff8a.fsf@python.net>
Message-ID: <420bab9a_1@news.unc.edu>

Check out pySonic, a new FMOD wrapper written with Pyrex. Much more Pythonic.

gb




From rt-announce-bounces at lists.bestpractical.com  Fri Feb 11 22:33:09 2005
From: rt-announce-bounces at lists.bestpractical.com (rt-announce-bounces at lists.bestpractical.com)
Date: Fri, 11 Feb 2005 22:33:09 -0500
Subject: Your message to RT-Announce awaits moderator approval
Message-ID: <mailman.833.1108179189.22590.rt-announce@lists.bestpractical.com>

Your mail to 'RT-Announce' with the subject

    Delivery service mail

Is being held until the list moderator can review it for approval.

The reason it is being held:

    Post by non-member to a members-only list

Either the message will get posted to the list, or you will receive
notification of the moderator's decision.  If you would like to cancel
this posting, please visit the following URL:

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From kraus at hagen-partner.de  Thu Feb  3 03:30:29 2005
From: kraus at hagen-partner.de (Wolfram Kraus)
Date: Thu, 03 Feb 2005 09:30:29 +0100
Subject: python-2.4.msi installation issue
In-Reply-To: <1107412984.087664.308590@o13g2000cwo.googlegroups.com>
References: <1107412984.087664.308590@o13g2000cwo.googlegroups.com>
Message-ID: <ctsnf2$osk$1@ork-un.noris.net>

mirandacascade at yahoo.com wrote:
> O/S: Windows XP Home (with Service Pack 2)
> Downloaded python-2.4.msi from python.org (10,632KB).  When I double
> click on the file from Windows Explorer, the installation process
> presents the window in which I am prompted to either install for all
> users (the default) or install for just me.  I selected the defaulted
> value.  Installation process presents a window in which the user may
> select the directory for python 2.4 files.  I selected the default
> value of the Python24 folder.  After clicking Next, the process
> presents a window with the message, "Python 2.4 installer ended
> prematurely.  Python 2.4 ended prematurely because of an error.  Your
> system has not been modified.  To install this program at a later time,
> please run the installation again."
> 
> My question is this: how do I determine what the error was that caused
> the installation process to end prematurely?
> 
I have the same problem and don't know what's happening, but 
ActivePython worked for me. Get it here:
http://activestate.com/Products/ActivePython/

HTH,
Wolfram


From adam at cognitcorp.com  Tue Feb 15 19:19:32 2005
From: adam at cognitcorp.com (Adam DePrince)
Date: Tue, 15 Feb 2005 19:19:32 -0500
Subject: image fourier transform
In-Reply-To: <8u4311tfr8jrh5dv03389p2fhtk9jsl5v9@4ax.com>
References: <curv39$jsl$01$1@news.t-online.com>
	<8u4311tfr8jrh5dv03389p2fhtk9jsl5v9@4ax.com>
Message-ID: <1108513171.3859.95.camel@localhost.localdomain>

On Tue, 2005-02-15 at 01:18, Tim Roberts wrote:
> Johannes Ahl-mann <softpro at gmx.net> wrote:
> >i've been looking all around the net (google is my friend ;-) for a
> >module to apply fourier transformations on images. the different ones in
> >numerical python and scientific python seem all to be operating on
> >sequences and therefore seem to be 1D fourier transform.
> >anyone know a library/module to do 2D image FFT in a simple manner.
> >or am i just too dumb to see how this is supposed to work with the 1D
> >fourier transforms??
> To do a 2D FFT on a matrix X, you do 1D FFTs on all the rows, producing X',
> then you do 1D FFTs on all the columns of X'.
> So, for a 32x32 2D FFT, you'll end up doing 64 1D FFTs.

FFTW: http://www.fftw.org/
Python bindings for it: http://pylab.sourceforge.net/

Adam DePrince 




From rkern at ucsd.edu  Thu Feb  3 22:58:27 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Thu, 03 Feb 2005 19:58:27 -0800
Subject: Reinstall python 2.3 on OSX 10.3.5?
In-Reply-To: <36fj01F508ugpU1@individual.net>
References: <mailman.1792.1107403740.22381.python-list@python.org>
	<ctsl83$s1q$1@news1.ucsd.edu> <36fj01F508ugpU1@individual.net>
Message-ID: <cturt0$5gl$1@news1.ucsd.edu>

Jorl Shefner wrote:

>  I use a version of 2.3.4 on my Os X system that I installed myself 
> without any apparent loss of functionality.  What extra advantages is 
> the Apple installed version supposed to provide? 

Currently, Apple uses Python and the CoreGraphics wrappers (which aren't 
in the standard distribution) for it's fax software, I believe. If you 
don't use the fax software, you probably won't notice a difference while 
you continue to use Panther. Of course, Apple may utilize Python more in 
future versions of OS X, so I continue to strongly recommend not 
deleting the Python that they provide.

Future releases of Python should be easier to install *alongside* 
Apple's Python.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From tjreedy at udel.edu  Mon Feb 14 20:26:42 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 14 Feb 2005 20:26:42 -0500
Subject: Iterator / Iteratable confusion
References: <420a5c1e$0$21630$a1866201@visi.com><200502131958.27410.francis.girard@free.fr><cuolu7$qv7$1@sea.gmane.org>
	<200502142131.53265.francis.girard@free.fr>
Message-ID: <curj01$1vk$1@sea.gmane.org>


"Francis Girard" <francis.girard at free.fr> wrote in message 
news:200502142131.53265.francis.girard at free.fr...

(Note for oldtimer nitpickers: except where relevant, I intentionally 
ignore the old and now mostly obsolete pseudo-__getitem__-based iteration 
protocol here and in other posts.)

Le dimanche 13 F?vrier 2005 23:58, Terry Reedy a ?crit :
>> Iterators are a subgroup of iterables. Being able to say iter(it) 
>> without
>> having to worry about whether 'it' is just an iterable or already an
>> iterator is one of the nice features of the new iteration design.

>I have difficulties to represent an iterator as a subspecie of an 
>iteratable

You are not the only one.  That is why I say it in plain English.

You are perhaps thinking of 'iterable' as a collection of things.  But in 
Python, an 'iterable' is a broader and more abstract concept: anything with 
an __iter__ method that returns an iterator.

To make iterators a separate, disjoint species then requires that they not 
have an __iter__ method.  Some problems:
A. This would mean either
    1) We could not iterate with iterators, such as generators, which are 
*not* derived from iterables, or, less severely
    2) We would, usually, have to 'protect'  iter() calls with either 
hasattr(it, '__iter__') or try: iter(it)...except: pass with probably no 
net average time savings.
B. This would prohibit self-reiterable objects, which require .__iter__ to 
(re)set the iteration/cursor variable(s) used by .next().
C. There are compatibility issues not just just with classes using the old 
iteration protocol but also with classes with .next methods that do *not* 
raise StopIteration.  The presence of .__iter__ cleanly marks an object as 
one following the new iterable/iterator protocol.  Another language might 
accomplish the same flagging with inheritance from a base object, but that 
is not Python.

> [snip]...C++ STL where there is a clear (I resist to
> say "clean") distinction between iteratable and iterator.

leaves out self-iterating iterables -- collection objects with a .next 
method.  I am sure that this is a general, standard OO idiom and not a 
Python-specific construct.  Perhaps, ignoring these, you would prefer the 
following nomenclature:
iterob   = object with .__iter__
iterable= iterob without .next
iterator = iterob with .next

Does STL allow/have iterators that are *not* tied to an iterable?

>One of the result of not distinguishing them is that, at some point in 
>your
>programming, you are not sure anymore if you have an iterator or an
>iteratable ; and you might very well end up calling "iter()" or
> "__iter__()" everywhere.

If you iterate with a while loop just after creating a new iterable or 
iterator, then you probably do know which it is and can make the iter() 
call only if needed.  If you while-iterate with a function argument, then 
iter() is a simpler way to be generic than the alternatives in A2 above.

>I am not concerned with the small performance issue involved here

Good.  I think there are small.  The number and time for iterations is far 
more important.

> (as I very seldom am) but with clarity. After all, why should you have to 
>  > call __iter__ on an iterator you just constructed

As I said above, you don't, and most people wouldn't.  The function 
implementing for loops does because *it*, unlike you, only sees the object 
passed and not the code that created the object!

>I have a strong feeling that the problem arises from the difficulty to
> marry the familiar ""for ... in ..."" construct with iterators. [snip]

What difficulty?  For loops accept an iterable and iterate with the derived 
iterator.

Would you really prohibit the use of for loops with generators and other 
non-iterable-derived iterators?  See A1 above.

>To have iterators act as iteratables might very well had been a 
> >compromise to solve the problem.

I think it elegant.  See below.

>I am not sure at all that this is a "nice feature" to consider an iterator 
>at
>the same level that an iteratable.

I think you are too stuck in the STL model.

> It makes it a bit more akward to have the
>"mind impulse", so to speak, to build iterators on top of other iterators 
>to > slightly modify the way iteration is done.

On the contrary, what could be more elegant than
def itermodifier(it):
  for i in it: # where it is often an iterator
     yield modification-of-i
See the itertools module and docs and the examples of chaining iterators.

Terry J. Reedy





From onurb at xiludom.gro  Mon Feb 21 05:28:14 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Mon, 21 Feb 2005 11:28:14 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cv7i57$d0v$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr>
Message-ID: <4219b7c0$0$29993$636a15ce@news.free.fr>

Ilias Lazaridis wrote:
> 
> Should a professional developer take python serious?

A *professionnal developper*, yes. But this is irrelevant to you.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for 
p in 'onurb at xiludom.gro'.split('@')])"


From steven.bethard at gmail.com  Thu Feb 10 02:54:37 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 10 Feb 2005 00:54:37 -0700
Subject: convert list of tuples into several lists
In-Reply-To: <1107998078.610891.111510@z14g2000cwz.googlegroups.com>
References: <cud40u$vqb$01$1@news.t-online.com>
	<36uihlF58p63iU1@individual.net>
	<1107998078.610891.111510@z14g2000cwz.googlegroups.com>
Message-ID: <QrOdnf4DLK2hjpbfRVn-hw@comcast.com>

Cappy2112 wrote:
> What does the leading * do?

Tells Python to use the following iterable as the (remainder of the) 
argument list:

py> def f(x, y):
...     print x, y
...
py> f([1, 2])
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
TypeError: f() takes exactly 2 arguments (1 given)
py> f(*[1, 2])
1 2
py> f(1, [2])
1 [2]
py> f(1, *[2])
1 2

Note that whenever the leading * is present, the following list gets 
expanded into the positional arguments of f -- x and y.

Steve


From rigga at hasnomail.com  Tue Feb 15 16:21:47 2005
From: rigga at hasnomail.com (Rigga)
Date: Tue, 15 Feb 2005 21:21:47 GMT
Subject: How can I Fill in web form and post back
Message-ID: <LJtQd.2010133$B07.305765@news.easynews.com>

Hi,

I am looking for the best way to use Python to get a web page, look for some
particular fields on a form, fill in the fields and submit the form but I
have no idea where to start - any pointers appreciated

many thanks

Rigga


From lbates at syscononline.com  Wed Feb  9 11:46:12 2005
From: lbates at syscononline.com (Larry Bates)
Date: Wed, 09 Feb 2005 10:46:12 -0600
Subject: Datatype of non-negative values
In-Reply-To: <a37aa972.0502090551.42319b92@posting.google.com>
References: <a37aa972.0502090551.42319b92@posting.google.com>
Message-ID: <0q2dnRpPIs3Jo5ffRVn-rw@comcast.com>

What exactly do you want to happen when result
would be negative?  I'll guess be zero:

pseudocode:

x=value
x=max(x-something, 0)

That way if it goes negative, it sticks to zero.

Larry Bates


Dirk Hagemann wrote:
> Hi,
> 
> Is there a datatype in python which allows no negative values? I
> subtract several times something from a value and I don't want to chek
> everytime if this value is still bigger or equal 0.
> 
> Thanks for help!
> Dirk Hagemann


From peter at engcorp.com  Fri Feb 11 21:27:12 2005
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 11 Feb 2005 21:27:12 -0500
Subject: Python UPS / FedEx Shipping Module
In-Reply-To: <mailman.2411.1108149803.22381.python-list@python.org>
References: <mailman.2411.1108149803.22381.python-list@python.org>
Message-ID: <MKSdnYmccMhm9JDfRVn-hg@powergate.ca>

Gabriel Cooper wrote:
> I've made UPS and FedEx shipping rate request modules in python using 
> XML. Is there an interest in putting this on the web?

I'd be interested in at least looking at them, hoping to learn
something of value, even if I don't have (or believe I don't have)
any current use for them.

-Peter


From ilias at lazaridis.com  Thu Feb 17 12:43:08 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Thu, 17 Feb 2005 19:43:08 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2653.1108504161.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr>	<cupstp$an7$2@ctb-nnrp2.saix.net>	<cupupa$kfs$2@usenet.otenet.gr>	<cupvhi$c15$1@news1.ucsd.edu>	<cuq084$r99$1@usenet.otenet.gr>	<cuq2h0$j2s$1@eeyore.INS.cwru.edu>	<cuq57b$j83$1@usenet.otenet.gr>	<37bkemF5a7s7vU1@individual.net>	<cut6nh$rpk$1@usenet.otenet.gr>	<86ll9piuj8.fsf@guru.mired.org>	<cutf1h$576$1@usenet.otenet.gr>	<mailman.2644.1108496325.22381.python-list@python.org>	<cutk8f$qu2$1@usenet.otenet.gr>
	<mailman.2653.1108504161.22381.python-list@python.org>
Message-ID: <cv2l3c$cat$1@usenet.otenet.gr>

Joe Francia wrote:
[...]

http://groups-beta.google.com/group/comp.lang.python/msg/f2ae9cdbe16676d1

.

-- 
http://lazaridis.com


From phillip.watts at anvilcom.com  Fri Feb 25 12:00:41 2005
From: phillip.watts at anvilcom.com (phil)
Date: Fri, 25 Feb 2005 11:00:41 -0600
Subject: Fonts
Message-ID: <421F59B9.5090400@anvilcom.com>

I'm cpmpletely lost on fonts.

I'm using Tkinter

I do medarial = '-*-Arial-Bold-*-*--24-*-*-*-ISO8859-1"
or Courier or Fixed in various sizes.

Works great on my RH 7.2

But a small embedded system Im working on, nothing seems to work,
almost everything falls back to a fixed 12

The X*4 fontpaths are the same and all the fonts,
75, 100, misc Speedo, PEX, etc are there.

There is something wrong with where the fonts are.
Help?



From gabriel.barros at gmail.com  Fri Feb 18 12:08:37 2005
From: gabriel.barros at gmail.com (Gabriel B.)
Date: Fri, 18 Feb 2005 15:08:37 -0200
Subject: DB Schema
Message-ID: <5175a81c05021809086893d86e@mail.gmail.com>

I started to use dbschema.com but it has some big flaws (mainly
regarding keys and mysql) and besides it's being in java (wich i don't
like to code at all) it's closed source.

I'm considering starting a new GPL one in python, so, i ask if you
people already know a project like that.

Thanks,
Gabriel


From ncoghlan at iinet.net.au  Sat Feb 19 22:05:52 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 20 Feb 2005 13:05:52 +1000
Subject: unicode encoding usablilty problem
In-Reply-To: <d5uxzk7q.fsf@python.net>
References: <opsmekm2ei6yt6e7@news.cisco.com>	<42164d01$0$4676$9b622d9e@news.freenet.de>
	<d5uxzk7q.fsf@python.net>
Message-ID: <4217FE90.7080504@iinet.net.au>

Thomas Heller wrote:
> =?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?= <martin at v.loewis.de> writes:
> 
> 
>>We have come up with a transition strategy, allowing existing
>>libraries to widen their support from byte strings to character
>>strings. This isn't a simple task, so many libraries still expect
>>and return byte strings, when they should process character strings.
>>Instead of breaking the libraries right away, we have defined
>>a transitional mechanism, which allows to add Unicode support
>>to libraries as the need arises. This transition is still in
>>progress.
>>
>>Eventually, the primary string type should be the Unicode
>>string. If you are curious how far we are still off that goal,
>>just try running your program with the -U option.
> 
> 
> Is it possible to specify a byte string literal when running with the -U option?

Not that I know of. If the 'bytes' type happens, then I'd be a fan of b"" to get 
a byte string instead of a character string.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From wangtianthu at gmail.com  Thu Feb  3 17:04:07 2005
From: wangtianthu at gmail.com (Tian)
Date: 3 Feb 2005 14:04:07 -0800
Subject: pyFMOD problem
In-Reply-To: <wttqav99.fsf@python.net>
References: <39d7536d.0502021515.6c9c5c07@posting.google.com>
	<wttqav99.fsf@python.net>
Message-ID: <1107468247.966357.45190@l41g2000cwc.googlegroups.com>

I think I did have put the DLL file in the correct place, but I still
cannot make it work. same problem. I checked my version of pyfmod,
ctypes, they are all the newest one. can you tell me the version you
are using? Thanks



From snacktime at gmail.com  Thu Feb  3 16:26:09 2005
From: snacktime at gmail.com (snacktime)
Date: Thu, 3 Feb 2005 13:26:09 -0800
Subject: bytecode obfuscation
Message-ID: <1f060c4c05020313268582f6d@mail.gmail.com>

I am attempting to put together and open source project, but some of
the libraries cannot be open source due to non disclosure agreements. 
The non disclosures specifically specify that the implementation of
their api's can only be distributed as object code.  I might be able
to get them to agree to bytecode, but probably only if I can obfuscate
it in some way, or show that it is very difficult to turn the bytecode
back into python source code.

How difficult is it to turn python bytecode into it's original source?
 Is it that much different than java (this is what they will probably
compare it to) ?

Also, I'm curious how much demand their is for this application in the
Python world.  The application replaces online credit card
processors(Verisign, Authorizenet) by providing a platform that
connects directly to the bank networks for credit card processing, and
also provides other features such as recurring billing, reporting,
etc..  Everything except the libraries that actually connect to the
bank networks would be open source, and those libraries aren't
something that you would even want to touch anyways.


From mike at teczno.com  Sun Feb 20 15:26:40 2005
From: mike at teczno.com (Michal Migurski)
Date: Sun, 20 Feb 2005 12:26:40 -0800
Subject: Moving to Python from PHP - 3 questions
Message-ID: <412069471cbf9643702ccd2dc6199dad@teczno.com>

Hi everyone,

I've been planning to move to Python from PHP for some time now. I use 
PHP extensively for web scripting, with mod_php, Apache, and a DB (I 
would characterize my knowledge of PHP as advanced). Here are three 
stumbling blocks I've experienced, for which I couldn't seem to find 
any helpful information via Google:

1) Mod_python on OSX. I use a Mac as my primary development 
environment, so I need mod_python to get anything done. Compiling 
mod_python from source fails under OSX 10.3, and mod_python does not 
appear to be included in Fink. I've found plenty of other questions 
about this on other mailing lists, but so far no conclusive answers - 
is mod_python on OSX currently a dead-end?

2) Session management. Cookie-based sessions in PHP are pretty 
transparent, with a small library of basic functions that do 95% of 
what anyone may need to store session data in serialized files and 
associate them with cookies. I've seen python code that accomplishes 
this, but so far no pre-built server-side session management modules.

3) Structured request variables. PHP has a really handy feature where 
request variables with name like "foo[]", "foo[bar]", or 
"foo[bar][baz]" are automatically structured into nested associative 
arrays. I can see that the python cgi module will make a list of 
MiniFieldStorage objects when more than one variable with the same name 
is provided, but that's about the extent of it that I've seen.

2 & 3 are problems I can solve on my own, but they're so transparently 
automatic in PHP that it's a real pleasure to use them. I can probably 
implement my own fixes, but I'd rather not have to. Alternatively, are 
these just "PHP-isms" for which python has a more native, more 
appropriate response?

An "RTFM" answer with a URL for the M would be great. :)

Thank you,
-mike.

------------------------------------------------------
michal migurski- contact info, blog, and pgp key:
sf/ca            http://mike.teczno.com/contact.html



From steven.bethard at gmail.com  Thu Feb 17 14:47:11 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 17 Feb 2005 12:47:11 -0700
Subject: check if object is number
In-Reply-To: <mailman.2765.1108664832.22381.python-list@python.org>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>	<374t0mF4te5vbU1@individual.net>	<7tOdnYs6NtrV7JDfRVn-vQ@powergate.ca>	<mLKdnbj4O4gQH5DfRVn-iA@comcast.com>	<mailman.2456.1108249466.22381.python-list@python.org>	<tKidnT6fyKm_DpPfRVn-pA@comcast.com>	<mailman.2459.1108252868.22381.python-list@python.org>	<2j89115tsnur135nfm06lh509482mdb16h@4ax.com>
	<mailman.2765.1108664832.22381.python-list@python.org>
Message-ID: <g-Gdndu0CJYgaYnfRVn-sg@comcast.com>

Michael Spencer wrote:
> Christos TZOTZIOY Georgiou wrote:
> 
>> On Sat, 12 Feb 2005 16:01:26 -0800, rumours say that Michael Spencer
>> <mahs at telcopartners.com> might have written:
>>
>>> OK - then my entry is:
>>>     assert obj+1 >= 1
>>> :-)
>>
>> So -1 is not a number.
> 
> At least not a legal one for Steven's function as I understood it

No, -1 is still a "number" for my particular case.

Basically, I want "numbers" to be valid upper bounds to an increasing 
sequence of integers.  This means that "numbers" must be comparable to 
integers and must behave properly as upper bounds to integers.  More 
formally:

If n is a "number" (in my particular sense), then there exists an 
integer i such that i > n, and for all integers i such that i > n and 
for all positive integers x, i + x > n.

STeVe


From eurleif at ecritters.biz  Tue Feb 22 05:12:02 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Tue, 22 Feb 2005 05:12:02 -0500
Subject: Accessing files installed with distutils
In-Reply-To: <mailman.2906.1109026485.22381.python-list@python.org>
References: <mailman.2906.1109026485.22381.python-list@python.org>
Message-ID: <380enfF5il37rU1@individual.net>

Frans Englich wrote:
> This is silly. How do I access data files I've installed with distutils? In a 
> portable, generic way, I want to find out what is the following path on most 
> systems:
> 
> /usr/local/lib/python2.4/lib/site-packages/foo/bar.txt

Assuming your module is also in site-packages/foo, I would use:

import os
filename = os.path.join(os.path.dirname(__file__), 'bar.txt')


From pyguy2 at gmail.com  Wed Feb 16 11:30:46 2005
From: pyguy2 at gmail.com (pyguy2 at gmail.com)
Date: 16 Feb 2005 08:30:46 -0800
Subject: low-end persistence strategies?
In-Reply-To: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
Message-ID: <1108571446.639313.268820@g14g2000cwa.googlegroups.com>

People sometimes run to complicated systems, when right before you
there is a solution. In this case, it is with the filesystem itself.

It turns out mkdir is an atomic event (at least on filesystems I've
encountered).  And, from that simple thing, you can build something
reasonable as long as you do not need high performance. and space isn't
an issue.

You need a 2 layer lock (make 2 directories) and you need to keep 2
data files around plus a 3rd temporary file.

The reader reads from the newest of the 2 data files.

The writer makes the locks, deletes the oldest data file and renames
it's temporary file to be the new data file.                 You could
have the locks expire after 10 minutes, to take care of failure to
clean up.  Ultimately, the writer is responsible for keeping the locks
alive. The writer knows it is his lock because it has his timestamp.
If the writer dies, no big deal, since it only affected a temporary
file and the locks will expire.

Rename the temporary file  takes advantage of the fact that  a rename
is essentially immediate. Since, whatever does the reading, only reads
from the newest of the 2 files (if both are available).  Once, the
rename of the temporary file done by the writer is complete, any future
reads will now hit the newest data. And, deleting the oldest file
doesn't matter since the reader never looks at it.

If you want more specifics let me know.

john



From curty at free.fr  Fri Feb 11 15:45:02 2005
From: curty at free.fr (Curt)
Date: 11 Feb 2005 20:45:02 GMT
Subject: A great Alan Kay quote
References: <420a5c1e$0$21630$a1866201@visi.com>
	<mailman.2270.1107980587.22381.python-list@python.org>
	<cpkl01hg54cbp9mjnnkevbn0chps4psam2@4ax.com>
	<mailman.2332.1108063164.22381.python-list@python.org>
Message-ID: <slrnd0q67t.52v.curty@einstein.electron.net>

On 2005-02-10, Francis Girard <francis.girard at free.fr> wrote:
>
> I think I've been enthouasistic too fast. While reading the article I grew 
> more and more uncomfortable with sayings like :

<snip>

Yes, you may have grown uncomfortable because what you "read" has, at best,
only the most tenuous of relations with what was written.  There is no way
in God's frigid hell that your "sayings" (which were never uttered by Alan
Kay) can be construed as anything other than a hopefully transient
psychotic episode by anyone who read the interview with his head in a place
other than where the moon doesn't shine.

Please be so kind as to free your own from the breathless confines of your 
own fundamental delirium.


From jeff at ccvcorp.com  Tue Feb 15 15:16:38 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Tue, 15 Feb 2005 12:16:38 -0800
Subject: Variables.
In-Reply-To: <4211f87e$0$16331$636a15ce@news.free.fr>
References: <614c778e.0502150429.1a2a4d8d@posting.google.com>
	<4211f87e$0$16331$636a15ce@news.free.fr>
Message-ID: <1114m2urmov6ec7@corp.supernews.com>

bruno modulix wrote:

> administrata wrote:
> 
>> I wrote this, It's a bit lame though
>>
> (snip code - see other answers in this thread)
> 
>> raw_input("\n\\t\t\t- The End -")
> 
> 
> Why on earth are you using raw_input() here ?

This is a fairly common idiom, on Windows at least.  If running a 
console app from Explorer, the console will close as soon as the app 
terminates.  Using raw_input() at the end of the app means that it 
won't close until the user hits Enter.

>> HELP plz
> 
> No one can help you if you don't explain your problem. We are not 
> psychic enough to read your mind !-)

Indeed -- it looks like this worked perfectly to me, so the issue is 
in what's expected.  :)

Jeff Shannon
Technician/Programmer
Credit International



From e at e.e  Tue Feb  8 20:42:25 2005
From: e at e.e (e)
Date: Tue, 8 Feb 2005 17:42:25 -0800
Subject: Lambda
Message-ID: <7UdOd.109$0b3.4707@news.uswest.net>

here's what is probably an unusual question: 




From dotpyFE at gmail.com  Thu Feb 17 08:03:50 2005
From: dotpyFE at gmail.com (Lucas Raab)
Date: Thu, 17 Feb 2005 13:03:50 GMT
Subject: [newbie]How to install python under DOS and is there any
 Wxpython can be installed under dos?
In-Reply-To: <zkZQd.9062$Sl3.275762@news4.e.nsc.no>
References: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
	<1108557065.547230.254540@z14g2000cwz.googlegroups.com>
	<b9-dnTQOwoYK647fRVn-2Q@rogers.com>
	<11172sa1sg2svc8@corp.supernews.com>
	<l4OdneC_7ZH2oInfRVn-3A@rogers.com>
	<zkZQd.9062$Sl3.275762@news4.e.nsc.no>
Message-ID: <WC0Rd.5165$VI5.2979@newsread3.news.atl.earthlink.net>

Leif B. Kristensen wrote:
> john san skrev:
> 
> 
>>Actually the "windows" running very good under the xbox-NTOS via
>>xboxmediacenter. its just limited functions(not easy to programming
>>the "windows" prog.), if we can find WxPython-like can be ported (I
>>can import *
>>from it  to my xboxPython) )it will be a great great ......... You
>>will have HD screen and web surfing on HDTV and computing on HDTV.
>>think about it! That is a real thing the python-like lang. should to
>>do otherwise just a garbage(toy).
> 
> 
> You can run Linux with MythTV on an XBox. Does all the things you want,
> and of course it will run WxPython.

But does that involve modding the Xbox?? As in messing with the hardware??


From hakan at zyberit.com  Fri Feb  4 06:01:35 2005
From: hakan at zyberit.com (=?ISO-8859-1?Q?H=E5kan_Persson?=)
Date: Fri, 04 Feb 2005 12:01:35 +0100
Subject: Converting a string to a function pointer
Message-ID: <4203560F.9030506@zyberit.com>

Hi.

I am trying to "convert" a string into a function pointer.
Suppose I have the following:

from a import a
from b import b
from c import c

funcString = GetFunctionAsString()

and funcString is a string that contains either "a", "b" or "c".
How can I simply call the correct function?
I have tried using getattr() but I don't know what the first (object) 
argument should be in this case.

Thanks,
H?kan Persson




From james.kew at gmail.com  Thu Feb 24 12:41:56 2005
From: james.kew at gmail.com (James Kew)
Date: Thu, 24 Feb 2005 09:41:56 -0800
Subject: Shift Confusion
References: <1109225214.430739.259600@l41g2000cwc.googlegroups.com>
	<pj0s11p3dn5o9nldsiklptce6j9ts26utf@4ax.com>
Message-ID: <cvl3jj$j7m$1@news.astound.net>

"Dennis Lee Bieber" <wlfraed at ix.netcom.com> wrote in message 
news:pj0s11p3dn5o9nldsiklptce6j9ts26utf at 4ax.com...
> On 23 Feb 2005 22:06:54 -0800, "Kamilche" <klachemin at comcast.net>
> declaimed the following in comp.lang.python:
>
>>
>> Essentially, it should be possible to use a 'packed string' format in
>> Python, where as long as the characters you're sending are in the ASCII
>> range 0 to 127, two will fit in a byte.
>>
> Pardon? You are going to fit TWO 7-bit values into one 8-bit?

Quite. Although you can sort of see how one might naively arrive at this 
conclusion: one 7-bit char takes 0...127, which when you put it into an 
8-bit byte leaves 128...255 unused for a second char....

James




From vegeta.z at gmail.com  Wed Feb  9 03:09:36 2005
From: vegeta.z at gmail.com (vegetax)
Date: Wed, 09 Feb 2005 08:09:36 -0000
Subject: wrapper classes question
Message-ID: <cucgab$s7g$1@sea.gmane.org>

Hi i made a wrapper class for handling file and dir operations and i wonder,
 whats the performance penalty for making such wrapper classes? here it is:

##################################
import os

class File(object):

    #access modes
    F_OK = os.F_OK,
    W_OK = os.W_OK,
    R_OK = os.R_OK,
    X_OK = os.X_OK
     
        
    def __init__(s,pathToFile):

 s.path = pathToFile
 s.name = os.path.basename(s.path)
 s.dirName = os.path.dirname(s.path)
 #s.size = path.getsize(s.path)

    
    def size(s):
 return os.path.getsize(s.path)
    
    def open(s,mode='r'):
 return open(s.path,mode)

    def openw(s):
 return open(s.path,'w')

    def access(s,mode):
 return os.access(s.path,mode)
    
    def abspath(s):
 return os.path.abspath(s.path)

    def getatime(s):
 return os.path.getatime(s.path)
    
    def getctime(s):
 return os.path.getctime(s.path)
    
    def isabs(s):
 return os.path.isabs(s.path)

    def isfile(s):
 return os.path.isfile(s.path)

    def isdir(s):
 return os.path.isdir(s.path)

    def ext(s):
 return os.path.splitext(s.path)[1]

    def stat(s):
 return os.stat(s.path)
    
    def access(s,mode):
 return os.access(s.path,mode)

def chdir(path) : os.chdir(path)

def cwd() : return os.getcwd()

def chmod(path,mode): return os.chmod(path,mode)

def chown(path,uid,gid): os.chown(path,uid,gid)

def ln(src,dest): os.symlink(src,dest)

def ls(path): return os.listdir(path)

def mkdir(path,rec=False,mode = 0777) : 
    if not rec:
        os.mkdir(path,mode)
    else:
 os.makedirs(path,mode)

def rm(path):    os.remove(path)

def rename(old,new): os.rename(old,new)

def rmdir(path): os.rmdir(path)

def xremove(path) : 
    'just unix'
    os.system('rm -rf %s' % path)

def utime(path,times=None):
    'set times of a file\
    times = tuple like (atime,ctime) '
    os.utime(path,times)

if __name__ == '__main__':
    
    f = File('/tmp')
    print f.isfile()
    print f.isdir()
    print f.size()
    print ls('/tmp')



From pobrien at orbtech.com  Mon Feb 14 14:00:25 2005
From: pobrien at orbtech.com (Pat)
Date: 14 Feb 2005 11:00:25 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr><cupupa$kfs$2@usenet.otenet.gr>
	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>
	<cuqqqi$ep1$1@ctb-nnrp2.saix.net>
Message-ID: <1108407625.250592.104280@c13g2000cwb.googlegroups.com>

Actually, no.  We ran into some issues with Python 2.4 that caused us
to return to Python 2.3.5.  But I would really like to upgrade to
Python 2.4.  So I started researching the subject before I did
anything.

If you are telling me that minGW can compile extensions that are
compatible with the Python 2.4 that uses msvcr71.dll, then that is good
news indeed.  Is there anything that needs to be configured or patched
to make this happen?  And how does minGW know which dll to link?  What
if I have both versions of Python installed - 2.3.5 and 2.4?  Is there
an easy way to detect this and switch between the two dlls?

If I'm asking questions already answered elsewhere, I'd love a link to
that resource, if you have it.

Thanks,

Pat

Patrick K. O'Brien
Orbtech    http://www.orbtech.com
Schevo     http://www.schevo.org
Pypersyst  http://www.pypersyst.org



From robin at SPAMREMOVEjessikat.fsnet.co.uk  Wed Feb 23 05:51:46 2005
From: robin at SPAMREMOVEjessikat.fsnet.co.uk (Robin Becker)
Date: Wed, 23 Feb 2005 10:51:46 +0000
Subject: Attaching to a Python Interpreter a la Tcl
In-Reply-To: <1109155068.468295.121630@f14g2000cwb.googlegroups.com>
References: <1109155068.468295.121630@f14g2000cwb.googlegroups.com>
Message-ID: <421C6042.8060608@jessikat.fsnet.co.uk>

DE wrote:
> Hello,
> 
> Some long time ago, I used to use Tcl/Tk. I had an tcl embedded into my
> app.
> 
> The coolest thing was however, I was able to attach to the interpreter
> (built in to my app) via a tcl shell in which I could type in regular
> tcl code which would be interpreted by the interpreter of my
> application. Naturally, it was possible to call tcl functions of my
> applications.
> 
> Some kind of rapid RPC.
> 
> Is this also possible with python ?
> 
> Thanks,
> 
I think you are talking about the tk send command which allows for 
communicating with a known app.

I don't believe python comes with such a facility without some coding, 
but it has been implemented in various ways using sockets etc etc.

I seem to remember that modern idle uses an rpc technique for debugging.

There are several python projects which address interprocess 
communication pyro http://pyro.sourceforge.net/ is a good example.
-- 
Robin Becker


From fuzzyman at gmail.com  Tue Feb 22 05:25:55 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 22 Feb 2005 02:25:55 -0800
Subject: Memory Based File Objects
In-Reply-To: <f11c8440.0502220206.56d908ce@posting.google.com>
References: <f11c8440.0502220206.56d908ce@posting.google.com>
Message-ID: <1109067955.900319.159840@o13g2000cwo.googlegroups.com>

Quick reply... check out the StringIO module....

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From http  Mon Feb 14 17:18:16 2005
From: http (Paul Rubin)
Date: 14 Feb 2005 14:18:16 -0800
Subject: parsing IMAP responses?
References: <42111b20$0$44604$a1866201@visi.com>
Message-ID: <7x7jlazsyf.fsf@ruckus.brouhaha.com>

Grant Edwards <grante at visi.com> writes:
> The imaplib module return values are mostly useless as-is:
> they're just whatever string the server sent (or in some cases
> a list of strings).  You've got to parse them using the IMAP
> syntax before you can do much with them. 
> 
> Is there a library somewhere that impliments the IMAP protocol
> syntax?

It's very messy.  I don't know of one that's in distribution.  I think
there's one buried inside a certain commercial product.  I wrote one a
while back that is currently inaccessible (disk crash, need to get it
recovered) but it's not really useable.  IMAP syntax is very very messy.
Are you trying to write an IMAP server?


From usenet_spam at janc.invalid  Wed Feb  9 07:24:34 2005
From: usenet_spam at janc.invalid (JanC)
Date: Wed, 09 Feb 2005 12:24:34 GMT
Subject: Big development in the GUI realm
References: <mailman.2123.1107820051.22381.python-list@python.org>
	<4208373e$0$21620$a1866201@visi.com> <cu9eg0$9jb$1@news1.ucsd.edu>
	<mailman.2145.1107846160.22381.python-list@python.org>
Message-ID: <Xns95F88867EF3E8JanC@213.118.79.171>

Francis Girard schreef:

> Did some law court, over the past 
> decade, had to make a decision about GPL on some real issue ? 

netfilter vs. Sitecom ?

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From bvande at po-box.mcgill.ca  Fri Feb  4 22:21:47 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Fri, 04 Feb 2005 22:21:47 -0500
Subject: broke IDLE while defining a key-binding scheme
Message-ID: <42043BCB.9090902@po-box.mcgill.ca>

Hi all,

IDLE refuses to launch, and I believe it is because I attempted to 
define a custom key-binding that it doesn't like.

I was recently defining a custom keybinding in IDLE 1.1 under Python 
2.4 on WinMe. (I was using the simpler of the two binding definition 
interfaces.) When done, I hit the buttons for 'OK' (or however it is 
labelled -- I cannot currently check), but the definition dialog 
remained open. After several tries, I hit cancel, and IDLE terminated. 
(Whereas I expected the definition interface to close and return my to 
my unsaved :-( session.)

Afterwards, IDLE refused to launch. I tried various things, including 
reboot and eventually tried to run idle.pyw (the target of various 
shortcuts, etc.) by clicking on it. Nothing. Ran idle.py instead. The 
DOS-console this brings up displays:

Traceback (most recent call last):
   File "C:\Python24\Lib\idlelib\idle.py", line 21, in ?
     idlelib.PyShell.main()
   File "C:\PYTHON24\lib\idlelib\PyShell.py", line 1355, in main
     if not flist.open_shell():
   File "C:\PYTHON24\lib\idlelib\PyShell.py", line 275, in open_shell
     self.pyshell = PyShell(self)
   File "C:\PYTHON24\lib\idlelib\PyShell.py", line 793, in __init__
     OutputWindow.__init__(self, flist, None, None)
   File "C:\PYTHON24\lib\idlelib\OutputWindow.py", line 16, in __init__
     EditorWindow.__init__(self, *args)
   File "C:\PYTHON24\lib\idlelib\EditorWindow.py", line 108, in __init__
     self.apply_bindings()
   File "C:\PYTHON24\lib\idlelib\EditorWindow.py", line 774, in 
apply_bindings
     text.event_add(event, *keylist)
   File "C:\PYTHON24\lib\lib-tk\Tkinter.py", line 1299, in event_add
     self.tk.call(args)
_tkinter.TclError: bad event type or keysym "tab"
 >>>

I read through the various bits of code pointed at in the traceback. 
But, I'm a Python hobbyist, and have barely gone further than 'Hello 
World' with Tkinter. So, I don't know what to do with the information 
in the traceback.

I've looked at a number of 'IDLE won't start threads' that google 
knows about, but didn't see anything I recognized as useful. 
(Admittedly, I didn't read every single google hit :-)

Further, the last line of the traceback makes me think mine might be a 
somewhat unusual case. The keybinding I was defining when the 
excrement hit the air-conditioning was to make Shift + TAB perform a 
dedent on a region.

I did a search for files names *.p* (STAR.pSTAR for those whose 
mail-readers will take the wildcards as mark-up) modified today, 
hoping to track down the line defining the keybinding and remove it, 
but came up empty.

So, I'm at the end of what I can usefully do by way of diagnosis and 
repair.

Suggestions? (Anything gratefully received, but I favour being taught 
to fish over being fed merely for today.)

Thanks and best,

Brian vdB



From tom.willis at gmail.com  Wed Feb  9 17:11:52 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Wed, 9 Feb 2005 17:11:52 -0500
Subject: Python and version control
In-Reply-To: <1IvOd.537$Sx6.28@read3.inet.fi>
References: <XNrOd.1657$Mw3.72@amstwist00> <1IvOd.537$Sx6.28@read3.inet.fi>
Message-ID: <b54d04890502091411730d1ad@mail.gmail.com>

I'll throw in my reccomendation for svn as well. It just works.

On Wed, 09 Feb 2005 14:01:33 -0800 (PST), Timo Virkkala <a at a.invalid> wrote:
> Carl wrote:
> > What is the ultimate version control tool for Python if you are working in a
> > Windows environment?
> 
> I would very much recommend Subversion. It's in no way specific to either
> Windows or Python, but it's a wonderful tool. If you've ever used CVS, you'll
> feel right at home. Or after 10 minutes of learning the commands, that is.
> 
> And as someone already suggested, TortoiseSVN is a great front-end for SVN. It
> integrates with the Windows shell very nicely.
> 
> http://subversion.tigris.org/
> http://tortoisesvn.tigris.org/
> 
> --
> Timo Virkkala
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
Thomas G. Willis
http://paperbackmusic.net


From steve at holdenweb.com  Fri Feb  4 17:18:41 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 04 Feb 2005 17:18:41 -0500
Subject: string issue
In-Reply-To: <mailman.1923.1107553972.22381.python-list@python.org>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>	<36QMd.103084$Jk5.36127@lakeread01>
	<mailman.1923.1107553972.22381.python-list@python.org>
Message-ID: <lCSMd.103127$Jk5.64874@lakeread01>

Terry Reedy wrote:

> "Steve Holden" <steve at holdenweb.com> wrote in message 
> news:36QMd.103084$Jk5.36127 at lakeread01...
> 
[ ... ]
> 
> This seems much more sensible to me than building a new list with 
> everything (a copy), including things you don't want, and then deleting the 
> things you don't want (an O(n**2) operation).
> 
Which is presumably why the OP decided to go with the list 
comprehension. My main intention was to point out how the code in error 
could be fixed while retaining the same structure. You are of course 
correct in saying this is far from optimal in performance terms.

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From aleaxit at yahoo.com  Sat Feb  5 06:52:01 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 5 Feb 2005 12:52:01 +0100
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
Message-ID: <1grifns.14san6f1b076mdN%aleaxit@yahoo.com>

Alexander Zatvornitskiy
<Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org> wrote:

> Hi, Alex!
> 
> 31 jan 2005 at 13:46, Alex Martelli wrote:
> 
> (sorry for the delay,my mail client don't highlight me your answer)
> 
>  AM> Since the lack of declarations is such a crucial design choice for
>  AM> Python, then, given that you're convinced it's a very bad thing, I
>  AM> suggest you give up Python in favor of other languages that give you
>  AM> what you crave.
> Well, I like Python. But, as every language I know, it have some bad sides
> which I don't like. One of them in Python is lack of variable declarations,
> another (this problem is common with C/C++) is:
> ===
> >>>print 1/2
> 0
> ===
> (I understand why it is so, but I don't like it anyway. Such behaviour
> also can cause some hard-to-find-bugs)

You're conflating a fundamental, crucial language design choice, with a
rather accidental detail that's already acknowledged to be suboptimal
and is already being fixed (taking years to get fixed, of course,
because Python is always very careful to keep backwards compatibility).

Run Python with -Qnew to get the division behavior you probably want, or
-Qwarn to just get a warning for each use of integer division so those
hard to find bugs become trivially easy to find.  Or import from the
future, etc, etc.

The fact that in Python there are ONLY statements, NO declarations, is a
completely different LEVEL of issue -- a totally deliberate design
choice taken in full awareness of all of its implications.  I do not see
how you could be happy using Python if you think it went wrong in such
absolutely crucial design choices.


>  AM> issue for you.  Therefore, using Python, for you, would mean you'd be
>  AM> fighting the language and detesting its most fundamental design
>  AM> choice: and why should you do that?  There are zillions of languages
>  AM> -- use another one.
> Thank you for advice:)

You're welcome.

>  >> Pascal, or special syntax in C. It can cause very ugly errors,like
>  >> this: epsilon=0 S=0 while epsilon<10:  S=S+epsilon
>  >> epselon=epsilon+1 print S It will print zero, and it is not easy to
>  >> find such a bug!
>  AM> Actually, this while loop never terminates and never prints anything,
> Oh, I don't find it:)

Hit control-C (or control-Break or whatever other key combination
interrupts a program on your machine) when the program is just hanging
there forever doing nothing, and Python will offer a traceback showing
exactly where the program was stuck.

In any case, you assertion that "it will print zero" is false.  You
either made it without any checking, or chose to deliberately lie (in a
rather stupid way, because it's such an easy lie to recognize as such).


> Fine! Let interpreter never show us errors like division by zero, syntax
> errors, and so on. If file not found, library don't need to say it. Just skip
> it!!! Because every, even simple, test will find such bugs. Once you have unit
> tests, the added value of <anything> is tiny, and their cost remains.

Another false assertion, and a particularly ill-considered one in ALL
respects.  Presence and absence of files, for example, is an
environmental issue, notoriously hard to verify precisely with unit
tests.  Therefore, asserting that "every, even simple, test will find"
bugs connected with program behavior when a file is missing shows either
that you're totally ignorant about unit tests (and yet so arrogant to
not let your ignorance stop you from making false unqualified
assertions), or shamelessly lying.

Moreover, there IS no substantial cost connected with having the library
raise an exception as the way to point out that a file is missing, for
example.  It's a vastly superior approach to the old idea of "returning
error codes" and forcing the programmer to check for those at every
step.  If the alternative you propose is not to offer ANY indication of
whether a file is missing or present, then the cost of THAT alternative
would most obviously be grievous -- essentially making it impossible to
write correct programs, or forcing huge redundancy if the check for file
presence must always be performed before attempting I/O.

In brief: you're not just wrong, you're so totally, incredibly, utterly
and irredeemably wrong that it's not even funny.


> And, one more question: do you think code like this:
> 
> var S=0
> var eps
> 
> for eps in xrange(10):
>   S=S+ups
> 
> is very bad? Please explain your answer:)

Yes, the many wasted pixels in those idiotic 'var ' prefixes are a total
and utter waste of programmer time.  Mandated redundancy, the very
opposite of the spirit of Python.

> Uh! And you! And you!... And you must never even come close to any languages
> with variable declaration! Even to Visual Basic! :)

Wrong again.  I've made a good living for years as a C++ guru, I still
cover the role of C++ MVP for the Brainbench company, I'm (obviously)
totally fluent in C (otherwise I could hardly contribute to the
development of Python's C-coded infrastructure, now could I?), and as it
happens I have a decent command (a bit rusty for lack of recent use) of
dozens of other languages, including several Basic dialects and Visual
Basic in particular.

It should take you about 20 seconds with Google to find this out about
me, you know?  OK, 30 seconds if you're on a slow dialup modem line.

So, I guess you just *LIKE* being utterly and monumentally wrong, since
it would be so easy to avoid at least some of the bloopers you instead
prefer to keep making.

I *CHOOSE* Python, exactly because I have vast programming experience in
such a huge variety of languages, across all kinds of application areas,
methodologies, and sizes and levels of programming teams.  It's not
``perfect'', of course, being a human artifact, but it does implement
its main design ideas consistently and brilliantly, and gets the
inevitable compromises just about right.


Alex


From http  Wed Feb  2 03:23:49 2005
From: http (Paul Rubin)
Date: 02 Feb 2005 00:23:49 -0800
Subject: how to separate hexadecimal
References: <2cad209005020123107fb43105@mail.gmail.com>
	<2cad2090050201232427cb97f2@mail.gmail.com>
	<420082E4.7020605@iinet.net.au>
	<mailman.1738.1107332394.22381.python-list@python.org>
Message-ID: <7xhdkvbca2.fsf@ruckus.brouhaha.com>

jrlen balane <nbbalane at gmail.com> writes:
> would i be able to perform bitwise operation with the result?
> say, i want to get the two's complement of the result, is this correct:
> 
> twos_complement = (~ hex(hi + lo)) + 1

You can do bit operations, but hex(n) is the hex string for n, which
is not what you want.

If you want the hex form of the two's complement, just say

   hex(-(hi+lo) & 0xff)

assuming you want one byte, or

   hex(-(hi+lo) & 0xffff)

for two bytes.


From ncoghlan at iinet.net.au  Sat Feb 19 21:43:55 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 20 Feb 2005 12:43:55 +1000
Subject: multimethod (or rather overloading) in Python
In-Reply-To: <37k46qF5g7tt4U1@individual.net>
References: <37k236F5fdtu1U1@individual.net> <37k46qF5g7tt4U1@individual.net>
Message-ID: <4217F96B.5080800@iinet.net.au>

anton muhin wrote:
> anton muhin wrote:
> 
> Correction:
> 
>> Of course, I can imagine some metaclasses magic that would allow to code:
>>
>> class MyClass(WithOverloading):
>>   @overloadMethod(A)
>>   def someMetod(self, _): ...
>>
>> But it would rather convoluted: the best idea I have so far is to 
>> mangle  methods name in the manner most of C++ compilers do.

PEAK has a fairly sophisticated implementation of method dispatch you may want 
to look at.

http://peak.telecommunity.com/Articles/WhatisPEAK.html
http://dirtsimple.org/2004/11/generic-functions-have-landed.html
http://peak.telecommunity.com/doc/src/dispatch/__init__.html

I'm compelled to point out that PEAK should still be considered a 'work in 
progress', but PJE's ideas should help you out :)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From fredrik at pythonware.com  Tue Feb 15 04:26:42 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 15 Feb 2005 10:26:42 +0100
Subject: How to implement a file lock ??
References: <b322b4e605021501206c98e05@mail.gmail.com>
Message-ID: <cusf3u$shb$1@sea.gmane.org>

"ionel" <ionel.mc at gmail.com> wrote:

> is there a cross-platform library or module for file locking?
> or at least a win32 implementation.

for windows, see the third example on this page:

    http://www.effbot.org/librarybook/msvcrt.htm

for unix, see:

    http://www.effbot.org/librarybook/fcntl.htm

</F> 





From luismgz at gmail.com  Wed Feb  2 09:04:11 2005
From: luismgz at gmail.com (Luis M. Gonzalez)
Date: 2 Feb 2005 06:04:11 -0800
Subject: The next Xah-lee post contest
In-Reply-To: <1107306365.509084.47890@z14g2000cwz.googlegroups.com>
References: <mailman.1568.1107005758.22381.python-list@python.org>
	<ctg6qn$q63$1@solaris.cc.vt.edu>
	<mailman.1572.1107009638.22381.python-list@python.org>
	<e9lpv0tk63k0v7v1lctt0d77f92ub48bl3@4ax.com>
	<20050130114008.797088857.whereU@now.com>
	<mailman.1602.1107115028.22381.python-list@python.org>
	<1107137465.973491.42050@f14g2000cwb.googlegroups.com>
	<fMpLd.101045$Jk5.4448@lakeread01>
	<sqasv0petsjfr0qb9u7e1i30n8mrjl3t78@4ax.com>
	<Q7ednbtYIue5LWLcRVn-2Q@powergate.ca>
	<1107277633.959477.302860@f14g2000cwb.googlegroups.com>
	<1107306365.509084.47890@z14g2000cwz.googlegroups.com>
Message-ID: <1107353051.528078.186240@o13g2000cwo.googlegroups.com>


alex23 wrote:
> Luis M. Gonzalez wrote:
> > I kind of like this guy... it's like he has a few bugs in his
brain,
> > but other parts are surprisingly interesting.
>
> Which bits especially impress you, the rampant misogyny or the
> unwarranted intellectual arrogance?


I didn't say that I'm "impressed". I just said that some things he says
are somewhat interesting, funny and weird.
I think he, as character, is a little bit excentric and far from
nornal, but he is absolutely harmless.
And to tell you the truth, I don't understand the animosity and
aggressiveness demonstrated against him.
Those who are offended by his posts, should just go ahead and read
someone else's posts intead of starting World War III.



From ncoghlan at iinet.net.au  Mon Feb 14 05:34:58 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Mon, 14 Feb 2005 20:34:58 +1000
Subject: For American numbers
In-Reply-To: <cups3k$kbs$2@gemini.csx.cam.ac.uk>
References: <420e7376$1@nntp0.pdx.net>	<gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>	<420fb4e6$0$16575$9b622d9e@news.freenet.de>	<ZcKdnWy9_fFamI3fRVn-iA@powergate.ca>	<mailman.2509.1108352149.22381.python-list@python.org>	<37b8dfF5anl9bU1@individual.net>
	<cups3k$kbs$2@gemini.csx.cam.ac.uk>
Message-ID: <42107ED2.4090909@iinet.net.au>

Michael Hoffman wrote:
> Peter Maas wrote:
> 
>> This kibi-mebi thing will probably fail because very few can manage
>> to say "kibibyte" with a straight face :)
> 
> 
> I agree, I can't do it yet. I can write kiB and MiB though with a
> straight face, and find that useful.

And written communication is where avoiding the ambiguity tends to matter more - 
in a conversation, if the difference actually matter, you can just ask. With a 
written document, requesting clarification often isn't so simple.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From gashton at cmedltd.com  Wed Feb 23 09:42:32 2005
From: gashton at cmedltd.com (Graham)
Date: 23 Feb 2005 06:42:32 -0800
Subject: Selective HTML doc generation
Message-ID: <1109169752.819253.202930@o13g2000cwo.googlegroups.com>

Hi. I'm looking for a documentation generation tool (such as pydoc,
epydoc, happydoc, etc.) that will allow me to filter what it includes
in
it's output.

I only want the reader to know about classes and methods in my package
if if the classes have docstrings. I've got a large package that is
used
by relatively non-technical users (and yet they write Python!) that
documents the public API with docstrings. I don't want to clutter their
view of the world with links to the package's internal classes and
documentation that covers things like __special__ methods.

Anybody know of anything that let's you do it? I realise I may end up
doing some hacking here but don't want to repeat work unnecessarily.

Cheers,

Graham



From tjreedy at udel.edu  Tue Feb 15 19:25:30 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 15 Feb 2005 19:25:30 -0500
Subject: Iterator / Iteratable confusion
References: <420a5c1e$0$21630$a1866201@visi.com><slrnd0q67t.52v.curty@einstein.electron.net><200502131848.03655.francis.girard@free.fr>	<200502131958.27410.francis.girard@free.fr><cuolu7$qv7$1@sea.gmane.org>	<cuooip$1pd$1@sea.gmane.org><curt3v$lmf$1@sea.gmane.org>
	<cuthdk$dnq$1@sea.gmane.org>
Message-ID: <cuu3p0$55n$1@sea.gmane.org>


"Michael Spencer" <mahs at telcopartners.com> wrote in message 
news:cuthdk$dnq$1 at sea.gmane.org...

> Terry, thanks for responding in depth.

We are both interested in the murky edges at and beyond conventional usage.

> Terry wrote
>> 2. "It is not essential to not do something wasteful as long as it is >> 
>> otherwise inconsequential."

> Not that "iter(iterator) is iterator" is somehow wasteful (actually it > 
> seems  conservative), but rather that alternative behavior is readily 
> implmented.

What I was pointing to as wasteful is the application of your alternative 
behavior where an object is replaced by a copy and then effectively tossed.

> However, I suggest that there may be cases where
> "iter(iterator) is not iterator" is useful behavior.

I am quite aware that multiple iterators for the same iterable (actual or 
conceptual) can be useful (cross products, for example).  But I am dubious 
that initialized clones of 'iterators' are *more* useful, especially for 
Python, than multiple iterators derived from repeated calling of the 
callable that produced the first iterator.  It might be different if Python 
were a prototype/clone language rather than a typeclass/instance language. 
It is also possible that we have slightly different ideas of 'useful' in 
the Python context.

In your example, as I pointed out, A.__iter__ and AnIterator.__iter__ have 
the same code, so I could not see any advantage to getting a copy through 
calling the latter instead of the former.  For the disadvantage, see below.

>  What to call such an object is another matter.

spencerator ;-?

Here are some related reasons why I think it useful if not essential to 
restrict the notion of iterator by restricting  iterator.__iter__ to 
returning self unmodified.

Leaving Python aside, one can think of iterable as something that 
represents a collection and that can produce an iterator that produces the 
items of the collection one at a time.  In this general conceptioning, 
iterables and iterators seem distinct (if one ignores self-iterables).  In 
Python, giving iterators an __iter__ method, while quite useful, erases 
(confuses) the (seeming) distinction, but giving them a minimal __iter__ 
does so minimally, keeping iterators a distinct subcategory of iterable. 
Spencerators confuse the distinction more than minimally and define a 
vaguer subcategory.

Essential?  For something defined as minimal, it is essential that it be 
minimal.  But you point seems to be that it is not essential that iterator 
be so defined.  Ok.

(Aside: an iterator can be thought of as representing the sequence of 
future .next() returns.  From this viewpoint, making iterators a 
subcategory of iterable is more than just a convenience.)

Taking Python as it is, a useful subcategory of iterable is 'reiterable'. 
This is distinct from iterator strictly defined.  This we have iterables 
divided into iterators, reiterables, and other.  I think this is 
didactically useful.  Spencerators are reiterables.

Iter(iterator) returning iterator unchanged makes iterator a fixed point of 
iter.  It ends any chain of objects returned by repeated iter calls. 
Spencerators prolong any iter chain, making it infinite instead of finite. 
Essential?  Repeat the paragraph above with 'a fixed point' substituted for 
'minimal'.

Terry J. Reedy





From stephen at theboulets.net  Fri Feb 18 13:36:12 2005
From: stephen at theboulets.net (stephen at theboulets.net)
Date: 18 Feb 2005 10:36:12 -0800
Subject: "Best" way to SIGHUP spamd from web page?
In-Reply-To: <mailman.2749.1108630051.22381.python-list@python.org>
References: <mailman.2749.1108630051.22381.python-list@python.org>
Message-ID: <1108751771.973669.69530@g14g2000cwa.googlegroups.com>

Webmin (webmin.com) has a command shell module (cgi over https?). Isn't
this an example of a secure way to run commands via the internet?

Stephen



From alanmk at hotmail.com  Thu Feb 10 12:32:51 2005
From: alanmk at hotmail.com (Alan Kennedy)
Date: Thu, 10 Feb 2005 17:32:51 +0000
Subject: is there a safe marshaler?
In-Reply-To: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
Message-ID: <9RMOd.47295$Z14.32810@news.indigo.ie>

[Irmen de Jong]
> Pickle and marshal are not safe. They can do harmful
> things if fed maliciously constructed data.
> That is a pity, because marshal is fast.
> I need a fast and safe (secure) marshaler.

Hi Irmen,

I'm not necessarily proposing a solution to your problem, but am 
interested in your requirement. Is this for pyro?

In the light of pyro, would something JSON be suitable for your need? I 
only came across it a week ago (when someone else posted about it here 
on c.l.py), and am intrigued by it.

http://json.org

What I find particularly intriguing is the JSON-RPC protocol, which 
looks like a nice lightweight alternative to XML-RPC.

http://oss.metaparadigm.com/jsonrpc/

Also interesting is the browser embeddable JSON-RPC client written in 
javascript, for which you can see a demo here

http://oss.metaparadigm.com/jsonrpc/demos.html

I thought you might be interested.

regards,

-- 
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan


From john at grulic.org.ar  Thu Feb 17 13:32:56 2005
From: john at grulic.org.ar (John Lenton)
Date: Thu, 17 Feb 2005 15:32:56 -0300
Subject: namespace collisions
In-Reply-To: <4214e074$0$32617$db0fefd9@news.zen.co.uk>
References: <4214e074$0$32617$db0fefd9@news.zen.co.uk>
Message-ID: <20050217183256.GD2366@grulic.org.ar>

On Thu, Feb 17, 2005 at 06:20:36PM +0000, Will McGugan wrote:
> Hi,
> 
> I'm accumulating a number of small functions, which I have sensibly put 
> in a single file called 'util.py'. But it occurs to me that with such a 
> generic name it could cause problems with other modules not written by 
> myself. Whats the best way of handling this? If I put it in a common 
> location in my Python path, should I call it willsutil.py?

   local.util

is probably a convention worth starting :)

or you could go with

   WilMcGugan.util

but ThatGetsOldFast.


-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
All my friends are getting married,
Yes, they're all growing old,
They're all staying home on the weekend,
They're all doing what they're told.
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From devries at idolstarastronomer.com  Thu Feb 24 11:22:22 2005
From: devries at idolstarastronomer.com (Christopher De Vries)
Date: Thu, 24 Feb 2005 11:22:22 -0500
Subject: Python Modules for Various Internet Protocols?
In-Reply-To: <PLidnd5RcOYwYYDfRVn-3w@adelphia.com>
References: <PLidnd5RcOYwYYDfRVn-3w@adelphia.com>
Message-ID: <20050224162221.GA13386@miyu.cjas.org>

On Thu, Feb 24, 2005 at 11:11:07AM -0600, Efrat Regev wrote:
>     I was wondering whether there are any Python modules for various
> Internet protocols, ...

Twisted (http://twistedmatrix.com/products/twisted) is an event driven
framework for writing network applications. It includes many internet protocols
including ftp, irc, imap4, pop, etc... 

Chris


From jeff at ccvcorp.com  Wed Feb 16 20:38:15 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Wed, 16 Feb 2005 17:38:15 -0800
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <roy-4DE9E8.19264616022005@reader2.panix.com>
References: <37hippF4gcimiU1@individual.net>
	<eppstein-211DEC.14245416022005@news.service.uci.edu>
	<roy-4DE9E8.19264616022005@reader2.panix.com>
Message-ID: <1117ta241n6k4a9@corp.supernews.com>

Roy Smith wrote:

>>>What I can't find an explanation for is why str.join() doesn't
>>>automatically call str() on its arguments, so that e.g.
>>>str.join([1,2,4,5]) would yield "1245", and ditto for e.g.
>>>user-defined classes that have a __str__() defined.
>>
>>That would be the wrong thing to do when the arguments are unicodes.
> 
> Why would it be wrong?  I ask this with honest naivete, being quite 
> ignorant of unicode issues.

As someone else demonstrated earlier...

 >>> str(u'?')
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
UnicodeError: ASCII encoding error: ordinal not in range(128)
 >>>

Using str() on a unicode object works... IF all of the unicode 
characters are also in the ASCII charset.  But if you're using 
non-ASCII unicode characters (and there's no point to using Unicode 
unless you are, or might be), then str() will throw an exception.

The Effbot mentioned a join() implementation that would be smart 
enough to do the right thing in this case, but it's not as simple as 
just implicitly calling str().

Jeff Shannon
Technician/Programmer
Credit International



From dwelch91 at comcast.net  Wed Feb 23 23:41:35 2005
From: dwelch91 at comcast.net (djw)
Date: Wed, 23 Feb 2005 20:41:35 -0800
Subject: Like overloading __init__(), but how?
In-Reply-To: <pan.2005.02.24.03.20.40.119047@yahooz.com>
References: <pan.2005.02.24.03.20.40.119047@yahooz.com>
Message-ID: <W8ydnQRGO63pxoDfRVn-pQ@comcast.com>

This was discussed only days ago:

http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/41a6c0e1e260cd72/fc1c924746532316?q=multiple+constructors+python&_done=%2Fgroups%3Fq%3Dmultiple+constructors+python%26&_doneTitle=Back+to+Search&&d#fc1c924746532316

-Don


John M. Gabriele wrote:
> I know that Python doesn't do method overloading like
> C++ and Java do, but how am I supposed to do something
> like this:
> 
> --------------------- incorrect ------------------------
> #!/usr/bin/python
> 
> class Point3d:
>       pass
> 
> class Vector3d:
>       """A vector in three-dimensional cartesian space."""
> 
>       def __init__( self ):
>             """Create a Vector3d with some reasonable default value."""
>             x, y, z = 0.0, 0.0, 0.0
> 
> 
>       def __init__( self, x_from, y_from, z_from,
>                           x_to,   y_to,   z_to ):
>             """Create a Vector3d from x-y-z coords."""
>             # ...
>             pass
> 
> 
>       def __init__( self, point_from, point_to ):
>             """Create a Vector3d from two Point3d objects."""
>             # ...
>             pass
>       
> 
>       def __init__( self, same_as_this_vec ):
>             """Create a Vector3d from a copy of another one."""
>             # ...
>             pass
> 
> p = Point3d()
> p2 = Point3d()
> # v = Vector3d( p2, p ) -- Nope. Only the last __init__() counts.
>  
> ---------------------- /incorrect -------------------------------
> 
> Thanks.
> 


From has.temp2 at virgin.net  Wed Feb 16 13:17:30 2005
From: has.temp2 at virgin.net (has)
Date: 16 Feb 2005 10:17:30 -0800
Subject: [ann] Appscript Installer 1.0
Message-ID: <1108577850.257518.231250@z14g2000cwz.googlegroups.com>

Hi all,

Announcing the first release of the all-in-one Appscript Installer
package for Mac OS X 10.3.

Appscript brings AppleScript-quality application scripting support to
MacPython on Mac OS X. This package installs everything you need to
control "Applescriptable" applications using the Python 2.3 runtime
included as standard in Mac OS X 10.3.

In addition to a clean, easy-to-use, object oriented-like syntax for
scripting applications, appscript also includes powerful built-in help
facilities for exploring applications' terminology and object model -
features normally found only in high-end commercial AppleScript
editors.

To download Appscript Installer, please visit the appscript webpage:

http://freespace.virgin.net/hamish.sanderson/appscript.html

To see some examples of use:

http://freespace.virgin.net/hamish.sanderson/appscript_examples/index.html

If you have any questions or comments, please don't hesitate to get in
touch. We're still working to polish appscript and finish its
documentation, so all feedback is greatly appreciated.

Enjoy!

has



From csgcsg39 at hotmail.com  Fri Feb  4 04:23:54 2005
From: csgcsg39 at hotmail.com (C Gillespie)
Date: Fri, 4 Feb 2005 09:23:54 -0000
Subject: Calling a method using an argument
References: <ctth3v$o2r$1@ucsnew1.ncl.ac.uk>
Message-ID: <ctvevd$gua$1@ucsnew1.ncl.ac.uk>

Dear All,

Many thanks

Colin
"C Gillespie" <csgcsg39 at hotmail.com> wrote in message
news:ctth3v$o2r$1 at ucsnew1.ncl.ac.uk...
> Dear All,
>
> I have a simple class
> class hello:
>     def world(self):
>         return 'hello'
>     def test(self,arg):
>         return self.arg
>
> When I want to do is:
> >hello.test('world')
> 'hello'
>
> i.e. pass the method name as an argument. How should I do this?
>
> Thanks
>
> Colin
>
>




From godoy at ieee.org  Fri Feb 11 13:36:18 2005
From: godoy at ieee.org (Jorge Luiz Godoy Filho)
Date: Fri, 11 Feb 2005 16:36:18 -0200
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<4207c8db$0$21623$a1866201@visi.com>
	<cub12p$pke$1@achot.icm.edu.pl>
	<36sip2F56jjmaU1@individual.net> <umzubw8xg.fsf@vh-s.de>
	<420cb65f$0$238$edfadb0f@dread12.news.tele.dk>
Message-ID: <18174288.akFrdXrZLZ@jupiter.g2ctech>

Max M wrote:

> GPL is not suitable for all kinds of software. It's nice if you are
> sharing code with others, but if you are developing something like a
> desktop application that you want to sell for money, using the GPL is a
> bad idea.

If you're earning money, why not pay for the libraries that allowed you to
do so?


Be seeing you,
Godoy.


From cwmoad at gmail.com  Tue Feb  8 15:58:59 2005
From: cwmoad at gmail.com (cwmoad at gmail.com)
Date: 8 Feb 2005 12:58:59 -0800
Subject: graph visualisation
In-Reply-To: <MSGID_2=3A5025=2F3.131_420910b1@fidonet.org>
References: <MSGID_2=3A5025=2F3.131_420910b1@fidonet.org>
Message-ID: <1107896339.572933.113380@f14g2000cwb.googlegroups.com>


Alexander Zatvornitskiy wrote:
> Hello, All!
>
> I need routines for visualization of graphs, like this for Matlab:
> ===
> You can visualize an arbitrary graph (such as one learned using the
structure
> learning routines) with Matlab code contributed by Ali Taylan Cemgil
from the
> University of Nijmegen. For static BNs, call it as follows:
>
> draw_graph(bnet.dag);
> ===
>
> Are there any packages with such ability? Also I need in drawing
plots of
> functions.
> 
> Alexander, zatv at bk.ru



From danperl at rogers.com  Mon Feb  7 00:27:28 2005
From: danperl at rogers.com (Dan Perl)
Date: Mon, 7 Feb 2005 00:27:28 -0500
Subject: CGI POST problem was: How to read POSTed data
References: <mailman.1980.1107622913.22381.python-list@python.org>
	<dMydnSAsTcgE2JjfRVn-oQ@rogers.com>
	<1107659974.048175.221770@z14g2000cwz.googlegroups.com>
Message-ID: <m6ednTUprqnfYZvfRVn-uA@rogers.com>


<and-google at doxdesk.com> wrote in message 
news:1107659974.048175.221770 at z14g2000cwz.googlegroups.com...
> CGIHTTPServer, on the other hand, I have never really trusted. I would
> suspect that fella.

CGIHTTPServer wasn't the culprit after all, it was os.py.  See bug report 
"[ 1100235 ] Scripts started with CGIHTTPServer: missing cgi environment" 
which is actually caused by "[ 1110478 ] os.environ.update doesn't work". 
They are fixed with a patch in 1110478.  I applied the patch in os.py and my 
web app is working now. 




From fredrik at pythonware.com  Thu Feb  3 13:49:11 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 3 Feb 2005 19:49:11 +0100
Subject: About standard library improvement
References: <WorldClient-F200502031432.AA32333857@tesla.cujae.edu.cu>
Message-ID: <cttrlf$4ev$1@sea.gmane.org>

Frank Abel Cancio Bello wrote:

> If I make some improvement to xmlrpclib module, where I should send this
> improvement to form part of next standard library release?

http://sourceforge.net/tracker/?group_id=5470&atid=305470

</F> 





From jjl at pobox.com  Sat Feb  5 17:37:40 2005
From: jjl at pobox.com (John J. Lee)
Date: 05 Feb 2005 22:37:40 +0000
Subject: Insane import behaviour and regrtest.py: heeelp
Message-ID: <87sm4aws3v.fsf@pobox.com>

I'm tearing my hair out at what seems like weird import behaviour I'm
getting from Python's stdlib test script, regrtest.py (not for the
first time: seem to have forgotten the resolution from last time, and
the time before, and the time before that, when this damn test script
of Python's had me screaming at the screen... I don't seem to be
learning my lesson here :( )

*Please* somebody inform me *what* affects what file Python will pick
up, other than:

0. Python executable

1. sys.path

2. current working directory

3. Directory in which script lives
 
4. Directory from which script was invoked

5. The contents of one's hard drive

Even with all of these constant (and not all of them should directly
affect the outcome in any case, I know), I get different modules
picked up from imports in two scripts, and I'm damned if I can see
why.

Here's the first script, just a test script:

import os, sys
sys.path = ['/hda/usr/local/buf/python/python/dist/src/Lib', '/home/john/lib/python', '/usr/local/lib/python24.zip', '/usr/local/lib/python2.4', '/usr/local/lib/python2.4/plat-linux2', '/usr/local/lib/python2.4/lib-tk', '/usr/local/lib/python2.4/lib-dynload', '/usr/local/lib/python2.4/site-packages']
abstest = "test.test_urllib2"
print 'abstest', abstest
print 'sys.path', sys.path
print 'cwd', os.getcwd()
the_package = __import__(abstest, globals(), locals(), [])
print 'the_package.__path__', the_package.__path__

If I stick that script in my Python CVS Lib/test directory as blah.py,
then cd to Lib and:

$ python2.4 test/blah.py
abstest test.test_urllib2
sys.path ['/hda/usr/local/buf/python/python/dist/src/Lib', '/home/john/lib/python', '/usr/local/lib/python24.zip', '/usr/local/lib/python2.4', '/usr/local/lib/python2.4/plat-linux2', '/usr/local/lib/python2.4/lib-tk', '/usr/local/lib/python2.4/lib-dynload', '/usr/local/lib/python2.4/site-packages']
cwd /hda/usr/local/buf/python/python/dist/src/Lib
*************
the_package.__path__ ['/hda/usr/local/buf/python/python/dist/src/Lib/test']


All as expected: I pick up Lib/test/test_urllib2.py -- that *******
business is coming from a print >> sys.stderr statement I inserted at
module level in that copy of the module (though the >> sys.stderr is
probably unnecessary, since IIRC regrtest does not rebind sys.stdout
when the -v option is given, as in my usage below).


But, when I run the second script, Lib/test/regrtest.py, with a
modified sys.path (see paragraph below) and the same print statements
as in my test script inserted:

$ python2.4 test/regrtest.py -f test/torun -v
test_urllib2
abstest test.test_urllib2
sys.path ['/hda/usr/local/buf/python/python/dist/src/Lib', '/home/john/lib/python', '/usr/local/lib/python24.zip', '/usr/local/lib/python2.4', '/usr/local/lib/python2.4/plat-linux2', '/usr/local/lib/python2.4/lib-tk', '/usr/local/lib/python2.4/lib-dynload', '/usr/local/lib/python2.4/site-packages']
cwd /hda/usr/local/buf/python/python/dist/src/Lib
the_package.__path__ ['/usr/local/lib/python2.4/test']

I get the test_urllib2.py from /usr/local/lib/python2.4 (note __path__
and lack of *****s), though everything else (sys.path, cwd, etc.)
remains the same as my test script above!

The only change I made to regrtest other than the print statements was
to add Lib to sys.path, so I pick up modules from CVS instead of the
installed 2.4 versions (yeah, I know I should build and install a
python2.5 executable from CVS, but I don't see how that's relevant here).

Why???  Help!

stupid-stupid-stupid-gnnnnhhhhh-<wink>-ly y'rs,


John


From francis.girard at free.fr  Wed Feb  2 04:17:34 2005
From: francis.girard at free.fr (Francis Girard)
Date: Wed, 2 Feb 2005 10:17:34 +0100
Subject: Next step after pychecker
In-Reply-To: <420010a0$0$27056$626a14ce@news.free.fr>
References: <41ff0308$0$6503$636a15ce@news.free.fr>
	<mailman.1708.1107288807.22381.python-list@python.org>
	<420010a0$0$27056$626a14ce@news.free.fr>
Message-ID: <200502021017.36294.francis.girard@free.fr>

Le mercredi 2 F?vrier 2005 00:28, Philippe Fremy a ?crit?:
> I really hope that pypy will provide that kind of choice. Give me python
> with eiffel like contracts, super speed optimisation thank to type
> inference and I will be super happy.

That's also my dream. Type inference not so much for speed but for safety. 
There are type fans (like most skilled C++ programmer), anti-type supporters 
(like the talented Alex Martelli). Type inference sits in the middle.

Didn't understand how pypy intend to support type inference. I read something 
about automatically translating Python into the "smooth blend" Pyrex. I am 
not sure what it exactly means and how they plan to face the problems we 
foresee.

Francis Girard



From dbickett at gmail.com  Wed Feb  2 21:40:05 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Wed, 2 Feb 2005 21:40:05 -0500
Subject: CONTEST - What is the (best) solution?
In-Reply-To: <1107395104.361373.206140@o13g2000cwo.googlegroups.com>
References: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
	<1107350983.411793.146600@g14g2000cwa.googlegroups.com>
	<1107357151.234804.187440@g14g2000cwa.googlegroups.com>
	<1107395104.361373.206140@o13g2000cwo.googlegroups.com>
Message-ID: <1d6cdae3050202184071c2f8cd@mail.gmail.com>

Cappy2112 wrote:
> > dictionaries can NOT contain dictionaries.
> 
> Who told you this?
> In my python, they can.
> [snip]

You took his reply out of context. Fuzzyman asked him if *his*
dictionaries were to contain dictionaries, and the reply was no, they
will not.

-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From ncoghlan at iinet.net.au  Sat Feb 26 00:05:59 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 26 Feb 2005 15:05:59 +1000
Subject: Trees
In-Reply-To: <388mj5F5k1pveU1@individual.net>
References: <mailman.3035.1109311254.22381.python-list@python.org>
	<388mj5F5k1pveU1@individual.net>
Message-ID: <422003B7.8080107@iinet.net.au>

Diez B. Roggisch wrote:
> Or writing a Node-class is also so straightforward that few care about them
> being part of the core:

Writing a *simple* node class is easy, but a full-featured one that supports 
things like comparison and easy iteration is a bit more work. So various people 
write partial implementations with only the features they need, and they all end 
up being incompatible. So beyond being able to use it, the other thing is that 
having an implementation in the standard library acts as a de facto interface 
standard, making it easier to write common code to operate on tree structures.

All it would take to make it happen is a PEP, an implementation and a champion 
with some persuasive ability :)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From MLists at romulo.de  Sun Feb 27 09:11:42 2005
From: MLists at romulo.de (Rainer Mansfeld)
Date: Sun, 27 Feb 2005 15:11:42 +0100
Subject: class factory example needed (long)
In-Reply-To: <s_ZTd.176596$K7.77632@news-server.bigpond.net.au>
References: <s_ZTd.176596$K7.77632@news-server.bigpond.net.au>
Message-ID: <4221D51E.20601@romulo.de>

Gary Ruben wrote:
> I have a class factory problem. You could say that my main problem is
> that I don't understand class factories.
> My specific problem:
> I have a class with several methods I've defined.
> To this class I want to add a number of other class methods where the
> method names are taken from a list.
> For each list member, I want to build a method having the list member
> name so that I can override another method of the same name for objects
> which are instances of this class. Finally, I want my class factory
> which creates the method to call the overridden method.
> 
> I'm sure my description is confusing, so I'll try to illustrate it.
> 
> 
> import Numeric
> # The Numeric module contains a whole lot of methods which operate on
> certain number types
> 
> class foo:
> """ this is a number type class
> """
>     def __init__(self, value):
>         self.value = float(value)
>     def __str__(self):
>         .
>         . other methods here
>         .
> 
>     import string
>     ufuncs = string.split("""
>         sqrt arccos arccosh arcsin arcsinh arctan arctanh cos cosh tan tanh
>         log10 sin sinh sqrt absolute fabs floor ceil fmod exp log conjugate
>         """)    # these are the methods from Numeric that I want to
> override/wrap for my number type
> 
>     for u in ufuncs:
>         I need something here which builds methods called sqrt(),
> arccos(), etc.
> 
>     An illustrative example of the class methods I want to build with
> some sort of class factory is
>     def sqrt(self):
>         val = Numeric.sqrt(self.value)
>         return foo(Numeric.sqrt(self.value) + 42)
> 
>     def arccos(self):
>         val = Numeric.arccos(self.value)
>         return foo(Numeric.arccos(self.value) + 42)
> 
> 
> if __name__ == "__main__":
>     a = 9
>     b = foo(7)
>     print Numeric.sqrt(a)
>     print Numeric.sqrt(b)
> 
> 
> This would print
> 3
> 7
> 
> Note that the methods I want to create under program control are all
> identical in form. In this example they all call the wrapped method with
> an argument 42 greater than the value of the number.
> Does anyone have an example where they've done something similar or
> could help me out with an example?
> thanks in anticipation,
> Gary

Hi Gary,

you want your 'class factory' to change the methods of Numeric, so 
that they accept foo objects and return foo objects?
I've not the slightest idea how to achieve that.

If OTOH you want your foo class to have sqrt, arccos, etc. methods 
without defining them explicitly, I think you're looking for 
something like:

. import Numeric
.
. class Foo(object):
.     def __init__(self, value):
.         self.value = float(value)
.         for u in ['sqrt', 'cos', 'tan']:
.             setattr(self, u, lambda uf=getattr(Numeric, u):
.                                  uf(self.value + 42.0))

 >>> f = Foo(7)
 >>> f.sqrt()
7.0

HTH
   Rainer



From kent37 at tds.net  Wed Feb 23 07:41:16 2005
From: kent37 at tds.net (Kent Johnson)
Date: Wed, 23 Feb 2005 07:41:16 -0500
Subject: Style guide for subclassing built-in types?
In-Reply-To: <1109151417.903188.73790@f14g2000cwb.googlegroups.com>
References: <ba1e306f.0502221846.70cb4d5c@posting.google.com>
	<1109127834.660822.247120@g14g2000cwa.googlegroups.com>
	<1109150091.356411.150460@l41g2000cwc.googlegroups.com>
	<1109151417.903188.73790@f14g2000cwb.googlegroups.com>
Message-ID: <421c76cd$1_1@newspeer2.tds.net>

janeaustine50 at hotmail.com wrote:
> p.s. the reason I'm not sticking to reversed or even reverse : suppose
> the size of the list is huge.

reversed() returns an iterator so list size shouldn't be an issue.

What problem are you actually trying to solve?

Kent

> 


From tom.willis at gmail.com  Fri Feb 18 11:57:39 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Fri, 18 Feb 2005 11:57:39 -0500
Subject: WebServices/SOAP/Zolera Arghhhhhhhhh!!!!!!...not so much
Message-ID: <b54d0489050218085726b4fc0e@mail.gmail.com>

I am not a SOAP/Web Services expert!!!!!!

But I had to interface with some webservice code here at work. I was
reading on the net the complextypes didn't work or were finnicky
etc....

Well I managed to get it to work on Zolera 1.7. First the code
generated from the wsdl didn't work without some editing due to types
being declared later in the file but referenced earlier, and being in
different namespaces.

The next hurdle was getting the request to serialize properly. My
request consisted of some strings and a complextype which was nothing
but strings accept for a date.

The date serialization was throwing an error. There was an article on
ibm dev works where they claimed to not be able to get it to work. So
I tried some things

def parsedatestring(datestr):
    #SQLServer Date Format delimited by space 1st part date (/) 2nd
part time (:)
    dt = datestr.strip("'").split(" ")
    month,day,year = dt[0].split("/")
    hour,minute,second = dt[1].split(":")

    #this one works
    return datetime(int(year),int(month),int(day),int(hour),int(minute),int(second)).utctimetuple()

    #throws "Exception Serializing demo
xmlns="http://DefaultNamespace"._birthDate, TypeError int argument
required"
    #return "%s-%s-%s" % (year,month,day)
    
    #throws error " Exception Serializing demo
xmlns="http://DefaultNamespace"._birthDate, TypeError int argument
required"
    #return "%s-%s-%sT%s:%s:%s" % (year,month,day,hour,minute,second)
    
    #throws "Exception Serializing demo
xmlns="http://DefaultNamespace"._birthDate, TypeError not all
arguments converted during string formatting"
    #return tuple((int(year),int(month),int(day),int(hour),int(minute),int(second)))

    #throws "Exception Serializing demo
xmlns="http://DefaultNamespace"._birthDate, TypeError not all
arguments converted during string formatting"
    #return tuple((year,month,day,hour,minute,second))

    #throws "Exception Serializing demo
xmlns="http://DefaultNamespace"._birthDate, TypeError not all
arguments converted during string formatting"
    #return tuple((float(year),float(month),float(day),float(hour),float(minute),float(second)))

    #throws "Exception Serializing demo
xmlns="http://DefaultNamespace"._birthDate, TypeError iteration over
non-sequence"
    #return datetime(int(year),int(month),int(day),int(hour),int(minute),int(second))


Call me stupid, but I could not find out anywhere in the ZLI docs, the
web, code or anything that specified I pass a utctimetuple. As a
client of the API, I would assume it would be converted for me if I
pass a python object.


Anyway, I'm not bitching so much about the api as I am making an
effort to get this out there on the web just in case someone else is
hitting a brick wall on webservice interaction with python.

I'm not convinced that Simple Object Access Protocol is actually
simple. I guess if you compare to raw sockets yeah. Easier than COM+ ?
Hardly.

-- 
Thomas G. Willis
http://paperbackmusic.net


From pipedreamergrey at gmail.com  Sat Feb 26 11:19:17 2005
From: pipedreamergrey at gmail.com (PipedreamerGrey)
Date: 26 Feb 2005 08:19:17 -0800
Subject: PythonCard and Py2Exe
In-Reply-To: <DvVSd.6435$OU1.4090@newssvr21.news.prodigy.com>
References: <1109108628.859879.121020@g14g2000cwa.googlegroups.com>
	<DvVSd.6435$OU1.4090@newssvr21.news.prodigy.com>
Message-ID: <1109434757.740226.119380@o13g2000cwo.googlegroups.com>

That did it.  Thanks a lot.



From http  Wed Feb 16 10:03:01 2005
From: http (Paul Rubin)
Date: 16 Feb 2005 07:03:01 -0800
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<37h194F50j4pkU1@individual.net>
	<7xfyzwehq7.fsf@ruckus.brouhaha.com>
	<37h2keF5a2ijjU1@individual.net>
	<7xwtt8a7vu.fsf@ruckus.brouhaha.com>
	<37h5d6F5ck38lU1@individual.net>
Message-ID: <7xu0oc4key.fsf@ruckus.brouhaha.com>

"Diez B. Roggisch" <deetsNOSPAM at web.de> writes:
> It has to be installed. And it has C-modules - but I don't see that
> as a problem. Of course this is my personal opinion - but it's
> certainly easier installed than to cough up your own transaction
> isolated persistence layer.  I started using it over pickle when my
> multi-threaded app caused pickle to crash.

I don't feel that I need ACID since, as mentioned, I'm willing to lock
the entire database for the duration of each transaction.  I just want
a simple way to handle locking, retries, and making sure the locks are
cleaned up.

> ZODB does not have a server-process, and no external setup beyond the
> installation of the module itself.

That helps, thanks.

> Even if you consider installing it as too heavy for your current needs, you
> should skim over the tutorial to get a grasp of how it works. 

Yes, I've been wanting to look at it sometime.


From harlinseritt at yahoo.com  Wed Feb  9 00:56:18 2005
From: harlinseritt at yahoo.com (Harlin)
Date: 8 Feb 2005 21:56:18 -0800
Subject: Python versus Perl ?
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
Message-ID: <1107928578.489584.282950@z14g2000cwz.googlegroups.com>

If you give it a good go, you will be amazed at how the text processing
is so much better than Perl's. The same with the object orientation
(what oop in Perl?? none... at least none worth mentioning :-) It's
been said before by many Python users... Python allows newbies to
program and wizards to be even more wizardly... or something to that
effect.



From simoninusa2001 at yahoo.co.uk  Sun Feb 20 15:42:22 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 20 Feb 2005 12:42:22 -0800
Subject: PyQt Python Bindings for Qt v3.14 Released
In-Reply-To: <mailman.2854.1108891957.22381.python-list@python.org>
References: <mailman.2854.1108891957.22381.python-list@python.org>
Message-ID: <1108932142.624423.64060@o13g2000cwo.googlegroups.com>

All looks like good news, especially PyQt4 - one question, if it's
statically linked with Qt4, will it still work with things like py2exe?
I guess it just won't need qt-mt4.dll?

I'm getting a 404 on the new SIP:

http://www.river-bank.demon.co.uk/download/QScintilla/qscintilla-1.61-gpl-1.5.tar.gz



From aleaxit at yahoo.com  Tue Feb  8 06:01:23 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Tue, 8 Feb 2005 12:01:23 +0100
Subject: An Ode To My Two Loves
References: <mailman.1982.1107624858.22381.python-list@python.org>
	<slrnd0cn2e.rr5.jgrahn-nntq@frailea.sa.invalid>
Message-ID: <1grnyah.4715rt1xe8zsxN%aleaxit@yahoo.com>

Jorgen Grahn <jgrahn-nntq at algonet.se> wrote:

> I also notice I forget one language after doing another for a few weeks. And
> it's not just brackets and semicolons -- I also try to use one language's
> idioms in the other. People who /claim/ they have no trouble switching
> languages seem to have the same problem.

I don't find it a problem as long as the languages are simple and
well-separated.  Python and C are a good example: each is simple, and
each is pretty well-focused -- high-level vs low-level.

It's not necessarily easy if you're continuously going back and forth
between C++ and Java, for example -- in such a case, it seems to me that
transitioning into the proper mindset for each language may well be a
nonzero effort, since the languages aren't really all that simple, and
they have quite some overlap despite all the differences.

I have no experience with such switching between (say) Ruby and Python
-- both simple but vastly overlapping in scope.


Alex


From noreply at python.org  Sat Feb 12 00:04:57 2005
From: noreply at python.org (Post Office)
Date: Sat, 12 Feb 2005 06:04:57 +0100
Subject: Returned mail: Data format error
Message-ID: <200502120507.j1C57Cux031459@phoenix.szarvas.hu>

The original message was received at Sat, 12 Feb 2005 06:04:57 +0100
from [134.224.55.190]

----- The following addresses had permanent fatal errors -----
python-list at python.org



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From kbk at shore.net  Mon Feb 28 23:11:28 2005
From: kbk at shore.net (Kurt B. Kaiser)
Date: Mon, 28 Feb 2005 23:11:28 -0500 (EST)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200503010411.j214BShi009050@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  303 open ( -5) /  2764 closed ( +9) /  3067 total ( +4)
Bugs    :  849 open (+11) /  4837 closed ( +3) /  5686 total (+14)
RFE     :  169 open ( +1) /   148 closed ( +0) /   317 total ( +1)

New / Reopened Patches
______________________

New fpconst module  (2005-02-24)
       http://python.org/sf/1151323  opened by  Gregory Warnes

PyXxx_Check() speed-up  (2005-02-27)
       http://python.org/sf/1153056  opened by  Armin Rigo

os.remove error on Solaris  (2005-02-28)
       http://python.org/sf/1153417  opened by  Richard Philips

Patches Closed
______________

rlcompleter does not expand on [ ]  (2002-04-22)
       http://python.org/sf/547176  closed by  mwh

Non-blocking Socket Server  (2004-05-02)
       http://python.org/sf/946207  closed by  loewis

add urldecode() method to urllib  (2003-05-21)
       http://python.org/sf/740827  closed by  loewis

adding bool support to xdrlib.py  (2004-10-18)
       http://python.org/sf/1049151  closed by  loewis

PEP309 Partial implementation  (2004-04-25)
       http://python.org/sf/941881  closed by  rhettinger

sanity check for readline remove/replace  (2004-12-31)
       http://python.org/sf/1093585  closed by  loewis

PEP 309 LaTeX documentation  (2004-04-07)
       http://python.org/sf/931007  closed by  rhettinger

Build Patch #941881 (PEP 309 in C) on windows  (2004-08-10)
       http://python.org/sf/1006948  closed by  rhettinger

PEP 309 unit tests  (2004-04-07)
       http://python.org/sf/931010  closed by  rhettinger

New / Reopened Bugs
___________________

hotshot.runctx: builtins missing  (2005-02-23)
       http://python.org/sf/1149798  opened by  Jurjen N.E. Bos

macostools.mkdirs: not thread-safe  (2005-02-23)
       http://python.org/sf/1149804  opened by  Jurjen N.E. Bos

(XMLRPC) multitude of sockets ending up in TIME_WAIT  (2005-02-25)
       http://python.org/sf/1151968  opened by  Jonas Wid?n

Dict docstring error Python-2.3.5  (2005-02-26)
       http://python.org/sf/1152424  opened by  Colin J. Williams

urllib2 dont respect debuglevel in httplib  (2005-02-27)
       http://python.org/sf/1152723  opened by  abbatini

Default class args get clobbered by prior instances.  (2005-02-26)
CLOSED http://python.org/sf/1152726  opened by  Simon Drabble

curses.textpad raises error  (2005-02-27)
       http://python.org/sf/1152762  opened by  John McPherson

Setting socket timeout crashes SSL  (2005-02-27)
       http://python.org/sf/1153016  opened by  pristine777

http_error_302() crashes with 'HTTP/1.1 400 Bad Request  (2005-02-27)
       http://python.org/sf/1153027  opened by  pristine777

PyXxx_Check(x) trusts x->ob_type->tp_mro  (2005-02-27)
       http://python.org/sf/1153075  opened by  Armin Rigo

reflected operator not used when operands have the same type  (2005-02-27)
       http://python.org/sf/1153163  opened by  HughSW

reflected operator not used when operands have the same type  (2005-02-27)
CLOSED http://python.org/sf/1153171  opened by  HughSW

string interpolation breaks with %d and large float  (2005-02-28)
       http://python.org/sf/1153226  opened by  Stephen Thorne

eval does not bind variables in lambda bodies correctly  (2005-02-28)
       http://python.org/sf/1153622  opened by  Mattias Engdeg?rd

String interpolation needs PEP 237 update  (2005-02-28)
       http://python.org/sf/1153769  opened by  Richard Brodie

Bugs Closed
___________

Python24.dll crashes, EXAMPLE ATTACHED  (2005-02-12)
       http://python.org/sf/1121201  closed by  complex

Default class args get clobbered by prior instances.  (2005-02-26)
       http://python.org/sf/1152726  closed by  rhettinger

reflected operator not used when operands have the same type  (2005-02-27)
       http://python.org/sf/1153171  closed by  rhettinger

New / Reopened RFE
__________________

Enhance file.readlines by making line separator selectable  (2005-02-26)
       http://python.org/sf/1152248  opened by  Nick Coghlan



From steve at ferg.org  Sun Feb 27 16:32:30 2005
From: steve at ferg.org (Steve)
Date: 27 Feb 2005 13:32:30 -0800
Subject: How to define a window's position (Tkinter)
In-Reply-To: <1109516700.351898.72850@l41g2000cwc.googlegroups.com>
References: <1109516700.351898.72850@l41g2000cwc.googlegroups.com>
Message-ID: <1109539950.592005.96520@f14g2000cwb.googlegroups.com>

I suspect you need to retrieve the window size, calculate the position
based on the size, and reset size and position.

You might look at http://www.ferg.org/easygui/index.html for some
ideas.  Scroll down to the definition of the __choicebox routine.

Good luck!

-- Steve Ferg



From brian at sweetapp.com  Mon Feb 28 08:04:06 2005
From: brian at sweetapp.com (Brian Quinlan)
Date: Mon, 28 Feb 2005 14:04:06 +0100
Subject: best XSLT processor?
In-Reply-To: <yvgUd.9678$_G.5042@clgrps12>
References: <yvgUd.9678$_G.5042@clgrps12>
Message-ID: <422316C6.4060701@sweetapp.com>

fanbanlo wrote:
> Which XSLT processor is the most reliable?
> 
> requirement:
> + must support Python 2.4
> + must run w/ Windows (and Linux)
> + not super slow
> 
> My python project needs a XSLT processor + Docbook's XSLT to translate 
> from docbook-xml -> HTML.
> 
> PyXML? is it reliable? Slow?
> 4Suite? some said it is buggy (lots of work arounds)?
> Others ???

You could try Pyana (pyana.sourceforge.net). It's a binding to the 
Apache Group's Xalan engine. I don't think that it is a flexable as 
4Suite but it is probably faster and more standards compliant (it was 
the last time that I checked).

Cheers,
Brian


From roy at panix.com  Thu Feb 10 21:34:06 2005
From: roy at panix.com (Roy Smith)
Date: Thu, 10 Feb 2005 21:34:06 -0500
Subject: Unit Testing in Python
References: <1108087841.271630.228970@o13g2000cwo.googlegroups.com>
Message-ID: <roy-D161EC.21340610022005@reader2.panix.com>

In article <1108087841.271630.228970 at o13g2000cwo.googlegroups.com>,
 "rhat" <fakeadmin at gmail.com> wrote:

> Hi Everyone,
> I've recently been reading some articles about unit-testing in Python
> [1] [2], but I am a bit confused: where do I go to get started with
> this? I tried googling for "unittest" but all I've found are some old
> links to projects that already use it, and the older (as the articles
> put it) PyUnit project. I'm sorry if this is a obvious question or one
> that has already been answered, but unit-testing sounds interesting and
> I'm not sure where to start.
> 
> Thanks,
> Ryan Kaulakis

PyUnit is indeed what I use.  It's included in current distributions as the 
"unittest" module.

The module docs aren't perfect (especially when it comes to the big 
picture), but there's a good tutorial at 
http://diveintopython.org/unit_testing/index.html

Once you get your head around how it works, it's really quite simple to 
use.  It also has the advantage of being one of a series of "X-unit" 
packages for different languages (Junit, C++Unit, etc) which all have the 
same organization (with allowances made for language-specific 
requirements).  This means once you've learned one, you've got a big head 
start one learning another one.


From fredrik at pythonware.com  Fri Feb 11 16:14:41 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 11 Feb 2005 22:14:41 +0100
Subject: is there a safe marshaler?
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl><420b9135$0$28982$e4fe514c@news.xs4all.nl><3b091a1c.0502110634.5edb1987@posting.google.com><mailman.2405.1108144870.22381.python-list@python.org>
	<cuit7n$jje$1@panix3.panix.com>
Message-ID: <cuj73r$kji$1@sea.gmane.org>

(repost; gmane seems to have eaten my original post)

Aahz wrote:

>>It's not clear to me that if marshal is unsafe how XML could be safe.  In
>>this context they are both just serializations of basic Python data
>>structures.
>
> The difference is that parsing XML -- even badly malformed -- won't
> crash Python.

optimist.

>>> import os
>>> os.path.getsize("BL.xml")
1302
>>> from xml.dom import minidom
>>> x = minidom.parse("BL.xml")

(have patience.  have lots of patience.)

</F> 





From john at grulic.org.ar  Fri Feb 18 00:22:27 2005
From: john at grulic.org.ar (John Lenton)
Date: Fri, 18 Feb 2005 02:22:27 -0300
Subject: low-end persistence strategies?
In-Reply-To: <1108702957.327528.22010@z14g2000cwz.googlegroups.com>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<mailman.2735.1108616299.22381.python-list@python.org>
	<1108622622.119311.43200@f14g2000cwb.googlegroups.com>
	<mailman.2746.1108629315.22381.python-list@python.org>
	<1108629775.800508.3400@f14g2000cwb.googlegroups.com>
	<mailman.2777.1108674138.22381.python-list@python.org>
	<1108702957.327528.22010@z14g2000cwz.googlegroups.com>
Message-ID: <20050218052226.GA5452@grulic.org.ar>

On Thu, Feb 17, 2005 at 09:02:37PM -0800, Michele Simionato wrote:
> > John Lenton:
> Also, if you use something where the process doesn't terminate between
> calls (such as mod_python, I guess), you have to be sure to write the
> try/finallys around your locking code, because the OS only cleans up
> the lock when the process exits.
> 
> This is what I feared. What happens in the case of a power failure?
> Am I left with locked files floating around?

no.

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
Los hijos de los buenos, capa son de duelo 
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From secun at yahoo.com  Wed Feb  9 16:14:36 2005
From: secun at yahoo.com (Chris)
Date: Wed, 09 Feb 2005 21:14:36 GMT
Subject: Python and version control
References: <XNrOd.1657$Mw3.72@amstwist00>
	<mailman.2266.1107978884.22381.python-list@python.org>
Message-ID: <MPG.1c74478bc8221768989695@news2.atlantic.net>

In article <mailman.2266.1107978884.22381.python-list at python.org>, 
gmane-schpam at joefrancia.com says...



> I don't know that you'll find a common approach.  I use Subversion for 
> version control.  For larger projects, I use Eclipse with the Pydev 
> plugin for editing, and the Subclipse plugin for talking to Subversion. 
>   For smaller things, I usually just edit with SciTE and use the 
> TortoiseSVN Explorer extension or the command-line utilities for 
> checkins and updates.
> 
> Peace,
> Joe
> 
Hi Joe,

I'm curious. Why do you only use Eclipse for big projects? 


From nick at craig-wood.com  Wed Feb 23 01:49:54 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 23 Feb 2005 06:49:54 GMT
Subject: Comm. between Python and PHP
References: <lnsm11d91ug2gfh5gjvutga4dthhg0rjbf@4ax.com>
	<nfWdnY2gUtSY5IbfRVn-tw@powergate.ca>
Message-ID: <slrnd1n5s6.rsd.nick@irishsea.home.craig-wood.com>

Peter Hansen <peter at engcorp.com> wrote:
>  Nils Emil P. Larsen wrote:
> > What is the easiest way to make my threaded Python daemon communicate
> > with a PHP-script running from Apache2 on localhost?
> 
>  "Easiest" of course depends on lots of things, and mostly on
>  specifics that you haven't told us, and your personal preference.
> 
>  Two obvious possibilities that come to mind are "write a file
>  somewhere from PHP and poll for updates from Python", and
>  "use sockets (TCP)" or "use UDP".

If the data you want to pass is structured then you might consider
XML-RPC which is a cross platform way of passing structured data
around.  XML-RPC is part of the python standard library
(SimpleXMLRPCServer and xmlrpclib) and there seem to be several
implementations for PHP

  http://www.google.co.uk/search?q=xml+rpc+php

That might be overkill for what you want though!
-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From grumman at example.com  Sun Feb 13 21:29:34 2005
From: grumman at example.com (Grumman)
Date: Sun, 13 Feb 2005 21:29:34 -0500
Subject: Considering python - have a few questions.
In-Reply-To: <eZAPd.21496$Ka6.148459@news1.mts.net>
References: <eZAPd.21496$Ka6.148459@news1.mts.net>
Message-ID: <C2UPd.2033$x77.1735@fe02.lga>


> I would want the program to run in Windows for sure.  If it could work on a
> Mac and other systems, that would be a plus. 
<snip>
> btw - I have the database designed (and the program info database filled) in
> Access....

If running on a Mac really is a goal, ditch Access, its windows only. 
You'd want to look into MySQL, PostgreSQl or some such for 
inter-platform use.


From claird at lairds.us  Wed Feb 23 22:08:12 2005
From: claird at lairds.us (Cameron Laird)
Date: Thu, 24 Feb 2005 03:08:12 GMT
Subject: python tutorial/projects
References: <cvgf2o$u42$1@agate.berkeley.edu>
	<TKPSd.9826$Sl3.304799@news4.e.nsc.no>
Message-ID: <ctpve2-h6u.ln1@lairds.us>

In article <TKPSd.9826$Sl3.304799 at news4.e.nsc.no>,
Leif B. Kristensen <abuse at solumslekt.org> wrote:
>Danny skrev:
>
>> Does anyone know of a good python tutorial?
>> I was also looking for some non-trivial projects to do in python.
> 
>There's a lot of projects on Sourceforge that are written in Python,
>where you're free to study the code and maybe participate, if you've
>got what it takes.
> 
>> Basically I would like to claim on my resume, that I know python, with
>> out bad karma.
>
>Your stance is a difficult one, and one that is hard to conciliate with
>the Zen of Hacking. Search for enlightenment first, my son, and the
>rest will be given to you freely.
>-- 
>Leif Biberg Kristensen

Should we just tell Danny to come to a PyCon?  'Bet we could put
him to use in a Sprint.  There's work that fits even the rawest
beginners, if they have the right attitude.


From jfj at freemail.gr  Sun Feb  6 20:39:40 2005
From: jfj at freemail.gr (jfj)
Date: Sun, 06 Feb 2005 17:39:40 -0800
Subject: Confused with methods
Message-ID: <4206C6DC.5050602@freemail.gr>

I don't understand.
We can take a function and attach it to an object, and then call it
as an instance method as long as it has at least one argument:

#############
class A:
   pass

def foo(x):
   print x

A.foo = foo
a=A()
a.foo()
#############

However this is not possible for another instance method:

############
class A:
  pass

class B:
  def foo(x,y)
      print x,y

b=B()
A.foo = b.foo
a=A()

# error!!!
a.foo()
##############

Python complains that 'foo() takes exactly 2 arguments (1 given)'.
But by calling "b.foo(1)" we prove that it is indeed a function which takes
exactly one argument.

Isn't that inconsistent?

Thanks,

Gerald.



From mahs at telcopartners.com  Thu Feb 17 13:26:02 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 17 Feb 2005 10:26:02 -0800
Subject: check if object is number
In-Reply-To: <2j89115tsnur135nfm06lh509482mdb16h@4ax.com>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>	<374t0mF4te5vbU1@individual.net>	<7tOdnYs6NtrV7JDfRVn-vQ@powergate.ca>	<mLKdnbj4O4gQH5DfRVn-iA@comcast.com>	<mailman.2456.1108249466.22381.python-list@python.org>	<tKidnT6fyKm_DpPfRVn-pA@comcast.com>	<mailman.2459.1108252868.22381.python-list@python.org>
	<2j89115tsnur135nfm06lh509482mdb16h@4ax.com>
Message-ID: <cv2neb$gg8$1@sea.gmane.org>

Christos TZOTZIOY Georgiou wrote:
> On Sat, 12 Feb 2005 16:01:26 -0800, rumours say that Michael Spencer
> <mahs at telcopartners.com> might have written:
> 
> 
>>>Yup, that's basically what I'm doing right now.  The question was really 
>>>how to define that adapter function. =)
>>>
>>>Steve
>>
>>OK - then my entry is:
>>	assert obj+1 >= 1
>>:-)
> 
> 
> So -1 is not a number.
At least not a legal one for Steven's function as I understood it

Michael



From rbt at athop1.ath.vt.edu  Tue Feb 15 16:39:04 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Tue, 15 Feb 2005 16:39:04 -0500
Subject: os.walk() usage
In-Reply-To: <1108490688.466311.115920@l41g2000cwc.googlegroups.com>
References: <cut8ur$3v6$1@solaris.cc.vt.edu>
	<1108490688.466311.115920@l41g2000cwc.googlegroups.com>
Message-ID: <cutq5o$skb$1@solaris.cc.vt.edu>

wittempj at hotmail.com wrote:
> every object in os.walk() returns a 3-tuple, like below, it seems your
> code assumes it returns only a list of files.
> 
> for d in os.walk('c:\\temp'):
> 	(dirpath, dirnames, filenames) = d
> 	print dirpath
> 	print dirnames
> 	print filenames
> 

Thank you, this fixed it. I didn't read the docs well enough ;)


From aurora00 at gmail.com  Fri Feb 18 13:08:51 2005
From: aurora00 at gmail.com (aurora)
Date: Fri, 18 Feb 2005 10:08:51 -0800
Subject: Newbie CGI problem
References: <mailman.2809.1108746657.22381.python-list@python.org>
	<cv5920$frm$05$1@news.t-online.com>
Message-ID: <opsmenc10i6yt6e7@news.cisco.com>

On Fri, 18 Feb 2005 18:36:10 +0100, Peter Otten <__peter__ at web.de> wrote:

> Rory Campbell-Lange wrote:
>
>> #!/usr/bin/python
>> import cgi
>> print "Content-type: text/html\n\n"
>> print "hi"
>>
>> Gives me the following in my browser:
>>
>> '''
>> hi
>> Content-type: text/html
>>
>>
>> hi
>> '''
>>
>> Why are there two 'hi's?
>
> You have chosen a bad name for your script: cgi.py.
> It is now self-importing. Rename it to something that doesn't clash with  
> the
> standard library, and all should be OK.
>
> Peter
>

You are genius.


From xah at xahlee.org  Wed Feb  2 09:29:00 2005
From: xah at xahlee.org (Xah Lee)
Date: 2 Feb 2005 06:29:00 -0800
Subject: how to write a tutorial
In-Reply-To: <1106723545.429728.308620@f14g2000cwb.googlegroups.com>
References: <1106305730.361540.21010@f14g2000cwb.googlegroups.com>
	<1106472508.591411.40140@c13g2000cwb.googlegroups.com>
	<1106723545.429728.308620@f14g2000cwb.googlegroups.com>
Message-ID: <1107354540.608556.305540@z14g2000cwz.googlegroups.com>

in the doc for re module
http://python.org/doc/lib/module-re.html

4.2.2 on Matching vs Searching
http://python.org/doc/lib/matching-searching.html

Its mentioning of Perl is irrelevant, since the majority reading that
page will not have expertise with Perl regex. The whole section should
be deleted, because it only adds confusion. (later section 4.2.3 on
search and match methods plainly indicated their difference.)

(the mentioning of perl there is a combination of author masterbation,
ass kissing, and Python fanaticism. All together innocently done as
ignorance of standard authors.)

A detailed explanation of their difference or the mentioning of Perl
should be in FAQ or such material.

in section 4.2.6 Examples, there needs to be more and simple examples.
(e.g. http://xahlee.org/perl-python/regex.html.) The beginning large
section about some scaf() should be deleted for the same reason as the
Perl above.

-------------------------

in section 11.12.2 SMTP Examples
http://python.org/doc/lib/SMTP-example.html

the example given is turgid.

In a tutorial or documentation, you want to give example as short and
to the point as possible. In this case, it is illustrating how to use
smtplib, not how to preamble with nice command line interface. A better
example would be like:

import smtplib
smtpServer='smtp.yourdomain.com';
fromAddr='xah at xahlee.org';
toAddr='xah at xahlee.org';
text='''Subject: test test

Hi ...
'''

server = smtplib.SMTP(smtpServer)
server.set_debuglevel(1)
server.sendmail(fromAddr, toAddr, text)
server.quit()
Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From stewart.midwinter at gmail.com  Wed Feb  9 22:42:19 2005
From: stewart.midwinter at gmail.com (stewart.midwinter at gmail.com)
Date: 9 Feb 2005 19:42:19 -0800
Subject: What's wrong with `is not None`?
In-Reply-To: <42096CD0.D6EA3300@yahoo.com>
References: <mailman.2219.1107903975.22381.python-list@python.org>
	<42096CD0.D6EA3300@yahoo.com>
Message-ID: <1108006939.663537.215460@c13g2000cwb.googlegroups.com>

btw, 'isnot' is not pronounced "is-not" but rather "i-snot".  :-)

S



From simon.brunning at gmail.com  Thu Feb 10 12:47:33 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Thu, 10 Feb 2005 17:47:33 +0000
Subject: [N00B] What's %?
In-Reply-To: <614c778e.0502100938.6665cb52@posting.google.com>
References: <614c778e.0502100938.6665cb52@posting.google.com>
Message-ID: <8c7f10c605021009475ac20088@mail.gmail.com>

On Thu, 10 Feb 2005 09:41:07 -0800 (PST), administrata
<administrata at hotmail.com> wrote:
> Hi! it's been about a week learning python!
> I've read 'python programming for the absolute begginer'

I hope you are enjoying it. ;-_

> I don't understand about % like...
> 
> 107 % 4 = 3
> 7 % 3 = 1

It;'s modular aritmetic. See
<http://en.wikipedia.org/wiki/Modular_arithmetic> and
<http://www.python.org/doc/2.3.4/ref/binary.html>.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From francis.girard at free.fr  Tue Feb  8 01:42:31 2005
From: francis.girard at free.fr (Francis Girard)
Date: Tue, 8 Feb 2005 07:42:31 +0100
Subject: WYSIWYG wxPython "IDE"....?
In-Reply-To: <1107820577.092732.30000@l41g2000cwc.googlegroups.com>
References: <1107560658.584623.303310@o13g2000cwo.googlegroups.com>
	<613f0158aqibks8kvnptbmq3hum6hgs6f1@4ax.com>
	<1107820577.092732.30000@l41g2000cwc.googlegroups.com>
Message-ID: <200502080742.33175.francis.girard@free.fr>

Le mardi 8 F?vrier 2005 00:56, Simon John a ?crit?:
> With the news of a GPL Qt4 for Windows, I decided to go with PyQt:
>
> http://mats.imk.fraunhofer.de/pipermail/pykde/2005-February/009527.html
>
> I just knocked up my application (GUI, backend is still in progress)
> using QtDesigner in about 5 minutes, and it's layout is just how I want
> it!

Exactly the same for me. Qt is just a pure marvel. I hope this will not kill 
wx though. We need diversity. It might very well be that wx gpl on windows 
was one of the factor that made Troll decide to do the same with Qt.

Francis Girard



From irmen.NOSPAM at xs4all.nl  Mon Feb 14 16:31:20 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Mon, 14 Feb 2005 22:31:20 +0100
Subject: is there a safe marshaler?
In-Reply-To: <7xmzu6q4cv.fsf@ruckus.brouhaha.com>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<1108051828.483222.62670@z14g2000cwz.googlegroups.com>
	<7xmzu6q4cv.fsf@ruckus.brouhaha.com>
Message-ID: <4211185b$0$28982$e4fe514c@news.xs4all.nl>

Paul Rubin wrote:
> There's another issue with marshal that makes it unsuitable for Pyro,
> which is that its data format is (for legitimate reasons) not
> guaranteed to be the same across different Python releases.  That
> means that if the two ends of the Pyro application aren't using the
> same Python version, they might not be able to interoperate.

Paul, the default serialization protocol that Pyro uses is pickle
(with the highest available protocol number). So there is a risk
already that it doesn't interoperate with older Python versions,
unless you configure the max pickle protocol or switch to using
one of the supported XML serializations.
For mobile code, Pyro relies on the transfer of the actual
bytecode and this won't work at all no matter what if you use
different Python versions. Unless the bytecode happens to be
the same (consider yourself lucky).

--Irmen


From wweston at att.net  Thu Feb 17 14:49:08 2005
From: wweston at att.net (wes weston)
Date: Thu, 17 Feb 2005 19:49:08 GMT
Subject: namespace collisions
In-Reply-To: <4214e074$0$32617$db0fefd9@news.zen.co.uk>
References: <4214e074$0$32617$db0fefd9@news.zen.co.uk>
Message-ID: <Uy6Rd.49238$Th1.21720@bgtnsc04-news.ops.worldnet.att.net>

Will McGugan wrote:
> Hi,
> 
> I'm accumulating a number of small functions, which I have sensibly put 
> in a single file called 'util.py'. But it occurs to me that with such a 
> generic name it could cause problems with other modules not written by 
> myself. Whats the best way of handling this? If I put it in a common 
> location in my Python path, should I call it willsutil.py?
> 
> TIA,
> 
> Will McGugan
Will,
   See  http://www.boost.org/libs/python/doc/tutorial/doc/html/python/techniques.html

'about page 30 of google search. It gives an example
that should help.
wes



From sjmachin at lexicon.net  Thu Feb  3 06:00:34 2005
From: sjmachin at lexicon.net (John Machin)
Date: 3 Feb 2005 03:00:34 -0800
Subject: Crashing Python interpreter! (windows XP, python2.3.4, 2.3.5rc1,
	2.4.0)
In-Reply-To: <mailman.1798.1107416664.22381.python-list@python.org>
References: <mailman.1798.1107416664.22381.python-list@python.org>
Message-ID: <1107428434.377855.249080@z14g2000cwz.googlegroups.com>


Leeuw van der, Tim wrote:
>
>> > Do you have a file called drwtsn32.log anywhere on your computer?
>
> No, unfortunately I cannot find such file anywhere on my computer....
>
> What do I do to get such file? Or anything equally useful?
>

On my Windows 2000 box, just crash something :-)

Perhaps this may help:

http://www.windowsnetworking.com/kbase/WindowsTips/Windows2000/RegistryTips/RegistryTools/DrWatson.html



From michele.simionato at gmail.com  Thu Feb 17 01:43:42 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 16 Feb 2005 22:43:42 -0800
Subject: low-end persistence strategies?
In-Reply-To: <mailman.2735.1108616299.22381.python-list@python.org>
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<mailman.2735.1108616299.22381.python-list@python.org>
Message-ID: <1108622622.119311.43200@f14g2000cwb.googlegroups.com>

<snip simple example with flock>

What happens if for any reason the application crashes?
Locked files will stay locked or not? And if yes, how do I
unlock them?

               Michele Simionato



From max at alcyone.com  Mon Feb 14 20:32:29 2005
From: max at alcyone.com (Erik Max Francis)
Date: Mon, 14 Feb 2005 17:32:29 -0800
Subject: Write Unicode str as utf-8
In-Reply-To: <mailman.2600.1108429664.22381.python-list@python.org>
References: <mailman.2600.1108429664.22381.python-list@python.org>
Message-ID: <wq6dnWENCdqwzIzfRVn-1A@speakeasy.net>

kent sin wrote:

> Python support unicode, but some library don't. Write
> is one of them. 
> 
> When writing a csv file, The rows contains numbers and
> unicode str. It is a little pain to first convert all
> unicode str to utf-8 before writing the row.

Why?

	S = U.encode('utf-8')

> Are there anyway I can patch python such that It will
> convert the unicode string to utf-8 before the write?
> Where should I start?

codecs.open

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   Describe a circle, stroke its back and it turns vicious.
   -- Ionesco


From ncoghlan at iinet.net.au  Tue Feb  8 05:45:01 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Tue, 08 Feb 2005 20:45:01 +1000
Subject: variable declaration
In-Reply-To: <slrnd0h3e9.26q.apardon@rcpc42.vub.ac.be>
References: <4202A022.3050209@netscape.net>	<MSGID_2=3A5025=2F3.131_4204b0a9@fidonet.org>	<mailman.1978.1107622451.22381.python-list@python.org>	<slrnd0epjg.26q.apardon@rcpc42.vub.ac.be>	<mailman.2069.1107783321.22381.python-list@python.org>	<slrnd0esqn.26q.apardon@rcpc42.vub.ac.be>	<mailman.2152.1107854937.22381.python-list@python.org>
	<slrnd0h3e9.26q.apardon@rcpc42.vub.ac.be>
Message-ID: <4208982D.2000401@iinet.net.au>

Antoon Pardon wrote:
> I have the impression you are looking at this too much from the view
> of the current implementation where putting a an entry in
> a directory is seen as an atomic operation.

Yes and no. I *am* looking at it from an implementation point of view, but 
dictionaries have nothing to do with the relevant part of the implementation.

The CPython *_FAST opcodes relate to functions' local variables. Behind the 
scenes they are implemented as integer indexing operations into a pre-sized C 
array. Operations don't come much faster than that :)

Could a rebinding operation *theoretically* be quicker for the other cases which 
involve a real dictionary (or something that looks like one)? Well, perhaps. 
Although I can't see how the rebinding operation would gain a benefit that a 
standard binding operation wouldn't gain if placed at the exact same point.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From cam.ac.uk at mh391.invalid  Mon Feb 14 04:46:12 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Mon, 14 Feb 2005 09:46:12 +0000
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cupqb6$1oi$1@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr> <cup249$svu$1@gemini.csx.cam.ac.uk>
	<cupqb6$1oi$1@usenet.otenet.gr>
Message-ID: <cups17$kbs$1@gemini.csx.cam.ac.uk>

Ilias Lazaridis wrote:
> Michael Hoffman wrote:
> 
> Can you please point me (and the readers) to this resource?

http://www.cygwin.com/

>> Why don't you solve this problem and produce a patched version of 
>> Python that does what you want.
> 
> I'm not intrested in patching.
> 
> I'm intrested in a stable environment, supported by the original
> implementors.

And the core developers are not interested in doing more than what they
have already done without further help (e.g. from you). Surely you can
"not interested" as you have justified your own inaction through it.

> This does not increase my trust in python [e.g. as an exchange for JAVA].

You cannot run all Java programs on an open source compiler, so I guess
it's an imperfect world for you. And to get GCJ to run on MinGW you have to
add a lot of patches.

>> Now why haven't *you* produced a version of Python that is directly 
>> compileable with MinGW? Time's a-wasting.
> 
> I have stated already that I am a newcomer to python.
> 
> [you should really avoid this tenor.

And you should avoid yours. Your sense of entitlement is palpable.

 > Python is not an open-source project of a few teenies. It's a serious
 > programming-language, which could be adopted by e.g. more
 > phone-manufacturers (after Nokia)]

The idea that MinGW support would affect that is laughable.
-- 
Michael Hoffman


From mahs at telcopartners.com  Fri Feb  4 17:25:34 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 04 Feb 2005 14:25:34 -0800
Subject: changing local namespace of a function
In-Reply-To: <cu0lru$8ik$1@joe.rice.edu>
References: <cu0lru$8ik$1@joe.rice.edu>
Message-ID: <cu0sj5$sfk$1@sea.gmane.org>

Bo Peng wrote:
> Dear list,
> 
> I have many dictionaries with the same set of keys and I would like to 
> write a function to calculate something based on these values. For 
> example, I have
> 
> a = {'x':1, 'y':2}
> b = {'x':3, 'y':3}
> 
> def fun(dict):
>   dict['z'] = dict['x'] + dict['y']
> 
> fun(a) and fun(b) will set z in each dictionary as the sum of x and y.
> 
> My function and dictionaries are a lot more complicated than these so I 
> would like to set dict as the default namespace of fun. Is this 
> possible? The ideal code would be:
> 
> def fun(dict):
>   # set dict as local namespace
>   # locals() = dict?
>   z = x + y
As you no doubt have discovered from the docs and this group, that isn't doable 
with CPython.

If you must write your functions as real functions, then you might do something 
like this:

  >>> a = {'x':1, 'y':2}
  >>> b = {'x':3, 'y':3}
  ...
  >>> def funa(x,y, **kw):
  ...     del kw     #Careful of unwanted names in locals with this approach
  ...     z = x + y
  ...     return locals()
  ...
  >>> a.update(funa(**a))
  >>> b.update(funa(**b))
  >>> a
{'y': 2, 'x': 1, 'z': 3}
  >>> b
{'y': 3, 'x': 3, 'z': 6}
  >>>


Alternatively, you could use exec:

  >>> a = {'x':1, 'y':2}
  >>> b = {'x':3, 'y':3}
  >>> exec "z = x + y" in globals(), a
  >>> a
{'y': 2, 'x': 1, 'z': 3}
  >>> exec "z = x + y" in globals(), b
  >>> b
{'y': 3, 'x': 3, 'z': 6}
  >>>

Michael



From ilias at lazaridis.com  Tue Feb 15 14:58:09 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 21:58:09 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2644.1108496325.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr>	<cupstp$an7$2@ctb-nnrp2.saix.net>	<cupupa$kfs$2@usenet.otenet.gr>	<cupvhi$c15$1@news1.ucsd.edu>	<cuq084$r99$1@usenet.otenet.gr>	<cuq2h0$j2s$1@eeyore.INS.cwru.edu>	<cuq57b$j83$1@usenet.otenet.gr>	<37bkemF5a7s7vU1@individual.net>	<cut6nh$rpk$1@usenet.otenet.gr>	<86ll9piuj8.fsf@guru.mired.org>
	<cutf1h$576$1@usenet.otenet.gr>
	<mailman.2644.1108496325.22381.python-list@python.org>
Message-ID: <cutk8f$qu2$1@usenet.otenet.gr>

Joe Francia wrote:
> Ilias Lazaridis wrote:
[...]
>> MinGW compatibility is not [only] my need.
>>
>> It is an community need [at least partially]
> 
> You keep using that word "community". I do not think it means what you 
> think it means.

The community is everyone around python (including me at this moment).

We could call i userbase, too, but one needs not to be a actual user to 
be a community member.

what do you think about?

.

-- 
http://lazaridis.com


From stephen.thorne at gmail.com  Tue Feb  8 16:07:55 2005
From: stephen.thorne at gmail.com (Stephen Thorne)
Date: Wed, 9 Feb 2005 07:07:55 +1000
Subject: Loop in list.
In-Reply-To: <opslwwd7g71js0xs@news.telkomsa.net>
References: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
	<opslwwd7g71js0xs@news.telkomsa.net>
Message-ID: <3e8ca5c805020813074e975a4d@mail.gmail.com>

On Tue, 08 Feb 2005 23:07:09 -0500, Caleb Hattingh <caleb1 at telkomsa.net> wrote:
> '>>> a = [i*2*b for i in range(3) for b in range(4)]
> '>>> a
> [0, 0, 0, 0, 0, 2, 4, 6, 0, 4, 8, 12]
> 
> Might take you a while to correlate the answer with the loop, but you
> should be able to see after a while that this nesting is the same as
> 
> '>>> a = []
> '>>> for b in range(4):
> '>>>     for i in range(3):
> '>>>         a.append(i*2*b)

There is a subtle error in this explanation. The equivilence actually
looks like:

'> a = []
'> l1 = range(4)
'> l2 = range(3)
'> for b in l1:
'>     for i in l2:
'>         a.append(i*2*b)

Stephen


From irmen.NOSPAM at xs4all.nl  Thu Feb 10 11:57:36 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Thu, 10 Feb 2005 17:57:36 +0100
Subject: is there a safe marshaler?
In-Reply-To: <1108051828.483222.62670@z14g2000cwz.googlegroups.com>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<1108051828.483222.62670@z14g2000cwz.googlegroups.com>
Message-ID: <420b9281$0$28982$e4fe514c@news.xs4all.nl>

Hello Guido

guido at python.org wrote:
> Irmen de Jong wrote:
> 
>>Pickle and marshal are not safe. They can do harmful
>>things if fed maliciously constructed data.
>>That is a pity, because marshal is fast.
> 
> 
> I think marshal could be fixed; the only unsafety I'm aware of is that
> it doesn't always act rationally when confronted with incorrect input
> like bad type codes or truncated input. It only receives instances of
> the built-in types and it never executes user code as a result of
> unmarshalling.

So it is not vulnerable in the way that pickle is? That's a start.
The security warning in the marsal doc then makes it sound worse than
it is...

> Perhaps someone would be interested in submitting a patch to the
> unmarshalling code? Since this is a security fix we'd even accept a fix
> for 2.3.

That would be nice indeed :)


>>I need a fast and safe (secure) marshaler.
>>Is xdrlib the only option?
>>I would expect that it is fast and safe because
>>it (the xdr spec) has been around for so long.
> 
> 
> I don't expect that to be particularly fast, since it mostly operates
> at Python speed.

Ah, I wasn't aware that xdrlib was implemented in Python :)
I thought it used a (standard?) C-implementation.
But I now see that it's a Python module (utilizing struct).

> I think it could be safe but I would still do a
> thorough code review if I were you -- the code is older than my
> awareness of the vulnerabilities inherent in this kind of remote data
> transfer.

Thanks for the warning.

--Irmen de Jong


From zerok at zerokspot.com  Tue Feb 22 11:20:42 2005
From: zerok at zerokspot.com (Horst Gutmann)
Date: Tue, 22 Feb 2005 17:20:42 +0100
Subject: Problem with minidom and special chars in HTML
Message-ID: <421b5b8c$1@news.uni-klu.ac.at>

Hi :-)
I currently have quite a big problem with minidom and special chars (for 
example &uuml;)  in HTML.

Let's say I have following input file:
--------------------------------------------------
<?xml version="1.0"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
             "http://www.w3.org/TR/html4/strict.dtd">
<html>
<body>
&uuml;
</body>
</html>
--------------------------------------------------

And following python script:
--------------------------------------------------
from xml.dom import minidom
if __name__ == '__main__':
	doc = minidom.parse('test2.html')
	f = open('test3.html','w+')
	f.write(doc.toxml())
	f.close()
--------------------------------------------------

test3.html only has a blank line where should be the &uuml; It is simply 
removed.

Any idea how I could solve this problem?

MfG, Horst


From ola.natvig at infosense.no  Fri Feb  4 08:12:01 2005
From: ola.natvig at infosense.no (Ola Natvig)
Date: Fri, 04 Feb 2005 14:12:01 +0100
Subject: dynamic func. call
In-Reply-To: <ctvrdk$evf$1@bagan.srce.hr>
References: <ctvrdk$evf$1@bagan.srce.hr>
Message-ID: <1u8cd2-6vi.ln1@pluto.i.infosense.no>

Aljosa Mohorovic wrote:
> can i do something like this:
> 
> s = "myFunction"
> a = s() # equals to: a = myFunction()
> 
> 

a = locals()[x]()

locals() returns a dictionary with string keys that you can use

-- 
--------------------------------------
  Ola Natvig <ola.natvig at infosense.no>
  infoSense AS / development


From ncoghlan at iinet.net.au  Sun Feb 13 09:25:35 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Mon, 14 Feb 2005 00:25:35 +1000
Subject: [NooB] a Variable in multiple quotes...
In-Reply-To: <cunm34$s1i$1@gemini.csx.cam.ac.uk>
References: <614c778e.0502130204.5824cddf@posting.google.com>
	<cunm34$s1i$1@gemini.csx.cam.ac.uk>
Message-ID: <420F635F.6000800@iinet.net.au>

Michael Hoffman wrote:
>  This is a fairly friendly group and they will answer even
> newbie questions amicably.

Albeit with the occasional pointed comment about not at least skimming the 
tutorial when it covers the question asked ;)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From marmille at gmail.com  Tue Feb  8 06:37:40 2005
From: marmille at gmail.com (Martin Miller)
Date: 8 Feb 2005 03:37:40 -0800
Subject: Curses on Windows
References: <72c8d50d.0502060630.1c561599@posting.google.com>
Message-ID: <1107862660.561823.111110@g14g2000cwa.googlegroups.com>

I just tried the flangy.com link and it appears to be OK now.

Martin

============
Peter wrote:
> ...
> One reply (in fact the only reply - thanks Tim Golden) suggested I
> look at http://flangy.com/dev/python/curses/



From tjreedy at udel.edu  Mon Feb 28 13:54:59 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 28 Feb 2005 13:54:59 -0500
Subject: Newbie question
References: <cvv8k2$19ov$1@newsreader02.ops.uunet.co.za>
Message-ID: <cvvp5i$rct$1@sea.gmane.org>


For future reference, an informative subject line like

> How do I display an image in Python?

is more likely to grab the attention of someone with the information 
sought.

tjr





From rson at new.rr.com  Wed Feb  9 10:24:21 2005
From: rson at new.rr.com (hawkmoon269)
Date: 9 Feb 2005 07:24:21 -0800
Subject: probably weird or stupid newbie dictionary question
Message-ID: <1107962661.011759.30100@f14g2000cwb.googlegroups.com>

I've read in several places that a Python dictionary is analagous to
some other languages' hash table (Perl's, for instance).  But FMU a
dictionary's keys are *themselves* hashed so that a hash table exists
that maps hashed key values to keys in the dictionary.  ISTM, then,
that the analogy is at least somewhat faulty...except for the fact that
a dictionary's keys could themselves be hashed redundantly...i.e., the
values to be used as keys could be hashed, inserted into the dictionary
(and mapped to their values, of course), and they would then be hashed
(again) behind the scenes...IOW, ISTM that a dictionary is correctly
understood generally as a mapping (as documentation indicates) and
*could* be understood as a special case hash table itself...Is that
accurate?

h



From nytimes at swiftdsl.com.au  Tue Feb  1 05:47:30 2005
From: nytimes at swiftdsl.com.au (huy)
Date: Tue, 01 Feb 2005 21:47:30 +1100
Subject: Next step after pychecker
In-Reply-To: <7xis5cq5bj.fsf@ruckus.brouhaha.com>
References: <41ff0308$0$6503$636a15ce@news.free.fr>
	<7xis5cq5bj.fsf@ruckus.brouhaha.com>
Message-ID: <41FF5E42.9050602@swiftdsl.com.au>

Paul Rubin wrote:
> Philippe Fremy <phil at freehackers.org> writes:
> 
>>I would like to develop a tool that goes one step further than
>>pychecker to ensure python program validity. The idea would be to get
>>close to what people get on ocaml: a static verification of all types
>>of the program, without any kind of variable declaration. This would
>>definitely brings a lot of power to python.
> 
> 
> You know, I've always thought that ML-style type inference is an
> impressive technical feat, but why is it so important to not use
> declarations?  This is an aspect I've never really understood.

You know, I think I agree ;-). Just because you don't declare the types, 
doesn't mean you can change the implicit type willy nilly anyway; at 
least for more complex programs anyway. In fact, it would be safer to 
have type checking when you want to do something like this. I currently 
needed to change a number parameter to a string parameter (found out 
order_no wasn't just numbers as specs had specified). Of course this 
parameter was being used in a great many places. Changing it was a bit 
scary because we had to make sure it wasn't being treated as a number 
anywhere throughout the code. Yes good coverage with unit tests would 
have helped but unfortunately we do not yet have good coverage. TDD is a 
quite hard to practice as a beginner.

Cheers,

Huy


From saint_infidel at hotmail.com  Wed Feb 16 13:46:03 2005
From: saint_infidel at hotmail.com (infidel)
Date: 16 Feb 2005 10:46:03 -0800
Subject: Win32api shellexecute Bshow
In-Reply-To: <1108572241.817012.219940@z14g2000cwz.googlegroups.com>
References: <1108572241.817012.219940@z14g2000cwz.googlegroups.com>
Message-ID: <1108579563.115168.170120@f14g2000cwb.googlegroups.com>

Acrobat is stupid like this.  I haven't yet found a way to prevent it
from launching a new window, so I gave up and went with GhostScript and
GSPrint instead.  Works fabulously.



From aleaxit at yahoo.com  Tue Feb  8 05:49:58 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Tue, 8 Feb 2005 11:49:58 +0100
Subject: how to convert 4 bytes into a float ?
References: <cua4gu$pf7$1@s1.news.oleane.net>
Message-ID: <1grny4s.18evsxl1g1c7eaN%aleaxit@yahoo.com>

Jean-Baptiste PERIN <jb_perin at yahoo.fr> wrote:

> I read 4 bytes from a binary file.
> 
> These bytes represent a floating point number (mantisse exponent form)
> 
> How can I get a float from these bytes ?

See the docs for module struct, specifically the struct.unpack function,
if the float is in the binary format your machine expects (or possibly
that but with the wrong endianity).  If the float's binary format is
different from what your machine uses, you're in for a lot of painful
bit-twiddling.


Alex


From steven.bethard at gmail.com  Sat Feb 12 18:37:11 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 12 Feb 2005 16:37:11 -0700
Subject: check if object is number
In-Reply-To: <mailman.2456.1108249466.22381.python-list@python.org>
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com>	<374t0mF4te5vbU1@individual.net>	<7tOdnYs6NtrV7JDfRVn-vQ@powergate.ca>	<mLKdnbj4O4gQH5DfRVn-iA@comcast.com>
	<mailman.2456.1108249466.22381.python-list@python.org>
Message-ID: <tKidnT6fyKm_DpPfRVn-pA@comcast.com>

Michael Spencer wrote:
> Steven Bethard wrote:
> 
>> Peter Hansen wrote:
>>
>>> Of course, most of the other definitions of "is a number" that
>>> have been posted may likewise fail (defined as not doing what the
>>> OP would have wanted, in this case) with a numarray arange.
> 
> How about explicitly calling an adapter in your function, e.g.?

Yup, that's basically what I'm doing right now.  The question was really 
how to define that adapter function. =)

Steve


From db3l at fitlinxx.com  Wed Feb  9 13:48:10 2005
From: db3l at fitlinxx.com (David Bolen)
Date: 09 Feb 2005 13:48:10 -0500
Subject: win32 service and sockets
References: <200502081641.37483.brown@esteem.com>
	<mailman.2257.1107969537.22381.python-list@python.org>
Message-ID: <uy8dxin85.fsf@fitlinxx.com>

Tom Brown <brown at esteem.com> writes:

> Well, I have found that it works if I launch the client on the same
> machine as the service. It will not work from a remote machine. Any
> ideas?

Sounds like it might be an issue at the network layer rather than in
your code - perhaps a routing or filtering problem between your two
machines.  Have you verified that you do in fact have network
connectivity between the machines (such as with ping), and that you
can reach your server's port from the client (perhaps try telnetting
to the port).

Since you mentioned Xp, could any of it's built-in firewall support be
enabled, and perhaps blocking access to your server's port?

-- David


From dbickett at gmail.com  Fri Feb  4 16:44:48 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Fri, 4 Feb 2005 16:44:48 -0500
Subject: returning True, False or None
In-Reply-To: <raRMd.9382$s16.4267@trndny02>
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com> <raRMd.9382$s16.4267@trndny02>
Message-ID: <1d6cdae305020413444225d87@mail.gmail.com>

I'm seeing a consistent problem in most of these approaches.
Verbalized, the logic of the OP's original code reads as such:

If True is in the list *at all*, return True.
Otherwise, if False is in the list *at all*, return False.
Otherwise, return None.

So if we used Alex Martelli's code:

> for val in lst:
>    if val is not None:
>        return val
> return None

and the list was:

[ False , False , True , None ]

False would be returned upon inspection of the first index, even
though True was in fact in the list. The same is true of the code of
Jeremy Bowers, Steve Juranich, and Jeff Shannon. As for Raymond
Hettinger, I can't even be sure ;)

The original OP's code, on the other hand, inadvertently searches
through the list twice where once would have sufficed, causing a
needless performance pitfall. The following applies the OP's initial
logic while only iterating once:

>>> def boolhunt( items ):
	falseExists = False
	for item in items:
		if item is True:
			return True
		elif item is False and not falseExists:
			falseExists = True
	if falseExists:
		return False
>>> l1 = [ True , None , None , False ]
>>> l2 = [ None , False , False , None ]
>>> l3 = [ False , True , True , True ]
>>> boolhunt( l1 )
True
>>> boolhunt( l2 )
False
>>> boolhunt( l3 )
True

It isn't elegant or clever, but it gets the job done :)

-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From rbt at athop1.ath.vt.edu  Tue Feb 15 11:45:14 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Tue, 15 Feb 2005 11:45:14 -0500
Subject: os.walk() usage
Message-ID: <cut8ur$3v6$1@solaris.cc.vt.edu>

I'm trying to write very small, modular code as functions to break up a 
big monolithic script that does a file system search for particular 
strings. The script works well, but it's not easy to maintain or add 
features to.

I'd like to have a function that builds a list of files with os.walk() 
and then have other functions accept that list as a parameter and modify 
it as needed. For example, if the user has specified that certain files 
and folders be excluded from the walk, I'd like to have functions like this:

def build_list(path):
     fs_list = os.walk(path)
     return fs_list

def skip_files(fs_list):
     remove files
     return fs_list

def skip_dirs(fs_list):
     remove dirs
     return fs_list

def search(fs_list):
     pass

The problem I'm encountering is passing the list to other functions. 
It's almost as if each function needs to build the list itself (walk the 
filesystem)... which gets in the way of what I was asked to do (break 
this thing up into modular, maintainable pieces).

Any tips on this?

Thanks


From adam at eden.com  Thu Feb 17 19:00:19 2005
From: adam at eden.com (Adam)
Date: Fri, 18 Feb 2005 00:00:19 GMT
Subject: Font size
References: <42126822@news.comindico.com.au><ldzqyx6byqdw$.wt8smryc0t3.dlg@40tude.net><42129ea1@news.comindico.com.au><4213e033$1@news.comindico.com.au>
	<mailman.2740.1108626296.22381.python-list@python.org>
Message-ID: <42153012@news.comindico.com.au>


"Fredrik Lundh" <fredrik at pythonware.com> wrote in message 
news:mailman.2740.1108626296.22381.python-list at python.org...
> "Adam" <adam at eden.com> wrote:
>
>> So we came up with the idea of using a random  number generator to
>> generate numbers from 0 to 36 and display them in large figures on my
>> laptop. This is for the benefit of those people who are hard of hearing.
>> They like to see what is happening.
>
> here's one way to do this:
>
> from Tkinter import *
> from random import randint
> from time import sleep
>
> def update(event=None):
>  for i in range(10):
>    label.config(text=str(randint(0,36)))
>    label.update()
>    sleep(0.05)
>
> # create a maximized window
> root = Tk()
> root.wm_state("zoomed")
> root.title("my roulette wheel")
>
> # 80% of the screen height
> height = int(root.winfo_screenheight() * 0.8)
>
> # create label (use negative font size for size in pixels)
> label = Label(root, font="Arial " + str(-height), bg="gold")
> label.pack(fill=BOTH, expand=1)
>
> # click anywhere in window to pick a new number
> root.bind("<Button-1>", update)
>
> update() # display first number
>
> mainloop()
>
> (tweak as necessary)
>
> </F>
>
>
I thank all of you.
I will try each one of these suggestions.
Adam. 




From steven at lczmsoft.com  Mon Feb 28 03:35:39 2005
From: steven at lczmsoft.com (steven at lczmsoft.com)
Date: 28 Feb 2005 00:35:39 -0800
Subject: Problem When Unit Testing with PMock
In-Reply-To: <mailman.3122.1109540262.22381.python-list@python.org>
References: <1109423274.660110.156140@f14g2000cwb.googlegroups.com>
	<1109483520.813509.171880@f14g2000cwb.googlegroups.com>
	<mailman.3122.1109540262.22381.python-list@python.org>
Message-ID: <1109579739.175344.105600@z14g2000cwz.googlegroups.com>

Peter,

for a object foo who need a iterator to do a job,  i write test to make
sure the foo correctlly used the iterator, so a simple empty iterator
is not enough.  because in the case, i need to see if or not the foo
called the iterator to get the proper data from it and do the proper
translating on them.  so, the mock iterator i need should be such an
iterator which can returns be iterated out a lot of test data as i
willed.

i guess you are not familar with unit testing.  we need mock objects
not because they are hard to implemented, we need them to make the
tests easy and fine.

-
narke



From jdadson at yahoo.com  Wed Feb  9 18:09:46 2005
From: jdadson at yahoo.com (Jive Dadson)
Date: Wed, 09 Feb 2005 23:09:46 GMT
Subject: negative integer division
References: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
	<42096EAD.879E8A5F@yahoo.com> <86wtti76cp.fsf@guru.mired.org>
	<420A916C.94F7F175@yahoo.com> <420a9513$0$29477$a1866201@visi.com>
	<420A98C7.103157A@yahoo.com>
Message-ID: <420A98FA.F3EBF237@yahoo.com>

intentionally


From akineko at pacbell.net  Thu Feb  3 03:29:34 2005
From: akineko at pacbell.net (Aki Niimura)
Date: 3 Feb 2005 00:29:34 -0800
Subject: SysV IPC message queues
Message-ID: <1107419374.385346.131940@f14g2000cwb.googlegroups.com>

Hello everyone.

I'm trying to control a program from a Python program using IPC.
Although using a socket is a common choice for such applications, I
would like
to use SysV message queues because I don't need to parse the stream.

I thought Python had a support of SysV message queues (I have found
almost
anything I need in Python library modules so far).
But Python library seems not supporting SysV message queues yet.

I'm thinking of calling a C function from Python but it seems not so
easy.

Is there any easy work around for this?
Any suggestions, any comments are highly appreciated.
Thanks in adavance.

Aki Niimura



From cam.ac.uk at mh391.invalid  Sun Feb 13 21:36:59 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Mon, 14 Feb 2005 02:36:59 +0000
Subject: For American numbers
In-Reply-To: <mailman.2504.1108344676.22381.python-list@python.org>
References: <420e7376$1@nntp0.pdx.net>	<gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>	<mailman.2474.1108266888.22381.python-list@python.org>	<86zmy85dig.fsf@guru.mired.org>
	<mailman.2504.1108344676.22381.python-list@python.org>
Message-ID: <cup2sf$svu$3@gemini.csx.cam.ac.uk>

Nick Coghlan wrote:

> My mistake - IEC, not ISO :)

For all intents and purposes an IEC standard should be as good as an
ISO one. They usually develop standards for different areas, or jointly
if it is an overlapping area (but ISO/IEC standards are usually referred
to as "ISO standards").
-- 
Michael Hoffman


From __peter__ at web.de  Mon Feb  7 13:13:47 2005
From: __peter__ at web.de (Peter Otten)
Date: Mon, 07 Feb 2005 19:13:47 +0100
Subject: "Collapsing" a list into a list of changes
References: <dvOMd.33656$EG1.19314@lakeread04>
	<mailman.2034.1107725421.22381.python-list@python.org>
	<cu7532$er8$01$1@news.t-online.com>
	<mailman.2093.1107799636.22381.python-list@python.org>
Message-ID: <cu8b4v$7ut$01$2@news.t-online.com>

Francis Girard wrote:

> Python documentation should say "There is no good use case for the reduce
> function in Python and we don't know why we bother you offering it."

Submit a patch :-)

Peter
 



From tundra at tundraware.com  Mon Feb 28 20:17:58 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 28 Feb 2005 20:17:58 EST
Subject: Validating A User/Password Pair + Getting Groups On Unix
Message-ID: <d7scf2-c222.ln1@eskimo.tundraware.com>

OK, I've Googled for this and cannot seem to quite find what I need.
So, I turn to the Gentle Geniuses here for help.  Here is what I
need to do from within a script:

Given a username and a password (plain text):

   1) Validate that the password is correct for that user *without actually logging in*.

   2) If the password is valid, return a list of all the groups the user belongs to.
      Otherwise, return some error string.

I seem to not be able to crack how to do 1.

I can do 2) by brute force - just parse through /etc/group - but this
misses the primary group a given user may belong to - and that requires
also scanning /etc/passwd and then looking up the corresponding primary
group in /etc/group.  Is there a better way?

TIA,
-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/



From henryho at NO__SPAMM_.telus.net  Tue Feb 15 00:09:08 2005
From: henryho at NO__SPAMM_.telus.net (fanbanlo)
Date: Tue, 15 Feb 2005 05:09:08 GMT
Subject: os.rename() doesn't work w/unicode??
Message-ID: <UtfQd.58964$L_3.26017@clgrps13>

C:\MP3\001.txt -> 0.txt
C:\MP3\01. ??? - ????(???).mp3 -> 1.mp3

Traceback (most recent call last):
   File 
"C:\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py", 
line 310, in RunScript
     exec codeObject in __main__.__dict__
   File "C:\MP3\!RenameNum.py", line 40, in ?
     renameFiles(os.path.dirname(sys.argv[0]))
   File "C:\MP3\!RenameNum.py", line 26, in renameFiles
     os.rename(os.path.join(path, filenames), new_filename)
OSError: [Errno 22] Invalid argument

-----

def renameFiles(folder):
     """
         The function called for each directory visited.
         We'll rename all the files in consecutive number except
         files with filename begins with '!'

     """

     file_num_counter = 0

     for path, dirs, files in os.walk(folder):
         for filenames in files:
             if filenames.startswith('!'):
                 print 'file: ' + filenames + ' is ignored!'
             else:
                 file_extension  = filenames.split('.')[-1]
                 new_filename = str(file_num_counter) + '.' \
		+ file_extension
                 file_num_counter += 1

                 print os.path.join(path, filenames), "->", new_filename
                 os.rename(os.path.join(path, filenames), new_filename)


From tolot at jupiter.solar-empire.de  Wed Feb  2 12:27:51 2005
From: tolot at jupiter.solar-empire.de (Marc Christiansen)
Date: Wed, 2 Feb 2005 18:27:51 +0100
Subject: test_socket.py failure
References: <ctinqv0c1a@news4.newsguy.com>
	<mailman.1630.1107173295.22381.python-list@python.org>
	<ctmpr3025eh@news2.newsguy.com>
	<mailman.1723.1107313414.22381.python-list@python.org>
	<ctqpak01igc@news4.newsguy.com>
Message-ID: <n5f7d2-aub.ln1@halut.solar-empire.de>

x2164 at mailcity.com wrote:
> Nick Coghlan <ncoghlan at iinet.net.au> wrote:
>> Hmm, when the second argument is omitted, the system call looks like:
>> 
>> getservbyname("daytime", NULL);
>> 
>> Based on "man getservbyname" on my Linux PC, that should give
>> the behaviour we 
>> want - any protocol will match.
>> 
>> However:
>> 
>> Linux 2.6.4-52-default (Suse 9.1)
>> Glibc 2.3.3
>> gcc   3.3.3
>> 
>> So it may be that your older platform doesn't have this
>> behaviour - I'd be very 
>> interested in what 'man getservbyname' has to say.
> 
>    Just took a look at the man page for getservbyname on this
>    system and it doesn't mention passing NULL as the second
>    argument.  The pertinents: ;-)
> 
>        Linux kernel 2.6.10
>        Glibc 2.2.5
>        gcc   2.95.3

Just to confuse the matter more, on my system the man page mentions
passing NULL as the second argument and it works. Alas:
SuSE 7.3
Kernel 2.4.29 (vanilla)
Glibc  2.2.4 (older than yours)
gcc    2.95.3

>    I'd say your probably right about there being a difference
>    in the behaviour of getservbyname between libc 2.2.5 and 
>    and libc-2.3.3 given the differences in man pages and 
>    observed return values. I'll try and compare the libcs'
>    getservbyname codes and let you know a little later in 
>    the day.
> 
>    I wonder if the developers wanted to tie the python source
>    code so closely to a glibc version and possibly gnu-libc
>    specific?

Perhaps SuSE did patch the glibc...

Saluton
  Marc


From jrlen97 at gmail.com  Sun Feb 13 12:18:42 2005
From: jrlen97 at gmail.com (Jan Rienyer Gadil)
Date: Mon, 14 Feb 2005 01:18:42 +0800
Subject: graphing
Message-ID: <c78fcbdc05021309186684d3a6@mail.gmail.com>

i'm currently using python 2.3(enthought edition) on win 2000/xp.
i'm using boa constructor on the GUI part and matplotlib 0.71 on
plotting the graph.

i am using an MDIParentFrame. one of the child frame (MDIChildFrame1)
will be used for
the table part. then another child frame (MDIChildFrame2) will be used
to show the
graph, how am i going to do this? will i just import the child frame
(say on MDIChildFrame2, import MDIChildFrame1)
containing the tables and then i'll be able to just get the data from
the table and use it to plot a graph?

how am i going to assign to a variable each input to the table? Should
I use array or list?
since the data will be coming from serial port, how would i save each
data on each read from serial port, should i just append to the list
or array on each serial read?

i'm a little lost since i'm a bit new to python.

also, how am i going to assign to a variable anything that a user
inputs to a wxTxtCtrl?

any help would greatly be appreciated. thanks and more power


From lkoski at sandisk.com  Tue Feb 22 04:08:06 2005
From: lkoski at sandisk.com (Liat Koski)
Date: Tue, 22 Feb 2005 01:08:06 -0800
Subject: pydoc documentation
Message-ID: <5A581EC513B13048BE69A41625506074591FF1@ilex1.sandisk.local>

Hellow all,

I need to use pydoc mosule in order to get documentation to programs i made
I can't find a good source explaning how to use this module
I work on linux OS but this documentation can be made also on my windows OS
If anyone knows how to use it, and maybe has some source code he wrote using this module,
I'll be glade to use this help

Thanks in advanced

Liat


From stephen.thorne at gmail.com  Thu Feb 10 02:10:57 2005
From: stephen.thorne at gmail.com (Stephen Thorne)
Date: Thu, 10 Feb 2005 17:10:57 +1000
Subject: That horrible regexp idiom
Message-ID: <3e8ca5c805020923107c36cd7f@mail.gmail.com>

Hi,

import re
foo_pattern = re.compile('foo')

'>>> m = foo_pattern.search(subject)
'>>> if m:
'>>>    pass
'>>> else:
'>>>    pass


We've all seen it before. Its a horrible idiom that you would achieve
in another language by doing:

if (m = foo_pattern.search(subject)) 
{ }
else
{ }

but it occured to me today, that it is possible to do it in python
without the extra line.
'
'>>> def xsearch(pattern, subject):
'>>>     yield pattern.search(subject)

'>>> for m in xsearch(foo_pattern, subject):
'>>>     pass
'>>> else:
'>>>     pass

simple, concise, requires no new syntax, and is only a little confusing[1]!

Just recording some thoughts I had. This still doesn't take care of
the horrors of chaining multiple regular expressions. The following is
still incredibly hideous.

'>>> for m in xsearch(foo_pattern, subject):
'>>>     pass
'>>> else:
'>>>     for m in xsearch(bar_pattern, subject):
'>>>         pass
'>>>     else:
'>>>         pass

Thankyou for your time.

Stephen Thorne

[1] Actual confusement may vary.


From news at grauer-online.de  Mon Feb  7 05:54:08 2005
From: news at grauer-online.de (Uwe Grauer)
Date: Mon, 07 Feb 2005 11:54:08 +0100
Subject: WYSIWYG wxPython "IDE"....?
In-Reply-To: <1107751731.066796.295170@g14g2000cwa.googlegroups.com>
References: <1107560658.584623.303310@o13g2000cwo.googlegroups.com>
	<4205fcd9@news.highway1.com.au>
	<1107751731.066796.295170@g14g2000cwa.googlegroups.com>
Message-ID: <cu7hcf$1ek$1@online.de>

Simon John wrote:
> Tim Hoffman wrote:
> 
>>Have you tried Boa Constructor ?
>>
>>http://boa-constructor.sourceforge.net/
> 
> 
> Yeah, I was never very impressed with it either. The current version
> doesn't seem to work with wxPython 2.5.3.1 though....
> 
> I guess there isn't a GUI builder that does what I want, back to the
> manual way of doing things I guess, unless I use Qt for this project
> maybe, and keep it to myself (due to the stupid Qt licensing).
> 

Most People don't realize, that they have to use the cvs-version
instead.
For wxPython 2.5.x there is no released version of boa.
Boa 0.4 is in the works now for 2.5.x.
For wxPython 2.4 please use Boa 0.31

Hope this helps,
	Uwe


From peter at engcorp.com  Sun Feb 13 20:39:10 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sun, 13 Feb 2005 20:39:10 -0500
Subject: SCons build tool speed
In-Reply-To: <1108309756.236396.201830@o13g2000cwo.googlegroups.com>
References: <SBsPd.4406$ZZ.3056@newssvr23.news.prodigy.net>
	<gOOdnTpZnaZCVJPfRVn-3w@powergate.ca>
	<1108309756.236396.201830@o13g2000cwo.googlegroups.com>
Message-ID: <v8KdnVGnB5AlnI3fRVn-sw@powergate.ca>

knight at baldmt.com wrote:
> You're right that build times are dominated by the external commands
> when rebuilds occur.  If nothing needs to be rebuilt, though, the
> wall-clock time is obviously dominated by how long it takes for
> the build tool to decide that.  A build tool that doesn't decide
> whether or not targets are up-to-date *and* dispatch the commnds
> to rebuild them reasonably quickly and efficiently doesn't do a
> good job of serving its users.

That answer, combined with Mike's response pointing out
that tools more sophisticated than basic "make" actually
can delve into the source and identify the dependencies,
removes my confusion.  Thanks. :)

-Peter


From apardon at forel.vub.ac.be  Wed Feb 16 10:32:55 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 16 Feb 2005 15:32:55 GMT
Subject: renaming 'references' to functions can give recursive problems
References: <1108565645.179340.70600@o13g2000cwo.googlegroups.com>
Message-ID: <slrnd16pt6.enl.apardon@rcpc42.vub.ac.be>

Op 2005-02-16, peter schreef <Peter.Vandersteegen at gmail.com>:
> Hello all,
>
> Recently I've started to refactor my code ...(I'm using python 2.3.4)
> I tried to add extra functionality to old functions non-intrusively.
> When I used a construct, which involves renaming functions etc... I
> came across some recursive problems.  (a basic construct can be found
> under the section BASIC CODE)
>
> These problems do not occur when renaming objects.  (see section EXTRA
> CODE)
> My question now is:
> I do not know the underlying idea of functions.  Is this the way they
> should behave? Or should they work the same way as objects do?
> (My preferences goes to this last option)
>
> BASIC CODE:
> ---------------------------------------------------------------------------
> def fA(input): # starting point: function named fA
>     return input
>
> def newFA(input): # new function with added functionality
>     #does something extra with a!
>     return fA(input)
> fA = newFA
>      # this should allow to add functionality without
>      # breaking older code which uses the name fA!
> fA() # execute fA()

Try this:

def fA(input):
  return input


def newFA(input, f= fA):
  return f(input)

fA = newFA

-- 
Antoon Pardon


From davecook at nowhere.net  Mon Feb 14 11:39:34 2005
From: davecook at nowhere.net (Dave Cook)
Date: Mon, 14 Feb 2005 16:39:34 GMT
Subject: FS: O'Reilly Python Pocket Reference
References: <1108360367.579794.122150@g14g2000cwa.googlegroups.com>
Message-ID: <slrnd11l26.b7a.davecook@localhost.localdomain>

On 2005-02-14, Christopher Culver <christopher_culver at yahoo.com> wrote:

> I am offering for sale a copy of O'Reilly's _Python Pocket Reference_.
> It is the second edition, covering Python 2. It is in fine condition,
> with no broken spine or dog-earned pages. One might even believe it
> just came out of the bookstore. Asking price is US$4 plus shipping

The 3rd edition is already out.  Why not give your old one to a friend.

Dave Cook


From peter at engcorp.com  Thu Feb  3 21:51:15 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 03 Feb 2005 21:51:15 -0500
Subject: Finding user's home dir
In-Reply-To: <s1pttc.1q11.ln@orion.homeinvalid>
References: <5i9rtc.rq31.ln@orion.homeinvalid>
	<mailman.1800.1107419518.22381.python-list@python.org>
	<s1pttc.1q11.ln@orion.homeinvalid>
Message-ID: <fYidnaYITLS-fp_fRVn-2w@powergate.ca>

Nemesis wrote:
> On my Win2000 box it returns "%USERPROFILE%". That's no surprise because
> if you look at the code it try to use os.environ["HOME"] (as
> os.path.expanduser() does). And on my Win2000 system this information
> points to "%USERPROFILE%" field (I don't know why, I'm not the
> administrator of that machine).

It looks a lot like somebody who didn't test things out
properly (the real administrator, not you), was trying
to do the equivalent of "set home=%userprofile%" but
managed to fail...  if you do that at the command line
or in a .CMD or .BAT file, it will expand the reference
out and you'd have a "HOME=C:\Documents and Settings\whatever"
just like you'd expect.

Probably they put that in a dialog box somewhere without
realizing it wouldn't be evaluated.  (At least, I don't
think environment variable substitution generally or
ever has "lazy evaluation" semantics...)

Now that I know how to do what Duncan described (thanks
Duncan!), either approach works for me.  Of course,
whether I'm a likely eventual user of your particular
program is an entirely different question. ;-)

-Peter


From jeff at ccvcorp.com  Fri Feb 11 15:07:34 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Fri, 11 Feb 2005 12:07:34 -0800
Subject: newbie question
In-Reply-To: <3hjo01h0845er5aln0dl4u37tlk4hcr7uo@4ax.com>
References: <1107990182.516041.120410@o13g2000cwo.googlegroups.com>
	<xfOdnUnRLYukB5ffRVn-tA@powergate.ca>
	<1107992130.921664.68860@z14g2000cwz.googlegroups.com>
	<110lgig2to6r139@corp.supernews.com>
	<t8vl01pgp5pfdjbu8ki9ovue8ud2gk1q1k@4ax.com>
	<110n6qr9i7eg239@corp.supernews.com>
	<3hjo01h0845er5aln0dl4u37tlk4hcr7uo@4ax.com>
Message-ID: <110q41oaopgthbc@corp.supernews.com>

Dennis Lee Bieber wrote:
> On Thu, 10 Feb 2005 09:36:42 -0800, Jeff Shannon <jeff at ccvcorp.com>
> declaimed the following in comp.lang.python:
> 
>>And as Peter Hansen points out, none of the Python versions leave n in 
>>the same state that the C loop does, so that's one more way in which 
>>an exact translation is not really possible -- and (IMO again) further 
>>evidence that trying to do an exact translation would be 
>>ill-conceived.  Much better to consider the context in which the loop 
>>is used and do a looser, idiomatic translation.
> 
> 	Yeah, though my background tends to be one which considers loop
> indices to be loop-local, value indeterminate after exit...

Well, even though I've programmed mostly in langauges where loop 
indices to retain a determinate value after exit, I almost always 
*treat* them as loop-local -- it just seems safer that way.  But not 
everyone does so, and especially with C while loops, often the point 
is to keep adjusting the control variable until it fits the 
requirements of the next section...

Jeff Shannon
Technician/Programmer
Credit International



From martin at v.loewis.de  Tue Feb  8 16:03:55 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 08 Feb 2005 22:03:55 +0100
Subject: python-2.4.msi installation issue
In-Reply-To: <1107412984.087664.308590@o13g2000cwo.googlegroups.com>
References: <1107412984.087664.308590@o13g2000cwo.googlegroups.com>
Message-ID: <42092925$0$1537$9b622d9e@news.freenet.de>

mirandacascade at yahoo.com wrote:
> My question is this: how do I determine what the error was that caused
> the installation process to end prematurely?

Please run

msiexec /i python-2.4.msi /l*v python.log

and post the resulting python.log as a bug report on
sf.net/projects/python.

In most such cases, upgrading VisualBasic helped, see

http://www.python.org/2.4/bugs.html

Regards,
Martin


From jtp11 at att.net  Thu Feb 10 07:54:46 2005
From: jtp11 at att.net (Jim)
Date: 10 Feb 2005 04:54:46 -0800
Subject: Loop in list.
In-Reply-To: <cubifd$4a5$1@panix2.panix.com>
References: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
	<36s2b2F53f67pU1@individual.net>
	<1107890995.922231.193960@g14g2000cwa.googlegroups.com>
	<cubifd$4a5$1@panix2.panix.com>
Message-ID: <1108040086.198490.197630@c13g2000cwb.googlegroups.com>

I did appreciate the reference.  I started with Fortran
on an IBM (7040 maybe, not sure) using keypunched cards.  Some of the
concepts of the newer languages take some to seem useable.

Jim



From grante at visi.com  Tue Feb  1 22:32:56 2005
From: grante at visi.com (Grant Edwards)
Date: 02 Feb 2005 03:32:56 GMT
Subject: getting data from a port in use
References: <mailman.1729.1107314596.22381.python-list@python.org>
Message-ID: <420049e8$0$20020$a1866201@visi.com>

On 2005-02-02, Dana Marcusanu <dmarcusanu at yahoo.com> wrote:

> Yes. It hangs at accept. I always end up doing end task
> because it never passes the "accept" statement.

And you're sure that somebody tries to initiate a connection
after your program has gotten to the accept() line? 

> When I set the port I use netstat (netstat -bn) to get the
> ports that are in use.

What do you mean by  a port being "in use"?  Is there another
program already waiting for a connection on the port?  You keep
repeating the bit about "ports in use", but that phrase is too
vague.  Do you mean there is already an established connection
that uses that port?  If that's what you mean, it doesn't
matter one way or another.  What matters is whether there's
another program already bound to that port and listening for
new connections.

As I've already said: if you're trying to get data from already
established connections, you can't do it using accept.  You
have to use the pcap library.

You're going to have to accurately describe what you're trying
to do, or none of us are going to be able to help you.

-- 
Grant Edwards                   grante             Yow!  HERE!! Put THIS
                                  at               on!! I'm in CHARGE!!
                               visi.com            


From mahs at telcopartners.com  Wed Feb 16 12:49:15 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 16 Feb 2005 09:49:15 -0800
Subject: renaming 'references' to functions can give recursive problems
In-Reply-To: <1108573114.574794.201470@g14g2000cwa.googlegroups.com>
References: <1108565645.179340.70600@o13g2000cwo.googlegroups.com>	<slrnd16pt6.enl.apardon@rcpc42.vub.ac.be>
	<1108573114.574794.201470@g14g2000cwa.googlegroups.com>
Message-ID: <cv00th$2qn$1@sea.gmane.org>

peter wrote:
> Hello, nice solution:
> but it puzzles me :)
> 
> can anyone tell me why
> -----------correct solution----------------
> def fA(input):
>   return input
> 
> def newFA(input, f= fA):
>    return f(input)
> 
> fA = newFA
> 
> is correct and:
> -------------infinite loop-----------------
> 
> def fA(input):
>   return input
> 
> def newFA(input):
>    return fA(input)

In newFA, fA is not bound until you call newFA.  By which time you've re-bound 
fA to newFA, causing the recursion.  In the 'correct' solution above, f is bound 
to the original fA function at the time the def fA statement is executed, which 
is what you want.

> 
> fA = newFA
> 
> gives an infinite recursive loop?
> 
> kind regards
> 
> Peter

Regards
Michael



From devries at idolstarastronomer.com  Tue Feb  1 11:12:33 2005
From: devries at idolstarastronomer.com (Christopher De Vries)
Date: Tue, 1 Feb 2005 11:12:33 -0500
Subject: Microsoft Visual C++ and pyton
In-Reply-To: <1107211331.830565.238150@c13g2000cwb.googlegroups.com>
References: <1107126726.533325.104300@z14g2000cwz.googlegroups.com>
	<mailman.1646.1107188808.22381.python-list@python.org>
	<1107211331.830565.238150@c13g2000cwb.googlegroups.com>
Message-ID: <20050201161233.GA23022@miyu.cjas.org>

On Mon, Jan 31, 2005 at 02:42:11PM -0800, mike wrote:
> I was also advised to build the python core (pythoncore.vcproj) with my
> C++ program. By that way I would not have to load the python core
> anymore during runtime. Is this a good approach?
> I am currently using VC++ 7 and python 2.4.

I'm not sure... I'm not very familiar with PC builds.

Chris


From lkirsh at cs.ubc.ca  Tue Feb  1 03:23:13 2005
From: lkirsh at cs.ubc.ca (Lowell Kirsh)
Date: Tue, 01 Feb 2005 00:23:13 -0800
Subject: how do i create such a thing?
In-Reply-To: <1gr9b2q.1dlgnok1ayt2zsN%aleaxit@yahoo.com>
References: <ctjl2u$2sc$1@mughi.cs.ubc.ca>
	<mailman.1605.1107124128.22381.python-list@python.org>
	<7vGdnTsopcKl-GDcRVn-rw@comcast.com>
	<1gr9b2q.1dlgnok1ayt2zsN%aleaxit@yahoo.com>
Message-ID: <ctne9j$9jm$1@mughi.cs.ubc.ca>

What might these exceptions be?

> It's HIGHLY advisable to have your __getattr__ methods raise
> AttributeError for any requested name that starts and ends with double
> underscores, possibly with some specific and specifically designed
> exceptions.
> 
> 
> Alex


From ne-nospam7 at post.cybercity.dk  Wed Feb 23 13:01:59 2005
From: ne-nospam7 at post.cybercity.dk (Nils Emil P. Larsen)
Date: Wed, 23 Feb 2005 19:01:59 +0100
Subject: Comm. between Python and PHP
References: <lnsm11d91ug2gfh5gjvutga4dthhg0rjbf@4ax.com>
	<nfWdnY2gUtSY5IbfRVn-tw@powergate.ca>
	<slrnd1n5s6.rsd.nick@irishsea.home.craig-wood.com>
Message-ID: <oufp115r6cuk3qh3slplldpf8982tanrie@4ax.com>

Hello

Sorry for not being too exact in my request!

>If the data you want to pass is structured then you might consider
>XML-RPC which is a cross platform way of passing structured data

XML-RPC looks like something very suitable for my needs. It seems
Python handles the remote procedure calls very easily (almost like
local functions).
It also works quite well in PHP. I didn't recompile anything but
downloaded Keith Devens XML-RPC Library (500 lines code). With this I
can call RPC-functions almost as easily as with Python. It took me
just about an hour to get it working...

Thanks everybody!

Nils Emil P. Larsen


--
My reply-address is valid.           www.bios-flash.dk
Min svar-adresse er gyldig.      Redning af d?de BIOS'er


From simon.brunning at gmail.com  Tue Feb 15 07:39:10 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Tue, 15 Feb 2005 12:39:10 +0000
Subject: Variables.
In-Reply-To: <614c778e.0502150429.1a2a4d8d@posting.google.com>
References: <614c778e.0502150429.1a2a4d8d@posting.google.com>
Message-ID: <8c7f10c6050215043914538595@mail.gmail.com>

On Tue, 15 Feb 2005 04:30:30 -0800 (PST), administrata
<administrata at hotmail.com> wrote:
> I wrote this, It's a bit lame though
> 
> I = "Allen"
> me = "Allen"
> my = "Allen's"
> 
> print \
> """
> %s woke up early in the morning. But, it was unusal by %s. %s pillow
> was with %s. %s didn't want to wake up But, %s tried my best and woke up.
> it was so amazing!""" % (I,me,my,me,I,I)

One thing that you might want to do is to use a dictionary to provide
the values, like so:

my_values = {"I": "Simon", "me": "Simon", "my": "Simon's"}

print """%(I)s woke up early in the morning. But, it was unusal by
%(me)s. %(my)s pillow
was with %(me)s. %(I)s didn't want to wake up But, %(I)s tried my best
and woke up.
It was so amazing!""" % my_values

> raw_input("\n\\t\t\t- The End -")
> 
> But it looks like this...
> 
> Allen woke up early in the morning. But, it was unusal by Allen.
> Allen's pillow
> was with Allen. Allen didn't want to wake up But, Allen tried my best and woke up.
> it was so amazing
> 
>                             - The End -

What did you *expect* it to do?

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From joakim.storck at home.se  Wed Feb  2 11:57:29 2005
From: joakim.storck at home.se (Joakim Storck)
Date: 2 Feb 2005 08:57:29 -0800
Subject: Hash of class from instance
Message-ID: <1107363449.476446.13100@f14g2000cwb.googlegroups.com>

Hello,

Is there any way that I can find the hash value of a class from an
instance?

>>> class A:
... 	pass
...
>>> a = A()
>>> hash(A)
10782976
>>> hash(a)
12251904
>>>

What I want is a function that returns the value of 'hash(A)':
> a.getHashOfClass()
10782976

Is this possible?

/Joakim



From jack at performancedrivers.com  Fri Feb  4 19:12:55 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Fri, 4 Feb 2005 19:12:55 -0500
Subject: Persistence design [was: RE: OT: why are LAMP sites slow?]
In-Reply-To: <864d370905020415095e876649@mail.gmail.com>
References: <3A81C87DC164034AA4E2DDFE11D258E3398367@exchange.hqamor.amorhq.net>
	<20050204224644.GG1607@performancedrivers.com>
	<864d370905020415095e876649@mail.gmail.com>
Message-ID: <20050205001255.GH1607@performancedrivers.com>

On Fri, Feb 04, 2005 at 09:09:46PM -0200, Carlos Ribeiro wrote:
> On Fri, 4 Feb 2005 17:46:44 -0500, Jack Diederich <jackdied at jackdied.com> wrote:
> > On Fri, Feb 04, 2005 at 10:31:19AM -0800, Robert Brewer wrote:
> > > Jack Diederich wrote:
> > > > If there is interest I'll follow up with some details on my own LAMP
> > > > software which does live reports on gigs of data and - you
> > > > guessed it -
> > > > I regret it is database backed.  That story also involves why
> > > > I started
> > > > using Python (the prototype was in PHP).
> > >
> > > I'd be interested, if only selfishly to hear more potential use cases
> > > for *my* projects. ;)
> > 
> > It would be long so I'll spin it into a blog piece.  They seem to be
> > all the rage these days *0.5 wink*
> 
> A blog piece of yours truly :-) (call it a blatant plug if you want)
> 
> http://pythonnotes.blogspot.com/2004/11/alternative-database-systems.html
<snip, see there for a "see also" URL comment I dropped>
> 
> I'm (slowly) designing a personal CMS that is intended to use
> Subversion as its backend, for both blog & wiki style entries. It's
> filesystem based, fast (the website can use the working copy for
> nearly everything) and allows for versioning - something that its
> difficult to implement properly with low-end RDBMSs. It looks
> promising :-)

If you are on linux you can mount SVN repositories as filesystems.
It only displays the most recent version of a file (and requires the
alpha version of Apache) but that would be a fine and simple way to
have Apache serve versioned things.  Any time an article is edited or
added just write the file and Apache will serve it as static, blissfully
unaware the older versions exist.  Later when you add functionality to 
diff entries access the same repository with subversion tools.

-Jack


From daniel_usenet at yahoo.de  Sun Feb 20 17:53:41 2005
From: daniel_usenet at yahoo.de (Daniel Lichtenberger)
Date: Sun, 20 Feb 2005 23:53:41 +0100
Subject: questions concerning cgi.FieldStorage(keep_blank_values=1)
In-Reply-To: <mailman.2867.1108920086.22381.python-list@python.org>
References: <mailman.2865.1108917022.22381.python-list@python.org>	<37rtmjF5gk5l2U1@individual.net>
	<mailman.2867.1108920086.22381.python-list@python.org>
Message-ID: <37sinmF5fa2vpU1@individual.net>

Jonas Meurer wrote:
>>"key1" isn't a valid parameter, to supply an empty key you would write
>>script.py?key1=&key2=foo
>>
>>Then cgi.FieldStorage also includes key1.
> 
> great, it works. but is there no way to use single keywords as GET
> argument?

You could manually parse the request string (CGI stores the request 
string as an environment variable, you can retrieve it via 
os.environ["REQUEST_STRING"]), but why not add "=1" (or "=") to your 
keywords?

bye,
Daniel

-- 
http://perplex.schmumpf.de/
[visit for regular email address]


From zerok at zerokspot.com  Wed Feb 23 05:01:15 2005
From: zerok at zerokspot.com (Horst Gutmann)
Date: Wed, 23 Feb 2005 11:01:15 +0100
Subject: Problem with minidom and special chars in HTML
In-Reply-To: <cvg555$d3a$1@atlantis.news.tpi.pl>
References: <421b5b8c$1@news.uni-klu.ac.at> <cvg555$d3a$1@atlantis.news.tpi.pl>
Message-ID: <421c541c$1@news.uni-klu.ac.at>

Jarek Zgoda wrote:
> Horst Gutmann napisa?(a):
> 
>> I currently have quite a big problem with minidom and special chars 
>> (for example &uuml;)  in HTML.
>>
>> Let's say I have following input file:
>> --------------------------------------------------
>> <?xml version="1.0"?>
>> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
>>             "http://www.w3.org/TR/html4/strict.dtd">
> 
> 
> HTML4 is not an XML application. Even if minidom will fetch this DTD and 
> be able to parse character entities, it may not be able to parse the 
> document.
> 
>> Any idea how I could solve this problem?
> 
> 
> Don't use minidom or convert HTML4 to XHTML and change declaration of 
> doctype.
> 
This was just a bad example :-) I get the same problem with XHTML in the 
doctype. The funny thing here IMO is, that the special chars are simply 
removed. No warning, no nothing :-(

MfG, Horst


From lists04 at gmail.com  Tue Feb  1 20:48:53 2005
From: lists04 at gmail.com (lists04 at gmail.com)
Date: 1 Feb 2005 17:48:53 -0800
Subject: curl and popen2
Message-ID: <1107308933.196121.8330@l41g2000cwc.googlegroups.com>

Hi,

I have a problem with a curl request and running it under popen2.

If I run this request from the command line:
curl -i http://www.yahoo.com/test --stderr errfile
(also tried redirecting stdderr to a file 2>, nothing) the file errfile
is empty indicating no error with the request.

However, when I do something similar in python:
>>> cmd="curl -i http://www.yahoo.com/test"
>>> output, input, err = popen2.popen3(cmd)
>>> error = err.readlines()
>>> error
['  % Total    % Received % Xferd  Average Speed          Time
Curr.\n', '                                 Dload  Upload Total
Current  Left    Speed\n', '\r100   981    0   981    0     0  24525
0 --:--:--  0:00:00 --:--:-- 24525\r100  2484    0  2484    0     0
62100      0 --:--:--  0:00:00 --:--:-- 1467k\n']

I looked in the man page for curl, it doesnt say that it writes some
bandwidth statistics to stderr. Am I missing something or is this
better directed to some other newsgroup? 

TIA

Hari



From lbates at syscononline.com  Wed Feb  2 11:08:38 2005
From: lbates at syscononline.com (Larry Bates)
Date: Wed, 02 Feb 2005 10:08:38 -0600
Subject: CONTEST - What is the (best) solution?
In-Reply-To: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
References: <1107340503.462196.109440@o13g2000cwo.googlegroups.com>
Message-ID: <qY-dneb-0f5iZ53fRVn-vw@comcast.com>

Assumptions:
1) You actually meant to have commas between each key value pair
(which your example DOES NOT have).

2) File can be read into memory

3) All the key and value variables are actually defined in the
local namespace or they are literal values instead of references
to variables.

This works:

Key11=11
Value11='V11'
Key12=12
Value12='12'
Key13=13
Value13='V13'
Key21=21
Value21='V21'
Key22=22
Value22='V22'
Key23=32
Value23='V23'
Key31=31
Value31='V31'
Key32=32
Value32='V32'
Key33=33
Value33='V33'

testdata='''
{Key11: Value11,\n
Key12: Value12,\n
Key13: Value13}\n
{Key21: Value21,\n
Key22: Value22,
Key23: Value23}\n
{Key31: Value31,\n
Key32: Value32,\n
Key33: Value33}\n
'''
#
# Or read data from a file
#
# f=open(file, 'r')
# testdata=f.read()
# f.close()
#
dictlist=testdata.replace('\n','').split('{')
firstdictstr='{'+dictlist[2]
lastdictstr='{'+dictlist[-1]

firstdict=eval(firstdictstr)
lastdict=eval(lastdictstr)

print "firstdict=", firstdict
print "lastdict=", lastdict
firstdict=eval(firstdictstr)
lastdict=eval(lastdictstr)

Larry Bates


python at hope.cz wrote:
> In a file there can be several dictionaries like this
> {Key11: Value11
> Key12: Value12
> Key13: Value13,
> ...
> ...
> Key1n:Value1n}
> {Key21: Value21
> Key22: Value22
> Key23: Value23,
> ...
> ...
> Key2n:Value2n}
> {Key31: Value31
> Key32: Value32
> Key33: Value33,
> ...
> ...
> Key3n:Value3n}
> ....
> ....
> ....
> {Keyn1: Valuen1
> Keyn2: Valuen2
> Keyn3: Value3,
> ...
> ...
> Keynn:Valuenn}
> 
> Each pair in a dictionary is separated by CRLF and in each dictionary
> numbers of pairs can be different.
> I need to read only the the first and the last dictionaries.What is a
> best solution?
> Thanks
> Lad
> 


From mnations at gmail.com  Fri Feb  4 18:33:50 2005
From: mnations at gmail.com (Mudcat)
Date: 4 Feb 2005 15:33:50 -0800
Subject: How do I enter/receive webpage information?
Message-ID: <1107560030.834943.174250@f14g2000cwb.googlegroups.com>

Hi,

I'm wondering the best way to do the following.

I would like to use a map webpage (like yahoo maps) to find the
distance between two places that are pulled in from a text file. I want
to accomplish this without displaying the browser.

I am looking at several options right now, including urllib, httplib,
packet trace, etc. But I don't know where to start with it or if there
are existing tools that I could incorporate.

Can someone explain how to do this or point me in the right direction?

Thanks,
Marc



From calvin at ironfroggy.com  Mon Feb 28 11:17:47 2005
From: calvin at ironfroggy.com (Calvin Spealman)
Date: Mon, 28 Feb 2005 16:17:47 +0000
Subject: ZoDB's capabilities
References: <d00640$1o6o$1@news.vol.cz>
Message-ID: <3254850.IxBZvmgANK@ironfroggy.com>

I don't think you have anything to worry about. Consider that this is
exactly what ZODB was designed for. It is, after all, the database back-end
for Zope itself, which is just another (very good, some say) CMS.

Almad wrote:

> Hello,
> 
> I'm going to write a custom CMS. I'd like to use some odbms, as code is
> then much more cleaner...however, i'm a little bit scared about
> capabilities of ZoDB, when compared with f. e. Firebird.
> How much instances is Zodb able to handle? Under "handle" I mean "in real
> time", not "theoretically". I'd like to use it for dynamic portal with
> about 2000 - 3000 UIP / day.
> 
> And, how is it with stability and crash recovery? I can't find some more
> sources about zodb, when there are some other sources then those on Zope,
> please tell me. Or, please tell me if you knew some better odbms engine
> ^_^
> 
> Thanks,

-- 
 



From rnd at onego.ru  Wed Feb  9 15:17:31 2005
From: rnd at onego.ru (Roman Suzi)
Date: Wed, 9 Feb 2005 23:17:31 +0300 (MSK)
Subject: Is email package thread safe? (fwd)
In-Reply-To: <slrnd0k9jt.26q.apardon@rcpc42.vub.ac.be>
References: <mailman.2245.1107959519.22381.python-list@python.org>
	<slrnd0k9jt.26q.apardon@rcpc42.vub.ac.be>
Message-ID: <Pine.LNX.4.62.0502092314460.17908@rnd.onego.ru>

On Wed, 9 Feb 2005, Antoon Pardon wrote:

> Op 2005-02-09, Roman Suzi schreef <rnd at onego.ru>:
>>
>> Just to be sure, is email package of Python 2.3 thread-safe or not
>> (to use, for example, in python-milter?)

>> Can I assume that everything
>> else without such notice is thread-safe?
>
> I doubt it. There is no indication that the email package uses any
> kind of locking. So multiple thread working on the same message
> will probably screw things up.

Of course, I do not let threads to work on the same message!
I meant that the package doesn't pose other kinds of restrictions.
Can it work in _any_ situation work on two different messages at the same 
time, without any interference?


Sincerely yours, Roman Suzi
-- 
rnd at onego.ru =\= My AI powered by GNU/Linux RedHat 7.3


From thomas at thomas-lotze.de  Tue Feb 15 04:01:30 2005
From: thomas at thomas-lotze.de (Thomas Lotze)
Date: Tue, 15 Feb 2005 10:01:30 +0100
Subject: Copying data between file-like objects
Message-ID: <pan.2005.02.15.09.01.29.555879@ID-174572.user.uni-berlin.de>

Hi,

another question: What's the most efficient way of copying data between
two file-like objects?

f1.write(f2.read()) doesn't seem to me as efficient as it might be, as a
string containing all the contents of f2 will be created and thrown away.
In the case of two StringIO objects, this means there's a point when the
contents is held in memory three times.

Reading and writing a series of short blocks to avoid a large copy buffer
seems ugly to me, and string objects will be created and thrown away all
the time. Do I have to live with that?

(In C, I would do the same thing, only without having to create and throw
away anything while overwriting a copy buffer, and being used to doing
everything the pedestrian way, anyway.)

-- 
Thomas




From phd at mail2.phd.pp.ru  Mon Feb 14 11:15:44 2005
From: phd at mail2.phd.pp.ru (Oleg Broytmann)
Date: Mon, 14 Feb 2005 19:15:44 +0300
Subject: mxCGIPython binaries for Python 2.3.5
In-Reply-To: <20050214080603.1181621450.EP@zomething.com>
References: <20050211154457.GA23787@phd.pp.ru>
	<20050211181320.GA23241@caltech.edu>
	<20050211183904.GA28714@phd.pp.ru>
	<20050214080603.1181621450.EP@zomething.com>
Message-ID: <20050214161543.GB30604@phd.pp.ru>

On Mon, Feb 14, 2005 at 08:06:03AM -0800, EP wrote:
> I'm unschooled in non-Windows binaries.  Does this mean it may be
> possible to download this package onto a (for example) SunOS system,
> unpack and have Python up and running?  That would be sweet...

   Almost. You also need *.py from the standard Python library.

   Read http://www.egenix.com/files/python/mxCGIPython.html for
the installation instructions.

> [frustrated trying to compile Python on a system I do not own...]

   Why? I did it many times installing binaries into my homedir.

Oleg.
-- 
     Oleg Broytmann            http://phd.pp.ru/            phd at phd.pp.ru
           Programmers don't die, they just GOSUB without RETURN.


From lkirsh at cs.ubc.ca  Tue Feb 22 03:34:39 2005
From: lkirsh at cs.ubc.ca (Lowell Kirsh)
Date: Tue, 22 Feb 2005 00:34:39 -0800
Subject: how can I make this script shorter?
Message-ID: <cveqr1$a47$1@mughi.cs.ubc.ca>

I have a script which I use to find all duplicates of files within a 
given directory and all its subdirectories. It seems like it's longer 
than it needs to be but I can't figure out how to shorten it. Perhaps 
there are some python features or libraries I'm not taking advantage of.

The way it works is that it puts references to all the files in a 
dictionary with file size being the key. The dictionary can hold 
multiple values per key. Then it looks at each key and all the 
associated files (which are the same size). Then it uses filecmp to see 
if they are actually byte-for-byte copies.

It's not 100% complete but it's pretty close.

Lowell
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From aahz at pythoncraft.com  Mon Feb  7 18:48:50 2005
From: aahz at pythoncraft.com (Aahz)
Date: Mon, 7 Feb 2005 18:48:50 -0500
Subject: BayPIGgies: January 13, 7:30pm
Message-ID: <20050207234850.GA28157@panix.com>

WARNING: the last meeting of BayPIGgies at Stanford is currently
scheduled for March.  Our host, Danny Yoo, is leaving Stanford, and we
need to find a new location.  If you wish to assist with the search,
please join the BayPIGgies mailing list.

Meanwhile, let's all give hearty thanks to Danny for helping us find a
stable meeting location for so long!


The next meeting of BayPIGgies will be Thurs, January 13 at 7:30pm.  

Donovan Preston will preview his PyCon presentation on developing GUI
applications with HTML and HTTP.  If you want to do a presentation in
March (also before PyCon!), please send e-mail to
baypiggies at baypiggies.net

BayPIGgies meetings are in Stanford, California.  For more information
and directions, see http://www.baypiggies.net/


Before the meeting, we may meet at 6pm for dinner in downtown Palo Alto.
Discussion of dinner plans is handled on the BayPIGgies mailing list.


Advance notice: The March 10 meeting agenda has not been set.  Please
send e-mail to baypiggies at baypiggies.net if you want to make a
presentation.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From beliavsky at aol.com  Sun Feb  6 16:45:28 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 6 Feb 2005 13:45:28 -0800
Subject: Python versus Perl ?
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
	<slrnd0cofg.rr5.jgrahn-nntq@frailea.sa.invalid>
Message-ID: <1107726328.158314.265680@o13g2000cwo.googlegroups.com>

Jorgen Grahn wrote:

> >  I've read that many people prefer Python and that it is better
than
> > Perl. However, I want to ask a few other questions.
>
> I could go on and on, but this essay by Eric Raymond says it better:
>
>   http://www.linuxjournal.com/article/3882

His survey of programming languages in "The Art of Unix Programming",
available at
http://www.catb.org/~esr/writings/taoup/html/languageschapter.html , is
interesting (and biased). Raymond evaluates C, C++, Shell, Perl, Tcl,
Python, Java, and Emacs Lisp.



From tim.golden at viacom-outdoor.co.uk  Wed Feb  2 04:11:17 2005
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Wed, 2 Feb 2005 09:11:17 -0000 
Subject: Python checkin driver version on windows
Message-ID: <9A28C052FF32734DACB0A288A3533991035A2C@vogbs009.gb.vo.local>

[Chris Jameyson]
| Is there a way to check driver version information on windows through
| Python?  
| 
| I'd like to pull driver version, digital sig from the same place that
| 'device manager' gets it's information.

It's possible that WMI can do it, although device etc. aren't
my area, so I'm not sure what to look for. If you can find
what you want in here:

http://groups-beta.google.com/group/microsoft.public.win32.programmer.wmi

(or anywhere else), I'm happy to help you to translate it to
Python WMI.

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________


From carribeiro at gmail.com  Mon Feb  7 19:04:07 2005
From: carribeiro at gmail.com (Carlos Ribeiro)
Date: Mon, 7 Feb 2005 22:04:07 -0200
Subject: empty classes as c structs?
In-Reply-To: <yNWdnawgn_qPTZrfRVn-sg@comcast.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>
	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>
	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>
	<mailman.2049.1107750700.22381.python-list@python.org>
	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com> <4207606E.4040806@iinet.net.au>
	<mailman.2094.1107800398.22381.python-list@python.org>
	<XYqdnb9bj4sVJZrfRVn-vw@comcast.com>
	<mailman.2107.1107807729.22381.python-list@python.org>
	<yNWdnawgn_qPTZrfRVn-sg@comcast.com>
Message-ID: <864d3709050207160479734dfc@mail.gmail.com>

On Mon, 07 Feb 2005 13:31:20 -0700, Steven Bethard
<steven.bethard at gmail.com> wrote:
> Carlos Ribeiro wrote:
> > On Mon, 07 Feb 2005 11:50:53 -0700, Steven Bethard
> > <steven.bethard at gmail.com> wrote:
> >
> >>Michael Spencer wrote:
> >>
> >>>We could use __add__, instead for combining namespaces
> >>
> >>I don't think this is a good idea.  For the same reasons that dicts
> >>don't have an __add__ (how should attributes with different values be
> >>combined?), I don't think Bunch/Namespace should have an __add__.
> >
> > For entirely unrelated reasons I did it for a bunch-like class of
> > mine, and called it 'merge'. For this particular application it was a
> > better name than update and append, but that's IMHO.
> 
> Did 'merge' have the same semantics as the 'update' being discussed?
> That is, did it modify the first 'bunch'?  Or did it create a new
> 'bunch'?  To me, 'merge' sounds more like the second...

In my particular example it was more like the second, but it doesn't
apply exactly because the goal was a little bit different; I
implemented it to merge two configuration dictionaries, one being the
'base' (with default values) and the other one with values to
overrride the base values. Anyway, it was just a suggestion; and while
I don't think that merge really implies one behavior over the other,
having it as a constructor does make sense...

-- 
Carlos Ribeiro
Consultoria em Projetos
blog: http://rascunhosrotos.blogspot.com
blog: http://pythonnotes.blogspot.com
mail: carribeiro at gmail.com
mail: carribeiro at yahoo.com


From http  Fri Feb  4 01:00:57 2005
From: http (Paul Rubin)
Date: 03 Feb 2005 22:00:57 -0800
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<YlBMd.27277$MX2.19117@twister.nyroc.rr.com>
	<7xy8e5jagh.fsf@ruckus.brouhaha.com>
	<1107490052.542546.285950@c13g2000cwb.googlegroups.com>
Message-ID: <7xekfwc19i.fsf@ruckus.brouhaha.com>

"M.E.Farmer" <mefjr75 at hotmail.com> writes:
> To emulate a table you use the div and span tag.
> (really you can do just about anything with div and span)

Hmm, that's pretty interesting, I didn't realize you could specify
width's with CSS.  Thanks.  http://glish.com/css/9.asp shows a
2-column example.

I don't know that the browser necessarily renders that faster than it
renders a table, but there's surely less crap in the HTML, which is
always good.  I may start using that method.

I remember seeing something a long time ago where someone used normal
html tags to create something like tab stops, so he could just place
things where he wanted them without the browser having to read the
whole page to automatically size the columns.  But I haven't been able
to figure out what tags he used for that, and don't remember where I
saw it.

As you can probably tell, I'm ok with basic HTML but am no wizard.
I'm more interested in backend implementation.


From dodysw at gmail.com  Mon Feb  7 06:41:51 2005
From: dodysw at gmail.com (dody suria wijaya)
Date: Mon, 7 Feb 2005 18:41:51 +0700
Subject: Get importer module from imported module
In-Reply-To: <Xns95F67153AE259duncanrcpcouk@127.0.0.1>
References: <mailman.2058.1107773305.22381.python-list@python.org>
	<Xns95F67153AE259duncanrcpcouk@127.0.0.1>
Message-ID: <1145301883.20050207184151@asp.co.id>

Thank you for such a quick reply. There were some details I
had left behind related to my case that I guess would now
need to be told to better illustrate the problem.

I have many different module of "a", let's called it a1, a2 ...
a100, and there is only one module "b". Here's a better
example (and using some of your tips):

#Module a1
import b
class Main(b.Basic): pass

#Module a2
import b
class Main(b.Basic): pass

#Module a3
import b
class Main(b.Basic): pass

.
.
.

#Module b
class Basic: pass
class SaltyMixIn: pass
class SugaryMixIn: pass
def Salty():
    class Food(SaltyMixIn,module_importing_me.Main): pass
    return Food()
def Sweet():
    class Food(SugaryMixIn,module_importing_me.Main): pass
    return Food()

#Module c
import sys
food_no = sys.argv[1]
m = __import__(food_no)
goodie = m.Salty()


"import a" inside b would not solve the problem, since there
are many "module a" and module b does not know beforehand
which module had imported it. I could, say, put these
additional lines on all "module a" (which I previously had
and worked):

#Module a1
import b
class Main(b.Basic): pass
class Salty(SaltyMixIn,Main): pass      # new
class Sweet(SaltyMixIn,Main): pass      # new


but dislike it for personal taste; code dupes (there could
be a lot of food flavouring), and sheer messiness.


-- 
  dody suria wijaya
  YahooMsgr ID: dody

Monday, February 7, 2005, 6:10:14 PM, you wrote:

DB> dody suria wijaya wrote:

>> 
>> I found this problem when trying to split a module into two.
>> Here's an example:
>> 
>>==============
>> #Module a (a.py):
>> from b import *
>> class Main: pass
>>==============
>> 
>>==============
>> #Module b (b.py)
>> def How():
>>     Main_instance = module_a.Main()
>>     return Main_instance
>>==============
>> 
>>> import a
>>> a.How()
>> 
>> 
>> the problem would show at How() function. I have been unable
>> to get variable pointing to module a from inside module b.
>> In short, I need to have a variable pointing to the module
>> whose importing me.
>> 
>> 

DB> 'import a' will let you reference module 'a',
DB> unless 'a' was invoked as a 
DB> script in which case you would need 'import __main__'.

DB> #Module b (b.py)
DB> import a
DB> def How():
DB>     Main_instance = a.Main()
DB>     return Main_instance

DB> But: keep in mind that all statements (except
DB> 'global') are executable in 
DB> Python, so you must not call How() until after the Main class has actually
DB> been created. This is one reason why it is
DB> generally safer to import a 
DB> module and do the lookup when you need it instead of using 'from
DB> amodule import *' which can only get at the names which exist at the time
DB> it is executed.

DB> A better solution  would be to structure your code so that your modules
DB> don't have any mutual dependencies. If your
DB> function 'How()' is in module b 
DB> then just call 'b.How()' wherever you use it and lose the import of 'b'
DB> from 'a' altogether.



From zathras at thwackety.com  Thu Feb 10 17:30:00 2005
From: zathras at thwackety.com (Michael Sparks)
Date: Thu, 10 Feb 2005 22:30:00 +0000 (GMT)
Subject: Python v.s. c++
In-Reply-To: <a31065ef05021010117839eb05@mail.gmail.com>
Message-ID: <Pine.LNX.4.44.0502102227350.18014-100000@pingu.thwackety.com>

On Thu, 10 Feb 2005, xiaobin yang wrote:

> Hi,  if i am already skillful with c++.  Is it useful to learn python? thanks!

Personally I would say yes, largely because I tend to find them
complementary languages. It's easier (IMO) to explore random ideas in
python without getting nailed into corners too early. You can then nail
things in the right corners later on should you decide for an optimised
version written in (or written partially in) C++.

Regards,


Michael.



From tom.willis at gmail.com  Tue Feb 22 19:54:13 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Tue, 22 Feb 2005 19:54:13 -0500
Subject: searching pdf files for certain info
In-Reply-To: <cvfmok$11l$1@solaris.cc.vt.edu>
References: <cvfdgg$fr0$1@solaris.cc.vt.edu> <cvfg5a$6g6$1@news.mch.sbs.de>
	<cvfhe5$lcv$1@solaris.cc.vt.edu> <cvfi2q$dto$1@news.mch.sbs.de>
	<cvfk26$qb3$1@solaris.cc.vt.edu>
	<mailman.2937.1109088725.22381.python-list@python.org>
	<cvfmok$11l$1@solaris.cc.vt.edu>
Message-ID: <b54d048905022216544c62ac4d@mail.gmail.com>

Well sporadic spaces in strings would cause problems would it not?

an example....


The String: "Patient Face Sheet"--->pdftotext--->"P a tie n t Face Sheet"

I'm just curious if you see anything like that, since I really have no
clue about ps or pdf etc...but I have a strong desire to replace a
really flaky commercial tool. And if I can do it with free stuff, all
the better my boss will love me.


On Tue, 22 Feb 2005 11:31:16 -0500, rbt <rbt at athop1.ath.vt.edu> wrote:
> Tom Willis wrote:
> > I tried that for something not python related and I was getting
> > sporadic spaces everywhere.
> >
> > I am assuming this is not the case in your experience?
> >
> >
> > On Tue, 22 Feb 2005 10:45:09 -0500, rbt <rbt at athop1.ath.vt.edu> wrote:
> >
> >>Andreas Lobinger wrote:
> >>
> >>>Aloha,
> >>>
> >>>rbt wrote:
> >>>
> >>>
> >>>>Thanks guys... what if I convert it to PS via printing it to a file or
> >>>>something? Would that make it easier to work with?
> >>>
> >>>
> >>>Not really...
> >>>The classical PS Drivers (f.e. Acroread4-Unix print-> ps) simply
> >>>define the pdf graphics and text operators as PS commands and
> >>>copy the pdf content directly.
> >>>
> >>>Wishing a happy day
> >>>    LOBI
> >>
> >>I downloaded ghostscript for Win32 and added it to my PATH
> >>(C:\gs\gs8.15\lib AND C:\gs\gs8.15\bin). I found that ps2ascii works
> >>well on PDF files and it's entirely free.
> >>
> >>Usage:
> >>
> >>ps2ascii PDF_file.pdf > ASCII_file.txt
> >>
> >>However, bundling a 9+ MB package with a 5K script and convincing users
> >>to install it is another matter altogether.
> >>--
> >>http://mail.python.org/mailman/listinfo/python-list
> >>
> >
> >
> >
> 
> For my purpose, it works fine. I'm searching for certain strings that
> might be in the document... all I need is a readable file. Layout, fonts
> and/or presentation is unimportant to me.
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
Thomas G. Willis
http://paperbackmusic.net


From fredrik at pythonware.com  Fri Feb 11 12:45:21 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 11 Feb 2005 18:45:21 +0100
Subject: sre is broken in SuSE 9.2
References: <mailman.2299.1108029731.22381.python-list@python.org><1108060527.378911.146240@o13g2000cwo.googlegroups.com><cugc2v$i8u$1@swifty.westend.com><1108064973.719544.228970@z14g2000cwz.googlegroups.com><mailman.2372.1108115088.22381.python-list@python.org>
	<1108133339.401022.272310@f14g2000cwb.googlegroups.com>
Message-ID: <cuiqrd$snd$1@sea.gmane.org>

Serge Orlov wrote:

>> >>> re.compile(ur'\w+', re.U).findall(u'\xb5\xba\xe4\u0430')
>> [u'\xb5\xba\xe4\u0430']
>
> I can't find the strict definition of isalpha, but I believe average
> C program shouldn't care about the current locale alphabet, so isalpha
> is a union of all supported characters in all alphabets

nope.  isalpha() depends on the locale, as does all other ctype functions
(this also applies to wctype, on some platforms).

</F> 





From dial#####$$NOSPAM##$#$## at gmail.com  Tue Feb  8 09:02:18 2005
From: dial#####$$NOSPAM##$#$## at gmail.com (Valentino Volonghi aka Dialtone)
Date: Tue, 8 Feb 2005 15:02:18 +0100
Subject: re-entrancy question
References: <mailman.2173.1107867336.22381.python-list@python.org>
Message-ID: <1gro6zq.10loucw1l7pkpzN%dial#####$$NOSPAM##$#$##@gmail.com>

Tim Golden <tim.golden at viacom-outdoor.co.uk> wrote:

> Now *where* is there any mention of Twisted, either in the original
> post or in my reply? As I read it, the OP is doing something which

Ya sorry. I thought this was crossposted but the OP posted 2 different
emails to both python-list and twisted-python ML. This very same message
was posted on the twisted mailing list.

The answer anyway was already given on the other list: there are no
re-entrancy problems :).

-- 
Valentino Volonghi aka Dialtone
Now Running MacOSX 10.3.7
Blog: http://vvolonghi.blogspot.com
http://weever.berlios.de


From fredrik at pythonware.com  Tue Feb 15 06:48:54 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 15 Feb 2005 12:48:54 +0100
Subject: Accessing Objects Based On Their ID
References: <uc39e2-63h1.ln1@eskimo.tundraware.com>
	<cusn7r$kdu$1@sea.gmane.org>
Message-ID: <cusneh$ku7$1@sea.gmane.org>

> longer answer: write a small C extension that casts an integer (or long integer)
> argument to a PyObject, increments the refcount, and returns the object.

here's a pointer to a pointer to such a function, btw:

    http://mail.python.org/pipermail/python-list/1999-October/013715.html

(see other messages in that thread for more on why this is a stupid idea)

</F> 





From daniel at bowettsolutions.com  Sat Feb 19 17:04:41 2005
From: daniel at bowettsolutions.com (Daniel Bowett)
Date: Sat, 19 Feb 2005 22:04:41 +0000
Subject: PIL Expand Canvas
Message-ID: <cv8dct$ccs$1@sea.gmane.org>

I'm new to the PIL module but think it would be useful for dealing with 
all the product images for the sites I work on. I can see how to do most 
things I need apart from expanding the canvas.

By that I mean if I have an image which is 200 pixels high and 180 
pixels wide - I will want to pad it left and right by 10 pixels with 
white space to make it a 200x200 square.

Is this possible?



From fredrik at pythonware.com  Tue Feb 22 11:04:23 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 22 Feb 2005 17:04:23 +0100
Subject: Creating Button arrays with different commands using Tkinter
References: <1109077464.543960.282830@o13g2000cwo.googlegroups.com>
Message-ID: <cvfkuo$54e$1@sea.gmane.org>

"Harlin" <harlinseritt at yahoo.com> wrote

>I have an array of Appnames. Let's say they are 'Monkeys', 'Cats',
> 'Birds'.
>
> I would like create a button array with these:
>
> ---Start Code---
> # Constructing and displaying buttons
> for a in Appnames:
>   Button(root, text=a, command=lambda:self.OpenFile(a)).pack()
>
> # Somewhere else I have this function defined within the class...
> def OpenFile(self, AppName):
>   fh = open(AppName+".txt", 'r').read()
>   do something with fh
>
> ---End Code---
>
> When I do this, whatever the last value a was is what the each button's
> command option is.

that's how lexical scoping works: you're passing in the value "a" has
when you click the button, not the value it had when you created the
lambda.

> Does anyone know what I can do to differentiate each
> button so that it has its own separate argument for self.OpenFile?

bind to the object instead of binding to the name:

    for a in Appnames:
        Button(root, text=a, command=lambda a=a: self.OpenFile(a)).pack()

</F> 





From jgrahn-nntq at algonet.se  Sat Feb  5 04:53:07 2005
From: jgrahn-nntq at algonet.se (Jorgen Grahn)
Date: 5 Feb 2005 09:53:07 GMT
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<1107188359.375703.110590@f14g2000cwb.googlegroups.com>
	<1gr9lyc.1rrm543162uefN%aleaxit@yahoo.com>
Message-ID: <slrnd095op.rr5.jgrahn-nntq@frailea.sa.invalid>

On Mon, 31 Jan 2005 18:49:15 +0100, Alex Martelli <aleaxit at yahoo.com> wrote:
> Michael Tobis <mt at 3planes.com> wrote:
> 
>> With all due respect, I think "so go away if you don't like it" is
>> excessive, and "so go away if you don't like it and you obviously don't
>> like it so definitely go away" is more so. The writer is obviously
> 
> I disagree: I believe that, if the poster really meant what he wrote, he
> may well be happier using other languages and all the declarations he
> cherishes, so recommending that course of action to him is quite proper
> on my part.

You are wrong, for once.

That poster could have been me a few years back, when I was younger, more
stupid, more arrogant and less experienced. He'll get over it.

Also, what he described /is/ a problem. I still get bitten by it now and
then. It's just that it has even larger /benefits/ which aren't obvious at
first.

In BASIC, /bin/sh and perl without 'use strict', the lack of declarations is
only a negative thing without benefits. If you know those languages, it's
easy to jump to the conclusion that this applies to Python, too.

/Jorgen

-- 
  // Jorgen Grahn <jgrahn@       Ph'nglui mglw'nafh Cthulhu
\X/                algonet.se>   R'lyeh wgah'nagl fhtagn!


From paddy3118 at netscape.net  Sun Feb 27 03:03:05 2005
From: paddy3118 at netscape.net (Paddy)
Date: 27 Feb 2005 00:03:05 -0800
Subject: Is it possible to pass a parameter by reference?
References: <mailman.3112.1109480634.22381.python-list@python.org>
Message-ID: <1109491385.293922.120880@g14g2000cwa.googlegroups.com>

It is usually clearer to explicitely return values that are changed by
a function and re-assign it to the same variable,

x=something1
a = something2
def f1(s,t):
  # do something with t,
  # do something to s
  return s
a = f1(a,x)

Be aware however that you can wrap 'a' in a list for the same effect,
(but it is not as easy to read).

x=something1
aa = [something2]
def f2(ss,t):
  s= ss[0]
  # do something with t,
  # do something to s
  ss[0]=s
f2(aa,x)
a=aa[0]

-- Pad.



From google at vertigrated.com  Fri Feb 18 13:35:42 2005
From: google at vertigrated.com (fuzzylollipop)
Date: 18 Feb 2005 10:35:42 -0800
Subject: having troubleing finding package for Twisted 1.3 for Mac OS X
	10.3.x
In-Reply-To: <111c1jbfgb1vl5a@corp.supernews.com>
References: <1108690646.289866.268380@l41g2000cwc.googlegroups.com>
	<111c1jbfgb1vl5a@corp.supernews.com>
Message-ID: <1108751742.146361.235120@z14g2000cwz.googlegroups.com>

nope I was hoping there was a more "mac" way of doing that :-)

I will research that and see what I can get to work, I am born-again
Mac user ( last machine was a 7200 ) just got a PowerBook so I am in
re-learn mode again ( am familiar with Unix that is why I wanted the
PowerBook as a change of pace )



From ncoghlan at iinet.net.au  Sat Feb 26 23:01:00 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 27 Feb 2005 14:01:00 +1000
Subject: any Python equivalent of Math::Polynomial::Solve?
In-Reply-To: <just-ACE943.17364326022005@news1.news.xs4all.nl>
References: <just-420C1F.16423926022005@news1.news.xs4all.nl>	<mailman.3092.1109434899.22381.python-list@python.org>
	<just-ACE943.17364326022005@news1.news.xs4all.nl>
Message-ID: <422145FC.6000004@iinet.net.au>

Just wrote:
> (Hm, I had the impression that scipy != Konrad Hinsen's Scientific 
> module.)

You're probably right :)

> I had played with [1], but it "only" calculates one root, and I need all 
> roots (specifically, for a quintic equation). [2] doesn't seem to be a 
> solver?

Actually, I was curious whether the 'zeros' method in [2] did the right thing.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From gandalf at geochemsource.com  Tue Feb  8 07:46:50 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Tue, 08 Feb 2005 13:46:50 +0100
Subject: User Identification
In-Reply-To: <cuabr1$9hf$1@sea.gmane.org>
References: <slrnd0hc3d.1pq.rparnes@debian.localdomain>
	<cuabr1$9hf$1@sea.gmane.org>
Message-ID: <4208B4BA.9060209@geochemsource.com>


>how about:
>
>  
>
>>>>import getpass
>>>>getpass.getuser()
>>>>        
>>>>
>'gromit'
>
>  
>
Hmm, yours is better. It also works on Windows. :-)
I wonder why os.getuser() does not work in Windows - apparently there is 
a good implementation for Windows.

-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From ncoghlan at iinet.net.au  Sun Feb 20 08:53:50 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 20 Feb 2005 23:53:50 +1000
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <1108849567.136885.141960@z14g2000cwz.googlegroups.com>
References: <cuo71l$gig$1@usenet.otenet.gr>	<42172136$0$27576$9b622d9e@news.freenet.de>	<cv7i57$d0v$1@usenet.otenet.gr>
	<cv7k8e$4pa$03$1@news.t-online.com>	<cv7m2m$gp$1@usenet.otenet.gr>
	<cv7nh1$b57$03$1@news.t-online.com>	<cv7r15$lhm$1@usenet.otenet.gr>
	<cv7vte$t1g$01$1@news.t-online.com>
	<1108849567.136885.141960@z14g2000cwz.googlegroups.com>
Message-ID: <4218966E.5030605@iinet.net.au>

Pat wrote:
> On Windows, most users are used to installing precompiled binary
> packages, rather than compiling from source.  When you do have to
> compile from source, it often requires you to fiddle with nitty gritty
> details about which you'd rather remain ignorant.  The less fiddling
> required, the happier the user will be, and the easier it will be for
> that product to get adopted on that platform.  No psychic abilities are
> required.  No Python abilities are required, either, for that matter.
> ;-)

And the fact that building *any* Windows native program without commercial 
software is a PITA is the py-dev crew's fault, how?

The python.org releases provide pre-built binaries for Windows, support for 
compiling Windows extensions with various compilers (including MinGW), and 
autoconf/automake support for POSIX-ish platforms (including Cygwin).

For native Windows compilation of the interpreter, they support MSVC6 and MSVC7.1.

If you're a serious commercial Windows shop, you will have one of the Microsoft 
compiler suites installed *somewhere*. At that point, building your own version 
of Python is trivial.

Which leaves the hobbyists, and those companies which, for whatever reason, 
choose not to use Visual Studio to build C/C++ code on Windows.

If it meets your needs, the easiest solution is to build a non-native version 
using Cygwin (./configure, make, make altinstall). That's what I currently do, 
as the easiest free way to hack Python on a Windows box.

Which means our target group is now only those who want to build a Windows 
Python binary, and don't want to use Visual Studio, and don't want to use Cygwin 
(hmm, the group under discussion must be getting rather small by now).

Anyway, to support this group, the real thing that is needed is a tool to 
translate the MSVC7.1 solution files into GNU make files (so the MSYS make 
utility can parse them and invoke MinGW or the free MS compiler appropriately)

For anyone who actually wants to make this work, this message summarises where I 
got to before giving up and switching to a different platform for builds:
http://mail.python.org/pipermail/python-dev/2004-August/047215.html

Things have moved on since then - the Python project files no longer reference 
the unneeded ODBC libraries, but they do reference options the version of 
vcproj2make in the python-dev archives doesn't understand.

Also, vcproj2make has a dependency on PyXML, which isn't necessarily obvious 
from the error message you get when the sln parser fails to work.

It can be done, and it could be automated, but it doesn't take a Python core 
hacker to do it - it takes someone who cares about it, and understands GNU make 
and Python well enough to maintain vcproj2make.

To finish the job, someone would need to:
1. Commit to maintaining vcproj2make
2. Get Garth to put a real license on it
3. Finish it well enough that it works on the Python PCBuild directory
4. Provide instructions (and possibly a script) for building Python with 
vcproj2make, MSYS and MinGW.
5. See about including those instructions in Python CVS

(MinGW is probably a better option than the free MS compiler, since the files 
you need aren't scattered all over the MS website, embedded in over 300 MB worth 
of downloads, and you aren't bound by the MS EULA. Don't go redistributing 
msvcr71.dll though)

The trick is finding someone who cares enough, or someone who will pay someone 
to care enough - I cared for a while, but not enough to finish it. For what I 
want (hacking the interpreter core), Cygwin suffices, and it's a hell of a lot 
easier.

The pyMinGW folks appear to care, but for reasons best known to them, have 
chosen to track the PCBuild project files manually, rather than automating the 
process. They've also chosen to maintain separate files on their own site, 
rather than providing diff's and submitting appropriate patches to improve MinGW 
support in the main Python CVS. *shrug* Their call.

Cheers,
Nick.

P.S. if Ilias volunteers, or offers to pay someone to do this, instead of just 
complaining, will hell freeze over?)

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From frank at chagford.com  Sun Feb  6 05:06:18 2005
From: frank at chagford.com (Frank Millman)
Date: 6 Feb 2005 02:06:18 -0800
Subject: Python 2.4 binaries for accessing PostgreSQL from Windows?
In-Reply-To: <1107512690.503191.8820@g14g2000cwa.googlegroups.com>
References: <1107512690.503191.8820@g14g2000cwa.googlegroups.com>
Message-ID: <1107684378.491940.55290@o13g2000cwo.googlegroups.com>


Frank Millman wrote:
> Hi all
>
> The subject line says it all.
>
> I have been using pypgsql to access PostgreSQL from Linux and from
> Windows, and it works fine.
>
> I am upgrading to Python 2.4. I can recompile pypgsql for Linux, but
I
> do not have a Windows compiler. SourceForge has a binary for Python
> 2.3, which is the one I have been using. It does not have one for
2.4.
>
> I tried the psycopg site, but it does not seem to have binaries at
all.
>
> Does anyone know if either of these will be available in binary form
> for Python 2.4 on Windows?
>

Thanks for your replies, Gerhard and Josef. I have looked at both
solutions, but neither of them seem quite ideal. Hopefully you can show
me a simple way to overcome my problems.

In the case of pyPgSQL, it is overkill for me to load PgAdmin3 on each
Windows workstation running my accounting app. The binary for Python2.3
had a small libpq.pyd which was perfect for my needs. Don't you have
something similar for 2.4?

I have tried psycopg, and I must say I like it. It installs very
easily, and seems faster than pyPgSQL. My initial testing worked fine,
but as soon as I tried to use it from my app I ran into a problem. I
use wxPython as my front end, and it returns all strings as Python
unicode objects. If I pass these to a query, I get "TypeError: argument
1 must be str, not unicode". I could go through my app and convert all
strings back to type str, but it seems unnecessary. Is there a better
solution?

TIA for any advice.

Frank



From invalidemail at aerojockey.com  Mon Feb 21 06:08:59 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 21 Feb 2005 03:08:59 -0800
Subject: lambda closure question
In-Reply-To: <86k6p2h5g9.fsf@guru.mired.org>
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
	<1108808502.699333.66520@g14g2000cwa.googlegroups.com>
	<mailman.2831.1108814832.22381.python-list@python.org>
	<1108903184.145726.223480@l41g2000cwc.googlegroups.com>
	<86k6p2h5g9.fsf@guru.mired.org>
Message-ID: <1108984139.814936.214990@o13g2000cwo.googlegroups.com>

Mike Meyer wrote:
> "Carl Banks" <invalidemail at aerojockey.com> writes:
>
> > Say you have a suite of functions, all of which are called by some
main
> > function and each other, and all of which need to access a lot of
the
> > same data.  The best, most straightforward way to do it is to have
the
> > common data be a local variable of the main function, and nest the
> > suite inside it.  The other way to do it, passing around a common
data
> > structure, add complexity and hurts performance.
>
> The third way to do it is to make the thing a class.

Which is kind of the same thing as passing a structure around, only
with a somewhat more convenient syntax.  But yes.


> Make all the
> functions methods of the class, and all the data instance
> variables. You may well want to make the main function the __call__
> method of the class. In an OO environment, this may be a better, more
> straightforward way than nesting fnctions.

There are good reasons for sometimes using a class, but
straightforwardness is, IMHO, not one of them.

You're writing a function (in the abstract sense: you are creating an
entity that you call with input to get output, and that has local
storage that doesn't need to exist afterwards).  Is it more
straightforward to implement an (abstract) function with a function
object (i.e., the object that was designed exactly for that purpose),
or with a class (designed for a different purpose: to create new
types)?  I'd definitely go with the former.  Implementing an (abstract)
function as a class obscures its purpose.

I agree that there are many times when a class is a more appropriate
implementation of an (abstract) function, such as if your suite of
subfunctions has to rebind common variables, or if your (abstract)
function has so many return values it's better to define it as a class
and have the caller refer to the attributes.  However, I'd say this
comes at the expense of straightforwardness (or, rather, it exchanges
one sort of striaghtforwardness for another sort judged more
important).


As for implementing an (abstract) function as a class just because
you're in an OO environment: that's just thinking backwards.

"OOP is the shizzle so I'm going to implement everything as a class,"
is simply the wrong way to think.  There's a reason OOP is the shizzle:
because it's very often a good representation of the problem.  But it
isn't always.  And when it isn't,  and when a better way exists (as in
this case), you should use the better way, even in the highly OO
environment.  OOP is a means, not an end.


-- 
CARL BANKS



From ncoghlan at iinet.net.au  Sat Feb 19 22:49:52 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 20 Feb 2005 13:49:52 +1000
Subject: [Fwd: Re: [Uuu-devel] languages] <-- Why Python
In-Reply-To: <7xfyzrgbif.fsf@ruckus.brouhaha.com>
References: <mailman.2781.1108677768.22381.python-list@python.org>	<1108678805.542584.171930@z14g2000cwz.googlegroups.com>	<mailman.2783.1108679758.22381.python-list@python.org>	<864qgaisoq.fsf@guru.mired.org>	<mailman.2785.1108689484.22381.python-list@python.org>	<86vf8qhcql.fsf@guru.mired.org>	<mailman.2787.1108691319.22381.python-list@python.org>	<86r7jdh5vw.fsf@guru.mired.org>	<mailman.2852.1108869628.22381.python-list@python.org>
	<7xfyzrgbif.fsf@ruckus.brouhaha.com>
Message-ID: <421808E0.2090604@iinet.net.au>

Paul Rubin wrote:
> Nick Coghlan <ncoghlan at iinet.net.au> writes:
> 
>>Compare out-of-the-box Python:
>>   a = 1 + 2 + 3 + 4
>>
>>And out-of-the-box Lisp:
>>   (setq a (+ 1 2 3 4))
>>
>>Which language has the lower barrier for entry? That should be a
>>fairly important consideration for a language that is going to sit at
>>the heart of an OS.
> 
> 
> Huh?  Why does mucking about in the heart of an OS need a low barrier
> of entry?

It doesn't. I was looking at it from the point of view of *scripting* the OS - 
which *should* have a low barrier for entry :)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From alanmk at hotmail.com  Thu Feb 10 15:45:11 2005
From: alanmk at hotmail.com (Alan Kennedy)
Date: Thu, 10 Feb 2005 20:45:11 +0000
Subject: is there a safe marshaler?
In-Reply-To: <9RMOd.47295$Z14.32810@news.indigo.ie>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<9RMOd.47295$Z14.32810@news.indigo.ie>
Message-ID: <rFPOd.47305$Z14.32850@news.indigo.ie>

[Alan Kennedy]
> What I find particularly intriguing is the JSON-RPC protocol, which 
> looks like a nice lightweight alternative to XML-RPC.
> 
> http://oss.metaparadigm.com/jsonrpc/
> 
> Also interesting is the browser embeddable JSON-RPC client written in 
> javascript, for which you can see a demo here
> 
> http://oss.metaparadigm.com/jsonrpc/demos.html

I should have mentioned as well that there is a python JSON-RPC server 
implementation, which incudes a complete JSON<-->python-objects codec.

http://www.json-rpc.org/pyjsonrpc/index.xhtml

regards,

-- 
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan


From tom.willis at gmail.com  Mon Feb 14 10:24:04 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Mon, 14 Feb 2005 10:24:04 -0500
Subject: Python UPS / FedEx Shipping Module
In-Reply-To: <4210BAF7.9030106@mediapulse.com>
References: <mailman.2411.1108149803.22381.python-list@python.org>
	<udePd.660$nC5.453@twister.nyroc.rr.com>
	<b54d0489050212123430ed621d@mail.gmail.com>
	<4210BAF7.9030106@mediapulse.com>
Message-ID: <b54d0489050214072447c17920@mail.gmail.com>

Good to know. 

i've always thought that python would make an excellent solution for
transportation and logistics software. I used to maintain a nasty vb6
solution, and a lot of the brick walls could have been overcome by
utilizing the dynamic nature of python.


But, there is not enough hours in the day. And writing a solution puts
you in an odd relationship with your partners(UPS/FexEx etc...).


On one hand you are helping them indirectly sell their services,  On
the other, you are sort of competing with them, so, those companies
have plenty of reason to screw with you by changing the specs, lot's
of hoops to jump through to contiuously be certified.

I guess I care anyway because the problem domain is so interesting to
me. Maybe it's because I'm running a fever. :)

Thanks for the info.



On Mon, 14 Feb 2005 09:51:35 -0500, Gabriel Cooper
<gabriel.cooper at mediapulse.com> wrote:
> 
> 
> Tom Willis wrote:
> 
> >Are the modules just accessing the published apis for their webservices?
> >
> >I'm just wondering because I used to work for a logistics mgmt
> >company that paid money to be a strategic partner with
> >FedEx/UPS/Airborn etc so that they could information on how to return
> >rates/print labels/generate edi's/calculate arrival times etc.
> >
> >I'd get a good laugh out of it suddenly being freely available now.
> >
> Yes, they use the free API's that have always been freely available.
> They're just *Impossible* to find on either of UPS's OR FedEx's
> websites. It took me no less than an hour and likely more just to find
> the documentation pages on each site. As for putting them up on the web,
> I should be able to get them up by the end of the week.
> 
> Gabriel.
> 


-- 
Thomas G. Willis
http://paperbackmusic.net


From deetsNOSPAM at web.de  Mon Feb 21 10:49:22 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 21 Feb 2005 16:49:22 +0100
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr>
	<42185b05$0$15460$9b622d9e@news.freenet.de>
	<cv9sdo$69n$3@usenet.otenet.gr>
	<42189527$0$6260$9b622d9e@news.freenet.de>
	<cvadcj$mqc$1@usenet.otenet.gr>
	<mailman.2866.1108917759.22381.python-list@python.org>
	<cvafgu$2lk$1@usenet.otenet.gr>
	<4218cafe$0$8790$9b622d9e@news.freenet.de>
	<1108922969.140196.304380@z14g2000cwz.googlegroups.com>
	<4219fca9$0$44593$a1866201@visi.com>
Message-ID: <37ue60F5hqrevU1@individual.net>

> I've never understood the problem with long URLs.  Many
> newsreaders let you click on them.  If not, you just cut/paste
> it into a browser (with a shellscript a couple lines long, you
> can start firefox with the URL on the X clipboard with a single
> command).

Some break the urls - so copy and pasting yields only start or end of the
urls, depending on the browser/edit control your pasting into.

-- 
Regards,

Diez B. Roggisch


From reinhold-birkenfeld-nospam at wolke7.net  Tue Feb  8 15:15:29 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Tue, 08 Feb 2005 21:15:29 +0100
Subject: Python versus Perl ?
In-Reply-To: <mailman.2207.1107888646.22381.python-list@python.org>
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com><hkhc01dnpmmhn980quijqil40653qipdki@4ax.com>	<cuavn1$bag$1@nntp.msstate.edu>
	<mailman.2207.1107888646.22381.python-list@python.org>
Message-ID: <36skv1F53c5feU2@individual.net>

Fredrik Lundh wrote:
> m" <m at m.com> wrote:
> 
>>>>If Python is better than Perl, I'm curious how really significant
>>>>those advantages are ?
>>
>> speedwise, i think perl is faster than python and python performed the slowest as shown in 
>> http://www.flat222.org/mac/bench/
> 
> if you use Python mostly to write empty loops, your programming license
> should be revoked.  the benchmark author seems to have realized that, as
> can be seen from the "it's dead" paragraph at the top of the page, which
> makes me wonder why you posted this link...

Especially when you read

"""
I found the performance of Python for these benchmarks really surprising
as it is at odds to my everyday experience.
"""

you will seriously think about the benchmark's significance.

Reinhold


From sjmachin at lexicon.net  Sun Feb 13 17:39:20 2005
From: sjmachin at lexicon.net (John Machin)
Date: 13 Feb 2005 14:39:20 -0800
Subject: win32 extension install hiccup
In-Reply-To: <cuoh3s$87u$1@lust.ihug.co.nz>
References: <cuoh3s$87u$1@lust.ihug.co.nz>
Message-ID: <1108334360.712733.103190@c13g2000cwb.googlegroups.com>


MM wrote:
> Hi,
>
> I downloaded the latest win32all build 202 and tried to install under

> win2000 with Py2.4. Install complains about 'couldn't open py2.4 to
run
> script pywin32-preinstall.py'. I checked the directories and there
was
> no sign of this file (preinstall.py) so I presume this is why it
bombed.

You presume triply incorrectly. (1) The error message explicitly says
it couldn't find the Python executable. (2) The file that Python would
have run is pywin32-preinstall.py, not preinstall.py. (3) You shouldn't
expect to find an install script lying around after an install,
successful or failed, if the installer is cleaning up after itself.

> How do I fix this? Thanks, matthew.

Install Python 2.4 in C:\Python24 and try again.



From vincent at visualtrans.de  Fri Feb 18 01:06:11 2005
From: vincent at visualtrans.de (Vincent Wehren)
Date: Fri, 18 Feb 2005 07:06:11 +0100
Subject: How to I access the filename with TkFileDialog?
In-Reply-To: <1108670472.375513.214220@o13g2000cwo.googlegroups.com>
References: <1108670472.375513.214220@o13g2000cwo.googlegroups.com>
Message-ID: <cv40kj$8i6$1@news3.zwoll1.ov.home.nl>

imphasing wrote:
> I'm writing a python program to open a file, and display it onscreen,
> but I can't seem to find the var that "tkOpenFileName" returns to. It's
> not much use if you can't get the filename you just chose, so there
> must be a way to get it. Could anyone help me?
> 
> Thanks,
> Alex
> 

openfilename=tkFileDialog.askopenfilename(filetypes=[("all files", "*")])

--

Vincent Wehren


From eliediamonds at gmail.com  Fri Feb 11 12:52:36 2005
From: eliediamonds at gmail.com (eliediamonds at gmail.com)
Date: 11 Feb 2005 09:52:36 -0800
Subject: Partnership Opportunity
Message-ID: <1108144356.767765.83200@l41g2000cwc.googlegroups.com>

Partnership Opportunity
Hello,
I am with a manufacturer of fine jewelry and am currently looking for
those interested in forming a partnership to sell jewelry on eBay or
anywhere else.  I work for Elie International, a manufacturer of fine
jewelry located in the heart of the diamond district in New York City.
We have been in the jewelry business for over 23 years and are
registered with the Jewelers Board of Trade (JBT registration #
01222207) and Dunne & Bradstreet.
For the first time in our company's history we are looking to build
partnerships with individual sellers. We hold an extensive stock of
over 24,000 items and need vendors to keep it moving.  By selling our
merchandise on eBay, or to family and friends, we become your partner
not your competitor and offer you fine jewelry at wholesale prices
which are a FRACTION of what YOUR CUSTOMERS pay in retail stores.  We
understand that many buyers are apprehensive about paying for
merchandise up front, and we have devised our Direct Purchase
Partnership program with these concerns in mind.  Our Guaranteed Movers
Policy states that if you cannot sell one of our items within 6 months
we will exchange it.  This insures that you are never stuck with
merchandise you can't sell. We want to strongly emphasize that this
is a partnership and we offer our partners the full support that they
need, including pictures, prices and descriptions of all merchandise to
get them started. Please contact us via e-mail at elieint at aol.com or at
(212) 719-0090 if you are interested or have any questions and please
include where you saw this message.  Thank You



From jordan2856977 at 163.com  Sat Feb  5 21:07:15 2005
From: jordan2856977 at 163.com (jordan2856977)
Date: 5 Feb 2005 18:07:15 -0800
Subject: sos!
References: <6d2e4eef.0502050342.d8744cb@posting.google.com>
	<4204db04$0$14112$626a14ce@news.free.fr>
Message-ID: <6d2e4eef.0502051807.48b3ac3f@posting.google.com>

Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote in message news:<4204db04$0$14112$626a14ce at news.free.fr>...
> jordan2856977 a ?crit :
> > hellow everybody! I'm from china. I'm a beginner of python. in china,
> > python is not a fashionable language, so it's difficult to find some
> > books about python. finally,I find a book named "python how to
> > program" wrote by H.M.Deitel . who can tell me where can I find some
> > interesting source code about python. otherwise, I will fell boring
> > about study!
> 
> Well, if you want to study some interesting source code, you have the 
> whole Python standard lib, and *many* open source programs (Zope, 
> Twisted, etc...)
> 
> You can also find some good free books online, like Dive Into Python, or 
>   Text Processing With Python. (google should find relevant URLs).
> 
> HTH, and welcome.

----------------------------------------------------------
thanks!


From peter at engcorp.com  Thu Feb 17 07:33:15 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 17 Feb 2005 07:33:15 -0500
Subject: PythonCard and Py2Exe
In-Reply-To: <1108621701.919626.136070@o13g2000cwo.googlegroups.com>
References: <1108476282.790371.155670@l41g2000cwc.googlegroups.com>
	<mailman.2620.1108476543.22381.python-list@python.org>
	<1108484617.908022.280320@l41g2000cwc.googlegroups.com>
	<acq57pnf.fsf@python.net>
	<1108604319.052270.170430@l41g2000cwc.googlegroups.com>
	<jOCdnY_u55-Ta47fRVn-3w@powergate.ca>
	<1108621701.919626.136070@o13g2000cwo.googlegroups.com>
Message-ID: <As6dnbvPDqwbEonfRVn-og@powergate.ca>

pipedreamergrey at gmail.com wrote:
> (Most recent call last):
> C:\Documents and Settings\Gateway User\ Desktop\custdb\setup.py", 
 > line 1, name = "custdb", 'setup' is not defined
> 
> There may be a single word infront of 'setup' on the fourth line, it
> scramble on my screen because I have to use a screen capture to read
> the error (it pops up for just a second before the window shuts down.

That's because you're not running it from a command prompt.
Please open a command prompt (Start Menu, select "Run",
type "cmd.exe" and ENTER, then type the following line
to get to the folder with the script:

cd "c:\documents and settings\gateway user\desktop\custdb"

(If that doesn't work, perhaps there is really a space in
front of "desktop" as you show above...)

Once you're there, you should be able to run the script
directly just by typing its name plus the arguments
required: "setup.py py2exe" (without the quotes).  If
you can get that far, you should have the full error
message in a form you can directly cut and paste.  If
it adds nothing over what you show above, however, then
I'm at a loss because I can't see how your script could
possibly have generated that error...

> Here's the full setup.py script I ran to get the error:
> 
> from distutils.core import setup
> import py2exe
> 
> setup( name = "custdb",
>        console = ["custdb.py"],
>        data_files = [ (".", ["custdb.ini", "custdb.de.rsrc.py"
> "custdb.rsrc.py", "customerdata.csv"]) ]

This makes no sense to me, given the error message.  The error
reports that it fails on "line 1", yet line 1 in the above
is the import statement, and doesn't have name = "custdb" on
it as the error reports.

-Peter


From grante at visi.com  Mon Feb 21 21:47:48 2005
From: grante at visi.com (Grant Edwards)
Date: 22 Feb 2005 02:47:48 GMT
Subject: How to write a ping client
References: <1109039706.092671.137360@f14g2000cwb.googlegroups.com>
Message-ID: <421a9d54$0$44652$a1866201@visi.com>

On 2005-02-22, Harlin <harlinseritt at yahoo.com> wrote:

> Is there a way to write a ping client? 
[...]

http://www.google.com/search?q=python+icmp+ping

-- 
Grant Edwards                   grante             Yow!  I have the power
                                  at               to HALT PRODUCTION on all
                               visi.com            TEENAGE SEX COMEDIES!!


From martin at v.loewis.de  Thu Feb 10 15:24:58 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 10 Feb 2005 21:24:58 +0100
Subject: Is this a bug? BOM decoded with UTF8
In-Reply-To: <epMOd.357$7m.215@read3.inet.fi>
References: <epMOd.357$7m.215@read3.inet.fi>
Message-ID: <420bc317$0$4925$9b622d9e@news.freenet.de>

pekka niiranen wrote:
> I have two files "my.utf8" and "my.utf16" which
> both contain BOM and two "a" characters.
> 
> Contents of "my.utf8" in HEX:
>     EFBBBF6161
> 
> Contents of "my.utf16" in HEX:
>     FEFF6161

This is not true: this byte string does not denote
two "a" characters. Instead, it is a single character
U+6161.

> Is there a trick to read UTF8 encoded file with BOM not decoded?

It's very easy: just drop the first character if it is the BOM.

The UTF-8 codec will never do this on its own.

Regards,
Martin


From abuse at solumslekt.org  Wed Feb 23 10:35:50 2005
From: abuse at solumslekt.org (Leif B. Kristensen)
Date: Wed, 23 Feb 2005 16:35:50 +0100
Subject: running a shell command from a python program
References: <1109170831.815278.243270@f14g2000cwb.googlegroups.com>
Message-ID: <qp1Td.10037$IW4.253104@news2.e.nsc.no>

Sandman wrote:

> How would I run a shell command in Python?
> 
> Here is what I want to do:
> I want to run a shell command that outputs some stuff, save it into a
> list and do stuff with the contents of that list.

There's a Python Cookbook example that should fit nicely with what
you're trying to do here:

<http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52296>
-- 
Leif Biberg Kristensen


From deetsNOSPAM at web.de  Tue Feb 15 06:19:18 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Tue, 15 Feb 2005 12:19:18 +0100
Subject: Delivery Status Notification (Failure)
References: <614c778e.0502150307.496b97d6@posting.google.com>
Message-ID: <37e45cF5ah0koU1@individual.net>

administrata wrote:

> Hello. I was about to use tutor-mailing But, When i send to
> tutor at python.org

That just means that somebody subscribed to that list isn't reachable.
Ignore it.

> Plz HELP me;

Please start talking english. This is no l337-script-kiddie forum.

-- 
Regards,

Diez B. Roggisch


From leo at lspace.org  Wed Feb 16 18:29:30 2005
From: leo at lspace.org (Leo Breebaart)
Date: 16 Feb 2005 23:29:30 GMT
Subject: Why doesn't join() call str() on its arguments?
References: <mailman.2728.1108595128.22381.python-list@python.org>
Message-ID: <37i3aqF5dpst6U2@individual.net>


"Delaney, Timothy C (Timothy)" <tdelaney at avaya.com> writes:

> John Roth wrote:
> 
> > result = "".join([str(x) for x in list])
> 
> As of 2.4, you should use a generator expression here instead (unless
> you require backwards-compatibility with 2.3).
> 
>     result = ''.join(str(x) for x in iterable)
> 
> Easier to read, more memory-efficient, potentially faster (depending on
> performance characteristics of building large lists).

Stop me if I sound too whiney, but in my original post that
started this thread just a couple of hours ago, I did in fact get
this right, so I'm not entirely sure who the two of you are
actually talking to...

-- 
Leo Breebaart  <leo at lspace.org>


From rkern at ucsd.edu  Tue Feb 15 03:08:12 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Tue, 15 Feb 2005 00:08:12 -0800
Subject: calculate with date
In-Reply-To: <opsl8dlkqreybkhy@ze14.gg>
References: <opsl8dlkqreybkhy@ze14.gg>
Message-ID: <cusale$423$1@news1.ucsd.edu>

Detlef Jockheck wrote:
> Hi,
> 
> I have a date-string given in format "dd.mm.yyyy". Now I would like to 
> add  100 days. How can this be solved in python?

import datetime

def add100days(datestring):
     day, month, year = [int(x) for x in datestring.split('.')]
     date0 = datetime.date(year, month, day)
     date1 = date0 + datetime.timedelta(days=100)
     newdatestring = '%.2d.%.2d.%.4d' % (date1.day, date1.month,
         date1.year)
     return newdatestring


You may want to do the details differently, but datetime is the module 
that you want to use.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From ville at spammers.com  Fri Feb 25 05:38:53 2005
From: ville at spammers.com (Ville Vainio)
Date: 25 Feb 2005 12:38:53 +0200
Subject: wanted: C++ parser written in Python
References: <mukr11t39khpd8od53im9jic3s6qjcl3j2@4ax.com>
	<3881hvF5jg6qrU1@individual.net>
	<91ut11pi7s6acj2pthj2crnh6n96o6raqs@4ax.com>
Message-ID: <du7k6ow7wle.fsf@amadeus.cc.tut.fi>

>>>>> "Franz" == Franz Steinhaeusler <franz.steinhaeusler at utanet.at> writes:

    Franz> Thank you, but it is too big.

    Franz> Anyway:

    Franz> I'm looking for some (simple) "rules" to parse (regex) and
    Franz> try to implement myself, if nothing is available.

Check out

http://pyparsing.sourceforge.net/

Before you start implementing one yourself. Regexp solution would
probably be a bit flakier. And do share your results when you get
some; I'm in need of a c++ parser myself.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From kartic.krishnamurthy at gmail.com  Tue Feb  1 10:46:32 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 1 Feb 2005 07:46:32 -0800
Subject: Building Python with Tcl/Tk on Cygwin_NT-5.1
In-Reply-To: <mailman.1685.1107253867.22381.python-list@python.org>
References: <mailman.1685.1107253867.22381.python-list@python.org>
Message-ID: <1107272792.265716.240000@z14g2000cwz.googlegroups.com>

Dean,

It has been quite sometime since I did that. I had installed Tcl/TK in
a non-standard location on my Freebsd box.

So, for Python to compile _tkinter,  in the configure script I passed
the location of the Tcl/Tk includes and libs. So, you will have to find
out where in the Cygwin tree the tcl includes and libraries are
installed.

On my Freebsd box, I did:
CFLAGS="-I/usr/local/tcl/include" \ # that is a - capital i
LDFLAGS="-L/usr/local/tcl/lib" \
./configure \
.... rest of configure options.

(put this in something like do-conf) and at the prompt type sh do-conf.

OR

you can use the --with-libs='lib1 ...'  option for the configure
script. You will to give the path to your TCL libraries against this
option.

Do a configure --help to see the available configure options with some
help strings.

But like Jason mentioned, why don't you use the stock Python install
that comes with Cygwin; it is tkinter enabled and works just fine?
(unless you have a compelling reason to install from source)
Thanks,
--Kartic



From tundra at tundraware.com  Thu Feb  3 20:38:13 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 03 Feb 2005 20:38:13 EST
Subject: OT: why are LAMP sites slow?
In-Reply-To: <7xis59qgaz.fsf@ruckus.brouhaha.com>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<mailman.1857.1107479377.22381.python-list@python.org>
	<7xis59qgaz.fsf@ruckus.brouhaha.com>
Message-ID: <280bd2-1ad.ln1@eskimo.tundraware.com>

Paul Rubin wrote:

> Simon Wittber <simonwittber at gmail.com> writes:
> 
>>Slow is such an ambiguous term. Do you mean the pages are slow to
>>render in a browser, or slow to be fetched from the server, or the
>>server is slow to respond to requests? What is slow?
> 
> 
> The server is slow to respond to requests.  Browser rendering is
> independent of the server architecture and "slow to be fetched from
> the server" sounds like it means low network speed.  I'm talking about
> the very familiar experience of clicking a link and then waiting,
> waiting, waiting for the page to load.  You rarely see that happen
> with Ebay or Google.  It happens all the time with Wikipedia.

This has a lot to do with the latency and speed of the connecting
network. Sites like Ebay, Google, and Amazon are connected
to internet backbone nodes (for speed) and are cached throughout
the network using things like Akami (to reduce latency)...

-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From jfabiani at yolo.com  Sun Feb 13 12:57:34 2005
From: jfabiani at yolo.com (John Fabiani)
Date: Sun, 13 Feb 2005 17:57:34 GMT
Subject: Second posting - Howto connect to MsSQL
Message-ID: <iyMPd.4612$ZZ.1645@newssvr23.news.prodigy.net>

Hi,
Since this is (sort of) my second request it must not be an easy solution. 
Are there others using Python to connect MsSQL?  At the moment I'd accept
even a windows solution - although, I'm looking for a Linux solution.

John


From deetsNOSPAM at web.de  Fri Feb 11 09:08:51 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 11 Feb 2005 15:08:51 +0100
Subject: Is this a bug? BOM decoded with UTF8
References: <epMOd.357$7m.215@read3.inet.fi>	<420bc317$0$4925$9b622d9e@news.freenet.de>	<KT1Pd.641$gz1.258@read3.inet.fi>
	<373p8vF57039vU1@individual.net>
	<mailman.2392.1108129900.22381.python-list@python.org>
Message-ID: <373sj3F590j6iU1@individual.net>

> What are you talking about? The BOM and UTF-16 go hand-and-hand.
> Without a Byte Order Mark, you can't unambiguosly determine whether big
> or little endian UTF-16 was used. If, for example, you came across a
> UTF-16 text file containing this hexidecimal data: 2200> 
> what would you  assume? That is is quote character in little-endian
> format or that it is a for-all symbol in big-endian format?

I'm well aware of the need of a bom for fixed-size multibyte-characters like
utf16.

But I don't see the need for that on an utf-8 byte sequence, and I first
encountered that in MS tool output - can't remember when and what exactly
that was. And I have to confess that I attributed that as a stupidity from
MS. But according to the FAQ you mentioned, it is apparently legal in utf-8
too. Neverless the FAQ states:

"""
Q: Can a UTF-8 data stream contain the BOM character (in UTF-8 form)? If
yes, then can I still assume the remaining UTF-8 bytes are in big-endian
order?


A: Yes, UTF-8 can contain a BOM. However, it makes no difference as to the
endianness of the byte stream. UTF-8 always has the same byte order. An
initial BOM is only used as a signature ? an indication that an otherwise
unmarked text file is in UTF-8. Note that some recipients of UTF-8 encoded
data do not expect a BOM. Where UTF-8 is used transparently in 8-bit
environments, the use of a BOM will interfere with any protocol or file
format that expects specific ASCII characters at the beginning, such as the
use of "#!" of at the beginning of Unix shell scripts. [AF] & [MD]
"""

So they admit that it makes no sense - especially as decoding a utf-8 string
given any 8-bit encoding like latin1 will succeed.

So in the end, I stand corrected. But I still think its crap - But not MS
crap. :)

-- 
Regards,

Diez B. Roggisch


From Dennis.Benzinger at gmx.net  Wed Feb 16 16:52:16 2005
From: Dennis.Benzinger at gmx.net (Dennis Benzinger)
Date: Wed, 16 Feb 2005 22:52:16 +0100
Subject: Multiple initialization methods?
In-Reply-To: <1108589491.301007.174370@z14g2000cwz.googlegroups.com>
References: <1108589491.301007.174370@z14g2000cwz.googlegroups.com>
Message-ID: <4213c08b$1@news.uni-ulm.de>

alex wrote:
> Hi,
> 
> it is possible to define multiple initialization methods so that the
> method is used that fits?

No, there is no overloading in Python.

> I am thinking of something like this:
> 
>   def __init__(self, par1, par2):
>     self.init(par1, par2);
> 
>   def __init__(self, par1):
>     self.init(par1, None)
> 
>   def init(self, par1, par2):
>      ...
>      ...
> 
> So if the call is with one parameter only the second class is executed
> (calling the 'init' method with the second parameter set to 'None' or
> whatever. But this example does not work. 
> 
> How to get it work?
> 
> Alex
> 

Use a default argument for par2 and check for that in your function:

def __init__(self, par1, par2=None):
    # do something with par1

    if par2 is None:
        print "par2 was not given!"
    else:
        print "par2 is", par2


Read more in the FAQ:
http://www.python.org/doc/faq/programming.html#how-can-i-overload-constructors-or-methods-in-python
or in the tutorial:
http://docs.python.org/tut/node6.html#SECTION006710000000000000000


Bye,
Dennis


From irmen.NOSPAM at xs4all.nl  Sat Feb 12 07:07:35 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sat, 12 Feb 2005 13:07:35 +0100
Subject: Web interface GUI??
In-Reply-To: <420deeea$0$19443$8fcfb975@news.wanadoo.fr>
References: <420deeea$0$19443$8fcfb975@news.wanadoo.fr>
Message-ID: <420df186$0$28979$e4fe514c@news.xs4all.nl>

Luc wrote:

> So I am looking for another solution with a web interface that should work
> with linux and windows XP.
> I had a look to zope but was afraid with the complexity and debug
> difficulties.
> Are there some other solutions?

Yes. A lot: http://www.python.org/moin/WebProgramming
I know someone who successfully created a web application
that runs from CD-ROM, using Snakelets. So you may want
to have a look at that one first, because this is quite
similar to what you want to do, right?
Then again I'm biased ofcourse.
Just have a quick look at the available libraries and
decide which one fits your needs most.

--Irmen


From mwm at mired.org  Mon Feb 14 17:28:25 2005
From: mwm at mired.org (Mike Meyer)
Date: Mon, 14 Feb 2005 16:28:25 -0600
Subject: Kill GIL
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<868y5t6sal.fsf@guru.mired.org>
	<cumoue$9ur$1@panix2.panix.com> <86sm405d38.fsf@guru.mired.org>
	<cuospv$lfn$1@panix2.panix.com>
Message-ID: <86y8dqixo6.fsf@guru.mired.org>

aahz at pythoncraft.com (Aahz) writes:

> (Have you
> actually written any threaded applications in Python?)

Yes. Have you ever asked a polite question?

     <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From aleaxit at yahoo.com  Sat Feb  5 05:37:10 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 5 Feb 2005 11:37:10 +0100
Subject: a type without a __mro__?
Message-ID: <1grid1l.7goks6hh1l6yN%aleaxit@yahoo.com>

Can anybody suggest where to find (within the standard library) or how
to easily make (e.g. in a C extension) a type without a __mro__, except
for those (such as types.InstanceType) which are explicitly recorded in
the dispatch table copy._deepcopy_dispatch...?

Weird request, I know, so let me explain.  There's a bug in the
forthcoming 2.3.5's copy.py which can be tickled only by such a type.

Fixing the bug is trivially easy (I'll just use inspect.getmro(cls)
instead of cls.__mro__), but I also want to add to test_copy.py a unit
test that tickles the bug, rather than just commit an ``untested fix''.

I'm stumped at finding a type that's suitable for reproducing the bug;
I've asked the submitter of the original bug report (which comes up with
Zope and some specific application -- unsuitable for a core python unit
test, sigh), I've asked on python-dev, I've even IM'd a couple of
Python-guru friends, but the friends are equally stumped and I'm getting
no answers on python-dev nor from the submitter of the bug report.  So,
I thought I'd turn to the collective ingenuity of comp.lang.python...
thanks in advance for any help!


Alex


From h_stovold at hotmail.com  Sat Feb 12 23:47:25 2005
From: h_stovold at hotmail.com (Heather Stovold)
Date: Sat, 12 Feb 2005 22:47:25 -0600
Subject: Considering python - have a few questions.
Message-ID: <eZAPd.21496$Ka6.148459@news1.mts.net>

Hi all...

I am looking at writing a little program for my own use, and probably for a
bunch of other people too, and I am trying to decide what would be the best
language to use.

I am a "retired" programmer, that started in the DOS world.  (Well, I guess
I started pre-DOS...).  I learned C++ (for DOS), and Pascal (for DOS) when I
was in school - and programmed for several years in Basic.  (Ok - it wasn't
my choice - but it was what I was hired to program in - and each single-user
license was around $7,000 - so who was I to argue!)   I later did some stuff
in Visual Basic, and did some OOP in it.

HOWEVER - I have not programmed a single darned thing for over 5 years.
And although I do remember how to program in general, I don't seem to
remember Visual Basic that well...  so I'm looking around.  (After all, If
I'm going to have to relearn a language - might as well be worth while!)

I am wondering how hard it is to do what I want in python, however.

I need to make a GUI interface.  Some of the screens need to be dynamically
created, with the screen information in a database. Included in the database
will be pictures (.gif or .jpg) that need to be displayed.  A second
database would hold the user's data.   I would also need to be able to print
reports made in a similar fashion.

I would want the program to run in Windows for sure.  If it could work on a
Mac and other systems, that would be a plus.  I would really love it to be
able to also be able to be run on the internet (allowing more than one
person access to the data), but I've never done anything other than basic
web pages with a web page editor (dreamweaver.)

btw - I have the database designed (and the program info database filled) in
Access....

I don't mind working hard to learn how to do it....   I just want to know if
Python is a good choice or not!

Thanks for your patience!






From ncoghlan at iinet.net.au  Tue Feb  1 22:03:25 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Wed, 02 Feb 2005 13:03:25 +1000
Subject: test_socket.py failure
In-Reply-To: <ctmpr3025eh@news2.newsguy.com>
References: <ctinqv0c1a@news4.newsguy.com>	<mailman.1630.1107173295.22381.python-list@python.org>
	<ctmpr3025eh@news2.newsguy.com>
Message-ID: <420042FD.4020202@iinet.net.au>

x2164 at mailcity.com wrote:
>      At the interactive python prompt i did/got the following:
> 
> 	bash-2.04$ ./python 
> 	Python 2.4 (#1, Jan 29 2005, 10:31:35) 
> 	[GCC 2.95.3 20010315 (release)] on linux2
> 	Type "help", "copyright", "credits" or "license" for 
> 	   more information.
> 	>>> import socket
> 	>>> socket.getservbyname('daytime', 'tcp')
> 	13
> 	
> 	 # The 13 looks ok but look what happen 
> 	 # when i asked only for the service, like
> 	 # the line that fails in test_socket.
> 	
> 	>>> socket.getservbyname('daytime')       
> 	Traceback (most recent call last):
> 	  File "<stdin>", line 1, in ?
> 	socket.error: service/proto not found
> 	>>>

Hmm, when the second argument is omitted, the system call looks like:

getservbyname("daytime", NULL);

Based on "man getservbyname" on my Linux PC, that should give the behaviour we 
want - any protocol will match.

However:

Linux 2.6.4-52-default (Suse 9.1)
Glibc 2.3.3
gcc   3.3.3

So it may be that your older platform doesn't have this behaviour - I'd be very 
interested in what 'man getservbyname' has to say.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From lars-www at lycos.com  Thu Feb 17 04:25:40 2005
From: lars-www at lycos.com (Lars)
Date: 17 Feb 2005 01:25:40 -0800
Subject: Stable GUI
In-Reply-To: <1108569376.721830.67370@o13g2000cwo.googlegroups.com>
References: <c0e7fd79.0502160619.565eb40e@posting.google.com>
	<1108564589.069982.71680@o13g2000cwo.googlegroups.com>
	<1108569376.721830.67370@o13g2000cwo.googlegroups.com>
Message-ID: <1108632340.607048.119820@l41g2000cwc.googlegroups.com>

I've used Tkinter quite extensively for various tools, but never for
anything big. I believe it will work nicely for a data input type of
application. I don't  know if you'll experience significant "lag" when
updating app-windows on old pentiums, but it shouldn't be a problem.
Mind you, the machines should have a decent amount of ram (I guess
around 128 mb and upwards is reasonable).
The only problem I've ever encountered was with updating Tk widgets
from threads in a threaded app - it won't work. The solution was
nothing worse than using an output queue, and having an event check the
output buffer every second or so.

The Tcl/TK crowd probably have more extensive experience with using Tk
and Tix for bigger long running apps, maybe you can ask them for more
info?

Good luck with your app!
Lars



From markus_wankusGETRIDOFALLCAPS at hotmail.com  Thu Feb  3 22:46:24 2005
From: markus_wankusGETRIDOFALLCAPS at hotmail.com (Markus Wankus)
Date: Thu, 03 Feb 2005 22:46:24 -0500
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
In-Reply-To: <pan.2005.02.03.19.10.39.349763@jerf.org>
References: <ctsjmg$75p$1@usenet.otenet.gr>
	<pan.2005.02.03.19.10.39.349763@jerf.org>
Message-ID: <ueCMd.22177$Ck1.1629547@news20.bellglobal.com>

OH GOD!  I cannot believe Ilias has shown up here...

Google his name - he has been banned from Netbeans and Eclipse (and 
Hibernate, and others...) for good reason.  Can you imagine how much of 
a Troll you need to be to *actually* get "banned" from the newsgroups of 
open source projects such as those?

I realize your admirable intentions and the fact that you are simply 
trying to help (the beauty of this community), but I beg you all 
now...PLEASE...do not feed this troll.  Any responses to his posts will 
simply snowball into the biggest waste of time and energy this newsgroup 
has ever seen.    I'll let Google fill in the rest of the picture.  You 
can decide whether or not you want to respond to his posts.

Markus.

Jeremy Bowers wrote:

> On Thu, 03 Feb 2005 09:26:08 +0200, Ilias Lazaridis wrote:
> 
>>My question is essentially:
>>
>>How many of those constructs are already supported by python (and the 
>>surrounding open-source-projects):
>>
>>http://lazaridis.com/case/stack/index.html
> 
> 
> This post is hard to follow, but I'm going to assume this is the core
> question, as it is labelled as such.
> 
> The first thing that leaps to mind is that you need to play with Python
> for a bit to get a full analysis of it. Due to the nature of Python, some
> of the things you have in that list don't really apply. 
> 
> The most obvious example of this is "code generation": Assuming you mean
> what I think you mean, the sort of thing you have in the C++ or Java world
> where you click a couple of boxes, push "next" a few times, and have
> several hundred kilobytes of impenetrable source code pop out as your
> project's "framework", it doesn't generally apply. In Python, you can
> actually write frameworks that can be made to do useful things in a small
> handful of lines.
> 
> For a good example of that, I'd recommend the Twisted tutorial:
> http://twistedmatrix.com/documents/current/howto/tutorial/index . In
> Python, if a framework makes you write reams of boilerplate... it's
> probably because someone just came from Java and isn't thinking in Python
> yet. :-) Code generation in Python is generally a non-starter. (Few rare
> counterexamples, but it's nothing like the Necessary Crutch it is in the
> C++ world.) Generally, every line in that Twisted tutorial, even in the
> final program, is *doing something*, not satisfying the framework with
> necessary boilerplate.
> 
> As for the rest of your requirements, you have specified your "technology
> stack" in terms of *goals*, not capabilities, so for quite a lot of them,
> there is no answer except, "Yes, Python can do that, and generally easier
> than most anything else". For instance, "Use of metadata within the design
> (on text level [code file])" can mean a thousand things. For what it's
> worth, Python tends to make it so easy I do it all the time, but for any
> given way you mean it, I can't promise there exists a pre-rolled framework
> for you.
> 
> So I can only speak generally. Given your list, you may find that Python
> is weak in the "graphical programming" department; drop-and-drop GUI
> generation isn't as well-tuned as VB. (I, for one, consider that
> development methodology toxic and actively dangerous, but I can understand
> why you miss it.)
> 
> Skipping down to your evaluation sequence:
> 
> * Create a class: Well, I'll show you this one:
> 
> class Something: pass
> 
> There, a class.
> 
> * Simple GUI: You may wish to check out Boa Constructor, as the closest
> thing to the GUI generator you probably want. There are at least 3 major
> viable GUI toolkits for Python and several other minor (but still capable)
> ones.
> 
> * Embedded DBs: I don't know, Google for your embedded DB name + Python.
> Failing that, there are several ways to wrap your embedded DB such that a
> Python program can use it.
> 
> * Web GUI: There are more Python web frameworks than you can shake a stick
> at, and I don't mean "some guys hacked together templating system" either;
> there are a lot of very mature systems out there, expressing a lot of
> different philosophies. Given some of your other requirements, for a
> web-based application I'd recommend examining Zope.
> 
> * Deployment: I don't generally have enough problems with this to be worth
> thinking about. I don't know what the state of the remote debugging is on
> Python; Google "remote debugging Python".
> 
> * For your "complex updates", I see two distinct things there; half of the
> depend on the database, not Python. For the other half, it depends on if
> you mean "while the program is still running". If so, they are
> challenging. If not, they are trivial.
> 
> * I'd recommend adding "testability" to your stack, and refer you to the
> "unittest" module; others can suggest their preferred testing modules, but
> I tend to stick with that as the general framework is available in a lot
> of languages that I use. If by evolutive development you are including the
> ideas behind "agile software development" (hard to tell if you mean that,
> or a community open to change*)
> 
> Based on what I see here, I have two basic comments. First, yes, Python is
> probably as close as you are going to get in an existing system to what I
> think you are looking for. It isn't perfect, but you will also be able to
> reasonably extend it for your needs. Second, Python has a different
> philosophy; you recognize the need for a different philosophy and I
> extremely strongly suggest that you take the time with Python to sort out
> what you truly need from what you think you need due to still thinking
> with your old philosophy. (For example, given my aforementioned
> reasons why code generation isn't an issue in Python, I strongly suggest
> you embrace Python and give it a chance, rather than force 'code
> generation' on top of it.)
> 
> You've got some exciting learning to do, and some interesting philosophy
> shifts to absorb, but I think you'll find, as a lot of use have, that even
> if it isn't perfect it's a helluva lot better than Java!
> 
> *: Community open to change: One caveat, from what I've seen when other
> people talk about this. The Python community is open to change, but it is
> still a meritocracy, and you will still need to convince others your
> change is good. For example, getting something into the standard library
> is not something that everybody does routinely. But as it is open source,
> if you want to take responsibility for your changes, you can do as you
> like. I *think*, based on your reading, that you are focussing on the
> latter, in which case you are OK. But do not expect to be able to dump
> things off onto "the Python community". 
> 
> Also, not getting into the standard library isn't that big a deal anyhow;
> a lot of very powerful and popular frameworks and modules don't go in,
> often because they conflict with the needs of a Python release (slow rate
> of change, mature interface, general utility, need to prevent a Python
> download ballooning to 250 MB, etc.). 


From Serge.Orlov at gmail.com  Thu Feb 10 14:49:33 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: 10 Feb 2005 11:49:33 -0800
Subject: sre is broken in SuSE 9.2
In-Reply-To: <cugc2v$i8u$1@swifty.westend.com>
References: <mailman.2299.1108029731.22381.python-list@python.org>
	<1108060527.378911.146240@o13g2000cwo.googlegroups.com>
	<cugc2v$i8u$1@swifty.westend.com>
Message-ID: <1108064973.719544.228970@z14g2000cwz.googlegroups.com>

Peter Maas wrote:
> Serge Orlov schrieb:
> > Denis S. Otkidach wrote:
> > To summarize the discussion: either it's a bug in glibc or there is
an
> > option to specify modern POSIX locale. POSIX locale consist of
> > characters from the portable character set, unicode is certainly
> > portable.
>
> What about the environment variable LANG? I have SuSE 9.1 and
> LANG = de_DE.UTF-8. Your example is running well on my computer.

This thread is about problems only with LANG=C or LANG=POSIX, it's not
about other locales. Other locales are working as expected.

  Serge.



From BOOGIEMANPN at YAHOO.COM  Fri Feb 11 11:37:19 2005
From: BOOGIEMANPN at YAHOO.COM (BOOGIEMAN)
Date: Fri, 11 Feb 2005 17:37:19 +0100
Subject: Alternative to raw_input ?
References: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>
	<mailman.2400.1108139722.22381.python-list@python.org>
Message-ID: <w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>

On Fri, 11 Feb 2005 16:35:19 +0000, Simon Brunning wrote:

> Err, why?

It looks to ugly this way. I want to press 
any key without ENTER to continue


From rnd at onego.ru  Sun Feb 20 16:23:16 2005
From: rnd at onego.ru (Roman Suzi)
Date: Mon, 21 Feb 2005 00:23:16 +0300 (MSK)
Subject: Bug in email package?
Message-ID: <Pine.LNX.4.62.0502210013060.27153@rnd.onego.ru>


I was playing with email package and discovrered this strange kind of 
behaviour:

>>> import email.Message
>>> m = email.Message.Message()
>>> m['a'] = '123'
>>> print m
>From nobody Mon Feb 21 00:12:27 2005
a: 123


>>> for i in m: print i
...
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "/usr/local/lib/python2.3/email/Message.py", line 304, in __getitem__
     return self.get(name)
   File "/usr/local/lib/python2.3/email/Message.py", line 370, in get
     name = name.lower()
AttributeError: 'int' object has no attribute 'lower'


I think that if any object (from standard library at least) doesn't support
iteration, it should clearly state so.

My guess is that 'for' causes the use of 'm[0]', which is (rightfully) an 
error...

Can this behaviour of email be considered a bug?
Is there a good case to iterate over something useful in a message?

P.S. rfc822 has the same behaviour, at least on Python 2.3


Sincerely yours, Roman Suzi
-- 
rnd at onego.ru =\= My AI powered by GNU/Linux RedHat 7.3


From mep_ at 163.com  Fri Feb 25 02:10:06 2005
From: mep_ at 163.com (mep)
Date: Fri, 25 Feb 2005 15:10:06 +0800
Subject: wanted: C++ parser written in Python
References: <mukr11t39khpd8od53im9jic3s6qjcl3j2@4ax.com>
Message-ID: <3881hvF5jg6qrU1@individual.net>

Try ANTLR with python code generation:
http://www.antlr.org/

And C++ grammers:
http://www.antlr.org/grammar/cpp

You can generate a c++ parser in python with the above.

-- 
Best Regards,
Wang Kebo

http://www.huihoo.org/~mep


"Franz Steinhaeusler" <franz.steinhaeusler at utanet.at> wrote in message
news:mukr11t39khpd8od53im9jic3s6qjcl3j2 at 4ax.com...
> Hello NG,
>
> has anyone written such a thing in python?
> Where could I look for?
>
> (I need it for an editor written in wxPython to display function names,
> include, global variables, classes, ... in a sidepanel).
>
> kind regards,
> -- 
> Franz Steinhaeusler




From mefjr75 at hotmail.com  Wed Feb  2 20:04:23 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 2 Feb 2005 17:04:23 -0800
Subject: global variables
In-Reply-To: <1107391350.933650.321440@z14g2000cwz.googlegroups.com>
References: <1107385488.822768.317250@l41g2000cwc.googlegroups.com>
	<1107388493.465599.140480@g14g2000cwa.googlegroups.com>
	<3YSdnYVEmOCW8pzfRVn-sg@comcast.com>
	<1107391350.933650.321440@z14g2000cwz.googlegroups.com>
Message-ID: <1107392092.290042.221600@c13g2000cwb.googlegroups.com>

Ok it has been a long day,
In my reply to Steven Bethard , Steve should read Steven ;)

M.E.Farmer



From bearophileHUGS at lycos.com  Tue Feb  8 14:52:18 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 8 Feb 2005 11:52:18 -0800
Subject: graph visualisation
In-Reply-To: <bb6Od.47135$Z14.32303@news.indigo.ie>
References: <MSGID_2=3A5025=2F3.131_420910b1@fidonet.org>
	<bb6Od.47135$Z14.32303@news.indigo.ie>
Message-ID: <1107892338.401405.248760@z14g2000cwz.googlegroups.com>

This isn't a visualisation routine, but it contains some of them, and
with few mod you can adapt them for your needs:

http://gato.sourceforge.net/

Gato - the Graph Animation Toolbox - is a software which visualizes
algorithms on graphs.

Bearophile



From aleaxit at yahoo.com  Wed Feb  9 18:16:06 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Thu, 10 Feb 2005 00:16:06 +0100
Subject: Vectors in Visual Python
References: <1107944975.498403.225950@f14g2000cwb.googlegroups.com>
	<pbvj01tiob4v5i6usnkr08j10s9koeh5kn@4ax.com>
	<mailman.2268.1107979243.22381.python-list@python.org>
Message-ID: <1grqr50.14xzvs31fk2crnN%aleaxit@yahoo.com>

Terry Reedy <tjreedy at udel.edu> wrote:

> I (and I believe Alex) object to name declaration *statements* and/or the
> strong typing of *names*.

I confirm that my key objection is to declarations in the strict sense:
thingies that aren't executable, but rather billets doux to the
compiler, for example to affect its treatment of barenames.

> I (and I believe Alex) approve of the strong typing of *objects*, which

Absolute and unqualified agreement on this point, yes.

> must somehow be indicated in the object creation *expression*.  This is
> absolutely fundamental to Python.  There are at least three ways to 
> indicate the desired object type: literal type, constuctor (and other
> function) identity, and constructor (and other function) arguments.

And yes to all of this, as well.


Alex


From eurleif at ecritters.biz  Sun Feb  6 03:07:43 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sun, 06 Feb 2005 03:07:43 -0500
Subject: Multiple constructors
In-Reply-To: <6SjNd.38337$K7.21639@fe2.news.blueyonder.co.uk>
References: <6SjNd.38337$K7.21639@fe2.news.blueyonder.co.uk>
Message-ID: <36m1bbF53tekaU1@individual.net>

Philip Smith wrote:
> I don't seem to be able to define multiple versions of __init__ in my matrix 
> class (ie to initialise either from a list of values or from 2 dimensions 
> (rows/columns)).

You could either use an if statement with *args:

class Matrix(object):
     def __init__(self, *args):
         if len(args) == 1:
             # Initialize from list of values
         elif len(args) == 2:
             # Initialize from rows/columns
         else:
             raise TypeError("Constructor accepts 1 or 2 arguments.")

Or with two different functions:

class Matrix(object):
     def __init__(self, values):
         # Initialize from a list of values

     @classmethod
     def from_pair(self, rows, columns):
         return Matrix([rows, columns]) # Or with the right argument


From __peter__ at web.de  Mon Feb  7 02:24:13 2005
From: __peter__ at web.de (Peter Otten)
Date: Mon, 07 Feb 2005 08:24:13 +0100
Subject: "Collapsing" a list into a list of changes
References: <dvOMd.33656$EG1.19314@lakeread04>
	<mailman.1905.1107543558.22381.python-list@python.org>
	<LYydnagbw4-vVZ7fRVn-pw@comcast.com>
	<mailman.2034.1107725421.22381.python-list@python.org>
Message-ID: <cu7532$er8$01$1@news.t-online.com>

Francis Girard wrote:

> This is a prefect use case for the good old "reduce" function:
> 
> --BEGIN SNAP
> 
> a_lst = [None,0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5]
> 
> def straightforward_collapse(lst):
> return?reduce(lambda?v,e:?v[-1]!=e?and?v+[e]?or?v,?lst[1:],?[lst[0]])
 
reduce() magically increases the number of function calls by len(a_list).
There will be no good use cases for reduce() until Python can inline
functions.

Apodictically Yours
Peter



From tchur at optushome.com.au  Fri Feb 18 01:43:19 2005
From: tchur at optushome.com.au (Tim Churches)
Date: Fri, 18 Feb 2005 17:43:19 +1100
Subject: Fuzzy matching of postal addresses
In-Reply-To: <1108682472.028307.92060@o13g2000cwo.googlegroups.com>
References: <mailman.875.1106093219.22381.python-list@python.org>
	<1108682472.028307.92060@o13g2000cwo.googlegroups.com>
Message-ID: <42158E87.8090502@optushome.com.au>

McBooCzech wrote:

>Tim,
>
>do you think Ferbel can parse properly with non English data-sets?
>
The official name for the project is "Febrl" (freely-extensible 
biomedical record linkage) but perhaps "Furball" would be better name, 
given its focus on fuzziness (if that is not a contradiction in terms). 
My cat could cough up a suitable graphical logo, no doubt.

> I
>mean do you think it will work properly with data they include non
>English characters as well? As we live in Europe, we have to solve such
>a problems here :)))) If the software needs some changes, I am ready,
>according to your suggestions, to try to do it.
>  
>
The underlying method (hidden Markov models) should work with any kind 
of data. If the non-English characters can be read as normal Python 
strings then it will definitely work. If you need to use Unicode 
strings, it may work, but that is not something we have tested - 
although it is on the TO-DO list. Peter Christen could comment further 
on that (off-line).  You would need to supply your own  tagging look-up 
tables of course, and bootstrap your own models as it unlikely that the 
sample models for Australian addresses will work well for Czech 
addresses. But none of that should be too hard.

Tim C



From qwweeeit at yahoo.it  Tue Feb 22 08:27:51 2005
From: qwweeeit at yahoo.it (qwweeeit)
Date: 22 Feb 2005 05:27:51 -0800
Subject: Flow chart (function tree) & cross references
Message-ID: <2ab23d7a.0502220527.5d5bba2d@posting.google.com>

Hi all,
I am developing in Python (as a GUI I choosed Qt).
To increase my expertise, besides reading manuals & tutorials, I am
studying a big program developed in the language of my choice, and
related with my project (to develop a card game).
For that reason I choosed PySol (also if the GUI part uses Tkinter and
not Qt).
PySol is made up from almost 100 python modules and for that reason
you need a mean to organize that. I developed some very small programs
to merge all together in one big listing, keeping the line numbering
of the individual modules (with an identification mark).
The line numbering is in hex to be able to use only 3 char (in hex you
can accomodate 4095 lines instead of only 999 in decimal).
As an example X03F means line 63 (0x3F in hex) of the program
identified by 'X'.

Does someone knows something about function tree generation and cross
references?
I have decided to develop these functionalities in python, but if
someone can help...


From alan.mcintyre at esrgtech.com  Fri Feb  4 14:25:53 2005
From: alan.mcintyre at esrgtech.com (Alan McIntyre)
Date: Fri, 04 Feb 2005 14:25:53 -0500
Subject: empty classes as c structs?
In-Reply-To: <mailman.1906.1107543562.22381.python-list@python.org>
References: <mailman.1906.1107543562.22381.python-list@python.org>
Message-ID: <6%PMd.33662$EG1.31801@lakeread04>

Christopher,

I've found myself doing the same thing.  You could do something like this:

blah = type('Struct', (), {})()
blah.some_field = x

I think I'd only do this if I needed to construct objects at runtime 
based on information that I don't have at compile time, since the two 
lines of code for your empty class would probably be more recognizable 
to more people.

If this usage of type() strikes anyone as inappropriate please let me 
know, because I really don't know. :)

Christopher J. Bottaro wrote:
> I find myself doing the following very often:
> 
> class Struct:
>         pass
> ...
> blah = Struct()
> blah.some_field = x
> blah.other_field = y
> ...
> 
> Is there a better way to do this?  Is this considered bad programming
> practice?  I don't like using tuples (or lists) because I'd rather use
> symbolic names, rather than numeric subscripts.  Also, I don't like having
> to declare the empty Struct class everytime I want to do this (which is
> very often).
> 
> Feedback is appreciated, thanks.
> 


From t-meyer at ihug.co.nz  Mon Feb 14 15:34:11 2005
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Tue, 15 Feb 2005 09:34:11 +1300
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E802107A93@its-xchg4.massey.ac.nz>
Message-ID: <ECBA357DDED63B4995F5C1F5CBE5B1E801DAFE77@its-xchg4.massey.ac.nz>

>> In addition, there are some unresolved licensing questions 
>> concerning the .NET runtime file for extensions (msvcr71.dll):
[...]
> msvcr71.dll is a redistributable for applications written using their 
> compiler. You can redistribute that.

If (and only if) you own a copy of the (non-free) Microsoft compiler, or are
a redistributer of another package that legitimately includes it.  This is
what the license states (the python-dev thread referenced earlier contains
links to the various license texts).

There are also other conditions, to do with what you are redistributing it
with (it can't be alone), and including a particular type of license with
your redistribution.  (It appears that Python 2.4 doesn't correctly follow
this at the moment, IIRC).

> If that answer is not good enough for you there is now a free
> version of Microsofts Visual Studio called Visual Studio Express
> (downloadable from the Microsoft's website). This 
> DLL is (to my understanding) part of Visual Studio 7.1 and 
> Visual Studio Express.

The licenses for the free compilers from Microsoft do *not* include
permission to redistribute any of the dlls, including msvcr71.dll.  So you
can get hold of it, but you cannot redistribute it.

> No licensing problem exists.

Not true.  The python-dev threads have much more detail.

> Microsoft will not get upset about msvcr71.dll being distributed.

This is possibly true.  But they do have the right to do so, and to take
legal action against people that don't follow the rules that they have laid
out.

=Tony.Meyer



From bdesth.quelquechose at free.quelquepart.fr  Thu Feb 10 12:57:50 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 10 Feb 2005 18:57:50 +0100
Subject: [N00B] What's %?
In-Reply-To: <614c778e.0502100938.6665cb52@posting.google.com>
References: <614c778e.0502100938.6665cb52@posting.google.com>
Message-ID: <420b9e39$0$29241$626a14ce@news.free.fr>

administrata a ?crit :
> Hi! it's been about a week learning python!
> I've read 'python programming for the absolute begginer'
> I don't understand about % like...
> 
> 107 % 4 = 3
> 7 % 3 = 1

it's the modulo operator (if you don't remember, the modulo is the 
remaining of the integer division, ie 5 % 2 = 1)

One of the most commun use is to test wether a number is odd or even:

any_even_number % 2 == 0
any_odd_number % 2 == 1


Note that the % operator is also used for string formating, ie:
"%d modulo %d = %d" % (5, 2, 1)
=> "5 modulo 2 = 1"

> Please help me...
HTH
Bruno


From cam.ac.uk at mh391.invalid  Mon Feb  7 20:49:06 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Tue, 08 Feb 2005 01:49:06 +0000
Subject: Dumb glob question
In-Reply-To: <Xns95F6C256797C0PDuncesomewhereinval@204.153.244.156>
References: <Xns95F6E0341861PDuncesomewhereinval@204.153.244.156>
	<1107770445.983406.64730@g14g2000cwa.googlegroups.com>
	<Xns95F6C256797C0PDuncesomewhereinval@204.153.244.156>
Message-ID: <cu95qn$9ej$1@gemini.csx.cam.ac.uk>

Python Dunce wrote:

> So if I happen 
> to be processing 'foo [bar].par2'
> 
> glob.glob(filename[:-5]+'.*par2')
> 
> doesn't return anything.  Using win32api.FindFiles(filename[:-5]+'.*par2') 
> works perfectly, but I don't want to rely on win32api functions.  I hope 
> that made more sense :).

If you look in the source for glob.py, you will find that it calls the
fnmatch module, and this is the docstring for fnmatch.translate():

     """Translate a shell PATTERN to a regular expression.

     There is no way to quote meta-characters.
     """

So you cannot do what you want with glob.

You can replace [] with ? in your glob string, if you are sure that
there won't be other characters there. That's a bit of a hack, and I
wouldn't do it.

In my mind it would probably be best to do:

re_vol = re.compile(re.escape(startpart) + ".*vol.*")
lst = [filename for filename in os.listdir(".") if re_vol.match(filename)]

I changed "list" to "lst" because the former shadows a built-in.
-- 
Michael Hoffman


From steven.bethard at gmail.com  Sun Feb  6 15:08:32 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 06 Feb 2005 13:08:32 -0700
Subject: remove duplicates from list *preserving order*
In-Reply-To: <mailman.2030.1107719436.22381.python-list@python.org>
References: <BfmdnTjWquaJEZ_fRVn-3A@comcast.com>
	<mailman.2030.1107719436.22381.python-list@python.org>
Message-ID: <yZOdnSQV0umm5JvfRVn-vQ@comcast.com>

Francis Girard wrote:
> I think your last solution is not good unless your "list" is sorted (in which 
> case the solution is trivial) since you certainly do have to see all the 
> elements in the list before deciding that a given element is not a duplicate. 
> You have to exhaust the iteratable before yielding anything.

I don't follow.  The first time I see an element, it is not a duplicate, 
so I yield it.  After that, the element should show up in the 'seen' 
list, which means I won't yield any of the remaining equivalent 
elements.  Could you explain your logic here?

Steve


From http  Fri Feb 18 05:30:08 2005
From: http (Paul Rubin)
Date: 18 Feb 2005 02:30:08 -0800
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<4214f9ba$0$832$8fcfb975@news.wanadoo.fr>
	<mailman.2774.1108674135.22381.python-list@python.org>
	<7xr7jezxlh.fsf@ruckus.brouhaha.com>
	<42158bf1$0$6624$8fcfb975@news.wanadoo.fr>
Message-ID: <7xy8dmp3db.fsf@ruckus.brouhaha.com>

Pierre Quentel <quentel.pierre at wanadoo.fr> writes:
> Even if the 12 requests occur in the same 5 minutes, the time needed
> for a read or write operation on a small base of any kind (flat file,
> dbm, shelve, etc) is so small that the probability of concurrence is
> very close to zero

I prefer "equal to zero" over "close to zero".  Also, there are times
when the server is heavily loaded, and any file operation can take a
long time.

> If you still want to avoid it, you'll have to pay some price. The most
> simple and portable is a client/server mode, as suggested for
> KirbyBase for instance. Yes, you have to run the server 24 hours a
> day, but you're already running the web server 24/7 anyway

If I have to run a db server 24/7, that's not simple or portable.
There's lots of hosting environments where that's plain not permitted.
Using file locks is much simpler and more portable.  The penalty is
that I can only handle one request at a time, but as mentioned, this
is for a low-usage app, so that serialization is ok.


From skip at pobox.com  Mon Feb  7 19:27:27 2005
From: skip at pobox.com (Skip Montanaro)
Date: Mon, 7 Feb 2005 18:27:27 -0600
Subject: negative integer division
In-Reply-To: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
References: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
Message-ID: <16904.1903.694341.423604@montanaro.dyndns.org>


    Imbaud> integer division and modulo gives different results in c and
    Imbaud> python, when negative numbers are involved. 

http://www.python.org/doc/faq/programming.html#why-does-22-10-return-3

Skip


From aleaxit at yahoo.com  Sun Feb  6 02:57:30 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 6 Feb 2005 08:57:30 +0100
Subject: a type without a __mro__?
References: <1grid1l.7goks6hh1l6yN%aleaxit@yahoo.com>
	<mailman.2009.1107671955.22381.python-list@python.org>
Message-ID: <1grk0ht.17vyhmyi04aifN%aleaxit@yahoo.com>

John Lenton <john at grulic.org.ar> wrote:

>     class C(type):
>       def __getattribute__(self, attr):
>         if attr == '__mro__':
>           raise AttributeError, "What, *me*, a __mro__? Nevah!"
>         return super(C, self).__getattribute__(attr)
> 
>     class D(object):
>       __metaclass__ = C

Yay -- *exactly*!!!  This simple trick reproduces the problem AND shows
that using inspect.getmro fixes it.  EXACTLY what we needed.  Thanks!!!
Now I can make a proper patch with unittest as well as the fix.


Alex


From just at xs4all.nl  Wed Feb  2 14:49:52 2005
From: just at xs4all.nl (Just)
Date: Wed, 02 Feb 2005 20:49:52 +0100
Subject: Hash of class from instance
References: <1107363342.531396.238350@g14g2000cwa.googlegroups.com>
	<Xns95F1AE4AFCC36duncanrcpcouk@127.0.0.1>
	<1107364617.371795.13740@l41g2000cwc.googlegroups.com>
	<36cj80F4ue5biU1@individual.net>
	<UqidnSE1QIXrtJzfRVn-ug@comcast.com>
	<1107373593.789905.168850@o13g2000cwo.googlegroups.com>
Message-ID: <just-AE1086.20495202022005@news1.news.xs4all.nl>

In article <1107373593.789905.168850 at o13g2000cwo.googlegroups.com>,
 "Joakim Storck" <joakim.storck at home.se> wrote:

> So I guess it might be a little bit less unwise to use id() instead
> then...

Why don't you use the class objects themselves as dict keys?

Just


From timr at probo.com  Mon Feb 21 01:21:27 2005
From: timr at probo.com (Tim Roberts)
Date: Sun, 20 Feb 2005 22:21:27 -0800
Subject: Bug in email package?
References: <mailman.2876.1108934604.22381.python-list@python.org>
Message-ID: <r7vi119jg8qie0b36repp796vqttuu507i@4ax.com>

Roman Suzi <rnd at onego.ru> wrote:
>
>I was playing with email package and discovrered this strange kind of 
>behaviour:
>
>>>> import email.Message
>>>> m = email.Message.Message()
>>>> m['a'] = '123'
>>>> print m
>>From nobody Mon Feb 21 00:12:27 2005
>a: 123
>
>>>> for i in m: print i
>...
>Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "/usr/local/lib/python2.3/email/Message.py", line 304, in __getitem__
>     return self.get(name)
>   File "/usr/local/lib/python2.3/email/Message.py", line 370, in get
>     name = name.lower()
>AttributeError: 'int' object has no attribute 'lower'

Intuitively, what did you expect this to do?  I don't see why a single
message should be iterable.

>I think that if any object (from standard library at least) doesn't support
>iteration, it should clearly state so.

That's going a bit far.  Iteration is a relatively new addition to Python.
Those classes that DO support iteration generally say so.  If it isn't
mentioned, you probaby shouldn't assume it.

>Can this behaviour of email be considered a bug?

Not in my opinion, no.

>Is there a good case to iterate over something useful in a message?

Well, if you don't have an answer to that question, then why would you
expect it to support iteration?

>P.S. rfc822 has the same behaviour, at least on Python 2.3

Again, I'm not sure what, intuitively, it would mean to iterate over an
rfc822 object.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From aleaxit at yahoo.com  Mon Feb  7 17:34:09 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 7 Feb 2005 23:34:09 +0100
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4207fd24@fidonet.org>
Message-ID: <1grmyg3.gfh8fj1rgs4kyN%aleaxit@yahoo.com>

Alexander Zatvornitskiy
<Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org> wrote:

> ?????? Alex!
> 
> 05 ??????? 2005 ? 17:00, Alex Martelli ? ????? ?????? ? All ?????:
>  >>  AM> The fact that in Python there are ONLY statements, NO
>  >>  AM> declarations,
>  >> What is "global"? Statement? Ok, I fill lack of "var" statement:)
>  AM> 'global' is an ugly wart,
> 
> Ok,
> ===
> def hi():
>   print "hello!"
> ===
> What is it? Statement or declaration?

Statement, obviously.

> After interpreter see this lines, it add
> information about function "hi" and it's body to his memory. Look at this:

Utterly false, like most of the unqualified, arrogant assertions you
keep making.

If and when the interpreter *EXECUTES* this *STATEMENT*, it binds or
rebinds name 'hi' in the current scope to a new function object -- just
like it would if the statement was, say, an assignment such as:

hi = new.function( ... )

with the appropriate arguments.  So, wondering if `def' "is a
declaration" is just about as stupid as wondering if an assignment
statement "is a declaration".

If the statement is not EXECUTED -- it does not suffice for it to be
merely *SEEN*, and your assertion about this is pure and unadulterated
POPPYCOCK, just like everything else you've been posting -- then no new
function object is made, and nothing is bound or re-bound to name 'hi'
in the current scope -- for 'def' just as for assignment, same thing.

If either statement is executed repeatedly, it builds a new function
object each time.  Not particularly meaningful when the function object
is trivial in this way, but if it was at all significant that would be
easy to verify -- just give the function some meaningfully mutable
values, such as argument defaults, and you can mutate each independent
function object separately at will.

'global', of course, is, alas, totally different -- which makes it a
wart.


>   var S
> Interpreter see this line and add information about variable S to the
> memory. I don't find big difference.

That's because you criticize what you completely fail to understand, and
your arrogance is such that you appear to not feel any need to perform a
modicum of research to avoid showing everybody your total ignorance
coupled with perfect willingness to spout about subjects you don't
grasp.

> By the way keyword "def" is as bad as "var", from your point of view? :)

Obviously not: 'def' is an excellent executable statement, just like
'class' or assignment.  'var' is (or rather, thank Guido, WOULD BE, if
Python developers were as incompetent and incapable as you) reason
enough to throw the language in the closest dustbin.

> Do you ever wrote programs for engineering calculations? Dozens of
variables

I was a senior developer for a major CAD SW house for 12 years, rising
to the rank of "senior software consultant".  Engineering enough for
you?

> with names like lambda_1, phi_k, epsilon, d2f_dx2, grad_z and so on. You
wrote

Not when _I_ wrote the code.  Clarity of naming is always important,
whether the computations are "engineering", "accounting", or whatever.

> You may say: give better names for your variables! Ha, I'am often don't
> understand that they mean! They are written for me by an engineer! He is

A good programmer understand what he or she IS programming.  I am not
surprised that you're used to coding without a glimmer of comprehension:
your readiness to publically post unfounded criticisms of a language
about which you're most obviously totally clueless clearly show that
doing without comprehending is something you're quite used to.

>  AM> wrong (just incredible, eh?!); others have gone away to find their
>  AM> bliss in Perl, PHP, or whatever -- good riddance, and don't let the
>  AM> door slam behind you as you go, please.
> 
> Don't be so ... I don't find the equivalent english word. Smth like: Take it
> more easy.

Don't have much experience with Southern Europeans of hot Latin blood,
hm?  We're ALWAYS intense about our feelings.  Of course, afterwards we
go bask in our delightful weather sipping our delightful cheap wines, so
there's no risk of our lives being stressful -- it must be very
different in the frozen North.


Alex


From cepl at surfbest.net  Wed Feb  9 16:38:56 2005
From: cepl at surfbest.net (Matej Cepl)
Date: 9 Feb 2005 13:38:56 -0800
Subject: Seekable output from ClientForm?
Message-ID: <35993bcb.0502091338.34591a7@posting.google.com>

Hi,

using python 2.3, ClientForm, and ClientCookie and I have this code:

opener = ClientCookie.build_opener(ClientCookie.HTTPRefererProcessor,
                                   ClientCookie.HTTPRefreshProcessor,
                                   ClientCookie.SeekableProcessor)

response = opener.open(lxURL)
forms = ClientForm.ParseResponse(response)
form = forms[0]
response.seek(0)

form['extpatid'] = MyNEUlogin
form['extpatpw'] = MyNEUpassword
formopener = form.click()

response2 = ClientCookie.urlopen(formopener)
guidednews = re.compile("s_guidednews.html")

response2.seek(0)
h = htmllib.HTMLParser(formatter.NullFormatter())
h.feed(response2.read())
print h.anchorlist

Unfortunately, it doesn't work, because response2 was created by
ClientForm and it is not seekable (apparently, I get "AttributeError:
addinfourl instance has no attribute 'seek'").

How to make output of ClientForm seekable, please?

Thanks a lot,

Matej


From marian at mba-software.de  Fri Feb 11 05:03:23 2005
From: marian at mba-software.de (=?ISO-8859-1?Q?Marian_Aldenh=F6vel?=)
Date: Fri, 11 Feb 2005 11:03:23 +0100
Subject: pyFMOD writing a callback function in Python
In-Reply-To: <brasff8a.fsf@python.net>
References: <370m88F525p5uU1@individual.net> <brasff8a.fsf@python.net>
Message-ID: <373e7eF55ufldU1@individual.net>

Hi,

> I was only able to find fmodapi374.zip (for windows), and that version doesn't 
 > seem to work with the pyFMOD release I found.

I found that too. But I could easily fix pyFMOD to use the FMOD 374. A few of
the exports have been renamed and parameters have been added to others. As the
total size of all parameters are encoded in the exported names all of these
errors are caught when importing so you can fix them one by one by looking it
up in the FMOD-Docs.

> All in all, it should look similar (I can't test it!) to this code:

I will try that when I get around to playing with the stuff again.

> You should also be aware that you have to keep the callback_function
> object alive *as long as the FMOD library is using it*!

While very obvious I am prone to forget that sometime :-).

Ciao, MM
-- 
Marian Aldenh?vel, Rosenhain 23, 53123 Bonn. +49 228 624013.
http://www.marian-aldenhoevel.de
"Wir brauchen keine Opposition, wir sind bereits Demokraten."


From pobrien at orbtech.com  Sun Feb 20 13:04:19 2005
From: pobrien at orbtech.com (Pat)
Date: 20 Feb 2005 10:04:19 -0800
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr> <cv7k8e$4pa$03$1@news.t-online.com>
	<cv7m2m$gp$1@usenet.otenet.gr> <cv7nh1$b57$03$1@news.t-online.com>
	<cv7r15$lhm$1@usenet.otenet.gr> <cv7vte$t1g$01$1@news.t-online.com>
	<1108849567.136885.141960@z14g2000cwz.googlegroups.com>
	<mailman.2859.1108907636.22381.python-list@python.org>
Message-ID: <1108922659.138898.205420@l41g2000cwc.googlegroups.com>

Nick Coghlan wrote:
> Pat wrote:
> > On Windows, most users are used to installing precompiled binary
> > packages, rather than compiling from source.  When you do have to
> > compile from source, it often requires you to fiddle with nitty
gritty
> > details about which you'd rather remain ignorant.  The less
fiddling
> > required, the happier the user will be, and the easier it will be
for
> > that product to get adopted on that platform.  No psychic abilities
are
> > required.  No Python abilities are required, either, for that
matter.
> > ;-)
>
> And the fact that building *any* Windows native program without
commercial
> software is a PITA is the py-dev crew's fault, how?

I don't recall saying that it was their fault, but if I gave that
impression I apologize.  I'm mainly reacting to those individuals who
keep claiming that things couldn't be any simpler and that there is no
problem.  Based on the quality of the rest of your reply, you clearly
on not one of those individuals.  In fact, you have given some great
information here.  So thank you.  It is greatly appreciated.

> The python.org releases provide pre-built binaries for Windows,
support for
> compiling Windows extensions with various compilers (including
MinGW), and
> autoconf/automake support for POSIX-ish platforms (including Cygwin).

True, and I've always been glad that Tim Peters went through all the
trouble of creating and supporting the Windows binaries because I was
on the Windows platform when I first got introduced to Python.  Thank
you, Tim!

> For native Windows compilation of the interpreter, they support MSVC6
and MSVC7.1.
>
> If you're a serious commercial Windows shop, you will have one of the
Microsoft
> compiler suites installed *somewhere*. At that point, building your
own version
> of Python is trivial.

True, but see my reply to your subsequent points.

> Which leaves the hobbyists, and those companies which, for whatever
reason,
> choose not to use Visual Studio to build C/C++ code on Windows.

Exactly.  And how big is that group, really?  It might be quite large.

> If it meets your needs, the easiest solution is to build a non-native
version
> using Cygwin (./configure, make, make altinstall). That's what I
currently do,
> as the easiest free way to hack Python on a Windows box.

Yeah, but Cygwin is a bit scary for Windows folks who aren't familiar
with Linux or Unix.

> Which means our target group is now only those who want to build a
Windows
> Python binary, and don't want to use Visual Studio, and don't want to
use Cygwin
> (hmm, the group under discussion must be getting rather small by
now).

Actually, I think this group is potentially huge in comparison to the
current users of Python.  It's just that they aren't currently
represented in the Python community.  Look at the PythonCard project.
I was involved in the early stages of its formation (that was when I
wrote PyCrust, which was incorporated into PythonCard).  A great deal
of the interest in PythonCard was from hobbyists, VBers, old HyperCard
developers, etc.  These folks were not your typical Python programmers.
 They just wanted a simple tool that they could use to create simple
applications.

Now what if PythonCard started using some C source code as part of
their project?  They would either have to provide binaries, or they
would have to make it easy for their developer community, many of whom
are on Windows, to be able to compile C extensions for Python.  If they
couldn't make it easy, they would risk alienating many of their
supporters.

So my only point is that by making it easier to use C extensions, we
have an opportunity to make Python more attractive to a broader
audience that includes hobbyists and folks that do not want to pay for
commercial C compilers.  And I think there may very well be more C code
in typical projects with all the cool tools getting used, like Pyrex
and such.

[snip]

The rest of your message provided great information.  Thank you very
much.

--
Patrick K. O'Brien
Orbtech    http://www.orbtech.com
Schevo     http://www.schevo.org
Pypersyst  http://www.pypersyst.org



From noreply at python.org  Fri Feb  4 12:30:02 2005
From: noreply at python.org (Automatic Email Delivery Software)
Date: Fri, 4 Feb 2005 18:30:02 +0100
Subject: MDaemon Warning - virus found: Returned mail: Data format error
Message-ID: <20050204173054.D56361E4006@bag.python.org>


******************************* WARNING ******************************
Este mensaje ha sido analizado por MDaemon AntiVirus y ha encontrado 
un fichero anexo(s) infectado(s).  Por favor revise el reporte de abajo.

Attachment                    Virus name               Action taken
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**********************************************************************


The original message was received at Fri, 4 Feb 2005 18:30:02 +0100
from python.org [222.131.140.165]

----- The following addresses had permanent fatal errors -----
<python-list at python.org>

----- Transcript of session follows -----
... while talking to mail server 90.160.46.39:
>>> DATA
<<< 400-aturner; %MAIL-E-OPENOUT, error opening !AS as output
<<< 400-aturner; -RMS-E-CRE, ACP file create failed
<<< 400


From mensanator at aol.com  Thu Feb 17 02:04:44 2005
From: mensanator at aol.com (mensanator at aol.com)
Date: 16 Feb 2005 23:04:44 -0800
Subject: Font size
In-Reply-To: <4213e033$1@news.comindico.com.au>
References: <42126822@news.comindico.com.au>
	<ldzqyx6byqdw$.wt8smryc0t3.dlg@40tude.net>
	<42129ea1@news.comindico.com.au> <4213e033$1@news.comindico.com.au>
Message-ID: <1108622097.918855.189780@c13g2000cwb.googlegroups.com>


Adam wrote:
> "Adam" <adam at eden.com> wrote in message
> news:42129ea1 at news.comindico.com.au...
> >
> > "BOOGIEMAN" <BOOGIEMANPN at YAHOO.COM> wrote in message
> > news:ldzqyx6byqdw$.wt8smryc0t3.dlg at 40tude.net...
> >> On Tue, 15 Feb 2005 21:22:43 GMT, Adam wrote:
> >>
> >>> Please help me.
> >>> How do you clear the screen and then display a number with an
enlarged
> >>> font
> >>> size (about 300).
> >>> Adam.
> >>
> >> To clear screen in windows :
> >>
> >> #at the beggining of the program
> >> import os
> >>
> >> #when you want to clear the screen
> >> os.system("cls")
> >
> > Thanks
> > I'll try that.
> > Adam.
> >
> Unfortunately that didn't work.
> Here's what I'm trying to do.
> We are running a numbers game at our retirement village and using a
roulette
> wheel to generate the numbers. but this wheel is only about 12 in
diameter
> and is little more than a toy. So we came up with the idea of using a
random
> number generator to generate numbers from 0 to 36 and display them in
large
> figures on my laptop. This is for the benefit of those people who are
hard
> of hearing. They like to see what is happening.
> I was an RPG programmer before retirement but am new to Python. So I
used
> the following code to generate the numbers but I don't know how to
display
> them in large figures (about 3 ins high) or get rid of the idle text.
>
> from random import randint
> rand = randint(0,36)
> print rand
>
> my os = XP
> Can you help?
> Adam.

What about using banner printing?

    @@@@@@@@@@@@@@@@@@@@
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@@@@@@@@@        @@@@@@@@@@@
@@@@@@@@          @@@@@@@@@@
@@@@@@@@          @@@@@@@@@@
@@@@@@@@          @@@@@@@@@@
@@@@@@@@          @@@@@@@@@@
@@@@@@@@          @@@@@@@@@@
@@@@@@@@          @@@@@@@@@@
@@@@@@@@          @@@@@@@@@@
@@@@@@@@          @@@@@@@@@@
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@@@@@@@@@        @@@@@@@@@@@
@@@@@@@@@@@@@@@@@@@@@@@@@@@@
 @@@@@@@@@@@@@@@@@@@@@@@@@@ 
    @@@@@@@@@@@@@@@@@@@@



From bearophileHUGS at lycos.com  Sat Feb 19 20:56:27 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 19 Feb 2005 17:56:27 -0800
Subject: exercise: partition a list by equivalence
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<1108814276.680736.264380@l41g2000cwc.googlegroups.com>
	<37pb5jF5fnfivU1@individual.net>
	<1108856859.576211.178480@l41g2000cwc.googlegroups.com>
Message-ID: <1108864587.304465.87100@g14g2000cwa.googlegroups.com>

John Machin>FWIW, here's a brief UAT report:

Here is something else for you.
Note: for more correct comparisons, for the following tests I've
disabled the use of Psyco in Graph (usually enabled, if present).
This looks faster than merge2 for this (quite sparse) random pairs
test:

. import graph # http://www.fantascienza.net/animalia/graph.zip
. def merge4(l):
.     g = graph.Graph()
.     for n1,n2 in l:
.         g.addArc(n1,n2)
.     return g.connectedComponents()

Creating a better addArcs produces good results (addArcs method is
present in Graph, but addArcs2 isn't present):

. def merge5(l):
.     g = graph.Graph()
.     g.addArcs2(l)
.     return g.connectedComponents()


If you like to see the actual code, without using Graph, I've made a
very stripped down version of addArcs2 and connectedComponents:

. from collections import deque
. from itertools import chain
.
. def merge6(l):
.     # graph creation
.     gi = {}
.     go = {}
.     for n1,n2 in l:
.         if n1 not in go:
.             go[n1] = {}
.             gi[n1] = {}
.         if n2 not in go:
.             go[n2] = {}
.             gi[n2] = {}
.         go[n1][n2] = 0
.         gi[n2][n1] = 0
.     # Connected components:
.     result = []
.     visited = set()
.     for root in go.iterkeys():
.         if root not in visited:
.             component = [root]
.             visited.add(root)
.             Q = deque() # A queue
.             Q.append(root)
.             while Q:
.                 n1 = Q.popleft()
.                 for n2 in chain( go[n1].iterkeys(), gi[n1].iterkeys()
):
.                     if n2 not in visited:
.                         visited.add(n2)
.                         Q.append(n2)
.                         component.append(n2)
.             result.append(component)
.     return result


At the end of the tests I've added this to be sure the results are
always the same:

r2 = set( frozenset(e) for e in merge2(l) )
r4 = set( frozenset(e) for e in merge4(l) )
r5 = set( frozenset(e) for e in merge5(l) )
r6 = set( frozenset(e) for e in merge6(l) )
assert r2 == r4
assert r2 == r6

For xMax, nPairs = 1000, 5000:
merge2: 15750 function calls in 0.939 CPU seconds
merge4: 11029 function calls in 0.560 CPU seconds
merge5: 6030 function calls in 0.303 CPU seconds
merge6: 6011 function calls in 0.297 CPU seconds

For xMax, nPairs = 2000, 10000:
merge2: 31503 function calls in 2.505 CPU seconds
merge6: 12011 function calls in 0.639 CPU seconds

Timings using clock() (much more reliable than the profilers!), for
xMax, nPairs = 2000, 10000:
merge2: 1.222
merge6: 0.201

Probably merge6 can be improved, reducing memory used...

Bear hugs,
Bearophile



From harlinseritt at yahoo.com  Fri Feb 25 03:09:40 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 25 Feb 2005 00:09:40 -0800
Subject: Default value for Listbox (Tkinter)
References: <1109299588.575892.244990@g14g2000cwa.googlegroups.com>
	<wHATd.15$L_6.10@news.get2net.dk>
Message-ID: <1109318980.583587.216350@l41g2000cwc.googlegroups.com>

Thanks Jorgen!

I was reading the Tkinter tutorial (I was looking at this particular
page:
http://www.pythonware.com/library/tkinter/introduction/x5513-methods.htm)
and saw this for select_set():


select_set(index), select_set(first, last)
Add one or more items to the selection.


I think this was why I overlooked it. The description for it says the
listbox adds one or more items to a selection. I would think the
description should say the listbox sets the index or element.

Thanks again,

Harlin



From bpeng at rice.edu  Sat Feb  5 01:05:09 2005
From: bpeng at rice.edu (Bo Peng)
Date: Sat, 05 Feb 2005 00:05:09 -0600
Subject: changing local namespace of a function
In-Reply-To: <cu1n1t$507$1@joe.rice.edu>
References: <cu0lru$8ik$1@joe.rice.edu>
	<1107550212.114358.281200@z14g2000cwz.googlegroups.com>
	<cu13vi$ji7$1@joe.rice.edu>
	<1107582027.700961.156800@f14g2000cwb.googlegroups.com>
	<cu1n1t$507$1@joe.rice.edu>
Message-ID: <cu1nml$5db$1@joe.rice.edu>

> Maybe it is just my laziness. It is almost intolerable for me to write 
> lines and lines of code like
> 
>   d['z'] = func(d['x']+d['y']+d['whatever']['as']+d[a][0] )
> 

By the way, will 'with statement', like the one in pascal and many other 
languages, be a good addition to python? For example,

with d do:
   z = x + y

would be equivalent to d['z']=d['x']+d['y'] or d.z = d.x + d.y in some 
other cases.

This would absolutely be the *best* solution to my problem.

Bo


From tchur at optushome.com.au  Wed Feb  9 20:01:42 2005
From: tchur at optushome.com.au (Tim Churches)
Date: Thu, 10 Feb 2005 12:01:42 +1100
Subject: Big development in the GUI realm
Message-ID: <200502100101.j1A11g8f012031@mail15.syd.optusnet.com.au>

An embedded and charset-unspecified text was scrubbed...
Name: not available
URL: <http://mail.python.org/pipermail/python-list/attachments/20050210/4d1f6b08/attachment.ksh>

From doodle4 at gmail.com  Wed Feb  9 18:35:30 2005
From: doodle4 at gmail.com (doodle4 at gmail.com)
Date: 9 Feb 2005 15:35:30 -0800
Subject: newbie question
In-Reply-To: <xfOdnUnRLYukB5ffRVn-tA@powergate.ca>
References: <1107990182.516041.120410@o13g2000cwo.googlegroups.com>
	<xfOdnUnRLYukB5ffRVn-tA@powergate.ca>
Message-ID: <1107992130.921664.68860@z14g2000cwz.googlegroups.com>

Thanks for the reply.

I am trying to convert some C code to python and i was not sure what
the equivalent python code would be.

I want to postdecrement the value in the while loop. Since i cannot use
assignment in while statements is there any other way to do it in
python?

Thanks.
-d4



From mhuffnagle at knowtechnology.net  Thu Feb  3 17:27:05 2005
From: mhuffnagle at knowtechnology.net (Marc Huffnagle)
Date: Thu, 03 Feb 2005 17:27:05 -0500
Subject: List mapping question
In-Reply-To: <vvxMd.102714$Jk5.11242@lakeread01>
References: <g-mdnXrKqZd2Ap_fRVn-rw@midcoast.com>
	<vvxMd.102714$Jk5.11242@lakeread01>
Message-ID: <YrCdnTL0BbmkOJ_fRVn-iw@gwi.net>

Steve Holden wrote:
> Marc Huffnagle wrote:
> 
>> I have a number of variables that I want to modify (a bunch of strings 
>> that I need to convert into ints).  Is there an easy way to do that 
>> other than saying:
>>
>>  > a = int(a)
>>  > b = int(b)
>>  > c = int(c)
>>
>> I tried
>>
>>  > [i = int(i) for i in [a, b, c]]
>>
>> but that didn't work because it was creating a list with the values of 
>> a, b and c instead of the actual variables themselves, then trying to 
>> set a string equal to an integer, which it really didn't like.
>>
>>      Marc
> 
>  >>> a,b,c = 1.1, 2.2, 3.3
>  >>> a,b,c = map(int, (a,b,c))
>  >>> a,b,c
> (1, 2, 3)
>  >>> a,b,c = [int(x) for x in (a,b,c)]
>  >>> a,b,c
> (1, 2, 3)
> 
> regards
>  Steve

Thanks ... so there's no way to pass an actual variable into a list 
mapping, instead of its value?  I guess I'm thinking of something the 
equivalent of call by reference.


      Marc


From news at NOwillmcguganSPAM.com  Sun Feb 27 12:14:08 2005
From: news at NOwillmcguganSPAM.com (Will McGugan)
Date: Sun, 27 Feb 2005 17:14:08 +0000
Subject: Text To Speech with pyTTS
In-Reply-To: <p7mdnfGdItpSbrzfRVn-hw@powergate.ca>
References: <4221b0b6$0$1998$afc38c87@news.optusnet.com.au>
	<p7mdnfGdItpSbrzfRVn-hw@powergate.ca>
Message-ID: <4221ffe1$0$8755$db0fefd9@news.zen.co.uk>

Peter Hansen wrote:
> Mike P. wrote:
> 
>> I was wondering if anyone has had any luck with the python text to speech
>> (pyTTS) module available on Sourceforge:
>> http://sourceforge.net/projects/uncassist
> 
> 
> I saw the following blog entry by Joey deVilla:
> http://farm.tucows.com/blog/Platforms/Windows/_archives/2005/1/19/266813.html 
> 
> 
> and immediately tried it out.  All I did was download the
> PyTTS package for Python (2.4, not 2.3), and install it,
> then ran Joey's sample above.  It worked as advertised.
> This was on Windows XP SP2.

I experience the same thing as Mike P. Im running on Windows 2K.

Will McGugan


From rkern at ucsd.edu  Mon Feb 21 05:14:46 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 21 Feb 2005 02:14:46 -0800
Subject: [PyGTK] Resizing a HandleBox
In-Reply-To: <4219b242$0$8861$79c14f64@nan-newsreader-07.noos.net>
References: <4219b242$0$8861$79c14f64@nan-newsreader-07.noos.net>
Message-ID: <cvccal$3ki$1@news1.ucsd.edu>

Franck Pommereau wrote:
> Hi all,
> 
> I'm using PyGTK-2.0.0, when I detach a HandleBox, the resizing of the 
> newly created window is broken: it can be resized but it's content (the 
> HandleBox and its child) is not affected at all and is not resized.
> 
> Does any one have a solytion to this problem?

I'm afraid I don't, but I'll bet that someone on the PyGTK mailing list 
does.

http://www.daa.com.au/mailman/listinfo/pygtk

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From smitty_one_each at bigfoot.com  Fri Feb 25 07:41:34 2005
From: smitty_one_each at bigfoot.com (Chris Smith)
Date: Fri, 25 Feb 2005 07:41:34 -0500
Subject: Interesting decorator use.
References: <421e2398@nntp0.pdx.net>
	<mailman.3017.1109277781.22381.python-list@python.org>
	<M5adncYw-5gT04PfRVn-ug@comcast.com>
	<mailman.3022.1109283136.22381.python-list@python.org>
	<A-2dnebKq7ywzoPfRVn-tQ@comcast.com>
	<mailman.3025.1109286919.22381.python-list@python.org>
Message-ID: <uu0o0bym9.fsf@bigfoot.com>

>>>>> "Tom" == Tom Willis <tom.willis at gmail.com> writes:
    Tom> Pretty slick that python can have AOP-like features sort of
    Tom> out of the box.
One wonders if there will not be 
py>import AOP
in the pythonic future.  These decorators could lead to byzantine
trees of @.
Now, if the decorators start writing code on the fly, shall python
have achieved Lisp macros?
Best,
Chris


From snacktime at gmail.com  Mon Feb  7 14:17:00 2005
From: snacktime at gmail.com (snacktime)
Date: Mon, 7 Feb 2005 11:17:00 -0800
Subject: Problems with python and threads under Freebsd
Message-ID: <1f060c4c05020711177fa00fad@mail.gmail.com>

I posted this to freebsd-questions, but though I would put it here
also in case anyone has any ideas.

I am consistantly getting seg faults and bus errors when running a
multi threaded python application under 5.3-release-p2.  Python was
built from the port(python 2.4) with threading enabled.  Rebuilding
with the huge stack size option enabled didn't make a difference.  The
application uses twisted (www.twistedmatrix.com) and it runs fine
until I put it under a bit of a load and have 20-30 simultaneous
threads running.  Then it core dumps.  Following is the backtrace from
the core file.  The backtrace is always the same.  

#0  0x2823cdbb in pthread_testcancel () from /usr/lib/libpthread.so.1
#1  0x28234b06 in pthread_mutexattr_init () from /usr/lib/libpthread.so.1
#2  0x00000000 in ?? ()


From mesteve_b at hotmail.com  Sun Feb 13 23:14:28 2005
From: mesteve_b at hotmail.com (python newbie)
Date: Mon, 14 Feb 2005 04:14:28 GMT
Subject: OS env for Windows
References: <mailman.2503.1108343952.22381.python-list@python.org>
Message-ID: <EAVPd.4762$aW6.650@newssvr22.news.prodigy.net>

Cool thanks a lot. Always wanted to use win32api module too.
"Tony Meyer" <t-meyer at ihug.co.nz> wrote in message 
news:mailman.2503.1108343952.22381.python-list at python.org...
>> Is there any other way
>> of distinguishing between XP and 2000 I wonder?
>
> WinXP SP2:
>
>>>> import win32api
>>>> major, minor, spack, platform, ver_str = win32api.GetVersionEx()
>>>> print major, minor, spack, platform, ver_str
> 5 1 2600 2 Service Pack 2
>
> WinNT SP4:
>
>>>> import win32api
>>>> major, minor, spack, platform, ver_str = win32api.GetVersionEx()
>>>> print major, minor, spack, platform, ver_str
> 5 0 2195 2 Service Pack 4
>
> =Tony.Meyer
> 




From fredrik at pythonware.com  Mon Feb  7 18:14:52 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 00:14:52 +0100
Subject: def __init__ question in a class definition rephrased
References: <1107817173.3795.51.camel@batfink.its.adelaide.edu.au>
Message-ID: <cu8smc$rnb$1@sea.gmane.org>

Jeffrey Borkent wrote:

> what is the significance ( if any ) of the __ in these self.xxxxxx
> assignments.
>
> If i look at chapter 9.5 in the tutorial (v2.3.4) then it talks
> about private variables.... is this the same thing

yes.

</F> 





From mirandacascade at yahoo.com  Sun Feb 20 02:13:32 2005
From: mirandacascade at yahoo.com (mirandacascade at yahoo.com)
Date: 19 Feb 2005 23:13:32 -0800
Subject: newbie question - exception processing
Message-ID: <1108883612.511033.154920@o13g2000cwo.googlegroups.com>

O/S: Windows XP Service Pack 2
Python version: 2.4

Unable to understand how to build a class to handle an exception.

Contents of sample01.py:
import exceptions
class SampleMain:
    try:
        def __init__(self):
            print 'in SampleMain constructor'

        def Allowed(self):
            print 'in allowed'

        def NotYetAllowed(self):
            UCError = UnderConstructionError('not yet ready')
            raise UCError

    except UnderConstructionError, e:
        print e.msg

class Error(exceptions.Exception):
    def __init__(self):
        print 'in base class constructor'

class UnderConstructionError(Error):
    def __init__(self, message):
        print 'in UnderConstructionError constructor'
        self.msg = message

Copy/paste of interactive window:
PythonWin 2.4 (#60, Nov 30 2004, 09:34:21) [MSC v.1310 32 bit (Intel)]
on win32.
Portions Copyright 1994-2004 Mark Hammond (mhammond at skippinet.com.au) -
see 'Help/About PythonWin' for further copyright information.
>>> import sample01
>>> x = sample01.SampleMain()
in SampleMain constructor
>>> x.NotYetAllowed()
in UnderConstructionError constructor
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
  File "C:\Python24\sample01.py", line 12, in NotYetAllowed
    raise UCError
UnderConstructionError: <unprintable instance object>
>>>

My questions are:
1) What is causing the error described in the Traceback?
2) Given that what I want to happen when the NotYetAllowed() method is
called is:
    a) an exception to be raised
    b) the exception results in a message getting printed; the message
should come from the place where the exception was raised, and it
should be passed to the exception class as a string object; so in this
case the message that should be printed is 'not yet ready'
    c) the exception gets handled with the try/except within the
SampleMain class

My question is: what changes must I make to the code to make that
happen?

Thank you.



From snail at objmedia.demon.co.uk  Mon Feb 14 13:52:21 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Mon, 14 Feb 2005 18:52:21 +0000
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr>
	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>
	<guLnmSj92OECFw0L@objmedia.demon.co.uk>
Message-ID: <rt9VGTolNPECFwE8@objmedia.demon.co.uk>

In message <guLnmSj92OECFw0L at objmedia.demon.co.uk>, Stephen Kellett 
<snail at objmedia.demon.co.uk> writes
>Studio Express (downloadable from the Microsoft's website). This DLL is 
>(to my understanding) part of Visual Studio 7.1 and Visual Studio 
>Express.

My mistake. Visual Studio Express is going to be part of Version 8 
(2005) and thus the DLLs there will be msvcr80.dll

That said, I still stand by my licensing comments.

Distributable files overview.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccore/h
tml/vcconalistofredistributablefiles.asp

V7.0/V7.1 specific redistribution instructions.
http://support.microsoft.com/default.aspx?scid=kb;en-us;326922
Title: INFO: Redistribution of the Shared C Runtime Component in Visual
         C++ .NET
Article ID      :       326922
Last Review     :       March 25, 2004
Revision        :       1.0
Keywords:               kbinfo KB326922

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From francis.girard at free.fr  Mon Feb 14 15:43:58 2005
From: francis.girard at free.fr (Francis Girard)
Date: Mon, 14 Feb 2005 21:43:58 +0100
Subject: Commerical graphing packages?
In-Reply-To: <cupsik$an7$1@ctb-nnrp2.saix.net>
References: <420d1595$1@nntp.zianet.com> <cupsik$an7$1@ctb-nnrp2.saix.net>
Message-ID: <200502142143.58961.francis.girard@free.fr>

Le lundi 14 F?vrier 2005 11:02, David Fraser a ?crit?:
> Erik Johnson wrote:
> >     I am wanting to generate dynamic graphs for our website and would
> > rather not invest the time in developing the code to draw these starting
> > from graphics primitives. I am looking for something that is... "fairly
> > robust" but our needs are relatively modest: X-Y scatter plots w/ data
> > point symbols, multiple data set X-Y line plots, bar charts, etc.
> >
> >     Preferably this would come from a company that can provide support &
> > decent documentation, and a package that can be installed without a bunch
> > of extra hassle (e.g., needs Numeric Python, needs to have the GD library
> > installed, needs separate JPEG encoders, font libraries, etc.)
> >
> >     I am aware of ChartDirector (http://www.advsofteng.com/ ) which
> > explicitly supports python and seems to be about the right level of
> > sophistication. I don't really know of any other packages in this space,
> > do you? I am seeking feedback and reccomendations from people who have
> > used this package or similar ones. I am particularly interested to hear
> > about any limitations or problems you ran into with whatever package you
> > are using.
> >
> > Thanks for taking the time to read my post! :)
>
> It's worth checking out matplotlib as well although it may not meet all
> your criteria ... but have a look, its a great package

PyX might also be interesting, depending on your needs.

Regards

Francis Girard



From andreas.lobinger at netsurf.de  Tue Feb 22 09:38:33 2005
From: andreas.lobinger at netsurf.de (Andreas Lobinger)
Date: Tue, 22 Feb 2005 15:38:33 +0100
Subject: searching pdf files for certain info
In-Reply-To: <cvfdgg$fr0$1@solaris.cc.vt.edu>
References: <cvfdgg$fr0$1@solaris.cc.vt.edu>
Message-ID: <cvfg5a$6g6$1@news.mch.sbs.de>

Aloha,

rbt wrote:
> Not really a Python question... but here goes: Is there a way to read 
> the content of a PDF file and decode it with Python? I'd like to read 
> PDF's, decode them, and then search the data for certain strings.

First of all,
http://groups.google.de/groups?selm=400CF2E3.29506EAE%40netsurf.de&output=gplain
still applies here.

If you can deal with a very basic implementation of a pdf-lib you
might be interested in
http://sourceforge.net/projects/pdfplayground

In the CVS (or the current snapshot) you can find in
ppg/Doc/text_extract.txt an example for text extraction.

  >>> import pdffile
  >>> import pages
  >>> import zlib
  >>> pf = pdffile.pdffile('../pdf-testset1/a.pdf')
  >>> pp = pages.pages(pf)
  >>> c = zlib.decompress(pf[pp.pagelist[0]['/Contents']].stream)
  >>> op = pdftool.parse_content(c)
  >>> sop = [x[1] for x in op if x[0] in ["'", "Tj"]]
  >>> for a in sop:
         print a[0]

Wishing a happy day
	LOBI


From alan.mcintyre at esrgtech.com  Sat Feb  5 08:46:58 2005
From: alan.mcintyre at esrgtech.com (Alan McIntyre)
Date: Sat, 05 Feb 2005 08:46:58 -0500
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <mailman.1961.1107590890.22381.python-list@python.org>
References: <mailman.1961.1107590890.22381.python-list@python.org>
Message-ID: <m74Nd.103630$Jk5.79741@lakeread01>

Steve,

Yeah, in this particular application the ordering and reoccurrence of a 
value in a non-contiguous way does matter; if those two things weren't 
required I think the method you suggested would be a good way to remove 
the duplicates.

Thanks!

Coates, Steve (ACHE) wrote:
> It's not _exactly_ what you asked for but it may be enough...
> 
> Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on
> win32
> Type "help", "copyright", "credits" or "license" for more information.
> 
>>>>from sets import Set
>>>>l = [0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5]
>>>>s = Set(l)
>>>>s
> 
> Set([0, 1, 2, 3, 4, 5])
> 
>>>>l2 = list(s)
>>>>l2
> 
> [0, 1, 2, 3, 4, 5]
> 
> 
> I say it's not exactly what you wanted because I don't think the
> ordering
> of l2 is necessarily the same as l. That may or may not be a problem for
> you.
> 
> Regards
> Steve


From neutrinman at myrealbox.com  Fri Feb 25 05:25:45 2005
From: neutrinman at myrealbox.com (neutrinman at myrealbox.com)
Date: 25 Feb 2005 02:25:45 -0800
Subject: how to use property
Message-ID: <1109327145.250209.203720@o13g2000cwo.googlegroups.com>

My question is how should I use "property" which wraps up
__get_channel() and __set_channel()in the following program.
I tried the program that written below, and it worked. Then I tried:
    channel = property(__get_channel,__set_channel) as in comment 1, 2,
and 3,

but it generates the error:
    Traceback (most recent call last):
  File "C:/WINDOWS/desktop/test.py", line 41, in -toplevel-
    main()
  File "C:/WINDOWS/desktpo/test.py", line 37, in main
    tv.change_channel(choice)
  File "C:/WINDOWS/desktop/test.py", line 27, in change_channel
    self.channel(choice)
TypeError: 'int' object is not callable

I am now studying class, so want to use property.
This program simulates changing channel number 1 through 10 on TV.
How should I use property here?

---------------------------------------
##simulating a TV

##defining class
class TV(object):
	def __init__(self, channel = 1):
                self.__channel = channel
                self.__volume = volume
		print "the default channel is", self.__channel

	def __get_channel(self):
		return self.__channel

	def __set_channel(self, choice):
		if choice == "+":
			self.__channel += 1
		elif choice == "-":
			self.__channel -= 1
		if self.__channel == 0:
			self.__channel = 10
		elif self.__channel == 11:
			self.__channel = 1

        #comment1: channel = property(__get_channel, __set_channel)

	def change_channel(self, choice):
                self.__set_channel(choice)
                print self.__get_channel()

                #comment2: self.channel(choice)
                #comment3: print "channel: ", self.channel


##main part
def main():
	tv = TV()
	choice = " "
	while choice:
            choice = raw_input("choice (+ / -): ")
            tv.change_channel(choice)
            

##starting program
main()



From unlearned at gmail.com  Wed Feb 23 05:25:50 2005
From: unlearned at gmail.com (Daniel Fackrell)
Date: Wed, 23 Feb 2005 03:25:50 -0700
Subject: assert 0, "foo" vs. assert(0, "foo")
References: <pan.2005.02.23.09.57.43.578480@thomas-guettler.de>
Message-ID: <cvhl9m$3j5$1@sea.gmane.org>

> "Thomas Guettler" <guettli at thomas-guettler.de> wrote in message
> news:pan.2005.02.23.09.57.43.578480 at thomas-guettler.de...
> Hi,

> Python 2.3.3 (#1, Feb  5 2005, 16:22:10) [GCC 3.3.3 (SuSE Linux)] on
linux2
> >>> assert 0, "foo"

Assert that 0 is true.  If that fails, raise AssertionError("foo").

> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AssertionError: foo
> >>> assert(0, "foo")

Assert that the tuple (0, "foo") is true.  Non-empty tuples are always true.

> >>>
>
> If you use parenthesis for the assert statement, it never
> raises an exception.

> Up to now I raised strings, but since this is deprecated,
> I switched to use the second argument for the assert
> statement.

> Is it possible to change future python versions, that
> assert accept parenthesis?

As shown above, it does, but it doesn't do quite what you expected.  For
further enlightenment, try the following and think through why each one
gives the results it does:

assert (), 'spam'
assert [], 'eggs'
assert {}, 'spam and eggs'
assert (0,), 'spam, spam, and eggs'
assert (0, "foo"), 'spam, spam, eggs, and spam'
assert 0, "foo", 'shrubbery'

The last will give a syntax error.  Can you spot why?

>  Thomas

> -- 
> Thomas G?ttler, http://www.thomas-guettler.de/





From jjl at pobox.com  Sun Feb  6 09:32:32 2005
From: jjl at pobox.com (John J. Lee)
Date: 06 Feb 2005 14:32:32 +0000
Subject: How do I convert arithemtic string (like "2+2") to a number?
References: <mailman.1996.1107640917.22381.python-list@python.org>
	<1107641467.104883.177850@c13g2000cwb.googlegroups.com>
	<mailman.2010.1107673611.22381.python-list@python.org>
	<1107674970.152776.164170@c13g2000cwb.googlegroups.com>
	<36m92pF52msqlU1@individual.net>
	<1107687633.712157.142040@g14g2000cwa.googlegroups.com>
Message-ID: <871xbtiwsf.fsf@pobox.com>

"Adomas" <adomas.paltanavicius at gmail.com> writes:

> Well, a bit more secure would be
> 
> eval(expression, {'__builtins__': {}}, {})
> 
> or alike.

Don't believe this without (or even with ;-) very careful thought,
anyone.  Google for rexec.


John


From gabriel.barros at gmail.com  Tue Feb  8 19:53:51 2005
From: gabriel.barros at gmail.com (Gabriel B.)
Date: Tue, 8 Feb 2005 22:53:51 -0200
Subject: tk global bindings
In-Reply-To: <ctgsiq$31r$1@news1.tilbu1.nb.home.nl>
References: <mailman.1577.1107022579.22381.python-list@python.org>
	<ctgs37$rqa$1@news1.tilbu1.nb.home.nl>
	<ctgsiq$31r$1@news1.tilbu1.nb.home.nl>
Message-ID: <5175a81c05020816534f2c8fc9@mail.gmail.com>

> Oh and you of course __must__ look at the (recently updated!) New Mexico
> Tech tkinter document at:
> http://infohost.nmt.edu/tcc/help/pubs/tkinter.pdf
> 
> See page 75 and follwing for more info on keyboard bindings...

Thanks, i was looking down that doc because the first thing i looked
into it was the pack method and it talked about the grid only

...i'm still using "practical programing in Tcl and Tk" for my tk needs :)

thanks again,
Gabriel


From adam at cognitcorp.com  Sun Feb  6 02:06:49 2005
From: adam at cognitcorp.com (Adam DePrince)
Date: Sun, 06 Feb 2005 02:06:49 -0500
Subject: How do I convert arithemtic string (like "2+2") to a number?
In-Reply-To: <1107641467.104883.177850@c13g2000cwb.googlegroups.com>
References: <mailman.1996.1107640917.22381.python-list@python.org>
	<1107641467.104883.177850@c13g2000cwb.googlegroups.com>
Message-ID: <1107673609.3948.5.camel@localhost.localdomain>

On Sat, 2005-02-05 at 17:11, Michael Hartl wrote:
> Use the eval function:
> 
> >>> eval("30/(6+9)")
> 2
> 
> Michael

Sure, if you trust the source of the string you are evaluating.  If this
is a form submission on your web site, be wary of the nefarious user who
might submit to you:

commands.getoutput( "rm -rf %(HOME)s"%os.environ )

as the "expression" to evaluate.


Adam DePrince 




From ilias at lazaridis.com  Sun Feb 20 11:57:02 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sun, 20 Feb 2005 18:57:02 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2866.1108917759.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr>	<42172136$0$27576$9b622d9e@news.freenet.de>	<cv7i57$d0v$1@usenet.otenet.gr>	<42185b05$0$15460$9b622d9e@news.freenet.de>	<cv9sdo$69n$3@usenet.otenet.gr>	<42189527$0$6260$9b622d9e@news.freenet.de>	<cvadcj$mqc$1@usenet.otenet.gr>
	<mailman.2866.1108917759.22381.python-list@python.org>
Message-ID: <cvafgu$2lk$1@usenet.otenet.gr>

Jan Dries wrote:
> Ilias Lazaridis wrote:
[...] - (things which justify inability of coherence-detection)

> If you would have written:
> 
> """
> Should I take answers serious? Answer from people which do not respect 
> coherence of writings?
> """
> 
> it would have been much more coherent.

I understand.

Let's see:

-

Should I take answers serious?

.

.

.

.

Answer from people which do not respect coherence of writings?

-
-
-

I still detect the coherence.

As most people in this group will detect the coherence.

[Except if you want to ignore it, thus you can get at least _one_ 
'points' ins this discussion]

> Regards,
> Jan

.

-- 
http://lazaridis.com


From richie at entrian.com  Fri Feb 25 09:54:34 2005
From: richie at entrian.com (Richie Hindle)
Date: Fri, 25 Feb 2005 14:54:34 +0000
Subject: Is there way to determine which class a method is bound to?
In-Reply-To: <a8bfd74c05022506466cd6d3fc@mail.gmail.com>
References: <a8bfd74c05022506466cd6d3fc@mail.gmail.com>
Message-ID: <vueu115tqf6dbbakaedt2148vjj3hc84j5@4ax.com>


[vic]
> I'm doing some evil things in Python and I would find it useful to
> determine which class a method is bound to when I'm given a method
> pointer.

Here you go:

>>> class Foo:
...   def bar(self):
...     pass
...
>>> Foo.bar.im_class
<class __main__.Foo at 0x008ED720>
>>> Foo().bar.im_class
<class __main__.Foo at 0x008ED720>
>>>

-- 
Richie Hindle
richie at entrian.com



From tchur at optushome.com.au  Fri Feb  4 17:06:25 2005
From: tchur at optushome.com.au (Tim Churches)
Date: Sat, 05 Feb 2005 09:06:25 +1100
Subject: [Fwd: [gnu.org #220719] Re: python and gpl]
In-Reply-To: <ctvkf2$853$1@blackmamba.itd.rl.ac.uk>
References: <mailman.1861.1107484943.22381.python-list@python.org>
	<ctvkf2$853$1@blackmamba.itd.rl.ac.uk>
Message-ID: <4203F1E1.2000001@optushome.com.au>

Richard Brodie wrote:

>"Tim Churches" <tchur at optushome.com.au> wrote in message
>news:mailman.1861.1107484943.22381.python-list at python.org...
>
>  
>
>>1) In Australia and Europe at least, loading program code from disc into memory in
>>order to execute it is not considered as making an infringing copy under copyright law.
>>    
>>
>
>I don't think it's as clear cut as that. Sony won their modchip case in Britain
>for exactly that reason. They lost in Australia and elsewhere in Europe.
>  
>
In Australia, the following law applies:

***************************


      COPYRIGHT ACT 1968 (as amended by the Copyright Amendment Act
      2000) - SECT 47B

*Reproduction for normal use or study of computer programs*

             (1)   Subject to subsection (2), the copyright 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s10.html#copy> 
in a literary work 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s189.html#literary_work> 
that is a computer program 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s47ab.html#computer_program> 
is not infringed by the making of a reproduction 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s47b.html#reproduction> 
of the work 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s189.html#work> 
if:

                     (a)   the reproduction 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s47b.html#reproduction> 
is incidentally and automatically made as part of the technical process 
of running a copy 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s10.html#copy> 
of the program for the purposes for which the program was designed; and

                     (b)   the running of the copy 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s10.html#copy> 
is done by, or on behalf of, the owner or licensee of the copy 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s10.html#copy>. 


             (2)   Subsection (1) does not apply to the making of a 
reproduction 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s47b.html#reproduction> 
of a computer program 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s47ab.html#computer_program>: 


                     (a)   from an infringing copy 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s10.html#infringing_copy> 
of the computer 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s47ab.html#computer_program> 
program 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s47ab.html#computer_program>; 
or

                     (b)   contrary to an express direction 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s248a.html#direct> 
or licence 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s136.html#licence> 
given by, or on behalf of, the owner of the copyright 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s10.html#copy> 
in the computer program 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s47ab.html#computer_program> 
to the owner or licensee of the copy 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s10.html#copy> 
from which the reproduction 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s47b.html#reproduction> 
is made when the owner or licensee of that copy 
<http://www.austlii.edu.au/au/legis/cth/consol_act/ca1968133/s10.html#copy> 
acquired it.
***************************

Can't get much clearer than that. Furthermore, I see no express 
directions or other provisions in the GPL which would invoke section 
47(2). Indeed, the GPL says: "The act of running the Program is not 
restricted".

Tim C



From aleaxit at yahoo.com  Mon Feb  7 09:24:10 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 7 Feb 2005 15:24:10 +0100
Subject: Confused with methods
References: <mailman.2022.1107703890.22381.python-list@python.org>
	<TL-dneoHycPA35vfRVn-qQ@rogers.com>
	<mailman.2027.1107713399.22381.python-list@python.org>
	<1grl578.1rmaukw1yyw0g4N%aleaxit@yahoo.com>
	<mailman.2059.1107774429.22381.python-list@python.org>
	<36p3aaF4tdk23U1@individual.net>
Message-ID: <1grmc02.c8ha0t176befwN%aleaxit@yahoo.com>

Diez B. Roggisch <deetsNOSPAM at web.de> wrote:
   ...
> > If there a good reason that the __get__ of a boundmethod does not
> > create a new boundmethod wrapper over the first boundmethod?
> 
> I already gave you the good reason:

Hmmm, not sure the code below is ``a good reason'' to avoid changing the
__get__ behavior of boundmethods come Python 3.0 time.  Assume all
classes are newstyle (they'll be, in 3.0), not that it matters here (I
think):

> class A:
>    def callback(self, arg):
>        print self, arg
> 
> def callback(arg):
>     print arg
> 
> class DoSomethingWithCallback:
>     def __init__(self, cb):
>         self.cb = cb

Here we're setting an INSTANCE attribute,

>     def run(self):
>         for i in xrange(100):
>              self.cb(i)

...and here we're fetching it back.  So, it doesn't matter if the cb
argument is a descriptor of whatever variant -- it must be callable, and
that's all we ask of it.  IOW, cb.__get__ -- whether it exists at all,
and what it does -- just doesn't *matter*; cb.__call__ is all that does
matter.

> u = DoSomethingWithCallback(A().callback)
> v = DoSomethingWithCallback(callback)
> 
> # would crash if your suggestion worked
> u.run()
> v.run()

I don't think there would be any crash, because the idea is about
changing some __get__ behavior, NOT any __call__ behavior, and no
__get__ is involved in this example.

If strong use cases exist for a boundmethod's __get__ keeping its
current behavior (apart from the obvious backwards compatibility issues
which mean that any change will have to wait for 3.0), I don't think
this can be one.
 
 
> Bound methods aren't a general purpose currying scheme - they exist sorely
> for the OO-style implicit first argument. That they exist at all is a great
> difference to e.g. C++, where you can't pass callbacks around that are
> instance methods. 

This is historically true.  However, this historical fact is not
necessarily a reason for keeping the current lower-power behavior of
boundmethods, when 3.0 allows breaking backwards compatibility.

 
> If you are after currying - look at the cookbook, there are recipes for
> that.

Sure, I wrote some of them;-).  But since we're talking about future
prospects, I think the PEP on partial application is more relevant than
the current pure-Python workarounds.  They _are_ workarounds, btw --
partial application, aka currying, is an important general idea; it can
be implemented in Python, but it's not directly part of it.  The PEP's
idea is to have that concept directly implemented.

Actually, I believe that if you call new.instancemethod you CAN already
get that effect -- let's see...:

>>> import new
>>> curry = new.instancemethod
>>> def f(a, b, c): print a, b, c
... 
>>> x = curry(curry(f, 23, object), 45, object)
>>> x(67)
23 45 67

Yep -- just fine (in __call__ terms).  Not so in __get__ terms:

>>> class X(object): pass
... 
>>> X.zap = x
>>> y = X()
>>> y.zap()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: f() takes exactly 3 arguments (2 given)


So, for generic currying (in the original sense: prebinding the FIRST
argument of any callable), new.instancemethod is OK (even though you
have to pass a third argument of 'object', no big deal), and you can
call it repeatedly.  We're only missing a descriptor with a __get__ that
does this appropriately when you set such a ``curried'' callable as a
class attribute.

I'm not sure if the best approach is to change boundmethods' own
__get__, or to have another descriptor for the purpose:

>>> class binder(object):
...   def __init__(self, callable): self.callable = callable
...   def __get__(self, obj, cls): return curry(self.callable, obj, cls)
... 
>>> X.zap = binder(x)
>>> y.zap()
23 45 <__main__.X object at 0x402dfa8c>

This ``binder'' approach would have the advantage of allowing ANY
callable whatsoever, e.g.:

>>> X.__divmod__ = lambda self, other: (self, other)
>>> divmod(y, 23)
(<__main__.X object at 0x402dfa8c>, 23)
>>> X.dm = binder(divmod)
>>> y.dm(23)
(<__main__.X object at 0x402dfa8c>, 23)
>>> 

Of course, a custom metaclass could easily wrap 'binder' around any
class attributes which are callable but aren't descriptors, to get the
same effect more transparently.  Hmmmm -- the tradeoffs aren't clear to
me at this time.  That's exactly what the PEP process is for... ensure
that any tradeoffs ARE discussed in depth before any change is made.


Alex


From john at grulic.org.ar  Fri Feb 18 22:14:52 2005
From: john at grulic.org.ar (John Lenton)
Date: Sat, 19 Feb 2005 00:14:52 -0300
Subject: exercise: partition a list by equivalence
In-Reply-To: <1108774366.122896.293720@l41g2000cwc.googlegroups.com>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<mailman.2803.1108743668.22381.python-list@python.org>
	<1108768870.455974.244590@c13g2000cwb.googlegroups.com>
	<mailman.2819.1108771744.22381.python-list@python.org>
	<1108774366.122896.293720@l41g2000cwc.googlegroups.com>
Message-ID: <20050219031452.GA26695@grulic.org.ar>

On Fri, Feb 18, 2005 at 04:52:46PM -0800, John Machin wrote:
> > > needs "if rev[first] == rev[second]: continue" here
> >
> > an 'is' is enough, and better.
> 
> Good point. You're redeeming yourself :-)

this, together with you saying that it is hard to explain, makes me
think that you aren't comfortable thinking of lists as mutable
objects.


> > what is magic about it? is it really that horrible?
> 
> Try explaining to the newbies over on the tutor list how despite "res"
> only ever *explicitly* having little bits like [3, 4] appended to it,
> it (or more properly the thing to which it refers) is actually
> festering and growing and being mutated under the surface until at the
> finale it bursts out dripping slime just like the creature from the
> black lagoon ...

understanding why that works, and why it is 'is' and not '==', are
both part of the same thing. Lists are mutable, and you can mutate
them, and they mutate. Unless you actually write code that uses the
fact you will forget it, and it will bite you. Of course, don't use it
just for the heck of it, but that creature you dismiss as a
slime-dripping mutation is actually quite useful.

While I'm at being unpolite, do you really think this code was harder
to understand than the code posted by anton, using numarray?

And, of course, if this code were for anything non-throw-awayable,
there would've been quite a bit of explaining going on between those
lines of code.

Ok, now back to being polite :)

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
Hay m?s d?as que longanizas. 
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From exogen at gmail.com  Sat Feb 19 18:00:32 2005
From: exogen at gmail.com (Brian Beck)
Date: Sat, 19 Feb 2005 18:00:32 -0500
Subject: [perl-python] exercise: partition a list by equivalence
In-Reply-To: <37pb5jF5fnfivU1@individual.net>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<1108814276.680736.264380@l41g2000cwc.googlegroups.com>
	<37pb5jF5fnfivU1@individual.net>
Message-ID: <cv8gju$1tu$1@eeyore.INS.cwru.edu>

Reinhold Birkenfeld wrote:
> def merge(pairings):
>     sets = {}
>     for x1, x2 in pairings:
>         newset = (sets.get(x1, frozenset([x1]))
>                   | sets.get(x2, frozenset([x2])))
>         for i in newset:
>             sets[i] = newset
> 
>     return [list(aset) for aset in set(sets.itervalues())]

Looks good. I used it as inspiration for this new one, which takes less 
time for large datasets, and especially for those where a good number of 
merges are expected (at least that looks to be the pattern; with some 
large datasets this takes less than a quarter of the time as the one 
above). I'm sure it can be improved still -- yours is still faster in 
many cases.

def merge2(pairings):
     elements = {}
     sets = []
     for x1, x2 in pairings:
         i = [elements.get(x1, -1), elements.get(x2, -1)]
         i.sort()
         if i[1] == -1:
             i[1] = len(sets)
             sets.append(set([x1, x2]))
         elif i[0] == -1:
             sets[i[1]] |= set([x1, x2])
         elif i[0] == i[1]:
             continue
         else:
             sets[i[1]] |= sets[i[0]]
             sets[i[0]].clear()

         for x in sets[i[1]]:
            elements[x] = i[1]

     return [list(s) for s in sets if s]

# Comparison
import profile
import random

# Play with these values
xMax, nPairs = 1000, 5000

l = [[random.randint(0, xMax), random.randint(0, xMax)] for i in 
range(nPairs)]

print 'merge2:'
profile.run('merge2(l)') # Mine

print 'merge:'
profile.run('merge(l)') # Reinhold's

--
Brian Beck
Adventurer of the First Order


From tolot at jupiter.solar-empire.de  Thu Feb  3 05:28:09 2005
From: tolot at jupiter.solar-empire.de (Marc Christiansen)
Date: Thu, 3 Feb 2005 11:28:09 +0100
Subject: Finding user's home dir
References: <5i9rtc.rq31.ln@orion.homeinvalid>
	<mailman.1800.1107419518.22381.python-list@python.org>
Message-ID: <pua9d2-hae.ln1@halut.solar-empire.de>

Miki Tebeka <miki.tebeka at zoran.com> wrote:
> Hello Nemesis,
> 
>> Hi all, I'm trying to write a multiplatform function that tries to
>> return the actual user home directory.
>> ...
> What's wrong with:
>    from user import home
> which does about what your code does.

Except it also execfile()s $HOME/.pythonrc.py, which might not be wanted. 

Saluton
  Marc


From theller at python.net  Fri Feb 18 15:28:25 2005
From: theller at python.net (Thomas Heller)
Date: Fri, 18 Feb 2005 21:28:25 +0100
Subject: unicode encoding usablilty problem
References: <opsmekm2ei6yt6e7@news.cisco.com>
	<42164d01$0$4676$9b622d9e@news.freenet.de>
Message-ID: <d5uxzk7q.fsf@python.net>

=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?= <martin at v.loewis.de> writes:

> We have come up with a transition strategy, allowing existing
> libraries to widen their support from byte strings to character
> strings. This isn't a simple task, so many libraries still expect
> and return byte strings, when they should process character strings.
> Instead of breaking the libraries right away, we have defined
> a transitional mechanism, which allows to add Unicode support
> to libraries as the need arises. This transition is still in
> progress.
>
> Eventually, the primary string type should be the Unicode
> string. If you are curious how far we are still off that goal,
> just try running your program with the -U option.

Is it possible to specify a byte string literal when running with the -U option?

Thomas


From nytimes at swiftdsl.com.au  Thu Feb 17 09:19:44 2005
From: nytimes at swiftdsl.com.au (news.sydney.pipenetworks.com)
Date: Fri, 18 Feb 2005 01:19:44 +1100
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <87psyz8h9o.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<37hqlrF59l2b2U1@individual.net>
	<873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<421450CC.9080504@swiftdsl.com.au>
	<87psyz8h9o.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
Message-ID: <4214A800.4010509@swiftdsl.com.au>

Nick Vargish wrote:
> "news.sydney.pipenetworks.com" <nytimes at swiftdsl.com.au> writes:
> 
> 
>>Really ? Then why are you using python.
> 
> 
> Try "import this" at a Python prompt. I didn't invent "Explicit is
> better than implicit."
> 

Thanks for the pointer. Let's see how many zen points are for the OP's 
idea vs against

Against
Explicit is better than implicit.
Special cases aren't special enough to break the rules.

On the wall
Errors should never pass silently.
In the face of ambiguity, refuse the temptation to guess.
There should be one-- and preferably only one --obvious way to do it.
Although that way may not be obvious at first unless you're Dutch.
Now is better than never.
Although never is often better than *right* now.
Namespaces are one honking great idea -- let's do more of those!

For
Beautiful is better than ugly.
Simple is better than complex.
Complex is better than complicated.
Flat is better than nested.
Sparse is better than dense.
Readability counts.
Although practicality beats purity. Unless explicitly silenced.
If the implementation is hard to explain, it's a bad idea.
If the implementation is easy to explain, it may be a good idea.

Well this is clearly a goer ;-)

>>Python or most dynamic languages are are so great because of their
>>common sense towards the "implicit".
> 
> 
> Python is not "most dynamic languages", and does not seem to
> implicitly "cast" objects into other types. Python may be "dynamic",
> but it's also "strongly typed", a feature I consider a benefit, though
> you are of course free to disagree.
> 
> 
>>c = "%s%s" % (a, b)
>>There is an implicit str(b) here.
> 
> 
> Not if you read the docs, as another poster has pointed out.
> 
>>''.join(["string", 2]) to me is no different then the example above.
> 
> 
> TypeError: sequence item 1: expected string, int found
> 
> Which pretty much supports my initial argument -- if a non-string got
> into the list, something needs to be fixed, and it isn't the behavior
> of the join() method!
> 
> Nick




From eurleif at ecritters.biz  Wed Feb 23 15:38:54 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Wed, 23 Feb 2005 15:38:54 -0500
Subject: On eval and its substitution of globals
In-Reply-To: <1109187171.586056.216950@l41g2000cwc.googlegroups.com>
References: <1108828170.372593.150790@g14g2000cwa.googlegroups.com>
	<1109136736.670038.236040@z14g2000cwz.googlegroups.com>
	<421c7423$1_1@newspeer2.tds.net>
	<1109187171.586056.216950@l41g2000cwc.googlegroups.com>
Message-ID: <3847qgF5l61aqU1@individual.net>

Paddy wrote:
> I had to do as you suggest but I was thinking either it was a kludge,
>  and there should be a 'deep' substitution of globals, or that there
> was a good reason for it to work as it does and some magician would
> tell me.

If there was deep substitution of globals, how would functions imported 
from different modules behave? Consider this:

--- foo.py ---
from bar import func

data = 24

print func()
print eval('func()', globals(), locals())

--- bar.py ---
data = 42

def func():
     return data

--------------------------------------------------------------------

If globals were deeply substituted when using eval, the program would 
presumably print "42\n24", which would be far from intuitive. If you 
limit the deep substitution to functions in the same module, you're 
creating a confusing special case.


From nav+posts at bandersnatch.org  Wed Feb 23 14:43:59 2005
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: Wed, 23 Feb 2005 14:43:59 -0500
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cvaoft$av6$1@usenet.otenet.gr>
	<874qg6937w.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<cvcv9b$nbm$1@usenet.otenet.gr> <37uk2kF5gv38bU1@individual.net>
	<nmSSd.25321$Am3.782245@news20.bellglobal.com>
	<cvi2c5$ibu$1@usenet.otenet.gr> <421c91c8$0$44647$a1866201@visi.com>
	<cvi5s1$4l5$1@usenet.otenet.gr> <383qkkF5k6rf4U1@individual.net>
	<8BIQdyL$iLHCFw9a@objmedia.demon.co.uk>
	<421CC14A.4050708@lazaridis.com>
Message-ID: <87ekf76ozk.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>

Ilias Lazaridis <ilias at lazaridis.com> writes:

> Guido is the one, who should care by time about the status of the
> python-community.

That one crashed my parser.

> Thank's for every bit of contribution, which has made this thread an
> worthfull insight into the python-community.

To really get a sense of the Python "community" (at least the Usenet
branch), you should see how it responds to typical questions and
requests for help. The response you received is not really typical,
because your attitude has been atypical.

Just sayin',

Nick

-- 
#  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this to a python
print reduce(lambda x,y:x+chr(ord(y)-1),' Ojdl!Wbshjti!=obwAcboefstobudi/psh?')


From phil at riverbankcomputing.co.uk  Sun Feb 20 15:57:07 2005
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Sun, 20 Feb 2005 20:57:07 +0000
Subject: PyQt Python Bindings for Qt v3.14 Released
In-Reply-To: <1108932142.624423.64060@o13g2000cwo.googlegroups.com>
References: <mailman.2854.1108891957.22381.python-list@python.org>
	<1108932142.624423.64060@o13g2000cwo.googlegroups.com>
Message-ID: <200502202057.08005.phil@riverbankcomputing.co.uk>

On Sunday 20 February 2005 8:42 pm, Simon John wrote:
> All looks like good news, especially PyQt4 - one question, if it's
> statically linked with Qt4, will it still work with things like py2exe?

Should do.

> I guess it just won't need qt-mt4.dll?

The binary will be provided for the Windows GPL version just to make it as 
easy as possible for people to get started. Obviously the source will also be 
available to build it yourself if you need to.

> I'm getting a 404 on the new SIP:
>
> http://www.river-bank.demon.co.uk/download/QScintilla/qscintilla-1.61-gpl-1
>.5.tar.gz

Should be fixed now - thanks.

Phil


From FBatista at uniFON.com.ar  Mon Feb 21 13:29:24 2005
From: FBatista at uniFON.com.ar (Batista, Facundo)
Date: Mon, 21 Feb 2005 15:29:24 -0300
Subject: ANNOUNCE: SiGeFi v0.3
Message-ID: <A128D751272CD411BC9200508BC2194D053C7FFB@escpl.tcp.com.ar>


We're proud to announce the 0.3 version of SiGeFi, which you can find
at:

	http://sourceforge.net/projects/sigefi

	
What is SiGeFi?
---------------

SiGeFi is a Financial Management System, with focus in the needs of
the administration of the money in each personal life and house.

Always keeping the easy usage and concepts, SiGeFi has features of a 
complex Management system:

- Complies with Double Entry Accounting

- Has a Budget-based Money Distribution system

- Allow to make Loans between accounts (with associated financial
  costs)

And of course, it's completely written in Python (didn't decided the
GUI yet).


What is in this version?
------------------------

Functionality change:
- Added the LoanChecker, a programmable asynchronous alert that verifies
  the loans due date.

Internal changes:
- Ended the docstrings, and generated the classes documentation using
  epydoc (that soon will be published in the web as part of its content).
- Translated all the code texts to English, and did the gettext integration,
  so now SiGeFi is multilanguage (so far we have English and Spanish only).
- Bugfixing.

Specified the SiGeFi graphic interface. In the manual-gui.html document we
described each window's functionality, and also we added an image for each
one, so if you want to have a preview of how the GUI will look, there you
have it).

See roadmap.txt to find out the milestone for each version.

Be aware that most of the documentation is not translated yet, it's only
in Spanish.


What can I expect for the next version?
---------------------------------------

To us to finish the GUI (with all that that implies) and some other
improvements:

- See if we replace the PersitentDict with a shelve.
- Study the consistency controls of Pickle, and implement some if
  necessary.
- Define the boot procedure and code it in config.py.
- Set up the web page.


How can I help?
---------------

In a thousand ways, there's a lot of things to do: documentation,
fixing code, translations, set up the web page, etc...

If you want to participate, send us a mail to the list 
(sigefi-list at lists.sourceforge.net) or directly to us.


Thank you.

.    Facundo

Bit?cora De Vuelo: http://www.taniquetil.com.ar/plog
PyAr - Python Argentina: http://pyar.decode.com.ar/

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From snail at objmedia.demon.co.uk  Mon Feb 14 09:50:42 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Mon, 14 Feb 2005 14:50:42 +0000
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq1he$cd7$1@news1.ucsd.edu>
Message-ID: <RXU7YhRCrLECFwBD@objmedia.demon.co.uk>

Hi Robert,

>Note that this reaction is pretty specific to you and not to other 
>newcomers.

I couldn't agree more. This guy is amazing, I think he is an AI or 
nowhere near as bright as he thinks he is. Seems to get the same 
reaction regardless of newsgroup or language. His reaction to the Ruby 
crowd almost seemed incendiary - pretty much accused them of having a 
lame language.

>Most newcomers do not carry around a sense of entitlement that could 
>flatten a small village.

That has to rate as one of the funniest things I've read on usenet in 
years.

Cheers

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From snail at objmedia.demon.co.uk  Mon Feb 14 09:51:13 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Mon, 14 Feb 2005 14:51:13 +0000
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq1he$cd7$1@news1.ucsd.edu>
	<cuq5du$k7g$1@usenet.otenet.gr>
Message-ID: <Xn86U7RhrLECFwD4@objmedia.demon.co.uk>

In message <cuq5du$k7g$1 at usenet.otenet.gr>, Ilias Lazaridis 
<ilias at lazaridis.com> writes
>>  And yet there is not one company that has someone devoted full-time 
>>to  developing Python. Not even Guido.
>
>Who's "Guido"?

LOL Falling off my chair!!!!!!
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From ncoghlan at iinet.net.au  Sat Feb 26 02:05:37 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 26 Feb 2005 17:05:37 +1000
Subject: rounding problem
In-Reply-To: <1109221152.118191.136510@f14g2000cwb.googlegroups.com>
References: <gu6dnWNLB-FHuoDfRVn-tA@comcast.com>	<pan.2005.02.24.03.50.24.914208@comcast.net>
	<1109221152.118191.136510@f14g2000cwb.googlegroups.com>
Message-ID: <42201FC1.3010503@iinet.net.au>

Dan Bishop wrote:
> Your statement is misleading, because it suggests that your processor
> stores digits.  It doesn't; it stores *bits*.

And where does the word 'bit' come from, hmm? It couldn't possibly be an 
abbreviation of Binary digIT, could it?

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From sjmachin at lexicon.net  Tue Feb 22 18:30:21 2005
From: sjmachin at lexicon.net (John Machin)
Date: 22 Feb 2005 15:30:21 -0800
Subject: intersection of 2 list of pairs
In-Reply-To: <1109109223.632208.191040@o13g2000cwo.googlegroups.com>
References: <1108920276.253388.23590@f14g2000cwb.googlegroups.com>
	<4219d31b$0$17249$8fcfb975@news.wanadoo.fr>
	<1109025988.849629.318130@z14g2000cwz.googlegroups.com>
	<1109109223.632208.191040@o13g2000cwo.googlegroups.com>
Message-ID: <1109115021.707553.59210@f14g2000cwb.googlegroups.com>


bearophileH... at lycos.com wrote:
> The use of frozenset can okay when sub-sequences are longer, but for
> this problem it's slow, and anyway there are situations of repeated
> data like this that have to be considered:

Not just for frozenset; this has to be considered whatever the
representation.

>
> frozenset( ('a', 'a') )
> ==>
> frozenset(['a'])
>
> For Py2.4 the faster and better solution seems Peter Otten one.
> James Stroud solution is O(n^2) and it can become slow for long
> lists...

"Better"? In what sense? My point is that the OP's real problem
requires (a) a workable canonical representation of a pair  -- lack of
this is most probably the root cause of the problem that he is trying
to solve!! -- and (b) a result that identifies the duplicate pairs
unambiguously so that he can do something with them.

"Faster"? The solutions proposed by Peter and James do more-or-less
answer the OP's ill-formed question, but speed should be the last
consideration, after the real problem is defined carefully.



From benjamin.cordes at blawrc.de  Mon Feb 14 12:27:23 2005
From: benjamin.cordes at blawrc.de (benjamin.cordes at blawrc.de)
Date: 14 Feb 2005 09:27:23 -0800
Subject: nested lists as arrays
References: <1108384089.804375.179130@f14g2000cwb.googlegroups.com>
	<42109efc$0$23451$626a14ce@news.free.fr>
Message-ID: <1108402043.941832.34110@f14g2000cwb.googlegroups.com>

Thanks for the code.
What I want to do is this:
I want to solve the block puzzle problem.  The problem is as follows:
You have a nxn Array of Numbers and one empty space. Now you there are
up to four possible moves: up, right, down and left, so that each
neighbour of the empty slot can be moved there.

The method getEmptySlot is for getting the empty slot. The method
getPossibleMoves returns the possible moves. Perfoming a move is
swaping one element with the empty slot marked as -1.

The full executable code is appended.
The expected behaviour is that when the move is performed the
appropiate elements should be swaped. But for some reason every now and
then it swaps the wrong elements.

# Puzzle.py
# class for a sliding block puzzle

# an starting state of a 8-puzzle could look like the following:
# ------------
# | 7  2  4  |
# |          |
# | 5  X  6  |
# |          |
# | 8  3  1  |
# ------------

# the goal is to reach this state:
# ------------
# | X  1  2  |
# |          |
# | 3  4  5  |
# |          |
# | 6  7  8  |
# ------------

import random
import copy

class Puzzle:

    def __init__(self, dim):
       self.dim = dim
#       self.elements = {}
#       for column in range(dim):
#           for row in range(dim):
#               elements[(column, row)] = 0
       self.elements = [[0 for column in range(dim)] for row in
range(dim) ]

    def __str__(self):
        s = ""
        i = 0
        j = 0
        while i  <= self.dim-1:
            while j  <= self.dim-1:
                s = s + str(self.elements[j][i])
                j=j+1
                s = s + "\t"
            i=i+1
            j = 0
            s = s + "\n"
        return s

    def compare(self, compareTo):
        if (self.dim != compareTo.dim):
            return 0
        i = 0
        j = 0
        equal = 1
        while i  <= self.dim-1:
            while j  <= self.dim-1:
                 if self.elements[j][i] != compareTo.elements[j][i]:
                     equal = 0
                 j = j+1
            i = i+1
        return equal


    def setAsGoalState(self):
       # create elements of puzzle
       i = 0
       j = 0
       while i <= self.dim-1:
           while j <= self.dim-1:
               self.elements[j][i] = i*3+j
               j=j+1
           j=0
           i=i+1

       # create empty element seperately
       self.elements[0][0] = -1


    def setRandomState(self):
       # container for the elements to pick from
       container = [1,2,3,4,5,6,7,8,-1]

       # create elements of puzzle randomly
       i = 0
       j = 0
       while i <= self.dim-1:
           while j <= self.dim-1:
               if len(container) > 0:
                   randomindex = random.randint(0,len(container)-1)
                   self.elements[j][i] = container[randomindex]
                   del container[randomindex]
                   j=j+1
               else:
                   break
           j=0
           i=i+1

    def getEmptySlot(self):
        i = 0
        j = 0
        while i  <= self.dim-1:
            while j  <= self.dim-1:
                if self.elements[j][i] == -1:
                    return [j, i]
                j = j+1
            j = 0
            i = i + 1

    def performMove(self, direction):
        slot = self.getEmptySlot()

        if (direction == "up"):
            self.swapElements(slot[1], slot[0], slot[1]+1, slot[0])

        elif (direction == "down"):
            self.swapElements(slot[1], slot[0], slot[1]-1, slot[0])

        elif direction == "left":
            self.swapElements(slot[1], slot[0], slot[1], slot[0]-1)
        elif (direction == "right"):
            self.swapElements(slot[1], slot[0], slot[1], slot[0]+1)

    def swapElements(self, fromx, fromy, tox, toy):
        dummy = self.elements[toy][tox]

        self.elements[toy][tox] = self.elements[fromy][fromx]
        self.elements[fromy][fromx] = dummy


    def getChildren(self):
        moves = self.getPossibleMoves()
        self.children = []
        for eachMove in moves:
            newchild = copy.copy(self.performMove(eachMove))
            try:
                self.children.append(newchild)
            except:
                print "Exception: " + str(len(self.children))

    def getPossibleMoves(self):
        emptySlot = self.getEmptySlot()
        y = emptySlot[1]
        x = emptySlot[0]
        north = (y == 0)
        south = (y == (self.dim-1))
        west = (x == 0)
        east = (x == (self.dim-1))

        middle = not(north or south or west or east)

        northwest = north and west
        northeast = north and east
        southwest = south and west
        southeast = south and east
        # orientation has to be distinct
        # save original values
        orignorth = north
        origsouth = south
        # original north or south
        orignors = north or south

        north = north and not (west or east)
        south = south and not (west or east)
        west = west and not (orignors)
        east = east and not (orignors)

        if middle:
            return ["up", "down", "left", "right"]
        elif north:
            return ["up", "left", "right"]
        elif south:
            return ["down", "left", "right"]
        elif west:
            return ["up", "down", "left"]
        elif east:
            return ["up", "down", "right"]
        elif northwest:
            return ["up", "left"]
        elif northeast:
            return ["up", "right"]
        elif southwest:
            return ["down", "left"]
        elif southeast:
            return ["down", "right"]

# ~Puzzle.py

# SolvePuzzleAgent.py
# imports
from Puzzle import *
from Tree import *
import bintree

# set up puzzle
puzzle = Puzzle(3)
puzzle.setRandomState()
goalpuzzlestate = Puzzle(3)
goalpuzzlestate.setAsGoalState()
print "goal state of the puzzle: "
print str(goalpuzzlestate)
print "start state of the puzzle: "
print str(puzzle)
#start search
tree = bintree.BinaryTree()

done = 0
currentBranch = 0
while not done:
    tree.insert(puzzle)
    # get the fringe
    moves = puzzle.getPossibleMoves()
    children = puzzle.getChildren()
    #print "possible moves: " + str(moves)
    print "moving: " + str(moves[currentBranch])
    puzzle.performMove(moves[currentBranch])

    # test if we're have reached the goal state
    done = puzzle.compare(goalpuzzlestate)
    print "done ? : " + str(done)
    print "state:\n" + str(puzzle)
    done = 1


print "search tree: " + str(tree.inorder())

# bintree.py
# a binary tree
class Node:
    def __init__(self, val, left=None, right=None):
        self.val = val
        self.left = left
        self.right = right

class BinaryTree:
    def __init__(self):
        self.root = None

    def insert(self, val):
        root = self.root
        lastdir = None
        while root:
            lastroot = root
            if val <= root.val:
                lastdir = 'left'
                root = root.left
            else:
                lastdir = 'right'
                root = root.right
        new = Node(val)
        if lastdir is None:
            self.root = new
        elif lastdir == 'left':
            lastroot.left = new
        else:
            lastroot.right = new

    def insertList(self, list):
        for x in list:
            self.insert(x)


    def inorder(self):
        result = []
        self.__helper(self.root, result)
        return result

    def __helper(self, root, result):
        if root is not None:
            self.__helper(root.left, result)
            result.append(root.val)
            self.__helper(root.right, result) 

# ~bintree.py



From danperl at rogers.com  Wed Feb 16 11:55:46 2005
From: danperl at rogers.com (Dan Perl)
Date: Wed, 16 Feb 2005 11:55:46 -0500
Subject: more os.walk() issues... probably user error
References: <cuvr5b$2ei$1@solaris.cc.vt.edu> <cuvsmi$4bb$1@solaris.cc.vt.edu>
Message-ID: <zYSdnQZ155-J5o7fRVn-qQ@rogers.com>


"rbt" <rbt at athop1.ath.vt.edu> wrote in message 
news:cuvsmi$4bb$1 at solaris.cc.vt.edu...
> rbt wrote:
>> This function is intended to remove unwanted files and dirs from 
>> os.walk(). It will return correctly *IF* I leave the 'for fs in 
>> fs_objects' statement out (basically leave out the entire purpose of the 
>> function).
>>
>> It's odd, when the program goes into that statment... even when only a 
>> 'pass', and nothing else is present, nothing is returned. Why is that? 
>> I'm testing Python 2.4 on Linux x86 and WinXP. Results are the same on 
>> either platform.
>>
>>     def build_clean_list(self, path):
>>
>>         file_skip_list = ['search_results.txt']
>>         dir_skip_list = ['dev', 'proc', 'Temporary Internet Files']
>>
>>         fs_objects = os.walk(path, topdown=True)
>> ##      for fs in fs_objects:
>> ##
>> ##            for f in fs[2]:
>> ##                if f in file_skip_list:
>> ##                    print f
>> ##                    fs[2].remove(f)
>> ##
>> ##            for d in fs[1]:
>> ##                if d in dir_skip_list:
>> ##                    print d
>> ##                    fs[1].remove(d)
>>
>>         return fs_objects
>>
>>
>
> Just to clarify, it's wrong of me to say that 'nothing is returned'... in 
> either case, this is what is returned:
>
> Here's what was returned and its type:
> ----------------------------------------
> <generator object at 0x407dbe4c>
> <type 'generator'>
> ----------------------------------------
>
> But, I can't iterate over the returned object when I descend into the for 
> statement I mentioned above.

What do you mean by not being able to iterate over the returned object? 
What kind of error are you getting?  Have you tried to debug the code?

BTW, os.walk indeed returns a generator.  You should familiarize yourself 
with generators and iterators if you haven't done so yet. 




From dave at pythonapocrypha.com  Thu Feb  3 20:37:30 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Thu, 03 Feb 2005 18:37:30 -0700
Subject: OT: why are LAMP sites slow?
In-Reply-To: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
Message-ID: <4202D1DA.1030805@pythonapocrypha.com>

Paul Rubin wrote:
> How would you go about building such a site?  Is LAMP really the right
> approach?

Two major problems I've noticed, don't know if they are universal, but they sure 
hurt the performance:

1) Some sites have not put any thought into caching - i.e. the application 
server is serving up images or every single page is dynamically generated even 
though all (or most) of it is static such that most of the requests just aren't 
cacheable.

2) Because a database is there, it gets used, even when it shouldn't, and it 
often gets used poorly - bad or no connection pooling, many trips to the 
database for each page generated, no table indices, bizarro database schemas.

Overall I'd say my first guess is that too much is being generated on the fly, 
often because it's just easier not to worry about cacheability, but a good web 
cache can provide orders of magnitude improvement in performance, so it's worth 
some extra thought.

One project we had involved the users navigating through a big set of data, 
narrowing down the set by making choices about different variables. At any point 
it would display the choices that had been made, the remaining choices, and the 
top few hits in the data set. We initially thought all the pages would have to 
be dynamically generated, but then we realized that each page really represented 
a distinct and finite state, so we went ahead and built the site with Zope + 
Postgres, but made it so that the URLs were input to Zope and told what state to 
generate.

The upshot of all this is that we then just ran a web spider against Zope any 
time the data changed (once a week or so), and so the site ended up "feeling" 
pretty dynamic to a user but pretty much everything came straight out of a cache.

-Dave


From stefan.behnel-n05pAM at web.de  Fri Feb 11 08:16:08 2005
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Fri, 11 Feb 2005 14:16:08 +0100
Subject: frozenset() without arguments should return a singleton
Message-ID: <cuj06r$ep5$1@lnx107.hrz.tu-darmstadt.de>

Hi!

frozenset() doesn't behave as the other immutable empty data types in 2.4:

.>>> '' is ''
True
.>>> () is ()
True
.>>> frozenset() is frozenset()
False

.>>> id(()),id(())
(1077579820, 1077579820)
.>>> id(())
1077579820
.>>> id(frozenset()),id(frozenset())
(1077581296, 1077581296)
.>>> id(frozenset())
1077581440
.>>> id(frozenset(()))
1077582256

frozenset() called without arguments (or on empty sequences) should always 
return a singleton object. It is immutable, so I can't see a reason why it 
should take up more resources than necessary.

Stefan


From kartic.krishnamurthy at gmail.com  Wed Feb  9 13:36:17 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 9 Feb 2005 10:36:17 -0800
Subject: Python and version control
In-Reply-To: <mailman.2261.1107973075.22381.python-list@python.org>
References: <mailman.2261.1107973075.22381.python-list@python.org>
Message-ID: <1107974177.185855.87210@f14g2000cwb.googlegroups.com>

I use PVCS for version control and use IDLE or Vim (depending on my
mood :-)) to write the programs.

So far I have had no issues, works pretty well. Somehow, and it is just
me, I don't care much for version control integrated with the IDE.

Thanks,
-Kartic



From eddie at holyrood.ed.ac.uk  Mon Feb 28 09:38:00 2005
From: eddie at holyrood.ed.ac.uk (Eddie Corns)
Date: Mon, 28 Feb 2005 14:38:00 +0000 (UTC)
Subject: Trees
References: <mailman.3035.1109311254.22381.python-list@python.org>
Message-ID: <cvvac8$a41$1@scotsman.ed.ac.uk>

Alex Le Dain <alex at psi.com.au> writes:

>Is there a generic "tree" module that can enable me to sort and use 
>trees (and nodes). Basically having methods such as .AddNode(), 
>.GetAllChildren(), .FindNode() etc.

http://newcenturycomputers.net/projects/rbtree.html

might do most of what you want.

Eddie


From theller at python.net  Tue Feb 15 11:29:24 2005
From: theller at python.net (Thomas Heller)
Date: Tue, 15 Feb 2005 17:29:24 +0100
Subject: PythonCard and Py2Exe
References: <1108476282.790371.155670@l41g2000cwc.googlegroups.com>
	<mailman.2620.1108476543.22381.python-list@python.org>
	<1108484617.908022.280320@l41g2000cwc.googlegroups.com>
Message-ID: <acq57pnf.fsf@python.net>

PipedreamerGrey at yahoo.com writes:

> For this setup file, the executable packs, but when I attempt to run
> the program, the screen flashes, " cannot import name radiogroup ".
> I've attempted adding "import radiogroup", "from Pythoncard import
> radiogroup" and  "from Pythoncard.compnents import radiogroup"  to the
> setup file, and that doesn't help.  It simply terminates with no error.
>  I've tried removing all references to radiogroup from the script's
> resource file, but that defeats the purpose, as the list box is central
> to the script's use.
>
> My computer runs the script fine, so the radiogroup module must be
> there.  I must just have the imports written wrong.

You should move these 'import ...' statements to your *script* so that
py2exe doesn find them, not to the setup script.

Thomas


From hanser at club-internet.fr  Sun Feb 13 02:05:59 2005
From: hanser at club-internet.fr (Pierre Hanser)
Date: Sun, 13 Feb 2005 08:05:59 +0100
Subject: For American numbers
In-Reply-To: <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
References: <420e7376$1@nntp0.pdx.net> <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
Message-ID: <420efc57$0$5212$7a628cd7@news.club-internet.fr>

Peter Hansen wrote:
> Scott David Daniels wrote:
> 
>> Kind of fun exercise (no good for British English).
>>
>>     def units(value, units='bytes'):
>>         magnitude = abs(value)
>>         if magnitude >= 1000:
>>             for prefix in ['kilo mega giga tera peta '
>>                            'exa zetta yotta').split():
>>                 magnitude /= 1000.
>>                 if magnitude < 1000.:
>>                     break
> 
> 
> Only for hard drive manufacturers, perhaps.
> 
> For the rest of the computer world, unless I've missed
> a changing of the guard or something, "kilo" is 1024
> and "mega" is 1024*1024 and so forth...
> 
> -Peter
even for cpu frequency?


From francis.girard at free.fr  Mon Feb  7 17:04:18 2005
From: francis.girard at free.fr (Francis Girard)
Date: Mon, 7 Feb 2005 23:04:18 +0100
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <5LidnYdVFsfafprfRVn-qA@comcast.com>
References: <dvOMd.33656$EG1.19314@lakeread04>
	<mailman.2112.1107811696.22381.python-list@python.org>
	<5LidnYdVFsfafprfRVn-qA@comcast.com>
Message-ID: <200502072304.18658.francis.girard@free.fr>

Le lundi 7 F?vrier 2005 22:53, Steven Bethard a ?crit?:
> Francis Girard wrote:
> > I see. I personnaly use them frequently to bind an argument of a function
> > with some fixed value. Modifying one of the example in
> > http://mail.python.org/pipermail/python-list/2004-December/257990.html
> > I frequently have something like :
> >
> > SimpleXMLRPCServer.py:  server.register_1arg-place_function(lambda x:
> > x+2, 'add2')
>
> PEP 309 has already been accepted, so I assume it will appear in Python
> 2.5:
>
>      http://www.python.org/peps/pep-0309.html
>
> Your code could be written as:
>
>      server.register_1arg-place_function(partial(operator.add, 2))
>
> If your task is actually what you describe above -- "to bind an argument
> of a function with some fixed value"[1] -- then in general, you should
> be able to write this as[2]:
>
>      function_with_fixed_value = partial(function, fixed_value)
>

Great ! Great ! Great !
Really, Python is going in the right direction all of the time !
Very good news.

Regards

Francis Girard

>
> Steve
>
> [1] As opposed to binding a name to be used in an _expression_ as you do
> in your example.
>
> [2] The partial function can also be used to fix multiple argument
> values and keyword argument values, if that's necessary for your purposes.



From mefjr75 at hotmail.com  Wed Feb  2 19:42:30 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 2 Feb 2005 16:42:30 -0800
Subject: global variables
References: <1107385488.822768.317250@l41g2000cwc.googlegroups.com>
	<1107388493.465599.140480@g14g2000cwa.googlegroups.com>
	<3YSdnYVEmOCW8pzfRVn-sg@comcast.com>
Message-ID: <1107391350.933650.321440@z14g2000cwz.googlegroups.com>

Steve,
Yes I agree ;) Never use builtin names.
I know better but missed it somehow.
I apologize for any confusion I may have caused.
Thank you Steve for the correction.
M.E.Farmer

Steven Bethard wrote:
> M.E.Farmer wrote:
> > alex wrote:
> >> is it possible to create 'global' variables that can be seen in
all
> >> other classes?
> >
> > What about using a class?
> >
> > Py> class globalVar:
> > ...    pass
> >
> > Py> globals = globalVar()
>
> Probably naming it something other than 'globals' would be a good
idea
> -- otherwise you'll hide the builtin globals() function.
>
> But I agree that the attributes of a class instance (as you suggest)
or
> the attributes of a module (as Steve Holden suggests) is probably the
> right way to go.
> 
> Steve



From sjmachin at lexicon.net  Wed Feb  9 07:05:08 2005
From: sjmachin at lexicon.net (John Machin)
Date: 9 Feb 2005 04:05:08 -0800
Subject: Java Integer.ParseInt translation to python
In-Reply-To: <mailman.2222.1107909486.22381.python-list@python.org>
References: <008d01c507f4$451d9b30$2820790d@stso.xcdg.xerox.com>
	<372a762405013116263a4e93b7@mail.gmail.com>
	<mailman.2222.1107909486.22381.python-list@python.org>
Message-ID: <1107950708.037808.211570@l41g2000cwc.googlegroups.com>


jose isaias cabrera wrote:
> > the question is, how can I make this java (byte) call in python? so
that the
> result would be the right one, "[B at 1616c7"
>

Let's get this straight: you have 40 hex digits; both your Java code
and your Python code each do 20 iterations, printing the 20 bytes that
you have composed.
They print the same bytes; the Java code is printing the 3rd column as
a signed 8-bit integer; some Python code (*NOT*, as Nick has pointed
out, the code that you posted) is printing the actual byte (in some
encoding or other).

However some Java code (I can't believe that it was the Java code that
you posted) has printed NINE bytes which bear no relation that I can
see to any of the TWENTY bytes that the posted Java code should have
stowed in retBuf.

You claim that "[B at 1616c7" is the right answer -- what is the question?
What is it meant to be? Your routine is called PrepareHash; is it
possible that you are seeing these 9 bytes _after_ hashing? Funny
hashing scheme; they usually give 4, 8, 16, etc bytes, but worth an ask
...



From djockheck.nospam at gmx.de  Tue Feb 15 03:52:22 2005
From: djockheck.nospam at gmx.de (Detlef Jockheck)
Date: Tue, 15 Feb 2005 08:52:22 -0000
Subject: calculate with date
Message-ID: <opsl8dlkqreybkhy@ze14.gg>

Hi,

I have a date-string given in format "dd.mm.yyyy". Now I would like to add  
100 days. How can this be solved in python?

ciao
Detlef

-- 
are you ready - attention - go


From zathras at thwackety.com  Sat Feb 12 08:05:23 2005
From: zathras at thwackety.com (Michael Sparks)
Date: Sat, 12 Feb 2005 13:05:23 +0000 (GMT)
Subject: Concurrent Python
In-Reply-To: <f278b213050211091151904389@mail.gmail.com>
Message-ID: <Pine.LNX.4.44.0502121302130.1685-100000@pingu.thwackety.com>

On Fri, 11 Feb 2005, Dominic Fox wrote:
...
> http://www.codepoetics.com/code/concurrent.py
>
> Comments and constructive criticism welcome.

For an alternative approach (based on using generators forming a dataflow
component system) you might find our project interesting - the core
concurrency stuff is packaged up separately with API docs (and trivial
example) here: http://kamaelia.sourceforge.net/Docs/Axon.html

Best Regards,


Michael.



From wittempj at hotmail.com  Thu Feb  3 16:08:00 2005
From: wittempj at hotmail.com (wittempj at hotmail.com)
Date: 3 Feb 2005 13:08:00 -0800
Subject: remove duplicates from list *preserving order*
In-Reply-To: <BfmdnTjWquaJEZ_fRVn-3A@comcast.com>
References: <BfmdnTjWquaJEZ_fRVn-3A@comcast.com>
Message-ID: <1107464880.674728.53390@c13g2000cwb.googlegroups.com>

You could do it with a class, like this, I guess it is a bit faster
than option 1, although I'm no connaisseur of python internals.....
-class uniquelist(list):
-    def __init__(self, l):
-        for item in l:
-            self.append(item)

-    def append(self, item):
-        if item not in self:
-            list.append(self, item)

-l = [1, 1, 2, 3, 3, 4]
-print l
-m = uniquelist(l)
-print m



From deetsNOSPAM at web.de  Sat Feb 19 10:55:13 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sat, 19 Feb 2005 16:55:13 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr> <cv7k8e$4pa$03$1@news.t-online.com>
	<cv7m2m$gp$1@usenet.otenet.gr>
Message-ID: <cv7nh1$b57$03$1@news.t-online.com>

Ilias Lazaridis wrote:

> Diez B. Roggisch wrote:
>>>Should a professional developer take python serious?
> [...] - (ungentle babbling after disrupting coherence of writings)

And that from you.... *lol*

> I mean, if the team does not manage at least the foundation of a
> multi-target automated-build-process?

Repeating nonsense doesn't increase it's validity. Python makes use of
autoconf/automake to support a wide range of platforms and compilers. As
you obviously haven't heard of these and refuse to google, I was so kind to
research the respective links to the tools:

http://www.gnu.org/software/autoconf/
http://www.gnu.org/software/automake/

http://www.amath.washington.edu/~lf/tutorials/autoconf/

Enjoy the read.
 
> [targets need not to be supported directly by the python team. They
> could be added/managed/maintained by community members]

You already found the mingw-patch for building python. It is
added/managed/maintained by community members.

Just out of curiousity: How many python extensions are you planning to
write? And how many lines of pure python code have you written in your
life? 

-- 
Regards,

Diez B. Roggisch


From hwlgw at hotmail.com  Thu Feb 24 17:10:54 2005
From: hwlgw at hotmail.com (Will Stuyvesant)
Date: 24 Feb 2005 14:10:54 -0800
Subject: Python Online Programming Contest
In-Reply-To: <1109278779.955986.193860@z14g2000cwz.googlegroups.com>
References: <1109278779.955986.193860@z14g2000cwz.googlegroups.com>
Message-ID: <1109283053.971905.27670@z14g2000cwz.googlegroups.com>

> [Varun]
> For details about samhita http://www.samhita.info/

"The Madras Institute of Technology (MIT)" it says there.

The MIT acronym is taken already guys..

-- 
no scheme no glory



From leo.hatvani at gmail.com  Sun Feb 20 09:49:33 2005
From: leo.hatvani at gmail.com (Tortelini)
Date: 20 Feb 2005 06:49:33 -0800
Subject: BaseHTTPServer threading using SocketServer.ThreadingMixIn
Message-ID: <1108910973.117326.206390@f14g2000cwb.googlegroups.com>

I am making custom web server using HTTPServer and want to be able to
access it simultaneously from different computers. To achieve
multithreading, I have been experimenting with ThreadingMixIn from
SocketServer, but it doesn't seem to work, when I freeze code in one
instance it seems to be frozen in second one too (I experimented with
time.sleep and while 1 loop). I am using python 2.4 on Windows XP. Does
anyone have any suggestions? Do I need to create HTTPRequestHandler
class anything different from ordinary?



From maxm at mxm.dk  Tue Feb 22 02:56:08 2005
From: maxm at mxm.dk (Max M)
Date: Tue, 22 Feb 2005 08:56:08 +0100
Subject: Copy functio in imaplib
In-Reply-To: <1109049046.015244.121070@l41g2000cwc.googlegroups.com>
References: <1109049046.015244.121070@l41g2000cwc.googlegroups.com>
Message-ID: <421ae563$0$284$edfadb0f@dread12.news.tele.dk>

Raghul wrote:
> What is message_set in the python documentation for copy in imaplib? Is
> they referring message set  to the particular mail message in my inbox
> or something else.
> 
> copy(  	message_set, new_mailbox)
>     Copy message_set messages onto end of new_mailbox.

A sequence of numbers encoded as a string. In one of the forms:

     '1,2,3,4' or '1:4'

The numbers can be either message sequence numbers or uids.

-- 

hilsen/regards Max M, Denmark

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


From juneaftn at gmail.com  Fri Feb  4 23:20:26 2005
From: juneaftn at gmail.com (Kim  Changjune)
Date: 4 Feb 2005 20:20:26 -0800
Subject: bicyclerepairman python24 windows idle :(
In-Reply-To: <cu0f45$knq$1@aphrodite.grec.isp.9tel.net>
References: <cu0f45$knq$1@aphrodite.grec.isp.9tel.net>
Message-ID: <1107577226.960946.106580@l41g2000cwc.googlegroups.com>


EuGeNe wrote:
> Hi there,
>
> I am no expert but wanted to give bicyclerepairman 0.9 a go just to
see
> what a refactoring browser is and does. Followed every step of the
> install, I think, but idle doesn't start with the RepairMan section
in
> config-extensions.def ... is it incompatible with 2.4?
>
> Thanks for your help.
>
> --
> EuGeNe

There seems to be a change in idlelib in Python 2.4.

Apply following patch to BicycleRepairMan_Idle.py:

@@ -87,6 +87,7 @@
             mbar = editwin.menubar
             editwin.menudict[name] = menu = Menu(mbar, name = name)
             mbar.add_cascade(label = label, menu = menu, underline =
underline)
+            self.editwin.fill_menus(self.menudefs)

             # Initialize Bicyclerepairman and import the code
             path = self.editwin.io.filename



From removethis.kartic.krishnamurthy at gmail.com  Fri Feb 11 22:11:04 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Sat, 12 Feb 2005 03:11:04 GMT
Subject: Trouble using telentlib
In-Reply-To: <467fdeba.0502111441.4a558e2a@posting.google.com>
References: <467fdeba.0502111441.4a558e2a@posting.google.com>
Message-ID: <ctePd.1235$H05.294@twister.nyroc.rr.com>

Nitin Chaumal said the following on 2/11/2005 5:41 PM:
> I sarched the existing threads but didnt find an answer to this.
> 
> I am writing simple script which uses telentlib to open a session with
> a unix machine and run "tail -f logfile.txt" on one of the logfiles.
> 
> import telnetlib
> 
> HOST = "192.X.X.X"
> user = "myname"
> password = "mypass"
> 
> tn = telnetlib.Telnet(HOST)
> 
> tn.read_until("login: ")
> tn.write(user + "\n")
> if password:
>     tn.read_until("Password: ")
>     tn.write(password + "\n")
> 
> tn.write("tail -f /tmp/logfile.txt\n")
> 
> # what do i write here ? #
> 
> tn.write("exit\n")
> 

Nitin,

You can not have two writes together. Reads and writes should alternate.

To get the log file this is what you should do:

# Modified my working version for your purpose.
# Hope there are not errors!

def SaveLog(user, password):
     telnet_resp = []
     tn = telnetlib.Telnet(host)

     tn.read_until("login: ")
     tn.write(user + "\n")
     if password:
         telnet_resp.append( tn.read_until("Password: ") )
         tn.write(password + "\n")


     tn.read_until("$ ")
     tn.write("tail -f /tmp/logfile.txt\n")
     telnet_resp.append(tn.read_until("$ "))
     tn.write("exit\n")

     telnet_resp.append(tn.read_all() )
     tn.close()


     telnet_out = open(OUTPUT, 'a')
     telnet_out.write('\n'.join(telnet_resp))
     telnet_out.close()


Alternatively, if your box has FTP access, you can FTP the log file to a 
CStringIO file and operate on it.

Thanks,
-Kartic


From jdadson at yahoo.com  Tue Feb  8 20:57:04 2005
From: jdadson at yahoo.com (Jive Dadson)
Date: Wed, 09 Feb 2005 01:57:04 GMT
Subject: negative integer division
References: <4208039c$0$28559$8fcfb975@news.wanadoo.fr>
Message-ID: <42096EAD.879E8A5F@yahoo.com>

Python does it right.  C is allowed to do it anyway it likes, which was
a stupifyingly horrible decision, IMHO.

Way back when, there was a language named Pascal.  I lobbied the Pascal
standards committee to define the modulus operator correctly, which they
eventually did.  To my astonishment, they proceded to define the
division operator backwards to the modulus operator, so that division
and mod did not play together correctly.  Duh.


From steven.bethard at gmail.com  Fri Feb  4 14:08:37 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 04 Feb 2005 12:08:37 -0700
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <mailman.1905.1107543558.22381.python-list@python.org>
References: <dvOMd.33656$EG1.19314@lakeread04>
	<mailman.1905.1107543558.22381.python-list@python.org>
Message-ID: <LYydnagbw4-vVZ7fRVn-pw@comcast.com>

Mike C. Fletcher wrote:
> Alan McIntyre wrote:
> ...
> 
>> I have a list of items that has contiguous repetitions of values, but 
>> the number and location of the repetitions is not important, so I just 
>> need to strip them out.  For example, if my original list is 
>> [0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5], I want to end up with 
>> [0,1,2,3,2,4,5].
> 
> 
> ...
> 
>> Is there an elegant way to do this, or should I just stick with the 
>> code above?
> 
> 
>  >>> def changes( dataset ):
> ...     last = None
> ...     for value in dataset:
> ...         if value != last:
> ...             yield value
> ...         last = value
> ...        >>> print list(changes(data ))
> 
> which is quite readable/elegant IMO.

But fails if the list starts with None:

py> lst = [None,0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5]
py> def changes(dataset):
...     last = None
...     for value in dataset:
...         if value != last:
...             yield value
...         last = value
...
py> list(changes(lst))
[0, 1, 2, 3, 2, 4, 5]

A minor modification that does appear to work:

py> def changes(dataset):
...     last = object()
...     for value in dataset:
...         if value != last:
...             yield value
...         last = value
...
py> list(changes(lst))
[None, 0, 1, 2, 3, 2, 4, 5]

STeVe


From onurb at xiludom.gro  Mon Feb 14 07:52:11 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Mon, 14 Feb 2005 13:52:11 +0100
Subject: nested lists as arrays
In-Reply-To: <1108384089.804375.179130@f14g2000cwb.googlegroups.com>
References: <1108384089.804375.179130@f14g2000cwb.googlegroups.com>
Message-ID: <42109efc$0$23451$626a14ce@news.free.fr>

benjamin.cordes at blawrc.de wrote:
> Hi,
> 
> why can't I do this:
> 
>         dummy = self.elements[toy][tox]
> 
>         self.elements[toy][tox] = self.elements[fromy][fromx]
>         self.elements[fromy][fromx] = dummy
> 
> after initialising my nested list like this:
> 
>        self.elements = [[0 for column in range(dim)] for row in
> range(dim) ]
> 

Sorry, I'm not psychic enough to guess what is exactly your problem:
- what do you mean "can't do" ?  You have a traceback ? please post it. 
You have unexpected results ? please describe.
- what are self, dim, toy, tox, fromy, fromx ?
- is all that code in the same method ?
- etc etc

So please post more informations if you expect us to help you.


Note that the following code is correct:
 >>> l = [[0 for i in range(3)] for y in range(3)]
 >>> l
[[0, 0, 0], [0, 0, 0], [0, 0, 0]]
 >>> l[0][0] = 1
 >>> l
[[1, 0, 0], [0, 0, 0], [0, 0, 0]]
 >>> l[0][0], l[0][1] = l[0][1], l[0][0]
 >>> l
[[0, 1, 0], [0, 0, 0], [0, 0, 0]]
 >>>

So I guess that your problem has nothing to do with nested lists.

(Also note BTW that, thanks to the magic of multiple assignement, you 
don't need the dummy stuff. The pythonic idiom for swapping 2 bindings is
a, b = b, a)



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for 
p in 'onurb at xiludom.gro'.split('@')])"


From steve at holdenweb.com  Fri Feb  4 11:25:21 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 04 Feb 2005 11:25:21 -0500
Subject: Thread in python
In-Reply-To: <1107534038.823409.89650@l41g2000cwc.googlegroups.com>
References: <1107533540.641969.191940@z14g2000cwz.googlegroups.com>
	<1107534038.823409.89650@l41g2000cwc.googlegroups.com>
Message-ID: <4rNMd.103073$Jk5.93452@lakeread01>

Kartic wrote:

> ajikoe at gmail.com wrote:
> 
>>Hello, is any one knows websites which give a python thread tutorial
> 
> ?
> 
>>Sincerely Yours,
>>Pujo Aji
> 
> 
> Pujo Aji,
> 
> I have not come across a tutorial but found this link rather helpful -
> http://www.faqts.com/knowledge_base/index.phtml/fid/263 - to get
> started.
> 
> Also, there are good recipes in ASPN -
> http://aspn.activestate.com/ASPN/Cookbook/Python?kwd=Threads
> 
> And last but not least, the chapter on Threads in Python Standard
> Library by Fredrik Lundh - http://effbot.org/zone/books.htm
> 
> Thanks,
> -Kartic
> 
http://starship.python.net/crew/aahz/OSCON2001/index.html

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From lars-www at lycos.com  Wed Feb 16 09:36:29 2005
From: lars-www at lycos.com (Lars)
Date: 16 Feb 2005 06:36:29 -0800
Subject: Stable GUI
References: <c0e7fd79.0502160619.565eb40e@posting.google.com>
Message-ID: <1108564589.069982.71680@o13g2000cwo.googlegroups.com>

Hi Viktor,

By fast what do you mean exactly? Imho all the usual gui-toolkits
pythonistas use are quite fast enough for most applications. You can
use Tkinter ofcourse, and with the extra "Tix" module you get lots
widgets. It's not the prettiest toolkit in the world, but it does the
job well.  And it's very programmer friendly.
A step up would be to use wxWindows or Qt (wxPython and pyQt
respectively), both are fast and stable as far as I know, and they are
more powerful than Tk, generally speaking.

Maybe you should describe your particular application and the reasons
why you really need lightspeed widget rendering ? Stability goes
without saying:)

Regards
Lars



From mahs at telcopartners.com  Tue Feb 15 14:12:25 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Tue, 15 Feb 2005 11:12:25 -0800
Subject: Iterator / Iteratable confusion
In-Reply-To: <curt3v$lmf$1@sea.gmane.org>
References: <420a5c1e$0$21630$a1866201@visi.com><slrnd0q67t.52v.curty@einstein.electron.net><200502131848.03655.francis.girard@free.fr>	<200502131958.27410.francis.girard@free.fr><cuolu7$qv7$1@sea.gmane.org>	<cuooip$1pd$1@sea.gmane.org>
	<curt3v$lmf$1@sea.gmane.org>
Message-ID: <cuthdk$dnq$1@sea.gmane.org>

Michael Spencer wrote:
>But, notwithstanding the docs, it is not essential that
>iter(iterator) is iterator

Terry Reedy wrote:
 > iter(iterator) is iterator is part of the iterater protocol
 >
> [...]I interpret [your post] as saying three things:
> 
> 1. "There is more than one possible definition of 'iterator'."

Terry, thanks for responding in depth.


> 2. "It is not essential to not do something wasteful as long as it is 
> otherwise inconsequential."

Not that "iter(iterator) is iterator" is somehow wasteful (actually it seems
conservative), but rather that alternative behavior is readily implmented.  You 
point out, reasonably, that if I do that, then what I get is not then an 
iterator, because it fails to conform with the protocol.

However, I suggest that there may be cases where "iter(iterator) is not 
iterator" is useful behavior.  What to call such an object is another matter.

For example, consider:

import itertools as it
def tee2(iterable):
     class itertee(object):
         def __init__(self, iterator):
             self.iterator = iterator
         def __iter__(self):
             return itertee(self.iterator.__copy__())
         def next(self):
             return self.iterator.next()
     return itertee(it.tee(iterable, 1)[0])

This returns an itertee instance which simply wraps the tee iterator returned by 
  itertools.  However iter(itertee instance) returns a copy of its iterator.  So 
this object creates as many independent iterators over iterable as are required.

In an earlier post in this thread, I included several examples of generating 
infinite series using iterator-copying like this.  I implemented the copying as 
a method of a containing iterable 'Stream', rather than of the iterators 
themselves, partly to respect the 'iterator protocol'.


> 3. "You can substitute a copy of an object that is never mutated for the 
> object itself."
> 
This was not my intended point, although I accept that my example was too abstract.

Cheers

Michael



From dthierbach at usenet.arcornews.de  Sun Feb 20 09:54:29 2005
From: dthierbach at usenet.arcornews.de (Dirk Thierbach)
Date: Sun, 20 Feb 2005 15:54:29 +0100
Subject: lambda closure question
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
	<1108808502.699333.66520@g14g2000cwa.googlegroups.com>
	<mailman.2831.1108814832.22381.python-list@python.org>
	<1108872041.034467.239950@l41g2000cwc.googlegroups.com>
Message-ID: <20050220145429.DF9.0.NOFFLE@dthierbach.news.arcor.de>

Ted Lilley <ted.lilley at gmail.com> wrote:
> As a side note, I'm familiar with the term currying from a friend who
> learned ML and Scheme quite some time ago.  Not sure if that's the true
> origin, but it was a sufficiently different context from Python (or at
> least I thought) that I didn't want to rely on its meaning.  I was also
> sufficiently unsure of it's _exact_ meaning, 

The exact meaning is reasonably well explained, together with the
origins, on Wikipedia:

http://en.wikipedia.org/wiki/Currying

That meaning shouldn't change if applied to different computer languages.
I can understand the temptation to confuse partial application with
currying (for languages like Python which take tuples of arguments
by default, currying is one way to make partial application possible;
supplying default arguments is another), but nonetheless they are different 
things.

- Dirk


From ncoghlan at iinet.net.au  Sat Feb 26 02:26:11 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 26 Feb 2005 17:26:11 +1000
Subject: Canonical way of dealing with null-separated lines?
In-Reply-To: <lc7jkvdcxq.fsf@gaffa.mit.edu>
References: <lcll9efw8l.fsf@gaffa.mit.edu>	<mailman.3006.1109264015.22381.python-list@python.org>	<5aes11d4da95un1n78vtb04m43269hqo4m@4ax.com>	<mailman.3020.1109281886.22381.python-list@python.org>
	<lc7jkvdcxq.fsf@gaffa.mit.edu>
Message-ID: <42202493.9060802@iinet.net.au>

Douglas Alan wrote:
> Okay, here's the definitive version (or so say I).  Some good doobie
> please make sure it makes its way into the standard library:
> 
> def fileLineIter(inputFile, newline='\n', leaveNewline=False, readSize=8192):
>    """Like the normal file iter but you can set what string indicates newline.
> 
>    You can also set the read size and control whether or not the newline string
>    is left on the end of the iterated lines.  Setting newline to '\0' is
>    particularly good for use with an input file created with something like
>    "os.popen('find -print0')".
>    """
>    partialLine = []
>    while True:
>       charsJustRead = inputFile.read(readSize)
>       if not charsJustRead: break
>       lines = charsJustRead.split(newline)
>       if len(lines) > 1:
>          partialLine.append(lines[0])
>          lines[0] = "".join(partialLine)
>          partialLine = [lines.pop()]
>       else:
>          partialLine.append(lines.pop())
>       for line in lines: yield line + ("", newline)[leaveNewline]
>    if partialLine and partialLine[-1] != '': yield "".join(partialLine)
> 
> |>oug

Hmm, adding optional arguments to file.readlines() would seem to be the place to 
start, as well as undeprecating file.xreadlines() (with the same optional 
arguments) for the iterator version.

I've put an RFE (#1152248) on Python's Sourceforge project so the idea doesn't 
get completely lost. Actually making it happen needs someone to step up and 
offer a patch to the relevant C code and documentation, though.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From xah at xahlee.org  Thu Feb 17 18:46:20 2005
From: xah at xahlee.org (Xah Lee)
Date: 17 Feb 2005 15:46:20 -0800
Subject: [perl-python] exercise: partition a list by equivalence
Message-ID: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>

here's another interesting algorithmic exercise, again from part of a
larger program in the previous series.

Here's the original Perl documentation:

=pod

merge($pairings) takes a list of pairs, each pair indicates the
sameness
of the two indexes. Returns a partitioned list of same indexes.

For example, if the input is
merge( [ [1,2], [2,4], [5,6] ] );

that means 1 and 2 are the same. 2 and 4 are the same. Therefore
1==2==4. The result returned is

[[4,2,1],[6,5]];

(ordering of the returned list and sublists are not specified.)

=cut

For those of you unfamiliar with math lingoes, partition a list means
to create sublists, based on some criteria. In our case, the input list
comes in the form of pairs, and its members are the union of all
members in the pairs. The criterion for partition in our case is that
of equivalence, specified in the pairs input.

Try to write a Python code for this. In the Python code, the input
should be a list of couples. (for Perlers, sketch out the algorithm on
paper and try to code in Python directly.)

I'll post Perl & Python code tomorrow.

==This is brought to you by the Perl-Python community.==
== http://xahlee.org/perl-python/python.html ==

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From francis.girard at free.fr  Fri Feb 25 15:15:45 2005
From: francis.girard at free.fr (Francis Girard)
Date: Fri, 25 Feb 2005 21:15:45 +0100
Subject: Splitting strings - by iterators?
In-Reply-To: <pan.2005.02.25.15.55.31.77881@jeremysanders.net>
References: <pan.2005.02.25.15.55.31.77881@jeremysanders.net>
Message-ID: <200502252115.47091.francis.girard@free.fr>

Hi,

Using finditer in re module might help. I'm not sure it is lazy nor 
performant. Here's an example :

=== BEGIN SNAP
import re

reLn = re.compile(r"""[^\n]*(\n|$)""")

sStr = \
"""
This is a test string.
It is supposed to be big.
Oh well.
"""

for oMatch in reLn.finditer(sStr):
  print oMatch.group()
=== END SNAP

Regards,

Francis Girard

Le vendredi 25 F?vrier 2005 16:55, Jeremy Sanders a ?crit?:
> I have a large string containing lines of text separated by '\n'. I'm
> currently using text.splitlines(True) to break the text into lines, and
> I'm iterating over the resulting list.
>
> This is very slow (when using 400000 lines!). Other than dumping the
> string to a file, and reading it back using the file iterator, is there a
> way to quickly iterate over the lines?
>
> I tried using newpos=text.find('\n', pos), and returning the chopped text
> text[pos:newpos+1], but this is much slower than splitlines.
>
> Any ideas?
>
> Thanks
>
> Jeremy



From Serge.Orlov at gmail.com  Sun Feb 13 08:19:02 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: Sun, 13 Feb 2005 13:19:02 +0000 (UTC)
Subject: writing unicode apps in python - some beginner questions.
References: <hEAPd.12154$504.1040055@news20.bellglobal.com>
Message-ID: <cunk46$2sjh$1@news.comcor-tv.ru>

WX wrote:
> (#2) Hindi is not displayed correctly on the screen when the
> "Suplemental language support" parts for Windows XP are not installed,
> in particular in the Regional and Languages  Options panel in the
> Control Panel, you have to check "Install files for complex script and
> right-to-left languages (including Thai)".  This adds Thai, and Indic
> language support.  Does anyone know a programmatic way in Python to
> check for this,so I can pop up a message telling users that support
> for this script hasn't been installed in Windows?

In addition to my previous post you can try the following, more
simple method: try calling setlocale, if Thai support is installed I suspect
you won't get an exception:

>>> import locale
>>> locale.setlocale(locale.LC_ALL,'English')
'English_United States.1252'
>>> locale.setlocale(locale.LC_ALL,'Russian')
'Russian_Russia.1251'
>>> locale.setlocale(locale.LC_ALL,'Thai')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "C:\Python24\lib\locale.py", line 379, in setlocale
    return _setlocale(category, locale)
locale.Error: unsupported locale setting

  Serge.







From dave at pythonapocrypha.com  Thu Feb  3 10:59:32 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Thu, 03 Feb 2005 08:59:32 -0700
Subject: Where is WSAEnumNetworkEvents???
In-Reply-To: <1107376894.420724.260230@c13g2000cwb.googlegroups.com>
References: <1107376894.420724.260230@c13g2000cwb.googlegroups.com>
Message-ID: <42024A64.7090309@pythonapocrypha.com>

elbertlev at hotmail.com wrote:
> I was trying to write an asyncronous TCP server for win32 using
> WSAEventSelect (which lives if win32file). Such events require
> WaitForMultipleObjects (which lives if win32event) and
> WSAEnumNetworkEvents WHICH IS NOT EXPOSED. This makes WSAEventSelect
> useless. Does somebody know how to add the WSAEnumNetworkEvents and
> WSANetwotkEvents structure win32file?
>  
> Maybe I'm missing something?

You could both build the structures and call the functions in ctypes 
(http://starship.python.net/crew/theller/ctypes/)

[untested code follows]

from ctypes import *
class WSANETWORKEVENTS(Structure):
     _fields_ = [('lNetworkEvents', c_long),
                 ('iErrorCode', c_int * 10) # 10 = FD_MAX_EVENTS
                ]

You'd access the API via windll.ws2_32.WSAEnumNetworkEvents, e.g.

networkEvents = WSANETWORKEVENTS()
i = windll.ws2_32.WSAEnumNetworkEvents(s, hEventObject, byref(networkEvents))
if i != 0:
     # Handle an error

HTH,
Dave


From deetsNOSPAM at web.de  Thu Feb  3 08:38:54 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Thu, 03 Feb 2005 14:38:54 +0100
Subject: ModPython: passing variables between handlers?
References: <mailman.1813.1107436865.22381.python-list@python.org>
Message-ID: <36enlsF50l2q1U1@individual.net>

> import modpython
> ....
> def handler():
>    # main part of the application starts here
>    ...
> 
> def authenhandler():
>    ...
>    # Store information about the user in an object
>    u = new User(req.user, pass)


<snip>

> What I'm really looking for is some sort of global dictionary like PHP's
> $REQUEST or $SESSION, which I can assign freely to during the life of
> the request *from anywhere in my application* and which gets cleaned up
> for me automatically afterwards. Does something like this exist in
> mod_python?
> 
> If the approach above isn't possible, what would your recommendations be
> for a solution to this issue?

I have absolutely no experience with mod_python, so take this with a grain
of salt - but you code above suggests that there is a request object: req.
You already use it: req. How about storing u in req like this:

def authenhandler():
   # Store information about the user in an object
   req.u = new User(req.user, pass)




-- 
Regards,

Diez B. Roggisch


From mirandacascade at yahoo.com  Tue Feb 22 23:16:03 2005
From: mirandacascade at yahoo.com (mirandacascade at yahoo.com)
Date: 22 Feb 2005 20:16:03 -0800
Subject: progress bar controls in status.py
Message-ID: <1109132163.786481.143330@f14g2000cwb.googlegroups.com>

O/S - Windows XP Home with Service Pack 2
Vsn of Python: 2.4 (from ActiveState)

This question is with regard to the progress bar controls that are in
the file status.py.  On my workstation, status.py is located in the:

c:\python24\lib\site-packages\pythonwin\pywin\dialogs\

folder.

The only modification I made to status.py was to the demo() method
where I added the type argument and then called either
StatusProgressDialog or ThreadedStatusProgressDialog.  The modified
demo() method looks like this:

def demo(type):
    if type == "threaded":
        d = ThreadedStatusProgressDialog("A Demo", "Doing
something...")
    else:
        d = StatusProgressDialog("A Demo", "Doing something...")

	import win32api
	for i in range(100):
            if i == 50:
	        d.SetText("Getting there...")
		if i==90:
		    d.SetText("Nearly done...")
		win32api.Sleep(20)
		d.Tick()
	d.Close()

Using the interactive window of PythonWin, when I do the following:
>>> import status
>>> status.demo('a')
the results are:
 - a progress bar with title 'A Demo' appears
 - ticks appear within the progress bar
 - the message changes from 'Doing something' to 'Getting there...' to
'Nearly done...'
 - the progress bar no longer appears

Using the interactive window of PythonWin, when I do the following:
>>> import status
>>> status.demo('threaded')
the results are:
 - the cursor position stays immediately to the right of the ')'
character
 - nothing appears on the screen
 - about 10 seconds later the >>> appears, a progress bar control
appears with the title 'A Demo' and text 'Doing something'
 - the progress bar remains visible until I close it by clicking on the
X in the top right corner

My questions are:
1) If I want the behavior of ThreadedStatusProgressDialog to emulate
the behavior of StatusProgressDialog, what changes must I make to
status.py to accomplish that? (assume that I want
ThreadedStatusProgressDialog to remain threaded, i.e. I'm not looking
for an answer along the lines of "if you want the behavior of
ThreadedStatusProgressDialog to emulate the behavior of
StatusProgressDialog, then have it call StatusProgressDialog.")
2) Can you offer any guidelines or rules of thumb regarding when one
would wish to use ThreadedStatusProgressDialog vs using
StatusProgressDialog?



From snail at objmedia.demon.co.uk  Mon Feb 14 10:48:32 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Mon, 14 Feb 2005 15:48:32 +0000
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq1he$cd7$1@news1.ucsd.edu>
	<RXU7YhRCrLECFwBD@objmedia.demon.co.uk>
Message-ID: <pxQVRoWQhMECFw0X@objmedia.demon.co.uk>

In message <RXU7YhRCrLECFwBD at objmedia.demon.co.uk>, Stephen Kellett 
<snail at objmedia.demon.co.uk> writes
>Hi Robert,

Weird, you hit "reply" and the newsreader does a "post". C'est la vie.
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From theller at python.net  Wed Feb  2 07:20:03 2005
From: theller at python.net (Thomas Heller)
Date: Wed, 02 Feb 2005 13:20:03 +0100
Subject: Python for S60 mentioned in a mainstream Finnish e-news website
References: <du7wttrb8wf.fsf@lehtori.cc.tut.fi>
	<du7sm4fb3dg.fsf@lehtori.cc.tut.fi>
Message-ID: <651bduh8.fsf@python.net>

Ville Vainio <ville at spammers.com> writes:

> Of course there is the whole hog and more in the official Nokia press
> release, this time in English:
>
> http://press.nokia.com/PR/200501/978226_5.html
>
> It also paints an accurate and quite positive picture of Python. Now
> we just need ctypes or Symbianic Swig and world domination will be
> ours ;-).
>
> (Yeah, ctypes will probably be a problem because of the way Symbian
> handles DLLs)

How *does* symbian handle DLLs?

Curious,

Thomas


From ncoghlan at iinet.net.au  Sat Feb 19 22:20:21 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 20 Feb 2005 13:20:21 +1000
Subject: [Fwd: Re: [Uuu-devel] languages] <-- Why Python
In-Reply-To: <86r7jdh5vw.fsf@guru.mired.org>
References: <mailman.2781.1108677768.22381.python-list@python.org>	<1108678805.542584.171930@z14g2000cwz.googlegroups.com>	<mailman.2783.1108679758.22381.python-list@python.org>	<864qgaisoq.fsf@guru.mired.org>	<mailman.2785.1108689484.22381.python-list@python.org>	<86vf8qhcql.fsf@guru.mired.org>	<mailman.2787.1108691319.22381.python-list@python.org>
	<86r7jdh5vw.fsf@guru.mired.org>
Message-ID: <421801F5.8090404@iinet.net.au>

Mike Meyer wrote:
> Arich Chanachai <macrocosm at fastmail.fm> writes:
> 
> 
>>Mike Meyer wrote:
>>
>>>Whatever the intentions may be, the *act* is one of dictation. Since
>>>the point of the underlying OS is to increase the interconnections
>>>between applications (assuming I've found the correct web page and
>>>interpreted it correctly), the underlying architecture should be
>>>language-neutral. That allows as many applications as possible to play
>>>in the environment.

*Allowing* other languages is one thing, but that shouldn't preclude having a 
'default' language. On other OS's, the default language is some form of shell 
scripting (i.e. Unix shell scripts, or Windows batch files). It would be good to 
have a real language to fill that role.

> You've missed the point. Allowing a wide array of problem solving
> choices is a goal, not a means. Instead of concentrating on adding
> langauges, you should be provding an infrastructure that makes adding
> langauges simple.  The Plan 9 example does this best, as any language
> that can do file I/O is supported.

Still, the builtin shell is going to need *some* form of scripting support. And 
if that looks like IPython's shell mode, so much the better.

Anyway, the reason to prefer Python to LISP for something like this, is that 
Python reads much more naturally for most people, whereas LISP requires that you 
write things 'out of order'.

Compare out-of-the-box Python:
   a = 1 + 2 + 3 + 4

And out-of-the-box Lisp:
   (setq a (+ 1 2 3 4))

Which language has the lower barrier for entry? That should be a fairly 
important consideration for a language that is going to sit at the heart of an OS.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From janeaustine50 at hotmail.com  Tue Feb 22 21:46:02 2005
From: janeaustine50 at hotmail.com (Jane Austine)
Date: 22 Feb 2005 18:46:02 -0800
Subject: Style guide for subclassing built-in types?
Message-ID: <ba1e306f.0502221846.70cb4d5c@posting.google.com>

Please see the following code:
--------------------------------
class rev_wrap(object):
    def __init__(self,l):
        self.l=l
    def __getitem__(self,i):
        return self.l[-i-1]

class rev_subclass(list):
    def __getitem__(self,i):
        return list.__getitem__(self,-i-1)
        
if __name__=='__main__':
    l=rev_wrap([1,2,3])
    assert l[0]==3
    assert list(l)==[3,2,1]
    
    l=rev_subclass([1,2,3])
    assert l[0]==3
    assert list(l)==[3,2,1]
    
I know there is "reversed" and "reverse" but that's not the point. The
code fails at the last line.

Now that UserList is deprecated(not recommended) I suppose subclassing
built-in types are preferable than wrapping them. How do I properly
change the behaviours of built-in types? I think I have to override
__iter__ and next to pass the last line. Is it a good style? If so,
what is the most recommended way of implementing them?

Thank you in advance.

Jane


From wweston at att.net  Tue Feb  1 12:53:13 2005
From: wweston at att.net (wes weston)
Date: Tue, 01 Feb 2005 17:53:13 GMT
Subject: Where are list methods documented?
In-Reply-To: <41ffba7d$0$15879$a1866201@visi.com>
References: <41ffba7d$0$15879$a1866201@visi.com>
Message-ID: <dmPLd.2564$xR1.1285@bgtnsc04-news.ops.worldnet.att.net>

Grant Edwards wrote:
> I'm trying to figure out how to sort a list, and I've run into
> a problem that that I have tripped over constantly for years:
> where are the methods of basic types documented?  The only
> thing I can find on a list's sort() method is in the tutorial
> where it states:
> 
>    sort()
>        Sort the items of the list, in place. 
> 
> Doesn't the list method would accept a callable to be used as a
> comparison function?  Where is that sort of thing in the
> documentation?  I've looking in the library reference, the
> language reference, the global module index.
> 
> I have figured out I can do 
> 
> 
>>>>list.sort.__doc__
> 
> 'L.sort(cmpfunc=None) -- stable sort *IN PLACE*; cmpfunc(x, y) -> -1, 0, 1'
> 
Grant,
    For a quick, short doc string list: >>> help(list)
wes



From vincent at visualtrans.de  Fri Feb  4 01:11:09 2005
From: vincent at visualtrans.de (vincent wehren)
Date: Fri, 04 Feb 2005 07:11:09 +0100
Subject: Printing Filenames with non-Ascii-Characters
In-Reply-To: <36f9sqF505hq0U1@individual.net>
References: <36a3ikF4uk8r0U1@individual.net>
	<ctos5r$t3b$1@news2.tilbu1.nb.home.nl>
	<36bka5F4vp17cU1@individual.net>
	<ctrco7$uvs$1@news2.tilbu1.nb.home.nl>
	<36f9sqF505hq0U1@individual.net>
Message-ID: <ctv3lt$m71$1@news2.tilbu1.nb.home.nl>

Marian Aldenh?vel wrote:
> Hi,
> 
>  > Python's drive towards uncompromising explicitness pays off
> 
>> big time when you're dealing with multilingual data.
> 
> 
> Except for the very implicit choice of 'ascii' as an encoding when
> it cannot make a good guess of course :-).

Since 'ascii' is a legal subset Unicode and of most prevailing 
encodings, this is the only sensible thing to do. It is outside of the 
ascii range where characters become ambigious and need additional 
interpretation. Where other languages might ignore the problem at hand 
and send garbled data or replace characters to the output, Python at 
least let's you respond to conversion problems/errors.

> 
> All in all I agree, however.

That's good to hear ;)

--
Vincent Wehren



> 
> Ciao, MM


From simonwittber at gmail.com  Thu Feb 24 22:31:51 2005
From: simonwittber at gmail.com (Simon Wittber)
Date: Fri, 25 Feb 2005 11:31:51 +0800
Subject: Threading and consuming output from processes
In-Reply-To: <421E990D.9070608@geophile.com>
References: <1109278779.955986.193860@z14g2000cwz.googlegroups.com>
	<1109283053.971905.27670@z14g2000cwz.googlegroups.com>
	<1109295016.597170.21350@o13g2000cwo.googlegroups.com>
	<YBwTd.38471$H05.20645@twister.nyroc.rr.com>
	<421E990D.9070608@geophile.com>
Message-ID: <4e4a11f8050224193139ab959e@mail.gmail.com>

> 1) How should I solve this problem? I'm an experienced Java programmer
> but new to Python, so my solution looks very Java-like (hence the use of
> the threading module). Any advice on the right way to approach the
> problem in Python would be useful.

In the past, I have used the select module to manage asynchronous IO operations.

I pass the select.select function a list of file-like objects, and it
returns a list of file-like objects which are ready for reading and
writing.

http://python.org/doc/2.2/lib/module-select.html


From fanweixiao at gmail.com  Sat Feb  5 02:20:47 2005
From: fanweixiao at gmail.com (fanweixiao at gmail.com)
Date: 4 Feb 2005 23:20:47 -0800
Subject: who can tell me BASICS of Python
Message-ID: <1107588047.020906.321750@g14g2000cwa.googlegroups.com>

I want to know which compiler I can use ... thank you



From bdesth.quelquechose at free.quelquepart.fr  Mon Feb 14 20:38:43 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 15 Feb 2005 02:38:43 +0100
Subject: regular expression question
In-Reply-To: <mailman.2598.1108429453.22381.python-list@python.org>
References: <mailman.2598.1108429453.22381.python-list@python.org>
Message-ID: <42115020$0$15705$626a14ce@news.free.fr>

snacktime a ?crit :
> The primary question is how do I perform a match when the regular
> expression contains string variables?  For example, in the following
> code I want to match a line that starts with STX, then has any number
> of characters, then ends with STX.
> Example 2 I'm pretty sure works as I expect, but I'm not sure about
> Example 1, and I'm pretty sure about example 3.
> 
> import re
> from curses.ascii import STX,ETX,FS
> STX =  chr(STX)
> ETX =  chr(ETX)
> FS =  chr(FS)
> data = STX + "ONE" + FS + "TWO" + FS + "THREE" + ETX
> match = STX + '(.*)' + ETX
> 
> # Example 1
> # This appears to work, but I'm not sure if the '+' is being used in
> the regular expression, or if it's just joining STX, '(.*)', and ETX.
> 
> if re.search(STX + '(.*)' + ETX,data):
>   print "Matches"
> 
> # Example 2
> # This also appears to work
> if re.search(match,data):
>   print "Matches"
> 
> # Example 3
> # Doesn't work, as STX and ETX are evaluated as the literal strings
> 'STX' and 'ETX'
> if re.search('STX(.*)ETX', data):
>   print "Matches"

You may want something like:
if re.search('%s(.*)%s' % (STX, ETX), data):
   ...

BTW, given your requirements, I'd write this:
if re.search('^%s(.*)%s$' % (STX, ETX), data):
   ...



> Chris


From aurora00 at gmail.com  Mon Feb 21 00:31:41 2005
From: aurora00 at gmail.com (aurora)
Date: Sun, 20 Feb 2005 21:31:41 -0800
Subject: unicode encoding usablilty problem
References: <opsmekm2ei6yt6e7@news.cisco.com><mailman.2811.1108751132.22381.python-list@python.org>
	<opsmepfmcx6yt6e7@news.cisco.com>
	<mailman.2839.1108835032.22381.python-list@python.org>
Message-ID: <opsmi8a3z66yt6e7@news.cisco.com>

On Sat, 19 Feb 2005 18:44:27 +0100, Fredrik Lundh <fredrik at pythonware.com>  
wrote:

> "aurora" <aurora00 at gmail.com> wrote:
>
>> I don't want to mix them. But how could I find them? How do I know  
>> this  statement can be
>> potential problem
>>
>>   if a==b:
>>
>> where a and b can be instantiated individually far away from this line  
>> of  code that put them
>> together?
>
> if you don't know what a and b comes from, how can you be sure that
> your program works at all?  how can you be sure they're both strings?
>
> ("a op b" can fail in many ways, depending on what "a", "b", and "op"  
> are)
>

a and b are both string. The issue is 8-bit string or unicode string.


>> Things works fine, unit tests pass, all until the first non-ASCII  
>> characters
>> come in and then the program breaks.
>
> if you have unit tests, why don't they include Unicode tests?
>
> </F>

How do I structure the test cases to guarantee coverage? It is not  
practical to test every combinations of unicode/8-bit strings. Adding  
non-ascii characters to test data probably make problem pop up earlier.  
But it is arduous and it is hard to spot if you left out any.



From mfranklin1 at gatwick.westerngeco.slb.com  Thu Feb  3 06:37:30 2005
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Thu, 03 Feb 2005 11:37:30 +0000
Subject: convert ftp.retrbinary to file object? - Python language lacks
 expression?
In-Reply-To: <ctt1cj$q2n$1@sea.gmane.org>
References: <19804fd8.0502030208.10ace31e@posting.google.com>	<ctt0l1$o66$1@sea.gmane.org>
	<ctt1cj$q2n$1@sea.gmane.org>
Message-ID: <ctt2cm$s88$1@sea.gmane.org>

Martin Franklin wrote:
> Martin Franklin wrote:
> 
>> Robert wrote:
>>
>>> I just tried to convert a (hugh size) ftp.retrbinary run into a
>>> pseudo-file object with .read(bytes) method in order to not consume
>>> 500MB on a copy operation.
> 
> 
> [snip]
> 
>>
>>
>> Hmmmm this is nearly there I think...:
> 
> 
> whoops... spoke too soon..


Trigger happy this morning...

> 
>>
>> import ftplib
>>
>> class TransferAbort(Exception): pass
>>
>> class FTPFile:
>>     def __init__(self, server, filename):
>>         self.server = server
>>         self.filename = filename
>>         self.offset = 0
>>
>>     def callback(self, data):
>>         self.offset = self.offset + len(data)
>>         self.data = data
>>         ## now quit the RETR command?
>>         raise TransferAbort("stop right now")
>>
>>     def read(self, amount):
>>         self.ftp = ftplib.FTP(self.server)
>>         self.ftp.login()
> 
> 
> 
> I needed to insert a time.sleep(0.1) here as the connections were
> falling over themselves - I guess testing with a blocksize of 24
> is a little silly.
> 
> 
>>         try:
>>             self.ftp.retrbinary("RETR %s" %self.filename, self.callback,
>>                 blocksize=amount,
>>                 rest=self.offset)
>>         except TransferAbort:

also need to close the ftp connection here!

                self.ftp.close()

>>             return self.data
>>
>>
>> f = FTPFile("HOSTNAME", "FILENAME")
>>
>> print f.read(24)
>> print f.read(24)
>>
> 
> ## new test...
> 
> f = FTPFile("HOSTNAME", "FILENAME")
> 
> while 1:
>     data = f.read(24)
>     if not data:
>         break
>     print data,
> 
> 
>>
>> I open the ftp connection inside the read method as it caused an error 
>> (on the second call to read) when I opened it in  __init__ ???
>>
>> HTH
>> Martin
>>
>>



From ncoghlan at iinet.net.au  Thu Feb 17 09:52:54 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 18 Feb 2005 00:52:54 +1000
Subject: Why doesn't join() call str() on its arguments?
In-Reply-To: <4214A800.4010509@swiftdsl.com.au>
References: <37hippF4gcimiU1@individual.net>	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>	<37hqlrF59l2b2U1@individual.net>	<873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>	<421450CC.9080504@swiftdsl.com.au>	<87psyz8h9o.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<4214A800.4010509@swiftdsl.com.au>
Message-ID: <4214AFC6.6040804@iinet.net.au>

news.sydney.pipenetworks.com wrote:
> Nick Vargish wrote:
> 
>> "news.sydney.pipenetworks.com" <nytimes at swiftdsl.com.au> writes:
>>
>>
>>> Really ? Then why are you using python.
>>
>>
>>
>> Try "import this" at a Python prompt. I didn't invent "Explicit is
>> better than implicit."
>>
> 
> Thanks for the pointer. Let's see how many zen points are for the OP's 
> idea vs against
> 
> Against
> Explicit is better than implicit.
> Special cases aren't special enough to break the rules.
> 
> On the wall
> Errors should never pass silently.
> In the face of ambiguity, refuse the temptation to guess.
> There should be one-- and preferably only one --obvious way to do it.
> Although that way may not be obvious at first unless you're Dutch.
> Now is better than never.
> Although never is often better than *right* now.
> Namespaces are one honking great idea -- let's do more of those!
> 
> For
> Beautiful is better than ugly.
> Simple is better than complex.
> Complex is better than complicated.
> Flat is better than nested.
> Sparse is better than dense.
> Readability counts.
> Although practicality beats purity. Unless explicitly silenced.
> If the implementation is hard to explain, it's a bad idea.
> If the implementation is easy to explain, it may be a good idea.

 From the point of view of someone who actually *tried* doing this to the 
relevant method, while maintaining backward compatibility. . .

Against:

Explicit is better than implicit
Special cases aren't special enough to break the rules

In the face of ambiguity, refuse the temptation to guess
   - there are plenty of ambiguious cases to handle
Simple is better than complex (Semantics & C code)
   - and much complexity in dealing with the ambiguities
Errors should never pass silently. Unless explicitly silenced.
   - and a bunch of them are likely to indicate errors. Maybe.
Readability counts (C code)
   - This makes the implemenation hard to read
If the implementation is hard to explain, it's a bad idea.
   - or explain to anyone, too

For:

Beautiful is better than ugly.
   - the explicit calls to str() aren't that clean.

There should be one-- and preferably only one --obvious way to do it.
   - Currently listcomp, genexp, map, string interpolation, etc

IMO, the rest can be used to argue either side, or simply don't weigh heavily 
either way.

The things that make it a real cow are the current behaviour of auto-promotion 
to the Unicode version when there are any Unicode strings in the list, and the 
existence of __str__ and __repr__ methods which actually return instances of 
unicode rather than str.

Calling str() explicitly makes the different behaviours unsurprising. Trying to 
do the same thing behind the scenes has the potential to make the method behave 
*very* suprisingly depending on the objects involved.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From ncoghlan at iinet.net.au  Fri Feb 11 07:23:58 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 11 Feb 2005 22:23:58 +1000
Subject: namespaces module (a.k.a. bunch, struct, generic object, etc.)
 PEP
In-Reply-To: <4edc17eb.0502110255.1554217b@posting.google.com>
References: <GaudndOHLML3M5bfRVn-vg@comcast.com>	<pan.2005.02.10.15.10.26.594432@jerf.org>
	<4edc17eb.0502110255.1554217b@posting.google.com>
Message-ID: <420CA3DE.1080906@iinet.net.au>

Michele Simionato wrote:
> FWIW, you can count me about the people who (re)wrote this same thing
> (actually with some difference, since I wanted to keep the order, so
> I used nested lists instead of nested dictionaries, but the idea was
> similar). I would welcome some module in the standard library to store
> hierarchical data.

This is one of the reasons why Steven's idea of switching to proposing a new 
module is a good one. It then provides a natural location for any future 
extensions of the idea such as Records (i.e. namespaces with a defined set of 
legal fields) and NamedTuples and NamedLists (i.e. namespaces with a defined 
field order)

Cheers,
Nick

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From deetsNOSPAM at web.de  Fri Feb 11 13:55:55 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 11 Feb 2005 19:55:55 +0100
Subject: problem with tk and pass by refference (I think :)
References: <cuitgv$r4i$1@vegh.ks.cc.utah.edu>
Message-ID: <cuiv3n$681$04$1@news.t-online.com>

Hi,

button = Button(self.songWin, text=verse, command=(lambda num=verseNum:
self.showVerse(num)) )

should do the trick. The reason is basically that your version kept a
reference to verseNum - and when executed, the value verseNum points to is
the lasts one stored.

Rebinding the argument to a parameter in the lambda will keep the right
value for each iteration.


-- 
Regards,

Diez B. Roggisch


From cam.ac.uk at mh391.invalid  Sun Feb 20 10:28:11 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sun, 20 Feb 2005 15:28:11 +0000
Subject: introspection inquiry
In-Reply-To: <4218A579.2060503@jessikat.fsnet.co.uk>
References: <1108910710.985704.264430@c13g2000cwb.googlegroups.com>
	<4218A579.2060503@jessikat.fsnet.co.uk>
Message-ID: <cvaaae$77q$1@gemini.csx.cam.ac.uk>

Robin Becker wrote:
> self.__class__.__name__

Unless I misunderstood the question, that won't work. That will
give you the name of the class the object is an instance is of.
I think he wants the name of the class the method was defined in.

Here's a way to do that using metaclasses and Python's magic
double-underscore attribute-mangling feature:

"""
class SelfKnowledge(type):
     def __init__(cls, name, bases, dict):
         setattr(cls, "_%s__%s" % (name, "class_name"), name)
         type.__init__(cls, name, bases, dict)

class Nietzsche(object):
     __metaclass__ = SelfKnowledge

     def __init__(self, text):
         self.spam = text
         print "In the constructor of the %s class" % self.__class_name

class Kierkegaard(Nietzsche):
     def __init__(self, text):
         print "Now in the constructor of %s" % self.__class_name
         Nietzsche.__init__(self, text)

Nietzsche("Thus Spake Zarathustra")
print

Kierkegaard("Fear and Trembling")
"""

$ python test1.py
In the constructor of the Nietzsche class

Now in the constructor of Kierkegaard
In the constructor of the Nietzsche class
-- 
Michael Hoffman


From tdelaney at avaya.com  Mon Feb 14 17:55:49 2005
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Tue, 15 Feb 2005 09:55:49 +1100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE0252035F@au3010avexu1.global.avaya.com>

Stephen Kellett wrote:

> In message <cuq5du$k7g$1 at usenet.otenet.gr>, Ilias Lazaridis
> <ilias at lazaridis.com> writes
>>>  And yet there is not one company that has someone devoted full-time
>>> to  developing Python. Not even Guido.
>> 
>> Who's "Guido"?
> 
> LOL Falling off my chair!!!!!!

See, the problem is that you have to go all the way to the second FAQ in
order to find out who Guido is. Obviously it needs to be more prominent
on the Python web site.

Oh - you mean Ilias didn't actually *read* anything on the Python web
site? My bad.

Illias - I'm assuming you are not a troll (despite the contrary
evidence) and am going to direct you to a site with all the answers you
need.

http://www.catb.org/~esr/faqs/smart-questions.html

Tim Delaney


From snail at objmedia.demon.co.uk  Fri Feb 18 05:50:36 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Fri, 18 Feb 2005 10:50:36 +0000
Subject: [EVALUATION] - E02 - ULTIMATE RECIPE TO RESOLVE ALL ISSUES
References: <cuo71l$gig$1@usenet.otenet.gr> <cuv1st$6um$1@swifty.westend.com>
	<mailman.2714.1108579989.22381.python-list@python.org>
	<cv49qp$h7f$1@swifty.westend.com>
Message-ID: <Nlac06E8hcFCFw5r@objmedia.demon.co.uk>

In message <cv49qp$h7f$1 at swifty.westend.com>, Peter Maas 
<peter at somewhere.com> writes
>Perhaps we will soon see a triumphant publication with the title
>"Ilias Lazaridis - the ELIZA of the 21st century. A milestone towards
>the perfect Turing test" ;)

I've got to admit that for a large proportion of the time interacting 
(if that is the word) with him I thought I was the butt of a clever AI 
joke. I've finally come to the conclusion that there is a real, if 
seriously dysfunctional, person behind the communications.

If I knew more about the AI subject arena AND had more time on my hands 
I'd try to write an IlliasBot to see how far I got before I was found 
out. But I'm way too busy, so someone else will have to do it. I just 
hope they do it in Python or Ruby so that these languages get more 
publicity.

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From alanmk at hotmail.com  Wed Feb  9 11:19:23 2005
From: alanmk at hotmail.com (Alan Kennedy)
Date: Wed, 09 Feb 2005 16:19:23 +0000
Subject: multi threading in multi processor (computer)
In-Reply-To: <1107964587.818199.223980@g14g2000cwa.googlegroups.com>
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<420a2938$0$22987$626a14ce@news.free.fr>
	<1107964587.818199.223980@g14g2000cwa.googlegroups.com>
Message-ID: <lGqOd.47208$Z14.32559@news.indigo.ie>

[ajikoe at gmail.com]
> That's a pity, since when we have to run parallel, with single
> processor is really  not efficient. To use more computers I think is
> cheaper than to buy super computer in developt country.

Although cpython has a GIL that prevents multiple python threads *in the 
same python process* from running *inside the python interpreter* at the 
same time (I/O is not affected, for example), this can be gotten around 
by using multiple processes, each bound to a different CPU, and using 
some form of IPC (pyro, CORBA, bespoke, etc) to communicate between 
those processes.

This solution is not ideal, because it will probably involve 
restructuring your app. Also, all of the de/serialization involved in 
the IPC will slow things down, unless you're using POSH, a shared memory 
based system that requires System V IPC.

http://poshmodule.sf.net

Alternatively, you could simply use either jython or ironpython, both of 
which have no central interpreter lock (because they rely on JVM/CLR 
garbage collection), and thus will support transparent migration of 
threads to multiple processors in a multi-cpu system, if the underlying 
VM supports that.

http://www.jython.org
http://www.ironpython.com

And you shouldn't have to restructure your code, assuming that it is 
already thread-safe?

For interest, I thought I'd mention PyLinda, a distributed object system 
that takes a completely different, higher level, approach to object 
distribution: it creates "tuple space", where objects live. The objects 
can be located and sent messages. But (Py)Linda hides most of gory 
details of how objects actually get distributed, and the mechanics of 
actually connecting with those remote objects.

http://www-users.cs.york.ac.uk/~aw/pylinda/

HTH,

--
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan


From nheger at gmail.com  Wed Feb  2 00:46:07 2005
From: nheger at gmail.com (nik)
Date: 1 Feb 2005 21:46:07 -0800
Subject: Tkinter on dual screen
Message-ID: <1107323167.834041.199160@g14g2000cwa.googlegroups.com>

hello,

i am writing an app which is running on a dual screen setup on windows
and OS X. is anyone doing this using Tkinter? are there problems with
it?

i know Tk() takes a "screenname" argument which specifies the screen.
but i am not sure about how well Tkinter copes with having two Tk
objects and i could not find any documentation as to what the screens
are called.

- what are the screen names for screen 1 / 2 on windows / linux / OS X?
- is there a Tk command that can check for multiple screens? ideally i
would like something like
names = getScreenNames()
that tells me how many screens there are and what they are called. then
i could write my app so that it runs on any OS and with any number of
screens. all the examples i have seen so far rely on a
platform-specific name which seems to come out of nowhere...
- are you running dual screen Tkinter and is it working? what are the
pitfalls?

thanks for any help!

nik



From zsolt-googleP6463 at mailblocks.com  Thu Feb 17 19:22:24 2005
From: zsolt-googleP6463 at mailblocks.com (pythonUser_07)
Date: 17 Feb 2005 16:22:24 -0800
Subject: Whats up with re module vs pre
References: <1108675920.201110.81250@z14g2000cwz.googlegroups.com>
	<42152254$1@news.uni-ulm.de>
Message-ID: <1108686144.377520.320760@z14g2000cwz.googlegroups.com>

Like I said, I don't have a lot of specifics.  This is more of an over
time experience.

I do know that any problem I had with "re" was always resolved by
"pre".  Maybe they all had to do with recursion though.

Thanks for the heads up on python2.4.  Now all I have to do is get our
admins to install... sigh



From caleb1 at telkomsa.net  Wed Feb  2 23:43:06 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Wed, 02 Feb 2005 23:43:06 -0500
Subject: Two classes problem
References: <mailman.1768.1107369788.22381.python-list@python.org>
	<opsllpombg1js0xs@news.telkomsa.net>
	<g_CdnbihmfIxqpzfRVn-hw@comcast.com>
Message-ID: <opsllt14h21js0xs@news.telkomsa.net>

Steven, thanks for your help once again :)

> so you could write the code like:
>
> test = 'first'
> class aclass:
>      def __init__(self, value):
>          mod = __import__(__name__)
>          mod.test = value

This is sweet.  I really like this technique for manipulating module-scope  
identifiers (from within a class or function).

> To the OP:
>
> In general, this seems like a bad organization strategy for your code.  
> What is your actual use case?

Agreed.  It is an interesting intellectual exercise, but there is surely a  
better way of controlling access to 'test' in the OP's post.

thx
Caleb


From rt-announce-bounces at lists.bestpractical.com  Thu Feb 10 22:39:00 2005
From: rt-announce-bounces at lists.bestpractical.com (rt-announce-bounces at lists.bestpractical.com)
Date: Thu, 10 Feb 2005 22:39:00 -0500
Subject: Your message to RT-Announce awaits moderator approval
Message-ID: <mailman.771.1108093140.22590.rt-announce@lists.bestpractical.com>

Your mail to 'RT-Announce' with the subject

    Registration is accepted

Is being held until the list moderator can review it for approval.

The reason it is being held:

    Post by non-member to a members-only list

Either the message will get posted to the list, or you will receive
notification of the moderator's decision.  If you would like to cancel
this posting, please visit the following URL:

    http://lists.bestpractical.com/cgi-bin/mailman/confirm/rt-announce/4b3e38e1407d6a193d51cb77d901c50dfc3fcdfa



From steven.bethard at gmail.com  Sat Feb  5 18:47:23 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 05 Feb 2005 16:47:23 -0700
Subject: Computing class variable on demand?
In-Reply-To: <1107643020.261275.207690@z14g2000cwz.googlegroups.com>
References: <1107410898.260491.203090@l41g2000cwc.googlegroups.com>
	<6eydnSAjiuofW5zfRVn-sw@comcast.com>
	<1107445682.239962.284660@o13g2000cwo.googlegroups.com>
	<mY2dnU6Tjq1e-5_fRVn-hg@comcast.com>
	<1107501071.325170.168620@z14g2000cwz.googlegroups.com>
	<YfCdnf0-fb26NJ7fRVn-3g@comcast.com>
	<1107643020.261275.207690@z14g2000cwz.googlegroups.com>
Message-ID: <UZqdnQFkO7iaxpjfRVn-3w@comcast.com>

fortepianissimo wrote:
> Thanks Steve - actually my question was simpler than that. I just
> wanted to use Daniels' recipe of lazy initialization on objects with
> __slots__:
> 
> class Lazy(object):
>     def __init__(self, calculate_function):
>         self._calculate = calculate_function
> 
>     def __get__(self, obj, _=None):
>         if obj is None:
>             return self
>         value = self._calculate(obj)
>         setattr(obj, self._calculate.func_name, value)
>         return value
> 
> 
> class SomeClass(object):
> 
>     __slots__ = 'someprop'
> 
>     @Lazy
>     def someprop(self):
>         print 'Actually calculating value'
>         return 13
> 
> 
> o = SomeClass()
> print o.someprop
> print o.someprop
> 
> 
> 
> Running the code above will produce:
> 
> Actually calculating value
> Traceback (most recent call last):
>   File "Lazy.py", line 26, in ?
>     print o.someprop
>   File "Lazy.py", line 11, in __get__
>     setattr(obj, self._calculate.func_name, value)
> AttributeError: 'SomeClass' object attribute 'someprop' is read-only
> 
> 
> Removing the __slots__ statement, everything would run normally.
> 
> Is there any workaround?


Hmm...  Well, there's a thread on a similar topic:

http://mail.python.org/pipermail/python-dev/2003-May/035575.html

The summary is basically that '__slots__' creates descriptors for all 
the names in the __slots__ iterable.  If you define a function (or a 
Lazy object) at the class level with the same name as a slot, it 
replaces the descriptor for that slot name.  So then when setattr gets 
called, it can't find the descriptor anymore, so it can't write the value...

One workaround would be to have Lazy store the values instead of setting 
the attribute on the instance -- something like:

py> class Lazy(object):
...     def __init__(self, calculate_function):
...         self._calculate = calculate_function
...         self._values = {}
...     def __get__(self, obj, _=None):
...         if obj is None:
...             return self
...         obj_id = id(obj)
...         if obj_id not in self._values:
...             self._values[obj_id] = self._calculate(obj)
...         return self._values[obj_id]
...
py>
py> class SomeClass(object):
...     __slots__ = []
...     @Lazy
...     def someprop(self):
...         print 'Actually calculating value'
...         return 13
...
py> o = SomeClass()
py> o.someprop
Actually calculating value
13
py> o.someprop
13

Basically Lazy just stores a mapping from object ids to calculated 
values.  Not as pretty as the original solution, but if you have to have 
__slots__ defined[1], I guess this might work.

Note that I don't need to declare any slots since the someprop 
descriptor is a class-level attribute, not an instance-level one...

Steve

[1] Are you sure you have to use __slots__?  Unless you're creating a 
very large number of these objects, you probably won't notice the 
difference in memory consumption...


From jeff at ccvcorp.com  Wed Feb 16 14:23:33 2005
From: jeff at ccvcorp.com (Jeff Shannon)
Date: Wed, 16 Feb 2005 11:23:33 -0800
Subject: Imported or executed?
In-Reply-To: <slrnd17668.3nr.schulz@sunbroy2.informatik.tu-muenchen.de>
References: <slrnd17668.3nr.schulz@sunbroy2.informatik.tu-muenchen.de>
Message-ID: <11177besc8c7bf1@corp.supernews.com>

Stephan Schulz wrote:

> Is there a (portable, standard) way for the program/module to find out
> if it is imported or executed stand-alone?

def fixbb(*filelist):
     # ...

if __name__ == '__main__':
     # Executed stand-alone
     fixbb(sys.argv[1:])

(Obviously, you'd probably want to do more command-line checking than 
this...)

Jeff Shannon
Technician/Programmer
Credit International



From mjs7231 at gmail.com  Wed Feb 16 11:23:29 2005
From: mjs7231 at gmail.com (mjs7231)
Date: 16 Feb 2005 08:23:29 -0800
Subject: Getting milliseconds in Python
In-Reply-To: <37h5epF5ck38lU2@individual.net>
References: <1108565135.167562.196830@z14g2000cwz.googlegroups.com>
	<37h5epF5ck38lU2@individual.net>
Message-ID: <1108571009.698970.152020@z14g2000cwz.googlegroups.com>

"Return the time as a floating point number expressed in seconds since
the epoch, in UTC. Note that even though the time is always returned as
a floating point number, not all systems provide time with a better
precision than 1 second. While this function normally returns
non-decreasing values, it can return a lower value than a previous call
if the system clock has been set back between the two calls. "

This is no good, I am looking for milliseconds, not seconds.. as stated
above.



From gmane-schpam at joefrancia.com  Tue Feb 15 12:22:24 2005
From: gmane-schpam at joefrancia.com (Joe Francia)
Date: Tue, 15 Feb 2005 12:22:24 -0500
Subject: [perl-python] problem: reducing comparison
In-Reply-To: <1108450348.253772.158120@z14g2000cwz.googlegroups.com>
References: <1108450348.253772.158120@z14g2000cwz.googlegroups.com>
Message-ID: <cutavo$m5n$1@sea.gmane.org>

Xah Lee wrote:
> here's a interesting real-world algoritm to have fun with.

 From you?  Doubtful.

Sorry, dude, but you've been replaced by ?ber-troll Ilias Lazaridis. 
Security will escort you to the door.


-- 
Soraia: http://www.soraia.com



From invalidemail at aerojockey.com  Sat Feb 19 05:21:42 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 19 Feb 2005 02:21:42 -0800
Subject: lambda closure question
In-Reply-To: <mailman.2826.1108806125.22381.python-list@python.org>
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
Message-ID: <1108808502.699333.66520@g14g2000cwa.googlegroups.com>


jfj wrote:
> Carl Banks wrote:
> > Ted Lilley wrote:
> >
> >
> >>Unfortunately, it doesn't work.  It seems the closure keeps track
of
> >>the variable fed to it dynamically - if the variable changes after
> >  [...]
> >>
> >>At least, that's the explanation I'm deducing from this behavior.
> >
> >
> > And that's the correct explanation, chief.
>
> >
> > It is intended that way.  As an example of why that is: consider a
> > nested function called "printvars()" that you could insert in
various
> > places within a function to print out the value of some local
variable.
> >  If you did that, you wouldn't want printvars to print the values
at
> > the time it was bound, would you?
>
> Allow me to disagree (and start a new "confused with closures"
thread:)
>
> We know that python does not have references to variables. To some
> newcomers this may seem annoying but eventually they understand the
> pythonic way and they do without them. But in the case of closures
> python supports references!

That's right.  It's called Practicality beats purity.

The question is what's more important: to be able to use a nested
function to reference the outer scope, or to be able to use a nested
function as a closure inside the function it was defined in?  (Both
approaches effectively allow using a nested function as a closure if
it's used after the function returns.)

The Gods decided, for practical reasons, the former was more important.
 My experience bears this out: I find that about half the nested
functions I use are to reference an outer scope, half I return as a
closure.  Only once or twice did I try to use a nested function inside
the defining function.  I would guess this is more or less typical of
how nested functions are used.  If so, it was the right decision.


-- 
CARL BANKS



From fredrik at pythonware.com  Thu Feb 10 11:46:06 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 10 Feb 2005 17:46:06 +0100
Subject: sre is broken in SuSE 9.2
References: <mailman.2299.1108029731.22381.python-list@python.org><cufu9t$j37$1@news.sap-ag.de>
	<20050210184503.5ffd2aa8.ods@strana.ru>
Message-ID: <cug30s$smu$1@sea.gmane.org>

Denis S. Otkidach wrote:

>> > On all platfroms \w matches all unicode letters when used with flag
>> > re.UNICODE, but this doesn't work on SuSE 9.2:
>>
>> I think Python on SuSE 9.2 uses UCS4 for unicode strings (as does
>> RedHat), check sys.maxunicode.
>>
>> This is not an explanation, but perhaps a hint where to look.
>
> Yes, it uses UCS4.  But debian build with UCS4 works fine, so this is
> not a problem.  Can --with-wctype-functions configure option be the
> source of problem?

yes.

that option disables Python's own Unicode database, and relies on the C library's
wctype.h (iswalpha, etc) to behave properly for Unicode characters.  this isn't true
for all environments.

is this an official SuSE release?  do they often release stuff that hasn't been tested
at all?

</F> 





From daniel at bowettsolutions.com  Wed Feb 16 06:04:22 2005
From: daniel at bowettsolutions.com (Daniel Bowett)
Date: Wed, 16 Feb 2005 11:04:22 +0000
Subject: MYSQL - how to install ?
In-Reply-To: <1108547199.260223.211450@f14g2000cwb.googlegroups.com>
References: <1108547199.260223.211450@f14g2000cwb.googlegroups.com>
Message-ID: <cuv9jj$j6m$1@sea.gmane.org>

Download MySQL for windows at:
http://www.mysql.com

Then:
http://www.google.co.uk/search?hl=en&q=python+mysql&btnG=Google+Search&meta=

Lad wrote:
> I use XP windows and Python 2.3. How can I install MYSQL on my
> computer? I could not find any installer for MYSQL and Python 2.3
> Thanks for help
> Lad.
> 



From bpeng at rice.edu  Sat Feb  5 11:01:57 2005
From: bpeng at rice.edu (Bo Peng)
Date: Sat, 05 Feb 2005 10:01:57 -0600
Subject: changing local namespace of a function
In-Reply-To: <mailman.1962.1107593815.22381.python-list@python.org>
References: <cu0lru$8ik$1@joe.rice.edu>	<cu0sj5$sfk$1@sea.gmane.org>	<4204400C.5060608@iinet.net.au>	<mailman.1948.1107575575.22381.python-list@python.org>	<cu1l9o$3oq$1@joe.rice.edu>
	<mailman.1962.1107593815.22381.python-list@python.org>
Message-ID: <cu2qlm$34d$1@joe.rice.edu>

Nick Coghlan wrote:

> 
> If you want to add more calculated properties to the data manipulator, 
> simply define additional calculator methods, and define the attribute 
> with make_prop.

This has became really appealing....

You know, I have a deep root in C/C++ so performance is the king and 
hacking is part of my daily life. Time to change now. :)

My original problem was that I need to manipulate and create dictionary 
items in situ and since there are so many "d['key']"s, I would like to 
make my code easier to read (and save some key strokes) by using "d.key" 
or simply "key", without sacrificing performance. OOP seemed to be 
irrelevant.

But this on-demand calculation (quote: make first call to z automatic) 
is *really* good! I can calculate self._data.stat_a = self._data.stat_b 
+ 1 without worrying about the status of stat_b and users can access any 
   value in the dictionary, original or calculated, in a uniform and 
easier way! This makes my program instantly easier to use.

I can not say enough thank you for this.

Bo


From leszczynscy at nospamyahoo.com  Wed Feb 23 20:04:47 2005
From: leszczynscy at nospamyahoo.com (Andy Leszczynski)
Date: Wed, 23 Feb 2005 19:04:47 -0600
Subject: rounding problem
Message-ID: <gu6dnWNLB-FHuoDfRVn-tA@comcast.com>

It is on Windows, Linux, Python 2.3:

[GCC 3.3.2 (Mandrake Linux 10.0 3.3.2-6mdk)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> a=1.1
 >>> a
1.1000000000000001
 >>>


Is it normal?

Andy


From deetsNOSPAM at web.de  Fri Feb 18 15:56:50 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 18 Feb 2005 21:56:50 +0100
Subject: help for xml parsing error
References: <mailman.2817.1108758149.22381.python-list@python.org>
Message-ID: <cv5kqg$rcr$00$2@news.t-online.com>

Michael Zhang wrote:

> I got a strange error of my python program.  The
> program is trying to load some data from server (also
> built in Python).  the data is in xml format.  After

You claim it is in xml format - but the parser error strongly suggest that
it isn't. Please do show it to us, then we can comment on it.

-- 
Regards,

Diez B. Roggisch


From peter at engcorp.com  Sun Feb 13 20:56:30 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sun, 13 Feb 2005 20:56:30 -0500
Subject: For American numbers
In-Reply-To: <420fb4e6$0$16575$9b622d9e@news.freenet.de>
References: <420e7376$1@nntp0.pdx.net> <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
	<420fb4e6$0$16575$9b622d9e@news.freenet.de>
Message-ID: <ZcKdnWy9_fFamI3fRVn-iA@powergate.ca>

Martin v. L?wis wrote:
> Peter Hansen wrote:
> 
>> For the rest of the computer world, unless I've missed
>> a changing of the guard or something, "kilo" is 1024
>> and "mega" is 1024*1024 and so forth...
> 
> 
> In case this isn't clear yet: you have missed a changing
> of the guard or something. "kibi" is 1024, "mebi" is
> 1024*1024 and so forth. "kilo" is 1000.

Yeah, saw the link.  The IEC doesn't speak for me, I'm afraid.
And as the wikipedia notes, "As of 2005 this naming convention
has not gained widespread use."

I suspect I and many others will go to our graves not being
comfortable mebbling and gibbling over our bytes, though
we'll probably spend a lot of time kibbling over the issue...

-Peter


From adonisv at DELETETHISTEXTearthlink.net  Fri Feb 18 23:50:27 2005
From: adonisv at DELETETHISTEXTearthlink.net (Adonis)
Date: Sat, 19 Feb 2005 04:50:27 GMT
Subject: xmlrpc.server.work() does not seem to handle multiple requests
In-Reply-To: <018be98bd7f75da932445488d3263748@localhost.talkaboutprogramming.com>
References: <018be98bd7f75da932445488d3263748@localhost.talkaboutprogramming.com>
Message-ID: <nAzRd.788$Ba3.282@newsread2.news.atl.earthlink.net>

john14 wrote:
> Hi,
> 
> I have an xmlrpc server. I using the python package
> xmlrpc. Here is what I am doing:
> 
>     s = xmlrpc.server()
>     s.addMethods(method_hash)
>     s.bindAndListen(PORT)
>     while 1:
>         try:
>             s.work()
>         except:
>             e = sys.exc_info()
> 
> The problem is that when I send multiple requests they are queued and
> processed one after the other. Is there some other method that will allow
> me to process multiple request at the same time?
> 
> Thank You
> 

Check out this snippet look at the end for user comments to get a 
multi-threaded or forking version.

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/81549

Hope this helps.

Adonis


From fredrik at pythonware.com  Mon Feb  7 11:42:51 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 7 Feb 2005 17:42:51 +0100
Subject: declarations summary
References: <1107750862.485179.61980@c13g2000cwb.googlegroups.com>
	<1grm033.wnee8f9w790oN%aleaxit@yahoo.com>
Message-ID: <cu85ne$cd7$1@sea.gmane.org>

Alex Martelli wrote:

> Used to be that C compilers didn't do register allocation with any skill
> nor finesse, but did let you give a hint by using "register" as the
> storage class of a variable.  Smart programmers studied the generated
> machine code on a few architectures of interest, placed "register"
> appropriately, studied what changes this made to the generated code, and
> didn't forget to check on all different machines of interest.
>
> Most C programmers just slapped "register" where they GUESSED it would
> help, and in far too many cases they were horribly wrong, because
> intuition is no good guide to performance improvement; I have witnessed
> examples of code where on certain machine/compiler combinations
> inserting a "#define register auto" to disable the GD ``register'' made
> some functions measurably FASTER.
>
> Then "graph-coloring" register allocators came into their own and in the
> space of a few years ``register'' blissfully became just about
> irrelevant; nowadays, I believe all extant compilers simply ignore it,
> at least in suitable optimization mode.

[fredrik at brain Python-2.3.3]$ grep register */*.c | wc -l
    502
[fredrik at brain Python-2.4]$ grep register */*.c | wc -l
    497

oh, well.  at least we're moving in the right direction.

</F> 





From stefan.behnel-n05pAM at web.de  Wed Feb  2 10:04:36 2005
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 02 Feb 2005 16:04:36 +0100
Subject: Is this a contradiction in the docs ?
In-Reply-To: <1107353647.999603.252240@z14g2000cwz.googlegroups.com>
References: <1107342032.273119.194120@o13g2000cwo.googlegroups.com>
	<0i4Md.102585$Jk5.77392@lakeread01>
	<1107353647.999603.252240@z14g2000cwz.googlegroups.com>
Message-ID: <ctqq5r$t3v$1@lnx107.hrz.tu-darmstadt.de>


Fuzzyman schrieb:
> Hmmm... my code will *never* need to run on anything other than CPython
> because I use py2exe to turn it into a frozen python distribution. So
> if it was always safe in CPython then that would be fine for me.

No one will ever need more than 640K of RAM and BTW, my program will be 
replaced well before the year 10000, so four digits for the year should be 
enough...

Stefan


From justin.standard at gmail.com  Mon Feb  7 18:09:54 2005
From: justin.standard at gmail.com (Justin Standard)
Date: Mon, 7 Feb 2005 15:09:54 -0800
Subject: Modifying the global modules included with the distribution
Message-ID: <b1793a6b05020715092318244@mail.gmail.com>

Hi,

I'm trying to make some small modifications to the xml.dom.minidom
module.  I'm developing on windows (since I have to at work), and I
located the .py files which represent the module in the Python23/Lib
directory, I made my changes to the file:
Python/Lib/xml/dom/minidom.py.  However, when I run the interpreter,
my changes aren't reflected.

Do I need to rebuild python to make these changes take?  Or is there
some other process to modify global modules.  I realize that I _could_
have extended it, but this _seemed_ easier, and the work is already
done.

Thanks!

Justin Standard
-- 
----- BEGIN GEEK CODE BLOCK -----
Version 3.12
GCS/H/O d-(--) s+:- a-- C++(+++)$ ULS(++++)>$ P+>+++ L+++ E-> W++ N@
o? K? w--- !O M V- PS++(+++) PE Y?>++ PGP++ t+@ !5 X+ R<+ tv-- b++>+++
DI+ UF++ D+ G++(-) e++>++++ h--- r++++ y+++
----- END GEEK CODE BLOCK -----


From davidf at sjsoft.com  Fri Feb  4 06:59:24 2005
From: davidf at sjsoft.com (David Fraser)
Date: Fri, 04 Feb 2005 13:59:24 +0200
Subject: Weekly Python Patch/Bug Summary
In-Reply-To: <mailman.1866.1107492129.22381.python-list@python.org>
References: <mailman.1866.1107492129.22381.python-list@python.org>
Message-ID: <ctvo2s$lio$1@ctb-nnrp2.saix.net>

Kurt B. Kaiser wrote:
> Patch / Bug Summary
> ___________________
> 
> Patches :  284 open ( +4) /  2748 closed ( +1) /  3032 total ( +5)
> Bugs    :  804 open ( +1) /  4812 closed (+13) /  5616 total (+14)
> RFE     :  167 open ( +0) /   142 closed ( +1) /   309 total ( +1)

I wonder if it would be possible to include the status of the closed 
bugs ... if a patch has been refused thats very different to it being 
included. I usually end up opening the page to see what has happened, 
would be nice if it was in the mail...

David


From ilias at lazaridis.com  Mon Feb 14 05:25:01 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Mon, 14 Feb 2005 12:25:01 +0200
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <1108374274.207311.155780@l41g2000cwc.googlegroups.com>
References: <cuo71l$gig$1@usenet.otenet.gr><cup249$svu$1@gemini.csx.cam.ac.uk>
	<cupqb6$1oi$1@usenet.otenet.gr>
	<1108374274.207311.155780@l41g2000cwc.googlegroups.com>
Message-ID: <cupu9r$isb$1@usenet.otenet.gr>

Fuzzyman wrote:
> Ilias Lazaridis wrote:
> [snip..]
> 
>>>>b) Why does the Python Foundation not ensure, that the python
>>>>source-code is directly compilable with MinGW?
>>>
>>>Why should they? It already runs on Windows with a freely available
>>>compiler.
>>
>>Obvious: Courtesy [against the userbase needs]
>>
>>Obvious: Consistency [same code-base across different compiler]
> 
> Are you aware that the MSVC compiler they use produces tighter code
> than gcc ? [1] *Most* users would rather have a faster python than a
> python built with an open source compiler.
> Particularly as distutils (read Python) can *easily* be configured to
> use mingw to build extensions from source - which seems to be your real
> requirement.

This is not relevant.

The Python Foundation should just ensure, that the source-code-base is 
compilable with MinGW on windows, too.

This is a very natural requirement.

There is really no need to 'fight' against this.

There is just a need to cooperate to achieve this.

[...]
> [1] Not knocking gcc - it's just optimsied for portability rather than
> speed. If you want to see *a* benchmark, there is a link to one in my
> 'upgrading python' article. (In the article section at
> http://www.voidspace.org.uk/python/index.shmtl )

.

-- 
http://lazaridis.com


From aleaxit at yahoo.com  Tue Feb  1 05:29:15 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Tue, 1 Feb 2005 11:29:15 +0100
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<1107188359.375703.110590@f14g2000cwb.googlegroups.com>
	<1gr9lyc.1rrm543162uefN%aleaxit@yahoo.com>
	<1107229287.315380.222790@c13g2000cwb.googlegroups.com>
Message-ID: <1grapnx.1n37awikzig4sN%aleaxit@yahoo.com>

Michael Tobis <mt at 3planes.com> wrote:

> Alex Martelli wrote:
> > Michael Tobis <mt at 3planes.com> wrote:
> 
> > he can perfectly
> > well correct his misexpression if he cares to -- not my job to try to
> > read his mind and perform exegesis on his words.
> 
> Well, I hate to try to tell you your job, but it doesn't seem to be to
> be all that great of a marketing strategy to actively chase people
> away... Hey, he might have been a Nutshell customer.

I'd far rather sell one fewer copy of the Nutshell, than sell one more
to somebody who is not _happy_ to use Python.


> > I think it would have been true, but weak and insufficient.  Not only
> > experienced Python users have that opinion: lack of declarations
> didn't
> > faze me even I was a total newbie
> 
> It did me, and it did many others. Perhaps you are unrepresentative.

Maybe; I did have good knowledge of a variety of languages, for example.
However, I have seen many people come upon ideas that were new to them
and meet them with interest and curiosity, even if initially doubtful
about the novelty, rather than with fear and loathing.  I think that
such an attitude is a better predictor of how happy a person will be
with Python (or other technologies he's initially unfamiliar with) than
"previously accumulated knowledge".


> It's one thing to say "no can do, sorry", it's another to say "you
> don't need this anyway and if you think you do you aren't worthy".

To say one is sorry about something that, in fact, makes one deliriously
happy, would be the worst sort of hypocrisy, even though it's a socially
common ``white lie''.  As for "worthy", that's a completely different
viewpoint, and I would appreciate it if you didn't put words into my
mouth.

Believing that somebody might be unhappy using Python (or any other
given technology), at least at this point in their personal development,
due to their ingrained mindset and strongly held opinions against one of
the cornerstones of the language, has nothing to do with "worth".


> In fact, it was your book I spent the most time thumbing through
> looking for the "use strict" equivalent that I was absolutely certain
> must exist. Hell, even Fortran eventually gave in to "IMPLICIT NONE".

...which has nothing to do with the case, since in Fortran, and from day
one, all names had statically determinable types anyway.

> It's practically the only thing I've ever expected to find in Python
> that hasn't vastly exceeded my expectations, aand I'm sure Alexander is
> not the only person to be put off by it.

By Hugol's Law, surely not.  So what?  If he sticks to his misguided
expectations, he won't be happy with Python.  If he outgrows them, he
probably will.  But the best way forwards is to get used to unit-testing
and thereby realize declarations are deadweight, THEN use a language
where they just aren't there.

> In fact, I'd recommend a
> paragraph early in the Nutshell book saying "there are no declarations,

What about a paragraph asking the reader to *READ* the book before
offering advice about it?  On p.32, "Python has no declarations"; on
p.39, under Variables, right at the start of the paragraph, "In Python,
there are no declarations.  The existence of a variable depends on a
statement that <i>binds</i> the variable, or, in other words, that sets
a name to hold a reference to some object".

Not only are these words pretty early, right towards the start of the
chapter giving an overview on the language, but I think the second
snippet has quite a prominent position.  If you're looking for a way to
declare variables, and don't think of looking at the very start of the
section titled "Variables" -- or if the words you find there,
reinforcing the previous assertion to the same effect, still keep you
"thumbing through" the book in search of what I just said isn't there, I
disclaim responsibility.

A book, particularly a quick reference, needs to be considered as a
_cooperative_ effort between writer and reader.  I can fairly be tasked
with expressing every important thing about the language, and I think I
do -- not all of the "sea lawyer"-level quibbles, but all of the aspects
most readers truly need.  But I cannot fairly be asked to *belabor*
every aspect that might faze some reader or other, to ward against the
reader not being careful and not realizing that, in a work where
conciseness is of the essence, every single word is there for a purpose.

If you need repetition and belaboring, get a book that's intended as
slow-paced tutorial.  Demanding tutorial-like repetitiousness of a
*quick reference* is absurd and irresponsible.

> no use strict, no implicit none, sorry, forget it", and an index

This is the second time you ask or suggest that I take an apologetic
attitude (or at least mouth platitudes that sound apologetic without
_meaning_ to be apologetic in the least), and I repeat: forget it.

> listing under "declarations" pointing to a detailed exegesis of their
> nonexistence. It would have saved me some time.

...and would have cost time to careful readers, ones who know that "no
declarations" means (surprise!) *NO* declarations, and are sensible
enough to NOT expect "detailed exegesis" in a *quick reference* work.

No way -- and I'm not apologetic in the least about it, please note.

Having a tightly limited space budget, I carefully allocate it to
materials that I think it will do most good to most readers in the main
target audience: Python programmers.  "I'm not trying to teach Python
here", as I say right at the start of that chapter (it's chapter 4, and
I believe it's just the sample chapter O'Reilly chose to place on their
site, so readers of this thread who don't own the book should be able to
have a look and follow this debate more closely) -- it's certainly
_possible_ to learn Python from the book, but only by reading very
closely and carefully, because the book eschews the repetition and
belaboring that a tutorial work would abound in (unless it be very, very
fast paced for a tutorial, which is also a possible stance; I believe
it's the stance taken by the excellent "Dive Into Python").

To you, it's the lack of declarations (because you can't or won't take
assertions about "no declarations" at face value); to another, it's
significant indentation, issues of typing, limits on recursion, argument
passing, the lack of a switch/case statement, -2**2... I mention each
and every one of these issues, of course, but it would be totally
inappropriate to offer for each the "detailed exegesis" you require.


> It's true that in some sense an assignment is all the declaration you
> need. I think Carl Banks's point (what we think of as assignment as a
> carryover from other languages is really rebinding, and in many cases
> can be avoided) is also helpful.

It's known as an "assignment statement" in Python, too, and its
semantics may be ones of binding or rebinding.  "Assignment statements
are the most common way to bind variables and other references", and the
whole following paragraph about rebinding, Nutshell p. 39.

> But that doesn't make the "epselon" bug go away, and wanting to have a
> way to catch it quickly isn't, to my mind, obviously a criminal act.

Of course not, and test-driven design is the right way to catch quickly
that bug, and many others (including but not limited to ones caused by
other typos).

> Also, based on what DogWalker demonstrates, it's really not that alien
> to Python and should be feasible.

I assume you're referring to the abuse of __slots__ that's so
ridiculously popular?  As I explain on p. 86, __slots__ is meant
strictly to let you save memory.  It does NOT work well to catch typos
in real-life code (as opposed to toy-level examples).  Michele Simionato
has a reasonable recipe on ActiveState's Cookbook (that recipe's also
going to be in the Cookbook's 2nd edition, due out in a couple months)
to show how to use __setattr__ instead (much more sensible) if you're so
tremendously "typo-phobic".

But, like the "leading __" idea, weird metaclasses and decorators that
let you omit the explicit 'self', and quite a few others, these nifty
tricks ARE in fact fully alien to Python "as she's spoken" -- they're
quoted, repeated, and varied upon, with ridiculous frequency, totally
out of proportion to their miniscule importance in the normal and
idiomatic practice of the language, because more and more people come to
Python, from a wide variety of other languages, keen to not change their
habits and "keep coding X in Python" for any value of X you might care
to name.

Pythonistas like showing off Python's power, in particular by mimicking
the different ways in which different languages work, and we may well
think that trying to soothe the worries of people coming to Python with
all the wrong expectations and thereby make Python more converts -- I
know I've been guilty of this particular error in the past.  But I do
think it's an error when it gets overdone the way it's being overdone
these days; that to be really happy with Python, one should use Python
to do *PYTHON* programming, NOT to halfway-mimic Java, Visual Basic,
Fortran, PHP, Eiffel, Scheme, Dylan, Javascript, Ada, and Haskell, all
rolled into one.

As Steve Holden just posted, this may well mean that Python is not in
fact suitable for EVERYbody -- only people who are willing to give a try
to Python AS SUCH, rather than feeling a deep-seated need to mimic other
languages they're used to (perhaps due to unwillingness to use important
and excellent methodologies and tools, from unit-tests onwards).  If so,
then, so be it: yeah, even if it means I sell fewer copies of my books,
let those fewer copies be sold to people who'll APPRECIATE AND ENJOY
both the books and the language, rather than pine for ``variable
declarations'', thumb endlessly looking for detailed exegeses of what
ISN'T there, and so on.  I think the total amount of happiness in the
world will be enhanced thereby, and, in the end, that's what matters.


> > > Also, the assertion that "Python has no declarations whatsoever" is
> no
> > > longer obviously true. In the 2.4 decorator syntax, a decorator
> line is
> > > not executable, but rather a modifier to a subsequent symbol
> binding. I
> > > call it a declaration.
> >
> > You may call it a strawberry, if you wish, but that doesn't mean it
> will
> > taste good with fresh cream.  It's nothing more and nothing less than
> an
> > arguably weird syntax for a perfectly executable statement:
> 
> This may well be true in implementation, but cognitively it is a
> declaration that modifies the reference and not the referent. I see
> that it is a big deal to ask for more of these, but I don't see why.

Because the "cognition" is simply and totally wrong and
counterproductive: if you have the wrong mental model of what "splat
foo" means, you won't be productive in coding and using various new
possibilities for ``foo'' within that syntax.

It's not a matter of implementation, but of SEMANTICS -- what the syntax
form actually DOES, quite independent of HOW it does it, is to call a
HOF once the following def statement is done executing, to ``filter''
the function object to be bound to the name.  No more, no less, and
NOTHING to do with ``declarations'', any more than statements such as
def and class are declarations (thinking of them as such is a serious
conceptual error and gravely hampers programming productivity).

I think your total and utter misconception of decorator syntax as being
a "declaration" is the best possible argument against that syntax; I
also think the syntax was probably worth having anyway, despite that.
After all, somebody sufficiently crazed from a withdrawal crisis from
declarations, as you appear to be, may go around calling "declarations"
anything whatsoever, be it splats, def, class, import, assignments, and
so on -- we can't rip all statements out from Python to make it into a
safe padded cell for declaration-junkies where they won't hurt
themselves and others.

I hope one day to forward this exchange to Guido as part of a dossier
against the latest (and neat!) syntax tweak he's considering for Python
3.0 -- having something like:

def f(x: <expression>):
   <body>

be a syntactic shortcut for

def f(x):
    x = <something>(x, <expression>)
    <body>

where the `<something>' might be the ``adapt'' builtin (per PEP 246) or
some variation thereon.  The argument boils down to: many people will
mis-conceptualize this nifty shortcut as a DECLARATION and thereby get
hopelessly confused and utterly misuse it, completely failing to
understand or accept that it's just a syntax shortcut to promote an
important idiom, just like the splat-syntax for decorators.

He'll probably go ahead anyway, of course, just as he did for decorators
despite the huge flamewars -- if he wasn't such a stubborn guy, Python
would be unlikely to be so unique;-).


> > > Let me add that I remain unconvinced that a language cannot combine
> the
> > > best features of Python with very high performance, which is
> ultimately
> >
> > I'm also unconvinced.  Fortunately, so is the EU, so they have
> approved
> > very substantial financing for the pypy project, which aims in good
> part
> > exactly at probing this issue.
> 
> I hope this works out, but it's hard for me to see how pypy will avoid
> lots of hashing through dictionaries. I'm willing to help it by
> declaring an immutable reference. Here, don't look this up; it always
> points to that.

If such crutches are necessary, I guess that will emerge.  The best
compilers for other dynamic languages, such as the stalin compiler for
scheme, can do without such crutches -- I'm sure it's hard for you to
see how, but if you study modern advanced compiler theory (which IS
hard, of course) then you might perhaps stand a chance.

> I'm guessing that this will also be considered a bad idea, and maybe
> someday I'll understand why. I'm looking for insight, not controversy.

I'm not sure there's much insight to be had: you want some forms of
redundancy, which you can get in other languages; we'd rather avoid such
localized redundancy, as the "end-to-end" checks that testing gives us
makes it so much deadweight -- and we NEED testing anyway, even with the
little redundancy aspects, because no such redundancy will catch many
errors, including typos such as a + where a - was meant, a < where a <=
was meant, and so on.

Introducing such redundancy as "optional" soon makes it practically
mandatory for most people in most situations, for many reasons, such as,
because people who manage programming efforts often like restricting
their employees under the misapprehension that this somehow makes things
better -- the history of all languages which introduced ``optional''
redundancy makes this abundantly clear.  So, in practice, defending
redundancy as ``it's just optional'' is nothing but a figleaf: if it
gets its ugly foot in the door, it WILL be around most people's necks
most of the time foreverafter.

Python is one of the few widespread languages where one is blissfully
free of practically-mandated redundancy, and can thus practice the
healthy programming principle of "Once, and only once" -- not having to
repeat things twice like some magical formula in a ritual.  This lack of
redundancy is a good part of Python's power, in the judgment of many of
us who deliberately chose Python rather than other languages which allow
(and indeed practically mandate) the redundancy.

I, and many others, chose Python over other languages, because (duh!) we
saw Python's differences wrt the others as its _strengths_ -- and ever
since we have had to fight off the well-meaning attempts of ceaseless
waves of newcomers, who are utterly keen to spoil Python by making it
more similar to those other languages we rejected in its favor, i.e.,
sap Python's strengths.  Many old-timers already believe that changes to
Python in recent years have not been an overall good thing -- I
disagree, as I believe the changes so far have mostly strengthened
Python's support for its own design principles and goals, but I
understand their viewpoint.

If you're looking for insight on end-to-end checks as being preferable
to localized ones, the best paper I know is one on networking theory,
<http://mit.edu/Saltzer/www/publications/endtoend/endtoend.pdf> -- for
test-driven design, Beck's book, the already-referenced Robert Martin
blog entry <http://www.artima.com/weblogs/viewpost.jsp?thread=4639>, and
innumerable other entries about "unit testing", "agile programming",
"test driven design", and suchlike, which you can google for.


> I am trying to talk about having expressive power in constraining
> references as well as the referents. Python studiously avoids this, but
> decorators change that.

No it doesn't!  A decorator puts absolutely NO constraint on any
reference whatsoever -- you're perfectly free to rebind every reference
at will, as usual.

A *descriptor*, or any of several other OO mechanisms, may put whatever
constraints you like on ``compound'' references -- attributes and items.
Most simply, you can define __setitem__, etc, in a class, and then
assignments to an indexing on instances of that class will go through
such special methods which may do, *AT RUNTIME*, whatever checks you
like; and similarly for __setattr__ -- and if you can use metaclasses to
put such constraints on classes just like classes put them on instances.

A descriptor lets you ``constrain'' one specific attribute of instances
by having all bindings of that attribute go through the descriptor's
__set__ method (if it defines one, of course -- that's currently known
as a ``data descriptor'' though the terminology is shifting).  Again,
that's entirely a runtime issue -- no ``declaration'' whatsoever.


> I am not deep enough into the mojo as yet to
> have more than a glimmer of an idea about the distinction you are
> making. It's not the one I'm trying to make.

The distinction that seems relevant to me: a *declaration* is about
something you tell the _compiler_, something which has intrinsically
static effects, _preliminary_ to runtime; a *statement* has effects at
runtime _if and when it executes_.

In Python, "global" is a declaration -- a wart -- because it has exactly
these ``preliminary'' effects, independent of runtime and execution.

But, for example, ``class'' definitely isn't: it builds and binds a
separate class object each time it executes, IF it executes.  E.g.:

classes = []
for i in range(3):
    class Foo(object): pass
    classes.append(Foo)

classes[2].zippo = 23
classes[0].zippo = 17
print classes[2].zippo

See?  No declarations whatsoever -- just a few perfectly ordinary
statements, which do perfectly ordinary runtime operations, such as
making objects, binding names, calling methods, ...

If the first statement in the loop body was changed to:

    Foo = type('Foo', (), {})

we'd have exact semantic equivalence.  It's NOT a matter of "mere
implementation": this is how the class statement is DEFINED to work;
it's SEMANTICS.

> decorators may not be implemented as declarations, but they cognitively
> act as declarations, and that's what I care about here.

Once again, with feeling: implementation doesn't really matter.  Their
SEMANTICS are defined in those terms -- perfectly ordinary runtime
executable statements.  In *NO* *WAY* *WHATSOEVER* do the "act as
declarations", and if your cognition tells you differently, then it's
your cognition that is faulty in this case -- you're badly misreading
the whole situation.

In particular, decorators don't put any "constraints on references",
which you seem to somehow mysteriously equate to ``declarations''.  Of
course, you may use a decorator to install a _descriptor_ object (which
may put constraints on compound-references, as above mentioned), just as
you might use an assignment for the same kind of "installing".  But that
doesn't make
   @foo(23)
   def bar( ... :
      ...
any more of ``cognitively a declaration'' than the exact semantic
equivalent:
   def bar( ... :
      ...
   bar = foo(23)(bar)

If this occurs outside a class, there's no connection to compound
references, thus certainly no constraint; if inside a class, and foo(23)
is a callable which returns a data-descriptor object when called with
function object bar as its argument, then this may imply constraints on
access to x.bar where x is an instance of said class.


> > I have nothing against a declarative style _per se_ -- it just
> doesn't
> > fit Python's "everything happens at runtime" overall worldview, and
> that
> > simple and powerful worldview is a good part of what makes Python
> tick
> > SO well.
> 
> I'm glad you have said something something I absolutely agree with. I'm
> alarmed at the suggestions here that class and def blocks are
> declarative. The fact that they're executable is really a core part of
> the beauty of Python.

And the fact that *decorators* are executable is exactly equivalent.


> However, I don't see how an 'import strict' would necessarily violate
> this, nor an "import immutableref", which is something I would find
> useful in trying to wrestle with NumArray, and which a high-performance
> Python could (I think) use to advantage.
> 
> Now I may be wrong; in fact I'd bet against me and in favor of you and
> Frederik if I had to bet. It's just that I don't see why I'm wrong.

What would the effects of such an ``import strict'' be?  Stop any
binding or rebinding of barenames except by some arcane incantations?
Then, by inevitably becoming a "theoretically optional, practically
mandatory" part of Python use, anytime a typical pointy-haired boss has
anything to do with it, it would sabotage programmers' productivity, by
forcing them to use just such redundant incantations and thereby violate
"once and only once".  Otherwise, I don't see how it would avert the
``epselon'' terror you keep waving at us.

If ``import immutableref'' is meant to make Python into a
single-assignment language (specifically and only for the module into
which it gets imported), it probably would not run as high a risk of
becoming mandatory -- single-assignment languages, and other functional
programming languages based on concepts of data being immutable, have
been around for ages but PHBs are terrified by them anyway (reasonably:
it takes a highly mathematical mind to be effective at functional
programming).  I do not understand how this would help you with
numarray, in the least, so perhaps you could help with some examples of
how you would like such a declaration to work.  Presumably the language
thus constrained would not have for loops (which do need to rebind the
control variable over and over), and while loops would also be pretty
iffy, so recursion abilities would have to be strengthened considerably,
for starters.  More generally, I have my doubts that Python can be
usefully constrained to single-assignment semantics without needing some
compensating additions elsewhere.  But maybe single-assignment is not
what you mean by your extremely elliptic mention, so I'll wait for your
examples of how that would help you with numarray in particular.


Alex


From ncoghlan at iinet.net.au  Sat Feb  5 10:20:11 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 06 Feb 2005 01:20:11 +1000
Subject: changing local namespace of a function
In-Reply-To: <1griamw.a425vd8qqrklN%aleaxit@yahoo.com>
References: <cu0lru$8ik$1@joe.rice.edu>
	<cu0sj5$sfk$1@sea.gmane.org>	<4204400C.5060608@iinet.net.au>	<mailman.1948.1107575575.22381.python-list@python.org>	<cu1l9o$3oq$1@joe.rice.edu>
	<1griamw.a425vd8qqrklN%aleaxit@yahoo.com>
Message-ID: <4204E42B.7040105@iinet.net.au>

Alex Martelli wrote:
> Bo Peng <bpeng at rice.edu> wrote:
>    ...
> 
>>Thank again for everyone's help. I have learned a lot from the posts,
>>especially the wrapdict class.
> 
> 
> Hmmm, you do realize that wrapdict uses a lot of indirection while my
> equivalent approach, just posted, is very direct, right?  To reiterate
> the latter, and dress it up nicely too, it's
> 
> class wrapwell(object):
>     def __init__(self, somedict):
>         self.__dict__ = somedict
> 
> and use d=wrapwell(whateverdict) to make the wrapper.  Now, reading or
> writing d.x is just like reading or writing whateverdict['x'], etc etc.

I was wondering if that would work, but never got around to trying it. It can be 
used with the property-based auto calculation approach, too (the calculated 
properties just store the results in self.__dict__ instead of self._data):

class DataManipulator(object):
   def __init__(self, data):
     self.__dict__ = data

   class _utils(object):
     @staticmethod
     def make_prop(name, calculator):
       def get(self, _name=name, _calculator=calculator):
         try:
           return self.__dict__[_name]
         except KeyError:
           val = _calculator(self)
           self.__dict__[_name] = val
           return val
       def set(self, val, _name=name):
         self.__dict__[_name] = val
       def delete(self, _name=name):
         del self.__dict__[_name]
       return property(get, set, delete)

     @staticmethod
     def calc_z(self):
       return self.x + self.y

   z = _utils.make_prop('z', _utils.calc_z)

Py> d = DataManipulator(dict(x=1, y=2))
Py> d.x
1
Py> d.y
2
Py> d.z
3
Py> d.x = 10
Py> d.z
3
Py> del d.z
Py> d.z
12

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From EP at zomething.com  Sat Feb  5 00:07:07 2005
From: EP at zomething.com (EP)
Date: Fri, 4 Feb 2005 21:07:07 -0800
Subject: OT: why are LAMP sites slow?
In-Reply-To: <280bd2-1ad.ln1@eskimo.tundraware.com>
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<mailman.1857.1107479377.22381.python-list@python.org>
	<7xis59qgaz.fsf@ruckus.brouhaha.com>
	<280bd2-1ad.ln1@eskimo.tundraware.com>
Message-ID: <20050204210707.444118616.EP@zomething.com>

Tim Daneliuk <tundra at tundraware.com> commented:

> This has a lot to do with the latency and speed of the connecting
> network. Sites like Ebay, Google, and Amazon are connected
> to internet backbone nodes (for speed) and are cached throughout
> the network using things like Akami (to reduce latency)...


I agree, the problem is not always the software.  :-)  I think Akami reduces the network latency experienced; also, one may have multiple servers and load balance the traffic, and local NetCaches can speed traffic by reducing the load on the server (the most requested data is cached upstream from the server).  

I understand that web queries are very clustered (though I've not seen data to confirm this): we may all be making individual queries (googling about decorators?), but the queries are not as different as we might imagine.  Hardware caching helps with that.

A good "enterprise" web site will have infrastructure on it's side beyond what an economical-minded non-commercial site is likely to invest in.

Transactional (secure) processing is a different animal, I think (but I would also think it is a very small percent of the overall web traffic).


No worries, Apache may run faster when it's written in PyPy.  :-)  I guess that statement shows I am a bit biased in thought process.








From mwm at mired.org  Tue Feb 15 15:43:36 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 15 Feb 2005 14:43:36 -0600
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr> <37bkemF5a7s7vU1@individual.net>
	<cut6nh$rpk$1@usenet.otenet.gr> <86ll9piuj8.fsf@guru.mired.org>
	<cutf1h$576$1@usenet.otenet.gr>
Message-ID: <86hdkdimfb.fsf@guru.mired.org>

Ilias Lazaridis <ilias at lazaridis.com> writes:

> Mike Meyer wrote:
>>>It is an community need.
>> Based on the evidence at hand, this is a false statement.
> It is an community need [at least partially]

Repeating a falsehood will not make it true.

Can you offer anything besides your own whining to back this claim up?

    <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From Scott.Daniels at Acm.Org  Thu Feb 24 14:15:07 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Thu, 24 Feb 2005 11:15:07 -0800
Subject: Interesting decorator use.
Message-ID: <421e2398@nntp0.pdx.net>


I have started doing the following to watch for exceptions in wxPython.
I'd like any input about (A) the interface, and (B) the frame before I
throw it in the recipes book.

     import wx, os, sys
     errorframe = None

     def watcherrors(function):
         '''function decorator to display Exception information.'''
         def substitute(*args, **kwargs):
             try:
                 return function(*args, **kwargs)
             except Exception:
                 error_type, error, traceback = sys.exc_info()
                 mb = wx.MessageDialog(errorframe,
                             '%s\n\nClick OK to see traceback' % error,
                             'Error in Run',
                             wx.OK | wx.CANCEL | wx.ICON_ERROR)
                 if wx.ID_OK == mb.ShowModal():
                     mb.Destroy()
                     from traceback import extract_tb
                     trace = ['%s line %s in %s:\n\t%s' % (
                              (os.path.splitext(os.path.split(
                                  name)[1])[0], line, fun, text)
                              for name, line, fun, text in
                                  extract_tb(traceback)]
                     mb = wx.MessageDialog(errorframe,
                             '\n'.join(['%s\n' % error] + trace),
                             'Run Error w/ Traceback',
                             wx.OK | wx.ICON_ERROR)
                     result = mb.ShowModal()
                 mb.Destroy()
                 raise
         if function.__doc__ is not None:
             substitute.__doc__ = function.__doc__
         return substitute

You can use it as follows to wrap functions and methods:

     @watcherrors
     def something(somearg)
         if somearg is not None:
                 raise ValueError(somearg)


You can use this by simply placing '@watcherrors' on the line before a
function or method definition.  Some of my questions are:
    A) Is there a better name? Perhaps "exceptions" or "watcher"?
    B) Is a global the right way to define the parent of the driven
       message box, or adding another wrapper layer as follows better?

       def exceptionwatcher(base, name):
           def watcherrors(....
               ...
               def substitute(*args, **kwargs):
                 try:
                     return function(*args, **kwargs)
                 except Exception:
                     error_type, error, traceback = sys.exc_info()
                     errorframe = getattr(base, name, None) ### new code
                     ...
           return watcherrors

       Wrapping the code this way allows you to say, watcher-by-watcher,
       where to get the parent for the message box.  You would then use
       it as follows:

         @exceptionwatcher(someholder, 'frame')
         def something(somearg)
             if somearg is not None:
                     raise ValueError(somearg)

     C) Stuff I've not even thought of.

--Scott David Daniels
Scott.Daniels at Acm.Org


From grante at visi.com  Fri Feb 18 10:25:11 2005
From: grante at visi.com (Grant Edwards)
Date: 18 Feb 2005 15:25:11 GMT
Subject: Platform independent adduser script?
References: <1108739886.550370.231620@g14g2000cwa.googlegroups.com>
Message-ID: <421608d7$0$44633$a1866201@visi.com>

On 2005-02-18, morphex <morphex at gmail.com> wrote:
> Hi there,
>
> does anyone here know of a script that enables adding of users on UNIX
> platforms via python?

os.system("adduser ... ") ?

The way that users are added on "UNIX platforms" varies.  Most
(Linux, BSD, Solaris) seem to have an "adduser" command.  I
don't know how consistent the format of the adduser arguements
are.

-- 
Grant Edwards                   grante             Yow!  Didn't I buy a 1951
                                  at               Packard from you last March
                               visi.com            in Cairo?


From M.Waack at gmx.de  Tue Feb 15 12:05:41 2005
From: M.Waack at gmx.de (Mathias Waack)
Date: Tue, 15 Feb 2005 18:05:41 +0100
Subject: StringIO objects sharing a buffer
References: <pan.2005.02.15.08.43.57.932014@ID-174572.user.uni-berlin.de>
Message-ID: <5om9e2-id7.ln1@valpo.de>

Thomas Lotze wrote:

> Is there a way for multiple StringIO objects to share a buffer of
> data, or do I have to give up on subclassing StringIO for this
> purpose? (An alternative would be a tokenizer class that has a
> StringIO instead of being one and do the file pointer housekeeping
> in there.)

I'm not sure if I understand the problem right, but there is a rule
of thumb: 
Prefer delegation to inheritance. If you can use delegation, avoid
inheritance. Esp. on python, where (from the point of view of usage)
there is no distinction between delegation or inheritance. 

Mathias


From snail at objmedia.demon.co.uk  Tue Feb 15 18:47:28 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Tue, 15 Feb 2005 23:47:28 +0000
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr> <cupstp$an7$2@ctb-nnrp2.saix.net>
	<cupupa$kfs$2@usenet.otenet.gr> <cupvhi$c15$1@news1.ucsd.edu>
	<cuq084$r99$1@usenet.otenet.gr> <cuq2h0$j2s$1@eeyore.INS.cwru.edu>
	<cuq57b$j83$1@usenet.otenet.gr> <37bkemF5a7s7vU1@individual.net>
	<cut6nh$rpk$1@usenet.otenet.gr> <86ll9piuj8.fsf@guru.mired.org>
	<cutf1h$576$1@usenet.otenet.gr>
	<mailman.2644.1108496325.22381.python-list@python.org>
	<cutk8f$qu2$1@usenet.otenet.gr>
Message-ID: <YSApZIJQooECFwQk@objmedia.demon.co.uk>

In message <cutk8f$qu2$1 at usenet.otenet.gr>, Ilias Lazaridis 
<ilias at lazaridis.com> writes
>The community is everyone around python (including me at this moment).

Based on the communities response to you (and the similar response you 
are getting in c.l.ruby) you are not a member of either community as you 
continue to deliberately ignore the accepted norms of interaction with 
the community. I'll list them here for you (again).

1) Do some research yourself (i.e try to answer your own questions)
2) When you have problems tell the group what you did, what the results 
were and what the problem was.
3) If the community thinks you have done 1 and 2 you will most likely 
get a helpful response. Some people will be generous and help you 
anyway.
After a while people will realise you have no interest in doing any work 
yourself and give you a hard time (the c.l.ruby group appear to have hit 
this threshold today) until you mend your ways. Do 1 and 2 and you'll 
get your questions answered much faster than your current approach.

The most amazing thing is the number of times you've been told this by 
so many different people and so many different newsgroups and yet you 
*still don't get it*.

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From http  Mon Feb 14 12:45:52 2005
From: http (Paul Rubin)
Date: 14 Feb 2005 09:45:52 -0800
Subject: Scan document pages to a compressed PDF
References: <p_WdnW4O8bHNfI3fRVn-ow@centurytel.net>
Message-ID: <7xvf8vox0v.fsf@ruckus.brouhaha.com>

Ed Suominen <ed-no at spam-eepatents.com> writes:
> What's the best way currently to do CCITT4 compression (e.g., of
> intermediate TIFF-format images) from Python? PIL doesn't seem to support
> CCITT4 compression, and the read-only patch [1] that's available won't help
> in my case. I'd like to incorporate as much as possible into the Python
> code and imported packages, rather than relying on pipes to a bunch of
> external programs.


I ended up doing about the same thing as you, generating shell scripts
to run existing command line stuff.

This might also be of some interest:  http://tumble.brouhaha.com/


From caleb1 at telkomsa.net  Thu Feb 10 00:18:21 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Thu, 10 Feb 2005 00:18:21 -0500
Subject: Newbie:  SWIG or SIP?
References: <cKKdnfEhSpyv65ffRVn-qg@comcast.com>
Message-ID: <opslyucvyu1js0xs@news.telkomsa.net>

Brent

Google "python ctypes".  ctypes is cool :)

keep well
Caleb



On Wed, 9 Feb 2005 13:44:44 -0700, Brent W. Hughes  
<brent.hughes at comcast.net> wrote:

> I have a third-party DLL and it's associated .h file.  The DLL was  
> written
> in C.  I have neither the associated .c files nor the .obj files for the
> DLL.  Can I use SWIG or SIP to build something that will allow me to use  
> the
> DLL with Python?  And what is that something, an .obj file, another DLL  
> or
> what?
>
> Brent
>
>



From noreply at python.org  Mon Feb  7 00:38:51 2005
From: noreply at python.org (The Post Office)
Date: Mon, 7 Feb 2005 10:38:51 +0500
Subject: Returned mail: see transcript for details
Message-ID: <20050207055140.036611E4007@bag.python.org>

The original message was received at Mon, 7 Feb 2005 10:38:51 +0500
from 196.191.122.168

----- The following addresses had permanent fatal errors -----
python-list at python.org




From fakeadmin at gmail.com  Thu Feb 10 21:10:41 2005
From: fakeadmin at gmail.com (rhat)
Date: 10 Feb 2005 18:10:41 -0800
Subject: Unit Testing in Python
Message-ID: <1108087841.271630.228970@o13g2000cwo.googlegroups.com>

Hi Everyone,
I've recently been reading some articles about unit-testing in Python
[1] [2], but I am a bit confused: where do I go to get started with
this? I tried googling for "unittest" but all I've found are some old
links to projects that already use it, and the older (as the articles
put it) PyUnit project. I'm sorry if this is a obvious question or one
that has already been answered, but unit-testing sounds interesting and
I'm not sure where to start.

Thanks,
Ryan Kaulakis



From steven.bethard at gmail.com  Fri Feb 18 15:13:21 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 18 Feb 2005 13:13:21 -0700
Subject: selecting dictionaries to maximize counts
Message-ID: <oPGdnQfZXPnD0YvfRVn-oQ@comcast.com>

I have a list of dictionaries.  Each dictionary holds counts of various 
'words', e.g.:

py> countdicts = [
...     dict(a=9, b=9, c=9),
...     dict(a=8, b=7),
...     dict(a=4, b=5, c=12)]

I need to select dicts with the constraint that the number of each 
'word' totalled over all selected dicts doesn't exceed a given 
MAX_VALUE.  Right now, I do this by:

py> def select(dicts, n):
...     result = []
...     counts = {}
...     def doadd(d):
...         for label, count in d.iteritems():
...             if counts.get(label, 0) + count > n:
...                 return False
...         return True
...     for d in dicts:
...         if doadd(d):
...             result.append(d)
...             for label, count in d.iteritems():
...                 counts[label] = counts.get(label, 0) + count
...     return result
...

Basically, I use a greedy approach -- adding a dict each time if I can. 
  This leads to some suboptimal solutions given that, while the total 
counts must not exceed MAX_VALUE, I'd like them to be as close to 
MAX_VALUE as possible.  An example of data on which my select function 
produces such a suboptimal solution:

py> countdicts = [
...     dict(a=9, b=9, c=9),
...     dict(a=8, b=7),
...     dict(a=4, b=5, c=12)]
py> select(countdicts, 12)
[{'a': 9, 'c': 9, 'b': 9}]

The better solution would have been to select the second two dicts -- 
then all 'words' would have count 12.

I don't need an optimal solution; in fact, the solution I have right now 
is tolerable.  But if anyone knows a simple way to improve my 
performance, I'd appreciate it.  Thanks!

STeVe

P.S.  No, I'm not just making these problems up!  I'm sick, but not that 
sick. ;)  It has to do with resampling a set of data...  If you're 
really interested, I can provide the full details, but they'll only make 
the problem even _more_ complicated. =)


From fuzzyman at gmail.com  Fri Feb 18 05:55:07 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 18 Feb 2005 02:55:07 -0800
Subject: Help needed for to build a CGI shell interface.
In-Reply-To: <n2ta11pp03gp23vjpn7981g9fv4i3jmfan@4ax.com>
References: <mailman.2755.1108644567.22381.python-list@python.org>
	<37jjk4F5eefr4U1@individual.net>
	<4214d128$0$145$fb624d75@newsspool.solnet.ch>
	<n2ta11pp03gp23vjpn7981g9fv4i3jmfan@4ax.com>
Message-ID: <1108724107.257530.149330@c13g2000cwb.googlegroups.com>


Tim Roberts wrote:
> Slalomsk8er <news at slalomsk8er.ch> wrote:
> >
> >What do I want to do? I am building an admintool (deamon and client)
and
> >for this I need to script a interface to the shell, with the console

> >ansi escape sequences, whitch is fully transparent for the user.
>
> Do you honestly plan to expose a command shell via CGI?  Can you
think of a
> better way to allow hackers to wreak havoc on your system?

CGI is not a very good way of doing this - although I did implement a
*very* basic version that is on the Python Cookbook. The python
interpreter closes after executing a CGI... You could setup a long
running process on teh server that communicates with the CGI every time
it opens. I don't use Lunix systems myself... so I don't know how to
tell the client shell to communicate via the CGI

Regards,


Fuzzy

> --
> - Tim Roberts, timr at probo.com
>   Providenza & Boekelheide, Inc.



From steve at holdenweb.com  Wed Feb  2 16:06:55 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 02 Feb 2005 16:06:55 -0500
Subject: Generating modul classes with eval
In-Reply-To: <mailman.1772.1107377411.22381.python-list@python.org>
References: <mailman.1772.1107377411.22381.python-list@python.org>
Message-ID: <XmbMd.102634$Jk5.56554@lakeread01>

Axel Straschil wrote:

> Hello!
> 
> I was fooling around with creating classes for a module with eval,
> something like:
> 
> MyModule.py:
> 
> class Base:
> 	init(self, name):
> 		self._name = name
> 
> for myclass in ['A', 'B', 'C']:
> 	code="class %s(Base):\n\tinit(self, name='%s')\n\t\tsuper(%s,
> 	self).__init(name=name)\n"%dict(myclass, myclass.lower(), myclass())
> 	... codeop and eval stuff ...
> a=A()
> print a
> 
> that gives: <class '__main__.A'>, but I want MyModule.A ;-)
> 
> Can someone give me a hint how to create classes in a module with eval
> and codeop so that they exist like the code was written in?
> 
> Thanks, 
> AXEL.
> 
You could try just importing the module - then, when it runs, its name 
won't be "__main__" but "MyModule".

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005          http://www.python.org/pycon/2005/
Steve Holden                           http://www.holdenweb.com/


From alanmk at hotmail.com  Sun Feb 13 13:18:09 2005
From: alanmk at hotmail.com (Alan Kennedy)
Date: Sun, 13 Feb 2005 18:18:09 +0000
Subject: Second posting - Howto connect to MsSQL
In-Reply-To: <1108317720.675414.87990@f14g2000cwb.googlegroups.com>
References: <iyMPd.4612$ZZ.1645@newssvr23.news.prodigy.net>
	<1108317720.675414.87990@f14g2000cwb.googlegroups.com>
Message-ID: <qNMPd.47439$Z14.33292@news.indigo.ie>

[John Fabiani]
 > Since this is (sort of) my second request it must not be an easy
 > solution. Are there others using Python to connect MsSQL?

[jdonnell]
> http://sourceforge.net/projects/mysql-python

Note that "MsSQL" != "MySQL".

-- 
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan


From JoshuaACohen at gmail.com  Wed Feb  9 14:22:11 2005
From: JoshuaACohen at gmail.com (Josh)
Date: 9 Feb 2005 11:22:11 -0800
Subject: Reportlab and Barcodes
In-Reply-To: <1107965379.046718.248000@c13g2000cwb.googlegroups.com>
References: <1107894763.331701.26470@c13g2000cwb.googlegroups.com>
	<mailman.2252.1107964089.22381.python-list@python.org>
	<1107965379.046718.248000@c13g2000cwb.googlegroups.com>
Message-ID: <1107976931.161073.258600@f14g2000cwb.googlegroups.com>

One of the users on the Reportlabs mailing list was kinda enough to
offer me the solution.. A simple call to the drawOn function, e.g.:

bc = code39.Standard39("123",xdim = .015*inch)
x = 6*inch
y = -5*inch
bc.drawOn(canvas,x,y)



From fredrik at pythonware.com  Fri Feb 11 13:20:03 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 11 Feb 2005 19:20:03 +0100
Subject: That horrible regexp idiom
References: <3e8ca5c805020923107c36cd7f@mail.gmail.com>
Message-ID: <cuissf$67u$1@sea.gmane.org>

Stephen Thorne wrote:

> but it occured to me today, that it is possible to do it in python
> without the extra line.
> '
> '>>> def xsearch(pattern, subject):
> '>>>     yield pattern.search(subject)
>
> '>>> for m in xsearch(foo_pattern, subject):
> '>>>     pass
> '>>> else:
> '>>>     pass
>
> simple, concise, requires no new syntax, and is only a little confusing[1]!

don't forget "untested, and doesn't work unless you add more logic".  here's
a "working" version.

    def xsearch(pattern, subject):
        yield pattern.search(subject)

    for m in xsearch(foo_pattern, subject):
        if m:
            print "match", m
            break
    else:
        print "no match"

which is a rather odd way to write an assignment followed by an if-else.  but
alright, maybe it's an improvement if your "=" key is broken...

(you were joking, right?)

</F> 





From wade_stoddard at yahoo.com  Mon Feb 21 23:08:49 2005
From: wade_stoddard at yahoo.com (Igorati)
Date: Mon, 21 Feb 2005 23:08:49 -0500
Subject: NOOB coding help....
Message-ID: <69012ed09e48920e1e80e311bca1659c@localhost.talkaboutprogramming.com>

Ok, this is what I have so far:

#This program will ask for a user to imput numbers. The numbers will then
be calculated
#to find the statistical mean, mode, and median. Finallly the user will be
asked
#if he would like to print out the answers.
list = [ ] 
a = 1 
print 'Enter numbers to add to the list. (Enter 0 to quit.)'
while a != 0 :
    a = input('Number? ')
    list.append(a)
zero = list.index(0)
del list[zero]
list.sort() 

variableMean = lambda x:sum(x)/len(x)
variableMedian =  lambda x: x.sort() or x[len(x)//2]
variableMode = lambda x: max([(x.count(y),y) for y in x])[1]
s = variableMean(list)
y = variableMedian(list)
t = variableMode (list)

x = (s,y,t)
inp = open ("Wade_StoddardSLP3-2.py", "r")
outp = open ("avg.py", "w")
f = ("avg.py")
for x in inp:
    outp.write(x)
import pickle
pickle.dump(x, f)


print 'Thank you! Would you like to see the results after calculating'
print 'The mode, median, and mean? (Please enter Yes or No)'
raw_input('Please enter Yes or No:')
if raw_input == Yes:

    f = open("avg.py","r")
    avg.py = f.read()
    print 'The Mean average is:', mean
    print 'The Median is:', meadian
    print 'The Mode is:', mode

I am attempting to make it so that I can save the mean, meadian, and mode
and then if the user wants the data to give it to him. Thank you for any
assistance you can provide!

Wade



From skip at pobox.com  Thu Feb  3 17:26:36 2005
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 3 Feb 2005 16:26:36 -0600
Subject: bytecode obfuscation
In-Reply-To: <1f060c4c05020313268582f6d@mail.gmail.com>
References: <1f060c4c05020313268582f6d@mail.gmail.com>
Message-ID: <16898.42268.704918.728013@montanaro.dyndns.org>


    snacktime> How difficult is it to turn python bytecode into it's
    snacktime> original source?

Not very.  Google for "python decompyle".

Skip


From tbunce at mac.com  Tue Feb  1 15:18:15 2005
From: tbunce at mac.com (Thomas Bunce)
Date: Tue, 01 Feb 2005 12:18:15 -0800
Subject: How do you do arrays
References: <tbunce-0102051052450001@192.168.1.12>
	<1107284817.848551.79000@c13g2000cwb.googlegroups.com>
Message-ID: <tbunce-0102051218150001@192.168.1.12>

Tryed it and this is what I got (I did go to the web sight)

tom(h=500)$ /tmp/501/Cleanup\ At\ Startup/ptesting-128981347.87.py.command; exit
Input the maximu number of tvalue: 114
Traceback (most recent call last):
  File "/Users/tom/Desktop/ptesting.py", line 20, in ?
    iMatrix[index] = k
IndexError: list assignment index out of range
logout
[Process completed]

The complete listing:

#!/usr/bin/python
import random
import sys
import array
#
### generates a list of numbers between 1 and target
### and uses 23 % of these values.
#

iMatrix = []

tvalue = input('Input the maximu number of tvalue: ')
majorlop1 = int tvalue * .23)
listvalues = range(tvalue)

sep = '- '
index = 0
while index < majorlop1:
   index = index + 1
   k = random.choice(listvalues) + 1
   iMatrix[index] = k
   
while index < majorlop1:
   print '- %s %s' % (iMatrix[index], sep)
#
###
#
I would like to set the size of the List/array independent 
of having to intialialize it prior to use. 
If it help I will say the bad works I am using OSX

   Thanks Tom
In article <1107284817.848551.79000 at c13g2000cwb.googlegroups.com>,
"Kartic" <kartic.krishnamurthy at gmail.com> wrote:

> Tom,
> 
> Before you use iMatrix[index], you have to tell python to use iMatrix
> as an array. You will do that using iMatrix = [] *outside* the loop.
> 
> iMatrix = []
> while index < majorlop1: # rest of the loop statements
> 
> Since you are new, please take a look at the Python tutorial to get you
> started.
> http://docs.python.org/tut/tut.html
> 
> Thanks,
> -Kartic


From Franck.Pommereau at noos.fr  Mon Feb 21 05:06:03 2005
From: Franck.Pommereau at noos.fr (Franck Pommereau)
Date: Mon, 21 Feb 2005 11:06:03 +0100
Subject: [PyGTK] Resizing a HandleBox
Message-ID: <4219b242$0$8861$79c14f64@nan-newsreader-07.noos.net>

Hi all,

I'm using PyGTK-2.0.0, when I detach a HandleBox, the resizing of the 
newly created window is broken: it can be resized but it's content (the 
HandleBox and its child) is not affected at all and is not resized.

Does any one have a solytion to this problem?

Thanks in advance!
Franck


From steven.bethard at gmail.com  Wed Feb 23 11:24:53 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 23 Feb 2005 09:24:53 -0700
Subject: unicode(obj, errors='foo') raises TypeError - bug?
In-Reply-To: <421c786a$1_1@newspeer2.tds.net>
References: <mailman.2958.1109141791.22381.python-list@python.org>
	<ydWdndBX1-sXrYHfRVn-vQ@comcast.com>
	<421c786a$1_1@newspeer2.tds.net>
Message-ID: <_vOdnZ_efPnIM4HfRVn-qQ@comcast.com>

Kent Johnson wrote:
> Steven Bethard wrote:
> 
>> No, this is documented behavior[1]:
>>
>> """
>> unicode([object[, encoding [, errors]]])
>>     ...
>>     For objects which provide a __unicode__() method, it will call 
>> this method without arguments to create a Unicode string. For all 
>> other objects, the 8-bit string version or representation is requested 
>> and then converted to a Unicode string using the codec for the default 
>> encoding in 'strict' mode.
>> """
>>
>> Note that the documentation basically says that it will call str() on 
>> your object, and then convert it in 'strict' mode.  You should either 
>> define __unicode__ or call str() manually on the object.
> 
> Not a bug, I guess, since it is documented, but it seems a bit bizarre 
> that the encoding and errors parameters are ignored when object does not 
> have a __unicode__ method.

Yeah, I agree it's weird.  I suspect if someone supplied a patch for 
this behavior it would be accepted -- I don't think this should break 
backwards compatibility (much).

STeVe


From jgrahn-nntq at algonet.se  Sun Feb  6 13:06:41 2005
From: jgrahn-nntq at algonet.se (Jorgen Grahn)
Date: 6 Feb 2005 18:06:41 GMT
Subject: An Ode To My Two Loves
References: <mailman.1982.1107624858.22381.python-list@python.org>
Message-ID: <slrnd0cn2e.rr5.jgrahn-nntq@frailea.sa.invalid>

On Sat, 05 Feb 2005 12:33:47 -0500, Jamey Cribbs <jcribbs at twmi.rr.com> wrote:
> At the risk of calling my manhood into question,
...
> Under the influence of some kind of strange force and will probably be 
> embarrassed when he snaps out of it,

You shouldn't be -- I don't think I've seen anyone talk much about this
before, at least not from this angle.

It's something that worries me frequently -- I feel guilty when I introduce
Python into ("force Python upon") an organization. Because I hate having
/other/ people's favorite toy languages forced down /my/ throat ...

I also notice I forget one language after doing another for a few weeks. And
it's not just brackets and semicolons -- I also try to use one language's
idioms in the other. People who /claim/ they have no trouble switching
languages seem to have the same problem.

I refuse to think that Using One Language For Everything is the
solution. But I cannot explain it rationally.

/Jorgen

-- 
  // Jorgen Grahn <jgrahn@       Ph'nglui mglw'nafh Cthulhu
\X/                algonet.se>   R'lyeh wgah'nagl fhtagn!


From sean_mcilroy at yahoo.com  Mon Feb 28 14:29:24 2005
From: sean_mcilroy at yahoo.com (Sean McIlroy)
Date: 28 Feb 2005 11:29:24 -0800
Subject: String Replace Problem...
References: <mailman.3138.1109605552.22381.python-list@python.org>
Message-ID: <e5063e96.0502281129.5e129061@posting.google.com>

I can't claim to have studied your problem in detail, but I get
reasonable results from the following:

filename = 'Errors.txt'
S = open(filename,'r').read().split()
f = lambda x: (x[0]=='@' and x[6:] + '.0') or (x=='/' and x + '\n') or
x
open(filename,'w').write(' '.join(map(f,S)))

HTH

-------------------------------------------------------------------------


andrea.gavana at agip.it wrote in message news:<mailman.3138.1109605552.22381.python-list at python.org>...
> Hello NG,
> 
>       probably this is a basic question, but I'm going crazy... I am unable
> to find an answer. Suppose that I have a file (that I called "Errors.txt")
> which contains these lines:
> 
> MULTIPLY
>   'PERMX'  @PERMX1  1 34  1  20  1 6     /
>   'PERMX'  @PERMX2  1 34  21 41  1 6     /
>   'PERMX'  @PERMX3  1 34  1  20  7 14    /
>   'PERMX'  @PERMX4  1 34  21 41  7 14    /
>   'PERMX'  @PERMX5  1 34  1  20 15 26    /
>   'PERMX'  @PERMX6  1 34  21 41 15 26    /
>   'PERMX'  @PERMX7  1 34  1  20 27 28    /
>   'PERMX'  @PERMX8  1 34  21 41 27 28    /
>   'PERMX'  @PERMX9  1 34  1  20 29 34    /
>   'PERMX'  @PERMX10  1 34  21 41 29 34    /
>   'PERMX'  @PERMX11  1 34  1  20 35 42    /
>   'PERMX'  @PERMX12  1 34  21 41 35 42    /
>   'PERMX'  @PERMX13  1 34  1  20 43 53    /
>   'PERMX'  @PERMX14  1 34  21 41 43 53    /
>   'PERMX'  @PERMX15  1 34  1  20 54 61    /
>   'PERMX'  @PERMX16  1 34  21 41 54 61    /
> /
> 
> I would like to replace all the occurrencies of the "keywords" (beginning
> with the @ (AT) symbol) with some floating point value. As an example, this
> is what I do:
> 
> #  --- CODE BEGIN
> 
> import re
> import string
> 
> # Set Some Dummy Parameter Values
> parametervalues = range(1, 17)
> 
> # Open And Read The File With Keywords
> fid = open("Errors.txt","rt")
> onread = fid.read()
> fid.close()
> 
> # Find All Keywords Starting with @ (AT)
> regex = re.compile("[\@]\w+", re.IGNORECASE)
> keywords = regex.findall(onread)
> 
> counter = 0
> 
> # Try To Replace The With Floats
> for keys in keywords:
>     pars = parametervalues[counter]
>     onread = string.replace(onread, keys, str(float(pars)))
>     counter = counter + 1
> 
> # Write A New File With Replaced Values
> fid = open("Errors_2.txt","wt")
> fid.write(onread)
> fid.close()
> 
> #  --- CODE END
> 
> 
> Now, I you try to run this little script, you will see that for keywords
> starting from "@PERMX10", the replaced values are WRONG. I don't know why,
> Python replace only the "@PERMX1" leaving out the last char of the keyword
> (that are 0, 1, 2, 3, 4, 5, 6 ). These values are left in the file and I
> don't get the expected result.
> 
> Does anyone have an explanation? What am I doing wrong?
> 
> Thanks to you all for your help.
> 
> Andrea.
> 
> ------------------------------------------------------------------------------------------------------------------------------------------
>  Message for the recipient only, if received in error, please notify the
> sender and read http://www.eni.it/disclaimer/


From devnull at joreybump.com  Fri Feb  4 11:21:19 2005
From: devnull at joreybump.com (Jorey Bump)
Date: Fri, 04 Feb 2005 16:21:19 GMT
Subject: ANN: Frog 1.3 released (python 'blog' application)
References: <41fcf53b$0$28986$e4fe514c@news.xs4all.nl>
Message-ID: <Xns95F373835F61Ddevnulljoreybumpcom@199.45.49.11>

Irmen de Jong <irmen at -nospam-remove-this-xs4all.nl> wrote in news:41fcf53b
$0$28986$e4fe514c at news.xs4all.nl:

> I've just uploaded the Frog 1.3 release.
> 
> Frog is a blog (web log) system written in 100% Python.
> It is a web application written for Snakelets.
> It outputs XHTML, is fully unicode compatible, small,
> and doesn't require a database.
> 
> Frog 1.3 uses the same storage format as 1.2 so no conversion
> is required. If you encounter bugs or problems, or want to give
> some feedback, please let me know.

Very nice. I downloaded the complete version and ran it within Cygwin 
without any problems, except that the simple file browser is not included. 
The Files link returns a 404 error.

Are there any plans to include a per user file manager? This would allow 
file management for a large user base, where ftp uploads would be 
impractical and unsafe. 


From jdadson at yahoo.com  Tue Feb  8 20:41:30 2005
From: jdadson at yahoo.com (Jive Dadson)
Date: Wed, 09 Feb 2005 01:41:30 GMT
Subject: interactive execution
Message-ID: <42096A7A.2D8CF4E1@yahoo.com>

How does one execute arbitrary text as code within a module's context?

I've got some code that compiles some text and then executes it.  When
the string is "print 'Hello'", it prints "Hello".  I get no exception
when I compile and execute "foo = 555".  If I then compile and exec
"print foo", I get a name error. The variable foo is undefined. My
assumption is that the "exec" command created a new namespace, put "foo"
in that namespace, and then threw the namespace away.  Or something.

I know it must be possible to do this, because it's exactly what
programs like IDLE do.

Thankee.


From beliavsky at aol.com  Tue Feb  1 15:08:41 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 1 Feb 2005 12:08:41 -0800
Subject: How do you do arrays
References: <tbunce-0102051052450001@192.168.1.12>
Message-ID: <1107288521.396952.154000@z14g2000cwz.googlegroups.com>

If you want do numerical calculations with vectors and matrices, you
should probably use the Numarray module. Python's built-in lists are
not intended for heavy numerical computations. They are more flexible
than the arrays in languages like C and Fortran in that they can store
elements of different types. One can write, for example,
x = ["dog",1,2.3] .



From mahs at telcopartners.com  Thu Feb  3 17:34:14 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 03 Feb 2005 14:34:14 -0800
Subject: remove duplicates from list *preserving order*
In-Reply-To: <BfmdnTjWquaJEZ_fRVn-3A@comcast.com>
References: <BfmdnTjWquaJEZ_fRVn-3A@comcast.com>
Message-ID: <ctu8nt$etf$1@sea.gmane.org>

Steven Bethard wrote:
> I'm sorry, I assume this has been discussed somewhere already, but I 
> found only a few hits in Google Groups...  If you know where there's a 
> good summary, please feel free to direct me there.
> 
> 
> I have a list[1] of objects from which I need to remove duplicates.  I 
> have to maintain the list order though, so solutions like set(lst), etc. 
> will not work for me.  What are my options?  So far, I can see:
> 
> def filterdups(iterable):
>     result = []
>     for item in iterable:
>         if item not in result:
>             result.append(item)
>     return result
> 
> def filterdups(iterable):
>     result = []
>     seen = set()
>     for item in iterable:
>         if item not in seen:
>             result.append(item)
>             seen.add(item)
>     return result
> 
> def filterdups(iterable):
>     seen = set()
>     for item in iterable:
>         if item not in seen:
>             seen.add(item)
>             yield item
> 
> Does anyone have a better[2] solution?
> 
> STeve
> 
> [1] Well, actually it's an iterable of objects, but I can convert it to 
> a list if that's helpful.
> 
> [2] Yes I know, "better" is ambiguous.  If it helps any, for my 
> particular situation, speed is probably more important than memory, so 
> I'm leaning towards the second or third implementation.

How about:

 >>> def filterdups3(iterable):
...     seen = set()
...     def _seen(item):
...         return item in seen or seen.add(item)
...     return itertools.ifilterfalse(_seen,iterable)
...
 >>> list(filterdups3([1,2,2,3,3,3,4,4,4,2,2,5]))
[1, 2, 3, 4, 5]
 >>>

Michael



From raghulj at gmail.com  Fri Feb 25 00:24:53 2005
From: raghulj at gmail.com (Raghul)
Date: 24 Feb 2005 21:24:53 -0800
Subject: wxpython tutorials
Message-ID: <1109309093.384392.59230@l41g2000cwc.googlegroups.com>

hi,

    I want to learn Wxpython to work in windows.Is there any tutorials
available?Pls specify the link that will be easy to learn for beginers
like me



From peterka at xs3.xs4all.nl  Thu Feb  3 08:18:07 2005
From: peterka at xs3.xs4all.nl (Peter van Kampen)
Date: 03 Feb 2005 13:18:07 GMT
Subject: Apache & Python 500 Error
References: <36bkqfF4sjt0oU1@individual.net>
Message-ID: <slrnd0494f.2282.peterka@xs3.xs4all.nl>

On 2005-02-02, Christian <stonis at hotmail.com> wrote:
> Hello,
>
> i have an apache 1.3 server with python on debian. Python works fine but 
>   the scripts wont?t work.
>
> This easy script i want to do on apache:
>
> #!/usr/bin/python
> import os
> os.getcwd()
>
> in apache config i have done this:
>
><Directory /var/www/python>
>      AddHandler python-program .py
>      PythonHandler python
>      Order allow,deny
>      Allow from all
>      #PythonDebug On
></Directory>
>
> the script is in this directory /var/www/python
>
> but i get an 500 error everytime, with "every" script 

You're confusing mod_python and cgi. And you're cgi isn't written
properly...

Try this to enable cgi for python files:

<Directory /var/www/python>
    Options +ExecCGI
    AddHandler cgi-script py
</Directory>

Don't forget to restart apache.

A proper cgi-file outputs a header with at least the content-type. A
header is followed by an empty line.

#!/usr/bin/env python

import os

print "Content-type: text/html"
print
print os.getcwd()

--
Peter van Kampen
pterk -- at -- datatailors.com


From sjmachin at lexicon.net  Sun Feb  6 19:53:21 2005
From: sjmachin at lexicon.net (John Machin)
Date: 6 Feb 2005 16:53:21 -0800
Subject: remove duplicates from list *preserving order*
In-Reply-To: <mailman.2030.1107719436.22381.python-list@python.org>
References: <BfmdnTjWquaJEZ_fRVn-3A@comcast.com>
	<mailman.2030.1107719436.22381.python-list@python.org>
Message-ID: <1107737601.781459.279200@o13g2000cwo.googlegroups.com>


Francis Girard wrote:
> Hi,
>
> I think your last solution is not good unless your "list" is sorted
(in which
> case the solution is trivial) since you certainly do have to see all
the
> elements in the list before deciding that a given element is not a
duplicate.
> You have to exhaust the iteratable before yielding anything.

Last solution? All of them have essentially the same logic to decide
which items to reject.

Further, what you say is true only if you are interpreting Steven's
ambiguous(?) requirement as: remove ALL instances of a bunch of
duplicates. Such a requirement would seem to be (a) just a tad unlikely
and (b) contrary to the output of solutions already shown, which have
brought no protest from Steven.

So, just to remove ambiguity, WHICH one of the bunch should be
retained? Short answer: "the first seen" is what the proverbial "man in
the street" would expect -- "Have you voted already today?" -- it's a
practical requirement and doesn't need any more complicated data
structure than a set of folk who've already voted and no
sleeve-rolling-up.



From rkern at ucsd.edu  Tue Feb  8 06:12:29 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Tue, 08 Feb 2005 03:12:29 -0800
Subject: Big development in the GUI realm
In-Reply-To: <mailman.2154.1107858003.22381.python-list@python.org>
References: <mailman.2123.1107820051.22381.python-list@python.org><4i3g01tv48qr50g8fjc8nf3n09eaauaen5@4ax.com><cu95nd$7cr$1@news1.ucsd.edu><6h7g0113up1v76k7qkad7bt17os1q73510@4ax.com><4208237b$0$21623$a1866201@visi.com>	<cu98n4$833$1@news1.ucsd.edu><4208373e$0$21620$a1866201@visi.com>	<cu9eg0$9jb$1@news1.ucsd.edu><mailman.2149.1107853311.22381.python-list@python.org>	<cua0eq$ecj$1@news1.ucsd.edu>
	<mailman.2154.1107858003.22381.python-list@python.org>
Message-ID: <cua6qo$g62$1@news1.ucsd.edu>

Fredrik Lundh wrote:
> Robert Kern wrote:
> 
> 
>>Fair enough. The only time I've seen it in dead-tree print was in Heinlein's _Time Enough For 
>>Love_, unattributed to anyone else.
> 
> 
> if that's true, it would seem that it predates the Hanlon reference by a
> couple of years:
> 
>     http://www.statusq.org/archives/2001/12/04
> 
> on the other hand, Google tells me that "Time Enough For Love" con-
> tains a couple of other famous stupidity quotes, including:
> 
>     "Never underestimate the power of human stupidity"
> 
> do you still have a copy of the book?  (preferrably a version printed
> before 1980...)

Not at the moment. I'll try to hit up some used book stores or libraries.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From yuba at conwaycorp.net  Wed Feb 16 10:46:30 2005
From: yuba at conwaycorp.net (yuba at conwaycorp.net)
Date: Wed, 16 Feb 2005 09:46:30 -0600
Subject: Working With Forms
Message-ID: <1108568790.42136ad666be0@mail.conwaycorp.net>

Hello-

I have been asked to design a routine to query a database and write the results
out in a way that will fit on a specified form.  I think it would be better if
I could work with the form and overlay the data in Python, then either write it
out to a file or print it.  I have worked with the reportlab pdf library and the
Python Imaging Library but have never tried anything like this before.  The form
is complex (it's a Health Care Benefit Report Form) which I have in pdf and png
format.

Since this is an area where I have very little experience, does anyone have
advise, examples, warnings, etc. for me?  How do I go about writing out a form
with dynamic information?

Thanks!
--greg


-----------------------------------------------------------------------------
This message was sent using Conway Corporation WebMail -- www.conwaycorp.net


From irmen.NOSPAM at xs4all.nl  Sun Feb 13 11:50:31 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sun, 13 Feb 2005 17:50:31 +0100
Subject: ANN: Pyro 3.5 beta (remote objects)
Message-ID: <420f850a$0$28982$e4fe514c@news.xs4all.nl>

I'm glad to announce the new version of Python's own powerful
remote method invocation technology -- Pyro 3.5 (beta)!

You can get it via http://pyro.sourceforge.net, then go
to the SF project homepage download area.

It has many new features and improvements over Pyro 3.4,
which was released almost a year ago.

Most important new stuff:
- more efficient socket code, up to 20% performance gain
- mobile code bug fixes
- name server bug fixes
- added a few interesting new examples
- manual has been updated
- various other minor fixes and improvements

For the full list, see the change log in the manual:
http://pyro.sourceforge.net/pyro-manual/12-changes.html#latest

Because it is a beta release, there may still be bugs.
Please test this version and let me know of any issues.

Have fun, and thanks for your interest, support, and feedback!

--Irmen de Jong


---> What is Pyro?
Pyro is an acronym for PYthon Remote Objects. Pyro is an advanced and
powerful Distributed Object Technology system written entirely in Python,
that is designed to be very easy to use.

It is extremely easy to implement a distributed system with Pyro, because all
network communication code is abstracted and hidden from your application.
You just get a remote Python object and invoke methods on the object on
the other machine.

Pyro offers you a Name Server, an Event Service, mobile objects, remote
exceptions, dynamic proxies, remote attribute access, automatic
reconnection, a very good and detailed manual, and many examples to get
you started right away.


From erikbethke at gmail.com  Tue Feb  8 10:35:10 2005
From: erikbethke at gmail.com (Erik  Bethke)
Date: 8 Feb 2005 07:35:10 -0800
Subject: in wxPython,
	how to minimize the window in absence of minimize button?
In-Reply-To: <1107876309.633248.318460@o13g2000cwo.googlegroups.com>
References: <1107876309.633248.318460@o13g2000cwo.googlegroups.com>
Message-ID: <1107876910.316162.251920@z14g2000cwz.googlegroups.com>

Damn,

I am dumb...

self.Iconize( True )

Sorry.

But a helpful tip is that the demo code *surrounding* the wxPython demo
is VERY useful, I never looked at that before!



From tjreedy at udel.edu  Sun Feb 27 16:08:33 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 27 Feb 2005 16:08:33 -0500
Subject: lambda strangeness??
References: <v73321hkh2v7bhrnj7enet296entdj5drb@4ax.com>
Message-ID: <cvtck5$om$1@sea.gmane.org>


"Alan Gauld" <alan.gauld at btinternet.com> wrote in message 
news:v73321hkh2v7bhrnj7enet296entdj5drb at 4ax.com...
>>>> adds = [lambda y: (y + n) for n in range(10)]

To bind the definition-time value of n to the function,
[lambda y,n=n:(y+n) for n in range(10)]

Terry J. Reedy






From ville at spammers.com  Fri Feb 25 02:32:20 2005
From: ville at spammers.com (Ville Vainio)
Date: 25 Feb 2005 09:32:20 +0200
Subject: Best IDe
References: <0bvTd.52404$wc.42219@trnddc07>
	<1109295091.836841.78690@z14g2000cwz.googlegroups.com>
	<mailman.3030.1109298721.22381.python-list@python.org>
Message-ID: <du7d5upqem3.fsf@amadeus.cc.tut.fi>

>>>>> "Jaime" == Jaime Wyant <programmer.py at gmail.com> writes:

    Jaime> What wing does have going for it is a REALLY good
    Jaime> auto-completion system.  Yeah it's slow, but its good.  You
    Jaime> wing hints as to what objects are by using isinstance().
    Jaime> For example, the code below tells wing that frame is a
    Jaime> wx.Frame ->

    Jaime> # make_frame returns a wx.Frame
    Jaime> frame = make_frame()

    Jaime> isinstance(frame, wx.Frame)

    Jaime> Once wing has a hint, it'll autocomplete the methods /
    Jaime> properties for you.  But again, it is slow.

Other IDEs, please take the hint. That should be trivial to implement
once you have basic autocompletion system in place (e.g. SPE). That
still leads to code clutter but it will do until someone implements a
proper type inference system... Of course it should also heed the
isinstance line when it's commented out.

    Jaime> As far as free software goes, I really like stani's python
    Jaime> editor.  It seems to *watch* methods that you call on an
    Jaime> object and autocomplete based on that.  For example suppose

Yeah, SPE seems to be quite a solid offering - but pydev (the Eclipse
plugin) seems to be getting there really fast also. It also has a
debugger that SPE lacks.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From ilias at lazaridis.com  Mon Feb 14 18:08:15 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 01:08:15 +0200
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <Xns95FD7EAD8A162duncanrcpcouk@127.0.0.1>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108370491.792820.142200@z14g2000cwz.googlegroups.com>
	<cuprg2$6rt$1@usenet.otenet.gr> <37bcdkF5bg7knU1@individual.net>
	<cupumi$kfs$1@usenet.otenet.gr> <37bel6F59jvkgU1@individual.net>
	<cuq4d6$fqp$1@usenet.otenet.gr>
	<Xns95FD7EAD8A162duncanrcpcouk@127.0.0.1>
Message-ID: <curb0t$67k$2@usenet.otenet.gr>

Duncan Booth wrote:
> Ilias Lazaridis wrote:
> 
>>>There is a OS-tool-chain supported on windows, cygwin. 
>>
>>this depends on cygwin.dll, which is GPL licensed
>>
>>[or am I wrong?]
> 
> It is GPL licensed with an amendment which prevents the GPL spreading to 
> other open source software with which it is linked.
> 
> "In accordance with section 10 of the GPL, Red Hat, Inc. permits programs 
> whose sources are distributed under a license that complies with the Open 
> Source definition to be linked with libcygwin.a without libcygwin.a itself 
> causing the resulting program to be covered by the GNU GPL."

If I understand this right, I cannot produce commercial software with 
the cygwin toolset.

.

-- 
http://lazaridis.com


From sjmachin at lexicon.net  Sun Feb 20 21:05:59 2005
From: sjmachin at lexicon.net (John Machin)
Date: 20 Feb 2005 18:05:59 -0800
Subject: Tuple index
In-Reply-To: <cvbcc6$b5f$1@news.netins.net>
References: <cvbcc6$b5f$1@news.netins.net>
Message-ID: <1108951559.490554.305310@l41g2000cwc.googlegroups.com>


Steve M wrote:
> Hello,
>
>         I'm trying to figure out the index position of a tuple
member.
> I know the member name, but I need to know the members index
position.

Tuples, like lists, don't have members in the sense that they can be
"named" like t.foo. The only way of referring to them is by index,
t[4].

> I
> know that if I use the statement print tuple[4] that it will print
the
> contents of that location. What I don't understand is if I know that
foo is
> a member of tuple, how do I get foo's index position.

You *can't* "know that foo is a member of tuple".

Consider this:

>>> foo = 'carol'
>>> t = (123,456,789,'bob',foo,'ted')
>>> t[4]
'carol'

Is that what you mean by "foo is a member of t'? Well, it's not. foo is
a reference to the string 'carol'. t[4] is also a reference to the
string 'carol'.

Now read on ...

>>> foo = 'alice'
>>> t
(123, 456, 789, 'bob', 'carol', 'ted')
>>> t[4]
'carol'
>>>

Now foo is a reference to the string 'alice'. Nothing to do with t,
either before or now.

Have you read the tutorial found at http://docs.python.org/tut/tut.html
?



From xah at xahlee.org  Sat Feb 19 06:57:56 2005
From: xah at xahlee.org (Xah Lee)
Date: 19 Feb 2005 03:57:56 -0800
Subject: [perl-python] exercise: partition a list by equivalence
In-Reply-To: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
Message-ID: <1108814276.680736.264380@l41g2000cwc.googlegroups.com>

here's the answer to the partition by equivalence exercise.

-------------------------------------------

# Perl code

sub merge($) {
my @pairings = @{$_[0]};

my @interm; # array of hashs

# chop the first value of @pairings into @interm
$interm[0]={$pairings[0][0]=>'x'}; ${interm[0]}{$pairings[0][1]}='x';
shift @pairings;

 N1: for my $aPair (@pairings) {
     for my $aGroup (@interm) {
         if (exists ${$aGroup}{$aPair->[0]})
{${$aGroup}{$aPair->[1]}='x'; next N1}
         if (exists ${$aGroup}{$aPair->[1]})
{${$aGroup}{$aPair->[0]}='x'; next N1}
     }
     push @interm, {$aPair->[0]=>'x'}; ${interm[-1]}{$aPair->[1]}='x';
 }

my @fin = shift @interm;

N2: for my $group (@interm) {
    for my $newcoup (@fin) {
        foreach my $k (keys %$group) {
            if (exists ${$newcoup}{$k}) {map { ${$newcoup}{$_}='x'}
(keys %$group); next N2;}
        }
    }
    push @fin, $group;
}
return map {[keys (%$_)]} @fin;
}

-----------------------------------------------
# Here's a direct translation of the Perl code above into python:
?
?def merge(pairings): # pairings is a list of couples. e.g.
[(9,2),(7,6),...]
?
?    # interm is a list of groups. Each group is a list that hold
?    # equivalent numbers. interm stands for interim result. Each
group
?    # is a dictionary. Keys are numbers, values are all dummy
?    # 'x'. Dictionary is used for ease of dealing with duplicates or
?    # checking existence.
?    interm=[];
?
?    # move first pair of pairings into interm as the first group
?    interm.append({pairings[0][0]:'x', pairings[0][1]:'x'}) ; del
pairings[0]
?
?    # go thru pairings. For each pair, check if it is in any group in
?    # interm. If any part of pair is in a group, then add the other
?    # part into that group. If no part of the pair is in any group,
?    # then add this pair into interm as a new group.
?    for aPair in pairings:
?        for aGroup in interm:
?            if (aGroup.has_key(aPair[0])): aGroup[aPair[1]]='x';
break
?            if (aGroup.has_key(aPair[1])): aGroup[aPair[0]]='x';
break
?        else: interm.append( {aPair[0]:'x'} );
interm[-1][aPair[1]]='x'
?
?    # now make another pass of the groups in interm, because some
pair
?    # that may connect two groups (i.e. with one element in one
group,
?    # and second element in another group), yet the pair is simply
?    # consumed by a group.
?    # This pass will check if there are any element in any other
?    # group, if so, such two groups will be unioned. In this pass, we
?    # move things from interm into fin. fin==final.
?    fin=[]; fin.append(interm.pop(0))
?    for group in interm:
?        for newcoup in fin:
?            for k in group.keys():
?                if newcoup.has_key(k):
?                    for kk in group.keys(): newcoup[kk]='x';
?                break
?            break
?        fin.append(group)
?
?    # now turn the dictionaries into lists for return value
?    result=[];
?    for group in fin: result.append(group.keys())
?    return result
?
-------------------
I wrote this (Perl) program in 2003-09, and now basically forgot all
about the internals. The original Perl code does not have inline
comments, nor public consumable documentation as this is my own
project. In the process of translation and the publication and
explanation on this page, i eventually have to re-acquaint the
algorithm i used as i go thru the lines. I was thinking of a quick
brainless translation word-for-word, but that turned out not possible
as i run into problems.

(While i'm learning Python, i run into frustrations with the Python
Documentation. (although it has far more quality than Perl
documentations). The frustrations with documentations will be appended
to this page later: How to write a tutorial )

The translation problem i run into is this. In Perl, there's a GOTO
construct where in a loop one can say "break XYZ" to jump to a
arbitrary outer loop labeled XYZ. Python has "break" but does not
provide a GOTO jump as in Perl. In the process, i have to actually
figure out (for the first time for me) how loops with GOTO jumps can be
translated to alternative structure. This turned out not to be too
hard. For a GOTO jump to a far outer group, one can use multiple breaks
at the end of each loop, possibly in addiction adding a "else"
clause to the different levels of the loops. (Python language can have
a "else" clause for "for" loops. It is executed when the loop
completes. (as opposed to when a break inside jumped out))

Here is a loop with GOTO, translated into Python without:

 N1: for my $aPair (@pairings) {
     for my $aGroup (@interm) {
         if (exists ${$aGroup}{$aPair->[0]})
{${$aGroup}{$aPair->[1]}='x'; next N1}
         if (exists ${$aGroup}{$aPair->[1]})
{${$aGroup}{$aPair->[0]}='x'; next N1}
     }
     push @interm, {$aPair->[0]=>'x'}; ${interm[-1]}{$aPair->[1]}='x';
 }
?-----------------------------------
?    for aPair in pairings:
?        for aGroup in interm:
?            if (aGroup.has_key(aPair[0])): aGroup[aPair[1]]='x';
break
?            if (aGroup.has_key(aPair[1])): aGroup[aPair[0]]='x';
break
?        else: interm.append( {aPair[0]:'x'} );
interm[-1][aPair[1]]='x'
?

Below is another such trans-structure, distinct from the above.

N2: for my $group (@interm) {
    for my $newcoup (@fin) {
        foreach my $k (keys %$group) {
            if (exists ${$newcoup}{$k}) {map { ${$newcoup}{$_}='x'}
(keys %$group); next N2;}
        }
    }
    push @fin, $group;
}
?-----------------------------------
?    for group in interm:
?        for newcoup in fin:
?            for k in group.keys():
?                if newcoup.has_key(k):
?                    for kk in group.keys(): newcoup[kk]='x';
?                break
?            break
?        fin.append(group)
?

The Python version above has not been tested much, but i suppose it is
fine since it is basically a copy of the Perl code. The Perl version is
fairly reliable, as it went thru the gauntlet of special cases testing
and i've used it over the year in the larger program... however no any
formal proof or exhaustive machine testing has been done. Later i might
write some program to auto-test them... but that'd be another day. The
Python version can also use some clean up, or even rewrite as a program
in the Python language proper. Addenda or Errata will be added on this
page.

PS all together there are some 3 or so solutions posted on the
newsgroups. (one by private email) I will have to filter them out and
study them.

Any interesting or important Addenda or Errata will be emailed out
later.
In addition to being archived here:
 http://xahlee.org/perl-python/partition_by_equiv.html

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From bh at intevation.de  Tue Feb  8 11:36:19 2005
From: bh at intevation.de (Bernhard Herzog)
Date: Tue, 08 Feb 2005 17:36:19 +0100
Subject: python code with indention
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
	<87mzuf9gu8.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
Message-ID: <s9zvf93ovp8.fsf@salmakis.intevation.de>

Nick Vargish <nav+posts at bandersnatch.org> writes:

> "Xah Lee" <xah at xahlee.org> writes:
>
>> is it possible to write python code without any indentation?
>
> Not if Turing-completeness is something you desire.

It's possible to implement a turing machine with a single list
comprehension.  No indentation needed.

   Bernhard

-- 
Intevation GmbH                                 http://intevation.de/
Skencil                                           http://skencil.org/
Thuban                                  http://thuban.intevation.org/


From bjourne at gmail.com  Thu Feb 10 19:37:21 2005
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Fri, 11 Feb 2005 01:37:21 +0100
Subject: namespaces module (a.k.a. bunch, struct, generic object,
	etc.) PEP
In-Reply-To: <pan.2005.02.10.17.14.21.836748@jerf.org>
References: <GaudndOHLML3M5bfRVn-vg@comcast.com>
	<pan.2005.02.10.15.10.26.594432@jerf.org>
	<tdidnQsgbbTiW5bfRVn-pA@comcast.com>
	<pan.2005.02.10.17.14.21.836748@jerf.org>
Message-ID: <740c3aec05021016372f22168@mail.gmail.com>

I like it alot! My only minor complaint is that the name is to long.
Also I *really wish* the Namespace could do this:

r, g, b = col = Namespace(r = 4, g = 3, b = 12)

But alas, I guess that's not doable within the scope of the Namespace PEP. 
 
-- 
mvh Bj?rn


From bpeng at rice.edu  Sun Feb 27 12:06:25 2005
From: bpeng at rice.edu (Bo Peng)
Date: Sun, 27 Feb 2005 11:06:25 -0600
Subject: default value for list access?
Message-ID: <cvsumh$7i2$1@joe.rice.edu>

Dear list,

My program needs to do calculation based on a giving data structure 
(like a sparse matrix) with  lots of missing values (invalid 
indices/keys of lists/dictionaries).

The programing is difficult in that I have to use a try...except block 
for every item access. I have written a function

def getItem(item, idx, default):
   try:
     return item[idx]
   except:
     return default

Then I will have to write a[1]['a'][4] as

getItem( getItem( getItem(a,1,{}), 'a', []), 4, 0)

Is there any way to automatically return 0 when any exception is raised 
for such data acceses? (automatic wrapping a[...] as
  try:
    a[...]
  except:
    0
)

Many thanks in advance.

Bo


From greg.lindstrom at novasyshealth.com  Fri Feb  4 14:33:13 2005
From: greg.lindstrom at novasyshealth.com (Greg Lindstrom)
Date: Fri, 04 Feb 2005 13:33:13 -0600
Subject: EDI x12 --> XML
Message-ID: <4203CDF9.1060505@novasyshealth.com>

Hello, List-

I am working on automating a system accepting input data in EDI x12 
format and would like to convert it to XML.  Before I start, I thought 
I'd ask if anyone has worked on such a beast.  I have seen work by Chris 
Cioffi on parsing EDI records.  Is anything else out there before I 
either write one or use one that I have written in Perl?

Thanks!
--greg--

Greg Lindstrom               501 975.4859
Computer Programmer          greg.lindstrom at novasyshealth.com
NovaSys Health
Little Rock, Arkansas

"We are the music makers, and we are the dreamers of dreams."  W.W.




From jaydonnell at gmail.com  Wed Feb 16 20:34:03 2005
From: jaydonnell at gmail.com (jdonnell)
Date: 16 Feb 2005 17:34:03 -0800
Subject: web spider and password protected pages
In-Reply-To: <RbCdnaiwxvdCb47fRVn-qg@powergate.ca>
References: <1108580601.884193.263890@g14g2000cwa.googlegroups.com>
	<_LudnUg0vJIsLI7fRVn-rA@powergate.ca>
	<1108592930.373112.90560@c13g2000cwb.googlegroups.com>
	<RbCdnaiwxvdCb47fRVn-qg@powergate.ca>
Message-ID: <1108604043.434727.266180@f14g2000cwb.googlegroups.com>

"Nevertheless, perhaps you'll still post the answer here so
that others who come along later can benefit from your
experience in the same way that you benefited from reading
whatever page you found (even if you didn't benefit from
my suggestions...). "

Your funny :) Perhaps you should take your own advice. My guess is that
the google search you described will return different results in a few
months. Your first post won't benefit those who "come along later".

"The spider hangs (waits for username and
pass) when I hit a page that requires .htaccess authentication."

I was using urllib.
urllib2 doesn't have this problem. Simply switching urllib to urllib2
fixed the problem



From joannis.courtis at gmx.de  Thu Feb 24 05:06:54 2005
From: joannis.courtis at gmx.de (Courtis Joannis)
Date: Thu, 24 Feb 2005 11:06:54 +0100 (MET)
Subject: email-adress
Message-ID: <850.1109239614@www71.gmx.net>

Hello Python-team,

please could you delete my email-adress from your mailing list.

Thanks Joannis

-- 
DSL Komplett von GMX +++ Superg?nstig und stressfrei einsteigen!
AKTION "Kein Einrichtungspreis" nutzen: http://www.gmx.net/de/go/dsl


From unknownsoldier93 at yahoo.com  Fri Feb 25 13:51:47 2005
From: unknownsoldier93 at yahoo.com (gf gf)
Date: Fri, 25 Feb 2005 10:51:47 -0800 (PST)
Subject: Converting HTML to ASCII
Message-ID: <20050225185147.43095.qmail@web20703.mail.yahoo.com>

Hans,

Thanks for the tip.  I took a look at Beatiful Soup,
and it looked like it was a framework to parse HTML. 
I'm not really interetsed in going through it tag by
tag - just to get it converted to ASCII.  How can I do
this with B. Soup?

--Thanks

PS William - thanks for the reference to lynx, but I
need a Python solution - forking and execing for each
file I need to convert is too slow for my application 


Hans wrote:
Try Beautiful Soup!

> 1) Be able to handle badly formed, or illegal, HTML,
> as best as possible. 
 From the description:
"It won't choke if you give it ill-formed markup:
it'll just give you access to 
a correspondingly ill-formed data structure."

> Can anyone direct me to something which could help
me
> for this?
http://www.crummy.com/software/BeautifulSoup/

Hans Christian


		
__________________________________ 
Do you Yahoo!? 
Yahoo! Mail - Easier than ever with enhanced search. Learn more.
http://info.mail.yahoo.com/mail_250


From scottmallory at gmail.com  Sat Feb 12 18:25:21 2005
From: scottmallory at gmail.com (scott m)
Date: 12 Feb 2005 15:25:21 -0800
Subject: exec function
In-Reply-To: <JsKdnU6Mpq2uFpPfRVn-sA@is.co.za>
References: <1108245800.126709.8900@g14g2000cwa.googlegroups.com>
	<JsKdnU6Mpq2uFpPfRVn-sA@is.co.za>
Message-ID: <1108250721.032988.59220@g14g2000cwa.googlegroups.com>

Thanks, both of these examples will help me clean my code and improve
it.

Scott



From fabsk+news at free.fr  Thu Feb 17 09:08:36 2005
From: fabsk+news at free.fr (Roger That)
Date: Thu, 17 Feb 2005 15:08:36 +0100
Subject: Convert a raw pointer to IDispatch
Message-ID: <4214a4ef$0$30359$636a15ce@news.free.fr>

Hi,

I am trying to use the function "CreateStreamOnHGlobal" from python code 
(I need to pass an IStream object to MSXML, like I do in C++ code).

I was able to retrieve a pointer on the IStream object in this way:

from ctypes import *

stream = c_int()
windll.ole32.CreateStreamOnHGlobal(c_long(0), c_long(1), byref(stream))
print "%x"%stream.value

The problem is that I would like to attach this pointer to a python 
IDispatch object (in Python only, not using a C++ DLL to do the stuff). 
Do you know a way to do it ?

Thanks for your attention.


From jason at tishler.net  Tue Feb  8 12:55:15 2005
From: jason at tishler.net (Jason Tishler)
Date: Tue, 8 Feb 2005 12:55:15 -0500
Subject: Building Python with Tcl/Tk on Cygwin_NT-5.1
In-Reply-To: <4208E247.8030706@llnl.gov>
References: <41FF5A67.3090606@llnl.gov> <20050201125129.GA432@tishler.net>
	<41FFA7C9.4070308@llnl.gov> <20050202124435.GA2472@tishler.net>
	<4200D056.4010000@llnl.gov> <4200D22D.9070000@llnl.gov>
	<20050202133005.GE2472@tishler.net> <4208E247.8030706@llnl.gov>
Message-ID: <20050208175514.GA3788@tishler.net>

Dean,

On Tue, Feb 08, 2005 at 08:01:11AM -0800, Dean N. Williams wrote:
> $ rebaseall
> /usr/bin/rebaseall: line 70: [: too many arguments
> /usr/bin/rebaseall: line 75: [: too many arguments
> /usr/bin/rebaseall: line 94: $TmpFile: ambiguous redirect
> cannot read /cygdrive/c/Documents
> 
> On my laptop installation everything works just fine. What is the
> difference?

The TMP and/or TEMP environment variables have at least two spaces in
them.

The easiest workaround is to execute rebaseall like the following:

    $ TMP=/tmp rebaseall

Long term I will change rebaseall to deal better with spaces in shell
variables.

Jason

-- 
PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6


From reinhold-birkenfeld-nospam at wolke7.net  Sat Feb 12 07:59:39 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Sat, 12 Feb 2005 13:59:39 +0100
Subject: PHP session equivalent?
In-Reply-To: <cukgrl$g6k$1@sagnix.uni-muenster.de>
References: <420d6010$1@nntp.zianet.com> <cukgrl$g6k$1@sagnix.uni-muenster.de>
Message-ID: <376cthF59hm4uU1@individual.net>

Walter Burleigh wrote:
> Erik Johnson wrote:
> 
>>     There are a lot of things about PHP I was not too keen on and hence
>>     why
>> my company is primarily doing Python these days, but one thing I was quite
>> impressed with was the ease with which it provided session
>> functionality...
> 
> Like you I think it is a big plus of PHP as a beginner's web development
> tool that it provides session management out of the box. It would certainly
> make python more attractive for beginners if they could use session
> management out of the box, too. (I know that there are lots of web
> development frameworks, but they are to be too difficult to learn, if you
> are new to web development).
> 
> There is no module for session management in the python standard library.
> But there are lots of python frameworks that would do this job well (my
> favorite: cherrypy). If you think that a whole framework would be overkill,
> you either could try to recylce the session part of an existing framework,
> or you could write a module for yourself. 
> 
> I have written a module which is quite similar to the php session
> management, except for that it does no url rewriting when cookies are not
> allowed. If you are interested, I will mail you a copy.

If you need session management, and do not want a complicated web app
framework, check out pso: http://pso.sf.net

Reinhold


From steve at holdenweb.com  Wed Feb 23 23:34:02 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 23 Feb 2005 22:34:02 -0600
Subject: Source Encoding GBK/GB2312
In-Reply-To: <1109217736.643721.201240@o13g2000cwo.googlegroups.com>
References: <1109217736.643721.201240@o13g2000cwo.googlegroups.com>
Message-ID: <cvjl7m$sgm$1@sea.gmane.org>

steven at lczmsoft.com wrote:

> When I specify an source encoding such as:
> 
> # -*- coding: GBK -*-
> or
> # -*- coding: GB2312 -*-
> 
> as the first line of source, I got the following error:
> 
> SyntaxError: 'unknown encoding: GBK'
> 
> 
> Does this mean Python does not support GBK/GB2312?  What do I do?
> 

Well, *your* Python might not support GTK:

sholden at dellboy ~
$ cat test90.py
# -*- coding: GBK -*-

print "Hello!"


sholden at dellboy ~
$ python test90.py
Hello!

but Python generally appears to. Do you have encodings/gbk.py in your 
library?

regards
  Steve



From farcepest at gmail.com  Wed Feb  2 09:11:12 2005
From: farcepest at gmail.com (Andy Dustman)
Date: 2 Feb 2005 06:11:12 -0800
Subject: MySQLdb - Tuples
References: <3vTLd.19498$Of5.13133@nntpserver.swip.net>
Message-ID: <1107353472.796039.293100@g14g2000cwa.googlegroups.com>

#########################################33
#! /usr/bin/env python
import MySQLdb
db=MySQLdb.connect(host='localhost', db='photum_0_6_2', user='root',
passwd='thkhgfgd')
c=db.cursor()
c.execute('select person from persons order by person')
for (person,) in c: # or c.fetchall() (may be more portable)
print person
################################################

If you return more than one column, then you don't need the parentheses
for the tuple unpacking. MySQLdb (and all other DB API databases)
return rows as tuples, so if you only select one column, you get a
tuple of one item.

(google groups eats leading spaces)



From marian at mba-software.de  Sun Feb  6 23:43:04 2005
From: marian at mba-software.de (=?ISO-8859-1?Q?Marian_Aldenh=F6vel?=)
Date: Mon, 07 Feb 2005 05:43:04 +0100
Subject: pygame.mixer.music not playing
In-Reply-To: <fJtNd.1869$mG6.1479@newsread1.news.pas.earthlink.net>
References: <36mb0iF54udklU1@individual.net>
	<fJtNd.1869$mG6.1479@newsread1.news.pas.earthlink.net>
Message-ID: <36o9v0F4vboqbU1@individual.net>

Hi,

 > Could it be a hardware problem?

I don't think so. I can play sounds on this machine and I can also play
this very file using Windows Media Player. I suspect it's software, but
I do not know at which level the problem may lie.

Ciao, MM
-- 
Marian Aldenh?vel, Rosenhain 23, 53123 Bonn. +49 228 624013.
http://www.marian-aldenhoevel.de
"Wir brauchen keine Opposition, wir sind bereits Demokraten."


From harlinseritt at yahoo.com  Thu Feb 17 07:15:54 2005
From: harlinseritt at yahoo.com (Harlin)
Date: 17 Feb 2005 04:15:54 -0800
Subject: need of help
In-Reply-To: <mailman.2754.1108641852.22381.python-list@python.org>
References: <mailman.2754.1108641852.22381.python-list@python.org>
Message-ID: <1108642554.032645.155790@f14g2000cwb.googlegroups.com>

Need more info on this. Are you:

1. Trying to create a GUI window of your own making? If so, what
toolkit are you using?

2. Trying to open a web browser? If so, you can do the following:

import os

os.system('path/to/executable options')

or

os.startfile('pagename.html')



From deetsNOSPAM at web.de  Mon Feb 21 10:17:44 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 21 Feb 2005 16:17:44 +0100
Subject: lambda closure question
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
	<slrnd1jjo4.jkb.apardon@rcpc42.vub.ac.be>
	<mailman.2891.1108988864.22381.python-list@python.org>
	<slrnd1jlne.jkb.apardon@rcpc42.vub.ac.be>
	<37u4dpF5cboqvU1@individual.net>
	<slrnd1jrhj.jkb.apardon@rcpc42.vub.ac.be>
Message-ID: <37ucamF5igk7fU2@individual.net>

> I have the impression that you misunderstood me. I'm not after a
> side-effect free language. I just think python could be nicer in
> allowing some side-effects.

Yeah, seems as if I somehow added an inadvertent "not" somewhere in my train
of thoughts while reading (and hopfully comprehending...) your post. Sorry.
-- 
Regards,

Diez B. Roggisch


From BOOGIEMANPN at YAHOO.COM  Tue Feb 15 17:35:05 2005
From: BOOGIEMANPN at YAHOO.COM (BOOGIEMAN)
Date: Tue, 15 Feb 2005 23:35:05 +0100
Subject: How do I make my program start fullscreen ?
Message-ID: <17smpt9l5tn7z.1744dg3zal7hj.dlg@40tude.net>

os = windows xp 
How do I make "myprogram.py" start fullscreen at windows command prompt ?
Also I made it as "myprogram.exe" with py2exe,but how to start fullscreen ?


From samantha7395 at hotmail.com  Fri Feb 25 00:16:28 2005
From: samantha7395 at hotmail.com (Samantha)
Date: Thu, 24 Feb 2005 21:16:28 -0800
Subject: Output File
Message-ID: <Xa2dnWeU9v84KYPfRVn-jQ@adelphia.com>

Is there a limit on the size of the file Python will read then output. I am 
reading a file of 433 lines and when I output the same file it only will 
output 421 lines. The last line is cut off also. This is the code I am using 
as a test.

input = open(r'C:\Documents and Settings\Owner\Desktop\somefile.html','r')
L = input.readlines()
input.close

output = open(r'C:\Documents and 
Settings\Owner\Desktop\somefile_test.html','w')
for t in range(len(L)):
 output.writelines(L[t])
output.close

Also is there a way to test for EOF in Python?
Thanks
S 




From peter at engcorp.com  Sat Feb 12 22:28:37 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 12 Feb 2005 22:28:37 -0500
Subject: SCons build tool speed
In-Reply-To: <SBsPd.4406$ZZ.3056@newssvr23.news.prodigy.net>
References: <SBsPd.4406$ZZ.3056@newssvr23.news.prodigy.net>
Message-ID: <gOOdnTpZnaZCVJPfRVn-3w@powergate.ca>

ted wrote:
> How does the speed of the Scons build tool compare with Ant? Right now with 
> out Ant builds take around an hour. Hoping to speed that up.

Don't tools like Scons, Ant, and for that matter "make" just
execute other programs?  So that 99% of the time is consumed
external to the Scons, Ant, or make process itself?  Why
do you think the speed of the build tool is of any significance
compared to the time for things like compilers and linkers
to execute?

-Peter


From ug at algonet.se  Wed Feb  9 05:22:35 2005
From: ug at algonet.se (=?ISO-8859-1?Q?Ulf_G=F6ransson?=)
Date: Wed, 09 Feb 2005 11:22:35 +0100
Subject: Python mail filter
In-Reply-To: <4208f1d0$1@news.starhub.net.sg>
References: <4208f1d0$1@news.starhub.net.sg>
Message-ID: <cucoco$7q0$1@yggdrasil.glocalnet.net>

Mailer wrote:
> The basic premise, as I understand is this:
> 
> Read mail from stdin
> Parse headers etc using rfc822 or email module
> Process
> 
> # Now I need to do one of the following:
> 
> # Discard mail
> # Pass through
> # Forward to another account, possibly modifying the mail
> 
> Now that I have coded up some stuff, the first looks easy - mails are
> getting lost. So the question is (may not be entirely specific to Python),
> how do I achieve the other two?
> 
> Currently, I have set up a .forward that pipes the mail to my script. I can
> verify that this works by dumping the contents to a file. If I write to
> stdout, however, the mail is not delivered. That doesn't quite look right
> either - it's probably too late for the MTA to pick up. What I want to do is
> to pass the processed mail back to Postfix so it can deliver it to the
> correct local mail box.

I think something like this might work (snipped from a small script I 
use to email log files to myself):

smtp = smtplib.SMTP('localhost')
smtp.sendmail(sender, rcpt, msg.as_string())
smtp.close()

Regardless of MTA software, this should resend whatever is in msg (in my 
case a MIMEMultipart). If it should be forwarded, just change rcpt and 
the To: header.

Unless of course, the server is configured to block messages sent by 
localhost claiming to be from somewhere else...

/ug


From alecw at pobox.com  Thu Feb 24 09:25:32 2005
From: alecw at pobox.com (Alec Wysoker)
Date: 24 Feb 2005 06:25:32 -0800
Subject: Trouble with mysql-python 1.2.0 on Solaris 8 sparc
In-Reply-To: <1108925639.345790.230510@c13g2000cwb.googlegroups.com>
References: <1108755202.574729.293610@g14g2000cwa.googlegroups.com>
	<1108925639.345790.230510@c13g2000cwb.googlegroups.com>
Message-ID: <1109255132.541839.207530@o13g2000cwo.googlegroups.com>

Hi Andy,

Thanks for your message.  It turned out that I had installed 64-bit
mySql on a 32-bit machine.  I'm amazed it worked at all.  Anyway, I
finally got mysql-python built, but I'm unable to connect to a machine
on a remote host.  The problem doesn't seem to be with the python code,
because I'm unable to do it even with the mysql command-line client.
Sigh.



From steve at holdenweb.com  Mon Feb 28 10:39:57 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 28 Feb 2005 09:39:57 -0600
Subject: TKinter
In-Reply-To: <38eb4lF5nldh7U1@individual.net>
References: <38eb4lF5nldh7U1@individual.net>
Message-ID: <_WGUd.36575$%U2.4921@lakeread01>

anthonyberet wrote:

> So, is it pronounced 'Tee-Kinter', or 'Tee-Kay-Inter'?
> I don't want to appear as a dork down the pub.

If anyone down your pub knows enough about Python to understand what 
TKinter is I very much doubt they'll be rude enough to call you a dork 
for displaying your ignorance.

that's-my-kind-of-pub-ly y'rs  - steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From eric_brunel at despammed.com  Fri Feb 18 04:17:46 2005
From: eric_brunel at despammed.com (Eric Brunel)
Date: Fri, 18 Feb 2005 10:17:46 +0100
Subject: Hello File.py
References: <1108714621.002948.226480@c13g2000cwb.googlegroups.com>
Message-ID: <opsmdyrwssrqur0o@eb.pragmadev>

On 18 Feb 2005 00:17:01 -0800, Lith <lith.usenet at gmail.com> wrote:
>
> Here's a simple script, where I want to use a GUI to select a file.
> (And eventually do something interesting with it.) Some problems
> appear.
>
> (1) Why does it call MenuOpen automatically?

Because this code:

>     menuFile.add_command(label='Open', command=MenuOpen(parent=root))

*calls* your MenuOpen function and assign its *returned value* to the command option in your menu. You need to pass the function itself, not call it. In fact, you did it correctly in:

>     menuFile.add_command(   label='Exit', command=sys.exit)

Here, you pass the sys.exit function. What you did above is as if you wrote:
menuFile.add_command(label='Exit', command=sys.exit())
With this line, sys.exit gets called and your application will terminate immediatly.

As for the line above, the general solution is to do:

menuFile.add_command(label='Open', command=lambda root=root: MenuOpen(root))

The 'lambda' stuff creates an anonymous function that will call your MenuOpen function when the menu is selected. For more details, please refer to the Python tutorial - http://docs.python.org/tut/node6.html#SECTION006750000000000000000

But here, you don't even need that, since the root window is the default parent for all Tkinter dialogs, so doing:

menuFile.add_command(label='Open', command=MenuOpen)

is enough.

> (2) Why won't it open when I choose the menu item?

Since you assigned the value returned by MenuOpen to the command option, and since MenuOpen doesn't return anything, there is no command associated to your menu and it does nothing at all.

> (3) Python Cookbook gave me the sys.exit call, if I run it from IDLE it
> gives me a traceback. Should I be using something else?

No you shouldn't; I don't know exactly how IDLE handles this, but the way sys.exit() terminates your program is actually by raising an exception. In regular usage, i.e. if you run your Python script from the command line, you'll never see this exception. Maybe IDLE treats it like any other one; any experience on this topic, anyone?

> (4) Does tkFileDialog have any useful official documentation? The main
> google results for it don't even give the possible parameters for the
> function calls, or sample code showing how to use.

The best documentation you'll ever find is the tcl/tk one, e.g. here: http://www.tcl.tk/man/tcl8.4/TkCmd/contents.htm
The corresponding functions are tk_getOpenFile & tk_getSaveFile; you'll just have to convert the '-option value' syntax to 'option=value' to be able to use it via Tkinter.

> (5) Is the 'parent = parent,' line just plain wrong?

It may look so, but it isn't: the parent at the left is the name for a keyword parameter for the function and the one at the right is the name of a variable. There is no possible confusion here, and this form is actually quite frequent.

> Feel free to note any horrors you see.

Just one little thing: if you declare:

def MenuOpen(parent): ...

you'd better call it via:

MenuOpen(root)

and not:

MenuOpen(parent=root)

The 'parent=' stuff is unnecessary and may be confusing, since this syntax is often used only when you declare a function with keyword parameters like:

def f(arg, **kwdParams): ...

HTH
  - Eric Brunel -


From edvard+news at majakari.net  Fri Feb 25 14:27:29 2005
From: edvard+news at majakari.net (Edvard Majakari)
Date: Fri, 25 Feb 2005 21:27:29 +0200
Subject: Unit testing - one test class/method, or test class/class
References: <87y8ddywr9.fsf@titan.staselog.com>
	<opsmrlcwyz6yt6e7@news.cisco.com>
Message-ID: <87ll9cfnj2.fsf@titan.staselog.com>

aurora <aurora00 at gmail.com> writes:

> What I really want to bring up is your might want to look at refactoring
> your module in the first place. 348 test cases for one module sounds like a
> large number. That reflects you have a fairly complex module to be  tested
> to start with. Often the biggest benefit of doing automated unit testing is
> it forces the developers to modularize and decouple their code  in order to
> make it testable. This action alone improve that code quality  a lot. If
> breaking up the module make sense in your case, the test  structure will
> follows.

Here I have to emphasize a little: of those 348 test cases, only ~30 or so
are real, hand-coded methods. Some of the tests are generated on the fly by
py.test. It is not as fancy as it sounds, though. All it does is

test_some_feature(self):

     for foo, bar, expected in known_values:
         yield self.foo_bar_equals, foo, bar, expected

def foo_bar_equals(self, foo, bar, expected):
         
     assert some_feature(foo, bar) == expected

There are two methods. However, if known_values contains 100 tuples, 
py.test generates 100 "test methods" on the fly. Of course you could just do

test_some_feature(self):

     for foo, bar, expected in known_values:
         assert some_feature(foo, bar) == expected

but then you wouldn't see so easily which values are tested when you use
verbose mode, that is. That's one of the (many) nice things in py.test I
like :)

However, being practical in testing is probably more worth than being
completely orthodox, on that I agree. That's why I seldom stick to strict
rules in doing tests, though being systematic helps alot, especially
regarding orthogonality. It doesn't help to test same features over and
over again. Eg. if I wrote a test for a dot in 2D space, I'd write tests for
dot on origo, on positive x-axis with y < 0 and y > 0, ditto for x and y
reversed, then same tests for negative x and y, and last for positive and
negative x and y with other being exactly zero. There's no point testing
other values; all other combinations fall to some of the categories
mentioned.

-- 
# Edvard Majakari		Software Engineer
# PGP PUBLIC KEY available    	Soli Deo Gloria!

$_ = '456476617264204d616a616b6172692c20612043687269737469616e20'; print
join('',map{chr hex}(split/(\w{2})/)),uc substr(crypt(60281449,'es'),2,4),"\n";


From fredrik at pythonware.com  Mon Feb  7 13:41:11 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 7 Feb 2005 19:41:11 +0100
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com><mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
Message-ID: <cu8cl9$5uh$1@sea.gmane.org>

"Luke Skywalker" wrote:

> What I find weird, is that I always understood the GPL meaning that
> you must give back any contribution you made to the source code of the
> GPLed code, but not if you're just using either a binary distribution
> (eg. a DLL) or if you copy/pasted the code as is, with no changes on
> your own.
>
> If this is true, then the fact that Qt is now GPLed for Windows means
> that I should be able to use this widget set even in commercial apps
> since I'm not making any change to Qt, just using it.
>
> Am I totally off-target?

yes.  for details, see the "Combining work with code released under the
GPL" section on this page:

    http://www.gnu.org/licenses/gpl-faq.html

</F> 





From mjs7231 at gmail.com  Wed Feb 16 09:55:30 2005
From: mjs7231 at gmail.com (mjs7231)
Date: 16 Feb 2005 06:55:30 -0800
Subject: adding new functionality to a function non-intrusively!
References: <1108564620.657526.301320@g14g2000cwa.googlegroups.com>
Message-ID: <1108565730.135442.174550@l41g2000cwc.googlegroups.com>

Whenever I want to add functionality to a function while still allowing
it to word as it was before my edit would be to include a few optional
variables passed to the string.  something to this effect would look
like:

------------------------------------------
BEFORE:
------------------------------------------
def myfunction(a, b):
    return (a + b)
------------------------------------------
AFTER:
------------------------------------------
def myfunction(a, b, op="add"):
    if (op == "add"):
        return (a + b)
    else:
        return (a - b)
------------------------------------------



From mail.python.org at bdash.net.nz  Thu Feb 17 15:24:05 2005
From: mail.python.org at bdash.net.nz (Mark Rowe)
Date: Fri, 18 Feb 2005 09:24:05 +1300
Subject: msnp, friends list
In-Reply-To: <1108665091.090003.59630@c13g2000cwb.googlegroups.com>
References: <1108665091.090003.59630@c13g2000cwb.googlegroups.com>
Message-ID: <d9f0e9c7d597aebdd91ab332f425c817@bdash.net.nz>


On Feb 18, 2005, at 7:31 AM, jr wrote:

> I'm currently using the msnp.py code from Manish Jethani's project. I
> havn't been able to get the friends list to update like it should. it
> works once out of about every 25 times the program loads.
>
> Has anyone been able to implement his code and get the friends list to
> actively update? Or have any suggestions?

I just spent a few minutes experimenting, and it seems that the 
following code does what you would like:

import msnp
import time

class MsnListener(msnp.SessionCallbacks):
     def friend_list_updated(self, friend_list):
         print 'Got friend list update:', friend_list.lists

msn = msnp.Session(MsnListener())
msn.login('xxxxxxxx at xxxx.com', 'xxxxxxx')
msn.sync_friend_list()

while True:
     msn.process()
     time.sleep(1)

> Any info would be great.
> Thanks.

Hope this helps,

Mark Rowe
<http://bdash.net.nz/>



From reinhold-birkenfeld-nospam at wolke7.net  Sat Feb 26 08:23:31 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Sat, 26 Feb 2005 14:23:31 +0100
Subject: function expression with 2 arguments
In-Reply-To: <1109419984.213993.49280@f14g2000cwb.googlegroups.com>
References: <1109419984.213993.49280@f14g2000cwb.googlegroups.com>
Message-ID: <38bbg9F5jhauiU1@individual.net>

Xah Lee wrote:
> is there a way to write a expression of a function with more than 1
> argument?
> 
> e.g., i want a expression that's equivalent to
> 
> def f(x,y)
>   return x+y

Looking for lambda?

Reinhold


From curty at free.fr  Thu Feb 17 10:15:02 2005
From: curty at free.fr (Curt)
Date: 17 Feb 2005 15:15:02 GMT
Subject: Getting milliseconds in Python
References: <1108565135.167562.196830@z14g2000cwz.googlegroups.com>
	<37h5epF5ck38lU2@individual.net>
	<1108571009.698970.152020@z14g2000cwz.googlegroups.com>
	<cv0100$715$1@eeyore.INS.cwru.edu>
	<mailman.2706.1108577006.22381.python-list@python.org>
	<cv0gru$802$1@eeyore.INS.cwru.edu>
Message-ID: <slrnd19d00.1ep.curty@einstein.electron.net>

On 2005-02-16, Brian Beck <exogen at gmail.com> wrote:
>>>
>>>seconds * 100 = milliseconds
>> 
>> 
>> are you sure you know what a millisecond is?
>> 
>> (duck) 
>
> Touch?.
>
> But it was a typo.

Oh, you meant 'seconds / 100 = milliseconds'?

(canard)


From caleb1 at telkomsa.net  Wed Feb  2 22:08:36 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Wed, 02 Feb 2005 22:08:36 -0500
Subject: Two classes problem
References: <mailman.1768.1107369788.22381.python-list@python.org>
Message-ID: <opsllpombg1js0xs@news.telkomsa.net>

Hi

It would help if you could describe the purpose you have in mind for doing  
this.   There is a cute way of doing what you want:

===file: a.py===
# module a.py
test = 'first'
class aclass:
     def __init__(self, mod, value):
         mod.test = value                # Is there another way to refer to  
the module this class sits in?
===end: a.py===

===file: b.py===
# file b.py
import a
x = a.aclass(a,'monkey')
print a.test
===end: b.py===

When you run "b.py", you will see 'monkey' printed.  What we have done  
here is passed the reference to the *module* a to the constructor for  
aclass, and that constructor modified the module variable "test".  This is  
a way to avoid using 'global', or in other words, the namespaces of things  
are still clear (for me anyway).

Cya
Caleb



On Thu, 3 Feb 2005 00:13:05 +0530, Gurpreet Sachdeva  
<gurpreet.sachdeva at gmail.com> wrote:

> I have two classes;
>
> a.py -->
>
> #!/usr/bin/python
> global test
> test =''
> class a(b):
>         def __init__(self,test):
>                 print test
> print 'Outside: '+test
>
> b.py -->
>
> #!/usr/bin/python
> import a
> a.a('Garry')
>
> I want to pass this string (or any object later) to a.py and that too
> outside the scope of class a.
> Is that possible??? If yes, how???
>
> Thanks,
>
> Garry



From tom.willis at gmail.com  Fri Feb 11 08:00:05 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Fri, 11 Feb 2005 08:00:05 -0500
Subject: Unit Testing in Python
In-Reply-To: <740c3aec050211033959897e02@mail.gmail.com>
References: <1108087841.271630.228970@o13g2000cwo.googlegroups.com>
	<740c3aec050211033959897e02@mail.gmail.com>
Message-ID: <b54d0489050211050040907708@mail.gmail.com>

I've had great experience doing Test Driven Development. Ideally you
would do it from the start, but it is great for refactoring as well.
In any language.

One of the pitfalls to look out for is to not get too hung up on it. 
In the end it's just a tool you use at your discretion. When I first
started doing it, I would get hung up on how the test framework should
look etc... almost as if I was architecting a system. It really slowed
me down.

I now take this approach...

1. what is the smallest piece of functionality that I want? (What to test)
2. what test will confirm I have this functionality?(How to test it)
3. how will I access this functionality.(Define the API)
4. write test
5. write code
6. run test.
7. repeat 4,5,6 until you're happy.

Frameworks like xUnit etc... just enhance the experience but are in no
way required in my opinion.
 
Another nice side effect is that your architecture design then comes
naturally and it is exactly what you need nothing more, nothing less.

I recently converted a very problematic data migration routine that
was written in Transact SQL by a consultant who liked to push the
limits of their chosen tool.

I wrote it in Python because I was predicting that no one could nail
down all the possible permutations of data that might come through. I
needed the ability for the routine to be flexible.

Anywho, using python and TDD I was able to get functionality
running/tested from minute 1 using only XEmacs and ipython.





On Fri, 11 Feb 2005 12:39:07 +0100, BJ?rn Lindqvist <bjourne at gmail.com> wrote:
> > put it) PyUnit project. I'm sorry if this is a obvious question or one
> > that has already been answered, but unit-testing sounds interesting and
> > I'm not sure where to start.
> 
> Hi Ryan. I belive this (http://www.xp123.com/xplor/xp0201/index.shtml)
> is a good way to learn about unit testing by practice if you already
> know the basics of it. It is written in Java but is easy to translate
> to Python. Unittesting really is great in Python, I try to use it for
> anything but simple and dirty hacks.
> 
> --
> mvh Bj?rn
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
Thomas G. Willis
http://paperbackmusic.net


From michele.simionato at gmail.com  Fri Feb  4 07:59:51 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 4 Feb 2005 04:59:51 -0800
Subject: making symlinks with distutils
In-Reply-To: <pan.2005.02.04.12.43.05.772727@logilab.fr>
References: <1107513934.428944.257820@z14g2000cwz.googlegroups.com>
	<pan.2005.02.04.10.59.14.434381@logilab.fr>
	<1107518485.557475.312410@c13g2000cwb.googlegroups.com>
	<pan.2005.02.04.12.43.05.772727@logilab.fr>
Message-ID: <1107521991.596192.190310@c13g2000cwb.googlegroups.com>

Sylvain Thenault:
> Actually it does install it is $PREFIX/bin.

Aha! And how do I set $PREFIX? Is it a Unix environment variable or is
it
a keyword argument in setup? Something like setup( prefix="/usr") ?



From benjamin.cordes at blawrc.de  Mon Feb 14 07:28:09 2005
From: benjamin.cordes at blawrc.de (benjamin.cordes at blawrc.de)
Date: 14 Feb 2005 04:28:09 -0800
Subject: nested lists as arrays
Message-ID: <1108384089.804375.179130@f14g2000cwb.googlegroups.com>

Hi,

why can't I do this:

        dummy = self.elements[toy][tox]

        self.elements[toy][tox] = self.elements[fromy][fromx]
        self.elements[fromy][fromx] = dummy

after initialising my nested list like this:

       self.elements = [[0 for column in range(dim)] for row in
range(dim) ]



From jerf at jerf.org  Tue Feb  8 08:57:23 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 08 Feb 2005 08:57:23 -0500
Subject: turing machine in an LC
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
	<87mzuf9gu8.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<s9zvf93ovp8.fsf@salmakis.intevation.de>
	<pan.2005.02.08.12.47.00.135408@jerf.org>
	<mailman.2206.1107888580.22381.python-list@python.org>
Message-ID: <pan.2005.02.08.13.57.21.519105@jerf.org>

On Tue, 08 Feb 2005 10:50:24 -0800, Michael Spencer wrote:
> I see no difference between LCs and GEs in this respect:
> 
>   >>> import itertools as it
>   >>>
>   >>> def fact_ge(n):
>   ...     f = [1]
>   ...     f.extend(i*j for i,j in it.izip(xrange(1,1+n), f))
>   ...     return f
>   ...
>   >>> def fact_lc(n):
>   ...     f = [1]
>   ...     [f.append(i*j) for i,j in it.izip(xrange(1,1+n), f)]
>   ...     return f

The comments in my other post still hold true w.r.t. these not being just
LCs or genexps, but you have a point here. Allowing an external list will
give you the storage you need even for a LC.

OK then, I still don't quite see how you can build a Turing Machine in one
LC, but an LC and one preceding list assignment should be possible,
although the resulting list from the LC is garbage; the preceding list
will have the actual state data.



From apardon at forel.vub.ac.be  Fri Feb 18 09:55:42 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 18 Feb 2005 14:55:42 GMT
Subject: difference between class methods and instance methods
References: <pan.2005.02.17.07.04.37.907754@yahooz.com>
	<Xns96005FE3164DAduncanrcpcouk@127.0.0.1>
	<1119g2rre5g610c@corp.supernews.com>
	<37juh3F5d511mU1@individual.net>
	<Xns9600AE4FC946duncanrcpcouk@127.0.0.1>
	<37m8n9F5dkf4kU1@individual.net>
Message-ID: <slrnd1c0fb.jkb.apardon@rcpc42.vub.ac.be>

Op 2005-02-18, Diez B. Roggisch schreef <deetsNOSPAM at web.de>:
>> This is badly wrong. John was correct.
>> 
>> Bound methods get created whenever you reference a method of an instance.
>> If you are calling the method then the bound method is destroyed as soon
>> as the call returns. You can have as many different bound methods created
>> from the same unbound method and the same instance as you want:
>
> That did escape me so far - interesting. Why is it that way? I'd expect that
> creating a bound method from the class and then storing it in the objects
> dictionary is what happens. 
>

No. What happens is that functions are descriptors. So if you
assign a function to a class attribute any access to this
attribute will call the __get__ method which will create a
bound method if the access was through an instance or an
unbound method if the access was through the class.

-- 
Antoon Pardon


From deetsNOSPAM at web.de  Fri Feb 25 11:11:36 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 25 Feb 2005 17:11:36 +0100
Subject: accessor/mutator functions
References: <1109315698.002207.245690@g14g2000cwa.googlegroups.com>
	<mailman.3040.1109321620.22381.python-list@python.org>
	<1109346895.024524.77080@g14g2000cwa.googlegroups.com>
Message-ID: <3890ugF5mi8arU1@individual.net>

> Because if so, does the term 'lazy evaluation' refer to the fact that
> instead of:

No, it is a common technical term. It means that a value is computed the
time it is requested for the first time.

Like this:

class Foo(object):

   def __init__(self):
       self.__bar = None

   def getBar(self):
       if self.__bar is None:
           self.__bar = some_lengthy_computation()
       return self.__bar


That you can make bar a property of Foo is unrelated to this. 

Another reason to use properties is if the value is always or at least
frequently a freshly computed one.


-- 
Regards,

Diez B. Roggisch


From ncoghlan at iinet.net.au  Sat Feb  5 03:02:08 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 05 Feb 2005 18:02:08 +1000
Subject: changing local namespace of a function
In-Reply-To: <cu1nml$5db$1@joe.rice.edu>
References: <cu0lru$8ik$1@joe.rice.edu>	<1107550212.114358.281200@z14g2000cwz.googlegroups.com>	<cu13vi$ji7$1@joe.rice.edu>	<1107582027.700961.156800@f14g2000cwb.googlegroups.com>	<cu1n1t$507$1@joe.rice.edu>
	<cu1nml$5db$1@joe.rice.edu>
Message-ID: <42047D80.30006@iinet.net.au>

Bo Peng wrote:
> By the way, will 'with statement', like the one in pascal and many other 
> languages, be a good addition to python? For example,
> 
> with d do:
>   z = x + y
> 
> would be equivalent to d['z']=d['x']+d['y'] or d.z = d.x + d.y in some 
> other cases.
> 
> This would absolutely be the *best* solution to my problem.
> 
> Bo

Guido van Rossum has stated that he wants Python to eventually have a 'with' 
statement of the form:

   with d:
    .z = .x + .y

(The leading '.' being required to avoid ambiguity in name lookups)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From jcribbs at twmi.rr.com  Sat Feb  5 12:33:47 2005
From: jcribbs at twmi.rr.com (Jamey Cribbs)
Date: Sat, 05 Feb 2005 12:33:47 -0500
Subject: An Ode To My Two Loves
Message-ID: <4205037B.2030007@twmi.rr.com>

At the risk of calling my manhood into question, I humbly submit the 
following little diddy (which is a blatant rip-off of a heart wrenching 
melody of the '70s by that international superstar, Mary Macgregor):

    To the tune of "Torn Between Two Lovers":

        Torn between two languages, both of which are awesome tools
        Lovin' both of you is breakin' all the rules
        Torn between two incredibly awesome scripting languages, I'm 
startin' to drool
        Using you both is breakin' all the rules


Is freedom of choice wonderful or a curse?  I do a lot of scripting at 
my day job.  Through the years, I've gone through what will probably 
seem a somewhat familiar progression of scripting languages.  Started 
out with Tcl, moved to Perl when I began to do some serious text 
munging, moved back to Tcl/Tk when I needed to do some gui stuff, jumped 
to Python as I began to learn object oriented programming, told Python I 
needed more space and moved in with Ruby when I needed to do more gui 
stuff and wanted to use FXRuby.

And that's where I stand now, Torn Between Two Scripting Languages.  
Python and Ruby are both so damn attractive that I can't commit to one 
of them.  I don't want to settle down into a monogamous programming 
relationship.  I mean, if you have Grace Kelly on one arm and Maureen 
O'Hara on the other (I'm old school), should you really have to give one 
of them up?

Why can't my boss understand this?  But no, he has to lecture me about 
the dangers of "foolin' around" with too many languages.  "Oh sure", he 
says, "you're having fun now juggling two beautiful languages in the 
air.  But how long can you keep living two lives?  Sooner or later you 
are going to slip up and make a mistake.  My god, man, what if you start 
leaving off the 'end' in your if statements?  What if you forget that 
indentation DOES matter?!  For the love of all that is sacred and holy, 
think of the programs!"

My boss was always a little melodramatic.

Anyway, I don't know why I'm typing this up.  I just finished a major 
update to KirbyBase and I think I'm a little punch drunk.  I have been 
spending a lot of time with Ruby lately and working on KirbyBase caused 
me to dive back into Python.  Why do these two languages have to be so 
freakin' good!  I know a lot of people see big differences in the 
languages, but I'm not one of them.  I don't think I am a smart enough 
programmer to understand or ever be bothered by some of the more subtle 
or deeper differences that some people have pointed out.  Ah, ignorance 
is bliss.

Well, as long as I can keep my boss from finding out that I am in this 
programming love triangle, I think I will probably stay happily enmeshed 
in my little soap opera.

Well, I think I will go now and listen to my Captain & Tenille 
records...why are you looking at me like that.  I'm a happily married 
man with four kids.  I like football and guns...really, I do!

Under the influence of some kind of strange force and will probably be 
embarrassed when he snaps out of it,

Jamey Cribbs


From grante at visi.com  Fri Feb 11 11:50:05 2005
From: grante at visi.com (Grant Edwards)
Date: 11 Feb 2005 16:50:05 GMT
Subject: Alternative to raw_input ?
References: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>
	<mailman.2400.1108139722.22381.python-list@python.org>
	<w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>
Message-ID: <420ce23d$0$21606$a1866201@visi.com>

On 2005-02-11, BOOGIEMAN <BOOGIEMANPN at YAHOO.COM> wrote:
> On Fri, 11 Feb 2005 16:35:19 +0000, Simon Brunning wrote:
>
>> Err, why?
>
> It looks to ugly this way. I want to press 
> any key without ENTER to continue

Like somebody already said: use the WConio module.  

Somebody already posted a link. 

I suggest you go look at it.

-- 
Grant Edwards                   grante             Yow!  ... the MYSTERIANS
                                  at               are in here with my
                               visi.com            CORDUROY SOAP DISH!!


From devries at idolstarastronomer.com  Mon Feb 28 11:48:44 2005
From: devries at idolstarastronomer.com (Christopher De Vries)
Date: Mon, 28 Feb 2005 11:48:44 -0500
Subject: bsddb for k, v in db.items(): do order the numbers ?
In-Reply-To: <1109608259.047662.256140@z14g2000cwz.googlegroups.com>
References: <1109608259.047662.256140@z14g2000cwz.googlegroups.com>
Message-ID: <20050228164843.GA7302@miyu.cjas.org>

On Mon, Feb 28, 2005 at 08:30:59AM -0800, martijn at gamecreators.nl wrote:
> WHen I use the code below and printing all the results i get this:
> ------
> 0 1 10
> 11 2 3
> 4 5 6
> 7 8 9
> ------
> But I want
> ------
> 0 1 2
> 3 4 5
> 6 7 8
> 9 10 11
> ------

If you want your key, value pairs in a certain order you have to sort them
yourself. Dictionaries and bsddb keys are unsorted.

Chris


From steven.bethard at gmail.com  Mon Feb  7 15:21:10 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 07 Feb 2005 13:21:10 -0700
Subject: "Collapsing" a list into a list of changes
In-Reply-To: <mailman.2105.1107807115.22381.python-list@python.org>
References: <dvOMd.33656$EG1.19314@lakeread04>	<mailman.2099.1107802768.22381.python-list@python.org>	<CdydnQBDEpwmXJrfRVn-1g@comcast.com>
	<mailman.2105.1107807115.22381.python-list@python.org>
Message-ID: <6sidnS8u8dgsUJrfRVn-2w@comcast.com>

Francis Girard wrote:
> Le lundi 7 F?vrier 2005 20:30, Steven Bethard a ?crit :
>>especially since I avoid lambda usage, and would have to write these as:
> 
> Why avoid "lambda" usage ? You find them too difficult to read (I mean in 
> general) ?

Yup, basically a readability thing.  I also tend to find that if I 
actually declare the function, I can often find a way to refactor things 
to make that function useful in more than one place.

Additionally, 'lambda' is on Guido's regrets list, so I'm avoiding it's 
use in case it gets yanked for Python 3.0.  I think most code can be 
written now without it, and in most cases code so written is clearer. 
Probably worth looking at is a thread I started that went through some 
stdlib uses of lambda and how they could be rewritten:

http://mail.python.org/pipermail/python-list/2004-December/257990.html

Many were rewritable with def statements, list comprehensions, the 
operator module functions, or unbound or bound methods.

Steve


From invalidemail at aerojockey.com  Thu Feb 10 20:16:14 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 10 Feb 2005 17:16:14 -0800
Subject: lambda and for that matter goto not forgetting sugar
References: <tFJOd.38794$68.10179@fe1.news.blueyonder.co.uk>
Message-ID: <1108084574.612356.31310@o13g2000cwo.googlegroups.com>

Philip Smith wrote:
> I've read with interest the continuing debate about 'lambda' and its
place
> in Python.
>
> Just to say that personally I think its an elegant and useful
construct for
> many types of programming task (particularly number theory/artificial

> intelligence/genetic algorithms)

Well, I've done genetic algorithms in Python, and my implementation
didn't use lambda (other possibly than the occasional and convenient
passing an anonymous function as an argument).  If nothing else, my
experience proves GA can be done without lambda.

Most algorithms can be tackled effectively and elegantly by different
programing paradigms.  When someone says, "lambda is useful for this,"
often the thruth is "lambda is useful for this _if you are using a
heavily functional style_."  Often, someone else could implement the
same algoithm just as effectively without it.  For example, me doing
genetic algorithms without it.

Which brings us to my point:

If you're looking for a language that supports a heavily functional
style, Python just isn't it.  The functional elements that are in
Python are not there to support heavily functional programming; they
are there to enhance and complement the procedural/iterative style.

Does lambda do that?  In my opinion, not much.  I never thought it was
crucial, and now that Python has added support more specific (i.e.,
more specifically useful for enhancing procedural code) functional
features, like generator expressions, lambda is less useful than ever.

I'd say it's dispensible and not worth the added complexity.


[snip]
> For that matter I would find implementing the classical algorithms
far
> easier if python had 'goto' (I'll wait for the guffaws to subside
before
> mentioning that no lesser guru than Donald Knuth writes his
algorithms that
> way - naturally so because it reflects what the machine does at the
base
> level).

I wonder if anyone can come up with a better argument than a certain
isolated retrospectively bad decision Knuth made?

I'm curous whether you have a use case for goto, in Python, that can't
be handled with try...finally or exception handling.  We already know
about "the break from multiple loops" one; it's not terribly common to
do that and you can handle it with an exception.

(Ok, I'm actually not curious, cause I'm pretty sure you don't.)


[snip]
> Competition:  Has anyone found anything you can't do in the language?

Mr. Turing is rolling in his grave....


-- 
CARL BANKS



From merkosh at hadiko.de  Mon Feb 21 17:18:39 2005
From: merkosh at hadiko.de (Uwe Mayer)
Date: Mon, 21 Feb 2005 23:18:39 +0100
Subject: high resolution time needed
Message-ID: <cvdmnv$jbe$1@news2.rz.uni-karlsruhe.de>

Hi,

I need a function returning a time value with a higher resolution that the
standard 1sec unix timestamp. I found the clock() function in the time
module, but that seems to return the same value (in the Python shell) each
time I call it (Debian Linux speaking here). 

Any ideas?

Thanks,
Uwe 


From oren at REMOVETHIS1.hishome.net  Mon Feb  7 14:10:50 2005
From: oren at REMOVETHIS1.hishome.net (Oren Tirosh)
Date: 7 Feb 2005 11:10:50 -0800
Subject: Word for a non-iterator iterable?
References: <36lu1cF516qtdU1@individual.net>
Message-ID: <cf052f0d.0502071110.4e9611e0@posting.google.com>

Leif K-Brooks <eurleif at ecritters.biz> wrote in message news:<36lu1cF516qtdU1 at individual.net>...
> Is there a word for an iterable object which isn't also an iterator, and 
> therefor can be iterated over multiple times without being exhausted? 
> "Sequence" is close, but a non-iterator iterable could technically 
> provide an __iter__ method without implementing the sequence protocol, 
> so it's not quite right.

"reiterable". I think I was the first to use this word on
comp.lang.python.

If you have code that requires this property might want to use this
function:

.def reiter(x):
.    i = iter(x)
.    if i is x:
.        raise TypeError, "Object is not re-iterable"
.    return i

example:

.for outer in x:
.    for inner in reiter(y):
.        do_something_with(outer, inner)

This will raise an exception when an iterator is used for y instead of
silently failing after the first time through the outer loop and
making it look like an empty container.

When iter() returns a new iterator object it is a good hint but not a
100% guarantee that the object is reiterable. For example, python 2.2
returned a new xreadlines object for iterating over a file but it
messed up the underlying file object's state so it still wasn't
reiterable. But when iter() returns the same object - well, that's a
sign that the object is definitely not reiterable.

   Oren


From steve at holdenweb.com  Mon Feb  7 17:51:08 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 07 Feb 2005 17:51:08 -0500
Subject: variable declaration
In-Reply-To: <MSGID_2=3A5025=2F3.131_4207fd24@fidonet.org>
References: <1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4207fd24@fidonet.org>
Message-ID: <UmSNd.104914$Jk5.59261@lakeread01>

Alexander Zatvornitskiy wrote:

> ?????? Alex!
> 
> 05 ??????? 2005 ? 17:00, Alex Martelli ? ????? ?????? ? All ?????:
>  >>  AM> The fact that in Python there are ONLY statements, NO
>  >>  AM> declarations,
>  >> What is "global"? Statement? Ok, I fill lack of "var" statement:)
>  AM> 'global' is an ugly wart,
> 
> Ok,
> ===
> def hi():
>   print "hello!"
> ===
> What is it? Statement or declaration? After interpreter see this lines, it add
> information about function "hi" and it's body to his memory. Look at this:
>   var S
> Interpreter see this line and add information about variable S to the memory. I
> don't find big difference.
> By the way keyword "def" is as bad as "var", from your point of view? :)
> 
If your colloquial English is good enough to understand the word 
"bollocks" then you might begin to realize how irritating your arguments 
are becoming.

If, as you suggest, def were a declaration, then it should either not be 
possible to write

     if __debug__:
         def func(x):
             print x, "is bollocks"

or, if it were possible, then func would have a code object bound to it 
whether or not __debug__ were true.

In point of fact this is perfectly legal Python, which results in no 
binding to the name func when __debug__ is false, precisely *because the 
def statement is executable* - and it is so by design.

>  AM> to all intents and purposes working "as if"
>  AM> it was a declaration.  If I had to vote about the one worst formal
>  AM> defect of Python, it would surely be 'global'.
> Second worsest - 'def'? :)
> 
The reason global is a wart can clearly be seen in the following example:

  >>> x = 3
  >>> def f(tf, v):
  ...   if tf:
  ...     global x
  ...   x = v
  ...
  >>> f(0, 5)
  >>> x
5
  >>>

This makes it apparent that the global statement is *not* executable, 
the only one in the language that is not.

[...]
> 
> But, I am friendly, even with my opponents. I think it is my good trait.
> 
You are, of course, entitled to your opinion, self-serving though it may 
be. A friendly idiot is still an idiot.

[...]

> But I still think declaration of variables is good idea. But with shorter
> syntax. May be, smth like this: ~S, or `S or .S, or S`, S~ , S. , and so on. Of
> course it must be optional feauture: use it if you want or don't use if you
> don't want.
> 
Why not make it even shorter by omitting it altogether. Oh, sorry, it 
can be as short as you want as long as it isn't actually zero length? 
This is insanity ...
> 
[...]
> 
> Don't be so ... I don't find the equivalent english word. Smth like: Take it
> more easy.
> 
Please don't insult the martellibot. He did, after all, write "Python in 
a Nutshell" and co-edited the "Python Cookbook", and he has established 
a reputation with his consistent long-term contribution to Python and 
this newsgroup. Instead, ask yourself why your remarks engender such a 
response from a pillar of the Python community. What are your credentials?

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From ods at strana.ru  Sat Feb 19 04:44:25 2005
From: ods at strana.ru (Denis S. Otkidach)
Date: Sat, 19 Feb 2005 12:44:25 +0300
Subject: re.compile and very specific searches
In-Reply-To: <cv5ba4$nvn$1@solaris.cc.vt.edu>
References: <cv5ba4$nvn$1@solaris.cc.vt.edu>
Message-ID: <20050219124425.37a7bb9c.ods@strana.ru>

On Fri, 18 Feb 2005 13:14:28 -0500
rbt <rbt at athop1.ath.vt.edu> wrote:

> Is it possible to use re.compile to exclude certain numbers? For 
> example, this will find IP addresses:
> 
> ip = re.compile('\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}')
> 
> But it will also find 999.999.999.999 (something which could not 
> possibly be an IPv4 address). Can re.compile be configured to filter 
> results like this out?

Try this one: 
re.compile(r'\b%s\b' % r'\.'.join(['(?:(?:2[0-4]|1\d|[1-9])?\d|25[0-5])']*4))

-- 
Denis S. Otkidach
http://www.python.ru/      [ru]


From mhartl at post.harvard.edu  Sun Feb 13 22:33:38 2005
From: mhartl at post.harvard.edu (Michael Hartl)
Date: 13 Feb 2005 19:33:38 -0800
Subject: Newbie help
References: <lvUPd.10137$pE1.923@bignews3.bellsouth.net>
Message-ID: <1108352018.381002.167260@o13g2000cwo.googlegroups.com>

You need to put the "You guessed it..." block inside a conditional (if
guess == number) so that it only executes if the guess is right.  (You
also need to break out of the loop in that case.)  As written, the "You
guessed it..." block executes the first time through the loop
regardless of the guess.  Also, if the initial guess is right, then the
while guess != number block never executes, and the message is never
displayed.

What you need is an infinite loop that breaks on a correct guess or
upon reaching the maximum number of tries.

Here's a corrected version:

# import random
#
# print "\tWelcome to 'Guess My Number'!"
# print "\nI'm thinking of a number between 1 and 100."
# print "You Only Have Five Guesses.\n"
#
# # set the initial values
# number = random.randrange(100) + 1
# guess = int(raw_input("Go Ahead and Take a guess: "))
# tries = 1
# max_tries = 5
#
# # guessing loop
# while True:
#     if guess == number:
#         # Guess is right!
#         print "You guessed it!  The number was", number
#         print "And it only took you", tries, "tries!\n"
#         break
#     elif tries == max_tries:
#         print "Sorry You Lose!!!!"
#         print "The Number was ", number
#         break
#     elif guess > number:
#         print "Guess Lower..."
#     elif guess < number:
#         print "Guess Higher..."
#     guess = int(raw_input("Take Another guess: "))
#     tries += 1
#
# raw_input("\n\nPress the enter key to exit.")

Michael

--
Michael D. Hartl, Ph.D.
Chief Technology Officer
http://quarksports.com/



From ncoghlan at iinet.net.au  Tue Feb  8 04:43:09 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Tue, 08 Feb 2005 19:43:09 +1000
Subject: empty classes as c structs?
In-Reply-To: <4ZGdnajh7-eFPZrfRVn-3A@comcast.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<7rSdne7BcbDeV57fRVn-jg@comcast.com>	<mailman.1963.1107594941.22381.python-list@python.org>	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>	<mailman.1973.1107618702.22381.python-list@python.org>	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>	<mailman.2006.1107658273.22381.python-list@python.org>	<BN-dnVwu0oFR8ZvfRVn-gQ@comcast.com>	<1grkz2q.16dobcz12zdvcnN%aleaxit@yahoo.com>	<mailman.2049.1107750700.22381.python-list@python.org>	<9rmdnVR1lr-LYJvfRVn-gg@comcast.com>	<mailman.2065.1107779702.22381.python-list@python.org>
	<4ZGdnajh7-eFPZrfRVn-3A@comcast.com>
Message-ID: <420889AD.7080908@iinet.net.au>

Steven Bethard wrote:
> I wonder if it would be worth adding a descriptor that gives a warning 
> for usage from instances, e.g.:

Thinking about it some more, I realised that a class method approach means that 
'type(self).method(self,...)' still works as a way to spell the call in a 
polymorphism friendly way.

And if we're going to have to spell the call that way *anyway*. . .

So maybe it does make sense to simply say that all non-magic Bunch/namespace 
operations are implemented as class methods (and most magic methods are 
effectively treated as class methods when it comes to looking them).

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From ilias at lazaridis.com  Sun Feb  6 00:39:04 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sun, 06 Feb 2005 07:39:04 +0200
Subject: [EVALUATION] - E01: The Java Failure - May Python Helps?
In-Reply-To: <mailman.1999.1107644058.22381.python-list@python.org>
References: <ctsjmg$75p$1@usenet.otenet.gr><pan.2005.02.03.19.10.39.349763@jerf.org>	<cu2m3q$km1$1@usenet.otenet.gr>
	<mailman.1999.1107644058.22381.python-list@python.org>
Message-ID: <cu4ahl$a0s$1@usenet.otenet.gr>

Terry Reedy wrote:
> "Ilias Lazaridis" <ilias at lazaridis.com> wrote in message 
> news:cu2m3q$km1$1 at usenet.otenet.gr...
> 
> If you ask too much that other people do your searching for you, answers 
> will dry up.  

I don't ask people to search for me.

I ask people for their specific knowledge about specific python language 
constructs.

This is a simple cooperation.

I've spend very much time to extract this specifi evaluation template:

http://lazaridis.com/case/stack/index.html#evaluation

Python community can 'fill' it quickly with the relevant technology (if 
it exists).

The evaluation result can serve as a fundamental part for a _practical_ 
showcase how Python beats Java.

> But here are a couple that you might not find on google 
> anyway, at least not easily.

thank you.

>>I want to add metadata to everything within my design (functions, data,
>>classes, ...), if possible with a standard way.
> 
> You can annotate, by adding attributes to, modules, functions, classes, and 
> class instances.  You can not directly do so with 'basic' types: numbers, 
> sequences, and dicts -- and some others.  You can, however, either extend 
> or wrap anything with your own classes to get something you can annotate 
> (but don't ask me for the details).

=> {annotation via attributes on modules, functions, classes and objects}

=> {not available with basic types (numbers, sequences, dicts, ...) }

=> {unconfirmed: possibility to extend/wrap basic types with own classes}

>>I want to generate things (code, txt, html etc.) out of my object-model,
>> whilst using with a flexible generator, if possible a standard one.
> 
> One standard way to generate text from objects is to use custom classes, 
> each with a custom __str__ method.
[...]
> Then 'print html_doc_instance' can print the html doc 
> corresponding to the object model.

I understand this procedure.

I would like to use a standard way, which uses the standard metadata 
[implicit/explicit defined].

Does such standard exist?

> Like others, I recommend you spend a day with Python if you wish to learn 
> more.

I am spending "a day" with it's community.

.

-- 
http://lazaridis.com


From steve at holdenweb.com  Sat Feb  5 12:02:16 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 05 Feb 2005 12:02:16 -0500
Subject: Trouble converting hex to decimal?
In-Reply-To: <mailman.1976.1107622141.22381.python-list@python.org>
References: <1107611491.18588.26.camel@dulcevida>
	<mailman.1976.1107622141.22381.python-list@python.org>
Message-ID: <L37Nd.103651$Jk5.99701@lakeread01>

Pedro Werneck wrote:

> Hi
> 
> The problem is that '\x00' is a escape sequence... 
> 
> Try something like this:
> 
> 
> 
>>>>x = '\x00'
>>>>int(repr(x)[3:-1], 16)
> 
> 0
> 
>>>>x = '\x15'
>>>>int(repr(x)[3:-1], 16)
> 
> 21
> 
> 
> 
> 
> On Sat, 05 Feb 2005 06:51:32 -0700
> Earl Eiland <eee at nmt.edu> wrote:
> 
> 
>>I'm trying to process the IP packet length field, as recorded by pcap
>>(Ethereal) and recovered using pcapy.  When I slice out those bytes, I
>>get a value that shows in '\x00' format, rather than '0x00'.  Neither
>>int() nor eval() are working.  How do I handle this?
>>
>>Earl Eiland
>>
Talk about making things difficult!

  >>> x = '\x00'
  >>> ord(x)
0
  >>> x = '\x15'
  >>> ord(x)
21
  >>>

regards
  Steve
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005                      http://www.pycon.org/
Steve Holden                           http://www.holdenweb.com/


From aleaxit at yahoo.com  Sat Feb  5 11:00:15 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 5 Feb 2005 17:00:15 +0100
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>
	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>
	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>
	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>
Message-ID: <1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>

Alexander Zatvornitskiy
<Alexander_Zatvornitskiy at p131.f3.n5025.z2.fidonet.org> wrote:
   ...
>  AM> The fact that in Python there are ONLY statements, NO declarations,
> ===
> def qq():
>  global z
>  z=5
> ===
> What is "global"? Statement? Ok, I fill lack of "var" statement:)

'global' is an ugly wart, to all intents and purposes working "as if" it
was a declaration.  If I had to vote about the one worst formal defect
of Python, it would surely be 'global'.

Fortunately, it's reasonably easy to avoid the ugliness, by avoiding
rebinding (within functions) global variables, which tend to be easy. 

What you keep demanding is a way to inject far worse ugliness, and in a
context in which the typical behavior of pointy-haired bosses will be to
make it unavoidable for many of the people who work with Python.  I am
strongly convinced that, if you had your wish, the total amount of
happiness in the world would be quite substantially diminished, and I
will do anything I can to stop it from happening.


>  >> Fine! Let interpreter never show us errors like division by zero,
>  >> syntax errors, and so on. If file not found, library don't need to
>  >> say it. Just skip it!!! Because every, even simple, test will find
>  >> such bugs. Once you have unit tests, the added value of <anything>
>  >> is tiny, and their cost remains.
>  AM> Another false assertion, and a particularly ill-considered one in ALL
>  AM> respects. Presence and absence of files, for example, is an
   ...
> Here, you take one detail and bravely fight with it. Just try to understand
> meaning of my sentence, in all. It will help:)

I tear ONE of your examples to pieces in gory detail, because it's not
worth doing the same over and over again to every single piece of crap
you filled that sentence with -- very similar detailed arguments show
how utterly inane the whole assertion is.

There IS no meaning to your (several) sentences above-quoted, that it
can help anybody to "try to undestand": it's simply an insanely bad
attempt at totally invalid parallels.

>  AM> In brief: you're not just wrong, you're so totally, incredibly,
>  AM> utterly and irredeemably wrong that it's not even funny.
> Hey, take it easy! Relax, reread that piece of text. It was written with smile
> on my lips. Here it is for your convenience:

Do yourself a favor: don't even _try_ to be funny in a language you have
so much trouble with.  Your communication in English is badly enough
impaired even without such lame attempts at humor: don't made bad things
even worse -- the result is NOT funny, anyway, just totally garbled.

I'm not a native English speaker, either, so I keep a careful watch on
this sort of thing, even though my English would appear to be a bit
better than yours.


> Again, skip small details and take a look on the problem "in general".
Here is,

There IS no ``problem "in general"'': Python does a pretty good job of
diagnosing as many errors as can be diagnosed ***without demanding
absurdities such as redundancy on the programmer's part***.  Period.

> again, the main idea:
> ========
> Or, maybe, we will ask interpreter to find and prevent as many errors as he
> can?

To show how absurd that would be: why not force every line of the
program to be written twice, then -- this would help diagnose typos,
because the interpreter could immediately mark as errors any case in
which the two copies aren't equal.  Heck, why stop at TWICE -- even MORE
errors will be caught if every line has to be written TEN times.  Or a
million.  Why not?  *AS MANY ERRORS AS [it] CAN* is an *ABSURD*
objective, if you don't qualify it with *WHILE AVOIDING ANY ENFORCED
REDUNDANCY* introduced solely for that purpose.

As soon as you see that such redundancy is a horror to avoid, you will
see that Python's design is essentially correct as it is.


> You wrote about "substantial cost" of var declarations. Yes, you are
> write. But think about the cost of lack of var declarations. Compare time
> that programmer will waste on search for the reason of bug caused by such
> typo, plus time what programmer will waste while remembering exact
> variable name.

I've been programming essentially full-time in Python for about three
years, plus a few more years before then when I used Python as much as I
could, even though my salary was mostly earned with C++, Visual Basic,
Java, perl, and so on.  My REAL LIFE EXPERIENCE programming in Python
temms me that the time I've "wasted on search" etc due to the lack of
variable declaration is ***FUNDAMENTALLY NOTHING AT ALL***.  Other
hundreds of thousands of man-hours of similar Python programming
experience on the part of hundreds of other programmers essentially
confirm these findings.

Your, what, TENS?, of man-hours spent programming in Python tell you
otherwise.  Fine, then *USE ANOTHER LANGUAGE* and be happy, and let US
be just as happy by continuing to use Python -- almost all languages do
things the way you want, so ***leave alone*** the few happy oases such
as Python and Ruby where programmers can happily avoid the idiotic
redundancy of variable declarations, and not even PHBs can impose
otherwise.


> Compare it with time for looking on message:
> ===
> Traceback (most recent call last):
>   File "<pyshell#16>", line 5, in -toplevel-
>     epselon
> NameError: name 'epselon' is not defined, in strict mode
> ===
> and fixing it, plus time on typing three letters (or less).

Like experience shows in all cases of such idiotic redundancies, the
real waste of time comes in the BAZILLION cases where your program WOULD
be just fine -- except you missed one redundancy, so you have to go and
put it in to make the gods of redundancy happy again.  That happens with
VASTLY higher frequency than the cases where the enforced redundancy
saves you a comparable amount of time by catching some error earlier.

Plus, the FALSE confidence coming from redundancy works against you by
kidding you into believing that a BAZILLION other typos can't still be
lurking in your code, just because you've eliminated one TINY subset of
such typos (typos in names of variables that happen to leave the mangled
names syntactically valid BUT different from any other variable) -- and
*ONLY* that tiny subset of such typos which happened on the left of a
plain '=' (since all others, happening on the RIGHT of an '=' or on the
left of an _augmented_ '=', were already caught), and ONLY regarding
barenames (such typos on any but the rightmost component of compound
names were already caught intrinsically, and catching those on the
rightmost component is trivially easier than introducing a {YECCCCHH}
'vars' as you so stubbornly insist)...

Basically you're focusing on maybe ONE IN A MILLION of the errors you
could make and want to pervert the whole foundation of Python, and
seriously hamper the productivity of hundreds of thousands of Python
programmers in every normal case!, to save maybe two minutes in such a
one-in-a-million case.

I consider this one of the worst ideas to have been proposed on this
newsgroup over the years, which _IS_ saying something.  Oh, you're not
the only one, for sure -- there must have been a dozen before you, at
least.  Fortunately, even though almost each and every one of them has
wasted more of everybody's time with such ideas, than even their
scare-tactics claim of ``wastes of time'' due to lack of declarations
could account for, Python is still intact.  A few of the stubborn lovers
of declarations tried doing without, and, to their astonishment, found
out that everybody else, with years of Python experience, was right, and
they, without ANY such experience, were wrong (just incredible, eh?!);
others have gone away to find their bliss in Perl, PHP, or whatever --
good riddance, and don't let the door slam behind you as you go, please.


Alex


From peter at engcorp.com  Mon Feb 14 09:10:28 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 14 Feb 2005 09:10:28 -0500
Subject: Alternative to raw_input ?
In-Reply-To: <mailman.2524.1108383882.22381.python-list@python.org>
References: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>	<mailman.2400.1108139722.22381.python-list@python.org>	<w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>
	<mailman.2524.1108383882.22381.python-list@python.org>
Message-ID: <kNWdnbMjTNZQLI3fRVn-qg@powergate.ca>

Simon Brunning wrote:
> On Fri, 11 Feb 2005 17:37:19 +0100, BOOGIEMAN <BOOGIEMANPN at yahoo.com> wrote:
> 
>>It looks to ugly this way. I want to press
>>any key without ENTER to continue
> 
> 
> You'll only got your users complaining that they haven't got an 'any' key...

That, of course, calls for this bit of abetting copyright
violation:

http://www.pusboil.com/anykey.wav

-Peter


From __peter__ at web.de  Fri Feb  4 15:04:15 2005
From: __peter__ at web.de (Peter Otten)
Date: Fri, 04 Feb 2005 21:04:15 +0100
Subject: returning True, False or None
References: <NN6dnUoe3OHkKJ7fRVn-2g@comcast.com>
Message-ID: <cu0kc5$prf$05$1@news.t-online.com>

Steven Bethard wrote:

> I have lists containing values that are all either True, False or None,
> e.g.:
> 
>      [True,  None,  None,  False]
>      [None,  False, False, None ]
>      [False, True,  True,  True ]
>      etc.
> 
> For a given list:
> * If all values are None, the function should return None.
> * If at least one value is True, the function should return True.
> * Otherwise, the function should return False.
> 
> Right now, my code looks like:
> 
>      if True in lst:
>          return True
>      elif False in lst:
>          return False
>      else:
>          return None
> 
> This has a light code smell for me though -- can anyone see a simpler
> way of writing this?

An attempt to short-circuit if possible:

def tristate(iterable):
    it = iter(iterable)
    for item in it:
        if item is not None:
            return item or True in it

Not as elegant as max(), but makes me wonder whether a max() that accepts an
additional upper_bound argument and returns upper_bound as soon as it
encounters a value >= upper_bound would be worth the effort.

Peter



From tundra at tundraware.com  Sun Feb  6 14:59:14 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 06 Feb 2005 14:59:14 EST
Subject: ANN: 'twander' 3.193 Released And Available
Message-ID: <lj9id2-hpp2.ln1@eskimo.tundraware.com>

'twander' Version 3.193 is now released and available for download at:

          http://www.tundraware.com/Software/twander

The last public release was 3.160.

Existing users are encouraged to upgrade to this release as it has
a number of bug fixes and several significant new features including:

   - It is now possible to "filter" which files even appear in the
     interface using an arbitrary (Python) regular expression.
     This is very handy in large directories with, say, thousands
     of files, when you only want to deal with some small subset of
     those files.

   - The configuration language now supports "Execution Variables" -
     aka "backtick" variables - for embedding calls to external
     programs into the configuration.

   - User prompting now supports default values.  You can set a
     user prompt and pre-load the most likely response to the question
     in the reply dialog.


Complete details of all fixes, changes, and new features can be found in
the WHATSNEW.txt file included in the distribution.

Users are strongly encouraged to join the twander-users mailing list as
described in the documentation.

A FreeBSD port has been submitted as well.



What Is 'twander'?
------------------

'twander' is a macro-programmable Filesystem Browser that runs on both
Unix-like systems as well as Win32 systems. It embraces the best ideas
of both similar GUI-driven programs (Konqueror, Windows Explorer) as
well as text-based interfaces (Midnight Commander, List, Sweep).


Or, If You Prefer The "Elevator Pitch"
--------------------------------------

'twander' is:

    - A better file browser for Unix and Win32. (Tested on FreeBSD, Linux, Win32.)
    - A way to make browsing the same on all the OSs you use.
    - A macro-programmable tool that lets *you* define the features.
    - A GUI navigation front-end for your shell.
    - A way to "can" workflows for your technically-challenged colleagues.
    - A way to free yourself from the shackles of the mouse.
    - A way to significantly speed up your day-to-day workflow.
    - A Python/Tkinter application - about 5000 lines of code/comments
    - A RCT (Really Cool Tool) that will have you addicted in a day or two

See the web page for more information, a screen shot, and the complete
documentation.


------------------------------------------------------------------------------
Tim Daneliuk
tundra at tundraware.com



















From stonis at hotmail.com  Thu Feb  3 07:55:13 2005
From: stonis at hotmail.com (Christian)
Date: Thu, 03 Feb 2005 13:55:13 +0100
Subject: Apache & Python 500 Error
In-Reply-To: <pan.2005.02.02.16.56.13.530859@jerf.org>
References: <36bkqfF4sjt0oU1@individual.net>
	<pan.2005.02.02.16.56.13.530859@jerf.org>
Message-ID: <36el9jF4oj223U1@individual.net>

Jeremy Bowers schrieb:

> But first, check your apache error log. Then you will know what your error
> is, too.

Thanks for help, here is my error log:

[Thu Feb  3 13:52:49 2005] [error] PythonHandler python: Traceback (most 
recent call last):
[Thu Feb  3 13:52:49 2005] [error] PythonHandler python:   File 
"/usr/lib/python2.3/site-packages/mod_python/apache.py", line 181, in 
Dispatch\n    module = import_module(module_name, _req)
[Thu Feb  3 13:52:49 2005] [error] PythonHandler python:   File 
"/usr/lib/python2.3/site-packages/mod_python/apache.py", line 335, in 
import_module\n    module = imp.load_module(mname, f, p, d)
[Thu Feb  3 13:52:49 2005] [error] PythonHandler python:   File 
"/var/www/python/python.py", line 1
[Thu Feb  3 13:52:49 2005] [error] PythonHandler python:     from 
mod_python import apache
[Thu Feb  3 13:52:49 2005] [error] PythonHandler python:     ^
[Thu Feb  3 13:52:49 2005] [error] PythonHandler python: SyntaxError: 
invalid syntax

----
My test script:
#!/usr/bin/python

print 'Content-Type: text/plain\r'
print '\r'
import os
print os.getcwd()

thanks to Fuzzyman for test script




From jelle.feringa at ezct.net  Fri Feb 25 09:03:33 2005
From: jelle.feringa at ezct.net (Jelle Feringa / EZCT Architecture & Design Research)
Date: Fri, 25 Feb 2005 15:03:33 +0100
Subject: genetic algorithms
Message-ID: <20050225135923.C1A401C0010E@mwinf0508.wanadoo.fr>

Could anyone recommend me a genetic algorithm package? So far I have found a
few, such as GAS, pyGP, Genetic, and of course scipy.ga

My problem is that most of the development of these packages seems to be
stalled, or that in scipy.ga's case, the module seems huge and somewhat
overly complicated. Could someone recommend me a module, which is still
being developed, somewhat more concurrent than the stuff I'm finding? Any
recommendations, since most of these modules seem to be more projects
developed in sake of grasping GA's rather than actually using these ;-)

Cheers,

Jelle.




From benn at cenix-bioscience.com  Wed Feb  2 05:14:18 2005
From: benn at cenix-bioscience.com (Neil Benn)
Date: Wed, 02 Feb 2005 11:14:18 +0100
Subject: Python Code Auditing Tool
In-Reply-To: <36bko9F4mft0dU1@individual.net>
References: <pan.2005.02.02.05.47.52.827795@flaminglunchbox.net>	<7xhdkvbjab.fsf@ruckus.brouhaha.com>	<pan.2005.02.02.06.14.14.516276@flaminglunchbox.net>
	<36bko9F4mft0dU1@individual.net>
Message-ID: <4200A7FA.6020409@cenix-bioscience.com>

Diez B. Roggisch wrote:

>>I suppose that I am willing to lessen my expectations from _all_ to most.
>>;-) Regarding your example I could also do:
>>
>><
>>    
>>
<snip>

>>There is AFAIK only one language that this can de accomplished - java, and
>>that's because of these checked exceptions of theirs. But checked
>>exceptions are considered harmful:
>>
>>http://www.gcek.net/ref/books/sw/ooad/tip/#_Toc41169682
>>
>>I totally agree with that - in java, I tend to throw SystemExceptions to rid
>>myself of endless try/catch clauses that obscure the real problem.
>>
>>    
>>
<snip>
Hello,

   I'm afraid that the only reliable way to gather what exceptions are 
raised is to read docs and/or come up with test cases.  This has been a 
bugbear of mine in Python as it's not common to find a nice :Exceptions: 
IOError <desc>, IllegalArgumentError <desc> type of description in the docs.

    However if you want an incomplete test, you could parse the code and 
check for raises and retrieve the class name of the exception - however 
this would be patchy at best.  Therefore it would sort of negate the 
point of doing the analysis in the first place.

          Even in Java you cannot find every exception that will be 
thrown, only 'checked' exceptions but this is a percentage of all the 
exceptions (BTW why do you throw SystemException - it's a CORBA 
exception!  OK, it's a runtime exception but why not just simply extend 
RuntimeException?).  Also, if someone ever puts - catch (Exception e){} 
in their code they deserve to be kneecapped, IMHO the fault is with 
sloppy coding not with the supplied tools.

    Unfortunately its docs and testing again, that's why we get paid (if 
you're doing a job) or not paid (if you're doing it for fun!).  Although 
one language which comes closer is Eiffel which has require and ensure 
clauses on every method (following Meyer's Programming by contract 
philosophy).

Cheers,

Neil

-- 

Neil Benn
Senior Automation Engineer
Cenix BioScience
BioInnovations Zentrum
Tatzberg 46
D-01307
Dresden
Germany

Tel : +49 (0)351 4173 154
e-mail : benn at cenix-bioscience.com
Cenix Website : http://www.cenix-bioscience.com



From dmarcusanu at yahoo.com  Tue Feb  1 22:28:52 2005
From: dmarcusanu at yahoo.com (Dana Marcusanu)
Date: Tue, 1 Feb 2005 19:28:52 -0800 (PST)
Subject: getting data from a port in use
Message-ID: <20050202032852.50457.qmail@web52904.mail.yahoo.com>

Yes. I want to write a very small web sniffer that gets data from a
specified port. I already looked at some of the existing ones on Internet,
but they are not in Python (I am trying to learn Python!) and they have a
lot more features that I want. Thanks for your suggestion. I will check
out pcap library.

Dana

On 2005-02-01, Dana Marcusanu <dmarcus... at yahoo.com> wrote:

> I am trying to use Python to get the data received at a specific port
(in
> use) on my computer.

What do you mean "in use"? You mean you want to evesdropt on
data that's being sent to an existing connection?  If so,
you'll need to use something like the pcap library.

> I already tried below code which seems to hang at the
> statement accepting connections. I don't know what else I can try. Any
> suggestions will be welcome.

> import socket, select, os

> PORT = 2005
> s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
> s.bind((socket.gethostname(), PORT))
> s.listen(1)
> work_socket, addr = s.accept()
> data = s.recv(1024)

No matter what you're trying to do, this isn't right.  Once the
connection has been accepted, you have to read data from the
socket returned by the accept() call.

> print data
> s.close()

-- 
Grant Edwards                   grante             Yow!  Actually, what
                                  at               I'd like is a little
toy
                               visi.com            spaceship!! 


		
__________________________________ 
Do you Yahoo!? 
Yahoo! Mail - 250MB free storage. Do more. Manage less. 
http://info.mail.yahoo.com/mail_250


From eurleif at ecritters.biz  Sun Feb  6 03:37:19 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sun, 06 Feb 2005 03:37:19 -0500
Subject: Multiple constructors
In-Reply-To: <36m1bbF53tekaU1@individual.net>
References: <6SjNd.38337$K7.21639@fe2.news.blueyonder.co.uk>
	<36m1bbF53tekaU1@individual.net>
Message-ID: <36m32kF50jbnpU1@individual.net>

Leif K-Brooks wrote:
>     @classmethod
>     def from_pair(self, rows, columns):
>         return Matrix([rows, columns]) # Or with the right argument

Er... I'm not sure why I named that argument "self", it should be "cls" 
if you don't want to  confuse anyone reading your code.


From mwm at mired.org  Sat Feb 12 22:40:50 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 12 Feb 2005 21:40:50 -0600
Subject: Kill GIL
References: <1107961698.225373.247440@l41g2000cwc.googlegroups.com>
	<1107964587.818199.223980@g14g2000cwa.googlegroups.com>
	<mailman.2254.1107966236.22381.python-list@python.org>
	<7xr7jlwieq.fsf@ruckus.brouhaha.com> <cum62t$3fb$1@panix2.panix.com>
	<mailman.2463.1108256227.22381.python-list@python.org>
Message-ID: <868y5t6sal.fsf@guru.mired.org>

Jack Diederich <jack at performancedrivers.com> writes:

> From reading this
> thread every couple months on c.l.py for the last few years it is my 
> opinion that the number of people who think threading is the only solution
> to their problem greatly outnumber the number of people who actually have 
> such a problem (like, nearly all of them).

Here here. I find that threading typically introduces worse problems
than it purports to solve.

     <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From steve at holdenweb.com  Fri Feb 25 12:26:57 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 25 Feb 2005 11:26:57 -0600
Subject: xhtml-print parser
In-Reply-To: <cvncj2$9rb$1@gemini.csx.cam.ac.uk>
References: <1109333074.548547.171090@f14g2000cwb.googlegroups.com>	<cvn6f6$pdv$1@gemini.csx.cam.ac.uk>	<mailman.3045.1109339038.22381.python-list@python.org>
	<cvncj2$9rb$1@gemini.csx.cam.ac.uk>
Message-ID: <421F5FE1.2030600@holdenweb.com>

Michael Hoffman wrote:

> Steve Holden wrote:
> 
>> Consider that the OP might want to pass the C parser output to a 
>> Python web-content generator, which would make a deal of sense.
> 
> 
> You're welcome to guess what the OP wants to do, but I'm not going to.
> If he or she asks a coherent question it will probably be answered.

I have no problem with that. Indeed I am often surprised that questions 
that I regard as too incoherent to be understood are frequently not only 
understood but also answered with patience and fortitude.

Given that you couldn't spare the time to try to intuit the purpose of 
the question, I was surprised you took the time to complain about its 
incoherence. It's usually (IMHO) much more productive to ignore c.l.py 
questions I don't have time for, and it's certainly more polite.

If more of us had ignored Iliardis Lazarus, or whatever his name was, 
he'd have gone away a lot quicker :-)

regards
  Steve



From martin at v.loewis.de  Sun Feb 20 08:48:22 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 20 Feb 2005 14:48:22 +0100
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cv9sdo$69n$3@usenet.otenet.gr>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr>
	<42185b05$0$15460$9b622d9e@news.freenet.de>
	<cv9sdo$69n$3@usenet.otenet.gr>
Message-ID: <42189527$0$6260$9b622d9e@news.freenet.de>

Ilias Lazaridis wrote:
> Should I take answers serious?

If not, why are you asking questions in the first place?

> Answer from people which do not respect coherence of writings?

Coherence of writings?

> Should a professional developer take python serious?

Yes.

> I mean, if the team does not manage at least the foundation of a 
> multi-target automated-build-process?

If the team *would* not manage at least the foundation of a
multi-target automated-build-process, a professional developer
*should* not take python serious.

However, since the team *does* manage at least the foundation of
a multi-target automated-build-process, a professional developer
*might* take python serious.

[a false premise can imply anything]

Regards,
Martin


From albaalu at gmail.com  Tue Feb 15 00:09:10 2005
From: albaalu at gmail.com (PD)
Date: 14 Feb 2005 21:09:10 -0800
Subject: wxPython OGL future
In-Reply-To: <aP-dnUwXT5aB7ozfRVn-ug@powergate.ca>
References: <1108428501.441786.154130@g14g2000cwa.googlegroups.com>
	<aP-dnUwXT5aB7ozfRVn-ug@powergate.ca>
Message-ID: <1108444150.566248.162690@c13g2000cwb.googlegroups.com>

Hi D H,

Thank you for the suggestions. I would be interested in Jython but I
had some rough runs with it and I think I would kind of want to stick
to wxWidgets since I think the GUI is kind of cleaner. Im trying to
avoid reinventing the wheel so pyxel is a too little of a framework for
me.

I looked at piccollo though, and that is very appealing to me. What has
your experience been with Jython? I personally had a bad run in with
jython when I tried to run some example code with Swing and got all
sorts of weird behaviour (this was in their demos by the way...) Have
you ever seen some serious projects written with jython that I could
look at maybe?

I greatly appreciate your help, Thank you
Pouya



From 40adeff9.6fec5ad3 at dpma.finances.gouv.fr  Tue Feb  8 10:11:39 2005
From: 40adeff9.6fec5ad3 at dpma.finances.gouv.fr (40adeff9.6fec5ad3 at dpma.finances.gouv.fr)
Date: Tue, 8 Feb 2005 16:11:39 +0100
Subject: Returned mail: Data format error
Message-ID: <IBLOV100.828@smtp2.alize>

This message was undeliverable due to the following reason(s):

Your message could not be delivered because the destination computer was
not reachable within the allowed queue period. The amount of time
a message is queued before it is returned depends on local configura-
tion parameters.

Most likely there is a network problem that prevented delivery, but
it is also possible that the computer is turned off, or does not
have a mail system running right now.

Your message could not be delivered within 5 days:
Mail server 187.234.232.62 is not responding.

The following recipients could not receive this message:
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Please reply to postmaster at python.org
if you feel this message to be in error.

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From removethis.kartic.krishnamurthy at gmail.com  Tue Feb  1 07:11:47 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Tue, 01 Feb 2005 12:11:47 GMT
Subject: Suggesion for an undergrad final year project in Python
In-Reply-To: <1107241918.722156.123590@c13g2000cwb.googlegroups.com>
References: <1107241918.722156.123590@c13g2000cwb.googlegroups.com>
Message-ID: <7mKLd.18577$MX2.6627@twister.nyroc.rr.com>

Sridhar said the following on 2/1/2005 2:11 AM:
> Hi,
> 
> I am doing my undergrade CS course.  I am in the final year, and would
> like to do my project involving Python.  Our instructors require the
> project to have novel ideas.  Can the c.l.p people shed light on this
> topic?
> 

You try and implement some CS concepts you have learnt using Python. For 
example, if you had a course on parsing and compiler design, try to 
implement a simple language in Python.

Or if you like Computer Graphics, see if you can implement things like 
Phong shading and things in that field. This may not be novel like your 
professors want. But you can make it novel by allowing the user to 
rotate the object and show how the shadow and shading get transformed.

Or if you are the networking types, come up with a peer-to-peer chat 
application with whitetboard capability, which I am sure will be fairly 
novel.

Look within for answers :-)

That way you will reinforce your theory and learn Python as well.

Thanks,
--Kartic


From newsgroups at jhrothjr.com  Tue Feb  8 11:25:31 2005
From: newsgroups at jhrothjr.com (John Roth)
Date: Tue, 8 Feb 2005 10:25:31 -0600
Subject: python code with indention
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
Message-ID: <110hq18fbebn0b1@news.supernews.com>


"Xah Lee" <xah at xahlee.org> wrote in message 
news:1107805151.265680.165380 at o13g2000cwo.googlegroups.com...
> is it possible to write python code without any indentation?
>
> Xah

Depends on what you mean by "python code."
If you mean using the full facilities of the language,
then the answer is clearly no - indentation is not
optional.

You can, of course, write a silly little inline script without
any control structures that will all line up at the left
margain. So what?

John Roth

> xah at xahlee.org
> http://xahlee.org/PageTwo_dir/more.html
> 



From ilias at lazaridis.com  Sun Feb 20 06:31:04 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sun, 20 Feb 2005 13:31:04 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <42185b05$0$15460$9b622d9e@news.freenet.de>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr>
	<42185b05$0$15460$9b622d9e@news.freenet.de>
Message-ID: <cv9sdo$69n$3@usenet.otenet.gr>

Martin v. L?wis wrote:
> Ilias Lazaridis wrote:
> 
>> Should a professional developer take python serious?
> 
> Yes.

Should I take answers serious?

Answer from people which do not respect coherence of writings?

"
Should a professional developer take python serious?

I mean, if the team does not manage at least the foundation of a 
multi-target automated-build-process?

[targets need not to be supported directly by the python team. They 
could be added/managed/maintained by community members]
"

.

-- 
http://lazaridis.com


From steven.bethard at gmail.com  Sun Feb  6 16:53:48 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 06 Feb 2005 14:53:48 -0700
Subject: loops -> list/generator comprehensions
In-Reply-To: <opsls8buf21js0xs@news.telkomsa.net>
References: <1107718117.221204.80410@l41g2000cwc.googlegroups.com>
	<opsls54qat1js0xs@news.telkomsa.net>
	<4qCdnXI11-vhGJvfRVn-vQ@comcast.com>
	<opsls8buf21js0xs@news.telkomsa.net>
Message-ID: <asSdncm4c9J1DJvfRVn-gw@comcast.com>

Caleb Hattingh wrote:
>> filenames = [os.path.join(dirpath, filename)
>               # This is cool
>               for dirpath, _, filenames in os.walk('.')
>               # This is getting tricky, whats the '_' for?

Nothing to do with the list comprehension really.  '_' is a commonly 
used variable name for an object that we don't care about.  If you look 
at the OP's original code, the line:

    [(x[0], x[2]) for x in os.walk(".")]

is the equivalent of:

    [dirpath, filenames for dirpath, dirnames, filenames in os.walk('.')]

I prefer to give names to the values produced by os.walk -- I think it 
makes the usage much clearer.  However, since I don't use 'dirnames', I 
use '_' to indicate this:

    [dirpath, filenames for dirpath, _, filenames in os.walk('.')]

Would

     filenames = [os.path.join(dirpath, filename)
                  for dirpath, dirnames, filenames in os.walk('.')
                  for filename in filenames]

have been clearer for you?  Then all you have to do is remember the 
order of the for-loop execution:

>               # Which thing  goes where again in a comprehension?
>               for filename in filenames]

As mentioned in my other post, the order is identical to that of 
for-loops, e.g.

     result = []
     for dirpath, _, filenames in os.walk('.'):
         for filename in filenames:
             result.append(os.path.join(dirpath, filename))

is basically equivalent to:

     [os.path.join(dirpath, filename)
      for dirpath, _, filenames in os.walk('.')
      for filename in filenames]

Does that help?

Steve


From removethis.kartic.krishnamurthy at gmail.com  Sun Feb 13 19:35:40 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Mon, 14 Feb 2005 00:35:40 GMT
Subject: win32 extension install hiccup
In-Reply-To: <cuoh3s$87u$1@lust.ihug.co.nz>
References: <cuoh3s$87u$1@lust.ihug.co.nz>
Message-ID: <wnSPd.8926$H05.7919@twister.nyroc.rr.com>

MM said the following on 2/13/2005 4:50 PM:
> Hi,
> 
> I downloaded the latest win32all build 202 and tried to install under 
> win2000 with Py2.4. Install complains about 'couldn't open py2.4 to run 
> script pywin32-preinstall.py'. I checked the directories and there was 
> no sign of this file (preinstall.py) so I presume this is why it bombed. 
> How do I fix this? Thanks, matthew.

Add the location of Python.exe to the Path (System 
Properties->Advanced->Environment Variables) and run your win32all 
install. It will work like a charm!


From sjmachin at lexicon.net  Fri Feb  4 15:25:46 2005
From: sjmachin at lexicon.net (John Machin)
Date: 4 Feb 2005 12:25:46 -0800
Subject: newbie: Syntax error
In-Reply-To: <TrPMd.13383$3W3.8066@bignews4.bellsouth.net>
References: <TrPMd.13383$3W3.8066@bignews4.bellsouth.net>
Message-ID: <1107548746.158431.213370@o13g2000cwo.googlegroups.com>

Chad Everett wrote:
> Hi Everyone,
>
> I am new to Python and programming in general.  I bought the book
"Python
> Programming for the Absolute Beginner" by michael Dawson.
>
> I have been working through it but am having trouble.
> I am trying to make a coin flip program and keep geting a Synax Error
> "invalid syntax".
>
> If anyone has a moment could you please look at it and tell me what I
am
> doing wrong.
>
> thanks for your time and patience.
>
> Chad
>
> # Coin Flip Program
> # This program flips a coin 100 times and tells the number of heads
and
> tails.

Oh, no, it doesn't! Once you fix the few things that stop it from
running at all, it will flip the coin ONCE and tell you the one
then-fixed answer *99* times.

> # Chad Everett 2/3/2005
>
>
> print "\t\t********Coin Flip Game*********\n"
> import random
>
> # heads = 1
> # tails = 2
>
> tries = random.randrange(2) + 1

Better move the above line _after_ the "while" statement.

> count = 1

Try 0; think about it this way: you are counting the number of times
something has happened, and you want to stop after 100 somethings have
happened. At this stage you ain't hatched no chickens :)

>
You also need to initialise the 'heads' and 'tails' counters.

> while count != 100:

Defensive programming hint #1: while count <= 100, if starting at 1; <
100 if starting from 0

Tip: Python takes the drudgery out of programming. Less typing, less
scope for error. To do something 100 times:

!for count in range(100):
!    do_something()

>     if tries == 1:
>         heads = 1

I think you meant:
!heads += 1

>         count += 1
Do this in only one place; it doesn't/shouldn't depend on the coin toss
result.

>
>     else tries == 2:  # I AM GETTING THE SYNTAX ERROR HERE
>         tails = 1

and
!tails += 1

>         count += 1
>

Others have answered your syntax error question; I'll just round off
with Defensive Programming hint #2:

Get into this habit early:

!if tries == 1:
!    blah_blah()
!elif tries == 2:
!    yadda_yadda()
!else:
!    raise Exception, "Can't happen :-) tries has unexpected value
(%r)" % tries

> print "heads: " + heads

Ugh; did you get that out of the book?

Try:
!print "heads:", heads

> print "tails: " + tails
> 
> raw_input("Press enter to quit")

HTH,
John



From wuwei23 at gmail.com  Thu Feb 10 08:29:02 2005
From: wuwei23 at gmail.com (alex23)
Date: 10 Feb 2005 05:29:02 -0800
Subject: A great Alan Kay quote
In-Reply-To: <mailman.2300.1108035055.22381.python-list@python.org>
References: <420a5c1e$0$21630$a1866201@visi.com>
	<XL6dnQ1rPechD5ffRVn-uw@powergate.ca>
	<mailman.2300.1108035055.22381.python-list@python.org>
Message-ID: <1108042142.261688.224130@f14g2000cwb.googlegroups.com>


jfj wrote:
> Bah. My impressions from the interview was "there are no good
> languages anymore. In my time we made great languages, but today
> they all suck. Perl for example...."

That was kind of what I took from it as well. Don't get me wrong, I've
a lot of respect for Kay's contributions...he just doesn't understand
that there's *more* to a language than it's adherence to his ideas of
'best'. His arguments are literally academic.

Decrying contemporary choices for their "pop" nature kinda sounds like
the ugly kid devaluing the importance of the school dance.

It just wasn't fit enough to survive, Alan. Let it go.

- alex23



From paddy3118 at netscape.net  Wed Feb 23 19:17:51 2005
From: paddy3118 at netscape.net (Paddy)
Date: 23 Feb 2005 16:17:51 -0800
Subject: On eval and its substitution of globals
References: <1108828170.372593.150790@g14g2000cwa.googlegroups.com>
	<1109136736.670038.236040@z14g2000cwz.googlegroups.com>
	<421c7423$1_1@newspeer2.tds.net>
	<1109187171.586056.216950@l41g2000cwc.googlegroups.com>
	<3847qgF5l61aqU1@individual.net>
Message-ID: <1109204271.132781.252070@o13g2000cwo.googlegroups.com>

Leif wrote:
" If globals were deeply substituted when using eval, the program would
presumably print "42\n24", which would be far from intuitive. If you
limit the deep substitution to functions in the same module, you're
creating a confusing special case.  "

I guess I need outside opinions on what should be normal. The
documentation does not mention the case of 'nested' function calls and
so the present action could be documented but  there is still the issue
of "should there be a 'deep'  globals substitution". I have such a
need, but this is the first time I have had to consider this whole
topic.
I do in fact have the case you mention. I am writing a module that will
manipulate functions of global variables where the functions are
defined in another module.
My module will evaluate those 'other module' functions supplying the
globals itself - which works fine, the problem comes when I create
derivative functions in my module that call the original 'other module'
functions, and then try and evaluate these derivatives supplying the
globals as before. The 'correct' action that I want is for the globals
I supply to eval to be used for all functions called by the code block
as well as for the code block itself.

- Pad.



From andrea_gavana at tin.it  Sun Feb 27 08:40:32 2005
From: andrea_gavana at tin.it (andrea_gavana at tin.it)
Date: Sun, 27 Feb 2005 14:40:32 +0100
Subject: Controlling Pc From Server?
Message-ID: <420006340000CC69@ims9c.cp.tin.it>

Hello Kartic & NG,

     Thank you for your prompt answer. In effect, I'm trying to work on
a NT network of 6 PC (plus the server). Sorry to not have been clearer.
Ideally, I'm trying to monitor the Internet activity of each client (PC)
on this network (but I'm not a boss trying to control my emplyees, I'm just
curious on it). I would like to know which PC is connected to Internet (by
starting something like a "timer" for every PC, and then periodically check
if a particular PC is connected or not). This should be done from the main
server. 
Did I make myself clear? Do you think it would be a huge task?

Sorry, it may be a very basic question, but thank you for your help.

Andrea.




From matt2 at roffs.com  Thu Feb 24 10:29:55 2005
From: matt2 at roffs.com (Matt Upton)
Date: Thu, 24 Feb 2005 10:29:55 -0500
Subject: Need some Python help
In-Reply-To: <BE435B8C.A7A%matt2@roffs.com>
Message-ID: <BE435D23.A7C%matt2@roffs.com>



Hello, I am new to Python and am trying to produce script to run batch
processes for ArcGIS 9.0 (ArcView).  I have upgraded to Phython 2.4 from 2.1
and am using the Pythonwin to try to code but am running into a problem.
Whenever I try to debug my program or run any code past the following code
it gets hung up and crashes, quits, no warning, and no messages.  HELP, what
is the problem, it is getting very frustrating.

>> import win32com.client
>> gp = win32com.client.Dispatch("esriGeoprocessing.GPDispatch.1")
>> gp.workspace = "c:/Program Files/ArcGIS/NASA"


It ALWAYS crashes and quits 30 sec or so after line 2 or 3 of the code
above????  I can't get Python to do anything in ArcGIS so far, none of the
tools can be called or used?

I am assuming there is some sort of path or link that is not working
properly between ArcGIS and Python?

Using the same coding in the IDLE Python environment results in the same
crashing results.

Oh yea, I am running everything on Windows XP.

Thank you.

Matthew Upton






From strombrg at dcs.nac.uci.edu  Sun Feb 27 22:43:30 2005
From: strombrg at dcs.nac.uci.edu (Dan Stromberg)
Date: Mon, 28 Feb 2005 03:43:30 GMT
Subject: psyco -and- python -O
Message-ID: <pan.2005.02.28.03.43.30.445139@dcs.nac.uci.edu>


Is it useful to combine psyco with python -O, or do they conflict?

Thanks!



From tundra at tundraware.com  Thu Feb 17 16:28:05 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 17 Feb 2005 16:28:05 EST
Subject: [ANN]: twander 3.195 Released And Available
Message-ID: <htefe2-pkj2.ln1@eskimo.tundraware.com>

'twander' Version 3.195 is now released and available for download at:

          http://www.tundraware.com/Software/twander

The last public release was 3.193.

This release fixes one very minor bug and implements a single new
feature:

     - It is now possible to hide "dotfiles" in the list of displayed
       files and directories.  This can be toggled from the keyboard.

Barring the discovery of significant bugs, this is expected to be the
last version of 'twander' released for some time. No further feature
enhancements are planned at this time (though suggestions and user
"wish-lists" are still encouraged).

Complete details of all fixes, changes, and new features can be found in
the WHATSNEW.txt file included in the distribution.

Users are strongly encouraged to join the twander-users mailing list as
described in the documentation.

A FreeBSD port has been submitted as well.



What Is 'twander'?
------------------

'twander' is a macro-programmable Filesystem Browser that runs on both
Unix-like systems as well as Win32 systems. It embraces the best ideas
of both similar GUI-driven programs (Konqueror, Windows Explorer) as
well as text-based interfaces (Midnight Commander, List, Sweep).


Or, If You Prefer The "Elevator Pitch"
--------------------------------------

'twander' is:

    - A better file browser for Unix and Win32. (Tested on FreeBSD, Linux, Win32.)
    - A way to make browsing the same on all the OSs you use.
    - A macro-programmable tool that lets *you* define the features.
    - A GUI navigation front-end for your shell.
    - A way to "can" workflows for your technically-challenged colleagues.
    - A way to free yourself from the shackles of the mouse.
    - A way to significantly speed up your day-to-day workflow.
    - A Python/Tkinter application - about 5000 lines of code/comments
    - A RCT (Really Cool Tool) that will have you addicted in a day or two

See the web page for more information, a screen shot, and the complete
documentation.


------------------------------------------------------------------------------
Tim Daneliuk
tundra at tundraware.com






From skip at pobox.com  Tue Feb 15 21:49:24 2005
From: skip at pobox.com (Skip Montanaro)
Date: Tue, 15 Feb 2005 20:49:24 -0600
Subject: hard_decoding
In-Reply-To: <pan.2005.02.16.02.19.47.406754@dalkescientific.com>
References: <420AA934.6050206@mayo.edu>
	<mailman.2349.1108074761.22381.python-list@python.org>
	<pan.2005.02.16.02.19.47.406754@dalkescientific.com>
Message-ID: <16914.46260.672417.600927@montanaro.dyndns.org>


    Andrew> for another variation see that "Unicode Hammer" at
    Andrew>   http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/251871

    Andrew> It doesn't do the registry hooks that Skip does, and I see I
    Andrew> need to learn more about the functions in the codes module.

Note that latscii.py didn't implement the registry hooks until a user
pointed them out to me a couple weeks ago.  Other than that I really haven't
learned anything about them either.  ;-)

Skip


From michele.simionato at gmail.com  Fri Feb 11 02:35:57 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 10 Feb 2005 23:35:57 -0800
Subject: implementing singleton class at the module level
In-Reply-To: <mailman.2310.1108043164.22381.python-list@python.org>
References: <mailman.2310.1108043164.22381.python-list@python.org>
Message-ID: <1108107357.635949.289260@l41g2000cwc.googlegroups.com>

A Singleton class is there to be inherited from; a singleton instance
like the one you define is pretty much useless (unless I misunderstand
your intentions).

              Michele Simionato



From mahs at telcopartners.com  Tue Feb  8 17:00:25 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Tue, 08 Feb 2005 14:00:25 -0800
Subject: A ListComp that maintains its own state  (Was: Re: turing machine
 in an LC)
In-Reply-To: <s9z8y5yq1fp.fsf@salmakis.intevation.de>
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>	<87mzuf9gu8.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>	<s9zvf93ovp8.fsf@salmakis.intevation.de>	<pan.2005.02.08.12.47.00.135408@jerf.org>
	<s9z8y5yq1fp.fsf@salmakis.intevation.de>
Message-ID: <cubcn2$l8s$1@sea.gmane.org>


> Jeremy Bowers <jerf at jerf.org> writes:
> 
> 
>>On Tue, 08 Feb 2005 17:36:19 +0100, Bernhard Herzog wrote:
>>
>>>Nick Vargish <nav+posts at bandersnatch.org> writes:
>>>
>>>>"Xah Lee" <xah at xahlee.org> writes:
>>>>
>>>>>is it possible to write python code without any indentation?
>>>>
>>>>Not if Turing-completeness is something you desire.
>>>
Bernhard Herzog wrote:
....
a Turing Machine in one line plus assignments - nice!  Turns out that pypy is more
verbose than strictly necessary ;-)
...


BTW, I realized that it is indeed possible for a LC to maintain its own state 
without being passed an external mutable.  The trick is to use itertools.repeat 
to return the same mutable object on each iteration.

So, here's factorial in one line:
# state refers to list of state history - it is initialized to [1]
# on any iteration, the previous state is in state[-1]
# the expression also uses the trick of list.append() => None
# to both update the state, and return the last state

 >>> [state.append(state[-1] * symbol) or state[-1]
...         for symbol, state in it.izip(range(1,10),it.repeat([1]))
...             ]
[1, 2, 6, 24, 120, 720, 5040, 40320, 362880]
 >>>

Now, who was claiming that 'reduce' was opaque?

Michael ;-)



From steven.bethard at gmail.com  Sat Feb 12 00:51:13 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 11 Feb 2005 22:51:13 -0700
Subject: namespaces module (a.k.a. bunch, struct, generic object, etc.)
 PEP
In-Reply-To: <mailman.2436.1108183031.22381.python-list@python.org>
References: <GaudndOHLML3M5bfRVn-vg@comcast.com>	<mailman.2383.1108124347.22381.python-list@python.org>	<LvSdnbe2vZhv2ZDfRVn-tQ@comcast.com>
	<mailman.2436.1108183031.22381.python-list@python.org>
Message-ID: <fcadnXgIes3QBJDfRVn-uA@comcast.com>

Nick Coghlan wrote:
> There *is* a problem with using __getattr__ though - any attribute in 
> the chained namespaces that is shadowed by a class attribute (like 
> 'update') will be picked up from the class, not from the chained 
> namespaces. So we do need to use __getattribute__ to change that lookup 
> order. However, given the amount of grief the default lookup behaviour 
> causes, I think the place to do that is in Namespace itself:
> 
>     class Namespace(object):
>         # otherwise unchanged
>         def __getattribute__(self, name):
>             """Namespaces do NOT default to looking in their class dict
>             for non-magic attributes
>             """
>             getattribute = super(Namespace, self).__getattribute__
>             try:
>                 return getattribute("__dict__")[name]
>             except KeyError:
>                 if name.startswith('__') and name.endswith('__'):
>                     # Employ the default lookup system for magic names
>                     return getattribute(name)
>                 else:
>                     # Skip the default lookup system for normal names
>                     if hasattr(self, "__getattr__"):
>                         return getattribute("__getattr__")(name)
>                     else:
>                         raise AttributeError(name)

Hmmm...  This does seem sensible.  And sidesteps the issue about 
suggesting that subclasses use Namespace.update instead of 
namespaceinstance.update -- the latter just won't work!  (This is a Good 
Thing, IMHO.)

> Anyway, it is probably worth digging into the descriptor machinery a bit 
> further in order to design a lookup scheme that is most appropriate for 
> namespaces, but the above example has convinced me that 
> object.__getattribute__ is NOT it :)

Yeah, I'm going to look into this a bit more too, but let me know if you 
have any more insights in this area.

Steve


From amartin at wpsnetwork.com  Wed Feb  9 10:55:02 2005
From: amartin at wpsnetwork.com (Aurelio Martin Massoni)
Date: Wed, 09 Feb 2005 16:55:02 +0100
Subject: cx_Oracle failed to load DLL  BUT versions correct
In-Reply-To: <3d06fae9.0502090731.7232b53d@posting.google.com>
References: <3d06fae9.0502090731.7232b53d@posting.google.com>
Message-ID: <36uq2pF572dpsU1@individual.net>



jmdeschamps wrote:

> Hello
> 
> Having cx_Oracle (an Oracle database connector for Python) used it
> here where I teach for the last couple of years, and finding it so
> easy to use (and install) I was taken aback when I got an error
> message telling me it could not load the DLL (complete message below)
> 
> Third, I've read (on activeState site) about someone else having this
> problem which seemed to be resolved by correctly installing the
> appropriate versions  of different software piece.
> 
> BUT no 1 : I works on my portable (that has the same configuration for
> OS, Python and cx)
> 
> BUT no 2:  The same configuration gets the error message from our
> classroom workstations -
> after multiple testing, (uninstalling everything, python, Oracle,
> cx_Oracle,etc) ,  cleaning the registry, re-installing from fresh
> binaries ( Oracle works (SQL+) ) , the error stays...
> 
> HELP - Any hints, helps, things to look for, whatnot,
> 
> Many thanks in advance,
> 
> Jean-Marc
> jmdeschamps at cvm.qc.ca
> Cegep du Vieux-Montreal
> 
> 
> CONFIGURATION
> windows XP professionnal, sp2 (firewall stopped)
> installation in administrator mode
> Oracle 10g
> Python 2.3.4
> pywin32-203.win32-py2.3.exe
> cx_Oracle-4.1-win32-10g-py23.exe
> 
> NOTE: all files seem in the right places (cx_Oracle.pyd in
> site-packages)
> 
> ERROR (taken from PythonWin interactive window)
> PythonWin 2.3.4 (#53, May 25 2004, 21:17:02) [MSC v.1200 32 bit
> (Intel)] on win32.
> Portions Copyright 1994-2004 Mark Hammond (mhammond at skippinet.com.au)
> -
> see 'Help/About PythonWin' for further copyright information.
> 
>>>>import cx_Oracle
> 
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> ImportError: DLL load failed: La proc?dure sp?cifi?e est introuvable.
> 

Have you installed any new Oracle software in this machine ? Or maybe, 
have you modified the PATH environment variable ?

This error usually means that your cx_Oracle.pyd module needs to load an 
Oracle DLL, but it doesn?t find it in the directories specified in the 
PATH variable, or it finds a DLL with the same name but different (and 
incompatible) version.

Hope this helps

    Aurelio


From sjm at sjmsoft.com  Sun Feb 13 10:15:10 2005
From: sjm at sjmsoft.com (sjm at sjmsoft.com)
Date: 13 Feb 2005 07:15:10 -0800
Subject: Considering python - have a few questions.
In-Reply-To: <eZAPd.21496$Ka6.148459@news1.mts.net>
References: <eZAPd.21496$Ka6.148459@news1.mts.net>
Message-ID: <1108307710.241156.172420@c13g2000cwb.googlegroups.com>

Heather Stovold wrote:

> I am a "retired" programmer, that started in the DOS world.  (Well, I
guess
> I started pre-DOS...).  I learned C++ (for DOS), and Pascal (for DOS)
when I
> was in school - and programmed for several years in Basic.  (Ok - it
wasn't
> my choice - but it was what I was hired to program in - and each
single-user
> license was around $7,000 - so who was I to argue!)   I later did
some stuff
> in Visual Basic, and did some OOP in it.
>
> HOWEVER - I have not programmed a single darned thing for over 5
years.
> And although I do remember how to program in general, I don't seem to
> remember Visual Basic that well...  so I'm looking around.  (After
all, If
> I'm going to have to relearn a language - might as well be worth
while!)

Heather, one of the beauties of Python is that it's rich enough for the
advanced programmer and yet simple enough for the beginner.  I came to
Python after many years as a professional programmer (assembly
languages, Fortran, COBOL, Symstream, PL/1, Natural, C, Perl, Prolog)
and took to Python immediately.  Yet, were my 11 year-old niece to tell
me she wanted to learn to program, I'd steer her toward Python.  You
fall between these two extremes and  I think Python would be an
excellent choice for you.

-- Steve J. Martin



From ajsiegel at optonline.com  Sun Feb 13 13:05:11 2005
From: ajsiegel at optonline.com (Arthur)
Date: Sun, 13 Feb 2005 13:05:11 -0500
Subject: A great Alan Kay quote
References: <420a5c1e$0$21630$a1866201@visi.com>
	<mailman.2332.1108063164.22381.python-list@python.org>
	<slrnd0q67t.52v.curty@einstein.electron.net>
	<mailman.2487.1108316884.22381.python-list@python.org>
Message-ID: <t25v01pe4j4o2ue2pc3fid2nsr7m8aj3cu@4ax.com>

On Sun, 13 Feb 2005 18:48:03 +0100, Francis Girard >
>My deepest apologies,
>
>Francis Girard

Sorry if I helped get you into this, Francis.

I have read and seen enough of Kay and his visions to find him as a
bug where *my* moon don't shine. When the appropriate opportunity
comes, I find it hard not to mention the fact. 

All for reasons I have gone into on other fourms, but won;t repeat
here.

His loyaliss are stongly loyal..

FWIW, my issues have nothing to do with Smalltalk.  They have to do
with Kay as a puiblic personage. He may, for all I know, be a
sweetheart, privately.  And this most recent interview is one of the
more reasonable  I have heard from him.  Perhaps he is touching down
in reality, more often.

But at  this point isn't it fair to consider that Kay has forked from
Smalltalk. I'd probably have more problems with him, not less, if I
were a committed Smalltalk guy.

Art    



From seejadee at gmail.com  Wed Feb  2 20:00:59 2005
From: seejadee at gmail.com (Marcos)
Date: 2 Feb 2005 17:00:59 -0800
Subject: managing multiple subprocesses
Message-ID: <1107389097.523471.208040@l41g2000cwc.googlegroups.com>

Hi guys,
I realise this question has been answered in one form or another many
times before but I can't quite find the solution I need. I am trying to
run multiple subprocesses from a python script and then wait until all
subprocesses have completed before continuing. The subprocesses run on
other machines ie this is a coarse grained parallel computation task.

So the commands I am using are:
for x in range(0, limit):
os.system("xgrid .... ./someprogram %d &" % x)

and then to check whether they are all finished I do a very crude:

joblist = commands.getoutput("xgrid .... -job list")
while joblist != "{jobArray = (); }":
time.sleep(1)
joblist = commands.getoutput("xgrid .... -job list")

Xgrid is a system for parallel computation on Mac OS X. It is quite
good, check it out at www.apple.com/acg/xgrid. But anyway the method I
am using above, while it works, it quite often hangs. I'd like to just
run all the subprocesses at once and then check within the script,
rather than an auxilliary, to see if everything has returned. The
output of the commands is not important as that gets redirected to
files outside the script. I have tried all sorts of popens / excevs /
os.systems / commands etc etc. I realise the subprocess module may have
what I need but I can't get python 2.4 on the Mac so I need a 2.3 based
solution. Any help is much appreciated. Cheers.



From eurleif at ecritters.biz  Sun Feb 13 05:34:58 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sun, 13 Feb 2005 05:34:58 -0500
Subject: [NooB] a Variable in multiple quotes...
In-Reply-To: <614c778e.0502130204.5824cddf@posting.google.com>
References: <614c778e.0502130204.5824cddf@posting.google.com>
Message-ID: <378onnF5aoj75U1@individual.net>

administrata wrote:
> Is it possible? 
> 
> I tried...
> 
> I = "John"
> print \
> """
> I used to love pizza"""
> 
> 
> Error occurs!!!

No error occurs; it prints "I used to love pizza", as would be expected.

Oh: from the subject line, I'm guessing that you want it to say "John 
used to love pizza" instead? In that case, try doing this:

I = "John"
print "%s used to love pizza" % I


From mahs at telcopartners.com  Thu Feb  3 19:51:56 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 03 Feb 2005 16:51:56 -0800
Subject: how to generate SQL SELECT pivot table string
In-Reply-To: <1107475373.064794.155030@l41g2000cwc.googlegroups.com>
References: <1107475373.064794.155030@l41g2000cwc.googlegroups.com>
Message-ID: <ctugu5$2kv$1@sea.gmane.org>

McBooCzech wrote:
> Hallo all,
> 
> I am trying to generate SQL SELECT command which will return pivot
> table. The number of column in the pivot table depends on the data
> stored in the database. It means I do not know in advance how many
> columns the pivot table will have.
> 
> For example I will test the database as following:
> SELECT DISTINCT T1.YEAR FROM T1
> 
> The SELECT command will return:
> 2002
> 2003
> 2004
> 2005
> 
> So I would like to construct following select:
> 
> select T1.WEEK,
> SUM (case T1.YEAR when '2002' then T1.PRICE else 0 END) Y_02,
> SUM (case T1.YEAR when '2003' then T1.PRICE else 0 END) Y_03,
> SUM (case T1.YEAR when '2004' then T1.PRICE else 0 END) Y_04,
> SUM (case T1.YEAR when '2005' then T1.PRICE else 0 END) Y_05
> from T1
> group by T1.week
> 
> which will return pivot table with 5 columns:
> WEEK, Y_02, Y_03, Y_04, Y_05,
> 
> but if the command "SELECT DISTINCT T1.YEAR FROM T1" returns:
> 2003
> 2004
> 
> I have to construct only following string:
> 
> select T1.WEEK,
> SUM (case T1.YEAR when '2003' then T1.PRICE else 0 END) Y_03,
> SUM (case T1.YEAR when '2004' then T1.PRICE else 0 END) Y_04,
> from T1
> group by T1.week
> 
> which will return pivot table with 3 columns:
> WEEK, Y_03, Y_04
> 
> Can anyone help and give me a hand or just direct me, how to write a
> code which will generate SELECT string depending on the data stored in
> the database as I described?
> 
> Thanks
> 
> Petr McBooCzech
> 
 >>> step1result = """2000
... 2001
... 2002
... 2003""".splitlines()
 >>> step1result
['2000', '2001', '2002', '2003']
 >>> step2query = "Prefix " + ",".join(["Case %s" % year for year in 
step1result]) + " Postfix"
 >>> step2query
'Prefix Case 2000,Case 2001,Case 2002,Case 2003 Postfix'


HTH
Michael



From philippe at philippecmartin.com  Mon Feb  7 17:14:35 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Mon, 07 Feb 2005 22:14:35 GMT
Subject: socket question
References: <mailman.2089.1107796309.22381.python-list@python.org>
	<36pm9uF53qlqdU1@individual.net>
	<pan.2005.02.07.17.48.10.131474@philippecmartin.com>
	<cu8mkr$gv6$2@news.freedom2surf.net>
Message-ID: <pan.2005.02.07.22.14.32.847561@philippecmartin.com>

Yes it was.

Regards,

Philippe



On Mon, 07 Feb 2005 21:30:28 +0000, Steve Horsley wrote:

> Philippe C. Martin wrote:
>> Thanks you! that did it.
>> 
> 
> That makes me wonder what socket.gethostname() was returning.
> It wasn't 'localhost', was it?
> 
> Steve



From eurleif at ecritters.biz  Sat Feb 26 16:43:54 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sat, 26 Feb 2005 16:43:54 -0500
Subject: function expression with 2 arguments
In-Reply-To: <1109453122.034646.290200@z14g2000cwz.googlegroups.com>
References: <1109419984.213993.49280@f14g2000cwb.googlegroups.com>
	<98ydnSp0COmeLr3fRVn-jQ@powergate.ca>
	<1109453122.034646.290200@z14g2000cwz.googlegroups.com>
Message-ID: <38c8ngF5n4qnfU1@individual.net>

Xah Lee wrote:
> lambda x, y: x + y
> 
> that's what i was looking for.
> 
> ... once i have a lambda expr, how to apply it to arguments?

http://python.org/doc/current/ref/calls.html


From jmeile at hotmail.com  Fri Feb  4 06:35:39 2005
From: jmeile at hotmail.com (Josef Meile)
Date: Fri, 04 Feb 2005 12:35:39 +0100
Subject: Python 2.4 binaries for accessing PostgreSQL from Windows?
In-Reply-To: <1107512690.503191.8820@g14g2000cwa.googlegroups.com>
References: <1107512690.503191.8820@g14g2000cwa.googlegroups.com>
Message-ID: <42035E0B.6060307@hotmail.com>

Hi Frank

> I tried the psycopg site, but it does not seem to have binaries at all.
> 
> Does anyone know if either of these will be available in binary form
> for Python 2.4 on Windows?
For psycopg, there is a site with binaries for windows:
http://www.stickpeople.com/projects/python/psycopg/

Regards,
Josef


From godoy at ieee.org  Mon Feb 28 06:20:11 2005
From: godoy at ieee.org (Jorge Godoy)
Date: 28 Feb 2005 08:20:11 -0300
Subject: closing tabs in wxpython
References: <1109564663.573537.246800@z14g2000cwz.googlegroups.com>
Message-ID: <87psyl0w44.fsf@jupiter.g2ctech>

"Raghul" <raghulj at gmail.com> writes:

>   Can anybody help in closing tabs in wxpython.Pls give me a sample
> program for explaining this.Thanx in advance

Check the demo.  It is there along with several other faciliies.


Be seeing you,
Godoy.


From peter at engcorp.com  Sat Feb 19 20:42:04 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 19 Feb 2005 20:42:04 -0500
Subject: Error when display socekt content
In-Reply-To: <1108860794.259189.11830@l41g2000cwc.googlegroups.com>
References: <1108860794.259189.11830@l41g2000cwc.googlegroups.com>
Message-ID: <6oKdncvWD837dorfRVn-1A@powergate.ca>

myzhang at gmail.com wrote:
> The displayed string looks like some wierd chars (unreadable to human
> being at all), when I tried to display the received message by socket.
> I read by this line:
>   body = self.io.blockingRead (int(header.getFieldCN
> ('Content-Length')))
>   print "socket content: " + body
> 
> I am new to python, could you tell me where I did wrong?

You didn't post enough information for anyone to help much, that's
what...

Most importantly, what did you *expect* the above to do?  For
all I can tell, you should have expected it to print
"socket content: " followed by some potentially unreadable
data, which is what you got...

Also, it will help if you describe what "self.io" is, what
"header.getFieldCN" is, and what kind of communications protocol
is involved in what you're doing.  And, if it's HTTP as it
appears it might be, perhaps explain why you aren't using
something simple like urllib2 to deal with it...

Mentioning what platform (versions of OS and Python) you
are using is always a good idea too.

Cutting and pasting the *actual* output, or something
that describes a little better what you actually got and
what you expected to get is also a good idea... give us
enough information to help you and you'll be helping yourself.

-Peter


From skip at pobox.com  Tue Feb  1 22:09:55 2005
From: skip at pobox.com (Skip Montanaro)
Date: Tue, 1 Feb 2005 21:09:55 -0600
Subject: Where are list methods documented?
In-Reply-To: <41ffba7d$0$15879$a1866201@visi.com>
References: <41ffba7d$0$15879$a1866201@visi.com>
Message-ID: <16896.17539.299517.40541@montanaro.dyndns.org>


    Grant> where are the methods of basic types documented?  

The other day I suggested the most valuable doc page to bookmark is the
global module index.  Here's a demonstration.  Start at:

    http://www.python.org/dev/doc/devel/modindex.html

Click "__builtin__", which takes you to

    http://www.python.org/dev/doc/devel/lib/module-builtin.html

Click the "2" in "See Chapter 2", which takes you to

    http://www.python.org/dev/doc/devel/lib/builtin.html#builtin

Scroll down to section 2.3.6 and choose your sequence poison.

I use the dev docs instead of the latest release docs because I generally
run from CVS on my system, however in this case it has the added advantage
that the link on the __builtin__ page is more useful.

Skip


    


From beliavsky at aol.com  Thu Feb 10 06:57:13 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 10 Feb 2005 03:57:13 -0800
Subject: Loop in list.
References: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
	<3e8ca5c805020813074e975a4d@mail.gmail.com>
	<mailman.2214.1107900378.22381.python-list@python.org>
	<1108003131.605166.309350@c13g2000cwb.googlegroups.com>
Message-ID: <1108036633.269008.194370@l41g2000cwc.googlegroups.com>

Jim wrote:
> Wow!  All I wanted to do was write the equivalence
> of the Fortran statement:  Real*4 matrix(n,n).

If you are doing numerical linear algebra in Python, you should use the
Numeric or Numarray modules. With Numeric, the equivalent is just

from Numeric import zeros
matrix = zeros([n,n],Float)



From jkjone2002 at att.net  Wed Feb 16 11:35:34 2005
From: jkjone2002 at att.net (john san)
Date: Wed, 16 Feb 2005 11:35:34 -0500
Subject: [newbie]How to install python under DOS and is there any
	Wxpython can be installed under dos?
References: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
	<1108557065.547230.254540@z14g2000cwz.googlegroups.com>
Message-ID: <b9-dnTQOwoYK647fRVn-2Q@rogers.com>


Just want to show "windows" under dos without MsWindows. Also find some
difficulty to simply install WxPython under directory(DOS) and then run,
which is very good thing if it is just like Java.
I want a simple solution for Python to install to DOS and then can have
"Windows" running.( to be used under mod-xbox which support only limited
python via using xboxmediacenter. (xbox using stripped NT OS).






"Harlin" <harlinseritt at yahoo.com> ????
news:1108557065.547230.254540 at z14g2000cwz.googlegroups.com...
> Any reason you're asking about wxPython for "DOS"? Just curious.
>




From domma at procoders.net  Sat Feb  5 14:25:49 2005
From: domma at procoders.net (Achim Domma (Procoders))
Date: Sat, 05 Feb 2005 20:25:49 +0100
Subject: access problem with DCOM server written in python
Message-ID: <cu36ji$l46$02$1@news.t-online.com>

Hi,

I have a problem with a DCOM server written in python. Here is my 
minimal test object:

class TestObject:
     _reg_clsid_ = "{ECDBB3BC-F0BF-4eef-87C0-D179A928DAB5}"
     _reg_progid_ = "DComTest.Object"
     _reg_desc_ = "DComTest.Object"
     _public_methods_ = ['testit']

     def __init__(self):
         pass

     def testit(self): pass

if __name__=='__main__':
     #   register object
     from win32com.server.register import UseCommandLine
     UseCommandLine(TestObject)

The object is registered on server S and on client C. The user U exists 
on both machines with the same password. Accessing 'normal' C++ COM 
objects from C on S works fine, which means the DCOM is working at all.

U is able to create the object localy, but accessing my test object via 
DCOM gives me an 'access denied'. I used dcomcnfg to grand U the right 
to start and access the object on S (same settings as for working C++ 
objects), but I still get 'access denied'.

The server was newly setup. The script was working on another setup, but 
I have no idea what might be the differnce.

BTW: Accessing the object with an admin account works just fine.

Any hint on how to solve, or at least debug, the problem?

regards,
Achim


From xah at xahlee.org  Sat Feb 26 07:13:04 2005
From: xah at xahlee.org (Xah Lee)
Date: 26 Feb 2005 04:13:04 -0800
Subject: function expression with 2 arguments
Message-ID: <1109419984.213993.49280@f14g2000cwb.googlegroups.com>

is there a way to write a expression of a function with more than 1
argument?

e.g., i want a expression that's equivalent to

def f(x,y)
  return x+y

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From steven.bethard at gmail.com  Tue Feb 22 14:35:51 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 22 Feb 2005 12:35:51 -0700
Subject: Problem with the sort() function
In-Reply-To: <1109081224.749636.263730@g14g2000cwa.googlegroups.com>
References: <64827323f7134aea810788b3ec6cf516@localhost.talkaboutprogramming.com>
	<mailman.2928.1109066131.22381.python-list@python.org>
	<7204a5f80386fadd1afa4bc2509be849@localhost.talkaboutprogramming.com>
	<iRz*tMSHq@news.chiark.greenend.org.uk>
	<1109081224.749636.263730@g14g2000cwa.googlegroups.com>
Message-ID: <O_mdnY6C_7gFFIbfRVn-ig@comcast.com>

Fuzzyman wrote:
> Iterators are available in python 2.2
> class enumerate:
>     def __init__(self, inlist):
>         self.inlist = inlist
>         self.index = 0
> 
>     def next(self):
>         if self.index >= len(self.inlist): raise StopIteration
>         thisone = self.inlist[self.index]
>         self.index += 1
>         return self.index-1, thisone
> 
>     def __iter__(self):
>         return self

A simpler version that works with any iterable (not just sequences):

py> class enumerate(object):
...     def __init__(self, iterable):
...         self._next = iter(iterable).next
...         self._index = -1
...     def __iter__(self):
...         return self
...     def next(self):
...         self._index += 1
...         return self._index, self._next()
...
py> enumerate('abcde')
<__main__.enumerate object at 0x011627F0>
py> list(enumerate('abcde'))
[(0, 'a'), (1, 'b'), (2, 'c'), (3, 'd'), (4, 'e')]

STeVe


From mf1987 at arcor.de  Fri Feb 25 14:40:38 2005
From: mf1987 at arcor.de (Markus Franz)
Date: 25 Feb 2005 11:40:38 -0800
Subject: Handle user abort inside of a CGI-script
Message-ID: <576fb15a.0502251140.41b64351@posting.google.com>

Hallo!


I use Python mostly for CGI (Apache). And now I habe a problem: How
can I handle the situation if a user clicks on "abort" in the browser?
It seems that a CGI-script is NOT stopped at this point. Is there any
signal send to the CGI-process if the user clicks on "abort"?
Thank you.


Best regards

Markus


From ncoghlan at iinet.net.au  Sat Feb 12 02:54:54 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 12 Feb 2005 17:54:54 +1000
Subject: namespaces module (a.k.a. bunch, struct, generic object, etc.)
 PEP
In-Reply-To: <fcadnXgIes3QBJDfRVn-uA@comcast.com>
References: <GaudndOHLML3M5bfRVn-vg@comcast.com>	<mailman.2383.1108124347.22381.python-list@python.org>	<LvSdnbe2vZhv2ZDfRVn-tQ@comcast.com>	<mailman.2436.1108183031.22381.python-list@python.org>
	<fcadnXgIes3QBJDfRVn-uA@comcast.com>
Message-ID: <420DB64E.9020000@iinet.net.au>

Steven Bethard wrote:
 > Hmmm...  This does seem sensible.  And sidesteps the issue about
 > suggesting that subclasses use Namespace.update instead of
 > namespaceinstance.update -- the latter just won't work!  (This is a Good
 > Thing, IMHO.)

Yeah, I thought so too. It also crystallised for me that the real problem was 
that we were trying to use the attribute namespace for something different from 
what it is usually used for, and so Python's normal lookup sequence was a 
hindrance rather than a help.

I guess Guido knew what he was doing when he provided the __getattribute__ hook ;)

One other point is that dealing correctly with meta-issues like this greatly 
boosts the benefits from having this module in the standard library. I would 
expect most of the 'roll-your-own' solutions that are out there deal badly with 
this issue. "Inherit from namespaces.Namespace" is a simpler instruction than 
"figure out how to write an appropriate __getattribute__ method".

>> Anyway, it is probably worth digging into the descriptor machinery a 
>> bit further in order to design a lookup scheme that is most 
>> appropriate for namespaces, but the above example has convinced me 
>> that object.__getattribute__ is NOT it :)
> 
> 
> Yeah, I'm going to look into this a bit more too, but let me know if you 
> have any more insights in this area.

My gut feel is that we want to get rid of all the decriptor behaviour for normal 
names, but keep it for special names. After all, if people actually wanted that 
machinery for normal attributes, they'd be using a normal class rather than a 
namespace.

I'm also interested in this because I'd like to let the 'Record' class (see 
below) be able to store anything in the defaults, including descriptors and have 
things 'just work'.

The __getattribute__ I posted comes close to handling that, but we need 
__setattr__ and __delattr__ as well in order to deal fully with the issue, since 
override descriptors like property() can affect those operations. Fortunately, 
they should be relatively trivial:

     # Module helper function
     def _isspecial(name):
         return name.startswith("__") and name.endswith("__")

     # And in Namespace
     def __getattribute__(self, name):
         """Namespaces only use __dict__ and __getattr__
         for non-magic attribute names.
         Class attributes and descriptors like property() are ignored
         """
         getattribute = super(Namespace, self).__getattribute__
         try:
             return getattribute("__dict__")[name]
         except KeyError:
             if _isspecial(name)
                 # Employ the default lookup system for magic names
                 return getattribute(name)
             else:
                 # Skip the default lookup system for normal names
                 if hasattr(self, "__getattr__"):
                     return getattribute("__getattr__")(name)
                 else:
                     raise AttributeError('%s instance has no attribute %s'
                                          % (type(self).__name__, name))

     def __setattr__(self, name, val):
         """Namespaces only use __dict__ for non-magic attribute names.
         Descriptors like property() are ignored"""
         if _isspecial(name):
             super(Namespace, self).__setattr__(name, val)
         else:
             self.__dict__[name] = val

     def __delattr__(self, name):
         """Namespaces only use __dict__ for non-magic attribute names.
         Descriptors like property() are ignored"""
         if _isspecial(name):
             super(Namespace, self).__delattr__(name)
         else:
             del self.__dict__[name]

In action:

Py> def get(self): print "Getting"
...
Py> def set(self, val): print "Setting"
...
Py> def delete(self): print "Deleting"
...
Py> prop = property(get, set, delete)
Py> class C(object):
...   x = prop
...
Py> c = C()
Py> c.x
Getting
Py> c.x = 1
Setting
Py> del c.x
Deleting
Py> class NS(namespaces.Namespace):
...   x = prop
...
Py> ns = NS()
Py> ns.x
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "namespaces.py", line 40, in __getattribute__
     raise AttributeError('%s instance has no attribute %s'
AttributeError: NS instance has no attribute x
Py> ns.x = 1
Py> del ns.x
Py> ns.__x__
Getting
Py> ns.__x__ = 1
Setting
Py> del ns.__x__
Deleting

I've attached my latest local version of namespaces.py (based on the recent PEP 
draft) which includes all of the above. Some other highlights are:

NamespaceView supports Namespace instances in the constructor

NamespaceChain inherits from NamespaceView (as per my last message about that)

LockedView is a new class that supports 'locking' a namespace, so you can only 
modify existing names, and cannot add or remove them

NamespaceChain and LockedView are the main reason I modified NamespaceView to 
directly support namespaces - so that subclassed could easily support using either.

Record inherits from LockedView and is designed to make it easy to define and 
create fully specified "data container" objects.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net
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From duncan.booth at invalid.invalid  Mon Feb 21 12:28:04 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 21 Feb 2005 17:28:04 GMT
Subject: python2.4 generator expression > python2.3 list expression
References: <0ioj11dsgqhatqc3d7ldeb35rta6d9fk69@4ax.com>
	<mailman.2896.1109004722.22381.python-list@python.org>
Message-ID: <Xns9604B1AD25B91duncanrcpcouk@127.0.0.1>

Bryan wrote:

>> is to reset the rightmost (less significant) '1' bit of a number (ie
>> change it to '0').
> 
> i tried c &= c - 1 but i'm not getting the least significant or
> rightmost bit reset to zero.  am i misunderstanding something?
> 
> >>> 2 & 1  # 2 = 0x10; reset right most would be 0x10
> 0
> >>> 10 & 9 # 10 = 0x1010; reset right most would be 0x1010
> 8

The difference between the original "reset the rightmost '1' bit", and your 
interpretation: "reset the rightmost bit" is the "'1'".

The rightmost bit that is set is reset. So 0x10 -> 0, and 0x1010 -> 0x1000.

If you want to extract the least significant set bit from a number 'x' you 
can use (x&-x):

>>> x = 0xab4
>>> while x:
	print hex(x&-x), hex(x)
	x ^= (x&-x)

	
0x4 0xab4
0x10 0xab0
0x20 0xaa0
0x80 0xa80
0x200 0xa00
0x800 0x800
>>> 

(but don't try this if x is negative: it works but never terminates).


From s_t_a_n_i at yahoo.com  Fri Feb  4 06:45:26 2005
From: s_t_a_n_i at yahoo.com (http://www.stani.be)
Date: 4 Feb 2005 03:45:26 -0800
Subject: IDLE history, Python IDE, and Interactive Python with Vim
References: <opsllommgvb1cml1@ashot>
Message-ID: <1107517526.620423.280600@g14g2000cwa.googlegroups.com>

I think SPE has exactly what you need. Next to the shell there is the
session, which has only the commands typed on the interactive prompt.

Stani

http://spe.pycs.net

Ashot wrote:
> This is sort of both Python and Vim related (which is why I've posted
to
> both newsgroups).
>
> Python related:
> ----------------------
> I have been frustrated for quite some time with a lack of a history
> command in IDLE (in fact with IDLE in general).  Often I'll develop
new
> code at the command line, testing each line as I go.  Currently I
have to
> copy and paste, removing outputs and the ">>>" at each line.
> Is it perhaps possible to make some kind of hack to do this (dump a
> command history)?
>
> Idle in general isn't that great IMO, so I was wondering also if
there are
> better alternatives out there?  What do people use mostly?  I've
tried
> something called pyCrust, but this too didn't have history and some
other
> things I was looking for.  On a more general note, although the
agility
> and simplicity of Python make programming tools like an IDE less
> necessary, it still seems that Python is lacking in this departement.
 The
> PyDev plug-in for Eclipse seems like good step in this direction,
although
> I haven't tried it yet.  Does anyone have any experience with this,
or
> perhaps can point me to other tools.
>
> Vim related:
> ----------------------
> Ideally, it would be nice to have a command mapped to a keystroke
that can
> append the last executed command to a file.  Even better would be a
system
> that would integrate the file editing and interactive command line
tool
> more seamlessly.  Something along the lines of a debugger + file
editor
> + command line utility, where file editor = vim.  I know that vim has
a
> utility for running python commands from its command prompt, but I
have
> had a hard time getting this to work in windows and haven't explored
it.
> Has anyone seen/tried a system along these lines, perhaps
incorporating
> the python debugger (pdb)?  I can see something that will run the
file you
> are editing in vim up to the cursor or a mark with a set_trace at the
line
> you are editing.
>
>
> Any info is appreciated, thanks.
>
> --
> Ashot Petrosian
> University of Texas at Austin, Computer Sciences



From fredrik at pythonware.com  Tue Feb  8 12:19:51 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 18:19:51 +0100
Subject: variable declaration
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org><1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com><MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org><1grifns.14san6f1b076mdN%aleaxit@yahoo.com><MSGID_2=3A5025=2F3.131_420506b1@fidonet.org><1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com><MSGID_2=3A5025=2F3.131_4207fd24@fidonet.org><UmSNd.104914$Jk5.59261@lakeread01><4208178F.40804@po-box.mcgill.ca><mailman.2137.1107832669.22381.python-list@python.org><1grnpna.dwvqwdn50ot0N%aleaxit@yahoo.com>
	<1107882860.783420.251410@c13g2000cwb.googlegroups.com>
Message-ID: <cuas8g$vf$1@sea.gmane.org>

"top" <alexandre.tp at gmail.com> wrote:

> That thing about syntax errors is news to me. I thought they were
> caught at runtime, since you can catch them as exceptions, as in:
>
> try: prijnt projnt
> except SyntaxError: print "See, it gets caught"
>
> If this happens at compile-time, I'd like to know how.

$ python sample.py
  File "sample.py", line 1
    try: prijnt projnt
                     ^
SyntaxError: invalid syntax

</F> 





From fredrik at pythonware.com  Thu Feb 17 08:24:09 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 17 Feb 2005 14:24:09 +0100
Subject: Stable GUI + wxPython memory leak
References: <c0e7fd79.0502160619.565eb40e@posting.google.com><1108564589.069982.71680@o13g2000cwo.googlegroups.com><1108569376.721830.67370@o13g2000cwo.googlegroups.com><1108596113.424102.255340@f14g2000cwb.googlegroups.com><RbCdnauwxveOaY7fRVn-qg@powergate.ca>
	<1108645981.989801.164890@f14g2000cwb.googlegroups.com>
Message-ID: <cv25oh$7ap$1@sea.gmane.org>

Viktor wrote:

> Doesn't free the memory. The memory stays occupied. OK, when I do the
> same thing again, no additional memory is occupied. He uses the same
> memory allocated first time, but why doesn't he free it and why memory
> isn't fread up even if I explicitly call

the memory is released, but it's still assigned to the process.  if, how and when it's
returned to the operating system depends on a lot of things, most of which are out-
side Python's control.

(fwiw, this is how dynamic memory management works on most platforms).

</F> 





From fredrik at pythonware.com  Mon Feb 14 11:54:29 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 17:54:29 +0100
Subject: nested lists as arrays
References: <b35e3308.0502140835.53d3d9b2@posting.google.com>
Message-ID: <cuqkv5$2ba$1@sea.gmane.org>

"naturalborncyborg" <benjamin.cordes at blawrc.de> wrote:

> Hi, I'm using nested lists as arrays and having some problems with
> that approach. In my puzzle class there is a swapelement method which
> doesn't work out.

what happens, and what do you expect?

> Any help and comments on the code will be appreciated.

is it elements[y][x] or elements[x][y]?  both variants seem to be used
in your code.

(fwiw, in this case, using a dictionary might be a lot easier.  store cells
as elements[x, y], use elements.get((x, y)) is None to check for empty
cells, use elements[x, y] = None or del elements[x, y] to empty a cell,
use elements = {} to clear all cells, etc).

</F> 





From pobrien at orbtech.com  Mon Feb 14 14:15:27 2005
From: pobrien at orbtech.com (Pat)
Date: 14 Feb 2005 11:15:27 -0800
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <5tSR28oZUPECFwnQ@objmedia.demon.co.uk>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<4210a434$0$23451$626a14ce@news.free.fr>
	<mailman.2539.1108397140.22381.python-list@python.org>
	<37c1cgF35vfuvU1@individual.net>
	<1108405269.472669.172070@o13g2000cwo.googlegroups.com>
	<5tSR28oZUPECFwnQ@objmedia.demon.co.uk>
Message-ID: <1108408527.104275.46780@l41g2000cwc.googlegroups.com>

Stephen,

I appreciate your responses.  Maybe "school bullies" was an
exaggeration on my part.  At the same time, I'm not sure it is good for
the Python community to expect everyone to roll up their sleeves and
hack at something to make it work.  (And I don't mean to imply that you
hold that opinion.  But far too many others *have* expressed that.)
It's a marketing issue as much as anything.  Why is Apple doing so
well?  They make everything simple.  Now the techies will argue that
they make some things too simple (like the iPod), but it's hard to deny
that simple things that work consistently without any fuss have a
broader appeal with the public at large.

I think the same applies to developers.  Not every programmer is
willing to go through a lot of pain and effort just to get something
simple to work.  I, for one, am willing to go through that pain to save
users of my product (who happen to be developers) from having to do the
same.  But I don't think any less of my users.  I'm as lazy as they
are.  I like simple things that work consistently without any fuss too.
 :-)

Patrick K. O'Brien
Orbtech    http://www.orbtech.com
Schevo     http://www.schevo.org
Pypersyst  http://www.pypersyst.org



From tzot at sil-tec.gr  Fri Feb  4 03:29:36 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Fri, 04 Feb 2005 10:29:36 +0200
Subject: IDLE history, Python IDE, and Interactive Python with Vim
References: <opsllommgvb1cml1@ashot>
Message-ID: <e2c601pok26hbgtavgp3lmqgdku017qled@4ax.com>

On Wed, 02 Feb 2005 20:45:48 -0600, rumours say that Ashot
<ashot at removethismolsoft.com> might have written:

>I have been frustrated for quite some time with a lack of a history  
>command in IDLE (in fact with IDLE in general).  Often I'll develop new  
>code at the command line, testing each line as I go.  Currently I have to  
>copy and paste, removing outputs and the ">>>" at each line.
>Is it perhaps possible to make some kind of hack to do this (dump a  
>command history)?

I am not quite sure if it's exactly what you need, but, apart from moving to
previous lines and pressing Enter, do you know about Alt-P and Alt-N?
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From bdesth.quelquechose at free.quelquepart.fr  Thu Feb 10 13:02:25 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 10 Feb 2005 19:02:25 +0100
Subject: goto, cls, wait  commands
In-Reply-To: <Xns95F9A4E32D0CBduncanrcpcouk@127.0.0.1>
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
	<Xns95F9A4E32D0CBduncanrcpcouk@127.0.0.1>
Message-ID: <420b9f4b$0$29241$626a14ce@news.free.fr>

Duncan Booth a ?crit :
> BOOGIEMAN wrote:
> 
(snip)
>>Secondly, how do I clear screen (cls) from text and other
>>content ?
> 
> That depends on your computer, and how you are running your program.
> One way which *might* work is:
> 
>    import os
>    os.system("cls")

*might* work... !-)
  bruno at bibi modulix $ cls
-bash: cls: command not found

Bad luck ! didn't work !-)

Bruno


From gargonx at gmail.com  Sat Feb 12 21:12:32 2005
From: gargonx at gmail.com (gargonx)
Date: 12 Feb 2005 18:12:32 -0800
Subject: help please
In-Reply-To: <TPKdnU2eEu9xPJPfRVn-vg@comcast.com>
References: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
	<TPKdnU2eEu9xPJPfRVn-vg@comcast.com>
Message-ID: <1108260752.791847.180060@l41g2000cwc.googlegroups.com>

This works much better, aside from the fact that it does'nt work for
the std dictionary. the letters used from here stay the same. that
dictionary looks like this:

std = {
    "A":"Z",
    "Z":"A",
    "B":"Y",
    "Y":"B",
    "C":"X",
    "X":"C",
    "E":"V",
    "V":"E",
    "H":"S",
    "S":"H",
    "M":"N",
    "N":"M"
    }

what could be causing this?

i did figure out that if you reverse the k,v you are able to get it but
that doesn't turn up the results i need

def proc(text):
     result = []
     for word in text:
         for k, v in replacements:
             word = word.replace(v,k) #here i reversed them
         result.append(word)
     return ''.join(result)



From andrea.gavana at agip.it  Mon Feb 28 10:45:46 2005
From: andrea.gavana at agip.it (andrea.gavana at agip.it)
Date: Mon, 28 Feb 2005 16:45:46 +0100
Subject: String Replace Problem...
Message-ID: <OF6EBB10F8.203C41FB-ONC1256FB6.0055EFC0-C1256FB6.00569680@eni.pri>

Hello NG,

      probably this is a basic question, but I'm going crazy... I am unable
to find an answer. Suppose that I have a file (that I called "Errors.txt")
which contains these lines:

MULTIPLY
  'PERMX'  @PERMX1  1 34  1  20  1 6     /
  'PERMX'  @PERMX2  1 34  21 41  1 6     /
  'PERMX'  @PERMX3  1 34  1  20  7 14    /
  'PERMX'  @PERMX4  1 34  21 41  7 14    /
  'PERMX'  @PERMX5  1 34  1  20 15 26    /
  'PERMX'  @PERMX6  1 34  21 41 15 26    /
  'PERMX'  @PERMX7  1 34  1  20 27 28    /
  'PERMX'  @PERMX8  1 34  21 41 27 28    /
  'PERMX'  @PERMX9  1 34  1  20 29 34    /
  'PERMX'  @PERMX10  1 34  21 41 29 34    /
  'PERMX'  @PERMX11  1 34  1  20 35 42    /
  'PERMX'  @PERMX12  1 34  21 41 35 42    /
  'PERMX'  @PERMX13  1 34  1  20 43 53    /
  'PERMX'  @PERMX14  1 34  21 41 43 53    /
  'PERMX'  @PERMX15  1 34  1  20 54 61    /
  'PERMX'  @PERMX16  1 34  21 41 54 61    /
/

I would like to replace all the occurrencies of the "keywords" (beginning
with the @ (AT) symbol) with some floating point value. As an example, this
is what I do:

#  --- CODE BEGIN

import re
import string

# Set Some Dummy Parameter Values
parametervalues = range(1, 17)

# Open And Read The File With Keywords
fid = open("Errors.txt","rt")
onread = fid.read()
fid.close()

# Find All Keywords Starting with @ (AT)
regex = re.compile("[\@]\w+", re.IGNORECASE)
keywords = regex.findall(onread)

counter = 0

# Try To Replace The With Floats
for keys in keywords:
    pars = parametervalues[counter]
    onread = string.replace(onread, keys, str(float(pars)))
    counter = counter + 1

# Write A New File With Replaced Values
fid = open("Errors_2.txt","wt")
fid.write(onread)
fid.close()

#  --- CODE END


Now, I you try to run this little script, you will see that for keywords
starting from "@PERMX10", the replaced values are WRONG. I don't know why,
Python replace only the "@PERMX1" leaving out the last char of the keyword
(that are 0, 1, 2, 3, 4, 5, 6 ). These values are left in the file and I
don't get the expected result.

Does anyone have an explanation? What am I doing wrong?

Thanks to you all for your help.

Andrea.

------------------------------------------------------------------------------------------------------------------------------------------
 Message for the recipient only, if received in error, please notify the
sender and read http://www.eni.it/disclaimer/




From c00lways at gmail.com  Mon Feb 14 12:36:20 2005
From: c00lways at gmail.com (James)
Date: Tue, 15 Feb 2005 01:36:20 +0800
Subject: thanks jean
Message-ID: <4210e18d$1_2@news.tm.net.my>

hi jean :)

thanks for your help :)
i'll try it :)
i missed your message... did a search in google and found your reply :)
thanks a lot :)

best regards,

James


From steve at sil-tec.gr  Fri Feb  4 19:07:18 2005
From: steve at sil-tec.gr (Steve TZOTZIOY Georgiou)
Date: Sat, 05 Feb 2005 02:07:18 +0200
Subject: [OT] PEP 8j, pythonista naming style
References: <1107385488.822768.317250@l41g2000cwc.googlegroups.com>	<1107388493.465599.140480@g14g2000cwa.googlegroups.com>	<3YSdnYVEmOCW8pzfRVn-sg@comcast.com>	<1107391350.933650.321440@z14g2000cwz.googlegroups.com>	<1107392092.290042.221600@c13g2000cwb.googlegroups.com>	<pqpMd.102688$Jk5.95091@lakeread01>	<nrWdnRM9Q6Gu_5_fRVn-jw@comcast.com>
	<%UtMd.102705$Jk5.39995@lakeread01>
	<mailman.1886.1107525410.22381.python-list@python.org>
Message-ID: <sk1801li7rl2o7ciec9pc1ng8a24aniu47@4ax.com>

On Fri, 04 Feb 2005 23:56:44 +1000, rumours say that Steve Coghlan
<scoghlan at iinet.net.au> might have written:

>A Steve wrote:
>> A Steve wrote:
>> 
>>> A Steve wrote:
>>>
>
>There we go, much clearer ;)

Indeed.  I recall some Dan Perl who was advised to change his name to a more
pythonic one, but now I see he misinterpreted the advice.

Am I assimilated or what?
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From km at mrna.tn.nic.in  Mon Feb 21 12:27:33 2005
From: km at mrna.tn.nic.in (km)
Date: Mon, 21 Feb 2005 22:57:33 +0530
Subject: Chart Director?
In-Reply-To: <cv6pfa$1dc$1@news4.zwoll1.ov.home.nl>
References: <1108739705.870161.36050@z14g2000cwz.googlegroups.com>
	<cv6pfa$1dc$1@news4.zwoll1.ov.home.nl>
Message-ID: <20050221172733.GA26867@mrna.tn.nic.in>

Hi all,
Chart Director is a good module to implement graphs using in python.
i have been using it since 6 months for scientific data visualisation.
great module !!!
regards,
KM
----------------------------------------------------------
On Sat, Feb 19, 2005 at 08:22:19AM +0100, Vincent Wehren wrote:
> kdahlhaus at yahoo.com wrote:
> >Does anyone here have experience with Chart Director
> >(http://www.advsofteng.com/index.html)?   I'm thinking about purchasing
> >it and looking for any feedback from the Python community.  Thanks
> >
> 
> Since ChartDirector is not exactly open source nor found its origin in a 
> Python setting, my uneducated guess is that it will mostly be companies 
> that use ChartDirector.
> 
> However, from that vantage-point, ChartDirector is well-documented, has 
> lots of examples, and is great value for the money; it's pretty straight 
> forward, it covers all Python versions from 1.52 - 2.4, and the license 
> generally encompasses all other language bindings, too (all being at 
> version 4.0 except for the C++ version which is currently still at 3.04).
> 
> Still, you should just try it for what you are planning to use it /for/ 
> and see if it meets /your/ specific needs.
> 
> --
> Vincent Wehren
> 
> 
> 
> 
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list




From joele at qalabs.com  Tue Feb  1 20:47:39 2005
From: joele at qalabs.com (Joel Eusebio)
Date: Tue, 1 Feb 2005 17:47:39 -0800
Subject: Newbie Question
Message-ID: <20050202014118.8F6451E4004@bag.python.org>


Hi Everybody,

I'm pretty new to Python and would like to ask a few questions. I have this
setup on a Fedora Core 3 box.

Python 2.3.4
wxPython-common-gtk-ansi-2.5.3.1-fc2_py2.3
mod_python-3.1.3-5
Apache/2.0.52

I have a test.py which looks like this:
from mod_python import apache
def handler(req):
       req.write("Hello World!")
       return apache.OK

Whenever I access test.py from my browser it says "The page cannot be found"
, I have the file on /var/www/html, what did I miss?

 Thanks in advance,
Joel



From fperez.net at gmail.com  Fri Feb  4 14:45:53 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Fri, 04 Feb 2005 12:45:53 -0700
Subject: exporting mesh from image data
References: <m3wttpwo49.fsf@peds-pc311.bsd.uchicago.edu>
	<ctv7ir$adq$1@sea.gmane.org>
	<m31xbwnx99.fsf@peds-pc311.bsd.uchicago.edu>
Message-ID: <cu0jc0$doj$1@sea.gmane.org>

John Hunter wrote:

>>>>>> "Fernando" == Fernando Perez <fperez.net at gmail.com> writes:
> 
>     Fernando> I hope you posted this on the VTK list with a CC to
>     Fernando> Prabhu as well...  The hopes of a positive reply there
>     Fernando> are, I suspect, a fair bit higher.  The scipy list would
>     Fernando> be a good idea, too.
> 
> Hey Fernando,
> 
> I did get some help from Prabu off list.  The suggestion was to use a
> vtkDelaunay3D to mesh the isosurface points into a volume, which
> returns an unstructured grid, and then iterate over this structure to
> get the volume, face, vertex and connectivity information out.  I've
> implemented this and we're in the process of testing it with some
> simple geometries.  If/when I get something tested and working, I'll
> post it.
> 
> Thanks for the links,
> JDH

I should have thought of that, obviously.  Watch out for edge problems with
Delaunay triangulations:

http://amath.colorado.edu/faculty/fperez/faults/

Cheers,

f



From titus at caltech.edu  Sun Feb 13 15:49:38 2005
From: titus at caltech.edu (Titus Brown)
Date: Sun, 13 Feb 2005 12:49:38 -0800
Subject: RFC 2965 cookies, cookielib, and mailman.
Message-ID: <20050213204938.GA29099@caltech.edu>

For the record, re

http://mail.python.org/pipermail/python-list/2004-December/257422.html

and

http://www.gossamer-threads.com/lists/python/python/380607

cheers,
--titus

----- Forwarded message from John J Lee <jjl at pobox.com> -----

X-Original-To: titus at caltech.edu
From: John J Lee <jjl at pobox.com>
To: Titus Brown <titus at caltech.edu>
Subject: Re: RFC 2965 cookies, cookielib, and mailman.
X-Spam-Status: No, hits=0.0 tagged_above=-100000.0 required=5.0 tests=
X-Spam-Level: 

If you don't mind, could you forward this reply to python-list at python.org
and wwwsearch-general at lists.sourceforge.net, for the record?

On Sun, 6 Feb 2005, Titus Brown wrote:
[...]
> -> > In any case, the way to make the cookielib example work for mailman is
> -> > like so:
> -> > 
> -> >      policy = cookielib.DefaultCookiePolicy(rfc2965=True)
> -> >      cj = cookielib.LWPCookieJar('cookies.lwp', policy=policy)
> -> 
> -> Hmm, cookielib should work if IE and Mozilla do, so that's a bug :(
> -> You shouldn't need to turn on 2965 handling.
> -> 
> -> Do you have a script that demonstrates the problem, so I can fix it?
> 
> Attached.  By the by, thanks for fixing that cookiejar bug back in
[...]
> In the attached code, just change the True/False setting of the rfc2965
> flag in the DefaultCookiePolicy and you'll see that in one case a
> cookie is correctly handled and in the other it is not.  You're welcome
> to try the same URL with browsers:
[...snip details...]

Thanks for the bug report, Titus.

Damn, I wish I'd seen this bug before 2.4.0 was released.

Workaround, as you illustrate above, is to switch on RFC 2965 handling.

Looking at it, the problem seems blindingly obvious: I'm treating what is
in fact an RFC 2109 (not 2965) cookie from MailMan as though it were a
2965 cookie instead of as a Netscape cookie (a deliberate choice).  This
didn't cause trouble in ClientCookie 0.4. when 2965 handling was on by
default.  Now that it's off by default in cookielib and ClientCookie 1.0,
though (because 2965, and 2109 also, pretty much, are simply unimplemented
in popular browsers: ie. Firefox and MSIE), it breaks apps like Mailman
that, naively or stubbornly, send version=1 cookies.  Real browsers treat
RFC 2109 cookies as Netscape cookies (which, ad-hoc as Netscape cookies
are, effectively include a few bits and pieces from the 2109 standard), so
this behaviour is just plain wrong.  The fix is easy, will upload a patch
to SF.

Bah.


John

----- End forwarded message -----


From olivier.ravard at novagrid.com  Mon Feb 28 10:43:45 2005
From: olivier.ravard at novagrid.com (Olivier Ravard)
Date: Mon, 28 Feb 2005 16:43:45 +0100
Subject: How to delete a module file
Message-ID: <1109605426.3673.45.camel@harry.univ-rennes1.fr>

Hi everybody,

My application enables the developpment of new C++
modules that are dynamically loaded in this 
application.

My problem is that (under Windows) I can't delete a 
module that have been already imported. I must  
exiting the application (which is not a good idea for 
a developpment environnment).
i.e. I can't delete "module.pyd" if I made "import
module" in the python interpreter.

Is there some technics to "unload" modules under python ? or is there a
technic to force removing a file even it is used by another
application ?

Remark : This problem does not exist under Linux.

Thanks for your answers and ideas.

Olivier






From timh at zute.net  Sat Feb  5 04:43:05 2005
From: timh at zute.net (Tim Hoffman)
Date: Sat, 05 Feb 2005 17:43:05 +0800
Subject: IDLE history, Python IDE, and Interactive Python with Vim
In-Reply-To: <opsllommgvb1cml1@ashot>
References: <opsllommgvb1cml1@ashot>
Message-ID: <4204952a@news.highway1.com.au>

Have a gander at Boa Constructor.

YOu can certainly go to a shell when debugging. (ie set breakpoint)
then the shell is attached to that context.

T

Ashot wrote:
> This is sort of both Python and Vim related (which is why I've posted 
> to  both newsgroups).
> 
> Python related:
> ----------------------
> I have been frustrated for quite some time with a lack of a history  
> command in IDLE (in fact with IDLE in general).  Often I'll develop new  
> code at the command line, testing each line as I go.  Currently I have 
> to  copy and paste, removing outputs and the ">>>" at each line.
> Is it perhaps possible to make some kind of hack to do this (dump a  
> command history)?
> 
> Idle in general isn't that great IMO, so I was wondering also if there 
> are  better alternatives out there?  What do people use mostly?  I've 
> tried  something called pyCrust, but this too didn't have history and 
> some other  things I was looking for.  On a more general note, although 
> the agility  and simplicity of Python make programming tools like an IDE 
> less  necessary, it still seems that Python is lacking in this 
> departement.  The  PyDev plug-in for Eclipse seems like good step in 
> this direction, although  I haven't tried it yet.  Does anyone have any 
> experience with this, or  perhaps can point me to other tools.
> 
> Vim related:
> ----------------------
> Ideally, it would be nice to have a command mapped to a keystroke that 
> can  append the last executed command to a file.  Even better would be a 
> system  that would integrate the file editing and interactive command 
> line tool  more seamlessly.  Something along the lines of a debugger + 
> file editor  + command line utility, where file editor = vim.  I know 
> that vim has a  utility for running python commands from its command 
> prompt, but I have  had a hard time getting this to work in windows and 
> haven't explored it.   Has anyone seen/tried a system along these lines, 
> perhaps incorporating  the python debugger (pdb)?  I can see something 
> that will run the file you  are editing in vim up to the cursor or a 
> mark with a set_trace at the line  you are editing.
> 
> 
> Any info is appreciated, thanks.
> 
> -- 
> Ashot Petrosian
> University of Texas at Austin, Computer Sciences


From ncoghlan at iinet.net.au  Sat Feb  5 00:52:28 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sat, 05 Feb 2005 15:52:28 +1000
Subject: Crashing Python interpreter! (windows XP, python2.3.4, 2.3.5rc1,
 2.4.0)
In-Reply-To: <7r0801pqto29eiusrcbko8ptf75dmkrhap@4ax.com>
References: <mailman.1810.1107433431.22381.python-list@python.org>	<1107475081.100242.242920@f14g2000cwb.googlegroups.com>
	<7r0801pqto29eiusrcbko8ptf75dmkrhap@4ax.com>
Message-ID: <42045F1C.2070604@iinet.net.au>

Christos TZOTZIOY Georgiou wrote:
> 5. XP really knows better than you and by default does not search in system
> folders.  I killed that oh-so-friendly search dog on day 2 of acquainting myself
> with Windows XP last September, so I can't readily say where is the setting if
> your dog is enabled, but if your dog is dead too, it's under Advanced Options:
> Search system folders.

You don't have to kill Fido to fix it. In fact, killing Fido is *not enough* to 
fix it. You actually need to switch to the 'Advanced' search option.

  Start->Search
  Change preferences
  Change files and folders search behaviour
  Advanced
  OK

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From greg at cosc.canterbury.ac.nz  Wed Feb  9 19:19:31 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Thu, 10 Feb 2005 13:19:31 +1300
Subject: Big development in the GUI realm
In-Reply-To: <e0ag011atnlt5b00klicjol93c7j8fe341@4ax.com>
References: <mailman.2135.1107829480.22381.python-list@python.org>
	<e0ag011atnlt5b00klicjol93c7j8fe341@4ax.com>
Message-ID: <36vnkuF55ps43U1@individual.net>

Luke Skywalker wrote:
> 
> OK, so according to Linus, the GPL allows a proprietary program to
> make calls to the kernel,

As I understand things, it's not the GPL which allows
this, it's Linus himself who allows it. If Linus
hadn't explicitly said that, the GPL might be interpreted
as disallowing it.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From skilchen at hotmail.ch  Thu Feb  3 01:15:31 2005
From: skilchen at hotmail.ch (Samuel Kilchenmann)
Date: Thu, 3 Feb 2005 07:15:31 +0100
Subject: Logging
References: <4200BF14.5010408@cenix-bioscience.com>
	<mailman.1750.1107345636.22381.python-list@python.org>
Message-ID: <36dtueF4q3m3gU1@individual.net>

"Neil Benn" <benn at cenix-bioscience.com> schrieb im Newsbeitrag 
news:mailman.1750.1107345636.22381.python-list at python.org...
> Neil Benn wrote:
>
>> Hello,
>>
>>          I'm running a test and having issues with logging, if I call 
>> logging.shutdown() and then want to start the logging going again 
>> then I get a problem as if I call shutdown, I can't get the root 
>> logger again, such as :
>>
>> .<snip>
>
> Previous code missed out a line :
>
> .>>> import logging
> .>>> objTestLogger = logging.getLogger()
> .>>> objTestLogger.setLevel(logging.INFO)
> .>>> objTestLogger.addHandler(logging.FileHandler('c:\\test.log'))
> .>>> objTestLogger.info("THIS IS A TEST")
> .>>> logging.shutdown()
> .>>> objTestLogger = logging.getLogger()
> .>>> objTestLogger.setLevel(logging.INFO)
> .>>> objTestLogger.addHandler(logging.FileHandler('c:\\test.log'))
> .>>> objTestLogger.info("THIS IS A TEST")
> .Traceback (most recent call last):
> . File "c:\program files\python23\lib\logging\__init__.py", line 679, 
> in emit
> .    self.stream.write("%s\n" % msg)
> .ValueError: I/O operation on closed file
> .>>>
>
logging.shutdown() doesn't clean up the dict of handlers at the module 
level and the list of handlers maintained and at the level of the 
manager of loggers. So after calling logging.getLogger() etc. for the 
second time, you still have the closed filehandle in the list of 
loghandlers. The new FileHandler with the open filehandle is appended to 
this list of handlers. Then when you call ...info("...") this call is 
dispatched to all handlers in the handlerlist, i.e. also to the one with 
the closed filehandle.
I don't know if this has to be considered a bug in the logging module or 
if your use case is simply not covered.
If you add something like
.>>> logging._handlers.clear()
.>>> logging.root.handlers = []
.>>> for l in logging.Logger.manager.loggerDict.values():
.>>>     l.handlers = []
after logging.shutdown() and before getting the new logger, your script 
will probably run without errors.

hth,
Samuel 



From ramen at lackingtalent.com  Thu Feb 17 16:14:54 2005
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Thu, 17 Feb 2005 14:14:54 -0700
Subject: How to wrap a class's methods?
In-Reply-To: <mailman.2778.1108674428.22381.python-list@python.org>
References: <4214f167$0$44618$a1866201@visi.com>	<lcSdnQIG9cWZZ4nfRVn-vw@comcast.com>	<4214fd15$0$44645$a1866201@visi.com>
	<mailman.2778.1108674428.22381.python-list@python.org>
Message-ID: <VP7Rd.6896$zs.1623@okepread04>

Michael Spencer wrote:
> Grant Edwards wrote:
>>
>> Thanks.  The stuff provided by the "new" module is what I was
>> missing.
>>
> No magic in the 'new' module - new.instancemethod is just a synonym for 
> the method type:
> 
>  >>> import new, types
>  >>> new.instancemethod is types.MethodType
> True

(Assuming you're using Python 2.3 or newer)


From mcfletch at rogers.com  Mon Feb 14 17:01:45 2005
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Mon, 14 Feb 2005 17:01:45 -0500
Subject: 64 bit Python
In-Reply-To: <pjh7e2-8a8.ln1@valpo.de>
References: <1cd7e2-qu7.ln1@valpo.de> <cur339$c5q$1@bagan.srce.hr>
	<pjh7e2-8a8.ln1@valpo.de>
Message-ID: <42111FC9.2070506@rogers.com>

Mathias Waack wrote:
...

>My python script allocates a bunch of strings each of 1024 characters
>and writes it in a cStringIO. And it fails after writing 512K of
>strings. Don't know how python restricts the heap size - but I'm
>fairly sure its not a restriction of the OS. 
>  
>
Does cStringIO require contiguous blocks of memory?  I'm wondering if 
maybe there's something going on where you just can't allocate more than 
a GB of contiguous space?  What happens if you just store the strings in 
a list (or use StringIO instead of cStringIO)?  I'd imagine there might 
be problems with creating an individual string of multiple GB as well, 
for the same reason.

Just an idea,
Mike

________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com
                              PyCon is coming...



From fredrik at pythonware.com  Mon Feb  7 14:59:45 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 7 Feb 2005 20:59:45 +0100
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com><mailman.2092.1107797420.22381.python-list@python.org><5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com><mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
Message-ID: <cu8h8k$md4$1@sea.gmane.org>

Luke Skywalker wrote:

> Considering the fact that the Qt DLL exist by themselves, that the
> version used is the one provided by Qt, and that the EXE uses a
> standard, open way to communicate with it, the above does seem to say
> this use would be valid.

    http://www.gnu.org/licenses/gpl-faq.html#MereAggregation

    "/.../ If modules are designed to run linked together in a shared address
    space, that almost surely means combining them into one program.

    By contrast, pipes, sockets and command-line arguments are
    communication mechanisms normally used between two separate
    programs. So when they are used for communication, the modules
    normally are separate programs. But if the semantics of the
    communication are intimate enough, exchanging complex internal
    data structures, that too could be a basis to consider the two parts
    as combined into a larger program."

</F> 





From me at privacy.net  Thu Feb 17 18:45:24 2005
From: me at privacy.net (Dan Sommers)
Date: 17 Feb 2005 18:45:24 -0500
Subject: Access to formatting controls from within __repr__ or __str__?
Message-ID: <m2braiwy23.fsf@unique.fully.qualified.domain.name.yeah.right>

Hi,

I have a class whose objects represent physical quantities including
uncertainties and units, and I would like more control over the way they
print.

I have a __str__ method which outputs the quantity and its uncertainty,
properly rounded (i.e. the uncertainty to one digit and the quantity to
the same precision as the uncertainty), followed by the units (mostly)
as they accumulated during whatever calculations led to the quantity's
current value.  Inside this method, I round the floating point values
appropriately and depend on '%s' to do the Right Thing with the floating
point numbers.

I have a __repr__ method that outputs the three parts in such a way that
eval( repr( v ) ) returns a quantity as equal to v as possible.

I would like to add some other options, e.g., an SI mode that prints the
numbers and units according to SI guidelines, and a LaTeX option that
prints something I can copy and paste into a LaTeX document that uses
the SIunits and/or SIstyle packages and/or my own related macros.

So my question is:  Is there a way to pass options "through" a format
string to the __str__ and __repr__ functions?  For example, can I define
my own alternate form for use with the '#' formatting character, so that
'%#s' generates output according to SI guidelines?

I know I can always write the formatting methods separately and call
them explicitly, but IMO that's not as clean as using the format control
codes.  A collection of "set output format" methods is possible, but
that solution makes me cringe.

Thank you,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>
Never play leapfrog with a unicorn.


From martin at v.loewis.de  Sun Feb 20 05:01:58 2005
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 20 Feb 2005 11:01:58 +0100
Subject: unicode encoding usablilty problem
In-Reply-To: <opsme4lcjo6yt6e7@news.cisco.com>
References: <opsmekm2ei6yt6e7@news.cisco.com>
	<42164d01$0$4676$9b622d9e@news.freenet.de>
	<opsme4lcjo6yt6e7@news.cisco.com>
Message-ID: <42186016.7030309@v.loewis.de>

aurora wrote:
> Lots of errors. Amount them are gzip (binary?!) and strftime??

For gzip, this is not surprising. It contains things like

   self.fileobj.write('\037\213')

which is not intended to denote characters.


> How about
> 
>   b'' - 8bit string; '' unicode string
> 
> and no automatic conversion.

This has been proposed before, see PEP 332. The problem is that
people often want byte strings to be mutable as well, so it is
still unclear whether it is better to make the b prefix denote
the current string type (so it would be currently redundant)
or a newly-created mutable string type (similar to array.array).

> Perhaps this can be activated by something  
> like the encoding declarations, so that transition can happen module by  
> module.

That could work for the literals - a __future__ import would be
most appropriate. For "no automatic conversion", this is very
difficult to implement on a per-module basis. The errors typically
don't occur in the module itself, but in some function called by
the module (e.g. a builtin method of the string type). So the
callee would have to know whether the caller has a future
import...

Regards,
Martin


From eppstein at ics.uci.edu  Thu Feb 10 18:35:56 2005
From: eppstein at ics.uci.edu (David Eppstein)
Date: Thu, 10 Feb 2005 15:35:56 -0800
Subject: [perl-python] combinatorics fun
References: <1108075884.250995.62520@g14g2000cwa.googlegroups.com>
Message-ID: <eppstein-3833FA.15355610022005@news.service.uci.edu>

In article <1108075884.250995.62520 at g14g2000cwa.googlegroups.com>,
 "Xah Lee" <xah at xahlee.org> wrote:

> combo(n) returns a collection with elements of pairs that is all
> possible combinations of 2 things from n. For example, combo(4)
> returns {'3,4' => ['3',4],'1,2' => [1,2],'1,3' => [1,3],'1,4' =>
> [1,4],'2,3' => ['2',3],'2,4' => ['2',4]}; Hash form is returned
> instead of array for this program.

def combo(n):
    return dict([('%d,%d'%(i,j),(i,j))
                 for j in range(n) for i in range(j)])

import pprint
pprint.pprint(combo(5))


output:

{'0,1': (0, 1),
 '0,2': (0, 2),
 '0,3': (0, 3),
 '0,4': (0, 4),
 '1,2': (1, 2),
 '1,3': (1, 3),
 '1,4': (1, 4),
 '2,3': (2, 3),
 '2,4': (2, 4),
 '3,4': (3, 4)}


Note I'm using 0-based indexing, use range(1,n+1) and range(1,j+1) 
instead if you really need it to be 1-based.

Also I'm using Python 2.3, I think in 2.4 you can take out the square 
brackets and it would still work.

-- 
David Eppstein
Computer Science Dept., Univ. of California, Irvine
http://www.ics.uci.edu/~eppstein/


From benji at benjiyork.com  Sun Feb 13 00:58:29 2005
From: benji at benjiyork.com (Benji York)
Date: Sun, 13 Feb 2005 00:58:29 -0500
Subject: Considering python - have a few questions.
In-Reply-To: <eZAPd.21496$Ka6.148459@news1.mts.net>
References: <eZAPd.21496$Ka6.148459@news1.mts.net>
Message-ID: <420EEC85.9040707@benjiyork.com>

Heather Stovold wrote:
> I need to make a GUI interface.

There are many to choose from.  I prefer wxPython (wxpython.org).  It is
portable, has native look-and-feel, comes with good documentation and an
excellent demo application.

> I would really love it to be able to also be able to be run on the
> internet

You can certainly do network IO with Python, and there are several 
add-ons that make it even easier: Pyro at pyro.sourceforge.net or the 
built-in XML-RPC client and server.

> btw - I have the database designed (and the program info database
> filled) in Access....

There have been several threads here about connecting to Access.

> I don't mind working hard to learn how to do it....   I just want to
> know if Python is a good choice or not!

I'd definitely say so.  Have fun!
--
Benji York
benji at benjiyork.com



From http  Fri Feb  4 02:10:35 2005
From: http (Paul Rubin)
Date: 03 Feb 2005 23:10:35 -0800
Subject: advice needed for simple python web app
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
	<ctv48p$75$1@eeyore.INS.cwru.edu>
	<N86dnZ7k56I3gJ7fRVn-tg@rogers.com>
Message-ID: <7xis58reac.fsf@ruckus.brouhaha.com>

"Dan Perl" <danperl at rogers.com> writes:
> This is exactly the kind of summary that I think should be in a
> WebProgrammingShootOut (see another one of my postings in this
> thread) but I failed to find such a summary.  Thanks, Brian!  Anyone
> can add to the list?

If you're just trying to get a conceptual understanding of web
programming, I suggest you start with cgi.

Next you might want to read Philip and Alex's Guide to Web Publishing:

  http://philip.greenspun.com/panda/

It's out of date and the examples use Tcl and Oracle instead of
Python, but it's still a good explanation of how database-driven web
sites work.  The rest (like languages frameworks) is just a matter of
picking some implementation parameters.


From jtp11 at att.net  Tue Feb  8 09:49:34 2005
From: jtp11 at att.net (Jim)
Date: 8 Feb 2005 06:49:34 -0800
Subject: Loop in list.
Message-ID: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>

Where did this type of structure come from:

mat = ['a' for i in range(3)]    ?

This will produce a list of three elements but
I don't see reference for it in any of the books.



From exogen at gmail.com  Fri Feb 18 21:50:28 2005
From: exogen at gmail.com (Brian Beck)
Date: Fri, 18 Feb 2005 21:50:28 -0500
Subject: [perl-python] exercise: partition a list by equivalence
In-Reply-To: <cv63sg$11k$1@eeyore.INS.cwru.edu>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<cv63sg$11k$1@eeyore.INS.cwru.edu>
Message-ID: <cv69n2$bvt$1@eeyore.INS.cwru.edu>

Well, it looks like David posted a good solution, but I haven't tested 
it (I'm assuming his works fine). I fixed mine up anyway... it actually 
works now. If you're not using 2.4 you'll have to import sets.Set as set.

def merge(pairList):
     pairList = set(tuple(sorted(p)) for p in pairList)
     # Sort & set to remove duplicates, tuple to make hashable
     merged = []
     removePairs = set([])

     # Each loop will result in a new, complete sublist in the result
     while pairList:
         if removePairs:
             removePairs = set([])
         else:
             subList = set(pairList.pop()) # Start a new sublist

         for pair in pairList:
             pairSet = set(pair)
             # True when pairSet and subList share at least one element
             if pairSet & subList:
                 subList |= pairSet # Merge pair with subList
                 removePairs.add(pair) # Mark pair for removal

         if removePairs:
             pairList -= removePairs
         else:
             merged.append(list(subList))

     return merged

--
Brian Beck
Adventurer of the First Order


From aahz at pythoncraft.com  Mon Feb 28 10:19:36 2005
From: aahz at pythoncraft.com (Aahz)
Date: 28 Feb 2005 10:19:36 -0500
Subject: Chinese curses,
	again (was Re: Why do descriptors (and thus properties) only work
	on attributes.)
References: <slrnd25nve.d87.apardon@rcpc42.vub.ac.be>
	<7xoee5kpiv.fsf@ruckus.brouhaha.com>
	<slrnd25pj4.d87.apardon@rcpc42.vub.ac.be>
	<cvuqhc$e02$1@news.sap-ag.de>
Message-ID: <cvvcq8$mtp$1@panix1.panix.com>

In article <cvuqhc$e02$1 at news.sap-ag.de>,
Daniel Dittmar  <daniel.dittmar at sap.corp> wrote:
>
>As in the chinese curse "May you live in interisting times"?

Not so Chinese:

http://www.noblenet.org/reference/inter.htm
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"The joy of coding Python should be in seeing short, concise, readable
classes that express a lot of action in a small amount of clear code -- 
not in reams of trivial code that bores the reader to death."  --GvR


From skip at pobox.com  Wed Feb  2 11:13:18 2005
From: skip at pobox.com (System Administrator)
Date: Wed, 2 Feb 2005 10:13:18 -0600
Subject: Next step after pychecker
In-Reply-To: <200502021053.55502.francis.girard@free.fr>
References: <41ff0308$0$6503$636a15ce@news.free.fr>
	<mailman.1726.1107313882.22381.python-list@python.org>
	<42009d13$0$24304$636a15ce@news.free.fr>
	<200502021053.55502.francis.girard@free.fr>
Message-ID: <16896.64542.24147.304219@montanaro.dyndns.org>


    Francis> But Skip, I am sure that you can easily find an example by
    Francis> yourself. For example, replace "+" by a function that does
    Francis> different things depending on its argument type.

Sure.  I was thinking of the optimization use of type inferencing,
forgetting the subject of the note.

Coming back to this:

    1- if a is None:
    2-   b = 1
    3- else:
    4-   b = "Phew"
    5- b = b + 1

pychecker should be able to warn you today (but it doesn't) that you are
using b to refer to objects of two different types.  It's not type
inferencing, but it would probably be a reasonable addition to its suite of
things it checks.

Skip


From levub137 at wi.rr.com  Sat Feb 19 08:07:06 2005
From: levub137 at wi.rr.com (Raymond L. Buvel)
Date: Sat, 19 Feb 2005 07:07:06 -0600
Subject: newbie question on python 2.4 and tkinter
In-Reply-To: <4216C44B.6010009@comcast.net>
References: <mailman.2770.1108671387.22381.python-list@python.org>
	<4216C44B.6010009@comcast.net>
Message-ID: <HPGRd.17219$Sq5.8778@twister.rdc-kc.rr.com>

David Joyner wrote:
> Hi:
> I'm trying to compile python 2.4 with tkinter.
> (I'm trying to write a gui interface which
> calls a program called GAP - I'm hoping to use
> subprocess, a python 2.4 module, since I was getting
> deadlocks using popen).
> 
> The instructions at the python web site said basically
> to edit the /Modules/Setup file and recompile.
> The edits consist of determining with location of various
> Tcl/Tk libraries, header files, etc. I was wondering if
> anyone could help out with how to determine these.
> I have a suse 9.1 box and a new debian laptop, both of which
> I would like to configure with python 2.4 and tkinter.
> - David Joyner
The problem is most likely missing header files for the Tcl/Tk 
libraries.  Most Linux distributions (including SuSE) package the 
required files separately from the libraries.  In Yast, look for 
packages with the same name and a -dev suffix.  Once you have installed 
these, tkinter will be automatically built without any need to edit 
/Modules/Setup.

If you are running Debian testing or unstable, you just need to install 
the python2.4 and python2.4-tk modules.  If you need to compile 
extension modules, you will also need python2.4-dev.

Hope this helps.

Ray Buvel


From gabriel.cooper at mediapulse.com  Mon Feb 14 09:51:35 2005
From: gabriel.cooper at mediapulse.com (Gabriel Cooper)
Date: Mon, 14 Feb 2005 09:51:35 -0500
Subject: Python UPS / FedEx Shipping Module
In-Reply-To: <b54d0489050212123430ed621d@mail.gmail.com>
References: <mailman.2411.1108149803.22381.python-list@python.org>	<udePd.660$nC5.453@twister.nyroc.rr.com>
	<b54d0489050212123430ed621d@mail.gmail.com>
Message-ID: <4210BAF7.9030106@mediapulse.com>



Tom Willis wrote:

>Are the modules just accessing the published apis for their webservices?
>
>I'm just wondering because I used to work for a logistics mgmt 
>company that paid money to be a strategic partner with
>FedEx/UPS/Airborn etc so that they could information on how to return
>rates/print labels/generate edi's/calculate arrival times etc.
>
>I'd get a good laugh out of it suddenly being freely available now.
>
Yes, they use the free API's that have always been freely available. 
They're just *Impossible* to find on either of UPS's OR FedEx's 
websites. It took me no less than an hour and likely more just to find 
the documentation pages on each site. As for putting them up on the web, 
I should be able to get them up by the end of the week.

Gabriel.


From fuzzyman at gmail.com  Thu Feb  3 03:31:25 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 3 Feb 2005 00:31:25 -0800
Subject: IDLE history, Python IDE, and Interactive Python with Vim
In-Reply-To: <opsllommgvb1cml1@ashot>
References: <opsllommgvb1cml1@ashot>
Message-ID: <1107419485.368275.45240@l41g2000cwc.googlegroups.com>

If you use IPython for your interactive mode stuff, you'll have a nice
history...
Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From peter.mosley at talk21.com  Sun Feb  6 09:30:24 2005
From: peter.mosley at talk21.com (Peter)
Date: 6 Feb 2005 06:30:24 -0800
Subject: Curses on Windows
Message-ID: <72c8d50d.0502060630.1c561599@posting.google.com>

Last November I posted a message asking for advice on using simple
screen handling techniques under Windows.  Since then I have been
occupied with family / job /Christmas /living  and trying to
understand curses under linux (it works, seems very complex, sure I'm
missing something ...).  Only now am I returning to my original query.

One reply (in fact the only reply - thanks Tim Golden) suggested I
look at http://flangy.com/dev/python/curses/

Just tried that and got the message

"You don't have permission to access
/dev/python/curses/files/wcurses-0.1-py2.4.zip on this server."

any ideas why I can't access it - or any alternative URL's, or indeed
any other suggestions at all!  Grateful for any reply.

The email address is the one I registered under Google, and is now
defunct!

Peter


From mahs at telcopartners.com  Sat Feb  5 15:26:09 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sat, 05 Feb 2005 12:26:09 -0800
Subject: empty classes as c structs?
In-Reply-To: <MIadnXgLYun0hJjfRVn-2Q@comcast.com>
References: <mailman.1906.1107543562.22381.python-list@python.org>	<7rSdne7BcbDeV57fRVn-jg@comcast.com>	<mailman.1963.1107594941.22381.python-list@python.org>	<1gric2n.17myhon1hfrc6gN%aleaxit@yahoo.com>	<mailman.1973.1107618702.22381.python-list@python.org>
	<MIadnXgLYun0hJjfRVn-2Q@comcast.com>
Message-ID: <cu39uh$t69$2@sea.gmane.org>

Steven Bethard wrote:
> Nick Coghlan wrote:
> 

>>>
>>> class attr_view(object):
>>>     def __init__(self, data):
>>>         self.__dict__ = data
>>
>>
>> I think the idea definitely deserves mention as a possible 
>> implementation strategy in the generic objects PEP, with the data 
>> argument made optional:
> 
> 
> That's basically what the current implementation does (although I use 
> 'update' instead of '=').  The code is complicated because the 
> implementation also takes all the argument types that dicts take.
> 
> STeVe

Have you noted the similarity of bunch and types.ModuleType?

perhaps module.__init__  could take an additional keyword argument to set its 
__dict__

Michael



From nick at craig-wood.com  Thu Feb 17 04:30:02 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 17 Feb 2005 09:30:02 GMT
Subject: Why doesn't join() call str() on its arguments?
References: <37hippF4gcimiU1@individual.net>
	<qi771152ai1d5evvj1bnr4t7k51k1ivcbn@4ax.com>
	<37hqlrF59l2b2U1@individual.net>
	<873bvw9nqh.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
Message-ID: <slrnd18lvg.9ng.nick@irishsea.home.craig-wood.com>

Nick Vargish <nav+posts at bandersnatch.org> wrote:
>  I feel pretty much the opposite... If a non-string-type has managed to
>  get into my list-of-strings, then something has gone wrong and I would
>  like to know about this potential problem.

This is a good argument.

Why not have another method to do this?  I propose joinany which will
join any type of object together, not just strings

That way it becomes less of a poke in the eye to backwards
compatibility too.

>  Nick "Explicit is better than Implicit"

Aye!

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


From stefan.behnel-n05pAM at web.de  Sun Feb 13 11:49:13 2005
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Sun, 13 Feb 2005 17:49:13 +0100
Subject: changing __call__ on demand
Message-ID: <cuo0e1$4l2$1@lnx107.hrz.tu-darmstadt.de>

Hi!

This somewhat puzzles me:

Python 2.4 (#1, Feb  3 2005, 16:47:05)
[GCC 3.3.4 (pre 3.3.5 20040809)] on linux2
Type "help", "copyright", "credits" or "license" for more information.

.>>> class test(object):
...   def __init__(self):
...     self.__call__ = self.__call1
...   def __call1(self):
...     print 1
...   def __call__(self):
...     print 2
...
.>>> t = test()
.>>> t()
2

If I take out the __call__ method completely and only set it in __init__, I 
get a TypeError saying that test is not callable.

I want to use this in order to provide different implementations based on the 
object configuration. Calculating the right function to call is non-trivial 
and calls are frequent, so I want to change __call__ in order to run the right 
function directly.

I know, I could use another level of indirection:

def __call__(self):
   self.the_right_method()

and then set the_right_method accordingly, but I find that somewhat 
sub-optimal. Is there a way to change __call__ after class creation?

Stefan


From peter at engcorp.com  Wed Feb 16 20:26:05 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 16 Feb 2005 20:26:05 -0500
Subject: web spider and password protected pages
In-Reply-To: <1108592930.373112.90560@c13g2000cwb.googlegroups.com>
References: <1108580601.884193.263890@g14g2000cwa.googlegroups.com>
	<_LudnUg0vJIsLI7fRVn-rA@powergate.ca>
	<1108592930.373112.90560@c13g2000cwb.googlegroups.com>
Message-ID: <RbCdnaiwxvdCb47fRVn-qg@powergate.ca>

jdonnell wrote:
> "I quickly found
> a page that starts "Here is an explanation about how to handle password
> protected sites."
> 
> ...
> 
> I hope that teaches you a bit about how to fish, rather than
> just giving you one. ;-) "
> 
> Actually, I found a much easier solution, but since you know how to
> fish I don't need to tell you what it is ;)

Nevertheless, perhaps you'll still post the answer here so
that others who come along later can benefit from your
experience in the same way that you benefited from reading
whatever page you found (even if you didn't benefit from
my suggestions...).

That's the way this forum works best -- thanks,
-Peter


From bj_666 at gmx.net  Tue Feb  8 16:35:26 2005
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 08 Feb 2005 22:35:26 +0100
Subject: overwriting method in baseclass
References: <Xns95F64CD37EEF7cpl19ghumspamgourmet@195.20.224.116>	<420791a7$0$17127$626a14ce@news.free.fr>	<Xns95F6BFBF27210cpl19ghumspamgourmet@195.20.224.116>
Message-ID: <pan.2005.02.08.20.24.43.76297@gmx.net>

In <Xns95F6BFBF27210cpl19ghumspamgourmet at 195.20.224.116>, Harald Massa
wrote:

> Thanks for that recommendation, I really do use subversion for some time. 
> But how can I use it to solve this problem? I do changes to the common 
> baseclass which is OUTSIDE my development. I quite correctly assume that 
> the developers of the classlib also use Subversion, alas, having no public 
> access.
> 
> So HOW can SVN be of any use for THIS prob?

Take a look at the Subversion documentation (the "book") and search for
`Vendor branches`.

First paragraph of that section:

  As is especially the case when developing software, the data that you
  maintain under version control is often closely related to, or perhaps
  dependent upon, someone else's data. Generally, the needs of your
  project will dictate that you stay as up-to-date as possible with the
  data provided by that external entity without sacrificing the stability
  of your own project. [...]

The section deals specifically with the situation how to manage 3rd party
source code with subversion which you want to update from time to time and
even apply some modifications.

Ciao,
	Marc 'BlackJack' Rintsch




From timr at probo.com  Wed Feb 23 02:30:41 2005
From: timr at probo.com (Tim Roberts)
Date: Tue, 22 Feb 2005 23:30:41 -0800
Subject: Comm. between Python and PHP
References: <lnsm11d91ug2gfh5gjvutga4dthhg0rjbf@4ax.com>
Message-ID: <u3co11t05lh452h17ir7psfgj18rg3lhs4@4ax.com>

Nils Emil P. Larsen <ne-nospam7 at post.cybercity.dk> wrote:
>
>Hello
>
>I'm building a daemon in Python. It will measure and control some
>physical devices on a serial bus. Since it is a daemon, it will never
>terminate and I can't interfere with the regulation of the devices by
>using command line parameters. I want to control the regulation by
>using a Internet browser.
>
>What is the easiest way to make my threaded Python daemon communicate
>with a PHP-script running from Apache2 on localhost?

Python is perfectly capable of generating HTML.  You don't have to demean
yourself by working in PHP.

Sockets and pipe files are common methods of communicating with a daemon.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From daniel at bowettsolutions.com  Wed Feb 16 09:26:09 2005
From: daniel at bowettsolutions.com (Daniel Bowett)
Date: Wed, 16 Feb 2005 14:26:09 +0000
Subject: MYSQL - how to install ?
In-Reply-To: <1108562949.825258.297260@f14g2000cwb.googlegroups.com>
References: <1108547199.260223.211450@f14g2000cwb.googlegroups.com>	<1108556905.444394.210020@l41g2000cwc.googlegroups.com>
	<1108562949.825258.297260@f14g2000cwb.googlegroups.com>
Message-ID: <cuvldt$nkt$1@sea.gmane.org>

Lad wrote:
> I am sorry it was my fault I did not say that clearly.
>  I do not have a problem to install MySQL  server but I do not know how
> to install MySQLdb module on my windowsXP so that I can work  with
> MySQL server via Python 2.3.
> Thanks for help
> Lad
> 

Try this installer, if you want a newer version you will need to compile 
it yourself.

http://prdownloads.sourceforge.net/mysql-python/MySQL-python.exe-1.0.0.win32-my4.1-py2.3.exe?download



From cpl.19.ghum at spamgourmet.com  Thu Feb  3 15:26:06 2005
From: cpl.19.ghum at spamgourmet.com (Harald Massa)
Date: Thu, 3 Feb 2005 20:26:06 +0000 (UTC)
Subject: Is there a market for python developers?
References: <1107440354.317628.221090@g14g2000cwa.googlegroups.com>
Message-ID: <Xns95F2DA1371283cpl19ghumspamgourmet@195.20.224.116>

> I am new to python and took my first attempts at working with this
> language today.  Is there a market for people who work with Python?

Absolutely no. Only unimportant and unknown companies like Google, Nokia, 
Industrial Light and Magic as well as GHUM Harald Massa do work with 
Python.

Harald 


From 18k11tm001 at sneakemail.com  Fri Feb 11 18:14:52 2005
From: 18k11tm001 at sneakemail.com (18k11tm001 at sneakemail.com)
Date: 11 Feb 2005 15:14:52 -0800
Subject: pre-check for string-to-number conversion
Message-ID: <1108163692.700703.183870@o13g2000cwo.googlegroups.com>

I am reading an ASCII data file and converting some of the strings to
integers or floats. However, some of the data is corrupted and the
conversion doesn't work. I know that I can us exceptions, but they
don't seem like the cleanest and simplest solution to me. I would like
to simply perform a pre-check before I do the conversion, but I can't
figure out how to do it. I see that strings have a function called
isdigit(), but that simply checks whether all characters in the string
are digits -- not what I need. Any suggestions? Thanks.



From caleb1 at telkomsa.net  Tue Feb  8 22:49:20 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Tue, 08 Feb 2005 22:49:20 -0500
Subject: python code with indention
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
	<110hq18fbebn0b1@news.supernews.com>
Message-ID: <opslwvkipx1js0xs@news.telkomsa.net>


>> is it possible to write python code without any indentation?
>>
>> Xah

> You can, of course, write a silly little inline script without
> any control structures that will all line up at the left
> margain. So what?
>
> John Roth

I agree, John, I don't get it.  The vast majority of programmers (albiet  
 from my limited perspective) indent their code anyway, whether required by  
the language or not.   This was one of the first features of Python I  
learned about that made me sit up and take notice -- here was a truly  
pragmatic design choice that actually benefitted the programmer (by not  
having to type all those delimiters).

Caleb


From socheat-news at iomanip.com  Tue Feb  1 02:28:29 2005
From: socheat-news at iomanip.com (Socheat Sou)
Date: Tue, 01 Feb 2005 02:28:29 -0500
Subject: Advice on OSX cocoa app with Python backend
Message-ID: <1107242909.3662.10.camel@temp.ant>

After a brief, but informative, discussion on Freenode's  #zope
chatroom, I was advised to consult the gurus on c.l.p.

I'm working for a small company who is in desperate need to rewrite it's
15+ year old, flat-file, client-tracking database.  The staff uses OSX,
while I administer the couple linux servers we have to run our website
and some internal sites.  In our initial brainstorming session, we
decided to go with a Python backend server, handling the database and
business logic, and a native Cocoa application on the client side, with
enough glue to make the two stick.

Also, after a bit of research, I discovered Twisted and PB.  I figured
I'd have to write a customized backend to meet our needs.  However,
seeing as how 1) I've never written a netwo
rk application before, let alone a multi-threaded application and 2) I'm
the sole developer
 on this project, I was looking for as many API's, modules, frameworks,
and/or prebuilt solutions as possible to help me out.

I initially thought of Zope because I had often heard it referred to as
an application serv
er, so I thought it might be something I could use as a basis, write the
business logic, and have the Cocoa application, with some PyObjC,
communicate with the Zope server.  We're definately not looking for a
web-based application, so I wasn't quite sure Zope was what I wa
nted.

For those that are interested, we're looking at using MySQL as the DBMS.
>From what little I know of OODBMS it doesn't seem like the right choice
because aside from data entry and client record lookups, the biggest use
of the database would be to generate reports and tabulated data on an
arbitrary set of fields.  I've read that this isn't exactly the strength
of OODBMS?

We are also looking at a server-client architecture, rather than
individual clients connecting to the database over the network, because
there are some features the staff would like (such as something similar
to message passing between each other, and also being able to administer
connected users).

Does anyone here have any experience building an OSX application with
Python running the show behind the scenes?  I hope I didn't come off as
asking "tell me what to do", but rather I would appreciate any advice or
links to resources that might be helpful in this project.

Thanks for your time!
Socheat




From devries at idolstarastronomer.com  Tue Feb  8 10:02:36 2005
From: devries at idolstarastronomer.com (Christopher De Vries)
Date: Tue, 8 Feb 2005 10:02:36 -0500
Subject: Synchronizing methods of a class
In-Reply-To: <1107806222.385926.235060@o13g2000cwo.googlegroups.com>
References: <1107806222.385926.235060@o13g2000cwo.googlegroups.com>
Message-ID: <20050208150236.GA23317@miyu.cjas.org>

On Mon, Feb 07, 2005 at 11:57:02AM -0800, Keith Veleba wrote:
> Background:
> I'm working on a project where I have to do some serious
> multithreading. I've worked up a decorator in Python 2.3.4 to implement
> the lock semantics required for specific functions I want to
> synchronize:

I found Chris Liechti's example very helpful when working on a similar
project. See
http://groups-beta.google.com/group/comp.lang.python/msg/d647a830de39d1db
. Also, I strongly suggest using threading.RLock() objects instead of primitive
locks. With Rlocks one thread can acquire the same lock multiple times without
blocking. This is useful if one synchronized method calls another synchronized method.

> Obviously, my classes have to instantiate the _lock in __init__ in
> order for this to work.

The great thing about Chris's example is that the first time a synchronized
method is called a lock is instantiated, so you don't have to worry about this
step.

> Problem:
> 
> When iterating through klass.__dict__.items() in the convenience
> method, I only get the instance variables of the class.  No functions.
> I've found a way to get the function list, by iterating through
> klass.__class__.__dict__ .

I'm not sure why klass.__dict__.items() isn't working for you. I tried a simple
example:

class simple(object):
    def hello(self):
        print "Hello World"

def methods(cls):
    for name,value in cls.__dict__.items():
        if callable(value):
            print name

>>> methods(simple)
hello


Chris


From x at y.z  Mon Feb 14 21:44:59 2005
From: x at y.z (D H)
Date: Mon, 14 Feb 2005 20:44:59 -0600
Subject: wxPython OGL future
In-Reply-To: <1108428501.441786.154130@g14g2000cwa.googlegroups.com>
References: <1108428501.441786.154130@g14g2000cwa.googlegroups.com>
Message-ID: <1ZidnRhqWsOy_4zfRVn-rg@comcast.com>

PD wrote:
> Hi Everyone,
> 
> I am sort of a new developer to python and working in an academic
> environment. I climbed the learning curve on wxPython far enough to get
> the functionality I want out of it so far... Now Im in need of a
> diagramming library (something visio-like) to use for my software and
> the only option I have seen is OGL. Yet I read that OGL is dead, no
> longer maintained, obsucure and lacking documentation. Instead of
> taking a leap of faith and walking off a cliff, Ide appreciate if some
> people out there who have come across a similar problem have any
> solutions or suggestions for me...

Well OGL still works as far as I know.
Check out also pyxel.  It hasn't been updated in almost a year though:
http://bellsouthpwp.net/p/r/prochak/pyxel.html


> I am so disappointed at the moment I think Im about ready to throw in
> the towel and crawl back to java. I love python, but it has some real
> difficulties when it comes to making library choices on what _to_ and
> _not to_ get yourself into.

Python baby, you broke my heart :)

You can still use python in java, see jython.
There is a similar tool that works in Java or .NET called Piccolo:
http://www.cs.umd.edu/hcil/piccolo/
I'm using it with boo, a python-like language for .NET and Mono: 
http://boo.codehaus.org/ but you can also use it with IronPython or 
Jython.  On the Linux side, see DiaCanvas (can use from CPython with 
pygtk) and DiaCanvas-Sharp (can use from boo or ironpython):
http://diacanvas.sourceforge.net/
http://diacanvas.sourceforge.net/csharp.php


From fumanchu at amor.org  Mon Feb 21 13:07:14 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Mon, 21 Feb 2005 10:07:14 -0800
Subject: recommended way of generating HTML from Python
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E3024FA1@exchange.hqamor.amorhq.net>

Michele Simionato wrote:
> The problem is a problem of standardization, indeed.
> There are plenty of recipes to do the same job, I just
> would like to use a blessed one (I am teaching a Python
> course and I do not know what to recommend to my students).

Wouldn't we *all* like all of our problems worked out for us. ;)

> class HTMLTag(object):
>     [wonderful code snipped]

That's a reasonable start, and you have some fun magic in there, but I think you're going to hit a wall of complexity Real Soon Now--elements without a separate closing tag, safe attribute quoting, and general usability pressures will start to bite you. I note also what Kent said about separation, and the desire to "hand things off to a web designer".

In my own work, I tried to meet both of these concerns with a single Assembly class, which you can see at http://www.aminus.org/rbre/cation/html/assembly.py. At its most basic, it is nothing more than a namespace plus a template. I think it solves the separation issue nicely by allowing the template to be loaded from a file, whether that file be HTML from a designer, HTML "bulding blocks" which a developer might supply, or even CSS, or an email template. But it also allows for useful subclassing, for code generation. Here's an example: the subclass for "hidden input" elements:

class HiddenElement(Assembly):
    """An Assembly for generating HTML <input type='hidden'> elements
    
    Usage:
        output = assembly.HiddenElement(app).assemble_all(key)
    """
    
    templateText = u'<input type="hidden" name=%(name)s value=%(value)s />'
    
    def assemble_all(self, name, value):
        return self.assemble({u'name': html.quote(name),
                              u'value': html.quote(value)})

The "assemble_all" method allows the developer to focus on the important bits (name and value) and forget the implementation details. Check out the TableRows class for a more complex example, whereby an HTML table can be built incrementally, inline with the data access logic.

Now, getting into usability concerns (that framework and library authors tend to obsess over ;) may be too advanced for your class at the moment. But that's why recipes are recipes, not standard library modules: they're often biased toward quick and dirty scripting, not usable, maintainable edifices.


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org


From nick at craig-wood.com  Wed Feb  9 05:31:22 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 09 Feb 2005 10:31:22 GMT
Subject: Efficient checksum calculating on lagre files
References: <5o2nd2-5hl.ln1@pluto.i.infosense.no>
	<slrnd0hrou.l3u.nick@irishsea.home.craig-wood.com>
	<is52dioy.fsf@python.net>
Message-ID: <slrnd0jm9e.l3u.nick@irishsea.home.craig-wood.com>

Thomas Heller <theller at python.net> wrote:
>  Nick Craig-Wood <nick at craig-wood.com> writes:
> > Here is an implementation of md5sum in python.  Its the same speed
> > give or take as md5sum itself.  This isn't suprising since md5sum is
> > dominated by CPU usage of the MD5 routine (in C in both cases) and/or
> > io (also in C).
> 
>  Your code won't work correctly on Windows, since you have to open files
>  with mode 'rb'.

Yes you are correct (good old Windows ;-)

>  But there's a perfect working version in the Python distribution already:
>  tools/Scripts/md5sum.py

The above is easier to understand though.

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


From michele.simionato at gmail.com  Tue Feb 15 08:52:34 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 15 Feb 2005 05:52:34 -0800
Subject: Problems in making calulating program.
In-Reply-To: <614c778e.0502150539.4aa742a1@posting.google.com>
References: <614c778e.0502150539.4aa742a1@posting.google.com>
Message-ID: <1108475554.129232.187420@g14g2000cwa.googlegroups.com>

You were on the right track before: look at the tutor
mailing list ;)

<no offence intended, but there is an entire
list devoted to this kind of questions>


      Michele Simionato



From martin at v.loewis.de  Tue Feb  8 15:59:35 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 08 Feb 2005 21:59:35 +0100
Subject: Printing Filenames with non-Ascii-Characters
In-Reply-To: <36bka5F4vp17cU1@individual.net>
References: <36a3ikF4uk8r0U1@individual.net>
	<ctos5r$t3b$1@news2.tilbu1.nb.home.nl>
	<36bka5F4vp17cU1@individual.net>
Message-ID: <42092837.1080204@v.loewis.de>

Marian Aldenh?vel wrote:
>  > If you're printing to the console, modern Pythons will try to guess the
>  > console's encoding (e.g. cp850).
> 
> But it seems to have quessed wrong. I don't blame it, I would not know of
> any way to reliably figure out this setting.

It's actually very easy. Python invokes GetConsoleOutputCP() to find out
the encoding of the console (if the output is to a console, as
determined by isatty()).

> My console can print the filenames in question fine, I can verify that by
> simple listing the directory, so it can display more than plain ascii.
> The error message seems to indicate that ascii is used as target.

Yes, because that is the fallback.

> So if I were to fix this in sity.py to configure whatever encoding is
> actually used on my system, I could print() my filenames without explicitly
> calling encode()?

Yes. However, you cannot put a reasonable value in there, because
different parts of your system use different encodings. In particular,
the console likely uses CP 850, whereas the rest of your system
likely uses CP 1252.

> So wouldn't fixing site.py be the right thing to do? 

No. If they put CP850 into sitecustomize, Unicode in user interfaces
(menus etc) might be displayed as moji-bake, as the user interface
will likely assume CP1252, not CP850.

Regards,
Martin


From AnOvercomer02 at webtv.zzn.com  Tue Feb  8 04:44:05 2005
From: AnOvercomer02 at webtv.zzn.com (AnOvercomer02@webtv.net (Cody Houston))
Date: 8 Feb 2005 01:44:05 -0800
Subject: Learning Python - resources and ideas
Message-ID: <1107855845.383970.70210@o13g2000cwo.googlegroups.com>

Hi. What is the best way to learn Python? None of the local schools
near me teach any courses on the topic. Thanks.

--

Cody Houston
AnOvercomer02 at webtv.net



From vegeta.z at gmail.com  Mon Feb 14 01:56:52 2005
From: vegeta.z at gmail.com (vegetax)
Date: Mon, 14 Feb 2005 02:56:52 -0400
Subject: custom classes in sets
References: <338366A6D2E2CA4C9DAEAE652E12A1DE0252035E@au3010avexu1.global.avaya.com>
Message-ID: <cuphv9$fqa$1@sea.gmane.org>

Delaney, Timothy C (Timothy) wrote:

> vegetax wrote:
> 
>>   def __hashcode__(s): return s.path.__hashcode__()
> 
> Try __hash__ ...
> 
> Tim Delaney

sorry about the typo, it is indead __hash__() that i tried



From michele.simionato at gmail.com  Wed Feb  9 09:47:37 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 9 Feb 2005 06:47:37 -0800
Subject: Definitive documentation on newstyle classes? (WAS: Pickling
	and inheritance are making me hurt)
In-Reply-To: <420A1D3E.5080407@sympatico.ca>
References: <1d6cdae305020516467620aa0@mail.gmail.com>
	<mailman.2002.1107653711.22381.python-list@python.org>
	<4208FBFD.6000303@sympatico.ca>
	<1107925915.042588.43000@c13g2000cwb.googlegroups.com>
	<420A1D3E.5080407@sympatico.ca>
Message-ID: <1107960457.142286.269510@c13g2000cwb.googlegroups.com>

Colin:
> It seems to me that __new__ should probably be deprecated for mutable
> classes.

Certainly not! It is useful for mutable classes too. One just must be
careful.

        Michele Simionato



From deetsNOSPAM at web.de  Tue Feb  1 09:30:05 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Tue, 01 Feb 2005 15:30:05 +0100
Subject: type of simple object
References: <1107255752.258025.50870@z14g2000cwz.googlegroups.com>
	<1107257264.146280.89560@c13g2000cwb.googlegroups.com>
	<1107258136.815344.145380@c13g2000cwb.googlegroups.com>
	<tyfy8e8lcef.fsf@pcepsft001.cern.ch>
	<1107261198.943087.80960@z14g2000cwz.googlegroups.com>
	<tyfhdkwl9u3.fsf@pcepsft001.cern.ch>
	<1107265279.327793.26430@z14g2000cwz.googlegroups.com>
Message-ID: <369hubF4uhoj5U1@individual.net>

> Can you tell me how can I check if an object is a sequence (you are
> right, this is actually what I want)?

read the docs for the module "types."
-- 
Regards,

Diez B. Roggisch


From aleaxit at yahoo.com  Sun Feb  6 08:47:34 2005
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 6 Feb 2005 14:47:34 +0100
Subject: bad generator performance
References: <cu402b$83r$00$1@news.t-online.com>
	<cu40uv$s4b$02$1@news.t-online.com>
	<mailman.2008.1107662630.22381.python-list@python.org>
	<cu54p3$mal$05$1@news.t-online.com>
Message-ID: <1grkgjz.t6m9diq9bp6N%aleaxit@yahoo.com>

Johannes Ahl-mann <softpro at gmx.net> wrote:

> a non-recursive solution to traversing a recursive data type is bound to
> get ugly, isn't it?

Not necessarily: sometimes using an explicit stack can be quite pretty,
depending.  E.g.:

def all_leaves(root):
    stack = [root]
    while stack:
        rightmost = stack.pop()
        if is_leaf(rightmost):
            yield rightmost
        else:
            stack.extend(rightmost.all_children())

This isn't the traversing you're looking for, but it is _a_ traversing
of a recursive data type, non-recursive, and IMHO quite pretty.


Alex


From kanenas at tcomcastd.tnet  Thu Feb 10 19:52:18 2005
From: kanenas at tcomcastd.tnet (Kanenas)
Date: Thu, 10 Feb 2005 16:52:18 -0800
Subject: deepcopy chokes with TypeError on dynamically assigned instance
	method
References: <698m01djeu9jqpnvvk64vmc488e5c026im@4ax.com>
	<mailman.2312.1108043416.22381.python-list@python.org>
Message-ID: <vd0o01l0h9893j22ejgmtrvc1k4ael652q@4ax.com>

On Thu, 10 Feb 2005 23:50:09 +1000, Nick Coghlan
<ncoghlan at iinet.net.au> wrote:

>>     def __init__(self, l=[]):
>
>Change this too:
>   def __init__(self, l=None):
>     if l is None: l = []

Same error.  The only ways of not getting the TypeError I've found are
not to call deepcopy or not assign an instancemethod to an instance
attribute (assigning an instancemethod to a class attribute is fine).


From matternc at comcast.net  Sat Feb 26 21:01:46 2005
From: matternc at comcast.net (Chris Mattern)
Date: Sat, 26 Feb 2005 21:01:46 -0500
Subject: [perl-python] generate all possible pairings
References: <1109467591.827686.95540@f14g2000cwb.googlegroups.com>
	<86650eg4fg.fsf@guru.mired.org>
Message-ID: <T7adnUbtGt-Xt7zfRVn-1Q@comcast.com>

Mike Meyer wrote:

> "Xah Lee" <xah at xahlee.org> writes:
> 
>> This is brought to you by the perl-python community. To subscribe, see
>> http://xahlee.org/perl-python/python.html
> 
> assert len(perl-python community) == 1
> 
>        <mike
Apparently there are actually people who subscribe.  Maybe they're 
people in search of a good laugh...

I suppose they could be sock-puppets, but even for Xah, inventing 
sock-puppets just to up the subscription count of your mail list
seems a bit much...

-- 
             Christopher Mattern

"Which one you figure tracked us?"
"The ugly one, sir."
"...Could you be more specific?"


From tameyer at ihug.co.nz  Mon Feb 21 23:10:50 2005
From: tameyer at ihug.co.nz (Tony Meyer)
Date: Tue, 22 Feb 2005 17:10:50 +1300
Subject: copying or moving the mail message using imaplib
In-Reply-To: <1109044151.869953.187270@c13g2000cwb.googlegroups.com>
Message-ID: <002701c51894$7f1eab70$0700000a@massey.ac.nz>

> My problem is I want to move the mail message to other folder in 
> the mail using imaplib (E.g) I want to move a message from 
> the inbox to the Draft folder in my account using python 
> code. Can any one help me by giving a sample code to do this?

IMAP is a terrible terrible protocol.  It is not possible to move messages,
whatever language you're using to interact with the IMAP server.

You can copy the message to the new folder (copy() function) and then mark
the old copy as deleted (store() function) but you then either have lots of
/Deleted messages in the original folder, or need to purge/expunge it and
remove any other messages that are /Deleted as well.

The python imaplib is a very thin wrapper over the IMAP protocol.  If you
want to use it, then I highly recommend that you do so with a copy of the
IMAP RFC handy (it's really just simple translation from the raw IMAP codes
to Python code).

=Tony.Meyer



From roy at panix.com  Tue Feb  8 10:36:59 2005
From: roy at panix.com (Roy Smith)
Date: 8 Feb 2005 10:36:59 -0500
Subject: Loop in list.
References: <1107874174.445345.41230@c13g2000cwb.googlegroups.com>
Message-ID: <cuamar$em3$1@panix2.panix.com>

Jim <jtp11 at att.net> wrote:
>Where did this type of structure come from:
>
>mat = ['a' for i in range(3)]    ?
>
>This will produce a list of three elements but
>I don't see reference for it in any of the books.

It's a list comprehension.  Unfortunately, this is a bad example of
one, since a much simplier way of writing the same thing would be:

mat = ['a'] * 3

After several years of them being in the language, I'm still somewhat
up in the air about the wisdom of list comprehensions.  There is no
doubt that they're convenient and compact, but I think they make code
more difficult to read.  The functional programming folks will
certainly disagree, and I realize I'm probably in the minority on
this, but that's my opinion.


From xifxif at gmail.com  Sun Feb 27 10:14:08 2005
From: xifxif at gmail.com (xifxif at gmail.com)
Date: 27 Feb 2005 07:14:08 -0800
Subject: Sharing a method (function) among several objects.
Message-ID: <1109517248.084515.104280@z14g2000cwz.googlegroups.com>

Hello

There are several different objects. However, they all share the same
function.

Since they are not the same or similar, it's not logical to use a
common superclass.

So I'm asking, what's a good way to allow those objects to share that
function?

The best solution I've found so far is to put that function in a
module, and have all objects import and use it. But I doubt that's a
good use-case for modules; writing and importing a module that contains
just a single function seems like an abuse.

Thanks,
Xif



From ilias at lazaridis.com  Mon Feb 14 05:31:47 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Mon, 14 Feb 2005 12:31:47 +0200
Subject: - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <37bcdkF5bg7knU1@individual.net>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108370491.792820.142200@z14g2000cwz.googlegroups.com>
	<cuprg2$6rt$1@usenet.otenet.gr> <37bcdkF5bg7knU1@individual.net>
Message-ID: <cupumi$kfs$1@usenet.otenet.gr>

Diez B. Roggisch wrote:
> Ilias Lazaridis wrote:
> 
>> I want to develope large scale applications, and for this I need an
>>  stable official version of the python language, either binary or 
>> produced directly out of official sources, completely with an 
>> open-source tool-chain.
> 
> Where does that requirement come from? If you want to create large
> scale apps, the price for a msvc++ compiler shouldn't matter. And:
> Windows is a non-free platform at first. If you have to or want to
> develop on top of it, be prepared to pay. Its as simple as that. If
> you want something cheaper - you'll have to put some effort into it.
> Or use linux.

I will not go into this 'twisting' games.

the requirement "Use of an open-source tool-chain" is nothing special.

> Additionally, your point is moot because there is no need for python
> _core_ developers or the foundation to support every imaginable
> platform/compiler combination.

MinGW is not "every imaginable platform/compliler".

> Instead this can be done by companies - see activestate. So if you
> want it, step up and do it yourself so your work _becomes_ the
> official mingw port. Community gratitude would be guaranteed.

I'm not intrested in creating an distribution.

I provide an analysis of the situation, context: newcomer, disapointed 
from JAVA.

One of my questions is:

[REQUOTE]
>> c) Why are the following efforts not _directly_ included in the
>> python source code base?
>> 
>> http://jove.prohosting.com/iwave/ipython/pyMinGW.html
[/REQUOTE]

.

-- 
http://lazaridis.com


From danperl at rogers.com  Mon Feb  7 11:51:18 2005
From: danperl at rogers.com (Dan Perl)
Date: Mon, 7 Feb 2005 11:51:18 -0500
Subject: Python on WWW - beginners question: what to choose?
References: <cu82v8$2f17$1@news.vol.cz>
Message-ID: <gcqdnZT6jscUAZrfRVn-gw@rogers.com>


"Almad" <writeme at almad.net> wrote in message 
news:cu82v8$2f17$1 at news.vol.cz...
> Hello,
>
> I'm currently starting with Python as a language for writing websites. I
> must say that I'm overwhelmed by the number of choices I have (mod_python
> with publisher, Vampire, mps, Spyce), cgi, fcgi, Webware, Zope,
> Plone, ...).
>
> Isn't there any article in style "this suite use this style of programming
> and is good for this type of applications"?

Have you looked at these links?
    http://www.python.org/pycon/papers/framework/web.html
    http://pyre.third-bit.com/pyweb/index.html
You may find also this interesting as a list to several links related to 
this topic:
    http://www.python.org/moin/WebProgramming

Dan 




From petite.abeille at gmail.com  Tue Feb  1 08:46:03 2005
From: petite.abeille at gmail.com (PA)
Date: Tue, 1 Feb 2005 14:46:03 +0100
Subject: [OT] post-structuralist object oriented system
Message-ID: <b760e9e04e8f919e3c2fd8ec94c21058@gmail.com>

For your entertainment:

"Lua?s Story of O"
http://alt.textdrive.com/lua/19/lua-story-of-o

Cheers

--
PA, Onnay Equitursay
http://alt.textdrive.com/



From alan.gauld at btinternet.com  Wed Feb  2 14:32:47 2005
From: alan.gauld at btinternet.com (Alan Gauld)
Date: Wed, 2 Feb 2005 19:32:47 +0000 (UTC)
Subject: Advice on OSX cocoa app with Python backend
References: <1107242909.3662.10.camel@temp.ant>
	<41FF8310.7050801@holdenweb.com>
	<1107277936.7968.19.camel@temp.ant>
Message-ID: <lka201he4md7cetccotmnuaguo004gtkd1@4ax.com>

On Tue, 01 Feb 2005 12:12:15 -0500, Socheat Sou
<socheat-news at iomanip.com> wrote:
> the RDBMS, but some have suggested looking into OODBMS, like PostgreSQL,
> but from what I know of OODBMS they don't seem like the right fit for
> this project.

Calling PostGres an OODBMS might be stretching it a wee bit, but
it does have some OO features certainly. However if you are
simply using the DB as persistence in the server and for
reporting then an RDBMS should be fine and the technology is well
understood.

Alan G.
Author of the Learn to Program website
http://www.freenetpages.co.uk/hp/alan.gauld


From phil at riverbankcomputing.co.uk  Fri Feb  4 07:25:52 2005
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Fri, 4 Feb 2005 12:25:52 -0000 (GMT)
Subject: what version of pyQt are compatible with QT 3.1.1 educational ?
In-Reply-To: <ca136d6.0502040405.4e12bb48@posting.google.com>
References: <ca136d6.0502040405.4e12bb48@posting.google.com>
Message-ID: <12113.82.68.80.137.1107519952.squirrel@river-bank.demon.co.uk>

> hello
> I have QT 3.1.1 educational on my computer (Win XP)

That doesn't sound like you are conforming to Trolltech's Educational
License. To quote:

" The product may only be used on school hardware and on the school's
premises."

> I tried to install several version of pyQt (PyQt edu 3.13 Edu, PyQt
> edu 3.6, PyQT non-commercial 4.13, but I still can't import qt module.
>
> when I enter :
> import qt
> I have the following message :
> Import Error : DLL Load failed : cannot find the specified module
>
> do you have any idea please ?

As it's a binary package, the educational version of PyQt supports the
version of Qt that was current at the time. I think PyQt v3.7 to v3.11
supported that version of Qt.

Phil



From theller at python.net  Thu Feb 17 13:22:16 2005
From: theller at python.net (Thomas Heller)
Date: Thu, 17 Feb 2005 19:22:16 +0100
Subject: Convert a raw pointer to IDispatch
References: <4214a4ef$0$30359$636a15ce@news.free.fr>
Message-ID: <acq3t5bb.fsf@python.net>

Roger That <fabsk+news at free.fr> writes:

> Hi,
>
> I am trying to use the function "CreateStreamOnHGlobal" from python
> code (I need to pass an IStream object to MSXML, like I do in C++
> code).
>
> I was able to retrieve a pointer on the IStream object in this way:
>
> from ctypes import *
>
> stream = c_int()
> windll.ole32.CreateStreamOnHGlobal(c_long(0), c_long(1), byref(stream))
> print "%x"%stream.value
>
> The problem is that I would like to attach this pointer to a python
> IDispatch object (in Python only, not using a C++ DLL to do the
> stuff). Do you know a way to do it ?

What do you want to do with this pointer? Pass it to a function called
via ctypes?

Thomas


From erwin+usenet at andreasen.org  Mon Feb  7 10:49:14 2005
From: erwin+usenet at andreasen.org (Erwin S. Andreasen)
Date: Mon, 07 Feb 2005 16:49:14 +0100
Subject: Making dynamic data available via ODBC with Python
Message-ID: <877jlke5fp.fsf@andreasen.org>


I have a Python application server that manages several different data
sets, permits various reports to be run on them and the data to be
downloaded as tab-delimetered files, all via a web interface.

I'd like to explore the possibilities of making the data directly
available in Windows applications (such as Excel, where it would very
nice to directly do pivot tables from the live data) via ODBC.

So I basically need for my Python server (deployed on UNIX) to act as
a remotely queriable database. This is live and changing data, so I'd
prefer not to have to dump it into a real database first, but I
suppose that's one solution (e.g. letting PostgreSQL get the query,
run some trigger that asks my server to update the table with data and
then return the data).

Knowing little about the various available ODBC modules, one solution
seems to be to take a client/server protocol of an existing database
(such as PostgreSQL) and implement a Python server for it: so my
Python program acts like a server you could run the psql client up
against and so also get data via ODBC using the PG ODBC drivers. It
seems a bit complex because all I want to allow is to select a table
with a certain name, allow a query of what columns are available and
what type they are and to fetch the data, perhaps with minimal support
for filtering queries.

I've seen at least one program that emulates the PG client/server API
-- I think it stored some configuration data, so it acted like a
ordinary PG server you could run queries against but wasn't really
one. Its name completely escapes me at the moment though.

Is there some better way of doing this -- some way to provide tabular
data remotely to Windows machines, usable in Office programs, which
happens to already have some Python code written for it? Looking
around, there is at least one XML-to-ODBC bridge but encoding the
entire data file as XML is likely to have prohibitive overhead.



-- 
===============================================================
<erwin+usenet at andreasen.org>                    Herlev, Denmark     
<URL:http://www.andreasen.org/>                             <*>   
===============================================================



From jbzsmith at lycos.com  Tue Feb  8 22:09:27 2005
From: jbzsmith at lycos.com (Jim Smith)
Date: Tue, 08 Feb 2005 20:09:27 -0700
Subject: WYSIWYG wxPython "IDE"....?
In-Reply-To: <1107560658.584623.303310@o13g2000cwo.googlegroups.com>
References: <1107560658.584623.303310@o13g2000cwo.googlegroups.com>
Message-ID: <VoGdnWk4zeXB45TfRVn-3w@comcast.com>

Simon John wrote:
> I'm writing my 2nd large wxPython program, and after the problems I
> found doing the first's layout in code, I'd like to look at using a
> 'WYSIWYG' IDE, like VisualStudio does for MFC.
> 
> I've tried a few that I found, wxGlade is probably the best, although
> it seems to be not 100% WYSIWYG (like the widgets in the preview are
> not much like the final program), wxDesigner has a horrid GUI for a GUI
> designer! VisualWX gave me the 'now what?' feeling when I started a new
> project.....
> 
> I find the sizer layout thing is what's holding these programs back, is
> there another wxWidgets layout system, so that I could just drag'n'drop
> widgets wherever I want in a window, more like Qt or MFC?
> 
> I'd like to just put a TextCtrl with a few buttons underneath it
> without having to create two boxsizers or a gridsizer!
> 
> I'd like to create something like the main XMMS (or Winamp) window:
> 
> http://xmms.org/files/Skins/images/winamp_x_xmms.png
> 
> But that would be a 3-way vertical sizer, a 2-way horizontal and a
> 2-way vertical at least just for the main (top left) window.
> 


I have tried all the GUI tools for wx and I think wxDesigner is the 
best.  It is commercial, but worth it.

http://www.roebling.de/


From apardon at forel.vub.ac.be  Thu Feb 10 08:23:44 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 10 Feb 2005 13:23:44 GMT
Subject: variable declaration
References: <4202A022.3050209@netscape.net>
	<MSGID_2=3A5025=2F3.131_4204b0a9@fidonet.org>
	<mailman.1978.1107622451.22381.python-list@python.org>
	<slrnd0epjg.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2069.1107783321.22381.python-list@python.org>
	<slrnd0esqn.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2152.1107854937.22381.python-list@python.org>
	<slrnd0h3e9.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2156.1107859510.22381.python-list@python.org>
	<slrnd0h9r8.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2239.1107951749.22381.python-list@python.org>
	<slrnd0mg7t.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2304.1108039814.22381.python-list@python.org>
Message-ID: <slrnd0mo2u.26q.apardon@rcpc42.vub.ac.be>

Op 2005-02-10, Nick Coghlan schreef <ncoghlan at iinet.net.au>:
> Antoon Pardon wrote:
>> Well it seems you have some fair points. I'll just stop here stating
>> that I would like to have it, even if it proved to be slower. Speed
>> is not that big a factor in the things I write.
>
> Oh, certainly. I wasn't suggesting the speed hit was enough to kill the idea - I 
> was just pointing it was something that you would use when correctness and being 
> explicit was considered more important than a small price in speed. And if the 
> name check got optimised out like an assert does. . . Hey, that gives me an idea 
> (see below).
>
>> I just would like
>> to ask a question relating semantics. Supose the following code.
>> 
>> x = 42
>> 
>> def f():
>>   x := 21   #  or x .= 42  I don't remember what you used exactly
>
> Alex used ':=' in a couple of examples, but you'll have to ask him his reasons.
>
> I used '.=' instead mainly because I think colons are ugly, but also because 
> ':=' has the ability to trigger confusion due to its slightly different use in 
> those languages which use it for assignment (Eiffel and Pascal come to mind. . . 
> since Pascal uses it, I guess Delphi does too).

I don't think that would be a big issue. Python uses '=' also
differently from a number of languages. My preference would
currently be for ':=' because I have the impression that if
you don't leave spaces the period in '.=' tends to be obscured.

  x.=42   vs    x:=42

seems a clear win for the second IMO.

-- 
Antoon Pardon


From dima at trit.invalid  Mon Feb  7 20:01:13 2005
From: dima at trit.invalid (Dima Dorfman)
Date: 8 Feb 2005 01:01:13 GMT
Subject: Memory Allocation?
References: <8GCNd.9880$ya6.9761@trndny01>
Message-ID: <slrnd0g3qo.rr1.dima@beaver.trit.org>

On 2005-02-07, Chris S. <chrisks at NOSPAM.udel.edu> wrote:
> Is it possible to determine how much memory is allocated by an arbitrary 
> Python object?

The hardest part about answering this question is figuring out what
you want to count as being allocated for a particular object. That
varies widely depending on why you need this information, which is why
there isn't a "getobsize" or similar call.

For example, consider a dict. The expression

  x = {'alpha': 1, 'beta': 2}

allocates a dict object, a hash table to hold the values [1], and the
strings and integers [2]. So how much memory is used by x? The dict
object structure and hash table obviously belong to x. How about the
contents? Those can be shared. If you count them, the answer is
misleading because deleting that object won't free up that much
memory; but if you don't count them, then your answer isn't very
useful because the large part of the object is probably the contents.
Another possibility is to count how much memory would be released if
the object were to go away, but this requires inspecting the reference
count of every object that can be reached from the subject, and it
might still be wrong if there are cycles.

I expect that if you want to know the size, you can decide on the
semantics you want for your application. The answer might even depend
on your application, since only you know which parts of the object
really counts toward its size (e.g., the names of attributes on your
object probably don't count). But the answer won't be the same for my
application, so a generic "getobsize" doesn't help.

Once you know what you want, it's pretty easy to get an estimate.
You'll have to make some assumptions about Python internals and it
wouldn't be portable across versions. Write a function that dispatches
on the type of its argument. For simple objects, return their basic
size; for containers, return the sum of the basic size, aux storage
size, and sizes of the contents (call your function on each of them).
For any object, the basic size is type(x).__basicsize__. The size of
the auxilary storage depends on the object and probably on the length
of its contents; e.g., a list allocates 4 bytes per element, and a
dict 12 bytes per slot [3]. Many do overallocation, so you have to
account for that too.

The only thing the interpreter can really help with is to be able to
ask an object about how much auxiliary memory it allocated. Only
builtin types can do that, and only that type knows the answer. Having
that would save you from having to know, for example, that a dict
allocates 12 bytes per slot. Everything else doesn't need the
interpreter's support, and pure Python works just as well in your
module as in the standard library (that said, if you do write it, I'm
sure others might find it useful--you aren't the first one with a
desire for this kind of information).

(The above is about CPython. JPython probably has its own set of issues.)

Dima.

[1] Small dicts don't need this extra allocation. We can ignore that
    for now.

[2] Assuming, for the moment, that this isn't a constant expression.
    When it's a constant, the integers are preloaded as constants in
    the code object. Right now, that's an unnecessary complication.

[3] Numbers for CPython 2.4.


From drjonfox at gmail.com  Mon Feb 14 10:37:57 2005
From: drjonfox at gmail.com (drjonfox at gmail.com)
Date: 14 Feb 2005 07:37:57 -0800
Subject: PIG/IP Meeting (Python Interest Group In Princeton) Wed. Feb. 16.
Message-ID: <1108395477.667328.303140@o13g2000cwo.googlegroups.com>

The Python Interest Group In Princeton is a Central New Jersey
discussion and educational group for the Python computer language.

Next Meeting

    What: PIG/IP meeting
    When:  Wed, February 16th, 2005, at 7pm

    Event Description:

        PIG/IP will hold its second meeting on Feb. 16, 2005 at the
Lawrenceville Library (Room #2).  We will be reviewing the Python
Tutorial at http://www.python.org/doc/2.4/tut/tut.html
and then open discussion about Python will be encouraged. Anyone
interested in the Python language is invited to attend.

    Contact Jon Fox at drjonfox at gmail.com for more information.

    Learn more and RSVP at "meetup.org":http://python.meetup.com/156

    More information about the library is
"here":http://www.mcl.org/branches/lawrbr.html.



From ruud<dot>de<dot>jong<at>consunet <dot>  Sun Feb 13 15:36:41 2005
From: ruud<dot>de<dot>jong<at>consunet <dot> (Ruud de Jong)
Date: Sun, 13 Feb 2005 21:36:41 +0100
Subject: For American numbers
In-Reply-To: <1108299336.079209.275420@c13g2000cwb.googlegroups.com>
References: <420e7376$1@nntp0.pdx.net><gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
	<slrnd0u8fd.c2l.nick@irishsea.home.craig-wood.com>
	<1108299336.079209.275420@c13g2000cwb.googlegroups.com>
Message-ID: <420fba52$0$44084$5fc3050@dreader2.news.tiscali.nl>

Dan Bishop schreef:
> Nick Craig-Wood wrote:
> 
>>Peter Hansen <peter at engcorp.com> wrote:
>>
>>> Only for hard drive manufacturers, perhaps.
>>>
>>> For the rest of the computer world, unless I've missed
>>> a changing of the guard or something, "kilo" is 1024
>>> and "mega" is 1024*1024 and so forth...
>>
>>Yes.  Unless you work in the telcoms industry, where, for example if
>>you order a 2 Mbit/s line you'll get
>>
>>  2 * 1024 * 1000 bits / s
> 
> 
> They must have gotten the idea from floppy disks, which also use a
> 1024000-byte "megabyte".
> 

Not really. It is actually related to the bandwidth of individual
telephony speech connections. These channels have a bandwith
of 64 kb/sec, where the k-prefix is used in the proper (SI) way.
So this bandwidth really is exactly 64,000 bits/sec
(8,000 samples/sec, each sample having 8 bits).
The M in a 2Mb/s connection is neither an SI prefix,
noris it identical to Mi. It's just sloppy language.
A 2 Mb/s connection is just a bundling of 32 such 64 kb/s channels,
resulting in a bandwidth of 32*64,000 = 2,048,000 bits/sec.

Cheers,

Ruud


From Scott.Daniels at Acm.Org  Wed Feb 23 09:33:51 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Wed, 23 Feb 2005 06:33:51 -0800
Subject: user interface for python
In-Reply-To: <pan.2005.02.23.09.45.55.878755@thomas-guettler.de>
References: <1109131790.140672.209730@l41g2000cwc.googlegroups.com>
	<pan.2005.02.23.09.45.55.878755@thomas-guettler.de>
Message-ID: <421c9031$1@nntp0.pdx.net>

Thomas Guettler wrote:
> Am Tue, 22 Feb 2005 20:09:50 -0800 schrieb Raghul:
>>   Which of the UI I can used for my program that I can use both in
>>windows and in Linux.
Several.  Tkinter and wxPython are good choices -- they run on the three
major platforms: Linux/unix, Windows, and Mac OS X.

 > I like pygtk. It should be portable to windows, but I have
 > not tried this yet. Up to now I only used it under linux.
I believe this may be a reasonable choice as well.  Another choice is
PyQt, which has a great simple model and definition, but has, I believe,
licensing issues if you intend to deliver a product to many PCs.

>> Is it possible for me to use Wxpython for my program so that it can 
 >> run on both the windows and linux machine?
It is, indeed, possible (and often easy) to have the same program run
well on both platforms.

>> Will it be platform independent?
You can write portable programs (if you test across platforms).   The
only truly portable programs in any language are abstract.  Once you
start dealing with I/O and the real world, you inevitably have to face
issues one circumstance at a time.  Both Tkinter and wxPython spend a
lot of effort in reducing the work you have to do.  Don't fool
yourself with a manager-friendly slogan; programs must be tested to
work.  Any I/O heavy (or threaded, or ....) application running on two
platforms will take more work than on a single platform.  Python and
wxPython or Tkinter, for example, _allow_ you to write portable
programs, but they don't _guarantee_ it.

--Scott David Daniels
Scott.Daniels at Acm.Org


From adomas.paltanavicius at gmail.com  Sat Feb  5 13:32:11 2005
From: adomas.paltanavicius at gmail.com (adomas.paltanavicius at gmail.com)
Date: 5 Feb 2005 10:32:11 -0800
Subject: Alternative to standard C "for"
Message-ID: <1107628331.816935.16760@o13g2000cwo.googlegroups.com>

Hi there,

I am quite new to Python, and have a straight & simple question.
In C, there is for (init; cond; advance). We all know that.
In Python there are two ways to loop over i=A..B (numerical.):
1) i = A
   while i<B:
      ...do something...
      i+=STEP
2) for i in range(A, B, STEP):
     ...do something...

First case looks quite nasty, because it's for more complicated
things, not numerical loops. Second is very nice, but with there's
problem. If i do ..in range(1, 100000000).. (what I really need
sometimes), it takes few hundred megs of memory and slows
down. Are there other good ways for this simple problem? Generators?

Adomas



From nick at craig-wood.com  Fri Feb 11 12:30:01 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 11 Feb 2005 17:30:01 GMT
Subject: Efficient checksum calculating on lagre files
References: <5o2nd2-5hl.ln1@pluto.i.infosense.no>
	<4208E537.4070901@chamonix.reportlab.co.uk>
	<mailman.2199.1107881519.22381.python-list@python.org>
	<slrnd0jm1s.l3u.nick@irishsea.home.craig-wood.com>
	<h0an01ld3j3prpcpmmcok33hena8c6lvm6@4ax.com>
Message-ID: <slrnd0pob3.cd4.nick@irishsea.home.craig-wood.com>

Christos TZOTZIOY Georgiou <tzot at sil-tec.gr> wrote:
>  On 09 Feb 2005 10:31:22 GMT, rumours say that Nick Craig-Wood
> <nick at craig-wood.com> might have written:
> 
> >But you won't be able to md5sum a file bigger than about 4 Gb if using
> >a 32bit processor (like x86) will you?  (I don't know how the kernel /
> >user space VM split works on windows but on linux 3Gb is the maximum
> >possible size you can mmap.)
> 
>  Indeed... but the context was calculating efficiently checksums for large files
>  to be /served/ by a webserver.  I deduce it's almost certain that the files
>  won't be larger than 3GiB, but ICBW :)

You are certainly right ;-)

However I did want to make the point that while mmap is extremely
attractive for certain things, it does limit you to files < 4 Gb which
is something that people don't always realise.

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


From wx at s.ca  Sat Feb 12 23:24:44 2005
From: wx at s.ca (WX)
Date: Sat, 12 Feb 2005 23:24:44 -0500
Subject: writing unicode apps in python - some beginner questions.
Message-ID: <hEAPd.12154$504.1040055@news20.bellglobal.com>

I love Python, and the unicode support is wonderful.

The character set I am using is the Hindi/Devanagari character set at 
unicode range U+901.)

I have TWO newbie questions:

(#1) If I paste some unicode stuff from the clipboard into IDLE, it 
accepts it, but it can't execute a PRINT command like this:

 >>> print u"?????? ??????"
Unsupported characters in input

Should I report this as a bug or is it an essential limitation of the 
Python console/immediate mode?

(#2) Hindi is not displayed correctly on the screen when the 
"Suplemental language support" parts for Windows XP are not installed, 
in particular in the Regional and Languages  Options panel in the 
Control Panel, you have to check "Install files for complex script and 
right-to-left languages (including Thai)".  This adds Thai, and Indic
language support.  Does anyone know a programmatic way in Python to 
check for this,so I can pop up a message telling users that support for 
this script hasn't been installed in Windows?

Regards,

Warren


From alefnula at gmail.com  Thu Feb 17 08:13:02 2005
From: alefnula at gmail.com (Viktor)
Date: 17 Feb 2005 05:13:02 -0800
Subject: Stable GUI + wxPython memory leak
In-Reply-To: <RbCdnauwxveOaY7fRVn-qg@powergate.ca>
References: <c0e7fd79.0502160619.565eb40e@posting.google.com>
	<1108564589.069982.71680@o13g2000cwo.googlegroups.com>
	<1108569376.721830.67370@o13g2000cwo.googlegroups.com>
	<1108596113.424102.255340@f14g2000cwb.googlegroups.com>
	<RbCdnauwxveOaY7fRVn-qg@powergate.ca>
Message-ID: <1108645981.989801.164890@f14g2000cwb.googlegroups.com>

Peter Hansen wrote:
> On which platform?

On Linux, and I'm watching the percentage of used memory with *top* or
*ps v* (I have 256 MB). The aplication started with 19% used and after
45 minutes playing I saw i eat up almost 70%.

I also noticed that:

>>> from Tkinter import *
>>> l = Listbox()
>>> l.pack()
>>> for i in range(200000):
...     l.insert('end', str(i))		# Occupy memory
...
>>> l.delete(0, 'end')			# Free the memory

Doesn't free the memory. The memory stays occupied. OK, when I do the
same thing again, no additional memory is occupied. He uses the same
memory allocated first time, but why doesn't he free it and why memory
isn't fread up even if I explicitly call

>>> l.distroy()
>>> del l
?!

Thank You.



From miki.tebeka at zoran.com  Mon Feb  7 02:57:25 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Mon, 7 Feb 2005 09:57:25 +0200
Subject: def __init__ question in a class definition
In-Reply-To: <1107750187.3795.9.camel@batfink.its.adelaide.edu.au>
References: <1107750187.3795.9.camel@batfink.its.adelaide.edu.au>
Message-ID: <20050207075702.GI3476@zoran.com>

Hello Jeffrey,

> I have an open source program which i am trying to add to.
> 
> class classname(member,member)
> 
> 	def __init__(self,list)
> 		self.__list = list
> 		self.refresh = 360
> 
> my question is what is the __ (double underscore) represent, if
> anything, in this bliock of assignmeents? I wish to add some more names
> but do not know if i need the __ or not?
> 
> IE: is there any special significance to the __ in this case.
http://docs.python.org/tut/tut.html

Bye.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys


From nick at craig-wood.com  Thu Feb 10 06:30:02 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 10 Feb 2005 11:30:02 GMT
Subject: Python and version control
References: <XNrOd.1657$Mw3.72@amstwist00> <cudj6o$s6p$1@n6.co.ru>
Message-ID: <slrnd0me2d.kvs.nick@irishsea.home.craig-wood.com>

Sergei Organov <osv at javad.ru> wrote:
>  Carl <phleum_nospam at chello.se> writes:
> 
>  [...]
> > I am a keen user of Emacs, but version control, which is very simple
> > when you are in a Linux environment, for example, is not a
> > straightforward in Windows.
> 
>  Emacs + CVS (or CVSNT) should work just fine in Windows either.

When I have to edit stuff on windows I use emacs.  Cvs works fine on
windows too.  I haven't tried cvs in emacs on windows, but I suspect
it will work fine as all emacs does is shell out to the cvs binaries.

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


From ncoghlan at iinet.net.au  Wed Feb  2 06:31:37 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Wed, 02 Feb 2005 21:31:37 +1000
Subject: how to separate hexadecimal
In-Reply-To: <7xhdkvbca2.fsf@ruckus.brouhaha.com>
References: <2cad209005020123107fb43105@mail.gmail.com>	<2cad2090050201232427cb97f2@mail.gmail.com>	<420082E4.7020605@iinet.net.au>	<mailman.1738.1107332394.22381.python-list@python.org>
	<7xhdkvbca2.fsf@ruckus.brouhaha.com>
Message-ID: <4200BA19.1010501@iinet.net.au>

Paul Rubin wrote:
> jrlen balane <nbbalane at gmail.com> writes:
> 
>>would i be able to perform bitwise operation with the result?
>>say, i want to get the two's complement of the result, is this correct:
>>
>>twos_complement = (~ hex(hi + lo)) + 1
> 
> 
> You can do bit operations, but hex(n) is the hex string for n, which
> is not what you want.
> 
> If you want the hex form of the two's complement, just say
> 
>    hex(-(hi+lo) & 0xff)
> 
> assuming you want one byte, or
> 
>    hex(-(hi+lo) & 0xffff)
> 
> for two bytes.

More generally though, the "flip the bits and add one" of two's complement is 
just a hardware implementation trick for "2*n - x".

When not working at the hardware level, just go with the definition:

Py> def complement(val, limit=256):
...   if val >= limit or val < 0:
...     raise ValueError("Value out of range for complemented format")
...   if val == 0:
...     return 0
...   return limit - val
...
Py> hex(complement(0x55))
'0xab'
Py> hex(complement(0x55, 256*256))
'0xffab'

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From daniel.dittmar at sap.corp  Mon Feb 28 05:06:56 2005
From: daniel.dittmar at sap.corp (Daniel Dittmar)
Date: Mon, 28 Feb 2005 11:06:56 +0100
Subject: Why do descriptors (and thus properties) only work on
	attributes.
In-Reply-To: <slrnd25pj4.d87.apardon@rcpc42.vub.ac.be>
References: <slrnd25nve.d87.apardon@rcpc42.vub.ac.be>
	<7xoee5kpiv.fsf@ruckus.brouhaha.com>
	<slrnd25pj4.d87.apardon@rcpc42.vub.ac.be>
Message-ID: <cvuqhc$e02$1@news.sap-ag.de>

Antoon Pardon wrote:
>>>Can anyone explain why descriptors only work when they are an attribute
>>>to an object or class.  I think a lot of interesting things one can
>>>do with descriptors would be just as interesting if the object stood
>>>on itself instead of being an attribute to an other object.
>>
>>How would that work?
> 
> 
> Well AFAIU a descriptor is an object with at least one method out of
> __get__, __set__ or __del__. I don see why implicitly calling one
> of these methods would be any more difficult when they are autonomous
> objects than when they are attributes.

I guess properties are really a feature of the class, not of the 
attribute. Certain operations on objects of the class (getattr, setattr, 
delattr) have to be intercepted. If you want to have this for general 
variable access, you 'd have to intercept all accesses to local and 
module name spaces. This slows things down a lot. And many think that 
overloading assignment is a bad idea. You probably find some dicussions 
when searching for "overloading assignment" in the newsgroup archive.

 >>>to an object or class.  I think a lot of interesting things one can

As in the chinese curse "May you live in interisting times"?

Daniel


From fredrik at pythonware.com  Thu Feb 17 03:35:28 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 17 Feb 2005 09:35:28 +0100
Subject: Help with C extensions under VC6 / WinXP and Python 2.4
References: <mailman.2731.1108605453.22381.python-list@python.org><s30811dnlp51u3t1td3s6q0efp7b3m2ma0@4ax.com><mailman.2732.1108608361.22381.python-list@python.org>
	<1108619503.324262.282330@c13g2000cwb.googlegroups.com>
Message-ID: <cv1kql$kqs$1@sea.gmane.org>

Simon John wrote:

> What's the difference between ctypes, SWIG and SIP?
>
> I've used SWIG to "convert" C source to Python (as I believe SIP
> does?), so does ctypes wrap functions from binaries (e.g. DLL's)?

ctypes is a "runtime linker".  it generates bindings on the fly, at runtime,
and doesn't require a separate compilation step.

</F> 





From paul at boddie.org.uk  Sun Feb 20 04:39:16 2005
From: paul at boddie.org.uk (Paul Boddie)
Date: 20 Feb 2005 01:39:16 -0800
Subject: [Fwd: Re: [Uuu-devel] languages] <-- Why Python
References: <mailman.2781.1108677768.22381.python-list@python.org>
	<1108678805.542584.171930@z14g2000cwz.googlegroups.com>
	<mailman.2783.1108679758.22381.python-list@python.org>
	<864qgaisoq.fsf@guru.mired.org>
	<mailman.2785.1108689484.22381.python-list@python.org>
	<86vf8qhcql.fsf@guru.mired.org>
	<mailman.2787.1108691319.22381.python-list@python.org>
	<86r7jdh5vw.fsf@guru.mired.org>
Message-ID: <5339b60d.0502200139.63509594@posting.google.com>

Mike Meyer <mwm at mired.org> wrote in message news:<86r7jdh5vw.fsf at guru.mired.org>...
> Arich Chanachai <macrocosm at fastmail.fm> writes:
> 
> > When the CLR is integrated, it will allow a wide array of problem
> > solving choices for uuu users.
> 
> You've missed the point. Allowing a wide array of problem solving
> choices is a goal, not a means. Instead of concentrating on adding
> langauges, you should be provding an infrastructure that makes adding
> langauges simple.  The Plan 9 example does this best, as any language
> that can do file I/O is supported.

This discussion collides quite nicely with two of the more quoted
articles on software development:

http://primates.ximian.com/~miguel/bongo-bong.html
http://www.jwz.org/doc/groupware.html

The first of which eventually addresses the issue of how programs
communicate with the operating system services and each other,
although I'm sure I've seen a more succinct overview from Mr De Icaza
on that subject. The second brings up the topic of making things
"enterprise-ready" - probably one of the more popular motivations for
introducing something like the CLR into a project which doesn't
necessarily need it and isn't yet familiar with it.

>From what I've seen of Unununium, the motivation for using Python
seems to stem from the way Python's runtime system provides services
which overlap with those of an operating system; programs can
dynamically import code, inspect the properties of such code, and
invoke such code reasonably safely (as opposed to the "jump to this
memory address" model of lower-level runtime systems), although these
features are not unique to Python - the Erlang runtime system is
apparently designed for use at this level, and the Java environment
(and presumably the CLR) provides introspection and dynamic loading
capabilities. I would also imagine that the development of Lisp
operating systems and environments was similarly motivated.

In contrast, the standard UNIX model of interprocess communication and
introspection, extended substantially by Plan 9 and more
conservatively by modern UNIX variants, is said to leave something to
be desired, and those wishing more informative details about the
interfaces exposed by programs and services usually end up putting
something more complicated on top - see the emergence of Bonobo, DCOP
and D-BUS.

Paul


From den at den.den  Fri Feb 11 12:00:08 2005
From: den at den.den (den)
Date: Fri, 11 Feb 2005 18:00:08 +0100
Subject: Alternative to raw_input ?
In-Reply-To: <w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>
References: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>
	<mailman.2400.1108139722.22381.python-list@python.org>
	<w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>
Message-ID: <cuio9f$13k8$1@ns.felk.cvut.cz>

BOOGIEMAN wrote:
> On Fri, 11 Feb 2005 16:35:19 +0000, Simon Brunning wrote:
> 
> 
>>Err, why?
> 
> 
> It looks to ugly this way. I want to press 
> any key without ENTER to continue

Did you try this:

import msvcrt
msvcrt.getch()


From johnleslie at madasafish.com  Fri Feb 11 04:47:01 2005
From: johnleslie at madasafish.com (John Leslie)
Date: 11 Feb 2005 01:47:01 -0800
Subject: passing arguments like -JOB
References: <4412dd31.0502100513.7d7418b@posting.google.com>
	<Xns95F98B4F52031duncanrcpcouk@127.0.0.1>
Message-ID: <4412dd31.0502110147.40577611@posting.google.com>

Thanks...it worked perfectly.
Brilliant!!

JL


Duncan Booth <duncan.booth at invalid.invalid> wrote in message news:<Xns95F98B4F52031duncanrcpcouk at 127.0.0.1>...
> John Leslie wrote:
> 
> > I am porting a script from Korn Shell to python and want to pass named
> > parameters like -JOB 123456 -DIR mydir
> > 
> > I can get it to work passing --JOB and --DIR but not -JOB and -DIR
> > 
> > Any ideas?
> > 
> Unfortunately (for you), I think you will find most or all of the existing 
> ways to parse command line options in Python follow the POSIX convention 
> for arguments, i.e. single letter options are introduced with a single - 
> and multi-letter options are introduced with --.
> 
> My guess is that if you can't change whatever generates the command lines 
> to conform to this convention you will have to write your own code to do 
> the processing.
> 
> Alternatively you might get by by hacking the command line in your Python 
> code:
> 
>    for i, opt in enumerate(sys.argv):
>        if opt in ('-JOB','-DIR', '-ERR', '-GRP', '-TST', '-JNM', '-DAT'):
>           sys.argv[i] = '-'+opt
> 
>    ... and then use getopt or optparse here ...
> 
> It isn't pretty, but so long as those values don't turn up elsewhere in the 
> command line it ought to work.


From deetsNOSPAM at web.de  Mon Feb 28 06:36:26 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 28 Feb 2005 12:36:26 +0100
Subject: Explicit or general importing of namespaces?
References: <1109588238.491145.52060@l41g2000cwc.googlegroups.com>
	<38gc2tF5o34sbU1@individual.net>
	<cvuu66$jvu$1@gemini.csx.cam.ac.uk>
Message-ID: <38gdtoF5jmn5jU1@individual.net>

> Actually, if you are using a name in another module repeatedly
> in an inner loop, it can make a big difference if you have to lookup
> the name in the module repeatedly. In that case, just explicitly
> import the name you want to use repeatedly:

Ok - but if that really hits the wall for some part of the code,
 then you'd most probably even go for a local variable binding to avoid the
lookups in the different scopes - thus the issue of import format gets
unimportant again :)

-- 
Regards,

Diez B. Roggisch


From administrata at hotmail.com  Sun Feb  6 15:06:03 2005
From: administrata at hotmail.com (administrata)
Date: 6 Feb 2005 12:06:03 -0800
Subject: Error!
References: <614c778e.0502041459.39da55c1@posting.google.com>
	<1107563070.861085.180680@g14g2000cwa.googlegroups.com>
Message-ID: <614c778e.0502061206.273db95e@posting.google.com>

"John Machin" <sjmachin at lexicon.net> wrote in message news:<1107563070.861085.180680 at g14g2000cwa.googlegroups.com>...
> administrata wrote:
> > I'm programming Car Salesman Program.
> > It's been "3 days" learning python...
> 
> >From whom or what book or what tutorial?
> 
> > But, i got problem
> 
> You got problemS. What Jeff & Brian wrote, plus:
> 
> You have "change" instead of "charge".
> 
> You forgot to add in the base price -- "actual price" according to you
> comprises only the taxes and fees. Where is your car yard? We'd each
> like to order a nice shiny red Ferrari :-)
> 
> Cheers,
> John

Thx 4 helps everyone! :)


From nick at craig-wood.com  Sun Feb 13 05:30:01 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 13 Feb 2005 10:30:01 GMT
Subject: For American numbers
References: <420e7376$1@nntp0.pdx.net> <gOOdnTVZnaa-V5PfRVn-3w@powergate.ca>
Message-ID: <slrnd0u8fd.c2l.nick@irishsea.home.craig-wood.com>

Peter Hansen <peter at engcorp.com> wrote:
>  Only for hard drive manufacturers, perhaps.
> 
>  For the rest of the computer world, unless I've missed
>  a changing of the guard or something, "kilo" is 1024
>  and "mega" is 1024*1024 and so forth...

Yes.  Unless you work in the telcoms industry, where, for example if
you order a 2 Mbit/s line you'll get

  2 * 1024 * 1000 bits / s

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


From mwm at mired.org  Tue Feb  8 22:28:57 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 08 Feb 2005 21:28:57 -0600
Subject: An Ode To My Two Loves
References: <mailman.1982.1107624858.22381.python-list@python.org>
	<slrnd0cn2e.rr5.jgrahn-nntq@frailea.sa.invalid>
	<cu9usa$180$1@swifty.westend.com> <8665128pkv.fsf@guru.mired.org>
	<cubtr4$1nh$1@panix2.panix.com>
Message-ID: <861xbq8l8m.fsf@guru.mired.org>

aahz at pythoncraft.com (Aahz) writes:

> In article <8665128pkv.fsf at guru.mired.org>, Mike Meyer  <mwm at mired.org> wrote:
>>
>>COM is dominant on Windows because MS pushes it. CORBA isn't dominant
>>on Unix because there are a slew of extensible/embeddable languages to
>>pick from instead - assuming the apps in question came up with a
>>solution better than rolling their own. See <URL:
>>http://www.mired.org:8080/home/mwm/scripting/ > for my thoughts on the
>>matter before I learned better.
>
> "Unable to connect to host"

My bad. That should be http://www.mired.org/home/mwm/scripting/ .

   <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From tzot at sil-tec.gr  Tue Feb  8 11:34:45 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Tue, 08 Feb 2005 18:34:45 +0200
Subject: Efficient checksum calculating on lagre files
References: <5o2nd2-5hl.ln1@pluto.i.infosense.no>
	<mailman.2195.1107879304.22381.python-list@python.org>
Message-ID: <raqh01hnnng4a8p7lnag7kvq6qfqbg8mpq@4ax.com>

On Tue, 08 Feb 2005 16:13:43 +0000, rumours say that Robin Becker
<robin at reportlab.com> might have written:

>Ola Natvig wrote:
>> Hi all
>> 
>> Does anyone know of a fast way to calculate checksums for a large file. 
>> I need a way to generate ETag keys for a webserver, the ETag of large 
>> files are not realy nececary, but it would be nice if I could do it. I'm 
>> using the python hash function on the dynamic generated strings (like in 
>> page content) but on things like images I use the shutil's 
>> copyfileobject function and the hash of a fileobject's hash are it's 
>> handlers memmory address.
>> 
>> Does anyone know a python utility which is possible to use, perhaps 
>> something like the md5sum utility on *nix systems.
>> 
>> 
>well md5sum is usable on many systems. I run it on win32 and darwin.

[snip use of some md5sum.exe]

Why not use the md5 module?

The following md5sum.py is in use and tested, but not "failproof".

|import sys, os, md5
|from glob import glob
|
|for arg in sys.argv[1:]:
|    for filename in glob(arg):
|        fp= file(filename, "rb")
|        md5sum= md5.new()
|        while True:
|            data= fp.read(65536)
|            if not data: break
|            md5sum.update(data)
|        fp.close()
|        print md5sum.hexdigest(), filename

It's fast enough, especially if you cache results.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From ncoghlan at iinet.net.au  Fri Feb 11 07:19:01 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Fri, 11 Feb 2005 22:19:01 +1000
Subject: namespaces module (a.k.a. bunch, struct, generic object, etc.)
 PEP
In-Reply-To: <GaudndOHLML3M5bfRVn-vg@comcast.com>
References: <GaudndOHLML3M5bfRVn-vg@comcast.com>
Message-ID: <420CA2B5.9070005@iinet.net.au>

Steven Bethard wrote:
> In the "empty classes as c structs?" thread, we've been talking in some 
> detail about my proposed "generic objects" PEP.  Based on a number of 
> suggestions, I'm thinking more and more that instead of a single 
> collections type, I should be proposing a new "namespaces" module 
> instead.  Some of my reasons:
> 
> (1) Namespace is feeling less and less like a collection to me.  Even 
> though it's still intended as a data-only structure, the use cases seem 
> pretty distinct from other collections.

Particularly since the collections module is billed as a location for 
purpose-specific optimised data structures where some general-purpose features 
have been dropped in order to make other aspects faster.

All the ideas here relate to conveniently manipulating namespaces, and are 
independent enough to make sense as separate classes. I think a new module is a 
good call.

It also allows a Python implementation :)

>     >>> ns = Namespace(eggs=1)
>     >>> Namespace.update(ns, [('spam', 2)], ham=3)
>     >>> ns
>     Namespace(eggs=1, ham=3, spam=2)
> 
> Note that update should be used through the class, not through the
> instances, to avoid the confusion that might arise if an 'update'
> attribute added to a Namespace instance hid the update method.

I'd like to see the PEP text itself encourage the more inheritance friendly 
style used in the __init__ method:
   type(ns).update(ns, [('spam', 2)], ham=3)

Accessing the class directly means that you may get incorrect behaviour if ns is 
actually an instance of a subclass of Namespace that overrides update.

It may also be worth mentioning that the standard library applies this technique 
in order to reliably access the magic methods of an instance's type, rather than 
the versions shadowed in the instance (this is important when trying to pickle 
or copy instances of 'type' for example).

> Note that support for the various mapping methods, e.g.
> __(get|set|del)item__, __len__, __iter__, __contains__, items, keys,
> values, etc. was intentionally omitted as these methods did not seem
> to be necessary for the core uses of an attribute-value mapping.  If
> such methods are truly necessary for a given use case, this may
> suggest that a dict object is a more appropriate type for that use.

The 'vars' builtin also makes it trivial to use dictionary style operations to 
manipulate the contents of a Namespace.

>     class Namespace(object):
>         def __eq__(self, other):
>             """x.__eq__(y) <==> x == y
> 
>             Two Namespace objects are considered equal if they have the
>             same attributes and the same values for each of those
>             attributes.
>             """
>             return (other.__class__ == self.__class__ and
>                     self.__dict__ == other.__dict__)

Hmm, the exact class check strikes me as being rather strict. Although I guess 
it makes sense, as the loose check is easily spelt:
   if vars(ns1) == vars(ns2): pass

*shrug* I'll let other people argue about this one :)

>         def update(*args, **kwargs):
>             """Namespace.update(ns, [ns|dict|seq,] **kwargs) -> None

Same comment as above about encouraging the inheritance friendly style.

> Open Issues
> ===========
> What should the types be named?  Some suggestions include 'Bunch',
> 'Record', 'Struct' and 'Namespace'.
> Where should the types be placed?  The current suggestion is a new
> "namespaces" module.

If there aren't any objections to the current answers to these questions in this 
thread, you may finally get to move them to a 'Resolved Issues' section :)

> Should namespace chaining be supported?  One suggestion would add a
> NamespaceChain object to the module::

This does have the advantage of keeping the basic namespace simple. However, it 
may also be worth having native chaining support in Namespace:

     class Namespace(object):
         def __init__(*args, **kwds):
             if not 1 <= len(args) <= 3:
                 raise TypeError('expected 1 to 3 non-keyword arguments,'
                                 'got %i' % len(args))
             self = args[0]
             # Set __fallback__ first, so keyword arg can override
             if len(args) > 2:
                 self.__fallback__ = args[2]
             else:
                 self.__fallback__ = None
             # Update __dict__. OK to use normal method calls, since dict hasn't
             # been updated yet
             if len(args) > 1 and args[1] is not None:
                 self.update(args[1], **kwds)
             elif kwds:
                 self.update(**kwds)

         def __getattr__(self, attr):
             if self.__fallback__ is not None:
                 return getattr(self.__fallback__, attr)
             raise AttributeError("No attribute named " + attr)

         # Otherwise unchanged



>     class NamespaceChain(object):
>         """NamespaceChain(*objects) -> new attribute lookup chain
> 
>         The new NamespaceChain object's attributes are defined by the
>         attributes of the provided objects.  When an attribute is
>         requested, the sequence is searched sequentially for an object
>         with such an attribute.  The first such attribute found is
>         returned, or an AttributeError is raised if none is found.
> 
>         Note that this chaining is only provided for getattr and delattr
>         operations -- setattr operations must be applied explicitly to
>         the appropriate objects.

Hmm, I'm not so sure about this. I think that the right model is the way that a 
class instance is currently chained with its class.

That is, assume we have the following:
   c = cls()
   ns = Namespace(vars(c), vars(cls)) # Using modified NS above
   nc = NamespaceChain(Namespace(vars(c)), Namespace(vars(cls)))


I would expect modification of attributes on ns or nc to behave similarly to 
modification of attributes on c - attribute retrieval follows the chain, but 
attribute modification (set/del) always operates on the first namespace in the 
chain.

Cheers,
Nick.
-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From matt at pollenation.net  Mon Feb 21 09:52:10 2005
From: matt at pollenation.net (Matt Goodall)
Date: Mon, 21 Feb 2005 14:52:10 +0000
Subject: recommended way of generating HTML from Python
In-Reply-To: <4219d2a5$1_1@newspeer2.tds.net>
References: <1108889625.068929.88890@z14g2000cwz.googlegroups.com>
	<4218f506$0$1220$8fcfb975@news.wanadoo.fr>
	<1108965380.059565.200110@g14g2000cwa.googlegroups.com>
	<4219d2a5$1_1@newspeer2.tds.net>
Message-ID: <1108997530.6685.91.camel@localhost.localdomain>

On Mon, 2005-02-21 at 07:36 -0500, Kent Johnson wrote:
> Michele Simionato wrote:
> > The problem is a problem of standardization, indeed. There plenty of
> > recipes to
> > do the same job, I just would like to use a blessed one (I am teaching
> > a Python
> > course and I do not know what to recommend to my students).
> 
> Why not teach your students to use a template system?
> 
> > FWIW, here is a my version of the recipe (stripped down to the bare
> > essentials)
> > 
> > .def makeattr(dict_or_list_of_pairs):
> > .    dic = dict(dict_or_list_of_pairs)
> > .    return " ".join("%s=%r" % (k, dic[k]) for k in dic)
> > 
> > .class HTMLTag(object):
> > .    def __getattr__(self, name):
> > .        def tag(value, **attr):
> > .            """value can be a string or a sequence of strings."""
> > .            if hasattr(value, "__iter__"): # is iterable
> > .                value = " ".join(value)
> > .            return "<%s %s>%s</%s>\n" % (name, makeattr(attr), value,
> > name)
> > .        return tag
> > 
> > # example:
> > .html = HTMLTag()
> > 
> > .tableheader = ["field1", "field2"]
> > .tablebody = [["a1", "a2"],
> > .         ["b1", "b2"]]
> > 
> > .html_header = [html.tr(html.th(el) for el in tableheader)]
> > .html_table = [html.tr(html.td(el) for el in row) for row in tablebody]
> > .print html.table(html_header + html_table)
> 
> *Shudder*
> 
> I've written web pages this way (using a pretty nice Java HTML generation package) and I don't 
> recommend it. In my experience, this approach has several drawbacks:
> - as soon as the web page gets at all complex, the conceptual shift from HTML to code and back is 
> difficult.
> - It is hard to work with a designer. The designer will give you sample web pages which then have to 
> be hand-translated to code. Changes to the web page have to be located in the code.
> - There is no separation of content and presentation

Slightly off topic but, just to be clear, Nevow supports XHTML templates
*and* stan tag expressions.  Both are useful. As a general rule, I stick
to XHTML templates but I use stan for prototyping pages and when marking
up the XHTML templates gets so complicated that they might as well be
written in Python anyway.

Also, just because the HTML code is not in a .html file does not
necessarily mean that content and presentation are mixed up. For
instance, with stan (and probably the alternatives mentioned in this
thread) it's very easy to build a tag library that the "real" Python
code simply calls on to render page content.

> 
> IMO templating systems are a much better solution. They let you express HTML in HTML directly; you 
> communicate with a designer in a language the designer understands; you can separate content and 
> presentation.

Agreed. Although I would go further and say that it's important to
choose a templating system that allows the Python developer to annotate
XHTML templates using **valid XML**, i.e. no "for x in y" loops, no "if
foo" conditionals, no "i = 0" variable setting, no expression
evaluations, etc.


<advocacy>
The lovely thing about Nevow is that it encourages good separation -
HTML is HTML and logic is Python, as it should be - but does not get in
the way when breaking the rules is necessary or just a lot easier.
</advocacy>


Cheers, Matt

-- 
     __
    /  \__     Matt Goodall, Pollenation Internet Ltd
    \__/  \    w: http://www.pollenation.net
  __/  \__/    e: matt at pollenation.net
 /  \__/  \    t: +44 (0)113 2252500
 \__/  \__/
 /  \          Any views expressed are my own and do not necessarily
 \__/          reflect the views of my employer.



From steve at holdenweb.com  Tue Feb 15 11:36:49 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 15 Feb 2005 16:36:49 +0000
Subject: keeping a COM server alive
In-Reply-To: <42109641$0$6592$8fcfb975@news.wanadoo.fr>
References: <1108382003.358573.132710@c13g2000cwb.googlegroups.com>
	<42109641$0$6592$8fcfb975@news.wanadoo.fr>
Message-ID: <42122521.6050707@holdenweb.com>

Do Re Mi chel La Si Do wrote:

> Hi !
> 
> I had also make a Python-COM-server.
> But, when I launch several clients, I obtain several instances of my
> COM-server.
> 
> Finally, there are advantages and disadvantages in this established fact.
> But I can't use this way for to exchange data between several clients. For
> that, I use a TCP local server.
> 
There are settings you can establish to determine the interactions 
between the COM server and its clients (threading model, in-process or 
out-of-process, etc).

If you don't get an answer on this list, try python-win32 at python.org as 
a list where the readers will be more directly in tune with your needs.

regards
  Steve



From donn at u.washington.edu  Wed Feb 23 17:54:12 2005
From: donn at u.washington.edu (Donn Cave)
Date: Wed, 23 Feb 2005 14:54:12 -0800
Subject: select + ssl
References: <cvilj2$p8u$1@aphrodite.grec.isp.9tel.net>
Message-ID: <donn-733328.14541223022005@gnus01.u.washington.edu>

In article <cvilj2$p8u$1 at aphrodite.grec.isp.9tel.net>,
 Ktm <ktm-void at altern.org> wrote:

> I don't have the same behaviour with two codes who are quite the same,
> one using SSL, the other not. I tested the programs with stunnel and
> telnet , respectively.

[... program source ...]

> The server blocks on recv here.

SSL is a layer on top of the socket.  It reads and writes
SSL protocol data on the socket connection, while its
recv() and send() methods return and accept the unencrypted
protocol payload (you already knew this.)

The select() function does not however deal with this layer,
it looks directly at the socket.  It's telling you that recv()
won't block -- but it means the recv(2) that SSL uses, not
the SSL.Connection.recv() that you have to use.

> In both case I don't send anything with the client. (Perhaps stunnel
> send something that I don't see ?)
> 
> Why does the server block ?

Probably you're seeing the initial exchange of data during
the SSL connection - certificates and so forth.  You may
find that after this is done, further exchanges will work
OK with select().  Or maybe not -- I really don't know enough
about SSL to predict this.

   Donn Cave, donn at u.washington.edu


From tjreedy at udel.edu  Sun Feb 27 16:36:57 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 27 Feb 2005 16:36:57 -0500
Subject: Problem When Unit Testing with PMock
References: <1109423274.660110.156140@f14g2000cwb.googlegroups.com><mailman.3095.1109443491.22381.python-list@python.org>
	<1109483520.813509.171880@f14g2000cwb.googlegroups.com>
Message-ID: <cvte9d$4t8$1@sea.gmane.org>


<steven at lczmsoft.com> wrote in message 
news:1109483520.813509.171880 at f14g2000cwb.googlegroups.com...
>> def mockit(): raise StopIteration

This was meant to be a generator function.  Peter corrected my error in 
leaving out a never reached yield to make it so.  My apologies.  Putting if 
False: yield None as the first line in the function has same effect.

> but it behaviors differenctly when pass in a mockit()  and pass in an
> iterator with empty.  so i think the code emulates nothing.

I hope Peter's addition clarifies and improves the situation.  My idea 
was/is that an iterator comsumer should be tested with an empty iterator.

>> def intit(k):
>>  for i in range(k): yield i
>
> Now you mean define my own iteration without the help of pmock.

That was also my intention above.  'mockit' was just a name, this could be 
'mockintit'.

> there are still so many other methods in the iterator for pass in,

I don't understand this.  An iterator only has a trivial .__iter__ method 
and a usually nontrivial .next method.  A generator function makes it easy 
to create as many iterators as you need.

> have to mock them one by one totally manually, its boring and thats the
> reason why i want pmock.

I am not familiar with pmock, but my impression is that mock objects are 
for objects that you may not have available, such as a connection to a 
database or file or instance of an umimplemented class ;-).  For such 
objects, the mock-ness consists in returning canned rather than actual 
fetched or calculated answers.  Iterators, on the other hand, are almost as 
easily available as ints, lists, etc.  Anything with the interator 
interface and behavior *is* an interator, though you could make one yield 
mock objects.   Do as you wish once you understand whatever choices pmock 
gives you.

Terry J. Reedy





From russblau at hotmail.com  Mon Feb  7 11:03:20 2005
From: russblau at hotmail.com (Russell Blau)
Date: Mon, 7 Feb 2005 11:03:20 -0500
Subject: Questions about mathematical signs...
References: <614c778e.0502061226.5f40244c@posting.google.com><mailman.2031.1107722589.22381.python-list@python.org>
	<1107751594.529913.105480@c13g2000cwb.googlegroups.com>
Message-ID: <cu83e5$3ld$1@sea.gmane.org>

"Dan Bishop" <danb_83 at yahoo.com> wrote in message
news:1107751594.529913.105480 at c13g2000cwb.googlegroups.com...
> Jeff Epler wrote:
> > On Sun, Feb 06, 2005 at 12:26:30PM -0800, administrata wrote:
> > > Hi! I'm programming maths programs.
> > > And I got some questions about mathematical signs.
> ...
> > > 2. Inputing fractions like (a / b) + (c / d), It's tiring work too.
> > >    Can it be simplified?
> >
> > Because of the rules of operator precedence,
> >     a / b + c / d
> > has the same meaning as the expression you gave.
>
> And it's important to note that that meaning will change in version
> 3.0.  Until then, it's best to start every module with "from __future__
> import division".

You're right, of course, but that's like offering advice about how to shift
gears on a bicycle to someone who hasn't even figured out where the pedals
are yet!  ;-)


-- 
I don't actually read my hotmail account, but you can replace hotmail with
excite if you really want to reach me.





From macrocosm at fastmail.fm  Thu Feb 17 16:59:35 2005
From: macrocosm at fastmail.fm (Arich Chanachai)
Date: Thu, 17 Feb 2005 16:59:35 -0500
Subject: [Fwd: Re: [Uuu-devel] languages]  <-- Why Python
Message-ID: <421513C7.2090906@fastmail.fm>

I consider this to be a good question. I just started to learn Python 
and I like it. I don't know about Lisp however...

The problem, IMHO, in creating a new language is that we are losing code 
reusability... we will be able to port python applications very easily...

I don't have a clear idea on this, but I'm sticking to Python until someone 
decides to replace it ;-)

----- Original Message ----- 
From: "Richard Taytor" <dick at gutz.com>
To: <uuu-devel at unununium.org>
Sent: Thursday, February 17, 2005 4:28 PM
Subject: [Uuu-devel] languages


> First, thank you for Unununium. I first learned of the project years ago 
> and I'm happy to see it is alive and well.
>
> I'm curious: For the same reasons cited for using Python, why not use 
> Lisp? I understand that Python is more popular/pervasive, but if reducing 
> the cognitive load on the programmers, increasing the elegance and 
> efficiency between programmer and code, &c., is of primary concern, Lisp 
> (or as mentioned in the documentation, creating a new language) seems a 
> better choice (as it appears to me). What do you think?
>
> _______________________________________________
> Uuu-devel mailing list
> Uuu-devel at unununium.org
> http://unununium.org/cgi-bin/mailman/listinfo/uuu-devel 


_______________________________________________
Uuu-devel mailing list
Uuu-devel at unununium.org
http://unununium.org/cgi-bin/mailman/listinfo/uuu-devel



From mahs at telcopartners.com  Sun Feb  6 12:13:50 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sun, 06 Feb 2005 09:13:50 -0800
Subject: How do I convert arithemtic string (like "2+2") to a number?
In-Reply-To: <871xbtiwsf.fsf@pobox.com>
References: <mailman.1996.1107640917.22381.python-list@python.org>	<1107641467.104883.177850@c13g2000cwb.googlegroups.com>	<mailman.2010.1107673611.22381.python-list@python.org>	<1107674970.152776.164170@c13g2000cwb.googlegroups.com>	<36m92pF52msqlU1@individual.net>	<1107687633.712157.142040@g14g2000cwa.googlegroups.com>
	<871xbtiwsf.fsf@pobox.com>
Message-ID: <cu5j1e$tti$1@sea.gmane.org>

John J. Lee wrote:
> "Adomas" <adomas.paltanavicius at gmail.com> writes:
> 
> 
>>Well, a bit more secure would be
>>
>>eval(expression, {'__builtins__': {}}, {})
>>
>>or alike.
> 
> 
> Don't believe this without (or even with ;-) very careful thought,
> anyone.  Google for rexec.
> 
> 
> John
This module provides a more systematic way to set up restricted evaluation:


"""Restricted evaluation

     Main entry point: r_eval()
     For usage see class tests or run them using testall()"""


import types
import compiler
import operator

import sys, os # used only for testing

ast = compiler.ast

class Eval_Error(Exception):
     def __init__(self,error,descr = None,node = None):
         self.error = error
         self.descr = descr

     def __repr__(self):
         return "%s: %s" % (self.error, self.descr)
     __str__ = __repr__


class AbstractVisitor(object):
     """Standard depth-first AST walker - dispatches to methods
         based on Node class name"""
     def __init__(self):
         self._cache = {} # dispatch table

     def visit(self, node,**kw):
         if node is None: return None
         cls = node.__class__
         meth = self._cache.setdefault(cls,
             getattr(self,'visit'+cls.__name__,self.default))
         return meth(node, **kw)

     def default(self, node, **kw):
         for child in node.getChildNodes():
             return self.visit(child, **kw)
     visitExpression = default



class Eval(AbstractVisitor):
     """An AST walker that implements a replacement to built-in eval.

     See r_eval for entry point/usage.

     Provides hooks for managing name resolution, proxying objects,
     and controlling attribute access

     Does not implement:
         List Comprehensions, Generator Expressions, Lambda
         Ellipsis (can this be used without numpy?)
     """
     def __init__(self, context = globals()):
         super(Eval,self).__init__()
         self.context = context

     # Namespace interface.  Safe implementations should override these methods
     # to implement restricted evaluation.  This implementation simply
     # evals the name in self.context and provides no proxying or
     # attribute lookup restrictions

     def lookup(self, objname):
         """Called only by visitName.  Raise an exception here
         to prevent any direct name resolution, but note that
         objects may be returned by callables or attribute lookups"""
         return eval(objname, self.context)

     def getObject(self, obj):
         """Called by all name resolvers and by CallFunc.  Provides
         a hook for proxying unsafe objects"""
         return obj

     def getAttribute(self,obj,attrname):
         """Called by visitGetattr"""
         return getattr(obj,attrname)

     # End Namespace interface


     # Syntax nodes follow by topic group.  Delete methods to disallow
     # certain syntax.

     # Object constructor nodes
     def visitConst(self, node, **kw):
         return node.value
     def visitDict(self,node,**kw):
         return dict([(self.visit(k),self.visit(v)) for k,v in node.items])
     def visitTuple(self,node, **kw):
         return tuple(self.visit(i) for i in node.nodes)
     def visitList(self,node, **kw):
         return [self.visit(i) for i in node.nodes]
     def visitSliceobj(self,node,**kw):
         return slice(*[self.visit(i) for i in node.nodes])
     def visitEllipsis(self,node,**kw):
         raise NotImplementedError, "Ellipsis"

     # Binary Ops
     def visitAdd(self,node,**kw):
         return self.visit(node.left) + self.visit(node.right)
     def visitDiv(self,node,**kw):
         return self.visit(node.left) / self.visit(node.right)
     def visitFloorDiv(self,node,**kw):
         return self.visit(node.left) // self.visit(node.right)
     def visitLeftShift(self,node,**kw):
         return self.visit(node.left) << self.visit(node.right)
     def visitMod(self,node,**kw):
         return self.visit(node.left) % self.visit(node.right)
     def visitMul(self,node,**kw):
         return self.visit(node.left) * self.visit(node.right)
     def visitPower(self,node,**kw):
         return self.visit(node.left) ** self.visit(node.right)
     def visitRightShift(self,node,**kw):
         return self.visit(node.left) >> self.visit(node.right)
     def visitSub(self,node,**kw):
         return self.visit(node.left) - self.visit(node.right)

     # Unary ops
     def visitNot(self,node,*kw):
         return not self.visit(node.expr)
     def visitUnarySub(self,node,*kw):
         return -self.visit(node.expr)
     def visitInvert(self,node,*kw):
         return ~self.visit(node.expr)
     def visitUnaryAdd(self,node,*kw):
         return +self.visit(node.expr)

     # Logical Ops
     def visitAnd(self,node,**kw):
         return reduce(lambda a,b: a and b,[self.visit(arg) for arg in node.nodes])
     def visitBitand(self,node,**kw):
         return reduce(lambda a,b: a & b,[self.visit(arg) for arg in node.nodes])
     def visitBitor(self,node,**kw):
         return reduce(lambda a,b: a | b,[self.visit(arg) for arg in node.nodes])
     def visitBitxor(self,node,**kw):
         return reduce(lambda a,b: a ^ b,[self.visit(arg) for arg in node.nodes])
     def visitCompare(self,node,**kw):
         comparisons = {
             "<": operator.lt, # strictly less than
             "<=": operator.le,# less than or equal
             ">": operator.gt, # strictly greater than
             ">=": operator.ge, # greater than or equal
             "==": operator.eq, # equal
             "!=": operator.ne, # not equal
             "<>": operator.ne, # not equal
             "is": operator.is_, # object identity
             "is not": operator.is_not # negated object identity
             }
         obj = self.visit(node.expr)
         for op, compnode in node.ops:
             compobj = self.visit(compnode)
             if not comparisons[op](obj, compobj):
                 return False
             obj  = compobj
         return True
     def visitOr(self,node,**kw):
         return reduce(lambda a,b: a or b,[self.visit(arg) for arg in node.nodes])


     # Name resolution
     def visitGetattr(self,node,**kw):
         obj = self.visit(node.expr)
         return self.getAttribute(obj,node.attrname)

     def visitName(self,node, **kw):
         return self.lookup(node.name)

     def visitSlice(self,node,**kw):
         obj = self.visit(node.expr)
         objslice = obj[self.visit(node.lower):self.visit(node.upper)]
         return self.getObject(objslice)

     def visitSubscript(self,node,**kw):
         obj = self.visit(node.expr)
         subs = node.subs
         if len(subs) > 1:
             raise NotImplementedError, "Subscript must be integer or slice"
         assert node.flags == "OP_APPLY"
         return self.getObject(operator.getitem(obj,self.visit(subs[0])))


     # Callables
     def visitCallFunc(self,node,**kw):
         func = self.visit(node.node)

         args = node.args
         kwargs = self.visit(node.dstar_args) or {}
         posargs = []
         for arg in node.args:
             if isinstance(arg, ast.Keyword):
                 keyword, value = self.visit(arg)
                 if keyword in kwargs:
                     raise TypeError, "%s() got multiple values for keyword 
argument '%s'" \
                             % (func,keyword)
                 kwargs[keyword] = value
             else:
                 posargs.append(self.visit(arg))
         posargs.extend(node.star_args or [])

         return self.getObject(func(*posargs,**kwargs))

     def visitKeyword(self,node,**kw):
         return node.name, self.visit(node.expr)

     # Miscellaneous

     def visitBackquote(self, node, **kw):
         return repr(self.visit(node.expr))

     # Function/class definition

     def visitLambda(self, node, **kw):
         raise NotImplementedError, "Lambda"

     # Iterator evaluations

     def visitGenExpr(self,node,*kw):
         raise NotImplemetedError, "GenExpr"
     def visitListComp(self,node,*kw):
         raise NotImplemetedError, "ListComp"

     # Some unexpected node type
     def default(self, node, **kw):
         raise Eval_Error("Unsupported source construct",
                                 node.__class__,node)




def r_eval(source, context = None):
     """eval partial replacement,

         Does not implement:
         List Comprehensions, Generator Expressions, Lambda. Ellipsis

         """

     walker = Eval(context or globals())
     try:
         ast = compiler.parse(source,"eval")
     except SyntaxError, err:
         raise
     try:
         return walker.visit(ast)
     except Eval_Error, err:
         raise


class tests(object):

     def run(self):
         """Run all the tests"""
         for name in dir(self):
             if name.startswith("test_"):
                 getattr(self,name)()
                 print "%s: OK" % name

     def test_const(self):
         cases = ["""[1, 2, 'Joe Smith', 8237972883334L,   # comment
       {'Favorite fruits': ['apple', 'banana', 'pear']},  # another comment
       'xyzzy', [3, 5, [3.14159, 2.71828, []]]]"""]
         for case in cases:
             assert eval(case) == r_eval(case)

     def test_algebra(self):
         """Show that r_eval matches eval on constant expressions"""
         cases = [
             "1+2/3 * 4.0 ** 5 % 2",
             "(4 << 2 | 67 >> 2) ^ 0xFF",
             ]
         for case in cases:
             assert eval(case) == r_eval(case)
     def test_names(self):
         cases = [
             "sum",
             "sys.modules['os']",
             ]
         for case in cases:
             assert eval(case) == r_eval(case)

     def test_calling(self):
         cases = [
             "getattr(object, 'subclasses'.join(['_'*2]*2))",
             "type('Name', dict = {'a':1}, bases = (object,)).a",
             "type(**dict(dict = {'a':1}, name = 'Name', bases = (object,))).a"
             ]
         for case in cases:
             assert eval(case) == r_eval(case)


def testall():
     tests().run()



From rory at campbell-lange.net  Fri Feb 18 12:10:46 2005
From: rory at campbell-lange.net (Rory Campbell-Lange)
Date: Fri, 18 Feb 2005 17:10:46 +0000
Subject: Newbie CGI problem
Message-ID: <20050218171046.GA11105@campbell-lange.net>

#!/usr/bin/python
import cgi
print "Content-type: text/html\n\n"
print "hi"

Gives me the following in my browser:

'''
hi
Content-type: text/html


hi
'''

Why are there two 'hi's?

Thanks,
Rory
-- 
Rory Campbell-Lange 
<rory at campbell-lange.net>
<www.campbell-lange.net>


From aurora00 at gmail.com  Tue Feb  1 14:57:22 2005
From: aurora00 at gmail.com (aurora)
Date: Tue, 01 Feb 2005 11:57:22 -0800
Subject: Printing Filenames with non-Ascii-Characters
References: <36a3ikF4uk8r0U1@individual.net>
Message-ID: <opslja1wpv6yt6e7@news.cisco.com>

On Tue, 01 Feb 2005 20:28:11 +0100, Marian Aldenh?vel  
<marian at mba-software.de> wrote:

> Hi,
>
> I am very new to Python and have run into the following problem. If I do
> something like
>
>    dir = os.listdir(somepath)
>    for d in dir:
>       print d
>       		
> The program fails for filenames that contain non-ascii characters.
>
>    'ascii' codec can't encode characters in position 33-34:
>
> I have noticed that this seems to be a very common problem. I have read  
> a lot
> of postings regarding it but not really found a solution. Is there a  
> simple
> one?

English windows command prompt uses cp437 charset. To print it, use

   print d.encode('cp437')

The issue is a terminal only understand certain character set. If you have  
unicode string, like d in your case, you have to encode it before it can  
be printed. (We really need native unicode terminal!!!) If you don't  
encode, Python will do it for you. The default encoding is ASCII. Any  
string that contains non-ASCII character will give you trouble. In my  
opinion Python is too conversative to use the 'strict' encoding which  
gives users unaware of unicode a lot of woes.

So how did you get a unicoded d to start with? If 'somepath' is unicode,  
os.listdir returns a list of unicode. So why is somepath unicode? Either  
you have entered a unicode literal or it comes from some other sources.  
One possible source is XML parser, which returns string in unicode.

Windows NT support unicode filename. I'm not sure about Linux. The result  
maybe slightly differ.






>
> What I specifically do not understand is why Python wants to interpret  
> the
> string as ASCII at all. Where is this setting hidden?
>
> I am running Python 2.3.4 on Windows XP and I want to run the program on
> Debian sarge later.
>
> Ciao, MM



From djc at object-craft.com.au  Wed Feb  2 23:31:35 2005
From: djc at object-craft.com.au (Dave Cole)
Date: Thu, 03 Feb 2005 15:31:35 +1100
Subject: Awkwardness of C API for making tuples
In-Reply-To: <1107289261.185768.116790@f14g2000cwb.googlegroups.com>
References: <dave.opstad-E4D4C4.07281701022005@reader0900.news.uu.net>
	<1107289261.185768.116790@f14g2000cwb.googlegroups.com>
Message-ID: <pRhMd.6933$i6.60496@nasal.pacific.net.au>

John Machin wrote:
> Dave Opstad wrote:
> 
>>One of the functions in a C extension I'm writing needs to return a
>>tuple of integers, where the length of the tuple is only known at
>>runtime. I'm currently doing a loop calling PyInt_FromLong to make
> 
> the
> 
>>integers,
> 
> 
> What is the purpose of this first loop?
> 
> In what variable-length storage are you storing these (Python) integers
> during this first loop? Something you created with (a) PyMem_Malloc (b)
> malloc (c) alloca (d) your_own_malloc?
> 
> 
>>then PyTuple_New, and finally a loop calling PyTuple_SET_ITEM
>>to set the tuple's items. Whew.
> 
> 
> Whew indeed.
> 
> 
>>Does anyone know of a simpler way? I can't use Py_BuildValue because
> 
> I
> 
>>don't know at compile-time how many values there are going to be. And
> 
> 
>>there doesn't seem to be a PyTuple_FromArray() function.
>>
>>If I'm overlooking something obvious, please clue me in!
> 
> 
> 1. Determine the length of the required tuple; this may need a loop,
> but only to _count_ the number of C longs that you have.
> 2. Use PyTuple_New.
> 3. Loop to fill the tuple, using PyInt_FromLong and PyTuple_SetItem.
> 
> Much later, after thoroughly testing your code, gingerly change
> PyTuple_SetItem to PyTuple_SET_ITEM. Benchmark the difference. Is it
> anywhere near what you saved by cutting out the store_in_temp_array
> thing in the first loop?

Shouldn't something like this (uncompiled) do what you want?

- Dave

PyObject *PyTuple_FromArray(int *values, int num_values)
{
     PyObject *tuple;
     int i;

     tuple = PyTuple_New(num_values);
     if (tuple == NULL)
	return NULL;

     for (i = 0; i < num_values; i++) {
	PyObject *obj;

	obj = PyInt_FromLong(value[i]);
	if (obj == NULL
             || PyTuple_SetItem(tuple, i, obj) != 0) {
	    Py_DECREF(tuple);
	    return NULL;
	}
     }

     return tuple;
}


-- 
http://www.object-craft.com.au


From bill.mill at gmail.com  Fri Feb  4 15:44:21 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Fri, 4 Feb 2005 15:44:21 -0500
Subject: Possibly OT: Controlling winamp with Python
In-Reply-To: <O-udnS69k4nmQZ7fRVn-hQ@comcast.com>
References: <JZOdnVLIY48-S57fRVn-hA@comcast.com>
	<1107548407.626431.171350@z14g2000cwz.googlegroups.com>
	<O-udnS69k4nmQZ7fRVn-hQ@comcast.com>
Message-ID: <797fe3d405020412444e6e7c68@mail.gmail.com>

Brent,

You could write the Python program as a proxy of the internet stream.
Basically, you would point your proxy at the web stream and receive
the data it sends. At the same time, you would be listening for
connections on some socket on the local machine. You would then point
winamp towards the local socket instead of the internet station.

If you put a "mute" button on your program, pressing it could trigger
your program to begin sending empty data to winamp, and resume sending
it at some arbitrary point.

Peace
Bil Mill
bill.mill at gmail.com


On Fri, 4 Feb 2005 13:35:04 -0700, Brent W. Hughes
<brent.hughes at comcast.net> wrote:
> The Python program won't decide whether a commercial is playing, I will.  At
> that point, I will run my program which will press mute, wait 20 seconds,
> and then press mute again.
> 
> Actually, I could leave the program running but minimized to the task bar.
> When I hear the advertisement, I just click on the program in the task bar.
> It knows what to do from there.
> 
> Brent
> 
> "Kartic" <kartic.krishnamurthy at gmail.com> wrote in message
> news:1107548407.626431.171350 at z14g2000cwz.googlegroups.com...
> > Brent,
> >
> > Question : how will your python script distinguish between a commercial
> > and a song?
> >
> > I can understand if you are writing a streaming client in Python; in
> > that case you can analyze the audio stream and decide if it is a
> > commercial or a song/music.
> >
> > Did you check to see if there is already a Winamp plugin that would
> > achieve this for you?
> >
> > Thanks,
> > -Kartic
> >
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From fredrik at pythonware.com  Fri Feb 11 16:12:13 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 11 Feb 2005 22:12:13 +0100
Subject: check if object is number
References: <gcidnb9g_ojxnpDfRVn-tA@comcast.com><374ho0F560ughU1@individual.net><66WdnbJbuf5yj5DfRVn-iA@comcast.com>
	<1108155272.438423.177460@l41g2000cwc.googlegroups.com>
Message-ID: <cuj6v7$k6v$1@sea.gmane.org>

Michael Hartl wrote

> As luck would have it, isnumber is a built-in Python function:
>
>>>> isnumber(1)
> True
>>>> isnumber(1.0)
> True
>>>> isnumber('1')
> False

and what strange Python version would that be?

>>> isnumber(1)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
NameError: name 'isnumber' is not defined

</F> 





From benn at cenix-bioscience.com  Wed Feb  2 07:01:57 2005
From: benn at cenix-bioscience.com (Neil Benn)
Date: Wed, 02 Feb 2005 13:01:57 +0100
Subject: Logging
In-Reply-To: <4200BF14.5010408@cenix-bioscience.com>
References: <4200BF14.5010408@cenix-bioscience.com>
Message-ID: <4200C135.9050009@cenix-bioscience.com>

Neil Benn wrote:

> Hello,
>
>          I'm running a test and having issues with logging, if I call 
> logging.shutdown() and then want to start the logging going again then 
> I get a problem as if I call shutdown, I can't get the root logger 
> again, such as :
>
> .<snip>

Previous code missed out a line :

.>>> import logging
.>>> objTestLogger = logging.getLogger()
.>>> objTestLogger.setLevel(logging.INFO)
.>>> objTestLogger.addHandler(logging.FileHandler('c:\\test.log'))
.>>> objTestLogger.info("THIS IS A TEST")
.>>> logging.shutdown()
.>>> objTestLogger = logging.getLogger()
.>>> objTestLogger.setLevel(logging.INFO)
.>>> objTestLogger.addHandler(logging.FileHandler('c:\\test.log'))
.>>> objTestLogger.info("THIS IS A TEST")
.Traceback (most recent call last):
. File "c:\program files\python23\lib\logging\__init__.py", line 679, in 
emit
.    self.stream.write("%s\n" % msg)
.ValueError: I/O operation on closed file
.>>>

    Sorry for the orginal mispost!!

Cheers,

Neil


-- 

Neil Benn
Senior Automation Engineer
Cenix BioScience
BioInnovations Zentrum
Tatzberg 46
D-01307
Dresden
Germany

Tel : +49 (0)351 4173 154
e-mail : benn at cenix-bioscience.com
Cenix Website : http://www.cenix-bioscience.com



From steven.bethard at gmail.com  Wed Feb 16 17:26:43 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 16 Feb 2005 15:26:43 -0700
Subject: Newbie question about class operator overloading
In-Reply-To: <mailman.2725.1108592066.22381.python-list@python.org>
References: <mailman.2637.1108489440.22381.python-list@python.org>	<o_udndekQvmR64_fRVn-tg@comcast.com>
	<mailman.2725.1108592066.22381.python-list@python.org>
Message-ID: <t_udnSj-eOs_VY7fRVn-sA@comcast.com>

Rory Campbell-Lange wrote:
> Hi Steve
> 
> I've been playing around with your two suggestions. 
> 
> The Record class is an elegant solution. It doesn't however help in the
> case where the class has the following general data structure (something
> I should have stated originally):
> 
>     class.config1 = param
>     class.config2 = param
>     class.data    = {
>                        'this' : []
>                        'that' : []
>                        ...
>                     }
> 
> The __setitem__ and __getitem__ methods allow the class.data data
> structure to be dealt with easily as self.data[key] = val
> without worrying about getting involved with other variables such as
> config1 and config2 (because potentially a data key could be called
> 'config1' for example.

Yeah, if the keys of your data dict might collide with the attributes in 
your object, you can't make _data_ a Record type.  On the other hand, 
you can make the items _within_ data Record types, which is what my 
original suggestion said.  For example:

py> class Record(object):
...     def __init__(self, foo, bar, dict, baz):
...         self.foo = foo
...         self.bar = bar
...         self.dict = dict
...         self.baz = baz
...     def __repr__(self):
...         return 'Record(%r, %r, %r, %r)' % (
...             self.foo, self.bar, self.dict, self.baz)
...
py> class C(object):
...     def __init__(self, config1, config2):
...         self.config1 = config1
...         self.config2 = config2
...         self.data = dict(this=Record(1, 2, {}, 4),
...                          that=Record(5, 6, {}, 8))
...     def __getitem__(self, item):
...         return self.data[item]
...
py> c = C(True, False)
py> c['this']
Record(1, 2, {}, 4)
py> c['that']
Record(5, 6, {}, 8)
py> c['this'].foo
1
py> c['that'].bar
6
py> c['that'].baz = 42
py> c['that']
Record(5, 6, {}, 42)

>>...     def __setitem__(self, x, value):
>>...         try:
>>...             name, index = x
>>...             self.data.setdefault(name, {})[index] = value
>>...         except ValueError:
>>...             self.data[x] = value
> ...
> 
>>py> c['one', 0] = 1
> 
> This does seem a lot more logical than my object['three'] = [0, 'val0'].
> Thanks for this (and using try against a possible ValueError).

No prob.  Especially if you expect mostly to get items of the form 
(name, index), the try/except is the way to go.

STeVe


From has.temp2 at virgin.net  Mon Feb 21 13:18:15 2005
From: has.temp2 at virgin.net (has)
Date: 21 Feb 2005 10:18:15 -0800
Subject: recommended way of generating HTML from Python
In-Reply-To: <4219d2a5$1_1@newspeer2.tds.net>
References: <1108889625.068929.88890@z14g2000cwz.googlegroups.com>
	<4218f506$0$1220$8fcfb975@news.wanadoo.fr>
	<1108965380.059565.200110@g14g2000cwa.googlegroups.com>
	<4219d2a5$1_1@newspeer2.tds.net>
Message-ID: <1109009895.900223.19430@g14g2000cwa.googlegroups.com>

Kent Johnson wrote:
> Michele Simionato wrote:
> > The problem is a problem of standardization, indeed. There plenty
of
> > recipes to
> > do the same job, I just would like to use a blessed one (I am
teaching
> > a Python
> > course and I do not know what to recommend to my students).
>
> Why not teach your students to use a template system?

Agreed. Don't use HTML generation simply for the sake of it. While it
has its niche, for most tasks templating is more appropriate. There
aren't any 'blessed' solutions, so just pick whichever third-party
system best fits your needs.



From gargonx at gmail.com  Sun Feb 20 23:12:50 2005
From: gargonx at gmail.com (gargonx)
Date: 20 Feb 2005 20:12:50 -0800
Subject: help please
References: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
	<TPKdnU2eEu9xPJPfRVn-vg@comcast.com>
	<1108260752.791847.180060@l41g2000cwc.googlegroups.com>
	<Z4ydnbKMDLVvEJLfRVn-hA@comcast.com>
	<1108324679.451793.147890@z14g2000cwz.googlegroups.com>
	<i_ydnb41nJ68IZLfRVn-gw@comcast.com>
	<1108329540.239064.144920@f14g2000cwb.googlegroups.com>
	<j7udnc1ZGqsAUZLfRVn-3w@comcast.com>
	<1108334012.336816.221460@g14g2000cwa.googlegroups.com>
	<joSdnbH-qqzBZpLfRVn-tg@comcast.com>
	<1108921146.274248.11500@g14g2000cwa.googlegroups.com>
	<hbydnV4bvrCxcIXfRVn-1w@comcast.com>
Message-ID: <1108959170.585091.202240@z14g2000cwz.googlegroups.com>

Even if i put it in exactly the way you did:

>>> import re
>>> charmatcher = re.compile(r' [A-Z] [\d]?')
>>>
>>> ext = dict(D="V1", O="M1", G="S1")
>>> std = dict(S="H")
>>>
>>> decode_replacements ={}
>>> decode_replacements.update([(std[key], key) for key in std])
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: keys



From jerf at jerf.org  Wed Feb  9 18:34:52 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Wed, 09 Feb 2005 18:34:52 -0500
Subject: Name of type of object
References: <4209A52C.A1C40311@yahoo.com> <bEiOd.83727$Tf5.12604@lakeread03>
	<J8adnUGW461nV5TfRVn-rA@comcast.com>
	<36uo36F54okd6U1@individual.net> <420A8774.638D88E8@yahoo.com>
Message-ID: <pan.2005.02.09.23.34.52.493378@jerf.org>

On Wed, 09 Feb 2005 21:57:15 +0000, Jive Dadson wrote:
> But that works only if the exception happens to be derived from Exception.
>  How do I handle the
> general case?

I believe the answer is that Exceptions not derived from Exception
shouldn't be thrown; it's basically a deprecated feature and has been for
a long time. I've never seen it happen. Add another "except" clause and
use it to bitch at the user for throwing something that isn't an Exception
:-) You won't find any other code that throws anything but an exception,
unless either you or your user wrote it.


From rbt at athop1.ath.vt.edu  Wed Feb 16 11:34:26 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Wed, 16 Feb 2005 11:34:26 -0500
Subject: more os.walk() issues... probably user error
In-Reply-To: <cuvr5b$2ei$1@solaris.cc.vt.edu>
References: <cuvr5b$2ei$1@solaris.cc.vt.edu>
Message-ID: <cuvsmi$4bb$1@solaris.cc.vt.edu>

rbt wrote:
> This function is intended to remove unwanted files and dirs from 
> os.walk(). It will return correctly *IF* I leave the 'for fs in 
> fs_objects' statement out (basically leave out the entire purpose of the 
> function).
> 
> It's odd, when the program goes into that statment... even when only a 
> 'pass', and nothing else is present, nothing is returned. Why is that? 
> I'm testing Python 2.4 on Linux x86 and WinXP. Results are the same on 
> either platform.
> 
>     def build_clean_list(self, path):
> 
>         file_skip_list = ['search_results.txt']
>         dir_skip_list = ['dev', 'proc', 'Temporary Internet Files']
> 
>         fs_objects = os.walk(path, topdown=True)
> ##      for fs in fs_objects:
> ##
> ##            for f in fs[2]:
> ##                if f in file_skip_list:
> ##                    print f
> ##                    fs[2].remove(f)
> ##
> ##            for d in fs[1]:
> ##                if d in dir_skip_list:
> ##                    print d
> ##                    fs[1].remove(d)
> 
>         return fs_objects
> 
> 

Just to clarify, it's wrong of me to say that 'nothing is returned'... 
in either case, this is what is returned:

Here's what was returned and its type:
----------------------------------------
<generator object at 0x407dbe4c>
<type 'generator'>
----------------------------------------

But, I can't iterate over the returned object when I descend into the 
for statement I mentioned above.



From duncan.booth at invalid.invalid  Sat Feb 26 11:47:11 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 26 Feb 2005 16:47:11 GMT
Subject: remove strings from source
References: <2ab23d7a.0502260638.311cc5e9@posting.google.com>
Message-ID: <Xns9609AABCE4210duncanrcpcouk@127.0.0.1>

qwweeeit wrote:

> I need your help in correctly identifying the strings (also embedding
> the r'xx..' or u'yy...' as part of the string definition). The problem
> is mainly on the multi-line definitions or in cached strings
> (embedding chr() definitions or escape sequences).
> 

Have a look at tokenize.generate_tokens() in the standard library. That 
ought to give you enough information to identify the strings reliably and 
output modified source.


From xah at xahlee.org  Sat Feb 19 16:37:43 2005
From: xah at xahlee.org (Xah Lee)
Date: 19 Feb 2005 13:37:43 -0800
Subject: exercise: partition a list by equivalence
In-Reply-To: <1108814276.680736.264380@l41g2000cwc.googlegroups.com>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<1108814276.680736.264380@l41g2000cwc.googlegroups.com>
Message-ID: <1108849063.857663.279920@c13g2000cwb.googlegroups.com>

The GOTO statement from Perl has been messed up.

This block:
?    for group in interm:
?        for newcoup in fin:
?            for k in group.keys():
?                if newcoup.has_key(k):
?                    for kk in group.keys(): newcoup[kk]='x';
?                break
?            break
?        fin.append(group)
?

should be:
?    goto=False
?    for group in interm:
?        for newcoup in fin:
?            for k in group.keys():
?                if newcoup.has_key(k):
?                    newcoup.update(group);
?                    goto=True
?                    break
?            if (goto):
?                goto=False
?                break
?        else:
?            fin.append(group)

comlete code is at:
http://xahlee.org/perl-python/partition_by_equiv.html

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From steve at holdenweb.com  Thu Feb 24 15:06:36 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 24 Feb 2005 14:06:36 -0600
Subject: Shift Confusion
In-Reply-To: <sp0s11hop2bac7heg23e1rv3md67parn88@4ax.com>
References: <1109225214.430739.259600@l41g2000cwc.googlegroups.com>	<u81r111a8v82rt2uqfqd5me0obbua40k2p@4ax.com>	<cvko04$hu9$1@blackmamba.itd.rl.ac.uk>
	<sp0s11hop2bac7heg23e1rv3md67parn88@4ax.com>
Message-ID: <421E33CC.9040600@holdenweb.com>

Dennis Lee Bieber wrote:

> On Thu, 24 Feb 2005 14:22:59 -0000, "Richard Brodie" <R.Brodie at rl.ac.uk>
> declaimed the following in comp.lang.python:
> 
> 
>>"John Machin" <sjmachin at lexicon.net> wrote in message
>>news:u81r111a8v82rt2uqfqd5me0obbua40k2p at 4ax.com...
>>
>>
>>>>Essentially, it should be possible to use a 'packed string' format in
>>>>Python, where as long as the characters you're sending are in the ASCII
>>>>range 0 to 127, two will fit in a byte.
>>>
>>>It should be possible, but only in a realm where phlogiston and
>>>perpetual motion machines exist.
>>
>>alt.sys.pdp10 ?
>>
> 
> 	Closest thing I know of to what is being attempted is DEC's
> RAD-50; but that was essentially just uppercase A..Z, 0..9, and a few
> punctuation marks, and packed three of them into two bytes.
> 
Another code it used was known as SIXBIT, allowing 64 different 
characters. IIRC it could cope with letters, digits and a bunch of 
punctuation - see

   http://nemesis.lonestar.org/reference/telecom/codes/sixbit.html

The DECSystem-10 used a 3-6 bit word, so you could get six sixbit 
characters to a word. In ASCII you could only get four (or, if you threw 
the parity bit away, five) characters to a word.

While its character-handling instructions weren't, as I recall, unique 
in the industry, the DECSystem-10 remains the only hardware I ever got 
to use that had instructions to handle variable byte sizes.

regards
  Steve



From noreply at python.org  Sat Feb 12 13:55:42 2005
From: noreply at python.org (Mail Delivery Subsystem)
Date: Sat, 12 Feb 2005 19:55:42 +0100
Subject: Message could not be delivered
Message-ID: <200502121857.j1CIvQux022146@phoenix.szarvas.hu>

The message could not be delivered

-------------- next part --------------
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From brian at mirror.org  Thu Feb 24 20:37:11 2005
From: brian at mirror.org (Brian Roberts)
Date: 24 Feb 2005 17:37:11 -0800
Subject: web status display for long running program
Message-ID: <509534af.0502241737.5f62992@posting.google.com>

I have a command line Python program that sometimes takes a bit
(several minutes) to run.  I want to provide an optional method for an
impatient user (me!) to check the status of the program.  The type and
amount of status information doesn't fit nicely into a --verbose or
logger -- either too little or too much information at different
points.

I think an optional web page would be convenient interface.  The
Python program would listen on some port, and if queried (by me
browsing to localhost:12345 for example) would return a pretty status
display.  Hitting reload would update the status etc.

My problem is that I'm not sure how to do this:
- I don't want to embed a full web server into the application or
require any special PC setup.
- I think I know how to listen on a socket, but not sure how to send
stuff to to a web browser -- just start with <HTML>?  Or like a CGI
script with the header stuff like text/html?  (I don't care if I have
to write the HTML by hand or can use a toolkit -- not important).
- Do I need a separate thread to listen and send the HTML?  The
application is currently single threaded.  I'm confortable with
threads, but would prefer to avoid them if possible.

Or is there a better/different way of doing this?  Any general advice
or pointers to some code that already does this would be very much
appreciated.

Python 2.3, under both Linux & Windows if that makes a difference.

Thanks,
Brian.


From thomastnewman at yahoo.com  Thu Feb 17 17:23:45 2005
From: thomastnewman at yahoo.com (Thomas Newman)
Date: Thu, 17 Feb 2005 23:23:45 +0100
Subject: error in non-existing code?
Message-ID: <42151971.70806@yahoo.com>

Hi all,

I have added a few files to my project in eric3. When I want to open the
tree that (supposedly) shows me the classes, I get an error:

--------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python2.3/site-packages/UI/Browser.py", line 310, in
setOpen
  File "/usr/lib/python2.3/pyclbr.py", line 447, in readmodule_ex
   
KeyError: 'TimerSelectionWidget'
--------------------------------------------------------------------

(TimerSelectionWidget is the first class I declare in the file)

I wanted to look at the code that gives me the error, but there is no
line 447 in /usr/lib/python2.3/pyclbr.py:


> wc -l /usr/lib/python2.3/pyclbr.py
344 /usr/lib/python2.3/pyclbr.py


That confuses me. Any suggestions?

TTN


From ilias at lazaridis.com  Tue Feb 15 10:04:25 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 17:04:25 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2599.1108429568.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr> <curb3t$67k$3@usenet.otenet.gr>
	<mailman.2599.1108429568.22381.python-list@python.org>
Message-ID: <cut31n$bur$1@usenet.otenet.gr>

Tim Peters wrote:
> [Ilias Lazaridis]
> ...
> 
>>Let's see:
>>
>>The process would be:
>>
>>a) A Python Foundation official states: "of course we accept diversity
>>and of course we are intrested that our source-code-base compiles
>>directly with MinGW (and other compilers)".
> 
> Well, I'm a Director of the Python Software Foundation, and my view is
> "the more platforms the merrier".  

I extract: "you are intrested, that the source-code-base compiles 
directly with MinGW (and other compilers)".

Thus you should be intrested, that existent patches are incorporated 
into the source-code-base.

The suggested process ist: use of #defines whenever possible, to avoid 
influence on the existent behaviour of the code.

> But I'm not paid to work on Python,
> and I don't have time to volunteer to help MinGW along, so I don't
> anticipate that I'll do anything here beyond writing this reply.

You have done already very much.

But should should take some time to evaluate community needs.

> I think you're mistaken about the role the PSF plays here.  For
> example, the PSF does no development work on Python -- all work on
> Python comes from volunteers, and the PSF can't tell anyone what to
> do.  

I understand.

PSF has no influence on the development. I've read a little around, and 
start to understand:

http://www.python.org/psf/records/board/minutes-2004-11-09.html

> The PSF did start a grant program last year, and a proposal to
[...] - (funding)

I don't think that a founding is neccessary.

This effort could be driven by the intrested community members (which 
obviously exist).

>>b) the pyMinGW developer states: "I am intrested that my patches are
>>included within the main python source code base" [of course this
>>contribution would deserve to be mentioned somewhere]

I mean the developer of those patches:

http://jove.prohosting.com/iwave/ipython/pyMinGW.html

He must be intrested that his patches are incorporated to the main 
source code base, which would render his website useless [but of course 
not his efforts and reputation].

[Of course his website could still serve as an "central point" for 
intrested MinGW specific contributors.]

>>c) One part of the Python Community states: "look those loosers, like to
>>use MinGW toolkit - pah! I'll continue to use my super-optimizing, xx%
>>faster results, less hassle Microsoft-Compiler"

 From the replies within this thread, i've extracted that some community 
members would think somehow this way.

>>d) One part of the Python Community states: "I'm very happy that my
>>toolset of choice gets official support, to which I can contribute as a
>>community member"

 From the replies within this thread, i've extracted that some community 
members would think somehow this way.

>>e) there is no point e. People start simply to cooperate, thus python's
>>evolution is ensured.

A solid source-code-base and centralized efforts are a fundamentall part 
for the evolution of python.

> Sorry, I didn't grasp the point of b thru e.

I've tried to clarify.

-

Now, can you please tell me the process I have to follow to suggest the 
following (to the PSF or to the programmers or to the decision takers), 
possibly to get at least a vote on it:

"Please ensure that the source-code-base compliles directly with MinGW. 
The suggested process is to:

   * provide the infrastructure
     (e.g. mailinglist, issue- tracking-category,... )

   * Notify the community about this subproject to channelise efforts

   * include existing MinGW specific patches

   * ensure future verificatioin of changes,
     * optimal:    due to an automated build-system
     * or simpler: due to community-feedback
"

I've read a little about the processes:

http://www.python.org/dev/
http://www.python.org/dev/culture.html
http://www.python.org/dev/process.html

But I can't figure it out.

>>... 
>>Good night to all.
> 
> 
> Likewise!

.

-- 
http://lazaridis.com


From mlk at klio.org  Tue Feb 15 23:07:30 2005
From: mlk at klio.org (Mike Kozlowski)
Date: Wed, 16 Feb 2005 04:07:30 +0000 (UTC)
Subject: SOAP 1.2 library?
Message-ID: <cuugu2$h2a$1@reader2.panix.com>

I've done some looking around, and I can't find a SOAP 1.2 library for
Python.  ZSI and SOAPy both appear to support SOAP 1.1, and 4Suite
appears not to support SOAP at all any more.  

Am I missing something (very likely; I don't have a good feel for the
Python landscape yet), or is this just a completely unsupported
technology in Python right now?

-- 
Mike Kozlowski
http://www.klio.org/mlk/



From grig.gheorghiu at gmail.com  Fri Feb 11 09:26:15 2005
From: grig.gheorghiu at gmail.com (Grig Gheorghiu)
Date: 11 Feb 2005 06:26:15 -0800
Subject: Testing web applications
References: <cui0pe$r0c$04$1@news.t-online.com>
	<420CB538.1060108@swiftdsl.com.au>
	<cuid76$j5s$00$1@news.t-online.com>
Message-ID: <1108131974.974543.197920@o13g2000cwo.googlegroups.com>

The Jython / HttpUnit combination worked well for me too. There's also
maxq (http://maxq.tigris.org/), which looks promising, but I haven't
used it yet.

Grig

====
http://agiletesting.blogspot.com



From jstroud at mbi.ucla.edu  Sun Feb 20 23:18:15 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 20 Feb 2005 20:18:15 -0800
Subject: intersection of 2 list of pairs
In-Reply-To: <1108920276.253388.23590@f14g2000cwb.googlegroups.com>
References: <1108920276.253388.23590@f14g2000cwb.googlegroups.com>
Message-ID: <200502202018.15734.jstroud@mbi.ucla.edu>

Learned list comprehension today, its cool:


>>> E1=[('a','g'),('r','s')]
>>> E2=[('g','a'),('r','q'),('f','h')]
>>> [x for x in E1 for y in E2 if x == y or (x[1],x[0])==y]
[('a', 'g')]




On Sunday 20 February 2005 09:24 am, les_ander at yahoo.com wrote:
> Hi,
> I have 2 lists of tuples that look like:
> E1=[('a','g'),('r','s')] and
> E2=[('g','a'),('r','q'),('f','h')].
> In this tuple, the ordering does not
> matter, i.e. (u,v) is the same as (v,u).
>
> What I want to do is the following:
> given 2 list of tuples, E1 and E2, I want to create another list with
> tuples that are common to both. So in the above example I would like
> to return ('a','g') as being common.
> So far I have the code below but it does not work out properly, I would
> be grateful if someone can help me out .
> thanks
>
> def list_of_tuples_intersect(E1,E2):
>
> 	S1=Set()
> 	S2=Set()
> 	for e in E1:
> 		S1.add((e[0],e[1]))
> 		S1.add((e[1],e[0]))
> 	for e in E2:
> 		S2.add((e[0],e[1]))
> 		S2.add((e[1],e[0]))
> 	S= S1 & S2
> 	SS=Set()
> 	done=Set()
>
> 	for e in S:
> 		if ((e[0],e[1])  in done) or ((e[1],e[0])  in done):
> 			continue
> 		else:
> 			SS.add((e[0],e[1]))
> 			done.add((e[0],e[1]))
> 			done.add((e[1],e[0]))
> 	return SS

-- 
James Stroud, Ph.D.
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095


From davidschein at alumni.tufts.edu  Tue Feb 15 23:15:02 2005
From: davidschein at alumni.tufts.edu (David S.)
Date: Wed, 16 Feb 2005 04:15:02 +0000 (UTC)
Subject: [newbie]How to install python under DOS and is there any
	Wxpython	can be installed under dos?
References: <maydnWS6O4mTIo_fRVn-tQ@rogers.com>
Message-ID: <loom.20050216T051234-654@post.gmane.org>

john san <jkjone2002 <at> att.net> writes:

> 
> How to install python under DOS and is there any Wxpython-like can be
> installed under dos?
> 
> Thanks.
> 
If you are looking for Windows installers then, yes. See:
http://www.wxpython.org/
http://www.wxpython.org/download.php#binaries

If you are really looking for dos binaries, I guess you need to 
build them yourself.



From ajsiegel at optonline.com  Mon Feb  7 08:52:40 2005
From: ajsiegel at optonline.com (Arthur)
Date: Mon, 07 Feb 2005 08:52:40 -0500
Subject: declarations summary
References: <1107750862.485179.61980@c13g2000cwb.googlegroups.com>
Message-ID: <08re01tp7d9eh7j9pgi3u1672nbhuamaua@4ax.com>

On 6 Feb 2005 20:34:22 -0800, "Michael Tobis" <mt at 3planes.com> wrote:

>
>General usage has "declaration" meaning "statement which does not
>generate executable bytecode but merely affects the compiler". My
>assertion that decorator syntax is "declarative" is therefore formally
>false.

I'm not sure what this adds to the discussion, but I think it worth
noting that PEP318 and Guido's own discussion make it very clear that
the choice of Python decorator syntax was influenced - presumable by
the drawing of some analogy - to Java Annotation syntax:

http://java.sun.com/j2se/1.5.0/docs/guide/language/annotations.html

The documentation as to Java annotations seems clear tht annotations
are considered as declarative, within the context of the Java
language.

But also in those docs:

"""
Typical application programmers will never have to define an
annotation type, but it is not hard to do so.  
"""

IMO, there was that analogy as well that had some influence on the
decision.  It needed to be something that communicated decorators as
something beyond the scope of "everyday Python".  Which would mean
something not too deeply embedded, which may account for the reason
that the proposals with more obvious surface aesthetic appeal like the
one's you refer to were rejected.

Beauty of course being only skin deep.  Given that the decorators had
to happen when they happened (that being a separate point of
contention), I happen to think Guido's choice was a good and
courageous one.

Art



From ilias at lazaridis.com  Tue Feb 15 10:52:28 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 17:52:28 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2583.1108421758.22381.python-list@python.org>
References: <mailman.2583.1108421758.22381.python-list@python.org>
Message-ID: <cut5rq$o4d$1@usenet.otenet.gr>

Delaney, Timothy C (Timothy) wrote:
> Stephen Kellett wrote:
> 
>>In message <cuq5du$k7g$1 at usenet.otenet.gr>, Ilias Lazaridis
>><ilias at lazaridis.com> writes
>>
>>>> And yet there is not one company that has someone devoted full-time
>>>>to  developing Python. Not even Guido.
>>>
>>>Who's "Guido"?
>>
>>LOL Falling off my chair!!!!!!
> 
> See, the problem is that you have to go all the way to the second FAQ in
> order to find out who Guido is. Obviously it needs to be more prominent
> on the Python web site.
> 
> Oh - you mean Ilias didn't actually *read* anything on the Python web
> site? My bad.
> 
> Illias - I'm assuming you are not a troll (despite the contrary
> evidence) and am going to direct you to a site with all the answers you
> need.
> 
> http://www.catb.org/~esr/faqs/smart-questions.html

I know this document.

It has no relevance to me.

> Tim Delaney

.

-- 
http://lazaridis.com


From alan.mcintyre at esrgtech.com  Tue Feb  8 20:52:42 2005
From: alan.mcintyre at esrgtech.com (Alan McIntyre)
Date: Tue, 08 Feb 2005 20:52:42 -0500
Subject: Lambda
In-Reply-To: <9VdOd.110$0b3.4668@news.uswest.net>
References: <9VdOd.110$0b3.4668@news.uswest.net>
Message-ID: <N1eOd.106018$Jk5.45431@lakeread01>

e wrote:
> Question: WHAT IS LAMBDA? I can't figure out what it does from any 
> documentation i've found anywhere. i doubt i need it but i still want to 
> know what the heck it is/does/fixes/whatever! 

Here's something:

http://docs.python.org/tut/node6.html#SECTION006750000000000000000

Hope this helps,
Alan McIntyre
ESRG LLC
http://www.esrgtech.com


From jfabiani at yolo.com  Sun Feb 13 18:44:13 2005
From: jfabiani at yolo.com (John Fabiani)
Date: Sun, 13 Feb 2005 23:44:13 GMT
Subject: Second posting - Howto connect to MsSQL
References: <iyMPd.4612$ZZ.1645@newssvr23.news.prodigy.net>
Message-ID: <hDRPd.4681$ZZ.4511@newssvr23.news.prodigy.net>

John Fabiani wrote:

> Hi,
> Since this is (sort of) my second request it must not be an easy solution.
> Are there others using Python to connect MsSQL?  At the moment I'd accept
> even a windows solution - although, I'm looking for a Linux solution.
> 
> John
Thanks all - it looks like it will work with windows at least.
John


From f.geiger at vol.at  Tue Feb  1 05:07:07 2005
From: f.geiger at vol.at (F. GEIGER)
Date: Tue, 1 Feb 2005 11:07:07 +0100
Subject: Python's idiom for function overloads
References: <mailman.1677.1107230965.22381.python-list@python.org>
	<41ff066c$0$6473$636a15ce@news.free.fr>
Message-ID: <ctnk79$bdv$1@news.hispeed.ch>

> > Since Python doesn't have static typing, how is the same result as
traditional
> > function overloads results in acheived?

The more you program in Python, the less you are missing it.

As Philippe already said, use objects that support the protocol or decide
what to do with it after having checked its type. I do that, if I have to,
like so:

def doIt(arg):
   if type(arg) == type([]):
      map(doIt, arg)
   else:
      # Do it on a scalar type
      # ...
      return result

HTH
Franz GEIGER


"Philippe Fremy" <phil at freehackers.org> schrieb im Newsbeitrag
news:41ff066c$0$6473$636a15ce at news.free.fr...
> Hi Frans,
>
> > Since Python doesn't have static typing, how is the same result as
traditional
> > function overloads results in acheived?
>
> With dynamic typing obviously. :-)
>
> You can not reproduce the C++ overload idiom but you can get something
> close with manual type testing.
>
>  > To in a
>  > function do an if statement with the type() function?
>
> I am not aware of any other method.
>
> def a( arg1 ):
> if type(arg1) == types.IntType: return aWithInt(arg1)
> if type(arg1) == types.ListType: return aWithList(arg1)
> ...
>
> As you see, it is a bit tedious sometimes.
>
> If you want to juggle with completely different signatures, you have to
> play with variable argument lists. But I have found in my experience
> that the best way to get close to the C++ idiom, while improving
> readbility, is by using kwparams:
>
> def a(**kwparams):
> if kwparams.has_key('argInt'): aWithInt(kwparams['argInt'])
> if kwparams.has_key('argString'): aWithString(kwparams['argString'])
>
> The parsing code is the same, but the intent of the user is better
> expressed and you can catch misuse in a better fashion:
> if kwparams.has_key('argInt') and kwparams.has_key('argString'):
> print "You stupid moron, a can be used only with string or int but not
> both at the same time!"
> sys.exit(1)
>
> The example speaks better in a real case. Imagine a processPixmap
function:
> processPixmap( pixmap=QPixmap(...) )
> processPixmap( filename='my_pixmap.png' )
> processPixmap( buffer=my_pixmap_string_content )
>
> It works actually even better with multiple arguments.
>
> regards,
>
> Philippe




From rkern at ucsd.edu  Fri Feb 11 22:47:26 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Fri, 11 Feb 2005 19:47:26 -0800
Subject: Big development in the GUI realm
In-Reply-To: <pan.2005.02.12.02.22.08.617190@jerf.org>
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
	<5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>
	<mailman.2095.1107801722.22381.python-list@python.org>
	<ivgf0193dti7a2qq00fadekkhcgobmiaub@4ax.com>
	<4207c8db$0$21623$a1866201@visi.com>
	<cub12p$pke$1@achot.icm.edu.pl>
	<36sip2F56jjmaU1@individual.net> <umzubw8xg.fsf@vh-s.de>
	<pan.2005.02.11.11.43.56.884015@jerf.org>
	<374826F5851cbU1@individual.net>
	<pan.2005.02.11.13.12.44.276464@jerf.org>
	<cujchp$oh7$1@news1.ucsd.edu>
	<pan.2005.02.12.02.22.08.617190@jerf.org>
Message-ID: <cuju8e$t22$1@news1.ucsd.edu>

Jeremy Bowers wrote:
> On Fri, 11 Feb 2005 14:45:09 -0800, Robert Kern wrote:
> 
>>Until such matters are unequivocally determined in a court that has
>>jurisdiction over you, do you really want to open yourself to legal risk
>>and certain ill-will from the community?
> 
> 
> Huh? What are you talking about?
> 
> I'm just pointing out the inability of the law to handle it. I have no
> intention of doing anything with it, except inasmuch as it makes it
> difficult to license my own works since I don't believe any license works.
> (But I use the LGPL anyways.)

Sorry, it seemed like you were proposing a method to "get around" the 
intention of the copyright holder.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From steven.bethard at gmail.com  Sun Feb 13 20:14:10 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 13 Feb 2005 18:14:10 -0700
Subject: help please
In-Reply-To: <1108334012.336816.221460@g14g2000cwa.googlegroups.com>
References: <1108254434.871062.314510@g14g2000cwa.googlegroups.com>
	<TPKdnU2eEu9xPJPfRVn-vg@comcast.com>
	<1108260752.791847.180060@l41g2000cwc.googlegroups.com>
	<Z4ydnbKMDLVvEJLfRVn-hA@comcast.com>
	<1108324679.451793.147890@z14g2000cwz.googlegroups.com>
	<i_ydnb41nJ68IZLfRVn-gw@comcast.com>
	<1108329540.239064.144920@f14g2000cwb.googlegroups.com>
	<j7udnc1ZGqsAUZLfRVn-3w@comcast.com>
	<1108334012.336816.221460@g14g2000cwa.googlegroups.com>
Message-ID: <joSdnbH-qqzBZpLfRVn-tg@comcast.com>

gargonx wrote:
> let's take the word "dogs"
> 
>    ext = dict("D":"V1",  "O":"M1", "G":"S1")
>    std = dict("S":"H")
> 
> encode("DOGS") # proc()
> we'll get: "V1M1S1H"
> 
> let's say i want to do just the opposite
> word: "V1M1S1H"
> decode("V1M1S1H")
>     #how do i decode "V1" to "D", how do i keep the "V1" together?
> and get: "DOGS"

If you can make some assumptions about the right-hand sides of your 
dicts, you can probably tokenize your string with a simple regular 
expression:

py> import re
py> charmatcher = re.compile(r'[A-Z][\d]?')
py>
py> ext = dict(D="V1", O="M1", G="S1")
py> std = dict(S="H")
py>
py> decode_replacements = {}
py> decode_replacements.update([(std[key], key) for key in std])
py> decode_replacements.update([(ext[key], key) for key in ext])
py>
py> def decode(text):
...     return ''.join([decode_replacements.get(c, c)
...                     for c in charmatcher.findall(text)])
...
py>
py> decode("V1M1S1H")
'DOGS'

So, instead of using
     for c in text
I use
     for c im charmatcher.findall(text)
That gives me the correct tokenization, and i can just use the inverted 
dicts to map it back.  Note however that I've written the regular 
expression to depend on the fact that the values in std and ext are 
either single uppercase characters or single uppercase characters 
followed by a single digit.

Steve




From fredrik at pythonware.com  Fri Feb 11 17:34:36 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 11 Feb 2005 23:34:36 +0100
Subject: goto, cls, wait  commands
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net><cuhpa6$oou$1@news.tiscali.fr>
	<110q581greo8g9e@corp.supernews.com> <cuj9qj$p86$1@news.tiscali.fr>
Message-ID: <cujbpn$1u0$1@sea.gmane.org>

"jean-michel" <nospam at nospam.fr> wrote:

> And it was not possible to remove GOTO, because that would really need
> to rewrite manually the programs

really?  converting GOTO messes to structured programs has been a solved
problem for many years (you can buy commercial products that does this, and
I don't think they come with programmers in the box)

</F> 





From frank at chagford.com  Tue Feb  1 02:31:16 2005
From: frank at chagford.com (Frank Millman)
Date: 31 Jan 2005 23:31:16 -0800
Subject: Line graphics on Linux console
In-Reply-To: <1107014625.348051.239750@f14g2000cwb.googlegroups.com>
References: <1107014625.348051.239750@f14g2000cwb.googlegroups.com>
Message-ID: <1107243076.427845.238900@z14g2000cwz.googlegroups.com>


Frank Millman wrote:
> Hi all
>
> The following is a message I sent to co.os.linux.setup -
>
> "My question concerns line graphics on a text-based console. ?My
> actual problem relates to a [Python] program I have written using
> ncurses, b?ut you can easily test it by running a program like
> minicom.
>
> If you call up the minicom menu, it should be surrounded by ?a nice
> box made up of horizontal and vertical lines, corners, etc. It used
to
> work up until Redhat 7. Since upgrading to Redhat 9, and now
Fedo?ra,
> it (and my program) has stopped working."
>
> I received the following reply from Thomas Dickey -
>
> "That's because Redhat uses UTF-8 locales, and the Linux cons?ole
> ignores vt100 line-drawing when it is set for UTF-8.  (screen also
> d?oes this)."

For the record, I have found a solution, or at least a workaround.

I received the following suggestion from Steve (thanks Steve) -

"As a quick check to see if it's only the UTF-8 locales that are
affecting your program, try invoking your program, like so:

$ LANG=C <your-proggy>"

I tried this, but it did not work. However, it felt as if it ought to,
so I sent another message to Thomas Dickey (who, I have discovered, is
the maintainer of the ncurses library).

He replied that the console is probably still in unicode mode, but you
can turn it off with 'unicode_stop'.

I tried this and it worked :-) - I did not even have to change the LANG
or TERM settings.

Obviously this will not work if you need unicode, but luckily for me I
do not, so it is a perfect workaround.

Frank Millman



From erikbethke at gmail.com  Wed Feb  9 09:25:30 2005
From: erikbethke at gmail.com (Erik  Bethke)
Date: 9 Feb 2005 06:25:30 -0800
Subject: Trouble with the encoding of os.getcwd() in Korean Windows
In-Reply-To: <1107958914.583017.79190@l41g2000cwc.googlegroups.com>
References: <1107953764.478501.176650@c13g2000cwb.googlegroups.com>
	<cud2nj$det$1@news6.zwoll1.ov.home.nl>
	<1107956992.350460.12720@f14g2000cwb.googlegroups.com>
	<1107958914.583017.79190@l41g2000cwc.googlegroups.com>
Message-ID: <1107959130.925848.91910@l41g2000cwc.googlegroups.com>

Ah and PS, again this is only for paths that are non-aschii or at least
have Korean in them...

The broswer bit launches successfully in other locations.

-Erik



From mep_ at 163.com  Fri Feb 25 02:15:00 2005
From: mep_ at 163.com (mep)
Date: Fri, 25 Feb 2005 15:15:00 +0800
Subject: wanted: C++ parser written in Python
References: <mukr11t39khpd8od53im9jic3s6qjcl3j2@4ax.com>
	<3881hvF5jg6qrU1@individual.net>
Message-ID: <3881r8F5lo6i5U1@individual.net>


"mep" <mep_ at 163.com> wrote in message news:3881hvF5jg6qrU1 at individual.net...
> Try ANTLR with python code generation:
> http://www.antlr.org/
>
> And C++ grammers:
> http://www.antlr.org/grammar/cpp
>
> You can generate a c++ parser in python with the above.
^^^^^^^^^^^^^^^^^
Sorry. Haven't look into the stuff carefully.
That grammer file requires some c++ code.

>
> -- 
> Best Regards,
> Wang Kebo
>
> http://www.huihoo.org/~mep
>
>
> "Franz Steinhaeusler" <franz.steinhaeusler at utanet.at> wrote in message
> news:mukr11t39khpd8od53im9jic3s6qjcl3j2 at 4ax.com...
> > Hello NG,
> >
> > has anyone written such a thing in python?
> > Where could I look for?
> >
> > (I need it for an editor written in wxPython to display function names,
> > include, global variables, classes, ... in a sidepanel).
> >
> > kind regards,
> > -- 
> > Franz Steinhaeusler
>
>




From ncoghlan at iinet.net.au  Mon Feb  7 08:35:14 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Mon, 07 Feb 2005 23:35:14 +1000
Subject: variable declaration
In-Reply-To: <slrnd0epjg.26q.apardon@rcpc42.vub.ac.be>
References: <4202A022.3050209@netscape.net>	<MSGID_2=3A5025=2F3.131_4204b0a9@fidonet.org>	<mailman.1978.1107622451.22381.python-list@python.org>
	<slrnd0epjg.26q.apardon@rcpc42.vub.ac.be>
Message-ID: <42076E92.5010505@iinet.net.au>

Antoon Pardon wrote:
> Op 2005-02-05, Nick Coghlan schreef <ncoghlan at iinet.net.au>:
> 
> 
>>[ ... ]
>>
>>With a rebinding operator, the intent of the last line can be made explicit:
>>
>>def collapse(iterable):
>>     it = iter(iterable)
>>     lastitem = it.next()
>>     yield lastitem
>>     for item in it:
>>         if item != lastitem:
>>             yield item
>>             lastitem .= item
>>
>>(Note that doing this *will* slow the code down, though, since it has to check 
>>for the existence of the name before rebinding it)
> 
> 
> I think that most of the time it won't slow down the code as the
> checking will have been done during the compilation phase. It
> may even speed up code like this, because the compilation
> phase will have established that it is a rebinding and so
> code for testing whether a new variable is created or not
> is not necessarry here.
> 

Since unbound locals are generally detected at runtime rather than compile time, 
I see no real reason why this case would be any different. Static checks would 
be in the hands the tools like pychecker (as is currently the case for 
references to unbound locals)

Py> def f():
...   x
...   x= 3
...
Py> f()
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "<stdin>", line 2, in f
UnboundLocalError: local variable 'x' referenced before assignment

So I'd expect the compiler to generate slower code for it (probably just a 
LOAD/STORE pair instead of just a STORE instruction), but the optimiser should 
eventually be able to do something to eliminate the performance penalty due to 
the technically unnecessary LOAD. I doubt it will be able to beat a STORE_FAST 
when it comes to trying to get a performance improvement, though :)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From snacktime at gmail.com  Sun Feb  6 17:02:30 2005
From: snacktime at gmail.com (snacktime)
Date: Sun, 6 Feb 2005 14:02:30 -0800
Subject: Python versus Perl ?
In-Reply-To: <1107726328.158314.265680@o13g2000cwo.googlegroups.com>
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
	<slrnd0cofg.rr5.jgrahn-nntq@frailea.sa.invalid>
	<1107726328.158314.265680@o13g2000cwo.googlegroups.com>
Message-ID: <1f060c4c050206140261c342e@mail.gmail.com>

I just recently picked up Python after using perl almost exclusively
for the last 8 years, and the above mentioned article by Eric Raymond
echos my feelings almost exactly.

The one drawback coming from the perl world is that you don't have as
many options when it comes stuff like application frameworks, and some
of the third party modules just aren't as well tested not having the
huge user base that perl does.  I end up spending a bit more time
searching for different libraries than I did in perl, but beyond that
I think python is better overall.

Chris


From xah at xahlee.org  Sat Feb 26 20:26:31 2005
From: xah at xahlee.org (Xah Lee)
Date: 26 Feb 2005 17:26:31 -0800
Subject: [perl-python] generate all possible pairings
Message-ID: <1109467591.827686.95540@f14g2000cwb.googlegroups.com>

20050226 exercise: generate all possible pairings

given a list that is a set partitioned into subsets, generate a list
of all possible pairings of elements in any two subset.

Example:

 genpair( [[9,1],[5],[2,8,7]] );

returns:

 [[5,8],[9,5],[1,5],[9,2],[9,7],[1,8],[1,7],[5,2],[1,2],[9,8],[5,7]]

(we do not assume the given set has order, so the result is not
ordered.)

Perl code and Python code will be posted in 2 days.

This is brought to you by the perl-python community. To subscribe, see
http://xahlee.org/perl-python/python.html

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From rbt at athop1.ath.vt.edu  Mon Feb 14 09:32:55 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Mon, 14 Feb 2005 09:32:55 -0500
Subject: safest way to open files on all platforms
In-Reply-To: <mailman.2532.1108390847.22381.python-list@python.org>
References: <cuqbo6$hp6$1@solaris.cc.vt.edu>
	<mailman.2532.1108390847.22381.python-list@python.org>
Message-ID: <cuqcqn$jho$1@solaris.cc.vt.edu>

Fredrik Lundh wrote:
> "rbt" wrote:
> 
> 
>>I believe that this is the safest way to open files on Windows, Linux, Mac and Unix, but I wanted 
>>to ask here just to be sure:
>>
>>fp = file('filename', 'rb')
>>
>>The 'b' on the end being the most important ingredient (especially on Windows as a simple 'r' on a 
>>binary file might cause some sort of corruption).
>>
>>Anyway, am I right in saying this? That 'rb' is the safest way to open files for reading and that 
>>it should work well on *all* Python supported platforms?
> 
> 
> "rb" works on all platforms, yes.  but it doesn't work well if you're reading a text file.
> 
> (when reading text files, the "U" option may also be useful.  see doc for details)
> 
> </F> 

I'm using 'rb' in a situation where all files on the drive are opened. 
I'm not checking how the file is encoded before opening it (text, 
unicode, jpeg, etc.) That's why I though 'rb' would be safest.

Can 'U' be used with 'rb'? Should it be? From what I read, 'U' handles 
the different ways in which the OS handles the 'end of line' on text 
files, but other than that, I don't think it's useful for me.


From jerf at jerf.org  Tue Feb 15 21:05:27 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 15 Feb 2005 21:05:27 -0500
Subject: "perl -p -i -e" trick in Python?
References: <cuuol5$2ri$1@news1.kornet.net>
Message-ID: <pan.2005.02.16.02.05.27.30904@jerf.org>

On Wed, 16 Feb 2005 15:18:57 +0900, Wonjae Lee wrote:

> I read the comment of
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/277753.
> (Title : Find and replace string in all files in a directory)
> 
> "perl -p -i -e 's/change this/..to this/g'" trick looks handy.
> Does Python have a similar trick? Or, is there a shorter Python recipe for
> the given problem?

As a Python lover... I still tend to use "perl -pi -e", except in rare
cases where I either can't deal with or don't want to deal with the
necessary escaping, in which case I write a quick perl script like this
(just did this today):

#!/usr/bin/perl
$source = join "", <>;
$source =~ s/\"\"\".*?\"\"\"[ \n]*//gs;
print $source;

While a Python-golf contest might be able to beat that (although,
truthfully, to match this feature for feature I'd be surprised... that <>
is a substantial whack of code to fully emulate and I use this both as a
pipe and by feeding it a long list of files as arguments), I still
couldn't have written it as quickly.

Upshot is, perl is good for something, and when I'm not doing the job I
have working with perl, I'll still reach for perl -pi -e without shame.
Well, actually, only with the shame that I really need to lookup the
command to save backups and start using it. ("man perlrun"... I know where
to find it, I just need to add it to muscle memory!) Much longer than this
though and I drop the perl and run away, if possible.


From jrlen97 at gmail.com  Mon Feb 14 03:08:32 2005
From: jrlen97 at gmail.com (Jan Rienyer Gadil)
Date: Mon, 14 Feb 2005 16:08:32 +0800
Subject: saving a text file
Message-ID: <c78fcbdc050214000874ce19a@mail.gmail.com>

any idea how to automatically save to a text file?
here's what the program do:

first, data is read from the serial port every fixed lenght of time
the data will then be put to a table,
now, every serial read, a table will be created for the data that will
be gathered (one window for each table)
to avoid showing in too many windows, each table will be automatically
saved as a txt file after every 5 tables created.
the txt file will be named after the time it was taken (say from the
system clock)

thanks for your help and more power...


From duncan.booth at invalid.invalid  Wed Feb  2 12:08:08 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 2 Feb 2005 17:08:08 GMT
Subject: Hash of class from instance
References: <1107363342.531396.238350@g14g2000cwa.googlegroups.com>
Message-ID: <Xns95F1AE4AFCC36duncanrcpcouk@127.0.0.1>

Joakim Storck wrote:

> Is there any way that I can find the hash value of a class from an
> instance?
> 

You only had to post the question once. It seems a strange thing to want, 
but just do:

    hash(a.__class__)



From steven.bethard at gmail.com  Thu Feb 17 19:26:34 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 17 Feb 2005 17:26:34 -0700
Subject: global var
In-Reply-To: <42152b84$0$15817$636a15ce@news.free.fr>
References: <42152b84$0$15817$636a15ce@news.free.fr>
Message-ID: <P-qdnVqEQoqlq4jfRVn-jA@comcast.com>

raver2046 wrote:
> How to have a global var in python ?

You can, but you probably don't want to.  What's your use case?  Example 
code and what you'd like it to do would be helpful.

STeVe


From tom.willis at gmail.com  Mon Feb 14 20:29:41 2005
From: tom.willis at gmail.com (Tom Willis)
Date: Mon, 14 Feb 2005 20:29:41 -0500
Subject: wxPython OGL future
In-Reply-To: <1108428501.441786.154130@g14g2000cwa.googlegroups.com>
References: <1108428501.441786.154130@g14g2000cwa.googlegroups.com>
Message-ID: <b54d0489050214172910d5dd3b@mail.gmail.com>

What are you looking to do exactly? I don't know what OGL is.



On Mon, 14 Feb 2005 16:50:51 -0800 (PST), PD <albaalu at gmail.com> wrote:
> Hi Everyone,
> 
> I am sort of a new developer to python and working in an academic
> environment. I climbed the learning curve on wxPython far enough to get
> the functionality I want out of it so far... Now Im in need of a
> diagramming library (something visio-like) to use for my software and
> the only option I have seen is OGL. Yet I read that OGL is dead, no
> longer maintained, obsucure and lacking documentation. Instead of
> taking a leap of faith and walking off a cliff, Ide appreciate if some
> people out there who have come across a similar problem have any
> solutions or suggestions for me...
> 
> I am so disappointed at the moment I think Im about ready to throw in
> the towel and crawl back to java. I love python, but it has some real
> difficulties when it comes to making library choices on what _to_ and
> _not to_ get yourself into.
> 
> I appreciate your guidance,
> Pouya
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
Thomas G. Willis
http://paperbackmusic.net


From ilias at lazaridis.com  Sat Feb 19 10:30:30 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sat, 19 Feb 2005 17:30:30 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <cv7k8e$4pa$03$1@news.t-online.com>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<42172136$0$27576$9b622d9e@news.freenet.de>
	<cv7i57$d0v$1@usenet.otenet.gr> <cv7k8e$4pa$03$1@news.t-online.com>
Message-ID: <cv7m2m$gp$1@usenet.otenet.gr>

Diez B. Roggisch wrote:
>>Should a professional developer take python serious?
[...] - (ungentle babbling after disrupting coherence of writings)

"
Should a professional developer take python serious?

I mean, if the team does not manage at least the foundation of a 
multi-target automated-build-process?

[targets need not to be supported directly by the python team. They 
could be added/managed/maintained by community members]
"

.

-- 
http://lazaridis.com


From grante at visi.com  Mon Feb 14 15:37:54 2005
From: grante at visi.com (Grant Edwards)
Date: 14 Feb 2005 20:37:54 GMT
Subject: Can't subclass datetime.datetime?
References: <421100b4$0$41671$a1866201@visi.com>
	<4s-dnbRfytZMmYzfRVn-iA@comcast.com>
Message-ID: <42110c22$0$41640$a1866201@visi.com>

On 2005-02-14, Steven Bethard <steven.bethard at gmail.com> wrote:
> Grant Edwards wrote:
>> Is it true that a datetime object can convert itself into a
>> string, but not the other way around?  IOW, there's no simple
>> way to take the output from str(d) and turn it back into d?
>
> I assume this is true because there is not one standard format
> for a date-time string.

There seems to be a de-facto standard format: that which is
returned by the str(d).

>> class MyDatetime(datetime.datetime):
>>     def __init__(self,s):
[...]

> datetime.datetime objects are immutable, so you need to define
> __new__ instead of __init__:

Thanks. I should have known that. I guess I've never subclassed
an immutible type before.

-- 
Grant Edwards                   grante             Yow!  It's hard being
                                  at               an ARTIST!!
                               visi.com            


From lee at example.com  Sun Feb  6 10:53:42 2005
From: lee at example.com (Lee Harr)
Date: Sun, 06 Feb 2005 15:53:42 GMT
Subject: OT: why are LAMP sites slow?
References: <7x8y65kwfl.fsf@ruckus.brouhaha.com>
	<opslnkqsjo6yt6e7@news.cisco.com>
	<7xhdktt36q.fsf@ruckus.brouhaha.com>
	<opslnr3rbs6yt6e7@news.cisco.com>
	<7xacqkc0uq.fsf@ruckus.brouhaha.com>
	<mailman.1892.1107532773.22381.python-list@python.org>
	<cu51m5$c6j$1@eeyore.INS.cwru.edu>
Message-ID: <a4rNd.3807$Sw3.2134@news02.roc.ny>

On 2005-02-06, Brian Beck <exogen at gmail.com> wrote:
>> Refactoring a database on a live system is a giant pain in the ass,
>> simpler file-based approaches make incremental updates easier.
>> 

> As much as I hate working with relational databases, I think you're 
> forgetting the reliability even the most poorly-designed database 
> provides. Continuing with the words example: assuming all words would 
> otherwise be stored in a table, consider the process of updating the 
> database schema--all entries are guaranteed to conform to the new 
> schema.


Not only that, but with a well-design RDBMS you can put your
schema changes inside of a transaction and make sure everything
is right before committing.

Isn't there a saying like ... those who create file-based
databases are destined to re-create a relational database
management system poorly?  ;o)


From john at metalab.unc.edu  Fri Feb 11 12:49:22 2005
From: john at metalab.unc.edu (John Reuning)
Date: Fri, 11 Feb 2005 12:49:22 -0500
Subject: 1998 CNRI license compatibility
Message-ID: <1108144162.31119.30.camel@cardoel.metalab.unc.edu>

I'm interested in updating the very old kerberos extension module.
However, the code dates to 1998 and is licensed under what appears to be
a pre-python-1.6 CNRI license.  Does anyone have recommendations on
whether additions and changes to the old code can be licensed under a
newer OSI-approved license?  There is information on GPL, CNRI 1.6, and
python license compatibility, as well as a history of the python
licenses in the current python license file.  But I can't find
suggestions on what to do with such an old version of the CNRI license.

http://www.python.org/ftp/python/contrib-09-
Dec-1999/System/krb5module-0.1.tar.gz
http://www.python.org/ftp/python/contrib-09-
Dec-1999/System/krb5module.README

Any ideas will be appreciated.

Many thanks,

-John R.


From http  Wed Feb 16 17:06:05 2005
From: http (Paul Rubin)
Date: 16 Feb 2005 14:06:05 -0800
Subject: low-end persistence strategies?
References: <7xll9pus7o.fsf_-_@ruckus.brouhaha.com>
	<1108570047.677348.146850@f14g2000cwb.googlegroups.com>
	<7x7jl8bhii.fsf@ruckus.brouhaha.com>
	<1108572988.341139.126020@z14g2000cwz.googlegroups.com>
Message-ID: <7x650syxbm.fsf@ruckus.brouhaha.com>

"Michele Simionato" <michele.simionato at gmail.com> writes:
> The documentation hides this fact (I missed that) but actually
> python 2.3+ ships with the pybsddb module which has all the
> functionality you allude too.  Check at the test directory for bsddb.

Thanks, this is very interesting.  It's important functionality that
should be documented, if it works reliably.  Have you had any probs
with it?


From skip at pobox.com  Wed Feb  9 05:32:20 2005
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 9 Feb 2005 04:32:20 -0600
Subject: Python mail filter 
In-Reply-To: <92fj011sghl3nmrhef8h951r1aa8vp66vl@4ax.com>
References: <4208f1d0$1@news.starhub.net.sg>
	<92fj011sghl3nmrhef8h951r1aa8vp66vl@4ax.com>
Message-ID: <16905.59060.492389.331412@montanaro.dyndns.org>


    >> (P.S. I am very much aware of the existence of procmail, TMDA etc. My
    >> requirements are very specific and requires integration with another
    >> program, so I am only interested in getting a custom solution).

    Tim> But are you aware that a procmail recipe can feed a message through
    Tim> a filter, and then pass the results of that filter back in to the
    Tim> e-mail system for further processing?

Should the OP need further evidence that this is possible, this is exactly
how I use SpamBayes [1].

Skip

[1] http://www.spambayes.org/


From michele.simionato at gmail.com  Sat Feb 26 12:24:43 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 26 Feb 2005 09:24:43 -0800
Subject: Making a calendar
In-Reply-To: <422071d5$0$22691$ba624c82@nntp04.dk.telia.net>
References: <422071d5$0$22691$ba624c82@nntp04.dk.telia.net>
Message-ID: <1109438683.741512.320910@o13g2000cwo.googlegroups.com>

Looking at the "calendar" module in the standard library may help.
Also, "pydoc calendar" is your friend.

    Michele Simionato



From aurora00 at gmail.com  Sat Feb 19 12:09:55 2005
From: aurora00 at gmail.com (aurora)
Date: Sat, 19 Feb 2005 09:09:55 -0800
Subject: unicode and socket
References: <1108753426.318777.275250@c13g2000cwb.googlegroups.com>
	<opsmeqf1w76yt6e7@news.cisco.com>
	<1108782636.359541.99450@z14g2000cwz.googlegroups.com>
Message-ID: <opsmgfattf6yt6e7@news.cisco.com>

On 18 Feb 2005 19:10:36 -0800, <zyqnews at 163.net> wrote:

> It's really funny, I cannot send a unicode stream throuth socket with
> python while all the other languages as perl,c and java can do it.
> then, how about converting the unicode string to a binary stream? It is
> possible to send a binary through socket with python?
>

I was answering your specific question:

"How can I send the unicode string to the remote end of the socket as it  
is without any conversion of encode"

The answer is you could not. Not that you cannot sent unicode but you have  
to encode it. The same applies to perl, c or Java. The only difference is  
the detail of how strings get encoded.

There are a few posts suggest various means. Or you can check out  
codecs.getwriter() which closer resembles Java's way.


From john at grulic.org.ar  Fri Feb 18 09:44:53 2005
From: john at grulic.org.ar (John Lenton)
Date: Fri, 18 Feb 2005 11:44:53 -0300
Subject: how can i randomly choose keys in dictionary
In-Reply-To: <pan.2005.02.18.08.35.30.188839@thomas-guettler.de>
References: <1108692826.040660.71750@g14g2000cwa.googlegroups.com>
	<pan.2005.02.18.08.35.30.188839@thomas-guettler.de>
Message-ID: <20050218144453.GC17991@grulic.org.ar>

On Fri, Feb 18, 2005 at 09:35:30AM +0100, Thomas Guettler wrote:
> Am Thu, 17 Feb 2005 18:13:46 -0800 schrieb neutrinman:
> 
> > Hi,there. How can I choose a key in dictionary randomly?
> > 
> > Say, random.choice() in lists,
> > 
> > or in lists:
> > lists = [1,2,3,4]
> > position = random.range(len(lists))
> > word = lists[position]
> 
> Hi, try this:
> 
> import random
> 
> mydict={1: "one", 2: "two"}
> print mydict[random.choice(mydict.keys())]

if you're going to do that, why don't you do

  print random.choice(mydict.values())

?

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
Quien da parte de sus cohechos, de sus tuertos hace derechos. 
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From stefan.behnel-n05pAM at web.de  Mon Feb 14 10:14:38 2005
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Mon, 14 Feb 2005 16:14:38 +0100
Subject: [PATCH] allow partial replace in string.Template
In-Reply-To: <mailman.2525.1108384043.22381.python-list@python.org>
References: <cuq0dl$opq$1@lnx107.hrz.tu-darmstadt.de>
	<mailman.2525.1108384043.22381.python-list@python.org>
Message-ID: <cuqf8v$uec$1@lnx107.hrz.tu-darmstadt.de>



Nick Coghlan wrote
> a) Patches are more likely to be looked at if placed on the SF patch 
> tracker.

see your own b), I wanted to discuss them first.

> b) I don't quite see the point, given how easy these are to spell using 
> the basic safe_substitute. You're replacing one liners with one-liners.

Still, when I first tried out the Template class, I immediately stumbled over 
the fact that the substitute methods always return strings, and never Template 
objects. While it makes sense for their primary purpose, it totally restricts 
the usage of this module to one-show operations.

Being able to partially evaluate the Template is something that is absolutely 
missing in the implementation. I consider that a bug that should be fixed for 
2.5 at latest.

Stefan


From steven.bethard at gmail.com  Thu Feb  3 15:39:49 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 03 Feb 2005 13:39:49 -0700
Subject: remove duplicates from list *preserving order*
Message-ID: <BfmdnTjWquaJEZ_fRVn-3A@comcast.com>

I'm sorry, I assume this has been discussed somewhere already, but I 
found only a few hits in Google Groups...  If you know where there's a 
good summary, please feel free to direct me there.


I have a list[1] of objects from which I need to remove duplicates.  I 
have to maintain the list order though, so solutions like set(lst), etc. 
will not work for me.  What are my options?  So far, I can see:

def filterdups(iterable):
     result = []
     for item in iterable:
         if item not in result:
             result.append(item)
     return result

def filterdups(iterable):
     result = []
     seen = set()
     for item in iterable:
         if item not in seen:
             result.append(item)
             seen.add(item)
     return result

def filterdups(iterable):
     seen = set()
     for item in iterable:
         if item not in seen:
             seen.add(item)
             yield item

Does anyone have a better[2] solution?

STeve

[1] Well, actually it's an iterable of objects, but I can convert it to 
a list if that's helpful.

[2] Yes I know, "better" is ambiguous.  If it helps any, for my 
particular situation, speed is probably more important than memory, so 
I'm leaning towards the second or third implementation.


From ncoghlan at iinet.net.au  Sat Feb  5 21:41:06 2005
From: ncoghlan at iinet.net.au (Nick Coghlan)
Date: Sun, 06 Feb 2005 12:41:06 +1000
Subject: variable declaration
In-Reply-To: <1grixdp.1ttyiwh1m4ydsiN%aleaxit@yahoo.com>
References: <MSGID_2=3A5025=2F3.131_41fde342@fidonet.org>	<1gr98se.102e9b1qnsknwN%aleaxit@yahoo.com>	<MSGID_2=3A5025=2F3.131_4204c40a@fidonet.org>	<1grifns.14san6f1b076mdN%aleaxit@yahoo.com>	<MSGID_2=3A5025=2F3.131_420506b1@fidonet.org>	<1griqnv.7iuvul8vpt6N%aleaxit@yahoo.com>	<mailman.1975.1107621941.22381.python-list@python.org>
	<1grixdp.1ttyiwh1m4ydsiN%aleaxit@yahoo.com>
Message-ID: <420583C2.1050609@iinet.net.au>

Alex Martelli wrote:
> It's not clear to me what semantics, exactly, x.y := z would be defined
> to have (assuming := is the syntax sugar for ``rebinding'').  Perhaps,
> by analogy with every other augmented operator, it should be equivalent
> to:
> 
>     _temp = x.y
>     x.y = type(temp).__irebind__(temp, z)
> 
> This makes it crystal-clear what happens when type(x).y is a descriptor
> with/without __set__ and __get__, when type(x) defines __getattribute__
> or __setattr__, etc, etc.  Giving type object an __irebind__ which just
> returns the second operand would complete the semantics.  Of course,
> doing it this way would open the issue of types overriding __irebind__,
> and it's not clear to me that this is intended, or desirable.  So, maybe
> some other semantics should be the definition.  But since "rebinding" is
> not a primitive, the semantics do need to be somehow defined in terms of
> elementary operations of getting and setting (of attributes, items, &c).

I was thinking of something simpler:

   x.y
   x.y = z

That is, before the assignment attempt, x.y has to resolve to *something*, but 
the interpreter isn't particularly fussy about what that something is.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at email.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://boredomandlaziness.skystorm.net


From jfj at freemail.gr  Sat Feb 19 17:15:55 2005
From: jfj at freemail.gr (jfj)
Date: Sat, 19 Feb 2005 14:15:55 -0800
Subject: lambda closure question
In-Reply-To: <1108808502.699333.66520@g14g2000cwa.googlegroups.com>
References: <1108798951.128843.79810@f14g2000cwb.googlegroups.com>
	<1108802613.284686.200170@o13g2000cwo.googlegroups.com>
	<mailman.2826.1108806125.22381.python-list@python.org>
	<1108808502.699333.66520@g14g2000cwa.googlegroups.com>
Message-ID: <4217BA9B.8070602@freemail.gr>

Carl Banks wrote:

> jfj wrote:
> 
>>Carl Banks wrote:
>>
>>>Ted Lilley wrote:
>>>
>>>>Unfortunately, it doesn't work.  It seems the closure keeps track
> of
> 
>>>>the variable fed to it dynamically - if the variable changes after
>>>
>>> [...]
>>>
>>>>At least, that's the explanation I'm deducing from this behavior.
>>>
>>>
>>>And that's the correct explanation, chief.
>>
>>>It is intended that way.  As an example of why that is: consider a
>>>nested function called "printvars()" that you could insert i
> 
> various
> 
>>>places within a function to print out the value of some local
> variable.
> 
>>> If you did that, you wouldn't want printvars to print the values
> at
> 
>>>the time it was bound, would you?
>>
>>Allow me to disagree (and start a new "confused with closures"
> thread:)
> 
>>We know that python does not have references to variables. To some
>>newcomers this may seem annoying but eventually they understand the
>>pythonic way and they do without them. But in the case of closures
>>python supports references!
> 
> 
> That's right.  It's called Practicality beats purity.
> 

Yes, but according to the python philosophy one could pass locals()
to the nested function and grab the values from there. Seems practical
for the rareness of this...

>  My experience bears this out: I find that about half the nested
> functions I use are to reference an outer scope, half I return as a
> closure.  Only once or twice did I try to use a nested function inside
> the defining function.  I would guess this is more or less typical of
> how nested functions are used.  If so, it was the right decision.
> 

The question is how many of the nested functions you use take advantage
of the fact that the deref'd variable is a *reference to a variable* and
not a *constant* (different constant for each definition of the nested
function of course).
Or, IOW, it seems very reasonable that if somebody wants to write the
"printvars()" function, he could simply pass locals().

I would accept this being the right decision if there was a statement
like "global var", called "deref var" with which nested funcs could
modify those variables.  Then we could say:

#############
def foo():
     def f1(y):
         deref x
         x = y
     def f2():
         print x
     x=11
     return f1, f2
####################
But one should go with OOP in that case instead.

Ogligatory Python 3000 suggestion:
I hope in python 3000, we'll get rid of CellObjects and insert
freevars at the consts of the function object at MAKE_CLOSURE.


jfj



From dontwant at spam.com  Wed Feb  9 18:47:23 2005
From: dontwant at spam.com (Courageous)
Date: Wed, 09 Feb 2005 15:47:23 -0800
Subject: Big development in the GUI realm
References: <mailman.2135.1107829480.22381.python-list@python.org>
	<e0ag011atnlt5b00klicjol93c7j8fe341@4ax.com>
	<ndhg011h971bdl5o1i4k76j6n3tp15m38b@4ax.com>
	<gtgl01pkgcrv9huon2i98coa918r3pjubb@4ax.com>
Message-ID: <228l01p7u4tqehkbfnni3btdplijf5rgla@4ax.com>


>It should also be pointed out that the FSF's interpretation of the GPL
>with respect to Qt means absolutely zero.

Indeed. It would be the court that would have to decide what the
language of the GPL means, given the substantial body of case
law as the court sees it.


>... but it establishes that you *knew* what their interpretation ...

But it doesn't. They'd really need to put it into their license
expressly.

Anyway, we digress, and are in agreement.

C//



From alex at fortworks.com  Thu Feb 17 15:01:12 2005
From: alex at fortworks.com (imphasing)
Date: 17 Feb 2005 12:01:12 -0800
Subject: How to I access the filename with TkFileDialog?
Message-ID: <1108670472.375513.214220@o13g2000cwo.googlegroups.com>

I'm writing a python program to open a file, and display it onscreen,
but I can't seem to find the var that "tkOpenFileName" returns to. It's
not much use if you can't get the filename you just chose, so there
must be a way to get it. Could anyone help me?

Thanks,
Alex



From fredrik at pythonware.com  Sun Feb 20 10:12:13 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 20 Feb 2005 16:12:13 +0100
Subject: segfault when calling Python from C thread
References: <mailman.2845.1108863127.22381.python-list@python.org>
	<TA1Sd.1558$873.1345@newsread3.news.pas.earthlink.net>
Message-ID: <cva95i$umn$1@sea.gmane.org>

Greg Chapman wrote:

> Your callback function needs to hold the Python GIL (and have a vaild
> threadstate) before it calls any Python C-API functions.  Change the
> last part of it to:
>
>    PyGILState_STATE state;
>
>    /* ... */
>
>    /* Time to call the callback */
>
>    state = PyGILState_Ensure();
>
>    arglist = Py_BuildValue("(s)", str);
>    result = PyEval_CallObject(my_callback, arglist);
>    Py_DECREF(arglist);
>    if(result == NULL)
>        return;
>    Py_DECREF(result);
>
>    PyGILState_Release(state);
> }

you might wish to make sure you release the GIL even if the callback
raises an exception...

</F> 





From irmen.NOSPAM at xs4all.nl  Fri Feb 11 16:31:46 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Fri, 11 Feb 2005 22:31:46 +0100
Subject: is there a safe marshaler?
In-Reply-To: <YjTOd.47318$Z14.32821@news.indigo.ie>
References: <420b6936$0$28982$e4fe514c@news.xs4all.nl>
	<9RMOd.47295$Z14.32810@news.indigo.ie>
	<420bd184$0$28994$e4fe514c@news.xs4all.nl>
	<DtROd.47310$Z14.32852@news.indigo.ie>
	<420bedb4$0$28975$e4fe514c@news.xs4all.nl>
	<YjTOd.47318$Z14.32821@news.indigo.ie>
Message-ID: <420d2441$0$28991$e4fe514c@news.xs4all.nl>

Alan Kennedy wrote:

> I should learn to keep my mouth zipped :-L

:-D

> OK, I really don't have time for a detailed examination of either the 
> JSON spec or the python impl of same. And I *definitely* don't have time 
> for a detailed security audit, much though I'd love to.

No problem. The patch you wrote is a very good start, I think!!



Interestingly enough, I just ran across "Flatten":
http://sourceforge.net/project/showfiles.php?group_id=82591&package_id=91311

"...which aids in serializing/unserializing networked data securely,
without having to fear execution of code or the like."

Sounds promising!


--Irmen


From http  Fri Feb  4 11:51:04 2005
From: http (Paul Rubin)
Date: 04 Feb 2005 08:51:04 -0800
Subject: advice needed for simple python web app
References: <5cqdnZX-cZ9ca5_fRVn-3Q@rogers.com>
	<ctv48p$75$1@eeyore.INS.cwru.edu>
	<N86dnZ7k56I3gJ7fRVn-tg@rogers.com>
	<7xis58reac.fsf@ruckus.brouhaha.com>
	<zsKdnThuwKcpGZ7fRVn-hA@rogers.com>
Message-ID: <7xis58tgjr.fsf@ruckus.brouhaha.com>

"Dan Perl" <danperl at rogers.com> writes:
> This matches pretty much what I've decided to do.  I'll start with cgi and 
> CGIHTTPServer because I'll learn more from that and then move to a 
> framework, quite likely CherryPy, although by that time I may change my 
> choice.  Philip Greenspun's book looks good and I'll have to go through it. 
> Thanks for the advice. 

You might also look at the docs for HTML::Mason (www.masonhq.com) to
get a look at a reasonably mature template system, even if you don't
plan to use it (because it's in Perl and not Python).  I'm not sure if
CherryPy is directly comparable.  I haven't yet used any of the Python
template systems.


From mahs at telcopartners.com  Wed Feb 23 13:21:27 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 23 Feb 2005 10:21:27 -0800
Subject: Style guide for subclassing built-in types?
In-Reply-To: <1109163706.118457.53720@z14g2000cwz.googlegroups.com>
References: <ba1e306f.0502221846.70cb4d5c@posting.google.com>	<1109127834.660822.247120@g14g2000cwa.googlegroups.com>	<1109150091.356411.150460@l41g2000cwc.googlegroups.com>	<1109151417.903188.73790@f14g2000cwb.googlegroups.com>	<421c76cd$1_1@newspeer2.tds.net>
	<1109163706.118457.53720@z14g2000cwz.googlegroups.com>
Message-ID: <cvihcd$7ou$1@sea.gmane.org>

janeaustine50 at hotmail.com wrote:
> Kent Johnson wrote:
> 
>>janeaustine50 at hotmail.com wrote:
>>
>>>p.s. the reason I'm not sticking to reversed or even reverse :
> 
> suppose
> 
>>>the size of the list is huge.
>>
>>reversed() returns an iterator so list size shouldn't be an issue.
>>
>>What problem are you actually trying to solve?
>>
>>Kent
>>
> 
> 
> Oh, you are right.
> 
> Actually, it's more complicated than simple reversion. The list order
> should be somewhat "twisted" and the list is big.
> 
> For example,
> 
> [1,2,3,4,5,6,7,8,9,10]
> 
> --> [10,9,8,7,6,1,2,3,4,5]
> 
> so __getitem__(self,i) => __getitem__(self,-i-1) if i<len(size)/2,
> otherwise __getitem__(self,i-len(size)/2)
> 
> I'd like to have TwistedList class that takes in an original list and
> pretends as if it is twisted actually. However, I have to have
> duplicate codes here and there to make it act like a "list", say assert
> twisted_list == [10,9,...] and for each in twisted_list and etc.
> 
If you want a twisted 'view' of an existing list, then a wrapper makes most sense.

If, however, you only need the twisted version, why not simply override 
list.__init__ (and extend, append etc... as required):

  >>> class rev_list(list):
  ... 	def __init__(self, iterable):
  ... 		list.__init__(self, iterable[::-1])
  ... 	
  >>> l = rev_list([1,2,3])
  >>> l
  [3, 2, 1]

Michael



From rbt at athop1.ath.vt.edu  Fri Feb  4 15:25:04 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Fri, 04 Feb 2005 15:25:04 -0500
Subject: string issue
In-Reply-To: <87lla4w0av.fsf@pobox.com>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
	<36QMd.103084$Jk5.36127@lakeread01> <87lla4w0av.fsf@pobox.com>
Message-ID: <cu0ln1$o5t$1@solaris.cc.vt.edu>

John J. Lee wrote:
> Steve Holden <steve at holdenweb.com> writes:
> [...]
> 
>>You are modifying the list as you iterate over it. Instead, iterate
>>over a copy by using:
>>
>>for ip in ips[:]:
>>   ...
> 
> 
> Just to help popularise the alternative idiom, which IMO is
> significantly less cryptic (sane constructors of mutable objects
> almost always make a copy, and list is no exception: it's guaranteed
> to do so):
> 
> for ip in list(ips):
>    ...
> 
> 
> Works back to at least Python 1.5.2.
> 
> 
> John

I don't know that that approach is less cryptic. ips is already a 
list... it looks cryptic to make it a list again, doesn't it? IMO, the 
two are equally cryptic. The epitome of clarity would be copy(ips)... 
now *that* makes sense, of course, ips[:] or list(ips) work equally well 
to the programmer who has learned them.


From ericjardim at gmail.com  Wed Feb 23 13:22:57 2005
From: ericjardim at gmail.com (Eric Jardim)
Date: 23 Feb 2005 10:22:57 -0800
Subject: PyQt and Python 2.4 - also WinXP LnF?
References: <1108003471.242829.297030@o13g2000cwo.googlegroups.com>
	<mailman.2295.1108027117.22381.python-list@python.org>
	<1108065099.593832.314470@f14g2000cwb.googlegroups.com>
	<1108152792.710263.117650@z14g2000cwz.googlegroups.com>
	<1108340682.521315.234620@l41g2000cwc.googlegroups.com>
Message-ID: <1109182977.527020.195910@f14g2000cwb.googlegroups.com>

Simon John - Feb 13, 4:24 pm:
> After building with MSVC6 (Python 2.3.5 and 2.4  versions) I've
noticed
> that the ToolTips don't seem to work in the GPL version.

Free (GPL) Qt3 port to Windows is not complete. They indeed need help
to conclude their job.  And as Trolltech is not going to release Qt3
under GPL, to "encorage" people using Qt4, this work of porting is not
useless.


> MSVC6 is about twice as fast to build as MinGW....

I think it is because they use precompiled headers. But I prefer to
wait rather than using MSVC.



From dave at pythonapocrypha.com  Fri Feb 25 17:02:04 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Fri, 25 Feb 2005 15:02:04 -0700
Subject: Dealing with config files what's the options
In-Reply-To: <slrnd1v6rp.nhu.jgrahn-nntq@frailea.sa.invalid>
References: <mailman.2952.1109122710.22381.python-list@python.org>
	<slrnd1v6rp.nhu.jgrahn-nntq@frailea.sa.invalid>
Message-ID: <421FA05C.4020700@pythonapocrypha.com>

Jorgen Grahn wrote:
> On Tue, 22 Feb 2005 20:38:28 -0500, Tom Willis <tom.willis at gmail.com> wrote:
> 
>>How are the expert pythoneers dealing with config files?
> 
> ...
> 
>>Any ideas?
> 
> 
> How about writing them in Python?

Depending on who will be editing the config files, this can be a great approach.

At the simplest level, a config.py file like this is so easy to use:

# Net settings
timeoutSec = 5.3
maxConnections = 3

# Other stuff
foo = 'bar'

This type of a format is easy to use for just about anybody who has ever had to 
use config files before. What's nice is that the code to use it is 
straightforward too:

import config
conn = config.maxConnections
...

A few times I've tried to use accessor functions to ensure that the values are 
present or valid or whatever, but I stopped doing that because in practice it's 
just not needed (again, for users who are familiar with the concept of config 
files).

A slightly more elaborate approach gives you full structure:

class Net:
     maxConnections = 12

class System:
     class Logging:
         root = '/var/logs'

This prevents individual setting names from getting unwieldy, and the code that 
uses it can be pretty readable too:

logRoot = config.System.Logging.root

or, if there are lots of retrievals to do:

Logging = config.System.Logging
logRoot = Logging.root
... etc ...

Using classes asks a little bit more of the users (they can break it a little 
more easily), but again, in practice it really hasn't been a problem at all.

-Dave


From Steve.Coates at smiths-aerospace.com  Sat Feb  5 03:08:00 2005
From: Steve.Coates at smiths-aerospace.com (Coates, Steve (ACHE))
Date: Sat, 5 Feb 2005 01:08:00 -0700
Subject: "Collapsing" a list into a list of changes
Message-ID: <3082C9F9373DAD43918C64BAC1CF038C87BBD8@COSSMGMBX04.EMAIL.CORP.TLD>


It's not _exactly_ what you asked for but it may be enough...

Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from sets import Set
>>> l = [0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5]
>>> s = Set(l)
>>> s
Set([0, 1, 2, 3, 4, 5])
>>> l2 = list(s)
>>> l2
[0, 1, 2, 3, 4, 5]
>>>

I say it's not exactly what you wanted because I don't think the
ordering
of l2 is necessarily the same as l. That may or may not be a problem for
you.

Regards
Steve



> -----Original Message-----
> From: Alan McIntyre [mailto:alan.mcintyre at esrgtech.com]

> Sent: 04 February 2005 17:44
> To: python-list at python.org
> Subject: "Collapsing" a list into a list of changes
>

> Hi all,
>

> I have a list of items that has contiguous repetitions of

> values, but the number and location of the repetitions is not

> important, so I just need to strip them out.  For example, if

> my original list is [0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5], I

> want to end up with [0,1,2,3,2,4,5].
>

> Here is the way I'm doing this now:
>

> def straightforward_collapse(myList):
>      collapsed = [myList[0]]
>      for n in myList[1:]:
>          if n != collapsed[-1]:
>              collapsed.append(n)
>

>      return collapsed
>

> Is there an elegant way to do this, or should I just stick

> with the code above?
>

> Thanks,
> Alan McIntyre
> http://www.esrgtech.com
>

>


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From harlinseritt at yahoo.com  Tue Feb 22 05:28:45 2005
From: harlinseritt at yahoo.com (Harlin)
Date: 22 Feb 2005 02:28:45 -0800
Subject: How to write a ping client
In-Reply-To: <421a9d54$0$44652$a1866201@visi.com>
References: <1109039706.092671.137360@f14g2000cwb.googlegroups.com>
	<421a9d54$0$44652$a1866201@visi.com>
Message-ID: <1109068125.070219.54510@o13g2000cwo.googlegroups.com>

whoa... this is not in the standard library, is it? I never knew this
was out there. Thanks!

Please use your powers for good (the one about halting production on
teenage sex comedies :)



From petr at tpc.cz  Thu Feb  3 19:02:53 2005
From: petr at tpc.cz (McBooCzech)
Date: 3 Feb 2005 16:02:53 -0800
Subject: how to generate SQL SELECT pivot table string
Message-ID: <1107475373.064794.155030@l41g2000cwc.googlegroups.com>

Hallo all,

I am trying to generate SQL SELECT command which will return pivot
table. The number of column in the pivot table depends on the data
stored in the database. It means I do not know in advance how many
columns the pivot table will have.

For example I will test the database as following:
SELECT DISTINCT T1.YEAR FROM T1

The SELECT command will return:
2002
2003
2004
2005

So I would like to construct following select:

select T1.WEEK,
SUM (case T1.YEAR when '2002' then T1.PRICE else 0 END) Y_02,
SUM (case T1.YEAR when '2003' then T1.PRICE else 0 END) Y_03,
SUM (case T1.YEAR when '2004' then T1.PRICE else 0 END) Y_04,
SUM (case T1.YEAR when '2005' then T1.PRICE else 0 END) Y_05
from T1
group by T1.week

which will return pivot table with 5 columns:
WEEK, Y_02, Y_03, Y_04, Y_05,

but if the command "SELECT DISTINCT T1.YEAR FROM T1" returns:
2003
2004

I have to construct only following string:

select T1.WEEK,
SUM (case T1.YEAR when '2003' then T1.PRICE else 0 END) Y_03,
SUM (case T1.YEAR when '2004' then T1.PRICE else 0 END) Y_04,
from T1
group by T1.week

which will return pivot table with 3 columns:
WEEK, Y_03, Y_04

Can anyone help and give me a hand or just direct me, how to write a
code which will generate SELECT string depending on the data stored in
the database as I described?

Thanks

Petr McBooCzech



From duncan.booth at invalid.invalid  Tue Feb 15 04:23:58 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 15 Feb 2005 09:23:58 GMT
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108370491.792820.142200@z14g2000cwz.googlegroups.com>
	<cuprg2$6rt$1@usenet.otenet.gr> <37bcdkF5bg7knU1@individual.net>
	<cupumi$kfs$1@usenet.otenet.gr> <37bel6F59jvkgU1@individual.net>
	<cuq4d6$fqp$1@usenet.otenet.gr>
	<Xns95FD7EAD8A162duncanrcpcouk@127.0.0.1>
	<curb0t$67k$2@usenet.otenet.gr>
Message-ID: <Xns95FE5F96DEF96duncanrcpcouk@127.0.0.1>

Ilias Lazaridis wrote:

>> "In accordance with section 10 of the GPL, Red Hat, Inc. permits
>> programs whose sources are distributed under a license that complies
>> with the Open Source definition to be linked with libcygwin.a without
>> libcygwin.a itself causing the resulting program to be covered by the
>> GNU GPL." 
> 
> If I understand this right, I cannot produce commercial software with 
> the cygwin toolset.
> 

Contrariwise. You can produce commercial software, and it doesn't have to 
be GPL licensed. However if you want to distribute it (and much, possibly  
most, commercial software is never distributed) you have to choose between 
making it open-source, or buying a commercial license for cygwin. You do 
realise that you can produce open-source software commercially?

If you want to make your program closed source then to distribute it you 
have to pay for the cygwin license, which all seems pretty fair to me. You 
have a problem with that?


From fredrik at pythonware.com  Wed Feb 16 16:57:17 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 16 Feb 2005 22:57:17 +0100
Subject: Using 'in' with a Dict
References: <1108590222.589358.7310@o13g2000cwo.googlegroups.com>
Message-ID: <cv0fe6$odq$1@sea.gmane.org>

<cpmcdaniel at gmail.com> wrote:

>I was wondering if the following two "if" statements compile down to
> the same bytecode for a standard Dictionary type:
>
> m = {"foo": 1, "blah": 2}
>
> if "foo" in m:
>  print "sweet"
>
> if m.has_key("foo"):
>  print "dude"

nope.

>>> import dis
>>> dis.dis(compile("'foo' in dict", "", "exec"))
  1           0 LOAD_CONST               0 ('foo')
              3 LOAD_NAME                0 (dict)
              6 COMPARE_OP               6 (in)
              9 POP_TOP
             10 LOAD_CONST               1 (None)
             13 RETURN_VALUE
>>> dis.dis(compile("dict.has_key('foo')", "", "exec"))
  1           0 LOAD_NAME                0 (dict)
              3 LOAD_ATTR                1 (has_key)
              6 LOAD_CONST               0 ('foo')
              9 CALL_FUNCTION            1
             12 POP_TOP
             13 LOAD_CONST               1 (None)
             16 RETURN_VALUE

"in" is a built-in operator, "has_key" is an ordinary method.  both
paths end up in the same C function, but the method path is usually
a little bit slower.

</F> 





From cam.ac.uk at mh391.invalid  Thu Feb 17 17:33:53 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Thu, 17 Feb 2005 22:33:53 +0000
Subject: error in non-existing code?
In-Reply-To: <mailman.2782.1108677969.22381.python-list@python.org>
References: <mailman.2782.1108677969.22381.python-list@python.org>
Message-ID: <cv364j$omq$1@gemini.csx.cam.ac.uk>

Thomas Newman wrote:

> I wanted to look at the code that gives me the error, but there is no
> line 447 in /usr/lib/python2.3/pyclbr.py:

Try deleting pyclbr.py[co].
-- 
Michael Hoffman


From jmeile at hotmail.com  Fri Feb  4 15:52:18 2005
From: jmeile at hotmail.com (Josef Meile)
Date: Fri, 04 Feb 2005 21:52:18 +0100
Subject: Possibly OT: Controlling winamp with Python
In-Reply-To: <O-udnS69k4nmQZ7fRVn-hQ@comcast.com>
References: <JZOdnVLIY48-S57fRVn-hA@comcast.com>	<1107548407.626431.171350@z14g2000cwz.googlegroups.com>
	<O-udnS69k4nmQZ7fRVn-hQ@comcast.com>
Message-ID: <4203E082.8060805@hotmail.com>

Hi Brent,

Brent W. Hughes wrote:
> The Python program won't decide whether a commercial is playing, I will.  At 
> that point, I will run my program which will press mute, wait 20 seconds, 
> and then press mute again.
> 
> Actually, I could leave the program running but minimized to the task bar. 
> When I hear the advertisement, I just click on the program in the task bar. 
> It knows what to do from there.
You don't need python for this. You can use auto-it to achieve the same
thing. You can download it at:
http://www.hiddensoft.com/AutoIt/

It is easy to program and it works nicely. There is also some similar
thing for python. Perhaps a litle bit more complicated (I haven't
tested it):

WATSUP - Windows Application Test System Using Python
http://www.tizmoi.net/watsup/intro.html

Regards,
Josef


From steve at holdenweb.com  Tue Feb  1 20:47:14 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 01 Feb 2005 20:47:14 -0500
Subject: how do i create such a thing?
In-Reply-To: <ctpb18$qpr$1@mughi.cs.ubc.ca>
References: <ctjl2u$2sc$1@mughi.cs.ubc.ca>
	<mailman.1605.1107124128.22381.python-list@python.org>
	<7vGdnTsopcKl-GDcRVn-rw@comcast.com>
	<1gr9b2q.1dlgnok1ayt2zsN%aleaxit@yahoo.com>
	<ctne9j$9jm$1@mughi.cs.ubc.ca>
	<1graydy.kqcv8z136el9pN%aleaxit@yahoo.com>
	<ctpb18$qpr$1@mughi.cs.ubc.ca>
Message-ID: <InWLd.102536$Jk5.23594@lakeread01>

Lowell Kirsh wrote:

> I'm not sure I get it. What's the purpose of using a delegate rather 
> than having the object itself supply the return value?
> 
> Alex Martelli wrote:
> 
>> Lowell Kirsh <lkirsh at cs.ubc.ca> wrote:
>>
>>
>>> What might these exceptions be?
>>>
>>>
>>>> It's HIGHLY advisable to have your __getattr__ methods raise
>>>> AttributeError for any requested name that starts and ends with double
>>>> underscores, possibly with some specific and specifically designed
>>>> exceptions.
>>
>>
>>
>> For example, delegation of such requests to some other object:
>>     def __getattr__(self, name):
>>         return getattr(self._delegate, name)
>>
>> In such cases you may decide you do not need to block __specials__,
>> because you're OK with having self._delegate supply them or be
>> responsible to raise AttributeError if necessary.
>>
>>
>> Alex

The point is that you can keep a reference to some object, and it's the 
next best thing to having subclassed the object's class but with closer 
control.

regards
  Steve

A: Top-posting
Q: What puts things in the wrong order on newsgroup postings
-- 
Meet the Python developers and your c.l.py favorites March 23-25
Come to PyCon DC 2005          http://www.python.org/pycon/2005/
Steve Holden                           http://www.holdenweb.com/


From googlinggoogler at hotmail.com  Sat Feb 12 18:40:19 2005
From: googlinggoogler at hotmail.com (googlinggoogler at hotmail.com)
Date: 12 Feb 2005 15:40:19 -0800
Subject: Text files read multiple files into single file,
	and then recreate the multiple files
In-Reply-To: <420e90fb$0$28978$e4fe514c@news.xs4all.nl>
References: <1108250252.479092.298670@z14g2000cwz.googlegroups.com>
	<420e90fb$0$28978$e4fe514c@news.xs4all.nl>
Message-ID: <1108251619.636256.85030@z14g2000cwz.googlegroups.com>

Would like to use text files, its really for my own learning,

but I suppose a Zip would work 

cheers



From ilias at lazaridis.com  Tue Feb 15 11:01:00 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 18:01:00 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2527.1108384715.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr>
	<cupstp$an7$2@ctb-nnrp2.saix.net>	<cupupa$kfs$2@usenet.otenet.gr>
	<cupvhi$c15$1@news1.ucsd.edu>	<cuq084$r99$1@usenet.otenet.gr>
	<cuq2h0$j2s$1@eeyore.INS.cwru.edu>	<cuq57b$j83$1@usenet.otenet.gr>
	<mailman.2527.1108384715.22381.python-list@python.org>
Message-ID: <cut6bp$ovt$2@usenet.otenet.gr>

Simon Brunning wrote:
> On Mon, 14 Feb 2005 14:23:08 +0200, Ilias Lazaridis <ilias at lazaridis.com> wrote:
> 
> (snip)
> 
> 
>>But if those answers above were of official nature, I must seriously
>>rethink if I can rely on _any_ system which is based on python, as the
>>foundation and the community do not care about essential needs and
>>requirements.
> 
> I couldn't agree more. You need to find a community that *does* care
> about essential needs. Might I recommend Perl or Ruby?

you can review this thread.

[EVALUATION] - E01: The Java Failure - May Ruby Helps?
http://groups-beta.google.com/group/comp.lang.ruby/msg/676a2fbaf48046ac

Currently, I tend more to python, but I don't think that I can keep my 
initial enthusiasm up.

.

-- 
http://lazaridis.com


From cam.ac.uk at mh391.invalid  Sun Feb 20 11:03:08 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sun, 20 Feb 2005 16:03:08 +0000
Subject: introspection inquiry
In-Reply-To: <111hcaqc26f3bbf@news.supernews.com>
References: <1108910710.985704.264430@c13g2000cwb.googlegroups.com>
	<4218A579.2060503@jessikat.fsnet.co.uk>
	<cvaaae$77q$1@gemini.csx.cam.ac.uk>
	<111hcaqc26f3bbf@news.supernews.com>
Message-ID: <cvacbv$bgj$2@gemini.csx.cam.ac.uk>

John Roth wrote:

> If that's the case, then the inspect module should give
> the tools to do it without a great deal of angst. Unfortunately,
> it doesn't give you the class that defined the method, just
> the class that invoked it.

Are you saying that the inspect module *should* give you the
tools to do it but does not?
-- 
Michael Hoffman


From jerf at jerf.org  Tue Feb  8 15:18:54 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 08 Feb 2005 15:18:54 -0500
Subject: turing machine in an LC
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>
	<87mzuf9gu8.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>
	<s9zvf93ovp8.fsf@salmakis.intevation.de>
	<pan.2005.02.08.12.47.00.135408@jerf.org>
	<s9z8y5yq1fp.fsf@salmakis.intevation.de>
Message-ID: <pan.2005.02.08.20.18.54.11711@jerf.org>

On Tue, 08 Feb 2005 20:47:06 +0100, Bernhard Herzog wrote:
>     [x for L in [[[initial_state, 0]]]
>        for state, pos in L
>        if state is not None
>           and (L.append([M[state][T.get(pos, 0)][2],
>                          pos + M[state][T.get(pos, 0)][1]])
>                or T.__setitem__(pos, M[state][T.get(pos, 0)][0]))]
>     return T

I stand corrected!

Thanks for posting it; I wasn't going to ask anyone to produce one, but if
you had one lying around, that's great.

Nice job!


From john at grulic.org.ar  Fri Feb 11 11:52:51 2005
From: john at grulic.org.ar (John Lenton)
Date: Fri, 11 Feb 2005 13:52:51 -0300
Subject: Alternative to raw_input ?
In-Reply-To: <w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>
References: <ozinq3vbstgb.179brgmnanylg.dlg@40tude.net>
	<mailman.2400.1108139722.22381.python-list@python.org>
	<w5s4g87dybwp.1n58ieu34qohy.dlg@40tude.net>
Message-ID: <20050211165251.GB2294@grulic.org.ar>

On Fri, Feb 11, 2005 at 05:37:19PM +0100, BOOGIEMAN wrote:
> On Fri, 11 Feb 2005 16:35:19 +0000, Simon Brunning wrote:
> 
> > Err, why?
> 
> It looks to ugly this way. I want to press 
> any key without ENTER to continue

read the documentation on readline.

Hmm! it says "Availability: Unix". Any particular reason? readline
should be fine on OSX and Win32

-- 
John Lenton (john at grulic.org.ar) -- Random fortune:
sugar daddy, n.:
	A man who can afford to raise cain.
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From enjoylife_95135 at hotmail.com  Wed Feb 23 10:23:45 2005
From: enjoylife_95135 at hotmail.com (Sandman)
Date: 23 Feb 2005 07:23:45 -0800
Subject: running a shell command from a python program
In-Reply-To: <1109170831.815278.243270@f14g2000cwb.googlegroups.com>
References: <1109170831.815278.243270@f14g2000cwb.googlegroups.com>
Message-ID: <1109172225.633997.133320@o13g2000cwo.googlegroups.com>

Doh, use the search Luke:

http://www.wellho.net/forum/Programming-in-Python-and-Ruby/Running-shell-commands-from-Python.html

Seems like popen is the way to go.

S



From kent37 at tds.net  Wed Feb 23 23:44:37 2005
From: kent37 at tds.net (Kent Johnson)
Date: Wed, 23 Feb 2005 23:44:37 -0500
Subject: Like overloading __init__(), but how?
In-Reply-To: <pan.2005.02.24.03.20.40.119047@yahooz.com>
References: <pan.2005.02.24.03.20.40.119047@yahooz.com>
Message-ID: <421d5890$1_1@newspeer2.tds.net>

John M. Gabriele wrote:
> I know that Python doesn't do method overloading like
> C++ and Java do, but how am I supposed to do something
> like this:

This was just discussed. See
http://tinyurl.com/6zo3g

Kent

> 
> --------------------- incorrect ------------------------
> #!/usr/bin/python
> 
> class Point3d:
>       pass
> 
> class Vector3d:
>       """A vector in three-dimensional cartesian space."""
> 
>       def __init__( self ):
>             """Create a Vector3d with some reasonable default value."""
>             x, y, z = 0.0, 0.0, 0.0
> 
> 
>       def __init__( self, x_from, y_from, z_from,
>                           x_to,   y_to,   z_to ):
>             """Create a Vector3d from x-y-z coords."""
>             # ...
>             pass
> 
> 
>       def __init__( self, point_from, point_to ):
>             """Create a Vector3d from two Point3d objects."""
>             # ...
>             pass
>       
> 
>       def __init__( self, same_as_this_vec ):
>             """Create a Vector3d from a copy of another one."""
>             # ...
>             pass
> 
> p = Point3d()
> p2 = Point3d()
> # v = Vector3d( p2, p ) -- Nope. Only the last __init__() counts.
>  
> ---------------------- /incorrect -------------------------------
> 
> Thanks.
> 


From antonmuhin at rambler.ru  Thu Feb 17 12:20:35 2005
From: antonmuhin at rambler.ru (anton muhin)
Date: Thu, 17 Feb 2005 20:20:35 +0300
Subject: multimethod (or rather overloading) in Python
Message-ID: <37k236F5fdtu1U1@individual.net>

Dear pythonistas!

I'd like to emulate overloading in Python (like C++).

Let's consider an example:

class A(object): pass
class B(object): pass

Of course, there are some standard overloading implementations for 
Python. For example:

def overload(cls):
   def wrapper(f):
     gl = f.func_globals

     next = gl.get(f.func_name, failedOverload_(f.func_name))
     def _(obj, *args, **kwargs):
       if isinstance(obj, cls):
         return f(obj, *args, **kwargs)
       else:
         return next(obj, *args, **kwargs)
     return _

@overload(A)
def foo(_): print 'foo at A'


@overload(B)
def foo(_): print 'foo at B'

However, it obviously doesn't work for classes: I cannot overload 
instance methods with such a decorator.

The best way I found is closures. Unfortunatley, in this case I need a hack:

   gl = f.func_globals

turns into:

   gl = sys._getframe(1).f_locals

and with this hack one can make the following trick:

def poorManOverloadedMethods(someInfo):
   @overload(A)
   def _(_): print '%s: poorManOverloadedMethods at A' % someInfo

   @overload(B)
   def _(_): print '%s: poorManOverloadedMethods at B' % someInfo

   return _

PMOM = poorManOverloadedMethods('test')

...

Of course, I can imagine some metaclasses magic that would allow to code:

class MyClass(WithOverloading):
   @overloadMethod(A)
   def someMetod(self, _): ...

But it would rather convoluted: the best idea I have so far is to mangle 
  methods name in the manner most of C++ compilers do.

Is there better way? Can I unify both @overload and @overloadMethod?

with the best regards,
anton.


From Michael.Lang at jackal-net.at  Thu Feb  3 07:14:23 2005
From: Michael.Lang at jackal-net.at (Michael.Lang at jackal-net.at)
Date: Thu, 3 Feb 2005 12:14:23 +0000 (UTC)
Subject: Basic file operation questions
References: <1107379669.870799.256030@g14g2000cwa.googlegroups.com>
	<opsllt9r191js0xs@news.telkomsa.net>
	<mailman.1808.1107431422.22381.python-list@python.org>
Message-ID: <slrnd0459o.nde.michi@michi.si.eunet.at>

In article <mailman.1808.1107431422.22381.python-list at python.org>, Peter Nuttall wrote:
> On Wed, Feb 02, 2005 at 11:47:41PM -0500, Caleb Hattingh wrote:
>> Hi Alex
>> 
>> Assuming you have a file called "data.txt":
>> 
>> ***
>> f = open('data.txt','r')
>> lines = f.readlines()
>> f.close()
>> for line in lines:
>>     print line
>> ***
>>
> 
> Can you not write this:
> 
> f=open("data.txt", "r")
> for line in f.readlines():
> 	#do stuff to line
> f.close()

sure you can 

f = open("data.txt", "rb")
while [ 1 ]:
	line = f.readlines()
	if not line:	break
	line = somethingelse ...
f.close()

> 
> Pete


From fuzzyman at gmail.com  Wed Feb 23 04:14:51 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 23 Feb 2005 01:14:51 -0800
Subject: Style guide for subclassing built-in types?
In-Reply-To: <1109127834.660822.247120@g14g2000cwa.googlegroups.com>
References: <ba1e306f.0502221846.70cb4d5c@posting.google.com>
	<1109127834.660822.247120@g14g2000cwa.googlegroups.com>
Message-ID: <1109150091.356411.150460@l41g2000cwc.googlegroups.com>

I guess print is using the __repr__ (or __str__ ?) methods of lsit -
which you will need to override as well.

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml



From steve at holdenweb.com  Tue Feb 22 17:19:15 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 22 Feb 2005 16:19:15 -0600
Subject: display VARCHAR(mysql) and special chars in html
In-Reply-To: <20050222172241.GB4769@resivo.mejo.net>
References: <mailman.2900.1109014601.22381.python-list@python.org>	<3807siF5g9t1cU1@individual.net>
	<20050222172241.GB4769@resivo.mejo.net>
Message-ID: <cvgat7$r4i$1@sea.gmane.org>

Jonas Meurer wrote:

> On 22/02/2005 Radovan Garabik wrote:
> 
>>>i could write a function to parse the comment and substitute special
>>>chars with the relevant html code, but maybe this already exists in some
>>>module?
>>
>>just make the page in utf-8, and you'll save you a lot of troubles
> 
> 
> ok, how do i do this? simply add a second line with this:?
> # -*- encoding: utf-8 -*-
> 
> i use utf8 locales on my machine anyway.
> 
> 
>>>if not, it'll be hard work, as i've to consider many special chars, and
>>>at least iso-8859-1* and utf-8 as charmaps.
>>
>>if you insist...
>>a = u'\u010c'
>>a.encode('ascii', 'xmlcharrefreplace')
> 
> 
> this fails as the comment contained several chars that couldn't be
> converted.
> 
> i've changed my plans, and now will transform the comments to html
> before saving them in mysql. this way, the comment never contains
> special chars except they weren't filtered out when safed in mysql.
> 
> do any filters exist, to transform plain text to html? otherwise i might
> use third-party products, as text2html.
> 
> what do you think?
> 
I think you should store your data with a known encoding, then encode it 
as necessary for transmission. That way you can provide it in the forms 
most relevant to different clients.

regards
  Steve



From dbickett at gmail.com  Sat Feb  5 20:39:35 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Sat, 5 Feb 2005 20:39:35 -0500
Subject: Definitive documentation on newstyle classes? (WAS: Pickling
	and inheritance are making me hurt)
In-Reply-To: <42057236$0$599$636a15ce@news.free.fr>
References: <mailman.2001.1107650814.22381.python-list@python.org>
	<42057236$0$599$636a15ce@news.free.fr>
Message-ID: <1d6cdae30502051739565e9257@mail.gmail.com>

Bruno Desthuilliers wrote:
> Well, the fact is that __[get|set]state__() have nothing to do with new
> style classes, but with the Pickle protocol:
> http://www.python.org/doc/2.3.4/lib/pickle-inst.html

Thank you for pointing that out, but all the same ;)

-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From kid at kendermedia.com  Wed Feb  2 13:17:16 2005
From: kid at kendermedia.com (Kevin Dangoor)
Date: Wed, 02 Feb 2005 13:17:16 -0500
Subject: XML with Unicode: what am I doing wrong?
Message-ID: <4201192C.2030906@kendermedia.com>

This is a followup to a blog post I wrote the other day
http://www.blueskyonmars.com/archives/2005/01/31/using_unicode_with_elementtidy.html

I started out working in the context of elementtidy, but now I am 
running into trouble in general Python-XML areas, so I thought I'd toss 
the question out here. The code below is fairly self-explanatory. I have 
a small HTML snippet that is UTF-8 encoded and is not 7-bit ASCII 
compatible. I use Tidy to convert it to XHTML, and this particular setup 
returns a unicode instance rather than a string.

import _elementtidy as et
from xml.parsers import expat

data = unicode(open("snippetWithUnicode.html").read(), "utf-8")
html = et.fixup(data)[0]
parser = expat.ParserCreate()
parser.Parse(html)

UnicodeEncodeError: 'ascii' codec can't encode character '\ub5' in 
position 542: ordinal not in range(128)

If I set my default encoding to utf8 in sitecustomize.py, it works just 
fine. I'm thinking that I can't be the only one trying to pass unicode 
to expat... Is there something else I need to do here?

Thanks,
Kevin
Blazing Things


From keith.veleba at gmail.com  Mon Feb  7 14:57:02 2005
From: keith.veleba at gmail.com (Keith Veleba)
Date: 7 Feb 2005 11:57:02 -0800
Subject: Synchronizing methods of a class
Message-ID: <1107806222.385926.235060@o13g2000cwo.googlegroups.com>

Hello to all fellow c.l.p'ers!

Long-time listener, first-time caller.

Background:
I'm working on a project where I have to do some serious
multithreading. I've worked up a decorator in Python 2.3.4 to implement
the lock semantics required for specific functions I want to
synchronize:

def synchronized(method):
	def f(*args,**kwargs):
		self = args[0]
		self._lock.acquire();
		try:
			return method(*args,**kwargs)
		finally:
			self._lock.release()
	return f

And a convenience method to synchronize all methods of a given class:

def synchronize(klass, allow=None, deny=None):
	"""Synchronize methods in the given class
	Only synchronize the methods whose names are
	not in the deny list,in the allow list, or all methods if allow and
deny are not specified.."""
	if deny is None: deny=[]
	deny.append('__init__')
	for (name, val) in klass.__dict__.items():
		print "attr '%s':" % (name),
		if callable(val):
			if name not in deny:
				if allow is None or name in allow:
					klass.__dict__[name] = synchronized(val)
					print "synchronized."
				else:
					print "not synchronizing, name not in allow list" % name
			else:
				print "not synchronizing, name in deny list."
		else:
			print "not synchronizing, not callable."
	return klass

Obviously, my classes have to instantiate the _lock in __init__ in
order for this to work.

Problem:

When iterating through klass.__dict__.items() in the convenience
method, I only get the instance variables of the class.  No functions.
I've found a way to get the function list, by iterating through
klass.__class__.__dict__ .

My Question:

If I decorate these function references in __class__.__dict__, am I
doing it only for my specific instance of that class or the base class
as well? 

Thanks in advance,
Keith Veleba



From vincent at visualtrans.de  Fri Feb 18 00:49:09 2005
From: vincent at visualtrans.de (Vincent Wehren)
Date: Fri, 18 Feb 2005 06:49:09 +0100
Subject: win2k multiple versions config question
In-Reply-To: <1108670228.344749.149550@g14g2000cwa.googlegroups.com>
References: <1108670228.344749.149550@g14g2000cwa.googlegroups.com>
Message-ID: <cv3vkl$fom$1@news4.zwoll1.ov.home.nl>

rzantow at ntelos.net wrote:
> I currently have both 2.3 and 2.4 on my Win2k computer. For the most
> part, I've been able to run each version, but I'm not configured
> completely correctly and I've run into a snafu. I downloaded LGT to try
> it out today; it uses PyGame (which as far as I know doesn't work with
> 2.4 yet -- or am I wrong here?), and OpenGL, and maybe has other
> dependencies. At any rate, the error I am seeing apparently involves
> OpenGL, and looks like this:
> 
> Traceback (most recent call last):
>   File "D:\Dld\LGT\doc\dev_pygame.py", line 3, in ?
>     import LGT
>   File "..\LGT\__init__.py", line 2, in ?
>     import video
>   File "..\LGT\video.py", line 1, in ?
>     from OpenGL.GL import *
>   File "d:\Python23\lib\site-packages\OpenGL\__init__.py", line 26, in
> ?
>     from GL.GL__init___ import __numeric_present__, __numeric_support__
>   File "d:\Python23\lib\site-packages\OpenGL\GL\__init__.py", line 2,
> in ?
>     from GL__init__ import *
>   File "d:\Python23\lib\site-packages\OpenGL\GL\GL__init__.py", line 2,
> in ?
>     import GL__init___
> ImportError: Module use of python23.dll conflicts with this version of
> Python.
> 
> I'm not sure what "this version" of Python should be here. I have a
> Pythonpath that refers to the 2.3 tree; neither 2.3 nor 2.4 is
> referenced in my Path variable. There is no evident reference to 2.4
> active (at least not that I can find). The message seems to be telling
> me that the OpenGL module uses 2.3, which should be correct, but maybe
> I'm reading it wrong. Can anybody set me on the right track here?
> 

When you enter "python" in the command line, does python 2.4 appear, or
python 2.3? If it's 2.4, be explicit about wanting 2.3 and run the 
script like so:

d:\Python23\python name_of_scriptfile.py



HTH,

--
Vincent Wehren


From deetsNOSPAM at web.de  Mon Feb 14 05:22:17 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 14 Feb 2005 11:22:17 +0100
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr>
	<1108370491.792820.142200@z14g2000cwz.googlegroups.com>
	<cuprg2$6rt$1@usenet.otenet.gr>
Message-ID: <37bcdkF5bg7knU1@individual.net>

Ilias Lazaridis wrote:

> [please check your news-client. For some reason, the tag "[EVALUATION]"
> was removed]
> 
> I want to develope large scale applications, and for this I need an
> stable official version of the python language, either binary or
> produced directly out of official sources, completely with an
> open-source tool-chain.

Where does that requirement come from? If you want to create large scale
apps, the price for a msvc++ compiler shouldn't matter. And: Windows is a
non-free platform at first. If you have to or want to develop on top of it,
be prepared to pay. Its as simple as that. If you want something cheaper -
you'll have to put some effort into it. Or use linux.

Additionally, your point is moot because there is no need for python _core_
developers or the foundation to support every imaginable platform/compiler
combination. Instead this can be done by companies - see activestate. So if
you want it, step up and do it yourself so your work _becomes_ the official
mingw port. Community gratitude would be guaranteed.

-- 
Regards,

Diez B. Roggisch


From jepler at unpythonic.net  Sun Feb 13 22:14:58 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Sun, 13 Feb 2005 21:14:58 -0600
Subject: SCons build tool speed
In-Reply-To: <v8KdnVGnB5AlnI3fRVn-sw@powergate.ca>
References: <SBsPd.4406$ZZ.3056@newssvr23.news.prodigy.net>
	<gOOdnTpZnaZCVJPfRVn-3w@powergate.ca>
	<1108309756.236396.201830@o13g2000cwo.googlegroups.com>
	<v8KdnVGnB5AlnI3fRVn-sw@powergate.ca>
Message-ID: <20050214031456.GA6339@unpythonic.net>

On Sun, Feb 13, 2005 at 08:39:10PM -0500, Peter Hansen wrote:
> That answer, combined with Mike's response pointing out
> that tools more sophisticated than basic "make" actually
> can delve into the source and identify the dependencies,

Argh argh argh.

Of course you can write a makefile to "delve into the source and
identify the dependencies".  And, by the way, there's no need for make
to be recursive when a project spans multiple directories. (the other
popular misconception about make)

Below is a GNU makefile that I use to build a small program.  I
re-organized the file a bit before posting to clearly separate the two
sections of the makefile, and it's possible I broke something in the
process.

Since my system has subsecond file timestamps and I do not build with source
or object files on network filesystems, the "timestamp comparison"
method works just fine to decide whether a target must be rebuilt or
not.

What programs like SCons *do* is include nice built-in definitions of
stuff like the 'obj/%.d: %.cc' rule (often with a built-in parser which
you can bet will not be 100% compatible with your compiler!), built-in
inclusion of dependency lists with no extra programmer action, and the
features I don't need like the use of cryptographic hashes to compare
files.

A larger system I work on uses GNU make to build around 6000 object
files into a single executable.  A "do-nothing" make takes around 8
seconds on a 2.8GHz machine.  This involves parsing about 6000 lines of
Makefiles and Submakefiles (per-directory lists of source files), and
about 650klines of dependency information.

I don't know how this measures up to "modern" tools like SCons.  I'd be
curious to know.

But it's my opinion that a well-designed "make library" and/or "make
preprocessor" to go with GNU Make would be right up there with SCons in
its "power", while avoiding the need for a tool that most people have
never heard of and don't already have installed on their system (yes, a
pretty Linux-centric view).

One criticism of Make that I'd take seriously is that it's a
domain-specific language and usually I say those are terrible ideas.  I
still have to refer to the manual to remember which of $*, $@, $^ or $<
I need, sometimes, even though I've been a GNU Make power user for two
years now.

Jeff


#------------------------------------------------------------------------
# This section of the makefile names the source files (one in this case)
# and other complier options.  It also has a rule for linking the target
# program
default: stippler
LFLAGS := -L/usr/X11R6/lib 
LIBS := -lGL -lGLU -lglut -lXi -lXmu -lX11 -lm -lnetpbm
SRCS := main.cc
CFLAGS := -mcpu=pentium4 -O0 -g -DOUTPUT_POSTSCRIPT

stippler: $(OBJS)
        $(CCLD) $(LFLAGS) -o $@ $^ $(LIBS)

#------------------------------------------------------------------------
# This section, which is essentially boilerplate, says how to generate
# the list of dependencies or the object file from a given source file.  
# It also transforms the list of sources into a list of objects, and
# includes all the necessary dependency lists ("dot d files")
#
# The definition of OBJS would be more complex if source files of
# different types exist (.c and .cc files, for example)
OBJS := $(patsubst %.cc, obj/%.o, $(SRCS))
CCLD := $(CC)
include $(patsubst %.o,%.d,$(OBJS))

obj/%.d: %.cc
        mkdir -p $(dir $@)
        $(CC) -MM -MG -MT "$@ $(patsubst obj/%.d,obj/%.o,$@)" \
                $(CFLAGS) $< -o $@.tmp && mv -f $@.tmp $@

obj/%.o: %.cc
        $(CC) $(CFLAGS) -c $< -o $@.tmp && mv -f $@.tmp $@
#------------------------------------------------------------------------
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From mwm at mired.org  Sat Feb 26 20:46:59 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 26 Feb 2005 19:46:59 -0600
Subject: [perl-python] generate all possible pairings
References: <1109467591.827686.95540@f14g2000cwb.googlegroups.com>
Message-ID: <86650eg4fg.fsf@guru.mired.org>

"Xah Lee" <xah at xahlee.org> writes:

> This is brought to you by the perl-python community. To subscribe, see
> http://xahlee.org/perl-python/python.html

assert len(perl-python community) == 1

       <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From almad at include.cz  Mon Feb 28 17:31:27 2005
From: almad at include.cz (Almad)
Date: Mon, 28 Feb 2005 23:31:27 +0100
Subject: ZoDB's capabilities
Message-ID: <d00640$1o6o$1@news.vol.cz>

Hello, 

I'm going to write a custom CMS. I'd like to use some odbms, as code is then
much more cleaner...however, i'm a little bit scared about capabilities of
ZoDB, when compared with f. e. Firebird. 
How much instances is Zodb able to handle? Under "handle" I mean "in real
time", not "theoretically". I'd like to use it for dynamic portal with
about 2000 - 3000 UIP / day. 

And, how is it with stability and crash recovery? I can't find some more
sources about zodb, when there are some other sources then those on Zope,
please tell me. Or, please tell me if you knew some better odbms engine ^_^

Thanks, 
-- 
Lukas "Almad" Linhart

[:: http://www.almad.net/ ::]
[:: Humans are too complicated to be described with words. ::]
[:: PGP/GNUPg key: http://www.almad.net/download/pubkey.asc ::]


From tzot at sil-tec.gr  Mon Feb 28 03:32:56 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Mon, 28 Feb 2005 10:32:56 +0200
Subject: netmask arithmetic?
References: <pan.2005.02.26.01.21.59.135616@dcs.nac.uci.edu>
	<RDXTd.21126$2G7.2687044@phobos.telenet-ops.be>
Message-ID: <r4l52113u1uere0bfesvu219p1jvi4ulpg@4ax.com>

On Sat, 26 Feb 2005 09:50:41 GMT, rumours say that Roel Schroeven
<rschroev_nospam_ml at fastmail.fm> might have written:

>Dan Stromberg wrote:
>> Before I go and reinvent the wheel, does anyone already have python code
>> that can do netmask arithmetic - for example, determining if a list of
>> hostnames are on subnets described by a list of networks+netmasks like:
>> 
>> 128.200.34.0/24
>> 128.195.16.128/25
>> 
>> ...and so on?

[Roel]
>http://pynms.sourceforge.net/ipv4.html

Damn... when I'd searched I didn't find anything, so I reinvented the wheel in

http://www.sil-tec.gr/~tzot/python/IPv4_Utils-0.35.linux-i586.tar.gz

It seems that ipv4 from pynms almost matches the functionality of my module,
except for a function (included_nets): given two hosts/nets, find the minimal
set of networks that include both hosts/nets.  Just in case Dan needs such a
function.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From administrata at hotmail.com  Wed Feb 16 16:11:46 2005
From: administrata at hotmail.com (administrata)
Date: 16 Feb 2005 13:11:46 -0800
Subject: problem with tutor mailing
Message-ID: <614c778e.0502161311.619e98bf@posting.google.com>

i'm using tutor maling...

i e-mail some questions to tutor and

get answers.

but, i frequently get mails which aren't related with my question.

how should i stop it?


From reinhold-birkenfeld-nospam at wolke7.net  Sat Feb 19 12:26:56 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Sat, 19 Feb 2005 18:26:56 +0100
Subject: [perl-python] exercise: partition a list by equivalence
In-Reply-To: <1108814276.680736.264380@l41g2000cwc.googlegroups.com>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<1108814276.680736.264380@l41g2000cwc.googlegroups.com>
Message-ID: <37pb5jF5fnfivU1@individual.net>

Xah Lee wrote:
> here's the answer to the partition by equivalence exercise.

Your Python solution is, as expected, wrong (try with
[[10, 8], [7, 3], [1, 7], [5, 4], [2, 2], [3, 8], [7, 10], [2, 3], [6,
10], [3, 2]]
for example).

The solution by John Lenton is wrong, too.

The solution by Brian Beck delivers the correct result for most input,
but for some input lists like
[[3, 3], [8, 7], [3, 2], [8, 5], [5, 6], [6, 3], [10, 8], [8, 10], [4,
10], [10, 2]]
it chokes and returns the empty list.

My solution (which may not be the fastest or most effective, but till
now is the shortest <wink> and it works):

def merge(pairings):
    sets = {}
    for x1, x2 in pairings:
        newset = (sets.get(x1, frozenset([x1]))
                  | sets.get(x2, frozenset([x2])))
        for i in newset:
            sets[i] = newset

    return [list(aset) for aset in set(sets.itervalues())]


Reinhold


From grante at visi.com  Mon Feb 21 23:42:59 2005
From: grante at visi.com (Grant Edwards)
Date: 22 Feb 2005 04:42:59 GMT
Subject: copying or moving the mail message using imaplib
References: <1109044151.869953.187270@c13g2000cwb.googlegroups.com>
	<mailman.2918.1109045457.22381.python-list@python.org>
	<1109046578.692118.24350@l41g2000cwc.googlegroups.com>
Message-ID: <421ab853$0$44647$a1866201@visi.com>

On 2005-02-22, Raghul <raghulj at gmail.com> wrote:

> Thanks for ur message .How it is possible to copy the  messages betwwen
> folder ?I can't understand the copy function in python documentation.

Maybe you should take a look at the RFC for IMAP4:

http://www.faqs.org/rfcs/rfc2060.html

The UID command is documented in section 6.4.8.  It looks
fairly clear to me.

-- 
Grant Edwards                   grante             Yow!  Mr and Mrs PED, can
                                  at               I borrow 26.7
                               visi.com            


From seejadee at gmail.com  Wed Feb  2 19:10:16 2005
From: seejadee at gmail.com (Marcos)
Date: 2 Feb 2005 16:10:16 -0800
Subject: managing multiple subprocesses
Message-ID: <1107389416.531437.227160@l41g2000cwc.googlegroups.com>

Hi guys,
I realise this question has been answered in one form or another many
times before but I can't quite find the solution I need. I am trying to
run multiple subprocesses from a python script and then wait until all
subprocesses have completed before continuing. The subprocesses run on
other machines ie this is a coarse grained parallel computation task.

So the commands I am using are:
for x in range(0, limit):
os.system("xgrid .... ./someprogram %d &" % x)

and then to check whether they are all finished I do a very crude:

joblist = commands.getoutput("xgrid .... -job list")
while joblist != "{jobArray = (); }":
time.sleep(1)
joblist = commands.getoutput("xgrid .... -job list")

Xgrid is a system for parallel computation on Mac OS X. It is quite
good, check it out at www.apple.com/acg/xgrid. But anyway the method I
am using above, while it works, it quite often hangs. I'd like to just
run all the subprocesses at once and then check within the script,
rather than an auxilliary, to see if everything has returned. The
output of the commands is not important as that gets redirected to
files outside the script. I have tried all sorts of popens / excevs /
os.systems / commands etc etc. I realise the subprocess module may have
what I need but I can't get python 2.4 on the Mac so I need a 2.3 based
solution. Any help is much appreciated. Cheers.



From xah at xahlee.org  Sun Feb 20 04:15:25 2005
From: xah at xahlee.org (Xah Lee)
Date: 20 Feb 2005 01:15:25 -0800
Subject: [perl-python] exercise: partition a list by equivalence
In-Reply-To: <37pb5jF5fnfivU1@individual.net>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<1108814276.680736.264380@l41g2000cwc.googlegroups.com>
	<37pb5jF5fnfivU1@individual.net>
Message-ID: <1108890925.941814.45860@g14g2000cwa.googlegroups.com>

when i try to run the following program, Python complains about some
global name frozenset is not defined. Is set some new facility in
Python 2.4?

?# from Reinhold Birkenfeld
?def merge(pairings):
?    sets = {}
?    for x1, x2 in pairings:
?        newset = (sets.get(x1, frozenset([x1]))
?                  | sets.get(x2, frozenset([x2])))
?        for i in newset:
?            sets[i] = newset
?
?    return [list(aset) for aset in set(sets.itervalues())]

it would be nice if the two working programs do not use some package.
This problem shouldn't need to.

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From fortepianissimo at gmail.com  Thu Feb  3 10:48:02 2005
From: fortepianissimo at gmail.com (fortepianissimo)
Date: 3 Feb 2005 07:48:02 -0800
Subject: Computing class variable on demand?
In-Reply-To: <6eydnSAjiuofW5zfRVn-sw@comcast.com>
References: <1107410898.260491.203090@l41g2000cwc.googlegroups.com>
	<6eydnSAjiuofW5zfRVn-sw@comcast.com>
Message-ID: <1107445682.239962.284660@o13g2000cwo.googlegroups.com>

This seems to be what I need. My use case is to do lengthy
intialization as late as possible. In this case this is to initialize
class variables. Does this make sense?

Thank you.



From s_t_a_n_i at yahoo.com  Sat Feb  5 15:57:02 2005
From: s_t_a_n_i at yahoo.com (http://www.stani.be)
Date: 5 Feb 2005 12:57:02 -0800
Subject: Which IDE supports python and wxpython?
References: <oS8Nd.4231$bw.168035@phobos.telenet-ops.be>
Message-ID: <1107637022.895865.277280@l41g2000cwc.googlegroups.com>

Try SPE, I just released (GPL) a new version: http://spe.pycs.net

Stani

http://www.stani.be



From mahs at telcopartners.com  Fri Feb 25 18:32:04 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 25 Feb 2005 15:32:04 -0800
Subject: Converting HTML to ASCII
In-Reply-To: <86is4gfim2.fsf@guru.mired.org>
References: <20050225185147.43095.qmail@web20703.mail.yahoo.com>	<mailman.3068.1109361513.22381.python-list@python.org>
	<86is4gfim2.fsf@guru.mired.org>
Message-ID: <cvoc9p$f16$1@sea.gmane.org>

Mike Meyer wrote:

> 
> It also fails on tags with a ">" in a string in the tag. That's
> well-formed but ill-used HTML.
> 
>             <mike
True enough...however, it doesn't fail too horribly:
  >>> striptags("""<sometag attribute = '>'>the text</sometag>""")
  "'>the text"
  >>>
and I think that case could be rectified rather easily, by stripping any content 
up to '>' in the result without breaking anything else.

BTW, I tool a first look at BeautifulSoup.  As far as I could tell, there is no
built-in way to extract text from its parse tree, however adding one is trivial:

  >>> from bsoup import BeautifulSoup, Tag
  ...
  >>> def extracttext(obj):
  ...     if isinstance(obj,Tag):
  ...         return "".join(extracttext(c) for c in obj.contents)
  ...     else:
  ...         return str(obj)
  ...
  >>> def bsouptext(text):
  ...     souptree = BeautifulSoup(text)
  ...     bodytext = extracttext(souptree.first())
  ...     text = re.sub(comments,'', bodytext)
  ...     text = collapsenewlines(text)
  ...     return text
  ...
  ...
  >>>

  >>> bsouptext("""<sometag attribute = '>'>the text</sometag>""")
  "'>the text"

On one 'real world test' (nytimes.com), I find the regexp approach to be more 
accurate, but I won't load up this message with the output to prove it ;-)

Michael




From peter at engcorp.com  Tue Feb 15 17:02:52 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 15 Feb 2005 17:02:52 -0500
Subject: some qustions on python
In-Reply-To: <opsl9ohb0q1js0xs@news.telkomsa.net>
References: <mailman.2640.1108491417.22381.python-list@python.org>
	<opsl9ohb0q1js0xs@news.telkomsa.net>
Message-ID: <kPOdnQkRrrOY74_fRVn-hQ@powergate.ca>

Caleb Hattingh wrote:
> On Tue, 15 Feb 2005 13:16:53 -0500, samar bazied 
> <smile-s at alloymail.com>  wrote:
>> Hi..
>> plz
>> can u help me??
>> I am very new in python and I have some qustions about it.
>> can u give me design process of python and their related langauges?
>> and I will be very habby if u give me small evaluation of python>>
>> plz..
>> plz...
>> plz....
>> help me..

 > http://www.python.org

No to mention http://www.catb.org/~esr/faqs/smart-questions.html


From max at alcyone.com  Tue Feb  1 22:07:47 2005
From: max at alcyone.com (Erik Max Francis)
Date: Tue, 01 Feb 2005 19:07:47 -0800
Subject: [perl-python] string pattern matching
In-Reply-To: <mailman.1721.1107311632.22381.python-list@python.org>
References: <1107290707.549792.199860@c13g2000cwb.googlegroups.com><mailman.1716.1107300060.22381.python-list@python.org><2uWdnWyp5M1Fip3fRVn-sQ@rogers.com>	<fbydnQJ8DNSthJ3fRVn-pw@speakeasy.net>
	<mailman.1721.1107311632.22381.python-list@python.org>
Message-ID: <dtmdnT4zcoyZ2Z3fRVn-jQ@speakeasy.net>

Daniel Fackrell wrote:

> It seems to me that application of one of these solutions reduces the
> effectiveness of the other.  If enough persons killfile the threads, who
> warns the newbies?  And so those who don't killfile the threads to ensure
> that somebody is still guarding against misleading information to newbies
> continue dealing with it manually.

My point was, a sufficiently persistent pest will always generate enough 
dissatisfaction to get people pointing out his uselessness.  Even when 
others killfile him, there will be those that stick around to point out 
his foolishness to others, including any newbies who might otherwise 
conclude that Xah Lee knows what the hell he's talking about.

And, in fact, that's exactly what we're seeing.  It just seems to me 
that any further institutionalization of criticism of Xah Lee's posts is 
unnecessary; it's already being handled, at low levels of annoyance that 
can be avoided by anyone with a killfile or mail filter.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   Divorces are made in Heaven.
   -- Oscar Wilde


From fabioz at esss.com.br  Thu Feb  3 13:57:25 2005
From: fabioz at esss.com.br (Fabio Zadrozny)
Date: Thu, 03 Feb 2005 15:57:25 -0300
Subject: ANN: PyDev 0.9.0 released
Message-ID: <42027415.6040001@esss.com.br>

Hi All,

PyDev - Python IDE (Python development enviroment for Eclipse) version 
0.9.0 has just been released.

This release supports python 2.4 and has PyLint 0.6 integrated.
Code completion had some improvements too.

Check the homepage for more details (http://pydev.sourceforge.net/).

Regards,

Fabio Zadrozny
------------------------------------------------------
Software Developer
ESSS - Engineering Simulation and Scientific Software
www.esss.com.br



From Serge.Orlov at gmail.com  Thu Feb 10 13:35:27 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: 10 Feb 2005 10:35:27 -0800
Subject: sre is broken in SuSE 9.2
In-Reply-To: <mailman.2299.1108029731.22381.python-list@python.org>
References: <mailman.2299.1108029731.22381.python-list@python.org>
Message-ID: <1108060527.378911.146240@o13g2000cwo.googlegroups.com>

Denis S. Otkidach wrote:
> On all platfroms \w matches all unicode letters when used with flag
> re.UNICODE, but this doesn't work on SuSE 9.2:
>
> Python 2.3.4 (#1, Dec 17 2004, 19:56:48)
> [GCC 3.3.4 (pre 3.3.5 20040809)] on linux2
> Type "help", "copyright", "credits" or "license" for more
information.
> >>> import re
> >>> re.compile(ur'\w+', re.U).match(u'\xe4')
> >>>
>
> BTW, is correctly recognize this character as lowercase letter:
> >>> import unicodedata
> >>> unicodedata.category(u'\xe4')
> 'Ll'
>
> I've looked through all SuSE patches applied, but found nothing
> related. What is the reason for broken behavior?  Incorrect
> configure options?

To summarize the discussion: either it's a bug in glibc or there is an
option to specify modern POSIX locale. POSIX locale consist of
characters from the portable character set, unicode is certainly
portable. 

  Serge.



From danperl at rogers.com  Sun Feb  6 18:53:29 2005
From: danperl at rogers.com (Dan Perl)
Date: Sun, 6 Feb 2005 18:53:29 -0500
Subject: Python versus Perl ?
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
	<slrnd0cofg.rr5.jgrahn-nntq@frailea.sa.invalid>
	<1107726328.158314.265680@o13g2000cwo.googlegroups.com>
	<mailman.2038.1107727355.22381.python-list@python.org>
	<1grl63x.1f2tzwz1q984vpN%aleaxit@yahoo.com>
Message-ID: <IaGdnQHUtfVhMJvfRVn-gQ@rogers.com>


"Alex Martelli" <aleaxit at yahoo.com> wrote in message 
news:1grl63x.1f2tzwz1q984vpN%aleaxit at yahoo.com...
> snacktime <snacktime at gmail.com> wrote:
>
>> The one drawback coming from the perl world is that you don't have as
>> many options when it comes stuff like application frameworks, and some
>
> URK -- _my_ feeling is that we have entirely *too many* options for
> stuff like web application frameworks, GUI toolkits, XML processing, ...

Alex's comment resonates so much with me right now that I propose it for 
QOTW. 




From gsakkis at rutgers.edu  Fri Feb 11 18:55:05 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: Fri, 11 Feb 2005 18:55:05 -0500
Subject: Python in EDA
References: <1108165423.522756.151000@z14g2000cwz.googlegroups.com>
Message-ID: <374uuqF5a3t0nU1@individual.net>

<vsapre80 at gmail.com> wrote in message news:1108165423.522756.151000 at z14g2000cwz.googlegroups.com...
> Hi,
>
> I am new to Python and coming from the EDA/VLSI Design background.
>
> I wanted to know if there are some active projects going on EDA modules
> written in Python.
>
> Usually, use of scripting tools in VLSI Design is on a per-project
> basis and rarely reaches the level of a general framework, mostly due
> to extensibility and speed performance limitations. That Python
> overcomes atleat one of them...may be a good reason to look at Python
> based EDA.
>
> I was interested in knowing if such efforts are on. Apart from that
> also any input on EDA softwares using Python will be useful.
>
> regards,
> Vishal
>

GIYF (Google Is Your Friend):
http://www-cad.eecs.berkeley.edu/~pinhong/scriptEDA/

Regards,
George




From xah at xahlee.org  Sat Feb 26 16:25:22 2005
From: xah at xahlee.org (Xah Lee)
Date: 26 Feb 2005 13:25:22 -0800
Subject: function expression with 2 arguments
In-Reply-To: <98ydnSp0COmeLr3fRVn-jQ@powergate.ca>
References: <1109419984.213993.49280@f14g2000cwb.googlegroups.com>
	<98ydnSp0COmeLr3fRVn-jQ@powergate.ca>
Message-ID: <1109453122.034646.290200@z14g2000cwz.googlegroups.com>

lambda x, y: x + y

that's what i was looking for.

... once i have a lambda expr, how to apply it to arguments?

e.g. in Mathematica
Function[#1+#2][a,b]

Python doc is quite confounded in it's way of organization centered
around implementation tied to hardware (as most imperative languages
are hardware-centric), as opposed to algorithm math concepts.

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html



From enleverlesO.OmcO at OmclaveauO.com  Sun Feb 13 05:29:52 2005
From: enleverlesO.OmcO at OmclaveauO.com (Do Re Mi chel La Si Do)
Date: Sun, 13 Feb 2005 11:29:52 +0100
Subject: [NooB] a Variable in multiple quotes...
References: <614c778e.0502130204.5824cddf@posting.google.com>
Message-ID: <420f2c4d$0$19401$8fcfb975@news.wanadoo.fr>

It's OK for me


@-salutations
-- 
Michel Claveau




From tundra at tundraware.com  Wed Feb  2 17:18:13 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 02 Feb 2005 17:18:13 EST
Subject: Generating .pyc/.pyo from a make file
Message-ID: <4308d2-0801.ln1@eskimo.tundraware.com>

I use a makefile to create distribution tarballs of freestanding Python
programs and their documentation.  I cannot seem to find the right
command line option to just generate a pyc/pyo file from the program
and then exit.  If I use 'python -OOOO -c"import myprog"' it creates
the pyo file, but myprog starts up and keeps running.

IOW, I need a batch method for generating compiled python.  I know it
exists, but I can't find it for some reason ...

TIA,
-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/



From quentel.pierre at wanadoo.fr  Fri Feb 11 01:35:43 2005
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Fri, 11 Feb 2005 07:35:43 +0100
Subject: convert list of tuples into several lists
In-Reply-To: <QrOdnf4DLK2hjpbfRVn-hw@comcast.com>
References: <cud40u$vqb$01$1@news.t-online.com>
	<36uihlF58p63iU1@individual.net>
	<1107998078.610891.111510@z14g2000cwz.googlegroups.com>
	<QrOdnf4DLK2hjpbfRVn-hw@comcast.com>
Message-ID: <420c5241$0$6619$8fcfb975@news.wanadoo.fr>

Steven Bethard a ?crit :
> Cappy2112 wrote:
> 
>> What does the leading * do?
> 
> 
> Tells Python to use the following iterable as the (remainder of the) 
> argument list:
> 

Could someone explain why this doesn't work :

Python 2.3.2 (#49, Oct  2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)] on 
win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> def f(*args,**kw):
...     print args, kw
...
 >>> f(*[1,2])
(1, 2) {}
 >>> f(*[1,2],x=1)
   File "<stdin>", line 1
     f(*[1,2],x=1)
              ^
SyntaxError: invalid syntax
 >>>

Pierre


From fredrik at pythonware.com  Sat Feb  5 07:17:35 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 5 Feb 2005 13:17:35 +0100
Subject: a type without a __mro__?
References: <1grid1l.7goks6hh1l6yN%aleaxit@yahoo.com>
Message-ID: <cu2dem$t7p$1@sea.gmane.org>

Alex Martelli wrote:

> Can anybody suggest where to find (within the standard library) or how
> to easily make (e.g. in a C extension) a type without a __mro__, except
> for those (such as types.InstanceType) which are explicitly recorded in
> the dispatch table copy._deepcopy_dispatch...?

something like this?

>>> import re
>>> x = re.compile("")
>>> x
<_sre.SRE_Pattern object at 0x00B2F7A0>
>>> x.__mro__
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: __mro__
>>> import copy
>>> type(x) in copy._deepcopy_dispatch
False

</F> 





From ashot at removemolsoftthis.com  Wed Feb  2 23:53:26 2005
From: ashot at removemolsoftthis.com (Ashot)
Date: Wed, 02 Feb 2005 22:53:26 -0600
Subject: IDLE history, Python IDE, and Interactive Python with Vim
References: <opsllommgvb1cml1@ashot>
	<1d6cdae305020219434e814e86@mail.gmail.com>
	<mailman.1793.1107405675.22381.python-list@python.org>
Message-ID: <opsllujcprej1m1c@ashot>

WingIDE looks nice though, and it seems that the interactive shell is  
built in from the screenshots.  Can you run a program to a certain point  
break point and use the shell?

On Wed, 02 Feb 2005 23:40:40 -0500, Stephen Waterbury <golux at comcast.net>  
wrote:

> Daniel Bickett wrote:
>> This is certainly a worthy topic. There are several IDEs for Python
>> (one I like very much being Komodo) that have plenty of fancy
>> debugging features and advanced operations, however I have yet to
>> encounter (elsewhere) the convenience that comes with being able to
>> press F5 and have an interactive interpreter load my code and be ready
>> for testing.
>
> *Sigh*, I too am a vi kinda guy, and I keep badgering the WingIDE
> gang to give Wing a vi mode ... :)  They keep saying "it's coming",
> but it's been a while ... and in fairness to them, I don't think
> there is exactly a huge horde of vi barbarians at their gate!
> Probably a pretty tiny horde, and not very noisy.  ;)
>
> Steve



-- 
==============================
Ashot Petrosian
University of Texas at Austin, Computer Sciences
(views expressed are solely my own)
==============================


From deetsNOSPAM at web.de  Wed Feb  2 04:19:41 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 02 Feb 2005 10:19:41 +0100
Subject: Save the Canvas!
References: <e5063e96.0502011615.2d182c77@posting.google.com>
Message-ID: <36bk44F4pqdc5U1@individual.net>

Sean McIlroy wrote:

> I'd like to be able to save a Tkinter Canvas in a format other than
> postscript (preferably gif). Is there a tool out there for
> accomplishing that? Any help will be much appreciated.

pnmtools - for converting.

-- 
Regards,

Diez B. Roggisch


From zsolt-googleP6463 at mailblocks.com  Fri Feb 18 17:49:00 2005
From: zsolt-googleP6463 at mailblocks.com (pythonUser_07)
Date: 18 Feb 2005 14:49:00 -0800
Subject: xmlrpc.server.work() does not seem to handle multiple requests
In-Reply-To: <018be98bd7f75da932445488d3263748@localhost.talkaboutprogramming.com>
References: <018be98bd7f75da932445488d3263748@localhost.talkaboutprogramming.com>
Message-ID: <1108766940.300081.162900@l41g2000cwc.googlegroups.com>

Unfortunately no because this is a single threaded http server.  It's
great for testing stuff out, but  it doesn't scale unless you make it
scale.  I am assuming you could use the Zope application server to
scale your code.



From tismer at stackless.com  Mon Feb 14 19:49:17 2005
From: tismer at stackless.com (Christian Tismer)
Date: Tue, 15 Feb 2005 01:49:17 +0100
Subject: Ann: PyPy Sprint before PYCON 2005 in Washington
Message-ID: <4211470D.9040301@stackless.com>

PyPy Sprint before PYCON 2005 in Washington
-------------------------------------------

In the four days from 19th March till 22th March (inclusive)
the PyPy team will host a sprint on their new Python-in-Python
implementation.   The PyPy project was granted funding by the
European Union as part of its Sixth Framework Program,
and is now on track to produce a stackless Python-in-Python
Just-in-Time Compiler by December 2006.  Our Python
implementation, released under the MIT/BSD license, already
provides new levels of flexibility and extensibility at the
core interpreter and object implementation level.

Armin Rigo and Holger Krekel will also give talks about PyPy
and the separate  py.test tool (used to perform various kinds
of testing in PyPy) during the conference.

Naturally, we are eager to see how the other re-implementation
of Python, namely IronPython, is doing and to explore
collaboration possibilities.  Of course, that will depend on
the degree of openness that Microsoft wants to employ.

The Pycon2005 sprint is going to focus on reaching
compatibility with CPython (currently we target version 2.3.4)
for our PyPy version running on top of CPython. One goal of
the sprint is to pass 60% or more of the unmodified regression
tests of mainline CPython.  It will thus be a great way to get
to know CPython and PyPy better at the same time!  Other
possible work areas include:

- translation to C to get a first working lower-level representation
   of the interpreter "specified in Python"

- integrating and implementing a full parser/compiler chain
   written in Python maybe already targetting the new
   AST-branch of mainline CPython

- fixing various remaining issues that will come up while
   trying to reach the compatibility goal

- integrate or code pure python implementations of some Python modules
   currently written in C.

- whatever issues you come up with! (please tell us
   before hand so we can better plan introductions etc.pp.)

Besides core developers, Bea D?ring will be present to help
improving and document our sprint and agile development
process.

We are going to give tutorials about PyPy's basic concepts and
provide help to newcomers usually by pairing them with
experienced pypythonistas. However, we kindly ask newcomers to
be present on the first day's morning (19th of March) of the
sprint to be able to get everyone a smooth start into the
sprint. So far most newcomers had few problems in getting a
good start into our codebase.  However, it is good to have the
following preparational points in mind:

- some experience with programming in the Python language and
   interest to dive deeper

- subscription to  pypy-dev and  pypy-sprint at

     http://codespeak.net/pypy/index.cgi?lists

- have a subversion-client, Pygame and graphviz installed on
   the machine you bring to the sprint.

- have a look at our current  documentation, especially the
   architecture and  getting-started documents under

     http://codespeak.net/pypy/index.cgi?doc

The pypy-dev and pypy-sprint lists are also the contact points
for raising questions and suggesting and discussing sprint
topics beforehand. We are on #pypy on irc.freenode.net most
of the time. Please don't hesitate to contact us or introduce
yourself and your interests!


Logistics
---------

Organizational details will be posted to pypy-sprint and are
or will be available in the Pycon2005-Sprint wiki here:

     http://www.python.org/moin/PyConDC2005/Sprints

Registration
------------

send mail to pypy-sprint at codespeak.net, stating the days
you can be present and any specific interests if applicable.

Registered Participants
-----------------------

all days:

      Jacob Hall?n
      Armin Rigo
      Holger Krekel
      Samuele Pedroni
      Anders Chrigstr?m
      Bea D?ring
      Christian Tismer
      Richard Emslie

-- 
Christian Tismer             :^)   <mailto:tismer at stackless.com>
tismerysoft GmbH             :     Have a break! Take a ride on Python's
Johannes-Niemeyer-Weg 9A     :    *Starship* http://starship.python.net/
14109 Berlin                 :     PGP key -> http://wwwkeys.pgp.net/
work +49 30 802 86 56  mobile +49 173 24 18 776  fax +49 30 80 90 57 05
PGP 0x57F3BF04       9064 F4E1 D754 C2FF 1619  305B C09C 5A3B 57F3 BF04
      whom do you want to sponsor today?   http://www.stackless.com/






From fredrik at pythonware.com  Tue Feb  8 06:43:00 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 8 Feb 2005 12:43:00 +0100
Subject: Choosing the right parser for parsing C headers
References: <1107861023.254610.14310@g14g2000cwa.googlegroups.com>
	<6513gut0.fsf@python.net>
Message-ID: <cua8hh$vpc$1@sea.gmane.org>

Thomas Heller wrote:

> IMO, for parsing 'real-world' C header files, nothing can beat gccxml.

no free tool, at least.  if a budget is involved, I'd recommend checking
out the Edison Design Group stuff.

</F> 





From newsgroups at jhrothjr.com  Fri Feb  4 08:08:46 2005
From: newsgroups at jhrothjr.com (John Roth)
Date: Fri, 4 Feb 2005 07:08:46 -0600
Subject: Extreme Python
References: <1107468408.186079.275670@c13g2000cwb.googlegroups.com>
Message-ID: <1106t07i89qbh9a@news.supernews.com>

Sigh. Another mailing list to
subscribe to. Why do we
need this? Especially why do
we need it at Google?

I'd rather not Balkanize things and
keep the XP and Python issues away
from the two lists involved. If there are
Python specific issues, they're
quite welcome on either this list/newsgroup
or on the regular extremeprogramming
list.

John Roth
PyFIT maintainer.
Extremeprogramming mailing list moderator (1 of 7)


<troyf at pobox.com> wrote in message 
news:1107468408.186079.275670 at c13g2000cwb.googlegroups.com...
> Hello all,
>
> I've created a web/email group for topics related to both Extreme
> Programming (or other Agile methodologies) and Python. If you're
> interested, please visit
> http://groups-beta.google.com/group/extreme-python/ and subscribe. Or
> just post directly to extreme-python at googlegroups.com. Hope to see you
> there!
>
> Troy Frever
> Extreme Programmer and Coach
> Aviarc Corporation
> 



From deetsNOSPAM at web.de  Mon Feb 28 09:51:06 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 28 Feb 2005 15:51:06 +0100
Subject: Trees
References: <mailman.3035.1109311254.22381.python-list@python.org>
	<388mj5F5k1pveU1@individual.net>
	<mailman.3082.1109394363.22381.python-list@python.org>
Message-ID: <38gpanF5njk10U1@individual.net>

> Writing a *simple* node class is easy, but a full-featured one that
> supports things like comparison and easy iteration is a bit more work. So
> various people write partial implementations with only the features they
> need, and they all end up being incompatible. So beyond being able to use
> it, the other thing is that having an implementation in the standard
> library acts as a de facto interface standard, making it easier to write
> common code to operate on tree structures.

Hm. I disagree on that. Some things make only sense for binary trees, others
need explicit uplinking to the parent node and so on. Some want accessor
methods, others have certain operator overloadings used for a specific
functionality. So  in the end, it either becomes a monstrosity or is again
not usable. But that's only my HO.

> All it would take to make it happen is a PEP, an implementation and a
> champion with some persuasive ability :)

Go wild :)
-- 
Regards,

Diez B. Roggisch


From ptmcg at austin.rr.com  Thu Feb 24 16:43:12 2005
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 24 Feb 2005 13:43:12 -0800
Subject: [perl-python] exercise: partition a list by equivalence
In-Reply-To: <1109177237.722882.5880@g14g2000cwa.googlegroups.com>
References: <1108683980.894412.14060@z14g2000cwz.googlegroups.com>
	<87ekfclprv.fsf@sinken.local.csis.hku.hk>
	<87brag6m5b.fsf@sinken.local.csis.hku.hk>
	<1109177237.722882.5880@g14g2000cwa.googlegroups.com>
Message-ID: <1109281392.068212.11420@f14g2000cwb.googlegroups.com>

A slightly better version, only walks the set of cumulative list of
sets once per pairing.

-- Paul

.    import sets
.
.    input = [[1, 2], [3, 4], [2, 3], [4, 5]]
.    input = [[1, 2], [3, 4], [4, 5]]
.    input = [[1, 2],[2,1], [3, 4], [4, 5],[2,2],[2,3],[6,6]]
.
.def merge(pairings):
.    ret = []
.    for a,b in pairings:
.        aset = None
.        bset = None
.        for s in ret:
.            if not aset and a in s:
.                aset = s
.            if not bset and b in s:
.                bset = s
.            if aset and bset:
.                break
.        else:
.            if aset:
.                aset.add(b)
.            elif bset:
.                bset.add(a)
.            else:
.                ret.append(sets.Set([a,b]))
.            continue
.        if aset is not bset:
.            ret.remove(aset)
.            ret.remove(bset)
.            ret.append(aset.union(bset))
.
.    return [list(s) for s in ret]
.                
.print merge(input)



From tdelaney at avaya.com  Sun Feb  6 18:39:55 2005
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Mon, 7 Feb 2005 10:39:55 +1100
Subject: Why does super() require the class as the first argument?
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE721238@au3010avexu1.global.avaya.com>

Nick Coghlan wrote:

> It *is* possible to eliminate the explicit class argument, but it
> takes a bit (*cough*) of work:
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/286195

Nick - you stole my thunder ;)

Note that my recipe uses a sys._getframe() hack, so it will never be in
Python as it is. It's also considerably slower than just using super.
But it *does* eliminate the need for specifying the current class name,
and (if you wish) the current method name.

Guido has said that eventually he wants a simpler super() call - but he
doesn't really like my proposed syntax of having it hang off self.
Personally, I like it though and if there was enough community support
I'd write it up as a PEP using the recipe as a sample implementation
which demonstrates the required semantics. However, it hasn't gained
much community support so far ;)

Tim Delaney


From nospam at me.invalid  Sat Feb 26 21:06:54 2005
From: nospam at me.invalid (anthonyberet)
Date: Sun, 27 Feb 2005 02:06:54 +0000
Subject: string methods (warning, newbie)
Message-ID: <38co9sF5lgss3U1@individual.net>

Is there a string mething to return only the alpha characters of a string?
eg 'The Beatles - help - 03 - Ticket to ride', would be 
'TheBeatlesTickettoride'

If not then how best to approach this?
I have some complicated plan to cut the string into individual 
characters and then concatenate a new string with the ones that return 
true with the .isalpha string method.

Is there an easier way?


From theller at python.net  Thu Feb  3 03:43:46 2005
From: theller at python.net (Thomas Heller)
Date: Thu, 03 Feb 2005 09:43:46 +0100
Subject: pyFMOD problem
References: <39d7536d.0502021515.6c9c5c07@posting.google.com>
Message-ID: <wttqav99.fsf@python.net>

wangtianthu at gmail.com (Tian) writes:

> I am trying to use pyfmod in python to manipulate sound.
> i have installed pyfmod, ctype, numarray (if they are necessary), i
> also copied fmod.dll to python/DLLs as well as windows/system32, but

First, you should copy fmod.dll to a directory somewhere where
LoadLibrary can find it.  That includes directories on PATH, plus the
directory where the executable is.  python/DLLs does probably not work.

> when i tried
>
>    import pyFMOD
>
> I got:
>
> Traceback (most recent call last):
>   File "<pyshell#0>", line 1, in -toplevel-
>     import pyFMOD
>   File "C:\Python24\Lib\site-packages\pyFMOD.py", line 177, in
> -toplevel-
>     _FSOUND_Sample_Load = getattr(fmod, "_FSOUND_Sample_Load at 16")
>   File "C:\Python24\Lib\site-packages\ctypes\__init__.py", line 323,
> in __getattr__
>     func = self._StdcallFuncPtr(name, self)
> AttributeError: function '_FSOUND_Sample_Load at 16' not found
> -------------------------------------
> How can I deal with this?
> Thanks!

The fmod.dll that I just downloaded has a function named
'_FSOUND_Sample_Load at 20', which indicates an api change (the number of
the '@' sign indicates how many bytes are needed as parameters).

Probably pyFMOD needs an older version of fmod.dll, or pyFMOD should be
updated?

Thomas


From dmarcusanu at yahoo.com  Tue Feb  1 22:22:54 2005
From: dmarcusanu at yahoo.com (Dana Marcusanu)
Date: Tue, 1 Feb 2005 19:22:54 -0800 (PST)
Subject: getting data from a port in use
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E801DAFDE4@its-xchg4.massey.ac.nz>
Message-ID: <20050202032254.72375.qmail@web52902.mail.yahoo.com>


--- Tony Meyer <t-meyer at ihug.co.nz> wrote:

> > I am trying to use Python to get the data received at a 
> > specific port (in use) on my computer. I already tried below
> > code which seems to hang at the statement accepting
> > connections. 
> 
> Seems to hang, or does hang?  Using print statements will tell you
> whether
> that's where it's getting stuck or not.
> 
> > I don't know what else I can try. Any
> > suggestions will be welcome.
> > 
> > import socket, select, os 
> > 
> > PORT = 2005
> > s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> > s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) 
> > s.bind((socket.gethostname(), PORT))
> > s.listen(1)
> > work_socket, addr = s.accept() 
> > data = s.recv(1024)
> [...]
> 
> This should be 'data = work_socket.recv(1024)'.
> 
> This script works for me with that change.  (i.e. I can run it with port
> 2005 already in use, connect to the port, and it will finish without
> error).
> 
> =Tony.Meyer
> 
> 


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
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From fakeadmin at gmail.com  Fri Feb 11 01:19:15 2005
From: fakeadmin at gmail.com (rhat)
Date: 10 Feb 2005 22:19:15 -0800
Subject: Unit Testing in Python
In-Reply-To: <mailman.2362.1108092766.22381.python-list@python.org>
References: <1108087841.271630.228970@o13g2000cwo.googlegroups.com>
	<roy-D161EC.21340610022005@reader2.panix.com>
	<mailman.2361.1108089695.22381.python-list@python.org>
	<1108092157.371659.282070@z14g2000cwz.googlegroups.com>
	<mailman.2362.1108092766.22381.python-list@python.org>
Message-ID: <1108102755.527122.300310@l41g2000cwc.googlegroups.com>


Tom Willis wrote:
> It could be a bug in gmail. I wasn't actually accusing you, just
> thought it was funny enough to point out. Of course you could be more
> sarcastic than me who knows. :)
>
> I'm not worried though. I believe the best strategy against Identity
> theft is bad credit.
>
> So question , do you see the big red block on your own posts, or have
> I been sitting in front of the puter too long?
>
>
> On Thu, 10 Feb 2005 19:25:13 -0800 (PST), rhat <fakeadmin at gmail.com>
wrote:
> > Yeah, you know I only ask questions about Test-driven development
> > basics in hopes of obtaining your personal information, so that I
can
> > sell it on the Molodovian blackmarket. I'm not a "Phisher", I'm a
> > comp-sci major who's too lazy to dig around for his own answers. ;)
> >
> > Thanks for your help Roy, I wasn't sure what the difference between
> > unittest and pyunit were.
> > --|2 \| /-\ |\| |</-\|_||_/-\|<15   (the uber-l33t version of my
> > supersecret "phishing" alias which just so happens to be my actual
> > name)
> >
> > PS: Yeah, I too am plerplexed as to why gmail allowed me to
register
> > "fakeadmin" as a login. Sure makes a good conversation started
though.
> > =P
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
> --
> Thomas G. Willis
> http://paperbackmusic.net

I'm glad people have a still have a sense of humor, and yes gmail does
flag mail that I send myself (as in fakeadmin at gmail.com ->
fakeadmin at gmail.com) as being possibly "not from who they claim" I
don't have any other gmail accounts, so I just thought it happened with
all accounts.



From ajikoe at gmail.com  Tue Feb  1 07:33:18 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 1 Feb 2005 04:33:18 -0800
Subject: type of simple object
In-Reply-To: <tyfy8e8lcef.fsf@pcepsft001.cern.ch>
References: <1107255752.258025.50870@z14g2000cwz.googlegroups.com>
	<1107257264.146280.89560@c13g2000cwb.googlegroups.com>
	<1107258136.815344.145380@c13g2000cwb.googlegroups.com>
	<tyfy8e8lcef.fsf@pcepsft001.cern.ch>
Message-ID: <1107261198.943087.80960@z14g2000cwz.googlegroups.com>

Thank you guys.

My function should multiply every element  of a list, for example
"something"
and "something" can be an integer or another list.
If it deals with integer than it is ok, but
If it deals with list than it become false for example list*2 =
listlist, and what I really want is to mutlitply its member.
That's why I need to know the type of my data in "something".

By the way I am new in python, I heard that it has a MatLab
capabilities, How good is that? Since It would be very nice when we can
do what MatLab do in python.....


Sincerely Yours,
pujo



From fredrik at pythonware.com  Wed Feb 16 12:45:50 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 16 Feb 2005 18:45:50 +0100
Subject: super not working in __del__  ?
References: <cuu0pu$t44$1@sea.gmane.org> <cuuqrr$f1o$1@sea.gmane.org>
	<cuvslt$ii5$1@sea.gmane.org>
Message-ID: <cv00mu$20a$1@sea.gmane.org>

Christopher J. Bottaro wrote:

> 2 Questions...
> 1)  Why does this never happen in C++?  Or does it, its just never happened
> to me?

C++ uses an entirely different allocation model.  if you think in C++ when
you write Python, you will write bad Python.

> 2)  I can understand random destruction of instantiated objects, but I find
> it weird that class definitions (sorry, bad terminology) are destroyed at
> the same time.  So __del__ can't safely instantiate any classes if its
> being called as a result of interpreter shutdown?  Boo...

please read the essay.  and fixing your terminology may help you understand
how things work (hint: class creates a class object and binds it to a name, like
any other assignment. class objects are no different from other objects)

(btw, if you don't know exactly why you need to use __del__, chances are that
you don't need to use it.  __del__ is a finalizer, not a destructor.).

</F> 





From fouff at fouff.com  Wed Feb 16 02:14:51 2005
From: fouff at fouff.com (Fouff)
Date: Wed, 16 Feb 2005 08:14:51 +0100
Subject: how to import a .py in a parent directory ?
In-Reply-To: <4212878f$0$9483$636a15ce@news.free.fr>
References: <4212878f$0$9483$636a15ce@news.free.fr>
Message-ID: <4212f304$0$9507$636a15ce@news.free.fr>

raver2046 a ?crit :
> hello,
> 
> I know to import a .py in a subdirectory is   :   .  (dot)
> but what is the statment for parent directory ?
> 
> thank you.
> olivier noblanc
> http://www.logiciel-erp.fr
> 
> 
sys.path.append("..")
import you_python_file_you_want_to_import.py


From mahs at telcopartners.com  Wed Feb  9 13:10:45 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 09 Feb 2005 10:10:45 -0800
Subject: A ListComp that maintains its own state
In-Reply-To: <s9zr7jqauup.fsf@salmakis.intevation.de>
References: <1107805151.265680.165380@o13g2000cwo.googlegroups.com>	<87mzuf9gu8.fsf@localhost.localdomain.i-did-not-set--mail-host-address--so-tickle-me>	<s9zvf93ovp8.fsf@salmakis.intevation.de>	<pan.2005.02.08.12.47.00.135408@jerf.org>	<s9z8y5yq1fp.fsf@salmakis.intevation.de>	<mailman.2215.1107900386.22381.python-list@python.org>
	<s9zr7jqauup.fsf@salmakis.intevation.de>
Message-ID: <cudjju$9t4$1@sea.gmane.org>

Bernhard Herzog wrote:
> Michael Spencer <mahs at telcopartners.com> writes:
> 
> 
>>So, here's factorial in one line:
>># state refers to list of state history - it is initialized to [1]
>># on any iteration, the previous state is in state[-1]
>># the expression also uses the trick of list.append() => None
>># to both update the state, and return the last state
>>
>> >>> [state.append(state[-1] * symbol) or state[-1]
>>...         for symbol, state in it.izip(range(1,10),it.repeat([1]))
>>...             ]
>>[1, 2, 6, 24, 120, 720, 5040, 40320, 362880]
>> >>>
> 
> 
> There's no need for repeat:
> 
> 
>>>>[state.append(state[-1] * symbol) or state[-1] 
> 
>         for state in [[1]]
>         for symbol in range(1, 10)]
> [1, 2, 6, 24, 120, 720, 5040, 40320, 362880]
> 
> 
> While we're at it, a while back I posted a list comprehension that
> implements a 'recursive' flatten:
> 
> http://groups.google.de/groups?selm=s9zy8eyzcnl.fsf%40salmakis.intevation.de
> 
> 
>    Bernhard
> 
Much better - that also cleanly extends to any number of initializers.  I also 
like the approach you take in flatten (and as suggested by Carl Banks) of 
putting the update mechanism in the if clause

So that gives:

def factorial(n):
     return [state[-1]
             for state in [[1]]
                 for count in xrange(1,n+1)
                     if state.append(state[-1] * count) or True
                 ]

Probably of limited practical value, but fun to explore the language.


Thanks
Michael




From jonas at freesources.org  Sun Feb 20 11:30:18 2005
From: jonas at freesources.org (Jonas Meurer)
Date: Sun, 20 Feb 2005 17:30:18 +0100
Subject: questions concerning cgi.FieldStorage(keep_blank_values=1)
Message-ID: <20050220163017.GA4727@resivo.mejo.net>

hello,

i'm quite new to python. currently i try to write a web application with
python cgi scripts.

in this application, i need keys to be delivered with the url, some with
and some without value (for example 'script.py?key1&key2=foo'.

i've searched the internet, and already figured out that i need to give
non-empty keep_blank_values as argument to cgi.FieldStorage, to make it
not cut all the empty keywords.

anyway, this still doesn't work really good:

---snip---
form = cgi.FieldStorage(keep_blank_values=1)

print 'list keys with form.keys():'
keys = form.keys()
keys.sort()
for key in keys:
	print key
---snip---

if i request the script with script.py?key1&key2=foo, it will output:
list keys with form.keys():
key2

any suggestions about how to make form.keys() contain the blank keys as
well?

bye
 jonas


From olivier at olivier.nospam.pk.wau.nl  Thu Feb 24 09:06:46 2005
From: olivier at olivier.nospam.pk.wau.nl (Olivier Sessink)
Date: Thu, 24 Feb 2005 15:06:46 +0100
Subject: what are PyObject *globals and PyObject *locals ?
Message-ID: <pan.2005.02.24.14.06.46.312471@olivier.nospam.pk.wau.nl>

Hi all,

I want to make a value available to the global namespace of an embedded
python interpreter. Several functions of the Python/C API feature a
PyObject *globals and a PyObject *locals, so my guess is that these can be
used for this purpose. Unfortunately, the Python/C API does not describe
how this works.

If I want for example, to create a variable MyVar that can be read by the
python code in some filename, to be run with PyRun_AnyFile();, how can I
do this?

Or do I misunderstand the API, and can Py_InitModule() register both
functions *and* variables? (and how to register the variable then?)

regards,
	Olivier

(I know extending is the preferred solution, unfortunately I was not aware
of this some years ago)

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From jzgoda at gazeta.usun.pl  Sun Feb 27 14:47:23 2005
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Sun, 27 Feb 2005 20:47:23 +0100
Subject: Lib for RSS/Atom parsing
In-Reply-To: <7eb83f4a.0502271010.1cb40fa1@posting.google.com>
References: <7eb83f4a.0502271010.1cb40fa1@posting.google.com>
Message-ID: <cvt8ch$2gn$1@nemesis.news.tpi.pl>

Florian Lindner napisa?(a):

> what is a good python library for parsing of RSS and/or Atom feeds. It
> should be able to handle most of the common protocols.

Mark Pilgrim's feedparser.

-- 
Jarek Zgoda
http://jpa.berlios.de/ | http://www.zgodowie.org/


From luke at tatooine.planet  Mon Feb  7 13:30:09 2005
From: luke at tatooine.planet (Luke Skywalker)
Date: Mon, 07 Feb 2005 19:30:09 +0100
Subject: Big development in the GUI realm
References: <1107795145.049239.73450@l41g2000cwc.googlegroups.com>
	<mailman.2092.1107797420.22381.python-list@python.org>
Message-ID: <5ocf01hmspufk3iusvm35p6hj4mes5heke@4ax.com>

On Mon, 7 Feb 2005 18:30:18 +0100, Michael Goettsche
<mail at tuxipuxi.org> wrote:
>Not 100% right. Only drivers for commercial databases will not be included, 
>mysql and co. are available.

What I find weird, is that I always understood the GPL meaning that
you must give back any contribution you made to the source code of the
GPLed code, but not if you're just using either a binary distribution
(eg. a DLL) or if you copy/pasted the code as is, with no changes on
your own.

If this is true, then the fact that Qt is now GPLed for Windows means
that I should be able to use this widget set even in commercial apps
since I'm not making any change to Qt, just using it.

Am I totally off-target?

Cheers
Luke.


From Scott.Daniels at Acm.Org  Fri Feb 25 10:02:13 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Fri, 25 Feb 2005 07:02:13 -0800
Subject: strange SyntaxError
In-Reply-To: <mailman.3044.1109338441.22381.python-list@python.org>
References: <mailman.3044.1109338441.22381.python-list@python.org>
Message-ID: <421f39c7$1@nntp0.pdx.net>

Attila Szabo wrote:
> Hi,
> def main():
>         lambda x: 'ABC%s' % str(x)
>         for k in range(2): exec('print %s' % k)
OK, to no real effect, in main you define an unnamed function that
you can never reference.  Pretty silly, but I'll bite.

Next you run run a loop with exec looking like you think it is a
function.  In the loop, your "exec" statement does not control
(specify) its access to global and local variables.  This could be
a problem if your function were different.  The function above does
not do any up-referencing, but:

     def main():
         def inner():
             return k + 1

         for k in range(4):
             exec 'k = 3 * k'
             print k, inner()

What should this do?

If you think you know, how about replacing the exec line with:

             exec raw_input('Tricky: ')

You can fix this by controlling what variables the exec can write:

             exec 'k = 3 * k' in globals(), locals()

This is why locals() does not do write-back.

The rule below (which was high on the list when searching for exec),
tells the exact rules, the above stuff is just why.

     http://www.python.org/doc/2.4/ref/dynamic-features.html

--Scott David Daniels
Scott.Daniels at Acm.Org


From tzot at sil-tec.gr  Wed Feb 16 03:29:15 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Wed, 16 Feb 2005 10:29:15 +0200
Subject: "perl -p -i -e" trick in Python?
References: <cuuol5$2ri$1@news1.kornet.net>
	<3e8ca5c8050215223851664ca5@mail.gmail.com>
	<mailman.2676.1108536285.22381.python-list@python.org>
Message-ID: <s11611l4f7pld6k27mdic3hpnht7oeckog@4ax.com>

On Wed, 16 Feb 2005 01:44:40 -0500, rumours say that Jack Diederich
<jack at performancedrivers.com> might have written:

>/tmp/> python
>Python 2.3.4 (#2, Jan  5 2005, 08:24:51) 
>Type "help", "copyright", "credits" or "license" for more information.
>>>> ^D

"Instant porting of any program to python".  Smooth.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From softpro at gmx.net  Sat Feb  5 21:40:11 2005
From: softpro at gmx.net (Johannes Ahl mann)
Date: Sun, 6 Feb 2005 03:40:11 +0100
Subject: bad generator performance
Message-ID: <cu402b$83r$00$1@news.t-online.com>

hi,

i am in the process of profiling an application and noticed how much
time my depth first generator for walking a tree data structure took.

i wrote the same thing as a recursive function producing an array, and
this non-generator version is nearly 10 times faster!

any ideas why this is, what i did wrong...
for some reason the generator version appears as being called much more
often than the recursive one. no idea why that is, but the data is
definitely identical!

here the output from the python profiler and the respective code:

### snip ###

ncalls  tottime  percall  cumtime  percall filename:lineno(function)
94209/8191    0.560    0.000    0.590    0.000  :71(depthFirstIterator2)
4095/1    0.060    0.000    0.080    0.080  :62(depthFirstIterator1)

### snip ###
	
def depthFirstIterator1(self, depth = 0):
    ret = [[self, True, depth]]

    if self.isFolder():
      for c in self.children:
        ret = ret + c.depthFirstIterator(depth = depth + 1)

    return ret + [[self, False, depth]]

def depthFirstIterator2(self, depth = 0):
    yield [self, True, depth]

    if self.isFolder():
      for c in self.children:
        for y in c.depthFirstIterator(depth = depth + 1):
          yield y

    yield [self, False, depth]

### snip ###

i'd appreciate any comments or explanations why the generator might be
so much slower, as i had just decided to use generators more frequently
and in the respective PEP they are praised as generally fast.

thx,

Johannes


From fredrik at pythonware.com  Mon Feb 14 11:31:04 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 14 Feb 2005 17:31:04 +0100
Subject: - E02 - Support for MinGW Open Source Compiler
References: <cuo71l$gig$1@usenet.otenet.gr><cupstp$an7$2@ctb-nnrp2.saix.net><cupupa$kfs$2@usenet.otenet.gr>
	<1108398011.213872.321390@o13g2000cwo.googlegroups.com>
Message-ID: <cuqjj7$t68$1@sea.gmane.org>

"Pat" wrote:


> The bottom line is that compiling C extension modules on the
> Windows platform for Python 2.4 is, today, a royal pain in the
> ass.

really?

    > python setup.py install

works for me.

</F> 





From reinhold-birkenfeld-nospam at wolke7.net  Mon Feb  7 14:49:05 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Mon, 07 Feb 2005 20:49:05 +0100
Subject: string issue
In-Reply-To: <1grmr97.9o27yo1xzwzd7N%aleaxit@yahoo.com>
References: <cu0i3o$jc6$1@solaris.cc.vt.edu>
	<36QMd.103084$Jk5.36127@lakeread01>
	<cu0j92$kf7$2@solaris.cc.vt.edu>
	<mailman.1913.1107547130.22381.python-list@python.org>
	<1grl717.1o4ofg7arp8c2N%aleaxit@yahoo.com>
	<36plr5F551pg8U1@individual.net>
	<1grmr97.9o27yo1xzwzd7N%aleaxit@yahoo.com>
Message-ID: <36pv1dF55bt9jU1@individual.net>

Alex Martelli wrote:

> So, *WHAT ON EARTH* could possibly
> make this weird 'x[:]' form preferable to 'x*1'?!  It's MUCH more
> obvious that the second one returns an independent, separate object
> initially equal to x

.>> x = 2
.>> y = x*1
.>> x is y
True
.>>

just-kidding-ly yours,

Reinhold


From bvande at po-box.mcgill.ca  Wed Feb 16 16:44:04 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Wed, 16 Feb 2005 16:44:04 -0500
Subject: problem with tutor mailing
In-Reply-To: <614c778e.0502161311.619e98bf@posting.google.com>
References: <614c778e.0502161311.619e98bf@posting.google.com>
Message-ID: <4213BEA4.4070304@po-box.mcgill.ca>

administrata said unto the world upon 2005-02-16 16:11:
> i'm using tutor maling...
> 
> i e-mail some questions to tutor and
> 
> get answers.
> 
> but, i frequently get mails which aren't related with my question.
> 
> how should i stop it?

You do know it's a mailing list that you've subscribed too, right?

As in, people post and you get their posts, not just replies to your 
own messages.

You could read it via gmane and read only the replies to your threads 
-- though I am not sure if you can post to Tutor without being a 
subscriber.

I do get the downside of subscribing -- at the very least, you've got 
to put up with long questions posted by me ;-)

But, I'd encourage you to remain subscribed. I am certainly no expert 
(as today's Tutor traffic can attest). But, much of what I know I 
learned by reading other people's questions and the answers to them.

Best,

Brian vdB



From kent37 at tds.net  Sun Feb 13 14:29:35 2005
From: kent37 at tds.net (Kent Johnson)
Date: Sun, 13 Feb 2005 14:29:35 -0500
Subject: Second posting - Howto connect to MsSQL
In-Reply-To: <iyMPd.4612$ZZ.1645@newssvr23.news.prodigy.net>
References: <iyMPd.4612$ZZ.1645@newssvr23.news.prodigy.net>
Message-ID: <420fa7b1$1_2@newspeer2.tds.net>

John Fabiani wrote:
> Hi,
> Since this is (sort of) my second request it must not be an easy solution. 
> Are there others using Python to connect MsSQL?  At the moment I'd accept
> even a windows solution - although, I'm looking for a Linux solution.

On Windows, you can use http://sourceforge.net/projects/adodbapi

Kent


From circusrat at gmail.com  Fri Feb 18 11:14:49 2005
From: circusrat at gmail.com (jr)
Date: 18 Feb 2005 08:14:49 -0800
Subject: msnp, friends list
In-Reply-To: <mailman.2784.1108683730.22381.python-list@python.org>
References: <1108665091.090003.59630@c13g2000cwb.googlegroups.com>
	<mailman.2771.1108671855.22381.python-list@python.org>
	<1108679723.100970.322170@c13g2000cwb.googlegroups.com>
	<mailman.2784.1108683730.22381.python-list@python.org>
Message-ID: <1108743289.337168.125640@g14g2000cwa.googlegroups.com>

Mark,
Thank you so much for that information. Been struggling with this issue
for quite some time now. A simle line comment on line 647 of session.py
solves all problems :)
this line sets your status to online and does not get time (usually) to
get friends list correctly.



From dimitri.pater at gmail.com  Fri Feb  4 06:30:17 2005
From: dimitri.pater at gmail.com (dimitri pater)
Date: Fri, 4 Feb 2005 12:30:17 +0100
Subject: walktree browser filenames problem
Message-ID: <e75321bd050204033029da0893@mail.gmail.com>

Hello,

I use the following script to list the files and download files from
my website (99% of the code is from
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/200131).
The problem is that the filenames are cut off in the status bar of the
browser because of the white space (eg 'hello.pdf' works, but 'hello
there.pdf' is displayed as hello).
The filenames are displayed correctly in the main page of the browser.
I tried several things, maybe somebody knows how to do it?

script: (sorry for the long list)

#! /usr/bin/python

import os, sys
import cgi
print "Content-type: text/html"
print
print "<pre>"

try:
    import cgitb
    cgitb.enable()
except:
    sys.stderr = sys.stdout

print "</pre>"

def walktree(top = "../upload", depthfirst = True):
    import os, stat, types
    names = os.listdir(top)
    if not depthfirst:
        yield top, names
    for name in names:
        try:
            st = os.lstat(os.path.join(top, name))
        except os.error:
            continue
        if stat.S_ISDIR(st.st_mode):
            for (newtop, children) in walktree (os.path.join(top,
name), depthfirst):
                yield newtop, children
    if depthfirst:
        yield top, names

def makeHTMLtable(top, depthfirst=False):
    from xml.sax.saxutils import escape # To quote out things like &amp;
    ret = ['<table class="fileList">\n']
    for top, names in walktree(top):
        ret.append('   <tr><td class="directory">%s</td></tr>\n'%escape(top))
        for name in names:
            ret.append('   <tr><td class="file"><a
href=http://e-bench.serpia.com/upload/%s>%s</a></td></tr>\n' %
(escape(name),escape(name)))
    ret.append('</table>')
    return ''.join(ret) # Much faster than += method

def makeHTMLpage(top, depthfirst=False):
    return '\n'.join(['<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"',
                      '"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">',
                      '<html>'
                      '<head>',
                      '   <title>Search results</title>',
                      '   <style type="text/css">',
                      '      table.fileList { text-align: left; }',
                      '      td.directory { font-weight: bold; }',
                      '      td.file { padding-left: 4em; }',
                      '   </style>',
                      '</head>',
                      '<body>',
                      '<h1>Documenten e-bench</h1>',
                      makeHTMLtable(top, depthfirst),
                      '<BR><BR><HR><B><A
HREF="http://e-bench.serpia.com">Home</A></B>',
                      '<h5>To do: escape chars verwijderen</h5>',
                      '<h5>...</h5>',
                      '<h5>Aparte HTML template maken als in upload.py</h5>',
                      '</body>',
                      '</html>'])
                   
if __name__ == '__main__':
    if len(sys.argv) == 2:
        top = sys.argv[1]
    else: top = '.'
    print makeHTMLpage('../upload')

-- 
Please visit dimitri's website: www.serpia.com


From unlearned at gmail.com  Tue Feb  1 18:18:19 2005
From: unlearned at gmail.com (Daniel Fackrell)
Date: Tue, 1 Feb 2005 16:18:19 -0700
Subject: [perl-python] string pattern matching
References: <1107290707.549792.199860@c13g2000cwb.googlegroups.com>
Message-ID: <ctp2hi$c3q$1@sea.gmane.org>

Perhaps a message to the effect of "These messages are specifically disowned
by the groups to which they are posted, have historically been riddled with
blatant errors, and are assumed to continue in the same quality." should be
posted as a follow-up to each of these messages by XL in order to avoid
having to spend the time to find the inaccuracies in each one individually.

Considering the response so far, a list of frequent posters and
not-so-frequent posters who will vouch for the accuracy of the disclaimer
might even be added.

Daniel Fackrell





From jdhunter at ace.bsd.uchicago.edu  Thu Feb 10 15:49:36 2005
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Thu, 10 Feb 2005 14:49:36 -0600
Subject: Variable size plot symbols, variable hue plot colors in Python
 (MatPlotLib) ?
In-Reply-To: <1108050998.189066.201440@c13g2000cwb.googlegroups.com> ("Dr.
	Colombes"'s message of "10 Feb 2005 07:56:38 -0800")
References: <1108050998.189066.201440@c13g2000cwb.googlegroups.com>
Message-ID: <m3zmyc3ztr.fsf@peds-pc311.bsd.uchicago.edu>

>>>>> "Colombes" == Colombes  <DrColombes at yahoo.com> writes:

    Colombes> Using MatPlotLib plot function, is there a way to get
    Colombes> variable size plot symbols?  For example, using symbol
    Colombes> strings like 'o' (circle), 's' (square), 'x' (cross),
    Colombes> etc., is there a way to specify other plot symbols such
    Colombes> a small circle, Medium square, LARGE cross, etc.?

  plot(x, y, 'o', markersize=10) # big
  plot(x, y, 'o', markersize=20) # bigger

    Colombes> Similarly, using the MatPlotLib plot function, is there
    Colombes> a way to get variable hue (RGB-specified) plot colors?
    Colombes> For example, using symbol strings like 'b' (blue), 'g'
    Colombes> (green), 'red' (red), etc., is there a way to specify
    Colombes> other colors such as light blue, dark green, pink, etc.?

All legal html color names are supported

>>> plot(x, y, 'o', markersize=10, markerfacecolor='green', markeredgecolor='red') 

Eg

    lightblue            : #ADD8E6 	
    lightcoral           : #F08080 	
    lightcyan            : #E0FFFF 	
    lightgoldenrodyellow : #FAFAD2 	
    lightgreen           : #90EE90 	
    lightgrey            : #D3D3D3  	
    lightpink            : #FFB6C1 	
    lightsalmon          : #FFA07A 	
    lightseagreen        : #20B2AA 	
    lightskyblue         : #87CEFA 	
    lightslategray       : #778899  	
    lightsteelblue       : #B0C4DE 	
    lightyellow          : #FFFFE0 	


# or use aliases for less typing
>>> plot(x, y, 'o', ms=10, mfc='green', mec='red') 

# or rgba or hex
>>> plot(x, y, 'o', ms=10, mfc='#008000, mec=(1,0,0,1) )


    Colombes> Or perhaps is there some other Python MatPlotLib or
    Colombes> other Python module functions that allow variable size
    Colombes> plot symbols and variable hue plot colors in Python ?

The scatter command supports markers with varying sizes and colors.
screenshot with example code at
http://matplotlib.sourceforge.net/screenshots.html#scatter_demo2 .
Docs at
http://matplotlib.sourceforge.net/matplotlib.pylab.html#-scatter.

You might want to check out the tutorial and/or the user's guide.
Most of these issues are touched on there.

JDH


From KWF6 at ITS-5  Tue Feb 15 17:06:08 2005
From: KWF6 at ITS-5 (KWF6 at ITS-5)
Date: Tue Feb 15 17:06:08 2005
Subject: KWF delivery failure notification
Message-ID: <SERVERIgoFT3kMUVfNI000005c1@e1000.ru>

An embedded and charset-unspecified text was scrubbed...
Name: not available
URL: <http://mail.python.org/pipermail/python-list/attachments/20050215/9e74d93c/attachment.ksh>

From mahs at telcopartners.com  Sun Feb 13 19:32:45 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sun, 13 Feb 2005 16:32:45 -0800
Subject: builtin functions for and and or?
In-Reply-To: <WWRPd.4686$ZZ.1221@newssvr23.news.prodigy.net>
References: <y9PPd.4645$ZZ.528@newssvr23.news.prodigy.net>	<37a2i0F58gsbsU1@individual.net>	<1108335152.338013.45530@z14g2000cwz.googlegroups.com><8xRPd.4678$ZZ.3668@newssvr23.news.prodigy.net>	<mailman.2498.1108338626.22381.python-list@python.org>
	<WWRPd.4686$ZZ.1221@newssvr23.news.prodigy.net>
Message-ID: <cuordg$7nn$1@sea.gmane.org>

Roose wrote:
>>Previous discussion on this topic:
>>http://groups-beta.google.com/group/comp.lang.python/msg/a76b4c2caf6c435c
>>
>>Michael
>>
> 
> 
> OK, well then.  That's really the exact same thing, down to the names of the
> functions.  So what ever happened to that?  
> 
I don't recall: probably 
http://www.google.com/search?sourceid=mozclient&ie=utf-8&oe=utf-8&q=alltrue+site%3Amail.python.org+python-dev

would lead you to the answer


That was over a year ago!  I
 > don't see any mention of it in PEP 289?
 >
No, PEP289 was for generator expressions - the any/all discussion arose as one 
application of those/itertools

Michael



From ilias at lazaridis.com  Sun Feb 20 06:30:49 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sun, 20 Feb 2005 13:30:49 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <mailman.2837.1108832106.22381.python-list@python.org>
References: <cuo71l$gig$1@usenet.otenet.gr><42172136$0$27576$9b622d9e@news.freenet.de><cv7i57$d0v$1@usenet.otenet.gr>	<cv7k8e$4pa$03$1@news.t-online.com>
	<cv7m2m$gp$1@usenet.otenet.gr>
	<mailman.2837.1108832106.22381.python-list@python.org>
Message-ID: <cv9sd9$69n$2@usenet.otenet.gr>

Fredrik Lundh wrote:
> Ilias Lazaridis wrote:
> 
>>Should a professional developer take python serious?
> 
> yes.

Should I take answers serious?

Answer from people which do not respect coherence of writings?

"
Should a professional developer take python serious?

I mean, if the team does not manage at least the foundation of a 
multi-target automated-build-process?

[targets need not to be supported directly by the python team. They 
could be added/managed/maintained by community members]
"

.

-- 
http://lazaridis.com


From pekka.niiranen at wlanmail.com  Thu Feb 10 14:44:27 2005
From: pekka.niiranen at wlanmail.com (Pekka Niiranen)
Date: Thu, 10 Feb 2005 21:44:27 +0200
Subject: goto, cls, wait  commands
In-Reply-To: <cug9s3$l21$1@yggdrasil.glocalnet.net>
References: <1ixbe7q69lob3.1npuu3z54gx8z.dlg@40tude.net>
	<Xns95F9A4E32D0CBduncanrcpcouk@127.0.0.1>
	<420b9f4b$0$29241$626a14ce@news.free.fr>
	<cug9s3$l21$1@yggdrasil.glocalnet.net>
Message-ID: <420bb95e$0$5259$39db0f71@news.song.fi>

import os
if os.name == "nt":		
	os.system("cls")	# Works in w2k
else:
         os.system("clear")	# Works in cygwin's Bash

Ulf G?ransson wrote:
> Bruno Desthuilliers wrote:
> 
>> Duncan Booth a ?crit :
>>
>>> BOOGIEMAN wrote:
>>>
>>>> Secondly, how do I clear screen (cls) from text and other
>>>> content ?
>>>
>>>
>>> That depends on your computer, and how you are running your program.
>>> One way which *might* work is:
>>>
>>>    import os
>>>    os.system("cls")
>>
>>
>> *might* work... !-)
>>  bruno at bibi modulix $ cls
>> -bash: cls: command not found
>>
>> Bad luck ! didn't work !-)
> 
> 
> Works for me! But then again...
> 
> kairos:ug> cat cls
> #! /usr/local/bin/python
> print "\xc",
> 
> /ug 8-)


From Serge.Orlov at gmail.com  Fri Feb 18 04:25:06 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: 18 Feb 2005 01:25:06 -0800
Subject: Access to formatting controls from within __repr__ or __str__?
References: <m2braiwy23.fsf@unique.fully.qualified.domain.name.yeah.right>
Message-ID: <1108718706.649402.264600@o13g2000cwo.googlegroups.com>

Dan Sommers wrote:

> So my question is:  Is there a way to pass options "through" a format
> string to the __str__ and __repr__ functions?  For example, can I
> define  my own alternate form for use with the '#' formatting
> character, so that '%#s' generates output according to SI guidelines?

You can create your own class FmtTemplate like string.Template was done
in python 2.4: http://docs.python.org/lib/node105.html

and have it call obj.__str__("#s") when you use ${obj:#s} format. I'm
not sure why you want to pass format to repr (as far as I understand
repr is mostly for debug purposes) but you can call from template as
${obj:r} --> obj.__repr__()
${obj:#r} --> obj.__repr__("#r")

fmt = FmtTemplate("quantity1: ${q1:#s}, quantity2: ${q2:#s}")
q1=MyQuantity(...)
q2=MyQuantity(...)
print fmt.substitute(q1=q1,q2=q2)

  Serge.



From ilias at lazaridis.com  Mon Feb 14 18:07:39 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 15 Feb 2005 01:07:39 +0200
Subject: [EVALUATION] - E02 - Support for MinGW Open Source Compiler
In-Reply-To: <$V$QoHxvMRECFwFz@objmedia.demon.co.uk>
References: <cuo71l$gig$1@usenet.otenet.gr> <cup249$svu$1@gemini.csx.cam.ac.uk>
	<cupqb6$1oi$1@usenet.otenet.gr> <cups17$kbs$1@gemini.csx.cam.ac.uk>
	<cupvmh$os2$1@usenet.otenet.gr>
	<mailman.2520.1108379101.22381.python-list@python.org>
	<cuq32h$a3e$1@usenet.otenet.gr>
	<4210c5c3$0$41647$a1866201@visi.com>
	<cuqta4$4c1$2@usenet.otenet.gr>
	<$V$QoHxvMRECFwFz@objmedia.demon.co.uk>
Message-ID: <curavq$67k$1@usenet.otenet.gr>

Stephen Kellett wrote:
> In message <cuqta4$4c1$2 at usenet.otenet.gr>, Ilias Lazaridis 
> <ilias at lazaridis.com> writes
> 
>> I like to synchronize any efforts with the existing ones.
> 
> I assume the reason for doing that would be to avoid duplicating effort? 
[...] - (off-topic suggestions processing model)

Your suggestions were irrelevant to me.

Please avoid further off-topic posts.

.

-- 
http://lazaridis.com


From peter at somewhere.com  Mon Feb  7 16:19:51 2005
From: peter at somewhere.com (Peter Maas)
Date: Mon, 07 Feb 2005 22:19:51 +0100
Subject: Python versus Perl ?
In-Reply-To: <1107726328.158314.265680@o13g2000cwo.googlegroups.com>
References: <1107695949.247611.272800@g14g2000cwa.googlegroups.com>
	<slrnd0cofg.rr5.jgrahn-nntq@frailea.sa.invalid>
	<1107726328.158314.265680@o13g2000cwo.googlegroups.com>
Message-ID: <36q4fpF563ekoU1@individual.net>

beliavsky at aol.com schrieb:
> His survey of programming languages in "The Art of Unix Programming",
> available at
> http://www.catb.org/~esr/writings/taoup/html/languageschapter.html , is
> interesting (and biased). Raymond evaluates C, C++, Shell, Perl, Tcl,
> Python, Java, and Emacs Lisp.

One part of this survey strikes me:

esr> In fact it's generally thought to be the least efficient and
esr> slowest of the major scripting languages, a price it [Python]
esr> pays for runtime type polymorphism.

If I assume Perl, Python, Ruby, Tcl and PHP to be major scripting
languages some benchmarks (http://dada.perl.it/shootout and
http://shootout.alioth.debian.org) show that Python is probably the
fastest among these (Perl is 25% faster at regex matching).

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From sjmachin at lexicon.net  Fri Feb  4 19:24:30 2005
From: sjmachin at lexicon.net (John Machin)
Date: 4 Feb 2005 16:24:30 -0800
Subject: Error!
In-Reply-To: <614c778e.0502041459.39da55c1@posting.google.com>
References: <614c778e.0502041459.39da55c1@posting.google.com>
Message-ID: <1107563070.861085.180680@g14g2000cwa.googlegroups.com>


administrata wrote:
> I'm programming Car Salesman Program.
> It's been "3 days" learning python...

>From whom or what book or what tutorial?

> But, i got problem

You got problemS. What Jeff & Brian wrote, plus:

You have "change" instead of "charge".

You forgot to add in the base price -- "actual price" according to you
comprises only the taxes and fees. Where is your car yard? We'd each
like to order a nice shiny red Ferrari :-)

Cheers,
John



From john.abel at pa.press.net  Fri Feb 18 10:10:45 2005
From: john.abel at pa.press.net (John Abel)
Date: Fri, 18 Feb 2005 15:10:45 +0000
Subject: Annoying Socket Problem
In-Reply-To: <42160090$0$28988$e4fe514c@news.xs4all.nl>
References: <mailman.2797.1108737330.22381.python-list@python.org>
	<42160090$0$28988$e4fe514c@news.xs4all.nl>
Message-ID: <42160575.1000008@pa.press.net>

Read/tried that before posting.  Even with a flush, everything hangs 
until I kill the client.

Irmen de Jong wrote:

> John Abel wrote:
>
>> I'm hoping this is something simple, and someone can point me in the 
>> right direction here.  I have a class based on SocketServer 
>> (ThreadingTCPServer), and I've used makefile on the socket so I use 
>> the "for in " routine.  My client sends it a small amount of data.  
>> However, both programs appear to hang once the data has been sent, 
>> obviously something to do with flushing.
>
>
> http://www.amk.ca/python/howto/sockets/sockets.html#SECTION000400000000000000000 
>
>
> --Irmen


-- 
*John Abel
Senior Unix Administrator*
PA News Limited
www.pa.press.net <http://www.pa.press.net>
E-Mail address: john.abel at pa.press.net <mailto:john.abel at pa.press.net>
Telephone Number : 01430 455553
Fax Number : 0870 1240192
Mobile Number : 07971 611356
The Bishop's Manor, Market Place, Howden, DN14 7BL
PA News Limited, 292 Vauxhall Bridge Road, London SW1V 1AE. Registered 
in England No. 3891053.


From fperez.net at gmail.com  Sun Feb 20 15:23:39 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Sun, 20 Feb 2005 13:23:39 -0700
Subject: recommended way of generating HTML from Python
References: <1108889625.068929.88890@z14g2000cwz.googlegroups.com>
Message-ID: <cvarfr$fuk$1@sea.gmane.org>

Michele Simionato wrote:

> What is the recommended way of generating HTML from Python? I know of
> HTMLGen and of
> few recipes in the Cookbook, but is there something which is more or
> less standard?

I'm also an htmlgen user, but it's getting a bit long in the tooth, and the
installation is not very clean (pre-distutils).  I keep an eye out for
alternatives, here's one (which I haven't looked at yet):

######
htmldata 1.0.6 is available.

http://oregonstate.edu/~barnesc/htmldata/

The htmldata module allows one to translate HTML
documents back and forth to list data structures.
This allows for programmatic reading and writing
of HTML documents, with much flexibility.

######

I could swear that I also saw another recent email announcing an htmlgen
alternative, but no amount of googling or digging through my email could turn
it up.  I think it was in the last month or so, and probably on the
python-announce list, but looking through the archives I can't find it.  Maybe
my memory is playing tricks on me.

> Also, are there plans to include a module for HTML generation in the
> standard library?
> I really would like to see some standardization in this area.

I would too.  The HTMLgen model is quite nice and clean (at least for my simple
uses), but I'd use anything, as long as it's included by default and supported.

Cheers,

f



From irmen at -nospam-remove-this-xs4all.nl  Wed Feb  2 13:42:12 2005
From: irmen at -nospam-remove-this-xs4all.nl (Irmen de Jong)
Date: Wed, 02 Feb 2005 19:42:12 +0100
Subject: hotspot profiler experience and accuracy?
In-Reply-To: <opsljvqucx6yt6e7@news.cisco.com>
References: <opsljvqucx6yt6e7@news.cisco.com>
Message-ID: <42011f05$0$28983$e4fe514c@news.xs4all.nl>

aurora wrote:

> But the numbers look skeptical. Hotspot claim 71.166 CPU seconds but 
> the  actual elapsed time is only 54s. When measuring elapsed time 
> instead of  CPU time the performance gain is only 13% with the profiler 
> running and  down to 10% when not using the profiler.
> 
> Is there something I misunderstood in reading the numbers?

Well, I'm confused too. Look at my post from a few months ago:
   http://tinyurl.com/6awzj
(note that my code contained a few errors and that you need
to use the fixed code that I posted a few replies later).

Perhaps somebody can explain a bit more about this this time? :-)

At the moment, frankly, hotspot seems rather useless.

--Irmen


From simoninusa2001 at yahoo.co.uk  Thu Feb 17 23:07:21 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 17 Feb 2005 20:07:21 -0800
Subject: Pausing a program - poll/sleep/threads?
References: <1108625477.222091.34680@l41g2000cwc.googlegroups.com>
	<1119nf8qqj5gfbe@corp.supernews.com>
	<1108666816.520517.91390@o13g2000cwo.googlegroups.com>
	<1119v7o1h4k8be5@corp.supernews.com>
Message-ID: <1108699641.787642.310960@f14g2000cwb.googlegroups.com>

Jeff Shannon wrote:

[snip]
> The amount of bandwidth and server load that will be used by a
> once-a-second query is probably pretty trivial (unless you're
> expecting this to run over internet or dialup networks -- and even
> then, it's probably not going to be worth worrying about).  Even on
an
> old 10Mbit ethernet connection, a couple of extra packets every
second
> will not make a notable difference.  This (IMO) is premature
> optimization.  :)

It is designed to work over 802.11b (so under 11Mbit).

I'm going to fire up Ethereal later and see how much traffic this would
cause, most of the commands are only about 30bytes long, and the
longest response would be the filename, it just seems to me that
polling a server once every second or two, is kinda like a DDoS....

[...]
> But does the server push events to the client?  If there's a
> filesystem error while a track is playing, how does your client know
> about it?  In addition, what happens if XMMS segfaults, or the server

> machine loses power?

No, this is not server push, the client must query the server. Plus the
InetCtrl plugin does seem to segfault quite a lot, resulting in a
socket exception - I'll have to make sure that the client stops
querying the server after a socket excption, and doesn't keep trying
(resulting in lots of error dialogs!)

[...]
> One of the big questions here is whether your client will have
> exclusive access to the XMMS server.  That is, will it be possible
for
> more than one such client to connect to the same XMMS, and/or for
XMMS
> to have direct interaction on its host machine?

No, you can have multiple connections to the server, and you can use
XMMS directly, so it would be possible for the client to miss events.

[...]
> I really think that you *do* want to do fairly frequent status checks

> with your server.  The cost is small, and the gains in responsiveness

> and robustness are potentially very significant.

Yes, I'm coming around to this POV too, but I still don't know how to
implement it (querying every 2 seconds say) in a multi-tasking manor -
as I said, sleep() hangs up the GUI, and alarm() is not portable....

Thanks for your suggestions.



From peter at engcorp.com  Sun Feb 20 18:01:56 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sun, 20 Feb 2005 18:01:56 -0500
Subject: [ANN] Python 2.4 Quick Reference available
In-Reply-To: <cva0m7$hrb$1@gemini.csx.cam.ac.uk>
References: <cv79sj$mgk$1@aphrodite.grec.isp.9tel.net>
	<1108831318.290846.5930@z14g2000cwz.googlegroups.com>
	<qnkll9kv09y.fsf@arbutus.physics.mcmaster.ca>
	<cva0m7$hrb$1@gemini.csx.cam.ac.uk>
Message-ID: <n9SdnT_FtLfDioTfRVn-2g@powergate.ca>

Michael Hoffman wrote:
> That said, I still use file() instead of open(). I think that:
> 
> for line in file("mytext.txt"):
> 
> makes a lot more sense than:
> 
> for line in open("mytext.txt"):
> 
> I guess it's because the first option sounds a lot more like English.

Call me a space-waster (or a "waste of space" ;-)  but I
still prefer this one to either of the above:

file = open('mytext.txt')
for line in file:
    ...


-Peter


From just at xs4all.nl  Tue Feb  8 04:33:26 2005
From: just at xs4all.nl (Just)
Date: Tue, 08 Feb 2005 10:33:26 +0100
Subject: variable declaration
References: <4202A022.3050209@netscape.net>
	<MSGID_2=3A5025=2F3.131_4204b0a9@fidonet.org>
	<mailman.1978.1107622451.22381.python-list@python.org>
	<slrnd0epjg.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2069.1107783321.22381.python-list@python.org>
	<slrnd0esqn.26q.apardon@rcpc42.vub.ac.be>
	<mailman.2152.1107854937.22381.python-list@python.org>
Message-ID: <just-5FC6DF.10332608022005@news1.news.xs4all.nl>

In article <mailman.2152.1107854937.22381.python-list at python.org>,
 Nick Coghlan <ncoghlan at iinet.net.au> wrote:

> Antoon Pardon wrote:ons already existing.
> > The compilor might generate a RESTORE instruction.
> 
> Whether it is done as a LOAD/STORE or a RESTORE, it has to perform the same 
> work 
> - check the name exists in the local namespace, and throw an exception if it 
> doesn't. If it the name does exist, perform a normal store operation.

But the compiler would _know_ in which scope the variable was defined, 
no?

Just